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authorGreg Kroah-Hartman <gregkh@suse.de>2011-01-13 12:10:18 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2011-01-13 12:10:18 -0800
commitab4382d27412e7e3e7c936e8d50d8888dfac3df8 (patch)
tree51d96dea2431140358784b6b426715f37f74fd53 /drivers/serial/sunsab.c
parent728674a7e466628df2aeec6d11a2ae1ef968fb67 (diff)
tty: move drivers/serial/ to drivers/tty/serial/
The serial drivers are really just tty drivers, so move them to drivers/tty/ to make things a bit neater overall. This is part of the tty/serial driver movement proceedure as proposed by Arnd Bergmann and approved by everyone involved a number of months ago. Cc: Arnd Bergmann <arnd@arndb.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Rogier Wolff <R.E.Wolff@bitwizard.nl> Cc: Michael H. Warfield <mhw@wittsend.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/serial/sunsab.c')
-rw-r--r--drivers/serial/sunsab.c1152
1 files changed, 0 insertions, 1152 deletions
diff --git a/drivers/serial/sunsab.c b/drivers/serial/sunsab.c
deleted file mode 100644
index 5b246b18f42f..000000000000
--- a/drivers/serial/sunsab.c
+++ /dev/null
@@ -1,1152 +0,0 @@
-/* sunsab.c: ASYNC Driver for the SIEMENS SAB82532 DUSCC.
- *
- * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
- * Copyright (C) 2002, 2006 David S. Miller (davem@davemloft.net)
- *
- * Rewrote buffer handling to use CIRC(Circular Buffer) macros.
- * Maxim Krasnyanskiy <maxk@qualcomm.com>
- *
- * Fixed to use tty_get_baud_rate, and to allow for arbitrary baud
- * rates to be programmed into the UART. Also eliminated a lot of
- * duplicated code in the console setup.
- * Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12
- *
- * Ported to new 2.5.x UART layer.
- * David S. Miller <davem@davemloft.net>
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/ptrace.h>
-#include <linux/ioport.h>
-#include <linux/circ_buf.h>
-#include <linux/serial.h>
-#include <linux/sysrq.h>
-#include <linux/console.h>
-#include <linux/spinlock.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/init.h>
-#include <linux/of_device.h>
-
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/prom.h>
-
-#if defined(CONFIG_SERIAL_SUNSAB_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-#define SUPPORT_SYSRQ
-#endif
-
-#include <linux/serial_core.h>
-
-#include "suncore.h"
-#include "sunsab.h"
-
-struct uart_sunsab_port {
- struct uart_port port; /* Generic UART port */
- union sab82532_async_regs __iomem *regs; /* Chip registers */
- unsigned long irqflags; /* IRQ state flags */
- int dsr; /* Current DSR state */
- unsigned int cec_timeout; /* Chip poll timeout... */
- unsigned int tec_timeout; /* likewise */
- unsigned char interrupt_mask0;/* ISR0 masking */
- unsigned char interrupt_mask1;/* ISR1 masking */
- unsigned char pvr_dtr_bit; /* Which PVR bit is DTR */
- unsigned char pvr_dsr_bit; /* Which PVR bit is DSR */
- unsigned int gis_shift;
- int type; /* SAB82532 version */
-
- /* Setting configuration bits while the transmitter is active
- * can cause garbage characters to get emitted by the chip.
- * Therefore, we cache such writes here and do the real register
- * write the next time the transmitter becomes idle.
- */
- unsigned int cached_ebrg;
- unsigned char cached_mode;
- unsigned char cached_pvr;
- unsigned char cached_dafo;
-};
-
-/*
- * This assumes you have a 29.4912 MHz clock for your UART.
- */
-#define SAB_BASE_BAUD ( 29491200 / 16 )
-
-static char *sab82532_version[16] = {
- "V1.0", "V2.0", "V3.2", "V(0x03)",
- "V(0x04)", "V(0x05)", "V(0x06)", "V(0x07)",
- "V(0x08)", "V(0x09)", "V(0x0a)", "V(0x0b)",
- "V(0x0c)", "V(0x0d)", "V(0x0e)", "V(0x0f)"
-};
-
-#define SAB82532_MAX_TEC_TIMEOUT 200000 /* 1 character time (at 50 baud) */
-#define SAB82532_MAX_CEC_TIMEOUT 50000 /* 2.5 TX CLKs (at 50 baud) */
-
-#define SAB82532_RECV_FIFO_SIZE 32 /* Standard async fifo sizes */
