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/delay.h>
29 #include <linux/platform_device.h>
30 #include <linux/pci.h>
31 #include <linux/serial_core.h>
32 #include <linux/serial.h>
36 static char *serial_version = "1.11";
37 static char *serial_name = "TX39/49 Serial driver";
39 #define PASS_LIMIT 256
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
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
54 #define UPF_TXX9_HAVE_CTS_LINE UPF_BUGGY_UART
55 #define UPF_TXX9_USE_SCLK UPF_MAGIC_MULTIPLIER
58 /* support for Toshiba TC86C001 SIO */
59 #define ENABLE_SERIAL_TXX9_PCI
63 * Number of serial ports
65 #define UART_NR CONFIG_SERIAL_TXX9_NR_UARTS
67 struct uart_txx9_port {
68 struct uart_port port;
69 /* No additional info for now */
72 #define TXX9_REGION_SIZE 0x24
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
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
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
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
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
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
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
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
174 static inline unsigned int sio_in(struct uart_txx9_port *up, int offset)
176 switch (up->port.iotype) {
178 return __raw_readl(up->port.membase + offset);
180 return inl(up->port.iobase + offset);
185 sio_out(struct uart_txx9_port *up, int offset, int value)
187 switch (up->port.iotype) {
189 __raw_writel(value, up->port.membase + offset);
192 outl(value, up->port.iobase + offset);
198 sio_mask(struct uart_txx9_port *up, int offset, unsigned int value)
200 sio_out(up, offset, sio_in(up, offset) & ~value);
203 sio_set(struct uart_txx9_port *up, int offset, unsigned int value)
205 sio_out(up, offset, sio_in(up, offset) | value);
209 sio_quot_set(struct uart_txx9_port *up, int quot)
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);
221 sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6);
224 static void serial_txx9_stop_tx(struct uart_port *port)
226 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
227 sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
230 static void serial_txx9_start_tx(struct uart_port *port)
232 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
233 sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
236 static void serial_txx9_stop_rx(struct uart_port *port)
238 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
239 up->port.read_status_mask &= ~TXX9_SIDISR_RDIS;
242 static void serial_txx9_enable_ms(struct uart_port *port)
244 /* TXX9-SIO can not control DTR... */
247 static void serial_txx9_initialize(struct uart_port *port)
249 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
250 unsigned int tmout = 10000;
252 sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST);
253 /* TX4925 BUG WORKAROUND. Accessing SIOC register
254 * immediately after soft reset causes bus error. */
257 while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout)
259 /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
260 sio_set(up, TXX9_SIFCR,
261 TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1);
262 /* initial settings */
263 sio_out(up, TXX9_SILCR,
264 TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
265 ((up->port.flags & UPF_TXX9_USE_SCLK) ?
266 TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
267 sio_quot_set(up, uart_get_divisor(port, 9600));
268 sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
269 sio_out(up, TXX9_SIDICR, 0);
273 receive_chars(struct uart_txx9_port *up, unsigned int *status)
275 struct tty_struct *tty = up->port.info->tty;
277 unsigned int disr = *status;
280 unsigned int next_ignore_status_mask;
283 ch = sio_in(up, TXX9_SIRFIFO);
285 up->port.icount.rx++;
287 /* mask out RFDN_MASK bit added by previous overrun */
288 next_ignore_status_mask =
289 up->port.ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK;
290 if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER |
291 TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) {
293 * For statistics only
295 if (disr & TXX9_SIDISR_UBRK) {
296 disr &= ~(TXX9_SIDISR_UFER | TXX9_SIDISR_UPER);
297 up->port.icount.brk++;
299 * We do the SysRQ and SAK checking
300 * here because otherwise the break
301 * may get masked by ignore_status_mask
302 * or read_status_mask.
304 if (uart_handle_break(&up->port))
306 } else if (disr & TXX9_SIDISR_UPER)
307 up->port.icount.parity++;
308 else if (disr & TXX9_SIDISR_UFER)
309 up->port.icount.frame++;
310 if (disr & TXX9_SIDISR_UOER) {
311 up->port.icount.overrun++;
313 * The receiver read buffer still hold
314 * a char which caused overrun.
315 * Ignore next char by adding RFDN_MASK
316 * to ignore_status_mask temporarily.
318 next_ignore_status_mask |=
319 TXX9_SIDISR_RFDN_MASK;
323 * Mask off conditions which should be ingored.
325 disr &= up->port.read_status_mask;
327 if (disr & TXX9_SIDISR_UBRK) {
329 } else if (disr & TXX9_SIDISR_UPER)
331 else if (disr & TXX9_SIDISR_UFER)
334 if (uart_handle_sysrq_char(&up->port, ch))
337 uart_insert_char(&up->port, disr, TXX9_SIDISR_UOER, ch, flag);
340 up->port.ignore_status_mask = next_ignore_status_mask;
341 disr = sio_in(up, TXX9_SIDISR);
342 } while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0));
343 spin_unlock(&up->port.lock);
344 tty_flip_buffer_push(tty);
345 spin_lock(&up->port.lock);
349 static inline void transmit_chars(struct uart_txx9_port *up)
351 struct circ_buf *xmit = &up->port.info->xmit;
354 if (up->port.x_char) {
355 sio_out(up, TXX9_SITFIFO, up->port.x_char);
356 up->port.icount.tx++;
360 if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
361 serial_txx9_stop_tx(&up->port);
365 count = TXX9_SIO_TX_FIFO;
367 sio_out(up, TXX9_SITFIFO, xmit->buf[xmit->tail]);
368 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
369 up->port.icount.tx++;
370 if (uart_circ_empty(xmit))
372 } while (--count > 0);
374 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
375 uart_write_wakeup(&up->port);
377 if (uart_circ_empty(xmit))
378 serial_txx9_stop_tx(&up->port);
381 static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id)
383 int pass_counter = 0;
384 struct uart_txx9_port *up = dev_id;
388 spin_lock(&up->port.lock);
389 status = sio_in(up, TXX9_SIDISR);
390 if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE))
391 status &= ~TXX9_SIDISR_TDIS;
392 if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
393 TXX9_SIDISR_TOUT))) {
394 spin_unlock(&up->port.lock);
398 if (status & TXX9_SIDISR_RDIS)
399 receive_chars(up, &status);
400 if (status & TXX9_SIDISR_TDIS)
402 /* Clear TX/RX Int. Status */
403 sio_mask(up, TXX9_SIDISR,
404 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
406 spin_unlock(&up->port.lock);
408 if (pass_counter++ > PASS_LIMIT)
412 return pass_counter ? IRQ_HANDLED : IRQ_NONE;
415 static unsigned int serial_txx9_tx_empty(struct uart_port *port)
417 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
421 spin_lock_irqsave(&up->port.lock, flags);
422 ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0;
423 spin_unlock_irqrestore(&up->port.lock, flags);
428 static unsigned int serial_txx9_get_mctrl(struct uart_port *port)
430 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
433 /* no modem control lines */
434 ret = TIOCM_CAR | TIOCM_DSR;
435 ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS;
436 ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS;
441 static void serial_txx9_set_mctrl(struct uart_port *port, unsigned int mctrl)
443 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
445 if (mctrl & TIOCM_RTS)
446 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
448 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
451 static void serial_txx9_break_ctl(struct uart_port *port, int break_state)
453 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
456 spin_lock_irqsave(&up->port.lock, flags);
457 if (break_state == -1)
458 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
460 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
461 spin_unlock_irqrestore(&up->port.lock, flags);
464 static int serial_txx9_startup(struct uart_port *port)
466 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
471 * Clear the FIFO buffers and disable them.
472 * (they will be reenabled in set_termios())
474 sio_set(up, TXX9_SIFCR,
475 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
477 sio_mask(up, TXX9_SIFCR,
478 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
479 sio_out(up, TXX9_SIDICR, 0);
482 * Clear the interrupt registers.
484 sio_out(up, TXX9_SIDISR, 0);
486 retval = request_irq(up->port.irq, serial_txx9_interrupt,
487 IRQF_SHARED, "serial_txx9", up);
492 * Now, initialize the UART
494 spin_lock_irqsave(&up->port.lock, flags);
495 serial_txx9_set_mctrl(&up->port, up->port.mctrl);
496 spin_unlock_irqrestore(&up->port.lock, flags);
499 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
502 * Finally, enable interrupts.
504 sio_set(up, TXX9_SIDICR, TXX9_SIDICR_RIE);
509 static void serial_txx9_shutdown(struct uart_port *port)
511 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
515 * Disable interrupts from this port
517 sio_out(up, TXX9_SIDICR, 0); /* disable all intrs */
519 spin_lock_irqsave(&up->port.lock, flags);
520 serial_txx9_set_mctrl(&up->port, up->port.mctrl);
521 spin_unlock_irqrestore(&up->port.lock, flags);
524 * Disable break condition
526 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
528 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
529 if (up->port.cons && up->port.line == up->port.cons->index) {
530 free_irq(up->port.irq, up);
535 sio_set(up, TXX9_SIFCR,
536 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
538 sio_mask(up, TXX9_SIFCR,
539 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
542 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
544 free_irq(up->port.irq, up);
548 serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios,
549 struct ktermios *old)
551 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
552 unsigned int cval, fcr = 0;
554 unsigned int baud, quot;
557 * We don't support modem control lines.
559 termios->c_cflag &= ~(HUPCL | CMSPAR);
560 termios->c_cflag |= CLOCAL;
562 cval = sio_in(up, TXX9_SILCR);
563 /* byte size and parity */
564 cval &= ~TXX9_SILCR_UMODE_MASK;
565 switch (termios->c_cflag & CSIZE) {
567 cval |= TXX9_SILCR_UMODE_7BIT;
570 case CS5: /* not supported */
571 case CS6: /* not supported */
573 cval |= TXX9_SILCR_UMODE_8BIT;
577 cval &= ~TXX9_SILCR_USBL_MASK;
578 if (termios->c_cflag & CSTOPB)
579 cval |= TXX9_SILCR_USBL_2BIT;
581 cval |= TXX9_SILCR_USBL_1BIT;
582 cval &= ~(TXX9_SILCR_UPEN | TXX9_SILCR_UEPS);
583 if (termios->c_cflag & PARENB)
584 cval |= TXX9_SILCR_UPEN;
585 if (!(termios->c_cflag & PARODD))
586 cval |= TXX9_SILCR_UEPS;
589 * Ask the core to calculate the divisor for us.
591 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16/2);
592 quot = uart_get_divisor(port, baud);
595 /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
596 fcr = TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1;
599 * Ok, we're now changing the port state. Do it with
600 * interrupts disabled.
602 spin_lock_irqsave(&up->port.lock, flags);
605 * Update the per-port timeout.
607 uart_update_timeout(port, termios->c_cflag, baud);
609 up->port.read_status_mask = TXX9_SIDISR_UOER |
610 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS;
611 if (termios->c_iflag & INPCK)
612 up->port.read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER;
613 if (termios->c_iflag & (BRKINT | PARMRK))
614 up->port.read_status_mask |= TXX9_SIDISR_UBRK;
617 * Characteres to ignore
619 up->port.ignore_status_mask = 0;
620 if (termios->c_iflag & IGNPAR)
621 up->port.ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER;
622 if (termios->c_iflag & IGNBRK) {
623 up->port.ignore_status_mask |= TXX9_SIDISR_UBRK;
625 * If we're ignoring parity and break indicators,
626 * ignore overruns too (for real raw support).
628 if (termios->c_iflag & IGNPAR)
629 up->port.ignore_status_mask |= TXX9_SIDISR_UOER;
633 * ignore all characters if CREAD is not set
635 if ((termios->c_cflag & CREAD) == 0)
636 up->port.ignore_status_mask |= TXX9_SIDISR_RDIS;
638 /* CTS flow control flag */
639 if ((termios->c_cflag & CRTSCTS) &&
640 (up->port.flags & UPF_TXX9_HAVE_CTS_LINE)) {
641 sio_set(up, TXX9_SIFLCR,
642 TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
644 sio_mask(up, TXX9_SIFLCR,
645 TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
648 sio_out(up, TXX9_SILCR, cval);
649 sio_quot_set(up, quot);
650 sio_out(up, TXX9_SIFCR, fcr);
652 serial_txx9_set_mctrl(&up->port, up->port.mctrl);
653 spin_unlock_irqrestore(&up->port.lock, flags);
657 serial_txx9_pm(struct uart_port *port, unsigned int state,
658 unsigned int oldstate)
661 * If oldstate was -1 this is called from
662 * uart_configure_port(). In this case do not initialize the
663 * port now, because the port was already initialized (for
664 * non-console port) or should not be initialized here (for
665 * console port). If we initialized the port here we lose
666 * serial console settings.
668 if (state == 0 && oldstate != -1)
669 serial_txx9_initialize(port);
672 static int serial_txx9_request_resource(struct uart_txx9_port *up)
674 unsigned int size = TXX9_REGION_SIZE;
677 switch (up->port.iotype) {
679 if (!up->port.mapbase)
682 if (!request_mem_region(up->port.mapbase, size, "serial_txx9")) {
687 if (up->port.flags & UPF_IOREMAP) {
688 up->port.membase = ioremap(up->port.mapbase, size);
689 if (!up->port.membase) {
690 release_mem_region(up->port.mapbase, size);
697 if (!request_region(up->port.iobase, size, "serial_txx9"))
704 static void serial_txx9_release_resource(struct uart_txx9_port *up)
706 unsigned int size = TXX9_REGION_SIZE;
708 switch (up->port.iotype) {
710 if (!up->port.mapbase)
713 if (up->port.flags & UPF_IOREMAP) {
714 iounmap(up->port.membase);
715 up->port.membase = NULL;
718 release_mem_region(up->port.mapbase, size);
722 release_region(up->port.iobase, size);
727 static void serial_txx9_release_port(struct uart_port *port)
729 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
730 serial_txx9_release_resource(up);
733 static int serial_txx9_request_port(struct uart_port *port)
735 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
736 return serial_txx9_request_resource(up);
739 static void serial_txx9_config_port(struct uart_port *port, int uflags)
741 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
745 * Find the region that we can probe for. This in turn
746 * tells us whether we can probe for the type of port.
748 ret = serial_txx9_request_resource(up);
751 port->type = PORT_TXX9;
752 up->port.fifosize = TXX9_SIO_TX_FIFO;
754 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
755 if (up->port.line == up->port.cons->index)
758 serial_txx9_initialize(port);
762 serial_txx9_type(struct uart_port *port)
767 static struct uart_ops serial_txx9_pops = {
768 .tx_empty = serial_txx9_tx_empty,
769 .set_mctrl = serial_txx9_set_mctrl,
770 .get_mctrl = serial_txx9_get_mctrl,
771 .stop_tx = serial_txx9_stop_tx,
772 .start_tx = serial_txx9_start_tx,
773 .stop_rx = serial_txx9_stop_rx,
774 .enable_ms = serial_txx9_enable_ms,
775 .break_ctl = serial_txx9_break_ctl,
776 .startup = serial_txx9_startup,
777 .shutdown = serial_txx9_shutdown,
778 .set_termios = serial_txx9_set_termios,
779 .pm = serial_txx9_pm,
780 .type = serial_txx9_type,
781 .release_port = serial_txx9_release_port,
782 .request_port = serial_txx9_request_port,
783 .config_port = serial_txx9_config_port,
786 static struct uart_txx9_port serial_txx9_ports[UART_NR];
788 static void __init serial_txx9_register_ports(struct uart_driver *drv,
793 for (i = 0; i < UART_NR; i++) {
794 struct uart_txx9_port *up = &serial_txx9_ports[i];
797 up->port.ops = &serial_txx9_pops;
799 if (up->port.iobase || up->port.mapbase)
800 uart_add_one_port(drv, &up->port);
804 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
807 * Wait for transmitter & holding register to empty
809 static inline void wait_for_xmitr(struct uart_txx9_port *up)
811 unsigned int tmout = 10000;
813 /* Wait up to 10ms for the character(s) to be sent. */
815 !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS))
818 /* Wait up to 1s for flow control if necessary */
819 if (up->port.flags & UPF_CONS_FLOW) {
822 (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS))
827 static void serial_txx9_console_putchar(struct uart_port *port, int ch)
829 struct uart_txx9_port *up = (struct uart_txx9_port *)port;
832 sio_out(up, TXX9_SITFIFO, ch);
836 * Print a string to the serial port trying not to disturb
837 * any possible real use of the port...
