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Commit | Line | Data |
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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 | |
dba8b469 | 6 | * interrupts thus output is done via polling. Without interrupt, |
1da177e4 LT |
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 | ||
6cbbfe1c | 31 | #include <linux/io.h> |
1da177e4 LT |
32 | #include <linux/delay.h> |
33 | #include <linux/init.h> | |
34 | #include <linux/slab.h> | |
35 | #include <linux/ioport.h> | |
da155d5b | 36 | #include <linux/module.h> |
1da177e4 LT |
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 | ||
b415ed45 TI |
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)) | |
1da177e4 LT |
57 | |
58 | /* Build in lowlevel io */ | |
2851d963 TI |
59 | static void mpu401_write_port(struct snd_mpu401 *mpu, unsigned char data, |
60 | unsigned long addr) | |
1da177e4 LT |
61 | { |
62 | outb(data, addr); | |
63 | } | |
64 | ||
2851d963 TI |
65 | static unsigned char mpu401_read_port(struct snd_mpu401 *mpu, |
66 | unsigned long addr) | |
1da177e4 LT |
67 | { |
68 | return inb(addr); | |
69 | } | |
70 | ||
2851d963 TI |
71 | static void mpu401_write_mmio(struct snd_mpu401 *mpu, unsigned char data, |
72 | unsigned long addr) | |
1da177e4 LT |
73 | { |
74 | writeb(data, (void __iomem *)addr); | |
75 | } | |
76 | ||
2851d963 TI |
77 | static unsigned char mpu401_read_mmio(struct snd_mpu401 *mpu, |
78 | unsigned long addr) | |
1da177e4 LT |
79 | { |
80 | return readb((void __iomem *)addr); | |
81 | } | |
82 | /* */ | |
83 | ||
e1fad17b | 84 | static void snd_mpu401_uart_clear_rx(struct snd_mpu401 *mpu) |
1da177e4 LT |
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) | |
2851d963 TI |
91 | snd_printk(KERN_ERR "cmd: clear rx timeout (status = 0x%x)\n", |
92 | mpu->read(mpu, MPU401C(mpu))); | |
1da177e4 LT |
93 | #endif |
94 | } | |
95 | ||
302e4c2f | 96 | static void uart_interrupt_tx(struct snd_mpu401 *mpu) |
1da177e4 | 97 | { |
60fac85f CL |
98 | unsigned long flags; |
99 | ||
1da177e4 LT |
100 | if (test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode) && |
101 | test_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode)) { | |
60fac85f | 102 | spin_lock_irqsave(&mpu->output_lock, flags); |
1da177e4 | 103 | snd_mpu401_uart_output_write(mpu); |
60fac85f | 104 | spin_unlock_irqrestore(&mpu->output_lock, flags); |
1da177e4 LT |
105 | } |
106 | } | |
107 | ||
302e4c2f TI |
108 | static void _snd_mpu401_uart_interrupt(struct snd_mpu401 *mpu) |
109 | { | |
60fac85f CL |
110 | unsigned long flags; |
111 | ||
302e4c2f | 112 | if (mpu->info_flags & MPU401_INFO_INPUT) { |
60fac85f | 113 | spin_lock_irqsave(&mpu->input_lock, flags); |
302e4c2f TI |
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); | |
60fac85f | 118 | spin_unlock_irqrestore(&mpu->input_lock, flags); |
302e4c2f TI |
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 | ||
1da177e4 LT |
126 | /** |
127 | * snd_mpu401_uart_interrupt - generic MPU401-UART interrupt handler | |
128 | * @irq: the irq number | |
129 | * @dev_id: mpu401 instance | |
1da177e4 LT |
130 | * |
131 | * Processes the interrupt for MPU401-UART i/o. | |
eb7c06e8 YB |
132 | * |
