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> | |
1da177e4 LT |
25 | #include <linux/delay.h> /* for udelay */ |
26 | #include <linux/device.h> | |
27 | #include <asm/io.h> | |
ae8c75c1 | 28 | #include <asm/irq.h> |
1da177e4 LT |
29 | #include <asm/parisc-device.h> |
30 | ||
31 | #ifdef CONFIG_MAGIC_SYSRQ | |
32 | #include <linux/sysrq.h> | |
33 | #define SUPPORT_SYSRQ | |
34 | #endif | |
35 | ||
36 | #include <linux/serial_core.h> | |
37 | ||
38 | #define MUX_OFFSET 0x800 | |
39 | #define MUX_LINE_OFFSET 0x80 | |
40 | ||
41 | #define MUX_FIFO_SIZE 255 | |
42 | #define MUX_POLL_DELAY (30 * HZ / 1000) | |
43 | ||
44 | #define IO_DATA_REG_OFFSET 0x3c | |
45 | #define IO_DCOUNT_REG_OFFSET 0x40 | |
46 | ||
47 | #define MUX_EOFIFO(status) ((status & 0xF000) == 0xF000) | |
48 | #define MUX_STATUS(status) ((status & 0xF000) == 0x8000) | |
49 | #define MUX_BREAK(status) ((status & 0xF000) == 0x2000) | |
50 | ||
51 | #define MUX_NR 256 | |
5076c158 | 52 | static unsigned int port_cnt __read_mostly; |
4bd5d827 RB |
53 | struct mux_port { |
54 | struct uart_port port; | |
55 | int enabled; | |
56 | }; | |
57 | static struct mux_port mux_ports[MUX_NR]; | |
1da177e4 LT |
58 | |
59 | static struct uart_driver mux_driver = { | |
60 | .owner = THIS_MODULE, | |
61 | .driver_name = "ttyB", | |
62 | .dev_name = "ttyB", | |
63 | .major = MUX_MAJOR, | |
64 | .minor = 0, | |
65 | .nr = MUX_NR, | |
66 | }; | |
67 | ||
68 | static struct timer_list mux_timer; | |
69 | ||
92495c0e RB |
70 | #define UART_PUT_CHAR(p, c) __raw_writel((c), (p)->membase + IO_DATA_REG_OFFSET) |
71 | #define UART_GET_FIFO_CNT(p) __raw_readl((p)->membase + IO_DCOUNT_REG_OFFSET) | |
61425445 RB |
72 | |
73 | /** | |
74 | * get_mux_port_count - Get the number of available ports on the Mux. | |
75 | * @dev: The parisc device. | |
76 | * | |
77 | * This function is used to determine the number of ports the Mux | |
78 | * supports. The IODC data reports the number of ports the Mux | |
79 | * can support, but there are cases where not all the Mux ports | |
80 | * are connected. This function can override the IODC and | |
81 | * return the true port count. | |
82 | */ | |
83 | static int __init get_mux_port_count(struct parisc_device *dev) | |
84 | { | |
514fb84e | 85 | int status; |
61425445 RB |
86 | u8 iodc_data[32]; |
87 | unsigned long bytecnt; | |
88 | ||
61425445 RB |
89 | /* If this is the built-in Mux for the K-Class (Eole CAP/MUX), |
90 | * we only need to allocate resources for 1 port since the | |
91 | * other 7 ports are not connected. | |
92 | */ | |
514fb84e | 93 | if(dev->id.hversion == 0x15) |
61425445 RB |
94 | return 1; |
95 | ||
514fb84e RB |
96 | status = pdc_iodc_read(&bytecnt, dev->hpa.start, 0, iodc_data, 32); |
97 | BUG_ON(status != PDC_OK); | |
98 | ||
61425445 RB |
99 | /* Return the number of ports specified in the iodc data. */ |
100 | return ((((iodc_data)[4] & 0xf0) >> 4) * 8) + 8; | |
101 | } | |
1da177e4 LT |
102 | |
103 | /** | |
104 | * mux_tx_empty - Check if the transmitter fifo is empty. | |
105 | * @port: Ptr to the uart_port. | |
106 | * | |
107 | * This function test if the transmitter fifo for the port | |
108 | * described by 'port' is empty. If it is empty, this function | |
109 | * should return TIOCSER_TEMT, otherwise return 0. | |
110 | */ | |
111 | static unsigned int mux_tx_empty(struct uart_port *port) | |
112 | { | |
92495c0e | 113 | return UART_GET_FIFO_CNT(port) ? 0 : TIOCSER_TEMT; |
1da177e4 LT |
114 | } |
115 | ||
116 | /** | |
117 | * mux_set_mctrl - Set the current state of the modem control inputs. | |
118 | * @ports: Ptr to the uart_port. | |
119 | * @mctrl: Modem control bits. | |
120 | * | |
121 | * The Serial MUX does not support CTS, DCD or DSR so this function | |
122 | * is ignored. | |
123 | */ | |
124 | static void mux_set_mctrl(struct uart_port *port, unsigned int mctrl) | |
125 | { | |
126 | } | |
127 | ||
128 | /** | |
129 | * mux_get_mctrl - Returns the current state of modem control inputs. | |
130 | * @port: Ptr to the uart_port. | |
131 | * | |
132 | * The Serial MUX does not support CTS, DCD or DSR so these lines are | |
133 | * treated as permanently active. | |
134 | */ | |
135 | static unsigned int mux_get_mctrl(struct uart_port *port) | |
136 | { | |
137 | return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; | |
138 | } | |
139 | ||
140 | /** | |
141 | * mux_stop_tx - Stop transmitting characters. | |
142 | * @port: Ptr to the uart_port. | |
1da177e4 LT |
143 | * |
144 | * The Serial MUX does not support this function. | |
145 | */ | |
b129a8cc | 146 | static void mux_stop_tx(struct uart_port *port) |
1da177e4 LT |
147 | { |
148 | } | |
149 | ||
150 | /** | |
151 | * mux_start_tx - Start transmitting characters. | |
152 | * @port: Ptr to the uart_port. | |
1da177e4 LT |
153 | * |
154 | * The Serial Mux does not support this function. | |
155 | */ | |
b129a8cc | 156 | static void mux_start_tx(struct uart_port *port) |
1da177e4 LT |
157 | { |
158 | } | |
159 | ||
160 | /** | |
161 | * mux_stop_rx - Stop receiving characters. | |
162 | * @port: Ptr to the uart_port. | |
163 | * | |
164 | * The Serial Mux does not support this function. | |
165 | */ | |
166 | static void mux_stop_rx(struct uart_port *port) | |
167 | { | |
168 | } | |
169 | ||
170 | /** | |
171 | * mux_enable_ms - Enable modum status interrupts. | |
172 | * @port: Ptr to the uart_port. | |
173 | * | |
174 | * The Serial Mux does not support this function. | |
175 | */ | |
176 | static void mux_enable_ms(struct uart_port *port) | |
177 | { | |
178 | } | |
179 | ||
180 | /** | |
181 | * mux_break_ctl - Control the transmitssion of a break signal. | |
182 | * @port: Ptr to the uart_port. | |
183 | * @break_state: Raise/Lower the break signal. | |
184 | * | |
185 | * The Serial Mux does not support this function. | |
186 | */ | |
187 | static void mux_break_ctl(struct uart_port *port, int break_state) | |
188 | { | |
189 | } | |
190 | ||
191 | /** | |
192 | * mux_write - Write chars to the mux fifo. | |
193 | * @port: Ptr to the uart_port. | |
194 | * | |
195 | * This function writes all the data from the uart buffer to | |
196 | * the mux fifo. | |
197 | */ | |
198 | static void mux_write(struct uart_port *port) | |
199 | { | |
200 | int count; | |
ebd2c8f6 | 201 | struct circ_buf *xmit = &port->state->xmit; |
1da177e4 LT |
202 | |
203 | if(port->x_char) { | |
204 | UART_PUT_CHAR(port, port->x_char); | |
205 | port->icount.tx++; | |
206 | port->x_char = 0; | |
207 | return; | |
208 | } | |
209 | ||
210 | if(uart_circ_empty(xmit) || uart_tx_stopped(port)) { | |
b129a8cc | 211 | mux_stop_tx(port); |
1da177e4 LT |
212 | return; |
213 | } | |
214 | ||
215 | count = (port->fifosize) - UART_GET_FIFO_CNT(port); | |
216 | do { | |
217 | UART_PUT_CHAR(port, xmit->buf[xmit->tail]); | |
218 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); | |
219 | port->icount.tx++; | |
220 | if(uart_circ_empty(xmit)) | |
221 | break; | |
222 | ||
223 | } while(--count > 0); | |
224 | ||
225 | while(UART_GET_FIFO_CNT(port)) | |
226 | udelay(1); | |
227 | ||
228 | if(uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
229 | uart_write_wakeup(port); | |
230 | ||
231 | if (uart_circ_empty(xmit)) | |
b129a8cc | 232 | mux_stop_tx(port); |
1da177e4 LT |
233 | } |
234 | ||
235 | /** | |
236 | * mux_read - Read chars from the mux fifo. | |
237 | * @port: Ptr to the uart_port. | |
238 | * | |
239 | * This reads all available data from the mux's fifo and pushes | |
240 | * the data to the tty layer. | |
241 | */ | |
242 | static void mux_read(struct uart_port *port) | |
243 | { | |
244 | int data; | |
ebd2c8f6 | 245 | struct tty_struct *tty = port->state->port.tty; |
1da177e4 LT |
246 | __u32 start_count = port->icount.rx; |
247 | ||
248 | while(1) { | |
92495c0e | 249 | data = __raw_readl(port->membase + IO_DATA_REG_OFFSET); |
1da177e4 LT |
250 | |
251 | if (MUX_STATUS(data)) | |
252 | continue; | |
253 | ||
254 | if (MUX_EOFIFO(data)) | |
255 | break; | |
256 | ||
1da177e4 LT |
257 | port->icount.rx++; |
258 | ||
259 | if (MUX_BREAK(data)) { | |
260 | port->icount.brk++; | |
261 | if(uart_handle_break(port)) | |
262 | continue; | |
263 | } | |
264 | ||
be577a52 | 265 | if (uart_handle_sysrq_char(port, data & 0xffu)) |
1da177e4 LT |
266 | continue; |
267 | ||
33f0f88f | 268 | tty_insert_flip_char(tty, data & 0xFF, TTY_NORMAL); |
1da177e4 LT |
269 | } |
270 | ||
271 | if (start_count != port->icount.rx) { | |
272 | tty_flip_buffer_push(tty); | |
273 | } | |
274 | } | |
275 | ||
276 | /** | |
277 | * mux_startup - Initialize the port. | |
278 | * @port: Ptr to the uart_port. | |
279 | * | |
280 | * Grab any resources needed for this port and start the | |
281 | * mux timer. | |
282 | */ | |
283 | static int mux_startup(struct uart_port *port) | |
284 | { | |
4bd5d827 | 285 | mux_ports[port->line].enabled = 1; |
1da177e4 LT |
286 | return 0; |
287 | } | |
288 | ||
289 | /** | |
290 | * mux_shutdown - Disable the port. | |
291 | * @port: Ptr to the uart_port. | |
292 | * | |
293 | * Release any resources needed for the port. | |
294 | */ | |
295 | static void mux_shutdown(struct uart_port *port) | |
296 | { | |
4bd5d827 | 297 | mux_ports[port->line].enabled = 0; |
1da177e4 LT |
298 | } |
299 | ||
300 | /** | |
301 | * mux_set_termios - Chane port parameters. | |
302 | * @port: Ptr to the uart_port. | |
303 | * @termios: new termios settings. | |
304 | * @old: old termios settings. | |
305 | * | |
306 | * The Serial Mux does not support this function. | |
307 | */ | |
308 | static void | |
606d099c AC |
309 | mux_set_termios(struct uart_port *port, struct ktermios *termios, |
310 | struct ktermios *old) | |
1da177e4 LT |
311 | { |
312 | } | |
313 | ||
314 | /** | |
315 | * mux_type - Describe the port. | |
316 | * @port: Ptr to the uart_port. | |
317 | * | |
318 | * Return a pointer to a string constant describing the | |
319 | * specified port. | |
320 | */ | |
321 | static const char *mux_type(struct uart_port *port) | |
322 | { | |
323 | return "Mux"; | |
324 | } | |
325 | ||
326 | /** | |
327 | * mux_release_port - Release memory and IO regions. | |
328 | * @port: Ptr to the uart_port. | |
329 | * | |
330 | * Release any memory and IO region resources currently in use by | |
331 | * the port. | |
332 | */ | |
333 | static void mux_release_port(struct uart_port *port) | |
334 | { | |
335 | } | |
336 | ||
337 | /** | |
338 | * mux_request_port - Request memory and IO regions. | |
339 | * @port: Ptr to the uart_port. | |
340 | * | |
341 | * Request any memory and IO region resources required by the port. | |
342 | * If any fail, no resources should be registered when this function | |
343 | * returns, and it should return -EBUSY on failure. | |
344 | */ | |
345 | static int mux_request_port(struct uart_port *port) | |
346 | { | |
347 | return 0; | |
348 | } | |
349 | ||
350 | /** | |
351 | * mux_config_port - Perform port autoconfiguration. | |
352 | * @port: Ptr to the uart_port. | |
353 | * @type: Bitmask of required configurations. | |
354 | * | |
4bd5d827 | 355 | * Perform any autoconfiguration steps for the port. This function is |
1da177e4 LT |
356 | * called if the UPF_BOOT_AUTOCONF flag is specified for the port. |
357 | * [Note: This is required for now because of a bug in the Serial core. | |
358 | * rmk has already submitted a patch to linus, should be available for | |
359 | * 2.5.47.] | |
360 | */ | |
361 | static void mux_config_port(struct uart_port *port, int type) | |
362 | { | |
363 | port->type = PORT_MUX; | |
364 | } | |
365 | ||
366 | /** | |
367 | * mux_verify_port - Verify the port information. | |
368 | * @port: Ptr to the uart_port. | |
369 | * @ser: Ptr to the serial information. | |
370 | * | |
371 | * Verify the new serial port information contained within serinfo is | |
372 | * suitable for this port type. | |
373 | */ | |
374 | static int mux_verify_port(struct uart_port *port, struct serial_struct *ser) | |
375 | { | |
376 | if(port->membase == NULL) | |
377 | return -EINVAL; | |
378 | ||
379 | return 0; | |
380 | } | |
381 | ||
382 | /** | |
383 | * mux_drv_poll - Mux poll function. | |
384 | * @unused: Unused variable | |
385 | * | |
386 | * This function periodically polls the Serial MUX to check for new data. | |
387 | */ | |
388 | static void mux_poll(unsigned long unused) | |
389 | { | |
390 | int i; | |
391 | ||
392 | for(i = 0; i < port_cnt; ++i) { | |
4bd5d827 | 393 | if(!mux_ports[i].enabled) |
1da177e4 LT |
394 | continue; |
395 | ||
4bd5d827 RB |
396 | mux_read(&mux_ports[i].port); |
397 | mux_write(&mux_ports[i].port); | |
1da177e4 LT |
398 | } |
399 | ||
400 | mod_timer(&mux_timer, jiffies + MUX_POLL_DELAY); | |
401 | } | |
402 | ||
403 | ||
404 | #ifdef CONFIG_SERIAL_MUX_CONSOLE | |
405 | static void mux_console_write(struct console *co, const char *s, unsigned count) | |
406 | { | |
3de7b648 RB |
407 | /* Wait until the FIFO drains. */ |
408 | while(UART_GET_FIFO_CNT(&mux_ports[0].port)) | |
409 | udelay(1); | |
410 | ||
411 | while(count--) { | |
412 | if(*s == '\n') { | |
413 | UART_PUT_CHAR(&mux_ports[0].port, '\r'); | |
414 | } | |
415 | UART_PUT_CHAR(&mux_ports[0].port, *s++); | |
416 | } | |
417 | ||
1da177e4 LT |
418 | } |
419 | ||
420 | static int mux_console_setup(struct console *co, char *options) | |
421 | { | |
422 | return 0; | |
423 | } | |
424 | ||
425 | struct tty_driver *mux_console_device(struct console *co, int *index) | |
426 | { | |
427 | *index = co->index; | |
428 | return mux_driver.tty_driver; | |
429 | } | |
430 | ||
431 | static struct console mux_console = { | |
432 | .name = "ttyB", | |
433 | .write = mux_console_write, | |
434 | .device = mux_console_device, | |
435 | .setup = mux_console_setup, | |
436 | .flags = CON_ENABLED | CON_PRINTBUFFER, | |
437 | .index = 0, | |
438 | }; | |
439 | ||
440 | #define MUX_CONSOLE &mux_console | |
441 | #else | |
442 | #define MUX_CONSOLE NULL | |
443 | #endif | |
444 | ||
445 | static struct uart_ops mux_pops = { | |
446 | .tx_empty = mux_tx_empty, | |
447 | .set_mctrl = mux_set_mctrl, | |
448 | .get_mctrl = mux_get_mctrl, | |
449 | .stop_tx = mux_stop_tx, | |
450 | .start_tx = mux_start_tx, | |
451 | .stop_rx = mux_stop_rx, | |
452 | .enable_ms = mux_enable_ms, | |
453 | .break_ctl = mux_break_ctl, | |
454 | .startup = mux_startup, | |
455 | .shutdown = mux_shutdown, | |
456 | .set_termios = mux_set_termios, | |
457 | .type = mux_type, | |
458 | .release_port = mux_release_port, | |
459 | .request_port = mux_request_port, | |
460 | .config_port = mux_config_port, | |
461 | .verify_port = mux_verify_port, | |
462 | }; | |
463 | ||
464 | /** | |
465 | * mux_probe - Determine if the Serial Mux should claim this device. | |
466 | * @dev: The parisc device. | |
467 | * | |
468 | * Deterimine if the Serial Mux should claim this chip (return 0) | |
469 | * or not (return 1). | |
470 | */ | |
471 | static int __init mux_probe(struct parisc_device *dev) | |
472 | { | |
61425445 | 473 | int i, status; |
1da177e4 | 474 | |
61425445 | 475 | int port_count = get_mux_port_count(dev); |
752b9403 | 476 | printk(KERN_INFO "Serial mux driver (%d ports) Revision: 0.6\n", port_count); |
1da177e4 | 477 | |
c380f057 RB |
478 | dev_set_drvdata(&dev->dev, (void *)(long)port_count); |
479 | request_mem_region(dev->hpa.start + MUX_OFFSET, | |
480 | port_count * MUX_LINE_OFFSET, "Mux"); | |
1da177e4 LT |
481 | |
482 | if(!port_cnt) { | |
483 | mux_driver.cons = MUX_CONSOLE; | |
484 | ||
485 | status = uart_register_driver(&mux_driver); | |
486 | if(status) { | |
487 | printk(KERN_ERR "Serial mux: Unable to register driver.\n"); | |
488 | return 1; | |
489 | } | |
1da177e4 LT |
490 | } |
491 | ||
c380f057 RB |
492 | for(i = 0; i < port_count; ++i, ++port_cnt) { |
493 | struct uart_port *port = &mux_ports[port_cnt].port; | |
1da177e4 | 494 | port->iobase = 0; |
ae8c75c1 MW |
495 | port->mapbase = dev->hpa.start + MUX_OFFSET + |
496 | (i * MUX_LINE_OFFSET); | |
5076c158 | 497 | port->membase = ioremap_nocache(port->mapbase, MUX_LINE_OFFSET); |
9b4a1617 | 498 | port->iotype = UPIO_MEM; |
1da177e4 | 499 | port->type = PORT_MUX; |
ae8c75c1 | 500 | port->irq = NO_IRQ; |
1da177e4 LT |
501 | port->uartclk = 0; |
502 | port->fifosize = MUX_FIFO_SIZE; | |
503 | port->ops = &mux_pops; | |
504 | port->flags = UPF_BOOT_AUTOCONF; | |
505 | port->line = port_cnt; | |
a137ce85 RB |
506 | |
507 | /* The port->timeout needs to match what is present in | |
508 | * uart_wait_until_sent in serial_core.c. Otherwise | |
509 | * the time spent in msleep_interruptable will be very | |
510 | * long, causing the appearance of a console hang. | |
511 | */ | |
512 | port->timeout = HZ / 50; | |
ae8c75c1 | 513 | spin_lock_init(&port->lock); |
752b9403 | 514 | |
1da177e4 LT |
515 | status = uart_add_one_port(&mux_driver, port); |
516 | BUG_ON(status); | |
517 | } | |
518 | ||
1da177e4 LT |
519 | return 0; |
520 | } | |
521 | ||
c380f057 RB |
522 | static int __devexit mux_remove(struct parisc_device *dev) |
523 | { | |
752b9403 | 524 | int i, j; |
c380f057 RB |
525 | int port_count = (long)dev_get_drvdata(&dev->dev); |
526 | ||
c380f057 RB |
527 | /* Find Port 0 for this card in the mux_ports list. */ |
528 | for(i = 0; i < port_cnt; ++i) { | |
529 | if(mux_ports[i].port.mapbase == dev->hpa.start + MUX_OFFSET) | |
530 | break; | |
531 | } | |
532 | BUG_ON(i + port_count > port_cnt); | |
533 | ||
534 | /* Release the resources associated with each port on the device. */ | |
752b9403 | 535 | for(j = 0; j < port_count; ++j, ++i) { |
c380f057 RB |
536 | struct uart_port *port = &mux_ports[i].port; |
537 | ||
538 | uart_remove_one_port(&mux_driver, port); | |
539 | if(port->membase) | |
540 | iounmap(port->membase); | |
541 | } | |
542 | ||
543 | release_mem_region(dev->hpa.start + MUX_OFFSET, port_count * MUX_LINE_OFFSET); | |
1da177e4 LT |
544 | return 0; |
545 | } | |
546 | ||
752b9403 RB |
547 | /* Hack. This idea was taken from the 8250_gsc.c on how to properly order |
548 | * the serial port detection in the proper order. The idea is we always | |
549 | * want the builtin mux to be detected before addin mux cards, so we | |
550 | * specifically probe for the builtin mux cards first. | |
551 | * | |
552 | * This table only contains the parisc_device_id of known builtin mux | |
553 | * devices. All other mux cards will be detected by the generic mux_tbl. | |
554 | */ | |
555 | static struct parisc_device_id builtin_mux_tbl[] = { | |
556 | { HPHW_A_DIRECT, HVERSION_REV_ANY_ID, 0x15, 0x0000D }, /* All K-class */ | |
557 | { HPHW_A_DIRECT, HVERSION_REV_ANY_ID, 0x44, 0x0000D }, /* E35, E45, and E55 */ | |
558 | { 0, } | |
559 | }; | |
560 | ||
1da177e4 LT |
561 | static struct parisc_device_id mux_tbl[] = { |
562 | { HPHW_A_DIRECT, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0000D }, | |
563 | { 0, } | |
564 | }; | |
565 | ||
752b9403 | 566 | MODULE_DEVICE_TABLE(parisc, builtin_mux_tbl); |
1da177e4 LT |
567 | MODULE_DEVICE_TABLE(parisc, mux_tbl); |
568 | ||
752b9403 RB |
569 | static struct parisc_driver builtin_serial_mux_driver = { |
570 | .name = "builtin_serial_mux", | |
571 | .id_table = builtin_mux_tbl, | |
572 | .probe = mux_probe, | |
573 | .remove = __devexit_p(mux_remove), | |
574 | }; | |
575 | ||
1da177e4 | 576 | static struct parisc_driver serial_mux_driver = { |
bdad1f83 | 577 | .name = "serial_mux", |
1da177e4 LT |
578 | .id_table = mux_tbl, |
579 | .probe = mux_probe, | |
c380f057 | 580 | .remove = __devexit_p(mux_remove), |
1da177e4 LT |
581 | }; |
582 | ||
583 | /** | |
8f4aafec | 584 | * mux_init - Serial MUX initialization procedure. |
1da177e4 LT |
585 | * |
586 | * Register the Serial MUX driver. | |
587 | */ | |
588 | static int __init mux_init(void) | |
589 | { | |
752b9403 RB |
590 | register_parisc_driver(&builtin_serial_mux_driver); |
591 | register_parisc_driver(&serial_mux_driver); | |
c380f057 RB |
592 | |
593 | if(port_cnt > 0) { | |
594 | /* Start the Mux timer */ | |
595 | init_timer(&mux_timer); | |
596 | mux_timer.function = mux_poll; | |
597 | mod_timer(&mux_timer, jiffies + MUX_POLL_DELAY); | |
598 | ||
599 | #ifdef CONFIG_SERIAL_MUX_CONSOLE | |
600 | register_console(&mux_console); | |
601 | #endif | |
602 | } | |
603 | ||
752b9403 | 604 | return 0; |
1da177e4 LT |
605 | } |
606 | ||
607 | /** | |
608 | * mux_exit - Serial MUX cleanup procedure. | |
609 | * | |
610 | * Unregister the Serial MUX driver from the tty layer. | |
611 | */ | |
612 | static void __exit mux_exit(void) | |
613 | { | |
c380f057 RB |
614 | /* Delete the Mux timer. */ |
615 | if(port_cnt > 0) { | |
616 | del_timer(&mux_timer); | |
617 | #ifdef CONFIG_SERIAL_MUX_CONSOLE | |
618 | unregister_console(&mux_console); | |
619 | #endif | |
1da177e4 LT |
620 | } |
621 | ||
752b9403 | 622 | unregister_parisc_driver(&builtin_serial_mux_driver); |
c380f057 | 623 | unregister_parisc_driver(&serial_mux_driver); |
1da177e4 LT |
624 | uart_unregister_driver(&mux_driver); |
625 | } | |
626 | ||
627 | module_init(mux_init); | |
628 | module_exit(mux_exit); | |
629 | ||
630 | MODULE_AUTHOR("Ryan Bradetich"); | |
631 | MODULE_DESCRIPTION("Serial MUX driver"); | |
632 | MODULE_LICENSE("GPL"); | |
633 | MODULE_ALIAS_CHARDEV_MAJOR(MUX_MAJOR); |