patch-2.1.127 linux/drivers/sbus/char/su.c
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- Lines: 2872
- Date:
Thu Nov 5 09:58:44 1998
- Orig file:
v2.1.126/linux/drivers/sbus/char/su.c
- Orig date:
Thu Aug 6 14:06:32 1998
diff -u --recursive --new-file v2.1.126/linux/drivers/sbus/char/su.c linux/drivers/sbus/char/su.c
@@ -1,69 +1,164 @@
-/* $Id: su.c,v 1.10 1998/05/29 06:00:26 ecd Exp $
- * su.c: Small serial driver for keyboard/mouse interface on Ultra/AX
+/* $Id: su.c,v 1.12 1998/10/25 04:24:52 ecd Exp $
+ * su.c: Small serial driver for keyboard/mouse interface on sparc32/PCI
*
* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
+ * Coypright (C) 1998 Pete Zaitcev (zaitcev@metabyte.com)
*
- * This is mainly a very stripped down version of drivers/char/serial.c,
+ * This is mainly a variation of drivers/char/serial.c,
* credits go to authors mentioned therein.
*/
+/*
+ * Configuration section.
+ */
+#define SERIAL_PARANOIA_CHECK
+#define CONFIG_SERIAL_NOPAUSE_IO /* Unused on sparc */
+#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
+#undef SERIAL_DEBUG_THROTTLE
+
+#define RS_ISR_PASS_LIMIT 256
+
+/*
+ * 0x20 is sun4m thing, Dave Redman heritage.
+ * See arch/sparc/kernel/irq.c.
+ */
+#define IRQ_4M(n) ((n)|0x20)
+
+#if defined(MODULE) && defined(SERIAL_DEBUG_MCOUNT)
+#define DBG_CNT(s) \
+do { \
+ printk("(%s): [%x] refc=%d, serc=%d, ttyc=%d -> %s\n", \
+ kdevname(tty->device), (info->flags), serial_refcount, \
+ info->count,tty->count,s); \
+} while (0);
+#else
+#define DBG_CNT(s)
+#endif
+
+/*
+ * End of serial driver configuration section.
+ */
+#include <linux/config.h>
+#include <linux/module.h>
#include <linux/errno.h>
#include <linux/signal.h>
+#include <linux/sched.h>
#include <linux/interrupt.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
#include <linux/serial.h>
#include <linux/serial_reg.h>
#include <linux/string.h>
+#include <linux/fcntl.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
+#include <linux/mm.h>
#include <linux/malloc.h>
#include <linux/init.h>
+#include <linux/delay.h>
+#ifdef CONFIG_SERIAL_CONSOLE
+#include <linux/console.h>
+#include <linux/major.h>
+#endif
+#include <linux/sysrq.h>
+#include <asm/system.h>
#include <asm/oplib.h>
#include <asm/io.h>
#include <asm/ebus.h>
#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/bitops.h>
#include "sunserial.h"
#include "sunkbd.h"
#include "sunmouse.h"
-static char *serial_name = "kbd/mouse serial driver";
-static char *serial_version = "1.0";
-
-/* Set of debugging defines */
-#undef SERIAL_DEBUG_INTR
-#undef SERIAL_DEBUG_OPEN
-
/* We are on a NS PC87303 clocked with 24.0 MHz, which results
* in a UART clock of 1.8462 MHz.
*/
#define BAUD_BASE (1846200 / 16)
+#ifdef CONFIG_SERIAL_CONSOLE
+extern int serial_console;
+static struct console sercons;
+int su_serial_console_init(void);
+#endif
+
+/*
+ * serial.c saves memory when it allocates async_info upon first open.
+ * We have parts of state structure together because we do call startup
+ * for keyboard and mouse.
+ */
struct su_struct {
int magic;
unsigned long port;
int baud_base;
- int type;
+ int type; /* Hardware type: e.g. 16550 */
int irq;
int flags;
- unsigned char IER;
- unsigned char MCR;
int line;
int cflag;
+
int kbd_node;
int ms_node;
+ int port_node;
+
char name[16];
-};
-static struct su_struct su_table[] = {
- { 0, 0, BAUD_BASE, PORT_UNKNOWN },
- { 0, 0, BAUD_BASE, PORT_UNKNOWN }
+ int xmit_fifo_size;
+ int custom_divisor;
+ unsigned short close_delay;
+ unsigned short closing_wait; /* time to wait before closing */
+
+ struct tty_struct *tty;
+ int read_status_mask;
+ int ignore_status_mask;
+ int timeout;
+ int quot;
+ int x_char; /* xon/xoff character */
+ int IER; /* Interrupt Enable Register */
+ int MCR; /* Modem control register */
+ unsigned long event;
+ int blocked_open; /* # of blocked opens */
+ long session; /* Session of opening process */
+ long pgrp; /* pgrp of opening process */
+ unsigned char *xmit_buf;
+ int xmit_head;
+ int xmit_tail;
+ int xmit_cnt;
+ struct tq_struct tqueue;
+ struct wait_queue *open_wait;
+ struct wait_queue *close_wait;
+ struct wait_queue *delta_msr_wait;
+
+ int count;
+ struct async_icount icount;
+ struct termios normal_termios, callout_termios;
+ unsigned long last_active; /* For async_struct, to be */
};
-#define NR_PORTS (sizeof(su_table) / sizeof(struct su_struct))
+static char *serial_name = "PCIO serial driver";
+static char *serial_version = "1.1";
+
+static DECLARE_TASK_QUEUE(tq_serial);
+
+static struct tty_driver serial_driver, callout_driver;
+static int serial_refcount;
+
+/* number of characters left in xmit buffer before we ask for more */
+#define WAKEUP_CHARS 256
-static void autoconfig(struct su_struct * info);
+static void autoconfig(struct su_struct *info);
static void change_speed(struct su_struct *info);
+static void su_wait_until_sent(struct tty_struct *tty, int timeout);
/*
* Here we define the default xmit fifo size used for each type of
@@ -83,12 +178,52 @@
{ 0, 0}
};
+
+#define NR_PORTS 4
+
+static struct su_struct su_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];
+
+#ifndef MIN
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
+
/*
- * This is used to figure out the divisor speeds and the timeouts
+ * 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 int baud_table[] = {
- 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
- 9600, 19200, 38400, 57600, 115200, 230400, 460800, 0 };
+static unsigned char *tmp_buf;
+static struct semaphore tmp_buf_sem = MUTEX;
+
+static inline int serial_paranoia_check(struct su_struct *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 su_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;
+}
+
+#ifdef __sparc_v9__
static inline
unsigned int su_inb(struct su_struct *info, unsigned long offset)
@@ -102,19 +237,117 @@
outb(value, info->port + offset);
}
+#else
+
+static inline
+unsigned int su_inb(struct su_struct *info, unsigned long offset)
+{
+ return (unsigned int)(*(volatile unsigned char *)(info->port + offset));
+}
+
static inline void
-receive_chars(struct su_struct *info, struct pt_regs *regs)
+su_outb(struct su_struct *info, unsigned long offset, int value)
+{
+ /*
+ * MrCoffee has weird schematics: IRQ4 & P10(?) pins of SuperIO are
+ * connected with a gate then go to SlavIO. When IRQ4 goes tristated
+ * gate gives logical one. Since we use level triggered interrupts
+ * we have lockup and watchdog reset. We cannot mask IRQ because
+ * keyboard shares IRQ with us (Bob Smelik: I would not hire you).
+ * P3: Assure that OUT2 never goes down.
+ */
+ if (offset == UART_MCR) value |= UART_MCR_OUT2;
+ *(volatile unsigned char *)(info->port + offset) = value;
+}
+
+#endif
+
+#define serial_in(info, off) su_inb(info, off)
+#define serial_inp(info, off) su_inb(info, off)
+#define serial_out(info, off, val) su_outb(info, off, val)
+#define serial_outp(info, off, val) su_outb(info, off, val)
+
+/*
+ * ------------------------------------------------------------
+ * su_stop() and su_start()
+ *
+ * This routines are called before setting or resetting tty->stopped.
+ * They enable or disable transmitter interrupts, as necessary.
+ * ------------------------------------------------------------
+ */
+static void su_stop(struct tty_struct *tty)
+{
+ struct su_struct *info = (struct su_struct *)tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->device, "su_stop"))
+ return;
+
+ save_flags(flags); cli();
+ if (info->IER & UART_IER_THRI) {
+ info->IER &= ~UART_IER_THRI;
+ serial_out(info, UART_IER, info->IER);
+ }
+ restore_flags(flags);
+}
+
+static void su_start(struct tty_struct *tty)
+{
+ struct su_struct *info = (struct su_struct *)tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->device, "su_start"))
+ return;
+
+ save_flags(flags); cli();
+ if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
+ info->IER |= UART_IER_THRI;
+ serial_out(info, UART_IER, info->IER);
+ }
+ restore_flags(flags);
+}
+
+/*
+ * ----------------------------------------------------------------------
+ *
+ * Here starts the interrupt handling routines. All of the following
+ * subroutines are declared as inline and are folded into
+ * su_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
+su_sched_event(struct su_struct *info, int event)
+{
+ info->event |= 1 << event;
+ queue_task(&info->tqueue, &tq_serial);
+ mark_bh(SERIAL_BH);
+}
+
+static __inline__ void
+receive_kbd_ms_chars(struct su_struct *info, struct pt_regs *regs)
{
unsigned char status = 0;
unsigned char ch;
do {
- ch = su_inb(info, UART_RX);
-
-#ifdef SERIAL_DEBUG_INTR
- printk("DR%02x:%02x...", ch, status);
-#endif
-
+ ch = serial_inp(info, UART_RX);
if (info->kbd_node) {
if(ch == SUNKBD_RESET) {
l1a_state.kbd_id = 1;
@@ -142,11 +375,206 @@
} while (status & UART_LSR_DR);
}
+static __inline__ void
+receive_serial_chars(struct su_struct *info, int *status, struct pt_regs *regs)
+{
+ struct tty_struct *tty = info->tty;
+ unsigned char ch;
+ int ignored = 0;
+ struct async_icount *icount;
+
+ icount = &info->icount;
+ do {
+ ch = serial_inp(info, UART_RX);
+
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE)
+ break;
+ *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 & (UART_LSR_BI | UART_LSR_PE |
+ UART_LSR_FE | UART_LSR_OE)) {
+ /*
+ * For statistics only
+ */
+ if (*status & UART_LSR_BI) {
+ *status &= ~(UART_LSR_FE | UART_LSR_PE);
+ icount->brk++;
+ } else if (*status & UART_LSR_PE)
+ icount->parity++;
+ else if (*status & UART_LSR_FE)
+ icount->frame++;
+ if (*status & UART_LSR_OE)
+ 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;
+ goto ignore_char;
+ }
+ *status &= info->read_status_mask;
+
+ if (*status & (UART_LSR_BI)) {
+#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 & UART_LSR_PE)
+ *tty->flip.flag_buf_ptr = TTY_PARITY;
+ else if (*status & UART_LSR_FE)
+ *tty->flip.flag_buf_ptr = TTY_FRAME;
+ if (*status & UART_LSR_OE) {
+ /*
+ * 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;
+ }
+ }
+ }
+ tty->flip.flag_buf_ptr++;
+ tty->flip.char_buf_ptr++;
+ tty->flip.count++;
+ ignore_char:
+ *status = serial_inp(info, UART_LSR);
+ } while (*status & UART_LSR_DR);
+ tty_flip_buffer_push(tty);
+}
+
+static __inline__ void
+transmit_chars(struct su_struct *info, int *intr_done)
+{
+ int count;
+
+ if (info->x_char) {
+ serial_outp(info, UART_TX, info->x_char);
+ info->icount.tx++;
+ info->x_char = 0;
+ if (intr_done)
+ *intr_done = 0;
+ return;
+ }
+ if ((info->xmit_cnt <= 0) || info->tty->stopped ||
+ info->tty->hw_stopped) {
+ info->IER &= ~UART_IER_THRI;
+ serial_out(info, UART_IER, info->IER);
+ return;
+ }
+
+ count = info->xmit_fifo_size;
+ do {
+ serial_out(info, UART_TX, info->xmit_buf[info->xmit_tail++]);
+ info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
+ info->icount.tx++;
+ if (--info->xmit_cnt <= 0)
+ break;
+ } while (--count > 0);
+
+ if (info->xmit_cnt < WAKEUP_CHARS)
+ su_sched_event(info, RS_EVENT_WRITE_WAKEUP);
+
+#ifdef SERIAL_DEBUG_INTR
+ printk("THRE...");
+#endif
+ if (intr_done)
+ *intr_done = 0;
+
+ if (info->xmit_cnt <= 0) {
+ info->IER &= ~UART_IER_THRI;
+ serial_out(info, UART_IER, info->IER);
+ }
+}
+
+static __inline__ void
+check_modem_status(struct su_struct *info)
+{
+ int status;
+ struct async_icount *icount;
+
+ status = serial_in(info, UART_MSR);
+
+ if (status & UART_MSR_ANY_DELTA) {
+ icount = &info->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("doing serial hangup...");
+#endif
+ if (info->tty)
+ tty_hangup(info->tty);
+ }
+ }
+ 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);
+ su_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);
+ }
+ }
+ }
+}
+
/*
- * This is the serial driver's generic interrupt routine
+ * This is the kbd/mouse serial driver's interrupt routine
*/
static void
-su_interrupt(int irq, void *dev_id, struct pt_regs * regs)
+su_kbd_ms_interrupt(int irq, void *dev_id, struct pt_regs * regs)
{
struct su_struct *info = (struct su_struct *)dev_id;
unsigned char status;
@@ -154,52 +582,171 @@
#ifdef SERIAL_DEBUG_INTR
printk("su_interrupt(%s)...", __irq_itoa(irq));
#endif
+ if (!info)
+ return;
- if (su_inb(info, UART_IIR) & UART_IIR_NO_INT)
+ if (serial_in(info, UART_IIR) & UART_IIR_NO_INT)
return;
- status = su_inb(info, UART_LSR);
+ status = serial_inp(info, UART_LSR);
#ifdef SERIAL_DEBUG_INTR
printk("status = %x...", status);
#endif
if (status & UART_LSR_DR)
- receive_chars(info, regs);
+ receive_kbd_ms_chars(info, regs);
+
+#ifdef SERIAL_DEBUG_INTR
+ printk("end.\n");
+#endif
+}
+
+/*
+ * This is the serial driver's generic interrupt routine
+ */
+static void
+su_serial_interrupt(int irq, void *dev_id, struct pt_regs * regs)
+{
+ int status;
+ struct su_struct *info;
+ int pass_counter = 0;
+
+#ifdef SERIAL_DEBUG_INTR
+ printk("su_interrupt(%s)...", __irq_itoa(irq));
+#endif
+ info = (struct su_struct *)dev_id;
+ if (!info || !info->tty)
+ return;
+
+ do {
+ status = serial_inp(info, UART_LSR);
+#ifdef SERIAL_DEBUG_INTR
+ printk("status = %x...", status);
+#endif
+ if (status & UART_LSR_DR)
+ receive_serial_chars(info, &status, regs);
+ check_modem_status(info);
+ if (status & UART_LSR_THRE)
+ transmit_chars(info, 0);
+
+ if (pass_counter++ > RS_ISR_PASS_LIMIT) {
+#if 0
+ printk("rs loop break\n");
+#endif
+ break; /* Prevent infinite loops */
+ }
+ } while (!(serial_in(info, UART_IIR) & UART_IIR_NO_INT));
+
+ 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
+ * su_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 su_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 su_struct *info = (struct su_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 su_struct * info)
+startup(struct su_struct *info)
{
unsigned long flags;
int retval=0;
+ unsigned long page;
- save_flags(flags); cli();
-
- if (info->flags & ASYNC_INITIALIZED) {
- goto errout;
- }
+ save_flags(flags);
+ if (info->tty) {
+ page = get_free_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+
+ cli();
+
+ if (info->flags & ASYNC_INITIALIZED) {
+ free_page(page);
+ goto errout;
+ }
- if (!info->port || !info->type) {
- goto errout;
+ if (info->port == 0 || info->type == PORT_UNKNOWN) {
+ set_bit(TTY_IO_ERROR, &info->tty->flags);
+ free_page(page);
+ goto errout;
+ }
+ if (info->xmit_buf)
+ free_page(page);
+ else
+ info->xmit_buf = (unsigned char *) page;
}
+ cli();
#ifdef SERIAL_DEBUG_OPEN
- printk("starting up su%d (irq %s)...", info->line,
- __irq_itoa(info->irq));
+ printk("starting up ttys%d (irq %d)...", info->line, state->irq);
#endif
- if (info->type == PORT_16750)
- su_outb(info, UART_IER, 0);
+ if (uart_config[info->type].flags & UART_STARTECH) {
+ /* Wake up UART */
+ serial_outp(info, UART_LCR, 0xBF);
+ serial_outp(info, UART_EFR, UART_EFR_ECB);
+ serial_outp(info, UART_IER, 0);
+ serial_outp(info, UART_EFR, 0);
+ serial_outp(info, UART_LCR, 0);
+ }
+
+ if (info->type == PORT_16750) {
+ /* Wake up UART */
+ serial_outp(info, UART_IER, 0);
+ }
/*
* Clear the FIFO buffers and disable them
* (they will be reenabled in change_speed())
*/
if (uart_config[info->type].flags & UART_CLEAR_FIFO)
- su_outb(info, UART_FCR, (UART_FCR_CLEAR_RCVR |
+ serial_outp(info, UART_FCR, (UART_FCR_CLEAR_RCVR |
UART_FCR_CLEAR_XMIT));
/*
@@ -207,47 +754,84 @@
* if it is, then bail out, because there's likely no UART
* here.
