patch-2.3.45 linux/drivers/char/mac_SCC.c
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- Lines: 1530
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.3.44/linux/drivers/char/mac_SCC.c
- Orig date:
Fri Dec 18 09:36:05 1998
diff -u --recursive --new-file v2.3.44/linux/drivers/char/mac_SCC.c linux/drivers/char/mac_SCC.c
@@ -1,1529 +0,0 @@
-/*
- * mac_SCC.c: m68k version of
- *
- * macserial.c: Serial port driver for Power Macintoshes.
- * Extended for the 68K mac by Alan Cox.
- * Rewritten to m68k serial design by Michael Schmitz
- *
- * Derived from drivers/sbus/char/sunserial.c by Paul Mackerras.
- *
- * Copyright (C) 1996 Paul Mackerras (Paul.Mackerras@cs.anu.edu.au)
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- */
-
-/*
- * Design note for the m68k rewrite:
- * The structure of the m68k serial code requires separation of the low-level
- * functions that talk directly to the hardware from the Linux serial driver
- * code interfacing to the tty layer. The reason for this separation is simply
- * the fact that the m68k serial hardware is, unlike the i386, based on a
- * variety of chips, and the rs_* serial routines need to be shared.
- *
- * I've tried to make consistent use of the async_struct info populated in the
- * midlevel code, and introduced an async_private struct to hold the Macintosh
- * SCC internals (this was added to the async_struct for the PowerMac driver).
- * Exception: the console and kgdb hooks still use the zs_soft[] data, and this
- * is still filled in by the probe_sccs() routine, which provides some data
- * for mac_SCC_init as well. Interrupts are registered in mac_SCC_init, so
- * the console/kgdb stuff probably won't work before proper serial init, and
- * I have to rely on keeping info and zs_soft consistent at least for the
- * console/kgdb port.
- *
- * Update (16-11-97): The SCC interrupt handling was suffering from the problem
- * that the autovector SCC interrupt was registered only once, hence only one
- * async_struct was passed to the interrupt function and only interrupts from
- * the corresponding channel could be handled (yes, major design flaw).
- * The autovector interrupt is now registered by the main interrupt initfunc,
- * and uses a handler that will call the registered SCC specific interrupts in
- * turn. The SCC init has to register these as machspec interrupts now, as is
- * done for the VIA interrupts elsewhere.
- */
-
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/timer.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/config.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/mm.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-
-#include <asm/uaccess.h>
-#include <asm/setup.h>
-#include <asm/bootinfo.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/macints.h>
-#ifndef CONFIG_MAC
-#include <asm/prom.h>
-#endif
-#include <asm/system.h>
-#include <asm/segment.h>
-#include <asm/bitops.h>
-#include <asm/hwtest.h>
-
-#include "mac_SCC.h"
-
-/*
- * It would be nice to dynamically allocate everything that
- * depends on NUM_SERIAL, so we could support any number of
- * Z8530s, but for now...
- */
-#define NUM_SERIAL 2 /* Max number of ZS chips supported */
-#define NUM_CHANNELS (NUM_SERIAL * 2) /* 2 channels per chip */
-
-#ifdef CONFIG_MAC
-/*
- * All the Macintosh 68K boxes that have an MMU also have hardware
- * recovery delays.
- */
-#define RECOVERY_DELAY
-#else
-/* On PowerMacs, the hardware takes care of the SCC recovery time,
- but we need the eieio to make sure that the accesses occur
- in the order we want. */
-#define RECOVERY_DELAY eieio()
-#endif
-
-struct mac_zschannel *zs_kgdbchan;
-struct mac_zschannel zs_channels[NUM_CHANNELS];
-
-struct m68k_async_struct zs_soft[NUM_CHANNELS];
-struct m68k_async_private zs_soft_private[NUM_CHANNELS];
-int zs_channels_found;
-struct m68k_async_struct *zs_chain; /* list of all channels */
-
-struct tty_struct zs_ttys[NUM_CHANNELS];
-/** struct tty_struct *zs_constty; **/
-
-/* Console hooks... */
-static int zs_cons_chanout = 0;
-static int zs_cons_chanin = 0;
-struct m68k_async_struct *zs_consinfo = 0;
-struct mac_zschannel *zs_conschan;
-
-static unsigned char kgdb_regs[16] = {
- 0, 0, 0, /* write 0, 1, 2 */
- (Rx8 | RxENABLE), /* write 3 */
- (X16CLK | SB1 | PAR_EVEN), /* write 4 */
- (Tx8 | TxENAB), /* write 5 */
- 0, 0, 0, /* write 6, 7, 8 */
- (NV), /* write 9 */
- (NRZ), /* write 10 */
- (TCBR | RCBR), /* write 11 */
- 1, 0, /* 38400 baud divisor, write 12 + 13 */
- (BRENABL), /* write 14 */
- (DCDIE) /* write 15 */
-};
-
-#define ZS_CLOCK 3686400 /* Z8530 RTxC input clock rate */
-
-/* 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 probe_sccs(void);
-
-#ifndef MIN
-#define MIN(a,b) ((a) < (b) ? (a) : (b))
-#endif
-
-
-/***************************** Prototypes *****************************/
-
-static void SCC_init_port( struct m68k_async_struct *info, int type, int channel );
-#if 0
-#ifdef MODULE
-static void SCC_deinit_port( struct m68k_async_struct *info, int channel );
-#endif
-#endif
-
-/* FIXME !!! Currently, only autovector interrupt used! */
