Version:  2.0.40 2.2.26 2.4.37 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17

Linux/drivers/tty/serial/serial_txx9.c

  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_1       0x00000000
146 #define TXX9_SIFCR_TDIL_4       0x00000001
147 #define TXX9_SIFCR_TDIL_8       0x00000010
148 #define TXX9_SIFCR_TDIL_MAX     0x00000010
149 #define TXX9_SIFCR_TFRST        0x00000004
150 #define TXX9_SIFCR_RFRST        0x00000002
151 #define TXX9_SIFCR_FRSTE        0x00000001
152 #define TXX9_SIO_TX_FIFO        8
153 #define TXX9_SIO_RX_FIFO        16
154 
155 /* SIFLCR : Flow Control */
156 #define TXX9_SIFLCR_RCS 0x00001000
157 #define TXX9_SIFLCR_TES 0x00000800
158 #define TXX9_SIFLCR_RTSSC       0x00000200
159 #define TXX9_SIFLCR_RSDE        0x00000100
160 #define TXX9_SIFLCR_TSDE        0x00000080
161 #define TXX9_SIFLCR_RTSTL_MASK  0x0000001e
162 #define TXX9_SIFLCR_RTSTL_MAX   0x0000001e
163 #define TXX9_SIFLCR_TBRK        0x00000001
164 
165 /* SIBGR : Baudrate Control */
166 #define TXX9_SIBGR_BCLK_MASK    0x00000300
167 #define TXX9_SIBGR_BCLK_T0      0x00000000
168 #define TXX9_SIBGR_BCLK_T2      0x00000100
169 #define TXX9_SIBGR_BCLK_T4      0x00000200
170 #define TXX9_SIBGR_BCLK_T6      0x00000300
171 #define TXX9_SIBGR_BRD_MASK     0x000000ff
172 
173 static inline unsigned int sio_in(struct uart_txx9_port *up, int offset)
174 {
175         switch (up->port.iotype) {
176         default:
177                 return __raw_readl(up->port.membase + offset);
178         case UPIO_PORT:
179                 return inl(up->port.iobase + offset);
180         }
181 }
182 
183 static inline void
184 sio_out(struct uart_txx9_port *up, int offset, int value)
185 {
186         switch (up->port.iotype) {
187         default:
188                 __raw_writel(value, up->port.membase + offset);
189                 break;
190         case UPIO_PORT:
191                 outl(value, up->port.iobase + offset);
192                 break;
193         }
194 }
195 
196 static inline void
197 sio_mask(struct uart_txx9_port *up, int offset, unsigned int value)
198 {
199         sio_out(up, offset, sio_in(up, offset) & ~value);
200 }
201 static inline void
202 sio_set(struct uart_txx9_port *up, int offset, unsigned int value)
203 {
204         sio_out(up, offset, sio_in(up, offset) | value);
205 }
206 
207 static inline void
208 sio_quot_set(struct uart_txx9_port *up, int quot)
209 {
210         quot >>= 1;
211         if (quot < 256)
212                 sio_out(up, TXX9_SIBGR, quot | TXX9_SIBGR_BCLK_T0);
213         else if (quot < (256 << 2))
214                 sio_out(up, TXX9_SIBGR, (quot >> 2) | TXX9_SIBGR_BCLK_T2);
215         else if (quot < (256 << 4))
216                 sio_out(up, TXX9_SIBGR, (quot >> 4) | TXX9_SIBGR_BCLK_T4);
217         else if (quot < (256 << 6))
218                 sio_out(up, TXX9_SIBGR, (quot >> 6) | TXX9_SIBGR_BCLK_T6);
219         else
220                 sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6);
221 }
222 
223 static struct uart_txx9_port *to_uart_txx9_port(struct uart_port *port)
224 {
225         return container_of(port, struct uart_txx9_port, port);
226 }
227 
228 static void serial_txx9_stop_tx(struct uart_port *port)
229 {
230         struct uart_txx9_port *up = to_uart_txx9_port(port);
231         sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
232 }
233 
234 static void serial_txx9_start_tx(struct uart_port *port)
235 {
236         struct uart_txx9_port *up = to_uart_txx9_port(port);
237         sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
238 }
239 
240 static void serial_txx9_stop_rx(struct uart_port *port)
241 {
242         struct uart_txx9_port *up = to_uart_txx9_port(port);
243         up->port.read_status_mask &= ~TXX9_SIDISR_RDIS;
244 }
245 
246 static void serial_txx9_initialize(struct uart_port *port)
247 {
248         struct uart_txx9_port *up = to_uart_txx9_port(port);
249         unsigned int tmout = 10000;
250 
251         sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST);
252         /* TX4925 BUG WORKAROUND.  Accessing SIOC register
253          * immediately after soft reset causes bus error. */
254         mmiowb();
255         udelay(1);
256         while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout)
257                 udelay(1);
258         /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
259         sio_set(up, TXX9_SIFCR,
260                 TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1);
261         /* initial settings */
262         sio_out(up, TXX9_SILCR,
263                 TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
264                 ((up->port.flags & UPF_TXX9_USE_SCLK) ?
265                  TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
266         sio_quot_set(up, uart_get_divisor(port, 9600));
267         sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
268         sio_out(up, TXX9_SIDICR, 0);
269 }
270 
271 static inline void
272 receive_chars(struct uart_txx9_port *up, unsigned int *status)
273 {
274         unsigned char ch;
275         unsigned int disr = *status;
276         int max_count = 256;
277         char flag;
278         unsigned int next_ignore_status_mask;
279 
280         do {
281                 ch = sio_in(up, TXX9_SIRFIFO);
282                 flag = TTY_NORMAL;
283                 up->port.icount.rx++;
284 
285                 /* mask out RFDN_MASK bit added by previous overrun */
286                 next_ignore_status_mask =
287                         up->port.ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK;
288                 if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER |
289                                      TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) {
290                         /*
291                          * For statistics only
292                          */
293                         if (disr & TXX9_SIDISR_UBRK) {
294                                 disr &= ~(TXX9_SIDISR_UFER | TXX9_SIDISR_UPER);
295                                 up->port.icount.brk++;
296                                 /*
297                                  * We do the SysRQ and SAK checking
298                                  * here because otherwise the break
299                                  * may get masked by ignore_status_mask
300                                  * or read_status_mask.
301                                  */
302                                 if (uart_handle_break(&up->port))
303                                         goto ignore_char;
304                         } else if (disr & TXX9_SIDISR_UPER)
305                                 up->port.icount.parity++;
306                         else if (disr & TXX9_SIDISR_UFER)
307                                 up->port.icount.frame++;
308                         if (disr & TXX9_SIDISR_UOER) {
309                                 up->port.icount.overrun++;
310                                 /*
311                                  * The receiver read buffer still hold
312                                  * a char which caused overrun.
313                                  * Ignore next char by adding RFDN_MASK
314                                  * to ignore_status_mask temporarily.
315                                  */
316                                 next_ignore_status_mask |=
317                                         TXX9_SIDISR_RFDN_MASK;
318                         }
319 
320                         /*
321                          * Mask off conditions which should be ingored.
322                          */
323                         disr &= up->port.read_status_mask;
324 
325                         if (disr & TXX9_SIDISR_UBRK) {
326                                 flag = TTY_BREAK;
327                         } else if (disr & TXX9_SIDISR_UPER)
328                                 flag = TTY_PARITY;
329                         else if (disr & TXX9_SIDISR_UFER)
330                                 flag = TTY_FRAME;
331                 }
332                 if (uart_handle_sysrq_char(&up->port, ch))
333                         goto ignore_char;
334 
335                 uart_insert_char(&up->port, disr, TXX9_SIDISR_UOER, ch, flag);
336 
337         ignore_char:
338                 up->port.ignore_status_mask = next_ignore_status_mask;
339                 disr = sio_in(up, TXX9_SIDISR);
340         } while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0));
341         spin_unlock(&up->port.lock);
342         tty_flip_buffer_push(&up->port.state->port);
343         spin_lock(&up->port.lock);
344         *status = disr;
345 }
346 
347 static inline void transmit_chars(struct uart_txx9_port *up)
348 {
349         struct circ_buf *xmit = &up->port.state->xmit;
350         int count;
351 
352         if (up->port.x_char) {
353                 sio_out(up, TXX9_SITFIFO, up->port.x_char);
354                 up->port.icount.tx++;
355                 up->port.x_char = 0;
356                 return;
357         }
358         if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
359                 serial_txx9_stop_tx(&up->port);
360                 return;
361         }
362 
363         count = TXX9_SIO_TX_FIFO;
364         do {
365                 sio_out(up, TXX9_SITFIFO, xmit->buf[xmit->tail]);
366                 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
367                 up->port.icount.tx++;
368                 if (uart_circ_empty(xmit))
369                         break;
370         } while (--count > 0);
371 
372         if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
373                 uart_write_wakeup(&up->port);
374 
375         if (uart_circ_empty(xmit))
376                 serial_txx9_stop_tx(&up->port);
377 }
378 
379 static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id)
380 {
381         int pass_counter = 0;
382         struct uart_txx9_port *up = dev_id;
383         unsigned int status;
384 
385         while (1) {
386                 spin_lock(&up->port.lock);
387                 status = sio_in(up, TXX9_SIDISR);
388                 if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE))
389                         status &= ~TXX9_SIDISR_TDIS;
390                 if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
391                                 TXX9_SIDISR_TOUT))) {
392                         spin_unlock(&up->port.lock);
393                         break;
394                 }
395 
396                 if (status & TXX9_SIDISR_RDIS)
397                         receive_chars(up, &status);
398                 if (status & TXX9_SIDISR_TDIS)
399                         transmit_chars(up);
400                 /* Clear TX/RX Int. Status */
401                 sio_mask(up, TXX9_SIDISR,
402                          TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
403                          TXX9_SIDISR_TOUT);
404                 spin_unlock(&up->port.lock);
405 
406                 if (pass_counter++ > PASS_LIMIT)
407                         break;
408         }
409 
410         return pass_counter ? IRQ_HANDLED : IRQ_NONE;
411 }
412 
413 static unsigned int serial_txx9_tx_empty(struct uart_port *port)
414 {
415         struct uart_txx9_port *up = to_uart_txx9_port(port);
416         unsigned long flags;
417         unsigned int ret;
418 
419         spin_lock_irqsave(&up->port.lock, flags);
420         ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0;
421         spin_unlock_irqrestore(&up->port.lock, flags);
422 
423         return ret;
424 }
425 
426 static unsigned int serial_txx9_get_mctrl(struct uart_port *port)
427 {
428         struct uart_txx9_port *up = to_uart_txx9_port(port);
429         unsigned int ret;
430 
431         /* no modem control lines */
432         ret = TIOCM_CAR | TIOCM_DSR;
433         ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS;
434         ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS;
435 
436         return ret;
437 }
438 
439 static void serial_txx9_set_mctrl(struct uart_port *port, unsigned int mctrl)
440 {
441         struct uart_txx9_port *up = to_uart_txx9_port(port);
442 
443         if (mctrl & TIOCM_RTS)
444                 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
445         else
446                 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
447 }
448 
449 static void serial_txx9_break_ctl(struct uart_port *port, int break_state)
450 {
451         struct uart_txx9_port *up = to_uart_txx9_port(port);
452         unsigned long flags;
453 
454         spin_lock_irqsave(&up->port.lock, flags);
455         if (break_state == -1)
456                 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
457         else
458                 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
459         spin_unlock_irqrestore(&up->port.lock, flags);
460 }
461 
462 #if defined(CONFIG_SERIAL_TXX9_CONSOLE) || defined(CONFIG_CONSOLE_POLL)
463 /*
464  *      Wait for transmitter & holding register to empty
465  */
466 static void wait_for_xmitr(struct uart_txx9_port *up)
467 {
468         unsigned int tmout = 10000;
469 
470         /* Wait up to 10ms for the character(s) to be sent. */
471         while (--tmout &&
472                !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS))
473                 udelay(1);
474 
475         /* Wait up to 1s for flow control if necessary */
476         if (up->port.flags & UPF_CONS_FLOW) {
477                 tmout = 1000000;
478                 while (--tmout &&
479                        (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS))
480                         udelay(1);
481         }
482 }
483 #endif
484 
485 #ifdef CONFIG_CONSOLE_POLL
486 /*
487  * Console polling routines for writing and reading from the uart while
488  * in an interrupt or debug context.
489  */
490 
491 static int serial_txx9_get_poll_char(struct uart_port *port)
492 {
493         unsigned int ier;
494         unsigned char c;
495         struct uart_txx9_port *up = to_uart_txx9_port(port);
496 
497         /*
498          *      First save the IER then disable the interrupts
499          */
500         ier = sio_in(up, TXX9_SIDICR);
501         sio_out(up, TXX9_SIDICR, 0);
502 
503         while (sio_in(up, TXX9_SIDISR) & TXX9_SIDISR_UVALID)
504                 ;
505 
506         c = sio_in(up, TXX9_SIRFIFO);
507 
508         /*
509          *      Finally, clear RX interrupt status
510          *      and restore the IER
511          */
512         sio_mask(up, TXX9_SIDISR, TXX9_SIDISR_RDIS);
513         sio_out(up, TXX9_SIDICR, ier);
514         return c;
515 }
516 
517 
518 static void serial_txx9_put_poll_char(struct uart_port *port, unsigned char c)
519 {
520         unsigned int ier;
521         struct uart_txx9_port *up = to_uart_txx9_port(port);
522 
523         /*
524          *      First save the IER then disable the interrupts
525          */
526         ier = sio_in(up, TXX9_SIDICR);
527         sio_out(up, TXX9_SIDICR, 0);
528 
529         wait_for_xmitr(up);
530         /*
531          *      Send the character out.
532          */
533         sio_out(up, TXX9_SITFIFO, c);
534 
535         /*
536          *      Finally, wait for transmitter to become empty
537          *      and restore the IER
538          */
539         wait_for_xmitr(up);
540         sio_out(up, TXX9_SIDICR, ier);
541 }
542 
543 #endif /* CONFIG_CONSOLE_POLL */
544 
545 static int serial_txx9_startup(struct uart_port *port)
546 {
547         struct uart_txx9_port *up = to_uart_txx9_port(port);
548         unsigned long flags;
549         int retval;
550 
551         /*
552          * Clear the FIFO buffers and disable them.
553          * (they will be reenabled in set_termios())
554          */
555         sio_set(up, TXX9_SIFCR,
556                 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
557         /* clear reset */
558         sio_mask(up, TXX9_SIFCR,
559                  TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
560         sio_out(up, TXX9_SIDICR, 0);
561 
562         /*
563          * Clear the interrupt registers.
564          */
565         sio_out(up, TXX9_SIDISR, 0);
566 
567         retval = request_irq(up->port.irq, serial_txx9_interrupt,
568                              IRQF_SHARED, "serial_txx9", up);
569         if (retval)
570                 return retval;
571 
572         /*
573          * Now, initialize the UART
574          */
575         spin_lock_irqsave(&up->port.lock, flags);
576         serial_txx9_set_mctrl(&up->port, up->port.mctrl);
577         spin_unlock_irqrestore(&up->port.lock, flags);
578 
579         /* Enable RX/TX */
580         sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
581 
582         /*
583          * Finally, enable interrupts.
584          */
585         sio_set(up, TXX9_SIDICR, TXX9_SIDICR_RIE);
586 
587         return 0;
588 }
589 
590 static void serial_txx9_shutdown(struct uart_port *port)
591 {
592         struct uart_txx9_port *up = to_uart_txx9_port(port);
593         unsigned long flags;
594 
595         /*
596          * Disable interrupts from this port
597          */
598         sio_out(up, TXX9_SIDICR, 0);    /* disable all intrs */
599 
600         spin_lock_irqsave(&up->port.lock, flags);
601         serial_txx9_set_mctrl(&up->port, up->port.mctrl);
602         spin_unlock_irqrestore(&up->port.lock, flags);
603 
604         /*
605          * Disable break condition
606          */
607         sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
608 
609 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
610         if (up->port.cons && up->port.line == up->port.cons->index) {
611                 free_irq(up->port.irq, up);
612                 return;
613         }
614 #endif
615         /* reset FIFOs */
616         sio_set(up, TXX9_SIFCR,
617                 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
618         /* clear reset */
619         sio_mask(up, TXX9_SIFCR,
620                  TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
621 
622         /* Disable RX/TX */
623         sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
624 
625         free_irq(up->port.irq, up);
626 }
627 
628 static void
629 serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios,
630                        struct ktermios *old)
631 {
632         struct uart_txx9_port *up = to_uart_txx9_port(port);
633         unsigned int cval, fcr = 0;
634         unsigned long flags;
635         unsigned int baud, quot;
636 
637         /*
638          * We don't support modem control lines.
639          */
640         termios->c_cflag &= ~(HUPCL | CMSPAR);
641         termios->c_cflag |= CLOCAL;
642 
643         cval = sio_in(up, TXX9_SILCR);
644         /* byte size and parity */
645         cval &= ~TXX9_SILCR_UMODE_MASK;
646         switch (termios->c_cflag & CSIZE) {
647         case CS7:
648                 cval |= TXX9_SILCR_UMODE_7BIT;
649                 break;
650         default:
651         case CS5:       /* not supported */
652         case CS6:       /* not supported */
653         case CS8:
654                 cval |= TXX9_SILCR_UMODE_8BIT;
655                 break;
656         }
657 
658         cval &= ~TXX9_SILCR_USBL_MASK;
659         if (termios->c_cflag & CSTOPB)
660                 cval |= TXX9_SILCR_USBL_2BIT;
661         else
662                 cval |= TXX9_SILCR_USBL_1BIT;
663         cval &= ~(TXX9_SILCR_UPEN | TXX9_SILCR_UEPS);
664         if (termios->c_cflag & PARENB)
665                 cval |= TXX9_SILCR_UPEN;
666         if (!(termios->c_cflag & PARODD))
667                 cval |= TXX9_SILCR_UEPS;
668 
669         /*
670          * Ask the core to calculate the divisor for us.
671          */
672         baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16/2);
673         quot = uart_get_divisor(port, baud);
674 
675         /* Set up FIFOs */
676         /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
677         fcr = TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1;
678 
679         /*
680          * Ok, we're now changing the port state.  Do it with
681          * interrupts disabled.
682          */
683         spin_lock_irqsave(&up->port.lock, flags);
684 
685         /*
686          * Update the per-port timeout.
687          */
688         uart_update_timeout(port, termios->c_cflag, baud);
689 
690         up->port.read_status_mask = TXX9_SIDISR_UOER |
691                 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS;
692         if (termios->c_iflag & INPCK)
693                 up->port.read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER;
694         if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK))
695                 up->port.read_status_mask |= TXX9_SIDISR_UBRK;
696 
697         /*
698          * Characteres to ignore
699          */
700         up->port.ignore_status_mask = 0;
701         if (termios->c_iflag & IGNPAR)
702                 up->port.ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER;
703         if (termios->c_iflag & IGNBRK) {
704                 up->port.ignore_status_mask |= TXX9_SIDISR_UBRK;
705                 /*
706                  * If we're ignoring parity and break indicators,
707                  * ignore overruns too (for real raw support).
708                  */
709                 if (termios->c_iflag & IGNPAR)
710                         up->port.ignore_status_mask |= TXX9_SIDISR_UOER;
711         }
712 
713         /*
714          * ignore all characters if CREAD is not set
715          */
716         if ((termios->c_cflag & CREAD) == 0)
717                 up->port.ignore_status_mask |= TXX9_SIDISR_RDIS;
718 
719         /* CTS flow control flag */
720         if ((termios->c_cflag & CRTSCTS) &&
721             (up->port.flags & UPF_TXX9_HAVE_CTS_LINE)) {
722                 sio_set(up, TXX9_SIFLCR,
723                         TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
724         } else {
725                 sio_mask(up, TXX9_SIFLCR,
726                          TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
727         }
728 
729         sio_out(up, TXX9_SILCR, cval);
730         sio_quot_set(up, quot);
731         sio_out(up, TXX9_SIFCR, fcr);
732 
733         serial_txx9_set_mctrl(&up->port, up->port.mctrl);
734         spin_unlock_irqrestore(&up->port.lock, flags);
735 }
736 
737 static void
738 serial_txx9_pm(struct uart_port *port, unsigned int state,
739               unsigned int oldstate)
740 {
741         /*
742          * If oldstate was -1 this is called from
743          * uart_configure_port().  In this case do not initialize the
744          * port now, because the port was already initialized (for
745          * non-console port) or should not be initialized here (for
746          * console port).  If we initialized the port here we lose
747          * serial console settings.
748          */
749         if (state == 0 && oldstate != -1)
750                 serial_txx9_initialize(port);
751 }
752 
753 static int serial_txx9_request_resource(struct uart_txx9_port *up)
754 {
755         unsigned int size = TXX9_REGION_SIZE;
756         int ret = 0;
757 
758         switch (up->port.iotype) {
759         default:
760                 if (!up->port.mapbase)
761                         break;
762 
763                 if (!request_mem_region(up->port.mapbase, size, "serial_txx9")) {
764                         ret = -EBUSY;
765                         break;
766                 }
767 
768                 if (up->port.flags & UPF_IOREMAP) {
769                         up->port.membase = ioremap(up->port.mapbase, size);
770                         if (!up->port.membase) {
771                                 release_mem_region(up->port.mapbase, size);
772                                 ret = -ENOMEM;
773                         }
774                 }
775                 break;
776 
777         case UPIO_PORT:
778                 if (!request_region(up->port.iobase, size, "serial_txx9"))
779                         ret = -EBUSY;
780                 break;
781         }
782         return ret;
783 }
784 
785 static void serial_txx9_release_resource(struct uart_txx9_port *up)
786 {
787         unsigned int size = TXX9_REGION_SIZE;
788 
789         switch (up->port.iotype) {
790         default:
791                 if (!up->port.mapbase)
792                         break;
793 
794                 if (up->port.flags & UPF_IOREMAP) {
795                         iounmap(up->port.membase);
796                         up->port.membase = NULL;
797                 }
798 
799                 release_mem_region(up->port.mapbase, size);
800                 break;
801 
802         case UPIO_PORT:
803                 release_region(up->port.iobase, size);
804                 break;
805         }
806 }
807 
808 static void serial_txx9_release_port(struct uart_port *port)
809 {
810         struct uart_txx9_port *up = to_uart_txx9_port(port);
811         serial_txx9_release_resource(up);
812 }
813 
814 static int serial_txx9_request_port(struct uart_port *port)
815 {
816         struct uart_txx9_port *up = to_uart_txx9_port(port);
817         return serial_txx9_request_resource(up);
818 }
819 
820 static void serial_txx9_config_port(struct uart_port *port, int uflags)
821 {
822         struct uart_txx9_port *up = to_uart_txx9_port(port);
823         int ret;
824 
825         /*
826          * Find the region that we can probe for.  This in turn
827          * tells us whether we can probe for the type of port.
828          */
829         ret = serial_txx9_request_resource(up);
830         if (ret < 0)
831                 return;
832         port->type = PORT_TXX9;
833         up->port.fifosize = TXX9_SIO_TX_FIFO;
834 
835 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
836         if (up->port.line == up->port.cons->index)
837                 return;
838 #endif
839         serial_txx9_initialize(port);
840 }
841 
842 static const char *
843 serial_txx9_type(struct uart_port *port)
844 {
845         return "txx9";
846 }
847 
848 static struct uart_ops serial_txx9_pops = {
849         .tx_empty       = serial_txx9_tx_empty,
850         .set_mctrl      = serial_txx9_set_mctrl,
851         .get_mctrl      = serial_txx9_get_mctrl,
852         .stop_tx        = serial_txx9_stop_tx,
853         .start_tx       = serial_txx9_start_tx,
854         .stop_rx        = serial_txx9_stop_rx,
855         .break_ctl      = serial_txx9_break_ctl,
856         .startup        = serial_txx9_startup,
857         .shutdown       = serial_txx9_shutdown,
858         .set_termios    = serial_txx9_set_termios,
859         .pm             = serial_txx9_pm,
860         .type           = serial_txx9_type,
861         .release_port   = serial_txx9_release_port,
862         .request_port   = serial_txx9_request_port,
863         .config_port    = serial_txx9_config_port,
864 #ifdef CONFIG_CONSOLE_POLL
865         .poll_get_char  = serial_txx9_get_poll_char,
866         .poll_put_char  = serial_txx9_put_poll_char,
867 #endif
868 };
869 
870 static struct uart_txx9_port serial_txx9_ports[UART_NR];
871 
872 static void __init serial_txx9_register_ports(struct uart_driver *drv,
873                                               struct device *dev)
874 {
875         int i;
876 
877         for (i = 0; i < UART_NR; i++) {
878                 struct uart_txx9_port *up = &serial_txx9_ports[i];
879 
880                 up->port.line = i;
881                 up->port.ops = &serial_txx9_pops;
882                 up->port.dev = dev;
883                 if (up->port.iobase || up->port.mapbase)
884                         uart_add_one_port(drv, &up->port);
885         }
886 }
887 
888 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
889 
890 static void serial_txx9_console_putchar(struct uart_port *port, int ch)
891 {
892         struct uart_txx9_port *up = to_uart_txx9_port(port);
893 
894         wait_for_xmitr(up);
895         sio_out(up, TXX9_SITFIFO, ch);
896 }
897 
898 /*
899  *      Print a string to the serial port trying not to disturb
900  *      any possible real use of the port...
901  *
902  *      The console_lock must be held when we get here.
903  */
904 static void
905 serial_txx9_console_write(struct console *co, const char *s, unsigned int count)
906 {
907         struct uart_txx9_port *up = &serial_txx9_ports[co->index];
908         unsigned int ier, flcr;
909 
910         /*
911          *      First save the UER then disable the interrupts
912          */
913         ier = sio_in(up, TXX9_SIDICR);
914         sio_out(up, TXX9_SIDICR, 0);
915         /*
916          *      Disable flow-control if enabled (and unnecessary)
917          */
918         flcr = sio_in(up, TXX9_SIFLCR);
919         if (!(up->port.flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES))
920                 sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES);
921 
922         uart_console_write(&up->port, s, count, serial_txx9_console_putchar);
923 
924         /*
925          *      Finally, wait for transmitter to become empty
926          *      and restore the IER
927          */
928         wait_for_xmitr(up);
929         sio_out(up, TXX9_SIFLCR, flcr);
930         sio_out(up, TXX9_SIDICR, ier);
931 }
932 
933 static int __init serial_txx9_console_setup(struct console *co, char *options)
934 {
935         struct uart_port *port;
936         struct uart_txx9_port *up;
937         int baud = 9600;
938         int bits = 8;
939         int parity = 'n';
940         int flow = 'n';
941 
942         /*
943          * Check whether an invalid uart number has been specified, and
944          * if so, search for the first available port that does have
945          * console support.
946          */
947         if (co->index >= UART_NR)
948                 co->index = 0;
949         up = &serial_txx9_ports[co->index];
950         port = &up->port;
951         if (!port->ops)
952                 return -ENODEV;
953 
954         serial_txx9_initialize(&up->port);
955 
956         if (options)
957                 uart_parse_options(options, &baud, &parity, &bits, &flow);
958 
959         return uart_set_options(port, co, baud, parity, bits, flow);
960 }
961 
962 static struct uart_driver serial_txx9_reg;
963 static struct console serial_txx9_console = {
964         .name           = TXX9_TTY_NAME,
965         .write          = serial_txx9_console_write,
966         .device         = uart_console_device,
967         .setup          = serial_txx9_console_setup,
968         .flags          = CON_PRINTBUFFER,
969         .index          = -1,
970         .data           = &serial_txx9_reg,
971 };
972 
973 static int __init serial_txx9_console_init(void)
974 {
975         register_console(&serial_txx9_console);
976         return 0;
977 }
978 console_initcall(serial_txx9_console_init);
979 
980 #define SERIAL_TXX9_CONSOLE     &serial_txx9_console
981 #else
982 #define SERIAL_TXX9_CONSOLE     NULL
983 #endif
984 
985 static struct uart_driver serial_txx9_reg = {
986         .owner                  = THIS_MODULE,
987         .driver_name            = "serial_txx9",
988         .dev_name               = TXX9_TTY_NAME,
989         .major                  = TXX9_TTY_MAJOR,
990         .minor                  = TXX9_TTY_MINOR_START,
991         .nr                     = UART_NR,
992         .cons                   = SERIAL_TXX9_CONSOLE,
993 };
994 
995 int __init early_serial_txx9_setup(struct uart_port *port)
996 {
997         if (port->line >= ARRAY_SIZE(serial_txx9_ports))
998                 return -ENODEV;
999 
1000         serial_txx9_ports[port->line].port = *port;
1001         serial_txx9_ports[port->line].port.ops = &serial_txx9_pops;
1002         serial_txx9_ports[port->line].port.flags |=
1003                 UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
1004         return 0;
1005 }
1006 
1007 static DEFINE_MUTEX(serial_txx9_mutex);
1008 
1009 /**
1010  *      serial_txx9_register_port - register a serial port
1011  *      @port: serial port template
1012  *
1013  *      Configure the serial port specified by the request.
1014  *
1015  *      The port is then probed and if necessary the IRQ is autodetected
1016  *      If this fails an error is returned.
1017  *
1018  *      On success the port is ready to use and the line number is returned.
1019  */
1020 static int serial_txx9_register_port(struct uart_port *port)
1021 {
1022         int i;
1023         struct uart_txx9_port *uart;
1024         int ret = -ENOSPC;
1025 
1026         mutex_lock(&serial_txx9_mutex);
1027         for (i = 0; i < UART_NR; i++) {
1028                 uart = &serial_txx9_ports[i];
1029                 if (uart_match_port(&uart->port, port)) {
1030                         uart_remove_one_port(&serial_txx9_reg, &uart->port);
1031                         break;
1032                 }
1033         }
1034         if (i == UART_NR) {
1035                 /* Find unused port */
1036                 for (i = 0; i < UART_NR; i++) {
1037                         uart = &serial_txx9_ports[i];
1038                         if (!(uart->port.iobase || uart->port.mapbase))
1039                                 break;
1040                 }
1041         }
1042         if (i < UART_NR) {
1043                 uart->port.iobase = port->iobase;
1044                 uart->port.membase = port->membase;
1045                 uart->port.irq      = port->irq;
1046                 uart->port.uartclk  = port->uartclk;
1047                 uart->port.iotype   = port->iotype;
1048                 uart->port.flags    = port->flags
1049                         | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
1050                 uart->port.mapbase  = port->mapbase;
1051                 if (port->dev)
1052                         uart->port.dev = port->dev;
1053                 ret = uart_add_one_port(&serial_txx9_reg, &uart->port);
1054                 if (ret == 0)
1055                         ret = uart->port.line;
1056         }
1057         mutex_unlock(&serial_txx9_mutex);
1058         return ret;
1059 }
1060 
1061 /**
1062  *      serial_txx9_unregister_port - remove a txx9 serial port at runtime
1063  *      @line: serial line number
1064  *
1065  *      Remove one serial port.  This may not be called from interrupt
1066  *      context.  We hand the port back to the our control.
1067  */
1068 static void serial_txx9_unregister_port(int line)
1069 {
1070         struct uart_txx9_port *uart = &serial_txx9_ports[line];
1071 
1072         mutex_lock(&serial_txx9_mutex);
1073         uart_remove_one_port(&serial_txx9_reg, &uart->port);
1074         uart->port.flags = 0;
1075         uart->port.type = PORT_UNKNOWN;
1076         uart->port.iobase = 0;
1077         uart->port.mapbase = 0;
1078         uart->port.membase = NULL;
1079         uart->port.dev = NULL;
1080         mutex_unlock(&serial_txx9_mutex);
1081 }
1082 
1083 /*
1084  * Register a set of serial devices attached to a platform device.
1085  */
1086 static int serial_txx9_probe(struct platform_device *dev)
1087 {
1088         struct uart_port *p = dev_get_platdata(&dev->dev);
1089         struct uart_port port;
1090         int ret, i;
1091 
1092         memset(&port, 0, sizeof(struct uart_port));
1093         for (i = 0; p && p->uartclk != 0; p++, i++) {
1094                 port.iobase     = p->iobase;
1095                 port.membase    = p->membase;
1096                 port.irq        = p->irq;
1097                 port.uartclk    = p->uartclk;
1098                 port.iotype     = p->iotype;
1099                 port.flags      = p->flags;
1100                 port.mapbase    = p->mapbase;
1101                 port.dev        = &dev->dev;
1102                 ret = serial_txx9_register_port(&port);
1103                 if (ret < 0) {
1104                         dev_err(&dev->dev, "unable to register port at index %d "
1105                                 "(IO%lx MEM%llx IRQ%d): %d\n", i,
1106                                 p->iobase, (unsigned long long)p->mapbase,
1107                                 p->irq, ret);
1108                 }
1109         }
1110         return 0;
1111 }
1112 
1113 /*
1114  * Remove serial ports registered against a platform device.
1115  */
1116 static int serial_txx9_remove(struct platform_device *dev)
1117 {
1118         int i;
1119 
1120         for (i = 0; i < UART_NR; i++) {
1121                 struct uart_txx9_port *up = &serial_txx9_ports[i];
1122 
1123                 if (up->port.dev == &dev->dev)
1124                         serial_txx9_unregister_port(i);
1125         }
1126         return 0;
1127 }
1128 
1129 #ifdef CONFIG_PM
1130 static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state)
1131 {
1132         int i;
1133 
1134         for (i = 0; i < UART_NR; i++) {
1135                 struct uart_txx9_port *up = &serial_txx9_ports[i];
1136 
1137                 if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
1138                         uart_suspend_port(&serial_txx9_reg, &up->port);
1139         }
1140 
1141         return 0;
1142 }
1143 
1144 static int serial_txx9_resume(struct platform_device *dev)
1145 {
1146         int i;
1147 
1148         for (i = 0; i < UART_NR; i++) {
1149                 struct uart_txx9_port *up = &serial_txx9_ports[i];
1150 
1151                 if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
1152                         uart_resume_port(&serial_txx9_reg, &up->port);
1153         }
1154 
1155         return 0;
1156 }
1157 #endif
1158 
1159 static struct platform_driver serial_txx9_plat_driver = {
1160         .probe          = serial_txx9_probe,
1161         .remove         = serial_txx9_remove,
1162 #ifdef CONFIG_PM
1163         .suspend        = serial_txx9_suspend,
1164         .resume         = serial_txx9_resume,
1165 #endif
1166         .driver         = {
1167                 .name   = "serial_txx9",
1168                 .owner  = THIS_MODULE,
1169         },
1170 };
1171 
1172 #ifdef ENABLE_SERIAL_TXX9_PCI
1173 /*
1174  * Probe one serial board.  Unfortunately, there is no rhyme nor reason
1175  * to the arrangement of serial ports on a PCI card.
