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macvlan: fix a possible use after free
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / sound / drivers / mts64.c
blobf24bf9a06cff385e7a8643817dd214582ad6c0a2
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/module.h>
26 #include <linux/delay.h>
27 #include <linux/slab.h>
28 #include <sound/core.h>
29 #include <sound/initval.h>
30 #include <sound/rawmidi.h>
31 #include <sound/control.h>
32
33 #define CARD_NAME "Miditerminal 4140"
34 #define DRIVER_NAME "MTS64"
35 #define PLATFORM_DRIVER "snd_mts64"
36
37 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
38 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
39 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
40
41 static struct platform_device *platform_devices[SNDRV_CARDS];
42 static int device_count;
43
44 module_param_array(index, int, NULL, S_IRUGO);
45 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
46 module_param_array(id, charp, NULL, S_IRUGO);
47 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
48 module_param_array(enable, bool, NULL, S_IRUGO);
49 MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
50
51 MODULE_AUTHOR("Matthias Koenig <mk@phasorlab.de>");
52 MODULE_DESCRIPTION("ESI Miditerminal 4140");
53 MODULE_LICENSE("GPL");
54 MODULE_SUPPORTED_DEVICE("{{ESI,Miditerminal 4140}}");
55
56 /*********************************************************************
57 * Chip specific
58 *********************************************************************/
59 #define MTS64_NUM_INPUT_PORTS 5
60 #define MTS64_NUM_OUTPUT_PORTS 4
61 #define MTS64_SMPTE_SUBSTREAM 4
62
63 struct mts64 {
64 spinlock_t lock;
65 struct snd_card *card;
66 struct snd_rawmidi *rmidi;
67 struct pardevice *pardev;
68 int pardev_claimed;
69
70 int open_count;
71 int current_midi_output_port;
72 int current_midi_input_port;
73 u8 mode[MTS64_NUM_INPUT_PORTS];
74 struct snd_rawmidi_substream *midi_input_substream[MTS64_NUM_INPUT_PORTS];
75 int smpte_switch;
76 u8 time[4]; /* [0]=hh, [1]=mm, [2]=ss, [3]=ff */
77 u8 fps;
78 };
79
80 static int snd_mts64_free(struct mts64 *mts)
81 {
82 kfree(mts);
83 return 0;
84 }
85
86 static int __devinit snd_mts64_create(struct snd_card *card,
87 struct pardevice *pardev,
88 struct mts64 **rchip)
89 {
90 struct mts64 *mts;
91
92 *rchip = NULL;
93
94 mts = kzalloc(sizeof(struct mts64), GFP_KERNEL);
95 if (mts == NULL)
96 return -ENOMEM;
97
98 /* Init chip specific data */
99 spin_lock_init(&mts->lock);
100 mts->card = card;
101 mts->pardev = pardev;
102 mts->current_midi_output_port = -1;
103 mts->current_midi_input_port = -1;
104
105 *rchip = mts;
106
107 return 0;
108 }
109
110 /*********************************************************************
111 * HW register related constants
112 *********************************************************************/
113
114 /* Status Bits */
115 #define MTS64_STAT_BSY 0x80
116 #define MTS64_STAT_BIT_SET 0x20 /* readout process, bit is set */
117 #define MTS64_STAT_PORT 0x10 /* read byte is a port number */
118
119 /* Control Bits */
120 #define MTS64_CTL_READOUT 0x08 /* enable readout */
121 #define MTS64_CTL_WRITE_CMD 0x06
122 #define MTS64_CTL_WRITE_DATA 0x02
123 #define MTS64_CTL_STROBE 0x01
124
125 /* Command */
126 #define MTS64_CMD_RESET 0xfe
127 #define MTS64_CMD_PROBE 0x8f /* Used in probing procedure */
128 #define MTS64_CMD_SMPTE_SET_TIME 0xe8
129 #define MTS64_CMD_SMPTE_SET_FPS 0xee
130 #define MTS64_CMD_SMPTE_STOP 0xef
131 #define MTS64_CMD_SMPTE_FPS_24 0xe3
132 #define MTS64_CMD_SMPTE_FPS_25 0xe2
133 #define MTS64_CMD_SMPTE_FPS_2997 0xe4
134 #define MTS64_CMD_SMPTE_FPS_30D 0xe1
135 #define MTS64_CMD_SMPTE_FPS_30 0xe0
136 #define MTS64_CMD_COM_OPEN 0xf8 /* setting the communication mode */
137 #define MTS64_CMD_COM_CLOSE1 0xff /* clearing communication mode */
