1 /*
2 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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. Without interrupt,
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 <linux/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/module.h>
37 #include <linux/interrupt.h>
38 #include <linux/errno.h>
39 #include <sound/core.h>
40 #include <sound/mpu401.h>
41
42 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
43 MODULE_DESCRIPTION("Routines for control of MPU-401 in UART mode");
44 MODULE_LICENSE("GPL");
45
46 static void snd_mpu401_uart_input_read(struct snd_mpu401 * mpu);
47 static void snd_mpu401_uart_output_write(struct snd_mpu401 * mpu);
48
49 /*
50
51 */
52
53 #define snd_mpu401_input_avail(mpu) \
54 (!(mpu->read(mpu, MPU401C(mpu)) & MPU401_RX_EMPTY))
55 #define snd_mpu401_output_ready(mpu) \
56 (!(mpu->read(mpu, MPU401C(mpu)) & MPU401_TX_FULL))
57
58 /* Build in lowlevel io */
mpu401_write_port(struct snd_mpu401 * mpu,unsigned char data,unsigned long addr)59 static void mpu401_write_port(struct snd_mpu401 *mpu, unsigned char data,
60 unsigned long addr)
61 {
62 outb(data, addr);
63 }
64
mpu401_read_port(struct snd_mpu401 * mpu,unsigned long addr)65 static unsigned char mpu401_read_port(struct snd_mpu401 *mpu,
66 unsigned long addr)
67 {
68 return inb(addr);
69 }
70
mpu401_write_mmio(struct snd_mpu401 * mpu,unsigned char data,unsigned long addr)71 static void mpu401_write_mmio(struct snd_mpu401 *mpu, unsigned char data,
72 unsigned long addr)
73 {
74 writeb(data, (void __iomem *)addr);
75 }
76
mpu401_read_mmio(struct snd_mpu401 * mpu,unsigned long addr)77 static unsigned char mpu401_read_mmio(struct snd_mpu401 *mpu,
78 unsigned long addr)
79 {
80 return readb((void __iomem *)addr);
81 }
82 /* */
83
snd_mpu401_uart_clear_rx(struct snd_mpu401 * mpu)84 static void snd_mpu401_uart_clear_rx(struct snd_mpu401 *mpu)
85 {
86 int timeout = 100000;
87 for (; timeout > 0 && snd_mpu401_input_avail(mpu); timeout--)
88 mpu->read(mpu, MPU401D(mpu));
89 #ifdef CONFIG_SND_DEBUG
90 if (timeout <= 0)
91 snd_printk(KERN_ERR "cmd: clear rx timeout (status = 0x%x)\n",
92 mpu->read(mpu, MPU401C(mpu)));
93 #endif
94 }
95
uart_interrupt_tx(struct snd_mpu401 * mpu)96 static void uart_interrupt_tx(struct snd_mpu401 *mpu)
97 {
98 unsigned long flags;
99
100 if (test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode) &&
101 test_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode)) {
102 spin_lock_irqsave(&mpu->output_lock, flags);
103 snd_mpu401_uart_output_write(mpu);
104 spin_unlock_irqrestore(&mpu->output_lock, flags);
105 }
106 }
107
_snd_mpu401_uart_interrupt(struct snd_mpu401 * mpu)108 static void _snd_mpu401_uart_interrupt(struct snd_mpu401 *mpu)
109 {
110 unsigned long flags;
111
112 if (mpu->info_flags & MPU401_INFO_INPUT) {
113 spin_lock_irqsave(&mpu->input_lock, flags);
114 if (test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode))
115 snd_mpu401_uart_input_read(mpu);
116 else
117 snd_mpu401_uart_clear_rx(mpu);
118 spin_unlock_irqrestore(&mpu->input_lock, flags);
119 }
120 if (! (mpu->info_flags & MPU401_INFO_TX_IRQ))
121 /* ok. for better Tx performance try do some output
122 when input is done */
123 uart_interrupt_tx(mpu);
124 }
125
126 /**
127 * snd_mpu401_uart_interrupt - generic MPU401-UART interrupt handler
128 * @irq: the irq number
129 * @dev_id: mpu401 instance
130 *
131 * Processes the interrupt for MPU401-UART i/o.
132 *
133 * Return: %IRQ_HANDLED if the interrupt was handled. %IRQ_NONE otherwise.
