diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /sound/drivers/mpu401/mpu401_uart.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'sound/drivers/mpu401/mpu401_uart.c')
-rw-r--r-- | sound/drivers/mpu401/mpu401_uart.c | 541 |
1 files changed, 541 insertions, 0 deletions
diff --git a/sound/drivers/mpu401/mpu401_uart.c b/sound/drivers/mpu401/mpu401_uart.c new file mode 100644 index 000000000000..0f83c5241b6b --- /dev/null +++ b/sound/drivers/mpu401/mpu401_uart.c | |||
@@ -0,0 +1,541 @@ | |||
1 | /* | ||
2 | * Copyright (c) by Jaroslav Kysela <perex@suse.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. 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 | |||
42 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.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(mpu401_t * mpu); | ||
47 | static void snd_mpu401_uart_output_write(mpu401_t * mpu); | ||
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 */ | ||
61 | static void mpu401_write_port(mpu401_t *mpu, unsigned char data, unsigned long addr) | ||
62 | { | ||
63 | outb(data, addr); | ||
64 | } | ||
65 | |||
66 | static unsigned char mpu401_read_port(mpu401_t *mpu, unsigned long addr) | ||
67 | { | ||
68 | return inb(addr); | ||
69 | } | ||
70 | |||
71 | static void mpu401_write_mmio(mpu401_t *mpu, unsigned char data, unsigned long addr) | ||
72 | { | ||
73 | writeb(data, (void __iomem *)addr); | ||
74 | } | ||
75 | |||
76 | static unsigned char mpu401_read_mmio(mpu401_t *mpu, unsigned long addr) | ||
77 | { | ||
78 | return readb((void __iomem *)addr); | ||
79 | } | ||
80 | /* */ | ||
81 | |||
82 | static void snd_mpu401_uart_clear_rx(mpu401_t *mpu) | ||
83 | { | ||
84 | int timeout = 100000; | ||
85 | for (; timeout > 0 && snd_mpu401_input_avail(mpu); timeout--) | ||
86 | mpu->read(mpu, MPU401D(mpu)); | ||
87 | #ifdef CONFIG_SND_DEBUG | ||
88 | if (timeout <= 0) | ||
89 | snd_printk("cmd: clear rx timeout (status = 0x%x)\n", mpu->read(mpu, MPU401C(mpu))); | ||
90 | #endif | ||
91 | } | ||
92 | |||
93 | static void _snd_mpu401_uart_interrupt(mpu401_t *mpu) | ||
94 | { | ||
95 | spin_lock(&mpu->input_lock); | ||
96 | if (test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) { | ||
97 | snd_mpu401_uart_input_read(mpu); | ||
98 | } else { | ||
99 | snd_mpu401_uart_clear_rx(mpu); | ||
100 | } | ||
101 | spin_unlock(&mpu->input_lock); | ||
102 | /* ok. for better Tx performance try do some output when input is done */ | ||
103 | if (test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode) && | ||
104 | test_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode)) { | ||
105 | spin_lock(&mpu->output_lock); | ||
106 | snd_mpu401_uart_output_write(mpu); | ||
107 | spin_unlock(&mpu->output_lock); | ||
108 | } | ||
109 | } | ||
110 | |||
111 | /** | ||
112 | * snd_mpu401_uart_interrupt - generic MPU401-UART interrupt handler | ||
113 | * @irq: the irq number | ||
114 | * @dev_id: mpu401 instance | ||
115 | * @regs: the reigster | ||
116 | * | ||
117 | * Processes the interrupt for MPU401-UART i/o. | ||
118 | */ | ||
119 | irqreturn_t snd_mpu401_uart_interrupt(int irq, void *dev_id, struct pt_regs *regs) | ||
120 | { | ||
121 | mpu401_t *mpu = dev_id; | ||
122 | |||
123 | if (mpu == NULL) | ||
124 | return IRQ_NONE; | ||
125 | _snd_mpu401_uart_interrupt(mpu); | ||
126 | return IRQ_HANDLED; | ||
127 | } | ||
128 | |||
129 | /* | ||
130 | * timer callback | ||
131 | * reprogram the timer and call the interrupt job | ||
132 | */ | ||
133 | static void snd_mpu401_uart_timer(unsigned long data) | ||
134 | { | ||
135 | mpu401_t *mpu = (mpu401_t *)data; | ||
136 | |||
137 | spin_lock(&mpu->timer_lock); | ||
138 | /*mpu->mode |= MPU401_MODE_TIMER;*/ | ||
139 | mpu->timer.expires = 1 + jiffies; | ||
140 | add_timer(&mpu->timer); | ||
141 | spin_unlock(&mpu->timer_lock); | ||
142 | if (mpu->rmidi) | ||
143 | _snd_mpu401_uart_interrupt(mpu); | ||
144 | } | ||
145 | |||
146 | /* | ||
147 | * initialize the timer callback if not programmed yet | ||
148 | */ | ||
149 | static void snd_mpu401_uart_add_timer (mpu401_t *mpu, int input) | ||
150 | { | ||
151 | unsigned long flags; | ||
152 | |||
153 | spin_lock_irqsave (&mpu->timer_lock, flags); | ||
154 | if (mpu->timer_invoked == 0) { | ||
155 | init_timer(&mpu->timer); | ||
156 | mpu->timer.data = (unsigned long)mpu; | ||
157 | mpu->timer.function = snd_mpu401_uart_timer; | ||
158 | mpu->timer.expires = 1 + jiffies; | ||
159 | add_timer(&mpu->timer); | ||
160 | } | ||
161 | mpu->timer_invoked |= input ? MPU401_MODE_INPUT_TIMER : MPU401_MODE_OUTPUT_TIMER; | ||
162 | spin_unlock_irqrestore (&mpu->timer_lock, flags); | ||
163 | } | ||
164 | |||
165 | /* | ||
166 | * remove the timer callback if still active | ||
167 | */ | ||
168 | static void snd_mpu401_uart_remove_timer (mpu401_t *mpu, int input) | ||
169 | { | ||
170 | unsigned long flags; | ||
171 | |||
172 | spin_lock_irqsave (&mpu->timer_lock, flags); | ||
173 | if (mpu->timer_invoked) { | ||
174 | mpu->timer_invoked &= input ? ~MPU401_MODE_INPUT_TIMER : ~MPU401_MODE_OUTPUT_TIMER; | ||
175 | if (! mpu->timer_invoked) | ||
176 | del_timer(&mpu->timer); | ||
177 | } | ||
178 | spin_unlock_irqrestore (&mpu->timer_lock, flags); | ||
179 | } | ||
180 | |||
181 | /* | ||
182 | |||
183 | */ | ||
184 | |||
185 | static void snd_mpu401_uart_cmd(mpu401_t * mpu, unsigned char cmd, int ack) | ||
186 | { | ||
187 | unsigned long flags; | ||
188 | int timeout, ok; | ||
189 | |||
190 | spin_lock_irqsave(&mpu->input_lock, flags); | ||
191 | if (mpu->hardware != MPU401_HW_TRID4DWAVE) { | ||
192 | mpu->write(mpu, 0x00, MPU401D(mpu)); | ||
193 | /*snd_mpu401_uart_clear_rx(mpu);*/ | ||
194 | } | ||
195 | /* ok. standard MPU-401 initialization */ | ||
196 | if (mpu->hardware != MPU401_HW_SB) { | ||
197 | for (timeout = 1000; timeout > 0 && !snd_mpu401_output_ready(mpu); timeout--) | ||
198 | udelay(10); | ||
199 | #ifdef CONFIG_SND_DEBUG | ||
200 | if (!timeout) | ||
201 | snd_printk("cmd: tx timeout (status = 0x%x)\n", mpu->read(mpu, MPU401C(mpu))); | ||
202 | #endif | ||
203 | } | ||
204 | mpu->write(mpu, cmd, MPU401C(mpu)); | ||
205 | if (ack) { | ||
206 | ok = 0; | ||
