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![Colin Ian King](/assets/img/avatar_default.png)
Don't populate the array keys on the stack but instead make it static const. Makes the object code smaller by 166 bytes. Before: text data bss dec hex filename 18931 5872 480 25283 62c3 drivers/hid/hid-prodikeys.o After: text data bss dec hex filename 18669 5968 480 25117 621d drivers/hid/hid-prodikeys.o (gcc version 9.2.1, amd64) Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
894 lines
20 KiB
C
894 lines
20 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* HID driver for the Prodikeys PC-MIDI Keyboard
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* providing midi & extra multimedia keys functionality
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*
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* Copyright (c) 2009 Don Prince <dhprince.devel@yahoo.co.uk>
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*
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* Controls for Octave Shift Up/Down, Channel, and
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* Sustain Duration available via sysfs.
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*/
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/*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/device.h>
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#include <linux/module.h>
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#include <linux/usb.h>
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#include <linux/mutex.h>
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#include <linux/hid.h>
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#include <sound/core.h>
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#include <sound/initval.h>
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#include <sound/rawmidi.h>
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#include "hid-ids.h"
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#define pk_debug(format, arg...) \
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pr_debug("hid-prodikeys: " format "\n" , ## arg)
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#define pk_error(format, arg...) \
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pr_err("hid-prodikeys: " format "\n" , ## arg)
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struct pcmidi_snd;
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struct pk_device {
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unsigned long quirks;
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struct hid_device *hdev;
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struct pcmidi_snd *pm; /* pcmidi device context */
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};
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struct pcmidi_sustain {
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unsigned long in_use;
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struct pcmidi_snd *pm;
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struct timer_list timer;
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unsigned char status;
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unsigned char note;
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unsigned char velocity;
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};
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#define PCMIDI_SUSTAINED_MAX 32
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struct pcmidi_snd {
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struct pk_device *pk;
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unsigned short ifnum;
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struct hid_report *pcmidi_report6;
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struct input_dev *input_ep82;
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unsigned short midi_mode;
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unsigned short midi_sustain_mode;
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unsigned short midi_sustain;
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unsigned short midi_channel;
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short midi_octave;
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struct pcmidi_sustain sustained_notes[PCMIDI_SUSTAINED_MAX];
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unsigned short fn_state;
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unsigned short last_key[24];
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spinlock_t rawmidi_in_lock;
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struct snd_card *card;
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struct snd_rawmidi *rwmidi;
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struct snd_rawmidi_substream *in_substream;
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struct snd_rawmidi_substream *out_substream;
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unsigned long in_triggered;
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unsigned long out_active;
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};
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#define PK_QUIRK_NOGET 0x00010000
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#define PCMIDI_MIDDLE_C 60
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#define PCMIDI_CHANNEL_MIN 0
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#define PCMIDI_CHANNEL_MAX 15
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#define PCMIDI_OCTAVE_MIN (-2)
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#define PCMIDI_OCTAVE_MAX 2
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#define PCMIDI_SUSTAIN_MIN 0
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#define PCMIDI_SUSTAIN_MAX 5000
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static const char shortname[] = "PC-MIDI";
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static const char longname[] = "Prodikeys PC-MIDI Keyboard";
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static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
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static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
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static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
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module_param_array(index, int, NULL, 0444);
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module_param_array(id, charp, NULL, 0444);
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module_param_array(enable, bool, NULL, 0444);
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MODULE_PARM_DESC(index, "Index value for the PC-MIDI virtual audio driver");
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MODULE_PARM_DESC(id, "ID string for the PC-MIDI virtual audio driver");
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MODULE_PARM_DESC(enable, "Enable for the PC-MIDI virtual audio driver");
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/* Output routine for the sysfs channel file */
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static ssize_t show_channel(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct hid_device *hdev = to_hid_device(dev);
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struct pk_device *pk = hid_get_drvdata(hdev);
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dbg_hid("pcmidi sysfs read channel=%u\n", pk->pm->midi_channel);
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return sprintf(buf, "%u (min:%u, max:%u)\n", pk->pm->midi_channel,
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PCMIDI_CHANNEL_MIN, PCMIDI_CHANNEL_MAX);
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}
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/* Input routine for the sysfs channel file */
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static ssize_t store_channel(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count)
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{
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struct hid_device *hdev = to_hid_device(dev);
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struct pk_device *pk = hid_get_drvdata(hdev);
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unsigned channel = 0;
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if (sscanf(buf, "%u", &channel) > 0 && channel <= PCMIDI_CHANNEL_MAX) {
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dbg_hid("pcmidi sysfs write channel=%u\n", channel);
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pk->pm->midi_channel = channel;
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return strlen(buf);
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}
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return -EINVAL;
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}
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static DEVICE_ATTR(channel, S_IRUGO | S_IWUSR | S_IWGRP , show_channel,
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store_channel);
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static struct device_attribute *sysfs_device_attr_channel = {
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&dev_attr_channel,
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};
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/* Output routine for the sysfs sustain file */
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static ssize_t show_sustain(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct hid_device *hdev = to_hid_device(dev);
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struct pk_device *pk = hid_get_drvdata(hdev);
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dbg_hid("pcmidi sysfs read sustain=%u\n", pk->pm->midi_sustain);
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return sprintf(buf, "%u (off:%u, max:%u (ms))\n", pk->pm->midi_sustain,
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PCMIDI_SUSTAIN_MIN, PCMIDI_SUSTAIN_MAX);
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}
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/* Input routine for the sysfs sustain file */
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static ssize_t store_sustain(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count)
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{
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struct hid_device *hdev = to_hid_device(dev);
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struct pk_device *pk = hid_get_drvdata(hdev);
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unsigned sustain = 0;
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if (sscanf(buf, "%u", &sustain) > 0 && sustain <= PCMIDI_SUSTAIN_MAX) {
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dbg_hid("pcmidi sysfs write sustain=%u\n", sustain);
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pk->pm->midi_sustain = sustain;
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pk->pm->midi_sustain_mode =
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(0 == sustain || !pk->pm->midi_mode) ? 0 : 1;
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return strlen(buf);
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}
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return -EINVAL;
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}
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static DEVICE_ATTR(sustain, S_IRUGO | S_IWUSR | S_IWGRP, show_sustain,
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store_sustain);
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static struct device_attribute *sysfs_device_attr_sustain = {
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&dev_attr_sustain,
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};
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/* Output routine for the sysfs octave file */
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static ssize_t show_octave(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct hid_device *hdev = to_hid_device(dev);
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struct pk_device *pk = hid_get_drvdata(hdev);
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dbg_hid("pcmidi sysfs read octave=%d\n", pk->pm->midi_octave);
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return sprintf(buf, "%d (min:%d, max:%d)\n", pk->pm->midi_octave,
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PCMIDI_OCTAVE_MIN, PCMIDI_OCTAVE_MAX);
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}
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/* Input routine for the sysfs octave file */
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static ssize_t store_octave(struct device *dev,
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struct device_attribute *attr, const char *buf, size_t count)
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{
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struct hid_device *hdev = to_hid_device(dev);
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struct pk_device *pk = hid_get_drvdata(hdev);
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int octave = 0;
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if (sscanf(buf, "%d", &octave) > 0 &&
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octave >= PCMIDI_OCTAVE_MIN && octave <= PCMIDI_OCTAVE_MAX) {
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dbg_hid("pcmidi sysfs write octave=%d\n", octave);
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pk->pm->midi_octave = octave;
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return strlen(buf);
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}
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return -EINVAL;
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}
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static DEVICE_ATTR(octave, S_IRUGO | S_IWUSR | S_IWGRP, show_octave,
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store_octave);
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static struct device_attribute *sysfs_device_attr_octave = {
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&dev_attr_octave,
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};
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static void pcmidi_send_note(struct pcmidi_snd *pm,
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unsigned char status, unsigned char note, unsigned char velocity)
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{
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unsigned long flags;
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unsigned char buffer[3];
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buffer[0] = status;
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buffer[1] = note;
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buffer[2] = velocity;
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spin_lock_irqsave(&pm->rawmidi_in_lock, flags);
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if (!pm->in_substream)
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goto drop_note;
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if (!test_bit(pm->in_substream->number, &pm->in_triggered))
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goto drop_note;
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snd_rawmidi_receive(pm->in_substream, buffer, 3);
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drop_note:
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spin_unlock_irqrestore(&pm->rawmidi_in_lock, flags);
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return;
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}
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static void pcmidi_sustained_note_release(struct timer_list *t)
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{
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struct pcmidi_sustain *pms = from_timer(pms, t, timer);
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pcmidi_send_note(pms->pm, pms->status, pms->note, pms->velocity);
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pms->in_use = 0;
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}
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static void init_sustain_timers(struct pcmidi_snd *pm)
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{
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struct pcmidi_sustain *pms;
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unsigned i;
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for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
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pms = &pm->sustained_notes[i];
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pms->in_use = 0;
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pms->pm = pm;
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timer_setup(&pms->timer, pcmidi_sustained_note_release, 0);
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}
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}
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static void stop_sustain_timers(struct pcmidi_snd *pm)
