1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Derived from many drivers using generic_serial interface,
4 * especially serial_tx3912.c by Steven J. Hill and r39xx_serial.c
5 * (was in Linux/VR tree) by Jim Pick.
6 *
7 * Copyright (C) 1999 Harald Koerfgen
8 * Copyright (C) 2000 Jim Pick <jim@jimpick.com>
9 * Copyright (C) 2001 Steven J. Hill (sjhill@realitydiluted.com)
10 * Copyright (C) 2000-2002 Toshiba Corporation
11 *
12 * Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller
13 */
14
15 #include <linux/module.h>
16 #include <linux/ioport.h>
17 #include <linux/init.h>
18 #include <linux/console.h>
19 #include <linux/delay.h>
20 #include <linux/platform_device.h>
21 #include <linux/pci.h>
22 #include <linux/serial_core.h>
23 #include <linux/serial.h>
24 #include <linux/tty.h>
25 #include <linux/tty_flip.h>
26
27 #include <linux/io.h>
28
29 #define PASS_LIMIT 256
30
31 #if !defined(CONFIG_SERIAL_TXX9_STDSERIAL)
32 /* "ttyS" is used for standard serial driver */
33 #define TXX9_TTY_NAME "ttyTX"
34 #define TXX9_TTY_MINOR_START 196
35 #define TXX9_TTY_MAJOR 204
36 #else
37 /* acts like standard serial driver */
38 #define TXX9_TTY_NAME "ttyS"
39 #define TXX9_TTY_MINOR_START 64
40 #define TXX9_TTY_MAJOR TTY_MAJOR
41 #endif
42
43 /* flag aliases */
44 #define UPF_TXX9_HAVE_CTS_LINE UPF_BUGGY_UART
45 #define UPF_TXX9_USE_SCLK UPF_MAGIC_MULTIPLIER
46
47 #ifdef CONFIG_PCI
48 /* support for Toshiba TC86C001 SIO */
49 #define ENABLE_SERIAL_TXX9_PCI
50 #endif
51
52 /*
53 * Number of serial ports
54 */
55 #define UART_NR CONFIG_SERIAL_TXX9_NR_UARTS
56
57 #define TXX9_REGION_SIZE 0x24
58
59 /* TXX9 Serial Registers */
60 #define TXX9_SILCR 0x00
61 #define TXX9_SIDICR 0x04
62 #define TXX9_SIDISR 0x08
63 #define TXX9_SICISR 0x0c
64 #define TXX9_SIFCR 0x10
65 #define TXX9_SIFLCR 0x14
66 #define TXX9_SIBGR 0x18
67 #define TXX9_SITFIFO 0x1c
68 #define TXX9_SIRFIFO 0x20
69
70 /* SILCR : Line Control */
71 #define TXX9_SILCR_SCS_MASK 0x00000060
72 #define TXX9_SILCR_SCS_IMCLK 0x00000000
73 #define TXX9_SILCR_SCS_IMCLK_BG 0x00000020
74 #define TXX9_SILCR_SCS_SCLK 0x00000040
75 #define TXX9_SILCR_SCS_SCLK_BG 0x00000060
76 #define TXX9_SILCR_UEPS 0x00000010
77 #define TXX9_SILCR_UPEN 0x00000008
78 #define TXX9_SILCR_USBL_MASK 0x00000004
79 #define TXX9_SILCR_USBL_1BIT 0x00000000
80 #define TXX9_SILCR_USBL_2BIT 0x00000004
81 #define TXX9_SILCR_UMODE_MASK 0x00000003
82 #define TXX9_SILCR_UMODE_8BIT 0x00000000
83 #define TXX9_SILCR_UMODE_7BIT 0x00000001
84
85 /* SIDICR : DMA/Int. Control */
86 #define TXX9_SIDICR_TDE 0x00008000
87 #define TXX9_SIDICR_RDE 0x00004000
88 #define TXX9_SIDICR_TIE 0x00002000
89 #define TXX9_SIDICR_RIE 0x00001000
90 #define TXX9_SIDICR_SPIE 0x00000800
91 #define TXX9_SIDICR_CTSAC 0x00000600
92 #define TXX9_SIDICR_STIE_MASK 0x0000003f
93 #define TXX9_SIDICR_STIE_OERS 0x00000020
94 #define TXX9_SIDICR_STIE_CTSS 0x00000010
95 #define TXX9_SIDICR_STIE_RBRKD 0x00000008
96 #define TXX9_SIDICR_STIE_TRDY 0x00000004
97 #define TXX9_SIDICR_STIE_TXALS 0x00000002
98 #define TXX9_SIDICR_STIE_UBRKD 0x00000001
99
100 /* SIDISR : DMA/Int. Status */
101 #define TXX9_SIDISR_UBRK 0x00008000
102 #define TXX9_SIDISR_UVALID 0x00004000
103 #define TXX9_SIDISR_UFER 0x00002000
104 #define TXX9_SIDISR_UPER 0x00001000
105 #define TXX9_SIDISR_UOER 0x00000800
106 #define TXX9_SIDISR_ERI 0x00000400
107 #define TXX9_SIDISR_TOUT 0x00000200
108 #define TXX9_SIDISR_TDIS 0x00000100
109 #define TXX9_SIDISR_RDIS 0x00000080
110 #define TXX9_SIDISR_STIS 0x00000040
111 #define TXX9_SIDISR_RFDN_MASK 0x0000001f
112
113 /* SICISR : Change Int. Status */
114 #define TXX9_SICISR_OERS 0x00000020
115 #define TXX9_SICISR_CTSS 0x00000010
116 #define TXX9_SICISR_RBRKD 0x00000008
117 #define TXX9_SICISR_TRDY 0x00000004
118 #define TXX9_SICISR_TXALS 0x00000002
119 #define TXX9_SICISR_UBRKD 0x00000001
120
121 /* SIFCR : FIFO Control */
122 #define TXX9_SIFCR_SWRST 0x00008000
123 #define TXX9_SIFCR_RDIL_MASK 0x00000180
124 #define TXX9_SIFCR_RDIL_1 0x00000000
125 #define TXX9_SIFCR_RDIL_4 0x00000080
126 #define TXX9_SIFCR_RDIL_8 0x00000100
127 #define TXX9_SIFCR_RDIL_12 0x00000180
128 #define TXX9_SIFCR_RDIL_MAX 0x00000180
129 #define TXX9_SIFCR_TDIL_MASK 0x00000018
130 #define TXX9_SIFCR_TDIL_1 0x00000000
131 #define TXX9_SIFCR_TDIL_4 0x00000001
132 #define TXX9_SIFCR_TDIL_8 0x00000010
133 #define TXX9_SIFCR_TDIL_MAX 0x00000010
134 #define TXX9_SIFCR_TFRST 0x00000004
135 #define TXX9_SIFCR_RFRST 0x00000002
136 #define TXX9_SIFCR_FRSTE 0x00000001
137 #define TXX9_SIO_TX_FIFO 8
138 #define TXX9_SIO_RX_FIFO 16
139
140 /* SIFLCR : Flow Control */
141 #define TXX9_SIFLCR_RCS 0x00001000
142 #define TXX9_SIFLCR_TES 0x00000800
143 #define TXX9_SIFLCR_RTSSC 0x00000200
144 #define TXX9_SIFLCR_RSDE 0x00000100
145 #define TXX9_SIFLCR_TSDE 0x00000080
146 #define TXX9_SIFLCR_RTSTL_MASK 0x0000001e
147 #define TXX9_SIFLCR_RTSTL_MAX 0x0000001e
148 #define TXX9_SIFLCR_TBRK 0x00000001
149
150 /* SIBGR : Baudrate Control */
151 #define TXX9_SIBGR_BCLK_MASK 0x00000300
152 #define TXX9_SIBGR_BCLK_T0 0x00000000
153 #define TXX9_SIBGR_BCLK_T2 0x00000100
154 #define TXX9_SIBGR_BCLK_T4 0x00000200
155 #define TXX9_SIBGR_BCLK_T6 0x00000300
156 #define TXX9_SIBGR_BRD_MASK 0x000000ff
157
sio_in(struct uart_port * up,int offset)158 static inline unsigned int sio_in(struct uart_port *up, int offset)
159 {
160 switch (up->iotype) {
161 default:
162 return __raw_readl(up->membase + offset);
163 case UPIO_PORT:
164 return inl(up->iobase + offset);
165 }
166 }
167
168 static inline void
sio_out(struct uart_port * up,int offset,int value)169 sio_out(struct uart_port *up, int offset, int value)
170 {
171 switch (up->iotype) {
172 default:
173 __raw_writel(value, up->membase + offset);
174 break;
175 case UPIO_PORT:
176 outl(value, up->iobase + offset);
177 break;
178 }
179 }
180
181 static inline void
sio_mask(struct uart_port * up,int offset,unsigned int value)182 sio_mask(struct uart_port *up, int offset, unsigned int value)
183 {
184 sio_out(up, offset, sio_in(up, offset) & ~value);
185 }
186 static inline void
sio_set(struct uart_port * up,int offset,unsigned int value)187 sio_set(struct uart_port *up, int offset, unsigned int value)
188 {
189 sio_out(up, offset, sio_in(up, offset) | value);
190 }
191
192 static inline void
sio_quot_set(struct uart_port * up,int quot)193 sio_quot_set(struct uart_port *up, int quot)
194 {
195 quot >>= 1;
196 if (quot < 256)
197 sio_out(up, TXX9_SIBGR, quot | TXX9_SIBGR_BCLK_T0);
198 else if (quot < (256 << 2))
199 sio_out(up, TXX9_SIBGR, (quot >> 2) | TXX9_SIBGR_BCLK_T2);
200 else if (quot < (256 << 4))
201 sio_out(up, TXX9_SIBGR, (quot >> 4) | TXX9_SIBGR_BCLK_T4);
202 else if (quot < (256 << 6))
203 sio_out(up, TXX9_SIBGR, (quot >> 6) | TXX9_SIBGR_BCLK_T6);
204 else
205 sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6);
206 }
207
serial_txx9_stop_tx(struct uart_port * up)208 static void serial_txx9_stop_tx(struct uart_port *up)
209 {
210 sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
211 }
212
serial_txx9_start_tx(struct uart_port * up)213 static void serial_txx9_start_tx(struct uart_port *up)
214 {
215 sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
216 }
217
serial_txx9_stop_rx(struct uart_port * up)218 static void serial_txx9_stop_rx(struct uart_port *up)
219 {
220 up->read_status_mask &= ~TXX9_SIDISR_RDIS;
221 }
222
serial_txx9_initialize(struct uart_port * up)223 static void serial_txx9_initialize(struct uart_port *up)
224 {
225 unsigned int tmout = 10000;
226
227 sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST);
228 /* TX4925 BUG WORKAROUND. Accessing SIOC register
229 * immediately after soft reset causes bus error. */
230 udelay(1);
231 while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout)
232 udelay(1);
233 /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
234 sio_set(up, TXX9_SIFCR,
235 TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1);
236 /* initial settings */
237 sio_out(up, TXX9_SILCR,
238 TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
239 ((up->flags & UPF_TXX9_USE_SCLK) ?
240 TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
241 sio_quot_set(up, uart_get_divisor(up, 9600));
242 sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
243 sio_out(up, TXX9_SIDICR, 0);
244 }
245
246 static inline void
receive_chars(struct uart_port * up,unsigned int * status)247 receive_chars(struct uart_port *up, unsigned int *status)
248 {
249 unsigned int disr = *status;
250 int max_count = 256;
251 unsigned int next_ignore_status_mask;
252 u8 ch, flag;
253
254 do {
255 ch = sio_in(up, TXX9_SIRFIFO);
256 flag = TTY_NORMAL;
257 up->icount.rx++;
258
259 /* mask out RFDN_MASK bit added by previous overrun */
260 next_ignore_status_mask =
261 up->ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK;
262 if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER |
263 TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) {
264 /*
265 * For statistics only
266 */
267 if (disr & TXX9_SIDISR_UBRK) {
268 disr &= ~(TXX9_SIDISR_UFER | TXX9_SIDISR_UPER);
269 up->icount.brk++;
270 /*
271 * We do the SysRQ and SAK checking
272 * here because otherwise the break
273 * may get masked by ignore_status_mask
274 * or read_status_mask.
275 */
276 if (uart_handle_break(up))
277 goto ignore_char;
278 } else if (disr & TXX9_SIDISR_UPER)
279 up->icount.parity++;
280 else if (disr & TXX9_SIDISR_UFER)
281 up->icount.frame++;
282 if (disr & TXX9_SIDISR_UOER) {
283 up->icount.overrun++;
284 /*
285 * The receiver read buffer still hold
286 * a char which caused overrun.
287 * Ignore next char by adding RFDN_MASK
288 * to ignore_status_mask temporarily.
289 */
290 next_ignore_status_mask |=
291 TXX9_SIDISR_RFDN_MASK;
292 }
293
294 /*
295 * Mask off conditions which should be ingored.
296 */
297 disr &= up->read_status_mask;
298
299 if (disr & TXX9_SIDISR_UBRK) {
300 flag = TTY_BREAK;
301 } else if (disr & TXX9_SIDISR_UPER)
302 flag = TTY_PARITY;
303 else if (disr & TXX9_SIDISR_UFER)
304 flag = TTY_FRAME;
305 }
306 if (uart_handle_sysrq_char(up, ch))
307 goto ignore_char;
308
309 uart_insert_char(up, disr, TXX9_SIDISR_UOER, ch, flag);
310
311 ignore_char:
312 up->ignore_status_mask = next_ignore_status_mask;
313 disr = sio_in(up, TXX9_SIDISR);
314 } while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0));
315
316 tty_flip_buffer_push(&up->state->port);
317
318 *status = disr;
319 }
320
transmit_chars(struct uart_port * up)321 static inline void transmit_chars(struct uart_port *up)
322 {
323 u8 ch;
324
325 uart_port_tx_limited(up, ch, TXX9_SIO_TX_FIFO,
326 true,
327 sio_out(up, TXX9_SITFIFO, ch),
328 ({}));
329 }
330
serial_txx9_interrupt(int irq,void * dev_id)331 static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id)
332 {
333 int pass_counter = 0;
334 struct uart_port *up = dev_id;
335 unsigned int status;
336
337 while (1) {
338 spin_lock(&up->lock);
339 status = sio_in(up, TXX9_SIDISR);
340 if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE))
341 status &= ~TXX9_SIDISR_TDIS;
342 if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
343 TXX9_SIDISR_TOUT))) {
344 spin_unlock(&up->lock);
345 break;
346 }
347
348 if (status & TXX9_SIDISR_RDIS)
349 receive_chars(up, &status);
350 if (status & TXX9_SIDISR_TDIS)
351 transmit_chars(up);
352 /* Clear TX/RX Int. Status */
353 sio_mask(up, TXX9_SIDISR,
354 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
355 TXX9_SIDISR_TOUT);
356 spin_unlock(&up->lock);
357
358 if (pass_counter++ > PASS_LIMIT)
359 break;
360 }
361
362 return pass_counter ? IRQ_HANDLED : IRQ_NONE;
363 }
364
serial_txx9_tx_empty(struct uart_port * up)365 static unsigned int serial_txx9_tx_empty(struct uart_port *up)
366 {
367 unsigned long flags;
368 unsigned int ret;
369
370 spin_lock_irqsave(&up->lock, flags);
371 ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0;
372 spin_unlock_irqrestore(&up->lock, flags);
373
374 return ret;
375 }
376
serial_txx9_get_mctrl(struct uart_port * up)377 static unsigned int serial_txx9_get_mctrl(struct uart_port *up)
378 {
379 unsigned int ret;
380
381 /* no modem control lines */
382 ret = TIOCM_CAR | TIOCM_DSR;
383 ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS;
384 ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS;
385
386 return ret;
387 }
388
serial_txx9_set_mctrl(struct uart_port * up,unsigned int mctrl)389 static void serial_txx9_set_mctrl(struct uart_port *up, unsigned int mctrl)
390 {
391
392 if (mctrl & TIOCM_RTS)
393 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
394 else
395 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
396 }
397
serial_txx9_break_ctl(struct uart_port * up,int break_state)398 static void serial_txx9_break_ctl(struct uart_port *up, int break_state)
399 {
400 unsigned long flags;
401
402 spin_lock_irqsave(&up->lock, flags);
403 if (break_state == -1)
404 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
405 else
406 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
407 spin_unlock_irqrestore(&up->lock, flags);
408 }
409
410 #if defined(CONFIG_SERIAL_TXX9_CONSOLE) || defined(CONFIG_CONSOLE_POLL)
411 /*
412 * Wait for transmitter & holding register to empty
413 */
wait_for_xmitr(struct uart_port * up)414 static void wait_for_xmitr(struct uart_port *up)
415 {
416 unsigned int tmout = 10000;
417
418 /* Wait up to 10ms for the character(s) to be sent. */
419 while (--tmout &&
420 !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS))
421 udelay(1);
422
423 /* Wait up to 1s for flow control if necessary */
424 if (up->flags & UPF_CONS_FLOW) {
425 tmout = 1000000;
426 while (--tmout &&
427 (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS))
428 udelay(1);
429 }
430 }
431 #endif
432
433 #ifdef CONFIG_CONSOLE_POLL
434 /*
435 * Console polling routines for writing and reading from the uart while
436 * in an interrupt or debug context.
437 */
438
serial_txx9_get_poll_char(struct uart_port * up)439 static int serial_txx9_get_poll_char(struct uart_port *up)
440 {
441 unsigned int ier;
442 unsigned char c;
443
444 /*
445 * First save the IER then disable the interrupts
446 */
447 ier = sio_in(up, TXX9_SIDICR);
448 sio_out(up, TXX9_SIDICR, 0);
449
450 while (sio_in(up, TXX9_SIDISR) & TXX9_SIDISR_UVALID)
451 ;
452
453 c = sio_in(up, TXX9_SIRFIFO);
454
455 /*
456 * Finally, clear RX interrupt status
457 * and restore the IER
458 */
459 sio_mask(up, TXX9_SIDISR, TXX9_SIDISR_RDIS);
460 sio_out(up, TXX9_SIDICR, ier);
461 return c;
462 }
463
464
serial_txx9_put_poll_char(struct uart_port * up,unsigned char c)465 static void serial_txx9_put_poll_char(struct uart_port *up, unsigned char c)
466 {
467 unsigned int ier;
468
469 /*
470 * First save the IER then disable the interrupts
471 */
472 ier = sio_in(up, TXX9_SIDICR);
473 sio_out(up, TXX9_SIDICR, 0);
474
475 wait_for_xmitr(up);
476 /*
477 * Send the character out.
478 */
479 sio_out(up, TXX9_SITFIFO, c);
480
481 /*
482 * Finally, wait for transmitter to become empty
483 * and restore the IER
484 */
485 wait_for_xmitr(up);
486 sio_out(up, TXX9_SIDICR, ier);
487 }
488
489 #endif /* CONFIG_CONSOLE_POLL */
490
serial_txx9_startup(struct uart_port * up)491 static int serial_txx9_startup(struct uart_port *up)
492 {
493 unsigned long flags;
494 int retval;
495
496 /*
497 * Clear the FIFO buffers and disable them.
498 * (they will be reenabled in set_termios())
499 */
500 sio_set(up, TXX9_SIFCR,
501 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
502 /* clear reset */
503 sio_mask(up, TXX9_SIFCR,
504 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
505 sio_out(up, TXX9_SIDICR, 0);
506
507 /*
508 * Clear the interrupt registers.
509 */
510 sio_out(up, TXX9_SIDISR, 0);
511
512 retval = request_irq(up->irq, serial_txx9_interrupt,
513 IRQF_SHARED, "serial_txx9", up);
514 if (retval)
515 return retval;
516
517 /*
518 * Now, initialize the UART
519 */
520 spin_lock_irqsave(&up->lock, flags);
521 serial_txx9_set_mctrl(up, up->mctrl);
522 spin_unlock_irqrestore(&up->lock, flags);
523
524 /* Enable RX/TX */
525 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
526
527 /*
528 * Finally, enable interrupts.
529 */
530 sio_set(up, TXX9_SIDICR, TXX9_SIDICR_RIE);
531
532 return 0;
533 }
534
serial_txx9_shutdown(struct uart_port * up)535 static void serial_txx9_shutdown(struct uart_port *up)
536 {
537 unsigned long flags;
538
539 /*
540 * Disable interrupts from this port
541 */
542 sio_out(up, TXX9_SIDICR, 0); /* disable all intrs */
543
544 spin_lock_irqsave(&up->lock, flags);
545 serial_txx9_set_mctrl(up, up->mctrl);
546 spin_unlock_irqrestore(&up->lock, flags);
547
548 /*
549 * Disable break condition
550 */
551 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
552
553 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
554 if (up->cons && up->line == up->cons->index) {
555 free_irq(up->irq, up);
556 return;
557 }
558 #endif
559 /* reset FIFOs */
560 sio_set(up, TXX9_SIFCR,
561 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
562 /* clear reset */
563 sio_mask(up, TXX9_SIFCR,
564 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
565
566 /* Disable RX/TX */
567 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
568
569 free_irq(up->irq, up);
570 }
571
572 static void
serial_txx9_set_termios(struct uart_port * up,struct ktermios * termios,const struct ktermios * old)573 serial_txx9_set_termios(struct uart_port *up, struct ktermios *termios,
574 const struct ktermios *old)
575 {
576 unsigned int cval, fcr = 0;
577 unsigned long flags;
578 unsigned int baud, quot;
579
580 /*
581 * We don't support modem control lines.
582 */
583 termios->c_cflag &= ~(HUPCL | CMSPAR);
584 termios->c_cflag |= CLOCAL;
585
586 cval = sio_in(up, TXX9_SILCR);
587 /* byte size and parity */
588 cval &= ~TXX9_SILCR_UMODE_MASK;
589 switch (termios->c_cflag & CSIZE) {
590 case CS7:
591 cval |= TXX9_SILCR_UMODE_7BIT;
592 break;
593 default:
594 case CS5: /* not supported */
595 case CS6: /* not supported */
596 case CS8:
597 cval |= TXX9_SILCR_UMODE_8BIT;
598 termios->c_cflag &= ~CSIZE;
599 termios->c_cflag |= CS8;
600 break;
601 }
602
603 cval &= ~TXX9_SILCR_USBL_MASK;
604 if (termios->c_cflag & CSTOPB)
605 cval |= TXX9_SILCR_USBL_2BIT;
606 else
607 cval |= TXX9_SILCR_USBL_1BIT;
608 cval &= ~(TXX9_SILCR_UPEN | TXX9_SILCR_UEPS);
609 if (termios->c_cflag & PARENB)
610 cval |= TXX9_SILCR_UPEN;
611 if (!(termios->c_cflag & PARODD))
612 cval |= TXX9_SILCR_UEPS;
613
614 /*
615 * Ask the core to calculate the divisor for us.
616 */
617 baud = uart_get_baud_rate(up, termios, old, 0, up->uartclk/16/2);
618 quot = uart_get_divisor(up, baud);
619
620 /* Set up FIFOs */
621 /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
622 fcr = TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1;
623
624 /*
625 * Ok, we're now changing the port state. Do it with
626 * interrupts disabled.
627 */
628 spin_lock_irqsave(&up->lock, flags);
629
630 /*
631 * Update the per-port timeout.
632 */
633 uart_update_timeout(up, termios->c_cflag, baud);
634
635 up->read_status_mask = TXX9_SIDISR_UOER |
636 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS;
637 if (termios->c_iflag & INPCK)
638 up->read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER;
639 if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK))
640 up->read_status_mask |= TXX9_SIDISR_UBRK;
641
642 /*
643 * Characteres to ignore
644 */
645 up->ignore_status_mask = 0;
646 if (termios->c_iflag & IGNPAR)
647 up->ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER;
648 if (termios->c_iflag & IGNBRK) {
649 up->ignore_status_mask |= TXX9_SIDISR_UBRK;
650 /*
651 * If we're ignoring parity and break indicators,
652 * ignore overruns too (for real raw support).
653 */
654 if (termios->c_iflag & IGNPAR)
655 up->ignore_status_mask |= TXX9_SIDISR_UOER;
656 }
657
658 /*
659 * ignore all characters if CREAD is not set
660 */
661 if ((termios->c_cflag & CREAD) == 0)
662 up->ignore_status_mask |= TXX9_SIDISR_RDIS;
663
664 /* CTS flow control flag */
665 if ((termios->c_cflag & CRTSCTS) &&
666 (up->flags & UPF_TXX9_HAVE_CTS_LINE)) {
667 sio_set(up, TXX9_SIFLCR,
668 TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
669 } else {
670 sio_mask(up, TXX9_SIFLCR,
671 TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
672 }
673
674 sio_out(up, TXX9_SILCR, cval);
675 sio_quot_set(up, quot);
676 sio_out(up, TXX9_SIFCR, fcr);
677
678 serial_txx9_set_mctrl(up, up->mctrl);
679 spin_unlock_irqrestore(&up->lock, flags);
680 }
681
682 static void
serial_txx9_pm(struct uart_port * port,unsigned int state,unsigned int oldstate)683 serial_txx9_pm(struct uart_port *port, unsigned int state,
684 unsigned int oldstate)
685 {
686 /*
687 * If oldstate was -1 this is called from
688 * uart_configure_port(). In this case do not initialize the
689 * port now, because the port was already initialized (for
690 * non-console port) or should not be initialized here (for
691 * console port). If we initialized the port here we lose
692 * serial console settings.
693 */
694 if (state == 0 && oldstate != -1)
695 serial_txx9_initialize(port);
696 }
697
serial_txx9_request_resource(struct uart_port * up)698 static int serial_txx9_request_resource(struct uart_port *up)
699 {
700 unsigned int size = TXX9_REGION_SIZE;
701 int ret = 0;
702
703 switch (up->iotype) {
704 default:
705 if (!up->mapbase)
706 break;
707
708 if (!request_mem_region(up->mapbase, size, "serial_txx9")) {
709 ret = -EBUSY;
710 break;
711 }
712
713 if (up->flags & UPF_IOREMAP) {
714 up->membase = ioremap(up->mapbase, size);
715 if (!up->membase) {
716 release_mem_region(up->mapbase, size);
717 ret = -ENOMEM;
718 }
719 }
720 break;
721
722 case UPIO_PORT:
723 if (!request_region(up->iobase, size, "serial_txx9"))
724 ret = -EBUSY;
725 break;
726 }
727 return ret;
728 }
729
serial_txx9_release_resource(struct uart_port * up)730 static void serial_txx9_release_resource(struct uart_port *up)
731 {
732 unsigned int size = TXX9_REGION_SIZE;
733
734 switch (up->iotype) {
735 default:
736 if (!up->mapbase)
737 break;
738
739 if (up->flags & UPF_IOREMAP) {
740 iounmap(up->membase);
741 up->membase = NULL;
742 }
743
744 release_mem_region(up->mapbase, size);
745 break;
746
747 case UPIO_PORT:
748 release_region(up->iobase, size);
749 break;
750 }
751 }
752
serial_txx9_release_port(struct uart_port * up)753 static void serial_txx9_release_port(struct uart_port *up)
754 {
755 serial_txx9_release_resource(up);
756 }
757
serial_txx9_request_port(struct uart_port * up)758 static int serial_txx9_request_port(struct uart_port *up)
759 {
760 return serial_txx9_request_resource(up);
761 }
762
serial_txx9_config_port(struct uart_port * up,int uflags)763 static void serial_txx9_config_port(struct uart_port *up, int uflags)
764 {
765 int ret;
766
767 /*
768 * Find the region that we can probe for. This in turn
769 * tells us whether we can probe for the type of port.
770 */
771 ret = serial_txx9_request_resource(up);
772 if (ret < 0)
773 return;
774 up->type = PORT_TXX9;
775 up->fifosize = TXX9_SIO_TX_FIFO;
776
777 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
778 if (up->line == up->cons->index)
779 return;
780 #endif
781 serial_txx9_initialize(up);
782 }
783
784 static const char *
serial_txx9_type(struct uart_port * port)785 serial_txx9_type(struct uart_port *port)
786 {
787 return "txx9";
788 }
789
790 static const struct uart_ops serial_txx9_pops = {
791 .tx_empty = serial_txx9_tx_empty,
792 .set_mctrl = serial_txx9_set_mctrl,
793 .get_mctrl = serial_txx9_get_mctrl,
794 .stop_tx = serial_txx9_stop_tx,
795 .start_tx = serial_txx9_start_tx,
796 .stop_rx = serial_txx9_stop_rx,
797 .break_ctl = serial_txx9_break_ctl,
798 .startup = serial_txx9_startup,
799 .shutdown = serial_txx9_shutdown,
800 .set_termios = serial_txx9_set_termios,
801 .pm = serial_txx9_pm,
802 .type = serial_txx9_type,
803 .release_port = serial_txx9_release_port,
804 .request_port = serial_txx9_request_port,
805 .config_port = serial_txx9_config_port,
806 #ifdef CONFIG_CONSOLE_POLL
807 .poll_get_char = serial_txx9_get_poll_char,
808 .poll_put_char = serial_txx9_put_poll_char,
809 #endif
810 };
811
812 static struct uart_port serial_txx9_ports[UART_NR];
813
serial_txx9_register_ports(struct uart_driver * drv,struct device * dev)814 static void __init serial_txx9_register_ports(struct uart_driver *drv,
815 struct device *dev)
816 {
817 int i;
818
819 for (i = 0; i < UART_NR; i++) {
820 struct uart_port *up = &serial_txx9_ports[i];
821
822 up->line = i;
823 up->ops = &serial_txx9_pops;
824 up->dev = dev;
825 if (up->iobase || up->mapbase)
826 uart_add_one_port(drv, up);
827 }
828 }
829
830 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
831
serial_txx9_console_putchar(struct uart_port * up,unsigned char ch)832 static void serial_txx9_console_putchar(struct uart_port *up, unsigned char ch)
833 {
834 wait_for_xmitr(up);
835 sio_out(up, TXX9_SITFIFO, ch);
836 }
837
838 /*
839 * Print a string to the serial port trying not to disturb
840 * any possible real use of the port...
841 *
842 * The console_lock must be held when we get here.
843 */
844 static void
serial_txx9_console_write(struct console * co,const char * s,unsigned int count)845 serial_txx9_console_write(struct console *co, const char *s, unsigned int count)
846 {
847 struct uart_port *up = &serial_txx9_ports[co->index];
848 unsigned int ier, flcr;
849
850 /*
851 * First save the UER then disable the interrupts
852 */
853 ier = sio_in(up, TXX9_SIDICR);
854 sio_out(up, TXX9_SIDICR, 0);
855 /*
856 * Disable flow-control if enabled (and unnecessary)
857 */
858 flcr = sio_in(up, TXX9_SIFLCR);
859 if (!(up->flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES))
860 sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES);
861
862 uart_console_write(up, s, count, serial_txx9_console_putchar);
863
864 /*
865 * Finally, wait for transmitter to become empty
866 * and restore the IER
867 */
868 wait_for_xmitr(up);
869 sio_out(up, TXX9_SIFLCR, flcr);
870 sio_out(up, TXX9_SIDICR, ier);
871 }
872
serial_txx9_console_setup(struct console * co,char * options)873 static int __init serial_txx9_console_setup(struct console *co, char *options)
874 {
875 struct uart_port *up;
876 int baud = 9600;
877 int bits = 8;
878 int parity = 'n';
879 int flow = 'n';
880
881 /*
882 * Check whether an invalid uart number has been specified, and
883 * if so, search for the first available port that does have
884 * console support.
885 */
886 if (co->index >= UART_NR)
887 co->index = 0;
888 up = &serial_txx9_ports[co->index];
889 if (!up->ops)
890 return -ENODEV;
891
892 serial_txx9_initialize(up);
893
894 if (options)
895 uart_parse_options(options, &baud, &parity, &bits, &flow);
896
897 return uart_set_options(up, co, baud, parity, bits, flow);
898 }
899
900 static struct uart_driver serial_txx9_reg;
901 static struct console serial_txx9_console = {
902 .name = TXX9_TTY_NAME,
903 .write = serial_txx9_console_write,
904 .device = uart_console_device,
905 .setup = serial_txx9_console_setup,
906 .flags = CON_PRINTBUFFER,
907 .index = -1,
908 .data = &serial_txx9_reg,
909 };
910
serial_txx9_console_init(void)911 static int __init serial_txx9_console_init(void)
912 {
913 register_console(&serial_txx9_console);
914 return 0;
915 }
916 console_initcall(serial_txx9_console_init);
917
918 #define SERIAL_TXX9_CONSOLE &serial_txx9_console
919 #else
920 #define SERIAL_TXX9_CONSOLE NULL
921 #endif
922
923 static struct uart_driver serial_txx9_reg = {
924 .owner = THIS_MODULE,
925 .driver_name = "serial_txx9",
926 .dev_name = TXX9_TTY_NAME,
927 .major = TXX9_TTY_MAJOR,
928 .minor = TXX9_TTY_MINOR_START,
929 .nr = UART_NR,
930 .cons = SERIAL_TXX9_CONSOLE,
931 };
932
early_serial_txx9_setup(struct uart_port * port)933 int __init early_serial_txx9_setup(struct uart_port *port)
934 {
935 if (port->line >= ARRAY_SIZE(serial_txx9_ports))
936 return -ENODEV;
937
938 serial_txx9_ports[port->line] = *port;
939 serial_txx9_ports[port->line].ops = &serial_txx9_pops;
940 serial_txx9_ports[port->line].flags |=
941 UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
942 return 0;
943 }
944
945 static DEFINE_MUTEX(serial_txx9_mutex);
946
947 /**
948 * serial_txx9_register_port - register a serial port
949 * @port: serial port template
950 *
951 * Configure the serial port specified by the request.
952 *
953 * The port is then probed and if necessary the IRQ is autodetected
954 * If this fails an error is returned.
955 *
956 * On success the port is ready to use and the line number is returned.
957 */
serial_txx9_register_port(struct uart_port * port)958 static int serial_txx9_register_port(struct uart_port *port)
959 {
960 int i;
961 struct uart_port *uart;
962 int ret = -ENOSPC;
963
964 mutex_lock(&serial_txx9_mutex);
965 for (i = 0; i < UART_NR; i++) {
966 uart = &serial_txx9_ports[i];
967 if (uart_match_port(uart, port)) {
968 uart_remove_one_port(&serial_txx9_reg, uart);
969 break;
970 }
971 }
972 if (i == UART_NR) {
973 /* Find unused port */
974 for (i = 0; i < UART_NR; i++) {
975 uart = &serial_txx9_ports[i];
976 if (!(uart->iobase || uart->mapbase))
977 break;
978 }
979 }
980 if (i < UART_NR) {
981 uart->iobase = port->iobase;
982 uart->membase = port->membase;
983 uart->irq = port->irq;
984 uart->uartclk = port->uartclk;
985 uart->iotype = port->iotype;
986 uart->flags = port->flags
987 | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
988 uart->mapbase = port->mapbase;
989 if (port->dev)
990 uart->dev = port->dev;
991 ret = uart_add_one_port(&serial_txx9_reg, uart);
992 if (ret == 0)
993 ret = uart->line;
994 }
995 mutex_unlock(&serial_txx9_mutex);
996 return ret;
997 }
998
999 /**
1000 * serial_txx9_unregister_port - remove a txx9 serial port at runtime
1001 * @line: serial line number
1002 *
1003 * Remove one serial port. This may not be called from interrupt
1004 * context. We hand the port back to the our control.
1005 */
serial_txx9_unregister_port(int line)1006 static void serial_txx9_unregister_port(int line)
1007 {
1008 struct uart_port *uart = &serial_txx9_ports[line];
1009
1010 mutex_lock(&serial_txx9_mutex);
1011 uart_remove_one_port(&serial_txx9_reg, uart);
1012 uart->flags = 0;
1013 uart->type = PORT_UNKNOWN;
1014 uart->iobase = 0;
1015 uart->mapbase = 0;
1016 uart->membase = NULL;
1017 uart->dev = NULL;
1018 mutex_unlock(&serial_txx9_mutex);
1019 }
1020
1021 /*
1022 * Register a set of serial devices attached to a platform device.
1023 */
serial_txx9_probe(struct platform_device * dev)1024 static int serial_txx9_probe(struct platform_device *dev)
1025 {
1026 struct uart_port *p = dev_get_platdata(&dev->dev);
1027 struct uart_port port;
1028 int ret, i;
1029
1030 memset(&port, 0, sizeof(struct uart_port));
1031 for (i = 0; p && p->uartclk != 0; p++, i++) {
1032 port.iobase = p->iobase;
1033 port.membase = p->membase;
1034 port.irq = p->irq;
1035 port.uartclk = p->uartclk;
1036 port.iotype = p->iotype;
1037 port.flags = p->flags;
1038 port.mapbase = p->mapbase;
1039 port.dev = &dev->dev;
1040 port.has_sysrq = IS_ENABLED(CONFIG_SERIAL_TXX9_CONSOLE);
1041 ret = serial_txx9_register_port(&port);
1042 if (ret < 0) {
1043 dev_err(&dev->dev, "unable to register port at index %d "
1044 "(IO%lx MEM%llx IRQ%d): %d\n", i,
1045 p->iobase, (unsigned long long)p->mapbase,
1046 p->irq, ret);
1047 }
1048 }
1049 return 0;
1050 }
1051
1052 /*
1053 * Remove serial ports registered against a platform device.
1054 */
serial_txx9_remove(struct platform_device * dev)1055 static int serial_txx9_remove(struct platform_device *dev)
1056 {
1057 int i;
1058
1059 for (i = 0; i < UART_NR; i++) {
1060 struct uart_port *up = &serial_txx9_ports[i];
1061
1062 if (up->dev == &dev->dev)
1063 serial_txx9_unregister_port(i);
1064 }
1065 return 0;
1066 }
1067
1068 #ifdef CONFIG_PM
serial_txx9_suspend(struct platform_device * dev,pm_message_t state)1069 static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state)
1070 {
1071 int i;
1072
1073 for (i = 0; i < UART_NR; i++) {
1074 struct uart_port *up = &serial_txx9_ports[i];
1075
1076 if (up->type != PORT_UNKNOWN && up->dev == &dev->dev)
1077 uart_suspend_port(&serial_txx9_reg, up);
1078 }
1079
1080 return 0;
1081 }
1082
serial_txx9_resume(struct platform_device * dev)1083 static int serial_txx9_resume(struct platform_device *dev)
1084 {
1085 int i;
1086
1087 for (i = 0; i < UART_NR; i++) {
1088 struct uart_port *up = &serial_txx9_ports[i];
1089
1090 if (up->type != PORT_UNKNOWN && up->dev == &dev->dev)
1091 uart_resume_port(&serial_txx9_reg, up);
1092 }
1093
1094 return 0;
1095 }
1096 #endif
1097
1098 static struct platform_driver serial_txx9_plat_driver = {
1099 .probe = serial_txx9_probe,
1100 .remove = serial_txx9_remove,
1101 #ifdef CONFIG_PM
1102 .suspend = serial_txx9_suspend,
1103 .resume = serial_txx9_resume,
1104 #endif
1105 .driver = {
1106 .name = "serial_txx9",
1107 },
1108 };
1109
1110 #ifdef ENABLE_SERIAL_TXX9_PCI
1111 /*
1112 * Probe one serial board. Unfortunately, there is no rhyme nor reason
1113 * to the arrangement of serial ports on a PCI card.
1114 */
1115 static int
pciserial_txx9_init_one(struct pci_dev * dev,const struct pci_device_id * ent)1116 pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
1117 {
1118 struct uart_port port;
1119 int line;
1120 int rc;
1121
1122 rc = pci_enable_device(dev);
1123 if (rc)
1124 return rc;
1125
1126 memset(&port, 0, sizeof(port));
1127 port.ops = &serial_txx9_pops;
1128 port.flags |= UPF_TXX9_HAVE_CTS_LINE;
1129 port.uartclk = 66670000;
1130 port.irq = dev->irq;
1131 port.iotype = UPIO_PORT;
1132 port.iobase = pci_resource_start(dev, 1);
1133 port.dev = &dev->dev;
1134 line = serial_txx9_register_port(&port);
1135 if (line < 0) {
1136 printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line);
1137 pci_disable_device(dev);
1138 return line;
1139 }
1140 pci_set_drvdata(dev, &serial_txx9_ports[line]);
1141
1142 return 0;
1143 }
1144
pciserial_txx9_remove_one(struct pci_dev * dev)1145 static void pciserial_txx9_remove_one(struct pci_dev *dev)
1146 {
1147 struct uart_port *up = pci_get_drvdata(dev);
1148
1149 if (up) {
1150 serial_txx9_unregister_port(up->line);
1151 pci_disable_device(dev);
1152 }
1153 }
1154
1155 #ifdef CONFIG_PM
pciserial_txx9_suspend_one(struct pci_dev * dev,pm_message_t state)1156 static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)
1157 {
1158 struct uart_port *up = pci_get_drvdata(dev);
1159
1160 if (up)
1161 uart_suspend_port(&serial_txx9_reg, up);
1162 pci_save_state(dev);
1163 pci_set_power_state(dev, pci_choose_state(dev, state));
1164 return 0;
1165 }
1166
pciserial_txx9_resume_one(struct pci_dev * dev)1167 static int pciserial_txx9_resume_one(struct pci_dev *dev)
1168 {
1169 struct uart_port *up = pci_get_drvdata(dev);
1170
1171 pci_set_power_state(dev, PCI_D0);
1172 pci_restore_state(dev);
1173 if (up)
1174 uart_resume_port(&serial_txx9_reg, up);
1175 return 0;
1176 }
1177 #endif
1178
1179 static const struct pci_device_id serial_txx9_pci_tbl[] = {
1180 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC) },
1181 { 0, }
1182 };
1183
1184 static struct pci_driver serial_txx9_pci_driver = {
1185 .name = "serial_txx9",
1186 .probe = pciserial_txx9_init_one,
1187 .remove = pciserial_txx9_remove_one,
1188 #ifdef CONFIG_PM
1189 .suspend = pciserial_txx9_suspend_one,
1190 .resume = pciserial_txx9_resume_one,
1191 #endif
1192 .id_table = serial_txx9_pci_tbl,
1193 };
1194
1195 MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl);
1196 #endif /* ENABLE_SERIAL_TXX9_PCI */
1197
1198 static struct platform_device *serial_txx9_plat_devs;
1199
serial_txx9_init(void)1200 static int __init serial_txx9_init(void)
1201 {
1202 int ret;
1203
1204 ret = uart_register_driver(&serial_txx9_reg);
1205 if (ret)
1206 goto out;
1207
1208 serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1);
1209 if (!serial_txx9_plat_devs) {
1210 ret = -ENOMEM;
1211 goto unreg_uart_drv;
1212 }
1213
1214 ret = platform_device_add(serial_txx9_plat_devs);
1215 if (ret)
1216 goto put_dev;
1217
1218 serial_txx9_register_ports(&serial_txx9_reg,
1219 &serial_txx9_plat_devs->dev);
1220
1221 ret = platform_driver_register(&serial_txx9_plat_driver);
1222 if (ret)
1223 goto del_dev;
1224
1225 #ifdef ENABLE_SERIAL_TXX9_PCI
1226 ret = pci_register_driver(&serial_txx9_pci_driver);
1227 if (ret) {
1228 platform_driver_unregister(&serial_txx9_plat_driver);
1229 }
1230 #endif
1231 if (ret == 0)
1232 goto out;
1233
1234 del_dev:
1235 platform_device_del(serial_txx9_plat_devs);
1236 put_dev:
1237 platform_device_put(serial_txx9_plat_devs);
1238 unreg_uart_drv:
1239 uart_unregister_driver(&serial_txx9_reg);
1240 out:
1241 return ret;
1242 }
1243
serial_txx9_exit(void)1244 static void __exit serial_txx9_exit(void)
1245 {
1246 int i;
1247
1248 #ifdef ENABLE_SERIAL_TXX9_PCI
1249 pci_unregister_driver(&serial_txx9_pci_driver);
1250 #endif
1251 platform_driver_unregister(&serial_txx9_plat_driver);
1252 platform_device_unregister(serial_txx9_plat_devs);
1253 for (i = 0; i < UART_NR; i++) {
1254 struct uart_port *up = &serial_txx9_ports[i];
1255 if (up->iobase || up->mapbase)
1256 uart_remove_one_port(&serial_txx9_reg, up);
1257 }
1258
1259 uart_unregister_driver(&serial_txx9_reg);
1260 }
1261
1262 module_init(serial_txx9_init);
1263 module_exit(serial_txx9_exit);
1264
1265 MODULE_LICENSE("GPL");
1266 MODULE_DESCRIPTION("TX39/49 serial driver");
1267
1268 MODULE_ALIAS_CHARDEV_MAJOR(TXX9_TTY_MAJOR);
1269