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Linux 2.6.33-rc8
[linux-2.6/lguest.git] / drivers / serial / sunsu.c
blob170d3d68c8f04d38fb67f8d3b84c9c977f57f7a1
1 /*
2 * su.c: Small serial driver for keyboard/mouse interface on sparc32/PCI
3 *
4 * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
5 * Copyright (C) 1998-1999 Pete Zaitcev (zaitcev@yahoo.com)
6 *
7 * This is mainly a variation of 8250.c, credits go to authors mentioned
8 * therein. In fact this driver should be merged into the generic 8250.c
9 * infrastructure perhaps using a 8250_sparc.c module.
10 *
11 * Fixed to use tty_get_baud_rate().
12 * Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12
13 *
14 * Converted to new 2.5.x UART layer.
15 * David S. Miller (davem@davemloft.net), 2002-Jul-29
16 */
17
18 #include <linux/module.h>
19 #include <linux/kernel.h>
20 #include <linux/spinlock.h>
21 #include <linux/errno.h>
22 #include <linux/tty.h>
23 #include <linux/tty_flip.h>
24 #include <linux/major.h>
25 #include <linux/string.h>
26 #include <linux/ptrace.h>
27 #include <linux/ioport.h>
28 #include <linux/circ_buf.h>
29 #include <linux/serial.h>
30 #include <linux/sysrq.h>
31 #include <linux/console.h>
32 #ifdef CONFIG_SERIO
33 #include <linux/serio.h>
34 #endif
35 #include <linux/serial_reg.h>
36 #include <linux/init.h>
37 #include <linux/delay.h>
38 #include <linux/of_device.h>
39
40 #include <asm/io.h>
41 #include <asm/irq.h>
42 #include <asm/prom.h>
43
44 #if defined(CONFIG_SERIAL_SUNSU_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
45 #define SUPPORT_SYSRQ
46 #endif
47
48 #include <linux/serial_core.h>
49
50 #include "suncore.h"
51
52 /* We are on a NS PC87303 clocked with 24.0 MHz, which results
53 * in a UART clock of 1.8462 MHz.
54 */
55 #define SU_BASE_BAUD (1846200 / 16)
56
57 enum su_type { SU_PORT_NONE, SU_PORT_MS, SU_PORT_KBD, SU_PORT_PORT };
58 static char *su_typev[] = { "su(???)", "su(mouse)", "su(kbd)", "su(serial)" };
59
60 /*
61 * Here we define the default xmit fifo size used for each type of UART.
62 */
63 static const struct serial_uart_config uart_config[PORT_MAX_8250+1] = {
64 { "unknown", 1, 0 },
65 { "8250", 1, 0 },
66 { "16450", 1, 0 },
67 { "16550", 1, 0 },
68 { "16550A", 16, UART_CLEAR_FIFO | UART_USE_FIFO },
69 { "Cirrus", 1, 0 },
70 { "ST16650", 1, UART_CLEAR_FIFO | UART_STARTECH },
71 { "ST16650V2", 32, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH },
72 { "TI16750", 64, UART_CLEAR_FIFO | UART_USE_FIFO },
73 { "Startech", 1, 0 },
74 { "16C950/954", 128, UART_CLEAR_FIFO | UART_USE_FIFO },
75 { "ST16654", 64, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH },
76 { "XR16850", 128, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH },
77 { "RSA", 2048, UART_CLEAR_FIFO | UART_USE_FIFO }
78 };
79
80 struct uart_sunsu_port {
81 struct uart_port port;
82 unsigned char acr;
83 unsigned char ier;
84 unsigned short rev;
85 unsigned char lcr;
86 unsigned int lsr_break_flag;
87 unsigned int cflag;
88
89 /* Probing information. */
90 enum su_type su_type;
91 unsigned int type_probed; /* XXX Stupid */
92 unsigned long reg_size;
93
94 #ifdef CONFIG_SERIO
95 struct serio serio;
96 int serio_open;
97 #endif
98 };
99
100 static unsigned int serial_in(struct uart_sunsu_port *up, int offset)
101 {
102 offset <<= up->port.regshift;
103
104 switch (up->port.iotype) {
105 case UPIO_HUB6:
106 outb(up->port.hub6 - 1 + offset, up->port.iobase);
107 return inb(up->port.iobase + 1);
108
109 case UPIO_MEM:
110 return readb(up->port.membase + offset);
111
112 default:
113 return inb(up->port.iobase + offset);
114 }
115 }
116
117 static void serial_out(struct uart_sunsu_port *up, int offset, int value)
118 {
119 #ifndef CONFIG_SPARC64
120 /*
121 * MrCoffee has weird schematics: IRQ4 & P10(?) pins of SuperIO are
122 * connected with a gate then go to SlavIO. When IRQ4 goes tristated
123 * gate outputs a logical one. Since we use level triggered interrupts
124 * we have lockup and watchdog reset. We cannot mask IRQ because
125 * keyboard shares IRQ with us (Word has it as Bob Smelik's design).
126 * This problem is similar to what Alpha people suffer, see serial.c.
127 */
128 if (offset == UART_MCR)
129 value |= UART_MCR_OUT2;
130 #endif
131 offset <<= up->port.regshift;
132
133 switch (up->port.iotype) {
134 case UPIO_HUB6:
135 outb(up->port.hub6 - 1 + offset, up->port.iobase);
136 outb(value, up->port.iobase + 1);
137 break;
138
139 case UPIO_MEM:
140 writeb(value, up->port.membase + offset);
141 break;
142
143 default:
144 outb(value, up->port.iobase + offset);
145 }
146 }
147
148 /*
149 * We used to support using pause I/O for certain machines. We
150 * haven't supported this for a while, but just in case it's badly
151 * needed for certain old 386 machines, I've left these #define's
152 * in....
153 */
154 #define serial_inp(up, offset) serial_in(up, offset)
155 #define serial_outp(up, offset, value) serial_out(up, offset, value)
156
157
158 /*
159 * For the 16C950
160 */
161 static void serial_icr_write(struct uart_sunsu_port *up, int offset, int value)
162 {
163 serial_out(up, UART_SCR, offset);
164 serial_out(up, UART_ICR, value);
165 }
166
167 #if 0 /* Unused currently */
168 static unsigned int serial_icr_read(struct uart_sunsu_port *up, int offset)
169 {
170 unsigned int value;
171
172 serial_icr_write(up, UART_ACR, up->acr | UART_ACR_ICRRD);
173 serial_out(up, UART_SCR, offset);
174 value = serial_in(up, UART_ICR);
175 serial_icr_write(up, UART_ACR, up->acr);
176
177 return value;
178 }
179 #endif
180
181 #ifdef CONFIG_SERIAL_8250_RSA
182 /*
183 * Attempts to turn on the RSA FIFO. Returns zero on failure.
