- 根目录:
- drivers
- hid
- hid-prodikeys.c
/*
* 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.
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#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_IWUSR | S_IWGRP , 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_IWUSR | S_IWGRP, 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_IWUSR | S_IWGRP, 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) {
hid_err(hdev, "output report is empty\n");
break;
}
if (report->field[0]->report_count != 2) {
hid_err(hdev, "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 __u8 *pk_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
if (*rsize == 178 &&
rdesc[111] == 0x06 && rdesc[112] == 0x00 &&
rdesc[113] == 0xff) {
hid_info(hdev,
"fixing up pc-midi keyboard report descriptor\n");
rdesc[144] = 0x18; /* report 4: was 0x10 report count */
}
return rdesc;
}
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) {
hid_err(hdev, "can't alloc descriptor\n");
return -ENOMEM;
}
pk->hdev = hdev;
pm = kzalloc(sizeof(*pm), GFP_KERNEL);
if (pm == NULL) {
hid_err(hdev, "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) {
hid_err(hdev, "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) {
hid_err(hdev, "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)
pr_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");