patch-2.1.53 linux/drivers/sbus/char/sunserial.c
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- Lines: 2741
- Date:
Thu Sep 4 12:54:49 1997
- Orig file:
v2.1.52/linux/drivers/sbus/char/sunserial.c
- Orig date:
Mon Jul 7 08:18:55 1997
diff -u --recursive --new-file v2.1.52/linux/drivers/sbus/char/sunserial.c linux/drivers/sbus/char/sunserial.c
@@ -1,2668 +1,134 @@
-/* $Id: sunserial.c,v 1.43 1997/07/05 09:53:23 davem Exp $
- * serial.c: Serial port driver for the Sparc.
+/* $Id: sunserial.c,v 1.50 1997/09/03 11:54:59 ecd Exp $
+ * serial.c: Serial port driver infrastructure for the Sparc.
*
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1996 Eddie C. Dost (ecd@skynet.be)
- * Fixes by Pete A. Zaitcev <zaitcev@ipmce.su>.
+ * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
*/
+#include <linux/config.h>
+#include <linux/module.h>
#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/config.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/kernel.h>
-#include <linux/keyboard.h>
-#include <linux/console.h>
-#include <linux/init.h>
+#include <linux/serial.h>
-#include <asm/io.h>
-#include <asm/irq.h>
#include <asm/oplib.h>
-#include <asm/system.h>
-#include <asm/uaccess.h>
-#include <asm/bitops.h>
-#include <asm/delay.h>
-#include <asm/kdebug.h>
#include "sunserial.h"
-static int num_serial = 2; /* sun4/sun4c/sun4m - Two chips on board. */
-#define NUM_SERIAL num_serial
-#define NUM_CHANNELS (NUM_SERIAL * 2)
-
-#define KEYBOARD_LINE 0x2
-#define MOUSE_LINE 0x3
-
-struct sun_zslayout **zs_chips;
-struct sun_zschannel **zs_channels;
-struct sun_zschannel *zs_conschan;
-struct sun_zschannel *zs_mousechan;
-struct sun_zschannel *zs_kbdchan;
-struct sun_zschannel *zs_kgdbchan;
-int *zs_nodes;
-
-struct sun_serial *zs_soft;
-struct sun_serial *zs_chain; /* IRQ servicing chain */
-int zilog_irq;
-
-struct tty_struct *zs_ttys;
-/** struct tty_struct *zs_constty; **/
-
-/* Console hooks... */
-static int zs_cons_chanout = 0;
-static int zs_cons_chanin = 0;
-static struct l1a_kbd_state l1a_state = { 0, 0 };
-struct sun_serial *zs_consinfo = 0;
-
-/* Keyboard defines for L1-A processing... */
-#define SUNKBD_RESET 0xff
-#define SUNKBD_L1 0x01
-#define SUNKBD_UP 0x80
-#define SUNKBD_A 0x4d
-
-extern void sunkbd_inchar(unsigned char ch, struct pt_regs *regs);
-extern void sun_mouse_inbyte(unsigned char byte);
-
-static unsigned char kgdb_regs[16] = {
- 0, 0, 0, /* write 0, 1, 2 */
- (Rx8 | RxENAB), /* write 3 */
- (X16CLK | SB1 | PAR_EVEN), /* write 4 */
- (DTR | Tx8 | TxENAB), /* write 5 */
- 0, 0, 0, /* write 6, 7, 8 */
- (NV), /* write 9 */
- (NRZ), /* write 10 */
- (TCBR | RCBR), /* write 11 */
- 0, 0, /* BRG time constant, write 12 + 13 */
- (BRSRC | BRENAB), /* write 14 */
- (DCDIE) /* write 15 */
-};
-
-static unsigned char zscons_regs[16] = {
- 0, /* write 0 */
- (EXT_INT_ENAB | INT_ALL_Rx), /* write 1 */
- 0, /* write 2 */
- (Rx8 | RxENAB), /* write 3 */
- (X16CLK), /* write 4 */
- (DTR | Tx8 | TxENAB), /* write 5 */
- 0, 0, 0, /* write 6, 7, 8 */
- (NV | MIE), /* write 9 */
- (NRZ), /* write 10 */
- (TCBR | RCBR), /* write 11 */
- 0, 0, /* BRG time constant, write 12 + 13 */
- (BRSRC | BRENAB), /* write 14 */
- (DCDIE | CTSIE | TxUIE | BRKIE) /* write 15 */
-};
-
-#define ZS_CLOCK 4915200 /* Zilog input clock rate */
-
-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
-
-/* Debugging... DEBUG_INTR is bad to use when one of the zs
- * lines is your console ;(
- */
-#undef SERIAL_DEBUG_INTR
-#undef SERIAL_DEBUG_OPEN
-#undef SERIAL_DEBUG_FLOW
-
-#define RS_STROBE_TIME 10
-#define RS_ISR_PASS_LIMIT 256
-
-#define _INLINE_ inline
-
-static void change_speed(struct sun_serial *info);
-
-static struct tty_struct **serial_table;
-static struct termios **serial_termios;
-static struct termios **serial_termios_locked;
-
-#ifndef MIN
-#define MIN(a,b) ((a) < (b) ? (a) : (b))
-#endif
-
-/*
- * tmp_buf is used as a temporary buffer by serial_write. We need to
- * lock it in case the memcpy_fromfs 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[4096]; /* This is cheating */
-static struct semaphore tmp_buf_sem = MUTEX;
-
-static inline int serial_paranoia_check(struct sun_serial *info,
- dev_t device, const char *routine)
-{
-#ifdef SERIAL_PARANOIA_CHECK
- static const char *badmagic =
- "Warning: bad magic number for serial struct (%d, %d) in %s\n";
- static const char *badinfo =
- "Warning: null sun_serial for (%d, %d) in %s\n";
-
- if (!info) {
- printk(badinfo, MAJOR(device), MINOR(device), routine);
- return 1;
- }
- if (info->magic != SERIAL_MAGIC) {
- printk(badmagic, MAJOR(device), MINOR(device), routine);
- return 1;
- }
-#endif
- return 0;
-}
-
-/*
- * This is used to figure out the divisor speeds and the timeouts
- */
-static int baud_table[] = {
- 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
- 9600, 19200, 38400, 76800, 0 };
-
-/*
- * Reading and writing Zilog8530 registers. The delays are to make this
- * driver work on the Sun4 which needs a settling delay after each chip
- * register access, other machines handle this in hardware via auxiliary
- * flip-flops which implement the settle time we do in software.
- */
-static inline unsigned char read_zsreg(struct sun_zschannel *channel,
- unsigned char reg)
-{
- unsigned char retval;
-
- channel->control = reg;
- udelay(5);
- retval = channel->control;
- udelay(5);
- return retval;
-}
-
-static inline void write_zsreg(struct sun_zschannel *channel,
- unsigned char reg, unsigned char value)
-{
- channel->control = reg;
- udelay(5);
- channel->control = value;
- udelay(5);
-}
-
-static inline void load_zsregs(struct sun_serial *info, unsigned char *regs)
-{
- unsigned long flags;
- struct sun_zschannel *channel = info->zs_channel;
- unsigned char stat;
- int i;
-
- for (i = 0; i < 1000; i++) {
- stat = read_zsreg(channel, R1);
- if (stat & ALL_SNT)
- break;
- udelay(100);
- }
- write_zsreg(channel, R3, 0);
- ZS_CLEARSTAT(channel);
- ZS_CLEARERR(channel);
- ZS_CLEARFIFO(channel);
-
- /* Load 'em up */
- save_flags(flags); cli();
- if (info->channelA)
- write_zsreg(channel, R9, CHRA);
- else
- write_zsreg(channel, R9, CHRB);
- udelay(20); /* wait for some old sun4's */
- write_zsreg(channel, R4, regs[R4]);
- write_zsreg(channel, R3, regs[R3] & ~RxENAB);
- write_zsreg(channel, R5, regs[R5] & ~TxENAB);
- write_zsreg(channel, R9, regs[R9] & ~MIE);
- write_zsreg(channel, R10, regs[R10]);
- write_zsreg(channel, R11, regs[R11]);
- write_zsreg(channel, R12, regs[R12]);
- write_zsreg(channel, R13, regs[R13]);
- write_zsreg(channel, R14, regs[R14] & ~BRENAB);
- write_zsreg(channel, R14, regs[R14]);
- write_zsreg(channel, R14, (regs[R14] & ~SNRZI) | BRENAB);
- write_zsreg(channel, R3, regs[R3]);
- write_zsreg(channel, R5, regs[R5]);
- write_zsreg(channel, R15, regs[R15]);
- write_zsreg(channel, R0, RES_EXT_INT);
- write_zsreg(channel, R0, ERR_RES);
- write_zsreg(channel, R1, regs[R1]);
- write_zsreg(channel, R9, regs[R9]);
- restore_flags(flags);
-}
-
-static inline void zs_put_char(struct sun_zschannel *channel, char ch)
-{
- int loops = 0;
-
- while((channel->control & Tx_BUF_EMP) == 0 && loops < 10000) {
- loops++;
- udelay(5);
- }
- channel->data = ch;
- udelay(5);
-}
-
-/* Sets or clears DTR/RTS on the requested line */
-static inline void zs_rtsdtr(struct sun_serial *ss, int set)
-{
- unsigned long flags;
-
- save_flags(flags); cli();
- if(set) {
- ss->curregs[5] |= (RTS | DTR);
- write_zsreg(ss->zs_channel, 5, ss->curregs[5]);
- } else {
- ss->curregs[5] &= ~(RTS | DTR);
- write_zsreg(ss->zs_channel, 5, ss->curregs[5]);
- }
- restore_flags(flags);
- return;
-}
-
-static inline void kgdb_chaninit(struct sun_serial *ss, int intson, int bps)
-{
- int brg;
-
- if(intson) {
- kgdb_regs[R1] = INT_ALL_Rx;
- kgdb_regs[R9] |= MIE;
- } else {
- kgdb_regs[R1] = 0;
- kgdb_regs[R9] &= ~MIE;
- }
- brg = BPS_TO_BRG(bps, ZS_CLOCK/16);
- kgdb_regs[R12] = (brg & 255);
- kgdb_regs[R13] = ((brg >> 8) & 255);
- load_zsregs(ss, kgdb_regs);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_stop() and rs_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * They enable or disable transmitter interrupts, as necessary.
