1 /*
2 * HID driver for the Prodikeys PC-MIDI Keyboard
3 * providing midi & extra multimedia keys functionality
4 *
5 * Copyright (c) 2009 Don Prince <dhprince.devel@yahoo.co.uk>
6 *
7 * Controls for Octave Shift Up/Down, Channel, and
8 * Sustain Duration available via sysfs.
9 *
10 */
11
12 /*
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the Free
15 * Software Foundation; either version 2 of the License, or (at your option)
16 * any later version.
17 */
18
19 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
20
21 #include <linux/device.h>
22 #include <linux/module.h>
23 #include <linux/usb.h>
24 #include <linux/mutex.h>
25 #include <linux/hid.h>
26 #include <sound/core.h>
27 #include <sound/initval.h>
28 #include <sound/rawmidi.h>
29 #include "hid-ids.h"
30
31
32 #define pk_debug(format, arg...) \
33 pr_debug("hid-prodikeys: " format "\n" , ## arg)
34 #define pk_error(format, arg...) \
35 pr_err("hid-prodikeys: " format "\n" , ## arg)
36
37 struct pcmidi_snd;
38
39 struct pk_device {
40 unsigned long quirks;
41
42 struct hid_device *hdev;
43 struct pcmidi_snd *pm; /* pcmidi device context */
44 };
45
46 struct pcmidi_sustain {
47 unsigned long in_use;
48 struct pcmidi_snd *pm;
49 struct timer_list timer;
50 unsigned char status;
51 unsigned char note;
52 unsigned char velocity;
53 };
54
55 #define PCMIDI_SUSTAINED_MAX 32
56 struct pcmidi_snd {
57 struct pk_device *pk;
58 unsigned short ifnum;
59 struct hid_report *pcmidi_report6;
60 struct input_dev *input_ep82;
61 unsigned short midi_mode;
62 unsigned short midi_sustain_mode;
63 unsigned short midi_sustain;
64 unsigned short midi_channel;
65 short midi_octave;
66 struct pcmidi_sustain sustained_notes[PCMIDI_SUSTAINED_MAX];
67 unsigned short fn_state;
68 unsigned short last_key[24];
69 spinlock_t rawmidi_in_lock;
70 struct snd_card *card;
71 struct snd_rawmidi *rwmidi;
72 struct snd_rawmidi_substream *in_substream;
73 struct snd_rawmidi_substream *out_substream;
74 unsigned long in_triggered;
75 unsigned long out_active;
76 };
77
78 #define PK_QUIRK_NOGET 0x00010000
79 #define PCMIDI_MIDDLE_C 60
80 #define PCMIDI_CHANNEL_MIN 0
81 #define PCMIDI_CHANNEL_MAX 15
82 #define PCMIDI_OCTAVE_MIN (-2)
83 #define PCMIDI_OCTAVE_MAX 2
84 #define PCMIDI_SUSTAIN_MIN 0
85 #define PCMIDI_SUSTAIN_MAX 5000
86
87 static const char shortname[] = "PC-MIDI";
88 static const char longname[] = "Prodikeys PC-MIDI Keyboard";
89
90 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
91 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
92 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
93
94 module_param_array(index, int, NULL, 0444);
95 module_param_array(id, charp, NULL, 0444);
96 module_param_array(enable, bool, NULL, 0444);
97 MODULE_PARM_DESC(index, "Index value for the PC-MIDI virtual audio driver");
98 MODULE_PARM_DESC(id, "ID string for the PC-MIDI virtual audio driver");
99 MODULE_PARM_DESC(enable, "Enable for the PC-MIDI virtual audio driver");
100
101
102 /* Output routine for the sysfs channel file */
show_channel(struct device * dev,struct device_attribute * attr,char * buf)103 static ssize_t show_channel(struct device *dev,
104 struct device_attribute *attr, char *buf)
105 {
106 struct hid_device *hdev = to_hid_device(dev);
107 struct pk_device *pk = hid_get_drvdata(hdev);
108
109 dbg_hid("pcmidi sysfs read channel=%u\n", pk->pm->midi_channel);
110
111 return sprintf(buf, "%u (min:%u, max:%u)\n", pk->pm->midi_channel,
112 PCMIDI_CHANNEL_MIN, PCMIDI_CHANNEL_MAX);
113 }
114
115 /* Input routine for the sysfs channel file */
store_channel(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)116 static ssize_t store_channel(struct device *dev,
117 struct device_attribute *attr, const char *buf, size_t count)
118 {
119 struct hid_device *hdev = to_hid_device(dev);
120 struct pk_device *pk = hid_get_drvdata(hdev);
121
122 unsigned channel = 0;
123
124 if (sscanf(buf, "%u", &channel) > 0 && channel <= PCMIDI_CHANNEL_MAX) {
125 dbg_hid("pcmidi sysfs write channel=%u\n", channel);
126 pk->pm->midi_channel = channel;
127 return strlen(buf);
128 }
129 return -EINVAL;
130 }
131
132 static DEVICE_ATTR(channel, S_IRUGO | S_IWUSR | S_IWGRP , show_channel,
133 store_channel);
134
135 static struct device_attribute *sysfs_device_attr_channel = {
136 &dev_attr_channel,
137 };
138
139 /* Output routine for the sysfs sustain file */
show_sustain(struct device * dev,struct device_attribute * attr,char * buf)140 static ssize_t show_sustain(struct device *dev,
141 struct device_attribute *attr, char *buf)
142 {
143 struct hid_device *hdev = to_hid_device(dev);
144 struct pk_device *pk = hid_get_drvdata(hdev);
145
146 dbg_hid("pcmidi sysfs read sustain=%u\n", pk->pm->midi_sustain);
147
148 return sprintf(buf, "%u (off:%u, max:%u (ms))\n", pk->pm->midi_sustain,
149 PCMIDI_SUSTAIN_MIN, PCMIDI_SUSTAIN_MAX);
150 }
151
152 /* Input routine for the sysfs sustain file */
store_sustain(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)153 static ssize_t store_sustain(struct device *dev,
154 struct device_attribute *attr, const char *buf, size_t count)
155 {
156 struct hid_device *hdev = to_hid_device(dev);
157 struct pk_device *pk = hid_get_drvdata(hdev);
158
159 unsigned sustain = 0;
160
161 if (sscanf(buf, "%u", &sustain) > 0 && sustain <= PCMIDI_SUSTAIN_MAX) {
162 dbg_hid("pcmidi sysfs write sustain=%u\n", sustain);
163 pk->pm->midi_sustain = sustain;
164 pk->pm->midi_sustain_mode =
165 (0 == sustain || !pk->pm->midi_mode) ? 0 : 1;
166 return strlen(buf);
167 }
168 return -EINVAL;
169 }
170
171 static DEVICE_ATTR(sustain, S_IRUGO | S_IWUSR | S_IWGRP, show_sustain,
172 store_sustain);
173
174 static struct device_attribute *sysfs_device_attr_sustain = {
175 &dev_attr_sustain,
176 };
177
178 /* Output routine for the sysfs octave file */
show_octave(struct device * dev,struct device_attribute * attr,char * buf)179 static ssize_t show_octave(struct device *dev,
180 struct device_attribute *attr, char *buf)
181 {
182 struct hid_device *hdev = to_hid_device(dev);
183 struct pk_device *pk = hid_get_drvdata(hdev);
184
185 dbg_hid("pcmidi sysfs read octave=%d\n", pk->pm->midi_octave);
186
187 return sprintf(buf, "%d (min:%d, max:%d)\n", pk->pm->midi_octave,
188 PCMIDI_OCTAVE_MIN, PCMIDI_OCTAVE_MAX);
189 }
190
191 /* Input routine for the sysfs octave file */
store_octave(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)192 static ssize_t store_octave(struct device *dev,
193 struct device_attribute *attr, const char *buf, size_t count)
194 {
195 struct hid_device *hdev = to_hid_device(dev);
196 struct pk_device *pk = hid_get_drvdata(hdev);
197
198 int octave = 0;
199
200 if (sscanf(buf, "%d", &octave) > 0 &&
201 octave >= PCMIDI_OCTAVE_MIN && octave <= PCMIDI_OCTAVE_MAX) {
202 dbg_hid("pcmidi sysfs write octave=%d\n", octave);
203 pk->pm->midi_octave = octave;
204 return strlen(buf);
205 }
206 return -EINVAL;
207 }
208
209 static DEVICE_ATTR(octave, S_IRUGO | S_IWUSR | S_IWGRP, show_octave,
210 store_octave);
211
212 static struct device_attribute *sysfs_device_attr_octave = {
213 &dev_attr_octave,
214 };
215
216
pcmidi_send_note(struct pcmidi_snd * pm,unsigned char status,unsigned char note,unsigned char velocity)217 static void pcmidi_send_note(struct pcmidi_snd *pm,
218 unsigned char status, unsigned char note, unsigned char velocity)
219 {
220 unsigned long flags;
221 unsigned char buffer[3];
222
223 buffer[0] = status;
224 buffer[1] = note;
225 buffer[2] = velocity;
226
227 spin_lock_irqsave(&pm->rawmidi_in_lock, flags);
228
229 if (!pm->in_substream)
230 goto drop_note;
231 if (!test_bit(pm->in_substream->number, &pm->in_triggered))
232 goto drop_note;
233
234 snd_rawmidi_receive(pm->in_substream, buffer, 3);
235
236 drop_note:
237 spin_unlock_irqrestore(&pm->rawmidi_in_lock, flags);
238
239 return;
240 }
241
pcmidi_sustained_note_release(unsigned long data)242 static void pcmidi_sustained_note_release(unsigned long data)
243 {
244 struct pcmidi_sustain *pms = (struct pcmidi_sustain *)data;
245
246 pcmidi_send_note(pms->pm, pms->status, pms->note, pms->velocity);
247 pms->in_use = 0;
248 }
249
init_sustain_timers(struct pcmidi_snd * pm)250 static void init_sustain_timers(struct pcmidi_snd *pm)
251 {
252 struct pcmidi_sustain *pms;
253 unsigned i;
254
255 for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
256 pms = &pm->sustained_notes[i];
257 pms->in_use = 0;
258 pms->pm = pm;
259 setup_timer(&pms->timer, pcmidi_sustained_note_release,
260 (unsigned long)pms);
261 }
262 }
263
stop_sustain_timers(struct pcmidi_snd * pm)264 static void stop_sustain_timers(struct pcmidi_snd *pm)
265 {
266 struct pcmidi_sustain *pms;
267 unsigned i;
268
269 for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
270 pms = &pm->sustained_notes[i];
271 pms->in_use = 1;
272 del_timer_sync(&pms->timer);
273 }
274 }
275
pcmidi_get_output_report(struct pcmidi_snd * pm)276 static int pcmidi_get_output_report(struct pcmidi_snd *pm)
277 {
278 struct hid_device *hdev = pm->pk->hdev;
279 struct hid_report *report;
280
281 list_for_each_entry(report,
