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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * drivers/serial/serial_txx9.c | |
3 | * | |
4 | * Derived from many drivers using generic_serial interface, | |
5 | * especially serial_tx3912.c by Steven J. Hill and r39xx_serial.c | |
6 | * (was in Linux/VR tree) by Jim Pick. | |
7 | * | |
8 | * Copyright (C) 1999 Harald Koerfgen | |
9 | * Copyright (C) 2000 Jim Pick <jim@jimpick.com> | |
10 | * Copyright (C) 2001 Steven J. Hill (sjhill@realitydiluted.com) | |
11 | * Copyright (C) 2000-2002 Toshiba Corporation | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License version 2 as | |
15 | * published by the Free Software Foundation. | |
16 | * | |
17 | * Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller | |
18 | * | |
19 | * Revision History: | |
20 | * 0.30 Initial revision. (Renamed from serial_txx927.c) | |
21 | * 0.31 Use save_flags instead of local_irq_save. | |
22 | * 0.32 Support SCLK. | |
23 | * 0.33 Switch TXX9_TTY_NAME by CONFIG_SERIAL_TXX9_STDSERIAL. | |
24 | * Support TIOCSERGETLSR. | |
25 | * 0.34 Support slow baudrate. | |
26 | * 0.40 Merge codes from mainstream kernel (2.4.22). | |
27 | * 0.41 Fix console checking in rs_shutdown_port(). | |
28 | * Disable flow-control in serial_console_write(). | |
29 | * 0.42 Fix minor compiler warning. | |
30 | * 1.00 Kernel 2.6. Converted to new serial core (based on 8250.c). | |
31 | * 1.01 Set fifosize to make tx_empry called properly. | |
32 | * Use standard uart_get_divisor. | |
33 | * 1.02 Cleanup. (import 8250.c changes) | |
f5ee56cc RB |
34 | * 1.03 Fix low-latency mode. (import 8250.c changes) |
35 | * 1.04 Remove usage of deprecated functions, cleanup. | |
83485f82 AN |
36 | * 1.05 More strict check in verify_port. Cleanup. |
37 | * 1.06 Do not insert a char caused previous overrun. | |
38 | * Fix some spin_locks. | |
39 | * Do not call uart_add_one_port for absent ports. | |
1da177e4 | 40 | */ |
1da177e4 LT |
41 | |
42 | #if defined(CONFIG_SERIAL_TXX9_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) | |
43 | #define SUPPORT_SYSRQ | |
44 | #endif | |
45 | ||
46 | #include <linux/module.h> | |
47 | #include <linux/ioport.h> | |
48 | #include <linux/init.h> | |
49 | #include <linux/console.h> | |
50 | #include <linux/sysrq.h> | |
51 | #include <linux/delay.h> | |
52 | #include <linux/device.h> | |
53 | #include <linux/pci.h> | |
54 | #include <linux/tty.h> | |
55 | #include <linux/tty_flip.h> | |
56 | #include <linux/serial_core.h> | |
57 | #include <linux/serial.h> | |
f392ecfa | 58 | #include <linux/mutex.h> |
1da177e4 LT |
59 | |
60 | #include <asm/io.h> | |
61 | #include <asm/irq.h> | |
62 | ||
83485f82 | 63 | static char *serial_version = "1.06"; |
1da177e4 LT |
64 | static char *serial_name = "TX39/49 Serial driver"; |
65 | ||
66 | #define PASS_LIMIT 256 | |
67 | ||
68 | #if !defined(CONFIG_SERIAL_TXX9_STDSERIAL) | |
69 | /* "ttyS" is used for standard serial driver */ | |
70 | #define TXX9_TTY_NAME "ttyTX" | |
1da177e4 LT |
71 | #define TXX9_TTY_MINOR_START (64 + 64) /* ttyTX0(128), ttyTX1(129) */ |
72 | #else | |
73 | /* acts like standard serial driver */ | |
74 | #define TXX9_TTY_NAME "ttyS" | |
1da177e4 LT |
75 | #define TXX9_TTY_MINOR_START 64 |
76 | #endif | |
77 | #define TXX9_TTY_MAJOR TTY_MAJOR | |
78 | ||
79 | /* flag aliases */ | |
80 | #define UPF_TXX9_HAVE_CTS_LINE UPF_BUGGY_UART | |
81 | #define UPF_TXX9_USE_SCLK UPF_MAGIC_MULTIPLIER | |
82 | ||
83 | #ifdef CONFIG_PCI | |
84 | /* support for Toshiba TC86C001 SIO */ | |
85 | #define ENABLE_SERIAL_TXX9_PCI | |
86 | #endif | |
87 | ||
88 | /* | |
89 | * Number of serial ports | |
90 | */ | |
91 | #ifdef ENABLE_SERIAL_TXX9_PCI | |
92 | #define NR_PCI_BOARDS 4 | |
f5ee56cc | 93 | #define UART_NR (4 + NR_PCI_BOARDS) |
1da177e4 | 94 | #else |
f5ee56cc | 95 | #define UART_NR 4 |
1da177e4 LT |
96 | #endif |
97 | ||
83485f82 AN |
98 | #define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8) |
99 | ||
1da177e4 LT |
100 | struct uart_txx9_port { |
101 | struct uart_port port; | |
102 | ||
103 | /* | |
104 | * We provide a per-port pm hook. | |
105 | */ | |
106 | void (*pm)(struct uart_port *port, | |
107 | unsigned int state, unsigned int old); | |
108 | }; | |
109 | ||
110 | #define TXX9_REGION_SIZE 0x24 | |
111 | ||
112 | /* TXX9 Serial Registers */ | |
113 | #define TXX9_SILCR 0x00 | |
114 | #define TXX9_SIDICR 0x04 | |
115 | #define TXX9_SIDISR 0x08 | |
116 | #define TXX9_SICISR 0x0c | |
117 | #define TXX9_SIFCR 0x10 | |
118 | #define TXX9_SIFLCR 0x14 | |
119 | #define TXX9_SIBGR 0x18 | |
120 | #define TXX9_SITFIFO 0x1c | |
121 | #define TXX9_SIRFIFO 0x20 | |
122 | ||
123 | /* SILCR : Line Control */ | |
124 | #define TXX9_SILCR_SCS_MASK 0x00000060 | |
125 | #define TXX9_SILCR_SCS_IMCLK 0x00000000 | |
126 | #define TXX9_SILCR_SCS_IMCLK_BG 0x00000020 | |
127 | #define TXX9_SILCR_SCS_SCLK 0x00000040 | |
128 | #define TXX9_SILCR_SCS_SCLK_BG 0x00000060 | |
129 | #define TXX9_SILCR_UEPS 0x00000010 | |
130 | #define TXX9_SILCR_UPEN 0x00000008 | |
131 | #define TXX9_SILCR_USBL_MASK 0x00000004 | |
132 | #define TXX9_SILCR_USBL_1BIT 0x00000000 | |
133 | #define TXX9_SILCR_USBL_2BIT 0x00000004 | |
134 | #define TXX9_SILCR_UMODE_MASK 0x00000003 | |
135 | #define TXX9_SILCR_UMODE_8BIT 0x00000000 | |
136 | #define TXX9_SILCR_UMODE_7BIT 0x00000001 | |
137 | ||
138 | /* SIDICR : DMA/Int. Control */ | |
139 | #define TXX9_SIDICR_TDE 0x00008000 | |
140 | #define TXX9_SIDICR_RDE 0x00004000 | |
141 | #define TXX9_SIDICR_TIE 0x00002000 | |
142 | #define TXX9_SIDICR_RIE 0x00001000 | |
143 | #define TXX9_SIDICR_SPIE 0x00000800 | |
144 | #define TXX9_SIDICR_CTSAC 0x00000600 | |
145 | #define TXX9_SIDICR_STIE_MASK 0x0000003f | |
146 | #define TXX9_SIDICR_STIE_OERS 0x00000020 | |
147 | #define TXX9_SIDICR_STIE_CTSS 0x00000010 | |
148 | #define TXX9_SIDICR_STIE_RBRKD 0x00000008 | |
149 | #define TXX9_SIDICR_STIE_TRDY 0x00000004 | |
150 | #define TXX9_SIDICR_STIE_TXALS 0x00000002 | |
151 | #define TXX9_SIDICR_STIE_UBRKD 0x00000001 | |
152 | ||
153 | /* SIDISR : DMA/Int. Status */ | |
154 | #define TXX9_SIDISR_UBRK 0x00008000 | |
155 | #define TXX9_SIDISR_UVALID 0x00004000 | |
156 | #define TXX9_SIDISR_UFER 0x00002000 | |
157 | #define TXX9_SIDISR_UPER 0x00001000 | |
158 | #define TXX9_SIDISR_UOER 0x00000800 | |
159 | #define TXX9_SIDISR_ERI 0x00000400 | |
160 | #define TXX9_SIDISR_TOUT 0x00000200 | |
161 | #define TXX9_SIDISR_TDIS 0x00000100 | |
162 | #define TXX9_SIDISR_RDIS 0x00000080 | |
163 | #define TXX9_SIDISR_STIS 0x00000040 | |
164 | #define TXX9_SIDISR_RFDN_MASK 0x0000001f | |
165 | ||
166 | /* SICISR : Change Int. Status */ | |
167 | #define TXX9_SICISR_OERS 0x00000020 | |
168 | #define TXX9_SICISR_CTSS 0x00000010 | |
169 | #define TXX9_SICISR_RBRKD 0x00000008 | |
170 | #define TXX9_SICISR_TRDY 0x00000004 | |
171 | #define TXX9_SICISR_TXALS 0x00000002 | |
172 | #define TXX9_SICISR_UBRKD 0x00000001 | |
173 | ||
174 | /* SIFCR : FIFO Control */ | |
175 | #define TXX9_SIFCR_SWRST 0x00008000 | |
176 | #define TXX9_SIFCR_RDIL_MASK 0x00000180 | |
177 | #define TXX9_SIFCR_RDIL_1 0x00000000 | |
178 | #define TXX9_SIFCR_RDIL_4 0x00000080 | |
179 | #define TXX9_SIFCR_RDIL_8 0x00000100 | |
180 | #define TXX9_SIFCR_RDIL_12 0x00000180 | |
181 | #define TXX9_SIFCR_RDIL_MAX 0x00000180 | |
182 | #define TXX9_SIFCR_TDIL_MASK 0x00000018 | |
183 | #define TXX9_SIFCR_TDIL_MASK 0x00000018 | |
184 | #define TXX9_SIFCR_TDIL_1 0x00000000 | |
185 | #define TXX9_SIFCR_TDIL_4 0x00000001 | |
186 | #define TXX9_SIFCR_TDIL_8 0x00000010 | |
187 | #define TXX9_SIFCR_TDIL_MAX 0x00000010 | |
188 | #define TXX9_SIFCR_TFRST 0x00000004 | |
189 | #define TXX9_SIFCR_RFRST 0x00000002 | |
190 | #define TXX9_SIFCR_FRSTE 0x00000001 | |
191 | #define TXX9_SIO_TX_FIFO 8 | |
192 | #define TXX9_SIO_RX_FIFO 16 | |
193 | ||
194 | /* SIFLCR : Flow Control */ | |
195 | #define TXX9_SIFLCR_RCS 0x00001000 | |
196 | #define TXX9_SIFLCR_TES 0x00000800 | |
197 | #define TXX9_SIFLCR_RTSSC 0x00000200 | |
198 | #define TXX9_SIFLCR_RSDE 0x00000100 | |
199 | #define TXX9_SIFLCR_TSDE 0x00000080 | |
200 | #define TXX9_SIFLCR_RTSTL_MASK 0x0000001e | |
201 | #define TXX9_SIFLCR_RTSTL_MAX 0x0000001e | |
202 | #define TXX9_SIFLCR_TBRK 0x00000001 | |
203 | ||
204 | /* SIBGR : Baudrate Control */ | |
205 | #define TXX9_SIBGR_BCLK_MASK 0x00000300 | |
206 | #define TXX9_SIBGR_BCLK_T0 0x00000000 | |
207 | #define TXX9_SIBGR_BCLK_T2 0x00000100 | |
208 | #define TXX9_SIBGR_BCLK_T4 0x00000200 | |
209 | #define TXX9_SIBGR_BCLK_T6 0x00000300 | |
210 | #define TXX9_SIBGR_BRD_MASK 0x000000ff | |
211 | ||
212 | static inline unsigned int sio_in(struct uart_txx9_port *up, int offset) | |
213 | { | |
214 | switch (up->port.iotype) { | |
215 | default: | |
83485f82 | 216 | return __raw_readl(up->port.membase + offset); |
1da177e4 LT |
217 | case UPIO_PORT: |
218 | return inl(up->port.iobase + offset); | |
219 | } | |
220 | } | |
221 | ||
222 | static inline void | |
223 | sio_out(struct uart_txx9_port *up, int offset, int value) | |
224 | { | |
225 | switch (up->port.iotype) { | |
226 | default: | |
83485f82 | 227 | __raw_writel(value, up->port.membase + offset); |
1da177e4 LT |
228 | break; |
229 | case UPIO_PORT: | |
230 | outl(value, up->port.iobase + offset); | |
231 | break; | |
232 | } | |
233 | } | |
234 | ||
235 | static inline void | |
236 | sio_mask(struct uart_txx9_port *up, int offset, unsigned int value) | |
237 | { | |
238 | sio_out(up, offset, sio_in(up, offset) & ~value); | |
239 | } | |
240 | static inline void | |
241 | sio_set(struct uart_txx9_port *up, int offset, unsigned int value) | |
242 | { | |
243 | sio_out(up, offset, sio_in(up, offset) | value); | |
244 | } | |
245 | ||
246 | static inline void | |
247 | sio_quot_set(struct uart_txx9_port *up, int quot) | |
248 | { | |
249 | quot >>= 1; | |
250 | if (quot < 256) | |
251 | sio_out(up, TXX9_SIBGR, quot | TXX9_SIBGR_BCLK_T0); | |
252 | else if (quot < (256 << 2)) | |
253 | sio_out(up, TXX9_SIBGR, (quot >> 2) | TXX9_SIBGR_BCLK_T2); | |
254 | else if (quot < (256 << 4)) | |
255 | sio_out(up, TXX9_SIBGR, (quot >> 4) | TXX9_SIBGR_BCLK_T4); | |
256 | else if (quot < (256 << 6)) | |
257 | sio_out(up, TXX9_SIBGR, (quot >> 6) | TXX9_SIBGR_BCLK_T6); | |
258 | else | |
259 | sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6); | |
260 | } | |
261 | ||
b129a8cc | 262 | static void serial_txx9_stop_tx(struct uart_port *port) |
1da177e4 LT |
263 | { |
264 | struct uart_txx9_port *up = (struct uart_txx9_port *)port; | |
1da177e4 | 265 | sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE); |
1da177e4 LT |
266 | } |
267 | ||
b129a8cc | 268 | static void serial_txx9_start_tx(struct uart_port *port) |
1da177e4 LT |
269 | { |
270 | struct uart_txx9_port *up = (struct uart_txx9_port *)port; | |
1da177e4 | 271 | sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE); |
1da177e4 LT |
272 | } |
273 | ||
274 | static void serial_txx9_stop_rx(struct uart_port *port) | |
275 | { | |
276 | struct uart_txx9_port *up = (struct uart_txx9_port *)port; | |
1da177e4 | 277 | up->port.read_status_mask &= ~TXX9_SIDISR_RDIS; |
1da177e4 LT |
278 | } |
279 | ||
280 | static void serial_txx9_enable_ms(struct uart_port *port) | |
281 | { | |
282 | /* TXX9-SIO can not control DTR... */ | |
283 | } | |
284 | ||
285 | static inline void | |
286 | receive_chars(struct uart_txx9_port *up, unsigned int *status, struct pt_regs *regs) | |
287 | { | |
288 | struct tty_struct *tty = up->port.info->tty; | |
289 | unsigned char ch; | |
290 | unsigned int disr = *status; | |
291 | int max_count = 256; | |
292 | char flag; | |
83485f82 | 293 | unsigned int next_ignore_status_mask; |
1da177e4 LT |
294 | |
295 | do { | |
1da177e4 LT |
296 | ch = sio_in(up, TXX9_SIRFIFO); |
297 | flag = TTY_NORMAL; | |
298 | up->port.icount.rx++; | |
299 | ||
83485f82 AN |
300 | /* mask out RFDN_MASK bit added by previous overrun */ |
301 | next_ignore_status_mask = | |
302 | up->port.ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK; | |
1da177e4 LT |
303 | if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER | |
304 | TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) { | |
305 | /* | |
306 | * For statistics only | |
307 | */ | |
308 | if (disr & TXX9_SIDISR_UBRK) { | |
309 | disr &= ~(TXX9_SIDISR_UFER | TXX9_SIDISR_UPER); | |
310 | up->port.icount.brk++; | |
311 | /* | |
312 | * We do the SysRQ and SAK checking | |
313 | * here because otherwise the break | |
314 | * may get masked by ignore_status_mask | |
315 | * or read_status_mask. | |
316 | */ | |
317 | if (uart_handle_break(&up->port)) | |
318 | goto ignore_char; | |
319 | } else if (disr & TXX9_SIDISR_UPER) | |
320 | up->port.icount.parity++; | |
321 | else if (disr & TXX9_SIDISR_UFER) | |
322 | up->port.icount.frame++; | |
83485f82 | 323 | if (disr & TXX9_SIDISR_UOER) { |
1da177e4 | 324 | up->port.icount.overrun++; |
83485f82 AN |
325 | /* |
326 | * The receiver read buffer still hold | |
327 | * a char which caused overrun. | |
328 | * Ignore next char by adding RFDN_MASK | |
329 | * to ignore_status_mask temporarily. | |
330 | */ | |
331 | next_ignore_status_mask |= | |
332 | TXX9_SIDISR_RFDN_MASK; | |
333 | } | |
1da177e4 LT |
334 | |
335 | /* | |
336 | * Mask off conditions which should be ingored. | |
337 | */ | |
338 | disr &= up->port.read_status_mask; | |
339 | ||
340 | if (disr & TXX9_SIDISR_UBRK) { | |
341 | flag = TTY_BREAK; | |
342 | } else if (disr & TXX9_SIDISR_UPER) | |
343 | flag = TTY_PARITY; | |
344 | else if (disr & TXX9_SIDISR_UFER) | |
345 | flag = TTY_FRAME; | |
346 | } | |
347 | if (uart_handle_sysrq_char(&up->port, ch, regs)) | |
348 | goto ignore_char; | |
05ab3014 RK |
349 | |
350 | uart_insert_char(&up->port, disr, TXX9_SIDISR_UOER, ch, flag); | |
351 | ||
1da177e4 | 352 | ignore_char: |
83485f82 | 353 | up->port.ignore_status_mask = next_ignore_status_mask; |
1da177e4 LT |
354 | disr = sio_in(up, TXX9_SIDISR); |
355 | } while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0)); | |
f5ee56cc | 356 | spin_unlock(&up->port.lock); |
1da177e4 | 357 | tty_flip_buffer_push(tty); |
f5ee56cc | 358 | spin_lock(&up->port.lock); |
1da177e4 LT |
359 | *status = disr; |
360 | } | |
361 | ||
362 | static inline void transmit_chars(struct uart_txx9_port *up) | |
363 | { | |
364 | struct circ_buf *xmit = &up->port.info->xmit; | |
365 | int count; | |
366 | ||
367 | if (up->port.x_char) { | |
368 | sio_out(up, TXX9_SITFIFO, up->port.x_char); | |
369 | up->port.icount.tx++; | |
370 | up->port.x_char = 0; | |
371 | return; | |
372 | } | |
373 | if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { | |
b129a8cc | 374 | serial_txx9_stop_tx(&up->port); |
1da177e4 LT |
375 | return; |
376 | } | |
377 | ||
378 | count = TXX9_SIO_TX_FIFO; | |
379 | do { | |
380 | sio_out(up, TXX9_SITFIFO, xmit->buf[xmit->tail]); | |
381 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); | |
382 | up->port.icount.tx++; | |
383 | if (uart_circ_empty(xmit)) | |
384 | break; | |
385 | } while (--count > 0); | |
386 | ||
387 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
388 | uart_write_wakeup(&up->port); | |
389 | ||
390 | if (uart_circ_empty(xmit)) | |
b129a8cc | 391 | serial_txx9_stop_tx(&up->port); |
1da177e4 LT |
392 | } |
393 | ||
394 | static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id, struct pt_regs *regs) | |
395 | { | |
396 | int pass_counter = 0; | |
397 | struct uart_txx9_port *up = dev_id; | |
398 | unsigned int status; | |
399 | ||
400 | while (1) { | |
401 | spin_lock(&up->port.lock); | |
402 | status = sio_in(up, TXX9_SIDISR); | |
403 | if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE)) | |
404 | status &= ~TXX9_SIDISR_TDIS; | |
405 | if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS | | |
406 | TXX9_SIDISR_TOUT))) { | |
407 | spin_unlock(&up->port.lock); | |
408 | break; | |
409 | } | |
410 | ||
411 | if (status & TXX9_SIDISR_RDIS) | |
412 | receive_chars(up, &status, regs); | |
413 | if (status & TXX9_SIDISR_TDIS) | |
414 | transmit_chars(up); | |
415 | /* Clear TX/RX Int. Status */ | |
416 | sio_mask(up, TXX9_SIDISR, | |
417 | TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS | | |
418 | TXX9_SIDISR_TOUT); | |
419 | spin_unlock(&up->port.lock); | |
420 | ||
421 | if (pass_counter++ > PASS_LIMIT) | |
422 | break; | |
423 | } | |
424 | ||
425 | return pass_counter ? IRQ_HANDLED : IRQ_NONE; | |
426 | } | |
427 | ||
428 | static unsigned int serial_txx9_tx_empty(struct uart_port *port) | |
429 | { | |
430 | struct uart_txx9_port *up = (struct uart_txx9_port *)port; | |
431 | unsigned long flags; | |
432 | unsigned int ret; | |
433 | ||
434 | spin_lock_irqsave(&up->port.lock, flags); | |
435 | ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0; | |
436 | spin_unlock_irqrestore(&up->port.lock, flags); | |
437 | ||
438 | return ret; | |
439 | } | |
440 | ||
441 | static unsigned int serial_txx9_get_mctrl(struct uart_port *port) | |
442 | { | |
443 | struct uart_txx9_port *up = (struct uart_txx9_port *)port; | |
1da177e4 LT |
444 | unsigned int ret; |
445 | ||
1da177e4 LT |
446 | ret = ((sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS) |
447 | | ((sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS); | |
1da177e4 LT |
448 | |
449 | return ret; | |
450 | } | |
451 | ||
452 | static void serial_txx9_set_mctrl(struct uart_port *port, unsigned int mctrl) | |
453 | { | |
454 | struct uart_txx9_port *up = (struct uart_txx9_port *)port; | |
1da177e4 | 455 | |
1da177e4 LT |
456 | if (mctrl & TIOCM_RTS) |
457 | sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC); | |
458 | else | |
459 | sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC); | |
1da177e4 LT |
460 | } |
461 | ||
462 | static void serial_txx9_break_ctl(struct uart_port *port, int break_state) | |
463 | { | |
464 | struct uart_txx9_port *up = (struct uart_txx9_port *)port; | |
465 | unsigned long flags; | |
466 | ||
467 | spin_lock_irqsave(&up->port.lock, flags); | |
468 | if (break_state == -1) | |
469 | sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); | |
470 | else | |
471 | sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); | |
472 | spin_unlock_irqrestore(&up->port.lock, flags); | |
473 | } | |
474 | ||
475 | static int serial_txx9_startup(struct uart_port *port) | |
476 | { | |
477 | struct uart_txx9_port *up = (struct uart_txx9_port *)port; | |
478 | unsigned long flags; | |
479 | int retval; | |
480 | ||
481 | /* | |
482 | * Clear the FIFO buffers and disable them. | |
7f927fcc | 483 | * (they will be reenabled in set_termios()) |
1da177e4 LT |
484 | */ |
485 | sio_set(up, TXX9_SIFCR, | |
486 | TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); | |
487 | /* clear reset */ | |
488 | sio_mask(up, TXX9_SIFCR, | |
489 | TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); | |
490 | sio_out(up, TXX9_SIDICR, 0); | |
491 | ||
492 | /* | |
493 | * Clear the interrupt registers. | |
494 | */ | |
495 | sio_out(up, TXX9_SIDISR, 0); | |
496 | ||
497 | retval = request_irq(up->port.irq, serial_txx9_interrupt, | |
40663cc7 | 498 | IRQF_SHARED, "serial_txx9", up); |
1da177e4 LT |
499 | if (retval) |
500 | return retval; | |
501 | ||
502 | /* | |
503 | * Now, initialize the UART | |
504 | */ | |
505 | spin_lock_irqsave(&up->port.lock, flags); | |
506 | serial_txx9_set_mctrl(&up->port, up->port.mctrl); | |
507 | spin_unlock_irqrestore(&up->port.lock, flags); | |
508 | ||
509 | /* Enable RX/TX */ | |
510 | sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE); | |
511 | ||
512 | /* | |
513 | * Finally, enable interrupts. | |
514 | */ | |
515 | sio_set(up, TXX9_SIDICR, TXX9_SIDICR_RIE); | |
516 | ||
517 | return 0; | |
518 | } | |
519 | ||
520 | static void serial_txx9_shutdown(struct uart_port *port) | |
521 | { | |
522 | struct uart_txx9_port *up = (struct uart_txx9_port *)port; | |
523 | unsigned long flags; | |
524 | ||
525 | /* | |
526 | * Disable interrupts from this port | |
527 | */ | |
528 | sio_out(up, TXX9_SIDICR, 0); /* disable all intrs */ | |
529 | ||
530 | spin_lock_irqsave(&up->port.lock, flags); | |
531 | serial_txx9_set_mctrl(&up->port, up->port.mctrl); | |
532 | spin_unlock_irqrestore(&up->port.lock, flags); | |
533 | ||
534 | /* | |
535 | * Disable break condition | |
536 | */ | |
537 | sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); | |
538 | ||
539 | #ifdef CONFIG_SERIAL_TXX9_CONSOLE | |
540 | if (up->port.cons && up->port.line == up->port.cons->index) { | |
541 | free_irq(up->port.irq, up); | |
542 | return; | |
543 | } | |
544 | #endif | |
545 | /* reset FIFOs */ | |
546 | sio_set(up, TXX9_SIFCR, | |
547 | TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); | |
548 | /* clear reset */ | |
549 | sio_mask(up, TXX9_SIFCR, | |
550 | TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); | |
551 | ||
552 | /* Disable RX/TX */ | |
553 | sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE); | |
554 | ||
555 | free_irq(up->port.irq, up); | |
556 | } | |
557 | ||
558 | static void | |
559 | serial_txx9_set_termios(struct uart_port *port, struct termios *termios, | |
560 | struct termios *old) | |
561 | { | |
562 | struct uart_txx9_port *up = (struct uart_txx9_port *)port; | |
563 | unsigned int cval, fcr = 0; | |
564 | unsigned long flags; | |
565 | unsigned int baud, quot; | |
566 | ||
567 | cval = sio_in(up, TXX9_SILCR); | |
568 | /* byte size and parity */ | |
569 | cval &= ~TXX9_SILCR_UMODE_MASK; | |
570 | switch (termios->c_cflag & CSIZE) { | |
571 | case CS7: | |
572 | cval |= TXX9_SILCR_UMODE_7BIT; | |
573 | break; | |
574 | default: | |
575 | case CS5: /* not supported */ | |
576 | case CS6: /* not supported */ | |
577 | case CS8: | |
578 | cval |= TXX9_SILCR_UMODE_8BIT; | |
579 | break; | |
580 | } | |
581 | ||
582 | cval &= ~TXX9_SILCR_USBL_MASK; | |
583 | if (termios->c_cflag & CSTOPB) | |
584 | cval |= TXX9_SILCR_USBL_2BIT; | |
585 | else | |
586 | cval |= TXX9_SILCR_USBL_1BIT; | |
587 | cval &= ~(TXX9_SILCR_UPEN | TXX9_SILCR_UEPS); | |
588 | if (termios->c_cflag & PARENB) | |
589 | cval |= TXX9_SILCR_UPEN; | |
590 | if (!(termios->c_cflag & PARODD)) | |
591 | cval |= TXX9_SILCR_UEPS; | |
592 | ||
593 | /* | |
594 | * Ask the core to calculate the divisor for us. | |
595 | */ | |
596 | baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16/2); | |
597 | quot = uart_get_divisor(port, baud); | |
598 | ||
599 | /* Set up FIFOs */ | |
600 | /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */ | |
601 | fcr = TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1; | |
602 | ||
603 | /* | |
604 | * Ok, we're now changing the port state. Do it with | |
605 | * interrupts disabled. | |
606 | */ | |
607 | spin_lock_irqsave(&up->port.lock, flags); | |
608 | ||
609 | /* | |
610 | * Update the per-port timeout. | |
611 | */ | |
612 | uart_update_timeout(port, termios->c_cflag, baud); | |
613 | ||
614 | up->port.read_status_mask = TXX9_SIDISR_UOER | | |
615 | TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS; | |
616 | if (termios->c_iflag & INPCK) | |
617 | up->port.read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER; | |
618 | if (termios->c_iflag & (BRKINT | PARMRK)) | |
619 | up->port.read_status_mask |= TXX9_SIDISR_UBRK; | |
620 | ||
621 | /* | |
622 | * Characteres to ignore | |
623 | */ | |
624 | up->port.ignore_status_mask = 0; | |
625 | if (termios->c_iflag & IGNPAR) | |
626 | up->port.ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER; | |
627 | if (termios->c_iflag & IGNBRK) { | |
628 | up->port.ignore_status_mask |= TXX9_SIDISR_UBRK; | |
629 | /* | |
630 | * If we're ignoring parity and break indicators, | |
631 | * ignore overruns too (for real raw support). | |
632 | */ | |
633 | if (termios->c_iflag & IGNPAR) | |
634 | up->port.ignore_status_mask |= TXX9_SIDISR_UOER; | |
635 | } | |
636 | ||
637 | /* | |
638 | * ignore all characters if CREAD is not set | |
639 | */ | |
640 | if ((termios->c_cflag & CREAD) == 0) | |
641 | up->port.ignore_status_mask |= TXX9_SIDISR_RDIS; | |
642 | ||
643 | /* CTS flow control flag */ | |
644 | if ((termios->c_cflag & CRTSCTS) && | |
645 | (up->port.flags & UPF_TXX9_HAVE_CTS_LINE)) { | |
646 | sio_set(up, TXX9_SIFLCR, | |
647 | TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES); | |
648 | } else { | |
649 | sio_mask(up, TXX9_SIFLCR, | |
650 | TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES); | |
651 | } | |
652 | ||
653 | sio_out(up, TXX9_SILCR, cval); | |
654 | sio_quot_set(up, quot); | |
655 | sio_out(up, TXX9_SIFCR, fcr); | |
656 | ||
657 | serial_txx9_set_mctrl(&up->port, up->port.mctrl); | |
658 | spin_unlock_irqrestore(&up->port.lock, flags); | |
659 | } | |
660 | ||
661 | static void | |
662 | serial_txx9_pm(struct uart_port *port, unsigned int state, | |
663 | unsigned int oldstate) | |
664 | { | |
665 | struct uart_txx9_port *up = (struct uart_txx9_port *)port; | |
f5ee56cc RB |
666 | if (up->pm) |
667 | up->pm(port, state, oldstate); | |
1da177e4 LT |
668 | } |
669 | ||
670 | static int serial_txx9_request_resource(struct uart_txx9_port *up) | |
671 | { | |
672 | unsigned int size = TXX9_REGION_SIZE; | |
673 | int ret = 0; | |
674 | ||
675 | switch (up->port.iotype) { | |
676 | default: | |
677 | if (!up->port.mapbase) | |
678 | break; | |
679 | ||
680 | if (!request_mem_region(up->port.mapbase, size, "serial_txx9")) { | |
681 | ret = -EBUSY; | |
682 | break; | |
683 | } | |
684 | ||
685 | if (up->port.flags & UPF_IOREMAP) { | |
686 | up->port.membase = ioremap(up->port.mapbase, size); | |
687 | if (!up->port.membase) { | |
688 | release_mem_region(up->port.mapbase, size); | |
689 | ret = -ENOMEM; | |
690 | } | |
691 | } | |
692 | break; | |
693 | ||
694 | case UPIO_PORT: | |
695 | if (!request_region(up->port.iobase, size, "serial_txx9")) | |
696 | ret = -EBUSY; | |
697 | break; | |
698 | } | |
699 | return ret; | |
700 | } | |
701 | ||
702 | static void serial_txx9_release_resource(struct uart_txx9_port *up) | |
703 | { | |
704 | unsigned int size = TXX9_REGION_SIZE; | |
705 | ||
706 | switch (up->port.iotype) { | |
707 | default: | |
708 | if (!up->port.mapbase) | |
709 | break; | |
710 | ||
711 | if (up->port.flags & UPF_IOREMAP) { | |
712 | iounmap(up->port.membase); | |
713 | up->port.membase = NULL; | |
714 | } | |
715 | ||
716 | release_mem_region(up->port.mapbase, size); | |
717 | break; | |
718 | ||
719 | case UPIO_PORT: | |
720 | release_region(up->port.iobase, size); | |
721 | break; | |
722 | } | |
723 | } | |
724 | ||
725 | static void serial_txx9_release_port(struct uart_port *port) | |
726 | { | |
727 | struct uart_txx9_port *up = (struct uart_txx9_port *)port; | |
728 | serial_txx9_release_resource(up); | |
729 | } | |
730 | ||
731 | static int serial_txx9_request_port(struct uart_port *port) | |
732 | { | |
733 | struct uart_txx9_port *up = (struct uart_txx9_port *)port; | |
734 | return serial_txx9_request_resource(up); | |
735 | } | |
736 | ||
737 | static void serial_txx9_config_port(struct uart_port *port, int uflags) | |
738 | { | |
739 | struct uart_txx9_port *up = (struct uart_txx9_port *)port; | |
740 | unsigned long flags; | |
741 | int ret; | |
742 | ||
743 | /* | |
744 | * Find the region that we can probe for. This in turn | |
745 | * tells us whether we can probe for the type of port. | |
746 | */ | |
747 | ret = serial_txx9_request_resource(up); | |
748 | if (ret < 0) | |
749 | return; | |
750 | port->type = PORT_TXX9; | |
751 | up->port.fifosize = TXX9_SIO_TX_FIFO; | |
752 | ||
753 | #ifdef CONFIG_SERIAL_TXX9_CONSOLE | |
754 | if (up->port.line == up->port.cons->index) | |
755 | return; | |
756 | #endif | |
757 | spin_lock_irqsave(&up->port.lock, flags); | |
758 | /* | |
759 | * Reset the UART. | |
760 | */ | |
761 | sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST); | |
762 | #ifdef CONFIG_CPU_TX49XX | |
763 | /* TX4925 BUG WORKAROUND. Accessing SIOC register | |
764 | * immediately after soft reset causes bus error. */ | |
765 | iob(); | |
766 | udelay(1); | |
767 | #endif | |
768 | while (sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) | |
769 | ; | |
770 | /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */ | |
771 | sio_set(up, TXX9_SIFCR, | |
772 | TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1); | |
773 | /* initial settings */ | |
774 | sio_out(up, TXX9_SILCR, | |
775 | TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT | | |
776 | ((up->port.flags & UPF_TXX9_USE_SCLK) ? | |
777 | TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG)); | |
778 | sio_quot_set(up, uart_get_divisor(port, 9600)); | |
779 | sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */); | |
780 | spin_unlock_irqrestore(&up->port.lock, flags); | |
781 | } | |
782 | ||
783 | static int | |
784 | serial_txx9_verify_port(struct uart_port *port, struct serial_struct *ser) | |
785 | { | |
83485f82 AN |
786 | unsigned long new_port = ser->port; |
787 | if (HIGH_BITS_OFFSET) | |
788 | new_port += (unsigned long)ser->port_high << HIGH_BITS_OFFSET; | |
789 | if (ser->type != port->type || | |
790 | ser->irq != port->irq || | |
791 | ser->io_type != port->iotype || | |
792 | new_port != port->iobase || | |
793 | (unsigned long)ser->iomem_base != port->mapbase) | |
1da177e4 LT |
794 | return -EINVAL; |
795 | return 0; | |
796 | } | |
797 | ||
798 | static const char * | |
799 | serial_txx9_type(struct uart_port *port) | |
800 | { | |
801 | return "txx9"; | |
802 | } | |
803 | ||
804 | static struct uart_ops serial_txx9_pops = { | |
805 | .tx_empty = serial_txx9_tx_empty, | |
806 | .set_mctrl = serial_txx9_set_mctrl, | |
807 | .get_mctrl = serial_txx9_get_mctrl, | |
808 | .stop_tx = serial_txx9_stop_tx, | |
809 | .start_tx = serial_txx9_start_tx, | |
810 | .stop_rx = serial_txx9_stop_rx, | |
811 | .enable_ms = serial_txx9_enable_ms, | |
812 | .break_ctl = serial_txx9_break_ctl, | |
813 | .startup = serial_txx9_startup, | |
814 | .shutdown = serial_txx9_shutdown, | |
815 | .set_termios = serial_txx9_set_termios, | |
816 | .pm = serial_txx9_pm, | |
817 | .type = serial_txx9_type, | |
818 | .release_port = serial_txx9_release_port, | |
819 | .request_port = serial_txx9_request_port, | |
820 | .config_port = serial_txx9_config_port, | |
821 | .verify_port = serial_txx9_verify_port, | |
822 | }; | |
823 | ||
824 | static struct uart_txx9_port serial_txx9_ports[UART_NR]; | |
825 | ||
826 | static void __init serial_txx9_register_ports(struct uart_driver *drv) | |
827 | { | |
828 | int i; | |
829 | ||
830 | for (i = 0; i < UART_NR; i++) { | |
831 | struct uart_txx9_port *up = &serial_txx9_ports[i]; | |
832 | ||
833 | up->port.line = i; | |
834 | up->port.ops = &serial_txx9_pops; | |
83485f82 AN |
835 | if (up->port.iobase || up->port.mapbase) |
836 | uart_add_one_port(drv, &up->port); | |
1da177e4 LT |
837 | } |
838 | } | |
839 | ||
840 | #ifdef CONFIG_SERIAL_TXX9_CONSOLE | |
841 | ||
842 | /* | |
843 | * Wait for transmitter & holding register to empty | |
844 | */ | |
845 | static inline void wait_for_xmitr(struct uart_txx9_port *up) | |
846 | { | |
847 | unsigned int tmout = 10000; | |
848 | ||
849 | /* Wait up to 10ms for the character(s) to be sent. */ | |
850 | while (--tmout && | |
851 | !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS)) | |
852 | udelay(1); | |
853 | ||
854 | /* Wait up to 1s for flow control if necessary */ | |
855 | if (up->port.flags & UPF_CONS_FLOW) { | |
856 | tmout = 1000000; | |
857 | while (--tmout && | |
858 | (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS)) | |
859 | udelay(1); | |
860 | } | |
861 | } | |
862 | ||
d358788f RK |
863 | static void serial_txx9_console_putchar(struct uart_port *port, int ch) |
864 | { | |
865 | struct uart_txx9_port *up = (struct uart_txx9_port *)port; | |
866 | ||
867 | wait_for_xmitr(up); | |
868 | sio_out(up, TXX9_SITFIFO, ch); | |
869 | } | |
870 | ||
1da177e4 LT |
871 | /* |
872 | * Print a string to the serial port trying not to disturb | |
873 | * any possible real use of the port... | |
874 | * | |
875 | * The console_lock must be held when we get here. | |
876 | */ | |
877 | static void | |
878 | serial_txx9_console_write(struct console *co, const char *s, unsigned int count) | |
879 | { | |
880 | struct uart_txx9_port *up = &serial_txx9_ports[co->index]; | |
881 | unsigned int ier, flcr; | |
1da177e4 LT |
882 | |
883 | /* | |
884 | * First save the UER then disable the interrupts | |
885 | */ | |
886 | ier = sio_in(up, TXX9_SIDICR); | |
887 | sio_out(up, TXX9_SIDICR, 0); | |
888 | /* | |
889 | * Disable flow-control if enabled (and unnecessary) | |
890 | */ | |
891 | flcr = sio_in(up, TXX9_SIFLCR); | |
892 | if (!(up->port.flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES)) | |
893 | sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES); | |
894 | ||
d358788f | 895 | uart_console_write(&up->port, s, count, serial_txx9_console_putchar); |
1da177e4 LT |
896 | |
897 | /* | |
898 | * Finally, wait for transmitter to become empty | |
899 | * and restore the IER | |
900 | */ | |
901 | wait_for_xmitr(up); | |
902 | sio_out(up, TXX9_SIFLCR, flcr); | |
903 | sio_out(up, TXX9_SIDICR, ier); | |
904 | } | |
905 | ||
906 | static int serial_txx9_console_setup(struct console *co, char *options) | |
907 | { | |
908 | struct uart_port *port; | |
909 | struct uart_txx9_port *up; | |
910 | int baud = 9600; | |
911 | int bits = 8; | |
912 | int parity = 'n'; | |
913 | int flow = 'n'; | |
914 | ||
915 | /* | |
916 | * Check whether an invalid uart number has been specified, and | |
917 | * if so, search for the first available port that does have | |
918 | * console support. | |
919 | */ | |
920 | if (co->index >= UART_NR) | |
921 | co->index = 0; | |
922 | up = &serial_txx9_ports[co->index]; | |
923 | port = &up->port; | |
924 | if (!port->ops) | |
925 | return -ENODEV; | |
926 | ||
1da177e4 LT |
927 | /* |
928 | * Disable UART interrupts, set DTR and RTS high | |
929 | * and set speed. | |
930 | */ | |
931 | sio_out(up, TXX9_SIDICR, 0); | |
932 | /* initial settings */ | |
933 | sio_out(up, TXX9_SILCR, | |
934 | TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT | | |
935 | ((port->flags & UPF_TXX9_USE_SCLK) ? | |
936 | TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG)); | |
937 | sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */); | |
938 | ||
939 | if (options) | |
940 | uart_parse_options(options, &baud, &parity, &bits, &flow); | |
941 | ||
942 | return uart_set_options(port, co, baud, parity, bits, flow); | |
943 | } | |
944 | ||
945 | static struct uart_driver serial_txx9_reg; | |
946 | static struct console serial_txx9_console = { | |
947 | .name = TXX9_TTY_NAME, | |
948 | .write = serial_txx9_console_write, | |
949 | .device = uart_console_device, | |
950 | .setup = serial_txx9_console_setup, | |
951 | .flags = CON_PRINTBUFFER, | |
952 | .index = -1, | |
953 | .data = &serial_txx9_reg, | |
954 | }; | |
955 | ||
956 | static int __init serial_txx9_console_init(void) | |
957 | { | |
958 | register_console(&serial_txx9_console); | |
959 | return 0; | |
960 | } | |
961 | console_initcall(serial_txx9_console_init); | |
962 | ||
1da177e4 LT |
963 | #define SERIAL_TXX9_CONSOLE &serial_txx9_console |
964 | #else | |
965 | #define SERIAL_TXX9_CONSOLE NULL | |
966 | #endif | |
967 | ||
968 | static struct uart_driver serial_txx9_reg = { | |
969 | .owner = THIS_MODULE, | |
970 | .driver_name = "serial_txx9", | |
1da177e4 LT |
971 | .dev_name = TXX9_TTY_NAME, |
972 | .major = TXX9_TTY_MAJOR, | |
973 | .minor = TXX9_TTY_MINOR_START, | |
974 | .nr = UART_NR, | |
975 | .cons = SERIAL_TXX9_CONSOLE, | |
976 | }; | |
977 | ||
978 | int __init early_serial_txx9_setup(struct uart_port *port) | |
979 | { | |
980 | if (port->line >= ARRAY_SIZE(serial_txx9_ports)) | |
981 | return -ENODEV; | |
982 | ||
983 | serial_txx9_ports[port->line].port = *port; | |
984 | serial_txx9_ports[port->line].port.ops = &serial_txx9_pops; | |
985 | serial_txx9_ports[port->line].port.flags |= UPF_BOOT_AUTOCONF; | |
986 | return 0; | |
987 | } | |
988 | ||
989 | #ifdef ENABLE_SERIAL_TXX9_PCI | |
990 | /** | |
991 | * serial_txx9_suspend_port - suspend one serial port | |
992 | * @line: serial line number | |
993 | * @level: the level of port suspension, as per uart_suspend_port | |
994 | * | |
995 | * Suspend one serial port. | |
996 | */ | |
997 | static void serial_txx9_suspend_port(int line) | |
998 | { | |
999 | uart_suspend_port(&serial_txx9_reg, &serial_txx9_ports[line].port); | |
1000 | } | |
1001 | ||
1002 | /** | |
1003 | * serial_txx9_resume_port - resume one serial port | |
1004 | * @line: serial line number | |
1005 | * @level: the level of port resumption, as per uart_resume_port | |
1006 | * | |
1007 | * Resume one serial port. | |
1008 | */ | |
1009 | static void serial_txx9_resume_port(int line) | |
1010 | { | |
1011 | uart_resume_port(&serial_txx9_reg, &serial_txx9_ports[line].port); | |
1012 | } | |
1013 | ||
f392ecfa | 1014 | static DEFINE_MUTEX(serial_txx9_mutex); |
f5ee56cc RB |
1015 | |
1016 | /** | |
1017 | * serial_txx9_register_port - register a serial port | |
1018 | * @port: serial port template | |
1019 | * | |
1020 | * Configure the serial port specified by the request. | |
1021 | * | |
1022 | * The port is then probed and if necessary the IRQ is autodetected | |
1023 | * If this fails an error is returned. | |
1024 | * | |
1025 | * On success the port is ready to use and the line number is returned. | |
1026 | */ | |
1027 | static int __devinit serial_txx9_register_port(struct uart_port *port) | |
1028 | { | |
1029 | int i; | |
1030 | struct uart_txx9_port *uart; | |
1031 | int ret = -ENOSPC; | |
1032 | ||
f392ecfa | 1033 | mutex_lock(&serial_txx9_mutex); |
f5ee56cc RB |
1034 | for (i = 0; i < UART_NR; i++) { |
1035 | uart = &serial_txx9_ports[i]; | |
83485f82 | 1036 | if (!(uart->port.iobase || uart->port.mapbase)) |
f5ee56cc RB |
1037 | break; |
1038 | } | |
1039 | if (i < UART_NR) { | |
f5ee56cc RB |
1040 | uart->port.iobase = port->iobase; |
1041 | uart->port.membase = port->membase; | |
1042 | uart->port.irq = port->irq; | |
1043 | uart->port.uartclk = port->uartclk; | |
1044 | uart->port.iotype = port->iotype; | |
1045 | uart->port.flags = port->flags | UPF_BOOT_AUTOCONF; | |
1046 | uart->port.mapbase = port->mapbase; | |
1047 | if (port->dev) | |
1048 | uart->port.dev = port->dev; | |
1049 | ret = uart_add_one_port(&serial_txx9_reg, &uart->port); | |
1050 | if (ret == 0) | |
1051 | ret = uart->port.line; | |
1052 | } | |
f392ecfa | 1053 | mutex_unlock(&serial_txx9_mutex); |
f5ee56cc RB |
1054 | return ret; |
1055 | } | |
1056 | ||
1057 | /** | |
1058 | * serial_txx9_unregister_port - remove a txx9 serial port at runtime | |
1059 | * @line: serial line number | |
1060 | * | |
1061 | * Remove one serial port. This may not be called from interrupt | |
1062 | * context. We hand the port back to the our control. | |
1063 | */ | |
1064 | static void __devexit serial_txx9_unregister_port(int line) | |
1065 | { | |
1066 | struct uart_txx9_port *uart = &serial_txx9_ports[line]; | |
1067 | ||
f392ecfa | 1068 | mutex_lock(&serial_txx9_mutex); |
f5ee56cc RB |
1069 | uart_remove_one_port(&serial_txx9_reg, &uart->port); |
1070 | uart->port.flags = 0; | |
1071 | uart->port.type = PORT_UNKNOWN; | |
1072 | uart->port.iobase = 0; | |
1073 | uart->port.mapbase = 0; | |
83485f82 | 1074 | uart->port.membase = NULL; |
f5ee56cc | 1075 | uart->port.dev = NULL; |
f392ecfa | 1076 | mutex_unlock(&serial_txx9_mutex); |
f5ee56cc RB |
1077 | } |
1078 | ||
1da177e4 LT |
1079 | /* |
1080 | * Probe one serial board. Unfortunately, there is no rhyme nor reason | |
1081 | * to the arrangement of serial ports on a PCI card. | |
1082 | */ | |
1083 | static int __devinit | |
1084 | pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent) | |
1085 | { | |
1086 | struct uart_port port; | |
1087 | int line; | |
1088 | int rc; | |
1089 | ||
1090 | rc = pci_enable_device(dev); | |
1091 | if (rc) | |
1092 | return rc; | |
1093 | ||
1094 | memset(&port, 0, sizeof(port)); | |
1095 | port.ops = &serial_txx9_pops; | |
1da177e4 LT |
1096 | port.flags |= UPF_TXX9_HAVE_CTS_LINE; |
1097 | port.uartclk = 66670000; | |
1098 | port.irq = dev->irq; | |
1099 | port.iotype = UPIO_PORT; | |
1100 | port.iobase = pci_resource_start(dev, 1); | |
f5ee56cc RB |
1101 | port.dev = &dev->dev; |
1102 | line = serial_txx9_register_port(&port); | |
1da177e4 LT |
1103 | if (line < 0) { |
1104 | printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line); | |
1105 | } | |
1106 | pci_set_drvdata(dev, (void *)(long)line); | |
1107 | ||
1108 | return 0; | |
1109 | } | |
1110 | ||
1111 | static void __devexit pciserial_txx9_remove_one(struct pci_dev *dev) | |
1112 | { | |
1113 | int line = (int)(long)pci_get_drvdata(dev); | |
1114 | ||
1115 | pci_set_drvdata(dev, NULL); | |
1116 | ||
1117 | if (line) { | |
f5ee56cc | 1118 | serial_txx9_unregister_port(line); |
1da177e4 LT |
1119 | pci_disable_device(dev); |
1120 | } | |
1121 | } | |
1122 | ||
0370affe | 1123 | static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state) |
1da177e4 LT |
1124 | { |
1125 | int line = (int)(long)pci_get_drvdata(dev); | |
1126 | ||
1127 | if (line) | |
1128 | serial_txx9_suspend_port(line); | |
f5ee56cc RB |
1129 | pci_save_state(dev); |
1130 | pci_set_power_state(dev, pci_choose_state(dev, state)); | |
1da177e4 LT |
1131 | return 0; |
1132 | } | |
1133 | ||
1134 | static int pciserial_txx9_resume_one(struct pci_dev *dev) | |
1135 | { | |
1136 | int line = (int)(long)pci_get_drvdata(dev); | |
1137 | ||
f5ee56cc RB |
1138 | pci_set_power_state(dev, PCI_D0); |
1139 | pci_restore_state(dev); | |
1140 | ||
1141 | if (line) { | |
1142 | pci_enable_device(dev); | |
1da177e4 | 1143 | serial_txx9_resume_port(line); |
f5ee56cc | 1144 | } |
1da177e4 LT |
1145 | return 0; |
1146 | } | |
1147 | ||
1148 | static struct pci_device_id serial_txx9_pci_tbl[] = { | |
1149 | { PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC, | |
1150 | PCI_ANY_ID, PCI_ANY_ID, | |
1151 | 0, 0, 0 }, | |
1152 | { 0, } | |
1153 | }; | |
1154 | ||
1155 | static struct pci_driver serial_txx9_pci_driver = { | |
1156 | .name = "serial_txx9", | |
1157 | .probe = pciserial_txx9_init_one, | |
1158 | .remove = __devexit_p(pciserial_txx9_remove_one), | |
1159 | .suspend = pciserial_txx9_suspend_one, | |
1160 | .resume = pciserial_txx9_resume_one, | |
1161 | .id_table = serial_txx9_pci_tbl, | |
1162 | }; | |
1163 | ||
1164 | MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl); | |
1165 | #endif /* ENABLE_SERIAL_TXX9_PCI */ | |
1166 | ||
1167 | static int __init serial_txx9_init(void) | |
1168 | { | |
1169 | int ret; | |
1170 | ||
1171 | printk(KERN_INFO "%s version %s\n", serial_name, serial_version); | |
1172 | ||
1173 | ret = uart_register_driver(&serial_txx9_reg); | |
1174 | if (ret >= 0) { | |
1175 | serial_txx9_register_ports(&serial_txx9_reg); | |
1176 | ||
1177 | #ifdef ENABLE_SERIAL_TXX9_PCI | |
93b47684 | 1178 | ret = pci_register_driver(&serial_txx9_pci_driver); |
1da177e4 LT |
1179 | #endif |
1180 | } | |
1181 | return ret; | |
1182 | } | |
1183 | ||
1184 | static void __exit serial_txx9_exit(void) | |
1185 | { | |
1186 | int i; | |
1187 | ||
1188 | #ifdef ENABLE_SERIAL_TXX9_PCI | |
1189 | pci_unregister_driver(&serial_txx9_pci_driver); | |
1190 | #endif | |
83485f82 AN |
1191 | for (i = 0; i < UART_NR; i++) { |
1192 | struct uart_txx9_port *up = &serial_txx9_ports[i]; | |
1193 | if (up->port.iobase || up->port.mapbase) | |
1194 | uart_remove_one_port(&serial_txx9_reg, &up->port); | |
1195 | } | |
1da177e4 LT |
1196 | |
1197 | uart_unregister_driver(&serial_txx9_reg); | |
1198 | } | |
1199 | ||
1200 | module_init(serial_txx9_init); | |
1201 | module_exit(serial_txx9_exit); | |
1202 | ||
1203 | MODULE_LICENSE("GPL"); | |
1204 | MODULE_DESCRIPTION("TX39/49 serial driver"); | |
1205 | ||
1206 | MODULE_ALIAS_CHARDEV_MAJOR(TXX9_TTY_MAJOR); |