Commit | Line | Data |
---|---|---|
6b7d8f8b TK |
1 | /* |
2 | * altera_uart.c -- Altera UART driver | |
3 | * | |
4 | * Based on mcf.c -- Freescale ColdFire UART driver | |
5 | * | |
6 | * (C) Copyright 2003-2007, Greg Ungerer <gerg@snapgear.com> | |
7 | * (C) Copyright 2008, Thomas Chou <thomas@wytron.com.tw> | |
8 | * (C) Copyright 2010, Tobias Klauser <tklauser@distanz.ch> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | */ | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/init.h> | |
2f8b9c15 | 18 | #include <linux/timer.h> |
6b7d8f8b TK |
19 | #include <linux/interrupt.h> |
20 | #include <linux/module.h> | |
21 | #include <linux/console.h> | |
22 | #include <linux/tty.h> | |
23 | #include <linux/tty_flip.h> | |
24 | #include <linux/serial.h> | |
25 | #include <linux/serial_core.h> | |
26 | #include <linux/platform_device.h> | |
27 | #include <linux/io.h> | |
28 | #include <linux/altera_uart.h> | |
29 | ||
30 | #define DRV_NAME "altera_uart" | |
99793c66 AV |
31 | #define SERIAL_ALTERA_MAJOR 204 |
32 | #define SERIAL_ALTERA_MINOR 213 | |
6b7d8f8b TK |
33 | |
34 | /* | |
35 | * Altera UART register definitions according to the Nios UART datasheet: | |
36 | * http://www.altera.com/literature/ds/ds_nios_uart.pdf | |
37 | */ | |
38 | ||
39 | #define ALTERA_UART_SIZE 32 | |
40 | ||
41 | #define ALTERA_UART_RXDATA_REG 0 | |
42 | #define ALTERA_UART_TXDATA_REG 4 | |
43 | #define ALTERA_UART_STATUS_REG 8 | |
44 | #define ALTERA_UART_CONTROL_REG 12 | |
45 | #define ALTERA_UART_DIVISOR_REG 16 | |
46 | #define ALTERA_UART_EOP_REG 20 | |
47 | ||
48 | #define ALTERA_UART_STATUS_PE_MSK 0x0001 /* parity error */ | |
49 | #define ALTERA_UART_STATUS_FE_MSK 0x0002 /* framing error */ | |
50 | #define ALTERA_UART_STATUS_BRK_MSK 0x0004 /* break */ | |
51 | #define ALTERA_UART_STATUS_ROE_MSK 0x0008 /* RX overrun error */ | |
52 | #define ALTERA_UART_STATUS_TOE_MSK 0x0010 /* TX overrun error */ | |
53 | #define ALTERA_UART_STATUS_TMT_MSK 0x0020 /* TX shift register state */ | |
54 | #define ALTERA_UART_STATUS_TRDY_MSK 0x0040 /* TX ready */ | |
55 | #define ALTERA_UART_STATUS_RRDY_MSK 0x0080 /* RX ready */ | |
56 | #define ALTERA_UART_STATUS_E_MSK 0x0100 /* exception condition */ | |
57 | #define ALTERA_UART_STATUS_DCTS_MSK 0x0400 /* CTS logic-level change */ | |
58 | #define ALTERA_UART_STATUS_CTS_MSK 0x0800 /* CTS logic state */ | |
59 | #define ALTERA_UART_STATUS_EOP_MSK 0x1000 /* EOP written/read */ | |
60 | ||
61 | /* Enable interrupt on... */ | |
62 | #define ALTERA_UART_CONTROL_PE_MSK 0x0001 /* ...parity error */ | |
63 | #define ALTERA_UART_CONTROL_FE_MSK 0x0002 /* ...framing error */ | |
64 | #define ALTERA_UART_CONTROL_BRK_MSK 0x0004 /* ...break */ | |
65 | #define ALTERA_UART_CONTROL_ROE_MSK 0x0008 /* ...RX overrun */ | |
66 | #define ALTERA_UART_CONTROL_TOE_MSK 0x0010 /* ...TX overrun */ | |
67 | #define ALTERA_UART_CONTROL_TMT_MSK 0x0020 /* ...TX shift register empty */ | |
68 | #define ALTERA_UART_CONTROL_TRDY_MSK 0x0040 /* ...TX ready */ | |
69 | #define ALTERA_UART_CONTROL_RRDY_MSK 0x0080 /* ...RX ready */ | |
70 | #define ALTERA_UART_CONTROL_E_MSK 0x0100 /* ...exception*/ | |
71 | ||
72 | #define ALTERA_UART_CONTROL_TRBK_MSK 0x0200 /* TX break */ | |
73 | #define ALTERA_UART_CONTROL_DCTS_MSK 0x0400 /* Interrupt on CTS change */ | |
74 | #define ALTERA_UART_CONTROL_RTS_MSK 0x0800 /* RTS signal */ | |
75 | #define ALTERA_UART_CONTROL_EOP_MSK 0x1000 /* Interrupt on EOP */ | |
76 | ||
77 | /* | |
78 | * Local per-uart structure. | |
79 | */ | |
80 | struct altera_uart { | |
81 | struct uart_port port; | |
2f8b9c15 | 82 | struct timer_list tmr; |
6b7d8f8b TK |
83 | unsigned int sigs; /* Local copy of line sigs */ |
84 | unsigned short imr; /* Local IMR mirror */ | |
85 | }; | |
86 | ||
0d426eda AV |
87 | static u32 altera_uart_readl(struct uart_port *port, int reg) |
88 | { | |
89 | struct altera_uart_platform_uart *platp = port->private_data; | |
90 | ||
91 | return readl(port->membase + (reg << platp->bus_shift)); | |
92 | } | |
93 | ||
94 | static void altera_uart_writel(struct uart_port *port, u32 dat, int reg) | |
95 | { | |
96 | struct altera_uart_platform_uart *platp = port->private_data; | |
97 | ||
98 | writel(dat, port->membase + (reg << platp->bus_shift)); | |
99 | } | |
100 | ||
6b7d8f8b TK |
101 | static unsigned int altera_uart_tx_empty(struct uart_port *port) |
102 | { | |
0d426eda | 103 | return (altera_uart_readl(port, ALTERA_UART_STATUS_REG) & |
6b7d8f8b TK |
104 | ALTERA_UART_STATUS_TMT_MSK) ? TIOCSER_TEMT : 0; |
105 | } | |
106 | ||
107 | static unsigned int altera_uart_get_mctrl(struct uart_port *port) | |
108 | { | |
109 | struct altera_uart *pp = container_of(port, struct altera_uart, port); | |
6b7d8f8b TK |
110 | unsigned int sigs; |
111 | ||
0d426eda | 112 | sigs = (altera_uart_readl(port, ALTERA_UART_STATUS_REG) & |
6b7d8f8b TK |
113 | ALTERA_UART_STATUS_CTS_MSK) ? TIOCM_CTS : 0; |
114 | sigs |= (pp->sigs & TIOCM_RTS); | |
6b7d8f8b TK |
115 | |
116 | return sigs; | |
117 | } | |
118 | ||
119 | static void altera_uart_set_mctrl(struct uart_port *port, unsigned int sigs) | |
120 | { | |
121 | struct altera_uart *pp = container_of(port, struct altera_uart, port); | |
6b7d8f8b | 122 | |
6b7d8f8b TK |
123 | pp->sigs = sigs; |
124 | if (sigs & TIOCM_RTS) | |
125 | pp->imr |= ALTERA_UART_CONTROL_RTS_MSK; | |
126 | else | |
127 | pp->imr &= ~ALTERA_UART_CONTROL_RTS_MSK; | |
0d426eda | 128 | altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG); |
6b7d8f8b TK |
129 | } |
130 | ||
131 | static void altera_uart_start_tx(struct uart_port *port) | |
132 | { | |
133 | struct altera_uart *pp = container_of(port, struct altera_uart, port); | |
6b7d8f8b | 134 | |
6b7d8f8b | 135 | pp->imr |= ALTERA_UART_CONTROL_TRDY_MSK; |
0d426eda | 136 | altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG); |
6b7d8f8b TK |
137 | } |
138 | ||
139 | static void altera_uart_stop_tx(struct uart_port *port) | |
140 | { | |
141 | struct altera_uart *pp = container_of(port, struct altera_uart, port); | |
6b7d8f8b | 142 | |
6b7d8f8b | 143 | pp->imr &= ~ALTERA_UART_CONTROL_TRDY_MSK; |
0d426eda | 144 | altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG); |
6b7d8f8b TK |
145 | } |
146 | ||
147 | static void altera_uart_stop_rx(struct uart_port *port) | |
148 | { | |
149 | struct altera_uart *pp = container_of(port, struct altera_uart, port); | |
6b7d8f8b | 150 | |
6b7d8f8b | 151 | pp->imr &= ~ALTERA_UART_CONTROL_RRDY_MSK; |
0d426eda | 152 | altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG); |
6b7d8f8b TK |
153 | } |
154 | ||
155 | static void altera_uart_break_ctl(struct uart_port *port, int break_state) | |
156 | { | |
157 | struct altera_uart *pp = container_of(port, struct altera_uart, port); | |
158 | unsigned long flags; | |
159 | ||
160 | spin_lock_irqsave(&port->lock, flags); | |
161 | if (break_state == -1) | |
162 | pp->imr |= ALTERA_UART_CONTROL_TRBK_MSK; | |
163 | else | |
164 | pp->imr &= ~ALTERA_UART_CONTROL_TRBK_MSK; | |
0d426eda | 165 | altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG); |
6b7d8f8b TK |
166 | spin_unlock_irqrestore(&port->lock, flags); |
167 | } | |
168 | ||
169 | static void altera_uart_enable_ms(struct uart_port *port) | |
170 | { | |
171 | } | |
172 | ||
173 | static void altera_uart_set_termios(struct uart_port *port, | |
174 | struct ktermios *termios, | |
175 | struct ktermios *old) | |
176 | { | |
177 | unsigned long flags; | |
178 | unsigned int baud, baudclk; | |
179 | ||
180 | baud = uart_get_baud_rate(port, termios, old, 0, 4000000); | |
181 | baudclk = port->uartclk / baud; | |
182 | ||
183 | if (old) | |
184 | tty_termios_copy_hw(termios, old); | |
185 | tty_termios_encode_baud_rate(termios, baud, baud); | |
186 | ||
187 | spin_lock_irqsave(&port->lock, flags); | |
2f8b9c15 | 188 | uart_update_timeout(port, termios->c_cflag, baud); |
0d426eda | 189 | altera_uart_writel(port, baudclk, ALTERA_UART_DIVISOR_REG); |
6b7d8f8b TK |
190 | spin_unlock_irqrestore(&port->lock, flags); |
191 | } | |
192 | ||
193 | static void altera_uart_rx_chars(struct altera_uart *pp) | |
194 | { | |
195 | struct uart_port *port = &pp->port; | |
196 | unsigned char ch, flag; | |
197 | unsigned short status; | |
198 | ||
0d426eda | 199 | while ((status = altera_uart_readl(port, ALTERA_UART_STATUS_REG)) & |
6b7d8f8b | 200 | ALTERA_UART_STATUS_RRDY_MSK) { |
0d426eda | 201 | ch = altera_uart_readl(port, ALTERA_UART_RXDATA_REG); |
6b7d8f8b TK |
202 | flag = TTY_NORMAL; |
203 | port->icount.rx++; | |
204 | ||
205 | if (status & ALTERA_UART_STATUS_E_MSK) { | |
0d426eda AV |
206 | altera_uart_writel(port, status, |
207 | ALTERA_UART_STATUS_REG); | |
6b7d8f8b TK |
208 | |
209 | if (status & ALTERA_UART_STATUS_BRK_MSK) { | |
210 | port->icount.brk++; | |
211 | if (uart_handle_break(port)) | |
212 | continue; | |
213 | } else if (status & ALTERA_UART_STATUS_PE_MSK) { | |
214 | port->icount.parity++; | |
215 | } else if (status & ALTERA_UART_STATUS_ROE_MSK) { | |
216 | port->icount.overrun++; | |
217 | } else if (status & ALTERA_UART_STATUS_FE_MSK) { | |
218 | port->icount.frame++; | |
219 | } | |
220 | ||
221 | status &= port->read_status_mask; | |
222 | ||
223 | if (status & ALTERA_UART_STATUS_BRK_MSK) | |
224 | flag = TTY_BREAK; | |
225 | else if (status & ALTERA_UART_STATUS_PE_MSK) | |
226 | flag = TTY_PARITY; | |
227 | else if (status & ALTERA_UART_STATUS_FE_MSK) | |
228 | flag = TTY_FRAME; | |
229 | } | |
230 | ||
231 | if (uart_handle_sysrq_char(port, ch)) | |
232 | continue; | |
233 | uart_insert_char(port, status, ALTERA_UART_STATUS_ROE_MSK, ch, | |
234 | flag); | |
235 | } | |
236 | ||
237 | tty_flip_buffer_push(port->state->port.tty); | |
238 | } | |
239 | ||
240 | static void altera_uart_tx_chars(struct altera_uart *pp) | |
241 | { | |
242 | struct uart_port *port = &pp->port; | |
243 | struct circ_buf *xmit = &port->state->xmit; | |
244 | ||
245 | if (port->x_char) { | |
246 | /* Send special char - probably flow control */ | |
0d426eda | 247 | altera_uart_writel(port, port->x_char, ALTERA_UART_TXDATA_REG); |
6b7d8f8b TK |
248 | port->x_char = 0; |
249 | port->icount.tx++; | |
250 | return; | |
251 | } | |
252 | ||
0d426eda | 253 | while (altera_uart_readl(port, ALTERA_UART_STATUS_REG) & |
6b7d8f8b TK |
254 | ALTERA_UART_STATUS_TRDY_MSK) { |
255 | if (xmit->head == xmit->tail) | |
256 | break; | |
0d426eda AV |
257 | altera_uart_writel(port, xmit->buf[xmit->tail], |
258 | ALTERA_UART_TXDATA_REG); | |
6b7d8f8b TK |
259 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); |
260 | port->icount.tx++; | |
261 | } | |
262 | ||
263 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
264 | uart_write_wakeup(port); | |
265 | ||
266 | if (xmit->head == xmit->tail) { | |
267 | pp->imr &= ~ALTERA_UART_CONTROL_TRDY_MSK; | |
0d426eda | 268 | altera_uart_writel(port, pp->imr, ALTERA_UART_CONTROL_REG); |
6b7d8f8b TK |
269 | } |
270 | } | |
271 | ||
272 | static irqreturn_t altera_uart_interrupt(int irq, void *data) | |
273 | { | |
274 | struct uart_port *port = data; | |
275 | struct altera_uart *pp = container_of(port, struct altera_uart, port); | |
276 | unsigned int isr; | |
277 | ||
0d426eda | 278 | isr = altera_uart_readl(port, ALTERA_UART_STATUS_REG) & pp->imr; |
d8d721f4 TK |
279 | |
280 | spin_lock(&port->lock); | |
6b7d8f8b TK |
281 | if (isr & ALTERA_UART_STATUS_RRDY_MSK) |
282 | altera_uart_rx_chars(pp); | |
283 | if (isr & ALTERA_UART_STATUS_TRDY_MSK) | |
284 | altera_uart_tx_chars(pp); | |
d8d721f4 TK |
285 | spin_unlock(&port->lock); |
286 | ||
6b7d8f8b TK |
287 | return IRQ_RETVAL(isr); |
288 | } | |
289 | ||
2f8b9c15 AV |
290 | static void altera_uart_timer(unsigned long data) |
291 | { | |
292 | struct uart_port *port = (void *)data; | |
293 | struct altera_uart *pp = container_of(port, struct altera_uart, port); | |
294 | ||
295 | altera_uart_interrupt(0, port); | |
296 | mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port)); | |
297 | } | |
298 | ||
6b7d8f8b TK |
299 | static void altera_uart_config_port(struct uart_port *port, int flags) |
300 | { | |
301 | port->type = PORT_ALTERA_UART; | |
302 | ||
303 | /* Clear mask, so no surprise interrupts. */ | |
0d426eda | 304 | altera_uart_writel(port, 0, ALTERA_UART_CONTROL_REG); |
6b7d8f8b | 305 | /* Clear status register */ |
0d426eda | 306 | altera_uart_writel(port, 0, ALTERA_UART_STATUS_REG); |
6b7d8f8b TK |
307 | } |
308 | ||
309 | static int altera_uart_startup(struct uart_port *port) | |
310 | { | |
311 | struct altera_uart *pp = container_of(port, struct altera_uart, port); | |
312 | unsigned long flags; | |
313 | int ret; | |
314 | ||
2f8b9c15 AV |
315 | if (!port->irq) { |
316 | setup_timer(&pp->tmr, altera_uart_timer, (unsigned long)port); | |
317 | mod_timer(&pp->tmr, jiffies + uart_poll_timeout(port)); | |
318 | return 0; | |
319 | } | |
320 | ||
6b7d8f8b TK |
321 | ret = request_irq(port->irq, altera_uart_interrupt, IRQF_DISABLED, |
322 | DRV_NAME, port); | |
323 | if (ret) { | |
324 | pr_err(DRV_NAME ": unable to attach Altera UART %d " | |
325 | "interrupt vector=%d\n", port->line, port->irq); | |
326 | return ret; | |
327 | } | |
328 | ||
329 | spin_lock_irqsave(&port->lock, flags); | |
330 | ||
331 | /* Enable RX interrupts now */ | |
332 | pp->imr = ALTERA_UART_CONTROL_RRDY_MSK; | |
333 | writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG); | |
334 | ||
335 | spin_unlock_irqrestore(&port->lock, flags); | |
336 | ||
337 | return 0; | |
338 | } | |
339 | ||
340 | static void altera_uart_shutdown(struct uart_port *port) | |
341 | { | |
342 | struct altera_uart *pp = container_of(port, struct altera_uart, port); | |
343 | unsigned long flags; | |
344 | ||
345 | spin_lock_irqsave(&port->lock, flags); | |
346 | ||
347 | /* Disable all interrupts now */ | |
348 | pp->imr = 0; | |
349 | writel(pp->imr, port->membase + ALTERA_UART_CONTROL_REG); | |
350 | ||
351 | spin_unlock_irqrestore(&port->lock, flags); | |
352 | ||
2f8b9c15 AV |
353 | if (port->irq) |
354 | free_irq(port->irq, port); | |
355 | else | |
356 | del_timer_sync(&pp->tmr); | |
6b7d8f8b TK |
357 | } |
358 | ||
359 | static const char *altera_uart_type(struct uart_port *port) | |
360 | { | |
361 | return (port->type == PORT_ALTERA_UART) ? "Altera UART" : NULL; | |
362 | } | |
363 | ||
364 | static int altera_uart_request_port(struct uart_port *port) | |
365 | { | |
366 | /* UARTs always present */ | |
367 | return 0; | |
368 | } | |
369 | ||
370 | static void altera_uart_release_port(struct uart_port *port) | |
371 | { | |
372 | /* Nothing to release... */ | |
373 | } | |
374 | ||
375 | static int altera_uart_verify_port(struct uart_port *port, | |
376 | struct serial_struct *ser) | |
377 | { | |
378 | if ((ser->type != PORT_UNKNOWN) && (ser->type != PORT_ALTERA_UART)) | |
379 | return -EINVAL; | |
380 | return 0; | |
381 | } | |
382 | ||
383 | /* | |
384 | * Define the basic serial functions we support. | |
385 | */ | |
386 | static struct uart_ops altera_uart_ops = { | |
387 | .tx_empty = altera_uart_tx_empty, | |
388 | .get_mctrl = altera_uart_get_mctrl, | |
389 | .set_mctrl = altera_uart_set_mctrl, | |
390 | .start_tx = altera_uart_start_tx, | |
391 | .stop_tx = altera_uart_stop_tx, | |
392 | .stop_rx = altera_uart_stop_rx, | |
393 | .enable_ms = altera_uart_enable_ms, | |
394 | .break_ctl = altera_uart_break_ctl, | |
395 | .startup = altera_uart_startup, | |
396 | .shutdown = altera_uart_shutdown, | |
397 | .set_termios = altera_uart_set_termios, | |
398 | .type = altera_uart_type, | |
399 | .request_port = altera_uart_request_port, | |
400 | .release_port = altera_uart_release_port, | |
401 | .config_port = altera_uart_config_port, | |
402 | .verify_port = altera_uart_verify_port, | |
403 | }; | |
404 | ||
405 | static struct altera_uart altera_uart_ports[CONFIG_SERIAL_ALTERA_UART_MAXPORTS]; | |
406 | ||
407 | #if defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE) | |
408 | ||
409 | int __init early_altera_uart_setup(struct altera_uart_platform_uart *platp) | |
410 | { | |
411 | struct uart_port *port; | |
412 | int i; | |
413 | ||
414 | for (i = 0; i < CONFIG_SERIAL_ALTERA_UART_MAXPORTS && platp[i].mapbase; i++) { | |
415 | port = &altera_uart_ports[i].port; | |
416 | ||
417 | port->line = i; | |
418 | port->type = PORT_ALTERA_UART; | |
419 | port->mapbase = platp[i].mapbase; | |
420 | port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE); | |
421 | port->iotype = SERIAL_IO_MEM; | |
422 | port->irq = platp[i].irq; | |
423 | port->uartclk = platp[i].uartclk; | |
288e9feb | 424 | port->flags = UPF_BOOT_AUTOCONF; |
6b7d8f8b | 425 | port->ops = &altera_uart_ops; |
0d426eda | 426 | port->private_data = platp; |
6b7d8f8b TK |
427 | } |
428 | ||
429 | return 0; | |
430 | } | |
431 | ||
fadf34f0 | 432 | static void altera_uart_console_putc(struct uart_port *port, const char c) |
6b7d8f8b | 433 | { |
0d426eda | 434 | while (!(altera_uart_readl(port, ALTERA_UART_STATUS_REG) & |
e8dd4757 | 435 | ALTERA_UART_STATUS_TRDY_MSK)) |
fadf34f0 | 436 | cpu_relax(); |
6b7d8f8b | 437 | |
6b7d8f8b | 438 | writel(c, port->membase + ALTERA_UART_TXDATA_REG); |
6b7d8f8b TK |
439 | } |
440 | ||
441 | static void altera_uart_console_write(struct console *co, const char *s, | |
442 | unsigned int count) | |
443 | { | |
fadf34f0 TK |
444 | struct uart_port *port = &(altera_uart_ports + co->index)->port; |
445 | ||
6b7d8f8b | 446 | for (; count; count--, s++) { |
fadf34f0 | 447 | altera_uart_console_putc(port, *s); |
6b7d8f8b | 448 | if (*s == '\n') |
fadf34f0 | 449 | altera_uart_console_putc(port, '\r'); |
6b7d8f8b TK |
450 | } |
451 | } | |
452 | ||
453 | static int __init altera_uart_console_setup(struct console *co, char *options) | |
454 | { | |
455 | struct uart_port *port; | |
456 | int baud = CONFIG_SERIAL_ALTERA_UART_BAUDRATE; | |
457 | int bits = 8; | |
458 | int parity = 'n'; | |
459 | int flow = 'n'; | |
460 | ||
461 | if (co->index < 0 || co->index >= CONFIG_SERIAL_ALTERA_UART_MAXPORTS) | |
462 | return -EINVAL; | |
463 | port = &altera_uart_ports[co->index].port; | |
70eebd0b | 464 | if (!port->membase) |
6b7d8f8b TK |
465 | return -ENODEV; |
466 | ||
467 | if (options) | |
468 | uart_parse_options(options, &baud, &parity, &bits, &flow); | |
469 | ||
470 | return uart_set_options(port, co, baud, parity, bits, flow); | |
471 | } | |
472 | ||
473 | static struct uart_driver altera_uart_driver; | |
474 | ||
475 | static struct console altera_uart_console = { | |
99793c66 | 476 | .name = "ttyAL", |
6b7d8f8b TK |
477 | .write = altera_uart_console_write, |
478 | .device = uart_console_device, | |
479 | .setup = altera_uart_console_setup, | |
480 | .flags = CON_PRINTBUFFER, | |
481 | .index = -1, | |
482 | .data = &altera_uart_driver, | |
483 | }; | |
484 | ||
485 | static int __init altera_uart_console_init(void) | |
486 | { | |
487 | register_console(&altera_uart_console); | |
488 | return 0; | |
489 | } | |
490 | ||
491 | console_initcall(altera_uart_console_init); | |
492 | ||
493 | #define ALTERA_UART_CONSOLE (&altera_uart_console) | |
494 | ||
495 | #else | |
496 | ||
497 | #define ALTERA_UART_CONSOLE NULL | |
498 | ||
499 | #endif /* CONFIG_ALTERA_UART_CONSOLE */ | |
500 | ||
501 | /* | |
502 | * Define the altera_uart UART driver structure. | |
503 | */ | |
504 | static struct uart_driver altera_uart_driver = { | |
505 | .owner = THIS_MODULE, | |
506 | .driver_name = DRV_NAME, | |
99793c66 AV |
507 | .dev_name = "ttyAL", |
508 | .major = SERIAL_ALTERA_MAJOR, | |
509 | .minor = SERIAL_ALTERA_MINOR, | |
6b7d8f8b TK |
510 | .nr = CONFIG_SERIAL_ALTERA_UART_MAXPORTS, |
511 | .cons = ALTERA_UART_CONSOLE, | |
512 | }; | |
513 | ||
514 | static int __devinit altera_uart_probe(struct platform_device *pdev) | |
515 | { | |
516 | struct altera_uart_platform_uart *platp = pdev->dev.platform_data; | |
517 | struct uart_port *port; | |
6b5756f1 AV |
518 | struct resource *res_mem; |
519 | struct resource *res_irq; | |
520 | int i = pdev->id; | |
6b7d8f8b | 521 | |
6b5756f1 AV |
522 | /* -1 emphasizes that the platform must have one port, no .N suffix */ |
523 | if (i == -1) | |
524 | i = 0; | |
6b7d8f8b | 525 | |
6b5756f1 AV |
526 | if (i >= CONFIG_SERIAL_ALTERA_UART_MAXPORTS) |
527 | return -EINVAL; | |
6b7d8f8b | 528 | |
6b5756f1 AV |
529 | port = &altera_uart_ports[i].port; |
530 | ||
531 | res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
532 | if (res_mem) | |
533 | port->mapbase = res_mem->start; | |
534 | else if (platp->mapbase) | |
535 | port->mapbase = platp->mapbase; | |
536 | else | |
537 | return -EINVAL; | |
538 | ||
539 | res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); | |
540 | if (res_irq) | |
541 | port->irq = res_irq->start; | |
542 | else if (platp->irq) | |
543 | port->irq = platp->irq; | |
544 | ||
545 | port->membase = ioremap(port->mapbase, ALTERA_UART_SIZE); | |
546 | if (!port->membase) | |
547 | return -ENOMEM; | |
548 | ||
549 | port->line = i; | |
550 | port->type = PORT_ALTERA_UART; | |
551 | port->iotype = SERIAL_IO_MEM; | |
552 | port->uartclk = platp->uartclk; | |
553 | port->ops = &altera_uart_ops; | |
288e9feb | 554 | port->flags = UPF_BOOT_AUTOCONF; |
0d426eda | 555 | port->private_data = platp; |
6b5756f1 AV |
556 | |
557 | uart_add_one_port(&altera_uart_driver, port); | |
6b7d8f8b TK |
558 | |
559 | return 0; | |
560 | } | |
561 | ||
c1bfffa9 | 562 | static int __devexit altera_uart_remove(struct platform_device *pdev) |
6b7d8f8b | 563 | { |
6b5756f1 | 564 | struct uart_port *port = &altera_uart_ports[pdev->id].port; |
6b7d8f8b | 565 | |
6b5756f1 | 566 | uart_remove_one_port(&altera_uart_driver, port); |
6b7d8f8b TK |
567 | return 0; |
568 | } | |
569 | ||
570 | static struct platform_driver altera_uart_platform_driver = { | |
571 | .probe = altera_uart_probe, | |
572 | .remove = __devexit_p(altera_uart_remove), | |
573 | .driver = { | |
574 | .name = DRV_NAME, | |
575 | .owner = THIS_MODULE, | |
576 | .pm = NULL, | |
577 | }, | |
578 | }; | |
579 | ||
580 | static int __init altera_uart_init(void) | |
581 | { | |
582 | int rc; | |
583 | ||
584 | rc = uart_register_driver(&altera_uart_driver); | |
585 | if (rc) | |
586 | return rc; | |
587 | rc = platform_driver_register(&altera_uart_platform_driver); | |
588 | if (rc) { | |
589 | uart_unregister_driver(&altera_uart_driver); | |
590 | return rc; | |
591 | } | |
592 | return 0; | |
593 | } | |
594 | ||
595 | static void __exit altera_uart_exit(void) | |
596 | { | |
597 | platform_driver_unregister(&altera_uart_platform_driver); | |
598 | uart_unregister_driver(&altera_uart_driver); | |
599 | } | |
600 | ||
601 | module_init(altera_uart_init); | |
602 | module_exit(altera_uart_exit); | |
603 | ||
604 | MODULE_DESCRIPTION("Altera UART driver"); | |
605 | MODULE_AUTHOR("Thomas Chou <thomas@wytron.com.tw>"); | |
606 | MODULE_LICENSE("GPL"); | |
607 | MODULE_ALIAS("platform:" DRV_NAME); | |
99793c66 | 608 | MODULE_ALIAS_CHARDEV_MAJOR(SERIAL_ALTERA_MAJOR); |