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-rw-r--r--drivers/serial/pxa.c877
1 files changed, 877 insertions, 0 deletions
diff --git a/drivers/serial/pxa.c b/drivers/serial/pxa.c
new file mode 100644
index 000000000000..68b25b2c26b1
--- /dev/null
+++ b/drivers/serial/pxa.c
@@ -0,0 +1,877 @@
1/*
2 * linux/drivers/serial/pxa.c
3 *
4 * Based on drivers/serial/8250.c by Russell King.
5 *
6 * Author: Nicolas Pitre
7 * Created: Feb 20, 2003
8 * Copyright: (C) 2003 Monta Vista Software, Inc.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * Note 1: This driver is made separate from the already too overloaded
16 * 8250.c because it needs some kirks of its own and that'll make it
17 * easier to add DMA support.
18 *
19 * Note 2: I'm too sick of device allocation policies for serial ports.
20 * If someone else wants to request an "official" allocation of major/minor
21 * for this driver please be my guest. And don't forget that new hardware
22 * to come from Intel might have more than 3 or 4 of those UARTs. Let's
23 * hope for a better port registration and dynamic device allocation scheme
24 * with the serial core maintainer satisfaction to appear soon.
25 */
26
27#include <linux/config.h>
28
29#if defined(CONFIG_SERIAL_PXA_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ)
30#define SUPPORT_SYSRQ
31#endif
32
33#include <linux/module.h>
34#include <linux/ioport.h>
35#include <linux/init.h>
36#include <linux/console.h>
37#include <linux/sysrq.h>
38#include <linux/serial_reg.h>
39#include <linux/circ_buf.h>
40#include <linux/delay.h>
41#include <linux/interrupt.h>
42#include <linux/device.h>
43#include <linux/tty.h>
44#include <linux/tty_flip.h>
45#include <linux/serial_core.h>
46
47#include <asm/io.h>
48#include <asm/hardware.h>
49#include <asm/irq.h>
50#include <asm/arch/pxa-regs.h>
51
52
53struct uart_pxa_port {
54 struct uart_port port;
55 unsigned char ier;
56 unsigned char lcr;
57 unsigned char mcr;
58 unsigned int lsr_break_flag;
59 unsigned int cken;
60 char *name;
61};
62
63static inline unsigned int serial_in(struct uart_pxa_port *up, int offset)
64{
65 offset <<= 2;
66 return readl(up->port.membase + offset);
67}
68
69static inline void serial_out(struct uart_pxa_port *up, int offset, int value)
70{
71 offset <<= 2;
72 writel(value, up->port.membase + offset);
73}
74
75static void serial_pxa_enable_ms(struct uart_port *port)
76{
77 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
78
79 up->ier |= UART_IER_MSI;
80 serial_out(up, UART_IER, up->ier);
81}
82
83static void serial_pxa_stop_tx(struct uart_port *port, unsigned int tty_stop)
84{
85 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
86
87 if (up->ier & UART_IER_THRI) {
88 up->ier &= ~UART_IER_THRI;
89 serial_out(up, UART_IER, up->ier);
90 }
91}
92
93static void serial_pxa_stop_rx(struct uart_port *port)
94{
95 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
96
97 up->ier &= ~UART_IER_RLSI;
98 up->port.read_status_mask &= ~UART_LSR_DR;
99 serial_out(up, UART_IER, up->ier);
100}
101
102static inline void
103receive_chars(struct uart_pxa_port *up, int *status, struct pt_regs *regs)
104{
105 struct tty_struct *tty = up->port.info->tty;
106 unsigned int ch, flag;
107 int max_count = 256;
108
109 do {
110 if (unlikely(tty->flip.count >= TTY_FLIPBUF_SIZE)) {
111 if (tty->low_latency)
112 tty_flip_buffer_push(tty);
113 /*
114 * If this failed then we will throw away the
115 * bytes but must do so to clear interrupts
116 */
117 }
118 ch = serial_in(up, UART_RX);
119 flag = TTY_NORMAL;
120 up->port.icount.rx++;
121
122 if (unlikely(*status & (UART_LSR_BI | UART_LSR_PE |
123 UART_LSR_FE | UART_LSR_OE))) {
124 /*
125 * For statistics only
126 */
127 if (*status & UART_LSR_BI) {
128 *status &= ~(UART_LSR_FE | UART_LSR_PE);
129 up->port.icount.brk++;
130 /*
131 * We do the SysRQ and SAK checking
132 * here because otherwise the break
133 * may get masked by ignore_status_mask
134 * or read_status_mask.
