serial167.c
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- /*
- * 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;
- *
- * Changes:
- *
- * 200 lines of changes record removed - RGH 11-10-95, starting work on
- * converting this to drive serial ports on mvme166 (cd2401).
- *
- * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 2000/08/25
- * - get rid of verify_area
- * - use get_user to access memory from userspace in set_threshold,
- * set_default_threshold and set_timeout
- * - don't use the panic function in serial167_init
- * - do resource release on failure on serial167_init
- * - include missing restore_flags in mvme167_serial_console_setup
- */
- #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/serialP.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 <linux/module.h>
- #include <asm/system.h>
- #include <asm/io.h>
- #include <asm/segment.h>
- #include <asm/bitops.h>
- #include <asm/mvme16xhw.h>
- #include <asm/bootinfo.h>
- #include <asm/setup.h>
- #include <linux/types.h>
- #include <linux/kernel.h>
- #include <linux/version.h>
- #include <asm/uaccess.h>
- #include <linux/init.h>
- #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;
- DECLARE_MUTEX(tmp_buf_sem);
- /*
- * 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 %sn";
- static const char *badinfo =
- "Warning: null cyclades_port for (%d, %d) in %sn";
- static const char *badrange =
- "Warning: cyclades_port out of range for (%d, %d) in %sn";
- 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%dn", 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%dn", 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 %dn", 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 DTRn", __LINE__);
- printk(" status: 0x%x, 0x%xn", 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(" donen");
- #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 %dn", 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 DTRn", __LINE__);
- printk(" status: 0x%x, 0x%xn", 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(" donen");
- #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 DTRn", __LINE__);
- printk(" status: 0x%x, 0x%xn", 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 DTRn", __LINE__);
- printk(" status: 0x%x, 0x%xn", 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%dn", 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%dn", info->line); /* */
- #endif
- if (serial_paranoia_check(info, tty->device, "cy_write")){
- return 0;
- }
-
- if (!tty || !info->xmit_buf || !tmp_buf){
- return 0;
- }
- if (from_user) {
- down(&tmp_buf_sem);
- while (1) {
- c = MIN(count, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
- SERIAL_XMIT_SIZE - info->xmit_head));
- if (c <= 0)
- break;
- c -= copy_from_user(tmp_buf, buf, c);
- if (!c) {
- if (!total)
- total = -EFAULT;
- break;
- }
- save_flags(flags); cli();
- c = MIN(c, MIN(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
- SERIAL_XMIT_SIZE - info->xmit_head));
- memcpy(info->xmit_buf + info->xmit_head, tmp_buf, c);
- info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
- info->xmit_cnt += c;
- restore_flags(flags);
- buf += c;
- count -= c;
- total += c;
- }
- up(&tmp_buf_sem);
- } else {
- 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;
- }
- 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%dn", 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 %dn", 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%dn", 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%dn", 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%dn", 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; /*!!!*/
- return copy_to_user(retinfo,&tmp,sizeof(*retinfo)) ? -EFAULT : 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;
- if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
- return -EFAULT;
- 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);
- return put_user(result,(unsigned int *) value);
- } /* 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;
-
- if (get_user(arg, (unsigned long *) value))
- return -EFAULT;
- 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 DTRn", __LINE__);
- printk(" status: 0x%x, 0x%xn", 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 DTRn", __LINE__);
- printk(" status: 0x%x, 0x%xn", 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 DTRn", __LINE__);
- printk(" status: 0x%x, 0x%xn", 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 DTRn", __LINE__);
- printk(" status: 0x%x, 0x%xn", 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)
- {
- if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
- return -EFAULT;
- 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 *arg)
- {
- volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
- unsigned long value;
- int channel;
-
- if (get_user(value, arg))
- return -EFAULT;
- 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;
- return put_user(tmp,value);
- }
- static int
- set_default_threshold(struct cyclades_port * info, unsigned long *arg)
- {
- unsigned long value;
- if (get_user(value, arg))
- return -EFAULT;
- info->default_threshold = value & 0x0f;
- return 0;
- }
- static int
- get_default_threshold(struct cyclades_port * info, unsigned long *value)
- {
- return put_user(info->default_threshold,value);
- }
- static int
- set_timeout(struct cyclades_port * info, unsigned long *arg)
- {
- volatile unsigned char *base_addr = (u_char *)BASE_ADDR;
- int channel;
- unsigned long value;
- if (get_user(value, arg))
- return -EFAULT;
-
- 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];
- return put_user(tmp,value);
- }
- 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)
- {
- return put_user(info->default_timeout,value);
- }
- static int
- cy_ioctl(struct tty_struct *tty, struct file * file,
- unsigned int cmd, unsigned long arg)
- {
- unsigned long val;
- 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 = %lxn", info->line, cmd, arg); /* */
- #endif
- switch (cmd) {
- case CYGETMON:
- ret_val = get_mon_info(info, (struct cyclades_monitor *)arg);
- break;
- case CYGETTHRESH:
- ret_val = get_threshold(info, (unsigned long *)arg);
- break;
- case CYSETTHRESH:
- ret_val = set_threshold(info, (unsigned long *)arg);
- break;
- case CYGETDEFTHRESH:
- ret_val = get_default_threshold(info, (unsigned long *)arg);
- break;
- case CYSETDEFTHRESH:
- ret_val = set_default_threshold(info, (unsigned long *)arg);
- break;
- case CYGETTIMEOUT:
- ret_val = get_timeout(info, (unsigned long *)arg);
- break;
- case CYSETTIMEOUT:
- ret_val = set_timeout(info, (unsigned long *)arg);
- break;
- case CYGETDEFTIMEOUT:
- 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)
- break;
- 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)
- break;
- 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:
- ret_val = put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long *) arg);
- break;
- case TIOCSSOFTCAR:
- ret_val = get_user(val, (unsigned long *) arg);
- if (ret_val)
- break;
- tty->termios->c_cflag =
- ((tty->termios->c_cflag & ~CLOCAL) | (val ? CLOCAL : 0));
- break;
- case TIOCMGET:
- ret_val = get_modem_info(info, (unsigned int *) arg);
- break;
- case TIOCGSERIAL:
- 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 donen");
- #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%dn", 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%dn", info->line);
- #endif
- if (!info
- || serial_paranoia_check(info, tty->device, "cy_close")){
- return;
- }
- #ifdef SERIAL_DEBUG_OPEN
- printk("cy_close ttyS%d, count = %dn", 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 %dn", info->count);
- info->count = 1;
- }
- #ifdef SERIAL_DEBUG_COUNT
- printk("cyc: %d: decrementing count to %dn", __LINE__, info->count - 1);
- #endif
- if (--info->count < 0) {
- printk("cy_close: bad serial port count for ttys%d: %dn",
- info->line, info->count);
- #ifdef SERIAL_DEBUG_COUNT
- printk("cyc: %d: setting count to 0n", __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;
- schedule_timeout(info->close_delay);
- }
- wake_up_interruptible(&info->open_wait);
- }
- info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE|
- ASYNC_CLOSING);
- wake_up_interruptible(&info->close_wait);
- #ifdef SERIAL_DEBUG_OTHER
- printk("cy_close donen");
- #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%dn", 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 0n", __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)
- {
- DECLARE_WAITQUEUE(wait, current);
- 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 = %dn",
- info->line, info->count);/**/
- #endif
- info->count--;
- #ifdef SERIAL_DEBUG_COUNT
- printk("cyc: %d: decrementing count to %dn", __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 DTRn", __LINE__);
- printk(" status: 0x%x, 0x%xn", base_addr[CyMSVR1], base_addr[CyMSVR2]);
- #endif
- }
- restore_flags(flags);
- set_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 = %dn",
- 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 %dn", __LINE__, info->count);
- #endif
- }
- info->blocked_open--;
- #ifdef SERIAL_DEBUG_OPEN
- printk("block_til_ready after blocking: ttyS%d, count = %dn",
- 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%dn", info->line); /* */
- #endif
- if (serial_paranoia_check(info, tty->device, "cy_open")){
- return -ENODEV;
- }
- #ifdef SERIAL_DEBUG_OPEN
- printk("cy_open ttyS%d, count = %dn", info->line, info->count);/**/
- #endif
- info->count++;
- #ifdef SERIAL_DEBUG_COUNT
- printk("cyc: %d: incrementing count to %dn", __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 %dn",
- retval);
- #endif
- return retval;
- }
- info->session = current->session;
- info->pgrp = current->pgrp;
- #ifdef SERIAL_DEBUG_OPEN
- printk("cy_open donen");/**/
- #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 drivern");
- } /* 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){
- restore_flags(flags);
- /* 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){
- restore_flags(flags);
- /* 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%02xn", base_addr[CyGFRCR]);
- if (badspeed)
- printk(" WARNING: Failed to identify line speed, rcor=%02x,rbpr=%02xn",
- 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 ret = 0;
- 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] = '';
- #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;
- #ifdef CONFIG_DEVFS_FS
- cy_serial_driver.name = "tts/%d";
- #else
- cy_serial_driver.name = "ttyS";
- #endif
- 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;
- #ifdef CONFIG_DEVFS_FS
- cy_callout_driver.name = "cua/%d";
- #else
- cy_callout_driver.name = "cua";
- #endif
- cy_callout_driver.major = TTYAUX_MAJOR;
- cy_callout_driver.subtype = SERIAL_TYPE_CALLOUT;
- ret = tty_register_driver(&cy_serial_driver);
- if (ret) {
- printk(KERN_ERR "Couldn't register MVME166/7 serial drivern");
- return ret;
- }
- ret = tty_register_driver(&cy_callout_driver);
- if (ret) {
- printk(KERN_ERR "Couldn't register MVME166/7 callout drivern");
- goto cleanup_serial_driver;
- }
- 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 0n", __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;
- init_waitqueue_head(&info->open_wait);
- init_waitqueue_head(&info->close_wait);
- /* 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
- ret = request_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt, 0,
- "cd2401_errors", cd2401_rxerr_interrupt);
- if (ret) {
- printk(KERN_ERR "Could't get cd2401_errors IRQ");
- goto cleanup_callout_driver;
- }
- ret = request_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt, 0,
- "cd2401_modem", cd2401_modem_interrupt);
- if (ret) {
- printk(KERN_ERR "Could't get cd2401_modem IRQ");
- goto cleanup_irq_cd2401_errors;
- }
- ret = request_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt, 0,
- "cd2401_txints", cd2401_tx_interrupt);
- if (ret) {
- printk(KERN_ERR "Could't get cd2401_txints IRQ");
- goto cleanup_irq_cd2401_modem;
- }
- ret = request_irq(MVME167_IRQ_SER_RX, cd2401_rx_interrupt, 0,
- "cd2401_rxints", cd2401_rx_interrupt);
- if (ret) {
- printk(KERN_ERR "Could't get cd2401_rxints IRQ");
- goto cleanup_irq_cd2401_txints;
- }
- /* 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;
- cleanup_irq_cd2401_txints:
- free_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt);
- cleanup_irq_cd2401_modem:
- free_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt);
- cleanup_irq_cd2401_errors:
- free_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt);
- cleanup_callout_driver:
- if (tty_unregister_driver(&cy_callout_driver))
- printk(KERN_ERR "Couldn't unregister MVME166/7 callout drivern");
- cleanup_serial_driver:
- if (tty_unregister_driver(&cy_serial_driver))
- printk(KERN_ERR "Couldn't unregister MVME166/7 serial drivern");
- return ret;
- } /* 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 %dn", channel);/**/
- printk(" cy_portn");
- printk(" card line flags = %d %d %xn",
- info->card, info->line, info->flags);
- printk(" *tty read_status_mask timeout xmit_fifo_size = %lx %x %x %xn",
- (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 %xn",
- info->cor1, info->cor2, info->cor3, info->cor4, info->cor5,
- info->cor6, info->cor7);
- printk(" tbpr,tco,rbpr,rco = %d %d %d %dn",
- info->tbpr, info->tco, info->rbpr, info->rco);
- printk(" close_delay event count = %d %d %dn",
- info->close_delay, info->event, info->count);
- printk(" x_char blocked_open = %x %xn",
- info->x_char, info->blocked_open);
- printk(" session pgrp open_wait = %lx %lx %lxn",
- info->session, info->pgrp, (long)info->open_wait);
- save_flags(flags); cli();
- /* Global Registers */
- printk(" CyGFRCR %xn", base_addr[CyGFRCR]);
- printk(" CyCAR %xn", base_addr[CyCAR]);
- printk(" CyRISR %xn", base_addr[CyRISR]);
- printk(" CyTISR %xn", base_addr[CyTISR]);
- printk(" CyMISR %xn", base_addr[CyMISR]);
- printk(" CyRIR %xn", base_addr[CyRIR]);
- printk(" CyTIR %xn", base_addr[CyTIR]);
- printk(" CyMIR %xn", base_addr[CyMIR]);
- printk(" CyTPR %xn", base_addr[CyTPR]);
- base_addr[CyCAR] = (u_char)channel;
- /* Virtual Registers */
- #if 0
- printk(" CyRIVR %xn", base_addr[CyRIVR]);
- printk(" CyTIVR %xn", base_addr[CyTIVR]);
- printk(" CyMIVR %xn", base_addr[CyMIVR]);
- printk(" CyMISR %xn", base_addr[CyMISR]);
- #endif
- /* Channel Registers */
- printk(" CyCCR %xn", base_addr[CyCCR]);
- printk(" CyIER %xn", base_addr[CyIER]);
- printk(" CyCOR1 %xn", base_addr[CyCOR1]);
- printk(" CyCOR2 %xn", base_addr[CyCOR2]);
- printk(" CyCOR3 %xn", base_addr[CyCOR3]);
- printk(" CyCOR4 %xn", base_addr[CyCOR4]);
- printk(" CyCOR5 %xn", base_addr[CyCOR5]);
- #if 0
- printk(" CyCCSR %xn", base_addr[CyCCSR]);
- printk(" CyRDCR %xn", base_addr[CyRDCR]);
- #endif
- printk(" CySCHR1 %xn", base_addr[CySCHR1]);
- printk(" CySCHR2 %xn", base_addr[CySCHR2]);
- #if 0
- printk(" CySCHR3 %xn", base_addr[CySCHR3]);
- printk(" CySCHR4 %xn", base_addr[CySCHR4]);
- printk(" CySCRL %xn", base_addr[CySCRL]);
- printk(" CySCRH %xn", base_addr[CySCRH]);
- printk(" CyLNC %xn", base_addr[CyLNC]);
- printk(" CyMCOR1 %xn", base_addr[CyMCOR1]);
- printk(" CyMCOR2 %xn", base_addr[CyMCOR2]);
- #endif
- printk(" CyRTPRL %xn", base_addr[CyRTPRL]);
- printk(" CyRTPRH %xn", base_addr[CyRTPRH]);
- printk(" CyMSVR1 %xn", base_addr[CyMSVR1]);
- printk(" CyMSVR2 %xn", base_addr[CyMSVR2]);
- printk(" CyRBPR %xn", base_addr[CyRBPR]);
- printk(" CyRCOR %xn", base_addr[CyRCOR]);
- printk(" CyTBPR %xn", base_addr[CyTBPR]);
- printk(" CyTCOR %xn", 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.
- *
- * The console must be locked when we get here.
- */
- void serial167_console_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);
- }
- static kdev_t serial167_console_device(struct console *c)
- {
- return MKDEV(TTY_MAJOR, 64 + c->index);
- }
- static int __init serial167_console_setup(struct console *co, char *options)
- {
- return 0;
- }
- static struct console sercons = {
- name: "ttyS",
- write: serial167_console_write,
- device: serial167_console_device,
- setup: serial167_console_setup,
- flags: CON_PRINTBUFFER,
- index: -1,
- };
- void __init serial167_console_init(void)
- {
- if (vme_brdtype == VME_TYPE_MVME166 ||
- vme_brdtype == VME_TYPE_MVME167 ||
- vme_brdtype == VME_TYPE_MVME177) {
- mvme167_serial_console_setup(0);
- register_console(&sercons);
- }
- }
- #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
- MODULE_LICENSE("GPL");