Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | ** mux.c: | |
3 | ** serial driver for the Mux console found in some PA-RISC servers. | |
4 | ** | |
5 | ** (c) Copyright 2002 Ryan Bradetich | |
6 | ** (c) Copyright 2002 Hewlett-Packard Company | |
7 | ** | |
8 | ** This program is free software; you can redistribute it and/or modify | |
9 | ** it under the terms of the GNU General Public License as published by | |
10 | ** the Free Software Foundation; either version 2 of the License, or | |
11 | ** (at your option) any later version. | |
12 | ** | |
13 | ** This Driver currently only supports the console (port 0) on the MUX. | |
14 | ** Additional work will be needed on this driver to enable the full | |
15 | ** functionality of the MUX. | |
16 | ** | |
17 | */ | |
18 | ||
1da177e4 LT |
19 | #include <linux/module.h> |
20 | #include <linux/tty.h> | |
21 | #include <linux/ioport.h> | |
22 | #include <linux/init.h> | |
23 | #include <linux/serial.h> | |
24 | #include <linux/console.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/delay.h> /* for udelay */ | |
27 | #include <linux/device.h> | |
28 | #include <asm/io.h> | |
ae8c75c1 | 29 | #include <asm/irq.h> |
1da177e4 LT |
30 | #include <asm/parisc-device.h> |
31 | ||
32 | #ifdef CONFIG_MAGIC_SYSRQ | |
33 | #include <linux/sysrq.h> | |
34 | #define SUPPORT_SYSRQ | |
35 | #endif | |
36 | ||
37 | #include <linux/serial_core.h> | |
38 | ||
39 | #define MUX_OFFSET 0x800 | |
40 | #define MUX_LINE_OFFSET 0x80 | |
41 | ||
42 | #define MUX_FIFO_SIZE 255 | |
43 | #define MUX_POLL_DELAY (30 * HZ / 1000) | |
44 | ||
45 | #define IO_DATA_REG_OFFSET 0x3c | |
46 | #define IO_DCOUNT_REG_OFFSET 0x40 | |
47 | ||
48 | #define MUX_EOFIFO(status) ((status & 0xF000) == 0xF000) | |
49 | #define MUX_STATUS(status) ((status & 0xF000) == 0x8000) | |
50 | #define MUX_BREAK(status) ((status & 0xF000) == 0x2000) | |
51 | ||
52 | #define MUX_NR 256 | |
5076c158 | 53 | static unsigned int port_cnt __read_mostly; |
4bd5d827 RB |
54 | struct mux_port { |
55 | struct uart_port port; | |
56 | int enabled; | |
57 | }; | |
58 | static struct mux_port mux_ports[MUX_NR]; | |
1da177e4 LT |
59 | |
60 | static struct uart_driver mux_driver = { | |
61 | .owner = THIS_MODULE, | |
62 | .driver_name = "ttyB", | |
63 | .dev_name = "ttyB", | |
64 | .major = MUX_MAJOR, | |
65 | .minor = 0, | |
66 | .nr = MUX_NR, | |
67 | }; | |
68 | ||
69 | static struct timer_list mux_timer; | |
70 | ||
92495c0e RB |
71 | #define UART_PUT_CHAR(p, c) __raw_writel((c), (p)->membase + IO_DATA_REG_OFFSET) |
72 | #define UART_GET_FIFO_CNT(p) __raw_readl((p)->membase + IO_DCOUNT_REG_OFFSET) | |
61425445 RB |
73 | |
74 | /** | |
75 | * get_mux_port_count - Get the number of available ports on the Mux. | |
76 | * @dev: The parisc device. | |
77 | * | |
78 | * This function is used to determine the number of ports the Mux | |
79 | * supports. The IODC data reports the number of ports the Mux | |
80 | * can support, but there are cases where not all the Mux ports | |
81 | * are connected. This function can override the IODC and | |
82 | * return the true port count. | |
83 | */ | |
84 | static int __init get_mux_port_count(struct parisc_device *dev) | |
85 | { | |
514fb84e | 86 | int status; |
61425445 RB |
87 | u8 iodc_data[32]; |
88 | unsigned long bytecnt; | |
89 | ||
61425445 RB |
90 | /* If this is the built-in Mux for the K-Class (Eole CAP/MUX), |
91 | * we only need to allocate resources for 1 port since the | |
92 | * other 7 ports are not connected. | |
93 | */ | |
514fb84e | 94 | if(dev->id.hversion == 0x15) |
61425445 RB |
95 | return 1; |
96 | ||
514fb84e RB |
97 | status = pdc_iodc_read(&bytecnt, dev->hpa.start, 0, iodc_data, 32); |
98 | BUG_ON(status != PDC_OK); | |
99 | ||
61425445 RB |
100 | /* Return the number of ports specified in the iodc data. */ |
101 | return ((((iodc_data)[4] & 0xf0) >> 4) * 8) + 8; | |
102 | } | |
1da177e4 LT |
103 | |
104 | /** | |
105 | * mux_tx_empty - Check if the transmitter fifo is empty. | |
106 | * @port: Ptr to the uart_port. | |
107 | * | |
108 | * This function test if the transmitter fifo for the port | |
109 | * described by 'port' is empty. If it is empty, this function | |
110 | * should return TIOCSER_TEMT, otherwise return 0. | |
111 | */ | |
112 | static unsigned int mux_tx_empty(struct uart_port *port) | |
113 | { | |
92495c0e | 114 | return UART_GET_FIFO_CNT(port) ? 0 : TIOCSER_TEMT; |
1da177e4 LT |
115 | } |
116 | ||
117 | /** | |
118 | * mux_set_mctrl - Set the current state of the modem control inputs. | |
119 | * @ports: Ptr to the uart_port. | |
120 | * @mctrl: Modem control bits. | |
121 | * | |
122 | * The Serial MUX does not support CTS, DCD or DSR so this function | |
123 | * is ignored. | |
124 | */ | |
125 | static void mux_set_mctrl(struct uart_port *port, unsigned int mctrl) | |
126 | { | |
127 | } | |
128 | ||
129 | /** | |
130 | * mux_get_mctrl - Returns the current state of modem control inputs. | |
131 | * @port: Ptr to the uart_port. | |
132 | * | |
133 | * The Serial MUX does not support CTS, DCD or DSR so these lines are | |
134 | * treated as permanently active. | |
135 | */ | |
136 | static unsigned int mux_get_mctrl(struct uart_port *port) | |
137 | { | |
138 | return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; | |
139 | } | |
140 | ||
141 | /** | |
142 | * mux_stop_tx - Stop transmitting characters. | |
143 | * @port: Ptr to the uart_port. | |
1da177e4 LT |
144 | * |
145 | * The Serial MUX does not support this function. | |
146 | */ | |
b129a8cc | 147 | static void mux_stop_tx(struct uart_port *port) |
1da177e4 LT |
148 | { |
149 | } | |
150 | ||
151 | /** | |
152 | * mux_start_tx - Start transmitting characters. | |
153 | * @port: Ptr to the uart_port. | |
1da177e4 LT |
154 | * |
155 | * The Serial Mux does not support this function. | |
156 | */ | |
b129a8cc | 157 | static void mux_start_tx(struct uart_port *port) |
1da177e4 LT |
158 | { |
159 | } | |
160 | ||
161 | /** | |
162 | * mux_stop_rx - Stop receiving characters. | |
163 | * @port: Ptr to the uart_port. | |
164 | * | |
165 | * The Serial Mux does not support this function. | |
166 | */ | |
167 | static void mux_stop_rx(struct uart_port *port) | |
168 | { | |
169 | } | |
170 | ||
171 | /** | |
172 | * mux_enable_ms - Enable modum status interrupts. | |
173 | * @port: Ptr to the uart_port. | |
174 | * | |
175 | * The Serial Mux does not support this function. | |
176 | */ | |
177 | static void mux_enable_ms(struct uart_port *port) | |
178 | { | |
179 | } | |
180 | ||
181 | /** | |
182 | * mux_break_ctl - Control the transmitssion of a break signal. | |
183 | * @port: Ptr to the uart_port. | |
184 | * @break_state: Raise/Lower the break signal. | |
185 | * | |
186 | * The Serial Mux does not support this function. | |
187 | */ | |
188 | static void mux_break_ctl(struct uart_port *port, int break_state) | |
189 | { | |
190 | } | |
191 | ||
192 | /** | |
193 | * mux_write - Write chars to the mux fifo. | |
194 | * @port: Ptr to the uart_port. | |
195 | * | |
196 | * This function writes all the data from the uart buffer to | |
197 | * the mux fifo. | |
198 | */ | |
199 | static void mux_write(struct uart_port *port) | |
200 | { | |
201 | int count; | |
202 | struct circ_buf *xmit = &port->info->xmit; | |
203 | ||
204 | if(port->x_char) { | |
205 | UART_PUT_CHAR(port, port->x_char); | |
206 | port->icount.tx++; | |
207 | port->x_char = 0; | |
208 | return; | |
209 | } | |
210 | ||
211 | if(uart_circ_empty(xmit) || uart_tx_stopped(port)) { | |
b129a8cc | 212 | mux_stop_tx(port); |
1da177e4 LT |
213 | return; |
214 | } | |
215 | ||
216 | count = (port->fifosize) - UART_GET_FIFO_CNT(port); | |
217 | do { | |
218 | UART_PUT_CHAR(port, xmit->buf[xmit->tail]); | |
219 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); | |
220 | port->icount.tx++; | |
221 | if(uart_circ_empty(xmit)) | |
222 | break; | |
223 | ||
224 | } while(--count > 0); | |
225 | ||
226 | while(UART_GET_FIFO_CNT(port)) | |
227 | udelay(1); | |
228 | ||
229 | if(uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
230 | uart_write_wakeup(port); | |
231 | ||
232 | if (uart_circ_empty(xmit)) | |
b129a8cc | 233 | mux_stop_tx(port); |
1da177e4 LT |
234 | } |
235 | ||
236 | /** | |
237 | * mux_read - Read chars from the mux fifo. | |
238 | * @port: Ptr to the uart_port. | |
239 | * | |
240 | * This reads all available data from the mux's fifo and pushes | |
241 | * the data to the tty layer. | |
242 | */ | |
243 | static void mux_read(struct uart_port *port) | |
244 | { | |
245 | int data; | |
a88487c7 | 246 | struct tty_struct *tty = port->info->port.tty; |
1da177e4 LT |
247 | __u32 start_count = port->icount.rx; |
248 | ||
249 | while(1) { | |
92495c0e | 250 | data = __raw_readl(port->membase + IO_DATA_REG_OFFSET); |
1da177e4 LT |
251 | |
252 | if (MUX_STATUS(data)) | |
253 | continue; | |
254 | ||
255 | if (MUX_EOFIFO(data)) | |
256 | break; | |
257 | ||
1da177e4 LT |
258 | port->icount.rx++; |
259 | ||
260 | if (MUX_BREAK(data)) { | |
261 | port->icount.brk++; | |
262 | if(uart_handle_break(port)) | |
263 | continue; | |
264 | } | |
265 | ||
be577a52 | 266 | if (uart_handle_sysrq_char(port, data & 0xffu)) |
1da177e4 LT |
267 | continue; |
268 | ||
33f0f88f | 269 | tty_insert_flip_char(tty, data & 0xFF, TTY_NORMAL); |
1da177e4 LT |
270 | } |
271 | ||
272 | if (start_count != port->icount.rx) { | |
273 | tty_flip_buffer_push(tty); | |
274 | } | |
275 | } | |
276 | ||
277 | /** | |
278 | * mux_startup - Initialize the port. | |
279 | * @port: Ptr to the uart_port. | |
280 | * | |
281 | * Grab any resources needed for this port and start the | |
282 | * mux timer. | |
283 | */ | |
284 | static int mux_startup(struct uart_port *port) | |
285 | { | |
4bd5d827 | 286 | mux_ports[port->line].enabled = 1; |
1da177e4 LT |
287 | return 0; |
288 | } | |
289 | ||
290 | /** | |
291 | * mux_shutdown - Disable the port. | |
292 | * @port: Ptr to the uart_port. | |
293 | * | |
294 | * Release any resources needed for the port. | |
295 | */ | |
296 | static void mux_shutdown(struct uart_port *port) | |
297 | { | |
4bd5d827 | 298 | mux_ports[port->line].enabled = 0; |
1da177e4 LT |
299 | } |
300 | ||
301 | /** | |
302 | * mux_set_termios - Chane port parameters. | |
303 | * @port: Ptr to the uart_port. | |
304 | * @termios: new termios settings. | |
305 | * @old: old termios settings. | |
306 | * | |
307 | * The Serial Mux does not support this function. | |
308 | */ | |
309 | static void | |
606d099c AC |
310 | mux_set_termios(struct uart_port *port, struct ktermios *termios, |
311 | struct ktermios *old) | |
1da177e4 LT |
312 | { |
313 | } | |
314 | ||
315 | /** | |
316 | * mux_type - Describe the port. | |
317 | * @port: Ptr to the uart_port. | |
318 | * | |
319 | * Return a pointer to a string constant describing the | |
320 | * specified port. | |
321 | */ | |
322 | static const char *mux_type(struct uart_port *port) | |
323 | { | |
324 | return "Mux"; | |
325 | } | |
326 | ||
327 | /** | |
328 | * mux_release_port - Release memory and IO regions. | |
329 | * @port: Ptr to the uart_port. | |
330 | * | |
331 | * Release any memory and IO region resources currently in use by | |
332 | * the port. | |
333 | */ | |
334 | static void mux_release_port(struct uart_port *port) | |
335 | { | |
336 | } | |
337 | ||
338 | /** | |
339 | * mux_request_port - Request memory and IO regions. | |
340 | * @port: Ptr to the uart_port. | |
341 | * | |
342 | * Request any memory and IO region resources required by the port. | |
343 | * If any fail, no resources should be registered when this function | |
344 | * returns, and it should return -EBUSY on failure. | |
345 | */ | |
346 | static int mux_request_port(struct uart_port *port) | |
347 | { | |
348 | return 0; | |
349 | } | |
350 | ||
351 | /** | |
352 | * mux_config_port - Perform port autoconfiguration. | |
353 | * @port: Ptr to the uart_port. | |
354 | * @type: Bitmask of required configurations. | |
355 | * | |
4bd5d827 | 356 | * Perform any autoconfiguration steps for the port. This function is |
1da177e4 LT |
357 | * called if the UPF_BOOT_AUTOCONF flag is specified for the port. |
358 | * [Note: This is required for now because of a bug in the Serial core. | |
359 | * rmk has already submitted a patch to linus, should be available for | |
360 | * 2.5.47.] | |
361 | */ | |
362 | static void mux_config_port(struct uart_port *port, int type) | |
363 | { | |
364 | port->type = PORT_MUX; | |
365 | } | |
366 | ||
367 | /** | |
368 | * mux_verify_port - Verify the port information. | |
369 | * @port: Ptr to the uart_port. | |
370 | * @ser: Ptr to the serial information. | |
371 | * | |
372 | * Verify the new serial port information contained within serinfo is | |
373 | * suitable for this port type. | |
374 | */ | |
375 | static int mux_verify_port(struct uart_port *port, struct serial_struct *ser) | |
376 | { | |
377 | if(port->membase == NULL) | |
378 | return -EINVAL; | |
379 | ||
380 | return 0; | |
381 | } | |
382 | ||
383 | /** | |
384 | * mux_drv_poll - Mux poll function. | |
385 | * @unused: Unused variable | |
386 | * | |
387 | * This function periodically polls the Serial MUX to check for new data. | |
388 | */ | |
389 | static void mux_poll(unsigned long unused) | |
390 | { | |
391 | int i; | |
392 | ||
393 | for(i = 0; i < port_cnt; ++i) { | |
4bd5d827 | 394 | if(!mux_ports[i].enabled) |
1da177e4 LT |
395 | continue; |
396 | ||
4bd5d827 RB |
397 | mux_read(&mux_ports[i].port); |
398 | mux_write(&mux_ports[i].port); | |
1da177e4 LT |
399 | } |
400 | ||
401 | mod_timer(&mux_timer, jiffies + MUX_POLL_DELAY); | |
402 | } | |
403 | ||
404 | ||
405 | #ifdef CONFIG_SERIAL_MUX_CONSOLE | |
406 | static void mux_console_write(struct console *co, const char *s, unsigned count) | |
407 | { | |
3de7b648 RB |
408 | /* Wait until the FIFO drains. */ |
409 | while(UART_GET_FIFO_CNT(&mux_ports[0].port)) | |
410 | udelay(1); | |
411 | ||
412 | while(count--) { | |
413 | if(*s == '\n') { | |
414 | UART_PUT_CHAR(&mux_ports[0].port, '\r'); | |
415 | } | |
416 | UART_PUT_CHAR(&mux_ports[0].port, *s++); | |
417 | } | |
418 | ||
1da177e4 LT |
419 | } |
420 | ||
421 | static int mux_console_setup(struct console *co, char *options) | |
422 | { | |
423 | return 0; | |
424 | } | |
425 | ||
426 | struct tty_driver *mux_console_device(struct console *co, int *index) | |
427 | { | |
428 | *index = co->index; | |
429 | return mux_driver.tty_driver; | |
430 | } | |
431 | ||
432 | static struct console mux_console = { | |
433 | .name = "ttyB", | |
434 | .write = mux_console_write, | |
435 | .device = mux_console_device, | |
436 | .setup = mux_console_setup, | |
437 | .flags = CON_ENABLED | CON_PRINTBUFFER, | |
438 | .index = 0, | |
439 | }; | |
440 | ||
441 | #define MUX_CONSOLE &mux_console | |
442 | #else | |
443 | #define MUX_CONSOLE NULL | |
444 | #endif | |
445 | ||
446 | static struct uart_ops mux_pops = { | |
447 | .tx_empty = mux_tx_empty, | |
448 | .set_mctrl = mux_set_mctrl, | |
449 | .get_mctrl = mux_get_mctrl, | |
450 | .stop_tx = mux_stop_tx, | |
451 | .start_tx = mux_start_tx, | |
452 | .stop_rx = mux_stop_rx, | |
453 | .enable_ms = mux_enable_ms, | |
454 | .break_ctl = mux_break_ctl, | |
455 | .startup = mux_startup, | |
456 | .shutdown = mux_shutdown, | |
457 | .set_termios = mux_set_termios, | |
458 | .type = mux_type, | |
459 | .release_port = mux_release_port, | |
460 | .request_port = mux_request_port, | |
461 | .config_port = mux_config_port, | |
462 | .verify_port = mux_verify_port, | |
463 | }; | |
464 | ||
465 | /** | |
466 | * mux_probe - Determine if the Serial Mux should claim this device. | |
467 | * @dev: The parisc device. | |
468 | * | |
469 | * Deterimine if the Serial Mux should claim this chip (return 0) | |
470 | * or not (return 1). | |
471 | */ | |
472 | static int __init mux_probe(struct parisc_device *dev) | |
473 | { | |
61425445 | 474 | int i, status; |
1da177e4 | 475 | |
61425445 | 476 | int port_count = get_mux_port_count(dev); |
752b9403 | 477 | printk(KERN_INFO "Serial mux driver (%d ports) Revision: 0.6\n", port_count); |
1da177e4 | 478 | |
c380f057 RB |
479 | dev_set_drvdata(&dev->dev, (void *)(long)port_count); |
480 | request_mem_region(dev->hpa.start + MUX_OFFSET, | |
481 | port_count * MUX_LINE_OFFSET, "Mux"); | |
1da177e4 LT |
482 | |
483 | if(!port_cnt) { | |
484 | mux_driver.cons = MUX_CONSOLE; | |
485 | ||
486 | status = uart_register_driver(&mux_driver); | |
487 | if(status) { | |
488 | printk(KERN_ERR "Serial mux: Unable to register driver.\n"); | |
489 | return 1; | |
490 | } | |
1da177e4 LT |
491 | } |
492 | ||
c380f057 RB |
493 | for(i = 0; i < port_count; ++i, ++port_cnt) { |
494 | struct uart_port *port = &mux_ports[port_cnt].port; | |
1da177e4 | 495 | port->iobase = 0; |
ae8c75c1 MW |
496 | port->mapbase = dev->hpa.start + MUX_OFFSET + |
497 | (i * MUX_LINE_OFFSET); | |
5076c158 | 498 | port->membase = ioremap_nocache(port->mapbase, MUX_LINE_OFFSET); |
9b4a1617 | 499 | port->iotype = UPIO_MEM; |
1da177e4 | 500 | port->type = PORT_MUX; |
ae8c75c1 | 501 | port->irq = NO_IRQ; |
1da177e4 LT |
502 | port->uartclk = 0; |
503 | port->fifosize = MUX_FIFO_SIZE; | |
504 | port->ops = &mux_pops; | |
505 | port->flags = UPF_BOOT_AUTOCONF; | |
506 | port->line = port_cnt; | |
a137ce85 RB |
507 | |
508 | /* The port->timeout needs to match what is present in | |
509 | * uart_wait_until_sent in serial_core.c. Otherwise | |
510 | * the time spent in msleep_interruptable will be very | |
511 | * long, causing the appearance of a console hang. | |
512 | */ | |
513 | port->timeout = HZ / 50; | |
ae8c75c1 | 514 | spin_lock_init(&port->lock); |
752b9403 | 515 | |
1da177e4 LT |
516 | status = uart_add_one_port(&mux_driver, port); |
517 | BUG_ON(status); | |
518 | } | |
519 | ||
1da177e4 LT |
520 | return 0; |
521 | } | |
522 | ||
c380f057 RB |
523 | static int __devexit mux_remove(struct parisc_device *dev) |
524 | { | |
752b9403 | 525 | int i, j; |
c380f057 RB |
526 | int port_count = (long)dev_get_drvdata(&dev->dev); |
527 | ||
c380f057 RB |
528 | /* Find Port 0 for this card in the mux_ports list. */ |
529 | for(i = 0; i < port_cnt; ++i) { | |
530 | if(mux_ports[i].port.mapbase == dev->hpa.start + MUX_OFFSET) | |
531 | break; | |
532 | } | |
533 | BUG_ON(i + port_count > port_cnt); | |
534 | ||
535 | /* Release the resources associated with each port on the device. */ | |
752b9403 | 536 | for(j = 0; j < port_count; ++j, ++i) { |
c380f057 RB |
537 | struct uart_port *port = &mux_ports[i].port; |
538 | ||
539 | uart_remove_one_port(&mux_driver, port); | |
540 | if(port->membase) | |
541 | iounmap(port->membase); | |
542 | } | |
543 | ||
544 | release_mem_region(dev->hpa.start + MUX_OFFSET, port_count * MUX_LINE_OFFSET); | |
1da177e4 LT |
545 | return 0; |
546 | } | |
547 | ||
752b9403 RB |
548 | /* Hack. This idea was taken from the 8250_gsc.c on how to properly order |
549 | * the serial port detection in the proper order. The idea is we always | |
