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21#define DRV_NAME "bfin-sport-uart"
22#define DEVICE_NAME "ttySS"
23#define pr_fmt(fmt) DRV_NAME ": " fmt
24
25#include <linux/module.h>
26#include <linux/ioport.h>
27#include <linux/io.h>
28#include <linux/init.h>
29#include <linux/console.h>
30#include <linux/sysrq.h>
31#include <linux/slab.h>
32#include <linux/platform_device.h>
33#include <linux/tty.h>
34#include <linux/tty_flip.h>
35#include <linux/serial_core.h>
36#include <linux/gpio.h>
37
38#include <asm/bfin_sport.h>
39#include <asm/delay.h>
40#include <asm/portmux.h>
41
42#include "bfin_sport_uart.h"
43
44struct sport_uart_port {
45 struct uart_port port;
46 int err_irq;
47 unsigned short csize;
48 unsigned short rxmask;
49 unsigned short txmask1;
50 unsigned short txmask2;
51 unsigned char stopb;
52
53#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS
54 int cts_pin;
55 int rts_pin;
56#endif
57};
58
59static int sport_uart_tx_chars(struct sport_uart_port *up);
60static void sport_stop_tx(struct uart_port *port);
61
62static inline void tx_one_byte(struct sport_uart_port *up, unsigned int value)
63{
64 pr_debug("%s value:%x, mask1=0x%x, mask2=0x%x\n", __func__, value,
65 up->txmask1, up->txmask2);
66
67
68 __asm__ __volatile__ (
69 "%[val] <<= 1;"
70 "%[val] = %[val] & %[mask1];"
71 "%[val] = %[val] | %[mask2];"
72 : [val]"+d"(value)
73 : [mask1]"d"(up->txmask1), [mask2]"d"(up->txmask2)
74 : "ASTAT"
75 );
76 pr_debug("%s value:%x\n", __func__, value);
77
78 SPORT_PUT_TX(up, value);
79}
80
81static inline unsigned char rx_one_byte(struct sport_uart_port *up)
82{
83 unsigned int value;
84 unsigned char extract;
85 u32 tmp_mask1, tmp_mask2, tmp_shift, tmp;
86
87 if ((up->csize + up->stopb) > 7)
88 value = SPORT_GET_RX32(up);
89 else
90 value = SPORT_GET_RX(up);
91
92 pr_debug("%s value:%x, cs=%d, mask=0x%x\n", __func__, value,
93 up->csize, up->rxmask);
94
95
96 __asm__ __volatile__ (
97 "%[extr] = 0;"
98 "%[mask1] = %[rxmask];"
99 "%[mask2] = 0x0200(Z);"
100 "%[shift] = 0;"
101 "LSETUP(.Lloop_s, .Lloop_e) LC0 = %[lc];"
102 ".Lloop_s:"
103 "%[tmp] = extract(%[val], %[mask1].L)(Z);"
104 "%[tmp] <<= %[shift];"
105 "%[extr] = %[extr] | %[tmp];"
106 "%[mask1] = %[mask1] - %[mask2];"
107 ".Lloop_e:"
108 "%[shift] += 1;"
109 : [extr]"=&d"(extract), [shift]"=&d"(tmp_shift), [tmp]"=&d"(tmp),
110 [mask1]"=&d"(tmp_mask1), [mask2]"=&d"(tmp_mask2)
111 : [val]"d"(value), [rxmask]"d"(up->rxmask), [lc]"a"(up->csize)
112 : "ASTAT", "LB0", "LC0", "LT0"
113 );
114
115 pr_debug(" extract:%x\n", extract);
116 return extract;
117}
118
119static int sport_uart_setup(struct sport_uart_port *up, int size, int baud_rate)
120{
121 int tclkdiv, rclkdiv;
122 unsigned int sclk = get_sclk();
123
124
125 SPORT_PUT_TCR1(up, (LATFS | ITFS | TFSR | TLSBIT | ITCLK));
126 SPORT_PUT_TCR2(up, size + 1);
127 pr_debug("%s TCR1:%x, TCR2:%x\n", __func__, SPORT_GET_TCR1(up), SPORT_GET_TCR2(up));
128
129
130 SPORT_PUT_RCR1(up, (RCKFE | LARFS | LRFS | RFSR | IRCLK));
131 SPORT_PUT_RCR2(up, (size + 1) * 2 - 1);
132 pr_debug("%s RCR1:%x, RCR2:%x\n", __func__, SPORT_GET_RCR1(up), SPORT_GET_RCR2(up));
133
134 tclkdiv = sclk / (2 * baud_rate) - 1;
135
136
137
138
139
140 rclkdiv = sclk / (2 * baud_rate * 2 * 97 / 100) - 1;
141 SPORT_PUT_TCLKDIV(up, tclkdiv);
142 SPORT_PUT_RCLKDIV(up, rclkdiv);
143 SSYNC();
144 pr_debug("%s sclk:%d, baud_rate:%d, tclkdiv:%d, rclkdiv:%d\n",
145 __func__, sclk, baud_rate, tclkdiv, rclkdiv);
146
147 return 0;
148}
149
150static irqreturn_t sport_uart_rx_irq(int irq, void *dev_id)
151{
152 struct sport_uart_port *up = dev_id;
153 struct tty_port *port = &up->port.state->port;
154 unsigned int ch;
155
156 spin_lock(&up->port.lock);
157
158 while (SPORT_GET_STAT(up) & RXNE) {
159 ch = rx_one_byte(up);
160 up->port.icount.rx++;
161
162 if (!uart_handle_sysrq_char(&up->port, ch))
163 tty_insert_flip_char(port, ch, TTY_NORMAL);
164 }
165
166 spin_unlock(&up->port.lock);
167
168
169 tty_flip_buffer_push(port);
170
171 return IRQ_HANDLED;
172}
173
174static irqreturn_t sport_uart_tx_irq(int irq, void *dev_id)
175{
176 struct sport_uart_port *up = dev_id;
177
178 spin_lock(&up->port.lock);
179 sport_uart_tx_chars(up);
180 spin_unlock(&up->port.lock);
181
182 return IRQ_HANDLED;
183}
184
185static irqreturn_t sport_uart_err_irq(int irq, void *dev_id)
186{
187 struct sport_uart_port *up = dev_id;
188 unsigned int stat = SPORT_GET_STAT(up);
189
190 spin_lock(&up->port.lock);
191
192
193 if (stat & ROVF) {
194 up->port.icount.overrun++;
195 tty_insert_flip_char(&up->port.state->port, 0, TTY_OVERRUN);
196 SPORT_PUT_STAT(up, ROVF);
197 }
198
199 if (stat & (TOVF | TUVF | RUVF)) {
200 pr_err("SPORT Error:%s %s %s\n",
201 (stat & TOVF) ? "TX overflow" : "",
202 (stat & TUVF) ? "TX underflow" : "",
203 (stat & RUVF) ? "RX underflow" : "");
204 SPORT_PUT_TCR1(up, SPORT_GET_TCR1(up) & ~TSPEN);
205 SPORT_PUT_RCR1(up, SPORT_GET_RCR1(up) & ~RSPEN);
206 }
207 SSYNC();
208
209 spin_unlock(&up->port.lock);
210
211
212 return IRQ_HANDLED;
213}
214
215#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS
216static unsigned int sport_get_mctrl(struct uart_port *port)
217{
218 struct sport_uart_port *up = (struct sport_uart_port *)port;
219 if (up->cts_pin < 0)
220 return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
221
222
223 if (SPORT_UART_GET_CTS(up))
224 return TIOCM_CTS | TIOCM_DSR | TIOCM_CAR;
225 else
226 return TIOCM_DSR | TIOCM_CAR;
227}
228
229static void sport_set_mctrl(struct uart_port *port, unsigned int mctrl)
230{
231 struct sport_uart_port *up = (struct sport_uart_port *)port;
232 if (up->rts_pin < 0)
233 return;
234
235
236 if (mctrl & TIOCM_RTS)
237 SPORT_UART_ENABLE_RTS(up);
238 else
239 SPORT_UART_DISABLE_RTS(up);
240}
241
242
243
244
245static irqreturn_t sport_mctrl_cts_int(int irq, void *dev_id)
246{
247 struct sport_uart_port *up = (struct sport_uart_port *)dev_id;
248 unsigned int status;
249
250 status = sport_get_mctrl(&up->port);
251 uart_handle_cts_change(&up->port, status & TIOCM_CTS);
252
253 return IRQ_HANDLED;
254}
255#else
256static unsigned int sport_get_mctrl(struct uart_port *port)
257{
258 pr_debug("%s enter\n", __func__);
259 return TIOCM_CTS | TIOCM_CD | TIOCM_DSR;
260}
261
262static void sport_set_mctrl(struct uart_port *port, unsigned int mctrl)
263{
264 pr_debug("%s enter\n", __func__);
265}
266#endif
267
268
269static int sport_startup(struct uart_port *port)
270{
271 struct sport_uart_port *up = (struct sport_uart_port *)port;
272 int ret;
273
274 pr_debug("%s enter\n", __func__);
275 ret = request_irq(up->port.irq, sport_uart_rx_irq, 0,
276 "SPORT_UART_RX", up);
277 if (ret) {
278 dev_err(port->dev, "unable to request SPORT RX interrupt\n");
279 return ret;
280 }
281
282 ret = request_irq(up->port.irq+1, sport_uart_tx_irq, 0,
283 "SPORT_UART_TX", up);
284 if (ret) {
285 dev_err(port->dev, "unable to request SPORT TX interrupt\n");
286 goto fail1;
287 }
288
289 ret = request_irq(up->err_irq, sport_uart_err_irq, 0,
290 "SPORT_UART_STATUS", up);
291 if (ret) {
292 dev_err(port->dev, "unable to request SPORT status interrupt\n");
293 goto fail2;
294 }
295
296#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS
297 if (up->cts_pin >= 0) {
298 if (request_irq(gpio_to_irq(up->cts_pin),
299 sport_mctrl_cts_int,
300 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
301 0, "BFIN_SPORT_UART_CTS", up)) {
302 up->cts_pin = -1;
303 dev_info(port->dev, "Unable to attach BlackFin UART over SPORT CTS interrupt. So, disable it.\n");
304 }
305 }
306 if (up->rts_pin >= 0) {
307 if (gpio_request(up->rts_pin, DRV_NAME)) {
308 dev_info(port->dev, "fail to request RTS PIN at GPIO_%d\n", up->rts_pin);
309 up->rts_pin = -1;
310 } else
311 gpio_direction_output(up->rts_pin, 0);
312 }
313#endif
314
315 return 0;
316 fail2:
317 free_irq(up->port.irq+1, up);
318 fail1:
319 free_irq(up->port.irq, up);
320
321 return ret;
322}
323
324
325
326
327
328
329
330static int sport_uart_tx_chars(struct sport_uart_port *up)
331{
332 struct circ_buf *xmit = &up->port.state->xmit;
333
334 if (SPORT_GET_STAT(up) & TXF)
335 return 0;
336
337 if (up->port.x_char) {
338 tx_one_byte(up, up->port.x_char);
339 up->port.icount.tx++;
340 up->port.x_char = 0;
341 return 1;
342 }
343
344 if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) {
345
346
347
348
349
350 if (SPORT_GET_STAT(up) & TXHRE)
351 sport_stop_tx(&up->port);
352 return 0;
353 }
354
355 while(!(SPORT_GET_STAT(up) & TXF) && !uart_circ_empty(xmit)) {
356 tx_one_byte(up, xmit->buf[xmit->tail]);
357 xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE -1);
358 up->port.icount.tx++;
359 }
360
361 if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
362 uart_write_wakeup(&up->port);
363
364 return 1;
365}
366
367static unsigned int sport_tx_empty(struct uart_port *port)
368{
369 struct sport_uart_port *up = (struct sport_uart_port *)port;
370 unsigned int stat;
371
372 stat = SPORT_GET_STAT(up);
373 pr_debug("%s stat:%04x\n", __func__, stat);
374 if (stat & TXHRE) {
375 return TIOCSER_TEMT;
376 } else
377 return 0;
378}
379
380static void sport_stop_tx(struct uart_port *port)
381{
382 struct sport_uart_port *up = (struct sport_uart_port *)port;
383
384 pr_debug("%s enter\n", __func__);
385
386 if (!(SPORT_GET_TCR1(up) & TSPEN))
387 return;
388
389
390
391
392
393
394 SPORT_PUT_TX(up, 0xffff);
395 while (!(SPORT_GET_STAT(up) & TXHRE))
396 cpu_relax();
397
398 SPORT_PUT_TCR1(up, (SPORT_GET_TCR1(up) & ~TSPEN));
399 SSYNC();
400
401 return;
402}
403
404static void sport_start_tx(struct uart_port *port)
405{
406 struct sport_uart_port *up = (struct sport_uart_port *)port;
407
408 pr_debug("%s enter\n", __func__);
409
410
411 if (sport_uart_tx_chars(up)) {
412
413 SPORT_PUT_TCR1(up, (SPORT_GET_TCR1(up) | TSPEN));
414 SSYNC();
415 }
416
417 pr_debug("%s exit\n", __func__);
418}
419
420static void sport_stop_rx(struct uart_port *port)
421{
422 struct sport_uart_port *up = (struct sport_uart_port *)port;
423
424 pr_debug("%s enter\n", __func__);
425
426 SPORT_PUT_RCR1(up, (SPORT_GET_RCR1(up) & ~RSPEN));
427 SSYNC();
428}
429
430static void sport_break_ctl(struct uart_port *port, int break_state)
431{
432 pr_debug("%s enter\n", __func__);
433}
434
435static void sport_shutdown(struct uart_port *port)
436{
437 struct sport_uart_port *up = (struct sport_uart_port *)port;
438
439 dev_dbg(port->dev, "%s enter\n", __func__);
440
441
442 SPORT_PUT_TCR1(up, (SPORT_GET_TCR1(up) & ~TSPEN));
443 SPORT_PUT_RCR1(up, (SPORT_GET_RCR1(up) & ~RSPEN));
444 SSYNC();
445
446 free_irq(up->port.irq, up);
447 free_irq(up->port.irq+1, up);
448 free_irq(up->err_irq, up);
449#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS
450 if (up->cts_pin >= 0)
451 free_irq(gpio_to_irq(up->cts_pin), up);
452 if (up->rts_pin >= 0)
453 gpio_free(up->rts_pin);
454#endif
455}
456
457static const char *sport_type(struct uart_port *port)
458{
459 struct sport_uart_port *up = (struct sport_uart_port *)port;
460
461 pr_debug("%s enter\n", __func__);
462 return up->port.type == PORT_BFIN_SPORT ? "BFIN-SPORT-UART" : NULL;
463}
464
465static void sport_release_port(struct uart_port *port)
466{
467 pr_debug("%s enter\n", __func__);
468}
469
470static int sport_request_port(struct uart_port *port)
471{
472 pr_debug("%s enter\n", __func__);
473 return 0;
474}
475
476static void sport_config_port(struct uart_port *port, int flags)
477{
478 struct sport_uart_port *up = (struct sport_uart_port *)port;
479
480 pr_debug("%s enter\n", __func__);
481 up->port.type = PORT_BFIN_SPORT;
482}
483
484static int sport_verify_port(struct uart_port *port, struct serial_struct *ser)
485{
486 pr_debug("%s enter\n", __func__);
487 return 0;
488}
489
490static void sport_set_termios(struct uart_port *port,
491 struct ktermios *termios, struct ktermios *old)
492{
493 struct sport_uart_port *up = (struct sport_uart_port *)port;
494 unsigned long flags;
495 int i;
496
497 pr_debug("%s enter, c_cflag:%08x\n", __func__, termios->c_cflag);
498
499#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS
500 if (old == NULL && up->cts_pin != -1)
501 termios->c_cflag |= CRTSCTS;
502 else if (up->cts_pin == -1)
503 termios->c_cflag &= ~CRTSCTS;
504#endif
505
506 switch (termios->c_cflag & CSIZE) {
507 case CS8:
508 up->csize = 8;
509 break;
510 case CS7:
511 up->csize = 7;
512 break;
513 case CS6:
514 up->csize = 6;
515 break;
516 case CS5:
517 up->csize = 5;
518 break;
519 default:
520 pr_warn("requested word length not supported\n");
521 break;
522 }
523
524 if (termios->c_cflag & CSTOPB) {
525 up->stopb = 1;
526 }
527 if (termios->c_cflag & PARENB) {
528 pr_warn("PAREN bit is not supported yet\n");
529
530 }
531
532 spin_lock_irqsave(&up->port.lock, flags);
533
534 port->read_status_mask = 0;
535
536
537
538
539 port->ignore_status_mask = 0;
540
541
542 up->rxmask = 0x01 | (((up->csize + up->stopb) * 2 - 1) << 0x8);
543
544
545
546
547 for (i = 0, up->txmask1 = 0; i < up->csize; i++)
548 up->txmask1 |= (1<<i);
549 up->txmask2 = (1<<i);
550 if (up->stopb) {
551 ++i;
552 up->txmask2 |= (1<<i);
553 }
554 up->txmask1 <<= 1;
555 up->txmask2 <<= 1;
556
557 port->uartclk = uart_get_baud_rate(port, termios, old, 0, get_sclk()/16);
558
559
560 SPORT_PUT_TCR1(up, SPORT_GET_TCR1(up) & ~TSPEN);
561 SPORT_PUT_RCR1(up, SPORT_GET_RCR1(up) & ~RSPEN);
562
563 sport_uart_setup(up, up->csize + up->stopb, port->uartclk);
564
565
566
567
568 SPORT_PUT_TX(up, 0xffff);
569 SPORT_PUT_TX(up, 0xffff);
570 SPORT_PUT_TCR1(up, (SPORT_GET_TCR1(up) | TSPEN));
571 SSYNC();
572 while (!(SPORT_GET_STAT(up) & TXHRE))
573 cpu_relax();
574 SPORT_PUT_TCR1(up, SPORT_GET_TCR1(up) & ~TSPEN);
575 SSYNC();
576
577
578 uart_update_timeout(port, termios->c_cflag, port->uartclk);
579
580
581 SPORT_PUT_RCR1(up, SPORT_GET_RCR1(up) | RSPEN);
582 SSYNC();
583
584 spin_unlock_irqrestore(&up->port.lock, flags);
585}
586
587struct uart_ops sport_uart_ops = {
588 .tx_empty = sport_tx_empty,
589 .set_mctrl = sport_set_mctrl,
590 .get_mctrl = sport_get_mctrl,
591 .stop_tx = sport_stop_tx,
592 .start_tx = sport_start_tx,
593 .stop_rx = sport_stop_rx,
594 .break_ctl = sport_break_ctl,
595 .startup = sport_startup,
596 .shutdown = sport_shutdown,
597 .set_termios = sport_set_termios,
598 .type = sport_type,
599 .release_port = sport_release_port,
600 .request_port = sport_request_port,
601 .config_port = sport_config_port,
602 .verify_port = sport_verify_port,
603};
604
605#define BFIN_SPORT_UART_MAX_PORTS 4
606
607static struct sport_uart_port *bfin_sport_uart_ports[BFIN_SPORT_UART_MAX_PORTS];
608
609#ifdef CONFIG_SERIAL_BFIN_SPORT_CONSOLE
610#define CLASS_BFIN_SPORT_CONSOLE "bfin-sport-console"
611
612static int __init
613sport_uart_console_setup(struct console *co, char *options)
614{
615 struct sport_uart_port *up;
616 int baud = 57600;
617 int bits = 8;
618 int parity = 'n';
619# ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS
620 int flow = 'r';
621# else
622 int flow = 'n';
623# endif
624
625
626 if (co->index < 0 || co->index >= BFIN_SPORT_UART_MAX_PORTS)
627 return -ENODEV;
628
629 up = bfin_sport_uart_ports[co->index];
630 if (!up)
631 return -ENODEV;
632
633 if (options)
634 uart_parse_options(options, &baud, &parity, &bits, &flow);
635
636 return uart_set_options(&up->port, co, baud, parity, bits, flow);
637}
638
639static void sport_uart_console_putchar(struct uart_port *port, int ch)
640{
641 struct sport_uart_port *up = (struct sport_uart_port *)port;
642
643 while (SPORT_GET_STAT(up) & TXF)
644 barrier();
645
646 tx_one_byte(up, ch);
647}
648
649
650
651
652static void
653sport_uart_console_write(struct console *co, const char *s, unsigned int count)
654{
655 struct sport_uart_port *up = bfin_sport_uart_ports[co->index];
656 unsigned long flags;
657
658 spin_lock_irqsave(&up->port.lock, flags);
659
660 if (SPORT_GET_TCR1(up) & TSPEN)
661 uart_console_write(&up->port, s, count, sport_uart_console_putchar);
662 else {
663
664 while (SPORT_GET_STAT(up) & TXF)
665 barrier();
666 SPORT_PUT_TX(up, 0xffff);
667
668 SPORT_PUT_TCR1(up, (SPORT_GET_TCR1(up) | TSPEN));
669 SSYNC();
670
671 uart_console_write(&up->port, s, count, sport_uart_console_putchar);
672
673
674
675
676
677
678 while (SPORT_GET_STAT(up) & TXF)
679 barrier();
680 SPORT_PUT_TX(up, 0xffff);
681 while (!(SPORT_GET_STAT(up) & TXHRE))
682 barrier();
683
684
685 SPORT_PUT_TCR1(up, (SPORT_GET_TCR1(up) & ~TSPEN));
686 SSYNC();
687 }
688
689 spin_unlock_irqrestore(&up->port.lock, flags);
690}
691
692static struct uart_driver sport_uart_reg;
693
694static struct console sport_uart_console = {
695 .name = DEVICE_NAME,
696 .write = sport_uart_console_write,
697 .device = uart_console_device,
698 .setup = sport_uart_console_setup,
699 .flags = CON_PRINTBUFFER,
700 .index = -1,
701 .data = &sport_uart_reg,
702};
703
704#define SPORT_UART_CONSOLE (&sport_uart_console)
705#else
706#define SPORT_UART_CONSOLE NULL
707#endif
708
709
710static struct uart_driver sport_uart_reg = {
711 .owner = THIS_MODULE,
712 .driver_name = DRV_NAME,
713 .dev_name = DEVICE_NAME,
714 .major = 204,
715 .minor = 84,
716 .nr = BFIN_SPORT_UART_MAX_PORTS,
717 .cons = SPORT_UART_CONSOLE,
718};
719
720#ifdef CONFIG_PM
721static int sport_uart_suspend(struct device *dev)
722{
723 struct sport_uart_port *sport = dev_get_drvdata(dev);
724
725 dev_dbg(dev, "%s enter\n", __func__);
726 if (sport)
727 uart_suspend_port(&sport_uart_reg, &sport->port);
728
729 return 0;
730}
731
732static int sport_uart_resume(struct device *dev)
733{
734 struct sport_uart_port *sport = dev_get_drvdata(dev);
735
736 dev_dbg(dev, "%s enter\n", __func__);
737 if (sport)
738 uart_resume_port(&sport_uart_reg, &sport->port);
739
740 return 0;
741}
742
743static struct dev_pm_ops bfin_sport_uart_dev_pm_ops = {
744 .suspend = sport_uart_suspend,
745 .resume = sport_uart_resume,
746};
747#endif
748
749static int sport_uart_probe(struct platform_device *pdev)
750{
751 struct resource *res;
752 struct sport_uart_port *sport;
753 int ret = 0;
754
755 dev_dbg(&pdev->dev, "%s enter\n", __func__);
756
757 if (pdev->id < 0 || pdev->id >= BFIN_SPORT_UART_MAX_PORTS) {
758 dev_err(&pdev->dev, "Wrong sport uart platform device id.\n");
759 return -ENOENT;
760 }
761
762 if (bfin_sport_uart_ports[pdev->id] == NULL) {
763 bfin_sport_uart_ports[pdev->id] =
764 kzalloc(sizeof(struct sport_uart_port), GFP_KERNEL);
765 sport = bfin_sport_uart_ports[pdev->id];
766 if (!sport) {
767 dev_err(&pdev->dev,
768 "Fail to malloc sport_uart_port\n");
769 return -ENOMEM;
770 }
771
772 ret = peripheral_request_list(dev_get_platdata(&pdev->dev),
773 DRV_NAME);
774 if (ret) {
775 dev_err(&pdev->dev,
776 "Fail to request SPORT peripherals\n");
777 goto out_error_free_mem;
778 }
779
780 spin_lock_init(&sport->port.lock);
781 sport->port.fifosize = SPORT_TX_FIFO_SIZE,
782 sport->port.ops = &sport_uart_ops;
783 sport->port.line = pdev->id;
784 sport->port.iotype = UPIO_MEM;
785 sport->port.flags = UPF_BOOT_AUTOCONF;
786
787 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
788 if (res == NULL) {
789 dev_err(&pdev->dev, "Cannot get IORESOURCE_MEM\n");
790 ret = -ENOENT;
791 goto out_error_free_peripherals;
792 }
793
794 sport->port.membase = ioremap(res->start, resource_size(res));
795 if (!sport->port.membase) {
796 dev_err(&pdev->dev, "Cannot map sport IO\n");
797 ret = -ENXIO;
798 goto out_error_free_peripherals;
799 }
800 sport->port.mapbase = res->start;
801
802 sport->port.irq = platform_get_irq(pdev, 0);
803 if ((int)sport->port.irq < 0) {
804 dev_err(&pdev->dev, "No sport RX/TX IRQ specified\n");
805 ret = -ENOENT;
806 goto out_error_unmap;
807 }
808
809 sport->err_irq = platform_get_irq(pdev, 1);
810 if (sport->err_irq < 0) {
811 dev_err(&pdev->dev, "No sport status IRQ specified\n");
812 ret = -ENOENT;
813 goto out_error_unmap;
814 }
815#ifdef CONFIG_SERIAL_BFIN_SPORT_CTSRTS
816 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
817 if (res == NULL)
818 sport->cts_pin = -1;
819 else
820 sport->cts_pin = res->start;
821
822 res = platform_get_resource(pdev, IORESOURCE_IO, 1);
823 if (res == NULL)
824 sport->rts_pin = -1;
825 else
826 sport->rts_pin = res->start;
827#endif
828 }
829
830#ifdef CONFIG_SERIAL_BFIN_SPORT_CONSOLE
831 if (!is_early_platform_device(pdev)) {
832#endif
833 sport = bfin_sport_uart_ports[pdev->id];
834 sport->port.dev = &pdev->dev;
835 dev_set_drvdata(&pdev->dev, sport);
836 ret = uart_add_one_port(&sport_uart_reg, &sport->port);
837#ifdef CONFIG_SERIAL_BFIN_SPORT_CONSOLE
838 }
839#endif
840 if (!ret)
841 return 0;
842
843 if (sport) {
844out_error_unmap:
845 iounmap(sport->port.membase);
846out_error_free_peripherals:
847 peripheral_free_list(dev_get_platdata(&pdev->dev));
848out_error_free_mem:
849 kfree(sport);
850 bfin_sport_uart_ports[pdev->id] = NULL;
851 }
852
853 return ret;
854}
855
856static int sport_uart_remove(struct platform_device *pdev)
857{
858 struct sport_uart_port *sport = platform_get_drvdata(pdev);
859
860 dev_dbg(&pdev->dev, "%s enter\n", __func__);
861 dev_set_drvdata(&pdev->dev, NULL);
862
863 if (sport) {
864 uart_remove_one_port(&sport_uart_reg, &sport->port);
865 iounmap(sport->port.membase);
866 peripheral_free_list(dev_get_platdata(&pdev->dev));
867 kfree(sport);
868 bfin_sport_uart_ports[pdev->id] = NULL;
869 }
870
871 return 0;
872}
873
874static struct platform_driver sport_uart_driver = {
875 .probe = sport_uart_probe,
876 .remove = sport_uart_remove,
877 .driver = {
878 .name = DRV_NAME,
879#ifdef CONFIG_PM
880 .pm = &bfin_sport_uart_dev_pm_ops,
881#endif
882 },
883};
884
885#ifdef CONFIG_SERIAL_BFIN_SPORT_CONSOLE
886static struct early_platform_driver early_sport_uart_driver __initdata = {
887 .class_str = CLASS_BFIN_SPORT_CONSOLE,
888 .pdrv = &sport_uart_driver,
889 .requested_id = EARLY_PLATFORM_ID_UNSET,
890};
891
892static int __init sport_uart_rs_console_init(void)
893{
894 early_platform_driver_register(&early_sport_uart_driver, DRV_NAME);
895
896 early_platform_driver_probe(CLASS_BFIN_SPORT_CONSOLE,
897 BFIN_SPORT_UART_MAX_PORTS, 0);
898
899 register_console(&sport_uart_console);
900
901 return 0;
902}
903console_initcall(sport_uart_rs_console_init);
904#endif
905
906static int __init sport_uart_init(void)
907{
908 int ret;
909
910 pr_info("Blackfin uart over sport driver\n");
911
912 ret = uart_register_driver(&sport_uart_reg);
913 if (ret) {
914 pr_err("failed to register %s:%d\n",
915 sport_uart_reg.driver_name, ret);
916 return ret;
917 }
918
919 ret = platform_driver_register(&sport_uart_driver);
920 if (ret) {
921 pr_err("failed to register sport uart driver:%d\n", ret);
922 uart_unregister_driver(&sport_uart_reg);
923 }
924
925 return ret;
926}
927module_init(sport_uart_init);
928
929static void __exit sport_uart_exit(void)
930{
931 platform_driver_unregister(&sport_uart_driver);
932 uart_unregister_driver(&sport_uart_reg);
933}
934module_exit(sport_uart_exit);
935
936MODULE_AUTHOR("Sonic Zhang, Roy Huang");
937MODULE_DESCRIPTION("Blackfin serial over SPORT driver");
938MODULE_LICENSE("GPL");
939
