patch-2.2.18 linux/drivers/char/m68kserial.c
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- Lines: 1862
- Date:
Sat Oct 14 00:05:37 2000
- Orig file:
v2.2.17/drivers/char/m68kserial.c
- Orig date:
Thu Jan 1 01:00:00 1970
diff -u --new-file --recursive --exclude-from /usr/src/exclude v2.2.17/drivers/char/m68kserial.c linux/drivers/char/m68kserial.c
@@ -0,0 +1,1861 @@
+/*
+ * linux/drivers/char/m68kserial.c
+ *
+ *
+ * Copyright 1994 Roman Hodek <Roman.Hodek@informatik.uni-erlangen.de>
+ *
+ * Partially based on PC-Linux serial.c by Linus Torvalds and Theodore Ts'o
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * Extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92. Now
+ * much more extensible to support other serial cards based on the
+ * 16450/16550A UART's. Added support for the AST FourPort and the
+ * Accent Async board.
+ *
+ * set_serial_info fixed to set the flags, custom divisor, and uart
+ * type fields. Fix suggested by Michael K. Johnson 12/12/92.
+ *
+ * This module exports the following rs232 io functions:
+ *
+ * long m68k_rs_init(void);
+ */
+
+/*
+ * Notes and Design Goals:
+ * -----------------------
+ * The PC serial drivers can rely on the fact that all the serial
+ * hardware is very similar to program for all ports. Unfortunately,
+ * this is not true for m68k machines, especially the Atari. Here it is
+ * nearly the other way 'round: All ports need different treatment for
+ * the low-level stuff.
+ *
+ * For this reason, I've split the serial driver code into a
+ * port-independent part (serial.c) and port-specific parts (atari_*.c,
+ * ...). The first manages all what can be done without accessing the
+ * hardware directly, i.e. interfacing with the high-level tty drivers,
+ * wait queues, managing existing ports and the like. The latter do the
+ * actual hardware programming and are accessed by the hardware
+ * independent part by a "switch" structure, that contains pointers to
+ * functions for specific tasks. See the comment before the definition
+ * of the SERIALSWITCH structure in <linux/serial.h> for more details.
+ *
+ * The port-independent code should be usable by other machines than
+ * m68k ones, too, if there are similar circumstances with different
+ * serial port hardware. Feel free to use it, but please inform me if
+ * you have to do changes to it. I'll try to keep it really
+ * device-independent.
+ *
+ * Roman <Roman.Hodek@informatik.uni-erlangen.de>
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+
+#include <linux/types.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/m68kserial.h>
+#include <linux/major.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/mm.h>
+#include <linux/init.h>
+#ifdef CONFIG_PROC_FS
+#include <linux/proc_fs.h>
+#endif
+#ifdef CONFIG_SERIAL_CONSOLE
+#include <linux/console.h>
+#endif
+
+#include <asm/setup.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <asm/bitops.h>
+
+#ifdef CONFIG_ATARI
+#include "atari_SCC.h"
+#include "atari_MFPser.h"
+#include "atari_MIDI.h"
+#endif
+
+#ifdef CONFIG_KMOD
+#include <linux/kmod.h>
+#endif
+
+#ifdef CONFIG_MAC_SCC
+int mac_SCC_init(void);
+#endif
+
+#ifdef CONFIG_AMIGA_BUILTIN_SERIAL
+int amiga_serinit (void);
+#endif
+
+#ifdef CONFIG_GVPIOEXT
+int ioext_init (void);
+#endif
+
+#ifdef CONFIG_MULTIFACE_III_TTY
+int multiface_init(void);
+#endif
+
+#ifdef CONFIG_MVME147_SCC
+int m147_SCC_init(void);
+#endif
+
+#ifdef CONFIG_MVME162_SCC
+int mvme_SCC_init(void);
+#endif
+
+#ifdef CONFIG_BVME6000_SCC
+int bvme_SCC_init(void);
+#endif
+
+#ifdef CONFIG_WHIPPET
+int whippet_init (void);
+#endif
+
+#ifdef CONFIG_HYPERCOM1
+int hypercom1_init(void);
+#endif
+
+#ifdef CONFIG_HPDCA
+int hpdca_init(void);
+#endif
+
+DECLARE_TASK_QUEUE(tq_serial);
+
+struct tty_driver serial_driver, callout_driver;
+static int serial_refcount;
+
+/* serial subtype definitions */
+#define SERIAL_TYPE_NORMAL 1
+#define SERIAL_TYPE_CALLOUT 2
+
+/* number of characters left in xmit buffer before we ask for more */
+#define WAKEUP_CHARS 256
+
+#define SERIAL_PARANOIA_CHECK
+#define CONFIG_SERIAL_NOPAUSE_IO
+#define SERIAL_DO_RESTART
+
+#undef SERIAL_DEBUG_INTR
+#undef SERIAL_DEBUG_OPEN
+#undef SERIAL_DEBUG_FLOW
+
+#define _INLINE_ inline
+
+#define NR_PORTS 6
+
+struct m68k_async_struct rs_table[NR_PORTS];
+static struct tty_struct *serial_table[NR_PORTS];
+static struct termios *serial_termios[NR_PORTS];
+static struct termios *serial_termios_locked[NR_PORTS];
+#ifdef CONFIG_SERIAL_CONSOLE
+static struct console sercons;
+#endif
+
+#ifndef MIN
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
+
+static char *serialtypes[] = {
+ "unknown", "8250", "16450", "16550", "16550A"
+};
+#define PORT_MAX (sizeof(serialtypes)/sizeof(*serialtypes))
+#if defined(__mc68000__) || defined(CONFIG_APUS)
+static char *serialtypes68k[] = {
+ "SCC w/o DMA", "SCC w/ DMA",
+ "MFP", "MFP w/o ctrl lines",
+ "MIDI",
+ "Amiga builtin", "GVP IO-Extender (16c552)", "BSC MultiFaceCard III",
+ "Hisoft Whippet",
+ "SCC on MVME",
+ "8350 ESCC w/o DMA",
+ "HP DCA",
+ "SCC on BVME", "A1200 HyperCOM1"
+};
+#define M68K_PORT_MAX (sizeof(serialtypes68k)/sizeof(*serialtypes68k))
+#endif
+
+#ifdef CONFIG_PROC_FS
+static int rs_read_proc (char *buffer, char **start, off_t offset, int size,
+ int *eof, void *data)
+{
+ int len, i;
+ off_t begin = 0;
+ char *name;
+
+ len = sprintf (buffer, "Serial ports:\n");
+ for (i = 0; i < NR_PORTS; ++i) {
+ struct m68k_async_struct *info = &rs_table[i];
+
+ if (!info->port) continue;
+ if (info->type >= 0 && info->type < PORT_MAX)
+ name = serialtypes[info->type];
+#if defined(__mc68000__) || defined(CONFIG_APUS)
+ else if (info->type >= 100 && info->type < 100 + M68K_PORT_MAX)
+ name = serialtypes68k[info->type - 100];
+#endif
+ else
+ name = "unknown";
+ len += sprintf (buffer + len, "%d: name:%s port:0x%08x tx:%d rx:%d",
+ i, name, info->port, info->icount.tx, info->icount.rx);
+
+ if (info->icount.frame)
+ len += sprintf(buffer + len, " fe:%d", info->icount.frame);
+ if (info->icount.parity)
+ len += sprintf(buffer + len, " pe:%d", info->icount.parity);
+ if (info->icount.brk)
+ len += sprintf(buffer + len, " brk:%d", info->icount.brk);
+ if (info->icount.overrun)
+ len += sprintf(buffer + len, " oe:%d", info->icount.overrun);
+ len += sprintf(buffer + len, "\n");
+
+ if (len + begin > offset + size)
+ goto done;
+ if (len + begin < offset) {
+ begin += len;
+ len = 0;
+ }
+ }
+ *eof = 1;
+done:
+ if (offset >= len + begin)
+ return 0;
+ *start = buffer + (begin - offset);
+ return (size < begin + len - offset ? size : begin + len - offset);
+}
+#endif
+
+/*
+ * tmp_buf is used as a temporary buffer by serial_write. We need to
+ * lock it in case the copy_from_user blocks while swapping in a page,
+ * and some other program tries to do a serial write at the same time.
+ * Since the lock will only come under contention when the system is
+ * swapping and available memory is low, it makes sense to share one
+ * buffer across all the serial ports, since it significantly saves
+ * memory if large numbers of serial ports are open.
+ */
+static unsigned char *tmp_buf = 0;
+static struct semaphore tmp_buf_sem = MUTEX;
+
+static inline int serial_paranoia_check(struct m68k_async_struct *info,
+ kdev_t device, const char *routine)
+{
+#ifdef SERIAL_PARANOIA_CHECK
+ const char *badmagic =
+ "Warning: bad magic number for serial struct (%s) in %s\n";
+ const char *badinfo =
+ "Warning: null m68k_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;
+}
+
+/*
+ * ------------------------------------------------------------
+ * rs_stop() and rs_start()
+ *
+ * This routines are called before setting or resetting tty->stopped.
+ * They enable or disable transmitter interrupts, as necessary.
+ * ------------------------------------------------------------
+ */
+void rs_stop(struct tty_struct *tty)
+{
+ struct m68k_async_struct *info = (struct m68k_async_struct *)tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->device, "rs_stop"))
+ return;
+
+ info->sw->enab_tx_int( info, 0 );
+}
+
+void rs_start(struct tty_struct *tty)
+{
+ struct m68k_async_struct *info = (struct m68k_async_struct *)tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->device, "rs_start"))
+ return;
+
+ info->sw->enab_tx_int( info, 1 );
+}
+
+/*
+ * 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_)
+{
+ struct m68k_async_struct *info = (struct m68k_async_struct *) 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);
+ }
+}
+
+/*
+ * ---------------------------------------------------------------
+ * Low level utility subroutines for the serial driver: routines to
+ * figure out the appropriate timeout for an interrupt chain, routines
+ * to initialize and startup a serial port, and routines to shutdown a
+ * serial port. Useful stuff like that.
+ * ---------------------------------------------------------------
+ */
+
+static int startup(struct m68k_async_struct * info)
+{
+ unsigned long flags;
+ unsigned long page;
+
+ page = get_free_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+
+
+ save_flags(flags); cli();
+
+ if (info->flags & ASYNC_INITIALIZED) {
+ free_page(page);
+ restore_flags(flags);
+ return 0;
+ }
+
+ if (!info->port || !info->type) {
+ if (info->tty)
+ set_bit(TTY_IO_ERROR, &info->tty->flags);
+ free_page(page);
+ restore_flags(flags);
+ return 0;
+ }
+ if (info->xmit_buf)
+ free_page(page);
+ else
+ info->xmit_buf = (unsigned char *) page;
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk("starting up ttyS%d...", info->line);
+#endif
+
+ /* initialize the hardware specific stuff for the port */
+ info->sw->init(info);
+
+ if (info->tty)
+ clear_bit(TTY_IO_ERROR, &info->tty->flags);
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+
+ /*
+ * Set the speed and other port parameters.