133 | * Return: %IRQ_HANDLED if the interrupt was handled. %IRQ_NONE otherwise. | |
1da177e4 | 134 | */ |
7d12e780 | 135 | irqreturn_t snd_mpu401_uart_interrupt(int irq, void *dev_id) |
1da177e4 | 136 | { |
e1fad17b | 137 | struct snd_mpu401 *mpu = dev_id; |
1da177e4 LT |
138 | |
139 | if (mpu == NULL) | |
140 | return IRQ_NONE; | |
141 | _snd_mpu401_uart_interrupt(mpu); | |
142 | return IRQ_HANDLED; | |
143 | } | |
144 | ||
2851d963 TI |
145 | EXPORT_SYMBOL(snd_mpu401_uart_interrupt); |
146 | ||
302e4c2f TI |
147 | /** |
148 | * snd_mpu401_uart_interrupt_tx - generic MPU401-UART transmit irq handler | |
149 | * @irq: the irq number | |
150 | * @dev_id: mpu401 instance | |
302e4c2f TI |
151 | * |
152 | * Processes the interrupt for MPU401-UART output. | |
eb7c06e8 YB |
153 | * |
154 | * Return: %IRQ_HANDLED if the interrupt was handled. %IRQ_NONE otherwise. | |
302e4c2f | 155 | */ |
7d12e780 | 156 | irqreturn_t snd_mpu401_uart_interrupt_tx(int irq, void *dev_id) |
302e4c2f TI |
157 | { |
158 | struct snd_mpu401 *mpu = dev_id; | |
159 | ||
160 | if (mpu == NULL) | |
161 | return IRQ_NONE; | |
162 | uart_interrupt_tx(mpu); | |
163 | return IRQ_HANDLED; | |
164 | } | |
165 | ||
166 | EXPORT_SYMBOL(snd_mpu401_uart_interrupt_tx); | |
167 | ||
1da177e4 LT |
168 | /* |
169 | * timer callback | |
170 | * reprogram the timer and call the interrupt job | |
171 | */ | |
172 | static void snd_mpu401_uart_timer(unsigned long data) | |
173 | { | |
e1fad17b | 174 | struct snd_mpu401 *mpu = (struct snd_mpu401 *)data; |
b32425ac | 175 | unsigned long flags; |
1da177e4 | 176 | |
b32425ac | 177 | spin_lock_irqsave(&mpu->timer_lock, flags); |
1da177e4 | 178 | /*mpu->mode |= MPU401_MODE_TIMER;*/ |
b093ed23 | 179 | mod_timer(&mpu->timer, 1 + jiffies); |
b32425ac | 180 | spin_unlock_irqrestore(&mpu->timer_lock, flags); |
1da177e4 LT |
181 | if (mpu->rmidi) |
182 | _snd_mpu401_uart_interrupt(mpu); | |
183 | } | |
184 | ||
185 | /* | |
186 | * initialize the timer callback if not programmed yet | |
187 | */ | |
e1fad17b | 188 | static void snd_mpu401_uart_add_timer (struct snd_mpu401 *mpu, int input) |
1da177e4 LT |
189 | { |
190 | unsigned long flags; | |
191 | ||
192 | spin_lock_irqsave (&mpu->timer_lock, flags); | |
193 | if (mpu->timer_invoked == 0) { | |
b093ed23 TI |
194 | setup_timer(&mpu->timer, snd_mpu401_uart_timer, |
195 | (unsigned long)mpu); | |
196 | mod_timer(&mpu->timer, 1 + jiffies); | |
1da177e4 | 197 | } |
2851d963 TI |
198 | mpu->timer_invoked |= input ? MPU401_MODE_INPUT_TIMER : |
199 | MPU401_MODE_OUTPUT_TIMER; | |
1da177e4 LT |
200 | spin_unlock_irqrestore (&mpu->timer_lock, flags); |
201 | } | |
202 | ||
203 | /* | |
204 | * remove the timer callback if still active | |
205 | */ | |
e1fad17b | 206 | static void snd_mpu401_uart_remove_timer (struct snd_mpu401 *mpu, int input) |
1da177e4 LT |
207 | { |
208 | unsigned long flags; | |
209 | ||
210 | spin_lock_irqsave (&mpu->timer_lock, flags); | |
211 | if (mpu->timer_invoked) { | |
2851d963 TI |
212 | mpu->timer_invoked &= input ? ~MPU401_MODE_INPUT_TIMER : |
213 | ~MPU401_MODE_OUTPUT_TIMER; | |
1da177e4 LT |
214 | if (! mpu->timer_invoked) |
215 | del_timer(&mpu->timer); | |
216 | } | |