134 */
snd_mpu401_uart_interrupt(int irq,void * dev_id)135 irqreturn_t snd_mpu401_uart_interrupt(int irq, void *dev_id)
136 {
137 struct snd_mpu401 *mpu = dev_id;
138
139 if (!mpu)
140 return IRQ_NONE;
141 _snd_mpu401_uart_interrupt(mpu);
142 return IRQ_HANDLED;
143 }
144
145 EXPORT_SYMBOL(snd_mpu401_uart_interrupt);
146
147 /**
148 * snd_mpu401_uart_interrupt_tx - generic MPU401-UART transmit irq handler
149 * @irq: the irq number
150 * @dev_id: mpu401 instance
151 *
152 * Processes the interrupt for MPU401-UART output.
153 *
154 * Return: %IRQ_HANDLED if the interrupt was handled. %IRQ_NONE otherwise.
155 */
snd_mpu401_uart_interrupt_tx(int irq,void * dev_id)156 irqreturn_t snd_mpu401_uart_interrupt_tx(int irq, void *dev_id)
157 {
158 struct snd_mpu401 *mpu = dev_id;
159
160 if (!mpu)
161 return IRQ_NONE;
162 uart_interrupt_tx(mpu);
163 return IRQ_HANDLED;
164 }
165
166 EXPORT_SYMBOL(snd_mpu401_uart_interrupt_tx);
167
168 /*
169 * timer callback
170 * reprogram the timer and call the interrupt job
171 */
snd_mpu401_uart_timer(struct timer_list * t)172 static void snd_mpu401_uart_timer(struct timer_list *t)
173 {
174 struct snd_mpu401 *mpu = from_timer(mpu, t, timer);
175 unsigned long flags;
176
177 spin_lock_irqsave(&mpu->timer_lock, flags);
178 /*mpu->mode |= MPU401_MODE_TIMER;*/
179 mod_timer(&mpu->timer, 1 + jiffies);
180 spin_unlock_irqrestore(&mpu->timer_lock, flags);
181 if (mpu->rmidi)
182 _snd_mpu401_uart_interrupt(mpu);
183 }
184
185 /*
186 * initialize the timer callback if not programmed yet
187 */
snd_mpu401_uart_add_timer(struct snd_mpu401 * mpu,int input)188 static void snd_mpu401_uart_add_timer (struct snd_mpu401 *mpu, int input)
189 {
190 unsigned long flags;
191
192 spin_lock_irqsave (&mpu->timer_lock, flags);
193 if (mpu->timer_invoked == 0) {
194 timer_setup(&mpu->timer, snd_mpu401_uart_timer, 0);
195 mod_timer(&mpu->timer, 1 + jiffies);
196 }
197 mpu->timer_invoked |= input ? MPU401_MODE_INPUT_TIMER :
198 MPU401_MODE_OUTPUT_TIMER;
199 spin_unlock_irqrestore (&mpu->timer_lock, flags);
200 }
201
202 /*
203 * remove the timer callback if still active
204 */
snd_mpu401_uart_remove_timer(struct snd_mpu401 * mpu,int input)205 static void snd_mpu401_uart_remove_timer (struct snd_mpu401 *mpu, int input)
206 {
207 unsigned long flags;
208
209 spin_lock_irqsave (&mpu->timer_lock, flags);
210 if (mpu->timer_invoked) {
211 mpu->timer_invoked &= input ? ~MPU401_MODE_INPUT_TIMER :
212 ~MPU401_MODE_OUTPUT_TIMER;
213 if (! mpu->timer_invoked)
214 del_timer(&mpu->timer);
215 }
216 spin_unlock_irqrestore (&mpu->timer_lock, flags);
217 }
218
219 /*
220 * send a UART command
221 * return zero if successful, non-zero for some errors
222 */
223
snd_mpu401_uart_cmd(struct snd_mpu401 * mpu,unsigned char cmd,int ack)224 static int snd_mpu401_uart_cmd(struct snd_mpu401 * mpu, unsigned char cmd,
225 int ack)
226 {
227 unsigned long flags;
228 int timeout, ok;
229
230 spin_lock_irqsave(&mpu->input_lock, flags);
231 if (mpu->hardware != MPU401_HW_TRID4DWAVE) {
232 mpu->write(mpu, 0x00, MPU401D(mpu));
233 /*snd_mpu401_uart_clear_rx(mpu);*/
234 }
235 /* ok. standard MPU-401 initialization */
236 if (mpu->hardware != MPU401_HW_SB) {
237 for (timeout = 1000; timeout > 0 &&
238 !snd_mpu401_output_ready(mpu); timeout--)
239 udelay(10);
240 #ifdef CONFIG_SND_DEBUG
241 if (!timeout)
242 snd_printk(KERN_ERR "cmd: tx timeout (status = 0x%x)\n",
