patch-2.4.26 linux-2.4.26/arch/ppc/8260_io/uart.c
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- Lines: 2788
- Date:
1969-12-31 16:00:00.000000000 -0800
- Orig file:
linux-2.4.25/arch/ppc/8260_io/uart.c
- Orig date:
2003-11-28 10:26:19.000000000 -0800
diff -urN linux-2.4.25/arch/ppc/8260_io/uart.c linux-2.4.26/arch/ppc/8260_io/uart.c
@@ -1,2787 +0,0 @@
-/*
- * UART driver for MPC8260 CPM SCC or SMC
- * Copyright (c) 1999 Dan Malek (dmalek@jlc.net)
- * Copyright (c) 2000 MontaVista Software, Inc. (source@mvista.com)
- * 2.3.99 updates
- *
- * I used the 8xx uart.c driver as the framework for this driver.
- * The original code was written for the EST8260 board. I tried to make
- * it generic, but there may be some assumptions in the structures that
- * have to be fixed later.
- *
- * The 8xx and 8260 are similar, but not identical. Over time we
- * could probably merge these two drivers.
- * To save porting time, I did not bother to change any object names
- * that are not accessed outside of this file.
- * It still needs lots of work........When it was easy, I included code
- * to support the SCCs.
- * Only the SCCs support modem control, so that is not complete either.
- *
- * This module exports the following rs232 io functions:
- *
- * int rs_8xx_init(void);
- */
-
-#include <linux/config.h>
-#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/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/serialP.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <asm/uaccess.h>
-#include <asm/immap_8260.h>
-#include <asm/mpc8260.h>
-#include <asm/cpm_8260.h>
-#include <asm/irq.h>
-
-#ifdef CONFIG_MAGIC_SYSRQ
-#include <linux/sysrq.h>
-#endif
-
-#ifdef CONFIG_SERIAL_CONSOLE
-#include <linux/console.h>
-
-/* this defines the index into rs_table for the port to use
-*/
-#ifndef CONFIG_SERIAL_CONSOLE_PORT
-#define CONFIG_SERIAL_CONSOLE_PORT 0
-#endif
-#endif
-
-#define TX_WAKEUP ASYNC_SHARE_IRQ
-
-static char *serial_name = "CPM UART driver";
-static char *serial_version = "0.01";
-
-static DECLARE_TASK_QUEUE(tq_serial);
-
-static struct tty_driver serial_driver, callout_driver;
-static int serial_refcount;
-static int serial_console_setup(struct console *co, char *options);
-
-static void serial_console_write(struct console *c, const char *s,
- unsigned count);
-static kdev_t serial_console_device(struct console *c);
-
-#if defined(CONFIG_SERIAL_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
-static unsigned long break_pressed; /* break, really ... */
-#endif
-
-/*
- * Serial driver configuration section. Here are the various options:
- */
-#define SERIAL_PARANOIA_CHECK
-#define CONFIG_SERIAL_NOPAUSE_IO
-#define SERIAL_DO_RESTART
-
-/* Set of debugging defines */
-
-#undef SERIAL_DEBUG_INTR
-#undef SERIAL_DEBUG_OPEN
-#undef SERIAL_DEBUG_FLOW
-#undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
-
-#define _INLINE_ inline
-
-#define DBG_CNT(s)
-
-/* We overload some of the items in the data structure to meet our
- * needs. For example, the port address is the CPM parameter ram
- * offset for the SCC or SMC. The maximum number of ports is 4 SCCs and
- * 2 SMCs. The "hub6" field is used to indicate the channel number, with
- * 0 and 1 indicating the SMCs and 2, 3, 4, and 5 are the SCCs.
- * Since these ports are so versatile, I don't yet have a strategy for
- * their management. For example, SCC1 is used for Ethernet. Right
- * now, just don't put them in the table. Of course, right now I just
- * want the SMC to work as a uart :-)..
- * The "type" field is currently set to 0, for PORT_UNKNOWN. It is
- * not currently used. I should probably use it to indicate the port
- * type of CMS or SCC.
- * The SMCs do not support any modem control signals.
- */
-#define smc_scc_num hub6
-
-/* SMC2 is sometimes used for low performance TDM interfaces. Define
- * this as 1 if you want SMC2 as a serial port UART managed by this driver.
- * Define this as 0 if you wish to use SMC2 for something else.
- */
-#define USE_SMC2 1
-
-/* Define SCC to ttySx mapping.
-*/
-#define SCC_NUM_BASE (USE_SMC2 + 1) /* SCC base tty "number" */
-
-/* Define which SCC is the first one to use for a serial port. These
- * are 0-based numbers, i.e. this assumes the first SCC (SCC1) is used
- * for Ethernet, and the first available SCC for serial UART is SCC2.
- * NOTE: IF YOU CHANGE THIS, you have to change the PROFF_xxx and
- * interrupt vectors in the table below to match.
- */
-#define SCC_IDX_BASE 1 /* table index */
-
-static struct serial_state rs_table[] = {
- /* UART CLK PORT IRQ FLAGS NUM */
- { 0, 0, PROFF_SMC1, SIU_INT_SMC1, 0, 0 }, /* SMC1 ttyS0 */
-#if USE_SMC2
- { 0, 0, PROFF_SMC2, SIU_INT_SMC2, 0, 1 }, /* SMC2 ttyS1 */
-#endif
- { 0, 0, PROFF_SCC2, SIU_INT_SCC2, 0, SCC_NUM_BASE}, /* SCC2 ttyS2 */
- { 0, 0, PROFF_SCC3, SIU_INT_SCC3, 0, SCC_NUM_BASE + 1}, /* SCC3 ttyS3 */
-};
-
-#define NR_PORTS (sizeof(rs_table)/sizeof(struct serial_state))
-
-static struct tty_struct *serial_table[NR_PORTS];
-static struct termios *serial_termios[NR_PORTS];
-static struct termios *serial_termios_locked[NR_PORTS];
-
-/* The number of buffer descriptors and their sizes.
-*/
-#define RX_NUM_FIFO 4
-#define RX_BUF_SIZE 32
-#define TX_NUM_FIFO 4
-#define TX_BUF_SIZE 32
-
-#ifndef MIN
-#define MIN(a,b) ((a) < (b) ? (a) : (b))
-#endif
-
-/* The async_struct in serial.h does not really give us what we
- * need, so define our own here.
- */
-typedef struct serial_info {
- int magic;
- int flags;
- struct serial_state *state;
- struct tty_struct *tty;
- int read_status_mask;
- int ignore_status_mask;
- int timeout;
- int line;
- int x_char; /* xon/xoff character */
- int close_delay;
- unsigned short closing_wait;
- unsigned short closing_wait2;
- unsigned long event;
- unsigned long last_active;
- int blocked_open; /* # of blocked opens */
- long session; /* Session of opening process */
- long pgrp; /* pgrp of opening process */
- struct tq_struct tqueue;
- struct tq_struct tqueue_hangup;
- wait_queue_head_t open_wait;
- wait_queue_head_t close_wait;
-
- /* CPM Buffer Descriptor pointers.
- */
- cbd_t *rx_bd_base;
- cbd_t *rx_cur;
- cbd_t *tx_bd_base;
- cbd_t *tx_cur;
-} ser_info_t;
-
-static struct console sercons = {
- name: "ttyS",
- write: serial_console_write,
- device: serial_console_device,
- setup: serial_console_setup,
- flags: CON_PRINTBUFFER,
- index: CONFIG_SERIAL_CONSOLE_PORT,
-};
-
-
-static void change_speed(ser_info_t *info);
-static void rs_8xx_wait_until_sent(struct tty_struct *tty, int timeout);
-
-static inline int serial_paranoia_check(ser_info_t *info,
- kdev_t device, const char *routine)
-{
-#ifdef SERIAL_PARANOIA_CHECK
- static const char *badmagic =
- "Warning: bad magic number for serial struct (%s) in %s\n";
- static const char *badinfo =
- "Warning: null async_struct for (%s) in %s\n";
-
- if (!info) {
- printk(badinfo, kdevname(device), routine);
- return 1;
- }
- if (info->magic != SERIAL_MAGIC) {
- printk(badmagic, kdevname(device), routine);
- return 1;
- }
-#endif
- return 0;
-}
-
-/*
- * This is used to figure out the divisor speeds and the timeouts,
- * indexed by the termio value. The generic CPM functions are responsible
- * for setting and assigning baud rate generators for us.
- */
-static int baud_table[] = {
- 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
- 9600, 19200, 38400, 57600, 115200, 230400, 460800, 0 };
-
-
-/*
- * ------------------------------------------------------------
- * rs_stop() and rs_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * They enable or disable transmitter interrupts, as necessary.
- * ------------------------------------------------------------
- */
-static void rs_8xx_stop(struct tty_struct *tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- int idx;
- unsigned long flags;
- volatile scc_t *sccp;
- volatile smc_t *smcp;
-
- if (serial_paranoia_check(info, tty->device, "rs_stop"))
- return;
-
- save_flags(flags); cli();
- if ((idx = info->state->smc_scc_num) < SCC_NUM_BASE) {
- smcp = &immr->im_smc[idx];
- smcp->smc_smcm &= ~SMCM_TX;
- }
- else {
- sccp = &immr->im_scc[idx - SCC_IDX_BASE];
- sccp->scc_sccm &= ~UART_SCCM_TX;
- }
- restore_flags(flags);
-}
-
-static void rs_8xx_start(struct tty_struct *tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- int idx;
- unsigned long flags;
- volatile scc_t *sccp;
- volatile smc_t *smcp;
-
- if (serial_paranoia_check(info, tty->device, "rs_stop"))
- return;
-
- save_flags(flags); cli();
- if ((idx = info->state->smc_scc_num) < SCC_NUM_BASE) {
- smcp = &immr->im_smc[idx];
- smcp->smc_smcm |= SMCM_TX;
- }
- else {
- sccp = &immr->im_scc[idx - SCC_IDX_BASE];
- sccp->scc_sccm |= UART_SCCM_TX;
- }
- restore_flags(flags);
-}
-
-/*
- * ----------------------------------------------------------------------
- *
- * Here starts the interrupt handling routines. All of the following
- * subroutines are declared as inline and are folded into
- * rs_interrupt(). They were separated out for readability's sake.
- *
- * Note: rs_interrupt() is a "fast" interrupt, which means that it
- * runs with interrupts turned off. People who may want to modify
- * rs_interrupt() should try to keep the interrupt handler as fast as
- * possible. After you are done making modifications, it is not a bad
- * idea to do:
- *
- * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
- *
- * and look at the resulting assemble code in serial.s.
- *
- * - Ted Ts'o (tytso@mit.edu), 7-Mar-93
- * -----------------------------------------------------------------------
- */
-
-/*
- * This routine is used by the interrupt handler to schedule
- * processing in the software interrupt portion of the driver.
