169 lines
3.8 KiB
C
Executable file
169 lines
3.8 KiB
C
Executable file
/*
|
|
* HID driver for CMedia CM6533 audio jack controls
|
|
*
|
|
* Copyright (C) 2015 Ben Chen <ben_chen@bizlinktech.com>
|
|
*
|
|
* This software is licensed under the terms of the GNU General Public
|
|
* License version 2, as published by the Free Software Foundation, and
|
|
* may be copied, distributed, and modified under those terms.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/hid.h>
|
|
#include <linux/module.h>
|
|
#include "hid-ids.h"
|
|
|
|
MODULE_AUTHOR("Ben Chen");
|
|
MODULE_DESCRIPTION("CM6533 HID jack controls");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
#define CM6533_JD_TYPE_COUNT 1
|
|
#define CM6533_JD_RAWEV_LEN 16
|
|
#define CM6533_JD_SFX_OFFSET 8
|
|
|
|
/*
|
|
*
|
|
*CM6533 audio jack HID raw events:
|
|
*
|
|
*Plug in:
|
|
*01000600 002083xx 080008c0 10000000
|
|
*about 3 seconds later...
|
|
*01000a00 002083xx 08000380 10000000
|
|
*01000600 002083xx 08000380 10000000
|
|
*
|
|
*Plug out:
|
|
*01000400 002083xx 080008c0 x0000000
|
|
*/
|
|
|
|
static const u8 ji_sfx[] = { 0x08, 0x00, 0x08, 0xc0 };
|
|
static const u8 ji_in[] = { 0x01, 0x00, 0x06, 0x00 };
|
|
static const u8 ji_out[] = { 0x01, 0x00, 0x04, 0x00 };
|
|
|
|
static int jack_switch_types[CM6533_JD_TYPE_COUNT] = {
|
|
SW_HEADPHONE_INSERT,
|
|
};
|
|
|
|
struct cmhid {
|
|
struct input_dev *input_dev;
|
|
struct hid_device *hid;
|
|
unsigned short switch_map[CM6533_JD_TYPE_COUNT];
|
|
};
|
|
|
|
static void hp_ev(struct hid_device *hid, struct cmhid *cm, int value)
|
|
{
|
|
input_report_switch(cm->input_dev, SW_HEADPHONE_INSERT, value);
|
|
input_sync(cm->input_dev);
|
|
}
|
|
|
|
static int cmhid_raw_event(struct hid_device *hid, struct hid_report *report,
|
|
u8 *data, int len)
|
|
{
|
|
struct cmhid *cm = hid_get_drvdata(hid);
|
|
|
|
if (len != CM6533_JD_RAWEV_LEN)
|
|
goto out;
|
|
if (memcmp(data+CM6533_JD_SFX_OFFSET, ji_sfx, sizeof(ji_sfx)))
|
|
goto out;
|
|
|
|
if (!memcmp(data, ji_out, sizeof(ji_out))) {
|
|
hp_ev(hid, cm, 0);
|
|
goto out;
|
|
}
|
|
if (!memcmp(data, ji_in, sizeof(ji_in))) {
|
|
hp_ev(hid, cm, 1);
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
return 0;
|
|
}
|
|
|
|
static int cmhid_input_configured(struct hid_device *hid,
|
|
struct hid_input *hidinput)
|
|
{
|
|
struct input_dev *input_dev = hidinput->input;
|
|
struct cmhid *cm = hid_get_drvdata(hid);
|
|
int i;
|
|
|
|
cm->input_dev = input_dev;
|
|
memcpy(cm->switch_map, jack_switch_types, sizeof(cm->switch_map));
|
|
input_dev->evbit[0] = BIT(EV_SW);
|
|
for (i = 0; i < CM6533_JD_TYPE_COUNT; i++)
|
|
input_set_capability(cm->input_dev,
|
|
EV_SW, jack_switch_types[i]);
|
|
return 0;
|
|
}
|
|
|
|
static int cmhid_input_mapping(struct hid_device *hid,
|
|
struct hid_input *hi, struct hid_field *field,
|
|
struct hid_usage *usage, unsigned long **bit, int *max)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
static int cmhid_probe(struct hid_device *hid, const struct hid_device_id *id)
|
|
{
|
|
int ret;
|
|
struct cmhid *cm;
|
|
|
|
cm = kzalloc(sizeof(struct cmhid), GFP_KERNEL);
|
|
if (!cm) {
|
|
ret = -ENOMEM;
|
|
goto allocfail;
|
|
}
|
|
|
|
cm->hid = hid;
|
|
|
|
hid->quirks |= HID_QUIRK_HIDINPUT_FORCE;
|
|
hid_set_drvdata(hid, cm);
|
|
|
|
ret = hid_parse(hid);
|
|
if (ret) {
|
|
hid_err(hid, "parse failed\n");
|
|
goto fail;
|
|
}
|
|
|
|
ret = hid_hw_start(hid, HID_CONNECT_DEFAULT | HID_CONNECT_HIDDEV_FORCE);
|
|
if (ret) {
|
|
hid_err(hid, "hw start failed\n");
|
|
goto fail;
|
|
}
|
|
|
|
return 0;
|
|
fail:
|
|
kfree(cm);
|
|
allocfail:
|
|
return ret;
|
|
}
|
|
|
|
static void cmhid_remove(struct hid_device *hid)
|
|
{
|
|
struct cmhid *cm = hid_get_drvdata(hid);
|
|
|
|
hid_hw_stop(hid);
|
|
kfree(cm);
|
|
}
|
|
|
|
static const struct hid_device_id cmhid_devices[] = {
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_CMEDIA, USB_DEVICE_ID_CM6533) },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(hid, cmhid_devices);
|
|
|
|
static struct hid_driver cmhid_driver = {
|
|
.name = "cm6533_jd",
|
|
.id_table = cmhid_devices,
|
|
.raw_event = cmhid_raw_event,
|
|
.input_configured = cmhid_input_configured,
|
|
.probe = cmhid_probe,
|
|
.remove = cmhid_remove,
|
|
.input_mapping = cmhid_input_mapping,
|
|
};
|
|
module_hid_driver(cmhid_driver);
|
|
|