- * ------------------------------------------------------------
- */
-static void rs_stop(struct tty_struct *tty)
-{
- struct sun_serial *info = (struct sun_serial *)tty->driver_data;
- unsigned long flags;
-
- if (serial_paranoia_check(info, tty->device, "rs_stop"))
- return;
-
- save_flags(flags); cli();
- if (info->curregs[5] & TxENAB) {
- info->curregs[5] &= ~TxENAB;
- write_zsreg(info->zs_channel, 5, info->curregs[5]);
- }
- restore_flags(flags);
-}
-
-static void rs_start(struct tty_struct *tty)
-{
- struct sun_serial *info = (struct sun_serial *)tty->driver_data;
- unsigned long flags;
-
- if (serial_paranoia_check(info, tty->device, "rs_start"))
- return;
-
- save_flags(flags); cli();
- if (info->xmit_cnt && info->xmit_buf && !(info->curregs[5] & TxENAB)) {
- info->curregs[5] |= TxENAB;
- write_zsreg(info->zs_channel, 5, info->curregs[5]);
- }
- restore_flags(flags);
-}
-
-/* Drop into either the boot monitor or kadb upon receiving a break
- * from keyboard/console input.
- */
-static void batten_down_hatches(void)
-{
- /* If we are doing kadb, we call the debugger
- * else we just drop into the boot monitor.
- * Note that we must flush the user windows
- * first before giving up control.
- */
- printk("\n");
- flush_user_windows();
-#ifndef __sparc_v9__
- if((((unsigned long)linux_dbvec)>=DEBUG_FIRSTVADDR) &&
- (((unsigned long)linux_dbvec)<=DEBUG_LASTVADDR))
- sp_enter_debugger();
- else
-#endif
- prom_cmdline();
-
- /* XXX We want to notify the keyboard driver that all
- * XXX keys are in the up state or else weird things
- * XXX happen...
- */
-
- return;
-}
-
-
-/*
- * ----------------------------------------------------------------------
- *
- * Here starts the interrupt handling routines. All of the following
- * subroutines are declared as inline and are folded into
- * rs_interrupt(). They were separated out for readability's sake.
- *
- * Note: rs_interrupt() is a "fast" interrupt, which means that it
- * runs with interrupts turned off. People who may want to modify
- * rs_interrupt() should try to keep the interrupt handler as fast as
- * possible. After you are done making modifications, it is not a bad
- * idea to do:
- *
- * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
- *
- * and look at the resulting assemble code in serial.s.
- *
- * - Ted Ts'o (tytso@mit.edu), 7-Mar-93
- * -----------------------------------------------------------------------
- */
-
-/*
- * This routine is used by the interrupt handler to schedule
- * processing in the software interrupt portion of the driver.
- */
-static _INLINE_ void rs_sched_event(struct sun_serial *info,
- int event)
-{
- info->event |= 1 << event;
- queue_task(&info->tqueue, &tq_serial);
- mark_bh(SERIAL_BH);
-}
-
-#ifndef __sparc_v9__
-extern void breakpoint(void); /* For the KGDB frame character */
-#endif
-
-static _INLINE_ void receive_chars(struct sun_serial *info, struct pt_regs *regs)
-{
- struct tty_struct *tty = info->tty;
- unsigned char ch, stat;
-
- do {
- ch = (info->zs_channel->data) & info->parity_mask;
- udelay(5);
-
- /* If this is the console keyboard, we need to handle
- * L1-A's here.
- */
- if(info->cons_keyb) {
- if(ch == SUNKBD_RESET) {
- l1a_state.kbd_id = 1;
- l1a_state.l1_down = 0;
- } else if(l1a_state.kbd_id) {
- l1a_state.kbd_id = 0;
- } else if(ch == SUNKBD_L1) {
- l1a_state.l1_down = 1;
- } else if(ch == (SUNKBD_L1|SUNKBD_UP)) {
- l1a_state.l1_down = 0;
- } else if(ch == SUNKBD_A && l1a_state.l1_down) {
- /* whee... */
- batten_down_hatches();
- /* Continue execution... */
- l1a_state.l1_down = 0;
- l1a_state.kbd_id = 0;
- return;
- }
- sunkbd_inchar(ch, regs);
- return;
- }
- if(info->cons_mouse) {
- sun_mouse_inbyte(ch);
- return;
- }
- if(info->is_cons) {
- if(ch==0) {
- /* whee, break received */
- batten_down_hatches();
- /* Continue execution... */
- return;
-#if 0
- } else if (ch == 1) {
- show_state();
- return;
- } else if (ch == 2) {
- show_buffers();
- return;
-#endif
- }
- /* It is a 'keyboard interrupt' ;-) */
- wake_up(&keypress_wait);
- }
-#ifndef __sparc_v9__
- /* Look for kgdb 'stop' character, consult the gdb
- * documentation for remote target debugging and
- * arch/sparc/kernel/sparc-stub.c to see how all this works.
- */
- if((info->kgdb_channel) && (ch =='\003')) {
- breakpoint();
- return;
- }
-#endif
- if(!tty)
- return;
-
- if (tty->flip.count >= TTY_FLIPBUF_SIZE)
- break;
-
- tty->flip.count++;
- *tty->flip.flag_buf_ptr++ = 0;
- *tty->flip.char_buf_ptr++ = ch;
-
- /* Check if we have another character... */
- stat = info->zs_channel->control;
- udelay(5);
- if (!(stat & Rx_CH_AV))
- break;
-
- /* ... and see if it is clean. */
- stat = read_zsreg(info->zs_channel, R1);
- } while (!(stat & (PAR_ERR | Rx_OVR | CRC_ERR)));
-
- queue_task(&tty->flip.tqueue, &tq_timer);
-}
-
-static _INLINE_ void transmit_chars(struct sun_serial *info)
-{
- struct tty_struct *tty = info->tty;
-
- if (info->x_char) {
- /* Send next char */
- zs_put_char(info->zs_channel, info->x_char);
- info->x_char = 0;
- return;
- }
-
- if((info->xmit_cnt <= 0) || (tty != 0 && tty->stopped)) {
- /* That's peculiar... */
- info->zs_channel->control = RES_Tx_P;
- udelay(5);
- return;
- }
-
- /* Send char */
- zs_put_char(info->zs_channel, info->xmit_buf[info->xmit_tail++]);
- info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
- info->xmit_cnt--;
-
- if (info->xmit_cnt < WAKEUP_CHARS)
- rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
-
- if(info->xmit_cnt <= 0) {
- info->zs_channel->control = RES_Tx_P;
- udelay(5);
- }
-}
-
-static _INLINE_ void status_handle(struct sun_serial *info)
+static void nop_rs_cons_hook(int chip, int out, int line)
{
- unsigned char status;
-
- /* Get status from Read Register 0 */
- status = info->zs_channel->control;
- udelay(5);
- /* Clear status condition... */
- info->zs_channel->control = RES_EXT_INT;
- udelay(5);
-
-#if 0
- if(status & DCD) {
- if((info->tty->termios->c_cflag & CRTSCTS) &&
- ((info->curregs[3] & AUTO_ENAB)==0)) {
- info->curregs[3] |= AUTO_ENAB;
- write_zsreg(info->zs_channel, 3, info->curregs[3]);
- }
- } else {
- if((info->curregs[3] & AUTO_ENAB)) {
- info->curregs[3] &= ~AUTO_ENAB;
- write_zsreg(info->zs_channel, 3, info->curregs[3]);
- }
- }
-#endif
- /* Whee, if this is console input and this is a
- * 'break asserted' status change interrupt, call
- * the boot prom.
- */
- if((status & BRK_ABRT) && info->break_abort)
- batten_down_hatches();
-
- /* XXX Whee, put in a buffer somewhere, the status information
- * XXX whee whee whee... Where does the information go...
- */
- return;
-}
-
-static _INLINE_ void special_receive(struct sun_serial *info)
-{
- struct tty_struct *tty = info->tty;
- unsigned char ch, stat;
-
- stat = read_zsreg(info->zs_channel, R1);
- if (stat & (PAR_ERR | Rx_OVR | CRC_ERR)) {
- ch = info->zs_channel->data;
- udelay(5);
- }
-
- if (!tty)
- goto clear;
-
- if (tty->flip.count >= TTY_FLIPBUF_SIZE)
- goto done;
-
- tty->flip.count++;
- if(stat & PAR_ERR)
- *tty->flip.flag_buf_ptr++ = TTY_PARITY;
- else if(stat & Rx_OVR)
- *tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
- else if(stat & CRC_ERR)
- *tty->flip.flag_buf_ptr++ = TTY_FRAME;
-
-done:
- queue_task(&tty->flip.tqueue, &tq_timer);
-clear:
- info->zs_channel->control = ERR_RES;
- udelay(5);
-}
-
-
-/*
- * This is the serial driver's generic interrupt routine
- */
-void rs_interrupt(int irq, void *dev_id, struct pt_regs * regs)
-{
- struct sun_serial *info;
- unsigned char zs_intreg;
- int i;
-
- info = (struct sun_serial *)dev_id;
- for (i = 0; i < NUM_SERIAL; i++) {
- zs_intreg = read_zsreg(info->zs_next->zs_channel, 2);
- zs_intreg &= STATUS_MASK;
-
- /* NOTE: The read register 2, which holds the irq status,
- * does so for both channels on each chip. Although
- * the status value itself must be read from the B
- * channel and is only valid when read from channel B.
- * When read from channel A, read register 2 contains
- * the value written to write register 2.
- */
-
- /* Channel A -- /dev/ttya or /dev/kbd, could be the console */
- if (zs_intreg == CHA_Rx_AVAIL) {
- receive_chars(info, regs);
- return;
- }
- if(zs_intreg == CHA_Tx_EMPTY) {
- transmit_chars(info);
- return;
- }
- if (zs_intreg == CHA_EXT_STAT) {
- status_handle(info);
- return;
- }
- if (zs_intreg == CHA_SPECIAL) {
- special_receive(info);
- return;
- }
-
- /* Channel B -- /dev/ttyb or /dev/mouse, could be the console */
- if(zs_intreg == CHB_Rx_AVAIL) {
- receive_chars(info->zs_next, regs);
- return;
- }
- if(zs_intreg == CHB_Tx_EMPTY) {
- transmit_chars(info->zs_next);
- return;
- }
- if (zs_intreg == CHB_EXT_STAT) {
- status_handle(info->zs_next);
- return;
- }
-
- /* NOTE: The default value for the IRQ status in read register
- * 2 in channel B is CHB_SPECIAL, so we need to look at
- * read register 3 in channel A to check if this is a
- * real interrupt, or just the default value.
- * Yes... broken hardware...
- */
-
- zs_intreg = read_zsreg(info->zs_channel, 3);
- if (zs_intreg & CHBRxIP) {
- special_receive(info->zs_next);
- return;
- }
- info = info->zs_next->zs_next;
- }
-}
-
-/*
- * -------------------------------------------------------------------
- * Here ends the serial interrupt routines.
- * -------------------------------------------------------------------
- */
-
-/*
- * This routine is used to handle the "bottom half" processing for the
- * serial driver, known also the "software interrupt" processing.
- * This processing is done at the kernel interrupt level, after the
- * rs_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
- * is where time-consuming activities which can not be done in the
- * interrupt driver proper are done; the interrupt driver schedules
- * them using rs_sched_event(), and they get done here.
- */
-static void do_serial_bh(void)
-{
- run_task_queue(&tq_serial);
-}
-
-static void do_softint(void *private_)
-{
- struct sun_serial *info = (struct sun_serial *) 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);
- }
+ printk("Oops: %s called\n", __FUNCTION__);
}
-/*
- * This routine is called from the scheduler tqueue when the interrupt
- * routine has signalled that a hangup has occurred. The path of
- * hangup processing is:
- *
- * serial interrupt routine -> (scheduler tqueue) ->
- * do_serial_hangup() -> tty->hangup() -> rs_hangup()
- *
- */
-static void do_serial_hangup(void *private_)
+static void nop_rs_kgdb_hook(int channel)
{
- struct sun_serial *info = (struct sun_serial *) private_;
- struct tty_struct *tty;
-
- tty = info->tty;
- if (!tty)
- return;
-#ifdef SERIAL_DEBUG_OPEN
- printk("do_serial_hangup<%p: tty-%d\n",
- __builtin_return_address(0), info->line);
-#endif
-
- tty_hangup(tty);
+ printk("Oops: %s called\n", __FUNCTION__);
}
-
-/*
- * This subroutine is called when the RS_TIMER goes off. It is used
- * by the serial driver to handle ports that do not have an interrupt
- * (irq=0). This doesn't work at all for 16450's, as a sun has a Z8530.
- */
-
-static void rs_timer(void)
+static void nop_rs_change_mouse_baud(int baud)
{
- printk("rs_timer called\n");
- prom_halt();
- return;
+ printk("Oops: %s called\n", __FUNCTION__);
}
-static int startup(struct sun_serial * info)
+static int nop_rs_read_proc(char *page, char **start, off_t off, int count,
+ int *eof, void *data)
{
- unsigned long flags;
-
- if (info->flags & ZILOG_INITIALIZED)
- return 0;
-
- if (!info->xmit_buf) {
- info->xmit_buf = (unsigned char *) get_free_page(GFP_KERNEL);
- if (!info->xmit_buf)
- return -ENOMEM;
- }
-
- save_flags(flags); cli();
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("Starting up tty-%d (irq %d)...\n", info->line, info->irq);
-#endif
-
- /*
- * Clear the FIFO buffers and disable them
- * (they will be reenabled in change_speed())
- */
- ZS_CLEARFIFO(info->zs_channel);
- info->xmit_fifo_size = 1;
-
- /*
- * Clear the interrupt registers.
- */
- info->zs_channel->control = ERR_RES;
- udelay(5);
- info->zs_channel->control = RES_H_IUS;
- udelay(5);
-
- /*
- * Now, initialize the Zilog
- */
- zs_rtsdtr(info, 1);
-
- /*
- * Finally, enable sequencing and interrupts
- */
- info->curregs[1] |= (info->curregs[1] & ~(RxINT_MASK)) |
- (EXT_INT_ENAB | INT_ALL_Rx);
- info->curregs[3] |= (RxENAB | Rx8);
- /* We enable Tx interrupts as needed. */
- info->curregs[5] |= (TxENAB | Tx8);
- info->curregs[9] |= (NV | MIE);
- write_zsreg(info->zs_channel, 3, info->curregs[3]);
- write_zsreg(info->zs_channel, 5, info->curregs[5]);
- write_zsreg(info->zs_channel, 9, info->curregs[9]);
-
- /*
- * And clear the interrupt registers again for luck.
- */
- info->zs_channel->control = ERR_RES;
- udelay(5);
- info->zs_channel->control = RES_H_IUS;
- udelay(5);
-
- if (info->tty)
- clear_bit(TTY_IO_ERROR, &info->tty->flags);
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
-
- /*
- * Set up serial timers...
- */
-#if 0 /* Works well and stops the machine. */
- timer_table[RS_TIMER].expires = jiffies + 2;
- timer_active |= 1 << RS_TIMER;
-#endif
-
- /*
- * and set the speed of the serial port
- */
- change_speed(info);
-
- info->flags |= ZILOG_INITIALIZED;
- restore_flags(flags);
+ printk("Oops: %s called\n", __FUNCTION__);
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 sun_serial * info)
-{
- unsigned long flags;
-
- if (!(info->flags & ZILOG_INITIALIZED))
- return;
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("Shutting down serial port %d (irq %d)....", info->line,
- info->irq);
-#endif
-
- save_flags(flags); cli(); /* Disable interrupts */
-
- 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 &= ~ZILOG_INITIALIZED;
- restore_flags(flags);
-}
-
-/*
- * This routine is called to set the UART divisor registers to match
- * the specified baud rate for a serial port.
- */
-static void change_speed(struct sun_serial *info)
-{
- unsigned short port;
- unsigned cflag;
- int quot = 0;
- int i;
- int brg;
-
- if (!info->tty || !info->tty->termios)
- return;
- cflag = info->tty->termios->c_cflag;
- if (!(port = info->port))
- return;
- i = cflag & CBAUD;
- if (cflag & CBAUDEX) {
- i &= ~CBAUDEX;
- if (i != 5)
- info->tty->termios->c_cflag &= ~CBAUDEX;
- else
- i = 16;
- }
- if (i == 15) {
- if ((info->flags & ZILOG_SPD_MASK) == ZILOG_SPD_HI)
- i += 1;
- if ((info->flags & ZILOG_SPD_MASK) == ZILOG_SPD_CUST)
- quot = info->custom_divisor;
- }
- if (quot) {
- info->zs_baud = info->baud_base / quot;
- info->clk_divisor = 16;
-
- info->curregs[4] = X16CLK;
- info->curregs[11] = TCBR | RCBR;
- brg = BPS_TO_BRG(info->zs_baud, ZS_CLOCK/info->clk_divisor);
- info->curregs[12] = (brg & 255);
- info->curregs[13] = ((brg >> 8) & 255);
- info->curregs[14] = BRSRC | BRENAB;
- zs_rtsdtr(info, 1);
- } else if (baud_table[i]) {
- info->zs_baud = baud_table[i];
- info->clk_divisor = 16;
-
- info->curregs[4] = X16CLK;
- info->curregs[11] = TCBR | RCBR;
- brg = BPS_TO_BRG(info->zs_baud, ZS_CLOCK/info->clk_divisor);
- info->curregs[12] = (brg & 255);
- info->curregs[13] = ((brg >> 8) & 255);
- info->curregs[14] = BRSRC | BRENAB;
- zs_rtsdtr(info, 1);
- } else {
- zs_rtsdtr(info, 0);
- return;
- }
-
- /* byte size and parity */
- switch (cflag & CSIZE) {
- case CS5:
- info->curregs[3] &= ~(RxN_MASK);
- info->curregs[3] |= Rx5;
- info->curregs[5] &= ~(TxN_MASK);
- info->curregs[5] |= Tx5;
- info->parity_mask = 0x1f;
- break;
- case CS6:
- info->curregs[3] &= ~(RxN_MASK);
- info->curregs[3] |= Rx6;
- info->curregs[5] &= ~(TxN_MASK);
- info->curregs[5] |= Tx6;
- info->parity_mask = 0x3f;
- break;
- case CS7:
- info->curregs[3] &= ~(RxN_MASK);
- info->curregs[3] |= Rx7;
- info->curregs[5] &= ~(TxN_MASK);
- info->curregs[5] |= Tx7;
- info->parity_mask = 0x7f;
- break;
- case CS8:
- default: /* defaults to 8 bits */
- info->curregs[3] &= ~(RxN_MASK);
- info->curregs[3] |= Rx8;
- info->curregs[5] &= ~(TxN_MASK);
- info->curregs[5] |= Tx8;
- info->parity_mask = 0xff;
- break;
- }
- info->curregs[4] &= ~(0x0c);
- if (cflag & CSTOPB) {
- info->curregs[4] |= SB2;
- } else {
- info->curregs[4] |= SB1;
- }
- if (cflag & PARENB) {
- info->curregs[4] |= PAR_ENAB;
- } else {
- info->curregs[4] &= ~PAR_ENAB;
- }
- if (!(cflag & PARODD)) {
- info->curregs[4] |= PAR_EVEN;
- } else {
- info->curregs[4] &= ~PAR_EVEN;
- }
-
- /* Load up the new values */
- load_zsregs(info, info->curregs);
-
- return;
-}
-
-/* This is for mouse/keyboard output.
- * XXX mouse output??? can we send it commands??? XXX
- */
-void kbd_put_char(unsigned char ch)
-{
- struct sun_zschannel *chan = zs_kbdchan;
- unsigned long flags;
-
- if(!chan)
- return;
-
- save_flags(flags); cli();
- zs_put_char(chan, ch);
- restore_flags(flags);
-}
-
-void mouse_put_char(char ch)
-{
- struct sun_zschannel *chan = zs_mousechan;
- unsigned long flags;
-
- if(!chan)
- return;
-
- save_flags(flags); cli();
- zs_put_char(chan, ch);
- restore_flags(flags);
-}
-
-
-/* This is for console output over ttya/ttyb */
-static void rs_put_char(char ch)
-{
- struct sun_zschannel *chan = zs_conschan;
- unsigned long flags;
-
- if(!chan)
- return;
-
- save_flags(flags); cli();
- zs_put_char(chan, ch);
- restore_flags(flags);
-}
-
-/* These are for receiving and sending characters under the kgdb
- * source level kernel debugger.
- */
-void putDebugChar(char kgdb_char)
-{
- struct sun_zschannel *chan = zs_kgdbchan;
-
- while((chan->control & Tx_BUF_EMP)==0)
- udelay(5);
- chan->data = kgdb_char;
-}
-
-char getDebugChar(void)
-{
- struct sun_zschannel *chan = zs_kgdbchan;
-
- while((chan->control & Rx_CH_AV)==0)
- barrier();
- return chan->data;
-}
-
-/*
- * Fair output driver allows a process to speak.
- */
-static void rs_fair_output(void)
-{
- int left; /* Output no more than that */
- unsigned long flags;
- struct sun_serial *info = zs_consinfo;
- char c;
-
- if (info == 0) return;
- if (info->xmit_buf == 0) return;
-
- save_flags(flags); cli();
- left = info->xmit_cnt;
- while (left != 0) {
- c = info->xmit_buf[info->xmit_tail];
- info->xmit_tail = (info->xmit_tail+1) & (SERIAL_XMIT_SIZE-1);
- info->xmit_cnt--;
- restore_flags(flags);
-
- rs_put_char(c);
-
- cli();
- left = MIN(info->xmit_cnt, left-1);
- }
-
- /* Last character is being transmitted now (hopefully). */
- zs_conschan->control = RES_Tx_P;
- udelay(5);
-
- restore_flags(flags);
- return;
-}
-
-/*
- * zs_console_print is registered for printk.
- */
-static void zs_console_print(const char *s, unsigned count)
-{
- int i;
- for (i = 0; i < count; i++, s++) {
- if(*s == '\n')
- rs_put_char('\r');
- rs_put_char(*s);
- }
-
- /* Comment this if you want to have a strict interrupt-driven output */
- rs_fair_output();
-}
-
-static void zs_console_wait_key(void)
-{
- sleep_on(&keypress_wait);
-}
-
-static int zs_console_device(void)
-{
- extern int serial_console;
-
- return MKDEV(TTYAUX_MAJOR, 64 + serial_console - 1);
-}
-
-static void rs_flush_chars(struct tty_struct *tty)
-{
- struct sun_serial *info = (struct sun_serial *)tty->driver_data;
- unsigned long flags;
-
- 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;
-
- /* Enable transmitter */
- save_flags(flags); cli();
- info->curregs[1] |= TxINT_ENAB|EXT_INT_ENAB;
- write_zsreg(info->zs_channel, 1, info->curregs[1]);
- info->curregs[5] |= TxENAB;
- write_zsreg(info->zs_channel, 5, info->curregs[5]);
-
- /*
- * Send a first (bootstrapping) character. A best solution is
- * to call transmit_chars() here which handles output in a
- * generic way. Current transmit_chars() not only transmits,
- * but resets interrupts also what we do not desire here.
- * XXX Discuss with David.
- */
- zs_put_char(info->zs_channel, info->xmit_buf[info->xmit_tail++]);
- info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
- info->xmit_cnt--;
-
- restore_flags(flags);
-}
-
-static int rs_write(struct tty_struct * tty, int from_user,
- const unsigned char *buf, int count)
-{
- int c, total = 0;
- struct sun_serial *info = (struct sun_serial *)tty->driver_data;
- unsigned long flags;
-
- if (serial_paranoia_check(info, tty->device, "rs_write"))
- return 0;
-
- if (!info || !info->xmit_buf)
- return 0;
-
- 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) {
- down(&tmp_buf_sem);
- copy_from_user(tmp_buf, buf, c);
- 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);
- up(&tmp_buf_sem);
- } 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 (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
- /* Enable transmitter */
- info->curregs[1] |= TxINT_ENAB|EXT_INT_ENAB;
- write_zsreg(info->zs_channel, 1, info->curregs[1]);
- info->curregs[5] |= TxENAB;
- write_zsreg(info->zs_channel, 5, info->curregs[5]);
- }
-#if 1
- if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
- zs_put_char(info->zs_channel,
- info->xmit_buf[info->xmit_tail++]);
- info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
- info->xmit_cnt--;
- }
-#endif
- restore_flags(flags);
- return total;
-}
-
-static int rs_write_room(struct tty_struct *tty)
-{
- struct sun_serial *info = (struct sun_serial *)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 sun_serial *info = (struct sun_serial *)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 sun_serial *info = (struct sun_serial *)tty->driver_data;
-
- if (serial_paranoia_check(info, tty->device, "rs_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);
-}
-
-/*
- * ------------------------------------------------------------
- * 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 sun_serial *info = (struct sun_serial *)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);
-
- /* Turn off RTS line */
- cli();
- info->curregs[5] &= ~RTS;
- write_zsreg(info->zs_channel, 5, info->curregs[5]);
- sti();
-}
+struct sunserial_operations rs_ops = {
+ 0,
+ nop_rs_cons_hook,
+ nop_rs_kgdb_hook,
+ nop_rs_change_mouse_baud,
+ nop_rs_read_proc
+};
-static void rs_unthrottle(struct tty_struct * tty)
+int rs_init(void)
{
- struct sun_serial *info = (struct sun_serial *)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
+ struct rs_initfunc *init;
+ int err = -ENODEV;
- if (serial_paranoia_check(info, tty->device, "rs_unthrottle"))
- return;
-
- if (I_IXOFF(tty)) {
- if (info->x_char)
- info->x_char = 0;
- else
- info->x_char = START_CHAR(tty);
+ init = rs_ops.rs_init;
+ while (init) {
+ err = init->rs_init();
+ init = init->next;
}
-
- /* Assert RTS line */
- cli();
- info->curregs[5] |= RTS;
- write_zsreg(info->zs_channel, 5, info->curregs[5]);
- sti();
+ return err;
}
-/*
- * ------------------------------------------------------------
- * rs_ioctl() and friends
- * ------------------------------------------------------------
- */
-
-static int get_serial_info(struct sun_serial * info,
- struct serial_struct * retinfo)
+void rs_cons_hook(int chip, int out, int line)
{
- struct serial_struct tmp;
-
- if (!retinfo)
- return -EFAULT;
- memset(&tmp, 0, sizeof(tmp));
- tmp.type = info->type;
- tmp.line = info->line;
- tmp.port = info->port;
- tmp.irq = info->irq;
- 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;
- copy_to_user_ret(retinfo,&tmp,sizeof(*retinfo), -EFAULT);
- return 0;
+ rs_ops.rs_cons_hook(chip, out, line);
}
-static int set_serial_info(struct sun_serial * info,
- struct serial_struct * new_info)
-{
- struct serial_struct new_serial;
- struct sun_serial old_info;
- int retval = 0;
-
- if (!new_info || copy_from_user(&new_serial,new_info,sizeof(new_serial)))
- return -EFAULT;
- old_info = *info;
-
- if (!suser()) {
- if ((new_serial.baud_base != info->baud_base) ||
- (new_serial.type != info->type) ||
- (new_serial.close_delay != info->close_delay) ||
- ((new_serial.flags & ~ZILOG_USR_MASK) !=
- (info->flags & ~ZILOG_USR_MASK)))
- return -EPERM;
- info->flags = ((info->flags & ~ZILOG_USR_MASK) |
- (new_serial.flags & ZILOG_USR_MASK));
- info->custom_divisor = new_serial.custom_divisor;
- goto check_and_exit;
- }
-
- if (info->count > 1)
- return -EBUSY;
-
- /*
- * 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 & ~ZILOG_FLAGS) |
- (new_serial.flags & ZILOG_FLAGS));
- info->custom_divisor = new_serial.custom_divisor;
- info->type = new_serial.type;
- info->close_delay = new_serial.close_delay;
- info->closing_wait = new_serial.closing_wait;
-
-check_and_exit:
- retval = startup(info);
- return retval;
-}
-
-/*
- * 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 sun_serial * info, unsigned int *value)
+void rs_kgdb_hook(int channel)
{
- unsigned char status;
-
- cli();
- status = info->zs_channel->control;
- sti();
- put_user_ret(status,value, -EFAULT);
- return 0;
+ rs_ops.rs_kgdb_hook(channel);
}
-static int get_modem_info(struct sun_serial * info, unsigned int *value)
+void rs_change_mouse_baud(int baud)
{
- unsigned char status;
- unsigned int result;
-
- cli();
- status = info->zs_channel->control;
- sti();
- result = ((info->curregs[5] & RTS) ? TIOCM_RTS : 0)
- | ((info->curregs[5] & DTR) ? TIOCM_DTR : 0)
- | ((status & DCD) ? TIOCM_CAR : 0)
- | ((status & SYNC) ? TIOCM_DSR : 0)
- | ((status & CTS) ? TIOCM_CTS : 0);
- put_user_ret(result, value, -EFAULT);
- return 0;
+ rs_ops.rs_change_mouse_baud(baud);
}
-static int set_modem_info(struct sun_serial * info, unsigned int cmd,
- unsigned int *value)
+int rs_read_proc(char *page, char **start, off_t off, int count,
+ int *eof, void *data)
{
- unsigned int arg;
-
- get_user_ret(arg, value, -EFAULT);
- switch (cmd) {
- case TIOCMBIS:
- if (arg & TIOCM_RTS)
- info->curregs[5] |= RTS;
- if (arg & TIOCM_DTR)
- info->curregs[5] |= DTR;
- break;
- case TIOCMBIC:
- if (arg & TIOCM_RTS)
- info->curregs[5] &= ~RTS;
- if (arg & TIOCM_DTR)
- info->curregs[5] &= ~DTR;
- break;
- case TIOCMSET:
- info->curregs[5] = ((info->curregs[5] & ~(RTS | DTR))
- | ((arg & TIOCM_RTS) ? RTS : 0)
- | ((arg & TIOCM_DTR) ? DTR : 0));
- break;
- default:
- return -EINVAL;
- }
- cli();
- write_zsreg(info->zs_channel, 5, info->curregs[5]);
- sti();
- return 0;
+ return rs_ops.rs_read_proc(page, start, off, count, eof, data);
}
-/*
- * This routine sends a break character out the serial port.
- */
-static void send_break( struct sun_serial * info, int duration)
+int register_serial(struct serial_struct *req)
{
- if (!info->port)
- return;
- current->state = TASK_INTERRUPTIBLE;
- current->timeout = jiffies + duration;
- cli();
- write_zsreg(info->zs_channel, 5, (info->curregs[5] | SND_BRK));
- schedule();
- write_zsreg(info->zs_channel, 5, info->curregs[5]);
- sti();
+ return -1;
}
-static int rs_ioctl(struct tty_struct *tty, struct file * file,
- unsigned int cmd, unsigned long arg)
+void unregister_serial(int line)
{
- struct sun_serial * info = (struct sun_serial *)tty->driver_data;
- int retval;
-
- if (serial_paranoia_check(info, tty->device, "rs_ioctl"))
- return -ENODEV;
-
- if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
- (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) &&
- (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT)) {
- if (tty->flags & (1 << TTY_IO_ERROR))
- return -EIO;
- }
-
- switch (cmd) {
- case TCSBRK: /* SVID version: non-zero arg --> no break */
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- tty_wait_until_sent(tty, 0);
- if (!arg)
- send_break(info, HZ/4); /* 1/4 second */
- return 0;
- case TCSBRKP: /* support for POSIX tcsendbreak() */
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- tty_wait_until_sent(tty, 0);
- send_break(info, arg ? arg*(HZ/10) : HZ/4);
- return 0;
- case TIOCGSOFTCAR:
- put_user_ret(C_CLOCAL(tty) ? 1 : 0,
- (unsigned long *) arg, -EFAULT);
- return 0;
- case TIOCSSOFTCAR:
- get_user_ret(arg, (unsigned long *) arg, -EFAULT);
- tty->termios->c_cflag =
- ((tty->termios->c_cflag & ~CLOCAL) |
- (arg ? CLOCAL : 0));
- return 0;
- case TIOCMGET:
- return get_modem_info(info, (unsigned int *) arg);
- case TIOCMBIS:
- case TIOCMBIC:
- case TIOCMSET:
- return set_modem_info(info, cmd, (unsigned int *) arg);
- case TIOCGSERIAL:
- return get_serial_info(info,
- (struct serial_struct *) arg);
- case TIOCSSERIAL:
- return set_serial_info(info,
- (struct serial_struct *) arg);
- case TIOCSERGETLSR: /* Get line status register */
- return get_lsr_info(info, (unsigned int *) arg);
-
- case TIOCSERGSTRUCT:
- copy_to_user_ret((struct sun_serial *) arg,
- info, sizeof(struct sun_serial), -EFAULT);
- return 0;
-
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
}
-static void rs_set_termios(struct tty_struct *tty, struct termios *old_termios)
+void
+sunserial_setinitfunc(unsigned long *memory_start, int (*init) (void))
{
- struct sun_serial *info = (struct sun_serial *)tty->driver_data;
-
- if (tty->termios->c_cflag == old_termios->c_cflag)
- return;
+ struct rs_initfunc *rs_init;
- change_speed(info);
+ *memory_start = (*memory_start + 7) & ~(7);
+ rs_init = (struct rs_initfunc *) *memory_start;
+ *memory_start += sizeof(struct rs_initfunc);
- if ((old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- rs_start(tty);
- }
+ rs_init->rs_init = init;
+ rs_init->next = rs_ops.rs_init;
+ rs_ops.rs_init = rs_init;
}
-/*
- * ------------------------------------------------------------
- * 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
- * ZILOG 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 sun_serial * info = (struct sun_serial *)tty->driver_data;
- unsigned long flags;
-
- if (!info || serial_paranoia_check(info, tty->device, "rs_close"))
- return;
-
- save_flags(flags); cli();
-
- if (tty_hung_up_p(filp)) {
- restore_flags(flags);
- return;
- }
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_close tty-%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) {
- restore_flags(flags);
- return;
- }
- info->flags |= ZILOG_CLOSING;
- /*
- * Save the termios structure, since this port may have
- * separate termios for callout and dialin.
- */
- if (info->flags & ZILOG_NORMAL_ACTIVE)
- info->normal_termios = *tty->termios;
- if (info->flags & ZILOG_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 != ZILOG_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->iscons) ... **/
- info->curregs[3] &= ~RxENAB;
- write_zsreg(info->zs_channel, 3, info->curregs[3]);
- info->curregs[1] &= ~(RxINT_MASK);
- write_zsreg(info->zs_channel, 1, info->curregs[1]);
- ZS_CLEARFIFO(info->zs_channel);
-
- 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 (tty->ldisc.num != ldiscs[N_TTY].num) {
- if (tty->ldisc.close)
- (tty->ldisc.close)(tty);
- tty->ldisc = ldiscs[N_TTY];
- tty->termios->c_line = N_TTY;
- if (tty->ldisc.open)
- (tty->ldisc.open)(tty);
- }
- if (info->blocked_open) {
- if (info->close_delay) {
- current->state = TASK_INTERRUPTIBLE;
- current->timeout = jiffies + info->close_delay;
- schedule();
- }
- wake_up_interruptible(&info->open_wait);
- }
- info->flags &= ~(ZILOG_NORMAL_ACTIVE|ZILOG_CALLOUT_ACTIVE|
- ZILOG_CLOSING);
- wake_up_interruptible(&info->close_wait);
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_close tty-%d exiting, count = %d\n", info->line, info->count);
+extern int zs_probe(unsigned long *);
+#ifdef CONFIG_SAB82532
+extern int sab82532_probe(unsigned long *);
#endif
- restore_flags(flags);
-}
-
-/*
- * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
- */
-void rs_hangup(struct tty_struct *tty)
-{
- struct sun_serial * info = (struct sun_serial *)tty->driver_data;
-
- if (serial_paranoia_check(info, tty->device, "rs_hangup"))
- return;
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_hangup<%p: tty-%d, count = %d bye\n",
- __builtin_return_address(0), info->line, info->count);
+#ifdef __sparc_v9__
+extern int ps2kbd_probe(unsigned long *);
+extern int su_probe(unsigned long *);
#endif
- rs_flush_buffer(tty);
- shutdown(info);
- info->event = 0;
- info->count = 0;
- info->flags &= ~(ZILOG_NORMAL_ACTIVE|ZILOG_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 sun_serial *info)
+unsigned long
+sun_serial_setup(unsigned long memory_start)
{
- struct wait_queue wait = { current, NULL };
- int retval;
- int do_clocal = 0;
- unsigned char r0;
-
- /*
- * If the device is in the middle of being closed, then block
- * until it's done, and then try again.
- */
- if (info->flags & ZILOG_CLOSING) {
- interruptible_sleep_on(&info->close_wait);
-#ifdef SERIAL_DO_RESTART
- if (info->flags & ZILOG_HUP_NOTIFY)
- return -EAGAIN;
- else
- return -ERESTARTSYS;
-#else
- return -EAGAIN;
-#endif
- }
-
- /*
- * If this is a callout device, then just make sure the normal
- * device isn't being used.
- */
- if (tty->driver.subtype == SERIAL_TYPE_CALLOUT) {
- if (info->flags & ZILOG_NORMAL_ACTIVE)
- return -EBUSY;
- if ((info->flags & ZILOG_CALLOUT_ACTIVE) &&
- (info->flags & ZILOG_SESSION_LOCKOUT) &&
- (info->session != current->session))
- return -EBUSY;
- if ((info->flags & ZILOG_CALLOUT_ACTIVE) &&
- (info->flags & ZILOG_PGRP_LOCKOUT) &&
- (info->pgrp != current->pgrp))
- return -EBUSY;
- info->flags |= ZILOG_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 & ZILOG_CALLOUT_ACTIVE)
- return -EBUSY;
- info->flags |= ZILOG_NORMAL_ACTIVE;
- return 0;
- }
+ /* Probe for controllers. */
+ if (zs_probe(&memory_start) == 0)
+ return memory_start;
- if (info->flags & ZILOG_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);
+#ifdef CONFIG_SAB82532
+ sab82532_probe(&memory_start);
#endif
- cli();
- if(!tty_hung_up_p(filp))
- info->count--;
- sti();
- info->blocked_open++;
- while (1) {
- cli();
- if (!(info->flags & ZILOG_CALLOUT_ACTIVE))
- zs_rtsdtr(info, 1);
- sti();
- current->state = TASK_INTERRUPTIBLE;
- if (tty_hung_up_p(filp) ||
- !(info->flags & ZILOG_INITIALIZED)) {
-#ifdef SERIAL_DEBUG_OPEN
- printk("block_til_ready hup-ed: ttys%d, count = %d\n",
- info->line, info->count);
+#ifdef __sparc_v9__
+ if (ps2kbd_probe(&memory_start) == 0)
+ return memory_start;
+ if (su_probe(&memory_start) == 0)
+ return memory_start;
#endif
-#ifdef SERIAL_DO_RESTART
- if (info->flags & ZILOG_HUP_NOTIFY)
- retval = -EAGAIN;
- else
- retval = -ERESTARTSYS;
-#else
- retval = -EAGAIN;
-#endif
- break;
- }
- cli();
- r0 = read_zsreg(info->zs_channel, R0);
- sti();
- if (!(info->flags & ZILOG_CALLOUT_ACTIVE) &&
- !(info->flags & ZILOG_CLOSING) &&
- (do_clocal || (DCD & r0)))
- break;
- if (current->signal & ~current->blocked) {
- 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 |= ZILOG_NORMAL_ACTIVE;
- return 0;
-}
-
-/*
- * This routine is called whenever a serial port is opened. It
- * enables interrupts for a serial port, linking in its ZILOG structure into
- * the IRQ chain. It also performs the serial-specific
- * initialization for the tty structure.
