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drm/radeon/kms: memset the allocated framebuffer before using it.
[linux-2.6/mini2440.git] / sound / drivers / mts64.c
blob9284829bf9275e9c2afabbbe8e2026c35c2dfb60
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 <linux/init.h>
22 #include <linux/platform_device.h>
23 #include <linux/parport.h>
24 #include <linux/spinlock.h>
25 #include <linux/delay.h>
26 #include <sound/core.h>
27 #include <sound/initval.h>
28 #include <sound/rawmidi.h>
29 #include <sound/control.h>
30
31 #define CARD_NAME "Miditerminal 4140"
32 #define DRIVER_NAME "MTS64"
33 #define PLATFORM_DRIVER "snd_mts64"
34
35 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
36 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
37 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
38
39 static struct platform_device *platform_devices[SNDRV_CARDS];
40 static int device_count;
41
42 module_param_array(index, int, NULL, S_IRUGO);
43 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
44 module_param_array(id, charp, NULL, S_IRUGO);
45 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
46 module_param_array(enable, bool, NULL, S_IRUGO);
47 MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
48
49 MODULE_AUTHOR("Matthias Koenig <mk@phasorlab.de>");
50 MODULE_DESCRIPTION("ESI Miditerminal 4140");
51 MODULE_LICENSE("GPL");
52 MODULE_SUPPORTED_DEVICE("{{ESI,Miditerminal 4140}}");
53
54 /*********************************************************************
55 * Chip specific
56 *********************************************************************/
57 #define MTS64_NUM_INPUT_PORTS 5
58 #define MTS64_NUM_OUTPUT_PORTS 4
59 #define MTS64_SMPTE_SUBSTREAM 4
60
61 struct mts64 {
62 spinlock_t lock;
63 struct snd_card *card;
64 struct snd_rawmidi *rmidi;
65 struct pardevice *pardev;
66 int pardev_claimed;
67
68 int open_count;
69 int current_midi_output_port;
70 int current_midi_input_port;
71 u8 mode[MTS64_NUM_INPUT_PORTS];
72 struct snd_rawmidi_substream *midi_input_substream[MTS64_NUM_INPUT_PORTS];
73 int smpte_switch;
74 u8 time[4]; /* [0]=hh, [1]=mm, [2]=ss, [3]=ff */
75 u8 fps;
76 };
77
78 static int snd_mts64_free(struct mts64 *mts)
79 {
80 kfree(mts);
81 return 0;
82 }
83
84 static int __devinit snd_mts64_create(struct snd_card *card,
85 struct pardevice *pardev,
86 struct mts64 **rchip)
87 {
88 struct mts64 *mts;
89
90 *rchip = NULL;
91
92 mts = kzalloc(sizeof(struct mts64), GFP_KERNEL);
93 if (mts == NULL)
94 return -ENOMEM;
95
96 /* Init chip specific data */
97 spin_lock_init(&mts->lock);
98 mts->card = card;
99 mts->pardev = pardev;
100 mts->current_midi_output_port = -1;
101 mts->current_midi_input_port = -1;
102
103 *rchip = mts;
104
105 return 0;
106 }
107
108 /*********************************************************************
109 * HW register related constants
110 *********************************************************************/
111
112 /* Status Bits */
113 #define MTS64_STAT_BSY 0x80
114 #define MTS64_STAT_BIT_SET 0x20 /* readout process, bit is set */
115 #define MTS64_STAT_PORT 0x10 /* read byte is a port number */
116
117 /* Control Bits */
118 #define MTS64_CTL_READOUT 0x08 /* enable readout */
119 #define MTS64_CTL_WRITE_CMD 0x06
120 #define MTS64_CTL_WRITE_DATA 0x02
121 #define MTS64_CTL_STROBE 0x01
122
123 /* Command */
124 #define MTS64_CMD_RESET 0xfe
125 #define MTS64_CMD_PROBE 0x8f /* Used in probing procedure */
126 #define MTS64_CMD_SMPTE_SET_TIME 0xe8
127 #define MTS64_CMD_SMPTE_SET_FPS 0xee
128 #define MTS64_CMD_SMPTE_STOP 0xef
129 #define MTS64_CMD_SMPTE_FPS_24 0xe3
130 #define MTS64_CMD_SMPTE_FPS_25 0xe2
131 #define MTS64_CMD_SMPTE_FPS_2997 0xe4
132 #define MTS64_CMD_SMPTE_FPS_30D 0xe1
133 #define MTS64_CMD_SMPTE_FPS_30 0xe0
134 #define MTS64_CMD_COM_OPEN 0xf8 /* setting the communication mode */
135 #define MTS64_CMD_COM_CLOSE1 0xff /* clearing communication mode */
136 #define MTS64_CMD_COM_CLOSE2 0xf5
137
138 /*********************************************************************
139 * Hardware specific functions
140 *********************************************************************/
141 static void mts64_enable_readout(struct parport *p);
142 static void mts64_disable_readout(struct parport *p);
143 static int mts64_device_ready(struct parport *p);
144 static int mts64_device_init(struct parport *p);
145 static int mts64_device_open(struct mts64 *mts);
146 static int mts64_device_close(struct mts64 *mts);
147 static u8 mts64_map_midi_input(u8 c);
148 static int mts64_probe(struct parport *p);
149 static u16 mts64_read(struct parport *p);
150 static u8 mts64_read_char(struct parport *p);
151 static void mts64_smpte_start(struct parport *p,
152 u8 hours, u8 minutes,
153 u8 seconds, u8 frames,
154 u8 idx);
155 static void mts64_smpte_stop(struct parport *p);
156 static void mts64_write_command(struct parport *p, u8 c);
157 static void mts64_write_data(struct parport *p, u8 c);
158 static void mts64_write_midi(struct mts64 *mts, u8 c, int midiport);
159
160
161 /* Enables the readout procedure
162 *
163 * Before we can read a midi byte from the device, we have to set
164 * bit 3 of control port.
165 */
166 static void mts64_enable_readout(struct parport *p)
167 {
168 u8 c;
169
170 c = parport_read_control(p);
171 c |= MTS64_CTL_READOUT;
172 parport_write_control(p, c);
173 }
174
175 /* Disables readout
176 *
177 * Readout is disabled by clearing bit 3 of control
178 */
179 static void mts64_disable_readout(struct parport *p)
180 {
181 u8 c;
182
183 c = parport_read_control(p);
184 c &= ~MTS64_CTL_READOUT;
185 parport_write_control(p, c);
186 }
187
188 /* waits for device ready
189 *
190 * Checks if BUSY (Bit 7 of status) is clear
191 * 1 device ready
192 * 0 failure
193 */
194 static int mts64_device_ready(struct parport *p)
195 {
196 int i;
197 u8 c;
198
199 for (i = 0; i < 0xffff; ++i) {
200 c = parport_read_status(p);
201 c &= MTS64_STAT_BSY;
202 if (c != 0)
203 return 1;
204 }
205
206 return 0;
207 }
208
209 /* Init device (LED blinking startup magic)
210 *
211 * Returns:
212 * 0 init ok
213 * -EIO failure
214 */
215 static int __devinit mts64_device_init(struct parport *p)
216 {
217 int i;
218
219 mts64_write_command(p, MTS64_CMD_RESET);
220
221 for (i = 0; i < 64; ++i) {
222 msleep(100);
223
224 if (mts64_probe(p) == 0) {
225 /* success */
226 mts64_disable_readout(p);
227 return 0;
228 }
229 }
230 mts64_disable_readout(p);
231
232 return -EIO;
233 }
234
235 /*
236 * Opens the device (set communication mode)
237 */
238 static int mts64_device_open(struct mts64 *mts)
239 {
240 int i;
241 struct parport *p = mts->pardev->port;
242
243 for (i = 0; i < 5; ++i)
244 mts64_write_command(p, MTS64_CMD_COM_OPEN);
245
246 return 0;
247 }
248
249 /*
250 * Close device (clear communication mode)
251 */
252 static int mts64_device_close(struct mts64 *mts)
253 {
254 int i;
255 struct parport *p = mts->pardev->port;
256
257 for (i = 0; i < 5; ++i) {
258 mts64_write_command(p, MTS64_CMD_COM_CLOSE1);
259 mts64_write_command(p, MTS64_CMD_COM_CLOSE2);
260 }
261
262 return 0;
263 }
264
265 /* map hardware port to substream number
266 *
267 * When reading a byte from the device, the device tells us
268 * on what port the byte is. This HW port has to be mapped to
269 * the midiport (substream number).
