Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 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

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

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