Merge branch 'acpica' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux...
[pandora-kernel.git] / drivers / hid / hid-prodikeys.c
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 "usbhid/usbhid.h"
30 #include "hid-ids.h"
31
32
33 #define pk_debug(format, arg...) \
34         pr_debug("hid-prodikeys: " format "\n" , ## arg)
35 #define pk_error(format, arg...) \
36         pr_err("hid-prodikeys: " format "\n" , ## arg)
37
38 struct pcmidi_snd;
39
40 struct pk_device {
41         unsigned long           quirks;
42
43         struct hid_device       *hdev;
44         struct pcmidi_snd       *pm; /* pcmidi device context */
45 };
46
47 struct pcmidi_snd;
48
49 struct pcmidi_sustain {
50         unsigned long           in_use;
51         struct pcmidi_snd       *pm;
52         struct timer_list       timer;
53         unsigned char           status;
54         unsigned char           note;
55         unsigned char           velocity;
56 };
57
58 #define PCMIDI_SUSTAINED_MAX    32
59 struct pcmidi_snd {
60         struct pk_device                *pk;
61         unsigned short                  ifnum;
62         struct hid_report               *pcmidi_report6;
63         struct input_dev                *input_ep82;
64         unsigned short                  midi_mode;
65         unsigned short                  midi_sustain_mode;
66         unsigned short                  midi_sustain;
67         unsigned short                  midi_channel;
68         short                           midi_octave;
69         struct pcmidi_sustain           sustained_notes[PCMIDI_SUSTAINED_MAX];
70         unsigned short                  fn_state;
71         unsigned short                  last_key[24];
72         spinlock_t                      rawmidi_in_lock;
73         struct snd_card                 *card;
74         struct snd_rawmidi              *rwmidi;
75         struct snd_rawmidi_substream    *in_substream;
76         struct snd_rawmidi_substream    *out_substream;
77         unsigned long                   in_triggered;
78         unsigned long                   out_active;
79 };
80
81 #define PK_QUIRK_NOGET  0x00010000
82 #define PCMIDI_MIDDLE_C 60
83 #define PCMIDI_CHANNEL_MIN 0
84 #define PCMIDI_CHANNEL_MAX 15
85 #define PCMIDI_OCTAVE_MIN (-2)
86 #define PCMIDI_OCTAVE_MAX 2
87 #define PCMIDI_SUSTAIN_MIN 0
88 #define PCMIDI_SUSTAIN_MAX 5000
89
90 static const char shortname[] = "PC-MIDI";
91 static const char longname[] = "Prodikeys PC-MIDI Keyboard";
92
93 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
94 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
95 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
96
97 module_param_array(index, int, NULL, 0444);
98 module_param_array(id, charp, NULL, 0444);
99 module_param_array(enable, bool, NULL, 0444);
100 MODULE_PARM_DESC(index, "Index value for the PC-MIDI virtual audio driver");
101 MODULE_PARM_DESC(id, "ID string for the PC-MIDI virtual audio driver");
102 MODULE_PARM_DESC(enable, "Enable for the PC-MIDI virtual audio driver");
103
104
105 /* Output routine for the sysfs channel file */
106 static ssize_t show_channel(struct device *dev,
107         struct device_attribute *attr, char *buf)
108 {
109         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
110         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
111
112         dbg_hid("pcmidi sysfs read channel=%u\n", pk->pm->midi_channel);
113
114         return sprintf(buf, "%u (min:%u, max:%u)\n", pk->pm->midi_channel,
115                 PCMIDI_CHANNEL_MIN, PCMIDI_CHANNEL_MAX);
116 }
117
118 /* Input routine for the sysfs channel file */
119 static ssize_t store_channel(struct device *dev,
120         struct device_attribute *attr, const char *buf, size_t count)
121 {
122         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
123         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
124
125         unsigned channel = 0;
126
127         if (sscanf(buf, "%u", &channel) > 0 && channel <= PCMIDI_CHANNEL_MAX) {
128                 dbg_hid("pcmidi sysfs write channel=%u\n", channel);
129                 pk->pm->midi_channel = channel;
130                 return strlen(buf);
131         }
132         return -EINVAL;
133 }
134
