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49aa49bf GU |
1 | /****************************************************************************/ |
2 | ||
3 | /* | |
4 | * mcf.c -- Freescale ColdFire UART driver | |
5 | * | |
6 | * (C) Copyright 2003-2007, Greg Ungerer <gerg@snapgear.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | /****************************************************************************/ | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/interrupt.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/console.h> | |
21 | #include <linux/tty.h> | |
22 | #include <linux/tty_flip.h> | |
23 | #include <linux/serial.h> | |
24 | #include <linux/serial_core.h> | |
25 | #include <linux/io.h> | |
26 | #include <asm/coldfire.h> | |
27 | #include <asm/mcfsim.h> | |
28 | #include <asm/mcfuart.h> | |
29 | #include <asm/nettel.h> | |
30 | ||
31 | /****************************************************************************/ | |
32 | ||
33 | /* | |
34 | * Some boards implement the DTR/DCD lines using GPIO lines, most | |
35 | * don't. Dummy out the access macros for those that don't. Those | |
36 | * that do should define these macros somewhere in there board | |
37 | * specific inlude files. | |
38 | */ | |
39 | #if !defined(mcf_getppdcd) | |
40 | #define mcf_getppdcd(p) (1) | |
41 | #endif | |
42 | #if !defined(mcf_getppdtr) | |
43 | #define mcf_getppdtr(p) (1) | |
44 | #endif | |
45 | #if !defined(mcf_setppdtr) | |
46 | #define mcf_setppdtr(p, v) do { } while (0) | |
47 | #endif | |
48 | ||
49 | /****************************************************************************/ | |
50 | ||
51 | /* | |
52 | * Local per-uart structure. | |
53 | */ | |
54 | struct mcf_uart { | |
55 | struct uart_port port; | |
56 | unsigned int sigs; /* Local copy of line sigs */ | |
57 | unsigned char imr; /* Local IMR mirror */ | |
58 | }; | |
59 | ||
60 | /****************************************************************************/ | |
61 | ||
62 | static unsigned int mcf_tx_empty(struct uart_port *port) | |
63 | { | |
64 | return (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXEMPTY) ? | |
65 | TIOCSER_TEMT : 0; | |
66 | } | |
67 | ||
68 | /****************************************************************************/ | |
69 | ||
70 | static unsigned int mcf_get_mctrl(struct uart_port *port) | |
71 | { | |
9f69ba86 | 72 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf GU |
73 | unsigned long flags; |
74 | unsigned int sigs; | |
75 | ||
76 | spin_lock_irqsave(&port->lock, flags); | |
77 | sigs = (readb(port->membase + MCFUART_UIPR) & MCFUART_UIPR_CTS) ? | |
78 | 0 : TIOCM_CTS; | |
79 | sigs |= (pp->sigs & TIOCM_RTS); | |
80 | sigs |= (mcf_getppdcd(port->line) ? TIOCM_CD : 0); | |
81 | sigs |= (mcf_getppdtr(port->line) ? TIOCM_DTR : 0); | |
82 | spin_unlock_irqrestore(&port->lock, flags); | |
83 | return sigs; | |
84 | } | |
85 | ||
86 | /****************************************************************************/ | |
87 | ||
88 | static void mcf_set_mctrl(struct uart_port *port, unsigned int sigs) | |
89 | { | |
9f69ba86 | 90 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf GU |
91 | unsigned long flags; |
92 | ||
93 | spin_lock_irqsave(&port->lock, flags); | |
94 | pp->sigs = sigs; | |
95 | mcf_setppdtr(port->line, (sigs & TIOCM_DTR)); | |
96 | if (sigs & TIOCM_RTS) | |
97 | writeb(MCFUART_UOP_RTS, port->membase + MCFUART_UOP1); | |
98 | else | |
99 | writeb(MCFUART_UOP_RTS, port->membase + MCFUART_UOP0); | |
100 | spin_unlock_irqrestore(&port->lock, flags); | |
101 | } | |
102 | ||
103 | /****************************************************************************/ | |
104 | ||
105 | static void mcf_start_tx(struct uart_port *port) | |
106 | { | |
9f69ba86 | 107 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf GU |
108 | unsigned long flags; |
109 | ||
110 | spin_lock_irqsave(&port->lock, flags); | |
111 | pp->imr |= MCFUART_UIR_TXREADY; | |
112 | writeb(pp->imr, port->membase + MCFUART_UIMR); | |
113 | spin_unlock_irqrestore(&port->lock, flags); | |
114 | } | |
115 | ||
116 | /****************************************************************************/ | |
117 | ||
118 | static void mcf_stop_tx(struct uart_port *port) | |
119 | { | |
9f69ba86 | 120 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf GU |
121 | unsigned long flags; |
122 | ||
123 | spin_lock_irqsave(&port->lock, flags); | |
124 | pp->imr &= ~MCFUART_UIR_TXREADY; | |
125 | writeb(pp->imr, port->membase + MCFUART_UIMR); | |
126 | spin_unlock_irqrestore(&port->lock, flags); | |
127 | } | |
128 | ||
129 | /****************************************************************************/ | |
130 | ||
131 | static void mcf_stop_rx(struct uart_port *port) | |
132 | { | |
9f69ba86 | 133 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf GU |
134 | unsigned long flags; |
135 | ||
136 | spin_lock_irqsave(&port->lock, flags); | |
137 | pp->imr &= ~MCFUART_UIR_RXREADY; | |
138 | writeb(pp->imr, port->membase + MCFUART_UIMR); | |
139 | spin_unlock_irqrestore(&port->lock, flags); | |
140 | } | |
141 | ||
142 | /****************************************************************************/ | |
143 | ||
144 | static void mcf_break_ctl(struct uart_port *port, int break_state) | |
145 | { | |
146 | unsigned long flags; | |
147 | ||
148 | spin_lock_irqsave(&port->lock, flags); | |
149 | if (break_state == -1) | |
150 | writeb(MCFUART_UCR_CMDBREAKSTART, port->membase + MCFUART_UCR); | |
151 | else | |
152 | writeb(MCFUART_UCR_CMDBREAKSTOP, port->membase + MCFUART_UCR); | |
153 | spin_unlock_irqrestore(&port->lock, flags); | |
154 | } | |
155 | ||
156 | /****************************************************************************/ | |
157 | ||
158 | static void mcf_enable_ms(struct uart_port *port) | |
159 | { | |
160 | } | |
161 | ||
162 | /****************************************************************************/ | |
163 | ||
164 | static int mcf_startup(struct uart_port *port) | |
165 | { | |
9f69ba86 | 166 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf GU |
167 | unsigned long flags; |
168 | ||
169 | spin_lock_irqsave(&port->lock, flags); | |
170 | ||
171 | /* Reset UART, get it into known state... */ | |
172 | writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR); | |
173 | writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR); | |
174 | ||
175 | /* Enable the UART transmitter and receiver */ | |
176 | writeb(MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE, | |
177 | port->membase + MCFUART_UCR); | |
178 | ||
179 | /* Enable RX interrupts now */ | |
180 | pp->imr = MCFUART_UIR_RXREADY; | |
181 | writeb(pp->imr, port->membase + MCFUART_UIMR); | |
182 | ||
183 | spin_unlock_irqrestore(&port->lock, flags); | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
188 | /****************************************************************************/ | |
189 | ||
190 | static void mcf_shutdown(struct uart_port *port) | |
191 | { | |
9f69ba86 | 192 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf GU |
193 | unsigned long flags; |
194 | ||
195 | spin_lock_irqsave(&port->lock, flags); | |
196 | ||
197 | /* Disable all interrupts now */ | |
198 | pp->imr = 0; | |
199 | writeb(pp->imr, port->membase + MCFUART_UIMR); | |
200 | ||
201 | /* Disable UART transmitter and receiver */ | |
202 | writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR); | |
203 | writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR); | |
204 | ||
205 | spin_unlock_irqrestore(&port->lock, flags); | |
206 | } | |
207 | ||
208 | /****************************************************************************/ | |
209 | ||
210 | static void mcf_set_termios(struct uart_port *port, struct ktermios *termios, | |
211 | struct ktermios *old) | |
212 | { | |
213 | unsigned long flags; | |
214 | unsigned int baud, baudclk; | |
26a4bc66 JA |
215 | #if defined(CONFIG_M5272) |
216 | unsigned int baudfr; | |
217 | #endif | |
49aa49bf GU |
218 | unsigned char mr1, mr2; |
219 | ||
220 | baud = uart_get_baud_rate(port, termios, old, 0, 230400); | |
26a4bc66 JA |
221 | #if defined(CONFIG_M5272) |
222 | baudclk = (MCF_BUSCLK / baud) / 32; | |
223 | baudfr = (((MCF_BUSCLK / baud) + 1) / 2) % 16; | |
224 | #else | |
49aa49bf | 225 | baudclk = ((MCF_BUSCLK / baud) + 16) / 32; |
26a4bc66 | 226 | #endif |
49aa49bf GU |
227 | |
228 | mr1 = MCFUART_MR1_RXIRQRDY | MCFUART_MR1_RXERRCHAR; | |
229 | mr2 = 0; | |
230 | ||
231 | switch (termios->c_cflag & CSIZE) { | |
232 | case CS5: mr1 |= MCFUART_MR1_CS5; break; | |
233 | case CS6: mr1 |= MCFUART_MR1_CS6; break; | |
234 | case CS7: mr1 |= MCFUART_MR1_CS7; break; | |
235 | case CS8: | |
236 | default: mr1 |= MCFUART_MR1_CS8; break; | |
237 | } | |
238 | ||
239 | if (termios->c_cflag & PARENB) { | |
240 | if (termios->c_cflag & CMSPAR) { | |
241 | if (termios->c_cflag & PARODD) | |
242 | mr1 |= MCFUART_MR1_PARITYMARK; | |
243 | else | |
244 | mr1 |= MCFUART_MR1_PARITYSPACE; | |
245 | } else { | |
246 | if (termios->c_cflag & PARODD) | |
247 | mr1 |= MCFUART_MR1_PARITYODD; | |
248 | else | |
249 | mr1 |= MCFUART_MR1_PARITYEVEN; | |
250 | } | |
251 | } else { | |
252 | mr1 |= MCFUART_MR1_PARITYNONE; | |
253 | } | |
254 | ||
255 | if (termios->c_cflag & CSTOPB) | |
256 | mr2 |= MCFUART_MR2_STOP2; | |
257 | else | |
258 | mr2 |= MCFUART_MR2_STOP1; | |
259 | ||
260 | if (termios->c_cflag & CRTSCTS) { | |
261 | mr1 |= MCFUART_MR1_RXRTS; | |
262 | mr2 |= MCFUART_MR2_TXCTS; | |
263 | } | |
264 | ||
265 | spin_lock_irqsave(&port->lock, flags); | |
266 | writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR); | |
267 | writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR); | |
268 | writeb(MCFUART_UCR_CMDRESETMRPTR, port->membase + MCFUART_UCR); | |
269 | writeb(mr1, port->membase + MCFUART_UMR); | |
270 | writeb(mr2, port->membase + MCFUART_UMR); | |
271 | writeb((baudclk & 0xff00) >> 8, port->membase + MCFUART_UBG1); | |
272 | writeb((baudclk & 0xff), port->membase + MCFUART_UBG2); | |
26a4bc66 JA |
273 | #if defined(CONFIG_M5272) |
274 | writeb((baudfr & 0x0f), port->membase + MCFUART_UFPD); | |
275 | #endif | |
49aa49bf GU |
276 | writeb(MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER, |
277 | port->membase + MCFUART_UCSR); | |
278 | writeb(MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE, | |
279 | port->membase + MCFUART_UCR); | |
280 | spin_unlock_irqrestore(&port->lock, flags); | |
281 | } | |
282 | ||
283 | /****************************************************************************/ | |
284 | ||
285 | static void mcf_rx_chars(struct mcf_uart *pp) | |
286 | { | |
9f69ba86 | 287 | struct uart_port *port = &pp->port; |
49aa49bf GU |
288 | unsigned char status, ch, flag; |
289 | ||
290 | while ((status = readb(port->membase + MCFUART_USR)) & MCFUART_USR_RXREADY) { | |
291 | ch = readb(port->membase + MCFUART_URB); | |
292 | flag = TTY_NORMAL; | |
293 | port->icount.rx++; | |
294 | ||
295 | if (status & MCFUART_USR_RXERR) { | |
296 | writeb(MCFUART_UCR_CMDRESETERR, | |
297 | port->membase + MCFUART_UCR); | |
298 | ||
299 | if (status & MCFUART_USR_RXBREAK) { | |
300 | port->icount.brk++; | |
301 | if (uart_handle_break(port)) | |
302 | continue; | |
303 | } else if (status & MCFUART_USR_RXPARITY) { | |
304 | port->icount.parity++; | |
305 | } else if (status & MCFUART_USR_RXOVERRUN) { | |
306 | port->icount.overrun++; | |
307 | } else if (status & MCFUART_USR_RXFRAMING) { | |
308 | port->icount.frame++; | |
309 | } | |
310 | ||
311 | status &= port->read_status_mask; | |
312 | ||
313 | if (status & MCFUART_USR_RXBREAK) | |
314 | flag = TTY_BREAK; | |
315 | else if (status & MCFUART_USR_RXPARITY) | |
316 | flag = TTY_PARITY; | |
317 | else if (status & MCFUART_USR_RXFRAMING) | |
318 | flag = TTY_FRAME; | |
319 | } | |
320 | ||
321 | if (uart_handle_sysrq_char(port, ch)) | |
322 | continue; | |
323 | uart_insert_char(port, status, MCFUART_USR_RXOVERRUN, ch, flag); | |
324 | } | |
325 | ||
a88487c7 | 326 | tty_flip_buffer_push(port->info->port.tty); |
49aa49bf GU |
327 | } |
328 | ||
329 | /****************************************************************************/ | |
330 | ||
331 | static void mcf_tx_chars(struct mcf_uart *pp) | |
332 | { | |
9f69ba86 | 333 | struct uart_port *port = &pp->port; |
49aa49bf GU |
334 | struct circ_buf *xmit = &port->info->xmit; |
335 | ||
336 | if (port->x_char) { | |
337 | /* Send special char - probably flow control */ | |
338 | writeb(port->x_char, port->membase + MCFUART_UTB); | |
339 | port->x_char = 0; | |
340 | port->icount.tx++; | |
341 | return; | |
342 | } | |
343 | ||
344 | while (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY) { | |
345 | if (xmit->head == xmit->tail) | |
346 | break; | |
347 | writeb(xmit->buf[xmit->tail], port->membase + MCFUART_UTB); | |
348 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE -1); | |
349 | port->icount.tx++; | |
350 | } | |
351 | ||
352 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
353 | uart_write_wakeup(port); | |
354 | ||
355 | if (xmit->head == xmit->tail) { | |
356 | pp->imr &= ~MCFUART_UIR_TXREADY; | |
357 | writeb(pp->imr, port->membase + MCFUART_UIMR); | |
358 | } | |
359 | } | |
360 | ||
361 | /****************************************************************************/ | |
362 | ||
363 | static irqreturn_t mcf_interrupt(int irq, void *data) | |
364 | { | |
365 | struct uart_port *port = data; | |
9f69ba86 | 366 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf GU |
367 | unsigned int isr; |
368 | ||
369 | isr = readb(port->membase + MCFUART_UISR) & pp->imr; | |
370 | if (isr & MCFUART_UIR_RXREADY) | |
371 | mcf_rx_chars(pp); | |
372 | if (isr & MCFUART_UIR_TXREADY) | |
373 | mcf_tx_chars(pp); | |
374 | return IRQ_HANDLED; | |
375 | } | |
376 | ||
377 | /****************************************************************************/ | |
378 | ||
379 | static void mcf_config_port(struct uart_port *port, int flags) | |
380 | { | |
381 | port->type = PORT_MCF; | |
382 | ||
383 | /* Clear mask, so no surprise interrupts. */ | |
384 | writeb(0, port->membase + MCFUART_UIMR); | |
385 | ||
386 | if (request_irq(port->irq, mcf_interrupt, IRQF_DISABLED, "UART", port)) | |
387 | printk(KERN_ERR "MCF: unable to attach ColdFire UART %d " | |
388 | "interrupt vector=%d\n", port->line, port->irq); | |
389 | } | |
390 | ||
391 | /****************************************************************************/ | |
392 | ||
393 | static const char *mcf_type(struct uart_port *port) | |
394 | { | |
395 | return (port->type == PORT_MCF) ? "ColdFire UART" : NULL; | |
396 | } | |
397 | ||
398 | /****************************************************************************/ | |
399 | ||
400 | static int mcf_request_port(struct uart_port *port) | |
401 | { | |
402 | /* UARTs always present */ | |
403 | return 0; | |
404 | } | |
405 | ||
406 | /****************************************************************************/ | |
407 | ||
408 | static void mcf_release_port(struct uart_port *port) | |
409 | { | |
410 | /* Nothing to release... */ | |
411 | } | |
412 | ||
413 | /****************************************************************************/ | |
414 | ||
415 | static int mcf_verify_port(struct uart_port *port, struct serial_struct *ser) | |
416 | { | |
417 | if ((ser->type != PORT_UNKNOWN) && (ser->type != PORT_MCF)) | |
418 | return -EINVAL; | |
419 | return 0; | |
420 | } | |
421 | ||
422 | /****************************************************************************/ | |
423 | ||
424 | /* | |
425 | * Define the basic serial functions we support. | |
426 | */ | |
427 | static struct uart_ops mcf_uart_ops = { | |
428 | .tx_empty = mcf_tx_empty, | |
429 | .get_mctrl = mcf_get_mctrl, | |
430 | .set_mctrl = mcf_set_mctrl, | |
431 | .start_tx = mcf_start_tx, | |
432 | .stop_tx = mcf_stop_tx, | |
433 | .stop_rx = mcf_stop_rx, | |
434 | .enable_ms = mcf_enable_ms, | |
435 | .break_ctl = mcf_break_ctl, | |
436 | .startup = mcf_startup, | |
437 | .shutdown = mcf_shutdown, | |
438 | .set_termios = mcf_set_termios, | |
439 | .type = mcf_type, | |
440 | .request_port = mcf_request_port, | |
441 | .release_port = mcf_release_port, | |
442 | .config_port = mcf_config_port, | |
443 | .verify_port = mcf_verify_port, | |
444 | }; | |
445 | ||
446 | static struct mcf_uart mcf_ports[3]; | |
447 | ||
16791963 | 448 | #define MCF_MAXPORTS ARRAY_SIZE(mcf_ports) |
49aa49bf GU |
449 | |
450 | /****************************************************************************/ | |
451 | #if defined(CONFIG_SERIAL_MCF_CONSOLE) | |
452 | /****************************************************************************/ | |
453 | ||
454 | int __init early_mcf_setup(struct mcf_platform_uart *platp) | |
455 | { | |
456 | struct uart_port *port; | |
457 | int i; | |
458 | ||
459 | for (i = 0; ((i < MCF_MAXPORTS) && (platp[i].mapbase)); i++) { | |
460 | port = &mcf_ports[i].port; | |
461 | ||
462 | port->line = i; | |
463 | port->type = PORT_MCF; | |
464 | port->mapbase = platp[i].mapbase; | |
465 | port->membase = (platp[i].membase) ? platp[i].membase : | |
466 | (unsigned char __iomem *) port->mapbase; | |
467 | port->iotype = SERIAL_IO_MEM; | |
468 | port->irq = platp[i].irq; | |
469 | port->uartclk = MCF_BUSCLK; | |
470 | port->flags = ASYNC_BOOT_AUTOCONF; | |
471 | port->ops = &mcf_uart_ops; | |
472 | } | |
473 | ||
474 | return 0; | |
475 | } | |
476 | ||
477 | /****************************************************************************/ | |
478 | ||
479 | static void mcf_console_putc(struct console *co, const char c) | |
480 | { | |
481 | struct uart_port *port = &(mcf_ports + co->index)->port; | |
482 | int i; | |
483 | ||
484 | for (i = 0; (i < 0x10000); i++) { | |
485 | if (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY) | |
486 | break; | |
487 | } | |
488 | writeb(c, port->membase + MCFUART_UTB); | |
489 | for (i = 0; (i < 0x10000); i++) { | |
490 | if (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY) | |
491 | break; | |
492 | } | |
493 | } | |
494 | ||
495 | /****************************************************************************/ | |
496 | ||
497 | static void mcf_console_write(struct console *co, const char *s, unsigned int count) | |
498 | { | |
499 | for (; (count); count--, s++) { | |
500 | mcf_console_putc(co, *s); | |
501 | if (*s == '\n') | |
502 | mcf_console_putc(co, '\r'); | |
503 | } | |
504 | } | |
505 | ||
506 | /****************************************************************************/ | |
507 | ||
508 | static int __init mcf_console_setup(struct console *co, char *options) | |
509 | { | |
510 | struct uart_port *port; | |
511 | int baud = CONFIG_SERIAL_MCF_BAUDRATE; | |
512 | int bits = 8; | |
513 | int parity = 'n'; | |
514 | int flow = 'n'; | |
515 | ||
4330e179 | 516 | if ((co->index < 0) || (co->index >= MCF_MAXPORTS)) |
49aa49bf GU |
517 | co->index = 0; |
518 | port = &mcf_ports[co->index].port; | |
519 | if (port->membase == 0) | |
520 | return -ENODEV; | |
521 | ||
522 | if (options) | |
523 | uart_parse_options(options, &baud, &parity, &bits, &flow); | |
524 | ||
525 | return uart_set_options(port, co, baud, parity, bits, flow); | |
526 | } | |
527 | ||
528 | /****************************************************************************/ | |
529 | ||
530 | static struct uart_driver mcf_driver; | |
531 | ||
532 | static struct console mcf_console = { | |
533 | .name = "ttyS", | |
534 | .write = mcf_console_write, | |
535 | .device = uart_console_device, | |
536 | .setup = mcf_console_setup, | |
537 | .flags = CON_PRINTBUFFER, | |
538 | .index = -1, | |
539 | .data = &mcf_driver, | |
540 | }; | |
541 | ||
542 | static int __init mcf_console_init(void) | |
543 | { | |
544 | register_console(&mcf_console); | |
545 | return 0; | |
546 | } | |
547 | ||
548 | console_initcall(mcf_console_init); | |
549 | ||
550 | #define MCF_CONSOLE &mcf_console | |
551 | ||
552 | /****************************************************************************/ | |
553 | #else | |
554 | /****************************************************************************/ | |
555 | ||
556 | #define MCF_CONSOLE NULL | |
557 | ||
558 | /****************************************************************************/ | |
559 | #endif /* CONFIG_MCF_CONSOLE */ | |
560 | /****************************************************************************/ | |
561 | ||
562 | /* | |
563 | * Define the mcf UART driver structure. | |
564 | */ | |
565 | static struct uart_driver mcf_driver = { | |
566 | .owner = THIS_MODULE, | |
567 | .driver_name = "mcf", | |
568 | .dev_name = "ttyS", | |
569 | .major = TTY_MAJOR, | |
570 | .minor = 64, | |
571 | .nr = MCF_MAXPORTS, | |
572 | .cons = MCF_CONSOLE, | |
573 | }; | |
574 | ||
575 | /****************************************************************************/ | |
576 | ||
577 | static int __devinit mcf_probe(struct platform_device *pdev) | |
578 | { | |
579 | struct mcf_platform_uart *platp = pdev->dev.platform_data; | |
580 | struct uart_port *port; | |
581 | int i; | |
582 | ||
583 | for (i = 0; ((i < MCF_MAXPORTS) && (platp[i].mapbase)); i++) { | |
584 | port = &mcf_ports[i].port; | |
585 | ||
586 | port->line = i; | |
587 | port->type = PORT_MCF; | |
588 | port->mapbase = platp[i].mapbase; | |
589 | port->membase = (platp[i].membase) ? platp[i].membase : | |
590 | (unsigned char __iomem *) platp[i].mapbase; | |
591 | port->iotype = SERIAL_IO_MEM; | |
592 | port->irq = platp[i].irq; | |
593 | port->uartclk = MCF_BUSCLK; | |
594 | port->ops = &mcf_uart_ops; | |
595 | port->flags = ASYNC_BOOT_AUTOCONF; | |
596 | ||
597 | uart_add_one_port(&mcf_driver, port); | |
598 | } | |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
603 | /****************************************************************************/ | |
604 | ||
605 | static int mcf_remove(struct platform_device *pdev) | |
606 | { | |
607 | struct uart_port *port; | |
608 | int i; | |
609 | ||
610 | for (i = 0; (i < MCF_MAXPORTS); i++) { | |
611 | port = &mcf_ports[i].port; | |
612 | if (port) | |
613 | uart_remove_one_port(&mcf_driver, port); | |
614 | } | |
615 | ||
616 | return 0; | |
617 | } | |
618 | ||
619 | /****************************************************************************/ | |
620 | ||
621 | static struct platform_driver mcf_platform_driver = { | |
622 | .probe = mcf_probe, | |
623 | .remove = __devexit_p(mcf_remove), | |
624 | .driver = { | |
625 | .name = "mcfuart", | |
626 | .owner = THIS_MODULE, | |
627 | }, | |
628 | }; | |
629 | ||
630 | /****************************************************************************/ | |
631 | ||
632 | static int __init mcf_init(void) | |
633 | { | |
634 | int rc; | |
635 | ||
636 | printk("ColdFire internal UART serial driver\n"); | |
637 | ||
638 | rc = uart_register_driver(&mcf_driver); | |
639 | if (rc) | |
640 | return rc; | |
641 | rc = platform_driver_register(&mcf_platform_driver); | |
642 | if (rc) | |
643 | return rc; | |
644 | return 0; | |
645 | } | |
646 | ||
647 | /****************************************************************************/ | |
648 | ||
649 | static void __exit mcf_exit(void) | |
650 | { | |
651 | platform_driver_unregister(&mcf_platform_driver); | |
652 | uart_unregister_driver(&mcf_driver); | |
653 | } | |
654 | ||
655 | /****************************************************************************/ | |
656 | ||
657 | module_init(mcf_init); | |
658 | module_exit(mcf_exit); | |
659 | ||
660 | MODULE_AUTHOR("Greg Ungerer <gerg@snapgear.com>"); | |
661 | MODULE_DESCRIPTION("Freescale ColdFire UART driver"); | |
662 | MODULE_LICENSE("GPL"); | |
e169c139 | 663 | MODULE_ALIAS("platform:mcfuart"); |
49aa49bf GU |
664 | |
665 | /****************************************************************************/ |