138 #define MTS64_CMD_COM_CLOSE2 0xf5
139
140 /*********************************************************************
141 * Hardware specific functions
142 *********************************************************************/
143 static void mts64_enable_readout(struct parport *p);
144 static void mts64_disable_readout(struct parport *p);
145 static int mts64_device_ready(struct parport *p);
146 static int mts64_device_init(struct parport *p);
147 static int mts64_device_open(struct mts64 *mts);
148 static int mts64_device_close(struct mts64 *mts);
149 static u8 mts64_map_midi_input(u8 c);
150 static int mts64_probe(struct parport *p);
151 static u16 mts64_read(struct parport *p);
152 static u8 mts64_read_char(struct parport *p);
153 static void mts64_smpte_start(struct parport *p,
154 u8 hours, u8 minutes,
155 u8 seconds, u8 frames,
156 u8 idx);
157 static void mts64_smpte_stop(struct parport *p);
158 static void mts64_write_command(struct parport *p, u8 c);
159 static void mts64_write_data(struct parport *p, u8 c);
160 static void mts64_write_midi(struct mts64 *mts, u8 c, int midiport);
161
162
163 /* Enables the readout procedure
164 *
165 * Before we can read a midi byte from the device, we have to set
166 * bit 3 of control port.
167 */
168 static void mts64_enable_readout(struct parport *p)
169 {
170 u8 c;
171
172 c = parport_read_control(p);
173 c |= MTS64_CTL_READOUT;
174 parport_write_control(p, c);
175 }
176
177 /* Disables readout
178 *
179 * Readout is disabled by clearing bit 3 of control
180 */
181 static void mts64_disable_readout(struct parport *p)
182 {
183 u8 c;
184
185 c = parport_read_control(p);
186 c &= ~MTS64_CTL_READOUT;
187 parport_write_control(p, c);
188 }
189
190 /* waits for device ready
191 *
192 * Checks if BUSY (Bit 7 of status) is clear
193 * 1 device ready
194 * 0 failure
195 */
196 static int mts64_device_ready(struct parport *p)
197 {
198 int i;
199 u8 c;
200
201 for (i = 0; i < 0xffff; ++i) {
202 c = parport_read_status(p);
203 c &= MTS64_STAT_BSY;
204 if (c != 0)
205 return 1;
206 }
207
208 return 0;
209 }
210
211 /* Init device (LED blinking startup magic)
212 *
213 * Returns:
214 * 0 init ok
215 * -EIO failure
216 */
217 static int __devinit mts64_device_init(struct parport *p)
218 {
219 int i;
220
221 mts64_write_command(p, MTS64_CMD_RESET);
222
223 for (i = 0; i < 64; ++i) {
224 msleep(100);
225
226 if (mts64_probe(p) == 0) {
227 /* success */
228 mts64_disable_readout(p);
229 return 0;
230 }
231 }
232 mts64_disable_readout(p);
233
234 return -EIO;
235 }
236
237 /*
238 * Opens the device (set communication mode)
239 */
240 static int mts64_device_open(struct mts64 *mts)
241 {
242 int i;
243 struct parport *p = mts->pardev->port;
244
245 for (i = 0; i < 5; ++i)
246 mts64_write_command(p, MTS64_CMD_COM_OPEN);
247
248 return 0;
249 }
250
251 /*
252 * Close device (clear communication mode)
253 */
254 static int mts64_device_close(struct mts64 *mts)
255 {
256 int i;
257 struct parport *p = mts->pardev->port;
258
259 for (i = 0; i < 5; ++i) {
260 mts64_write_command(p, MTS64_CMD_COM_CLOSE1);
261 mts64_write_command(p, MTS64_CMD_COM_CLOSE2);
262 }
263
264 return 0;
265 }
266
267 /* map hardware port to substream number
268 *
269 * When reading a byte from the device, the device tells us
270 * on what port the byte is. This HW port has to be mapped to
271 * the midiport (substream number).
272 * substream 0-3 are Midiports 1-4
273 * substream 4 is SMPTE Timecode
274 * The mapping is done by the table:
275 * HW | 0 | 1 | 2 | 3 | 4
276 * SW | 0 | 1 | 4 | 2 | 3
277 */
278 static u8 mts64_map_midi_input(u8 c)
279 {
280 static u8 map[] = { 0, 1, 4, 2, 3 };
281
282 return map[c];
283 }
284
285
286 /* Probe parport for device
287 *
288 * Do we have a Miditerminal 4140 on parport?
