/home/lenb/linux-2.6 branch 'acpi-2.6.12'
[linux-2.6] / 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 SERIAL_IO_HUB6:
113                 outb(up->port.hub6 - 1 + offset, up->port.iobase);
114                 return inb(up->port.iobase + 1);
115
116         case SERIAL_IO_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 SERIAL_IO_HUB6:
143                 outb(up->port.hub6 - 1 + offset, up->port.iobase);
144                 outb(value, up->port.iobase + 1);
145                 break;
146
147         case SERIAL_IO_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 void sunsu_stop_tx(struct uart_port *port, unsigned int tty_stop)
259 {
260         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
261
262         if (up->ier & UART_IER_THRI) {
263                 up->ier &= ~UART_IER_THRI;
264                 serial_out(up, UART_IER, up->ier);
265         }
266         if (up->port.type == PORT_16C950 && tty_stop) {
267                 up->acr |= UART_ACR_TXDIS;
268                 serial_icr_write(up, UART_ACR, up->acr);
269         }
270 }
271
272 static void sunsu_start_tx(struct uart_port *port, unsigned int tty_start)
273 {
274         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
275
276         if (!(up->ier & UART_IER_THRI)) {
277                 up->ier |= UART_IER_THRI;
278                 serial_out(up, UART_IER, up->ier);
279         }
280         /*
281          * We only do this from uart_start
282          */
283         if (tty_start && up->port.type == PORT_16C950) {
284                 up->acr &= ~UART_ACR_TXDIS;
285                 serial_icr_write(up, UART_ACR, up->acr);
286         }
287 }
288
289 static void sunsu_stop_rx(struct uart_port *port)
290 {
291         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
292         unsigned long flags;
293
294         spin_lock_irqsave(&up->port.lock, flags);
295         up->ier &= ~UART_IER_RLSI;
296         up->port.read_status_mask &= ~UART_LSR_DR;
297         serial_out(up, UART_IER, up->ier);
298         spin_unlock_irqrestore(&up->port.lock, flags);
299 }
300
301 static void sunsu_enable_ms(struct uart_port *port)
302 {
303         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
304         unsigned long flags;
305
306         spin_lock_irqsave(&up->port.lock, flags);
307         up->ier |= UART_IER_MSI;
308         serial_out(up, UART_IER, up->ier);
309         spin_unlock_irqrestore(&up->port.lock, flags);
310 }
311
312 static _INLINE_ struct tty_struct *
313 receive_chars(struct uart_sunsu_port *up, unsigned char *status, struct pt_regs *regs)
314 {
315         struct tty_struct *tty = up->port.info->tty;
316         unsigned char ch;
317         int max_count = 256;
318         int saw_console_brk = 0;
319
320         do {
321                 if (unlikely(tty->flip.count >= TTY_FLIPBUF_SIZE)) {
322                         tty->flip.work.func((void *)tty);
323                         if (tty->flip.count >= TTY_FLIPBUF_SIZE)
324                                 return tty; // if TTY_DONT_FLIP is set
325                 }
326                 ch = serial_inp(up, UART_RX);
327                 *tty->flip.char_buf_ptr = ch;
328                 *tty->flip.flag_buf_ptr = TTY_NORMAL;
329                 up->port.icount.rx++;
330
331                 if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE |
332                                        UART_LSR_FE | UART_LSR_OE))) {
333                         /*
334                          * For statistics only
335                          */
336                         if (*status & UART_LSR_BI) {
337                                 *status &= ~(UART_LSR_FE | UART_LSR_PE);
338                                 up->port.icount.brk++;
339                                 if (up->port.cons != NULL &&
340                                     up->port.line == up->port.cons->index)
341                                         saw_console_brk = 1;
342                                 /*
343                                  * We do the SysRQ and SAK checking
344                                  * here because otherwise the break
345                                  * may get masked by ignore_status_mask
346                                  * or read_status_mask.
347                                  */
348                                 if (uart_handle_break(&up->port))
349                                         goto ignore_char;
350                         } else if (*status & UART_LSR_PE)
351                                 up->port.icount.parity++;
352                         else if (*status & UART_LSR_FE)
353                                 up->port.icount.frame++;
354                         if (*status & UART_LSR_OE)
355                                 up->port.icount.overrun++;
356
357                         /*
358                          * Mask off conditions which should be ingored.
359                          */
360                         *status &= up->port.read_status_mask;
361
362                         if (up->port.cons != NULL &&
363                             up->port.line == up->port.cons->index) {
364                                 /* Recover the break flag from console xmit */
365                                 *status |= up->lsr_break_flag;
366                                 up->lsr_break_flag = 0;
367                         }
368
369                         if (*status & UART_LSR_BI) {
370                                 *tty->flip.flag_buf_ptr = TTY_BREAK;
371                         } else if (*status & UART_LSR_PE)
372                                 *tty->flip.flag_buf_ptr = TTY_PARITY;
373                         else if (*status & UART_LSR_FE)
374                                 *tty->flip.flag_buf_ptr = TTY_FRAME;
375                 }
376                 if (uart_handle_sysrq_char(&up->port, ch, regs))
377                         goto ignore_char;
378                 if ((*status & up->port.ignore_status_mask) == 0) {
379                         tty->flip.flag_buf_ptr++;
380                         tty->flip.char_buf_ptr++;
381                         tty->flip.count++;
382                 }
383                 if ((*status & UART_LSR_OE) &&
384                     tty->flip.count < TTY_FLIPBUF_SIZE) {
385                         /*
386                          * Overrun is special, since it's reported
387                          * immediately, and doesn't affect the current
388                          * character.