135 static DEVICE_ATTR(channel, S_IRUGO | S_IWUSR | S_IWGRP , show_channel,
136                 store_channel);
137
138 static struct device_attribute *sysfs_device_attr_channel = {
139                 &dev_attr_channel,
140                 };
141
142 /* Output routine for the sysfs sustain file */
143 static ssize_t show_sustain(struct device *dev,
144  struct device_attribute *attr, char *buf)
145 {
146         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
147         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
148
149         dbg_hid("pcmidi sysfs read sustain=%u\n", pk->pm->midi_sustain);
150
151         return sprintf(buf, "%u (off:%u, max:%u (ms))\n", pk->pm->midi_sustain,
152                 PCMIDI_SUSTAIN_MIN, PCMIDI_SUSTAIN_MAX);
153 }
154
155 /* Input routine for the sysfs sustain file */
156 static ssize_t store_sustain(struct device *dev,
157         struct device_attribute *attr, const char *buf, size_t count)
158 {
159         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
160         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
161
162         unsigned sustain = 0;
163
164         if (sscanf(buf, "%u", &sustain) > 0 && sustain <= PCMIDI_SUSTAIN_MAX) {
165                 dbg_hid("pcmidi sysfs write sustain=%u\n", sustain);
166                 pk->pm->midi_sustain = sustain;
167                 pk->pm->midi_sustain_mode =
168                         (0 == sustain || !pk->pm->midi_mode) ? 0 : 1;
169                 return strlen(buf);
170         }
171         return -EINVAL;
172 }
173
174 static DEVICE_ATTR(sustain, S_IRUGO | S_IWUSR | S_IWGRP, show_sustain,
175                 store_sustain);
176
177 static struct device_attribute *sysfs_device_attr_sustain = {
178                 &dev_attr_sustain,
179                 };
180
181 /* Output routine for the sysfs octave file */
182 static ssize_t show_octave(struct device *dev,
183         struct device_attribute *attr, char *buf)
184 {
185         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
186         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
187
188         dbg_hid("pcmidi sysfs read octave=%d\n", pk->pm->midi_octave);
189
190         return sprintf(buf, "%d (min:%d, max:%d)\n", pk->pm->midi_octave,
191                 PCMIDI_OCTAVE_MIN, PCMIDI_OCTAVE_MAX);
192 }
193
194 /* Input routine for the sysfs octave file */
195 static ssize_t store_octave(struct device *dev,
196         struct device_attribute *attr, const char *buf, size_t count)
197 {
198         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
199         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
200
201         int octave = 0;
202
203         if (sscanf(buf, "%d", &octave) > 0 &&
204                 octave >= PCMIDI_OCTAVE_MIN && octave <= PCMIDI_OCTAVE_MAX) {
205                 dbg_hid("pcmidi sysfs write octave=%d\n", octave);
206                 pk->pm->midi_octave = octave;
207                 return strlen(buf);
208         }
209         return -EINVAL;
210 }
211
212 static DEVICE_ATTR(octave, S_IRUGO | S_IWUSR | S_IWGRP, show_octave,
213                 store_octave);
214
215 static struct device_attribute *sysfs_device_attr_octave = {
216                 &dev_attr_octave,
217                 };
218
219
220 static void pcmidi_send_note(struct pcmidi_snd *pm,
221         unsigned char status, unsigned char note, unsigned char velocity)
222 {
223         unsigned long flags;
224         unsigned char buffer[3];
225
226         buffer[0] = status;
227         buffer[1] = note;
228         buffer[2] = velocity;
229
230         spin_lock_irqsave(&pm->rawmidi_in_lock, flags);
231
232         if (!pm->in_substream)
233                 goto drop_note;
234         if (!test_bit(pm->in_substream->number, &pm->in_triggered))
235                 goto drop_note;
236
237         snd_rawmidi_receive(pm->in_substream, buffer, 3);
238
239 drop_note:
240         spin_unlock_irqrestore(&pm->rawmidi_in_lock, flags);
241
242         return;
243 }
244
245 void pcmidi_sustained_note_release(unsigned long data)
246 {
247         struct pcmidi_sustain *pms = (struct pcmidi_sustain *)data;
248
249         pcmidi_send_note(pms->pm, pms->status, pms->note, pms->velocity);
250         pms->in_use = 0;
