Commit | Line | Data |
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e3b3d0f5 | 1 | // SPDX-License-Identifier: GPL-2.0 |
d87a6d95 | 2 | /* |
1da177e4 LT |
3 | * su.c: Small serial driver for keyboard/mouse interface on sparc32/PCI |
4 | * | |
5 | * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) | |
6 | * Copyright (C) 1998-1999 Pete Zaitcev (zaitcev@yahoo.com) | |
7 | * | |
8 | * This is mainly a variation of 8250.c, credits go to authors mentioned | |
9 | * therein. In fact this driver should be merged into the generic 8250.c | |
10 | * infrastructure perhaps using a 8250_sparc.c module. | |
11 | * | |
12 | * Fixed to use tty_get_baud_rate(). | |
13 | * Theodore Ts'o <tytso@mit.edu>, 2001-Oct-12 | |
14 | * | |
15 | * Converted to new 2.5.x UART layer. | |
9efc3715 | 16 | * David S. Miller (davem@davemloft.net), 2002-Jul-29 |
1da177e4 LT |
17 | */ |
18 | ||
1da177e4 LT |
19 | #include <linux/module.h> |
20 | #include <linux/kernel.h> | |
1da177e4 LT |
21 | #include <linux/spinlock.h> |
22 | #include <linux/errno.h> | |
23 | #include <linux/tty.h> | |
24 | #include <linux/tty_flip.h> | |
25 | #include <linux/major.h> | |
26 | #include <linux/string.h> | |
27 | #include <linux/ptrace.h> | |
28 | #include <linux/ioport.h> | |
29 | #include <linux/circ_buf.h> | |
30 | #include <linux/serial.h> | |
31 | #include <linux/sysrq.h> | |
32 | #include <linux/console.h> | |
5a0e3ad6 | 33 | #include <linux/slab.h> |
1da177e4 LT |
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> | |
c6ed413d | 40 | #include <linux/of_device.h> |
1da177e4 LT |
41 | |
42 | #include <asm/io.h> | |
43 | #include <asm/irq.h> | |
1708d242 | 44 | #include <asm/prom.h> |
d550bbd4 | 45 | #include <asm/setup.h> |
1da177e4 LT |
46 | |
47 | #if defined(CONFIG_SERIAL_SUNSU_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) | |
48 | #define SUPPORT_SYSRQ | |
49 | #endif | |
50 | ||
51 | #include <linux/serial_core.h> | |
6816383a | 52 | #include <linux/sunserialcore.h> |
1da177e4 LT |
53 | |
54 | /* We are on a NS PC87303 clocked with 24.0 MHz, which results | |
55 | * in a UART clock of 1.8462 MHz. | |
56 | */ | |
57 | #define SU_BASE_BAUD (1846200 / 16) | |
58 | ||
59 | enum su_type { SU_PORT_NONE, SU_PORT_MS, SU_PORT_KBD, SU_PORT_PORT }; | |
60 | static char *su_typev[] = { "su(???)", "su(mouse)", "su(kbd)", "su(serial)" }; | |
61 | ||
4b71598b PG |
62 | struct serial_uart_config { |
63 | char *name; | |
64 | int dfl_xmit_fifo_size; | |
65 | int flags; | |
66 | }; | |
67 | ||
1da177e4 LT |
68 | /* |
69 | * Here we define the default xmit fifo size used for each type of UART. | |
70 | */ | |
e2c65425 | 71 | static const struct serial_uart_config uart_config[] = { |
1da177e4 LT |
72 | { "unknown", 1, 0 }, |
73 | { "8250", 1, 0 }, | |
74 | { "16450", 1, 0 }, | |
75 | { "16550", 1, 0 }, | |
76 | { "16550A", 16, UART_CLEAR_FIFO | UART_USE_FIFO }, | |
77 | { "Cirrus", 1, 0 }, | |
78 | { "ST16650", 1, UART_CLEAR_FIFO | UART_STARTECH }, | |
79 | { "ST16650V2", 32, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH }, | |
80 | { "TI16750", 64, UART_CLEAR_FIFO | UART_USE_FIFO }, | |
81 | { "Startech", 1, 0 }, | |
82 | { "16C950/954", 128, UART_CLEAR_FIFO | UART_USE_FIFO }, | |
83 | { "ST16654", 64, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH }, | |
84 | { "XR16850", 128, UART_CLEAR_FIFO | UART_USE_FIFO | UART_STARTECH }, | |
85 | { "RSA", 2048, UART_CLEAR_FIFO | UART_USE_FIFO } | |
86 | }; | |
87 | ||
88 | struct uart_sunsu_port { | |
89 | struct uart_port port; | |
90 | unsigned char acr; | |
91 | unsigned char ier; | |
92 | unsigned short rev; | |
93 | unsigned char lcr; | |
94 | unsigned int lsr_break_flag; | |
95 | unsigned int cflag; | |
96 | ||
97 | /* Probing information. */ | |
98 | enum su_type su_type; | |
99 | unsigned int type_probed; /* XXX Stupid */ | |
1708d242 | 100 | unsigned long reg_size; |
1da177e4 LT |
101 | |
102 | #ifdef CONFIG_SERIO | |
1708d242 | 103 | struct serio serio; |
1da177e4 LT |
104 | int serio_open; |
105 | #endif | |
106 | }; | |
107 | ||
41c28ff1 | 108 | static unsigned int serial_in(struct uart_sunsu_port *up, int offset) |
1da177e4 LT |
109 | { |
110 | offset <<= up->port.regshift; | |
111 | ||
112 | switch (up->port.iotype) { | |
9b4a1617 | 113 | case UPIO_HUB6: |
1da177e4 LT |
114 | outb(up->port.hub6 - 1 + offset, up->port.iobase); |
115 | return inb(up->port.iobase + 1); | |
116 | ||
9b4a1617 | 117 | case UPIO_MEM: |
1da177e4 LT |
118 | return readb(up->port.membase + offset); |
119 | ||
120 | default: | |
121 | return inb(up->port.iobase + offset); | |
122 | } | |
123 | } | |
124 | ||
41c28ff1 | 125 | static void serial_out(struct uart_sunsu_port *up, int offset, int value) |
1da177e4 LT |
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 | 267 | { |
9a6962c5 FF |
268 | struct uart_sunsu_port *up = |
269 | container_of(port, struct uart_sunsu_port, port); | |
1da177e4 | 270 | |
b129a8cc RK |
271 | __stop_tx(up); |
272 | ||
3d9c9948 AV |
273 | /* |
274 | * We really want to stop the transmitter from sending. | |
275 | */ | |
276 | if (up->port.type == PORT_16C950) { | |
1da177e4 LT |
277 | up->acr |= UART_ACR_TXDIS; |
278 | serial_icr_write(up, UART_ACR, up->acr); | |
279 | } | |
280 | } | |
281 | ||
b129a8cc | 282 | static void sunsu_start_tx(struct uart_port *port) |
1da177e4 | 283 | { |
9a6962c5 FF |
284 | struct uart_sunsu_port *up = |
285 | container_of(port, struct uart_sunsu_port, port); | |
1da177e4 LT |
286 | |
287 | if (!(up->ier & UART_IER_THRI)) { | |
288 | up->ier |= UART_IER_THRI; | |
289 | serial_out(up, UART_IER, up->ier); | |
290 | } | |
3d9c9948 | 291 | |
1da177e4 | 292 | /* |
3d9c9948 | 293 | * Re-enable the transmitter if we disabled it. |
1da177e4 | 294 | */ |
3d9c9948 | 295 | if (up->port.type == PORT_16C950 && up->acr & UART_ACR_TXDIS) { |
1da177e4 LT |
296 | up->acr &= ~UART_ACR_TXDIS; |
297 | serial_icr_write(up, UART_ACR, up->acr); | |
298 | } | |
299 | } | |
300 | ||
301 | static void sunsu_stop_rx(struct uart_port *port) | |
302 | { | |
9a6962c5 FF |
303 | struct uart_sunsu_port *up = |
304 | container_of(port, struct uart_sunsu_port, port); | |
1da177e4 | 305 | |
1da177e4 LT |
306 | up->ier &= ~UART_IER_RLSI; |
307 | up->port.read_status_mask &= ~UART_LSR_DR; | |
308 | serial_out(up, UART_IER, up->ier); | |
1da177e4 LT |
309 | } |
310 | ||
311 | static void sunsu_enable_ms(struct uart_port *port) | |
312 | { | |
9a6962c5 FF |
313 | struct uart_sunsu_port *up = |
314 | container_of(port, struct uart_sunsu_port, port); | |
1da177e4 LT |
315 | unsigned long flags; |
316 | ||
317 | spin_lock_irqsave(&up->port.lock, flags); | |
318 | up->ier |= UART_IER_MSI; | |
319 | serial_out(up, UART_IER, up->ier); | |
320 | spin_unlock_irqrestore(&up->port.lock, flags); | |
321 | } | |
322 | ||
2e124b4a | 323 | static void |
7d12e780 | 324 | receive_chars(struct uart_sunsu_port *up, unsigned char *status) |
1da177e4 | 325 | { |
92a19f9c | 326 | struct tty_port *port = &up->port.state->port; |
33f0f88f | 327 | unsigned char ch, flag; |
1da177e4 LT |
328 | int max_count = 256; |
329 | int saw_console_brk = 0; | |
330 | ||
331 | do { | |
1da177e4 | 332 | ch = serial_inp(up, UART_RX); |
33f0f88f | 333 | flag = TTY_NORMAL; |
1da177e4 LT |
334 | up->port.icount.rx++; |
335 | ||
336 | if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE | | |
337 | UART_LSR_FE | UART_LSR_OE))) { | |
338 | /* | |
339 | * For statistics only | |
340 | */ | |
341 | if (*status & UART_LSR_BI) { | |
342 | *status &= ~(UART_LSR_FE | UART_LSR_PE); | |
343 | up->port.icount.brk++; | |
344 | if (up->port.cons != NULL && | |
345 | up->port.line == up->port.cons->index) | |
346 | saw_console_brk = 1; | |
347 | /* | |
348 | * We do the SysRQ and SAK checking | |
349 | * here because otherwise the break | |
350 | * may get masked by ignore_status_mask | |
351 | * or read_status_mask. | |
352 | */ | |
353 | if (uart_handle_break(&up->port)) | |
354 | goto ignore_char; | |
355 | } else if (*status & UART_LSR_PE) | |
356 | up->port.icount.parity++; | |
357 | else if (*status & UART_LSR_FE) | |
358 | up->port.icount.frame++; | |
359 | if (*status & UART_LSR_OE) | |
360 | up->port.icount.overrun++; | |
361 | ||
362 | /* | |
363 | * Mask off conditions which should be ingored. | |
364 | */ | |
365 | *status &= up->port.read_status_mask; | |
366 | ||
367 | if (up->port.cons != NULL && | |
368 | up->port.line == up->port.cons->index) { | |
369 | /* Recover the break flag from console xmit */ | |
370 | *status |= up->lsr_break_flag; | |
371 | up->lsr_break_flag = 0; | |
372 | } | |
373 | ||
374 | if (*status & UART_LSR_BI) { | |
33f0f88f | 375 | flag = TTY_BREAK; |
1da177e4 | 376 | } else if (*status & UART_LSR_PE) |
33f0f88f | 377 | flag = TTY_PARITY; |
1da177e4 | 378 | else if (*status & UART_LSR_FE) |
33f0f88f | 379 | flag = TTY_FRAME; |
1da177e4 | 380 | } |
7d12e780 | 381 | if (uart_handle_sysrq_char(&up->port, ch)) |
1da177e4 | 382 | goto ignore_char; |
33f0f88f | 383 | if ((*status & up->port.ignore_status_mask) == 0) |
92a19f9c | 384 | tty_insert_flip_char(port, ch, flag); |
33f0f88f | 385 | if (*status & UART_LSR_OE) |
1da177e4 LT |
386 | /* |
387 | * Overrun is special, since it's reported | |
388 | * immediately, and doesn't affect the current | |
389 | * character. | |
390 | */ | |
92a19f9c | 391 | tty_insert_flip_char(port, 0, TTY_OVERRUN); |
1da177e4 LT |
392 | ignore_char: |
393 | *status = serial_inp(up, UART_LSR); | |
394 | } while ((*status & UART_LSR_DR) && (max_count-- > 0)); | |
395 | ||
396 | if (saw_console_brk) | |
397 | sun_do_break(); | |
1da177e4 LT |
398 | } |
399 | ||
41c28ff1 | 400 | static void transmit_chars(struct uart_sunsu_port *up) |
1da177e4 | 401 | { |
ebd2c8f6 | 402 | struct circ_buf *xmit = &up->port.state->xmit; |
1da177e4 LT |
403 | int count; |
404 | ||
405 | if (up->port.x_char) { | |
406 | serial_outp(up, UART_TX, up->port.x_char); | |
407 | up->port.icount.tx++; | |
408 | up->port.x_char = 0; | |
409 | return; | |
410 | } | |
b129a8cc RK |
411 | if (uart_tx_stopped(&up->port)) { |
412 | sunsu_stop_tx(&up->port); | |
413 | return; | |
414 | } | |
415 | if (uart_circ_empty(xmit)) { | |
416 | __stop_tx(up); | |
1da177e4 LT |
417 | return; |
418 | } | |
419 | ||
420 | count = up->port.fifosize; | |
421 | do { | |
422 | serial_out(up, UART_TX, xmit->buf[xmit->tail]); | |
423 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); | |
424 | up->port.icount.tx++; | |
425 | if (uart_circ_empty(xmit)) | |
426 | break; | |
427 | } while (--count > 0); | |
428 | ||
429 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
430 | uart_write_wakeup(&up->port); | |
431 | ||
432 | if (uart_circ_empty(xmit)) | |
b129a8cc | 433 | __stop_tx(up); |
1da177e4 LT |
434 | } |
435 | ||
41c28ff1 | 436 | static void check_modem_status(struct uart_sunsu_port *up) |
1da177e4 LT |
437 | { |
438 | int status; | |
439 | ||
440 | status = serial_in(up, UART_MSR); | |
441 | ||
442 | if ((status & UART_MSR_ANY_DELTA) == 0) | |
443 | return; | |
444 | ||
445 | if (status & UART_MSR_TERI) | |
446 | up->port.icount.rng++; | |
447 | if (status & UART_MSR_DDSR) | |
448 | up->port.icount.dsr++; | |
449 | if (status & UART_MSR_DDCD) | |
450 | uart_handle_dcd_change(&up->port, status & UART_MSR_DCD); | |
451 | if (status & UART_MSR_DCTS) | |
452 | uart_handle_cts_change(&up->port, status & UART_MSR_CTS); | |
453 | ||
bdc04e31 | 454 | wake_up_interruptible(&up->port.state->port.delta_msr_wait); |
1da177e4 LT |
455 | } |
456 | ||
7d12e780 | 457 | static irqreturn_t sunsu_serial_interrupt(int irq, void *dev_id) |
1da177e4 LT |
458 | { |
459 | struct uart_sunsu_port *up = dev_id; | |
460 | unsigned long flags; | |
461 | unsigned char status; | |
462 | ||
463 | spin_lock_irqsave(&up->port.lock, flags); | |
464 | ||
465 | do { | |
1da177e4 | 466 | status = serial_inp(up, UART_LSR); |
1da177e4 | 467 | if (status & UART_LSR_DR) |
2e124b4a | 468 | receive_chars(up, &status); |
1da177e4 LT |
469 | check_modem_status(up); |
470 | if (status & UART_LSR_THRE) | |
471 | transmit_chars(up); | |
472 | ||
473 | spin_unlock_irqrestore(&up->port.lock, flags); | |
474 | ||
2e124b4a | 475 | tty_flip_buffer_push(&up->port.state->port); |
1da177e4 LT |
476 | |
477 | spin_lock_irqsave(&up->port.lock, flags); | |
478 | ||
479 | } while (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT)); | |
480 | ||
481 | spin_unlock_irqrestore(&up->port.lock, flags); | |
482 | ||
483 | return IRQ_HANDLED; | |
484 | } | |
485 | ||
486 | /* Separate interrupt handling path for keyboard/mouse ports. */ | |
487 | ||
488 | static void | |
489 | sunsu_change_speed(struct uart_port *port, unsigned int cflag, | |
490 | unsigned int iflag, unsigned int quot); | |
491 | ||
492 | static void sunsu_change_mouse_baud(struct uart_sunsu_port *up) | |
493 | { | |
494 | unsigned int cur_cflag = up->cflag; | |
495 | int quot, new_baud; | |
496 | ||
497 | up->cflag &= ~CBAUD; | |
498 | up->cflag |= suncore_mouse_baud_cflag_next(cur_cflag, &new_baud); | |
499 | ||
500 | quot = up->port.uartclk / (16 * new_baud); | |
501 | ||
1da177e4 | 502 | sunsu_change_speed(&up->port, up->cflag, 0, quot); |
1da177e4 LT |
503 | } |
504 | ||
7d12e780 | 505 | static void receive_kbd_ms_chars(struct uart_sunsu_port *up, int is_break) |
1da177e4 LT |
506 | { |
507 | do { | |
508 | unsigned char ch = serial_inp(up, UART_RX); | |
509 | ||
510 | /* Stop-A is handled by drivers/char/keyboard.c now. */ | |
511 | if (up->su_type == SU_PORT_KBD) { | |
512 | #ifdef CONFIG_SERIO | |
7d12e780 | 513 | serio_interrupt(&up->serio, ch, 0); |
1da177e4 LT |
514 | #endif |
515 | } else if (up->su_type == SU_PORT_MS) { | |
516 | int ret = suncore_mouse_baud_detection(ch, is_break); | |
517 | ||
518 | switch (ret) { | |
519 | case 2: | |
520 | sunsu_change_mouse_baud(up); | |
521 | /* fallthru */ | |
522 | case 1: | |
523 | break; | |
524 | ||
525 | case 0: | |
526 | #ifdef CONFIG_SERIO | |
7d12e780 | 527 | serio_interrupt(&up->serio, ch, 0); |
1da177e4 LT |
528 | #endif |
529 | break; | |
fc811472 | 530 | } |
1da177e4 LT |
531 | } |
532 | } while (serial_in(up, UART_LSR) & UART_LSR_DR); | |
533 | } | |
534 | ||
7d12e780 | 535 | static irqreturn_t sunsu_kbd_ms_interrupt(int irq, void *dev_id) |
1da177e4 LT |
536 | { |
537 | struct uart_sunsu_port *up = dev_id; | |
538 | ||
539 | if (!(serial_in(up, UART_IIR) & UART_IIR_NO_INT)) { | |
540 | unsigned char status = serial_inp(up, UART_LSR); | |
541 | ||
542 | if ((status & UART_LSR_DR) || (status & UART_LSR_BI)) | |
7d12e780 | 543 | receive_kbd_ms_chars(up, (status & UART_LSR_BI) != 0); |
1da177e4 LT |
544 | } |
545 | ||
546 | return IRQ_HANDLED; | |
547 | } | |
548 | ||
549 | static unsigned int sunsu_tx_empty(struct uart_port *port) | |
550 | { | |
9a6962c5 FF |
551 | struct uart_sunsu_port *up = |
552 | container_of(port, struct uart_sunsu_port, port); | |
1da177e4 LT |
553 | unsigned long flags; |
554 | unsigned int ret; | |
555 | ||
556 | spin_lock_irqsave(&up->port.lock, flags); | |
557 | ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0; | |
558 | spin_unlock_irqrestore(&up->port.lock, flags); | |
559 | ||
560 | return ret; | |
561 | } | |
562 | ||
563 | static unsigned int sunsu_get_mctrl(struct uart_port *port) | |
564 | { | |
9a6962c5 FF |
565 | struct uart_sunsu_port *up = |
566 | container_of(port, struct uart_sunsu_port, port); | |
1da177e4 LT |
567 | unsigned char status; |
568 | unsigned int ret; | |
569 | ||
1da177e4 | 570 | status = serial_in(up, UART_MSR); |
1da177e4 LT |
571 | |
572 | ret = 0; | |
573 | if (status & UART_MSR_DCD) | |
574 | ret |= TIOCM_CAR; | |
575 | if (status & UART_MSR_RI) | |
576 | ret |= TIOCM_RNG; | |
577 | if (status & UART_MSR_DSR) | |
578 | ret |= TIOCM_DSR; | |
579 | if (status & UART_MSR_CTS) | |
580 | ret |= TIOCM_CTS; | |
581 | return ret; | |
582 | } | |
583 | ||
584 | static void sunsu_set_mctrl(struct uart_port *port, unsigned int mctrl) | |
585 | { | |
9a6962c5 FF |
586 | struct uart_sunsu_port *up = |
587 | container_of(port, struct uart_sunsu_port, port); | |
1da177e4 LT |
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 | { | |
9a6962c5 FF |
606 | struct uart_sunsu_port *up = |
607 | container_of(port, struct uart_sunsu_port, port); | |
1da177e4 LT |
608 | unsigned long flags; |
609 | ||
610 | spin_lock_irqsave(&up->port.lock, flags); | |
611 | if (break_state == -1) | |
612 | up->lcr |= UART_LCR_SBC; | |
613 | else | |
614 | up->lcr &= ~UART_LCR_SBC; | |
615 | serial_out(up, UART_LCR, up->lcr); | |
616 | spin_unlock_irqrestore(&up->port.lock, flags); | |
617 | } | |
618 | ||
619 | static int sunsu_startup(struct uart_port *port) | |
620 | { | |
9a6962c5 FF |
621 | struct uart_sunsu_port *up = |
622 | container_of(port, struct uart_sunsu_port, port); | |
1da177e4 LT |
623 | unsigned long flags; |
624 | int retval; | |
625 | ||
626 | if (up->port.type == PORT_16C950) { | |
627 | /* Wake up and initialize UART */ | |
628 | up->acr = 0; | |
629 | serial_outp(up, UART_LCR, 0xBF); | |
630 | serial_outp(up, UART_EFR, UART_EFR_ECB); | |
631 | serial_outp(up, UART_IER, 0); | |
632 | serial_outp(up, UART_LCR, 0); | |
633 | serial_icr_write(up, UART_CSR, 0); /* Reset the UART */ | |
634 | serial_outp(up, UART_LCR, 0xBF); | |
635 | serial_outp(up, UART_EFR, UART_EFR_ECB); | |
636 | serial_outp(up, UART_LCR, 0); | |
637 | } | |
638 | ||
639 | #ifdef CONFIG_SERIAL_8250_RSA | |
640 | /* | |
641 | * If this is an RSA port, see if we can kick it up to the | |
642 | * higher speed clock. | |
643 | */ | |
644 | enable_rsa(up); | |
645 | #endif | |
646 | ||
647 | /* | |
648 | * Clear the FIFO buffers and disable them. | |
7f927fcc | 649 | * (they will be reenabled in set_termios()) |
1da177e4 LT |
650 | */ |
651 | if (uart_config[up->port.type].flags & UART_CLEAR_FIFO) { | |
652 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); | |
653 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO | | |
654 | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT); | |
655 | serial_outp(up, UART_FCR, 0); | |
656 | } | |
657 | ||
658 | /* | |
659 | * Clear the interrupt registers. | |
660 | */ | |
661 | (void) serial_inp(up, UART_LSR); | |
662 | (void) serial_inp(up, UART_RX); | |
663 | (void) serial_inp(up, UART_IIR); | |
664 | (void) serial_inp(up, UART_MSR); | |
665 | ||
666 | /* | |
667 | * At this point, there's no way the LSR could still be 0xff; | |
668 | * if it is, then bail out, because there's likely no UART | |
669 | * here. | |
670 | */ | |
ce8337cb | 671 | if (!(up->port.flags & UPF_BUGGY_UART) && |
1da177e4 LT |
672 | (serial_inp(up, UART_LSR) == 0xff)) { |
673 | printk("ttyS%d: LSR safety check engaged!\n", up->port.line); | |
674 | return -ENODEV; | |
675 | } | |
676 | ||
677 | if (up->su_type != SU_PORT_PORT) { | |
678 | retval = request_irq(up->port.irq, sunsu_kbd_ms_interrupt, | |
40663cc7 | 679 | IRQF_SHARED, su_typev[up->su_type], up); |
1da177e4 LT |
680 | } else { |
681 | retval = request_irq(up->port.irq, sunsu_serial_interrupt, | |
40663cc7 | 682 | IRQF_SHARED, su_typev[up->su_type], up); |
1da177e4 LT |
683 | } |
684 | if (retval) { | |
685 | printk("su: Cannot register IRQ %d\n", up->port.irq); | |
686 | return retval; | |
687 | } | |
688 | ||
689 | /* | |
690 | * Now, initialize the UART | |
691 | */ | |
692 | serial_outp(up, UART_LCR, UART_LCR_WLEN8); | |
693 | ||
694 | spin_lock_irqsave(&up->port.lock, flags); | |
695 | ||
696 | up->port.mctrl |= TIOCM_OUT2; | |
697 | ||
698 | sunsu_set_mctrl(&up->port, up->port.mctrl); | |
699 | spin_unlock_irqrestore(&up->port.lock, flags); | |
700 | ||
701 | /* | |
702 | * Finally, enable interrupts. Note: Modem status interrupts | |
703 | * are set via set_termios(), which will be occurring imminently | |
704 | * anyway, so we don't enable them here. | |
705 | */ | |
706 | up->ier = UART_IER_RLSI | UART_IER_RDI; | |
707 | serial_outp(up, UART_IER, up->ier); | |
708 | ||
ce8337cb | 709 | if (up->port.flags & UPF_FOURPORT) { |
1da177e4 LT |
710 | unsigned int icp; |
711 | /* | |
712 | * Enable interrupts on the AST Fourport board | |
713 | */ | |
714 | icp = (up->port.iobase & 0xfe0) | 0x01f; | |
715 | outb_p(0x80, icp); | |
716 | (void) inb_p(icp); | |
717 | } | |
718 | ||
719 | /* | |
720 | * And clear the interrupt registers again for luck. | |
721 | */ | |
722 | (void) serial_inp(up, UART_LSR); | |
723 | (void) serial_inp(up, UART_RX); | |
724 | (void) serial_inp(up, UART_IIR); | |
725 | (void) serial_inp(up, UART_MSR); | |
726 | ||
727 | return 0; | |
728 | } | |
729 | ||
730 | static void sunsu_shutdown(struct uart_port *port) | |
731 | { | |
9a6962c5 FF |
732 | struct uart_sunsu_port *up = |
733 | container_of(port, struct uart_sunsu_port, port); | |
1da177e4 LT |
734 | unsigned long flags; |
735 | ||
736 | /* | |
737 | * Disable interrupts from this port | |
738 | */ | |
739 | up->ier = 0; | |
740 | serial_outp(up, UART_IER, 0); | |
741 | ||
742 | spin_lock_irqsave(&up->port.lock, flags); | |
ce8337cb | 743 | if (up->port.flags & UPF_FOURPORT) { |
1da177e4 LT |
744 | /* reset interrupts on the AST Fourport board */ |
745 | inb((up->port.iobase & 0xfe0) | 0x1f); | |
746 | up->port.mctrl |= TIOCM_OUT1; | |
747 | } else | |
748 | up->port.mctrl &= ~TIOCM_OUT2; | |
749 | ||
750 | sunsu_set_mctrl(&up->port, up->port.mctrl); | |
751 | spin_unlock_irqrestore(&up->port.lock, flags); | |
752 | ||
753 | /* | |
754 | * Disable break condition and FIFOs | |
755 | */ | |
756 | serial_out(up, UART_LCR, serial_inp(up, UART_LCR) & ~UART_LCR_SBC); | |
757 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO | | |
758 | UART_FCR_CLEAR_RCVR | | |
759 | UART_FCR_CLEAR_XMIT); | |
760 | serial_outp(up, UART_FCR, 0); | |
761 | ||
762 | #ifdef CONFIG_SERIAL_8250_RSA | |
763 | /* | |
764 | * Reset the RSA board back to 115kbps compat mode. | |
765 | */ | |
766 | disable_rsa(up); | |
767 | #endif | |
768 | ||
769 | /* | |
770 | * Read data port to reset things. | |
771 | */ | |
772 | (void) serial_in(up, UART_RX); | |
773 | ||
774 | free_irq(up->port.irq, up); | |
775 | } | |
776 | ||
777 | static void | |
778 | sunsu_change_speed(struct uart_port *port, unsigned int cflag, | |
779 | unsigned int iflag, unsigned int quot) | |
780 | { | |
9a6962c5 FF |
781 | struct uart_sunsu_port *up = |
782 | container_of(port, struct uart_sunsu_port, port); | |
1da177e4 LT |
783 | unsigned char cval, fcr = 0; |
784 | unsigned long flags; | |
785 | ||
786 | switch (cflag & CSIZE) { | |
787 | case CS5: | |
788 | cval = 0x00; | |
789 | break; | |
790 | case CS6: | |
791 | cval = 0x01; | |
792 | break; | |
793 | case CS7: | |
794 | cval = 0x02; | |
795 | break; | |
796 | default: | |
797 | case CS8: | |
798 | cval = 0x03; | |
799 | break; | |
800 | } | |
801 | ||
802 | if (cflag & CSTOPB) | |
803 | cval |= 0x04; | |
804 | if (cflag & PARENB) | |
805 | cval |= UART_LCR_PARITY; | |
806 | if (!(cflag & PARODD)) | |
807 | cval |= UART_LCR_EPAR; | |
808 | #ifdef CMSPAR | |
809 | if (cflag & CMSPAR) | |
810 | cval |= UART_LCR_SPAR; | |
811 | #endif | |
812 | ||
813 | /* | |
814 | * Work around a bug in the Oxford Semiconductor 952 rev B | |
815 | * chip which causes it to seriously miscalculate baud rates | |
816 | * when DLL is 0. | |
817 | */ | |
818 | if ((quot & 0xff) == 0 && up->port.type == PORT_16C950 && | |
819 | up->rev == 0x5201) | |
820 | quot ++; | |
821 | ||
822 | if (uart_config[up->port.type].flags & UART_USE_FIFO) { | |
823 | if ((up->port.uartclk / quot) < (2400 * 16)) | |
824 | fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1; | |
825 | #ifdef CONFIG_SERIAL_8250_RSA | |
826 | else if (up->port.type == PORT_RSA) | |
827 | fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_14; | |
828 | #endif | |
829 | else | |
830 | fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8; | |
831 | } | |
832 | if (up->port.type == PORT_16750) | |
833 | fcr |= UART_FCR7_64BYTE; | |
834 | ||
835 | /* | |
836 | * Ok, we're now changing the port state. Do it with | |
837 | * interrupts disabled. | |
838 | */ | |
839 | spin_lock_irqsave(&up->port.lock, flags); | |
840 | ||
841 | /* | |
842 | * Update the per-port timeout. | |
843 | */ | |
844 | uart_update_timeout(port, cflag, (port->uartclk / (16 * quot))); | |
845 | ||
846 | up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; | |
847 | if (iflag & INPCK) | |
848 | up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE; | |
ef8b9ddc | 849 | if (iflag & (IGNBRK | BRKINT | PARMRK)) |
1da177e4 LT |
850 | up->port.read_status_mask |= UART_LSR_BI; |
851 | ||
852 | /* | |
853 | * Characteres to ignore | |
854 | */ | |
855 | up->port.ignore_status_mask = 0; | |
856 | if (iflag & IGNPAR) | |
857 | up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE; | |
858 | if (iflag & IGNBRK) { | |
859 | up->port.ignore_status_mask |= UART_LSR_BI; | |
860 | /* | |
861 | * If we're ignoring parity and break indicators, | |
862 | * ignore overruns too (for real raw support). | |
863 | */ | |
864 | if (iflag & IGNPAR) | |
865 | up->port.ignore_status_mask |= UART_LSR_OE; | |
866 | } | |
867 | ||
868 | /* | |
869 | * ignore all characters if CREAD is not set | |
870 | */ | |
871 | if ((cflag & CREAD) == 0) | |
872 | up->port.ignore_status_mask |= UART_LSR_DR; | |
873 | ||
874 | /* | |
875 | * CTS flow control flag and modem status interrupts | |
876 | */ | |
877 | up->ier &= ~UART_IER_MSI; | |
878 | if (UART_ENABLE_MS(&up->port, cflag)) | |
879 | up->ier |= UART_IER_MSI; | |
880 | ||
881 | serial_out(up, UART_IER, up->ier); | |
882 | ||
883 | if (uart_config[up->port.type].flags & UART_STARTECH) { | |
884 | serial_outp(up, UART_LCR, 0xBF); | |
885 | serial_outp(up, UART_EFR, cflag & CRTSCTS ? UART_EFR_CTS :0); | |
886 | } | |
887 | serial_outp(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */ | |
888 | serial_outp(up, UART_DLL, quot & 0xff); /* LS of divisor */ | |
889 | serial_outp(up, UART_DLM, quot >> 8); /* MS of divisor */ | |
890 | if (up->port.type == PORT_16750) | |
891 | serial_outp(up, UART_FCR, fcr); /* set fcr */ | |
892 | serial_outp(up, UART_LCR, cval); /* reset DLAB */ | |
893 | up->lcr = cval; /* Save LCR */ | |
894 | if (up->port.type != PORT_16750) { | |
895 | if (fcr & UART_FCR_ENABLE_FIFO) { | |
896 | /* emulated UARTs (Lucent Venus 167x) need two steps */ | |
897 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); | |
898 | } | |
899 | serial_outp(up, UART_FCR, fcr); /* set fcr */ | |
900 | } | |
901 | ||
902 | up->cflag = cflag; | |
903 | ||
904 | spin_unlock_irqrestore(&up->port.lock, flags); | |
905 | } | |
906 | ||
907 | static void | |
606d099c AC |
908 | sunsu_set_termios(struct uart_port *port, struct ktermios *termios, |
909 | struct ktermios *old) | |
1da177e4 LT |
910 | { |
911 | unsigned int baud, quot; | |
912 | ||
913 | /* | |
914 | * Ask the core to calculate the divisor for us. | |
915 | */ | |
916 | baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); | |
917 | quot = uart_get_divisor(port, baud); | |
918 | ||
919 | sunsu_change_speed(port, termios->c_cflag, termios->c_iflag, quot); | |
920 | } | |
921 | ||
922 | static void sunsu_release_port(struct uart_port *port) | |
923 | { | |
924 | } | |
925 | ||
926 | static int sunsu_request_port(struct uart_port *port) | |
927 | { | |
928 | return 0; | |
929 | } | |
930 | ||
931 | static void sunsu_config_port(struct uart_port *port, int flags) | |
932 | { | |
9a6962c5 FF |
933 | struct uart_sunsu_port *up = |
934 | container_of(port, struct uart_sunsu_port, port); | |
1da177e4 LT |
935 | |
936 | if (flags & UART_CONFIG_TYPE) { | |
937 | /* | |
938 | * We are supposed to call autoconfig here, but this requires | |
939 | * splitting all the OBP probing crap from the UART probing. | |
940 | * We'll do it when we kill sunsu.c altogether. | |
941 | */ | |
942 | port->type = up->type_probed; /* XXX */ | |
943 | } | |
944 | } | |
945 | ||
946 | static int | |
947 | sunsu_verify_port(struct uart_port *port, struct serial_struct *ser) | |
948 | { | |
949 | return -EINVAL; | |
950 | } | |
951 | ||
952 | static const char * | |
953 | sunsu_type(struct uart_port *port) | |
954 | { | |
955 | int type = port->type; | |
956 | ||
957 | if (type >= ARRAY_SIZE(uart_config)) | |
958 | type = 0; | |
959 | return uart_config[type].name; | |
960 | } | |
961 | ||
0bfdbe07 | 962 | static const struct uart_ops sunsu_pops = { |
1da177e4 LT |
963 | .tx_empty = sunsu_tx_empty, |
964 | .set_mctrl = sunsu_set_mctrl, | |
965 | .get_mctrl = sunsu_get_mctrl, | |
966 | .stop_tx = sunsu_stop_tx, | |
967 | .start_tx = sunsu_start_tx, | |
968 | .stop_rx = sunsu_stop_rx, | |
969 | .enable_ms = sunsu_enable_ms, | |
970 | .break_ctl = sunsu_break_ctl, | |
971 | .startup = sunsu_startup, | |
972 | .shutdown = sunsu_shutdown, | |
973 | .set_termios = sunsu_set_termios, | |
974 | .type = sunsu_type, | |
975 | .release_port = sunsu_release_port, | |
976 | .request_port = sunsu_request_port, | |
977 | .config_port = sunsu_config_port, | |
978 | .verify_port = sunsu_verify_port, | |
979 | }; | |
980 | ||
981 | #define UART_NR 4 | |
982 | ||
983 | static struct uart_sunsu_port sunsu_ports[UART_NR]; | |
cb29529e | 984 | static int nr_inst; /* Number of already registered ports */ |
1da177e4 LT |
985 | |
986 | #ifdef CONFIG_SERIO | |
987 | ||
988 | static DEFINE_SPINLOCK(sunsu_serio_lock); | |
989 | ||
990 | static int sunsu_serio_write(struct serio *serio, unsigned char ch) | |
991 | { | |
992 | struct uart_sunsu_port *up = serio->port_data; | |
993 | unsigned long flags; | |
994 | int lsr; | |
995 | ||
996 | spin_lock_irqsave(&sunsu_serio_lock, flags); | |
997 | ||
998 | do { | |
999 | lsr = serial_in(up, UART_LSR); | |
1000 | } while (!(lsr & UART_LSR_THRE)); | |
1001 | ||
1002 | /* Send the character out. */ | |
1003 | serial_out(up, UART_TX, ch); | |
1004 | ||
1005 | spin_unlock_irqrestore(&sunsu_serio_lock, flags); | |
1006 | ||
1007 | return 0; | |
1008 | } | |
1009 | ||
1010 | static int sunsu_serio_open(struct serio *serio) | |
1011 | { | |
1012 | struct uart_sunsu_port *up = serio->port_data; | |
1013 | unsigned long flags; | |
1014 | int ret; | |
1015 | ||
1016 | spin_lock_irqsave(&sunsu_serio_lock, flags); | |
1017 | if (!up->serio_open) { | |
1018 | up->serio_open = 1; | |
1019 | ret = 0; | |
1020 | } else | |
1021 | ret = -EBUSY; | |
1022 | spin_unlock_irqrestore(&sunsu_serio_lock, flags); | |
1023 | ||
1024 | return ret; | |
1025 | } | |
1026 | ||
1027 | static void sunsu_serio_close(struct serio *serio) | |
1028 | { | |
1029 | struct uart_sunsu_port *up = serio->port_data; | |
1030 | unsigned long flags; | |
1031 | ||
1032 | spin_lock_irqsave(&sunsu_serio_lock, flags); | |
1033 | up->serio_open = 0; | |
1034 | spin_unlock_irqrestore(&sunsu_serio_lock, flags); | |
1035 | } | |
1036 | ||
1037 | #endif /* CONFIG_SERIO */ | |
1038 | ||
1039 | static void sunsu_autoconfig(struct uart_sunsu_port *up) | |
1040 | { | |
1041 | unsigned char status1, status2, scratch, scratch2, scratch3; | |
1042 | unsigned char save_lcr, save_mcr; | |
1da177e4 LT |
1043 | unsigned long flags; |
1044 | ||
1708d242 | 1045 | if (up->su_type == SU_PORT_NONE) |
1da177e4 LT |
1046 | return; |
1047 | ||
1048 | up->type_probed = PORT_UNKNOWN; | |
9b4a1617 | 1049 | up->port.iotype = UPIO_MEM; |
1da177e4 | 1050 | |
1da177e4 LT |
1051 | spin_lock_irqsave(&up->port.lock, flags); |
1052 | ||
ce8337cb | 1053 | if (!(up->port.flags & UPF_BUGGY_UART)) { |
1da177e4 LT |
1054 | /* |
1055 | * Do a simple existence test first; if we fail this, there's | |
1056 | * no point trying anything else. | |
1057 | * | |
1058 | * 0x80 is used as a nonsense port to prevent against false | |
1059 | * positives due to ISA bus float. The assumption is that | |
1060 | * 0x80 is a non-existent port; which should be safe since | |
1061 | * include/asm/io.h also makes this assumption. | |
1062 | */ | |
1063 | scratch = serial_inp(up, UART_IER); | |
1064 | serial_outp(up, UART_IER, 0); | |
1065 | #ifdef __i386__ | |
1066 | outb(0xff, 0x080); | |
1067 | #endif | |
1068 | scratch2 = serial_inp(up, UART_IER); | |
1069 | serial_outp(up, UART_IER, 0x0f); | |
1070 | #ifdef __i386__ | |
1071 | outb(0, 0x080); | |
1072 | #endif | |
1073 | scratch3 = serial_inp(up, UART_IER); | |
1074 | serial_outp(up, UART_IER, scratch); | |
1075 | if (scratch2 != 0 || scratch3 != 0x0F) | |
1076 | goto out; /* We failed; there's nothing here */ | |
1077 | } | |
1078 | ||
1079 | save_mcr = serial_in(up, UART_MCR); | |
1080 | save_lcr = serial_in(up, UART_LCR); | |
1081 | ||
1082 | /* | |
1083 | * Check to see if a UART is really there. Certain broken | |
1084 | * internal modems based on the Rockwell chipset fail this | |
1085 | * test, because they apparently don't implement the loopback | |
1086 | * test mode. So this test is skipped on the COM 1 through | |
1087 | * COM 4 ports. This *should* be safe, since no board | |
1088 | * manufacturer would be stupid enough to design a board | |
1089 | * that conflicts with COM 1-4 --- we hope! | |
1090 | */ | |
ce8337cb | 1091 | if (!(up->port.flags & UPF_SKIP_TEST)) { |
1da177e4 LT |
1092 | serial_outp(up, UART_MCR, UART_MCR_LOOP | 0x0A); |
1093 | status1 = serial_inp(up, UART_MSR) & 0xF0; | |
1094 | serial_outp(up, UART_MCR, save_mcr); | |
1095 | if (status1 != 0x90) | |
1096 | goto out; /* We failed loopback test */ | |
1097 | } | |
1098 | serial_outp(up, UART_LCR, 0xBF); /* set up for StarTech test */ | |
1099 | serial_outp(up, UART_EFR, 0); /* EFR is the same as FCR */ | |
1100 | serial_outp(up, UART_LCR, 0); | |
1101 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); | |
1102 | scratch = serial_in(up, UART_IIR) >> 6; | |
1103 | switch (scratch) { | |
1104 | case 0: | |
1105 | up->port.type = PORT_16450; | |
1106 | break; | |
1107 | case 1: | |
1108 | up->port.type = PORT_UNKNOWN; | |
1109 | break; | |
1110 | case 2: | |
1111 | up->port.type = PORT_16550; | |
1112 | break; | |
1113 | case 3: | |
1114 | up->port.type = PORT_16550A; | |
1115 | break; | |
1116 | } | |
1117 | if (up->port.type == PORT_16550A) { | |
1118 | /* Check for Startech UART's */ | |
1119 | serial_outp(up, UART_LCR, UART_LCR_DLAB); | |
1120 | if (serial_in(up, UART_EFR) == 0) { | |
1121 | up->port.type = PORT_16650; | |
1122 | } else { | |
1123 | serial_outp(up, UART_LCR, 0xBF); | |
1124 | if (serial_in(up, UART_EFR) == 0) | |
1125 | up->port.type = PORT_16650V2; | |
1126 | } | |
1127 | } | |
1128 | if (up->port.type == PORT_16550A) { | |
1129 | /* Check for TI 16750 */ | |
1130 | serial_outp(up, UART_LCR, save_lcr | UART_LCR_DLAB); | |
1131 | serial_outp(up, UART_FCR, | |
1132 | UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); | |
1133 | scratch = serial_in(up, UART_IIR) >> 5; | |
1134 | if (scratch == 7) { | |
1135 | /* | |
1136 | * If this is a 16750, and not a cheap UART | |
1137 | * clone, then it should only go into 64 byte | |
1138 | * mode if the UART_FCR7_64BYTE bit was set | |
1139 | * while UART_LCR_DLAB was latched. | |
1140 | */ | |
1141 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); | |
1142 | serial_outp(up, UART_LCR, 0); | |
1143 | serial_outp(up, UART_FCR, | |
1144 | UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE); | |
1145 | scratch = serial_in(up, UART_IIR) >> 5; | |
1146 | if (scratch == 6) | |
1147 | up->port.type = PORT_16750; | |
1148 | } | |
1149 | serial_outp(up, UART_FCR, UART_FCR_ENABLE_FIFO); | |
1150 | } | |
1151 | serial_outp(up, UART_LCR, save_lcr); | |
1152 | if (up->port.type == PORT_16450) { | |
1153 | scratch = serial_in(up, UART_SCR); | |
1154 | serial_outp(up, UART_SCR, 0xa5); | |
1155 | status1 = serial_in(up, UART_SCR); | |
1156 | serial_outp(up, UART_SCR, 0x5a); | |
1157 | status2 = serial_in(up, UART_SCR); | |
1158 | serial_outp(up, UART_SCR, scratch); | |
1159 | ||
1160 | if ((status1 != 0xa5) || (status2 != 0x5a)) | |
1161 | up->port.type = PORT_8250; | |
1162 | } | |
1163 | ||
1164 | up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size; | |
1165 | ||
1166 | if (up->port.type == PORT_UNKNOWN) | |
1167 | goto out; | |
1168 | up->type_probed = up->port.type; /* XXX */ | |
1169 | ||
1170 | /* | |
1171 | * Reset the UART. | |
1172 | */ | |
1173 | #ifdef CONFIG_SERIAL_8250_RSA | |
1174 | if (up->port.type == PORT_RSA) | |
1175 | serial_outp(up, UART_RSA_FRR, 0); | |
1176 | #endif | |
1177 | serial_outp(up, UART_MCR, save_mcr); | |
1178 | serial_outp(up, UART_FCR, (UART_FCR_ENABLE_FIFO | | |
1179 | UART_FCR_CLEAR_RCVR | | |
1180 | UART_FCR_CLEAR_XMIT)); | |
1181 | serial_outp(up, UART_FCR, 0); | |
1182 | (void)serial_in(up, UART_RX); | |
1183 | serial_outp(up, UART_IER, 0); | |
1184 | ||
1185 | out: | |
1186 | spin_unlock_irqrestore(&up->port.lock, flags); | |
1187 | } | |
1188 | ||
1189 | static struct uart_driver sunsu_reg = { | |
1190 | .owner = THIS_MODULE, | |
32039f49 | 1191 | .driver_name = "sunsu", |
1da177e4 LT |
1192 | .dev_name = "ttyS", |
1193 | .major = TTY_MAJOR, | |
1194 | }; | |
1195 | ||
9671f099 | 1196 | static int sunsu_kbd_ms_init(struct uart_sunsu_port *up) |
1da177e4 | 1197 | { |
623f41eb | 1198 | int quot, baud; |
1da177e4 LT |
1199 | #ifdef CONFIG_SERIO |
1200 | struct serio *serio; | |
1201 | #endif | |
1202 | ||
623f41eb | 1203 | if (up->su_type == SU_PORT_KBD) { |
1da177e4 | 1204 | up->cflag = B1200 | CS8 | CLOCAL | CREAD; |
623f41eb DM |
1205 | baud = 1200; |
1206 | } else { | |
1da177e4 | 1207 | up->cflag = B4800 | CS8 | CLOCAL | CREAD; |
623f41eb DM |
1208 | baud = 4800; |
1209 | } | |
1210 | quot = up->port.uartclk / (16 * baud); | |
1da177e4 LT |
1211 | |
1212 | sunsu_autoconfig(up); | |
1213 | if (up->port.type == PORT_UNKNOWN) | |
1708d242 | 1214 | return -ENODEV; |
1da177e4 | 1215 | |
a73ee843 RH |
1216 | printk("%pOF: %s port at %llx, irq %u\n", |
1217 | up->port.dev->of_node, | |
c964521c | 1218 | (up->su_type == SU_PORT_KBD) ? "Keyboard" : "Mouse", |
4f1296a5 DM |
1219 | (unsigned long long) up->port.mapbase, |
1220 | up->port.irq); | |
c964521c | 1221 | |
1da177e4 | 1222 | #ifdef CONFIG_SERIO |
1708d242 DM |
1223 | serio = &up->serio; |
1224 | serio->port_data = up; | |
1da177e4 | 1225 | |
1708d242 DM |
1226 | serio->id.type = SERIO_RS232; |
1227 | if (up->su_type == SU_PORT_KBD) { | |
1228 | serio->id.proto = SERIO_SUNKBD; | |
1229 | strlcpy(serio->name, "sukbd", sizeof(serio->name)); | |
1da177e4 | 1230 | } else { |
1708d242 DM |
1231 | serio->id.proto = SERIO_SUN; |
1232 | serio->id.extra = 1; | |
1233 | strlcpy(serio->name, "sums", sizeof(serio->name)); | |
1da177e4 | 1234 | } |
1708d242 DM |
1235 | strlcpy(serio->phys, |
1236 | (!(up->port.line & 1) ? "su/serio0" : "su/serio1"), | |
1237 | sizeof(serio->phys)); | |
1238 | ||
1239 | serio->write = sunsu_serio_write; | |
1240 | serio->open = sunsu_serio_open; | |
1241 | serio->close = sunsu_serio_close; | |
1242 | serio->dev.parent = up->port.dev; | |
1243 | ||
1244 | serio_register_port(serio); | |
1da177e4 LT |
1245 | #endif |
1246 | ||
623f41eb DM |
1247 | sunsu_change_speed(&up->port, up->cflag, 0, quot); |
1248 | ||
1da177e4 LT |
1249 | sunsu_startup(&up->port); |
1250 | return 0; | |
1251 | } | |
1252 | ||
1253 | /* | |
1254 | * ------------------------------------------------------------ | |
1255 | * Serial console driver | |
1256 | * ------------------------------------------------------------ | |
1257 | */ | |
1258 | ||
1259 | #ifdef CONFIG_SERIAL_SUNSU_CONSOLE | |
1260 | ||
1261 | #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE) | |
1262 | ||
1263 | /* | |
1264 | * Wait for transmitter & holding register to empty | |
1265 | */ | |
0d5547ca | 1266 | static void wait_for_xmitr(struct uart_sunsu_port *up) |
1da177e4 LT |
1267 | { |
1268 | unsigned int status, tmout = 10000; | |
1269 | ||
1270 | /* Wait up to 10ms for the character(s) to be sent. */ | |
1271 | do { | |
1272 | status = serial_in(up, UART_LSR); | |
1273 | ||
1274 | if (status & UART_LSR_BI) | |
1275 | up->lsr_break_flag = UART_LSR_BI; | |
1276 | ||
1277 | if (--tmout == 0) | |
1278 | break; | |
1279 | udelay(1); | |
1280 | } while ((status & BOTH_EMPTY) != BOTH_EMPTY); | |
1281 | ||
1282 | /* Wait up to 1s for flow control if necessary */ | |
ce8337cb | 1283 | if (up->port.flags & UPF_CONS_FLOW) { |
1da177e4 LT |
1284 | tmout = 1000000; |
1285 | while (--tmout && | |
1286 | ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0)) | |
1287 | udelay(1); | |
1288 | } | |
1289 | } | |
1290 | ||
d358788f RK |
1291 | static void sunsu_console_putchar(struct uart_port *port, int ch) |
1292 | { | |
9a6962c5 FF |
1293 | struct uart_sunsu_port *up = |
1294 | container_of(port, struct uart_sunsu_port, port); | |
d358788f RK |
1295 | |
1296 | wait_for_xmitr(up); | |
1297 | serial_out(up, UART_TX, ch); | |
1298 | } | |
1299 | ||
1da177e4 LT |
1300 | /* |
1301 | * Print a string to the serial port trying not to disturb | |
1302 | * any possible real use of the port... | |
1303 | */ | |
1304 | static void sunsu_console_write(struct console *co, const char *s, | |
1305 | unsigned int count) | |
1306 | { | |
1307 | struct uart_sunsu_port *up = &sunsu_ports[co->index]; | |
f3c681c0 | 1308 | unsigned long flags; |
1da177e4 | 1309 | unsigned int ier; |
f3c681c0 DM |
1310 | int locked = 1; |
1311 | ||
e58e241c DM |
1312 | if (up->port.sysrq || oops_in_progress) |
1313 | locked = spin_trylock_irqsave(&up->port.lock, flags); | |
1314 | else | |
1315 | spin_lock_irqsave(&up->port.lock, flags); | |
1da177e4 LT |
1316 | |
1317 | /* | |
1318 | * First save the UER then disable the interrupts | |
1319 | */ | |
1320 | ier = serial_in(up, UART_IER); | |
1321 | serial_out(up, UART_IER, 0); | |
1322 | ||
d358788f | 1323 | uart_console_write(&up->port, s, count, sunsu_console_putchar); |
1da177e4 LT |
1324 | |
1325 | /* | |
1326 | * Finally, wait for transmitter to become empty | |
1327 | * and restore the IER | |
1328 | */ | |
1329 | wait_for_xmitr(up); | |
1330 | serial_out(up, UART_IER, ier); | |
f3c681c0 DM |
1331 | |
1332 | if (locked) | |
e58e241c | 1333 | spin_unlock_irqrestore(&up->port.lock, flags); |
1da177e4 LT |
1334 | } |
1335 | ||
1336 | /* | |
1337 | * Setup initial baud/bits/parity. We do two things here: | |
1338 | * - construct a cflag setting for the first su_open() | |
1339 | * - initialize the serial port | |
1340 | * Return non-zero if we didn't find a serial port. | |
1341 | */ | |
90a660a4 | 1342 | static int __init sunsu_console_setup(struct console *co, char *options) |
1da177e4 | 1343 | { |
be24656a DM |
1344 | static struct ktermios dummy; |
1345 | struct ktermios termios; | |
1da177e4 | 1346 | struct uart_port *port; |
1da177e4 LT |
1347 | |
1348 | printk("Console: ttyS%d (SU)\n", | |
1349 | (sunsu_reg.minor - 64) + co->index); | |
1350 | ||
cb29529e TK |
1351 | if (co->index > nr_inst) |
1352 | return -ENODEV; | |
1da177e4 LT |
1353 | port = &sunsu_ports[co->index].port; |
1354 | ||
1355 | /* | |
1356 | * Temporary fix. | |
1357 | */ | |
1358 | spin_lock_init(&port->lock); | |
1359 | ||
be24656a | 1360 | /* Get firmware console settings. */ |
2dc11581 | 1361 | sunserial_console_termios(co, port->dev->of_node); |
1da177e4 | 1362 | |
be24656a DM |
1363 | memset(&termios, 0, sizeof(struct ktermios)); |
1364 | termios.c_cflag = co->cflag; | |
1365 | port->mctrl |= TIOCM_DTR; | |
1366 | port->ops->set_termios(port, &termios, &dummy); | |
1367 | ||
1368 | return 0; | |
1da177e4 LT |
1369 | } |
1370 | ||
90a660a4 | 1371 | static struct console sunsu_console = { |
1da177e4 LT |
1372 | .name = "ttyS", |
1373 | .write = sunsu_console_write, | |
1374 | .device = uart_console_device, | |
1375 | .setup = sunsu_console_setup, | |
1376 | .flags = CON_PRINTBUFFER, | |
1377 | .index = -1, | |
1378 | .data = &sunsu_reg, | |
1379 | }; | |
1da177e4 LT |
1380 | |
1381 | /* | |
1382 | * Register console. | |
1383 | */ | |
1384 | ||
c73fcc84 | 1385 | static inline struct console *SUNSU_CONSOLE(void) |
1da177e4 | 1386 | { |
90a660a4 | 1387 | return &sunsu_console; |
1da177e4 LT |
1388 | } |
1389 | #else | |
c73fcc84 | 1390 | #define SUNSU_CONSOLE() (NULL) |
1da177e4 LT |
1391 | #define sunsu_serial_console_init() do { } while (0) |
1392 | #endif | |
1393 | ||
9671f099 | 1394 | static enum su_type su_get_type(struct device_node *dp) |
1da177e4 | 1395 | { |
1708d242 | 1396 | struct device_node *ap = of_find_node_by_path("/aliases"); |
1da177e4 | 1397 | |
1708d242 | 1398 | if (ap) { |
ccf0dec6 SR |
1399 | const char *keyb = of_get_property(ap, "keyboard", NULL); |
1400 | const char *ms = of_get_property(ap, "mouse", NULL); | |
1da177e4 | 1401 | |
1708d242 DM |
1402 | if (keyb) { |
1403 | if (dp == of_find_node_by_path(keyb)) | |
1404 | return SU_PORT_KBD; | |
1405 | } | |
1406 | if (ms) { | |
1407 | if (dp == of_find_node_by_path(ms)) | |
1408 | return SU_PORT_MS; | |
1409 | } | |
1410 | } | |
1da177e4 | 1411 | |
1708d242 DM |
1412 | return SU_PORT_PORT; |
1413 | } | |
1da177e4 | 1414 | |
9671f099 | 1415 | static int su_probe(struct platform_device *op) |
1708d242 | 1416 | { |
61c7a080 | 1417 | struct device_node *dp = op->dev.of_node; |
1708d242 DM |
1418 | struct uart_sunsu_port *up; |
1419 | struct resource *rp; | |
91d1ed1a | 1420 | enum su_type type; |
1917d17b | 1421 | bool ignore_line; |
1708d242 | 1422 | int err; |
1da177e4 | 1423 | |
91d1ed1a DM |
1424 | type = su_get_type(dp); |
1425 | if (type == SU_PORT_PORT) { | |
cb29529e | 1426 | if (nr_inst >= UART_NR) |
91d1ed1a | 1427 | return -EINVAL; |
cb29529e | 1428 | up = &sunsu_ports[nr_inst]; |
91d1ed1a DM |
1429 | } else { |
1430 | up = kzalloc(sizeof(*up), GFP_KERNEL); | |
1431 | if (!up) | |
1432 | return -ENOMEM; | |
1433 | } | |
1da177e4 | 1434 | |
cb29529e | 1435 | up->port.line = nr_inst; |
1da177e4 | 1436 | |
1708d242 | 1437 | spin_lock_init(&up->port.lock); |
1da177e4 | 1438 | |
91d1ed1a | 1439 | up->su_type = type; |
f5deb807 | 1440 | |
1708d242 | 1441 | rp = &op->resource[0]; |
91d1ed1a | 1442 | up->port.mapbase = rp->start; |
28f65c11 | 1443 | up->reg_size = resource_size(rp); |
1708d242 | 1444 | up->port.membase = of_ioremap(rp, 0, up->reg_size, "su"); |
91d1ed1a DM |
1445 | if (!up->port.membase) { |
1446 | if (type != SU_PORT_PORT) | |
1447 | kfree(up); | |
1708d242 | 1448 | return -ENOMEM; |
91d1ed1a | 1449 | } |
1ddb7c98 | 1450 | |
1636f8ac | 1451 | up->port.irq = op->archdata.irqs[0]; |
1da177e4 | 1452 | |
1708d242 | 1453 | up->port.dev = &op->dev; |
1da177e4 | 1454 | |
1708d242 DM |
1455 | up->port.type = PORT_UNKNOWN; |
1456 | up->port.uartclk = (SU_BASE_BAUD * 16); | |
1da177e4 | 1457 | |
1708d242 DM |
1458 | err = 0; |
1459 | if (up->su_type == SU_PORT_KBD || up->su_type == SU_PORT_MS) { | |
1460 | err = sunsu_kbd_ms_init(up); | |
91d1ed1a | 1461 | if (err) { |
c4a3987f JL |
1462 | of_iounmap(&op->resource[0], |
1463 | up->port.membase, up->reg_size); | |
91d1ed1a | 1464 | kfree(up); |
c4a3987f | 1465 | return err; |
91d1ed1a | 1466 | } |
696faedd | 1467 | platform_set_drvdata(op, up); |
a1d22d32 | 1468 | |
cb29529e TK |
1469 | nr_inst++; |
1470 | ||
a1d22d32 | 1471 | return 0; |
1da177e4 LT |
1472 | } |
1473 | ||
1708d242 | 1474 | up->port.flags |= UPF_BOOT_AUTOCONF; |
1da177e4 | 1475 | |
1708d242 | 1476 | sunsu_autoconfig(up); |
1da177e4 | 1477 | |
1708d242 DM |
1478 | err = -ENODEV; |
1479 | if (up->port.type == PORT_UNKNOWN) | |
1480 | goto out_unmap; | |
1da177e4 | 1481 | |
1708d242 | 1482 | up->port.ops = &sunsu_pops; |
1da177e4 | 1483 | |
1917d17b DM |
1484 | ignore_line = false; |
1485 | if (!strcmp(dp->name, "rsc-console") || | |
1486 | !strcmp(dp->name, "lom-console")) | |
1487 | ignore_line = true; | |
1488 | ||
c73fcc84 | 1489 | sunserial_console_match(SUNSU_CONSOLE(), dp, |
4e3533d0 | 1490 | &sunsu_reg, up->port.line, |
1917d17b | 1491 | ignore_line); |
1708d242 DM |
1492 | err = uart_add_one_port(&sunsu_reg, &up->port); |
1493 | if (err) | |
1494 | goto out_unmap; | |
1da177e4 | 1495 | |
696faedd | 1496 | platform_set_drvdata(op, up); |
1da177e4 | 1497 | |
cb29529e | 1498 | nr_inst++; |
1da177e4 | 1499 | |
1708d242 DM |
1500 | return 0; |
1501 | ||
1502 | out_unmap: | |
e3a411a3 | 1503 | of_iounmap(&op->resource[0], up->port.membase, up->reg_size); |
af6f9d68 | 1504 | kfree(up); |
1708d242 | 1505 | return err; |
1da177e4 LT |
1506 | } |
1507 | ||
ae8d8a14 | 1508 | static int su_remove(struct platform_device *op) |
1da177e4 | 1509 | { |
696faedd | 1510 | struct uart_sunsu_port *up = platform_get_drvdata(op); |
9616ff43 | 1511 | bool kbdms = false; |
1da177e4 | 1512 | |
1708d242 | 1513 | if (up->su_type == SU_PORT_MS || |
9616ff43 DM |
1514 | up->su_type == SU_PORT_KBD) |
1515 | kbdms = true; | |
1516 | ||
1517 | if (kbdms) { | |
1708d242 DM |
1518 | #ifdef CONFIG_SERIO |
1519 | serio_unregister_port(&up->serio); | |
1520 | #endif | |
9616ff43 | 1521 | } else if (up->port.type != PORT_UNKNOWN) |
1708d242 | 1522 | uart_remove_one_port(&sunsu_reg, &up->port); |
91d1ed1a | 1523 | |
65da4d81 | 1524 | if (up->port.membase) |
e3a411a3 | 1525 | of_iounmap(&op->resource[0], up->port.membase, up->reg_size); |
65da4d81 | 1526 | |
9616ff43 DM |
1527 | if (kbdms) |
1528 | kfree(up); | |
1529 | ||
1708d242 DM |
1530 | return 0; |
1531 | } | |
1da177e4 | 1532 | |
fd098316 | 1533 | static const struct of_device_id su_match[] = { |
1708d242 DM |
1534 | { |
1535 | .name = "su", | |
1536 | }, | |
1537 | { | |
1538 | .name = "su_pnp", | |
1539 | }, | |
1540 | { | |
1541 | .name = "serial", | |
1542 | .compatible = "su", | |
1543 | }, | |
8301d386 DM |
1544 | { |
1545 | .type = "serial", | |
1546 | .compatible = "su", | |
1547 | }, | |
1708d242 DM |
1548 | {}, |
1549 | }; | |
1550 | MODULE_DEVICE_TABLE(of, su_match); | |
1da177e4 | 1551 | |
793218df | 1552 | static struct platform_driver su_driver = { |
4018294b GL |
1553 | .driver = { |
1554 | .name = "su", | |
4018294b GL |
1555 | .of_match_table = su_match, |
1556 | }, | |
1708d242 | 1557 | .probe = su_probe, |
2d47b716 | 1558 | .remove = su_remove, |
1708d242 | 1559 | }; |
1da177e4 | 1560 | |
1708d242 DM |
1561 | static int __init sunsu_init(void) |
1562 | { | |
1563 | struct device_node *dp; | |
1564 | int err; | |
58d784a5 | 1565 | int num_uart = 0; |
1da177e4 | 1566 | |
1708d242 DM |
1567 | for_each_node_by_name(dp, "su") { |
1568 | if (su_get_type(dp) == SU_PORT_PORT) | |
1569 | num_uart++; | |
1da177e4 | 1570 | } |
1708d242 DM |
1571 | for_each_node_by_name(dp, "su_pnp") { |
1572 | if (su_get_type(dp) == SU_PORT_PORT) | |
1573 | num_uart++; | |
1574 | } | |
1575 | for_each_node_by_name(dp, "serial") { | |
1576 | if (of_device_is_compatible(dp, "su")) { | |
1577 | if (su_get_type(dp) == SU_PORT_PORT) | |
1578 | num_uart++; | |
1579 | } | |
1da177e4 | 1580 | } |
8301d386 DM |
1581 | for_each_node_by_type(dp, "serial") { |
1582 | if (of_device_is_compatible(dp, "su")) { | |
1583 | if (su_get_type(dp) == SU_PORT_PORT) | |
1584 | num_uart++; | |
1585 | } | |
1586 | } | |
1da177e4 | 1587 | |
1708d242 | 1588 | if (num_uart) { |
58d784a5 | 1589 | err = sunserial_register_minors(&sunsu_reg, num_uart); |
1708d242 DM |
1590 | if (err) |
1591 | return err; | |
1708d242 | 1592 | } |
1da177e4 | 1593 | |
793218df | 1594 | err = platform_driver_register(&su_driver); |
1708d242 | 1595 | if (err && num_uart) |
58d784a5 | 1596 | sunserial_unregister_minors(&sunsu_reg, num_uart); |
1da177e4 | 1597 | |
1708d242 | 1598 | return err; |
1da177e4 LT |
1599 | } |
1600 | ||
1601 | static void __exit sunsu_exit(void) | |
1602 | { | |
ad348cc5 | 1603 | platform_driver_unregister(&su_driver); |
58d784a5 MH |
1604 | if (sunsu_reg.nr) |
1605 | sunserial_unregister_minors(&sunsu_reg, sunsu_reg.nr); | |
1da177e4 LT |
1606 | } |
1607 | ||
1708d242 | 1608 | module_init(sunsu_init); |
1da177e4 | 1609 | module_exit(sunsu_exit); |
9efc3715 DM |
1610 | |
1611 | MODULE_AUTHOR("Eddie C. Dost, Peter Zaitcev, and David S. Miller"); | |
1612 | MODULE_DESCRIPTION("Sun SU serial port driver"); | |
1613 | MODULE_VERSION("2.0"); | |
9a2a9bb2 | 1614 | MODULE_LICENSE("GPL"); |