*/
- if (su_inb(info, UART_LSR) == 0xff) {
- retval = -ENODEV;
+ if (serial_inp(info, UART_LSR) == 0xff) {
+ if (capable(CAP_SYS_ADMIN)) {
+ if (info->tty)
+ set_bit(TTY_IO_ERROR, &info->tty->flags);
+ } else
+ retval = -ENODEV;
goto errout;
}
-
+
/*
* Allocate the IRQ if necessary
*/
- retval = request_irq(info->irq, su_interrupt, SA_SHIRQ,
- info->name, info);
- if (retval)
+ if (info->kbd_node || info->ms_node) {
+ retval = request_irq(info->irq, su_kbd_ms_interrupt,
+ SA_SHIRQ, info->name, info);
+ } else {
+ retval = request_irq(info->irq, su_serial_interrupt,
+ SA_SHIRQ, info->name, info);
+ }
+ if (retval) {
+ if (capable(CAP_SYS_ADMIN)) {
+ if (info->tty)
+ set_bit(TTY_IO_ERROR, &info->tty->flags);
+ retval = 0;
+ }
goto errout;
+ }
/*
* Clear the interrupt registers.
*/
- su_inb(info, UART_RX);
- su_inb(info, UART_IIR);
- su_inb(info, UART_MSR);
+ (void) serial_inp(info, UART_RX);
+ (void) serial_inp(info, UART_IIR);
+ (void) serial_inp(info, UART_MSR);
/*
* Now, initialize the UART
*/
- su_outb(info, UART_LCR, UART_LCR_WLEN8); /* reset DLAB */
+ serial_outp(info, UART_LCR, UART_LCR_WLEN8); /* reset DLAB */
- info->MCR = UART_MCR_OUT2;
- su_outb(info, UART_MCR, info->MCR);
+ info->MCR = 0;
+ if (info->tty && info->tty->termios->c_cflag & CBAUD)
+ info->MCR = UART_MCR_DTR | UART_MCR_RTS;
+ if (info->irq != 0)
+ info->MCR |= UART_MCR_OUT2;
+ serial_outp(info, UART_MCR, info->MCR);
/*
* Finally, enable interrupts
*/
- info->IER = UART_IER_RLSI | UART_IER_RDI;
- su_outb(info, UART_IER, info->IER); /* enable interrupts */
-
+ info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
+ serial_outp(info, UART_IER, info->IER); /* enable interrupts */
+
/*
* And clear the interrupt registers again for luck.
*/
- su_inb(info, UART_LSR);
- su_inb(info, UART_RX);
- su_inb(info, UART_IIR);
- su_inb(info, UART_MSR);
+ (void)serial_inp(info, UART_LSR);
+ (void)serial_inp(info, UART_RX);
+ (void)serial_inp(info, UART_IIR);
+ (void)serial_inp(info, UART_MSR);
+
+ if (info->tty)
+ clear_bit(TTY_IO_ERROR, &info->tty->flags);
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+
+ /*
+ * Set up the tty->alt_speed kludge
+ */
+ if (info->tty) {
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+ info->tty->alt_speed = 57600;
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+ info->tty->alt_speed = 115200;
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+ info->tty->alt_speed = 230400;
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+ info->tty->alt_speed = 460800;
+ }
/*
* and set the speed of the serial port
@@ -257,38 +841,135 @@
info->flags |= ASYNC_INITIALIZED;
restore_flags(flags);
return 0;
-
+
errout:
restore_flags(flags);
return retval;
}
/*
- * This routine is called to set the UART divisor registers to match
- * the specified baud rate for a serial port.
+ * 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
-change_speed(struct su_struct *info)
+shutdown(struct su_struct *info)
{
- unsigned char cval, fcr = 0;
- int quot = 0;
- unsigned long flags;
- int i;
+ unsigned long flags;
- /* byte size and parity */
- switch (info->cflag & CSIZE) {
- case CS5: cval = 0x00; break;
- case CS6: cval = 0x01; break;
- case CS7: cval = 0x02; break;
- case CS8: cval = 0x03; break;
- /* Never happens, but GCC is too dumb to figure it out */
- default: cval = 0x00; break;
- }
- if (info->cflag & CSTOPB) {
- cval |= 0x04;
+ if (!(info->flags & ASYNC_INITIALIZED))
+ return;
+
+ 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);
+
+ /*
+ * Free the IRQ, if necessary
+ */
+ free_irq(info->irq, info);
+
+ if (info->xmit_buf) {
+ free_page((unsigned long) info->xmit_buf);
+ info->xmit_buf = 0;
}
- if (info->cflag & PARENB) {
+
+ info->IER = 0;
+ serial_outp(info, UART_IER, 0x00); /* disable all intrs */
+ info->MCR &= ~UART_MCR_OUT2;
+
+ /* disable break condition */
+ serial_out(info, UART_LCR, serial_inp(info, UART_LCR) & ~UART_LCR_SBC);
+
+ if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
+ info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
+ serial_outp(info, UART_MCR, info->MCR);
+
+ /* disable FIFO's */
+ serial_outp(info, UART_FCR, (UART_FCR_CLEAR_RCVR |
+ UART_FCR_CLEAR_XMIT));
+ (void)serial_in(info, UART_RX); /* read data port to reset things */
+
+ if (info->tty)
+ set_bit(TTY_IO_ERROR, &info->tty->flags);
+
+ if (uart_config[info->type].flags & UART_STARTECH) {
+ /* Arrange to enter sleep mode */
+ serial_outp(info, UART_LCR, 0xBF);
+ serial_outp(info, UART_EFR, UART_EFR_ECB);
+ serial_outp(info, UART_IER, UART_IERX_SLEEP);
+ serial_outp(info, UART_LCR, 0);
+ }
+ if (info->type == PORT_16750) {
+ /* Arrange to enter sleep mode */
+ serial_outp(info, UART_IER, UART_IERX_SLEEP);
+ }
+ info->flags &= ~ASYNC_INITIALIZED;
+ restore_flags(flags);
+}
+
+static __inline__ int
+su_get_baud_rate(struct su_struct *info)
+{
+ 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
+ };
+ int i;
+
+ if (info->tty)
+ return tty_get_baud_rate(info->tty);
+
+ i = info->cflag & CBAUD;
+ if (i & CBAUDEX) {
+ i &= ~(CBAUDEX);
+ if (i < 1 || i > 4)
+ info->cflag &= ~(CBAUDEX);
+ else
+ i += 15;
+ }
+ return baud_table[i];
+}
+
+/*
+ * This routine is called to set the UART divisor registers to match
+ * the specified baud rate for a serial port.