-#define SAB82532_XMIT_FIFO_SIZE 32
-
-static __inline__ void sunsab_tec_wait(struct uart_sunsab_port *up)
-{
- int timeout = up->tec_timeout;
-
- while ((readb(&up->regs->r.star) & SAB82532_STAR_TEC) && --timeout)
- udelay(1);
-}
-
-static __inline__ void sunsab_cec_wait(struct uart_sunsab_port *up)
-{
- int timeout = up->cec_timeout;
-
- while ((readb(&up->regs->r.star) & SAB82532_STAR_CEC) && --timeout)
- udelay(1);
-}
-
-static struct tty_struct *
-receive_chars(struct uart_sunsab_port *up,
- union sab82532_irq_status *stat)
-{
- struct tty_struct *tty = NULL;
- unsigned char buf[32];
- int saw_console_brk = 0;
- int free_fifo = 0;
- int count = 0;
- int i;
-
- if (up->port.state != NULL) /* Unopened serial console */
- tty = up->port.state->port.tty;
-
- /* Read number of BYTES (Character + Status) available. */
- if (stat->sreg.isr0 & SAB82532_ISR0_RPF) {
- count = SAB82532_RECV_FIFO_SIZE;
- free_fifo++;
- }
-
- if (stat->sreg.isr0 & SAB82532_ISR0_TCD) {
- count = readb(&up->regs->r.rbcl) & (SAB82532_RECV_FIFO_SIZE - 1);
- free_fifo++;
- }
-
- /* Issue a FIFO read command in case we where idle. */
- if (stat->sreg.isr0 & SAB82532_ISR0_TIME) {
- sunsab_cec_wait(up);
- writeb(SAB82532_CMDR_RFRD, &up->regs->w.cmdr);
- return tty;
- }
-
- if (stat->sreg.isr0 & SAB82532_ISR0_RFO)
- free_fifo++;
-
- /* Read the FIFO. */
- for (i = 0; i < count; i++)
- buf[i] = readb(&up->regs->r.rfifo[i]);
-
- /* Issue Receive Message Complete command. */
- if (free_fifo) {
- sunsab_cec_wait(up);
- writeb(SAB82532_CMDR_RMC, &up->regs->w.cmdr);
- }
-
- /* Count may be zero for BRK, so we check for it here */
- if ((stat->sreg.isr1 & SAB82532_ISR1_BRK) &&
- (up->port.line == up->port.cons->index))
- saw_console_brk = 1;
-
- for (i = 0; i < count; i++) {
- unsigned char ch = buf[i], flag;
-
- if (tty == NULL) {
- uart_handle_sysrq_char(&up->port, ch);
- continue;
- }
-
- flag = TTY_NORMAL;
- up->port.icount.rx++;
-
- if (unlikely(stat->sreg.isr0 & (SAB82532_ISR0_PERR |
- SAB82532_ISR0_FERR |
- SAB82532_ISR0_RFO)) ||
- unlikely(stat->sreg.isr1 & SAB82532_ISR1_BRK)) {
- /*
- * For statistics only
- */
- if (stat->sreg.isr1 & SAB82532_ISR1_BRK) {
- stat->sreg.isr0 &= ~(SAB82532_ISR0_PERR |
- SAB82532_ISR0_FERR);
- up->port.icount.brk++;
- /*
- * We do the SysRQ and SAK checking
- * here because otherwise the break
- * may get masked by ignore_status_mask
- * or read_status_mask.
- */
- if (uart_handle_break(&up->port))
- continue;
- } else if (stat->sreg.isr0 & SAB82532_ISR0_PERR)
- up->port.icount.parity++;
- else if (stat->sreg.isr0 & SAB82532_ISR0_FERR)
- up->port.icount.frame++;
- if (stat->sreg.isr0 & SAB82532_ISR0_RFO)
- up->port.icount.overrun++;
-
- /*
- * Mask off conditions which should be ingored.
- */
- stat->sreg.isr0 &= (up->port.read_status_mask & 0xff);
- stat->sreg.isr1 &= ((up->port.read_status_mask >> 8) & 0xff);
-
- if (stat->sreg.isr1 & SAB82532_ISR1_BRK) {
- flag = TTY_BREAK;
- } else if (stat->sreg.isr0 & SAB82532_ISR0_PERR)
- flag = TTY_PARITY;
- else if (stat->sreg.isr0 & SAB82532_ISR0_FERR)
- flag = TTY_FRAME;
- }
-
- if (uart_handle_sysrq_char(&up->port, ch))
- continue;
-
- if ((stat->sreg.isr0 & (up->port.ignore_status_mask & 0xff)) == 0 &&
- (stat->sreg.isr1 & ((up->port.ignore_status_mask >> 8) & 0xff)) == 0)
- tty_insert_flip_char(tty, ch, flag);
- if (stat->sreg.isr0 & SAB82532_ISR0_RFO)
- tty_insert_flip_char(tty, 0, TTY_OVERRUN);
- }
-
- if (saw_console_brk)
- sun_do_break();
-
- return tty;
-}
-
-static void sunsab_stop_tx(struct uart_port *);
-static void sunsab_tx_idle(struct uart_sunsab_port *);
-
-static void transmit_chars(struct uart_sunsab_port *up,
- union sab82532_irq_status *stat)
-{
- struct circ_buf *xmit = &up->port.state->xmit;
- int i;
-
- if (stat->sreg.isr1 & SAB82532_ISR1_ALLS) {
- up->interrupt_mask1 |= SAB82532_IMR1_ALLS;
- writeb(up->interrupt_mask1, &up->regs->w.imr1);
- set_bit(SAB82532_ALLS, &up->irqflags);
- }