- */
-static _INLINE_ void rs_sched_event(ser_info_t *info,
- int event)
-{
- info->event |= 1 << event;
- queue_task(&info->tqueue, &tq_serial);
- mark_bh(SERIAL_BH);
-}
-
-static _INLINE_ void receive_chars(ser_info_t *info, struct pt_regs *regs)
-{
- struct tty_struct *tty = info->tty;
- unsigned char ch, *cp;
- /*int ignored = 0;*/
- int i;
- ushort status;
- struct async_icount *icount;
- volatile cbd_t *bdp;
-
- icount = &info->state->icount;
-
- /* Just loop through the closed BDs and copy the characters into
- * the buffer.
- */
- bdp = info->rx_cur;
- for (;;) {
- if (bdp->cbd_sc & BD_SC_EMPTY) /* If this one is empty */
- break; /* we are all done */
-
- /* The read status mask tell us what we should do with
- * incoming characters, especially if errors occur.
- * One special case is the use of BD_SC_EMPTY. If
- * this is not set, we are supposed to be ignoring
- * inputs. In this case, just mark the buffer empty and
- * continue.
- if (!(info->read_status_mask & BD_SC_EMPTY)) {
- bdp->cbd_sc |= BD_SC_EMPTY;
- bdp->cbd_sc &=
- ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV);
-
- if (bdp->cbd_sc & BD_SC_WRAP)
- bdp = info->rx_bd_base;
- else
- bdp++;
- continue;
- }
- */
-
- /* Get the number of characters and the buffer pointer.
- */
- i = bdp->cbd_datlen;
- cp = (unsigned char *)__va(bdp->cbd_bufaddr);
- status = bdp->cbd_sc;
-
- /* Check to see if there is room in the tty buffer for
- * the characters in our BD buffer. If not, we exit
- * now, leaving the BD with the characters. We'll pick
- * them up again on the next receive interrupt (which could
- * be a timeout).
- */
- if ((tty->flip.count + i) >= TTY_FLIPBUF_SIZE)
- break;
-
- while (i-- > 0) {
- ch = *cp++;
- *tty->flip.char_buf_ptr = ch;
- icount->rx++;
-
-#ifdef SERIAL_DEBUG_INTR
- printk("DR%02x:%02x...", ch, *status);
-#endif
- *tty->flip.flag_buf_ptr = 0;
- if (status & (BD_SC_BR | BD_SC_FR |
- BD_SC_PR | BD_SC_OV)) {
- /*
- * For statistics only
- */
- if (status & BD_SC_BR)
- icount->brk++;
- else if (status & BD_SC_PR)
- icount->parity++;
- else if (status & BD_SC_FR)
- icount->frame++;
- if (status & BD_SC_OV)
- icount->overrun++;
-
- /*
- * Now check to see if character should be
- * ignored, and mask off conditions which
- * should be ignored.
- if (status & info->ignore_status_mask) {
- if (++ignored > 100)
- break;
- continue;
- }
- */
- status &= info->read_status_mask;
-
- if (status & (BD_SC_BR)) {
-#ifdef SERIAL_DEBUG_INTR
- printk("handling break....");
-#endif
- *tty->flip.flag_buf_ptr = TTY_BREAK;
- if (info->flags & ASYNC_SAK)
- do_SAK(tty);
- } else if (status & BD_SC_PR)
- *tty->flip.flag_buf_ptr = TTY_PARITY;
- else if (status & BD_SC_FR)
- *tty->flip.flag_buf_ptr = TTY_FRAME;
- if (status & BD_SC_OV) {
- /*
- * Overrun is special, since it's
- * reported immediately, and doesn't
- * affect the current character
- */
- if (tty->flip.count < TTY_FLIPBUF_SIZE) {
- tty->flip.count++;
- tty->flip.flag_buf_ptr++;
- tty->flip.char_buf_ptr++;
- *tty->flip.flag_buf_ptr =
- TTY_OVERRUN;
- }
- }
- }
-
-#if defined(CONFIG_SERIAL_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
- if (break_pressed && info->line == sercons.index) {
- if (ch != 0 && time_before(jiffies,
- break_pressed + HZ*5)) {
- handle_sysrq(ch, regs, NULL, NULL);
- break_pressed = 0;
- goto ignore_char;
- } else
- break_pressed = 0;
- }
-#endif
-
- if (tty->flip.count >= TTY_FLIPBUF_SIZE)
- break;
-
- tty->flip.flag_buf_ptr++;
- tty->flip.char_buf_ptr++;
- tty->flip.count++;
- }
-
-#if defined(CONFIG_SERIAL_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
- ignore_char:
-#endif
-
- /* This BD is ready to be used again. Clear status.
- * Get next BD.
- */
- bdp->cbd_sc |= BD_SC_EMPTY;
- bdp->cbd_sc &= ~(BD_SC_BR | BD_SC_FR | BD_SC_PR | BD_SC_OV);
-
- if (bdp->cbd_sc & BD_SC_WRAP)
- bdp = info->rx_bd_base;
- else
- bdp++;
- }
-
- info->rx_cur = (cbd_t *)bdp;
-
- queue_task(&tty->flip.tqueue, &tq_timer);
-}
-
-static _INLINE_ void receive_break(ser_info_t *info, struct pt_regs *regs)
-{
- struct tty_struct *tty = info->tty;
-
- info->state->icount.brk++;
-
-#if defined(CONFIG_SERIAL_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
- if (info->line == sercons.index) {
- if (!break_pressed) {
- break_pressed = jiffies;
- return;
- } else
- break_pressed = 0;
- }
-#endif
-
- /* Check to see if there is room in the tty buffer for
- * the break. If not, we exit now, losing the break. FIXME
- */
- if ((tty->flip.count + 1) >= TTY_FLIPBUF_SIZE)
- return;
- *(tty->flip.flag_buf_ptr++) = TTY_BREAK;
- *(tty->flip.char_buf_ptr++) = 0;
- tty->flip.count++;
-
- queue_task(&tty->flip.tqueue, &tq_timer);
-}
-
-
-static _INLINE_ void transmit_chars(ser_info_t *info, struct pt_regs *regs)
-{
-
- if (info->flags & TX_WAKEUP) {
- rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
- }
-
-#ifdef SERIAL_DEBUG_INTR
- printk("THRE...");
-#endif
-}
-
-#ifdef notdef
- /* I need to do this for the SCCs, so it is left as a reminder.
- */
-static _INLINE_ void check_modem_status(struct async_struct *info)
-{
- int status;
- struct async_icount *icount;
-
- status = serial_in(info, UART_MSR);
-
- if (status & UART_MSR_ANY_DELTA) {
- icount = &info->state->icount;
- /* update input line counters */
- if (status & UART_MSR_TERI)
- icount->rng++;
- if (status & UART_MSR_DDSR)
- icount->dsr++;
- if (status & UART_MSR_DDCD) {
- icount->dcd++;
-#ifdef CONFIG_HARD_PPS
- if ((info->flags & ASYNC_HARDPPS_CD) &&
- (status & UART_MSR_DCD))
- hardpps();
-#endif
- }
- if (status & UART_MSR_DCTS)
- icount->cts++;
- wake_up_interruptible(&info->delta_msr_wait);
- }
-
- if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
-#if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
- printk("ttys%d CD now %s...", info->line,
- (status & UART_MSR_DCD) ? "on" : "off");
-#endif
- if (status & UART_MSR_DCD)
- wake_up_interruptible(&info->open_wait);
- else if (!((info->flags & ASYNC_CALLOUT_ACTIVE) &&
- (info->flags & ASYNC_CALLOUT_NOHUP))) {
-#ifdef SERIAL_DEBUG_OPEN
- printk("scheduling hangup...");
-#endif
- MOD_INC_USE_COUNT;
- if (schedule_task(&info->tqueue_hangup) == 0)
- MOD_DEC_USE_COUNT;
- }
- }
- if (info->flags & ASYNC_CTS_FLOW) {
- if (info->tty->hw_stopped) {
- if (status & UART_MSR_CTS) {
-#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
- printk("CTS tx start...");
-#endif
- info->tty->hw_stopped = 0;
- info->IER |= UART_IER_THRI;
- serial_out(info, UART_IER, info->IER);
- rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
- return;
- }
- } else {
- if (!(status & UART_MSR_CTS)) {
-#if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
- printk("CTS tx stop...");
-#endif
- info->tty->hw_stopped = 1;
- info->IER &= ~UART_IER_THRI;
- serial_out(info, UART_IER, info->IER);
- }
- }
- }
-}
-#endif
-
-/*
- * This is the serial driver's interrupt routine for a single port
- */
-static void rs_8xx_interrupt(int irq, void * dev_id, struct pt_regs * regs)
-{
- u_char events;
- int idx;
- ser_info_t *info;
- volatile smc_t *smcp;
- volatile scc_t *sccp;
-
- info = (ser_info_t *)dev_id;
-
- if ((idx = info->state->smc_scc_num) < SCC_NUM_BASE) {
- smcp = &immr->im_smc[idx];
- events = smcp->smc_smce;
- if (events & SMCM_BRKE)
- receive_break(info, regs);
- if (events & SMCM_RX)
- receive_chars(info, regs);
- if (events & SMCM_TX)
- transmit_chars(info, regs);
- smcp->smc_smce = events;
- }
- else {
- sccp = &immr->im_scc[idx - SCC_IDX_BASE];
- events = sccp->scc_scce;
- if (events & SMCM_BRKE)
- receive_break(info, regs);
- if (events & SCCM_RX)
- receive_chars(info, regs);
- if (events & SCCM_TX)
- transmit_chars(info, regs);
- sccp->scc_scce = events;
- }
-
-#ifdef SERIAL_DEBUG_INTR
- printk("rs_interrupt_single(%d, %x)...",
- info->state->smc_scc_num, events);
-#endif
-#ifdef modem_control
- check_modem_status(info);
-#endif
- info->last_active = jiffies;
-#ifdef SERIAL_DEBUG_INTR
- printk("end.\n");
-#endif
-}
-
-
-/*
- * -------------------------------------------------------------------
- * Here ends the serial interrupt routines.
- * -------------------------------------------------------------------
- */
-
-/*
- * This routine is used to handle the "bottom half" processing for the
- * serial driver, known also the "software interrupt" processing.
- * This processing is done at the kernel interrupt level, after the
- * rs_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
- * is where time-consuming activities which can not be done in the
- * interrupt driver proper are done; the interrupt driver schedules
- * them using rs_sched_event(), and they get done here.
- */
-static void do_serial_bh(void)
-{
- run_task_queue(&tq_serial);
-}
-
-static void do_softint(void *private_)
-{
- ser_info_t *info = (ser_info_t *) private_;
- struct tty_struct *tty;
-
- tty = info->tty;
- if (!tty)
- return;
-
- if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) {
- if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
- tty->ldisc.write_wakeup)
- (tty->ldisc.write_wakeup)(tty);
- wake_up_interruptible(&tty->write_wait);
- }
-}
-
-/*
- * This routine is called from the scheduler tqueue when the interrupt
- * routine has signalled that a hangup has occurred. The path of
- * hangup processing is:
- *
- * serial interrupt routine -> (scheduler tqueue) ->
- * do_serial_hangup() -> tty->hangup() -> rs_hangup()
- *
- */
-static void do_serial_hangup(void *private_)
-{
- struct async_struct *info = (struct async_struct *) private_;
- struct tty_struct *tty;
-
- tty = info->tty;
- if (tty)
- tty_hangup(tty);
- MOD_DEC_USE_COUNT;
-}
-
-/*static void rs_8xx_timer(void)
-{
- printk("rs_8xx_timer\n");
-}*/
-
-
-static int startup(ser_info_t *info)
-{
- unsigned long flags;
- int retval=0;
- int idx;
- struct serial_state *state= info->state;
- volatile smc_t *smcp;
- volatile scc_t *sccp;
- volatile smc_uart_t *up;
- volatile scc_uart_t *scup;
-
-
- save_flags(flags); cli();
-
- if (info->flags & ASYNC_INITIALIZED) {
- goto errout;
- }
-
-#ifdef maybe
- if (!state->port || !state->type) {
- if (info->tty)
- set_bit(TTY_IO_ERROR, &info->tty->flags);
- goto errout;
- }
-#endif
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("starting up ttys%d (irq %d)...", info->line, state->irq);
-#endif
-
-
-#ifdef modem_control
- info->MCR = 0;
- if (info->tty->termios->c_cflag & CBAUD)
- info->MCR = UART_MCR_DTR | UART_MCR_RTS;
-#endif
-
- if (info->tty)
- clear_bit(TTY_IO_ERROR, &info->tty->flags);
-
- /*
- * and set the speed of the serial port
- */
- change_speed(info);
-
- if ((idx = info->state->smc_scc_num) < SCC_NUM_BASE) {
- smcp = &immr->im_smc[idx];
-
- /* Enable interrupts and I/O.
- */
- smcp->smc_smcm |= (SMCM_RX | SMCM_TX);
- smcp->smc_smcmr |= (SMCMR_REN | SMCMR_TEN);
-
- /* We can tune the buffer length and idle characters
- * to take advantage of the entire incoming buffer size.
- * If mrblr is something other than 1, maxidl has to be
- * non-zero or we never get an interrupt. The maxidl
- * is the number of character times we wait after reception
- * of the last character before we decide no more characters
- * are coming.
- */
- up = (smc_uart_t *)&immr->im_dprambase[state->port];
-#if 0
- up->smc_mrblr = 1; /* receive buffer length */
- up->smc_maxidl = 0; /* wait forever for next char */
-#else
- up->smc_mrblr = RX_BUF_SIZE;
- up->smc_maxidl = RX_BUF_SIZE;
-#endif
- up->smc_brkcr = 1; /* number of break chars */
- }
- else {
- sccp = &immr->im_scc[idx - SCC_IDX_BASE];
- scup = (scc_uart_t *)&immr->im_dprambase[state->port];
-#if 0
- scup->scc_genscc.scc_mrblr = 1; /* receive buffer length */
- scup->scc_maxidl = 0; /* wait forever for next char */
-#else
- scup->scc_genscc.scc_mrblr = RX_BUF_SIZE;
- scup->scc_maxidl = RX_BUF_SIZE;
-#endif
-
- sccp->scc_sccm |= (UART_SCCM_TX | UART_SCCM_RX);
- sccp->scc_gsmrl |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
- }
-
- info->flags |= ASYNC_INITIALIZED;
- restore_flags(flags);
- return 0;
-
-errout:
- restore_flags(flags);
- return retval;
-}
-
-/*
- * This routine will shutdown a serial port; interrupts are disabled, and
- * DTR is dropped if the hangup on close termio flag is on.
- */
-static void shutdown(ser_info_t * info)
-{
- unsigned long flags;
- struct serial_state *state;
- int idx;
- volatile smc_t *smcp;
- volatile scc_t *sccp;
-
- if (!(info->flags & ASYNC_INITIALIZED))
- return;
-
- state = info->state;
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("Shutting down serial port %d (irq %d)....", info->line,
- state->irq);
-#endif
-
- save_flags(flags); cli(); /* Disable interrupts */
-
- if ((idx = info->state->smc_scc_num) < SCC_NUM_BASE) {
- smcp = &immr->im_smc[idx];
-
- /* Disable interrupts and I/O.
- */
- smcp->smc_smcm &= ~(SMCM_RX | SMCM_TX);
-#ifdef CONFIG_SERIAL_CONSOLE
- /* We can't disable the transmitter if this is the
- * system console.
- */
- if (idx != CONFIG_SERIAL_CONSOLE_PORT)
-#endif
- smcp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
- }
- else {
- sccp = &immr->im_scc[idx - SCC_IDX_BASE];
- sccp->scc_sccm &= ~(UART_SCCM_TX | UART_SCCM_RX);
- sccp->scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
- }
-
- if (info->tty)
- set_bit(TTY_IO_ERROR, &info->tty->flags);
-
- info->flags &= ~ASYNC_INITIALIZED;
- restore_flags(flags);
-}
-
-/*
- * This routine is called to set the UART divisor registers to match
- * the specified baud rate for a serial port.
- */
-static void change_speed(ser_info_t *info)
-{
- int baud_rate;
- unsigned cflag, cval, scval, prev_mode;
- int i, bits, sbits, idx;
- unsigned long flags;
- volatile smc_t *smcp;
- volatile scc_t *sccp;
-
- if (!info->tty || !info->tty->termios)
- return;
- cflag = info->tty->termios->c_cflag;
-
- /* Character length programmed into the mode register is the
- * sum of: 1 start bit, number of data bits, 0 or 1 parity bit,
- * 1 or 2 stop bits, minus 1.
- * The value 'bits' counts this for us.
- */
- cval = 0;
- scval = 0;
-
- /* byte size and parity */
- switch (cflag & CSIZE) {
- case CS5: bits = 5; break;
- case CS6: bits = 6; break;
- case CS7: bits = 7; break;
- case CS8: bits = 8; break;
- /* Never happens, but GCC is too dumb to figure it out */
- default: bits = 8; break;
- }
- sbits = bits - 5;
-
- if (cflag & CSTOPB) {
- cval |= SMCMR_SL; /* Two stops */
- scval |= SCU_PMSR_SL;
- bits++;
- }
- if (cflag & PARENB) {
- cval |= SMCMR_PEN;
- scval |= SCU_PMSR_PEN;
- bits++;
- }
- if (!(cflag & PARODD)) {
- cval |= SMCMR_PM_EVEN;
- scval |= (SCU_PMSR_REVP | SCU_PMSR_TEVP);
- }
-
- /* Determine divisor based on baud rate */
- i = cflag & CBAUD;
- if (i >= (sizeof(baud_table)/sizeof(int)))
- baud_rate = 9600;
- else
- baud_rate = baud_table[i];
-
- info->timeout = (TX_BUF_SIZE*HZ*bits);
- info->timeout += HZ/50; /* Add .02 seconds of slop */
-
-#ifdef modem_control
- /* CTS flow control flag and modem status interrupts */
- info->IER &= ~UART_IER_MSI;
- if (info->flags & ASYNC_HARDPPS_CD)
- info->IER |= UART_IER_MSI;
- if (cflag & CRTSCTS) {
- info->flags |= ASYNC_CTS_FLOW;
- info->IER |= UART_IER_MSI;
- } else
- info->flags &= ~ASYNC_CTS_FLOW;
- if (cflag & CLOCAL)
- info->flags &= ~ASYNC_CHECK_CD;
- else {
- info->flags |= ASYNC_CHECK_CD;
- info->IER |= UART_IER_MSI;
- }
- serial_out(info, UART_IER, info->IER);
-#endif
-
- /*
- * Set up parity check flag
- */
-#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
-
- info->read_status_mask = (BD_SC_EMPTY | BD_SC_OV);
- if (I_INPCK(info->tty))
- info->read_status_mask |= BD_SC_FR | BD_SC_PR;
- if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
- info->read_status_mask |= BD_SC_BR;
-
- /*
- * Characters to ignore
- */
- info->ignore_status_mask = 0;
- if (I_IGNPAR(info->tty))
- info->ignore_status_mask |= BD_SC_PR | BD_SC_FR;
- if (I_IGNBRK(info->tty)) {
- info->ignore_status_mask |= BD_SC_BR;
- /*
- * If we're ignore parity and break indicators, ignore
- * overruns too. (For real raw support).
- */
- if (I_IGNPAR(info->tty))
- info->ignore_status_mask |= BD_SC_OV;
- }
- /*
- * !!! ignore all characters if CREAD is not set
- */
- if ((cflag & CREAD) == 0)
- info->read_status_mask &= ~BD_SC_EMPTY;
- save_flags(flags); cli();
-
- /* Start bit has not been added (so don't, because we would just
- * subtract it later), and we need to add one for the number of
- * stops bits (there is always at least one).
- */
- bits++;
- if ((idx = info->state->smc_scc_num) < SCC_NUM_BASE) {
- smcp = &immr->im_smc[idx];
-
- /* Set the mode register. We want to keep a copy of the
- * enables, because we want to put them back if they were
- * present.
- */
- prev_mode = smcp->smc_smcmr & (SMCMR_REN | SMCMR_TEN);
- smcp->smc_smcmr = smcr_mk_clen(bits) | cval | SMCMR_SM_UART
- | prev_mode;
- }
- else {
- sccp = &immr->im_scc[idx - SCC_IDX_BASE];
- sccp->scc_pmsr = (sbits << 12) | scval;
- }
-
- m8260_cpm_setbrg(info->state->smc_scc_num, baud_rate);
-
- restore_flags(flags);
-}
-
-static void rs_8xx_put_char(struct tty_struct *tty, unsigned char ch)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- volatile cbd_t *bdp;
-
- if (serial_paranoia_check(info, tty->device, "rs_put_char"))
- return;
-
- if (!tty)
- return;
-
- bdp = info->tx_cur;
- while (bdp->cbd_sc & BD_SC_READY);
-
- *((char *)__va(bdp->cbd_bufaddr)) = ch;
- bdp->cbd_datlen = 1;
- bdp->cbd_sc |= BD_SC_READY;
-
- /* Get next BD.
- */
- if (bdp->cbd_sc & BD_SC_WRAP)
- bdp = info->tx_bd_base;
- else
- bdp++;
-
- info->tx_cur = (cbd_t *)bdp;
-
-}
-
-static int rs_8xx_write(struct tty_struct * tty, int from_user,
- const unsigned char *buf, int count)
-{
- int c, ret = 0;
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- volatile cbd_t *bdp;
-
- if (serial_paranoia_check(info, tty->device, "rs_write"))
- return 0;
-
- if (!tty)
- return 0;
-
- bdp = info->tx_cur;
-
- while (1) {
- c = MIN(count, TX_BUF_SIZE);
-
- if (c <= 0)
- break;
-
- if (bdp->cbd_sc & BD_SC_READY) {
- info->flags |= TX_WAKEUP;
- break;
- }
-
- if (from_user) {
- if (copy_from_user(__va(bdp->cbd_bufaddr), buf, c)) {
- if (!ret)
- ret = -EFAULT;
- break;
- }
- } else {
- memcpy(__va(bdp->cbd_bufaddr), buf, c);
- }
-
- bdp->cbd_datlen = c;
- bdp->cbd_sc |= BD_SC_READY;
-
- buf += c;
- count -= c;
- ret += c;
-
- /* Get next BD.