251 }
252
253 void init_sustain_timers(struct pcmidi_snd *pm)
254 {
255         struct pcmidi_sustain *pms;
256         unsigned i;
257
258         for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
259                 pms = &pm->sustained_notes[i];
260                 pms->in_use = 0;
261                 pms->pm = pm;
262                 setup_timer(&pms->timer, pcmidi_sustained_note_release,
263                         (unsigned long)pms);
264         }
265 }
266
267 void stop_sustain_timers(struct pcmidi_snd *pm)
268 {
269         struct pcmidi_sustain *pms;
270         unsigned i;
271
272         for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
273                 pms = &pm->sustained_notes[i];
274                 pms->in_use = 1;
275                 del_timer_sync(&pms->timer);
276         }
277 }
278
279 static int pcmidi_get_output_report(struct pcmidi_snd *pm)
280 {
281         struct hid_device *hdev = pm->pk->hdev;
282         struct hid_report *report;
283
284         list_for_each_entry(report,
285                 &hdev->report_enum[HID_OUTPUT_REPORT].report_list, list) {
286                 if (!(6 == report->id))
287                         continue;
288
289                 if (report->maxfield < 1) {
290                         hid_err(hdev, "output report is empty\n");
291                         break;
292                 }
293                 if (report->field[0]->report_count != 2) {
294                         hid_err(hdev, "field count too low\n");
295                         break;
296                 }
297                 pm->pcmidi_report6 = report;
298                 return 0;
299         }
300         /* should never get here */
301         return -ENODEV;
302 }
303
304 static void pcmidi_submit_output_report(struct pcmidi_snd *pm, int state)
305 {
306         struct hid_device *hdev = pm->pk->hdev;
307         struct hid_report *report = pm->pcmidi_report6;
308         report->field[0]->value[0] = 0x01;
309         report->field[0]->value[1] = state;
310
311         usbhid_submit_report(hdev, report, USB_DIR_OUT);
312 }
313
314 static int pcmidi_handle_report1(struct pcmidi_snd *pm, u8 *data)
315 {
316         u32 bit_mask;
317
318         bit_mask = data[1];
319         bit_mask = (bit_mask << 8) | data[2];
320         bit_mask = (bit_mask << 8) | data[3];
321
322         dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
323
324         /*KEY_MAIL or octave down*/
325         if (pm->midi_mode && bit_mask == 0x004000) {
326                 /* octave down */
327                 pm->midi_octave--;
328                 if (pm->midi_octave < -2)
329                         pm->midi_octave = -2;
330                 dbg_hid("pcmidi mode: %d octave: %d\n",
331                         pm->midi_mode, pm->midi_octave);
332                 return 1;
333         }
334         /*KEY_WWW or sustain*/
335         else if (pm->midi_mode && bit_mask == 0x000004) {
336                 /* sustain on/off*/
337                 pm->midi_sustain_mode ^= 0x1;
338                 return 1;
339         }
340
341         return 0; /* continue key processing */
342 }
343
344 static int pcmidi_handle_report3(struct pcmidi_snd *pm, u8 *data, int size)
345 {
346         struct pcmidi_sustain *pms;
347         unsigned i, j;
348         unsigned char status, note, velocity;
349
350         unsigned num_notes = (size-1)/2;
351         for (j = 0; j < num_notes; j++) {
352                 note = data[j*2+1];
353                 velocity = data[j*2+2];
354
355                 if (note < 0x81) { /* note on */
356                         status = 128 + 16 + pm->midi_channel; /* 1001nnnn */
357                         note = note - 0x54 + PCMIDI_MIDDLE_C +
358                                 (pm->midi_octave * 12);
359                         if (0 == velocity)
360                                 velocity = 1; /* force note on */
361                 } else { /* note off */
362                         status = 128 + pm->midi_channel; /* 1000nnnn */
363                         note = note - 0x94 + PCMIDI_MIDDLE_C +
364                                 (pm->midi_octave*12);
365
366                         if (pm->midi_sustain_mode) {
