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f8441e13 SH |
1 | /* |
2 | * drivers/serial/netx-serial.c | |
3 | * | |
4 | * Copyright (c) 2005 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | ||
f8441e13 SH |
20 | #if defined(CONFIG_SERIAL_NETX_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) |
21 | #define SUPPORT_SYSRQ | |
22 | #endif | |
23 | ||
24 | #include <linux/device.h> | |
25 | #include <linux/module.h> | |
26 | #include <linux/ioport.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/console.h> | |
29 | #include <linux/sysrq.h> | |
30 | #include <linux/platform_device.h> | |
31 | #include <linux/tty.h> | |
32 | #include <linux/tty_flip.h> | |
33 | #include <linux/serial_core.h> | |
34 | #include <linux/serial.h> | |
35 | ||
36 | #include <asm/io.h> | |
37 | #include <asm/irq.h> | |
a09e64fb RK |
38 | #include <mach/hardware.h> |
39 | #include <mach/netx-regs.h> | |
f8441e13 SH |
40 | |
41 | /* We've been assigned a range on the "Low-density serial ports" major */ | |
42 | #define SERIAL_NX_MAJOR 204 | |
43 | #define MINOR_START 170 | |
44 | ||
f8441e13 SH |
45 | enum uart_regs { |
46 | UART_DR = 0x00, | |
47 | UART_SR = 0x04, | |
48 | UART_LINE_CR = 0x08, | |
49 | UART_BAUDDIV_MSB = 0x0c, | |
50 | UART_BAUDDIV_LSB = 0x10, | |
51 | UART_CR = 0x14, | |
52 | UART_FR = 0x18, | |
53 | UART_IIR = 0x1c, | |
54 | UART_ILPR = 0x20, | |
55 | UART_RTS_CR = 0x24, | |
56 | UART_RTS_LEAD = 0x28, | |
57 | UART_RTS_TRAIL = 0x2c, | |
58 | UART_DRV_ENABLE = 0x30, | |
59 | UART_BRM_CR = 0x34, | |
60 | UART_RXFIFO_IRQLEVEL = 0x38, | |
61 | UART_TXFIFO_IRQLEVEL = 0x3c, | |
62 | }; | |
63 | ||
64 | #define SR_FE (1<<0) | |
65 | #define SR_PE (1<<1) | |
66 | #define SR_BE (1<<2) | |
67 | #define SR_OE (1<<3) | |
68 | ||
69 | #define LINE_CR_BRK (1<<0) | |
70 | #define LINE_CR_PEN (1<<1) | |
71 | #define LINE_CR_EPS (1<<2) | |
72 | #define LINE_CR_STP2 (1<<3) | |
73 | #define LINE_CR_FEN (1<<4) | |
74 | #define LINE_CR_5BIT (0<<5) | |
75 | #define LINE_CR_6BIT (1<<5) | |
76 | #define LINE_CR_7BIT (2<<5) | |
77 | #define LINE_CR_8BIT (3<<5) | |
78 | #define LINE_CR_BITS_MASK (3<<5) | |
79 | ||
80 | #define CR_UART_EN (1<<0) | |
81 | #define CR_SIREN (1<<1) | |
82 | #define CR_SIRLP (1<<2) | |
83 | #define CR_MSIE (1<<3) | |
84 | #define CR_RIE (1<<4) | |
85 | #define CR_TIE (1<<5) | |
86 | #define CR_RTIE (1<<6) | |
87 | #define CR_LBE (1<<7) | |
88 | ||
89 | #define FR_CTS (1<<0) | |
90 | #define FR_DSR (1<<1) | |
91 | #define FR_DCD (1<<2) | |
92 | #define FR_BUSY (1<<3) | |
93 | #define FR_RXFE (1<<4) | |
94 | #define FR_TXFF (1<<5) | |
95 | #define FR_RXFF (1<<6) | |
96 | #define FR_TXFE (1<<7) | |
97 | ||
98 | #define IIR_MIS (1<<0) | |
99 | #define IIR_RIS (1<<1) | |
100 | #define IIR_TIS (1<<2) | |
101 | #define IIR_RTIS (1<<3) | |
102 | #define IIR_MASK 0xf | |
103 | ||
104 | #define RTS_CR_AUTO (1<<0) | |
105 | #define RTS_CR_RTS (1<<1) | |
106 | #define RTS_CR_COUNT (1<<2) | |
107 | #define RTS_CR_MOD2 (1<<3) | |
108 | #define RTS_CR_RTS_POL (1<<4) | |
109 | #define RTS_CR_CTS_CTR (1<<5) | |
110 | #define RTS_CR_CTS_POL (1<<6) | |
111 | #define RTS_CR_STICK (1<<7) | |
112 | ||
113 | #define UART_PORT_SIZE 0x40 | |
114 | #define DRIVER_NAME "netx-uart" | |
115 | ||
116 | struct netx_port { | |
117 | struct uart_port port; | |
118 | }; | |
119 | ||
120 | static void netx_stop_tx(struct uart_port *port) | |
121 | { | |
122 | unsigned int val; | |
123 | val = readl(port->membase + UART_CR); | |
124 | writel(val & ~CR_TIE, port->membase + UART_CR); | |
125 | } | |
126 | ||
127 | static void netx_stop_rx(struct uart_port *port) | |
128 | { | |
129 | unsigned int val; | |
130 | val = readl(port->membase + UART_CR); | |
131 | writel(val & ~CR_RIE, port->membase + UART_CR); | |
132 | } | |
133 | ||
134 | static void netx_enable_ms(struct uart_port *port) | |
135 | { | |
136 | unsigned int val; | |
137 | val = readl(port->membase + UART_CR); | |
138 | writel(val | CR_MSIE, port->membase + UART_CR); | |
139 | } | |
140 | ||
141 | static inline void netx_transmit_buffer(struct uart_port *port) | |
142 | { | |
ebd2c8f6 | 143 | struct circ_buf *xmit = &port->state->xmit; |
f8441e13 SH |
144 | |
145 | if (port->x_char) { | |
146 | writel(port->x_char, port->membase + UART_DR); | |
147 | port->icount.tx++; | |
148 | port->x_char = 0; | |
149 | return; | |
150 | } | |
151 | ||
152 | if (uart_tx_stopped(port) || uart_circ_empty(xmit)) { | |
153 | netx_stop_tx(port); | |
154 | return; | |
155 | } | |
156 | ||
157 | do { | |
158 | /* send xmit->buf[xmit->tail] | |
159 | * out the port here */ | |
160 | writel(xmit->buf[xmit->tail], port->membase + UART_DR); | |
161 | xmit->tail = (xmit->tail + 1) & | |
162 | (UART_XMIT_SIZE - 1); | |
163 | port->icount.tx++; | |
164 | if (uart_circ_empty(xmit)) | |
165 | break; | |
166 | } while (!(readl(port->membase + UART_FR) & FR_TXFF)); | |
167 | ||
168 | if (uart_circ_empty(xmit)) | |
169 | netx_stop_tx(port); | |
170 | } | |
171 | ||
172 | static void netx_start_tx(struct uart_port *port) | |
173 | { | |
174 | writel( | |
175 | readl(port->membase + UART_CR) | CR_TIE, port->membase + UART_CR); | |
176 | ||
177 | if (!(readl(port->membase + UART_FR) & FR_TXFF)) | |
178 | netx_transmit_buffer(port); | |
179 | } | |
180 | ||
181 | static unsigned int netx_tx_empty(struct uart_port *port) | |
182 | { | |
183 | return readl(port->membase + UART_FR) & FR_BUSY ? 0 : TIOCSER_TEMT; | |
184 | } | |
185 | ||
186 | static void netx_txint(struct uart_port *port) | |
187 | { | |
ebd2c8f6 | 188 | struct circ_buf *xmit = &port->state->xmit; |
f8441e13 SH |
189 | |
190 | if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { | |
191 | netx_stop_tx(port); | |
192 | return; | |
193 | } | |
194 | ||
195 | netx_transmit_buffer(port); | |
196 | ||
197 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
198 | uart_write_wakeup(port); | |
199 | } | |
200 | ||
7d12e780 | 201 | static void netx_rxint(struct uart_port *port) |
f8441e13 SH |
202 | { |
203 | unsigned char rx, flg, status; | |
ebd2c8f6 | 204 | struct tty_struct *tty = port->state->port.tty; |
f8441e13 SH |
205 | |
206 | while (!(readl(port->membase + UART_FR) & FR_RXFE)) { | |
207 | rx = readl(port->membase + UART_DR); | |
208 | flg = TTY_NORMAL; | |
209 | port->icount.rx++; | |
210 | status = readl(port->membase + UART_SR); | |
211 | if (status & SR_BE) { | |
212 | writel(0, port->membase + UART_SR); | |
213 | if (uart_handle_break(port)) | |
214 | continue; | |
215 | } | |
216 | ||
217 | if (unlikely(status & (SR_FE | SR_PE | SR_OE))) { | |
218 | ||
219 | if (status & SR_PE) | |
220 | port->icount.parity++; | |
221 | else if (status & SR_FE) | |
222 | port->icount.frame++; | |
223 | if (status & SR_OE) | |
224 | port->icount.overrun++; | |
225 | ||
226 | status &= port->read_status_mask; | |
227 | ||
228 | if (status & SR_BE) | |
229 | flg = TTY_BREAK; | |
230 | else if (status & SR_PE) | |
231 | flg = TTY_PARITY; | |
232 | else if (status & SR_FE) | |
233 | flg = TTY_FRAME; | |
234 | } | |
235 | ||
7d12e780 | 236 | if (uart_handle_sysrq_char(port, rx)) |
f8441e13 SH |
237 | continue; |
238 | ||
239 | uart_insert_char(port, status, SR_OE, rx, flg); | |
240 | } | |
241 | ||
242 | tty_flip_buffer_push(tty); | |
243 | return; | |
244 | } | |
245 | ||
7d12e780 | 246 | static irqreturn_t netx_int(int irq, void *dev_id) |
f8441e13 | 247 | { |
c7bec5ab | 248 | struct uart_port *port = dev_id; |
f8441e13 SH |
249 | unsigned long flags; |
250 | unsigned char status; | |
251 | ||
252 | spin_lock_irqsave(&port->lock,flags); | |
253 | ||
254 | status = readl(port->membase + UART_IIR) & IIR_MASK; | |
255 | while (status) { | |
256 | if (status & IIR_RIS) | |
7d12e780 | 257 | netx_rxint(port); |
f8441e13 SH |
258 | if (status & IIR_TIS) |
259 | netx_txint(port); | |
260 | if (status & IIR_MIS) { | |
261 | if (readl(port->membase + UART_FR) & FR_CTS) | |
262 | uart_handle_cts_change(port, 1); | |
263 | else | |
264 | uart_handle_cts_change(port, 0); | |
265 | } | |
266 | writel(0, port->membase + UART_IIR); | |
267 | status = readl(port->membase + UART_IIR) & IIR_MASK; | |
268 | } | |
269 | ||
270 | spin_unlock_irqrestore(&port->lock,flags); | |
271 | return IRQ_HANDLED; | |
272 | } | |
273 | ||
274 | static unsigned int netx_get_mctrl(struct uart_port *port) | |
275 | { | |
276 | unsigned int ret = TIOCM_DSR | TIOCM_CAR; | |
277 | ||
278 | if (readl(port->membase + UART_FR) & FR_CTS) | |
279 | ret |= TIOCM_CTS; | |
280 | ||
281 | return ret; | |
282 | } | |
283 | ||
284 | static void netx_set_mctrl(struct uart_port *port, unsigned int mctrl) | |
285 | { | |
286 | unsigned int val; | |
287 | ||
978e595f | 288 | /* FIXME: Locking needed ? */ |
f8441e13 SH |
289 | if (mctrl & TIOCM_RTS) { |
290 | val = readl(port->membase + UART_RTS_CR); | |
291 | writel(val | RTS_CR_RTS, port->membase + UART_RTS_CR); | |
292 | } | |
293 | } | |
294 | ||
295 | static void netx_break_ctl(struct uart_port *port, int break_state) | |
296 | { | |
297 | unsigned int line_cr; | |
298 | spin_lock_irq(&port->lock); | |
299 | ||
300 | line_cr = readl(port->membase + UART_LINE_CR); | |
301 | if (break_state != 0) | |
302 | line_cr |= LINE_CR_BRK; | |
303 | else | |
304 | line_cr &= ~LINE_CR_BRK; | |
305 | writel(line_cr, port->membase + UART_LINE_CR); | |
306 | ||
307 | spin_unlock_irq(&port->lock); | |
308 | } | |
309 | ||
310 | static int netx_startup(struct uart_port *port) | |
311 | { | |
312 | int ret; | |
313 | ||
314 | ret = request_irq(port->irq, netx_int, 0, | |
315 | DRIVER_NAME, port); | |
316 | if (ret) { | |
317 | dev_err(port->dev, "unable to grab irq%d\n",port->irq); | |
318 | goto exit; | |
319 | } | |
320 | ||
321 | writel(readl(port->membase + UART_LINE_CR) | LINE_CR_FEN, | |
322 | port->membase + UART_LINE_CR); | |
323 | ||
324 | writel(CR_MSIE | CR_RIE | CR_TIE | CR_RTIE | CR_UART_EN, | |
325 | port->membase + UART_CR); | |
326 | ||
327 | exit: | |
328 | return ret; | |
329 | } | |
330 | ||
331 | static void netx_shutdown(struct uart_port *port) | |
332 | { | |
333 | writel(0, port->membase + UART_CR) ; | |
334 | ||
335 | free_irq(port->irq, port); | |
336 | } | |
337 | ||
338 | static void | |
606d099c AC |
339 | netx_set_termios(struct uart_port *port, struct ktermios *termios, |
340 | struct ktermios *old) | |
f8441e13 SH |
341 | { |
342 | unsigned int baud, quot; | |
343 | unsigned char old_cr; | |
344 | unsigned char line_cr = LINE_CR_FEN; | |
345 | unsigned char rts_cr = 0; | |
346 | ||
347 | switch (termios->c_cflag & CSIZE) { | |
348 | case CS5: | |
349 | line_cr |= LINE_CR_5BIT; | |
350 | break; | |
351 | case CS6: | |
352 | line_cr |= LINE_CR_6BIT; | |
353 | break; | |
354 | case CS7: | |
355 | line_cr |= LINE_CR_7BIT; | |
356 | break; | |
357 | case CS8: | |
358 | line_cr |= LINE_CR_8BIT; | |
359 | break; | |
360 | } | |
361 | ||
362 | if (termios->c_cflag & CSTOPB) | |
363 | line_cr |= LINE_CR_STP2; | |
364 | ||
365 | if (termios->c_cflag & PARENB) { | |
366 | line_cr |= LINE_CR_PEN; | |
367 | if (!(termios->c_cflag & PARODD)) | |
368 | line_cr |= LINE_CR_EPS; | |
369 | } | |
370 | ||
371 | if (termios->c_cflag & CRTSCTS) | |
372 | rts_cr = RTS_CR_AUTO | RTS_CR_CTS_CTR | RTS_CR_RTS_POL; | |
373 | ||
374 | baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16); | |
375 | quot = baud * 4096; | |
376 | quot /= 1000; | |
377 | quot *= 256; | |
378 | quot /= 100000; | |
379 | ||
380 | spin_lock_irq(&port->lock); | |
381 | ||
382 | uart_update_timeout(port, termios->c_cflag, baud); | |
383 | ||
384 | old_cr = readl(port->membase + UART_CR); | |
385 | ||
386 | /* disable interrupts */ | |
387 | writel(old_cr & ~(CR_MSIE | CR_RIE | CR_TIE | CR_RTIE), | |
388 | port->membase + UART_CR); | |
389 | ||
390 | /* drain transmitter */ | |
391 | while (readl(port->membase + UART_FR) & FR_BUSY); | |
392 | ||
393 | /* disable UART */ | |
394 | writel(old_cr & ~CR_UART_EN, port->membase + UART_CR); | |
395 | ||
396 | /* modem status interrupts */ | |
397 | old_cr &= ~CR_MSIE; | |
398 | if (UART_ENABLE_MS(port, termios->c_cflag)) | |
399 | old_cr |= CR_MSIE; | |
400 | ||
401 | writel((quot>>8) & 0xff, port->membase + UART_BAUDDIV_MSB); | |
402 | writel(quot & 0xff, port->membase + UART_BAUDDIV_LSB); | |
403 | writel(line_cr, port->membase + UART_LINE_CR); | |
404 | ||
405 | writel(rts_cr, port->membase + UART_RTS_CR); | |
406 | ||
407 | /* | |
408 | * Characters to ignore | |
409 | */ | |
410 | port->ignore_status_mask = 0; | |
411 | if (termios->c_iflag & IGNPAR) | |
412 | port->ignore_status_mask |= SR_PE; | |
413 | if (termios->c_iflag & IGNBRK) { | |
414 | port->ignore_status_mask |= SR_BE; | |
415 | /* | |
416 | * If we're ignoring parity and break indicators, | |
417 | * ignore overruns too (for real raw support). | |
418 | */ | |
419 | if (termios->c_iflag & IGNPAR) | |
420 | port->ignore_status_mask |= SR_PE; | |
421 | } | |
422 | ||
423 | port->read_status_mask = 0; | |
424 | if (termios->c_iflag & (BRKINT | PARMRK)) | |
425 | port->read_status_mask |= SR_BE; | |
426 | if (termios->c_iflag & INPCK) | |
427 | port->read_status_mask |= SR_PE | SR_FE; | |
428 | ||
429 | writel(old_cr, port->membase + UART_CR); | |
430 | ||
431 | spin_unlock_irq(&port->lock); | |
432 | } | |
433 | ||
434 | static const char *netx_type(struct uart_port *port) | |
435 | { | |
436 | return port->type == PORT_NETX ? "NETX" : NULL; | |
437 | } | |
438 | ||
439 | static void netx_release_port(struct uart_port *port) | |
440 | { | |
441 | release_mem_region(port->mapbase, UART_PORT_SIZE); | |
442 | } | |
443 | ||
444 | static int netx_request_port(struct uart_port *port) | |
445 | { | |
446 | return request_mem_region(port->mapbase, UART_PORT_SIZE, | |
447 | DRIVER_NAME) != NULL ? 0 : -EBUSY; | |
448 | } | |
449 | ||
450 | static void netx_config_port(struct uart_port *port, int flags) | |
451 | { | |
452 | if (flags & UART_CONFIG_TYPE && netx_request_port(port) == 0) | |
453 | port->type = PORT_NETX; | |
454 | } | |
455 | ||
456 | static int | |
457 | netx_verify_port(struct uart_port *port, struct serial_struct *ser) | |
458 | { | |
459 | int ret = 0; | |
460 | ||
461 | if (ser->type != PORT_UNKNOWN && ser->type != PORT_NETX) | |
462 | ret = -EINVAL; | |
463 | ||
464 | return ret; | |
465 | } | |
466 | ||
467 | static struct uart_ops netx_pops = { | |
468 | .tx_empty = netx_tx_empty, | |
469 | .set_mctrl = netx_set_mctrl, | |
470 | .get_mctrl = netx_get_mctrl, | |
471 | .stop_tx = netx_stop_tx, | |
472 | .start_tx = netx_start_tx, | |
473 | .stop_rx = netx_stop_rx, | |
474 | .enable_ms = netx_enable_ms, | |
475 | .break_ctl = netx_break_ctl, | |
476 | .startup = netx_startup, | |
477 | .shutdown = netx_shutdown, | |
478 | .set_termios = netx_set_termios, | |
479 | .type = netx_type, | |
480 | .release_port = netx_release_port, | |
481 | .request_port = netx_request_port, | |
482 | .config_port = netx_config_port, | |
483 | .verify_port = netx_verify_port, | |
484 | }; | |
485 | ||
486 | static struct netx_port netx_ports[] = { | |
487 | { | |
488 | .port = { | |
489 | .type = PORT_NETX, | |
490 | .iotype = UPIO_MEM, | |
491 | .membase = (char __iomem *)io_p2v(NETX_PA_UART0), | |
492 | .mapbase = NETX_PA_UART0, | |
493 | .irq = NETX_IRQ_UART0, | |
494 | .uartclk = 100000000, | |
495 | .fifosize = 16, | |
496 | .flags = UPF_BOOT_AUTOCONF, | |
497 | .ops = &netx_pops, | |
498 | .line = 0, | |
499 | }, | |
500 | }, { | |
501 | .port = { | |
502 | .type = PORT_NETX, | |
503 | .iotype = UPIO_MEM, | |
504 | .membase = (char __iomem *)io_p2v(NETX_PA_UART1), | |
505 | .mapbase = NETX_PA_UART1, | |
506 | .irq = NETX_IRQ_UART1, | |
507 | .uartclk = 100000000, | |
508 | .fifosize = 16, | |
509 | .flags = UPF_BOOT_AUTOCONF, | |
510 | .ops = &netx_pops, | |
511 | .line = 1, | |
512 | }, | |
513 | }, { | |
514 | .port = { | |
515 | .type = PORT_NETX, | |
516 | .iotype = UPIO_MEM, | |
517 | .membase = (char __iomem *)io_p2v(NETX_PA_UART2), | |
518 | .mapbase = NETX_PA_UART2, | |
519 | .irq = NETX_IRQ_UART2, | |
520 | .uartclk = 100000000, | |
521 | .fifosize = 16, | |
522 | .flags = UPF_BOOT_AUTOCONF, | |
523 | .ops = &netx_pops, | |
524 | .line = 2, | |
525 | }, | |
526 | } | |
527 | }; | |
528 | ||
fb881f78 PB |
529 | #ifdef CONFIG_SERIAL_NETX_CONSOLE |
530 | ||
f8441e13 SH |
531 | static void netx_console_putchar(struct uart_port *port, int ch) |
532 | { | |
533 | while (readl(port->membase + UART_FR) & FR_BUSY); | |
534 | writel(ch, port->membase + UART_DR); | |
535 | } | |
536 | ||
537 | static void | |
538 | netx_console_write(struct console *co, const char *s, unsigned int count) | |
539 | { | |
540 | struct uart_port *port = &netx_ports[co->index].port; | |
541 | unsigned char cr_save; | |
542 | ||
543 | cr_save = readl(port->membase + UART_CR); | |
544 | writel(cr_save | CR_UART_EN, port->membase + UART_CR); | |
545 | ||
546 | uart_console_write(port, s, count, netx_console_putchar); | |
547 | ||
548 | while (readl(port->membase + UART_FR) & FR_BUSY); | |
549 | writel(cr_save, port->membase + UART_CR); | |
550 | } | |
551 | ||
552 | static void __init | |
553 | netx_console_get_options(struct uart_port *port, int *baud, | |
554 | int *parity, int *bits, int *flow) | |
555 | { | |
556 | unsigned char line_cr; | |
557 | ||
558 | *baud = (readl(port->membase + UART_BAUDDIV_MSB) << 8) | | |
559 | readl(port->membase + UART_BAUDDIV_LSB); | |
560 | *baud *= 1000; | |
561 | *baud /= 4096; | |
562 | *baud *= 1000; | |
563 | *baud /= 256; | |
564 | *baud *= 100; | |
565 | ||
566 | line_cr = readl(port->membase + UART_LINE_CR); | |
567 | *parity = 'n'; | |
568 | if (line_cr & LINE_CR_PEN) { | |
569 | if (line_cr & LINE_CR_EPS) | |
570 | *parity = 'e'; | |
571 | else | |
572 | *parity = 'o'; | |
573 | } | |
574 | ||
575 | switch (line_cr & LINE_CR_BITS_MASK) { | |
576 | case LINE_CR_8BIT: | |
577 | *bits = 8; | |
578 | break; | |
579 | case LINE_CR_7BIT: | |
580 | *bits = 7; | |
581 | break; | |
582 | case LINE_CR_6BIT: | |
583 | *bits = 6; | |
584 | break; | |
585 | case LINE_CR_5BIT: | |
586 | *bits = 5; | |
587 | break; | |
588 | } | |
589 | ||
590 | if (readl(port->membase + UART_RTS_CR) & RTS_CR_AUTO) | |
591 | *flow = 'r'; | |
592 | } | |
593 | ||
594 | static int __init | |
595 | netx_console_setup(struct console *co, char *options) | |
596 | { | |
597 | struct netx_port *sport; | |
598 | int baud = 9600; | |
599 | int bits = 8; | |
600 | int parity = 'n'; | |
601 | int flow = 'n'; | |
602 | ||
603 | /* | |
604 | * Check whether an invalid uart number has been specified, and | |
605 | * if so, search for the first available port that does have | |
606 | * console support. | |
607 | */ | |
608 | if (co->index == -1 || co->index >= ARRAY_SIZE(netx_ports)) | |
609 | co->index = 0; | |
610 | sport = &netx_ports[co->index]; | |
611 | ||
612 | if (options) { | |
613 | uart_parse_options(options, &baud, &parity, &bits, &flow); | |
614 | } else { | |
615 | /* if the UART is enabled, assume it has been correctly setup | |
616 | * by the bootloader and get the options | |
617 | */ | |
618 | if (readl(sport->port.membase + UART_CR) & CR_UART_EN) { | |
619 | netx_console_get_options(&sport->port, &baud, | |
620 | &parity, &bits, &flow); | |
621 | } | |
622 | ||
623 | } | |
624 | ||
625 | return uart_set_options(&sport->port, co, baud, parity, bits, flow); | |
626 | } | |
627 | ||
628 | static struct uart_driver netx_reg; | |
629 | static struct console netx_console = { | |
630 | .name = "ttyNX", | |
631 | .write = netx_console_write, | |
632 | .device = uart_console_device, | |
633 | .setup = netx_console_setup, | |
634 | .flags = CON_PRINTBUFFER, | |
635 | .index = -1, | |
636 | .data = &netx_reg, | |
637 | }; | |
638 | ||
639 | static int __init netx_console_init(void) | |
640 | { | |
641 | register_console(&netx_console); | |
642 | return 0; | |
643 | } | |
644 | console_initcall(netx_console_init); | |
645 | ||
646 | #define NETX_CONSOLE &netx_console | |
647 | #else | |
648 | #define NETX_CONSOLE NULL | |
649 | #endif | |
650 | ||
651 | static struct uart_driver netx_reg = { | |
652 | .owner = THIS_MODULE, | |
653 | .driver_name = DRIVER_NAME, | |
654 | .dev_name = "ttyNX", | |
655 | .major = SERIAL_NX_MAJOR, | |
656 | .minor = MINOR_START, | |
657 | .nr = ARRAY_SIZE(netx_ports), | |
658 | .cons = NETX_CONSOLE, | |
659 | }; | |
660 | ||
661 | static int serial_netx_suspend(struct platform_device *pdev, pm_message_t state) | |
662 | { | |
663 | struct netx_port *sport = platform_get_drvdata(pdev); | |
664 | ||
665 | if (sport) | |
666 | uart_suspend_port(&netx_reg, &sport->port); | |
667 | ||
668 | return 0; | |
669 | } | |
670 | ||
671 | static int serial_netx_resume(struct platform_device *pdev) | |
672 | { | |
673 | struct netx_port *sport = platform_get_drvdata(pdev); | |
674 | ||
675 | if (sport) | |
676 | uart_resume_port(&netx_reg, &sport->port); | |
677 | ||
678 | return 0; | |
679 | } | |
680 | ||
681 | static int serial_netx_probe(struct platform_device *pdev) | |
682 | { | |
683 | struct uart_port *port = &netx_ports[pdev->id].port; | |
684 | ||
685 | dev_info(&pdev->dev, "initialising\n"); | |
686 | ||
687 | port->dev = &pdev->dev; | |
688 | ||
689 | writel(1, port->membase + UART_RXFIFO_IRQLEVEL); | |
690 | uart_add_one_port(&netx_reg, &netx_ports[pdev->id].port); | |
691 | platform_set_drvdata(pdev, &netx_ports[pdev->id]); | |
692 | ||
693 | return 0; | |
694 | } | |
695 | ||
696 | static int serial_netx_remove(struct platform_device *pdev) | |
697 | { | |
698 | struct netx_port *sport = platform_get_drvdata(pdev); | |
699 | ||
700 | platform_set_drvdata(pdev, NULL); | |
701 | ||
702 | if (sport) | |
703 | uart_remove_one_port(&netx_reg, &sport->port); | |
704 | ||
705 | return 0; | |
706 | } | |
707 | ||
708 | static struct platform_driver serial_netx_driver = { | |
709 | .probe = serial_netx_probe, | |
710 | .remove = serial_netx_remove, | |
711 | ||
712 | .suspend = serial_netx_suspend, | |
713 | .resume = serial_netx_resume, | |
714 | ||
715 | .driver = { | |
716 | .name = DRIVER_NAME, | |
e169c139 | 717 | .owner = THIS_MODULE, |
f8441e13 SH |
718 | }, |
719 | }; | |
720 | ||
721 | static int __init netx_serial_init(void) | |
722 | { | |
723 | int ret; | |
724 | ||
725 | printk(KERN_INFO "Serial: NetX driver\n"); | |
726 | ||
727 | ret = uart_register_driver(&netx_reg); | |
728 | if (ret) | |
729 | return ret; | |
730 | ||
731 | ret = platform_driver_register(&serial_netx_driver); | |
732 | if (ret != 0) | |
733 | uart_unregister_driver(&netx_reg); | |
734 | ||
735 | return 0; | |
736 | } | |
737 | ||
738 | static void __exit netx_serial_exit(void) | |
739 | { | |
740 | platform_driver_unregister(&serial_netx_driver); | |
741 | uart_unregister_driver(&netx_reg); | |
742 | } | |
743 | ||
744 | module_init(netx_serial_init); | |
745 | module_exit(netx_serial_exit); | |
746 | ||
747 | MODULE_AUTHOR("Sascha Hauer"); | |
748 | MODULE_DESCRIPTION("NetX serial port driver"); | |
749 | MODULE_LICENSE("GPL"); | |
e169c139 | 750 | MODULE_ALIAS("platform:" DRIVER_NAME); |