diff options
Diffstat (limited to 'drivers/tty/serial/sc26xx.c')
-rw-r--r-- | drivers/tty/serial/sc26xx.c | 757 |
1 files changed, 757 insertions, 0 deletions
diff --git a/drivers/tty/serial/sc26xx.c b/drivers/tty/serial/sc26xx.c new file mode 100644 index 000000000000..75038ad2b242 --- /dev/null +++ b/drivers/tty/serial/sc26xx.c | |||
@@ -0,0 +1,757 @@ | |||
1 | /* | ||
2 | * SC268xx.c: Serial driver for Philiphs SC2681/SC2692 devices. | ||
3 | * | ||
4 | * Copyright (C) 2006,2007 Thomas Bogendörfer (tsbogend@alpha.franken.de) | ||
5 | */ | ||
6 | |||
7 | #include <linux/module.h> | ||
8 | #include <linux/kernel.h> | ||
9 | #include <linux/errno.h> | ||
10 | #include <linux/tty.h> | ||
11 | #include <linux/tty_flip.h> | ||
12 | #include <linux/major.h> | ||
13 | #include <linux/circ_buf.h> | ||
14 | #include <linux/serial.h> | ||
15 | #include <linux/sysrq.h> | ||
16 | #include <linux/console.h> | ||
17 | #include <linux/spinlock.h> | ||
18 | #include <linux/slab.h> | ||
19 | #include <linux/delay.h> | ||
20 | #include <linux/init.h> | ||
21 | #include <linux/platform_device.h> | ||
22 | #include <linux/irq.h> | ||
23 | |||
24 | #if defined(CONFIG_MAGIC_SYSRQ) | ||
25 | #define SUPPORT_SYSRQ | ||
26 | #endif | ||
27 | |||
28 | #include <linux/serial_core.h> | ||
29 | |||
30 | #define SC26XX_MAJOR 204 | ||
31 | #define SC26XX_MINOR_START 205 | ||
32 | #define SC26XX_NR 2 | ||
33 | |||
34 | struct uart_sc26xx_port { | ||
35 | struct uart_port port[2]; | ||
36 | u8 dsr_mask[2]; | ||
37 | u8 cts_mask[2]; | ||
38 | u8 dcd_mask[2]; | ||
39 | u8 ri_mask[2]; | ||
40 | u8 dtr_mask[2]; | ||
41 | u8 rts_mask[2]; | ||
42 | u8 imr; | ||
43 | }; | ||
44 | |||
45 | /* register common to both ports */ | ||
46 | #define RD_ISR 0x14 | ||
47 | #define RD_IPR 0x34 | ||
48 | |||
49 | #define WR_ACR 0x10 | ||
50 | #define WR_IMR 0x14 | ||
51 | #define WR_OPCR 0x34 | ||
52 | #define WR_OPR_SET 0x38 | ||
53 | #define WR_OPR_CLR 0x3C | ||
54 | |||
55 | /* access common register */ | ||
56 | #define READ_SC(p, r) readb((p)->membase + RD_##r) | ||
57 | #define WRITE_SC(p, r, v) writeb((v), (p)->membase + WR_##r) | ||
58 | |||
59 | /* register per port */ | ||
60 | #define RD_PORT_MRx 0x00 | ||
61 | #define RD_PORT_SR 0x04 | ||
62 | #define RD_PORT_RHR 0x0c | ||
63 | |||
64 | #define WR_PORT_MRx 0x00 | ||
65 | #define WR_PORT_CSR 0x04 | ||
66 | #define WR_PORT_CR 0x08 | ||
67 | #define WR_PORT_THR 0x0c | ||
68 | |||
69 | /* SR bits */ | ||
70 | #define SR_BREAK (1 << 7) | ||
71 | #define SR_FRAME (1 << 6) | ||
72 | #define SR_PARITY (1 << 5) | ||
73 | #define SR_OVERRUN (1 << 4) | ||
74 | #define SR_TXRDY (1 << 2) | ||
75 | #define SR_RXRDY (1 << 0) | ||
76 | |||
77 | #define CR_RES_MR (1 << 4) | ||
78 | #define CR_RES_RX (2 << 4) | ||
79 | #define CR_RES_TX (3 << 4) | ||
80 | #define CR_STRT_BRK (6 << 4) | ||
81 | #define CR_STOP_BRK (7 << 4) | ||
82 | #define CR_DIS_TX (1 << 3) | ||
83 | #define CR_ENA_TX (1 << 2) | ||
84 | #define CR_DIS_RX (1 << 1) | ||
85 | #define CR_ENA_RX (1 << 0) | ||
86 | |||