- */
-int rs_open(struct tty_struct *tty, struct file * filp)
-{
- struct sun_serial *info;
- int retval, line;
-
- line = MINOR(tty->device) - tty->driver.minor_start;
- /* The zilog lines for the mouse/keyboard must be
- * opened using their respective drivers.
- */
- if ((line < 0) || (line >= NUM_CHANNELS))
- return -ENODEV;
- if((line == KEYBOARD_LINE) || (line == MOUSE_LINE))
- return -ENODEV;
- info = zs_soft + line;
- /* Is the kgdb running over this line? */
- if (info->kgdb_channel)
- return -ENODEV;
- if (serial_paranoia_check(info, tty->device, "rs_open"))
- return -ENODEV;
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_open %s%d, count = %d\n", tty->driver.name, info->line,
- info->count);
-#endif
- if (info->tty != 0 && info->tty != tty) {
- /* Never happen? */
- printk("rs_open %s%d, tty overwrite.\n", tty->driver.name, info->line);
- return -EBUSY;
- }
- info->count++;
- tty->driver_data = info;
- info->tty = tty;
-
- /*
- * Start up serial port
- */
- retval = startup(info);
- if (retval)
- return retval;
-
- 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 & ZILOG_SPLIT_TERMIOS)) {
- if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
- *tty->termios = info->normal_termios;
- else
- *tty->termios = info->callout_termios;
- change_speed(info);
- }
-
- info->session = current->session;
- info->pgrp = current->pgrp;
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("rs_open ttys%d successful...", info->line);
-#endif
- return 0;
-}
-
-/* Finally, routines used to initialize the serial driver. */
-
-static void show_serial_version(void)
-{
- char *revision = "$Revision: 1.43 $";
- char *version, *p;
-
- version = strchr(revision, ' ');
- p = strchr(++version, ' ');
- *p = '\0';
- printk("Sparc Zilog8530 serial driver version %s\n", version);
- *p = ' ';
-}
-
-/* Probe the PROM for the request zs chip number.
- *
- * Note: The Sun Voyager shows two addresses and two intr for it's
- * Zilogs, what the second does, I don't know. It does work
- * with using only the first number of each property.
- */
-static struct sun_zslayout *get_zs(int chip)
-{
- struct linux_prom_irqs tmp_irq[2];
- unsigned int paddr = 0;
- unsigned int vaddr[2] = { 0, 0 };
- int zsnode, tmpnode, iospace, slave, len, seen, sun4u_irq;
- static int irq = 0;
-
-#if CONFIG_AP1000
- printk("No zs chip\n");
- return NULL;
-#endif
-
- iospace = 0;
- if(chip < 0 || chip >= NUM_SERIAL)
- panic("get_zs bogon zs chip number");
-
- if(sparc_cpu_model == sun4) {
- /* Grrr, these have to be hardcoded aieee */
- switch(chip) {
- case 0:
- paddr = 0xf1000000;
- break;
- case 1:
- paddr = 0xf0000000;
- break;
- };
- iospace = 0;
- zs_nodes[chip] = 0;
- if(!irq)
- zilog_irq = irq = 12;
- vaddr[0] = (unsigned long)
- sparc_alloc_io(paddr, 0, 8,
- "Zilog Serial", iospace, 0);
- } else {
- /* Can use the prom for other machine types */
- zsnode = prom_getchild(prom_root_node);
- if (sparc_cpu_model == sun4d) {
- int board, node;
-
- tmpnode = zsnode;
- while (tmpnode && (tmpnode = prom_searchsiblings(tmpnode, "cpu-unit"))) {
- board = prom_getintdefault (tmpnode, "board#", -1);
- if (board == (chip >> 1)) {
- node = prom_getchild(tmpnode);
- if (node && (node = prom_searchsiblings(node, "bootbus"))) {
- zsnode = node;
- break;
- }
- }
- tmpnode = prom_getsibling(tmpnode);
- }
- if (!tmpnode)
- panic ("get_zs: couldn't find board%d's bootbus\n", chip >> 1);
- } else if (sparc_cpu_model == sun4u) {
- tmpnode = prom_searchsiblings(zsnode, "sbus");
- if(tmpnode)
- zsnode = prom_getchild(tmpnode);
- } else {
- tmpnode = prom_searchsiblings(zsnode, "obio");
- if(tmpnode)
- zsnode = prom_getchild(tmpnode);
- }
- if(!zsnode)
- panic("get_zs no zs serial prom node");
- seen = 0;
- while(zsnode) {
- zsnode = prom_searchsiblings(zsnode, "zs");
- slave = prom_getintdefault(zsnode, "slave", -1);
- if((slave == chip) ||
- (sparc_cpu_model == sun4u && seen == chip)) {
- /* The one we want */
- len = prom_getproperty(zsnode, "address",
- (void *) vaddr,
- sizeof(vaddr));
- if (len % sizeof(unsigned int)) {
- prom_printf("WHOOPS: proplen for %s "
- "was %d, need multiple of "
- "%d\n", "address", len,
- sizeof(unsigned int));
- panic("zilog: address property");
- }
- zs_nodes[chip] = zsnode;
- if(sparc_cpu_model == sun4u) {
- len = prom_getproperty(zsnode, "interrupts",
- (char *) &sun4u_irq,
- sizeof(tmp_irq));
- tmp_irq[0].pri = sun4u_irq;
- } else {
- len = prom_getproperty(zsnode, "intr",
- (char *) tmp_irq,
- sizeof(tmp_irq));
- if (len % sizeof(struct linux_prom_irqs)) {
- prom_printf(
- "WHOOPS: proplen for %s "
- "was %d, need multiple of "
- "%d\n", "address", len,
- sizeof(struct linux_prom_irqs));
- panic("zilog: address property");
- }
- }
- if(!irq) {
- irq = zilog_irq = tmp_irq[0].pri;
- } else {
- if(tmp_irq[0].pri != irq)
- panic("zilog: bogon irqs");
- }
- break;
- }
- zsnode = prom_getsibling(zsnode);
- seen++;
- }
- if(!zsnode)
- panic("get_zs whee chip not found");
- }
- if(!vaddr[0])
- panic("get_zs whee no serial chip mappable");
-
- return (struct sun_zslayout *)(unsigned long) vaddr[0];
-}
-
-static inline void
-init_zscons_termios(struct termios *termios)
-{
- char mode[16], buf[16];
- char *mode_prop = "ttyX-mode";
- char *cd_prop = "ttyX-ignore-cd";
- char *dtr_prop = "ttyX-rts-dtr-off";
- char *s;
- int baud, bits, cflag;
- char parity;
- int topnd, nd;
- int channel, stop;
- int carrier = 0;
- int rtsdtr = 1;
- extern int serial_console;
-
- if (!serial_console)
- return;
-
- if (serial_console == 1) {
- mode_prop[3] = 'a';
- cd_prop[3] = 'a';
- dtr_prop[3] = 'a';
- } else {
- mode_prop[3] = 'b';
- cd_prop[3] = 'b';
- dtr_prop[3] = 'b';
- }
-
- topnd = prom_getchild(prom_root_node);
- nd = prom_searchsiblings(topnd, "options");
- if (!nd) {
- strcpy(mode, "9600,8,n,1,-");
- goto no_options;
- }
-
- if (!prom_node_has_property(nd, mode_prop)) {
- strcpy(mode, "9600,8,n,1,-");
- goto no_options;
- }
-
- memset(mode, 0, sizeof(mode));
- prom_getstring(nd, mode_prop, mode, sizeof(mode));
-
- if (prom_node_has_property(nd, cd_prop)) {
- memset(buf, 0, sizeof(buf));
- prom_getstring(nd, cd_prop, buf, sizeof(buf));
- if (!strcmp(buf, "false"))
- carrier = 1;
-
- /* XXX this is unused below. */
- }
-
- if (prom_node_has_property(nd, cd_prop)) {
- memset(buf, 0, sizeof(buf));
- prom_getstring(nd, cd_prop, buf, sizeof(buf));
- if (!strcmp(buf, "false"))
- rtsdtr = 0;
-
- /* XXX this is unused below. */
- }
-
-no_options:
- cflag = CREAD | HUPCL | CLOCAL;
-
- s = mode;
- baud = simple_strtoul(s, 0, 0);
- s = strchr(s, ',');
- bits = simple_strtoul(++s, 0, 0);
- s = strchr(s, ',');
- parity = *(++s);
- s = strchr(s, ',');
- stop = simple_strtoul(++s, 0, 0);
- s = strchr(s, ',');
- /* XXX handshake is not handled here. */
-
- for (channel = 0; channel < NUM_CHANNELS; channel++)
- if (zs_soft[channel].is_cons)
- break;
-
- switch (baud) {
- case 150:
- cflag |= B150;
- break;
- case 300:
- cflag |= B300;
- break;
- case 600:
- cflag |= B600;
- break;
- case 1200:
- cflag |= B1200;
- break;
- case 2400:
- cflag |= B2400;
- break;
- case 4800:
- cflag |= B4800;
- break;
- default:
- baud = 9600;
- case 9600:
- cflag |= B9600;
- break;
- case 19200:
- cflag |= B19200;
- break;
- case 38400:
- cflag |= B38400;
- break;
- }
- zs_soft[channel].zs_baud = baud;
-
- switch (bits) {
- case 5:
- zscons_regs[3] = Rx5 | RxENAB;
- zscons_regs[5] = Tx5 | TxENAB;
- zs_soft[channel].parity_mask = 0x1f;
- cflag |= CS5;
- break;
- case 6:
- zscons_regs[3] = Rx6 | RxENAB;
- zscons_regs[5] = Tx6 | TxENAB;
- zs_soft[channel].parity_mask = 0x3f;
- cflag |= CS6;
- break;
- case 7:
- zscons_regs[3] = Rx7 | RxENAB;
- zscons_regs[5] = Tx7 | TxENAB;
- zs_soft[channel].parity_mask = 0x7f;
- cflag |= CS7;
- break;
- default:
- case 8:
- zscons_regs[3] = Rx8 | RxENAB;
- zscons_regs[5] = Tx8 | TxENAB;
- zs_soft[channel].parity_mask = 0xff;
- cflag |= CS8;
- break;
- }
- zscons_regs[5] |= DTR;
-
- switch (parity) {
- case 'o':
- zscons_regs[4] |= PAR_ENAB;
- cflag |= (PARENB | PARODD);
- break;
- case 'e':
- zscons_regs[4] |= (PAR_ENAB | PAR_EVEN);
- cflag |= PARENB;
- break;
- default:
- case 'n':
- break;
- }
-
- switch (stop) {
- default:
- case 1:
- zscons_regs[4] |= SB1;
- break;
- case 2:
- cflag |= CSTOPB;
- zscons_regs[4] |= SB2;
- break;
- }
-
- termios->c_cflag = cflag;
-}
-
-static inline void
-rs_cons_check(struct sun_serial *ss, int channel)
-{
- int i, o, io;
- static int consout_registered = 0;
- static int msg_printed = 0;
- static struct console console = {
- zs_console_print, 0,
- zs_console_wait_key, zs_console_device };
-
- i = o = io = 0;
-
- /* Is this one of the serial console lines? */
- if((zs_cons_chanout != channel) &&
- (zs_cons_chanin != channel))
- return;
- zs_conschan = ss->zs_channel;
- zs_consinfo = ss;
-
- /* Register the console output putchar, if necessary */
- if((zs_cons_chanout == channel)) {
- o = 1;
- /* double whee.. */
- if(!consout_registered) {
- extern void serial_finish_init (void (*)(const char *, unsigned count));
-
- serial_finish_init (zs_console_print);
- register_console(&console);
- consout_registered = 1;
- }
- }
-
- /* If this is console input, we handle the break received
- * status interrupt on this line to mean prom_halt().
