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btrfs: make btrfs_set_root_node void
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / tty / serial / serial_txx9.c
blob8e3fc1944e6d9fc671ccb3150532d74be3bc1f6d
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
32 #include <asm/io.h>
33
34 static char *serial_version = "1.11";
35 static char *serial_name = "TX39/49 Serial driver";
36
37 #define PASS_LIMIT 256
38
39 #if !defined(CONFIG_SERIAL_TXX9_STDSERIAL)
40 /* "ttyS" is used for standard serial driver */
41 #define TXX9_TTY_NAME "ttyTX"
42 #define TXX9_TTY_MINOR_START 196
43 #define TXX9_TTY_MAJOR 204
44 #else
45 /* acts like standard serial driver */
46 #define TXX9_TTY_NAME "ttyS"
47 #define TXX9_TTY_MINOR_START 64
48 #define TXX9_TTY_MAJOR TTY_MAJOR
49 #endif
50
51 /* flag aliases */
52 #define UPF_TXX9_HAVE_CTS_LINE UPF_BUGGY_UART
53 #define UPF_TXX9_USE_SCLK UPF_MAGIC_MULTIPLIER
54
55 #ifdef CONFIG_PCI
56 /* support for Toshiba TC86C001 SIO */
57 #define ENABLE_SERIAL_TXX9_PCI
58 #endif
59
60 /*
61 * Number of serial ports
62 */
63 #define UART_NR CONFIG_SERIAL_TXX9_NR_UARTS
64
65 struct uart_txx9_port {
66 struct uart_port port;
67 /* No additional info for now */
68 };
69
70 #define TXX9_REGION_SIZE 0x24
71
72 /* TXX9 Serial Registers */
73 #define TXX9_SILCR 0x00
74 #define TXX9_SIDICR 0x04
75 #define TXX9_SIDISR 0x08
76 #define TXX9_SICISR 0x0c
77 #define TXX9_SIFCR 0x10
78 #define TXX9_SIFLCR 0x14
79 #define TXX9_SIBGR 0x18
80 #define TXX9_SITFIFO 0x1c
81 #define TXX9_SIRFIFO 0x20
82
83 /* SILCR : Line Control */
84 #define TXX9_SILCR_SCS_MASK 0x00000060
85 #define TXX9_SILCR_SCS_IMCLK 0x00000000
86 #define TXX9_SILCR_SCS_IMCLK_BG 0x00000020
87 #define TXX9_SILCR_SCS_SCLK 0x00000040
88 #define TXX9_SILCR_SCS_SCLK_BG 0x00000060
89 #define TXX9_SILCR_UEPS 0x00000010
90 #define TXX9_SILCR_UPEN 0x00000008
91 #define TXX9_SILCR_USBL_MASK 0x00000004
92 #define TXX9_SILCR_USBL_1BIT 0x00000000
93 #define TXX9_SILCR_USBL_2BIT 0x00000004
94 #define TXX9_SILCR_UMODE_MASK 0x00000003
95 #define TXX9_SILCR_UMODE_8BIT 0x00000000
96 #define TXX9_SILCR_UMODE_7BIT 0x00000001
97
98 /* SIDICR : DMA/Int. Control */
99 #define TXX9_SIDICR_TDE 0x00008000
100 #define TXX9_SIDICR_RDE 0x00004000
101 #define TXX9_SIDICR_TIE 0x00002000
102 #define TXX9_SIDICR_RIE 0x00001000
103 #define TXX9_SIDICR_SPIE 0x00000800
104 #define TXX9_SIDICR_CTSAC 0x00000600
105 #define TXX9_SIDICR_STIE_MASK 0x0000003f
106 #define TXX9_SIDICR_STIE_OERS 0x00000020
107 #define TXX9_SIDICR_STIE_CTSS 0x00000010
108 #define TXX9_SIDICR_STIE_RBRKD 0x00000008
109 #define TXX9_SIDICR_STIE_TRDY 0x00000004
110 #define TXX9_SIDICR_STIE_TXALS 0x00000002
111 #define TXX9_SIDICR_STIE_UBRKD 0x00000001
112
113 /* SIDISR : DMA/Int. Status */
114 #define TXX9_SIDISR_UBRK 0x00008000
115 #define TXX9_SIDISR_UVALID 0x00004000
116 #define TXX9_SIDISR_UFER 0x00002000
117 #define TXX9_SIDISR_UPER 0x00001000
118 #define TXX9_SIDISR_UOER 0x00000800
119 #define TXX9_SIDISR_ERI 0x00000400
120 #define TXX9_SIDISR_TOUT 0x00000200
121 #define TXX9_SIDISR_TDIS 0x00000100
122 #define TXX9_SIDISR_RDIS 0x00000080
123 #define TXX9_SIDISR_STIS 0x00000040
124 #define TXX9_SIDISR_RFDN_MASK 0x0000001f
125
126 /* SICISR : Change Int. Status */
127 #define TXX9_SICISR_OERS 0x00000020
128 #define TXX9_SICISR_CTSS 0x00000010
129 #define TXX9_SICISR_RBRKD 0x00000008
130 #define TXX9_SICISR_TRDY 0x00000004
131 #define TXX9_SICISR_TXALS 0x00000002
132 #define TXX9_SICISR_UBRKD 0x00000001
133
134 /* SIFCR : FIFO Control */
135 #define TXX9_SIFCR_SWRST 0x00008000
136 #define TXX9_SIFCR_RDIL_MASK 0x00000180
137 #define TXX9_SIFCR_RDIL_1 0x00000000
138 #define TXX9_SIFCR_RDIL_4 0x00000080
139 #define TXX9_SIFCR_RDIL_8 0x00000100
140 #define TXX9_SIFCR_RDIL_12 0x00000180
141 #define TXX9_SIFCR_RDIL_MAX 0x00000180
142 #define TXX9_SIFCR_TDIL_MASK 0x00000018
143 #define TXX9_SIFCR_TDIL_MASK 0x00000018
144 #define TXX9_SIFCR_TDIL_1 0x00000000
145 #define TXX9_SIFCR_TDIL_4 0x00000001
146 #define TXX9_SIFCR_TDIL_8 0x00000010
147 #define TXX9_SIFCR_TDIL_MAX 0x00000010
148 #define TXX9_SIFCR_TFRST 0x00000004
149 #define TXX9_SIFCR_RFRST 0x00000002
150 #define TXX9_SIFCR_FRSTE 0x00000001
151 #define TXX9_SIO_TX_FIFO 8
152 #define TXX9_SIO_RX_FIFO 16
153
154 /* SIFLCR : Flow Control */
155 #define TXX9_SIFLCR_RCS 0x00001000
156 #define TXX9_SIFLCR_TES 0x00000800
157 #define TXX9_SIFLCR_RTSSC 0x00000200
158 #define TXX9_SIFLCR_RSDE 0x00000100
159 #define TXX9_SIFLCR_TSDE 0x00000080
160 #define TXX9_SIFLCR_RTSTL_MASK 0x0000001e
161 #define TXX9_SIFLCR_RTSTL_MAX 0x0000001e
162 #define TXX9_SIFLCR_TBRK 0x00000001
163
164 /* SIBGR : Baudrate Control */
165 #define TXX9_SIBGR_BCLK_MASK 0x00000300
166 #define TXX9_SIBGR_BCLK_T0 0x00000000
167 #define TXX9_SIBGR_BCLK_T2 0x00000100
168 #define TXX9_SIBGR_BCLK_T4 0x00000200
169 #define TXX9_SIBGR_BCLK_T6 0x00000300
170 #define TXX9_SIBGR_BRD_MASK 0x000000ff
171
172 static inline unsigned int sio_in(struct uart_txx9_port *up, int offset)
173 {
174 switch (up->port.iotype) {
175 default:
176 return __raw_readl(up->port.membase + offset);
177 case UPIO_PORT:
178 return inl(up->port.iobase + offset);
179 }
180 }
181
182 static inline void
183 sio_out(struct uart_txx9_port *up, int offset, int value)
184 {
185 switch (up->port.iotype) {
186 default:
187 __raw_writel(value, up->port.membase + offset);
188 break;
189 case UPIO_PORT:
190 outl(value, up->port.iobase + offset);
191 break;
192 }
193 }
194
195 static inline void
196 sio_mask(struct uart_txx9_port *up, int offset, unsigned int value)
197 {
198 sio_out(up, offset, sio_in(up, offset) & ~value);
199 }
200 static inline void
201 sio_set(struct uart_txx9_port *up, int offset, unsigned int value)
202 {
203 sio_out(up, offset, sio_in(up, offset) | value);
204 }
205
206 static inline void
207 sio_quot_set(struct uart_txx9_port *up, int quot)
208 {
209 quot >>= 1;
210 if (quot < 256)
211 sio_out(up, TXX9_SIBGR, quot | TXX9_SIBGR_BCLK_T0);
212 else if (quot < (256 << 2))
213 sio_out(up, TXX9_SIBGR, (quot >> 2) | TXX9_SIBGR_BCLK_T2);
214 else if (quot < (256 << 4))
215 sio_out(up, TXX9_SIBGR, (quot >> 4) | TXX9_SIBGR_BCLK_T4);
216 else if (quot < (256 << 6))
217 sio_out(up, TXX9_SIBGR, (quot >> 6) | TXX9_SIBGR_BCLK_T6);
218 else
219 sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6);
220 }
221
222 static struct uart_txx9_port *to_uart_txx9_port(struct uart_port *port)
223 {
224 return container_of(port, struct uart_txx9_port, port);
225 }
226
227 static void serial_txx9_stop_tx(struct uart_port *port)
228 {
229 struct uart_txx9_port *up = to_uart_txx9_port(port);
230 sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
231 }
232
233 static void serial_txx9_start_tx(struct uart_port *port)
234 {
235 struct uart_txx9_port *up = to_uart_txx9_port(port);
236 sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
237 }
238
239 static void serial_txx9_stop_rx(struct uart_port *port)
240 {
241 struct uart_txx9_port *up = to_uart_txx9_port(port);
242 up->port.read_status_mask &= ~TXX9_SIDISR_RDIS;
243 }
244
245 static void serial_txx9_enable_ms(struct uart_port *port)
246 {
247 /* TXX9-SIO can not control DTR... */
248 }
249
250 static void serial_txx9_initialize(struct uart_port *port)
251 {
252 struct uart_txx9_port *up = to_uart_txx9_port(port);
253 unsigned int tmout = 10000;
254
255 sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST);
256 /* TX4925 BUG WORKAROUND. Accessing SIOC register
257 * immediately after soft reset causes bus error. */
258 mmiowb();
259 udelay(1);
260 while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout)
261 udelay(1);
262 /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
263 sio_set(up, TXX9_SIFCR,
264 TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1);
265 /* initial settings */
266 sio_out(up, TXX9_SILCR,
267 TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
268 ((up->port.flags & UPF_TXX9_USE_SCLK) ?
269 TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
270 sio_quot_set(up, uart_get_divisor(port, 9600));
271 sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
272 sio_out(up, TXX9_SIDICR, 0);
273 }
274
275 static inline void
276 receive_chars(struct uart_txx9_port *up, unsigned int *status)
277 {
278 struct tty_struct *tty = up->port.state->port.tty;
279 unsigned char ch;
280 unsigned int disr = *status;
281 int max_count = 256;
282 char flag;
283 unsigned int next_ignore_status_mask;
284
285 do {
286 ch = sio_in(up, TXX9_SIRFIFO);
287 flag = TTY_NORMAL;
288 up->port.icount.rx++;
289
290 /* mask out RFDN_MASK bit added by previous overrun */
291 next_ignore_status_mask =
292 up->port.ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK;
293 if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER |
294 TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) {
295 /*
296 * For statistics only
297 */
298 if (disr & TXX9_SIDISR_UBRK) {
299 disr &= ~(TXX9_SIDISR_UFER | TXX9_SIDISR_UPER);
300 up->port.icount.brk++;
301 /*
302 * We do the SysRQ and SAK checking
303 * here because otherwise the break
304 * may get masked by ignore_status_mask
305 * or read_status_mask.
306 */
307 if (uart_handle_break(&up->port))
308 goto ignore_char;
309 } else if (disr & TXX9_SIDISR_UPER)
310 up->port.icount.parity++;
311 else if (disr & TXX9_SIDISR_UFER)
312 up->port.icount.frame++;
313 if (disr & TXX9_SIDISR_UOER) {
314 up->port.icount.overrun++;
315 /*
316 * The receiver read buffer still hold
317 * a char which caused overrun.
318 * Ignore next char by adding RFDN_MASK
319 * to ignore_status_mask temporarily.
320 */
321 next_ignore_status_mask |=
322 TXX9_SIDISR_RFDN_MASK;
323 }
324
325 /*
326 * Mask off conditions which should be ingored.
327 */
328 disr &= up->port.read_status_mask;
329
330 if (disr & TXX9_SIDISR_UBRK) {
331 flag = TTY_BREAK;
332 } else if (disr & TXX9_SIDISR_UPER)
333 flag = TTY_PARITY;
334 else if (disr & TXX9_SIDISR_UFER)
335 flag = TTY_FRAME;
336 }
337 if (uart_handle_sysrq_char(&up->port, ch))
338 goto ignore_char;
339
340 uart_insert_char(&up->port, disr, TXX9_SIDISR_UOER, ch, flag);
341
342 ignore_char:
343 up->port.ignore_status_mask = next_ignore_status_mask;
344 disr = sio_in(up, TXX9_SIDISR);
345 } while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0));
346 spin_unlock(&up->port.lock);
347 tty_flip_buffer_push(tty);
348 spin_lock(&up->port.lock);
349 *status = disr;
350 }
351
352 static inline void transmit_chars(struct uart_txx9_port *up)
353 {
354 struct circ_buf *xmit = &up->port.state->xmit;
355 int count;
356
357 if (up->port.x_char) {
358 sio_out(up, TXX9_SITFIFO, up->port.x_char);
359 up->port.icount.tx++;
360 up->port.x_char = 0;
361 return;
362 }
363 if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
364 serial_txx9_stop_tx(&up->port);
365 return;
366 }
367
368 count = TXX9_SIO_TX_FIFO;
369 do {
370 sio_out(up, TXX9_SITFIFO, xmit->buf[xmit->tail]);
371 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
372 up->port.icount.tx++;
373 if (uart_circ_empty(xmit))
374 break;
375 } while (--count > 0);
376
377 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
378 uart_write_wakeup(&up->port);
379
380 if (uart_circ_empty(xmit))
381 serial_txx9_stop_tx(&up->port);
382 }
383
384 static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id)
385 {
386 int pass_counter = 0;
387 struct uart_txx9_port *up = dev_id;
388 unsigned int status;
389
390 while (1) {
391 spin_lock(&up->port.lock);
392 status = sio_in(up, TXX9_SIDISR);
393 if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE))
394 status &= ~TXX9_SIDISR_TDIS;
395 if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
396 TXX9_SIDISR_TOUT))) {
397 spin_unlock(&up->port.lock);
398 break;
399 }
400
401 if (status & TXX9_SIDISR_RDIS)
402 receive_chars(up, &status);
403 if (status & TXX9_SIDISR_TDIS)
404 transmit_chars(up);
405 /* Clear TX/RX Int. Status */
406 sio_mask(up, TXX9_SIDISR,
407 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
408 TXX9_SIDISR_TOUT);
409 spin_unlock(&up->port.lock);
410
411 if (pass_counter++ > PASS_LIMIT)
412 break;
413 }
414
415 return pass_counter ? IRQ_HANDLED : IRQ_NONE;
416 }
417
418 static unsigned int serial_txx9_tx_empty(struct uart_port *port)
419 {
420 struct uart_txx9_port *up = to_uart_txx9_port(port);
421 unsigned long flags;
422 unsigned int ret;
423
424 spin_lock_irqsave(&up->port.lock, flags);
425 ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0;
426 spin_unlock_irqrestore(&up->port.lock, flags);
427
428 return ret;
429 }
430
431 static unsigned int serial_txx9_get_mctrl(struct uart_port *port)
432 {
433 struct uart_txx9_port *up = to_uart_txx9_port(port);
434 unsigned int ret;
435
436 /* no modem control lines */
437 ret = TIOCM_CAR | TIOCM_DSR;
438 ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS;
439 ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS;
440
441 return ret;
442 }
443
444 static void serial_txx9_set_mctrl(struct uart_port *port, unsigned int mctrl)
445 {
446 struct uart_txx9_port *up = to_uart_txx9_port(port);
447
448 if (mctrl & TIOCM_RTS)
449 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
450 else
451 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
452 }
453
454 static void serial_txx9_break_ctl(struct uart_port *port, int break_state)
455 {
456 struct uart_txx9_port *up = to_uart_txx9_port(port);
457 unsigned long flags;
458
459 spin_lock_irqsave(&up->port.lock, flags);
460 if (break_state == -1)
461 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
462 else
463 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
464 spin_unlock_irqrestore(&up->port.lock, flags);
465 }
466
467 #if defined(CONFIG_SERIAL_TXX9_CONSOLE) || (CONFIG_CONSOLE_POLL)
468 /*
469 * Wait for transmitter & holding register to empty
470 */
471 static void wait_for_xmitr(struct uart_txx9_port *up)
472 {
473 unsigned int tmout = 10000;
474
475 /* Wait up to 10ms for the character(s) to be sent. */
476 while (--tmout &&
477 !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS))
478 udelay(1);
479
480 /* Wait up to 1s for flow control if necessary */
481 if (up->port.flags & UPF_CONS_FLOW) {
482 tmout = 1000000;
483 while (--tmout &&
484 (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS))
485 udelay(1);
486 }
487 }
488 #endif
489
490 #ifdef CONFIG_CONSOLE_POLL
491 /*
492 * Console polling routines for writing and reading from the uart while
493 * in an interrupt or debug context.
494 */
495
496 static int serial_txx9_get_poll_char(struct uart_port *port)
497 {
498 unsigned int ier;
499 unsigned char c;
500 struct uart_txx9_port *up = to_uart_txx9_port(port);
501
502 /*
503 * First save the IER then disable the interrupts
504 */
505 ier = sio_in(up, TXX9_SIDICR);
506 sio_out(up, TXX9_SIDICR, 0);
507
508 while (sio_in(up, TXX9_SIDISR) & TXX9_SIDISR_UVALID)
509 ;
510
511 c = sio_in(up, TXX9_SIRFIFO);
512
513 /*
514 * Finally, clear RX interrupt status
515 * and restore the IER
516 */
517 sio_mask(up, TXX9_SIDISR, TXX9_SIDISR_RDIS);
518 sio_out(up, TXX9_SIDICR, ier);
519 return c;
520 }
521
522
523 static void serial_txx9_put_poll_char(struct uart_port *port, unsigned char c)
524 {
525 unsigned int ier;
526 struct uart_txx9_port *up = to_uart_txx9_port(port);
527
528 /*
529 * First save the IER then disable the interrupts
530 */
531 ier = sio_in(up, TXX9_SIDICR);
532 sio_out(up, TXX9_SIDICR, 0);
533
534 wait_for_xmitr(up);
535 /*
536 * Send the character out.
537 * If a LF, also do CR...
538 */
539 sio_out(up, TXX9_SITFIFO, c);
540 if (c == 10) {
541 wait_for_xmitr(up);
542 sio_out(up, TXX9_SITFIFO, 13);
543 }
544
545 /*
546 * Finally, wait for transmitter to become empty
547 * and restore the IER
548 */
549 wait_for_xmitr(up);
550 sio_out(up, TXX9_SIDICR, ier);
551 }
552
553 #endif /* CONFIG_CONSOLE_POLL */
554
555 static int serial_txx9_startup(struct uart_port *port)
556 {
557 struct uart_txx9_port *up = to_uart_txx9_port(port);
558 unsigned long flags;
559 int retval;
560
561 /*
562 * Clear the FIFO buffers and disable them.
563 * (they will be reenabled in set_termios())
564 */
565 sio_set(up, TXX9_SIFCR,
566 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
567 /* clear reset */
568 sio_mask(up, TXX9_SIFCR,
569 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
570 sio_out(up, TXX9_SIDICR, 0);
571
572 /*
573 * Clear the interrupt registers.
574 */
575 sio_out(up, TXX9_SIDISR, 0);
576
577 retval = request_irq(up->port.irq, serial_txx9_interrupt,
578 IRQF_SHARED, "serial_txx9", up);
579 if (retval)
580 return retval;
581
582 /*
583 * Now, initialize the UART
584 */
585 spin_lock_irqsave(&up->port.lock, flags);
586 serial_txx9_set_mctrl(&up->port, up->port.mctrl);
587 spin_unlock_irqrestore(&up->port.lock, flags);
588
589 /* Enable RX/TX */
590 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
591
592 /*
593 * Finally, enable interrupts.
594 */
595 sio_set(up, TXX9_SIDICR, TXX9_SIDICR_RIE);
596
597 return 0;
598 }
599
600 static void serial_txx9_shutdown(struct uart_port *port)
601 {
602 struct uart_txx9_port *up = to_uart_txx9_port(port);
603 unsigned long flags;
604
605 /*
606 * Disable interrupts from this port
607 */
608 sio_out(up, TXX9_SIDICR, 0); /* disable all intrs */
609
610 spin_lock_irqsave(&up->port.lock, flags);
611 serial_txx9_set_mctrl(&up->port, up->port.mctrl);
612 spin_unlock_irqrestore(&up->port.lock, flags);
613
614 /*
615 * Disable break condition
616 */
617 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
618
619 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
620 if (up->port.cons && up->port.line == up->port.cons->index) {
621 free_irq(up->port.irq, up);
622 return;
623 }
624 #endif
625 /* reset FIFOs */
626 sio_set(up, TXX9_SIFCR,
627 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
628 /* clear reset */
629 sio_mask(up, TXX9_SIFCR,
630 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
631
632 /* Disable RX/TX */
633 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
634
635 free_irq(up->port.irq, up);
636 }
637
638 static void
639 serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios,
640 struct ktermios *old)
641 {
642 struct uart_txx9_port *up = to_uart_txx9_port(port);
643 unsigned int cval, fcr = 0;
644 unsigned long flags;
645 unsigned int baud, quot;
646
647 /*
648 * We don't support modem control lines.
649 */
650 termios->c_cflag &= ~(HUPCL | CMSPAR);
651 termios->c_cflag |= CLOCAL;
652
653 cval = sio_in(up, TXX9_SILCR);
654 /* byte size and parity */
655 cval &= ~TXX9_SILCR_UMODE_MASK;
656 switch (termios->c_cflag & CSIZE) {
657 case CS7:
658 cval |= TXX9_SILCR_UMODE_7BIT;
659 break;
660 default:
661 case CS5: /* not supported */
662 case CS6: /* not supported */
663 case CS8:
664 cval |= TXX9_SILCR_UMODE_8BIT;
665 break;
666 }
667
668 cval &= ~TXX9_SILCR_USBL_MASK;
669 if (termios->c_cflag & CSTOPB)
670 cval |= TXX9_SILCR_USBL_2BIT;
671 else
672 cval |= TXX9_SILCR_USBL_1BIT;
673 cval &= ~(TXX9_SILCR_UPEN | TXX9_SILCR_UEPS);
674 if (termios->c_cflag & PARENB)
675 cval |= TXX9_SILCR_UPEN;
676 if (!(termios->c_cflag & PARODD))
677 cval |= TXX9_SILCR_UEPS;
678
679 /*
680 * Ask the core to calculate the divisor for us.
681 */
682 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16/2);
683 quot = uart_get_divisor(port, baud);
684
685 /* Set up FIFOs */
686 /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
687 fcr = TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1;
688
689 /*
690 * Ok, we're now changing the port state. Do it with
691 * interrupts disabled.
692 */
693 spin_lock_irqsave(&up->port.lock, flags);
694
695 /*
696 * Update the per-port timeout.
697 */
698 uart_update_timeout(port, termios->c_cflag, baud);
699
700 up->port.read_status_mask = TXX9_SIDISR_UOER |
701 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS;
702 if (termios->c_iflag & INPCK)
703 up->port.read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER;
704 if (termios->c_iflag & (BRKINT | PARMRK))
705 up->port.read_status_mask |= TXX9_SIDISR_UBRK;
706
707 /*
708 * Characteres to ignore
709 */
710 up->port.ignore_status_mask = 0;
711 if (termios->c_iflag & IGNPAR)
712 up->port.ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER;
713 if (termios->c_iflag & IGNBRK) {
714 up->port.ignore_status_mask |= TXX9_SIDISR_UBRK;
715 /*
716 * If we're ignoring parity and break indicators,
717 * ignore overruns too (for real raw support).
718 */
719 if (termios->c_iflag & IGNPAR)
720 up->port.ignore_status_mask |= TXX9_SIDISR_UOER;
721 }
722
723 /*
724 * ignore all characters if CREAD is not set
725 */
726 if ((termios->c_cflag & CREAD) == 0)
727 up->port.ignore_status_mask |= TXX9_SIDISR_RDIS;
728
729 /* CTS flow control flag */
730 if ((termios->c_cflag & CRTSCTS) &&
731 (up->port.flags & UPF_TXX9_HAVE_CTS_LINE)) {
732 sio_set(up, TXX9_SIFLCR,
733 TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
734 } else {
735 sio_mask(up, TXX9_SIFLCR,
736 TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
737 }
738
739 sio_out(up, TXX9_SILCR, cval);
740 sio_quot_set(up, quot);
741 sio_out(up, TXX9_SIFCR, fcr);
742
743 serial_txx9_set_mctrl(&up->port, up->port.mctrl);
744 spin_unlock_irqrestore(&up->port.lock, flags);
745 }
746
747 static void
748 serial_txx9_pm(struct uart_port *port, unsigned int state,
749 unsigned int oldstate)
750 {
751 /*
752 * If oldstate was -1 this is called from
753 * uart_configure_port(). In this case do not initialize the
754 * port now, because the port was already initialized (for
755 * non-console port) or should not be initialized here (for
756 * console port). If we initialized the port here we lose
757 * serial console settings.
758 */
759 if (state == 0 && oldstate != -1)
760 serial_txx9_initialize(port);
761 }
762
763 static int serial_txx9_request_resource(struct uart_txx9_port *up)
764 {
765 unsigned int size = TXX9_REGION_SIZE;
766 int ret = 0;
767
768 switch (up->port.iotype) {
769 default:
770 if (!up->port.mapbase)
771 break;
772
773 if (!request_mem_region(up->port.mapbase, size, "serial_txx9")) {
774 ret = -EBUSY;
775 break;
776 }
777
778 if (up->port.flags & UPF_IOREMAP) {
779 up->port.membase = ioremap(up->port.mapbase, size);
780 if (!up->port.membase) {
781 release_mem_region(up->port.mapbase, size);
782 ret = -ENOMEM;
783 }
784 }
785 break;
786
787 case UPIO_PORT:
788 if (!request_region(up->port.iobase, size, "serial_txx9"))
789 ret = -EBUSY;
790 break;
791 }
792 return ret;
793 }
794
795 static void serial_txx9_release_resource(struct uart_txx9_port *up)
796 {
797 unsigned int size = TXX9_REGION_SIZE;
798
799 switch (up->port.iotype) {
800 default:
801 if (!up->port.mapbase)
802 break;
803
804 if (up->port.flags & UPF_IOREMAP) {
805 iounmap(up->port.membase);
806 up->port.membase = NULL;
807 }
808
809 release_mem_region(up->port.mapbase, size);
810 break;
811
812 case UPIO_PORT:
813 release_region(up->port.iobase, size);
814 break;
815 }
816 }
817
818 static void serial_txx9_release_port(struct uart_port *port)
819 {
820 struct uart_txx9_port *up = to_uart_txx9_port(port);
821 serial_txx9_release_resource(up);
822 }
823
824 static int serial_txx9_request_port(struct uart_port *port)
825 {
826 struct uart_txx9_port *up = to_uart_txx9_port(port);
827 return serial_txx9_request_resource(up);
828 }
829
830 static void serial_txx9_config_port(struct uart_port *port, int uflags)
831 {
832 struct uart_txx9_port *up = to_uart_txx9_port(port);
833 int ret;
834
835 /*
836 * Find the region that we can probe for. This in turn
837 * tells us whether we can probe for the type of port.
838 */
839 ret = serial_txx9_request_resource(up);
840 if (ret < 0)
841 return;
842 port->type = PORT_TXX9;
843 up->port.fifosize = TXX9_SIO_TX_FIFO;
844
845 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
846 if (up->port.line == up->port.cons->index)
847 return;
848 #endif
849 serial_txx9_initialize(port);
850 }
851
852 static const char *
853 serial_txx9_type(struct uart_port *port)
854 {
855 return "txx9";
856 }
857
858 static struct uart_ops serial_txx9_pops = {
859 .tx_empty = serial_txx9_tx_empty,
860 .set_mctrl = serial_txx9_set_mctrl,
861 .get_mctrl = serial_txx9_get_mctrl,
862 .stop_tx = serial_txx9_stop_tx,
863 .start_tx = serial_txx9_start_tx,
864 .stop_rx = serial_txx9_stop_rx,
865 .enable_ms = serial_txx9_enable_ms,
866 .break_ctl = serial_txx9_break_ctl,
867 .startup = serial_txx9_startup,
868 .shutdown = serial_txx9_shutdown,
869 .set_termios = serial_txx9_set_termios,
870 .pm = serial_txx9_pm,
871 .type = serial_txx9_type,
872 .release_port = serial_txx9_release_port,
873 .request_port = serial_txx9_request_port,
874 .config_port = serial_txx9_config_port,
875 #ifdef CONFIG_CONSOLE_POLL
876 .poll_get_char = serial_txx9_get_poll_char,
877 .poll_put_char = serial_txx9_put_poll_char,
878 #endif
879 };
880
881 static struct uart_txx9_port serial_txx9_ports[UART_NR];
882
883 static void __init serial_txx9_register_ports(struct uart_driver *drv,
884 struct device *dev)
885 {
886 int i;
887
888 for (i = 0; i < UART_NR; i++) {
889 struct uart_txx9_port *up = &serial_txx9_ports[i];
890
891 up->port.line = i;
892 up->port.ops = &serial_txx9_pops;
893 up->port.dev = dev;
894 if (up->port.iobase || up->port.mapbase)
895 uart_add_one_port(drv, &up->port);
896 }
897 }
898
899 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
900
901 static void serial_txx9_console_putchar(struct uart_port *port, int ch)
902 {
903 struct uart_txx9_port *up = to_uart_txx9_port(port);
904
905 wait_for_xmitr(up);
906 sio_out(up, TXX9_SITFIFO, ch);
907 }
908
909 /*
910 * Print a string to the serial port trying not to disturb
911 * any possible real use of the port...
912 *
913 * The console_lock must be held when we get here.
914 */
915 static void
916 serial_txx9_console_write(struct console *co, const char *s, unsigned int count)
917 {
918 struct uart_txx9_port *up = &serial_txx9_ports[co->index];
919 unsigned int ier, flcr;
920
921 /*
922 * First save the UER then disable the interrupts
923 */
924 ier = sio_in(up, TXX9_SIDICR);
925 sio_out(up, TXX9_SIDICR, 0);
926 /*
927 * Disable flow-control if enabled (and unnecessary)
928 */
929 flcr = sio_in(up, TXX9_SIFLCR);
930 if (!(up->port.flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES))
931 sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES);
932
933 uart_console_write(&up->port, s, count, serial_txx9_console_putchar);
934
935 /*
936 * Finally, wait for transmitter to become empty
937 * and restore the IER
938 */
939 wait_for_xmitr(up);
940 sio_out(up, TXX9_SIFLCR, flcr);
941 sio_out(up, TXX9_SIDICR, ier);
942 }
943
944 static int __init serial_txx9_console_setup(struct console *co, char *options)
945 {
946 struct uart_port *port;
947 struct uart_txx9_port *up;
948 int baud = 9600;
949 int bits = 8;
950 int parity = 'n';
951 int flow = 'n';
952
953 /*
954 * Check whether an invalid uart number has been specified, and
955 * if so, search for the first available port that does have
956 * console support.
957 */
958 if (co->index >= UART_NR)
959 co->index = 0;
960 up = &serial_txx9_ports[co->index];
961 port = &up->port;
962 if (!port->ops)
963 return -ENODEV;
964
965 serial_txx9_initialize(&up->port);
966
967 if (options)
968 uart_parse_options(options, &baud, &parity, &bits, &flow);
969
970 return uart_set_options(port, co, baud, parity, bits, flow);
971 }
972
973 static struct uart_driver serial_txx9_reg;
974 static struct console serial_txx9_console = {
975 .name = TXX9_TTY_NAME,
976 .write = serial_txx9_console_write,
977 .device = uart_console_device,
978 .setup = serial_txx9_console_setup,
979 .flags = CON_PRINTBUFFER,
980 .index = -1,
981 .data = &serial_txx9_reg,
982 };
983
984 static int __init serial_txx9_console_init(void)
985 {
986 register_console(&serial_txx9_console);
987 return 0;
988 }
989 console_initcall(serial_txx9_console_init);
990
991 #define SERIAL_TXX9_CONSOLE &serial_txx9_console
992 #else
993 #define SERIAL_TXX9_CONSOLE NULL
994 #endif
995
996 static struct uart_driver serial_txx9_reg = {
997 .owner = THIS_MODULE,
998 .driver_name = "serial_txx9",
999 .dev_name = TXX9_TTY_NAME,
1000 .major = TXX9_TTY_MAJOR,
1001 .minor = TXX9_TTY_MINOR_START,
1002 .nr = UART_NR,
1003 .cons = SERIAL_TXX9_CONSOLE,
1004 };
1005
1006 int __init early_serial_txx9_setup(struct uart_port *port)
1007 {
1008 if (port->line >= ARRAY_SIZE(serial_txx9_ports))
1009 return -ENODEV;
1010
1011 serial_txx9_ports[port->line].port = *port;
1012 serial_txx9_ports[port->line].port.ops = &serial_txx9_pops;
1013 serial_txx9_ports[port->line].port.flags |=
1014 UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
1015 return 0;
1016 }
1017
1018 static DEFINE_MUTEX(serial_txx9_mutex);
1019
1020 /**
1021 * serial_txx9_register_port - register a serial port
1022 * @port: serial port template
1023 *
1024 * Configure the serial port specified by the request.
1025 *
1026 * The port is then probed and if necessary the IRQ is autodetected
1027 * If this fails an error is returned.
1028 *
1029 * On success the port is ready to use and the line number is returned.
1030 */
1031 static int __devinit serial_txx9_register_port(struct uart_port *port)
1032 {
1033 int i;
1034 struct uart_txx9_port *uart;
1035 int ret = -ENOSPC;
1036
1037 mutex_lock(&serial_txx9_mutex);
1038 for (i = 0; i < UART_NR; i++) {
1039 uart = &serial_txx9_ports[i];
1040 if (uart_match_port(&uart->port, port)) {
1041 uart_remove_one_port(&serial_txx9_reg, &uart->port);
1042 break;
1043 }
1044 }
1045 if (i == UART_NR) {
1046 /* Find unused port */
1047 for (i = 0; i < UART_NR; i++) {
1048 uart = &serial_txx9_ports[i];
1049 if (!(uart->port.iobase || uart->port.mapbase))
1050 break;
1051 }
1052 }
1053 if (i < UART_NR) {
1054 uart->port.iobase = port->iobase;
1055 uart->port.membase = port->membase;
1056 uart->port.irq = port->irq;
1057 uart->port.uartclk = port->uartclk;
1058 uart->port.iotype = port->iotype;
1059 uart->port.flags = port->flags
1060 | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
1061 uart->port.mapbase = port->mapbase;
1062 if (port->dev)
1063 uart->port.dev = port->dev;
1064 ret = uart_add_one_port(&serial_txx9_reg, &uart->port);
1065 if (ret == 0)
1066 ret = uart->port.line;
1067 }
1068 mutex_unlock(&serial_txx9_mutex);
1069 return ret;
1070 }
1071
1072 /**
1073 * serial_txx9_unregister_port - remove a txx9 serial port at runtime
1074 * @line: serial line number
1075 *
1076 * Remove one serial port. This may not be called from interrupt
1077 * context. We hand the port back to the our control.
1078 */
1079 static void __devexit serial_txx9_unregister_port(int line)
1080 {
1081 struct uart_txx9_port *uart = &serial_txx9_ports[line];
1082
1083 mutex_lock(&serial_txx9_mutex);
1084 uart_remove_one_port(&serial_txx9_reg, &uart->port);
1085 uart->port.flags = 0;
1086 uart->port.type = PORT_UNKNOWN;
1087 uart->port.iobase = 0;
1088 uart->port.mapbase = 0;
1089 uart->port.membase = NULL;
1090 uart->port.dev = NULL;
1091 mutex_unlock(&serial_txx9_mutex);
1092 }
1093
1094 /*
1095 * Register a set of serial devices attached to a platform device.
1096 */
1097 static int __devinit serial_txx9_probe(struct platform_device *dev)
1098 {
1099 struct uart_port *p = dev->dev.platform_data;
1100 struct uart_port port;
1101 int ret, i;
1102
1103 memset(&port, 0, sizeof(struct uart_port));
1104 for (i = 0; p && p->uartclk != 0; p++, i++) {
1105 port.iobase = p->iobase;
1106 port.membase = p->membase;
1107 port.irq = p->irq;
1108 port.uartclk = p->uartclk;
1109 port.iotype = p->iotype;
1110 port.flags = p->flags;
1111 port.mapbase = p->mapbase;
1112 port.dev = &dev->dev;
1113 ret = serial_txx9_register_port(&port);
1114 if (ret < 0) {
1115 dev_err(&dev->dev, "unable to register port at index %d "
1116 "(IO%lx MEM%llx IRQ%d): %d\n", i,
1117 p->iobase, (unsigned long long)p->mapbase,
1118 p->irq, ret);
1119 }
1120 }
1121 return 0;
1122 }
1123
1124 /*
1125 * Remove serial ports registered against a platform device.
1126 */
1127 static int __devexit serial_txx9_remove(struct platform_device *dev)
1128 {
1129 int i;
1130
1131 for (i = 0; i < UART_NR; i++) {
1132 struct uart_txx9_port *up = &serial_txx9_ports[i];
1133
1134 if (up->port.dev == &dev->dev)
1135 serial_txx9_unregister_port(i);
1136 }
1137 return 0;
1138 }
1139
1140 #ifdef CONFIG_PM
1141 static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state)
1142 {
1143 int i;
1144
1145 for (i = 0; i < UART_NR; i++) {
1146 struct uart_txx9_port *up = &serial_txx9_ports[i];
1147
1148 if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
1149 uart_suspend_port(&serial_txx9_reg, &up->port);
1150 }
1151
1152 return 0;
1153 }
1154
1155 static int serial_txx9_resume(struct platform_device *dev)
1156 {
1157 int i;
1158
1159 for (i = 0; i < UART_NR; i++) {
1160 struct uart_txx9_port *up = &serial_txx9_ports[i];
1161
1162 if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
1163 uart_resume_port(&serial_txx9_reg, &up->port);
1164 }
1165
1166 return 0;
1167 }
1168 #endif
1169
1170 static struct platform_driver serial_txx9_plat_driver = {
1171 .probe = serial_txx9_probe,
1172 .remove = __devexit_p(serial_txx9_remove),
1173 #ifdef CONFIG_PM
1174 .suspend = serial_txx9_suspend,
1175 .resume = serial_txx9_resume,
1176 #endif
1177 .driver = {
1178 .name = "serial_txx9",
1179 .owner = THIS_MODULE,
1180 },
1181 };
1182
1183 #ifdef ENABLE_SERIAL_TXX9_PCI
1184 /*
1185 * Probe one serial board. Unfortunately, there is no rhyme nor reason
1186 * to the arrangement of serial ports on a PCI card.
1187 */
1188 static int __devinit
1189 pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
1190 {
1191 struct uart_port port;
1192 int line;
1193 int rc;
1194
1195 rc = pci_enable_device(dev);
1196 if (rc)
1197 return rc;
1198
1199 memset(&port, 0, sizeof(port));
1200 port.ops = &serial_txx9_pops;
1201 port.flags |= UPF_TXX9_HAVE_CTS_LINE;
1202 port.uartclk = 66670000;
1203 port.irq = dev->irq;
1204 port.iotype = UPIO_PORT;
1205 port.iobase = pci_resource_start(dev, 1);
1206 port.dev = &dev->dev;
1207 line = serial_txx9_register_port(&port);
1208 if (line < 0) {
1209 printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line);
1210 pci_disable_device(dev);
1211 return line;
1212 }
1213 pci_set_drvdata(dev, &serial_txx9_ports[line]);
1214
1215 return 0;
1216 }
1217
1218 static void __devexit pciserial_txx9_remove_one(struct pci_dev *dev)
1219 {
1220 struct uart_txx9_port *up = pci_get_drvdata(dev);
1221
1222 pci_set_drvdata(dev, NULL);
1223
1224 if (up) {
1225 serial_txx9_unregister_port(up->port.line);
1226 pci_disable_device(dev);
1227 }
1228 }
1229
1230 #ifdef CONFIG_PM
1231 static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)
1232 {
1233 struct uart_txx9_port *up = pci_get_drvdata(dev);
1234
1235 if (up)
1236 uart_suspend_port(&serial_txx9_reg, &up->port);
1237 pci_save_state(dev);
1238 pci_set_power_state(dev, pci_choose_state(dev, state));
1239 return 0;
1240 }
1241
1242 static int pciserial_txx9_resume_one(struct pci_dev *dev)
1243 {
1244 struct uart_txx9_port *up = pci_get_drvdata(dev);
1245
1246 pci_set_power_state(dev, PCI_D0);
1247 pci_restore_state(dev);
1248 if (up)
1249 uart_resume_port(&serial_txx9_reg, &up->port);
1250 return 0;
1251 }
1252 #endif
1253
1254 static const struct pci_device_id serial_txx9_pci_tbl[] = {
1255 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC) },
1256 { 0, }
1257 };
1258
1259 static struct pci_driver serial_txx9_pci_driver = {
1260 .name = "serial_txx9",
1261 .probe = pciserial_txx9_init_one,
1262 .remove = __devexit_p(pciserial_txx9_remove_one),
1263 #ifdef CONFIG_PM
1264 .suspend = pciserial_txx9_suspend_one,
1265 .resume = pciserial_txx9_resume_one,
1266 #endif
1267 .id_table = serial_txx9_pci_tbl,
1268 };
1269
1270 MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl);
1271 #endif /* ENABLE_SERIAL_TXX9_PCI */
1272
1273 static struct platform_device *serial_txx9_plat_devs;
1274
1275 static int __init serial_txx9_init(void)
1276 {
1277 int ret;
1278
1279 printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
1280
1281 ret = uart_register_driver(&serial_txx9_reg);
1282 if (ret)
1283 goto out;
1284
1285 serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1);
1286 if (!serial_txx9_plat_devs) {
1287 ret = -ENOMEM;
1288 goto unreg_uart_drv;
1289 }
1290
1291 ret = platform_device_add(serial_txx9_plat_devs);
1292 if (ret)
1293 goto put_dev;
1294
1295 serial_txx9_register_ports(&serial_txx9_reg,
1296 &serial_txx9_plat_devs->dev);
1297
1298 ret = platform_driver_register(&serial_txx9_plat_driver);
1299 if (ret)
1300 goto del_dev;
1301
1302 #ifdef ENABLE_SERIAL_TXX9_PCI
1303 ret = pci_register_driver(&serial_txx9_pci_driver);
1304 #endif
1305 if (ret == 0)
1306 goto out;
1307
1308 del_dev:
1309 platform_device_del(serial_txx9_plat_devs);
1310 put_dev:
1311 platform_device_put(serial_txx9_plat_devs);
1312 unreg_uart_drv:
1313 uart_unregister_driver(&serial_txx9_reg);
1314 out:
1315 return ret;
1316 }
1317
1318 static void __exit serial_txx9_exit(void)
1319 {
1320 int i;
1321
1322 #ifdef ENABLE_SERIAL_TXX9_PCI
1323 pci_unregister_driver(&serial_txx9_pci_driver);
1324 #endif
1325 platform_driver_unregister(&serial_txx9_plat_driver);
1326 platform_device_unregister(serial_txx9_plat_devs);
1327 for (i = 0; i < UART_NR; i++) {
1328 struct uart_txx9_port *up = &serial_txx9_ports[i];
1329 if (up->port.iobase || up->port.mapbase)
1330 uart_remove_one_port(&serial_txx9_reg, &up->port);
1331 }
1332
1333 uart_unregister_driver(&serial_txx9_reg);
1334 }
1335
1336 module_init(serial_txx9_init);
1337 module_exit(serial_txx9_exit);
1338
1339 MODULE_LICENSE("GPL");
1340 MODULE_DESCRIPTION("TX39/49 serial driver");
1341
1342 MODULE_ALIAS_CHARDEV_MAJOR(TXX9_TTY_MAJOR);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree