2 * drivers/serial/serial_txx9.c
4 * Derived from many drivers using generic_serial interface,
5 * especially serial_tx3912.c by Steven J. Hill and r39xx_serial.c
6 * (was in Linux/VR tree) by Jim Pick.
8 * Copyright (C) 1999 Harald Koerfgen
9 * Copyright (C) 2000 Jim Pick <jim@jimpick.com>
10 * Copyright (C) 2001 Steven J. Hill (sjhill@realitydiluted.com)
11 * Copyright (C) 2000-2002 Toshiba Corporation
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
17 * Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller
20 #if defined(CONFIG_SERIAL_TXX9_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
24 #include <linux/module.h>
25 #include <linux/ioport.h>
26 #include <linux/init.h>
27 #include <linux/console.h>
28 #include <linux/sysrq.h>
29 #include <linux/delay.h>
30 #include <linux/platform_device.h>
31 #include <linux/pci.h>
32 #include <linux/tty.h>
33 #include <linux/tty_flip.h>
34 #include <linux/serial_core.h>
35 #include <linux/serial.h>
36 #include <linux/mutex.h>
40 static char *serial_version = "1.09";
41 static char *serial_name = "TX39/49 Serial driver";
43 #define PASS_LIMIT 256
45 #if !defined(CONFIG_SERIAL_TXX9_STDSERIAL)
46 /* "ttyS" is used for standard serial driver */
47 #define TXX9_TTY_NAME "ttyTX"
48 #define TXX9_TTY_MINOR_START 196
49 #define TXX9_TTY_MAJOR 204
51 /* acts like standard serial driver */
52 #define TXX9_TTY_NAME "ttyS"
53 #define TXX9_TTY_MINOR_START 64
54 #define TXX9_TTY_MAJOR TTY_MAJOR
58 #define UPF_TXX9_HAVE_CTS_LINE UPF_BUGGY_UART
59 #define UPF_TXX9_USE_SCLK UPF_MAGIC_MULTIPLIER
62 /* support for Toshiba TC86C001 SIO */
63 #define ENABLE_SERIAL_TXX9_PCI
67 * Number of serial ports
69 #define UART_NR CONFIG_SERIAL_TXX9_NR_UARTS
71 #define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8)
73 struct uart_txx9_port {
74 struct uart_port port;
75 /* No additional info for now */
78 #define TXX9_REGION_SIZE 0x24
80 /* TXX9 Serial Registers */
81 #define TXX9_SILCR 0x00
82 #define TXX9_SIDICR 0x04
83 #define TXX9_SIDISR 0x08
84 #define TXX9_SICISR 0x0c
85 #define TXX9_SIFCR 0x10
86 #define TXX9_SIFLCR 0x14
87 #define TXX9_SIBGR 0x18
88 #define TXX9_SITFIFO 0x1c
89 #define TXX9_SIRFIFO 0x20
91 /* SILCR : Line Control */
92 #define TXX9_SILCR_SCS_MASK 0x00000060
93 #define TXX9_SILCR_SCS_IMCLK 0x00000000
94 #define TXX9_SILCR_SCS_IMCLK_BG 0x00000020
95 #define TXX9_SILCR_SCS_SCLK 0x00000040
96 #define TXX9_SILCR_SCS_SCLK_BG 0x00000060
97 #define TXX9_SILCR_UEPS 0x00000010
98 #define TXX9_SILCR_UPEN 0x00000008
99 #define TXX9_SILCR_USBL_MASK 0x00000004
100 #define TXX9_SILCR_USBL_1BIT 0x00000000
101 #define TXX9_SILCR_USBL_2BIT 0x00000004
102 #define TXX9_SILCR_UMODE_MASK 0x00000003
103 #define TXX9_SILCR_UMODE_8BIT 0x00000000
104 #define TXX9_SILCR_UMODE_7BIT 0x00000001
106 /* SIDICR : DMA/Int. Control */
107 #define TXX9_SIDICR_TDE 0x00008000
108 #define TXX9_SIDICR_RDE 0x00004000
109 #define TXX9_SIDICR_TIE 0x00002000
110 #define TXX9_SIDICR_RIE 0x00001000
111 #define TXX9_SIDICR_SPIE 0x00000800
112 #define TXX9_SIDICR_CTSAC 0x00000600
113 #define TXX9_SIDICR_STIE_MASK 0x0000003f
114 #define TXX9_SIDICR_STIE_OERS 0x00000020
115 #define TXX9_SIDICR_STIE_CTSS 0x00000010
116 #define TXX9_SIDICR_STIE_RBRKD 0x00000008
117 #define TXX9_SIDICR_STIE_TRDY 0x00000004
118 #define TXX9_SIDICR_STIE_TXALS 0x00000002
119 #define TXX9_SIDICR_STIE_UBRKD 0x00000001
121 /* SIDISR : DMA/Int. Status */
122 #define TXX9_SIDISR_UBRK 0x00008000
123 #define TXX9_SIDISR_UVALID 0x00004000
124 #define TXX9_SIDISR_UFER 0x00002000
125 #define TXX9_SIDISR_UPER 0x00001000
126 #define TXX9_SIDISR_UOER 0x00000800
127 #define TXX9_SIDISR_ERI 0x00000400
128 #define TXX9_SIDISR_TOUT 0x00000200
129 #define TXX9_SIDISR_TDIS 0x00000100
130 #define TXX9_SIDISR_RDIS 0x00000080
131 #define TXX9_SIDISR_STIS 0x00000040
132 #define TXX9_SIDISR_RFDN_MASK 0x0000001f
134 /* SICISR : Change Int. Status */
135 #define TXX9_SICISR_OERS 0x00000020
136 #define TXX9_SICISR_CTSS 0x00000010
137 #define TXX9_SICISR_RBRKD 0x00000008
138 #define TXX9_SICISR_TRDY 0x00000004
139 #define TXX9_SICISR_TXALS 0x00000002
140 #define TXX9_SICISR_UBRKD 0x00000001
142 /* SIFCR : FIFO Control */
143 #define TXX9_SIFCR_SWRST 0x00008000
144 #define TXX9_SIFCR_RDIL_MASK 0x00000180
145 #define TXX9_SIFCR_RDIL_1 0x00000000
146 #define TXX9_SIFCR_RDIL_4 0x00000080
147 #define TXX9_SIFCR_RDIL_8 0x00000100
148 #define TXX9_SIFCR_RDIL_12 0x00000180
149 #define TXX9_SIFCR_RDIL_MAX 0x00000180
150 #define TXX9_SIFCR_TDIL_MASK 0x00000018
151 #define TXX9_SIFCR_TDIL_MASK 0x00000018
152 #define TXX9_SIFCR_TDIL_1 0x00000000
153 #define TXX9_SIFCR_TDIL_4 0x00000001
154 #define TXX9_SIFCR_TDIL_8 0x00000010
155 #define TXX9_SIFCR_TDIL_MAX 0x00000010
156 #define TXX9_SIFCR_TFRST 0x00000004
157 #define TXX9_SIFCR_RFRST 0x00000002
158 #define TXX9_SIFCR_FRSTE 0x00000001
159 #define TXX9_SIO_TX_FIFO 8
160 #define TXX9_SIO_RX_FIFO 16
162 /* SIFLCR : Flow Control */
163 #define TXX9_SIFLCR_RCS 0x00001000
164 #define TXX9_SIFLCR_TES 0x00000800
165 #define TXX9_SIFLCR_RTSSC 0x00000200
166 #define TXX9_SIFLCR_RSDE 0x00000100
167 #define TXX9_SIFLCR_TSDE 0x00000080
168 #define TXX9_SIFLCR_RTSTL_MASK 0x0000001e
169 #define TXX9_SIFLCR_RTSTL_MAX 0x0000001e
170 #define TXX9_SIFLCR_TBRK 0x00000001
172 /* SIBGR : Baudrate Control */
173 #define TXX9_SIBGR_BCLK_MASK 0x00000300
174 #define TXX9_SIBGR_BCLK_T0 0x00000000
175 #define TXX9_SIBGR_BCLK_T2 0x00000100
176 #define TXX9_SIBGR_BCLK_T4 0x00000200
177 #define TXX9_SIBGR_BCLK_T6 0x00000300
178 #define TXX9_SIBGR_BRD_MASK 0x000000ff
180 static inline unsigned int sio_in(struct uart_txx9_port *up, int offset)
182 switch (up->port.iotype) {
184 return __raw_readl(up->port.membase + offset);
186 return inl(up->port.iobase + offset);
191 sio_out(struct uart_txx9_port *up, int offset, int value)
193 switch (up->port.iotype) {
195 __raw_writel(value, up->port.membase + offset);
198 outl(value, up->port.iobase + offset);
204 sio_mask(struct uart_txx9_port *up, int offset, unsigned int value)
206 sio_out(up, offset, sio_in(up, offset) & ~value);
209 sio_set(struct uart_txx9_port *up, int offset, unsigned int value)
211 sio_out(up, offset, sio_in(up, offset) | value);
215 sio_quot_set(struct uart_txx9_port *up, int quot)
219 sio_out(up, TXX9_SIBGR, quot | TXX9_SIBGR_BCLK_T0);
220 else if (quot < (256 << 2))
221 sio_out(up, TXX9_SIBGR, (quot >> 2) | TXX9_SIBGR_BCLK_T2);
222 else if (quot < (256 << 4))
223 sio_out(up, TXX9_SIBGR, (quot >> 4) | TXX9_SIBGR_BCLK_T4);
224 else if (quot < (256 << 6))
225 sio_out(up, TXX9_SIBGR, (quot >> 6) | TXX9_SIBGR_BCLK_T6);
227 sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6);
230 static void serial_txx9_stop_tx(struct uart_port *port)
232 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
233 sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
236 static void serial_txx9_start_tx(struct uart_port *port)
238 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
239 sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
242 static void serial_txx9_stop_rx(struct uart_port *port)
244 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
245 up->port.read_status_mask &= ~TXX9_SIDISR_RDIS;
248 static void serial_txx9_enable_ms(struct uart_port *port)
250 /* TXX9-SIO can not control DTR... */
253 static void serial_txx9_initialize(struct uart_port *port)
255 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
256 unsigned int tmout = 10000;
258 sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST);
259 /* TX4925 BUG WORKAROUND. Accessing SIOC register
260 * immediately after soft reset causes bus error. */
263 while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout)
265 /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
266 sio_set(up, TXX9_SIFCR,
267 TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1);
268 /* initial settings */
269 sio_out(up, TXX9_SILCR,
270 TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
271 ((up->port.flags & UPF_TXX9_USE_SCLK) ?
272 TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
273 sio_quot_set(up, uart_get_divisor(port, 9600));
274 sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
275 sio_out(up, TXX9_SIDICR, 0);
279 receive_chars(struct uart_txx9_port *up, unsigned int *status)
281 struct tty_struct *tty = up->port.info->tty;
283 unsigned int disr = *status;
286 unsigned int next_ignore_status_mask;
289 ch = sio_in(up, TXX9_SIRFIFO);
291 up->port.icount.rx++;
293 /* mask out RFDN_MASK bit added by previous overrun */
294 next_ignore_status_mask =
295 up->port.ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK;
296 if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER |
297 TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) {
299 * For statistics only
301 if (disr & TXX9_SIDISR_UBRK) {
302 disr &= ~(TXX9_SIDISR_UFER | TXX9_SIDISR_UPER);
303 up->port.icount.brk++;
305 * We do the SysRQ and SAK checking
306 * here because otherwise the break
307 * may get masked by ignore_status_mask
308 * or read_status_mask.
310 if (uart_handle_break(&up->port))
312 } else if (disr & TXX9_SIDISR_UPER)
313 up->port.icount.parity++;
314 else if (disr & TXX9_SIDISR_UFER)
315 up->port.icount.frame++;
316 if (disr & TXX9_SIDISR_UOER) {
317 up->port.icount.overrun++;
319 * The receiver read buffer still hold
320 * a char which caused overrun.
321 * Ignore next char by adding RFDN_MASK
322 * to ignore_status_mask temporarily.
324 next_ignore_status_mask |=
325 TXX9_SIDISR_RFDN_MASK;
329 * Mask off conditions which should be ingored.