- */
- if(zs_cons_chanin == channel) {
- ss->break_abort = 1;
- i = 1;
- }
- if(o && i)
- io = 1;
-
- /* Set flag variable for this port so that it cannot be
- * opened for other uses by accident.
- */
- ss->is_cons = 1;
-
- if(io) {
- if(!msg_printed) {
- printk("zs%d: console I/O\n", ((channel>>1)&1));
- msg_printed = 1;
- }
- } else {
- printk("zs%d: console %s\n", ((channel>>1)&1),
- (i==1 ? "input" : (o==1 ? "output" : "WEIRD")));
- }
-}
-
-extern void keyboard_zsinit(void);
-extern void sun_mouse_zsinit(void);
-
-/* This is for the auto baud rate detection in the mouse driver. */
-void zs_change_mouse_baud(int newbaud)
-{
- int channel = MOUSE_LINE;
- int brg;
-
- zs_soft[channel].zs_baud = newbaud;
- brg = BPS_TO_BRG(zs_soft[channel].zs_baud,
- (ZS_CLOCK / zs_soft[channel].clk_divisor));
- write_zsreg(zs_soft[channel].zs_channel, R12, (brg & 0xff));
- write_zsreg(zs_soft[channel].zs_channel, R13, ((brg >> 8) & 0xff));
-}
-
-__initfunc(unsigned long sun_serial_setup (unsigned long memory_start))
-{
- char *p;
- int i;
-
- if (sparc_cpu_model == sun4d) {
- int node = prom_searchsiblings(prom_getchild(prom_root_node), "boards");
- NUM_SERIAL = 0;
- if (!node)
- panic ("Cannot find out count of boards");
- else
- node = prom_getchild(node);
- while (node && (node = prom_searchsiblings(node, "bif"))) {
- NUM_SERIAL += 2;
- node = prom_getsibling(node);
- }
- }
- p = (char *)((memory_start + 7) & ~7);
- zs_chips = (struct sun_zslayout **)(p);
- i = NUM_SERIAL * sizeof (struct sun_zslayout *);
- zs_channels = (struct sun_zschannel **)(p + i);
- i += NUM_CHANNELS * sizeof (struct sun_zschannel *);
- zs_nodes = (int *)(p + i);
- i += NUM_SERIAL * sizeof (int);
- zs_soft = (struct sun_serial *)(p + i);
- i += NUM_CHANNELS * sizeof (struct sun_serial);
- zs_ttys = (struct tty_struct *)(p + i);
- i += NUM_CHANNELS * sizeof (struct tty_struct);
- serial_table = (struct tty_struct **)(p + i);
- i += NUM_CHANNELS * sizeof (struct tty_struct *);
- serial_termios = (struct termios **)(p + i);
- i += NUM_CHANNELS * sizeof (struct termios *);
- serial_termios_locked = (struct termios **)(p + i);
- i += NUM_CHANNELS * sizeof (struct termios *);
- memset (p, 0, i);
- return (((unsigned long)p) + i + 7) & ~7;
-}
-
-__initfunc(int rs_init(void))
-{
- int chip, channel, brg, i;
- unsigned long flags;
- struct sun_serial *info;
- char dummy;
-
-#if CONFIG_AP1000
- printk("not doing rs_init()\n");
- return 0;
-#endif
-
- /* Setup base handler, and timer table. */
- init_bh(SERIAL_BH, do_serial_bh);
- timer_table[RS_TIMER].fn = rs_timer;
- timer_table[RS_TIMER].expires = 0;
-
- show_serial_version();
-
- /* Initialize the tty_driver structure */
- /* SPARC: Not all of this is exactly right for us. */
-
- 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 = NUM_CHANNELS;
- 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.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;
-
- /* I'm too lazy, someone write versions of this for us. -DaveM */
- serial_driver.read_proc = 0;
- serial_driver.proc_entry = 0;
-
- init_zscons_termios(&serial_driver.init_termios);
-
- /*
- * 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;
-
- if (tty_register_driver(&serial_driver))
- panic("Couldn't register serial driver\n");
- if (tty_register_driver(&callout_driver))
- panic("Couldn't register callout driver\n");
-
- save_flags(flags); cli();
-
- /* Set up our interrupt linked list */
- zs_chain = &zs_soft[0];
- for(channel = 0; channel < NUM_CHANNELS - 1; channel++)
- zs_soft[channel].zs_next = &zs_soft[channel + 1];
- zs_soft[channel + 1].zs_next = 0;
-
- /* Initialize Softinfo */
- for(chip = 0; chip < NUM_SERIAL; chip++) {
- /* If we are doing kgdb over one of the channels on
- * chip zero, kgdb_channel will be set to 1 by the
- * rs_kgdb_hook() routine below.
- */
- if(!zs_chips[chip]) {
- zs_chips[chip] = get_zs(chip);
- /* Two channels per chip */
- zs_channels[(chip*2)] = &zs_chips[chip]->channelA;
- zs_channels[(chip*2)+1] = &zs_chips[chip]->channelB;
- zs_soft[(chip*2)].kgdb_channel = 0;
- zs_soft[(chip*2)+1].kgdb_channel = 0;
- }
-
- /* First, set up channel A on this chip. */
- channel = chip * 2;
- zs_soft[channel].zs_channel = zs_channels[channel];
- zs_soft[channel].change_needed = 0;
- zs_soft[channel].clk_divisor = 16;
- zs_soft[channel].cons_keyb = 0;
- zs_soft[channel].cons_mouse = 0;
- zs_soft[channel].channelA = 1;
-
- /* Now, channel B */
- channel++;
- zs_soft[channel].zs_channel = zs_channels[channel];
- zs_soft[channel].change_needed = 0;
- zs_soft[channel].clk_divisor = 16;
- zs_soft[channel].cons_keyb = 0;
- zs_soft[channel].cons_mouse = 0;
- zs_soft[channel].channelA = 0;
- }
-
- /* Initialize Hardware */
- for(channel = 0; channel < NUM_CHANNELS; channel++) {
-
- /* Hardware reset each chip */
- if (!(channel & 1)) {
- write_zsreg(zs_soft[channel].zs_channel, R9, FHWRES);
- udelay(20); /* wait for some old sun4's */
- dummy = read_zsreg(zs_soft[channel].zs_channel, R0);
- }
-
- if(channel == KEYBOARD_LINE) {
- zs_soft[channel].cons_keyb = 1;
- zs_soft[channel].parity_mask = 0xff;
- zs_kbdchan = zs_soft[channel].zs_channel;
-
- write_zsreg(zs_soft[channel].zs_channel, R4,
- (PAR_EVEN | X16CLK | SB1));
- write_zsreg(zs_soft[channel].zs_channel, R3, Rx8);
- write_zsreg(zs_soft[channel].zs_channel, R5, Tx8);
- write_zsreg(zs_soft[channel].zs_channel, R9, NV);
- write_zsreg(zs_soft[channel].zs_channel, R10, NRZ);
- write_zsreg(zs_soft[channel].zs_channel, R11,
- (TCBR | RCBR));
- zs_soft[channel].zs_baud = 1200;
- brg = BPS_TO_BRG(zs_soft[channel].zs_baud,
- ZS_CLOCK/zs_soft[channel].clk_divisor);
- write_zsreg(zs_soft[channel].zs_channel, R12,
- (brg & 0xff));
- write_zsreg(zs_soft[channel].zs_channel, R13,
- ((brg >> 8) & 0xff));
- write_zsreg(zs_soft[channel].zs_channel, R14, BRSRC);
-
- /* Enable Rx/Tx, IRQs, and inform kbd driver */
- write_zsreg(zs_soft[channel].zs_channel, R14,
- (BRSRC | BRENAB));
- write_zsreg(zs_soft[channel].zs_channel, R3,
- (Rx8 | RxENAB));
- write_zsreg(zs_soft[channel].zs_channel, R5,
- (Tx8 | TxENAB | DTR | RTS));
-
- write_zsreg(zs_soft[channel].zs_channel, R15,
- (DCDIE | CTSIE | TxUIE | BRKIE));
- write_zsreg(zs_soft[channel].zs_channel, R0,
- RES_EXT_INT);
- write_zsreg(zs_soft[channel].zs_channel, R0,
- RES_EXT_INT);
-
- write_zsreg(zs_soft[channel].zs_channel, R1,
- (EXT_INT_ENAB | INT_ALL_Rx));
- write_zsreg(zs_soft[channel].zs_channel, R9,
- (NV | MIE));
- ZS_CLEARERR(zs_soft[channel].zs_channel);
- ZS_CLEARFIFO(zs_soft[channel].zs_channel);
- } else if(channel == MOUSE_LINE) {
- zs_soft[channel].cons_mouse = 1;
- zs_soft[channel].parity_mask = 0xff;
- zs_mousechan = zs_soft[channel].zs_channel;
-
- write_zsreg(zs_soft[channel].zs_channel, R4,
- (PAR_EVEN | X16CLK | SB1));
- write_zsreg(zs_soft[channel].zs_channel, R3, Rx8);
- write_zsreg(zs_soft[channel].zs_channel, R5, Tx8);
- write_zsreg(zs_soft[channel].zs_channel, R9, NV);
- write_zsreg(zs_soft[channel].zs_channel, R10, NRZ);
- write_zsreg(zs_soft[channel].zs_channel, R11,
- (TCBR | RCBR));
-
- zs_soft[channel].zs_baud = 4800;
- brg = BPS_TO_BRG(zs_soft[channel].zs_baud,
- ZS_CLOCK/zs_soft[channel].clk_divisor);
- write_zsreg(zs_soft[channel].zs_channel, R12,
- (brg & 0xff));
- write_zsreg(zs_soft[channel].zs_channel, R13,
- ((brg >> 8) & 0xff));
- write_zsreg(zs_soft[channel].zs_channel, R14, BRSRC);
-
- /* Enable Rx, IRQs, and inform mouse driver */
- write_zsreg(zs_soft[channel].zs_channel, R14,
- (BRSRC | BRENAB));
- write_zsreg(zs_soft[channel].zs_channel, R3,
- (Rx8 | RxENAB));
- write_zsreg(zs_soft[channel].zs_channel, R5, Tx8);
-
- write_zsreg(zs_soft[channel].zs_channel, R15,
- (DCDIE | CTSIE | TxUIE | BRKIE));
- write_zsreg(zs_soft[channel].zs_channel, R0,
- RES_EXT_INT);
- write_zsreg(zs_soft[channel].zs_channel, R0,
- RES_EXT_INT);
-
- write_zsreg(zs_soft[channel].zs_channel, R1,
- (EXT_INT_ENAB | INT_ALL_Rx));
- write_zsreg(zs_soft[channel].zs_channel, R9,
- (NV | MIE));
-
- sun_mouse_zsinit();
- } else if (zs_soft[channel].is_cons) {
- brg = BPS_TO_BRG(zs_soft[channel].zs_baud,
- ZS_CLOCK/zs_soft[channel].clk_divisor);
- zscons_regs[12] = brg & 0xff;
- zscons_regs[13] = (brg >> 8) & 0xff;
-
- memcpy(zs_soft[channel].curregs, zscons_regs, sizeof(zscons_regs));
- load_zsregs(&zs_soft[channel], zscons_regs);
-
- ZS_CLEARERR(zs_soft[channel].zs_channel);
- ZS_CLEARFIFO(zs_soft[channel].zs_channel);
- } else if (zs_soft[channel].kgdb_channel) {
- /* If this is the kgdb line, enable interrupts because
- * we now want to receive the 'control-c' character
- * from the client attached to us asynchronously.
- */
- zs_soft[channel].parity_mask = 0xff;
- kgdb_chaninit(&zs_soft[channel], 1,
- zs_soft[channel].zs_baud);
- } else {
- zs_soft[channel].parity_mask = 0xff;
- write_zsreg(zs_soft[channel].zs_channel, R4,
- (PAR_EVEN | X16CLK | SB1));
- write_zsreg(zs_soft[channel].zs_channel, R3, Rx8);
- write_zsreg(zs_soft[channel].zs_channel, R5, Tx8);
- write_zsreg(zs_soft[channel].zs_channel, R9, NV);
- write_zsreg(zs_soft[channel].zs_channel, R10, NRZ);
- write_zsreg(zs_soft[channel].zs_channel, R11,
- (RCBR | TCBR));
- zs_soft[channel].zs_baud = 9600;
- brg = BPS_TO_BRG(zs_soft[channel].zs_baud,
- ZS_CLOCK/zs_soft[channel].clk_divisor);
- write_zsreg(zs_soft[channel].zs_channel, R12,
- (brg & 0xff));
- write_zsreg(zs_soft[channel].zs_channel, R13,
- ((brg >> 8) & 0xff));
- write_zsreg(zs_soft[channel].zs_channel, R14, BRSRC);
- write_zsreg(zs_soft[channel].zs_channel, R14,
- (BRSRC | BRENAB));
- write_zsreg(zs_soft[channel].zs_channel, R3, Rx8);
- write_zsreg(zs_soft[channel].zs_channel, R5, Tx8);
- write_zsreg(zs_soft[channel].zs_channel, R15, DCDIE);
- write_zsreg(zs_soft[channel].zs_channel, R9, NV | MIE);
- write_zsreg(zs_soft[channel].zs_channel, R0,
- RES_EXT_INT);
- write_zsreg(zs_soft[channel].zs_channel, R0,
- RES_EXT_INT);
- }
- }
-
- for (info = zs_chain, i=0; info; info = info->zs_next, i++) {
- info->magic = SERIAL_MAGIC;
- info->port = (long) info->zs_channel;
- info->line = i;
- info->tty = 0;
- info->irq = zilog_irq;
- info->custom_divisor = 16;
- info->close_delay = 50;
- info->closing_wait = 3000;
- info->x_char = 0;
- info->event = 0;
- info->count = 0;
- info->blocked_open = 0;
- info->tqueue.routine = do_softint;
- info->tqueue.data = info;
- info->tqueue_hangup.routine = do_serial_hangup;
- info->tqueue_hangup.data = info;
- info->callout_termios = callout_driver.init_termios;
- info->normal_termios = serial_driver.init_termios;
- info->open_wait = 0;
- info->close_wait = 0;
- printk("tty%02d at 0x%04x (irq = %d)", info->line,
- info->port, info->irq);
- printk(" is a Zilog8530\n");
- }
-
- if (request_irq(zilog_irq, rs_interrupt,
- (SA_INTERRUPT | SA_STATIC_ALLOC),
- "Zilog8530", zs_chain))
- panic("Unable to attach zs intr\n");
- restore_flags(flags);
-
- keyboard_zsinit();
- return 0;
-}
-
-/*
- * register_serial and unregister_serial allows for serial ports to be
- * configured at run-time, to support PCMCIA modems.
- */
-/* SPARC: Unused at this time, just here to make things link. */
-int register_serial(struct serial_struct *req)
-{
- return -1;
-}
-
-void unregister_serial(int line)
-{
- return;
-}
-
-/* Hooks for running a serial console. con_init() calls this if the
- * console is being run over one of the ttya/ttyb serial ports.
- * 'chip' should be zero, as chip 1 drives the mouse/keyboard.
- * 'channel' is decoded as 0=TTYA 1=TTYB, note that the channels
- * are addressed backwards, channel B is first, then channel A.
- */
-void
-rs_cons_hook(int chip, int out, int line)
-{
- int channel;
-
- if(chip)
- panic("rs_cons_hook called with chip not zero");
- if(line != 1 && line != 2)
- panic("rs_cons_hook called with line not ttya or ttyb");
- channel = line - 1;
- if(!zs_chips[chip]) {
- zs_chips[chip] = get_zs(chip);
- /* Two channels per chip */
- zs_channels[(chip*2)] = &zs_chips[chip]->channelA;
- zs_channels[(chip*2)+1] = &zs_chips[chip]->channelB;
- }
- zs_soft[channel].zs_channel = zs_channels[channel];
- zs_soft[channel].change_needed = 0;
- zs_soft[channel].clk_divisor = 16;
- if(out)
- zs_cons_chanout = ((chip * 2) + channel);
- else
- zs_cons_chanin = ((chip * 2) + channel);
- rs_cons_check(&zs_soft[channel], channel);
-}
-
-/* This is called at boot time to prime the kgdb serial debugging
- * serial line. The 'tty_num' argument is 0 for /dev/ttya and 1
- * for /dev/ttyb which is determined in setup_arch() from the
- * boot command line flags.
- */
-void
-rs_kgdb_hook(int tty_num)
-{
- int chip = 0;
-
- if(!zs_chips[chip]) {
- zs_chips[chip] = get_zs(chip);
- /* Two channels per chip */
- zs_channels[(chip*2)] = &zs_chips[chip]->channelA;
- zs_channels[(chip*2)+1] = &zs_chips[chip]->channelB;
- }
- zs_soft[tty_num].zs_channel = zs_channels[tty_num];
- zs_kgdbchan = zs_soft[tty_num].zs_channel;
- zs_soft[tty_num].change_needed = 0;
- zs_soft[tty_num].clk_divisor = 16;
- zs_soft[tty_num].zs_baud = 9600;
- zs_soft[tty_num].kgdb_channel = 1; /* This runs kgdb */
- zs_soft[tty_num ^ 1].kgdb_channel = 0; /* This does not */
- /* Turn on transmitter/receiver at 8-bits/char */
- kgdb_chaninit(&zs_soft[tty_num], 0, 9600);
- ZS_CLEARERR(zs_kgdbchan);
- ZS_CLEARFIFO(zs_kgdbchan);
+ prom_printf("No serial devices found, bailing out.\n");
+ prom_halt();
+ return memory_start;
}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov