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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * HID driver for some chicony "special" devices4 *5 * Copyright (c) 1999 Andreas Gal6 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>7 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc8 * Copyright (c) 2006-2007 Jiri Kosina9 * Copyright (c) 2007 Paul Walmsley10 * Copyright (c) 2008 Jiri Slaby11 */12 13/*14 */15 16#include <linux/device.h>17#include <linux/input.h>18#include <linux/hid.h>19#include <linux/module.h>20#include <linux/usb.h>21 22#include "hid-ids.h"23 24#define CH_WIRELESS_CTL_REPORT_ID 0x1125 26static int ch_report_wireless(struct hid_report *report, u8 *data, int size)27{28 struct hid_device *hdev = report->device;29 struct input_dev *input;30 31 if (report->id != CH_WIRELESS_CTL_REPORT_ID || report->maxfield != 1)32 return 0;33 34 input = report->field[0]->hidinput->input;35 if (!input) {36 hid_warn(hdev, "can't find wireless radio control's input");37 return 0;38 }39 40 input_report_key(input, KEY_RFKILL, 1);41 input_sync(input);42 input_report_key(input, KEY_RFKILL, 0);43 input_sync(input);44 45 return 1;46}47 48static int ch_raw_event(struct hid_device *hdev,49 struct hid_report *report, u8 *data, int size)50{51 if (report->application == HID_GD_WIRELESS_RADIO_CTLS)52 return ch_report_wireless(report, data, size);53 54 return 0;55}56 57#define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \58 EV_KEY, (c))59static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,60 struct hid_field *field, struct hid_usage *usage,61 unsigned long **bit, int *max)62{63 if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR)64 return 0;65 66 set_bit(EV_REP, hi->input->evbit);67 switch (usage->hid & HID_USAGE) {68 case 0xff01: ch_map_key_clear(BTN_1); break;69 case 0xff02: ch_map_key_clear(BTN_2); break;70 case 0xff03: ch_map_key_clear(BTN_3); break;71 case 0xff04: ch_map_key_clear(BTN_4); break;72 case 0xff05: ch_map_key_clear(BTN_5); break;73 case 0xff06: ch_map_key_clear(BTN_6); break;74 case 0xff07: ch_map_key_clear(BTN_7); break;75 case 0xff08: ch_map_key_clear(BTN_8); break;76 case 0xff09: ch_map_key_clear(BTN_9); break;77 case 0xff0a: ch_map_key_clear(BTN_A); break;78 case 0xff0b: ch_map_key_clear(BTN_B); break;79 case 0x00f1: ch_map_key_clear(KEY_WLAN); break;80 case 0x00f2: ch_map_key_clear(KEY_BRIGHTNESSDOWN); break;81 case 0x00f3: ch_map_key_clear(KEY_BRIGHTNESSUP); break;82 case 0x00f4: ch_map_key_clear(KEY_DISPLAY_OFF); break;83 case 0x00f7: ch_map_key_clear(KEY_CAMERA); break;84 case 0x00f8: ch_map_key_clear(KEY_PROG1); break;85 default:86 return 0;87 }88 return 1;89}90 91static const __u8 *ch_switch12_report_fixup(struct hid_device *hdev,92 __u8 *rdesc, unsigned int *rsize)93{94 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);95 96 if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {97 /* Change usage maximum and logical maximum from 0x7fff to98 * 0x2fff, so they don't exceed HID_MAX_USAGES */99 switch (hdev->product) {100 case USB_DEVICE_ID_CHICONY_ACER_SWITCH12:101 if (*rsize >= 128 && rdesc[64] == 0xff && rdesc[65] == 0x7f102 && rdesc[69] == 0xff && rdesc[70] == 0x7f) {103 hid_info(hdev, "Fixing up report descriptor\n");104 rdesc[65] = rdesc[70] = 0x2f;105 }106 break;107 }108 109 }110 return rdesc;111}112 113static int ch_probe(struct hid_device *hdev, const struct hid_device_id *id)114{115 int ret;116 117 if (!hid_is_usb(hdev))118 return -EINVAL;119 120 hdev->quirks |= HID_QUIRK_INPUT_PER_APP;121 ret = hid_parse(hdev);122 if (ret) {123 hid_err(hdev, "Chicony hid parse failed: %d\n", ret);124 return ret;125 }126 127 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);128 if (ret) {129 hid_err(hdev, "Chicony hw start failed: %d\n", ret);130 return ret;131 }132 133 return 0;134}135 136static const struct hid_device_id ch_devices[] = {137 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },138 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) },139 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS3) },140 { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_ACER_SWITCH12) },141 { }142};143MODULE_DEVICE_TABLE(hid, ch_devices);144 145static struct hid_driver ch_driver = {146 .name = "chicony",147 .id_table = ch_devices,148 .report_fixup = ch_switch12_report_fixup,149 .input_mapping = ch_input_mapping,150 .probe = ch_probe,151 .raw_event = ch_raw_event,152};153module_hid_driver(ch_driver);154 155MODULE_DESCRIPTION("HID driver for some chicony \"special\" devices");156MODULE_LICENSE("GPL");157