Version:  2.0.40 2.2.26 2.4.37 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7

Linux/sound/drivers/mts64.c

  1 /*     
  2  *   ALSA Driver for Ego Systems Inc. (ESI) Miditerminal 4140
  3  *   Copyright (c) 2006 by Matthias K├Ânig <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 bool 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 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 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 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 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 = {
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 = {
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 = {
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 = {
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 = {
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 const char * const texts[5] = {
606                 "24", "25", "29.97", "30D", "30"
607         };
608 
609         return snd_ctl_enum_info(uinfo, 1, 5, texts);
610 }
611 
612 static int snd_mts64_ctl_smpte_fps_get(struct snd_kcontrol *kctl,
613                                        struct snd_ctl_elem_value *uctl)
614 {
615         struct mts64 *mts = snd_kcontrol_chip(kctl);
616 
617         spin_lock_irq(&mts->lock);
618         uctl->value.enumerated.item[0] = mts->fps;
619         spin_unlock_irq(&mts->lock);
620 
621         return 0;
622 }
623 
624 static int snd_mts64_ctl_smpte_fps_put(struct snd_kcontrol *kctl,
625                                        struct snd_ctl_elem_value *uctl)
626 {
627         struct mts64 *mts = snd_kcontrol_chip(kctl);
628         int changed = 0;
629 
630         if (uctl->value.enumerated.item[0] >= 5)
631                 return -EINVAL;
632         spin_lock_irq(&mts->lock);
633         if (mts->fps != uctl->value.enumerated.item[0]) {
634                 changed = 1;
635                 mts->fps = uctl->value.enumerated.item[0];
636         }
637         spin_unlock_irq(&mts->lock);
638 
639         return changed;
640 }
641 
642 static struct snd_kcontrol_new mts64_ctl_smpte_fps = {
643         .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
644         .name  = "SMPTE Fps",
645         .index = 0,
646         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
647         .private_value = 0,
648         .info  = snd_mts64_ctl_smpte_fps_info,
649         .get   = snd_mts64_ctl_smpte_fps_get,
650         .put   = snd_mts64_ctl_smpte_fps_put
651 };
652 
653 
654 static int snd_mts64_ctl_create(struct snd_card *card,
655                                 struct mts64 *mts)
656 {
657         int err, i;
658         static struct snd_kcontrol_new *control[] = {
659                 &mts64_ctl_smpte_switch,
660                 &mts64_ctl_smpte_time_hours,
661                 &mts64_ctl_smpte_time_minutes,
662                 &mts64_ctl_smpte_time_seconds,
663                 &mts64_ctl_smpte_time_frames,
664                 &mts64_ctl_smpte_fps,
665                 NULL  };
666 
667         for (i = 0; control[i]; ++i) {
668                 err = snd_ctl_add(card, snd_ctl_new1(control[i], mts));
669                 if (err < 0) {
670                         snd_printd("Cannot create control: %s\n", 
671                                    control[i]->name);
672                         return err;
673                 }
674         }
675 
676         return 0;
677 }
678 
679 /*********************************************************************
680  * Rawmidi
681  *********************************************************************/
682 #define MTS64_MODE_INPUT_TRIGGERED 0x01
683 
684 static int snd_mts64_rawmidi_open(struct snd_rawmidi_substream *substream)
685 {
686         struct mts64 *mts = substream->rmidi->private_data;
687 
688         if (mts->open_count == 0) {
689                 /* We don't need a spinlock here, because this is just called 
690                    if the device has not been opened before. 
691                    So there aren't any IRQs from the device */
692                 mts64_device_open(mts);
693 
694                 msleep(50);
695         }
696         ++(mts->open_count);
697 
698         return 0;
699 }
700 
701 static int snd_mts64_rawmidi_close(struct snd_rawmidi_substream *substream)
702 {
703         struct mts64 *mts = substream->rmidi->private_data;
704         unsigned long flags;
705 
706         --(mts->open_count);
707         if (mts->open_count == 0) {
708                 /* We need the spinlock_irqsave here because we can still
709                    have IRQs at this point */
710                 spin_lock_irqsave(&mts->lock, flags);
711                 mts64_device_close(mts);
712                 spin_unlock_irqrestore(&mts->lock, flags);
713 
714                 msleep(500);
715 
716         } else if (mts->open_count < 0)
717                 mts->open_count = 0;
718 
719         return 0;
720 }
721 
722 static void snd_mts64_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,
723                                              int up)
724 {
725         struct mts64 *mts = substream->rmidi->private_data;
726         u8 data;
727         unsigned long flags;
728 
729         spin_lock_irqsave(&mts->lock, flags);
730         while (snd_rawmidi_transmit_peek(substream, &data, 1) == 1) {
731                 mts64_write_midi(mts, data, substream->number+1);
732                 snd_rawmidi_transmit_ack(substream, 1);
733         }
734         spin_unlock_irqrestore(&mts->lock, flags);
735 }
736 
737 static void snd_mts64_rawmidi_input_trigger(struct snd_rawmidi_substream *substream,
738                                             int up)
739 {
740         struct mts64 *mts = substream->rmidi->private_data;
741         unsigned long flags;
742 
743         spin_lock_irqsave(&mts->lock, flags);
744         if (up)
745                 mts->mode[substream->number] |= MTS64_MODE_INPUT_TRIGGERED;
746         else
747                 mts->mode[substream->number] &= ~MTS64_MODE_INPUT_TRIGGERED;
748         
749         spin_unlock_irqrestore(&mts->lock, flags);
750 }
751 
752 static struct snd_rawmidi_ops snd_mts64_rawmidi_output_ops = {
753         .open    = snd_mts64_rawmidi_open,
754         .close   = snd_mts64_rawmidi_close,
755         .trigger = snd_mts64_rawmidi_output_trigger
756 };
757 
758 static struct snd_rawmidi_ops snd_mts64_rawmidi_input_ops = {
759         .open    = snd_mts64_rawmidi_open,
760         .close   = snd_mts64_rawmidi_close,
761         .trigger = snd_mts64_rawmidi_input_trigger
762 };
763 
764 /* Create and initialize the rawmidi component */
765 static int snd_mts64_rawmidi_create(struct snd_card *card)
766 {
767         struct mts64 *mts = card->private_data;
768         struct snd_rawmidi *rmidi;
769         struct snd_rawmidi_substream *substream;
770         struct list_head *list;
771         int err;
772         
773         err = snd_rawmidi_new(card, CARD_NAME, 0, 
774                               MTS64_NUM_OUTPUT_PORTS, 
775                               MTS64_NUM_INPUT_PORTS, 
776                               &rmidi);
777         if (err < 0) 
778                 return err;
779 
780         rmidi->private_data = mts;
781         strcpy(rmidi->name, CARD_NAME);
782         rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
783                             SNDRV_RAWMIDI_INFO_INPUT |
784                             SNDRV_RAWMIDI_INFO_DUPLEX;
785 
786         mts->rmidi = rmidi;
787 
788         /* register rawmidi ops */
789         snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 
790                             &snd_mts64_rawmidi_output_ops);
791         snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 
792                             &snd_mts64_rawmidi_input_ops);
793 
794         /* name substreams */
795         /* output */
796         list_for_each(list, 
797                       &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
798                 substream = list_entry(list, struct snd_rawmidi_substream, list);
799                 sprintf(substream->name,
800                         "Miditerminal %d", substream->number+1);
801         }
802         /* input */
803         list_for_each(list, 
804                       &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
805                 substream = list_entry(list, struct snd_rawmidi_substream, list);
806                 mts->midi_input_substream[substream->number] = substream;
807                 switch(substream->number) {
808                 case MTS64_SMPTE_SUBSTREAM:
809                         strcpy(substream->name, "Miditerminal SMPTE");
810                         break;
811                 default:
812                         sprintf(substream->name,
813                                 "Miditerminal %d", substream->number+1);
814                 }
815         }
816 
817         /* controls */
818         err = snd_mts64_ctl_create(card, mts);
819 
820         return err;
821 }
822 
823 /*********************************************************************
824  * parport stuff
825  *********************************************************************/
826 static void snd_mts64_interrupt(void *private)
827 {
828         struct mts64 *mts = ((struct snd_card*)private)->private_data;
829         u16 ret;
830         u8 status, data;
831         struct snd_rawmidi_substream *substream;
832 
833         spin_lock(&mts->lock);
834         ret = mts64_read(mts->pardev->port);
835         data = ret & 0x00ff;
836         status = ret >> 8;
837 
838         if (status & MTS64_STAT_PORT) {
839                 mts->current_midi_input_port = mts64_map_midi_input(data);
840         } else {
841                 if (mts->current_midi_input_port == -1) 
842                         goto __out;
843                 substream = mts->midi_input_substream[mts->current_midi_input_port];
844                 if (mts->mode[substream->number] & MTS64_MODE_INPUT_TRIGGERED)
845                         snd_rawmidi_receive(substream, &data, 1);
846         }
847 __out:
848         spin_unlock(&mts->lock);
849 }
850 
851 static void snd_mts64_attach(struct parport *p)
852 {
853         struct platform_device *device;
854 
855         device = platform_device_alloc(PLATFORM_DRIVER, device_count);
856         if (!device)
857                 return;
858 
859         /* Temporary assignment to forward the parport */
860         platform_set_drvdata(device, p);
861 
862         if (platform_device_add(device) < 0) {
863                 platform_device_put(device);
864                 return;
865         }
866 
867         /* Since we dont get the return value of probe
868          * We need to check if device probing succeeded or not */
869         if (!platform_get_drvdata(device)) {
870                 platform_device_unregister(device);
871                 return;
872         }
873 
874         /* register device in global table */
875         platform_devices[device_count] = device;
876         device_count++;
877 }
878 
879 static void snd_mts64_detach(struct parport *p)
880 {
881         /* nothing to do here */
882 }
883 
884 static int snd_mts64_dev_probe(struct pardevice *pardev)
885 {
886         if (strcmp(pardev->name, DRIVER_NAME))
887                 return -ENODEV;
888 
889         return 0;
890 }
891 
892 static struct parport_driver mts64_parport_driver = {
893         .name           = "mts64",
894         .probe          = snd_mts64_dev_probe,
895         .match_port     = snd_mts64_attach,
896         .detach         = snd_mts64_detach,
897         .devmodel       = true,
898 };
899 
900 /*********************************************************************
901  * platform stuff
902  *********************************************************************/
903 static void snd_mts64_card_private_free(struct snd_card *card)
904 {
905         struct mts64 *mts = card->private_data;
906         struct pardevice *pardev = mts->pardev;
907 
908         if (pardev) {
909                 parport_release(pardev);
910                 parport_unregister_device(pardev);
911         }
912 
913         snd_mts64_free(mts);
914 }
915 
916 static int snd_mts64_probe(struct platform_device *pdev)
917 {
918         struct pardevice *pardev;
919         struct parport *p;
920         int dev = pdev->id;
921         struct snd_card *card = NULL;
922         struct mts64 *mts = NULL;
923         int err;
924         struct pardev_cb mts64_cb = {
925                 .preempt = NULL,
926                 .wakeup = NULL,
927                 .irq_func = snd_mts64_interrupt,        /* ISR */
928                 .flags = PARPORT_DEV_EXCL,              /* flags */
929         };
930 
931         p = platform_get_drvdata(pdev);
932         platform_set_drvdata(pdev, NULL);
933 
934         if (dev >= SNDRV_CARDS)
935                 return -ENODEV;
936         if (!enable[dev]) 
937                 return -ENOENT;
938 
939         err = snd_card_new(&pdev->dev, index[dev], id[dev], THIS_MODULE,
940                            0, &card);
941         if (err < 0) {
942                 snd_printd("Cannot create card\n");
943                 return err;
944         }
945         strcpy(card->driver, DRIVER_NAME);
946         strcpy(card->shortname, "ESI " CARD_NAME);
947         sprintf(card->longname,  "%s at 0x%lx, irq %i", 
948                 card->shortname, p->base, p->irq);
949 
950         mts64_cb.private = card;                         /* private */
951         pardev = parport_register_dev_model(p,           /* port */
952                                             DRIVER_NAME, /* name */
953                                             &mts64_cb,   /* callbacks */
954                                             pdev->id);   /* device number */
955         if (!pardev) {
956                 snd_printd("Cannot register pardevice\n");
957                 err = -EIO;
958                 goto __err;
959         }
960 
961         /* claim parport */
962         if (parport_claim(pardev)) {
963                 snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base);
964                 err = -EIO;
965                 goto free_pardev;
966         }
967 
968         if ((err = snd_mts64_create(card, pardev, &mts)) < 0) {
969                 snd_printd("Cannot create main component\n");
970                 goto release_pardev;
971         }
972         card->private_data = mts;
973         card->private_free = snd_mts64_card_private_free;
974 
975         err = mts64_probe(p);
976         if (err) {
977                 err = -EIO;
978                 goto __err;
979         }
980         
981         if ((err = snd_mts64_rawmidi_create(card)) < 0) {
982                 snd_printd("Creating Rawmidi component failed\n");
983                 goto __err;
984         }
985 
986         /* init device */
987         if ((err = mts64_device_init(p)) < 0)
988                 goto __err;
989 
990         platform_set_drvdata(pdev, card);
991 
992         /* At this point card will be usable */
993         if ((err = snd_card_register(card)) < 0) {
994                 snd_printd("Cannot register card\n");
995                 goto __err;
996         }
997 
998         snd_printk(KERN_INFO "ESI Miditerminal 4140 on 0x%lx\n", p->base);
999         return 0;
1000 
1001 release_pardev:
1002         parport_release(pardev);
1003 free_pardev:
1004         parport_unregister_device(pardev);
1005 __err:
1006         snd_card_free(card);
1007         return err;
1008 }
1009 
1010 static int snd_mts64_remove(struct platform_device *pdev)
1011 {
1012         struct snd_card *card = platform_get_drvdata(pdev);
1013 
1014         if (card)
1015                 snd_card_free(card);
1016 
1017         return 0;
1018 }
1019 
1020 static struct platform_driver snd_mts64_driver = {
1021         .probe  = snd_mts64_probe,
1022         .remove = snd_mts64_remove,
1023         .driver = {
1024                 .name = PLATFORM_DRIVER,
1025         }
1026 };
1027 
1028 /*********************************************************************
1029  * module init stuff
1030  *********************************************************************/
1031 static void snd_mts64_unregister_all(void)
1032 {
1033         int i;
1034 
1035         for (i = 0; i < SNDRV_CARDS; ++i) {
1036                 if (platform_devices[i]) {
1037                         platform_device_unregister(platform_devices[i]);
1038                         platform_devices[i] = NULL;
1039                 }
1040         }               
1041         platform_driver_unregister(&snd_mts64_driver);
1042         parport_unregister_driver(&mts64_parport_driver);
1043 }
1044 
1045 static int __init snd_mts64_module_init(void)
1046 {
1047         int err;
1048 
1049         if ((err = platform_driver_register(&snd_mts64_driver)) < 0)
1050                 return err;
1051 
1052         if (parport_register_driver(&mts64_parport_driver) != 0) {
1053                 platform_driver_unregister(&snd_mts64_driver);
1054                 return -EIO;
1055         }
1056 
1057         if (device_count == 0) {
1058                 snd_mts64_unregister_all();
1059                 return -ENODEV;
1060         }
1061 
1062         return 0;
1063 }
1064 
1065 static void __exit snd_mts64_module_exit(void)
1066 {
1067         snd_mts64_unregister_all();
1068 }
1069 
1070 module_init(snd_mts64_module_init);
1071 module_exit(snd_mts64_module_exit);
1072 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us