87 | /* ISR bits */ | ||
88 | #define ISR_RXRDYB (1 << 5) | ||
89 | #define ISR_TXRDYB (1 << 4) | ||
90 | #define ISR_RXRDYA (1 << 1) | ||
91 | #define ISR_TXRDYA (1 << 0) | ||
92 | |||
93 | /* IMR bits */ | ||
94 | #define IMR_RXRDY (1 << 1) | ||
95 | #define IMR_TXRDY (1 << 0) | ||
96 | |||
97 | /* access port register */ | ||
98 | static inline u8 read_sc_port(struct uart_port *p, u8 reg) | ||
99 | { | ||
100 | return readb(p->membase + p->line * 0x20 + reg); | ||
101 | } | ||
102 | |||
103 | static inline void write_sc_port(struct uart_port *p, u8 reg, u8 val) | ||
104 | { | ||
105 | writeb(val, p->membase + p->line * 0x20 + reg); | ||
106 | } | ||
107 | |||
108 | #define READ_SC_PORT(p, r) read_sc_port(p, RD_PORT_##r) | ||
109 | #define WRITE_SC_PORT(p, r, v) write_sc_port(p, WR_PORT_##r, v) | ||
110 | |||
111 | static void sc26xx_enable_irq(struct uart_port *port, int mask) | ||
112 | { | ||
113 | struct uart_sc26xx_port *up; | ||
114 | int line = port->line; | ||
115 | |||
116 | port -= line; | ||
117 | up = container_of(port, struct uart_sc26xx_port, port[0]); | ||
118 | |||
119 | up->imr |= mask << (line * 4); | ||
120 | WRITE_SC(port, IMR, up->imr); | ||
121 | } | ||
122 | |||
123 | static void sc26xx_disable_irq(struct uart_port *port, int mask) | ||
124 | { | ||
125 | struct uart_sc26xx_port *up; | ||
126 | int line = port->line; | ||
127 | |||
128 | port -= line; | ||
129 | up = container_of(port, struct uart_sc26xx_port, port[0]); | ||
130 | |||
131 | up->imr &= ~(mask << (line * 4)); | ||
132 | WRITE_SC(port, IMR, up->imr); | ||
133 | } | ||
134 | |||
135 | static struct tty_struct *receive_chars(struct uart_port *port) | ||
136 | { | ||
137 | struct tty_struct *tty = NULL; | ||
138 | int limit = 10000; | ||
139 | unsigned char ch; | ||
140 | char flag; | ||
141 | u8 status; | ||
142 | |||
143 | if (port->state != NULL) /* Unopened serial console */ | ||
144 | tty = port->state->port.tty; | ||
145 | |||
146 | while (limit-- > 0) { | ||
147 | status = READ_SC_PORT(port, SR); | ||
148 | if (!(status & SR_RXRDY)) | ||
149 | break; | ||
150 | ch = READ_SC_PORT(port, RHR); | ||
151 | |||
152 | flag = TTY_NORMAL; | ||
153 | port->icount.rx++; | ||
154 | |||
155 | if (unlikely(status & (SR_BREAK | SR_FRAME | | ||
156 | SR_PARITY | SR_OVERRUN))) { | ||
157 | if (status & SR_BREAK) { | ||
158 | status &= ~(SR_PARITY | SR_FRAME); | ||
159 | port->icount.brk++; | ||
160 | if (uart_handle_break(port)) | ||
161 | continue; | ||
162 | } else if (status & SR_PARITY) | ||
163 | port->icount.parity++; | ||
164 | else if (status & SR_FRAME) | ||
165 | port->icount.frame++; | ||
166 | if (status & SR_OVERRUN) | ||
167 | port->icount.overrun++; | ||
168 | |||
169 | status &= port->read_status_mask; | ||
170 | if (status & SR_BREAK) | ||
171 | flag = TTY_BREAK; | ||
172 | else if (status & SR_PARITY) | ||
173 | flag = TTY_PARITY; | ||
174 | else if (status & SR_FRAME) | ||
175 | flag = TTY_FRAME; | ||
176 | } | ||
177 | |||
178 | if (uart_handle_sysrq_char(port, ch)) | ||
179 | continue; | ||
180 | |||
181 | if (status & port->ignore_status_mask) | ||
182 | continue; | ||
183 | |||
184 | tty_insert_flip_char(tty, ch, flag); | ||
185 | } | ||
186 | return tty; | ||
187 | } | ||
188 | |||
189 | static void transmit_chars(struct uart_port *port) | ||
190 | { | ||
191 | struct circ_buf *xmit; | ||
192 | |||
193 | if (!port->state) | ||
194 | return; | ||
195 | |||
196 | xmit = &port->state->xmit; | ||
197 | if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { | ||
198 | sc26xx_disable_irq(port, IMR_TXRDY); | ||
199 | return; | ||
200 | } | ||
201 | while (!uart_circ_empty(xmit)) { | ||
202 | if (!(READ_SC_PORT(port, SR) & SR_TXRDY)) | ||
203 | break; | ||
204 | |||
205 | WRITE_SC_PORT(port, THR, xmit->buf[xmit->tail]); | ||
206 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); | ||
207 | port->icount.tx++; | ||
208 | } | ||
209 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | ||
210 | uart_write_wakeup(port); | ||
211 | } | ||
212 | |||
213 | static irqreturn_t sc26xx_interrupt(int irq, void *dev_id) | ||
214 | { | ||
215 | struct uart_sc26xx_port *up = dev_id; | ||
216 | struct tty_struct *tty; | ||
217 | unsigned long flags; | ||
218 | u8 isr; | ||
219 | |||
220 | spin_lock_irqsave(&up->port[0].lock, flags); | ||
221 | |||
222 | tty = NULL; | ||
223 | isr = READ_SC(&up->port[0], ISR); | ||
224 | if (isr & ISR_TXRDYA) | ||
225 | transmit_chars(&up->port[0]); | ||
226 | if (isr & ISR_RXRDYA) | ||
227 | tty = receive_chars(&up->port[0]); | ||
228 | |||
229 | spin_unlock(&up->port[0].lock); | ||
230 | |||
231 | if (tty) | ||
232 | tty_flip_buffer_push(tty); | ||
233 | |||
234 | spin_lock(&up->port[1].lock); | ||
235 | |||
236 | tty = NULL; | ||
237 | if (isr & ISR_TXRDYB) | ||
238 | transmit_chars(&up->port[1]); | ||
239 | if (isr & ISR_RXRDYB) | ||
240 | tty = receive_chars(&up->port[1]); | ||
241 | |||
242 | spin_unlock_irqrestore(&up->port[1].lock, flags); | ||
243 | |||
244 | if (tty) | ||
245 | tty_flip_buffer_push(tty); | ||
246 | |||
247 | return IRQ_HANDLED; | ||
248 | } | ||
249 | |||
250 | /* port->lock is not held. */ | ||
251 | static unsigned int sc26xx_tx_empty(struct uart_port *port) | ||
252 | { | ||
253 | return (READ_SC_PORT(port, SR) & SR_TXRDY) ? TIOCSER_TEMT : 0; | ||
254 | } | ||
255 | |||
256 | /* port->lock held by caller. */ | ||
257 | static void sc26xx_set_mctrl(struct uart_port *port, unsigned int mctrl) | ||
258 | { | ||
259 | struct uart_sc26xx_port *up; | ||
260 | int line = port->line; | ||
261 | |||
262 | port -= line; | ||
263 | up = container_of(port, struct uart_sc26xx_port, port[0]); | ||
264 | |||
265 | if (up->dtr_mask[line]) { | ||
266 | if (mctrl & TIOCM_DTR) | ||
267 | WRITE_SC(port, OPR_SET, up->dtr_mask[line]); | ||
268 | else | ||
269 | WRITE_SC(port, OPR_CLR, up->dtr_mask[line]); | ||
270 | } | ||
271 | if (up->rts_mask[line]) { | ||
272 | if (mctrl & TIOCM_RTS) | ||
273 | WRITE_SC(port, OPR_SET, up->rts_mask[line]); | ||
274 | else | ||
275 | WRITE_SC(port, OPR_CLR, up->rts_mask[line]); | ||
276 | } | ||
277 | } | ||
278 | |||
279 | /* port->lock is held by caller and interrupts are disabled. */ | ||
280 | static unsigned int sc26xx_get_mctrl(struct uart_port *port) | ||
281 | { | ||
282 | struct uart_sc26xx_port *up; | ||
283 | int line = port->line; | ||
284 | unsigned int mctrl = TIOCM_DSR | TIOCM_CTS | TIOCM_CAR; | ||
285 | u8 ipr; | ||
286 | |||
287 | port -= line; | ||
288 | up = container_of(port, struct uart_sc26xx_port, port[0]); | ||
289 | ipr = READ_SC(port, IPR) ^ 0xff; | ||
290 | |||
291 | if (up->dsr_mask[line]) { | ||
292 | mctrl &= ~TIOCM_DSR; | ||
293 | mctrl |= ipr & up->dsr_mask[line] ? TIOCM_DSR : 0; | ||
294 | } | ||
295 | if (up->cts_mask[line]) { | ||
296 | mctrl &= ~TIOCM_CTS; | ||
297 | mctrl |= ipr & up->cts_mask[line] ? TIOCM_CTS : 0; | ||
298 | } | ||
299 | if (up->dcd_mask[line]) { | ||
300 | mctrl &= ~TIOCM_CAR; | ||
301 | mctrl |= ipr & up->dcd_mask[line] ? TIOCM_CAR : 0; | ||
302 | } | ||
303 | if (up->ri_mask[line]) { | ||
304 | mctrl &= ~TIOCM_RNG; | ||
305 | mctrl |= ipr & up->ri_mask[line] ? TIOCM_RNG : 0; | ||
306 | } | ||
307 | return mctrl; | ||
308 | } | ||
309 | |||
310 | /* port->lock held by caller. */ | ||
311 | static void sc26xx_stop_tx(struct uart_port *port) | ||
312 | { | ||
313 | return; | ||
314 | } | ||
315 | |||
316 | /* port->lock held by caller. */ | ||
317 | static void sc26xx_start_tx(struct uart_port *port) | ||
318 | { | ||
319 | struct circ_buf *xmit = &port->state->xmit; | ||
320 | |||
321 | while (!uart_circ_empty(xmit)) { | ||
322 | if (!(READ_SC_PORT(port, SR) & SR_TXRDY)) { | ||
323 | sc26xx_enable_irq(port, IMR_TXRDY); | ||
324 | break; | ||
325 | } | ||
326 | WRITE_SC_PORT(port, THR, xmit->buf[xmit->tail]); | ||
327 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); | ||
328 | port->icount.tx++; | ||
329 | } | ||
330 | } | ||
331 | |||
332 | /* port->lock held by caller. */ | ||
333 | static void sc26xx_stop_rx(struct uart_port *port) | ||
334 | { | ||
335 | } | ||
336 | |||
337 | /* port->lock held by caller. */ | ||
338 | static void sc26xx_enable_ms(struct uart_port *port) | ||
339 | { | ||
340 | } | ||
341 | |||
342 | /* port->lock is not held. */ | ||
343 | static void sc26xx_break_ctl(struct uart_port *port, int break_state) | ||
344 | { | ||
345 | if (break_state == -1) | ||
346 | WRITE_SC_PORT(port, CR, CR_STRT_BRK); | ||
347 | else | ||
348 | WRITE_SC_PORT(port, CR, CR_STOP_BRK); | ||
349 | } | ||
350 | |||
351 | /* port->lock is not held. */ | ||
352 | static int sc26xx_startup(struct uart_port *port) | ||
353 | { | ||
354 | sc26xx_disable_irq(port, IMR_TXRDY | IMR_RXRDY); | ||
355 | WRITE_SC(port, OPCR, 0); | ||
356 | |||
357 | /* reset tx and rx */ | ||
358 | WRITE_SC_PORT(port, CR, CR_RES_RX); | ||
359 | WRITE_SC_PORT(port, CR, CR_RES_TX); | ||
360 | |||
361 | /* start rx/tx */ | ||
362 | WRITE_SC_PORT(port, CR, CR_ENA_TX | CR_ENA_RX); | ||
363 | |||
364 | /* enable irqs */ | ||
365 | sc26xx_enable_irq(port, IMR_RXRDY); | ||
366 | return 0; | ||
367 | } | ||
368 | |||
369 | /* port->lock is not held. */ | ||
370 | static void sc26xx_shutdown(struct uart_port *port) | ||
371 | { | ||
372 | /* disable interrupst */ | ||
373 | sc26xx_disable_irq(port, IMR_TXRDY | IMR_RXRDY); | ||
374 | |||
375 | /* stop tx/rx */ | ||
376 | WRITE_SC_PORT(port, CR, CR_DIS_TX | CR_DIS_RX); | ||
377 | } | ||
378 | |||
379 | /* port->lock is not held. */ | ||
380 | static void sc26xx_set_termios(struct uart_port *port, struct ktermios *termios, | ||
381 | struct ktermios *old) | ||
382 | { | ||
383 | unsigned int baud = uart_get_baud_rate(port, termios, old, 0, 4000000); | ||
384 | unsigned int quot = uart_get_divisor(port, baud); | ||
385 | unsigned int iflag, cflag; | ||
386 | unsigned long flags; | ||
387 | u8 mr1, mr2, csr; | ||
388 | |||
389 | spin_lock_irqsave(&port->lock, flags); | ||
390 | |||
391 | while ((READ_SC_PORT(port, SR) & ((1 << 3) | (1 << 2))) != 0xc) | ||
392 | udelay(2); | ||
393 | |||
394 | WRITE_SC_PORT(port, CR, CR_DIS_TX | CR_DIS_RX); | ||
395 | |||
396 | iflag = termios->c_iflag; | ||
397 | cflag = termios->c_cflag; | ||
398 | |||
399 | port->read_status_mask = SR_OVERRUN; | ||
400 | if (iflag & INPCK) | ||
401 | port->read_status_mask |= SR_PARITY | SR_FRAME; | ||
402 | if (iflag & (BRKINT | PARMRK)) | ||
403 | port->read_status_mask |= SR_BREAK; | ||
404 | |||
405 | port->ignore_status_mask = 0; | ||
406 | if (iflag & IGNBRK) | ||
407 | port->ignore_status_mask |= SR_BREAK; | ||
408 | if ((cflag & CREAD) == 0) | ||
409 | port->ignore_status_mask |= SR_BREAK | SR_FRAME | | ||
410 | SR_PARITY | SR_OVERRUN; | ||
411 | |||
412 | switch (cflag & CSIZE) { | ||
413 | case CS5: | ||
414 | mr1 = 0x00; | ||
415 | break; | ||
416 | case CS6: | ||
417 | mr1 = 0x01; | ||
418 | break; | ||
419 | case CS7: | ||
420 | mr1 = 0x02; | ||
421 | break; | ||
422 | default: | ||
423 | case CS8: | ||
424 | mr1 = 0x03; | ||
425 | break; | ||
426 | } | ||
427 | mr2 = 0x07; | ||
428 | if (cflag & CSTOPB) | ||
429 | mr2 = 0x0f; | ||
430 | if (cflag & PARENB) { | ||
431 | if (cflag & PARODD) | ||
432 | mr1 |= (1 << 2); | ||
433 | } else | ||
434 | mr1 |= (2 << 3); | ||
435 | |||
436 | switch (baud) { | ||
437 | case 50: | ||
438 | csr = 0x00; | ||
439 | break; | ||
440 | case 110: | ||
441 | csr = 0x11; | ||
442 | break; | ||
443 | case 134: | ||
444 | csr = 0x22; | ||
445 | break; | ||
446 | case 200: | ||
447 | csr = 0x33; | ||
448 | break; | ||
449 | case 300: | ||
450 | csr = 0x44; | ||
451 | break; | ||
452 | case 600: | ||
453 | csr = 0x55; | ||
454 | break; | ||
455 | case 1200: | ||
456 | csr = 0x66; | ||
457 | break; | ||
458 | case 2400: | ||
459 | csr = 0x88; | ||
460 | break; | ||
461 | case 4800: | ||
462 | csr = 0x99; | ||
463 | break; | ||
464 | default: | ||
465 | case 9600: | ||
466 | csr = 0xbb; | ||
467 | break; | ||
468 | case 19200: | ||
469 | csr = 0xcc; | ||
470 | break; | ||
471 | } | ||
472 | |||
473 | WRITE_SC_PORT(port, CR, CR_RES_MR); | ||
474 | WRITE_SC_PORT(port, MRx, mr1); | ||
475 | WRITE_SC_PORT(port, MRx, mr2); | ||
476 | |||
477 | WRITE_SC(port, ACR, 0x80); | ||
478 | WRITE_SC_PORT(port, CSR, csr); | ||
479 | |||
480 | /* reset tx and rx */ | ||
481 | WRITE_SC_PORT(port, CR, CR_RES_RX); | ||
482 | WRITE_SC_PORT(port, CR, CR_RES_TX); | ||
483 | |||
484 | WRITE_SC_PORT(port, CR, CR_ENA_TX | CR_ENA_RX); | ||
485 | while ((READ_SC_PORT(port, SR) & ((1 << 3) | (1 << 2))) != 0xc) | ||
486 | udelay(2); | ||
487 | |||
488 | /* XXX */ | ||
489 | uart_update_timeout(port, cflag, | ||
490 | (port->uartclk / (16 * quot))); | ||
491 | |||
492 | spin_unlock_irqrestore(&port->lock, flags); | ||
493 | } | ||
494 | |||
495 | static const char *sc26xx_type(struct uart_port *port) | ||
496 | { | ||
497 | return "SC26XX"; | ||
498 | } | ||
499 | |||
500 | static void sc26xx_release_port(struct uart_port *port) | ||
501 | { | ||
502 | } | ||
503 | |||
504 | static int sc26xx_request_port(struct uart_port *port) | ||
505 | { | ||
506 | return 0; | ||
507 | } | ||
508 | |||
509 | static void sc26xx_config_port(struct uart_port *port, int flags) | ||
510 | { | ||
511 | } | ||
512 | |||
513 | static int sc26xx_verify_port(struct uart_port *port, struct serial_struct *ser) | ||
514 | { | ||
515 | return -EINVAL; | ||
516 | } | ||
517 | |||
518 | static struct uart_ops sc26xx_ops = { | ||
519 | .tx_empty = sc26xx_tx_empty, | ||
520 | .set_mctrl = sc26xx_set_mctrl, | ||
521 | .get_mctrl = sc26xx_get_mctrl, | ||
522 | .stop_tx = sc26xx_stop_tx, | ||
523 | .start_tx = sc26xx_start_tx, | ||
524 | .stop_rx = sc26xx_stop_rx, | ||
525 | .enable_ms = sc26xx_enable_ms, | ||
526 | .break_ctl = sc26xx_break_ctl, | ||
527 | .startup = sc26xx_startup, | ||
528 | .shutdown = sc26xx_shutdown, | ||
529 | .set_termios = sc26xx_set_termios, | ||
530 | .type = sc26xx_type, | ||
531 | .release_port = sc26xx_release_port, | ||
532 | .request_port = sc26xx_request_port, | ||
533 | .config_port = sc26xx_config_port, | ||
534 | .verify_port = sc26xx_verify_port, | ||
535 | }; | ||
536 | |||
537 | static struct uart_port *sc26xx_port; | ||
538 | |||
539 | #ifdef CONFIG_SERIAL_SC26XX_CONSOLE | ||
540 | static void sc26xx_console_putchar(struct uart_port *port, char c) | ||
541 | { | ||
542 | unsigned long flags; | ||
543 | int limit = 1000000; | ||
544 | |||
545 | spin_lock_irqsave(&port->lock, flags); | ||
546 | |||
547 | while (limit-- > 0) { | ||
548 | if (READ_SC_PORT(port, SR) & SR_TXRDY) { | ||
549 | WRITE_SC_PORT(port, THR, c); | ||
550 | break; | ||
551 | } | ||
552 | udelay(2); | ||
553 | } | ||
554 | |||
555 | spin_unlock_irqrestore(&port->lock, flags); | ||
556 | } | ||
557 | |||
558 | static void sc26xx_console_write(struct console *con, const char *s, unsigned n) | ||
559 | { | ||
560 | struct uart_port *port = sc26xx_port; | ||
561 | int i; | ||
562 | |||
563 | for (i = 0; i < n; i++) { | ||
564 | if (*s == '\n') | ||
565 | sc26xx_console_putchar(port, '\r'); | ||
566 | sc26xx_console_putchar(port, *s++); | ||
567 | } | ||
568 | } | ||
569 | |||
570 | static int __init sc26xx_console_setup(struct console *con, char *options) | ||
571 | { | ||
572 | struct uart_port *port = sc26xx_port; | ||
573 | int baud = 9600; | ||
574 | int bits = 8; | ||
575 | int parity = 'n'; | ||
576 | int flow = 'n'; | ||
577 | |||
578 | if (port->type != PORT_SC26XX) | ||
579 | return -1; | ||
580 | |||
581 | printk(KERN_INFO "Console: ttySC%d (SC26XX)\n", con->index); | ||
582 | if (options) | ||
583 | uart_parse_options(options, &baud, &parity, &bits, &flow); | ||
584 | |||
585 | return uart_set_options(port, con, baud, parity, bits, flow); | ||
586 | } | ||
587 | |||
588 | static struct uart_driver sc26xx_reg; | ||
589 | static struct console sc26xx_console = { | ||
590 | .name = "ttySC", | ||
591 | .write = sc26xx_console_write, | ||
592 | .device = uart_console_device, | ||
593 | .setup = sc26xx_console_setup, | ||
594 | .flags = CON_PRINTBUFFER, | ||
595 | .index = -1, | ||
596 | .data = &sc26xx_reg, | ||
597 | }; | ||
598 | #define SC26XX_CONSOLE &sc26xx_console | ||
599 | #else | ||
600 | #define SC26XX_CONSOLE NULL | ||
601 | #endif | ||
602 | |||
603 | static struct uart_driver sc26xx_reg = { | ||
604 | .owner = THIS_MODULE, | ||
605 | .driver_name = "SC26xx", | ||
606 | .dev_name = "ttySC", | ||
607 | .major = SC26XX_MAJOR, | ||
608 | .minor = SC26XX_MINOR_START, | ||
609 | .nr = SC26XX_NR, | ||
610 | .cons = SC26XX_CONSOLE, | ||
611 | }; | ||
612 | |||
613 | static u8 sc26xx_flags2mask(unsigned int flags, unsigned int bitpos) | ||
614 | { | ||
615 | unsigned int bit = (flags >> bitpos) & 15; | ||
616 | |||
617 | return bit ? (1 << (bit - 1)) : 0; | ||
618 | } | ||
619 | |||
620 | static void __devinit sc26xx_init_masks(struct uart_sc26xx_port *up, | ||
621 | int line, unsigned int data) | ||
622 | { | ||
623 | up->dtr_mask[line] = sc26xx_flags2mask(data, 0); | ||
624 | up->rts_mask[line] = sc26xx_flags2mask(data, 4); | ||
625 | up->dsr_mask[line] = sc26xx_flags2mask(data, 8); | ||
626 | up->cts_mask[line] = sc26xx_flags2mask(data, 12); | ||
627 | up->dcd_mask[line] = sc26xx_flags2mask(data, 16); | ||
628 | up->ri_mask[line] = sc26xx_flags2mask(data, 20); | ||
629 | } | ||
630 | |||
631 | static int __devinit sc26xx_probe(struct platform_device *dev) | ||
632 | { | ||
633 | struct resource *res; | ||
634 | struct uart_sc26xx_port *up; | ||
635 | unsigned int *sc26xx_data = dev->dev.platform_data; | ||
636 | int err; | ||
637 | |||
638 | res = platform_get_resource(dev, IORESOURCE_MEM, 0); | ||
639 | if (!res) | ||
640 | return -ENODEV; | ||
641 | |||
642 | up = kzalloc(sizeof *up, GFP_KERNEL); | ||
643 | if (unlikely(!up)) | ||
644 | return -ENOMEM; | ||
645 | |||
646 | up->port[0].line = 0; | ||
647 | up->port[0].ops = &sc26xx_ops; | ||
648 | up->port[0].type = PORT_SC26XX; | ||
649 | up->port[0].uartclk = (29491200 / 16); /* arbitrary */ | ||
650 | |||
651 | up->port[0].mapbase = res->start; | ||
652 | up->port[0].membase = ioremap_nocache(up->port[0].mapbase, 0x40); | ||
653 | up->port[0].iotype = UPIO_MEM; | ||
654 | up->port[0].irq = platform_get_irq(dev, 0); | ||
655 | |||
656 | up->port[0].dev = &dev->dev; | ||
657 | |||
658 | sc26xx_init_masks(up, 0, sc26xx_data[0]); | ||
659 | |||
660 | sc26xx_port = &up->port[0]; | ||
661 | |||
662 | up->port[1].line = 1; | ||
663 | up->port[1].ops = &sc26xx_ops; | ||
664 | up->port[1].type = PORT_SC26XX; | ||
665 | up->port[1].uartclk = (29491200 / 16); /* arbitrary */ | ||
666 | |||
667 | up->port[1].mapbase = up->port[0].mapbase; | ||
668 | up->port[1].membase = up->port[0].membase; | ||
669 | up->port[1].iotype = UPIO_MEM; | ||
670 | up->port[1].irq = up->port[0].irq; | ||
671 | |||
672 | up->port[1].dev = &dev->dev; | ||
673 | |||
674 | sc26xx_init_masks(up, 1, sc26xx_data[1]); | ||
675 | |||
676 | err = uart_register_driver(&sc26xx_reg); | ||
677 | if (err) | ||
678 | goto out_free_port; | ||
679 | |||
680 | sc26xx_reg.tty_driver->name_base = sc26xx_reg.minor; | ||
681 | |||
682 | err = uart_add_one_port(&sc26xx_reg, &up->port[0]); | ||
683 | if (err) | ||
684 | goto out_unregister_driver; | ||
685 | |||
686 | err = uart_add_one_port(&sc26xx_reg, &up->port[1]); | ||
687 | if (err) | ||
688 | goto out_remove_port0; | ||
689 | |||
690 | err = request_irq(up->port[0].irq, sc26xx_interrupt, 0, "sc26xx", up); | ||
691 | if (err) | ||
692 | goto out_remove_ports; | ||
693 | |||
694 | dev_set_drvdata(&dev->dev, up); | ||
695 | return 0; | ||
696 | |||
697 | out_remove_ports: | ||
698 | uart_remove_one_port(&sc26xx_reg, &up->port[1]); | ||
699 | out_remove_port0: | ||
700 | uart_remove_one_port(&sc26xx_reg, &up->port[0]); | ||
701 | |||
702 | out_unregister_driver: | ||
703 | uart_unregister_driver(&sc26xx_reg); | ||
704 | |||
705 | out_free_port: | ||
706 | kfree(up); | ||
707 | sc26xx_port = NULL; | ||
708 | return err; | ||
709 | } | ||
710 | |||
711 | |||
712 | static int __exit sc26xx_driver_remove(struct platform_device *dev) | ||
713 | { | ||
714 | struct uart_sc26xx_port *up = dev_get_drvdata(&dev->dev); | ||
715 | |||
716 | free_irq(up->port[0].irq, up); | ||
717 | |||
718 | uart_remove_one_port(&sc26xx_reg, &up->port[0]); | ||
719 | uart_remove_one_port(&sc26xx_reg, &up->port[1]); | ||
720 | |||
721 | uart_unregister_driver(&sc26xx_reg); | ||
722 | |||
723 | kfree(up); | ||
724 | sc26xx_port = NULL; | ||
725 | |||
726 | dev_set_drvdata(&dev->dev, NULL); | ||
727 | return 0; | ||
728 | } | ||
729 | |||
730 | static struct platform_driver sc26xx_driver = { | ||
731 | .probe = sc26xx_probe, | ||
732 | .remove = __devexit_p(sc26xx_driver_remove), | ||
733 | .driver = { | ||
734 | .name = "SC26xx", | ||
735 | .owner = THIS_MODULE, | ||
736 | }, | ||
737 | }; | ||
738 | |||
739 | static int __init sc26xx_init(void) | ||
740 | { | ||
741 | return platform_driver_register(&sc26xx_driver); | ||
742 | } | ||
743 | |||
744 | static void __exit sc26xx_exit(void) | ||
745 | { | ||
746 | platform_driver_unregister(&sc26xx_driver); | ||
747 | } | ||
748 | |||
749 | module_init(sc26xx_init); | ||
750 | module_exit(sc26xx_exit); | ||
751 | |||
752 | |||
753 | MODULE_AUTHOR("Thomas Bogendörfer"); | ||
754 | MODULE_DESCRIPTION("SC681/SC2692 serial driver"); | ||
755 | MODULE_VERSION("1.0"); | ||
756 | MODULE_LICENSE("GPL"); | ||
757 | MODULE_ALIAS("platform:SC26xx"); | ||