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authorDon Prince <dhprince-devel@yahoo.co.uk>2010-05-12 15:18:59 +0200
committerJiri Kosina <jkosina@suse.cz>2010-05-12 15:18:59 +0200
commit3a370ca1dcf8c80aff7a0a21d6b0f50ca2a151e9 (patch)
treee22cf1ec95ed95255d4d1cb535e5fb892bdda25f /drivers/hid/hid-prodikeys.c
parent94b849aaf6e22ab7bf54b0d0377a882d4892396d (diff)
downloadlinux-2.6.38-lt-ux500-3a370ca1dcf8c80aff7a0a21d6b0f50ca2a151e9.tar.gz
HID: Prodikeys PC-MIDI HID Driver
A specialised HID driver for the Creative Prodikeys PC-MIDI USB Keyboard. The Prodikeys PC-MIDI is a multifunction keyboard comprising a qwerty keyboard, multimedia keys and a touch sensitive musical keyboard. The specialised HID driver adds full support for the musical keyboard and extra multimedia keys which are not currently handled by the default HID driver. The specialised HID driver interfaces with ALSA, and presents the midi keyboard as a rawmidi device. Sustain duration, octave shifting and the midi output channel can be read/written form userspace via sysfs. Signed-off-by: Don Prince <dhprince-devel@yahoo.co.uk> ALSA parts: Acked-by: Clemens Ladisch <clemens@ladisch.de> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-prodikeys.c')
-rw-r--r--drivers/hid/hid-prodikeys.c910
1 files changed, 910 insertions, 0 deletions
diff --git a/drivers/hid/hid-prodikeys.c b/drivers/hid/hid-prodikeys.c
new file mode 100644
index 00000000000..845f428b809
--- /dev/null
+++ b/drivers/hid/hid-prodikeys.c
@@ -0,0 +1,910 @@
+/*
+ * HID driver for the Prodikeys PC-MIDI Keyboard
+ * providing midi & extra multimedia keys functionality
+ *
+ * Copyright (c) 2009 Don Prince <dhprince.devel@yahoo.co.uk>
+ *
+ * Controls for Octave Shift Up/Down, Channel, and
+ * Sustain Duration available via sysfs.
+ *
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ */
+
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/usb.h>
+#include <linux/mutex.h>
+#include <linux/hid.h>
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/rawmidi.h>
+#include "usbhid/usbhid.h"
+#include "hid-ids.h"
+
+
+#define pk_debug(format, arg...) \
+ pr_debug("hid-prodikeys: " format "\n" , ## arg)
+#define pk_error(format, arg...) \
+ pr_err("hid-prodikeys: " format "\n" , ## arg)
+
+struct pcmidi_snd;
+
+struct pk_device {
+ unsigned long quirks;
+
+ struct hid_device *hdev;
+ struct pcmidi_snd *pm; /* pcmidi device context */
+};
+
+struct pcmidi_snd;
+
+struct pcmidi_sustain {
+ unsigned long in_use;
+ struct pcmidi_snd *pm;
+ struct timer_list timer;
+ unsigned char status;
+ unsigned char note;
+ unsigned char velocity;
+};
+
+#define PCMIDI_SUSTAINED_MAX 32
+struct pcmidi_snd {
+ struct pk_device *pk;
+ unsigned short ifnum;
+ struct hid_report *pcmidi_report6;
+ struct input_dev *input_ep82;
+ unsigned short midi_mode;
+ unsigned short midi_sustain_mode;
+ unsigned short midi_sustain;
+ unsigned short midi_channel;
+ short midi_octave;
+ struct pcmidi_sustain sustained_notes[PCMIDI_SUSTAINED_MAX];
+ unsigned short fn_state;
+ unsigned short last_key[24];
+ spinlock_t rawmidi_in_lock;
+ struct snd_card *card;
+ struct snd_rawmidi *rwmidi;
+ struct snd_rawmidi_substream *in_substream;
+ struct snd_rawmidi_substream *out_substream;
+ unsigned long in_triggered;
+ unsigned long out_active;
+};
+
+#define PK_QUIRK_NOGET 0x00010000
+#define PCMIDI_MIDDLE_C 60
+#define PCMIDI_CHANNEL_MIN 0
+#define PCMIDI_CHANNEL_MAX 15
+#define PCMIDI_OCTAVE_MIN (-2)
+#define PCMIDI_OCTAVE_MAX 2
+#define PCMIDI_SUSTAIN_MIN 0
+#define PCMIDI_SUSTAIN_MAX 5000
+
+static const char shortname[] = "PC-MIDI";
+static const char longname[] = "Prodikeys PC-MIDI Keyboard";
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
+static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
+
+module_param_array(index, int, NULL, 0444);
+module_param_array(id, charp, NULL, 0444);
+module_param_array(enable, bool, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for the PC-MIDI virtual audio driver");
+MODULE_PARM_DESC(id, "ID string for the PC-MIDI virtual audio driver");
+MODULE_PARM_DESC(enable, "Enable for the PC-MIDI virtual audio driver");
+
+
+/* Output routine for the sysfs channel file */
+static ssize_t show_channel(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct hid_device *hdev = container_of(dev, struct hid_device, dev);
+ struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
+
+ dbg_hid("pcmidi sysfs read channel=%u\n", pk->pm->midi_channel);
+
+ return sprintf(buf, "%u (min:%u, max:%u)\n", pk->pm->midi_channel,
+ PCMIDI_CHANNEL_MIN, PCMIDI_CHANNEL_MAX);
+}
+
+/* Input routine for the sysfs channel file */
+static ssize_t store_channel(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct hid_device *hdev = container_of(dev, struct hid_device, dev);
+ struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
+
+ unsigned channel = 0;
+
+ if (sscanf(buf, "%u", &channel) > 0 && channel <= PCMIDI_CHANNEL_MAX) {
+ dbg_hid("pcmidi sysfs write channel=%u\n", channel);
+ pk->pm->midi_channel = channel;
+ return strlen(buf);
+ }
+ return -EINVAL;
+}
+
+static DEVICE_ATTR(channel, S_IRUGO | S_IWUGO, show_channel,
+ store_channel);
+
+static struct device_attribute *sysfs_device_attr_channel = {
+ &dev_attr_channel,
+ };
+
+/* Output routine for the sysfs sustain file */
+static ssize_t show_sustain(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct hid_device *hdev = container_of(dev, struct hid_device, dev);
+ struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
+
+ dbg_hid("pcmidi sysfs read sustain=%u\n", pk->pm->midi_sustain);
+
+ return sprintf(buf, "%u (off:%u, max:%u (ms))\n", pk->pm->midi_sustain,
+ PCMIDI_SUSTAIN_MIN, PCMIDI_SUSTAIN_MAX);
+}
+
+/* Input routine for the sysfs sustain file */
+static ssize_t store_sustain(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct hid_device *hdev = container_of(dev, struct hid_device, dev);
+ struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
+
+ unsigned sustain = 0;
+
+ if (sscanf(buf, "%u", &sustain) > 0 && sustain <= PCMIDI_SUSTAIN_MAX) {
+ dbg_hid("pcmidi sysfs write sustain=%u\n", sustain);
+ pk->pm->midi_sustain = sustain;
+ pk->pm->midi_sustain_mode =
+ (0 == sustain || !pk->pm->midi_mode) ? 0 : 1;
+ return strlen(buf);
+ }
+ return -EINVAL;
+}
+
+static DEVICE_ATTR(sustain, S_IRUGO | S_IWUGO, show_sustain,
+ store_sustain);
+
+static struct device_attribute *sysfs_device_attr_sustain = {
+ &dev_attr_sustain,
+ };
+
+/* Output routine for the sysfs octave file */
+static ssize_t show_octave(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct hid_device *hdev = container_of(dev, struct hid_device, dev);
+ struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
+
+ dbg_hid("pcmidi sysfs read octave=%d\n", pk->pm->midi_octave);
+
+ return sprintf(buf, "%d (min:%d, max:%d)\n", pk->pm->midi_octave,
+ PCMIDI_OCTAVE_MIN, PCMIDI_OCTAVE_MAX);
+}
+
+/* Input routine for the sysfs octave file */
+static ssize_t store_octave(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct hid_device *hdev = container_of(dev, struct hid_device, dev);
+ struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
+
+ int octave = 0;
+
+ if (sscanf(buf, "%d", &octave) > 0 &&
+ octave >= PCMIDI_OCTAVE_MIN && octave <= PCMIDI_OCTAVE_MAX) {
+ dbg_hid("pcmidi sysfs write octave=%d\n", octave);
+ pk->pm->midi_octave = octave;
+ return strlen(buf);
+ }
+ return -EINVAL;
+}
+
+static DEVICE_ATTR(octave, S_IRUGO | S_IWUGO, show_octave,
+ store_octave);
+
+static struct device_attribute *sysfs_device_attr_octave = {
+ &dev_attr_octave,
+ };
+
+
+static void pcmidi_send_note(struct pcmidi_snd *pm,
+ unsigned char status, unsigned char note, unsigned char velocity)
+{
+ unsigned long flags;
+ unsigned char buffer[3];
+
+ buffer[0] = status;
+ buffer[1] = note;
+ buffer[2] = velocity;
+
+ spin_lock_irqsave(&pm->rawmidi_in_lock, flags);
+
+ if (!pm->in_substream)
+ goto drop_note;
+ if (!test_bit(pm->in_substream->number, &pm->in_triggered))
+ goto drop_note;
+
+ snd_rawmidi_receive(pm->in_substream, buffer, 3);
+
+drop_note:
+ spin_unlock_irqrestore(&pm->rawmidi_in_lock, flags);
+
+ return;
+}
+
+void pcmidi_sustained_note_release(unsigned long data)
+{
+ struct pcmidi_sustain *pms = (struct pcmidi_sustain *)data;
+
+ pcmidi_send_note(pms->pm, pms->status, pms->note, pms->velocity);
+ pms->in_use = 0;
+}
+
+void init_sustain_timers(struct pcmidi_snd *pm)
+{
+ struct pcmidi_sustain *pms;
+ unsigned i;
+
+ for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
+ pms = &pm->sustained_notes[i];
+ pms->in_use = 0;
+ pms->pm = pm;
+ setup_timer(&pms->timer, pcmidi_sustained_note_release,
+ (unsigned long)pms);
+ }
+}
+
+void stop_sustain_timers(struct pcmidi_snd *pm)
+{
+ struct pcmidi_sustain *pms;
+ unsigned i;
+
+ for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
+ pms = &pm->sustained_notes[i];
+ pms->in_use = 1;
+ del_timer_sync(&pms->timer);
+ }
+}
+
+static int pcmidi_get_output_report(struct pcmidi_snd *pm)
+{
+ struct hid_device *hdev = pm->pk->hdev;
+ struct hid_report *report;
+
+ list_for_each_entry(report,
+ &hdev->report_enum[HID_OUTPUT_REPORT].report_list, list) {
+ if (!(6 == report->id))
+ continue;
+
+ if (report->maxfield < 1) {
+ dev_err(&hdev->dev, "output report is empty\n");
+ break;
+ }
+ if (report->field[0]->report_count != 2) {
+ dev_err(&hdev->dev, "field count too low\n");
+ break;
+ }
+ pm->pcmidi_report6 = report;
+ return 0;
+ }
+ /* should never get here */
+ return -ENODEV;
+}
+
+static void pcmidi_submit_output_report(struct pcmidi_snd *pm, int state)
+{
+ struct hid_device *hdev = pm->pk->hdev;
+ struct hid_report *report = pm->pcmidi_report6;
+ report->field[0]->value[0] = 0x01;
+ report->field[0]->value[1] = state;
+
+ usbhid_submit_report(hdev, report, USB_DIR_OUT);
+}
+
+static int pcmidi_handle_report1(struct pcmidi_snd *pm, u8 *data)
+{
+ u32 bit_mask;
+
+ bit_mask = data[1];
+ bit_mask = (bit_mask << 8) | data[2];
+ bit_mask = (bit_mask << 8) | data[3];
+
+ dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
+
+ /*KEY_MAIL or octave down*/
+ if (pm->midi_mode && bit_mask == 0x004000) {
+ /* octave down */
+ pm->midi_octave--;
+ if (pm->midi_octave < -2)
+ pm->midi_octave = -2;
+ dbg_hid("pcmidi mode: %d octave: %d\n",
+ pm->midi_mode, pm->midi_octave);
+ return 1;
+ }
+ /*KEY_WWW or sustain*/
+ else if (pm->midi_mode && bit_mask == 0x000004) {
+ /* sustain on/off*/
+ pm->midi_sustain_mode ^= 0x1;
+ return 1;
+ }
+
+ return 0; /* continue key processing */
+}
+
+static int pcmidi_handle_report3(struct pcmidi_snd *pm, u8 *data, int size)
+{
+ struct pcmidi_sustain *pms;
+ unsigned i, j;
+ unsigned char status, note, velocity;
+
+ unsigned num_notes = (size-1)/2;
+ for (j = 0; j < num_notes; j++) {
+ note = data[j*2+1];
+ velocity = data[j*2+2];
+
+ if (note < 0x81) { /* note on */
+ status = 128 + 16 + pm->midi_channel; /* 1001nnnn */
+ note = note - 0x54 + PCMIDI_MIDDLE_C +
+ (pm->midi_octave * 12);
+ if (0 == velocity)
+ velocity = 1; /* force note on */
+ } else { /* note off */
+ status = 128 + pm->midi_channel; /* 1000nnnn */
+ note = note - 0x94 + PCMIDI_MIDDLE_C +
+ (pm->midi_octave*12);
+
+ if (pm->midi_sustain_mode) {
+ for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
+ pms = &pm->sustained_notes[i];
+ if (!pms->in_use) {
+ pms->status = status;
+ pms->note = note;
+ pms->velocity = velocity;
+ pms->in_use = 1;
+
+ mod_timer(&pms->timer,
+ jiffies +
+ msecs_to_jiffies(pm->midi_sustain));
+ return 1;
+ }
+ }
+ }
+ }
+ pcmidi_send_note(pm, status, note, velocity);
+ }
+
+ return 1;
+}
+
+static int pcmidi_handle_report4(struct pcmidi_snd *pm, u8 *data)
+{
+ unsigned key;
+ u32 bit_mask;
+ u32 bit_index;
+
+ bit_mask = data[1];
+ bit_mask = (bit_mask << 8) | data[2];
+ bit_mask = (bit_mask << 8) | data[3];
+
+ /* break keys */
+ for (bit_index = 0; bit_index < 24; bit_index++) {
+ key = pm->last_key[bit_index];
+ if (!((0x01 << bit_index) & bit_mask)) {
+ input_event(pm->input_ep82, EV_KEY,
+ pm->last_key[bit_index], 0);
+ pm->last_key[bit_index] = 0;
+ }
+ }
+
+ /* make keys */
+ for (bit_index = 0; bit_index < 24; bit_index++) {
+ key = 0;
+ switch ((0x01 << bit_index) & bit_mask) {
+ case 0x000010: /* Fn lock*/
+ pm->fn_state ^= 0x000010;
+ if (pm->fn_state)
+ pcmidi_submit_output_report(pm, 0xc5);
+ else
+ pcmidi_submit_output_report(pm, 0xc6);
+ continue;
+ case 0x020000: /* midi launcher..send a key (qwerty) or not? */
+ pcmidi_submit_output_report(pm, 0xc1);
+ pm->midi_mode ^= 0x01;
+
+ dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
+ continue;
+ case 0x100000: /* KEY_MESSENGER or octave up */
+ dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
+ if (pm->midi_mode) {
+ pm->midi_octave++;
+ if (pm->midi_octave > 2)
+ pm->midi_octave = 2;
+ dbg_hid("pcmidi mode: %d octave: %d\n",
+ pm->midi_mode, pm->midi_octave);
+ continue;
+ } else
+ key = KEY_MESSENGER;
+ break;
+ case 0x400000:
+ key = KEY_CALENDAR;
+ break;
+ case 0x080000:
+ key = KEY_ADDRESSBOOK;
+ break;
+ case 0x040000:
+ key = KEY_DOCUMENTS;
+ break;
+ case 0x800000:
+ key = KEY_WORDPROCESSOR;
+ break;
+ case 0x200000:
+ key = KEY_SPREADSHEET;
+ break;
+ case 0x010000:
+ key = KEY_COFFEE;
+ break;
+ case 0x000100:
+ key = KEY_HELP;
+ break;
+ case 0x000200:
+ key = KEY_SEND;
+ break;
+ case 0x000400:
+ key = KEY_REPLY;
+ break;
+ case 0x000800:
+ key = KEY_FORWARDMAIL;
+ break;
+ case 0x001000:
+ key = KEY_NEW;
+ break;
+ case 0x002000:
+ key = KEY_OPEN;
+ break;
+ case 0x004000:
+ key = KEY_CLOSE;
+ break;
+ case 0x008000:
+ key = KEY_SAVE;
+ break;
+ case 0x000001:
+ key = KEY_UNDO;
+ break;
+ case 0x000002:
+ key = KEY_REDO;
+ break;
+ case 0x000004:
+ key = KEY_SPELLCHECK;
+ break;
+ case 0x000008:
+ key = KEY_PRINT;
+ break;
+ }
+ if (key) {
+ input_event(pm->input_ep82, EV_KEY, key, 1);
+ pm->last_key[bit_index] = key;
+ }
+ }
+
+ return 1;
+}
+
+int pcmidi_handle_report(
+ struct pcmidi_snd *pm, unsigned report_id, u8 *data, int size)
+{
+ int ret = 0;
+
+ switch (report_id) {
+ case 0x01: /* midi keys (qwerty)*/
+ ret = pcmidi_handle_report1(pm, data);
+ break;
+ case 0x03: /* midi keyboard (musical)*/
+ ret = pcmidi_handle_report3(pm, data, size);
+ break;
+ case 0x04: /* multimedia/midi keys (qwerty)*/
+ ret = pcmidi_handle_report4(pm, data);
+ break;
+ }
+ return ret;
+}
+
+void pcmidi_setup_extra_keys(struct pcmidi_snd *pm, struct input_dev *input)
+{
+ /* reassigned functionality for N/A keys
+ MY PICTURES => KEY_WORDPROCESSOR
+ MY MUSIC=> KEY_SPREADSHEET
+ */
+ unsigned int keys[] = {
+ KEY_FN,
+ KEY_MESSENGER, KEY_CALENDAR,
+ KEY_ADDRESSBOOK, KEY_DOCUMENTS,
+ KEY_WORDPROCESSOR,
+ KEY_SPREADSHEET,
+ KEY_COFFEE,
+ KEY_HELP, KEY_SEND,
+ KEY_REPLY, KEY_FORWARDMAIL,
+ KEY_NEW, KEY_OPEN,
+ KEY_CLOSE, KEY_SAVE,
+ KEY_UNDO, KEY_REDO,
+ KEY_SPELLCHECK, KEY_PRINT,
+ 0
+ };
+
+ unsigned int *pkeys = &keys[0];
+ unsigned short i;
+
+ if (pm->ifnum != 1) /* only set up ONCE for interace 1 */
+ return;
+
+ pm->input_ep82 = input;
+
+ for (i = 0; i < 24; i++)
+ pm->last_key[i] = 0;
+
+ while (*pkeys != 0) {
+ set_bit(*pkeys, pm->input_ep82->keybit);
+ ++pkeys;
+ }
+}
+
+static int pcmidi_set_operational(struct pcmidi_snd *pm)
+{
+ if (pm->ifnum != 1)
+ return 0; /* only set up ONCE for interace 1 */
+
+ pcmidi_get_output_report(pm);
+ pcmidi_submit_output_report(pm, 0xc1);
+ return 0;
+}
+
+static int pcmidi_snd_free(struct snd_device *dev)
+{
+ return 0;
+}
+
+static int pcmidi_in_open(struct snd_rawmidi_substream *substream)
+{
+ struct pcmidi_snd *pm = substream->rmidi->private_data;
+
+ dbg_hid("pcmidi in open\n");
+ pm->in_substream = substream;
+ return 0;
+}
+
+static int pcmidi_in_close(struct snd_rawmidi_substream *substream)
+{
+ dbg_hid("pcmidi in close\n");
+ return 0;
+}
+
+static void pcmidi_in_trigger(struct snd_rawmidi_substream *substream, int up)
+{
+ struct pcmidi_snd *pm = substream->rmidi->private_data;
+
+ dbg_hid("pcmidi in trigger %d\n", up);
+
+ pm->in_triggered = up;
+}
+
+static struct snd_rawmidi_ops pcmidi_in_ops = {
+ .open = pcmidi_in_open,
+ .close = pcmidi_in_close,
+ .trigger = pcmidi_in_trigger
+};
+
+int pcmidi_snd_initialise(struct pcmidi_snd *pm)
+{
+ static int dev;
+ struct snd_card *card;
+ struct snd_rawmidi *rwmidi;
+ int err;
+
+ static struct snd_device_ops ops = {
+ .dev_free = pcmidi_snd_free,
+ };
+
+ if (pm->ifnum != 1)
+ return 0; /* only set up midi device ONCE for interace 1 */
+
+ if (dev >= SNDRV_CARDS)
+ return -ENODEV;
+
+ if (!enable[dev]) {
+ dev++;
+ return -ENOENT;
+ }
+
+ /* Setup sound card */
+
+ err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
+ if (err < 0) {
+ pk_error("failed to create pc-midi sound card\n");
+ err = -ENOMEM;
+ goto fail;
+ }
+ pm->card = card;
+
+ /* Setup sound device */
+ err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, pm, &ops);
+ if (err < 0) {
+ pk_error("failed to create pc-midi sound device: error %d\n",
+ err);
+ goto fail;
+ }
+
+ strncpy(card->driver, shortname, sizeof(card->driver));
+ strncpy(card->shortname, shortname, sizeof(card->shortname));
+ strncpy(card->longname, longname, sizeof(card->longname));
+
+ /* Set up rawmidi */
+ err = snd_rawmidi_new(card, card->shortname, 0,
+ 0, 1, &rwmidi);
+ if (err < 0) {
+ pk_error("failed to create pc-midi rawmidi device: error %d\n",
+ err);
+ goto fail;
+ }
+ pm->rwmidi = rwmidi;
+ strncpy(rwmidi->name, card->shortname, sizeof(rwmidi->name));
+ rwmidi->info_flags = SNDRV_RAWMIDI_INFO_INPUT;
+ rwmidi->private_data = pm;
+
+ snd_rawmidi_set_ops(rwmidi, SNDRV_RAWMIDI_STREAM_INPUT,
+ &pcmidi_in_ops);
+
+ snd_card_set_dev(card, &pm->pk->hdev->dev);
+
+ /* create sysfs variables */
+ err = device_create_file(&pm->pk->hdev->dev,
+ sysfs_device_attr_channel);
+ if (err < 0) {
+ pk_error("failed to create sysfs attribute channel: error %d\n",
+ err);
+ goto fail;
+ }
+
+ err = device_create_file(&pm->pk->hdev->dev,
+ sysfs_device_attr_sustain);
+ if (err < 0) {
+ pk_error("failed to create sysfs attribute sustain: error %d\n",
+ err);
+ goto fail_attr_sustain;
+ }
+
+ err = device_create_file(&pm->pk->hdev->dev,
+ sysfs_device_attr_octave);
+ if (err < 0) {
+ pk_error("failed to create sysfs attribute octave: error %d\n",
+ err);
+ goto fail_attr_octave;
+ }
+
+ spin_lock_init(&pm->rawmidi_in_lock);
+
+ init_sustain_timers(pm);
+ pcmidi_set_operational(pm);
+
+ /* register it */
+ err = snd_card_register(card);
+ if (err < 0) {
+ pk_error("failed to register pc-midi sound card: error %d\n",
+ err);
+ goto fail_register;
+ }
+
+ dbg_hid("pcmidi_snd_initialise finished ok\n");
+ return 0;
+
+fail_register:
+ stop_sustain_timers(pm);
+ device_remove_file(&pm->pk->hdev->dev, sysfs_device_attr_octave);
+fail_attr_octave:
+ device_remove_file(&pm->pk->hdev->dev, sysfs_device_attr_sustain);
+fail_attr_sustain:
+ device_remove_file(&pm->pk->hdev->dev, sysfs_device_attr_channel);
+fail:
+ if (pm->card) {
+ snd_card_free(pm->card);
+ pm->card = NULL;
+ }
+ return err;
+}
+
+int pcmidi_snd_terminate(struct pcmidi_snd *pm)
+{
+ if (pm->card) {
+ stop_sustain_timers(pm);
+
+ device_remove_file(&pm->pk->hdev->dev,
+ sysfs_device_attr_channel);
+ device_remove_file(&pm->pk->hdev->dev,
+ sysfs_device_attr_sustain);
+ device_remove_file(&pm->pk->hdev->dev,
+ sysfs_device_attr_octave);
+
+ snd_card_disconnect(pm->card);
+ snd_card_free_when_closed(pm->card);
+ }
+
+ return 0;
+}
+
+/*
+ * PC-MIDI report descriptor for report id is wrong.
+ */
+static void pk_report_fixup(struct hid_device *hdev, __u8 *rdesc,
+ unsigned int rsize)
+{
+ if (rsize == 178 &&
+ rdesc[111] == 0x06 && rdesc[112] == 0x00 &&
+ rdesc[113] == 0xff) {
+ dev_info(&hdev->dev, "fixing up pc-midi keyboard report "
+ "descriptor\n");
+
+ rdesc[144] = 0x18; /* report 4: was 0x10 report count */
+ }
+}
+
+static int pk_input_mapping(struct hid_device *hdev, struct hid_input *hi,
+ struct hid_field *field, struct hid_usage *usage,
+ unsigned long **bit, int *max)
+{
+ struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
+ struct pcmidi_snd *pm;
+
+ pm = pk->pm;
+
+ if (HID_UP_MSVENDOR == (usage->hid & HID_USAGE_PAGE) &&
+ 1 == pm->ifnum) {
+ pcmidi_setup_extra_keys(pm, hi->input);
+ return 0;
+ }
+
+ return 0;
+}
+
+
+static int pk_raw_event(struct hid_device *hdev, struct hid_report *report,
+ u8 *data, int size)
+{
+ struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
+ int ret = 0;
+
+ if (1 == pk->pm->ifnum) {
+ if (report->id == data[0])
+ switch (report->id) {
+ case 0x01: /* midi keys (qwerty)*/
+ case 0x03: /* midi keyboard (musical)*/
+ case 0x04: /* extra/midi keys (qwerty)*/
+ ret = pcmidi_handle_report(pk->pm,
+ report->id, data, size);
+ break;
+ }
+ }
+
+ return ret;
+}
+
+static int pk_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+ int ret;
+ struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
+ unsigned short ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
+ unsigned long quirks = id->driver_data;
+ struct pk_device *pk;
+ struct pcmidi_snd *pm = NULL;
+
+ pk = kzalloc(sizeof(*pk), GFP_KERNEL);
+ if (pk == NULL) {
+ dev_err(&hdev->dev, "prodikeys: can't alloc descriptor\n");
+ return -ENOMEM;
+ }
+
+ pk->hdev = hdev;
+
+ pm = kzalloc(sizeof(*pm), GFP_KERNEL);
+ if (pm == NULL) {
+ dev_err(&hdev->dev,
+ "prodikeys: can't alloc descriptor\n");
+ ret = -ENOMEM;
+ goto err_free;
+ }
+
+ pm->pk = pk;
+ pk->pm = pm;
+ pm->ifnum = ifnum;
+
+ hid_set_drvdata(hdev, pk);
+
+ ret = hid_parse(hdev);
+ if (ret) {
+ dev_err(&hdev->dev, "prodikeys: hid parse failed\n");
+ goto err_free;
+ }
+
+ if (quirks & PK_QUIRK_NOGET) { /* hid_parse cleared all the quirks */
+ hdev->quirks |= HID_QUIRK_NOGET;
+ }
+
+ ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+ if (ret) {
+ dev_err(&hdev->dev, "prodikeys: hw start failed\n");
+ goto err_free;
+ }
+
+ ret = pcmidi_snd_initialise(pm);
+ if (ret < 0)
+ goto err_stop;
+
+ return 0;
+err_stop:
+ hid_hw_stop(hdev);
+err_free:
+ if (pm != NULL)
+ kfree(pm);
+
+ kfree(pk);
+ return ret;
+}
+
+static void pk_remove(struct hid_device *hdev)
+{
+ struct pk_device *pk = (struct pk_device *)hid_get_drvdata(hdev);
+ struct pcmidi_snd *pm;
+
+ pm = pk->pm;
+ if (pm) {
+ pcmidi_snd_terminate(pm);
+ kfree(pm);
+ }
+
+ hid_hw_stop(hdev);
+
+ kfree(pk);
+}
+
+static const struct hid_device_id pk_devices[] = {
+ {HID_USB_DEVICE(USB_VENDOR_ID_CREATIVELABS,
+ USB_DEVICE_ID_PRODIKEYS_PCMIDI),
+ .driver_data = PK_QUIRK_NOGET},
+ { }
+};
+MODULE_DEVICE_TABLE(hid, pk_devices);
+
+static struct hid_driver pk_driver = {
+ .name = "prodikeys",
+ .id_table = pk_devices,
+ .report_fixup = pk_report_fixup,
+ .input_mapping = pk_input_mapping,
+ .raw_event = pk_raw_event,
+ .probe = pk_probe,
+ .remove = pk_remove,
+};
+
+static int pk_init(void)
+{
+ int ret;
+
+ ret = hid_register_driver(&pk_driver);
+ if (ret)
+ printk(KERN_ERR "can't register prodikeys driver\n");
+
+ return ret;
+}
+
+static void pk_exit(void)
+{
+ hid_unregister_driver(&pk_driver);
+}
+
+module_init(pk_init);
+module_exit(pk_exit);
+MODULE_LICENSE("GPL");