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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* HID driver for some chicony "special" devices
*
* Copyright (c) 1999 Andreas Gal
* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
* Copyright (c) 2006-2007 Jiri Kosina
* Copyright (c) 2007 Paul Walmsley
* Copyright (c) 2008 Jiri Slaby
*/
/*
*/
#include <linux/device.h>
#include <linux/input.h>
#include <linux/hid.h>
#include <linux/module.h>
#include <linux/usb.h>
#include "hid-ids.h"
#define CH_WIRELESS_CTL_REPORT_ID 0x11
static int ch_report_wireless(struct hid_report *report, u8 *data, int size)
{
struct hid_device *hdev = report->device;
struct input_dev *input;
if (report->id != CH_WIRELESS_CTL_REPORT_ID || report->maxfield != 1)
return 0;
input = report->field[0]->hidinput->input;
if (!input) {
hid_warn(hdev, "can't find wireless radio control's input");
return 0;
}
input_report_key(input, KEY_RFKILL, 1);
input_sync(input);
input_report_key(input, KEY_RFKILL, 0);
input_sync(input);
return 1;
}
static int ch_raw_event(struct hid_device *hdev,
struct hid_report *report, u8 *data, int size)
{
if (report->application == HID_GD_WIRELESS_RADIO_CTLS)
return ch_report_wireless(report, data, size);
return 0;
}
#define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
EV_KEY, (c))
static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
struct hid_field *field, struct hid_usage *usage,
unsigned long **bit, int *max)
{
if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR)
return 0;
set_bit(EV_REP, hi->input->evbit);
switch (usage->hid & HID_USAGE) {
case 0xff01: ch_map_key_clear(BTN_1); break;
case 0xff02: ch_map_key_clear(BTN_2); break;
case 0xff03: ch_map_key_clear(BTN_3); break;
case 0xff04: ch_map_key_clear(BTN_4); break;
case 0xff05: ch_map_key_clear(BTN_5); break;
case 0xff06: ch_map_key_clear(BTN_6); break;
case 0xff07: ch_map_key_clear(BTN_7); break;
case 0xff08: ch_map_key_clear(BTN_8); break;
case 0xff09: ch_map_key_clear(BTN_9); break;
case 0xff0a: ch_map_key_clear(BTN_A); break;
case 0xff0b: ch_map_key_clear(BTN_B); break;
case 0x00f1: ch_map_key_clear(KEY_WLAN); break;
case 0x00f2: ch_map_key_clear(KEY_BRIGHTNESSDOWN); break;
case 0x00f3: ch_map_key_clear(KEY_BRIGHTNESSUP); break;
case 0x00f4: ch_map_key_clear(KEY_DISPLAY_OFF); break;
case 0x00f7: ch_map_key_clear(KEY_CAMERA); break;
case 0x00f8: ch_map_key_clear(KEY_PROG1); break;
default:
return 0;
}
return 1;
}
static const __u8 *ch_switch12_report_fixup(struct hid_device *hdev,
__u8 *rdesc, unsigned int *rsize)
{
struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
/* Change usage maximum and logical maximum from 0x7fff to
* 0x2fff, so they don't exceed HID_MAX_USAGES */
switch (hdev->product) {
case USB_DEVICE_ID_CHICONY_ACER_SWITCH12:
if (*rsize >= 128 && rdesc[64] == 0xff && rdesc[65] == 0x7f
&& rdesc[69] == 0xff && rdesc[70] == 0x7f) {
hid_info(hdev, "Fixing up report descriptor\n");
rdesc[65] = rdesc[70] = 0x2f;
}
break;
}
}
return rdesc;
}
static int ch_probe(struct hid_device *hdev, const struct hid_device_id *id)
{
int ret;
if (!hid_is_usb(hdev))
return -EINVAL;
hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "Chicony hid parse failed: %d\n", ret);
return ret;
}
ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
if (ret) {
hid_err(hdev, "Chicony hw start failed: %d\n", ret);
return ret;
}
return 0;
}
static const struct hid_device_id ch_devices[] = {
{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS3) },
{ HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_ACER_SWITCH12) },
{ }
};
MODULE_DEVICE_TABLE(hid, ch_devices);
static struct hid_driver ch_driver = {
.name = "chicony",
.id_table = ch_devices,
.report_fixup = ch_switch12_report_fixup,
.input_mapping = ch_input_mapping,
.probe = ch_probe,
.raw_event = ch_raw_event,
};
module_hid_driver(ch_driver);
MODULE_DESCRIPTION("HID driver for some chicony \"special\" devices");
MODULE_LICENSE("GPL");
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