xref: /openbmc/linux/sound/drivers/mts64.c (revision b6dcefde)
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);
1089