+ */
+static void
+change_speed(struct su_struct *info)
+{
+ int quot = 0, baud;
+ unsigned int cval, fcr = 0;
+ int bits;
+ unsigned long flags;
+
+ if (!info->kbd_node && !info->ms_node) {
+ if (!info->tty || !info->tty->termios)
+ return;
+ if (!info->port)
+ return;
+ info->cflag = info->tty->termios->c_cflag;
+ }
+
+ /* byte size and parity */
+ switch (info->cflag & CSIZE) {
+ case CS5: cval = 0x00; bits = 7; break;
+ case CS6: cval = 0x01; bits = 8; break;
+ case CS7: cval = 0x02; bits = 9; break;
+ case CS8: cval = 0x03; bits = 10; break;
+ /* Never happens, but GCC is too dumb to figure it out */
+ default: cval = 0x00; bits = 7; break;
+ }
+ if (info->cflag & CSTOPB) {
+ cval |= 0x04;
+ bits++;
+ }
+ if (info->cflag & PARENB) {
cval |= UART_LCR_PARITY;
+ bits++;
}
if (!(info->cflag & PARODD))
cval |= UART_LCR_EPAR;
@@ -297,101 +978,1195 @@
cval |= UART_LCR_SPAR;
#endif
- /* Determine divisor based on baud rate */
- i = info->cflag & CBAUD;
- if (i & CBAUDEX) {
- i &= ~CBAUDEX;
- if (i < 1 || i > 4)
- info->cflag &= ~CBAUDEX;
+ /* Determine divisor based on baud rate */
+ baud = su_get_baud_rate(info);
+ if (baud == 38400 &&
+ ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST))
+ quot = info->custom_divisor;
+ else {
+ if (baud == 134)
+ /* Special case since 134 is really 134.5 */
+ quot = (2 * info->baud_base / 269);
+ else if (baud)
+ quot = info->baud_base / baud;
+ }
+ /* If the quotient is ever zero, default to 9600 bps */
+ if (!quot)
+ quot = info->baud_base / 9600;
+ info->timeout = ((info->xmit_fifo_size*HZ*bits*quot) / info->baud_base);
+ info->timeout += HZ/50; /* Add .02 seconds of slop */
+
+ /* Set up FIFO's */
+ if (uart_config[info->type].flags & UART_USE_FIFO) {
+ if ((info->baud_base / quot) < 9600)
+ fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
+ else
+ fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8;
+ }
+ if (info->type == PORT_16750)
+ fcr |= UART_FCR7_64BYTE;
+
+ /* 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 (info->cflag & CRTSCTS) {
+ info->flags |= ASYNC_CTS_FLOW;
+ info->IER |= UART_IER_MSI;
+ } else
+ info->flags &= ~ASYNC_CTS_FLOW;
+ if (info->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);
+
+ /*
+ * Set up parity check flag
+ */
+ if (info->tty) {
+#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
+
+ info->read_status_mask = UART_LSR_OE | UART_LSR_THRE |
+ UART_LSR_DR;
+ if (I_INPCK(info->tty))
+ info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
+ if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
+ info->read_status_mask |= UART_LSR_BI;
+
+ /*
+ * Characters to ignore
+ */
+ info->ignore_status_mask = 0;
+ if (I_IGNPAR(info->tty))
+ info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
+ if (I_IGNBRK(info->tty)) {
+ info->ignore_status_mask |= UART_LSR_BI;
+ /*
+ * If we're ignore parity and break indicators, ignore
+ * overruns too. (For real raw support).
+ */
+ if (I_IGNPAR(info->tty))
+ info->ignore_status_mask |= UART_LSR_OE;
+ }
+ /*
+ * !!! ignore all characters if CREAD is not set
+ */
+ if ((info->cflag & CREAD) == 0)
+ info->ignore_status_mask |= UART_LSR_DR;
+ }
+
+ save_flags(flags); cli();
+ if (uart_config[info->type].flags & UART_STARTECH) {
+ serial_outp(info, UART_LCR, 0xBF);
+ serial_outp(info, UART_EFR,
+ (info->cflag & CRTSCTS) ? UART_EFR_CTS : 0);
+ }
+ serial_outp(info, UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */
+ serial_outp(info, UART_DLL, quot & 0xff); /* LS of divisor */
+ serial_outp(info, UART_DLM, quot >> 8); /* MS of divisor */
+ if (info->type == PORT_16750)
+ serial_outp(info, UART_FCR, fcr); /* set fcr */
+ serial_outp(info, UART_LCR, cval); /* reset DLAB */
+ if (info->type != PORT_16750)
+ serial_outp(info, UART_FCR, fcr); /* set fcr */
+ restore_flags(flags);
+ info->quot = quot;
+}
+
+static void
+su_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ struct su_struct *info = (struct su_struct *)tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->device, "su_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 su_put_char_kbd(unsigned char c)
+{
+ struct su_struct *info = su_table;
+ int lsr;
+
+ if (!info->kbd_node)
+ ++info;
+ if (!info)
+ return;
+
+ do {
+ lsr = serial_in(info, UART_LSR);
+ } while (!(lsr & UART_LSR_THRE));
+
+ /* Send the character out. */
+ su_outb(info, UART_TX, c);
+}
+
+static void
+su_change_mouse_baud(int baud)
+{
+ struct su_struct *info = su_table;
+
+ if (!info->ms_node)
+ ++info;
+ if (!info)
+ return;
+
+ info->cflag &= ~(CBAUDEX | CBAUD);
+ switch(baud) {
+ case 1200:
+ info->cflag |= B1200;
+ break;
+ case 2400:
+ info->cflag |= B2400;
+ break;
+ case 4800:
+ info->cflag |= B4800;
+ break;
+ case 9600:
+ info->cflag |= B9600;
+ break;
+ default:
+ printk("su_change_mouse_baud: unknown baud rate %d, "
+ "defaulting to 1200\n", baud);
+ info->cflag |= 1200;
+ break;
+ }
+ change_speed(info);
+}
+
+static void
+su_flush_chars(struct tty_struct *tty)
+{
+ struct su_struct *info = (struct su_struct *)tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->device, "su_flush_chars"))
+ return;
+
+ if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
+ !info->xmit_buf)
+ return;
+
+ save_flags(flags); cli();
+ info->IER |= UART_IER_THRI;
+ serial_out(info, UART_IER, info->IER);
+ restore_flags(flags);
+}
+
+static int
+su_write(struct tty_struct * tty, int from_user,
+ const unsigned char *buf, int count)
+{
+ int c, ret = 0;
+ struct su_struct *info = (struct su_struct *)tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->device, "su_write"))
+ return 0;
+
+ if (!tty || !info->xmit_buf || !tmp_buf)
+ return 0;
+
+ save_flags(flags);
+ if (from_user) {
+ down(&tmp_buf_sem);
+ while (1) {
+ c = MIN(count,
+ MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
+ SERIAL_XMIT_SIZE - info->xmit_head));
+ if (c <= 0)
+ break;
+
+ c -= copy_from_user(tmp_buf, buf, c);
+ if (!c) {
+ if (!ret)
+ ret = -EFAULT;
+ break;
+ }
+ 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);
+ info->xmit_head = ((info->xmit_head + c) &
+ (SERIAL_XMIT_SIZE-1));
+ info->xmit_cnt += c;
+ restore_flags(flags);
+ buf += c;
+ count -= c;
+ ret += c;
+ }
+ up(&tmp_buf_sem);
+ } else {
+ while (1) {
+ cli();
+ c = MIN(count,
+ MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
+ SERIAL_XMIT_SIZE - info->xmit_head));
+ if (c <= 0) {
+ restore_flags(flags);
+ break;
+ }
+ memcpy(info->xmit_buf + info->xmit_head, buf, c);
+ info->xmit_head = ((info->xmit_head + c) &
+ (SERIAL_XMIT_SIZE-1));
+ info->xmit_cnt += c;
+ restore_flags(flags);
+ buf += c;
+ count -= c;
+ ret += c;
+ }
+ }
+ if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
+ !(info->IER & UART_IER_THRI)) {