243 mpu->read(mpu, MPU401C(mpu)));
244 #endif
245 }
246 mpu->write(mpu, cmd, MPU401C(mpu));
247 if (ack && !(mpu->info_flags & MPU401_INFO_NO_ACK)) {
248 ok = 0;
249 timeout = 10000;
250 while (!ok && timeout-- > 0) {
251 if (snd_mpu401_input_avail(mpu)) {
252 if (mpu->read(mpu, MPU401D(mpu)) == MPU401_ACK)
253 ok = 1;
254 }
255 }
256 if (!ok && mpu->read(mpu, MPU401D(mpu)) == MPU401_ACK)
257 ok = 1;
258 } else
259 ok = 1;
260 spin_unlock_irqrestore(&mpu->input_lock, flags);
261 if (!ok) {
262 snd_printk(KERN_ERR "cmd: 0x%x failed at 0x%lx "
263 "(status = 0x%x, data = 0x%x)\n", cmd, mpu->port,
264 mpu->read(mpu, MPU401C(mpu)),
265 mpu->read(mpu, MPU401D(mpu)));
266 return 1;
267 }
268 return 0;
269 }
270
snd_mpu401_do_reset(struct snd_mpu401 * mpu)271 static int snd_mpu401_do_reset(struct snd_mpu401 *mpu)
272 {
273 if (snd_mpu401_uart_cmd(mpu, MPU401_RESET, 1))
274 return -EIO;
275 if (snd_mpu401_uart_cmd(mpu, MPU401_ENTER_UART, 0))
276 return -EIO;
277 return 0;
278 }
279
280 /*
281 * input/output open/close - protected by open_mutex in rawmidi.c
282 */
snd_mpu401_uart_input_open(struct snd_rawmidi_substream * substream)283 static int snd_mpu401_uart_input_open(struct snd_rawmidi_substream *substream)
284 {
285 struct snd_mpu401 *mpu;
286 int err;
287
288 mpu = substream->rmidi->private_data;
289 if (mpu->open_input && (err = mpu->open_input(mpu)) < 0)
290 return err;
291 if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode)) {
292 if (snd_mpu401_do_reset(mpu) < 0)
293 goto error_out;
294 }
295 mpu->substream_input = substream;
296 set_bit(MPU401_MODE_BIT_INPUT, &mpu->mode);
297 return 0;
298
299 error_out:
300 if (mpu->open_input && mpu->close_input)
301 mpu->close_input(mpu);
302 return -EIO;
303 }
304
snd_mpu401_uart_output_open(struct snd_rawmidi_substream * substream)305 static int snd_mpu401_uart_output_open(struct snd_rawmidi_substream *substream)
306 {
307 struct snd_mpu401 *mpu;
308 int err;
309
310 mpu = substream->rmidi->private_data;
311 if (mpu->open_output && (err = mpu->open_output(mpu)) < 0)
312 return err;
313 if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) {
314 if (snd_mpu401_do_reset(mpu) < 0)
315 goto error_out;
316 }
317 mpu->substream_output = substream;
318 set_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode);
319 return 0;
320
321 error_out:
322 if (mpu->open_output && mpu->close_output)
323 mpu->close_output(mpu);
324 return -EIO;
325 }
326
snd_mpu401_uart_input_close(struct snd_rawmidi_substream * substream)327 static int snd_mpu401_uart_input_close(struct snd_rawmidi_substream *substream)
328 {
329 struct snd_mpu401 *mpu;
330 int err = 0;
331
332 mpu = substream->rmidi->private_data;
333 clear_bit(MPU401_MODE_BIT_INPUT, &mpu->mode);
334 mpu->substream_input = NULL;
335 if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode))
336 err = snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0);
337 if (mpu->close_input)
338 mpu->close_input(mpu);
339 if (err)
340 return -EIO;
341 return 0;
342 }
343
snd_mpu401_uart_output_close(struct snd_rawmidi_substream * substream)344 static int snd_mpu401_uart_output_close(struct snd_rawmidi_substream *substream)
345 {
346 struct snd_mpu401 *mpu;
347 int err = 0;
348
349 mpu = substream->rmidi->private_data;
350 clear_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode);
351 mpu->substream_output = NULL;
352 if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode))
353 err = snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0);
354 if (mpu->close_output)
355 mpu->close_output(mpu);
356 if (err)
357 return -EIO;
358 return 0;
359 }
360
361 /*
362 * trigger input callback
363 */
364 static void
snd_mpu401_uart_input_trigger(struct snd_rawmidi_substream * substream,int up)365 snd_mpu401_uart_input_trigger(struct snd_rawmidi_substream *substream, int up)
366 {
367 unsigned long flags;
368 struct snd_mpu401 *mpu;
369 int max = 64;
370
371 mpu = substream->rmidi->private_data;
372 if (up) {
373 if (! test_and_set_bit(MPU401_MODE_BIT_INPUT_TRIGGER,
374 &mpu->mode)) {
375 /* first time - flush FIFO */
376 while (max-- > 0)
377 mpu->read(mpu, MPU401D(mpu));
378 if (mpu->info_flags & MPU401_INFO_USE_TIMER)
379 snd_mpu401_uart_add_timer(mpu, 1);
380 }
381
382 /* read data in advance */
383 spin_lock_irqsave(&mpu->input_lock, flags);
384 snd_mpu401_uart_input_read(mpu);
385 spin_unlock_irqrestore(&mpu->input_lock, flags);
386 } else {
387 if (mpu->info_flags & MPU401_INFO_USE_TIMER)
388 snd_mpu401_uart_remove_timer(mpu, 1);
389 clear_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode);
390 }
391
392 }
393
394 /*
395 * transfer input pending data
396 * call with input_lock spinlock held
397 */
snd_mpu401_uart_input_read(struct snd_mpu401 * mpu)398 static void snd_mpu401_uart_input_read(struct snd_mpu401 * mpu)
399 {
400 int max = 128;
401 unsigned char byte;
402
403 while (max-- > 0) {
404 if (! snd_mpu401_input_avail(mpu))
405 break; /* input not available */
406 byte = mpu->read(mpu, MPU401D(mpu));
407 if (test_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode))
408 snd_rawmidi_receive(mpu->substream_input, &byte, 1);
409 }
410 }
411
412 /*
413 * Tx FIFO sizes:
414 * CS4237B - 16 bytes
415 * AudioDrive ES1688 - 12 bytes
416 * S3 SonicVibes - 8 bytes
417 * SoundBlaster AWE 64 - 2 bytes (ugly hardware)
418 */
419
420 /*
421 * write output pending bytes
422 * call with output_lock spinlock held
423 */
snd_mpu401_uart_output_write(struct snd_mpu401 * mpu)424 static void snd_mpu401_uart_output_write(struct snd_mpu401 * mpu)
425 {
426 unsigned char byte;
427 int max = 256;
428
429 do {
430 if (snd_rawmidi_transmit_peek(mpu->substream_output,
431 &byte, 1) == 1) {
432 /*
433 * Try twice because there is hardware that insists on
434 * setting the output busy bit after each write.
435 */
436 if (!snd_mpu401_output_ready(mpu) &&
437 !snd_mpu401_output_ready(mpu))
438 break; /* Tx FIFO full - try again later */
439 mpu->write(mpu, byte, MPU401D(mpu));
440 snd_rawmidi_transmit_ack(mpu->substream_output, 1);
441 } else {
442 snd_mpu401_uart_remove_timer (mpu, 0);
443 break; /* no other data - leave the tx loop */
444 }
445 } while (--max > 0);
446 }
447
448 /*
449 * output trigger callback
450 */
451 static void
snd_mpu401_uart_output_trigger(struct snd_rawmidi_substream * substream,int up)452 snd_mpu401_uart_output_trigger(struct snd_rawmidi_substream *substream, int up)
453 {
454 unsigned long flags;
455 struct snd_mpu401 *mpu;
456
457 mpu = substream->rmidi->private_data;
458 if (up) {
459 set_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode);
460
461 /* try to add the timer at each output trigger,
462 * since the output timer might have been removed in
463 * snd_mpu401_uart_output_write().
464 */
465 if (! (mpu->info_flags & MPU401_INFO_TX_IRQ))
466 snd_mpu401_uart_add_timer(mpu, 0);
467
468 /* output pending data */
469 spin_lock_irqsave(&mpu->output_lock, flags);
470 snd_mpu401_uart_output_write(mpu);
471 spin_unlock_irqrestore(&mpu->output_lock, flags);
472 } else {
473 if (! (mpu->info_flags & MPU401_INFO_TX_IRQ))
474 snd_mpu401_uart_remove_timer(mpu, 0);
475 clear_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode);
476 }
477 }
478
479 /*
480
481 */
482
483 static const struct snd_rawmidi_ops snd_mpu401_uart_output =
484 {
485 .open = snd_mpu401_uart_output_open,
486 .close = snd_mpu401_uart_output_close,
487 .trigger = snd_mpu401_uart_output_trigger,
488 };
489
490 static const struct snd_rawmidi_ops snd_mpu401_uart_input =
491 {
492 .open = snd_mpu401_uart_input_open,
493 .close = snd_mpu401_uart_input_close,
494 .trigger = snd_mpu401_uart_input_trigger,
495 };
496
snd_mpu401_uart_free(struct snd_rawmidi * rmidi)497 static void snd_mpu401_uart_free(struct snd_rawmidi *rmidi)
498 {
499 struct snd_mpu401 *mpu = rmidi->private_data;
500 if (mpu->irq >= 0)
501 free_irq(mpu->irq, (void *) mpu);
502 release_and_free_resource(mpu->res);
503 kfree(mpu);
504 }
505
506 /**
507 * snd_mpu401_uart_new - create an MPU401-UART instance
508 * @card: the card instance
509 * @device: the device index, zero-based
510 * @hardware: the hardware type, MPU401_HW_XXXX
511 * @port: the base address of MPU401 port
512 * @info_flags: bitflags MPU401_INFO_XXX
513 * @irq: the ISA irq number, -1 if not to be allocated
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,
520 * cast from rawmidi->private_data (with struct snd_mpu401 magic-cast).
521 *
522 * Return: Zero if successful, or a negative error code.
523 */
snd_mpu401_uart_new(struct snd_card * card,int device,unsigned short hardware,unsigned long port,unsigned int info_flags,int irq,struct snd_rawmidi ** rrawmidi)524 int snd_mpu401_uart_new(struct snd_card *card, int device,
525 unsigned short hardware,
526 unsigned long port,
527 unsigned int info_flags,
528 int irq,
529 struct snd_rawmidi ** rrawmidi)
530 {
531 struct snd_mpu401 *mpu;
532 struct snd_rawmidi *rmidi;
533 int in_enable, out_enable;
534 int err;
535
536 if (rrawmidi)
537 *rrawmidi = NULL;
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)
544 return err;
545 mpu = kzalloc(sizeof(*mpu), GFP_KERNEL);
546 if (!mpu) {
547 err = -ENOMEM;
548 goto free_device;
549 }
550 rmidi->private_data = mpu;
551 rmidi->private_free = snd_mpu401_uart_free;
552 spin_lock_init(&mpu->input_lock);
553 spin_lock_init(&mpu->output_lock);
554 spin_lock_init(&mpu->timer_lock);
555 mpu->hardware = hardware;
556 mpu->irq = -1;
557 if (! (info_flags & MPU401_INFO_INTEGRATED)) {
558 int res_size = hardware == MPU401_HW_PC98II ? 4 : 2;
559 mpu->res = request_region(port, res_size, "MPU401 UART");
560 if (!mpu->res) {
561 snd_printk(KERN_ERR "mpu401_uart: "
562 "unable to grab port 0x%lx size %d\n",
563 port, res_size);
564 err = -EBUSY;
565 goto free_device;
566 }
567 }
568 if (info_flags & MPU401_INFO_MMIO) {
569 mpu->write = mpu401_write_mmio;
570 mpu->read = mpu401_read_mmio;
571 } else {
572 mpu->write = mpu401_write_port;
573 mpu->read = mpu401_read_port;
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) {
581 if (request_irq(irq, snd_mpu401_uart_interrupt, 0,
582 "MPU401 UART", (void *) mpu)) {
583 snd_printk(KERN_ERR "mpu401_uart: "
584 "unable to grab IRQ %d\n", irq);
585 err = -EBUSY;
586 goto free_device;
587 }
588 }
589 if (irq < 0 && !(info_flags & MPU401_INFO_IRQ_HOOK))
590 info_flags |= MPU401_INFO_USE_TIMER;
591 mpu->info_flags = info_flags;
592 mpu->irq = irq;
593 if (card->shortname[0])
594 snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI",
595 card->shortname);
596 else
597 sprintf(rmidi->name, "MPU-401 MIDI %d-%d",card->number, device);
598 if (out_enable) {
599 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
600 &snd_mpu401_uart_output);
601 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
602 }
603 if (in_enable) {
604 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
605 &snd_mpu401_uart_input);
606 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
607 if (out_enable)
608 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
609 }
610 mpu->rmidi = rmidi;
611 if (rrawmidi)
612 *rrawmidi = rmidi;
613 return 0;
614 free_device:
615 snd_device_free(card, rmidi);
616 return err;
617 }
618
619 EXPORT_SYMBOL(snd_mpu401_uart_new);
620