-#if 0
-static void SCC_rx_int (int irq, void *data, struct pt_regs *fp);
-static void SCC_spcond_int (int irq, void *data, struct pt_regs *fp);
-static void SCC_tx_int (int irq, void *data, struct pt_regs *fp);
-static void SCC_stat_int (int irq, void *data, struct pt_regs *fp);
-static void SCC_ri_int (int irq, void *data, struct pt_regs *fp);
-#endif
-
-static int SCC_check_open( struct m68k_async_struct *info, struct tty_struct
- *tty, struct file *file );
-static void SCC_init( struct m68k_async_struct *info );
-static void SCC_deinit( struct m68k_async_struct *info, int leave_dtr );
-static void SCC_enab_tx_int( struct m68k_async_struct *info, int enab_flag );
-static int SCC_check_custom_divisor( struct m68k_async_struct *info, int baud_base,
- int divisor );
-static void SCC_change_speed( struct m68k_async_struct *info );
-#if 0
-static int SCC_clocksrc( unsigned baud_base, unsigned channel );
-#endif
-static void SCC_throttle( struct m68k_async_struct *info, int status );
-static void SCC_set_break( struct m68k_async_struct *info, int break_flag );
-static void SCC_get_serial_info( struct m68k_async_struct *info, struct
- serial_struct *retinfo );
-static unsigned int SCC_get_modem_info( struct m68k_async_struct *info );
-static int SCC_set_modem_info( struct m68k_async_struct *info, int new_dtr, int
- new_rts );
-static int SCC_ioctl( struct tty_struct *tty, struct file *file, struct
- m68k_async_struct *info, unsigned int cmd, unsigned long arg );
-static void SCC_stop_receive (struct m68k_async_struct *info);
-static int SCC_trans_empty (struct m68k_async_struct *info);
-
-/************************* End of Prototypes **************************/
-
-
-static SERIALSWITCH SCC_switch = {
- SCC_init, SCC_deinit, SCC_enab_tx_int,
- SCC_check_custom_divisor, SCC_change_speed,
- SCC_throttle, SCC_set_break,
- SCC_get_serial_info, SCC_get_modem_info,
- SCC_set_modem_info, SCC_ioctl, SCC_stop_receive, SCC_trans_empty,
- SCC_check_open
-};
-
-/*
- * 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, 57600, 115200, 0 };
-
-/*
- * Reading and writing Z8530 registers.
- */
-static inline unsigned char read_zsreg(struct mac_zschannel *channel,
- unsigned char reg)
-{
- unsigned char retval;
-
- if (reg != 0) {
- *channel->control = reg;
- RECOVERY_DELAY;
- }
- retval = *channel->control;
- RECOVERY_DELAY;
- return retval;
-}
-
-static inline void write_zsreg(struct mac_zschannel *channel,
- unsigned char reg, unsigned char value)
-{
- if (reg != 0) {
- *channel->control = reg;
- RECOVERY_DELAY;
- }
- *channel->control = value;
- RECOVERY_DELAY;
- return;
-}
-
-static inline unsigned char read_zsdata(struct mac_zschannel *channel)
-{
- unsigned char retval;
-
- retval = *channel->data;
- RECOVERY_DELAY;
- return retval;
-}
-
-static inline void write_zsdata(struct mac_zschannel *channel,
- unsigned char value)
-{
- *channel->data = value;
- RECOVERY_DELAY;
- return;
-}
-
-static inline void load_zsregs(struct mac_zschannel *channel,
- unsigned char *regs)
-{
- ZS_CLEARERR(channel);
- ZS_CLEARFIFO(channel);
- /* Load 'em up */
- write_zsreg(channel, R4, regs[R4]);
- write_zsreg(channel, R10, regs[R10]);
- write_zsreg(channel, R3, regs[R3] & ~RxENABLE);
- write_zsreg(channel, R5, regs[R5] & ~TxENAB);
- write_zsreg(channel, R1, regs[R1]);
- write_zsreg(channel, R9, regs[R9]);
- write_zsreg(channel, R11, regs[R11]);
- write_zsreg(channel, R12, regs[R12]);
- write_zsreg(channel, R13, regs[R13]);
- write_zsreg(channel, R14, regs[R14]);
- write_zsreg(channel, R15, regs[R15]);
- write_zsreg(channel, R3, regs[R3]);
- write_zsreg(channel, R5, regs[R5]);
- return;
-}
-
-/* Sets or clears DTR/RTS on the requested line */
-static inline void zs_rtsdtr(struct m68k_async_struct *ss, int set)
-{
- if (set)
- ss->private->curregs[5] |= (RTS | DTR);
- else
- ss->private->curregs[5] &= ~(RTS | DTR);
- write_zsreg(ss->private->zs_channel, 5, ss->private->curregs[5]);
- return;
-}
-
-static inline void kgdb_chaninit(struct m68k_async_struct *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;
- kgdb_regs[R13] = brg >> 8;
- load_zsregs(ss->private->zs_channel, kgdb_regs);
-}
-
-/* Utility routines for the Zilog */
-static inline int get_zsbaud(struct m68k_async_struct *ss)
-{
- struct mac_zschannel *channel = ss->private->zs_channel;
- int brg;
-
- /* The baud rate is split up between two 8-bit registers in
- * what is termed 'BRG time constant' format in my docs for
- * the chip, it is a function of the clk rate the chip is
- * receiving which happens to be constant.
- */
- brg = (read_zsreg(channel, 13) << 8);
- brg |= read_zsreg(channel, 12);
- return BRG_TO_BPS(brg, (ZS_CLOCK/(ss->private->clk_divisor)));
-}
-
-/* On receive, this clears errors and the receiver interrupts */
-static inline void SCC_recv_clear(struct mac_zschannel *zsc)
-{
- write_zsreg(zsc, 0, ERR_RES);
- write_zsreg(zsc, 0, RES_H_IUS); /* XXX this is unnecessary */
-}
-
-/*
- * ----------------------------------------------------------------------
- *
- * 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.
