[SERIAL] uart_port iotype member should use UPIO_*
[linux-2.6.git] / drivers / serial / sunsu.c
1 /* $Id: su.c,v 1.55 2002/01/08 16:00:16 davem Exp $
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@redhat.com), 2002-Jul-29
16  */
17
18 #include <linux/config.h>
19 #include <linux/module.h>
20 #include <linux/kernel.h>
21 #include <linux/sched.h>
22 #include <linux/spinlock.h>
23 #include <linux/errno.h>
24 #include <linux/tty.h>
25 #include <linux/tty_flip.h>
26 #include <linux/major.h>
27 #include <linux/string.h>
28 #include <linux/ptrace.h>
29 #include <linux/ioport.h>
30 #include <linux/circ_buf.h>
31 #include <linux/serial.h>
32 #include <linux/sysrq.h>
33 #include <linux/console.h>
34 #ifdef CONFIG_SERIO
35 #include <linux/serio.h>
36 #endif
37 #include <linux/serial_reg.h>
38 #include <linux/init.h>
39 #include <linux/delay.h>
40
41 #include <asm/io.h>
42 #include <asm/irq.h>
43 #include <asm/oplib.h>
44 #include <asm/ebus.h>
45 #ifdef CONFIG_SPARC64
46 #include <asm/isa.h>
47 #endif
48
49 #if defined(CONFIG_SERIAL_SUNSU_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
50 #define SUPPORT_SYSRQ
51 #endif
52
53 #include <linux/serial_core.h>
54
55 #include "suncore.h"
56
57 /* We are on a NS PC87303 clocked with 24.0 MHz, which results
58  * in a UART clock of 1.8462 MHz.
59  */
60 #define SU_BASE_BAUD    (1846200 / 16)
61
62 enum su_type { SU_PORT_NONE, SU_PORT_MS, SU_PORT_KBD, SU_PORT_PORT };
63 static char *su_typev[] = { "su(???)", "su(mouse)", "su(kbd)", "su(serial)" };
64
65 /*
66  * Here we define the default xmit fifo size used for each type of UART.
67  */
68 static const struct serial_uart_config uart_config[PORT_MAX_8250+1] = {
69         { "unknown",    1,      0 },
70         { "8250",       1,      0 },
71         { "16450",      1,      0 },
72         { "16550",      1,      0 },
73         { "16550A",     16,     UART_CLEAR_FIFO | UART_USE_FIFO },
74         { "Cirrus",     1,      0 },
75         { "ST16650",    1,      UART_CLEAR_FIFO | UART_STARTECH },
76         { "ST16650V2",  32,     UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH },
77         { "TI16750",    64,     UART_CLEAR_FIFO | UART_USE_FIFO },
78         { "Startech",   1,      0 },
79         { "16C950/954", 128,    UART_CLEAR_FIFO | UART_USE_FIFO },
80         { "ST16654",    64,     UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH },
81         { "XR16850",    128,    UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH },
82         { "RSA",        2048,   UART_CLEAR_FIFO | UART_USE_FIFO }
83 };
84
85 struct uart_sunsu_port {
86         struct uart_port        port;
87         unsigned char           acr;
88         unsigned char           ier;
89         unsigned short          rev;
90         unsigned char           lcr;
91         unsigned int            lsr_break_flag;
92         unsigned int            cflag;
93
94         /* Probing information.  */
95         enum su_type            su_type;
96         unsigned int            type_probed;    /* XXX Stupid */
97         int                     port_node;
98
99 #ifdef CONFIG_SERIO
100         struct serio            *serio;
101         int                     serio_open;
102 #endif
103 };
104
105 #define _INLINE_
106
107 static _INLINE_ unsigned int serial_in(struct uart_sunsu_port *up, int offset)
108 {
109         offset <<= up->port.regshift;
110
111         switch (up->port.iotype) {
112         case UPIO_HUB6:
113                 outb(up->port.hub6 - 1 + offset, up->port.iobase);
114                 return inb(up->port.iobase + 1);
115
116         case UPIO_MEM:
117                 return readb(up->port.membase + offset);
118
119         default:
120                 return inb(up->port.iobase + offset);
121         }
122 }
123
124 static _INLINE_ void
125 serial_out(struct uart_sunsu_port *up, int offset, int value)
126 {
127 #ifndef CONFIG_SPARC64
128         /*
129          * MrCoffee has weird schematics: IRQ4 & P10(?) pins of SuperIO are
130          * connected with a gate then go to SlavIO. When IRQ4 goes tristated
131          * gate outputs a logical one. Since we use level triggered interrupts
132          * we have lockup and watchdog reset. We cannot mask IRQ because
133          * keyboard shares IRQ with us (Word has it as Bob Smelik's design).
134          * This problem is similar to what Alpha people suffer, see serial.c.
135          */
136         if (offset == UART_MCR)
137                 value |= UART_MCR_OUT2;
138 #endif
139         offset <<= up->port.regshift;
140
141         switch (up->port.iotype) {
142         case UPIO_HUB6:
143                 outb(up->port.hub6 - 1 + offset, up->port.iobase);
144                 outb(value, up->port.iobase + 1);
145                 break;
146
147         case UPIO_MEM:
148                 writeb(value, up->port.membase + offset);
149                 break;
150
151         default:
152                 outb(value, up->port.iobase + offset);
153         }
154 }
155
156 /*
157  * We used to support using pause I/O for certain machines.  We
158  * haven't supported this for a while, but just in case it's badly
159  * needed for certain old 386 machines, I've left these #define's
160  * in....
161  */
162 #define serial_inp(up, offset)          serial_in(up, offset)
163 #define serial_outp(up, offset, value)  serial_out(up, offset, value)
164
165
166 /*
167  * For the 16C950
168  */
169 static void serial_icr_write(struct uart_sunsu_port *up, int offset, int value)
170 {
171         serial_out(up, UART_SCR, offset);
172         serial_out(up, UART_ICR, value);
173 }
174
175 #if 0 /* Unused currently */
176 static unsigned int serial_icr_read(struct uart_sunsu_port *up, int offset)
177 {
178         unsigned int value;
179
180         serial_icr_write(up, UART_ACR, up->acr | UART_ACR_ICRRD);
181         serial_out(up, UART_SCR, offset);
182         value = serial_in(up, UART_ICR);
183         serial_icr_write(up, UART_ACR, up->acr);
184
185         return value;
186 }
187 #endif
188
189 #ifdef CONFIG_SERIAL_8250_RSA
190 /*
191  * Attempts to turn on the RSA FIFO.  Returns zero on failure.
192  * We set the port uart clock rate if we succeed.
193  */
194 static int __enable_rsa(struct uart_sunsu_port *up)
195 {
196         unsigned char mode;
197         int result;
198
199         mode = serial_inp(up, UART_RSA_MSR);
200         result = mode & UART_RSA_MSR_FIFO;
201
202         if (!result) {
203                 serial_outp(up, UART_RSA_MSR, mode | UART_RSA_MSR_FIFO);
204                 mode = serial_inp(up, UART_RSA_MSR);
205                 result = mode & UART_RSA_MSR_FIFO;
206         }
207
208         if (result)
209                 up->port.uartclk = SERIAL_RSA_BAUD_BASE * 16;
210
211         return result;
212 }
213
214 static void enable_rsa(struct uart_sunsu_port *up)
215 {
216         if (up->port.type == PORT_RSA) {
217                 if (up->port.uartclk != SERIAL_RSA_BAUD_BASE * 16) {
218                         spin_lock_irq(&up->port.lock);
219                         __enable_rsa(up);
220                         spin_unlock_irq(&up->port.lock);
221                 }
222                 if (up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16)
223                         serial_outp(up, UART_RSA_FRR, 0);
224         }
225 }
226
227 /*
228  * Attempts to turn off the RSA FIFO.  Returns zero on failure.
