mirror of https://github.com/torvalds/linux.git
76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* HID driver for EVision devices
|
|
* For now, only ignore bogus consumer reports
|
|
* sent after the keyboard has been configured
|
|
*
|
|
* Copyright (c) 2022 Philippe Valembois
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/input.h>
|
|
#include <linux/hid.h>
|
|
#include <linux/module.h>
|
|
|
|
#include "hid-ids.h"
|
|
|
|
static int evision_input_mapping(struct hid_device *hdev, struct hid_input *hi,
|
|
struct hid_field *field, struct hid_usage *usage,
|
|
unsigned long **bit, int *max)
|
|
{
|
|
/* mapping only applies to USB_DEVICE_ID_EVISION_ICL01 */
|
|
if (hdev->product != USB_DEVICE_ID_EVISION_ICL01)
|
|
return 0;
|
|
|
|
if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
|
|
return 0;
|
|
|
|
/* Ignore key down event */
|
|
if ((usage->hid & HID_USAGE) >> 8 == 0x05)
|
|
return -1;
|
|
/* Ignore key up event */
|
|
if ((usage->hid & HID_USAGE) >> 8 == 0x06)
|
|
return -1;
|
|
|
|
switch (usage->hid & HID_USAGE) {
|
|
/* Ignore configuration saved event */
|
|
case 0x0401: return -1;
|
|
/* Ignore reset event */
|
|
case 0x0402: return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#define REP_DSC_SIZE 236
|
|
#define USAGE_MAX_INDEX 59
|
|
|
|
static const __u8 *evision_report_fixup(struct hid_device *hdev, __u8 *rdesc,
|
|
unsigned int *rsize)
|
|
{
|
|
if (hdev->product == USB_DEVICE_ID_EV_TELINK_RECEIVER &&
|
|
*rsize == REP_DSC_SIZE && rdesc[USAGE_MAX_INDEX] == 0x29 &&
|
|
rdesc[USAGE_MAX_INDEX + 1] == 3) {
|
|
hid_info(hdev, "fixing EVision:TeLink Receiver report descriptor\n");
|
|
rdesc[USAGE_MAX_INDEX + 1] = 5; // change usage max from 3 to 5
|
|
}
|
|
return rdesc;
|
|
}
|
|
|
|
static const struct hid_device_id evision_devices[] = {
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_EVISION, USB_DEVICE_ID_EVISION_ICL01) },
|
|
{ HID_USB_DEVICE(USB_VENDOR_ID_EVISION, USB_DEVICE_ID_EV_TELINK_RECEIVER) },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(hid, evision_devices);
|
|
|
|
static struct hid_driver evision_driver = {
|
|
.name = "evision",
|
|
.id_table = evision_devices,
|
|
.input_mapping = evision_input_mapping,
|
|
.report_fixup = evision_report_fixup,
|
|
};
|
|
module_hid_driver(evision_driver);
|
|
|
|
MODULE_DESCRIPTION("HID driver for EVision devices");
|
|
MODULE_LICENSE("GPL");
|