-
-#if 0 /* bde@nwlink.com says this check causes problems */
- if (!(stat->sreg.isr1 & SAB82532_ISR1_XPR))
- return;
-#endif
-
- if (!(readb(&up->regs->r.star) & SAB82532_STAR_XFW))
- return;
-
- set_bit(SAB82532_XPR, &up->irqflags);
- sunsab_tx_idle(up);
-
- if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
- up->interrupt_mask1 |= SAB82532_IMR1_XPR;
- writeb(up->interrupt_mask1, &up->regs->w.imr1);
- return;
- }
-
- up->interrupt_mask1 &= ~(SAB82532_IMR1_ALLS|SAB82532_IMR1_XPR);
- writeb(up->interrupt_mask1, &up->regs->w.imr1);
- clear_bit(SAB82532_ALLS, &up->irqflags);
-
- /* Stuff 32 bytes into Transmit FIFO. */
- clear_bit(SAB82532_XPR, &up->irqflags);
- for (i = 0; i < up->port.fifosize; i++) {
- writeb(xmit->buf[xmit->tail],
- &up->regs->w.xfifo[i]);
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
- up->port.icount.tx++;
- if (uart_circ_empty(xmit))
- break;
- }
-
- /* Issue a Transmit Frame command. */
- sunsab_cec_wait(up);
- writeb(SAB82532_CMDR_XF, &up->regs->w.cmdr);
-
- if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
- uart_write_wakeup(&up->port);
-
- if (uart_circ_empty(xmit))
- sunsab_stop_tx(&up->port);
-}
-
-static void check_status(struct uart_sunsab_port *up,
- union sab82532_irq_status *stat)
-{
- if (stat->sreg.isr0 & SAB82532_ISR0_CDSC)
- uart_handle_dcd_change(&up->port,
- !(readb(&up->regs->r.vstr) & SAB82532_VSTR_CD));
-
- if (stat->sreg.isr1 & SAB82532_ISR1_CSC)
- uart_handle_cts_change(&up->port,
- (readb(&up->regs->r.star) & SAB82532_STAR_CTS));
-
- if ((readb(&up->regs->r.pvr) & up->pvr_dsr_bit) ^ up->dsr) {
- up->dsr = (readb(&up->regs->r.pvr) & up->pvr_dsr_bit) ? 0 : 1;
- up->port.icount.dsr++;
- }
-
- wake_up_interruptible(&up->port.state->port.delta_msr_wait);
-}
-
-static irqreturn_t sunsab_interrupt(int irq, void *dev_id)
-{
- struct uart_sunsab_port *up = dev_id;
- struct tty_struct *tty;
- union sab82532_irq_status status;
- unsigned long flags;
- unsigned char gis;
-
- spin_lock_irqsave(&up->port.lock, flags);
-
- status.stat = 0;
- gis = readb(&up->regs->r.gis) >> up->gis_shift;
- if (gis & 1)
- status.sreg.isr0 = readb(&up->regs->r.isr0);
- if (gis & 2)
- status.sreg.isr1 = readb(&up->regs->r.isr1);
-
- tty = NULL;
- if (status.stat) {
- if ((status.sreg.isr0 & (SAB82532_ISR0_TCD | SAB82532_ISR0_TIME |
- SAB82532_ISR0_RFO | SAB82532_ISR0_RPF)) ||
- (status.sreg.isr1 & SAB82532_ISR1_BRK))
- tty = receive_chars(up, &status);
- if ((status.sreg.isr0 & SAB82532_ISR0_CDSC) ||
- (status.sreg.isr1 & SAB82532_ISR1_CSC))
- check_status(up, &status);
- if (status.sreg.isr1 & (SAB82532_ISR1_ALLS | SAB82532_ISR1_XPR))
- transmit_chars(up, &status);
- }
-
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- if (tty)
- tty_flip_buffer_push(tty);
-
- return IRQ_HANDLED;
-}
-
-/* port->lock is not held. */
-static unsigned int sunsab_tx_empty(struct uart_port *port)
-{
- struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
- int ret;
-
- /* Do not need a lock for a state test like this. */
- if (test_bit(SAB82532_ALLS, &up->irqflags))
- ret = TIOCSER_TEMT;
- else
- ret = 0;
-
- return ret;
-}
-
-/* port->lock held by caller. */
-static void sunsab_set_mctrl(struct uart_port *port, unsigned int mctrl)
-{
- struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
-
- if (mctrl & TIOCM_RTS) {
- up->cached_mode &= ~SAB82532_MODE_FRTS;
- up->cached_mode |= SAB82532_MODE_RTS;
- } else {
- up->cached_mode |= (SAB82532_MODE_FRTS |
- SAB82532_MODE_RTS);
- }
- if (mctrl & TIOCM_DTR) {
- up->cached_pvr &= ~(up->pvr_dtr_bit);
- } else {
- up->cached_pvr |= up->pvr_dtr_bit;
- }
-
- set_bit(SAB82532_REGS_PENDING, &up->irqflags);
- if (test_bit(SAB82532_XPR, &up->irqflags))
- sunsab_tx_idle(up);
-}
-
-/* port->lock is held by caller and interrupts are disabled. */
-static unsigned int sunsab_get_mctrl(struct uart_port *port)
-{
- struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
- unsigned char val;
