Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
c1017a4c | 2 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
1da177e4 LT |
3 | * Routines for control of MPU-401 in UART mode |
4 | * | |
5 | * MPU-401 supports UART mode which is not capable generate transmit | |
6 | * interrupts thus output is done via polling. Also, if irq < 0, then | |
7 | * input is done also via polling. Do not expect good performance. | |
8 | * | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
23 | * | |
24 | * 13-03-2003: | |
25 | * Added support for different kind of hardware I/O. Build in choices | |
26 | * are port and mmio. For other kind of I/O, set mpu->read and | |
27 | * mpu->write to your own I/O functions. | |
28 | * | |
29 | */ | |
30 | ||
31 | #include <sound/driver.h> | |
32 | #include <asm/io.h> | |
33 | #include <linux/delay.h> | |
34 | #include <linux/init.h> | |
35 | #include <linux/slab.h> | |
36 | #include <linux/ioport.h> | |
37 | #include <linux/interrupt.h> | |
38 | #include <linux/errno.h> | |
39 | #include <sound/core.h> | |
40 | #include <sound/mpu401.h> | |
41 | ||
c1017a4c | 42 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
43 | MODULE_DESCRIPTION("Routines for control of MPU-401 in UART mode"); |
44 | MODULE_LICENSE("GPL"); | |
45 | ||
e1fad17b TI |
46 | static void snd_mpu401_uart_input_read(struct snd_mpu401 * mpu); |
47 | static void snd_mpu401_uart_output_write(struct snd_mpu401 * mpu); | |
1da177e4 LT |
48 | |
49 | /* | |
50 | ||
51 | */ | |
52 | ||
53 | #define snd_mpu401_input_avail(mpu) (!(mpu->read(mpu, MPU401C(mpu)) & 0x80)) | |
54 | #define snd_mpu401_output_ready(mpu) (!(mpu->read(mpu, MPU401C(mpu)) & 0x40)) | |
55 | ||
56 | #define MPU401_RESET 0xff | |
57 | #define MPU401_ENTER_UART 0x3f | |
58 | #define MPU401_ACK 0xfe | |
59 | ||
60 | /* Build in lowlevel io */ | |
2851d963 TI |
61 | static void mpu401_write_port(struct snd_mpu401 *mpu, unsigned char data, |
62 | unsigned long addr) | |
1da177e4 LT |
63 | { |
64 | outb(data, addr); | |
65 | } | |
66 | ||
2851d963 TI |
67 | static unsigned char mpu401_read_port(struct snd_mpu401 *mpu, |
68 | unsigned long addr) | |
1da177e4 LT |
69 | { |
70 | return inb(addr); | |
71 | } | |
72 | ||
2851d963 TI |
73 | static void mpu401_write_mmio(struct snd_mpu401 *mpu, unsigned char data, |
74 | unsigned long addr) | |
1da177e4 LT |
75 | { |
76 | writeb(data, (void __iomem *)addr); | |
77 | } | |
78 | ||
2851d963 TI |
79 | static unsigned char mpu401_read_mmio(struct snd_mpu401 *mpu, |
80 | unsigned long addr) | |
1da177e4 LT |
81 | { |
82 | return readb((void __iomem *)addr); | |
83 | } | |
84 | /* */ | |
85 | ||
e1fad17b | 86 | static void snd_mpu401_uart_clear_rx(struct snd_mpu401 *mpu) |
1da177e4 LT |
87 | { |
88 | int timeout = 100000; | |
89 | for (; timeout > 0 && snd_mpu401_input_avail(mpu); timeout--) | |
90 | mpu->read(mpu, MPU401D(mpu)); | |
91 | #ifdef CONFIG_SND_DEBUG | |
92 | if (timeout <= 0) | |
2851d963 TI |
93 | snd_printk(KERN_ERR "cmd: clear rx timeout (status = 0x%x)\n", |
94 | mpu->read(mpu, MPU401C(mpu))); | |
1da177e4 LT |
95 | #endif |
96 | } | |
97 | ||
302e4c2f | 98 | static void uart_interrupt_tx(struct snd_mpu401 *mpu) |
1da177e4 | 99 | { |
1da177e4 LT |
100 | if (test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode) && |
101 | test_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode)) { | |
102 | spin_lock(&mpu->output_lock); | |
103 | snd_mpu401_uart_output_write(mpu); | |
104 | spin_unlock(&mpu->output_lock); | |
105 | } | |
106 | } | |
107 | ||
302e4c2f TI |
108 | static void _snd_mpu401_uart_interrupt(struct snd_mpu401 *mpu) |
109 | { | |
110 | if (mpu->info_flags & MPU401_INFO_INPUT) { | |
111 | spin_lock(&mpu->input_lock); | |
112 | if (test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) | |
113 | snd_mpu401_uart_input_read(mpu); | |
114 | else | |
115 | snd_mpu401_uart_clear_rx(mpu); | |
116 | spin_unlock(&mpu->input_lock); | |
117 | } | |
118 | if (! (mpu->info_flags & MPU401_INFO_TX_IRQ)) | |
119 | /* ok. for better Tx performance try do some output | |
120 | when input is done */ | |
121 | uart_interrupt_tx(mpu); | |
122 | } | |
123 | ||
1da177e4 LT |
124 | /** |
125 | * snd_mpu401_uart_interrupt - generic MPU401-UART interrupt handler | |
126 | * @irq: the irq number | |
127 | * @dev_id: mpu401 instance | |
1da177e4 LT |
128 | * |
129 | * Processes the interrupt for MPU401-UART i/o. | |
130 | */ | |
7d12e780 | 131 | irqreturn_t snd_mpu401_uart_interrupt(int irq, void *dev_id) |
1da177e4 | 132 | { |
e1fad17b | 133 | struct snd_mpu401 *mpu = dev_id; |
1da177e4 LT |
134 | |
135 | if (mpu == NULL) | |
136 | return IRQ_NONE; | |
137 | _snd_mpu401_uart_interrupt(mpu); | |
138 | return IRQ_HANDLED; | |
139 | } | |
140 | ||
2851d963 TI |
141 | EXPORT_SYMBOL(snd_mpu401_uart_interrupt); |
142 | ||
302e4c2f TI |
143 | /** |
144 | * snd_mpu401_uart_interrupt_tx - generic MPU401-UART transmit irq handler | |
145 | * @irq: the irq number | |
146 | * @dev_id: mpu401 instance | |
302e4c2f TI |
147 | * |
148 | * Processes the interrupt for MPU401-UART output. | |
149 | */ | |
7d12e780 | 150 | irqreturn_t snd_mpu401_uart_interrupt_tx(int irq, void *dev_id) |
302e4c2f TI |
151 | { |
152 | struct snd_mpu401 *mpu = dev_id; | |
153 | ||
154 | if (mpu == NULL) | |
155 | return IRQ_NONE; | |
156 | uart_interrupt_tx(mpu); | |
157 | return IRQ_HANDLED; | |
158 | } | |
159 | ||
160 | EXPORT_SYMBOL(snd_mpu401_uart_interrupt_tx); | |
161 | ||
1da177e4 LT |
162 | /* |
163 | * timer callback | |
164 | * reprogram the timer and call the interrupt job | |
165 | */ | |
166 | static void snd_mpu401_uart_timer(unsigned long data) | |
167 | { | |
e1fad17b | 168 | struct snd_mpu401 *mpu = (struct snd_mpu401 *)data; |
b32425ac | 169 | unsigned long flags; |
1da177e4 | 170 | |
b32425ac | 171 | spin_lock_irqsave(&mpu->timer_lock, flags); |
1da177e4 LT |
172 | /*mpu->mode |= MPU401_MODE_TIMER;*/ |
173 | mpu->timer.expires = 1 + jiffies; | |
174 | add_timer(&mpu->timer); | |
b32425ac | 175 | spin_unlock_irqrestore(&mpu->timer_lock, flags); |
1da177e4 LT |
176 | if (mpu->rmidi) |
177 | _snd_mpu401_uart_interrupt(mpu); | |
178 | } | |
179 | ||
180 | /* | |
181 | * initialize the timer callback if not programmed yet | |
182 | */ | |
e1fad17b | 183 | static void snd_mpu401_uart_add_timer (struct snd_mpu401 *mpu, int input) |
1da177e4 LT |
184 | { |
185 | unsigned long flags; | |
186 | ||
187 | spin_lock_irqsave (&mpu->timer_lock, flags); | |
188 | if (mpu->timer_invoked == 0) { | |
189 | init_timer(&mpu->timer); | |
190 | mpu->timer.data = (unsigned long)mpu; | |
191 | mpu->timer.function = snd_mpu401_uart_timer; | |
192 | mpu->timer.expires = 1 + jiffies; | |
193 | add_timer(&mpu->timer); | |
194 | } | |
2851d963 TI |
195 | mpu->timer_invoked |= input ? MPU401_MODE_INPUT_TIMER : |
196 | MPU401_MODE_OUTPUT_TIMER; | |
1da177e4 LT |
197 | spin_unlock_irqrestore (&mpu->timer_lock, flags); |
198 | } | |
199 | ||
200 | /* | |
201 | * remove the timer callback if still active | |
202 | */ | |
e1fad17b | 203 | static void snd_mpu401_uart_remove_timer (struct snd_mpu401 *mpu, int input) |
1da177e4 LT |
204 | { |
205 | unsigned long flags; | |
206 | ||
207 | spin_lock_irqsave (&mpu->timer_lock, flags); | |
208 | if (mpu->timer_invoked) { | |
2851d963 TI |
209 | mpu->timer_invoked &= input ? ~MPU401_MODE_INPUT_TIMER : |
210 | ~MPU401_MODE_OUTPUT_TIMER; | |
1da177e4 LT |
211 | if (! mpu->timer_invoked) |
212 | del_timer(&mpu->timer); | |
213 | } | |
214 | spin_unlock_irqrestore (&mpu->timer_lock, flags); | |
215 | } | |
216 | ||
217 | /* | |
2851d963 TI |
218 | * send a UART command |
219 | * return zero if successful, non-zero for some errors | |
1da177e4 LT |
220 | */ |
221 | ||
962f831f | 222 | static int snd_mpu401_uart_cmd(struct snd_mpu401 * mpu, unsigned char cmd, |
2851d963 | 223 | int ack) |
1da177e4 LT |
224 | { |
225 | unsigned long flags; | |
226 | int timeout, ok; | |
227 | ||
228 | spin_lock_irqsave(&mpu->input_lock, flags); | |
229 | if (mpu->hardware != MPU401_HW_TRID4DWAVE) { | |
230 | mpu->write(mpu, 0x00, MPU401D(mpu)); | |
231 | /*snd_mpu401_uart_clear_rx(mpu);*/ | |
232 | } | |
233 | /* ok. standard MPU-401 initialization */ | |
234 | if (mpu->hardware != MPU401_HW_SB) { | |
2851d963 TI |
235 | for (timeout = 1000; timeout > 0 && |
236 | !snd_mpu401_output_ready(mpu); timeout--) | |
1da177e4 LT |
237 | udelay(10); |
238 | #ifdef CONFIG_SND_DEBUG | |
239 | if (!timeout) | |
2851d963 TI |
240 | snd_printk(KERN_ERR "cmd: tx timeout (status = 0x%x)\n", |
241 | mpu->read(mpu, MPU401C(mpu))); | |
1da177e4 LT |
242 | #endif |
243 | } | |
244 | mpu->write(mpu, cmd, MPU401C(mpu)); | |
245 | if (ack) { | |
246 | ok = 0; | |
247 | timeout = 10000; | |
248 | while (!ok && timeout-- > 0) { | |
249 | if (snd_mpu401_input_avail(mpu)) { | |
250 | if (mpu->read(mpu, MPU401D(mpu)) == MPU401_ACK) | |
251 | ok = 1; | |
252 | } | |
253 | } | |
254 | if (!ok && mpu->read(mpu, MPU401D(mpu)) == MPU401_ACK) | |
255 | ok = 1; | |
2851d963 | 256 | } else |
1da177e4 | 257 | ok = 1; |
1da177e4 | 258 | spin_unlock_irqrestore(&mpu->input_lock, flags); |
962f831f | 259 | if (!ok) { |
2851d963 TI |
260 | snd_printk(KERN_ERR "cmd: 0x%x failed at 0x%lx " |
261 | "(status = 0x%x, data = 0x%x)\n", cmd, mpu->port, | |
262 | mpu->read(mpu, MPU401C(mpu)), | |
263 | mpu->read(mpu, MPU401D(mpu))); | |
962f831f JM |
264 | return 1; |
265 | } | |
266 | return 0; | |
1da177e4 LT |
267 | } |
268 | ||
8f7ba051 TI |
269 | static int snd_mpu401_do_reset(struct snd_mpu401 *mpu) |
270 | { | |
271 | if (snd_mpu401_uart_cmd(mpu, MPU401_RESET, 1)) | |
272 | return -EIO; | |
c1099fcb | 273 | if (snd_mpu401_uart_cmd(mpu, MPU401_ENTER_UART, 0)) |
8f7ba051 TI |
274 | return -EIO; |
275 | return 0; | |
276 | } | |
277 | ||
1da177e4 LT |
278 | /* |
279 | * input/output open/close - protected by open_mutex in rawmidi.c | |
280 | */ | |
e1fad17b | 281 | static int snd_mpu401_uart_input_open(struct snd_rawmidi_substream *substream) |
1da177e4 | 282 | { |
e1fad17b | 283 | struct snd_mpu401 *mpu; |
1da177e4 LT |
284 | int err; |
285 | ||
286 | mpu = substream->rmidi->private_data; | |
287 | if (mpu->open_input && (err = mpu->open_input(mpu)) < 0) | |
288 | return err; | |
289 | if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode)) { | |
8f7ba051 | 290 | if (snd_mpu401_do_reset(mpu) < 0) |
962f831f | 291 | goto error_out; |
1da177e4 LT |
292 | } |
293 | mpu->substream_input = substream; | |
294 | set_bit(MPU401_MODE_BIT_INPUT, &mpu->mode); | |
295 | return 0; | |
962f831f JM |
296 | |
297 | error_out: | |
298 | if (mpu->open_input && mpu->close_input) | |
299 | mpu->close_input(mpu); | |
300 | return -EIO; | |
1da177e4 LT |
301 | } |
302 | ||
e1fad17b | 303 | static int snd_mpu401_uart_output_open(struct snd_rawmidi_substream *substream) |
1da177e4 | 304 | { |
e1fad17b | 305 | struct snd_mpu401 *mpu; |
1da177e4 LT |
306 | int err; |
307 | ||
308 | mpu = substream->rmidi->private_data; | |
309 | if (mpu->open_output && (err = mpu->open_output(mpu)) < 0) | |
310 | return err; | |
311 | if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) { | |
8f7ba051 | 312 | if (snd_mpu401_do_reset(mpu) < 0) |
962f831f | 313 | goto error_out; |
1da177e4 LT |
314 | } |
315 | mpu->substream_output = substream; | |
316 | set_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode); | |
317 | return 0; | |
962f831f JM |
318 | |
319 | error_out: | |
320 | if (mpu->open_output && mpu->close_output) | |
321 | mpu->close_output(mpu); | |
322 | return -EIO; | |
1da177e4 LT |
323 | } |
324 | ||
e1fad17b | 325 | static int snd_mpu401_uart_input_close(struct snd_rawmidi_substream *substream) |
1da177e4 | 326 | { |
e1fad17b | 327 | struct snd_mpu401 *mpu; |
962f831f | 328 | int err = 0; |
1da177e4 LT |
329 | |
330 | mpu = substream->rmidi->private_data; | |
331 | clear_bit(MPU401_MODE_BIT_INPUT, &mpu->mode); | |
332 | mpu->substream_input = NULL; | |
333 | if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode)) | |
962f831f | 334 | err = snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0); |
1da177e4 LT |
335 | if (mpu->close_input) |
336 | mpu->close_input(mpu); | |
962f831f JM |
337 | if (err) |
338 | return -EIO; | |
1da177e4 LT |
339 | return 0; |
340 | } | |
341 | ||
e1fad17b | 342 | static int snd_mpu401_uart_output_close(struct snd_rawmidi_substream *substream) |
1da177e4 | 343 | { |
e1fad17b | 344 | struct snd_mpu401 *mpu; |
962f831f | 345 | int err = 0; |
1da177e4 LT |
346 | |
347 | mpu = substream->rmidi->private_data; | |
348 | clear_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode); | |
349 | mpu->substream_output = NULL; | |
350 | if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) | |
962f831f | 351 | err = snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0); |
1da177e4 LT |
352 | if (mpu->close_output) |
353 | mpu->close_output(mpu); | |
962f831f JM |
354 | if (err) |
355 | return -EIO; | |
1da177e4 LT |
356 | return 0; |
357 | } | |
358 | ||
359 | /* | |
360 | * trigger input callback | |
361 | */ | |
2851d963 TI |
362 | static void |
363 | snd_mpu401_uart_input_trigger(struct snd_rawmidi_substream *substream, int up) | |
1da177e4 LT |
364 | { |
365 | unsigned long flags; | |
e1fad17b | 366 | struct snd_mpu401 *mpu; |
1da177e4 LT |
367 | int max = 64; |
368 | ||
369 | mpu = substream->rmidi->private_data; | |
370 | if (up) { | |
2851d963 TI |
371 | if (! test_and_set_bit(MPU401_MODE_BIT_INPUT_TRIGGER, |
372 | &mpu->mode)) { | |
1da177e4 LT |
373 | /* first time - flush FIFO */ |
374 | while (max-- > 0) | |
375 | mpu->read(mpu, MPU401D(mpu)); | |
376 | if (mpu->irq < 0) | |
377 | snd_mpu401_uart_add_timer(mpu, 1); | |
378 | } | |
379 | ||
380 | /* read data in advance */ | |
381 | spin_lock_irqsave(&mpu->input_lock, flags); | |
382 | snd_mpu401_uart_input_read(mpu); | |
383 | spin_unlock_irqrestore(&mpu->input_lock, flags); | |
384 | } else { | |
385 | if (mpu->irq < 0) | |
386 | snd_mpu401_uart_remove_timer(mpu, 1); | |
387 | clear_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode); | |
388 | } | |
962f831f | 389 | |
1da177e4 LT |
390 | } |
391 | ||
392 | /* | |
393 | * transfer input pending data | |
394 | * call with input_lock spinlock held | |
395 | */ | |
e1fad17b | 396 | static void snd_mpu401_uart_input_read(struct snd_mpu401 * mpu) |
1da177e4 LT |
397 | { |
398 | int max = 128; | |
399 | unsigned char byte; | |
400 | ||
401 | while (max-- > 0) { | |
2851d963 | 402 | if (! snd_mpu401_input_avail(mpu)) |
1da177e4 | 403 | break; /* input not available */ |
2851d963 TI |
404 | byte = mpu->read(mpu, MPU401D(mpu)); |
405 | if (test_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode)) | |
406 | snd_rawmidi_receive(mpu->substream_input, &byte, 1); | |
1da177e4 LT |
407 | } |
408 | } | |
409 | ||
410 | /* | |
411 | * Tx FIFO sizes: | |
412 | * CS4237B - 16 bytes | |
413 | * AudioDrive ES1688 - 12 bytes | |
414 | * S3 SonicVibes - 8 bytes | |
415 | * SoundBlaster AWE 64 - 2 bytes (ugly hardware) | |
416 | */ | |
417 | ||
418 | /* | |
419 | * write output pending bytes | |
420 | * call with output_lock spinlock held | |
421 | */ | |
e1fad17b | 422 | static void snd_mpu401_uart_output_write(struct snd_mpu401 * mpu) |
1da177e4 LT |
423 | { |
424 | unsigned char byte; | |
425 | int max = 256, timeout; | |
426 | ||
427 | do { | |
2851d963 TI |
428 | if (snd_rawmidi_transmit_peek(mpu->substream_output, |
429 | &byte, 1) == 1) { | |
1da177e4 | 430 | for (timeout = 100; timeout > 0; timeout--) { |
2851d963 | 431 | if (snd_mpu401_output_ready(mpu)) |
1da177e4 | 432 | break; |
1da177e4 LT |
433 | } |
434 | if (timeout == 0) | |
435 | break; /* Tx FIFO full - try again later */ | |
2851d963 TI |
436 | mpu->write(mpu, byte, MPU401D(mpu)); |
437 | snd_rawmidi_transmit_ack(mpu->substream_output, 1); | |
1da177e4 LT |
438 | } else { |
439 | snd_mpu401_uart_remove_timer (mpu, 0); | |
440 | break; /* no other data - leave the tx loop */ | |
441 | } | |
442 | } while (--max > 0); | |
443 | } | |
444 | ||
445 | /* | |
446 | * output trigger callback | |
447 | */ | |
2851d963 TI |
448 | static void |
449 | snd_mpu401_uart_output_trigger(struct snd_rawmidi_substream *substream, int up) | |
1da177e4 LT |
450 | { |
451 | unsigned long flags; | |
e1fad17b | 452 | struct snd_mpu401 *mpu; |
1da177e4 LT |
453 | |
454 | mpu = substream->rmidi->private_data; | |
455 | if (up) { | |
456 | set_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode); | |
457 | ||
458 | /* try to add the timer at each output trigger, | |
459 | * since the output timer might have been removed in | |
460 | * snd_mpu401_uart_output_write(). | |
461 | */ | |
302e4c2f TI |
462 | if (! (mpu->info_flags & MPU401_INFO_TX_IRQ)) |
463 | snd_mpu401_uart_add_timer(mpu, 0); | |
1da177e4 LT |
464 | |
465 | /* output pending data */ | |
466 | spin_lock_irqsave(&mpu->output_lock, flags); | |
467 | snd_mpu401_uart_output_write(mpu); | |
468 | spin_unlock_irqrestore(&mpu->output_lock, flags); | |
469 | } else { | |
302e4c2f TI |
470 | if (! (mpu->info_flags & MPU401_INFO_TX_IRQ)) |
471 | snd_mpu401_uart_remove_timer(mpu, 0); | |
1da177e4 LT |
472 | clear_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode); |
473 | } | |
474 | } | |
475 | ||
476 | /* | |
477 | ||
478 | */ | |
479 | ||
e1fad17b | 480 | static struct snd_rawmidi_ops snd_mpu401_uart_output = |
1da177e4 LT |
481 | { |
482 | .open = snd_mpu401_uart_output_open, | |
483 | .close = snd_mpu401_uart_output_close, | |
484 | .trigger = snd_mpu401_uart_output_trigger, | |
485 | }; | |
486 | ||
e1fad17b | 487 | static struct snd_rawmidi_ops snd_mpu401_uart_input = |
1da177e4 LT |
488 | { |
489 | .open = snd_mpu401_uart_input_open, | |
490 | .close = snd_mpu401_uart_input_close, | |
491 | .trigger = snd_mpu401_uart_input_trigger, | |
492 | }; | |
493 | ||
e1fad17b | 494 | static void snd_mpu401_uart_free(struct snd_rawmidi *rmidi) |
1da177e4 | 495 | { |
e1fad17b | 496 | struct snd_mpu401 *mpu = rmidi->private_data; |
1da177e4 LT |
497 | if (mpu->irq_flags && mpu->irq >= 0) |
498 | free_irq(mpu->irq, (void *) mpu); | |
b1d5776d | 499 | release_and_free_resource(mpu->res); |
1da177e4 LT |
500 | kfree(mpu); |
501 | } | |
502 | ||
503 | /** | |
504 | * snd_mpu401_uart_new - create an MPU401-UART instance | |
505 | * @card: the card instance | |
506 | * @device: the device index, zero-based | |
507 | * @hardware: the hardware type, MPU401_HW_XXXX | |
508 | * @port: the base address of MPU401 port | |
302e4c2f | 509 | * @info_flags: bitflags MPU401_INFO_XXX |
1da177e4 LT |
510 | * @irq: the irq number, -1 if no interrupt for mpu |
511 | * @irq_flags: the irq request flags (SA_XXX), 0 if irq was already reserved. | |
512 | * @rrawmidi: the pointer to store the new rawmidi instance | |
513 | * | |
514 | * Creates a new MPU-401 instance. | |
515 | * | |
516 | * Note that the rawmidi instance is returned on the rrawmidi argument, | |
517 | * not the mpu401 instance itself. To access to the mpu401 instance, | |
e1fad17b | 518 | * cast from rawmidi->private_data (with struct snd_mpu401 magic-cast). |
1da177e4 LT |
519 | * |
520 | * Returns zero if successful, or a negative error code. | |
521 | */ | |
e1fad17b | 522 | int snd_mpu401_uart_new(struct snd_card *card, int device, |
1da177e4 | 523 | unsigned short hardware, |
302e4c2f TI |
524 | unsigned long port, |
525 | unsigned int info_flags, | |
1da177e4 | 526 | int irq, int irq_flags, |
e1fad17b | 527 | struct snd_rawmidi ** rrawmidi) |
1da177e4 | 528 | { |
e1fad17b TI |
529 | struct snd_mpu401 *mpu; |
530 | struct snd_rawmidi *rmidi; | |
302e4c2f | 531 | int in_enable, out_enable; |
1da177e4 LT |
532 | int err; |
533 | ||
534 | if (rrawmidi) | |
535 | *rrawmidi = NULL; | |
302e4c2f TI |
536 | if (! (info_flags & (MPU401_INFO_INPUT | MPU401_INFO_OUTPUT))) |
537 | info_flags |= MPU401_INFO_INPUT | MPU401_INFO_OUTPUT; | |
538 | in_enable = (info_flags & MPU401_INFO_INPUT) ? 1 : 0; | |
539 | out_enable = (info_flags & MPU401_INFO_OUTPUT) ? 1 : 0; | |
540 | if ((err = snd_rawmidi_new(card, "MPU-401U", device, | |
541 | out_enable, in_enable, &rmidi)) < 0) | |
1da177e4 | 542 | return err; |
561b220a | 543 | mpu = kzalloc(sizeof(*mpu), GFP_KERNEL); |
1da177e4 | 544 | if (mpu == NULL) { |
73e77ba0 | 545 | snd_printk(KERN_ERR "mpu401_uart: cannot allocate\n"); |
1da177e4 LT |
546 | snd_device_free(card, rmidi); |
547 | return -ENOMEM; | |
548 | } | |
549 | rmidi->private_data = mpu; | |
550 | rmidi->private_free = snd_mpu401_uart_free; | |
551 | spin_lock_init(&mpu->input_lock); | |
552 | spin_lock_init(&mpu->output_lock); | |
553 | spin_lock_init(&mpu->timer_lock); | |
554 | mpu->hardware = hardware; | |
302e4c2f | 555 | if (! (info_flags & MPU401_INFO_INTEGRATED)) { |
1da177e4 | 556 | int res_size = hardware == MPU401_HW_PC98II ? 4 : 2; |
2851d963 TI |
557 | mpu->res = request_region(port, res_size, "MPU401 UART"); |
558 | if (mpu->res == NULL) { | |
559 | snd_printk(KERN_ERR "mpu401_uart: " | |
560 | "unable to grab port 0x%lx size %d\n", | |
561 | port, res_size); | |
1da177e4 LT |
562 | snd_device_free(card, rmidi); |
563 | return -EBUSY; | |
564 | } | |
565 | } | |
302e4c2f | 566 | if (info_flags & MPU401_INFO_MMIO) { |
1da177e4 LT |
567 | mpu->write = mpu401_write_mmio; |
568 | mpu->read = mpu401_read_mmio; | |
302e4c2f | 569 | } else { |
1da177e4 LT |
570 | mpu->write = mpu401_write_port; |
571 | mpu->read = mpu401_read_port; | |
1da177e4 LT |
572 | } |
573 | mpu->port = port; | |
574 | if (hardware == MPU401_HW_PC98II) | |
575 | mpu->cport = port + 2; | |
576 | else | |
577 | mpu->cport = port + 1; | |
578 | if (irq >= 0 && irq_flags) { | |
2851d963 TI |
579 | if (request_irq(irq, snd_mpu401_uart_interrupt, irq_flags, |
580 | "MPU401 UART", (void *) mpu)) { | |
581 | snd_printk(KERN_ERR "mpu401_uart: " | |
582 | "unable to grab IRQ %d\n", irq); | |
1da177e4 LT |
583 | snd_device_free(card, rmidi); |
584 | return -EBUSY; | |
585 | } | |
586 | } | |
302e4c2f | 587 | mpu->info_flags = info_flags; |
1da177e4 LT |
588 | mpu->irq = irq; |
589 | mpu->irq_flags = irq_flags; | |
590 | if (card->shortname[0]) | |
2851d963 TI |
591 | snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI", |
592 | card->shortname); | |
1da177e4 | 593 | else |
2851d963 | 594 | sprintf(rmidi->name, "MPU-401 MIDI %d-%d",card->number, device); |
302e4c2f TI |
595 | if (out_enable) { |
596 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, | |
597 | &snd_mpu401_uart_output); | |
598 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; | |
599 | } | |
600 | if (in_enable) { | |
601 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, | |
602 | &snd_mpu401_uart_input); | |
603 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; | |
604 | if (out_enable) | |
605 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; | |
606 | } | |
1da177e4 LT |
607 | mpu->rmidi = rmidi; |
608 | if (rrawmidi) | |
609 | *rrawmidi = rmidi; | |
610 | return 0; | |
611 | } | |
612 | ||
1da177e4 LT |
613 | EXPORT_SYMBOL(snd_mpu401_uart_new); |
614 | ||
615 | /* | |
616 | * INIT part | |
617 | */ | |
618 | ||
619 | static int __init alsa_mpu401_uart_init(void) | |
620 | { | |
621 | return 0; | |
622 | } | |
623 | ||
624 | static void __exit alsa_mpu401_uart_exit(void) | |
625 | { | |
626 | } | |
627 | ||
628 | module_init(alsa_mpu401_uart_init) | |
629 | module_exit(alsa_mpu401_uart_exit) |