- */
- if (bdp->cbd_sc & BD_SC_WRAP)
- bdp = info->tx_bd_base;
- else
- bdp++;
- info->tx_cur = (cbd_t *)bdp;
- }
- return ret;
-}
-
-static int rs_8xx_write_room(struct tty_struct *tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- int ret;
-
- if (serial_paranoia_check(info, tty->device, "rs_write_room"))
- return 0;
-
- if ((info->tx_cur->cbd_sc & BD_SC_READY) == 0) {
- info->flags &= ~TX_WAKEUP;
- ret = TX_BUF_SIZE;
- }
- else {
- info->flags |= TX_WAKEUP;
- ret = 0;
- }
- return ret;
-}
-
-/* I could track this with transmit counters....maybe later.
-*/
-static int rs_8xx_chars_in_buffer(struct tty_struct *tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
-
- if (serial_paranoia_check(info, tty->device, "rs_chars_in_buffer"))
- return 0;
- return 0;
-}
-
-static void rs_8xx_flush_buffer(struct tty_struct *tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
-
- if (serial_paranoia_check(info, tty->device, "rs_flush_buffer"))
- return;
-
- /* There is nothing to "flush", whatever we gave the CPM
- * is on its way out.
- */
- wake_up_interruptible(&tty->write_wait);
- if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
- tty->ldisc.write_wakeup)
- (tty->ldisc.write_wakeup)(tty);
- info->flags &= ~TX_WAKEUP;
-}
-
-/*
- * This function is used to send a high-priority XON/XOFF character to
- * the device
- */
-static void rs_8xx_send_xchar(struct tty_struct *tty, char ch)
-{
- volatile cbd_t *bdp;
-
- ser_info_t *info = (ser_info_t *)tty->driver_data;
-
- if (serial_paranoia_check(info, tty->device, "rs_send_char"))
- return;
-
- bdp = info->tx_cur;
- while (bdp->cbd_sc & BD_SC_READY);
-
- *((char *)__va(bdp->cbd_bufaddr)) = ch;
- bdp->cbd_datlen = 1;
- bdp->cbd_sc |= BD_SC_READY;
-
- /* Get next BD.
- */
- if (bdp->cbd_sc & BD_SC_WRAP)
- bdp = info->tx_bd_base;
- else
- bdp++;
-
- info->tx_cur = (cbd_t *)bdp;
-}
-
-/*
- * ------------------------------------------------------------
- * rs_throttle()
- *
- * This routine is called by the upper-layer tty layer to signal that
- * incoming characters should be throttled.
- * ------------------------------------------------------------
- */
-static void rs_8xx_throttle(struct tty_struct * tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
-#ifdef SERIAL_DEBUG_THROTTLE
- char buf[64];
-
- printk("throttle %s: %d....\n", _tty_name(tty, buf),
- tty->ldisc.chars_in_buffer(tty));
-#endif
-
- if (serial_paranoia_check(info, tty->device, "rs_throttle"))
- return;
-
- if (I_IXOFF(tty))
- rs_8xx_send_xchar(tty, STOP_CHAR(tty));
-
-#ifdef modem_control
- if (tty->termios->c_cflag & CRTSCTS)
- info->MCR &= ~UART_MCR_RTS;
-
- cli();
- serial_out(info, UART_MCR, info->MCR);
- sti();
-#endif
-}
-
-static void rs_8xx_unthrottle(struct tty_struct * tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
-#ifdef SERIAL_DEBUG_THROTTLE
- char buf[64];
-
- printk("unthrottle %s: %d....\n", _tty_name(tty, buf),
- tty->ldisc.chars_in_buffer(tty));
-#endif
-
- if (serial_paranoia_check(info, tty->device, "rs_unthrottle"))
- return;
-
- if (I_IXOFF(tty)) {
- if (info->x_char)
- info->x_char = 0;
- else
- rs_8xx_send_xchar(tty, START_CHAR(tty));
- }
-#ifdef modem_control
- if (tty->termios->c_cflag & CRTSCTS)
- info->MCR |= UART_MCR_RTS;
- cli();
- serial_out(info, UART_MCR, info->MCR);
- sti();
-#endif
-}
-
-/*
- * ------------------------------------------------------------
- * rs_ioctl() and friends
- * ------------------------------------------------------------
- */
-
-#ifdef maybe
-/*
- * get_lsr_info - get line status register info
- *
- * Purpose: Let user call ioctl() to get info when the UART physically
- * is emptied. On bus types like RS485, the transmitter must
- * release the bus after transmitting. This must be done when
- * the transmit shift register is empty, not be done when the
- * transmit holding register is empty. This functionality
- * allows an RS485 driver to be written in user space.
- */
-static int get_lsr_info(struct async_struct * info, unsigned int *value)
-{
- unsigned char status;
- unsigned int result;
-
- cli();
- status = serial_in(info, UART_LSR);
- sti();
- result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
- return put_user(result,value);
-}
-#endif
-
-static int get_modem_info(ser_info_t *info, unsigned int *value)
-{
- unsigned int result = 0;
-#ifdef modem_control
- unsigned char control, status;
-
- control = info->MCR;
- cli();
- status = serial_in(info, UART_MSR);
- sti();
- result = ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
- | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
-#ifdef TIOCM_OUT1
- | ((control & UART_MCR_OUT1) ? TIOCM_OUT1 : 0)
- | ((control & UART_MCR_OUT2) ? TIOCM_OUT2 : 0)
-#endif
- | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
- | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
- | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
- | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
-#endif
- return put_user(result,value);
-}
-
-static int set_modem_info(ser_info_t *info, unsigned int cmd,
- unsigned int *value)
-{
- int error;
- unsigned int arg;
-
- error = get_user(arg, value);
- if (error)
- return error;
-#ifdef modem_control
- switch (cmd) {
- case TIOCMBIS:
- if (arg & TIOCM_RTS)
- info->MCR |= UART_MCR_RTS;
- if (arg & TIOCM_DTR)
- info->MCR |= UART_MCR_DTR;
-#ifdef TIOCM_OUT1
- if (arg & TIOCM_OUT1)
- info->MCR |= UART_MCR_OUT1;
- if (arg & TIOCM_OUT2)
- info->MCR |= UART_MCR_OUT2;
-#endif
- break;
- case TIOCMBIC:
- if (arg & TIOCM_RTS)
- info->MCR &= ~UART_MCR_RTS;
- if (arg & TIOCM_DTR)
- info->MCR &= ~UART_MCR_DTR;
-#ifdef TIOCM_OUT1
- if (arg & TIOCM_OUT1)
- info->MCR &= ~UART_MCR_OUT1;
- if (arg & TIOCM_OUT2)
- info->MCR &= ~UART_MCR_OUT2;
-#endif
- break;
- case TIOCMSET:
- info->MCR = ((info->MCR & ~(UART_MCR_RTS |
-#ifdef TIOCM_OUT1
- UART_MCR_OUT1 |
- UART_MCR_OUT2 |
-#endif
- UART_MCR_DTR))
- | ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0)
-#ifdef TIOCM_OUT1
- | ((arg & TIOCM_OUT1) ? UART_MCR_OUT1 : 0)
- | ((arg & TIOCM_OUT2) ? UART_MCR_OUT2 : 0)
-#endif
- | ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0));
- break;
- default:
- return -EINVAL;
- }
- cli();
- serial_out(info, UART_MCR, info->MCR);
- sti();
-#endif
- return 0;
-}
-
-/* Sending a break is a two step process on the SMC/SCC. It is accomplished
- * by sending a STOP TRANSMIT command followed by a RESTART TRANSMIT
- * command. We take advantage of the begin/end functions to make this
- * happen.
- */
-static void begin_break(ser_info_t *info)
-{
- volatile cpm8260_t *cp;
- uint page, sblock;
- ushort num;
-
- cp = cpmp;
-
- if ((num = info->state->smc_scc_num) < SCC_NUM_BASE) {
- if (num == 0) {
- page = CPM_CR_SMC1_PAGE;
- sblock = CPM_CR_SMC1_SBLOCK;
- }
- else {
- page = CPM_CR_SMC2_PAGE;
- sblock = CPM_CR_SMC2_SBLOCK;
- }
- }
- else {
- num -= SCC_NUM_BASE;
- switch (num) {
- case 0:
- page = CPM_CR_SCC1_PAGE;
- sblock = CPM_CR_SCC1_SBLOCK;
- break;
- case 1:
- page = CPM_CR_SCC2_PAGE;
- sblock = CPM_CR_SCC2_SBLOCK;
- break;
- case 2:
- page = CPM_CR_SCC3_PAGE;
- sblock = CPM_CR_SCC3_SBLOCK;
- break;
- case 3:
- page = CPM_CR_SCC4_PAGE;
- sblock = CPM_CR_SCC4_SBLOCK;
- break;
- default: return;
- }
- }
- cp->cp_cpcr = mk_cr_cmd(page, sblock, 0, CPM_CR_STOP_TX) | CPM_CR_FLG;
- while (cp->cp_cpcr & CPM_CR_FLG);
-}
-
-static void end_break(ser_info_t *info)
-{
- volatile cpm8260_t *cp;
- uint page, sblock;
- ushort num;
-
- cp = cpmp;
-
- if ((num = info->state->smc_scc_num) < SCC_NUM_BASE) {
- if (num == 0) {
- page = CPM_CR_SMC1_PAGE;
- sblock = CPM_CR_SMC1_SBLOCK;
- }
- else {
- page = CPM_CR_SMC2_PAGE;
- sblock = CPM_CR_SMC2_SBLOCK;
- }
- }
- else {
- num -= SCC_NUM_BASE;
- switch (num) {
- case 0:
- page = CPM_CR_SCC1_PAGE;
- sblock = CPM_CR_SCC1_SBLOCK;
- break;
- case 1:
- page = CPM_CR_SCC2_PAGE;
- sblock = CPM_CR_SCC2_SBLOCK;
- break;
- case 2:
- page = CPM_CR_SCC3_PAGE;
- sblock = CPM_CR_SCC3_SBLOCK;
- break;
- case 3:
- page = CPM_CR_SCC4_PAGE;
- sblock = CPM_CR_SCC4_SBLOCK;
- break;
- default: return;
- }
- }
- cp->cp_cpcr = mk_cr_cmd(page, sblock, 0, CPM_CR_RESTART_TX) | CPM_CR_FLG;
- while (cp->cp_cpcr & CPM_CR_FLG);
-}
-
-/*
- * This routine sends a break character out the serial port.
- */
-static void send_break(ser_info_t *info, int duration)
-{
- current->state = TASK_INTERRUPTIBLE;
-#ifdef SERIAL_DEBUG_SEND_BREAK
- printk("rs_send_break(%d) jiff=%lu...", duration, jiffies);
-#endif
- begin_break(info);
- schedule_timeout(duration);
- end_break(info);
-#ifdef SERIAL_DEBUG_SEND_BREAK
- printk("done jiffies=%lu\n", jiffies);
-#endif
-}
-
-
-static int rs_8xx_ioctl(struct tty_struct *tty, struct file * file,
- unsigned int cmd, unsigned long arg)
-{
- int error;
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- int retval;
- struct async_icount cnow; /* kernel counter temps */
- struct serial_icounter_struct *p_cuser; /* user space */
-
- if (serial_paranoia_check(info, tty->device, "rs_ioctl"))
- return -ENODEV;
-
- if ((cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
- return -EIO;
- }
-
- switch (cmd) {
- case TCSBRK: /* SVID version: non-zero arg --> no break */
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- tty_wait_until_sent(tty, 0);
- if (signal_pending(current))
- return -EINTR;
- if (!arg) {
- send_break(info, HZ/4); /* 1/4 second */
- if (signal_pending(current))
- return -EINTR;
- }
- return 0;
- case TCSBRKP: /* support for POSIX tcsendbreak() */
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- tty_wait_until_sent(tty, 0);
- if (signal_pending(current))
- return -EINTR;
- send_break(info, arg ? arg*(HZ/10) : HZ/4);
- if (signal_pending(current))
- return -EINTR;
- return 0;
- case TIOCSBRK:
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- tty_wait_until_sent(tty, 0);
- begin_break(info);
- return 0;
- case TIOCCBRK:
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- end_break(info);
- return 0;
- case TIOCGSOFTCAR:
- return put_user(C_CLOCAL(tty) ? 1 : 0, (int *) arg);
- case TIOCSSOFTCAR:
- error = get_user(arg, (unsigned int *) arg);
- if (error)
- return error;
- tty->termios->c_cflag =
- ((tty->termios->c_cflag & ~CLOCAL) |
- (arg ? CLOCAL : 0));
- return 0;
- case TIOCMGET:
- return get_modem_info(info, (unsigned int *) arg);
- case TIOCMBIS:
- case TIOCMBIC:
- case TIOCMSET:
- return set_modem_info(info, cmd, (unsigned int *) arg);
-#ifdef maybe
- case TIOCSERGETLSR: /* Get line status register */
- return get_lsr_info(info, (unsigned int *) arg);
-#endif
- /*
- * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
- * - mask passed in arg for lines of interest
- * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
- * Caller should use TIOCGICOUNT to see which one it was
- */
- case TIOCMIWAIT:
-#ifdef modem_control
- cli();
- /* note the counters on entry */
- cprev = info->state->icount;
- sti();
- while (1) {
- interruptible_sleep_on(&info->delta_msr_wait);
- /* see if a signal did it */
- if (signal_pending(current))
- return -ERESTARTSYS;
- cli();
- cnow = info->state->icount; /* atomic copy */
- sti();
- if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
- cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
- return -EIO; /* no change => error */
- 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)) ) {
- return 0;
- }
- cprev = cnow;
- }
- /* NOTREACHED */
-#else
- return 0;
-#endif
-
- /*
- * 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.
- */
- case TIOCGICOUNT:
- cli();
- cnow = info->state->icount;
- sti();
- p_cuser = (struct serial_icounter_struct *) arg;
- error = put_user(cnow.cts, &p_cuser->cts);
- if (error) return error;
- error = put_user(cnow.dsr, &p_cuser->dsr);
- if (error) return error;
- error = put_user(cnow.rng, &p_cuser->rng);
- if (error) return error;
- error = put_user(cnow.dcd, &p_cuser->dcd);
- if (error) return error;
- return 0;
-
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
-}
-
-/* FIX UP modem control here someday......
-*/
-static void rs_8xx_set_termios(struct tty_struct *tty, struct termios *old_termios)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
-
- if ( (tty->termios->c_cflag == old_termios->c_cflag)
- && ( RELEVANT_IFLAG(tty->termios->c_iflag)
- == RELEVANT_IFLAG(old_termios->c_iflag)))
- return;
-
- change_speed(info);
-
-#ifdef modem_control
- /* Handle transition to B0 status */
- if ((old_termios->c_cflag & CBAUD) &&
- !(tty->termios->c_cflag & CBAUD)) {
- info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
- cli();
- serial_out(info, UART_MCR, info->MCR);
- sti();
- }
-
- /* Handle transition away from B0 status */
- if (!(old_termios->c_cflag & CBAUD) &&
- (tty->termios->c_cflag & CBAUD)) {
- info->MCR |= UART_MCR_DTR;
- if (!tty->hw_stopped ||
- !(tty->termios->c_cflag & CRTSCTS)) {
- info->MCR |= UART_MCR_RTS;
- }
- cli();
- serial_out(info, UART_MCR, info->MCR);
- sti();
- }
-
- /* Handle turning off CRTSCTS */
- if ((old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- rs_8xx_start(tty);
- }
-#endif
-
-#if 0
- /*
- * No need to wake up processes in open wait, since they
- * sample the CLOCAL flag once, and don't recheck it.
- * XXX It's not clear whether the current behavior is correct
- * or not. Hence, this may change.....
- */
- if (!(old_termios->c_cflag & CLOCAL) &&
- (tty->termios->c_cflag & CLOCAL))
- wake_up_interruptible(&info->open_wait);
-#endif
-}
-
-/*
- * ------------------------------------------------------------
- * rs_close()
- *
- * This routine is called when the serial port gets closed. First, we
- * wait for the last remaining data to be sent. Then, we unlink its
- * async structure from the interrupt chain if necessary, and we free
- * that IRQ if nothing is left in the chain.
- * ------------------------------------------------------------
- */
-static void rs_8xx_close(struct tty_struct *tty, struct file * filp)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- struct serial_state *state;
- unsigned long flags;
- int idx;
- volatile smc_t *smcp;
- volatile scc_t *sccp;
-
- if (!info || serial_paranoia_check(info, tty->device, "rs_close"))
- return;
-
- state = info->state;
-
- save_flags(flags); cli();
-
- if (tty_hung_up_p(filp)) {
- DBG_CNT("before DEC-hung");
- MOD_DEC_USE_COUNT;
- restore_flags(flags);
- return;
- }
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_close ttys%d, count = %d\n", info->line, state->count);
-#endif
- if ((tty->count == 1) && (state->count != 1)) {
- /*
- * Uh, oh. tty->count is 1, which means that the tty
- * structure will be freed. state->count should always
- * be one in these conditions. If it's greater than
- * one, we've got real problems, since it means the
- * serial port won't be shutdown.
- */
- printk("rs_close: bad serial port count; tty->count is 1, "
- "state->count is %d\n", state->count);
- state->count = 1;
- }
- if (--state->count < 0) {
- printk("rs_close: bad serial port count for ttys%d: %d\n",
- info->line, state->count);
- state->count = 0;
- }
- if (state->count) {
- DBG_CNT("before DEC-2");
- MOD_DEC_USE_COUNT;
- restore_flags(flags);
- return;
- }
- info->flags |= ASYNC_CLOSING;
- /*
- * Save the termios structure, since this port may have
- * separate termios for callout and dialin.
- */
- if (info->flags & ASYNC_NORMAL_ACTIVE)
- info->state->normal_termios = *tty->termios;
- if (info->flags & ASYNC_CALLOUT_ACTIVE)
- info->state->callout_termios = *tty->termios;
- /*
- * Now we wait for the transmit buffer to clear; and we notify
- * the line discipline to only process XON/XOFF characters.
- */
- tty->closing = 1;
- if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
- tty_wait_until_sent(tty, info->closing_wait);
- /*
- * At this point we stop accepting input. To do this, we
- * disable the receive line status interrupts, and tell the
- * interrupt driver to stop checking the data ready bit in the
- * line status register.
- */
- info->read_status_mask &= ~BD_SC_EMPTY;
- if (info->flags & ASYNC_INITIALIZED) {
- if ((idx = info->state->smc_scc_num) < SCC_NUM_BASE) {
- smcp = &immr->im_smc[idx];
- smcp->smc_smcm &= ~SMCM_RX;
- smcp->smc_smcmr &= ~SMCMR_REN;
- }
- else {
- sccp = &immr->im_scc[idx - SCC_IDX_BASE];
- sccp->scc_sccm &= ~UART_SCCM_RX;
- sccp->scc_gsmrl &= ~SCC_GSMRL_ENR;
- }
- /*
- * Before we drop DTR, make sure the UART transmitter
- * has completely drained; this is especially
- * important if there is a transmit FIFO!
- */
- rs_8xx_wait_until_sent(tty, info->timeout);
- }
- shutdown(info);
- if (tty->driver.flush_buffer)
- tty->driver.flush_buffer(tty);
- if (tty->ldisc.flush_buffer)
- tty->ldisc.flush_buffer(tty);
- tty->closing = 0;
- info->event = 0;
- info->tty = 0;
- if (info->blocked_open) {
- if (info->close_delay) {
- current->state = TASK_INTERRUPTIBLE;
- schedule_timeout(info->close_delay);
- }
- wake_up_interruptible(&info->open_wait);
- }
- info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE|
- ASYNC_CLOSING);
- wake_up_interruptible(&info->close_wait);
- MOD_DEC_USE_COUNT;
- restore_flags(flags);
-}
-
-/*
- * rs_wait_until_sent() --- wait until the transmitter is empty
- */
-static void rs_8xx_wait_until_sent(struct tty_struct *tty, int timeout)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- unsigned long orig_jiffies, char_time;
- /*int lsr;*/
- volatile cbd_t *bdp;
-
- if (serial_paranoia_check(info, tty->device, "rs_wait_until_sent"))
- return;
-
-#ifdef maybe
- if (info->state->type == PORT_UNKNOWN)
- return;
-#endif
-
- orig_jiffies = jiffies;
- /*
- * Set the check interval to be 1/5 of the estimated time to
- * send a single character, and make it at least 1. The check
- * interval should also be less than the timeout.
- *
- * Note: we have to use pretty tight timings here to satisfy
- * the NIST-PCTS.
- */
- char_time = 1;
- if (timeout)
- char_time = MIN(char_time, timeout);
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
- printk("In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
- printk("jiff=%lu...", jiffies);
-#endif
-
- /* We go through the loop at least once because we can't tell
- * exactly when the last character exits the shifter. There can
- * be at least two characters waiting to be sent after the buffers
- * are empty.
- */
- do {
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
- printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
-#endif
- current->state = TASK_INTERRUPTIBLE;
-/* current->counter = 0; make us low-priority */
- schedule_timeout(char_time);
- if (signal_pending(current))
- break;
- if (timeout && time_after(jiffies, orig_jiffies + timeout))
- break;
- bdp = info->tx_cur;
- } while (bdp->cbd_sc & BD_SC_READY);
- current->state = TASK_RUNNING;
-#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
- printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
-#endif
-}
-
-/*
- * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
- */
-static void rs_8xx_hangup(struct tty_struct *tty)
-{
- ser_info_t *info = (ser_info_t *)tty->driver_data;
- struct serial_state *state = info->state;
-
- if (serial_paranoia_check(info, tty->device, "rs_hangup"))
- return;
-
- state = info->state;
-
- rs_8xx_flush_buffer(tty);
- shutdown(info);
- info->event = 0;
- state->count = 0;
- info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE);
- info->tty = 0;
- wake_up_interruptible(&info->open_wait);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_open() and friends
- * ------------------------------------------------------------
- */
-static int block_til_ready(struct tty_struct *tty, struct file * filp,
- ser_info_t *info)
-{
-#ifdef DO_THIS_LATER
- DECLARE_WAITQUEUE(wait, current);
-#endif
- struct serial_state *state = info->state;
- int retval;
- int do_clocal = 0;
-
- /*
- * If the device is in the middle of being closed, then block
- * until it's done, and then try again.
- */
- if (tty_hung_up_p(filp) ||
- (info->flags & ASYNC_CLOSING)) {
- if (info->flags & ASYNC_CLOSING)
- interruptible_sleep_on(&info->close_wait);
-#ifdef SERIAL_DO_RESTART
- if (info->flags & ASYNC_HUP_NOTIFY)
- return -EAGAIN;
- else
- return -ERESTARTSYS;
-#else
- return -EAGAIN;
-#endif
- }
-
- /*
- * If this is a callout device, then just make sure the normal
- * device isn't being used.
- */
- if (tty->driver.subtype == SERIAL_TYPE_CALLOUT) {
- if (info->flags & ASYNC_NORMAL_ACTIVE)
- return -EBUSY;
- if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
- (info->flags & ASYNC_SESSION_LOCKOUT) &&
- (info->session != current->session))
- return -EBUSY;
- if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
- (info->flags & ASYNC_PGRP_LOCKOUT) &&
- (info->pgrp != current->pgrp))
- return -EBUSY;
- info->flags |= ASYNC_CALLOUT_ACTIVE;
- return 0;
- }
-
- /*
- * If non-blocking mode is set, or the port is not enabled,
- * then make the check up front and then exit.
- * If this is an SMC port, we don't have modem control to wait
- * for, so just get out here.
- */
- if ((filp->f_flags & O_NONBLOCK) ||
- (tty->flags & (1 << TTY_IO_ERROR)) ||
- (info->state->smc_scc_num < SCC_NUM_BASE)) {
- if (info->flags & ASYNC_CALLOUT_ACTIVE)
- return -EBUSY;
- info->flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
- }
-
- if (info->flags & ASYNC_CALLOUT_ACTIVE) {
- if (state->normal_termios.c_cflag & CLOCAL)
- do_clocal = 1;
- } else {
- if (tty->termios->c_cflag & CLOCAL)
- do_clocal = 1;
- }
-
- /*
- * Block waiting for the carrier detect and the line to become
- * free (i.e., not in use by the callout). While we are in
- * this loop, state->count is dropped by one, so that
- * rs_close() knows when to free things. We restore it upon
- * exit, either normal or abnormal.
- */
- retval = 0;
-#ifdef DO_THIS_LATER
- add_wait_queue(&info->open_wait, &wait);
-#ifdef SERIAL_DEBUG_OPEN
- printk("block_til_ready before block: ttys%d, count = %d\n",
- state->line, state->count);
-#endif
- cli();
- if (!tty_hung_up_p(filp))
- state->count--;
- sti();
- info->blocked_open++;
- while (1) {
- cli();
- if (!(info->flags & ASYNC_CALLOUT_ACTIVE) &&
- (tty->termios->c_cflag & CBAUD))
- serial_out(info, UART_MCR,
- serial_inp(info, UART_MCR) |
- (UART_MCR_DTR | UART_MCR_RTS));
- sti();
- set_current_state(TASK_INTERRUPTIBLE);
- if (tty_hung_up_p(filp) ||
- !(info->flags & ASYNC_INITIALIZED)) {
-#ifdef SERIAL_DO_RESTART
- if (info->flags & ASYNC_HUP_NOTIFY)
- retval = -EAGAIN;
- else
- retval = -ERESTARTSYS;
-#else
- retval = -EAGAIN;
-#endif
- break;
- }
- if (!(info->flags & ASYNC_CALLOUT_ACTIVE) &&
- !(info->flags & ASYNC_CLOSING) &&
- (do_clocal || (serial_in(info, UART_MSR) &
- UART_MSR_DCD)))
- break;
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- break;
- }
-#ifdef SERIAL_DEBUG_OPEN
- printk("block_til_ready blocking: ttys%d, count = %d\n",
- info->line, state->count);
-#endif
- schedule();
- }
- current->state = TASK_RUNNING;
- remove_wait_queue(&info->open_wait, &wait);
- if (!tty_hung_up_p(filp))
- state->count++;
- info->blocked_open--;
-#ifdef SERIAL_DEBUG_OPEN
- printk("block_til_ready after blocking: ttys%d, count = %d\n",
- info->line, state->count);
-#endif
-#endif /* DO_THIS_LATER */
- if (retval)
- return retval;
- info->flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
-}
-
-static int get_async_struct(int line, ser_info_t **ret_info)
-{
- struct serial_state *sstate;
-
- sstate = rs_table + line;
- if (sstate->info) {
- sstate->count++;
- *ret_info = (ser_info_t *)sstate->info;
- return 0;
- }
- else {
- return -ENOMEM;
- }
-}
-
-/*
- * This routine is called whenever a serial port is opened. It
- * enables interrupts for a serial port, linking in its async structure into
- * the IRQ chain. It also performs the serial-specific
- * initialization for the tty structure.
- */
-static int rs_8xx_open(struct tty_struct *tty, struct file * filp)
-{
- ser_info_t *info;
- int retval, line;
-
- line = MINOR(tty->device) - tty->driver.minor_start;
- if ((line < 0) || (line >= NR_PORTS))
- return -ENODEV;
- retval = get_async_struct(line, &info);
- if (retval)
- return retval;
- if (serial_paranoia_check(info, tty->device, "rs_open"))
- return -ENODEV;
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_open %s%d, count = %d\n", tty->driver.name, info->line,
- info->state->count);
-#endif
- tty->driver_data = info;
- info->tty = tty;
-
- /*
- * Start up serial port
- */
- retval = startup(info);
- if (retval)
- return retval;
-
- MOD_INC_USE_COUNT;
- retval = block_til_ready(tty, filp, info);
- if (retval) {
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_open returning after block_til_ready with %d\n",
- retval);
-#endif
- return retval;
- }
-
- if ((info->state->count == 1) &&
- (info->flags & ASYNC_SPLIT_TERMIOS)) {
- if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
- *tty->termios = info->state->normal_termios;
- else
- *tty->termios = info->state->callout_termios;
- change_speed(info);
- }
-
- info->session = current->session;
- info->pgrp = current->pgrp;
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_open ttys%d successful...", info->line);
-#endif
- return 0;
-}
-
-/*
- * /proc fs routines....
- */
-
-static int inline line_info(char *buf, struct serial_state *state)
-{
-#ifdef notdef
- struct async_struct *info = state->info, scr_info;
- char stat_buf[30], control, status;
-#endif
- int ret;
-
- ret = sprintf(buf, "%d: uart:%s port:%X irq:%d",
- state->line,
- (state->smc_scc_num < SCC_NUM_BASE) ? "SMC" : "SCC",
- state->port, state->irq);
-
- if (!state->port || (state->type == PORT_UNKNOWN)) {
- ret += sprintf(buf+ret, "\n");
- return ret;
- }
-
-#ifdef notdef
- /*
- * Figure out the current RS-232 lines
- */
- if (!info) {
- info = &scr_info; /* This is just for serial_{in,out} */
-
- info->magic = SERIAL_MAGIC;
- info->port = state->port;
- info->flags = state->flags;
- info->quot = 0;
- info->tty = 0;
- }
- cli();
- status = serial_in(info, UART_MSR);
- control = info ? info->MCR : serial_in(info, UART_MCR);
- sti();
-
- stat_buf[0] = 0;
- stat_buf[1] = 0;
- if (control & UART_MCR_RTS)
- strcat(stat_buf, "|RTS");
- if (status & UART_MSR_CTS)
- strcat(stat_buf, "|CTS");
- if (control & UART_MCR_DTR)
- strcat(stat_buf, "|DTR");
- if (status & UART_MSR_DSR)
- strcat(stat_buf, "|DSR");
- if (status & UART_MSR_DCD)
- strcat(stat_buf, "|CD");
- if (status & UART_MSR_RI)
- strcat(stat_buf, "|RI");
-
- if (info->quot) {
- ret += sprintf(buf+ret, " baud:%d",
- state->baud_base / info->quot);
- }
-
- ret += sprintf(buf+ret, " tx:%d rx:%d",
- state->icount.tx, state->icount.rx);
-
- if (state->icount.frame)
- ret += sprintf(buf+ret, " fe:%d", state->icount.frame);
-
- if (state->icount.parity)
- ret += sprintf(buf+ret, " pe:%d", state->icount.parity);
-
- if (state->icount.brk)
- ret += sprintf(buf+ret, " brk:%d", state->icount.brk);
-
- if (state->icount.overrun)
- ret += sprintf(buf+ret, " oe:%d", state->icount.overrun);
-
- /*
- * Last thing is the RS-232 status lines
- */
- ret += sprintf(buf+ret, " %s\n", stat_buf+1);
-#endif
- return ret;
-}
-
-int rs_8xx_read_proc(char *page, char **start, off_t off, int count,
- int *eof, void *data)
-{
- int i, len = 0;
- off_t begin = 0;
-
- len += sprintf(page, "serinfo:1.0 driver:%s\n", serial_version);
- for (i = 0; i < NR_PORTS && len < 4000; i++) {
- len += line_info(page + len, &rs_table[i]);
- if (len+begin > off+count)
- goto done;
- if (len+begin < off) {
- begin += len;
- len = 0;
- }
- }
- *eof = 1;
-done:
- if (off >= len+begin)
- return 0;
- *start = page + (begin-off);
- return ((count < begin+len-off) ? count : begin+len-off);
-}
-
-/*
- * ---------------------------------------------------------------------
- * rs_init() and friends
- *
- * rs_init() is called at boot-time to initialize the serial driver.
- * ---------------------------------------------------------------------
- */
-
-/*
- * This routine prints out the appropriate serial driver version
- * number, and identifies which options were configured into this
- * driver.
- */
-static _INLINE_ void show_serial_version(void)
-{
- printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
-}
-
-
-/*
- * The serial console driver used during boot. Note that these names
- * clash with those found in "serial.c", so we currently can't support
- * the 16xxx uarts and these at the same time. I will fix this to become
- * an indirect function call from tty_io.c (or something).
- */
-
-#ifdef CONFIG_SERIAL_CONSOLE
-
-/*
- * Print a string to the serial port trying not to disturb any possible
- * real use of the port...
- */
-static void serial_console_write(struct console *c, const char *s,
- unsigned count)
-{
- struct serial_state *ser;
- ser_info_t *info;
- unsigned i;
- volatile cbd_t *bdp, *bdbase;
- volatile smc_uart_t *up;
- volatile u_char *cp;
-
- ser = rs_table + c->index;
-
- /* If the port has been initialized for general use, we have
- * to use the buffer descriptors allocated there. Otherwise,
- * we simply use the single buffer allocated.
- */
- if ((info = (ser_info_t *)ser->info) != NULL) {
- bdp = info->tx_cur;
- bdbase = info->tx_bd_base;
- }
- else {
- /* Pointer to UART in parameter ram.
- */
- up = (smc_uart_t *)&immr->im_dprambase[ser->port];
-
- /* Get the address of the host memory buffer.
- */
- bdp = bdbase = (cbd_t *)&immr->im_dprambase[up->smc_tbase];
- }
-
- /*
- * We need to gracefully shut down the transmitter, disable
- * interrupts, then send our bytes out.
- */
-
- /*
- * Now, do each character. This is not as bad as it looks
- * since this is a holding FIFO and not a transmitting FIFO.
- * We could add the complexity of filling the entire transmit
- * buffer, but we would just wait longer between accesses......
- */
- for (i = 0; i < count; i++, s++) {
- /* Wait for transmitter fifo to empty.
- * Ready indicates output is ready, and xmt is doing
- * that, not that it is ready for us to send.
- */
- while (bdp->cbd_sc & BD_SC_READY);
- /* Send the character out. */
- cp = __va(bdp->cbd_bufaddr);
- *cp = *s;
-
- bdp->cbd_datlen = 1;
- bdp->cbd_sc |= BD_SC_READY;
-
- if (bdp->cbd_sc & BD_SC_WRAP)
- bdp = bdbase;
- else
- bdp++;
-
- /* if a LF, also do CR... */
- if (*s == 10) {
- while (bdp->cbd_sc & BD_SC_READY);
- cp = __va(bdp->cbd_bufaddr);
- *cp = 13;
- bdp->cbd_datlen = 1;
- bdp->cbd_sc |= BD_SC_READY;
-
- if (bdp->cbd_sc & BD_SC_WRAP) {
- bdp = bdbase;
- }
- else {
- bdp++;
- }
- }
- }
-
- /*
- * Finally, Wait for transmitter & holding register to empty
- * and restore the IER
- */
- while (bdp->cbd_sc & BD_SC_READY);
-
- if (info)
- info->tx_cur = (cbd_t *)bdp;
-}
-
-static kdev_t serial_console_device(struct console *c)
-{
- return MKDEV(TTYAUX_MAJOR, 64 + c->index);
-}
-
-/*
- * Register console.
- */
-long __init console_8xx_init(long kmem_start, long kmem_end)
-{
- register_console(&sercons);
- return kmem_start;
-}
-
-#endif
-
-/* Default console baud rate as determined by the board information
- * structure.
- */
-static int baud_idx;
-
-/*
- * The serial driver boot-time initialization code!
- */
-int __init rs_8xx_init(void)
-{
- struct serial_state * state;
- ser_info_t *info;
- uint mem_addr, dp_addr;
- int i, j, idx;
- uint page, sblock;
- volatile cbd_t *bdp;
- volatile cpm8260_t *cp;
- volatile smc_t *sp;
- volatile smc_uart_t *up;
- volatile scc_t *scp;
- volatile scc_uart_t *sup;
- volatile immap_t *immap;
- volatile iop8260_t *io;
-
- init_bh(SERIAL_BH, do_serial_bh);
-
- show_serial_version();
-
- /* Initialize the tty_driver structure */
-
- /*memset(&serial_driver, 0, sizeof(struct tty_driver));*/
- __clear_user(&serial_driver,sizeof(struct tty_driver));
- serial_driver.magic = TTY_DRIVER_MAGIC;
- serial_driver.driver_name = "serial";
-#ifdef CONFIG_DEVFS_FS
- serial_driver.name = "tts/%d";
-#else
- serial_driver.name = "ttyS";
-#endif
- serial_driver.major = TTY_MAJOR;
- serial_driver.minor_start = 64;
- serial_driver.num = NR_PORTS;
- 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 =
- baud_idx | CS8 | CREAD | HUPCL | CLOCAL;
- serial_driver.flags = TTY_DRIVER_REAL_RAW;
- serial_driver.refcount = &serial_refcount;
- serial_driver.table = serial_table;
- serial_driver.termios = serial_termios;
- serial_driver.termios_locked = serial_termios_locked;
-
- serial_driver.open = rs_8xx_open;
- serial_driver.close = rs_8xx_close;
- serial_driver.write = rs_8xx_write;
- serial_driver.put_char = rs_8xx_put_char;
- serial_driver.write_room = rs_8xx_write_room;
- serial_driver.chars_in_buffer = rs_8xx_chars_in_buffer;
- serial_driver.flush_buffer = rs_8xx_flush_buffer;
- serial_driver.ioctl = rs_8xx_ioctl;
- serial_driver.throttle = rs_8xx_throttle;
- serial_driver.unthrottle = rs_8xx_unthrottle;
- serial_driver.send_xchar = rs_8xx_send_xchar;
- serial_driver.set_termios = rs_8xx_set_termios;
- serial_driver.stop = rs_8xx_stop;
- serial_driver.start = rs_8xx_start;
- serial_driver.hangup = rs_8xx_hangup;
- serial_driver.wait_until_sent = rs_8xx_wait_until_sent;
- serial_driver.read_proc = rs_8xx_read_proc;
-
- /*
- * The callout device is just like normal device except for
- * major number and the subtype code.
- */
- callout_driver = serial_driver;
-#ifdef CONFIG_DEVFS_FS
- callout_driver.name = "cua/%d";
-#else
- callout_driver.name = "cua";
-#endif
- callout_driver.major = TTYAUX_MAJOR;
- callout_driver.subtype = SERIAL_TYPE_CALLOUT;
- callout_driver.read_proc = 0;
- callout_driver.proc_entry = 0;
-
- if (tty_register_driver(&serial_driver))
- panic("Couldn't register serial driver\n");
- if (tty_register_driver(&callout_driver))
- panic("Couldn't register callout driver\n");
-
- immap = immr;
- cp = &immap->im_cpm;
- io = &immap->im_ioport;
-
- /* This should have been done long ago by the early boot code,
- * but do it again to make sure.
- */
- *(ushort *)(&immap->im_dprambase[PROFF_SMC1_BASE]) = PROFF_SMC1;
- *(ushort *)(&immap->im_dprambase[PROFF_SMC2_BASE]) = PROFF_SMC2;
-
- /* Geeze, here we go....Picking I/O port bits....Lots of
- * choices. If you don't like mine, pick your own.
- * Configure SMCs Tx/Rx. SMC1 is only on Port D, SMC2 is
- * only on Port A. You either pick 'em, or not.
- */
- io->iop_ppard |= 0x00c00000;
- io->iop_pdird |= 0x00400000;
- io->iop_pdird &= ~0x00800000;
- io->iop_psord &= ~0x00c00000;
-#if USE_SMC2
- io->iop_ppara |= 0x00c00000;
- io->iop_pdira |= 0x00400000;
- io->iop_pdira &= ~0x00800000;
- io->iop_psora &= ~0x00c00000;
-#endif
-
- /* Configure SCC2 and SCC3. Be careful about the fine print.
- * Secondary options are only available when you take away
- * the primary option. Unless the pins are used for something
- * else, SCC2 and SCC3 are on Port B.
- * Port B, 8 - SCC3 TxD
- * Port B, 12 - SCC2 TxD
- * Port B, 14 - SCC3 RxD
- * Port B, 15 - SCC2 RxD
- */
- io->iop_pparb |= 0x008b0000;
- io->iop_pdirb |= 0x00880000;
- io->iop_psorb |= 0x00880000;
- io->iop_pdirb &= ~0x00030000;
- io->iop_psorb &= ~0x00030000;
-
- /* Wire BRG1 to SMC1 and BRG2 to SMC2.
- */
- immap->im_cpmux.cmx_smr = 0;
-
- /* Connect SCC2 and SCC3 to NMSI. Connect BRG3 to SCC2 and
- * BRG4 to SCC3.
- */
- immap->im_cpmux.cmx_scr &= ~0x00ffff00;
- immap->im_cpmux.cmx_scr |= 0x00121b00;
-
- for (i = 0, state = rs_table; i < NR_PORTS; i++,state++) {
- state->magic = SSTATE_MAGIC;
- state->line = i;
- state->type = PORT_UNKNOWN;
- state->custom_divisor = 0;
- state->close_delay = 5*HZ/10;
- state->closing_wait = 30*HZ;
- state->callout_termios = callout_driver.init_termios;
- state->normal_termios = serial_driver.init_termios;
- state->icount.cts = state->icount.dsr =
- state->icount.rng = state->icount.dcd = 0;
- state->icount.rx = state->icount.tx = 0;
- state->icount.frame = state->icount.parity = 0;
- state->icount.overrun = state->icount.brk = 0;
- printk(KERN_INFO "ttyS%02d at 0x%04x is a %s\n",
- i, state->port,
- (state->smc_scc_num < SCC_NUM_BASE) ? "SMC" : "SCC");
-#ifdef CONFIG_SERIAL_CONSOLE
- /* If we just printed the message on the console port, and
- * we are about to initialize it for general use, we have
- * to wait a couple of character times for the CR/NL to
- * make it out of the transmit buffer.
- */
- if (i == CONFIG_SERIAL_CONSOLE_PORT)
- mdelay(2);
-#endif
- info = kmalloc(sizeof(ser_info_t), GFP_KERNEL);
- if (info) {
- /*memset(info, 0, sizeof(ser_info_t));*/
- __clear_user(info,sizeof(ser_info_t));
- init_waitqueue_head(&info->open_wait);
- init_waitqueue_head(&info->close_wait);
- info->magic = SERIAL_MAGIC;
- info->flags = state->flags;
- info->tqueue.routine = do_softint;
- info->tqueue.data = info;
- info->tqueue_hangup.routine = do_serial_hangup;
- info->tqueue_hangup.data = info;
- info->line = i;
- info->state = state;
- state->info = (struct async_struct *)info;
-
- /* We need to allocate a transmit and receive buffer
- * descriptors from dual port ram, and a character
- * buffer area from host mem.
- */
- dp_addr = m8260_cpm_dpalloc(sizeof(cbd_t) * RX_NUM_FIFO, 8);
-
- /* Allocate space for FIFOs in the host memory.
- */
- mem_addr = m8260_cpm_hostalloc(RX_NUM_FIFO * RX_BUF_SIZE, 1);
-
- /* Set the physical address of the host memory
- * buffers in the buffer descriptors, and the
- * virtual address for us to work with.
- */
- bdp = (cbd_t *)&immap->im_dprambase[dp_addr];
- info->rx_cur = info->rx_bd_base = (cbd_t *)bdp;
-
- for (j=0; j<(RX_NUM_FIFO-1); j++) {
- bdp->cbd_bufaddr = __pa(mem_addr);
- bdp->cbd_sc = BD_SC_EMPTY | BD_SC_INTRPT;
- mem_addr += RX_BUF_SIZE;
- bdp++;
- }
- bdp->cbd_bufaddr = __pa(mem_addr);
- bdp->cbd_sc = BD_SC_WRAP | BD_SC_EMPTY | BD_SC_INTRPT;
-
- if ((idx = state->smc_scc_num) < SCC_NUM_BASE) {
- sp = &immap->im_smc[idx];
- up = (smc_uart_t *)&immap->im_dprambase[state->port];
- up->smc_rbase = dp_addr;
- }
- else {
- scp = &immap->im_scc[idx - SCC_IDX_BASE];
- sup = (scc_uart_t *)&immap->im_dprambase[state->port];
- sup->scc_genscc.scc_rbase = dp_addr;
- }
-
- dp_addr = m8260_cpm_dpalloc(sizeof(cbd_t) * TX_NUM_FIFO, 8);
-
- /* Allocate space for FIFOs in the host memory.
- */
- mem_addr = m8260_cpm_hostalloc(TX_NUM_FIFO * TX_BUF_SIZE, 1);
-
- /* Set the physical address of the host memory
- * buffers in the buffer descriptors, and the
- * virtual address for us to work with.
- */
- bdp = (cbd_t *)&immap->im_dprambase[dp_addr];
- info->tx_cur = info->tx_bd_base = (cbd_t *)bdp;
-
- for (j=0; j<(TX_NUM_FIFO-1); j++) {
- bdp->cbd_bufaddr = __pa(mem_addr);
- bdp->cbd_sc = BD_SC_INTRPT;
- mem_addr += TX_BUF_SIZE;
- bdp++;
- }
- bdp->cbd_bufaddr = __pa(mem_addr);
- bdp->cbd_sc = (BD_SC_WRAP | BD_SC_INTRPT);
-
- if (idx < SCC_NUM_BASE) {
- up->smc_tbase = dp_addr;
-
- /* Set up the uart parameters in the
- * parameter ram.
- */
- up->smc_rfcr = CPMFCR_GBL | CPMFCR_EB;
- up->smc_tfcr = CPMFCR_GBL | CPMFCR_EB;
-
- /* Set this to 1 for now, so we get single
- * character interrupts. Using idle charater
- * time requires some additional tuning.
- */
- up->smc_mrblr = 1;
- up->smc_maxidl = 0;
- up->smc_brkcr = 1;
-
- /* Send the CPM an initialize command.
- */
- if (state->smc_scc_num == 0) {
- page = CPM_CR_SMC1_PAGE;
- sblock = CPM_CR_SMC1_SBLOCK;
- }
- else {
- page = CPM_CR_SMC2_PAGE;
- sblock = CPM_CR_SMC2_SBLOCK;
- }
-
- cp->cp_cpcr = mk_cr_cmd(page, sblock, 0,
- CPM_CR_INIT_TRX) | CPM_CR_FLG;
- while (cp->cp_cpcr & CPM_CR_FLG);
-
- /* Set UART mode, 8 bit, no parity, one stop.
- * Enable receive and transmit.
- */
- sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART;
-
- /* Disable all interrupts and clear all pending
- * events.
- */
- sp->smc_smcm = 0;
- sp->smc_smce = 0xff;
- }
- else {
- sup->scc_genscc.scc_tbase = dp_addr;
-
- /* Set up the uart parameters in the
- * parameter ram.
- */
- sup->scc_genscc.scc_rfcr = CPMFCR_GBL | CPMFCR_EB;
- sup->scc_genscc.scc_tfcr = CPMFCR_GBL | CPMFCR_EB;
-
- /* Set this to 1 for now, so we get single
- * character interrupts. Using idle charater
- * time requires some additional tuning.
- */
- sup->scc_genscc.scc_mrblr = 1;
- sup->scc_maxidl = 0;
- sup->scc_brkcr = 1;
- sup->scc_parec = 0;
- sup->scc_frmec = 0;
- sup->scc_nosec = 0;
- sup->scc_brkec = 0;
- sup->scc_uaddr1 = 0;
- sup->scc_uaddr2 = 0;
- sup->scc_toseq = 0;
- sup->scc_char1 = 0x8000;
- sup->scc_char2 = 0x8000;
- sup->scc_char3 = 0x8000;
- sup->scc_char4 = 0x8000;
- sup->scc_char5 = 0x8000;
- sup->scc_char6 = 0x8000;
- sup->scc_char7 = 0x8000;
- sup->scc_char8 = 0x8000;
- sup->scc_rccm = 0xc0ff;
-
- /* Send the CPM an initialize command.
- */
- if (state->smc_scc_num == 2) {
- page = CPM_CR_SCC2_PAGE;
- sblock = CPM_CR_SCC2_SBLOCK;
- }
- else {
- page = CPM_CR_SCC3_PAGE;
- sblock = CPM_CR_SCC3_SBLOCK;
- }
-
- cp->cp_cpcr = mk_cr_cmd(page, sblock, 0,
- CPM_CR_INIT_TRX) | CPM_CR_FLG;
- while (cp->cp_cpcr & CPM_CR_FLG);
-
- /* Set UART mode, 8 bit, no parity, one stop.
- * Enable receive and transmit.
- */
- scp->scc_gsmrh = 0;
- scp->scc_gsmrl =
- (SCC_GSMRL_MODE_UART | SCC_GSMRL_TDCR_16 | SCC_GSMRL_RDCR_16);
-
- /* Disable all interrupts and clear all pending
- * events.
- */
- scp->scc_sccm = 0;
- scp->scc_scce = 0xffff;
- scp->scc_dsr = 0x7e7e;
- scp->scc_pmsr = 0x3000;
- }
-
- /* Install interrupt handler.
- */
- request_irq(state->irq, rs_8xx_interrupt, 0, "uart",
- info);
-
- /* Set up the baud rate generator.
- */
- m8260_cpm_setbrg(state->smc_scc_num,
- baud_table[baud_idx]);
-
- /* If the port is the console, enable Rx and Tx.
- */
-#ifdef CONFIG_SERIAL_CONSOLE
- if (i == CONFIG_SERIAL_CONSOLE_PORT)
- sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN;
-#endif
- }
- }
- return 0;
-}
-
-/* This must always be called before the rs_8xx_init() function, otherwise
- * it blows away the port control information.
-*/
-static int __init serial_console_setup(struct console *co, char *options)
-{
- struct serial_state *ser;
- uint mem_addr, dp_addr, bidx;
- volatile cbd_t *bdp;
- volatile cpm8260_t *cp;
- volatile immap_t *immap;
- volatile smc_t *sp;
- volatile smc_uart_t *up;
- volatile iop8260_t *io;
- bd_t *bd;
-
- bd = (bd_t *)__res;
-
- for (bidx = 0; bidx < (sizeof(baud_table) / sizeof(int)); bidx++)
- if (bd->bi_baudrate == baud_table[bidx])
- break;
-
- co->cflag = CREAD|CLOCAL|bidx|CS8;
- baud_idx = bidx;
-
- ser = rs_table + co->index;
-
-
- immap = immr;
- cp = &immap->im_cpm;
- io = &immap->im_ioport;
-
- /* This should have been done long ago by the early boot code,
- * but do it again to make sure.
- */
- *(ushort *)(&immap->im_dprambase[PROFF_SMC1_BASE]) = PROFF_SMC1;
- *(ushort *)(&immap->im_dprambase[PROFF_SMC2_BASE]) = PROFF_SMC2;
-
- /* Right now, assume we are using SMCs.
- */
- sp = &immap->im_smc[ser->smc_scc_num];
-
- /* When we get here, the CPM has been reset, so we need
- * to configure the port.
- * We need to allocate a transmit and receive buffer descriptor
- * from dual port ram, and a character buffer area from host mem.
- */
- up = (smc_uart_t *)&immap->im_dprambase[ser->port];
-
- /* Disable transmitter/receiver.
- */
- sp->smc_smcmr &= ~(SMCMR_REN | SMCMR_TEN);
-
- /* Use Port D for SMC1 instead of other functions.
- */
- io->iop_ppard |= 0x00c00000;
- io->iop_pdird |= 0x00400000;
- io->iop_pdird &= ~0x00800000;
- io->iop_psord &= ~0x00c00000;
-
- /* Allocate space for two buffer descriptors in the DP ram.
- */
- dp_addr = m8260_cpm_dpalloc(sizeof(cbd_t) * 2, 8);
-
- /* Allocate space for two 2 byte FIFOs in the host memory.
- */
- mem_addr = m8260_cpm_hostalloc(4, 1);
-
- /* Set the physical address of the host memory buffers in
- * the buffer descriptors.
- */
- bdp = (cbd_t *)&immap->im_dprambase[dp_addr];
- bdp->cbd_bufaddr = __pa(mem_addr);
- (bdp+1)->cbd_bufaddr = __pa(mem_addr+2);
-
- /* For the receive, set empty and wrap.
- * For transmit, set wrap.
- */
- bdp->cbd_sc = BD_SC_EMPTY | BD_SC_WRAP;
- (bdp+1)->cbd_sc = BD_SC_WRAP;
-
- /* Set up the uart parameters in the parameter ram.
- */
- up->smc_rbase = dp_addr; /* Base of receive buffer desc. */
- up->smc_tbase = dp_addr+sizeof(cbd_t); /* Base of xmt buffer desc. */
- up->smc_rfcr = CPMFCR_GBL | CPMFCR_EB;
- up->smc_tfcr = CPMFCR_GBL | CPMFCR_EB;
-
- /* Set this to 1 for now, so we get single character interrupts.
- */
- up->smc_mrblr = 1; /* receive buffer length */
- up->smc_maxidl = 0; /* wait forever for next char */
-
- /* Send the CPM an initialize command.
- */
- cp->cp_cpcr = mk_cr_cmd(CPM_CR_SMC1_PAGE, CPM_CR_SMC1_SBLOCK, 0,
- CPM_CR_INIT_TRX) | CPM_CR_FLG;
- while (cp->cp_cpcr & CPM_CR_FLG);
-
- /* Set UART mode, 8 bit, no parity, one stop.
- * Enable receive and transmit.
- */
- sp->smc_smcmr = smcr_mk_clen(9) | SMCMR_SM_UART;
-
- /* Set up the baud rate generator.
- */
- m8260_cpm_setbrg(ser->smc_scc_num, bd->bi_baudrate);
-
- /* And finally, enable Rx and Tx.
- */
- sp->smc_smcmr |= SMCMR_REN | SMCMR_TEN;
-
- return 0;
-}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)