289 * Returns:
290 * 0 device found
291 * -ENODEV no device
292 */
293 static int __devinit mts64_probe(struct parport *p)
294 {
295 u8 c;
296
297 mts64_smpte_stop(p);
298 mts64_write_command(p, MTS64_CMD_PROBE);
299
300 msleep(50);
301
302 c = mts64_read(p);
303
304 c &= 0x00ff;
305 if (c != MTS64_CMD_PROBE)
306 return -ENODEV;
307 else
308 return 0;
309
310 }
311
312 /* Read byte incl. status from device
313 *
314 * Returns:
315 * data in lower 8 bits and status in upper 8 bits
316 */
317 static u16 mts64_read(struct parport *p)
318 {
319 u8 data, status;
320
321 mts64_device_ready(p);
322 mts64_enable_readout(p);
323 status = parport_read_status(p);
324 data = mts64_read_char(p);
325 mts64_disable_readout(p);
326
327 return (status << 8) | data;
328 }
329
330 /* Read a byte from device
331 *
332 * Note, that readout mode has to be enabled.
333 * readout procedure is as follows:
334 * - Write number of the Bit to read to DATA
335 * - Read STATUS
336 * - Bit 5 of STATUS indicates if Bit is set
337 *
338 * Returns:
339 * Byte read from device
340 */
341 static u8 mts64_read_char(struct parport *p)
342 {
343 u8 c = 0;
344 u8 status;
345 u8 i;
346
347 for (i = 0; i < 8; ++i) {
348 parport_write_data(p, i);
349 c >>= 1;
350 status = parport_read_status(p);
351 if (status & MTS64_STAT_BIT_SET)
352 c |= 0x80;
353 }
354
355 return c;
356 }
357
358 /* Starts SMPTE Timecode generation
359 *
360 * The device creates SMPTE Timecode by hardware.
361 * 0 24 fps
362 * 1 25 fps
363 * 2 29.97 fps
364 * 3 30 fps (Drop-frame)
365 * 4 30 fps
366 */
367 static void mts64_smpte_start(struct parport *p,
368 u8 hours, u8 minutes,
369 u8 seconds, u8 frames,
370 u8 idx)
371 {
372 static u8 fps[5] = { MTS64_CMD_SMPTE_FPS_24,
373 MTS64_CMD_SMPTE_FPS_25,
374 MTS64_CMD_SMPTE_FPS_2997,
375 MTS64_CMD_SMPTE_FPS_30D,
376 MTS64_CMD_SMPTE_FPS_30 };
377
378 mts64_write_command(p, MTS64_CMD_SMPTE_SET_TIME);
379 mts64_write_command(p, frames);
380 mts64_write_command(p, seconds);
381 mts64_write_command(p, minutes);
382 mts64_write_command(p, hours);
383
384 mts64_write_command(p, MTS64_CMD_SMPTE_SET_FPS);
385 mts64_write_command(p, fps[idx]);
386 }
387
388 /* Stops SMPTE Timecode generation
389 */
390 static void mts64_smpte_stop(struct parport *p)
391 {
392 mts64_write_command(p, MTS64_CMD_SMPTE_STOP);
393 }
394
395 /* Write a command byte to device
396 */
397 static void mts64_write_command(struct parport *p, u8 c)
398 {
399 mts64_device_ready(p);
400
401 parport_write_data(p, c);
402
403 parport_write_control(p, MTS64_CTL_WRITE_CMD);
404 parport_write_control(p, MTS64_CTL_WRITE_CMD | MTS64_CTL_STROBE);
405 parport_write_control(p, MTS64_CTL_WRITE_CMD);
406 }
407
408 /* Write a data byte to device
409 */
410 static void mts64_write_data(struct parport *p, u8 c)
411 {
412 mts64_device_ready(p);
413
414 parport_write_data(p, c);
415
416 parport_write_control(p, MTS64_CTL_WRITE_DATA);
417 parport_write_control(p, MTS64_CTL_WRITE_DATA | MTS64_CTL_STROBE);
418 parport_write_control(p, MTS64_CTL_WRITE_DATA);
419 }
420
421 /* Write a MIDI byte to midiport
422 *
423 * midiport ranges from 0-3 and maps to Ports 1-4
424 * assumptions: communication mode is on
425 */
426 static void mts64_write_midi(struct mts64 *mts, u8 c,
427 int midiport)
428 {
429 struct parport *p = mts->pardev->port;
430
431 /* check current midiport */
432 if (mts->current_midi_output_port != midiport)
433 mts64_write_command(p, midiport);
434
435 /* write midi byte */
436 mts64_write_data(p, c);
437 }
438
439 /*********************************************************************
440 * Control elements
441 *********************************************************************/
442
443 /* SMPTE Switch */
444 #define snd_mts64_ctl_smpte_switch_info snd_ctl_boolean_mono_info
445