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{
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struct pcmidi_sustain *pms;
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unsigned i;
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for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
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pms = &pm->sustained_notes[i];
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pms->in_use = 1;
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del_timer_sync(&pms->timer);
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}
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}
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static int pcmidi_get_output_report(struct pcmidi_snd *pm)
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{
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struct hid_device *hdev = pm->pk->hdev;
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struct hid_report *report;
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list_for_each_entry(report,
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&hdev->report_enum[HID_OUTPUT_REPORT].report_list, list) {
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if (!(6 == report->id))
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continue;
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if (report->maxfield < 1) {
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hid_err(hdev, "output report is empty\n");
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break;
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}
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if (report->field[0]->report_count != 2) {
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hid_err(hdev, "field count too low\n");
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break;
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}
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pm->pcmidi_report6 = report;
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return 0;
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}
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/* should never get here */
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return -ENODEV;
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}
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static void pcmidi_submit_output_report(struct pcmidi_snd *pm, int state)
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{
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struct hid_device *hdev = pm->pk->hdev;
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struct hid_report *report = pm->pcmidi_report6;
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report->field[0]->value[0] = 0x01;
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report->field[0]->value[1] = state;
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hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
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}
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static int pcmidi_handle_report1(struct pcmidi_snd *pm, u8 *data)
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{
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u32 bit_mask;
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bit_mask = data[1];
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bit_mask = (bit_mask << 8) | data[2];
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bit_mask = (bit_mask << 8) | data[3];
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dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
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/*KEY_MAIL or octave down*/
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if (pm->midi_mode && bit_mask == 0x004000) {
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/* octave down */
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pm->midi_octave--;
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if (pm->midi_octave < -2)
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pm->midi_octave = -2;
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dbg_hid("pcmidi mode: %d octave: %d\n",
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pm->midi_mode, pm->midi_octave);
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return 1;
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}
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/*KEY_WWW or sustain*/
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else if (pm->midi_mode && bit_mask == 0x000004) {
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/* sustain on/off*/
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pm->midi_sustain_mode ^= 0x1;
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return 1;
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}
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return 0; /* continue key processing */
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}
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static int pcmidi_handle_report3(struct pcmidi_snd *pm, u8 *data, int size)
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{
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struct pcmidi_sustain *pms;
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unsigned i, j;
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unsigned char status, note, velocity;
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unsigned num_notes = (size-1)/2;
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for (j = 0; j < num_notes; j++) {
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note = data[j*2+1];
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velocity = data[j*2+2];
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if (note < 0x81) { /* note on */
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status = 128 + 16 + pm->midi_channel; /* 1001nnnn */
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note = note - 0x54 + PCMIDI_MIDDLE_C +
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(pm->midi_octave * 12);
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if (0 == velocity)
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velocity = 1; /* force note on */
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} else { /* note off */
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status = 128 + pm->midi_channel; /* 1000nnnn */
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note = note - 0x94 + PCMIDI_MIDDLE_C +
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(pm->midi_octave*12);
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if (pm->midi_sustain_mode) {
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for (i = 0; i < PCMIDI_SUSTAINED_MAX; i++) {
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pms = &pm->sustained_notes[i];
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if (!pms->in_use) {
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pms->status = status;
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pms->note = note;
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pms->velocity = velocity;
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pms->in_use = 1;
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mod_timer(&pms->timer,
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jiffies +
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msecs_to_jiffies(pm->midi_sustain));
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return 1;
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}
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}
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}
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}
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pcmidi_send_note(pm, status, note, velocity);
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}
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return 1;
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}
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static int pcmidi_handle_report4(struct pcmidi_snd *pm, u8 *data)
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{
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unsigned key;
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u32 bit_mask;
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u32 bit_index;
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bit_mask = data[1];
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bit_mask = (bit_mask << 8) | data[2];
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bit_mask = (bit_mask << 8) | data[3];
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/* break keys */
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for (bit_index = 0; bit_index < 24; bit_index++) {
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if (!((0x01 << bit_index) & bit_mask)) {
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input_event(pm->input_ep82, EV_KEY,
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pm->last_key[bit_index], 0);
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pm->last_key[bit_index] = 0;
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}
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}
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/* make keys */
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for (bit_index = 0; bit_index < 24; bit_index++) {
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key = 0;
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switch ((0x01 << bit_index) & bit_mask) {
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case 0x000010: /* Fn lock*/
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pm->fn_state ^= 0x000010;
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if (pm->fn_state)
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pcmidi_submit_output_report(pm, 0xc5);
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else
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pcmidi_submit_output_report(pm, 0xc6);
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continue;
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case 0x020000: /* midi launcher..send a key (qwerty) or not? */
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pcmidi_submit_output_report(pm, 0xc1);
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pm->midi_mode ^= 0x01;
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dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
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continue;
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case 0x100000: /* KEY_MESSENGER or octave up */
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dbg_hid("pcmidi mode: %d\n", pm->midi_mode);
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if (pm->midi_mode) {
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pm->midi_octave++;
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if (pm->midi_octave > 2)
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pm->midi_octave = 2;
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dbg_hid("pcmidi mode: %d octave: %d\n",
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pm->midi_mode, pm->midi_octave);
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continue;
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} else
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key = KEY_MESSENGER;
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break;
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case 0x400000:
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key = KEY_CALENDAR;
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break;
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case 0x080000:
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key = KEY_ADDRESSBOOK;
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break;
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case 0x040000:
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key = KEY_DOCUMENTS;
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break;
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case 0x800000:
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key = KEY_WORDPROCESSOR;
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break;
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case 0x200000:
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key = KEY_SPREADSHEET;
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break;
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case 0x010000:
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key = KEY_COFFEE;
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break;
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case 0x000100:
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key = KEY_HELP;
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break;
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case 0x000200:
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key = KEY_SEND;
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break;
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case 0x000400:
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key = KEY_REPLY;
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break;
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case 0x000800:
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key = KEY_FORWARDMAIL;
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break;
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case 0x001000:
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key = KEY_NEW;
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break;
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case 0x002000:
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key = KEY_OPEN;
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break;
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case 0x004000:
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key = KEY_CLOSE;
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break;
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case 0x008000:
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key = KEY_SAVE;
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break;
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case 0x000001:
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key = KEY_UNDO;
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break;
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case 0x000002:
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key = KEY_REDO;
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break;
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case 0x000004:
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key = KEY_SPELLCHECK;
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break;
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case 0x000008:
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key = KEY_PRINT;
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break;
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}
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if (key) {
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input_event(pm->input_ep82, EV_KEY, key, 1);
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pm->last_key[bit_index] = key;
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}
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}
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return 1;
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}
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|
|
static 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;
|
|
}
|
|
|
|
static 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
|
|
*/
|
|
static const 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
|
|
};
|
|
|
|
const 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)
|
|
{
|
|
int rc;
|
|
|
|
if (pm->ifnum != 1)
|
|
return 0; /* only set up ONCE for interace 1 */
|
|
|
|
rc = pcmidi_get_output_report(pm);
|
|
if (rc < 0)
|
|
return rc;
|
|
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 const struct snd_rawmidi_ops pcmidi_in_ops = {
|
|
.open = pcmidi_in_open,
|
|
.close = pcmidi_in_close,
|
|
.trigger = pcmidi_in_trigger
|
|
};
|
|
|
|
static 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_new(&pm->pk->hdev->dev, 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);
|
|
|
|
/* 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);
|
|
err = pcmidi_set_operational(pm);
|
|
if (err < 0) {
|
|
pk_error("failed to find output report\n");
|
|
goto fail_register;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
static 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 = 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 = 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_pk;
|
|
}
|
|
|
|
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:
|
|
kfree(pm);
|
|
err_free_pk:
|
|
kfree(pk);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void pk_remove(struct hid_device *hdev)
|
|
{
|
|
struct pk_device *pk = 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,
|
|
};
|
|
module_hid_driver(pk_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|