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NFS: Remove use of the Big Kernel Lock around nfs calls to readlink
[linux-2.6/mini2440.git] / sound / drivers / mts64.c
blob5327c6f841f40aad39888b5005137c78d2dcbe9e
1 /*
2 * ALSA Driver for Ego Systems Inc. (ESI) Miditerminal 4140
3 * Copyright (c) 2006 by Matthias König <mk@phasorlab.de>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 */
20
21 #include <sound/driver.h>
22 #include <linux/init.h>
23 #include <linux/platform_device.h>
24 #include <linux/parport.h>
25 #include <linux/spinlock.h>
26 #include <linux/delay.h>
27 #include <sound/core.h>
28 #include <sound/initval.h>
29 #include <sound/rawmidi.h>
30 #include <sound/control.h>
31
32 #define CARD_NAME "Miditerminal 4140"
33 #define DRIVER_NAME "MTS64"
34 #define PLATFORM_DRIVER "snd_mts64"
35
36 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
37 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
38 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
39
40 static struct platform_device *platform_devices[SNDRV_CARDS];
41 static int device_count;
42
43 module_param_array(index, int, NULL, S_IRUGO);
44 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
45 module_param_array(id, charp, NULL, S_IRUGO);
46 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
47 module_param_array(enable, bool, NULL, S_IRUGO);
48 MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
49
50 MODULE_AUTHOR("Matthias Koenig <mk@phasorlab.de>");
51 MODULE_DESCRIPTION("ESI Miditerminal 4140");
52 MODULE_LICENSE("GPL");
53 MODULE_SUPPORTED_DEVICE("{{ESI,Miditerminal 4140}}");
54
55 /*********************************************************************
56 * Chip specific
57 *********************************************************************/
58 #define MTS64_NUM_INPUT_PORTS 5
59 #define MTS64_NUM_OUTPUT_PORTS 4
60 #define MTS64_SMPTE_SUBSTREAM 4
61
62 struct mts64 {
63 spinlock_t lock;
64 struct snd_card *card;
65 struct snd_rawmidi *rmidi;
66 struct pardevice *pardev;
67 int pardev_claimed;
68
69 int open_count;
70 int current_midi_output_port;
71 int current_midi_input_port;
72 u8 mode[MTS64_NUM_INPUT_PORTS];
73 struct snd_rawmidi_substream *midi_input_substream[MTS64_NUM_INPUT_PORTS];
74 int smpte_switch;
75 u8 time[4]; /* [0]=hh, [1]=mm, [2]=ss, [3]=ff */
76 u8 fps;
77 };
78
79 static int snd_mts64_free(struct mts64 *mts)
80 {
81 kfree(mts);
82 return 0;
83 }
84
85 static int __devinit snd_mts64_create(struct snd_card *card,
86 struct pardevice *pardev,
87 struct mts64 **rchip)
88 {
89 struct mts64 *mts;
90
91 *rchip = NULL;
92
93 mts = kzalloc(sizeof(struct mts64), GFP_KERNEL);
94 if (mts == NULL)
95 return -ENOMEM;
96
97 /* Init chip specific data */
98 spin_lock_init(&mts->lock);
99 mts->card = card;
100 mts->pardev = pardev;
101 mts->current_midi_output_port = -1;
102 mts->current_midi_input_port = -1;
103
104 *rchip = mts;
105
106 return 0;
107 }
108
109 /*********************************************************************
110 * HW register related constants
111 *********************************************************************/
112
113 /* Status Bits */
114 #define MTS64_STAT_BSY 0x80
115 #define MTS64_STAT_BIT_SET 0x20 /* readout process, bit is set */
116 #define MTS64_STAT_PORT 0x10 /* read byte is a port number */
117
118 /* Control Bits */
119 #define MTS64_CTL_READOUT 0x08 /* enable readout */
120 #define MTS64_CTL_WRITE_CMD 0x06
121 #define MTS64_CTL_WRITE_DATA 0x02
122 #define MTS64_CTL_STROBE 0x01
123
124 /* Command */
125 #define MTS64_CMD_RESET 0xfe
126 #define MTS64_CMD_PROBE 0x8f /* Used in probing procedure */
127 #define MTS64_CMD_SMPTE_SET_TIME 0xe8
128 #define MTS64_CMD_SMPTE_SET_FPS 0xee
129 #define MTS64_CMD_SMPTE_STOP 0xef
130 #define MTS64_CMD_SMPTE_FPS_24 0xe3
131 #define MTS64_CMD_SMPTE_FPS_25 0xe2
132 #define MTS64_CMD_SMPTE_FPS_2997 0xe4
133 #define MTS64_CMD_SMPTE_FPS_30D 0xe1
134 #define MTS64_CMD_SMPTE_FPS_30 0xe0
135 #define MTS64_CMD_COM_OPEN 0xf8 /* setting the communication mode */
136 #define MTS64_CMD_COM_CLOSE1 0xff /* clearing communication mode */
137 #define MTS64_CMD_COM_CLOSE2 0xf5
138
139 /*********************************************************************
140 * Hardware specific functions
141 *********************************************************************/
142 static void mts64_enable_readout(struct parport *p);
143 static void mts64_disable_readout(struct parport *p);
144 static int mts64_device_ready(struct parport *p);
145 static int mts64_device_init(struct parport *p);
146 static int mts64_device_open(struct mts64 *mts);
147 static int mts64_device_close(struct mts64 *mts);
148 static u8 mts64_map_midi_input(u8 c);
149 static int mts64_probe(struct parport *p);
150 static u16 mts64_read(struct parport *p);
151 static u8 mts64_read_char(struct parport *p);
152 static void mts64_smpte_start(struct parport *p,
153 u8 hours, u8 minutes,
154 u8 seconds, u8 frames,
155 u8 idx);
156 static void mts64_smpte_stop(struct parport *p);
157 static void mts64_write_command(struct parport *p, u8 c);
158 static void mts64_write_data(struct parport *p, u8 c);
159 static void mts64_write_midi(struct mts64 *mts, u8 c, int midiport);
160
161
162 /* Enables the readout procedure
163 *
164 * Before we can read a midi byte from the device, we have to set
165 * bit 3 of control port.
166 */
167 static void mts64_enable_readout(struct parport *p)
168 {
169 u8 c;
170
171 c = parport_read_control(p);
172 c |= MTS64_CTL_READOUT;
173 parport_write_control(p, c);
174 }
175
176 /* Disables readout
177 *
178 * Readout is disabled by clearing bit 3 of control
179 */
180 static void mts64_disable_readout(struct parport *p)
181 {
182 u8 c;
183
184 c = parport_read_control(p);
185 c &= ~MTS64_CTL_READOUT;
186 parport_write_control(p, c);
187 }
188
189 /* waits for device ready
190 *
191 * Checks if BUSY (Bit 7 of status) is clear
192 * 1 device ready
193 * 0 failure
194 */
195 static int mts64_device_ready(struct parport *p)
196 {
197 int i;
198 u8 c;
199
200 for (i = 0; i < 0xffff; ++i) {
201 c = parport_read_status(p);
202 c &= MTS64_STAT_BSY;
203 if (c != 0)
204 return 1;
205 }
206
207 return 0;
208 }
209
210 /* Init device (LED blinking startup magic)
211 *
212 * Returns:
213 * 0 init ok
214 * -EIO failure
215 */
216 static int __devinit mts64_device_init(struct parport *p)
217 {
218 int i;
219
220 mts64_write_command(p, MTS64_CMD_RESET);
221
222 for (i = 0; i < 64; ++i) {
223 msleep(100);
224
225 if (mts64_probe(p) == 0) {
226 /* success */
227 mts64_disable_readout(p);
228 return 0;
229 }
230 }
231 mts64_disable_readout(p);
232
233 return -EIO;
234 }
235
236 /*
237 * Opens the device (set communication mode)
238 */
239 static int mts64_device_open(struct mts64 *mts)
240 {
241 int i;
242 struct parport *p = mts->pardev->port;
243
244 for (i = 0; i < 5; ++i)
245 mts64_write_command(p, MTS64_CMD_COM_OPEN);
246
247 return 0;
248 }
249
250 /*
251 * Close device (clear communication mode)
252 */
253 static int mts64_device_close(struct mts64 *mts)
254 {
255 int i;
256 struct parport *p = mts->pardev->port;
257
258 for (i = 0; i < 5; ++i) {
259 mts64_write_command(p, MTS64_CMD_COM_CLOSE1);
260 mts64_write_command(p, MTS64_CMD_COM_CLOSE2);
261 }
262
263 return 0;
264 }
265
266 /* map hardware port to substream number
267 *
268 * When reading a byte from the device, the device tells us
269 * on what port the byte is. This HW port has to be mapped to
270 * the midiport (substream number).
271 * substream 0-3 are Midiports 1-4
272 * substream 4 is SMPTE Timecode
273 * The mapping is done by the table:
274 * HW | 0 | 1 | 2 | 3 | 4
275 * SW | 0 | 1 | 4 | 2 | 3
276 */
277 static u8 mts64_map_midi_input(u8 c)
278 {
279 static u8 map[] = { 0, 1, 4, 2, 3 };
280
281 return map[c];
282 }
283
284
285 /* Probe parport for device
286 *
287 * Do we have a Miditerminal 4140 on parport?
288 * Returns:
289 * 0 device found
290 * -ENODEV no device
291 */
292 static int __devinit mts64_probe(struct parport *p)
293 {
294 u8 c;
295
296 mts64_smpte_stop(p);
297 mts64_write_command(p, MTS64_CMD_PROBE);
298
299 msleep(50);
300
301 c = mts64_read(p);
302
303 c &= 0x00ff;
304 if (c != MTS64_CMD_PROBE)
305 return -ENODEV;
306 else
307 return 0;
308
309 }
310
311 /* Read byte incl. status from device
312 *
313 * Returns:
314 * data in lower 8 bits and status in upper 8 bits
315 */
316 static u16 mts64_read(struct parport *p)
317 {
318 u8 data, status;
319
320 mts64_device_ready(p);
321 mts64_enable_readout(p);
322 status = parport_read_status(p);
323 data = mts64_read_char(p);
324 mts64_disable_readout(p);
325
326 return (status << 8) | data;
327 }
328
329 /* Read a byte from device
330 *
331 * Note, that readout mode has to be enabled.
332 * readout procedure is as follows:
333 * - Write number of the Bit to read to DATA
334 * - Read STATUS
335 * - Bit 5 of STATUS indicates if Bit is set
336 *
337 * Returns:
338 * Byte read from device
339 */
340 static u8 mts64_read_char(struct parport *p)
341 {
342 u8 c = 0;
343 u8 status;
344 u8 i;
345
346 for (i = 0; i < 8; ++i) {
347 parport_write_data(p, i);
348 c >>= 1;
349 status = parport_read_status(p);
350 if (status & MTS64_STAT_BIT_SET)
351 c |= 0x80;
352 }
353
354 return c;
355 }
356
357 /* Starts SMPTE Timecode generation
358 *
359 * The device creates SMPTE Timecode by hardware.
360 * 0 24 fps
361 * 1 25 fps
362 * 2 29.97 fps
363 * 3 30 fps (Drop-frame)
364 * 4 30 fps
365 */
366 static void mts64_smpte_start(struct parport *p,
367 u8 hours, u8 minutes,
368 u8 seconds, u8 frames,
369 u8 idx)
370 {
371 static u8 fps[5] = { MTS64_CMD_SMPTE_FPS_24,
372 MTS64_CMD_SMPTE_FPS_25,
373 MTS64_CMD_SMPTE_FPS_2997,
374 MTS64_CMD_SMPTE_FPS_30D,
375 MTS64_CMD_SMPTE_FPS_30 };
376
377 mts64_write_command(p, MTS64_CMD_SMPTE_SET_TIME);
378 mts64_write_command(p, frames);
379 mts64_write_command(p, seconds);
380 mts64_write_command(p, minutes);
381 mts64_write_command(p, hours);
382
383 mts64_write_command(p, MTS64_CMD_SMPTE_SET_FPS);
384 mts64_write_command(p, fps[idx]);
385 }
386
387 /* Stops SMPTE Timecode generation
388 */
389 static void mts64_smpte_stop(struct parport *p)
390 {
391 mts64_write_command(p, MTS64_CMD_SMPTE_STOP);
392 }
393
394 /* Write a command byte to device
395 */
396 static void mts64_write_command(struct parport *p, u8 c)
397 {
398 mts64_device_ready(p);
399
400 parport_write_data(p, c);
401
402 parport_write_control(p, MTS64_CTL_WRITE_CMD);
403 parport_write_control(p, MTS64_CTL_WRITE_CMD | MTS64_CTL_STROBE);
404 parport_write_control(p, MTS64_CTL_WRITE_CMD);
405 }
406
407 /* Write a data byte to device
408 */
409 static void mts64_write_data(struct parport *p, u8 c)
410 {
411 mts64_device_ready(p);
412
413 parport_write_data(p, c);
414
415 parport_write_control(p, MTS64_CTL_WRITE_DATA);
416 parport_write_control(p, MTS64_CTL_WRITE_DATA | MTS64_CTL_STROBE);
417 parport_write_control(p, MTS64_CTL_WRITE_DATA);
418 }
419
420 /* Write a MIDI byte to midiport
421 *
422 * midiport ranges from 0-3 and maps to Ports 1-4
423 * assumptions: communication mode is on
424 */
425 static void mts64_write_midi(struct mts64 *mts, u8 c,
426 int midiport)
427 {
428 struct parport *p = mts->pardev->port;
429
430 /* check current midiport */
431 if (mts->current_midi_output_port != midiport)
432 mts64_write_command(p, midiport);
433
434 /* write midi byte */
435 mts64_write_data(p, c);
436 }
437
438 /*********************************************************************
439 * Control elements
440 *********************************************************************/
441
442 /* SMPTE Switch */
443 static int snd_mts64_ctl_smpte_switch_info(struct snd_kcontrol *kctl,
444 struct snd_ctl_elem_info *uinfo)
445 {
446 uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
447 uinfo->count = 1;
448 uinfo->value.integer.min = 0;
449 uinfo->value.integer.max = 1;
450 return 0;
451 }
452
453 static int snd_mts64_ctl_smpte_switch_get(struct snd_kcontrol* kctl,
454 struct snd_ctl_elem_value *uctl)
455 {
456 struct mts64 *mts = snd_kcontrol_chip(kctl);
457
458 spin_lock_irq(&mts->lock);
459 uctl->value.integer.value[0] = mts->smpte_switch;
460 spin_unlock_irq(&mts->lock);
461
462 return 0;
463 }
464
465 /* smpte_switch is not accessed from IRQ handler, so we just need
466 to protect the HW access */
467 static int snd_mts64_ctl_smpte_switch_put(struct snd_kcontrol* kctl,
468 struct snd_ctl_elem_value *uctl)
469 {
470 struct mts64 *mts = snd_kcontrol_chip(kctl);
471 int changed = 0;
472
473 spin_lock_irq(&mts->lock);
474 if (mts->smpte_switch == uctl->value.integer.value[0])
475 goto __out;
476
477 changed = 1;
478 mts->smpte_switch = uctl->value.integer.value[0];
479 if (mts->smpte_switch) {
480 mts64_smpte_start(mts->pardev->port,
481 mts->time[0], mts->time[1],
482 mts->time[2], mts->time[3],
483 mts->fps);
484 } else {
485 mts64_smpte_stop(mts->pardev->port);
486 }
487 __out:
488 spin_unlock_irq(&mts->lock);
489 return changed;
490 }
491
492 static struct snd_kcontrol_new mts64_ctl_smpte_switch __devinitdata = {
493 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
494 .name = "SMPTE Playback Switch",
495 .index = 0,
496 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
497 .private_value = 0,
498 .info = snd_mts64_ctl_smpte_switch_info,
499 .get = snd_mts64_ctl_smpte_switch_get,
500 .put = snd_mts64_ctl_smpte_switch_put
501 };
502
503 /* Time */
504 static int snd_mts64_ctl_smpte_time_h_info(struct snd_kcontrol *kctl,
505 struct snd_ctl_elem_info *uinfo)
506 {
507 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
508 uinfo->count = 1;
509 uinfo->value.integer.min = 0;
510 uinfo->value.integer.max = 23;
511 return 0;
512 }
513
514 static int snd_mts64_ctl_smpte_time_f_info(struct snd_kcontrol *kctl,
515 struct snd_ctl_elem_info *uinfo)
516 {
517 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
518 uinfo->count = 1;
519 uinfo->value.integer.min = 0;
520 uinfo->value.integer.max = 99;
521 return 0;
522 }
523
524 static int snd_mts64_ctl_smpte_time_info(struct snd_kcontrol *kctl,
525 struct snd_ctl_elem_info *uinfo)
526 {
527 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
528 uinfo->count = 1;
529 uinfo->value.integer.min = 0;
530 uinfo->value.integer.max = 59;
531 return 0;
532 }
533
534 static int snd_mts64_ctl_smpte_time_get(struct snd_kcontrol *kctl,
535 struct snd_ctl_elem_value *uctl)
536 {
537 struct mts64 *mts = snd_kcontrol_chip(kctl);
538 int idx = kctl->private_value;
539
540 spin_lock_irq(&mts->lock);
541 uctl->value.integer.value[0] = mts->time[idx];
542 spin_unlock_irq(&mts->lock);
543
544 return 0;
545 }
546
547 static int snd_mts64_ctl_smpte_time_put(struct snd_kcontrol *kctl,
548 struct snd_ctl_elem_value *uctl)
549 {
550 struct mts64 *mts = snd_kcontrol_chip(kctl);
551 int idx = kctl->private_value;
552 int changed = 0;
553
554 spin_lock_irq(&mts->lock);
555 if (mts->time[idx] != uctl->value.integer.value[0]) {
556 changed = 1;
557 mts->time[idx] = uctl->value.integer.value[0];
558 }
559 spin_unlock_irq(&mts->lock);
560
561 return changed;
562 }
563
564 static struct snd_kcontrol_new mts64_ctl_smpte_time_hours __devinitdata = {
565 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
566 .name = "SMPTE Time Hours",
567 .index = 0,
568 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
569 .private_value = 0,
570 .info = snd_mts64_ctl_smpte_time_h_info,
571 .get = snd_mts64_ctl_smpte_time_get,
572 .put = snd_mts64_ctl_smpte_time_put
573 };
574
575 static struct snd_kcontrol_new mts64_ctl_smpte_time_minutes __devinitdata = {
576 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
577 .name = "SMPTE Time Minutes",
578 .index = 0,
579 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
580 .private_value = 1,
581 .info = snd_mts64_ctl_smpte_time_info,
582 .get = snd_mts64_ctl_smpte_time_get,
583 .put = snd_mts64_ctl_smpte_time_put
584 };
585
586 static struct snd_kcontrol_new mts64_ctl_smpte_time_seconds __devinitdata = {
587 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
588 .name = "SMPTE Time Seconds",
589 .index = 0,
590 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
591 .private_value = 2,
592 .info = snd_mts64_ctl_smpte_time_info,
593 .get = snd_mts64_ctl_smpte_time_get,
594 .put = snd_mts64_ctl_smpte_time_put
595 };
596
597 static struct snd_kcontrol_new mts64_ctl_smpte_time_frames __devinitdata = {
598 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
599 .name = "SMPTE Time Frames",
600 .index = 0,
601 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
602 .private_value = 3,
603 .info = snd_mts64_ctl_smpte_time_f_info,
604 .get = snd_mts64_ctl_smpte_time_get,
605 .put = snd_mts64_ctl_smpte_time_put
606 };
607
608 /* FPS */
609 static int snd_mts64_ctl_smpte_fps_info(struct snd_kcontrol *kctl,
610 struct snd_ctl_elem_info *uinfo)
611 {
612 static char *texts[5] = { "24",
613 "25",
614 "29.97",
615 "30D",
616 "30" };
617
618 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
619 uinfo->count = 1;
620 uinfo->value.enumerated.items = 5;
621 if (uinfo->value.enumerated.item > 4)
622 uinfo->value.enumerated.item = 4;
623 strcpy(uinfo->value.enumerated.name,
624 texts[uinfo->value.enumerated.item]);
625
626 return 0;
627 }
628
629 static int snd_mts64_ctl_smpte_fps_get(struct snd_kcontrol *kctl,
630 struct snd_ctl_elem_value *uctl)
631 {
632 struct mts64 *mts = snd_kcontrol_chip(kctl);
633
634 spin_lock_irq(&mts->lock);
635 uctl->value.enumerated.item[0] = mts->fps;
636 spin_unlock_irq(&mts->lock);
637
638 return 0;
639 }
640
641 static int snd_mts64_ctl_smpte_fps_put(struct snd_kcontrol *kctl,
642 struct snd_ctl_elem_value *uctl)
643 {
644 struct mts64 *mts = snd_kcontrol_chip(kctl);
645 int changed = 0;
646
647 spin_lock_irq(&mts->lock);
648 if (mts->fps != uctl->value.enumerated.item[0]) {
649 changed = 1;
650 mts->fps = uctl->value.enumerated.item[0];
651 }
652 spin_unlock_irq(&mts->lock);
653
654 return changed;
655 }
656
657 static struct snd_kcontrol_new mts64_ctl_smpte_fps __devinitdata = {
658 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
659 .name = "SMPTE Fps",
660 .index = 0,
661 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
662 .private_value = 0,
663 .info = snd_mts64_ctl_smpte_fps_info,
664 .get = snd_mts64_ctl_smpte_fps_get,
665 .put = snd_mts64_ctl_smpte_fps_put
666 };
667
668
669 static int __devinit snd_mts64_ctl_create(struct snd_card *card,
670 struct mts64 *mts)
671 {
672 int err, i;
673 static struct snd_kcontrol_new *control[] = {
674 &mts64_ctl_smpte_switch,
675 &mts64_ctl_smpte_time_hours,
676 &mts64_ctl_smpte_time_minutes,
677 &mts64_ctl_smpte_time_seconds,
678 &mts64_ctl_smpte_time_frames,
679 &mts64_ctl_smpte_fps,
680 NULL };
681
682 for (i = 0; control[i]; ++i) {
683 err = snd_ctl_add(card, snd_ctl_new1(control[i], mts));
684 if (err < 0) {
685 snd_printd("Cannot create control: %s\n",
686 control[i]->name);
687 return err;
688 }
689 }
690
691 return 0;
692 }
693
694 /*********************************************************************
695 * Rawmidi
696 *********************************************************************/
697 #define MTS64_MODE_INPUT_TRIGGERED 0x01
698
699 static int snd_mts64_rawmidi_open(struct snd_rawmidi_substream *substream)
700 {
701 struct mts64 *mts = substream->rmidi->private_data;
702
703 if (mts->open_count == 0) {
704 /* We don't need a spinlock here, because this is just called
705 if the device has not been opened before.
706 So there aren't any IRQs from the device */
707 mts64_device_open(mts);
708
709 msleep(50);
710 }
711 ++(mts->open_count);
712
713 return 0;
714 }
715
716 static int snd_mts64_rawmidi_close(struct snd_rawmidi_substream *substream)
717 {
718 struct mts64 *mts = substream->rmidi->private_data;
719 unsigned long flags;
720
721 --(mts->open_count);
722 if (mts->open_count == 0) {
723 /* We need the spinlock_irqsave here because we can still
724 have IRQs at this point */
725 spin_lock_irqsave(&mts->lock, flags);
726 mts64_device_close(mts);
727 spin_unlock_irqrestore(&mts->lock, flags);
728
729 msleep(500);
730
731 } else if (mts->open_count < 0)
732 mts->open_count = 0;
733
734 return 0;
735 }
736
737 static void snd_mts64_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,
738 int up)
739 {
740 struct mts64 *mts = substream->rmidi->private_data;
741 u8 data;
742 unsigned long flags;
743
744 spin_lock_irqsave(&mts->lock, flags);
745 while (snd_rawmidi_transmit_peek(substream, &data, 1) == 1) {
746 mts64_write_midi(mts, data, substream->number+1);
747 snd_rawmidi_transmit_ack(substream, 1);
748 }
749 spin_unlock_irqrestore(&mts->lock, flags);
750 }
751
752 static void snd_mts64_rawmidi_input_trigger(struct snd_rawmidi_substream *substream,
753 int up)
754 {
755 struct mts64 *mts = substream->rmidi->private_data;
756 unsigned long flags;
757
758 spin_lock_irqsave(&mts->lock, flags);
759 if (up)
760 mts->mode[substream->number] |= MTS64_MODE_INPUT_TRIGGERED;
761 else
762 mts->mode[substream->number] &= ~MTS64_MODE_INPUT_TRIGGERED;
763
764 spin_unlock_irqrestore(&mts->lock, flags);
765 }
766
767 static struct snd_rawmidi_ops snd_mts64_rawmidi_output_ops = {
768 .open = snd_mts64_rawmidi_open,
769 .close = snd_mts64_rawmidi_close,
770 .trigger = snd_mts64_rawmidi_output_trigger
771 };
772
773 static struct snd_rawmidi_ops snd_mts64_rawmidi_input_ops = {
774 .open = snd_mts64_rawmidi_open,
775 .close = snd_mts64_rawmidi_close,
776 .trigger = snd_mts64_rawmidi_input_trigger
777 };
778
779 /* Create and initialize the rawmidi component */
780 static int __devinit snd_mts64_rawmidi_create(struct snd_card *card)
781 {
782 struct mts64 *mts = card->private_data;
783 struct snd_rawmidi *rmidi;
784 struct snd_rawmidi_substream *substream;
785 struct list_head *list;
786 int err;
787
788 err = snd_rawmidi_new(card, CARD_NAME, 0,
789 MTS64_NUM_OUTPUT_PORTS,
790 MTS64_NUM_INPUT_PORTS,
791 &rmidi);
792 if (err < 0)
793 return err;
794
795 rmidi->private_data = mts;
796 strcpy(rmidi->name, CARD_NAME);
797 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
798 SNDRV_RAWMIDI_INFO_INPUT |
799 SNDRV_RAWMIDI_INFO_DUPLEX;
800
801 mts->rmidi = rmidi;
802
803 /* register rawmidi ops */
804 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
805 &snd_mts64_rawmidi_output_ops);
806 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
807 &snd_mts64_rawmidi_input_ops);
808
809 /* name substreams */
810 /* output */
811 list_for_each(list,
812 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
813 substream = list_entry(list, struct snd_rawmidi_substream, list);
814 sprintf(substream->name,
815 "Miditerminal %d", substream->number+1);
816 }
817 /* input */
818 list_for_each(list,
819 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
820 substream = list_entry(list, struct snd_rawmidi_substream, list);
821 mts->midi_input_substream[substream->number] = substream;
822 switch(substream->number) {
823 case MTS64_SMPTE_SUBSTREAM:
824 strcpy(substream->name, "Miditerminal SMPTE");
825 break;
826 default:
827 sprintf(substream->name,
828 "Miditerminal %d", substream->number+1);
829 }
830 }
831
832 /* controls */
833 err = snd_mts64_ctl_create(card, mts);
834
835 return err;
836 }
837
838 /*********************************************************************
839 * parport stuff
840 *********************************************************************/
841 static void snd_mts64_interrupt(int irq, void *private)
842 {
843 struct mts64 *mts = ((struct snd_card*)private)->private_data;
844 u16 ret;
845 u8 status, data;
846 struct snd_rawmidi_substream *substream;
847
848 spin_lock(&mts->lock);
849 ret = mts64_read(mts->pardev->port);
850 data = ret & 0x00ff;
851 status = ret >> 8;
852
853 if (status & MTS64_STAT_PORT) {
854 mts->current_midi_input_port = mts64_map_midi_input(data);
855 } else {
856 if (mts->current_midi_input_port == -1)
857 goto __out;
858 substream = mts->midi_input_substream[mts->current_midi_input_port];
859 if (mts->mode[substream->number] & MTS64_MODE_INPUT_TRIGGERED)
860 snd_rawmidi_receive(substream, &data, 1);
861 }
862 __out:
863 spin_unlock(&mts->lock);
864 }
865
866 static int __devinit snd_mts64_probe_port(struct parport *p)
867 {
868 struct pardevice *pardev;
869 int res;
870
871 pardev = parport_register_device(p, DRIVER_NAME,
872 NULL, NULL, NULL,
873 0, NULL);
874 if (!pardev)
875 return -EIO;
876
877 if (parport_claim(pardev)) {
878 parport_unregister_device(pardev);
879 return -EIO;
880 }
881
882 res = mts64_probe(p);
883
884 parport_release(pardev);
885 parport_unregister_device(pardev);
886
887 return res;
888 }
889
890 static void __devinit snd_mts64_attach(struct parport *p)
891 {
892 struct platform_device *device;
893
894 device = platform_device_alloc(PLATFORM_DRIVER, device_count);
895 if (!device)
896 return;
897
898 /* Temporary assignment to forward the parport */
899 platform_set_drvdata(device, p);
900
901 if (platform_device_register(device) < 0) {
902 platform_device_put(device);
903 return;
904 }
905
906 /* Since we dont get the return value of probe
907 * We need to check if device probing succeeded or not */
908 if (!platform_get_drvdata(device)) {
909 platform_device_unregister(device);
910 return;
911 }
912
913 /* register device in global table */
914 platform_devices[device_count] = device;
915 device_count++;
916 }
917
918 static void snd_mts64_detach(struct parport *p)
919 {
920 /* nothing to do here */
921 }
922
923 static struct parport_driver mts64_parport_driver = {
924 .name = "mts64",
925 .attach = snd_mts64_attach,
926 .detach = snd_mts64_detach
927 };
928
929 /*********************************************************************
930 * platform stuff
931 *********************************************************************/
932 static void snd_mts64_card_private_free(struct snd_card *card)
933 {
934 struct mts64 *mts = card->private_data;
935 struct pardevice *pardev = mts->pardev;
936
937 if (pardev) {
938 if (mts->pardev_claimed)
939 parport_release(pardev);
940 parport_unregister_device(pardev);
941 }
942
943 snd_mts64_free(mts);
944 }
945
946 static int __devinit snd_mts64_probe(struct platform_device *pdev)
947 {
948 struct pardevice *pardev;
949 struct parport *p;
950 int dev = pdev->id;
951 struct snd_card *card = NULL;
952 struct mts64 *mts = NULL;
953 int err;
954
955 p = platform_get_drvdata(pdev);
956 platform_set_drvdata(pdev, NULL);
957
958 if (dev >= SNDRV_CARDS)
959 return -ENODEV;
960 if (!enable[dev])
961 return -ENOENT;
962 if ((err = snd_mts64_probe_port(p)) < 0)
963 return err;
964
965 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
966 if (card == NULL) {
967 snd_printd("Cannot create card\n");
968 return -ENOMEM;
969 }
970 strcpy(card->driver, DRIVER_NAME);
971 strcpy(card->shortname, "ESI " CARD_NAME);
972 sprintf(card->longname, "%s at 0x%lx, irq %i",
973 card->shortname, p->base, p->irq);
974
975 pardev = parport_register_device(p, /* port */
976 DRIVER_NAME, /* name */
977 NULL, /* preempt */
978 NULL, /* wakeup */
979 snd_mts64_interrupt, /* ISR */
980 PARPORT_DEV_EXCL, /* flags */
981 (void *)card); /* private */
982 if (pardev == NULL) {
983 snd_printd("Cannot register pardevice\n");
984 err = -EIO;
985 goto __err;
986 }
987
988 if ((err = snd_mts64_create(card, pardev, &mts)) < 0) {
989 snd_printd("Cannot create main component\n");
990 parport_unregister_device(pardev);
991 goto __err;
992 }
993 card->private_data = mts;
994 card->private_free = snd_mts64_card_private_free;
995
996 if ((err = snd_mts64_rawmidi_create(card)) < 0) {
997 snd_printd("Creating Rawmidi component failed\n");
998 goto __err;
999 }
1000
1001 /* claim parport */
1002 if (parport_claim(pardev)) {
1003 snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base);
1004 err = -EIO;
1005 goto __err;
1006 }
1007 mts->pardev_claimed = 1;
1008
1009 /* init device */
1010 if ((err = mts64_device_init(p)) < 0)
1011 goto __err;
1012
1013 platform_set_drvdata(pdev, card);
1014
1015 /* At this point card will be usable */
1016 if ((err = snd_card_register(card)) < 0) {
1017 snd_printd("Cannot register card\n");
1018 goto __err;
1019 }
1020
1021 snd_printk("ESI Miditerminal 4140 on 0x%lx\n", p->base);
1022 return 0;
1023
1024 __err:
1025 snd_card_free(card);
1026 return err;
1027 }
1028
1029 static int snd_mts64_remove(struct platform_device *pdev)
1030 {
1031 struct snd_card *card = platform_get_drvdata(pdev);
1032
1033 if (card)
1034 snd_card_free(card);
1035
1036 return 0;
1037 }
1038
1039
1040 static struct platform_driver snd_mts64_driver = {
1041 .probe = snd_mts64_probe,
1042 .remove = snd_mts64_remove,
1043 .driver = {
1044 .name = PLATFORM_DRIVER
1045 }
1046 };
1047
1048 /*********************************************************************
1049 * module init stuff
1050 *********************************************************************/
1051 static void snd_mts64_unregister_all(void)
1052 {
1053 int i;
1054
1055 for (i = 0; i < SNDRV_CARDS; ++i) {
1056 if (platform_devices[i]) {
1057 platform_device_unregister(platform_devices[i]);
1058 platform_devices[i] = NULL;
1059 }
1060 }
1061 platform_driver_unregister(&snd_mts64_driver);
1062 parport_unregister_driver(&mts64_parport_driver);
1063 }
1064
1065 static int __init snd_mts64_module_init(void)
1066 {
1067 int err;
1068
1069 if ((err = platform_driver_register(&snd_mts64_driver)) < 0)
1070 return err;
1071
1072 if (parport_register_driver(&mts64_parport_driver) != 0) {
1073 platform_driver_unregister(&snd_mts64_driver);
1074 return -EIO;
1075 }
1076
1077 if (device_count == 0) {
1078 snd_mts64_unregister_all();
1079 return -ENODEV;
1080 }
1081
1082 return 0;
1083 }
1084
1085 static void __exit snd_mts64_module_exit(void)
1086 {
1087 snd_mts64_unregister_all();
1088 }
1089
1090 module_init(snd_mts64_module_init);
1091 module_exit(snd_mts64_module_exit);
Support for the Chinese Samsung S3C2440 based development boards