282 &hdev->report_enum[HID_OUTPUT_REPORT].report_list, list) {
283 if (!(6 == report->id))
284 continue;
285
286 if (report->maxfield < 1) {
287 hid_err(hdev, "output report is empty\n");
288 break;
289 }
290 if (report->field[0]->report_count != 2) {
291 hid_err(hdev, "field count too low\n");
292 break;
293 }
294 pm->pcmidi_report6 = report;
295 return 0;
296 }
297 /* should never get here */
298 return -ENODEV;
299 }
300
pcmidi_submit_output_report(struct pcmidi_snd * pm,int state)301 static void pcmidi_submit_output_report(struct pcmidi_snd *pm, int state)
302 {
303 struct hid_device *hdev = pm->pk->hdev;
304 struct hid_report *report = pm->pcmidi_report6;
305 report->field[0]->value[0] = 0x01;
306 report->field[0]->value[1] = state;
307
308 hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
309 }
310
pcmidi_handle_report1(struct pcmidi_snd * pm,u8 * data)311 static int pcmidi_handle_report1(struct pcmidi_snd *pm, u8 *data)
312 {
313 u32 bit_mask;
314
315 bit_mask = data[1];
316 bit_mask = (bit_mask << 8) | data[2];
317 bit_mask = (bit_mask << 8) | data[3];
318
319 dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
320
321 /*KEY_MAIL or octave down*/
322 if (pm->midi_mode && bit_mask == 0x004000) {
323 /* octave down */
324 pm->midi_octave--;
325 if (pm->midi_octave < -2)
326 pm->midi_octave = -2;
327 dbg_hid("pcmidi mode: %d octave: %d\n",
328 pm->midi_mode, pm->midi_octave);
329 return 1;
330 }
331 /*KEY_WWW or sustain*/
332 else if (pm->midi_mode && bit_mask == 0x000004) {
333 /* sustain on/off*/
334 pm->midi_sustain_mode ^= 0x1;
335 return 1;
336 }
337
338 return 0; /* continue key processing */
339 }
340
pcmidi_handle_report3(struct pcmidi_snd * pm,u8 * data,int size)341 static int pcmidi_handle_report3(struct pcmidi_snd *pm, u8 *data, int size)
342 {
343 struct pcmidi_sustain *pms;
344 unsigned i, j;
345 unsigned char status, note, velocity;
346
347 unsigned num_notes = (size-1)/2;
348 for (j = 0; j < num_notes; j++) {
349 note = data[j*2+1];
350 velocity = data[j*2+2];
351
352 if (note < 0x81) { /* note on */
353 status = 128 + 16 + pm->midi_channel; /* 1001nnnn */
354 note = note - 0x54 + PCMIDI_MIDDLE_C +
355 (pm->midi_octave * 12);
356 if (0 == velocity)
357 velocity = 1; /* force note on */
358 } else { /* note off */
359 status = 128 + pm->midi_channel; /* 1000nnnn */
360 note = note - 0x94 + PCMIDI_MIDDLE_C +
361 (pm->midi_octave*12);
362
363 if (pm->midi_sustain_mode) {
364 for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
365 pms = &pm->sustained_notes[i];
366 if (!pms->in_use) {
367 pms->status = status;
368 pms->note = note;
369 pms->velocity = velocity;
370 pms->in_use = 1;
371
372 mod_timer(&pms->timer,
373 jiffies +
374 msecs_to_jiffies(pm->midi_sustain));
375 return 1;
376 }
377 }
378 }
379 }
380 pcmidi_send_note(pm, status, note, velocity);
381 }
382
383 return 1;
384 }
385
pcmidi_handle_report4(struct pcmidi_snd * pm,u8 * data)386 static int pcmidi_handle_report4(struct pcmidi_snd *pm, u8 *data)
387 {
388 unsigned key;
389 u32 bit_mask;
390 u32 bit_index;
391
392 bit_mask = data[1];
393 bit_mask = (bit_mask << 8) | data[2];
394 bit_mask = (bit_mask << 8) | data[3];
395
396 /* break keys */
397 for (bit_index = 0; bit_index < 24; bit_index++) {
398 if (!((0x01 << bit_index) & bit_mask)) {
399 input_event(pm->input_ep82, EV_KEY,
400 pm->last_key[bit_index], 0);
401 pm->last_key[bit_index] = 0;
402 }
403 }
404
405 /* make keys */
406 for (bit_index = 0; bit_index < 24; bit_index++) {
407 key = 0;
408 switch ((0x01 << bit_index) & bit_mask) {
409 case 0x000010: /* Fn lock*/
410 pm->fn_state ^= 0x000010;
411 if (pm->fn_state)
412 pcmidi_submit_output_report(pm, 0xc5);
413 else
414 pcmidi_submit_output_report(pm, 0xc6);
415 continue;
416 case 0x020000: /* midi launcher..send a key (qwerty) or not? */
417 pcmidi_submit_output_report(pm, 0xc1);
418 pm->midi_mode ^= 0x01;
419
420 dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
421 continue;
422 case 0x100000: /* KEY_MESSENGER or octave up */
423 dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
424 if (pm->midi_mode) {
425 pm->midi_octave++;
426 if (pm->midi_octave > 2)
427 pm->midi_octave = 2;
428 dbg_hid("pcmidi mode: %d octave: %d\n",
429 pm->midi_mode, pm->midi_octave);
430 continue;
431 } else
432 key = KEY_MESSENGER;
433 break;
434 case 0x400000:
435 key = KEY_CALENDAR;
436 break;
437 case 0x080000:
438 key = KEY_ADDRESSBOOK;
439 break;
440 case 0x040000:
441 key = KEY_DOCUMENTS;
442 break;
443 case 0x800000:
444 key = KEY_WORDPROCESSOR;
445 break;
446 case 0x200000:
447 key = KEY_SPREADSHEET;
448 break;
449 case 0x010000:
450 key = KEY_COFFEE;
451 break;
452 case 0x000100:
453 key = KEY_HELP;
454 break;
455 case 0x000200:
456 key = KEY_SEND;
457 break;
458 case 0x000400:
459 key = KEY_REPLY;
460 break;
461 case 0x000800:
462 key = KEY_FORWARDMAIL;
463 break;
464 case 0x001000:
465 key = KEY_NEW;
466 break;
467 case 0x002000:
468 key = KEY_OPEN;
469 break;
470 case 0x004000:
471 key = KEY_CLOSE;
472 break;
473 case 0x008000:
474 key = KEY_SAVE;
475 break;
476 case 0x000001:
477 key = KEY_UNDO;
478 break;
479 case 0x000002:
480 key = KEY_REDO;
481 break;
482 case 0x000004:
483 key = KEY_SPELLCHECK;
484 break;
485 case 0x000008:
486 key = KEY_PRINT;
487 break;
488 }
489 if (key) {
490 input_event(pm->input_ep82, EV_KEY, key, 1);
491 pm->last_key[bit_index] = key;
492 }
493 }
494
495 return 1;
496 }
497
pcmidi_handle_report(struct pcmidi_snd * pm,unsigned report_id,u8 * data,int size)498 static int pcmidi_handle_report(
499 struct pcmidi_snd *pm, unsigned report_id, u8 *data, int size)
500 {
501 int ret = 0;
502
503 switch (report_id) {
504 case 0x01: /* midi keys (qwerty)*/
505 ret = pcmidi_handle_report1(pm, data);
506 break;
507 case 0x03: /* midi keyboard (musical)*/
508 ret = pcmidi_handle_report3(pm, data, size);
509 break;
510 case 0x04: /* multimedia/midi keys (qwerty)*/
511 ret = pcmidi_handle_report4(pm, data);
512 break;
513 }
514 return ret;
515 }
516
pcmidi_setup_extra_keys(struct pcmidi_snd * pm,struct input_dev * input)517 static void pcmidi_setup_extra_keys(
518 struct pcmidi_snd *pm, struct input_dev *input)
519 {
520 /* reassigned functionality for N/A keys
521 MY PICTURES => KEY_WORDPROCESSOR
522 MY MUSIC=> KEY_SPREADSHEET
523 */
524 unsigned int keys[] = {
525 KEY_FN,
526 KEY_MESSENGER, KEY_CALENDAR,
527 KEY_ADDRESSBOOK, KEY_DOCUMENTS,
528 KEY_WORDPROCESSOR,
529 KEY_SPREADSHEET,
530 KEY_COFFEE,
531 KEY_HELP, KEY_SEND,
532 KEY_REPLY, KEY_FORWARDMAIL,
533 KEY_NEW, KEY_OPEN,
534 KEY_CLOSE, KEY_SAVE,
535 KEY_UNDO, KEY_REDO,
536 KEY_SPELLCHECK, KEY_PRINT,
537 0
538 };
539
540 unsigned int *pkeys = &keys[0];
541 unsigned short i;
542
543 if (pm->ifnum != 1) /* only set up ONCE for interace 1 */
544 return;
545
546 pm->input_ep82 = input;
547
548 for (i = 0; i < 24; i++)
549 pm->last_key[i] = 0;
550
551 while (*pkeys != 0) {
552 set_bit(*pkeys, pm->input_ep82->keybit);
553 ++pkeys;
554 }
555 }
556
pcmidi_set_operational(struct pcmidi_snd * pm)557 static int pcmidi_set_operational(struct pcmidi_snd *pm)
558 {
559 int rc;
560
561 if (pm->ifnum != 1)
562 return 0; /* only set up ONCE for interace 1 */
563
564 rc = pcmidi_get_output_report(pm);
565 if (rc < 0)
566 return rc;
567 pcmidi_submit_output_report(pm, 0xc1);
568 return 0;
569 }
570
pcmidi_snd_free(struct snd_device * dev)571 static int pcmidi_snd_free(struct snd_device *dev)
572 {
573 return 0;
574 }
575
pcmidi_in_open(struct snd_rawmidi_substream * substream)576 static int pcmidi_in_open(struct snd_rawmidi_substream *substream)
577 {
578 struct pcmidi_snd *pm = substream->rmidi->private_data;
579
580 dbg_hid("pcmidi in open\n");
581 pm->in_substream = substream;
582 return 0;
583 }
584
pcmidi_in_close(struct snd_rawmidi_substream * substream)585 static int pcmidi_in_close(struct snd_rawmidi_substream *substream)
586 {
587 dbg_hid("pcmidi in close\n");
588 return 0;
589 }
590
pcmidi_in_trigger(struct snd_rawmidi_substream * substream,int up)591 static void pcmidi_in_trigger(struct snd_rawmidi_substream *substream, int up)
592 {
593 struct pcmidi_snd *pm = substream->rmidi->private_data;
594
595 dbg_hid("pcmidi in trigger %d\n", up);
596
597 pm->in_triggered = up;
598 }
599
600 static const struct snd_rawmidi_ops pcmidi_in_ops = {
601 .open = pcmidi_in_open,
602 .close = pcmidi_in_close,
603 .trigger = pcmidi_in_trigger
604 };
605
pcmidi_snd_initialise(struct pcmidi_snd * pm)606 static int pcmidi_snd_initialise(struct pcmidi_snd *pm)
607 {
608 static int dev;
609 struct snd_card *card;
610 struct snd_rawmidi *rwmidi;
611 int err;
612
613 static struct snd_device_ops ops = {
614 .dev_free = pcmidi_snd_free,
615 };
616
617 if (pm->ifnum != 1)
618 return 0; /* only set up midi device ONCE for interace 1 */
619
620 if (dev >= SNDRV_CARDS)
621 return -ENODEV;
622
623 if (!enable[dev]) {
624 dev++;
625 return -ENOENT;
626 }
627
628 /* Setup sound card */
629
630 err = snd_card_new(&pm->pk->hdev->dev, index[dev], id[dev],
631 THIS_MODULE, 0, &card);
632 if (err < 0) {
633 pk_error("failed to create pc-midi sound card\n");
634 err = -ENOMEM;
635 goto fail;
636 }
