--- /dev/null
+/*
+ * 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");
projects / GitHub / moto-9609 / android_kernel_motorola_exynos9610.git / commitdiff