229  * It is unknown why interrupts were disabled in here.  However,
230  * the caller is expected to preserve this behaviour by grabbing
231  * the spinlock before calling this function.
232  */
233 static void disable_rsa(struct uart_sunsu_port *up)
234 {
235         unsigned char mode;
236         int result;
237
238         if (up->port.type == PORT_RSA &&
239             up->port.uartclk == SERIAL_RSA_BAUD_BASE * 16) {
240                 spin_lock_irq(&up->port.lock);
241
242                 mode = serial_inp(up, UART_RSA_MSR);
243                 result = !(mode & UART_RSA_MSR_FIFO);
244
245                 if (!result) {
246                         serial_outp(up, UART_RSA_MSR, mode & ~UART_RSA_MSR_FIFO);
247                         mode = serial_inp(up, UART_RSA_MSR);
248                         result = !(mode & UART_RSA_MSR_FIFO);
249                 }
250
251                 if (result)
252                         up->port.uartclk = SERIAL_RSA_BAUD_BASE_LO * 16;
253                 spin_unlock_irq(&up->port.lock);
254         }
255 }
256 #endif /* CONFIG_SERIAL_8250_RSA */
257
258 static inline void __stop_tx(struct uart_sunsu_port *p)
259 {
260         if (p->ier & UART_IER_THRI) {
261                 p->ier &= ~UART_IER_THRI;
262                 serial_out(p, UART_IER, p->ier);
263         }
264 }
265
266 static void sunsu_stop_tx(struct uart_port *port)
267 {
268         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
269
270         __stop_tx(up);
271
272         /*
273          * We really want to stop the transmitter from sending.
274          */
275         if (up->port.type == PORT_16C950) {
276                 up->acr |= UART_ACR_TXDIS;
277                 serial_icr_write(up, UART_ACR, up->acr);
278         }
279 }
280
281 static void sunsu_start_tx(struct uart_port *port)
282 {
283         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
284
285         if (!(up->ier & UART_IER_THRI)) {
286                 up->ier |= UART_IER_THRI;
287                 serial_out(up, UART_IER, up->ier);
288         }
289
290         /*
291          * Re-enable the transmitter if we disabled it.
292          */
293         if (up->port.type == PORT_16C950 && up->acr & UART_ACR_TXDIS) {
294                 up->acr &= ~UART_ACR_TXDIS;
295                 serial_icr_write(up, UART_ACR, up->acr);
296         }
297 }
298
299 static void sunsu_stop_rx(struct uart_port *port)
300 {
301         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
302         unsigned long flags;
303
304         spin_lock_irqsave(&up->port.lock, flags);
305         up->ier &= ~UART_IER_RLSI;
306         up->port.read_status_mask &= ~UART_LSR_DR;
307         serial_out(up, UART_IER, up->ier);
308         spin_unlock_irqrestore(&up->port.lock, flags);
309 }
310
311 static void sunsu_enable_ms(struct uart_port *port)
312 {
313         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
314         unsigned long flags;
315
316         spin_lock_irqsave(&up->port.lock, flags);
317         up->ier |= UART_IER_MSI;
318         serial_out(up, UART_IER, up->ier);
319         spin_unlock_irqrestore(&up->port.lock, flags);
320 }
321
322 static _INLINE_ struct tty_struct *
323 receive_chars(struct uart_sunsu_port *up, unsigned char *status, struct pt_regs *regs)
324 {
325         struct tty_struct *tty = up->port.info->tty;
326         unsigned char ch, flag;
327         int max_count = 256;
328         int saw_console_brk = 0;
329
330         do {
331                 ch = serial_inp(up, UART_RX);
332                 flag = TTY_NORMAL;
333                 up->port.icount.rx++;
334
335                 if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE |
336                                        UART_LSR_FE | UART_LSR_OE))) {
337                         /*
338                          * For statistics only
339                          */
340                         if (*status & UART_LSR_BI) {
341                                 *status &= ~(UART_LSR_FE | UART_LSR_PE);
342                                 up->port.icount.brk++;
343                                 if (up->port.cons != NULL &&
344                                     up->port.line == up->port.cons->index)
345                                         saw_console_brk = 1;
346                                 /*
347                                  * We do the SysRQ and SAK checking
348                                  * here because otherwise the break
349                                  * may get masked by ignore_status_mask
350                                  * or read_status_mask.
351                                  */
352                                 if (uart_handle_break(&up->port))
353                                         goto ignore_char;
354                         } else if (*status & UART_LSR_PE)
355                                 up->port.icount.parity++;
356                         else if (*status & UART_LSR_FE)
357                                 up->port.icount.frame++;
358                         if (*status & UART_LSR_OE)
359                                 up->port.icount.overrun++;
360
361                         /*
362                          * Mask off conditions which should be ingored.
363                          */
364                         *status &= up->port.read_status_mask;
365
366                         if (up->port.cons != NULL &&
367                             up->port.line == up->port.cons->index) {
368                                 /* Recover the break flag from console xmit */
369                                 *status |= up->lsr_break_flag;
370                                 up->lsr_break_flag = 0;
371                         }
372
373                         if (*status & UART_LSR_BI) {
374                                 flag = TTY_BREAK;
375                         } else if (*status & UART_LSR_PE)
376                                 flag = TTY_PARITY;
377                         else if (*status & UART_LSR_FE)
378                                 flag = TTY_FRAME;
379                 }
380                 if (uart_handle_sysrq_char(&up->port, ch, regs))
381                         goto ignore_char;
382                 if ((*status & up->port.ignore_status_mask) == 0)
383                         tty_insert_flip_char(tty, ch, flag);
384                 if (*status & UART_LSR_OE)
385                         /*
386                          * Overrun is special, since it's reported
387                          * immediately, and doesn't affect the current
388                          * character.
389                          */
390                          tty_insert_flip_char(tty, 0, TTY_OVERRUN);
391         ignore_char:
392                 *status = serial_inp(up, UART_LSR);
393         } while ((*status & UART_LSR_DR) && (max_count-- > 0));
394
395         if (saw_console_brk)
396                 sun_do_break();
397
398         return tty;
399 }
400
401 static _INLINE_ void transmit_chars(struct uart_sunsu_port *up)
402 {
403         struct circ_buf *xmit = &up->port.info->xmit;
404         int count;
405
406         if (up->port.x_char) {
407                 serial_outp(up, UART_TX, up->port.x_char);
408                 up->port.icount.tx++;
409                 up->port.x_char = 0;
410                 return;
411         }
412         if (uart_tx_stopped(&up->port)) {
413                 sunsu_stop_tx(&up->port);
414                 return;
415         }
416         if (uart_circ_empty(xmit)) {
417                 __stop_tx(up);
418                 return;
419         }
420
421         count = up->port.fifosize;
422         do {
423                 serial_out(up, UART_TX, xmit->buf[xmit->tail]);
424                 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
425                 up->port.icount.tx++;
426                 if (uart_circ_empty(xmit))
427                         break;
428         } while (--count > 0);
429
430         if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
431                 uart_write_wakeup(&up->port);
432
433         if (uart_circ_empty(xmit))
434                 __stop_tx(up);
435 }
436
437 static _INLINE_ void check_modem_status(struct uart_sunsu_port *up)
438 {
439         int status;
440
441         status = serial_in(up, UART_MSR);
442
443         if ((status & UART_MSR_ANY_DELTA) == 0)
444                 return;
445
446         if (status & UART_MSR_TERI)
447                 up->port.icount.rng++;
448         if (status & UART_MSR_DDSR)
449                 up->port.icount.dsr++;
450         if (status & UART_MSR_DDCD)
451                 uart_handle_dcd_change(&up->port, status & UART_MSR_DCD);
452         if (status & UART_MSR_DCTS)
453                 uart_handle_cts_change(&up->port, status & UART_MSR_CTS);
454
455         wake_up_interruptible(&up->port.info->delta_msr_wait);
456 }
457
458 static irqreturn_t sunsu_serial_interrupt(int irq, void *dev_id, struct pt_regs *regs)
459 {
460         struct uart_sunsu_port *up = dev_id;
461         unsigned long flags;
462         unsigned char status;
463
464         spin_lock_irqsave(&up->port.lock, flags);
465
466         do {
467                 struct tty_struct *tty;
468
469                 status = serial_inp(up, UART_LSR);
470                 tty = NULL;
471                 if (status & UART_LSR_DR)
472                         tty = receive_chars(up, &status, regs);
473                 check_modem_status(up);
474                 if (status & UART_LSR_THRE)
475                         transmit_chars(up);
476
477                 spin_unlock_irqrestore(&up->port.lock, flags);
478
479                 if (tty)
480                         tty_flip_buffer_push(tty);
481
482                 spin_lock_irqsave(&up->port.lock, flags);
483
484         } while (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT));
485
486         spin_unlock_irqrestore(&up->port.lock, flags);
487
488         return IRQ_HANDLED;
489 }
490
491 /* Separate interrupt handling path for keyboard/mouse ports.  */
492
493 static void
494 sunsu_change_speed(struct uart_port *port, unsigned int cflag,
495                    unsigned int iflag, unsigned int quot);
496
497 static void sunsu_change_mouse_baud(struct uart_sunsu_port *up)
498 {
499         unsigned int cur_cflag = up->cflag;
500         int quot, new_baud;
501
502         up->cflag &= ~CBAUD;
503         up->cflag |= suncore_mouse_baud_cflag_next(cur_cflag, &new_baud);
504
505         quot = up->port.uartclk / (16 * new_baud);
506
507         sunsu_change_speed(&up->port, up->cflag, 0, quot);
508 }
509
510 static void receive_kbd_ms_chars(struct uart_sunsu_port *up, struct pt_regs *regs, int is_break)
511 {
512         do {
513                 unsigned char ch = serial_inp(up, UART_RX);
514
515                 /* Stop-A is handled by drivers/char/keyboard.c now. */
516                 if (up->su_type == SU_PORT_KBD) {
517 #ifdef CONFIG_SERIO
518                         serio_interrupt(up->serio, ch, 0, regs);
519 #endif
520                 } else if (up->su_type == SU_PORT_MS) {
521                         int ret = suncore_mouse_baud_detection(ch, is_break);
522
523                         switch (ret) {
524                         case 2:
525                                 sunsu_change_mouse_baud(up);
526                                 /* fallthru */
527                         case 1:
528                                 break;
529
530                         case 0:
531 #ifdef CONFIG_SERIO
532                                 serio_interrupt(up->serio, ch, 0, regs);
533 #endif
534                                 break;
535                         };
536                 }
537         } while (serial_in(up, UART_LSR) & UART_LSR_DR);
538 }
539
540 static irqreturn_t sunsu_kbd_ms_interrupt(int irq, void *dev_id, struct pt_regs *regs)
541 {
542         struct uart_sunsu_port *up = dev_id;
543
544         if (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT)) {
545                 unsigned char status = serial_inp(up, UART_LSR);
546
547                 if ((status & UART_LSR_DR) || (status & UART_LSR_BI))
548                         receive_kbd_ms_chars(up, regs,
549                                              (status & UART_LSR_BI) != 0);
550         }
551
552         return IRQ_HANDLED;
553 }
554
555 static unsigned int sunsu_tx_empty(struct uart_port *port)
556 {
557         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
558         unsigned long flags;
559         unsigned int ret;
560
561         spin_lock_irqsave(&up->port.lock, flags);
562         ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
563         spin_unlock_irqrestore(&up->port.lock, flags);
564
565         return ret;
566 }
567
568 static unsigned int sunsu_get_mctrl(struct uart_port *port)
569 {
570         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
571         unsigned char status;
572         unsigned int ret;
573
574         status = serial_in(up, UART_MSR);
575
576         ret = 0;
577         if (status & UART_MSR_DCD)
578                 ret |= TIOCM_CAR;
579         if (status & UART_MSR_RI)
580                 ret |= TIOCM_RNG;
581         if (status & UART_MSR_DSR)
582                 ret |= TIOCM_DSR;
583         if (status & UART_MSR_CTS)
584                 ret |= TIOCM_CTS;
585         return ret;
586 }
587
588 static void sunsu_set_mctrl(struct uart_port *port, unsigned int mctrl)
589 {
590         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
591         unsigned char mcr = 0;
592
593         if (mctrl & TIOCM_RTS)
594                 mcr |= UART_MCR_RTS;
595         if (mctrl & TIOCM_DTR)
596                 mcr |= UART_MCR_DTR;
597         if (mctrl & TIOCM_OUT1)
598                 mcr |= UART_MCR_OUT1;
599         if (mctrl & TIOCM_OUT2)
600                 mcr |= UART_MCR_OUT2;
601         if (mctrl & TIOCM_LOOP)
602                 mcr |= UART_MCR_LOOP;
603
604         serial_out(up, UART_MCR, mcr);
605 }
606
607 static void sunsu_break_ctl(struct uart_port *port, int break_state)
608 {
609         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
610         unsigned long flags;
611
612         spin_lock_irqsave(&up->port.lock, flags);
613         if (break_state == -1)
614                 up->lcr |= UART_LCR_SBC;
615         else
616                 up->lcr &= ~UART_LCR_SBC;
617         serial_out(up, UART_LCR, up->lcr);
618         spin_unlock_irqrestore(&up->port.lock, flags);
619 }
620
621 static int sunsu_startup(struct uart_port *port)
622 {
623         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
624         unsigned long flags;
625         int retval;
626
627         if (up->port.type == PORT_16C950) {
628                 /* Wake up and initialize UART */
629                 up->acr = 0;
630                 serial_outp(up, UART_LCR, 0xBF);
631                 serial_outp(up, UART_EFR, UART_EFR_ECB);
632                 serial_outp(up, UART_IER, 0);
633                 serial_outp(up, UART_LCR, 0);
634                 serial_icr_write(up, UART_CSR, 0); /* Reset the UART */
635                 serial_outp(up, UART_LCR, 0xBF);
636                 serial_outp(up, UART_EFR, UART_EFR_ECB);
637                 serial_outp(up, UART_LCR, 0);
638         }
639
640 #ifdef CONFIG_SERIAL_8250_RSA
641         /*
642          * If this is an RSA port, see if we can kick it up to the
643          * higher speed clock.
644          */
645         enable_rsa(up);
646 #endif
647
648         /*
649          * Clear the FIFO buffers and disable them.
650          * (they will be reeanbled in set_termios())
651          */
652         if (uart_config[up->port.type].flags & UART_CLEAR_FIFO) {
653                 serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
654                 serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO |
655                                 UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
656                 serial_outp(up, UART_FCR, 0);
657         }
658
659         /*
660          * Clear the interrupt registers.
661          */
662         (void) serial_inp(up, UART_LSR);
663         (void) serial_inp(up, UART_RX);
664         (void) serial_inp(up, UART_IIR);
665         (void) serial_inp(up, UART_MSR);
666
667         /*
668          * At this point, there's no way the LSR could still be 0xff;
669          * if it is, then bail out, because there's likely no UART
670          * here.