1176  */
1177 static int
1178 pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
1179 {
1180         struct uart_port port;
1181         int line;
1182         int rc;
1183 
1184         rc = pci_enable_device(dev);
1185         if (rc)
1186                 return rc;
1187 
1188         memset(&port, 0, sizeof(port));
1189         port.ops = &serial_txx9_pops;
1190         port.flags |= UPF_TXX9_HAVE_CTS_LINE;
1191         port.uartclk = 66670000;
1192         port.irq = dev->irq;
1193         port.iotype = UPIO_PORT;
1194         port.iobase = pci_resource_start(dev, 1);
1195         port.dev = &dev->dev;
1196         line = serial_txx9_register_port(&port);
1197         if (line < 0) {
1198                 printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line);
1199                 pci_disable_device(dev);
1200                 return line;
1201         }
1202         pci_set_drvdata(dev, &serial_txx9_ports[line]);
1203 
1204         return 0;
1205 }
1206 
1207 static void pciserial_txx9_remove_one(struct pci_dev *dev)
1208 {
1209         struct uart_txx9_port *up = pci_get_drvdata(dev);
1210 
1211         if (up) {
1212                 serial_txx9_unregister_port(up->port.line);
1213                 pci_disable_device(dev);
1214         }
1215 }
1216 
1217 #ifdef CONFIG_PM
1218 static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)
1219 {
1220         struct uart_txx9_port *up = pci_get_drvdata(dev);
1221 
1222         if (up)
1223                 uart_suspend_port(&serial_txx9_reg, &up->port);
1224         pci_save_state(dev);
1225         pci_set_power_state(dev, pci_choose_state(dev, state));
1226         return 0;
1227 }
1228 
1229 static int pciserial_txx9_resume_one(struct pci_dev *dev)
1230 {
1231         struct uart_txx9_port *up = pci_get_drvdata(dev);
1232 
1233         pci_set_power_state(dev, PCI_D0);
1234         pci_restore_state(dev);
1235         if (up)
1236                 uart_resume_port(&serial_txx9_reg, &up->port);
1237         return 0;
1238 }
1239 #endif
1240 
1241 static const struct pci_device_id serial_txx9_pci_tbl[] = {
1242         { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC) },
1243         { 0, }
1244 };
1245 
1246 static struct pci_driver serial_txx9_pci_driver = {
1247         .name           = "serial_txx9",
1248         .probe          = pciserial_txx9_init_one,
1249         .remove         = pciserial_txx9_remove_one,
1250 #ifdef CONFIG_PM
1251         .suspend        = pciserial_txx9_suspend_one,
1252         .resume         = pciserial_txx9_resume_one,
1253 #endif
1254         .id_table       = serial_txx9_pci_tbl,
1255 };
1256 
1257 MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl);
1258 #endif /* ENABLE_SERIAL_TXX9_PCI */
1259 
1260 static struct platform_device *serial_txx9_plat_devs;
1261 
1262 static int __init serial_txx9_init(void)
1263 {
1264         int ret;
1265 
1266         printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
1267 
1268         ret = uart_register_driver(&serial_txx9_reg);
1269         if (ret)
1270                 goto out;
1271 
1272         serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1);
1273         if (!serial_txx9_plat_devs) {
1274                 ret = -ENOMEM;
1275                 goto unreg_uart_drv;
1276         }
1277 
1278         ret = platform_device_add(serial_txx9_plat_devs);
1279         if (ret)
1280                 goto put_dev;
1281 
1282         serial_txx9_register_ports(&serial_txx9_reg,
1283                                    &serial_txx9_plat_devs->dev);
1284 
1285         ret = platform_driver_register(&serial_txx9_plat_driver);
1286         if (ret)
1287                 goto del_dev;
1288 
1289 #ifdef ENABLE_SERIAL_TXX9_PCI
1290         ret = pci_register_driver(&serial_txx9_pci_driver);
1291 #endif
1292         if (ret == 0)
1293                 goto out;
1294 
1295  del_dev:
1296         platform_device_del(serial_txx9_plat_devs);
1297  put_dev:
1298         platform_device_put(serial_txx9_plat_devs);
1299  unreg_uart_drv:
1300         uart_unregister_driver(&serial_txx9_reg);
1301  out:
1302         return ret;
1303 }
1304 
1305 static void __exit serial_txx9_exit(void)
1306 {
1307         int i;
1308 
1309 #ifdef ENABLE_SERIAL_TXX9_PCI
1310         pci_unregister_driver(&serial_txx9_pci_driver);
1311 #endif
1312         platform_driver_unregister(&serial_txx9_plat_driver);
1313         platform_device_unregister(serial_txx9_plat_devs);
1314         for (i = 0; i < UART_NR; i++) {
1315                 struct uart_txx9_port *up = &serial_txx9_ports[i];
1316                 if (up->port.iobase || up->port.mapbase)
1317                         uart_remove_one_port(&serial_txx9_reg, &up->port);
1318         }
1319 
1320         uart_unregister_driver(&serial_txx9_reg);
1321 }
1322 
1323 module_init(serial_txx9_init);
1324 module_exit(serial_txx9_exit);
1325 
1326 MODULE_LICENSE("GPL");
1327 MODULE_DESCRIPTION("TX39/49 serial driver");
1328 
1329 MODULE_ALIAS_CHARDEV_MAJOR(TXX9_TTY_MAJOR);
1330 

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