- *
- * - Ted Ts'o (tytso@mit.edu), 7-Mar-93
- * -----------------------------------------------------------------------
- */
-
-extern void breakpoint(void); /* For the KGDB frame character */
-
-static /*_INLINE_*/ void receive_chars(struct m68k_async_struct *info,
- struct pt_regs *regs)
-{
- struct tty_struct *tty = info->tty;
- unsigned char ch, stat, flag;
-
- while ((read_zsreg(info->private->zs_channel, 0) & Rx_CH_AV) != 0) {
-
- stat = read_zsreg(info->private->zs_channel, R1);
- ch = read_zsdata(info->private->zs_channel);
-
-#ifdef SCC_DEBUG
- printk("mac_SCC: receive_chars stat=%X char=%X \n", stat, ch);
-#endif
-
-#if 0 /* KGDB not yet supported */
- /* 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();
- continue;
- }
-#endif
-
- if (!tty)
- continue;
-
- if (tty->flip.count >= TTY_FLIPBUF_SIZE)
- tty_flip_buffer_push(tty);
-
- if (stat & Rx_OVR) {
- flag = TTY_OVERRUN;
- /* reset the error indication */
- write_zsreg(info->private->zs_channel, 0, ERR_RES);
- } else if (stat & FRM_ERR) {
- /* this error is not sticky */
- flag = TTY_FRAME;
- } else if (stat & PAR_ERR) {
- flag = TTY_PARITY;
- /* reset the error indication */
- write_zsreg(info->private->zs_channel, 0, ERR_RES);
- } else
- flag = 0;
-
- if (tty->flip.buf_num
- && tty->flip.count >= TTY_FLIPBUF_SIZE) {
-#ifdef SCC_DEBUG_OVERRUN
- printk("mac_SCC: flip buffer overrun!\n");
-#endif
- return;
- }
-
- if (!tty->flip.buf_num
- && tty->flip.count >= 2*TTY_FLIPBUF_SIZE) {
- printk("mac_SCC: double flip buffer overrun!\n");
- return;
- }
-
- tty->flip.count++;
- *tty->flip.flag_buf_ptr++ = flag;
- *tty->flip.char_buf_ptr++ = ch;
- info->icount.rx++;
- tty_flip_buffer_push(tty);
- }
-#if 0
-clear_and_exit:
- SCC_recv_clear(info->private->zs_channel);
-#endif
-}
-
-/* that's SCC_enable_tx_int, basically */
-
-static void transmit_chars(struct m68k_async_struct *info)
-{
- if ((read_zsreg(info->private->zs_channel, 0) & Tx_BUF_EMP) == 0)
- return;
- info->private->tx_active = 0;
-
- if (info->x_char) {
- /* Send next char */
- write_zsdata(info->private->zs_channel, info->x_char);
- info->x_char = 0;
- info->private->tx_active = 1;
- return;
- }
-
- if ((info->xmit_cnt <= 0) || info->tty->stopped
- || info->private->tx_stopped) {
- write_zsreg(info->private->zs_channel, 0, RES_Tx_P);
- return;
- }
-
- /* Send char */
- write_zsdata(info->private->zs_channel, info->xmit_buf[info->xmit_tail++]);
- info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
- info->icount.tx++;
- info->xmit_cnt--;
- info->private->tx_active = 1;
-
- if (info->xmit_cnt < WAKEUP_CHARS)
- rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
-}
-
-static /*_INLINE_*/ void status_handle(struct m68k_async_struct *info)
-{
- unsigned char status;
-
- /* Get status from Read Register 0 */
- status = read_zsreg(info->private->zs_channel, 0);
-
- /* Check for DCD transitions */
- if (((status ^ info->private->read_reg_zero) & DCD) != 0
- && info->tty && C_CLOCAL(info->tty)) {
- if (status & DCD) {
- wake_up_interruptible(&info->open_wait);
- } else if (!(info->flags & ZILOG_CALLOUT_ACTIVE)) {
- if (info->tty)
- tty_hangup(info->tty);
- }
- }
-
- /* Check for CTS transitions */
- if (info->tty && C_CRTSCTS(info->tty)) {
- /*
- * For some reason, on the Power Macintosh,
- * it seems that the CTS bit is 1 when CTS is
- * *negated* and 0 when it is asserted.
- * The DCD bit doesn't seem to be inverted
- * like this.
- */
- if ((status & CTS) == 0) {
- if (info->private->tx_stopped) {
- info->private->tx_stopped = 0;
- if (!info->private->tx_active)
- transmit_chars(info);
- }
- } else {
- info->private->tx_stopped = 1;
- }
- }
-
- /* Clear status condition... */
- write_zsreg(info->private->zs_channel, 0, RES_EXT_INT);
- info->private->read_reg_zero = status;
-}
-
-/*
- * This is the serial driver's generic interrupt routine
- */
-void mac_SCC_interrupt(int irq, void *dev_id, struct pt_regs * regs)
-{
- struct m68k_async_struct *info = (struct m68k_async_struct *) dev_id;
- unsigned char zs_intreg;
- int shift;
-
- /* NOTE: The read register 3, which holds the irq status,
- * does so for both channels on each chip. Although
- * the status value itself must be read from the A
- * channel and is only valid when read from channel A.
- * Yes... broken hardware...
- */
-#define CHAN_IRQMASK (CHBRxIP | CHBTxIP | CHBEXT)
-
-#ifdef SCC_DEBUG
- printk("mac_SCC: interrupt; port: %lx channel: %lx \n",
- info->port, info->private->zs_channel);
-#endif
-
- if (info->private->zs_chan_a == info->private->zs_channel)
- shift = 3; /* Channel A */
- else
- shift = 0; /* Channel B */
-
- for (;;) {
- zs_intreg = read_zsreg(info->private->zs_chan_a, 3);
-#ifdef SCC_DEBUG
- printk("mac_SCC: status %x shift %d shifted %x \n",
- zs_intreg, shift, zs_intreg >> shift);
-#endif
- zs_intreg = zs_intreg >> shift;
- if ((zs_intreg & CHAN_IRQMASK) == 0)
- break;
-
- if (zs_intreg & CHBRxIP)
- receive_chars(info, regs);
- if (zs_intreg & CHBTxIP)
- transmit_chars(info);
- if (zs_intreg & CHBEXT)
- status_handle(info);
- }
-}
-
-/*
- * -------------------------------------------------------------------
- * Here ends the serial interrupt routines.
- * -------------------------------------------------------------------
- */
-
-/*
- * ------------------------------------------------------------
- * rs_stop() and rs_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * ------------------------------------------------------------
- */
-
-static void SCC_enab_tx_int( struct m68k_async_struct *info, int enab_flag )
-{
- unsigned long flags;
-
- if (enab_flag) {
-#if 0
- save_flags(flags); cli();
- if (info->private->curregs[5] & TxENAB) {
- info->private->curregs[5] &= ~TxENAB;
- info->private->pendregs[5] &= ~TxENAB;
- write_zsreg(info->private->zs_channel, 5,
- info->private->curregs[5]);
- }
- restore_flags(flags);
-#endif
- /* FIXME: should call transmit_chars here ??? */
- transmit_chars(info);
- } else {
- save_flags(flags); cli();
-#if 0
- if ( info->xmit_cnt && info->xmit_buf &&
- !(info->private->curregs[5] & TxENAB)) {
- info->private->curregs[5] |= TxENAB;
- info->private->pendregs[5] = info->private->curregs[5];
- write_zsreg(info->private->zs_channel, 5,
- info->private->curregs[5]);
- }
-#else
- if ( info->xmit_cnt && info->xmit_buf &&
- !info->private->tx_active) {
- transmit_chars(info);
- }
-#endif
- restore_flags(flags);
- }
-
-}
-
-#if 0
-/*
- * leftover from original driver ...
- */
-static int SCC_startup(struct m68k_async_struct * info)
-{
- unsigned long flags;
-
- save_flags(flags); cli();
-
-#ifdef SERIAL_DEBUG_OPEN
- printk("starting up ttyS%d (irq %d)...", info->line, info->irq);
-#endif
-
- /*
- * Clear the receive FIFO.
- */
- ZS_CLEARFIFO(info->private->zs_channel);
- info->xmit_fifo_size = 1;
-
- /*
- * Clear the interrupt registers.
- */
- write_zsreg(info->private->zs_channel, 0, ERR_RES);
- write_zsreg(info->private->zs_channel, 0, RES_H_IUS);
-
- /*
- * Turn on RTS and DTR.
- */
- zs_rtsdtr(info, 1);
-
- /*
- * Finally, enable sequencing and interrupts
- */
- info->private->curregs[1] = (info->private->curregs[1] & ~0x18)
- | (EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB);
- info->private->pendregs[1] = info->private->curregs[1];
- info->private->curregs[3] |= (RxENABLE | Rx8);
- info->private->pendregs[3] = info->private->curregs[3];
- info->private->curregs[5] |= (TxENAB | Tx8);
- info->private->pendregs[5] = info->private->curregs[5];
- info->private->curregs[9] |= (NV | MIE);
- info->private->pendregs[9] = info->private->curregs[9];
- write_zsreg(info->private->zs_channel, 3, info->private->curregs[3]);
- write_zsreg(info->private->zs_channel, 5, info->private->curregs[5]);
- write_zsreg(info->private->zs_channel, 9, info->private->curregs[9]);
-
- /*
- * Set the speed of the serial port
- */
- SCC_change_speed(info);
-
- /* Save the current value of RR0 */
- info->private->read_reg_zero = read_zsreg(info->private->zs_channel, 0);
-
- restore_flags(flags);
- return 0;
-}
-#endif
-
-/* FIXME: are these required ?? */
-static int SCC_check_open( struct m68k_async_struct *info, struct tty_struct *tty,
- struct file *file )
-{
- /* check on the basis of info->whatever ?? */
- if (info->private->kgdb_channel || info->private->is_cons)
- return -EBUSY;
- return( 0 );
-}
-
-static void SCC_init( struct m68k_async_struct *info )
-{
- /* FIXME: init currently done in probe_sccs() */
-
- /* BUT: startup part needs to be done here! */
-
-#ifdef SCC_DEBUG
- printk("mac_SCC: init, info %lx, info->port %lx \n", info, info->port);
-#endif
- /*
- * Clear the receive FIFO.
- */
- ZS_CLEARFIFO(info->private->zs_channel);
- info->xmit_fifo_size = 1;
-
- /*
- * Clear the interrupt registers.
- */
- write_zsreg(info->private->zs_channel, 0, ERR_RES);
- write_zsreg(info->private->zs_channel, 0, RES_H_IUS);
-
- /*
- * Turn on RTS and DTR.
- */
- zs_rtsdtr(info, 1);
-
- /*
- * Finally, enable sequencing and interrupts
- */
- info->private->curregs[1] = (info->private->curregs[1] & ~0x18)
- | (EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB);
- info->private->pendregs[1] = info->private->curregs[1];
- info->private->curregs[3] |= (RxENABLE | Rx8);
- info->private->pendregs[3] = info->private->curregs[3];
- info->private->curregs[5] |= (TxENAB | Tx8);
- info->private->pendregs[5] = info->private->curregs[5];
- info->private->curregs[9] |= (NV | MIE);
- info->private->pendregs[9] = info->private->curregs[9];
- write_zsreg(info->private->zs_channel, 3, info->private->curregs[3]);
- write_zsreg(info->private->zs_channel, 5, info->private->curregs[5]);
- write_zsreg(info->private->zs_channel, 9, info->private->curregs[9]);
-
- /*
- * Set the speed of the serial port - done in startup() !!
- */
-#if 0
- SCC_change_speed(info);
-#endif
-
- /* Save the current value of RR0 */
- info->private->read_reg_zero = read_zsreg(info->private->zs_channel, 0);
-
-}
-
-static void SCC_init_port( struct m68k_async_struct *info, int type, int channel )
-{
- static int got_autovector = 0;
-
-#ifdef SCC_DEBUG
- printk("mac_SCC: init_port, info %x \n", info);
-#endif
- info->sw = &SCC_switch;
- info->private = &zs_soft_private[channel];
- info->private->zs_channel = &zs_channels[channel];
- info->irq = IRQ4;
- info->private->clk_divisor = 16;
- info->private->zs_baud = get_zsbaud(info);
- info->port = (int) info->private->zs_channel->control;
-
- /*
- * MSch: Extended interrupt scheme:
- * The generic m68k interrupt code can't use multiple handlers for
- * the same interrupt source (no chained interrupts).