367                                 for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
368                                         pms = &pm->sustained_notes[i];
369                                         if (!pms->in_use) {
370                                                 pms->status = status;
371                                                 pms->note = note;
372                                                 pms->velocity = velocity;
373                                                 pms->in_use = 1;
374
375                                                 mod_timer(&pms->timer,
376                                                         jiffies +
377                                         msecs_to_jiffies(pm->midi_sustain));
378                                                 return 1;
379                                         }
380                                 }
381                         }
382                 }
383                 pcmidi_send_note(pm, status, note, velocity);
384         }
385
386         return 1;
387 }
388
389 static int pcmidi_handle_report4(struct pcmidi_snd *pm, u8 *data)
390 {
391         unsigned        key;
392         u32             bit_mask;
393         u32             bit_index;
394
395         bit_mask = data[1];
396         bit_mask = (bit_mask << 8) | data[2];
397         bit_mask = (bit_mask << 8) | data[3];
398
399         /* break keys */
400         for (bit_index = 0; bit_index < 24; bit_index++) {
401                 key = pm->last_key[bit_index];
402                 if (!((0x01 << bit_index) & bit_mask)) {
403                         input_event(pm->input_ep82, EV_KEY,
404                                 pm->last_key[bit_index], 0);
405                                 pm->last_key[bit_index] = 0;
406                 }
407         }
408
409         /* make keys */
410         for (bit_index = 0; bit_index < 24; bit_index++) {
411                 key = 0;
412                 switch ((0x01 << bit_index) & bit_mask) {
413                 case 0x000010: /* Fn lock*/
414                         pm->fn_state ^= 0x000010;
415                         if (pm->fn_state)
416                                 pcmidi_submit_output_report(pm, 0xc5);
417                         else
418                                 pcmidi_submit_output_report(pm, 0xc6);
419                         continue;
420                 case 0x020000: /* midi launcher..send a key (qwerty) or not? */
421                         pcmidi_submit_output_report(pm, 0xc1);
422                         pm->midi_mode ^= 0x01;
423
424                         dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
425                         continue;
426                 case 0x100000: /* KEY_MESSENGER or octave up */
427                         dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
428                         if (pm->midi_mode) {
429                                 pm->midi_octave++;
430                                 if (pm->midi_octave > 2)
431                                         pm->midi_octave = 2;
432                                 dbg_hid("pcmidi mode: %d octave: %d\n",
433                                         pm->midi_mode, pm->midi_octave);
434                             continue;
435                         } else
436                                 key = KEY_MESSENGER;
437                         break;
438                 case 0x400000:
439                         key = KEY_CALENDAR;
440                         break;
441                 case 0x080000:
442                         key = KEY_ADDRESSBOOK;
443                         break;
444                 case 0x040000:
445                         key = KEY_DOCUMENTS;
446                         break;
447                 case 0x800000:
448                         key = KEY_WORDPROCESSOR;
449                         break;
450                 case 0x200000:
451                         key = KEY_SPREADSHEET;
452                         break;
453                 case 0x010000:
454                         key = KEY_COFFEE;
455                         break;
456                 case 0x000100:
457                         key = KEY_HELP;
458                         break;
459                 case 0x000200:
460                         key = KEY_SEND;
461                         break;
462                 case 0x000400:
463                         key = KEY_REPLY;
464                         break;
465                 case 0x000800:
466                         key = KEY_FORWARDMAIL;
467                         break;
468                 case 0x001000:
469                         key = KEY_NEW;
470                         break;
471                 case 0x002000:
472                         key = KEY_OPEN;
473                         break;
474                 case 0x004000:
475                         key = KEY_CLOSE;
476                         break;
477                 case 0x008000:
478                         key = KEY_SAVE;
479                         break;
480                 case 0x000001:
481                         key = KEY_UNDO;
482                         break;
483                 case 0x000002:
484                         key = KEY_REDO;
485                         break;
486                 case 0x000004:
487                         key = KEY_SPELLCHECK;
488                         break;
489                 case 0x000008:
490                         key = KEY_PRINT;
491                         break;
492                 }
493                 if (key) {
494                         input_event(pm->input_ep82, EV_KEY, key, 1);
495                         pm->last_key[bit_index] = key;
496                 }
497         }
498
499         return 1;
500 }
501
502 int pcmidi_handle_report(
503         struct pcmidi_snd *pm, unsigned report_id, u8 *data, int size)
504 {
505         int ret = 0;
506
507         switch (report_id) {
508         case 0x01: /* midi keys (qwerty)*/
509                 ret = pcmidi_handle_report1(pm, data);
510                 break;
511         case 0x03: /* midi keyboard (musical)*/
512                 ret = pcmidi_handle_report3(pm, data, size);
513                 break;
514         case 0x04: /* multimedia/midi keys (qwerty)*/
515                 ret = pcmidi_handle_report4(pm, data);
516                 break;
517         }
518         return ret;
519 }
520
521 void pcmidi_setup_extra_keys(struct pcmidi_snd *pm, struct input_dev *input)
522 {
523         /* reassigned functionality for N/A keys
524                 MY PICTURES =>  KEY_WORDPROCESSOR
525                 MY MUSIC=>      KEY_SPREADSHEET
526         */
527         unsigned int keys[] = {
528                 KEY_FN,
529                 KEY_MESSENGER, KEY_CALENDAR,
530                 KEY_ADDRESSBOOK, KEY_DOCUMENTS,
531                 KEY_WORDPROCESSOR,
532                 KEY_SPREADSHEET,
533                 KEY_COFFEE,
534                 KEY_HELP, KEY_SEND,
535                 KEY_REPLY, KEY_FORWARDMAIL,
536                 KEY_NEW, KEY_OPEN,
537                 KEY_CLOSE, KEY_SAVE,
538                 KEY_UNDO, KEY_REDO,
539                 KEY_SPELLCHECK, KEY_PRINT,
540                 0
541         };
542
543         unsigned int *pkeys = &keys[0];
544         unsigned short i;
545
546         if (pm->ifnum != 1)  /* only set up ONCE for interace 1 */
547                 return;
548
549         pm->input_ep82 = input;
550
551         for (i = 0; i < 24; i++)
552                 pm->last_key[i] = 0;
553
554         while (*pkeys != 0) {
555                 set_bit(*pkeys, pm->input_ep82->keybit);
556                 ++pkeys;
557         }
558 }
559
560 static int pcmidi_set_operational(struct pcmidi_snd *pm)
561 {
562         if (pm->ifnum != 1)
563                 return 0; /* only set up ONCE for interace 1 */
564
565         pcmidi_get_output_report(pm);
566         pcmidi_submit_output_report(pm, 0xc1);
567         return 0;
568 }
569
570 static int pcmidi_snd_free(struct snd_device *dev)
571 {
572         return 0;
573 }
574
575 static int pcmidi_in_open(struct snd_rawmidi_substream *substream)
576 {
577         struct pcmidi_snd *pm = substream->rmidi->private_data;
578
579         dbg_hid("pcmidi in open\n");
580         pm->in_substream = substream;
581         return 0;
582 }
583
584 static int pcmidi_in_close(struct snd_rawmidi_substream *substream)
585 {
586         dbg_hid("pcmidi in close\n");
587         return 0;
588 }
589