389                          */
390                         *tty->flip.flag_buf_ptr = TTY_OVERRUN;
391                         tty->flip.flag_buf_ptr++;
392                         tty->flip.char_buf_ptr++;
393                         tty->flip.count++;
394                 }
395         ignore_char:
396                 *status = serial_inp(up, UART_LSR);
397         } while ((*status & UART_LSR_DR) && (max_count-- > 0));
398
399         if (saw_console_brk)
400                 sun_do_break();
401
402         return tty;
403 }
404
405 static _INLINE_ void transmit_chars(struct uart_sunsu_port *up)
406 {
407         struct circ_buf *xmit = &up->port.info->xmit;
408         int count;
409
410         if (up->port.x_char) {
411                 serial_outp(up, UART_TX, up->port.x_char);
412                 up->port.icount.tx++;
413                 up->port.x_char = 0;
414                 return;
415         }
416         if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
417                 sunsu_stop_tx(&up->port, 0);
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                 sunsu_stop_tx(&up->port, 0);
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         spin_unlock(&up->port.lock);
508
509         sunsu_change_speed(&up->port, up->cflag, 0, quot);
510
511         spin_lock(&up->port.lock);
512 }
513
514 static void receive_kbd_ms_chars(struct uart_sunsu_port *up, struct pt_regs *regs, int is_break)
515 {
516         do {
517                 unsigned char ch = serial_inp(up, UART_RX);
518
519                 /* Stop-A is handled by drivers/char/keyboard.c now. */
520                 if (up->su_type == SU_PORT_KBD) {
521 #ifdef CONFIG_SERIO
522                         serio_interrupt(up->serio, ch, 0, regs);
523 #endif
524                 } else if (up->su_type == SU_PORT_MS) {
525                         int ret = suncore_mouse_baud_detection(ch, is_break);
526
527                         switch (ret) {
528                         case 2:
529                                 sunsu_change_mouse_baud(up);
530                                 /* fallthru */
531                         case 1:
532                                 break;
533
534                         case 0:
535 #ifdef CONFIG_SERIO
536                                 serio_interrupt(up->serio, ch, 0, regs);
537 #endif
538                                 break;
539                         };
540                 }
541         } while (serial_in(up, UART_LSR) & UART_LSR_DR);
542 }
543
544 static irqreturn_t sunsu_kbd_ms_interrupt(int irq, void *dev_id, struct pt_regs *regs)
545 {
546         struct uart_sunsu_port *up = dev_id;
547
548         if (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT)) {
549                 unsigned char status = serial_inp(up, UART_LSR);
550
551                 if ((status & UART_LSR_DR) || (status & UART_LSR_BI))
552                         receive_kbd_ms_chars(up, regs,
553                                              (status & UART_LSR_BI) != 0);
554         }
555
556         return IRQ_HANDLED;
557 }
558
559 static unsigned int sunsu_tx_empty(struct uart_port *port)
560 {
561         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
562         unsigned long flags;
563         unsigned int ret;
564
565         spin_lock_irqsave(&up->port.lock, flags);
566         ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
567         spin_unlock_irqrestore(&up->port.lock, flags);
568
569         return ret;
570 }
571
572 static unsigned int sunsu_get_mctrl(struct uart_port *port)
573 {
574         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
575         unsigned char status;
576         unsigned int ret;
577
578         status = serial_in(up, UART_MSR);
579
580         ret = 0;
581         if (status & UART_MSR_DCD)
582                 ret |= TIOCM_CAR;
583         if (status & UART_MSR_RI)
584                 ret |= TIOCM_RNG;
585         if (status & UART_MSR_DSR)
586                 ret |= TIOCM_DSR;
587         if (status & UART_MSR_CTS)
588                 ret |= TIOCM_CTS;
589         return ret;
590 }
591
592 static void sunsu_set_mctrl(struct uart_port *port, unsigned int mctrl)
593 {
594         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
595         unsigned char mcr = 0;
596
597         if (mctrl & TIOCM_RTS)
598                 mcr |= UART_MCR_RTS;
599         if (mctrl & TIOCM_DTR)
600                 mcr |= UART_MCR_DTR;
601         if (mctrl & TIOCM_OUT1)
602                 mcr |= UART_MCR_OUT1;
603         if (mctrl & TIOCM_OUT2)
604                 mcr |= UART_MCR_OUT2;
605         if (mctrl & TIOCM_LOOP)
606                 mcr |= UART_MCR_LOOP;
607
608         serial_out(up, UART_MCR, mcr);
609 }
610
611 static void sunsu_break_ctl(struct uart_port *port, int break_state)
612 {
613         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
614         unsigned long flags;
615
616         spin_lock_irqsave(&up->port.lock, flags);
617         if (break_state == -1)
618                 up->lcr |= UART_LCR_SBC;
619         else
620                 up->lcr &= ~UART_LCR_SBC;
621         serial_out(up, UART_LCR, up->lcr);
622         spin_unlock_irqrestore(&up->port.lock, flags);
623 }
624
625 static int sunsu_startup(struct uart_port *port)
626 {
627         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
628         unsigned long flags;
629         int retval;
630
631         if (up->port.type == PORT_16C950) {
632                 /* Wake up and initialize UART */
633                 up->acr = 0;
634                 serial_outp(up, UART_LCR, 0xBF);
635                 serial_outp(up, UART_EFR, UART_EFR_ECB);
636                 serial_outp(up, UART_IER, 0);
637                 serial_outp(up, UART_LCR, 0);
638                 serial_icr_write(up, UART_CSR, 0); /* Reset the UART */
639                 serial_outp(up, UART_LCR, 0xBF);
640                 serial_outp(up, UART_EFR, UART_EFR_ECB);
641                 serial_outp(up, UART_LCR, 0);
642         }
643
644 #ifdef CONFIG_SERIAL_8250_RSA
645         /*
646          * If this is an RSA port, see if we can kick it up to the
647          * higher speed clock.
648          */
649         enable_rsa(up);
650 #endif
651
652         /*
653          * Clear the FIFO buffers and disable them.
654          * (they will be reeanbled in set_termios())
655          */
656         if (uart_config[up->port.type].flags & UART_CLEAR_FIFO) {
657                 serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
658                 serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO |
659                                 UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
660                 serial_outp(up, UART_FCR, 0);
661         }
662
663         /*
664          * Clear the interrupt registers.
665          */
666         (void) serial_inp(up, UART_LSR);
667         (void) serial_inp(up, UART_RX);
668         (void) serial_inp(up, UART_IIR);
669         (void) serial_inp(up, UART_MSR);
670
671         /*
672          * At this point, there's no way the LSR could still be 0xff;
673          * if it is, then bail out, because there's likely no UART
674          * here.
675          */
676         if (!(up->port.flags & ASYNC_BUGGY_UART) &&
677             (serial_inp(up, UART_LSR) == 0xff)) {
678                 printk("ttyS%d: LSR safety check engaged!\n", up->port.line);
679                 return -ENODEV;
680         }
681
682         if (up->su_type != SU_PORT_PORT) {
683                 retval = request_irq(up->port.irq, sunsu_kbd_ms_interrupt,
684                                      SA_SHIRQ, su_typev[up->su_type], up);
685         } else {
686                 retval = request_irq(up->port.irq, sunsu_serial_interrupt,
687                                      SA_SHIRQ, su_typev[up->su_type], up);
688         }
689         if (retval) {
690                 printk("su: Cannot register IRQ %d\n", up->port.irq);
691                 return retval;
692         }
693
694         /*
695          * Now, initialize the UART
696          */
697         serial_outp(up, UART_LCR, UART_LCR_WLEN8);
698
699         spin_lock_irqsave(&up->port.lock, flags);
700
701         up->port.mctrl |= TIOCM_OUT2;
702
703         sunsu_set_mctrl(&up->port, up->port.mctrl);
704         spin_unlock_irqrestore(&up->port.lock, flags);
705
706         /*
707          * Finally, enable interrupts.  Note: Modem status interrupts
708          * are set via set_termios(), which will be occurring imminently
709          * anyway, so we don't enable them here.
710          */
711         up->ier = UART_IER_RLSI | UART_IER_RDI;
712         serial_outp(up, UART_IER, up->ier);
713
714         if (up->port.flags & ASYNC_FOURPORT) {
715                 unsigned int icp;
716                 /*
717                  * Enable interrupts on the AST Fourport board
718                  */
719                 icp = (up->port.iobase & 0xfe0) | 0x01f;
720                 outb_p(0x80, icp);
721                 (void) inb_p(icp);
722         }
723
724         /*
725          * And clear the interrupt registers again for luck.
726          */
727         (void) serial_inp(up, UART_LSR);
728         (void) serial_inp(up, UART_RX);
729         (void) serial_inp(up, UART_IIR);
730         (void) serial_inp(up, UART_MSR);
731
732         return 0;
733 }
734
735 static void sunsu_shutdown(struct uart_port *port)
736 {
737         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
738         unsigned long flags;
739
740         /*
741          * Disable interrupts from this port
742          */
743         up->ier = 0;
744         serial_outp(up, UART_IER, 0);
745
746         spin_lock_irqsave(&up->port.lock, flags);
747         if (up->port.flags & ASYNC_FOURPORT) {
748                 /* reset interrupts on the AST Fourport board */
749                 inb((up->port.iobase & 0xfe0) | 0x1f);
750                 up->port.mctrl |= TIOCM_OUT1;
751         } else
752                 up->port.mctrl &= ~TIOCM_OUT2;
753
754         sunsu_set_mctrl(&up->port, up->port.mctrl);
755         spin_unlock_irqrestore(&up->port.lock, flags);
756
757         /*
758          * Disable break condition and FIFOs
759          */
760         serial_out(up, UART_LCR, serial_inp(up, UART_LCR) & ~UART_LCR_SBC);
761         serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO |
762                                   UART_FCR_CLEAR_RCVR |
763                                   UART_FCR_CLEAR_XMIT);
764         serial_outp(up, UART_FCR, 0);
765
766 #ifdef CONFIG_SERIAL_8250_RSA
767         /*
768          * Reset the RSA board back to 115kbps compat mode.
769          */
770         disable_rsa(up);
771 #endif
772
773         /*
774          * Read data port to reset things.
775          */
776         (void) serial_in(up, UART_RX);
777
778         free_irq(up->port.irq, up);
779 }
780
781 static void
782 sunsu_change_speed(struct uart_port *port, unsigned int cflag,
783                    unsigned int iflag, unsigned int quot)
784 {
785         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
786         unsigned char cval, fcr = 0;
787         unsigned long flags;
788
789         switch (cflag & CSIZE) {
790         case CS5:
791                 cval = 0x00;
792                 break;
793         case CS6:
794                 cval = 0x01;
795                 break;
796         case CS7:
797                 cval = 0x02;
798                 break;
799         default:
800         case CS8:
801                 cval = 0x03;
802                 break;
803         }
804
805         if (cflag & CSTOPB)
806                 cval |= 0x04;
807         if (cflag & PARENB)
808                 cval |= UART_LCR_PARITY;
809         if (!(cflag & PARODD))
810                 cval |= UART_LCR_EPAR;
811 #ifdef CMSPAR
812         if (cflag & CMSPAR)
813                 cval |= UART_LCR_SPAR;
814 #endif
815
816         /*
817          * Work around a bug in the Oxford Semiconductor 952 rev B
818          * chip which causes it to seriously miscalculate baud rates
819          * when DLL is 0.
820          */
821         if ((quot & 0xff) == 0 && up->port.type == PORT_16C950 &&
822             up->rev == 0x5201)
823                 quot ++;
824
825         if (uart_config[up->port.type].flags & UART_USE_FIFO) {
826                 if ((up->port.uartclk / quot) < (2400 * 16))
827                         fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
828 #ifdef CONFIG_SERIAL_8250_RSA
829                 else if (up->port.type == PORT_RSA)
830                         fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_14;
831 #endif
832                 else
833                         fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8;
834         }
835         if (up->port.type == PORT_16750)
836                 fcr |= UART_FCR7_64BYTE;
837
838         /*
839          * Ok, we're now changing the port state.  Do it with
840          * interrupts disabled.
841          */
842         spin_lock_irqsave(&up->port.lock, flags);
843
844         /*
845          * Update the per-port timeout.
846          */
847         uart_update_timeout(port, cflag, (port->uartclk / (16 * quot)));
848
849         up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
850         if (iflag & INPCK)
851                 up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
852         if (iflag & (BRKINT | PARMRK))
853                 up->port.read_status_mask |= UART_LSR_BI;
854
855         /*
856          * Characteres to ignore
857          */
858         up->port.ignore_status_mask = 0;
859         if (iflag & IGNPAR)
860                 up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
861         if (iflag & IGNBRK) {
862                 up->port.ignore_status_mask |= UART_LSR_BI;
863                 /*
864                  * If we're ignoring parity and break indicators,
865                  * ignore overruns too (for real raw support).
866                  */
867                 if (iflag & IGNPAR)
868                         up->port.ignore_status_mask |= UART_LSR_OE;
869         }
870
871         /*
872          * ignore all characters if CREAD is not set
873          */
874         if ((cflag & CREAD) == 0)
875                 up->port.ignore_status_mask |= UART_LSR_DR;
876
877         /*
878          * CTS flow control flag and modem status interrupts
879          */
880         up->ier &= ~UART_IER_MSI;
881         if (UART_ENABLE_MS(&up->port, cflag))
882                 up->ier |= UART_IER_MSI;
883
884         serial_out(up, UART_IER, up->ier);
885
886         if (uart_config[up->port.type].flags & UART_STARTECH) {
887                 serial_outp(up, UART_LCR, 0xBF);
888                 serial_outp(up, UART_EFR, cflag & CRTSCTS ? UART_EFR_CTS :0);
889         }
890         serial_outp(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
891         serial_outp(up, UART_DLL, quot & 0xff);         /* LS of divisor */
892         serial_outp(up, UART_DLM, quot >> 8);           /* MS of divisor */
893         if (up->port.type == PORT_16750)
894                 serial_outp(up, UART_FCR, fcr);         /* set fcr */
895         serial_outp(up, UART_LCR, cval);                /* reset DLAB */
896         up->lcr = cval;                                 /* Save LCR */
897         if (up->port.type != PORT_16750) {
898                 if (fcr & UART_FCR_ENABLE_FIFO) {
899                         /* emulated UARTs (Lucent Venus 167x) need two steps */
900                         serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
901                 }
902                 serial_outp(up, UART_FCR, fcr);         /* set fcr */
903         }
904
905         up->cflag = cflag;
906
907         spin_unlock_irqrestore(&up->port.lock, flags);
908 }
909
910 static void
911 sunsu_set_termios(struct uart_port *port, struct termios *termios,
912                   struct termios *old)
913 {
914         unsigned int baud, quot;
915
916         /*
917          * Ask the core to calculate the divisor for us.
918          */
919         baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); 
920         quot = uart_get_divisor(port, baud);
921
922         sunsu_change_speed(port, termios->c_cflag, termios->c_iflag, quot);
923 }
924
925 static void sunsu_release_port(struct uart_port *port)
926 {
927 }
928
929 static int sunsu_request_port(struct uart_port *port)
930 {
931         return 0;
932 }
933
934 static void sunsu_config_port(struct uart_port *port, int flags)
935 {
936         struct uart_sunsu_port *up = (struct uart_sunsu_port *) port;
937
938         if (flags & UART_CONFIG_TYPE) {
939                 /*
940                  * We are supposed to call autoconfig here, but this requires
941                  * splitting all the OBP probing crap from the UART probing.
942                  * We'll do it when we kill sunsu.c altogether.
943                  */
944                 port->type = up->type_probed;   /* XXX */
945         }
946 }
947
948 static int
949 sunsu_verify_port(struct uart_port *port, struct serial_struct *ser)
950 {
951         return -EINVAL;
952 }
953
954 static const char *
955 sunsu_type(struct uart_port *port)
956 {
957         int type = port->type;
958
959         if (type >= ARRAY_SIZE(uart_config))
960                 type = 0;
961         return uart_config[type].name;
962 }
963
964 static struct uart_ops sunsu_pops = {
965         .tx_empty       = sunsu_tx_empty,
966         .set_mctrl      = sunsu_set_mctrl,
967         .get_mctrl      = sunsu_get_mctrl,
968         .stop_tx        = sunsu_stop_tx,
969         .start_tx       = sunsu_start_tx,
970         .stop_rx        = sunsu_stop_rx,
971         .enable_ms      = sunsu_enable_ms,
972         .break_ctl      = sunsu_break_ctl,
973         .startup        = sunsu_startup,
974         .shutdown       = sunsu_shutdown,
975         .set_termios    = sunsu_set_termios,
976         .type           = sunsu_type,
977         .release_port   = sunsu_release_port,
978         .request_port   = sunsu_request_port,
979         .config_port    = sunsu_config_port,
980         .verify_port    = sunsu_verify_port,
981 };
982
983 #define UART_NR 4
984
985 static struct uart_sunsu_port sunsu_ports[UART_NR];
986
987 #ifdef CONFIG_SERIO
988
989 static DEFINE_SPINLOCK(sunsu_serio_lock);
990
991 static int sunsu_serio_write(struct serio *serio, unsigned char ch)
992 {
993         struct uart_sunsu_port *up = serio->port_data;
994         unsigned long flags;
995         int lsr;
996
997         spin_lock_irqsave(&sunsu_serio_lock, flags);
998
999         do {
1000                 lsr = serial_in(up, UART_LSR);
1001         } while (!(lsr & UART_LSR_THRE));
1002
1003         /* Send the character out. */
1004         serial_out(up, UART_TX, ch);
1005
1006         spin_unlock_irqrestore(&sunsu_serio_lock, flags);
1007
1008         return 0;
1009 }
1010
1011 static int sunsu_serio_open(struct serio *serio)
1012 {
1013         struct uart_sunsu_port *up = serio->port_data;
1014         unsigned long flags;
1015         int ret;
1016
1017         spin_lock_irqsave(&sunsu_serio_lock, flags);
1018         if (!up->serio_open) {
1019                 up->serio_open = 1;
1020                 ret = 0;
1021         } else
1022                 ret = -EBUSY;
1023         spin_unlock_irqrestore(&sunsu_serio_lock, flags);
1024
1025         return ret;
1026 }
1027
1028 static void sunsu_serio_close(struct serio *serio)
1029 {
1030         struct uart_sunsu_port *up = serio->port_data;
1031         unsigned long flags;
1032
1033         spin_lock_irqsave(&sunsu_serio_lock, flags);
1034         up->serio_open = 0;
1035         spin_unlock_irqrestore(&sunsu_serio_lock, flags);
1036 }
1037
1038 #endif /* CONFIG_SERIO */
1039
1040 static void sunsu_autoconfig(struct uart_sunsu_port *up)
1041 {
1042         unsigned char status1, status2, scratch, scratch2, scratch3;
1043         unsigned char save_lcr, save_mcr;
1044         struct linux_ebus_device *dev = NULL;
1045         struct linux_ebus *ebus;
1046 #ifdef CONFIG_SPARC64
1047         struct sparc_isa_bridge *isa_br;
1048         struct sparc_isa_device *isa_dev;
1049 #endif
1050 #ifndef CONFIG_SPARC64
1051         struct linux_prom_registers reg0;
1052 #endif
1053         unsigned long flags;
1054
1055         if (!up->port_node || !up->su_type)
1056                 return;
1057
1058         up->type_probed = PORT_UNKNOWN;
1059         up->port.iotype = SERIAL_IO_MEM;
1060
1061         /*
1062          * First we look for Ebus-bases su's
1063          */
1064         for_each_ebus(ebus) {
1065                 for_each_ebusdev(dev, ebus) {
1066                         if (dev->prom_node == up->port_node) {
1067                                 /*
1068                                  * The EBus is broken on sparc; it delivers
1069                                  * virtual addresses in resources. Oh well...
1070                                  * This is correct on sparc64, though.
1071                                  */
1072                                 up->port.membase = (char *) dev->resource[0].start;
1073                                 /*
1074                                  * This is correct on both architectures.
1075                                  */
1076                                 up->port.mapbase = dev->resource[0].start;
1077                                 up->port.irq = dev->irqs[0];
1078                                 goto ebus_done;
1079                         }
1080                 }
1081         }
1082
1083 #ifdef CONFIG_SPARC64
1084         for_each_isa(isa_br) {
1085                 for_each_isadev(isa_dev, isa_br) {
1086                         if (isa_dev->prom_node == up->port_node) {
1087                                 /* Same on sparc64. Cool architecure... */
1088                                 up->port.membase = (char *) isa_dev->resource.start;
1089                                 up->port.mapbase = isa_dev->resource.start;
1090                                 up->port.irq = isa_dev->irq;
1091                                 goto ebus_done;
1092                         }
1093                 }
1094         }
1095 #endif
1096
1097 #ifdef CONFIG_SPARC64
1098         /*
1099          * Not on Ebus, bailing.
1100          */
1101         return;
1102 #else
1103         /*
1104          * Not on Ebus, must be OBIO.
1105          */
1106         if (prom_getproperty(up->port_node, "reg",
1107                              (char *)&reg0, sizeof(reg0)) == -1) {
1108                 prom_printf("sunsu: no \"reg\" property\n");
1109                 return;
1110         }
1111         prom_apply_obio_ranges(&reg0, 1);
1112         if (reg0.which_io != 0) {       /* Just in case... */
1113                 prom_printf("sunsu: bus number nonzero: 0x%x:%x\n",
1114                     reg0.which_io, reg0.phys_addr);
1115                 return;
1116         }
1117         up->port.mapbase = reg0.phys_addr;
1118         if ((up->port.membase = ioremap(reg0.phys_addr, reg0.reg_size)) == 0) {
1119                 prom_printf("sunsu: Cannot map registers.\n");
1120                 return;
1121         }
1122
1123         /*
1124          * 0x20 is sun4m thing, Dave Redman heritage.
1125          * See arch/sparc/kernel/irq.c.
1126          */
1127 #define IRQ_4M(n)       ((n)|0x20)
1128
1129         /*
1130          * There is no intr property on MrCoffee, so hardwire it.
1131          */
1132         up->port.irq = IRQ_4M(13);
1133 #endif
1134
1135 ebus_done:
1136
1137         spin_lock_irqsave(&up->port.lock, flags);
1138
1139         if (!(up->port.flags & ASYNC_BUGGY_UART)) {
1140                 /*
1141                  * Do a simple existence test first; if we fail this, there's
1142                  * no point trying anything else.
1143                  *
1144                  * 0x80 is used as a nonsense port to prevent against false
1145                  * positives due to ISA bus float.  The assumption is that
1146                  * 0x80 is a non-existent port; which should be safe since
1147                  * include/asm/io.h also makes this assumption.
1148                  */
1149                 scratch = serial_inp(up, UART_IER);
1150                 serial_outp(up, UART_IER, 0);
1151 #ifdef __i386__
1152                 outb(0xff, 0x080);
1153 #endif
1154                 scratch2 = serial_inp(up, UART_IER);
1155                 serial_outp(up, UART_IER, 0x0f);
1156 #ifdef __i386__
1157                 outb(0, 0x080);
1158 #endif
1159                 scratch3 = serial_inp(up, UART_IER);
1160                 serial_outp(up, UART_IER, scratch);
1161                 if (scratch2 != 0 || scratch3 != 0x0F)
1162                         goto out;       /* We failed; there's nothing here */
1163         }
1164
1165         save_mcr = serial_in(up, UART_MCR);
1166         save_lcr = serial_in(up, UART_LCR);
1167
1168         /* 
1169          * Check to see if a UART is really there.  Certain broken
1170          * internal modems based on the Rockwell chipset fail this
1171          * test, because they apparently don't implement the loopback
1172          * test mode.  So this test is skipped on the COM 1 through
1173          * COM 4 ports.  This *should* be safe, since no board
1174          * manufacturer would be stupid enough to design a board
1175          * that conflicts with COM 1-4 --- we hope!
1176          */
1177         if (!(up->port.flags & ASYNC_SKIP_TEST)) {
1178                 serial_outp(up, UART_MCR, UART_MCR_LOOP | 0x0A);
1179                 status1 = serial_inp(up, UART_MSR) & 0xF0;
1180                 serial_outp(up, UART_MCR, save_mcr);
1181                 if (status1 != 0x90)
1182                         goto out;       /* We failed loopback test */
1183         }
1184         serial_outp(up, UART_LCR, 0xBF);        /* set up for StarTech test */
1185         serial_outp(up, UART_EFR, 0);           /* EFR is the same as FCR */
1186         serial_outp(up, UART_LCR, 0);
1187         serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
1188         scratch = serial_in(up, UART_IIR) >> 6;
1189         switch (scratch) {
1190                 case 0:
1191                         up->port.type = PORT_16450;
1192                         break;
1193                 case 1:
1194                         up->port.type = PORT_UNKNOWN;
1195                         break;
1196                 case 2:
1197                         up->port.type = PORT_16550;
1198                         break;
1199                 case 3:
1200                         up->port.type = PORT_16550A;
1201                         break;
1202         }
1203         if (up->port.type == PORT_16550A) {
1204                 /* Check for Startech UART's */
1205                 serial_outp(up, UART_LCR, UART_LCR_DLAB);
1206                 if (serial_in(up, UART_EFR) == 0) {
1207                         up->port.type = PORT_16650;
1208                 } else {
1209                         serial_outp(up, UART_LCR, 0xBF);
1210                         if (serial_in(up, UART_EFR) == 0)
1211                                 up->port.type = PORT_16650V2;
1212                 }
1213         }
1214         if (up->port.type == PORT_16550A) {
1215                 /* Check for TI 16750 */
1216                 serial_outp(up, UART_LCR, save_lcr | UART_LCR_DLAB);
1217                 serial_outp(up, UART_FCR,
1218                             UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE);
1219                 scratch = serial_in(up, UART_IIR) >> 5;
1220                 if (scratch == 7) {
1221                         /*
1222                          * If this is a 16750, and not a cheap UART
1223                          * clone, then it should only go into 64 byte
1224                          * mode if the UART_FCR7_64BYTE bit was set
1225                          * while UART_LCR_DLAB was latched.
1226                          */
1227                         serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
1228                         serial_outp(up, UART_LCR, 0);
1229                         serial_outp(up, UART_FCR,
1230                                     UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE);
1231                         scratch = serial_in(up, UART_IIR) >> 5;
1232                         if (scratch == 6)
1233                                 up->port.type = PORT_16750;
1234                 }
1235                 serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO);
1236         }
1237         serial_outp(up, UART_LCR, save_lcr);
1238         if (up->port.type == PORT_16450) {
1239                 scratch = serial_in(up, UART_SCR);
1240                 serial_outp(up, UART_SCR, 0xa5);
1241                 status1 = serial_in(up, UART_SCR);
1242                 serial_outp(up, UART_SCR, 0x5a);
1243                 status2 = serial_in(up, UART_SCR);
1244                 serial_outp(up, UART_SCR, scratch);
1245
1246                 if ((status1 != 0xa5) || (status2 != 0x5a))
1247                         up->port.type = PORT_8250;
1248         }
1249
1250         up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size;
1251
1252         if (up->port.type == PORT_UNKNOWN)
1253                 goto out;
1254         up->type_probed = up->port.type;        /* XXX */
1255
1256         /*
1257          * Reset the UART.
1258          */
1259 #ifdef CONFIG_SERIAL_8250_RSA
1260         if (up->port.type == PORT_RSA)
1261                 serial_outp(up, UART_RSA_FRR, 0);
1262 #endif
1263         serial_outp(up, UART_MCR, save_mcr);
1264         serial_outp(up, UART_FCR, (UART_FCR_ENABLE_FIFO |
1265                                      UART_FCR_CLEAR_RCVR |
1266                                      UART_FCR_CLEAR_XMIT));
1267         serial_outp(up, UART_FCR, 0);
1268         (void)serial_in(up, UART_RX);
1269         serial_outp(up, UART_IER, 0);
1270
1271 out:
1272         spin_unlock_irqrestore(&up->port.lock, flags);
1273 }
1274
1275 static struct uart_driver sunsu_reg = {
1276         .owner                  = THIS_MODULE,
1277         .driver_name            = "serial",
1278         .devfs_name             = "tts/",
1279         .dev_name               = "ttyS",
1280         .major                  = TTY_MAJOR,
1281 };
1282
1283 static int __init sunsu_kbd_ms_init(struct uart_sunsu_port *up, int channel)
1284 {
1285         int quot, baud;
1286 #ifdef CONFIG_SERIO
1287         struct serio *serio;
1288 #endif
1289
1290         up->port.line = channel;
1291         up->port.type = PORT_UNKNOWN;
1292         up->port.uartclk = (SU_BASE_BAUD * 16);
1293
1294         if (up->su_type == SU_PORT_KBD) {
1295                 up->cflag = B1200 | CS8 | CLOCAL | CREAD;
1296                 baud = 1200;
1297         } else {
1298                 up->cflag = B4800 | CS8 | CLOCAL | CREAD;
1299                 baud = 4800;
1300         }
1301         quot = up->port.uartclk / (16 * baud);
1302
1303         sunsu_autoconfig(up);
1304         if (up->port.type == PORT_UNKNOWN)
1305                 return -1;
1306
1307         printk(KERN_INFO "su%d at 0x%p (irq = %s) is a %s\n",
1308                channel,
1309                up->port.membase, __irq_itoa(up->port.irq),
1310                sunsu_type(&up->port));
1311
1312 #ifdef CONFIG_SERIO
1313         up->serio = serio = kmalloc(sizeof(struct serio), GFP_KERNEL);
1314         if (serio) {
1315                 memset(serio, 0, sizeof(*serio));
1316
1317                 serio->port_data = up;
1318
1319                 serio->id.type = SERIO_RS232;
1320                 if (up->su_type == SU_PORT_KBD) {
1321                         serio->id.proto = SERIO_SUNKBD;
1322                         strlcpy(serio->name, "sukbd", sizeof(serio->name));
1323                 } else {
1324                         serio->id.proto = SERIO_SUN;
1325                         serio->id.extra = 1;
1326                         strlcpy(serio->name, "sums", sizeof(serio->name));
1327                 }
1328                 strlcpy(serio->phys, (channel == 0 ? "su/serio0" : "su/serio1"),
1329                         sizeof(serio->phys));
1330
1331                 serio->write = sunsu_serio_write;
1332                 serio->open = sunsu_serio_open;
1333                 serio->close = sunsu_serio_close;
1334
1335                 serio_register_port(serio);
1336         } else {
1337                 printk(KERN_WARNING "su%d: not enough memory for serio port\n",
1338                         channel);
1339         }
1340 #endif
1341
1342         sunsu_change_speed(&up->port, up->cflag, 0, quot);
1343
1344         sunsu_startup(&up->port);
1345         return 0;
1346 }
1347
1348 /*
1349  * ------------------------------------------------------------
1350  * Serial console driver
1351  * ------------------------------------------------------------
1352  */
1353
1354 #ifdef CONFIG_SERIAL_SUNSU_CONSOLE
1355
1356 #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
1357
1358 /*
1359  *      Wait for transmitter & holding register to empty
1360  */
1361 static __inline__ void wait_for_xmitr(struct uart_sunsu_port *up)
1362 {
1363         unsigned int status, tmout = 10000;
1364
1365         /* Wait up to 10ms for the character(s) to be sent. */
1366         do {
1367                 status = serial_in(up, UART_LSR);
1368
1369                 if (status & UART_LSR_BI)
1370                         up->lsr_break_flag = UART_LSR_BI;
1371
1372                 if (--tmout == 0)
1373                         break;
1374                 udelay(1);
1375         } while ((status & BOTH_EMPTY) != BOTH_EMPTY);
1376
1377         /* Wait up to 1s for flow control if necessary */
1378         if (up->port.flags & ASYNC_CONS_FLOW) {
1379                 tmout = 1000000;
1380                 while (--tmout &&
1381                        ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0))
1382                         udelay(1);
1383         }
1384 }
1385
1386 /*
1387  *      Print a string to the serial port trying not to disturb
1388  *      any possible real use of the port...
1389  */
1390 static void sunsu_console_write(struct console *co, const char *s,
1391                                 unsigned int count)
1392 {
1393         struct uart_sunsu_port *up = &sunsu_ports[co->index];
1394         unsigned int ier;
1395         int i;
1396
1397         /*
1398          *      First save the UER then disable the interrupts
1399          */
1400         ier = serial_in(up, UART_IER);
1401         serial_out(up, UART_IER, 0);
1402
1403         /*
1404          *      Now, do each character
1405          */
1406         for (i = 0; i < count; i++, s++) {
1407                 wait_for_xmitr(up);
1408
1409                 /*
1410                  *      Send the character out.
1411                  *      If a LF, also do CR...
1412                  */
1413                 serial_out(up, UART_TX, *s);
1414                 if (*s == 10) {
1415                         wait_for_xmitr(up);
1416                         serial_out(up, UART_TX, 13);
1417                 }
1418         }
1419
1420         /*
1421          *      Finally, wait for transmitter to become empty
1422          *      and restore the IER
1423          */
1424         wait_for_xmitr(up);
1425         serial_out(up, UART_IER, ier);
1426 }
1427
1428 /*
1429  *      Setup initial baud/bits/parity. We do two things here:
1430  *      - construct a cflag setting for the first su_open()
1431  *      - initialize the serial port
1432  *      Return non-zero if we didn't find a serial port.
1433  */
1434 static int __init sunsu_console_setup(struct console *co, char *options)
1435 {
1436         struct uart_port *port;
1437         int baud = 9600;
1438         int bits = 8;
1439         int parity = 'n';
1440         int flow = 'n';
1441
1442         printk("Console: ttyS%d (SU)\n",
1443                (sunsu_reg.minor - 64) + co->index);
1444
1445         /*
1446          * Check whether an invalid uart number has been specified, and
1447          * if so, search for the first available port that does have
1448          * console support.
1449          */
1450         if (co->index >= UART_NR)
1451                 co->index = 0;
1452         port = &sunsu_ports[co->index].port;
1453
1454         /*
1455          * Temporary fix.
1456          */
1457         spin_lock_init(&port->lock);
1458
1459         if (options)
1460                 uart_parse_options(options, &baud, &parity, &bits, &flow);
1461
1462         return uart_set_options(port, co, baud, parity, bits, flow);
1463 }
1464
1465 static struct console sunsu_cons = {
1466         .name   =       "ttyS",
1467         .write  =       sunsu_console_write,
1468         .device =       uart_console_device,
1469         .setup  =       sunsu_console_setup,
1470         .flags  =       CON_PRINTBUFFER,
1471         .index  =       -1,
1472         .data   =       &sunsu_reg,
1473 };
1474 #define SUNSU_CONSOLE   (&sunsu_cons)
1475
1476 /*
1477  *      Register console.
1478  */
1479
1480 static int __init sunsu_serial_console_init(void)
1481 {
1482         int i;
1483
1484         if (con_is_present())
1485                 return 0;
1486
1487         for (i = 0; i < UART_NR; i++) {
1488                 int this_minor = sunsu_reg.minor + i;
1489
1490                 if ((this_minor - 64) == (serial_console - 1))
1491                         break;
1492         }
1493         if (i == UART_NR)
1494                 return 0;
1495         if (sunsu_ports[i].port_node == 0)
1496                 return 0;
1497
1498         sunsu_cons.index = i;
1499         register_console(&sunsu_cons);
1500         return 0;
1501 }
1502 #else
1503 #define SUNSU_CONSOLE                   (NULL)
1504 #define sunsu_serial_console_init()     do { } while (0)
1505 #endif
1506
1507 static int __init sunsu_serial_init(void)
1508 {
1509         int instance, ret, i;
1510
1511         /* How many instances do we need?  */
1512         instance = 0;
1513         for (i = 0; i < UART_NR; i++) {
1514                 struct uart_sunsu_port *up = &sunsu_ports[i];
1515
1516                 if (up->su_type == SU_PORT_MS ||
1517                     up->su_type == SU_PORT_KBD)
1518                         continue;
1519
1520                 up->port.flags |= ASYNC_BOOT_AUTOCONF;
1521                 up->port.type = PORT_UNKNOWN;
1522                 up->port.uartclk = (SU_BASE_BAUD * 16);
1523
1524                 sunsu_autoconfig(up);
1525                 if (up->port.type == PORT_UNKNOWN)
1526                         continue;
1527
1528                 up->port.line = instance++;
1529                 up->port.ops = &sunsu_pops;
1530         }
1531
1532         sunsu_reg.minor = sunserial_current_minor;
1533         sunserial_current_minor += instance;
1534
1535         sunsu_reg.nr = instance;
1536         sunsu_reg.cons = SUNSU_CONSOLE;
1537
1538         ret = uart_register_driver(&sunsu_reg);
1539         if (ret < 0)
1540                 return ret;
1541
1542         sunsu_serial_console_init();
1543         for (i = 0; i < UART_NR; i++) {
1544                 struct uart_sunsu_port *up = &sunsu_ports[i];
1545
1546                 /* Do not register Keyboard/Mouse lines with UART
1547                  * layer.
1548                  */
1549                 if (up->su_type == SU_PORT_MS ||
1550                     up->su_type == SU_PORT_KBD)
1551                         continue;
1552
1553                 if (up->port.type == PORT_UNKNOWN)
1554                         continue;
1555
1556                 uart_add_one_port(&sunsu_reg, &up->port);
1557         }
1558
1559         return 0;
1560 }
1561
1562 static int su_node_ok(int node, char *name, int namelen)
1563 {
1564         if (strncmp(name, "su", namelen) == 0 ||
1565             strncmp(name, "su_pnp", namelen) == 0)
1566                 return 1;
1567
1568         if (strncmp(name, "serial", namelen) == 0) {
1569                 char compat[32];
1570                 int clen;
1571
1572                 /* Is it _really_ a 'su' device? */
1573                 clen = prom_getproperty(node, "compatible", compat, sizeof(compat));
1574                 if (clen > 0) {
1575                         if (strncmp(compat, "sab82532", 8) == 0) {
1576                                 /* Nope, Siemens serial, not for us. */
1577                                 return 0;
1578                         }
1579                 }
1580                 return 1;
1581         }
1582
1583         return 0;
1584 }
1585
1586 #define SU_PROPSIZE     128
1587
1588 /*
1589  * Scan status structure.