331 disr &= up->port.read_status_mask;
333 if (disr & TXX9_SIDISR_UBRK) {
335 } else if (disr & TXX9_SIDISR_UPER)
337 else if (disr & TXX9_SIDISR_UFER)
340 if (uart_handle_sysrq_char(&up->port, ch))
343 uart_insert_char(&up->port, disr, TXX9_SIDISR_UOER, ch, flag);
346 up->port.ignore_status_mask = next_ignore_status_mask;
347 disr = sio_in(up, TXX9_SIDISR);
348 } while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0));
349 spin_unlock(&up->port.lock);
350 tty_flip_buffer_push(tty);
351 spin_lock(&up->port.lock);
355 static inline void transmit_chars(struct uart_txx9_port *up)
357 struct circ_buf *xmit = &up->port.info->xmit;
360 if (up->port.x_char) {
361 sio_out(up, TXX9_SITFIFO, up->port.x_char);
362 up->port.icount.tx++;
366 if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
367 serial_txx9_stop_tx(&up->port);
371 count = TXX9_SIO_TX_FIFO;
373 sio_out(up, TXX9_SITFIFO, xmit->buf[xmit->tail]);
374 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
375 up->port.icount.tx++;
376 if (uart_circ_empty(xmit))
378 } while (--count > 0);
380 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
381 uart_write_wakeup(&up->port);
383 if (uart_circ_empty(xmit))
384 serial_txx9_stop_tx(&up->port);
387 static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id)
389 int pass_counter = 0;
390 struct uart_txx9_port *up = dev_id;
394 spin_lock(&up->port.lock);
395 status = sio_in(up, TXX9_SIDISR);
396 if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE))
397 status &= ~TXX9_SIDISR_TDIS;
398 if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
399 TXX9_SIDISR_TOUT))) {
400 spin_unlock(&up->port.lock);
404 if (status & TXX9_SIDISR_RDIS)
405 receive_chars(up, &status);
406 if (status & TXX9_SIDISR_TDIS)
408 /* Clear TX/RX Int. Status */
409 sio_mask(up, TXX9_SIDISR,
410 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
412 spin_unlock(&up->port.lock);
414 if (pass_counter++ > PASS_LIMIT)
418 return pass_counter ? IRQ_HANDLED : IRQ_NONE;
421 static unsigned int serial_txx9_tx_empty(struct uart_port *port)
423 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
427 spin_lock_irqsave(&up->port.lock, flags);
428 ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0;
429 spin_unlock_irqrestore(&up->port.lock, flags);
434 static unsigned int serial_txx9_get_mctrl(struct uart_port *port)
436 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
439 ret = ((sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS)
440 | ((sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS);
445 static void serial_txx9_set_mctrl(struct uart_port *port, unsigned int mctrl)
447 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
449 if (mctrl & TIOCM_RTS)
450 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
452 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
455 static void serial_txx9_break_ctl(struct uart_port *port, int break_state)
457 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
460 spin_lock_irqsave(&up->port.lock, flags);
461 if (break_state == -1)
462 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
464 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
465 spin_unlock_irqrestore(&up->port.lock, flags);
468 static int serial_txx9_startup(struct uart_port *port)
470 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
475 * Clear the FIFO buffers and disable them.
476 * (they will be reenabled in set_termios())
478 sio_set(up, TXX9_SIFCR,
479 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
481 sio_mask(up, TXX9_SIFCR,
482 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
483 sio_out(up, TXX9_SIDICR, 0);
486 * Clear the interrupt registers.
488 sio_out(up, TXX9_SIDISR, 0);
490 retval = request_irq(up->port.irq, serial_txx9_interrupt,
491 IRQF_SHARED, "serial_txx9", up);
496 * Now, initialize the UART
498 spin_lock_irqsave(&up->port.lock, flags);
499 serial_txx9_set_mctrl(&up->port, up->port.mctrl);
500 spin_unlock_irqrestore(&up->port.lock, flags);
503 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
506 * Finally, enable interrupts.
508 sio_set(up, TXX9_SIDICR, TXX9_SIDICR_RIE);
513 static void serial_txx9_shutdown(struct uart_port *port)
515 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
519 * Disable interrupts from this port
521 sio_out(up, TXX9_SIDICR, 0); /* disable all intrs */
523 spin_lock_irqsave(&up->port.lock, flags);
524 serial_txx9_set_mctrl(&up->port, up->port.mctrl);
525 spin_unlock_irqrestore(&up->port.lock, flags);
528 * Disable break condition
530 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
532 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
533 if (up->port.cons && up->port.line == up->port.cons->index) {
534 free_irq(up->port.irq, up);
539 sio_set(up, TXX9_SIFCR,
540 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
542 sio_mask(up, TXX9_SIFCR,
543 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
546 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
548 free_irq(up->port.irq, up);
552 serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios,
553 struct ktermios *old)
555 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
556 unsigned int cval, fcr = 0;
558 unsigned int baud, quot;
560 cval = sio_in(up, TXX9_SILCR);
561 /* byte size and parity */
562 cval &= ~TXX9_SILCR_UMODE_MASK;
563 switch (termios->c_cflag & CSIZE) {
565 cval |= TXX9_SILCR_UMODE_7BIT;
568 case CS5: /* not supported */
569 case CS6: /* not supported */
571 cval |= TXX9_SILCR_UMODE_8BIT;
575 cval &= ~TXX9_SILCR_USBL_MASK;
576 if (termios->c_cflag & CSTOPB)
577 cval |= TXX9_SILCR_USBL_2BIT;
579 cval |= TXX9_SILCR_USBL_1BIT;
580 cval &= ~(TXX9_SILCR_UPEN | TXX9_SILCR_UEPS);
581 if (termios->c_cflag & PARENB)
582 cval |= TXX9_SILCR_UPEN;
583 if (!(termios->c_cflag & PARODD))
584 cval |= TXX9_SILCR_UEPS;
587 * Ask the core to calculate the divisor for us.
589 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16/2);
590 quot = uart_get_divisor(port, baud);
593 /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
594 fcr = TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1;
597 * Ok, we're now changing the port state. Do it with
598 * interrupts disabled.
600 spin_lock_irqsave(&up->port.lock, flags);
603 * Update the per-port timeout.
605 uart_update_timeout(port, termios->c_cflag, baud);
607 up->port.read_status_mask = TXX9_SIDISR_UOER |
608 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS;
609 if (termios->c_iflag & INPCK)
610 up->port.read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER;
611 if (termios->c_iflag & (BRKINT | PARMRK))
612 up->port.read_status_mask |= TXX9_SIDISR_UBRK;
615 * Characteres to ignore
617 up->port.ignore_status_mask = 0;
618 if (termios->c_iflag & IGNPAR)
619 up->port.ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER;
620 if (termios->c_iflag & IGNBRK) {
621 up->port.ignore_status_mask |= TXX9_SIDISR_UBRK;
623 * If we're ignoring parity and break indicators,
624 * ignore overruns too (for real raw support).
626 if (termios->c_iflag & IGNPAR)
627 up->port.ignore_status_mask |= TXX9_SIDISR_UOER;
631 * ignore all characters if CREAD is not set
633 if ((termios->c_cflag & CREAD) == 0)
634 up->port.ignore_status_mask |= TXX9_SIDISR_RDIS;
636 /* CTS flow control flag */
637 if ((termios->c_cflag & CRTSCTS) &&
638 (up->port.flags & UPF_TXX9_HAVE_CTS_LINE)) {
639 sio_set(up, TXX9_SIFLCR,
640 TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
642 sio_mask(up, TXX9_SIFLCR,
643 TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
646 sio_out(up, TXX9_SILCR, cval);
647 sio_quot_set(up, quot);
648 sio_out(up, TXX9_SIFCR, fcr);
650 serial_txx9_set_mctrl(&up->port, up->port.mctrl);
651 spin_unlock_irqrestore(&up->port.lock, flags);
655 serial_txx9_pm(struct uart_port *port, unsigned int state,
656 unsigned int oldstate)
659 serial_txx9_initialize(port);
662 static int serial_txx9_request_resource(struct uart_txx9_port *up)
664 unsigned int size = TXX9_REGION_SIZE;
667 switch (up->port.iotype) {
669 if (!up->port.mapbase)
672 if (!request_mem_region(up->port.mapbase, size, "serial_txx9")) {
677 if (up->port.flags & UPF_IOREMAP) {
678 up->port.membase = ioremap(up->port.mapbase, size);
679 if (!up->port.membase) {
680 release_mem_region(up->port.mapbase, size);
687 if (!request_region(up->port.iobase, size, "serial_txx9"))
694 static void serial_txx9_release_resource(struct uart_txx9_port *up)
696 unsigned int size = TXX9_REGION_SIZE;
698 switch (up->port.iotype) {
700 if (!up->port.mapbase)
703 if (up->port.flags & UPF_IOREMAP) {
704 iounmap(up->port.membase);
705 up->port.membase = NULL;
708 release_mem_region(up->port.mapbase, size);
712 release_region(up->port.iobase, size);
717 static void serial_txx9_release_port(struct uart_port *port)
719 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
720 serial_txx9_release_resource(up);
723 static int serial_txx9_request_port(struct uart_port *port)
725 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
726 return serial_txx9_request_resource(up);
729 static void serial_txx9_config_port(struct uart_port *port, int uflags)
731 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
735 * Find the region that we can probe for. This in turn
736 * tells us whether we can probe for the type of port.
738 ret = serial_txx9_request_resource(up);
741 port->type = PORT_TXX9;
742 up->port.fifosize = TXX9_SIO_TX_FIFO;
744 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
745 if (up->port.line == up->port.cons->index)
748 serial_txx9_initialize(port);
752 serial_txx9_verify_port(struct uart_port *port, struct serial_struct *ser)
754 unsigned long new_port = ser->port;
755 if (HIGH_BITS_OFFSET)
756 new_port += (unsigned long)ser->port_high << HIGH_BITS_OFFSET;
757 if (ser->type != port->type ||
758 ser->irq != port->irq ||
759 ser->io_type != port->iotype ||
760 new_port != port->iobase ||
761 (unsigned long)ser->iomem_base != port->mapbase)
767 serial_txx9_type(struct uart_port *port)
772 static struct uart_ops serial_txx9_pops = {
773 .tx_empty = serial_txx9_tx_empty,
774 .set_mctrl = serial_txx9_set_mctrl,
775 .get_mctrl = serial_txx9_get_mctrl,
776 .stop_tx = serial_txx9_stop_tx,
777 .start_tx = serial_txx9_start_tx,
778 .stop_rx = serial_txx9_stop_rx,
779 .enable_ms = serial_txx9_enable_ms,
780 .break_ctl = serial_txx9_break_ctl,
781 .startup = serial_txx9_startup,
782 .shutdown = serial_txx9_shutdown,
783 .set_termios = serial_txx9_set_termios,
784 .pm = serial_txx9_pm,
785 .type = serial_txx9_type,
786 .release_port = serial_txx9_release_port,
787 .request_port = serial_txx9_request_port,
788 .config_port = serial_txx9_config_port,
789 .verify_port = serial_txx9_verify_port,
792 static struct uart_txx9_port serial_txx9_ports[UART_NR];
794 static void __init serial_txx9_register_ports(struct uart_driver *drv,
799 for (i = 0; i < UART_NR; i++) {
800 struct uart_txx9_port *up = &serial_txx9_ports[i];
803 up->port.ops = &serial_txx9_pops;
805 if (up->port.iobase || up->port.mapbase)
806 uart_add_one_port(drv, &up->port);
810 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
813 * Wait for transmitter & holding register to empty
815 static inline void wait_for_xmitr(struct uart_txx9_port *up)
817 unsigned int tmout = 10000;
819 /* Wait up to 10ms for the character(s) to be sent. */
821 !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS))
824 /* Wait up to 1s for flow control if necessary */
825 if (up->port.flags & UPF_CONS_FLOW) {
828 (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS))
833 static void serial_txx9_console_putchar(struct uart_port *port, int ch)
835 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
838 sio_out(up, TXX9_SITFIFO, ch);
842 * Print a string to the serial port trying not to disturb
843 * any possible real use of the port...
845 * The console_lock must be held when we get here.
848 serial_txx9_console_write(struct console *co, const char *s, unsigned int count)
850 struct uart_txx9_port *up = &serial_txx9_ports[co->index];
851 unsigned int ier, flcr;
854 * First save the UER then disable the interrupts
856 ier = sio_in(up, TXX9_SIDICR);
857 sio_out(up, TXX9_SIDICR, 0);
859 * Disable flow-control if enabled (and unnecessary)
861 flcr = sio_in(up, TXX9_SIFLCR);
862 if (!(up->port.flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES))
863 sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES);
865 uart_console_write(&up->port, s, count, serial_txx9_console_putchar);
868 * Finally, wait for transmitter to become empty
869 * and restore the IER
872 sio_out(up, TXX9_SIFLCR, flcr);
873 sio_out(up, TXX9_SIDICR, ier);
876 static int __init serial_txx9_console_setup(struct console *co, char *options)
878 struct uart_port *port;
879 struct uart_txx9_port *up;
886 * Check whether an invalid uart number has been specified, and
887 * if so, search for the first available port that does have
890 if (co->index >= UART_NR)
892 up = &serial_txx9_ports[co->index];
897 serial_txx9_initialize(&up->port);
900 uart_parse_options(options, &baud, &parity, &bits, &flow);
902 return uart_set_options(port, co, baud, parity, bits, flow);
905 static struct uart_driver serial_txx9_reg;
906 static struct console serial_txx9_console = {
907 .name = TXX9_TTY_NAME,
908 .write = serial_txx9_console_write,
909 .device = uart_console_device,
910 .setup = serial_txx9_console_setup,
911 .flags = CON_PRINTBUFFER,
913 .data = &serial_txx9_reg,
916 static int __init serial_txx9_console_init(void)
918 register_console(&serial_txx9_console);
921 console_initcall(serial_txx9_console_init);
923 #define SERIAL_TXX9_CONSOLE &serial_txx9_console
925 #define SERIAL_TXX9_CONSOLE NULL
928 static struct uart_driver serial_txx9_reg = {
929 .owner = THIS_MODULE,
930 .driver_name = "serial_txx9",
931 .dev_name = TXX9_TTY_NAME,
932 .major = TXX9_TTY_MAJOR,
933 .minor = TXX9_TTY_MINOR_START,
935 .cons = SERIAL_TXX9_CONSOLE,
938 int __init early_serial_txx9_setup(struct uart_port *port)
940 if (port->line >= ARRAY_SIZE(serial_txx9_ports))
943 serial_txx9_ports[port->line].port = *port;
944 serial_txx9_ports[port->line].port.ops = &serial_txx9_pops;
945 serial_txx9_ports[port->line].port.flags |= UPF_BOOT_AUTOCONF;
949 static DEFINE_MUTEX(serial_txx9_mutex);
952 * serial_txx9_register_port - register a serial port
953 * @port: serial port template
955 * Configure the serial port specified by the request.
957 * The port is then probed and if necessary the IRQ is autodetected
958 * If this fails an error is returned.
960 * On success the port is ready to use and the line number is returned.
962 static int __devinit serial_txx9_register_port(struct uart_port *port)
965 struct uart_txx9_port *uart;
968 mutex_lock(&serial_txx9_mutex);
969 for (i = 0; i < UART_NR; i++) {
970 uart = &serial_txx9_ports[i];
971 if (uart_match_port(&uart->port, port)) {
972 uart_remove_one_port(&serial_txx9_reg, &uart->port);
977 /* Find unused port */
978 for (i = 0; i < UART_NR; i++) {
979 uart = &serial_txx9_ports[i];
980 if (!(uart->port.iobase || uart->port.mapbase))
985 uart->port.iobase = port->iobase;
986 uart->port.membase = port->membase;
987 uart->port.irq = port->irq;
988 uart->port.uartclk = port->uartclk;
989 uart->port.iotype = port->iotype;
990 uart->port.flags = port->flags | UPF_BOOT_AUTOCONF;
991 uart->port.mapbase = port->mapbase;
993 uart->port.dev = port->dev;
994 ret = uart_add_one_port(&serial_txx9_reg, &uart->port);
996 ret = uart->port.line;
998 mutex_unlock(&serial_txx9_mutex);
1003 * serial_txx9_unregister_port - remove a txx9 serial port at runtime
1004 * @line: serial line number
1006 * Remove one serial port. This may not be called from interrupt
1007 * context. We hand the port back to the our control.
1009 static void __devexit serial_txx9_unregister_port(int line)
1011 struct uart_txx9_port *uart = &serial_txx9_ports[line];
1013 mutex_lock(&serial_txx9_mutex);
1014 uart_remove_one_port(&serial_txx9_reg, &uart->port);
1015 uart->port.flags = 0;
1016 uart->port.type = PORT_UNKNOWN;
1017 uart->port.iobase = 0;
1018 uart->port.mapbase = 0;
1019 uart->port.membase = NULL;
1020 uart->port.dev = NULL;
1021 mutex_unlock(&serial_txx9_mutex);
1025 * Register a set of serial devices attached to a platform device.
1027 static int __devinit serial_txx9_probe(struct platform_device *dev)
1029 struct uart_port *p = dev->dev.platform_data;
1030 struct uart_port port;
1033 memset(&port, 0, sizeof(struct uart_port));
1034 for (i = 0; p && p->uartclk != 0; p++, i++) {
1035 port.iobase = p->iobase;
1036 port.membase = p->membase;
1038 port.uartclk = p->uartclk;
1039 port.iotype = p->iotype;
1040 port.flags = p->flags;
1041 port.mapbase = p->mapbase;
1042 port.dev = &dev->dev;
1043 ret = serial_txx9_register_port(&port);
1045 dev_err(&dev->dev, "unable to register port at index %d "
1046 "(IO%x MEM%lx IRQ%d): %d\n", i,
1047 p->iobase, p->mapbase, p->irq, ret);
1054 * Remove serial ports registered against a platform device.
1056 static int __devexit serial_txx9_remove(struct platform_device *dev)
1060 for (i = 0; i < UART_NR; i++) {
1061 struct uart_txx9_port *up = &serial_txx9_ports[i];
1063 if (up->port.dev == &dev->dev)
1064 serial_txx9_unregister_port(i);
1070 static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state)
1074 for (i = 0; i < UART_NR; i++) {
1075 struct uart_txx9_port *up = &serial_txx9_ports[i];
1077 if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
1078 uart_suspend_port(&serial_txx9_reg, &up->port);
1084 static int serial_txx9_resume(struct platform_device *dev)
1088 for (i = 0; i < UART_NR; i++) {
1089 struct uart_txx9_port *up = &serial_txx9_ports[i];
1091 if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
1092 uart_resume_port(&serial_txx9_reg, &up->port);
1099 static struct platform_driver serial_txx9_plat_driver = {
1100 .probe = serial_txx9_probe,
1101 .remove = __devexit_p(serial_txx9_remove),
1103 .suspend = serial_txx9_suspend,
1104 .resume = serial_txx9_resume,
1107 .name = "serial_txx9",
1108 .owner = THIS_MODULE,
1112 #ifdef ENABLE_SERIAL_TXX9_PCI
1114 * Probe one serial board. Unfortunately, there is no rhyme nor reason
1115 * to the arrangement of serial ports on a PCI card.
1117 static int __devinit
1118 pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
1120 struct uart_port port;
1124 rc = pci_enable_device(dev);
1128 memset(&port, 0, sizeof(port));
1129 port.ops = &serial_txx9_pops;
1130 port.flags |= UPF_TXX9_HAVE_CTS_LINE;
1131 port.uartclk = 66670000;
1132 port.irq = dev->irq;
1133 port.iotype = UPIO_PORT;
1134 port.iobase = pci_resource_start(dev, 1);
1135 port.dev = &dev->dev;
1136 line = serial_txx9_register_port(&port);
1138 printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line);
1139 pci_disable_device(dev);
1142 pci_set_drvdata(dev, &serial_txx9_ports[line]);
1147 static void __devexit pciserial_txx9_remove_one(struct pci_dev *dev)
1149 struct uart_txx9_port *up = pci_get_drvdata(dev);
1151 pci_set_drvdata(dev, NULL);
1154 serial_txx9_unregister_port(up->port.line);
1155 pci_disable_device(dev);
1160 static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)
1162 struct uart_txx9_port *up = pci_get_drvdata(dev);
1165 uart_suspend_port(&serial_txx9_reg, &up->port);
1166 pci_save_state(dev);
1167 pci_set_power_state(dev, pci_choose_state(dev, state));
1171 static int pciserial_txx9_resume_one(struct pci_dev *dev)
1173 struct uart_txx9_port *up = pci_get_drvdata(dev);
1175 pci_set_power_state(dev, PCI_D0);
1176 pci_restore_state(dev);
1178 uart_resume_port(&serial_txx9_reg, &up->port);
1183 static const struct pci_device_id serial_txx9_pci_tbl[] = {
1184 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC) },
1188 static struct pci_driver serial_txx9_pci_driver = {
1189 .name = "serial_txx9",
1190 .probe = pciserial_txx9_init_one,
1191 .remove = __devexit_p(pciserial_txx9_remove_one),
1193 .suspend = pciserial_txx9_suspend_one,
1194 .resume = pciserial_txx9_resume_one,
1196 .id_table = serial_txx9_pci_tbl,
1199 MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl);
1200 #endif /* ENABLE_SERIAL_TXX9_PCI */
1202 static struct platform_device *serial_txx9_plat_devs;
1204 static int __init serial_txx9_init(void)
1208 printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
1210 ret = uart_register_driver(&serial_txx9_reg);
1214 serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1);
1215 if (!serial_txx9_plat_devs) {
1217 goto unreg_uart_drv;
1220 ret = platform_device_add(serial_txx9_plat_devs);
1224 serial_txx9_register_ports(&serial_txx9_reg,
1225 &serial_txx9_plat_devs->dev);
1227 ret = platform_driver_register(&serial_txx9_plat_driver);
1231 #ifdef ENABLE_SERIAL_TXX9_PCI
1232 ret = pci_register_driver(&serial_txx9_pci_driver);
1238 platform_device_del(serial_txx9_plat_devs);
1240 platform_device_put(serial_txx9_plat_devs);
1242 uart_unregister_driver(&serial_txx9_reg);
1247 static void __exit serial_txx9_exit(void)
1251 #ifdef ENABLE_SERIAL_TXX9_PCI
1252 pci_unregister_driver(&serial_txx9_pci_driver);
1254 platform_driver_unregister(&serial_txx9_plat_driver);
1255 platform_device_unregister(serial_txx9_plat_devs);
1256 for (i = 0; i < UART_NR; i++) {
1257 struct uart_txx9_port *up = &serial_txx9_ports[i];
1258 if (up->port.iobase || up->port.mapbase)
1259 uart_remove_one_port(&serial_txx9_reg, &up->port);
1262 uart_unregister_driver(&serial_txx9_reg);
1265 module_init(serial_txx9_init);
1266 module_exit(serial_txx9_exit);
1268 MODULE_LICENSE("GPL");
1269 MODULE_DESCRIPTION("TX39/49 serial driver");
1271 MODULE_ALIAS_CHARDEV_MAJOR(TXX9_TTY_MAJOR);