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Linux 3.12.39
[linux/fpc-iii.git] / drivers / tty / serial / serial_txx9.c
blobce13f42814a353d834f03b56f3e44ba61417fe95
1 /*
2 * Derived from many drivers using generic_serial interface,
3 * especially serial_tx3912.c by Steven J. Hill and r39xx_serial.c
4 * (was in Linux/VR tree) by Jim Pick.
5 *
6 * Copyright (C) 1999 Harald Koerfgen
7 * Copyright (C) 2000 Jim Pick <jim@jimpick.com>
8 * Copyright (C) 2001 Steven J. Hill (sjhill@realitydiluted.com)
9 * Copyright (C) 2000-2002 Toshiba Corporation
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 *
15 * Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller
16 */
17
18 #if defined(CONFIG_SERIAL_TXX9_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
19 #define SUPPORT_SYSRQ
20 #endif
21
22 #include <linux/module.h>
23 #include <linux/ioport.h>
24 #include <linux/init.h>
25 #include <linux/console.h>
26 #include <linux/delay.h>
27 #include <linux/platform_device.h>
28 #include <linux/pci.h>
29 #include <linux/serial_core.h>
30 #include <linux/serial.h>
31 #include <linux/tty.h>
32 #include <linux/tty_flip.h>
33
34 #include <asm/io.h>
35
36 static char *serial_version = "1.11";
37 static char *serial_name = "TX39/49 Serial driver";
38
39 #define PASS_LIMIT 256
40
41 #if !defined(CONFIG_SERIAL_TXX9_STDSERIAL)
42 /* "ttyS" is used for standard serial driver */
43 #define TXX9_TTY_NAME "ttyTX"
44 #define TXX9_TTY_MINOR_START 196
45 #define TXX9_TTY_MAJOR 204
46 #else
47 /* acts like standard serial driver */
48 #define TXX9_TTY_NAME "ttyS"
49 #define TXX9_TTY_MINOR_START 64
50 #define TXX9_TTY_MAJOR TTY_MAJOR
51 #endif
52
53 /* flag aliases */
54 #define UPF_TXX9_HAVE_CTS_LINE UPF_BUGGY_UART
55 #define UPF_TXX9_USE_SCLK UPF_MAGIC_MULTIPLIER
56
57 #ifdef CONFIG_PCI
58 /* support for Toshiba TC86C001 SIO */
59 #define ENABLE_SERIAL_TXX9_PCI
60 #endif
61
62 /*
63 * Number of serial ports
64 */
65 #define UART_NR CONFIG_SERIAL_TXX9_NR_UARTS
66
67 struct uart_txx9_port {
68 struct uart_port port;
69 /* No additional info for now */
70 };
71
72 #define TXX9_REGION_SIZE 0x24
73
74 /* TXX9 Serial Registers */
75 #define TXX9_SILCR 0x00
76 #define TXX9_SIDICR 0x04
77 #define TXX9_SIDISR 0x08
78 #define TXX9_SICISR 0x0c
79 #define TXX9_SIFCR 0x10
80 #define TXX9_SIFLCR 0x14
81 #define TXX9_SIBGR 0x18
82 #define TXX9_SITFIFO 0x1c
83 #define TXX9_SIRFIFO 0x20
84
85 /* SILCR : Line Control */
86 #define TXX9_SILCR_SCS_MASK 0x00000060
87 #define TXX9_SILCR_SCS_IMCLK 0x00000000
88 #define TXX9_SILCR_SCS_IMCLK_BG 0x00000020
89 #define TXX9_SILCR_SCS_SCLK 0x00000040
90 #define TXX9_SILCR_SCS_SCLK_BG 0x00000060
91 #define TXX9_SILCR_UEPS 0x00000010
92 #define TXX9_SILCR_UPEN 0x00000008
93 #define TXX9_SILCR_USBL_MASK 0x00000004
94 #define TXX9_SILCR_USBL_1BIT 0x00000000
95 #define TXX9_SILCR_USBL_2BIT 0x00000004
96 #define TXX9_SILCR_UMODE_MASK 0x00000003
97 #define TXX9_SILCR_UMODE_8BIT 0x00000000
98 #define TXX9_SILCR_UMODE_7BIT 0x00000001
99
100 /* SIDICR : DMA/Int. Control */
101 #define TXX9_SIDICR_TDE 0x00008000
102 #define TXX9_SIDICR_RDE 0x00004000
103 #define TXX9_SIDICR_TIE 0x00002000
104 #define TXX9_SIDICR_RIE 0x00001000
105 #define TXX9_SIDICR_SPIE 0x00000800
106 #define TXX9_SIDICR_CTSAC 0x00000600
107 #define TXX9_SIDICR_STIE_MASK 0x0000003f
108 #define TXX9_SIDICR_STIE_OERS 0x00000020
109 #define TXX9_SIDICR_STIE_CTSS 0x00000010
110 #define TXX9_SIDICR_STIE_RBRKD 0x00000008
111 #define TXX9_SIDICR_STIE_TRDY 0x00000004
112 #define TXX9_SIDICR_STIE_TXALS 0x00000002
113 #define TXX9_SIDICR_STIE_UBRKD 0x00000001
114
115 /* SIDISR : DMA/Int. Status */
116 #define TXX9_SIDISR_UBRK 0x00008000
117 #define TXX9_SIDISR_UVALID 0x00004000
118 #define TXX9_SIDISR_UFER 0x00002000
119 #define TXX9_SIDISR_UPER 0x00001000
120 #define TXX9_SIDISR_UOER 0x00000800
121 #define TXX9_SIDISR_ERI 0x00000400
122 #define TXX9_SIDISR_TOUT 0x00000200
123 #define TXX9_SIDISR_TDIS 0x00000100
124 #define TXX9_SIDISR_RDIS 0x00000080
125 #define TXX9_SIDISR_STIS 0x00000040
126 #define TXX9_SIDISR_RFDN_MASK 0x0000001f
127
128 /* SICISR : Change Int. Status */
129 #define TXX9_SICISR_OERS 0x00000020
130 #define TXX9_SICISR_CTSS 0x00000010
131 #define TXX9_SICISR_RBRKD 0x00000008
132 #define TXX9_SICISR_TRDY 0x00000004
133 #define TXX9_SICISR_TXALS 0x00000002
134 #define TXX9_SICISR_UBRKD 0x00000001
135
136 /* SIFCR : FIFO Control */
137 #define TXX9_SIFCR_SWRST 0x00008000
138 #define TXX9_SIFCR_RDIL_MASK 0x00000180
139 #define TXX9_SIFCR_RDIL_1 0x00000000
140 #define TXX9_SIFCR_RDIL_4 0x00000080
141 #define TXX9_SIFCR_RDIL_8 0x00000100
142 #define TXX9_SIFCR_RDIL_12 0x00000180
143 #define TXX9_SIFCR_RDIL_MAX 0x00000180
144 #define TXX9_SIFCR_TDIL_MASK 0x00000018
145 #define TXX9_SIFCR_TDIL_MASK 0x00000018
146 #define TXX9_SIFCR_TDIL_1 0x00000000
147 #define TXX9_SIFCR_TDIL_4 0x00000001
148 #define TXX9_SIFCR_TDIL_8 0x00000010
149 #define TXX9_SIFCR_TDIL_MAX 0x00000010
150 #define TXX9_SIFCR_TFRST 0x00000004
151 #define TXX9_SIFCR_RFRST 0x00000002
152 #define TXX9_SIFCR_FRSTE 0x00000001
153 #define TXX9_SIO_TX_FIFO 8
154 #define TXX9_SIO_RX_FIFO 16
155
156 /* SIFLCR : Flow Control */
157 #define TXX9_SIFLCR_RCS 0x00001000
158 #define TXX9_SIFLCR_TES 0x00000800
159 #define TXX9_SIFLCR_RTSSC 0x00000200
160 #define TXX9_SIFLCR_RSDE 0x00000100
161 #define TXX9_SIFLCR_TSDE 0x00000080
162 #define TXX9_SIFLCR_RTSTL_MASK 0x0000001e
163 #define TXX9_SIFLCR_RTSTL_MAX 0x0000001e
164 #define TXX9_SIFLCR_TBRK 0x00000001
165
166 /* SIBGR : Baudrate Control */
167 #define TXX9_SIBGR_BCLK_MASK 0x00000300
168 #define TXX9_SIBGR_BCLK_T0 0x00000000
169 #define TXX9_SIBGR_BCLK_T2 0x00000100
170 #define TXX9_SIBGR_BCLK_T4 0x00000200
171 #define TXX9_SIBGR_BCLK_T6 0x00000300
172 #define TXX9_SIBGR_BRD_MASK 0x000000ff
173
174 static inline unsigned int sio_in(struct uart_txx9_port *up, int offset)
175 {
176 switch (up->port.iotype) {
177 default:
178 return __raw_readl(up->port.membase + offset);
179 case UPIO_PORT:
180 return inl(up->port.iobase + offset);
181 }
182 }
183
184 static inline void
185 sio_out(struct uart_txx9_port *up, int offset, int value)
186 {
187 switch (up->port.iotype) {
188 default:
189 __raw_writel(value, up->port.membase + offset);
190 break;
191 case UPIO_PORT:
192 outl(value, up->port.iobase + offset);
193 break;
194 }
195 }
196
197 static inline void
198 sio_mask(struct uart_txx9_port *up, int offset, unsigned int value)
199 {
200 sio_out(up, offset, sio_in(up, offset) & ~value);
201 }
202 static inline void
203 sio_set(struct uart_txx9_port *up, int offset, unsigned int value)
204 {
205 sio_out(up, offset, sio_in(up, offset) | value);
206 }
207
208 static inline void
209 sio_quot_set(struct uart_txx9_port *up, int quot)
210 {
211 quot >>= 1;
212 if (quot < 256)
213 sio_out(up, TXX9_SIBGR, quot | TXX9_SIBGR_BCLK_T0);
214 else if (quot < (256 << 2))
215 sio_out(up, TXX9_SIBGR, (quot >> 2) | TXX9_SIBGR_BCLK_T2);
216 else if (quot < (256 << 4))
217 sio_out(up, TXX9_SIBGR, (quot >> 4) | TXX9_SIBGR_BCLK_T4);
218 else if (quot < (256 << 6))
219 sio_out(up, TXX9_SIBGR, (quot >> 6) | TXX9_SIBGR_BCLK_T6);
220 else
221 sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6);
222 }
223
224 static struct uart_txx9_port *to_uart_txx9_port(struct uart_port *port)
225 {
226 return container_of(port, struct uart_txx9_port, port);
227 }
228
229 static void serial_txx9_stop_tx(struct uart_port *port)
230 {
231 struct uart_txx9_port *up = to_uart_txx9_port(port);
232 sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
233 }
234
235 static void serial_txx9_start_tx(struct uart_port *port)
236 {
237 struct uart_txx9_port *up = to_uart_txx9_port(port);
238 sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
239 }
240
241 static void serial_txx9_stop_rx(struct uart_port *port)
242 {
243 struct uart_txx9_port *up = to_uart_txx9_port(port);
244 up->port.read_status_mask &= ~TXX9_SIDISR_RDIS;
245 }
246
247 static void serial_txx9_enable_ms(struct uart_port *port)
248 {
249 /* TXX9-SIO can not control DTR... */
250 }
251
252 static void serial_txx9_initialize(struct uart_port *port)
253 {
254 struct uart_txx9_port *up = to_uart_txx9_port(port);
255 unsigned int tmout = 10000;
256
257 sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST);
258 /* TX4925 BUG WORKAROUND. Accessing SIOC register
259 * immediately after soft reset causes bus error. */
260 mmiowb();
261 udelay(1);
262 while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout)
263 udelay(1);
264 /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
265 sio_set(up, TXX9_SIFCR,
266 TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1);
267 /* initial settings */
268 sio_out(up, TXX9_SILCR,
269 TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
270 ((up->port.flags & UPF_TXX9_USE_SCLK) ?
271 TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
272 sio_quot_set(up, uart_get_divisor(port, 9600));
273 sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
274 sio_out(up, TXX9_SIDICR, 0);
275 }
276
277 static inline void
278 receive_chars(struct uart_txx9_port *up, unsigned int *status)
279 {
280 unsigned char ch;
281 unsigned int disr = *status;
282 int max_count = 256;
283 char flag;
284 unsigned int next_ignore_status_mask;
285
286 do {
287 ch = sio_in(up, TXX9_SIRFIFO);
288 flag = TTY_NORMAL;
289 up->port.icount.rx++;
290
291 /* mask out RFDN_MASK bit added by previous overrun */
292 next_ignore_status_mask =
293 up->port.ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK;
294 if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER |
295 TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) {
296 /*
297 * For statistics only
298 */
299 if (disr & TXX9_SIDISR_UBRK) {
300 disr &= ~(TXX9_SIDISR_UFER | TXX9_SIDISR_UPER);
301 up->port.icount.brk++;
302 /*
303 * We do the SysRQ and SAK checking
304 * here because otherwise the break
305 * may get masked by ignore_status_mask
306 * or read_status_mask.
307 */
308 if (uart_handle_break(&up->port))
309 goto ignore_char;
310 } else if (disr & TXX9_SIDISR_UPER)
311 up->port.icount.parity++;
312 else if (disr & TXX9_SIDISR_UFER)
313 up->port.icount.frame++;
314 if (disr & TXX9_SIDISR_UOER) {
315 up->port.icount.overrun++;
316 /*
317 * The receiver read buffer still hold
318 * a char which caused overrun.
319 * Ignore next char by adding RFDN_MASK
320 * to ignore_status_mask temporarily.
321 */
322 next_ignore_status_mask |=
323 TXX9_SIDISR_RFDN_MASK;
324 }
325
326 /*
327 * Mask off conditions which should be ingored.
328 */
329 disr &= up->port.read_status_mask;
330
331 if (disr & TXX9_SIDISR_UBRK) {
332 flag = TTY_BREAK;
333 } else if (disr & TXX9_SIDISR_UPER)
334 flag = TTY_PARITY;
335 else if (disr & TXX9_SIDISR_UFER)
336 flag = TTY_FRAME;
337 }
338 if (uart_handle_sysrq_char(&up->port, ch))
339 goto ignore_char;
340
341 uart_insert_char(&up->port, disr, TXX9_SIDISR_UOER, ch, flag);
342
343 ignore_char:
344 up->port.ignore_status_mask = next_ignore_status_mask;
345 disr = sio_in(up, TXX9_SIDISR);
346 } while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0));
347 spin_unlock(&up->port.lock);
348 tty_flip_buffer_push(&up->port.state->port);
349 spin_lock(&up->port.lock);
350 *status = disr;
351 }
352
353 static inline void transmit_chars(struct uart_txx9_port *up)
354 {
355 struct circ_buf *xmit = &up->port.state->xmit;
356 int count;
357
358 if (up->port.x_char) {
359 sio_out(up, TXX9_SITFIFO, up->port.x_char);
360 up->port.icount.tx++;
361 up->port.x_char = 0;
362 return;
363 }
364 if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
365 serial_txx9_stop_tx(&up->port);
366 return;
367 }
368
369 count = TXX9_SIO_TX_FIFO;
370 do {
371 sio_out(up, TXX9_SITFIFO, xmit->buf[xmit->tail]);
372 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
373 up->port.icount.tx++;
374 if (uart_circ_empty(xmit))
375 break;
376 } while (--count > 0);
377
378 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
379 uart_write_wakeup(&up->port);
380
381 if (uart_circ_empty(xmit))
382 serial_txx9_stop_tx(&up->port);
383 }
384
385 static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id)
386 {
387 int pass_counter = 0;
388 struct uart_txx9_port *up = dev_id;
389 unsigned int status;
390
391 while (1) {
392 spin_lock(&up->port.lock);
393 status = sio_in(up, TXX9_SIDISR);
394 if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE))
395 status &= ~TXX9_SIDISR_TDIS;
396 if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
397 TXX9_SIDISR_TOUT))) {
398 spin_unlock(&up->port.lock);
399 break;
400 }
401
402 if (status & TXX9_SIDISR_RDIS)
403 receive_chars(up, &status);
404 if (status & TXX9_SIDISR_TDIS)
405 transmit_chars(up);
406 /* Clear TX/RX Int. Status */
407 sio_mask(up, TXX9_SIDISR,
408 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
409 TXX9_SIDISR_TOUT);
410 spin_unlock(&up->port.lock);
411
412 if (pass_counter++ > PASS_LIMIT)
413 break;
414 }
415
416 return pass_counter ? IRQ_HANDLED : IRQ_NONE;
417 }
418
419 static unsigned int serial_txx9_tx_empty(struct uart_port *port)
420 {
421 struct uart_txx9_port *up = to_uart_txx9_port(port);
422 unsigned long flags;
423 unsigned int ret;
424
425 spin_lock_irqsave(&up->port.lock, flags);
426 ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0;
427 spin_unlock_irqrestore(&up->port.lock, flags);
428
429 return ret;
430 }
431
432 static unsigned int serial_txx9_get_mctrl(struct uart_port *port)
433 {
434 struct uart_txx9_port *up = to_uart_txx9_port(port);
435 unsigned int ret;
436
437 /* no modem control lines */
438 ret = TIOCM_CAR | TIOCM_DSR;
439 ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS;
440 ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS;
441
442 return ret;
443 }
444
445 static void serial_txx9_set_mctrl(struct uart_port *port, unsigned int mctrl)
446 {
447 struct uart_txx9_port *up = to_uart_txx9_port(port);
448
449 if (mctrl & TIOCM_RTS)
450 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
451 else
452 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
453 }
454
455 static void serial_txx9_break_ctl(struct uart_port *port, int break_state)
456 {
457 struct uart_txx9_port *up = to_uart_txx9_port(port);
458 unsigned long flags;
459
460 spin_lock_irqsave(&up->port.lock, flags);
461 if (break_state == -1)
462 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
463 else
464 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
465 spin_unlock_irqrestore(&up->port.lock, flags);
466 }
467
468 #if defined(CONFIG_SERIAL_TXX9_CONSOLE) || defined(CONFIG_CONSOLE_POLL)
469 /*
470 * Wait for transmitter & holding register to empty
471 */
472 static void wait_for_xmitr(struct uart_txx9_port *up)
473 {
474 unsigned int tmout = 10000;
475
476 /* Wait up to 10ms for the character(s) to be sent. */
477 while (--tmout &&
478 !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS))
479 udelay(1);
480
481 /* Wait up to 1s for flow control if necessary */
482 if (up->port.flags & UPF_CONS_FLOW) {
483 tmout = 1000000;
484 while (--tmout &&
485 (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS))
486 udelay(1);
487 }
488 }
489 #endif
490
491 #ifdef CONFIG_CONSOLE_POLL
492 /*
493 * Console polling routines for writing and reading from the uart while
494 * in an interrupt or debug context.
495 */
496
497 static int serial_txx9_get_poll_char(struct uart_port *port)
498 {
499 unsigned int ier;
500 unsigned char c;
501 struct uart_txx9_port *up = to_uart_txx9_port(port);
502
503 /*
504 * First save the IER then disable the interrupts
505 */
506 ier = sio_in(up, TXX9_SIDICR);
507 sio_out(up, TXX9_SIDICR, 0);
508
509 while (sio_in(up, TXX9_SIDISR) & TXX9_SIDISR_UVALID)
510 ;
511
512 c = sio_in(up, TXX9_SIRFIFO);
513
514 /*
515 * Finally, clear RX interrupt status
516 * and restore the IER
517 */
518 sio_mask(up, TXX9_SIDISR, TXX9_SIDISR_RDIS);
519 sio_out(up, TXX9_SIDICR, ier);
520 return c;
521 }
522
523
524 static void serial_txx9_put_poll_char(struct uart_port *port, unsigned char c)
525 {
526 unsigned int ier;
527 struct uart_txx9_port *up = to_uart_txx9_port(port);
528
529 /*
530 * First save the IER then disable the interrupts
531 */
532 ier = sio_in(up, TXX9_SIDICR);
533 sio_out(up, TXX9_SIDICR, 0);
534
535 wait_for_xmitr(up);
536 /*
537 * Send the character out.
538 * If a LF, also do CR...
539 */
540 sio_out(up, TXX9_SITFIFO, c);
541 if (c == 10) {
542 wait_for_xmitr(up);
543 sio_out(up, TXX9_SITFIFO, 13);
544 }
545
546 /*
547 * Finally, wait for transmitter to become empty
548 * and restore the IER
549 */
550 wait_for_xmitr(up);
551 sio_out(up, TXX9_SIDICR, ier);
552 }
553
554 #endif /* CONFIG_CONSOLE_POLL */
555
556 static int serial_txx9_startup(struct uart_port *port)
557 {
558 struct uart_txx9_port *up = to_uart_txx9_port(port);
559 unsigned long flags;
560 int retval;
561
562 /*
563 * Clear the FIFO buffers and disable them.
564 * (they will be reenabled in set_termios())
565 */
566 sio_set(up, TXX9_SIFCR,
567 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
568 /* clear reset */
569 sio_mask(up, TXX9_SIFCR,
570 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
571 sio_out(up, TXX9_SIDICR, 0);
572
573 /*
574 * Clear the interrupt registers.
575 */
576 sio_out(up, TXX9_SIDISR, 0);
577
578 retval = request_irq(up->port.irq, serial_txx9_interrupt,
579 IRQF_SHARED, "serial_txx9", up);
580 if (retval)
581 return retval;
582
583 /*
584 * Now, initialize the UART
585 */
586 spin_lock_irqsave(&up->port.lock, flags);
587 serial_txx9_set_mctrl(&up->port, up->port.mctrl);
588 spin_unlock_irqrestore(&up->port.lock, flags);
589
590 /* Enable RX/TX */
591 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
592
593 /*
594 * Finally, enable interrupts.
595 */
596 sio_set(up, TXX9_SIDICR, TXX9_SIDICR_RIE);
597
598 return 0;
599 }
600
601 static void serial_txx9_shutdown(struct uart_port *port)
602 {
603 struct uart_txx9_port *up = to_uart_txx9_port(port);
604 unsigned long flags;
605
606 /*
607 * Disable interrupts from this port
608 */
609 sio_out(up, TXX9_SIDICR, 0); /* disable all intrs */
610
611 spin_lock_irqsave(&up->port.lock, flags);
612 serial_txx9_set_mctrl(&up->port, up->port.mctrl);
613 spin_unlock_irqrestore(&up->port.lock, flags);
614
615 /*
616 * Disable break condition
617 */
618 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
619
620 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
621 if (up->port.cons && up->port.line == up->port.cons->index) {
622 free_irq(up->port.irq, up);
623 return;
624 }
625 #endif
626 /* reset FIFOs */
627 sio_set(up, TXX9_SIFCR,
628 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
629 /* clear reset */
630 sio_mask(up, TXX9_SIFCR,
631 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
632
633 /* Disable RX/TX */
634 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
635
636 free_irq(up->port.irq, up);
637 }
638
639 static void
640 serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios,
641 struct ktermios *old)
642 {
643 struct uart_txx9_port *up = to_uart_txx9_port(port);
644 unsigned int cval, fcr = 0;
645 unsigned long flags;
646 unsigned int baud, quot;
647
648 /*
649 * We don't support modem control lines.
650 */
651 termios->c_cflag &= ~(HUPCL | CMSPAR);
652 termios->c_cflag |= CLOCAL;
653
654 cval = sio_in(up, TXX9_SILCR);
655 /* byte size and parity */
656 cval &= ~TXX9_SILCR_UMODE_MASK;
657 switch (termios->c_cflag & CSIZE) {
658 case CS7:
659 cval |= TXX9_SILCR_UMODE_7BIT;
660 break;
661 default:
662 case CS5: /* not supported */
663 case CS6: /* not supported */
664 case CS8:
665 cval |= TXX9_SILCR_UMODE_8BIT;
666 break;
667 }
668
669 cval &= ~TXX9_SILCR_USBL_MASK;
670 if (termios->c_cflag & CSTOPB)
671 cval |= TXX9_SILCR_USBL_2BIT;
672 else
673 cval |= TXX9_SILCR_USBL_1BIT;
674 cval &= ~(TXX9_SILCR_UPEN | TXX9_SILCR_UEPS);
675 if (termios->c_cflag & PARENB)
676 cval |= TXX9_SILCR_UPEN;
677 if (!(termios->c_cflag & PARODD))
678 cval |= TXX9_SILCR_UEPS;
679
680 /*
681 * Ask the core to calculate the divisor for us.
682 */
683 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16/2);
684 quot = uart_get_divisor(port, baud);
685
686 /* Set up FIFOs */
687 /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
688 fcr = TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1;
689
690 /*
691 * Ok, we're now changing the port state. Do it with
692 * interrupts disabled.
693 */
694 spin_lock_irqsave(&up->port.lock, flags);
695
696 /*
697 * Update the per-port timeout.
698 */
699 uart_update_timeout(port, termios->c_cflag, baud);
700
701 up->port.read_status_mask = TXX9_SIDISR_UOER |
702 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS;
703 if (termios->c_iflag & INPCK)
704 up->port.read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER;
705 if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK))
706 up->port.read_status_mask |= TXX9_SIDISR_UBRK;
707
708 /*
709 * Characteres to ignore
710 */
711 up->port.ignore_status_mask = 0;
712 if (termios->c_iflag & IGNPAR)
713 up->port.ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER;
714 if (termios->c_iflag & IGNBRK) {
715 up->port.ignore_status_mask |= TXX9_SIDISR_UBRK;
716 /*
717 * If we're ignoring parity and break indicators,
718 * ignore overruns too (for real raw support).
719 */
720 if (termios->c_iflag & IGNPAR)
721 up->port.ignore_status_mask |= TXX9_SIDISR_UOER;
722 }
723
724 /*
725 * ignore all characters if CREAD is not set
726 */
727 if ((termios->c_cflag & CREAD) == 0)
728 up->port.ignore_status_mask |= TXX9_SIDISR_RDIS;
729
730 /* CTS flow control flag */
731 if ((termios->c_cflag & CRTSCTS) &&
732 (up->port.flags & UPF_TXX9_HAVE_CTS_LINE)) {
733 sio_set(up, TXX9_SIFLCR,
734 TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
735 } else {
736 sio_mask(up, TXX9_SIFLCR,
737 TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
738 }
739
740 sio_out(up, TXX9_SILCR, cval);
741 sio_quot_set(up, quot);
742 sio_out(up, TXX9_SIFCR, fcr);
743
744 serial_txx9_set_mctrl(&up->port, up->port.mctrl);
745 spin_unlock_irqrestore(&up->port.lock, flags);
746 }
747
748 static void
749 serial_txx9_pm(struct uart_port *port, unsigned int state,
750 unsigned int oldstate)
751 {
752 /*
753 * If oldstate was -1 this is called from
754 * uart_configure_port(). In this case do not initialize the
755 * port now, because the port was already initialized (for
756 * non-console port) or should not be initialized here (for
757 * console port). If we initialized the port here we lose
758 * serial console settings.
759 */
760 if (state == 0 && oldstate != -1)
761 serial_txx9_initialize(port);
762 }
763
764 static int serial_txx9_request_resource(struct uart_txx9_port *up)
765 {
766 unsigned int size = TXX9_REGION_SIZE;
767 int ret = 0;
768
769 switch (up->port.iotype) {
770 default:
771 if (!up->port.mapbase)
772 break;
773
774 if (!request_mem_region(up->port.mapbase, size, "serial_txx9")) {
775 ret = -EBUSY;
776 break;
777 }
778
779 if (up->port.flags & UPF_IOREMAP) {
780 up->port.membase = ioremap(up->port.mapbase, size);
781 if (!up->port.membase) {
782 release_mem_region(up->port.mapbase, size);
783 ret = -ENOMEM;
784 }
785 }
786 break;
787
788 case UPIO_PORT:
789 if (!request_region(up->port.iobase, size, "serial_txx9"))
790 ret = -EBUSY;
791 break;
792 }
793 return ret;
794 }
795
796 static void serial_txx9_release_resource(struct uart_txx9_port *up)
797 {
798 unsigned int size = TXX9_REGION_SIZE;
799
800 switch (up->port.iotype) {
801 default:
802 if (!up->port.mapbase)
803 break;
804
805 if (up->port.flags & UPF_IOREMAP) {
806 iounmap(up->port.membase);
807 up->port.membase = NULL;
808 }
809
810 release_mem_region(up->port.mapbase, size);
811 break;
812
813 case UPIO_PORT:
814 release_region(up->port.iobase, size);
815 break;
816 }
817 }
818
819 static void serial_txx9_release_port(struct uart_port *port)
820 {
821 struct uart_txx9_port *up = to_uart_txx9_port(port);
822 serial_txx9_release_resource(up);
823 }
824
825 static int serial_txx9_request_port(struct uart_port *port)
826 {
827 struct uart_txx9_port *up = to_uart_txx9_port(port);
828 return serial_txx9_request_resource(up);
829 }
830
831 static void serial_txx9_config_port(struct uart_port *port, int uflags)
832 {
833 struct uart_txx9_port *up = to_uart_txx9_port(port);
834 int ret;
835
836 /*
837 * Find the region that we can probe for. This in turn
838 * tells us whether we can probe for the type of port.
839 */
840 ret = serial_txx9_request_resource(up);
841 if (ret < 0)
842 return;
843 port->type = PORT_TXX9;
844 up->port.fifosize = TXX9_SIO_TX_FIFO;
845
846 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
847 if (up->port.line == up->port.cons->index)
848 return;
849 #endif
850 serial_txx9_initialize(port);
851 }
852
853 static const char *
854 serial_txx9_type(struct uart_port *port)
855 {
856 return "txx9";
857 }
858
859 static struct uart_ops serial_txx9_pops = {
860 .tx_empty = serial_txx9_tx_empty,
861 .set_mctrl = serial_txx9_set_mctrl,
862 .get_mctrl = serial_txx9_get_mctrl,
863 .stop_tx = serial_txx9_stop_tx,
864 .start_tx = serial_txx9_start_tx,
865 .stop_rx = serial_txx9_stop_rx,
866 .enable_ms = serial_txx9_enable_ms,
867 .break_ctl = serial_txx9_break_ctl,
868 .startup = serial_txx9_startup,
869 .shutdown = serial_txx9_shutdown,
870 .set_termios = serial_txx9_set_termios,
871 .pm = serial_txx9_pm,
872 .type = serial_txx9_type,
873 .release_port = serial_txx9_release_port,
874 .request_port = serial_txx9_request_port,
875 .config_port = serial_txx9_config_port,
876 #ifdef CONFIG_CONSOLE_POLL
877 .poll_get_char = serial_txx9_get_poll_char,
878 .poll_put_char = serial_txx9_put_poll_char,
879 #endif
880 };
881
882 static struct uart_txx9_port serial_txx9_ports[UART_NR];
883
884 static void __init serial_txx9_register_ports(struct uart_driver *drv,
885 struct device *dev)
886 {
887 int i;
888
889 for (i = 0; i < UART_NR; i++) {
890 struct uart_txx9_port *up = &serial_txx9_ports[i];
891
892 up->port.line = i;
893 up->port.ops = &serial_txx9_pops;
894 up->port.dev = dev;
895 if (up->port.iobase || up->port.mapbase)
896 uart_add_one_port(drv, &up->port);
897 }
898 }
899
900 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
901
902 static void serial_txx9_console_putchar(struct uart_port *port, int ch)
903 {
904 struct uart_txx9_port *up = to_uart_txx9_port(port);
905
906 wait_for_xmitr(up);
907 sio_out(up, TXX9_SITFIFO, ch);
908 }
909
910 /*
911 * Print a string to the serial port trying not to disturb
912 * any possible real use of the port...
913 *
914 * The console_lock must be held when we get here.
915 */
916 static void
917 serial_txx9_console_write(struct console *co, const char *s, unsigned int count)
918 {
919 struct uart_txx9_port *up = &serial_txx9_ports[co->index];
920 unsigned int ier, flcr;
921
922 /*
923 * First save the UER then disable the interrupts
924 */
925 ier = sio_in(up, TXX9_SIDICR);
926 sio_out(up, TXX9_SIDICR, 0);
927 /*
928 * Disable flow-control if enabled (and unnecessary)
929 */
930 flcr = sio_in(up, TXX9_SIFLCR);
931 if (!(up->port.flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES))
932 sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES);
933
934 uart_console_write(&up->port, s, count, serial_txx9_console_putchar);
935
936 /*
937 * Finally, wait for transmitter to become empty
938 * and restore the IER
939 */
940 wait_for_xmitr(up);
941 sio_out(up, TXX9_SIFLCR, flcr);
942 sio_out(up, TXX9_SIDICR, ier);
943 }
944
945 static int __init serial_txx9_console_setup(struct console *co, char *options)
946 {
947 struct uart_port *port;
948 struct uart_txx9_port *up;
949 int baud = 9600;
950 int bits = 8;
951 int parity = 'n';
952 int flow = 'n';
953
954 /*
955 * Check whether an invalid uart number has been specified, and
956 * if so, search for the first available port that does have
957 * console support.
958 */
959 if (co->index >= UART_NR)
960 co->index = 0;
961 up = &serial_txx9_ports[co->index];
962 port = &up->port;
963 if (!port->ops)
964 return -ENODEV;
965
966 serial_txx9_initialize(&up->port);
967
968 if (options)
969 uart_parse_options(options, &baud, &parity, &bits, &flow);
970
971 return uart_set_options(port, co, baud, parity, bits, flow);
972 }
973
974 static struct uart_driver serial_txx9_reg;
975 static struct console serial_txx9_console = {
976 .name = TXX9_TTY_NAME,
977 .write = serial_txx9_console_write,
978 .device = uart_console_device,
979 .setup = serial_txx9_console_setup,
980 .flags = CON_PRINTBUFFER,
981 .index = -1,
982 .data = &serial_txx9_reg,
983 };
984
985 static int __init serial_txx9_console_init(void)
986 {
987 register_console(&serial_txx9_console);
988 return 0;
989 }
990 console_initcall(serial_txx9_console_init);
991
992 #define SERIAL_TXX9_CONSOLE &serial_txx9_console
993 #else
994 #define SERIAL_TXX9_CONSOLE NULL
995 #endif
996
997 static struct uart_driver serial_txx9_reg = {
998 .owner = THIS_MODULE,
999 .driver_name = "serial_txx9",
1000 .dev_name = TXX9_TTY_NAME,
1001 .major = TXX9_TTY_MAJOR,
1002 .minor = TXX9_TTY_MINOR_START,
1003 .nr = UART_NR,
1004 .cons = SERIAL_TXX9_CONSOLE,
1005 };
1006
1007 int __init early_serial_txx9_setup(struct uart_port *port)
1008 {
1009 if (port->line >= ARRAY_SIZE(serial_txx9_ports))
1010 return -ENODEV;
1011
1012 serial_txx9_ports[port->line].port = *port;
1013 serial_txx9_ports[port->line].port.ops = &serial_txx9_pops;
1014 serial_txx9_ports[port->line].port.flags |=
1015 UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
1016 return 0;
1017 }
1018
1019 static DEFINE_MUTEX(serial_txx9_mutex);
1020
1021 /**
1022 * serial_txx9_register_port - register a serial port
1023 * @port: serial port template
1024 *
1025 * Configure the serial port specified by the request.
1026 *
1027 * The port is then probed and if necessary the IRQ is autodetected
1028 * If this fails an error is returned.
1029 *
1030 * On success the port is ready to use and the line number is returned.
1031 */
1032 static int serial_txx9_register_port(struct uart_port *port)
1033 {
1034 int i;
1035 struct uart_txx9_port *uart;
1036 int ret = -ENOSPC;
1037
1038 mutex_lock(&serial_txx9_mutex);
1039 for (i = 0; i < UART_NR; i++) {
1040 uart = &serial_txx9_ports[i];
1041 if (uart_match_port(&uart->port, port)) {
1042 uart_remove_one_port(&serial_txx9_reg, &uart->port);
1043 break;
1044 }
1045 }
1046 if (i == UART_NR) {
1047 /* Find unused port */
1048 for (i = 0; i < UART_NR; i++) {
1049 uart = &serial_txx9_ports[i];
1050 if (!(uart->port.iobase || uart->port.mapbase))
1051 break;
1052 }
1053 }
1054 if (i < UART_NR) {
1055 uart->port.iobase = port->iobase;
1056 uart->port.membase = port->membase;
1057 uart->port.irq = port->irq;
1058 uart->port.uartclk = port->uartclk;
1059 uart->port.iotype = port->iotype;
1060 uart->port.flags = port->flags
1061 | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
1062 uart->port.mapbase = port->mapbase;
1063 if (port->dev)
1064 uart->port.dev = port->dev;
1065 ret = uart_add_one_port(&serial_txx9_reg, &uart->port);
1066 if (ret == 0)
1067 ret = uart->port.line;
1068 }
1069 mutex_unlock(&serial_txx9_mutex);
1070 return ret;
1071 }
1072
1073 /**
1074 * serial_txx9_unregister_port - remove a txx9 serial port at runtime
1075 * @line: serial line number
1076 *
1077 * Remove one serial port. This may not be called from interrupt
1078 * context. We hand the port back to the our control.
1079 */
1080 static void serial_txx9_unregister_port(int line)
1081 {
1082 struct uart_txx9_port *uart = &serial_txx9_ports[line];
1083
1084 mutex_lock(&serial_txx9_mutex);
1085 uart_remove_one_port(&serial_txx9_reg, &uart->port);
1086 uart->port.flags = 0;
1087 uart->port.type = PORT_UNKNOWN;
1088 uart->port.iobase = 0;
1089 uart->port.mapbase = 0;
1090 uart->port.membase = NULL;
1091 uart->port.dev = NULL;
1092 mutex_unlock(&serial_txx9_mutex);
1093 }
1094
1095 /*
1096 * Register a set of serial devices attached to a platform device.
1097 */
1098 static int serial_txx9_probe(struct platform_device *dev)
1099 {
1100 struct uart_port *p = dev_get_platdata(&dev->dev);
1101 struct uart_port port;
1102 int ret, i;
1103
1104 memset(&port, 0, sizeof(struct uart_port));
1105 for (i = 0; p && p->uartclk != 0; p++, i++) {
1106 port.iobase = p->iobase;
1107 port.membase = p->membase;
1108 port.irq = p->irq;
1109 port.uartclk = p->uartclk;
1110 port.iotype = p->iotype;
1111 port.flags = p->flags;
1112 port.mapbase = p->mapbase;
1113 port.dev = &dev->dev;
1114 ret = serial_txx9_register_port(&port);
1115 if (ret < 0) {
1116 dev_err(&dev->dev, "unable to register port at index %d "
1117 "(IO%lx MEM%llx IRQ%d): %d\n", i,
1118 p->iobase, (unsigned long long)p->mapbase,
1119 p->irq, ret);
1120 }
1121 }
1122 return 0;
1123 }
1124
1125 /*
1126 * Remove serial ports registered against a platform device.
1127 */
1128 static int serial_txx9_remove(struct platform_device *dev)
1129 {
1130 int i;
1131
1132 for (i = 0; i < UART_NR; i++) {
1133 struct uart_txx9_port *up = &serial_txx9_ports[i];
1134
1135 if (up->port.dev == &dev->dev)
1136 serial_txx9_unregister_port(i);
1137 }
1138 return 0;
1139 }
1140
1141 #ifdef CONFIG_PM
1142 static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state)
1143 {
1144 int i;
1145
1146 for (i = 0; i < UART_NR; i++) {
1147 struct uart_txx9_port *up = &serial_txx9_ports[i];
1148
1149 if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
1150 uart_suspend_port(&serial_txx9_reg, &up->port);
1151 }
1152
1153 return 0;
1154 }
1155
1156 static int serial_txx9_resume(struct platform_device *dev)
1157 {
1158 int i;
1159
1160 for (i = 0; i < UART_NR; i++) {
1161 struct uart_txx9_port *up = &serial_txx9_ports[i];
1162
1163 if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
1164 uart_resume_port(&serial_txx9_reg, &up->port);
1165 }
1166
1167 return 0;
1168 }
1169 #endif
1170
1171 static struct platform_driver serial_txx9_plat_driver = {
1172 .probe = serial_txx9_probe,
1173 .remove = serial_txx9_remove,
1174 #ifdef CONFIG_PM
1175 .suspend = serial_txx9_suspend,
1176 .resume = serial_txx9_resume,
1177 #endif
1178 .driver = {
1179 .name = "serial_txx9",
1180 .owner = THIS_MODULE,
1181 },
1182 };
1183
1184 #ifdef ENABLE_SERIAL_TXX9_PCI
1185 /*
1186 * Probe one serial board. Unfortunately, there is no rhyme nor reason
1187 * to the arrangement of serial ports on a PCI card.
1188 */
1189 static int
1190 pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
1191 {
1192 struct uart_port port;
1193 int line;
1194 int rc;
1195
1196 rc = pci_enable_device(dev);
1197 if (rc)
1198 return rc;
1199
1200 memset(&port, 0, sizeof(port));
1201 port.ops = &serial_txx9_pops;
1202 port.flags |= UPF_TXX9_HAVE_CTS_LINE;
1203 port.uartclk = 66670000;
1204 port.irq = dev->irq;
1205 port.iotype = UPIO_PORT;
1206 port.iobase = pci_resource_start(dev, 1);
1207 port.dev = &dev->dev;
1208 line = serial_txx9_register_port(&port);
1209 if (line < 0) {
1210 printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line);
1211 pci_disable_device(dev);
1212 return line;
1213 }
1214 pci_set_drvdata(dev, &serial_txx9_ports[line]);
1215
1216 return 0;
1217 }
1218
1219 static void pciserial_txx9_remove_one(struct pci_dev *dev)
1220 {
1221 struct uart_txx9_port *up = pci_get_drvdata(dev);
1222
1223 pci_set_drvdata(dev, NULL);
1224
1225 if (up) {
1226 serial_txx9_unregister_port(up->port.line);
1227 pci_disable_device(dev);
1228 }
1229 }
1230
1231 #ifdef CONFIG_PM
1232 static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)
1233 {
1234 struct uart_txx9_port *up = pci_get_drvdata(dev);
1235
1236 if (up)
1237 uart_suspend_port(&serial_txx9_reg, &up->port);
1238 pci_save_state(dev);
1239 pci_set_power_state(dev, pci_choose_state(dev, state));
1240 return 0;
1241 }
1242
1243 static int pciserial_txx9_resume_one(struct pci_dev *dev)
1244 {
1245 struct uart_txx9_port *up = pci_get_drvdata(dev);
1246
1247 pci_set_power_state(dev, PCI_D0);
1248 pci_restore_state(dev);
1249 if (up)
1250 uart_resume_port(&serial_txx9_reg, &up->port);
1251 return 0;
1252 }
1253 #endif
1254
1255 static const struct pci_device_id serial_txx9_pci_tbl[] = {
1256 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC) },
1257 { 0, }
1258 };
1259
1260 static struct pci_driver serial_txx9_pci_driver = {
1261 .name = "serial_txx9",
1262 .probe = pciserial_txx9_init_one,
1263 .remove = pciserial_txx9_remove_one,
1264 #ifdef CONFIG_PM
1265 .suspend = pciserial_txx9_suspend_one,
1266 .resume = pciserial_txx9_resume_one,
1267 #endif
1268 .id_table = serial_txx9_pci_tbl,
1269 };
1270
1271 MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl);
1272 #endif /* ENABLE_SERIAL_TXX9_PCI */
1273
1274 static struct platform_device *serial_txx9_plat_devs;
1275
1276 static int __init serial_txx9_init(void)
1277 {
1278 int ret;
1279
1280 printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
1281
1282 ret = uart_register_driver(&serial_txx9_reg);
1283 if (ret)
1284 goto out;
1285
1286 serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1);
1287 if (!serial_txx9_plat_devs) {
1288 ret = -ENOMEM;
1289 goto unreg_uart_drv;
1290 }
1291
1292 ret = platform_device_add(serial_txx9_plat_devs);
1293 if (ret)
1294 goto put_dev;
1295
1296 serial_txx9_register_ports(&serial_txx9_reg,
1297 &serial_txx9_plat_devs->dev);
1298
1299 ret = platform_driver_register(&serial_txx9_plat_driver);
1300 if (ret)
1301 goto del_dev;
1302
1303 #ifdef ENABLE_SERIAL_TXX9_PCI
1304 ret = pci_register_driver(&serial_txx9_pci_driver);
1305 #endif
1306 if (ret == 0)
1307 goto out;
1308
1309 del_dev:
1310 platform_device_del(serial_txx9_plat_devs);
1311 put_dev:
1312 platform_device_put(serial_txx9_plat_devs);
1313 unreg_uart_drv:
1314 uart_unregister_driver(&serial_txx9_reg);
1315 out:
1316 return ret;
1317 }
1318
1319 static void __exit serial_txx9_exit(void)
1320 {
1321 int i;
1322
1323 #ifdef ENABLE_SERIAL_TXX9_PCI
1324 pci_unregister_driver(&serial_txx9_pci_driver);
1325 #endif
1326 platform_driver_unregister(&serial_txx9_plat_driver);
1327 platform_device_unregister(serial_txx9_plat_devs);
1328 for (i = 0; i < UART_NR; i++) {
1329 struct uart_txx9_port *up = &serial_txx9_ports[i];
1330 if (up->port.iobase || up->port.mapbase)
1331 uart_remove_one_port(&serial_txx9_reg, &up->port);
1332 }
1333
1334 uart_unregister_driver(&serial_txx9_reg);
1335 }
1336
1337 module_init(serial_txx9_init);
1338 module_exit(serial_txx9_exit);
1339
1340 MODULE_LICENSE("GPL");
1341 MODULE_DESCRIPTION("TX39/49 serial driver");
1342
1343 MODULE_ALIAS_CHARDEV_MAJOR(TXX9_TTY_MAJOR);
Linux with added FPC-III support