135 */
136 if (uart_handle_break(&up->port))
137 goto ignore_char;
138 } else if (*status & UART_LSR_PE)
139 up->port.icount.parity++;
140 else if (*status & UART_LSR_FE)
141 up->port.icount.frame++;
142 if (*status & UART_LSR_OE)
143 up->port.icount.overrun++;
144
145 /*
146 * Mask off conditions which should be ignored.
147 */
148 *status &= up->port.read_status_mask;
149
150#ifdef CONFIG_SERIAL_PXA_CONSOLE
151 if (up->port.line == up->port.cons->index) {
152 /* Recover the break flag from console xmit */
153 *status |= up->lsr_break_flag;
154 up->lsr_break_flag = 0;
155 }
156#endif
157 if (*status & UART_LSR_BI) {
158 flag = TTY_BREAK;
159 } else if (*status & UART_LSR_PE)
160 flag = TTY_PARITY;
161 else if (*status & UART_LSR_FE)
162 flag = TTY_FRAME;
163 }
164 if (uart_handle_sysrq_char(&up->port, ch, regs))
165 goto ignore_char;
166 if ((*status & up->port.ignore_status_mask) == 0) {
167 tty_insert_flip_char(tty, ch, flag);
168 }
169 if ((*status & UART_LSR_OE) &&
170 tty->flip.count < TTY_FLIPBUF_SIZE) {
171 /*
172 * Overrun is special, since it's reported
173 * immediately, and doesn't affect the current
174 * character.
175 */
176 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
177 }
178 ignore_char:
179 *status = serial_in(up, UART_LSR);
180 } while ((*status & UART_LSR_DR) && (max_count-- > 0));
181 tty_flip_buffer_push(tty);
182}
183
184static void transmit_chars(struct uart_pxa_port *up)
185{
186 struct circ_buf *xmit = &up->port.info->xmit;
187 int count;
188
189 if (up->port.x_char) {
190 serial_out(up, UART_TX, up->port.x_char);
191 up->port.icount.tx++;
192 up->port.x_char = 0;
193 return;
194 }
195 if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
196 serial_pxa_stop_tx(&up->port, 0);
197 return;
198 }
199
200 count = up->port.fifosize / 2;
201 do {
202 serial_out(up, UART_TX, xmit->buf[xmit->tail]);
203 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
204 up->port.icount.tx++;
205 if (uart_circ_empty(xmit))
206 break;
207 } while (--count > 0);
208
209 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
210 uart_write_wakeup(&up->port);
211
212
213 if (uart_circ_empty(xmit))
214 serial_pxa_stop_tx(&up->port, 0);
215}
216
217static void serial_pxa_start_tx(struct uart_port *port, unsigned int tty_start)
218{
219 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
220
221 if (!(up->ier & UART_IER_THRI)) {
222 up->ier |= UART_IER_THRI;
223 serial_out(up, UART_IER, up->ier);
224 }
225}
226
227static inline void check_modem_status(struct uart_pxa_port *up)
228{
229 int status;
230
231 status = serial_in(up, UART_MSR);
232
233 if ((status & UART_MSR_ANY_DELTA) == 0)
234 return;
235
236 if (status & UART_MSR_TERI)
237 up->port.icount.rng++;
238 if (status & UART_MSR_DDSR)
239 up->port.icount.dsr++;
240 if (status & UART_MSR_DDCD)
241 uart_handle_dcd_change(&up->port, status & UART_MSR_DCD);
242 if (status & UART_MSR_DCTS)
243 uart_handle_cts_change(&up->port, status & UART_MSR_CTS);
244
245 wake_up_interruptible(&up->port.info->delta_msr_wait);
246}
247
248/*
249 * This handles the interrupt from one port.
250 */
251static inline irqreturn_t
252serial_pxa_irq(int irq, void *dev_id, struct pt_regs *regs)
253{
254 struct uart_pxa_port *up = (struct uart_pxa_port *)dev_id;
255 unsigned int iir, lsr;
256
257 iir = serial_in(up, UART_IIR);
258 if (iir & UART_IIR_NO_INT)
259 return IRQ_NONE;
260 lsr = serial_in(up, UART_LSR);
261 if (lsr & UART_LSR_DR)
262 receive_chars(up, &lsr, regs);
263 check_modem_status(up);
264 if (lsr & UART_LSR_THRE)
265 transmit_chars(up);
266 return IRQ_HANDLED;
267}
268
269static unsigned int serial_pxa_tx_empty(struct uart_port *port)
270{
271 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
272 unsigned long flags;
273 unsigned int ret;
274
275 spin_lock_irqsave(&up->port.lock, flags);
276 ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0;
277 spin_unlock_irqrestore(&up->port.lock, flags);
278
279 return ret;
280}
281
282static unsigned int serial_pxa_get_mctrl(struct uart_port *port)
283{
284 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
285 unsigned long flags;
286 unsigned char status;
287 unsigned int ret;
288
289return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
290 spin_lock_irqsave(&up->port.lock, flags);
291 status = serial_in(up, UART_MSR);
292 spin_unlock_irqrestore(&up->port.lock, flags);
293
294 ret = 0;
295 if (status & UART_MSR_DCD)
296 ret |= TIOCM_CAR;
297 if (status & UART_MSR_RI)
298 ret |= TIOCM_RNG;
299 if (status & UART_MSR_DSR)
300 ret |= TIOCM_DSR;
301 if (status & UART_MSR_CTS)
302 ret |= TIOCM_CTS;
303 return ret;
304}
305
306static void serial_pxa_set_mctrl(struct uart_port *port, unsigned int mctrl)
307{
308 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
309 unsigned char mcr = 0;
310
311 if (mctrl & TIOCM_RTS)
312 mcr |= UART_MCR_RTS;
313 if (mctrl & TIOCM_DTR)
314 mcr |= UART_MCR_DTR;
315 if (mctrl & TIOCM_OUT1)
316 mcr |= UART_MCR_OUT1;
317 if (mctrl & TIOCM_OUT2)
318 mcr |= UART_MCR_OUT2;
319 if (mctrl & TIOCM_LOOP)
320 mcr |= UART_MCR_LOOP;
321
322 mcr |= up->mcr;
323
324 serial_out(up, UART_MCR, mcr);
325}
326
327static void serial_pxa_break_ctl(struct uart_port *port, int break_state)
328{
329 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
330 unsigned long flags;
331
332 spin_lock_irqsave(&up->port.lock, flags);
333 if (break_state == -1)
334 up->lcr |= UART_LCR_SBC;
335 else
336 up->lcr &= ~UART_LCR_SBC;
337 serial_out(up, UART_LCR, up->lcr);
338 spin_unlock_irqrestore(&up->port.lock, flags);
339}
340
341#if 0
342static void serial_pxa_dma_init(struct pxa_uart *up)
343{
344 up->rxdma =
345 pxa_request_dma(up->name, DMA_PRIO_LOW, pxa_receive_dma, up);
346 if (up->rxdma < 0)
347 goto out;
348 up->txdma =
349 pxa_request_dma(up->name, DMA_PRIO_LOW, pxa_transmit_dma, up);
350 if (up->txdma < 0)
351 goto err_txdma;
352 up->dmadesc = kmalloc(4 * sizeof(pxa_dma_desc), GFP_KERNEL);
353 if (!up->dmadesc)
354 goto err_alloc;
355
356 /* ... */
357err_alloc:
358 pxa_free_dma(up->txdma);
359err_rxdma:
360 pxa_free_dma(up->rxdma);
361out:
362 return;
363}
364#endif
365
366static int serial_pxa_startup(struct uart_port *port)
367{
368 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
369 unsigned long flags;
370 int retval;
371
372 up->mcr = 0;
373
374 /*
375 * Allocate the IRQ
376 */
377 retval = request_irq(up->port.irq, serial_pxa_irq, 0, up->name, up);
378 if (retval)
379 return retval;
380
381 /*
382 * Clear the FIFO buffers and disable them.
383 * (they will be reenabled in set_termios())
384 */
385 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO);
386 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
387 UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
388 serial_out(up, UART_FCR, 0);
389
390 /*
391 * Clear the interrupt registers.
392 */
393 (void) serial_in(up, UART_LSR);
394 (void) serial_in(up, UART_RX);
395 (void) serial_in(up, UART_IIR);
396 (void) serial_in(up, UART_MSR);
397
398 /*
399 * Now, initialize the UART
400 */
401 serial_out(up, UART_LCR, UART_LCR_WLEN8);
402
403 spin_lock_irqsave(&up->port.lock, flags);
404 up->port.mctrl |= TIOCM_OUT2;
405 serial_pxa_set_mctrl(&up->port, up->port.mctrl);
406 spin_unlock_irqrestore(&up->port.lock, flags);
407
408 /*
409 * Finally, enable interrupts. Note: Modem status interrupts
410 * are set via set_termios(), which will be occuring imminently
411 * anyway, so we don't enable them here.
412 */
413 up->ier = UART_IER_RLSI | UART_IER_RDI | UART_IER_RTOIE | UART_IER_UUE;
414 serial_out(up, UART_IER, up->ier);
415
416 /*
417 * And clear the interrupt registers again for luck.
418 */
419 (void) serial_in(up, UART_LSR);
420 (void) serial_in(up, UART_RX);
421 (void) serial_in(up, UART_IIR);
422 (void) serial_in(up, UART_MSR);
423
424 return 0;
425}
426
427static void serial_pxa_shutdown(struct uart_port *port)
428{
429 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
430 unsigned long flags;
431
432 free_irq(up->port.irq, up);
433
434 /*
435 * Disable interrupts from this port
436 */
437 up->ier = 0;
438 serial_out(up, UART_IER, 0);
439
440 spin_lock_irqsave(&up->port.lock, flags);
441 up->port.mctrl &= ~TIOCM_OUT2;
442 serial_pxa_set_mctrl(&up->port, up->port.mctrl);
443 spin_unlock_irqrestore(&up->port.lock, flags);
444
445 /*
446 * Disable break condition and FIFOs
447 */
448 serial_out(up, UART_LCR, serial_in(up, UART_LCR) & ~UART_LCR_SBC);
449 serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO |
450 UART_FCR_CLEAR_RCVR |
451 UART_FCR_CLEAR_XMIT);
452 serial_out(up, UART_FCR, 0);
453}
454
455static void
456serial_pxa_set_termios(struct uart_port *port, struct termios *termios,
457 struct termios *old)
458{
459 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
460 unsigned char cval, fcr = 0;
461 unsigned long flags;
462 unsigned int baud, quot;
463
464 switch (termios->c_cflag & CSIZE) {
465 case CS5:
466 cval = 0x00;
467 break;
468 case CS6:
469 cval = 0x01;
470 break;
471 case CS7:
472 cval = 0x02;
473 break;
474 default:
475 case CS8:
476 cval = 0x03;
477 break;
478 }
479
480 if (termios->c_cflag & CSTOPB)
481 cval |= 0x04;
482 if (termios->c_cflag & PARENB)
483 cval |= UART_LCR_PARITY;
484 if (!(termios->c_cflag & PARODD))
485 cval |= UART_LCR_EPAR;
486
487 /*
488 * Ask the core to calculate the divisor for us.
489 */
490 baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16);
491 quot = uart_get_divisor(port, baud);
492
493 if ((up->port.uartclk / quot) < (2400 * 16))
494 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR1;
495 else
496 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_PXAR8;
497
498 /*
499 * Ok, we're now changing the port state. Do it with
500 * interrupts disabled.
501 */
502 spin_lock_irqsave(&up->port.lock, flags);
503
504 /*
505 * Ensure the port will be enabled.
506 * This is required especially for serial console.
507 */
508 up->ier |= IER_UUE;
509
510 /*
511 * Update the per-port timeout.
512 */
513 uart_update_timeout(port, termios->c_cflag, quot);
514
515 up->port.read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
516 if (termios->c_iflag & INPCK)
517 up->port.read_status_mask |= UART_LSR_FE | UART_LSR_PE;
518 if (termios->c_iflag & (BRKINT | PARMRK))
519 up->port.read_status_mask |= UART_LSR_BI;
520
521 /*
522 * Characters to ignore
523 */
524 up->port.ignore_status_mask = 0;
525 if (termios->c_iflag & IGNPAR)
526 up->port.ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
527 if (termios->c_iflag & IGNBRK) {
528 up->port.ignore_status_mask |= UART_LSR_BI;
529 /*
530 * If we're ignoring parity and break indicators,
531 * ignore overruns too (for real raw support).
532 */
533 if (termios->c_iflag & IGNPAR)
534 up->port.ignore_status_mask |= UART_LSR_OE;
535 }
536
537 /*
538 * ignore all characters if CREAD is not set
539 */
540 if ((termios->c_cflag & CREAD) == 0)
541 up->port.ignore_status_mask |= UART_LSR_DR;
542
543 /*
544 * CTS flow control flag and modem status interrupts
545 */
546 up->ier &= ~UART_IER_MSI;
547 if (UART_ENABLE_MS(&up->port, termios->c_cflag))
548 up->ier |= UART_IER_MSI;
549
550 serial_out(up, UART_IER, up->ier);
551
552 serial_out(up, UART_LCR, cval | UART_LCR_DLAB);/* set DLAB */
553 serial_out(up, UART_DLL, quot & 0xff); /* LS of divisor */
554 serial_out(up, UART_DLM, quot >> 8); /* MS of divisor */
555 serial_out(up, UART_LCR, cval); /* reset DLAB */
556 up->lcr = cval; /* Save LCR */
557 serial_pxa_set_mctrl(&up->port, up->port.mctrl);
558 serial_out(up, UART_FCR, fcr);
559 spin_unlock_irqrestore(&up->port.lock, flags);
560}
561
562static void
563serial_pxa_pm(struct uart_port *port, unsigned int state,
564 unsigned int oldstate)
565{
566 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
567 pxa_set_cken(up->cken, !state);
568 if (!state)
569 udelay(1);
570}
571
572static void serial_pxa_release_port(struct uart_port *port)
573{
574}
575
576static int serial_pxa_request_port(struct uart_port *port)
577{
578 return 0;
579}
580
581static void serial_pxa_config_port(struct uart_port *port, int flags)
582{
583 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
584 up->port.type = PORT_PXA;
585}
586
587static int
588serial_pxa_verify_port(struct uart_port *port, struct serial_struct *ser)
589{
590 /* we don't want the core code to modify any port params */
591 return -EINVAL;
592}
593
594static const char *
595serial_pxa_type(struct uart_port *port)
596{
597 struct uart_pxa_port *up = (struct uart_pxa_port *)port;
598 return up->name;
599}
600
601#ifdef CONFIG_SERIAL_PXA_CONSOLE
602
603extern struct uart_pxa_port serial_pxa_ports[];
604extern struct uart_driver serial_pxa_reg;
605
606#define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
607
608/*
609 * Wait for transmitter & holding register to empty
610 */
611static inline void wait_for_xmitr(struct uart_pxa_port *up)
612{
613 unsigned int status, tmout = 10000;
614
615 /* Wait up to 10ms for the character(s) to be sent. */
616 do {
617 status = serial_in(up, UART_LSR);
618
619 if (status & UART_LSR_BI)
620 up->lsr_break_flag = UART_LSR_BI;
621
622 if (--tmout == 0)
623 break;
624 udelay(1);
625 } while ((status & BOTH_EMPTY) != BOTH_EMPTY);
626
627 /* Wait up to 1s for flow control if necessary */
628 if (up->port.flags & UPF_CONS_FLOW) {
629 tmout = 1000000;
630 while (--tmout &&
631 ((serial_in(up, UART_MSR) & UART_MSR_CTS) == 0))
632 udelay(1);
633 }
634}
635
636/*
637 * Print a string to the serial port trying not to disturb
638 * any possible real use of the port...