671          */
672         if (!(up->port.flags & UPF_BUGGY_UART) &&
673             (serial_inp(up, UART_LSR) == 0xff)) {
674                 printk("ttyS%d: LSR safety check engaged!\n", up->port.line);
675                 return -ENODEV;
676         }
677
678         if (up->su_type != SU_PORT_PORT) {
679                 retval = request_irq(up->port.irq, sunsu_kbd_ms_interrupt,
680                                      SA_SHIRQ, su_typev[up->su_type], up);
681         } else {
682                 retval = request_irq(up->port.irq, sunsu_serial_interrupt,
683                                      SA_SHIRQ, su_typev[up->su_type], up);
684         }
685         if (retval) {
686                 printk("su: Cannot register IRQ %d\n", up->port.irq);
687                 return retval;
688         }
689
690         /*
691          * Now, initialize the UART
692          */
693         serial_outp(up, UART_LCR, UART_LCR_WLEN8);
694
695         spin_lock_irqsave(&up->port.lock, flags);
696
697         up->port.mctrl |= TIOCM_OUT2;
698
699         sunsu_set_mctrl(&up->port, up->port.mctrl);
700         spin_unlock_irqrestore(&up->port.lock, flags);
701
702         /*
703          * Finally, enable interrupts.  Note: Modem status interrupts
704          * are set via set_termios(), which will be occurring imminently
705          * anyway, so we don't enable them here.
706          */
707         up->ier = UART_IER_RLSI | UART_IER_RDI;
708         serial_outp(up, UART_IER, up->ier);
709
710         if (up->port.flags & UPF_FOURPORT) {
711                 unsigned int icp;
712                 /*
713                  * Enable interrupts on the AST Fourport board
714                  */
715                 icp = (up->port.iobase & 0xfe0) | 0x01f;
716                 outb_p(0x80, icp);
717                 (void) inb_p(icp);
718         }
719
720         /*
721          * And clear the interrupt registers again for luck.
722          */
723         (void) serial_inp(up, UART_LSR);
724         (void) serial_inp(up, UART_RX);
725         (void) serial_inp(up, UART_IIR);
726         (void) serial_inp(up, UART_MSR);
727
728         return 0;
729 }
730
731 static void sunsu_shutdown(struct uart_port *port)
732 {
733         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
734         unsigned long flags;
735
736         /*
737          * Disable interrupts from this port
738          */
739         up->ier = 0;
740         serial_outp(up, UART_IER, 0);
741
742         spin_lock_irqsave(&up->port.lock, flags);
743         if (up->port.flags & UPF_FOURPORT) {
744                 /* reset interrupts on the AST Fourport board */
745                 inb((up->port.iobase & 0xfe0) | 0x1f);
746                 up->port.mctrl |= TIOCM_OUT1;
747         } else
748                 up->port.mctrl &= ~TIOCM_OUT2;
749
750         sunsu_set_mctrl(&up->port, up->port.mctrl);
751         spin_unlock_irqrestore(&up->port.lock, flags);
752
753         /*
754          * Disable break condition and FIFOs
755          */
756         serial_out(up, UART_LCR, serial_inp(up, UART_LCR) & ~UART_LCR_SBC);
757         serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO |
758                                   UART_FCR_CLEAR_RCVR |
759                                   UART_FCR_CLEAR_XMIT);
760         serial_outp(up, UART_FCR, 0);
761
762 #ifdef CONFIG_SERIAL_8250_RSA
763         /*
764          * Reset the RSA board back to 115kbps compat mode.
765          */
766         disable_rsa(up);
767 #endif
768
769         /*
770          * Read data port to reset things.
771          */
772         (void) serial_in(up, UART_RX);
773
774         free_irq(up->port.irq, up);
775 }
776
777 static void
778 sunsu_change_speed(struct uart_port *port, unsigned int cflag,
779                    unsigned int iflag, unsigned int quot)
780 {
781         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
782         unsigned char cval, fcr = 0;
783         unsigned long flags;
784
785         switch (cflag & CSIZE) {
786         case CS5:
787                 cval = 0x00;
788                 break;
789         case CS6:
790                 cval = 0x01;
791                 break;
792         case CS7:
793                 cval = 0x02;
794                 break;
795         default:
796         case CS8:
797                 cval = 0x03;
798                 break;
799         }
800
801         if (cflag & CSTOPB)
802                 cval |= 0x04;
803         if (cflag & PARENB)
804                 cval |= UART_LCR_PARITY;
805         if (!(cflag & PARODD))
806                 cval |= UART_LCR_EPAR;
807 #ifdef CMSPAR
808         if (cflag & CMSPAR)
809                 cval |= UART_LCR_SPAR;
810 #endif
811
812         /*
813          * Work around a bug in the Oxford Semiconductor 952 rev B
814          * chip which causes it to seriously miscalculate baud rates
815          * when DLL is 0.
816          */
817         if ((quot & 0xff) == 0 && up->port.type == PORT_16C950 &&
818             up->rev == 0x5201)
819                 quot ++;
820
821         if (uart_config[up->port.type].flags & UART_USE_FIFO) {
822                 if ((up->port.uartclk / quot) < (2400 * 16))
823                         fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
824 #ifdef CONFIG_SERIAL_8250_RSA
825                 else if (up->port.type == PORT_RSA)
826                         fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_14;
827 #endif
828                 else
829                         fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8;
830         }
831         if (up->port.type == PORT_16750)
832                 fcr |= UART_FCR7_64BYTE;
833
834         /*
835          * Ok, we're now changing the port state.  Do it with
836          * interrupts disabled.
837          */
838         spin_lock_irqsave(&up->port.lock, flags);
839
840         /*
841          * Update the per-port timeout.
842          */
843         uart_update_timeout(port, cflag, (port->uartclk / (16 * quot)));
844
845         up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
846         if (iflag & INPCK)
847                 up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
848         if (iflag & (BRKINT | PARMRK))
849                 up->port.read_status_mask |= UART_LSR_BI;
850
851         /*
852          * Characteres to ignore
853          */
854         up->port.ignore_status_mask = 0;
855         if (iflag & IGNPAR)
856                 up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
857         if (iflag & IGNBRK) {
858                 up->port.ignore_status_mask |= UART_LSR_BI;
859                 /*
860                  * If we're ignoring parity and break indicators,
861                  * ignore overruns too (for real raw support).
862                  */
863                 if (iflag & IGNPAR)
864                         up->port.ignore_status_mask |= UART_LSR_OE;
865         }
866
867         /*
868          * ignore all characters if CREAD is not set
869          */
870         if ((cflag & CREAD) == 0)
871                 up->port.ignore_status_mask |= UART_LSR_DR;
872
873         /*
874          * CTS flow control flag and modem status interrupts
875          */
876         up->ier &= ~UART_IER_MSI;
877         if (UART_ENABLE_MS(&up->port, cflag))
878                 up->ier |= UART_IER_MSI;
879
880         serial_out(up, UART_IER, up->ier);
881
882         if (uart_config[up->port.type].flags & UART_STARTECH) {
883                 serial_outp(up, UART_LCR, 0xBF);
884                 serial_outp(up, UART_EFR, cflag & CRTSCTS ? UART_EFR_CTS :0);
885         }
886         serial_outp(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
887         serial_outp(up, UART_DLL, quot & 0xff);         /* LS of divisor */
888         serial_outp(up, UART_DLM, quot >> 8);           /* MS of divisor */
889         if (up->port.type == PORT_16750)
890                 serial_outp(up, UART_FCR, fcr);         /* set fcr */
891         serial_outp(up, UART_LCR, cval);                /* reset DLAB */
892         up->lcr = cval;                                 /* Save LCR */
893         if (up->port.type != PORT_16750) {
894                 if (fcr & UART_FCR_ENABLE_FIFO) {
895                         /* emulated UARTs (Lucent Venus 167x) need two steps */
896                         serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
897                 }
898                 serial_outp(up, UART_FCR, fcr);         /* set fcr */
899         }
900
901         up->cflag = cflag;
902
903         spin_unlock_irqrestore(&up->port.lock, flags);
904 }
905
906 static void
907 sunsu_set_termios(struct uart_port *port, struct termios *termios,
908                   struct termios *old)
909 {
910         unsigned int baud, quot;
911
912         /*
913          * Ask the core to calculate the divisor for us.
914          */
915         baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); 
916         quot = uart_get_divisor(port, baud);
917
918         sunsu_change_speed(port, termios->c_cflag, termios->c_iflag, quot);
919 }
920
921 static void sunsu_release_port(struct uart_port *port)
922 {
923 }
924
925 static int sunsu_request_port(struct uart_port *port)
926 {
927         return 0;
928 }
929
930 static void sunsu_config_port(struct uart_port *port, int flags)
931 {
932         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
933
934         if (flags & UART_CONFIG_TYPE) {
935                 /*
936                  * We are supposed to call autoconfig here, but this requires
937                  * splitting all the OBP probing crap from the UART probing.
938                  * We'll do it when we kill sunsu.c altogether.
939                  */
940                 port->type = up->type_probed;   /* XXX */
941         }
942 }
943
944 static int
945 sunsu_verify_port(struct uart_port *port, struct serial_struct *ser)
946 {
947         return -EINVAL;
948 }
949
950 static const char *
951 sunsu_type(struct uart_port *port)
952 {
953         int type = port->type;
954
955         if (type >= ARRAY_SIZE(uart_config))
956                 type = 0;
957         return uart_config[type].name;
958 }
959
960 static struct uart_ops sunsu_pops = {
961         .tx_empty       = sunsu_tx_empty,
962         .set_mctrl      = sunsu_set_mctrl,
963         .get_mctrl      = sunsu_get_mctrl,
964         .stop_tx        = sunsu_stop_tx,
965         .start_tx       = sunsu_start_tx,
966         .stop_rx        = sunsu_stop_rx,
967         .enable_ms      = sunsu_enable_ms,
968         .break_ctl      = sunsu_break_ctl,
969         .startup        = sunsu_startup,
970         .shutdown       = sunsu_shutdown,
971         .set_termios    = sunsu_set_termios,
972         .type           = sunsu_type,
973         .release_port   = sunsu_release_port,
974         .request_port   = sunsu_request_port,
975         .config_port    = sunsu_config_port,
976         .verify_port    = sunsu_verify_port,
977 };
978
979 #define UART_NR 4
980
981 static struct uart_sunsu_port sunsu_ports[UART_NR];
982
983 #ifdef CONFIG_SERIO
984
985 static DEFINE_SPINLOCK(sunsu_serio_lock);
986
987 static int sunsu_serio_write(struct serio *serio, unsigned char ch)
988 {
989         struct uart_sunsu_port *up = serio->port_data;
990         unsigned long flags;
991         int lsr;
992
993         spin_lock_irqsave(&sunsu_serio_lock, flags);
994
995         do {
996                 lsr = serial_in(up, UART_LSR);
997         } while (!(lsr & UART_LSR_THRE));
998
999         /* Send the character out. */
1000         serial_out(up, UART_TX, ch);
1001
1002         spin_unlock_irqrestore(&sunsu_serio_lock, flags);
1003
1004         return 0;
1005 }
1006
1007 static int sunsu_serio_open(struct serio *serio)
1008 {
1009         struct uart_sunsu_port *up = serio->port_data;
1010         unsigned long flags;
1011         int ret;
1012
1013         spin_lock_irqsave(&sunsu_serio_lock, flags);
1014         if (!up->serio_open) {
1015                 up->serio_open = 1;
1016                 ret = 0;
1017         } else
1018                 ret = -EBUSY;
1019         spin_unlock_irqrestore(&sunsu_serio_lock, flags);
1020
1021         return ret;
1022 }
1023
1024 static void sunsu_serio_close(struct serio *serio)
1025 {
1026         struct uart_sunsu_port *up = serio->port_data;
1027         unsigned long flags;
1028
1029         spin_lock_irqsave(&sunsu_serio_lock, flags);
1030         up->serio_open = 0;
1031         spin_unlock_irqrestore(&sunsu_serio_lock, flags);
1032 }
1033
1034 #endif /* CONFIG_SERIO */
1035
1036 static void sunsu_autoconfig(struct uart_sunsu_port *up)
1037 {
1038         unsigned char status1, status2, scratch, scratch2, scratch3;
1039         unsigned char save_lcr, save_mcr;
1040         struct linux_ebus_device *dev = NULL;
1041         struct linux_ebus *ebus;
1042 #ifdef CONFIG_SPARC64
1043         struct sparc_isa_bridge *isa_br;
1044         struct sparc_isa_device *isa_dev;
1045 #endif
1046 #ifndef CONFIG_SPARC64
1047         struct linux_prom_registers reg0;
1048 #endif
1049         unsigned long flags;
1050
1051         if (!up->port_node || !up->su_type)
1052                 return;
1053
1054         up->type_probed = PORT_UNKNOWN;
1055         up->port.iotype = UPIO_MEM;
1056
1057         /*
1058          * First we look for Ebus-bases su's
1059          */
1060         for_each_ebus(ebus) {
1061                 for_each_ebusdev(dev, ebus) {
1062                         if (dev->prom_node == up->port_node) {
1063                                 /*
1064                                  * The EBus is broken on sparc; it delivers
1065                                  * virtual addresses in resources. Oh well...
1066                                  * This is correct on sparc64, though.
1067                                  */
1068                                 up->port.membase = (char *) dev->resource[0].start;
1069                                 /*
1070                                  * This is correct on both architectures.
1071                                  */
1072                                 up->port.mapbase = dev->resource[0].start;
1073                                 up->port.irq = dev->irqs[0];
1074                                 goto ebus_done;
1075                         }
1076                 }
1077         }
1078
1079 #ifdef CONFIG_SPARC64
1080         for_each_isa(isa_br) {
1081                 for_each_isadev(isa_dev, isa_br) {
1082                         if (isa_dev->prom_node == up->port_node) {
1083                                 /* Same on sparc64. Cool architecure... */
1084                                 up->port.membase = (char *) isa_dev->resource.start;
1085                                 up->port.mapbase = isa_dev->resource.start;
1086                                 up->port.irq = isa_dev->irq;
1087                                 goto ebus_done;
1088                         }
1089                 }
1090         }
1091 #endif
1092
1093 #ifdef CONFIG_SPARC64
1094         /*
1095          * Not on Ebus, bailing.
1096          */
1097         return;
1098 #else
1099         /*
1100          * Not on Ebus, must be OBIO.
1101          */
1102         if (prom_getproperty(up->port_node, "reg",
1103                              (char *)&reg0, sizeof(reg0)) == -1) {
1104                 prom_printf("sunsu: no \"reg\" property\n");
1105                 return;
1106         }
1107         prom_apply_obio_ranges(&reg0, 1);
1108         if (reg0.which_io != 0) {       /* Just in case... */
1109                 prom_printf("sunsu: bus number nonzero: 0x%x:%x\n",
1110                     reg0.which_io, reg0.phys_addr);
1111                 return;
1112         }
1113         up->port.mapbase = reg0.phys_addr;
1114         if ((up->port.membase = ioremap(reg0.phys_addr, reg0.reg_size)) == 0) {
1115                 prom_printf("sunsu: Cannot map registers.\n");
1116                 return;
1117         }
1118
1119         /*
1120          * 0x20 is sun4m thing, Dave Redman heritage.
1121          * See arch/sparc/kernel/irq.c.
1122          */
1123 #define IRQ_4M(n)       ((n)|0x20)
1124
1125         /*
1126          * There is no intr property on MrCoffee, so hardwire it.
1127          */
1128         up->port.irq = IRQ_4M(13);
1129 #endif
1130
1131 ebus_done:
1132
1133         spin_lock_irqsave(&up->port.lock, flags);
1134
1135         if (!(up->port.flags & UPF_BUGGY_UART)) {
1136                 /*
1137                  * Do a simple existence test first; if we fail this, there's
1138                  * no point trying anything else.
1139                  *
1140                  * 0x80 is used as a nonsense port to prevent against false
1141                  * positives due to ISA bus float.  The assumption is that
1142                  * 0x80 is a non-existent port; which should be safe since
1143                  * include/asm/io.h also makes this assumption.
1144                  */
1145                 scratch = serial_inp(up, UART_IER);
1146                 serial_outp(up, UART_IER, 0);
1147 #ifdef __i386__
1148                 outb(0xff, 0x080);
1149 #endif
1150                 scratch2 = serial_inp(up, UART_IER);
1151                 serial_outp(up, UART_IER, 0x0f);
1152 #ifdef __i386__
1153                 outb(0, 0x080);
1154 #endif
1155                 scratch3 = serial_inp(up, UART_IER);
1156                 serial_outp(up, UART_IER, scratch);
1157                 if (scratch2 != 0 || scratch3 != 0x0F)
1158                         goto out;       /* We failed; there's nothing here */
1159         }
1160
1161         save_mcr = serial_in(up, UART_MCR);
1162         save_lcr = serial_in(up, UART_LCR);
1163
1164         /* 
1165          * Check to see if a UART is really there.  Certain broken
1166          * internal modems based on the Rockwell chipset fail this
1167          * test, because they apparently don't implement the loopback
1168          * test mode.  So this test is skipped on the COM 1 through
1169          * COM 4 ports.  This *should* be safe, since no board
1170          * manufacturer would be stupid enough to design a board
1171          * that conflicts with COM 1-4 --- we hope!
1172          */
1173         if (!(up->port.flags & UPF_SKIP_TEST)) {
1174                 serial_outp(up, UART_MCR, UART_MCR_LOOP | 0x0A);
1175                 status1 = serial_inp(up, UART_MSR) & 0xF0;
1176                 serial_outp(up, UART_MCR, save_mcr);
1177                 if (status1 != 0x90)
1178                         goto out;       /* We failed loopback test */
1179         }
1180         serial_outp(up, UART_LCR, 0xBF);        /* set up for StarTech test */
1181         serial_outp(up, UART_EFR, 0);           /* EFR is the same as FCR */
1182         serial_outp(up, UART_LCR, 0);
1183         serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
1184         scratch = serial_in(up, UART_IIR) >> 6;
1185         switch (scratch) {
1186                 case 0:
1187                         up->port.type = PORT_16450;
1188                         break;
1189                 case 1:
1190                         up->port.type = PORT_UNKNOWN;
1191                         break;
1192                 case 2:
1193                         up->port.type = PORT_16550;
1194                         break;
1195                 case 3:
1196                         up->port.type = PORT_16550A;
1197                         break;
1198         }
1199         if (up->port.type == PORT_16550A) {
1200                 /* Check for Startech UART's */
1201                 serial_outp(up, UART_LCR, UART_LCR_DLAB);
1202                 if (serial_in(up, UART_EFR) == 0) {
1203                         up->port.type = PORT_16650;
1204                 } else {
1205                         serial_outp(up, UART_LCR, 0xBF);
1206                         if (serial_in(up, UART_EFR) == 0)
1207                                 up->port.type = PORT_16650V2;
1208                 }
1209         }
1210         if (up->port.type == PORT_16550A) {
1211                 /* Check for TI 16750 */
1212                 serial_outp(up, UART_LCR, save_lcr | UART_LCR_DLAB);
1213                 serial_outp(up, UART_FCR,
1214                             UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE);
1215                 scratch = serial_in(up, UART_IIR) >> 5;
1216                 if (scratch == 7) {
1217                         /*
1218                          * If this is a 16750, and not a cheap UART
1219                          * clone, then it should only go into 64 byte
1220                          * mode if the UART_FCR7_64BYTE bit was set
1221                          * while UART_LCR_DLAB was latched.
1222                          */
1223                         serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
1224                         serial_outp(up, UART_LCR, 0);
1225                         serial_outp(up, UART_FCR,
1226                                     UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE);
1227                         scratch = serial_in(up, UART_IIR) >> 5;
1228                         if (scratch == 6)
1229                                 up->port.type = PORT_16750;
1230                 }
1231                 serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
1232         }
1233         serial_outp(up, UART_LCR, save_lcr);
1234         if (up->port.type == PORT_16450) {
1235                 scratch = serial_in(up, UART_SCR);
1236                 serial_outp(up, UART_SCR, 0xa5);
1237                 status1 = serial_in(up, UART_SCR);
1238                 serial_outp(up, UART_SCR, 0x5a);
1239                 status2 = serial_in(up, UART_SCR);
1240                 serial_outp(up, UART_SCR, scratch);
1241
1242                 if ((status1 != 0xa5) || (status2 != 0x5a))
1243                         up->port.type = PORT_8250;
1244         }
1245
1246         up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size;
1247
1248         if (up->port.type == PORT_UNKNOWN)
1249                 goto out;
1250         up->type_probed = up->port.type;        /* XXX */
1251
1252         /*
1253          * Reset the UART.