446 static int snd_mts64_ctl_smpte_switch_get(struct snd_kcontrol* kctl,
447 struct snd_ctl_elem_value *uctl)
448 {
449 struct mts64 *mts = snd_kcontrol_chip(kctl);
450
451 spin_lock_irq(&mts->lock);
452 uctl->value.integer.value[0] = mts->smpte_switch;
453 spin_unlock_irq(&mts->lock);
454
455 return 0;
456 }
457
458 /* smpte_switch is not accessed from IRQ handler, so we just need
459 to protect the HW access */
460 static int snd_mts64_ctl_smpte_switch_put(struct snd_kcontrol* kctl,
461 struct snd_ctl_elem_value *uctl)
462 {
463 struct mts64 *mts = snd_kcontrol_chip(kctl);
464 int changed = 0;
465 int val = !!uctl->value.integer.value[0];
466
467 spin_lock_irq(&mts->lock);
468 if (mts->smpte_switch == val)
469 goto __out;
470
471 changed = 1;
472 mts->smpte_switch = val;
473 if (mts->smpte_switch) {
474 mts64_smpte_start(mts->pardev->port,
475 mts->time[0], mts->time[1],
476 mts->time[2], mts->time[3],
477 mts->fps);
478 } else {
479 mts64_smpte_stop(mts->pardev->port);
480 }
481 __out:
482 spin_unlock_irq(&mts->lock);
483 return changed;
484 }
485
486 static struct snd_kcontrol_new mts64_ctl_smpte_switch __devinitdata = {
487 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
488 .name = "SMPTE Playback Switch",
489 .index = 0,
490 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
491 .private_value = 0,
492 .info = snd_mts64_ctl_smpte_switch_info,
493 .get = snd_mts64_ctl_smpte_switch_get,
494 .put = snd_mts64_ctl_smpte_switch_put
495 };
496
497 /* Time */
498 static int snd_mts64_ctl_smpte_time_h_info(struct snd_kcontrol *kctl,
499 struct snd_ctl_elem_info *uinfo)
500 {
501 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
502 uinfo->count = 1;
503 uinfo->value.integer.min = 0;
504 uinfo->value.integer.max = 23;
505 return 0;
506 }
507
508 static int snd_mts64_ctl_smpte_time_f_info(struct snd_kcontrol *kctl,
509 struct snd_ctl_elem_info *uinfo)
510 {
511 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
512 uinfo->count = 1;
513 uinfo->value.integer.min = 0;
514 uinfo->value.integer.max = 99;
515 return 0;
516 }
517
518 static int snd_mts64_ctl_smpte_time_info(struct snd_kcontrol *kctl,
519 struct snd_ctl_elem_info *uinfo)
520 {
521 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
522 uinfo->count = 1;
523 uinfo->value.integer.min = 0;
524 uinfo->value.integer.max = 59;
525 return 0;
526 }
527
528 static int snd_mts64_ctl_smpte_time_get(struct snd_kcontrol *kctl,
529 struct snd_ctl_elem_value *uctl)
530 {
531 struct mts64 *mts = snd_kcontrol_chip(kctl);
532 int idx = kctl->private_value;
533
534 spin_lock_irq(&mts->lock);
535 uctl->value.integer.value[0] = mts->time[idx];
536 spin_unlock_irq(&mts->lock);
537
538 return 0;
539 }
540
541 static int snd_mts64_ctl_smpte_time_put(struct snd_kcontrol *kctl,
542 struct snd_ctl_elem_value *uctl)
543 {
544 struct mts64 *mts = snd_kcontrol_chip(kctl);
545 int idx = kctl->private_value;
546 unsigned int time = uctl->value.integer.value[0] % 60;
547 int changed = 0;
548
549 spin_lock_irq(&mts->lock);
550 if (mts->time[idx] != time) {
551 changed = 1;
552 mts->time[idx] = time;
553 }
554 spin_unlock_irq(&mts->lock);
555
556 return changed;
557 }
558
559 static struct snd_kcontrol_new mts64_ctl_smpte_time_hours __devinitdata = {
560 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
561 .name = "SMPTE Time Hours",
562 .index = 0,
563 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
564 .private_value = 0,
565 .info = snd_mts64_ctl_smpte_time_h_info,
566 .get = snd_mts64_ctl_smpte_time_get,
567 .put = snd_mts64_ctl_smpte_time_put
568 };
569
570 static struct snd_kcontrol_new mts64_ctl_smpte_time_minutes __devinitdata = {
571 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
572 .name = "SMPTE Time Minutes",
573 .index = 0,
574 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
575 .private_value = 1,
576 .info = snd_mts64_ctl_smpte_time_info,
577 .get = snd_mts64_ctl_smpte_time_get,
578 .put = snd_mts64_ctl_smpte_time_put
579 };
580
581 static struct snd_kcontrol_new mts64_ctl_smpte_time_seconds __devinitdata = {
582 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
583 .name = "SMPTE Time Seconds",
584 .index = 0,
585 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
586 .private_value = 2,
587 .info = snd_mts64_ctl_smpte_time_info,
588 .get = snd_mts64_ctl_smpte_time_get,
589 .put = snd_mts64_ctl_smpte_time_put
590 };
591
592 static struct snd_kcontrol_new mts64_ctl_smpte_time_frames __devinitdata = {
593 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
594 .name = "SMPTE Time Frames",
595 .index = 0,
596 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
597 .private_value = 3,
598 .info = snd_mts64_ctl_smpte_time_f_info,
599 .get = snd_mts64_ctl_smpte_time_get,
600 .put = snd_mts64_ctl_smpte_time_put
601 };
602
603 /* FPS */
604 static int snd_mts64_ctl_smpte_fps_info(struct snd_kcontrol *kctl,
605 struct snd_ctl_elem_info *uinfo)
606 {
607 static char *texts[5] = { "24",
608 "25",
609 "29.97",
610 "30D",
611 "30" };
612
613 uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
614 uinfo->count = 1;
615 uinfo->value.enumerated.items = 5;
616 if (uinfo->value.enumerated.item > 4)
617 uinfo->value.enumerated.item = 4;
618 strcpy(uinfo->value.enumerated.name,
619 texts[uinfo->value.enumerated.item]);
620
621 return 0;
622 }
623
624 static int snd_mts64_ctl_smpte_fps_get(struct snd_kcontrol *kctl,
625 struct snd_ctl_elem_value *uctl)
626 {
627 struct mts64 *mts = snd_kcontrol_chip(kctl);
628
629 spin_lock_irq(&mts->lock);
630 uctl->value.enumerated.item[0] = mts->fps;
631 spin_unlock_irq(&mts->lock);
632
633 return 0;
634 }
635
636 static int snd_mts64_ctl_smpte_fps_put(struct snd_kcontrol *kctl,
637 struct snd_ctl_elem_value *uctl)
638 {
639 struct mts64 *mts = snd_kcontrol_chip(kctl);
640 int changed = 0;
641
642 if (uctl->value.enumerated.item[0] >= 5)
643 return -EINVAL;
644 spin_lock_irq(&mts->lock);
645 if (mts->fps != uctl->value.enumerated.item[0]) {
646 changed = 1;
647 mts->fps = uctl->value.enumerated.item[0];
648 }
649 spin_unlock_irq(&mts->lock);
650
651 return changed;
652 }
653
654 static struct snd_kcontrol_new mts64_ctl_smpte_fps __devinitdata = {
655 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
656 .name = "SMPTE Fps",
657 .index = 0,
658 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
659 .private_value = 0,
660 .info = snd_mts64_ctl_smpte_fps_info,
661 .get = snd_mts64_ctl_smpte_fps_get,
662 .put = snd_mts64_ctl_smpte_fps_put
663 };
664
665
666 static int __devinit snd_mts64_ctl_create(struct snd_card *card,
667 struct mts64 *mts)
668 {
669 int err, i;
670 static struct snd_kcontrol_new *control[] __devinitdata = {
671 &mts64_ctl_smpte_switch,
672 &mts64_ctl_smpte_time_hours,
673 &mts64_ctl_smpte_time_minutes,
674 &mts64_ctl_smpte_time_seconds,
675 &mts64_ctl_smpte_time_frames,
676 &mts64_ctl_smpte_fps,
677 NULL };
678
679 for (i = 0; control[i]; ++i) {
680 err = snd_ctl_add(card, snd_ctl_new1(control[i], mts));
681 if (err < 0) {
682 snd_printd("Cannot create control: %s\n",
683 control[i]->name);
684 return err;
685 }
686 }
687
688 return 0;
689 }
690
691 /*********************************************************************
692 * Rawmidi
693 *********************************************************************/
694 #define MTS64_MODE_INPUT_TRIGGERED 0x01
695
696 static int snd_mts64_rawmidi_open(struct snd_rawmidi_substream *substream)
697 {
698 struct mts64 *mts = substream->rmidi->private_data;
699
700 if (mts->open_count == 0) {
701 /* We don't need a spinlock here, because this is just called
702 if the device has not been opened before.