- unsigned int result;
-
- result = 0;
-
- val = readb(&up->regs->r.pvr);
- result |= (val & up->pvr_dsr_bit) ? 0 : TIOCM_DSR;
-
- val = readb(&up->regs->r.vstr);
- result |= (val & SAB82532_VSTR_CD) ? 0 : TIOCM_CAR;
-
- val = readb(&up->regs->r.star);
- result |= (val & SAB82532_STAR_CTS) ? TIOCM_CTS : 0;
-
- return result;
-}
-
-/* port->lock held by caller. */
-static void sunsab_stop_tx(struct uart_port *port)
-{
- struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
-
- up->interrupt_mask1 |= SAB82532_IMR1_XPR;
- writeb(up->interrupt_mask1, &up->regs->w.imr1);
-}
-
-/* port->lock held by caller. */
-static void sunsab_tx_idle(struct uart_sunsab_port *up)
-{
- if (test_bit(SAB82532_REGS_PENDING, &up->irqflags)) {
- u8 tmp;
-
- clear_bit(SAB82532_REGS_PENDING, &up->irqflags);
- writeb(up->cached_mode, &up->regs->rw.mode);
- writeb(up->cached_pvr, &up->regs->rw.pvr);
- writeb(up->cached_dafo, &up->regs->w.dafo);
-
- writeb(up->cached_ebrg & 0xff, &up->regs->w.bgr);
- tmp = readb(&up->regs->rw.ccr2);
- tmp &= ~0xc0;
- tmp |= (up->cached_ebrg >> 2) & 0xc0;
- writeb(tmp, &up->regs->rw.ccr2);
- }
-}
-
-/* port->lock held by caller. */
-static void sunsab_start_tx(struct uart_port *port)
-{
- struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
- struct circ_buf *xmit = &up->port.state->xmit;
- int i;
-
- up->interrupt_mask1 &= ~(SAB82532_IMR1_ALLS|SAB82532_IMR1_XPR);
- writeb(up->interrupt_mask1, &up->regs->w.imr1);
-
- if (!test_bit(SAB82532_XPR, &up->irqflags))
- return;
-
- clear_bit(SAB82532_ALLS, &up->irqflags);
- clear_bit(SAB82532_XPR, &up->irqflags);
-
- for (i = 0; i < up->port.fifosize; i++) {
- writeb(xmit->buf[xmit->tail],
- &up->regs->w.xfifo[i]);
- xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
- up->port.icount.tx++;
- if (uart_circ_empty(xmit))
- break;
- }
-
- /* Issue a Transmit Frame command. */
- sunsab_cec_wait(up);
- writeb(SAB82532_CMDR_XF, &up->regs->w.cmdr);
-}
-
-/* port->lock is not held. */
-static void sunsab_send_xchar(struct uart_port *port, char ch)
-{
- struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
- unsigned long flags;
-
- spin_lock_irqsave(&up->port.lock, flags);
-
- sunsab_tec_wait(up);
- writeb(ch, &up->regs->w.tic);
-
- spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-/* port->lock held by caller. */
-static void sunsab_stop_rx(struct uart_port *port)
-{
- struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
-
- up->interrupt_mask0 |= SAB82532_IMR0_TCD;
- writeb(up->interrupt_mask1, &up->regs->w.imr0);
-}
-
-/* port->lock held by caller. */
-static void sunsab_enable_ms(struct uart_port *port)
-{
- /* For now we always receive these interrupts. */
-}
-
-/* port->lock is not held. */
-static void sunsab_break_ctl(struct uart_port *port, int break_state)
-{
- struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
- unsigned long flags;
- unsigned char val;
-
- spin_lock_irqsave(&up->port.lock, flags);
-
- val = up->cached_dafo;
- if (break_state)
- val |= SAB82532_DAFO_XBRK;
- else
- val &= ~SAB82532_DAFO_XBRK;
- up->cached_dafo = val;
-
- set_bit(SAB82532_REGS_PENDING, &up->irqflags);
- if (test_bit(SAB82532_XPR, &up->irqflags))
- sunsab_tx_idle(up);
-
- spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-/* port->lock is not held. */
-static int sunsab_startup(struct uart_port *port)
-{
- struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
- unsigned long flags;
- unsigned char tmp;
- int err = request_irq(up->port.irq, sunsab_interrupt,
- IRQF_SHARED, "sab", up);
- if (err)
- return err;
-
- spin_lock_irqsave(&up->port.lock, flags);
-
- /*
- * Wait for any commands or immediate characters
- */
- sunsab_cec_wait(up);
- sunsab_tec_wait(up);
-
- /*
- * Clear the FIFO buffers.
- */
- writeb(SAB82532_CMDR_RRES, &up->regs->w.cmdr);
- sunsab_cec_wait(up);
- writeb(SAB82532_CMDR_XRES, &up->regs->w.cmdr);
-
- /*
- * Clear the interrupt registers.
