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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> | |
496c9077 | 26 | #include <linux/uaccess.h> |
574de559 | 27 | #include <linux/platform_device.h> |
49aa49bf GU |
28 | #include <asm/coldfire.h> |
29 | #include <asm/mcfsim.h> | |
30 | #include <asm/mcfuart.h> | |
31 | #include <asm/nettel.h> | |
32 | ||
33 | /****************************************************************************/ | |
34 | ||
35 | /* | |
36 | * Some boards implement the DTR/DCD lines using GPIO lines, most | |
37 | * don't. Dummy out the access macros for those that don't. Those | |
38 | * that do should define these macros somewhere in there board | |
39 | * specific inlude files. | |
40 | */ | |
41 | #if !defined(mcf_getppdcd) | |
42 | #define mcf_getppdcd(p) (1) | |
43 | #endif | |
44 | #if !defined(mcf_getppdtr) | |
45 | #define mcf_getppdtr(p) (1) | |
46 | #endif | |
47 | #if !defined(mcf_setppdtr) | |
48 | #define mcf_setppdtr(p, v) do { } while (0) | |
49 | #endif | |
50 | ||
51 | /****************************************************************************/ | |
52 | ||
53 | /* | |
54 | * Local per-uart structure. | |
55 | */ | |
56 | struct mcf_uart { | |
57 | struct uart_port port; | |
58 | unsigned int sigs; /* Local copy of line sigs */ | |
59 | unsigned char imr; /* Local IMR mirror */ | |
496c9077 | 60 | struct serial_rs485 rs485; /* RS485 settings */ |
49aa49bf GU |
61 | }; |
62 | ||
63 | /****************************************************************************/ | |
64 | ||
65 | static unsigned int mcf_tx_empty(struct uart_port *port) | |
66 | { | |
67 | return (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXEMPTY) ? | |
68 | TIOCSER_TEMT : 0; | |
69 | } | |
70 | ||
71 | /****************************************************************************/ | |
72 | ||
73 | static unsigned int mcf_get_mctrl(struct uart_port *port) | |
74 | { | |
9f69ba86 | 75 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf GU |
76 | unsigned int sigs; |
77 | ||
49aa49bf GU |
78 | sigs = (readb(port->membase + MCFUART_UIPR) & MCFUART_UIPR_CTS) ? |
79 | 0 : TIOCM_CTS; | |
80 | sigs |= (pp->sigs & TIOCM_RTS); | |
81 | sigs |= (mcf_getppdcd(port->line) ? TIOCM_CD : 0); | |
82 | sigs |= (mcf_getppdtr(port->line) ? TIOCM_DTR : 0); | |
0ac8382e | 83 | |
49aa49bf GU |
84 | return sigs; |
85 | } | |
86 | ||
87 | /****************************************************************************/ | |
88 | ||
89 | static void mcf_set_mctrl(struct uart_port *port, unsigned int sigs) | |
90 | { | |
9f69ba86 | 91 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf | 92 | |
49aa49bf GU |
93 | pp->sigs = sigs; |
94 | mcf_setppdtr(port->line, (sigs & TIOCM_DTR)); | |
95 | if (sigs & TIOCM_RTS) | |
96 | writeb(MCFUART_UOP_RTS, port->membase + MCFUART_UOP1); | |
97 | else | |
98 | writeb(MCFUART_UOP_RTS, port->membase + MCFUART_UOP0); | |
49aa49bf GU |
99 | } |
100 | ||
101 | /****************************************************************************/ | |
102 | ||
103 | static void mcf_start_tx(struct uart_port *port) | |
104 | { | |
9f69ba86 | 105 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf | 106 | |
496c9077 QVN |
107 | if (pp->rs485.flags & SER_RS485_ENABLED) { |
108 | /* Enable Transmitter */ | |
109 | writeb(MCFUART_UCR_TXENABLE, port->membase + MCFUART_UCR); | |
110 | /* Manually assert RTS */ | |
111 | writeb(MCFUART_UOP_RTS, port->membase + MCFUART_UOP1); | |
112 | } | |
49aa49bf GU |
113 | pp->imr |= MCFUART_UIR_TXREADY; |
114 | writeb(pp->imr, port->membase + MCFUART_UIMR); | |
49aa49bf GU |
115 | } |
116 | ||
117 | /****************************************************************************/ | |
118 | ||
119 | static void mcf_stop_tx(struct uart_port *port) | |
120 | { | |
9f69ba86 | 121 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf | 122 | |
49aa49bf GU |
123 | pp->imr &= ~MCFUART_UIR_TXREADY; |
124 | writeb(pp->imr, port->membase + MCFUART_UIMR); | |
49aa49bf GU |
125 | } |
126 | ||
127 | /****************************************************************************/ | |
128 | ||
129 | static void mcf_stop_rx(struct uart_port *port) | |
130 | { | |
9f69ba86 | 131 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf | 132 | |
49aa49bf GU |
133 | pp->imr &= ~MCFUART_UIR_RXREADY; |
134 | writeb(pp->imr, port->membase + MCFUART_UIMR); | |
49aa49bf GU |
135 | } |
136 | ||
137 | /****************************************************************************/ | |
138 | ||
139 | static void mcf_break_ctl(struct uart_port *port, int break_state) | |
140 | { | |
141 | unsigned long flags; | |
142 | ||
143 | spin_lock_irqsave(&port->lock, flags); | |
144 | if (break_state == -1) | |
145 | writeb(MCFUART_UCR_CMDBREAKSTART, port->membase + MCFUART_UCR); | |
146 | else | |
147 | writeb(MCFUART_UCR_CMDBREAKSTOP, port->membase + MCFUART_UCR); | |
148 | spin_unlock_irqrestore(&port->lock, flags); | |
149 | } | |
150 | ||
151 | /****************************************************************************/ | |
152 | ||
153 | static void mcf_enable_ms(struct uart_port *port) | |
154 | { | |
155 | } | |
156 | ||
157 | /****************************************************************************/ | |
158 | ||
159 | static int mcf_startup(struct uart_port *port) | |
160 | { | |
9f69ba86 | 161 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf GU |
162 | unsigned long flags; |
163 | ||
164 | spin_lock_irqsave(&port->lock, flags); | |
165 | ||
166 | /* Reset UART, get it into known state... */ | |
167 | writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR); | |
168 | writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR); | |
169 | ||
170 | /* Enable the UART transmitter and receiver */ | |
171 | writeb(MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE, | |
172 | port->membase + MCFUART_UCR); | |
173 | ||
174 | /* Enable RX interrupts now */ | |
175 | pp->imr = MCFUART_UIR_RXREADY; | |
176 | writeb(pp->imr, port->membase + MCFUART_UIMR); | |
177 | ||
178 | spin_unlock_irqrestore(&port->lock, flags); | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
183 | /****************************************************************************/ | |
184 | ||
185 | static void mcf_shutdown(struct uart_port *port) | |
186 | { | |
9f69ba86 | 187 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf GU |
188 | unsigned long flags; |
189 | ||
190 | spin_lock_irqsave(&port->lock, flags); | |
191 | ||
192 | /* Disable all interrupts now */ | |
193 | pp->imr = 0; | |
194 | writeb(pp->imr, port->membase + MCFUART_UIMR); | |
195 | ||
196 | /* Disable UART transmitter and receiver */ | |
197 | writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR); | |
198 | writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR); | |
199 | ||
200 | spin_unlock_irqrestore(&port->lock, flags); | |
201 | } | |
202 | ||
203 | /****************************************************************************/ | |
204 | ||
205 | static void mcf_set_termios(struct uart_port *port, struct ktermios *termios, | |
206 | struct ktermios *old) | |
207 | { | |
496c9077 | 208 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf GU |
209 | unsigned long flags; |
210 | unsigned int baud, baudclk; | |
26a4bc66 JA |
211 | #if defined(CONFIG_M5272) |
212 | unsigned int baudfr; | |
213 | #endif | |
49aa49bf GU |
214 | unsigned char mr1, mr2; |
215 | ||
216 | baud = uart_get_baud_rate(port, termios, old, 0, 230400); | |
26a4bc66 JA |
217 | #if defined(CONFIG_M5272) |
218 | baudclk = (MCF_BUSCLK / baud) / 32; | |
219 | baudfr = (((MCF_BUSCLK / baud) + 1) / 2) % 16; | |
220 | #else | |
49aa49bf | 221 | baudclk = ((MCF_BUSCLK / baud) + 16) / 32; |
26a4bc66 | 222 | #endif |
49aa49bf GU |
223 | |
224 | mr1 = MCFUART_MR1_RXIRQRDY | MCFUART_MR1_RXERRCHAR; | |
225 | mr2 = 0; | |
226 | ||
227 | switch (termios->c_cflag & CSIZE) { | |
228 | case CS5: mr1 |= MCFUART_MR1_CS5; break; | |
229 | case CS6: mr1 |= MCFUART_MR1_CS6; break; | |
230 | case CS7: mr1 |= MCFUART_MR1_CS7; break; | |
231 | case CS8: | |
232 | default: mr1 |= MCFUART_MR1_CS8; break; | |
233 | } | |
234 | ||
235 | if (termios->c_cflag & PARENB) { | |
236 | if (termios->c_cflag & CMSPAR) { | |
237 | if (termios->c_cflag & PARODD) | |
238 | mr1 |= MCFUART_MR1_PARITYMARK; | |
239 | else | |
240 | mr1 |= MCFUART_MR1_PARITYSPACE; | |
241 | } else { | |
242 | if (termios->c_cflag & PARODD) | |
243 | mr1 |= MCFUART_MR1_PARITYODD; | |
244 | else | |
245 | mr1 |= MCFUART_MR1_PARITYEVEN; | |
246 | } | |
247 | } else { | |
248 | mr1 |= MCFUART_MR1_PARITYNONE; | |
249 | } | |
250 | ||
251 | if (termios->c_cflag & CSTOPB) | |
252 | mr2 |= MCFUART_MR2_STOP2; | |
253 | else | |
254 | mr2 |= MCFUART_MR2_STOP1; | |
255 | ||
256 | if (termios->c_cflag & CRTSCTS) { | |
257 | mr1 |= MCFUART_MR1_RXRTS; | |
258 | mr2 |= MCFUART_MR2_TXCTS; | |
259 | } | |
260 | ||
496c9077 QVN |
261 | if (pp->rs485.flags & SER_RS485_ENABLED) { |
262 | dev_dbg(port->dev, "Setting UART to RS485\n"); | |
263 | mr2 |= MCFUART_MR2_TXRTS; | |
264 | } | |
265 | ||
49aa49bf | 266 | spin_lock_irqsave(&port->lock, flags); |
3732b68f | 267 | uart_update_timeout(port, termios->c_cflag, baud); |
49aa49bf GU |
268 | writeb(MCFUART_UCR_CMDRESETRX, port->membase + MCFUART_UCR); |
269 | writeb(MCFUART_UCR_CMDRESETTX, port->membase + MCFUART_UCR); | |
270 | writeb(MCFUART_UCR_CMDRESETMRPTR, port->membase + MCFUART_UCR); | |
271 | writeb(mr1, port->membase + MCFUART_UMR); | |
272 | writeb(mr2, port->membase + MCFUART_UMR); | |
273 | writeb((baudclk & 0xff00) >> 8, port->membase + MCFUART_UBG1); | |
274 | writeb((baudclk & 0xff), port->membase + MCFUART_UBG2); | |
26a4bc66 JA |
275 | #if defined(CONFIG_M5272) |
276 | writeb((baudfr & 0x0f), port->membase + MCFUART_UFPD); | |
277 | #endif | |
49aa49bf GU |
278 | writeb(MCFUART_UCSR_RXCLKTIMER | MCFUART_UCSR_TXCLKTIMER, |
279 | port->membase + MCFUART_UCSR); | |
280 | writeb(MCFUART_UCR_RXENABLE | MCFUART_UCR_TXENABLE, | |
281 | port->membase + MCFUART_UCR); | |
282 | spin_unlock_irqrestore(&port->lock, flags); | |
283 | } | |
284 | ||
285 | /****************************************************************************/ | |
286 | ||
287 | static void mcf_rx_chars(struct mcf_uart *pp) | |
288 | { | |
9f69ba86 | 289 | struct uart_port *port = &pp->port; |
49aa49bf GU |
290 | unsigned char status, ch, flag; |
291 | ||
292 | while ((status = readb(port->membase + MCFUART_USR)) & MCFUART_USR_RXREADY) { | |
293 | ch = readb(port->membase + MCFUART_URB); | |
294 | flag = TTY_NORMAL; | |
295 | port->icount.rx++; | |
296 | ||
297 | if (status & MCFUART_USR_RXERR) { | |
298 | writeb(MCFUART_UCR_CMDRESETERR, | |
299 | port->membase + MCFUART_UCR); | |
300 | ||
301 | if (status & MCFUART_USR_RXBREAK) { | |
302 | port->icount.brk++; | |
303 | if (uart_handle_break(port)) | |
304 | continue; | |
305 | } else if (status & MCFUART_USR_RXPARITY) { | |
306 | port->icount.parity++; | |
307 | } else if (status & MCFUART_USR_RXOVERRUN) { | |
308 | port->icount.overrun++; | |
309 | } else if (status & MCFUART_USR_RXFRAMING) { | |
310 | port->icount.frame++; | |
311 | } | |
312 | ||
313 | status &= port->read_status_mask; | |
314 | ||
315 | if (status & MCFUART_USR_RXBREAK) | |
316 | flag = TTY_BREAK; | |
317 | else if (status & MCFUART_USR_RXPARITY) | |
318 | flag = TTY_PARITY; | |
319 | else if (status & MCFUART_USR_RXFRAMING) | |
320 | flag = TTY_FRAME; | |
321 | } | |
322 | ||
323 | if (uart_handle_sysrq_char(port, ch)) | |
324 | continue; | |
325 | uart_insert_char(port, status, MCFUART_USR_RXOVERRUN, ch, flag); | |
326 | } | |
327 | ||
5275ad70 | 328 | spin_unlock(&port->lock); |
2e124b4a | 329 | tty_flip_buffer_push(&port->state->port); |
5275ad70 | 330 | spin_lock(&port->lock); |
49aa49bf GU |
331 | } |
332 | ||
333 | /****************************************************************************/ | |
334 | ||
335 | static void mcf_tx_chars(struct mcf_uart *pp) | |
336 | { | |
9f69ba86 | 337 | struct uart_port *port = &pp->port; |
ebd2c8f6 | 338 | struct circ_buf *xmit = &port->state->xmit; |
49aa49bf GU |
339 | |
340 | if (port->x_char) { | |
341 | /* Send special char - probably flow control */ | |
342 | writeb(port->x_char, port->membase + MCFUART_UTB); | |
343 | port->x_char = 0; | |
344 | port->icount.tx++; | |
345 | return; | |
346 | } | |
347 | ||
348 | while (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY) { | |
349 | if (xmit->head == xmit->tail) | |
350 | break; | |
351 | writeb(xmit->buf[xmit->tail], port->membase + MCFUART_UTB); | |
352 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE -1); | |
353 | port->icount.tx++; | |
354 | } | |
355 | ||
356 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
357 | uart_write_wakeup(port); | |
358 | ||
359 | if (xmit->head == xmit->tail) { | |
360 | pp->imr &= ~MCFUART_UIR_TXREADY; | |
361 | writeb(pp->imr, port->membase + MCFUART_UIMR); | |
496c9077 QVN |
362 | /* Disable TX to negate RTS automatically */ |
363 | if (pp->rs485.flags & SER_RS485_ENABLED) | |
364 | writeb(MCFUART_UCR_TXDISABLE, | |
365 | port->membase + MCFUART_UCR); | |
49aa49bf GU |
366 | } |
367 | } | |
368 | ||
369 | /****************************************************************************/ | |
370 | ||
371 | static irqreturn_t mcf_interrupt(int irq, void *data) | |
372 | { | |
373 | struct uart_port *port = data; | |
9f69ba86 | 374 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); |
49aa49bf | 375 | unsigned int isr; |
0ac8382e | 376 | irqreturn_t ret = IRQ_NONE; |
49aa49bf GU |
377 | |
378 | isr = readb(port->membase + MCFUART_UISR) & pp->imr; | |
0ac8382e YG |
379 | |
380 | spin_lock(&port->lock); | |
381 | if (isr & MCFUART_UIR_RXREADY) { | |
49aa49bf | 382 | mcf_rx_chars(pp); |
0ac8382e YG |
383 | ret = IRQ_HANDLED; |
384 | } | |
385 | if (isr & MCFUART_UIR_TXREADY) { | |
49aa49bf | 386 | mcf_tx_chars(pp); |
0ac8382e YG |
387 | ret = IRQ_HANDLED; |
388 | } | |
389 | spin_unlock(&port->lock); | |
390 | ||
391 | return ret; | |
49aa49bf GU |
392 | } |
393 | ||
394 | /****************************************************************************/ | |
395 | ||
396 | static void mcf_config_port(struct uart_port *port, int flags) | |
397 | { | |
398 | port->type = PORT_MCF; | |
3732b68f | 399 | port->fifosize = MCFUART_TXFIFOSIZE; |
49aa49bf GU |
400 | |
401 | /* Clear mask, so no surprise interrupts. */ | |
402 | writeb(0, port->membase + MCFUART_UIMR); | |
403 | ||
9cfb5c05 | 404 | if (request_irq(port->irq, mcf_interrupt, 0, "UART", port)) |
49aa49bf GU |
405 | printk(KERN_ERR "MCF: unable to attach ColdFire UART %d " |
406 | "interrupt vector=%d\n", port->line, port->irq); | |
407 | } | |
408 | ||
409 | /****************************************************************************/ | |
410 | ||
411 | static const char *mcf_type(struct uart_port *port) | |
412 | { | |
413 | return (port->type == PORT_MCF) ? "ColdFire UART" : NULL; | |
414 | } | |
415 | ||
416 | /****************************************************************************/ | |
417 | ||
418 | static int mcf_request_port(struct uart_port *port) | |
419 | { | |
420 | /* UARTs always present */ | |
421 | return 0; | |
422 | } | |
423 | ||
424 | /****************************************************************************/ | |
425 | ||
426 | static void mcf_release_port(struct uart_port *port) | |
427 | { | |
428 | /* Nothing to release... */ | |
429 | } | |
430 | ||
431 | /****************************************************************************/ | |
432 | ||
433 | static int mcf_verify_port(struct uart_port *port, struct serial_struct *ser) | |
434 | { | |
435 | if ((ser->type != PORT_UNKNOWN) && (ser->type != PORT_MCF)) | |
436 | return -EINVAL; | |
437 | return 0; | |
438 | } | |
439 | ||
440 | /****************************************************************************/ | |
441 | ||
496c9077 QVN |
442 | /* Enable or disable the RS485 support */ |
443 | static void mcf_config_rs485(struct uart_port *port, struct serial_rs485 *rs485) | |
444 | { | |
445 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); | |
446 | unsigned long flags; | |
447 | unsigned char mr1, mr2; | |
448 | ||
449 | spin_lock_irqsave(&port->lock, flags); | |
450 | /* Get mode registers */ | |
451 | mr1 = readb(port->membase + MCFUART_UMR); | |
452 | mr2 = readb(port->membase + MCFUART_UMR); | |
453 | if (rs485->flags & SER_RS485_ENABLED) { | |
454 | dev_dbg(port->dev, "Setting UART to RS485\n"); | |
455 | /* Automatically negate RTS after TX completes */ | |
456 | mr2 |= MCFUART_MR2_TXRTS; | |
457 | } else { | |
458 | dev_dbg(port->dev, "Setting UART to RS232\n"); | |
459 | mr2 &= ~MCFUART_MR2_TXRTS; | |
460 | } | |
461 | writeb(mr1, port->membase + MCFUART_UMR); | |
462 | writeb(mr2, port->membase + MCFUART_UMR); | |
463 | pp->rs485 = *rs485; | |
464 | spin_unlock_irqrestore(&port->lock, flags); | |
465 | } | |
466 | ||
467 | static int mcf_ioctl(struct uart_port *port, unsigned int cmd, | |
468 | unsigned long arg) | |
469 | { | |
470 | switch (cmd) { | |
471 | case TIOCSRS485: { | |
472 | struct serial_rs485 rs485; | |
473 | if (copy_from_user(&rs485, (struct serial_rs485 *)arg, | |
474 | sizeof(struct serial_rs485))) | |
475 | return -EFAULT; | |
476 | mcf_config_rs485(port, &rs485); | |
477 | break; | |
478 | } | |
479 | case TIOCGRS485: { | |
480 | struct mcf_uart *pp = container_of(port, struct mcf_uart, port); | |
481 | if (copy_to_user((struct serial_rs485 *)arg, &pp->rs485, | |
482 | sizeof(struct serial_rs485))) | |
483 | return -EFAULT; | |
484 | break; | |
485 | } | |
486 | default: | |
487 | return -ENOIOCTLCMD; | |
488 | } | |
489 | return 0; | |
490 | } | |
491 | ||
492 | /****************************************************************************/ | |
493 | ||
49aa49bf GU |
494 | /* |
495 | * Define the basic serial functions we support. | |
496 | */ | |
3732b68f | 497 | static const struct uart_ops mcf_uart_ops = { |
49aa49bf GU |
498 | .tx_empty = mcf_tx_empty, |
499 | .get_mctrl = mcf_get_mctrl, | |
500 | .set_mctrl = mcf_set_mctrl, | |
501 | .start_tx = mcf_start_tx, | |
502 | .stop_tx = mcf_stop_tx, | |
503 | .stop_rx = mcf_stop_rx, | |
504 | .enable_ms = mcf_enable_ms, | |
505 | .break_ctl = mcf_break_ctl, | |
506 | .startup = mcf_startup, | |
507 | .shutdown = mcf_shutdown, | |
508 | .set_termios = mcf_set_termios, | |
509 | .type = mcf_type, | |
510 | .request_port = mcf_request_port, | |
511 | .release_port = mcf_release_port, | |
512 | .config_port = mcf_config_port, | |
513 | .verify_port = mcf_verify_port, | |
496c9077 | 514 | .ioctl = mcf_ioctl, |
49aa49bf GU |
515 | }; |
516 | ||
2545cf6e | 517 | static struct mcf_uart mcf_ports[4]; |
49aa49bf | 518 | |
16791963 | 519 | #define MCF_MAXPORTS ARRAY_SIZE(mcf_ports) |
49aa49bf GU |
520 | |
521 | /****************************************************************************/ | |
522 | #if defined(CONFIG_SERIAL_MCF_CONSOLE) | |
523 | /****************************************************************************/ | |
524 | ||
525 | int __init early_mcf_setup(struct mcf_platform_uart *platp) | |
526 | { | |
527 | struct uart_port *port; | |
528 | int i; | |
529 | ||
530 | for (i = 0; ((i < MCF_MAXPORTS) && (platp[i].mapbase)); i++) { | |
531 | port = &mcf_ports[i].port; | |
532 | ||
533 | port->line = i; | |
534 | port->type = PORT_MCF; | |
535 | port->mapbase = platp[i].mapbase; | |
536 | port->membase = (platp[i].membase) ? platp[i].membase : | |
537 | (unsigned char __iomem *) port->mapbase; | |
538 | port->iotype = SERIAL_IO_MEM; | |
539 | port->irq = platp[i].irq; | |
540 | port->uartclk = MCF_BUSCLK; | |
541 | port->flags = ASYNC_BOOT_AUTOCONF; | |
542 | port->ops = &mcf_uart_ops; | |
543 | } | |
544 | ||
545 | return 0; | |
546 | } | |
547 | ||
548 | /****************************************************************************/ | |
549 | ||
550 | static void mcf_console_putc(struct console *co, const char c) | |
551 | { | |
552 | struct uart_port *port = &(mcf_ports + co->index)->port; | |
553 | int i; | |
554 | ||
555 | for (i = 0; (i < 0x10000); i++) { | |
556 | if (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY) | |
557 | break; | |
558 | } | |
559 | writeb(c, port->membase + MCFUART_UTB); | |
560 | for (i = 0; (i < 0x10000); i++) { | |
561 | if (readb(port->membase + MCFUART_USR) & MCFUART_USR_TXREADY) | |
562 | break; | |
563 | } | |
564 | } | |
565 | ||
566 | /****************************************************************************/ | |
567 | ||
568 | static void mcf_console_write(struct console *co, const char *s, unsigned int count) | |
569 | { | |
570 | for (; (count); count--, s++) { | |
571 | mcf_console_putc(co, *s); | |
572 | if (*s == '\n') | |
573 | mcf_console_putc(co, '\r'); | |
574 | } | |
575 | } | |
576 | ||
577 | /****************************************************************************/ | |
578 | ||
579 | static int __init mcf_console_setup(struct console *co, char *options) | |
580 | { | |
581 | struct uart_port *port; | |
582 | int baud = CONFIG_SERIAL_MCF_BAUDRATE; | |
583 | int bits = 8; | |
584 | int parity = 'n'; | |
585 | int flow = 'n'; | |
586 | ||
4330e179 | 587 | if ((co->index < 0) || (co->index >= MCF_MAXPORTS)) |
49aa49bf GU |
588 | co->index = 0; |
589 | port = &mcf_ports[co->index].port; | |
590 | if (port->membase == 0) | |
591 | return -ENODEV; | |
592 | ||
593 | if (options) | |
594 | uart_parse_options(options, &baud, &parity, &bits, &flow); | |
595 | ||
596 | return uart_set_options(port, co, baud, parity, bits, flow); | |
597 | } | |
598 | ||
599 | /****************************************************************************/ | |
600 | ||
601 | static struct uart_driver mcf_driver; | |
602 | ||
603 | static struct console mcf_console = { | |
604 | .name = "ttyS", | |
605 | .write = mcf_console_write, | |
606 | .device = uart_console_device, | |
607 | .setup = mcf_console_setup, | |
608 | .flags = CON_PRINTBUFFER, | |
609 | .index = -1, | |
610 | .data = &mcf_driver, | |
611 | }; | |
612 | ||
613 | static int __init mcf_console_init(void) | |
614 | { | |
615 | register_console(&mcf_console); | |
616 | return 0; | |
617 | } | |
618 | ||
619 | console_initcall(mcf_console_init); | |
620 | ||
621 | #define MCF_CONSOLE &mcf_console | |
622 | ||
623 | /****************************************************************************/ | |
624 | #else | |
625 | /****************************************************************************/ | |
626 | ||
627 | #define MCF_CONSOLE NULL | |
628 | ||
629 | /****************************************************************************/ | |
630 | #endif /* CONFIG_MCF_CONSOLE */ | |
631 | /****************************************************************************/ | |
632 | ||
633 | /* | |
634 | * Define the mcf UART driver structure. | |
635 | */ | |
636 | static struct uart_driver mcf_driver = { | |
637 | .owner = THIS_MODULE, | |
638 | .driver_name = "mcf", | |
639 | .dev_name = "ttyS", | |
640 | .major = TTY_MAJOR, | |
641 | .minor = 64, | |
642 | .nr = MCF_MAXPORTS, | |
643 | .cons = MCF_CONSOLE, | |
644 | }; | |
645 | ||
646 | /****************************************************************************/ | |
647 | ||
9671f099 | 648 | static int mcf_probe(struct platform_device *pdev) |
49aa49bf | 649 | { |
574de559 | 650 | struct mcf_platform_uart *platp = dev_get_platdata(&pdev->dev); |
49aa49bf GU |
651 | struct uart_port *port; |
652 | int i; | |
653 | ||
654 | for (i = 0; ((i < MCF_MAXPORTS) && (platp[i].mapbase)); i++) { | |
655 | port = &mcf_ports[i].port; | |
656 | ||
657 | port->line = i; | |
658 | port->type = PORT_MCF; | |
659 | port->mapbase = platp[i].mapbase; | |
660 | port->membase = (platp[i].membase) ? platp[i].membase : | |
661 | (unsigned char __iomem *) platp[i].mapbase; | |
662 | port->iotype = SERIAL_IO_MEM; | |
663 | port->irq = platp[i].irq; | |
664 | port->uartclk = MCF_BUSCLK; | |
665 | port->ops = &mcf_uart_ops; | |
666 | port->flags = ASYNC_BOOT_AUTOCONF; | |
667 | ||
668 | uart_add_one_port(&mcf_driver, port); | |
669 | } | |
670 | ||
671 | return 0; | |
672 | } | |
673 | ||
674 | /****************************************************************************/ | |
675 | ||
ae8d8a14 | 676 | static int mcf_remove(struct platform_device *pdev) |
49aa49bf GU |
677 | { |
678 | struct uart_port *port; | |
679 | int i; | |
680 | ||
681 | for (i = 0; (i < MCF_MAXPORTS); i++) { | |
682 | port = &mcf_ports[i].port; | |
683 | if (port) | |
684 | uart_remove_one_port(&mcf_driver, port); | |
685 | } | |
686 | ||
687 | return 0; | |
688 | } | |
689 | ||
690 | /****************************************************************************/ | |
691 | ||
692 | static struct platform_driver mcf_platform_driver = { | |
693 | .probe = mcf_probe, | |
2d47b716 | 694 | .remove = mcf_remove, |
49aa49bf GU |
695 | .driver = { |
696 | .name = "mcfuart", | |
697 | .owner = THIS_MODULE, | |
698 | }, | |
699 | }; | |
700 | ||
701 | /****************************************************************************/ | |
702 | ||
703 | static int __init mcf_init(void) | |
704 | { | |
705 | int rc; | |
706 | ||
707 | printk("ColdFire internal UART serial driver\n"); | |
708 | ||
709 | rc = uart_register_driver(&mcf_driver); | |
710 | if (rc) | |
711 | return rc; | |
712 | rc = platform_driver_register(&mcf_platform_driver); | |
2b359172 WY |
713 | if (rc) { |
714 | uart_unregister_driver(&mcf_driver); | |
49aa49bf | 715 | return rc; |
2b359172 | 716 | } |
49aa49bf GU |
717 | return 0; |
718 | } | |
719 | ||
720 | /****************************************************************************/ | |
721 | ||
722 | static void __exit mcf_exit(void) | |
723 | { | |
724 | platform_driver_unregister(&mcf_platform_driver); | |
725 | uart_unregister_driver(&mcf_driver); | |
726 | } | |
727 | ||
728 | /****************************************************************************/ | |
729 | ||
730 | module_init(mcf_init); | |
731 | module_exit(mcf_exit); | |
732 | ||
733 | MODULE_AUTHOR("Greg Ungerer <gerg@snapgear.com>"); | |
734 | MODULE_DESCRIPTION("Freescale ColdFire UART driver"); | |
735 | MODULE_LICENSE("GPL"); | |
e169c139 | 736 | MODULE_ALIAS("platform:mcfuart"); |
49aa49bf GU |
737 | |
738 | /****************************************************************************/ |