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Diffstat (limited to 'drivers/net/ks8851_mll.c')
| -rw-r--r-- | drivers/net/ks8851_mll.c | 1697 |
1 files changed, 1697 insertions, 0 deletions
diff --git a/drivers/net/ks8851_mll.c b/drivers/net/ks8851_mll.c new file mode 100644 index 000000000000..0be14d702beb --- /dev/null +++ b/drivers/net/ks8851_mll.c @@ -0,0 +1,1697 @@ +/** + * drivers/net/ks8851_mll.c + * Copyright (c) 2009 Micrel Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/** + * Supports: + * KS8851 16bit MLL chip from Micrel Inc. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/ethtool.h> +#include <linux/cache.h> +#include <linux/crc32.h> +#include <linux/mii.h> +#include <linux/platform_device.h> +#include <linux/delay.h> + +#define DRV_NAME "ks8851_mll" + +static u8 KS_DEFAULT_MAC_ADDRESS[] = { 0x00, 0x10, 0xA1, 0x86, 0x95, 0x11 }; +#define MAX_RECV_FRAMES 32 +#define MAX_BUF_SIZE 2048 +#define TX_BUF_SIZE 2000 +#define RX_BUF_SIZE 2000 + +#define KS_CCR 0x08 +#define CCR_EEPROM (1 << 9) +#define CCR_SPI (1 << 8) +#define CCR_8BIT (1 << 7) +#define CCR_16BIT (1 << 6) +#define CCR_32BIT (1 << 5) +#define CCR_SHARED (1 << 4) +#define CCR_32PIN (1 << 0) + +/* MAC address registers */ +#define KS_MARL 0x10 +#define KS_MARM 0x12 +#define KS_MARH 0x14 + +#define KS_OBCR 0x20 +#define OBCR_ODS_16MA (1 << 6) + +#define KS_EEPCR 0x22 +#define EEPCR_EESA (1 << 4) +#define EEPCR_EESB (1 << 3) +#define EEPCR_EEDO (1 << 2) +#define EEPCR_EESCK (1 << 1) +#define EEPCR_EECS (1 << 0) + +#define KS_MBIR 0x24 +#define MBIR_TXMBF (1 << 12) +#define MBIR_TXMBFA (1 << 11) +#define MBIR_RXMBF (1 << 4) +#define MBIR_RXMBFA (1 << 3) + +#define KS_GRR 0x26 +#define GRR_QMU (1 << 1) +#define GRR_GSR (1 << 0) + +#define KS_WFCR 0x2A +#define WFCR_MPRXE (1 << 7) +#define WFCR_WF3E (1 << 3) +#define WFCR_WF2E (1 << 2) +#define WFCR_WF1E (1 << 1) +#define WFCR_WF0E (1 << 0) + +#define KS_WF0CRC0 0x30 +#define KS_WF0CRC1 0x32 +#define KS_WF0BM0 0x34 +#define KS_WF0BM1 0x36 +#define KS_WF0BM2 0x38 +#define KS_WF0BM3 0x3A + +#define KS_WF1CRC0 0x40 +#define KS_WF1CRC1 0x42 +#define KS_WF1BM0 0x44 +#define KS_WF1BM1 0x46 +#define KS_WF1BM2 0x48 +#define KS_WF1BM3 0x4A + +#define KS_WF2CRC0 0x50 +#define KS_WF2CRC1 0x52 +#define KS_WF2BM0 0x54 +#define KS_WF2BM1 0x56 +#define KS_WF2BM2 0x58 +#define KS_WF2BM3 0x5A + +#define KS_WF3CRC0 0x60 +#define KS_WF3CRC1 0x62 +#define KS_WF3BM0 0x64 +#define KS_WF3BM1 0x66 +#define KS_WF3BM2 0x68 +#define KS_WF3BM3 0x6A + +#define KS_TXCR 0x70 +#define TXCR_TCGICMP (1 << 8) +#define TXCR_TCGUDP (1 << 7) +#define TXCR_TCGTCP (1 << 6) +#define TXCR_TCGIP (1 << 5) +#define TXCR_FTXQ (1 << 4) +#define TXCR_TXFCE (1 << 3) +#define TXCR_TXPE (1 << 2) +#define TXCR_TXCRC (1 << 1) +#define TXCR_TXE (1 << 0) + +#define KS_TXSR 0x72 +#define TXSR_TXLC (1 << 13) +#define TXSR_TXMC (1 << 12) +#define TXSR_TXFID_MASK (0x3f << 0) +#define TXSR_TXFID_SHIFT (0) +#define TXSR_TXFID_GET(_v) (((_v) >> 0) & 0x3f) + + +#define KS_RXCR1 0x74 +#define RXCR1_FRXQ (1 << 15) +#define RXCR1_RXUDPFCC (1 << 14) +#define RXCR1_RXTCPFCC (1 << 13) +#define RXCR1_RXIPFCC (1 << 12) +#define RXCR1_RXPAFMA (1 << 11) +#define RXCR1_RXFCE (1 << 10) +#define RXCR1_RXEFE (1 << 9) +#define RXCR1_RXMAFMA (1 << 8) +#define RXCR1_RXBE (1 << 7) +#define RXCR1_RXME (1 << 6) +#define RXCR1_RXUE (1 << 5) +#define RXCR1_RXAE (1 << 4) +#define RXCR1_RXINVF (1 << 1) +#define RXCR1_RXE (1 << 0) +#define RXCR1_FILTER_MASK (RXCR1_RXINVF | RXCR1_RXAE | \ + RXCR1_RXMAFMA | RXCR1_RXPAFMA) + +#define KS_RXCR2 0x76 +#define RXCR2_SRDBL_MASK (0x7 << 5) +#define RXCR2_SRDBL_SHIFT (5) +#define RXCR2_SRDBL_4B (0x0 << 5) +#define RXCR2_SRDBL_8B (0x1 << 5) +#define RXCR2_SRDBL_16B (0x2 << 5) +#define RXCR2_SRDBL_32B (0x3 << 5) +/* #define RXCR2_SRDBL_FRAME (0x4 << 5) */ +#define RXCR2_IUFFP (1 << 4) +#define RXCR2_RXIUFCEZ (1 << 3) +#define RXCR2_UDPLFE (1 << 2) +#define RXCR2_RXICMPFCC (1 << 1) +#define RXCR2_RXSAF (1 << 0) + +#define KS_TXMIR 0x78 + +#define KS_RXFHSR 0x7C +#define RXFSHR_RXFV (1 << 15) +#define RXFSHR_RXICMPFCS (1 << 13) +#define RXFSHR_RXIPFCS (1 << 12) +#define RXFSHR_RXTCPFCS (1 << 11) +#define RXFSHR_RXUDPFCS (1 << 10) +#define RXFSHR_RXBF (1 << 7) +#define RXFSHR_RXMF (1 << 6) +#define RXFSHR_RXUF (1 << 5) +#define RXFSHR_RXMR (1 << 4) +#define RXFSHR_RXFT (1 << 3) +#define RXFSHR_RXFTL (1 << 2) +#define RXFSHR_RXRF (1 << 1) +#define RXFSHR_RXCE (1 << 0) +#define RXFSHR_ERR (RXFSHR_RXCE | RXFSHR_RXRF |\ + RXFSHR_RXFTL | RXFSHR_RXMR |\ + RXFSHR_RXICMPFCS | RXFSHR_RXIPFCS |\ + RXFSHR_RXTCPFCS) +#define KS_RXFHBCR 0x7E +#define RXFHBCR_CNT_MASK 0x0FFF + +#define KS_TXQCR 0x80 +#define TXQCR_AETFE (1 << 2) +#define TXQCR_TXQMAM (1 << 1) +#define TXQCR_METFE (1 << 0) + +#define KS_RXQCR 0x82 +#define RXQCR_RXDTTS (1 << 12) +#define RXQCR_RXDBCTS (1 << 11) +#define RXQCR_RXFCTS (1 << 10) +#define RXQCR_RXIPHTOE (1 << 9) +#define RXQCR_RXDTTE (1 << 7) +#define RXQCR_RXDBCTE (1 << 6) +#define RXQCR_RXFCTE (1 << 5) +#define RXQCR_ADRFE (1 << 4) +#define RXQCR_SDA (1 << 3) +#define RXQCR_RRXEF (1 << 0) +#define RXQCR_CMD_CNTL (RXQCR_RXFCTE|RXQCR_ADRFE) + +#define KS_TXFDPR 0x84 +#define TXFDPR_TXFPAI (1 << 14) +#define TXFDPR_TXFP_MASK (0x7ff << 0) +#define TXFDPR_TXFP_SHIFT (0) + +#define KS_RXFDPR 0x86 +#define RXFDPR_RXFPAI (1 << 14) + +#define KS_RXDTTR 0x8C +#define KS_RXDBCTR 0x8E + +#define KS_IER 0x90 +#define KS_ISR 0x92 +#define IRQ_LCI (1 << 15) +#define IRQ_TXI (1 << 14) +#define IRQ_RXI (1 << 13) +#define IRQ_RXOI (1 << 11) +#define IRQ_TXPSI (1 << 9) +#define IRQ_RXPSI (1 << 8) +#define IRQ_TXSAI (1 << 6) +#define IRQ_RXWFDI (1 << 5) +#define IRQ_RXMPDI (1 << 4) +#define IRQ_LDI (1 << 3) +#define IRQ_EDI (1 << 2) +#define IRQ_SPIBEI (1 << 1) +#define IRQ_DEDI (1 << 0) + +#define KS_RXFCTR 0x9C +#define RXFCTR_THRESHOLD_MASK 0x00FF + +#define KS_RXFC 0x9D +#define RXFCTR_RXFC_MASK (0xff << 8) +#define RXFCTR_RXFC_SHIFT (8) +#define RXFCTR_RXFC_GET(_v) (((_v) >> 8) & 0xff) +#define RXFCTR_RXFCT_MASK (0xff << 0) +#define RXFCTR_RXFCT_SHIFT (0) + +#define KS_TXNTFSR 0x9E + +#define KS_MAHTR0 0xA0 +#define KS_MAHTR1 0xA2 +#define KS_MAHTR2 0xA4 +#define KS_MAHTR3 0xA6 + +#define KS_FCLWR 0xB0 +#define KS_FCHWR 0xB2 +#define KS_FCOWR 0xB4 + +#define KS_CIDER 0xC0 +#define CIDER_ID 0x8870 +#define CIDER_REV_MASK (0x7 << 1) +#define CIDER_REV_SHIFT (1) +#define CIDER_REV_GET(_v) (((_v) >> 1) & 0x7) + +#define KS_CGCR 0xC6 +#define KS_IACR 0xC8 +#define IACR_RDEN (1 << 12) +#define IACR_TSEL_MASK (0x3 << 10) +#define IACR_TSEL_SHIFT (10) +#define IACR_TSEL_MIB (0x3 << 10) +#define IACR_ADDR_MASK (0x1f << 0) +#define IACR_ADDR_SHIFT (0) + +#define KS_IADLR 0xD0 +#define KS_IAHDR 0xD2 + +#define KS_PMECR 0xD4 +#define PMECR_PME_DELAY (1 << 14) +#define PMECR_PME_POL (1 << 12) +#define PMECR_WOL_WAKEUP (1 << 11) +#define PMECR_WOL_MAGICPKT (1 << 10) +#define PMECR_WOL_LINKUP (1 << 9) +#define PMECR_WOL_ENERGY (1 << 8) +#define PMECR_AUTO_WAKE_EN (1 << 7) +#define PMECR_WAKEUP_NORMAL (1 << 6) +#define PMECR_WKEVT_MASK (0xf << 2) +#define PMECR_WKEVT_SHIFT (2) +#define PMECR_WKEVT_GET(_v) (((_v) >> 2) & 0xf) +#define PMECR_WKEVT_ENERGY (0x1 << 2) +#define PMECR_WKEVT_LINK (0x2 << 2) +#define PMECR_WKEVT_MAGICPKT (0x4 << 2) +#define PMECR_WKEVT_FRAME (0x8 << 2) +#define PMECR_PM_MASK (0x3 << 0) +#define PMECR_PM_SHIFT (0) +#define PMECR_PM_NORMAL (0x0 << 0) +#define PMECR_PM_ENERGY (0x1 << 0) +#define PMECR_PM_SOFTDOWN (0x2 << 0) +#define PMECR_PM_POWERSAVE (0x3 << 0) + +/* Standard MII PHY data */ +#define KS_P1MBCR 0xE4 +#define P1MBCR_FORCE_FDX (1 << 8) + +#define KS_P1MBSR 0xE6 +#define P1MBSR_AN_COMPLETE (1 << 5) +#define P1MBSR_AN_CAPABLE (1 << 3) +#define P1MBSR_LINK_UP (1 << 2) + +#define KS_PHY1ILR 0xE8 +#define KS_PHY1IHR 0xEA +#define KS_P1ANAR 0xEC +#define KS_P1ANLPR 0xEE + +#define KS_P1SCLMD 0xF4 +#define P1SCLMD_LEDOFF (1 << 15) +#define P1SCLMD_TXIDS (1 << 14) +#define P1SCLMD_RESTARTAN (1 << 13) +#define P1SCLMD_DISAUTOMDIX (1 << 10) +#define P1SCLMD_FORCEMDIX (1 << 9) +#define P1SCLMD_AUTONEGEN (1 << 7) +#define P1SCLMD_FORCE100 (1 << 6) +#define P1SCLMD_FORCEFDX (1 << 5) +#define P1SCLMD_ADV_FLOW (1 << 4) +#define P1SCLMD_ADV_100BT_FDX (1 << 3) +#define P1SCLMD_ADV_100BT_HDX (1 << 2) +#define P1SCLMD_ADV_10BT_FDX (1 << 1) +#define P1SCLMD_ADV_10BT_HDX (1 << 0) + +#define KS_P1CR 0xF6 +#define P1CR_HP_MDIX (1 << 15) +#define P1CR_REV_POL (1 << 13) +#define P1CR_OP_100M (1 << 10) +#define P1CR_OP_FDX (1 << 9) +#define P1CR_OP_MDI (1 << 7) +#define P1CR_AN_DONE (1 << 6) +#define P1CR_LINK_GOOD (1 << 5) +#define P1CR_PNTR_FLOW (1 << 4) +#define P1CR_PNTR_100BT_FDX (1 << 3) +#define P1CR_PNTR_100BT_HDX (1 << 2) +#define P1CR_PNTR_10BT_FDX (1 << 1) +#define P1CR_PNTR_10BT_HDX (1 << 0) + +/* TX Frame control */ + +#define TXFR_TXIC (1 << 15) +#define TXFR_TXFID_MASK (0x3f << 0) +#define TXFR_TXFID_SHIFT (0) + +#define KS_P1SR 0xF8 +#define P1SR_HP_MDIX (1 << 15) +#define P1SR_REV_POL (1 << 13) +#define P1SR_OP_100M (1 << 10) +#define P1SR_OP_FDX (1 << 9) +#define P1SR_OP_MDI (1 << 7) +#define P1SR_AN_DONE (1 << 6) +#define P1SR_LINK_GOOD (1 << 5) +#define P1SR_PNTR_FLOW (1 << 4) +#define P1SR_PNTR_100BT_FDX (1 << 3) +#define P1SR_PNTR_100BT_HDX (1 << 2) +#define P1SR_PNTR_10BT_FDX (1 << 1) +#define P1SR_PNTR_10BT_HDX (1 << 0) + +#define ENUM_BUS_NONE 0 +#define ENUM_BUS_8BIT 1 +#define ENUM_BUS_16BIT 2 +#define ENUM_BUS_32BIT 3 + +#define MAX_MCAST_LST 32 +#define HW_MCAST_SIZE 8 +#define MAC_ADDR_LEN 6 + +/** + * union ks_tx_hdr - tx header data + * @txb: The header as bytes + * @txw: The header as 16bit, little-endian words + * + * A dual representation of the tx header data to allow + * access to individual bytes, and to allow 16bit accesses + * with 16bit alignment. + */ +union ks_tx_hdr { + u8 txb[4]; + __le16 txw[2]; +}; + +/** + * struct ks_net - KS8851 driver private data + * @net_device : The network device we're bound to + * @hw_addr : start address of data register. + * @hw_addr_cmd : start address of command register. + * @txh : temporaly buffer to save status/length. + * @lock : Lock to ensure that the device is not accessed when busy. + * @pdev : Pointer to platform device. + * @mii : The MII state information for the mii calls. + * @frame_head_info : frame header information for multi-pkt rx. + * @statelock : Lock on this structure for tx list. + * @msg_enable : The message flags controlling driver output (see ethtool). + * @frame_cnt : number of frames received. + * @bus_width : i/o bus width. + * @irq : irq number assigned to this device. + * @rc_rxqcr : Cached copy of KS_RXQCR. + * @rc_txcr : Cached copy of KS_TXCR. + * @rc_ier : Cached copy of KS_IER. + * @sharedbus : Multipex(addr and data bus) mode indicator. + * @cmd_reg_cache : command register cached. + * @cmd_reg_cache_int : command register cached. Used in the irq handler. + * @promiscuous : promiscuous mode indicator. + * @all_mcast : mutlicast indicator. + * @mcast_lst_size : size of multicast list. + * @mcast_lst : multicast list. + * @mcast_bits : multicast enabed. + * @mac_addr : MAC address assigned to this device. + * @fid : frame id. + * @extra_byte : number of extra byte prepended rx pkt. + * @enabled : indicator this device works. + * + * The @lock ensures that the chip is protected when certain operations are + * in progress. When the read or write packet transfer is in progress, most + * of the chip registers are not accessible until the transfer is finished and + * the DMA has been de-asserted. + * + * The @statelock is used to protect information in the structure which may + * need to be accessed via several sources, such as the network driver layer + * or one of the work queues. + * + */ + +/* Receive multiplex framer header info */ +struct type_frame_head { + u16 sts; /* Frame status */ + u16 len; /* Byte count */ +}; + +struct ks_net { + struct net_device *netdev; + void __iomem *hw_addr; + void __iomem *hw_addr_cmd; + union ks_tx_hdr txh ____cacheline_aligned; + struct mutex lock; /* spinlock to be interrupt safe */ + struct platform_device *pdev; + struct mii_if_info mii; + struct type_frame_head *frame_head_info; + spinlock_t statelock; + u32 msg_enable; + u32 frame_cnt; + int bus_width; + int irq; + + u16 rc_rxqcr; + u16 rc_txcr; + u16 rc_ier; + u16 sharedbus; + u16 cmd_reg_cache; + u16 cmd_reg_cache_int; + u16 promiscuous; + u16 all_mcast; + u16 mcast_lst_size; + u8 mcast_lst[MAX_MCAST_LST][MAC_ADDR_LEN]; + u8 mcast_bits[HW_MCAST_SIZE]; + u8 mac_addr[6]; + u8 fid; + u8 extra_byte; + u8 enabled; +}; + +static int msg_enable; + +#define ks_info(_ks, _msg...) dev_info(&(_ks)->pdev->dev, _msg) +#define ks_warn(_ks, _msg...) dev_warn(&(_ks)->pdev->dev, _msg) +#define ks_dbg(_ks, _msg...) dev_dbg(&(_ks)->pdev->dev, _msg) +#define ks_err(_ks, _msg...) dev_err(&(_ks)->pdev->dev, _msg) + +#define BE3 0x8000 /* Byte Enable 3 */ +#define BE2 0x4000 /* Byte Enable 2 */ +#define BE1 0x2000 /* Byte Enable 1 */ +#define BE0 0x1000 /* Byte Enable 0 */ + +/** + * register read/write calls. + * + * All these calls issue transactions to access the chip's registers. They + * all require that the necessary lock is held to prevent accesses when the + * chip is busy transfering packet data (RX/TX FIFO accesses). + */ + +/** + * ks_rdreg8 - read 8 bit register from device + * @ks : The chip information + * @offset: The register address + * + * Read a 8bit register from the chip, returning the result + */ +static u8 ks_rdreg8(struct ks_net *ks, int offset) +{ + u16 data; + u8 shift_bit = offset & 0x03; + u8 shift_data = (offset & 1) << 3; + ks->cmd_reg_cache = (u16) offset | (u16)(BE0 << shift_bit); + iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd); + data = ioread16(ks->hw_addr); + return (u8)(data >> shift_data); +} + +/** + * ks_rdreg16 - read 16 bit register from device + * @ks : The chip information + * @offset: The register address + * + * Read a 16bit register from the chip, returning the result + */ + +static u16 ks_rdreg16(struct ks_net *ks, int offset) +{ + ks->cmd_reg_cache = (u16)offset | ((BE1 | BE0) << (offset & 0x02)); + iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd); + return ioread16(ks->hw_addr); +} + +/** + * ks_wrreg8 - write 8bit register value to chip + * @ks: The chip information + * @offset: The register address + * @value: The value to write + * + */ +static void ks_wrreg8(struct ks_net *ks, int offset, u8 value) +{ + u8 shift_bit = (offset & 0x03); + u16 value_write = (u16)(value << ((offset & 1) << 3)); + ks->cmd_reg_cache = (u16)offset | (BE0 << shift_bit); + iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd); + iowrite16(value_write, ks->hw_addr); +} + +/** + * ks_wrreg16 - write 16bit register value to chip + * @ks: The chip information + * @offset: The register address + * @value: The value to write + * + */ + +static void ks_wrreg16(struct ks_net *ks, int offset, u16 value) +{ + ks->cmd_reg_cache = (u16)offset | ((BE1 | BE0) << (offset & 0x02)); + iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd); + iowrite16(value, ks->hw_addr); +} + +/** + * ks_inblk - read a block of data from QMU. This is called after sudo DMA mode enabled. + * @ks: The chip state + * @wptr: buffer address to save data + * @len: length in byte to read + * + */ +static inline void ks_inblk(struct ks_net *ks, u16 *wptr, u32 len) +{ + len >>= 1; + while (len--) + *wptr++ = (u16)ioread16(ks->hw_addr); +} + +/** + * ks_outblk - write data to QMU. This is called after sudo DMA mode enabled. + * @ks: The chip information + * @wptr: buffer address + * @len: length in byte to write + * + */ +static inline void ks_outblk(struct ks_net *ks, u16 *wptr, u32 len) +{ + len >>= 1; + while (len--) + iowrite16(*wptr++, ks->hw_addr); +} + +/** + * ks_tx_fifo_space - return the available hardware buffer size. + * @ks: The chip information + * + */ +static inline u16 ks_tx_fifo_space(struct ks_net *ks) +{ + return ks_rdreg16(ks, KS_TXMIR) & 0x1fff; +} + +/** + * ks_save_cmd_reg - save the command register from the cache. + * @ks: The chip information + * + */ +static inline void ks_save_cmd_reg(struct ks_net *ks) +{ + /*ks8851 MLL has a bug to read back the command register. + * So rely on software to save the content of command register. + */ + ks->cmd_reg_cache_int = ks->cmd_reg_cache; +} + +/** + * ks_restore_cmd_reg - restore the command register from the cache and + * write to hardware register. + * @ks: The chip information + * + */ +static inline void ks_restore_cmd_reg(struct ks_net *ks) +{ + ks->cmd_reg_cache = ks->cmd_reg_cache_int; + iowrite16(ks->cmd_reg_cache, ks->hw_addr_cmd); +} + +/** + * ks_set_powermode - set power mode of the device + * @ks: The chip information + * @pwrmode: The power mode value to write to KS_PMECR. + * + * Change the power mode of the chip. + */ +static void ks_set_powermode(struct ks_net *ks, unsigned pwrmode) +{ + unsigned pmecr; + + if (netif_msg_hw(ks)) + ks_dbg(ks, "setting power mode %d\n", pwrmode); + + ks_rdreg16(ks, KS_GRR); + pmecr = ks_rdreg16(ks, KS_PMECR); + pmecr &= ~PMECR_PM_MASK; + pmecr |= pwrmode; + + ks_wrreg16(ks, KS_PMECR, pmecr); +} + +/** + * ks_read_config - read chip configuration of bus width. + * @ks: The chip information + * + */ +static void ks_read_config(struct ks_net *ks) +{ + u16 reg_data = 0; + + /* Regardless of bus width, 8 bit read should always work.*/ + reg_data = ks_rdreg8(ks, KS_CCR) & 0x00FF; + reg_data |= ks_rdreg8(ks, KS_CCR+1) << 8; + + /* addr/data bus are multiplexed */ + ks->sharedbus = (reg_data & CCR_SHARED) == CCR_SHARED; + + /* There are garbage data when reading data from QMU, + depending on bus-width. + */ + + if (reg_data & CCR_8BIT) { + ks->bus_width = ENUM_BUS_8BIT; + ks->extra_byte = 1; + } else if (reg_data & CCR_16BIT) { + ks->bus_width = ENUM_BUS_16BIT; + ks->extra_byte = 2; + } else { + ks->bus_width = ENUM_BUS_32BIT; + ks->extra_byte = 4; + } +} + +/** + * ks_soft_reset - issue one of the soft reset to the device + * @ks: The device state. + * @op: The bit(s) to set in the GRR + * + * Issue the relevant soft-reset command to the device's GRR register + * specified by @op. + * + * Note, the delays are in there as a caution to ensure that the reset + * has time to take effect and then complete. Since the datasheet does + * not currently specify the exact sequence, we have chosen something + * that seems to work with our device. + */ +static void ks_soft_reset(struct ks_net *ks, unsigned op) +{ + /* Disable interrupt first */ + ks_wrreg16(ks, KS_IER, 0x0000); + ks_wrreg16(ks, KS_GRR, op); + mdelay(10); /* wait a short time to effect reset */ + ks_wrreg16(ks, KS_GRR, 0); + mdelay(1); /* wait for condition to clear */ +} + + +/** + * ks_read_qmu - read 1 pkt data from the QMU. + * @ks: The chip information + * @buf: buffer address to save 1 pkt + * @len: Pkt length + * Here is the sequence to read 1 pkt: + * 1. set sudo DMA mode + * 2. read prepend data + * 3. read pkt data + * 4. reset sudo DMA Mode + */ +static inline void ks_read_qmu(struct ks_net *ks, u16 *buf, u32 len) +{ + u32 r = ks->extra_byte & 0x1 ; + u32 w = ks->extra_byte - r; + + /* 1. set sudo DMA mode */ + ks_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI); + ks_wrreg8(ks, KS_RXQCR, (ks->rc_rxqcr | RXQCR_SDA) & 0xff); + + /* 2. read prepend data */ + /** + * read 4 + extra bytes and discard them. + * extra bytes for dummy, 2 for status, 2 for len + */ + + /* use likely(r) for 8 bit access for performance */ + if (unlikely(r)) + ioread8(ks->hw_addr); + ks_inblk(ks, buf, w + 2 + 2); + + /* 3. read pkt data */ + ks_inblk(ks, buf, ALIGN(len, 4)); + + /* 4. reset sudo DMA Mode */ + ks_wrreg8(ks, KS_RXQCR, ks->rc_rxqcr); +} + +/** + * ks_rcv - read multiple pkts data from the QMU. + * @ks: The chip information + * @netdev: The network device being opened. + * + * Read all of header information before reading pkt content. + * It is not allowed only port of pkts in QMU after issuing + * interrupt ack. + */ +static void ks_rcv(struct ks_net *ks, struct net_device *netdev) +{ + u32 i; + struct type_frame_head *frame_hdr = ks->frame_head_info; + struct sk_buff *skb; + + ks->frame_cnt = ks_rdreg16(ks, KS_RXFCTR) >> 8; + + /* read all header information */ + for (i = 0; i < ks->frame_cnt; i++) { + /* Checking Received packet status */ + frame_hdr->sts = ks_rdreg16(ks, KS_RXFHSR); + /* Get packet len from hardware */ + frame_hdr->len = ks_rdreg16(ks, KS_RXFHBCR); + frame_hdr++; + } + + frame_hdr = ks->frame_head_info; + while (ks->frame_cnt--) { + skb = dev_alloc_skb(frame_hdr->len + 16); + if (likely(skb && (frame_hdr->sts & RXFSHR_RXFV) && + (frame_hdr->len < RX_BUF_SIZE) && frame_hdr->len)) { + skb_reserve(skb, 2); + /* read data block including CRC 4 bytes */ + ks_read_qmu(ks, (u16 *)skb->data, frame_hdr->len + 4); + skb_put(skb, frame_hdr->len); + skb->dev = netdev; + skb->protocol = eth_type_trans(skb, netdev); + netif_rx(skb); + } else { + printk(KERN_ERR "%s: err:skb alloc\n", __func__); + ks_wrreg16(ks, KS_RXQCR, (ks->rc_rxqcr | RXQCR_RRXEF)); + if (skb) + dev_kfree_skb_irq(skb); + } + frame_hdr++; + } +} + +/** + * ks_update_link_status - link status update. + * @netdev: The network device being opened. + * @ks: The chip information + * + */ + +static void ks_update_link_status(struct net_device *netdev, struct ks_net *ks) +{ + /* check the status of the link */ + u32 link_up_status; + if (ks_rdreg16(ks, KS_P1SR) & P1SR_LINK_GOOD) { + netif_carrier_on(netdev); + link_up_status = true; + } else { + netif_carrier_off(netdev); + link_up_status = false; + } + if (netif_msg_link(ks)) + ks_dbg(ks, "%s: %s\n", + __func__, link_up_status ? "UP" : "DOWN"); +} + +/** + * ks_irq - device interrupt handler + * @irq: Interrupt number passed from the IRQ hnalder. + * @pw: The private word passed to register_irq(), our struct ks_net. + * + * This is the handler invoked to find out what happened + * + * Read the interrupt status, work out what needs to be done and then clear + * any of the interrupts that are not needed. + */ + +static irqreturn_t ks_irq(int irq, void *pw) +{ + struct ks_net *ks = pw; + struct net_device *netdev = ks->netdev; + u16 status; + + /*this should be the first in IRQ handler */ + ks_save_cmd_reg(ks); + + status = ks_rdreg16(ks, KS_ISR); + if (unlikely(!status)) { + ks_restore_cmd_reg(ks); + return IRQ_NONE; + } + + ks_wrreg16(ks, KS_ISR, status); + + if (likely(status & IRQ_RXI)) + ks_rcv(ks, netdev); + + if (unlikely(status & IRQ_LCI)) + ks_update_link_status(netdev, ks); + + if (unlikely(status & IRQ_TXI)) + netif_wake_queue(netdev); + + if (unlikely(status & IRQ_LDI)) { + + u16 pmecr = ks_rdreg16(ks, KS_PMECR); + pmecr &= ~PMECR_WKEVT_MASK; + ks_wrreg16(ks, KS_PMECR, pmecr | PMECR_WKEVT_LINK); + } + + /* this should be the last in IRQ handler*/ + ks_restore_cmd_reg(ks); + return IRQ_HANDLED; +} + + +/** + * ks_net_open - open network device + * @netdev: The network device being opened. + * + * Called when the network device is marked active, such as a user executing + * 'ifconfig up' on the device. + */ +static int ks_net_open(struct net_device *netdev) +{ + struct ks_net *ks = netdev_priv(netdev); + int err; + +#define KS_INT_FLAGS (IRQF_DISABLED|IRQF_TRIGGER_LOW) + /* lock the card, even if we may not actually do anything + * else at the moment. + */ + + if (netif_msg_ifup(ks)) + ks_dbg(ks, "%s - entry\n", __func__); + + /* reset the HW */ + err = request_irq(ks->irq, ks_irq, KS_INT_FLAGS, DRV_NAME, ks); + + if (err) { + printk(KERN_ERR "Failed to request IRQ: %d: %d\n", + ks->irq, err); + return err; + } + + if (netif_msg_ifup(ks)) + ks_dbg(ks, "network device %s up\n", netdev->name); + + return 0; +} + +/** + * ks_net_stop - close network device + * @netdev: The device being closed. + * + * Called to close down a network device which has been active. Cancell any + * work, shutdown the RX and TX process and then place the chip into a low + * power state whilst it is not being used. + */ +static int ks_net_stop(struct net_device *netdev) +{ + struct ks_net *ks = netdev_priv(netdev); + + if (netif_msg_ifdown(ks)) + ks_info(ks, "%s: shutting down\n", netdev->name); + + netif_stop_queue(netdev); + + kfree(ks->frame_head_info); + + mutex_lock(&ks->lock); + + /* turn off the IRQs and ack any outstanding */ + ks_wrreg16(ks, KS_IER, 0x0000); + ks_wrreg16(ks, KS_ISR, 0xffff); + + /* shutdown RX process */ + ks_wrreg16(ks, KS_RXCR1, 0x0000); + + /* shutdown TX process */ + ks_wrreg16(ks, KS_TXCR, 0x0000); + + /* set powermode to soft power down to save power */ + ks_set_powermode(ks, PMECR_PM_SOFTDOWN); + free_irq(ks->irq, netdev); + mutex_unlock(&ks->lock); + return 0; +} + + +/** + * ks_write_qmu - write 1 pkt data to the QMU. + * @ks: The chip information + * @pdata: buffer address to save 1 pkt + * @len: Pkt length in byte + * Here is the sequence to write 1 pkt: + * 1. set sudo DMA mode + * 2. write status/length + * 3. write pkt data + * 4. reset sudo DMA Mode + * 5. reset sudo DMA mode + * 6. Wait until pkt is out + */ +static void ks_write_qmu(struct ks_net *ks, u8 *pdata, u16 len) +{ + unsigned fid = ks->fid; + + fid = ks->fid; + ks->fid = (ks->fid + 1) & TXFR_TXFID_MASK; + + /* reduce the tx interrupt occurrances. */ + if (!fid) + fid |= TXFR_TXIC; /* irq on completion */ + + /* start header at txb[0] to align txw entries */ + ks->txh.txw[0] = cpu_to_le16(fid); + ks->txh.txw[1] = cpu_to_le16(len); + + /* 1. set sudo-DMA mode */ + ks_wrreg8(ks, KS_RXQCR, (ks->rc_rxqcr | RXQCR_SDA) & 0xff); + /* 2. write status/lenth info */ + ks_outblk(ks, ks->txh.txw, 4); + /* 3. write pkt data */ + ks_outblk(ks, (u16 *)pdata, ALIGN(len, 4)); + /* 4. reset sudo-DMA mode */ + ks_wrreg8(ks, KS_RXQCR, ks->rc_rxqcr); + /* 5. Enqueue Tx(move the pkt from TX buffer into TXQ) */ + ks_wrreg16(ks, KS_TXQCR, TXQCR_METFE); + /* 6. wait until TXQCR_METFE is auto-cleared */ + while (ks_rdreg16(ks, KS_TXQCR) & TXQCR_METFE) + ; +} + +static void ks_disable_int(struct ks_net *ks) +{ + ks_wrreg16(ks, KS_IER, 0x0000); +} /* ks_disable_int */ + +static void ks_enable_int(struct ks_net *ks) +{ + ks_wrreg16(ks, KS_IER, ks->rc_ier); +} /* ks_enable_int */ + +/** + * ks_start_xmit - transmit packet + * @skb : The buffer to transmit + * @netdev : The device used to transmit the packet. + * + * Called by the network layer to transmit the @skb. + * spin_lock_irqsave is required because tx and rx should be mutual exclusive. + * So while tx is in-progress, prevent IRQ interrupt from happenning. + */ +static int ks_start_xmit(struct sk_buff *skb, struct net_device *netdev) +{ + int retv = NETDEV_TX_OK; + struct ks_net *ks = netdev_priv(netdev); + + disable_irq(netdev->irq); + ks_disable_int(ks); + spin_lock(&ks->statelock); + + /* Extra space are required: + * 4 byte for alignment, 4 for status/length, 4 for CRC + */ + + if (likely(ks_tx_fifo_space(ks) >= skb->len + 12)) { + ks_write_qmu(ks, skb->data, skb->len); + dev_kfree_skb(skb); + } else + retv = NETDEV_TX_BUSY; + spin_unlock(&ks->statelock); + ks_enable_int(ks); + enable_irq(netdev->irq); + return retv; +} + +/** + * ks_start_rx - ready to serve pkts + * @ks : The chip information + * + */ +static void ks_start_rx(struct ks_net *ks) +{ + u16 cntl; + + /* Enables QMU Receive (RXCR1). */ + cntl = ks_rdreg16(ks, KS_RXCR1); + cntl |= RXCR1_RXE ; + ks_wrreg16(ks, KS_RXCR1, cntl); +} /* ks_start_rx */ + +/** + * ks_stop_rx - stop to serve pkts + * @ks : The chip information + * + */ +static void ks_stop_rx(struct ks_net *ks) +{ + u16 cntl; + + /* Disables QMU Receive (RXCR1). */ + cntl = ks_rdreg16(ks, KS_RXCR1); + cntl &= ~RXCR1_RXE ; + ks_wrreg16(ks, KS_RXCR1, cntl); + +} /* ks_stop_rx */ + +static unsigned long const ethernet_polynomial = 0x04c11db7U; + +static unsigned long ether_gen_crc(int length, u8 *data) +{ + long crc = -1; + while (--length >= 0) { + u8 current_octet = *data++; + int bit; + + for (bit = 0; bit < 8; bit++, current_octet >>= 1) { + crc = (crc << 1) ^ + ((crc < 0) ^ (current_octet & 1) ? + ethernet_polynomial : 0); + } + } + return (unsigned long)crc; +} /* ether_gen_crc */ + +/** +* ks_set_grpaddr - set multicast information +* @ks : The chip information +*/ + +static void ks_set_grpaddr(struct ks_net *ks) +{ + u8 i; + u32 index, position, value; + + memset(ks->mcast_bits, 0, sizeof(u8) * HW_MCAST_SIZE); + + for (i = 0; i < ks->mcast_lst_size; i++) { + position = (ether_gen_crc(6, ks->mcast_lst[i]) >> 26) & 0x3f; + index = position >> 3; + value = 1 << (position & 7); + ks->mcast_bits[index] |= (u8)value; + } + + for (i = 0; i < HW_MCAST_SIZE; i++) { + if (i & 1) { + ks_wrreg16(ks, (u16)((KS_MAHTR0 + i) & ~1), + (ks->mcast_bits[i] << 8) | + ks->mcast_bits[i - 1]); + } + } +} /* ks_set_grpaddr */ + +/* +* ks_clear_mcast - clear multicast information +* +* @ks : The chip information +* This routine removes all mcast addresses set in the hardware. +*/ + +static void ks_clear_mcast(struct ks_net *ks) +{ + u16 i, mcast_size; + for (i = 0; i < HW_MCAST_SIZE; i++) + ks->mcast_bits[i] = 0; + + mcast_size = HW_MCAST_SIZE >> 2; + for (i = 0; i < mcast_size; i++) + ks_wrreg16(ks, KS_MAHTR0 + (2*i), 0); +} + +static void ks_set_promis(struct ks_net *ks, u16 promiscuous_mode) +{ + u16 cntl; + ks->promiscuous = promiscuous_mode; + ks_stop_rx(ks); /* Stop receiving for reconfiguration */ + cntl = ks_rdreg16(ks, KS_RXCR1); + + cntl &= ~RXCR1_FILTER_MASK; + if (promiscuous_mode) + /* Enable Promiscuous mode */ + cntl |= RXCR1_RXAE | RXCR1_RXINVF; + else + /* Disable Promiscuous mode (default normal mode) */ + cntl |= RXCR1_RXPAFMA; + + ks_wrreg16(ks, KS_RXCR1, cntl); + + if (ks->enabled) + ks_start_rx(ks); + +} /* ks_set_promis */ + +static void ks_set_mcast(struct ks_net *ks, u16 mcast) +{ + u16 cntl; + + ks->all_mcast = mcast; + ks_stop_rx(ks); /* Stop receiving for reconfiguration */ + cntl = ks_rdreg16(ks, KS_RXCR1); + cntl &= ~RXCR1_FILTER_MASK; + if (mcast) + /* Enable "Perfect with Multicast address passed mode" */ + cntl |= (RXCR1_RXAE | RXCR1_RXMAFMA | RXCR1_RXPAFMA); + else + /** + * Disable "Perfect with Multicast address passed + * mode" (normal mode). + */ + cntl |= RXCR1_RXPAFMA; + + ks_wrreg16(ks, KS_RXCR1, cntl); + + if (ks->enabled) + ks_start_rx(ks); +} /* ks_set_mcast */ + +static void ks_set_rx_mode(struct net_device *netdev) +{ + struct ks_net *ks = netdev_priv(netdev); + struct dev_mc_list *ptr; + + /* Turn on/off promiscuous mode. */ + if ((netdev->flags & IFF_PROMISC) == IFF_PROMISC) + ks_set_promis(ks, + (u16)((netdev->flags & IFF_PROMISC) == IFF_PROMISC)); + /* Turn on/off all mcast mode. */ + else if ((netdev->flags & IFF_ALLMULTI) == IFF_ALLMULTI) + ks_set_mcast(ks, + (u16)((netdev->flags & IFF_ALLMULTI) == IFF_ALLMULTI)); + else + ks_set_promis(ks, false); + + if ((netdev->flags & IFF_MULTICAST) && netdev->mc_count) { + if (netdev->mc_count <= MAX_MCAST_LST) { + int i = 0; + for (ptr = netdev->mc_list; ptr; ptr = ptr->next) { + if (!(*ptr->dmi_addr & 1)) + continue; + if (i >= MAX_MCAST_LST) + break; + memcpy(ks->mcast_lst[i++], ptr->dmi_addr, + MAC_ADDR_LEN); + } + ks->mcast_lst_size = (u8)i; + ks_set_grpaddr(ks); + } else { + /** + * List too big to support so + * turn on all mcast mode. + */ + ks->mcast_lst_size = MAX_MCAST_LST; + ks_set_mcast(ks, true); + } + } else { + ks->mcast_lst_size = 0; + ks_clear_mcast(ks); + } +} /* ks_set_rx_mode */ + +static void ks_set_mac(struct ks_net *ks, u8 *data) +{ + u16 *pw = (u16 *)data; + u16 w, u; + + ks_stop_rx(ks); /* Stop receiving for reconfiguration */ + + u = *pw++; + w = ((u & 0xFF) << 8) | ((u >> 8) & 0xFF); + ks_wrreg16(ks, KS_MARH, w); + + u = *pw++; + w = ((u & 0xFF) << 8) | ((u >> 8) & 0xFF); + ks_wrreg16(ks, KS_MARM, w); + + u = *pw; + w = ((u & 0xFF) << 8) | ((u >> 8) & 0xFF); + ks_wrreg16(ks, KS_MARL, w); + + memcpy(ks->mac_addr, data, 6); + + if (ks->enabled) + ks_start_rx(ks); +} + +static int ks_set_mac_address(struct net_device *netdev, void *paddr) +{ + struct ks_net *ks = netdev_priv(netdev); + struct sockaddr *addr = paddr; + u8 *da; + + memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); + + da = (u8 *)netdev->dev_addr; + + ks_set_mac(ks, da); + return 0; +} + +static int ks_net_ioctl(struct net_device *netdev, struct ifreq *req, int cmd) +{ + struct ks_net *ks = netdev_priv(netdev); + + if (!netif_running(netdev)) + return -EINVAL; + + return generic_mii_ioctl(&ks->mii, if_mii(req), cmd, NULL); +} + +static const struct net_device_ops ks_netdev_ops = { + .ndo_open = ks_net_open, + .ndo_stop = ks_net_stop, + .ndo_do_ioctl = ks_net_ioctl, + .ndo_start_xmit = ks_start_xmit, + .ndo_set_mac_address = ks_set_mac_address, + .ndo_set_rx_mode = ks_set_rx_mode, + .ndo_change_mtu = eth_change_mtu, + .ndo_validate_addr = eth_validate_addr, +}; + +/* ethtool support */ + +static void ks_get_drvinfo(struct net_device *netdev, + struct ethtool_drvinfo *di) +{ + strlcpy(di->driver, DRV_NAME, sizeof(di->driver)); + strlcpy(di->version, "1.00", sizeof(di->version)); + strlcpy(di->bus_info, dev_name(netdev->dev.parent), + sizeof(di->bus_info)); +} + +static u32 ks_get_msglevel(struct net_device *netdev) +{ + struct ks_net *ks = netdev_priv(netdev); + return ks->msg_enable; +} + +static void ks_set_msglevel(struct net_device *netdev, u32 to) +{ + struct ks_net *ks = netdev_priv(netdev); + ks->msg_enable = to; +} + +static int ks_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd) +{ + struct ks_net *ks = netdev_priv(netdev); + return mii_ethtool_gset(&ks->mii, cmd); +} + +static int ks_set_settings(struct net_device *netdev, struct ethtool_cmd *cmd) +{ + struct ks_net *ks = netdev_priv(netdev); + return mii_ethtool_sset(&ks->mii, cmd); +} + +static u32 ks_get_link(struct net_device *netdev) +{ + struct ks_net *ks = netdev_priv(netdev); + return mii_link_ok(&ks->mii); +} + +static int ks_nway_reset(struct net_device *netdev) +{ + struct ks_net *ks = netdev_priv(netdev); + return mii_nway_restart(&ks->mii); +} + +static const struct ethtool_ops ks_ethtool_ops = { + .get_drvinfo = ks_get_drvinfo, + .get_msglevel = ks_get_msglevel, + .set_msglevel = ks_set_msglevel, + .get_settings = ks_get_settings, + .set_settings = ks_set_settings, + .get_link = ks_get_link, + .nway_reset = ks_nway_reset, +}; + +/* MII interface controls */ + +/** + * ks_phy_reg - convert MII register into a KS8851 register + * @reg: MII register number. + * + * Return the KS8851 register number for the corresponding MII PHY register + * if possible. Return zero if the MII register has no direct mapping to the + * KS8851 register set. + */ +static int ks_phy_reg(int reg) +{ + switch (reg) { + case MII_BMCR: + return KS_P1MBCR; + case MII_BMSR: + return KS_P1MBSR; + case MII_PHYSID1: + return KS_PHY1ILR; + case MII_PHYSID2: + return KS_PHY1IHR; + case MII_ADVERTISE: + return KS_P1ANAR; + case MII_LPA: + return KS_P1ANLPR; + } + + return 0x0; +} + +/** + * ks_phy_read - MII interface PHY register read. + * @netdev: The network device the PHY is on. + * @phy_addr: Address of PHY (ignored as we only have one) + * @reg: The register to read. + * + * This call reads data from the PHY register specified in @reg. Since the + * device does not support all the MII registers, the non-existant values + * are always returned as zero. + * + * We return zero for unsupported registers as the MII code does not check + * the value returned for any error status, and simply returns it to the + * caller. The mii-tool that the driver was tested with takes any -ve error + * as real PHY capabilities, thus displaying incorrect data to the user. + */ +static int ks_phy_read(struct net_device *netdev, int phy_addr, int reg) +{ + struct ks_net *ks = netdev_priv(netdev); + int ksreg; + int result; + + ksreg = ks_phy_reg(reg); + if (!ksreg) + return 0x0; /* no error return allowed, so use zero */ + + mutex_lock(&ks->lock); + result = ks_rdreg16(ks, ksreg); + mutex_unlock(&ks->lock); + + return result; +} + +static void ks_phy_write(struct net_device *netdev, + int phy, int reg, int value) +{ + struct ks_net *ks = netdev_priv(netdev); + int ksreg; + + ksreg = ks_phy_reg(reg); + if (ksreg) { + mutex_lock(&ks->lock); + ks_wrreg16(ks, ksreg, value); + mutex_unlock(&ks->lock); + } +} + +/** + * ks_read_selftest - read the selftest memory info. + * @ks: The device state + * + * Read and check the TX/RX memory selftest information. + */ +static int ks_read_selftest(struct ks_net *ks) +{ + unsigned both_done = MBIR_TXMBF | MBIR_RXMBF; + int ret = 0; + unsigned rd; + + rd = ks_rdreg16(ks, KS_MBIR); + + if ((rd & both_done) != both_done) { + ks_warn(ks, "Memory selftest not finished\n"); + return 0; + } + + if (rd & MBIR_TXMBFA) { + ks_err(ks, "TX memory selftest fails\n"); + ret |= 1; + } + + if (rd & MBIR_RXMBFA) { + ks_err(ks, "RX memory selftest fails\n"); + ret |= 2; + } + + ks_info(ks, "the selftest passes\n"); + return ret; +} + +static void ks_disable(struct ks_net *ks) +{ + u16 w; + + w = ks_rdreg16(ks, KS_TXCR); + + /* Disables QMU Transmit (TXCR). */ + w &= ~TXCR_TXE; + ks_wrreg16(ks, KS_TXCR, w); + + /* Disables QMU Receive (RXCR1). */ + w = ks_rdreg16(ks, KS_RXCR1); + w &= ~RXCR1_RXE ; + ks_wrreg16(ks, KS_RXCR1, w); + + ks->enabled = false; + +} /* ks_disable */ + +static void ks_setup(struct ks_net *ks) +{ + u16 w; + + /** + * Configure QMU Transmit + */ + + /* Setup Transmit Frame Data Pointer Auto-Increment (TXFDPR) */ + ks_wrreg16(ks, KS_TXFDPR, TXFDPR_TXFPAI); + + /* Setup Receive Frame Data Pointer Auto-Increment */ + ks_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI); + + /* Setup Receive Frame Threshold - 1 frame (RXFCTFC) */ + ks_wrreg16(ks, KS_RXFCTR, 1 & RXFCTR_THRESHOLD_MASK); + + /* Setup RxQ Command Control (RXQCR) */ + ks->rc_rxqcr = RXQCR_CMD_CNTL; + ks_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); + + /** + * set the force mode to half duplex, default is full duplex + * because if the auto-negotiation fails, most switch uses + * half-duplex. + */ + + w = ks_rdreg16(ks, KS_P1MBCR); + w &= ~P1MBCR_FORCE_FDX; + ks_wrreg16(ks, KS_P1MBCR, w); + + w = TXCR_TXFCE | TXCR_TXPE | TXCR_TXCRC | TXCR_TCGIP; + ks_wrreg16(ks, KS_TXCR, w); + + w = RXCR1_RXFCE | RXCR1_RXBE | RXCR1_RXUE; + + if (ks->promiscuous) /* bPromiscuous */ + w |= (RXCR1_RXAE | RXCR1_RXINVF); + else if (ks->all_mcast) /* Multicast address passed mode */ + w |= (RXCR1_RXAE | RXCR1_RXMAFMA | RXCR1_RXPAFMA); + else /* Normal mode */ + w |= RXCR1_RXPAFMA; + + ks_wrreg16(ks, KS_RXCR1, w); +} /*ks_setup */ + + +static void ks_setup_int(struct ks_net *ks) +{ + ks->rc_ier = 0x00; + /* Clear the interrupts status of the hardware. */ + ks_wrreg16(ks, KS_ISR, 0xffff); + + /* Enables the interrupts of the hardware. */ + ks->rc_ier = (IRQ_LCI | IRQ_TXI | IRQ_RXI); +} /* ks_setup_int */ + +void ks_enable(struct ks_net *ks) +{ + u16 w; + + w = ks_rdreg16(ks, KS_TXCR); + /* Enables QMU Transmit (TXCR). */ + ks_wrreg16(ks, KS_TXCR, w | TXCR_TXE); + + /* + * RX Frame Count Threshold Enable and Auto-Dequeue RXQ Frame + * Enable + */ + + w = ks_rdreg16(ks, KS_RXQCR); + ks_wrreg16(ks, KS_RXQCR, w | RXQCR_RXFCTE); + + /* Enables QMU Receive (RXCR1). */ + w = ks_rdreg16(ks, KS_RXCR1); + ks_wrreg16(ks, KS_RXCR1, w | RXCR1_RXE); + ks->enabled = true; +} /* ks_enable */ + +static int ks_hw_init(struct ks_net *ks) +{ +#define MHEADER_SIZE (sizeof(struct type_frame_head) * MAX_RECV_FRAMES) + ks->promiscuous = 0; + ks->all_mcast = 0; + ks->mcast_lst_size = 0; + + ks->frame_head_info = (struct type_frame_head *) \ + kmalloc(MHEADER_SIZE, GFP_KERNEL); + if (!ks->frame_head_info) { + printk(KERN_ERR "Error: Fail to allocate frame memory\n"); + return false; + } + + ks_set_mac(ks, KS_DEFAULT_MAC_ADDRESS); + return true; +} + + +static int __devinit ks8851_probe(struct platform_device *pdev) +{ + int err = -ENOMEM; + struct resource *io_d, *io_c; + struct net_device *netdev; + struct ks_net *ks; + u16 id, data; + + io_d = platform_get_resource(pdev, IORESOURCE_MEM, 0); + io_c = platform_get_resource(pdev, IORESOURCE_MEM, 1); + + if (!request_mem_region(io_d->start, resource_size(io_d), DRV_NAME)) + goto err_mem_region; + + if (!request_mem_region(io_c->start, resource_size(io_c), DRV_NAME)) + goto err_mem_region1; + + netdev = alloc_etherdev(sizeof(struct ks_net)); + if (!netdev) + goto err_alloc_etherdev; + + SET_NETDEV_DEV(netdev, &pdev->dev); + + ks = netdev_priv(netdev); + ks->netdev = netdev; + ks->hw_addr = ioremap(io_d->start, resource_size(io_d)); + + if (!ks->hw_addr) + goto err_ioremap; + + ks->hw_addr_cmd = ioremap(io_c->start, resource_size(io_c)); + if (!ks->hw_addr_cmd) + goto err_ioremap1; + + ks->irq = platform_get_irq(pdev, 0); + + if (ks->irq < 0) { + err = ks->irq; + goto err_get_irq; + } + + ks->pdev = pdev; + + mutex_init(&ks->lock); + spin_lock_init(&ks->statelock); + + netdev->netdev_ops = &ks_netdev_ops; + netdev->ethtool_ops = &ks_ethtool_ops; + + /* setup mii state */ + ks->mii.dev = netdev; + ks->mii.phy_id = 1, + ks->mii.phy_id_mask = 1; + ks->mii.reg_num_mask = 0xf; + ks->mii.mdio_read = ks_phy_read; + ks->mii.mdio_write = ks_phy_write; + + ks_info(ks, "message enable is %d\n", msg_enable); + /* set the default message enable */ + ks->msg_enable = netif_msg_init(msg_enable, (NETIF_MSG_DRV | + NETIF_MSG_PROBE | + NETIF_MSG_LINK)); + ks_read_config(ks); + + /* simple check for a valid chip being connected to the bus */ + if ((ks_rdreg16(ks, KS_CIDER) & ~CIDER_REV_MASK) != CIDER_ID) { + ks_err(ks, "failed to read device ID\n"); + err = -ENODEV; + goto err_register; + } + + if (ks_read_selftest(ks)) { + ks_err(ks, "failed to read device ID\n"); + err = -ENODEV; + goto err_register; + } + + err = register_netdev(netdev); + if (err) + goto err_register; + + platform_set_drvdata(pdev, netdev); + + ks_soft_reset(ks, GRR_GSR); + ks_hw_init(ks); + ks_disable(ks); + ks_setup(ks); + ks_setup_int(ks); + ks_enable_int(ks); + ks_enable(ks); + memcpy(netdev->dev_addr, ks->mac_addr, 6); + + data = ks_rdreg16(ks, KS_OBCR); + ks_wrreg16(ks, KS_OBCR, data | OBCR_ODS_16MA); + + /** + * If you want to use the default MAC addr, + * comment out the 2 functions below. + */ + + random_ether_addr(netdev->dev_addr); + ks_set_mac(ks, netdev->dev_addr); + + id = ks_rdreg16(ks, KS_CIDER); + + printk(KERN_INFO DRV_NAME + " Found chip, family: 0x%x, id: 0x%x, rev: 0x%x\n", + (id >> 8) & 0xff, (id >> 4) & 0xf, (id >> 1) & 0x7); + return 0; + +err_register: +err_get_irq: + iounmap(ks->hw_addr_cmd); +err_ioremap1: + iounmap(ks->hw_addr); +err_ioremap: + free_netdev(netdev); +err_alloc_etherdev: + release_mem_region(io_c->start, resource_size(io_c)); +err_mem_region1: + release_mem_region(io_d->start, resource_size(io_d)); +err_mem_region: + return err; +} + +static int __devexit ks8851_remove(struct platform_device *pdev) +{ + struct net_device *netdev = platform_get_drvdata(pdev); + struct ks_net *ks = netdev_priv(netdev); + struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + unregister_netdev(netdev); + iounmap(ks->hw_addr); + free_netdev(netdev); + release_mem_region(iomem->start, resource_size(iomem)); + platform_set_drvdata(pdev, NULL); + return 0; + +} + +static struct platform_driver ks8851_platform_driver = { + .driver = { + .name = DRV_NAME, + .owner = THIS_MODULE, + }, + .probe = ks8851_probe, + .remove = __devexit_p(ks8851_remove), +}; + +static int __init ks8851_init(void) +{ + return platform_driver_register(&ks8851_platform_driver); +} + +static void __exit ks8851_exit(void) +{ + platform_driver_unregister(&ks8851_platform_driver); +} + +module_init(ks8851_init); +module_exit(ks8851_exit); + +MODULE_DESCRIPTION("KS8851 MLL Network driver"); +MODULE_AUTHOR("David Choi <david.choi@micrel.com>"); +MODULE_LICENSE("GPL"); +module_param_named(message, msg_enable, int, 0); +MODULE_PARM_DESC(message, "Message verbosity level (0=none, 31=all)"); + |