590 static void pcmidi_in_trigger(struct snd_rawmidi_substream *substream, int up)
591 {
592         struct pcmidi_snd *pm = substream->rmidi->private_data;
593
594         dbg_hid("pcmidi in trigger %d\n", up);
595
596         pm->in_triggered = up;
597 }
598
599 static struct snd_rawmidi_ops pcmidi_in_ops = {
600         .open = pcmidi_in_open,
601         .close = pcmidi_in_close,
602         .trigger = pcmidi_in_trigger
603 };
604
605 int pcmidi_snd_initialise(struct pcmidi_snd *pm)
606 {
607         static int dev;
608         struct snd_card *card;
609         struct snd_rawmidi *rwmidi;
610         int err;
611
612         static struct snd_device_ops ops = {
613                 .dev_free = pcmidi_snd_free,
614         };
615
616         if (pm->ifnum != 1)
617                 return 0; /* only set up midi device ONCE for interace 1 */
618
619         if (dev >= SNDRV_CARDS)
620                 return -ENODEV;
621
622         if (!enable[dev]) {
623                 dev++;
624                 return -ENOENT;
625         }
626
627         /* Setup sound card */
628
629         err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
630         if (err < 0) {
631                 pk_error("failed to create pc-midi sound card\n");
632                 err = -ENOMEM;
633                 goto fail;
634         }
635         pm->card = card;
636
637         /* Setup sound device */
638         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, pm, &ops);
639         if (err < 0) {
640                 pk_error("failed to create pc-midi sound device: error %d\n",
641                         err);
642                 goto fail;
643         }
644
645         strncpy(card->driver, shortname, sizeof(card->driver));
646         strncpy(card->shortname, shortname, sizeof(card->shortname));
647         strncpy(card->longname, longname, sizeof(card->longname));
648
649         /* Set up rawmidi */
650         err = snd_rawmidi_new(card, card->shortname, 0,
651                               0, 1, &rwmidi);
652         if (err < 0) {
653                 pk_error("failed to create pc-midi rawmidi device: error %d\n",
654                         err);
655                 goto fail;
656         }
657         pm->rwmidi = rwmidi;
658         strncpy(rwmidi->name, card->shortname, sizeof(rwmidi->name));
659         rwmidi->info_flags = SNDRV_RAWMIDI_INFO_INPUT;
660         rwmidi->private_data = pm;
661
662         snd_rawmidi_set_ops(rwmidi, SNDRV_RAWMIDI_STREAM_INPUT,
663                 &pcmidi_in_ops);
664
665         snd_card_set_dev(card, &pm->pk->hdev->dev);
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         pcmidi_set_operational(pm);
696
697         /* register it */
698         err = snd_card_register(card);
699         if (err < 0) {
700                 pk_error("failed to register pc-midi sound card: error %d\n",
701                          err);
702                          goto fail_register;
703         }
704
705         dbg_hid("pcmidi_snd_initialise finished ok\n");
706         return 0;
707
708 fail_register:
709         stop_sustain_timers(pm);
710         device_remove_file(&pm->pk->hdev->dev, sysfs_device_attr_octave);
711 fail_attr_octave:
712         device_remove_file(&pm->pk->hdev->dev, sysfs_device_attr_sustain);
713 fail_attr_sustain:
714         device_remove_file(&pm->pk->hdev->dev, sysfs_device_attr_channel);
715 fail:
716         if (pm->card) {
717                 snd_card_free(pm->card);
718                 pm->card = NULL;
719         }
720         return err;
721 }
722
723 int pcmidi_snd_terminate(struct pcmidi_snd *pm)
724 {
725         if (pm->card) {
726                 stop_sustain_timers(pm);
727
728                 device_remove_file(&pm->pk->hdev->dev,
729                         sysfs_device_attr_channel);
730                 device_remove_file(&pm->pk->hdev->dev,
731                         sysfs_device_attr_sustain);
732                 device_remove_file(&pm->pk->hdev->dev,
733                         sysfs_device_attr_octave);
734
735                 snd_card_disconnect(pm->card);
736                 snd_card_free_when_closed(pm->card);
737         }
738
739         return 0;
740 }
741
742 /*
743  * PC-MIDI report descriptor for report id is wrong.
744  */
745 static __u8 *pk_report_fixup(struct hid_device *hdev, __u8 *rdesc,
746                 unsigned int *rsize)
747 {
748         if (*rsize == 178 &&
749               rdesc[111] == 0x06 && rdesc[112] == 0x00 &&
750               rdesc[113] == 0xff) {
751                 hid_info(hdev,
752                          "fixing up pc-midi keyboard report descriptor\n");
753
754                 rdesc[144] = 0x18; /* report 4: was 0x10 report count */
755         }
756         return rdesc;
757 }
758
759 static int pk_input_mapping(struct hid_device *hdev, struct hid_input *hi,
760                 struct hid_field *field, struct hid_usage *usage,
761                 unsigned long **bit, int *max)
762 {
763         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
764         struct pcmidi_snd *pm;
765
766         pm = pk->pm;
767
768         if (HID_UP_MSVENDOR == (usage->hid & HID_USAGE_PAGE) &&
769                 1 == pm->ifnum) {
770                 pcmidi_setup_extra_keys(pm, hi->input);
771                 return 0;
772         }
773
774         return 0;
775 }
776
777
778 static int pk_raw_event(struct hid_device *hdev, struct hid_report *report,
779         u8 *data, int size)
780 {
781         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
782         int ret = 0;
783
784         if (1 == pk->pm->ifnum) {
785                 if (report->id == data[0])
786                         switch (report->id) {
787                         case 0x01: /* midi keys (qwerty)*/
788                         case 0x03: /* midi keyboard (musical)*/
789                         case 0x04: /* extra/midi keys (qwerty)*/
790                                 ret = pcmidi_handle_report(pk->pm,
791                                                 report->id, data, size);
792                                 break;
793                         }
794         }
795
796         return ret;
797 }
798
799 static int pk_probe(struct hid_device *hdev, const struct hid_device_id *id)
800 {
801         int ret;
802         struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
803         unsigned short ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
804         unsigned long quirks = id->driver_data;
805         struct pk_device *pk;
806         struct pcmidi_snd *pm = NULL;
807
808         pk = kzalloc(sizeof(*pk), GFP_KERNEL);
809         if (pk == NULL) {
810                 hid_err(hdev, "can't alloc descriptor\n");
811                 return -ENOMEM;
812         }
813
814         pk->hdev = hdev;
815
816         pm = kzalloc(sizeof(*pm), GFP_KERNEL);
817         if (pm == NULL) {
818                 hid_err(hdev, "can't alloc descriptor\n");
819                 ret = -ENOMEM;
820                 goto err_free;
821         }
822
823         pm->pk = pk;
824         pk->pm = pm;
825         pm->ifnum = ifnum;
826
827         hid_set_drvdata(hdev, pk);
828
829         ret = hid_parse(hdev);
830         if (ret) {
831                 hid_err(hdev, "hid parse failed\n");
832                 goto err_free;
833         }
834
835         if (quirks & PK_QUIRK_NOGET) { /* hid_parse cleared all the quirks */
836                 hdev->quirks |= HID_QUIRK_NOGET;
837         }
838
839         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
840         if (ret) {
841                 hid_err(hdev, "hw start failed\n");
842                 goto err_free;
843         }
844
845         ret = pcmidi_snd_initialise(pm);
846         if (ret < 0)
847                 goto err_stop;
848
849         return 0;
850 err_stop:
851         hid_hw_stop(hdev);
852 err_free:
853         if (pm != NULL)
854                 kfree(pm);
855
856         kfree(pk);
857         return ret;
858 }
859
860 static void pk_remove(struct hid_device *hdev)
861 {
862         struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
863         struct pcmidi_snd *pm;
864
865         pm = pk->pm;
866         if (pm) {
867                 pcmidi_snd_terminate(pm);
868                 kfree(pm);
869         }
870
871         hid_hw_stop(hdev);
872
873         kfree(pk);
874 }
875
876 static const struct hid_device_id pk_devices[] = {
877         {HID_USB_DEVICE(USB_VENDOR_ID_CREATIVELABS,
878                 USB_DEVICE_ID_PRODIKEYS_PCMIDI),
879             .driver_data = PK_QUIRK_NOGET},
880         { }
881 };
882 MODULE_DEVICE_TABLE(hid, pk_devices);
883
884 static struct hid_driver pk_driver = {
885         .name = "prodikeys",
886         .id_table = pk_devices,
887         .report_fixup = pk_report_fixup,
888         .input_mapping = pk_input_mapping,
889         .raw_event = pk_raw_event,
890         .probe = pk_probe,
891         .remove = pk_remove,
892 };
893
894 static int pk_init(void)
895 {
896         int ret;
897
898         ret = hid_register_driver(&pk_driver);
899         if (ret)
900                 pr_err("can't register prodikeys driver\n");
901
902         return ret;
903 }
904
905 static void pk_exit(void)
906 {
907         hid_unregister_driver(&pk_driver);
908 }
909
910 module_init(pk_init);
911 module_exit(pk_exit);
912 MODULE_LICENSE("GPL");