patch-2.1.53 linux/drivers/sbus/char/zs.c
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- Lines: 2787
- Date:
Thu Sep 4 12:54:49 1997
- Orig file:
v2.1.52/linux/drivers/sbus/char/zs.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.1.52/linux/drivers/sbus/char/zs.c linux/drivers/sbus/char/zs.c
@@ -0,0 +1,2786 @@
+/* $Id: zs.c,v 1.3 1997/09/04 14:57:34 jj Exp $
+ * zs.c: Zilog serial port driver 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>.
+ */
+
+#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/delay.h>
+#include <linux/version.h>
+#include <linux/init.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/kdebug.h>
+
+#include <asm/sbus.h>
+#ifdef __sparc_v9__
+#include <asm/fhc.h>
+#endif
+
+#include "sunserial.h"
+#include "zs.h"
+#include "sunkbd.h"
+#include "sunmouse.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;
+struct sun_serial *zs_consinfo = 0;
+
+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
+
+int zs_init(void);
+void zs_cons_hook(int, int, int);
+void zs_kgdb_hook(int);
+
+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);
+}
+
+/*
+ * ------------------------------------------------------------
+ * zs_stop() and zs_start()
+ *
+ * This routines are called before setting or resetting tty->stopped.
+ * They enable or disable transmitter interrupts, as necessary.
+ * ------------------------------------------------------------
+ */
+static void zs_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, "zs_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 zs_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, "zs_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.
+ */
+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
+ * zs_interrupt(). They were separated out for readability's sake.
+ *
+ * Note: zs_interrupt() is a "fast" interrupt, which means that it
+ * runs with interrupts turned off. People who may want to modify
+ * zs_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 zs_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)
+ zs_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)
+{
+ 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 zs_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
+ * zs_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 zs_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);
+ }
+}
+
+/*
+ * 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() -> zs_hangup()
+ *
+ */
+static void do_serial_hangup(void *private_)
+{
+ 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);
+}
+
+
+/*
+ * 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 zs_timer(void)
+{
+ printk("zs_timer called\n");
+ prom_halt();
+ return;
+}
+
+static int startup(struct sun_serial * info)
+{
+ 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);
+ 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
+ */
+static 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 zs_cons_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 zs_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);
+
+ zs_cons_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')
+ zs_cons_put_char('\r');
+ zs_cons_put_char(*s);
+ }
+
+ /* Comment this if you want to have a strict interrupt-driven output */
+ zs_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 zs_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, "zs_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 zs_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, "zs_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 zs_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, "zs_write_room"))
+ return 0;
+ ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
+ if (ret < 0)
+ ret = 0;
+ return ret;
+}
+
+static int zs_chars_in_buffer(struct tty_struct *tty)
+{
+ struct sun_serial *info = (struct sun_serial *)tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->device, "zs_chars_in_buffer"))
+ return 0;
+ return info->xmit_cnt;
+}
+
+static void zs_flush_buffer(struct tty_struct *tty)
+{
+ struct sun_serial *info = (struct sun_serial *)tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->device, "zs_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);
+}
+
+/*
+ * ------------------------------------------------------------
+ * zs_throttle()
+ *
+ * This routine is called by the upper-layer tty layer to signal that
+ * incoming characters should be throttled.
+ * ------------------------------------------------------------
+ */
+static void zs_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, "zs_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();
+}
+
+static void zs_unthrottle(struct tty_struct * tty)
+{
+ 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
+
+ if (serial_paranoia_check(info, tty->device, "zs_unthrottle"))
+ return;
+
+ if (I_IXOFF(tty)) {
+ if (info->x_char)
+ info->x_char = 0;
+ else
+ info->x_char = START_CHAR(tty);
+ }
+
+ /* Assert RTS line */
+ cli();
+ info->curregs[5] |= RTS;
+ write_zsreg(info->zs_channel, 5, info->curregs[5]);
+ sti();
+}
+
+/*
+ * ------------------------------------------------------------
+ * zs_ioctl() and friends
+ * ------------------------------------------------------------
+ */
+
+static int get_serial_info(struct sun_serial * info,
+ struct serial_struct * retinfo)
+{
+ 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;
+}
+
+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)
+{
+ unsigned char status;
+
+ cli();
+ status = info->zs_channel->control;
+ sti();
+ put_user_ret(status,value, -EFAULT);
+ return 0;
+}
+
+static int get_modem_info(struct sun_serial * info, unsigned int *value)
+{
+ 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;
+}
+
+static int set_modem_info(struct sun_serial * info, unsigned int cmd,
+ unsigned int *value)
+{
+ 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;
+}
+
+/*
+ * This routine sends a break character out the serial port.
+ */
+static void send_break( struct sun_serial * info, int duration)
+{
+ 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();
+}
+
+static int zs_ioctl(struct tty_struct *tty, struct file * file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct sun_serial * info = (struct sun_serial *)tty->driver_data;
+ int retval;
+
+ if (serial_paranoia_check(info, tty->device, "zs_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 zs_set_termios(struct tty_struct *tty, struct termios *old_termios)
+{
+ struct sun_serial *info = (struct sun_serial *)tty->driver_data;
+
+ if (tty->termios->c_cflag == old_termios->c_cflag)
+ return;
+
+ change_speed(info);
+
+ if ((old_termios->c_cflag & CRTSCTS) &&
+ !(tty->termios->c_cflag & CRTSCTS)) {
+ tty->hw_stopped = 0;
+ zs_start(tty);
+ }
+}
+
+/*
+ * ------------------------------------------------------------
+ * zs_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 zs_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, "zs_close"))
+ return;
+
+ save_flags(flags); cli();
+
+ if (tty_hung_up_p(filp)) {
+ restore_flags(flags);
+ return;
+ }
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk("zs_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("zs_close: bad serial port count; tty->count is 1, "
+ "info->count is %d\n", info->count);
+ info->count = 1;
+ }
+ if (--info->count < 0) {
+ printk("zs_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("zs_close tty-%d exiting, count = %d\n", info->line, info->count);
+#endif
+ restore_flags(flags);
+}
+
+/*
+ * zs_hangup() --- called by tty_hangup() when a hangup is signaled.
+ */
+void zs_hangup(struct tty_struct *tty)
+{
+ struct sun_serial * info = (struct sun_serial *)tty->driver_data;
+
+ if (serial_paranoia_check(info, tty->device, "zs_hangup"))
+ return;
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk("zs_hangup<%p: tty-%d, count = %d bye\n",
+ __builtin_return_address(0), info->line, info->count);
+#endif
+
+ zs_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);
+}
+
+/*
+ * ------------------------------------------------------------
+ * zs_open() and friends
+ * ------------------------------------------------------------
+ */
+static int block_til_ready(struct tty_struct *tty, struct file * filp,
+ struct sun_serial *info)
+{
+ 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;
+ }
+
+ 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
+ * zs_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 & 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);
+#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 zs_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, "zs_open"))
+ return -ENODEV;
+#ifdef SERIAL_DEBUG_OPEN
+ printk("zs_open %s%d, count = %d\n", tty->driver.name, info->line,
+ info->count);
+#endif
+ if (info->tty != 0 && info->tty != tty) {
+ /* Never happen? */
+ printk("zs_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("zs_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("zs_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: 1.3 $";
+ 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. Also
+ * we have a special version for sun4u.
+ */
+#ifdef __sparc_v9__
+static struct devid_cookie zs_dcookie;
+static unsigned long zs_irq_flags;
+static struct sun_zslayout *get_zs(int chip)
+{
+ unsigned int vaddr[2] = { 0, 0 };
+ int busnode, seen, zsnode, sun4u_ino;
+ static int irq = 0;
+
+ if(chip < 0 || chip >= NUM_SERIAL)
+ panic("get_zs bogon zs chip number");
+
+ if(central_bus)
+ busnode = central_bus->child->prom_node;
+ else
+ busnode = prom_searchsiblings(prom_getchild(prom_root_node), "sbus");
+ if(busnode == 0 || busnode == -1)
+ panic("get_zs: no zs bus to search");
+
+ zsnode = prom_getchild(busnode);
+ seen = 0;
+ while(zsnode) {
+ int slave;
+
+ zsnode = prom_searchsiblings(zsnode, "zs");
+ slave = prom_getintdefault(zsnode, "slave", -1);
+ if((slave == chip) || (seen == chip)) {
+ int 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;
+ len = prom_getproperty(zsnode, "interrupts",
+ (char *) &sun4u_ino,
+ (sizeof(sun4u_ino)));
+ if(!irq) {
+ irq = zilog_irq = sun4u_ino;
+
+ /* Construct dcookie. */
+ if(central_bus) {
+ zs_dcookie.imap =
+ ¢ral_bus->child->fhc_regs.uregs->fhc_uart_imap;