- */
- (void) readb(&up->regs->r.isr0);
- (void) readb(&up->regs->r.isr1);
-
- /*
- * Now, initialize the UART
- */
- writeb(0, &up->regs->w.ccr0); /* power-down */
- writeb(SAB82532_CCR0_MCE | SAB82532_CCR0_SC_NRZ |
- SAB82532_CCR0_SM_ASYNC, &up->regs->w.ccr0);
- writeb(SAB82532_CCR1_ODS | SAB82532_CCR1_BCR | 7, &up->regs->w.ccr1);
- writeb(SAB82532_CCR2_BDF | SAB82532_CCR2_SSEL |
- SAB82532_CCR2_TOE, &up->regs->w.ccr2);
- writeb(0, &up->regs->w.ccr3);
- writeb(SAB82532_CCR4_MCK4 | SAB82532_CCR4_EBRG, &up->regs->w.ccr4);
- up->cached_mode = (SAB82532_MODE_RTS | SAB82532_MODE_FCTS |
- SAB82532_MODE_RAC);
- writeb(up->cached_mode, &up->regs->w.mode);
- writeb(SAB82532_RFC_DPS|SAB82532_RFC_RFTH_32, &up->regs->w.rfc);
-
- tmp = readb(&up->regs->rw.ccr0);
- tmp |= SAB82532_CCR0_PU; /* power-up */
- writeb(tmp, &up->regs->rw.ccr0);
-
- /*
- * Finally, enable interrupts
- */
- up->interrupt_mask0 = (SAB82532_IMR0_PERR | SAB82532_IMR0_FERR |
- SAB82532_IMR0_PLLA);
- writeb(up->interrupt_mask0, &up->regs->w.imr0);
- up->interrupt_mask1 = (SAB82532_IMR1_BRKT | SAB82532_IMR1_ALLS |
- SAB82532_IMR1_XOFF | SAB82532_IMR1_TIN |
- SAB82532_IMR1_CSC | SAB82532_IMR1_XON |
- SAB82532_IMR1_XPR);
- writeb(up->interrupt_mask1, &up->regs->w.imr1);
- set_bit(SAB82532_ALLS, &up->irqflags);
- set_bit(SAB82532_XPR, &up->irqflags);
-
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- return 0;
-}
-
-/* port->lock is not held. */
-static void sunsab_shutdown(struct uart_port *port)
-{
- struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
- unsigned long flags;
-
- spin_lock_irqsave(&up->port.lock, flags);
-
- /* Disable Interrupts */
- up->interrupt_mask0 = 0xff;
- writeb(up->interrupt_mask0, &up->regs->w.imr0);
- up->interrupt_mask1 = 0xff;
- writeb(up->interrupt_mask1, &up->regs->w.imr1);
-
- /* Disable break condition */
- up->cached_dafo = readb(&up->regs->rw.dafo);
- up->cached_dafo &= ~SAB82532_DAFO_XBRK;
- writeb(up->cached_dafo, &up->regs->rw.dafo);
-
- /* Disable Receiver */
- up->cached_mode &= ~SAB82532_MODE_RAC;
- writeb(up->cached_mode, &up->regs->rw.mode);
-
- /*
- * XXX FIXME
- *
- * If the chip is powered down here the system hangs/crashes during
- * reboot or shutdown. This needs to be investigated further,
- * similar behaviour occurs in 2.4 when the driver is configured
- * as a module only. One hint may be that data is sometimes
- * transmitted at 9600 baud during shutdown (regardless of the
- * speed the chip was configured for when the port was open).
- */
-#if 0
- /* Power Down */
- tmp = readb(&up->regs->rw.ccr0);
- tmp &= ~SAB82532_CCR0_PU;
- writeb(tmp, &up->regs->rw.ccr0);
-#endif
-
- spin_unlock_irqrestore(&up->port.lock, flags);
- free_irq(up->port.irq, up);
-}
-
-/*
- * This is used to figure out the divisor speeds.
- *
- * The formula is: Baud = SAB_BASE_BAUD / ((N + 1) * (1 << M)),
- *
- * with 0 <= N < 64 and 0 <= M < 16
- */
-
-static void calc_ebrg(int baud, int *n_ret, int *m_ret)
-{
- int n, m;
-
- if (baud == 0) {
- *n_ret = 0;
- *m_ret = 0;
- return;
- }
-
- /*
- * We scale numbers by 10 so that we get better accuracy
- * without having to use floating point. Here we increment m
- * until n is within the valid range.
- */
- n = (SAB_BASE_BAUD * 10) / baud;
- m = 0;
- while (n >= 640) {
- n = n / 2;
- m++;
- }
- n = (n+5) / 10;
- /*
- * We try very hard to avoid speeds with M == 0 since they may
- * not work correctly for XTAL frequences above 10 MHz.