- * We have to plug in a 'master' interrupt handler instead, calling
- * mac_SCC_interrupt with the proper arguments ...
- */
-
- if (!got_autovector) {
- if(sys_request_irq(IRQ4, mac_SCC_handler, 0, "SCC master", info))
- panic("macserial: can't get irq %d", IRQ4);
-#ifdef SCC_DEBUG
- printk("mac_SCC: got SCC master interrupt %d, channel %d info %p\n",
- IRQ4, channel, info);
-#endif
- got_autovector = 1;
- }
-
- if (info->private->zs_chan_a == info->private->zs_channel) {
- /* Channel A */
- if (request_irq(IRQ_SCCA, mac_SCC_interrupt, 0, "SCC A", info))
- panic("mac_SCC: can't get irq %d", IRQ_SCCA);
-#ifdef SCC_DEBUG
- printk("mac_SCC: got SCC A interrupt %d, channel %d info %p\n",
- IRQ_SCCA, channel, info);
-#endif
- } else {
- /* Channel B */
- if (request_irq(IRQ_SCCB, mac_SCC_interrupt, 0, "SCC B", info))
- panic("mac_SCC: can't get irq %d", IRQ_SCCB);
-#ifdef SCC_DEBUG
- printk("mac_SCC: got SCC B interrupt %d, channel %d info %p\n",
- IRQ_SCCB, channel, info);
-#endif
- }
-
- /* If console serial line, then enable interrupts. */
- if (info->private->is_cons) {
- printk("mac_SCC: console line %d; enabling interrupt!\n", info->line);
- write_zsreg(info->private->zs_channel, R1,
- (EXT_INT_ENAB | INT_ALL_Rx | TxINT_ENAB));
- write_zsreg(info->private->zs_channel, R9, (NV | MIE));
- write_zsreg(info->private->zs_channel, R10, (NRZ));
- write_zsreg(info->private->zs_channel, R3, (Rx8 | RxENABLE));
- write_zsreg(info->private->zs_channel, R5, (Tx8 | TxENAB));
- }
- /* 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.
- */
- if (info->private->kgdb_channel) {
- printk("mac_SCC: kgdb line %d; enabling interrupt!\n", info->line);
- kgdb_chaninit(info, 1, info->private->zs_baud);
- }
- /* Report settings (in m68kserial.c) */
-#ifndef CONFIG_MAC
- printk("ttyS%d at 0x%08x (irq = %d)", info->line,
- info->port, info->irq);
- printk(" is a Z8530 SCC\n");
-#endif
-
-}
-
-/*
- * 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 SCC_deinit(struct m68k_async_struct * info, int leave_dtr)
-{
- unsigned long flags;
-
- save_flags(flags); cli(); /* Disable interrupts */
-
- info->private->pendregs[1] = info->private->curregs[1] = 0;
- write_zsreg(info->private->zs_channel, 1, 0); /* no interrupts */
-
- info->private->curregs[3] &= ~RxENABLE;
- info->private->pendregs[3] = info->private->curregs[3];
- write_zsreg(info->private->zs_channel, 3, info->private->curregs[3]);
-
- info->private->curregs[5] &= ~TxENAB;
-
- if (!leave_dtr)
- info->private->curregs[5] &= ~(DTR | RTS);
- else
- info->private->curregs[5] &= ~(RTS);
-
- info->private->pendregs[5] = info->private->curregs[5];
- write_zsreg(info->private->zs_channel, 5, info->private->curregs[5]);
-
- restore_flags(flags);
-}
-
-/* FIXME !!! */
-static int SCC_check_custom_divisor( struct m68k_async_struct *info,
- int baud_base, int divisor )
-{
- return 0;
-}
-
-/*
- * This routine is called to set the UART divisor registers to match
- * the specified baud rate for a serial port.
- */
-static void SCC_change_speed(struct m68k_async_struct *info)
-{
- unsigned short port;
- unsigned cflag;
- int i;
- int brg;
- unsigned long flags;
-
- if (!info->tty || !info->tty->termios)
- return;
- cflag = info->tty->termios->c_cflag;
- if (!(port = info->port))
- return;
- i = cflag & CBAUD;
-
- if (i == 0 && !(info->flags & ASYNC_SPD_MASK)) {
- /* speed == 0 -> drop DTR */
- save_flags(flags);
- cli();
- info->private->curregs[5] &= ~(DTR | RTS);
- write_zsreg(info->private->zs_channel, 5, info->private->curregs[5]);
- restore_flags(flags);
- return;
- }
-
-
- if (i & CBAUDEX) {
- /* XXX CBAUDEX is not obeyed.
- * It is impossible at a 32bits PPC. XXX??
- * But we have to report this to user ... someday.