184 * We set the port uart clock rate if we succeed.
185 */
186 static int __enable_rsa(struct uart_sunsu_port *up)
187 {
188 unsigned char mode;
189 int result;
190
191 mode = serial_inp(up, UART_RSA_MSR);
192 result = mode & UART_RSA_MSR_FIFO;
193
194 if (!result) {
195 serial_outp(up, UART_RSA_MSR, mode | UART_RSA_MSR_FIFO);
196 mode = serial_inp(up, UART_RSA_MSR);
197 result = mode & UART_RSA_MSR_FIFO;
198 }
199
200 if (result)
201 up->port.uartclk = SERIAL_RSA_BAUD_BASE * 16;
202
203 return result;
204 }
205
206 static void enable_rsa(struct uart_sunsu_port *up)
207 {
208 if (up->port.type == PORT_RSA) {
209 if (up->port.uartclk != SERIAL_RSA_BAUD_BASE * 16) {
210 spin_lock_irq(&up->port.lock);
211 __enable_rsa(up);
212 spin_unlock_irq(&up->port.lock);
213 }
214 if (up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16)
215 serial_outp(up, UART_RSA_FRR, 0);
216 }
217 }
218
219 /*
220 * Attempts to turn off the RSA FIFO. Returns zero on failure.
221 * It is unknown why interrupts were disabled in here. However,
222 * the caller is expected to preserve this behaviour by grabbing
223 * the spinlock before calling this function.
224 */
225 static void disable_rsa(struct uart_sunsu_port *up)
226 {
227 unsigned char mode;
228 int result;
229
230 if (up->port.type == PORT_RSA &&
231 up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) {
232 spin_lock_irq(&up->port.lock);
233
234 mode = serial_inp(up, UART_RSA_MSR);
235 result = !(mode & UART_RSA_MSR_FIFO);
236
237 if (!result) {
238 serial_outp(up, UART_RSA_MSR, mode & ~UART_RSA_MSR_FIFO);
239 mode = serial_inp(up, UART_RSA_MSR);
240 result = !(mode & UART_RSA_MSR_FIFO);
241 }
242
243 if (result)
244 up->port.uartclk = SERIAL_RSA_BAUD_BASE_LO * 16;
245 spin_unlock_irq(&up->port.lock);
246 }
247 }
248 #endif /* CONFIG_SERIAL_8250_RSA */
249
250 static inline void __stop_tx(struct uart_sunsu_port *p)
251 {
252 if (p->ier & UART_IER_THRI) {
253 p->ier &= ~UART_IER_THRI;
254 serial_out(p, UART_IER, p->ier);
255 }
256 }
257
258 static void sunsu_stop_tx(struct uart_port *port)
259 {
260 struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
261
262 __stop_tx(up);
263
264 /*
265 * We really want to stop the transmitter from sending.
266 */
267 if (up->port.type == PORT_16C950) {
268 up->acr |= UART_ACR_TXDIS;
269 serial_icr_write(up, UART_ACR, up->acr);
270 }
271 }
272
273 static void sunsu_start_tx(struct uart_port *port)
274 {
275 struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
276
277 if (!(up->ier & UART_IER_THRI)) {
278 up->ier |= UART_IER_THRI;
279 serial_out(up, UART_IER, up->ier);
280 }
281
282 /*
283 * Re-enable the transmitter if we disabled it.
284 */
285 if (up->port.type == PORT_16C950 && up->acr & UART_ACR_TXDIS) {
286 up->acr &= ~UART_ACR_TXDIS;
287 serial_icr_write(up, UART_ACR, up->acr);
288 }
289 }
290
291 static void sunsu_stop_rx(struct uart_port *port)
292 {
293 struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
294
295 up->ier &= ~UART_IER_RLSI;
296 up->port.read_status_mask &= ~UART_LSR_DR;
297 serial_out(up, UART_IER, up->ier);
298 }
299
300 static void sunsu_enable_ms(struct uart_port *port)
301 {
302 struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
303 unsigned long flags;
304
305 spin_lock_irqsave(&up->port.lock, flags);
306 up->ier |= UART_IER_MSI;
307 serial_out(up, UART_IER, up->ier);
308 spin_unlock_irqrestore(&up->port.lock, flags);
309 }
310
311 static struct tty_struct *
312 receive_chars(struct uart_sunsu_port *up, unsigned char *status)
313 {
314 struct tty_struct *tty = up->port.state->port.tty;
315 unsigned char ch, flag;
316 int max_count = 256;
317 int saw_console_brk = 0;
318
319 do {
320 ch = serial_inp(up, UART_RX);
321 flag = TTY_NORMAL;
322 up->port.icount.rx++;
323
324 if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE |
325 UART_LSR_FE | UART_LSR_OE))) {
326 /*
327 * For statistics only
328 */
329 if (*status & UART_LSR_BI) {
330 *status &= ~(UART_LSR_FE | UART_LSR_PE);
331 up->port.icount.brk++;
332 if (up->port.cons != NULL &&
333 up->port.line == up->port.cons->index)
334 saw_console_brk = 1;
335 /*
336 * We do the SysRQ and SAK checking
337 * here because otherwise the break
338 * may get masked by ignore_status_mask
339 * or read_status_mask.
340 */
341 if (uart_handle_break(&up->port))
342 goto ignore_char;
343 } else if (*status & UART_LSR_PE)
344 up->port.icount.parity++;
345 else if (*status & UART_LSR_FE)
346 up->port.icount.frame++;
347 if (*status & UART_LSR_OE)
348 up->port.icount.overrun++;
349
350 /*
351 * Mask off conditions which should be ingored.
352 */
353 *status &= up->port.read_status_mask;
354
355 if (up->port.cons != NULL &&
356 up->port.line == up->port.cons->index) {
357 /* Recover the break flag from console xmit */
358 *status |= up->lsr_break_flag;
359 up->lsr_break_flag = 0;
360 }
361
362 if (*status & UART_LSR_BI) {
363 flag = TTY_BREAK;
364 } else if (*status & UART_LSR_PE)
365 flag = TTY_PARITY;
366 else if (*status & UART_LSR_FE)
367 flag = TTY_FRAME;
368 }
369 if (uart_handle_sysrq_char(&up->port, ch))
370 goto ignore_char;
371 if ((*status & up->port.ignore_status_mask) == 0)
372 tty_insert_flip_char(tty, ch, flag);
373 if (*status & UART_LSR_OE)
374 /*
375 * Overrun is special, since it's reported
376 * immediately, and doesn't affect the current
377 * character.
378 */
379 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
380 ignore_char:
381 *status = serial_inp(up, UART_LSR);
382 } while ((*status & UART_LSR_DR) && (max_count-- > 0));
383
384 if (saw_console_brk)
385 sun_do_break();
386
387 return tty;
388 }
389
390 static void transmit_chars(struct uart_sunsu_port *up)
391 {
392 struct circ_buf *xmit = &up->port.state->xmit;
393 int count;
394
395 if (up->port.x_char) {
396 serial_outp(up, UART_TX, up->port.x_char);
397 up->port.icount.tx++;
398 up->port.x_char = 0;
399 return;
400 }
401 if (uart_tx_stopped(&up->port)) {
402 sunsu_stop_tx(&up->port);
403 return;
404 }
405 if (uart_circ_empty(xmit)) {
406 __stop_tx(up);
407 return;
408 }
409
410 count = up->port.fifosize;
411 do {
412 serial_out(up, UART_TX, xmit->buf[xmit->tail]);
413 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
414 up->port.icount.tx++;
415 if (uart_circ_empty(xmit))
416 break;
417 } while (--count > 0);
418
419 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
420 uart_write_wakeup(&up->port);
421
422 if (uart_circ_empty(xmit))
423 __stop_tx(up);
424 }
425
426 static void check_modem_status(struct uart_sunsu_port *up)
427 {
428 int status;
429
430 status = serial_in(up, UART_MSR);
431
432 if ((status & UART_MSR_ANY_DELTA) == 0)
433 return;
434
435 if (status & UART_MSR_TERI)
436 up->port.icount.rng++;
437 if (status & UART_MSR_DDSR)
438 up->port.icount.dsr++;
439 if (status & UART_MSR_DDCD)
440 uart_handle_dcd_change(&up->port, status & UART_MSR_DCD);
441 if (status & UART_MSR_DCTS)
442 uart_handle_cts_change(&up->port, status & UART_MSR_CTS);
443
444 wake_up_interruptible(&up->port.state->port.delta_msr_wait);
445 }
446
447 static irqreturn_t sunsu_serial_interrupt(int irq, void *dev_id)
448 {
449 struct uart_sunsu_port *up = dev_id;
450 unsigned long flags;
451 unsigned char status;
452
453 spin_lock_irqsave(&up->port.lock, flags);
454
455 do {
456 struct tty_struct *tty;
457
458 status = serial_inp(up, UART_LSR);
459 tty = NULL;
460 if (status & UART_LSR_DR)
461 tty = receive_chars(up, &status);
462 check_modem_status(up);
463 if (status & UART_LSR_THRE)
464 transmit_chars(up);
465
466 spin_unlock_irqrestore(&up->port.lock, flags);
467
468 if (tty)
469 tty_flip_buffer_push(tty);
470
471 spin_lock_irqsave(&up->port.lock, flags);
472
473 } while (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT));
474
475 spin_unlock_irqrestore(&up->port.lock, flags);
476
477 return IRQ_HANDLED;
478 }
479
480 /* Separate interrupt handling path for keyboard/mouse ports. */
481
482 static void
483 sunsu_change_speed(struct uart_port *port, unsigned int cflag,
484 unsigned int iflag, unsigned int quot);
485
486 static void sunsu_change_mouse_baud(struct uart_sunsu_port *up)
487 {
488 unsigned int cur_cflag = up->cflag;
489 int quot, new_baud;
490
491 up->cflag &= ~CBAUD;
492 up->cflag |= suncore_mouse_baud_cflag_next(cur_cflag, &new_baud);
493
494 quot = up->port.uartclk / (16 * new_baud);
495
496 sunsu_change_speed(&up->port, up->cflag, 0, quot);
497 }
498
499 static void receive_kbd_ms_chars(struct uart_sunsu_port *up, int is_break)
500 {
501 do {
502 unsigned char ch = serial_inp(up, UART_RX);
503
504 /* Stop-A is handled by drivers/char/keyboard.c now. */
505 if (up->su_type == SU_PORT_KBD) {
506 #ifdef CONFIG_SERIO
507 serio_interrupt(&up->serio, ch, 0);
508 #endif
509 } else if (up->su_type == SU_PORT_MS) {
510 int ret = suncore_mouse_baud_detection(ch, is_break);
511
512 switch (ret) {
513 case 2:
514 sunsu_change_mouse_baud(up);
515 /* fallthru */
516 case 1:
517 break;
518
519 case 0:
520 #ifdef CONFIG_SERIO
521 serio_interrupt(&up->serio, ch, 0);
522 #endif
523 break;
524 };
525 }
526 } while (serial_in(up, UART_LSR) & UART_LSR_DR);
527 }
528
529 static irqreturn_t sunsu_kbd_ms_interrupt(int irq, void *dev_id)
530 {
531 struct uart_sunsu_port *up = dev_id;
532
533 if (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT)) {
534 unsigned char status = serial_inp(up, UART_LSR);
535
536 if ((status & UART_LSR_DR) || (status & UART_LSR_BI))
537 receive_kbd_ms_chars(up, (status & UART_LSR_BI) != 0);
538 }
539
540 return IRQ_HANDLED;
541 }
542
543 static unsigned int sunsu_tx_empty(struct uart_port *port)
544 {
545 struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
546 unsigned long flags;
547 unsigned int ret;
548
549 spin_lock_irqsave(&up->port.lock, flags);
550 ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
551 spin_unlock_irqrestore(&up->port.lock, flags);
552
553 return ret;
554 }
555
556 static unsigned int sunsu_get_mctrl(struct uart_port *port)
557 {
558 struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
559 unsigned char status;
560 unsigned int ret;
561
562 status = serial_in(up, UART_MSR);
563
564 ret = 0;
565 if (status & UART_MSR_DCD)
566 ret |= TIOCM_CAR;
567 if (status & UART_MSR_RI)
568 ret |= TIOCM_RNG;
569 if (status & UART_MSR_DSR)
570 ret |= TIOCM_DSR;
571 if (status & UART_MSR_CTS)
572 ret |= TIOCM_CTS;
573 return ret;
574 }
575
576 static void sunsu_set_mctrl(struct uart_port *port, unsigned int mctrl)
577 {
578 struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
579 unsigned char mcr = 0;
580
581 if (mctrl & TIOCM_RTS)
582 mcr |= UART_MCR_RTS;
583 if (mctrl & TIOCM_DTR)
584 mcr |= UART_MCR_DTR;
585 if (mctrl & TIOCM_OUT1)
586 mcr |= UART_MCR_OUT1;
587 if (mctrl & TIOCM_OUT2)
588 mcr |= UART_MCR_OUT2;
589 if (mctrl & TIOCM_LOOP)
590 mcr |= UART_MCR_LOOP;
591
592 serial_out(up, UART_MCR, mcr);
593 }
594
595 static void sunsu_break_ctl(struct uart_port *port, int break_state)
596 {
597 struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
598 unsigned long flags;
599
600 spin_lock_irqsave(&up->port.lock, flags);
601 if (break_state == -1)
602 up->lcr |= UART_LCR_SBC;
603 else
604 up->lcr &= ~UART_LCR_SBC;
605 serial_out(up, UART_LCR, up->lcr);
606 spin_unlock_irqrestore(&up->port.lock, flags);
607 }
608
609 static int sunsu_startup(struct uart_port *port)
610 {
611 struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
612 unsigned long flags;
613 int retval;
614
615 if (up->port.type == PORT_16C950) {
616 /* Wake up and initialize UART */
617 up->acr = 0;
618 serial_outp(up, UART_LCR, 0xBF);
619 serial_outp(up, UART_EFR, UART_EFR_ECB);
620 serial_outp(up, UART_IER, 0);
621 serial_outp(up, UART_LCR, 0);
622 serial_icr_write(up, UART_CSR, 0); /* Reset the UART */
623 serial_outp(up, UART_LCR, 0xBF);
624 serial_outp(up, UART_EFR, UART_EFR_ECB);
625 serial_outp(up, UART_LCR, 0);
626 }
627
628 #ifdef CONFIG_SERIAL_8250_RSA
629 /*
630 * If this is an RSA port, see if we can kick it up to the
631 * higher speed clock.
632 */
633 enable_rsa(up);
634 #endif
635
636 /*
637 * Clear the FIFO buffers and disable them.
638 * (they will be reenabled in set_termios())
639 */
640 if (uart_config[up->port.type].flags & UART_CLEAR_FIFO) {
641 serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
642 serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO |
643 UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
644 serial_outp(up, UART_FCR, 0);
645 }
646
647 /*
648 * Clear the interrupt registers.
649 */
650 (void) serial_inp(up, UART_LSR);
651 (void) serial_inp(up, UART_RX);
652 (void) serial_inp(up, UART_IIR);
653 (void) serial_inp(up, UART_MSR);
654
655 /*
656 * At this point, there's no way the LSR could still be 0xff;
657 * if it is, then bail out, because there's likely no UART
658 * here.
659 */
660 if (!(up->port.flags & UPF_BUGGY_UART) &&
661 (serial_inp(up, UART_LSR) == 0xff)) {
662 printk("ttyS%d: LSR safety check engaged!\n", up->port.line);
663 return -ENODEV;
664 }
665
666 if (up->su_type != SU_PORT_PORT) {
667 retval = request_irq(up->port.irq, sunsu_kbd_ms_interrupt,
668 IRQF_SHARED, su_typev[up->su_type], up);
669 } else {
670 retval = request_irq(up->port.irq, sunsu_serial_interrupt,
671 IRQF_SHARED, su_typev[up->su_type], up);
672 }
673 if (retval) {
674 printk("su: Cannot register IRQ %d\n", up->port.irq);
675 return retval;
676 }
677
678 /*
679 * Now, initialize the UART
680 */
681 serial_outp(up, UART_LCR, UART_LCR_WLEN8);
682
683 spin_lock_irqsave(&up->port.lock, flags);
684
685 up->port.mctrl |= TIOCM_OUT2;
686
687 sunsu_set_mctrl(&up->port, up->port.mctrl);
688 spin_unlock_irqrestore(&up->port.lock, flags);
689
690 /*
691 * Finally, enable interrupts. Note: Modem status interrupts
692 * are set via set_termios(), which will be occurring imminently
693 * anyway, so we don't enable them here.
694 */
695 up->ier = UART_IER_RLSI | UART_IER_RDI;
696 serial_outp(up, UART_IER, up->ier);
697
698 if (up->port.flags & UPF_FOURPORT) {
699 unsigned int icp;
700 /*
701 * Enable interrupts on the AST Fourport board
702 */
703 icp = (up->port.iobase & 0xfe0) | 0x01f;
704 outb_p(0x80, icp);
705 (void) inb_p(icp);
706 }
707
708 /*
709 * And clear the interrupt registers again for luck.
710 */
711 (void) serial_inp(up, UART_LSR);
712 (void) serial_inp(up, UART_RX);
713 (void) serial_inp(up, UART_IIR);
714 (void) serial_inp(up, UART_MSR);
715
716 return 0;
717 }
718
719 static void sunsu_shutdown(struct uart_port *port)
720 {
721 struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
722 unsigned long flags;
723
724 /*
725 * Disable interrupts from this port
726 */
727 up->ier = 0;
728 serial_outp(up, UART_IER, 0);
729
730 spin_lock_irqsave(&up->port.lock, flags);
731 if (up->port.flags & UPF_FOURPORT) {
732 /* reset interrupts on the AST Fourport board */
733 inb((up->port.iobase & 0xfe0) | 0x1f);
734 up->port.mctrl |= TIOCM_OUT1;
735 } else
736 up->port.mctrl &= ~TIOCM_OUT2;
737
738 sunsu_set_mctrl(&up->port, up->port.mctrl);
739 spin_unlock_irqrestore(&up->port.lock, flags);
740
741 /*
742 * Disable break condition and FIFOs
743 */
744 serial_out(up, UART_LCR, serial_inp(up, UART_LCR) & ~UART_LCR_SBC);
745 serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO |
746 UART_FCR_CLEAR_RCVR |
747 UART_FCR_CLEAR_XMIT);
748 serial_outp(up, UART_FCR, 0);
749
750 #ifdef CONFIG_SERIAL_8250_RSA
751 /*
752 * Reset the RSA board back to 115kbps compat mode.
753 */
754 disable_rsa(up);
755 #endif
756
757 /*
758 * Read data port to reset things.
759 */
760 (void) serial_in(up, UART_RX);
761
762 free_irq(up->port.irq, up);
763 }
764
765 static void
766 sunsu_change_speed(struct uart_port *port, unsigned int cflag,
767 unsigned int iflag, unsigned int quot)
768 {
769 struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
770 unsigned char cval, fcr = 0;
771 unsigned long flags;
772
773 switch (cflag & CSIZE) {
774 case CS5:
775 cval = 0x00;
776 break;
777 case CS6:
778 cval = 0x01;
779 break;
780 case CS7:
781 cval = 0x02;
782 break;
783 default:
784 case CS8:
785 cval = 0x03;
786 break;
787 }
788
789 if (cflag & CSTOPB)
790 cval |= 0x04;
791 if (cflag & PARENB)
792 cval |= UART_LCR_PARITY;
793 if (!(cflag & PARODD))
794 cval |= UART_LCR_EPAR;
795 #ifdef CMSPAR
796 if (cflag & CMSPAR)
797 cval |= UART_LCR_SPAR;
798 #endif
799
800 /*
801 * Work around a bug in the Oxford Semiconductor 952 rev B
802 * chip which causes it to seriously miscalculate baud rates
803 * when DLL is 0.