+ info->IER |= UART_IER_THRI;
+ serial_out(info, UART_IER, info->IER);
+ }
+ return ret;
+}
+
+static int
+su_write_room(struct tty_struct *tty)
+{
+ struct su_struct *info = (struct su_struct *)tty->driver_data;
+ int ret;
+
+ if (serial_paranoia_check(info, tty->device, "su_write_room"))
+ return 0;
+ ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
+ if (ret < 0)
+ ret = 0;
+ return ret;
+}
+
+static int
+su_chars_in_buffer(struct tty_struct *tty)
+{
+ struct su_struct *info = (struct su_struct *)tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->device, "su_chars_in_buffer"))
+ return 0;
+ return info->xmit_cnt;
+}
+
+static void
+su_flush_buffer(struct tty_struct *tty)
+{
+ struct su_struct *info = (struct su_struct *)tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->device, "su_flush_buffer"))
+ return;
+ cli();
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+ sti();
+ wake_up_interruptible(&tty->write_wait);
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+ tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup)(tty);
+}
+
+/*
+ * This function is used to send a high-priority XON/XOFF character to
+ * the device
+ */
+static void
+su_send_xchar(struct tty_struct *tty, char ch)
+{
+ struct su_struct *info = (struct su_struct *)tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->device, "su_send_char"))
+ return;
+
+ info->x_char = ch;
+ if (ch) {
+ /* Make sure transmit interrupts are on */
+ info->IER |= UART_IER_THRI;
+ serial_out(info, UART_IER, info->IER);
+ }
+}
+
+/*
+ * ------------------------------------------------------------
+ * su_throttle()
+ *
+ * This routine is called by the upper-layer tty layer to signal that
+ * incoming characters should be throttled.
+ * ------------------------------------------------------------
+ */
+static void
+su_throttle(struct tty_struct * tty)
+{
+ struct su_struct *info = (struct su_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, "su_throttle"))
+ return;
+
+ if (I_IXOFF(tty))
+ su_send_xchar(tty, STOP_CHAR(tty));
+
+ if (tty->termios->c_cflag & CRTSCTS)
+ info->MCR &= ~UART_MCR_RTS;
+
+ cli();
+ serial_out(info, UART_MCR, info->MCR);
+ sti();
+}
+
+static void
+su_unthrottle(struct tty_struct * tty)
+{
+ struct su_struct *info = (struct su_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, "su_unthrottle"))
+ return;
+
+ if (I_IXOFF(tty)) {
+ if (info->x_char)
+ info->x_char = 0;
+ else
+ su_send_xchar(tty, START_CHAR(tty));
+ }
+ if (tty->termios->c_cflag & CRTSCTS)
+ info->MCR |= UART_MCR_RTS;
+ cli();
+ serial_out(info, UART_MCR, info->MCR);
+ sti();
+}
+
+/*
+ * ------------------------------------------------------------
+ * su_ioctl() and friends
+ * ------------------------------------------------------------
+ */
+
+/*
+ * 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 su_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);
+}
+
+
+static int
+get_modem_info(struct su_struct * info, unsigned int *value)
+{
+ unsigned char control, status;
+ unsigned int result;
+
+ 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);
+ return put_user(result,value);
+}
+
+static int
+set_modem_info(struct su_struct * info, unsigned int cmd, unsigned int *value)
+{
+ int error;
+ unsigned int arg;
+
+ error = get_user(arg, value);
+ if (error)
+ return error;
+ 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();
+ return 0;
+}
+
+/*
+ * su_break() --- routine which turns the break handling on or off
+ */
+static void
+su_break(struct tty_struct *tty, int break_state)
+{
+ struct su_struct * info = (struct su_struct *)tty->driver_data;
+ unsigned long flags;
+
+ if (serial_paranoia_check(info, tty->device, "su_break"))
+ return;
+
+ if (!info->port)
+ return;
+ save_flags(flags); cli();
+ if (break_state == -1)
+ serial_out(info, UART_LCR,
+ serial_inp(info, UART_LCR) | UART_LCR_SBC);
+ else
+ serial_out(info, UART_LCR,
+ serial_inp(info, UART_LCR) & ~UART_LCR_SBC);
+ restore_flags(flags);
+}
+
+static int
+su_ioctl(struct tty_struct *tty, struct file * file,
+ unsigned int cmd, unsigned long arg)
+{
+ int error;
+ struct su_struct * info = (struct su_struct *)tty->driver_data;
+ struct async_icount cprev, cnow; /* kernel counter temps */
+ struct serial_icounter_struct *p_cuser; /* user space */
+
+ if (serial_paranoia_check(info, tty->device, "su_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 TIOCSERGETLSR: /* Get line status register */
+ return get_lsr_info(info, (unsigned int *) arg);
+
+#if 0
+ case TIOCSERGSTRUCT:
+ if (copy_to_user((struct async_struct *) arg,
+ info, sizeof(struct async_struct)))
+ return -EFAULT;
+ return 0;
+#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:
+ cli();
+ /* note the counters on entry */
+ cprev = info->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->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 */
+
+ /*
+ * 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->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; */ /* Trigger warnings is fall through by a chance. */
+}
+
+static void
+su_set_termios(struct tty_struct *tty, struct termios *old_termios)
+{
+ struct su_struct *info = (struct su_struct *)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);
+
+ /* 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->termios->c_cflag & CRTSCTS) ||
+ !test_bit(TTY_THROTTLED, &tty->flags)) {
+ 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;
+ su_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
+}
+
+/*
+ * ------------------------------------------------------------
+ * su_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
+su_close(struct tty_struct *tty, struct file * filp)
+{
+ struct su_struct *info = (struct su_struct *)tty->driver_data;
+ unsigned long flags;
+
+ if (!info || serial_paranoia_check(info, tty->device, "su_close"))
+ return;
+
+ 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("su_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("su_close: bad serial port count; tty->count is 1, "
+ "info->count is %d\n", info->count);
+ info->count = 1;
+ }
+ if (--info->count < 0) {
+ printk("su_close: bad serial port count for ttys%d: %d\n",
+ info->line, info->count);
+ info->count = 0;
+ }
+ if (info->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->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.
+ */
+ info->IER &= ~UART_IER_RLSI;
+ info->read_status_mask &= ~UART_LSR_DR;
+ if (info->flags & ASYNC_INITIALIZED) {
+ serial_out(info, UART_IER, info->IER);
+ /*
+ * Before we drop DTR, make sure the UART transmitter
+ * has completely drained; this is especially
+ * important if there is a transmit FIFO!
+ */
+ su_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);
+}
+
+/*
+ * su_wait_until_sent() --- wait until the transmitter is empty
+ */
+static void
+su_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+ struct su_struct * info = (struct su_struct *)tty->driver_data;
+ unsigned long orig_jiffies, char_time;
+ int lsr;
+
+ if (serial_paranoia_check(info, tty->device, "su_wait_until_sent"))
+ return;
+
+ if (info->type == PORT_UNKNOWN)
+ return;
+
+ 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 = (info->timeout - HZ/50) / info->xmit_fifo_size;
+ char_time = char_time / 5;
+ if (char_time == 0)
+ char_time = 1;
+ if (timeout)
+ char_time = MIN(char_time, timeout);
+#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+ printk("In su_wait_until_sent(%d) check=%lu...", timeout, char_time);
+ printk("jiff=%lu...", jiffies);
+#endif
+ while (!((lsr = serial_inp(info, UART_LSR)) & UART_LSR_TEMT)) {
+#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 && ((orig_jiffies + timeout) < jiffies))
+ break;
+ }
+ current->state = TASK_RUNNING;
+#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+ printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
+#endif
+}
+
+/*
+ * su_hangup() --- called by tty_hangup() when a hangup is signaled.
+ */
+static void
+su_hangup(struct tty_struct *tty)
+{
+ struct su_struct * info = (struct su_struct *)tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->device, "su_hangup"))
+ return;
+
+ su_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);
+}
+
+/*
+ * ------------------------------------------------------------
+ * su_open() and friends
+ * ------------------------------------------------------------
+ */
+static int
+block_til_ready(struct tty_struct *tty, struct file * filp,
+ struct su_struct *info)
+{
+ struct wait_queue wait = { current, NULL };
+ 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
+ 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
+ * su_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
+ cli();
+ if (!tty_hung_up_p(filp))
+ info->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();
+ 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, 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
+su_open(struct tty_struct *tty, struct file * filp)
+{
+ struct su_struct *info;
+ int retval, line;
+ unsigned long page;
+
+ line = MINOR(tty->device) - tty->driver.minor_start;
+ if ((line < 0) || (line >= NR_PORTS))
+ return -ENODEV;
+ info = su_table + line;
+ if (serial_paranoia_check(info, tty->device, "su_open"))
+ return -ENODEV;
+ info->count++;
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk("su_open %s%d, count = %d\n", tty->driver.name, info->line,
+ info->count);
+#endif
+ tty->driver_data = info;
+ info->tty = tty;
+ info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
+
+ if (!tmp_buf) {
+ page = get_free_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+ if (tmp_buf)
+ free_page(page);
else
- i += 15;
+ tmp_buf = (unsigned char *) page;
}
- if (!quot) {
- if (baud_table[i] == 134)
- /* Special case since 134 is really 134.5 */
- quot = (2 * info->baud_base / 269);
- else if (baud_table[i])
- quot = info->baud_base / baud_table[i];
- /* If the quotient is ever zero, default to 1200 bps */
- if (!quot)
- quot = info->baud_base / 1200;
+
+ /*
+ * 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;
- /* Set up FIFO's */
- if (uart_config[info->type].flags & UART_USE_FIFO)
- fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
+ MOD_INC_USE_COUNT;
+ retval = block_til_ready(tty, filp, info);
+ if (retval) {
+#ifdef SERIAL_DEBUG_OPEN
+ printk("su_open returning after block_til_ready with %d\n",
+ retval);
+#endif
+ return retval;
+ }
- su_outb(info, UART_IER, info->IER);
+ 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;
+ change_speed(info);
+ }
+#ifdef CONFIG_SERIAL_CONSOLE
+ if (sercons.cflag && sercons.index == line) {
+ tty->termios->c_cflag = sercons.cflag;
+ sercons.cflag = 0;
+ change_speed(info);
+ }
+#endif
+ info->session = current->session;
+ info->pgrp = current->pgrp;
- save_flags(flags); cli();
- su_outb(info, UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */
- su_outb(info, UART_DLL, quot & 0xff); /* LS of divisor */
- su_outb(info, UART_DLM, quot >> 8); /* MS of divisor */
- if (info->type == PORT_16750)
- su_outb(info, UART_FCR, fcr); /* set fcr */
- su_outb(info, UART_LCR, cval); /* reset DLAB */
- if (info->type != PORT_16750)
- su_outb(info, UART_FCR, fcr); /* set fcr */
- restore_flags(flags);
+#ifdef SERIAL_DEBUG_OPEN
+ printk("su_open ttys%d successful...", info->line);
+#endif
+ return 0;
}
-static void
-su_put_char(unsigned char c)
+/*
+ * /proc fs routines....
+ */
+static __inline__ int
+line_info(char *buf, struct su_struct *info)
{
- struct su_struct *info = su_table;
- int lsr;
+ char stat_buf[30], control, status;
+ int ret;
- if (!info->kbd_node)
- ++info;
+ ret = sprintf(buf, "%d: uart:%s port:%X irq:%s",
+ info->line, uart_config[info->type].name,
+ (int)info->port, __irq_itoa(info->irq));
+
+ if (info->port == 0 || info->type == PORT_UNKNOWN) {
+ ret += sprintf(buf+ret, "\n");
+ return ret;
+ }
- do {
- lsr = inb(info->port + UART_LSR);
- } while (!(lsr & UART_LSR_THRE));
+ /*
+ * Figure out the current RS-232 lines
+ */
+ 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",
+ info->baud_base / info->quot);
+ }
+
+ ret += sprintf(buf+ret, " tx:%d rx:%d",
+ info->icount.tx, info->icount.rx);
+
+ if (info->icount.frame)
+ ret += sprintf(buf+ret, " fe:%d", info->icount.frame);
- /* Send the character out. */
- su_outb(info, UART_TX, c);
+ if (info->icount.parity)
+ ret += sprintf(buf+ret, " pe:%d", info->icount.parity);
+
+ if (info->icount.brk)
+ ret += sprintf(buf+ret, " brk:%d", info->icount.brk);
+
+ if (info->icount.overrun)
+ ret += sprintf(buf+ret, " oe:%d", info->icount.overrun);
+
+ /*
+ * Last thing is the RS-232 status lines
+ */
+ ret += sprintf(buf+ret, " %s\n", stat_buf+1);
+ return ret;
}
-static void
-su_change_mouse_baud(int baud)
+int su_read_proc(char *page, char **start, off_t off, int count,
+ int *eof, void *data)
{
- struct su_struct *info = su_table;
-
- if (!info->ms_node)
- ++info;
- if (!info)
- return;
+ int i, len = 0;
+ off_t begin = 0;
- info->cflag &= ~(CBAUDEX | CBAUD);
- switch(baud) {
- case 1200:
- info->cflag |= B1200;
- break;
- case 2400:
- info->cflag |= B2400;
- break;
- case 4800:
- info->cflag |= B4800;
- break;
- case 9600:
- info->cflag |= B9600;
- break;
- default:
- printk("su_change_mouse_baud: unknown baud rate %d, "
- "defaulting to 1200\n", baud);
- info->cflag |= 1200;
- break;
+ 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, &su_table[i]);
+ if (len+begin > off+count)
+ goto done;
+ if (len+begin < off) {
+ begin += len;
+ len = 0;
+ }
}
- change_speed(info);
+ *eof = 1;
+done:
+ if (off >= len+begin)
+ return 0;
+ *start = page + (begin-off);
+ return ((count < begin+len-off) ? count : begin+len-off);
}
/*
+ * ---------------------------------------------------------------------
+ * su_init() and friends
+ *
+ * su_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_su_version(void)
+static __inline__
+void show_su_version(void)
{
printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
}
@@ -407,10 +2182,15 @@
autoconfig(struct su_struct *info)
{
unsigned char status1, status2, scratch, scratch2;
+#ifdef __sparc_v9__
struct linux_ebus_device *dev = 0;
struct linux_ebus *ebus;
+#else
+ struct linux_prom_registers reg0;
+#endif
unsigned long flags;
+#ifdef __sparc_v9__
for_each_ebus(ebus) {
for_each_ebusdev(dev, ebus) {
if (!strncmp(dev->prom_name, "su", 2)) {
@@ -430,9 +2210,29 @@
return;
info->irq = dev->irqs[0];
+#else
+ if (!info->port_node)
+ return;
+
+ if (prom_getproperty(info->port_node, "reg",
+ (char *)®0, sizeof(reg0)) == -1) {
+ prom_printf("su: no \"reg\" property\n");
+ return;
+ }
+ prom_apply_obio_ranges(®0, 1);
+ if ((info->port = (unsigned long) sparc_alloc_io(reg0.phys_addr,
+ 0, reg0.reg_size, "su-regs", reg0.which_io, 0)) == 0) {
+ prom_printf("su: cannot map\n");
+ return;
+ }
+ /*
+ * There is no intr property on MrCoffee, so hardwire it. Krups?
+ */
+ info->irq = IRQ_4M(13);
+#endif
#ifdef DEBUG_SERIAL_OPEN
- printk("Found 'su' at %016lx IRQ %d,%x\n", dev->base_address[0],
+ printk("Found 'su' at %016lx IRQ %s\n", dev->base_address[0],
__irq_itoa(dev->irqs[0]));
#endif
@@ -449,33 +2249,35 @@
* 0x80 is a non-existent port; which should be safe since
* include/asm/io.h also makes this assumption.
*/
- scratch = su_inb(info, UART_IER);
+ scratch = serial_in(info, UART_IER);
su_outb(info, UART_IER, 0);
- scratch2 = su_inb(info, UART_IER);
+ scratch2 = serial_in(info, UART_IER);
su_outb(info, UART_IER, scratch);
if (scratch2) {
restore_flags(flags);
return; /* We failed; there's nothing here */
}
- scratch = su_inb(info, UART_MCR);
+#if 0 /* P3 You will never beleive but SuperIO fails this test in MrCoffee. */
+ scratch = serial_in(info, UART_MCR);
su_outb(info, UART_MCR, UART_MCR_LOOP | scratch);
- scratch2 = su_inb(info, UART_MSR);
+ scratch2 = serial_in(info, UART_MSR);
su_outb(info, UART_MCR, UART_MCR_LOOP | 0x0A);
- status1 = su_inb(info, UART_MSR) & 0xF0;
+ status1 = serial_in(info, UART_MSR) & 0xF0;
su_outb(info, UART_MCR, scratch);
su_outb(info, UART_MSR, scratch2);
if (status1 != 0x90) {
restore_flags(flags);
return;
}
+#endif
- scratch2 = su_inb(info, UART_LCR);
+ scratch2 = serial_in(info, UART_LCR);
su_outb(info, UART_LCR, 0xBF); /* set up for StarTech test */
su_outb(info, UART_EFR, 0); /* EFR is the same as FCR */
su_outb(info, UART_LCR, 0);
su_outb(info, UART_FCR, UART_FCR_ENABLE_FIFO);
- scratch = su_inb(info, UART_IIR) >> 6;
+ scratch = serial_in(info, UART_IIR) >> 6;
switch (scratch) {
case 0:
info->type = PORT_16450;
@@ -528,21 +2330,27 @@
if ((status1 != 0xa5) || (status2 != 0x5a))
info->type = PORT_8250;
}
+ info->xmit_fifo_size = uart_config[info->type].dfl_xmit_fifo_size;
if (info->type == PORT_UNKNOWN) {
restore_flags(flags);
return;
}
- sprintf(info->name, "su(%s)", info->ms_node ? "mouse" : "kbd");
+ if (info->kbd_node || info->ms_node)
+ sprintf(info->name, "su(%s)", info->ms_node ? "mouse" : "kbd");
+ else
+ strcpy(info->name, "su(serial)");
+
+#ifdef __sparc_v9__
request_region(info->port, 8, info->name);
+#endif
/*
* Reset the UART.
*/
su_outb(info, UART_MCR, 0x00);
- su_outb(info, UART_FCR, (UART_FCR_CLEAR_RCVR |
- UART_FCR_CLEAR_XMIT));
+ su_outb(info, UART_FCR, (UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT));
su_inb(info, UART_RX);
restore_flags(flags);
@@ -551,19 +2359,117 @@
/*
* The serial driver boot-time initialization code!
*/
-__initfunc(int su_init(void))
+__initfunc(int su_serial_init(void))
{
int i;
struct su_struct *info;
-
+
+ init_bh(SERIAL_BH, do_serial_bh);
show_su_version();
+ /* Initialize the tty_driver structure */
+
+ memset(&serial_driver, 0, sizeof(struct tty_driver));
+ serial_driver.magic = TTY_DRIVER_MAGIC;
+ serial_driver.driver_name = "su";
+ 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 = su_open;
+ serial_driver.close = su_close;
+ serial_driver.write = su_write;
+ serial_driver.put_char = su_put_char;
+ serial_driver.flush_chars = su_flush_chars;
+ serial_driver.write_room = su_write_room;
+ serial_driver.chars_in_buffer = su_chars_in_buffer;
+ serial_driver.flush_buffer = su_flush_buffer;
+ serial_driver.ioctl = su_ioctl;
+ serial_driver.throttle = su_throttle;
+ serial_driver.unthrottle = su_unthrottle;
+ serial_driver.send_xchar = su_send_xchar;
+ serial_driver.set_termios = su_set_termios;
+ serial_driver.stop = su_stop;
+ serial_driver.start = su_start;
+ serial_driver.hangup = su_hangup;
+ serial_driver.break_ctl = su_break;
+ serial_driver.wait_until_sent = su_wait_until_sent;
+ serial_driver.read_proc = su_read_proc;
+
+ /*
+ * 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;
+ callout_driver.proc_entry = 0;
+
+ if (tty_register_driver(&serial_driver))
+ panic("Couldn't register regular su\n");
+ if (tty_register_driver(&callout_driver))
+ panic("Couldn't register callout su\n");
+
for (i = 0, info = su_table; i < NR_PORTS; i++, info++) {
info->line = i;
+ info->type = PORT_UNKNOWN;
+ info->baud_base = BAUD_BASE;
+ /* info->flags = 0; */
+ info->custom_divisor = 0;
+ info->close_delay = 5*HZ/10;
+ info->closing_wait = 30*HZ;
+ info->callout_termios = callout_driver.init_termios;
+ info->normal_termios = serial_driver.init_termios;
+ info->icount.cts = info->icount.dsr =
+ 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->tqueue.routine = do_softint;
+ info->tqueue.data = info;
+ info->cflag = serial_driver.init_termios.c_cflag;
+
+ autoconfig(info);
+ if (info->type == PORT_UNKNOWN)
+ continue;
+
+ printk(KERN_INFO "%s at %16lx (irq = %s) is a %s\n",
+ info->name, info->port, __irq_itoa(info->irq),
+ uart_config[info->type].name);
+ }
+
+ return 0;
+}
+
+__initfunc(int su_kbd_ms_init(void))
+{
+ int i;
+ struct su_struct *info;
+
+ show_su_version();
+
+ for (i = 0, info = su_table; i < 2; i++, info++) {
+ info->line = i;
+ info->type = PORT_UNKNOWN;
+ info->baud_base = BAUD_BASE;
+
if (info->kbd_node)
- info->cflag = B1200 | CS8 | CREAD;
+ info->cflag = B1200 | CS8 | CLOCAL | CREAD;
else
- info->cflag = B4800 | CS8 | CREAD;
+ info->cflag = B4800 | CS8 | CLOCAL | CREAD;
autoconfig(info);
if (info->type == PORT_UNKNOWN)
@@ -575,7 +2481,7 @@
startup(info);
if (info->kbd_node)
- keyboard_zsinit(su_put_char);
+ keyboard_zsinit(su_put_char_kbd);
else
sun_mouse_zsinit();
}
@@ -592,6 +2498,33 @@
int len;
/*
+ * Find su on MrCoffee. We return OK code if find any.
+ * Then su_init finds every one and initializes them.
+ * We do this early because MrCoffee got no aliases.
+ */
+ node = prom_getchild(prom_root_node);
+ if ((node = prom_searchsiblings(node, "obio")) != 0) {
+ if ((sunode = prom_getchild(node)) != 0) {
+ if ((sunode = prom_searchsiblings(sunode, "su")) != 0) {
+ info->port_node = sunode;
+#ifdef CONFIG_SERIAL_CONSOLE
+ /*
+ * Console must be initiated after the generic
+ * initialization.
+ * sunserial_setinitfunc inverts order, so
+ * call this before next one.
+ */
+ sunserial_setinitfunc(memory_start,
+ su_serial_console_init);
+#endif
+ sunserial_setinitfunc(memory_start,
+ su_serial_init);
+ return 0;
+ }
+ }
+ }
+
+ /*
* Get the nodes for keyboard and mouse from 'aliases'...
*/
node = prom_getchild(prom_root_node);
@@ -619,7 +2552,9 @@
* Find matching EBus nodes...
*/
node = prom_getchild(prom_root_node);
- node = prom_searchsiblings(node, "pci");
+ if ((node = prom_searchsiblings(node, "pci")) == 0) {
+ return -ENODEV; /* Plain sparc */
+ }
/*
* Check for SUNW,sabre on Ultra 5/10/AXi.
@@ -668,7 +2603,7 @@
/*
* Found everything we need?
*/
- if (devices == NR_PORTS)
+ if (devices == 2)
goto found;
sunode = prom_getsibling(sunode);
@@ -687,7 +2622,7 @@
return -ENODEV;
found:
- sunserial_setinitfunc(memory_start, su_init);
+ sunserial_setinitfunc(memory_start, su_kbd_ms_init);
rs_ops.rs_change_mouse_baud = su_change_mouse_baud;
sunkbd_setinitfunc(memory_start, sun_kbd_init);
kbd_ops.compute_shiftstate = sun_compute_shiftstate;
@@ -695,9 +2630,266 @@
kbd_ops.getledstate = sun_getledstate;
kbd_ops.setkeycode = sun_setkeycode;
kbd_ops.getkeycode = sun_getkeycode;
+#ifdef CONFIG_PCI
sunkbd_install_keymaps(memory_start, sun_key_maps, sun_keymap_count,
sun_func_buf, sun_func_table,
sun_funcbufsize, sun_funcbufleft,
sun_accent_table, sun_accent_table_size);
+#endif
+ return 0;
+}
+
+/*
+ * ------------------------------------------------------------
+ * Serial console driver
+ * ------------------------------------------------------------
+ */
+#ifdef CONFIG_SERIAL_CONSOLE
+
+#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
+
+/*
+ * Wait for transmitter & holding register to empty
+ */
+static __inline__ void
+wait_for_xmitr(struct su_struct *info)
+{
+ int lsr;
+ unsigned int tmout = 1000000;
+
+ do {
+ lsr = su_inb(info, UART_LSR);
+ if (--tmout == 0)
+ break;
+ } while ((lsr & BOTH_EMPTY) != BOTH_EMPTY);
+}
+
+/*
+ * 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 *co, const char *s,
+ unsigned count)
+{
+ struct su_struct *info;
+ int ier;
+ unsigned i;
+
+ info = su_table + co->index;
+ /*
+ * First save the IER then disable the interrupts
+ */
+ ier = su_inb(info, UART_IER);
+ su_outb(info, UART_IER, 0x00);
+
+ /*
+ * Now, do each character
+ */
+ for (i = 0; i < count; i++, s++) {
+ wait_for_xmitr(info);
+
+ /*
+ * Send the character out.
+ * If a LF, also do CR...
+ */
+ su_outb(info, UART_TX, *s);
+ if (*s == 10) {
+ wait_for_xmitr(info);
+ su_outb(info, UART_TX, 13);
+ }
+ }
+
+ /*
+ * Finally, Wait for transmitter & holding register to empty
+ * and restore the IER
+ */
+ wait_for_xmitr(info);
+ su_outb(info, UART_IER, ier);
+}
+
+/*
+ * Receive character from the serial port
+ */
+static int
+serial_console_wait_key(struct console *co)
+{
+ struct su_struct *info;
+ int ier;
+ int lsr;
+ int c;
+
+ info = su_table + co->index;
+
+ /*
+ * First save the IER then disable the interrupts so
+ * that the real driver for the port does not get the
+ * character.
+ */
+ ier = su_inb(info, UART_IER);
+ su_outb(info, UART_IER, 0x00);
+
+ do {
+ lsr = su_inb(info, UART_LSR);
+ } while (!(lsr & UART_LSR_DR));
+ c = su_inb(info, UART_RX);
+
+ /*
+ * Restore the interrupts
+ */
+ su_outb(info, UART_IER, ier);
+
+ return c;
+}
+
+static kdev_t
+serial_console_device(struct console *c)
+{
+ return MKDEV(TTY_MAJOR, 64 + c->index);
+}
+
+/*
+ * Setup initial baud/bits/parity. We do two things here:
+ * - construct a cflag setting for the first su_open()
+ * - initialize the serial port
+ * Return non-zero if we didn't find a serial port.
+ */
+__initfunc(static int serial_console_setup(struct console *co, char *options))
+{
+ struct su_struct *info;
+ unsigned cval;
+ int baud = 9600;
+ int bits = 8;
+ int parity = 'n';
+ int cflag = CREAD | HUPCL | CLOCAL;
+ int quot = 0;
+ char *s;
+
+ 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 115200:
+ cflag |= B115200;
+ break;
+ case 9600:
+ default:
+ cflag |= B9600;
+ break;
+ }
+ switch(bits) {
+ case 7:
+ cflag |= CS7;
+ break;
+ default:
+ case 8:
+ cflag |= CS8;
+ break;
+ }
+ switch(parity) {
+ case 'o': case 'O':
+ cflag |= PARODD;
+ break;
+ case 'e': case 'E':
+ cflag |= PARENB;
+ break;
+ }
+ co->cflag = cflag;
+
+ /*
+ * Divisor, bytesize and parity
+ */
+ info = su_table + co->index;
+ quot = BAUD_BASE / baud;
+ cval = cflag & (CSIZE | CSTOPB);
+#if defined(__powerpc__) || defined(__alpha__)
+ cval >>= 8;
+#else /* !__powerpc__ && !__alpha__ */
+ cval >>= 4;
+#endif /* !__powerpc__ && !__alpha__ */
+ if (cflag & PARENB)
+ cval |= UART_LCR_PARITY;
+ if (!(cflag & PARODD))
+ cval |= UART_LCR_EPAR;
+
+ /*
+ * Disable UART interrupts, set DTR and RTS high
+ * and set speed.
+ */
+ su_outb(info, UART_IER, 0);
+ su_outb(info, UART_MCR, UART_MCR_DTR | UART_MCR_RTS);
+ su_outb(info, UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */
+ su_outb(info, UART_DLL, quot & 0xff); /* LS of divisor */
+ su_outb(info, UART_DLM, quot >> 8); /* MS of divisor */
+ su_outb(info, UART_LCR, cval); /* reset DLAB */
+ info->quot = quot;
+
+ /*
+ * If we read 0xff from the LSR, there is no UART here.
+ */
+ if (su_inb(info, UART_LSR) == 0xff)
+ return -1;
+
+ return 0;
+}
+
+static struct console sercons = {
+ "ttyS",
+ serial_console_write,
+ NULL,
+ serial_console_device,
+ serial_console_wait_key,
+ NULL,
+ serial_console_setup,
+ CON_PRINTBUFFER,
+ -1,
+ 0,
+ NULL
+};
+
+/*
+ * Register console.
+ */
+__initfunc(int su_serial_console_init(void))
+{
+ extern int con_is_present(void);
+
+ if (con_is_present())
+ return 0;
+ if (serial_console == 0)
+ return 0;
+ if (su_table[0].port == 0 || su_table[0].port_node == 0)
+ return 0;
+ sercons.index = 0;
+ register_console(&sercons);
return 0;
}
+
+#endif /* CONFIG_SERIAL_CONSOLE */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov