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.
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
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.
15 * Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller
18 #if defined(CONFIG_SERIAL_TXX9_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
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>
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_1 0x00000000
146 #define TXX9_SIFCR_TDIL_4 0x00000001
147 #define TXX9_SIFCR_TDIL_8 0x00000010
148 #define TXX9_SIFCR_TDIL_MAX 0x00000010
149 #define TXX9_SIFCR_TFRST 0x00000004
150 #define TXX9_SIFCR_RFRST 0x00000002
151 #define TXX9_SIFCR_FRSTE 0x00000001
152 #define TXX9_SIO_TX_FIFO 8
153 #define TXX9_SIO_RX_FIFO 16
155 /* SIFLCR : Flow Control */
156 #define TXX9_SIFLCR_RCS 0x00001000
157 #define TXX9_SIFLCR_TES 0x00000800
158 #define TXX9_SIFLCR_RTSSC 0x00000200
159 #define TXX9_SIFLCR_RSDE 0x00000100
160 #define TXX9_SIFLCR_TSDE 0x00000080
161 #define TXX9_SIFLCR_RTSTL_MASK 0x0000001e
162 #define TXX9_SIFLCR_RTSTL_MAX 0x0000001e
163 #define TXX9_SIFLCR_TBRK 0x00000001
165 /* SIBGR : Baudrate Control */
166 #define TXX9_SIBGR_BCLK_MASK 0x00000300
167 #define TXX9_SIBGR_BCLK_T0 0x00000000
168 #define TXX9_SIBGR_BCLK_T2 0x00000100
169 #define TXX9_SIBGR_BCLK_T4 0x00000200
170 #define TXX9_SIBGR_BCLK_T6 0x00000300
171 #define TXX9_SIBGR_BRD_MASK 0x000000ff
173 static inline unsigned int sio_in(struct uart_txx9_port *up, int offset)
175 switch (up->port.iotype) {
177 return __raw_readl(up->port.membase + offset);
179 return inl(up->port.iobase + offset);
184 sio_out(struct uart_txx9_port *up, int offset, int value)
186 switch (up->port.iotype) {
188 __raw_writel(value, up->port.membase + offset);
191 outl(value, up->port.iobase + offset);
197 sio_mask(struct uart_txx9_port *up, int offset, unsigned int value)
199 sio_out(up, offset, sio_in(up, offset) & ~value);
202 sio_set(struct uart_txx9_port *up, int offset, unsigned int value)
204 sio_out(up, offset, sio_in(up, offset) | value);
208 sio_quot_set(struct uart_txx9_port *up, int quot)
212 sio_out(up, TXX9_SIBGR, quot | TXX9_SIBGR_BCLK_T0);
213 else if (quot < (256 << 2))
214 sio_out(up, TXX9_SIBGR, (quot >> 2) | TXX9_SIBGR_BCLK_T2);
215 else if (quot < (256 << 4))
216 sio_out(up, TXX9_SIBGR, (quot >> 4) | TXX9_SIBGR_BCLK_T4);
217 else if (quot < (256 << 6))
218 sio_out(up, TXX9_SIBGR, (quot >> 6) | TXX9_SIBGR_BCLK_T6);
220 sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6);
223 static struct uart_txx9_port *to_uart_txx9_port(struct uart_port *port)
225 return container_of(port, struct uart_txx9_port, port);
228 static void serial_txx9_stop_tx(struct uart_port *port)
230 struct uart_txx9_port *up = to_uart_txx9_port(port);
231 sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
234 static void serial_txx9_start_tx(struct uart_port *port)
236 struct uart_txx9_port *up = to_uart_txx9_port(port);
237 sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE);
240 static void serial_txx9_stop_rx(struct uart_port *port)
242 struct uart_txx9_port *up = to_uart_txx9_port(port);
243 up->port.read_status_mask &= ~TXX9_SIDISR_RDIS;
246 static void serial_txx9_initialize(struct uart_port *port)
248 struct uart_txx9_port *up = to_uart_txx9_port(port);
249 unsigned int tmout = 10000;
251 sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST);
252 /* TX4925 BUG WORKAROUND. Accessing SIOC register
253 * immediately after soft reset causes bus error. */
256 while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout)
258 /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
259 sio_set(up, TXX9_SIFCR,
260 TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1);
261 /* initial settings */
262 sio_out(up, TXX9_SILCR,
263 TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT |
264 ((up->port.flags & UPF_TXX9_USE_SCLK) ?
265 TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG));
266 sio_quot_set(up, uart_get_divisor(port, 9600));
267 sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */);
268 sio_out(up, TXX9_SIDICR, 0);
272 receive_chars(struct uart_txx9_port *up, unsigned int *status)
275 unsigned int disr = *status;
278 unsigned int next_ignore_status_mask;
281 ch = sio_in(up, TXX9_SIRFIFO);
283 up->port.icount.rx++;
285 /* mask out RFDN_MASK bit added by previous overrun */
286 next_ignore_status_mask =
287 up->port.ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK;
288 if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER |
289 TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) {
291 * For statistics only
293 if (disr & TXX9_SIDISR_UBRK) {
294 disr &= ~(TXX9_SIDISR_UFER | TXX9_SIDISR_UPER);
295 up->port.icount.brk++;
297 * We do the SysRQ and SAK checking
298 * here because otherwise the break
299 * may get masked by ignore_status_mask
300 * or read_status_mask.
302 if (uart_handle_break(&up->port))
304 } else if (disr & TXX9_SIDISR_UPER)
305 up->port.icount.parity++;
306 else if (disr & TXX9_SIDISR_UFER)
307 up->port.icount.frame++;
308 if (disr & TXX9_SIDISR_UOER) {
309 up->port.icount.overrun++;
311 * The receiver read buffer still hold
312 * a char which caused overrun.
313 * Ignore next char by adding RFDN_MASK
314 * to ignore_status_mask temporarily.
316 next_ignore_status_mask |=
317 TXX9_SIDISR_RFDN_MASK;
321 * Mask off conditions which should be ingored.
323 disr &= up->port.read_status_mask;
325 if (disr & TXX9_SIDISR_UBRK) {
327 } else if (disr & TXX9_SIDISR_UPER)
329 else if (disr & TXX9_SIDISR_UFER)
332 if (uart_handle_sysrq_char(&up->port, ch))
335 uart_insert_char(&up->port, disr, TXX9_SIDISR_UOER, ch, flag);
338 up->port.ignore_status_mask = next_ignore_status_mask;
339 disr = sio_in(up, TXX9_SIDISR);
340 } while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0));
341 spin_unlock(&up->port.lock);
342 tty_flip_buffer_push(&up->port.state->port);
343 spin_lock(&up->port.lock);
347 static inline void transmit_chars(struct uart_txx9_port *up)
349 struct circ_buf *xmit = &up->port.state->xmit;
352 if (up->port.x_char) {
353 sio_out(up, TXX9_SITFIFO, up->port.x_char);
354 up->port.icount.tx++;
358 if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
359 serial_txx9_stop_tx(&up->port);
363 count = TXX9_SIO_TX_FIFO;
365 sio_out(up, TXX9_SITFIFO, xmit->buf[xmit->tail]);
366 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
367 up->port.icount.tx++;
368 if (uart_circ_empty(xmit))
370 } while (--count > 0);
372 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
373 uart_write_wakeup(&up->port);
375 if (uart_circ_empty(xmit))
376 serial_txx9_stop_tx(&up->port);
379 static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id)
381 int pass_counter = 0;
382 struct uart_txx9_port *up = dev_id;
386 spin_lock(&up->port.lock);
387 status = sio_in(up, TXX9_SIDISR);
388 if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE))
389 status &= ~TXX9_SIDISR_TDIS;
390 if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
391 TXX9_SIDISR_TOUT))) {
392 spin_unlock(&up->port.lock);
396 if (status & TXX9_SIDISR_RDIS)
397 receive_chars(up, &status);
398 if (status & TXX9_SIDISR_TDIS)
400 /* Clear TX/RX Int. Status */
401 sio_mask(up, TXX9_SIDISR,
402 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS |
404 spin_unlock(&up->port.lock);
406 if (pass_counter++ > PASS_LIMIT)
410 return pass_counter ? IRQ_HANDLED : IRQ_NONE;
413 static unsigned int serial_txx9_tx_empty(struct uart_port *port)
415 struct uart_txx9_port *up = to_uart_txx9_port(port);
419 spin_lock_irqsave(&up->port.lock, flags);
420 ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0;
421 spin_unlock_irqrestore(&up->port.lock, flags);
426 static unsigned int serial_txx9_get_mctrl(struct uart_port *port)
428 struct uart_txx9_port *up = to_uart_txx9_port(port);
431 /* no modem control lines */
432 ret = TIOCM_CAR | TIOCM_DSR;
433 ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS;
434 ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS;
439 static void serial_txx9_set_mctrl(struct uart_port *port, unsigned int mctrl)
441 struct uart_txx9_port *up = to_uart_txx9_port(port);
443 if (mctrl & TIOCM_RTS)
444 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
446 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC);
449 static void serial_txx9_break_ctl(struct uart_port *port, int break_state)
451 struct uart_txx9_port *up = to_uart_txx9_port(port);
454 spin_lock_irqsave(&up->port.lock, flags);
455 if (break_state == -1)
456 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
458 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
459 spin_unlock_irqrestore(&up->port.lock, flags);
462 #if defined(CONFIG_SERIAL_TXX9_CONSOLE) || defined(CONFIG_CONSOLE_POLL)
464 * Wait for transmitter & holding register to empty
466 static void wait_for_xmitr(struct uart_txx9_port *up)
468 unsigned int tmout = 10000;
470 /* Wait up to 10ms for the character(s) to be sent. */
472 !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS))
475 /* Wait up to 1s for flow control if necessary */
476 if (up->port.flags & UPF_CONS_FLOW) {
479 (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS))
485 #ifdef CONFIG_CONSOLE_POLL
487 * Console polling routines for writing and reading from the uart while
488 * in an interrupt or debug context.
491 static int serial_txx9_get_poll_char(struct uart_port *port)
495 struct uart_txx9_port *up = to_uart_txx9_port(port);
498 * First save the IER then disable the interrupts
500 ier = sio_in(up, TXX9_SIDICR);
501 sio_out(up, TXX9_SIDICR, 0);
503 while (sio_in(up, TXX9_SIDISR) & TXX9_SIDISR_UVALID)
506 c = sio_in(up, TXX9_SIRFIFO);
509 * Finally, clear RX interrupt status
510 * and restore the IER
512 sio_mask(up, TXX9_SIDISR, TXX9_SIDISR_RDIS);
513 sio_out(up, TXX9_SIDICR, ier);
518 static void serial_txx9_put_poll_char(struct uart_port *port, unsigned char c)
521 struct uart_txx9_port *up = to_uart_txx9_port(port);
524 * First save the IER then disable the interrupts
526 ier = sio_in(up, TXX9_SIDICR);
527 sio_out(up, TXX9_SIDICR, 0);
531 * Send the character out.
533 sio_out(up, TXX9_SITFIFO, c);
536 * Finally, wait for transmitter to become empty
537 * and restore the IER
540 sio_out(up, TXX9_SIDICR, ier);
543 #endif /* CONFIG_CONSOLE_POLL */
545 static int serial_txx9_startup(struct uart_port *port)
547 struct uart_txx9_port *up = to_uart_txx9_port(port);
552 * Clear the FIFO buffers and disable them.
553 * (they will be reenabled in set_termios())
555 sio_set(up, TXX9_SIFCR,
556 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
558 sio_mask(up, TXX9_SIFCR,
559 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
560 sio_out(up, TXX9_SIDICR, 0);
563 * Clear the interrupt registers.
565 sio_out(up, TXX9_SIDISR, 0);
567 retval = request_irq(up->port.irq, serial_txx9_interrupt,
568 IRQF_SHARED, "serial_txx9", up);
573 * Now, initialize the UART
575 spin_lock_irqsave(&up->port.lock, flags);
576 serial_txx9_set_mctrl(&up->port, up->port.mctrl);
577 spin_unlock_irqrestore(&up->port.lock, flags);
580 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
583 * Finally, enable interrupts.
585 sio_set(up, TXX9_SIDICR, TXX9_SIDICR_RIE);
590 static void serial_txx9_shutdown(struct uart_port *port)
592 struct uart_txx9_port *up = to_uart_txx9_port(port);
596 * Disable interrupts from this port
598 sio_out(up, TXX9_SIDICR, 0); /* disable all intrs */
600 spin_lock_irqsave(&up->port.lock, flags);
601 serial_txx9_set_mctrl(&up->port, up->port.mctrl);
602 spin_unlock_irqrestore(&up->port.lock, flags);
605 * Disable break condition
607 sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK);
609 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
610 if (up->port.cons && up->port.line == up->port.cons->index) {
611 free_irq(up->port.irq, up);
616 sio_set(up, TXX9_SIFCR,
617 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
619 sio_mask(up, TXX9_SIFCR,
620 TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE);
623 sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE);
625 free_irq(up->port.irq, up);
629 serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios,
630 struct ktermios *old)
632 struct uart_txx9_port *up = to_uart_txx9_port(port);
633 unsigned int cval, fcr = 0;
635 unsigned int baud, quot;
638 * We don't support modem control lines.
640 termios->c_cflag &= ~(HUPCL | CMSPAR);
641 termios->c_cflag |= CLOCAL;
643 cval = sio_in(up, TXX9_SILCR);
644 /* byte size and parity */
645 cval &= ~TXX9_SILCR_UMODE_MASK;
646 switch (termios->c_cflag & CSIZE) {
648 cval |= TXX9_SILCR_UMODE_7BIT;
651 case CS5: /* not supported */
652 case CS6: /* not supported */
654 cval |= TXX9_SILCR_UMODE_8BIT;
658 cval &= ~TXX9_SILCR_USBL_MASK;
659 if (termios->c_cflag & CSTOPB)
660 cval |= TXX9_SILCR_USBL_2BIT;
662 cval |= TXX9_SILCR_USBL_1BIT;
663 cval &= ~(TXX9_SILCR_UPEN | TXX9_SILCR_UEPS);
664 if (termios->c_cflag & PARENB)
665 cval |= TXX9_SILCR_UPEN;
666 if (!(termios->c_cflag & PARODD))
667 cval |= TXX9_SILCR_UEPS;
670 * Ask the core to calculate the divisor for us.
672 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16/2);
673 quot = uart_get_divisor(port, baud);
676 /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */
677 fcr = TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1;
680 * Ok, we're now changing the port state. Do it with
681 * interrupts disabled.
683 spin_lock_irqsave(&up->port.lock, flags);
686 * Update the per-port timeout.
688 uart_update_timeout(port, termios->c_cflag, baud);
690 up->port.read_status_mask = TXX9_SIDISR_UOER |
691 TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS;
692 if (termios->c_iflag & INPCK)
693 up->port.read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER;
694 if (termios->c_iflag & (IGNBRK | BRKINT | PARMRK))
695 up->port.read_status_mask |= TXX9_SIDISR_UBRK;
698 * Characteres to ignore
700 up->port.ignore_status_mask = 0;
701 if (termios->c_iflag & IGNPAR)
702 up->port.ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER;
703 if (termios->c_iflag & IGNBRK) {
704 up->port.ignore_status_mask |= TXX9_SIDISR_UBRK;
706 * If we're ignoring parity and break indicators,
707 * ignore overruns too (for real raw support).
709 if (termios->c_iflag & IGNPAR)
710 up->port.ignore_status_mask |= TXX9_SIDISR_UOER;
714 * ignore all characters if CREAD is not set
716 if ((termios->c_cflag & CREAD) == 0)
717 up->port.ignore_status_mask |= TXX9_SIDISR_RDIS;
719 /* CTS flow control flag */
720 if ((termios->c_cflag & CRTSCTS) &&
721 (up->port.flags & UPF_TXX9_HAVE_CTS_LINE)) {
722 sio_set(up, TXX9_SIFLCR,
723 TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
725 sio_mask(up, TXX9_SIFLCR,
726 TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES);
729 sio_out(up, TXX9_SILCR, cval);
730 sio_quot_set(up, quot);
731 sio_out(up, TXX9_SIFCR, fcr);
733 serial_txx9_set_mctrl(&up->port, up->port.mctrl);
734 spin_unlock_irqrestore(&up->port.lock, flags);
738 serial_txx9_pm(struct uart_port *port, unsigned int state,
739 unsigned int oldstate)
742 * If oldstate was -1 this is called from
743 * uart_configure_port(). In this case do not initialize the
744 * port now, because the port was already initialized (for
745 * non-console port) or should not be initialized here (for
746 * console port). If we initialized the port here we lose
747 * serial console settings.
749 if (state == 0 && oldstate != -1)
750 serial_txx9_initialize(port);
753 static int serial_txx9_request_resource(struct uart_txx9_port *up)
755 unsigned int size = TXX9_REGION_SIZE;
758 switch (up->port.iotype) {
760 if (!up->port.mapbase)
763 if (!request_mem_region(up->port.mapbase, size, "serial_txx9")) {
768 if (up->port.flags & UPF_IOREMAP) {
769 up->port.membase = ioremap(up->port.mapbase, size);
770 if (!up->port.membase) {
771 release_mem_region(up->port.mapbase, size);
778 if (!request_region(up->port.iobase, size, "serial_txx9"))
785 static void serial_txx9_release_resource(struct uart_txx9_port *up)
787 unsigned int size = TXX9_REGION_SIZE;
789 switch (up->port.iotype) {
791 if (!up->port.mapbase)
794 if (up->port.flags & UPF_IOREMAP) {
795 iounmap(up->port.membase);
796 up->port.membase = NULL;
799 release_mem_region(up->port.mapbase, size);
803 release_region(up->port.iobase, size);
808 static void serial_txx9_release_port(struct uart_port *port)
810 struct uart_txx9_port *up = to_uart_txx9_port(port);
811 serial_txx9_release_resource(up);
814 static int serial_txx9_request_port(struct uart_port *port)
816 struct uart_txx9_port *up = to_uart_txx9_port(port);
817 return serial_txx9_request_resource(up);
820 static void serial_txx9_config_port(struct uart_port *port, int uflags)
822 struct uart_txx9_port *up = to_uart_txx9_port(port);
826 * Find the region that we can probe for. This in turn
827 * tells us whether we can probe for the type of port.
829 ret = serial_txx9_request_resource(up);
832 port->type = PORT_TXX9;
833 up->port.fifosize = TXX9_SIO_TX_FIFO;
835 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
836 if (up->port.line == up->port.cons->index)
839 serial_txx9_initialize(port);
843 serial_txx9_type(struct uart_port *port)
848 static struct uart_ops serial_txx9_pops = {
849 .tx_empty = serial_txx9_tx_empty,
850 .set_mctrl = serial_txx9_set_mctrl,
851 .get_mctrl = serial_txx9_get_mctrl,
852 .stop_tx = serial_txx9_stop_tx,
853 .start_tx = serial_txx9_start_tx,
854 .stop_rx = serial_txx9_stop_rx,
855 .break_ctl = serial_txx9_break_ctl,
856 .startup = serial_txx9_startup,
857 .shutdown = serial_txx9_shutdown,
858 .set_termios = serial_txx9_set_termios,
859 .pm = serial_txx9_pm,
860 .type = serial_txx9_type,
861 .release_port = serial_txx9_release_port,
862 .request_port = serial_txx9_request_port,
863 .config_port = serial_txx9_config_port,
864 #ifdef CONFIG_CONSOLE_POLL
865 .poll_get_char = serial_txx9_get_poll_char,
866 .poll_put_char = serial_txx9_put_poll_char,
870 static struct uart_txx9_port serial_txx9_ports[UART_NR];
872 static void __init serial_txx9_register_ports(struct uart_driver *drv,
877 for (i = 0; i < UART_NR; i++) {
878 struct uart_txx9_port *up = &serial_txx9_ports[i];
881 up->port.ops = &serial_txx9_pops;
883 if (up->port.iobase || up->port.mapbase)
884 uart_add_one_port(drv, &up->port);
888 #ifdef CONFIG_SERIAL_TXX9_CONSOLE
890 static void serial_txx9_console_putchar(struct uart_port *port, int ch)
892 struct uart_txx9_port *up = to_uart_txx9_port(port);
895 sio_out(up, TXX9_SITFIFO, ch);
899 * Print a string to the serial port trying not to disturb
900 * any possible real use of the port...
902 * The console_lock must be held when we get here.
905 serial_txx9_console_write(struct console *co, const char *s, unsigned int count)
907 struct uart_txx9_port *up = &serial_txx9_ports[co->index];
908 unsigned int ier, flcr;
911 * First save the UER then disable the interrupts
913 ier = sio_in(up, TXX9_SIDICR);
914 sio_out(up, TXX9_SIDICR, 0);
916 * Disable flow-control if enabled (and unnecessary)
918 flcr = sio_in(up, TXX9_SIFLCR);
919 if (!(up->port.flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES))
920 sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES);
922 uart_console_write(&up->port, s, count, serial_txx9_console_putchar);
925 * Finally, wait for transmitter to become empty
926 * and restore the IER
929 sio_out(up, TXX9_SIFLCR, flcr);
930 sio_out(up, TXX9_SIDICR, ier);
933 static int __init serial_txx9_console_setup(struct console *co, char *options)
935 struct uart_port *port;
936 struct uart_txx9_port *up;
943 * Check whether an invalid uart number has been specified, and
944 * if so, search for the first available port that does have
947 if (co->index >= UART_NR)
949 up = &serial_txx9_ports[co->index];
954 serial_txx9_initialize(&up->port);
957 uart_parse_options(options, &baud, &parity, &bits, &flow);
959 return uart_set_options(port, co, baud, parity, bits, flow);
962 static struct uart_driver serial_txx9_reg;
963 static struct console serial_txx9_console = {
964 .name = TXX9_TTY_NAME,
965 .write = serial_txx9_console_write,
966 .device = uart_console_device,
967 .setup = serial_txx9_console_setup,
968 .flags = CON_PRINTBUFFER,
970 .data = &serial_txx9_reg,
973 static int __init serial_txx9_console_init(void)
975 register_console(&serial_txx9_console);
978 console_initcall(serial_txx9_console_init);
980 #define SERIAL_TXX9_CONSOLE &serial_txx9_console
982 #define SERIAL_TXX9_CONSOLE NULL
985 static struct uart_driver serial_txx9_reg = {
986 .owner = THIS_MODULE,
987 .driver_name = "serial_txx9",
988 .dev_name = TXX9_TTY_NAME,
989 .major = TXX9_TTY_MAJOR,
990 .minor = TXX9_TTY_MINOR_START,
992 .cons = SERIAL_TXX9_CONSOLE,
995 int __init early_serial_txx9_setup(struct uart_port *port)
997 if (port->line >= ARRAY_SIZE(serial_txx9_ports))
1000 serial_txx9_ports[port->line].port = *port;
1001 serial_txx9_ports[port->line].port.ops = &serial_txx9_pops;
1002 serial_txx9_ports[port->line].port.flags |=
1003 UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
1007 static DEFINE_MUTEX(serial_txx9_mutex);
1010 * serial_txx9_register_port - register a serial port
1011 * @port: serial port template
1013 * Configure the serial port specified by the request.
1015 * The port is then probed and if necessary the IRQ is autodetected
1016 * If this fails an error is returned.
1018 * On success the port is ready to use and the line number is returned.
1020 static int serial_txx9_register_port(struct uart_port *port)
1023 struct uart_txx9_port *uart;
1026 mutex_lock(&serial_txx9_mutex);
1027 for (i = 0; i < UART_NR; i++) {
1028 uart = &serial_txx9_ports[i];
1029 if (uart_match_port(&uart->port, port)) {
1030 uart_remove_one_port(&serial_txx9_reg, &uart->port);
1035 /* Find unused port */
1036 for (i = 0; i < UART_NR; i++) {
1037 uart = &serial_txx9_ports[i];
1038 if (!(uart->port.iobase || uart->port.mapbase))
1043 uart->port.iobase = port->iobase;
1044 uart->port.membase = port->membase;
1045 uart->port.irq = port->irq;
1046 uart->port.uartclk = port->uartclk;
1047 uart->port.iotype = port->iotype;
1048 uart->port.flags = port->flags
1049 | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT;
1050 uart->port.mapbase = port->mapbase;
1052 uart->port.dev = port->dev;
1053 ret = uart_add_one_port(&serial_txx9_reg, &uart->port);
1055 ret = uart->port.line;
1057 mutex_unlock(&serial_txx9_mutex);
1062 * serial_txx9_unregister_port - remove a txx9 serial port at runtime
1063 * @line: serial line number
1065 * Remove one serial port. This may not be called from interrupt
1066 * context. We hand the port back to the our control.
1068 static void serial_txx9_unregister_port(int line)
1070 struct uart_txx9_port *uart = &serial_txx9_ports[line];
1072 mutex_lock(&serial_txx9_mutex);
1073 uart_remove_one_port(&serial_txx9_reg, &uart->port);
1074 uart->port.flags = 0;
1075 uart->port.type = PORT_UNKNOWN;
1076 uart->port.iobase = 0;
1077 uart->port.mapbase = 0;
1078 uart->port.membase = NULL;
1079 uart->port.dev = NULL;
1080 mutex_unlock(&serial_txx9_mutex);
1084 * Register a set of serial devices attached to a platform device.
1086 static int serial_txx9_probe(struct platform_device *dev)
1088 struct uart_port *p = dev_get_platdata(&dev->dev);
1089 struct uart_port port;
1092 memset(&port, 0, sizeof(struct uart_port));
1093 for (i = 0; p && p->uartclk != 0; p++, i++) {
1094 port.iobase = p->iobase;
1095 port.membase = p->membase;
1097 port.uartclk = p->uartclk;
1098 port.iotype = p->iotype;
1099 port.flags = p->flags;
1100 port.mapbase = p->mapbase;
1101 port.dev = &dev->dev;
1102 ret = serial_txx9_register_port(&port);
1104 dev_err(&dev->dev, "unable to register port at index %d "
1105 "(IO%lx MEM%llx IRQ%d): %d\n", i,
1106 p->iobase, (unsigned long long)p->mapbase,
1114 * Remove serial ports registered against a platform device.
1116 static int serial_txx9_remove(struct platform_device *dev)
1120 for (i = 0; i < UART_NR; i++) {
1121 struct uart_txx9_port *up = &serial_txx9_ports[i];
1123 if (up->port.dev == &dev->dev)
1124 serial_txx9_unregister_port(i);
1130 static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state)
1134 for (i = 0; i < UART_NR; i++) {
1135 struct uart_txx9_port *up = &serial_txx9_ports[i];
1137 if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
1138 uart_suspend_port(&serial_txx9_reg, &up->port);
1144 static int serial_txx9_resume(struct platform_device *dev)
1148 for (i = 0; i < UART_NR; i++) {
1149 struct uart_txx9_port *up = &serial_txx9_ports[i];
1151 if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev)
1152 uart_resume_port(&serial_txx9_reg, &up->port);
1159 static struct platform_driver serial_txx9_plat_driver = {
1160 .probe = serial_txx9_probe,
1161 .remove = serial_txx9_remove,
1163 .suspend = serial_txx9_suspend,
1164 .resume = serial_txx9_resume,
1167 .name = "serial_txx9",
1171 #ifdef ENABLE_SERIAL_TXX9_PCI
1173 * Probe one serial board. Unfortunately, there is no rhyme nor reason
1174 * to the arrangement of serial ports on a PCI card.
1177 pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent)
1179 struct uart_port port;
1183 rc = pci_enable_device(dev);
1187 memset(&port, 0, sizeof(port));
1188 port.ops = &serial_txx9_pops;
1189 port.flags |= UPF_TXX9_HAVE_CTS_LINE;
1190 port.uartclk = 66670000;
1191 port.irq = dev->irq;
1192 port.iotype = UPIO_PORT;
1193 port.iobase = pci_resource_start(dev, 1);
1194 port.dev = &dev->dev;
1195 line = serial_txx9_register_port(&port);
1197 printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line);
1198 pci_disable_device(dev);
1201 pci_set_drvdata(dev, &serial_txx9_ports[line]);
1206 static void pciserial_txx9_remove_one(struct pci_dev *dev)
1208 struct uart_txx9_port *up = pci_get_drvdata(dev);
1211 serial_txx9_unregister_port(up->port.line);
1212 pci_disable_device(dev);
1217 static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state)
1219 struct uart_txx9_port *up = pci_get_drvdata(dev);
1222 uart_suspend_port(&serial_txx9_reg, &up->port);
1223 pci_save_state(dev);
1224 pci_set_power_state(dev, pci_choose_state(dev, state));
1228 static int pciserial_txx9_resume_one(struct pci_dev *dev)
1230 struct uart_txx9_port *up = pci_get_drvdata(dev);
1232 pci_set_power_state(dev, PCI_D0);
1233 pci_restore_state(dev);
1235 uart_resume_port(&serial_txx9_reg, &up->port);
1240 static const struct pci_device_id serial_txx9_pci_tbl[] = {
1241 { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC) },
1245 static struct pci_driver serial_txx9_pci_driver = {
1246 .name = "serial_txx9",
1247 .probe = pciserial_txx9_init_one,
1248 .remove = pciserial_txx9_remove_one,
1250 .suspend = pciserial_txx9_suspend_one,
1251 .resume = pciserial_txx9_resume_one,
1253 .id_table = serial_txx9_pci_tbl,
1256 MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl);
1257 #endif /* ENABLE_SERIAL_TXX9_PCI */
1259 static struct platform_device *serial_txx9_plat_devs;
1261 static int __init serial_txx9_init(void)
1265 printk(KERN_INFO "%s version %s\n", serial_name, serial_version);
1267 ret = uart_register_driver(&serial_txx9_reg);
1271 serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1);
1272 if (!serial_txx9_plat_devs) {
1274 goto unreg_uart_drv;
1277 ret = platform_device_add(serial_txx9_plat_devs);
1281 serial_txx9_register_ports(&serial_txx9_reg,
1282 &serial_txx9_plat_devs->dev);
1284 ret = platform_driver_register(&serial_txx9_plat_driver);
1288 #ifdef ENABLE_SERIAL_TXX9_PCI
1289 ret = pci_register_driver(&serial_txx9_pci_driver);
1291 platform_driver_unregister(&serial_txx9_plat_driver);
1298 platform_device_del(serial_txx9_plat_devs);
1300 platform_device_put(serial_txx9_plat_devs);
1302 uart_unregister_driver(&serial_txx9_reg);
1307 static void __exit serial_txx9_exit(void)
1311 #ifdef ENABLE_SERIAL_TXX9_PCI
1312 pci_unregister_driver(&serial_txx9_pci_driver);
1314 platform_driver_unregister(&serial_txx9_plat_driver);
1315 platform_device_unregister(serial_txx9_plat_devs);
1316 for (i = 0; i < UART_NR; i++) {
1317 struct uart_txx9_port *up = &serial_txx9_ports[i];
1318 if (up->port.iobase || up->port.mapbase)
1319 uart_remove_one_port(&serial_txx9_reg, &up->port);
1322 uart_unregister_driver(&serial_txx9_reg);
1325 module_init(serial_txx9_init);
1326 module_exit(serial_txx9_exit);
1328 MODULE_LICENSE("GPL");
1329 MODULE_DESCRIPTION("TX39/49 serial driver");
1331 MODULE_ALIAS_CHARDEV_MAJOR(TXX9_TTY_MAJOR);