- */
- i = B9600;
- }
-
- save_flags(flags); cli();
- info->private->zs_baud = baud_table[i];
- info->private->clk_divisor = 16;
-
- info->private->curregs[4] = X16CLK;
- info->private->curregs[11] = TCBR | RCBR;
- brg = BPS_TO_BRG(info->private->zs_baud,
- ZS_CLOCK/info->private->clk_divisor);
- info->private->curregs[12] = (brg & 255);
- info->private->curregs[13] = ((brg >> 8) & 255);
- info->private->curregs[14] = BRENABL;
-
- /* byte size and parity */
- info->private->curregs[3] &= ~RxNBITS_MASK;
- info->private->curregs[5] &= ~TxNBITS_MASK;
- switch (cflag & CSIZE) {
- case CS5:
- info->private->curregs[3] |= Rx5;
- info->private->curregs[5] |= Tx5;
- break;
- case CS6:
- info->private->curregs[3] |= Rx6;
- info->private->curregs[5] |= Tx6;
- break;
- case CS7:
- info->private->curregs[3] |= Rx7;
- info->private->curregs[5] |= Tx7;
- break;
- case CS8:
- default: /* defaults to 8 bits */
- info->private->curregs[3] |= Rx8;
- info->private->curregs[5] |= Tx8;
- break;
- }
- info->private->pendregs[3] = info->private->curregs[3];
- info->private->pendregs[5] = info->private->curregs[5];
-
- info->private->curregs[4] &= ~(SB_MASK | PAR_ENA | PAR_EVEN);
- if (cflag & CSTOPB) {
- info->private->curregs[4] |= SB2;
- } else {
- info->private->curregs[4] |= SB1;
- }
- if (cflag & PARENB) {
- info->private->curregs[4] |= PAR_ENA;
- }
- if (!(cflag & PARODD)) {
- info->private->curregs[4] |= PAR_EVEN;
- }
- info->private->pendregs[4] = info->private->curregs[4];
-
- info->private->curregs[15] &= ~(DCDIE | CTSIE);
- if (!(cflag & CLOCAL)) {
- info->private->curregs[15] |= DCDIE;
- }
- if (cflag & CRTSCTS) {
- info->private->curregs[15] |= CTSIE;
- if ((read_zsreg(info->private->zs_channel, 0) & CTS) != 0)
- info->private->tx_stopped = 1;
- } else
- info->private->tx_stopped = 0;
- info->private->pendregs[15] = info->private->curregs[15];
-
- /* Load up the new values */
- load_zsregs(info->private->zs_channel, info->private->curregs);
-
- restore_flags(flags);
-}
-
-/* This is for console output over ttya/ttyb */
-static void SCC_put_char(char ch)
-{
- struct mac_zschannel *chan = zs_conschan;
- int loops = 0;
- unsigned long flags;
-
- if(!chan)
- return;
-
- save_flags(flags); cli();
- while ((read_zsreg(chan, 0) & Tx_BUF_EMP) == 0 && loops < 10000) {
- loops++;
- udelay(5);
- }
- write_zsdata(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 mac_zschannel *chan = zs_kgdbchan;
-
- while ((read_zsreg(chan, 0) & Tx_BUF_EMP) == 0)
- udelay(5);
- write_zsdata(chan, kgdb_char);
-}
-
-char getDebugChar(void)
-{
- struct mac_zschannel *chan = zs_kgdbchan;
-
- while ((read_zsreg(chan, 0) & Rx_CH_AV) == 0)
- udelay(5);
- return read_zsdata(chan);
-}
-
-/*
- * Fair output driver allows a process to speak.
- */
-static void SCC_fair_output(void)
-{
- int left; /* Output no more than that */
- unsigned long flags;
- struct m68k_async_struct *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);
-
- SCC_put_char(c);
-
- save_flags(flags); cli();
- left = MIN(info->xmit_cnt, left-1);
- }
-
- restore_flags(flags);
- return;
-}
-
-/*
- * zs_console_print is registered for printk.
- */
-static void zs_console_print(const char *p)
-{
- char c;
-
- while ((c = *(p++)) != 0) {
- if (c == '\n')
- SCC_put_char('\r');
- SCC_put_char(c);
- }
-
- /* Comment this if you want to have a strict interrupt-driven output */
- SCC_fair_output();
-}
-
-/* FIXME: check with SCC_enab_tx_int!! */
-#if 0
-static void rs_flush_chars(struct tty_struct *tty)
-{
- struct m68k_async_struct *info = (struct m68k_async_struct *)tty->driver_data;
- unsigned long flags;
-
- if (serial_paranoia_check(info, tty->device, "rs_flush_chars"))
- return;
-
- if (info->xmit_cnt <= 0 || tty->stopped || info->private->tx_stopped ||
- !info->xmit_buf)
- return;
-
- /* Enable transmitter */
- save_flags(flags); cli();
- transmit_chars(info);
- 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 m68k_async_struct *info = (struct m68k_async_struct *)tty->driver_data;
- unsigned long flags;
-
- if (serial_paranoia_check(info, tty->device, "rs_write"))
- return 0;
-
- if (!tty || !info->xmit_buf)
- 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);
- memcpy_fromfs(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 && !info->tx_stopped
- && !info->tx_active)
- transmit_chars(info);
- restore_flags(flags);
- return total;
-}
-#endif
-
-/*
- * ------------------------------------------------------------
- * rs_throttle()
- *
- * This routine is called by the upper-layer tty layer to signal that
- * incoming characters should be throttled.
- * ------------------------------------------------------------
- */
-static void SCC_throttle(struct m68k_async_struct *info, int status)
-{
- unsigned long flags;
-
- save_flags(flags);
- cli();
-
- if (status) {
- /*
- * Here we want to turn off the RTS line. On Macintoshes,
- * we only get the DTR line, which goes to both DTR and
- * RTS on the modem. RTS doesn't go out to the serial
- * port socket. So you should make sure your modem is
- * set to ignore DTR if you're using CRTSCTS.