1590  * "prop" is a local variable but it eats stack to keep it in each
1591  * stack frame of a recursive procedure.
1592  */
1593 struct su_probe_scan {
1594         int msnode, kbnode;     /* PROM nodes for mouse and keyboard */
1595         int msx, kbx;           /* minors for mouse and keyboard */
1596         int devices;            /* scan index */
1597         char prop[SU_PROPSIZE];
1598 };
1599
1600 /*
1601  * We have several platforms which present 'su' in different parts
1602  * of the device tree. 'su' may be found under obio, ebus, isa and pci.
1603  * We walk over the tree and find them wherever PROM hides them.
1604  */
1605 static void __init su_probe_any(struct su_probe_scan *t, int sunode)
1606 {
1607         struct uart_sunsu_port *up;
1608         int len;
1609
1610         if (t->devices >= UART_NR)
1611                 return;
1612
1613         for (; sunode != 0; sunode = prom_getsibling(sunode)) {
1614                 len = prom_getproperty(sunode, "name", t->prop, SU_PROPSIZE);
1615                 if (len <= 1)
1616                         continue;               /* Broken PROM node */
1617
1618                 if (su_node_ok(sunode, t->prop, len)) {
1619                         up = &sunsu_ports[t->devices];
1620                         if (t->kbnode != 0 && sunode == t->kbnode) {
1621                                 t->kbx = t->devices;
1622                                 up->su_type = SU_PORT_KBD;
1623                         } else if (t->msnode != 0 && sunode == t->msnode) {
1624                                 t->msx = t->devices;
1625                                 up->su_type = SU_PORT_MS;
1626                         } else {
1627 #ifdef CONFIG_SPARC64
1628                                 /*
1629                                  * Do not attempt to use the truncated
1630                                  * keyboard/mouse ports as serial ports
1631                                  * on Ultras with PC keyboard attached.
1632                                  */
1633                                 if (prom_getbool(sunode, "mouse"))
1634                                         continue;
1635                                 if (prom_getbool(sunode, "keyboard"))
1636                                         continue;
1637 #endif
1638                                 up->su_type = SU_PORT_PORT;
1639                         }
1640                         up->port_node = sunode;
1641                         ++t->devices;
1642                 } else {
1643                         su_probe_any(t, prom_getchild(sunode));
1644                 }
1645         }
1646 }
1647
1648 static int __init sunsu_probe(void)
1649 {
1650         int node;
1651         int len;
1652         struct su_probe_scan scan;
1653
1654         /*
1655          * First, we scan the tree.
1656          */
1657         scan.devices = 0;
1658         scan.msx = -1;
1659         scan.kbx = -1;
1660         scan.kbnode = 0;
1661         scan.msnode = 0;
1662
1663         /*
1664          * Get the nodes for keyboard and mouse from 'aliases'...
1665          */
1666         node = prom_getchild(prom_root_node);
1667         node = prom_searchsiblings(node, "aliases");
1668         if (node != 0) {
1669                 len = prom_getproperty(node, "keyboard", scan.prop, SU_PROPSIZE);
1670                 if (len > 0) {
1671                         scan.prop[len] = 0;
1672                         scan.kbnode = prom_finddevice(scan.prop);
1673                 }
1674
1675                 len = prom_getproperty(node, "mouse", scan.prop, SU_PROPSIZE);
1676                 if (len > 0) {
1677                         scan.prop[len] = 0;
1678                         scan.msnode = prom_finddevice(scan.prop);
1679                 }
1680         }
1681
1682         su_probe_any(&scan, prom_getchild(prom_root_node));
1683
1684         /*
1685          * Second, we process the special case of keyboard and mouse.
1686          *
1687          * Currently if we got keyboard and mouse hooked to "su" ports
1688          * we do not use any possible remaining "su" as a serial port.
1689          * Thus, we ignore values of .msx and .kbx, then compact ports.
1690          */
1691         if (scan.msx != -1 && scan.kbx != -1) {
1692                 sunsu_ports[0].su_type = SU_PORT_MS;
1693                 sunsu_ports[0].port_node = scan.msnode;
1694                 sunsu_kbd_ms_init(&sunsu_ports[0], 0);
1695
1696                 sunsu_ports[1].su_type = SU_PORT_KBD;
1697                 sunsu_ports[1].port_node = scan.kbnode;
1698                 sunsu_kbd_ms_init(&sunsu_ports[1], 1);
1699
1700                 return 0;
1701         }
1702
1703         if (scan.msx != -1 || scan.kbx != -1) {
1704                 printk("sunsu_probe: cannot match keyboard and mouse, confused\n");
1705                 return -ENODEV;
1706         }
1707
1708         if (scan.devices == 0)
1709                 return -ENODEV;
1710
1711         /*
1712          * Console must be initiated after the generic initialization.
1713          */
1714         sunsu_serial_init();
1715
1716         return 0;
1717 }
1718
1719 static void __exit sunsu_exit(void)
1720 {
1721         int i, saw_uart;
1722
1723         saw_uart = 0;
1724         for (i = 0; i < UART_NR; i++) {
1725                 struct uart_sunsu_port *up = &sunsu_ports[i];
1726
1727                 if (up->su_type == SU_PORT_MS ||
1728                     up->su_type == SU_PORT_KBD) {
1729 #ifdef CONFIG_SERIO
1730                         if (up->serio) {
1731                                 serio_unregister_port(up->serio);
1732                                 up->serio = NULL;
1733                         }
1734 #endif
1735                 } else if (up->port.type != PORT_UNKNOWN) {
1736                         uart_remove_one_port(&sunsu_reg, &up->port);
1737                         saw_uart++;
1738                 }
1739         }
1740
1741         if (saw_uart)
1742                 uart_unregister_driver(&sunsu_reg);
1743 }
1744
1745 module_init(sunsu_probe);
1746 module_exit(sunsu_exit);