217 | spin_unlock_irqrestore (&mpu->timer_lock, flags); | |
218 | } | |
219 | ||
220 | /* | |
2851d963 TI |
221 | * send a UART command |
222 | * return zero if successful, non-zero for some errors | |
1da177e4 LT |
223 | */ |
224 | ||
962f831f | 225 | static int snd_mpu401_uart_cmd(struct snd_mpu401 * mpu, unsigned char cmd, |
2851d963 | 226 | int ack) |
1da177e4 LT |
227 | { |
228 | unsigned long flags; | |
229 | int timeout, ok; | |
230 | ||
231 | spin_lock_irqsave(&mpu->input_lock, flags); | |
232 | if (mpu->hardware != MPU401_HW_TRID4DWAVE) { | |
233 | mpu->write(mpu, 0x00, MPU401D(mpu)); | |
234 | /*snd_mpu401_uart_clear_rx(mpu);*/ | |
235 | } | |
236 | /* ok. standard MPU-401 initialization */ | |
237 | if (mpu->hardware != MPU401_HW_SB) { | |
2851d963 TI |
238 | for (timeout = 1000; timeout > 0 && |
239 | !snd_mpu401_output_ready(mpu); timeout--) | |
1da177e4 LT |
240 | udelay(10); |
241 | #ifdef CONFIG_SND_DEBUG | |
242 | if (!timeout) | |
2851d963 TI |
243 | snd_printk(KERN_ERR "cmd: tx timeout (status = 0x%x)\n", |
244 | mpu->read(mpu, MPU401C(mpu))); | |
1da177e4 LT |
245 | #endif |
246 | } | |
247 | mpu->write(mpu, cmd, MPU401C(mpu)); | |
df7e3fdf | 248 | if (ack && !(mpu->info_flags & MPU401_INFO_NO_ACK)) { |
1da177e4 LT |
249 | ok = 0; |
250 | timeout = 10000; | |
251 | while (!ok && timeout-- > 0) { | |
252 | if (snd_mpu401_input_avail(mpu)) { | |
253 | if (mpu->read(mpu, MPU401D(mpu)) == MPU401_ACK) | |
254 | ok = 1; | |
255 | } | |
256 | } | |
257 | if (!ok && mpu->read(mpu, MPU401D(mpu)) == MPU401_ACK) | |
258 | ok = 1; | |
2851d963 | 259 | } else |
1da177e4 | 260 | ok = 1; |
1da177e4 | 261 | spin_unlock_irqrestore(&mpu->input_lock, flags); |
962f831f | 262 | if (!ok) { |
2851d963 TI |
263 | snd_printk(KERN_ERR "cmd: 0x%x failed at 0x%lx " |
264 | "(status = 0x%x, data = 0x%x)\n", cmd, mpu->port, | |
265 | mpu->read(mpu, MPU401C(mpu)), | |
266 | mpu->read(mpu, MPU401D(mpu))); | |
962f831f JM |
267 | return 1; |
268 | } | |
269 | return 0; | |
1da177e4 LT |
270 | } |
271 | ||
8f7ba051 TI |
272 | static int snd_mpu401_do_reset(struct snd_mpu401 *mpu) |
273 | { | |
274 | if (snd_mpu401_uart_cmd(mpu, MPU401_RESET, 1)) | |
275 | return -EIO; | |
c1099fcb | 276 | if (snd_mpu401_uart_cmd(mpu, MPU401_ENTER_UART, 0)) |
8f7ba051 TI |
277 | return -EIO; |
278 | return 0; | |
279 | } | |
280 | ||
1da177e4 LT |
281 | /* |
282 | * input/output open/close - protected by open_mutex in rawmidi.c | |
283 | */ | |
e1fad17b | 284 | static int snd_mpu401_uart_input_open(struct snd_rawmidi_substream *substream) |
1da177e4 | 285 | { |
e1fad17b | 286 | struct snd_mpu401 *mpu; |
1da177e4 LT |
287 | int err; |
288 | ||
289 | mpu = substream->rmidi->private_data; | |
290 | if (mpu->open_input && (err = mpu->open_input(mpu)) < 0) | |
291 | return err; | |
292 | if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode)) { | |
8f7ba051 | 293 | if (snd_mpu401_do_reset(mpu) < 0) |
962f831f | 294 | goto error_out; |
1da177e4 LT |
295 | } |
296 | mpu->substream_input = substream; | |
297 | set_bit(MPU401_MODE_BIT_INPUT, &mpu->mode); | |
298 | return 0; | |
962f831f JM |
299 | |
300 | error_out: | |
301 | if (mpu->open_input && mpu->close_input) | |
302 | mpu->close_input(mpu); | |
303 | return -EIO; | |
1da177e4 LT |
304 | } |
305 | ||
e1fad17b | 306 | static int snd_mpu401_uart_output_open(struct snd_rawmidi_substream *substream) |
1da177e4 | 307 | { |
e1fad17b | 308 | struct snd_mpu401 *mpu; |
1da177e4 LT |
309 | int err; |
310 | ||
311 | mpu = substream->rmidi->private_data; | |
312 | if (mpu->open_output && (err = mpu->open_output(mpu)) < 0) | |
313 | return err; | |
314 | if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) { | |
8f7ba051 | 315 | if (snd_mpu401_do_reset(mpu) < 0) |
962f831f | 316 | goto error_out; |
1da177e4 LT |
317 | } |
318 | mpu->substream_output = substream; | |
319 | set_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode); | |
320 | return 0; | |
962f831f JM |
321 | |
322 | error_out: | |
323 | if (mpu->open_output && mpu->close_output) | |
324 | mpu->close_output(mpu); | |
325 | return -EIO; | |
1da177e4 LT |
326 | } |
327 | ||
e1fad17b | 328 | static int snd_mpu401_uart_input_close(struct snd_rawmidi_substream *substream) |
1da177e4 | 329 | { |
e1fad17b | 330 | struct snd_mpu401 *mpu; |
962f831f | 331 | int err = 0; |
1da177e4 LT |
332 | |
333 | mpu = substream->rmidi->private_data; | |
334 | clear_bit(MPU401_MODE_BIT_INPUT, &mpu->mode); | |
335 | mpu->substream_input = NULL; | |
336 | if (! test_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode)) | |
962f831f | 337 | err = snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0); |
1da177e4 LT |
338 | if (mpu->close_input) |
339 | mpu->close_input(mpu); | |
962f831f JM |
340 | if (err) |
341 | return -EIO; | |
1da177e4 LT |
342 | return 0; |
343 | } | |
344 | ||
e1fad17b | 345 | static int snd_mpu401_uart_output_close(struct snd_rawmidi_substream *substream) |
1da177e4 | 346 | { |
e1fad17b | 347 | struct snd_mpu401 *mpu; |
962f831f | 348 | int err = 0; |
1da177e4 LT |
349 | |
350 | mpu = substream->rmidi->private_data; | |
351 | clear_bit(MPU401_MODE_BIT_OUTPUT, &mpu->mode); | |
352 | mpu->substream_output = NULL; | |
353 | if (! test_bit(MPU401_MODE_BIT_INPUT, &mpu->mode)) | |
962f831f | 354 | err = snd_mpu401_uart_cmd(mpu, MPU401_RESET, 0); |
1da177e4 LT |
355 | if (mpu->close_output) |
356 | mpu->close_output(mpu); | |
962f831f JM |
357 | if (err) |
358 | return -EIO; | |
1da177e4 LT |
359 | return 0; |
360 | } | |
361 | ||
362 | /* | |
363 | * trigger input callback | |
364 | */ | |
2851d963 TI |
365 | static void |
366 | snd_mpu401_uart_input_trigger(struct snd_rawmidi_substream *substream, int up) | |
1da177e4 LT |
367 | { |
368 | unsigned long flags; | |
e1fad17b | 369 | struct snd_mpu401 *mpu; |
1da177e4 LT |
370 | int max = 64; |
371 | ||
372 | mpu = substream->rmidi->private_data; | |
373 | if (up) { | |
2851d963 TI |
374 | if (! test_and_set_bit(MPU401_MODE_BIT_INPUT_TRIGGER, |
375 | &mpu->mode)) { | |
1da177e4 LT |
376 | /* first time - flush FIFO */ |
377 | while (max-- > 0) | |
378 | mpu->read(mpu, MPU401D(mpu)); | |
dba8b469 | 379 | if (mpu->info_flags & MPU401_INFO_USE_TIMER) |
1da177e4 LT |
380 | snd_mpu401_uart_add_timer(mpu, 1); |
381 | } | |
382 | ||
383 | /* read data in advance */ | |
384 | spin_lock_irqsave(&mpu->input_lock, flags); | |
385 | snd_mpu401_uart_input_read(mpu); | |
386 | spin_unlock_irqrestore(&mpu->input_lock, flags); | |
387 | } else { | |
dba8b469 | 388 | if (mpu->info_flags & MPU401_INFO_USE_TIMER) |
1da177e4 LT |
389 | snd_mpu401_uart_remove_timer(mpu, 1); |
390 | clear_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode); | |
391 | } | |
962f831f | 392 | |
1da177e4 LT |
393 | } |
394 | ||
395 | /* | |
396 | * transfer input pending data | |
397 | * call with input_lock spinlock held | |
398 | */ | |
e1fad17b | 399 | static void snd_mpu401_uart_input_read(struct snd_mpu401 * mpu) |
1da177e4 LT |
400 | { |
401 | int max = 128; | |
402 | unsigned char byte; | |
403 | ||
404 | while (max-- > 0) { | |
2851d963 | 405 | if (! snd_mpu401_input_avail(mpu)) |
1da177e4 | 406 | break; /* input not available */ |
2851d963 TI |
407 | byte = mpu->read(mpu, MPU401D(mpu)); |
408 | if (test_bit(MPU401_MODE_BIT_INPUT_TRIGGER, &mpu->mode)) | |
409 | snd_rawmidi_receive(mpu->substream_input, &byte, 1); | |
1da177e4 LT |
410 | } |
411 | } | |
412 | ||
413 | /* | |
414 | * Tx FIFO sizes: | |
415 | * CS4237B - 16 bytes | |
416 | * AudioDrive ES1688 - 12 bytes | |
417 | * S3 SonicVibes - 8 bytes | |
418 | * SoundBlaster AWE 64 - 2 bytes (ugly hardware) | |
419 | */ | |
420 | ||
421 | /* | |
422 | * write output pending bytes | |
423 | * call with output_lock spinlock held | |
424 | */ | |
e1fad17b | 425 | static void snd_mpu401_uart_output_write(struct snd_mpu401 * mpu) |
1da177e4 LT |
426 | { |
427 | unsigned char byte; | |
ea6b5828 | 428 | int max = 256; |
1da177e4 LT |
429 | |
430 | do { | |
2851d963 TI |
431 | if (snd_rawmidi_transmit_peek(mpu->substream_output, |
432 | &byte, 1) == 1) { | |
ea6b5828 CL |
433 | /* |
434 | * Try twice because there is hardware that insists on | |
435 | * setting the output busy bit after each write. | |
436 | */ | |
437 | if (!snd_mpu401_output_ready(mpu) && | |
438 | !snd_mpu401_output_ready(mpu)) | |
1da177e4 | 439 | break; /* Tx FIFO full - try again later */ |
2851d963 TI |
440 | mpu->write(mpu, byte, MPU401D(mpu)); |
441 | snd_rawmidi_transmit_ack(mpu->substream_output, 1); | |
1da177e4 LT |
442 | } else { |
443 | snd_mpu401_uart_remove_timer (mpu, 0); | |
444 | break; /* no other data - leave the tx loop */ | |
445 | } | |
446 | } while (--max > 0); | |
447 | } | |
448 | ||
449 | /* | |
450 | * output trigger callback | |
451 | */ | |
2851d963 TI |
452 | static void |
453 | snd_mpu401_uart_output_trigger(struct snd_rawmidi_substream *substream, int up) | |
1da177e4 LT |
454 | { |
455 | unsigned long flags; | |
e1fad17b | 456 | struct snd_mpu401 *mpu; |
1da177e4 LT |
457 | |
458 | mpu = substream->rmidi->private_data; | |
459 | if (up) { | |
460 | set_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode); | |
461 | ||
462 | /* try to add the timer at each output trigger, | |
463 | * since the output timer might have been removed in | |
464 | * snd_mpu401_uart_output_write(). | |
465 | */ | |
302e4c2f TI |
466 | if (! (mpu->info_flags & MPU401_INFO_TX_IRQ)) |
467 | snd_mpu401_uart_add_timer(mpu, 0); | |
1da177e4 LT |
468 | |
469 | /* output pending data */ | |
470 | spin_lock_irqsave(&mpu->output_lock, flags); | |
471 | snd_mpu401_uart_output_write(mpu); | |
472 | spin_unlock_irqrestore(&mpu->output_lock, flags); | |
473 | } else { | |
302e4c2f TI |
474 | if (! (mpu->info_flags & MPU401_INFO_TX_IRQ)) |
475 | snd_mpu401_uart_remove_timer(mpu, 0); | |
1da177e4 LT |
476 | clear_bit(MPU401_MODE_BIT_OUTPUT_TRIGGER, &mpu->mode); |
477 | } | |
478 | } | |
479 | ||
480 | /* | |
481 | ||
482 | */ | |
483 | ||
c36f486d | 484 | static const struct snd_rawmidi_ops snd_mpu401_uart_output = |
1da177e4 LT |
485 | { |
486 | .open = snd_mpu401_uart_output_open, | |
487 | .close = snd_mpu401_uart_output_close, | |
488 | .trigger = snd_mpu401_uart_output_trigger, | |
489 | }; | |
490 | ||
c36f486d | 491 | static const struct snd_rawmidi_ops snd_mpu401_uart_input = |
1da177e4 LT |
492 | { |
493 | .open = snd_mpu401_uart_input_open, | |
494 | .close = snd_mpu401_uart_input_close, | |
495 | .trigger = snd_mpu401_uart_input_trigger, | |
496 | }; | |
497 | ||
e1fad17b | 498 | static void snd_mpu401_uart_free(struct snd_rawmidi *rmidi) |
1da177e4 | 499 | { |
e1fad17b | 500 | struct snd_mpu401 *mpu = rmidi->private_data; |
dba8b469 | 501 | if (mpu->irq >= 0) |
1da177e4 | 502 | free_irq(mpu->irq, (void *) mpu); |
b1d5776d | 503 | release_and_free_resource(mpu->res); |
1da177e4 LT |
504 | kfree(mpu); |
505 | } | |
506 | ||
507 | /** | |
508 | * snd_mpu401_uart_new - create an MPU401-UART instance | |
509 | * @card: the card instance | |
510 | * @device: the device index, zero-based | |
511 | * @hardware: the hardware type, MPU401_HW_XXXX | |
512 | * @port: the base address of MPU401 port | |
302e4c2f | 513 | * @info_flags: bitflags MPU401_INFO_XXX |
dba8b469 | 514 | * @irq: the ISA irq number, -1 if not to be allocated |
1da177e4 LT |
515 | * @rrawmidi: the pointer to store the new rawmidi instance |
516 | * | |
517 | * Creates a new MPU-401 instance. | |
518 | * | |
519 | * Note that the rawmidi instance is returned on the rrawmidi argument, | |
520 | * not the mpu401 instance itself. To access to the mpu401 instance, | |
e1fad17b | 521 | * cast from rawmidi->private_data (with struct snd_mpu401 magic-cast). |
1da177e4 | 522 | * |
eb7c06e8 | 523 | * Return: Zero if successful, or a negative error code. |
1da177e4 | 524 | */ |
e1fad17b | 525 | int snd_mpu401_uart_new(struct snd_card *card, int device, |
1da177e4 | 526 | unsigned short hardware, |
302e4c2f TI |
527 | unsigned long port, |
528 | unsigned int info_flags, | |
dba8b469 | 529 | int irq, |
e1fad17b | 530 | struct snd_rawmidi ** rrawmidi) |
1da177e4 | 531 | { |
e1fad17b TI |
532 | struct snd_mpu401 *mpu; |
533 | struct snd_rawmidi *rmidi; | |
302e4c2f | 534 | int in_enable, out_enable; |
1da177e4 LT |
535 | int err; |
536 | ||
537 | if (rrawmidi) | |
538 | *rrawmidi = NULL; | |
302e4c2f TI |
539 | if (! (info_flags & (MPU401_INFO_INPUT | MPU401_INFO_OUTPUT))) |
540 | info_flags |= MPU401_INFO_INPUT | MPU401_INFO_OUTPUT; | |
541 | in_enable = (info_flags & MPU401_INFO_INPUT) ? 1 : 0; | |
542 | out_enable = (info_flags & MPU401_INFO_OUTPUT) ? 1 : 0; | |
543 | if ((err = snd_rawmidi_new(card, "MPU-401U", device, | |
544 | out_enable, in_enable, &rmidi)) < 0) | |
1da177e4 | 545 | return err; |
561b220a | 546 | mpu = kzalloc(sizeof(*mpu), GFP_KERNEL); |
1da177e4 | 547 | if (mpu == NULL) { |
73e77ba0 | 548 | snd_printk(KERN_ERR "mpu401_uart: cannot allocate\n"); |
1da177e4 LT |
549 | snd_device_free(card, rmidi); |
550 | return -ENOMEM; | |
551 | } | |
552 | rmidi->private_data = mpu; | |
553 | rmidi->private_free = snd_mpu401_uart_free; | |
554 | spin_lock_init(&mpu->input_lock); | |
555 | spin_lock_init(&mpu->output_lock); | |
556 | spin_lock_init(&mpu->timer_lock); | |
557 | mpu->hardware = hardware; | |
bc733d49 | 558 | mpu->irq = -1; |
302e4c2f | 559 | if (! (info_flags & MPU401_INFO_INTEGRATED)) { |
1da177e4 | 560 | int res_size = hardware == MPU401_HW_PC98II ? 4 : 2; |
2851d963 TI |
561 | mpu->res = request_region(port, res_size, "MPU401 UART"); |
562 | if (mpu->res == NULL) { | |
563 | snd_printk(KERN_ERR "mpu401_uart: " | |
564 | "unable to grab port 0x%lx size %d\n", | |
565 | port, res_size); | |
1da177e4 LT |
566 | snd_device_free(card, rmidi); |
567 | return -EBUSY; | |
568 | } | |
569 | } | |
302e4c2f | 570 | if (info_flags & MPU401_INFO_MMIO) { |
1da177e4 LT |
571 | mpu->write = mpu401_write_mmio; |
572 | mpu->read = mpu401_read_mmio; | |
302e4c2f | 573 | } else { |
1da177e4 LT |
574 | mpu->write = mpu401_write_port; |
575 | mpu->read = mpu401_read_port; | |
1da177e4 LT |
576 | } |
577 | mpu->port = port; | |
578 | if (hardware == MPU401_HW_PC98II) | |
579 | mpu->cport = port + 2; | |
580 | else | |
581 | mpu->cport = port + 1; | |
dba8b469 | 582 | if (irq >= 0) { |
88e24c3a | 583 | if (request_irq(irq, snd_mpu401_uart_interrupt, 0, |
2851d963 TI |
584 | "MPU401 UART", (void *) mpu)) { |
585 | snd_printk(KERN_ERR "mpu401_uart: " | |
586 | "unable to grab IRQ %d\n", irq); | |
1da177e4 LT |
587 | snd_device_free(card, rmidi); |
588 | return -EBUSY; | |
589 | } | |
590 | } | |
dba8b469 CL |
591 | if (irq < 0 && !(info_flags & MPU401_INFO_IRQ_HOOK)) |
592 | info_flags |= MPU401_INFO_USE_TIMER; | |
302e4c2f | 593 | mpu->info_flags = info_flags; |
1da177e4 | 594 | mpu->irq = irq; |
1da177e4 | 595 | if (card->shortname[0]) |
2851d963 TI |
596 | snprintf(rmidi->name, sizeof(rmidi->name), "%s MIDI", |
597 | card->shortname); | |
1da177e4 | 598 | else |
2851d963 | 599 | sprintf(rmidi->name, "MPU-401 MIDI %d-%d",card->number, device); |
302e4c2f TI |
600 | if (out_enable) { |
601 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, | |
602 | &snd_mpu401_uart_output); | |
603 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; | |
604 | } | |
605 | if (in_enable) { | |
606 | snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, | |
607 | &snd_mpu401_uart_input); | |
608 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; | |
609 | if (out_enable) | |
610 | rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; | |
611 | } | |
1da177e4 LT |
612 | mpu->rmidi = rmidi; |
613 | if (rrawmidi) | |
614 | *rrawmidi = rmidi; | |
615 | return 0; | |
616 | } | |
617 | ||
1da177e4 LT |
618 | EXPORT_SYMBOL(snd_mpu401_uart_new); |
619 | ||
620 | /* | |
621 | * INIT part | |
622 | */ | |
623 | ||
624 | static int __init alsa_mpu401_uart_init(void) | |
625 | { | |
626 | return 0; | |
627 | } | |
628 | ||
629 | static void __exit alsa_mpu401_uart_exit(void) | |
630 | { | |
631 | } | |
632 | ||
633 | module_init(alsa_mpu401_uart_init) | |
634 | module_exit(alsa_mpu401_uart_exit) |