- */
- info->private->curregs[5] &= ~(DTR | RTS);
- info->private->pendregs[5] &= ~(DTR | RTS);
- write_zsreg(info->private->zs_channel, 5,
- info->private->curregs[5]);
- } else {
- /* Assert RTS and DTR lines */
- info->private->curregs[5] |= DTR | RTS;
- info->private->pendregs[5] |= DTR | RTS;
- write_zsreg(info->private->zs_channel, 5,
- info->private->curregs[5]);
- }
-
- restore_flags(flags);
-
-}
-
-/*
- * ------------------------------------------------------------
- * rs_ioctl() and friends
- * ------------------------------------------------------------
- */
-
-static void SCC_get_serial_info(struct m68k_async_struct * info,
- struct serial_struct * retinfo)
-{
- retinfo->baud_base = info->baud_base;
- retinfo->custom_divisor = info->custom_divisor;
-}
-
-/* FIXME: set_serial_info needs check_custom_divisor !!! */
-
-/*
- * 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 SCC_get_lsr_info(struct m68k_async_struct * info, unsigned int *value)
-{
- unsigned char status;
-
- cli();
- status = read_zsreg(info->private->zs_channel, 0);
- sti();
- return status;
-}
-
-static unsigned int SCC_get_modem_info(struct m68k_async_struct *info)
-{
- unsigned char control, status;
- unsigned int result;
-
- cli();
- control = info->private->curregs[5];
- status = read_zsreg(info->private->zs_channel, 0);
- sti();
- result = ((control & RTS) ? TIOCM_RTS: 0)
- | ((control & DTR) ? TIOCM_DTR: 0)
- | ((status & DCD) ? TIOCM_CAR: 0)
- | ((status & CTS) ? 0: TIOCM_CTS);
- return result;
-}
-
-/* FIXME: zs_setdtr was used in rs_open ... */
-
-static int SCC_set_modem_info(struct m68k_async_struct *info,
- int new_dtr, int new_rts)
-{
- unsigned int bits;
-
- bits = (new_rts ? RTS: 0) + (new_dtr ? DTR: 0);
- info->private->curregs[5] = (info->private->curregs[5] & ~(DTR | RTS)) | bits;
- info->private->pendregs[5] = info->private->curregs[5];
- write_zsreg(info->private->zs_channel, 5, info->private->curregs[5]);
- sti();
- return 0;
-}
-
-/*
- * This routine sends a break character out the serial port.
- */
-static void SCC_set_break(struct m68k_async_struct * info, int break_flag)
-{
- unsigned long flags;
-
- save_flags(flags);
- cli();
-
- if (break_flag) {
- info->private->curregs[5] |= SND_BRK;
- write_zsreg(info->private->zs_channel, 5,
- info->private->curregs[5]);
- } else {
- info->private->curregs[5] &= ~SND_BRK;
- write_zsreg(info->private->zs_channel, 5,
- info->private->curregs[5]);
- }
-
- restore_flags(flags);
-}
-
-/* FIXME: these have to be enabled in rs_ioctl !! */
-
-static int SCC_ioctl(struct tty_struct *tty, struct file * file,
- struct m68k_async_struct * info, unsigned int cmd,
- unsigned long arg)
-{
- int error;
-
- switch (cmd) {
- case TIOCSERGETLSR: /* Get line status register */
- error = verify_area(VERIFY_WRITE, (void *) arg,
- sizeof(unsigned int));
- if (error)
- return error;
- else
- return SCC_get_lsr_info(info, (unsigned int *) arg);
-
- case TIOCSERGSTRUCT:
- error = verify_area(VERIFY_WRITE, (void *) arg,
- sizeof(struct m68k_async_struct));
- if (error)
- return error;
- copy_to_user((struct m68k_async_struct *) arg,
- info, sizeof(struct m68k_async_struct));
- return 0;
-
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
-}
-
-static void SCC_stop_receive (struct m68k_async_struct *info)
-{
- /* disable Rx */
- info->private->curregs[3] &= ~RxENABLE;
- info->private->pendregs[3] = info->private->curregs[3];
- write_zsreg(info->private->zs_channel, 3, info->private->curregs[3]);
- /* disable Rx interrupts */
- info->private->curregs[1] &= ~(0x18); /* disable any rx ints */
- info->private->pendregs[1] = info->private->curregs[1];
- write_zsreg(info->private->zs_channel, 1, info->private->curregs[1]);
- ZS_CLEARFIFO(info->private->zs_channel);
-}
-
-static int SCC_trans_empty (struct m68k_async_struct *info)
-{
- return (read_zsreg(info->private->zs_channel, 1) & ALL_SNT) != 0;
-}
-
-/* Finally, routines used to initialize the serial driver. */
-
-#ifdef CONFIG_MAC
-
-/*
- * Mac: use boot_info data; assume 2 channels
- */
-
-static void probe_sccs(void)
-{
- int n;
-
-#define ZS_CONTROL 0x50F04000
-#define ZS_DATA (ZS_CONTROL+4)
-#define ZS_IRQ 5
-#define ZS_MOVE -2
-#define ZS_DATA_MOVE 4
-#define ZS_CH_A_FIRST 2
-
- /* last-ditch fixup for NetBSD booter case */
- if (mac_bi_data.sccbase == 0)
- mac_bi_data.sccbase = ZS_CONTROL;
-
- /* testing: fix up broken 24 bit addresses (ClassicII) */
- if ((mac_bi_data.sccbase & 0x00FFFFFF) == mac_bi_data.sccbase)
- mac_bi_data.sccbase |= 0x50000000;
-
- if ( !hwreg_present((void *)mac_bi_data.sccbase))
- {
- printk(KERN_WARNING "z8530: Serial devices not accessible. Check serial switch.\n");
- return;
- }
-
- for(n=0;n<2;n++)
- {
-#if 0
- zs_channels[n].control = (volatile unsigned char *)
- ZS_CONTROL+ZS_MOVE*n;
- zs_channels[n].data = (volatile unsigned char *)ZS_DATA+ZS_MOVE*n;
-#else
- zs_channels[n].control = (volatile unsigned char *) /* 2, 0 */
- (mac_bi_data.sccbase+ZS_CH_A_FIRST)+ZS_MOVE*n;
- zs_channels[n].data = (volatile unsigned char *) /* 6, 4 */
- (mac_bi_data.sccbase+ZS_CH_A_FIRST+ZS_DATA_MOVE)+ZS_MOVE*n;
-#endif
- zs_soft[n].private = &zs_soft_private[n];
- zs_soft[n].private->zs_channel = &zs_channels[n];
- zs_soft[n].irq = IRQ4;
-#if 0
- if (request_irq(ch->intrs[0], rs_interrupt, 0,
- "SCC", &zs_soft[n]))
- panic("macserial: can't get irq %d",
- ch->intrs[0]);
-#endif
- if (n & 1)
- zs_soft[n].private->zs_chan_a = &zs_channels[n-1];
- else
- zs_soft[n].private->zs_chan_a = &zs_channels[n];
- }
-
- zs_channels_found=2;
-}
-
-#else
-
-/*
- * PowerMAC - query the PROM
- */
-
-static void show_serial_version(void)
-{
- printk("PowerMac Z8530 serial driver version 1.00\n");
-}
-
-/* Ask the PROM how many Z8530s we have and initialize their zs_channels */
-static void
-probe_sccs()
-{
- struct device_node *dev, *ch;
- struct m68k_async_struct **pp;
- int n;
-
- n = 0;
- pp = &zs_chain;
- for (dev = find_devices("escc"); dev != 0; dev = dev->next) {
- if (n >= NUM_CHANNELS) {
- printk("Sorry, can't use %s: no more channels\n",
- dev->full_name);
- continue;
- }
- for (ch = dev->child; ch != 0; ch = ch->sibling) {
- if (ch->n_addrs < 1 || ch ->n_intrs < 1) {
- printk("Can't use %s: %d addrs %d intrs\n",
- ch->full_name, ch->n_addrs, ch->n_intrs);
- continue;
- }
- zs_channels[n].control = (volatile unsigned char *)
- ch->addrs[0].address;
- zs_channels[n].data = zs_channels[n].control
- + ch->addrs[0].size / 2;
- zs_soft[n].private = &zs_soft_private[n];
- zs_soft[n].private->zs_channel = &zs_channels[n];
- zs_soft[n].irq = ch->intrs[0];
- if (request_irq(ch->intrs[0], mac_SCC_interrupt, 0,
- "SCC", &zs_soft[n]))
- panic("macserial: can't get irq %d",
- ch->intrs[0]);
- /* XXX this assumes the prom puts chan A before B */
- if (n & 1)
- zs_soft[n].private->zs_chan_a = &zs_channels[n-1];
- else
- zs_soft[n].private->zs_chan_a = &zs_channels[n];
-
- *pp = &zs_soft[n];
- pp = &zs_soft[n].private->zs_next;
- ++n;
- }
- }
- *pp = 0;
- zs_channels_found = n;
-}
-
-#endif
-
-extern void register_console(void (*proc)(const char *));
-
-static inline void
-rs_cons_check(struct m68k_async_struct *ss, int channel)
-{
- int i, o, io;
- static int consout_registered = 0;
- static int msg_printed = 0;
-
- 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->private->zs_channel;
- zs_consinfo = ss;
-
- /* Register the console output putchar, if necessary */
- if (zs_cons_chanout == channel) {
- o = 1;
- /* double whee.. */
- if (!consout_registered) {
- register_console(zs_console_print);
- consout_registered = 1;
- }
- }
-
- if (zs_cons_chanin == channel) {
- i = 1;
- }
- if (o && i)
- io = 1;
- if (ss->private->zs_baud != 9600)
- panic("Console baud rate weirdness");
-
- /* Set flag variable for this port so that it cannot be
- * opened for other uses by accident.
- */
- ss->private->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")));
- }
-
- /* FIXME : register interrupt here??? */
-}
-
-volatile int test_done;
-
-/* rs_init inits the driver */
-int mac_SCC_init(void)
-{
- int channel, line, nr = 0;
- unsigned long flags;
- struct serial_struct req;
-
- printk("Mac68K Z8530 serial driver version 1.01\n");
-
- /* SCC present at all? */
- if (!MACH_IS_MAC)
- return( -ENODEV );
-
- if (zs_chain == 0)
- probe_sccs();
-
- save_flags(flags);
- cli();
-
- /*
- * FIXME: init of rs_table entry and register_serial now done,
- * but possible clash of zs_soft[channel] and rs_table[channel]!!
- * zs_soft initialized in probe_sccs(), some settings copied to
- * info = &rs_table[channel], which is used by the mid-level code.
- * The info->private part is shared among both!
- */
-
- for (channel = 0; channel < zs_channels_found; ++channel) {
- req.line = channel;
- req.type = SER_SCC_MAC;
- req.port = (int) zs_soft[channel].private->zs_channel->control;
-
- if ((line = register_serial( &req )) >= 0) {
- SCC_init_port( &rs_table[line], req.type, line );
- ++nr;
- }
- else
- printk(KERN_WARNING "Cannot allocate ttyS%d for SCC channel A\n", req.line );
- }
-
- restore_flags(flags);
-
- return( nr > 0 ? 0 : -ENODEV );
-}
-
-/* Hooks for running a serial console. con_init() calls this if the
- * console is being run over one of the serial ports.
- * 'channel' is decoded as 0=modem 1=printer, 'chip' is ignored.
- */
-void
-rs_cons_hook(int chip, int out, int channel)
-{
- if (zs_chain == 0)
- probe_sccs();
- zs_soft[channel].private->clk_divisor = 16;
- zs_soft[channel].private->zs_baud = get_zsbaud(&zs_soft[channel]);
- rs_cons_check(&zs_soft[channel], channel);
- if (out)
- zs_cons_chanout = channel;
- else
- zs_cons_chanin = channel;
-
- /* FIXME : register interrupt here??? */
-}
-
-/* This is called at boot time to prime the kgdb serial debugging
- * serial line. The 'tty_num' argument is 0 for /dev/ttyS0 and 1
- * for /dev/ttyS1 which is determined in setup_arch() from the
- * boot command line flags.
- */
-void
-rs_kgdb_hook(int tty_num)
-{
- if (zs_chain == 0)
- probe_sccs();
- zs_kgdbchan = zs_soft[tty_num].private->zs_channel;
- zs_soft[tty_num].private->clk_divisor = 16;
- zs_soft[tty_num].private->zs_baud = get_zsbaud(&zs_soft[tty_num]);
- zs_soft[tty_num].private->kgdb_channel = 1; /* This runs kgdb */
- zs_soft[tty_num ^ 1].private->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);
-
- /* FIXME : register interrupt here??? */
-}
-
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)