270 * substream 0-3 are Midiports 1-4
271 * substream 4 is SMPTE Timecode
272 * The mapping is done by the table:
273 * HW | 0 | 1 | 2 | 3 | 4
274 * SW | 0 | 1 | 4 | 2 | 3
275 */
276 static u8 mts64_map_midi_input(u8 c)
277 {
278 static u8 map[] = { 0, 1, 4, 2, 3 };
279
280 return map[c];
281 }
282
283
284 /* Probe parport for device
285 *
286 * Do we have a Miditerminal 4140 on parport?
287 * Returns:
288 * 0 device found
289 * -ENODEV no device
290 */
291 static int __devinit mts64_probe(struct parport *p)
292 {
293 u8 c;
294
295 mts64_smpte_stop(p);
296 mts64_write_command(p, MTS64_CMD_PROBE);
297
298 msleep(50);
299
300 c = mts64_read(p);
301
302 c &= 0x00ff;
303 if (c != MTS64_CMD_PROBE)
304 return -ENODEV;
305 else
306 return 0;
307
308 }
309
310 /* Read byte incl. status from device
311 *
312 * Returns:
313 * data in lower 8 bits and status in upper 8 bits
314 */
315 static u16 mts64_read(struct parport *p)
316 {
317 u8 data, status;
318
319 mts64_device_ready(p);
320 mts64_enable_readout(p);
321 status = parport_read_status(p);
322 data = mts64_read_char(p);
323 mts64_disable_readout(p);
324
325 return (status << 8) | data;
326 }
327
328 /* Read a byte from device
329 *
330 * Note, that readout mode has to be enabled.
331 * readout procedure is as follows:
332 * - Write number of the Bit to read to DATA
333 * - Read STATUS
334 * - Bit 5 of STATUS indicates if Bit is set
335 *
336 * Returns:
337 * Byte read from device
338 */
339 static u8 mts64_read_char(struct parport *p)
340 {
341 u8 c = 0;
342 u8 status;
343 u8 i;
344
345 for (i = 0; i < 8; ++i) {
346 parport_write_data(p, i);
347 c >>= 1;
348 status = parport_read_status(p);
349 if (status & MTS64_STAT_BIT_SET)
350 c |= 0x80;
351 }
352
353 return c;
354 }
355
356 /* Starts SMPTE Timecode generation
357 *
358 * The device creates SMPTE Timecode by hardware.
359 * 0 24 fps
360 * 1 25 fps
361 * 2 29.97 fps
362 * 3 30 fps (Drop-frame)
363 * 4 30 fps
364 */
365 static void mts64_smpte_start(struct parport *p,
366 u8 hours, u8 minutes,
367 u8 seconds, u8 frames,
368 u8 idx)
369 {
370 static u8 fps[5] = { MTS64_CMD_SMPTE_FPS_24,
371 MTS64_CMD_SMPTE_FPS_25,
372 MTS64_CMD_SMPTE_FPS_2997,
373 MTS64_CMD_SMPTE_FPS_30D,
374 MTS64_CMD_SMPTE_FPS_30 };
375
376 mts64_write_command(p, MTS64_CMD_SMPTE_SET_TIME);
377 mts64_write_command(p, frames);
378 mts64_write_command(p, seconds);
379 mts64_write_command(p, minutes);
380 mts64_write_command(p, hours);
381
382 mts64_write_command(p, MTS64_CMD_SMPTE_SET_FPS);
383 mts64_write_command(p, fps[idx]);
384 }
385
386 /* Stops SMPTE Timecode generation
387 */
388 static void mts64_smpte_stop(struct parport *p)
389 {
390 mts64_write_command(p, MTS64_CMD_SMPTE_STOP);
391 }
392
393 /* Write a command byte to device
394 */
395 static void mts64_write_command(struct parport *p, u8 c)
396 {
397 mts64_device_ready(p);
398
399 parport_write_data(p, c);
400
401 parport_write_control(p, MTS64_CTL_WRITE_CMD);
402 parport_write_control(p, MTS64_CTL_WRITE_CMD | MTS64_CTL_STROBE);
403 parport_write_control(p, MTS64_CTL_WRITE_CMD);
404 }
405
406 /* Write a data byte to device
407 */
408 static void mts64_write_data(struct parport *p, u8 c)
409 {
410 mts64_device_ready(p);
411
412 parport_write_data(p, c);
413
414 parport_write_control(p, MTS64_CTL_WRITE_DATA);
415 parport_write_control(p, MTS64_CTL_WRITE_DATA | MTS64_CTL_STROBE);
416 parport_write_control(p, MTS64_CTL_WRITE_DATA);
417 }
418
419 /* Write a MIDI byte to midiport
420 *
421 * midiport ranges from 0-3 and maps to Ports 1-4
422 * assumptions: communication mode is on
423 */
424 static void mts64_write_midi(struct mts64 *mts, u8 c,
425 int midiport)
426 {
427 struct parport *p = mts->pardev->port;
428
429 /* check current midiport */
430 if (mts->current_midi_output_port != midiport)
431 mts64_write_command(p, midiport);
432
433 /* write midi byte */
434 mts64_write_data(p, c);
435 }
436
437 /*********************************************************************
438 * Control elements
439 *********************************************************************/
440
441 /* SMPTE Switch */
442 #define snd_mts64_ctl_smpte_switch_info snd_ctl_boolean_mono_info
443
444 static int snd_mts64_ctl_smpte_switch_get(struct snd_kcontrol* kctl,
445 struct snd_ctl_elem_value *uctl)
446 {
447 struct mts64 *mts = snd_kcontrol_chip(kctl);
448
449 spin_lock_irq(&mts->lock);
450 uctl->value.integer.value[0] = mts->smpte_switch;
451 spin_unlock_irq(&mts->lock);
452
453 return 0;
454 }
455
456 /* smpte_switch is not accessed from IRQ handler, so we just need
457 to protect the HW access */
458 static int snd_mts64_ctl_smpte_switch_put(struct snd_kcontrol* kctl,
459 struct snd_ctl_elem_value *uctl)
460 {
461 struct mts64 *mts = snd_kcontrol_chip(kctl);
462 int changed = 0;
463 int val = !!uctl->value.integer.value[0];
464
465 spin_lock_irq(&mts->lock);
466 if (mts->smpte_switch == val)
467 goto __out;
468
469 changed = 1;
470 mts->smpte_switch = val;
471 if (mts->smpte_switch) {
472 mts64_smpte_start(mts->pardev->port,
473 mts->time[0], mts->time[1],
474 mts->time[2], mts->time[3],
475 mts->fps);
476 } else {
477 mts64_smpte_stop(mts->pardev->port);
478 }
479 __out:
480 spin_unlock_irq(&mts->lock);
481 return changed;
482 }
483
484 static struct snd_kcontrol_new mts64_ctl_smpte_switch __devinitdata = {
485 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
486 .name = "SMPTE Playback Switch",
487 .index = 0,
488 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
489 .private_value = 0,
490 .info = snd_mts64_ctl_smpte_switch_info,
491 .get = snd_mts64_ctl_smpte_switch_get,
492 .put = snd_mts64_ctl_smpte_switch_put
493 };
494
495 /* Time */
496 static int snd_mts64_ctl_smpte_time_h_info(struct snd_kcontrol *kctl,
497 struct snd_ctl_elem_info *uinfo)
498 {
499 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
500 uinfo->count = 1;
501 uinfo->value.integer.min = 0;
502 uinfo->value.integer.max = 23;
503 return 0;
504 }
505
506 static int snd_mts64_ctl_smpte_time_f_info(struct snd_kcontrol *kctl,
507 struct snd_ctl_elem_info *uinfo)
508 {
509 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
510 uinfo->count = 1;
511 uinfo->value.integer.min = 0;
512 uinfo->value.integer.max = 99;
513 return 0;
514 }
515
516 static int snd_mts64_ctl_smpte_time_info(struct snd_kcontrol *kctl,
517 struct snd_ctl_elem_info *uinfo)
518 {
519 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
520 uinfo->count = 1;
521 uinfo->value.integer.min = 0;
522 uinfo->value.integer.max = 59;
523 return 0;
524 }
525
526 static int snd_mts64_ctl_smpte_time_get(struct snd_kcontrol *kctl,
527 struct snd_ctl_elem_value *uctl)
528 {
529 struct mts64 *mts = snd_kcontrol_chip(kctl);
530 int idx = kctl->private_value;
531
532 spin_lock_irq(&mts->lock);
533 uctl->value.integer.value[0] = mts->time[idx];
534 spin_unlock_irq(&mts->lock);
535
536 return 0;
537 }
538
539 static int snd_mts64_ctl_smpte_time_put(struct snd_kcontrol *kctl,
540 struct snd_ctl_elem_value *uctl)
541 {
542 struct mts64 *mts = snd_kcontrol_chip(kctl);
543 int idx = kctl->private_value;
544 unsigned int time = uctl->value.integer.value[0] % 60;
545 int changed = 0;
546
547 spin_lock_irq(&mts->lock);
548 if (mts->time[idx] != time) {
549 changed = 1;
550 mts->time[idx] = time;
551 }
552 spin_unlock_irq(&mts->lock);
553
554 return changed;
555 }
556
557 static struct snd_kcontrol_new mts64_ctl_smpte_time_hours __devinitdata = {
558 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
559 .name = "SMPTE Time Hours",
560 .index = 0,
561 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
562 .private_value = 0,
563 .info = snd_mts64_ctl_smpte_time_h_info,
564 .get = snd_mts64_ctl_smpte_time_get,
565 .put = snd_mts64_ctl_smpte_time_put
566 };
567
568 static struct snd_kcontrol_new mts64_ctl_smpte_time_minutes __devinitdata = {
569 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