207 | timeout = 10000; | ||
208 | while (!ok && timeout-- > 0) { | ||
209 | if (snd_mpu401_input_avail(mpu)) { | ||
210 | if (mpu->read(mpu, MPU401D(mpu)) == MPU401_ACK) | ||
211 | ok = 1; | ||
212 | } | ||
213 | } | ||
214 | if (!ok && mpu->read(mpu, MPU401D(mpu)) == MPU401_ACK) | ||
215 | ok = 1; | ||
216 | } else { | ||
217 | ok = 1; | ||
218 | } | ||
219 | spin_unlock_irqrestore(&mpu->input_lock, flags); | ||
220 | if (! ok) | ||
221 | snd_printk("cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)\n", cmd, mpu->port, mpu->read(mpu, MPU401C(mpu)), mpu->read(mpu, MPU401D(mpu))); | ||
222 | // snd_printk("cmd: 0x%x at 0x%lx (status = 0x%x, data = 0x%x)\n", cmd, mpu->port, mpu->read(mpu, MPU401C(mpu)), mpu->read(mpu, MPU401D(mpu))); | ||
223 | } | ||
224 | |||
225 | /* | ||
226 | * input/output open/close - protected by open_mutex in rawmidi.c | ||
227 | */ | ||
228 | static int snd_mpu401_uart_input_open(snd_rawmidi_substream_t * substream) | ||
229 | { | ||
230 | mpu401_t *mpu; | ||
231 | int err; | ||
232 | |||
233 | mpu = substream->rmidi->private_data; | ||
234 | if (mpu->open_input && (err = mpu->open_input(mpu)) < 0) | ||
235 | return err; | ||
236 | if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode)) { | ||
237 | snd_mpu401_uart_cmd(mpu, MPU401_RESET, 1); | ||
238 | snd_mpu401_uart_cmd(mpu, MPU401_ENTER_UART, 1); | ||
239 | } | ||
240 | mpu->substream_input = substream; | ||
241 | set_bit(MPU401_MODE_BIT_INPUT, &mpu->mode); | ||
242 | return 0; | ||
243 | } | ||
244 | |||
245 | static int snd_mpu401_uart_output_open(snd_rawmidi_substream_t * substream) | ||
246 | { | ||
247 | mpu401_t *mpu; | ||
248 | int err; | ||
249 | |||
250 | mpu = substream->rmidi->private_data; | ||
251 | if (mpu->open_output && (err = mpu->open_output(mpu)) < 0) | ||
252 | return err; | ||
253 | if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) { | ||
254 | snd_mpu401_uart_cmd(mpu, MPU401_RESET, 1); | ||
255 | snd_mpu401_uart_cmd(mpu, MPU401_ENTER_UART, 1); | ||
256 | } | ||
257 | mpu->substream_output = substream; | ||
258 | set_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode); | ||
259 | return 0; | ||
260 | } | ||
261 | |||
262 | static int snd_mpu401_uart_input_close(snd_rawmidi_substream_t * substream) | ||
263 | { | ||
264 | mpu401_t *mpu; | ||
265 | |||
266 | mpu = substream->rmidi->private_data; | ||
267 | clear_bit(MPU401_MODE_BIT_INPUT, &mpu->mode); | ||
268 | mpu->substream_input = NULL; | ||
269 | if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode)) | ||
270 | snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0); | ||
271 | if (mpu->close_input) | ||
272 | mpu->close_input(mpu); | ||
273 | return 0; | ||
274 | } | ||
275 | |||
276 | static int snd_mpu401_uart_output_close(snd_rawmidi_substream_t * substream) | ||
277 | { | ||
278 | mpu401_t *mpu; | ||
279 | |||
280 | mpu = substream->rmidi->private_data; | ||
281 | clear_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode); | ||
282 | mpu->substream_output = NULL; | ||
283 | if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) | ||
284 | snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0); | ||
285 | if (mpu->close_output) | ||
286 | mpu->close_output(mpu); | ||
287 | return 0; | ||
288 | } | ||
289 | |||
290 | /* | ||
291 | * trigger input callback | ||
292 | */ | ||
293 | static void snd_mpu401_uart_input_trigger(snd_rawmidi_substream_t * substream, int up) | ||
294 | { | ||
295 | unsigned long flags; | ||
296 | mpu401_t *mpu; | ||
297 | int max = 64; | ||
298 | |||
299 | mpu = substream->rmidi->private_data; | ||
300 | if (up) { | ||
301 | if (! test_and_set_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode)) { | ||
302 | /* first time - flush FIFO */ | ||
303 | while (max-- > 0) | ||
304 | mpu->read(mpu, MPU401D(mpu)); | ||
305 | if (mpu->irq < 0) | ||
306 | snd_mpu401_uart_add_timer(mpu, 1); | ||
307 | } | ||
308 | |||
309 | /* read data in advance */ | ||
310 | spin_lock_irqsave(&mpu->input_lock, flags); | ||
311 | snd_mpu401_uart_input_read(mpu); | ||
312 | spin_unlock_irqrestore(&mpu->input_lock, flags); | ||
313 | } else { | ||
314 | if (mpu->irq < 0) | ||
315 | snd_mpu401_uart_remove_timer(mpu, 1); | ||
316 | clear_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode); | ||
317 | } | ||
318 | } | ||
319 | |||
320 | /* | ||
321 | * transfer input pending data | ||
322 | * call with input_lock spinlock held | ||
323 | */ | ||
324 | static void snd_mpu401_uart_input_read(mpu401_t * mpu) | ||
325 | { | ||
326 | int max = 128; | ||
327 | unsigned char byte; | ||
328 | |||
329 | while (max-- > 0) { | ||
330 | if (snd_mpu401_input_avail(mpu)) { | ||
331 | byte = mpu->read(mpu, MPU401D(mpu)); | ||
332 | if (test_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode)) | ||
333 | snd_rawmidi_receive(mpu->substream_input, &byte, 1); | ||
334 | } else { | ||
335 | break; /* input not available */ | ||
336 | } | ||
337 | } | ||
338 | } | ||
339 | |||
340 | /* | ||
341 | * Tx FIFO sizes: | ||
342 | * CS4237B - 16 bytes | ||
343 | * AudioDrive ES1688 - 12 bytes | ||
344 | * S3 SonicVibes - 8 bytes | ||
345 | * SoundBlaster AWE 64 - 2 bytes (ugly hardware) | ||
346 | */ | ||
347 | |||
348 | /* | ||
349 | * write output pending bytes | ||
350 | * call with output_lock spinlock held | ||
351 | */ | ||
352 | static void snd_mpu401_uart_output_write(mpu401_t * mpu) | ||
353 | { | ||
354 | unsigned char byte; | ||
355 | int max = 256, timeout; | ||
356 | |||
357 | do { | ||
358 | if (snd_rawmidi_transmit_peek(mpu->substream_output, &byte, 1) == 1) { | ||
359 | for (timeout = 100; timeout > 0; timeout--) { | ||
360 | if (snd_mpu401_output_ready(mpu)) { | ||
361 | mpu->write(mpu, byte, MPU401D(mpu)); | ||
362 | snd_rawmidi_transmit_ack(mpu->substream_output, 1); | ||
363 | break; | ||
364 | } | ||
365 | } | ||
366 | if (timeout == 0) | ||
367 | break; /* Tx FIFO full - try again later */ | ||
368 | } else { | ||
369 | snd_mpu401_uart_remove_timer (mpu, 0); | ||
370 | break; /* no other data - leave the tx loop */ | ||
371 | } | ||
372 | } while (--max > 0); | ||
373 | } | ||
374 | |||
375 | /* | ||
376 | * output trigger callback | ||
377 | */ | ||
378 | static void snd_mpu401_uart_output_trigger(snd_rawmidi_substream_t * substream, int up) | ||
379 | { | ||
380 | unsigned long flags; | ||
381 | mpu401_t *mpu; | ||
382 | |||
383 | mpu = substream->rmidi->private_data; | ||
384 | if (up) { | ||
385 | set_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode); | ||
386 | |||
387 | /* try to add the timer at each output trigger, | ||
388 | * since the output timer might have been removed in | ||
389 | * snd_mpu401_uart_output_write(). | ||
390 | */ | ||
391 | snd_mpu401_uart_add_timer(mpu, 0); | ||
392 | |||
393 | /* output pending data */ | ||
394 | spin_lock_irqsave(&mpu->output_lock, flags); | ||
395 | snd_mpu401_uart_output_write(mpu); | ||
396 | spin_unlock_irqrestore(&mpu->output_lock, flags); | ||
397 | } else { | ||
398 | snd_mpu401_uart_remove_timer(mpu, 0); | ||
399 | clear_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode); | ||
400 | } | ||
401 | } | ||
402 | |||
403 | /* | ||
404 | |||
405 | */ | ||
406 | |||
407 | static snd_rawmidi_ops_t snd_mpu401_uart_output = | ||
408 | { | ||
409 | .open = snd_mpu401_uart_output_open, | ||
410 | .close = snd_mpu401_uart_output_close, | ||
411 | .trigger = snd_mpu401_uart_output_trigger, | ||
412 | }; | ||
413 | |||
414 | static snd_rawmidi_ops_t snd_mpu401_uart_input = | ||
415 | { | ||
416 | .open = snd_mpu401_uart_input_open, | ||
417 | .close = snd_mpu401_uart_input_close, | ||
418 | .trigger = snd_mpu401_uart_input_trigger, | ||
419 | }; | ||
420 | |||
421 | static void snd_mpu401_uart_free(snd_rawmidi_t *rmidi) | ||
422 | { | ||
423 | mpu401_t *mpu = rmidi->private_data; | ||
424 | if (mpu->irq_flags && mpu->irq >= 0) | ||
425 | free_irq(mpu->irq, (void *) mpu); | ||
426 | if (mpu->res) { | ||
427 | release_resource(mpu->res); | ||
428 | kfree_nocheck(mpu->res); | ||
429 | } | ||
430 | kfree(mpu); | ||
431 | } | ||
432 | |||
433 | /** | ||
434 | * snd_mpu401_uart_new - create an MPU401-UART instance | ||
435 | * @card: the card instance | ||
436 | * @device: the device index, zero-based | ||
437 | * @hardware: the hardware type, MPU401_HW_XXXX | ||
438 | * @port: the base address of MPU401 port | ||
439 | * @integrated: non-zero if the port was already reserved by the chip | ||
440 | * @irq: the irq number, -1 if no interrupt for mpu | ||
441 | * @irq_flags: the irq request flags (SA_XXX), 0 if irq was already reserved. | ||
442 | * @rrawmidi: the pointer to store the new rawmidi instance | ||
443 | * | ||
444 | * Creates a new MPU-401 instance. | ||
445 | * | ||
446 | * Note that the rawmidi instance is returned on the rrawmidi argument, | ||
447 | * not the mpu401 instance itself. To access to the mpu401 instance, | ||
448 | * cast from rawmidi->private_data (with mpu401_t magic-cast). | ||
449 | * | ||
450 | * Returns zero if successful, or a negative error code. | ||
451 | */ | ||
452 | int snd_mpu401_uart_new(snd_card_t * card, int device, | ||
453 | unsigned short hardware, | ||
454 | unsigned long port, int integrated, | ||
455 | int irq, int irq_flags, | ||
456 | snd_rawmidi_t ** rrawmidi) | ||
457 | { | ||
458 | mpu401_t *mpu; | ||
459 | snd_rawmidi_t *rmidi; | ||
460 | int err; | ||
461 | |||
462 | if (rrawmidi) | ||
463 | *rrawmidi = NULL; | ||
464 | if ((err = snd_rawmidi_new(card, "MPU-401U", device, 1, 1, &rmidi)) < 0) | ||
465 | return err; | ||
466 | mpu = kcalloc(1, sizeof(*mpu), GFP_KERNEL); | ||
467 | if (mpu == NULL) { | ||
468 | snd_device_free(card, rmidi); | ||
469 | return -ENOMEM; | ||
470 | } | ||
471 | rmidi->private_data = mpu; | ||
472 | rmidi->private_free = snd_mpu401_uart_free; | ||
473 | spin_lock_init(&mpu->input_lock); | ||
474 | spin_lock_init(&mpu->output_lock); | ||
475 | spin_lock_init(&mpu->timer_lock); | ||
476 | mpu->hardware = hardware; | ||
477 | if (!integrated) { | ||
478 | int res_size = hardware == MPU401_HW_PC98II ? 4 : 2; | ||
479 | if ((mpu->res = request_region(port, res_size, "MPU401 UART")) == NULL) { | ||
480 | snd_printk(KERN_ERR "mpu401_uart: unable to grab port 0x%lx size %d\n", port, res_size); | ||
481 | snd_device_free(card, rmidi); | ||
482 | return -EBUSY; | ||
483 | } | ||
484 | } | ||
485 | switch (hardware) { | ||
486 | case MPU401_HW_AUREAL: | ||
487 | mpu->write = mpu401_write_mmio; | ||
488 | mpu->read = mpu401_read_mmio; | ||
489 | break; | ||
490 | default: | ||
491 | mpu->write = mpu401_write_port; | ||
492 | mpu->read = mpu401_read_port; | ||
493 | break; | ||
494 | } | ||
495 | mpu->port = port; | ||
496 | if (hardware == MPU401_HW_PC98II) | ||
497 | mpu->cport = port + 2; | ||
498 | else | ||
499 | mpu->cport = port + 1; | ||
500 | if (irq >= 0 && irq_flags) { | ||
501 | if (request_irq(irq, snd_mpu401_uart_interrupt, irq_flags, "MPU401 UART", (void *) mpu)) { | ||
502 | snd_printk(KERN_ERR "mpu401_uart: unable to grab IRQ %d\n", irq); | ||
503 | snd_device_free(card, rmidi); | ||
504 | return -EBUSY; | ||
505 | } | ||
506 | } | ||
507 | mpu->irq = irq; | ||
508 | mpu->irq_flags = irq_flags; | ||
509 | if (card->shortname[0]) | ||
510 | snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI", card->shortname); | ||
511 | else | ||
512 | sprintf(rmidi->name, "MPU-401 MIDI %d-%d", card->number, device); | ||
513 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_mpu401_uart_output); | ||
514 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_mpu401_uart_input); | ||
515 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | | ||
516 | SNDRV_RAWMIDI_INFO_INPUT | | ||
517 | SNDRV_RAWMIDI_INFO_DUPLEX; | ||
518 | mpu->rmidi = rmidi; | ||
519 | if (rrawmidi) | ||
520 | *rrawmidi = rmidi; | ||
521 | return 0; | ||
522 | } | ||
523 | |||
524 | EXPORT_SYMBOL(snd_mpu401_uart_interrupt); | ||
525 | EXPORT_SYMBOL(snd_mpu401_uart_new); | ||
526 | |||
527 | /* | ||
528 | * INIT part | ||
529 | */ | ||
530 | |||
531 | static int __init alsa_mpu401_uart_init(void) | ||
532 | { | ||
533 | return 0; | ||
534 | } | ||
535 | |||
536 | static void __exit alsa_mpu401_uart_exit(void) | ||
537 | { | ||
538 | } | ||
539 | |||
540 | module_init(alsa_mpu401_uart_init) | ||
541 | module_exit(alsa_mpu401_uart_exit) | ||