637 pm->card = card;
638
639 /* Setup sound device */
640 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, pm, &ops);
641 if (err < 0) {
642 pk_error("failed to create pc-midi sound device: error %d\n",
643 err);
644 goto fail;
645 }
646
647 strncpy(card->driver, shortname, sizeof(card->driver));
648 strncpy(card->shortname, shortname, sizeof(card->shortname));
649 strncpy(card->longname, longname, sizeof(card->longname));
650
651 /* Set up rawmidi */
652 err = snd_rawmidi_new(card, card->shortname, 0,
653 0, 1, &rwmidi);
654 if (err < 0) {
655 pk_error("failed to create pc-midi rawmidi device: error %d\n",
656 err);
657 goto fail;
658 }
659 pm->rwmidi = rwmidi;
660 strncpy(rwmidi->name, card->shortname, sizeof(rwmidi->name));
661 rwmidi->info_flags = SNDRV_RAWMIDI_INFO_INPUT;
662 rwmidi->private_data = pm;
663
664 snd_rawmidi_set_ops(rwmidi, SNDRV_RAWMIDI_STREAM_INPUT,
665 &pcmidi_in_ops);
666
667 /* create sysfs variables */
668 err = device_create_file(&pm->pk->hdev->dev,
669 sysfs_device_attr_channel);
670 if (err < 0) {
671 pk_error("failed to create sysfs attribute channel: error %d\n",
672 err);
673 goto fail;
674 }
675
676 err = device_create_file(&pm->pk->hdev->dev,
677 sysfs_device_attr_sustain);
678 if (err < 0) {
679 pk_error("failed to create sysfs attribute sustain: error %d\n",
680 err);
681 goto fail_attr_sustain;
682 }
683
684 err = device_create_file(&pm->pk->hdev->dev,
685 sysfs_device_attr_octave);
686 if (err < 0) {
687 pk_error("failed to create sysfs attribute octave: error %d\n",
688 err);
689 goto fail_attr_octave;
690 }
691
692 spin_lock_init(&pm->rawmidi_in_lock);
693
694 init_sustain_timers(pm);
695 err = pcmidi_set_operational(pm);
696 if (err < 0) {
697 pk_error("failed to find output report\n");
698 goto fail_register;
699 }
700
701 /* register it */
702 err = snd_card_register(card);
703 if (err < 0) {
704 pk_error("failed to register pc-midi sound card: error %d\n",
705 err);
706 goto fail_register;
707 }
708
709 dbg_hid("pcmidi_snd_initialise finished ok\n");
710 return 0;
711
712 fail_register:
713 stop_sustain_timers(pm);
714 device_remove_file(&pm->pk->hdev->dev, sysfs_device_attr_octave);
715 fail_attr_octave:
716 device_remove_file(&pm->pk->hdev->dev, sysfs_device_attr_sustain);
717 fail_attr_sustain:
718 device_remove_file(&pm->pk->hdev->dev, sysfs_device_attr_channel);
719 fail:
720 if (pm->card) {
721 snd_card_free(pm->card);
722 pm->card = NULL;
723 }
724 return err;
725 }
726
pcmidi_snd_terminate(struct pcmidi_snd * pm)727 static int pcmidi_snd_terminate(struct pcmidi_snd *pm)
728 {
729 if (pm->card) {
730 stop_sustain_timers(pm);
731
732 device_remove_file(&pm->pk->hdev->dev,
733 sysfs_device_attr_channel);
734 device_remove_file(&pm->pk->hdev->dev,
735 sysfs_device_attr_sustain);
736 device_remove_file(&pm->pk->hdev->dev,
737 sysfs_device_attr_octave);
738
739 snd_card_disconnect(pm->card);
740 snd_card_free_when_closed(pm->card);
741 }
742
743 return 0;
744 }
745
746 /*
747 * PC-MIDI report descriptor for report id is wrong.
748 */
pk_report_fixup(struct hid_device * hdev,__u8 * rdesc,unsigned int * rsize)749 static __u8 *pk_report_fixup(struct hid_device *hdev, __u8 *rdesc,
750 unsigned int *rsize)
751 {
752 if (*rsize == 178 &&
753 rdesc[111] == 0x06 && rdesc[112] == 0x00 &&
754 rdesc[113] == 0xff) {
755 hid_info(hdev,
756 "fixing up pc-midi keyboard report descriptor\n");
757
758 rdesc[144] = 0x18; /* report 4: was 0x10 report count */
759 }
760 return rdesc;
761 }
762
pk_input_mapping(struct hid_device * hdev,struct hid_input * hi,struct hid_field * field,struct hid_usage * usage,unsigned long ** bit,int * max)763 static int pk_input_mapping(struct hid_device *hdev, struct hid_input *hi,
764 struct hid_field *field, struct hid_usage *usage,
765 unsigned long **bit, int *max)
766 {
767 struct pk_device *pk = hid_get_drvdata(hdev);
768 struct pcmidi_snd *pm;
769
770 pm = pk->pm;
771
772 if (HID_UP_MSVENDOR == (usage->hid & HID_USAGE_PAGE) &&
773 1 == pm->ifnum) {
774 pcmidi_setup_extra_keys(pm, hi->input);
775 return 0;
776 }
777
778 return 0;
779 }
780
781
pk_raw_event(struct hid_device * hdev,struct hid_report * report,u8 * data,int size)782 static int pk_raw_event(struct hid_device *hdev, struct hid_report *report,
783 u8 *data, int size)
784 {
785 struct pk_device *pk = hid_get_drvdata(hdev);
786 int ret = 0;
787
788 if (1 == pk->pm->ifnum) {
789 if (report->id == data[0])
790 switch (report->id) {
791 case 0x01: /* midi keys (qwerty)*/
792 case 0x03: /* midi keyboard (musical)*/
793 case 0x04: /* extra/midi keys (qwerty)*/
794 ret = pcmidi_handle_report(pk->pm,
795 report->id, data, size);
796 break;
797 }
798 }
799
800 return ret;
801 }
802
pk_probe(struct hid_device * hdev,const struct hid_device_id * id)803 static int pk_probe(struct hid_device *hdev, const struct hid_device_id *id)
804 {
805 int ret;
806 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
807 unsigned short ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
808 unsigned long quirks = id->driver_data;
809 struct pk_device *pk;
810 struct pcmidi_snd *pm = NULL;
811
812 pk = kzalloc(sizeof(*pk), GFP_KERNEL);
813 if (pk == NULL) {
814 hid_err(hdev, "can't alloc descriptor\n");
815 return -ENOMEM;
816 }
817
818 pk->hdev = hdev;
819
820 pm = kzalloc(sizeof(*pm), GFP_KERNEL);
821 if (pm == NULL) {
822 hid_err(hdev, "can't alloc descriptor\n");
823 ret = -ENOMEM;
824 goto err_free_pk;
825 }
826
827 pm->pk = pk;
828 pk->pm = pm;
829 pm->ifnum = ifnum;
830
831 hid_set_drvdata(hdev, pk);
832
833 ret = hid_parse(hdev);
834 if (ret) {
835 hid_err(hdev, "hid parse failed\n");
836 goto err_free;
837 }
838
839 if (quirks & PK_QUIRK_NOGET) { /* hid_parse cleared all the quirks */
840 hdev->quirks |= HID_QUIRK_NOGET;
841 }
842
843 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
844 if (ret) {
845 hid_err(hdev, "hw start failed\n");
846 goto err_free;
847 }
848
849 ret = pcmidi_snd_initialise(pm);
850 if (ret < 0)
851 goto err_stop;
852
853 return 0;
854 err_stop:
855 hid_hw_stop(hdev);
856 err_free:
857 kfree(pm);
858 err_free_pk:
859 kfree(pk);
860
861 return ret;
862 }
863
pk_remove(struct hid_device * hdev)864 static void pk_remove(struct hid_device *hdev)
865 {
866 struct pk_device *pk = hid_get_drvdata(hdev);
867 struct pcmidi_snd *pm;
868
869 pm = pk->pm;
870 if (pm) {
871 pcmidi_snd_terminate(pm);
872 kfree(pm);
873 }
874
875 hid_hw_stop(hdev);
876
877 kfree(pk);
878 }
879
880 static const struct hid_device_id pk_devices[] = {
881 {HID_USB_DEVICE(USB_VENDOR_ID_CREATIVELABS,
882 USB_DEVICE_ID_PRODIKEYS_PCMIDI),
883 .driver_data = PK_QUIRK_NOGET},
884 { }
885 };
886 MODULE_DEVICE_TABLE(hid, pk_devices);
887
888 static struct hid_driver pk_driver = {
889 .name = "prodikeys",
890 .id_table = pk_devices,
891 .report_fixup = pk_report_fixup,
892 .input_mapping = pk_input_mapping,
893 .raw_event = pk_raw_event,
894 .probe = pk_probe,
895 .remove = pk_remove,
896 };
897 module_hid_driver(pk_driver);
898
899 MODULE_LICENSE("GPL");
900