639 *
640 * The console_lock must be held when we get here.
641 */
642static void
643serial_pxa_console_write(struct console *co, const char *s, unsigned int count)
644{
645 struct uart_pxa_port *up = &serial_pxa_ports[co->index];
646 unsigned int ier;
647 int i;
648
649 /*
650 * First save the UER then disable the interrupts
651 */
652 ier = serial_in(up, UART_IER);
653 serial_out(up, UART_IER, UART_IER_UUE);
654
655 /*
656 * Now, do each character
657 */
658 for (i = 0; i < count; i++, s++) {
659 wait_for_xmitr(up);
660
661 /*
662 * Send the character out.
663 * If a LF, also do CR...
664 */
665 serial_out(up, UART_TX, *s);
666 if (*s == 10) {
667 wait_for_xmitr(up);
668 serial_out(up, UART_TX, 13);
669 }
670 }
671
672 /*
673 * Finally, wait for transmitter to become empty
674 * and restore the IER
675 */
676 wait_for_xmitr(up);
677 serial_out(up, UART_IER, ier);
678}
679
680static int __init
681serial_pxa_console_setup(struct console *co, char *options)
682{
683 struct uart_pxa_port *up;
684 int baud = 9600;
685 int bits = 8;
686 int parity = 'n';
687 int flow = 'n';
688
689 if (co->index == -1 || co->index >= serial_pxa_reg.nr)
690 co->index = 0;
691 up = &serial_pxa_ports[co->index];
692
693 if (options)
694 uart_parse_options(options, &baud, &parity, &bits, &flow);
695
696 return uart_set_options(&up->port, co, baud, parity, bits, flow);
697}
698
699static struct console serial_pxa_console = {
700 .name = "ttyS",
701 .write = serial_pxa_console_write,
702 .device = uart_console_device,
703 .setup = serial_pxa_console_setup,
704 .flags = CON_PRINTBUFFER,
705 .index = -1,
706 .data = &serial_pxa_reg,
707};
708
709static int __init
710serial_pxa_console_init(void)
711{
712 register_console(&serial_pxa_console);
713 return 0;
714}
715
716console_initcall(serial_pxa_console_init);
717
718#define PXA_CONSOLE &serial_pxa_console
719#else
720#define PXA_CONSOLE NULL
721#endif
722
723struct uart_ops serial_pxa_pops = {
724 .tx_empty = serial_pxa_tx_empty,
725 .set_mctrl = serial_pxa_set_mctrl,
726 .get_mctrl = serial_pxa_get_mctrl,
727 .stop_tx = serial_pxa_stop_tx,
728 .start_tx = serial_pxa_start_tx,
729 .stop_rx = serial_pxa_stop_rx,
730 .enable_ms = serial_pxa_enable_ms,
731 .break_ctl = serial_pxa_break_ctl,
732 .startup = serial_pxa_startup,
733 .shutdown = serial_pxa_shutdown,
734 .set_termios = serial_pxa_set_termios,
735 .pm = serial_pxa_pm,
736 .type = serial_pxa_type,
737 .release_port = serial_pxa_release_port,
738 .request_port = serial_pxa_request_port,
739 .config_port = serial_pxa_config_port,
740 .verify_port = serial_pxa_verify_port,
741};
742
743static struct uart_pxa_port serial_pxa_ports[] = {
744 { /* FFUART */
745 .name = "FFUART",
746 .cken = CKEN6_FFUART,
747 .port = {
748 .type = PORT_PXA,
749 .iotype = UPIO_MEM,
750 .membase = (void *)&FFUART,
751 .mapbase = __PREG(FFUART),
752 .irq = IRQ_FFUART,
753 .uartclk = 921600 * 16,
754 .fifosize = 64,
755 .ops = &serial_pxa_pops,
756 .line = 0,
757 },
758 }, { /* BTUART */
759 .name = "BTUART",
760 .cken = CKEN7_BTUART,
761 .port = {
762 .type = PORT_PXA,
763 .iotype = UPIO_MEM,
764 .membase = (void *)&BTUART,
765 .mapbase = __PREG(BTUART),
766 .irq = IRQ_BTUART,
767 .uartclk = 921600 * 16,
768 .fifosize = 64,
769 .ops = &serial_pxa_pops,
770 .line = 1,
771 },
772 }, { /* STUART */
773 .name = "STUART",
774 .cken = CKEN5_STUART,
775 .port = {
776 .type = PORT_PXA,
777 .iotype = UPIO_MEM,
778 .membase = (void *)&STUART,
779 .mapbase = __PREG(STUART),
780 .irq = IRQ_STUART,
781 .uartclk = 921600 * 16,
782 .fifosize = 64,
783 .ops = &serial_pxa_pops,
784 .line = 2,
785 },
786 }
787};
788
789static struct uart_driver serial_pxa_reg = {
790 .owner = THIS_MODULE,
791 .driver_name = "PXA serial",
792 .devfs_name = "tts/",
793 .dev_name = "ttyS",
794 .major = TTY_MAJOR,
795 .minor = 64,
796 .nr = ARRAY_SIZE(serial_pxa_ports),
797 .cons = PXA_CONSOLE,
798};
799
800static int serial_pxa_suspend(struct device *_dev, u32 state, u32 level)
801{
802 struct uart_pxa_port *sport = dev_get_drvdata(_dev);
803
804 if (sport && level == SUSPEND_DISABLE)
805 uart_suspend_port(&serial_pxa_reg, &sport->port);
806
807 return 0;
808}
809
810static int serial_pxa_resume(struct device *_dev, u32 level)
811{
812 struct uart_pxa_port *sport = dev_get_drvdata(_dev);
813
814 if (sport && level == RESUME_ENABLE)
815 uart_resume_port(&serial_pxa_reg, &sport->port);
816
817 return 0;
818}
819
820static int serial_pxa_probe(struct device *_dev)
821{
822 struct platform_device *dev = to_platform_device(_dev);
823
824 serial_pxa_ports[dev->id].port.dev = _dev;
825 uart_add_one_port(&serial_pxa_reg, &serial_pxa_ports[dev->id].port);
826 dev_set_drvdata(_dev, &serial_pxa_ports[dev->id]);
827 return 0;
828}
829
830static int serial_pxa_remove(struct device *_dev)
831{
832 struct uart_pxa_port *sport = dev_get_drvdata(_dev);
833
834 dev_set_drvdata(_dev, NULL);
835
836 if (sport)
837 uart_remove_one_port(&serial_pxa_reg, &sport->port);
838
839 return 0;
840}
841
842static struct device_driver serial_pxa_driver = {
843 .name = "pxa2xx-uart",
844 .bus = &platform_bus_type,
845 .probe = serial_pxa_probe,
846 .remove = serial_pxa_remove,
847
848 .suspend = serial_pxa_suspend,
849 .resume = serial_pxa_resume,
850};
851
852int __init serial_pxa_init(void)
853{
854 int ret;
855
856 ret = uart_register_driver(&serial_pxa_reg);
857 if (ret != 0)
858 return ret;
859
860 ret = driver_register(&serial_pxa_driver);
861 if (ret != 0)
862 uart_unregister_driver(&serial_pxa_reg);
863
864 return ret;
865}
866
867void __exit serial_pxa_exit(void)
868{
869 driver_unregister(&serial_pxa_driver);
870 uart_unregister_driver(&serial_pxa_reg);
871}
872
873module_init(serial_pxa_init);
874module_exit(serial_pxa_exit);
875
876MODULE_LICENSE("GPL");
877
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-24 07:42:43 -0500