703 So there aren't any IRQs from the device */
704 mts64_device_open(mts);
705
706 msleep(50);
707 }
708 ++(mts->open_count);
709
710 return 0;
711 }
712
713 static int snd_mts64_rawmidi_close(struct snd_rawmidi_substream *substream)
714 {
715 struct mts64 *mts = substream->rmidi->private_data;
716 unsigned long flags;
717
718 --(mts->open_count);
719 if (mts->open_count == 0) {
720 /* We need the spinlock_irqsave here because we can still
721 have IRQs at this point */
722 spin_lock_irqsave(&mts->lock, flags);
723 mts64_device_close(mts);
724 spin_unlock_irqrestore(&mts->lock, flags);
725
726 msleep(500);
727
728 } else if (mts->open_count < 0)
729 mts->open_count = 0;
730
731 return 0;
732 }
733
734 static void snd_mts64_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,
735 int up)
736 {
737 struct mts64 *mts = substream->rmidi->private_data;
738 u8 data;
739 unsigned long flags;
740
741 spin_lock_irqsave(&mts->lock, flags);
742 while (snd_rawmidi_transmit_peek(substream, &data, 1) == 1) {
743 mts64_write_midi(mts, data, substream->number+1);
744 snd_rawmidi_transmit_ack(substream, 1);
745 }
746 spin_unlock_irqrestore(&mts->lock, flags);
747 }
748
749 static void snd_mts64_rawmidi_input_trigger(struct snd_rawmidi_substream *substream,
750 int up)
751 {
752 struct mts64 *mts = substream->rmidi->private_data;
753 unsigned long flags;
754
755 spin_lock_irqsave(&mts->lock, flags);
756 if (up)
757 mts->mode[substream->number] |= MTS64_MODE_INPUT_TRIGGERED;
758 else
759 mts->mode[substream->number] &= ~MTS64_MODE_INPUT_TRIGGERED;
760
761 spin_unlock_irqrestore(&mts->lock, flags);
762 }
763
764 static struct snd_rawmidi_ops snd_mts64_rawmidi_output_ops = {
765 .open = snd_mts64_rawmidi_open,
766 .close = snd_mts64_rawmidi_close,
767 .trigger = snd_mts64_rawmidi_output_trigger
768 };
769
770 static struct snd_rawmidi_ops snd_mts64_rawmidi_input_ops = {
771 .open = snd_mts64_rawmidi_open,
772 .close = snd_mts64_rawmidi_close,
773 .trigger = snd_mts64_rawmidi_input_trigger
774 };
775
776 /* Create and initialize the rawmidi component */
777 static int __devinit snd_mts64_rawmidi_create(struct snd_card *card)
778 {
779 struct mts64 *mts = card->private_data;
780 struct snd_rawmidi *rmidi;
781 struct snd_rawmidi_substream *substream;
782 struct list_head *list;
783 int err;
784
785 err = snd_rawmidi_new(card, CARD_NAME, 0,
786 MTS64_NUM_OUTPUT_PORTS,
787 MTS64_NUM_INPUT_PORTS,
788 &rmidi);
789 if (err < 0)
790 return err;
791
792 rmidi->private_data = mts;
793 strcpy(rmidi->name, CARD_NAME);
794 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
795 SNDRV_RAWMIDI_INFO_INPUT |
796 SNDRV_RAWMIDI_INFO_DUPLEX;
797
798 mts->rmidi = rmidi;
799
800 /* register rawmidi ops */
801 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
802 &snd_mts64_rawmidi_output_ops);
803 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
804 &snd_mts64_rawmidi_input_ops);
805
806 /* name substreams */
807 /* output */
808 list_for_each(list,
809 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
810 substream = list_entry(list, struct snd_rawmidi_substream, list);
811 sprintf(substream->name,
812 "Miditerminal %d", substream->number+1);
813 }
814 /* input */
815 list_for_each(list,
816 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
817 substream = list_entry(list, struct snd_rawmidi_substream, list);
818 mts->midi_input_substream[substream->number] = substream;
819 switch(substream->number) {
820 case MTS64_SMPTE_SUBSTREAM:
821 strcpy(substream->name, "Miditerminal SMPTE");
822 break;
823 default:
824 sprintf(substream->name,
825 "Miditerminal %d", substream->number+1);
826 }
827 }
828
829 /* controls */
830 err = snd_mts64_ctl_create(card, mts);
831
832 return err;
833 }
834
835 /*********************************************************************
836 * parport stuff
837 *********************************************************************/
838 static void snd_mts64_interrupt(void *private)
839 {
840 struct mts64 *mts = ((struct snd_card*)private)->private_data;
841 u16 ret;
842 u8 status, data;
843 struct snd_rawmidi_substream *substream;
844
845 spin_lock(&mts->lock);
846 ret = mts64_read(mts->pardev->port);
847 data = ret & 0x00ff;
848 status = ret >> 8;
849
850 if (status & MTS64_STAT_PORT) {
851 mts->current_midi_input_port = mts64_map_midi_input(data);
852 } else {
853 if (mts->current_midi_input_port == -1)
854 goto __out;
855 substream = mts->midi_input_substream[mts->current_midi_input_port];
856 if (mts->mode[substream->number] & MTS64_MODE_INPUT_TRIGGERED)
857 snd_rawmidi_receive(substream, &data, 1);
858 }
859 __out:
860 spin_unlock(&mts->lock);
861 }
862
863 static int __devinit snd_mts64_probe_port(struct parport *p)
864 {
865 struct pardevice *pardev;
866 int res;
867
868 pardev = parport_register_device(p, DRIVER_NAME,
869 NULL, NULL, NULL,
870 0, NULL);
871 if (!pardev)
872 return -EIO;
873
874 if (parport_claim(pardev)) {
875 parport_unregister_device(pardev);
876 return -EIO;
877 }
878
879 res = mts64_probe(p);
880
881 parport_release(pardev);
882 parport_unregister_device(pardev);
883
884 return res;
885 }
886
887 static void __devinit snd_mts64_attach(struct parport *p)
888 {
889 struct platform_device *device;
890
891 device = platform_device_alloc(PLATFORM_DRIVER, device_count);
892 if (!device)
893 return;
894
895 /* Temporary assignment to forward the parport */
896 platform_set_drvdata(device, p);
897
898 if (platform_device_add(device) < 0) {
899 platform_device_put(device);
900 return;
901 }
902
903 /* Since we dont get the return value of probe
904 * We need to check if device probing succeeded or not */
905 if (!platform_get_drvdata(device)) {
906 platform_device_unregister(device);
907 return;
908 }
909
910 /* register device in global table */
911 platform_devices[device_count] = device;
912 device_count++;
913 }
914
915 static void snd_mts64_detach(struct parport *p)
916 {
917 /* nothing to do here */
918 }
919
920 static struct parport_driver mts64_parport_driver = {
921 .name = "mts64",
922 .attach = snd_mts64_attach,
923 .detach = snd_mts64_detach
924 };
925
926 /*********************************************************************
927 * platform stuff
928 *********************************************************************/
929 static void snd_mts64_card_private_free(struct snd_card *card)
930 {
931 struct mts64 *mts = card->private_data;
932 struct pardevice *pardev = mts->pardev;
933
934 if (pardev) {
935 if (mts->pardev_claimed)
936 parport_release(pardev);
937 parport_unregister_device(pardev);
938 }
939
940 snd_mts64_free(mts);
941 }
942
943 static int __devinit snd_mts64_probe(struct platform_device *pdev)
944 {
945 struct pardevice *pardev;
946 struct parport *p;
947 int dev = pdev->id;
948 struct snd_card *card = NULL;
949 struct mts64 *mts = NULL;
950 int err;
951
952 p = platform_get_drvdata(pdev);
953 platform_set_drvdata(pdev, NULL);
954
955 if (dev >= SNDRV_CARDS)
956 return -ENODEV;
