patch-2.1.125 linux/drivers/char/serial167.c
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- Lines: 2985
- Date:
Mon Oct 5 14:12:12 1998
- Orig file:
v2.1.124/linux/drivers/char/serial167.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.1.124/linux/drivers/char/serial167.c linux/drivers/char/serial167.c
@@ -0,0 +1,2984 @@
+/*
+ * linux/drivers/char/serial167.c
+ *
+ * Driver for MVME166/7 board serial ports, which are via a CD2401.
+ * Based very much on cyclades.c.
+ *
+ * MVME166/7 work by Richard Hirst [richard@sleepie.demon.co.uk]
+ *
+ * ==============================================================
+ *
+ * static char rcsid[] =
+ * "$Revision: 1.36.1.4 $$Date: 1995/03/29 06:14:14 $";
+ *
+ * linux/kernel/cyclades.c
+ *
+ * Maintained by Marcio Saito (cyclades@netcom.com) and
+ * Randolph Bentson (bentson@grieg.seaslug.org)
+ *
+ * Much of the design and some of the code came from serial.c
+ * which was copyright (C) 1991, 1992 Linus Torvalds. It was
+ * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
+ * and then fixed as suggested by Michael K. Johnson 12/12/92.
+ *
+ * This version does not support shared irq's.
+ *
+ * This module exports the following rs232 io functions:
+ * int cy_init(void);
+ * int cy_open(struct tty_struct *tty, struct file *filp);
+ *
+ * $Log: cyclades.c,v $
+ * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
+ * disambiguate between Cyclom-16Y and Cyclom-32Ye;
+ *
+ * 200 lines of changes record removed - RGH 11-10-95, starting work on
+ * converting this to drive serial ports on mvme166 (cd2401).
+ */
+
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/tty.h>
+#include <linux/interrupt.h>
+#include <linux/serial.h>
+#include <linux/string.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/serial167.h>
+#include <linux/delay.h>
+#include <linux/major.h>
+#include <linux/mm.h>
+#include <linux/console.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/segment.h>
+#include <asm/bitops.h>
+#include <asm/mvme16xhw.h>
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+
+#include <linux/version.h>
+#include <asm/uaccess.h>
+#include <linux/init.h>
+
+#define cy_put_user put_user
+
+static unsigned long cy_get_user(unsigned long *addr)
+{
+ unsigned long result = 0;
+ int error = get_user (result, addr);
+ if (error)
+ printk ("serial167: cy_get_user: error == %d\n", error);
+ return result;
+}
+
+#define SERIAL_PARANOIA_CHECK
+#undef SERIAL_DEBUG_OPEN
+#undef SERIAL_DEBUG_THROTTLE
+#undef SERIAL_DEBUG_OTHER
+#undef SERIAL_DEBUG_IO
+#undef SERIAL_DEBUG_COUNT
+#undef SERIAL_DEBUG_DTR
+#undef CYCLOM_16Y_HACK
+#define CYCLOM_ENABLE_MONITORING
+
+#ifndef MIN
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
+
+#define WAKEUP_CHARS 256
+
+#define STD_COM_FLAGS (0)
+
+#define SERIAL_TYPE_NORMAL 1
+#define SERIAL_TYPE_CALLOUT 2
+
+
+DECLARE_TASK_QUEUE(tq_cyclades);
+
+struct tty_driver cy_serial_driver, cy_callout_driver;
+extern int serial_console;
+static struct cyclades_port *serial_console_info = NULL;
+static unsigned int serial_console_cflag = 0;
+u_char initial_console_speed;
+
+/* Base address of cd2401 chip on mvme166/7 */
+
+#define BASE_ADDR (0xfff45000)
+#define pcc2chip ((volatile u_char *)0xfff42000)
+#define PccSCCMICR 0x1d
+#define PccSCCTICR 0x1e
+#define PccSCCRICR 0x1f
+#define PccTPIACKR 0x25
+#define PccRPIACKR 0x27
+#define PccIMLR 0x3f
+
+/* This is the per-port data structure */
+struct cyclades_port cy_port[] = {
+ /* CARD# */
+ {-1 }, /* ttyS0 */
+ {-1 }, /* ttyS1 */
+ {-1 }, /* ttyS2 */
+ {-1 }, /* ttyS3 */
+};
+#define NR_PORTS (sizeof(cy_port)/sizeof(struct cyclades_port))
+
+static int serial_refcount;
+
+static struct tty_struct *serial_table[NR_PORTS];
+static struct termios *serial_termios[NR_PORTS];
+static struct termios *serial_termios_locked[NR_PORTS];
+
+
+/*
+ * tmp_buf is used as a temporary buffer by serial_write. We need to
+ * lock it in case the copy_from_user blocks while swapping in a page,
+ * and some other program tries to do a serial write at the same time.
+ * Since the lock will only come under contention when the system is
+ * swapping and available memory is low, it makes sense to share one
+ * buffer across all the serial ports, since it significantly saves
+ * memory if large numbers of serial ports are open.
+ */
+static unsigned char *tmp_buf = 0;
+static struct semaphore tmp_buf_sem = MUTEX;
+
+/*
+ * This is used to look up the divisor speeds and the timeouts
+ * We're normally limited to 15 distinct baud rates. The extra
+ * are accessed via settings in info->flags.
+ * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
+ * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
+ * HI VHI
+ */
+static int baud_table[] = {
+ 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
+ 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800,115200,150000,
+ 0};
+
+#if 0
+static char baud_co[] = { /* 25 MHz clock option table */
+ /* value => 00 01 02 03 04 */
+ /* divide by 8 32 128 512 2048 */
+ 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
+ 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+
+static char baud_bpr[] = { /* 25 MHz baud rate period table */
+ 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
+ 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15};
+#endif
+
+/* I think 166 brd clocks 2401 at 20MHz.... */
+
+/* These values are written directly to tcor, and >> 5 for writing to rcor */
+static u_char baud_co[] = { /* 20 MHz clock option table */
+ 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x60, 0x60, 0x40,
+ 0x40, 0x40, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+
+/* These values written directly to tbpr/rbpr */
+static u_char baud_bpr[] = { /* 20 MHz baud rate period table */
+ 0x00, 0xc0, 0x80, 0x58, 0x6c, 0x40, 0xc0, 0x81, 0x40, 0x81,
+ 0x57, 0x40, 0x81, 0x40, 0x81, 0x40, 0x2b, 0x20, 0x15, 0x10};
+
+static u_char baud_cor4[] = { /* receive threshold */
+ 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
+ 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07};
+
+
+
+static void shutdown(struct cyclades_port *);
+static int startup (struct cyclades_port *);
+static void cy_throttle(struct tty_struct *);
+static void cy_unthrottle(struct tty_struct *);
+static void config_setup(struct cyclades_port *);
+extern void console_print(const char *);
+#ifdef CYCLOM_SHOW_STATUS
+static void show_status(int);
+#endif
+
+#ifdef CONFIG_REMOTE_DEBUG
+static void debug_setup(void);
+void queueDebugChar (int c);
+int getDebugChar(void);
+
+#define DEBUG_PORT 1
+#define DEBUG_LEN 256
+
+typedef struct {
+ int in;
+ int out;
+ unsigned char buf[DEBUG_LEN];
+} debugq;
+
+debugq debugiq;
+#endif
+
+/*
+ * I have my own version of udelay(), as it is needed when initialising
+ * the chip, before the delay loop has been calibrated. Should probably
+ * reference one of the vmechip2 or pccchip2 counter for an accurate
+ * delay, but this wild guess will do for now.
+ */
+
+void my_udelay (long us)
+{
+ u_char x;
+ volatile u_char *p = &x;
+ int i;
+
+ while (us--)
+ for (i = 100; i; i--)
+ x |= *p;
+}
+
+static inline int
+serial_paranoia_check(struct cyclades_port *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 cyclades_port for (%d, %d) in %s\n";
+ static const char *badrange =
+ "Warning: cyclades_port out of range for (%d, %d) in %s\n";
+
+ if (!info) {
+ printk(badinfo, MAJOR(device), MINOR(device), routine);
+ return 1;
+ }
+
+ if( (long)info < (long)(&cy_port[0])
+ || (long)(&cy_port[NR_PORTS]) < (long)info ){
+ printk(badrange, MAJOR(device), MINOR(device), routine);
+ return 1;
+ }
+
+ if (info->magic != CYCLADES_MAGIC) {
+ printk(badmagic, MAJOR(device), MINOR(device), routine);
+ return 1;
+ }
+#endif
+ return 0;
+} /* serial_paranoia_check */
+
+#if 0
+/* The following diagnostic routines allow the driver to spew
+ information on the screen, even (especially!) during interrupts.
+ */
+void
+SP(char *data){
+ unsigned long flags;
+ save_flags(flags); cli();
+ console_print(data);
+ restore_flags(flags);
+}
+char scrn[2];
+void
+CP(char data){
+ unsigned long flags;
+ save_flags(flags); cli();
+ scrn[0] = data;
+ console_print(scrn);
+ restore_flags(flags);
+}/* CP */
+
+void CP1(int data) { (data<10)? CP(data+'0'): CP(data+'A'-10); }/* CP1 */
+void CP2(int data) { CP1((data>>4) & 0x0f); CP1( data & 0x0f); }/* CP2 */
+void CP4(int data) { CP2((data>>8) & 0xff); CP2(data & 0xff); }/* CP4 */
+void CP8(long data) { CP4((data>>16) & 0xffff); CP4(data & 0xffff); }/* CP8 */
+#endif
+
+/* This routine waits up to 1000 micro-seconds for the previous
+ command to the Cirrus chip to complete and then issues the
+ new command. An error is returned if the previous command
+ didn't finish within the time limit.
+ */
+u_short
+write_cy_cmd(volatile u_char *base_addr, u_char cmd)
+{
+ unsigned long flags;
+ volatile int i;
+
+ save_flags(flags); cli();
+ /* Check to see that the previous command has completed */
+ for(i = 0 ; i < 100 ; i++){
+ if (base_addr[CyCCR] == 0){
+ break;
+ }
+ my_udelay(10L);
+ }
+ /* if the CCR never cleared, the previous command
+ didn't finish within the "reasonable time" */
+ if ( i == 10 ) {
+ restore_flags(flags);
+ return (-1);
+ }
+
+ /* Issue the new command */
+ base_addr[CyCCR] = cmd;
+ restore_flags(flags);
+ return(0);
+} /* write_cy_cmd */
+
+
+/* cy_start and cy_stop provide software output flow control as a
+ function of XON/XOFF, software CTS, and other such stuff. */
+
+static void
+cy_stop(struct tty_struct *tty)
+{
+ struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+ volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
+ int channel;
+ unsigned long flags;
+
+#ifdef SERIAL_DEBUG_OTHER
+ printk("cy_stop ttyS%d\n", info->line); /* */
+#endif
+
+ if (serial_paranoia_check(info, tty->device, "cy_stop"))
+ return;
+
+ channel = info->line;
+
+ save_flags(flags); cli();
+ base_addr[CyCAR] = (u_char)(channel); /* index channel */
+ base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy);
+ restore_flags(flags);
+
+ return;
+} /* cy_stop */
+
+static void
+cy_start(struct tty_struct *tty)
+{
+ struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+ volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
+ int channel;
+ unsigned long flags;
+
+#ifdef SERIAL_DEBUG_OTHER
+ printk("cy_start ttyS%d\n", info->line); /* */
+#endif
+
+ if (serial_paranoia_check(info, tty->device, "cy_start"))
+ return;
+
+ channel = info->line;
+
+ save_flags(flags); cli();
+ base_addr[CyCAR] = (u_char)(channel);
+ base_addr[CyIER] |= CyTxMpty;
+ restore_flags(flags);
+
+ return;
+} /* cy_start */
+
+
+/*
+ * This routine is used by the interrupt handler to schedule
+ * processing in the software interrupt portion of the driver
+ * (also known as the "bottom half"). This can be called any
+ * number of times for any channel without harm.
+ */
+static inline void
+cy_sched_event(struct cyclades_port *info, int event)
+{
+ info->event |= 1 << event; /* remember what kind of event and who */
+ queue_task(&info->tqueue, &tq_cyclades); /* it belongs to */
+ mark_bh(CYCLADES_BH); /* then trigger event */
+} /* cy_sched_event */
+
+
+/* The real interrupt service routines are called
+ whenever the card wants its hand held--chars
+ received, out buffer empty, modem change, etc.
+ */
+static void
+cd2401_rxerr_interrupt(int irq, void *dev_id, struct pt_regs *fp)
+{
+ struct tty_struct *tty;
+ struct cyclades_port *info;
+ volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
+ unsigned char err, rfoc;
+ int channel;
+ char data;
+
+ /* determine the channel and change to that context */
+ channel = (u_short ) (base_addr[CyLICR] >> 2);
+ info = &cy_port[channel];
+ info->last_active = jiffies;
+
+ if ((err = base_addr[CyRISR]) & CyTIMEOUT) {
+ /* This is a receive timeout interrupt, ignore it */
+ base_addr[CyREOIR] = CyNOTRANS;
+ return;
+ }
+
+ /* Read a byte of data if there is any - assume the error
+ * is associated with this character */
+
+ if ((rfoc = base_addr[CyRFOC]) != 0)
+ data = base_addr[CyRDR];
+ else
+ data = 0;
+
+ /* if there is nowhere to put the data, discard it */
+ if(info->tty == 0) {
+ base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS;
+ return;
+ }
+ else { /* there is an open port for this data */
+ tty = info->tty;
+ if(err & info->ignore_status_mask){
+ base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS;
+ return;
+ }
+ if (tty->flip.count < TTY_FLIPBUF_SIZE){
+ tty->flip.count++;
+ if (err & info->read_status_mask){
+ if(err & CyBREAK){
+ *tty->flip.flag_buf_ptr++ = TTY_BREAK;
+ *tty->flip.char_buf_ptr++ = data;
+ if (info->flags & ASYNC_SAK){
+ do_SAK(tty);
+ }
+ }else if(err & CyFRAME){
+ *tty->flip.flag_buf_ptr++ = TTY_FRAME;
+ *tty->flip.char_buf_ptr++ = data;
+ }else if(err & CyPARITY){
+ *tty->flip.flag_buf_ptr++ = TTY_PARITY;
+ *tty->flip.char_buf_ptr++ = data;
+ }else if(err & CyOVERRUN){
+ *tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
+ *tty->flip.char_buf_ptr++ = 0;
+ /*
+ If the flip buffer itself is
+ overflowing, we still loose
+ the next incoming character.
+ */
+ if(tty->flip.count < TTY_FLIPBUF_SIZE){
+ tty->flip.count++;
+ *tty->flip.flag_buf_ptr++ = TTY_NORMAL;
+ *tty->flip.char_buf_ptr++ = data;
+ }
+ /* These two conditions may imply */
+ /* a normal read should be done. */
+ /* else if(data & CyTIMEOUT) */
+ /* else if(data & CySPECHAR) */
+ }else{
+ *tty->flip.flag_buf_ptr++ = 0;
+ *tty->flip.char_buf_ptr++ = 0;
+ }
+ }else{
+ *tty->flip.flag_buf_ptr++ = 0;
+ *tty->flip.char_buf_ptr++ = 0;
+ }
+ }else{
+ /* there was a software buffer overrun
+ and nothing could be done about it!!! */
+ }
+ }
+ queue_task(&tty->flip.tqueue, &tq_timer);
+ /* end of service */
+ base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS;
+} /* cy_rxerr_interrupt */
+
+static void
+cd2401_modem_interrupt(int irq, void *dev_id, struct pt_regs *fp)
+{
+ struct cyclades_port *info;
+ volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
+ int channel;
+ int mdm_change;
+ int mdm_status;
+
+
+ /* determine the channel and change to that context */
+ channel = (u_short ) (base_addr[CyLICR] >> 2);
+ info = &cy_port[channel];
+ info->last_active = jiffies;
+
+ mdm_change = base_addr[CyMISR];
+ mdm_status = base_addr[CyMSVR1];
+
+ if(info->tty == 0){ /* nowhere to put the data, ignore it */
+ ;
+ }else{
+ if((mdm_change & CyDCD)
+ && (info->flags & ASYNC_CHECK_CD)){
+ if(mdm_status & CyDCD){
+/* CP('!'); */
+ cy_sched_event(info, Cy_EVENT_OPEN_WAKEUP);
+ }else if(!((info->flags & ASYNC_CALLOUT_ACTIVE)
+ &&(info->flags & ASYNC_CALLOUT_NOHUP))){
+/* CP('@'); */
+ cy_sched_event(info, Cy_EVENT_HANGUP);
+ }
+ }
+ if((mdm_change & CyCTS)
+ && (info->flags & ASYNC_CTS_FLOW)){
+ if(info->tty->stopped){
+ if(mdm_status & CyCTS){
+ /* !!! cy_start isn't used because... */
+ info->tty->stopped = 0;
+ base_addr[CyIER] |= CyTxMpty;
+ cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
+ }
+ }else{
+ if(!(mdm_status & CyCTS)){
+ /* !!! cy_stop isn't used because... */
+ info->tty->stopped = 1;
+ base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy);
+ }
+ }
+ }
+ if(mdm_status & CyDSR){
+ }
+ }
+ base_addr[CyMEOIR] = 0;
+} /* cy_modem_interrupt */
+
+static void
+cd2401_tx_interrupt(int irq, void *dev_id, struct pt_regs *fp)
+{
+ struct cyclades_port *info;
+ volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
+ int channel;
+ int char_count, saved_cnt;
+ int outch;
+
+ /* determine the channel and change to that context */
+ channel = (u_short ) (base_addr[CyLICR] >> 2);
+
+#ifdef CONFIG_REMOTE_DEBUG
+ if (channel == DEBUG_PORT) {
+ panic ("TxInt on debug port!!!");
+ }
+#endif
+
+ info = &cy_port[channel];
+
+ /* validate the port number (as configured and open) */
+ if( (channel < 0) || (NR_PORTS <= channel) ){
+ base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy);
+ base_addr[CyTEOIR] = CyNOTRANS;
+ return;
+ }
+ info->last_active = jiffies;
+ if(info->tty == 0){
+ base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy);
+ if (info->xmit_cnt < WAKEUP_CHARS) {
+ cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
+ }
+ base_addr[CyTEOIR] = CyNOTRANS;
+ return;
+ }
+
+ /* load the on-chip space available for outbound data */
+ saved_cnt = char_count = base_addr[CyTFTC];
+
+ if(info->x_char) { /* send special char */
+ outch = info->x_char;
+ base_addr[CyTDR] = outch;
+ char_count--;
+ info->x_char = 0;
+ }
+
+ if (info->x_break){
+ /* The Cirrus chip requires the "Embedded Transmit
+ Commands" of start break, delay, and end break
+ sequences to be sent. The duration of the
+ break is given in TICs, which runs at HZ
+ (typically 100) and the PPR runs at 200 Hz,
+ so the delay is duration * 200/HZ, and thus a
+ break can run from 1/100 sec to about 5/4 sec.
+ Need to check these values - RGH 141095.
+ */
+ base_addr[CyTDR] = 0; /* start break */
+ base_addr[CyTDR] = 0x81;
+ base_addr[CyTDR] = 0; /* delay a bit */
+ base_addr[CyTDR] = 0x82;
+ base_addr[CyTDR] = info->x_break*200/HZ;
+ base_addr[CyTDR] = 0; /* terminate break */
+ base_addr[CyTDR] = 0x83;
+ char_count -= 7;
+ info->x_break = 0;
+ }
+
+ while (char_count > 0){
+ if (!info->xmit_cnt){
+ base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy);
+ break;
+ }
+ if (info->xmit_buf == 0){
+ base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy);
+ break;
+ }
+ if (info->tty->stopped || info->tty->hw_stopped){
+ base_addr[CyIER] &= ~(CyTxMpty|CyTxRdy);
+ break;
+ }
+ /* Because the Embedded Transmit Commands have been
+ enabled, we must check to see if the escape
+ character, NULL, is being sent. If it is, we
+ must ensure that there is room for it to be
+ doubled in the output stream. Therefore we
+ no longer advance the pointer when the character
+ is fetched, but rather wait until after the check
+ for a NULL output character. (This is necessary
+ because there may not be room for the two chars
+ needed to send a NULL.
+ */
+ outch = info->xmit_buf[info->xmit_tail];
+ if( outch ){
+ info->xmit_cnt--;
+ info->xmit_tail = (info->xmit_tail + 1)
+ & (PAGE_SIZE - 1);
+ base_addr[CyTDR] = outch;
+ char_count--;
+ }else{
+ if(char_count > 1){
+ info->xmit_cnt--;
+ info->xmit_tail = (info->xmit_tail + 1)
+ & (PAGE_SIZE - 1);
+ base_addr[CyTDR] = outch;
+ base_addr[CyTDR] = 0;
+ char_count--;
+ char_count--;
+ }else{
+ break;
+ }
+ }
+ }
+
+ if (info->xmit_cnt < WAKEUP_CHARS) {
+ cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
+ }
+ base_addr[CyTEOIR] = (char_count != saved_cnt) ? 0 : CyNOTRANS;
+} /* cy_tx_interrupt */
+
+static void
+cd2401_rx_interrupt(int irq, void *dev_id, struct pt_regs *fp)
+{
+ struct tty_struct *tty;
+ struct cyclades_port *info;
+ volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
+ int channel;
+ char data;
+ int char_count;
+ int save_cnt;
+
+ /* determine the channel and change to that context */
+ channel = (u_short ) (base_addr[CyLICR] >> 2);
+ info = &cy_port[channel];
+ info->last_active = jiffies;
+ save_cnt = char_count = base_addr[CyRFOC];
+
+#ifdef CONFIG_REMOTE_DEBUG
+ if (channel == DEBUG_PORT) {
+ while (char_count--) {
+ data = base_addr[CyRDR];
+ queueDebugChar(data);
+ }
+ }
+ else
+#endif
+ /* if there is nowhere to put the data, discard it */
+ if(info->tty == 0){
+ while(char_count--){
+ data = base_addr[CyRDR];
+ }
+ }else{ /* there is an open port for this data */
+ tty = info->tty;
+ /* load # characters available from the chip */
+
+#ifdef CYCLOM_ENABLE_MONITORING
+ ++info->mon.int_count;
+ info->mon.char_count += char_count;
+ if (char_count > info->mon.char_max)
+ info->mon.char_max = char_count;
+ info->mon.char_last = char_count;
+#endif
+ while(char_count--){
+ data = base_addr[CyRDR];
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE){
+ continue;
+ }
+ tty->flip.count++;
+ *tty->flip.flag_buf_ptr++ = TTY_NORMAL;
+ *tty->flip.char_buf_ptr++ = data;
+#ifdef CYCLOM_16Y_HACK
+ udelay(10L);
+#endif
+ }
+ queue_task(&tty->flip.tqueue, &tq_timer);
+ }
+ /* end of service */
+ base_addr[CyREOIR] = save_cnt ? 0 : CyNOTRANS;
+} /* cy_rx_interrupt */
+
+/*
+ * 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
+ * cy_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 cy_sched_event(), and they get done here.
+ *
+ * This is done through one level of indirection--the task queue.
+ * When a hardware interrupt service routine wants service by the
+ * driver's bottom half, it enqueues the appropriate tq_struct (one
+ * per port) to the tq_cyclades work queue and sets a request flag
+ * via mark_bh for processing that queue. When the time is right,
+ * do_cyclades_bh is called (because of the mark_bh) and it requests
+ * that the work queue be processed.
