diff options
Diffstat (limited to 'drivers/char/synclink.c')
| -rw-r--r-- | drivers/char/synclink.c | 8120 |
1 files changed, 0 insertions, 8120 deletions
diff --git a/drivers/char/synclink.c b/drivers/char/synclink.c deleted file mode 100644 index 3a6824f12be2..000000000000 --- a/drivers/char/synclink.c +++ /dev/null @@ -1,8120 +0,0 @@ -/* - * linux/drivers/char/synclink.c - * - * $Id: synclink.c,v 4.38 2005/11/07 16:30:34 paulkf Exp $ - * - * Device driver for Microgate SyncLink ISA and PCI - * high speed multiprotocol serial adapters. - * - * written by Paul Fulghum for Microgate Corporation - * paulkf@microgate.com - * - * Microgate and SyncLink are trademarks of Microgate Corporation - * - * Derived from serial.c written by Theodore Ts'o and Linus Torvalds - * - * Original release 01/11/99 - * - * This code is released under the GNU General Public License (GPL) - * - * This driver is primarily intended for use in synchronous - * HDLC mode. Asynchronous mode is also provided. - * - * When operating in synchronous mode, each call to mgsl_write() - * contains exactly one complete HDLC frame. Calling mgsl_put_char - * will start assembling an HDLC frame that will not be sent until - * mgsl_flush_chars or mgsl_write is called. - * - * Synchronous receive data is reported as complete frames. To accomplish - * this, the TTY flip buffer is bypassed (too small to hold largest - * frame and may fragment frames) and the line discipline - * receive entry point is called directly. - * - * This driver has been tested with a slightly modified ppp.c driver - * for synchronous PPP. - * - * 2000/02/16 - * Added interface for syncppp.c driver (an alternate synchronous PPP - * implementation that also supports Cisco HDLC). Each device instance - * registers as a tty device AND a network device (if dosyncppp option - * is set for the device). The functionality is determined by which - * device interface is opened. - * - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED - * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, - * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES - * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR - * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED - * OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#if defined(__i386__) -# define BREAKPOINT() asm(" int $3"); -#else -# define BREAKPOINT() { } -#endif - -#define MAX_ISA_DEVICES 10 -#define MAX_PCI_DEVICES 10 -#define MAX_TOTAL_DEVICES 20 - -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/signal.h> -#include <linux/sched.h> -#include <linux/timer.h> -#include <linux/interrupt.h> -#include <linux/pci.h> -#include <linux/tty.h> -#include <linux/tty_flip.h> -#include <linux/serial.h> -#include <linux/major.h> -#include <linux/string.h> -#include <linux/fcntl.h> -#include <linux/ptrace.h> -#include <linux/ioport.h> -#include <linux/mm.h> -#include <linux/seq_file.h> -#include <linux/slab.h> -#include <linux/delay.h> -#include <linux/netdevice.h> -#include <linux/vmalloc.h> -#include <linux/init.h> -#include <linux/ioctl.h> -#include <linux/synclink.h> - -#include <asm/system.h> -#include <asm/io.h> -#include <asm/irq.h> -#include <asm/dma.h> -#include <linux/bitops.h> -#include <asm/types.h> -#include <linux/termios.h> -#include <linux/workqueue.h> -#include <linux/hdlc.h> -#include <linux/dma-mapping.h> - -#if defined(CONFIG_HDLC) || (defined(CONFIG_HDLC_MODULE) && defined(CONFIG_SYNCLINK_MODULE)) -#define SYNCLINK_GENERIC_HDLC 1 -#else -#define SYNCLINK_GENERIC_HDLC 0 -#endif - -#define GET_USER(error,value,addr) error = get_user(value,addr) -#define COPY_FROM_USER(error,dest,src,size) error = copy_from_user(dest,src,size) ? -EFAULT : 0 -#define PUT_USER(error,value,addr) error = put_user(value,addr) -#define COPY_TO_USER(error,dest,src,size) error = copy_to_user(dest,src,size) ? -EFAULT : 0 - -#include <asm/uaccess.h> - -#define RCLRVALUE 0xffff - -static MGSL_PARAMS default_params = { - MGSL_MODE_HDLC, /* unsigned long mode */ - 0, /* unsigned char loopback; */ - HDLC_FLAG_UNDERRUN_ABORT15, /* unsigned short flags; */ - HDLC_ENCODING_NRZI_SPACE, /* unsigned char encoding; */ - 0, /* unsigned long clock_speed; */ - 0xff, /* unsigned char addr_filter; */ - HDLC_CRC_16_CCITT, /* unsigned short crc_type; */ - HDLC_PREAMBLE_LENGTH_8BITS, /* unsigned char preamble_length; */ - HDLC_PREAMBLE_PATTERN_NONE, /* unsigned char preamble; */ - 9600, /* unsigned long data_rate; */ - 8, /* unsigned char data_bits; */ - 1, /* unsigned char stop_bits; */ - ASYNC_PARITY_NONE /* unsigned char parity; */ -}; - -#define SHARED_MEM_ADDRESS_SIZE 0x40000 -#define BUFFERLISTSIZE 4096 -#define DMABUFFERSIZE 4096 -#define MAXRXFRAMES 7 - -typedef struct _DMABUFFERENTRY -{ - u32 phys_addr; /* 32-bit flat physical address of data buffer */ - volatile u16 count; /* buffer size/data count */ - volatile u16 status; /* Control/status field */ - volatile u16 rcc; /* character count field */ - u16 reserved; /* padding required by 16C32 */ - u32 link; /* 32-bit flat link to next buffer entry */ - char *virt_addr; /* virtual address of data buffer */ - u32 phys_entry; /* physical address of this buffer entry */ - dma_addr_t dma_addr; -} DMABUFFERENTRY, *DMAPBUFFERENTRY; - -/* The queue of BH actions to be performed */ - -#define BH_RECEIVE 1 -#define BH_TRANSMIT 2 -#define BH_STATUS 4 - -#define IO_PIN_SHUTDOWN_LIMIT 100 - -struct _input_signal_events { - int ri_up; - int ri_down; - int dsr_up; - int dsr_down; - int dcd_up; - int dcd_down; - int cts_up; - int cts_down; -}; - -/* transmit holding buffer definitions*/ -#define MAX_TX_HOLDING_BUFFERS 5 -struct tx_holding_buffer { - int buffer_size; - unsigned char * buffer; -}; - - -/* - * Device instance data structure - */ - -struct mgsl_struct { - int magic; - struct tty_port port; - int line; - int hw_version; - - struct mgsl_icount icount; - - int timeout; - int x_char; /* xon/xoff character */ - u16 read_status_mask; - u16 ignore_status_mask; - unsigned char *xmit_buf; - int xmit_head; - int xmit_tail; - int xmit_cnt; - - wait_queue_head_t status_event_wait_q; - wait_queue_head_t event_wait_q; - struct timer_list tx_timer; /* HDLC transmit timeout timer */ - struct mgsl_struct *next_device; /* device list link */ - - spinlock_t irq_spinlock; /* spinlock for synchronizing with ISR */ - struct work_struct task; /* task structure for scheduling bh */ - - u32 EventMask; /* event trigger mask */ - u32 RecordedEvents; /* pending events */ - - u32 max_frame_size; /* as set by device config */ - - u32 pending_bh; - - bool bh_running; /* Protection from multiple */ - int isr_overflow; - bool bh_requested; - - int dcd_chkcount; /* check counts to prevent */ - int cts_chkcount; /* too many IRQs if a signal */ - int dsr_chkcount; /* is floating */ - int ri_chkcount; - - char *buffer_list; /* virtual address of Rx & Tx buffer lists */ - u32 buffer_list_phys; - dma_addr_t buffer_list_dma_addr; - - unsigned int rx_buffer_count; /* count of total allocated Rx buffers */ - DMABUFFERENTRY *rx_buffer_list; /* list of receive buffer entries */ - unsigned int current_rx_buffer; - - int num_tx_dma_buffers; /* number of tx dma frames required */ - int tx_dma_buffers_used; - unsigned int tx_buffer_count; /* count of total allocated Tx buffers */ - DMABUFFERENTRY *tx_buffer_list; /* list of transmit buffer entries */ - int start_tx_dma_buffer; /* tx dma buffer to start tx dma operation */ - int current_tx_buffer; /* next tx dma buffer to be loaded */ - - unsigned char *intermediate_rxbuffer; - - int num_tx_holding_buffers; /* number of tx holding buffer allocated */ - int get_tx_holding_index; /* next tx holding buffer for adapter to load */ - int put_tx_holding_index; /* next tx holding buffer to store user request */ - int tx_holding_count; /* number of tx holding buffers waiting */ - struct tx_holding_buffer tx_holding_buffers[MAX_TX_HOLDING_BUFFERS]; - - bool rx_enabled; - bool rx_overflow; - bool rx_rcc_underrun; - - bool tx_enabled; - bool tx_active; - u32 idle_mode; - - u16 cmr_value; - u16 tcsr_value; - - char device_name[25]; /* device instance name */ - - unsigned int bus_type; /* expansion bus type (ISA,EISA,PCI) */ - unsigned char bus; /* expansion bus number (zero based) */ - unsigned char function; /* PCI device number */ - - unsigned int io_base; /* base I/O address of adapter */ - unsigned int io_addr_size; /* size of the I/O address range */ - bool io_addr_requested; /* true if I/O address requested */ - - unsigned int irq_level; /* interrupt level */ - unsigned long irq_flags; - bool irq_requested; /* true if IRQ requested */ - - unsigned int dma_level; /* DMA channel */ - bool dma_requested; /* true if dma channel requested */ - - u16 mbre_bit; - u16 loopback_bits; - u16 usc_idle_mode; - - MGSL_PARAMS params; /* communications parameters */ - - unsigned char serial_signals; /* current serial signal states */ - - bool irq_occurred; /* for diagnostics use */ - unsigned int init_error; /* Initialization startup error (DIAGS) */ - int fDiagnosticsmode; /* Driver in Diagnostic mode? (DIAGS) */ - - u32 last_mem_alloc; - unsigned char* memory_base; /* shared memory address (PCI only) */ - u32 phys_memory_base; - bool shared_mem_requested; - - unsigned char* lcr_base; /* local config registers (PCI only) */ - u32 phys_lcr_base; - u32 lcr_offset; - bool lcr_mem_requested; - - u32 misc_ctrl_value; - char flag_buf[MAX_ASYNC_BUFFER_SIZE]; - char char_buf[MAX_ASYNC_BUFFER_SIZE]; - bool drop_rts_on_tx_done; - - bool loopmode_insert_requested; - bool loopmode_send_done_requested; - - struct _input_signal_events input_signal_events; - - /* generic HDLC device parts */ - int netcount; - spinlock_t netlock; - -#if SYNCLINK_GENERIC_HDLC - struct net_device *netdev; -#endif -}; - -#define MGSL_MAGIC 0x5401 - -/* - * The size of the serial xmit buffer is 1 page, or 4096 bytes - */ -#ifndef SERIAL_XMIT_SIZE -#define SERIAL_XMIT_SIZE 4096 -#endif - -/* - * These macros define the offsets used in calculating the - * I/O address of the specified USC registers. - */ - - -#define DCPIN 2 /* Bit 1 of I/O address */ -#define SDPIN 4 /* Bit 2 of I/O address */ - -#define DCAR 0 /* DMA command/address register */ -#define CCAR SDPIN /* channel command/address register */ -#define DATAREG DCPIN + SDPIN /* serial data register */ -#define MSBONLY 0x41 -#define LSBONLY 0x40 - -/* - * These macros define the register address (ordinal number) - * used for writing address/value pairs to the USC. - */ - -#define CMR 0x02 /* Channel mode Register */ -#define CCSR 0x04 /* Channel Command/status Register */ -#define CCR 0x06 /* Channel Control Register */ -#define PSR 0x08 /* Port status Register */ -#define PCR 0x0a /* Port Control Register */ -#define TMDR 0x0c /* Test mode Data Register */ -#define TMCR 0x0e /* Test mode Control Register */ -#define CMCR 0x10 /* Clock mode Control Register */ -#define HCR 0x12 /* Hardware Configuration Register */ -#define IVR 0x14 /* Interrupt Vector Register */ -#define IOCR 0x16 /* Input/Output Control Register */ -#define ICR 0x18 /* Interrupt Control Register */ -#define DCCR 0x1a /* Daisy Chain Control Register */ -#define MISR 0x1c /* Misc Interrupt status Register */ -#define SICR 0x1e /* status Interrupt Control Register */ -#define RDR 0x20 /* Receive Data Register */ -#define RMR 0x22 /* Receive mode Register */ -#define RCSR 0x24 /* Receive Command/status Register */ -#define RICR 0x26 /* Receive Interrupt Control Register */ -#define RSR 0x28 /* Receive Sync Register */ -#define RCLR 0x2a /* Receive count Limit Register */ -#define RCCR 0x2c /* Receive Character count Register */ -#define TC0R 0x2e /* Time Constant 0 Register */ -#define TDR 0x30 /* Transmit Data Register */ -#define TMR 0x32 /* Transmit mode Register */ -#define TCSR 0x34 /* Transmit Command/status Register */ -#define TICR 0x36 /* Transmit Interrupt Control Register */ -#define TSR 0x38 /* Transmit Sync Register */ -#define TCLR 0x3a /* Transmit count Limit Register */ -#define TCCR 0x3c /* Transmit Character count Register */ -#define TC1R 0x3e /* Time Constant 1 Register */ - - -/* - * MACRO DEFINITIONS FOR DMA REGISTERS - */ - -#define DCR 0x06 /* DMA Control Register (shared) */ -#define DACR 0x08 /* DMA Array count Register (shared) */ -#define BDCR 0x12 /* Burst/Dwell Control Register (shared) */ -#define DIVR 0x14 /* DMA Interrupt Vector Register (shared) */ -#define DICR 0x18 /* DMA Interrupt Control Register (shared) */ -#define CDIR 0x1a /* Clear DMA Interrupt Register (shared) */ -#define SDIR 0x1c /* Set DMA Interrupt Register (shared) */ - -#define TDMR 0x02 /* Transmit DMA mode Register */ -#define TDIAR 0x1e /* Transmit DMA Interrupt Arm Register */ -#define TBCR 0x2a /* Transmit Byte count Register */ -#define TARL 0x2c /* Transmit Address Register (low) */ -#define TARU 0x2e /* Transmit Address Register (high) */ -#define NTBCR 0x3a /* Next Transmit Byte count Register */ -#define NTARL 0x3c /* Next Transmit Address Register (low) */ -#define NTARU 0x3e /* Next Transmit Address Register (high) */ - -#define RDMR 0x82 /* Receive DMA mode Register (non-shared) */ -#define RDIAR 0x9e /* Receive DMA Interrupt Arm Register */ -#define RBCR 0xaa /* Receive Byte count Register */ -#define RARL 0xac /* Receive Address Register (low) */ -#define RARU 0xae /* Receive Address Register (high) */ -#define NRBCR 0xba /* Next Receive Byte count Register */ -#define NRARL 0xbc /* Next Receive Address Register (low) */ -#define NRARU 0xbe /* Next Receive Address Register (high) */ - - -/* - * MACRO DEFINITIONS FOR MODEM STATUS BITS - */ - -#define MODEMSTATUS_DTR 0x80 -#define MODEMSTATUS_DSR 0x40 -#define MODEMSTATUS_RTS 0x20 -#define MODEMSTATUS_CTS 0x10 -#define MODEMSTATUS_RI 0x04 -#define MODEMSTATUS_DCD 0x01 - - -/* - * Channel Command/Address Register (CCAR) Command Codes - */ - -#define RTCmd_Null 0x0000 -#define RTCmd_ResetHighestIus 0x1000 -#define RTCmd_TriggerChannelLoadDma 0x2000 -#define RTCmd_TriggerRxDma 0x2800 -#define RTCmd_TriggerTxDma 0x3000 -#define RTCmd_TriggerRxAndTxDma 0x3800 -#define RTCmd_PurgeRxFifo 0x4800 -#define RTCmd_PurgeTxFifo 0x5000 -#define RTCmd_PurgeRxAndTxFifo 0x5800 -#define RTCmd_LoadRcc 0x6800 -#define RTCmd_LoadTcc 0x7000 -#define RTCmd_LoadRccAndTcc 0x7800 -#define RTCmd_LoadTC0 0x8800 -#define RTCmd_LoadTC1 0x9000 -#define RTCmd_LoadTC0AndTC1 0x9800 -#define RTCmd_SerialDataLSBFirst 0xa000 -#define RTCmd_SerialDataMSBFirst 0xa800 -#define RTCmd_SelectBigEndian 0xb000 -#define RTCmd_SelectLittleEndian 0xb800 - - -/* - * DMA Command/Address Register (DCAR) Command Codes - */ - -#define DmaCmd_Null 0x0000 -#define DmaCmd_ResetTxChannel 0x1000 -#define DmaCmd_ResetRxChannel 0x1200 -#define DmaCmd_StartTxChannel 0x2000 -#define DmaCmd_StartRxChannel 0x2200 -#define DmaCmd_ContinueTxChannel 0x3000 -#define DmaCmd_ContinueRxChannel 0x3200 -#define DmaCmd_PauseTxChannel 0x4000 -#define DmaCmd_PauseRxChannel 0x4200 -#define DmaCmd_AbortTxChannel 0x5000 -#define DmaCmd_AbortRxChannel 0x5200 -#define DmaCmd_InitTxChannel 0x7000 -#define DmaCmd_InitRxChannel 0x7200 -#define DmaCmd_ResetHighestDmaIus 0x8000 -#define DmaCmd_ResetAllChannels 0x9000 -#define DmaCmd_StartAllChannels 0xa000 -#define DmaCmd_ContinueAllChannels 0xb000 -#define DmaCmd_PauseAllChannels 0xc000 -#define DmaCmd_AbortAllChannels 0xd000 -#define DmaCmd_InitAllChannels 0xf000 - -#define TCmd_Null 0x0000 -#define TCmd_ClearTxCRC 0x2000 -#define TCmd_SelectTicrTtsaData 0x4000 -#define TCmd_SelectTicrTxFifostatus 0x5000 -#define TCmd_SelectTicrIntLevel 0x6000 -#define TCmd_SelectTicrdma_level 0x7000 -#define TCmd_SendFrame 0x8000 -#define TCmd_SendAbort 0x9000 -#define TCmd_EnableDleInsertion 0xc000 -#define TCmd_DisableDleInsertion 0xd000 -#define TCmd_ClearEofEom 0xe000 -#define TCmd_SetEofEom 0xf000 - -#define RCmd_Null 0x0000 -#define RCmd_ClearRxCRC 0x2000 -#define RCmd_EnterHuntmode 0x3000 -#define RCmd_SelectRicrRtsaData 0x4000 -#define RCmd_SelectRicrRxFifostatus 0x5000 -#define RCmd_SelectRicrIntLevel 0x6000 -#define RCmd_SelectRicrdma_level 0x7000 - -/* - * Bits for enabling and disabling IRQs in Interrupt Control Register (ICR) - */ - -#define RECEIVE_STATUS BIT5 -#define RECEIVE_DATA BIT4 -#define TRANSMIT_STATUS BIT3 -#define TRANSMIT_DATA BIT2 -#define IO_PIN BIT1 -#define MISC BIT0 - - -/* - * Receive status Bits in Receive Command/status Register RCSR - */ - -#define RXSTATUS_SHORT_FRAME BIT8 -#define RXSTATUS_CODE_VIOLATION BIT8 -#define RXSTATUS_EXITED_HUNT BIT7 -#define RXSTATUS_IDLE_RECEIVED BIT6 -#define RXSTATUS_BREAK_RECEIVED BIT5 -#define RXSTATUS_ABORT_RECEIVED BIT5 -#define RXSTATUS_RXBOUND BIT4 -#define RXSTATUS_CRC_ERROR BIT3 -#define RXSTATUS_FRAMING_ERROR BIT3 -#define RXSTATUS_ABORT BIT2 -#define RXSTATUS_PARITY_ERROR BIT2 -#define RXSTATUS_OVERRUN BIT1 -#define RXSTATUS_DATA_AVAILABLE BIT0 -#define RXSTATUS_ALL 0x01f6 -#define usc_UnlatchRxstatusBits(a,b) usc_OutReg( (a), RCSR, (u16)((b) & RXSTATUS_ALL) ) - -/* - * Values for setting transmit idle mode in - * Transmit Control/status Register (TCSR) - */ -#define IDLEMODE_FLAGS 0x0000 -#define IDLEMODE_ALT_ONE_ZERO 0x0100 -#define IDLEMODE_ZERO 0x0200 -#define IDLEMODE_ONE 0x0300 -#define IDLEMODE_ALT_MARK_SPACE 0x0500 -#define IDLEMODE_SPACE 0x0600 -#define IDLEMODE_MARK 0x0700 -#define IDLEMODE_MASK 0x0700 - -/* - * IUSC revision identifiers - */ -#define IUSC_SL1660 0x4d44 -#define IUSC_PRE_SL1660 0x4553 - -/* - * Transmit status Bits in Transmit Command/status Register (TCSR) - */ - -#define TCSR_PRESERVE 0x0F00 - -#define TCSR_UNDERWAIT BIT11 -#define TXSTATUS_PREAMBLE_SENT BIT7 -#define TXSTATUS_IDLE_SENT BIT6 -#define TXSTATUS_ABORT_SENT BIT5 -#define TXSTATUS_EOF_SENT BIT4 -#define TXSTATUS_EOM_SENT BIT4 -#define TXSTATUS_CRC_SENT BIT3 -#define TXSTATUS_ALL_SENT BIT2 -#define TXSTATUS_UNDERRUN BIT1 -#define TXSTATUS_FIFO_EMPTY BIT0 -#define TXSTATUS_ALL 0x00fa -#define usc_UnlatchTxstatusBits(a,b) usc_OutReg( (a), TCSR, (u16)((a)->tcsr_value + ((b) & 0x00FF)) ) - - -#define MISCSTATUS_RXC_LATCHED BIT15 -#define MISCSTATUS_RXC BIT14 -#define MISCSTATUS_TXC_LATCHED BIT13 -#define MISCSTATUS_TXC BIT12 -#define MISCSTATUS_RI_LATCHED BIT11 -#define MISCSTATUS_RI BIT10 -#define MISCSTATUS_DSR_LATCHED BIT9 -#define MISCSTATUS_DSR BIT8 -#define MISCSTATUS_DCD_LATCHED BIT7 -#define MISCSTATUS_DCD BIT6 -#define MISCSTATUS_CTS_LATCHED BIT5 -#define MISCSTATUS_CTS BIT4 -#define MISCSTATUS_RCC_UNDERRUN BIT3 -#define MISCSTATUS_DPLL_NO_SYNC BIT2 -#define MISCSTATUS_BRG1_ZERO BIT1 -#define MISCSTATUS_BRG0_ZERO BIT0 - -#define usc_UnlatchIostatusBits(a,b) usc_OutReg((a),MISR,(u16)((b) & 0xaaa0)) -#define usc_UnlatchMiscstatusBits(a,b) usc_OutReg((a),MISR,(u16)((b) & 0x000f)) - -#define SICR_RXC_ACTIVE BIT15 -#define SICR_RXC_INACTIVE BIT14 -#define SICR_RXC (BIT15+BIT14) -#define SICR_TXC_ACTIVE BIT13 -#define SICR_TXC_INACTIVE BIT12 -#define SICR_TXC (BIT13+BIT12) -#define SICR_RI_ACTIVE BIT11 -#define SICR_RI_INACTIVE BIT10 -#define SICR_RI (BIT11+BIT10) -#define SICR_DSR_ACTIVE BIT9 -#define SICR_DSR_INACTIVE BIT8 -#define SICR_DSR (BIT9+BIT8) -#define SICR_DCD_ACTIVE BIT7 -#define SICR_DCD_INACTIVE BIT6 -#define SICR_DCD (BIT7+BIT6) -#define SICR_CTS_ACTIVE BIT5 -#define SICR_CTS_INACTIVE BIT4 -#define SICR_CTS (BIT5+BIT4) -#define SICR_RCC_UNDERFLOW BIT3 -#define SICR_DPLL_NO_SYNC BIT2 -#define SICR_BRG1_ZERO BIT1 -#define SICR_BRG0_ZERO BIT0 - -void usc_DisableMasterIrqBit( struct mgsl_struct *info ); -void usc_EnableMasterIrqBit( struct mgsl_struct *info ); -void usc_EnableInterrupts( struct mgsl_struct *info, u16 IrqMask ); -void usc_DisableInterrupts( struct mgsl_struct *info, u16 IrqMask ); -void usc_ClearIrqPendingBits( struct mgsl_struct *info, u16 IrqMask ); - -#define usc_EnableInterrupts( a, b ) \ - usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0xff00) + 0xc0 + (b)) ) - -#define usc_DisableInterrupts( a, b ) \ - usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0xff00) + 0x80 + (b)) ) - -#define usc_EnableMasterIrqBit(a) \ - usc_OutReg( (a), ICR, (u16)((usc_InReg((a),ICR) & 0x0f00) + 0xb000) ) - -#define usc_DisableMasterIrqBit(a) \ - usc_OutReg( (a), ICR, (u16)(usc_InReg((a),ICR) & 0x7f00) ) - -#define usc_ClearIrqPendingBits( a, b ) usc_OutReg( (a), DCCR, 0x40 + (b) ) - -/* - * Transmit status Bits in Transmit Control status Register (TCSR) - * and Transmit Interrupt Control Register (TICR) (except BIT2, BIT0) - */ - -#define TXSTATUS_PREAMBLE_SENT BIT7 -#define TXSTATUS_IDLE_SENT BIT6 -#define TXSTATUS_ABORT_SENT BIT5 -#define TXSTATUS_EOF BIT4 -#define TXSTATUS_CRC_SENT BIT3 -#define TXSTATUS_ALL_SENT BIT2 -#define TXSTATUS_UNDERRUN BIT1 -#define TXSTATUS_FIFO_EMPTY BIT0 - -#define DICR_MASTER BIT15 -#define DICR_TRANSMIT BIT0 -#define DICR_RECEIVE BIT1 - -#define usc_EnableDmaInterrupts(a,b) \ - usc_OutDmaReg( (a), DICR, (u16)(usc_InDmaReg((a),DICR) | (b)) ) - -#define usc_DisableDmaInterrupts(a,b) \ - usc_OutDmaReg( (a), DICR, (u16)(usc_InDmaReg((a),DICR) & ~(b)) ) - -#define usc_EnableStatusIrqs(a,b) \ - usc_OutReg( (a), SICR, (u16)(usc_InReg((a),SICR) | (b)) ) - -#define usc_DisablestatusIrqs(a,b) \ - usc_OutReg( (a), SICR, (u16)(usc_InReg((a),SICR) & ~(b)) ) - -/* Transmit status Bits in Transmit Control status Register (TCSR) */ -/* and Transmit Interrupt Control Register (TICR) (except BIT2, BIT0) */ - - -#define DISABLE_UNCONDITIONAL 0 -#define DISABLE_END_OF_FRAME 1 -#define ENABLE_UNCONDITIONAL 2 -#define ENABLE_AUTO_CTS 3 -#define ENABLE_AUTO_DCD 3 -#define usc_EnableTransmitter(a,b) \ - usc_OutReg( (a), TMR, (u16)((usc_InReg((a),TMR) & 0xfffc) | (b)) ) -#define usc_EnableReceiver(a,b) \ - usc_OutReg( (a), RMR, (u16)((usc_InReg((a),RMR) & 0xfffc) | (b)) ) - -static u16 usc_InDmaReg( struct mgsl_struct *info, u16 Port ); -static void usc_OutDmaReg( struct mgsl_struct *info, u16 Port, u16 Value ); -static void usc_DmaCmd( struct mgsl_struct *info, u16 Cmd ); - -static u16 usc_InReg( struct mgsl_struct *info, u16 Port ); -static void usc_OutReg( struct mgsl_struct *info, u16 Port, u16 Value ); -static void usc_RTCmd( struct mgsl_struct *info, u16 Cmd ); -void usc_RCmd( struct mgsl_struct *info, u16 Cmd ); -void usc_TCmd( struct mgsl_struct *info, u16 Cmd ); - -#define usc_TCmd(a,b) usc_OutReg((a), TCSR, (u16)((a)->tcsr_value + (b))) -#define usc_RCmd(a,b) usc_OutReg((a), RCSR, (b)) - -#define usc_SetTransmitSyncChars(a,s0,s1) usc_OutReg((a), TSR, (u16)(((u16)s0<<8)|(u16)s1)) - -static void usc_process_rxoverrun_sync( struct mgsl_struct *info ); -static void usc_start_receiver( struct mgsl_struct *info ); -static void usc_stop_receiver( struct mgsl_struct *info ); - -static void usc_start_transmitter( struct mgsl_struct *info ); -static void usc_stop_transmitter( struct mgsl_struct *info ); -static void usc_set_txidle( struct mgsl_struct *info ); -static void usc_load_txfifo( struct mgsl_struct *info ); - -static void usc_enable_aux_clock( struct mgsl_struct *info, u32 DataRate ); -static void usc_enable_loopback( struct mgsl_struct *info, int enable ); - -static void usc_get_serial_signals( struct mgsl_struct *info ); -static void usc_set_serial_signals( struct mgsl_struct *info ); - -static void usc_reset( struct mgsl_struct *info ); - -static void usc_set_sync_mode( struct mgsl_struct *info ); -static void usc_set_sdlc_mode( struct mgsl_struct *info ); -static void usc_set_async_mode( struct mgsl_struct *info ); -static void usc_enable_async_clock( struct mgsl_struct *info, u32 DataRate ); - -static void usc_loopback_frame( struct mgsl_struct *info ); - -static void mgsl_tx_timeout(unsigned long context); - - -static void usc_loopmode_cancel_transmit( struct mgsl_struct * info ); -static void usc_loopmode_insert_request( struct mgsl_struct * info ); -static int usc_loopmode_active( struct mgsl_struct * info); -static void usc_loopmode_send_done( struct mgsl_struct * info ); - -static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigned long arg); - -#if SYNCLINK_GENERIC_HDLC -#define dev_to_port(D) (dev_to_hdlc(D)->priv) -static void hdlcdev_tx_done(struct mgsl_struct *info); -static void hdlcdev_rx(struct mgsl_struct *info, char *buf, int size); -static int hdlcdev_init(struct mgsl_struct *info); -static void hdlcdev_exit(struct mgsl_struct *info); -#endif - -/* - * Defines a BUS descriptor value for the PCI adapter - * local bus address ranges. - */ - -#define BUS_DESCRIPTOR( WrHold, WrDly, RdDly, Nwdd, Nwad, Nxda, Nrdd, Nrad ) \ -(0x00400020 + \ -((WrHold) << 30) + \ -((WrDly) << 28) + \ -((RdDly) << 26) + \ -((Nwdd) << 20) + \ -((Nwad) << 15) + \ -((Nxda) << 13) + \ -((Nrdd) << 11) + \ -((Nrad) << 6) ) - -static void mgsl_trace_block(struct mgsl_struct *info,const char* data, int count, int xmit); - -/* - * Adapter diagnostic routines - */ -static bool mgsl_register_test( struct mgsl_struct *info ); -static bool mgsl_irq_test( struct mgsl_struct *info ); -static bool mgsl_dma_test( struct mgsl_struct *info ); -static bool mgsl_memory_test( struct mgsl_struct *info ); -static int mgsl_adapter_test( struct mgsl_struct *info ); - -/* - * device and resource management routines - */ -static int mgsl_claim_resources(struct mgsl_struct *info); -static void mgsl_release_resources(struct mgsl_struct *info); -static void mgsl_add_device(struct mgsl_struct *info); -static struct mgsl_struct* mgsl_allocate_device(void); - -/* - * DMA buffer manupulation functions. - */ -static void mgsl_free_rx_frame_buffers( struct mgsl_struct *info, unsigned int StartIndex, unsigned int EndIndex ); -static bool mgsl_get_rx_frame( struct mgsl_struct *info ); -static bool mgsl_get_raw_rx_frame( struct mgsl_struct *info ); -static void mgsl_reset_rx_dma_buffers( struct mgsl_struct *info ); -static void mgsl_reset_tx_dma_buffers( struct mgsl_struct *info ); -static int num_free_tx_dma_buffers(struct mgsl_struct *info); -static void mgsl_load_tx_dma_buffer( struct mgsl_struct *info, const char *Buffer, unsigned int BufferSize); -static void mgsl_load_pci_memory(char* TargetPtr, const char* SourcePtr, unsigned short count); - -/* - * DMA and Shared Memory buffer allocation and formatting - */ -static int mgsl_allocate_dma_buffers(struct mgsl_struct *info); -static void mgsl_free_dma_buffers(struct mgsl_struct *info); -static int mgsl_alloc_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList,int Buffercount); -static void mgsl_free_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList,int Buffercount); -static int mgsl_alloc_buffer_list_memory(struct mgsl_struct *info); -static void mgsl_free_buffer_list_memory(struct mgsl_struct *info); -static int mgsl_alloc_intermediate_rxbuffer_memory(struct mgsl_struct *info); -static void mgsl_free_intermediate_rxbuffer_memory(struct mgsl_struct *info); -static int mgsl_alloc_intermediate_txbuffer_memory(struct mgsl_struct *info); -static void mgsl_free_intermediate_txbuffer_memory(struct mgsl_struct *info); -static bool load_next_tx_holding_buffer(struct mgsl_struct *info); -static int save_tx_buffer_request(struct mgsl_struct *info,const char *Buffer, unsigned int BufferSize); - -/* - * Bottom half interrupt handlers - */ -static void mgsl_bh_handler(struct work_struct *work); -static void mgsl_bh_receive(struct mgsl_struct *info); -static void mgsl_bh_transmit(struct mgsl_struct *info); -static void mgsl_bh_status(struct mgsl_struct *info); - -/* - * Interrupt handler routines and dispatch table. - */ -static void mgsl_isr_null( struct mgsl_struct *info ); -static void mgsl_isr_transmit_data( struct mgsl_struct *info ); -static void mgsl_isr_receive_data( struct mgsl_struct *info ); -static void mgsl_isr_receive_status( struct mgsl_struct *info ); -static void mgsl_isr_transmit_status( struct mgsl_struct *info ); -static void mgsl_isr_io_pin( struct mgsl_struct *info ); -static void mgsl_isr_misc( struct mgsl_struct *info ); -static void mgsl_isr_receive_dma( struct mgsl_struct *info ); -static void mgsl_isr_transmit_dma( struct mgsl_struct *info ); - -typedef void (*isr_dispatch_func)(struct mgsl_struct *); - -static isr_dispatch_func UscIsrTable[7] = -{ - mgsl_isr_null, - mgsl_isr_misc, - mgsl_isr_io_pin, - mgsl_isr_transmit_data, - mgsl_isr_transmit_status, - mgsl_isr_receive_data, - mgsl_isr_receive_status -}; - -/* - * ioctl call handlers - */ -static int tiocmget(struct tty_struct *tty, struct file *file); -static int tiocmset(struct tty_struct *tty, struct file *file, - unsigned int set, unsigned int clear); -static int mgsl_get_stats(struct mgsl_struct * info, struct mgsl_icount - __user *user_icount); -static int mgsl_get_params(struct mgsl_struct * info, MGSL_PARAMS __user *user_params); -static int mgsl_set_params(struct mgsl_struct * info, MGSL_PARAMS __user *new_params); -static int mgsl_get_txidle(struct mgsl_struct * info, int __user *idle_mode); -static int mgsl_set_txidle(struct mgsl_struct * info, int idle_mode); -static int mgsl_txenable(struct mgsl_struct * info, int enable); -static int mgsl_txabort(struct mgsl_struct * info); -static int mgsl_rxenable(struct mgsl_struct * info, int enable); -static int mgsl_wait_event(struct mgsl_struct * info, int __user *mask); -static int mgsl_loopmode_send_done( struct mgsl_struct * info ); - -/* set non-zero on successful registration with PCI subsystem */ -static bool pci_registered; - -/* - * Global linked list of SyncLink devices - */ -static struct mgsl_struct *mgsl_device_list; -static int mgsl_device_count; - -/* - * Set this param to non-zero to load eax with the - * .text section address and breakpoint on module load. - * This is useful for use with gdb and add-symbol-file command. - */ -static int break_on_load; - -/* - * Driver major number, defaults to zero to get auto - * assigned major number. May be forced as module parameter. - */ -static int ttymajor; - -/* - * Array of user specified options for ISA adapters. - */ -static int io[MAX_ISA_DEVICES]; -static int irq[MAX_ISA_DEVICES]; -static int dma[MAX_ISA_DEVICES]; -static int debug_level; -static int maxframe[MAX_TOTAL_DEVICES]; -static int txdmabufs[MAX_TOTAL_DEVICES]; -static int txholdbufs[MAX_TOTAL_DEVICES]; - -module_param(break_on_load, bool, 0); -module_param(ttymajor, int, 0); -module_param_array(io, int, NULL, 0); -module_param_array(irq, int, NULL, 0); -module_param_array(dma, int, NULL, 0); -module_param(debug_level, int, 0); -module_param_array(maxframe, int, NULL, 0); -module_param_array(txdmabufs, int, NULL, 0); -module_param_array(txholdbufs, int, NULL, 0); - -static char *driver_name = "SyncLink serial driver"; -static char *driver_version = "$Revision: 4.38 $"; - -static int synclink_init_one (struct pci_dev *dev, - const struct pci_device_id *ent); -static void synclink_remove_one (struct pci_dev *dev); - -static struct pci_device_id synclink_pci_tbl[] = { - { PCI_VENDOR_ID_MICROGATE, PCI_DEVICE_ID_MICROGATE_USC, PCI_ANY_ID, PCI_ANY_ID, }, - { PCI_VENDOR_ID_MICROGATE, 0x0210, PCI_ANY_ID, PCI_ANY_ID, }, - { 0, }, /* terminate list */ -}; -MODULE_DEVICE_TABLE(pci, synclink_pci_tbl); - -MODULE_LICENSE("GPL"); - -static struct pci_driver synclink_pci_driver = { - .name = "synclink", - .id_table = synclink_pci_tbl, - .probe = synclink_init_one, - .remove = __devexit_p(synclink_remove_one), -}; - -static struct tty_driver *serial_driver; - -/* number of characters left in xmit buffer before we ask for more */ -#define WAKEUP_CHARS 256 - - -static void mgsl_change_params(struct mgsl_struct *info); -static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout); - -/* - * 1st function defined in .text section. Calling this function in - * init_module() followed by a breakpoint allows a remote debugger - * (gdb) to get the .text address for the add-symbol-file command. - * This allows remote debugging of dynamically loadable modules. - */ -static void* mgsl_get_text_ptr(void) -{ - return mgsl_get_text_ptr; -} - -static inline int mgsl_paranoia_check(struct mgsl_struct *info, - char *name, const char *routine) -{ -#ifdef MGSL_PARANOIA_CHECK - static const char *badmagic = - "Warning: bad magic number for mgsl struct (%s) in %s\n"; - static const char *badinfo = - "Warning: null mgsl_struct for (%s) in %s\n"; - - if (!info) { - printk(badinfo, name, routine); - return 1; - } - if (info->magic != MGSL_MAGIC) { - printk(badmagic, name, routine); - return 1; - } -#else - if (!info) - return 1; -#endif - return 0; -} - -/** - * line discipline callback wrappers - * - * The wrappers maintain line discipline references - * while calling into the line discipline. - * - * ldisc_receive_buf - pass receive data to line discipline - */ - -static void ldisc_receive_buf(struct tty_struct *tty, - const __u8 *data, char *flags, int count) -{ - struct tty_ldisc *ld; - if (!tty) - return; - ld = tty_ldisc_ref(tty); - if (ld) { - if (ld->ops->receive_buf) - ld->ops->receive_buf(tty, data, flags, count); - tty_ldisc_deref(ld); - } -} - -/* mgsl_stop() throttle (stop) transmitter - * - * Arguments: tty pointer to tty info structure - * Return Value: None - */ -static void mgsl_stop(struct tty_struct *tty) -{ - struct mgsl_struct *info = tty->driver_data; - unsigned long flags; - - if (mgsl_paranoia_check(info, tty->name, "mgsl_stop")) - return; - - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk("mgsl_stop(%s)\n",info->device_name); - - spin_lock_irqsave(&info->irq_spinlock,flags); - if (info->tx_enabled) - usc_stop_transmitter(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - -} /* end of mgsl_stop() */ - -/* mgsl_start() release (start) transmitter - * - * Arguments: tty pointer to tty info structure - * Return Value: None - */ -static void mgsl_start(struct tty_struct *tty) -{ - struct mgsl_struct *info = tty->driver_data; - unsigned long flags; - - if (mgsl_paranoia_check(info, tty->name, "mgsl_start")) - return; - - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk("mgsl_start(%s)\n",info->device_name); - - spin_lock_irqsave(&info->irq_spinlock,flags); - if (!info->tx_enabled) - usc_start_transmitter(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - -} /* end of mgsl_start() */ - -/* - * Bottom half work queue access functions - */ - -/* mgsl_bh_action() Return next bottom half action to perform. - * Return Value: BH action code or 0 if nothing to do. - */ -static int mgsl_bh_action(struct mgsl_struct *info) -{ - unsigned long flags; - int rc = 0; - - spin_lock_irqsave(&info->irq_spinlock,flags); - - if (info->pending_bh & BH_RECEIVE) { - info->pending_bh &= ~BH_RECEIVE; - rc = BH_RECEIVE; - } else if (info->pending_bh & BH_TRANSMIT) { - info->pending_bh &= ~BH_TRANSMIT; - rc = BH_TRANSMIT; - } else if (info->pending_bh & BH_STATUS) { - info->pending_bh &= ~BH_STATUS; - rc = BH_STATUS; - } - - if (!rc) { - /* Mark BH routine as complete */ - info->bh_running = false; - info->bh_requested = false; - } - - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - return rc; -} - -/* - * Perform bottom half processing of work items queued by ISR. - */ -static void mgsl_bh_handler(struct work_struct *work) -{ - struct mgsl_struct *info = - container_of(work, struct mgsl_struct, task); - int action; - - if (!info) - return; - - if ( debug_level >= DEBUG_LEVEL_BH ) - printk( "%s(%d):mgsl_bh_handler(%s) entry\n", - __FILE__,__LINE__,info->device_name); - - info->bh_running = true; - - while((action = mgsl_bh_action(info)) != 0) { - - /* Process work item */ - if ( debug_level >= DEBUG_LEVEL_BH ) - printk( "%s(%d):mgsl_bh_handler() work item action=%d\n", - __FILE__,__LINE__,action); - - switch (action) { - - case BH_RECEIVE: - mgsl_bh_receive(info); - break; - case BH_TRANSMIT: - mgsl_bh_transmit(info); - break; - case BH_STATUS: - mgsl_bh_status(info); - break; - default: - /* unknown work item ID */ - printk("Unknown work item ID=%08X!\n", action); - break; - } - } - - if ( debug_level >= DEBUG_LEVEL_BH ) - printk( "%s(%d):mgsl_bh_handler(%s) exit\n", - __FILE__,__LINE__,info->device_name); -} - -static void mgsl_bh_receive(struct mgsl_struct *info) -{ - bool (*get_rx_frame)(struct mgsl_struct *info) = - (info->params.mode == MGSL_MODE_HDLC ? mgsl_get_rx_frame : mgsl_get_raw_rx_frame); - - if ( debug_level >= DEBUG_LEVEL_BH ) - printk( "%s(%d):mgsl_bh_receive(%s)\n", - __FILE__,__LINE__,info->device_name); - - do - { - if (info->rx_rcc_underrun) { - unsigned long flags; - spin_lock_irqsave(&info->irq_spinlock,flags); - usc_start_receiver(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - return; - } - } while(get_rx_frame(info)); -} - -static void mgsl_bh_transmit(struct mgsl_struct *info) -{ - struct tty_struct *tty = info->port.tty; - unsigned long flags; - - if ( debug_level >= DEBUG_LEVEL_BH ) - printk( "%s(%d):mgsl_bh_transmit() entry on %s\n", - __FILE__,__LINE__,info->device_name); - - if (tty) - tty_wakeup(tty); - - /* if transmitter idle and loopmode_send_done_requested - * then start echoing RxD to TxD - */ - spin_lock_irqsave(&info->irq_spinlock,flags); - if ( !info->tx_active && info->loopmode_send_done_requested ) - usc_loopmode_send_done( info ); - spin_unlock_irqrestore(&info->irq_spinlock,flags); -} - -static void mgsl_bh_status(struct mgsl_struct *info) -{ - if ( debug_level >= DEBUG_LEVEL_BH ) - printk( "%s(%d):mgsl_bh_status() entry on %s\n", - __FILE__,__LINE__,info->device_name); - - info->ri_chkcount = 0; - info->dsr_chkcount = 0; - info->dcd_chkcount = 0; - info->cts_chkcount = 0; -} - -/* mgsl_isr_receive_status() - * - * Service a receive status interrupt. The type of status - * interrupt is indicated by the state of the RCSR. - * This is only used for HDLC mode. - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void mgsl_isr_receive_status( struct mgsl_struct *info ) -{ - u16 status = usc_InReg( info, RCSR ); - - if ( debug_level >= DEBUG_LEVEL_ISR ) - printk("%s(%d):mgsl_isr_receive_status status=%04X\n", - __FILE__,__LINE__,status); - - if ( (status & RXSTATUS_ABORT_RECEIVED) && - info->loopmode_insert_requested && - usc_loopmode_active(info) ) - { - ++info->icount.rxabort; - info->loopmode_insert_requested = false; - - /* clear CMR:13 to start echoing RxD to TxD */ - info->cmr_value &= ~BIT13; - usc_OutReg(info, CMR, info->cmr_value); - - /* disable received abort irq (no longer required) */ - usc_OutReg(info, RICR, - (usc_InReg(info, RICR) & ~RXSTATUS_ABORT_RECEIVED)); - } - - if (status & (RXSTATUS_EXITED_HUNT + RXSTATUS_IDLE_RECEIVED)) { - if (status & RXSTATUS_EXITED_HUNT) - info->icount.exithunt++; - if (status & RXSTATUS_IDLE_RECEIVED) - info->icount.rxidle++; - wake_up_interruptible(&info->event_wait_q); - } - - if (status & RXSTATUS_OVERRUN){ - info->icount.rxover++; - usc_process_rxoverrun_sync( info ); - } - - usc_ClearIrqPendingBits( info, RECEIVE_STATUS ); - usc_UnlatchRxstatusBits( info, status ); - -} /* end of mgsl_isr_receive_status() */ - -/* mgsl_isr_transmit_status() - * - * Service a transmit status interrupt - * HDLC mode :end of transmit frame - * Async mode:all data is sent - * transmit status is indicated by bits in the TCSR. - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void mgsl_isr_transmit_status( struct mgsl_struct *info ) -{ - u16 status = usc_InReg( info, TCSR ); - - if ( debug_level >= DEBUG_LEVEL_ISR ) - printk("%s(%d):mgsl_isr_transmit_status status=%04X\n", - __FILE__,__LINE__,status); - - usc_ClearIrqPendingBits( info, TRANSMIT_STATUS ); - usc_UnlatchTxstatusBits( info, status ); - - if ( status & (TXSTATUS_UNDERRUN | TXSTATUS_ABORT_SENT) ) - { - /* finished sending HDLC abort. This may leave */ - /* the TxFifo with data from the aborted frame */ - /* so purge the TxFifo. Also shutdown the DMA */ - /* channel in case there is data remaining in */ - /* the DMA buffer */ - usc_DmaCmd( info, DmaCmd_ResetTxChannel ); - usc_RTCmd( info, RTCmd_PurgeTxFifo ); - } - - if ( status & TXSTATUS_EOF_SENT ) - info->icount.txok++; - else if ( status & TXSTATUS_UNDERRUN ) - info->icount.txunder++; - else if ( status & TXSTATUS_ABORT_SENT ) - info->icount.txabort++; - else - info->icount.txunder++; - - info->tx_active = false; - info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; - del_timer(&info->tx_timer); - - if ( info->drop_rts_on_tx_done ) { - usc_get_serial_signals( info ); - if ( info->serial_signals & SerialSignal_RTS ) { - info->serial_signals &= ~SerialSignal_RTS; - usc_set_serial_signals( info ); - } - info->drop_rts_on_tx_done = false; - } - -#if SYNCLINK_GENERIC_HDLC - if (info->netcount) - hdlcdev_tx_done(info); - else -#endif - { - if (info->port.tty->stopped || info->port.tty->hw_stopped) { - usc_stop_transmitter(info); - return; - } - info->pending_bh |= BH_TRANSMIT; - } - -} /* end of mgsl_isr_transmit_status() */ - -/* mgsl_isr_io_pin() - * - * Service an Input/Output pin interrupt. The type of - * interrupt is indicated by bits in the MISR - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void mgsl_isr_io_pin( struct mgsl_struct *info ) -{ - struct mgsl_icount *icount; - u16 status = usc_InReg( info, MISR ); - - if ( debug_level >= DEBUG_LEVEL_ISR ) - printk("%s(%d):mgsl_isr_io_pin status=%04X\n", - __FILE__,__LINE__,status); - - usc_ClearIrqPendingBits( info, IO_PIN ); - usc_UnlatchIostatusBits( info, status ); - - if (status & (MISCSTATUS_CTS_LATCHED | MISCSTATUS_DCD_LATCHED | - MISCSTATUS_DSR_LATCHED | MISCSTATUS_RI_LATCHED) ) { - icount = &info->icount; - /* update input line counters */ - if (status & MISCSTATUS_RI_LATCHED) { - if ((info->ri_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) - usc_DisablestatusIrqs(info,SICR_RI); - icount->rng++; - if ( status & MISCSTATUS_RI ) - info->input_signal_events.ri_up++; - else - info->input_signal_events.ri_down++; - } - if (status & MISCSTATUS_DSR_LATCHED) { - if ((info->dsr_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) - usc_DisablestatusIrqs(info,SICR_DSR); - icount->dsr++; - if ( status & MISCSTATUS_DSR ) - info->input_signal_events.dsr_up++; - else - info->input_signal_events.dsr_down++; - } - if (status & MISCSTATUS_DCD_LATCHED) { - if ((info->dcd_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) - usc_DisablestatusIrqs(info,SICR_DCD); - icount->dcd++; - if (status & MISCSTATUS_DCD) { - info->input_signal_events.dcd_up++; - } else - info->input_signal_events.dcd_down++; -#if SYNCLINK_GENERIC_HDLC - if (info->netcount) { - if (status & MISCSTATUS_DCD) - netif_carrier_on(info->netdev); - else - netif_carrier_off(info->netdev); - } -#endif - } - if (status & MISCSTATUS_CTS_LATCHED) - { - if ((info->cts_chkcount)++ >= IO_PIN_SHUTDOWN_LIMIT) - usc_DisablestatusIrqs(info,SICR_CTS); - icount->cts++; - if ( status & MISCSTATUS_CTS ) - info->input_signal_events.cts_up++; - else - info->input_signal_events.cts_down++; - } - wake_up_interruptible(&info->status_event_wait_q); - wake_up_interruptible(&info->event_wait_q); - - if ( (info->port.flags & ASYNC_CHECK_CD) && - (status & MISCSTATUS_DCD_LATCHED) ) { - if ( debug_level >= DEBUG_LEVEL_ISR ) - printk("%s CD now %s...", info->device_name, - (status & MISCSTATUS_DCD) ? "on" : "off"); - if (status & MISCSTATUS_DCD) - wake_up_interruptible(&info->port.open_wait); - else { - if ( debug_level >= DEBUG_LEVEL_ISR ) - printk("doing serial hangup..."); - if (info->port.tty) - tty_hangup(info->port.tty); - } - } - - if ( (info->port.flags & ASYNC_CTS_FLOW) && - (status & MISCSTATUS_CTS_LATCHED) ) { - if (info->port.tty->hw_stopped) { - if (status & MISCSTATUS_CTS) { - if ( debug_level >= DEBUG_LEVEL_ISR ) - printk("CTS tx start..."); - if (info->port.tty) - info->port.tty->hw_stopped = 0; - usc_start_transmitter(info); - info->pending_bh |= BH_TRANSMIT; - return; - } - } else { - if (!(status & MISCSTATUS_CTS)) { - if ( debug_level >= DEBUG_LEVEL_ISR ) - printk("CTS tx stop..."); - if (info->port.tty) - info->port.tty->hw_stopped = 1; - usc_stop_transmitter(info); - } - } - } - } - - info->pending_bh |= BH_STATUS; - - /* for diagnostics set IRQ flag */ - if ( status & MISCSTATUS_TXC_LATCHED ){ - usc_OutReg( info, SICR, - (unsigned short)(usc_InReg(info,SICR) & ~(SICR_TXC_ACTIVE+SICR_TXC_INACTIVE)) ); - usc_UnlatchIostatusBits( info, MISCSTATUS_TXC_LATCHED ); - info->irq_occurred = true; - } - -} /* end of mgsl_isr_io_pin() */ - -/* mgsl_isr_transmit_data() - * - * Service a transmit data interrupt (async mode only). - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void mgsl_isr_transmit_data( struct mgsl_struct *info ) -{ - if ( debug_level >= DEBUG_LEVEL_ISR ) - printk("%s(%d):mgsl_isr_transmit_data xmit_cnt=%d\n", - __FILE__,__LINE__,info->xmit_cnt); - - usc_ClearIrqPendingBits( info, TRANSMIT_DATA ); - - if (info->port.tty->stopped || info->port.tty->hw_stopped) { - usc_stop_transmitter(info); - return; - } - - if ( info->xmit_cnt ) - usc_load_txfifo( info ); - else - info->tx_active = false; - - if (info->xmit_cnt < WAKEUP_CHARS) - info->pending_bh |= BH_TRANSMIT; - -} /* end of mgsl_isr_transmit_data() */ - -/* mgsl_isr_receive_data() - * - * Service a receive data interrupt. This occurs - * when operating in asynchronous interrupt transfer mode. - * The receive data FIFO is flushed to the receive data buffers. - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void mgsl_isr_receive_data( struct mgsl_struct *info ) -{ - int Fifocount; - u16 status; - int work = 0; - unsigned char DataByte; - struct tty_struct *tty = info->port.tty; - struct mgsl_icount *icount = &info->icount; - - if ( debug_level >= DEBUG_LEVEL_ISR ) - printk("%s(%d):mgsl_isr_receive_data\n", - __FILE__,__LINE__); - - usc_ClearIrqPendingBits( info, RECEIVE_DATA ); - - /* select FIFO status for RICR readback */ - usc_RCmd( info, RCmd_SelectRicrRxFifostatus ); - - /* clear the Wordstatus bit so that status readback */ - /* only reflects the status of this byte */ - usc_OutReg( info, RICR+LSBONLY, (u16)(usc_InReg(info, RICR+LSBONLY) & ~BIT3 )); - - /* flush the receive FIFO */ - - while( (Fifocount = (usc_InReg(info,RICR) >> 8)) ) { - int flag; - - /* read one byte from RxFIFO */ - outw( (inw(info->io_base + CCAR) & 0x0780) | (RDR+LSBONLY), - info->io_base + CCAR ); - DataByte = inb( info->io_base + CCAR ); - - /* get the status of the received byte */ - status = usc_InReg(info, RCSR); - if ( status & (RXSTATUS_FRAMING_ERROR + RXSTATUS_PARITY_ERROR + - RXSTATUS_OVERRUN + RXSTATUS_BREAK_RECEIVED) ) - usc_UnlatchRxstatusBits(info,RXSTATUS_ALL); - - icount->rx++; - - flag = 0; - if ( status & (RXSTATUS_FRAMING_ERROR + RXSTATUS_PARITY_ERROR + - RXSTATUS_OVERRUN + RXSTATUS_BREAK_RECEIVED) ) { - printk("rxerr=%04X\n",status); - /* update error statistics */ - if ( status & RXSTATUS_BREAK_RECEIVED ) { - status &= ~(RXSTATUS_FRAMING_ERROR + RXSTATUS_PARITY_ERROR); - icount->brk++; - } else if (status & RXSTATUS_PARITY_ERROR) - icount->parity++; - else if (status & RXSTATUS_FRAMING_ERROR) - icount->frame++; - else if (status & RXSTATUS_OVERRUN) { - /* must issue purge fifo cmd before */ - /* 16C32 accepts more receive chars */ - usc_RTCmd(info,RTCmd_PurgeRxFifo); - icount->overrun++; - } - - /* discard char if tty control flags say so */ - if (status & info->ignore_status_mask) - continue; - - status &= info->read_status_mask; - - if (status & RXSTATUS_BREAK_RECEIVED) { - flag = TTY_BREAK; - if (info->port.flags & ASYNC_SAK) - do_SAK(tty); - } else if (status & RXSTATUS_PARITY_ERROR) - flag = TTY_PARITY; - else if (status & RXSTATUS_FRAMING_ERROR) - flag = TTY_FRAME; - } /* end of if (error) */ - tty_insert_flip_char(tty, DataByte, flag); - if (status & RXSTATUS_OVERRUN) { - /* Overrun is special, since it's - * reported immediately, and doesn't - * affect the current character - */ - work += tty_insert_flip_char(tty, 0, TTY_OVERRUN); - } - } - - if ( debug_level >= DEBUG_LEVEL_ISR ) { - printk("%s(%d):rx=%d brk=%d parity=%d frame=%d overrun=%d\n", - __FILE__,__LINE__,icount->rx,icount->brk, - icount->parity,icount->frame,icount->overrun); - } - - if(work) - tty_flip_buffer_push(tty); -} - -/* mgsl_isr_misc() - * - * Service a miscellaneous interrupt source. - * - * Arguments: info pointer to device extension (instance data) - * Return Value: None - */ -static void mgsl_isr_misc( struct mgsl_struct *info ) -{ - u16 status = usc_InReg( info, MISR ); - - if ( debug_level >= DEBUG_LEVEL_ISR ) - printk("%s(%d):mgsl_isr_misc status=%04X\n", - __FILE__,__LINE__,status); - - if ((status & MISCSTATUS_RCC_UNDERRUN) && - (info->params.mode == MGSL_MODE_HDLC)) { - - /* turn off receiver and rx DMA */ - usc_EnableReceiver(info,DISABLE_UNCONDITIONAL); - usc_DmaCmd(info, DmaCmd_ResetRxChannel); - usc_UnlatchRxstatusBits(info, RXSTATUS_ALL); - usc_ClearIrqPendingBits(info, RECEIVE_DATA + RECEIVE_STATUS); - usc_DisableInterrupts(info, RECEIVE_DATA + RECEIVE_STATUS); - - /* schedule BH handler to restart receiver */ - info->pending_bh |= BH_RECEIVE; - info->rx_rcc_underrun = true; - } - - usc_ClearIrqPendingBits( info, MISC ); - usc_UnlatchMiscstatusBits( info, status ); - -} /* end of mgsl_isr_misc() */ - -/* mgsl_isr_null() - * - * Services undefined interrupt vectors from the - * USC. (hence this function SHOULD never be called) - * - * Arguments: info pointer to device extension (instance data) - * Return Value: None - */ -static void mgsl_isr_null( struct mgsl_struct *info ) -{ - -} /* end of mgsl_isr_null() */ - -/* mgsl_isr_receive_dma() - * - * Service a receive DMA channel interrupt. - * For this driver there are two sources of receive DMA interrupts - * as identified in the Receive DMA mode Register (RDMR): - * - * BIT3 EOA/EOL End of List, all receive buffers in receive - * buffer list have been filled (no more free buffers - * available). The DMA controller has shut down. - * - * BIT2 EOB End of Buffer. This interrupt occurs when a receive - * DMA buffer is terminated in response to completion - * of a good frame or a frame with errors. The status - * of the frame is stored in the buffer entry in the - * list of receive buffer entries. - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void mgsl_isr_receive_dma( struct mgsl_struct *info ) -{ - u16 status; - - /* clear interrupt pending and IUS bit for Rx DMA IRQ */ - usc_OutDmaReg( info, CDIR, BIT9+BIT1 ); - - /* Read the receive DMA status to identify interrupt type. */ - /* This also clears the status bits. */ - status = usc_InDmaReg( info, RDMR ); - - if ( debug_level >= DEBUG_LEVEL_ISR ) - printk("%s(%d):mgsl_isr_receive_dma(%s) status=%04X\n", - __FILE__,__LINE__,info->device_name,status); - - info->pending_bh |= BH_RECEIVE; - - if ( status & BIT3 ) { - info->rx_overflow = true; - info->icount.buf_overrun++; - } - -} /* end of mgsl_isr_receive_dma() */ - -/* mgsl_isr_transmit_dma() - * - * This function services a transmit DMA channel interrupt. - * - * For this driver there is one source of transmit DMA interrupts - * as identified in the Transmit DMA Mode Register (TDMR): - * - * BIT2 EOB End of Buffer. This interrupt occurs when a - * transmit DMA buffer has been emptied. - * - * The driver maintains enough transmit DMA buffers to hold at least - * one max frame size transmit frame. When operating in a buffered - * transmit mode, there may be enough transmit DMA buffers to hold at - * least two or more max frame size frames. On an EOB condition, - * determine if there are any queued transmit buffers and copy into - * transmit DMA buffers if we have room. - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void mgsl_isr_transmit_dma( struct mgsl_struct *info ) -{ - u16 status; - - /* clear interrupt pending and IUS bit for Tx DMA IRQ */ - usc_OutDmaReg(info, CDIR, BIT8+BIT0 ); - - /* Read the transmit DMA status to identify interrupt type. */ - /* This also clears the status bits. */ - - status = usc_InDmaReg( info, TDMR ); - - if ( debug_level >= DEBUG_LEVEL_ISR ) - printk("%s(%d):mgsl_isr_transmit_dma(%s) status=%04X\n", - __FILE__,__LINE__,info->device_name,status); - - if ( status & BIT2 ) { - --info->tx_dma_buffers_used; - - /* if there are transmit frames queued, - * try to load the next one - */ - if ( load_next_tx_holding_buffer(info) ) { - /* if call returns non-zero value, we have - * at least one free tx holding buffer - */ - info->pending_bh |= BH_TRANSMIT; - } - } - -} /* end of mgsl_isr_transmit_dma() */ - -/* mgsl_interrupt() - * - * Interrupt service routine entry point. - * - * Arguments: - * - * irq interrupt number that caused interrupt - * dev_id device ID supplied during interrupt registration - * - * Return Value: None - */ -static irqreturn_t mgsl_interrupt(int dummy, void *dev_id) -{ - struct mgsl_struct *info = dev_id; - u16 UscVector; - u16 DmaVector; - - if ( debug_level >= DEBUG_LEVEL_ISR ) - printk(KERN_DEBUG "%s(%d):mgsl_interrupt(%d)entry.\n", - __FILE__, __LINE__, info->irq_level); - - spin_lock(&info->irq_spinlock); - - for(;;) { - /* Read the interrupt vectors from hardware. */ - UscVector = usc_InReg(info, IVR) >> 9; - DmaVector = usc_InDmaReg(info, DIVR); - - if ( debug_level >= DEBUG_LEVEL_ISR ) - printk("%s(%d):%s UscVector=%08X DmaVector=%08X\n", - __FILE__,__LINE__,info->device_name,UscVector,DmaVector); - - if ( !UscVector && !DmaVector ) - break; - - /* Dispatch interrupt vector */ - if ( UscVector ) - (*UscIsrTable[UscVector])(info); - else if ( (DmaVector&(BIT10|BIT9)) == BIT10) - mgsl_isr_transmit_dma(info); - else - mgsl_isr_receive_dma(info); - - if ( info->isr_overflow ) { - printk(KERN_ERR "%s(%d):%s isr overflow irq=%d\n", - __FILE__, __LINE__, info->device_name, info->irq_level); - usc_DisableMasterIrqBit(info); - usc_DisableDmaInterrupts(info,DICR_MASTER); - break; - } - } - - /* Request bottom half processing if there's something - * for it to do and the bh is not already running - */ - - if ( info->pending_bh && !info->bh_running && !info->bh_requested ) { - if ( debug_level >= DEBUG_LEVEL_ISR ) - printk("%s(%d):%s queueing bh task.\n", - __FILE__,__LINE__,info->device_name); - schedule_work(&info->task); - info->bh_requested = true; - } - - spin_unlock(&info->irq_spinlock); - - if ( debug_level >= DEBUG_LEVEL_ISR ) - printk(KERN_DEBUG "%s(%d):mgsl_interrupt(%d)exit.\n", - __FILE__, __LINE__, info->irq_level); - - return IRQ_HANDLED; -} /* end of mgsl_interrupt() */ - -/* startup() - * - * Initialize and start device. - * - * Arguments: info pointer to device instance data - * Return Value: 0 if success, otherwise error code - */ -static int startup(struct mgsl_struct * info) -{ - int retval = 0; - - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk("%s(%d):mgsl_startup(%s)\n",__FILE__,__LINE__,info->device_name); - - if (info->port.flags & ASYNC_INITIALIZED) - return 0; - - if (!info->xmit_buf) { - /* allocate a page of memory for a transmit buffer */ - info->xmit_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL); - if (!info->xmit_buf) { - printk(KERN_ERR"%s(%d):%s can't allocate transmit buffer\n", - __FILE__,__LINE__,info->device_name); - return -ENOMEM; - } - } - - info->pending_bh = 0; - - memset(&info->icount, 0, sizeof(info->icount)); - - setup_timer(&info->tx_timer, mgsl_tx_timeout, (unsigned long)info); - - /* Allocate and claim adapter resources */ - retval = mgsl_claim_resources(info); - - /* perform existence check and diagnostics */ - if ( !retval ) - retval = mgsl_adapter_test(info); - - if ( retval ) { - if (capable(CAP_SYS_ADMIN) && info->port.tty) - set_bit(TTY_IO_ERROR, &info->port.tty->flags); - mgsl_release_resources(info); - return retval; - } - - /* program hardware for current parameters */ - mgsl_change_params(info); - - if (info->port.tty) - clear_bit(TTY_IO_ERROR, &info->port.tty->flags); - - info->port.flags |= ASYNC_INITIALIZED; - - return 0; - -} /* end of startup() */ - -/* shutdown() - * - * Called by mgsl_close() and mgsl_hangup() to shutdown hardware - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void shutdown(struct mgsl_struct * info) -{ - unsigned long flags; - - if (!(info->port.flags & ASYNC_INITIALIZED)) - return; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_shutdown(%s)\n", - __FILE__,__LINE__, info->device_name ); - - /* clear status wait queue because status changes */ - /* can't happen after shutting down the hardware */ - wake_up_interruptible(&info->status_event_wait_q); - wake_up_interruptible(&info->event_wait_q); - - del_timer_sync(&info->tx_timer); - - if (info->xmit_buf) { - free_page((unsigned long) info->xmit_buf); - info->xmit_buf = NULL; - } - - spin_lock_irqsave(&info->irq_spinlock,flags); - usc_DisableMasterIrqBit(info); - usc_stop_receiver(info); - usc_stop_transmitter(info); - usc_DisableInterrupts(info,RECEIVE_DATA + RECEIVE_STATUS + - TRANSMIT_DATA + TRANSMIT_STATUS + IO_PIN + MISC ); - usc_DisableDmaInterrupts(info,DICR_MASTER + DICR_TRANSMIT + DICR_RECEIVE); - - /* Disable DMAEN (Port 7, Bit 14) */ - /* This disconnects the DMA request signal from the ISA bus */ - /* on the ISA adapter. This has no effect for the PCI adapter */ - usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT15) | BIT14)); - - /* Disable INTEN (Port 6, Bit12) */ - /* This disconnects the IRQ request signal to the ISA bus */ - /* on the ISA adapter. This has no effect for the PCI adapter */ - usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) | BIT12)); - - if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) { - info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); - usc_set_serial_signals(info); - } - - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - mgsl_release_resources(info); - - if (info->port.tty) - set_bit(TTY_IO_ERROR, &info->port.tty->flags); - - info->port.flags &= ~ASYNC_INITIALIZED; - -} /* end of shutdown() */ - -static void mgsl_program_hw(struct mgsl_struct *info) -{ - unsigned long flags; - - spin_lock_irqsave(&info->irq_spinlock,flags); - - usc_stop_receiver(info); - usc_stop_transmitter(info); - info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; - - if (info->params.mode == MGSL_MODE_HDLC || - info->params.mode == MGSL_MODE_RAW || - info->netcount) - usc_set_sync_mode(info); - else - usc_set_async_mode(info); - - usc_set_serial_signals(info); - - info->dcd_chkcount = 0; - info->cts_chkcount = 0; - info->ri_chkcount = 0; - info->dsr_chkcount = 0; - - usc_EnableStatusIrqs(info,SICR_CTS+SICR_DSR+SICR_DCD+SICR_RI); - usc_EnableInterrupts(info, IO_PIN); - usc_get_serial_signals(info); - - if (info->netcount || info->port.tty->termios->c_cflag & CREAD) - usc_start_receiver(info); - - spin_unlock_irqrestore(&info->irq_spinlock,flags); -} - -/* Reconfigure adapter based on new parameters - */ -static void mgsl_change_params(struct mgsl_struct *info) -{ - unsigned cflag; - int bits_per_char; - - if (!info->port.tty || !info->port.tty->termios) - return; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_change_params(%s)\n", - __FILE__,__LINE__, info->device_name ); - - cflag = info->port.tty->termios->c_cflag; - - /* if B0 rate (hangup) specified then negate DTR and RTS */ - /* otherwise assert DTR and RTS */ - if (cflag & CBAUD) - info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; - else - info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); - - /* byte size and parity */ - - switch (cflag & CSIZE) { - case CS5: info->params.data_bits = 5; break; - case CS6: info->params.data_bits = 6; break; - case CS7: info->params.data_bits = 7; break; - case CS8: info->params.data_bits = 8; break; - /* Never happens, but GCC is too dumb to figure it out */ - default: info->params.data_bits = 7; break; - } - - if (cflag & CSTOPB) - info->params.stop_bits = 2; - else - info->params.stop_bits = 1; - - info->params.parity = ASYNC_PARITY_NONE; - if (cflag & PARENB) { - if (cflag & PARODD) - info->params.parity = ASYNC_PARITY_ODD; - else - info->params.parity = ASYNC_PARITY_EVEN; -#ifdef CMSPAR - if (cflag & CMSPAR) - info->params.parity = ASYNC_PARITY_SPACE; -#endif - } - - /* calculate number of jiffies to transmit a full - * FIFO (32 bytes) at specified data rate - */ - bits_per_char = info->params.data_bits + - info->params.stop_bits + 1; - - /* if port data rate is set to 460800 or less then - * allow tty settings to override, otherwise keep the - * current data rate. - */ - if (info->params.data_rate <= 460800) - info->params.data_rate = tty_get_baud_rate(info->port.tty); - - if ( info->params.data_rate ) { - info->timeout = (32*HZ*bits_per_char) / - info->params.data_rate; - } - info->timeout += HZ/50; /* Add .02 seconds of slop */ - - if (cflag & CRTSCTS) - info->port.flags |= ASYNC_CTS_FLOW; - else - info->port.flags &= ~ASYNC_CTS_FLOW; - - if (cflag & CLOCAL) - info->port.flags &= ~ASYNC_CHECK_CD; - else - info->port.flags |= ASYNC_CHECK_CD; - - /* process tty input control flags */ - - info->read_status_mask = RXSTATUS_OVERRUN; - if (I_INPCK(info->port.tty)) - info->read_status_mask |= RXSTATUS_PARITY_ERROR | RXSTATUS_FRAMING_ERROR; - if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty)) - info->read_status_mask |= RXSTATUS_BREAK_RECEIVED; - - if (I_IGNPAR(info->port.tty)) - info->ignore_status_mask |= RXSTATUS_PARITY_ERROR | RXSTATUS_FRAMING_ERROR; - if (I_IGNBRK(info->port.tty)) { - info->ignore_status_mask |= RXSTATUS_BREAK_RECEIVED; - /* If ignoring parity and break indicators, ignore - * overruns too. (For real raw support). - */ - if (I_IGNPAR(info->port.tty)) - info->ignore_status_mask |= RXSTATUS_OVERRUN; - } - - mgsl_program_hw(info); - -} /* end of mgsl_change_params() */ - -/* mgsl_put_char() - * - * Add a character to the transmit buffer. - * - * Arguments: tty pointer to tty information structure - * ch character to add to transmit buffer - * - * Return Value: None - */ -static int mgsl_put_char(struct tty_struct *tty, unsigned char ch) -{ - struct mgsl_struct *info = tty->driver_data; - unsigned long flags; - int ret = 0; - - if (debug_level >= DEBUG_LEVEL_INFO) { - printk(KERN_DEBUG "%s(%d):mgsl_put_char(%d) on %s\n", - __FILE__, __LINE__, ch, info->device_name); - } - - if (mgsl_paranoia_check(info, tty->name, "mgsl_put_char")) - return 0; - - if (!info->xmit_buf) - return 0; - - spin_lock_irqsave(&info->irq_spinlock, flags); - - if ((info->params.mode == MGSL_MODE_ASYNC ) || !info->tx_active) { - if (info->xmit_cnt < SERIAL_XMIT_SIZE - 1) { - info->xmit_buf[info->xmit_head++] = ch; - info->xmit_head &= SERIAL_XMIT_SIZE-1; - info->xmit_cnt++; - ret = 1; - } - } - spin_unlock_irqrestore(&info->irq_spinlock, flags); - return ret; - -} /* end of mgsl_put_char() */ - -/* mgsl_flush_chars() - * - * Enable transmitter so remaining characters in the - * transmit buffer are sent. - * - * Arguments: tty pointer to tty information structure - * Return Value: None - */ -static void mgsl_flush_chars(struct tty_struct *tty) -{ - struct mgsl_struct *info = tty->driver_data; - unsigned long flags; - - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk( "%s(%d):mgsl_flush_chars() entry on %s xmit_cnt=%d\n", - __FILE__,__LINE__,info->device_name,info->xmit_cnt); - - if (mgsl_paranoia_check(info, tty->name, "mgsl_flush_chars")) - return; - - if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || - !info->xmit_buf) - return; - - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk( "%s(%d):mgsl_flush_chars() entry on %s starting transmitter\n", - __FILE__,__LINE__,info->device_name ); - - spin_lock_irqsave(&info->irq_spinlock,flags); - - if (!info->tx_active) { - if ( (info->params.mode == MGSL_MODE_HDLC || - info->params.mode == MGSL_MODE_RAW) && info->xmit_cnt ) { - /* operating in synchronous (frame oriented) mode */ - /* copy data from circular xmit_buf to */ - /* transmit DMA buffer. */ - mgsl_load_tx_dma_buffer(info, - info->xmit_buf,info->xmit_cnt); - } - usc_start_transmitter(info); - } - - spin_unlock_irqrestore(&info->irq_spinlock,flags); - -} /* end of mgsl_flush_chars() */ - -/* mgsl_write() - * - * Send a block of data - * - * Arguments: - * - * tty pointer to tty information structure - * buf pointer to buffer containing send data - * count size of send data in bytes - * - * Return Value: number of characters written - */ -static int mgsl_write(struct tty_struct * tty, - const unsigned char *buf, int count) -{ - int c, ret = 0; - struct mgsl_struct *info = tty->driver_data; - unsigned long flags; - - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk( "%s(%d):mgsl_write(%s) count=%d\n", - __FILE__,__LINE__,info->device_name,count); - - if (mgsl_paranoia_check(info, tty->name, "mgsl_write")) - goto cleanup; - - if (!info->xmit_buf) - goto cleanup; - - if ( info->params.mode == MGSL_MODE_HDLC || - info->params.mode == MGSL_MODE_RAW ) { - /* operating in synchronous (frame oriented) mode */ - /* operating in synchronous (frame oriented) mode */ - if (info->tx_active) { - - if ( info->params.mode == MGSL_MODE_HDLC ) { - ret = 0; - goto cleanup; - } - /* transmitter is actively sending data - - * if we have multiple transmit dma and - * holding buffers, attempt to queue this - * frame for transmission at a later time. - */ - if (info->tx_holding_count >= info->num_tx_holding_buffers ) { - /* no tx holding buffers available */ - ret = 0; - goto cleanup; - } - - /* queue transmit frame request */ - ret = count; - save_tx_buffer_request(info,buf,count); - - /* if we have sufficient tx dma buffers, - * load the next buffered tx request - */ - spin_lock_irqsave(&info->irq_spinlock,flags); - load_next_tx_holding_buffer(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - goto cleanup; - } - - /* if operating in HDLC LoopMode and the adapter */ - /* has yet to be inserted into the loop, we can't */ - /* transmit */ - - if ( (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) && - !usc_loopmode_active(info) ) - { - ret = 0; - goto cleanup; - } - - if ( info->xmit_cnt ) { - /* Send accumulated from send_char() calls */ - /* as frame and wait before accepting more data. */ - ret = 0; - - /* copy data from circular xmit_buf to */ - /* transmit DMA buffer. */ - mgsl_load_tx_dma_buffer(info, - info->xmit_buf,info->xmit_cnt); - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk( "%s(%d):mgsl_write(%s) sync xmit_cnt flushing\n", - __FILE__,__LINE__,info->device_name); - } else { - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk( "%s(%d):mgsl_write(%s) sync transmit accepted\n", - __FILE__,__LINE__,info->device_name); - ret = count; - info->xmit_cnt = count; - mgsl_load_tx_dma_buffer(info,buf,count); - } - } else { - while (1) { - spin_lock_irqsave(&info->irq_spinlock,flags); - c = min_t(int, count, - min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, - SERIAL_XMIT_SIZE - info->xmit_head)); - if (c <= 0) { - spin_unlock_irqrestore(&info->irq_spinlock,flags); - break; - } - memcpy(info->xmit_buf + info->xmit_head, buf, c); - info->xmit_head = ((info->xmit_head + c) & - (SERIAL_XMIT_SIZE-1)); - info->xmit_cnt += c; - spin_unlock_irqrestore(&info->irq_spinlock,flags); - buf += c; - count -= c; - ret += c; - } - } - - if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) { - spin_lock_irqsave(&info->irq_spinlock,flags); - if (!info->tx_active) - usc_start_transmitter(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - } -cleanup: - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk( "%s(%d):mgsl_write(%s) returning=%d\n", - __FILE__,__LINE__,info->device_name,ret); - - return ret; - -} /* end of mgsl_write() */ - -/* mgsl_write_room() - * - * Return the count of free bytes in transmit buffer - * - * Arguments: tty pointer to tty info structure - * Return Value: None - */ -static int mgsl_write_room(struct tty_struct *tty) -{ - struct mgsl_struct *info = tty->driver_data; - int ret; - - if (mgsl_paranoia_check(info, tty->name, "mgsl_write_room")) - return 0; - ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; - if (ret < 0) - ret = 0; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_write_room(%s)=%d\n", - __FILE__,__LINE__, info->device_name,ret ); - - if ( info->params.mode == MGSL_MODE_HDLC || - info->params.mode == MGSL_MODE_RAW ) { - /* operating in synchronous (frame oriented) mode */ - if ( info->tx_active ) - return 0; - else - return HDLC_MAX_FRAME_SIZE; - } - - return ret; - -} /* end of mgsl_write_room() */ - -/* mgsl_chars_in_buffer() - * - * Return the count of bytes in transmit buffer - * - * Arguments: tty pointer to tty info structure - * Return Value: None - */ -static int mgsl_chars_in_buffer(struct tty_struct *tty) -{ - struct mgsl_struct *info = tty->driver_data; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_chars_in_buffer(%s)\n", - __FILE__,__LINE__, info->device_name ); - - if (mgsl_paranoia_check(info, tty->name, "mgsl_chars_in_buffer")) - return 0; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_chars_in_buffer(%s)=%d\n", - __FILE__,__LINE__, info->device_name,info->xmit_cnt ); - - if ( info->params.mode == MGSL_MODE_HDLC || - info->params.mode == MGSL_MODE_RAW ) { - /* operating in synchronous (frame oriented) mode */ - if ( info->tx_active ) - return info->max_frame_size; - else - return 0; - } - - return info->xmit_cnt; -} /* end of mgsl_chars_in_buffer() */ - -/* mgsl_flush_buffer() - * - * Discard all data in the send buffer - * - * Arguments: tty pointer to tty info structure - * Return Value: None - */ -static void mgsl_flush_buffer(struct tty_struct *tty) -{ - struct mgsl_struct *info = tty->driver_data; - unsigned long flags; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_flush_buffer(%s) entry\n", - __FILE__,__LINE__, info->device_name ); - - if (mgsl_paranoia_check(info, tty->name, "mgsl_flush_buffer")) - return; - - spin_lock_irqsave(&info->irq_spinlock,flags); - info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; - del_timer(&info->tx_timer); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - tty_wakeup(tty); -} - -/* mgsl_send_xchar() - * - * Send a high-priority XON/XOFF character - * - * Arguments: tty pointer to tty info structure - * ch character to send - * Return Value: None - */ -static void mgsl_send_xchar(struct tty_struct *tty, char ch) -{ - struct mgsl_struct *info = tty->driver_data; - unsigned long flags; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_send_xchar(%s,%d)\n", - __FILE__,__LINE__, info->device_name, ch ); - - if (mgsl_paranoia_check(info, tty->name, "mgsl_send_xchar")) - return; - - info->x_char = ch; - if (ch) { - /* Make sure transmit interrupts are on */ - spin_lock_irqsave(&info->irq_spinlock,flags); - if (!info->tx_enabled) - usc_start_transmitter(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - } -} /* end of mgsl_send_xchar() */ - -/* mgsl_throttle() - * - * Signal remote device to throttle send data (our receive data) - * - * Arguments: tty pointer to tty info structure - * Return Value: None - */ -static void mgsl_throttle(struct tty_struct * tty) -{ - struct mgsl_struct *info = tty->driver_data; - unsigned long flags; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_throttle(%s) entry\n", - __FILE__,__LINE__, info->device_name ); - - if (mgsl_paranoia_check(info, tty->name, "mgsl_throttle")) - return; - - if (I_IXOFF(tty)) - mgsl_send_xchar(tty, STOP_CHAR(tty)); - - if (tty->termios->c_cflag & CRTSCTS) { - spin_lock_irqsave(&info->irq_spinlock,flags); - info->serial_signals &= ~SerialSignal_RTS; - usc_set_serial_signals(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - } -} /* end of mgsl_throttle() */ - -/* mgsl_unthrottle() - * - * Signal remote device to stop throttling send data (our receive data) - * - * Arguments: tty pointer to tty info structure - * Return Value: None - */ -static void mgsl_unthrottle(struct tty_struct * tty) -{ - struct mgsl_struct *info = tty->driver_data; - unsigned long flags; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_unthrottle(%s) entry\n", - __FILE__,__LINE__, info->device_name ); - - if (mgsl_paranoia_check(info, tty->name, "mgsl_unthrottle")) - return; - - if (I_IXOFF(tty)) { - if (info->x_char) - info->x_char = 0; - else - mgsl_send_xchar(tty, START_CHAR(tty)); - } - - if (tty->termios->c_cflag & CRTSCTS) { - spin_lock_irqsave(&info->irq_spinlock,flags); - info->serial_signals |= SerialSignal_RTS; - usc_set_serial_signals(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - } - -} /* end of mgsl_unthrottle() */ - -/* mgsl_get_stats() - * - * get the current serial parameters information - * - * Arguments: info pointer to device instance data - * user_icount pointer to buffer to hold returned stats - * - * Return Value: 0 if success, otherwise error code - */ -static int mgsl_get_stats(struct mgsl_struct * info, struct mgsl_icount __user *user_icount) -{ - int err; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_get_params(%s)\n", - __FILE__,__LINE__, info->device_name); - - if (!user_icount) { - memset(&info->icount, 0, sizeof(info->icount)); - } else { - mutex_lock(&info->port.mutex); - COPY_TO_USER(err, user_icount, &info->icount, sizeof(struct mgsl_icount)); - mutex_unlock(&info->port.mutex); - if (err) - return -EFAULT; - } - - return 0; - -} /* end of mgsl_get_stats() */ - -/* mgsl_get_params() - * - * get the current serial parameters information - * - * Arguments: info pointer to device instance data - * user_params pointer to buffer to hold returned params - * - * Return Value: 0 if success, otherwise error code - */ -static int mgsl_get_params(struct mgsl_struct * info, MGSL_PARAMS __user *user_params) -{ - int err; - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_get_params(%s)\n", - __FILE__,__LINE__, info->device_name); - - mutex_lock(&info->port.mutex); - COPY_TO_USER(err,user_params, &info->params, sizeof(MGSL_PARAMS)); - mutex_unlock(&info->port.mutex); - if (err) { - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk( "%s(%d):mgsl_get_params(%s) user buffer copy failed\n", - __FILE__,__LINE__,info->device_name); - return -EFAULT; - } - - return 0; - -} /* end of mgsl_get_params() */ - -/* mgsl_set_params() - * - * set the serial parameters - * - * Arguments: - * - * info pointer to device instance data - * new_params user buffer containing new serial params - * - * Return Value: 0 if success, otherwise error code - */ -static int mgsl_set_params(struct mgsl_struct * info, MGSL_PARAMS __user *new_params) -{ - unsigned long flags; - MGSL_PARAMS tmp_params; - int err; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_set_params %s\n", __FILE__,__LINE__, - info->device_name ); - COPY_FROM_USER(err,&tmp_params, new_params, sizeof(MGSL_PARAMS)); - if (err) { - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk( "%s(%d):mgsl_set_params(%s) user buffer copy failed\n", - __FILE__,__LINE__,info->device_name); - return -EFAULT; - } - - mutex_lock(&info->port.mutex); - spin_lock_irqsave(&info->irq_spinlock,flags); - memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - mgsl_change_params(info); - mutex_unlock(&info->port.mutex); - - return 0; - -} /* end of mgsl_set_params() */ - -/* mgsl_get_txidle() - * - * get the current transmit idle mode - * - * Arguments: info pointer to device instance data - * idle_mode pointer to buffer to hold returned idle mode - * - * Return Value: 0 if success, otherwise error code - */ -static int mgsl_get_txidle(struct mgsl_struct * info, int __user *idle_mode) -{ - int err; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_get_txidle(%s)=%d\n", - __FILE__,__LINE__, info->device_name, info->idle_mode); - - COPY_TO_USER(err,idle_mode, &info->idle_mode, sizeof(int)); - if (err) { - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk( "%s(%d):mgsl_get_txidle(%s) user buffer copy failed\n", - __FILE__,__LINE__,info->device_name); - return -EFAULT; - } - - return 0; - -} /* end of mgsl_get_txidle() */ - -/* mgsl_set_txidle() service ioctl to set transmit idle mode - * - * Arguments: info pointer to device instance data - * idle_mode new idle mode - * - * Return Value: 0 if success, otherwise error code - */ -static int mgsl_set_txidle(struct mgsl_struct * info, int idle_mode) -{ - unsigned long flags; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_set_txidle(%s,%d)\n", __FILE__,__LINE__, - info->device_name, idle_mode ); - - spin_lock_irqsave(&info->irq_spinlock,flags); - info->idle_mode = idle_mode; - usc_set_txidle( info ); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - return 0; - -} /* end of mgsl_set_txidle() */ - -/* mgsl_txenable() - * - * enable or disable the transmitter - * - * Arguments: - * - * info pointer to device instance data - * enable 1 = enable, 0 = disable - * - * Return Value: 0 if success, otherwise error code - */ -static int mgsl_txenable(struct mgsl_struct * info, int enable) -{ - unsigned long flags; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_txenable(%s,%d)\n", __FILE__,__LINE__, - info->device_name, enable); - - spin_lock_irqsave(&info->irq_spinlock,flags); - if ( enable ) { - if ( !info->tx_enabled ) { - - usc_start_transmitter(info); - /*-------------------------------------------------- - * if HDLC/SDLC Loop mode, attempt to insert the - * station in the 'loop' by setting CMR:13. Upon - * receipt of the next GoAhead (RxAbort) sequence, - * the OnLoop indicator (CCSR:7) should go active - * to indicate that we are on the loop - *--------------------------------------------------*/ - if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE ) - usc_loopmode_insert_request( info ); - } - } else { - if ( info->tx_enabled ) - usc_stop_transmitter(info); - } - spin_unlock_irqrestore(&info->irq_spinlock,flags); - return 0; - -} /* end of mgsl_txenable() */ - -/* mgsl_txabort() abort send HDLC frame - * - * Arguments: info pointer to device instance data - * Return Value: 0 if success, otherwise error code - */ -static int mgsl_txabort(struct mgsl_struct * info) -{ - unsigned long flags; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_txabort(%s)\n", __FILE__,__LINE__, - info->device_name); - - spin_lock_irqsave(&info->irq_spinlock,flags); - if ( info->tx_active && info->params.mode == MGSL_MODE_HDLC ) - { - if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE ) - usc_loopmode_cancel_transmit( info ); - else - usc_TCmd(info,TCmd_SendAbort); - } - spin_unlock_irqrestore(&info->irq_spinlock,flags); - return 0; - -} /* end of mgsl_txabort() */ - -/* mgsl_rxenable() enable or disable the receiver - * - * Arguments: info pointer to device instance data - * enable 1 = enable, 0 = disable - * Return Value: 0 if success, otherwise error code - */ -static int mgsl_rxenable(struct mgsl_struct * info, int enable) -{ - unsigned long flags; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_rxenable(%s,%d)\n", __FILE__,__LINE__, - info->device_name, enable); - - spin_lock_irqsave(&info->irq_spinlock,flags); - if ( enable ) { - if ( !info->rx_enabled ) - usc_start_receiver(info); - } else { - if ( info->rx_enabled ) - usc_stop_receiver(info); - } - spin_unlock_irqrestore(&info->irq_spinlock,flags); - return 0; - -} /* end of mgsl_rxenable() */ - -/* mgsl_wait_event() wait for specified event to occur - * - * Arguments: info pointer to device instance data - * mask pointer to bitmask of events to wait for - * Return Value: 0 if successful and bit mask updated with - * of events triggerred, - * otherwise error code - */ -static int mgsl_wait_event(struct mgsl_struct * info, int __user * mask_ptr) -{ - unsigned long flags; - int s; - int rc=0; - struct mgsl_icount cprev, cnow; - int events; - int mask; - struct _input_signal_events oldsigs, newsigs; - DECLARE_WAITQUEUE(wait, current); - - COPY_FROM_USER(rc,&mask, mask_ptr, sizeof(int)); - if (rc) { - return -EFAULT; - } - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_wait_event(%s,%d)\n", __FILE__,__LINE__, - info->device_name, mask); - - spin_lock_irqsave(&info->irq_spinlock,flags); - - /* return immediately if state matches requested events */ - usc_get_serial_signals(info); - s = info->serial_signals; - events = mask & - ( ((s & SerialSignal_DSR) ? MgslEvent_DsrActive:MgslEvent_DsrInactive) + - ((s & SerialSignal_DCD) ? MgslEvent_DcdActive:MgslEvent_DcdInactive) + - ((s & SerialSignal_CTS) ? MgslEvent_CtsActive:MgslEvent_CtsInactive) + - ((s & SerialSignal_RI) ? MgslEvent_RiActive :MgslEvent_RiInactive) ); - if (events) { - spin_unlock_irqrestore(&info->irq_spinlock,flags); - goto exit; - } - - /* save current irq counts */ - cprev = info->icount; - oldsigs = info->input_signal_events; - - /* enable hunt and idle irqs if needed */ - if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) { - u16 oldreg = usc_InReg(info,RICR); - u16 newreg = oldreg + - (mask & MgslEvent_ExitHuntMode ? RXSTATUS_EXITED_HUNT:0) + - (mask & MgslEvent_IdleReceived ? RXSTATUS_IDLE_RECEIVED:0); - if (oldreg != newreg) - usc_OutReg(info, RICR, newreg); - } - - set_current_state(TASK_INTERRUPTIBLE); - add_wait_queue(&info->event_wait_q, &wait); - - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - - for(;;) { - schedule(); - if (signal_pending(current)) { - rc = -ERESTARTSYS; - break; - } - - /* get current irq counts */ - spin_lock_irqsave(&info->irq_spinlock,flags); - cnow = info->icount; - newsigs = info->input_signal_events; - set_current_state(TASK_INTERRUPTIBLE); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - /* if no change, wait aborted for some reason */ - if (newsigs.dsr_up == oldsigs.dsr_up && - newsigs.dsr_down == oldsigs.dsr_down && - newsigs.dcd_up == oldsigs.dcd_up && - newsigs.dcd_down == oldsigs.dcd_down && - newsigs.cts_up == oldsigs.cts_up && - newsigs.cts_down == oldsigs.cts_down && - newsigs.ri_up == oldsigs.ri_up && - newsigs.ri_down == oldsigs.ri_down && - cnow.exithunt == cprev.exithunt && - cnow.rxidle == cprev.rxidle) { - rc = -EIO; - break; - } - - events = mask & - ( (newsigs.dsr_up != oldsigs.dsr_up ? MgslEvent_DsrActive:0) + - (newsigs.dsr_down != oldsigs.dsr_down ? MgslEvent_DsrInactive:0) + - (newsigs.dcd_up != oldsigs.dcd_up ? MgslEvent_DcdActive:0) + - (newsigs.dcd_down != oldsigs.dcd_down ? MgslEvent_DcdInactive:0) + - (newsigs.cts_up != oldsigs.cts_up ? MgslEvent_CtsActive:0) + - (newsigs.cts_down != oldsigs.cts_down ? MgslEvent_CtsInactive:0) + - (newsigs.ri_up != oldsigs.ri_up ? MgslEvent_RiActive:0) + - (newsigs.ri_down != oldsigs.ri_down ? MgslEvent_RiInactive:0) + - (cnow.exithunt != cprev.exithunt ? MgslEvent_ExitHuntMode:0) + - (cnow.rxidle != cprev.rxidle ? MgslEvent_IdleReceived:0) ); - if (events) - break; - - cprev = cnow; - oldsigs = newsigs; - } - - remove_wait_queue(&info->event_wait_q, &wait); - set_current_state(TASK_RUNNING); - - if (mask & (MgslEvent_ExitHuntMode + MgslEvent_IdleReceived)) { - spin_lock_irqsave(&info->irq_spinlock,flags); - if (!waitqueue_active(&info->event_wait_q)) { - /* disable enable exit hunt mode/idle rcvd IRQs */ - usc_OutReg(info, RICR, usc_InReg(info,RICR) & - ~(RXSTATUS_EXITED_HUNT + RXSTATUS_IDLE_RECEIVED)); - } - spin_unlock_irqrestore(&info->irq_spinlock,flags); - } -exit: - if ( rc == 0 ) - PUT_USER(rc, events, mask_ptr); - - return rc; - -} /* end of mgsl_wait_event() */ - -static int modem_input_wait(struct mgsl_struct *info,int arg) -{ - unsigned long flags; - int rc; - struct mgsl_icount cprev, cnow; - DECLARE_WAITQUEUE(wait, current); - - /* save current irq counts */ - spin_lock_irqsave(&info->irq_spinlock,flags); - cprev = info->icount; - add_wait_queue(&info->status_event_wait_q, &wait); - set_current_state(TASK_INTERRUPTIBLE); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - for(;;) { - schedule(); - if (signal_pending(current)) { - rc = -ERESTARTSYS; - break; - } - - /* get new irq counts */ - spin_lock_irqsave(&info->irq_spinlock,flags); - cnow = info->icount; - set_current_state(TASK_INTERRUPTIBLE); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - /* if no change, wait aborted for some reason */ - if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr && - cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) { - rc = -EIO; - break; - } - - /* check for change in caller specified modem input */ - if ((arg & TIOCM_RNG && cnow.rng != cprev.rng) || - (arg & TIOCM_DSR && cnow.dsr != cprev.dsr) || - (arg & TIOCM_CD && cnow.dcd != cprev.dcd) || - (arg & TIOCM_CTS && cnow.cts != cprev.cts)) { - rc = 0; - break; - } - - cprev = cnow; - } - remove_wait_queue(&info->status_event_wait_q, &wait); - set_current_state(TASK_RUNNING); - return rc; -} - -/* return the state of the serial control and status signals - */ -static int tiocmget(struct tty_struct *tty, struct file *file) -{ - struct mgsl_struct *info = tty->driver_data; - unsigned int result; - unsigned long flags; - - spin_lock_irqsave(&info->irq_spinlock,flags); - usc_get_serial_signals(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - result = ((info->serial_signals & SerialSignal_RTS) ? TIOCM_RTS:0) + - ((info->serial_signals & SerialSignal_DTR) ? TIOCM_DTR:0) + - ((info->serial_signals & SerialSignal_DCD) ? TIOCM_CAR:0) + - ((info->serial_signals & SerialSignal_RI) ? TIOCM_RNG:0) + - ((info->serial_signals & SerialSignal_DSR) ? TIOCM_DSR:0) + - ((info->serial_signals & SerialSignal_CTS) ? TIOCM_CTS:0); - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):%s tiocmget() value=%08X\n", - __FILE__,__LINE__, info->device_name, result ); - return result; -} - -/* set modem control signals (DTR/RTS) - */ -static int tiocmset(struct tty_struct *tty, struct file *file, - unsigned int set, unsigned int clear) -{ - struct mgsl_struct *info = tty->driver_data; - unsigned long flags; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):%s tiocmset(%x,%x)\n", - __FILE__,__LINE__,info->device_name, set, clear); - - if (set & TIOCM_RTS) - info->serial_signals |= SerialSignal_RTS; - if (set & TIOCM_DTR) - info->serial_signals |= SerialSignal_DTR; - if (clear & TIOCM_RTS) - info->serial_signals &= ~SerialSignal_RTS; - if (clear & TIOCM_DTR) - info->serial_signals &= ~SerialSignal_DTR; - - spin_lock_irqsave(&info->irq_spinlock,flags); - usc_set_serial_signals(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - return 0; -} - -/* mgsl_break() Set or clear transmit break condition - * - * Arguments: tty pointer to tty instance data - * break_state -1=set break condition, 0=clear - * Return Value: error code - */ -static int mgsl_break(struct tty_struct *tty, int break_state) -{ - struct mgsl_struct * info = tty->driver_data; - unsigned long flags; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_break(%s,%d)\n", - __FILE__,__LINE__, info->device_name, break_state); - - if (mgsl_paranoia_check(info, tty->name, "mgsl_break")) - return -EINVAL; - - spin_lock_irqsave(&info->irq_spinlock,flags); - if (break_state == -1) - usc_OutReg(info,IOCR,(u16)(usc_InReg(info,IOCR) | BIT7)); - else - usc_OutReg(info,IOCR,(u16)(usc_InReg(info,IOCR) & ~BIT7)); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - return 0; - -} /* end of mgsl_break() */ - -/* - * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) - * Return: write counters to the user passed counter struct - * NB: both 1->0 and 0->1 transitions are counted except for - * RI where only 0->1 is counted. - */ -static int msgl_get_icount(struct tty_struct *tty, - struct serial_icounter_struct *icount) - -{ - struct mgsl_struct * info = tty->driver_data; - struct mgsl_icount cnow; /* kernel counter temps */ - unsigned long flags; - - spin_lock_irqsave(&info->irq_spinlock,flags); - cnow = info->icount; - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - icount->cts = cnow.cts; - icount->dsr = cnow.dsr; - icount->rng = cnow.rng; - icount->dcd = cnow.dcd; - icount->rx = cnow.rx; - icount->tx = cnow.tx; - icount->frame = cnow.frame; - icount->overrun = cnow.overrun; - icount->parity = cnow.parity; - icount->brk = cnow.brk; - icount->buf_overrun = cnow.buf_overrun; - return 0; -} - -/* mgsl_ioctl() Service an IOCTL request - * - * Arguments: - * - * tty pointer to tty instance data - * file pointer to associated file object for device - * cmd IOCTL command code - * arg command argument/context - * - * Return Value: 0 if success, otherwise error code - */ -static int mgsl_ioctl(struct tty_struct *tty, struct file * file, - unsigned int cmd, unsigned long arg) -{ - struct mgsl_struct * info = tty->driver_data; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_ioctl %s cmd=%08X\n", __FILE__,__LINE__, - info->device_name, cmd ); - - if (mgsl_paranoia_check(info, tty->name, "mgsl_ioctl")) - return -ENODEV; - - if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) && - (cmd != TIOCMIWAIT)) { - if (tty->flags & (1 << TTY_IO_ERROR)) - return -EIO; - } - - return mgsl_ioctl_common(info, cmd, arg); -} - -static int mgsl_ioctl_common(struct mgsl_struct *info, unsigned int cmd, unsigned long arg) -{ - void __user *argp = (void __user *)arg; - - switch (cmd) { - case MGSL_IOCGPARAMS: - return mgsl_get_params(info, argp); - case MGSL_IOCSPARAMS: - return mgsl_set_params(info, argp); - case MGSL_IOCGTXIDLE: - return mgsl_get_txidle(info, argp); - case MGSL_IOCSTXIDLE: - return mgsl_set_txidle(info,(int)arg); - case MGSL_IOCTXENABLE: - return mgsl_txenable(info,(int)arg); - case MGSL_IOCRXENABLE: - return mgsl_rxenable(info,(int)arg); - case MGSL_IOCTXABORT: - return mgsl_txabort(info); - case MGSL_IOCGSTATS: - return mgsl_get_stats(info, argp); - case MGSL_IOCWAITEVENT: - return mgsl_wait_event(info, argp); - case MGSL_IOCLOOPTXDONE: - return mgsl_loopmode_send_done(info); - /* Wait for modem input (DCD,RI,DSR,CTS) change - * as specified by mask in arg (TIOCM_RNG/DSR/CD/CTS) - */ - case TIOCMIWAIT: - return modem_input_wait(info,(int)arg); - - default: - return -ENOIOCTLCMD; - } - return 0; -} - -/* mgsl_set_termios() - * - * Set new termios settings - * - * Arguments: - * - * tty pointer to tty structure - * termios pointer to buffer to hold returned old termios - * - * Return Value: None - */ -static void mgsl_set_termios(struct tty_struct *tty, struct ktermios *old_termios) -{ - struct mgsl_struct *info = tty->driver_data; - unsigned long flags; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_set_termios %s\n", __FILE__,__LINE__, - tty->driver->name ); - - mgsl_change_params(info); - - /* Handle transition to B0 status */ - if (old_termios->c_cflag & CBAUD && - !(tty->termios->c_cflag & CBAUD)) { - info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); - spin_lock_irqsave(&info->irq_spinlock,flags); - usc_set_serial_signals(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - } - - /* Handle transition away from B0 status */ - if (!(old_termios->c_cflag & CBAUD) && - tty->termios->c_cflag & CBAUD) { - info->serial_signals |= SerialSignal_DTR; - if (!(tty->termios->c_cflag & CRTSCTS) || - !test_bit(TTY_THROTTLED, &tty->flags)) { - info->serial_signals |= SerialSignal_RTS; - } - spin_lock_irqsave(&info->irq_spinlock,flags); - usc_set_serial_signals(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - } - - /* Handle turning off CRTSCTS */ - if (old_termios->c_cflag & CRTSCTS && - !(tty->termios->c_cflag & CRTSCTS)) { - tty->hw_stopped = 0; - mgsl_start(tty); - } - -} /* end of mgsl_set_termios() */ - -/* mgsl_close() - * - * Called when port is closed. Wait for remaining data to be - * sent. Disable port and free resources. - * - * Arguments: - * - * tty pointer to open tty structure - * filp pointer to open file object - * - * Return Value: None - */ -static void mgsl_close(struct tty_struct *tty, struct file * filp) -{ - struct mgsl_struct * info = tty->driver_data; - - if (mgsl_paranoia_check(info, tty->name, "mgsl_close")) - return; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_close(%s) entry, count=%d\n", - __FILE__,__LINE__, info->device_name, info->port.count); - - if (tty_port_close_start(&info->port, tty, filp) == 0) - goto cleanup; - - mutex_lock(&info->port.mutex); - if (info->port.flags & ASYNC_INITIALIZED) - mgsl_wait_until_sent(tty, info->timeout); - mgsl_flush_buffer(tty); - tty_ldisc_flush(tty); - shutdown(info); - mutex_unlock(&info->port.mutex); - - tty_port_close_end(&info->port, tty); - info->port.tty = NULL; -cleanup: - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_close(%s) exit, count=%d\n", __FILE__,__LINE__, - tty->driver->name, info->port.count); - -} /* end of mgsl_close() */ - -/* mgsl_wait_until_sent() - * - * Wait until the transmitter is empty. - * - * Arguments: - * - * tty pointer to tty info structure - * timeout time to wait for send completion - * - * Return Value: None - */ -static void mgsl_wait_until_sent(struct tty_struct *tty, int timeout) -{ - struct mgsl_struct * info = tty->driver_data; - unsigned long orig_jiffies, char_time; - - if (!info ) - return; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_wait_until_sent(%s) entry\n", - __FILE__,__LINE__, info->device_name ); - - if (mgsl_paranoia_check(info, tty->name, "mgsl_wait_until_sent")) - return; - - if (!(info->port.flags & ASYNC_INITIALIZED)) - goto exit; - - orig_jiffies = jiffies; - - /* Set check interval to 1/5 of estimated time to - * send a character, and make it at least 1. The check - * interval should also be less than the timeout. - * Note: use tight timings here to satisfy the NIST-PCTS. - */ - - if ( info->params.data_rate ) { - char_time = info->timeout/(32 * 5); - if (!char_time) - char_time++; - } else - char_time = 1; - - if (timeout) - char_time = min_t(unsigned long, char_time, timeout); - - if ( info->params.mode == MGSL_MODE_HDLC || - info->params.mode == MGSL_MODE_RAW ) { - while (info->tx_active) { - msleep_interruptible(jiffies_to_msecs(char_time)); - if (signal_pending(current)) - break; - if (timeout && time_after(jiffies, orig_jiffies + timeout)) - break; - } - } else { - while (!(usc_InReg(info,TCSR) & TXSTATUS_ALL_SENT) && - info->tx_enabled) { - msleep_interruptible(jiffies_to_msecs(char_time)); - if (signal_pending(current)) - break; - if (timeout && time_after(jiffies, orig_jiffies + timeout)) - break; - } - } - -exit: - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_wait_until_sent(%s) exit\n", - __FILE__,__LINE__, info->device_name ); - -} /* end of mgsl_wait_until_sent() */ - -/* mgsl_hangup() - * - * Called by tty_hangup() when a hangup is signaled. - * This is the same as to closing all open files for the port. - * - * Arguments: tty pointer to associated tty object - * Return Value: None - */ -static void mgsl_hangup(struct tty_struct *tty) -{ - struct mgsl_struct * info = tty->driver_data; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_hangup(%s)\n", - __FILE__,__LINE__, info->device_name ); - - if (mgsl_paranoia_check(info, tty->name, "mgsl_hangup")) - return; - - mgsl_flush_buffer(tty); - shutdown(info); - - info->port.count = 0; - info->port.flags &= ~ASYNC_NORMAL_ACTIVE; - info->port.tty = NULL; - - wake_up_interruptible(&info->port.open_wait); - -} /* end of mgsl_hangup() */ - -/* - * carrier_raised() - * - * Return true if carrier is raised - */ - -static int carrier_raised(struct tty_port *port) -{ - unsigned long flags; - struct mgsl_struct *info = container_of(port, struct mgsl_struct, port); - - spin_lock_irqsave(&info->irq_spinlock, flags); - usc_get_serial_signals(info); - spin_unlock_irqrestore(&info->irq_spinlock, flags); - return (info->serial_signals & SerialSignal_DCD) ? 1 : 0; -} - -static void dtr_rts(struct tty_port *port, int on) -{ - struct mgsl_struct *info = container_of(port, struct mgsl_struct, port); - unsigned long flags; - - spin_lock_irqsave(&info->irq_spinlock,flags); - if (on) - info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; - else - info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); - usc_set_serial_signals(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); -} - - -/* block_til_ready() - * - * Block the current process until the specified port - * is ready to be opened. - * - * Arguments: - * - * tty pointer to tty info structure - * filp pointer to open file object - * info pointer to device instance data - * - * Return Value: 0 if success, otherwise error code - */ -static int block_til_ready(struct tty_struct *tty, struct file * filp, - struct mgsl_struct *info) -{ - DECLARE_WAITQUEUE(wait, current); - int retval; - bool do_clocal = false; - bool extra_count = false; - unsigned long flags; - int dcd; - struct tty_port *port = &info->port; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):block_til_ready on %s\n", - __FILE__,__LINE__, tty->driver->name ); - - if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){ - /* nonblock mode is set or port is not enabled */ - port->flags |= ASYNC_NORMAL_ACTIVE; - return 0; - } - - if (tty->termios->c_cflag & CLOCAL) - do_clocal = true; - - /* Wait for carrier detect and the line to become - * free (i.e., not in use by the callout). While we are in - * this loop, port->count is dropped by one, so that - * mgsl_close() knows when to free things. We restore it upon - * exit, either normal or abnormal. - */ - - retval = 0; - add_wait_queue(&port->open_wait, &wait); - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):block_til_ready before block on %s count=%d\n", - __FILE__,__LINE__, tty->driver->name, port->count ); - - spin_lock_irqsave(&info->irq_spinlock, flags); - if (!tty_hung_up_p(filp)) { - extra_count = true; - port->count--; - } - spin_unlock_irqrestore(&info->irq_spinlock, flags); - port->blocked_open++; - - while (1) { - if (tty->termios->c_cflag & CBAUD) - tty_port_raise_dtr_rts(port); - - set_current_state(TASK_INTERRUPTIBLE); - - if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){ - retval = (port->flags & ASYNC_HUP_NOTIFY) ? - -EAGAIN : -ERESTARTSYS; - break; - } - - dcd = tty_port_carrier_raised(&info->port); - - if (!(port->flags & ASYNC_CLOSING) && (do_clocal || dcd)) - break; - - if (signal_pending(current)) { - retval = -ERESTARTSYS; - break; - } - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):block_til_ready blocking on %s count=%d\n", - __FILE__,__LINE__, tty->driver->name, port->count ); - - tty_unlock(); - schedule(); - tty_lock(); - } - - set_current_state(TASK_RUNNING); - remove_wait_queue(&port->open_wait, &wait); - - /* FIXME: Racy on hangup during close wait */ - if (extra_count) - port->count++; - port->blocked_open--; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):block_til_ready after blocking on %s count=%d\n", - __FILE__,__LINE__, tty->driver->name, port->count ); - - if (!retval) - port->flags |= ASYNC_NORMAL_ACTIVE; - - return retval; - -} /* end of block_til_ready() */ - -/* mgsl_open() - * - * Called when a port is opened. Init and enable port. - * Perform serial-specific initialization for the tty structure. - * - * Arguments: tty pointer to tty info structure - * filp associated file pointer - * - * Return Value: 0 if success, otherwise error code - */ -static int mgsl_open(struct tty_struct *tty, struct file * filp) -{ - struct mgsl_struct *info; - int retval, line; - unsigned long flags; - - /* verify range of specified line number */ - line = tty->index; - if ((line < 0) || (line >= mgsl_device_count)) { - printk("%s(%d):mgsl_open with invalid line #%d.\n", - __FILE__,__LINE__,line); - return -ENODEV; - } - - /* find the info structure for the specified line */ - info = mgsl_device_list; - while(info && info->line != line) - info = info->next_device; - if (mgsl_paranoia_check(info, tty->name, "mgsl_open")) - return -ENODEV; - - tty->driver_data = info; - info->port.tty = tty; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_open(%s), old ref count = %d\n", - __FILE__,__LINE__,tty->driver->name, info->port.count); - - /* If port is closing, signal caller to try again */ - if (tty_hung_up_p(filp) || info->port.flags & ASYNC_CLOSING){ - if (info->port.flags & ASYNC_CLOSING) - interruptible_sleep_on(&info->port.close_wait); - retval = ((info->port.flags & ASYNC_HUP_NOTIFY) ? - -EAGAIN : -ERESTARTSYS); - goto cleanup; - } - - info->port.tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0; - - spin_lock_irqsave(&info->netlock, flags); - if (info->netcount) { - retval = -EBUSY; - spin_unlock_irqrestore(&info->netlock, flags); - goto cleanup; - } - info->port.count++; - spin_unlock_irqrestore(&info->netlock, flags); - - if (info->port.count == 1) { - /* 1st open on this device, init hardware */ - retval = startup(info); - if (retval < 0) - goto cleanup; - } - - retval = block_til_ready(tty, filp, info); - if (retval) { - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):block_til_ready(%s) returned %d\n", - __FILE__,__LINE__, info->device_name, retval); - goto cleanup; - } - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s(%d):mgsl_open(%s) success\n", - __FILE__,__LINE__, info->device_name); - retval = 0; - -cleanup: - if (retval) { - if (tty->count == 1) - info->port.tty = NULL; /* tty layer will release tty struct */ - if(info->port.count) - info->port.count--; - } - - return retval; - -} /* end of mgsl_open() */ - -/* - * /proc fs routines.... - */ - -static inline void line_info(struct seq_file *m, struct mgsl_struct *info) -{ - char stat_buf[30]; - unsigned long flags; - - if (info->bus_type == MGSL_BUS_TYPE_PCI) { - seq_printf(m, "%s:PCI io:%04X irq:%d mem:%08X lcr:%08X", - info->device_name, info->io_base, info->irq_level, - info->phys_memory_base, info->phys_lcr_base); - } else { - seq_printf(m, "%s:(E)ISA io:%04X irq:%d dma:%d", - info->device_name, info->io_base, - info->irq_level, info->dma_level); - } - - /* output current serial signal states */ - spin_lock_irqsave(&info->irq_spinlock,flags); - usc_get_serial_signals(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - stat_buf[0] = 0; - stat_buf[1] = 0; - if (info->serial_signals & SerialSignal_RTS) - strcat(stat_buf, "|RTS"); - if (info->serial_signals & SerialSignal_CTS) - strcat(stat_buf, "|CTS"); - if (info->serial_signals & SerialSignal_DTR) - strcat(stat_buf, "|DTR"); - if (info->serial_signals & SerialSignal_DSR) - strcat(stat_buf, "|DSR"); - if (info->serial_signals & SerialSignal_DCD) - strcat(stat_buf, "|CD"); - if (info->serial_signals & SerialSignal_RI) - strcat(stat_buf, "|RI"); - - if (info->params.mode == MGSL_MODE_HDLC || - info->params.mode == MGSL_MODE_RAW ) { - seq_printf(m, " HDLC txok:%d rxok:%d", - info->icount.txok, info->icount.rxok); - if (info->icount.txunder) - seq_printf(m, " txunder:%d", info->icount.txunder); - if (info->icount.txabort) - seq_printf(m, " txabort:%d", info->icount.txabort); - if (info->icount.rxshort) - seq_printf(m, " rxshort:%d", info->icount.rxshort); - if (info->icount.rxlong) - seq_printf(m, " rxlong:%d", info->icount.rxlong); - if (info->icount.rxover) - seq_printf(m, " rxover:%d", info->icount.rxover); - if (info->icount.rxcrc) - seq_printf(m, " rxcrc:%d", info->icount.rxcrc); - } else { - seq_printf(m, " ASYNC tx:%d rx:%d", - info->icount.tx, info->icount.rx); - if (info->icount.frame) - seq_printf(m, " fe:%d", info->icount.frame); - if (info->icount.parity) - seq_printf(m, " pe:%d", info->icount.parity); - if (info->icount.brk) - seq_printf(m, " brk:%d", info->icount.brk); - if (info->icount.overrun) - seq_printf(m, " oe:%d", info->icount.overrun); - } - - /* Append serial signal status to end */ - seq_printf(m, " %s\n", stat_buf+1); - - seq_printf(m, "txactive=%d bh_req=%d bh_run=%d pending_bh=%x\n", - info->tx_active,info->bh_requested,info->bh_running, - info->pending_bh); - - spin_lock_irqsave(&info->irq_spinlock,flags); - { - u16 Tcsr = usc_InReg( info, TCSR ); - u16 Tdmr = usc_InDmaReg( info, TDMR ); - u16 Ticr = usc_InReg( info, TICR ); - u16 Rscr = usc_InReg( info, RCSR ); - u16 Rdmr = usc_InDmaReg( info, RDMR ); - u16 Ricr = usc_InReg( info, RICR ); - u16 Icr = usc_InReg( info, ICR ); - u16 Dccr = usc_InReg( info, DCCR ); - u16 Tmr = usc_InReg( info, TMR ); - u16 Tccr = usc_InReg( info, TCCR ); - u16 Ccar = inw( info->io_base + CCAR ); - seq_printf(m, "tcsr=%04X tdmr=%04X ticr=%04X rcsr=%04X rdmr=%04X\n" - "ricr=%04X icr =%04X dccr=%04X tmr=%04X tccr=%04X ccar=%04X\n", - Tcsr,Tdmr,Ticr,Rscr,Rdmr,Ricr,Icr,Dccr,Tmr,Tccr,Ccar ); - } - spin_unlock_irqrestore(&info->irq_spinlock,flags); -} - -/* Called to print information about devices */ -static int mgsl_proc_show(struct seq_file *m, void *v) -{ - struct mgsl_struct *info; - - seq_printf(m, "synclink driver:%s\n", driver_version); - - info = mgsl_device_list; - while( info ) { - line_info(m, info); - info = info->next_device; - } - return 0; -} - -static int mgsl_proc_open(struct inode *inode, struct file *file) -{ - return single_open(file, mgsl_proc_show, NULL); -} - -static const struct file_operations mgsl_proc_fops = { - .owner = THIS_MODULE, - .open = mgsl_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -/* mgsl_allocate_dma_buffers() - * - * Allocate and format DMA buffers (ISA adapter) - * or format shared memory buffers (PCI adapter). - * - * Arguments: info pointer to device instance data - * Return Value: 0 if success, otherwise error - */ -static int mgsl_allocate_dma_buffers(struct mgsl_struct *info) -{ - unsigned short BuffersPerFrame; - - info->last_mem_alloc = 0; - - /* Calculate the number of DMA buffers necessary to hold the */ - /* largest allowable frame size. Note: If the max frame size is */ - /* not an even multiple of the DMA buffer size then we need to */ - /* round the buffer count per frame up one. */ - - BuffersPerFrame = (unsigned short)(info->max_frame_size/DMABUFFERSIZE); - if ( info->max_frame_size % DMABUFFERSIZE ) - BuffersPerFrame++; - - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { - /* - * The PCI adapter has 256KBytes of shared memory to use. - * This is 64 PAGE_SIZE buffers. - * - * The first page is used for padding at this time so the - * buffer list does not begin at offset 0 of the PCI - * adapter's shared memory. - * - * The 2nd page is used for the buffer list. A 4K buffer - * list can hold 128 DMA_BUFFER structures at 32 bytes - * each. - * - * This leaves 62 4K pages. - * - * The next N pages are used for transmit frame(s). We - * reserve enough 4K page blocks to hold the required - * number of transmit dma buffers (num_tx_dma_buffers), - * each of MaxFrameSize size. - * - * Of the remaining pages (62-N), determine how many can - * be used to receive full MaxFrameSize inbound frames - */ - info->tx_buffer_count = info->num_tx_dma_buffers * BuffersPerFrame; - info->rx_buffer_count = 62 - info->tx_buffer_count; - } else { - /* Calculate the number of PAGE_SIZE buffers needed for */ - /* receive and transmit DMA buffers. */ - - - /* Calculate the number of DMA buffers necessary to */ - /* hold 7 max size receive frames and one max size transmit frame. */ - /* The receive buffer count is bumped by one so we avoid an */ - /* End of List condition if all receive buffers are used when */ - /* using linked list DMA buffers. */ - - info->tx_buffer_count = info->num_tx_dma_buffers * BuffersPerFrame; - info->rx_buffer_count = (BuffersPerFrame * MAXRXFRAMES) + 6; - - /* - * limit total TxBuffers & RxBuffers to 62 4K total - * (ala PCI Allocation) - */ - - if ( (info->tx_buffer_count + info->rx_buffer_count) > 62 ) - info->rx_buffer_count = 62 - info->tx_buffer_count; - - } - - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk("%s(%d):Allocating %d TX and %d RX DMA buffers.\n", - __FILE__,__LINE__, info->tx_buffer_count,info->rx_buffer_count); - - if ( mgsl_alloc_buffer_list_memory( info ) < 0 || - mgsl_alloc_frame_memory(info, info->rx_buffer_list, info->rx_buffer_count) < 0 || - mgsl_alloc_frame_memory(info, info->tx_buffer_list, info->tx_buffer_count) < 0 || - mgsl_alloc_intermediate_rxbuffer_memory(info) < 0 || - mgsl_alloc_intermediate_txbuffer_memory(info) < 0 ) { - printk("%s(%d):Can't allocate DMA buffer memory\n",__FILE__,__LINE__); - return -ENOMEM; - } - - mgsl_reset_rx_dma_buffers( info ); - mgsl_reset_tx_dma_buffers( info ); - - return 0; - -} /* end of mgsl_allocate_dma_buffers() */ - -/* - * mgsl_alloc_buffer_list_memory() - * - * Allocate a common DMA buffer for use as the - * receive and transmit buffer lists. - * - * A buffer list is a set of buffer entries where each entry contains - * a pointer to an actual buffer and a pointer to the next buffer entry - * (plus some other info about the buffer). - * - * The buffer entries for a list are built to form a circular list so - * that when the entire list has been traversed you start back at the - * beginning. - * - * This function allocates memory for just the buffer entries. - * The links (pointer to next entry) are filled in with the physical - * address of the next entry so the adapter can navigate the list - * using bus master DMA. The pointers to the actual buffers are filled - * out later when the actual buffers are allocated. - * - * Arguments: info pointer to device instance data - * Return Value: 0 if success, otherwise error - */ -static int mgsl_alloc_buffer_list_memory( struct mgsl_struct *info ) -{ - unsigned int i; - - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { - /* PCI adapter uses shared memory. */ - info->buffer_list = info->memory_base + info->last_mem_alloc; - info->buffer_list_phys = info->last_mem_alloc; - info->last_mem_alloc += BUFFERLISTSIZE; - } else { - /* ISA adapter uses system memory. */ - /* The buffer lists are allocated as a common buffer that both */ - /* the processor and adapter can access. This allows the driver to */ - /* inspect portions of the buffer while other portions are being */ - /* updated by the adapter using Bus Master DMA. */ - - info->buffer_list = dma_alloc_coherent(NULL, BUFFERLISTSIZE, &info->buffer_list_dma_addr, GFP_KERNEL); - if (info->buffer_list == NULL) - return -ENOMEM; - info->buffer_list_phys = (u32)(info->buffer_list_dma_addr); - } - - /* We got the memory for the buffer entry lists. */ - /* Initialize the memory block to all zeros. */ - memset( info->buffer_list, 0, BUFFERLISTSIZE ); - - /* Save virtual address pointers to the receive and */ - /* transmit buffer lists. (Receive 1st). These pointers will */ - /* be used by the processor to access the lists. */ - info->rx_buffer_list = (DMABUFFERENTRY *)info->buffer_list; - info->tx_buffer_list = (DMABUFFERENTRY *)info->buffer_list; - info->tx_buffer_list += info->rx_buffer_count; - - /* - * Build the links for the buffer entry lists such that - * two circular lists are built. (Transmit and Receive). - * - * Note: the links are physical addresses - * which are read by the adapter to determine the next - * buffer entry to use. - */ - - for ( i = 0; i < info->rx_buffer_count; i++ ) { - /* calculate and store physical address of this buffer entry */ - info->rx_buffer_list[i].phys_entry = - info->buffer_list_phys + (i * sizeof(DMABUFFERENTRY)); - - /* calculate and store physical address of */ - /* next entry in cirular list of entries */ - - info->rx_buffer_list[i].link = info->buffer_list_phys; - - if ( i < info->rx_buffer_count - 1 ) - info->rx_buffer_list[i].link += (i + 1) * sizeof(DMABUFFERENTRY); - } - - for ( i = 0; i < info->tx_buffer_count; i++ ) { - /* calculate and store physical address of this buffer entry */ - info->tx_buffer_list[i].phys_entry = info->buffer_list_phys + - ((info->rx_buffer_count + i) * sizeof(DMABUFFERENTRY)); - - /* calculate and store physical address of */ - /* next entry in cirular list of entries */ - - info->tx_buffer_list[i].link = info->buffer_list_phys + - info->rx_buffer_count * sizeof(DMABUFFERENTRY); - - if ( i < info->tx_buffer_count - 1 ) - info->tx_buffer_list[i].link += (i + 1) * sizeof(DMABUFFERENTRY); - } - - return 0; - -} /* end of mgsl_alloc_buffer_list_memory() */ - -/* Free DMA buffers allocated for use as the - * receive and transmit buffer lists. - * Warning: - * - * The data transfer buffers associated with the buffer list - * MUST be freed before freeing the buffer list itself because - * the buffer list contains the information necessary to free - * the individual buffers! - */ -static void mgsl_free_buffer_list_memory( struct mgsl_struct *info ) -{ - if (info->buffer_list && info->bus_type != MGSL_BUS_TYPE_PCI) - dma_free_coherent(NULL, BUFFERLISTSIZE, info->buffer_list, info->buffer_list_dma_addr); - - info->buffer_list = NULL; - info->rx_buffer_list = NULL; - info->tx_buffer_list = NULL; - -} /* end of mgsl_free_buffer_list_memory() */ - -/* - * mgsl_alloc_frame_memory() - * - * Allocate the frame DMA buffers used by the specified buffer list. - * Each DMA buffer will be one memory page in size. This is necessary - * because memory can fragment enough that it may be impossible - * contiguous pages. - * - * Arguments: - * - * info pointer to device instance data - * BufferList pointer to list of buffer entries - * Buffercount count of buffer entries in buffer list - * - * Return Value: 0 if success, otherwise -ENOMEM - */ -static int mgsl_alloc_frame_memory(struct mgsl_struct *info,DMABUFFERENTRY *BufferList,int Buffercount) -{ - int i; - u32 phys_addr; - - /* Allocate page sized buffers for the receive buffer list */ - - for ( i = 0; i < Buffercount; i++ ) { - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { - /* PCI adapter uses shared memory buffers. */ - BufferList[i].virt_addr = info->memory_base + info->last_mem_alloc; - phys_addr = info->last_mem_alloc; - info->last_mem_alloc += DMABUFFERSIZE; - } else { - /* ISA adapter uses system memory. */ - BufferList[i].virt_addr = dma_alloc_coherent(NULL, DMABUFFERSIZE, &BufferList[i].dma_addr, GFP_KERNEL); - if (BufferList[i].virt_addr == NULL) - return -ENOMEM; - phys_addr = (u32)(BufferList[i].dma_addr); - } - BufferList[i].phys_addr = phys_addr; - } - - return 0; - -} /* end of mgsl_alloc_frame_memory() */ - -/* - * mgsl_free_frame_memory() - * - * Free the buffers associated with - * each buffer entry of a buffer list. - * - * Arguments: - * - * info pointer to device instance data - * BufferList pointer to list of buffer entries - * Buffercount count of buffer entries in buffer list - * - * Return Value: None - */ -static void mgsl_free_frame_memory(struct mgsl_struct *info, DMABUFFERENTRY *BufferList, int Buffercount) -{ - int i; - - if ( BufferList ) { - for ( i = 0 ; i < Buffercount ; i++ ) { - if ( BufferList[i].virt_addr ) { - if ( info->bus_type != MGSL_BUS_TYPE_PCI ) - dma_free_coherent(NULL, DMABUFFERSIZE, BufferList[i].virt_addr, BufferList[i].dma_addr); - BufferList[i].virt_addr = NULL; - } - } - } - -} /* end of mgsl_free_frame_memory() */ - -/* mgsl_free_dma_buffers() - * - * Free DMA buffers - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void mgsl_free_dma_buffers( struct mgsl_struct *info ) -{ - mgsl_free_frame_memory( info, info->rx_buffer_list, info->rx_buffer_count ); - mgsl_free_frame_memory( info, info->tx_buffer_list, info->tx_buffer_count ); - mgsl_free_buffer_list_memory( info ); - -} /* end of mgsl_free_dma_buffers() */ - - -/* - * mgsl_alloc_intermediate_rxbuffer_memory() - * - * Allocate a buffer large enough to hold max_frame_size. This buffer - * is used to pass an assembled frame to the line discipline. - * - * Arguments: - * - * info pointer to device instance data - * - * Return Value: 0 if success, otherwise -ENOMEM - */ -static int mgsl_alloc_intermediate_rxbuffer_memory(struct mgsl_struct *info) -{ - info->intermediate_rxbuffer = kmalloc(info->max_frame_size, GFP_KERNEL | GFP_DMA); - if ( info->intermediate_rxbuffer == NULL ) - return -ENOMEM; - - return 0; - -} /* end of mgsl_alloc_intermediate_rxbuffer_memory() */ - -/* - * mgsl_free_intermediate_rxbuffer_memory() - * - * - * Arguments: - * - * info pointer to device instance data - * - * Return Value: None - */ -static void mgsl_free_intermediate_rxbuffer_memory(struct mgsl_struct *info) -{ - kfree(info->intermediate_rxbuffer); - info->intermediate_rxbuffer = NULL; - -} /* end of mgsl_free_intermediate_rxbuffer_memory() */ - -/* - * mgsl_alloc_intermediate_txbuffer_memory() - * - * Allocate intermdiate transmit buffer(s) large enough to hold max_frame_size. - * This buffer is used to load transmit frames into the adapter's dma transfer - * buffers when there is sufficient space. - * - * Arguments: - * - * info pointer to device instance data - * - * Return Value: 0 if success, otherwise -ENOMEM - */ -static int mgsl_alloc_intermediate_txbuffer_memory(struct mgsl_struct *info) -{ - int i; - - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk("%s %s(%d) allocating %d tx holding buffers\n", - info->device_name, __FILE__,__LINE__,info->num_tx_holding_buffers); - - memset(info->tx_holding_buffers,0,sizeof(info->tx_holding_buffers)); - - for ( i=0; i<info->num_tx_holding_buffers; ++i) { - info->tx_holding_buffers[i].buffer = - kmalloc(info->max_frame_size, GFP_KERNEL); - if (info->tx_holding_buffers[i].buffer == NULL) { - for (--i; i >= 0; i--) { - kfree(info->tx_holding_buffers[i].buffer); - info->tx_holding_buffers[i].buffer = NULL; - } - return -ENOMEM; - } - } - - return 0; - -} /* end of mgsl_alloc_intermediate_txbuffer_memory() */ - -/* - * mgsl_free_intermediate_txbuffer_memory() - * - * - * Arguments: - * - * info pointer to device instance data - * - * Return Value: None - */ -static void mgsl_free_intermediate_txbuffer_memory(struct mgsl_struct *info) -{ - int i; - - for ( i=0; i<info->num_tx_holding_buffers; ++i ) { - kfree(info->tx_holding_buffers[i].buffer); - info->tx_holding_buffers[i].buffer = NULL; - } - - info->get_tx_holding_index = 0; - info->put_tx_holding_index = 0; - info->tx_holding_count = 0; - -} /* end of mgsl_free_intermediate_txbuffer_memory() */ - - -/* - * load_next_tx_holding_buffer() - * - * attempts to load the next buffered tx request into the - * tx dma buffers - * - * Arguments: - * - * info pointer to device instance data - * - * Return Value: true if next buffered tx request loaded - * into adapter's tx dma buffer, - * false otherwise - */ -static bool load_next_tx_holding_buffer(struct mgsl_struct *info) -{ - bool ret = false; - - if ( info->tx_holding_count ) { - /* determine if we have enough tx dma buffers - * to accommodate the next tx frame - */ - struct tx_holding_buffer *ptx = - &info->tx_holding_buffers[info->get_tx_holding_index]; - int num_free = num_free_tx_dma_buffers(info); - int num_needed = ptx->buffer_size / DMABUFFERSIZE; - if ( ptx->buffer_size % DMABUFFERSIZE ) - ++num_needed; - - if (num_needed <= num_free) { - info->xmit_cnt = ptx->buffer_size; - mgsl_load_tx_dma_buffer(info,ptx->buffer,ptx->buffer_size); - - --info->tx_holding_count; - if ( ++info->get_tx_holding_index >= info->num_tx_holding_buffers) - info->get_tx_holding_index=0; - - /* restart transmit timer */ - mod_timer(&info->tx_timer, jiffies + msecs_to_jiffies(5000)); - - ret = true; - } - } - - return ret; -} - -/* - * save_tx_buffer_request() - * - * attempt to store transmit frame request for later transmission - * - * Arguments: - * - * info pointer to device instance data - * Buffer pointer to buffer containing frame to load - * BufferSize size in bytes of frame in Buffer - * - * Return Value: 1 if able to store, 0 otherwise - */ -static int save_tx_buffer_request(struct mgsl_struct *info,const char *Buffer, unsigned int BufferSize) -{ - struct tx_holding_buffer *ptx; - - if ( info->tx_holding_count >= info->num_tx_holding_buffers ) { - return 0; /* all buffers in use */ - } - - ptx = &info->tx_holding_buffers[info->put_tx_holding_index]; - ptx->buffer_size = BufferSize; - memcpy( ptx->buffer, Buffer, BufferSize); - - ++info->tx_holding_count; - if ( ++info->put_tx_holding_index >= info->num_tx_holding_buffers) - info->put_tx_holding_index=0; - - return 1; -} - -static int mgsl_claim_resources(struct mgsl_struct *info) -{ - if (request_region(info->io_base,info->io_addr_size,"synclink") == NULL) { - printk( "%s(%d):I/O address conflict on device %s Addr=%08X\n", - __FILE__,__LINE__,info->device_name, info->io_base); - return -ENODEV; - } - info->io_addr_requested = true; - - if ( request_irq(info->irq_level,mgsl_interrupt,info->irq_flags, - info->device_name, info ) < 0 ) { - printk( "%s(%d):Cant request interrupt on device %s IRQ=%d\n", - __FILE__,__LINE__,info->device_name, info->irq_level ); - goto errout; - } - info->irq_requested = true; - - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { - if (request_mem_region(info->phys_memory_base,0x40000,"synclink") == NULL) { - printk( "%s(%d):mem addr conflict device %s Addr=%08X\n", - __FILE__,__LINE__,info->device_name, info->phys_memory_base); - goto errout; - } - info->shared_mem_requested = true; - if (request_mem_region(info->phys_lcr_base + info->lcr_offset,128,"synclink") == NULL) { - printk( "%s(%d):lcr mem addr conflict device %s Addr=%08X\n", - __FILE__,__LINE__,info->device_name, info->phys_lcr_base + info->lcr_offset); - goto errout; - } - info->lcr_mem_requested = true; - - info->memory_base = ioremap_nocache(info->phys_memory_base, - 0x40000); - if (!info->memory_base) { - printk( "%s(%d):Cant map shared memory on device %s MemAddr=%08X\n", - __FILE__,__LINE__,info->device_name, info->phys_memory_base ); - goto errout; - } - - if ( !mgsl_memory_test(info) ) { - printk( "%s(%d):Failed shared memory test %s MemAddr=%08X\n", - __FILE__,__LINE__,info->device_name, info->phys_memory_base ); - goto errout; - } - - info->lcr_base = ioremap_nocache(info->phys_lcr_base, - PAGE_SIZE); - if (!info->lcr_base) { - printk( "%s(%d):Cant map LCR memory on device %s MemAddr=%08X\n", - __FILE__,__LINE__,info->device_name, info->phys_lcr_base ); - goto errout; - } - info->lcr_base += info->lcr_offset; - - } else { - /* claim DMA channel */ - - if (request_dma(info->dma_level,info->device_name) < 0){ - printk( "%s(%d):Cant request DMA channel on device %s DMA=%d\n", - __FILE__,__LINE__,info->device_name, info->dma_level ); - mgsl_release_resources( info ); - return -ENODEV; - } - info->dma_requested = true; - - /* ISA adapter uses bus master DMA */ - set_dma_mode(info->dma_level,DMA_MODE_CASCADE); - enable_dma(info->dma_level); - } - - if ( mgsl_allocate_dma_buffers(info) < 0 ) { - printk( "%s(%d):Cant allocate DMA buffers on device %s DMA=%d\n", - __FILE__,__LINE__,info->device_name, info->dma_level ); - goto errout; - } - - return 0; -errout: - mgsl_release_resources(info); - return -ENODEV; - -} /* end of mgsl_claim_resources() */ - -static void mgsl_release_resources(struct mgsl_struct *info) -{ - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk( "%s(%d):mgsl_release_resources(%s) entry\n", - __FILE__,__LINE__,info->device_name ); - - if ( info->irq_requested ) { - free_irq(info->irq_level, info); - info->irq_requested = false; - } - if ( info->dma_requested ) { - disable_dma(info->dma_level); - free_dma(info->dma_level); - info->dma_requested = false; - } - mgsl_free_dma_buffers(info); - mgsl_free_intermediate_rxbuffer_memory(info); - mgsl_free_intermediate_txbuffer_memory(info); - - if ( info->io_addr_requested ) { - release_region(info->io_base,info->io_addr_size); - info->io_addr_requested = false; - } - if ( info->shared_mem_requested ) { - release_mem_region(info->phys_memory_base,0x40000); - info->shared_mem_requested = false; - } - if ( info->lcr_mem_requested ) { - release_mem_region(info->phys_lcr_base + info->lcr_offset,128); - info->lcr_mem_requested = false; - } - if (info->memory_base){ - iounmap(info->memory_base); - info->memory_base = NULL; - } - if (info->lcr_base){ - iounmap(info->lcr_base - info->lcr_offset); - info->lcr_base = NULL; - } - - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk( "%s(%d):mgsl_release_resources(%s) exit\n", - __FILE__,__LINE__,info->device_name ); - -} /* end of mgsl_release_resources() */ - -/* mgsl_add_device() - * - * Add the specified device instance data structure to the - * global linked list of devices and increment the device count. - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void mgsl_add_device( struct mgsl_struct *info ) -{ - info->next_device = NULL; - info->line = mgsl_device_count; - sprintf(info->device_name,"ttySL%d",info->line); - - if (info->line < MAX_TOTAL_DEVICES) { - if (maxframe[info->line]) - info->max_frame_size = maxframe[info->line]; - - if (txdmabufs[info->line]) { - info->num_tx_dma_buffers = txdmabufs[info->line]; - if (info->num_tx_dma_buffers < 1) - info->num_tx_dma_buffers = 1; - } - - if (txholdbufs[info->line]) { - info->num_tx_holding_buffers = txholdbufs[info->line]; - if (info->num_tx_holding_buffers < 1) - info->num_tx_holding_buffers = 1; - else if (info->num_tx_holding_buffers > MAX_TX_HOLDING_BUFFERS) - info->num_tx_holding_buffers = MAX_TX_HOLDING_BUFFERS; - } - } - - mgsl_device_count++; - - if ( !mgsl_device_list ) - mgsl_device_list = info; - else { - struct mgsl_struct *current_dev = mgsl_device_list; - while( current_dev->next_device ) - current_dev = current_dev->next_device; - current_dev->next_device = info; - } - - if ( info->max_frame_size < 4096 ) - info->max_frame_size = 4096; - else if ( info->max_frame_size > 65535 ) - info->max_frame_size = 65535; - - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { - printk( "SyncLink PCI v%d %s: IO=%04X IRQ=%d Mem=%08X,%08X MaxFrameSize=%u\n", - info->hw_version + 1, info->device_name, info->io_base, info->irq_level, - info->phys_memory_base, info->phys_lcr_base, - info->max_frame_size ); - } else { - printk( "SyncLink ISA %s: IO=%04X IRQ=%d DMA=%d MaxFrameSize=%u\n", - info->device_name, info->io_base, info->irq_level, info->dma_level, - info->max_frame_size ); - } - -#if SYNCLINK_GENERIC_HDLC - hdlcdev_init(info); -#endif - -} /* end of mgsl_add_device() */ - -static const struct tty_port_operations mgsl_port_ops = { - .carrier_raised = carrier_raised, - .dtr_rts = dtr_rts, -}; - - -/* mgsl_allocate_device() - * - * Allocate and initialize a device instance structure - * - * Arguments: none - * Return Value: pointer to mgsl_struct if success, otherwise NULL - */ -static struct mgsl_struct* mgsl_allocate_device(void) -{ - struct mgsl_struct *info; - - info = kzalloc(sizeof(struct mgsl_struct), - GFP_KERNEL); - - if (!info) { - printk("Error can't allocate device instance data\n"); - } else { - tty_port_init(&info->port); - info->port.ops = &mgsl_port_ops; - info->magic = MGSL_MAGIC; - INIT_WORK(&info->task, mgsl_bh_handler); - info->max_frame_size = 4096; - info->port.close_delay = 5*HZ/10; - info->port.closing_wait = 30*HZ; - init_waitqueue_head(&info->status_event_wait_q); - init_waitqueue_head(&info->event_wait_q); - spin_lock_init(&info->irq_spinlock); - spin_lock_init(&info->netlock); - memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS)); - info->idle_mode = HDLC_TXIDLE_FLAGS; - info->num_tx_dma_buffers = 1; - info->num_tx_holding_buffers = 0; - } - - return info; - -} /* end of mgsl_allocate_device()*/ - -static const struct tty_operations mgsl_ops = { - .open = mgsl_open, - .close = mgsl_close, - .write = mgsl_write, - .put_char = mgsl_put_char, - .flush_chars = mgsl_flush_chars, - .write_room = mgsl_write_room, - .chars_in_buffer = mgsl_chars_in_buffer, - .flush_buffer = mgsl_flush_buffer, - .ioctl = mgsl_ioctl, - .throttle = mgsl_throttle, - .unthrottle = mgsl_unthrottle, - .send_xchar = mgsl_send_xchar, - .break_ctl = mgsl_break, - .wait_until_sent = mgsl_wait_until_sent, - .set_termios = mgsl_set_termios, - .stop = mgsl_stop, - .start = mgsl_start, - .hangup = mgsl_hangup, - .tiocmget = tiocmget, - .tiocmset = tiocmset, - .get_icount = msgl_get_icount, - .proc_fops = &mgsl_proc_fops, -}; - -/* - * perform tty device initialization - */ -static int mgsl_init_tty(void) -{ - int rc; - - serial_driver = alloc_tty_driver(128); - if (!serial_driver) - return -ENOMEM; - - serial_driver->owner = THIS_MODULE; - serial_driver->driver_name = "synclink"; - serial_driver->name = "ttySL"; - serial_driver->major = ttymajor; - serial_driver->minor_start = 64; - serial_driver->type = TTY_DRIVER_TYPE_SERIAL; - serial_driver->subtype = SERIAL_TYPE_NORMAL; - serial_driver->init_termios = tty_std_termios; - serial_driver->init_termios.c_cflag = - B9600 | CS8 | CREAD | HUPCL | CLOCAL; - serial_driver->init_termios.c_ispeed = 9600; - serial_driver->init_termios.c_ospeed = 9600; - serial_driver->flags = TTY_DRIVER_REAL_RAW; - tty_set_operations(serial_driver, &mgsl_ops); - if ((rc = tty_register_driver(serial_driver)) < 0) { - printk("%s(%d):Couldn't register serial driver\n", - __FILE__,__LINE__); - put_tty_driver(serial_driver); - serial_driver = NULL; - return rc; - } - - printk("%s %s, tty major#%d\n", - driver_name, driver_version, - serial_driver->major); - return 0; -} - -/* enumerate user specified ISA adapters - */ -static void mgsl_enum_isa_devices(void) -{ - struct mgsl_struct *info; - int i; - - /* Check for user specified ISA devices */ - - for (i=0 ;(i < MAX_ISA_DEVICES) && io[i] && irq[i]; i++){ - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk("ISA device specified io=%04X,irq=%d,dma=%d\n", - io[i], irq[i], dma[i] ); - - info = mgsl_allocate_device(); - if ( !info ) { - /* error allocating device instance data */ - if ( debug_level >= DEBUG_LEVEL_ERROR ) - printk( "can't allocate device instance data.\n"); - continue; - } - - /* Copy user configuration info to device instance data */ - info->io_base = (unsigned int)io[i]; - info->irq_level = (unsigned int)irq[i]; - info->irq_level = irq_canonicalize(info->irq_level); - info->dma_level = (unsigned int)dma[i]; - info->bus_type = MGSL_BUS_TYPE_ISA; - info->io_addr_size = 16; - info->irq_flags = 0; - - mgsl_add_device( info ); - } -} - -static void synclink_cleanup(void) -{ - int rc; - struct mgsl_struct *info; - struct mgsl_struct *tmp; - - printk("Unloading %s: %s\n", driver_name, driver_version); - - if (serial_driver) { - if ((rc = tty_unregister_driver(serial_driver))) - printk("%s(%d) failed to unregister tty driver err=%d\n", - __FILE__,__LINE__,rc); - put_tty_driver(serial_driver); - } - - info = mgsl_device_list; - while(info) { -#if SYNCLINK_GENERIC_HDLC - hdlcdev_exit(info); -#endif - mgsl_release_resources(info); - tmp = info; - info = info->next_device; - kfree(tmp); - } - - if (pci_registered) - pci_unregister_driver(&synclink_pci_driver); -} - -static int __init synclink_init(void) -{ - int rc; - - if (break_on_load) { - mgsl_get_text_ptr(); - BREAKPOINT(); - } - - printk("%s %s\n", driver_name, driver_version); - - mgsl_enum_isa_devices(); - if ((rc = pci_register_driver(&synclink_pci_driver)) < 0) - printk("%s:failed to register PCI driver, error=%d\n",__FILE__,rc); - else - pci_registered = true; - - if ((rc = mgsl_init_tty()) < 0) - goto error; - - return 0; - -error: - synclink_cleanup(); - return rc; -} - -static void __exit synclink_exit(void) -{ - synclink_cleanup(); -} - -module_init(synclink_init); -module_exit(synclink_exit); - -/* - * usc_RTCmd() - * - * Issue a USC Receive/Transmit command to the - * Channel Command/Address Register (CCAR). - * - * Notes: - * - * The command is encoded in the most significant 5 bits <15..11> - * of the CCAR value. Bits <10..7> of the CCAR must be preserved - * and Bits <6..0> must be written as zeros. - * - * Arguments: - * - * info pointer to device information structure - * Cmd command mask (use symbolic macros) - * - * Return Value: - * - * None - */ -static void usc_RTCmd( struct mgsl_struct *info, u16 Cmd ) -{ - /* output command to CCAR in bits <15..11> */ - /* preserve bits <10..7>, bits <6..0> must be zero */ - - outw( Cmd + info->loopback_bits, info->io_base + CCAR ); - - /* Read to flush write to CCAR */ - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - inw( info->io_base + CCAR ); - -} /* end of usc_RTCmd() */ - -/* - * usc_DmaCmd() - * - * Issue a DMA command to the DMA Command/Address Register (DCAR). - * - * Arguments: - * - * info pointer to device information structure - * Cmd DMA command mask (usc_DmaCmd_XX Macros) - * - * Return Value: - * - * None - */ -static void usc_DmaCmd( struct mgsl_struct *info, u16 Cmd ) -{ - /* write command mask to DCAR */ - outw( Cmd + info->mbre_bit, info->io_base ); - - /* Read to flush write to DCAR */ - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - inw( info->io_base ); - -} /* end of usc_DmaCmd() */ - -/* - * usc_OutDmaReg() - * - * Write a 16-bit value to a USC DMA register - * - * Arguments: - * - * info pointer to device info structure - * RegAddr register address (number) for write - * RegValue 16-bit value to write to register - * - * Return Value: - * - * None - * - */ -static void usc_OutDmaReg( struct mgsl_struct *info, u16 RegAddr, u16 RegValue ) -{ - /* Note: The DCAR is located at the adapter base address */ - /* Note: must preserve state of BIT8 in DCAR */ - - outw( RegAddr + info->mbre_bit, info->io_base ); - outw( RegValue, info->io_base ); - - /* Read to flush write to DCAR */ - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - inw( info->io_base ); - -} /* end of usc_OutDmaReg() */ - -/* - * usc_InDmaReg() - * - * Read a 16-bit value from a DMA register - * - * Arguments: - * - * info pointer to device info structure - * RegAddr register address (number) to read from - * - * Return Value: - * - * The 16-bit value read from register - * - */ -static u16 usc_InDmaReg( struct mgsl_struct *info, u16 RegAddr ) -{ - /* Note: The DCAR is located at the adapter base address */ - /* Note: must preserve state of BIT8 in DCAR */ - - outw( RegAddr + info->mbre_bit, info->io_base ); - return inw( info->io_base ); - -} /* end of usc_InDmaReg() */ - -/* - * - * usc_OutReg() - * - * Write a 16-bit value to a USC serial channel register - * - * Arguments: - * - * info pointer to device info structure - * RegAddr register address (number) to write to - * RegValue 16-bit value to write to register - * - * Return Value: - * - * None - * - */ -static void usc_OutReg( struct mgsl_struct *info, u16 RegAddr, u16 RegValue ) -{ - outw( RegAddr + info->loopback_bits, info->io_base + CCAR ); - outw( RegValue, info->io_base + CCAR ); - - /* Read to flush write to CCAR */ - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - inw( info->io_base + CCAR ); - -} /* end of usc_OutReg() */ - -/* - * usc_InReg() - * - * Reads a 16-bit value from a USC serial channel register - * - * Arguments: - * - * info pointer to device extension - * RegAddr register address (number) to read from - * - * Return Value: - * - * 16-bit value read from register - */ -static u16 usc_InReg( struct mgsl_struct *info, u16 RegAddr ) -{ - outw( RegAddr + info->loopback_bits, info->io_base + CCAR ); - return inw( info->io_base + CCAR ); - -} /* end of usc_InReg() */ - -/* usc_set_sdlc_mode() - * - * Set up the adapter for SDLC DMA communications. - * - * Arguments: info pointer to device instance data - * Return Value: NONE - */ -static void usc_set_sdlc_mode( struct mgsl_struct *info ) -{ - u16 RegValue; - bool PreSL1660; - - /* - * determine if the IUSC on the adapter is pre-SL1660. If - * not, take advantage of the UnderWait feature of more - * modern chips. If an underrun occurs and this bit is set, - * the transmitter will idle the programmed idle pattern - * until the driver has time to service the underrun. Otherwise, - * the dma controller may get the cycles previously requested - * and begin transmitting queued tx data. - */ - usc_OutReg(info,TMCR,0x1f); - RegValue=usc_InReg(info,TMDR); - PreSL1660 = (RegValue == IUSC_PRE_SL1660); - - if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE ) - { - /* - ** Channel Mode Register (CMR) - ** - ** <15..14> 10 Tx Sub Modes, Send Flag on Underrun - ** <13> 0 0 = Transmit Disabled (initially) - ** <12> 0 1 = Consecutive Idles share common 0 - ** <11..8> 1110 Transmitter Mode = HDLC/SDLC Loop - ** <7..4> 0000 Rx Sub Modes, addr/ctrl field handling - ** <3..0> 0110 Receiver Mode = HDLC/SDLC - ** - ** 1000 1110 0000 0110 = 0x8e06 - */ - RegValue = 0x8e06; - - /*-------------------------------------------------- - * ignore user options for UnderRun Actions and - * preambles - *--------------------------------------------------*/ - } - else - { - /* Channel mode Register (CMR) - * - * <15..14> 00 Tx Sub modes, Underrun Action - * <13> 0 1 = Send Preamble before opening flag - * <12> 0 1 = Consecutive Idles share common 0 - * <11..8> 0110 Transmitter mode = HDLC/SDLC - * <7..4> 0000 Rx Sub modes, addr/ctrl field handling - * <3..0> 0110 Receiver mode = HDLC/SDLC - * - * 0000 0110 0000 0110 = 0x0606 - */ - if (info->params.mode == MGSL_MODE_RAW) { - RegValue = 0x0001; /* Set Receive mode = external sync */ - - usc_OutReg( info, IOCR, /* Set IOCR DCD is RxSync Detect Input */ - (unsigned short)((usc_InReg(info, IOCR) & ~(BIT13|BIT12)) | BIT12)); - - /* - * TxSubMode: - * CMR <15> 0 Don't send CRC on Tx Underrun - * CMR <14> x undefined - * CMR <13> 0 Send preamble before openning sync - * CMR <12> 0 Send 8-bit syncs, 1=send Syncs per TxLength - * - * TxMode: - * CMR <11-8) 0100 MonoSync - * - * 0x00 0100 xxxx xxxx 04xx - */ - RegValue |= 0x0400; - } - else { - - RegValue = 0x0606; - - if ( info->params.flags & HDLC_FLAG_UNDERRUN_ABORT15 ) - RegValue |= BIT14; - else if ( info->params.flags & HDLC_FLAG_UNDERRUN_FLAG ) - RegValue |= BIT15; - else if ( info->params.flags & HDLC_FLAG_UNDERRUN_CRC ) - RegValue |= BIT15 + BIT14; - } - - if ( info->params.preamble != HDLC_PREAMBLE_PATTERN_NONE ) - RegValue |= BIT13; - } - - if ( info->params.mode == MGSL_MODE_HDLC && - (info->params.flags & HDLC_FLAG_SHARE_ZERO) ) - RegValue |= BIT12; - - if ( info->params.addr_filter != 0xff ) - { - /* set up receive address filtering */ - usc_OutReg( info, RSR, info->params.addr_filter ); - RegValue |= BIT4; - } - - usc_OutReg( info, CMR, RegValue ); - info->cmr_value = RegValue; - - /* Receiver mode Register (RMR) - * - * <15..13> 000 encoding - * <12..11> 00 FCS = 16bit CRC CCITT (x15 + x12 + x5 + 1) - * <10> 1 1 = Set CRC to all 1s (use for SDLC/HDLC) - * <9> 0 1 = Include Receive chars in CRC - * <8> 1 1 = Use Abort/PE bit as abort indicator - * <7..6> 00 Even parity - * <5> 0 parity disabled - * <4..2> 000 Receive Char Length = 8 bits - * <1..0> 00 Disable Receiver - * - * 0000 0101 0000 0000 = 0x0500 - */ - - RegValue = 0x0500; - - switch ( info->params.encoding ) { - case HDLC_ENCODING_NRZB: RegValue |= BIT13; break; - case HDLC_ENCODING_NRZI_MARK: RegValue |= BIT14; break; - case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT14 + BIT13; break; - case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT15; break; - case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT15 + BIT13; break; - case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14; break; - case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14 + BIT13; break; - } - - if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_16_CCITT ) - RegValue |= BIT9; - else if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_32_CCITT ) - RegValue |= ( BIT12 | BIT10 | BIT9 ); - - usc_OutReg( info, RMR, RegValue ); - - /* Set the Receive count Limit Register (RCLR) to 0xffff. */ - /* When an opening flag of an SDLC frame is recognized the */ - /* Receive Character count (RCC) is loaded with the value in */ - /* RCLR. The RCC is decremented for each received byte. The */ - /* value of RCC is stored after the closing flag of the frame */ - /* allowing the frame size to be computed. */ - - usc_OutReg( info, RCLR, RCLRVALUE ); - - usc_RCmd( info, RCmd_SelectRicrdma_level ); - - /* Receive Interrupt Control Register (RICR) - * - * <15..8> ? RxFIFO DMA Request Level - * <7> 0 Exited Hunt IA (Interrupt Arm) - * <6> 0 Idle Received IA - * <5> 0 Break/Abort IA - * <4> 0 Rx Bound IA - * <3> 1 Queued status reflects oldest 2 bytes in FIFO - * <2> 0 Abort/PE IA - * <1> 1 Rx Overrun IA - * <0> 0 Select TC0 value for readback - * - * 0000 0000 0000 1000 = 0x000a - */ - - /* Carry over the Exit Hunt and Idle Received bits */ - /* in case they have been armed by usc_ArmEvents. */ - - RegValue = usc_InReg( info, RICR ) & 0xc0; - - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - usc_OutReg( info, RICR, (u16)(0x030a | RegValue) ); - else - usc_OutReg( info, RICR, (u16)(0x140a | RegValue) ); - - /* Unlatch all Rx status bits and clear Rx status IRQ Pending */ - - usc_UnlatchRxstatusBits( info, RXSTATUS_ALL ); - usc_ClearIrqPendingBits( info, RECEIVE_STATUS ); - - /* Transmit mode Register (TMR) - * - * <15..13> 000 encoding - * <12..11> 00 FCS = 16bit CRC CCITT (x15 + x12 + x5 + 1) - * <10> 1 1 = Start CRC as all 1s (use for SDLC/HDLC) - * <9> 0 1 = Tx CRC Enabled - * <8> 0 1 = Append CRC to end of transmit frame - * <7..6> 00 Transmit parity Even - * <5> 0 Transmit parity Disabled - * <4..2> 000 Tx Char Length = 8 bits - * <1..0> 00 Disable Transmitter - * - * 0000 0100 0000 0000 = 0x0400 - */ - - RegValue = 0x0400; - - switch ( info->params.encoding ) { - case HDLC_ENCODING_NRZB: RegValue |= BIT13; break; - case HDLC_ENCODING_NRZI_MARK: RegValue |= BIT14; break; - case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT14 + BIT13; break; - case HDLC_ENCODING_BIPHASE_MARK: RegValue |= BIT15; break; - case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT15 + BIT13; break; - case HDLC_ENCODING_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14; break; - case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT15 + BIT14 + BIT13; break; - } - - if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_16_CCITT ) - RegValue |= BIT9 + BIT8; - else if ( (info->params.crc_type & HDLC_CRC_MASK) == HDLC_CRC_32_CCITT ) - RegValue |= ( BIT12 | BIT10 | BIT9 | BIT8); - - usc_OutReg( info, TMR, RegValue ); - - usc_set_txidle( info ); - - - usc_TCmd( info, TCmd_SelectTicrdma_level ); - - /* Transmit Interrupt Control Register (TICR) - * - * <15..8> ? Transmit FIFO DMA Level - * <7> 0 Present IA (Interrupt Arm) - * <6> 0 Idle Sent IA - * <5> 1 Abort Sent IA - * <4> 1 EOF/EOM Sent IA - * <3> 0 CRC Sent IA - * <2> 1 1 = Wait for SW Trigger to Start Frame - * <1> 1 Tx Underrun IA - * <0> 0 TC0 constant on read back - * - * 0000 0000 0011 0110 = 0x0036 - */ - - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - usc_OutReg( info, TICR, 0x0736 ); - else - usc_OutReg( info, TICR, 0x1436 ); - - usc_UnlatchTxstatusBits( info, TXSTATUS_ALL ); - usc_ClearIrqPendingBits( info, TRANSMIT_STATUS ); - - /* - ** Transmit Command/Status Register (TCSR) - ** - ** <15..12> 0000 TCmd - ** <11> 0/1 UnderWait - ** <10..08> 000 TxIdle - ** <7> x PreSent - ** <6> x IdleSent - ** <5> x AbortSent - ** <4> x EOF/EOM Sent - ** <3> x CRC Sent - ** <2> x All Sent - ** <1> x TxUnder - ** <0> x TxEmpty - ** - ** 0000 0000 0000 0000 = 0x0000 - */ - info->tcsr_value = 0; - - if ( !PreSL1660 ) - info->tcsr_value |= TCSR_UNDERWAIT; - - usc_OutReg( info, TCSR, info->tcsr_value ); - - /* Clock mode Control Register (CMCR) - * - * <15..14> 00 counter 1 Source = Disabled - * <13..12> 00 counter 0 Source = Disabled - * <11..10> 11 BRG1 Input is TxC Pin - * <9..8> 11 BRG0 Input is TxC Pin - * <7..6> 01 DPLL Input is BRG1 Output - * <5..3> XXX TxCLK comes from Port 0 - * <2..0> XXX RxCLK comes from Port 1 - * - * 0000 1111 0111 0111 = 0x0f77 - */ - - RegValue = 0x0f40; - - if ( info->params.flags & HDLC_FLAG_RXC_DPLL ) - RegValue |= 0x0003; /* RxCLK from DPLL */ - else if ( info->params.flags & HDLC_FLAG_RXC_BRG ) - RegValue |= 0x0004; /* RxCLK from BRG0 */ - else if ( info->params.flags & HDLC_FLAG_RXC_TXCPIN) - RegValue |= 0x0006; /* RxCLK from TXC Input */ - else - RegValue |= 0x0007; /* RxCLK from Port1 */ - - if ( info->params.flags & HDLC_FLAG_TXC_DPLL ) - RegValue |= 0x0018; /* TxCLK from DPLL */ - else if ( info->params.flags & HDLC_FLAG_TXC_BRG ) - RegValue |= 0x0020; /* TxCLK from BRG0 */ - else if ( info->params.flags & HDLC_FLAG_TXC_RXCPIN) - RegValue |= 0x0038; /* RxCLK from TXC Input */ - else - RegValue |= 0x0030; /* TxCLK from Port0 */ - - usc_OutReg( info, CMCR, RegValue ); - - - /* Hardware Configuration Register (HCR) - * - * <15..14> 00 CTR0 Divisor:00=32,01=16,10=8,11=4 - * <13> 0 CTR1DSel:0=CTR0Div determines CTR0Div - * <12> 0 CVOK:0=report code violation in biphase - * <11..10> 00 DPLL Divisor:00=32,01=16,10=8,11=4 - * <9..8> XX DPLL mode:00=disable,01=NRZ,10=Biphase,11=Biphase Level - * <7..6> 00 reserved - * <5> 0 BRG1 mode:0=continuous,1=single cycle - * <4> X BRG1 Enable - * <3..2> 00 reserved - * <1> 0 BRG0 mode:0=continuous,1=single cycle - * <0> 0 BRG0 Enable - */ - - RegValue = 0x0000; - - if ( info->params.flags & (HDLC_FLAG_RXC_DPLL + HDLC_FLAG_TXC_DPLL) ) { - u32 XtalSpeed; - u32 DpllDivisor; - u16 Tc; - - /* DPLL is enabled. Use BRG1 to provide continuous reference clock */ - /* for DPLL. DPLL mode in HCR is dependent on the encoding used. */ - - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - XtalSpeed = 11059200; - else - XtalSpeed = 14745600; - - if ( info->params.flags & HDLC_FLAG_DPLL_DIV16 ) { - DpllDivisor = 16; - RegValue |= BIT10; - } - else if ( info->params.flags & HDLC_FLAG_DPLL_DIV8 ) { - DpllDivisor = 8; - RegValue |= BIT11; - } - else - DpllDivisor = 32; - - /* Tc = (Xtal/Speed) - 1 */ - /* If twice the remainder of (Xtal/Speed) is greater than Speed */ - /* then rounding up gives a more precise time constant. Instead */ - /* of rounding up and then subtracting 1 we just don't subtract */ - /* the one in this case. */ - - /*-------------------------------------------------- - * ejz: for DPLL mode, application should use the - * same clock speed as the partner system, even - * though clocking is derived from the input RxData. - * In case the user uses a 0 for the clock speed, - * default to 0xffffffff and don't try to divide by - * zero - *--------------------------------------------------*/ - if ( info->params.clock_speed ) - { - Tc = (u16)((XtalSpeed/DpllDivisor)/info->params.clock_speed); - if ( !((((XtalSpeed/DpllDivisor) % info->params.clock_speed) * 2) - / info->params.clock_speed) ) - Tc--; - } - else - Tc = -1; - - - /* Write 16-bit Time Constant for BRG1 */ - usc_OutReg( info, TC1R, Tc ); - - RegValue |= BIT4; /* enable BRG1 */ - - switch ( info->params.encoding ) { - case HDLC_ENCODING_NRZ: - case HDLC_ENCODING_NRZB: - case HDLC_ENCODING_NRZI_MARK: - case HDLC_ENCODING_NRZI_SPACE: RegValue |= BIT8; break; - case HDLC_ENCODING_BIPHASE_MARK: - case HDLC_ENCODING_BIPHASE_SPACE: RegValue |= BIT9; break; - case HDLC_ENCODING_BIPHASE_LEVEL: - case HDLC_ENCODING_DIFF_BIPHASE_LEVEL: RegValue |= BIT9 + BIT8; break; - } - } - - usc_OutReg( info, HCR, RegValue ); - - - /* Channel Control/status Register (CCSR) - * - * <15> X RCC FIFO Overflow status (RO) - * <14> X RCC FIFO Not Empty status (RO) - * <13> 0 1 = Clear RCC FIFO (WO) - * <12> X DPLL Sync (RW) - * <11> X DPLL 2 Missed Clocks status (RO) - * <10> X DPLL 1 Missed Clock status (RO) - * <9..8> 00 DPLL Resync on rising and falling edges (RW) - * <7> X SDLC Loop On status (RO) - * <6> X SDLC Loop Send status (RO) - * <5> 1 Bypass counters for TxClk and RxClk (RW) - * <4..2> 000 Last Char of SDLC frame has 8 bits (RW) - * <1..0> 00 reserved - * - * 0000 0000 0010 0000 = 0x0020 - */ - - usc_OutReg( info, CCSR, 0x1020 ); - - - if ( info->params.flags & HDLC_FLAG_AUTO_CTS ) { - usc_OutReg( info, SICR, - (u16)(usc_InReg(info,SICR) | SICR_CTS_INACTIVE) ); - } - - - /* enable Master Interrupt Enable bit (MIE) */ - usc_EnableMasterIrqBit( info ); - - usc_ClearIrqPendingBits( info, RECEIVE_STATUS + RECEIVE_DATA + - TRANSMIT_STATUS + TRANSMIT_DATA + MISC); - - /* arm RCC underflow interrupt */ - usc_OutReg(info, SICR, (u16)(usc_InReg(info,SICR) | BIT3)); - usc_EnableInterrupts(info, MISC); - - info->mbre_bit = 0; - outw( 0, info->io_base ); /* clear Master Bus Enable (DCAR) */ - usc_DmaCmd( info, DmaCmd_ResetAllChannels ); /* disable both DMA channels */ - info->mbre_bit = BIT8; - outw( BIT8, info->io_base ); /* set Master Bus Enable (DCAR) */ - - if (info->bus_type == MGSL_BUS_TYPE_ISA) { - /* Enable DMAEN (Port 7, Bit 14) */ - /* This connects the DMA request signal to the ISA bus */ - usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT15) & ~BIT14)); - } - - /* DMA Control Register (DCR) - * - * <15..14> 10 Priority mode = Alternating Tx/Rx - * 01 Rx has priority - * 00 Tx has priority - * - * <13> 1 Enable Priority Preempt per DCR<15..14> - * (WARNING DCR<11..10> must be 00 when this is 1) - * 0 Choose activate channel per DCR<11..10> - * - * <12> 0 Little Endian for Array/List - * <11..10> 00 Both Channels can use each bus grant - * <9..6> 0000 reserved - * <5> 0 7 CLK - Minimum Bus Re-request Interval - * <4> 0 1 = drive D/C and S/D pins - * <3> 1 1 = Add one wait state to all DMA cycles. - * <2> 0 1 = Strobe /UAS on every transfer. - * <1..0> 11 Addr incrementing only affects LS24 bits - * - * 0110 0000 0000 1011 = 0x600b - */ - - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { - /* PCI adapter does not need DMA wait state */ - usc_OutDmaReg( info, DCR, 0xa00b ); - } - else - usc_OutDmaReg( info, DCR, 0x800b ); - - - /* Receive DMA mode Register (RDMR) - * - * <15..14> 11 DMA mode = Linked List Buffer mode - * <13> 1 RSBinA/L = store Rx status Block in Arrary/List entry - * <12> 1 Clear count of List Entry after fetching - * <11..10> 00 Address mode = Increment - * <9> 1 Terminate Buffer on RxBound - * <8> 0 Bus Width = 16bits - * <7..0> ? status Bits (write as 0s) - * - * 1111 0010 0000 0000 = 0xf200 - */ - - usc_OutDmaReg( info, RDMR, 0xf200 ); - - - /* Transmit DMA mode Register (TDMR) - * - * <15..14> 11 DMA mode = Linked List Buffer mode - * <13> 1 TCBinA/L = fetch Tx Control Block from List entry - * <12> 1 Clear count of List Entry after fetching - * <11..10> 00 Address mode = Increment - * <9> 1 Terminate Buffer on end of frame - * <8> 0 Bus Width = 16bits - * <7..0> ? status Bits (Read Only so write as 0) - * - * 1111 0010 0000 0000 = 0xf200 - */ - - usc_OutDmaReg( info, TDMR, 0xf200 ); - - - /* DMA Interrupt Control Register (DICR) - * - * <15> 1 DMA Interrupt Enable - * <14> 0 1 = Disable IEO from USC - * <13> 0 1 = Don't provide vector during IntAck - * <12> 1 1 = Include status in Vector - * <10..2> 0 reserved, Must be 0s - * <1> 0 1 = Rx DMA Interrupt Enabled - * <0> 0 1 = Tx DMA Interrupt Enabled - * - * 1001 0000 0000 0000 = 0x9000 - */ - - usc_OutDmaReg( info, DICR, 0x9000 ); - - usc_InDmaReg( info, RDMR ); /* clear pending receive DMA IRQ bits */ - usc_InDmaReg( info, TDMR ); /* clear pending transmit DMA IRQ bits */ - usc_OutDmaReg( info, CDIR, 0x0303 ); /* clear IUS and Pending for Tx and Rx */ - - /* Channel Control Register (CCR) - * - * <15..14> 10 Use 32-bit Tx Control Blocks (TCBs) - * <13> 0 Trigger Tx on SW Command Disabled - * <12> 0 Flag Preamble Disabled - * <11..10> 00 Preamble Length - * <9..8> 00 Preamble Pattern - * <7..6> 10 Use 32-bit Rx status Blocks (RSBs) - * <5> 0 Trigger Rx on SW Command Disabled - * <4..0> 0 reserved - * - * 1000 0000 1000 0000 = 0x8080 - */ - - RegValue = 0x8080; - - switch ( info->params.preamble_length ) { - case HDLC_PREAMBLE_LENGTH_16BITS: RegValue |= BIT10; break; - case HDLC_PREAMBLE_LENGTH_32BITS: RegValue |= BIT11; break; - case HDLC_PREAMBLE_LENGTH_64BITS: RegValue |= BIT11 + BIT10; break; - } - - switch ( info->params.preamble ) { - case HDLC_PREAMBLE_PATTERN_FLAGS: RegValue |= BIT8 + BIT12; break; - case HDLC_PREAMBLE_PATTERN_ONES: RegValue |= BIT8; break; - case HDLC_PREAMBLE_PATTERN_10: RegValue |= BIT9; break; - case HDLC_PREAMBLE_PATTERN_01: RegValue |= BIT9 + BIT8; break; - } - - usc_OutReg( info, CCR, RegValue ); - - - /* - * Burst/Dwell Control Register - * - * <15..8> 0x20 Maximum number of transfers per bus grant - * <7..0> 0x00 Maximum number of clock cycles per bus grant - */ - - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { - /* don't limit bus occupancy on PCI adapter */ - usc_OutDmaReg( info, BDCR, 0x0000 ); - } - else - usc_OutDmaReg( info, BDCR, 0x2000 ); - - usc_stop_transmitter(info); - usc_stop_receiver(info); - -} /* end of usc_set_sdlc_mode() */ - -/* usc_enable_loopback() - * - * Set the 16C32 for internal loopback mode. - * The TxCLK and RxCLK signals are generated from the BRG0 and - * the TxD is looped back to the RxD internally. - * - * Arguments: info pointer to device instance data - * enable 1 = enable loopback, 0 = disable - * Return Value: None - */ -static void usc_enable_loopback(struct mgsl_struct *info, int enable) -{ - if (enable) { - /* blank external TXD output */ - usc_OutReg(info,IOCR,usc_InReg(info,IOCR) | (BIT7+BIT6)); - - /* Clock mode Control Register (CMCR) - * - * <15..14> 00 counter 1 Disabled - * <13..12> 00 counter 0 Disabled - * <11..10> 11 BRG1 Input is TxC Pin - * <9..8> 11 BRG0 Input is TxC Pin - * <7..6> 01 DPLL Input is BRG1 Output - * <5..3> 100 TxCLK comes from BRG0 - * <2..0> 100 RxCLK comes from BRG0 - * - * 0000 1111 0110 0100 = 0x0f64 - */ - - usc_OutReg( info, CMCR, 0x0f64 ); - - /* Write 16-bit Time Constant for BRG0 */ - /* use clock speed if available, otherwise use 8 for diagnostics */ - if (info->params.clock_speed) { - if (info->bus_type == MGSL_BUS_TYPE_PCI) - usc_OutReg(info, TC0R, (u16)((11059200/info->params.clock_speed)-1)); - else - usc_OutReg(info, TC0R, (u16)((14745600/info->params.clock_speed)-1)); - } else - usc_OutReg(info, TC0R, (u16)8); - - /* Hardware Configuration Register (HCR) Clear Bit 1, BRG0 - mode = Continuous Set Bit 0 to enable BRG0. */ - usc_OutReg( info, HCR, (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) ); - - /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */ - usc_OutReg(info, IOCR, (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004)); - - /* set Internal Data loopback mode */ - info->loopback_bits = 0x300; - outw( 0x0300, info->io_base + CCAR ); - } else { - /* enable external TXD output */ - usc_OutReg(info,IOCR,usc_InReg(info,IOCR) & ~(BIT7+BIT6)); - - /* clear Internal Data loopback mode */ - info->loopback_bits = 0; - outw( 0,info->io_base + CCAR ); - } - -} /* end of usc_enable_loopback() */ - -/* usc_enable_aux_clock() - * - * Enabled the AUX clock output at the specified frequency. - * - * Arguments: - * - * info pointer to device extension - * data_rate data rate of clock in bits per second - * A data rate of 0 disables the AUX clock. - * - * Return Value: None - */ -static void usc_enable_aux_clock( struct mgsl_struct *info, u32 data_rate ) -{ - u32 XtalSpeed; - u16 Tc; - - if ( data_rate ) { - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - XtalSpeed = 11059200; - else - XtalSpeed = 14745600; - - - /* Tc = (Xtal/Speed) - 1 */ - /* If twice the remainder of (Xtal/Speed) is greater than Speed */ - /* then rounding up gives a more precise time constant. Instead */ - /* of rounding up and then subtracting 1 we just don't subtract */ - /* the one in this case. */ - - - Tc = (u16)(XtalSpeed/data_rate); - if ( !(((XtalSpeed % data_rate) * 2) / data_rate) ) - Tc--; - - /* Write 16-bit Time Constant for BRG0 */ - usc_OutReg( info, TC0R, Tc ); - - /* - * Hardware Configuration Register (HCR) - * Clear Bit 1, BRG0 mode = Continuous - * Set Bit 0 to enable BRG0. - */ - - usc_OutReg( info, HCR, (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) ); - - /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */ - usc_OutReg( info, IOCR, (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004) ); - } else { - /* data rate == 0 so turn off BRG0 */ - usc_OutReg( info, HCR, (u16)(usc_InReg( info, HCR ) & ~BIT0) ); - } - -} /* end of usc_enable_aux_clock() */ - -/* - * - * usc_process_rxoverrun_sync() - * - * This function processes a receive overrun by resetting the - * receive DMA buffers and issuing a Purge Rx FIFO command - * to allow the receiver to continue receiving. - * - * Arguments: - * - * info pointer to device extension - * - * Return Value: None - */ -static void usc_process_rxoverrun_sync( struct mgsl_struct *info ) -{ - int start_index; - int end_index; - int frame_start_index; - bool start_of_frame_found = false; - bool end_of_frame_found = false; - bool reprogram_dma = false; - - DMABUFFERENTRY *buffer_list = info->rx_buffer_list; - u32 phys_addr; - - usc_DmaCmd( info, DmaCmd_PauseRxChannel ); - usc_RCmd( info, RCmd_EnterHuntmode ); - usc_RTCmd( info, RTCmd_PurgeRxFifo ); - - /* CurrentRxBuffer points to the 1st buffer of the next */ - /* possibly available receive frame. */ - - frame_start_index = start_index = end_index = info->current_rx_buffer; - - /* Search for an unfinished string of buffers. This means */ - /* that a receive frame started (at least one buffer with */ - /* count set to zero) but there is no terminiting buffer */ - /* (status set to non-zero). */ - - while( !buffer_list[end_index].count ) - { - /* Count field has been reset to zero by 16C32. */ - /* This buffer is currently in use. */ - - if ( !start_of_frame_found ) - { - start_of_frame_found = true; - frame_start_index = end_index; - end_of_frame_found = false; - } - - if ( buffer_list[end_index].status ) - { - /* Status field has been set by 16C32. */ - /* This is the last buffer of a received frame. */ - - /* We want to leave the buffers for this frame intact. */ - /* Move on to next possible frame. */ - - start_of_frame_found = false; - end_of_frame_found = true; - } - - /* advance to next buffer entry in linked list */ - end_index++; - if ( end_index == info->rx_buffer_count ) - end_index = 0; - - if ( start_index == end_index ) - { - /* The entire list has been searched with all Counts == 0 and */ - /* all Status == 0. The receive buffers are */ - /* completely screwed, reset all receive buffers! */ - mgsl_reset_rx_dma_buffers( info ); - frame_start_index = 0; - start_of_frame_found = false; - reprogram_dma = true; - break; - } - } - - if ( start_of_frame_found && !end_of_frame_found ) - { - /* There is an unfinished string of receive DMA buffers */ - /* as a result of the receiver overrun. */ - - /* Reset the buffers for the unfinished frame */ - /* and reprogram the receive DMA controller to start */ - /* at the 1st buffer of unfinished frame. */ - - start_index = frame_start_index; - - do - { - *((unsigned long *)&(info->rx_buffer_list[start_index++].count)) = DMABUFFERSIZE; - - /* Adjust index for wrap around. */ - if ( start_index == info->rx_buffer_count ) - start_index = 0; - - } while( start_index != end_index ); - - reprogram_dma = true; - } - - if ( reprogram_dma ) - { - usc_UnlatchRxstatusBits(info,RXSTATUS_ALL); - usc_ClearIrqPendingBits(info, RECEIVE_DATA|RECEIVE_STATUS); - usc_UnlatchRxstatusBits(info, RECEIVE_DATA|RECEIVE_STATUS); - - usc_EnableReceiver(info,DISABLE_UNCONDITIONAL); - - /* This empties the receive FIFO and loads the RCC with RCLR */ - usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) ); - - /* program 16C32 with physical address of 1st DMA buffer entry */ - phys_addr = info->rx_buffer_list[frame_start_index].phys_entry; - usc_OutDmaReg( info, NRARL, (u16)phys_addr ); - usc_OutDmaReg( info, NRARU, (u16)(phys_addr >> 16) ); - - usc_UnlatchRxstatusBits( info, RXSTATUS_ALL ); - usc_ClearIrqPendingBits( info, RECEIVE_DATA + RECEIVE_STATUS ); - usc_EnableInterrupts( info, RECEIVE_STATUS ); - - /* 1. Arm End of Buffer (EOB) Receive DMA Interrupt (BIT2 of RDIAR) */ - /* 2. Enable Receive DMA Interrupts (BIT1 of DICR) */ - - usc_OutDmaReg( info, RDIAR, BIT3 + BIT2 ); - usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT1) ); - usc_DmaCmd( info, DmaCmd_InitRxChannel ); - if ( info->params.flags & HDLC_FLAG_AUTO_DCD ) - usc_EnableReceiver(info,ENABLE_AUTO_DCD); - else - usc_EnableReceiver(info,ENABLE_UNCONDITIONAL); - } - else - { - /* This empties the receive FIFO and loads the RCC with RCLR */ - usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) ); - usc_RTCmd( info, RTCmd_PurgeRxFifo ); - } - -} /* end of usc_process_rxoverrun_sync() */ - -/* usc_stop_receiver() - * - * Disable USC receiver - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void usc_stop_receiver( struct mgsl_struct *info ) -{ - if (debug_level >= DEBUG_LEVEL_ISR) - printk("%s(%d):usc_stop_receiver(%s)\n", - __FILE__,__LINE__, info->device_name ); - - /* Disable receive DMA channel. */ - /* This also disables receive DMA channel interrupts */ - usc_DmaCmd( info, DmaCmd_ResetRxChannel ); - - usc_UnlatchRxstatusBits( info, RXSTATUS_ALL ); - usc_ClearIrqPendingBits( info, RECEIVE_DATA + RECEIVE_STATUS ); - usc_DisableInterrupts( info, RECEIVE_DATA + RECEIVE_STATUS ); - - usc_EnableReceiver(info,DISABLE_UNCONDITIONAL); - - /* This empties the receive FIFO and loads the RCC with RCLR */ - usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) ); - usc_RTCmd( info, RTCmd_PurgeRxFifo ); - - info->rx_enabled = false; - info->rx_overflow = false; - info->rx_rcc_underrun = false; - -} /* end of stop_receiver() */ - -/* usc_start_receiver() - * - * Enable the USC receiver - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void usc_start_receiver( struct mgsl_struct *info ) -{ - u32 phys_addr; - - if (debug_level >= DEBUG_LEVEL_ISR) - printk("%s(%d):usc_start_receiver(%s)\n", - __FILE__,__LINE__, info->device_name ); - - mgsl_reset_rx_dma_buffers( info ); - usc_stop_receiver( info ); - - usc_OutReg( info, CCSR, (u16)(usc_InReg(info,CCSR) | BIT13) ); - usc_RTCmd( info, RTCmd_PurgeRxFifo ); - - if ( info->params.mode == MGSL_MODE_HDLC || - info->params.mode == MGSL_MODE_RAW ) { - /* DMA mode Transfers */ - /* Program the DMA controller. */ - /* Enable the DMA controller end of buffer interrupt. */ - - /* program 16C32 with physical address of 1st DMA buffer entry */ - phys_addr = info->rx_buffer_list[0].phys_entry; - usc_OutDmaReg( info, NRARL, (u16)phys_addr ); - usc_OutDmaReg( info, NRARU, (u16)(phys_addr >> 16) ); - - usc_UnlatchRxstatusBits( info, RXSTATUS_ALL ); - usc_ClearIrqPendingBits( info, RECEIVE_DATA + RECEIVE_STATUS ); - usc_EnableInterrupts( info, RECEIVE_STATUS ); - - /* 1. Arm End of Buffer (EOB) Receive DMA Interrupt (BIT2 of RDIAR) */ - /* 2. Enable Receive DMA Interrupts (BIT1 of DICR) */ - - usc_OutDmaReg( info, RDIAR, BIT3 + BIT2 ); - usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT1) ); - usc_DmaCmd( info, DmaCmd_InitRxChannel ); - if ( info->params.flags & HDLC_FLAG_AUTO_DCD ) - usc_EnableReceiver(info,ENABLE_AUTO_DCD); - else - usc_EnableReceiver(info,ENABLE_UNCONDITIONAL); - } else { - usc_UnlatchRxstatusBits(info, RXSTATUS_ALL); - usc_ClearIrqPendingBits(info, RECEIVE_DATA + RECEIVE_STATUS); - usc_EnableInterrupts(info, RECEIVE_DATA); - - usc_RTCmd( info, RTCmd_PurgeRxFifo ); - usc_RCmd( info, RCmd_EnterHuntmode ); - - usc_EnableReceiver(info,ENABLE_UNCONDITIONAL); - } - - usc_OutReg( info, CCSR, 0x1020 ); - - info->rx_enabled = true; - -} /* end of usc_start_receiver() */ - -/* usc_start_transmitter() - * - * Enable the USC transmitter and send a transmit frame if - * one is loaded in the DMA buffers. - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void usc_start_transmitter( struct mgsl_struct *info ) -{ - u32 phys_addr; - unsigned int FrameSize; - - if (debug_level >= DEBUG_LEVEL_ISR) - printk("%s(%d):usc_start_transmitter(%s)\n", - __FILE__,__LINE__, info->device_name ); - - if ( info->xmit_cnt ) { - - /* If auto RTS enabled and RTS is inactive, then assert */ - /* RTS and set a flag indicating that the driver should */ - /* negate RTS when the transmission completes. */ - - info->drop_rts_on_tx_done = false; - - if ( info->params.flags & HDLC_FLAG_AUTO_RTS ) { - usc_get_serial_signals( info ); - if ( !(info->serial_signals & SerialSignal_RTS) ) { - info->serial_signals |= SerialSignal_RTS; - usc_set_serial_signals( info ); - info->drop_rts_on_tx_done = true; - } - } - - - if ( info->params.mode == MGSL_MODE_ASYNC ) { - if ( !info->tx_active ) { - usc_UnlatchTxstatusBits(info, TXSTATUS_ALL); - usc_ClearIrqPendingBits(info, TRANSMIT_STATUS + TRANSMIT_DATA); - usc_EnableInterrupts(info, TRANSMIT_DATA); - usc_load_txfifo(info); - } - } else { - /* Disable transmit DMA controller while programming. */ - usc_DmaCmd( info, DmaCmd_ResetTxChannel ); - - /* Transmit DMA buffer is loaded, so program USC */ - /* to send the frame contained in the buffers. */ - - FrameSize = info->tx_buffer_list[info->start_tx_dma_buffer].rcc; - - /* if operating in Raw sync mode, reset the rcc component - * of the tx dma buffer entry, otherwise, the serial controller - * will send a closing sync char after this count. - */ - if ( info->params.mode == MGSL_MODE_RAW ) - info->tx_buffer_list[info->start_tx_dma_buffer].rcc = 0; - - /* Program the Transmit Character Length Register (TCLR) */ - /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */ - usc_OutReg( info, TCLR, (u16)FrameSize ); - - usc_RTCmd( info, RTCmd_PurgeTxFifo ); - - /* Program the address of the 1st DMA Buffer Entry in linked list */ - phys_addr = info->tx_buffer_list[info->start_tx_dma_buffer].phys_entry; - usc_OutDmaReg( info, NTARL, (u16)phys_addr ); - usc_OutDmaReg( info, NTARU, (u16)(phys_addr >> 16) ); - - usc_UnlatchTxstatusBits( info, TXSTATUS_ALL ); - usc_ClearIrqPendingBits( info, TRANSMIT_STATUS ); - usc_EnableInterrupts( info, TRANSMIT_STATUS ); - - if ( info->params.mode == MGSL_MODE_RAW && - info->num_tx_dma_buffers > 1 ) { - /* When running external sync mode, attempt to 'stream' transmit */ - /* by filling tx dma buffers as they become available. To do this */ - /* we need to enable Tx DMA EOB Status interrupts : */ - /* */ - /* 1. Arm End of Buffer (EOB) Transmit DMA Interrupt (BIT2 of TDIAR) */ - /* 2. Enable Transmit DMA Interrupts (BIT0 of DICR) */ - - usc_OutDmaReg( info, TDIAR, BIT2|BIT3 ); - usc_OutDmaReg( info, DICR, (u16)(usc_InDmaReg(info,DICR) | BIT0) ); - } - - /* Initialize Transmit DMA Channel */ - usc_DmaCmd( info, DmaCmd_InitTxChannel ); - - usc_TCmd( info, TCmd_SendFrame ); - - mod_timer(&info->tx_timer, jiffies + - msecs_to_jiffies(5000)); - } - info->tx_active = true; - } - - if ( !info->tx_enabled ) { - info->tx_enabled = true; - if ( info->params.flags & HDLC_FLAG_AUTO_CTS ) - usc_EnableTransmitter(info,ENABLE_AUTO_CTS); - else - usc_EnableTransmitter(info,ENABLE_UNCONDITIONAL); - } - -} /* end of usc_start_transmitter() */ - -/* usc_stop_transmitter() - * - * Stops the transmitter and DMA - * - * Arguments: info pointer to device isntance data - * Return Value: None - */ -static void usc_stop_transmitter( struct mgsl_struct *info ) -{ - if (debug_level >= DEBUG_LEVEL_ISR) - printk("%s(%d):usc_stop_transmitter(%s)\n", - __FILE__,__LINE__, info->device_name ); - - del_timer(&info->tx_timer); - - usc_UnlatchTxstatusBits( info, TXSTATUS_ALL ); - usc_ClearIrqPendingBits( info, TRANSMIT_STATUS + TRANSMIT_DATA ); - usc_DisableInterrupts( info, TRANSMIT_STATUS + TRANSMIT_DATA ); - - usc_EnableTransmitter(info,DISABLE_UNCONDITIONAL); - usc_DmaCmd( info, DmaCmd_ResetTxChannel ); - usc_RTCmd( info, RTCmd_PurgeTxFifo ); - - info->tx_enabled = false; - info->tx_active = false; - -} /* end of usc_stop_transmitter() */ - -/* usc_load_txfifo() - * - * Fill the transmit FIFO until the FIFO is full or - * there is no more data to load. - * - * Arguments: info pointer to device extension (instance data) - * Return Value: None - */ -static void usc_load_txfifo( struct mgsl_struct *info ) -{ - int Fifocount; - u8 TwoBytes[2]; - - if ( !info->xmit_cnt && !info->x_char ) - return; - - /* Select transmit FIFO status readback in TICR */ - usc_TCmd( info, TCmd_SelectTicrTxFifostatus ); - - /* load the Transmit FIFO until FIFOs full or all data sent */ - - while( (Fifocount = usc_InReg(info, TICR) >> 8) && info->xmit_cnt ) { - /* there is more space in the transmit FIFO and */ - /* there is more data in transmit buffer */ - - if ( (info->xmit_cnt > 1) && (Fifocount > 1) && !info->x_char ) { - /* write a 16-bit word from transmit buffer to 16C32 */ - - TwoBytes[0] = info->xmit_buf[info->xmit_tail++]; - info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1); - TwoBytes[1] = info->xmit_buf[info->xmit_tail++]; - info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1); - - outw( *((u16 *)TwoBytes), info->io_base + DATAREG); - - info->xmit_cnt -= 2; - info->icount.tx += 2; - } else { - /* only 1 byte left to transmit or 1 FIFO slot left */ - - outw( (inw( info->io_base + CCAR) & 0x0780) | (TDR+LSBONLY), - info->io_base + CCAR ); - - if (info->x_char) { - /* transmit pending high priority char */ - outw( info->x_char,info->io_base + CCAR ); - info->x_char = 0; - } else { - outw( info->xmit_buf[info->xmit_tail++],info->io_base + CCAR ); - info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1); - info->xmit_cnt--; - } - info->icount.tx++; - } - } - -} /* end of usc_load_txfifo() */ - -/* usc_reset() - * - * Reset the adapter to a known state and prepare it for further use. - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void usc_reset( struct mgsl_struct *info ) -{ - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) { - int i; - u32 readval; - - /* Set BIT30 of Misc Control Register */ - /* (Local Control Register 0x50) to force reset of USC. */ - - volatile u32 *MiscCtrl = (u32 *)(info->lcr_base + 0x50); - u32 *LCR0BRDR = (u32 *)(info->lcr_base + 0x28); - - info->misc_ctrl_value |= BIT30; - *MiscCtrl = info->misc_ctrl_value; - - /* - * Force at least 170ns delay before clearing - * reset bit. Each read from LCR takes at least - * 30ns so 10 times for 300ns to be safe. - */ - for(i=0;i<10;i++) - readval = *MiscCtrl; - - info->misc_ctrl_value &= ~BIT30; - *MiscCtrl = info->misc_ctrl_value; - - *LCR0BRDR = BUS_DESCRIPTOR( - 1, // Write Strobe Hold (0-3) - 2, // Write Strobe Delay (0-3) - 2, // Read Strobe Delay (0-3) - 0, // NWDD (Write data-data) (0-3) - 4, // NWAD (Write Addr-data) (0-31) - 0, // NXDA (Read/Write Data-Addr) (0-3) - 0, // NRDD (Read Data-Data) (0-3) - 5 // NRAD (Read Addr-Data) (0-31) - ); - } else { - /* do HW reset */ - outb( 0,info->io_base + 8 ); - } - - info->mbre_bit = 0; - info->loopback_bits = 0; - info->usc_idle_mode = 0; - - /* - * Program the Bus Configuration Register (BCR) - * - * <15> 0 Don't use separate address - * <14..6> 0 reserved - * <5..4> 00 IAckmode = Default, don't care - * <3> 1 Bus Request Totem Pole output - * <2> 1 Use 16 Bit data bus - * <1> 0 IRQ Totem Pole output - * <0> 0 Don't Shift Right Addr - * - * 0000 0000 0000 1100 = 0x000c - * - * By writing to io_base + SDPIN the Wait/Ack pin is - * programmed to work as a Wait pin. - */ - - outw( 0x000c,info->io_base + SDPIN ); - - - outw( 0,info->io_base ); - outw( 0,info->io_base + CCAR ); - - /* select little endian byte ordering */ - usc_RTCmd( info, RTCmd_SelectLittleEndian ); - - - /* Port Control Register (PCR) - * - * <15..14> 11 Port 7 is Output (~DMAEN, Bit 14 : 0 = Enabled) - * <13..12> 11 Port 6 is Output (~INTEN, Bit 12 : 0 = Enabled) - * <11..10> 00 Port 5 is Input (No Connect, Don't Care) - * <9..8> 00 Port 4 is Input (No Connect, Don't Care) - * <7..6> 11 Port 3 is Output (~RTS, Bit 6 : 0 = Enabled ) - * <5..4> 11 Port 2 is Output (~DTR, Bit 4 : 0 = Enabled ) - * <3..2> 01 Port 1 is Input (Dedicated RxC) - * <1..0> 01 Port 0 is Input (Dedicated TxC) - * - * 1111 0000 1111 0101 = 0xf0f5 - */ - - usc_OutReg( info, PCR, 0xf0f5 ); - - - /* - * Input/Output Control Register - * - * <15..14> 00 CTS is active low input - * <13..12> 00 DCD is active low input - * <11..10> 00 TxREQ pin is input (DSR) - * <9..8> 00 RxREQ pin is input (RI) - * <7..6> 00 TxD is output (Transmit Data) - * <5..3> 000 TxC Pin in Input (14.7456MHz Clock) - * <2..0> 100 RxC is Output (drive with BRG0) - * - * 0000 0000 0000 0100 = 0x0004 - */ - - usc_OutReg( info, IOCR, 0x0004 ); - -} /* end of usc_reset() */ - -/* usc_set_async_mode() - * - * Program adapter for asynchronous communications. - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void usc_set_async_mode( struct mgsl_struct *info ) -{ - u16 RegValue; - - /* disable interrupts while programming USC */ - usc_DisableMasterIrqBit( info ); - - outw( 0, info->io_base ); /* clear Master Bus Enable (DCAR) */ - usc_DmaCmd( info, DmaCmd_ResetAllChannels ); /* disable both DMA channels */ - - usc_loopback_frame( info ); - - /* Channel mode Register (CMR) - * - * <15..14> 00 Tx Sub modes, 00 = 1 Stop Bit - * <13..12> 00 00 = 16X Clock - * <11..8> 0000 Transmitter mode = Asynchronous - * <7..6> 00 reserved? - * <5..4> 00 Rx Sub modes, 00 = 16X Clock - * <3..0> 0000 Receiver mode = Asynchronous - * - * 0000 0000 0000 0000 = 0x0 - */ - - RegValue = 0; - if ( info->params.stop_bits != 1 ) - RegValue |= BIT14; - usc_OutReg( info, CMR, RegValue ); - - - /* Receiver mode Register (RMR) - * - * <15..13> 000 encoding = None - * <12..08> 00000 reserved (Sync Only) - * <7..6> 00 Even parity - * <5> 0 parity disabled - * <4..2> 000 Receive Char Length = 8 bits - * <1..0> 00 Disable Receiver - * - * 0000 0000 0000 0000 = 0x0 - */ - - RegValue = 0; - - if ( info->params.data_bits != 8 ) - RegValue |= BIT4+BIT3+BIT2; - - if ( info->params.parity != ASYNC_PARITY_NONE ) { - RegValue |= BIT5; - if ( info->params.parity != ASYNC_PARITY_ODD ) - RegValue |= BIT6; - } - - usc_OutReg( info, RMR, RegValue ); - - - /* Set IRQ trigger level */ - - usc_RCmd( info, RCmd_SelectRicrIntLevel ); - - - /* Receive Interrupt Control Register (RICR) - * - * <15..8> ? RxFIFO IRQ Request Level - * - * Note: For async mode the receive FIFO level must be set - * to 0 to avoid the situation where the FIFO contains fewer bytes - * than the trigger level and no more data is expected. - * - * <7> 0 Exited Hunt IA (Interrupt Arm) - * <6> 0 Idle Received IA - * <5> 0 Break/Abort IA - * <4> 0 Rx Bound IA - * <3> 0 Queued status reflects oldest byte in FIFO - * <2> 0 Abort/PE IA - * <1> 0 Rx Overrun IA - * <0> 0 Select TC0 value for readback - * - * 0000 0000 0100 0000 = 0x0000 + (FIFOLEVEL in MSB) - */ - - usc_OutReg( info, RICR, 0x0000 ); - - usc_UnlatchRxstatusBits( info, RXSTATUS_ALL ); - usc_ClearIrqPendingBits( info, RECEIVE_STATUS ); - - - /* Transmit mode Register (TMR) - * - * <15..13> 000 encoding = None - * <12..08> 00000 reserved (Sync Only) - * <7..6> 00 Transmit parity Even - * <5> 0 Transmit parity Disabled - * <4..2> 000 Tx Char Length = 8 bits - * <1..0> 00 Disable Transmitter - * - * 0000 0000 0000 0000 = 0x0 - */ - - RegValue = 0; - - if ( info->params.data_bits != 8 ) - RegValue |= BIT4+BIT3+BIT2; - - if ( info->params.parity != ASYNC_PARITY_NONE ) { - RegValue |= BIT5; - if ( info->params.parity != ASYNC_PARITY_ODD ) - RegValue |= BIT6; - } - - usc_OutReg( info, TMR, RegValue ); - - usc_set_txidle( info ); - - - /* Set IRQ trigger level */ - - usc_TCmd( info, TCmd_SelectTicrIntLevel ); - - - /* Transmit Interrupt Control Register (TICR) - * - * <15..8> ? Transmit FIFO IRQ Level - * <7> 0 Present IA (Interrupt Arm) - * <6> 1 Idle Sent IA - * <5> 0 Abort Sent IA - * <4> 0 EOF/EOM Sent IA - * <3> 0 CRC Sent IA - * <2> 0 1 = Wait for SW Trigger to Start Frame - * <1> 0 Tx Underrun IA - * <0> 0 TC0 constant on read back - * - * 0000 0000 0100 0000 = 0x0040 - */ - - usc_OutReg( info, TICR, 0x1f40 ); - - usc_UnlatchTxstatusBits( info, TXSTATUS_ALL ); - usc_ClearIrqPendingBits( info, TRANSMIT_STATUS ); - - usc_enable_async_clock( info, info->params.data_rate ); - - - /* Channel Control/status Register (CCSR) - * - * <15> X RCC FIFO Overflow status (RO) - * <14> X RCC FIFO Not Empty status (RO) - * <13> 0 1 = Clear RCC FIFO (WO) - * <12> X DPLL in Sync status (RO) - * <11> X DPLL 2 Missed Clocks status (RO) - * <10> X DPLL 1 Missed Clock status (RO) - * <9..8> 00 DPLL Resync on rising and falling edges (RW) - * <7> X SDLC Loop On status (RO) - * <6> X SDLC Loop Send status (RO) - * <5> 1 Bypass counters for TxClk and RxClk (RW) - * <4..2> 000 Last Char of SDLC frame has 8 bits (RW) - * <1..0> 00 reserved - * - * 0000 0000 0010 0000 = 0x0020 - */ - - usc_OutReg( info, CCSR, 0x0020 ); - - usc_DisableInterrupts( info, TRANSMIT_STATUS + TRANSMIT_DATA + - RECEIVE_DATA + RECEIVE_STATUS ); - - usc_ClearIrqPendingBits( info, TRANSMIT_STATUS + TRANSMIT_DATA + - RECEIVE_DATA + RECEIVE_STATUS ); - - usc_EnableMasterIrqBit( info ); - - if (info->bus_type == MGSL_BUS_TYPE_ISA) { - /* Enable INTEN (Port 6, Bit12) */ - /* This connects the IRQ request signal to the ISA bus */ - usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) & ~BIT12)); - } - - if (info->params.loopback) { - info->loopback_bits = 0x300; - outw(0x0300, info->io_base + CCAR); - } - -} /* end of usc_set_async_mode() */ - -/* usc_loopback_frame() - * - * Loop back a small (2 byte) dummy SDLC frame. - * Interrupts and DMA are NOT used. The purpose of this is to - * clear any 'stale' status info left over from running in async mode. - * - * The 16C32 shows the strange behaviour of marking the 1st - * received SDLC frame with a CRC error even when there is no - * CRC error. To get around this a small dummy from of 2 bytes - * is looped back when switching from async to sync mode. - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void usc_loopback_frame( struct mgsl_struct *info ) -{ - int i; - unsigned long oldmode = info->params.mode; - - info->params.mode = MGSL_MODE_HDLC; - - usc_DisableMasterIrqBit( info ); - - usc_set_sdlc_mode( info ); - usc_enable_loopback( info, 1 ); - - /* Write 16-bit Time Constant for BRG0 */ - usc_OutReg( info, TC0R, 0 ); - - /* Channel Control Register (CCR) - * - * <15..14> 00 Don't use 32-bit Tx Control Blocks (TCBs) - * <13> 0 Trigger Tx on SW Command Disabled - * <12> 0 Flag Preamble Disabled - * <11..10> 00 Preamble Length = 8-Bits - * <9..8> 01 Preamble Pattern = flags - * <7..6> 10 Don't use 32-bit Rx status Blocks (RSBs) - * <5> 0 Trigger Rx on SW Command Disabled - * <4..0> 0 reserved - * - * 0000 0001 0000 0000 = 0x0100 - */ - - usc_OutReg( info, CCR, 0x0100 ); - - /* SETUP RECEIVER */ - usc_RTCmd( info, RTCmd_PurgeRxFifo ); - usc_EnableReceiver(info,ENABLE_UNCONDITIONAL); - - /* SETUP TRANSMITTER */ - /* Program the Transmit Character Length Register (TCLR) */ - /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */ - usc_OutReg( info, TCLR, 2 ); - usc_RTCmd( info, RTCmd_PurgeTxFifo ); - - /* unlatch Tx status bits, and start transmit channel. */ - usc_UnlatchTxstatusBits(info,TXSTATUS_ALL); - outw(0,info->io_base + DATAREG); - - /* ENABLE TRANSMITTER */ - usc_TCmd( info, TCmd_SendFrame ); - usc_EnableTransmitter(info,ENABLE_UNCONDITIONAL); - - /* WAIT FOR RECEIVE COMPLETE */ - for (i=0 ; i<1000 ; i++) - if (usc_InReg( info, RCSR ) & (BIT8 + BIT4 + BIT3 + BIT1)) - break; - - /* clear Internal Data loopback mode */ - usc_enable_loopback(info, 0); - - usc_EnableMasterIrqBit(info); - - info->params.mode = oldmode; - -} /* end of usc_loopback_frame() */ - -/* usc_set_sync_mode() Programs the USC for SDLC communications. - * - * Arguments: info pointer to adapter info structure - * Return Value: None - */ -static void usc_set_sync_mode( struct mgsl_struct *info ) -{ - usc_loopback_frame( info ); - usc_set_sdlc_mode( info ); - - if (info->bus_type == MGSL_BUS_TYPE_ISA) { - /* Enable INTEN (Port 6, Bit12) */ - /* This connects the IRQ request signal to the ISA bus */ - usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) & ~BIT12)); - } - - usc_enable_aux_clock(info, info->params.clock_speed); - - if (info->params.loopback) - usc_enable_loopback(info,1); - -} /* end of mgsl_set_sync_mode() */ - -/* usc_set_txidle() Set the HDLC idle mode for the transmitter. - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void usc_set_txidle( struct mgsl_struct *info ) -{ - u16 usc_idle_mode = IDLEMODE_FLAGS; - - /* Map API idle mode to USC register bits */ - - switch( info->idle_mode ){ - case HDLC_TXIDLE_FLAGS: usc_idle_mode = IDLEMODE_FLAGS; break; - case HDLC_TXIDLE_ALT_ZEROS_ONES: usc_idle_mode = IDLEMODE_ALT_ONE_ZERO; break; - case HDLC_TXIDLE_ZEROS: usc_idle_mode = IDLEMODE_ZERO; break; - case HDLC_TXIDLE_ONES: usc_idle_mode = IDLEMODE_ONE; break; - case HDLC_TXIDLE_ALT_MARK_SPACE: usc_idle_mode = IDLEMODE_ALT_MARK_SPACE; break; - case HDLC_TXIDLE_SPACE: usc_idle_mode = IDLEMODE_SPACE; break; - case HDLC_TXIDLE_MARK: usc_idle_mode = IDLEMODE_MARK; break; - } - - info->usc_idle_mode = usc_idle_mode; - //usc_OutReg(info, TCSR, usc_idle_mode); - info->tcsr_value &= ~IDLEMODE_MASK; /* clear idle mode bits */ - info->tcsr_value += usc_idle_mode; - usc_OutReg(info, TCSR, info->tcsr_value); - - /* - * if SyncLink WAN adapter is running in external sync mode, the - * transmitter has been set to Monosync in order to try to mimic - * a true raw outbound bit stream. Monosync still sends an open/close - * sync char at the start/end of a frame. Try to match those sync - * patterns to the idle mode set here - */ - if ( info->params.mode == MGSL_MODE_RAW ) { - unsigned char syncpat = 0; - switch( info->idle_mode ) { - case HDLC_TXIDLE_FLAGS: - syncpat = 0x7e; - break; - case HDLC_TXIDLE_ALT_ZEROS_ONES: - syncpat = 0x55; - break; - case HDLC_TXIDLE_ZEROS: - case HDLC_TXIDLE_SPACE: - syncpat = 0x00; - break; - case HDLC_TXIDLE_ONES: - case HDLC_TXIDLE_MARK: - syncpat = 0xff; - break; - case HDLC_TXIDLE_ALT_MARK_SPACE: - syncpat = 0xaa; - break; - } - - usc_SetTransmitSyncChars(info,syncpat,syncpat); - } - -} /* end of usc_set_txidle() */ - -/* usc_get_serial_signals() - * - * Query the adapter for the state of the V24 status (input) signals. - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void usc_get_serial_signals( struct mgsl_struct *info ) -{ - u16 status; - - /* clear all serial signals except DTR and RTS */ - info->serial_signals &= SerialSignal_DTR + SerialSignal_RTS; - - /* Read the Misc Interrupt status Register (MISR) to get */ - /* the V24 status signals. */ - - status = usc_InReg( info, MISR ); - - /* set serial signal bits to reflect MISR */ - - if ( status & MISCSTATUS_CTS ) - info->serial_signals |= SerialSignal_CTS; - - if ( status & MISCSTATUS_DCD ) - info->serial_signals |= SerialSignal_DCD; - - if ( status & MISCSTATUS_RI ) - info->serial_signals |= SerialSignal_RI; - - if ( status & MISCSTATUS_DSR ) - info->serial_signals |= SerialSignal_DSR; - -} /* end of usc_get_serial_signals() */ - -/* usc_set_serial_signals() - * - * Set the state of DTR and RTS based on contents of - * serial_signals member of device extension. - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void usc_set_serial_signals( struct mgsl_struct *info ) -{ - u16 Control; - unsigned char V24Out = info->serial_signals; - - /* get the current value of the Port Control Register (PCR) */ - - Control = usc_InReg( info, PCR ); - - if ( V24Out & SerialSignal_RTS ) - Control &= ~(BIT6); - else - Control |= BIT6; - - if ( V24Out & SerialSignal_DTR ) - Control &= ~(BIT4); - else - Control |= BIT4; - - usc_OutReg( info, PCR, Control ); - -} /* end of usc_set_serial_signals() */ - -/* usc_enable_async_clock() - * - * Enable the async clock at the specified frequency. - * - * Arguments: info pointer to device instance data - * data_rate data rate of clock in bps - * 0 disables the AUX clock. - * Return Value: None - */ -static void usc_enable_async_clock( struct mgsl_struct *info, u32 data_rate ) -{ - if ( data_rate ) { - /* - * Clock mode Control Register (CMCR) - * - * <15..14> 00 counter 1 Disabled - * <13..12> 00 counter 0 Disabled - * <11..10> 11 BRG1 Input is TxC Pin - * <9..8> 11 BRG0 Input is TxC Pin - * <7..6> 01 DPLL Input is BRG1 Output - * <5..3> 100 TxCLK comes from BRG0 - * <2..0> 100 RxCLK comes from BRG0 - * - * 0000 1111 0110 0100 = 0x0f64 - */ - - usc_OutReg( info, CMCR, 0x0f64 ); - - - /* - * Write 16-bit Time Constant for BRG0 - * Time Constant = (ClkSpeed / data_rate) - 1 - * ClkSpeed = 921600 (ISA), 691200 (PCI) - */ - - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - usc_OutReg( info, TC0R, (u16)((691200/data_rate) - 1) ); - else - usc_OutReg( info, TC0R, (u16)((921600/data_rate) - 1) ); - - - /* - * Hardware Configuration Register (HCR) - * Clear Bit 1, BRG0 mode = Continuous - * Set Bit 0 to enable BRG0. - */ - - usc_OutReg( info, HCR, - (u16)((usc_InReg( info, HCR ) & ~BIT1) | BIT0) ); - - - /* Input/Output Control Reg, <2..0> = 100, Drive RxC pin with BRG0 */ - - usc_OutReg( info, IOCR, - (u16)((usc_InReg(info, IOCR) & 0xfff8) | 0x0004) ); - } else { - /* data rate == 0 so turn off BRG0 */ - usc_OutReg( info, HCR, (u16)(usc_InReg( info, HCR ) & ~BIT0) ); - } - -} /* end of usc_enable_async_clock() */ - -/* - * Buffer Structures: - * - * Normal memory access uses virtual addresses that can make discontiguous - * physical memory pages appear to be contiguous in the virtual address - * space (the processors memory mapping handles the conversions). - * - * DMA transfers require physically contiguous memory. This is because - * the DMA system controller and DMA bus masters deal with memory using - * only physical addresses. - * - * This causes a problem under Windows NT when large DMA buffers are - * needed. Fragmentation of the nonpaged pool prevents allocations of - * physically contiguous buffers larger than the PAGE_SIZE. - * - * However the 16C32 supports Bus Master Scatter/Gather DMA which - * allows DMA transfers to physically discontiguous buffers. Information - * about each data transfer buffer is contained in a memory structure - * called a 'buffer entry'. A list of buffer entries is maintained - * to track and control the use of the data transfer buffers. - * - * To support this strategy we will allocate sufficient PAGE_SIZE - * contiguous memory buffers to allow for the total required buffer - * space. - * - * The 16C32 accesses the list of buffer entries using Bus Master - * DMA. Control information is read from the buffer entries by the - * 16C32 to control data transfers. status information is written to - * the buffer entries by the 16C32 to indicate the status of completed - * transfers. - * - * The CPU writes control information to the buffer entries to control - * the 16C32 and reads status information from the buffer entries to - * determine information about received and transmitted frames. - * - * Because the CPU and 16C32 (adapter) both need simultaneous access - * to the buffer entries, the buffer entry memory is allocated with - * HalAllocateCommonBuffer(). This restricts the size of the buffer - * entry list to PAGE_SIZE. - * - * The actual data buffers on the other hand will only be accessed - * by the CPU or the adapter but not by both simultaneously. This allows - * Scatter/Gather packet based DMA procedures for using physically - * discontiguous pages. - */ - -/* - * mgsl_reset_tx_dma_buffers() - * - * Set the count for all transmit buffers to 0 to indicate the - * buffer is available for use and set the current buffer to the - * first buffer. This effectively makes all buffers free and - * discards any data in buffers. - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void mgsl_reset_tx_dma_buffers( struct mgsl_struct *info ) -{ - unsigned int i; - - for ( i = 0; i < info->tx_buffer_count; i++ ) { - *((unsigned long *)&(info->tx_buffer_list[i].count)) = 0; - } - - info->current_tx_buffer = 0; - info->start_tx_dma_buffer = 0; - info->tx_dma_buffers_used = 0; - - info->get_tx_holding_index = 0; - info->put_tx_holding_index = 0; - info->tx_holding_count = 0; - -} /* end of mgsl_reset_tx_dma_buffers() */ - -/* - * num_free_tx_dma_buffers() - * - * returns the number of free tx dma buffers available - * - * Arguments: info pointer to device instance data - * Return Value: number of free tx dma buffers - */ -static int num_free_tx_dma_buffers(struct mgsl_struct *info) -{ - return info->tx_buffer_count - info->tx_dma_buffers_used; -} - -/* - * mgsl_reset_rx_dma_buffers() - * - * Set the count for all receive buffers to DMABUFFERSIZE - * and set the current buffer to the first buffer. This effectively - * makes all buffers free and discards any data in buffers. - * - * Arguments: info pointer to device instance data - * Return Value: None - */ -static void mgsl_reset_rx_dma_buffers( struct mgsl_struct *info ) -{ - unsigned int i; - - for ( i = 0; i < info->rx_buffer_count; i++ ) { - *((unsigned long *)&(info->rx_buffer_list[i].count)) = DMABUFFERSIZE; -// info->rx_buffer_list[i].count = DMABUFFERSIZE; -// info->rx_buffer_list[i].status = 0; - } - - info->current_rx_buffer = 0; - -} /* end of mgsl_reset_rx_dma_buffers() */ - -/* - * mgsl_free_rx_frame_buffers() - * - * Free the receive buffers used by a received SDLC - * frame such that the buffers can be reused. - * - * Arguments: - * - * info pointer to device instance data - * StartIndex index of 1st receive buffer of frame - * EndIndex index of last receive buffer of frame - * - * Return Value: None - */ -static void mgsl_free_rx_frame_buffers( struct mgsl_struct *info, unsigned int StartIndex, unsigned int EndIndex ) -{ - bool Done = false; - DMABUFFERENTRY *pBufEntry; - unsigned int Index; - - /* Starting with 1st buffer entry of the frame clear the status */ - /* field and set the count field to DMA Buffer Size. */ - - Index = StartIndex; - - while( !Done ) { - pBufEntry = &(info->rx_buffer_list[Index]); - - if ( Index == EndIndex ) { - /* This is the last buffer of the frame! */ - Done = true; - } - - /* reset current buffer for reuse */ -// pBufEntry->status = 0; -// pBufEntry->count = DMABUFFERSIZE; - *((unsigned long *)&(pBufEntry->count)) = DMABUFFERSIZE; - - /* advance to next buffer entry in linked list */ - Index++; - if ( Index == info->rx_buffer_count ) - Index = 0; - } - - /* set current buffer to next buffer after last buffer of frame */ - info->current_rx_buffer = Index; - -} /* end of free_rx_frame_buffers() */ - -/* mgsl_get_rx_frame() - * - * This function attempts to return a received SDLC frame from the - * receive DMA buffers. Only frames received without errors are returned. - * - * Arguments: info pointer to device extension - * Return Value: true if frame returned, otherwise false - */ -static bool mgsl_get_rx_frame(struct mgsl_struct *info) -{ - unsigned int StartIndex, EndIndex; /* index of 1st and last buffers of Rx frame */ - unsigned short status; - DMABUFFERENTRY *pBufEntry; - unsigned int framesize = 0; - bool ReturnCode = false; - unsigned long flags; - struct tty_struct *tty = info->port.tty; - bool return_frame = false; - - /* - * current_rx_buffer points to the 1st buffer of the next available - * receive frame. To find the last buffer of the frame look for - * a non-zero status field in the buffer entries. (The status - * field is set by the 16C32 after completing a receive frame. - */ - - StartIndex = EndIndex = info->current_rx_buffer; - - while( !info->rx_buffer_list[EndIndex].status ) { - /* - * If the count field of the buffer entry is non-zero then - * this buffer has not been used. (The 16C32 clears the count - * field when it starts using the buffer.) If an unused buffer - * is encountered then there are no frames available. - */ - - if ( info->rx_buffer_list[EndIndex].count ) - goto Cleanup; - - /* advance to next buffer entry in linked list */ - EndIndex++; - if ( EndIndex == info->rx_buffer_count ) - EndIndex = 0; - - /* if entire list searched then no frame available */ - if ( EndIndex == StartIndex ) { - /* If this occurs then something bad happened, - * all buffers have been 'used' but none mark - * the end of a frame. Reset buffers and receiver. - */ - - if ( info->rx_enabled ){ - spin_lock_irqsave(&info->irq_spinlock,flags); - usc_start_receiver(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - } - goto Cleanup; - } - } - - - /* check status of receive frame */ - - status = info->rx_buffer_list[EndIndex].status; - - if ( status & (RXSTATUS_SHORT_FRAME + RXSTATUS_OVERRUN + - RXSTATUS_CRC_ERROR + RXSTATUS_ABORT) ) { - if ( status & RXSTATUS_SHORT_FRAME ) - info->icount.rxshort++; - else if ( status & RXSTATUS_ABORT ) - info->icount.rxabort++; - else if ( status & RXSTATUS_OVERRUN ) - info->icount.rxover++; - else { - info->icount.rxcrc++; - if ( info->params.crc_type & HDLC_CRC_RETURN_EX ) - return_frame = true; - } - framesize = 0; -#if SYNCLINK_GENERIC_HDLC - { - info->netdev->stats.rx_errors++; - info->netdev->stats.rx_frame_errors++; - } -#endif - } else - return_frame = true; - - if ( return_frame ) { - /* receive frame has no errors, get frame size. - * The frame size is the starting value of the RCC (which was - * set to 0xffff) minus the ending value of the RCC (decremented - * once for each receive character) minus 2 for the 16-bit CRC. - */ - - framesize = RCLRVALUE - info->rx_buffer_list[EndIndex].rcc; - - /* adjust frame size for CRC if any */ - if ( info->params.crc_type == HDLC_CRC_16_CCITT ) - framesize -= 2; - else if ( info->params.crc_type == HDLC_CRC_32_CCITT ) - framesize -= 4; - } - - if ( debug_level >= DEBUG_LEVEL_BH ) - printk("%s(%d):mgsl_get_rx_frame(%s) status=%04X size=%d\n", - __FILE__,__LINE__,info->device_name,status,framesize); - - if ( debug_level >= DEBUG_LEVEL_DATA ) - mgsl_trace_block(info,info->rx_buffer_list[StartIndex].virt_addr, - min_t(int, framesize, DMABUFFERSIZE),0); - - if (framesize) { - if ( ( (info->params.crc_type & HDLC_CRC_RETURN_EX) && - ((framesize+1) > info->max_frame_size) ) || - (framesize > info->max_frame_size) ) - info->icount.rxlong++; - else { - /* copy dma buffer(s) to contiguous intermediate buffer */ - int copy_count = framesize; - int index = StartIndex; - unsigned char *ptmp = info->intermediate_rxbuffer; - - if ( !(status & RXSTATUS_CRC_ERROR)) - info->icount.rxok++; - - while(copy_count) { - int partial_count; - if ( copy_count > DMABUFFERSIZE ) - partial_count = DMABUFFERSIZE; - else - partial_count = copy_count; - - pBufEntry = &(info->rx_buffer_list[index]); - memcpy( ptmp, pBufEntry->virt_addr, partial_count ); - ptmp += partial_count; - copy_count -= partial_count; - - if ( ++index == info->rx_buffer_count ) - index = 0; - } - - if ( info->params.crc_type & HDLC_CRC_RETURN_EX ) { - ++framesize; - *ptmp = (status & RXSTATUS_CRC_ERROR ? - RX_CRC_ERROR : - RX_OK); - - if ( debug_level >= DEBUG_LEVEL_DATA ) - printk("%s(%d):mgsl_get_rx_frame(%s) rx frame status=%d\n", - __FILE__,__LINE__,info->device_name, - *ptmp); - } - -#if SYNCLINK_GENERIC_HDLC - if (info->netcount) - hdlcdev_rx(info,info->intermediate_rxbuffer,framesize); - else -#endif - ldisc_receive_buf(tty, info->intermediate_rxbuffer, info->flag_buf, framesize); - } - } - /* Free the buffers used by this frame. */ - mgsl_free_rx_frame_buffers( info, StartIndex, EndIndex ); - - ReturnCode = true; - -Cleanup: - - if ( info->rx_enabled && info->rx_overflow ) { - /* The receiver needs to restarted because of - * a receive overflow (buffer or FIFO). If the - * receive buffers are now empty, then restart receiver. - */ - - if ( !info->rx_buffer_list[EndIndex].status && - info->rx_buffer_list[EndIndex].count ) { - spin_lock_irqsave(&info->irq_spinlock,flags); - usc_start_receiver(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - } - } - - return ReturnCode; - -} /* end of mgsl_get_rx_frame() */ - -/* mgsl_get_raw_rx_frame() - * - * This function attempts to return a received frame from the - * receive DMA buffers when running in external loop mode. In this mode, - * we will return at most one DMABUFFERSIZE frame to the application. - * The USC receiver is triggering off of DCD going active to start a new - * frame, and DCD going inactive to terminate the frame (similar to - * processing a closing flag character). - * - * In this routine, we will return DMABUFFERSIZE "chunks" at a time. - * If DCD goes inactive, the last Rx DMA Buffer will have a non-zero - * status field and the RCC field will indicate the length of the - * entire received frame. We take this RCC field and get the modulus - * of RCC and DMABUFFERSIZE to determine if number of bytes in the - * last Rx DMA buffer and return that last portion of the frame. - * - * Arguments: info pointer to device extension - * Return Value: true if frame returned, otherwise false - */ -static bool mgsl_get_raw_rx_frame(struct mgsl_struct *info) -{ - unsigned int CurrentIndex, NextIndex; - unsigned short status; - DMABUFFERENTRY *pBufEntry; - unsigned int framesize = 0; - bool ReturnCode = false; - unsigned long flags; - struct tty_struct *tty = info->port.tty; - - /* - * current_rx_buffer points to the 1st buffer of the next available - * receive frame. The status field is set by the 16C32 after - * completing a receive frame. If the status field of this buffer - * is zero, either the USC is still filling this buffer or this - * is one of a series of buffers making up a received frame. - * - * If the count field of this buffer is zero, the USC is either - * using this buffer or has used this buffer. Look at the count - * field of the next buffer. If that next buffer's count is - * non-zero, the USC is still actively using the current buffer. - * Otherwise, if the next buffer's count field is zero, the - * current buffer is complete and the USC is using the next - * buffer. - */ - CurrentIndex = NextIndex = info->current_rx_buffer; - ++NextIndex; - if ( NextIndex == info->rx_buffer_count ) - NextIndex = 0; - - if ( info->rx_buffer_list[CurrentIndex].status != 0 || - (info->rx_buffer_list[CurrentIndex].count == 0 && - info->rx_buffer_list[NextIndex].count == 0)) { - /* - * Either the status field of this dma buffer is non-zero - * (indicating the last buffer of a receive frame) or the next - * buffer is marked as in use -- implying this buffer is complete - * and an intermediate buffer for this received frame. - */ - - status = info->rx_buffer_list[CurrentIndex].status; - - if ( status & (RXSTATUS_SHORT_FRAME + RXSTATUS_OVERRUN + - RXSTATUS_CRC_ERROR + RXSTATUS_ABORT) ) { - if ( status & RXSTATUS_SHORT_FRAME ) - info->icount.rxshort++; - else if ( status & RXSTATUS_ABORT ) - info->icount.rxabort++; - else if ( status & RXSTATUS_OVERRUN ) - info->icount.rxover++; - else - info->icount.rxcrc++; - framesize = 0; - } else { - /* - * A receive frame is available, get frame size and status. - * - * The frame size is the starting value of the RCC (which was - * set to 0xffff) minus the ending value of the RCC (decremented - * once for each receive character) minus 2 or 4 for the 16-bit - * or 32-bit CRC. - * - * If the status field is zero, this is an intermediate buffer. - * It's size is 4K. - * - * If the DMA Buffer Entry's Status field is non-zero, the - * receive operation completed normally (ie: DCD dropped). The - * RCC field is valid and holds the received frame size. - * It is possible that the RCC field will be zero on a DMA buffer - * entry with a non-zero status. This can occur if the total - * frame size (number of bytes between the time DCD goes active - * to the time DCD goes inactive) exceeds 65535 bytes. In this - * case the 16C32 has underrun on the RCC count and appears to - * stop updating this counter to let us know the actual received - * frame size. If this happens (non-zero status and zero RCC), - * simply return the entire RxDMA Buffer - */ - if ( status ) { - /* - * In the event that the final RxDMA Buffer is - * terminated with a non-zero status and the RCC - * field is zero, we interpret this as the RCC - * having underflowed (received frame > 65535 bytes). - * - * Signal the event to the user by passing back - * a status of RxStatus_CrcError returning the full - * buffer and let the app figure out what data is - * actually valid - */ - if ( info->rx_buffer_list[CurrentIndex].rcc ) - framesize = RCLRVALUE - info->rx_buffer_list[CurrentIndex].rcc; - else - framesize = DMABUFFERSIZE; - } - else - framesize = DMABUFFERSIZE; - } - - if ( framesize > DMABUFFERSIZE ) { - /* - * if running in raw sync mode, ISR handler for - * End Of Buffer events terminates all buffers at 4K. - * If this frame size is said to be >4K, get the - * actual number of bytes of the frame in this buffer. - */ - framesize = framesize % DMABUFFERSIZE; - } - - - if ( debug_level >= DEBUG_LEVEL_BH ) - printk("%s(%d):mgsl_get_raw_rx_frame(%s) status=%04X size=%d\n", - __FILE__,__LINE__,info->device_name,status,framesize); - - if ( debug_level >= DEBUG_LEVEL_DATA ) - mgsl_trace_block(info,info->rx_buffer_list[CurrentIndex].virt_addr, - min_t(int, framesize, DMABUFFERSIZE),0); - - if (framesize) { - /* copy dma buffer(s) to contiguous intermediate buffer */ - /* NOTE: we never copy more than DMABUFFERSIZE bytes */ - - pBufEntry = &(info->rx_buffer_list[CurrentIndex]); - memcpy( info->intermediate_rxbuffer, pBufEntry->virt_addr, framesize); - info->icount.rxok++; - - ldisc_receive_buf(tty, info->intermediate_rxbuffer, info->flag_buf, framesize); - } - - /* Free the buffers used by this frame. */ - mgsl_free_rx_frame_buffers( info, CurrentIndex, CurrentIndex ); - - ReturnCode = true; - } - - - if ( info->rx_enabled && info->rx_overflow ) { - /* The receiver needs to restarted because of - * a receive overflow (buffer or FIFO). If the - * receive buffers are now empty, then restart receiver. - */ - - if ( !info->rx_buffer_list[CurrentIndex].status && - info->rx_buffer_list[CurrentIndex].count ) { - spin_lock_irqsave(&info->irq_spinlock,flags); - usc_start_receiver(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - } - } - - return ReturnCode; - -} /* end of mgsl_get_raw_rx_frame() */ - -/* mgsl_load_tx_dma_buffer() - * - * Load the transmit DMA buffer with the specified data. - * - * Arguments: - * - * info pointer to device extension - * Buffer pointer to buffer containing frame to load - * BufferSize size in bytes of frame in Buffer - * - * Return Value: None - */ -static void mgsl_load_tx_dma_buffer(struct mgsl_struct *info, - const char *Buffer, unsigned int BufferSize) -{ - unsigned short Copycount; - unsigned int i = 0; - DMABUFFERENTRY *pBufEntry; - - if ( debug_level >= DEBUG_LEVEL_DATA ) - mgsl_trace_block(info,Buffer, min_t(int, BufferSize, DMABUFFERSIZE), 1); - - if (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) { - /* set CMR:13 to start transmit when - * next GoAhead (abort) is received - */ - info->cmr_value |= BIT13; - } - - /* begin loading the frame in the next available tx dma - * buffer, remember it's starting location for setting - * up tx dma operation - */ - i = info->current_tx_buffer; - info->start_tx_dma_buffer = i; - - /* Setup the status and RCC (Frame Size) fields of the 1st */ - /* buffer entry in the transmit DMA buffer list. */ - - info->tx_buffer_list[i].status = info->cmr_value & 0xf000; - info->tx_buffer_list[i].rcc = BufferSize; - info->tx_buffer_list[i].count = BufferSize; - - /* Copy frame data from 1st source buffer to the DMA buffers. */ - /* The frame data may span multiple DMA buffers. */ - - while( BufferSize ){ - /* Get a pointer to next DMA buffer entry. */ - pBufEntry = &info->tx_buffer_list[i++]; - - if ( i == info->tx_buffer_count ) - i=0; - - /* Calculate the number of bytes that can be copied from */ - /* the source buffer to this DMA buffer. */ - if ( BufferSize > DMABUFFERSIZE ) - Copycount = DMABUFFERSIZE; - else - Copycount = BufferSize; - - /* Actually copy data from source buffer to DMA buffer. */ - /* Also set the data count for this individual DMA buffer. */ - if ( info->bus_type == MGSL_BUS_TYPE_PCI ) - mgsl_load_pci_memory(pBufEntry->virt_addr, Buffer,Copycount); - else - memcpy(pBufEntry->virt_addr, Buffer, Copycount); - - pBufEntry->count = Copycount; - - /* Advance source pointer and reduce remaining data count. */ - Buffer += Copycount; - BufferSize -= Copycount; - - ++info->tx_dma_buffers_used; - } - - /* remember next available tx dma buffer */ - info->current_tx_buffer = i; - -} /* end of mgsl_load_tx_dma_buffer() */ - -/* - * mgsl_register_test() - * - * Performs a register test of the 16C32. - * - * Arguments: info pointer to device instance data - * Return Value: true if test passed, otherwise false - */ -static bool mgsl_register_test( struct mgsl_struct *info ) -{ - static unsigned short BitPatterns[] = - { 0x0000, 0xffff, 0xaaaa, 0x5555, 0x1234, 0x6969, 0x9696, 0x0f0f }; - static unsigned int Patterncount = ARRAY_SIZE(BitPatterns); - unsigned int i; - bool rc = true; - unsigned long flags; - - spin_lock_irqsave(&info->irq_spinlock,flags); - usc_reset(info); - - /* Verify the reset state of some registers. */ - - if ( (usc_InReg( info, SICR ) != 0) || - (usc_InReg( info, IVR ) != 0) || - (usc_InDmaReg( info, DIVR ) != 0) ){ - rc = false; - } - - if ( rc ){ - /* Write bit patterns to various registers but do it out of */ - /* sync, then read back and verify values. */ - - for ( i = 0 ; i < Patterncount ; i++ ) { - usc_OutReg( info, TC0R, BitPatterns[i] ); - usc_OutReg( info, TC1R, BitPatterns[(i+1)%Patterncount] ); - usc_OutReg( info, TCLR, BitPatterns[(i+2)%Patterncount] ); - usc_OutReg( info, RCLR, BitPatterns[(i+3)%Patterncount] ); - usc_OutReg( info, RSR, BitPatterns[(i+4)%Patterncount] ); - usc_OutDmaReg( info, TBCR, BitPatterns[(i+5)%Patterncount] ); - - if ( (usc_InReg( info, TC0R ) != BitPatterns[i]) || - (usc_InReg( info, TC1R ) != BitPatterns[(i+1)%Patterncount]) || - (usc_InReg( info, TCLR ) != BitPatterns[(i+2)%Patterncount]) || - (usc_InReg( info, RCLR ) != BitPatterns[(i+3)%Patterncount]) || - (usc_InReg( info, RSR ) != BitPatterns[(i+4)%Patterncount]) || - (usc_InDmaReg( info, TBCR ) != BitPatterns[(i+5)%Patterncount]) ){ - rc = false; - break; - } - } - } - - usc_reset(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - return rc; - -} /* end of mgsl_register_test() */ - -/* mgsl_irq_test() Perform interrupt test of the 16C32. - * - * Arguments: info pointer to device instance data - * Return Value: true if test passed, otherwise false - */ -static bool mgsl_irq_test( struct mgsl_struct *info ) -{ - unsigned long EndTime; - unsigned long flags; - - spin_lock_irqsave(&info->irq_spinlock,flags); - usc_reset(info); - - /* - * Setup 16C32 to interrupt on TxC pin (14MHz clock) transition. - * The ISR sets irq_occurred to true. - */ - - info->irq_occurred = false; - - /* Enable INTEN gate for ISA adapter (Port 6, Bit12) */ - /* Enable INTEN (Port 6, Bit12) */ - /* This connects the IRQ request signal to the ISA bus */ - /* on the ISA adapter. This has no effect for the PCI adapter */ - usc_OutReg( info, PCR, (unsigned short)((usc_InReg(info, PCR) | BIT13) & ~BIT12) ); - - usc_EnableMasterIrqBit(info); - usc_EnableInterrupts(info, IO_PIN); - usc_ClearIrqPendingBits(info, IO_PIN); - - usc_UnlatchIostatusBits(info, MISCSTATUS_TXC_LATCHED); - usc_EnableStatusIrqs(info, SICR_TXC_ACTIVE + SICR_TXC_INACTIVE); - - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - EndTime=100; - while( EndTime-- && !info->irq_occurred ) { - msleep_interruptible(10); - } - - spin_lock_irqsave(&info->irq_spinlock,flags); - usc_reset(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - return info->irq_occurred; - -} /* end of mgsl_irq_test() */ - -/* mgsl_dma_test() - * - * Perform a DMA test of the 16C32. A small frame is - * transmitted via DMA from a transmit buffer to a receive buffer - * using single buffer DMA mode. - * - * Arguments: info pointer to device instance data - * Return Value: true if test passed, otherwise false - */ -static bool mgsl_dma_test( struct mgsl_struct *info ) -{ - unsigned short FifoLevel; - unsigned long phys_addr; - unsigned int FrameSize; - unsigned int i; - char *TmpPtr; - bool rc = true; - unsigned short status=0; - unsigned long EndTime; - unsigned long flags; - MGSL_PARAMS tmp_params; - - /* save current port options */ - memcpy(&tmp_params,&info->params,sizeof(MGSL_PARAMS)); - /* load default port options */ - memcpy(&info->params,&default_params,sizeof(MGSL_PARAMS)); - -#define TESTFRAMESIZE 40 - - spin_lock_irqsave(&info->irq_spinlock,flags); - - /* setup 16C32 for SDLC DMA transfer mode */ - - usc_reset(info); - usc_set_sdlc_mode(info); - usc_enable_loopback(info,1); - - /* Reprogram the RDMR so that the 16C32 does NOT clear the count - * field of the buffer entry after fetching buffer address. This - * way we can detect a DMA failure for a DMA read (which should be - * non-destructive to system memory) before we try and write to - * memory (where a failure could corrupt system memory). - */ - - /* Receive DMA mode Register (RDMR) - * - * <15..14> 11 DMA mode = Linked List Buffer mode - * <13> 1 RSBinA/L = store Rx status Block in List entry - * <12> 0 1 = Clear count of List Entry after fetching - * <11..10> 00 Address mode = Increment - * <9> 1 Terminate Buffer on RxBound - * <8> 0 Bus Width = 16bits - * <7..0> ? status Bits (write as 0s) - * - * 1110 0010 0000 0000 = 0xe200 - */ - - usc_OutDmaReg( info, RDMR, 0xe200 ); - - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - - /* SETUP TRANSMIT AND RECEIVE DMA BUFFERS */ - - FrameSize = TESTFRAMESIZE; - - /* setup 1st transmit buffer entry: */ - /* with frame size and transmit control word */ - - info->tx_buffer_list[0].count = FrameSize; - info->tx_buffer_list[0].rcc = FrameSize; - info->tx_buffer_list[0].status = 0x4000; - - /* build a transmit frame in 1st transmit DMA buffer */ - - TmpPtr = info->tx_buffer_list[0].virt_addr; - for (i = 0; i < FrameSize; i++ ) - *TmpPtr++ = i; - - /* setup 1st receive buffer entry: */ - /* clear status, set max receive buffer size */ - - info->rx_buffer_list[0].status = 0; - info->rx_buffer_list[0].count = FrameSize + 4; - - /* zero out the 1st receive buffer */ - - memset( info->rx_buffer_list[0].virt_addr, 0, FrameSize + 4 ); - - /* Set count field of next buffer entries to prevent */ - /* 16C32 from using buffers after the 1st one. */ - - info->tx_buffer_list[1].count = 0; - info->rx_buffer_list[1].count = 0; - - - /***************************/ - /* Program 16C32 receiver. */ - /***************************/ - - spin_lock_irqsave(&info->irq_spinlock,flags); - - /* setup DMA transfers */ - usc_RTCmd( info, RTCmd_PurgeRxFifo ); - - /* program 16C32 receiver with physical address of 1st DMA buffer entry */ - phys_addr = info->rx_buffer_list[0].phys_entry; - usc_OutDmaReg( info, NRARL, (unsigned short)phys_addr ); - usc_OutDmaReg( info, NRARU, (unsigned short)(phys_addr >> 16) ); - - /* Clear the Rx DMA status bits (read RDMR) and start channel */ - usc_InDmaReg( info, RDMR ); - usc_DmaCmd( info, DmaCmd_InitRxChannel ); - - /* Enable Receiver (RMR <1..0> = 10) */ - usc_OutReg( info, RMR, (unsigned short)((usc_InReg(info, RMR) & 0xfffc) | 0x0002) ); - - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - - /*************************************************************/ - /* WAIT FOR RECEIVER TO DMA ALL PARAMETERS FROM BUFFER ENTRY */ - /*************************************************************/ - - /* Wait 100ms for interrupt. */ - EndTime = jiffies + msecs_to_jiffies(100); - - for(;;) { - if (time_after(jiffies, EndTime)) { - rc = false; - break; - } - - spin_lock_irqsave(&info->irq_spinlock,flags); - status = usc_InDmaReg( info, RDMR ); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - if ( !(status & BIT4) && (status & BIT5) ) { - /* INITG (BIT 4) is inactive (no entry read in progress) AND */ - /* BUSY (BIT 5) is active (channel still active). */ - /* This means the buffer entry read has completed. */ - break; - } - } - - - /******************************/ - /* Program 16C32 transmitter. */ - /******************************/ - - spin_lock_irqsave(&info->irq_spinlock,flags); - - /* Program the Transmit Character Length Register (TCLR) */ - /* and clear FIFO (TCC is loaded with TCLR on FIFO clear) */ - - usc_OutReg( info, TCLR, (unsigned short)info->tx_buffer_list[0].count ); - usc_RTCmd( info, RTCmd_PurgeTxFifo ); - - /* Program the address of the 1st DMA Buffer Entry in linked list */ - - phys_addr = info->tx_buffer_list[0].phys_entry; - usc_OutDmaReg( info, NTARL, (unsigned short)phys_addr ); - usc_OutDmaReg( info, NTARU, (unsigned short)(phys_addr >> 16) ); - - /* unlatch Tx status bits, and start transmit channel. */ - - usc_OutReg( info, TCSR, (unsigned short)(( usc_InReg(info, TCSR) & 0x0f00) | 0xfa) ); - usc_DmaCmd( info, DmaCmd_InitTxChannel ); - - /* wait for DMA controller to fill transmit FIFO */ - - usc_TCmd( info, TCmd_SelectTicrTxFifostatus ); - - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - - /**********************************/ - /* WAIT FOR TRANSMIT FIFO TO FILL */ - /**********************************/ - - /* Wait 100ms */ - EndTime = jiffies + msecs_to_jiffies(100); - - for(;;) { - if (time_after(jiffies, EndTime)) { - rc = false; - break; - } - - spin_lock_irqsave(&info->irq_spinlock,flags); - FifoLevel = usc_InReg(info, TICR) >> 8; - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - if ( FifoLevel < 16 ) - break; - else - if ( FrameSize < 32 ) { - /* This frame is smaller than the entire transmit FIFO */ - /* so wait for the entire frame to be loaded. */ - if ( FifoLevel <= (32 - FrameSize) ) - break; - } - } - - - if ( rc ) - { - /* Enable 16C32 transmitter. */ - - spin_lock_irqsave(&info->irq_spinlock,flags); - - /* Transmit mode Register (TMR), <1..0> = 10, Enable Transmitter */ - usc_TCmd( info, TCmd_SendFrame ); - usc_OutReg( info, TMR, (unsigned short)((usc_InReg(info, TMR) & 0xfffc) | 0x0002) ); - - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - - /******************************/ - /* WAIT FOR TRANSMIT COMPLETE */ - /******************************/ - - /* Wait 100ms */ - EndTime = jiffies + msecs_to_jiffies(100); - - /* While timer not expired wait for transmit complete */ - - spin_lock_irqsave(&info->irq_spinlock,flags); - status = usc_InReg( info, TCSR ); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - while ( !(status & (BIT6+BIT5+BIT4+BIT2+BIT1)) ) { - if (time_after(jiffies, EndTime)) { - rc = false; - break; - } - - spin_lock_irqsave(&info->irq_spinlock,flags); - status = usc_InReg( info, TCSR ); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - } - } - - - if ( rc ){ - /* CHECK FOR TRANSMIT ERRORS */ - if ( status & (BIT5 + BIT1) ) - rc = false; - } - - if ( rc ) { - /* WAIT FOR RECEIVE COMPLETE */ - - /* Wait 100ms */ - EndTime = jiffies + msecs_to_jiffies(100); - - /* Wait for 16C32 to write receive status to buffer entry. */ - status=info->rx_buffer_list[0].status; - while ( status == 0 ) { - if (time_after(jiffies, EndTime)) { - rc = false; - break; - } - status=info->rx_buffer_list[0].status; - } - } - - - if ( rc ) { - /* CHECK FOR RECEIVE ERRORS */ - status = info->rx_buffer_list[0].status; - - if ( status & (BIT8 + BIT3 + BIT1) ) { - /* receive error has occurred */ - rc = false; - } else { - if ( memcmp( info->tx_buffer_list[0].virt_addr , - info->rx_buffer_list[0].virt_addr, FrameSize ) ){ - rc = false; - } - } - } - - spin_lock_irqsave(&info->irq_spinlock,flags); - usc_reset( info ); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - /* restore current port options */ - memcpy(&info->params,&tmp_params,sizeof(MGSL_PARAMS)); - - return rc; - -} /* end of mgsl_dma_test() */ - -/* mgsl_adapter_test() - * - * Perform the register, IRQ, and DMA tests for the 16C32. - * - * Arguments: info pointer to device instance data - * Return Value: 0 if success, otherwise -ENODEV - */ -static int mgsl_adapter_test( struct mgsl_struct *info ) -{ - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk( "%s(%d):Testing device %s\n", - __FILE__,__LINE__,info->device_name ); - - if ( !mgsl_register_test( info ) ) { - info->init_error = DiagStatus_AddressFailure; - printk( "%s(%d):Register test failure for device %s Addr=%04X\n", - __FILE__,__LINE__,info->device_name, (unsigned short)(info->io_base) ); - return -ENODEV; - } - - if ( !mgsl_irq_test( info ) ) { - info->init_error = DiagStatus_IrqFailure; - printk( "%s(%d):Interrupt test failure for device %s IRQ=%d\n", - __FILE__,__LINE__,info->device_name, (unsigned short)(info->irq_level) ); - return -ENODEV; - } - - if ( !mgsl_dma_test( info ) ) { - info->init_error = DiagStatus_DmaFailure; - printk( "%s(%d):DMA test failure for device %s DMA=%d\n", - __FILE__,__LINE__,info->device_name, (unsigned short)(info->dma_level) ); - return -ENODEV; - } - - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk( "%s(%d):device %s passed diagnostics\n", - __FILE__,__LINE__,info->device_name ); - - return 0; - -} /* end of mgsl_adapter_test() */ - -/* mgsl_memory_test() - * - * Test the shared memory on a PCI adapter. - * - * Arguments: info pointer to device instance data - * Return Value: true if test passed, otherwise false - */ -static bool mgsl_memory_test( struct mgsl_struct *info ) -{ - static unsigned long BitPatterns[] = - { 0x0, 0x55555555, 0xaaaaaaaa, 0x66666666, 0x99999999, 0xffffffff, 0x12345678 }; - unsigned long Patterncount = ARRAY_SIZE(BitPatterns); - unsigned long i; - unsigned long TestLimit = SHARED_MEM_ADDRESS_SIZE/sizeof(unsigned long); - unsigned long * TestAddr; - - if ( info->bus_type != MGSL_BUS_TYPE_PCI ) - return true; - - TestAddr = (unsigned long *)info->memory_base; - - /* Test data lines with test pattern at one location. */ - - for ( i = 0 ; i < Patterncount ; i++ ) { - *TestAddr = BitPatterns[i]; - if ( *TestAddr != BitPatterns[i] ) - return false; - } - - /* Test address lines with incrementing pattern over */ - /* entire address range. */ - - for ( i = 0 ; i < TestLimit ; i++ ) { - *TestAddr = i * 4; - TestAddr++; - } - - TestAddr = (unsigned long *)info->memory_base; - - for ( i = 0 ; i < TestLimit ; i++ ) { - if ( *TestAddr != i * 4 ) - return false; - TestAddr++; - } - - memset( info->memory_base, 0, SHARED_MEM_ADDRESS_SIZE ); - - return true; - -} /* End Of mgsl_memory_test() */ - - -/* mgsl_load_pci_memory() - * - * Load a large block of data into the PCI shared memory. - * Use this instead of memcpy() or memmove() to move data - * into the PCI shared memory. - * - * Notes: - * - * This function prevents the PCI9050 interface chip from hogging - * the adapter local bus, which can starve the 16C32 by preventing - * 16C32 bus master cycles. - * - * The PCI9050 documentation says that the 9050 will always release - * control of the local bus after completing the current read - * or write operation. - * - * It appears that as long as the PCI9050 write FIFO is full, the - * PCI9050 treats all of the writes as a single burst transaction - * and will not release the bus. This causes DMA latency problems - * at high speeds when copying large data blocks to the shared - * memory. - * - * This function in effect, breaks the a large shared memory write - * into multiple transations by interleaving a shared memory read - * which will flush the write FIFO and 'complete' the write - * transation. This allows any pending DMA request to gain control - * of the local bus in a timely fasion. - * - * Arguments: - * - * TargetPtr pointer to target address in PCI shared memory - * SourcePtr pointer to source buffer for data - * count count in bytes of data to copy - * - * Return Value: None - */ -static void mgsl_load_pci_memory( char* TargetPtr, const char* SourcePtr, - unsigned short count ) -{ - /* 16 32-bit writes @ 60ns each = 960ns max latency on local bus */ -#define PCI_LOAD_INTERVAL 64 - - unsigned short Intervalcount = count / PCI_LOAD_INTERVAL; - unsigned short Index; - unsigned long Dummy; - - for ( Index = 0 ; Index < Intervalcount ; Index++ ) - { - memcpy(TargetPtr, SourcePtr, PCI_LOAD_INTERVAL); - Dummy = *((volatile unsigned long *)TargetPtr); - TargetPtr += PCI_LOAD_INTERVAL; - SourcePtr += PCI_LOAD_INTERVAL; - } - - memcpy( TargetPtr, SourcePtr, count % PCI_LOAD_INTERVAL ); - -} /* End Of mgsl_load_pci_memory() */ - -static void mgsl_trace_block(struct mgsl_struct *info,const char* data, int count, int xmit) -{ - int i; - int linecount; - if (xmit) - printk("%s tx data:\n",info->device_name); - else - printk("%s rx data:\n",info->device_name); - - while(count) { - if (count > 16) - linecount = 16; - else - linecount = count; - - for(i=0;i<linecount;i++) - printk("%02X ",(unsigned char)data[i]); - for(;i<17;i++) - printk(" "); - for(i=0;i<linecount;i++) { - if (data[i]>=040 && data[i]<=0176) - printk("%c",data[i]); - else - printk("."); - } - printk("\n"); - - data += linecount; - count -= linecount; - } -} /* end of mgsl_trace_block() */ - -/* mgsl_tx_timeout() - * - * called when HDLC frame times out - * update stats and do tx completion processing - * - * Arguments: context pointer to device instance data - * Return Value: None - */ -static void mgsl_tx_timeout(unsigned long context) -{ - struct mgsl_struct *info = (struct mgsl_struct*)context; - unsigned long flags; - - if ( debug_level >= DEBUG_LEVEL_INFO ) - printk( "%s(%d):mgsl_tx_timeout(%s)\n", - __FILE__,__LINE__,info->device_name); - if(info->tx_active && - (info->params.mode == MGSL_MODE_HDLC || - info->params.mode == MGSL_MODE_RAW) ) { - info->icount.txtimeout++; - } - spin_lock_irqsave(&info->irq_spinlock,flags); - info->tx_active = false; - info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; - - if ( info->params.flags & HDLC_FLAG_HDLC_LOOPMODE ) - usc_loopmode_cancel_transmit( info ); - - spin_unlock_irqrestore(&info->irq_spinlock,flags); - -#if SYNCLINK_GENERIC_HDLC - if (info->netcount) - hdlcdev_tx_done(info); - else -#endif - mgsl_bh_transmit(info); - -} /* end of mgsl_tx_timeout() */ - -/* signal that there are no more frames to send, so that - * line is 'released' by echoing RxD to TxD when current - * transmission is complete (or immediately if no tx in progress). - */ -static int mgsl_loopmode_send_done( struct mgsl_struct * info ) -{ - unsigned long flags; - - spin_lock_irqsave(&info->irq_spinlock,flags); - if (info->params.flags & HDLC_FLAG_HDLC_LOOPMODE) { - if (info->tx_active) - info->loopmode_send_done_requested = true; - else - usc_loopmode_send_done(info); - } - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - return 0; -} - -/* release the line by echoing RxD to TxD - * upon completion of a transmit frame - */ -static void usc_loopmode_send_done( struct mgsl_struct * info ) -{ - info->loopmode_send_done_requested = false; - /* clear CMR:13 to 0 to start echoing RxData to TxData */ - info->cmr_value &= ~BIT13; - usc_OutReg(info, CMR, info->cmr_value); -} - -/* abort a transmit in progress while in HDLC LoopMode - */ -static void usc_loopmode_cancel_transmit( struct mgsl_struct * info ) -{ - /* reset tx dma channel and purge TxFifo */ - usc_RTCmd( info, RTCmd_PurgeTxFifo ); - usc_DmaCmd( info, DmaCmd_ResetTxChannel ); - usc_loopmode_send_done( info ); -} - -/* for HDLC/SDLC LoopMode, setting CMR:13 after the transmitter is enabled - * is an Insert Into Loop action. Upon receipt of a GoAhead sequence (RxAbort) - * we must clear CMR:13 to begin repeating TxData to RxData - */ -static void usc_loopmode_insert_request( struct mgsl_struct * info ) -{ - info->loopmode_insert_requested = true; - - /* enable RxAbort irq. On next RxAbort, clear CMR:13 to - * begin repeating TxData on RxData (complete insertion) - */ - usc_OutReg( info, RICR, - (usc_InReg( info, RICR ) | RXSTATUS_ABORT_RECEIVED ) ); - - /* set CMR:13 to insert into loop on next GoAhead (RxAbort) */ - info->cmr_value |= BIT13; - usc_OutReg(info, CMR, info->cmr_value); -} - -/* return 1 if station is inserted into the loop, otherwise 0 - */ -static int usc_loopmode_active( struct mgsl_struct * info) -{ - return usc_InReg( info, CCSR ) & BIT7 ? 1 : 0 ; -} - -#if SYNCLINK_GENERIC_HDLC - -/** - * called by generic HDLC layer when protocol selected (PPP, frame relay, etc.) - * set encoding and frame check sequence (FCS) options - * - * dev pointer to network device structure - * encoding serial encoding setting - * parity FCS setting - * - * returns 0 if success, otherwise error code - */ -static int hdlcdev_attach(struct net_device *dev, unsigned short encoding, - unsigned short parity) -{ - struct mgsl_struct *info = dev_to_port(dev); - unsigned char new_encoding; - unsigned short new_crctype; - - /* return error if TTY interface open */ - if (info->port.count) - return -EBUSY; - - switch (encoding) - { - case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break; - case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break; - case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break; - case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break; - case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break; - default: return -EINVAL; - } - - switch (parity) - { - case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break; - case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break; - case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break; - default: return -EINVAL; - } - - info->params.encoding = new_encoding; - info->params.crc_type = new_crctype; - - /* if network interface up, reprogram hardware */ - if (info->netcount) - mgsl_program_hw(info); - - return 0; -} - -/** - * called by generic HDLC layer to send frame - * - * skb socket buffer containing HDLC frame - * dev pointer to network device structure - */ -static netdev_tx_t hdlcdev_xmit(struct sk_buff *skb, - struct net_device *dev) -{ - struct mgsl_struct *info = dev_to_port(dev); - unsigned long flags; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name); - - /* stop sending until this frame completes */ - netif_stop_queue(dev); - - /* copy data to device buffers */ - info->xmit_cnt = skb->len; - mgsl_load_tx_dma_buffer(info, skb->data, skb->len); - - /* update network statistics */ - dev->stats.tx_packets++; - dev->stats.tx_bytes += skb->len; - - /* done with socket buffer, so free it */ - dev_kfree_skb(skb); - - /* save start time for transmit timeout detection */ - dev->trans_start = jiffies; - - /* start hardware transmitter if necessary */ - spin_lock_irqsave(&info->irq_spinlock,flags); - if (!info->tx_active) - usc_start_transmitter(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - return NETDEV_TX_OK; -} - -/** - * called by network layer when interface enabled - * claim resources and initialize hardware - * - * dev pointer to network device structure - * - * returns 0 if success, otherwise error code - */ -static int hdlcdev_open(struct net_device *dev) -{ - struct mgsl_struct *info = dev_to_port(dev); - int rc; - unsigned long flags; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name); - - /* generic HDLC layer open processing */ - if ((rc = hdlc_open(dev))) - return rc; - - /* arbitrate between network and tty opens */ - spin_lock_irqsave(&info->netlock, flags); - if (info->port.count != 0 || info->netcount != 0) { - printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name); - spin_unlock_irqrestore(&info->netlock, flags); - return -EBUSY; - } - info->netcount=1; - spin_unlock_irqrestore(&info->netlock, flags); - - /* claim resources and init adapter */ - if ((rc = startup(info)) != 0) { - spin_lock_irqsave(&info->netlock, flags); - info->netcount=0; - spin_unlock_irqrestore(&info->netlock, flags); - return rc; - } - - /* assert DTR and RTS, apply hardware settings */ - info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR; - mgsl_program_hw(info); - - /* enable network layer transmit */ - dev->trans_start = jiffies; - netif_start_queue(dev); - - /* inform generic HDLC layer of current DCD status */ - spin_lock_irqsave(&info->irq_spinlock, flags); - usc_get_serial_signals(info); - spin_unlock_irqrestore(&info->irq_spinlock, flags); - if (info->serial_signals & SerialSignal_DCD) - netif_carrier_on(dev); - else - netif_carrier_off(dev); - return 0; -} - -/** - * called by network layer when interface is disabled - * shutdown hardware and release resources - * - * dev pointer to network device structure - * - * returns 0 if success, otherwise error code - */ -static int hdlcdev_close(struct net_device *dev) -{ - struct mgsl_struct *info = dev_to_port(dev); - unsigned long flags; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name); - - netif_stop_queue(dev); - - /* shutdown adapter and release resources */ - shutdown(info); - - hdlc_close(dev); - - spin_lock_irqsave(&info->netlock, flags); - info->netcount=0; - spin_unlock_irqrestore(&info->netlock, flags); - - return 0; -} - -/** - * called by network layer to process IOCTL call to network device - * - * dev pointer to network device structure - * ifr pointer to network interface request structure - * cmd IOCTL command code - * - * returns 0 if success, otherwise error code - */ -static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) -{ - const size_t size = sizeof(sync_serial_settings); - sync_serial_settings new_line; - sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync; - struct mgsl_struct *info = dev_to_port(dev); - unsigned int flags; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name); - - /* return error if TTY interface open */ - if (info->port.count) - return -EBUSY; - - if (cmd != SIOCWANDEV) - return hdlc_ioctl(dev, ifr, cmd); - - switch(ifr->ifr_settings.type) { - case IF_GET_IFACE: /* return current sync_serial_settings */ - - ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL; - if (ifr->ifr_settings.size < size) { - ifr->ifr_settings.size = size; /* data size wanted */ - return -ENOBUFS; - } - - flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | - HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | - HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | - HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); - - switch (flags){ - case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break; - case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break; - case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break; - case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break; - default: new_line.clock_type = CLOCK_DEFAULT; - } - - new_line.clock_rate = info->params.clock_speed; - new_line.loopback = info->params.loopback ? 1:0; - - if (copy_to_user(line, &new_line, size)) - return -EFAULT; - return 0; - - case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */ - - if(!capable(CAP_NET_ADMIN)) - return -EPERM; - if (copy_from_user(&new_line, line, size)) - return -EFAULT; - - switch (new_line.clock_type) - { - case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break; - case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break; - case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break; - case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break; - case CLOCK_DEFAULT: flags = info->params.flags & - (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | - HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | - HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | - HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break; - default: return -EINVAL; - } - - if (new_line.loopback != 0 && new_line.loopback != 1) - return -EINVAL; - - info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL | - HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN | - HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL | - HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); - info->params.flags |= flags; - - info->params.loopback = new_line.loopback; - - if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG)) - info->params.clock_speed = new_line.clock_rate; - else - info->params.clock_speed = 0; - - /* if network interface up, reprogram hardware */ - if (info->netcount) - mgsl_program_hw(info); - return 0; - - default: - return hdlc_ioctl(dev, ifr, cmd); - } -} - -/** - * called by network layer when transmit timeout is detected - * - * dev pointer to network device structure - */ -static void hdlcdev_tx_timeout(struct net_device *dev) -{ - struct mgsl_struct *info = dev_to_port(dev); - unsigned long flags; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("hdlcdev_tx_timeout(%s)\n",dev->name); - - dev->stats.tx_errors++; - dev->stats.tx_aborted_errors++; - - spin_lock_irqsave(&info->irq_spinlock,flags); - usc_stop_transmitter(info); - spin_unlock_irqrestore(&info->irq_spinlock,flags); - - netif_wake_queue(dev); -} - -/** - * called by device driver when transmit completes - * reenable network layer transmit if stopped - * - * info pointer to device instance information - */ -static void hdlcdev_tx_done(struct mgsl_struct *info) -{ - if (netif_queue_stopped(info->netdev)) - netif_wake_queue(info->netdev); -} - -/** - * called by device driver when frame received - * pass frame to network layer - * - * info pointer to device instance information - * buf pointer to buffer contianing frame data - * size count of data bytes in buf - */ -static void hdlcdev_rx(struct mgsl_struct *info, char *buf, int size) -{ - struct sk_buff *skb = dev_alloc_skb(size); - struct net_device *dev = info->netdev; - - if (debug_level >= DEBUG_LEVEL_INFO) - printk("hdlcdev_rx(%s)\n", dev->name); - - if (skb == NULL) { - printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", - dev->name); - dev->stats.rx_dropped++; - return; - } - - memcpy(skb_put(skb, size), buf, size); - - skb->protocol = hdlc_type_trans(skb, dev); - - dev->stats.rx_packets++; - dev->stats.rx_bytes += size; - - netif_rx(skb); -} - -static const struct net_device_ops hdlcdev_ops = { - .ndo_open = hdlcdev_open, - .ndo_stop = hdlcdev_close, - .ndo_change_mtu = hdlc_change_mtu, - .ndo_start_xmit = hdlc_start_xmit, - .ndo_do_ioctl = hdlcdev_ioctl, - .ndo_tx_timeout = hdlcdev_tx_timeout, -}; - -/** - * called by device driver when adding device instance - * do generic HDLC initialization - * - * info pointer to device instance information - * - * returns 0 if success, otherwise error code - */ -static int hdlcdev_init(struct mgsl_struct *info) -{ - int rc; - struct net_device *dev; - hdlc_device *hdlc; - - /* allocate and initialize network and HDLC layer objects */ - - if (!(dev = alloc_hdlcdev(info))) { - printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__); - return -ENOMEM; - } - - /* for network layer reporting purposes only */ - dev->base_addr = info->io_base; - dev->irq = info->irq_level; - dev->dma = info->dma_level; - - /* network layer callbacks and settings */ - dev->netdev_ops = &hdlcdev_ops; - dev->watchdog_timeo = 10 * HZ; - dev->tx_queue_len = 50; - - /* generic HDLC layer callbacks and settings */ - hdlc = dev_to_hdlc(dev); - hdlc->attach = hdlcdev_attach; - hdlc->xmit = hdlcdev_xmit; - - /* register objects with HDLC layer */ - if ((rc = register_hdlc_device(dev))) { - printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__); - free_netdev(dev); - return rc; - } - - info->netdev = dev; - return 0; -} - -/** - * called by device driver when removing device instance - * do generic HDLC cleanup - * - * info pointer to device instance information - */ -static void hdlcdev_exit(struct mgsl_struct *info) -{ - unregister_hdlc_device(info->netdev); - free_netdev(info->netdev); - info->netdev = NULL; -} - -#endif /* CONFIG_HDLC */ - - -static int __devinit synclink_init_one (struct pci_dev *dev, - const struct pci_device_id *ent) -{ - struct mgsl_struct *info; - - if (pci_enable_device(dev)) { - printk("error enabling pci device %p\n", dev); - return -EIO; - } - - if (!(info = mgsl_allocate_device())) { - printk("can't allocate device instance data.\n"); - return -EIO; - } - - /* Copy user configuration info to device instance data */ - - info->io_base = pci_resource_start(dev, 2); - info->irq_level = dev->irq; - info->phys_memory_base = pci_resource_start(dev, 3); - - /* Because veremap only works on page boundaries we must map - * a larger area than is actually implemented for the LCR - * memory range. We map a full page starting at the page boundary. - */ - info->phys_lcr_base = pci_resource_start(dev, 0); - info->lcr_offset = info->phys_lcr_base & (PAGE_SIZE-1); - info->phys_lcr_base &= ~(PAGE_SIZE-1); - - info->bus_type = MGSL_BUS_TYPE_PCI; - info->io_addr_size = 8; - info->irq_flags = IRQF_SHARED; - - if (dev->device == 0x0210) { - /* Version 1 PCI9030 based universal PCI adapter */ - info->misc_ctrl_value = 0x007c4080; - info->hw_version = 1; - } else { - /* Version 0 PCI9050 based 5V PCI adapter - * A PCI9050 bug prevents reading LCR registers if - * LCR base address bit 7 is set. Maintain shadow - * value so we can write to LCR misc control reg. - */ - info->misc_ctrl_value = 0x087e4546; - info->hw_version = 0; - } - - mgsl_add_device(info); - - return 0; -} - -static void __devexit synclink_remove_one (struct pci_dev *dev) -{ -} - |