+ */
+ info->sw->change_speed(info);
+
+ info->flags |= ASYNC_INITIALIZED;
+ restore_flags(flags);
+ return 0;
+}
+
+/*
+ * 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(struct m68k_async_struct * info)
+{
+ unsigned long flags;
+
+ if (!(info->flags & ASYNC_INITIALIZED))
+ return;
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk("Shutting down serial port %d\n", info->line);
+#endif
+
+ save_flags(flags); cli(); /* Disable interrupts */
+
+ /*
+ * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
+ * here so the queue might never be waken up
+ */
+ wake_up_interruptible(&info->delta_msr_wait);
+
+ /* do hardware specific deinitialization for the port */
+ info->sw->deinit( info, info->tty &&
+ !(info->tty->termios->c_cflag & HUPCL) );
+
+ if (info->xmit_buf) {
+ free_page((unsigned long) info->xmit_buf);
+ info->xmit_buf = 0;
+ }
+
+ if (info->tty)
+ set_bit(TTY_IO_ERROR, &info->tty->flags);
+
+ info->flags &= ~ASYNC_INITIALIZED;
+ restore_flags(flags);
+}
+
+static void rs_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ struct m68k_async_struct *info = (struct m68k_async_struct *)tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->device, "rs_put_char"))
+ return;
+
+ if (!tty || !info->xmit_buf)
+ return;
+
+ save_flags(flags); cli();
+ if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
+ restore_flags(flags);
+ return;
+ }
+
+ info->xmit_buf[info->xmit_head++] = ch;
+ info->xmit_head &= SERIAL_XMIT_SIZE-1;
+ info->xmit_cnt++;
+ restore_flags(flags);
+}
+
+static void rs_flush_chars(struct tty_struct *tty)
+{
+ struct m68k_async_struct *info = (struct m68k_async_struct *)tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->device, "rs_flush_chars"))
+ return;
+
+ if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
+ !info->xmit_buf)
+ return;
+
+ info->sw->enab_tx_int( info, 1 );
+}
+
+static int rs_write(struct tty_struct * tty, int from_user,
+ const unsigned char *buf, int count)
+{
+ int c, total = 0;
+ struct m68k_async_struct *info = (struct m68k_async_struct *)tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->device, "rs_write"))
+ return 0;
+
+ if (!tty || !info->xmit_buf || !tmp_buf)
+ return 0;
+
+ if (from_user)
+ down(&tmp_buf_sem);
+ save_flags(flags);
+ while (1) {
+ cli();
+ c = MIN(count, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
+ SERIAL_XMIT_SIZE - info->xmit_head));
+ if (c <= 0)
+ break;
+
+ if (from_user) {
+ restore_flags(flags);
+ copy_from_user(tmp_buf, buf, c);
+ cli();
+ c = MIN(c, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
+ SERIAL_XMIT_SIZE - info->xmit_head));
+ memcpy(info->xmit_buf + info->xmit_head, tmp_buf, c);
+ } else
+ memcpy(info->xmit_buf + info->xmit_head, buf, c);
+ info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
+ info->xmit_cnt += c;
+ restore_flags(flags);
+ buf += c;
+ count -= c;
+ total += c;
+ }
+ if (from_user)
+ up(&tmp_buf_sem);
+ if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
+ info->sw->enab_tx_int( info, 1 );
+ restore_flags(flags);
+ return total;
+}
+
+static int rs_write_room(struct tty_struct *tty)
+{
+ struct m68k_async_struct *info = (struct m68k_async_struct *)tty->driver_data;
+ int ret;
+
+ if (serial_paranoia_check(info, tty->device, "rs_write_room"))
+ return 0;
+ ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
+ if (ret < 0)
+ ret = 0;
+ return ret;
+}
+
+static int rs_chars_in_buffer(struct tty_struct *tty)
+{
+ struct m68k_async_struct *info = (struct m68k_async_struct *)tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->device, "rs_chars_in_buffer"))
+ return 0;
+ return info->xmit_cnt;
+}
+
+static void rs_flush_buffer(struct tty_struct *tty)
+{
+ struct m68k_async_struct *info = (struct m68k_async_struct *)tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->device, "rs_flush_buffer"))
+ return;
+ save_flags(flags);
+ cli();
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+ restore_flags(flags);
+ wake_up_interruptible(&tty->write_wait);
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+ tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup)(tty);
+}
+
+/*
+ * ------------------------------------------------------------
+ * rs_throttle()
+ *
+ * This routine is called by the upper-layer tty layer to signal that
+ * incoming characters should be throttled.
+ * ------------------------------------------------------------
+ */
+static void rs_throttle(struct tty_struct * tty)
+{
+ struct m68k_async_struct *info = (struct m68k_async_struct *)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)) {
+ info->x_char = STOP_CHAR(tty);
+ /* make sure the XOFF char is sent out if the TX was idle */
+ info->sw->enab_tx_int( info, 1 );
+ }
+
+ if (C_CRTSCTS(tty))
+ info->sw->throttle( info, 1 );
+}
+
+static void rs_unthrottle(struct tty_struct * tty)
+{
+ unsigned long flags;
+ struct m68k_async_struct *info = (struct m68k_async_struct *)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)) {
+ /* Protect against an tx int between the test and resetting x_char.
+ * This would cause the XON to be lost. */
+ save_flags(flags);
+ cli();
+ if (info->x_char) {
+ info->x_char = 0;
+ restore_flags(flags);
+ }
+ else {
+ restore_flags(flags);
+ info->x_char = START_CHAR(tty);
+ /* make sure the XOFF char is sent out if the TX was idle */
+ info->sw->enab_tx_int( info, 1 );
+ }
+ }
+
+ if (C_CRTSCTS(tty))
+ info->sw->throttle( info, 0 );
+}
+
+/*
+ * ------------------------------------------------------------
+ * rs_ioctl() and friends
+ * ------------------------------------------------------------
+ */
+
+static int get_serial_info(struct m68k_async_struct * info,
+ struct serial_struct * retinfo)
+{
+ struct serial_struct tmp;
+
+ memset(&tmp, 0, sizeof(tmp));
+ tmp.type = info->type;
+ tmp.line = info->line;
+ tmp.port = 0; /* meaningless for non-Intel */
+ tmp.irq = 0; /* meaningless for non-Intel */
+ tmp.flags = info->flags;
+ /* tmp.baud_base = info->baud_base;*/
+ tmp.close_delay = info->close_delay;
+ tmp.closing_wait = info->closing_wait;
+ tmp.custom_divisor = info->custom_divisor;
+ tmp.hub6 = 0; /* meaningless for non-Intel */
+
+ /* At least baud_base and costum_divisor set by port-specific
+ * function
+ */
+ info->sw->get_serial_info( info, &tmp );
+
+ if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
+ return -EFAULT;
+ return 0;
+}
+
+static int set_serial_info(struct m68k_async_struct * info,
+ struct serial_struct * new_info)
+{
+ struct serial_struct new_serial;
+ struct m68k_async_struct old_info;
+ int retval = 0;
+
+ if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
+ return -EFAULT;
+ old_info = *info;
+
+ /* If a new custom divisor is to be set, let it check by the hardware
+ * specific code first! (It is given the new info struct in case the
+ * baud_base has also changed and valid divisors depend on the baud_base.)
+ */
+ if (new_serial.custom_divisor != info->custom_divisor ||
+ new_serial.baud_base != info->baud_base) {
+ if (info->sw->check_custom_divisor( info, new_serial.baud_base,
+ new_serial.custom_divisor ))
+ return( -EINVAL );
+ }
+
+ if (((new_serial.type != info->type) ||
+ (new_serial.close_delay != info->close_delay) ||
+ ((new_serial.flags & ~ASYNC_USR_MASK) !=
+ (info->flags & ~ASYNC_USR_MASK)))
+ && !capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ /*
+ * OK, past this point, all the error checking has been done.
+ * At this point, we start making changes.....
+ */
+
+ info->baud_base = new_serial.baud_base;
+ info->flags = ((info->flags & ~ASYNC_FLAGS) |
+ (new_serial.flags & ASYNC_FLAGS));
+ info->custom_divisor = new_serial.custom_divisor;
+ info->type = new_serial.type;
+ info->close_delay = new_serial.close_delay * HZ/100;
+ info->closing_wait = new_serial.closing_wait * HZ/100;
+
+ if (!info->port || !info->type)
+ return 0;
+ if (info->flags & ASYNC_INITIALIZED) {
+ if (((old_info.flags & ASYNC_SPD_MASK) !=
+ (info->flags & ASYNC_SPD_MASK)) ||
+ (old_info.custom_divisor != info->custom_divisor) ||
+ (old_info.baud_base != info->baud_base))
+ info->sw->change_speed(info);
+ } else
+ retval = startup(info);
+ return retval;
+}
+
+
+static int get_modem_info(struct m68k_async_struct * info, unsigned int *value)
+{
+ unsigned int result;
+
+ result = info->sw->get_modem_info (info);
+ return put_user(result,value);
+}
+
+static int set_modem_info(struct m68k_async_struct * info, unsigned int cmd,
+ unsigned int *value)
+{
+ unsigned int arg;
+ int new_dtr = -1, new_rts = -1;
+
+ if (get_user(arg, value))
+ return -EFAULT;
+ switch (cmd) {
+ case TIOCMBIS:
+ if (arg & TIOCM_RTS)
+ new_rts = 1;
+ if (arg & TIOCM_DTR)
+ new_dtr = 1;
+ break;
+ case TIOCMBIC:
+ if (arg & TIOCM_RTS)
+ new_rts = 0;
+ if (arg & TIOCM_DTR)
+ new_dtr = 0;
+ break;
+ case TIOCMSET:
+ new_dtr = !!(arg & TIOCM_DTR);
+ new_rts = !!(arg & TIOCM_RTS);
+ break;
+ default:
+ return -EINVAL;
+ }
+ return( info->sw->set_modem_info( info, new_dtr, new_rts ) );
+}
+
+/*
+ * rs_break() --- routine which turns the break handling on or off
+ */
+static void rs_break(struct tty_struct *tty, int break_state)
+{
+ struct m68k_async_struct * info = (struct m68k_async_struct *)tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->device, "rs_break"))
+ return;
+
+ if (!info->port)
+ return;
+ save_flags(flags);
+ cli();
+ if (break_state == -1)
+ info->sw->set_break(info, 1);
+ else
+ info->sw->set_break(info, 0);
+ restore_flags(flags);
+}
+
+static int rs_ioctl(struct tty_struct *tty, struct file * file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct m68k_async_struct * info = (struct m68k_async_struct *)tty->driver_data;
+ struct async_icount cprev, cnow; /* kernel counter temps */
+ struct serial_icounter_struct *p_cuser; /* user space */
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->device, "rs_ioctl"))
+ return -ENODEV;
+
+ if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
+ (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
+ (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
+ if (tty->flags & (1 << TTY_IO_ERROR))
+ return -EIO;
+ }
+
+ switch (cmd) {
+ 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);
+ case TIOCGSERIAL:
+ return get_serial_info(info,
+ (struct serial_struct *) arg);
+ case TIOCSSERIAL:
+ return set_serial_info(info,
+ (struct serial_struct *) arg);
+ case TIOCSERCONFIG:
+ /* return do_autoconfig(info); */
+ return ( 0 );
+
+ case TIOCSERGETLSR: /* Get line status register */
+ return put_user(0, (unsigned int *) arg);
+
+ case TIOCSERGSTRUCT:
+ if (copy_to_user((struct m68k_async_struct *) arg,
+ info, sizeof(struct m68k_async_struct)))
+ return -EFAULT;
+ return 0;
+
+ case TIOCSERGETMULTI:
+ case TIOCSERSETMULTI:
+ return -EINVAL;
+
+ /*
+ * 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:
+ save_flags(flags);
+ cli();
+ cprev = info->icount; /* note the counters on entry */
+ restore_flags(flags);
+ while (1) {
+ interruptible_sleep_on(&info->delta_msr_wait);
+ /* see if a signal did it */
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+ save_flags(flags);
+ cli();
+ cnow = info->icount; /* atomic copy */
+ restore_flags(flags);
+ 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 */
+
+ /*
+ * 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:
+ save_flags(flags);
+ cli();
+ cnow = info->icount;
+ restore_flags(flags);
+ p_cuser = (struct serial_icounter_struct *) arg;
+ if (put_user(cnow.cts, &p_cuser->cts) ||
+ put_user(cnow.dsr, &p_cuser->dsr) ||
+ put_user(cnow.rng, &p_cuser->rng) ||
+ put_user(cnow.dcd, &p_cuser->dcd))
+ return -EFAULT;
+ return 0;
+
+ default:
+ if (info->sw->ioctl)
+ return( info->sw->ioctl( tty, file, info, cmd, arg ) );
+ else
+ return -ENOIOCTLCMD;
+ }
+ return 0;
+}
+
+static void rs_set_termios(struct tty_struct *tty, struct termios *old_termios)
+{
+ struct m68k_async_struct *info = (struct m68k_async_struct *)tty->driver_data;
+
+ if (tty->termios->c_cflag == old_termios->c_cflag)
+ return;
+
+ info->sw->change_speed(info);
+
+ if ((old_termios->c_cflag & CRTSCTS) &&
+ !(tty->termios->c_cflag & CRTSCTS)) {
+ tty->hw_stopped = 0;
+ rs_start(tty);
+ }
+
+#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_close(struct tty_struct *tty, struct file * filp)
+{
+ struct m68k_async_struct * info = (struct m68k_async_struct *)tty->driver_data;
+ unsigned long flags;
+ unsigned long timeout;
+
+ if (!info || serial_paranoia_check(info, tty->device, "rs_close"))
+ return;
+
+ save_flags(flags); cli();
+
+ if (tty_hung_up_p(filp)) {
+ MOD_DEC_USE_COUNT;
+ restore_flags(flags);
+ return;
+ }
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk("rs_close ttys%d, count = %d\n", info->line, info->count);
+#endif
+ if ((tty->count == 1) && (info->count != 1)) {
+ /*
+ * Uh, oh. tty->count is 1, which means that the tty
+ * structure will be freed. Info->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, "
+ "info->count is %d\n", info->count);
+ info->count = 1;
+ }
+ if (--info->count < 0) {
+ printk("rs_close: bad serial port count for ttys%d: %d\n",
+ info->line, info->count);
+ info->count = 0;
+ }
+ if (info->count) {
+ 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->normal_termios = *tty->termios;
+ if (info->flags & ASYNC_CALLOUT_ACTIVE)
+ info->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.
+ */
+ if (info->flags & ASYNC_INITIALIZED) {
+ info->sw->stop_receive(info);
+ /*
+ * Before we drop DTR, make sure the UART transmitter
+ * has completely drained; this is especially
+ * important if there is a transmit FIFO!
+ */
+ timeout = jiffies+HZ;
+ while (!(info->sw->trans_empty(info))) {
+ current->state = TASK_INTERRUPTIBLE;
+ schedule_timeout(info->timeout);
+ if (signal_pending(current))
+ break;
+ if (time_after(jiffies, timeout))
+ break;
+ }
+ current->state = TASK_RUNNING;
+ }
+ 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_hangup() --- called by tty_hangup() when a hangup is signaled.
+ */
+static void rs_hangup(struct tty_struct *tty)
+{
+ struct m68k_async_struct * info = (struct m68k_async_struct *)tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->device, "rs_hangup"))
+ return;
+
+ rs_flush_buffer(tty);
+ shutdown(info);
+ info->event = 0;
+ info->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,
+ struct m68k_async_struct *info)
+{
+ struct wait_queue wait = { current, NULL };
+ int retval;
+ int do_clocal = 0;
+ unsigned long flags;
+
+ /*
+ * 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
+ return ((info->flags & ASYNC_HUP_NOTIFY) ?
+ -EAGAIN : -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 ((filp->f_flags & O_NONBLOCK) ||
+ (tty->flags & (1 << TTY_IO_ERROR))) {
+ if (info->flags & ASYNC_CALLOUT_ACTIVE)
+ return -EBUSY;
+ info->flags |= ASYNC_NORMAL_ACTIVE;
+ return 0;
+ }
+
+ if (info->flags & ASYNC_CALLOUT_ACTIVE) {
+ if (info->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, info->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;
+ add_wait_queue(&info->open_wait, &wait);
+#ifdef SERIAL_DEBUG_OPEN
+ printk("block_til_ready before block: ttys%d, count = %d\n",
+ info->line, info->count);
+#endif
+ save_flags(flags);
+ cli();
+ if (!tty_hung_up_p(filp))
+ info->count--;
+ restore_flags(flags);
+ info->blocked_open++;
+ while (1) {
+ save_flags(flags);
+ cli();
+ if (!(info->flags & ASYNC_CALLOUT_ACTIVE))
+ info->sw->set_modem_info( info, 1, 1 );
+ restore_flags(flags);
+ 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 || (info->sw->get_modem_info( info ) & TIOCM_CAR)))
+ break;
+ if (signal_pending(current)) {
+ retval = -ERESTARTSYS;
+ break;
+ }
+#ifdef SERIAL_DEBUG_OPEN
+ printk("block_til_ready blocking: ttys%d, count = %d\n",
+ info->line, info->count);
+#endif
+ schedule();
+ }
+ current->state = TASK_RUNNING;
+ remove_wait_queue(&info->open_wait, &wait);
+ if (!tty_hung_up_p(filp))
+ info->count++;
+ info->blocked_open--;
+#ifdef SERIAL_DEBUG_OPEN
+ printk("block_til_ready after blocking: ttys%d, count = %d\n",
+ info->line, info->count);
+#endif
+ if (retval)
+ return retval;
+ info->flags |= ASYNC_NORMAL_ACTIVE;
+ return 0;
+}
+
+/*
+ * 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_open(struct tty_struct *tty, struct file * filp)
+{
+ struct m68k_async_struct *info;
+ int retval, line;
+ unsigned long page;
+
+ line = MINOR(tty->device) - tty->driver.minor_start;
+ if ((line < 0) || (line >= NR_PORTS))
+ return -ENXIO;
+ info = rs_table + line;
+#ifdef CONFIG_KMOD
+ if (!info->port) {
+ char modname[30];
+ sprintf(modname, "char-major-%d-%d", TTY_MAJOR, MINOR(tty->device));
+ request_module(modname);
+ }
+#endif
+ if (!info->port)
+ return -ENXIO;
+ if (serial_paranoia_check(info, tty->device, "rs_open"))
+ return -ENODEV;
+
+ if (info->sw->check_open) {
+ if ((retval = info->sw->check_open( info, tty, filp )))
+ return( retval );
+ }
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk("rs_open %s%d, count = %d\n", tty->driver.name, info->line,
+ info->count);
+#endif
+ info->count++;
+ tty->driver_data = info;
+ info->tty = tty;
+
+ if (!tmp_buf) {
+ page = get_free_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+ if (tmp_buf)
+ free_page(page);
+ else
+ tmp_buf = (unsigned char *) page;
+ }
+
+ /*
+ * If the port is the middle of closing, bail out now
+ */
+ 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
+ return ((info->flags & ASYNC_HUP_NOTIFY) ?
+ -EAGAIN : -ERESTARTSYS);
+#else
+ return -EAGAIN;
+#endif
+ }
+
+ /*
+ * 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->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
+ if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
+ *tty->termios = info->normal_termios;
+ else
+ *tty->termios = info->callout_termios;
+ info->sw->change_speed(info);
+ }
+#ifdef CONFIG_SERIAL_CONSOLE
+ if (sercons.cflag && sercons.index == line) {
+ tty->termios->c_cflag = sercons.cflag;
+ sercons.cflag = 0;
+ info->sw->change_speed(info);
+ }
+#endif
+
+ info->session = current->session;
+ info->pgrp = current->pgrp;
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk("rs_open ttys%d successful...", info->line);
+#endif
+ return 0;
+}
+
+/*
+ * ---------------------------------------------------------------------
+ * rs_init() and friends
+ *
+ * rs_init() is called at boot-time to initialize the serial driver.
+ * ---------------------------------------------------------------------
+ */
+
+/*
+ * Boot-time initialization code: Init the serial ports present on
+ * this machine type.
+ *
+ * Current HW Port to minor/device name mapping:
+ *
+ * Atari
+ * TT | Falcon || minor | name
+ * -----------------------+---------------------------++-------+-------
+ * ST-MFP port (Modem1) | (Modem1, internal only) || 64 | ttyS0
+ * SCC B (Modem2) | SCC B (Modem2) || 65 | ttyS1
+ * TT-MFP port (Serial1) | || 66 | ttyS2
+ * SCC A (Serial2) | || 67 | ttyS3
+ * SCC A (LAN) | SCC A (LAN) || 68 | ttyS4
+ * Atari MIDI | Atari MIDI || 69 | ttyS5
+ *
+ * New 22/12/94: Midi is implemented as a serial device to make use of
+ * MIDI networks easier (SLIP on ttyS5). If there is need for MIDI
+ * specific high-level code, it can be implemented as a line
+ * discipline in future. ttyS4 is reserved to make space for the LAN
+ * device. It seems to be the better solution to split Serial2 and LAN
+ * into separate minors. And maybe the port to device mapping will
+ * change in future...
+ *
+ * 02/08/95: Now the mapping has changed! My old mapping scheme of the serial
+ * ports was a flaw in respect to order the devices following their
+ * capabilities. And it confused the users, to... The "new" order is the same
+ * as the one used by TOS. The only difference is that Serial2/LAN is split
+ * into two devices, only one of which can be open at one time. If one of
+ * these devices is opened, the respective port's hardware is activated via
+ * IO7 of the PSG (if connected...)
+ *
+ * Amiga
+ * Amiga built-in serial port || 64 | ttyS0
+ *
+ * New 13/07/95: Support for multiple serial-boards of the same kind,
+ * and boards with dual (or higher) uarts. This is done by letting the
+ * drivers 'allocate' tty's in the rs_table[rs_count] array. A counter
+ * (rs_count) is therefore passed to all serial-init routines, that
+ * adds the amount of uarts detected, and returns the new value.
+ * I think this is the best way to manage the various serial-boards
+ * available (atleast for the Amiga), and should cause no harm to the
+ * old drivers. - Jes Sorensen (jds@kom.auc.dk)
+ *
+ */
+
+/*
+ * 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 "M68K Serial driver version 1.01\n");
+}
+
+EXPORT_SYMBOL(rs_table);
+EXPORT_SYMBOL(tq_serial);
+EXPORT_SYMBOL(m68k_register_serial);
+EXPORT_SYMBOL(m68k_unregister_serial);
+EXPORT_SYMBOL(rs_start);
+EXPORT_SYMBOL(rs_stop);
+
+/*
+ * The serial driver boot-time initialization code!
+ */
+int __init m68k_rs_init(void)
+{
+ int i, rs_count;
+ struct m68k_async_struct * info;
+
+#ifdef CONFIG_Q40
+ if (MACH_IS_Q40)
+ return 0;
+#endif
+ rs_count = 0; /* All machines start at rs_table[0] (minor 64). */
+
+ init_bh(SERIAL_BH, do_serial_bh);
+
+#ifdef CONFIG_SERIAL_CONSOLE
+ /*
+ * The interrupt of the serial console port
+ * can't be shared.
+ */
+ if (sercons.flags & CON_CONSDEV) {
+ for(i = 0; i < NR_PORTS; i++)
+ if (i != sercons.index &&
+ rs_table[i].irq == rs_table[sercons.index].irq)
+ rs_table[i].irq = 0;
+ }
+#endif
+ show_serial_version();
+
+ /* Initialize the tty_driver structure */
+
+ memset(&serial_driver, 0, sizeof(struct tty_driver));
+ serial_driver.magic = TTY_DRIVER_MAGIC;
+ serial_driver.driver_name = "serial";
+ serial_driver.name = "ttyS";
+ 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 =
+ B9600 | 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_open;
+ serial_driver.close = rs_close;
+ serial_driver.write = rs_write;
+ serial_driver.put_char = rs_put_char;
+ serial_driver.flush_chars = rs_flush_chars;
+ serial_driver.write_room = rs_write_room;
+ serial_driver.chars_in_buffer = rs_chars_in_buffer;
+ serial_driver.flush_buffer = rs_flush_buffer;
+ serial_driver.ioctl = rs_ioctl;
+ serial_driver.throttle = rs_throttle;
+ serial_driver.unthrottle = rs_unthrottle;
+ serial_driver.set_termios = rs_set_termios;
+ serial_driver.stop = rs_stop;
+ serial_driver.start = rs_start;
+ serial_driver.hangup = rs_hangup;
+ serial_driver.break_ctl = rs_break;
+ /* TODO: serial_driver.wait_until_sent = rs_wait_until_sent; */
+#ifdef CONFIG_PROC_FS
+ serial_driver.read_proc = rs_read_proc;
+#endif
+
+ /*
+ * The callout device is just like normal device except for
+ * major number and the subtype code.
+ */
+ callout_driver = serial_driver;
+ callout_driver.name = "cua";
+ callout_driver.major = TTYAUX_MAJOR;
+ callout_driver.subtype = SERIAL_TYPE_CALLOUT;
+ callout_driver.read_proc = 0;
+
+ if (tty_register_driver(&serial_driver)) {
+ printk("Couldn't register serial driver\n");
+ return -EIO;
+ }
+ if (tty_register_driver(&callout_driver)) {
+ tty_unregister_driver(&serial_driver);
+ printk("Couldn't register callout driver\n");
+ return -EIO;
+ }
+
+ for (i = 0, info = rs_table; i < NR_PORTS; i++,info++) {
+ info->magic = SERIAL_MAGIC;
+ info->line = i;
+ info->port = 0;
+ info->tty = 0;
+ info->type = PORT_UNKNOWN;
+ info->custom_divisor = 0;
+ info->close_delay = 5*HZ/10;
+ info->closing_wait = 30*HZ;
+ info->x_char = 0;
+ info->event = 0;
+ info->count = 0;
+ info->blocked_open = 0;
+ info->tqueue.routine = do_softint;
+ info->tqueue.data = info;
+ info->callout_termios =callout_driver.init_termios;
+ info->normal_termios = serial_driver.init_termios;
+ info->open_wait = 0;
+ info->close_wait = 0;
+ info->delta_msr_wait = 0;
+ info->icount.cts = info->icount.dsr = 0;
+ info->icount.rng = info->icount.dcd = 0;
+ info->icount.rx = info->icount.tx = 0;
+ info->icount.frame = info->icount.parity = 0;
+ info->icount.overrun = info->icount.brk = 0;
+ info->next_port = 0;
+ info->prev_port = 0;
+ }
+
+#ifndef MODULE
+ switch (m68k_machtype) {
+ case MACH_ATARI:
+#ifdef CONFIG_ATARI_SCC
+ atari_SCC_init();
+#endif
+#ifdef CONFIG_ATARI_MFPSER
+ atari_MFPser_init();
+#endif
+#ifdef CONFIG_ATARI_MIDI
+ atari_MIDI_init();
+#endif
+ break;
+
+ case MACH_AMIGA:
+#ifdef CONFIG_AMIGA_BUILTIN_SERIAL
+ amiga_serinit();
+#endif
+#ifdef CONFIG_GVPIOEXT
+ ioext_init();
+#endif
+#ifdef CONFIG_MULTIFACE_III_TTY
+ multiface_init();
+#endif
+#ifdef CONFIG_WHIPPET_SERIAL
+ whippet_init();
+#endif
+#ifdef CONFIG_HYPERCOM1
+ hypercom1_init();
+#endif
+ break;
+ case MACH_MVME147:
+#ifdef CONFIG_MVME147_SCC
+ m147_SCC_init();
+#endif
+ break;
+ case MACH_MVME16x:
+#ifdef CONFIG_MVME162_SCC
+ mvme_SCC_init();
+#endif
+ break;
+ case MACH_BVME6000:
+#ifdef CONFIG_BVME6000_SCC
+ bvme_SCC_init();
+#endif
+ break;
+ case MACH_MAC:
+#ifdef CONFIG_MAC_SCC
+ mac_SCC_init();
+#endif
+ case MACH_HP300:
+#ifdef CONFIG_HPDCA
+ hpdca_init();
+#endif
+ } /* end switch on machine type */
+#endif
+
+ return 0;
+}
+
+/*
+ * register_serial and unregister_serial allows for serial ports to be
+ * configured at run-time, to support PCMCIA modems.
+ *
+ * ++roman: Removed PCish stuff from here... New calling interface: The caller
+ * can set req->line to a value >= 0 to request a particular slot. If
+ * req->line is < 0, the first free slot is assigned. Other fields that must
+ * be filled in before the call are 'port' and 'type'.
+ */
+int m68k_register_serial(struct serial_struct *req)
+{
+ int i;
+ unsigned long flags;
+ struct m68k_async_struct *info;
+
+ save_flags(flags);
+ cli();
+#if !defined(__mc68000__) && !defined(CONFIG_APUS)
+ for (i = 0; i < NR_PORTS; i++) {
+ if (rs_table[i].port == req->port)
+ break;
+ }
+#else
+ if (req->line >= 0) {
+ if (req->line >= NR_PORTS)
+ return -EINVAL;
+ if (rs_table[req->line].type != PORT_UNKNOWN ||
+ rs_table[req->line].count > 0) {
+ /* already allocated */
+ restore_flags(flags);
+ return -EBUSY;
+ }
+ i = req->line;
+ }
+ else {
+ for (i = 0; i < NR_PORTS; i++)
+ if ((rs_table[i].type == PORT_UNKNOWN) &&
+ (rs_table[i].count == 0))
+ break;
+ }
+#endif
+ if (i == NR_PORTS) {
+ restore_flags(flags);
+ return -EAGAIN;
+ }
+ info = &rs_table[i];
+ if (rs_table[i].count) {
+ restore_flags(flags);
+ printk("Couldn't configure serial #%d (port=%d,irq=%d): "
+ "device already open\n", i, req->port, req->irq);
+ return -EBUSY;
+ }
+#if !defined(__mc68000__) && !defined(CONFIG_APUS)
+ info->irq = req->irq;
+ info->port = req->port;
+ autoconfig(info);
+ if (info->type == PORT_UNKNOWN) {
+ restore_flags(flags);
+ printk("register_serial(): autoconfig failed\n");
+ return -1;
+ }
+ printk(KERN_INFO "tty%02d at 0x%04x (irq = %d)", info->line,
+ info->port, info->irq);
+#else
+ info->port = req->port;
+ info->type = req->type;
+ printk(KERN_INFO "ttyS%d at 0x%08x: ", info->line, info->port);
+#endif
+ if (info->type >= 0 && info->type < PORT_MAX)
+ printk( "%s\n", serialtypes[info->type] );
+#if defined(__mc68000__) || defined(CONFIG_APUS)
+ else if (info->type >= 100 && info->type < 100 + M68K_PORT_MAX)
+ printk( "%s\n", serialtypes68k[info->type - 100] );
+#endif
+ else
+ printk( "\n" );
+ restore_flags(flags);
+ return info->line;
+}
+
+void m68k_unregister_serial(int line)
+{
+ unsigned long flags;
+ struct m68k_async_struct *info = &rs_table[line];
+
+ save_flags(flags);
+ cli();
+ if (info->tty)
+ tty_hangup(info->tty);
+ info->type = PORT_UNKNOWN;
+#if defined(__mc68000__) || defined(CONFIG_APUS)
+ info->port = 0;
+#endif
+ printk(KERN_INFO "tty%02d unloaded\n", info->line);
+ restore_flags(flags);
+}
+
+#ifdef MODULE
+int init_module(void)
+{
+ return m68k_rs_init();
+}
+
+void cleanup_module(void)
+{
+ if (tty_unregister_driver(&serial_driver))
+ printk("SERIAL: failed to unregister serial driver\n");
+ if (tty_unregister_driver(&callout_driver))
+ printk("SERIAL: failed to unregister callout driver\n");
+}
+#endif /* MODULE */
+
+
+/*
+ * ------------------------------------------------------------
+ * Serial console driver
+ * ------------------------------------------------------------
+ */
+#ifdef CONFIG_SERIAL_CONSOLE
+
+static kdev_t serial_console_device(struct console *c)
+{
+ return MKDEV(TTY_MAJOR, 64 + c->index);
+}
+
+extern void amiga_serial_console_write(struct console *co, const char *s, unsigned int count);
+extern int amiga_serial_console_wait_key(struct console *co);
+extern void amiga_init_serial_console(struct async_struct *info, int cflag);
+
+extern void atari_mfp_console_write (struct console *co, const char *str, unsigned int count);
+extern int atari_mfp_console_wait_key(struct console *co);
+extern void atari_init_mfp_port( int cflag );
+
+extern void atari_scc_console_write (struct console *co, const char *str, unsigned int count);
+extern int atari_scc_console_wait_key(struct console *co);
+extern void atari_init_scc_port( int cflag );
+
+extern void atari_midi_console_write (struct console *co, const char *str, unsigned int count);
+extern int atari_midi_console_wait_key(struct console *co);
+extern void atari_init_midi_port( int cflag );
+
+extern void mac_sccb_console_write (struct console *co, const char *str, unsigned int count);
+extern int mac_sccb_console_wait_key(struct console *co);
+extern void mac_init_sccb_port( int cflag );
+
+extern void mac_scca_console_write (struct console *co, const char *str, unsigned int count);
+extern int mac_scca_console_wait_key(struct console *co);
+extern void mac_init_scca_port( int cflag );
+
+extern void mvme147_init_console_port (struct console *co, int cflag);
+extern void mvme16x_init_console_port (struct console *co, int cflag);
+extern void bvme6000_init_console_port (struct console *co, int cflag);
+
+extern void hpdca_serial_console_write(struct console *co, const char *str, unsigned int count);
+extern int hpdca_serial_console_wait_key(struct console *co);
+extern int hpdca_init_serial_console(int cflag);
+
+/*
+ * Setup initial baud/bits/parity.
+ */
+__initfunc(static int serial_console_setup(struct console *co, char *options))
+{
+ char *s;
+ int baud = 0, bits, parity;
+ int cflag = CREAD | HUPCL | CLOCAL;
+
+ bits = 8;
+ parity = 'n';
+
+ if (options) {
+ baud = simple_strtoul(options, NULL, 10);
+ s = options;
+ while(*s >= '0' && *s <= '9')
+ s++;
+ if (*s) parity = *s++;
+ if (*s) bits = *s - '0';
+ }
+
+ /* Now construct a cflag setting. */
+ switch(baud) {
+ case 1200:
+ cflag |= B1200;
+ break;
+ case 2400:
+ cflag |= B2400;
+ break;
+ case 4800:
+ cflag |= B4800;
+ break;
+ case 19200:
+ cflag |= B19200;
+ break;
+ case 38400:
+ cflag |= B38400;
+ break;
+ case 57600:
+ cflag |= B57600;
+ break;
+ case 9600:
+ default:
+ cflag |= B9600;
+ break;
+ }
+ switch(bits) {
+ case 7:
+ cflag |= CS7;
+ break;
+ case 8:
+ default:
+ cflag |= CS8;
+ break;
+ }
+ switch(parity) {
+ case 'o': case 'O':
+ cflag |= PARENB|PARODD;
+ break;
+ case 'e': case 'E':
+ cflag |= PARENB;
+ break;
+ }
+ co->cflag = cflag;
+
+ /* Initialization of the port and filling in the missing fields of the
+ * sercons struct must happen here, since register_console() already uses
+ * write to print the log buffer. */
+
+ /* Currently this supports the Amiga builtin port only */
+ if (MACH_IS_AMIGA && co->index == 0) {
+ co->write = amiga_serial_console_write;
+ co->wait_key = amiga_serial_console_wait_key;
+ /* no initialization yet */
+ /* amiga_init_serial_console(rs_table+co->index, */
+ /* serial_console_cflag); */
+ }
+ /* On Atari, Modem1 (ttyS0), Modem2 (ttyS1) and MIDI (ttyS5) are supported
+ * Note: On a TT, 57.6 and 115.2 kbps are not possible and are replaced by
+ * 76.8 and 153.6 kbps.
+ * Note2: On MIDI, 7812.5 bps is selected by 4800 on the command line, and
+ * 500 kbps by 115200. All other rates give standard 31250bps. Mode 7N is
+ * not possible and replaced by 7O2 ... */
+ else if (MACH_IS_ATARI && co->index == 0) {
+ co->write = atari_mfp_console_write;
+ co->wait_key = atari_mfp_console_wait_key;
+ atari_init_mfp_port( cflag );
+ }
+ else if (MACH_IS_ATARI && co->index == 1) {
+ co->write = atari_scc_console_write;
+ co->wait_key = atari_scc_console_wait_key;
+ atari_init_scc_port( cflag );
+ }
+ else if (MACH_IS_ATARI && co->index == 5) {
+ co->write = atari_midi_console_write;
+ co->wait_key = atari_midi_console_wait_key;
+ atari_init_midi_port( cflag );
+ }
+ else if (MACH_IS_MVME147 && co->index == 0) {
+ mvme147_init_console_port (co, cflag);
+ }
+ else if (MACH_IS_MAC && co->index == 0) {
+ co->write = mac_scca_console_write;
+ co->wait_key = mac_scca_console_wait_key;
+ mac_init_scca_port( cflag );
+ }
+ else if (MACH_IS_MAC && co->index == 1) {
+ co->write = mac_sccb_console_write;
+ co->wait_key = mac_sccb_console_wait_key;
+ mac_init_sccb_port( cflag );
+ }
+ else if (MACH_IS_MVME16x && co->index == 0) {
+ mvme16x_init_console_port (co, cflag);
+ }
+ else if (MACH_IS_BVME6000 && co->index == 0) {
+ bvme6000_init_console_port (co, cflag);
+ }
+ return( 0 );
+}
+
+static void dummy_console_write( struct console *co, const char *str,
+ unsigned int count )
+{
+}
+
+static int dummy_wait_key( struct console *co )
+{
+ return( '\r' );
+}
+
+static struct console sercons = {
+ "ttyS",
+ dummy_console_write, /* filled in by serial_console_setup */
+ NULL,
+ serial_console_device,
+ dummy_wait_key, /* filled in by serial_console_setup */
+ NULL,
+ serial_console_setup,
+ CON_PRINTBUFFER,
+ -1,
+ 0,
+ NULL
+};
+
+/*
+ * This is here to set the speed etc. for a non-initialized
+ * line. We have no termios struct yet, so we just use "cflag".
+ */
+long m68k_serial_console_init(long kmem_start, long kmem_end)
+{
+ /* I've opted to init the HP serial console here. Doing it in
+ * serial_console_setup (above) is clearly far too late,
+ * and in the machine-dependent setup is too early.
+ * This may not be precisely correct or very clean but it's
+ * easy, and I'm not going to spend any time fixing m68kserial.c
+ * because it's going to go away soon.
+ * -- Peter Maydell <pmaydell@chiark.greenend.org.uk>
+ */
+#ifdef CONFIG_HPDCA
+ if (MACH_IS_HP300) {
+ if (hpdca_init_serial_console(B9600|CS8)) {
+ sercons.write = hpdca_serial_console_write;
+ sercons.wait_key = hpdca_serial_console_wait_key;
+ }
+ }
+#endif
+ register_console(&sercons);
+ return kmem_start;
+}
+#endif /* CONFIG_SERIAL_CONSOLE */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)