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17#include <asm/dbg.h>
18#include <linux/module.h>
19#include <linux/errno.h>
20#include <linux/serial.h>
21#include <linux/signal.h>
22#include <linux/sched.h>
23#include <linux/timer.h>
24#include <linux/interrupt.h>
25#include <linux/tty.h>
26#include <linux/tty_flip.h>
27#include <linux/major.h>
28#include <linux/string.h>
29#include <linux/fcntl.h>
30#include <linux/mm.h>
31#include <linux/kernel.h>
32#include <linux/console.h>
33#include <linux/reboot.h>
34#include <linux/keyboard.h>
35#include <linux/init.h>
36#include <linux/pm.h>
37#include <linux/bitops.h>
38#include <linux/delay.h>
39#include <linux/gfp.h>
40
41#include <asm/io.h>
42#include <asm/irq.h>
43#include <asm/delay.h>
44#include <asm/uaccess.h>
45
46
47
48
49
50#if defined(CONFIG_M68EZ328)
51#include <asm/MC68EZ328.h>
52#else
53#if defined(CONFIG_M68VZ328)
54#include <asm/MC68VZ328.h>
55#else
56#include <asm/MC68328.h>
57#endif
58#endif
59
60
61#ifdef CONFIG_XCOPILOT_BUGS
62#undef USE_INTS
63#else
64#define USE_INTS
65#endif
66
67
68
69
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71
72
73
74
75#define USTCNT_TX_INTR_MASK (USTCNT_TXEE)
76
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96
97#if defined(CONFIG_M68EZ328) || defined(CONFIG_M68VZ328)
98#define USTCNT_RX_INTR_MASK (USTCNT_RXHE | USTCNT_ODEN)
99#elif defined(CONFIG_M68328)
100#define USTCNT_RX_INTR_MASK (USTCNT_RXRE)
101#else
102#error Please, define the Rx interrupt events for your CPU
103#endif
104
105
106
107
108
109struct m68k_serial {
110 struct tty_port tport;
111 char is_cons;
112 int magic;
113 int baud_base;
114 int port;
115 int irq;
116 int type;
117 int custom_divisor;
118 int x_char;
119 int line;
120 unsigned char *xmit_buf;
121 int xmit_head;
122 int xmit_tail;
123 int xmit_cnt;
124};
125
126#define SERIAL_MAGIC 0x5301
127
128
129
130
131#define NR_PORTS 1
132
133static struct m68k_serial m68k_soft[NR_PORTS];
134
135static unsigned int uart_irqs[NR_PORTS] = { UART_IRQ_NUM };
136
137
138m68328_uart *uart_addr = (m68328_uart *)USTCNT_ADDR;
139
140struct tty_driver *serial_driver;
141
142static void change_speed(struct m68k_serial *info, struct tty_struct *tty);
143
144
145
146
147
148
149#ifdef CONFIG_M68VZ328
150#define CONSOLE_BAUD_RATE 19200
151#define DEFAULT_CBAUD B19200
152#endif
153
154
155#ifndef CONSOLE_BAUD_RATE
156#define CONSOLE_BAUD_RATE 9600
157#define DEFAULT_CBAUD B9600
158#endif
159
160
161static int m68328_console_initted = 0;
162static int m68328_console_baud = CONSOLE_BAUD_RATE;
163static int m68328_console_cbaud = DEFAULT_CBAUD;
164
165
166static inline int serial_paranoia_check(struct m68k_serial *info,
167 char *name, const char *routine)
168{
169#ifdef SERIAL_PARANOIA_CHECK
170 static const char *badmagic =
171 "Warning: bad magic number for serial struct %s in %s\n";
172 static const char *badinfo =
173 "Warning: null m68k_serial for %s in %s\n";
174
175 if (!info) {
176 printk(badinfo, name, routine);
177 return 1;
178 }
179 if (info->magic != SERIAL_MAGIC) {
180 printk(badmagic, name, routine);
181 return 1;
182 }
183#endif
184 return 0;
185}
186
187
188
189
190static int baud_table[] = {
191 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
192 9600, 19200, 38400, 57600, 115200, 0 };
193
194
195static inline int get_baud(struct m68k_serial *ss)
196{
197 unsigned long result = 115200;
198 unsigned short int baud = uart_addr[ss->line].ubaud;
199 if (GET_FIELD(baud, UBAUD_PRESCALER) == 0x38) result = 38400;
200 result >>= GET_FIELD(baud, UBAUD_DIVIDE);
201
202 return result;
203}
204
205
206
207
208
209
210
211
212
213static void rs_stop(struct tty_struct *tty)
214{
215 struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
216 m68328_uart *uart = &uart_addr[info->line];
217 unsigned long flags;
218
219 if (serial_paranoia_check(info, tty->name, "rs_stop"))
220 return;
221
222 local_irq_save(flags);
223 uart->ustcnt &= ~USTCNT_TXEN;
224 local_irq_restore(flags);
225}
226
227static int rs_put_char(char ch)
228{
229 unsigned long flags;
230 int loops = 0;
231
232 local_irq_save(flags);
233
234 while (!(UTX & UTX_TX_AVAIL) && (loops < 1000)) {
235 loops++;
236 udelay(5);
237 }
238
239 UTX_TXDATA = ch;
240 udelay(5);
241 local_irq_restore(flags);
242 return 1;
243}
244
245static void rs_start(struct tty_struct *tty)
246{
247 struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
248 m68328_uart *uart = &uart_addr[info->line];
249 unsigned long flags;
250
251 if (serial_paranoia_check(info, tty->name, "rs_start"))
252 return;
253
254 local_irq_save(flags);
255 if (info->xmit_cnt && info->xmit_buf && !(uart->ustcnt & USTCNT_TXEN)) {
256#ifdef USE_INTS
257 uart->ustcnt |= USTCNT_TXEN | USTCNT_TX_INTR_MASK;
258#else
259 uart->ustcnt |= USTCNT_TXEN;
260#endif
261 }
262 local_irq_restore(flags);
263}
264
265static void receive_chars(struct m68k_serial *info, unsigned short rx)
266{
267 m68328_uart *uart = &uart_addr[info->line];
268 unsigned char ch, flag;
269
270
271
272
273#ifndef CONFIG_XCOPILOT_BUGS
274 do {
275#endif
276 ch = GET_FIELD(rx, URX_RXDATA);
277
278 if(info->is_cons) {
279 if(URX_BREAK & rx) {
280 return;
281#ifdef CONFIG_MAGIC_SYSRQ
282 } else if (ch == 0x10) {
283 show_state();
284 show_free_areas(0);
285 show_buffers();
286
287 return;
288 } else if (ch == 0x12) {
289 emergency_restart();
290 return;
291#endif
292 }
293 }
294
295 flag = TTY_NORMAL;
296
297 if (rx & URX_PARITY_ERROR)
298 flag = TTY_PARITY;
299 else if (rx & URX_OVRUN)
300 flag = TTY_OVERRUN;
301 else if (rx & URX_FRAME_ERROR)
302 flag = TTY_FRAME;
303
304 tty_insert_flip_char(&info->tport, ch, flag);
305#ifndef CONFIG_XCOPILOT_BUGS
306 } while((rx = uart->urx.w) & URX_DATA_READY);
307#endif
308
309 tty_schedule_flip(&info->tport);
310}
311
312static void transmit_chars(struct m68k_serial *info, struct tty_struct *tty)
313{
314 m68328_uart *uart = &uart_addr[info->line];
315
316 if (info->x_char) {
317
318 uart->utx.b.txdata = info->x_char;
319 info->x_char = 0;
320 goto clear_and_return;
321 }
322
323 if ((info->xmit_cnt <= 0) || !tty || tty->stopped) {
324
325 uart->ustcnt &= ~USTCNT_TX_INTR_MASK;
326 goto clear_and_return;
327 }
328
329
330 uart->utx.b.txdata = info->xmit_buf[info->xmit_tail++];
331 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
332 info->xmit_cnt--;
333
334 if(info->xmit_cnt <= 0) {
335
336 uart->ustcnt &= ~USTCNT_TX_INTR_MASK;
337 goto clear_and_return;
338 }
339
340clear_and_return:
341
342 return;
343}
344
345
346
347
348irqreturn_t rs_interrupt(int irq, void *dev_id)
349{
350 struct m68k_serial *info = dev_id;
351 struct tty_struct *tty = tty_port_tty_get(&info->tport);
352 m68328_uart *uart;
353 unsigned short rx;
354 unsigned short tx;
355
356 uart = &uart_addr[info->line];
357 rx = uart->urx.w;
358
359#ifdef USE_INTS
360 tx = uart->utx.w;
361
362 if (rx & URX_DATA_READY)
363 receive_chars(info, rx);
364 if (tx & UTX_TX_AVAIL)
365 transmit_chars(info, tty);
366#else
367 receive_chars(info, rx);
368#endif
369 tty_kref_put(tty);
370
371 return IRQ_HANDLED;
372}
373
374static int startup(struct m68k_serial *info, struct tty_struct *tty)
375{
376 m68328_uart *uart = &uart_addr[info->line];
377 unsigned long flags;
378
379 if (info->tport.flags & ASYNC_INITIALIZED)
380 return 0;
381
382 if (!info->xmit_buf) {
383 info->xmit_buf = (unsigned char *) __get_free_page(GFP_KERNEL);
384 if (!info->xmit_buf)
385 return -ENOMEM;
386 }
387
388 local_irq_save(flags);
389
390
391
392
393
394
395 uart->ustcnt = USTCNT_UEN;
396 uart->ustcnt = USTCNT_UEN | USTCNT_RXEN | USTCNT_TXEN;
397 (void)uart->urx.w;
398
399
400
401
402#ifdef USE_INTS
403 uart->ustcnt = USTCNT_UEN | USTCNT_RXEN |
404 USTCNT_RX_INTR_MASK | USTCNT_TX_INTR_MASK;
405#else
406 uart->ustcnt = USTCNT_UEN | USTCNT_RXEN | USTCNT_RX_INTR_MASK;
407#endif
408
409 if (tty)
410 clear_bit(TTY_IO_ERROR, &tty->flags);
411 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
412
413
414
415
416
417 change_speed(info, tty);
418
419 info->tport.flags |= ASYNC_INITIALIZED;
420 local_irq_restore(flags);
421 return 0;
422}
423
424
425
426
427
428static void shutdown(struct m68k_serial *info, struct tty_struct *tty)
429{
430 m68328_uart *uart = &uart_addr[info->line];
431 unsigned long flags;
432
433 uart->ustcnt = 0;
434 if (!(info->tport.flags & ASYNC_INITIALIZED))
435 return;
436
437 local_irq_save(flags);
438
439 if (info->xmit_buf) {
440 free_page((unsigned long) info->xmit_buf);
441 info->xmit_buf = 0;
442 }
443
444 if (tty)
445 set_bit(TTY_IO_ERROR, &tty->flags);
446
447 info->tport.flags &= ~ASYNC_INITIALIZED;
448 local_irq_restore(flags);
449}
450
451struct {
452 int divisor, prescale;
453}
454#ifndef CONFIG_M68VZ328
455 hw_baud_table[18] = {
456 {0,0},
457 {0,0},
458 {0,0},
459 {0,0},
460 {0,0},
461 {0,0},
462 {0,0},
463 {7,0x26},
464 {6,0x26},
465 {5,0x26},
466 {0,0},
467 {4,0x26},
468 {3,0x26},
469 {2,0x26},
470 {1,0x26},
471 {0,0x26},
472 {1,0x38},
473 {0,0x38},
474};
475#else
476 hw_baud_table[18] = {
477 {0,0},
478 {0,0},
479 {0,0},
480 {0,0},
481 {0,0},
482 {0,0},
483 {0,0},
484 {0,0},
485 {7,0x26},
486 {6,0x26},
487 {0,0},
488 {5,0x26},
489 {4,0x26},
490 {3,0x26},
491 {2,0x26},
492 {1,0x26},
493 {0,0x26},
494 {1,0x38},
495};
496#endif
497
498
499
500
501
502
503static void change_speed(struct m68k_serial *info, struct tty_struct *tty)
504{
505 m68328_uart *uart = &uart_addr[info->line];
506 unsigned short port;
507 unsigned short ustcnt;
508 unsigned cflag;
509 int i;
510
511 cflag = tty->termios.c_cflag;
512 if (!(port = info->port))
513 return;
514
515 ustcnt = uart->ustcnt;
516 uart->ustcnt = ustcnt & ~USTCNT_TXEN;
517
518 i = cflag & CBAUD;
519 if (i & CBAUDEX) {
520 i = (i & ~CBAUDEX) + B38400;
521 }
522
523 uart->ubaud = PUT_FIELD(UBAUD_DIVIDE, hw_baud_table[i].divisor) |
524 PUT_FIELD(UBAUD_PRESCALER, hw_baud_table[i].prescale);
525
526 ustcnt &= ~(USTCNT_PARITYEN | USTCNT_ODD_EVEN | USTCNT_STOP | USTCNT_8_7);
527
528 if ((cflag & CSIZE) == CS8)
529 ustcnt |= USTCNT_8_7;
530
531 if (cflag & CSTOPB)
532 ustcnt |= USTCNT_STOP;
533
534 if (cflag & PARENB)
535 ustcnt |= USTCNT_PARITYEN;
536 if (cflag & PARODD)
537 ustcnt |= USTCNT_ODD_EVEN;
538
539#ifdef CONFIG_SERIAL_68328_RTS_CTS
540 if (cflag & CRTSCTS) {
541 uart->utx.w &= ~ UTX_NOCTS;
542 } else {
543 uart->utx.w |= UTX_NOCTS;
544 }
545#endif
546
547 ustcnt |= USTCNT_TXEN;
548
549 uart->ustcnt = ustcnt;
550 return;
551}
552
553
554
555
556static void rs_fair_output(void)
557{
558 int left;
559 unsigned long flags;
560 struct m68k_serial *info = &m68k_soft[0];
561 char c;
562
563 if (info == 0) return;
564 if (info->xmit_buf == 0) return;
565
566 local_irq_save(flags);
567 left = info->xmit_cnt;
568 while (left != 0) {
569 c = info->xmit_buf[info->xmit_tail];
570 info->xmit_tail = (info->xmit_tail+1) & (SERIAL_XMIT_SIZE-1);
571 info->xmit_cnt--;
572 local_irq_restore(flags);
573
574 rs_put_char(c);
575
576 local_irq_save(flags);
577 left = min(info->xmit_cnt, left-1);
578 }
579
580
581 udelay(5);
582
583 local_irq_restore(flags);
584 return;
585}
586
587
588
589
590void console_print_68328(const char *p)
591{
592 char c;
593
594 while((c=*(p++)) != 0) {
595 if(c == '\n')
596 rs_put_char('\r');
597 rs_put_char(c);
598 }
599
600
601 rs_fair_output();
602
603 return;
604}
605
606static void rs_set_ldisc(struct tty_struct *tty)
607{
608 struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
609
610 if (serial_paranoia_check(info, tty->name, "rs_set_ldisc"))
611 return;
612
613 info->is_cons = (tty->termios.c_line == N_TTY);
614
615 printk("ttyS%d console mode %s\n", info->line, info->is_cons ? "on" : "off");
616}
617
618static void rs_flush_chars(struct tty_struct *tty)
619{
620 struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
621 m68328_uart *uart = &uart_addr[info->line];
622 unsigned long flags;
623
624 if (serial_paranoia_check(info, tty->name, "rs_flush_chars"))
625 return;
626#ifndef USE_INTS
627 for(;;) {
628#endif
629
630
631 local_irq_save(flags);
632
633 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
634 !info->xmit_buf) {
635 local_irq_restore(flags);
636 return;
637 }
638
639#ifdef USE_INTS
640 uart->ustcnt |= USTCNT_TXEN | USTCNT_TX_INTR_MASK;
641#else
642 uart->ustcnt |= USTCNT_TXEN;
643#endif
644
645#ifdef USE_INTS
646 if (uart->utx.w & UTX_TX_AVAIL) {
647#else
648 if (1) {
649#endif
650
651 uart->utx.b.txdata = info->xmit_buf[info->xmit_tail++];
652 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
653 info->xmit_cnt--;
654 }
655
656#ifndef USE_INTS
657 while (!(uart->utx.w & UTX_TX_AVAIL)) udelay(5);
658 }
659#endif
660 local_irq_restore(flags);
661}
662
663extern void console_printn(const char * b, int count);
664
665static int rs_write(struct tty_struct * tty,
666 const unsigned char *buf, int count)
667{
668 int c, total = 0;
669 struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
670 m68328_uart *uart = &uart_addr[info->line];
671 unsigned long flags;
672
673 if (serial_paranoia_check(info, tty->name, "rs_write"))
674 return 0;
675
676 if (!tty || !info->xmit_buf)
677 return 0;
678
679 local_save_flags(flags);
680 while (1) {
681 local_irq_disable();
682 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
683 SERIAL_XMIT_SIZE - info->xmit_head));
684 local_irq_restore(flags);
685
686 if (c <= 0)
687 break;
688
689 memcpy(info->xmit_buf + info->xmit_head, buf, c);
690
691 local_irq_disable();
692 info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
693 info->xmit_cnt += c;
694 local_irq_restore(flags);
695 buf += c;
696 count -= c;
697 total += c;
698 }
699
700 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
701
702 local_irq_disable();
703#ifndef USE_INTS
704 while(info->xmit_cnt) {
705#endif
706
707 uart->ustcnt |= USTCNT_TXEN;
708#ifdef USE_INTS
709 uart->ustcnt |= USTCNT_TX_INTR_MASK;
710#else
711 while (!(uart->utx.w & UTX_TX_AVAIL)) udelay(5);
712#endif
713 if (uart->utx.w & UTX_TX_AVAIL) {
714 uart->utx.b.txdata = info->xmit_buf[info->xmit_tail++];
715 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE-1);
716 info->xmit_cnt--;
717 }
718
719#ifndef USE_INTS
720 }
721#endif
722 local_irq_restore(flags);
723 }
724
725 return total;
726}
727
728static int rs_write_room(struct tty_struct *tty)
729{
730 struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
731 int ret;
732
733 if (serial_paranoia_check(info, tty->name, "rs_write_room"))
734 return 0;
735 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
736 if (ret < 0)
737 ret = 0;
738 return ret;
739}
740
741static int rs_chars_in_buffer(struct tty_struct *tty)
742{
743 struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
744
745 if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
746 return 0;
747 return info->xmit_cnt;
748}
749
750static void rs_flush_buffer(struct tty_struct *tty)
751{
752 struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
753 unsigned long flags;
754
755 if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
756 return;
757 local_irq_save(flags);
758 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
759 local_irq_restore(flags);
760 tty_wakeup(tty);
761}
762
763
764
765
766
767
768
769
770
771static void rs_throttle(struct tty_struct * tty)
772{
773 struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
774
775 if (serial_paranoia_check(info, tty->name, "rs_throttle"))
776 return;
777
778 if (I_IXOFF(tty))
779 info->x_char = STOP_CHAR(tty);
780
781
782}
783
784static void rs_unthrottle(struct tty_struct * tty)
785{
786 struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
787
788 if (serial_paranoia_check(info, tty->name, "rs_unthrottle"))
789 return;
790
791 if (I_IXOFF(tty)) {
792 if (info->x_char)
793 info->x_char = 0;
794 else
795 info->x_char = START_CHAR(tty);
796 }
797
798
799}
800
801
802
803
804
805
806
807static int get_serial_info(struct m68k_serial * info,
808 struct serial_struct * retinfo)
809{
810 struct serial_struct tmp;
811
812 if (!retinfo)
813 return -EFAULT;
814 memset(&tmp, 0, sizeof(tmp));
815 tmp.type = info->type;
816 tmp.line = info->line;
817 tmp.port = info->port;
818 tmp.irq = info->irq;
819 tmp.flags = info->tport.flags;
820 tmp.baud_base = info->baud_base;
821 tmp.close_delay = info->tport.close_delay;
822 tmp.closing_wait = info->tport.closing_wait;
823 tmp.custom_divisor = info->custom_divisor;
824 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
825 return -EFAULT;
826
827 return 0;
828}
829
830static int set_serial_info(struct m68k_serial *info, struct tty_struct *tty,
831 struct serial_struct * new_info)
832{
833 struct tty_port *port = &info->tport;
834 struct serial_struct new_serial;
835 struct m68k_serial old_info;
836 int retval = 0;
837
838 if (!new_info)
839 return -EFAULT;
840 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
841 return -EFAULT;
842 old_info = *info;
843
844 if (!capable(CAP_SYS_ADMIN)) {
845 if ((new_serial.baud_base != info->baud_base) ||
846 (new_serial.type != info->type) ||
847 (new_serial.close_delay != port->close_delay) ||
848 ((new_serial.flags & ~ASYNC_USR_MASK) !=
849 (port->flags & ~ASYNC_USR_MASK)))
850 return -EPERM;
851 port->flags = ((port->flags & ~ASYNC_USR_MASK) |
852 (new_serial.flags & ASYNC_USR_MASK));
853 info->custom_divisor = new_serial.custom_divisor;
854 goto check_and_exit;
855 }
856
857 if (port->count > 1)
858 return -EBUSY;
859
860
861
862
863
864
865 info->baud_base = new_serial.baud_base;
866 port->flags = ((port->flags & ~ASYNC_FLAGS) |
867 (new_serial.flags & ASYNC_FLAGS));
868 info->type = new_serial.type;
869 port->close_delay = new_serial.close_delay;
870 port->closing_wait = new_serial.closing_wait;
871
872check_and_exit:
873 retval = startup(info, tty);
874 return retval;
875}
876
877
878
879
880
881
882
883
884
885
886
887static int get_lsr_info(struct m68k_serial * info, unsigned int *value)
888{
889#ifdef CONFIG_SERIAL_68328_RTS_CTS
890 m68328_uart *uart = &uart_addr[info->line];
891#endif
892 unsigned char status;
893 unsigned long flags;
894
895 local_irq_save(flags);
896#ifdef CONFIG_SERIAL_68328_RTS_CTS
897 status = (uart->utx.w & UTX_CTS_STAT) ? 1 : 0;
898#else
899 status = 0;
900#endif
901 local_irq_restore(flags);
902 return put_user(status, value);
903}
904
905
906
907
908static void send_break(struct m68k_serial * info, unsigned int duration)
909{
910 m68328_uart *uart = &uart_addr[info->line];
911 unsigned long flags;
912 if (!info->port)
913 return;
914 local_irq_save(flags);
915#ifdef USE_INTS
916 uart->utx.w |= UTX_SEND_BREAK;
917 msleep_interruptible(duration);
918 uart->utx.w &= ~UTX_SEND_BREAK;
919#endif
920 local_irq_restore(flags);
921}
922
923static int rs_ioctl(struct tty_struct *tty,
924 unsigned int cmd, unsigned long arg)
925{
926 struct m68k_serial * info = (struct m68k_serial *)tty->driver_data;
927 int retval;
928
929 if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
930 return -ENODEV;
931
932 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
933 (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD) &&
934 (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT)) {
935 if (tty->flags & (1 << TTY_IO_ERROR))
936 return -EIO;
937 }
938
939 switch (cmd) {
940 case TCSBRK:
941 retval = tty_check_change(tty);
942 if (retval)
943 return retval;
944 tty_wait_until_sent(tty, 0);
945 if (!arg)
946 send_break(info, 250);
947 return 0;
948 case TCSBRKP:
949 retval = tty_check_change(tty);
950 if (retval)
951 return retval;
952 tty_wait_until_sent(tty, 0);
953 send_break(info, arg ? arg*(100) : 250);
954 return 0;
955 case TIOCGSERIAL:
956 return get_serial_info(info,
957 (struct serial_struct *) arg);
958 case TIOCSSERIAL:
959 return set_serial_info(info, tty,
960 (struct serial_struct *) arg);
961 case TIOCSERGETLSR:
962 return get_lsr_info(info, (unsigned int *) arg);
963 case TIOCSERGSTRUCT:
964 if (copy_to_user((struct m68k_serial *) arg,
965 info, sizeof(struct m68k_serial)))
966 return -EFAULT;
967 return 0;
968 default:
969 return -ENOIOCTLCMD;
970 }
971 return 0;
972}
973
974static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
975{
976 struct m68k_serial *info = (struct m68k_serial *)tty->driver_data;
977
978 change_speed(info, tty);
979
980 if ((old_termios->c_cflag & CRTSCTS) &&
981 !(tty->termios.c_cflag & CRTSCTS)) {
982 tty->hw_stopped = 0;
983 rs_start(tty);
984 }
985
986}
987
988
989
990
991
992
993
994
995
996
997
998static void rs_close(struct tty_struct *tty, struct file * filp)
999{
1000 struct m68k_serial * info = (struct m68k_serial *)tty->driver_data;
1001 struct tty_port *port = &info->tport;
1002 m68328_uart *uart = &uart_addr[info->line];
1003 unsigned long flags;
1004
1005 if (serial_paranoia_check(info, tty->name, "rs_close"))
1006 return;
1007
1008 local_irq_save(flags);
1009
1010 if (tty_hung_up_p(filp)) {
1011 local_irq_restore(flags);
1012 return;
1013 }
1014
1015 if ((tty->count == 1) && (port->count != 1)) {
1016
1017
1018
1019
1020
1021
1022
1023 printk("rs_close: bad serial port count; tty->count is 1, "
1024 "port->count is %d\n", port->count);
1025 port->count = 1;
1026 }
1027 if (--port->count < 0) {
1028 printk("rs_close: bad serial port count for ttyS%d: %d\n",
1029 info->line, port->count);
1030 port->count = 0;
1031 }
1032 if (port->count) {
1033 local_irq_restore(flags);
1034 return;
1035 }
1036 port->flags |= ASYNC_CLOSING;
1037
1038
1039
1040
1041 tty->closing = 1;
1042 if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1043 tty_wait_until_sent(tty, port->closing_wait);
1044
1045
1046
1047
1048
1049
1050
1051 uart->ustcnt &= ~USTCNT_RXEN;
1052 uart->ustcnt &= ~(USTCNT_RXEN | USTCNT_RX_INTR_MASK);
1053
1054 shutdown(info, tty);
1055 rs_flush_buffer(tty);
1056
1057 tty_ldisc_flush(tty);
1058 tty->closing = 0;
1059 tty_port_tty_set(&info->tport, NULL);
1060#warning "This is not and has never been valid so fix it"
1061#if 0
1062 if (tty->ldisc.num != ldiscs[N_TTY].num) {
1063 if (tty->ldisc.close)
1064 (tty->ldisc.close)(tty);
1065 tty->ldisc = ldiscs[N_TTY];
1066 tty->termios.c_line = N_TTY;
1067 if (tty->ldisc.open)
1068 (tty->ldisc.open)(tty);
1069 }
1070#endif
1071 if (port->blocked_open) {
1072 if (port->close_delay)
1073 msleep_interruptible(jiffies_to_msecs(port->close_delay));
1074 wake_up_interruptible(&port->open_wait);
1075 }
1076 port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1077 wake_up_interruptible(&port->close_wait);
1078 local_irq_restore(flags);
1079}
1080
1081
1082
1083
1084void rs_hangup(struct tty_struct *tty)
1085{
1086 struct m68k_serial * info = (struct m68k_serial *)tty->driver_data;
1087
1088 if (serial_paranoia_check(info, tty->name, "rs_hangup"))
1089 return;
1090
1091 rs_flush_buffer(tty);
1092 shutdown(info, tty);
1093 info->tport.count = 0;
1094 info->tport.flags &= ~ASYNC_NORMAL_ACTIVE;
1095 tty_port_tty_set(&info->tport, NULL);
1096 wake_up_interruptible(&info->tport.open_wait);
1097}
1098
1099
1100
1101
1102
1103
1104
1105int rs_open(struct tty_struct *tty, struct file * filp)
1106{
1107 struct m68k_serial *info;
1108 int retval;
1109
1110 info = &m68k_soft[tty->index];
1111
1112 if (serial_paranoia_check(info, tty->name, "rs_open"))
1113 return -ENODEV;
1114
1115 info->tport.count++;
1116 tty->driver_data = info;
1117 tty_port_tty_set(&info->tport, tty);
1118
1119
1120
1121
1122 retval = startup(info, tty);
1123 if (retval)
1124 return retval;
1125
1126 return tty_port_block_til_ready(&info->tport, tty, filp);
1127}
1128
1129
1130
1131static void show_serial_version(void)
1132{
1133 printk("MC68328 serial driver version 1.00\n");
1134}
1135
1136static const struct tty_operations rs_ops = {
1137 .open = rs_open,
1138 .close = rs_close,
1139 .write = rs_write,
1140 .flush_chars = rs_flush_chars,
1141 .write_room = rs_write_room,
1142 .chars_in_buffer = rs_chars_in_buffer,
1143 .flush_buffer = rs_flush_buffer,
1144 .ioctl = rs_ioctl,
1145 .throttle = rs_throttle,
1146 .unthrottle = rs_unthrottle,
1147 .set_termios = rs_set_termios,
1148 .stop = rs_stop,
1149 .start = rs_start,
1150 .hangup = rs_hangup,
1151 .set_ldisc = rs_set_ldisc,
1152};
1153
1154static const struct tty_port_operations rs_port_ops = {
1155};
1156
1157
1158static int __init
1159rs68328_init(void)
1160{
1161 unsigned long flags;
1162 int i;
1163 struct m68k_serial *info;
1164
1165 serial_driver = alloc_tty_driver(NR_PORTS);
1166 if (!serial_driver)
1167 return -ENOMEM;
1168
1169 show_serial_version();
1170
1171
1172
1173
1174 serial_driver->name = "ttyS";
1175 serial_driver->major = TTY_MAJOR;
1176 serial_driver->minor_start = 64;
1177 serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
1178 serial_driver->subtype = SERIAL_TYPE_NORMAL;
1179 serial_driver->init_termios = tty_std_termios;
1180 serial_driver->init_termios.c_cflag =
1181 m68328_console_cbaud | CS8 | CREAD | HUPCL | CLOCAL;
1182 serial_driver->flags = TTY_DRIVER_REAL_RAW;
1183 tty_set_operations(serial_driver, &rs_ops);
1184
1185 local_irq_save(flags);
1186
1187 for(i=0;i<NR_PORTS;i++) {
1188
1189 info = &m68k_soft[i];
1190 tty_port_init(&info->tport);
1191 info->tport.ops = &rs_port_ops;
1192 info->magic = SERIAL_MAGIC;
1193 info->port = (int) &uart_addr[i];
1194 info->irq = uart_irqs[i];
1195 info->custom_divisor = 16;
1196 info->x_char = 0;
1197 info->line = i;
1198 info->is_cons = 1;
1199
1200 printk("%s%d at 0x%08x (irq = %d)", serial_driver->name, info->line,
1201 info->port, info->irq);
1202 printk(" is a builtin MC68328 UART\n");
1203
1204#ifdef CONFIG_M68VZ328
1205 if (i > 0 )
1206 PJSEL &= 0xCF;
1207#endif
1208
1209 if (request_irq(uart_irqs[i],
1210 rs_interrupt,
1211 0,
1212 "M68328_UART", info))
1213 panic("Unable to attach 68328 serial interrupt\n");
1214
1215 tty_port_link_device(&info->tport, serial_driver, i);
1216 }
1217 local_irq_restore(flags);
1218
1219 if (tty_register_driver(serial_driver)) {
1220 put_tty_driver(serial_driver);
1221 for (i = 0; i < NR_PORTS; i++)
1222 tty_port_destroy(&m68k_soft[i].tport);
1223 printk(KERN_ERR "Couldn't register serial driver\n");
1224 return -ENOMEM;
1225 }
1226
1227 return 0;
1228}
1229
1230module_init(rs68328_init);
1231
1232
1233
1234static void m68328_set_baud(void)
1235{
1236 unsigned short ustcnt;
1237 int i;
1238
1239 ustcnt = USTCNT;
1240 USTCNT = ustcnt & ~USTCNT_TXEN;
1241
1242again:
1243 for (i = 0; i < ARRAY_SIZE(baud_table); i++)
1244 if (baud_table[i] == m68328_console_baud)
1245 break;
1246 if (i >= ARRAY_SIZE(baud_table)) {
1247 m68328_console_baud = 9600;
1248 goto again;
1249 }
1250
1251 UBAUD = PUT_FIELD(UBAUD_DIVIDE, hw_baud_table[i].divisor) |
1252 PUT_FIELD(UBAUD_PRESCALER, hw_baud_table[i].prescale);
1253 ustcnt &= ~(USTCNT_PARITYEN | USTCNT_ODD_EVEN | USTCNT_STOP | USTCNT_8_7);
1254 ustcnt |= USTCNT_8_7;
1255 ustcnt |= USTCNT_TXEN;
1256 USTCNT = ustcnt;
1257 m68328_console_initted = 1;
1258 return;
1259}
1260
1261
1262int m68328_console_setup(struct console *cp, char *arg)
1263{
1264 int i, n = CONSOLE_BAUD_RATE;
1265
1266 if (!cp)
1267 return(-1);
1268
1269 if (arg)
1270 n = simple_strtoul(arg,NULL,0);
1271
1272 for (i = 0; i < ARRAY_SIZE(baud_table); i++)
1273 if (baud_table[i] == n)
1274 break;
1275 if (i < ARRAY_SIZE(baud_table)) {
1276 m68328_console_baud = n;
1277 m68328_console_cbaud = 0;
1278 if (i > 15) {
1279 m68328_console_cbaud |= CBAUDEX;
1280 i -= 15;
1281 }
1282 m68328_console_cbaud |= i;
1283 }
1284
1285 m68328_set_baud();
1286 return(0);
1287}
1288
1289
1290static struct tty_driver *m68328_console_device(struct console *c, int *index)
1291{
1292 *index = c->index;
1293 return serial_driver;
1294}
1295
1296
1297void m68328_console_write (struct console *co, const char *str,
1298 unsigned int count)
1299{
1300 if (!m68328_console_initted)
1301 m68328_set_baud();
1302 while (count--) {
1303 if (*str == '\n')
1304 rs_put_char('\r');
1305 rs_put_char( *str++ );
1306 }
1307}
1308
1309
1310static struct console m68328_driver = {
1311 .name = "ttyS",
1312 .write = m68328_console_write,
1313 .device = m68328_console_device,
1314 .setup = m68328_console_setup,
1315 .flags = CON_PRINTBUFFER,
1316 .index = -1,
1317};
1318
1319
1320static int __init m68328_console_init(void)
1321{
1322 register_console(&m68328_driver);
1323 return 0;
1324}
1325
1326console_initcall(m68328_console_init);
1327