Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Derived from many drivers using generic_serial interface, |
3 | * especially serial_tx3912.c by Steven J. Hill and r39xx_serial.c | |
4 | * (was in Linux/VR tree) by Jim Pick. | |
5 | * | |
6 | * Copyright (C) 1999 Harald Koerfgen | |
7 | * Copyright (C) 2000 Jim Pick <jim@jimpick.com> | |
8 | * Copyright (C) 2001 Steven J. Hill (sjhill@realitydiluted.com) | |
9 | * Copyright (C) 2000-2002 Toshiba Corporation | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License version 2 as | |
13 | * published by the Free Software Foundation. | |
14 | * | |
15 | * Serial driver for TX3927/TX4927/TX4925/TX4938 internal SIO controller | |
1da177e4 | 16 | */ |
1da177e4 LT |
17 | |
18 | #if defined(CONFIG_SERIAL_TXX9_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) | |
19 | #define SUPPORT_SYSRQ | |
20 | #endif | |
21 | ||
22 | #include <linux/module.h> | |
23 | #include <linux/ioport.h> | |
24 | #include <linux/init.h> | |
25 | #include <linux/console.h> | |
1da177e4 | 26 | #include <linux/delay.h> |
0970769a | 27 | #include <linux/platform_device.h> |
1da177e4 | 28 | #include <linux/pci.h> |
1da177e4 LT |
29 | #include <linux/serial_core.h> |
30 | #include <linux/serial.h> | |
ee160a38 JS |
31 | #include <linux/tty.h> |
32 | #include <linux/tty_flip.h> | |
1da177e4 LT |
33 | |
34 | #include <asm/io.h> | |
1da177e4 | 35 | |
37a6c7d0 | 36 | static char *serial_version = "1.11"; |
1da177e4 LT |
37 | static char *serial_name = "TX39/49 Serial driver"; |
38 | ||
39 | #define PASS_LIMIT 256 | |
40 | ||
41 | #if !defined(CONFIG_SERIAL_TXX9_STDSERIAL) | |
42 | /* "ttyS" is used for standard serial driver */ | |
43 | #define TXX9_TTY_NAME "ttyTX" | |
07bafde3 AN |
44 | #define TXX9_TTY_MINOR_START 196 |
45 | #define TXX9_TTY_MAJOR 204 | |
1da177e4 LT |
46 | #else |
47 | /* acts like standard serial driver */ | |
48 | #define TXX9_TTY_NAME "ttyS" | |
1da177e4 | 49 | #define TXX9_TTY_MINOR_START 64 |
1da177e4 | 50 | #define TXX9_TTY_MAJOR TTY_MAJOR |
07bafde3 | 51 | #endif |
1da177e4 LT |
52 | |
53 | /* flag aliases */ | |
54 | #define UPF_TXX9_HAVE_CTS_LINE UPF_BUGGY_UART | |
55 | #define UPF_TXX9_USE_SCLK UPF_MAGIC_MULTIPLIER | |
56 | ||
57 | #ifdef CONFIG_PCI | |
58 | /* support for Toshiba TC86C001 SIO */ | |
59 | #define ENABLE_SERIAL_TXX9_PCI | |
60 | #endif | |
61 | ||
62 | /* | |
63 | * Number of serial ports | |
64 | */ | |
138c5d25 | 65 | #define UART_NR CONFIG_SERIAL_TXX9_NR_UARTS |
1da177e4 LT |
66 | |
67 | struct uart_txx9_port { | |
68 | struct uart_port port; | |
0970769a | 69 | /* No additional info for now */ |
1da177e4 LT |
70 | }; |
71 | ||
72 | #define TXX9_REGION_SIZE 0x24 | |
73 | ||
74 | /* TXX9 Serial Registers */ | |
75 | #define TXX9_SILCR 0x00 | |
76 | #define TXX9_SIDICR 0x04 | |
77 | #define TXX9_SIDISR 0x08 | |
78 | #define TXX9_SICISR 0x0c | |
79 | #define TXX9_SIFCR 0x10 | |
80 | #define TXX9_SIFLCR 0x14 | |
81 | #define TXX9_SIBGR 0x18 | |
82 | #define TXX9_SITFIFO 0x1c | |
83 | #define TXX9_SIRFIFO 0x20 | |
84 | ||
85 | /* SILCR : Line Control */ | |
86 | #define TXX9_SILCR_SCS_MASK 0x00000060 | |
87 | #define TXX9_SILCR_SCS_IMCLK 0x00000000 | |
88 | #define TXX9_SILCR_SCS_IMCLK_BG 0x00000020 | |
89 | #define TXX9_SILCR_SCS_SCLK 0x00000040 | |
90 | #define TXX9_SILCR_SCS_SCLK_BG 0x00000060 | |
91 | #define TXX9_SILCR_UEPS 0x00000010 | |
92 | #define TXX9_SILCR_UPEN 0x00000008 | |
93 | #define TXX9_SILCR_USBL_MASK 0x00000004 | |
94 | #define TXX9_SILCR_USBL_1BIT 0x00000000 | |
95 | #define TXX9_SILCR_USBL_2BIT 0x00000004 | |
96 | #define TXX9_SILCR_UMODE_MASK 0x00000003 | |
97 | #define TXX9_SILCR_UMODE_8BIT 0x00000000 | |
98 | #define TXX9_SILCR_UMODE_7BIT 0x00000001 | |
99 | ||
100 | /* SIDICR : DMA/Int. Control */ | |
101 | #define TXX9_SIDICR_TDE 0x00008000 | |
102 | #define TXX9_SIDICR_RDE 0x00004000 | |
103 | #define TXX9_SIDICR_TIE 0x00002000 | |
104 | #define TXX9_SIDICR_RIE 0x00001000 | |
105 | #define TXX9_SIDICR_SPIE 0x00000800 | |
106 | #define TXX9_SIDICR_CTSAC 0x00000600 | |
107 | #define TXX9_SIDICR_STIE_MASK 0x0000003f | |
108 | #define TXX9_SIDICR_STIE_OERS 0x00000020 | |
109 | #define TXX9_SIDICR_STIE_CTSS 0x00000010 | |
110 | #define TXX9_SIDICR_STIE_RBRKD 0x00000008 | |
111 | #define TXX9_SIDICR_STIE_TRDY 0x00000004 | |
112 | #define TXX9_SIDICR_STIE_TXALS 0x00000002 | |
113 | #define TXX9_SIDICR_STIE_UBRKD 0x00000001 | |
114 | ||
115 | /* SIDISR : DMA/Int. Status */ | |
116 | #define TXX9_SIDISR_UBRK 0x00008000 | |
117 | #define TXX9_SIDISR_UVALID 0x00004000 | |
118 | #define TXX9_SIDISR_UFER 0x00002000 | |
119 | #define TXX9_SIDISR_UPER 0x00001000 | |
120 | #define TXX9_SIDISR_UOER 0x00000800 | |
121 | #define TXX9_SIDISR_ERI 0x00000400 | |
122 | #define TXX9_SIDISR_TOUT 0x00000200 | |
123 | #define TXX9_SIDISR_TDIS 0x00000100 | |
124 | #define TXX9_SIDISR_RDIS 0x00000080 | |
125 | #define TXX9_SIDISR_STIS 0x00000040 | |
126 | #define TXX9_SIDISR_RFDN_MASK 0x0000001f | |
127 | ||
128 | /* SICISR : Change Int. Status */ | |
129 | #define TXX9_SICISR_OERS 0x00000020 | |
130 | #define TXX9_SICISR_CTSS 0x00000010 | |
131 | #define TXX9_SICISR_RBRKD 0x00000008 | |
132 | #define TXX9_SICISR_TRDY 0x00000004 | |
133 | #define TXX9_SICISR_TXALS 0x00000002 | |
134 | #define TXX9_SICISR_UBRKD 0x00000001 | |
135 | ||
136 | /* SIFCR : FIFO Control */ | |
137 | #define TXX9_SIFCR_SWRST 0x00008000 | |
138 | #define TXX9_SIFCR_RDIL_MASK 0x00000180 | |
139 | #define TXX9_SIFCR_RDIL_1 0x00000000 | |
140 | #define TXX9_SIFCR_RDIL_4 0x00000080 | |
141 | #define TXX9_SIFCR_RDIL_8 0x00000100 | |
142 | #define TXX9_SIFCR_RDIL_12 0x00000180 | |
143 | #define TXX9_SIFCR_RDIL_MAX 0x00000180 | |
144 | #define TXX9_SIFCR_TDIL_MASK 0x00000018 | |
145 | #define TXX9_SIFCR_TDIL_MASK 0x00000018 | |
146 | #define TXX9_SIFCR_TDIL_1 0x00000000 | |
147 | #define TXX9_SIFCR_TDIL_4 0x00000001 | |
148 | #define TXX9_SIFCR_TDIL_8 0x00000010 | |
149 | #define TXX9_SIFCR_TDIL_MAX 0x00000010 | |
150 | #define TXX9_SIFCR_TFRST 0x00000004 | |
151 | #define TXX9_SIFCR_RFRST 0x00000002 | |
152 | #define TXX9_SIFCR_FRSTE 0x00000001 | |
153 | #define TXX9_SIO_TX_FIFO 8 | |
154 | #define TXX9_SIO_RX_FIFO 16 | |
155 | ||
156 | /* SIFLCR : Flow Control */ | |
157 | #define TXX9_SIFLCR_RCS 0x00001000 | |
158 | #define TXX9_SIFLCR_TES 0x00000800 | |
159 | #define TXX9_SIFLCR_RTSSC 0x00000200 | |
160 | #define TXX9_SIFLCR_RSDE 0x00000100 | |
161 | #define TXX9_SIFLCR_TSDE 0x00000080 | |
162 | #define TXX9_SIFLCR_RTSTL_MASK 0x0000001e | |
163 | #define TXX9_SIFLCR_RTSTL_MAX 0x0000001e | |
164 | #define TXX9_SIFLCR_TBRK 0x00000001 | |
165 | ||
166 | /* SIBGR : Baudrate Control */ | |
167 | #define TXX9_SIBGR_BCLK_MASK 0x00000300 | |
168 | #define TXX9_SIBGR_BCLK_T0 0x00000000 | |
169 | #define TXX9_SIBGR_BCLK_T2 0x00000100 | |
170 | #define TXX9_SIBGR_BCLK_T4 0x00000200 | |
171 | #define TXX9_SIBGR_BCLK_T6 0x00000300 | |
172 | #define TXX9_SIBGR_BRD_MASK 0x000000ff | |
173 | ||
174 | static inline unsigned int sio_in(struct uart_txx9_port *up, int offset) | |
175 | { | |
176 | switch (up->port.iotype) { | |
177 | default: | |
83485f82 | 178 | return __raw_readl(up->port.membase + offset); |
1da177e4 LT |
179 | case UPIO_PORT: |
180 | return inl(up->port.iobase + offset); | |
181 | } | |
182 | } | |
183 | ||
184 | static inline void | |
185 | sio_out(struct uart_txx9_port *up, int offset, int value) | |
186 | { | |
187 | switch (up->port.iotype) { | |
188 | default: | |
83485f82 | 189 | __raw_writel(value, up->port.membase + offset); |
1da177e4 LT |
190 | break; |
191 | case UPIO_PORT: | |
192 | outl(value, up->port.iobase + offset); | |
193 | break; | |
194 | } | |
195 | } | |
196 | ||
197 | static inline void | |
198 | sio_mask(struct uart_txx9_port *up, int offset, unsigned int value) | |
199 | { | |
200 | sio_out(up, offset, sio_in(up, offset) & ~value); | |
201 | } | |
202 | static inline void | |
203 | sio_set(struct uart_txx9_port *up, int offset, unsigned int value) | |
204 | { | |
205 | sio_out(up, offset, sio_in(up, offset) | value); | |
206 | } | |
207 | ||
208 | static inline void | |
209 | sio_quot_set(struct uart_txx9_port *up, int quot) | |
210 | { | |
211 | quot >>= 1; | |
212 | if (quot < 256) | |
213 | sio_out(up, TXX9_SIBGR, quot | TXX9_SIBGR_BCLK_T0); | |
214 | else if (quot < (256 << 2)) | |
215 | sio_out(up, TXX9_SIBGR, (quot >> 2) | TXX9_SIBGR_BCLK_T2); | |
216 | else if (quot < (256 << 4)) | |
217 | sio_out(up, TXX9_SIBGR, (quot >> 4) | TXX9_SIBGR_BCLK_T4); | |
218 | else if (quot < (256 << 6)) | |
219 | sio_out(up, TXX9_SIBGR, (quot >> 6) | TXX9_SIBGR_BCLK_T6); | |
220 | else | |
221 | sio_out(up, TXX9_SIBGR, 0xff | TXX9_SIBGR_BCLK_T6); | |
222 | } | |
223 | ||
aa76224a AN |
224 | static struct uart_txx9_port *to_uart_txx9_port(struct uart_port *port) |
225 | { | |
226 | return container_of(port, struct uart_txx9_port, port); | |
227 | } | |
228 | ||
b129a8cc | 229 | static void serial_txx9_stop_tx(struct uart_port *port) |
1da177e4 | 230 | { |
aa76224a | 231 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
1da177e4 | 232 | sio_mask(up, TXX9_SIDICR, TXX9_SIDICR_TIE); |
1da177e4 LT |
233 | } |
234 | ||
b129a8cc | 235 | static void serial_txx9_start_tx(struct uart_port *port) |
1da177e4 | 236 | { |
aa76224a | 237 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
1da177e4 | 238 | sio_set(up, TXX9_SIDICR, TXX9_SIDICR_TIE); |
1da177e4 LT |
239 | } |
240 | ||
241 | static void serial_txx9_stop_rx(struct uart_port *port) | |
242 | { | |
aa76224a | 243 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
1da177e4 | 244 | up->port.read_status_mask &= ~TXX9_SIDISR_RDIS; |
1da177e4 LT |
245 | } |
246 | ||
247 | static void serial_txx9_enable_ms(struct uart_port *port) | |
248 | { | |
249 | /* TXX9-SIO can not control DTR... */ | |
250 | } | |
251 | ||
0970769a AN |
252 | static void serial_txx9_initialize(struct uart_port *port) |
253 | { | |
aa76224a | 254 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
0970769a AN |
255 | unsigned int tmout = 10000; |
256 | ||
257 | sio_out(up, TXX9_SIFCR, TXX9_SIFCR_SWRST); | |
258 | /* TX4925 BUG WORKAROUND. Accessing SIOC register | |
259 | * immediately after soft reset causes bus error. */ | |
260 | mmiowb(); | |
261 | udelay(1); | |
262 | while ((sio_in(up, TXX9_SIFCR) & TXX9_SIFCR_SWRST) && --tmout) | |
263 | udelay(1); | |
264 | /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */ | |
265 | sio_set(up, TXX9_SIFCR, | |
266 | TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1); | |
267 | /* initial settings */ | |
268 | sio_out(up, TXX9_SILCR, | |
269 | TXX9_SILCR_UMODE_8BIT | TXX9_SILCR_USBL_1BIT | | |
270 | ((up->port.flags & UPF_TXX9_USE_SCLK) ? | |
271 | TXX9_SILCR_SCS_SCLK_BG : TXX9_SILCR_SCS_IMCLK_BG)); | |
272 | sio_quot_set(up, uart_get_divisor(port, 9600)); | |
273 | sio_out(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSTL_MAX /* 15 */); | |
274 | sio_out(up, TXX9_SIDICR, 0); | |
275 | } | |
276 | ||
1da177e4 | 277 | static inline void |
7d12e780 | 278 | receive_chars(struct uart_txx9_port *up, unsigned int *status) |
1da177e4 | 279 | { |
ebd2c8f6 | 280 | struct tty_struct *tty = up->port.state->port.tty; |
1da177e4 LT |
281 | unsigned char ch; |
282 | unsigned int disr = *status; | |
283 | int max_count = 256; | |
284 | char flag; | |
83485f82 | 285 | unsigned int next_ignore_status_mask; |
1da177e4 LT |
286 | |
287 | do { | |
1da177e4 LT |
288 | ch = sio_in(up, TXX9_SIRFIFO); |
289 | flag = TTY_NORMAL; | |
290 | up->port.icount.rx++; | |
291 | ||
83485f82 AN |
292 | /* mask out RFDN_MASK bit added by previous overrun */ |
293 | next_ignore_status_mask = | |
294 | up->port.ignore_status_mask & ~TXX9_SIDISR_RFDN_MASK; | |
1da177e4 LT |
295 | if (unlikely(disr & (TXX9_SIDISR_UBRK | TXX9_SIDISR_UPER | |
296 | TXX9_SIDISR_UFER | TXX9_SIDISR_UOER))) { | |
297 | /* | |
298 | * For statistics only | |
299 | */ | |
300 | if (disr & TXX9_SIDISR_UBRK) { | |
301 | disr &= ~(TXX9_SIDISR_UFER | TXX9_SIDISR_UPER); | |
302 | up->port.icount.brk++; | |
303 | /* | |
304 | * We do the SysRQ and SAK checking | |
305 | * here because otherwise the break | |
306 | * may get masked by ignore_status_mask | |
307 | * or read_status_mask. | |
308 | */ | |
309 | if (uart_handle_break(&up->port)) | |
310 | goto ignore_char; | |
311 | } else if (disr & TXX9_SIDISR_UPER) | |
312 | up->port.icount.parity++; | |
313 | else if (disr & TXX9_SIDISR_UFER) | |
314 | up->port.icount.frame++; | |
83485f82 | 315 | if (disr & TXX9_SIDISR_UOER) { |
1da177e4 | 316 | up->port.icount.overrun++; |
83485f82 AN |
317 | /* |
318 | * The receiver read buffer still hold | |
319 | * a char which caused overrun. | |
320 | * Ignore next char by adding RFDN_MASK | |
321 | * to ignore_status_mask temporarily. | |
322 | */ | |
323 | next_ignore_status_mask |= | |
324 | TXX9_SIDISR_RFDN_MASK; | |
325 | } | |
1da177e4 LT |
326 | |
327 | /* | |
328 | * Mask off conditions which should be ingored. | |
329 | */ | |
330 | disr &= up->port.read_status_mask; | |
331 | ||
332 | if (disr & TXX9_SIDISR_UBRK) { | |
333 | flag = TTY_BREAK; | |
334 | } else if (disr & TXX9_SIDISR_UPER) | |
335 | flag = TTY_PARITY; | |
336 | else if (disr & TXX9_SIDISR_UFER) | |
337 | flag = TTY_FRAME; | |
338 | } | |
7d12e780 | 339 | if (uart_handle_sysrq_char(&up->port, ch)) |
1da177e4 | 340 | goto ignore_char; |
05ab3014 RK |
341 | |
342 | uart_insert_char(&up->port, disr, TXX9_SIDISR_UOER, ch, flag); | |
343 | ||
1da177e4 | 344 | ignore_char: |
83485f82 | 345 | up->port.ignore_status_mask = next_ignore_status_mask; |
1da177e4 LT |
346 | disr = sio_in(up, TXX9_SIDISR); |
347 | } while (!(disr & TXX9_SIDISR_UVALID) && (max_count-- > 0)); | |
f5ee56cc | 348 | spin_unlock(&up->port.lock); |
1da177e4 | 349 | tty_flip_buffer_push(tty); |
f5ee56cc | 350 | spin_lock(&up->port.lock); |
1da177e4 LT |
351 | *status = disr; |
352 | } | |
353 | ||
354 | static inline void transmit_chars(struct uart_txx9_port *up) | |
355 | { | |
ebd2c8f6 | 356 | struct circ_buf *xmit = &up->port.state->xmit; |
1da177e4 LT |
357 | int count; |
358 | ||
359 | if (up->port.x_char) { | |
360 | sio_out(up, TXX9_SITFIFO, up->port.x_char); | |
361 | up->port.icount.tx++; | |
362 | up->port.x_char = 0; | |
363 | return; | |
364 | } | |
365 | if (uart_circ_empty(xmit) || uart_tx_stopped(&up->port)) { | |
b129a8cc | 366 | serial_txx9_stop_tx(&up->port); |
1da177e4 LT |
367 | return; |
368 | } | |
369 | ||
370 | count = TXX9_SIO_TX_FIFO; | |
371 | do { | |
372 | sio_out(up, TXX9_SITFIFO, xmit->buf[xmit->tail]); | |
373 | xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); | |
374 | up->port.icount.tx++; | |
375 | if (uart_circ_empty(xmit)) | |
376 | break; | |
377 | } while (--count > 0); | |
378 | ||
379 | if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) | |
380 | uart_write_wakeup(&up->port); | |
381 | ||
382 | if (uart_circ_empty(xmit)) | |
b129a8cc | 383 | serial_txx9_stop_tx(&up->port); |
1da177e4 LT |
384 | } |
385 | ||
7d12e780 | 386 | static irqreturn_t serial_txx9_interrupt(int irq, void *dev_id) |
1da177e4 LT |
387 | { |
388 | int pass_counter = 0; | |
389 | struct uart_txx9_port *up = dev_id; | |
390 | unsigned int status; | |
391 | ||
392 | while (1) { | |
393 | spin_lock(&up->port.lock); | |
394 | status = sio_in(up, TXX9_SIDISR); | |
395 | if (!(sio_in(up, TXX9_SIDICR) & TXX9_SIDICR_TIE)) | |
396 | status &= ~TXX9_SIDISR_TDIS; | |
397 | if (!(status & (TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS | | |
398 | TXX9_SIDISR_TOUT))) { | |
399 | spin_unlock(&up->port.lock); | |
400 | break; | |
401 | } | |
402 | ||
403 | if (status & TXX9_SIDISR_RDIS) | |
7d12e780 | 404 | receive_chars(up, &status); |
1da177e4 LT |
405 | if (status & TXX9_SIDISR_TDIS) |
406 | transmit_chars(up); | |
407 | /* Clear TX/RX Int. Status */ | |
408 | sio_mask(up, TXX9_SIDISR, | |
409 | TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS | | |
410 | TXX9_SIDISR_TOUT); | |
411 | spin_unlock(&up->port.lock); | |
412 | ||
413 | if (pass_counter++ > PASS_LIMIT) | |
414 | break; | |
415 | } | |
416 | ||
417 | return pass_counter ? IRQ_HANDLED : IRQ_NONE; | |
418 | } | |
419 | ||
420 | static unsigned int serial_txx9_tx_empty(struct uart_port *port) | |
421 | { | |
aa76224a | 422 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
1da177e4 LT |
423 | unsigned long flags; |
424 | unsigned int ret; | |
425 | ||
426 | spin_lock_irqsave(&up->port.lock, flags); | |
427 | ret = (sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS) ? TIOCSER_TEMT : 0; | |
428 | spin_unlock_irqrestore(&up->port.lock, flags); | |
429 | ||
430 | return ret; | |
431 | } | |
432 | ||
433 | static unsigned int serial_txx9_get_mctrl(struct uart_port *port) | |
434 | { | |
aa76224a | 435 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
1da177e4 LT |
436 | unsigned int ret; |
437 | ||
99999961 AN |
438 | /* no modem control lines */ |
439 | ret = TIOCM_CAR | TIOCM_DSR; | |
440 | ret |= (sio_in(up, TXX9_SIFLCR) & TXX9_SIFLCR_RTSSC) ? 0 : TIOCM_RTS; | |
441 | ret |= (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS) ? 0 : TIOCM_CTS; | |
1da177e4 LT |
442 | |
443 | return ret; | |
444 | } | |
445 | ||
446 | static void serial_txx9_set_mctrl(struct uart_port *port, unsigned int mctrl) | |
447 | { | |
aa76224a | 448 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
1da177e4 | 449 | |
1da177e4 LT |
450 | if (mctrl & TIOCM_RTS) |
451 | sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC); | |
452 | else | |
453 | sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RTSSC); | |
1da177e4 LT |
454 | } |
455 | ||
456 | static void serial_txx9_break_ctl(struct uart_port *port, int break_state) | |
457 | { | |
aa76224a | 458 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
1da177e4 LT |
459 | unsigned long flags; |
460 | ||
461 | spin_lock_irqsave(&up->port.lock, flags); | |
462 | if (break_state == -1) | |
463 | sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); | |
464 | else | |
465 | sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); | |
466 | spin_unlock_irqrestore(&up->port.lock, flags); | |
467 | } | |
468 | ||
f109293f | 469 | #if defined(CONFIG_SERIAL_TXX9_CONSOLE) || defined(CONFIG_CONSOLE_POLL) |
a10b32db AN |
470 | /* |
471 | * Wait for transmitter & holding register to empty | |
472 | */ | |
473 | static void wait_for_xmitr(struct uart_txx9_port *up) | |
474 | { | |
475 | unsigned int tmout = 10000; | |
476 | ||
477 | /* Wait up to 10ms for the character(s) to be sent. */ | |
478 | while (--tmout && | |
479 | !(sio_in(up, TXX9_SICISR) & TXX9_SICISR_TXALS)) | |
480 | udelay(1); | |
481 | ||
482 | /* Wait up to 1s for flow control if necessary */ | |
483 | if (up->port.flags & UPF_CONS_FLOW) { | |
484 | tmout = 1000000; | |
485 | while (--tmout && | |
486 | (sio_in(up, TXX9_SICISR) & TXX9_SICISR_CTSS)) | |
487 | udelay(1); | |
488 | } | |
489 | } | |
490 | #endif | |
491 | ||
492 | #ifdef CONFIG_CONSOLE_POLL | |
493 | /* | |
494 | * Console polling routines for writing and reading from the uart while | |
495 | * in an interrupt or debug context. | |
496 | */ | |
497 | ||
498 | static int serial_txx9_get_poll_char(struct uart_port *port) | |
499 | { | |
500 | unsigned int ier; | |
501 | unsigned char c; | |
aa76224a | 502 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
a10b32db AN |
503 | |
504 | /* | |
505 | * First save the IER then disable the interrupts | |
506 | */ | |
507 | ier = sio_in(up, TXX9_SIDICR); | |
508 | sio_out(up, TXX9_SIDICR, 0); | |
509 | ||
510 | while (sio_in(up, TXX9_SIDISR) & TXX9_SIDISR_UVALID) | |
511 | ; | |
512 | ||
513 | c = sio_in(up, TXX9_SIRFIFO); | |
514 | ||
515 | /* | |
516 | * Finally, clear RX interrupt status | |
517 | * and restore the IER | |
518 | */ | |
519 | sio_mask(up, TXX9_SIDISR, TXX9_SIDISR_RDIS); | |
520 | sio_out(up, TXX9_SIDICR, ier); | |
521 | return c; | |
522 | } | |
523 | ||
524 | ||
525 | static void serial_txx9_put_poll_char(struct uart_port *port, unsigned char c) | |
526 | { | |
527 | unsigned int ier; | |
aa76224a | 528 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
a10b32db AN |
529 | |
530 | /* | |
531 | * First save the IER then disable the interrupts | |
532 | */ | |
533 | ier = sio_in(up, TXX9_SIDICR); | |
534 | sio_out(up, TXX9_SIDICR, 0); | |
535 | ||
536 | wait_for_xmitr(up); | |
537 | /* | |
538 | * Send the character out. | |
539 | * If a LF, also do CR... | |
540 | */ | |
541 | sio_out(up, TXX9_SITFIFO, c); | |
542 | if (c == 10) { | |
543 | wait_for_xmitr(up); | |
544 | sio_out(up, TXX9_SITFIFO, 13); | |
545 | } | |
546 | ||
547 | /* | |
548 | * Finally, wait for transmitter to become empty | |
549 | * and restore the IER | |
550 | */ | |
551 | wait_for_xmitr(up); | |
552 | sio_out(up, TXX9_SIDICR, ier); | |
553 | } | |
554 | ||
555 | #endif /* CONFIG_CONSOLE_POLL */ | |
556 | ||
1da177e4 LT |
557 | static int serial_txx9_startup(struct uart_port *port) |
558 | { | |
aa76224a | 559 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
1da177e4 LT |
560 | unsigned long flags; |
561 | int retval; | |
562 | ||
563 | /* | |
564 | * Clear the FIFO buffers and disable them. | |
7f927fcc | 565 | * (they will be reenabled in set_termios()) |
1da177e4 LT |
566 | */ |
567 | sio_set(up, TXX9_SIFCR, | |
568 | TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); | |
569 | /* clear reset */ | |
570 | sio_mask(up, TXX9_SIFCR, | |
571 | TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); | |
572 | sio_out(up, TXX9_SIDICR, 0); | |
573 | ||
574 | /* | |
575 | * Clear the interrupt registers. | |
576 | */ | |
577 | sio_out(up, TXX9_SIDISR, 0); | |
578 | ||
579 | retval = request_irq(up->port.irq, serial_txx9_interrupt, | |
40663cc7 | 580 | IRQF_SHARED, "serial_txx9", up); |
1da177e4 LT |
581 | if (retval) |
582 | return retval; | |
583 | ||
584 | /* | |
585 | * Now, initialize the UART | |
586 | */ | |
587 | spin_lock_irqsave(&up->port.lock, flags); | |
588 | serial_txx9_set_mctrl(&up->port, up->port.mctrl); | |
589 | spin_unlock_irqrestore(&up->port.lock, flags); | |
590 | ||
591 | /* Enable RX/TX */ | |
592 | sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE); | |
593 | ||
594 | /* | |
595 | * Finally, enable interrupts. | |
596 | */ | |
597 | sio_set(up, TXX9_SIDICR, TXX9_SIDICR_RIE); | |
598 | ||
599 | return 0; | |
600 | } | |
601 | ||
602 | static void serial_txx9_shutdown(struct uart_port *port) | |
603 | { | |
aa76224a | 604 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
1da177e4 LT |
605 | unsigned long flags; |
606 | ||
607 | /* | |
608 | * Disable interrupts from this port | |
609 | */ | |
610 | sio_out(up, TXX9_SIDICR, 0); /* disable all intrs */ | |
611 | ||
612 | spin_lock_irqsave(&up->port.lock, flags); | |
613 | serial_txx9_set_mctrl(&up->port, up->port.mctrl); | |
614 | spin_unlock_irqrestore(&up->port.lock, flags); | |
615 | ||
616 | /* | |
617 | * Disable break condition | |
618 | */ | |
619 | sio_mask(up, TXX9_SIFLCR, TXX9_SIFLCR_TBRK); | |
620 | ||
621 | #ifdef CONFIG_SERIAL_TXX9_CONSOLE | |
622 | if (up->port.cons && up->port.line == up->port.cons->index) { | |
623 | free_irq(up->port.irq, up); | |
624 | return; | |
625 | } | |
626 | #endif | |
627 | /* reset FIFOs */ | |
628 | sio_set(up, TXX9_SIFCR, | |
629 | TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); | |
630 | /* clear reset */ | |
631 | sio_mask(up, TXX9_SIFCR, | |
632 | TXX9_SIFCR_TFRST | TXX9_SIFCR_RFRST | TXX9_SIFCR_FRSTE); | |
633 | ||
634 | /* Disable RX/TX */ | |
635 | sio_set(up, TXX9_SIFLCR, TXX9_SIFLCR_RSDE | TXX9_SIFLCR_TSDE); | |
636 | ||
637 | free_irq(up->port.irq, up); | |
638 | } | |
639 | ||
640 | static void | |
606d099c AC |
641 | serial_txx9_set_termios(struct uart_port *port, struct ktermios *termios, |
642 | struct ktermios *old) | |
1da177e4 | 643 | { |
aa76224a | 644 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
1da177e4 LT |
645 | unsigned int cval, fcr = 0; |
646 | unsigned long flags; | |
647 | unsigned int baud, quot; | |
648 | ||
99999961 AN |
649 | /* |
650 | * We don't support modem control lines. | |
651 | */ | |
652 | termios->c_cflag &= ~(HUPCL | CMSPAR); | |
653 | termios->c_cflag |= CLOCAL; | |
654 | ||
1da177e4 LT |
655 | cval = sio_in(up, TXX9_SILCR); |
656 | /* byte size and parity */ | |
657 | cval &= ~TXX9_SILCR_UMODE_MASK; | |
658 | switch (termios->c_cflag & CSIZE) { | |
659 | case CS7: | |
660 | cval |= TXX9_SILCR_UMODE_7BIT; | |
661 | break; | |
662 | default: | |
663 | case CS5: /* not supported */ | |
664 | case CS6: /* not supported */ | |
665 | case CS8: | |
666 | cval |= TXX9_SILCR_UMODE_8BIT; | |
667 | break; | |
668 | } | |
669 | ||
670 | cval &= ~TXX9_SILCR_USBL_MASK; | |
671 | if (termios->c_cflag & CSTOPB) | |
672 | cval |= TXX9_SILCR_USBL_2BIT; | |
673 | else | |
674 | cval |= TXX9_SILCR_USBL_1BIT; | |
675 | cval &= ~(TXX9_SILCR_UPEN | TXX9_SILCR_UEPS); | |
676 | if (termios->c_cflag & PARENB) | |
677 | cval |= TXX9_SILCR_UPEN; | |
678 | if (!(termios->c_cflag & PARODD)) | |
679 | cval |= TXX9_SILCR_UEPS; | |
680 | ||
681 | /* | |
682 | * Ask the core to calculate the divisor for us. | |
683 | */ | |
684 | baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk/16/2); | |
685 | quot = uart_get_divisor(port, baud); | |
686 | ||
687 | /* Set up FIFOs */ | |
688 | /* TX Int by FIFO Empty, RX Int by Receiving 1 char. */ | |
689 | fcr = TXX9_SIFCR_TDIL_MAX | TXX9_SIFCR_RDIL_1; | |
690 | ||
691 | /* | |
692 | * Ok, we're now changing the port state. Do it with | |
693 | * interrupts disabled. | |
694 | */ | |
695 | spin_lock_irqsave(&up->port.lock, flags); | |
696 | ||
697 | /* | |
698 | * Update the per-port timeout. | |
699 | */ | |
700 | uart_update_timeout(port, termios->c_cflag, baud); | |
701 | ||
702 | up->port.read_status_mask = TXX9_SIDISR_UOER | | |
703 | TXX9_SIDISR_TDIS | TXX9_SIDISR_RDIS; | |
704 | if (termios->c_iflag & INPCK) | |
705 | up->port.read_status_mask |= TXX9_SIDISR_UFER | TXX9_SIDISR_UPER; | |
706 | if (termios->c_iflag & (BRKINT | PARMRK)) | |
707 | up->port.read_status_mask |= TXX9_SIDISR_UBRK; | |
708 | ||
709 | /* | |
710 | * Characteres to ignore | |
711 | */ | |
712 | up->port.ignore_status_mask = 0; | |
713 | if (termios->c_iflag & IGNPAR) | |
714 | up->port.ignore_status_mask |= TXX9_SIDISR_UPER | TXX9_SIDISR_UFER; | |
715 | if (termios->c_iflag & IGNBRK) { | |
716 | up->port.ignore_status_mask |= TXX9_SIDISR_UBRK; | |
717 | /* | |
718 | * If we're ignoring parity and break indicators, | |
719 | * ignore overruns too (for real raw support). | |
720 | */ | |
721 | if (termios->c_iflag & IGNPAR) | |
722 | up->port.ignore_status_mask |= TXX9_SIDISR_UOER; | |
723 | } | |
724 | ||
725 | /* | |
726 | * ignore all characters if CREAD is not set | |
727 | */ | |
728 | if ((termios->c_cflag & CREAD) == 0) | |
729 | up->port.ignore_status_mask |= TXX9_SIDISR_RDIS; | |
730 | ||
731 | /* CTS flow control flag */ | |
732 | if ((termios->c_cflag & CRTSCTS) && | |
733 | (up->port.flags & UPF_TXX9_HAVE_CTS_LINE)) { | |
734 | sio_set(up, TXX9_SIFLCR, | |
735 | TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES); | |
736 | } else { | |
737 | sio_mask(up, TXX9_SIFLCR, | |
738 | TXX9_SIFLCR_RCS | TXX9_SIFLCR_TES); | |
739 | } | |
740 | ||
741 | sio_out(up, TXX9_SILCR, cval); | |
742 | sio_quot_set(up, quot); | |
743 | sio_out(up, TXX9_SIFCR, fcr); | |
744 | ||
745 | serial_txx9_set_mctrl(&up->port, up->port.mctrl); | |
746 | spin_unlock_irqrestore(&up->port.lock, flags); | |
747 | } | |
748 | ||
749 | static void | |
750 | serial_txx9_pm(struct uart_port *port, unsigned int state, | |
751 | unsigned int oldstate) | |
752 | { | |
23f42b7b AN |
753 | /* |
754 | * If oldstate was -1 this is called from | |
755 | * uart_configure_port(). In this case do not initialize the | |
756 | * port now, because the port was already initialized (for | |
757 | * non-console port) or should not be initialized here (for | |
758 | * console port). If we initialized the port here we lose | |
759 | * serial console settings. | |
760 | */ | |
761 | if (state == 0 && oldstate != -1) | |
0970769a | 762 | serial_txx9_initialize(port); |
1da177e4 LT |
763 | } |
764 | ||
765 | static int serial_txx9_request_resource(struct uart_txx9_port *up) | |
766 | { | |
767 | unsigned int size = TXX9_REGION_SIZE; | |
768 | int ret = 0; | |
769 | ||
770 | switch (up->port.iotype) { | |
771 | default: | |
772 | if (!up->port.mapbase) | |
773 | break; | |
774 | ||
775 | if (!request_mem_region(up->port.mapbase, size, "serial_txx9")) { | |
776 | ret = -EBUSY; | |
777 | break; | |
778 | } | |
779 | ||
780 | if (up->port.flags & UPF_IOREMAP) { | |
781 | up->port.membase = ioremap(up->port.mapbase, size); | |
782 | if (!up->port.membase) { | |
783 | release_mem_region(up->port.mapbase, size); | |
784 | ret = -ENOMEM; | |
785 | } | |
786 | } | |
787 | break; | |
788 | ||
789 | case UPIO_PORT: | |
790 | if (!request_region(up->port.iobase, size, "serial_txx9")) | |
791 | ret = -EBUSY; | |
792 | break; | |
793 | } | |
794 | return ret; | |
795 | } | |
796 | ||
797 | static void serial_txx9_release_resource(struct uart_txx9_port *up) | |
798 | { | |
799 | unsigned int size = TXX9_REGION_SIZE; | |
800 | ||
801 | switch (up->port.iotype) { | |
802 | default: | |
803 | if (!up->port.mapbase) | |
804 | break; | |
805 | ||
806 | if (up->port.flags & UPF_IOREMAP) { | |
807 | iounmap(up->port.membase); | |
808 | up->port.membase = NULL; | |
809 | } | |
810 | ||
811 | release_mem_region(up->port.mapbase, size); | |
812 | break; | |
813 | ||
814 | case UPIO_PORT: | |
815 | release_region(up->port.iobase, size); | |
816 | break; | |
817 | } | |
818 | } | |
819 | ||
820 | static void serial_txx9_release_port(struct uart_port *port) | |
821 | { | |
aa76224a | 822 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
1da177e4 LT |
823 | serial_txx9_release_resource(up); |
824 | } | |
825 | ||
826 | static int serial_txx9_request_port(struct uart_port *port) | |
827 | { | |
aa76224a | 828 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
1da177e4 LT |
829 | return serial_txx9_request_resource(up); |
830 | } | |
831 | ||
832 | static void serial_txx9_config_port(struct uart_port *port, int uflags) | |
833 | { | |
aa76224a | 834 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
1da177e4 LT |
835 | int ret; |
836 | ||
837 | /* | |
838 | * Find the region that we can probe for. This in turn | |
839 | * tells us whether we can probe for the type of port. | |
840 | */ | |
841 | ret = serial_txx9_request_resource(up); | |
842 | if (ret < 0) | |
843 | return; | |
844 | port->type = PORT_TXX9; | |
845 | up->port.fifosize = TXX9_SIO_TX_FIFO; | |
846 | ||
847 | #ifdef CONFIG_SERIAL_TXX9_CONSOLE | |
848 | if (up->port.line == up->port.cons->index) | |
849 | return; | |
850 | #endif | |
0970769a | 851 | serial_txx9_initialize(port); |
1da177e4 LT |
852 | } |
853 | ||
1da177e4 LT |
854 | static const char * |
855 | serial_txx9_type(struct uart_port *port) | |
856 | { | |
857 | return "txx9"; | |
858 | } | |
859 | ||
860 | static struct uart_ops serial_txx9_pops = { | |
861 | .tx_empty = serial_txx9_tx_empty, | |
862 | .set_mctrl = serial_txx9_set_mctrl, | |
863 | .get_mctrl = serial_txx9_get_mctrl, | |
864 | .stop_tx = serial_txx9_stop_tx, | |
865 | .start_tx = serial_txx9_start_tx, | |
866 | .stop_rx = serial_txx9_stop_rx, | |
867 | .enable_ms = serial_txx9_enable_ms, | |
868 | .break_ctl = serial_txx9_break_ctl, | |
869 | .startup = serial_txx9_startup, | |
870 | .shutdown = serial_txx9_shutdown, | |
871 | .set_termios = serial_txx9_set_termios, | |
872 | .pm = serial_txx9_pm, | |
873 | .type = serial_txx9_type, | |
874 | .release_port = serial_txx9_release_port, | |
875 | .request_port = serial_txx9_request_port, | |
876 | .config_port = serial_txx9_config_port, | |
a10b32db AN |
877 | #ifdef CONFIG_CONSOLE_POLL |
878 | .poll_get_char = serial_txx9_get_poll_char, | |
879 | .poll_put_char = serial_txx9_put_poll_char, | |
880 | #endif | |
1da177e4 LT |
881 | }; |
882 | ||
883 | static struct uart_txx9_port serial_txx9_ports[UART_NR]; | |
884 | ||
0970769a AN |
885 | static void __init serial_txx9_register_ports(struct uart_driver *drv, |
886 | struct device *dev) | |
1da177e4 LT |
887 | { |
888 | int i; | |
889 | ||
890 | for (i = 0; i < UART_NR; i++) { | |
891 | struct uart_txx9_port *up = &serial_txx9_ports[i]; | |
892 | ||
893 | up->port.line = i; | |
894 | up->port.ops = &serial_txx9_pops; | |
0970769a | 895 | up->port.dev = dev; |
83485f82 AN |
896 | if (up->port.iobase || up->port.mapbase) |
897 | uart_add_one_port(drv, &up->port); | |
1da177e4 LT |
898 | } |
899 | } | |
900 | ||
901 | #ifdef CONFIG_SERIAL_TXX9_CONSOLE | |
902 | ||
d358788f RK |
903 | static void serial_txx9_console_putchar(struct uart_port *port, int ch) |
904 | { | |
aa76224a | 905 | struct uart_txx9_port *up = to_uart_txx9_port(port); |
d358788f RK |
906 | |
907 | wait_for_xmitr(up); | |
908 | sio_out(up, TXX9_SITFIFO, ch); | |
909 | } | |
910 | ||
1da177e4 LT |
911 | /* |
912 | * Print a string to the serial port trying not to disturb | |
913 | * any possible real use of the port... | |
914 | * | |
915 | * The console_lock must be held when we get here. | |
916 | */ | |
917 | static void | |
918 | serial_txx9_console_write(struct console *co, const char *s, unsigned int count) | |
919 | { | |
920 | struct uart_txx9_port *up = &serial_txx9_ports[co->index]; | |
921 | unsigned int ier, flcr; | |
1da177e4 LT |
922 | |
923 | /* | |
924 | * First save the UER then disable the interrupts | |
925 | */ | |
926 | ier = sio_in(up, TXX9_SIDICR); | |
927 | sio_out(up, TXX9_SIDICR, 0); | |
928 | /* | |
929 | * Disable flow-control if enabled (and unnecessary) | |
930 | */ | |
931 | flcr = sio_in(up, TXX9_SIFLCR); | |
932 | if (!(up->port.flags & UPF_CONS_FLOW) && (flcr & TXX9_SIFLCR_TES)) | |
933 | sio_out(up, TXX9_SIFLCR, flcr & ~TXX9_SIFLCR_TES); | |
934 | ||
d358788f | 935 | uart_console_write(&up->port, s, count, serial_txx9_console_putchar); |
1da177e4 LT |
936 | |
937 | /* | |
938 | * Finally, wait for transmitter to become empty | |
939 | * and restore the IER | |
940 | */ | |
941 | wait_for_xmitr(up); | |
942 | sio_out(up, TXX9_SIFLCR, flcr); | |
943 | sio_out(up, TXX9_SIDICR, ier); | |
944 | } | |
945 | ||
0970769a | 946 | static int __init serial_txx9_console_setup(struct console *co, char *options) |
1da177e4 LT |
947 | { |
948 | struct uart_port *port; | |
949 | struct uart_txx9_port *up; | |
950 | int baud = 9600; | |
951 | int bits = 8; | |
952 | int parity = 'n'; | |
953 | int flow = 'n'; | |
954 | ||
955 | /* | |
956 | * Check whether an invalid uart number has been specified, and | |
957 | * if so, search for the first available port that does have | |
958 | * console support. | |
959 | */ | |
960 | if (co->index >= UART_NR) | |
961 | co->index = 0; | |
962 | up = &serial_txx9_ports[co->index]; | |
963 | port = &up->port; | |
964 | if (!port->ops) | |
965 | return -ENODEV; | |
966 | ||
0970769a | 967 | serial_txx9_initialize(&up->port); |
1da177e4 LT |
968 | |
969 | if (options) | |
970 | uart_parse_options(options, &baud, &parity, &bits, &flow); | |
971 | ||
972 | return uart_set_options(port, co, baud, parity, bits, flow); | |
973 | } | |
974 | ||
975 | static struct uart_driver serial_txx9_reg; | |
976 | static struct console serial_txx9_console = { | |
977 | .name = TXX9_TTY_NAME, | |
978 | .write = serial_txx9_console_write, | |
979 | .device = uart_console_device, | |
980 | .setup = serial_txx9_console_setup, | |
981 | .flags = CON_PRINTBUFFER, | |
982 | .index = -1, | |
983 | .data = &serial_txx9_reg, | |
984 | }; | |
985 | ||
986 | static int __init serial_txx9_console_init(void) | |
987 | { | |
988 | register_console(&serial_txx9_console); | |
989 | return 0; | |
990 | } | |
991 | console_initcall(serial_txx9_console_init); | |
992 | ||
1da177e4 LT |
993 | #define SERIAL_TXX9_CONSOLE &serial_txx9_console |
994 | #else | |
995 | #define SERIAL_TXX9_CONSOLE NULL | |
996 | #endif | |
997 | ||
998 | static struct uart_driver serial_txx9_reg = { | |
999 | .owner = THIS_MODULE, | |
1000 | .driver_name = "serial_txx9", | |
1da177e4 LT |
1001 | .dev_name = TXX9_TTY_NAME, |
1002 | .major = TXX9_TTY_MAJOR, | |
1003 | .minor = TXX9_TTY_MINOR_START, | |
1004 | .nr = UART_NR, | |
1005 | .cons = SERIAL_TXX9_CONSOLE, | |
1006 | }; | |
1007 | ||
1008 | int __init early_serial_txx9_setup(struct uart_port *port) | |
1009 | { | |
1010 | if (port->line >= ARRAY_SIZE(serial_txx9_ports)) | |
1011 | return -ENODEV; | |
1012 | ||
1013 | serial_txx9_ports[port->line].port = *port; | |
1014 | serial_txx9_ports[port->line].port.ops = &serial_txx9_pops; | |
37a6c7d0 AN |
1015 | serial_txx9_ports[port->line].port.flags |= |
1016 | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT; | |
1da177e4 LT |
1017 | return 0; |
1018 | } | |
1019 | ||
f392ecfa | 1020 | static DEFINE_MUTEX(serial_txx9_mutex); |
f5ee56cc RB |
1021 | |
1022 | /** | |
1023 | * serial_txx9_register_port - register a serial port | |
1024 | * @port: serial port template | |
1025 | * | |
1026 | * Configure the serial port specified by the request. | |
1027 | * | |
1028 | * The port is then probed and if necessary the IRQ is autodetected | |
1029 | * If this fails an error is returned. | |
1030 | * | |
1031 | * On success the port is ready to use and the line number is returned. | |
1032 | */ | |
1033 | static int __devinit serial_txx9_register_port(struct uart_port *port) | |
1034 | { | |
1035 | int i; | |
1036 | struct uart_txx9_port *uart; | |
1037 | int ret = -ENOSPC; | |
1038 | ||
f392ecfa | 1039 | mutex_lock(&serial_txx9_mutex); |
f5ee56cc RB |
1040 | for (i = 0; i < UART_NR; i++) { |
1041 | uart = &serial_txx9_ports[i]; | |
0970769a AN |
1042 | if (uart_match_port(&uart->port, port)) { |
1043 | uart_remove_one_port(&serial_txx9_reg, &uart->port); | |
f5ee56cc | 1044 | break; |
0970769a AN |
1045 | } |
1046 | } | |
1047 | if (i == UART_NR) { | |
1048 | /* Find unused port */ | |
1049 | for (i = 0; i < UART_NR; i++) { | |
1050 | uart = &serial_txx9_ports[i]; | |
1051 | if (!(uart->port.iobase || uart->port.mapbase)) | |
1052 | break; | |
1053 | } | |
f5ee56cc RB |
1054 | } |
1055 | if (i < UART_NR) { | |
f5ee56cc RB |
1056 | uart->port.iobase = port->iobase; |
1057 | uart->port.membase = port->membase; | |
1058 | uart->port.irq = port->irq; | |
1059 | uart->port.uartclk = port->uartclk; | |
1060 | uart->port.iotype = port->iotype; | |
37a6c7d0 AN |
1061 | uart->port.flags = port->flags |
1062 | | UPF_BOOT_AUTOCONF | UPF_FIXED_PORT; | |
f5ee56cc RB |
1063 | uart->port.mapbase = port->mapbase; |
1064 | if (port->dev) | |
1065 | uart->port.dev = port->dev; | |
1066 | ret = uart_add_one_port(&serial_txx9_reg, &uart->port); | |
1067 | if (ret == 0) | |
1068 | ret = uart->port.line; | |
1069 | } | |
f392ecfa | 1070 | mutex_unlock(&serial_txx9_mutex); |
f5ee56cc RB |
1071 | return ret; |
1072 | } | |
1073 | ||
1074 | /** | |
1075 | * serial_txx9_unregister_port - remove a txx9 serial port at runtime | |
1076 | * @line: serial line number | |
1077 | * | |
1078 | * Remove one serial port. This may not be called from interrupt | |
1079 | * context. We hand the port back to the our control. | |
1080 | */ | |
1081 | static void __devexit serial_txx9_unregister_port(int line) | |
1082 | { | |
1083 | struct uart_txx9_port *uart = &serial_txx9_ports[line]; | |
1084 | ||
f392ecfa | 1085 | mutex_lock(&serial_txx9_mutex); |
f5ee56cc RB |
1086 | uart_remove_one_port(&serial_txx9_reg, &uart->port); |
1087 | uart->port.flags = 0; | |
1088 | uart->port.type = PORT_UNKNOWN; | |
1089 | uart->port.iobase = 0; | |
1090 | uart->port.mapbase = 0; | |
83485f82 | 1091 | uart->port.membase = NULL; |
f5ee56cc | 1092 | uart->port.dev = NULL; |
f392ecfa | 1093 | mutex_unlock(&serial_txx9_mutex); |
f5ee56cc RB |
1094 | } |
1095 | ||
0970769a AN |
1096 | /* |
1097 | * Register a set of serial devices attached to a platform device. | |
1098 | */ | |
1099 | static int __devinit serial_txx9_probe(struct platform_device *dev) | |
1100 | { | |
1101 | struct uart_port *p = dev->dev.platform_data; | |
1102 | struct uart_port port; | |
1103 | int ret, i; | |
1104 | ||
1105 | memset(&port, 0, sizeof(struct uart_port)); | |
1106 | for (i = 0; p && p->uartclk != 0; p++, i++) { | |
1107 | port.iobase = p->iobase; | |
1108 | port.membase = p->membase; | |
1109 | port.irq = p->irq; | |
1110 | port.uartclk = p->uartclk; | |
1111 | port.iotype = p->iotype; | |
1112 | port.flags = p->flags; | |
1113 | port.mapbase = p->mapbase; | |
1114 | port.dev = &dev->dev; | |
1115 | ret = serial_txx9_register_port(&port); | |
1116 | if (ret < 0) { | |
1117 | dev_err(&dev->dev, "unable to register port at index %d " | |
8433ac61 | 1118 | "(IO%lx MEM%llx IRQ%d): %d\n", i, |
ddb437b7 AN |
1119 | p->iobase, (unsigned long long)p->mapbase, |
1120 | p->irq, ret); | |
0970769a AN |
1121 | } |
1122 | } | |
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | /* | |
1127 | * Remove serial ports registered against a platform device. | |
1128 | */ | |
1129 | static int __devexit serial_txx9_remove(struct platform_device *dev) | |
1130 | { | |
1131 | int i; | |
1132 | ||
1133 | for (i = 0; i < UART_NR; i++) { | |
1134 | struct uart_txx9_port *up = &serial_txx9_ports[i]; | |
1135 | ||
1136 | if (up->port.dev == &dev->dev) | |
1137 | serial_txx9_unregister_port(i); | |
1138 | } | |
1139 | return 0; | |
1140 | } | |
1141 | ||
1142 | #ifdef CONFIG_PM | |
1143 | static int serial_txx9_suspend(struct platform_device *dev, pm_message_t state) | |
1144 | { | |
1145 | int i; | |
1146 | ||
1147 | for (i = 0; i < UART_NR; i++) { | |
1148 | struct uart_txx9_port *up = &serial_txx9_ports[i]; | |
1149 | ||
1150 | if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev) | |
1151 | uart_suspend_port(&serial_txx9_reg, &up->port); | |
1152 | } | |
1153 | ||
1154 | return 0; | |
1155 | } | |
1156 | ||
1157 | static int serial_txx9_resume(struct platform_device *dev) | |
1158 | { | |
1159 | int i; | |
1160 | ||
1161 | for (i = 0; i < UART_NR; i++) { | |
1162 | struct uart_txx9_port *up = &serial_txx9_ports[i]; | |
1163 | ||
1164 | if (up->port.type != PORT_UNKNOWN && up->port.dev == &dev->dev) | |
1165 | uart_resume_port(&serial_txx9_reg, &up->port); | |
1166 | } | |
1167 | ||
1168 | return 0; | |
1169 | } | |
1170 | #endif | |
1171 | ||
1172 | static struct platform_driver serial_txx9_plat_driver = { | |
1173 | .probe = serial_txx9_probe, | |
1174 | .remove = __devexit_p(serial_txx9_remove), | |
1175 | #ifdef CONFIG_PM | |
1176 | .suspend = serial_txx9_suspend, | |
1177 | .resume = serial_txx9_resume, | |
1178 | #endif | |
1179 | .driver = { | |
1180 | .name = "serial_txx9", | |
1181 | .owner = THIS_MODULE, | |
1182 | }, | |
1183 | }; | |
1184 | ||
1185 | #ifdef ENABLE_SERIAL_TXX9_PCI | |
1da177e4 LT |
1186 | /* |
1187 | * Probe one serial board. Unfortunately, there is no rhyme nor reason | |
1188 | * to the arrangement of serial ports on a PCI card. | |
1189 | */ | |
1190 | static int __devinit | |
1191 | pciserial_txx9_init_one(struct pci_dev *dev, const struct pci_device_id *ent) | |
1192 | { | |
1193 | struct uart_port port; | |
1194 | int line; | |
1195 | int rc; | |
1196 | ||
1197 | rc = pci_enable_device(dev); | |
1198 | if (rc) | |
1199 | return rc; | |
1200 | ||
1201 | memset(&port, 0, sizeof(port)); | |
1202 | port.ops = &serial_txx9_pops; | |
1da177e4 LT |
1203 | port.flags |= UPF_TXX9_HAVE_CTS_LINE; |
1204 | port.uartclk = 66670000; | |
1205 | port.irq = dev->irq; | |
1206 | port.iotype = UPIO_PORT; | |
1207 | port.iobase = pci_resource_start(dev, 1); | |
f5ee56cc RB |
1208 | port.dev = &dev->dev; |
1209 | line = serial_txx9_register_port(&port); | |
1da177e4 LT |
1210 | if (line < 0) { |
1211 | printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), line); | |
0970769a AN |
1212 | pci_disable_device(dev); |
1213 | return line; | |
1da177e4 | 1214 | } |
0970769a | 1215 | pci_set_drvdata(dev, &serial_txx9_ports[line]); |
1da177e4 LT |
1216 | |
1217 | return 0; | |
1218 | } | |
1219 | ||
1220 | static void __devexit pciserial_txx9_remove_one(struct pci_dev *dev) | |
1221 | { | |
0970769a | 1222 | struct uart_txx9_port *up = pci_get_drvdata(dev); |
1da177e4 LT |
1223 | |
1224 | pci_set_drvdata(dev, NULL); | |
1225 | ||
0970769a AN |
1226 | if (up) { |
1227 | serial_txx9_unregister_port(up->port.line); | |
1da177e4 LT |
1228 | pci_disable_device(dev); |
1229 | } | |
1230 | } | |
1231 | ||
138c5d25 | 1232 | #ifdef CONFIG_PM |
0370affe | 1233 | static int pciserial_txx9_suspend_one(struct pci_dev *dev, pm_message_t state) |
1da177e4 | 1234 | { |
0970769a | 1235 | struct uart_txx9_port *up = pci_get_drvdata(dev); |
1da177e4 | 1236 | |
0970769a AN |
1237 | if (up) |
1238 | uart_suspend_port(&serial_txx9_reg, &up->port); | |
f5ee56cc RB |
1239 | pci_save_state(dev); |
1240 | pci_set_power_state(dev, pci_choose_state(dev, state)); | |
1da177e4 LT |
1241 | return 0; |
1242 | } | |
1243 | ||
1244 | static int pciserial_txx9_resume_one(struct pci_dev *dev) | |
1245 | { | |
0970769a | 1246 | struct uart_txx9_port *up = pci_get_drvdata(dev); |
1da177e4 | 1247 | |
f5ee56cc RB |
1248 | pci_set_power_state(dev, PCI_D0); |
1249 | pci_restore_state(dev); | |
0970769a AN |
1250 | if (up) |
1251 | uart_resume_port(&serial_txx9_reg, &up->port); | |
1da177e4 LT |
1252 | return 0; |
1253 | } | |
138c5d25 | 1254 | #endif |
1da177e4 | 1255 | |
138c5d25 AN |
1256 | static const struct pci_device_id serial_txx9_pci_tbl[] = { |
1257 | { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA_2, PCI_DEVICE_ID_TOSHIBA_TC86C001_MISC) }, | |
1da177e4 LT |
1258 | { 0, } |
1259 | }; | |
1260 | ||
1261 | static struct pci_driver serial_txx9_pci_driver = { | |
1262 | .name = "serial_txx9", | |
1263 | .probe = pciserial_txx9_init_one, | |
1264 | .remove = __devexit_p(pciserial_txx9_remove_one), | |
138c5d25 | 1265 | #ifdef CONFIG_PM |
1da177e4 LT |
1266 | .suspend = pciserial_txx9_suspend_one, |
1267 | .resume = pciserial_txx9_resume_one, | |
138c5d25 | 1268 | #endif |
1da177e4 LT |
1269 | .id_table = serial_txx9_pci_tbl, |
1270 | }; | |
1271 | ||
1272 | MODULE_DEVICE_TABLE(pci, serial_txx9_pci_tbl); | |
1273 | #endif /* ENABLE_SERIAL_TXX9_PCI */ | |
1274 | ||
0970769a AN |
1275 | static struct platform_device *serial_txx9_plat_devs; |
1276 | ||
1da177e4 LT |
1277 | static int __init serial_txx9_init(void) |
1278 | { | |
1279 | int ret; | |
1280 | ||
1281 | printk(KERN_INFO "%s version %s\n", serial_name, serial_version); | |
1282 | ||
1283 | ret = uart_register_driver(&serial_txx9_reg); | |
0970769a AN |
1284 | if (ret) |
1285 | goto out; | |
1286 | ||
1287 | serial_txx9_plat_devs = platform_device_alloc("serial_txx9", -1); | |
1288 | if (!serial_txx9_plat_devs) { | |
1289 | ret = -ENOMEM; | |
1290 | goto unreg_uart_drv; | |
1291 | } | |
1292 | ||
1293 | ret = platform_device_add(serial_txx9_plat_devs); | |
1294 | if (ret) | |
1295 | goto put_dev; | |
1296 | ||
1297 | serial_txx9_register_ports(&serial_txx9_reg, | |
1298 | &serial_txx9_plat_devs->dev); | |
1299 | ||
1300 | ret = platform_driver_register(&serial_txx9_plat_driver); | |
1301 | if (ret) | |
1302 | goto del_dev; | |
1da177e4 LT |
1303 | |
1304 | #ifdef ENABLE_SERIAL_TXX9_PCI | |
0970769a | 1305 | ret = pci_register_driver(&serial_txx9_pci_driver); |
1da177e4 | 1306 | #endif |
0970769a AN |
1307 | if (ret == 0) |
1308 | goto out; | |
1309 | ||
1310 | del_dev: | |
1311 | platform_device_del(serial_txx9_plat_devs); | |
1312 | put_dev: | |
1313 | platform_device_put(serial_txx9_plat_devs); | |
1314 | unreg_uart_drv: | |
1315 | uart_unregister_driver(&serial_txx9_reg); | |
1316 | out: | |
1da177e4 LT |
1317 | return ret; |
1318 | } | |
1319 | ||
1320 | static void __exit serial_txx9_exit(void) | |
1321 | { | |
1322 | int i; | |
1323 | ||
1324 | #ifdef ENABLE_SERIAL_TXX9_PCI | |
1325 | pci_unregister_driver(&serial_txx9_pci_driver); | |
1326 | #endif | |
0970769a AN |
1327 | platform_driver_unregister(&serial_txx9_plat_driver); |
1328 | platform_device_unregister(serial_txx9_plat_devs); | |
83485f82 AN |
1329 | for (i = 0; i < UART_NR; i++) { |
1330 | struct uart_txx9_port *up = &serial_txx9_ports[i]; | |
1331 | if (up->port.iobase || up->port.mapbase) | |
1332 | uart_remove_one_port(&serial_txx9_reg, &up->port); | |
1333 | } | |
1da177e4 LT |
1334 | |
1335 | uart_unregister_driver(&serial_txx9_reg); | |
1336 | } | |
1337 | ||
1338 | module_init(serial_txx9_init); | |
1339 | module_exit(serial_txx9_exit); | |
1340 | ||
1341 | MODULE_LICENSE("GPL"); | |
1342 | MODULE_DESCRIPTION("TX39/49 serial driver"); | |
1343 | ||
1344 | MODULE_ALIAS_CHARDEV_MAJOR(TXX9_TTY_MAJOR); |