2 * linux/drivers/char/serial167.c
4 * Driver for MVME166/7 board serial ports, which are via a CD2401.
5 * Based very much on cyclades.c.
7 * MVME166/7 work by Richard Hirst [richard@sleepie.demon.co.uk]
9 * ==============================================================
11 * static char rcsid[] =
12 * "$Revision: 1.36.1.4 $$Date: 1995/03/29 06:14:14 $";
14 * linux/kernel/cyclades.c
16 * Maintained by Marcio Saito (cyclades@netcom.com) and
17 * Randolph Bentson (bentson@grieg.seaslug.org)
19 * Much of the design and some of the code came from serial.c
20 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
21 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
22 * and then fixed as suggested by Michael K. Johnson 12/12/92.
24 * This version does not support shared irq's.
26 * $Log: cyclades.c,v $
27 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
28 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
32 * 200 lines of changes record removed - RGH 11-10-95, starting work on
33 * converting this to drive serial ports on mvme166 (cd2401).
35 * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 2000/08/25
36 * - get rid of verify_area
37 * - use get_user to access memory from userspace in set_threshold,
38 * set_default_threshold and set_timeout
39 * - don't use the panic function in serial167_init
40 * - do resource release on failure on serial167_init
41 * - include missing restore_flags in mvme167_serial_console_setup
43 * Kars de Jong <jongk@linux-m68k.org> - 2004/09/06
44 * - replace bottom half handler with task queue handler
47 #include <linux/errno.h>
48 #include <linux/signal.h>
49 #include <linux/sched.h>
50 #include <linux/timer.h>
51 #include <linux/tty.h>
52 #include <linux/interrupt.h>
53 #include <linux/serial.h>
54 #include <linux/serialP.h>
55 #include <linux/string.h>
56 #include <linux/fcntl.h>
57 #include <linux/ptrace.h>
58 #include <linux/serial167.h>
59 #include <linux/delay.h>
60 #include <linux/major.h>
62 #include <linux/console.h>
63 #include <linux/module.h>
64 #include <linux/bitops.h>
65 #include <linux/tty_flip.h>
67 #include <asm/system.h>
69 #include <asm/mvme16xhw.h>
70 #include <asm/bootinfo.h>
71 #include <asm/setup.h>
73 #include <linux/types.h>
74 #include <linux/kernel.h>
76 #include <asm/uaccess.h>
77 #include <linux/init.h>
79 #define SERIAL_PARANOIA_CHECK
80 #undef SERIAL_DEBUG_OPEN
81 #undef SERIAL_DEBUG_THROTTLE
82 #undef SERIAL_DEBUG_OTHER
83 #undef SERIAL_DEBUG_IO
84 #undef SERIAL_DEBUG_COUNT
85 #undef SERIAL_DEBUG_DTR
86 #undef CYCLOM_16Y_HACK
87 #define CYCLOM_ENABLE_MONITORING
89 #define WAKEUP_CHARS 256
91 #define STD_COM_FLAGS (0)
93 static struct tty_driver *cy_serial_driver;
94 extern int serial_console;
95 static struct cyclades_port *serial_console_info = NULL;
96 static unsigned int serial_console_cflag = 0;
97 u_char initial_console_speed;
99 /* Base address of cd2401 chip on mvme166/7 */
101 #define BASE_ADDR (0xfff45000)
102 #define pcc2chip ((volatile u_char *)0xfff42000)
103 #define PccSCCMICR 0x1d
104 #define PccSCCTICR 0x1e
105 #define PccSCCRICR 0x1f
106 #define PccTPIACKR 0x25
107 #define PccRPIACKR 0x27
110 /* This is the per-port data structure */
111 struct cyclades_port cy_port[] = {
119 #define NR_PORTS ARRAY_SIZE(cy_port)
122 * This is used to look up the divisor speeds and the timeouts
123 * We're normally limited to 15 distinct baud rates. The extra
124 * are accessed via settings in info->flags.
125 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
126 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
129 static int baud_table[] = {
130 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
131 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
136 static char baud_co[] = { /* 25 MHz clock option table */
137 /* value => 00 01 02 03 04 */
138 /* divide by 8 32 128 512 2048 */
139 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
140 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
143 static char baud_bpr[] = { /* 25 MHz baud rate period table */
144 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
145 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
149 /* I think 166 brd clocks 2401 at 20MHz.... */
151 /* These values are written directly to tcor, and >> 5 for writing to rcor */
152 static u_char baud_co[] = { /* 20 MHz clock option table */
153 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x60, 0x60, 0x40,
154 0x40, 0x40, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
157 /* These values written directly to tbpr/rbpr */
158 static u_char baud_bpr[] = { /* 20 MHz baud rate period table */
159 0x00, 0xc0, 0x80, 0x58, 0x6c, 0x40, 0xc0, 0x81, 0x40, 0x81,
160 0x57, 0x40, 0x81, 0x40, 0x81, 0x40, 0x2b, 0x20, 0x15, 0x10
163 static u_char baud_cor4[] = { /* receive threshold */
164 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
165 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07
168 static void shutdown(struct cyclades_port *);
169 static int startup(struct cyclades_port *);
170 static void cy_throttle(struct tty_struct *);
171 static void cy_unthrottle(struct tty_struct *);
172 static void config_setup(struct cyclades_port *);
173 extern void console_print(const char *);
174 #ifdef CYCLOM_SHOW_STATUS
175 static void show_status(int);
178 #ifdef CONFIG_REMOTE_DEBUG
179 static void debug_setup(void);
180 void queueDebugChar(int c);
181 int getDebugChar(void);
184 #define DEBUG_LEN 256
189 unsigned char buf[DEBUG_LEN];
196 * I have my own version of udelay(), as it is needed when initialising
197 * the chip, before the delay loop has been calibrated. Should probably
198 * reference one of the vmechip2 or pccchip2 counter for an accurate
199 * delay, but this wild guess will do for now.
202 void my_udelay(long us)
205 volatile u_char *p = &x;
209 for (i = 100; i; i--)
213 static inline int serial_paranoia_check(struct cyclades_port *info, char *name,
216 #ifdef SERIAL_PARANOIA_CHECK
218 printk("Warning: null cyclades_port for (%s) in %s\n", name,
223 if ((long)info < (long)(&cy_port[0])
224 || (long)(&cy_port[NR_PORTS]) < (long)info) {
225 printk("Warning: cyclades_port out of range for (%s) in %s\n",
230 if (info->magic != CYCLADES_MAGIC) {
231 printk("Warning: bad magic number for serial struct (%s) in "
232 "%s\n", name, routine);
237 } /* serial_paranoia_check */
240 /* The following diagnostic routines allow the driver to spew
241 information on the screen, even (especially!) during interrupts.
246 local_irq_save(flags);
248 local_irq_restore(flags);
255 local_irq_save(flags);
258 local_irq_restore(flags);
263 (data < 10) ? CP(data + '0') : CP(data + 'A' - 10);
267 CP1((data >> 4) & 0x0f);
272 CP2((data >> 8) & 0xff);
277 CP4((data >> 16) & 0xffff);
282 /* This routine waits up to 1000 micro-seconds for the previous
283 command to the Cirrus chip to complete and then issues the
284 new command. An error is returned if the previous command
285 didn't finish within the time limit.
287 u_short write_cy_cmd(volatile u_char * base_addr, u_char cmd)
292 local_irq_save(flags);
293 /* Check to see that the previous command has completed */
294 for (i = 0; i < 100; i++) {
295 if (base_addr[CyCCR] == 0) {
300 /* if the CCR never cleared, the previous command
301 didn't finish within the "reasonable time" */
303 local_irq_restore(flags);
307 /* Issue the new command */
308 base_addr[CyCCR] = cmd;
309 local_irq_restore(flags);
313 /* cy_start and cy_stop provide software output flow control as a
314 function of XON/XOFF, software CTS, and other such stuff. */
316 static void cy_stop(struct tty_struct *tty)
318 struct cyclades_port *info = tty->driver_data;
319 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
323 #ifdef SERIAL_DEBUG_OTHER
324 printk("cy_stop %s\n", tty->name); /* */
327 if (serial_paranoia_check(info, tty->name, "cy_stop"))
330 channel = info->line;
332 local_irq_save(flags);
333 base_addr[CyCAR] = (u_char) (channel); /* index channel */
334 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
335 local_irq_restore(flags);
338 static void cy_start(struct tty_struct *tty)
340 struct cyclades_port *info = tty->driver_data;
341 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
345 #ifdef SERIAL_DEBUG_OTHER
346 printk("cy_start %s\n", tty->name); /* */
349 if (serial_paranoia_check(info, tty->name, "cy_start"))
352 channel = info->line;
354 local_irq_save(flags);
355 base_addr[CyCAR] = (u_char) (channel);
356 base_addr[CyIER] |= CyTxMpty;
357 local_irq_restore(flags);
360 /* The real interrupt service routines are called
361 whenever the card wants its hand held--chars
362 received, out buffer empty, modem change, etc.
364 static irqreturn_t cd2401_rxerr_interrupt(int irq, void *dev_id)
366 struct tty_struct *tty;
367 struct cyclades_port *info;
368 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
369 unsigned char err, rfoc;
373 /* determine the channel and change to that context */
374 channel = (u_short) (base_addr[CyLICR] >> 2);
375 info = &cy_port[channel];
376 info->last_active = jiffies;
378 if ((err = base_addr[CyRISR]) & CyTIMEOUT) {
379 /* This is a receive timeout interrupt, ignore it */
380 base_addr[CyREOIR] = CyNOTRANS;
384 /* Read a byte of data if there is any - assume the error
385 * is associated with this character */
387 if ((rfoc = base_addr[CyRFOC]) != 0)
388 data = base_addr[CyRDR];
392 /* if there is nowhere to put the data, discard it */
393 if (info->tty == 0) {
394 base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS;
396 } else { /* there is an open port for this data */
398 if (err & info->ignore_status_mask) {
399 base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS;
402 if (tty_buffer_request_room(tty, 1) != 0) {
403 if (err & info->read_status_mask) {
405 tty_insert_flip_char(tty, data,
407 if (info->flags & ASYNC_SAK) {
410 } else if (err & CyFRAME) {
411 tty_insert_flip_char(tty, data,
413 } else if (err & CyPARITY) {
414 tty_insert_flip_char(tty, data,
416 } else if (err & CyOVERRUN) {
417 tty_insert_flip_char(tty, 0,
420 If the flip buffer itself is
421 overflowing, we still lose
422 the next incoming character.
424 if (tty_buffer_request_room(tty, 1) !=
426 tty_insert_flip_char(tty, data,
429 /* These two conditions may imply */
430 /* a normal read should be done. */
431 /* else if(data & CyTIMEOUT) */
432 /* else if(data & CySPECHAR) */
434 tty_insert_flip_char(tty, 0,
438 tty_insert_flip_char(tty, data, TTY_NORMAL);
441 /* there was a software buffer overrun
442 and nothing could be done about it!!! */
445 tty_schedule_flip(tty);
447 base_addr[CyREOIR] = rfoc ? 0 : CyNOTRANS;
449 } /* cy_rxerr_interrupt */
451 static irqreturn_t cd2401_modem_interrupt(int irq, void *dev_id)
453 struct cyclades_port *info;
454 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
459 /* determine the channel and change to that context */
460 channel = (u_short) (base_addr[CyLICR] >> 2);
461 info = &cy_port[channel];
462 info->last_active = jiffies;
464 mdm_change = base_addr[CyMISR];
465 mdm_status = base_addr[CyMSVR1];
467 if (info->tty == 0) { /* nowhere to put the data, ignore it */
470 if ((mdm_change & CyDCD)
471 && (info->flags & ASYNC_CHECK_CD)) {
472 if (mdm_status & CyDCD) {
474 wake_up_interruptible(&info->open_wait);
477 tty_hangup(info->tty);
478 wake_up_interruptible(&info->open_wait);
479 info->flags &= ~ASYNC_NORMAL_ACTIVE;
482 if ((mdm_change & CyCTS)
483 && (info->flags & ASYNC_CTS_FLOW)) {
484 if (info->tty->stopped) {
485 if (mdm_status & CyCTS) {
486 /* !!! cy_start isn't used because... */
487 info->tty->stopped = 0;
488 base_addr[CyIER] |= CyTxMpty;
489 tty_wakeup(info->tty);
492 if (!(mdm_status & CyCTS)) {
493 /* !!! cy_stop isn't used because... */
494 info->tty->stopped = 1;
496 ~(CyTxMpty | CyTxRdy);
500 if (mdm_status & CyDSR) {
503 base_addr[CyMEOIR] = 0;
505 } /* cy_modem_interrupt */
507 static irqreturn_t cd2401_tx_interrupt(int irq, void *dev_id)
509 struct cyclades_port *info;
510 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
512 int char_count, saved_cnt;
515 /* determine the channel and change to that context */
516 channel = (u_short) (base_addr[CyLICR] >> 2);
518 #ifdef CONFIG_REMOTE_DEBUG
519 if (channel == DEBUG_PORT) {
520 panic("TxInt on debug port!!!");
524 info = &cy_port[channel];
526 /* validate the port number (as configured and open) */
527 if ((channel < 0) || (NR_PORTS <= channel)) {
528 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
529 base_addr[CyTEOIR] = CyNOTRANS;
532 info->last_active = jiffies;
533 if (info->tty == 0) {
534 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
535 base_addr[CyTEOIR] = CyNOTRANS;
539 /* load the on-chip space available for outbound data */
540 saved_cnt = char_count = base_addr[CyTFTC];
542 if (info->x_char) { /* send special char */
543 outch = info->x_char;
544 base_addr[CyTDR] = outch;
550 /* The Cirrus chip requires the "Embedded Transmit
551 Commands" of start break, delay, and end break
552 sequences to be sent. The duration of the
553 break is given in TICs, which runs at HZ
554 (typically 100) and the PPR runs at 200 Hz,
555 so the delay is duration * 200/HZ, and thus a
556 break can run from 1/100 sec to about 5/4 sec.
557 Need to check these values - RGH 141095.
559 base_addr[CyTDR] = 0; /* start break */
560 base_addr[CyTDR] = 0x81;
561 base_addr[CyTDR] = 0; /* delay a bit */
562 base_addr[CyTDR] = 0x82;
563 base_addr[CyTDR] = info->x_break * 200 / HZ;
564 base_addr[CyTDR] = 0; /* terminate break */
565 base_addr[CyTDR] = 0x83;
570 while (char_count > 0) {
571 if (!info->xmit_cnt) {
572 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
575 if (info->xmit_buf == 0) {
576 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
579 if (info->tty->stopped || info->tty->hw_stopped) {
580 base_addr[CyIER] &= ~(CyTxMpty | CyTxRdy);
583 /* Because the Embedded Transmit Commands have been
584 enabled, we must check to see if the escape
585 character, NULL, is being sent. If it is, we
586 must ensure that there is room for it to be
587 doubled in the output stream. Therefore we
588 no longer advance the pointer when the character
589 is fetched, but rather wait until after the check
590 for a NULL output character. (This is necessary
591 because there may not be room for the two chars
592 needed to send a NULL.
594 outch = info->xmit_buf[info->xmit_tail];
597 info->xmit_tail = (info->xmit_tail + 1)
599 base_addr[CyTDR] = outch;
602 if (char_count > 1) {
604 info->xmit_tail = (info->xmit_tail + 1)
606 base_addr[CyTDR] = outch;
607 base_addr[CyTDR] = 0;
616 if (info->xmit_cnt < WAKEUP_CHARS)
617 tty_wakeup(info->tty);
619 base_addr[CyTEOIR] = (char_count != saved_cnt) ? 0 : CyNOTRANS;
621 } /* cy_tx_interrupt */
623 static irqreturn_t cd2401_rx_interrupt(int irq, void *dev_id)
625 struct tty_struct *tty;
626 struct cyclades_port *info;
627 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
634 /* determine the channel and change to that context */
635 channel = (u_short) (base_addr[CyLICR] >> 2);
636 info = &cy_port[channel];
637 info->last_active = jiffies;
638 save_cnt = char_count = base_addr[CyRFOC];
640 #ifdef CONFIG_REMOTE_DEBUG
641 if (channel == DEBUG_PORT) {
642 while (char_count--) {
643 data = base_addr[CyRDR];
644 queueDebugChar(data);
648 /* if there is nowhere to put the data, discard it */
649 if (info->tty == 0) {
650 while (char_count--) {
651 data = base_addr[CyRDR];
653 } else { /* there is an open port for this data */
655 /* load # characters available from the chip */
657 #ifdef CYCLOM_ENABLE_MONITORING
658 ++info->mon.int_count;
659 info->mon.char_count += char_count;
660 if (char_count > info->mon.char_max)
661 info->mon.char_max = char_count;
662 info->mon.char_last = char_count;
664 len = tty_buffer_request_room(tty, char_count);
666 data = base_addr[CyRDR];
667 tty_insert_flip_char(tty, data, TTY_NORMAL);
668 #ifdef CYCLOM_16Y_HACK
672 tty_schedule_flip(tty);
675 base_addr[CyREOIR] = save_cnt ? 0 : CyNOTRANS;
677 } /* cy_rx_interrupt */
679 /* This is called whenever a port becomes active;
680 interrupts are enabled and DTR & RTS are turned on.
682 static int startup(struct cyclades_port *info)
685 volatile unsigned char *base_addr = (unsigned char *)BASE_ADDR;
688 if (info->flags & ASYNC_INITIALIZED) {
694 set_bit(TTY_IO_ERROR, &info->tty->flags);
698 if (!info->xmit_buf) {
699 info->xmit_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
700 if (!info->xmit_buf) {
707 channel = info->line;
709 #ifdef SERIAL_DEBUG_OPEN
710 printk("startup channel %d\n", channel);
713 local_irq_save(flags);
714 base_addr[CyCAR] = (u_char) channel;
715 write_cy_cmd(base_addr, CyENB_RCVR | CyENB_XMTR);
717 base_addr[CyCAR] = (u_char) channel; /* !!! Is this needed? */
718 base_addr[CyMSVR1] = CyRTS;
719 /* CP('S');CP('1'); */
720 base_addr[CyMSVR2] = CyDTR;
722 #ifdef SERIAL_DEBUG_DTR
723 printk("cyc: %d: raising DTR\n", __LINE__);
724 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
728 base_addr[CyIER] |= CyRxData;
729 info->flags |= ASYNC_INITIALIZED;
732 clear_bit(TTY_IO_ERROR, &info->tty->flags);
734 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
736 local_irq_restore(flags);
738 #ifdef SERIAL_DEBUG_OPEN
744 void start_xmit(struct cyclades_port *info)
747 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
750 channel = info->line;
751 local_irq_save(flags);
752 base_addr[CyCAR] = channel;
753 base_addr[CyIER] |= CyTxMpty;
754 local_irq_restore(flags);
758 * This routine shuts down a serial port; interrupts are disabled,
759 * and DTR is dropped if the hangup on close termio flag is on.