957 if (!enable[dev])
958 return -ENOENT;
959 if ((err = snd_mts64_probe_port(p)) < 0)
960 return err;
961
962 err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
963 if (err < 0) {
964 snd_printd("Cannot create card\n");
965 return err;
966 }
967 strcpy(card->driver, DRIVER_NAME);
968 strcpy(card->shortname, "ESI " CARD_NAME);
969 sprintf(card->longname, "%s at 0x%lx, irq %i",
970 card->shortname, p->base, p->irq);
971
972 pardev = parport_register_device(p, /* port */
973 DRIVER_NAME, /* name */
974 NULL, /* preempt */
975 NULL, /* wakeup */
976 snd_mts64_interrupt, /* ISR */
977 PARPORT_DEV_EXCL, /* flags */
978 (void *)card); /* private */
979 if (pardev == NULL) {
980 snd_printd("Cannot register pardevice\n");
981 err = -EIO;
982 goto __err;
983 }
984
985 if ((err = snd_mts64_create(card, pardev, &mts)) < 0) {
986 snd_printd("Cannot create main component\n");
987 parport_unregister_device(pardev);
988 goto __err;
989 }
990 card->private_data = mts;
991 card->private_free = snd_mts64_card_private_free;
992
993 if ((err = snd_mts64_rawmidi_create(card)) < 0) {
994 snd_printd("Creating Rawmidi component failed\n");
995 goto __err;
996 }
997
998 /* claim parport */
999 if (parport_claim(pardev)) {
1000 snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base);
1001 err = -EIO;
1002 goto __err;
1003 }
1004 mts->pardev_claimed = 1;
1005
1006 /* init device */
1007 if ((err = mts64_device_init(p)) < 0)
1008 goto __err;
1009
1010 platform_set_drvdata(pdev, card);
1011
1012 snd_card_set_dev(card, &pdev->dev);
1013
1014 /* At this point card will be usable */
1015 if ((err = snd_card_register(card)) < 0) {
1016 snd_printd("Cannot register card\n");
1017 goto __err;
1018 }
1019
1020 snd_printk(KERN_INFO "ESI Miditerminal 4140 on 0x%lx\n", p->base);
1021 return 0;
1022
1023 __err:
1024 snd_card_free(card);
1025 return err;
1026 }
1027
1028 static int __devexit snd_mts64_remove(struct platform_device *pdev)
1029 {
1030 struct snd_card *card = platform_get_drvdata(pdev);
1031
1032 if (card)
1033 snd_card_free(card);
1034
1035 return 0;
1036 }
1037
1038
1039 static struct platform_driver snd_mts64_driver = {
1040 .probe = snd_mts64_probe,
1041 .remove = __devexit_p(snd_mts64_remove),
1042 .driver = {
1043 .name = PLATFORM_DRIVER
1044 }
1045 };
1046
1047 /*********************************************************************
1048 * module init stuff
1049 *********************************************************************/
1050 static void snd_mts64_unregister_all(void)
1051 {
1052 int i;
1053
1054 for (i = 0; i < SNDRV_CARDS; ++i) {
1055 if (platform_devices[i]) {
1056 platform_device_unregister(platform_devices[i]);
1057 platform_devices[i] = NULL;
1058 }
1059 }
1060 platform_driver_unregister(&snd_mts64_driver);
1061 parport_unregister_driver(&mts64_parport_driver);
1062 }
1063
1064 static int __init snd_mts64_module_init(void)
1065 {
1066 int err;
1067
1068 if ((err = platform_driver_register(&snd_mts64_driver)) < 0)
1069 return err;
1070
1071 if (parport_register_driver(&mts64_parport_driver) != 0) {
1072 platform_driver_unregister(&snd_mts64_driver);
1073 return -EIO;
1074 }
1075
1076 if (device_count == 0) {
1077 snd_mts64_unregister_all();
1078 return -ENODEV;
1079 }
1080
1081 return 0;
1082 }
1083
1084 static void __exit snd_mts64_module_exit(void)
1085 {
1086 snd_mts64_unregister_all();
1087 }
1088
1089 module_init(snd_mts64_module_init);
1090 module_exit(snd_mts64_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree