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1da177e4 LT |
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) { | |
9b4a1617 | 112 | case UPIO_HUB6: |
1da177e4 LT |
113 | outb(up->port.hub6 - 1 + offset, up->port.iobase); |
114 | return inb(up->port.iobase + 1); | |
115 | ||
9b4a1617 | 116 | case UPIO_MEM: |
1da177e4 LT |
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) { | |
9b4a1617 | 142 | case UPIO_HUB6: |
1da177e4 LT |
143 | outb(up->port.hub6 - 1 + offset, up->port.iobase); |
144 | outb(value, up->port.iobase + 1); | |
145 | break; | |
146 | ||
9b4a1617 | 147 | case UPIO_MEM: |
1da177e4 LT |
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 | ||
b129a8cc RK |
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) | |
1da177e4 LT |
267 | { |
268 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; | |
269 | ||
b129a8cc RK |
270 | __stop_tx(up); |
271 | ||
3d9c9948 AV |
272 | /* |
273 | * We really want to stop the transmitter from sending. | |
274 | */ | |
275 | if (up->port.type == PORT_16C950) { | |
1da177e4 LT |
276 | up->acr |= UART_ACR_TXDIS; |
277 | serial_icr_write(up, UART_ACR, up->acr); | |
278 | } | |
279 | } | |
280 | ||
b129a8cc | 281 | static void sunsu_start_tx(struct uart_port *port) |
1da177e4 LT |
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 | } | |
3d9c9948 | 289 | |
1da177e4 | 290 | /* |
3d9c9948 | 291 | * Re-enable the transmitter if we disabled it. |
1da177e4 | 292 | */ |
3d9c9948 | 293 | if (up->port.type == PORT_16C950 && up->acr & UART_ACR_TXDIS) { |
1da177e4 LT |
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; | |
1da177e4 | 302 | |
1da177e4 LT |
303 | up->ier &= ~UART_IER_RLSI; |
304 | up->port.read_status_mask &= ~UART_LSR_DR; | |
305 | serial_out(up, UART_IER, up->ier); | |
1da177e4 LT |
306 | } |
307 | ||
308 | static void sunsu_enable_ms(struct uart_port *port) | |
309 | { | |
310 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; | |
311 | unsigned long flags; | |
312 | ||
313 | spin_lock_irqsave(&up->port.lock, flags); | |
314 | up->ier |= UART_IER_MSI; | |
315 | serial_out(up, UART_IER, up->ier); | |
316 | spin_unlock_irqrestore(&up->port.lock, flags); | |
317 | } | |
318 | ||
319 | static _INLINE_ struct tty_struct * | |
320 | receive_chars(struct uart_sunsu_port *up, unsigned char *status, struct pt_regs *regs) | |
321 | { | |
322 | struct tty_struct *tty = up->port.info->tty; | |
33f0f88f | 323 | unsigned char ch, flag; |
1da177e4 LT |
324 | int max_count = 256; |
325 | int saw_console_brk = 0; | |
326 | ||
327 | do { | |
1da177e4 | 328 | ch = serial_inp(up, UART_RX); |
33f0f88f | 329 | flag = TTY_NORMAL; |
1da177e4 LT |
330 | up->port.icount.rx++; |
331 | ||
332 | if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE | | |
333 | UART_LSR_FE | UART_LSR_OE))) { | |
334 | /* | |
335 | * For statistics only | |
336 | */ | |
337 | if (*status & UART_LSR_BI) { | |
338 | *status &= ~(UART_LSR_FE | UART_LSR_PE); | |
339 | up->port.icount.brk++; | |
340 | if (up->port.cons != NULL && | |
341 | up->port.line == up->port.cons->index) | |
342 | saw_console_brk = 1; | |
343 | /* | |
344 | * We do the SysRQ and SAK checking | |
345 | * here because otherwise the break | |
346 | * may get masked by ignore_status_mask | |
347 | * or read_status_mask. | |
348 | */ | |
349 | if (uart_handle_break(&up->port)) | |
350 | goto ignore_char; | |
351 | } else if (*status & UART_LSR_PE) | |
352 | up->port.icount.parity++; | |
353 | else if (*status & UART_LSR_FE) | |
354 | up->port.icount.frame++; | |
355 | if (*status & UART_LSR_OE) | |
356 | up->port.icount.overrun++; | |
357 | ||
358 | /* | |
359 | * Mask off conditions which should be ingored. | |
360 | */ | |
361 | *status &= up->port.read_status_mask; | |
362 | ||
363 | if (up->port.cons != NULL && | |
364 | up->port.line == up->port.cons->index) { | |
365 | /* Recover the break flag from console xmit */ | |
366 | *status |= up->lsr_break_flag; | |
367 | up->lsr_break_flag = 0; | |
368 | } | |
369 | ||
370 | if (*status & UART_LSR_BI) { | |
33f0f88f | 371 | flag = TTY_BREAK; |
1da177e4 | 372 | } else if (*status & UART_LSR_PE) |
33f0f88f | 373 | flag = TTY_PARITY; |
1da177e4 | 374 | else if (*status & UART_LSR_FE) |
33f0f88f | 375 | flag = TTY_FRAME; |
1da177e4 LT |
376 | } |
377 | if (uart_handle_sysrq_char(&up->port, ch, regs)) | |
378 | goto ignore_char; | |
33f0f88f AC |
379 | if ((*status & up->port.ignore_status_mask) == 0) |
380 | tty_insert_flip_char(tty, ch, flag); | |
381 | if (*status & UART_LSR_OE) | |
1da177e4 LT |
382 | /* |
383 | * Overrun is special, since it's reported | |
384 | * immediately, and doesn't affect the current | |
385 | * character. | |
386 | */ | |
33f0f88f | 387 | tty_insert_flip_char(tty, 0, TTY_OVERRUN); |
1da177e4 LT |
388 | ignore_char: |
389 | *status = serial_inp(up, UART_LSR); | |
390 | } while ((*status & UART_LSR_DR) && (max_count-- > 0)); | |
391 | ||
392 | if (saw_console_brk) | |
393 | sun_do_break(); | |
394 | ||
395 | return tty; | |
396 | } | |
397 | ||
398 | static _INLINE_ void transmit_chars(struct uart_sunsu_port *up) | |
399 | { | |
400 | struct circ_buf *xmit = &up->port.info->xmit; | |
401 | int count; | |
402 | ||
403 | if (up->port.x_char) { | |
404 | serial_outp(up, UART_TX, up->port.x_char); | |
405 | up->port.icount.tx++; | |
406 | up->port.x_char = 0; | |
407 | return; | |
408 | } | |
b129a8cc RK |
409 | if (uart_tx_stopped(&up->port)) { |
410 | sunsu_stop_tx(&up->port); | |
411 | return; | |
412 | } | |
413 | if (uart_circ_empty(xmit)) { | |
414 | __stop_tx(up); | |
1da177e4 LT |
415 | return; |
416 | } | |
417 | ||
418 | count = up->port.fifosize; | |
419 | do { | |
420 | serial_out(up, UART_TX, xmit->buf[xmit->tail]); | |
421 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); | |
422 | up->port.icount.tx++; | |
423 | if (uart_circ_empty(xmit)) | |
424 | break; | |
425 | } while (--count > 0); | |
426 | ||
427 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
428 | uart_write_wakeup(&up->port); | |
429 | ||
430 | if (uart_circ_empty(xmit)) | |
b129a8cc | 431 | __stop_tx(up); |
1da177e4 LT |
432 | } |
433 | ||
434 | static _INLINE_ void check_modem_status(struct uart_sunsu_port *up) | |
435 | { | |
436 | int status; | |
437 | ||
438 | status = serial_in(up, UART_MSR); | |
439 | ||
440 | if ((status & UART_MSR_ANY_DELTA) == 0) | |
441 | return; | |
442 | ||
443 | if (status & UART_MSR_TERI) | |
444 | up->port.icount.rng++; | |
445 | if (status & UART_MSR_DDSR) | |
446 | up->port.icount.dsr++; | |
447 | if (status & UART_MSR_DDCD) | |
448 | uart_handle_dcd_change(&up->port, status & UART_MSR_DCD); | |
449 | if (status & UART_MSR_DCTS) | |
450 | uart_handle_cts_change(&up->port, status & UART_MSR_CTS); | |
451 | ||
452 | wake_up_interruptible(&up->port.info->delta_msr_wait); | |
453 | } | |
454 | ||
455 | static irqreturn_t sunsu_serial_interrupt(int irq, void *dev_id, struct pt_regs *regs) | |
456 | { | |
457 | struct uart_sunsu_port *up = dev_id; | |
458 | unsigned long flags; | |
459 | unsigned char status; | |
460 | ||
461 | spin_lock_irqsave(&up->port.lock, flags); | |
462 | ||
463 | do { | |
464 | struct tty_struct *tty; | |
465 | ||
466 | status = serial_inp(up, UART_LSR); | |
467 | tty = NULL; | |
468 | if (status & UART_LSR_DR) | |
469 | tty = receive_chars(up, &status, regs); | |
470 | check_modem_status(up); | |
471 | if (status & UART_LSR_THRE) | |
472 | transmit_chars(up); | |
473 | ||
474 | spin_unlock_irqrestore(&up->port.lock, flags); | |
475 | ||
476 | if (tty) | |
477 | tty_flip_buffer_push(tty); | |
478 | ||
479 | spin_lock_irqsave(&up->port.lock, flags); | |
480 | ||
481 | } while (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT)); | |
482 | ||
483 | spin_unlock_irqrestore(&up->port.lock, flags); | |
484 | ||
485 | return IRQ_HANDLED; | |
486 | } | |
487 | ||
488 | /* Separate interrupt handling path for keyboard/mouse ports. */ | |
489 | ||
490 | static void | |
491 | sunsu_change_speed(struct uart_port *port, unsigned int cflag, | |
492 | unsigned int iflag, unsigned int quot); | |
493 | ||
494 | static void sunsu_change_mouse_baud(struct uart_sunsu_port *up) | |
495 | { | |
496 | unsigned int cur_cflag = up->cflag; | |
497 | int quot, new_baud; | |
498 | ||
499 | up->cflag &= ~CBAUD; | |
500 | up->cflag |= suncore_mouse_baud_cflag_next(cur_cflag, &new_baud); | |
501 | ||
502 | quot = up->port.uartclk / (16 * new_baud); | |
503 | ||
1da177e4 | 504 | sunsu_change_speed(&up->port, up->cflag, 0, quot); |
1da177e4 LT |
505 | } |
506 | ||
507 | static void receive_kbd_ms_chars(struct uart_sunsu_port *up, struct pt_regs *regs, int is_break) | |
508 | { | |
509 | do { | |
510 | unsigned char ch = serial_inp(up, UART_RX); | |
511 | ||
512 | /* Stop-A is handled by drivers/char/keyboard.c now. */ | |
513 | if (up->su_type == SU_PORT_KBD) { | |
514 | #ifdef CONFIG_SERIO | |
515 | serio_interrupt(up->serio, ch, 0, regs); | |
516 | #endif | |
517 | } else if (up->su_type == SU_PORT_MS) { | |
518 | int ret = suncore_mouse_baud_detection(ch, is_break); | |
519 | ||
520 | switch (ret) { | |
521 | case 2: | |
522 | sunsu_change_mouse_baud(up); | |
523 | /* fallthru */ | |
524 | case 1: | |
525 | break; | |
526 | ||
527 | case 0: | |
528 | #ifdef CONFIG_SERIO | |
529 | serio_interrupt(up->serio, ch, 0, regs); | |
530 | #endif | |
531 | break; | |
532 | }; | |
533 | } | |
534 | } while (serial_in(up, UART_LSR) & UART_LSR_DR); | |
535 | } | |
536 | ||
537 | static irqreturn_t sunsu_kbd_ms_interrupt(int irq, void *dev_id, struct pt_regs *regs) | |
538 | { | |
539 | struct uart_sunsu_port *up = dev_id; | |
540 | ||
541 | if (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT)) { | |
542 | unsigned char status = serial_inp(up, UART_LSR); | |
543 | ||
544 | if ((status & UART_LSR_DR) || (status & UART_LSR_BI)) | |
545 | receive_kbd_ms_chars(up, regs, | |
546 | (status & UART_LSR_BI) != 0); | |
547 | } | |
548 | ||
549 | return IRQ_HANDLED; | |
550 | } | |
551 | ||
552 | static unsigned int sunsu_tx_empty(struct uart_port *port) | |
553 | { | |
554 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; | |
555 | unsigned long flags; | |
556 | unsigned int ret; | |
557 | ||
558 | spin_lock_irqsave(&up->port.lock, flags); | |
559 | ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0; | |
560 | spin_unlock_irqrestore(&up->port.lock, flags); | |
561 | ||
562 | return ret; | |
563 | } | |
564 | ||
565 | static unsigned int sunsu_get_mctrl(struct uart_port *port) | |
566 | { | |
567 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; | |
1da177e4 LT |
568 | unsigned char status; |
569 | unsigned int ret; | |
570 | ||
1da177e4 | 571 | status = serial_in(up, UART_MSR); |
1da177e4 LT |
572 | |
573 | ret = 0; | |
574 | if (status & UART_MSR_DCD) | |
575 | ret |= TIOCM_CAR; | |
576 | if (status & UART_MSR_RI) | |
577 | ret |= TIOCM_RNG; | |
578 | if (status & UART_MSR_DSR) | |
579 | ret |= TIOCM_DSR; | |
580 | if (status & UART_MSR_CTS) | |
581 | ret |= TIOCM_CTS; | |
582 | return ret; | |
583 | } | |
584 | ||
585 | static void sunsu_set_mctrl(struct uart_port *port, unsigned int mctrl) | |
586 | { | |
587 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; | |
588 | unsigned char mcr = 0; | |
589 | ||
590 | if (mctrl & TIOCM_RTS) | |
591 | mcr |= UART_MCR_RTS; | |
592 | if (mctrl & TIOCM_DTR) | |
593 | mcr |= UART_MCR_DTR; | |
594 | if (mctrl & TIOCM_OUT1) | |
595 | mcr |= UART_MCR_OUT1; | |
596 | if (mctrl & TIOCM_OUT2) | |
597 | mcr |= UART_MCR_OUT2; | |
598 | if (mctrl & TIOCM_LOOP) | |
599 | mcr |= UART_MCR_LOOP; | |
600 | ||
601 | serial_out(up, UART_MCR, mcr); | |
602 | } | |
603 | ||
604 | static void sunsu_break_ctl(struct uart_port *port, int break_state) | |
605 | { | |
606 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; | |
607 | unsigned long flags; | |
608 | ||
609 | spin_lock_irqsave(&up->port.lock, flags); | |
610 | if (break_state == -1) | |
611 | up->lcr |= UART_LCR_SBC; | |
612 | else | |
613 | up->lcr &= ~UART_LCR_SBC; | |
614 | serial_out(up, UART_LCR, up->lcr); | |
615 | spin_unlock_irqrestore(&up->port.lock, flags); | |
616 | } | |
617 | ||
618 | static int sunsu_startup(struct uart_port *port) | |
619 | { | |
620 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; | |
621 | unsigned long flags; | |
622 | int retval; | |
623 | ||
624 | if (up->port.type == PORT_16C950) { | |
625 | /* Wake up and initialize UART */ | |
626 | up->acr = 0; | |
627 | serial_outp(up, UART_LCR, 0xBF); | |
628 | serial_outp(up, UART_EFR, UART_EFR_ECB); | |
629 | serial_outp(up, UART_IER, 0); | |
630 | serial_outp(up, UART_LCR, 0); | |
631 | serial_icr_write(up, UART_CSR, 0); /* Reset the UART */ | |
632 | serial_outp(up, UART_LCR, 0xBF); | |
633 | serial_outp(up, UART_EFR, UART_EFR_ECB); | |
634 | serial_outp(up, UART_LCR, 0); | |
635 | } | |
636 | ||
637 | #ifdef CONFIG_SERIAL_8250_RSA | |
638 | /* | |
639 | * If this is an RSA port, see if we can kick it up to the | |
640 | * higher speed clock. | |
641 | */ | |
642 | enable_rsa(up); | |
643 | #endif | |
644 | ||
645 | /* | |
646 | * Clear the FIFO buffers and disable them. | |
647 | * (they will be reeanbled in set_termios()) | |
648 | */ | |
649 | if (uart_config[up->port.type].flags & UART_CLEAR_FIFO) { | |
650 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); | |
651 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO | | |
652 | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); | |
653 | serial_outp(up, UART_FCR, 0); | |
654 | } | |
655 | ||
656 | /* | |
657 | * Clear the interrupt registers. | |
658 | */ | |
659 | (void) serial_inp(up, UART_LSR); | |
660 | (void) serial_inp(up, UART_RX); | |
661 | (void) serial_inp(up, UART_IIR); | |
662 | (void) serial_inp(up, UART_MSR); | |
663 | ||
664 | /* | |
665 | * At this point, there's no way the LSR could still be 0xff; | |
666 | * if it is, then bail out, because there's likely no UART | |
667 | * here. | |
668 | */ | |
ce8337cb | 669 | if (!(up->port.flags & UPF_BUGGY_UART) && |
1da177e4 LT |
670 | (serial_inp(up, UART_LSR) == 0xff)) { |
671 | printk("ttyS%d: LSR safety check engaged!\n", up->port.line); | |
672 | return -ENODEV; | |
673 | } | |
674 | ||
675 | if (up->su_type != SU_PORT_PORT) { | |
676 | retval = request_irq(up->port.irq, sunsu_kbd_ms_interrupt, | |
677 | SA_SHIRQ, su_typev[up->su_type], up); | |
678 | } else { | |
679 | retval = request_irq(up->port.irq, sunsu_serial_interrupt, | |
680 | SA_SHIRQ, su_typev[up->su_type], up); | |
681 | } | |
682 | if (retval) { | |
683 | printk("su: Cannot register IRQ %d\n", up->port.irq); | |
684 | return retval; | |
685 | } | |
686 | ||
687 | /* | |
688 | * Now, initialize the UART | |
689 | */ | |
690 | serial_outp(up, UART_LCR, UART_LCR_WLEN8); | |
691 | ||
692 | spin_lock_irqsave(&up->port.lock, flags); | |
693 | ||
694 | up->port.mctrl |= TIOCM_OUT2; | |
695 | ||
696 | sunsu_set_mctrl(&up->port, up->port.mctrl); | |
697 | spin_unlock_irqrestore(&up->port.lock, flags); | |
698 | ||
699 | /* | |
700 | * Finally, enable interrupts. Note: Modem status interrupts | |
701 | * are set via set_termios(), which will be occurring imminently | |
702 | * anyway, so we don't enable them here. | |
703 | */ | |
704 | up->ier = UART_IER_RLSI | UART_IER_RDI; | |
705 | serial_outp(up, UART_IER, up->ier); | |
706 | ||
ce8337cb | 707 | if (up->port.flags & UPF_FOURPORT) { |
1da177e4 LT |
708 | unsigned int icp; |
709 | /* | |
710 | * Enable interrupts on the AST Fourport board | |
711 | */ | |
712 | icp = (up->port.iobase & 0xfe0) | 0x01f; | |
713 | outb_p(0x80, icp); | |
714 | (void) inb_p(icp); | |
715 | } | |
716 | ||
717 | /* | |
718 | * And clear the interrupt registers again for luck. | |
719 | */ | |
720 | (void) serial_inp(up, UART_LSR); | |
721 | (void) serial_inp(up, UART_RX); | |
722 | (void) serial_inp(up, UART_IIR); | |
723 | (void) serial_inp(up, UART_MSR); | |
724 | ||
725 | return 0; | |
726 | } | |
727 | ||
728 | static void sunsu_shutdown(struct uart_port *port) | |
729 | { | |
730 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; | |
731 | unsigned long flags; | |
732 | ||
733 | /* | |
734 | * Disable interrupts from this port | |
735 | */ | |
736 | up->ier = 0; | |
737 | serial_outp(up, UART_IER, 0); | |
738 | ||
739 | spin_lock_irqsave(&up->port.lock, flags); | |
ce8337cb | 740 | if (up->port.flags & UPF_FOURPORT) { |
1da177e4 LT |
741 | /* reset interrupts on the AST Fourport board */ |
742 | inb((up->port.iobase & 0xfe0) | 0x1f); | |
743 | up->port.mctrl |= TIOCM_OUT1; | |
744 | } else | |
745 | up->port.mctrl &= ~TIOCM_OUT2; | |
746 | ||
747 | sunsu_set_mctrl(&up->port, up->port.mctrl); | |
748 | spin_unlock_irqrestore(&up->port.lock, flags); | |
749 | ||
750 | /* | |
751 | * Disable break condition and FIFOs | |
752 | */ | |
753 | serial_out(up, UART_LCR, serial_inp(up, UART_LCR) & ~UART_LCR_SBC); | |
754 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO | | |
755 | UART_FCR_CLEAR_RCVR | | |
756 | UART_FCR_CLEAR_XMIT); | |
757 | serial_outp(up, UART_FCR, 0); | |
758 | ||
759 | #ifdef CONFIG_SERIAL_8250_RSA | |
760 | /* | |
761 | * Reset the RSA board back to 115kbps compat mode. | |
762 | */ | |
763 | disable_rsa(up); | |
764 | #endif | |
765 | ||
766 | /* | |
767 | * Read data port to reset things. | |
768 | */ | |
769 | (void) serial_in(up, UART_RX); | |
770 | ||
771 | free_irq(up->port.irq, up); | |
772 | } | |
773 | ||
774 | static void | |
775 | sunsu_change_speed(struct uart_port *port, unsigned int cflag, | |
776 | unsigned int iflag, unsigned int quot) | |
777 | { | |
778 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; | |
779 | unsigned char cval, fcr = 0; | |
780 | unsigned long flags; | |
781 | ||
782 | switch (cflag & CSIZE) { | |
783 | case CS5: | |
784 | cval = 0x00; | |
785 | break; | |
786 | case CS6: | |
787 | cval = 0x01; | |
788 | break; | |
789 | case CS7: | |
790 | cval = 0x02; | |
791 | break; | |
792 | default: | |
793 | case CS8: | |
794 | cval = 0x03; | |
795 | break; | |
796 | } | |
797 | ||
798 | if (cflag & CSTOPB) | |
799 | cval |= 0x04; | |
800 | if (cflag & PARENB) | |
801 | cval |= UART_LCR_PARITY; | |
802 | if (!(cflag & PARODD)) | |
803 | cval |= UART_LCR_EPAR; | |
804 | #ifdef CMSPAR | |
805 | if (cflag & CMSPAR) | |
806 | cval |= UART_LCR_SPAR; | |
807 | #endif | |
808 | ||
809 | /* | |
810 | * Work around a bug in the Oxford Semiconductor 952 rev B | |
811 | * chip which causes it to seriously miscalculate baud rates | |
812 | * when DLL is 0. | |
813 | */ | |
814 | if ((quot & 0xff) == 0 && up->port.type == PORT_16C950 && | |
815 | up->rev == 0x5201) | |
816 | quot ++; | |
817 | ||
818 | if (uart_config[up->port.type].flags & UART_USE_FIFO) { | |
819 | if ((up->port.uartclk / quot) < (2400 * 16)) | |
820 | fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1; | |
821 | #ifdef CONFIG_SERIAL_8250_RSA | |
822 | else if (up->port.type == PORT_RSA) | |
823 | fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_14; | |
824 | #endif | |
825 | else | |
826 | fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8; | |
827 | } | |
828 | if (up->port.type == PORT_16750) | |
829 | fcr |= UART_FCR7_64BYTE; | |
830 | ||
831 | /* | |
832 | * Ok, we're now changing the port state. Do it with | |
833 | * interrupts disabled. | |
834 | */ | |
835 | spin_lock_irqsave(&up->port.lock, flags); | |
836 | ||
837 | /* | |
838 | * Update the per-port timeout. | |
839 | */ | |
840 | uart_update_timeout(port, cflag, (port->uartclk / (16 * quot))); | |
841 | ||
842 | up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; | |
843 | if (iflag & INPCK) | |
844 | up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; | |
845 | if (iflag & (BRKINT | PARMRK)) | |
846 | up->port.read_status_mask |= UART_LSR_BI; | |
847 | ||
848 | /* | |
849 | * Characteres to ignore | |
850 | */ | |
851 | up->port.ignore_status_mask = 0; | |
852 | if (iflag & IGNPAR) | |
853 | up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; | |
854 | if (iflag & IGNBRK) { | |
855 | up->port.ignore_status_mask |= UART_LSR_BI; | |
856 | /* | |
857 | * If we're ignoring parity and break indicators, | |
858 | * ignore overruns too (for real raw support). | |
859 | */ | |
860 | if (iflag & IGNPAR) | |
861 | up->port.ignore_status_mask |= UART_LSR_OE; | |
862 | } | |
863 | ||
864 | /* | |
865 | * ignore all characters if CREAD is not set | |
866 | */ | |
867 | if ((cflag & CREAD) == 0) | |
868 | up->port.ignore_status_mask |= UART_LSR_DR; | |
869 | ||
870 | /* | |
871 | * CTS flow control flag and modem status interrupts | |
872 | */ | |
873 | up->ier &= ~UART_IER_MSI; | |
874 | if (UART_ENABLE_MS(&up->port, cflag)) | |
875 | up->ier |= UART_IER_MSI; | |
876 | ||
877 | serial_out(up, UART_IER, up->ier); | |
878 | ||
879 | if (uart_config[up->port.type].flags & UART_STARTECH) { | |
880 | serial_outp(up, UART_LCR, 0xBF); | |
881 | serial_outp(up, UART_EFR, cflag & CRTSCTS ? UART_EFR_CTS :0); | |
882 | } | |
883 | serial_outp(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */ | |
884 | serial_outp(up, UART_DLL, quot & 0xff); /* LS of divisor */ | |
885 | serial_outp(up, UART_DLM, quot >> 8); /* MS of divisor */ | |
886 | if (up->port.type == PORT_16750) | |
887 | serial_outp(up, UART_FCR, fcr); /* set fcr */ | |
888 | serial_outp(up, UART_LCR, cval); /* reset DLAB */ | |
889 | up->lcr = cval; /* Save LCR */ | |
890 | if (up->port.type != PORT_16750) { | |
891 | if (fcr & UART_FCR_ENABLE_FIFO) { | |
892 | /* emulated UARTs (Lucent Venus 167x) need two steps */ | |
893 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); | |
894 | } | |
895 | serial_outp(up, UART_FCR, fcr); /* set fcr */ | |
896 | } | |
897 | ||
898 | up->cflag = cflag; | |
899 | ||
900 | spin_unlock_irqrestore(&up->port.lock, flags); | |
901 | } | |
902 | ||
903 | static void | |
904 | sunsu_set_termios(struct uart_port *port, struct termios *termios, | |
905 | struct termios *old) | |
906 | { | |
907 | unsigned int baud, quot; | |
908 | ||
909 | /* | |
910 | * Ask the core to calculate the divisor for us. | |
911 | */ | |
912 | baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); | |
913 | quot = uart_get_divisor(port, baud); | |
914 | ||
915 | sunsu_change_speed(port, termios->c_cflag, termios->c_iflag, quot); | |
916 | } | |
917 | ||
918 | static void sunsu_release_port(struct uart_port *port) | |
919 | { | |
920 | } | |
921 | ||
922 | static int sunsu_request_port(struct uart_port *port) | |
923 | { | |
924 | return 0; | |
925 | } | |
926 | ||
927 | static void sunsu_config_port(struct uart_port *port, int flags) | |
928 | { | |
929 | struct uart_sunsu_port *up = (struct uart_sunsu_port *) port; | |
930 | ||
931 | if (flags & UART_CONFIG_TYPE) { | |
932 | /* | |
933 | * We are supposed to call autoconfig here, but this requires | |
934 | * splitting all the OBP probing crap from the UART probing. | |
935 | * We'll do it when we kill sunsu.c altogether. | |
936 | */ | |
937 | port->type = up->type_probed; /* XXX */ | |
938 | } | |
939 | } | |
940 | ||
941 | static int | |
942 | sunsu_verify_port(struct uart_port *port, struct serial_struct *ser) | |
943 | { | |
944 | return -EINVAL; | |
945 | } | |
946 | ||
947 | static const char * | |
948 | sunsu_type(struct uart_port *port) | |
949 | { | |
950 | int type = port->type; | |
951 | ||
952 | if (type >= ARRAY_SIZE(uart_config)) | |
953 | type = 0; | |
954 | return uart_config[type].name; | |
955 | } | |
956 | ||
957 | static struct uart_ops sunsu_pops = { | |
958 | .tx_empty = sunsu_tx_empty, | |
959 | .set_mctrl = sunsu_set_mctrl, | |
960 | .get_mctrl = sunsu_get_mctrl, | |
961 | .stop_tx = sunsu_stop_tx, | |
962 | .start_tx = sunsu_start_tx, | |
963 | .stop_rx = sunsu_stop_rx, | |
964 | .enable_ms = sunsu_enable_ms, | |
965 | .break_ctl = sunsu_break_ctl, | |
966 | .startup = sunsu_startup, | |
967 | .shutdown = sunsu_shutdown, | |
968 | .set_termios = sunsu_set_termios, | |
969 | .type = sunsu_type, | |
970 | .release_port = sunsu_release_port, | |
971 | .request_port = sunsu_request_port, | |
972 | .config_port = sunsu_config_port, | |
973 | .verify_port = sunsu_verify_port, | |
974 | }; | |
975 | ||
976 | #define UART_NR 4 | |
977 | ||
978 | static struct uart_sunsu_port sunsu_ports[UART_NR]; | |
979 | ||
980 | #ifdef CONFIG_SERIO | |
981 | ||
982 | static DEFINE_SPINLOCK(sunsu_serio_lock); | |
983 | ||
984 | static int sunsu_serio_write(struct serio *serio, unsigned char ch) | |
985 | { | |
986 | struct uart_sunsu_port *up = serio->port_data; | |
987 | unsigned long flags; | |
988 | int lsr; | |
989 | ||
990 | spin_lock_irqsave(&sunsu_serio_lock, flags); | |
991 | ||
992 | do { | |
993 | lsr = serial_in(up, UART_LSR); | |
994 | } while (!(lsr & UART_LSR_THRE)); | |
995 | ||
996 | /* Send the character out. */ | |
997 | serial_out(up, UART_TX, ch); | |
998 | ||
999 | spin_unlock_irqrestore(&sunsu_serio_lock, flags); | |
1000 | ||
1001 | return 0; | |
1002 | } | |
1003 | ||
1004 | static int sunsu_serio_open(struct serio *serio) | |
1005 | { | |
1006 | struct uart_sunsu_port *up = serio->port_data; | |
1007 | unsigned long flags; | |
1008 | int ret; | |
1009 | ||
1010 | spin_lock_irqsave(&sunsu_serio_lock, flags); | |
1011 | if (!up->serio_open) { | |
1012 | up->serio_open = 1; | |
1013 | ret = 0; | |
1014 | } else | |
1015 | ret = -EBUSY; | |
1016 | spin_unlock_irqrestore(&sunsu_serio_lock, flags); | |
1017 | ||
1018 | return ret; | |
1019 | } | |
1020 | ||
1021 | static void sunsu_serio_close(struct serio *serio) | |
1022 | { | |
1023 | struct uart_sunsu_port *up = serio->port_data; | |
1024 | unsigned long flags; | |
1025 | ||
1026 | spin_lock_irqsave(&sunsu_serio_lock, flags); | |
1027 | up->serio_open = 0; | |
1028 | spin_unlock_irqrestore(&sunsu_serio_lock, flags); | |
1029 | } | |
1030 | ||
1031 | #endif /* CONFIG_SERIO */ | |
1032 | ||
1033 | static void sunsu_autoconfig(struct uart_sunsu_port *up) | |
1034 | { | |
1035 | unsigned char status1, status2, scratch, scratch2, scratch3; | |
1036 | unsigned char save_lcr, save_mcr; | |
1037 | struct linux_ebus_device *dev = NULL; | |
1038 | struct linux_ebus *ebus; | |
1039 | #ifdef CONFIG_SPARC64 | |
1040 | struct sparc_isa_bridge *isa_br; | |
1041 | struct sparc_isa_device *isa_dev; | |
1042 | #endif | |
1043 | #ifndef CONFIG_SPARC64 | |
1044 | struct linux_prom_registers reg0; | |
1045 | #endif | |
1046 | unsigned long flags; | |
1047 | ||
1048 | if (!up->port_node || !up->su_type) | |
1049 | return; | |
1050 | ||
1051 | up->type_probed = PORT_UNKNOWN; | |
9b4a1617 | 1052 | up->port.iotype = UPIO_MEM; |
1da177e4 LT |
1053 | |
1054 | /* | |
1055 | * First we look for Ebus-bases su's | |
1056 | */ | |
1057 | for_each_ebus(ebus) { | |
1058 | for_each_ebusdev(dev, ebus) { | |
1059 | if (dev->prom_node == up->port_node) { | |
1060 | /* | |
1061 | * The EBus is broken on sparc; it delivers | |
1062 | * virtual addresses in resources. Oh well... | |
1063 | * This is correct on sparc64, though. | |
1064 | */ | |
1065 | up->port.membase = (char *) dev->resource[0].start; | |
1066 | /* | |
1067 | * This is correct on both architectures. | |
1068 | */ | |
1069 | up->port.mapbase = dev->resource[0].start; | |
1070 | up->port.irq = dev->irqs[0]; | |
1071 | goto ebus_done; | |
1072 | } | |
1073 | } | |
1074 | } | |
1075 | ||
1076 | #ifdef CONFIG_SPARC64 | |
1077 | for_each_isa(isa_br) { | |
1078 | for_each_isadev(isa_dev, isa_br) { | |
1079 | if (isa_dev->prom_node == up->port_node) { | |
1080 | /* Same on sparc64. Cool architecure... */ | |
1081 | up->port.membase = (char *) isa_dev->resource.start; | |
1082 | up->port.mapbase = isa_dev->resource.start; | |
1083 | up->port.irq = isa_dev->irq; | |
1084 | goto ebus_done; | |
1085 | } | |
1086 | } | |
1087 | } | |
1088 | #endif | |
1089 | ||
1090 | #ifdef CONFIG_SPARC64 | |
1091 | /* | |
1092 | * Not on Ebus, bailing. | |
1093 | */ | |
1094 | return; | |
1095 | #else | |
1096 | /* | |
1097 | * Not on Ebus, must be OBIO. | |
1098 | */ | |
1099 | if (prom_getproperty(up->port_node, "reg", | |
1100 | (char *)®0, sizeof(reg0)) == -1) { | |
1101 | prom_printf("sunsu: no \"reg\" property\n"); | |
1102 | return; | |
1103 | } | |
1104 | prom_apply_obio_ranges(®0, 1); | |
1105 | if (reg0.which_io != 0) { /* Just in case... */ | |
1106 | prom_printf("sunsu: bus number nonzero: 0x%x:%x\n", | |
1107 | reg0.which_io, reg0.phys_addr); | |
1108 | return; | |
1109 | } | |
1110 | up->port.mapbase = reg0.phys_addr; | |
1111 | if ((up->port.membase = ioremap(reg0.phys_addr, reg0.reg_size)) == 0) { | |
1112 | prom_printf("sunsu: Cannot map registers.\n"); | |
1113 | return; | |
1114 | } | |
1115 | ||
1116 | /* | |
1117 | * 0x20 is sun4m thing, Dave Redman heritage. | |
1118 | * See arch/sparc/kernel/irq.c. | |
1119 | */ | |
1120 | #define IRQ_4M(n) ((n)|0x20) | |
1121 | ||
1122 | /* | |
1123 | * There is no intr property on MrCoffee, so hardwire it. | |
1124 | */ | |
1125 | up->port.irq = IRQ_4M(13); | |
1126 | #endif | |
1127 | ||
1128 | ebus_done: | |
1129 | ||
1130 | spin_lock_irqsave(&up->port.lock, flags); | |
1131 | ||
ce8337cb | 1132 | if (!(up->port.flags & UPF_BUGGY_UART)) { |
1da177e4 LT |
1133 | /* |
1134 | * Do a simple existence test first; if we fail this, there's | |
1135 | * no point trying anything else. | |
1136 | * | |
1137 | * 0x80 is used as a nonsense port to prevent against false | |
1138 | * positives due to ISA bus float. The assumption is that | |
1139 | * 0x80 is a non-existent port; which should be safe since | |
1140 | * include/asm/io.h also makes this assumption. | |
1141 | */ | |
1142 | scratch = serial_inp(up, UART_IER); | |
1143 | serial_outp(up, UART_IER, 0); | |
1144 | #ifdef __i386__ | |
1145 | outb(0xff, 0x080); | |
1146 | #endif | |
1147 | scratch2 = serial_inp(up, UART_IER); | |
1148 | serial_outp(up, UART_IER, 0x0f); | |
1149 | #ifdef __i386__ | |
1150 | outb(0, 0x080); | |
1151 | #endif | |
1152 | scratch3 = serial_inp(up, UART_IER); | |
1153 | serial_outp(up, UART_IER, scratch); | |
1154 | if (scratch2 != 0 || scratch3 != 0x0F) | |
1155 | goto out; /* We failed; there's nothing here */ | |
1156 | } | |
1157 | ||
1158 | save_mcr = serial_in(up, UART_MCR); | |
1159 | save_lcr = serial_in(up, UART_LCR); | |
1160 | ||
1161 | /* | |
1162 | * Check to see if a UART is really there. Certain broken | |
1163 | * internal modems based on the Rockwell chipset fail this | |
1164 | * test, because they apparently don't implement the loopback | |
1165 | * test mode. So this test is skipped on the COM 1 through | |
1166 | * COM 4 ports. This *should* be safe, since no board | |
1167 | * manufacturer would be stupid enough to design a board | |
1168 | * that conflicts with COM 1-4 --- we hope! | |
1169 | */ | |
ce8337cb | 1170 | if (!(up->port.flags & UPF_SKIP_TEST)) { |
1da177e4 LT |
1171 | serial_outp(up, UART_MCR, UART_MCR_LOOP | 0x0A); |
1172 | status1 = serial_inp(up, UART_MSR) & 0xF0; | |
1173 | serial_outp(up, UART_MCR, save_mcr); | |
1174 | if (status1 != 0x90) | |
1175 | goto out; /* We failed loopback test */ | |
1176 | } | |
1177 | serial_outp(up, UART_LCR, 0xBF); /* set up for StarTech test */ | |
1178 | serial_outp(up, UART_EFR, 0); /* EFR is the same as FCR */ | |
1179 | serial_outp(up, UART_LCR, 0); | |
1180 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); | |
1181 | scratch = serial_in(up, UART_IIR) >> 6; | |
1182 | switch (scratch) { | |
1183 | case 0: | |
1184 | up->port.type = PORT_16450; | |
1185 | break; | |
1186 | case 1: | |
1187 | up->port.type = PORT_UNKNOWN; | |
1188 | break; | |
1189 | case 2: | |
1190 | up->port.type = PORT_16550; | |
1191 | break; | |
1192 | case 3: | |
1193 | up->port.type = PORT_16550A; | |
1194 | break; | |
1195 | } | |
1196 | if (up->port.type == PORT_16550A) { | |
1197 | /* Check for Startech UART's */ | |
1198 | serial_outp(up, UART_LCR, UART_LCR_DLAB); | |
1199 | if (serial_in(up, UART_EFR) == 0) { | |
1200 | up->port.type = PORT_16650; | |
1201 | } else { | |
1202 | serial_outp(up, UART_LCR, 0xBF); | |
1203 | if (serial_in(up, UART_EFR) == 0) | |
1204 | up->port.type = PORT_16650V2; | |
1205 | } | |
1206 | } | |
1207 | if (up->port.type == PORT_16550A) { | |
1208 | /* Check for TI 16750 */ | |
1209 | serial_outp(up, UART_LCR, save_lcr | UART_LCR_DLAB); | |
1210 | serial_outp(up, UART_FCR, | |
1211 | UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); | |
1212 | scratch = serial_in(up, UART_IIR) >> 5; | |
1213 | if (scratch == 7) { | |
1214 | /* | |
1215 | * If this is a 16750, and not a cheap UART | |
1216 | * clone, then it should only go into 64 byte | |
1217 | * mode if the UART_FCR7_64BYTE bit was set | |
1218 | * while UART_LCR_DLAB was latched. | |
1219 | */ | |
1220 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); | |
1221 | serial_outp(up, UART_LCR, 0); | |
1222 | serial_outp(up, UART_FCR, | |
1223 | UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); | |
1224 | scratch = serial_in(up, UART_IIR) >> 5; | |
1225 | if (scratch == 6) | |
1226 | up->port.type = PORT_16750; | |
1227 | } | |
1228 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); | |
1229 | } | |
1230 | serial_outp(up, UART_LCR, save_lcr); | |
1231 | if (up->port.type == PORT_16450) { | |
1232 | scratch = serial_in(up, UART_SCR); | |
1233 | serial_outp(up, UART_SCR, 0xa5); | |
1234 | status1 = serial_in(up, UART_SCR); | |
1235 | serial_outp(up, UART_SCR, 0x5a); | |
1236 | status2 = serial_in(up, UART_SCR); | |
1237 | serial_outp(up, UART_SCR, scratch); | |
1238 | ||
1239 | if ((status1 != 0xa5) || (status2 != 0x5a)) | |
1240 | up->port.type = PORT_8250; | |
1241 | } | |
1242 | ||
1243 | up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size; | |
1244 | ||
1245 | if (up->port.type == PORT_UNKNOWN) | |
1246 | goto out; | |
1247 | up->type_probed = up->port.type; /* XXX */ | |
1248 | ||
1249 | /* | |
1250 | * Reset the UART. | |
1251 | */ | |
1252 | #ifdef CONFIG_SERIAL_8250_RSA | |
1253 | if (up->port.type == PORT_RSA) | |
1254 | serial_outp(up, UART_RSA_FRR, 0); | |
1255 | #endif | |
1256 | serial_outp(up, UART_MCR, save_mcr); | |
1257 | serial_outp(up, UART_FCR, (UART_FCR_ENABLE_FIFO | | |
1258 | UART_FCR_CLEAR_RCVR | | |
1259 | UART_FCR_CLEAR_XMIT)); | |
1260 | serial_outp(up, UART_FCR, 0); | |
1261 | (void)serial_in(up, UART_RX); | |
1262 | serial_outp(up, UART_IER, 0); | |
1263 | ||
1264 | out: | |
1265 | spin_unlock_irqrestore(&up->port.lock, flags); | |
1266 | } | |
1267 | ||
1268 | static struct uart_driver sunsu_reg = { | |
1269 | .owner = THIS_MODULE, | |
1270 | .driver_name = "serial", | |
1271 | .devfs_name = "tts/", | |
1272 | .dev_name = "ttyS", | |
1273 | .major = TTY_MAJOR, | |
1274 | }; | |
1275 | ||
1276 | static int __init sunsu_kbd_ms_init(struct uart_sunsu_port *up, int channel) | |
1277 | { | |
623f41eb | 1278 | int quot, baud; |
1da177e4 LT |
1279 | #ifdef CONFIG_SERIO |
1280 | struct serio *serio; | |
1281 | #endif | |
1282 | ||
1283 | up->port.line = channel; | |
1284 | up->port.type = PORT_UNKNOWN; | |
1285 | up->port.uartclk = (SU_BASE_BAUD * 16); | |
1286 | ||
623f41eb | 1287 | if (up->su_type == SU_PORT_KBD) { |
1da177e4 | 1288 | up->cflag = B1200 | CS8 | CLOCAL | CREAD; |
623f41eb DM |
1289 | baud = 1200; |
1290 | } else { | |
1da177e4 | 1291 | up->cflag = B4800 | CS8 | CLOCAL | CREAD; |
623f41eb DM |
1292 | baud = 4800; |
1293 | } | |
1294 | quot = up->port.uartclk / (16 * baud); | |
1da177e4 LT |
1295 | |
1296 | sunsu_autoconfig(up); | |
1297 | if (up->port.type == PORT_UNKNOWN) | |
1298 | return -1; | |
1299 | ||
1300 | printk(KERN_INFO "su%d at 0x%p (irq = %s) is a %s\n", | |
1301 | channel, | |
1302 | up->port.membase, __irq_itoa(up->port.irq), | |
1303 | sunsu_type(&up->port)); | |
1304 | ||
1305 | #ifdef CONFIG_SERIO | |
1306 | up->serio = serio = kmalloc(sizeof(struct serio), GFP_KERNEL); | |
1307 | if (serio) { | |
1308 | memset(serio, 0, sizeof(*serio)); | |
1309 | ||
1310 | serio->port_data = up; | |
1311 | ||
1312 | serio->id.type = SERIO_RS232; | |
1313 | if (up->su_type == SU_PORT_KBD) { | |
1314 | serio->id.proto = SERIO_SUNKBD; | |
1315 | strlcpy(serio->name, "sukbd", sizeof(serio->name)); | |
1316 | } else { | |
1317 | serio->id.proto = SERIO_SUN; | |
1318 | serio->id.extra = 1; | |
1319 | strlcpy(serio->name, "sums", sizeof(serio->name)); | |
1320 | } | |
1321 | strlcpy(serio->phys, (channel == 0 ? "su/serio0" : "su/serio1"), | |
1322 | sizeof(serio->phys)); | |
1323 | ||
1324 | serio->write = sunsu_serio_write; | |
1325 | serio->open = sunsu_serio_open; | |
1326 | serio->close = sunsu_serio_close; | |
1327 | ||
1328 | serio_register_port(serio); | |
1329 | } else { | |
1330 | printk(KERN_WARNING "su%d: not enough memory for serio port\n", | |
1331 | channel); | |
1332 | } | |
1333 | #endif | |
1334 | ||
623f41eb DM |
1335 | sunsu_change_speed(&up->port, up->cflag, 0, quot); |
1336 | ||
1da177e4 LT |
1337 | sunsu_startup(&up->port); |
1338 | return 0; | |
1339 | } | |
1340 | ||
1341 | /* | |
1342 | * ------------------------------------------------------------ | |
1343 | * Serial console driver | |
1344 | * ------------------------------------------------------------ | |
1345 | */ | |
1346 | ||
1347 | #ifdef CONFIG_SERIAL_SUNSU_CONSOLE | |
1348 | ||
1349 | #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) | |
1350 | ||
1351 | /* | |
1352 | * Wait for transmitter & holding register to empty | |
1353 | */ | |
1354 | static __inline__ void wait_for_xmitr(struct uart_sunsu_port *up) | |
1355 | { | |
1356 | unsigned int status, tmout = 10000; | |
1357 | ||
1358 | /* Wait up to 10ms for the character(s) to be sent. */ | |
1359 | do { | |
1360 | status = serial_in(up, UART_LSR); | |
1361 | ||
1362 | if (status & UART_LSR_BI) | |
1363 | up->lsr_break_flag = UART_LSR_BI; | |
1364 | ||
1365 | if (--tmout == 0) | |
1366 | break; | |
1367 | udelay(1); | |
1368 | } while ((status & BOTH_EMPTY) != BOTH_EMPTY); | |
1369 | ||
1370 | /* Wait up to 1s for flow control if necessary */ | |
ce8337cb | 1371 | if (up->port.flags & UPF_CONS_FLOW) { |
1da177e4 LT |
1372 | tmout = 1000000; |
1373 | while (--tmout && | |
1374 | ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0)) | |
1375 | udelay(1); | |
1376 | } | |
1377 | } | |
1378 | ||
1379 | /* | |
1380 | * Print a string to the serial port trying not to disturb | |
1381 | * any possible real use of the port... | |
1382 | */ | |
1383 | static void sunsu_console_write(struct console *co, const char *s, | |
1384 | unsigned int count) | |
1385 | { | |
1386 | struct uart_sunsu_port *up = &sunsu_ports[co->index]; | |
1387 | unsigned int ier; | |
1388 | int i; | |
1389 | ||
1390 | /* | |
1391 | * First save the UER then disable the interrupts | |
1392 | */ | |
1393 | ier = serial_in(up, UART_IER); | |
1394 | serial_out(up, UART_IER, 0); | |
1395 | ||
1396 | /* | |
1397 | * Now, do each character | |
1398 | */ | |
1399 | for (i = 0; i < count; i++, s++) { | |
1400 | wait_for_xmitr(up); | |
1401 | ||
1402 | /* | |
1403 | * Send the character out. | |
1404 | * If a LF, also do CR... | |
1405 | */ | |
1406 | serial_out(up, UART_TX, *s); | |
1407 | if (*s == 10) { | |
1408 | wait_for_xmitr(up); | |
1409 | serial_out(up, UART_TX, 13); | |
1410 | } | |
1411 | } | |
1412 | ||
1413 | /* | |
1414 | * Finally, wait for transmitter to become empty | |
1415 | * and restore the IER | |
1416 | */ | |
1417 | wait_for_xmitr(up); | |
1418 | serial_out(up, UART_IER, ier); | |
1419 | } | |
1420 | ||
1421 | /* | |
1422 | * Setup initial baud/bits/parity. We do two things here: | |
1423 | * - construct a cflag setting for the first su_open() | |
1424 | * - initialize the serial port | |
1425 | * Return non-zero if we didn't find a serial port. | |
1426 | */ | |
48377246 | 1427 | static int sunsu_console_setup(struct console *co, char *options) |
1da177e4 LT |
1428 | { |
1429 | struct uart_port *port; | |
1430 | int baud = 9600; | |
1431 | int bits = 8; | |
1432 | int parity = 'n'; | |
1433 | int flow = 'n'; | |
1434 | ||
1435 | printk("Console: ttyS%d (SU)\n", | |
1436 | (sunsu_reg.minor - 64) + co->index); | |
1437 | ||
1438 | /* | |
1439 | * Check whether an invalid uart number has been specified, and | |
1440 | * if so, search for the first available port that does have | |
1441 | * console support. | |
1442 | */ | |
1443 | if (co->index >= UART_NR) | |
1444 | co->index = 0; | |
1445 | port = &sunsu_ports[co->index].port; | |
1446 | ||
1447 | /* | |
1448 | * Temporary fix. | |
1449 | */ | |
1450 | spin_lock_init(&port->lock); | |
1451 | ||
1452 | if (options) | |
1453 | uart_parse_options(options, &baud, &parity, &bits, &flow); | |
1454 | ||
1455 | return uart_set_options(port, co, baud, parity, bits, flow); | |
1456 | } | |
1457 | ||
1458 | static struct console sunsu_cons = { | |
1459 | .name = "ttyS", | |
1460 | .write = sunsu_console_write, | |
1461 | .device = uart_console_device, | |
1462 | .setup = sunsu_console_setup, | |
1463 | .flags = CON_PRINTBUFFER, | |
1464 | .index = -1, | |
1465 | .data = &sunsu_reg, | |
1466 | }; | |
1da177e4 LT |
1467 | |
1468 | /* | |
1469 | * Register console. | |
1470 | */ | |
1471 | ||
1ddb7c98 | 1472 | static inline struct console *SUNSU_CONSOLE(void) |
1da177e4 LT |
1473 | { |
1474 | int i; | |
1475 | ||
1476 | if (con_is_present()) | |
1ddb7c98 | 1477 | return NULL; |
1da177e4 LT |
1478 | |
1479 | for (i = 0; i < UART_NR; i++) { | |
1480 | int this_minor = sunsu_reg.minor + i; | |
1481 | ||
1482 | if ((this_minor - 64) == (serial_console - 1)) | |
1483 | break; | |
1484 | } | |
1485 | if (i == UART_NR) | |
1ddb7c98 | 1486 | return NULL; |
1da177e4 | 1487 | if (sunsu_ports[i].port_node == 0) |
1ddb7c98 | 1488 | return NULL; |
1da177e4 LT |
1489 | |
1490 | sunsu_cons.index = i; | |
1ddb7c98 DM |
1491 | |
1492 | return &sunsu_cons; | |
1da177e4 LT |
1493 | } |
1494 | #else | |
1ddb7c98 | 1495 | #define SUNSU_CONSOLE() (NULL) |
1da177e4 LT |
1496 | #define sunsu_serial_console_init() do { } while (0) |
1497 | #endif | |
1498 | ||
1499 | static int __init sunsu_serial_init(void) | |
1500 | { | |
1501 | int instance, ret, i; | |
1502 | ||
1503 | /* How many instances do we need? */ | |
1504 | instance = 0; | |
1505 | for (i = 0; i < UART_NR; i++) { | |
1506 | struct uart_sunsu_port *up = &sunsu_ports[i]; | |
1507 | ||
1508 | if (up->su_type == SU_PORT_MS || | |
1509 | up->su_type == SU_PORT_KBD) | |
1510 | continue; | |
1511 | ||
ce8337cb | 1512 | up->port.flags |= UPF_BOOT_AUTOCONF; |
1da177e4 LT |
1513 | up->port.type = PORT_UNKNOWN; |
1514 | up->port.uartclk = (SU_BASE_BAUD * 16); | |
1515 | ||
1516 | sunsu_autoconfig(up); | |
1517 | if (up->port.type == PORT_UNKNOWN) | |
1518 | continue; | |
1519 | ||
1520 | up->port.line = instance++; | |
1521 | up->port.ops = &sunsu_pops; | |
1522 | } | |
1523 | ||
1524 | sunsu_reg.minor = sunserial_current_minor; | |
1da177e4 LT |
1525 | |
1526 | sunsu_reg.nr = instance; | |
1da177e4 LT |
1527 | |
1528 | ret = uart_register_driver(&sunsu_reg); | |
1529 | if (ret < 0) | |
1530 | return ret; | |
1531 | ||
1ddb7c98 DM |
1532 | sunserial_current_minor += instance; |
1533 | ||
1534 | sunsu_reg.cons = SUNSU_CONSOLE(); | |
1535 | ||
1da177e4 LT |
1536 | for (i = 0; i < UART_NR; i++) { |
1537 | struct uart_sunsu_port *up = &sunsu_ports[i]; | |
1538 | ||
1539 | /* Do not register Keyboard/Mouse lines with UART | |
1540 | * layer. | |
1541 | */ | |
1542 | if (up->su_type == SU_PORT_MS || | |
1543 | up->su_type == SU_PORT_KBD) | |
1544 | continue; | |
1545 | ||
1546 | if (up->port.type == PORT_UNKNOWN) | |
1547 | continue; | |
1548 | ||
1549 | uart_add_one_port(&sunsu_reg, &up->port); | |
1550 | } | |
1551 | ||
1552 | return 0; | |
1553 | } | |
1554 | ||
1555 | static int su_node_ok(int node, char *name, int namelen) | |
1556 | { | |
1557 | if (strncmp(name, "su", namelen) == 0 || | |
1558 | strncmp(name, "su_pnp", namelen) == 0) | |
1559 | return 1; | |
1560 | ||
1561 | if (strncmp(name, "serial", namelen) == 0) { | |
1562 | char compat[32]; | |
1563 | int clen; | |
1564 | ||
1565 | /* Is it _really_ a 'su' device? */ | |
1566 | clen = prom_getproperty(node, "compatible", compat, sizeof(compat)); | |
1567 | if (clen > 0) { | |
1568 | if (strncmp(compat, "sab82532", 8) == 0) { | |
1569 | /* Nope, Siemens serial, not for us. */ | |
1570 | return 0; | |
1571 | } | |
1572 | } | |
1573 | return 1; | |
1574 | } | |
1575 | ||
1576 | return 0; | |
1577 | } | |
1578 | ||
1579 | #define SU_PROPSIZE 128 | |
1580 | ||
1581 | /* | |
1582 | * Scan status structure. | |
1583 | * "prop" is a local variable but it eats stack to keep it in each | |
1584 | * stack frame of a recursive procedure. | |
1585 | */ | |
1586 | struct su_probe_scan { | |
1587 | int msnode, kbnode; /* PROM nodes for mouse and keyboard */ | |
1588 | int msx, kbx; /* minors for mouse and keyboard */ | |
1589 | int devices; /* scan index */ | |
1590 | char prop[SU_PROPSIZE]; | |
1591 | }; | |
1592 | ||
1593 | /* | |
1594 | * We have several platforms which present 'su' in different parts | |
1595 | * of the device tree. 'su' may be found under obio, ebus, isa and pci. | |
1596 | * We walk over the tree and find them wherever PROM hides them. | |
1597 | */ | |
1598 | static void __init su_probe_any(struct su_probe_scan *t, int sunode) | |
1599 | { | |
1600 | struct uart_sunsu_port *up; | |
1601 | int len; | |
1602 | ||
1603 | if (t->devices >= UART_NR) | |
1604 | return; | |
1605 | ||
1606 | for (; sunode != 0; sunode = prom_getsibling(sunode)) { | |
1607 | len = prom_getproperty(sunode, "name", t->prop, SU_PROPSIZE); | |
1608 | if (len <= 1) | |
1609 | continue; /* Broken PROM node */ | |
1610 | ||
1611 | if (su_node_ok(sunode, t->prop, len)) { | |
1612 | up = &sunsu_ports[t->devices]; | |
1613 | if (t->kbnode != 0 && sunode == t->kbnode) { | |
1614 | t->kbx = t->devices; | |
1615 | up->su_type = SU_PORT_KBD; | |
1616 | } else if (t->msnode != 0 && sunode == t->msnode) { | |
1617 | t->msx = t->devices; | |
1618 | up->su_type = SU_PORT_MS; | |
1619 | } else { | |
1620 | #ifdef CONFIG_SPARC64 | |
1621 | /* | |
1622 | * Do not attempt to use the truncated | |
1623 | * keyboard/mouse ports as serial ports | |
1624 | * on Ultras with PC keyboard attached. | |
1625 | */ | |
1626 | if (prom_getbool(sunode, "mouse")) | |
1627 | continue; | |
1628 | if (prom_getbool(sunode, "keyboard")) | |
1629 | continue; | |
1630 | #endif | |
1631 | up->su_type = SU_PORT_PORT; | |
1632 | } | |
1633 | up->port_node = sunode; | |
1634 | ++t->devices; | |
1635 | } else { | |
1636 | su_probe_any(t, prom_getchild(sunode)); | |
1637 | } | |
1638 | } | |
1639 | } | |
1640 | ||
1641 | static int __init sunsu_probe(void) | |
1642 | { | |
1643 | int node; | |
1644 | int len; | |
1645 | struct su_probe_scan scan; | |
1646 | ||
1647 | /* | |
1648 | * First, we scan the tree. | |
1649 | */ | |
1650 | scan.devices = 0; | |
1651 | scan.msx = -1; | |
1652 | scan.kbx = -1; | |
1653 | scan.kbnode = 0; | |
1654 | scan.msnode = 0; | |
1655 | ||
1656 | /* | |
1657 | * Get the nodes for keyboard and mouse from 'aliases'... | |
1658 | */ | |
1659 | node = prom_getchild(prom_root_node); | |
1660 | node = prom_searchsiblings(node, "aliases"); | |
1661 | if (node != 0) { | |
1662 | len = prom_getproperty(node, "keyboard", scan.prop, SU_PROPSIZE); | |
1663 | if (len > 0) { | |
1664 | scan.prop[len] = 0; | |
1665 | scan.kbnode = prom_finddevice(scan.prop); | |
1666 | } | |
1667 | ||
1668 | len = prom_getproperty(node, "mouse", scan.prop, SU_PROPSIZE); | |
1669 | if (len > 0) { | |
1670 | scan.prop[len] = 0; | |
1671 | scan.msnode = prom_finddevice(scan.prop); | |
1672 | } | |
1673 | } | |
1674 | ||
1675 | su_probe_any(&scan, prom_getchild(prom_root_node)); | |
1676 | ||
1677 | /* | |
1678 | * Second, we process the special case of keyboard and mouse. | |
1679 | * | |
1680 | * Currently if we got keyboard and mouse hooked to "su" ports | |
1681 | * we do not use any possible remaining "su" as a serial port. | |
1682 | * Thus, we ignore values of .msx and .kbx, then compact ports. | |
1683 | */ | |
1684 | if (scan.msx != -1 && scan.kbx != -1) { | |
1685 | sunsu_ports[0].su_type = SU_PORT_MS; | |
1686 | sunsu_ports[0].port_node = scan.msnode; | |
1687 | sunsu_kbd_ms_init(&sunsu_ports[0], 0); | |
1688 | ||
1689 | sunsu_ports[1].su_type = SU_PORT_KBD; | |
1690 | sunsu_ports[1].port_node = scan.kbnode; | |
1691 | sunsu_kbd_ms_init(&sunsu_ports[1], 1); | |
1692 | ||
1693 | return 0; | |
1694 | } | |
1695 | ||
1696 | if (scan.msx != -1 || scan.kbx != -1) { | |
1697 | printk("sunsu_probe: cannot match keyboard and mouse, confused\n"); | |
1698 | return -ENODEV; | |
1699 | } | |
1700 | ||
1701 | if (scan.devices == 0) | |
1702 | return -ENODEV; | |
1703 | ||
1704 | /* | |
1705 | * Console must be initiated after the generic initialization. | |
1706 | */ | |
1707 | sunsu_serial_init(); | |
1708 | ||
1709 | return 0; | |
1710 | } | |
1711 | ||
1712 | static void __exit sunsu_exit(void) | |
1713 | { | |
1714 | int i, saw_uart; | |
1715 | ||
1716 | saw_uart = 0; | |
1717 | for (i = 0; i < UART_NR; i++) { | |
1718 | struct uart_sunsu_port *up = &sunsu_ports[i]; | |
1719 | ||
1720 | if (up->su_type == SU_PORT_MS || | |
1721 | up->su_type == SU_PORT_KBD) { | |
1722 | #ifdef CONFIG_SERIO | |
1723 | if (up->serio) { | |
1724 | serio_unregister_port(up->serio); | |
1725 | up->serio = NULL; | |
1726 | } | |
1727 | #endif | |
1728 | } else if (up->port.type != PORT_UNKNOWN) { | |
1729 | uart_remove_one_port(&sunsu_reg, &up->port); | |
1730 | saw_uart++; | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | if (saw_uart) | |
1735 | uart_unregister_driver(&sunsu_reg); | |
1736 | } | |
1737 | ||
1738 | module_init(sunsu_probe); | |
1739 | module_exit(sunsu_exit); |