1254          */
1255 #ifdef CONFIG_SERIAL_8250_RSA
1256         if (up->port.type == PORT_RSA)
1257                 serial_outp(up, UART_RSA_FRR, 0);
1258 #endif
1259         serial_outp(up, UART_MCR, save_mcr);
1260         serial_outp(up, UART_FCR, (UART_FCR_ENABLE_FIFO |
1261                                      UART_FCR_CLEAR_RCVR |
1262                                      UART_FCR_CLEAR_XMIT));
1263         serial_outp(up, UART_FCR, 0);
1264         (void)serial_in(up, UART_RX);
1265         serial_outp(up, UART_IER, 0);
1266
1267 out:
1268         spin_unlock_irqrestore(&up->port.lock, flags);
1269 }
1270
1271 static struct uart_driver sunsu_reg = {
1272         .owner                  = THIS_MODULE,
1273         .driver_name            = "serial",
1274         .devfs_name             = "tts/",
1275         .dev_name               = "ttyS",
1276         .major                  = TTY_MAJOR,
1277 };
1278
1279 static int __init sunsu_kbd_ms_init(struct uart_sunsu_port *up, int channel)
1280 {
1281         int quot, baud;
1282 #ifdef CONFIG_SERIO
1283         struct serio *serio;
1284 #endif
1285
1286         up->port.line = channel;
1287         up->port.type = PORT_UNKNOWN;
1288         up->port.uartclk = (SU_BASE_BAUD * 16);
1289
1290         if (up->su_type == SU_PORT_KBD) {
1291                 up->cflag = B1200 | CS8 | CLOCAL | CREAD;
1292                 baud = 1200;
1293         } else {
1294                 up->cflag = B4800 | CS8 | CLOCAL | CREAD;
1295                 baud = 4800;
1296         }
1297         quot = up->port.uartclk / (16 * baud);
1298
1299         sunsu_autoconfig(up);
1300         if (up->port.type == PORT_UNKNOWN)
1301                 return -1;
1302
1303         printk(KERN_INFO "su%d at 0x%p (irq = %s) is a %s\n",
1304                channel,
1305                up->port.membase, __irq_itoa(up->port.irq),
1306                sunsu_type(&up->port));
1307
1308 #ifdef CONFIG_SERIO
1309         up->serio = serio = kmalloc(sizeof(struct serio), GFP_KERNEL);
1310         if (serio) {
1311                 memset(serio, 0, sizeof(*serio));
1312
1313                 serio->port_data = up;
1314
1315                 serio->id.type = SERIO_RS232;
1316                 if (up->su_type == SU_PORT_KBD) {
1317                         serio->id.proto = SERIO_SUNKBD;
1318                         strlcpy(serio->name, "sukbd", sizeof(serio->name));
1319                 } else {
1320                         serio->id.proto = SERIO_SUN;
1321                         serio->id.extra = 1;
1322                         strlcpy(serio->name, "sums", sizeof(serio->name));
1323                 }
1324                 strlcpy(serio->phys, (channel == 0 ? "su/serio0" : "su/serio1"),
1325                         sizeof(serio->phys));
1326
1327                 serio->write = sunsu_serio_write;
1328                 serio->open = sunsu_serio_open;
1329                 serio->close = sunsu_serio_close;
1330
1331                 serio_register_port(serio);
1332         } else {
1333                 printk(KERN_WARNING "su%d: not enough memory for serio port\n",
1334                         channel);
1335         }
1336 #endif
1337
1338         sunsu_change_speed(&up->port, up->cflag, 0, quot);
1339
1340         sunsu_startup(&up->port);
1341         return 0;
1342 }
1343
1344 /*
1345  * ------------------------------------------------------------
1346  * Serial console driver
1347  * ------------------------------------------------------------
1348  */
1349
1350 #ifdef CONFIG_SERIAL_SUNSU_CONSOLE
1351
1352 #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
1353
1354 /*
1355  *      Wait for transmitter & holding register to empty
1356  */
1357 static __inline__ void wait_for_xmitr(struct uart_sunsu_port *up)
1358 {
1359         unsigned int status, tmout = 10000;
1360
1361         /* Wait up to 10ms for the character(s) to be sent. */
1362         do {
1363                 status = serial_in(up, UART_LSR);
1364
1365                 if (status & UART_LSR_BI)
1366                         up->lsr_break_flag = UART_LSR_BI;
1367
1368                 if (--tmout == 0)
1369                         break;
1370                 udelay(1);
1371         } while ((status & BOTH_EMPTY) != BOTH_EMPTY);
1372
1373         /* Wait up to 1s for flow control if necessary */
1374         if (up->port.flags & UPF_CONS_FLOW) {
1375                 tmout = 1000000;
1376                 while (--tmout &&
1377                        ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0))
1378                         udelay(1);
1379         }
1380 }
1381
1382 /*
1383  *      Print a string to the serial port trying not to disturb
1384  *      any possible real use of the port...
1385  */
1386 static void sunsu_console_write(struct console *co, const char *s,
1387                                 unsigned int count)
1388 {
1389         struct uart_sunsu_port *up = &sunsu_ports[co->index];
1390         unsigned int ier;
1391         int i;
1392
1393         /*
1394          *      First save the UER then disable the interrupts
1395          */
1396         ier = serial_in(up, UART_IER);
1397         serial_out(up, UART_IER, 0);
1398
1399         /*
1400          *      Now, do each character
1401          */
1402         for (i = 0; i < count; i++, s++) {
1403                 wait_for_xmitr(up);
1404
1405                 /*
1406                  *      Send the character out.
1407                  *      If a LF, also do CR...
1408                  */
1409                 serial_out(up, UART_TX, *s);
1410                 if (*s == 10) {
1411                         wait_for_xmitr(up);
1412                         serial_out(up, UART_TX, 13);
1413                 }
1414         }
1415
1416         /*
1417          *      Finally, wait for transmitter to become empty
1418          *      and restore the IER
1419          */
1420         wait_for_xmitr(up);
1421         serial_out(up, UART_IER, ier);
1422 }
1423
1424 /*
1425  *      Setup initial baud/bits/parity. We do two things here:
1426  *      - construct a cflag setting for the first su_open()
1427  *      - initialize the serial port
1428  *      Return non-zero if we didn't find a serial port.
1429  */
1430 static int sunsu_console_setup(struct console *co, char *options)
1431 {
1432         struct uart_port *port;
1433         int baud = 9600;
1434         int bits = 8;
1435         int parity = 'n';
1436         int flow = 'n';
1437
1438         printk("Console: ttyS%d (SU)\n",
1439                (sunsu_reg.minor - 64) + co->index);
1440
1441         /*
1442          * Check whether an invalid uart number has been specified, and
1443          * if so, search for the first available port that does have
1444          * console support.
1445          */
1446         if (co->index >= UART_NR)
1447                 co->index = 0;
1448         port = &sunsu_ports[co->index].port;
1449
1450         /*
1451          * Temporary fix.
1452          */
1453         spin_lock_init(&port->lock);
1454
1455         if (options)
1456                 uart_parse_options(options, &baud, &parity, &bits, &flow);
1457
1458         return uart_set_options(port, co, baud, parity, bits, flow);
1459 }
1460
1461 static struct console sunsu_cons = {
1462         .name   =       "ttyS",
1463         .write  =       sunsu_console_write,
1464         .device =       uart_console_device,
1465         .setup  =       sunsu_console_setup,
1466         .flags  =       CON_PRINTBUFFER,
1467         .index  =       -1,
1468         .data   =       &sunsu_reg,
1469 };
1470 #define SUNSU_CONSOLE   (&sunsu_cons)
1471
1472 /*
1473  *      Register console.
1474  */
1475
1476 static int __init sunsu_serial_console_init(void)
1477 {
1478         int i;
1479
1480         if (con_is_present())
1481                 return 0;
1482
1483         for (i = 0; i < UART_NR; i++) {
1484                 int this_minor = sunsu_reg.minor + i;
1485
1486                 if ((this_minor - 64) == (serial_console - 1))
1487                         break;
1488         }
1489         if (i == UART_NR)
1490                 return 0;
1491         if (sunsu_ports[i].port_node == 0)
1492                 return 0;
1493
1494         sunsu_cons.index = i;
1495         register_console(&sunsu_cons);
1496         return 0;
1497 }
1498 #else
1499 #define SUNSU_CONSOLE                   (NULL)
1500 #define sunsu_serial_console_init()     do { } while (0)
1501 #endif
1502
1503 static int __init sunsu_serial_init(void)
1504 {
1505         int instance, ret, i;
1506
1507         /* How many instances do we need?  */
1508         instance = 0;
1509         for (i = 0; i < UART_NR; i++) {
1510                 struct uart_sunsu_port *up = &sunsu_ports[i];
1511
1512                 if (up->su_type == SU_PORT_MS ||
1513                     up->su_type == SU_PORT_KBD)
1514                         continue;
1515
1516                 up->port.flags |= UPF_BOOT_AUTOCONF;
1517                 up->port.type = PORT_UNKNOWN;
1518                 up->port.uartclk = (SU_BASE_BAUD * 16);
1519
1520                 sunsu_autoconfig(up);
1521                 if (up->port.type == PORT_UNKNOWN)
1522                         continue;
1523
1524                 up->port.line = instance++;
1525                 up->port.ops = &sunsu_pops;
1526         }
1527
1528         sunsu_reg.minor = sunserial_current_minor;
1529         sunserial_current_minor += instance;
1530
1531         sunsu_reg.nr = instance;
1532         sunsu_reg.cons = SUNSU_CONSOLE;
1533
1534         ret = uart_register_driver(&sunsu_reg);
1535         if (ret < 0)
1536                 return ret;
1537
1538         sunsu_serial_console_init();
1539         for (i = 0; i < UART_NR; i++) {
1540                 struct uart_sunsu_port *up = &sunsu_ports[i];
1541
1542                 /* Do not register Keyboard/Mouse lines with UART
1543                  * layer.
1544                  */
1545                 if (up->su_type == SU_PORT_MS ||
1546                     up->su_type == SU_PORT_KBD)
1547                         continue;
1548
1549                 if (up->port.type == PORT_UNKNOWN)
1550                         continue;
1551
1552                 uart_add_one_port(&sunsu_reg, &up->port);
1553         }
1554
1555         return 0;
1556 }
1557
1558 static int su_node_ok(int node, char *name, int namelen)
1559 {
1560         if (strncmp(name, "su", namelen) == 0 ||
1561             strncmp(name, "su_pnp", namelen) == 0)
1562                 return 1;
1563
1564         if (strncmp(name, "serial", namelen) == 0) {
1565                 char compat[32];
1566                 int clen;
1567
1568                 /* Is it _really_ a 'su' device? */
1569                 clen = prom_getproperty(node, "compatible", compat, sizeof(compat));
1570                 if (clen > 0) {
1571                         if (strncmp(compat, "sab82532", 8) == 0) {
1572                                 /* Nope, Siemens serial, not for us. */
1573                                 return 0;
1574                         }
1575                 }
1576                 return 1;
1577         }
1578
1579         return 0;
1580 }
1581
1582 #define SU_PROPSIZE     128
1583
1584 /*
1585  * Scan status structure.
1586  * "prop" is a local variable but it eats stack to keep it in each
1587  * stack frame of a recursive procedure.
1588  */
1589 struct su_probe_scan {
1590         int msnode, kbnode;     /* PROM nodes for mouse and keyboard */
1591         int msx, kbx;           /* minors for mouse and keyboard */
1592         int devices;            /* scan index */
1593         char prop[SU_PROPSIZE];
1594 };
1595
1596 /*
1597  * We have several platforms which present 'su' in different parts
1598  * of the device tree. 'su' may be found under obio, ebus, isa and pci.
1599  * We walk over the tree and find them wherever PROM hides them.
1600  */
1601 static void __init su_probe_any(struct su_probe_scan *t, int sunode)
1602 {
1603         struct uart_sunsu_port *up;
1604         int len;
1605
1606         if (t->devices >= UART_NR)
1607                 return;
1608
1609         for (; sunode != 0; sunode = prom_getsibling(sunode)) {
1610                 len = prom_getproperty(sunode, "name", t->prop, SU_PROPSIZE);
1611                 if (len <= 1)
1612                         continue;               /* Broken PROM node */
1613
1614                 if (su_node_ok(sunode, t->prop, len)) {
1615                         up = &sunsu_ports[t->devices];
1616                         if (t->kbnode != 0 && sunode == t->kbnode) {
1617                                 t->kbx = t->devices;
1618                                 up->su_type = SU_PORT_KBD;
1619                         } else if (t->msnode != 0 && sunode == t->msnode) {
1620                                 t->msx = t->devices;
1621                                 up->su_type = SU_PORT_MS;
1622                         } else {
1623 #ifdef CONFIG_SPARC64
1624                                 /*
1625                                  * Do not attempt to use the truncated
1626                                  * keyboard/mouse ports as serial ports
1627                                  * on Ultras with PC keyboard attached.
1628                                  */
1629                                 if (prom_getbool(sunode, "mouse"))
1630                                         continue;
1631                                 if (prom_getbool(sunode, "keyboard"))
1632                                         continue;
1633 #endif
1634                                 up->su_type = SU_PORT_PORT;
1635                         }
1636                         up->port_node = sunode;
1637                         ++t->devices;
1638                 } else {
1639                         su_probe_any(t, prom_getchild(sunode));
1640                 }
1641         }
1642 }
1643
1644 static int __init sunsu_probe(void)
1645 {
1646         int node;
1647         int len;
1648         struct su_probe_scan scan;
1649
1650         /*
1651          * First, we scan the tree.
1652          */
1653         scan.devices = 0;
1654         scan.msx = -1;
1655         scan.kbx = -1;
1656         scan.kbnode = 0;
1657         scan.msnode = 0;
1658
1659         /*
1660          * Get the nodes for keyboard and mouse from 'aliases'...
1661          */
1662         node = prom_getchild(prom_root_node);
1663         node = prom_searchsiblings(node, "aliases");
1664         if (node != 0) {
1665                 len = prom_getproperty(node, "keyboard", scan.prop, SU_PROPSIZE);
1666                 if (len > 0) {
1667                         scan.prop[len] = 0;
1668                         scan.kbnode = prom_finddevice(scan.prop);
1669                 }
1670
1671                 len = prom_getproperty(node, "mouse", scan.prop, SU_PROPSIZE);
1672                 if (len > 0) {
1673                         scan.prop[len] = 0;
1674                         scan.msnode = prom_finddevice(scan.prop);
1675                 }
1676         }
1677
1678         su_probe_any(&scan, prom_getchild(prom_root_node));
1679
1680         /*
1681          * Second, we process the special case of keyboard and mouse.
1682          *
1683          * Currently if we got keyboard and mouse hooked to "su" ports
1684          * we do not use any possible remaining "su" as a serial port.
1685          * Thus, we ignore values of .msx and .kbx, then compact ports.
1686          */
1687         if (scan.msx != -1 && scan.kbx != -1) {
1688                 sunsu_ports[0].su_type = SU_PORT_MS;
1689                 sunsu_ports[0].port_node = scan.msnode;
1690                 sunsu_kbd_ms_init(&sunsu_ports[0], 0);
1691
1692                 sunsu_ports[1].su_type = SU_PORT_KBD;
1693                 sunsu_ports[1].port_node = scan.kbnode;
1694                 sunsu_kbd_ms_init(&sunsu_ports[1], 1);
1695
1696                 return 0;
1697         }
1698
1699         if (scan.msx != -1 || scan.kbx != -1) {
1700                 printk("sunsu_probe: cannot match keyboard and mouse, confused\n");
1701                 return -ENODEV;
1702         }
1703
1704         if (scan.devices == 0)
1705                 return -ENODEV;
1706
1707         /*
1708          * Console must be initiated after the generic initialization.
1709          */
1710         sunsu_serial_init();
1711
1712         return 0;
1713 }
1714
1715 static void __exit sunsu_exit(void)
1716 {
1717         int i, saw_uart;
1718
1719         saw_uart = 0;
1720         for (i = 0; i < UART_NR; i++) {
1721                 struct uart_sunsu_port *up = &sunsu_ports[i];
1722
1723                 if (up->su_type == SU_PORT_MS ||
1724                     up->su_type == SU_PORT_KBD) {
1725 #ifdef CONFIG_SERIO
1726                         if (up->serio) {
1727                                 serio_unregister_port(up->serio);
1728                                 up->serio = NULL;
1729                         }
1730 #endif
1731                 } else if (up->port.type != PORT_UNKNOWN) {
1732                         uart_remove_one_port(&sunsu_reg, &up->port);
1733                         saw_uart++;
1734                 }
1735         }
1736
1737         if (saw_uart)
1738                 uart_unregister_driver(&sunsu_reg);
1739 }
1740
1741 module_init(sunsu_probe);
1742 module_exit(sunsu_exit);