839 * The console_lock must be held when we get here.
842 serial_txx9_console_write(struct console *co, const char *s, unsigned int count)
844 struct uart_txx9_port *up = &serial_txx9_ports[co->index];
845 unsigned int ier, flcr;
848 * First save the UER then disable the interrupts
850 ier = sio_in(up, TXX9_SIDICR);
851 sio_out(up, TXX9_SIDICR, 0);
853 * Disable flow-control if enabled (and unnecessary)
855 flcr = sio_in(up, TXX9_SIFLCR);
856 if (!(up->port.flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES))
857 sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES);
859 uart_console_write(&up->port, s, count, serial_txx9_console_putchar);
862 * Finally, wait for transmitter to become empty
863 * and restore the IER
866 sio_out(up, TXX9_SIFLCR, flcr);
867 sio_out(up, TXX9_SIDICR, ier);
870 static int __init serial_txx9_console_setup(struct console *co, char *options)
872 struct uart_port *port;
873 struct uart_txx9_port *up;
880 * Check whether an invalid uart number has been specified, and
881 * if so, search for the first available port that does have
884 if (co->index >= UART_NR)
886 up = &serial_txx9_ports[co->index];
891 serial_txx9_initialize(&up->port);
894 uart_parse_options(options, &baud, &parity, &bits, &flow);
896 return uart_set_options(port, co, baud, parity, bits, flow);
899 static struct uart_driver serial_txx9_reg;
900 static struct console serial_txx9_console = {
901 .name = TXX9_TTY_NAME,
902 .write = serial_txx9_console_write,
903 .device = uart_console_device,
904 .setup = serial_txx9_console_setup,
905 .flags = CON_PRINTBUFFER,
907 .data = &serial_txx9_reg,
910 static int __init serial_txx9_console_init(void)
912 register_console(&serial_txx9_console);
915 console_initcall(serial_txx9_console_init);
917 #define SERIAL_TXX9_CONSOLE &serial_txx9_console
919 #define SERIAL_TXX9_CONSOLE NULL
922 static struct uart_driver serial_txx9_reg = {
923 .owner = THIS_MODULE,
924 .driver_name = "serial_txx9",
925 .dev_name = TXX9_TTY_NAME,
926 .major = TXX9_TTY_MAJOR,
927 .minor = TXX9_TTY_MINOR_START,
929 .cons = SERIAL_TXX9_CONSOLE,
932 int __init early_serial_txx9_setup(struct uart_port *port)
934 if (port->line >= ARRAY_SIZE(serial_txx9_ports))
937 serial_txx9_ports[port->line].port = *port;
938 serial_txx9_ports[port->line].port.ops = &serial_txx9_pops;
939 serial_txx9_ports[port->line].port.flags |=
940 UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
944 static DEFINE_MUTEX(serial_txx9_mutex);
947 * serial_txx9_register_port - register a serial port
948 * @port: serial port template
950 * Configure the serial port specified by the request.
952 * The port is then probed and if necessary the IRQ is autodetected
953 * If this fails an error is returned.
955 * On success the port is ready to use and the line number is returned.
957 static int __devinit serial_txx9_register_port(struct uart_port *port)
960 struct uart_txx9_port *uart;
963 mutex_lock(&serial_txx9_mutex);
964 for (i = 0; i < UART_NR; i++) {
965 uart = &serial_txx9_ports[i];
966 if (uart_match_port(&uart->port, port)) {
967 uart_remove_one_port(&serial_txx9_reg, &uart->port);
972 /* Find unused port */
973 for (i = 0; i < UART_NR; i++) {
974 uart = &serial_txx9_ports[i];
975 if (!(uart->port.iobase || uart->port.mapbase))
980 uart->port.iobase = port->iobase;
981 uart->port.membase = port->membase;
982 uart->port.irq = port->irq;
983 uart->port.uartclk = port->uartclk;
984 uart->port.iotype = port->iotype;
985 uart->port.flags = port->flags
986 | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
987 uart->port.mapbase = port->mapbase;
989 uart->port.dev = port->dev;
990 ret = uart_add_one_port(&serial_txx9_reg, &uart->port);
992 ret = uart->port.line;
994 mutex_unlock(&serial_txx9_mutex);
999 * serial_txx9_unregister_port - remove a txx9 serial port at runtime
1000 * @line: serial line number
1002 * Remove one serial port. This may not be called from interrupt
1003 * context. We hand the port back to the our control.
1005 static void __devexit serial_txx9_unregister_port(int line)
1007 struct uart_txx9_port *uart = &serial_txx9_ports[line];
1009 mutex_lock(&serial_txx9_mutex);
1010 uart_remove_one_port(&serial_txx9_reg, &uart->port);
1011 uart->port.flags = 0;
1012 uart->port.type = PORT_UNKNOWN;
1013 uart->port.iobase = 0;
1014 uart->port.mapbase = 0;
1015 uart->port.membase = NULL;
1016 uart->port.dev = NULL;
1017 mutex_unlock(&serial_txx9_mutex);
1021 * Register a set of serial devices attached to a platform device.
1023 static int __devinit serial_txx9_probe(struct platform_device *dev)
1025 struct uart_port *p = dev->dev.platform_data;
1026 struct uart_port port;
1029 memset(&port, 0, sizeof(struct uart_port));
1030 for (i = 0; p && p->uartclk != 0; p++, i++) {
1031 port.iobase = p->iobase;
1032 port.membase = p->membase;
1034 port.uartclk = p->uartclk;
1035 port.iotype = p->iotype;
1036 port.flags = p->flags;
1037 port.mapbase = p->mapbase;
1038 port.dev = &dev->dev;
1039 ret = serial_txx9_register_port(&port);
1041 dev_err(&dev->dev, "unable to register port at index %d "
1042 "(IO%x MEM%llx IRQ%d): %d\n", i,
1043 p->iobase, (unsigned long long)p->mapbase,
1051 * Remove serial ports registered against a platform device.
1053 static int __devexit serial_txx9_remove(struct platform_device *dev)
1057 for (i = 0; i < UART_NR; i++) {
1058 struct uart_txx9_port *up = &serial_txx9_ports[i];
1060 if (up->port.dev == &dev->dev)
1061 serial_txx9_unregister_port(i);
1067 static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state)
1071 for (i = 0; i < UART_NR; i++) {
1072 struct uart_txx9_port *up = &serial_txx9_ports[i];
1074 if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
1075 uart_suspend_port(&serial_txx9_reg, &up->port);
1081 static int serial_txx9_resume(struct platform_device *dev)
1085 for (i = 0; i < UART_NR; i++) {
1086 struct uart_txx9_port *up = &serial_txx9_ports[i];
1088 if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
1089 uart_resume_port(&serial_txx9_reg, &up->port);
1096 static struct platform_driver serial_txx9_plat_driver = {
1097 .probe = serial_txx9_probe,
1098 .remove = __devexit_p(serial_txx9_remove),
1100 .suspend = serial_txx9_suspend,
1101 .resume = serial_txx9_resume,
1104 .name = "serial_txx9",
1105 .owner = THIS_MODULE,
1109 #ifdef ENABLE_SERIAL_TXX9_PCI
1111 * Probe one serial board. Unfortunately, there is no rhyme nor reason
1112 * to the arrangement of serial ports on a PCI card.
1114 static int __devinit
1115 pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
1117 struct uart_port port;
1121 rc = pci_enable_device(dev);
1125 memset(&port, 0, sizeof(port));
1126 port.ops = &serial_txx9_pops;
1127 port.flags |= UPF_TXX9_HAVE_CTS_LINE;
1128 port.uartclk = 66670000;
1129 port.irq = dev->irq;
1130 port.iotype = UPIO_PORT;
1131 port.iobase = pci_resource_start(dev, 1);
1132 port.dev = &dev->dev;
1133 line = serial_txx9_register_port(&port);
1135 printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line);
1136 pci_disable_device(dev);
1139 pci_set_drvdata(dev, &serial_txx9_ports[line]);
1144 static void __devexit pciserial_txx9_remove_one(struct pci_dev *dev)
1146 struct uart_txx9_port *up = pci_get_drvdata(dev);
1148 pci_set_drvdata(dev, NULL);
1151 serial_txx9_unregister_port(up->port.line);
1152 pci_disable_device(dev);
1157 static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)
1159 struct uart_txx9_port *up = pci_get_drvdata(dev);
1162 uart_suspend_port(&serial_txx9_reg, &up->port);
1163 pci_save_state(dev);
1164 pci_set_power_state(dev, pci_choose_state(dev, state));
1168 static int pciserial_txx9_resume_one(struct pci_dev *dev)
1170 struct uart_txx9_port *up = pci_get_drvdata(dev);
1172 pci_set_power_state(dev, PCI_D0);
1173 pci_restore_state(dev);
1175 uart_resume_port(&serial_txx9_reg, &up->port);
1180 static const struct pci_device_id serial_txx9_pci_tbl[] = {
1181 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC) },
1185 static struct pci_driver serial_txx9_pci_driver = {
1186 .name = "serial_txx9",
1187 .probe = pciserial_txx9_init_one,
1188 .remove = __devexit_p(pciserial_txx9_remove_one),
1190 .suspend = pciserial_txx9_suspend_one,
1191 .resume = pciserial_txx9_resume_one,
1193 .id_table = serial_txx9_pci_tbl,
1196 MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl);
1197 #endif /* ENABLE_SERIAL_TXX9_PCI */
1199 static struct platform_device *serial_txx9_plat_devs;
1201 static int __init serial_txx9_init(void)
1205 printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
1207 ret = uart_register_driver(&serial_txx9_reg);
1211 serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1);
1212 if (!serial_txx9_plat_devs) {
1214 goto unreg_uart_drv;
1217 ret = platform_device_add(serial_txx9_plat_devs);
1221 serial_txx9_register_ports(&serial_txx9_reg,
1222 &serial_txx9_plat_devs->dev);
1224 ret = platform_driver_register(&serial_txx9_plat_driver);
1228 #ifdef ENABLE_SERIAL_TXX9_PCI
1229 ret = pci_register_driver(&serial_txx9_pci_driver);
1235 platform_device_del(serial_txx9_plat_devs);
1237 platform_device_put(serial_txx9_plat_devs);
1239 uart_unregister_driver(&serial_txx9_reg);
1244 static void __exit serial_txx9_exit(void)
1248 #ifdef ENABLE_SERIAL_TXX9_PCI
1249 pci_unregister_driver(&serial_txx9_pci_driver);
1251 platform_driver_unregister(&serial_txx9_plat_driver);
1252 platform_device_unregister(serial_txx9_plat_devs);
1253 for (i = 0; i < UART_NR; i++) {
1254 struct uart_txx9_port *up = &serial_txx9_ports[i];
1255 if (up->port.iobase || up->port.mapbase)
1256 uart_remove_one_port(&serial_txx9_reg, &up->port);
1259 uart_unregister_driver(&serial_txx9_reg);
1262 module_init(serial_txx9_init);
1263 module_exit(serial_txx9_exit);
1265 MODULE_LICENSE("GPL");
1266 MODULE_DESCRIPTION("TX39/49 serial driver");
1268 MODULE_ALIAS_CHARDEV_MAJOR(TXX9_TTY_MAJOR);