804 */
805 if ((quot & 0xff) == 0 && up->port.type == PORT_16C950 &&
806 up->rev == 0x5201)
807 quot ++;
808
809 if (uart_config[up->port.type].flags & UART_USE_FIFO) {
810 if ((up->port.uartclk / quot) < (2400 * 16))
811 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
812 #ifdef CONFIG_SERIAL_8250_RSA
813 else if (up->port.type == PORT_RSA)
814 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_14;
815 #endif
816 else
817 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8;
818 }
819 if (up->port.type == PORT_16750)
820 fcr |= UART_FCR7_64BYTE;
821
822 /*
823 * Ok, we're now changing the port state. Do it with
824 * interrupts disabled.
825 */
826 spin_lock_irqsave(&up->port.lock, flags);
827
828 /*
829 * Update the per-port timeout.
830 */
831 uart_update_timeout(port, cflag, (port->uartclk / (16 * quot)));
832
833 up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
834 if (iflag & INPCK)
835 up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
836 if (iflag & (BRKINT | PARMRK))
837 up->port.read_status_mask |= UART_LSR_BI;
838
839 /*
840 * Characteres to ignore
841 */
842 up->port.ignore_status_mask = 0;
843 if (iflag & IGNPAR)
844 up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
845 if (iflag & IGNBRK) {
846 up->port.ignore_status_mask |= UART_LSR_BI;
847 /*
848 * If we're ignoring parity and break indicators,
849 * ignore overruns too (for real raw support).
850 */
851 if (iflag & IGNPAR)
852 up->port.ignore_status_mask |= UART_LSR_OE;
853 }
854
855 /*
856 * ignore all characters if CREAD is not set
857 */
858 if ((cflag & CREAD) == 0)
859 up->port.ignore_status_mask |= UART_LSR_DR;
860
861 /*
862 * CTS flow control flag and modem status interrupts
863 */
864 up->ier &= ~UART_IER_MSI;
865 if (UART_ENABLE_MS(&up->port, cflag))
866 up->ier |= UART_IER_MSI;
867
868 serial_out(up, UART_IER, up->ier);
869
870 if (uart_config[up->port.type].flags & UART_STARTECH) {
871 serial_outp(up, UART_LCR, 0xBF);
872 serial_outp(up, UART_EFR, cflag & CRTSCTS ? UART_EFR_CTS :0);
873 }
874 serial_outp(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
875 serial_outp(up, UART_DLL, quot & 0xff); /* LS of divisor */
876 serial_outp(up, UART_DLM, quot >> 8); /* MS of divisor */
877 if (up->port.type == PORT_16750)
878 serial_outp(up, UART_FCR, fcr); /* set fcr */
879 serial_outp(up, UART_LCR, cval); /* reset DLAB */
880 up->lcr = cval; /* Save LCR */
881 if (up->port.type != PORT_16750) {
882 if (fcr & UART_FCR_ENABLE_FIFO) {
883 /* emulated UARTs (Lucent Venus 167x) need two steps */
884 serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
885 }
886 serial_outp(up, UART_FCR, fcr); /* set fcr */
887 }
888
889 up->cflag = cflag;
890
891 spin_unlock_irqrestore(&up->port.lock, flags);
892 }
893
894 static void
895 sunsu_set_termios(struct uart_port *port, struct ktermios *termios,
896 struct ktermios *old)
897 {
898 unsigned int baud, quot;
899
900 /*
901 * Ask the core to calculate the divisor for us.
902 */
903 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
904 quot = uart_get_divisor(port, baud);
905
906 sunsu_change_speed(port, termios->c_cflag, termios->c_iflag, quot);
907 }
908
909 static void sunsu_release_port(struct uart_port *port)
910 {
911 }
912
913 static int sunsu_request_port(struct uart_port *port)
914 {
915 return 0;
916 }
917
918 static void sunsu_config_port(struct uart_port *port, int flags)
919 {
920 struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
921
922 if (flags & UART_CONFIG_TYPE) {
923 /*
924 * We are supposed to call autoconfig here, but this requires
925 * splitting all the OBP probing crap from the UART probing.
926 * We'll do it when we kill sunsu.c altogether.
927 */
928 port->type = up->type_probed; /* XXX */
929 }
930 }
931
932 static int
933 sunsu_verify_port(struct uart_port *port, struct serial_struct *ser)
934 {
935 return -EINVAL;
936 }
937
938 static const char *
939 sunsu_type(struct uart_port *port)
940 {
941 int type = port->type;
942
943 if (type >= ARRAY_SIZE(uart_config))
944 type = 0;
945 return uart_config[type].name;
946 }
947
948 static struct uart_ops sunsu_pops = {
949 .tx_empty = sunsu_tx_empty,
950 .set_mctrl = sunsu_set_mctrl,
951 .get_mctrl = sunsu_get_mctrl,
952 .stop_tx = sunsu_stop_tx,
953 .start_tx = sunsu_start_tx,
954 .stop_rx = sunsu_stop_rx,
955 .enable_ms = sunsu_enable_ms,
956 .break_ctl = sunsu_break_ctl,
957 .startup = sunsu_startup,
958 .shutdown = sunsu_shutdown,
959 .set_termios = sunsu_set_termios,
960 .type = sunsu_type,
961 .release_port = sunsu_release_port,
962 .request_port = sunsu_request_port,
963 .config_port = sunsu_config_port,
964 .verify_port = sunsu_verify_port,
965 };
966
967 #define UART_NR 4
968
969 static struct uart_sunsu_port sunsu_ports[UART_NR];
970
971 #ifdef CONFIG_SERIO
972
973 static DEFINE_SPINLOCK(sunsu_serio_lock);
974
975 static int sunsu_serio_write(struct serio *serio, unsigned char ch)
976 {
977 struct uart_sunsu_port *up = serio->port_data;
978 unsigned long flags;
979 int lsr;
980
981 spin_lock_irqsave(&sunsu_serio_lock, flags);
982
983 do {
984 lsr = serial_in(up, UART_LSR);
985 } while (!(lsr & UART_LSR_THRE));
986
987 /* Send the character out. */
988 serial_out(up, UART_TX, ch);
989
990 spin_unlock_irqrestore(&sunsu_serio_lock, flags);
991
992 return 0;
993 }
994
995 static int sunsu_serio_open(struct serio *serio)
996 {
997 struct uart_sunsu_port *up = serio->port_data;
998 unsigned long flags;
999 int ret;
1000
1001 spin_lock_irqsave(&sunsu_serio_lock, flags);
1002 if (!up->serio_open) {
1003 up->serio_open = 1;
1004 ret = 0;
1005 } else
1006 ret = -EBUSY;
1007 spin_unlock_irqrestore(&sunsu_serio_lock, flags);
1008
1009 return ret;
1010 }
1011
1012 static void sunsu_serio_close(struct serio *serio)
1013 {
1014 struct uart_sunsu_port *up = serio->port_data;
1015 unsigned long flags;
1016
1017 spin_lock_irqsave(&sunsu_serio_lock, flags);
1018 up->serio_open = 0;
1019 spin_unlock_irqrestore(&sunsu_serio_lock, flags);
1020 }
1021
1022 #endif /* CONFIG_SERIO */
1023
1024 static void sunsu_autoconfig(struct uart_sunsu_port *up)
1025 {
1026 unsigned char status1, status2, scratch, scratch2, scratch3;
1027 unsigned char save_lcr, save_mcr;
1028 unsigned long flags;
1029
1030 if (up->su_type == SU_PORT_NONE)
1031 return;
1032
1033 up->type_probed = PORT_UNKNOWN;
1034 up->port.iotype = UPIO_MEM;
1035
1036 spin_lock_irqsave(&up->port.lock, flags);
1037
1038 if (!(up->port.flags & UPF_BUGGY_UART)) {
1039 /*
1040 * Do a simple existence test first; if we fail this, there's
1041 * no point trying anything else.
1042 *
1043 * 0x80 is used as a nonsense port to prevent against false
1044 * positives due to ISA bus float. The assumption is that
1045 * 0x80 is a non-existent port; which should be safe since
1046 * include/asm/io.h also makes this assumption.
1047 */
1048 scratch = serial_inp(up, UART_IER);
1049 serial_outp(up, UART_IER, 0);
1050 #ifdef __i386__
1051 outb(0xff, 0x080);
1052 #endif
1053 scratch2 = serial_inp(up, UART_IER);
1054 serial_outp(up, UART_IER, 0x0f);
1055 #ifdef __i386__
1056 outb(0, 0x080);
1057 #endif
1058 scratch3 = serial_inp(up, UART_IER);
1059 serial_outp(up, UART_IER, scratch);
1060 if (scratch2 != 0 || scratch3 != 0x0F)
1061 goto out; /* We failed; there's nothing here */
1062 }
1063
1064 save_mcr = serial_in(up, UART_MCR);
1065 save_lcr = serial_in(up, UART_LCR);
1066
1067 /*
1068 * Check to see if a UART is really there. Certain broken
1069 * internal modems based on the Rockwell chipset fail this
1070 * test, because they apparently don't implement the loopback
1071 * test mode. So this test is skipped on the COM 1 through
1072 * COM 4 ports. This *should* be safe, since no board
1073 * manufacturer would be stupid enough to design a board
1074 * that conflicts with COM 1-4 --- we hope!
1075 */
1076 if (!(up->port.flags & UPF_SKIP_TEST)) {
1077 serial_outp(up, UART_MCR, UART_MCR_LOOP | 0x0A);
1078 status1 = serial_inp(up, UART_MSR) & 0xF0;
1079 serial_outp(up, UART_MCR, save_mcr);
1080 if (status1 != 0x90)
1081 goto out; /* We failed loopback test */
1082 }
1083 serial_outp(up, UART_LCR, 0xBF); /* set up for StarTech test */
1084 serial_outp(up, UART_EFR, 0); /* EFR is the same as FCR */
1085 serial_outp(up, UART_LCR, 0);
1086 serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
1087 scratch = serial_in(up, UART_IIR) >> 6;
1088 switch (scratch) {
1089 case 0:
1090 up->port.type = PORT_16450;
1091 break;
1092 case 1:
1093 up->port.type = PORT_UNKNOWN;
1094 break;
1095 case 2:
1096 up->port.type = PORT_16550;
1097 break;
1098 case 3:
1099 up->port.type = PORT_16550A;
1100 break;
1101 }
1102 if (up->port.type == PORT_16550A) {
1103 /* Check for Startech UART's */
1104 serial_outp(up, UART_LCR, UART_LCR_DLAB);
1105 if (serial_in(up, UART_EFR) == 0) {
1106 up->port.type = PORT_16650;
1107 } else {
1108 serial_outp(up, UART_LCR, 0xBF);
1109 if (serial_in(up, UART_EFR) == 0)
1110 up->port.type = PORT_16650V2;
1111 }
1112 }
1113 if (up->port.type == PORT_16550A) {
1114 /* Check for TI 16750 */
1115 serial_outp(up, UART_LCR, save_lcr | UART_LCR_DLAB);
1116 serial_outp(up, UART_FCR,
1117 UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE);
1118 scratch = serial_in(up, UART_IIR) >> 5;
1119 if (scratch == 7) {
1120 /*
1121 * If this is a 16750, and not a cheap UART
1122 * clone, then it should only go into 64 byte
1123 * mode if the UART_FCR7_64BYTE bit was set
1124 * while UART_LCR_DLAB was latched.
1125 */
1126 serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
1127 serial_outp(up, UART_LCR, 0);
1128 serial_outp(up, UART_FCR,
1129 UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE);
1130 scratch = serial_in(up, UART_IIR) >> 5;
1131 if (scratch == 6)
1132 up->port.type = PORT_16750;
1133 }
1134 serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
1135 }
1136 serial_outp(up, UART_LCR, save_lcr);
1137 if (up->port.type == PORT_16450) {
1138 scratch = serial_in(up, UART_SCR);
1139 serial_outp(up, UART_SCR, 0xa5);
1140 status1 = serial_in(up, UART_SCR);
1141 serial_outp(up, UART_SCR, 0x5a);
1142 status2 = serial_in(up, UART_SCR);
1143 serial_outp(up, UART_SCR, scratch);
1144
1145 if ((status1 != 0xa5) || (status2 != 0x5a))
1146 up->port.type = PORT_8250;
1147 }
1148
1149 up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size;
1150
1151 if (up->port.type == PORT_UNKNOWN)
1152 goto out;
1153 up->type_probed = up->port.type; /* XXX */
1154
1155 /*
1156 * Reset the UART.
1157 */
1158 #ifdef CONFIG_SERIAL_8250_RSA
1159 if (up->port.type == PORT_RSA)
1160 serial_outp(up, UART_RSA_FRR, 0);
1161 #endif
1162 serial_outp(up, UART_MCR, save_mcr);
1163 serial_outp(up, UART_FCR, (UART_FCR_ENABLE_FIFO |
1164 UART_FCR_CLEAR_RCVR |
1165 UART_FCR_CLEAR_XMIT));
1166 serial_outp(up, UART_FCR, 0);
1167 (void)serial_in(up, UART_RX);
1168 serial_outp(up, UART_IER, 0);
1169
1170 out:
1171 spin_unlock_irqrestore(&up->port.lock, flags);
1172 }
1173
1174 static struct uart_driver sunsu_reg = {
1175 .owner = THIS_MODULE,
1176 .driver_name = "sunsu",
1177 .dev_name = "ttyS",
1178 .major = TTY_MAJOR,
1179 };
1180
1181 static int __devinit sunsu_kbd_ms_init(struct uart_sunsu_port *up)
1182 {
1183 int quot, baud;
1184 #ifdef CONFIG_SERIO
1185 struct serio *serio;
1186 #endif
1187
1188 if (up->su_type == SU_PORT_KBD) {
1189 up->cflag = B1200 | CS8 | CLOCAL | CREAD;
1190 baud = 1200;
1191 } else {
1192 up->cflag = B4800 | CS8 | CLOCAL | CREAD;
1193 baud = 4800;
1194 }
1195 quot = up->port.uartclk / (16 * baud);
1196
1197 sunsu_autoconfig(up);
1198 if (up->port.type == PORT_UNKNOWN)
1199 return -ENODEV;
1200
1201 printk("%s: %s port at %llx, irq %u\n",
1202 to_of_device(up->port.dev)->node->full_name,
1203 (up->su_type == SU_PORT_KBD) ? "Keyboard" : "Mouse",
1204 (unsigned long long) up->port.mapbase,
1205 up->port.irq);
1206
1207 #ifdef CONFIG_SERIO
1208 serio = &up->serio;
1209 serio->port_data = up;
1210
1211 serio->id.type = SERIO_RS232;
1212 if (up->su_type == SU_PORT_KBD) {
1213 serio->id.proto = SERIO_SUNKBD;
1214 strlcpy(serio->name, "sukbd", sizeof(serio->name));
1215 } else {
1216 serio->id.proto = SERIO_SUN;
1217 serio->id.extra = 1;
1218 strlcpy(serio->name, "sums", sizeof(serio->name));
1219 }
1220 strlcpy(serio->phys,
1221 (!(up->port.line & 1) ? "su/serio0" : "su/serio1"),
1222 sizeof(serio->phys));
1223
1224 serio->write = sunsu_serio_write;
1225 serio->open = sunsu_serio_open;
1226 serio->close = sunsu_serio_close;
1227 serio->dev.parent = up->port.dev;
1228
1229 serio_register_port(serio);
1230 #endif
1231
1232 sunsu_change_speed(&up->port, up->cflag, 0, quot);
1233
1234 sunsu_startup(&up->port);
1235 return 0;
1236 }
1237
1238 /*
1239 * ------------------------------------------------------------
1240 * Serial console driver
1241 * ------------------------------------------------------------
1242 */
1243
1244 #ifdef CONFIG_SERIAL_SUNSU_CONSOLE
1245
1246 #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
1247
1248 /*
1249 * Wait for transmitter & holding register to empty
1250 */
1251 static __inline__ void wait_for_xmitr(struct uart_sunsu_port *up)
1252 {
1253 unsigned int status, tmout = 10000;
1254
1255 /* Wait up to 10ms for the character(s) to be sent. */
1256 do {
1257 status = serial_in(up, UART_LSR);
1258
1259 if (status & UART_LSR_BI)
1260 up->lsr_break_flag = UART_LSR_BI;
1261
1262 if (--tmout == 0)
1263 break;
1264 udelay(1);
1265 } while ((status & BOTH_EMPTY) != BOTH_EMPTY);
1266
1267 /* Wait up to 1s for flow control if necessary */
1268 if (up->port.flags & UPF_CONS_FLOW) {
1269 tmout = 1000000;
1270 while (--tmout &&
1271 ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0))
1272 udelay(1);
1273 }
1274 }
1275
1276 static void sunsu_console_putchar(struct uart_port *port, int ch)
1277 {
1278 struct uart_sunsu_port *up = (struct uart_sunsu_port *)port;
1279
1280 wait_for_xmitr(up);
1281 serial_out(up, UART_TX, ch);
1282 }
1283
1284 /*
1285 * Print a string to the serial port trying not to disturb
1286 * any possible real use of the port...
1287 */
1288 static void sunsu_console_write(struct console *co, const char *s,
1289 unsigned int count)
1290 {
1291 struct uart_sunsu_port *up = &sunsu_ports[co->index];
1292 unsigned long flags;
1293 unsigned int ier;
1294 int locked = 1;
1295
1296 local_irq_save(flags);
1297 if (up->port.sysrq) {
1298 locked = 0;
1299 } else if (oops_in_progress) {
1300 locked = spin_trylock(&up->port.lock);
1301 } else
1302 spin_lock(&up->port.lock);
1303
1304 /*
1305 * First save the UER then disable the interrupts
1306 */
1307 ier = serial_in(up, UART_IER);
1308 serial_out(up, UART_IER, 0);
1309
1310 uart_console_write(&up->port, s, count, sunsu_console_putchar);
1311
1312 /*
1313 * Finally, wait for transmitter to become empty
1314 * and restore the IER
1315 */
1316 wait_for_xmitr(up);
1317 serial_out(up, UART_IER, ier);
1318
1319 if (locked)
1320 spin_unlock(&up->port.lock);
1321 local_irq_restore(flags);
1322 }
1323
1324 /*
1325 * Setup initial baud/bits/parity. We do two things here:
1326 * - construct a cflag setting for the first su_open()
1327 * - initialize the serial port
1328 * Return non-zero if we didn't find a serial port.
1329 */
1330 static int __init sunsu_console_setup(struct console *co, char *options)
1331 {
1332 static struct ktermios dummy;
1333 struct ktermios termios;
1334 struct uart_port *port;
1335
1336 printk("Console: ttyS%d (SU)\n",
1337 (sunsu_reg.minor - 64) + co->index);
1338
1339 /*
1340 * Check whether an invalid uart number has been specified, and
1341 * if so, search for the first available port that does have
1342 * console support.
1343 */
1344 if (co->index >= UART_NR)
1345 co->index = 0;
1346 port = &sunsu_ports[co->index].port;
1347
1348 /*
1349 * Temporary fix.
1350 */
1351 spin_lock_init(&port->lock);
1352
1353 /* Get firmware console settings. */
1354 sunserial_console_termios(co, to_of_device(port->dev)->node);
1355
1356 memset(&termios, 0, sizeof(struct ktermios));
1357 termios.c_cflag = co->cflag;
1358 port->mctrl |= TIOCM_DTR;
1359 port->ops->set_termios(port, &termios, &dummy);
1360
1361 return 0;
1362 }
1363
1364 static struct console sunsu_console = {
1365 .name = "ttyS",
1366 .write = sunsu_console_write,
1367 .device = uart_console_device,
1368 .setup = sunsu_console_setup,
1369 .flags = CON_PRINTBUFFER,
1370 .index = -1,
1371 .data = &sunsu_reg,
1372 };
1373
1374 /*
1375 * Register console.
1376 */
1377
1378 static inline struct console *SUNSU_CONSOLE(void)
1379 {
1380 return &sunsu_console;
1381 }
1382 #else
1383 #define SUNSU_CONSOLE() (NULL)
1384 #define sunsu_serial_console_init() do { } while (0)
1385 #endif
1386
1387 static enum su_type __devinit su_get_type(struct device_node *dp)
1388 {
1389 struct device_node *ap = of_find_node_by_path("/aliases");
1390
1391 if (ap) {
1392 const char *keyb = of_get_property(ap, "keyboard", NULL);
1393 const char *ms = of_get_property(ap, "mouse", NULL);
1394
1395 if (keyb) {
1396 if (dp == of_find_node_by_path(keyb))
1397 return SU_PORT_KBD;
1398 }
1399 if (ms) {
1400 if (dp == of_find_node_by_path(ms))
1401 return SU_PORT_MS;
1402 }
1403 }
1404
1405 return SU_PORT_PORT;
1406 }
1407
1408 static int __devinit su_probe(struct of_device *op, const struct of_device_id *match)
1409 {
1410 static int inst;
1411 struct device_node *dp = op->node;
1412 struct uart_sunsu_port *up;
1413 struct resource *rp;
1414 enum su_type type;
1415 bool ignore_line;
1416 int err;
1417
1418 type = su_get_type(dp);
1419 if (type == SU_PORT_PORT) {
1420 if (inst >= UART_NR)
1421 return -EINVAL;
1422 up = &sunsu_ports[inst];
1423 } else {
1424 up = kzalloc(sizeof(*up), GFP_KERNEL);
1425 if (!up)
1426 return -ENOMEM;
1427 }
1428
1429 up->port.line = inst;
1430
1431 spin_lock_init(&up->port.lock);
1432
1433 up->su_type = type;
1434
1435 rp = &op->resource[0];
1436 up->port.mapbase = rp->start;
1437 up->reg_size = (rp->end - rp->start) + 1;
1438 up->port.membase = of_ioremap(rp, 0, up->reg_size, "su");
1439 if (!up->port.membase) {
1440 if (type != SU_PORT_PORT)
1441 kfree(up);
1442 return -ENOMEM;
1443 }
1444
1445 up->port.irq = op->irqs[0];
1446
1447 up->port.dev = &op->dev;
1448
1449 up->port.type = PORT_UNKNOWN;
1450 up->port.uartclk = (SU_BASE_BAUD * 16);
1451
1452 err = 0;
1453 if (up->su_type == SU_PORT_KBD || up->su_type == SU_PORT_MS) {
1454 err = sunsu_kbd_ms_init(up);
1455 if (err) {
1456 kfree(up);
1457 goto out_unmap;
1458 }
1459 dev_set_drvdata(&op->dev, up);
1460
1461 return 0;
1462 }
1463
1464 up->port.flags |= UPF_BOOT_AUTOCONF;
1465
1466 sunsu_autoconfig(up);
1467
1468 err = -ENODEV;
1469 if (up->port.type == PORT_UNKNOWN)
1470 goto out_unmap;
1471
1472 up->port.ops = &sunsu_pops;
1473
1474 ignore_line = false;
1475 if (!strcmp(dp->name, "rsc-console") ||
1476 !strcmp(dp->name, "lom-console"))
1477 ignore_line = true;
1478
1479 sunserial_console_match(SUNSU_CONSOLE(), dp,
1480 &sunsu_reg, up->port.line,
1481 ignore_line);
1482 err = uart_add_one_port(&sunsu_reg, &up->port);
1483 if (err)
1484 goto out_unmap;
1485
1486 dev_set_drvdata(&op->dev, up);
1487
1488 inst++;
1489
1490 return 0;
1491
1492 out_unmap:
1493 of_iounmap(&op->resource[0], up->port.membase, up->reg_size);
1494 return err;
1495 }
1496
1497 static int __devexit su_remove(struct of_device *op)
1498 {
1499 struct uart_sunsu_port *up = dev_get_drvdata(&op->dev);
1500
1501 if (up->su_type == SU_PORT_MS ||
1502 up->su_type == SU_PORT_KBD) {
1503 #ifdef CONFIG_SERIO
1504 serio_unregister_port(&up->serio);
1505 #endif
1506 kfree(up);
1507 } else if (up->port.type != PORT_UNKNOWN) {
1508 uart_remove_one_port(&sunsu_reg, &up->port);
1509 }
1510
1511 if (up->port.membase)
1512 of_iounmap(&op->resource[0], up->port.membase, up->reg_size);
1513
1514 dev_set_drvdata(&op->dev, NULL);
1515
1516 return 0;
1517 }
1518
1519 static const struct of_device_id su_match[] = {
1520 {
1521 .name = "su",
1522 },
1523 {
1524 .name = "su_pnp",
1525 },
1526 {
1527 .name = "serial",
1528 .compatible = "su",
1529 },
1530 {
1531 .type = "serial",
1532 .compatible = "su",
1533 },
1534 {},
1535 };
1536 MODULE_DEVICE_TABLE(of, su_match);
1537
1538 static struct of_platform_driver su_driver = {
1539 .name = "su",
1540 .match_table = su_match,
1541 .probe = su_probe,
1542 .remove = __devexit_p(su_remove),
1543 };
1544
1545 static int __init sunsu_init(void)
1546 {
1547 struct device_node *dp;
1548 int err;
1549 int num_uart = 0;
1550
1551 for_each_node_by_name(dp, "su") {
1552 if (su_get_type(dp) == SU_PORT_PORT)
1553 num_uart++;
1554 }
1555 for_each_node_by_name(dp, "su_pnp") {
1556 if (su_get_type(dp) == SU_PORT_PORT)
1557 num_uart++;
1558 }
1559 for_each_node_by_name(dp, "serial") {
1560 if (of_device_is_compatible(dp, "su")) {
1561 if (su_get_type(dp) == SU_PORT_PORT)
1562 num_uart++;
1563 }
1564 }
1565 for_each_node_by_type(dp, "serial") {
1566 if (of_device_is_compatible(dp, "su")) {
1567 if (su_get_type(dp) == SU_PORT_PORT)
1568 num_uart++;
1569 }
1570 }
1571
1572 if (num_uart) {
1573 err = sunserial_register_minors(&sunsu_reg, num_uart);
1574 if (err)
1575 return err;
1576 }
1577
1578 err = of_register_driver(&su_driver, &of_bus_type);
1579 if (err && num_uart)
1580 sunserial_unregister_minors(&sunsu_reg, num_uart);
1581
1582 return err;
1583 }
1584
1585 static void __exit sunsu_exit(void)
1586 {
1587 if (sunsu_reg.nr)
1588 sunserial_unregister_minors(&sunsu_reg, sunsu_reg.nr);
1589 }
1590
1591 module_init(sunsu_init);
1592 module_exit(sunsu_exit);
1593
1594 MODULE_AUTHOR("Eddie C. Dost, Peter Zaitcev, and David S. Miller");
1595 MODULE_DESCRIPTION("Sun SU serial port driver");
1596 MODULE_VERSION("2.0");
1597 MODULE_LICENSE("GPL");
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