550 | * want the builtin mux to be detected before addin mux cards, so we | |
551 | * specifically probe for the builtin mux cards first. | |
552 | * | |
553 | * This table only contains the parisc_device_id of known builtin mux | |
554 | * devices. All other mux cards will be detected by the generic mux_tbl. | |
555 | */ | |
556 | static struct parisc_device_id builtin_mux_tbl[] = { | |
557 | { HPHW_A_DIRECT, HVERSION_REV_ANY_ID, 0x15, 0x0000D }, /* All K-class */ | |
558 | { HPHW_A_DIRECT, HVERSION_REV_ANY_ID, 0x44, 0x0000D }, /* E35, E45, and E55 */ | |
559 | { 0, } | |
560 | }; | |
561 | ||
1da177e4 LT |
562 | static struct parisc_device_id mux_tbl[] = { |
563 | { HPHW_A_DIRECT, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0000D }, | |
564 | { 0, } | |
565 | }; | |
566 | ||
752b9403 | 567 | MODULE_DEVICE_TABLE(parisc, builtin_mux_tbl); |
1da177e4 LT |
568 | MODULE_DEVICE_TABLE(parisc, mux_tbl); |
569 | ||
752b9403 RB |
570 | static struct parisc_driver builtin_serial_mux_driver = { |
571 | .name = "builtin_serial_mux", | |
572 | .id_table = builtin_mux_tbl, | |
573 | .probe = mux_probe, | |
574 | .remove = __devexit_p(mux_remove), | |
575 | }; | |
576 | ||
1da177e4 | 577 | static struct parisc_driver serial_mux_driver = { |
bdad1f83 | 578 | .name = "serial_mux", |
1da177e4 LT |
579 | .id_table = mux_tbl, |
580 | .probe = mux_probe, | |
c380f057 | 581 | .remove = __devexit_p(mux_remove), |
1da177e4 LT |
582 | }; |
583 | ||
584 | /** | |
8f4aafec | 585 | * mux_init - Serial MUX initialization procedure. |
1da177e4 LT |
586 | * |
587 | * Register the Serial MUX driver. | |
588 | */ | |
589 | static int __init mux_init(void) | |
590 | { | |
752b9403 RB |
591 | register_parisc_driver(&builtin_serial_mux_driver); |
592 | register_parisc_driver(&serial_mux_driver); | |
c380f057 RB |
593 | |
594 | if(port_cnt > 0) { | |
595 | /* Start the Mux timer */ | |
596 | init_timer(&mux_timer); | |
597 | mux_timer.function = mux_poll; | |
598 | mod_timer(&mux_timer, jiffies + MUX_POLL_DELAY); | |
599 | ||
600 | #ifdef CONFIG_SERIAL_MUX_CONSOLE | |
601 | register_console(&mux_console); | |
602 | #endif | |
603 | } | |
604 | ||
752b9403 | 605 | return 0; |
1da177e4 LT |
606 | } |
607 | ||
608 | /** | |
609 | * mux_exit - Serial MUX cleanup procedure. | |
610 | * | |
611 | * Unregister the Serial MUX driver from the tty layer. | |
612 | */ | |
613 | static void __exit mux_exit(void) | |
614 | { | |
c380f057 RB |
615 | /* Delete the Mux timer. */ |
616 | if(port_cnt > 0) { | |
617 | del_timer(&mux_timer); | |
618 | #ifdef CONFIG_SERIAL_MUX_CONSOLE | |
619 | unregister_console(&mux_console); | |
620 | #endif | |
1da177e4 LT |
621 | } |
622 | ||
752b9403 | 623 | unregister_parisc_driver(&builtin_serial_mux_driver); |
c380f057 | 624 | unregister_parisc_driver(&serial_mux_driver); |
1da177e4 LT |
625 | uart_unregister_driver(&mux_driver); |
626 | } | |
627 | ||
628 | module_init(mux_init); | |
629 | module_exit(mux_exit); | |
630 | ||
631 | MODULE_AUTHOR("Ryan Bradetich"); | |
632 | MODULE_DESCRIPTION("Serial MUX driver"); | |
633 | MODULE_LICENSE("GPL"); | |
634 | MODULE_ALIAS_CHARDEV_MAJOR(MUX_MAJOR); |