+ zs_dcookie.iclr =
+ ¢ral_bus->child->fhc_regs.uregs->fhc_uart_iclr;
+ zs_dcookie.pil = 12;
+ zs_dcookie.bus_cookie = NULL;
+ zs_irq_flags =
+ (SA_DCOOKIE|SA_INTERRUPT|SA_STATIC_ALLOC|SA_FHC);
+ } else {
+ zs_dcookie.imap = zs_dcookie.iclr = NULL;
+ zs_dcookie.pil = -1;
+ zs_dcookie.bus_cookie = SBus_chain;
+ zs_irq_flags =
+ (SA_DCOOKIE|SA_INTERRUPT|SA_STATIC_ALLOC|SA_SBUS);
+ }
+ } else if(irq != sun4u_ino) {
+ 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];
+}
+#else /* !(__sparc_v9__) */
+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];
+}
+#endif
+
+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;
+}
+
+__initfunc(static void serial_finish_init(void (*printfunc)(const char *, unsigned)))
+{
+ extern unsigned char *linux_serial_image;
+ char buffer[2048];
+
+ sprintf (buffer, linux_serial_image, UTS_RELEASE);
+ (*printfunc)(buffer, strlen(buffer));
+}
+
+static inline void
+zs_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) {
+ 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")));
+ }
+}
+
+/* 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(int zs_probe (unsigned long *memory_start))
+{
+ char *p;
+ int node;
+ int i;
+
+ if(sparc_cpu_model == sun4)
+ goto no_probe;
+
+ node = prom_getchild(prom_root_node);
+ if (sparc_cpu_model == sun4d) {
+ node = prom_searchsiblings(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);
+ }
+ goto no_probe;
+ } else if (sparc_cpu_model == sun4u) {
+ node = prom_searchsiblings(node, "sbus");
+ if(node)
+ node = prom_getchild(node);
+ if(!node)
+ return -ENODEV;
+ } else {
+ node = prom_searchsiblings(node, "obio");
+ if(node)
+ node = prom_getchild(node);
+ goto no_probe;
+ }
+
+ node = prom_searchsiblings(node, "zs");
+ if (!node)
+ return -ENODEV;
+
+no_probe:
+ 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);
+ *memory_start = (((unsigned long)p) + i + 7) & ~7;
+
+ /* Fill in rs_ops struct... */
+ sunserial_setinitfunc(memory_start, zs_init);
+ rs_ops.rs_cons_hook = zs_cons_hook;
+ rs_ops.rs_kgdb_hook = zs_kgdb_hook;
+ rs_ops.rs_change_mouse_baud = zs_change_mouse_baud;
+
+ return 0;
+}
+
+__initfunc(int zs_init(void))
+{
+ int chip, channel, brg, i;
+ unsigned long flags;
+ struct sun_serial *info;
+ char dummy;
+
+#if CONFIG_AP1000
+ printk("not doing zs_init()\n");
+ return 0;
+#endif
+
+#ifdef CONFIG_PCI
+ if (prom_searchsiblings(prom_getchild(prom_root_node), "pci"))
+ return 0;
+#endif
+
+ /* Setup base handler, and timer table. */
+ init_bh(SERIAL_BH, do_serial_bh);
+ timer_table[RS_TIMER].fn = zs_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 = zs_open;
+ serial_driver.close = zs_close;
+ serial_driver.write = zs_write;
+ serial_driver.flush_chars = zs_flush_chars;
+ serial_driver.write_room = zs_write_room;
+ serial_driver.chars_in_buffer = zs_chars_in_buffer;
+ serial_driver.flush_buffer = zs_flush_buffer;
+ serial_driver.ioctl = zs_ioctl;
+ serial_driver.throttle = zs_throttle;
+ serial_driver.unthrottle = zs_unthrottle;
+ serial_driver.set_termios = zs_set_termios;
+ serial_driver.stop = zs_stop;
+ serial_driver.start = zs_start;
+ serial_driver.hangup = zs_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
+ * zs_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");
+ }
+
+#ifndef __sparc_v9__
+ if (request_irq(zilog_irq, zs_interrupt,
+ (SA_INTERRUPT | SA_STATIC_ALLOC),
+ "Zilog8530", zs_chain))
+ panic("Unable to attach zs intr\n");
+#else
+ zs_dcookie.real_dev_id = zs_chain;
+ if (request_irq(zilog_irq, zs_interrupt,
+ zs_irq_flags, "Zilog8530", &zs_dcookie))
+ panic("Unable to attach zs intr\n");
+#endif
+ restore_flags(flags);
+
+ keyboard_zsinit(kbd_put_char);
+ return 0;
+}
+
+/* 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
+zs_cons_hook(int chip, int out, int line)
+{
+ int channel;
+
+#ifdef CONFIG_PCI
+ if (prom_searchsiblings(prom_getchild(prom_root_node), "pci"))
+ return;
+#endif
+
+ if(chip)
+ panic("zs_cons_hook called with chip not zero");
+ if(line != 1 && line != 2)
+ panic("zs_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);
+ zs_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
+zs_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);
+}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov