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 | ||
1da177e4 LT |
31 | #include <asm/io.h> |
32 | #include <linux/delay.h> | |
33 | #include <linux/init.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/ioport.h> | |
36 | #include <linux/interrupt.h> | |
37 | #include <linux/errno.h> | |
38 | #include <sound/core.h> | |
39 | #include <sound/mpu401.h> | |
40 | ||
c1017a4c | 41 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); |
1da177e4 LT |
42 | MODULE_DESCRIPTION("Routines for control of MPU-401 in UART mode"); |
43 | MODULE_LICENSE("GPL"); | |
44 | ||
e1fad17b TI |
45 | static void snd_mpu401_uart_input_read(struct snd_mpu401 * mpu); |
46 | static void snd_mpu401_uart_output_write(struct snd_mpu401 * mpu); | |
1da177e4 LT |
47 | |
48 | /* | |
49 | ||
50 | */ | |
51 | ||
b415ed45 TI |
52 | #define snd_mpu401_input_avail(mpu) \ |
53 | (!(mpu->read(mpu, MPU401C(mpu)) & MPU401_RX_EMPTY)) | |
54 | #define snd_mpu401_output_ready(mpu) \ | |
55 | (!(mpu->read(mpu, MPU401C(mpu)) & MPU401_TX_FULL)) | |
1da177e4 LT |
56 | |
57 | /* Build in lowlevel io */ | |
2851d963 TI |
58 | static void mpu401_write_port(struct snd_mpu401 *mpu, unsigned char data, |
59 | unsigned long addr) | |
1da177e4 LT |
60 | { |
61 | outb(data, addr); | |
62 | } | |
63 | ||
2851d963 TI |
64 | static unsigned char mpu401_read_port(struct snd_mpu401 *mpu, |
65 | unsigned long addr) | |
1da177e4 LT |
66 | { |
67 | return inb(addr); | |
68 | } | |
69 | ||
2851d963 TI |
70 | static void mpu401_write_mmio(struct snd_mpu401 *mpu, unsigned char data, |
71 | unsigned long addr) | |
1da177e4 LT |
72 | { |
73 | writeb(data, (void __iomem *)addr); | |
74 | } | |
75 | ||
2851d963 TI |
76 | static unsigned char mpu401_read_mmio(struct snd_mpu401 *mpu, |
77 | unsigned long addr) | |
1da177e4 LT |
78 | { |
79 | return readb((void __iomem *)addr); | |
80 | } | |
81 | /* */ | |
82 | ||
e1fad17b | 83 | static void snd_mpu401_uart_clear_rx(struct snd_mpu401 *mpu) |
1da177e4 LT |
84 | { |
85 | int timeout = 100000; | |
86 | for (; timeout > 0 && snd_mpu401_input_avail(mpu); timeout--) | |
87 | mpu->read(mpu, MPU401D(mpu)); | |
88 | #ifdef CONFIG_SND_DEBUG | |
89 | if (timeout <= 0) | |
2851d963 TI |
90 | snd_printk(KERN_ERR "cmd: clear rx timeout (status = 0x%x)\n", |
91 | mpu->read(mpu, MPU401C(mpu))); | |
1da177e4 LT |
92 | #endif |
93 | } | |
94 | ||
302e4c2f | 95 | static void uart_interrupt_tx(struct snd_mpu401 *mpu) |
1da177e4 | 96 | { |
60fac85f CL |
97 | unsigned long flags; |
98 | ||
1da177e4 LT |
99 | if (test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode) && |
100 | test_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode)) { | |
60fac85f | 101 | spin_lock_irqsave(&mpu->output_lock, flags); |
1da177e4 | 102 | snd_mpu401_uart_output_write(mpu); |
60fac85f | 103 | spin_unlock_irqrestore(&mpu->output_lock, flags); |
1da177e4 LT |
104 | } |
105 | } | |
106 | ||
302e4c2f TI |
107 | static void _snd_mpu401_uart_interrupt(struct snd_mpu401 *mpu) |
108 | { | |
60fac85f CL |
109 | unsigned long flags; |
110 | ||
302e4c2f | 111 | if (mpu->info_flags & MPU401_INFO_INPUT) { |
60fac85f | 112 | spin_lock_irqsave(&mpu->input_lock, flags); |
302e4c2f TI |
113 | if (test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) |
114 | snd_mpu401_uart_input_read(mpu); | |
115 | else | |
116 | snd_mpu401_uart_clear_rx(mpu); | |
60fac85f | 117 | spin_unlock_irqrestore(&mpu->input_lock, flags); |
302e4c2f TI |
118 | } |
119 | if (! (mpu->info_flags & MPU401_INFO_TX_IRQ)) | |
120 | /* ok. for better Tx performance try do some output | |
121 | when input is done */ | |
122 | uart_interrupt_tx(mpu); | |
123 | } | |
124 | ||
1da177e4 LT |
125 | /** |
126 | * snd_mpu401_uart_interrupt - generic MPU401-UART interrupt handler | |
127 | * @irq: the irq number | |
128 | * @dev_id: mpu401 instance | |
1da177e4 LT |
129 | * |
130 | * Processes the interrupt for MPU401-UART i/o. | |
131 | */ | |
7d12e780 | 132 | irqreturn_t snd_mpu401_uart_interrupt(int irq, void *dev_id) |
1da177e4 | 133 | { |
e1fad17b | 134 | struct snd_mpu401 *mpu = dev_id; |
1da177e4 LT |
135 | |
136 | if (mpu == NULL) | |
137 | return IRQ_NONE; | |
138 | _snd_mpu401_uart_interrupt(mpu); | |
139 | return IRQ_HANDLED; | |
140 | } | |
141 | ||
2851d963 TI |
142 | EXPORT_SYMBOL(snd_mpu401_uart_interrupt); |
143 | ||
302e4c2f TI |
144 | /** |
145 | * snd_mpu401_uart_interrupt_tx - generic MPU401-UART transmit irq handler | |
146 | * @irq: the irq number | |
147 | * @dev_id: mpu401 instance | |
302e4c2f TI |
148 | * |
149 | * Processes the interrupt for MPU401-UART output. | |
150 | */ | |
7d12e780 | 151 | irqreturn_t snd_mpu401_uart_interrupt_tx(int irq, void *dev_id) |
302e4c2f TI |
152 | { |
153 | struct snd_mpu401 *mpu = dev_id; | |
154 | ||
155 | if (mpu == NULL) | |
156 | return IRQ_NONE; | |
157 | uart_interrupt_tx(mpu); | |
158 | return IRQ_HANDLED; | |
159 | } | |
160 | ||
161 | EXPORT_SYMBOL(snd_mpu401_uart_interrupt_tx); | |
162 | ||
1da177e4 LT |
163 | /* |
164 | * timer callback | |
165 | * reprogram the timer and call the interrupt job | |
166 | */ | |
167 | static void snd_mpu401_uart_timer(unsigned long data) | |
168 | { | |
e1fad17b | 169 | struct snd_mpu401 *mpu = (struct snd_mpu401 *)data; |
b32425ac | 170 | unsigned long flags; |
1da177e4 | 171 | |
b32425ac | 172 | spin_lock_irqsave(&mpu->timer_lock, flags); |
1da177e4 LT |
173 | /*mpu->mode |= MPU401_MODE_TIMER;*/ |
174 | mpu->timer.expires = 1 + jiffies; | |
175 | add_timer(&mpu->timer); | |
b32425ac | 176 | spin_unlock_irqrestore(&mpu->timer_lock, flags); |
1da177e4 LT |
177 | if (mpu->rmidi) |
178 | _snd_mpu401_uart_interrupt(mpu); | |
179 | } | |
180 | ||
181 | /* | |
182 | * initialize the timer callback if not programmed yet | |
183 | */ | |
e1fad17b | 184 | static void snd_mpu401_uart_add_timer (struct snd_mpu401 *mpu, int input) |
1da177e4 LT |
185 | { |
186 | unsigned long flags; | |
187 | ||
188 | spin_lock_irqsave (&mpu->timer_lock, flags); | |
189 | if (mpu->timer_invoked == 0) { | |
190 | init_timer(&mpu->timer); | |
191 | mpu->timer.data = (unsigned long)mpu; | |
192 | mpu->timer.function = snd_mpu401_uart_timer; | |
193 | mpu->timer.expires = 1 + jiffies; | |
194 | add_timer(&mpu->timer); | |
195 | } | |
2851d963 TI |
196 | mpu->timer_invoked |= input ? MPU401_MODE_INPUT_TIMER : |
197 | MPU401_MODE_OUTPUT_TIMER; | |
1da177e4 LT |
198 | spin_unlock_irqrestore (&mpu->timer_lock, flags); |
199 | } | |
200 | ||
201 | /* | |
202 | * remove the timer callback if still active | |
203 | */ | |
e1fad17b | 204 | static void snd_mpu401_uart_remove_timer (struct snd_mpu401 *mpu, int input) |
1da177e4 LT |
205 | { |
206 | unsigned long flags; | |
207 | ||
208 | spin_lock_irqsave (&mpu->timer_lock, flags); | |
209 | if (mpu->timer_invoked) { | |
2851d963 TI |
210 | mpu->timer_invoked &= input ? ~MPU401_MODE_INPUT_TIMER : |
211 | ~MPU401_MODE_OUTPUT_TIMER; | |
1da177e4 LT |
212 | if (! mpu->timer_invoked) |
213 | del_timer(&mpu->timer); | |
214 | } | |
215 | spin_unlock_irqrestore (&mpu->timer_lock, flags); | |
216 | } | |
217 | ||
218 | /* | |
2851d963 TI |
219 | * send a UART command |
220 | * return zero if successful, non-zero for some errors | |
1da177e4 LT |
221 | */ |
222 | ||
962f831f | 223 | static int snd_mpu401_uart_cmd(struct snd_mpu401 * mpu, unsigned char cmd, |
2851d963 | 224 | int ack) |
1da177e4 LT |
225 | { |
226 | unsigned long flags; | |
227 | int timeout, ok; | |
228 | ||
229 | spin_lock_irqsave(&mpu->input_lock, flags); | |
230 | if (mpu->hardware != MPU401_HW_TRID4DWAVE) { | |
231 | mpu->write(mpu, 0x00, MPU401D(mpu)); | |
232 | /*snd_mpu401_uart_clear_rx(mpu);*/ | |
233 | } | |
234 | /* ok. standard MPU-401 initialization */ | |
235 | if (mpu->hardware != MPU401_HW_SB) { | |
2851d963 TI |
236 | for (timeout = 1000; timeout > 0 && |
237 | !snd_mpu401_output_ready(mpu); timeout--) | |
1da177e4 LT |
238 | udelay(10); |
239 | #ifdef CONFIG_SND_DEBUG | |
240 | if (!timeout) | |
2851d963 TI |
241 | snd_printk(KERN_ERR "cmd: tx timeout (status = 0x%x)\n", |
242 | mpu->read(mpu, MPU401C(mpu))); | |
1da177e4 LT |
243 | #endif |
244 | } | |
245 | mpu->write(mpu, cmd, MPU401C(mpu)); | |
246 | if (ack) { | |
247 | ok = 0; | |
248 | timeout = 10000; | |
249 | while (!ok && timeout-- > 0) { | |
250 | if (snd_mpu401_input_avail(mpu)) { | |
251 | if (mpu->read(mpu, MPU401D(mpu)) == MPU401_ACK) | |
252 | ok = 1; | |
253 | } | |
254 | } | |
255 | if (!ok && mpu->read(mpu, MPU401D(mpu)) == MPU401_ACK) | |
256 | ok = 1; | |
2851d963 | 257 | } else |
1da177e4 | 258 | ok = 1; |
1da177e4 | 259 | spin_unlock_irqrestore(&mpu->input_lock, flags); |
962f831f | 260 | if (!ok) { |
2851d963 TI |
261 | snd_printk(KERN_ERR "cmd: 0x%x failed at 0x%lx " |
262 | "(status = 0x%x, data = 0x%x)\n", cmd, mpu->port, | |
263 | mpu->read(mpu, MPU401C(mpu)), | |
264 | mpu->read(mpu, MPU401D(mpu))); | |
962f831f JM |
265 | return 1; |
266 | } | |
267 | return 0; | |
1da177e4 LT |
268 | } |
269 | ||
8f7ba051 TI |
270 | static int snd_mpu401_do_reset(struct snd_mpu401 *mpu) |
271 | { | |
272 | if (snd_mpu401_uart_cmd(mpu, MPU401_RESET, 1)) | |
273 | return -EIO; | |
c1099fcb | 274 | if (snd_mpu401_uart_cmd(mpu, MPU401_ENTER_UART, 0)) |
8f7ba051 TI |
275 | return -EIO; |
276 | return 0; | |
277 | } | |
278 | ||
1da177e4 LT |
279 | /* |
280 | * input/output open/close - protected by open_mutex in rawmidi.c | |
281 | */ | |
e1fad17b | 282 | static int snd_mpu401_uart_input_open(struct snd_rawmidi_substream *substream) |
1da177e4 | 283 | { |
e1fad17b | 284 | struct snd_mpu401 *mpu; |
1da177e4 LT |
285 | int err; |
286 | ||
287 | mpu = substream->rmidi->private_data; | |
288 | if (mpu->open_input && (err = mpu->open_input(mpu)) < 0) | |
289 | return err; | |
290 | if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode)) { | |
8f7ba051 | 291 | if (snd_mpu401_do_reset(mpu) < 0) |
962f831f | 292 | goto error_out; |
1da177e4 LT |
293 | } |
294 | mpu->substream_input = substream; | |
295 | set_bit(MPU401_MODE_BIT_INPUT, &mpu->mode); | |
296 | return 0; | |
962f831f JM |
297 | |
298 | error_out: | |
299 | if (mpu->open_input && mpu->close_input) | |
300 | mpu->close_input(mpu); | |
301 | return -EIO; | |
1da177e4 LT |
302 | } |
303 | ||
e1fad17b | 304 | static int snd_mpu401_uart_output_open(struct snd_rawmidi_substream *substream) |
1da177e4 | 305 | { |
e1fad17b | 306 | struct snd_mpu401 *mpu; |
1da177e4 LT |
307 | int err; |
308 | ||
309 | mpu = substream->rmidi->private_data; | |
310 | if (mpu->open_output && (err = mpu->open_output(mpu)) < 0) | |
311 | return err; | |
312 | if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) { | |
8f7ba051 | 313 | if (snd_mpu401_do_reset(mpu) < 0) |
962f831f | 314 | goto error_out; |
1da177e4 LT |
315 | } |
316 | mpu->substream_output = substream; | |
317 | set_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode); | |
318 | return 0; | |
962f831f JM |
319 | |
320 | error_out: | |
321 | if (mpu->open_output && mpu->close_output) | |
322 | mpu->close_output(mpu); | |
323 | return -EIO; | |
1da177e4 LT |
324 | } |
325 | ||
e1fad17b | 326 | static int snd_mpu401_uart_input_close(struct snd_rawmidi_substream *substream) |
1da177e4 | 327 | { |
e1fad17b | 328 | struct snd_mpu401 *mpu; |
962f831f | 329 | int err = 0; |
1da177e4 LT |
330 | |
331 | mpu = substream->rmidi->private_data; | |
332 | clear_bit(MPU401_MODE_BIT_INPUT, &mpu->mode); | |
333 | mpu->substream_input = NULL; | |
334 | if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode)) | |
962f831f | 335 | err = snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0); |
1da177e4 LT |
336 | if (mpu->close_input) |
337 | mpu->close_input(mpu); | |
962f831f JM |
338 | if (err) |
339 | return -EIO; | |
1da177e4 LT |
340 | return 0; |
341 | } | |
342 | ||
e1fad17b | 343 | static int snd_mpu401_uart_output_close(struct snd_rawmidi_substream *substream) |
1da177e4 | 344 | { |
e1fad17b | 345 | struct snd_mpu401 *mpu; |
962f831f | 346 | int err = 0; |
1da177e4 LT |
347 | |
348 | mpu = substream->rmidi->private_data; | |
349 | clear_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode); | |
350 | mpu->substream_output = NULL; | |
351 | if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) | |
962f831f | 352 | err = snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0); |
1da177e4 LT |
353 | if (mpu->close_output) |
354 | mpu->close_output(mpu); | |
962f831f JM |
355 | if (err) |
356 | return -EIO; | |
1da177e4 LT |
357 | return 0; |
358 | } | |
359 | ||
360 | /* | |
361 | * trigger input callback | |
362 | */ | |
2851d963 TI |
363 | static void |
364 | snd_mpu401_uart_input_trigger(struct snd_rawmidi_substream *substream, int up) | |
1da177e4 LT |
365 | { |
366 | unsigned long flags; | |
e1fad17b | 367 | struct snd_mpu401 *mpu; |
1da177e4 LT |
368 | int max = 64; |
369 | ||
370 | mpu = substream->rmidi->private_data; | |
371 | if (up) { | |
2851d963 TI |
372 | if (! test_and_set_bit(MPU401_MODE_BIT_INPUT_TRIGGER, |
373 | &mpu->mode)) { | |
1da177e4 LT |
374 | /* first time - flush FIFO */ |
375 | while (max-- > 0) | |
376 | mpu->read(mpu, MPU401D(mpu)); | |
377 | if (mpu->irq < 0) | |
378 | snd_mpu401_uart_add_timer(mpu, 1); | |
379 | } | |
380 | ||
381 | /* read data in advance */ | |
382 | spin_lock_irqsave(&mpu->input_lock, flags); | |
383 | snd_mpu401_uart_input_read(mpu); | |
384 | spin_unlock_irqrestore(&mpu->input_lock, flags); | |
385 | } else { | |
386 | if (mpu->irq < 0) | |
387 | snd_mpu401_uart_remove_timer(mpu, 1); | |
388 | clear_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode); | |
389 | } | |
962f831f | 390 | |
1da177e4 LT |
391 | } |
392 | ||
393 | /* | |
394 | * transfer input pending data | |
395 | * call with input_lock spinlock held | |
396 | */ | |
e1fad17b | 397 | static void snd_mpu401_uart_input_read(struct snd_mpu401 * mpu) |
1da177e4 LT |
398 | { |
399 | int max = 128; | |
400 | unsigned char byte; | |
401 | ||
402 | while (max-- > 0) { | |
2851d963 | 403 | if (! snd_mpu401_input_avail(mpu)) |
1da177e4 | 404 | break; /* input not available */ |
2851d963 TI |
405 | byte = mpu->read(mpu, MPU401D(mpu)); |
406 | if (test_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode)) | |
407 | snd_rawmidi_receive(mpu->substream_input, &byte, 1); | |
1da177e4 LT |
408 | } |
409 | } | |
410 | ||
411 | /* | |
412 | * Tx FIFO sizes: | |
413 | * CS4237B - 16 bytes | |
414 | * AudioDrive ES1688 - 12 bytes | |
415 | * S3 SonicVibes - 8 bytes | |
416 | * SoundBlaster AWE 64 - 2 bytes (ugly hardware) | |
417 | */ | |
418 | ||
419 | /* | |
420 | * write output pending bytes | |
421 | * call with output_lock spinlock held | |
422 | */ | |
e1fad17b | 423 | static void snd_mpu401_uart_output_write(struct snd_mpu401 * mpu) |
1da177e4 LT |
424 | { |
425 | unsigned char byte; | |
ea6b5828 | 426 | int max = 256; |
1da177e4 LT |
427 | |
428 | do { | |
2851d963 TI |
429 | if (snd_rawmidi_transmit_peek(mpu->substream_output, |
430 | &byte, 1) == 1) { | |
ea6b5828 CL |
431 | /* |
432 | * Try twice because there is hardware that insists on | |
433 | * setting the output busy bit after each write. | |
434 | */ | |
435 | if (!snd_mpu401_output_ready(mpu) && | |
436 | !snd_mpu401_output_ready(mpu)) | |
1da177e4 | 437 | break; /* Tx FIFO full - try again later */ |
2851d963 TI |
438 | mpu->write(mpu, byte, MPU401D(mpu)); |
439 | snd_rawmidi_transmit_ack(mpu->substream_output, 1); | |
1da177e4 LT |
440 | } else { |
441 | snd_mpu401_uart_remove_timer (mpu, 0); | |
442 | break; /* no other data - leave the tx loop */ | |
443 | } | |
444 | } while (--max > 0); | |
445 | } | |
446 | ||
447 | /* | |
448 | * output trigger callback | |
449 | */ | |
2851d963 TI |
450 | static void |
451 | snd_mpu401_uart_output_trigger(struct snd_rawmidi_substream *substream, int up) | |
1da177e4 LT |
452 | { |
453 | unsigned long flags; | |
e1fad17b | 454 | struct snd_mpu401 *mpu; |
1da177e4 LT |
455 | |
456 | mpu = substream->rmidi->private_data; | |
457 | if (up) { | |
458 | set_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode); | |
459 | ||
460 | /* try to add the timer at each output trigger, | |
461 | * since the output timer might have been removed in | |
462 | * snd_mpu401_uart_output_write(). | |
463 | */ | |
302e4c2f TI |
464 | if (! (mpu->info_flags & MPU401_INFO_TX_IRQ)) |
465 | snd_mpu401_uart_add_timer(mpu, 0); | |
1da177e4 LT |
466 | |
467 | /* output pending data */ | |
468 | spin_lock_irqsave(&mpu->output_lock, flags); | |
469 | snd_mpu401_uart_output_write(mpu); | |
470 | spin_unlock_irqrestore(&mpu->output_lock, flags); | |
471 | } else { | |
302e4c2f TI |
472 | if (! (mpu->info_flags & MPU401_INFO_TX_IRQ)) |
473 | snd_mpu401_uart_remove_timer(mpu, 0); | |
1da177e4 LT |
474 | clear_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode); |
475 | } | |
476 | } | |
477 | ||
478 | /* | |
479 | ||
480 | */ | |
481 | ||
e1fad17b | 482 | static struct snd_rawmidi_ops snd_mpu401_uart_output = |
1da177e4 LT |
483 | { |
484 | .open = snd_mpu401_uart_output_open, | |
485 | .close = snd_mpu401_uart_output_close, | |
486 | .trigger = snd_mpu401_uart_output_trigger, | |
487 | }; | |
488 | ||
e1fad17b | 489 | static struct snd_rawmidi_ops snd_mpu401_uart_input = |
1da177e4 LT |
490 | { |
491 | .open = snd_mpu401_uart_input_open, | |
492 | .close = snd_mpu401_uart_input_close, | |
493 | .trigger = snd_mpu401_uart_input_trigger, | |
494 | }; | |
495 | ||
e1fad17b | 496 | static void snd_mpu401_uart_free(struct snd_rawmidi *rmidi) |
1da177e4 | 497 | { |
e1fad17b | 498 | struct snd_mpu401 *mpu = rmidi->private_data; |
1da177e4 LT |
499 | if (mpu->irq_flags && mpu->irq >= 0) |
500 | free_irq(mpu->irq, (void *) mpu); | |
b1d5776d | 501 | release_and_free_resource(mpu->res); |
1da177e4 LT |
502 | kfree(mpu); |
503 | } | |
504 | ||
505 | /** | |
506 | * snd_mpu401_uart_new - create an MPU401-UART instance | |
507 | * @card: the card instance | |
508 | * @device: the device index, zero-based | |
509 | * @hardware: the hardware type, MPU401_HW_XXXX | |
510 | * @port: the base address of MPU401 port | |
302e4c2f | 511 | * @info_flags: bitflags MPU401_INFO_XXX |
1da177e4 LT |
512 | * @irq: the irq number, -1 if no interrupt for mpu |
513 | * @irq_flags: the irq request flags (SA_XXX), 0 if irq was already reserved. | |
514 | * @rrawmidi: the pointer to store the new rawmidi instance | |
515 | * | |
516 | * Creates a new MPU-401 instance. | |
517 | * | |
518 | * Note that the rawmidi instance is returned on the rrawmidi argument, | |
519 | * not the mpu401 instance itself. To access to the mpu401 instance, | |
e1fad17b | 520 | * cast from rawmidi->private_data (with struct snd_mpu401 magic-cast). |
1da177e4 LT |
521 | * |
522 | * Returns zero if successful, or a negative error code. | |
523 | */ | |
e1fad17b | 524 | int snd_mpu401_uart_new(struct snd_card *card, int device, |
1da177e4 | 525 | unsigned short hardware, |
302e4c2f TI |
526 | unsigned long port, |
527 | unsigned int info_flags, | |
1da177e4 | 528 | int irq, int irq_flags, |
e1fad17b | 529 | struct snd_rawmidi ** rrawmidi) |
1da177e4 | 530 | { |
e1fad17b TI |
531 | struct snd_mpu401 *mpu; |
532 | struct snd_rawmidi *rmidi; | |
302e4c2f | 533 | int in_enable, out_enable; |
1da177e4 LT |
534 | int err; |
535 | ||
536 | if (rrawmidi) | |
537 | *rrawmidi = NULL; | |
302e4c2f TI |
538 | if (! (info_flags & (MPU401_INFO_INPUT | MPU401_INFO_OUTPUT))) |
539 | info_flags |= MPU401_INFO_INPUT | MPU401_INFO_OUTPUT; | |
540 | in_enable = (info_flags & MPU401_INFO_INPUT) ? 1 : 0; | |
541 | out_enable = (info_flags & MPU401_INFO_OUTPUT) ? 1 : 0; | |
542 | if ((err = snd_rawmidi_new(card, "MPU-401U", device, | |
543 | out_enable, in_enable, &rmidi)) < 0) | |
1da177e4 | 544 | return err; |
561b220a | 545 | mpu = kzalloc(sizeof(*mpu), GFP_KERNEL); |
1da177e4 | 546 | if (mpu == NULL) { |
73e77ba0 | 547 | snd_printk(KERN_ERR "mpu401_uart: cannot allocate\n"); |
1da177e4 LT |
548 | snd_device_free(card, rmidi); |
549 | return -ENOMEM; | |
550 | } | |
551 | rmidi->private_data = mpu; | |
552 | rmidi->private_free = snd_mpu401_uart_free; | |
553 | spin_lock_init(&mpu->input_lock); | |
554 | spin_lock_init(&mpu->output_lock); | |
555 | spin_lock_init(&mpu->timer_lock); | |
556 | mpu->hardware = hardware; | |
302e4c2f | 557 | if (! (info_flags & MPU401_INFO_INTEGRATED)) { |
1da177e4 | 558 | int res_size = hardware == MPU401_HW_PC98II ? 4 : 2; |
2851d963 TI |
559 | mpu->res = request_region(port, res_size, "MPU401 UART"); |
560 | if (mpu->res == NULL) { | |
561 | snd_printk(KERN_ERR "mpu401_uart: " | |
562 | "unable to grab port 0x%lx size %d\n", | |
563 | port, res_size); | |
1da177e4 LT |
564 | snd_device_free(card, rmidi); |
565 | return -EBUSY; | |
566 | } | |
567 | } | |
302e4c2f | 568 | if (info_flags & MPU401_INFO_MMIO) { |
1da177e4 LT |
569 | mpu->write = mpu401_write_mmio; |
570 | mpu->read = mpu401_read_mmio; | |
302e4c2f | 571 | } else { |
1da177e4 LT |
572 | mpu->write = mpu401_write_port; |
573 | mpu->read = mpu401_read_port; | |
1da177e4 LT |
574 | } |
575 | mpu->port = port; | |
576 | if (hardware == MPU401_HW_PC98II) | |
577 | mpu->cport = port + 2; | |
578 | else | |
579 | mpu->cport = port + 1; | |
580 | if (irq >= 0 && irq_flags) { | |
2851d963 TI |
581 | if (request_irq(irq, snd_mpu401_uart_interrupt, irq_flags, |
582 | "MPU401 UART", (void *) mpu)) { | |
583 | snd_printk(KERN_ERR "mpu401_uart: " | |
584 | "unable to grab IRQ %d\n", irq); | |
1da177e4 LT |
585 | snd_device_free(card, rmidi); |
586 | return -EBUSY; | |
587 | } | |
588 | } | |
302e4c2f | 589 | mpu->info_flags = info_flags; |
1da177e4 LT |
590 | mpu->irq = irq; |
591 | mpu->irq_flags = irq_flags; | |
592 | if (card->shortname[0]) | |
2851d963 TI |
593 | snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI", |
594 | card->shortname); | |
1da177e4 | 595 | else |
2851d963 | 596 | sprintf(rmidi->name, "MPU-401 MIDI %d-%d",card->number, device); |
302e4c2f TI |
597 | if (out_enable) { |
598 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, | |
599 | &snd_mpu401_uart_output); | |
600 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; | |
601 | } | |
602 | if (in_enable) { | |
603 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, | |
604 | &snd_mpu401_uart_input); | |
605 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; | |
606 | if (out_enable) | |
607 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; | |
608 | } | |
1da177e4 LT |
609 | mpu->rmidi = rmidi; |
610 | if (rrawmidi) | |
611 | *rrawmidi = rmidi; | |
612 | return 0; | |
613 | } | |
614 | ||
1da177e4 LT |
615 | EXPORT_SYMBOL(snd_mpu401_uart_new); |
616 | ||
617 | /* | |
618 | * INIT part | |
619 | */ | |
620 | ||
621 | static int __init alsa_mpu401_uart_init(void) | |
622 | { | |
623 | return 0; | |
624 | } | |
625 | ||
626 | static void __exit alsa_mpu401_uart_exit(void) | |
627 | { | |
628 | } | |
629 | ||
630 | module_init(alsa_mpu401_uart_init) | |
631 | module_exit(alsa_mpu401_uart_exit) |