+ *
+ * Although this may seem unwieldy, it gives the system a way to
+ * pass an argument (in this case the pointer to the cyclades_port
+ * structure) to the bottom half of the driver. Previous kernels
+ * had to poll every port to see if that port needed servicing.
+ */
+static void
+do_cyclades_bh(void)
+{
+ run_task_queue(&tq_cyclades);
+} /* do_cyclades_bh */
+
+static void
+do_softint(void *private_)
+{
+ struct cyclades_port *info = (struct cyclades_port *) private_;
+ struct tty_struct *tty;
+
+ tty = info->tty;
+ if (!tty)
+ return;
+
+ if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
+ tty_hangup(info->tty);
+ wake_up_interruptible(&info->open_wait);
+ info->flags &= ~(ASYNC_NORMAL_ACTIVE|
+ ASYNC_CALLOUT_ACTIVE);
+ }
+ if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event)) {
+ wake_up_interruptible(&info->open_wait);
+ }
+ if (test_and_clear_bit(Cy_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);
+ }
+} /* do_softint */
+
+
+/* This is called whenever a port becomes active;
+ interrupts are enabled and DTR & RTS are turned on.
+ */
+static int
+startup(struct cyclades_port * info)
+{
+ unsigned long flags;
+ volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
+ int channel;
+
+ if (info->flags & ASYNC_INITIALIZED){
+ return 0;
+ }
+
+ if (!info->type){
+ if (info->tty){
+ set_bit(TTY_IO_ERROR, &info->tty->flags);
+ }
+ return 0;
+ }
+ if (!info->xmit_buf){
+ info->xmit_buf = (unsigned char *) get_free_page (GFP_KERNEL);
+ if (!info->xmit_buf){
+ return -ENOMEM;
+ }
+ }
+
+ config_setup(info);
+
+ channel = info->line;
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk("startup channel %d\n", channel);
+#endif
+
+ save_flags(flags); cli();
+ base_addr[CyCAR] = (u_char)channel;
+ write_cy_cmd(base_addr,CyENB_RCVR|CyENB_XMTR);
+
+ base_addr[CyCAR] = (u_char)channel; /* !!! Is this needed? */
+ base_addr[CyMSVR1] = CyRTS;
+/* CP('S');CP('1'); */
+ base_addr[CyMSVR2] = CyDTR;
+
+#ifdef SERIAL_DEBUG_DTR
+ printk("cyc: %d: raising DTR\n", __LINE__);
+ printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]);
+#endif
+
+ base_addr[CyIER] |= CyRxData;
+ info->flags |= ASYNC_INITIALIZED;
+
+ if (info->tty){
+ clear_bit(TTY_IO_ERROR, &info->tty->flags);
+ }
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+
+ restore_flags(flags);
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk(" done\n");
+#endif
+ return 0;
+} /* startup */
+
+void
+start_xmit( struct cyclades_port *info )
+{
+ unsigned long flags;
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ int channel;
+
+ channel = info->line;
+ save_flags(flags); cli();
+ base_addr[CyCAR] = channel;
+ base_addr[CyIER] |= CyTxMpty;
+ restore_flags(flags);
+} /* start_xmit */
+
+/*
+ * This routine shuts down a serial port; interrupts are disabled,
+ * and DTR is dropped if the hangup on close termio flag is on.
+ */
+static void
+shutdown(struct cyclades_port * info)
+{
+ unsigned long flags;
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ int channel;
+
+ if (!(info->flags & ASYNC_INITIALIZED)){
+/* CP('$'); */
+ return;
+ }
+
+ channel = info->line;
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk("shutdown channel %d\n", channel);
+#endif
+
+ /* !!! REALLY MUST WAIT FOR LAST CHARACTER TO BE
+ SENT BEFORE DROPPING THE LINE !!! (Perhaps
+ set some flag that is read when XMTY happens.)
+ Other choices are to delay some fixed interval
+ or schedule some later processing.
+ */
+ save_flags(flags); cli();
+ if (info->xmit_buf){
+ free_page((unsigned long) info->xmit_buf);
+ info->xmit_buf = 0;
+ }
+
+ base_addr[CyCAR] = (u_char)channel;
+ if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
+ base_addr[CyMSVR1] = 0;
+/* CP('C');CP('1'); */
+ base_addr[CyMSVR2] = 0;
+#ifdef SERIAL_DEBUG_DTR
+ printk("cyc: %d: dropping DTR\n", __LINE__);
+ printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]);
+#endif
+ }
+ write_cy_cmd(base_addr,CyDIS_RCVR);
+ /* it may be appropriate to clear _XMIT at
+ some later date (after testing)!!! */
+
+ if (info->tty){
+ set_bit(TTY_IO_ERROR, &info->tty->flags);
+ }
+ info->flags &= ~ASYNC_INITIALIZED;
+ restore_flags(flags);
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk(" done\n");
+#endif
+ return;
+} /* shutdown */
+
+/*
+ * This routine finds or computes the various line characteristics.
+ */
+static void
+config_setup(struct cyclades_port * info)
+{
+ unsigned long flags;
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ int channel;
+ unsigned cflag;
+ int i;
+ unsigned char ti, need_init_chan = 0;
+
+ if (!info->tty || !info->tty->termios){
+ return;
+ }
+ if (info->line == -1){
+ return;
+ }
+ cflag = info->tty->termios->c_cflag;
+
+ /* baud rate */
+ i = cflag & CBAUD;
+#ifdef CBAUDEX
+/* Starting with kernel 1.1.65, there is direct support for
+ higher baud rates. The following code supports those
+ changes. The conditional aspect allows this driver to be
+ used for earlier as well as later kernel versions. (The
+ mapping is slightly different from serial.c because there
+ is still the possibility of supporting 75 kbit/sec with
+ the Cyclades board.)
+ */
+ if (i & CBAUDEX) {
+ if (i == B57600)
+ i = 16;
+ else if(i == B115200)
+ i = 18;
+#ifdef B78600
+ else if(i == B78600)
+ i = 17;
+#endif
+ else
+ info->tty->termios->c_cflag &= ~CBAUDEX;
+ }
+#endif
+ if (i == 15) {
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+ i += 1;
+ if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+ i += 3;
+ }
+ /* Don't ever change the speed of the console port. It will
+ * run at the speed specified in bootinfo, or at 19.2K */
+ /* Actually, it should run at whatever speed 166Bug was using */
+ /* Note info->timeout isn't used at present */
+ if (info != serial_console_info) {
+ info->tbpr = baud_bpr[i]; /* Tx BPR */
+ info->tco = baud_co[i]; /* Tx CO */
+ info->rbpr = baud_bpr[i]; /* Rx BPR */
+ info->rco = baud_co[i] >> 5; /* Rx CO */
+ if (baud_table[i] == 134) {
+ info->timeout = (info->xmit_fifo_size*HZ*30/269) + 2;
+ /* get it right for 134.5 baud */
+ } else if (baud_table[i]) {
+ info->timeout = (info->xmit_fifo_size*HZ*15/baud_table[i]) + 2;
+ /* this needs to be propagated into the card info */
+ } else {
+ info->timeout = 0;
+ }
+ }
+ /* By tradition (is it a standard?) a baud rate of zero
+ implies the line should be/has been closed. A bit
+ later in this routine such a test is performed. */
+
+ /* byte size and parity */
+ info->cor7 = 0;
+ info->cor6 = 0;
+ info->cor5 = 0;
+ info->cor4 = (info->default_threshold
+ ? info->default_threshold
+ : baud_cor4[i]); /* receive threshold */
+ /* Following two lines added 101295, RGH. */
+ /* It is obviously wrong to access CyCORx, and not info->corx here,
+ * try and remember to fix it later! */
+ channel = info->line;
+ base_addr[CyCAR] = (u_char)channel;
+ if (C_CLOCAL(info->tty)) {
+ if (base_addr[CyIER] & CyMdmCh)
+ base_addr[CyIER] &= ~CyMdmCh; /* without modem intr */
+ /* ignore 1->0 modem transitions */
+ if (base_addr[CyCOR4] & (CyDSR|CyCTS|CyDCD))
+ base_addr[CyCOR4] &= ~(CyDSR|CyCTS|CyDCD);
+ /* ignore 0->1 modem transitions */
+ if (base_addr[CyCOR5] & (CyDSR|CyCTS|CyDCD))
+ base_addr[CyCOR5] &= ~(CyDSR|CyCTS|CyDCD);
+ } else {
+ if ((base_addr[CyIER] & CyMdmCh) != CyMdmCh)
+ base_addr[CyIER] |= CyMdmCh; /* with modem intr */
+ /* act on 1->0 modem transitions */
+ if ((base_addr[CyCOR4] & (CyDSR|CyCTS|CyDCD)) != (CyDSR|CyCTS|CyDCD))
+ base_addr[CyCOR4] |= CyDSR|CyCTS|CyDCD;
+ /* act on 0->1 modem transitions */
+ if ((base_addr[CyCOR5] & (CyDSR|CyCTS|CyDCD)) != (CyDSR|CyCTS|CyDCD))
+ base_addr[CyCOR5] |= CyDSR|CyCTS|CyDCD;
+ }
+ info->cor3 = (cflag & CSTOPB) ? Cy_2_STOP : Cy_1_STOP;
+ info->cor2 = CyETC;
+ switch(cflag & CSIZE){
+ case CS5:
+ info->cor1 = Cy_5_BITS;
+ break;
+ case CS6:
+ info->cor1 = Cy_6_BITS;
+ break;
+ case CS7:
+ info->cor1 = Cy_7_BITS;
+ break;
+ case CS8:
+ info->cor1 = Cy_8_BITS;
+ break;
+ }
+ if (cflag & PARENB){
+ if (cflag & PARODD){
+ info->cor1 |= CyPARITY_O;
+ }else{
+ info->cor1 |= CyPARITY_E;
+ }
+ }else{
+ info->cor1 |= CyPARITY_NONE;
+ }
+
+ /* CTS flow control flag */
+#if 0
+ /* Don't complcate matters for now! RGH 141095 */
+ if (cflag & CRTSCTS){
+ info->flags |= ASYNC_CTS_FLOW;
+ info->cor2 |= CyCtsAE;
+ }else{
+ info->flags &= ~ASYNC_CTS_FLOW;
+ info->cor2 &= ~CyCtsAE;
+ }
+#endif
+ if (cflag & CLOCAL)
+ info->flags &= ~ASYNC_CHECK_CD;
+ else
+ info->flags |= ASYNC_CHECK_CD;
+
+ /***********************************************
+ The hardware option, CyRtsAO, presents RTS when
+ the chip has characters to send. Since most modems
+ use RTS as reverse (inbound) flow control, this
+ option is not used. If inbound flow control is
+ necessary, DTR can be programmed to provide the
+ appropriate signals for use with a non-standard
+ cable. Contact Marcio Saito for details.
+ ***********************************************/
+
+ channel = info->line;
+
+ save_flags(flags); cli();
+ base_addr[CyCAR] = (u_char)channel;
+
+ /* CyCMR set once only in mvme167_init_serial() */
+ if (base_addr[CyLICR] != channel << 2)
+ base_addr[CyLICR] = channel << 2;
+ if (base_addr[CyLIVR] != 0x5c)
+ base_addr[CyLIVR] = 0x5c;
+
+ /* tx and rx baud rate */
+
+ if (base_addr[CyCOR1] != info->cor1)
+ need_init_chan = 1;
+ if (base_addr[CyTCOR] != info->tco)
+ base_addr[CyTCOR] = info->tco;
+ if (base_addr[CyTBPR] != info->tbpr)
+ base_addr[CyTBPR] = info->tbpr;
+ if (base_addr[CyRCOR] != info->rco)
+ base_addr[CyRCOR] = info->rco;
+ if (base_addr[CyRBPR] != info->rbpr)
+ base_addr[CyRBPR] = info->rbpr;
+
+ /* set line characteristics according configuration */
+
+ if (base_addr[CySCHR1] != START_CHAR(info->tty))
+ base_addr[CySCHR1] = START_CHAR(info->tty);
+ if (base_addr[CySCHR2] != STOP_CHAR(info->tty))
+ base_addr[CySCHR2] = STOP_CHAR(info->tty);
+ if (base_addr[CySCRL] != START_CHAR(info->tty))
+ base_addr[CySCRL] = START_CHAR(info->tty);
+ if (base_addr[CySCRH] != START_CHAR(info->tty))
+ base_addr[CySCRH] = START_CHAR(info->tty);
+ if (base_addr[CyCOR1] != info->cor1)
+ base_addr[CyCOR1] = info->cor1;
+ if (base_addr[CyCOR2] != info->cor2)
+ base_addr[CyCOR2] = info->cor2;
+ if (base_addr[CyCOR3] != info->cor3)
+ base_addr[CyCOR3] = info->cor3;
+ if (base_addr[CyCOR4] != info->cor4)
+ base_addr[CyCOR4] = info->cor4;
+ if (base_addr[CyCOR5] != info->cor5)
+ base_addr[CyCOR5] = info->cor5;
+ if (base_addr[CyCOR6] != info->cor6)
+ base_addr[CyCOR6] = info->cor6;
+ if (base_addr[CyCOR7] != info->cor7)
+ base_addr[CyCOR7] = info->cor7;
+
+ if (need_init_chan)
+ write_cy_cmd(base_addr,CyINIT_CHAN);
+
+ base_addr[CyCAR] = (u_char)channel; /* !!! Is this needed? */
+
+ /* 2ms default rx timeout */
+ ti = info->default_timeout ? info->default_timeout : 0x02;
+ if (base_addr[CyRTPRL] != ti)
+ base_addr[CyRTPRL] = ti;
+ if (base_addr[CyRTPRH] != 0)
+ base_addr[CyRTPRH] = 0;
+
+ /* Set up RTS here also ????? RGH 141095 */
+ if(i == 0){ /* baud rate is zero, turn off line */
+ if ((base_addr[CyMSVR2] & CyDTR) == CyDTR)
+ base_addr[CyMSVR2] = 0;
+#ifdef SERIAL_DEBUG_DTR
+ printk("cyc: %d: dropping DTR\n", __LINE__);
+ printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]);
+#endif
+ }else{
+ if ((base_addr[CyMSVR2] & CyDTR) != CyDTR)
+ base_addr[CyMSVR2] = CyDTR;
+#ifdef SERIAL_DEBUG_DTR
+ printk("cyc: %d: raising DTR\n", __LINE__);
+ printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]);
+#endif
+ }
+
+ if (info->tty){
+ clear_bit(TTY_IO_ERROR, &info->tty->flags);
+ }
+
+ restore_flags(flags);
+
+} /* config_setup */
+
+
+static void
+cy_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+ unsigned long flags;
+
+#ifdef SERIAL_DEBUG_IO
+ printk("cy_put_char ttyS%d(0x%02x)\n", info->line, ch);
+#endif
+
+ if (serial_paranoia_check(info, tty->device, "cy_put_char"))
+ return;
+
+ if (!tty || !info->xmit_buf)
+ return;
+
+ save_flags(flags); cli();
+ if (info->xmit_cnt >= PAGE_SIZE - 1) {
+ restore_flags(flags);
+ return;
+ }
+
+ info->xmit_buf[info->xmit_head++] = ch;
+ info->xmit_head &= PAGE_SIZE - 1;
+ info->xmit_cnt++;
+ restore_flags(flags);
+} /* cy_put_char */
+
+
+static void
+cy_flush_chars(struct tty_struct *tty)
+{
+ struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+ unsigned long flags;
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ int channel;
+
+#ifdef SERIAL_DEBUG_IO
+ printk("cy_flush_chars ttyS%d\n", info->line); /* */
+#endif
+
+ if (serial_paranoia_check(info, tty->device, "cy_flush_chars"))
+ return;
+
+ if (info->xmit_cnt <= 0 || tty->stopped
+ || tty->hw_stopped || !info->xmit_buf)
+ return;
+
+ channel = info->line;
+
+ save_flags(flags); cli();
+ base_addr[CyCAR] = channel;
+ base_addr[CyIER] |= CyTxMpty;
+ restore_flags(flags);
+} /* cy_flush_chars */
+
+
+/* This routine gets called when tty_write has put something into
+ the write_queue. If the port is not already transmitting stuff,
+ start it off by enabling interrupts. The interrupt service
+ routine will then ensure that the characters are sent. If the
+ port is already active, there is no need to kick it.
+ */
+static int
+cy_write(struct tty_struct * tty, int from_user,
+ const unsigned char *buf, int count)
+{
+ struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+ unsigned long flags;
+ int c, total = 0;
+
+#ifdef SERIAL_DEBUG_IO
+ printk("cy_write ttyS%d\n", info->line); /* */
+#endif
+
+ if (serial_paranoia_check(info, tty->device, "cy_write")){
+ return 0;
+ }
+
+ if (!tty || !info->xmit_buf || !tmp_buf){
+ return 0;
+ }
+
+ while (1) {
+ save_flags(flags); cli();
+ c = MIN(count, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
+ SERIAL_XMIT_SIZE - info->xmit_head));
+ if (c <= 0){
+ restore_flags(flags);
+ break;
+ }
+
+ 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 ) {
+ start_xmit(info);
+ }
+ return total;
+} /* cy_write */
+
+
+static int
+cy_write_room(struct tty_struct *tty)
+{
+ struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+ int ret;
+
+#ifdef SERIAL_DEBUG_IO
+ printk("cy_write_room ttyS%d\n", info->line); /* */
+#endif
+
+ if (serial_paranoia_check(info, tty->device, "cy_write_room"))
+ return 0;
+ ret = PAGE_SIZE - info->xmit_cnt - 1;
+ if (ret < 0)
+ ret = 0;
+ return ret;
+} /* cy_write_room */
+
+
+static int
+cy_chars_in_buffer(struct tty_struct *tty)
+{
+ struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+
+#ifdef SERIAL_DEBUG_IO
+ printk("cy_chars_in_buffer ttyS%d %d\n", info->line, info->xmit_cnt); /* */
+#endif
+
+ if (serial_paranoia_check(info, tty->device, "cy_chars_in_buffer"))
+ return 0;
+
+ return info->xmit_cnt;
+} /* cy_chars_in_buffer */
+
+
+static void
+cy_flush_buffer(struct tty_struct *tty)
+{
+ struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+ unsigned long flags;
+
+#ifdef SERIAL_DEBUG_IO
+ printk("cy_flush_buffer ttyS%d\n", info->line); /* */
+#endif
+
+ if (serial_paranoia_check(info, tty->device, "cy_flush_buffer"))
+ return;
+ save_flags(flags); cli();
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+ restore_flags(flags);
+ wake_up_interruptible(&tty->write_wait);
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP))
+ && tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup)(tty);
+} /* cy_flush_buffer */
+
+
+/* This routine is called by the upper-layer tty layer to signal
+ that incoming characters should be throttled or that the
+ throttle should be released.
+ */
+static void
+cy_throttle(struct tty_struct * tty)
+{
+ struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+ unsigned long flags;
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ int channel;
+
+#ifdef SERIAL_DEBUG_THROTTLE
+ char buf[64];
+
+ printk("throttle %s: %d....\n", _tty_name(tty, buf),
+ tty->ldisc.chars_in_buffer(tty));
+ printk("cy_throttle ttyS%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->device, "cy_nthrottle")){
+ return;
+ }
+
+ if (I_IXOFF(tty)) {
+ info->x_char = STOP_CHAR(tty);
+ /* Should use the "Send Special Character" feature!!! */
+ }
+
+ channel = info->line;
+
+ save_flags(flags); cli();
+ base_addr[CyCAR] = (u_char)channel;
+ base_addr[CyMSVR1] = 0;
+ restore_flags(flags);
+
+ return;
+} /* cy_throttle */
+
+
+static void
+cy_unthrottle(struct tty_struct * tty)
+{
+ struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+ unsigned long flags;
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ int channel;
+
+#ifdef SERIAL_DEBUG_THROTTLE
+ char buf[64];
+
+ printk("throttle %s: %d....\n", _tty_name(tty, buf),
+ tty->ldisc.chars_in_buffer(tty));
+ printk("cy_unthrottle ttyS%d\n", info->line);
+#endif
+
+ if (serial_paranoia_check(info, tty->device, "cy_nthrottle")){
+ return;
+ }
+
+ if (I_IXOFF(tty)) {
+ info->x_char = START_CHAR(tty);
+ /* Should use the "Send Special Character" feature!!! */
+ }
+
+ channel = info->line;
+
+ save_flags(flags); cli();
+ base_addr[CyCAR] = (u_char)channel;
+ base_addr[CyMSVR1] = CyRTS;
+ restore_flags(flags);
+
+ return;
+} /* cy_unthrottle */
+
+static int
+get_serial_info(struct cyclades_port * info,
+ struct serial_struct * retinfo)
+{
+ struct serial_struct tmp;
+
+/* CP('g'); */
+ if (!retinfo)
+ return -EFAULT;
+ memset(&tmp, 0, sizeof(tmp));
+ tmp.type = info->type;
+ tmp.line = info->line;
+ tmp.port = info->line;
+ tmp.irq = 0;
+ tmp.flags = info->flags;
+ tmp.baud_base = 0; /*!!!*/
+ tmp.close_delay = info->close_delay;
+ tmp.custom_divisor = 0; /*!!!*/
+ tmp.hub6 = 0; /*!!!*/
+ copy_to_user(retinfo,&tmp,sizeof(*retinfo));
+ return 0;
+} /* get_serial_info */
+
+static int
+set_serial_info(struct cyclades_port * info,
+ struct serial_struct * new_info)
+{
+ struct serial_struct new_serial;
+ struct cyclades_port old_info;
+
+/* CP('s'); */
+ if (!new_info)
+ return -EFAULT;
+ copy_from_user(&new_serial,new_info,sizeof(new_serial));
+ old_info = *info;
+
+ if (!suser()) {
+ if ((new_serial.close_delay != info->close_delay) ||
+ ((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) !=
+ (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)))
+ return -EPERM;
+ info->flags = ((info->flags & ~ASYNC_USR_MASK) |
+ (new_serial.flags & ASYNC_USR_MASK));
+ goto check_and_exit;
+ }
+
+
+ /*
+ * OK, past this point, all the error checking has been done.
+ * At this point, we start making changes.....
+ */
+
+ info->flags = ((info->flags & ~ASYNC_FLAGS) |
+ (new_serial.flags & ASYNC_FLAGS));
+ info->close_delay = new_serial.close_delay;
+
+
+check_and_exit:
+ if (info->flags & ASYNC_INITIALIZED){
+ config_setup(info);
+ return 0;
+ }else{
+ return startup(info);
+ }
+} /* set_serial_info */
+
+static int
+get_modem_info(struct cyclades_port * info, unsigned int *value)
+{
+ int channel;
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ unsigned long flags;
+ unsigned char status;
+ unsigned int result;
+
+ channel = info->line;
+
+ save_flags(flags); cli();
+ base_addr[CyCAR] = (u_char)channel;
+ status = base_addr[CyMSVR1] | base_addr[CyMSVR2];
+ restore_flags(flags);
+
+ result = ((status & CyRTS) ? TIOCM_RTS : 0)
+ | ((status & CyDTR) ? TIOCM_DTR : 0)
+ | ((status & CyDCD) ? TIOCM_CAR : 0)
+ | ((status & CyDSR) ? TIOCM_DSR : 0)
+ | ((status & CyCTS) ? TIOCM_CTS : 0);
+ cy_put_user(result,(unsigned long *) value);
+ return 0;
+} /* get_modem_info */
+
+static int
+set_modem_info(struct cyclades_port * info, unsigned int cmd,
+ unsigned int *value)
+{
+ int channel;
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ unsigned long flags;
+ unsigned int arg = cy_get_user((unsigned long *) value);
+
+ channel = info->line;
+
+ switch (cmd) {
+ case TIOCMBIS:
+ if (arg & TIOCM_RTS){
+ save_flags(flags); cli();
+ base_addr[CyCAR] = (u_char)channel;
+ base_addr[CyMSVR1] = CyRTS;
+ restore_flags(flags);
+ }
+ if (arg & TIOCM_DTR){
+ save_flags(flags); cli();
+ base_addr[CyCAR] = (u_char)channel;
+/* CP('S');CP('2'); */
+ base_addr[CyMSVR2] = CyDTR;
+#ifdef SERIAL_DEBUG_DTR
+ printk("cyc: %d: raising DTR\n", __LINE__);
+ printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]);
+#endif
+ restore_flags(flags);
+ }
+ break;
+ case TIOCMBIC:
+ if (arg & TIOCM_RTS){
+ save_flags(flags); cli();
+ base_addr[CyCAR] = (u_char)channel;
+ base_addr[CyMSVR1] = 0;
+ restore_flags(flags);
+ }
+ if (arg & TIOCM_DTR){
+ save_flags(flags); cli();
+ base_addr[CyCAR] = (u_char)channel;
+/* CP('C');CP('2'); */
+ base_addr[CyMSVR2] = 0;
+#ifdef SERIAL_DEBUG_DTR
+ printk("cyc: %d: dropping DTR\n", __LINE__);
+ printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]);
+#endif
+ restore_flags(flags);
+ }
+ break;
+ case TIOCMSET:
+ if (arg & TIOCM_RTS){
+ save_flags(flags); cli();
+ base_addr[CyCAR] = (u_char)channel;
+ base_addr[CyMSVR1] = CyRTS;
+ restore_flags(flags);
+ }else{
+ save_flags(flags); cli();
+ base_addr[CyCAR] = (u_char)channel;
+ base_addr[CyMSVR1] = 0;
+ restore_flags(flags);
+ }
+ if (arg & TIOCM_DTR){
+ save_flags(flags); cli();
+ base_addr[CyCAR] = (u_char)channel;
+/* CP('S');CP('3'); */
+ base_addr[CyMSVR2] = CyDTR;
+#ifdef SERIAL_DEBUG_DTR
+ printk("cyc: %d: raising DTR\n", __LINE__);
+ printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]);
+#endif
+ restore_flags(flags);
+ }else{
+ save_flags(flags); cli();
+ base_addr[CyCAR] = (u_char)channel;
+/* CP('C');CP('3'); */
+ base_addr[CyMSVR2] = 0;
+#ifdef SERIAL_DEBUG_DTR
+ printk("cyc: %d: dropping DTR\n", __LINE__);
+ printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]);
+#endif
+ restore_flags(flags);
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+} /* set_modem_info */
+
+static void
+send_break( struct cyclades_port * info, int duration)
+{ /* Let the transmit ISR take care of this (since it
+ requires stuffing characters into the output stream).
+ */
+ info->x_break = duration;
+ if (!info->xmit_cnt ) {
+ start_xmit(info);
+ }
+} /* send_break */
+
+static int
+get_mon_info(struct cyclades_port * info, struct cyclades_monitor * mon)
+{
+
+ copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor));
+ info->mon.int_count = 0;
+ info->mon.char_count = 0;
+ info->mon.char_max = 0;
+ info->mon.char_last = 0;
+ return 0;
+}
+
+static int
+set_threshold(struct cyclades_port * info, unsigned long value)
+{
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ int channel;
+
+ channel = info->line;
+
+ info->cor4 &= ~CyREC_FIFO;
+ info->cor4 |= value & CyREC_FIFO;
+ base_addr[CyCOR4] = info->cor4;
+ return 0;
+}
+
+static int
+get_threshold(struct cyclades_port * info, unsigned long *value)
+{
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ int channel;
+ unsigned long tmp;
+
+ channel = info->line;
+
+ tmp = base_addr[CyCOR4] & CyREC_FIFO;
+ cy_put_user(tmp,value);
+ return 0;
+}
+
+static int
+set_default_threshold(struct cyclades_port * info, unsigned long value)
+{
+ info->default_threshold = value & 0x0f;
+ return 0;
+}
+
+static int
+get_default_threshold(struct cyclades_port * info, unsigned long *value)
+{
+ cy_put_user(info->default_threshold,value);
+ return 0;
+}
+
+static int
+set_timeout(struct cyclades_port * info, unsigned long value)
+{
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ int channel;
+
+ channel = info->line;
+
+ base_addr[CyRTPRL] = value & 0xff;
+ base_addr[CyRTPRH] = (value >> 8) & 0xff;
+ return 0;
+}
+
+static int
+get_timeout(struct cyclades_port * info, unsigned long *value)
+{
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ int channel;
+ unsigned long tmp;
+
+ channel = info->line;
+
+ tmp = base_addr[CyRTPRL];
+ cy_put_user(tmp,value);
+ return 0;
+}
+
+static int
+set_default_timeout(struct cyclades_port * info, unsigned long value)
+{
+ info->default_timeout = value & 0xff;
+ return 0;
+}
+
+static int
+get_default_timeout(struct cyclades_port * info, unsigned long *value)
+{
+ cy_put_user(info->default_timeout,value);
+ return 0;
+}
+
+static int
+cy_ioctl(struct tty_struct *tty, struct file * file,
+ unsigned int cmd, unsigned long arg)
+{
+ int error;
+ struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
+ int ret_val = 0;
+
+#ifdef SERIAL_DEBUG_OTHER
+ printk("cy_ioctl ttyS%d, cmd = %x arg = %lx\n", info->line, cmd, arg); /* */
+#endif
+
+ switch (cmd) {
+ case CYGETMON:
+ error = verify_area(VERIFY_WRITE, (void *) arg
+ ,sizeof(struct cyclades_monitor));
+ if (error){
+ ret_val = error;
+ break;
+ }
+ ret_val = get_mon_info(info, (struct cyclades_monitor *)arg);
+ break;
+ case CYGETTHRESH:
+ error = verify_area(VERIFY_WRITE, (void *) arg
+ ,sizeof(unsigned long));
+ if (error){
+ ret_val = error;
+ break;
+ }
+ ret_val = get_threshold(info, (unsigned long *)arg);
+ break;
+ case CYSETTHRESH:
+ ret_val = set_threshold(info, (unsigned long)arg);
+ break;
+ case CYGETDEFTHRESH:
+ error = verify_area(VERIFY_WRITE, (void *) arg
+ ,sizeof(unsigned long));
+ if (error){
+ ret_val = error;
+ break;
+ }
+ ret_val = get_default_threshold(info, (unsigned long *)arg);
+ break;
+ case CYSETDEFTHRESH:
+ ret_val = set_default_threshold(info, (unsigned long)arg);
+ break;
+ case CYGETTIMEOUT:
+ error = verify_area(VERIFY_WRITE, (void *) arg
+ ,sizeof(unsigned long));
+ if (error){
+ ret_val = error;
+ break;
+ }
+ ret_val = get_timeout(info, (unsigned long *)arg);
+ break;
+ case CYSETTIMEOUT:
+ ret_val = set_timeout(info, (unsigned long)arg);
+ break;
+ case CYGETDEFTIMEOUT:
+ error = verify_area(VERIFY_WRITE, (void *) arg
+ ,sizeof(unsigned long));
+ if (error){
+ ret_val = error;
+ break;
+ }
+ ret_val = get_default_timeout(info, (unsigned long *)arg);
+ break;
+ case CYSETDEFTIMEOUT:
+ ret_val = set_default_timeout(info, (unsigned long)arg);
+ break;
+ case TCSBRK: /* SVID version: non-zero arg --> no break */
+ ret_val = tty_check_change(tty);
+ if (ret_val)
+ return ret_val;
+ tty_wait_until_sent(tty,0);
+ if (!arg)
+ send_break(info, HZ/4); /* 1/4 second */
+ break;
+ case TCSBRKP: /* support for POSIX tcsendbreak() */
+ ret_val = tty_check_change(tty);
+ if (ret_val)
+ return ret_val;
+ tty_wait_until_sent(tty,0);
+ send_break(info, arg ? arg*(HZ/10) : HZ/4);
+ break;
+ case TIOCMBIS:
+ case TIOCMBIC:
+ case TIOCMSET:
+ ret_val = set_modem_info(info, cmd, (unsigned int *) arg);
+ break;
+
+/* The following commands are incompletely implemented!!! */
+ case TIOCGSOFTCAR:
+ error = verify_area(VERIFY_WRITE, (void *) arg
+ ,sizeof(unsigned int *));
+ if (error){
+ ret_val = error;
+ break;
+ }
+ cy_put_user(C_CLOCAL(tty) ? 1 : 0,
+ (unsigned long *) arg);
+ break;
+ case TIOCSSOFTCAR:
+ error = verify_area(VERIFY_READ, (void *) arg
+ ,sizeof(unsigned long *));
+ if (error){
+ ret_val = error;
+ break;
+ }
+
+ arg = cy_get_user((unsigned long *) arg);
+ tty->termios->c_cflag =
+ ((tty->termios->c_cflag & ~CLOCAL) |
+ (arg ? CLOCAL : 0));
+ break;
+ case TIOCMGET:
+ error = verify_area(VERIFY_WRITE, (void *) arg
+ ,sizeof(unsigned int *));
+ if (error){
+ ret_val = error;
+ break;
+ }
+ ret_val = get_modem_info(info, (unsigned int *) arg);
+ break;
+ case TIOCGSERIAL:
+ error = verify_area(VERIFY_WRITE, (void *) arg
+ ,sizeof(struct serial_struct));
+ if (error){
+ ret_val = error;
+ break;
+ }
+ ret_val = get_serial_info(info,
+ (struct serial_struct *) arg);
+ break;
+ case TIOCSSERIAL:
+ ret_val = set_serial_info(info,
+ (struct serial_struct *) arg);
+ break;
+ default:
+ ret_val = -ENOIOCTLCMD;
+ }
+
+#ifdef SERIAL_DEBUG_OTHER
+ printk("cy_ioctl done\n");
+#endif
+
+ return ret_val;
+} /* cy_ioctl */
+
+
+
+
+static void
+cy_set_termios(struct tty_struct *tty, struct termios * old_termios)
+{
+ struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
+
+#ifdef SERIAL_DEBUG_OTHER
+ printk("cy_set_termios ttyS%d\n", info->line);
+#endif
+
+ if (tty->termios->c_cflag == old_termios->c_cflag)
+ return;
+ config_setup(info);
+
+ if ((old_termios->c_cflag & CRTSCTS) &&
+ !(tty->termios->c_cflag & CRTSCTS)) {
+ tty->stopped = 0;
+ cy_start(tty);
+ }
+#ifdef tytso_patch_94Nov25_1726
+ if (!(old_termios->c_cflag & CLOCAL) &&
+ (tty->termios->c_cflag & CLOCAL))
+ wake_up_interruptible(&info->open_wait);
+#endif
+
+ return;
+} /* cy_set_termios */
+
+
+static void
+cy_close(struct tty_struct * tty, struct file * filp)
+{
+ struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
+
+/* CP('C'); */
+#ifdef SERIAL_DEBUG_OTHER
+ printk("cy_close ttyS%d\n", info->line);
+#endif
+
+ if (!info
+ || serial_paranoia_check(info, tty->device, "cy_close")){
+ return;
+ }
+#ifdef SERIAL_DEBUG_OPEN
+ printk("cy_close ttyS%d, count = %d\n", info->line, info->count);
+#endif
+
+ if ((tty->count == 1) && (info->count != 1)) {
+ /*
+ * Uh, oh. tty->count is 1, which means that the tty
+ * structure will be freed. Info->count should always
+ * be one in these conditions. If it's greater than
+ * one, we've got real problems, since it means the
+ * serial port won't be shutdown.
+ */
+ printk("cy_close: bad serial port count; tty->count is 1, "
+ "info->count is %d\n", info->count);
+ info->count = 1;
+ }
+#ifdef SERIAL_DEBUG_COUNT
+ printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count - 1);
+#endif
+ if (--info->count < 0) {
+ printk("cy_close: bad serial port count for ttys%d: %d\n",
+ info->line, info->count);
+#ifdef SERIAL_DEBUG_COUNT
+ printk("cyc: %d: setting count to 0\n", __LINE__);
+#endif
+ info->count = 0;
+ }
+ if (info->count)
+ return;
+ info->flags |= ASYNC_CLOSING;
+ /*
+ * Save the termios structure, since this port may have
+ * separate termios for callout and dialin.
+ */
+ if (info->flags & ASYNC_NORMAL_ACTIVE)
+ info->normal_termios = *tty->termios;
+ if (info->flags & ASYNC_CALLOUT_ACTIVE)
+ info->callout_termios = *tty->termios;
+ if (info->flags & ASYNC_INITIALIZED)
+ tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
+ shutdown(info);
+ if (tty->driver.flush_buffer)
+ tty->driver.flush_buffer(tty);
+ if (tty->ldisc.flush_buffer)
+ tty->ldisc.flush_buffer(tty);
+ 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 &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE|
+ ASYNC_CLOSING);
+ wake_up_interruptible(&info->close_wait);
+
+#ifdef SERIAL_DEBUG_OTHER
+ printk("cy_close done\n");
+#endif
+
+ return;
+} /* cy_close */
+
+/*
+ * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
+ */
+void
+cy_hangup(struct tty_struct *tty)
+{
+ struct cyclades_port * info = (struct cyclades_port *)tty->driver_data;
+
+#ifdef SERIAL_DEBUG_OTHER
+ printk("cy_hangup ttyS%d\n", info->line); /* */
+#endif
+
+ if (serial_paranoia_check(info, tty->device, "cy_hangup"))
+ return;
+
+ shutdown(info);
+#if 0
+ info->event = 0;
+ info->count = 0;
+#ifdef SERIAL_DEBUG_COUNT
+ printk("cyc: %d: setting count to 0\n", __LINE__);
+#endif
+ info->tty = 0;
+#endif
+ info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE);
+ wake_up_interruptible(&info->open_wait);
+} /* cy_hangup */
+
+
+
+/*
+ * ------------------------------------------------------------
+ * cy_open() and friends
+ * ------------------------------------------------------------
+ */
+
+static int
+block_til_ready(struct tty_struct *tty, struct file * filp,
+ struct cyclades_port *info)
+{
+ struct wait_queue wait = { current, NULL };
+ unsigned long flags;
+ int channel;
+ int retval;
+ volatile u_char *base_addr = (u_char *)BASE_ADDR;
+
+ /*
+ * If the device is in the middle of being closed, then block
+ * until it's done, and then try again.
+ */
+ if (info->flags & ASYNC_CLOSING) {
+ interruptible_sleep_on(&info->close_wait);
+ if (info->flags & ASYNC_HUP_NOTIFY){
+ return -EAGAIN;
+ }else{
+ return -ERESTARTSYS;
+ }
+ }
+
+ /*
+ * If this is a callout device, then just make sure the normal
+ * device isn't being used.
+ */
+ if (tty->driver.subtype == SERIAL_TYPE_CALLOUT) {
+ if (info->flags & ASYNC_NORMAL_ACTIVE){
+ return -EBUSY;
+ }
+ if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
+ (info->flags & ASYNC_SESSION_LOCKOUT) &&
+ (info->session != current->session)){
+ return -EBUSY;
+ }
+ if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
+ (info->flags & ASYNC_PGRP_LOCKOUT) &&
+ (info->pgrp != current->pgrp)){
+ return -EBUSY;
+ }
+ info->flags |= ASYNC_CALLOUT_ACTIVE;
+ return 0;
+ }
+
+ /*
+ * If non-blocking mode is set, then make the check up front
+ * and then exit.
+ */
+ if (filp->f_flags & O_NONBLOCK) {
+ if (info->flags & ASYNC_CALLOUT_ACTIVE){
+ return -EBUSY;
+ }
+ info->flags |= ASYNC_NORMAL_ACTIVE;
+ return 0;
+ }
+
+ /*
+ * 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
+ * cy_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
+ info->count--;
+#ifdef SERIAL_DEBUG_COUNT
+ printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count);
+#endif
+ info->blocked_open++;
+
+ channel = info->line;
+
+ while (1) {
+ save_flags(flags); cli();
+ if (!(info->flags & ASYNC_CALLOUT_ACTIVE)){
+ base_addr[CyCAR] = (u_char)channel;
+ base_addr[CyMSVR1] = CyRTS;
+/* CP('S');CP('4'); */
+ base_addr[CyMSVR2] = CyDTR;
+#ifdef SERIAL_DEBUG_DTR
+ printk("cyc: %d: raising DTR\n", __LINE__);
+ printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1], base_addr[CyMSVR2]);
+#endif
+ }
+ restore_flags(flags);
+ current->state = TASK_INTERRUPTIBLE;
+ if (tty_hung_up_p(filp)
+ || !(info->flags & ASYNC_INITIALIZED) ){
+ if (info->flags & ASYNC_HUP_NOTIFY) {
+ retval = -EAGAIN;
+ }else{
+ retval = -ERESTARTSYS;
+ }
+ break;
+ }
+ save_flags(flags); cli();
+ base_addr[CyCAR] = (u_char)channel;
+/* CP('L');CP1(1 && C_CLOCAL(tty)); CP1(1 && (base_addr[CyMSVR1] & CyDCD) ); */
+ if (!(info->flags & ASYNC_CALLOUT_ACTIVE)
+ && !(info->flags & ASYNC_CLOSING)
+ && (C_CLOCAL(tty)
+ || (base_addr[CyMSVR1] & CyDCD))) {
+ restore_flags(flags);
+ break;
+ }
+ restore_flags(flags);
+ if (signal_pending(current)) {
+ retval = -ERESTARTSYS;
+ break;
+ }
+#ifdef SERIAL_DEBUG_OPEN
+ printk("block_til_ready blocking: ttyS%d, count = %d\n",
+ info->line, info->count);/**/
+#endif
+ schedule();
+ }
+ current->state = TASK_RUNNING;
+ remove_wait_queue(&info->open_wait, &wait);
+ if (!tty_hung_up_p(filp)){
+ info->count++;
+#ifdef SERIAL_DEBUG_COUNT
+ printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count);
+#endif
+ }
+ info->blocked_open--;
+#ifdef SERIAL_DEBUG_OPEN
+ printk("block_til_ready after blocking: ttyS%d, count = %d\n",
+ info->line, info->count);/**/
+#endif
+ if (retval)
+ return retval;
+ info->flags |= ASYNC_NORMAL_ACTIVE;
+ return 0;
+} /* block_til_ready */
+
+/*
+ * This routine is called whenever a serial port is opened. It
+ * performs the serial-specific initialization for the tty structure.
+ */
+int
+cy_open(struct tty_struct *tty, struct file * filp)
+{
+ struct cyclades_port *info;
+ int retval, line;
+
+/* CP('O'); */
+ line = MINOR(tty->device) - tty->driver.minor_start;
+ if ((line < 0) || (NR_PORTS <= line)){
+ return -ENODEV;
+ }
+ info = &cy_port[line];
+ if (info->line < 0){
+ return -ENODEV;
+ }
+#ifdef SERIAL_DEBUG_OTHER
+ printk("cy_open ttyS%d\n", info->line); /* */
+#endif
+ if (serial_paranoia_check(info, tty->device, "cy_open")){
+ return -ENODEV;
+ }
+#ifdef SERIAL_DEBUG_OPEN
+ printk("cy_open ttyS%d, count = %d\n", info->line, info->count);/**/
+#endif
+ info->count++;
+#ifdef SERIAL_DEBUG_COUNT
+ printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count);
+#endif
+ tty->driver_data = info;
+ info->tty = tty;
+
+ if (!tmp_buf) {
+ tmp_buf = (unsigned char *) get_free_page(GFP_KERNEL);
+ if (!tmp_buf){
+ return -ENOMEM;
+ }
+ }
+
+ if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
+ if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
+ *tty->termios = info->normal_termios;
+ else
+ *tty->termios = info->callout_termios;
+ }
+ /*
+ * 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("cy_open returning after block_til_ready with %d\n",
+ retval);
+#endif
+ return retval;
+ }
+
+ info->session = current->session;
+ info->pgrp = current->pgrp;
+
+#ifdef SERIAL_DEBUG_OPEN
+ printk("cy_open done\n");/**/
+#endif
+ return 0;
+} /* cy_open */
+
+
+
+/*
+ * ---------------------------------------------------------------------
+ * serial167_init() and friends
+ *
+ * serial167_init() is called at boot-time to initialize the serial driver.
+ * ---------------------------------------------------------------------
+ */
+
+/*
+ * This routine prints out the appropriate serial driver version
+ * number, and identifies which options were configured into this
+ * driver.
+ */
+static void
+show_version(void)
+{
+ printk("MVME166/167 cd2401 driver\n");
+} /* show_version */
+
+/* initialize chips on card -- return number of valid
+ chips (which is number of ports/4) */
+
+/*
+ * This initialises the hardware to a reasonable state. It should
+ * probe the chip first so as to copy 166-Bug setup as a default for
+ * port 0. It initialises CMR to CyASYNC; that is never done again, so
+ * as to limit the number of CyINIT_CHAN commands in normal running.
+ *
+ * ... I wonder what I should do if this fails ...
+ */
+
+void
+mvme167_serial_console_setup(int cflag)
+{
+ volatile unsigned char* base_addr = (u_char *)BASE_ADDR;
+ int ch;
+ u_char spd;
+ u_char rcor, rbpr, badspeed = 0;
+ unsigned long flags;
+
+ save_flags(flags); cli();
+
+ /*
+ * First probe channel zero of the chip, to see what speed has
+ * been selected.
+ */
+
+ base_addr[CyCAR] = 0;
+
+ rcor = base_addr[CyRCOR] << 5;
+ rbpr = base_addr[CyRBPR];
+
+ for (spd = 0; spd < sizeof(baud_bpr); spd++)
+ if (rbpr == baud_bpr[spd] && rcor == baud_co[spd])
+ break;
+ if (spd >= sizeof(baud_bpr)) {
+ spd = 14; /* 19200 */
+ badspeed = 1; /* Failed to identify speed */
+ }
+ initial_console_speed = spd;
+
+ /* OK, we have chosen a speed, now reset and reinitialise */
+
+ my_udelay(20000L); /* Allow time for any active o/p to complete */
+ if(base_addr[CyCCR] != 0x00){
+ /* printk(" chip is never idle (CCR != 0)\n"); */
+ return;
+ }
+
+ base_addr[CyCCR] = CyCHIP_RESET; /* Reset the chip */
+ my_udelay(1000L);
+
+ if(base_addr[CyGFRCR] == 0x00){
+ /* printk(" chip is not responding (GFRCR stayed 0)\n"); */
+ return;
+ }
+
+ /*
+ * System clock is 20Mhz, divided by 2048, so divide by 10 for a 1.0ms
+ * tick
+ */
+
+ base_addr[CyTPR] = 10;
+
+ base_addr[CyPILR1] = 0x01; /* Interrupt level for modem change */
+ base_addr[CyPILR2] = 0x02; /* Interrupt level for tx ints */
+ base_addr[CyPILR3] = 0x03; /* Interrupt level for rx ints */
+
+ /*
+ * Attempt to set up all channels to something reasonable, and
+ * bang out a INIT_CHAN command. We should then be able to limit
+ * the ammount of fiddling we have to do in normal running.
+ */
+
+ for (ch = 3; ch >= 0 ; ch--) {
+ base_addr[CyCAR] = (u_char)ch;
+ base_addr[CyIER] = 0;
+ base_addr[CyCMR] = CyASYNC;
+ base_addr[CyLICR] = (u_char)ch << 2;
+ base_addr[CyLIVR] = 0x5c;
+ base_addr[CyTCOR] = baud_co[spd];
+ base_addr[CyTBPR] = baud_bpr[spd];
+ base_addr[CyRCOR] = baud_co[spd] >> 5;
+ base_addr[CyRBPR] = baud_bpr[spd];
+ base_addr[CySCHR1] = 'Q' & 0x1f;
+ base_addr[CySCHR2] = 'X' & 0x1f;
+ base_addr[CySCRL] = 0;
+ base_addr[CySCRH] = 0;
+ base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE;
+ base_addr[CyCOR2] = 0;
+ base_addr[CyCOR3] = Cy_1_STOP;
+ base_addr[CyCOR4] = baud_cor4[spd];
+ base_addr[CyCOR5] = 0;
+ base_addr[CyCOR6] = 0;
+ base_addr[CyCOR7] = 0;
+ base_addr[CyRTPRL] = 2;
+ base_addr[CyRTPRH] = 0;
+ base_addr[CyMSVR1] = 0;
+ base_addr[CyMSVR2] = 0;
+ write_cy_cmd(base_addr,CyINIT_CHAN|CyDIS_RCVR|CyDIS_XMTR);
+ }
+
+ /*
+ * Now do specials for channel zero....
+ */
+
+ base_addr[CyMSVR1] = CyRTS;
+ base_addr[CyMSVR2] = CyDTR;
+ base_addr[CyIER] = CyRxData;
+ write_cy_cmd(base_addr,CyENB_RCVR|CyENB_XMTR);
+
+ restore_flags(flags);
+
+ my_udelay(20000L); /* Let it all settle down */
+
+ printk("CD2401 initialised, chip is rev 0x%02x\n", base_addr[CyGFRCR]);
+ if (badspeed)
+ printk(" WARNING: Failed to identify line speed, rcor=%02x,rbpr=%02x\n",
+ rcor >> 5, rbpr);
+} /* serial_console_init */
+
+/* The serial driver boot-time initialization code!
+ Hardware I/O ports are mapped to character special devices on a
+ first found, first allocated manner. That is, this code searches
+ for Cyclom cards in the system. As each is found, it is probed
+ to discover how many chips (and thus how many ports) are present.
+ These ports are mapped to the tty ports 64 and upward in monotonic
+ fashion. If an 8-port card is replaced with a 16-port card, the
+ port mapping on a following card will shift.
+
+ This approach is different from what is used in the other serial
+ device driver because the Cyclom is more properly a multiplexer,
+ not just an aggregation of serial ports on one card.
+
+ If there are more cards with more ports than have been statically
+ allocated above, a warning is printed and the extra ports are ignored.
+ */
+int
+serial167_init(void)
+{
+ struct cyclades_port *info;
+ int good_ports = 0;
+ int port_num = 0;
+ int index;
+ int DefSpeed;
+#ifdef notyet
+ struct sigaction sa;
+#endif
+
+ if (!(mvme16x_config &MVME16x_CONFIG_GOT_CD2401))
+ return 0;
+
+#if 0
+scrn[1] = '\0';
+#endif
+
+ show_version();
+
+ /* Has "console=0,9600n8" been used in bootinfo to change speed? */
+ if (serial_console_cflag)
+ DefSpeed = serial_console_cflag & 0017;
+ else {
+ DefSpeed = initial_console_speed;
+ serial_console_info = &cy_port[0];
+ serial_console_cflag = DefSpeed | CS8;
+#if 0
+ serial_console = 64; /*callout_driver.minor_start*/
+#endif
+ }
+
+ /* Initialize the tty_driver structure */
+
+ memset(&cy_serial_driver, 0, sizeof(struct tty_driver));
+ cy_serial_driver.magic = TTY_DRIVER_MAGIC;
+ cy_serial_driver.name = "ttyS";
+ cy_serial_driver.major = TTY_MAJOR;
+ cy_serial_driver.minor_start = 64;
+ cy_serial_driver.num = NR_PORTS;
+ cy_serial_driver.type = TTY_DRIVER_TYPE_SERIAL;
+ cy_serial_driver.subtype = SERIAL_TYPE_NORMAL;
+ cy_serial_driver.init_termios = tty_std_termios;
+ cy_serial_driver.init_termios.c_cflag =
+ B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ cy_serial_driver.flags = TTY_DRIVER_REAL_RAW;
+ cy_serial_driver.refcount = &serial_refcount;
+ cy_serial_driver.table = serial_table;
+ cy_serial_driver.termios = serial_termios;
+ cy_serial_driver.termios_locked = serial_termios_locked;
+ cy_serial_driver.open = cy_open;
+ cy_serial_driver.close = cy_close;
+ cy_serial_driver.write = cy_write;
+ cy_serial_driver.put_char = cy_put_char;
+ cy_serial_driver.flush_chars = cy_flush_chars;
+ cy_serial_driver.write_room = cy_write_room;
+ cy_serial_driver.chars_in_buffer = cy_chars_in_buffer;
+ cy_serial_driver.flush_buffer = cy_flush_buffer;
+ cy_serial_driver.ioctl = cy_ioctl;
+ cy_serial_driver.throttle = cy_throttle;
+ cy_serial_driver.unthrottle = cy_unthrottle;
+ cy_serial_driver.set_termios = cy_set_termios;
+ cy_serial_driver.stop = cy_stop;
+ cy_serial_driver.start = cy_start;
+ cy_serial_driver.hangup = cy_hangup;
+
+ /*
+ * The callout device is just like normal device except for
+ * major number and the subtype code.
+ */
+ cy_callout_driver = cy_serial_driver;
+ cy_callout_driver.name = "cua";
+ cy_callout_driver.major = TTYAUX_MAJOR;
+ cy_callout_driver.subtype = SERIAL_TYPE_CALLOUT;
+
+ if (tty_register_driver(&cy_serial_driver))
+ panic("Couldn't register Cyclom serial driver\n");
+ if (tty_register_driver(&cy_callout_driver))
+ panic("Couldn't register Cyclom callout driver\n");
+
+ init_bh(CYCLADES_BH, do_cyclades_bh);
+
+ port_num = 0;
+ info = cy_port;
+ for (index = 0; index < 1; index++) {
+
+ good_ports = 4;
+
+ if(port_num < NR_PORTS){
+ while( good_ports-- && port_num < NR_PORTS){
+ /*** initialize port ***/
+ info->magic = CYCLADES_MAGIC;
+ info->type = PORT_CIRRUS;
+ info->card = index;
+ info->line = port_num;
+ info->flags = STD_COM_FLAGS;
+ info->tty = 0;
+ info->xmit_fifo_size = 12;
+ info->cor1 = CyPARITY_NONE|Cy_8_BITS;
+ info->cor2 = CyETC;
+ info->cor3 = Cy_1_STOP;
+ info->cor4 = 0x08; /* _very_ small receive threshold */
+ info->cor5 = 0;
+ info->cor6 = 0;
+ info->cor7 = 0;
+ info->tbpr = baud_bpr[DefSpeed]; /* Tx BPR */
+ info->tco = baud_co[DefSpeed]; /* Tx CO */
+ info->rbpr = baud_bpr[DefSpeed]; /* Rx BPR */
+ info->rco = baud_co[DefSpeed] >> 5; /* Rx CO */
+ info->close_delay = 0;
+ info->x_char = 0;
+ info->event = 0;
+ info->count = 0;
+#ifdef SERIAL_DEBUG_COUNT
+ printk("cyc: %d: setting count to 0\n", __LINE__);
+#endif
+ info->blocked_open = 0;
+ info->default_threshold = 0;
+ info->default_timeout = 0;
+ info->tqueue.routine = do_softint;
+ info->tqueue.data = info;
+ info->callout_termios =cy_callout_driver.init_termios;
+ info->normal_termios = cy_serial_driver.init_termios;
+ info->open_wait = 0;
+ info->close_wait = 0;
+ /* info->session */
+ /* info->pgrp */
+/*** !!!!!!!! this may expose new bugs !!!!!!!!! *********/
+ info->read_status_mask = CyTIMEOUT| CySPECHAR| CyBREAK
+ | CyPARITY| CyFRAME| CyOVERRUN;
+ /* info->timeout */
+
+ printk("ttyS%1d ", info->line);
+ port_num++;info++;
+ if(!(port_num & 7)){
+ printk("\n ");
+ }
+ }
+ }
+ printk("\n");
+ }
+ while( port_num < NR_PORTS){
+ info->line = -1;
+ port_num++;info++;
+ }
+#ifdef CONFIG_REMOTE_DEBUG
+ debug_setup();
+#endif
+ if (request_irq (MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt, 0,
+ "cd2401_errors", cd2401_rxerr_interrupt) ||
+ request_irq (MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt, 0,
+ "cd2401_modem", cd2401_modem_interrupt) ||
+ request_irq (MVME167_IRQ_SER_TX, cd2401_tx_interrupt, 0,
+ "cd2401_txints", cd2401_tx_interrupt) ||
+ request_irq (MVME167_IRQ_SER_RX, cd2401_rx_interrupt, 0,
+ "cd2401_rxints", cd2401_rx_interrupt))
+ {
+ panic ("Couldn't get serial IRQs");
+ }
+
+ /* Now we have registered the interrupt handlers, allow the interrupts */
+
+ pcc2chip[PccSCCMICR] = 0x15; /* Serial ints are level 5 */
+ pcc2chip[PccSCCTICR] = 0x15;
+ pcc2chip[PccSCCRICR] = 0x15;
+
+ pcc2chip[PccIMLR] = 3; /* Allow PCC2 ints above 3!? */
+
+ return 0;
+} /* serial167_init */
+
+
+#ifdef CYCLOM_SHOW_STATUS
+static void
+show_status(int line_num)
+{
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ int channel;
+ struct cyclades_port * info;
+ unsigned long flags;
+
+ info = &cy_port[line_num];
+ channel = info->line;
+ printk(" channel %d\n", channel);/**/
+
+ printk(" cy_port\n");
+ printk(" card line flags = %d %d %x\n",
+ info->card, info->line, info->flags);
+ printk(" *tty read_status_mask timeout xmit_fifo_size = %lx %x %x %x\n",
+ (long)info->tty, info->read_status_mask,
+ info->timeout, info->xmit_fifo_size);
+ printk(" cor1,cor2,cor3,cor4,cor5,cor6,cor7 = %x %x %x %x %x %x %x\n",
+ info->cor1, info->cor2, info->cor3, info->cor4, info->cor5,
+ info->cor6, info->cor7);
+ printk(" tbpr,tco,rbpr,rco = %d %d %d %d\n",
+ info->tbpr, info->tco, info->rbpr, info->rco);
+ printk(" close_delay event count = %d %d %d\n",
+ info->close_delay, info->event, info->count);
+ printk(" x_char blocked_open = %x %x\n",
+ info->x_char, info->blocked_open);
+ printk(" session pgrp open_wait = %lx %lx %lx\n",
+ info->session, info->pgrp, (long)info->open_wait);
+
+
+ save_flags(flags); cli();
+
+/* Global Registers */
+
+ printk(" CyGFRCR %x\n", base_addr[CyGFRCR]);
+ printk(" CyCAR %x\n", base_addr[CyCAR]);
+ printk(" CyRISR %x\n", base_addr[CyRISR]);
+ printk(" CyTISR %x\n", base_addr[CyTISR]);
+ printk(" CyMISR %x\n", base_addr[CyMISR]);
+ printk(" CyRIR %x\n", base_addr[CyRIR]);
+ printk(" CyTIR %x\n", base_addr[CyTIR]);
+ printk(" CyMIR %x\n", base_addr[CyMIR]);
+ printk(" CyTPR %x\n", base_addr[CyTPR]);
+
+ base_addr[CyCAR] = (u_char)channel;
+
+/* Virtual Registers */
+
+#if 0
+ printk(" CyRIVR %x\n", base_addr[CyRIVR]);
+ printk(" CyTIVR %x\n", base_addr[CyTIVR]);
+ printk(" CyMIVR %x\n", base_addr[CyMIVR]);
+ printk(" CyMISR %x\n", base_addr[CyMISR]);
+#endif
+
+/* Channel Registers */
+
+ printk(" CyCCR %x\n", base_addr[CyCCR]);
+ printk(" CyIER %x\n", base_addr[CyIER]);
+ printk(" CyCOR1 %x\n", base_addr[CyCOR1]);
+ printk(" CyCOR2 %x\n", base_addr[CyCOR2]);
+ printk(" CyCOR3 %x\n", base_addr[CyCOR3]);
+ printk(" CyCOR4 %x\n", base_addr[CyCOR4]);
+ printk(" CyCOR5 %x\n", base_addr[CyCOR5]);
+#if 0
+ printk(" CyCCSR %x\n", base_addr[CyCCSR]);
+ printk(" CyRDCR %x\n", base_addr[CyRDCR]);
+#endif
+ printk(" CySCHR1 %x\n", base_addr[CySCHR1]);
+ printk(" CySCHR2 %x\n", base_addr[CySCHR2]);
+#if 0
+ printk(" CySCHR3 %x\n", base_addr[CySCHR3]);
+ printk(" CySCHR4 %x\n", base_addr[CySCHR4]);
+ printk(" CySCRL %x\n", base_addr[CySCRL]);
+ printk(" CySCRH %x\n", base_addr[CySCRH]);
+ printk(" CyLNC %x\n", base_addr[CyLNC]);
+ printk(" CyMCOR1 %x\n", base_addr[CyMCOR1]);
+ printk(" CyMCOR2 %x\n", base_addr[CyMCOR2]);
+#endif
+ printk(" CyRTPRL %x\n", base_addr[CyRTPRL]);
+ printk(" CyRTPRH %x\n", base_addr[CyRTPRH]);
+ printk(" CyMSVR1 %x\n", base_addr[CyMSVR1]);
+ printk(" CyMSVR2 %x\n", base_addr[CyMSVR2]);
+ printk(" CyRBPR %x\n", base_addr[CyRBPR]);
+ printk(" CyRCOR %x\n", base_addr[CyRCOR]);
+ printk(" CyTBPR %x\n", base_addr[CyTBPR]);
+ printk(" CyTCOR %x\n", base_addr[CyTCOR]);
+
+ restore_flags(flags);
+} /* show_status */
+#endif
+
+
+#if 0
+/* Dummy routine in mvme16x/config.c for now */
+
+/* Serial console setup. Called from linux/init/main.c */
+
+void console_setup(char *str, int *ints)
+{
+ char *s;
+ int baud, bits, parity;
+ int cflag = 0;
+
+ /* Sanity check. */
+ if (ints[0] > 3 || ints[1] > 3) return;
+
+ /* Get baud, bits and parity */
+ baud = 2400;
+ bits = 8;
+ parity = 'n';
+ if (ints[2]) baud = ints[2];
+ if ((s = strchr(str, ','))) {
+ do {
+ s++;
+ } while(*s >= '0' && *s <= '9');
+ if (*s) parity = *s++;
+ if (*s) bits = *s - '0';
+ }
+
+ /* Now construct a cflag setting. */
+ switch(baud) {
+ case 1200:
+ cflag |= B1200;
+ break;
+ case 9600:
+ cflag |= B9600;
+ break;
+ case 19200:
+ cflag |= B19200;
+ break;
+ case 38400:
+ cflag |= B38400;
+ break;
+ case 2400:
+ default:
+ cflag |= B2400;
+ break;
+ }
+ switch(bits) {
+ case 7:
+ cflag |= CS7;
+ break;
+ default:
+ case 8:
+ cflag |= CS8;
+ break;
+ }
+ switch(parity) {
+ case 'o': case 'O':
+ cflag |= PARODD;
+ break;
+ case 'e': case 'E':
+ cflag |= PARENB;
+ break;
+ }
+
+ serial_console_info = &cy_port[ints[1]];
+ serial_console_cflag = cflag;
+ serial_console = ints[1] + 64; /*callout_driver.minor_start*/
+}
+#endif
+
+/*
+ * The following is probably out of date for 2.1.x serial console stuff.
+ *
+ * The console is registered early on from arch/m68k/kernel/setup.c, and
+ * it therefore relies on the chip being setup correctly by 166-Bug. This
+ * seems reasonable, as the serial port has been used to invoke the system
+ * boot. It also means that this function must not rely on any data
+ * initialisation performed by serial167_init() etc.
+ *
+ * Of course, once the console has been registered, we had better ensure
+ * that serial167_init() doesn't leave the chip non-functional.
+ */
+
+void serial167_write(struct console *co, const char *str, unsigned count)
+{
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ unsigned long flags;
+ volatile u_char sink;
+ u_char ier;
+ int port;
+ u_char do_lf = 0;
+ int i = 0;
+
+ save_flags(flags); cli();
+
+ /* Ensure transmitter is enabled! */
+
+ port = 0;
+ base_addr[CyCAR] = (u_char)port;
+ while (base_addr[CyCCR])
+ ;
+ base_addr[CyCCR] = CyENB_XMTR;
+
+ ier = base_addr[CyIER];
+ base_addr[CyIER] = CyTxMpty;
+
+ while (1) {
+ if (pcc2chip[PccSCCTICR] & 0x20)
+ {
+ /* We have a Tx int. Acknowledge it */
+ sink = pcc2chip[PccTPIACKR];
+ if ((base_addr[CyLICR] >> 2) == port) {
+ if (i == count) {
+ /* Last char of string is now output */
+ base_addr[CyTEOIR] = CyNOTRANS;
+ break;
+ }
+ if (do_lf) {
+ base_addr[CyTDR] = '\n';
+ str++;
+ i++;
+ do_lf = 0;
+ }
+ else if (*str == '\n') {
+ base_addr[CyTDR] = '\r';
+ do_lf = 1;
+ }
+ else {
+ base_addr[CyTDR] = *str++;
+ i++;
+ }
+ base_addr[CyTEOIR] = 0;
+ }
+ else
+ base_addr[CyTEOIR] = CyNOTRANS;
+ }
+ }
+
+ base_addr[CyIER] = ier;
+
+ restore_flags(flags);
+}
+
+#ifdef CONFIG_REMOTE_DEBUG
+void putDebugChar (int c)
+{
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ unsigned long flags;
+ volatile u_char sink;
+ u_char ier;
+ int port;
+
+ save_flags(flags); cli();
+
+ /* Ensure transmitter is enabled! */
+
+ port = DEBUG_PORT;
+ base_addr[CyCAR] = (u_char)port;
+ while (base_addr[CyCCR])
+ ;
+ base_addr[CyCCR] = CyENB_XMTR;
+
+ ier = base_addr[CyIER];
+ base_addr[CyIER] = CyTxMpty;
+
+ while (1) {
+ if (pcc2chip[PccSCCTICR] & 0x20)
+ {
+ /* We have a Tx int. Acknowledge it */
+ sink = pcc2chip[PccTPIACKR];
+ if ((base_addr[CyLICR] >> 2) == port) {
+ base_addr[CyTDR] = c;
+ base_addr[CyTEOIR] = 0;
+ break;
+ }
+ else
+ base_addr[CyTEOIR] = CyNOTRANS;
+ }
+ }
+
+ base_addr[CyIER] = ier;
+
+ restore_flags(flags);
+}
+
+int getDebugChar()
+{
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ unsigned long flags;
+ volatile u_char sink;
+ u_char ier;
+ int port;
+ int i, c;
+
+ i = debugiq.out;
+ if (i != debugiq.in) {
+ c = debugiq.buf[i];
+ if (++i == DEBUG_LEN)
+ i = 0;
+ debugiq.out = i;
+ return c;
+ }
+ /* OK, nothing in queue, wait in poll loop */
+
+ save_flags(flags); cli();
+
+ /* Ensure receiver is enabled! */
+
+ port = DEBUG_PORT;
+ base_addr[CyCAR] = (u_char)port;
+#if 0
+ while (base_addr[CyCCR])
+ ;
+ base_addr[CyCCR] = CyENB_RCVR;
+#endif
+ ier = base_addr[CyIER];
+ base_addr[CyIER] = CyRxData;
+
+ while (1) {
+ if (pcc2chip[PccSCCRICR] & 0x20)
+ {
+ /* We have a Rx int. Acknowledge it */
+ sink = pcc2chip[PccRPIACKR];
+ if ((base_addr[CyLICR] >> 2) == port) {
+ int cnt = base_addr[CyRFOC];
+ while (cnt-- > 0)
+ {
+ c = base_addr[CyRDR];
+ if (c == 0)
+ printk ("!! debug char is null (cnt=%d) !!", cnt);
+ else
+ queueDebugChar (c);
+ }
+ base_addr[CyREOIR] = 0;
+ i = debugiq.out;
+ if (i == debugiq.in)
+ panic ("Debug input queue empty!");
+ c = debugiq.buf[i];
+ if (++i == DEBUG_LEN)
+ i = 0;
+ debugiq.out = i;
+ break;
+ }
+ else
+ base_addr[CyREOIR] = CyNOTRANS;
+ }
+ }
+
+ base_addr[CyIER] = ier;
+
+ restore_flags(flags);
+
+ return (c);
+}
+
+void queueDebugChar (int c)
+{
+ int i;
+
+ i = debugiq.in;
+ debugiq.buf[i] = c;
+ if (++i == DEBUG_LEN)
+ i = 0;
+ if (i != debugiq.out)
+ debugiq.in = i;
+}
+
+static void
+debug_setup()
+{
+ unsigned long flags;
+ volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
+ int i, cflag;
+
+ cflag = B19200;
+
+ save_flags(flags); cli();
+
+ for (i = 0; i < 4; i++)
+ {
+ base_addr[CyCAR] = i;
+ base_addr[CyLICR] = i << 2;
+ }
+
+ debugiq.in = debugiq.out = 0;
+
+ base_addr[CyCAR] = DEBUG_PORT;
+
+ /* baud rate */
+ i = cflag & CBAUD;
+
+ base_addr[CyIER] = 0;
+
+ base_addr[CyCMR] = CyASYNC;
+ base_addr[CyLICR] = DEBUG_PORT << 2;
+ base_addr[CyLIVR] = 0x5c;
+
+ /* tx and rx baud rate */
+
+ base_addr[CyTCOR] = baud_co[i];
+ base_addr[CyTBPR] = baud_bpr[i];
+ base_addr[CyRCOR] = baud_co[i] >> 5;
+ base_addr[CyRBPR] = baud_bpr[i];
+
+ /* set line characteristics according configuration */
+
+ base_addr[CySCHR1] = 0;
+ base_addr[CySCHR2] = 0;
+ base_addr[CySCRL] = 0;
+ base_addr[CySCRH] = 0;
+ base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE;
+ base_addr[CyCOR2] = 0;
+ base_addr[CyCOR3] = Cy_1_STOP;
+ base_addr[CyCOR4] = baud_cor4[i];
+ base_addr[CyCOR5] = 0;
+ base_addr[CyCOR6] = 0;
+ base_addr[CyCOR7] = 0;
+
+ write_cy_cmd(base_addr,CyINIT_CHAN);
+ write_cy_cmd(base_addr,CyENB_RCVR);
+
+ base_addr[CyCAR] = DEBUG_PORT; /* !!! Is this needed? */
+
+ base_addr[CyRTPRL] = 2;
+ base_addr[CyRTPRH] = 0;
+
+ base_addr[CyMSVR1] = CyRTS;
+ base_addr[CyMSVR2] = CyDTR;
+
+ base_addr[CyIER] = CyRxData;
+
+ restore_flags(flags);
+
+} /* debug_setup */
+
+#endif
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov