1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * ALSA Driver for Ego Systems Inc. (ESI) Miditerminal 4140
4 * Copyright (c) 2006 by Matthias König <mk@phasorlab.de>
5 */
6
7 #include <linux/init.h>
8 #include <linux/platform_device.h>
9 #include <linux/parport.h>
10 #include <linux/spinlock.h>
11 #include <linux/module.h>
12 #include <linux/delay.h>
13 #include <linux/slab.h>
14 #include <sound/core.h>
15 #include <sound/initval.h>
16 #include <sound/rawmidi.h>
17 #include <sound/control.h>
18
19 #define CARD_NAME "Miditerminal 4140"
20 #define DRIVER_NAME "MTS64"
21 #define PLATFORM_DRIVER "snd_mts64"
22
23 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
24 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
25 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
26
27 static struct platform_device *platform_devices[SNDRV_CARDS];
28 static int device_count;
29
30 module_param_array(index, int, NULL, 0444);
31 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
32 module_param_array(id, charp, NULL, 0444);
33 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
34 module_param_array(enable, bool, NULL, 0444);
35 MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
36
37 MODULE_AUTHOR("Matthias Koenig <mk@phasorlab.de>");
38 MODULE_DESCRIPTION("ESI Miditerminal 4140");
39 MODULE_LICENSE("GPL");
40
41 /*********************************************************************
42 * Chip specific
43 *********************************************************************/
44 #define MTS64_NUM_INPUT_PORTS 5
45 #define MTS64_NUM_OUTPUT_PORTS 4
46 #define MTS64_SMPTE_SUBSTREAM 4
47
48 struct mts64 {
49 spinlock_t lock;
50 struct snd_card *card;
51 struct snd_rawmidi *rmidi;
52 struct pardevice *pardev;
53 int open_count;
54 int current_midi_output_port;
55 int current_midi_input_port;
56 u8 mode[MTS64_NUM_INPUT_PORTS];
57 struct snd_rawmidi_substream *midi_input_substream[MTS64_NUM_INPUT_PORTS];
58 int smpte_switch;
59 u8 time[4]; /* [0]=hh, [1]=mm, [2]=ss, [3]=ff */
60 u8 fps;
61 };
62
snd_mts64_free(struct mts64 * mts)63 static int snd_mts64_free(struct mts64 *mts)
64 {
65 kfree(mts);
66 return 0;
67 }
68
snd_mts64_create(struct snd_card * card,struct pardevice * pardev,struct mts64 ** rchip)69 static int snd_mts64_create(struct snd_card *card,
70 struct pardevice *pardev,
71 struct mts64 **rchip)
72 {
73 struct mts64 *mts;
74
75 *rchip = NULL;
76
77 mts = kzalloc(sizeof(struct mts64), GFP_KERNEL);
78 if (mts == NULL)
79 return -ENOMEM;
80
81 /* Init chip specific data */
82 spin_lock_init(&mts->lock);
83 mts->card = card;
84 mts->pardev = pardev;
85 mts->current_midi_output_port = -1;
86 mts->current_midi_input_port = -1;
87
88 *rchip = mts;
89
90 return 0;
91 }
92
93 /*********************************************************************
94 * HW register related constants
95 *********************************************************************/
96
97 /* Status Bits */
98 #define MTS64_STAT_BSY 0x80
99 #define MTS64_STAT_BIT_SET 0x20 /* readout process, bit is set */
100 #define MTS64_STAT_PORT 0x10 /* read byte is a port number */
101
102 /* Control Bits */
103 #define MTS64_CTL_READOUT 0x08 /* enable readout */
104 #define MTS64_CTL_WRITE_CMD 0x06
105 #define MTS64_CTL_WRITE_DATA 0x02
106 #define MTS64_CTL_STROBE 0x01
107
108 /* Command */
109 #define MTS64_CMD_RESET 0xfe
110 #define MTS64_CMD_PROBE 0x8f /* Used in probing procedure */
111 #define MTS64_CMD_SMPTE_SET_TIME 0xe8
112 #define MTS64_CMD_SMPTE_SET_FPS 0xee
113 #define MTS64_CMD_SMPTE_STOP 0xef
114 #define MTS64_CMD_SMPTE_FPS_24 0xe3
115 #define MTS64_CMD_SMPTE_FPS_25 0xe2
116 #define MTS64_CMD_SMPTE_FPS_2997 0xe4
117 #define MTS64_CMD_SMPTE_FPS_30D 0xe1
118 #define MTS64_CMD_SMPTE_FPS_30 0xe0
119 #define MTS64_CMD_COM_OPEN 0xf8 /* setting the communication mode */
120 #define MTS64_CMD_COM_CLOSE1 0xff /* clearing communication mode */
121 #define MTS64_CMD_COM_CLOSE2 0xf5
122
123 /*********************************************************************
124 * Hardware specific functions
125 *********************************************************************/
126 static void mts64_enable_readout(struct parport *p);
127 static void mts64_disable_readout(struct parport *p);
128 static int mts64_device_ready(struct parport *p);
129 static int mts64_device_init(struct parport *p);
130 static int mts64_device_open(struct mts64 *mts);
131 static int mts64_device_close(struct mts64 *mts);
132 static u8 mts64_map_midi_input(u8 c);
133 static int mts64_probe(struct parport *p);
134 static u16 mts64_read(struct parport *p);
135 static u8 mts64_read_char(struct parport *p);
136 static void mts64_smpte_start(struct parport *p,
137 u8 hours, u8 minutes,
138 u8 seconds, u8 frames,
139 u8 idx);
140 static void mts64_smpte_stop(struct parport *p);
141 static void mts64_write_command(struct parport *p, u8 c);
142 static void mts64_write_data(struct parport *p, u8 c);
143 static void mts64_write_midi(struct mts64 *mts, u8 c, int midiport);
144
145
146 /* Enables the readout procedure
147 *
148 * Before we can read a midi byte from the device, we have to set
149 * bit 3 of control port.
150 */
mts64_enable_readout(struct parport * p)151 static void mts64_enable_readout(struct parport *p)
152 {
153 u8 c;
154
155 c = parport_read_control(p);
156 c |= MTS64_CTL_READOUT;
157 parport_write_control(p, c);
158 }
159
160 /* Disables readout
161 *
162 * Readout is disabled by clearing bit 3 of control
163 */
mts64_disable_readout(struct parport * p)164 static void mts64_disable_readout(struct parport *p)
165 {
166 u8 c;
167
168 c = parport_read_control(p);
169 c &= ~MTS64_CTL_READOUT;
170 parport_write_control(p, c);
171 }
172
173 /* waits for device ready
174 *
175 * Checks if BUSY (Bit 7 of status) is clear
176 * 1 device ready
177 * 0 failure
178 */
mts64_device_ready(struct parport * p)179 static int mts64_device_ready(struct parport *p)
180 {
181 int i;
182 u8 c;
183
184 for (i = 0; i < 0xffff; ++i) {
185 c = parport_read_status(p);
186 c &= MTS64_STAT_BSY;
187 if (c != 0)
188 return 1;
189 }
190
191 return 0;
192 }
193
194 /* Init device (LED blinking startup magic)
195 *
196 * Returns:
197 * 0 init ok
198 * -EIO failure
199 */
mts64_device_init(struct parport * p)200 static int mts64_device_init(struct parport *p)
201 {
202 int i;
203
204 mts64_write_command(p, MTS64_CMD_RESET);
205
206 for (i = 0; i < 64; ++i) {
207 msleep(100);
208
209 if (mts64_probe(p) == 0) {
210 /* success */
211 mts64_disable_readout(p);
212 return 0;
213 }
214 }
215 mts64_disable_readout(p);
216
217 return -EIO;
218 }
219
220 /*
221 * Opens the device (set communication mode)
222 */
mts64_device_open(struct mts64 * mts)223 static int mts64_device_open(struct mts64 *mts)
224 {
225 int i;
226 struct parport *p = mts->pardev->port;
227
228 for (i = 0; i < 5; ++i)
229 mts64_write_command(p, MTS64_CMD_COM_OPEN);
230
231 return 0;
232 }
233
234 /*
235 * Close device (clear communication mode)
236 */
mts64_device_close(struct mts64 * mts)237 static int mts64_device_close(struct mts64 *mts)
238 {
239 int i;
240 struct parport *p = mts->pardev->port;
241
242 for (i = 0; i < 5; ++i) {
243 mts64_write_command(p, MTS64_CMD_COM_CLOSE1);
244 mts64_write_command(p, MTS64_CMD_COM_CLOSE2);
245 }
246
247 return 0;
248 }
249
250 /* map hardware port to substream number
251 *
252 * When reading a byte from the device, the device tells us
253 * on what port the byte is. This HW port has to be mapped to
254 * the midiport (substream number).
255 * substream 0-3 are Midiports 1-4
256 * substream 4 is SMPTE Timecode
257 * The mapping is done by the table:
258 * HW | 0 | 1 | 2 | 3 | 4
259 * SW | 0 | 1 | 4 | 2 | 3
260 */
mts64_map_midi_input(u8 c)261 static u8 mts64_map_midi_input(u8 c)
262 {
263 static const u8 map[] = { 0, 1, 4, 2, 3 };
264
265 return map[c];
266 }
267
268
269 /* Probe parport for device
270 *
271 * Do we have a Miditerminal 4140 on parport?
272 * Returns:
273 * 0 device found
274 * -ENODEV no device
275 */
mts64_probe(struct parport * p)276 static int mts64_probe(struct parport *p)
277 {
278 u8 c;
279
280 mts64_smpte_stop(p);
281 mts64_write_command(p, MTS64_CMD_PROBE);
282
283 msleep(50);
284
285 c = mts64_read(p);
286
287 c &= 0x00ff;
288 if (c != MTS64_CMD_PROBE)
289 return -ENODEV;
290 else
291 return 0;
292
293 }
294
295 /* Read byte incl. status from device
296 *
297 * Returns:
298 * data in lower 8 bits and status in upper 8 bits
299 */
mts64_read(struct parport * p)300 static u16 mts64_read(struct parport *p)
301 {
302 u8 data, status;
303
304 mts64_device_ready(p);
305 mts64_enable_readout(p);
306 status = parport_read_status(p);
307 data = mts64_read_char(p);
308 mts64_disable_readout(p);
309
310 return (status << 8) | data;
311 }
312
313 /* Read a byte from device
314 *
315 * Note, that readout mode has to be enabled.
316 * readout procedure is as follows:
317 * - Write number of the Bit to read to DATA
318 * - Read STATUS
319 * - Bit 5 of STATUS indicates if Bit is set
320 *
321 * Returns:
322 * Byte read from device
323 */
mts64_read_char(struct parport * p)324 static u8 mts64_read_char(struct parport *p)
325 {
326 u8 c = 0;
327 u8 status;
328 u8 i;
329
330 for (i = 0; i < 8; ++i) {
331 parport_write_data(p, i);
332 c >>= 1;
333 status = parport_read_status(p);
334 if (status & MTS64_STAT_BIT_SET)
335 c |= 0x80;
336 }
337
338 return c;
339 }
340
341 /* Starts SMPTE Timecode generation
342 *
343 * The device creates SMPTE Timecode by hardware.
344 * 0 24 fps
345 * 1 25 fps
346 * 2 29.97 fps
347 * 3 30 fps (Drop-frame)
348 * 4 30 fps
349 */
mts64_smpte_start(struct parport * p,u8 hours,u8 minutes,u8 seconds,u8 frames,u8 idx)350 static void mts64_smpte_start(struct parport *p,
351 u8 hours, u8 minutes,
352 u8 seconds, u8 frames,
353 u8 idx)
354 {
355 static const u8 fps[5] = { MTS64_CMD_SMPTE_FPS_24,
356 MTS64_CMD_SMPTE_FPS_25,
357 MTS64_CMD_SMPTE_FPS_2997,
358 MTS64_CMD_SMPTE_FPS_30D,
359 MTS64_CMD_SMPTE_FPS_30 };
360
361 mts64_write_command(p, MTS64_CMD_SMPTE_SET_TIME);
362 mts64_write_command(p, frames);
363 mts64_write_command(p, seconds);
364 mts64_write_command(p, minutes);
365 mts64_write_command(p, hours);
366
367 mts64_write_command(p, MTS64_CMD_SMPTE_SET_FPS);
368 mts64_write_command(p, fps[idx]);
369 }
370
371 /* Stops SMPTE Timecode generation
372 */
mts64_smpte_stop(struct parport * p)373 static void mts64_smpte_stop(struct parport *p)
374 {
375 mts64_write_command(p, MTS64_CMD_SMPTE_STOP);
376 }
377
378 /* Write a command byte to device
379 */
mts64_write_command(struct parport * p,u8 c)380 static void mts64_write_command(struct parport *p, u8 c)
381 {
382 mts64_device_ready(p);
383
384 parport_write_data(p, c);
385
386 parport_write_control(p, MTS64_CTL_WRITE_CMD);
387 parport_write_control(p, MTS64_CTL_WRITE_CMD | MTS64_CTL_STROBE);
388 parport_write_control(p, MTS64_CTL_WRITE_CMD);
389 }
390
391 /* Write a data byte to device
392 */
mts64_write_data(struct parport * p,u8 c)393 static void mts64_write_data(struct parport *p, u8 c)
394 {
395 mts64_device_ready(p);
396
397 parport_write_data(p, c);
398
399 parport_write_control(p, MTS64_CTL_WRITE_DATA);
400 parport_write_control(p, MTS64_CTL_WRITE_DATA | MTS64_CTL_STROBE);
401 parport_write_control(p, MTS64_CTL_WRITE_DATA);
402 }
403
404 /* Write a MIDI byte to midiport
405 *
406 * midiport ranges from 0-3 and maps to Ports 1-4
407 * assumptions: communication mode is on
408 */
mts64_write_midi(struct mts64 * mts,u8 c,int midiport)409 static void mts64_write_midi(struct mts64 *mts, u8 c,
410 int midiport)
411 {
412 struct parport *p = mts->pardev->port;
413
414 /* check current midiport */
415 if (mts->current_midi_output_port != midiport)
416 mts64_write_command(p, midiport);
417
418 /* write midi byte */
419 mts64_write_data(p, c);
420 }
421
422 /*********************************************************************
423 * Control elements
424 *********************************************************************/
425
426 /* SMPTE Switch */
427 #define snd_mts64_ctl_smpte_switch_info snd_ctl_boolean_mono_info
428
snd_mts64_ctl_smpte_switch_get(struct snd_kcontrol * kctl,struct snd_ctl_elem_value * uctl)429 static int snd_mts64_ctl_smpte_switch_get(struct snd_kcontrol* kctl,
430 struct snd_ctl_elem_value *uctl)
431 {
432 struct mts64 *mts = snd_kcontrol_chip(kctl);
433
434 spin_lock_irq(&mts->lock);
435 uctl->value.integer.value[0] = mts->smpte_switch;
436 spin_unlock_irq(&mts->lock);
437
438 return 0;
439 }
440
441 /* smpte_switch is not accessed from IRQ handler, so we just need
442 to protect the HW access */
snd_mts64_ctl_smpte_switch_put(struct snd_kcontrol * kctl,struct snd_ctl_elem_value * uctl)443 static int snd_mts64_ctl_smpte_switch_put(struct snd_kcontrol* kctl,
444 struct snd_ctl_elem_value *uctl)
445 {
446 struct mts64 *mts = snd_kcontrol_chip(kctl);
447 int changed = 0;
448 int val = !!uctl->value.integer.value[0];
449
450 spin_lock_irq(&mts->lock);
451 if (mts->smpte_switch == val)
452 goto __out;
453
454 changed = 1;
455 mts->smpte_switch = val;
456 if (mts->smpte_switch) {
457 mts64_smpte_start(mts->pardev->port,
458 mts->time[0], mts->time[1],
459 mts->time[2], mts->time[3],
460 mts->fps);
461 } else {
462 mts64_smpte_stop(mts->pardev->port);
463 }
464 __out:
465 spin_unlock_irq(&mts->lock);
466 return changed;
467 }
468
469 static const struct snd_kcontrol_new mts64_ctl_smpte_switch = {
470 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
471 .name = "SMPTE Playback Switch",
472 .index = 0,
473 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
474 .private_value = 0,
475 .info = snd_mts64_ctl_smpte_switch_info,
476 .get = snd_mts64_ctl_smpte_switch_get,
477 .put = snd_mts64_ctl_smpte_switch_put
478 };
479
480 /* Time */
snd_mts64_ctl_smpte_time_h_info(struct snd_kcontrol * kctl,struct snd_ctl_elem_info * uinfo)481 static int snd_mts64_ctl_smpte_time_h_info(struct snd_kcontrol *kctl,
482 struct snd_ctl_elem_info *uinfo)
483 {
484 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
485 uinfo->count = 1;
486 uinfo->value.integer.min = 0;
487 uinfo->value.integer.max = 23;
488 return 0;
489 }
490
snd_mts64_ctl_smpte_time_f_info(struct snd_kcontrol * kctl,struct snd_ctl_elem_info * uinfo)491 static int snd_mts64_ctl_smpte_time_f_info(struct snd_kcontrol *kctl,
492 struct snd_ctl_elem_info *uinfo)
493 {
494 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
495 uinfo->count = 1;
496 uinfo->value.integer.min = 0;
497 uinfo->value.integer.max = 99;
498 return 0;
499 }
500
snd_mts64_ctl_smpte_time_info(struct snd_kcontrol * kctl,struct snd_ctl_elem_info * uinfo)501 static int snd_mts64_ctl_smpte_time_info(struct snd_kcontrol *kctl,
502 struct snd_ctl_elem_info *uinfo)
503 {
504 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
505 uinfo->count = 1;
506 uinfo->value.integer.min = 0;
507 uinfo->value.integer.max = 59;
508 return 0;
509 }
510
snd_mts64_ctl_smpte_time_get(struct snd_kcontrol * kctl,struct snd_ctl_elem_value * uctl)511 static int snd_mts64_ctl_smpte_time_get(struct snd_kcontrol *kctl,
512 struct snd_ctl_elem_value *uctl)
513 {
514 struct mts64 *mts = snd_kcontrol_chip(kctl);
515 int idx = kctl->private_value;
516
517 spin_lock_irq(&mts->lock);
518 uctl->value.integer.value[0] = mts->time[idx];
519 spin_unlock_irq(&mts->lock);
520
521 return 0;
522 }
523
snd_mts64_ctl_smpte_time_put(struct snd_kcontrol * kctl,struct snd_ctl_elem_value * uctl)524 static int snd_mts64_ctl_smpte_time_put(struct snd_kcontrol *kctl,
525 struct snd_ctl_elem_value *uctl)
526 {
527 struct mts64 *mts = snd_kcontrol_chip(kctl);
528 int idx = kctl->private_value;
529 unsigned int time = uctl->value.integer.value[0] % 60;
530 int changed = 0;
531
532 spin_lock_irq(&mts->lock);
533 if (mts->time[idx] != time) {
534 changed = 1;
535 mts->time[idx] = time;
536 }
537 spin_unlock_irq(&mts->lock);
538
539 return changed;
540 }
541
542 static const struct snd_kcontrol_new mts64_ctl_smpte_time_hours = {
543 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
544 .name = "SMPTE Time Hours",
545 .index = 0,
546 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
547 .private_value = 0,
548 .info = snd_mts64_ctl_smpte_time_h_info,
549 .get = snd_mts64_ctl_smpte_time_get,
550 .put = snd_mts64_ctl_smpte_time_put
551 };
552
553 static const struct snd_kcontrol_new mts64_ctl_smpte_time_minutes = {
554 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
555 .name = "SMPTE Time Minutes",
556 .index = 0,
557 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
558 .private_value = 1,
559 .info = snd_mts64_ctl_smpte_time_info,
560 .get = snd_mts64_ctl_smpte_time_get,
561 .put = snd_mts64_ctl_smpte_time_put
562 };
563
564 static const struct snd_kcontrol_new mts64_ctl_smpte_time_seconds = {
565 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
566 .name = "SMPTE Time Seconds",
567 .index = 0,
568 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
569 .private_value = 2,
570 .info = snd_mts64_ctl_smpte_time_info,
571 .get = snd_mts64_ctl_smpte_time_get,
572 .put = snd_mts64_ctl_smpte_time_put
573 };
574
575 static const struct snd_kcontrol_new mts64_ctl_smpte_time_frames = {
576 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
577 .name = "SMPTE Time Frames",
578 .index = 0,
579 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
580 .private_value = 3,
581 .info = snd_mts64_ctl_smpte_time_f_info,
582 .get = snd_mts64_ctl_smpte_time_get,
583 .put = snd_mts64_ctl_smpte_time_put
584 };
585
586 /* FPS */
snd_mts64_ctl_smpte_fps_info(struct snd_kcontrol * kctl,struct snd_ctl_elem_info * uinfo)587 static int snd_mts64_ctl_smpte_fps_info(struct snd_kcontrol *kctl,
588 struct snd_ctl_elem_info *uinfo)
589 {
590 static const char * const texts[5] = {
591 "24", "25", "29.97", "30D", "30"
592 };
593
594 return snd_ctl_enum_info(uinfo, 1, 5, texts);
595 }
596
snd_mts64_ctl_smpte_fps_get(struct snd_kcontrol * kctl,struct snd_ctl_elem_value * uctl)597 static int snd_mts64_ctl_smpte_fps_get(struct snd_kcontrol *kctl,
598 struct snd_ctl_elem_value *uctl)
599 {
600 struct mts64 *mts = snd_kcontrol_chip(kctl);
601
602 spin_lock_irq(&mts->lock);
603 uctl->value.enumerated.item[0] = mts->fps;
604 spin_unlock_irq(&mts->lock);
605
606 return 0;
607 }
608
snd_mts64_ctl_smpte_fps_put(struct snd_kcontrol * kctl,struct snd_ctl_elem_value * uctl)609 static int snd_mts64_ctl_smpte_fps_put(struct snd_kcontrol *kctl,
610 struct snd_ctl_elem_value *uctl)
611 {
612 struct mts64 *mts = snd_kcontrol_chip(kctl);
613 int changed = 0;
614
615 if (uctl->value.enumerated.item[0] >= 5)
616 return -EINVAL;
617 spin_lock_irq(&mts->lock);
618 if (mts->fps != uctl->value.enumerated.item[0]) {
619 changed = 1;
620 mts->fps = uctl->value.enumerated.item[0];
621 }
622 spin_unlock_irq(&mts->lock);
623
624 return changed;
625 }
626
627 static const struct snd_kcontrol_new mts64_ctl_smpte_fps = {
628 .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
629 .name = "SMPTE Fps",
630 .index = 0,
631 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
632 .private_value = 0,
633 .info = snd_mts64_ctl_smpte_fps_info,
634 .get = snd_mts64_ctl_smpte_fps_get,
635 .put = snd_mts64_ctl_smpte_fps_put
636 };
637
638
snd_mts64_ctl_create(struct snd_card * card,struct mts64 * mts)639 static int snd_mts64_ctl_create(struct snd_card *card,
640 struct mts64 *mts)
641 {
642 int err, i;
643 static const struct snd_kcontrol_new *control[] = {
644 &mts64_ctl_smpte_switch,
645 &mts64_ctl_smpte_time_hours,
646 &mts64_ctl_smpte_time_minutes,
647 &mts64_ctl_smpte_time_seconds,
648 &mts64_ctl_smpte_time_frames,
649 &mts64_ctl_smpte_fps,
650 NULL };
651
652 for (i = 0; control[i]; ++i) {
653 err = snd_ctl_add(card, snd_ctl_new1(control[i], mts));
654 if (err < 0) {
655 dev_dbg(card->dev, "Cannot create control: %s\n",
656 control[i]->name);
657 return err;
658 }
659 }
660
661 return 0;
662 }
663
664 /*********************************************************************
665 * Rawmidi
666 *********************************************************************/
667 #define MTS64_MODE_INPUT_TRIGGERED 0x01
668
snd_mts64_rawmidi_open(struct snd_rawmidi_substream * substream)669 static int snd_mts64_rawmidi_open(struct snd_rawmidi_substream *substream)
670 {
671 struct mts64 *mts = substream->rmidi->private_data;
672
673 if (mts->open_count == 0) {
674 /* We don't need a spinlock here, because this is just called
675 if the device has not been opened before.
676 So there aren't any IRQs from the device */
677 mts64_device_open(mts);
678
679 msleep(50);
680 }
681 ++(mts->open_count);
682
683 return 0;
684 }
685
snd_mts64_rawmidi_close(struct snd_rawmidi_substream * substream)686 static int snd_mts64_rawmidi_close(struct snd_rawmidi_substream *substream)
687 {
688 struct mts64 *mts = substream->rmidi->private_data;
689 unsigned long flags;
690
691 --(mts->open_count);
692 if (mts->open_count == 0) {
693 /* We need the spinlock_irqsave here because we can still
694 have IRQs at this point */
695 spin_lock_irqsave(&mts->lock, flags);
696 mts64_device_close(mts);
697 spin_unlock_irqrestore(&mts->lock, flags);
698
699 msleep(500);
700
701 } else if (mts->open_count < 0)
702 mts->open_count = 0;
703
704 return 0;
705 }
706
snd_mts64_rawmidi_output_trigger(struct snd_rawmidi_substream * substream,int up)707 static void snd_mts64_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,
708 int up)
709 {
710 struct mts64 *mts = substream->rmidi->private_data;
711 u8 data;
712 unsigned long flags;
713
714 spin_lock_irqsave(&mts->lock, flags);
715 while (snd_rawmidi_transmit_peek(substream, &data, 1) == 1) {
716 mts64_write_midi(mts, data, substream->number+1);
717 snd_rawmidi_transmit_ack(substream, 1);
718 }
719 spin_unlock_irqrestore(&mts->lock, flags);
720 }
721
snd_mts64_rawmidi_input_trigger(struct snd_rawmidi_substream * substream,int up)722 static void snd_mts64_rawmidi_input_trigger(struct snd_rawmidi_substream *substream,
723 int up)
724 {
725 struct mts64 *mts = substream->rmidi->private_data;
726 unsigned long flags;
727
728 spin_lock_irqsave(&mts->lock, flags);
729 if (up)
730 mts->mode[substream->number] |= MTS64_MODE_INPUT_TRIGGERED;
731 else
732 mts->mode[substream->number] &= ~MTS64_MODE_INPUT_TRIGGERED;
733
734 spin_unlock_irqrestore(&mts->lock, flags);
735 }
736
737 static const struct snd_rawmidi_ops snd_mts64_rawmidi_output_ops = {
738 .open = snd_mts64_rawmidi_open,
739 .close = snd_mts64_rawmidi_close,
740 .trigger = snd_mts64_rawmidi_output_trigger
741 };
742
743 static const struct snd_rawmidi_ops snd_mts64_rawmidi_input_ops = {
744 .open = snd_mts64_rawmidi_open,
745 .close = snd_mts64_rawmidi_close,
746 .trigger = snd_mts64_rawmidi_input_trigger
747 };
748
749 /* Create and initialize the rawmidi component */
snd_mts64_rawmidi_create(struct snd_card * card)750 static int snd_mts64_rawmidi_create(struct snd_card *card)
751 {
752 struct mts64 *mts = card->private_data;
753 struct snd_rawmidi *rmidi;
754 struct snd_rawmidi_substream *substream;
755 struct list_head *list;
756 int err;
757
758 err = snd_rawmidi_new(card, CARD_NAME, 0,
759 MTS64_NUM_OUTPUT_PORTS,
760 MTS64_NUM_INPUT_PORTS,
761 &rmidi);
762 if (err < 0)
763 return err;
764
765 rmidi->private_data = mts;
766 strcpy(rmidi->name, CARD_NAME);
767 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
768 SNDRV_RAWMIDI_INFO_INPUT |
769 SNDRV_RAWMIDI_INFO_DUPLEX;
770
771 mts->rmidi = rmidi;
772
773 /* register rawmidi ops */
774 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
775 &snd_mts64_rawmidi_output_ops);
776 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
777 &snd_mts64_rawmidi_input_ops);
778
779 /* name substreams */
780 /* output */
781 list_for_each(list,
782 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
783 substream = list_entry(list, struct snd_rawmidi_substream, list);
784 sprintf(substream->name,
785 "Miditerminal %d", substream->number+1);
786 }
787 /* input */
788 list_for_each(list,
789 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
790 substream = list_entry(list, struct snd_rawmidi_substream, list);