761 static void shutdown(struct cyclades_port *info)
764 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
767 if (!(info->flags & ASYNC_INITIALIZED)) {
772 channel = info->line;
774 #ifdef SERIAL_DEBUG_OPEN
775 printk("shutdown channel %d\n", channel);
778 /* !!! REALLY MUST WAIT FOR LAST CHARACTER TO BE
779 SENT BEFORE DROPPING THE LINE !!! (Perhaps
780 set some flag that is read when XMTY happens.)
781 Other choices are to delay some fixed interval
782 or schedule some later processing.
784 local_irq_save(flags);
785 if (info->xmit_buf) {
786 free_page((unsigned long)info->xmit_buf);
787 info->xmit_buf = NULL;
790 base_addr[CyCAR] = (u_char) channel;
791 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
792 base_addr[CyMSVR1] = 0;
793 /* CP('C');CP('1'); */
794 base_addr[CyMSVR2] = 0;
795 #ifdef SERIAL_DEBUG_DTR
796 printk("cyc: %d: dropping DTR\n", __LINE__);
797 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
801 write_cy_cmd(base_addr, CyDIS_RCVR);
802 /* it may be appropriate to clear _XMIT at
803 some later date (after testing)!!! */
806 set_bit(TTY_IO_ERROR, &info->tty->flags);
808 info->flags &= ~ASYNC_INITIALIZED;
809 local_irq_restore(flags);
811 #ifdef SERIAL_DEBUG_OPEN
817 * This routine finds or computes the various line characteristics.
819 static void config_setup(struct cyclades_port *info)
822 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
826 unsigned char ti, need_init_chan = 0;
828 if (!info->tty || !info->tty->termios) {
831 if (info->line == -1) {
834 cflag = info->tty->termios->c_cflag;
839 /* Starting with kernel 1.1.65, there is direct support for
840 higher baud rates. The following code supports those
841 changes. The conditional aspect allows this driver to be
842 used for earlier as well as later kernel versions. (The
843 mapping is slightly different from serial.c because there
844 is still the possibility of supporting 75 kbit/sec with
850 else if (i == B115200)
853 else if (i == B78600)
857 info->tty->termios->c_cflag &= ~CBAUDEX;
861 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
863 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
866 /* Don't ever change the speed of the console port. It will
867 * run at the speed specified in bootinfo, or at 19.2K */
868 /* Actually, it should run at whatever speed 166Bug was using */
869 /* Note info->timeout isn't used at present */
870 if (info != serial_console_info) {
871 info->tbpr = baud_bpr[i]; /* Tx BPR */
872 info->tco = baud_co[i]; /* Tx CO */
873 info->rbpr = baud_bpr[i]; /* Rx BPR */
874 info->rco = baud_co[i] >> 5; /* Rx CO */
875 if (baud_table[i] == 134) {
877 (info->xmit_fifo_size * HZ * 30 / 269) + 2;
878 /* get it right for 134.5 baud */
879 } else if (baud_table[i]) {
881 (info->xmit_fifo_size * HZ * 15 / baud_table[i]) +
883 /* this needs to be propagated into the card info */
888 /* By tradition (is it a standard?) a baud rate of zero
889 implies the line should be/has been closed. A bit
890 later in this routine such a test is performed. */
892 /* byte size and parity */
896 info->cor4 = (info->default_threshold ? info->default_threshold : baud_cor4[i]); /* receive threshold */
897 /* Following two lines added 101295, RGH. */
898 /* It is obviously wrong to access CyCORx, and not info->corx here,
899 * try and remember to fix it later! */
900 channel = info->line;
901 base_addr[CyCAR] = (u_char) channel;
902 if (C_CLOCAL(info->tty)) {
903 if (base_addr[CyIER] & CyMdmCh)
904 base_addr[CyIER] &= ~CyMdmCh; /* without modem intr */
905 /* ignore 1->0 modem transitions */
906 if (base_addr[CyCOR4] & (CyDSR | CyCTS | CyDCD))
907 base_addr[CyCOR4] &= ~(CyDSR | CyCTS | CyDCD);
908 /* ignore 0->1 modem transitions */
909 if (base_addr[CyCOR5] & (CyDSR | CyCTS | CyDCD))
910 base_addr[CyCOR5] &= ~(CyDSR | CyCTS | CyDCD);
912 if ((base_addr[CyIER] & CyMdmCh) != CyMdmCh)
913 base_addr[CyIER] |= CyMdmCh; /* with modem intr */
914 /* act on 1->0 modem transitions */
915 if ((base_addr[CyCOR4] & (CyDSR | CyCTS | CyDCD)) !=
916 (CyDSR | CyCTS | CyDCD))
917 base_addr[CyCOR4] |= CyDSR | CyCTS | CyDCD;
918 /* act on 0->1 modem transitions */
919 if ((base_addr[CyCOR5] & (CyDSR | CyCTS | CyDCD)) !=
920 (CyDSR | CyCTS | CyDCD))
921 base_addr[CyCOR5] |= CyDSR | CyCTS | CyDCD;
923 info->cor3 = (cflag & CSTOPB) ? Cy_2_STOP : Cy_1_STOP;
925 switch (cflag & CSIZE) {
927 info->cor1 = Cy_5_BITS;
930 info->cor1 = Cy_6_BITS;
933 info->cor1 = Cy_7_BITS;
936 info->cor1 = Cy_8_BITS;
939 if (cflag & PARENB) {
940 if (cflag & PARODD) {
941 info->cor1 |= CyPARITY_O;
943 info->cor1 |= CyPARITY_E;
946 info->cor1 |= CyPARITY_NONE;
949 /* CTS flow control flag */
951 /* Don't complcate matters for now! RGH 141095 */
952 if (cflag & CRTSCTS) {
953 info->flags |= ASYNC_CTS_FLOW;
954 info->cor2 |= CyCtsAE;
956 info->flags &= ~ASYNC_CTS_FLOW;
957 info->cor2 &= ~CyCtsAE;
961 info->flags &= ~ASYNC_CHECK_CD;
963 info->flags |= ASYNC_CHECK_CD;
965 /***********************************************
966 The hardware option, CyRtsAO, presents RTS when
967 the chip has characters to send. Since most modems
968 use RTS as reverse (inbound) flow control, this
969 option is not used. If inbound flow control is
970 necessary, DTR can be programmed to provide the
971 appropriate signals for use with a non-standard
972 cable. Contact Marcio Saito for details.
973 ***********************************************/
975 channel = info->line;
977 local_irq_save(flags);
978 base_addr[CyCAR] = (u_char) channel;
980 /* CyCMR set once only in mvme167_init_serial() */
981 if (base_addr[CyLICR] != channel << 2)
982 base_addr[CyLICR] = channel << 2;
983 if (base_addr[CyLIVR] != 0x5c)
984 base_addr[CyLIVR] = 0x5c;
986 /* tx and rx baud rate */
988 if (base_addr[CyCOR1] != info->cor1)
990 if (base_addr[CyTCOR] != info->tco)
991 base_addr[CyTCOR] = info->tco;
992 if (base_addr[CyTBPR] != info->tbpr)
993 base_addr[CyTBPR] = info->tbpr;
994 if (base_addr[CyRCOR] != info->rco)
995 base_addr[CyRCOR] = info->rco;
996 if (base_addr[CyRBPR] != info->rbpr)
997 base_addr[CyRBPR] = info->rbpr;
999 /* set line characteristics according configuration */
1001 if (base_addr[CySCHR1] != START_CHAR(info->tty))
1002 base_addr[CySCHR1] = START_CHAR(info->tty);
1003 if (base_addr[CySCHR2] != STOP_CHAR(info->tty))
1004 base_addr[CySCHR2] = STOP_CHAR(info->tty);
1005 if (base_addr[CySCRL] != START_CHAR(info->tty))
1006 base_addr[CySCRL] = START_CHAR(info->tty);
1007 if (base_addr[CySCRH] != START_CHAR(info->tty))
1008 base_addr[CySCRH] = START_CHAR(info->tty);
1009 if (base_addr[CyCOR1] != info->cor1)
1010 base_addr[CyCOR1] = info->cor1;
1011 if (base_addr[CyCOR2] != info->cor2)
1012 base_addr[CyCOR2] = info->cor2;
1013 if (base_addr[CyCOR3] != info->cor3)
1014 base_addr[CyCOR3] = info->cor3;
1015 if (base_addr[CyCOR4] != info->cor4)
1016 base_addr[CyCOR4] = info->cor4;
1017 if (base_addr[CyCOR5] != info->cor5)
1018 base_addr[CyCOR5] = info->cor5;
1019 if (base_addr[CyCOR6] != info->cor6)
1020 base_addr[CyCOR6] = info->cor6;
1021 if (base_addr[CyCOR7] != info->cor7)
1022 base_addr[CyCOR7] = info->cor7;
1025 write_cy_cmd(base_addr, CyINIT_CHAN);
1027 base_addr[CyCAR] = (u_char) channel; /* !!! Is this needed? */
1029 /* 2ms default rx timeout */
1030 ti = info->default_timeout ? info->default_timeout : 0x02;
1031 if (base_addr[CyRTPRL] != ti)
1032 base_addr[CyRTPRL] = ti;
1033 if (base_addr[CyRTPRH] != 0)
1034 base_addr[CyRTPRH] = 0;
1036 /* Set up RTS here also ????? RGH 141095 */
1037 if (i == 0) { /* baud rate is zero, turn off line */
1038 if ((base_addr[CyMSVR2] & CyDTR) == CyDTR)
1039 base_addr[CyMSVR2] = 0;
1040 #ifdef SERIAL_DEBUG_DTR
1041 printk("cyc: %d: dropping DTR\n", __LINE__);
1042 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1043 base_addr[CyMSVR2]);
1046 if ((base_addr[CyMSVR2] & CyDTR) != CyDTR)
1047 base_addr[CyMSVR2] = CyDTR;
1048 #ifdef SERIAL_DEBUG_DTR
1049 printk("cyc: %d: raising DTR\n", __LINE__);
1050 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1051 base_addr[CyMSVR2]);
1056 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1059 local_irq_restore(flags);
1061 } /* config_setup */
1063 static int cy_put_char(struct tty_struct *tty, unsigned char ch)
1065 struct cyclades_port *info = tty->driver_data;
1066 unsigned long flags;
1068 #ifdef SERIAL_DEBUG_IO
1069 printk("cy_put_char %s(0x%02x)\n", tty->name, ch);
1072 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
1075 if (!info->xmit_buf)
1078 local_irq_save(flags);
1079 if (info->xmit_cnt >= PAGE_SIZE - 1) {
1080 local_irq_restore(flags);
1084 info->xmit_buf[info->xmit_head++] = ch;
1085 info->xmit_head &= PAGE_SIZE - 1;
1087 local_irq_restore(flags);
1091 static void cy_flush_chars(struct tty_struct *tty)
1093 struct cyclades_port *info = tty->driver_data;
1094 unsigned long flags;
1095 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1098 #ifdef SERIAL_DEBUG_IO
1099 printk("cy_flush_chars %s\n", tty->name); /* */
1102 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
1105 if (info->xmit_cnt <= 0 || tty->stopped
1106 || tty->hw_stopped || !info->xmit_buf)
1109 channel = info->line;
1111 local_irq_save(flags);
1112 base_addr[CyCAR] = channel;
1113 base_addr[CyIER] |= CyTxMpty;
1114 local_irq_restore(flags);
1115 } /* cy_flush_chars */
1117 /* This routine gets called when tty_write has put something into
1118 the write_queue. If the port is not already transmitting stuff,
1119 start it off by enabling interrupts. The interrupt service
1120 routine will then ensure that the characters are sent. If the
1121 port is already active, there is no need to kick it.
1123 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1125 struct cyclades_port *info = tty->driver_data;
1126 unsigned long flags;
1129 #ifdef SERIAL_DEBUG_IO
1130 printk("cy_write %s\n", tty->name); /* */
1133 if (serial_paranoia_check(info, tty->name, "cy_write")) {
1137 if (!info->xmit_buf) {
1142 local_irq_save(flags);
1143 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1144 SERIAL_XMIT_SIZE - info->xmit_head));
1146 local_irq_restore(flags);
1150 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1152 (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1);
1153 info->xmit_cnt += c;
1154 local_irq_restore(flags);
1161 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
1167 static int cy_write_room(struct tty_struct *tty)
1169 struct cyclades_port *info = tty->driver_data;
1172 #ifdef SERIAL_DEBUG_IO
1173 printk("cy_write_room %s\n", tty->name); /* */
1176 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
1178 ret = PAGE_SIZE - info->xmit_cnt - 1;
1182 } /* cy_write_room */
1184 static int cy_chars_in_buffer(struct tty_struct *tty)
1186 struct cyclades_port *info = tty->driver_data;
1188 #ifdef SERIAL_DEBUG_IO
1189 printk("cy_chars_in_buffer %s %d\n", tty->name, info->xmit_cnt); /* */
1192 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
1195 return info->xmit_cnt;
1196 } /* cy_chars_in_buffer */
1198 static void cy_flush_buffer(struct tty_struct *tty)
1200 struct cyclades_port *info = tty->driver_data;
1201 unsigned long flags;
1203 #ifdef SERIAL_DEBUG_IO
1204 printk("cy_flush_buffer %s\n", tty->name); /* */
1207 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
1209 local_irq_save(flags);
1210 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1211 local_irq_restore(flags);
1213 } /* cy_flush_buffer */
1215 /* This routine is called by the upper-layer tty layer to signal
1216 that incoming characters should be throttled or that the
1217 throttle should be released.
1219 static void cy_throttle(struct tty_struct *tty)
1221 struct cyclades_port *info = tty->driver_data;
1222 unsigned long flags;
1223 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1226 #ifdef SERIAL_DEBUG_THROTTLE
1229 printk("throttle %s: %d....\n", tty_name(tty, buf),
1230 tty->ldisc.chars_in_buffer(tty));
1231 printk("cy_throttle %s\n", tty->name);
1234 if (serial_paranoia_check(info, tty->name, "cy_nthrottle")) {
1239 info->x_char = STOP_CHAR(tty);
1240 /* Should use the "Send Special Character" feature!!! */
1243 channel = info->line;
1245 local_irq_save(flags);
1246 base_addr[CyCAR] = (u_char) channel;
1247 base_addr[CyMSVR1] = 0;
1248 local_irq_restore(flags);
1251 static void cy_unthrottle(struct tty_struct *tty)
1253 struct cyclades_port *info = tty->driver_data;
1254 unsigned long flags;
1255 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1258 #ifdef SERIAL_DEBUG_THROTTLE
1261 printk("throttle %s: %d....\n", tty_name(tty, buf),
1262 tty->ldisc.chars_in_buffer(tty));
1263 printk("cy_unthrottle %s\n", tty->name);
1266 if (serial_paranoia_check(info, tty->name, "cy_nthrottle")) {
1271 info->x_char = START_CHAR(tty);
1272 /* Should use the "Send Special Character" feature!!! */
1275 channel = info->line;
1277 local_irq_save(flags);
1278 base_addr[CyCAR] = (u_char) channel;
1279 base_addr[CyMSVR1] = CyRTS;
1280 local_irq_restore(flags);
1281 } /* cy_unthrottle */
1284 get_serial_info(struct cyclades_port *info,
1285 struct serial_struct __user * retinfo)
1287 struct serial_struct tmp;
1292 memset(&tmp, 0, sizeof(tmp));
1293 tmp.type = info->type;
1294 tmp.line = info->line;
1295 tmp.port = info->line;
1297 tmp.flags = info->flags;
1298 tmp.baud_base = 0; /*!!! */
1299 tmp.close_delay = info->close_delay;
1300 tmp.custom_divisor = 0; /*!!! */
1301 tmp.hub6 = 0; /*!!! */
1302 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
1303 } /* get_serial_info */
1306 set_serial_info(struct cyclades_port *info,
1307 struct serial_struct __user * new_info)
1309 struct serial_struct new_serial;
1310 struct cyclades_port old_info;
1315 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1319 if (!capable(CAP_SYS_ADMIN)) {
1320 if ((new_serial.close_delay != info->close_delay) ||
1321 ((new_serial.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK) !=
1322 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK)))
1324 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
1325 (new_serial.flags & ASYNC_USR_MASK));
1326 goto check_and_exit;
1330 * OK, past this point, all the error checking has been done.
1331 * At this point, we start making changes.....
1334 info->flags = ((info->flags & ~ASYNC_FLAGS) |
1335 (new_serial.flags & ASYNC_FLAGS));
1336 info->close_delay = new_serial.close_delay;
1339 if (info->flags & ASYNC_INITIALIZED) {
1343 return startup(info);
1344 } /* set_serial_info */
1346 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
1348 struct cyclades_port *info = tty->driver_data;
1350 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1351 unsigned long flags;
1352 unsigned char status;
1354 channel = info->line;
1356 local_irq_save(flags);
1357 base_addr[CyCAR] = (u_char) channel;
1358 status = base_addr[CyMSVR1] | base_addr[CyMSVR2];
1359 local_irq_restore(flags);
1361 return ((status & CyRTS) ? TIOCM_RTS : 0)
1362 | ((status & CyDTR) ? TIOCM_DTR : 0)
1363 | ((status & CyDCD) ? TIOCM_CAR : 0)
1364 | ((status & CyDSR) ? TIOCM_DSR : 0)
1365 | ((status & CyCTS) ? TIOCM_CTS : 0);
1369 cy_tiocmset(struct tty_struct *tty, struct file *file,
1370 unsigned int set, unsigned int clear)
1372 struct cyclades_port *info = tty->driver_data;
1374 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1375 unsigned long flags;
1377 channel = info->line;
1379 if (set & TIOCM_RTS) {
1380 local_irq_save(flags);
1381 base_addr[CyCAR] = (u_char) channel;
1382 base_addr[CyMSVR1] = CyRTS;
1383 local_irq_restore(flags);
1385 if (set & TIOCM_DTR) {
1386 local_irq_save(flags);
1387 base_addr[CyCAR] = (u_char) channel;
1388 /* CP('S');CP('2'); */
1389 base_addr[CyMSVR2] = CyDTR;
1390 #ifdef SERIAL_DEBUG_DTR
1391 printk("cyc: %d: raising DTR\n", __LINE__);
1392 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1393 base_addr[CyMSVR2]);
1395 local_irq_restore(flags);
1398 if (clear & TIOCM_RTS) {
1399 local_irq_save(flags);
1400 base_addr[CyCAR] = (u_char) channel;
1401 base_addr[CyMSVR1] = 0;
1402 local_irq_restore(flags);
1404 if (clear & TIOCM_DTR) {
1405 local_irq_save(flags);
1406 base_addr[CyCAR] = (u_char) channel;
1407 /* CP('C');CP('2'); */
1408 base_addr[CyMSVR2] = 0;
1409 #ifdef SERIAL_DEBUG_DTR
1410 printk("cyc: %d: dropping DTR\n", __LINE__);
1411 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1412 base_addr[CyMSVR2]);
1414 local_irq_restore(flags);
1418 } /* set_modem_info */
1420 static void send_break(struct cyclades_port *info, int duration)
1421 { /* Let the transmit ISR take care of this (since it
1422 requires stuffing characters into the output stream).
1424 info->x_break = duration;
1425 if (!info->xmit_cnt) {
1431 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
1434 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
1436 info->mon.int_count = 0;
1437 info->mon.char_count = 0;
1438 info->mon.char_max = 0;
1439 info->mon.char_last = 0;
1443 static int set_threshold(struct cyclades_port *info, unsigned long __user * arg)
1445 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1446 unsigned long value;
1449 if (get_user(value, arg))
1452 channel = info->line;
1453 info->cor4 &= ~CyREC_FIFO;
1454 info->cor4 |= value & CyREC_FIFO;
1455 base_addr[CyCOR4] = info->cor4;
1460 get_threshold(struct cyclades_port *info, unsigned long __user * value)
1462 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1466 channel = info->line;
1468 tmp = base_addr[CyCOR4] & CyREC_FIFO;
1469 return put_user(tmp, value);
1473 set_default_threshold(struct cyclades_port *info, unsigned long __user * arg)
1475 unsigned long value;
1477 if (get_user(value, arg))
1480 info->default_threshold = value & 0x0f;
1485 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
1487 return put_user(info->default_threshold, value);
1490 static int set_timeout(struct cyclades_port *info, unsigned long __user * arg)
1492 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1494 unsigned long value;
1496 if (get_user(value, arg))
1499 channel = info->line;
1501 base_addr[CyRTPRL] = value & 0xff;
1502 base_addr[CyRTPRH] = (value >> 8) & 0xff;
1506 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
1508 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1512 channel = info->line;
1514 tmp = base_addr[CyRTPRL];
1515 return put_user(tmp, value);
1518 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
1520 info->default_timeout = value & 0xff;
1525 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
1527 return put_user(info->default_timeout, value);
1531 cy_ioctl(struct tty_struct *tty, struct file *file,
1532 unsigned int cmd, unsigned long arg)
1535 struct cyclades_port *info = tty->driver_data;
1537 void __user *argp = (void __user *)arg;
1539 #ifdef SERIAL_DEBUG_OTHER
1540 printk("cy_ioctl %s, cmd = %x arg = %lx\n", tty->name, cmd, arg); /* */
1547 ret_val = get_mon_info(info, argp);
1550 ret_val = get_threshold(info, argp);
1553 ret_val = set_threshold(info, argp);
1555 case CYGETDEFTHRESH:
1556 ret_val = get_default_threshold(info, argp);
1558 case CYSETDEFTHRESH:
1559 ret_val = set_default_threshold(info, argp);
1562 ret_val = get_timeout(info, argp);
1565 ret_val = set_timeout(info, argp);
1567 case CYGETDEFTIMEOUT:
1568 ret_val = get_default_timeout(info, argp);
1570 case CYSETDEFTIMEOUT:
1571 ret_val = set_default_timeout(info, (unsigned long)arg);
1573 case TCSBRK: /* SVID version: non-zero arg --> no break */
1574 ret_val = tty_check_change(tty);
1577 tty_wait_until_sent(tty, 0);
1579 send_break(info, HZ / 4); /* 1/4 second */
1581 case TCSBRKP: /* support for POSIX tcsendbreak() */
1582 ret_val = tty_check_change(tty);
1585 tty_wait_until_sent(tty, 0);
1586 send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1589 /* The following commands are incompletely implemented!!! */
1591 ret_val = get_serial_info(info, argp);
1594 ret_val = set_serial_info(info, argp);
1597 ret_val = -ENOIOCTLCMD;
1601 #ifdef SERIAL_DEBUG_OTHER
1602 printk("cy_ioctl done\n");
1608 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1610 struct cyclades_port *info = tty->driver_data;
1612 #ifdef SERIAL_DEBUG_OTHER
1613 printk("cy_set_termios %s\n", tty->name);
1616 if (tty->termios->c_cflag == old_termios->c_cflag)
1620 if ((old_termios->c_cflag & CRTSCTS) &&
1621 !(tty->termios->c_cflag & CRTSCTS)) {
1625 #ifdef tytso_patch_94Nov25_1726
1626 if (!(old_termios->c_cflag & CLOCAL) &&
1627 (tty->termios->c_cflag & CLOCAL))
1628 wake_up_interruptible(&info->open_wait);
1630 } /* cy_set_termios */
1632 static void cy_close(struct tty_struct *tty, struct file *filp)
1634 struct cyclades_port *info = tty->driver_data;
1637 #ifdef SERIAL_DEBUG_OTHER
1638 printk("cy_close %s\n", tty->name);
1641 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
1644 #ifdef SERIAL_DEBUG_OPEN
1645 printk("cy_close %s, count = %d\n", tty->name, info->count);
1648 if ((tty->count == 1) && (info->count != 1)) {
1650 * Uh, oh. tty->count is 1, which means that the tty
1651 * structure will be freed. Info->count should always
1652 * be one in these conditions. If it's greater than
1653 * one, we've got real problems, since it means the
1654 * serial port won't be shutdown.
1656 printk("cy_close: bad serial port count; tty->count is 1, "
1657 "info->count is %d\n", info->count);
1660 #ifdef SERIAL_DEBUG_COUNT
1661 printk("cyc: %d: decrementing count to %d\n", __LINE__,
1664 if (--info->count < 0) {
1665 printk("cy_close: bad serial port count for ttys%d: %d\n",
1666 info->line, info->count);
1667 #ifdef SERIAL_DEBUG_COUNT
1668 printk("cyc: %d: setting count to 0\n", __LINE__);
1674 info->flags |= ASYNC_CLOSING;
1675 if (info->flags & ASYNC_INITIALIZED)
1676 tty_wait_until_sent(tty, 3000); /* 30 seconds timeout */
1678 cy_flush_buffer(tty);
1679 tty_ldisc_flush(tty);
1681 if (info->blocked_open) {
1682 if (info->close_delay) {
1683 msleep_interruptible(jiffies_to_msecs
1684 (info->close_delay));
1686 wake_up_interruptible(&info->open_wait);
1688 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1689 wake_up_interruptible(&info->close_wait);
1691 #ifdef SERIAL_DEBUG_OTHER
1692 printk("cy_close done\n");
1697 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
1699 void cy_hangup(struct tty_struct *tty)
1701 struct cyclades_port *info = tty->driver_data;
1703 #ifdef SERIAL_DEBUG_OTHER
1704 printk("cy_hangup %s\n", tty->name); /* */
1707 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
1714 #ifdef SERIAL_DEBUG_COUNT
1715 printk("cyc: %d: setting count to 0\n", __LINE__);
1719 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1720 wake_up_interruptible(&info->open_wait);
1724 * ------------------------------------------------------------
1725 * cy_open() and friends
1726 * ------------------------------------------------------------
1730 block_til_ready(struct tty_struct *tty, struct file *filp,
1731 struct cyclades_port *info)
1733 DECLARE_WAITQUEUE(wait, current);
1734 unsigned long flags;
1737 volatile u_char *base_addr = (u_char *) BASE_ADDR;
1740 * If the device is in the middle of being closed, then block
1741 * until it's done, and then try again.
1743 if (info->flags & ASYNC_CLOSING) {
1744 interruptible_sleep_on(&info->close_wait);
1745 if (info->flags & ASYNC_HUP_NOTIFY) {
1748 return -ERESTARTSYS;
1753 * If non-blocking mode is set, then make the check up front
1756 if (filp->f_flags & O_NONBLOCK) {
1757 info->flags |= ASYNC_NORMAL_ACTIVE;
1762 * Block waiting for the carrier detect and the line to become
1763 * free (i.e., not in use by the callout). While we are in
1764 * this loop, info->count is dropped by one, so that
1765 * cy_close() knows when to free things. We restore it upon
1766 * exit, either normal or abnormal.
1769 add_wait_queue(&info->open_wait, &wait);
1770 #ifdef SERIAL_DEBUG_OPEN
1771 printk("block_til_ready before block: %s, count = %d\n",
1772 tty->name, info->count);
1776 #ifdef SERIAL_DEBUG_COUNT
1777 printk("cyc: %d: decrementing count to %d\n", __LINE__, info->count);
1779 info->blocked_open++;
1781 channel = info->line;
1784 local_irq_save(flags);
1785 base_addr[CyCAR] = (u_char) channel;
1786 base_addr[CyMSVR1] = CyRTS;
1787 /* CP('S');CP('4'); */
1788 base_addr[CyMSVR2] = CyDTR;
1789 #ifdef SERIAL_DEBUG_DTR
1790 printk("cyc: %d: raising DTR\n", __LINE__);
1791 printk(" status: 0x%x, 0x%x\n", base_addr[CyMSVR1],
1792 base_addr[CyMSVR2]);
1794 local_irq_restore(flags);
1795 set_current_state(TASK_INTERRUPTIBLE);
1796 if (tty_hung_up_p(filp)
1797 || !(info->flags & ASYNC_INITIALIZED)) {
1798 if (info->flags & ASYNC_HUP_NOTIFY) {
1801 retval = -ERESTARTSYS;
1805 local_irq_save(flags);
1806 base_addr[CyCAR] = (u_char) channel;
1807 /* CP('L');CP1(1 && C_CLOCAL(tty)); CP1(1 && (base_addr[CyMSVR1] & CyDCD) ); */
1808 if (!(info->flags & ASYNC_CLOSING)
1810 || (base_addr[CyMSVR1] & CyDCD))) {
1811 local_irq_restore(flags);
1814 local_irq_restore(flags);
1815 if (signal_pending(current)) {
1816 retval = -ERESTARTSYS;
1819 #ifdef SERIAL_DEBUG_OPEN
1820 printk("block_til_ready blocking: %s, count = %d\n",
1821 tty->name, info->count);
1826 __set_current_state(TASK_RUNNING);
1827 remove_wait_queue(&info->open_wait, &wait);
1828 if (!tty_hung_up_p(filp)) {
1830 #ifdef SERIAL_DEBUG_COUNT
1831 printk("cyc: %d: incrementing count to %d\n", __LINE__,
1835 info->blocked_open--;
1836 #ifdef SERIAL_DEBUG_OPEN
1837 printk("block_til_ready after blocking: %s, count = %d\n",
1838 tty->name, info->count);
1843 info->flags |= ASYNC_NORMAL_ACTIVE;
1845 } /* block_til_ready */
1848 * This routine is called whenever a serial port is opened. It
1849 * performs the serial-specific initialization for the tty structure.
1851 int cy_open(struct tty_struct *tty, struct file *filp)
1853 struct cyclades_port *info;
1858 if ((line < 0) || (NR_PORTS <= line)) {
1861 info = &cy_port[line];
1862 if (info->line < 0) {
1865 #ifdef SERIAL_DEBUG_OTHER
1866 printk("cy_open %s\n", tty->name); /* */
1868 if (serial_paranoia_check(info, tty->name, "cy_open")) {
1871 #ifdef SERIAL_DEBUG_OPEN
1872 printk("cy_open %s, count = %d\n", tty->name, info->count);
1876 #ifdef SERIAL_DEBUG_COUNT
1877 printk("cyc: %d: incrementing count to %d\n", __LINE__, info->count);
1879 tty->driver_data = info;
1883 * Start up serial port
1885 retval = startup(info);
1890 retval = block_til_ready(tty, filp, info);
1892 #ifdef SERIAL_DEBUG_OPEN
1893 printk("cy_open returning after block_til_ready with %d\n",
1898 #ifdef SERIAL_DEBUG_OPEN
1899 printk("cy_open done\n");
1906 * ---------------------------------------------------------------------
1907 * serial167_init() and friends
1909 * serial167_init() is called at boot-time to initialize the serial driver.
1910 * ---------------------------------------------------------------------
1914 * This routine prints out the appropriate serial driver version
1915 * number, and identifies which options were configured into this
1918 static void show_version(void)
1920 printk("MVME166/167 cd2401 driver\n");
1921 } /* show_version */
1923 /* initialize chips on card -- return number of valid
1924 chips (which is number of ports/4) */
1927 * This initialises the hardware to a reasonable state. It should
1928 * probe the chip first so as to copy 166-Bug setup as a default for
1929 * port 0. It initialises CMR to CyASYNC; that is never done again, so
1930 * as to limit the number of CyINIT_CHAN commands in normal running.
1932 * ... I wonder what I should do if this fails ...
1935 void mvme167_serial_console_setup(int cflag)
1937 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
1940 u_char rcor, rbpr, badspeed = 0;
1941 unsigned long flags;
1943 local_irq_save(flags);
1946 * First probe channel zero of the chip, to see what speed has
1950 base_addr[CyCAR] = 0;
1952 rcor = base_addr[CyRCOR] << 5;
1953 rbpr = base_addr[CyRBPR];
1955 for (spd = 0; spd < sizeof(baud_bpr); spd++)
1956 if (rbpr == baud_bpr[spd] && rcor == baud_co[spd])
1958 if (spd >= sizeof(baud_bpr)) {
1959 spd = 14; /* 19200 */
1960 badspeed = 1; /* Failed to identify speed */
1962 initial_console_speed = spd;
1964 /* OK, we have chosen a speed, now reset and reinitialise */
1966 my_udelay(20000L); /* Allow time for any active o/p to complete */
1967 if (base_addr[CyCCR] != 0x00) {
1968 local_irq_restore(flags);
1969 /* printk(" chip is never idle (CCR != 0)\n"); */
1973 base_addr[CyCCR] = CyCHIP_RESET; /* Reset the chip */
1976 if (base_addr[CyGFRCR] == 0x00) {
1977 local_irq_restore(flags);
1978 /* printk(" chip is not responding (GFRCR stayed 0)\n"); */
1983 * System clock is 20Mhz, divided by 2048, so divide by 10 for a 1.0ms
1987 base_addr[CyTPR] = 10;
1989 base_addr[CyPILR1] = 0x01; /* Interrupt level for modem change */
1990 base_addr[CyPILR2] = 0x02; /* Interrupt level for tx ints */
1991 base_addr[CyPILR3] = 0x03; /* Interrupt level for rx ints */
1994 * Attempt to set up all channels to something reasonable, and
1995 * bang out a INIT_CHAN command. We should then be able to limit
1996 * the ammount of fiddling we have to do in normal running.
1999 for (ch = 3; ch >= 0; ch--) {
2000 base_addr[CyCAR] = (u_char) ch;
2001 base_addr[CyIER] = 0;
2002 base_addr[CyCMR] = CyASYNC;
2003 base_addr[CyLICR] = (u_char) ch << 2;
2004 base_addr[CyLIVR] = 0x5c;
2005 base_addr[CyTCOR] = baud_co[spd];
2006 base_addr[CyTBPR] = baud_bpr[spd];
2007 base_addr[CyRCOR] = baud_co[spd] >> 5;
2008 base_addr[CyRBPR] = baud_bpr[spd];
2009 base_addr[CySCHR1] = 'Q' & 0x1f;
2010 base_addr[CySCHR2] = 'X' & 0x1f;
2011 base_addr[CySCRL] = 0;
2012 base_addr[CySCRH] = 0;
2013 base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE;
2014 base_addr[CyCOR2] = 0;
2015 base_addr[CyCOR3] = Cy_1_STOP;
2016 base_addr[CyCOR4] = baud_cor4[spd];
2017 base_addr[CyCOR5] = 0;
2018 base_addr[CyCOR6] = 0;
2019 base_addr[CyCOR7] = 0;
2020 base_addr[CyRTPRL] = 2;
2021 base_addr[CyRTPRH] = 0;
2022 base_addr[CyMSVR1] = 0;
2023 base_addr[CyMSVR2] = 0;
2024 write_cy_cmd(base_addr, CyINIT_CHAN | CyDIS_RCVR | CyDIS_XMTR);
2028 * Now do specials for channel zero....
2031 base_addr[CyMSVR1] = CyRTS;
2032 base_addr[CyMSVR2] = CyDTR;
2033 base_addr[CyIER] = CyRxData;
2034 write_cy_cmd(base_addr, CyENB_RCVR | CyENB_XMTR);
2036 local_irq_restore(flags);
2038 my_udelay(20000L); /* Let it all settle down */
2040 printk("CD2401 initialised, chip is rev 0x%02x\n", base_addr[CyGFRCR]);
2043 (" WARNING: Failed to identify line speed, rcor=%02x,rbpr=%02x\n",
2045 } /* serial_console_init */
2047 static const struct tty_operations cy_ops = {
2051 .put_char = cy_put_char,
2052 .flush_chars = cy_flush_chars,
2053 .write_room = cy_write_room,
2054 .chars_in_buffer = cy_chars_in_buffer,
2055 .flush_buffer = cy_flush_buffer,
2057 .throttle = cy_throttle,
2058 .unthrottle = cy_unthrottle,
2059 .set_termios = cy_set_termios,
2062 .hangup = cy_hangup,
2063 .tiocmget = cy_tiocmget,
2064 .tiocmset = cy_tiocmset,
2067 /* The serial driver boot-time initialization code!
2068 Hardware I/O ports are mapped to character special devices on a
2069 first found, first allocated manner. That is, this code searches
2070 for Cyclom cards in the system. As each is found, it is probed
2071 to discover how many chips (and thus how many ports) are present.
2072 These ports are mapped to the tty ports 64 and upward in monotonic
2073 fashion. If an 8-port card is replaced with a 16-port card, the
2074 port mapping on a following card will shift.
2076 This approach is different from what is used in the other serial
2077 device driver because the Cyclom is more properly a multiplexer,
2078 not just an aggregation of serial ports on one card.
2080 If there are more cards with more ports than have been statically
2081 allocated above, a warning is printed and the extra ports are ignored.
2083 static int __init serial167_init(void)
2085 struct cyclades_port *info;
2092 struct sigaction sa;
2095 if (!(mvme16x_config & MVME16x_CONFIG_GOT_CD2401))
2098 cy_serial_driver = alloc_tty_driver(NR_PORTS);
2099 if (!cy_serial_driver)
2108 /* Has "console=0,9600n8" been used in bootinfo to change speed? */
2109 if (serial_console_cflag)
2110 DefSpeed = serial_console_cflag & 0017;
2112 DefSpeed = initial_console_speed;
2113 serial_console_info = &cy_port[0];
2114 serial_console_cflag = DefSpeed | CS8;
2116 serial_console = 64; /*callout_driver.minor_start */
2120 /* Initialize the tty_driver structure */
2122 cy_serial_driver->owner = THIS_MODULE;
2123 cy_serial_driver->name = "ttyS";
2124 cy_serial_driver->major = TTY_MAJOR;
2125 cy_serial_driver->minor_start = 64;
2126 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
2127 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
2128 cy_serial_driver->init_termios = tty_std_termios;
2129 cy_serial_driver->init_termios.c_cflag =
2130 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2131 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
2132 tty_set_operations(cy_serial_driver, &cy_ops);
2134 ret = tty_register_driver(cy_serial_driver);
2136 printk(KERN_ERR "Couldn't register MVME166/7 serial driver\n");
2137 put_tty_driver(cy_serial_driver);
2143 for (index = 0; index < 1; index++) {
2147 if (port_num < NR_PORTS) {
2148 while (good_ports-- && port_num < NR_PORTS) {
2149 /*** initialize port ***/
2150 info->magic = CYCLADES_MAGIC;
2151 info->type = PORT_CIRRUS;
2153 info->line = port_num;
2154 info->flags = STD_COM_FLAGS;
2156 info->xmit_fifo_size = 12;
2157 info->cor1 = CyPARITY_NONE | Cy_8_BITS;
2159 info->cor3 = Cy_1_STOP;
2160 info->cor4 = 0x08; /* _very_ small receive threshold */
2164 info->tbpr = baud_bpr[DefSpeed]; /* Tx BPR */
2165 info->tco = baud_co[DefSpeed]; /* Tx CO */
2166 info->rbpr = baud_bpr[DefSpeed]; /* Rx BPR */
2167 info->rco = baud_co[DefSpeed] >> 5; /* Rx CO */
2168 info->close_delay = 0;
2171 #ifdef SERIAL_DEBUG_COUNT
2172 printk("cyc: %d: setting count to 0\n",
2175 info->blocked_open = 0;
2176 info->default_threshold = 0;
2177 info->default_timeout = 0;
2178 init_waitqueue_head(&info->open_wait);
2179 init_waitqueue_head(&info->close_wait);
2182 /*** !!!!!!!! this may expose new bugs !!!!!!!!! *********/
2183 info->read_status_mask =
2184 CyTIMEOUT | CySPECHAR | CyBREAK | CyPARITY |
2185 CyFRAME | CyOVERRUN;
2188 printk("ttyS%d ", info->line);
2191 if (!(port_num & 7)) {
2198 while (port_num < NR_PORTS) {
2203 #ifdef CONFIG_REMOTE_DEBUG
2206 ret = request_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt, 0,
2207 "cd2401_errors", cd2401_rxerr_interrupt);
2209 printk(KERN_ERR "Could't get cd2401_errors IRQ");
2210 goto cleanup_serial_driver;
2213 ret = request_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt, 0,
2214 "cd2401_modem", cd2401_modem_interrupt);
2216 printk(KERN_ERR "Could't get cd2401_modem IRQ");
2217 goto cleanup_irq_cd2401_errors;
2220 ret = request_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt, 0,
2221 "cd2401_txints", cd2401_tx_interrupt);
2223 printk(KERN_ERR "Could't get cd2401_txints IRQ");
2224 goto cleanup_irq_cd2401_modem;
2227 ret = request_irq(MVME167_IRQ_SER_RX, cd2401_rx_interrupt, 0,
2228 "cd2401_rxints", cd2401_rx_interrupt);
2230 printk(KERN_ERR "Could't get cd2401_rxints IRQ");
2231 goto cleanup_irq_cd2401_txints;
2234 /* Now we have registered the interrupt handlers, allow the interrupts */
2236 pcc2chip[PccSCCMICR] = 0x15; /* Serial ints are level 5 */
2237 pcc2chip[PccSCCTICR] = 0x15;
2238 pcc2chip[PccSCCRICR] = 0x15;
2240 pcc2chip[PccIMLR] = 3; /* Allow PCC2 ints above 3!? */
2243 cleanup_irq_cd2401_txints:
2244 free_irq(MVME167_IRQ_SER_TX, cd2401_tx_interrupt);
2245 cleanup_irq_cd2401_modem:
2246 free_irq(MVME167_IRQ_SER_MODEM, cd2401_modem_interrupt);
2247 cleanup_irq_cd2401_errors:
2248 free_irq(MVME167_IRQ_SER_ERR, cd2401_rxerr_interrupt);
2249 cleanup_serial_driver:
2250 if (tty_unregister_driver(cy_serial_driver))
2252 "Couldn't unregister MVME166/7 serial driver\n");
2253 put_tty_driver(cy_serial_driver);
2255 } /* serial167_init */
2257 module_init(serial167_init);
2259 #ifdef CYCLOM_SHOW_STATUS
2260 static void show_status(int line_num)
2262 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2264 struct cyclades_port *info;
2265 unsigned long flags;
2267 info = &cy_port[line_num];
2268 channel = info->line;
2269 printk(" channel %d\n", channel);
2270 /**/ printk(" cy_port\n");
2271 printk(" card line flags = %d %d %x\n",
2272 info->card, info->line, info->flags);
2274 (" *tty read_status_mask timeout xmit_fifo_size = %lx %x %x %x\n",
2275 (long)info->tty, info->read_status_mask, info->timeout,
2276 info->xmit_fifo_size);
2277 printk(" cor1,cor2,cor3,cor4,cor5,cor6,cor7 = %x %x %x %x %x %x %x\n",
2278 info->cor1, info->cor2, info->cor3, info->cor4, info->cor5,
2279 info->cor6, info->cor7);
2280 printk(" tbpr,tco,rbpr,rco = %d %d %d %d\n", info->tbpr, info->tco,
2281 info->rbpr, info->rco);
2282 printk(" close_delay event count = %d %d %d\n", info->close_delay,
2283 info->event, info->count);
2284 printk(" x_char blocked_open = %x %x\n", info->x_char,
2285 info->blocked_open);
2286 printk(" open_wait = %lx %lx %lx\n", (long)info->open_wait);
2288 local_irq_save(flags);
2290 /* Global Registers */
2292 printk(" CyGFRCR %x\n", base_addr[CyGFRCR]);
2293 printk(" CyCAR %x\n", base_addr[CyCAR]);
2294 printk(" CyRISR %x\n", base_addr[CyRISR]);
2295 printk(" CyTISR %x\n", base_addr[CyTISR]);
2296 printk(" CyMISR %x\n", base_addr[CyMISR]);
2297 printk(" CyRIR %x\n", base_addr[CyRIR]);
2298 printk(" CyTIR %x\n", base_addr[CyTIR]);
2299 printk(" CyMIR %x\n", base_addr[CyMIR]);
2300 printk(" CyTPR %x\n", base_addr[CyTPR]);
2302 base_addr[CyCAR] = (u_char) channel;
2304 /* Virtual Registers */
2307 printk(" CyRIVR %x\n", base_addr[CyRIVR]);
2308 printk(" CyTIVR %x\n", base_addr[CyTIVR]);
2309 printk(" CyMIVR %x\n", base_addr[CyMIVR]);
2310 printk(" CyMISR %x\n", base_addr[CyMISR]);
2313 /* Channel Registers */
2315 printk(" CyCCR %x\n", base_addr[CyCCR]);
2316 printk(" CyIER %x\n", base_addr[CyIER]);
2317 printk(" CyCOR1 %x\n", base_addr[CyCOR1]);
2318 printk(" CyCOR2 %x\n", base_addr[CyCOR2]);
2319 printk(" CyCOR3 %x\n", base_addr[CyCOR3]);
2320 printk(" CyCOR4 %x\n", base_addr[CyCOR4]);
2321 printk(" CyCOR5 %x\n", base_addr[CyCOR5]);
2323 printk(" CyCCSR %x\n", base_addr[CyCCSR]);
2324 printk(" CyRDCR %x\n", base_addr[CyRDCR]);
2326 printk(" CySCHR1 %x\n", base_addr[CySCHR1]);
2327 printk(" CySCHR2 %x\n", base_addr[CySCHR2]);
2329 printk(" CySCHR3 %x\n", base_addr[CySCHR3]);
2330 printk(" CySCHR4 %x\n", base_addr[CySCHR4]);
2331 printk(" CySCRL %x\n", base_addr[CySCRL]);
2332 printk(" CySCRH %x\n", base_addr[CySCRH]);
2333 printk(" CyLNC %x\n", base_addr[CyLNC]);
2334 printk(" CyMCOR1 %x\n", base_addr[CyMCOR1]);
2335 printk(" CyMCOR2 %x\n", base_addr[CyMCOR2]);
2337 printk(" CyRTPRL %x\n", base_addr[CyRTPRL]);
2338 printk(" CyRTPRH %x\n", base_addr[CyRTPRH]);
2339 printk(" CyMSVR1 %x\n", base_addr[CyMSVR1]);
2340 printk(" CyMSVR2 %x\n", base_addr[CyMSVR2]);
2341 printk(" CyRBPR %x\n", base_addr[CyRBPR]);
2342 printk(" CyRCOR %x\n", base_addr[CyRCOR]);
2343 printk(" CyTBPR %x\n", base_addr[CyTBPR]);
2344 printk(" CyTCOR %x\n", base_addr[CyTCOR]);
2346 local_irq_restore(flags);
2351 /* Dummy routine in mvme16x/config.c for now */
2353 /* Serial console setup. Called from linux/init/main.c */
2355 void console_setup(char *str, int *ints)
2358 int baud, bits, parity;
2362 if (ints[0] > 3 || ints[1] > 3)
2365 /* Get baud, bits and parity */
2371 if ((s = strchr(str, ','))) {
2374 } while (*s >= '0' && *s <= '9');
2381 /* Now construct a cflag setting. */
2420 serial_console_info = &cy_port[ints[1]];
2421 serial_console_cflag = cflag;
2422 serial_console = ints[1] + 64; /*callout_driver.minor_start */
2427 * The following is probably out of date for 2.1.x serial console stuff.
2429 * The console is registered early on from arch/m68k/kernel/setup.c, and
2430 * it therefore relies on the chip being setup correctly by 166-Bug. This
2431 * seems reasonable, as the serial port has been used to invoke the system
2432 * boot. It also means that this function must not rely on any data
2433 * initialisation performed by serial167_init() etc.
2435 * Of course, once the console has been registered, we had better ensure
2436 * that serial167_init() doesn't leave the chip non-functional.
2438 * The console must be locked when we get here.
2441 void serial167_console_write(struct console *co, const char *str,
2444 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2445 unsigned long flags;
2446 volatile u_char sink;
2452 local_irq_save(flags);
2454 /* Ensure transmitter is enabled! */
2457 base_addr[CyCAR] = (u_char) port;
2458 while (base_addr[CyCCR])
2460 base_addr[CyCCR] = CyENB_XMTR;
2462 ier = base_addr[CyIER];
2463 base_addr[CyIER] = CyTxMpty;
2466 if (pcc2chip[PccSCCTICR] & 0x20) {
2467 /* We have a Tx int. Acknowledge it */
2468 sink = pcc2chip[PccTPIACKR];
2469 if ((base_addr[CyLICR] >> 2) == port) {
2471 /* Last char of string is now output */
2472 base_addr[CyTEOIR] = CyNOTRANS;
2476 base_addr[CyTDR] = '\n';
2480 } else if (*str == '\n') {
2481 base_addr[CyTDR] = '\r';
2484 base_addr[CyTDR] = *str++;
2487 base_addr[CyTEOIR] = 0;
2489 base_addr[CyTEOIR] = CyNOTRANS;
2493 base_addr[CyIER] = ier;
2495 local_irq_restore(flags);
2498 static struct tty_driver *serial167_console_device(struct console *c,
2502 return cy_serial_driver;
2505 static struct console sercons = {
2507 .write = serial167_console_write,
2508 .device = serial167_console_device,
2509 .flags = CON_PRINTBUFFER,
2513 static int __init serial167_console_init(void)
2515 if (vme_brdtype == VME_TYPE_MVME166 ||
2516 vme_brdtype == VME_TYPE_MVME167 ||
2517 vme_brdtype == VME_TYPE_MVME177) {
2518 mvme167_serial_console_setup(0);
2519 register_console(&sercons);
2524 console_initcall(serial167_console_init);
2526 #ifdef CONFIG_REMOTE_DEBUG
2527 void putDebugChar(int c)
2529 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2530 unsigned long flags;
2531 volatile u_char sink;
2535 local_irq_save(flags);
2537 /* Ensure transmitter is enabled! */
2540 base_addr[CyCAR] = (u_char) port;
2541 while (base_addr[CyCCR])
2543 base_addr[CyCCR] = CyENB_XMTR;
2545 ier = base_addr[CyIER];
2546 base_addr[CyIER] = CyTxMpty;
2549 if (pcc2chip[PccSCCTICR] & 0x20) {
2550 /* We have a Tx int. Acknowledge it */
2551 sink = pcc2chip[PccTPIACKR];
2552 if ((base_addr[CyLICR] >> 2) == port) {
2553 base_addr[CyTDR] = c;
2554 base_addr[CyTEOIR] = 0;
2557 base_addr[CyTEOIR] = CyNOTRANS;
2561 base_addr[CyIER] = ier;
2563 local_irq_restore(flags);
2568 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2569 unsigned long flags;
2570 volatile u_char sink;
2576 if (i != debugiq.in) {
2578 if (++i == DEBUG_LEN)
2583 /* OK, nothing in queue, wait in poll loop */
2585 local_irq_save(flags);
2587 /* Ensure receiver is enabled! */
2590 base_addr[CyCAR] = (u_char) port;
2592 while (base_addr[CyCCR])
2594 base_addr[CyCCR] = CyENB_RCVR;
2596 ier = base_addr[CyIER];
2597 base_addr[CyIER] = CyRxData;
2600 if (pcc2chip[PccSCCRICR] & 0x20) {
2601 /* We have a Rx int. Acknowledge it */
2602 sink = pcc2chip[PccRPIACKR];
2603 if ((base_addr[CyLICR] >> 2) == port) {
2604 int cnt = base_addr[CyRFOC];
2606 c = base_addr[CyRDR];
2609 ("!! debug char is null (cnt=%d) !!",
2614 base_addr[CyREOIR] = 0;
2616 if (i == debugiq.in)
2617 panic("Debug input queue empty!");
2619 if (++i == DEBUG_LEN)
2624 base_addr[CyREOIR] = CyNOTRANS;
2628 base_addr[CyIER] = ier;
2630 local_irq_restore(flags);
2635 void queueDebugChar(int c)
2641 if (++i == DEBUG_LEN)
2643 if (i != debugiq.out)
2647 static void debug_setup()
2649 unsigned long flags;
2650 volatile unsigned char *base_addr = (u_char *) BASE_ADDR;
2655 local_irq_save(flags);
2657 for (i = 0; i < 4; i++) {
2658 base_addr[CyCAR] = i;
2659 base_addr[CyLICR] = i << 2;
2662 debugiq.in = debugiq.out = 0;
2664 base_addr[CyCAR] = DEBUG_PORT;
2669 base_addr[CyIER] = 0;
2671 base_addr[CyCMR] = CyASYNC;
2672 base_addr[CyLICR] = DEBUG_PORT << 2;
2673 base_addr[CyLIVR] = 0x5c;
2675 /* tx and rx baud rate */
2677 base_addr[CyTCOR] = baud_co[i];
2678 base_addr[CyTBPR] = baud_bpr[i];
2679 base_addr[CyRCOR] = baud_co[i] >> 5;
2680 base_addr[CyRBPR] = baud_bpr[i];
2682 /* set line characteristics according configuration */
2684 base_addr[CySCHR1] = 0;
2685 base_addr[CySCHR2] = 0;
2686 base_addr[CySCRL] = 0;
2687 base_addr[CySCRH] = 0;
2688 base_addr[CyCOR1] = Cy_8_BITS | CyPARITY_NONE;
2689 base_addr[CyCOR2] = 0;
2690 base_addr[CyCOR3] = Cy_1_STOP;
2691 base_addr[CyCOR4] = baud_cor4[i];
2692 base_addr[CyCOR5] = 0;
2693 base_addr[CyCOR6] = 0;
2694 base_addr[CyCOR7] = 0;
2696 write_cy_cmd(base_addr, CyINIT_CHAN);
2697 write_cy_cmd(base_addr, CyENB_RCVR);
2699 base_addr[CyCAR] = DEBUG_PORT; /* !!! Is this needed? */
2701 base_addr[CyRTPRL] = 2;
2702 base_addr[CyRTPRH] = 0;
2704 base_addr[CyMSVR1] = CyRTS;
2705 base_addr[CyMSVR2] = CyDTR;
2707 base_addr[CyIER] = CyRxData;
2709 local_irq_restore(flags);
2715 MODULE_LICENSE("GPL");