- */
- if ((m == 0) && ((n & 1) == 0)) {
- n = n / 2;
- m++;
- }
- *n_ret = n - 1;
- *m_ret = m;
-}
-
-/* Internal routine, port->lock is held and local interrupts are disabled. */
-static void sunsab_convert_to_sab(struct uart_sunsab_port *up, unsigned int cflag,
- unsigned int iflag, unsigned int baud,
- unsigned int quot)
-{
- unsigned char dafo;
- int bits, n, m;
-
- /* Byte size and parity */
- switch (cflag & CSIZE) {
- case CS5: dafo = SAB82532_DAFO_CHL5; bits = 7; break;
- case CS6: dafo = SAB82532_DAFO_CHL6; bits = 8; break;
- case CS7: dafo = SAB82532_DAFO_CHL7; bits = 9; break;
- case CS8: dafo = SAB82532_DAFO_CHL8; bits = 10; break;
- /* Never happens, but GCC is too dumb to figure it out */
- default: dafo = SAB82532_DAFO_CHL5; bits = 7; break;
- }
-
- if (cflag & CSTOPB) {
- dafo |= SAB82532_DAFO_STOP;
- bits++;
- }
-
- if (cflag & PARENB) {
- dafo |= SAB82532_DAFO_PARE;
- bits++;
- }
-
- if (cflag & PARODD) {
- dafo |= SAB82532_DAFO_PAR_ODD;
- } else {
- dafo |= SAB82532_DAFO_PAR_EVEN;
- }
- up->cached_dafo = dafo;
-
- calc_ebrg(baud, &n, &m);
-
- up->cached_ebrg = n | (m << 6);
-
- up->tec_timeout = (10 * 1000000) / baud;
- up->cec_timeout = up->tec_timeout >> 2;
-
- /* CTS flow control flags */
- /* We encode read_status_mask and ignore_status_mask like so:
- *
- * ---------------------
- * | ... | ISR1 | ISR0 |
- * ---------------------
- * .. 15 8 7 0
- */
-
- up->port.read_status_mask = (SAB82532_ISR0_TCD | SAB82532_ISR0_TIME |
- SAB82532_ISR0_RFO | SAB82532_ISR0_RPF |
- SAB82532_ISR0_CDSC);
- up->port.read_status_mask |= (SAB82532_ISR1_CSC |
- SAB82532_ISR1_ALLS |
- SAB82532_ISR1_XPR) << 8;
- if (iflag & INPCK)
- up->port.read_status_mask |= (SAB82532_ISR0_PERR |
- SAB82532_ISR0_FERR);
- if (iflag & (BRKINT | PARMRK))
- up->port.read_status_mask |= (SAB82532_ISR1_BRK << 8);
-
- /*
- * Characteres to ignore
- */
- up->port.ignore_status_mask = 0;
- if (iflag & IGNPAR)
- up->port.ignore_status_mask |= (SAB82532_ISR0_PERR |
- SAB82532_ISR0_FERR);
- if (iflag & IGNBRK) {
- up->port.ignore_status_mask |= (SAB82532_ISR1_BRK << 8);
- /*
- * If we're ignoring parity and break indicators,
- * ignore overruns too (for real raw support).
- */
- if (iflag & IGNPAR)
- up->port.ignore_status_mask |= SAB82532_ISR0_RFO;
- }
-
- /*
- * ignore all characters if CREAD is not set
- */
- if ((cflag & CREAD) == 0)
- up->port.ignore_status_mask |= (SAB82532_ISR0_RPF |
- SAB82532_ISR0_TCD);
-
- uart_update_timeout(&up->port, cflag,
- (up->port.uartclk / (16 * quot)));
-
- /* Now schedule a register update when the chip's
- * transmitter is idle.
- */
- up->cached_mode |= SAB82532_MODE_RAC;
- set_bit(SAB82532_REGS_PENDING, &up->irqflags);
- if (test_bit(SAB82532_XPR, &up->irqflags))
- sunsab_tx_idle(up);
-}
-
-/* port->lock is not held. */
-static void sunsab_set_termios(struct uart_port *port, struct ktermios *termios,
- struct ktermios *old)
-{
- struct uart_sunsab_port *up = (struct uart_sunsab_port *) port;
- unsigned long flags;
- unsigned int baud = uart_get_baud_rate(port, termios, old, 0, 4000000);
- unsigned int quot = uart_get_divisor(port, baud);
-
- spin_lock_irqsave(&up->port.lock, flags);
- sunsab_convert_to_sab(up, termios->c_cflag, termios->c_iflag, baud, quot);
- spin_unlock_irqrestore(&up->port.lock, flags);
-}
-
-static const char *sunsab_type(struct uart_port *port)
-{
- struct uart_sunsab_port *up = (void *)port;
- static char buf[36];
-
- sprintf(buf, "SAB82532 %s", sab82532_version[up->type]);
- return buf;
-}
-
-static void sunsab_release_port(struct uart_port *port)
-{
-}
-
-static int sunsab_request_port(struct uart_port *port)
-{
- return 0;
-}
-
-static void sunsab_config_port(struct uart_port *port, int flags)
-{
-}
-
-static int sunsab_verify_port(struct uart_port *port, struct serial_struct *ser)
-{
- return -EINVAL;
-}
-
-static struct uart_ops sunsab_pops = {
- .tx_empty = sunsab_tx_empty,
- .set_mctrl = sunsab_set_mctrl,
- .get_mctrl = sunsab_get_mctrl,
- .stop_tx = sunsab_stop_tx,
- .start_tx = sunsab_start_tx,
- .send_xchar = sunsab_send_xchar,
- .stop_rx = sunsab_stop_rx,
- .enable_ms = sunsab_enable_ms,
- .break_ctl = sunsab_break_ctl,
- .startup = sunsab_startup,
- .shutdown = sunsab_shutdown,
- .set_termios = sunsab_set_termios,
- .type = sunsab_type,
- .release_port = sunsab_release_port,
- .request_port = sunsab_request_port,
- .config_port = sunsab_config_port,
- .verify_port = sunsab_verify_port,
-};
-
-static struct uart_driver sunsab_reg = {
- .owner = THIS_MODULE,
- .driver_name = "sunsab",
- .dev_name = "ttyS",
- .major = TTY_MAJOR,
-};
-
-static struct uart_sunsab_port *sunsab_ports;
-
-#ifdef CONFIG_SERIAL_SUNSAB_CONSOLE
-
-static void sunsab_console_putchar(struct uart_port *port, int c)
-{
- struct uart_sunsab_port *up = (struct uart_sunsab_port *)port;
-
- sunsab_tec_wait(up);
- writeb(c, &up->regs->w.tic);
-}
-
-static void sunsab_console_write(struct console *con, const char *s, unsigned n)
-{
- struct uart_sunsab_port *up = &sunsab_ports[con->index];
- unsigned long flags;
- int locked = 1;
-
- local_irq_save(flags);
- if (up->port.sysrq) {
- locked = 0;
- } else if (oops_in_progress) {
- locked = spin_trylock(&up->port.lock);
- } else
- spin_lock(&up->port.lock);
-
- uart_console_write(&up->port, s, n, sunsab_console_putchar);
- sunsab_tec_wait(up);
-
- if (locked)
- spin_unlock(&up->port.lock);
- local_irq_restore(flags);
-}
-
-static int sunsab_console_setup(struct console *con, char *options)
-{
- struct uart_sunsab_port *up = &sunsab_ports[con->index];
- unsigned long flags;
- unsigned int baud, quot;
-
- /*
- * The console framework calls us for each and every port
- * registered. Defer the console setup until the requested
- * port has been properly discovered. A bit of a hack,
- * though...
- */
- if (up->port.type != PORT_SUNSAB)
- return -1;
-
- printk("Console: ttyS%d (SAB82532)\n",
- (sunsab_reg.minor - 64) + con->index);
-
- sunserial_console_termios(con, up->port.dev->of_node);
-
- switch (con->cflag & CBAUD) {
- case B150: baud = 150; break;
- case B300: baud = 300; break;
- case B600: baud = 600; break;
- case B1200: baud = 1200; break;
- case B2400: baud = 2400; break;
- case B4800: baud = 4800; break;
- default: case B9600: baud = 9600; break;
- case B19200: baud = 19200; break;
- case B38400: baud = 38400; break;
- case B57600: baud = 57600; break;
- case B115200: baud = 115200; break;
- case B230400: baud = 230400; break;
- case B460800: baud = 460800; break;
- };
-
- /*
- * Temporary fix.
- */
- spin_lock_init(&up->port.lock);
-
- /*
- * Initialize the hardware
- */
- sunsab_startup(&up->port);
-
- spin_lock_irqsave(&up->port.lock, flags);
-
- /*
- * Finally, enable interrupts
- */
- up->interrupt_mask0 = SAB82532_IMR0_PERR | SAB82532_IMR0_FERR |
- SAB82532_IMR0_PLLA | SAB82532_IMR0_CDSC;
- writeb(up->interrupt_mask0, &up->regs->w.imr0);
- up->interrupt_mask1 = SAB82532_IMR1_BRKT | SAB82532_IMR1_ALLS |
- SAB82532_IMR1_XOFF | SAB82532_IMR1_TIN |
- SAB82532_IMR1_CSC | SAB82532_IMR1_XON |
- SAB82532_IMR1_XPR;
- writeb(up->interrupt_mask1, &up->regs->w.imr1);
-
- quot = uart_get_divisor(&up->port, baud);
- sunsab_convert_to_sab(up, con->cflag, 0, baud, quot);
- sunsab_set_mctrl(&up->port, TIOCM_DTR | TIOCM_RTS);
-
- spin_unlock_irqrestore(&up->port.lock, flags);
-
- return 0;
-}
-
-static struct console sunsab_console = {
- .name = "ttyS",
- .write = sunsab_console_write,
- .device = uart_console_device,
- .setup = sunsab_console_setup,
- .flags = CON_PRINTBUFFER,
- .index = -1,
- .data = &sunsab_reg,
-};
-
-static inline struct console *SUNSAB_CONSOLE(void)
-{
- return &sunsab_console;
-}
-#else
-#define SUNSAB_CONSOLE() (NULL)
-#define sunsab_console_init() do { } while (0)
-#endif
-
-static int __devinit sunsab_init_one(struct uart_sunsab_port *up,
- struct platform_device *op,
- unsigned long offset,
- int line)
-{
- up->port.line = line;
- up->port.dev = &op->dev;
-
- up->port.mapbase = op->resource[0].start + offset;
- up->port.membase = of_ioremap(&op->resource[0], offset,
- sizeof(union sab82532_async_regs),
- "sab");
- if (!up->port.membase)
- return -ENOMEM;
- up->regs = (union sab82532_async_regs __iomem *) up->port.membase;
-
- up->port.irq = op->archdata.irqs[0];
-
- up->port.fifosize = SAB82532_XMIT_FIFO_SIZE;
- up->port.iotype = UPIO_MEM;
-
- writeb(SAB82532_IPC_IC_ACT_LOW, &up->regs->w.ipc);
-
- up->port.ops = &sunsab_pops;
- up->port.type = PORT_SUNSAB;
- up->port.uartclk = SAB_BASE_BAUD;
-
- up->type = readb(&up->regs->r.vstr) & 0x0f;
- writeb(~((1 << 1) | (1 << 2) | (1 << 4)), &up->regs->w.pcr);
- writeb(0xff, &up->regs->w.pim);
- if ((up->port.line & 0x1) == 0) {
- up->pvr_dsr_bit = (1 << 0);
- up->pvr_dtr_bit = (1 << 1);
- up->gis_shift = 2;
- } else {
- up->pvr_dsr_bit = (1 << 3);
- up->pvr_dtr_bit = (1 << 2);
- up->gis_shift = 0;
- }
- up->cached_pvr = (1 << 1) | (1 << 2) | (1 << 4);
- writeb(up->cached_pvr, &up->regs->w.pvr);
- up->cached_mode = readb(&up->regs->rw.mode);
- up->cached_mode |= SAB82532_MODE_FRTS;
- writeb(up->cached_mode, &up->regs->rw.mode);
- up->cached_mode |= SAB82532_MODE_RTS;
- writeb(up->cached_mode, &up->regs->rw.mode);
-
- up->tec_timeout = SAB82532_MAX_TEC_TIMEOUT;
- up->cec_timeout = SAB82532_MAX_CEC_TIMEOUT;
-
- return 0;
-}
-
-static int __devinit sab_probe(struct platform_device *op, const struct of_device_id *match)
-{
- static int inst;
- struct uart_sunsab_port *up;
- int err;
-
- up = &sunsab_ports[inst * 2];
-
- err = sunsab_init_one(&up[0], op,
- 0,
- (inst * 2) + 0);
- if (err)
- goto out;
-
- err = sunsab_init_one(&up[1], op,
- sizeof(union sab82532_async_regs),
- (inst * 2) + 1);
- if (err)
- goto out1;
-
- sunserial_console_match(SUNSAB_CONSOLE(), op->dev.of_node,
- &sunsab_reg, up[0].port.line,
- false);
-
- sunserial_console_match(SUNSAB_CONSOLE(), op->dev.of_node,
- &sunsab_reg, up[1].port.line,
- false);
-
- err = uart_add_one_port(&sunsab_reg, &up[0].port);
- if (err)
- goto out2;
-
- err = uart_add_one_port(&sunsab_reg, &up[1].port);
- if (err)
- goto out3;
-
- dev_set_drvdata(&op->dev, &up[0]);
-
- inst++;
-
- return 0;
-
-out3:
- uart_remove_one_port(&sunsab_reg, &up[0].port);
-out2:
- of_iounmap(&op->resource[0],
- up[1].port.membase,
- sizeof(union sab82532_async_regs));
-out1:
- of_iounmap(&op->resource[0],
- up[0].port.membase,
- sizeof(union sab82532_async_regs));
-out:
- return err;
-}
-
-static int __devexit sab_remove(struct platform_device *op)
-{
- struct uart_sunsab_port *up = dev_get_drvdata(&op->dev);
-
- uart_remove_one_port(&sunsab_reg, &up[1].port);
- uart_remove_one_port(&sunsab_reg, &up[0].port);
- of_iounmap(&op->resource[0],
- up[1].port.membase,
- sizeof(union sab82532_async_regs));
- of_iounmap(&op->resource[0],
- up[0].port.membase,
- sizeof(union sab82532_async_regs));
-
- dev_set_drvdata(&op->dev, NULL);
-
- return 0;
-}
-
-static const struct of_device_id sab_match[] = {
- {
- .name = "se",
- },
- {
- .name = "serial",
- .compatible = "sab82532",
- },
- {},
-};
-MODULE_DEVICE_TABLE(of, sab_match);
-
-static struct of_platform_driver sab_driver = {
- .driver = {
- .name = "sab",
- .owner = THIS_MODULE,
- .of_match_table = sab_match,
- },
- .probe = sab_probe,
- .remove = __devexit_p(sab_remove),
-};
-
-static int __init sunsab_init(void)
-{
- struct device_node *dp;
- int err;
- int num_channels = 0;
-
- for_each_node_by_name(dp, "se")
- num_channels += 2;
- for_each_node_by_name(dp, "serial") {
- if (of_device_is_compatible(dp, "sab82532"))
- num_channels += 2;
- }
-
- if (num_channels) {
- sunsab_ports = kzalloc(sizeof(struct uart_sunsab_port) *
- num_channels, GFP_KERNEL);
- if (!sunsab_ports)
- return -ENOMEM;
-
- err = sunserial_register_minors(&sunsab_reg, num_channels);
- if (err) {
- kfree(sunsab_ports);
- sunsab_ports = NULL;
-
- return err;
- }
- }
-
- return of_register_platform_driver(&sab_driver);
-}
-
-static void __exit sunsab_exit(void)
-{
- of_unregister_platform_driver(&sab_driver);
- if (sunsab_reg.nr) {
- sunserial_unregister_minors(&sunsab_reg, sunsab_reg.nr);
- }
-
- kfree(sunsab_ports);
- sunsab_ports = NULL;
-}
-
-module_init(sunsab_init);
-module_exit(sunsab_exit);
-
-MODULE_AUTHOR("Eddie C. Dost and David S. Miller");
-MODULE_DESCRIPTION("Sun SAB82532 serial port driver");
-MODULE_LICENSE("GPL");