1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * HID driver for some chicony "special" devices 4 * 5 * Copyright (c) 1999 Andreas Gal 6 * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> 7 * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc 8 * Copyright (c) 2006-2007 Jiri Kosina 9 * Copyright (c) 2007 Paul Walmsley 10 * Copyright (c) 2008 Jiri Slaby 11 */ 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 0x11 25 26 static 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 48 static 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)) 59 static 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 91 static __u8 *ch_switch12_report_fixup(struct hid_device *hdev, __u8 *rdesc, 92 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 to 98 * 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] == 0x7f 102 && 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 } 112 113 static 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 } 135 136 static 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 }; 143 MODULE_DEVICE_TABLE(hid, ch_devices); 144 145 static 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 }; 153 module_hid_driver(ch_driver); 154 155 MODULE_LICENSE("GPL"); 156