791 mts->midi_input_substream[substream->number] = substream;
792 switch(substream->number) {
793 case MTS64_SMPTE_SUBSTREAM:
794 strcpy(substream->name, "Miditerminal SMPTE");
795 break;
796 default:
797 sprintf(substream->name,
798 "Miditerminal %d", substream->number+1);
799 }
800 }
801
802 /* controls */
803 err = snd_mts64_ctl_create(card, mts);
804
805 return err;
806 }
807
808 /*********************************************************************
809 * parport stuff
810 *********************************************************************/
snd_mts64_interrupt(void * private)811 static void snd_mts64_interrupt(void *private)
812 {
813 struct mts64 *mts = ((struct snd_card*)private)->private_data;
814 u16 ret;
815 u8 status, data;
816 struct snd_rawmidi_substream *substream;
817
818 if (!mts)
819 return;
820
821 spin_lock(&mts->lock);
822 ret = mts64_read(mts->pardev->port);
823 data = ret & 0x00ff;
824 status = ret >> 8;
825
826 if (status & MTS64_STAT_PORT) {
827 mts->current_midi_input_port = mts64_map_midi_input(data);
828 } else {
829 if (mts->current_midi_input_port == -1)
830 goto __out;
831 substream = mts->midi_input_substream[mts->current_midi_input_port];
832 if (mts->mode[substream->number] & MTS64_MODE_INPUT_TRIGGERED)
833 snd_rawmidi_receive(substream, &data, 1);
834 }
835 __out:
836 spin_unlock(&mts->lock);
837 }
838
snd_mts64_attach(struct parport * p)839 static void snd_mts64_attach(struct parport *p)
840 {
841 struct platform_device *device;
842
843 device = platform_device_alloc(PLATFORM_DRIVER, device_count);
844 if (!device)
845 return;
846
847 /* Temporary assignment to forward the parport */
848 platform_set_drvdata(device, p);
849
850 if (platform_device_add(device) < 0) {
851 platform_device_put(device);
852 return;
853 }
854
855 /* Since we dont get the return value of probe
856 * We need to check if device probing succeeded or not */
857 if (!platform_get_drvdata(device)) {
858 platform_device_unregister(device);
859 return;
860 }
861
862 /* register device in global table */
863 platform_devices[device_count] = device;
864 device_count++;
865 }
866
snd_mts64_detach(struct parport * p)867 static void snd_mts64_detach(struct parport *p)
868 {
869 /* nothing to do here */
870 }
871
snd_mts64_dev_probe(struct pardevice * pardev)872 static int snd_mts64_dev_probe(struct pardevice *pardev)
873 {
874 if (strcmp(pardev->name, DRIVER_NAME))
875 return -ENODEV;
876
877 return 0;
878 }
879
880 static struct parport_driver mts64_parport_driver = {
881 .name = "mts64",
882 .probe = snd_mts64_dev_probe,
883 .match_port = snd_mts64_attach,
884 .detach = snd_mts64_detach,
885 };
886
887 /*********************************************************************
888 * platform stuff
889 *********************************************************************/
snd_mts64_card_private_free(struct snd_card * card)890 static void snd_mts64_card_private_free(struct snd_card *card)
891 {
892 struct mts64 *mts = card->private_data;
893 struct pardevice *pardev = mts->pardev;
894
895 if (pardev) {
896 parport_release(pardev);
897 parport_unregister_device(pardev);
898 }
899
900 snd_mts64_free(mts);
901 }
902
snd_mts64_probe(struct platform_device * pdev)903 static int snd_mts64_probe(struct platform_device *pdev)
904 {
905 struct pardevice *pardev;
906 struct parport *p;
907 int dev = pdev->id;
908 struct snd_card *card = NULL;
909 struct mts64 *mts = NULL;
910 int err;
911 struct pardev_cb mts64_cb = {
912 .preempt = NULL,
913 .wakeup = NULL,
914 .irq_func = snd_mts64_interrupt, /* ISR */
915 .flags = PARPORT_DEV_EXCL, /* flags */
916 };
917
918 p = platform_get_drvdata(pdev);
919 platform_set_drvdata(pdev, NULL);
920
921 if (dev >= SNDRV_CARDS)
922 return -ENODEV;
923 if (!enable[dev])
924 return -ENOENT;
925
926 err = snd_card_new(&pdev->dev, index[dev], id[dev], THIS_MODULE,
927 0, &card);
928 if (err < 0) {
929 dev_dbg(&pdev->dev, "Cannot create card\n");
930 return err;
931 }
932 strcpy(card->driver, DRIVER_NAME);
933 strcpy(card->shortname, "ESI " CARD_NAME);
934 sprintf(card->longname, "%s at 0x%lx, irq %i",
935 card->shortname, p->base, p->irq);
936
937 mts64_cb.private = card; /* private */
938 pardev = parport_register_dev_model(p, /* port */
939 DRIVER_NAME, /* name */
940 &mts64_cb, /* callbacks */
941 pdev->id); /* device number */
942 if (!pardev) {
943 dev_dbg(card->dev, "Cannot register pardevice\n");
944 err = -EIO;
945 goto __err;
946 }
947
948 /* claim parport */
949 if (parport_claim(pardev)) {
950 dev_dbg(card->dev, "Cannot claim parport 0x%lx\n", pardev->port->base);
951 err = -EIO;
952 goto free_pardev;
953 }
954
955 err = snd_mts64_create(card, pardev, &mts);
956 if (err < 0) {
957 dev_dbg(card->dev, "Cannot create main component\n");
958 goto release_pardev;
959 }
960 card->private_data = mts;
961 card->private_free = snd_mts64_card_private_free;
962
963 err = mts64_probe(p);
964 if (err) {
965 err = -EIO;
966 goto __err;
967 }
968
969 err = snd_mts64_rawmidi_create(card);
970 if (err < 0) {
971 dev_dbg(card->dev, "Creating Rawmidi component failed\n");
972 goto __err;
973 }
974
975 /* init device */
976 err = mts64_device_init(p);
977 if (err < 0)
978 goto __err;
979
980 platform_set_drvdata(pdev, card);
981
982 /* At this point card will be usable */
983 err = snd_card_register(card);
984 if (err < 0) {
985 dev_dbg(card->dev, "Cannot register card\n");
986 goto __err;
987 }
988
989 dev_info(card->dev, "ESI Miditerminal 4140 on 0x%lx\n", p->base);
990 return 0;
991
992 release_pardev:
993 parport_release(pardev);
994 free_pardev:
995 parport_unregister_device(pardev);
996 __err:
997 snd_card_free(card);
998 return err;
999 }
1000
snd_mts64_remove(struct platform_device * pdev)1001 static void snd_mts64_remove(struct platform_device *pdev)
1002 {
1003 struct snd_card *card = platform_get_drvdata(pdev);
1004
1005 if (card)
1006 snd_card_free(card);
1007 }
1008
1009 static struct platform_driver snd_mts64_driver = {
1010 .probe = snd_mts64_probe,
1011 .remove_new = snd_mts64_remove,
1012 .driver = {
1013 .name = PLATFORM_DRIVER,
1014 }
1015 };
1016
1017 /*********************************************************************
1018 * module init stuff
1019 *********************************************************************/
snd_mts64_unregister_all(void)1020 static void snd_mts64_unregister_all(void)
1021 {
1022 int i;
1023
1024 for (i = 0; i < SNDRV_CARDS; ++i) {
1025 if (platform_devices[i]) {
1026 platform_device_unregister(platform_devices[i]);
1027 platform_devices[i] = NULL;
1028 }
1029 }
1030 platform_driver_unregister(&snd_mts64_driver);
1031 parport_unregister_driver(&mts64_parport_driver);
1032 }
1033
snd_mts64_module_init(void)1034 static int __init snd_mts64_module_init(void)
1035 {
1036 int err;
1037
1038 err = platform_driver_register(&snd_mts64_driver);
1039 if (err < 0)
1040 return err;
1041
1042 if (parport_register_driver(&mts64_parport_driver) != 0) {
1043 platform_driver_unregister(&snd_mts64_driver);
1044 return -EIO;
1045 }
1046
1047 if (device_count == 0) {
1048 snd_mts64_unregister_all();
1049 return -ENODEV;
1050 }
1051
1052 return 0;
1053 }
1054
snd_mts64_module_exit(void)1055 static void __exit snd_mts64_module_exit(void)
1056 {
1057 snd_mts64_unregister_all();
1058 }
1059
1060 module_init(snd_mts64_module_init);
1061 module_exit(snd_mts64_module_exit);
1062