570 .name = "SMPTE Time Minutes",
571 .index = 0,
572 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
573 .private_value = 1,
574 .info = snd_mts64_ctl_smpte_time_info,
575 .get = snd_mts64_ctl_smpte_time_get,
576 .put = snd_mts64_ctl_smpte_time_put
577 };
578
579 static struct snd_kcontrol_new mts64_ctl_smpte_time_seconds __devinitdata = {
580 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
581 .name = "SMPTE Time Seconds",
582 .index = 0,
583 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
584 .private_value = 2,
585 .info = snd_mts64_ctl_smpte_time_info,
586 .get = snd_mts64_ctl_smpte_time_get,
587 .put = snd_mts64_ctl_smpte_time_put
588 };
589
590 static struct snd_kcontrol_new mts64_ctl_smpte_time_frames __devinitdata = {
591 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
592 .name = "SMPTE Time Frames",
593 .index = 0,
594 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
595 .private_value = 3,
596 .info = snd_mts64_ctl_smpte_time_f_info,
597 .get = snd_mts64_ctl_smpte_time_get,
598 .put = snd_mts64_ctl_smpte_time_put
599 };
600
601 /* FPS */
602 static int snd_mts64_ctl_smpte_fps_info(struct snd_kcontrol *kctl,
603 struct snd_ctl_elem_info *uinfo)
604 {
605 static char *texts[5] = { "24",
606 "25",
607 "29.97",
608 "30D",
609 "30" };
610
611 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
612 uinfo->count = 1;
613 uinfo->value.enumerated.items = 5;
614 if (uinfo->value.enumerated.item > 4)
615 uinfo->value.enumerated.item = 4;
616 strcpy(uinfo->value.enumerated.name,
617 texts[uinfo->value.enumerated.item]);
618
619 return 0;
620 }
621
622 static int snd_mts64_ctl_smpte_fps_get(struct snd_kcontrol *kctl,
623 struct snd_ctl_elem_value *uctl)
624 {
625 struct mts64 *mts = snd_kcontrol_chip(kctl);
626
627 spin_lock_irq(&mts->lock);
628 uctl->value.enumerated.item[0] = mts->fps;
629 spin_unlock_irq(&mts->lock);
630
631 return 0;
632 }
633
634 static int snd_mts64_ctl_smpte_fps_put(struct snd_kcontrol *kctl,
635 struct snd_ctl_elem_value *uctl)
636 {
637 struct mts64 *mts = snd_kcontrol_chip(kctl);
638 int changed = 0;
639
640 if (uctl->value.enumerated.item[0] >= 5)
641 return -EINVAL;
642 spin_lock_irq(&mts->lock);
643 if (mts->fps != uctl->value.enumerated.item[0]) {
644 changed = 1;
645 mts->fps = uctl->value.enumerated.item[0];
646 }
647 spin_unlock_irq(&mts->lock);
648
649 return changed;
650 }
651
652 static struct snd_kcontrol_new mts64_ctl_smpte_fps __devinitdata = {
653 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
654 .name = "SMPTE Fps",
655 .index = 0,
656 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
657 .private_value = 0,
658 .info = snd_mts64_ctl_smpte_fps_info,
659 .get = snd_mts64_ctl_smpte_fps_get,
660 .put = snd_mts64_ctl_smpte_fps_put
661 };
662
663
664 static int __devinit snd_mts64_ctl_create(struct snd_card *card,
665 struct mts64 *mts)
666 {
667 int err, i;
668 static struct snd_kcontrol_new *control[] __devinitdata = {
669 &mts64_ctl_smpte_switch,
670 &mts64_ctl_smpte_time_hours,
671 &mts64_ctl_smpte_time_minutes,
672 &mts64_ctl_smpte_time_seconds,
673 &mts64_ctl_smpte_time_frames,
674 &mts64_ctl_smpte_fps,
675 NULL };
676
677 for (i = 0; control[i]; ++i) {
678 err = snd_ctl_add(card, snd_ctl_new1(control[i], mts));
679 if (err < 0) {
680 snd_printd("Cannot create control: %s\n",
681 control[i]->name);
682 return err;
683 }
684 }
685
686 return 0;
687 }
688
689 /*********************************************************************
690 * Rawmidi
691 *********************************************************************/
692 #define MTS64_MODE_INPUT_TRIGGERED 0x01
693
694 static int snd_mts64_rawmidi_open(struct snd_rawmidi_substream *substream)
695 {
696 struct mts64 *mts = substream->rmidi->private_data;
697
698 if (mts->open_count == 0) {
699 /* We don't need a spinlock here, because this is just called
700 if the device has not been opened before.
701 So there aren't any IRQs from the device */
702 mts64_device_open(mts);
703
704 msleep(50);
705 }
706 ++(mts->open_count);
707
708 return 0;
709 }
710
711 static int snd_mts64_rawmidi_close(struct snd_rawmidi_substream *substream)
712 {
713 struct mts64 *mts = substream->rmidi->private_data;
714 unsigned long flags;
715
716 --(mts->open_count);
717 if (mts->open_count == 0) {
718 /* We need the spinlock_irqsave here because we can still
719 have IRQs at this point */
720 spin_lock_irqsave(&mts->lock, flags);
721 mts64_device_close(mts);
722 spin_unlock_irqrestore(&mts->lock, flags);
723
724 msleep(500);
725
726 } else if (mts->open_count < 0)
727 mts->open_count = 0;
728
729 return 0;
730 }
731
732 static void snd_mts64_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,
733 int up)
734 {
735 struct mts64 *mts = substream->rmidi->private_data;
736 u8 data;
737 unsigned long flags;
738
739 spin_lock_irqsave(&mts->lock, flags);
740 while (snd_rawmidi_transmit_peek(substream, &data, 1) == 1) {
741 mts64_write_midi(mts, data, substream->number+1);
742 snd_rawmidi_transmit_ack(substream, 1);
743 }
744 spin_unlock_irqrestore(&mts->lock, flags);
745 }
746
747 static void snd_mts64_rawmidi_input_trigger(struct snd_rawmidi_substream *substream,
748 int up)
749 {
750 struct mts64 *mts = substream->rmidi->private_data;
751 unsigned long flags;
752
753 spin_lock_irqsave(&mts->lock, flags);
754 if (up)
755 mts->mode[substream->number] |= MTS64_MODE_INPUT_TRIGGERED;
756 else
757 mts->mode[substream->number] &= ~MTS64_MODE_INPUT_TRIGGERED;
758
759 spin_unlock_irqrestore(&mts->lock, flags);
760 }
761
762 static struct snd_rawmidi_ops snd_mts64_rawmidi_output_ops = {
763 .open = snd_mts64_rawmidi_open,
764 .close = snd_mts64_rawmidi_close,
765 .trigger = snd_mts64_rawmidi_output_trigger
766 };
767
768 static struct snd_rawmidi_ops snd_mts64_rawmidi_input_ops = {
769 .open = snd_mts64_rawmidi_open,
770 .close = snd_mts64_rawmidi_close,
771 .trigger = snd_mts64_rawmidi_input_trigger
772 };
773
774 /* Create and initialize the rawmidi component */
775 static int __devinit snd_mts64_rawmidi_create(struct snd_card *card)
776 {
777 struct mts64 *mts = card->private_data;
778 struct snd_rawmidi *rmidi;
779 struct snd_rawmidi_substream *substream;
780 struct list_head *list;
781 int err;
782
783 err = snd_rawmidi_new(card, CARD_NAME, 0,
784 MTS64_NUM_OUTPUT_PORTS,
785 MTS64_NUM_INPUT_PORTS,
786 &rmidi);
787 if (err < 0)
788 return err;
789
790 rmidi->private_data = mts;
791 strcpy(rmidi->name, CARD_NAME);
792 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
793 SNDRV_RAWMIDI_INFO_INPUT |
794 SNDRV_RAWMIDI_INFO_DUPLEX;
795
796 mts->rmidi = rmidi;
797
798 /* register rawmidi ops */
799 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
800 &snd_mts64_rawmidi_output_ops);
801 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
802 &snd_mts64_rawmidi_input_ops);
803
804 /* name substreams */
805 /* output */
806 list_for_each(list,
807 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
808 substream = list_entry(list, struct snd_rawmidi_substream, list);
809 sprintf(substream->name,
810 "Miditerminal %d", substream->number+1);
811 }
812 /* input */
813 list_for_each(list,
814 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
815 substream = list_entry(list, struct snd_rawmidi_substream, list);
816 mts->midi_input_substream[substream->number] = substream;
817 switch(substream->number) {
818 case MTS64_SMPTE_SUBSTREAM:
819 strcpy(substream->name, "Miditerminal SMPTE");
820 break;
821 default:
822 sprintf(substream->name,
823 "Miditerminal %d", substream->number+1);
824 }
825 }
826
827 /* controls */
828 err = snd_mts64_ctl_create(card, mts);
829
830 return err;
831 }
832
833 /*********************************************************************
834 * parport stuff
835 *********************************************************************/
836 static void snd_mts64_interrupt(void *private)
837 {
838 struct mts64 *mts = ((struct snd_card*)private)->private_data;
839 u16 ret;
840 u8 status, data;
841 struct snd_rawmidi_substream *substream;
842
843 spin_lock(&mts->lock);
844 ret = mts64_read(mts->pardev->port);
845 data = ret & 0x00ff;
846 status = ret >> 8;
847
848 if (status & MTS64_STAT_PORT) {
849 mts->current_midi_input_port = mts64_map_midi_input(data);
850 } else {
851 if (mts->current_midi_input_port == -1)
852 goto __out;
853 substream = mts->midi_input_substream[mts->current_midi_input_port];
854 if (mts->mode[substream->number] & MTS64_MODE_INPUT_TRIGGERED)
855 snd_rawmidi_receive(substream, &data, 1);
856 }
857 __out:
858 spin_unlock(&mts->lock);
859 }
860
861 static int __devinit snd_mts64_probe_port(struct parport *p)
862 {
863 struct pardevice *pardev;
864 int res;
865
866 pardev = parport_register_device(p, DRIVER_NAME,
867 NULL, NULL, NULL,
868 0, NULL);
869 if (!pardev)
870 return -EIO;
871
872 if (parport_claim(pardev)) {
873 parport_unregister_device(pardev);
874 return -EIO;
875 }
876
877 res = mts64_probe(p);
878
879 parport_release(pardev);
880 parport_unregister_device(pardev);
881
882 return res;
883 }
884
885 static void __devinit snd_mts64_attach(struct parport *p)
886 {
887 struct platform_device *device;
888
889 device = platform_device_alloc(PLATFORM_DRIVER, device_count);
890 if (!device)
891 return;
892
893 /* Temporary assignment to forward the parport */
894 platform_set_drvdata(device, p);
895
896 if (platform_device_add(device) < 0) {
897 platform_device_put(device);
898 return;
899 }
900
901 /* Since we dont get the return value of probe
902 * We need to check if device probing succeeded or not */
903 if (!platform_get_drvdata(device)) {
904 platform_device_unregister(device);
905 return;
906 }
907
908 /* register device in global table */
909 platform_devices[device_count] = device;
910 device_count++;
911 }
912
913 static void snd_mts64_detach(struct parport *p)
914 {
915 /* nothing to do here */
916 }
917
918 static struct parport_driver mts64_parport_driver = {
919 .name = "mts64",
920 .attach = snd_mts64_attach,
921 .detach = snd_mts64_detach
922 };
923
924 /*********************************************************************
925 * platform stuff
926 *********************************************************************/
927 static void snd_mts64_card_private_free(struct snd_card *card)
928 {
929 struct mts64 *mts = card->private_data;
930 struct pardevice *pardev = mts->pardev;
931
932 if (pardev) {
933 if (mts->pardev_claimed)
934 parport_release(pardev);
935 parport_unregister_device(pardev);
936 }
937
938 snd_mts64_free(mts);
939 }
940
941 static int __devinit snd_mts64_probe(struct platform_device *pdev)
942 {
943 struct pardevice *pardev;
944 struct parport *p;
945 int dev = pdev->id;
946 struct snd_card *card = NULL;
947 struct mts64 *mts = NULL;
948 int err;
949
950 p = platform_get_drvdata(pdev);
951 platform_set_drvdata(pdev, NULL);
952
953 if (dev >= SNDRV_CARDS)
954 return -ENODEV;
955 if (!enable[dev])
956 return -ENOENT;
957 if ((err = snd_mts64_probe_port(p)) < 0)
958 return err;
959
960 err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
961 if (err < 0) {
962 snd_printd("Cannot create card\n");
963 return err;
964 }
965 strcpy(card->driver, DRIVER_NAME);
966 strcpy(card->shortname, "ESI " CARD_NAME);
967 sprintf(card->longname, "%s at 0x%lx, irq %i",
968 card->shortname, p->base, p->irq);
969
970 pardev = parport_register_device(p, /* port */
971 DRIVER_NAME, /* name */
972 NULL, /* preempt */
973 NULL, /* wakeup */
974 snd_mts64_interrupt, /* ISR */
975 PARPORT_DEV_EXCL, /* flags */
976 (void *)card); /* private */
977 if (pardev == NULL) {
978 snd_printd("Cannot register pardevice\n");
979 err = -EIO;
980 goto __err;
981 }
982
983 if ((err = snd_mts64_create(card, pardev, &mts)) < 0) {
984 snd_printd("Cannot create main component\n");
985 parport_unregister_device(pardev);
986 goto __err;
987 }
988 card->private_data = mts;
989 card->private_free = snd_mts64_card_private_free;
990
991 if ((err = snd_mts64_rawmidi_create(card)) < 0) {
992 snd_printd("Creating Rawmidi component failed\n");
993 goto __err;
994 }
995
996 /* claim parport */
997 if (parport_claim(pardev)) {
998 snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base);
999 err = -EIO;
1000 goto __err;
1001 }
1002 mts->pardev_claimed = 1;
1003
1004 /* init device */
1005 if ((err = mts64_device_init(p)) < 0)
1006 goto __err;
1007
1008 platform_set_drvdata(pdev, card);
1009
1010 snd_card_set_dev(card, &pdev->dev);
1011
1012 /* At this point card will be usable */
1013 if ((err = snd_card_register(card)) < 0) {
1014 snd_printd("Cannot register card\n");
1015 goto __err;
1016 }
1017
1018 snd_printk(KERN_INFO "ESI Miditerminal 4140 on 0x%lx\n", p->base);
1019 return 0;
1020
1021 __err:
1022 snd_card_free(card);
1023 return err;
1024 }
1025
1026 static int __devexit snd_mts64_remove(struct platform_device *pdev)
1027 {
1028 struct snd_card *card = platform_get_drvdata(pdev);
1029
1030 if (card)
1031 snd_card_free(card);
1032
1033 return 0;
1034 }
1035
1036
1037 static struct platform_driver snd_mts64_driver = {
1038 .probe = snd_mts64_probe,
1039 .remove = __devexit_p(snd_mts64_remove),
1040 .driver = {
1041 .name = PLATFORM_DRIVER
1042 }
1043 };
1044
1045 /*********************************************************************
1046 * module init stuff
1047 *********************************************************************/
1048 static void snd_mts64_unregister_all(void)
1049 {
1050 int i;
1051
1052 for (i = 0; i < SNDRV_CARDS; ++i) {
1053 if (platform_devices[i]) {
1054 platform_device_unregister(platform_devices[i]);
1055 platform_devices[i] = NULL;
1056 }
1057 }
1058 platform_driver_unregister(&snd_mts64_driver);
1059 parport_unregister_driver(&mts64_parport_driver);
1060 }
1061
1062 static int __init snd_mts64_module_init(void)
1063 {
1064 int err;
1065
1066 if ((err = platform_driver_register(&snd_mts64_driver)) < 0)
1067 return err;
1068
1069 if (parport_register_driver(&mts64_parport_driver) != 0) {
1070 platform_driver_unregister(&snd_mts64_driver);
1071 return -EIO;
1072 }
1073
1074 if (device_count == 0) {
1075 snd_mts64_unregister_all();
1076 return -ENODEV;
1077 }
1078
1079 return 0;
1080 }
1081
1082 static void __exit snd_mts64_module_exit(void)
1083 {
1084 snd_mts64_unregister_all();
1085 }
1086
1087 module_init(snd_mts64_module_init);
1088 module_exit(snd_mts64_module_exit);
Support for the Chinese Samsung S3C2440 based development boards