drivers/hid/hid-chicony.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  *  HID driver for some chicony "special" devices
0004  *
0005  *  Copyright (c) 1999 Andreas Gal
0006  *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
0007  *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
0008  *  Copyright (c) 2006-2007 Jiri Kosina
0009  *  Copyright (c) 2007 Paul Walmsley
0010  *  Copyright (c) 2008 Jiri Slaby
0011  */
0012
0013 /*
0014  */
0015
0016 #include <linux/device.h>
0017 #include <linux/input.h>
0018 #include <linux/hid.h>
0019 #include <linux/module.h>
0020 #include <linux/usb.h>
0021
0022 #include "hid-ids.h"
0023
0024 #define CH_WIRELESS_CTL_REPORT_ID   0x11
0025
0026 static int ch_report_wireless(struct hid_report *report, u8 *data, int size)
0027 {
0028     struct hid_device *hdev = report->device;
0029     struct input_dev *input;
0030
0031     if (report->id != CH_WIRELESS_CTL_REPORT_ID || report->maxfield != 1)
0032         return 0;
0033
0034     input = report->field[0]->hidinput->input;
0035     if (!input) {
0036         hid_warn(hdev, "can't find wireless radio control's input");
0037         return 0;
0038     }
0039
0040     input_report_key(input, KEY_RFKILL, 1);
0041     input_sync(input);
0042     input_report_key(input, KEY_RFKILL, 0);
0043     input_sync(input);
0044
0045     return 1;
0046 }
0047
0048 static int ch_raw_event(struct hid_device *hdev,
0049         struct hid_report *report, u8 *data, int size)
0050 {
0051     if (report->application == HID_GD_WIRELESS_RADIO_CTLS)
0052         return ch_report_wireless(report, data, size);
0053
0054     return 0;
0055 }
0056
0057 #define ch_map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, \
0058                     EV_KEY, (c))
0059 static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
0060         struct hid_field *field, struct hid_usage *usage,
0061         unsigned long **bit, int *max)
0062 {
0063     if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR)
0064         return 0;
0065
0066     set_bit(EV_REP, hi->input->evbit);
0067     switch (usage->hid & HID_USAGE) {
0068     case 0xff01: ch_map_key_clear(BTN_1);   break;
0069     case 0xff02: ch_map_key_clear(BTN_2);   break;
0070     case 0xff03: ch_map_key_clear(BTN_3);   break;
0071     case 0xff04: ch_map_key_clear(BTN_4);   break;
0072     case 0xff05: ch_map_key_clear(BTN_5);   break;
0073     case 0xff06: ch_map_key_clear(BTN_6);   break;
0074     case 0xff07: ch_map_key_clear(BTN_7);   break;
0075     case 0xff08: ch_map_key_clear(BTN_8);   break;
0076     case 0xff09: ch_map_key_clear(BTN_9);   break;
0077     case 0xff0a: ch_map_key_clear(BTN_A);   break;
0078     case 0xff0b: ch_map_key_clear(BTN_B);   break;
0079     case 0x00f1: ch_map_key_clear(KEY_WLAN);    break;
0080     case 0x00f2: ch_map_key_clear(KEY_BRIGHTNESSDOWN);  break;
0081     case 0x00f3: ch_map_key_clear(KEY_BRIGHTNESSUP);    break;
0082     case 0x00f4: ch_map_key_clear(KEY_DISPLAY_OFF); break;
0083     case 0x00f7: ch_map_key_clear(KEY_CAMERA);  break;
0084     case 0x00f8: ch_map_key_clear(KEY_PROG1);   break;
0085     default:
0086         return 0;
0087     }
0088     return 1;
0089 }
0090
0091 static __u8 *ch_switch12_report_fixup(struct hid_device *hdev, __u8 *rdesc,
0092         unsigned int *rsize)
0093 {
0094     struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
0095
0096     if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
0097         /* Change usage maximum and logical maximum from 0x7fff to
0098          * 0x2fff, so they don't exceed HID_MAX_USAGES */
0099         switch (hdev->product) {
0100         case USB_DEVICE_ID_CHICONY_ACER_SWITCH12:
0101             if (*rsize >= 128 && rdesc[64] == 0xff && rdesc[65] == 0x7f
0102                     && rdesc[69] == 0xff && rdesc[70] == 0x7f) {
0103                 hid_info(hdev, "Fixing up report descriptor\n");
0104                 rdesc[65] = rdesc[70] = 0x2f;
0105             }
0106             break;
0107         }
0108
0109     }
0110     return rdesc;
0111 }
0112
0113 static int ch_probe(struct hid_device *hdev, const struct hid_device_id *id)
0114 {
0115     int ret;
0116
0117     if (!hid_is_usb(hdev))
0118         return -EINVAL;
0119
0120     hdev->quirks |= HID_QUIRK_INPUT_PER_APP;
0121     ret = hid_parse(hdev);
0122     if (ret) {
0123         hid_err(hdev, "Chicony hid parse failed: %d\n", ret);
0124         return ret;
0125     }
0126
0127     ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
0128     if (ret) {
0129         hid_err(hdev, "Chicony hw start failed: %d\n", ret);
0130         return ret;
0131     }
0132
0133     return 0;
0134 }
0135
0136 static const struct hid_device_id ch_devices[] = {
0137     { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
0138     { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) },
0139     { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS3) },
0140     { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_ACER_SWITCH12) },
0141     { }
0142 };
0143 MODULE_DEVICE_TABLE(hid, ch_devices);
0144
0145 static struct hid_driver ch_driver = {
0146     .name = "chicony",
0147     .id_table = ch_devices,
0148     .report_fixup = ch_switch12_report_fixup,
0149     .input_mapping = ch_input_mapping,
0150     .probe = ch_probe,
0151     .raw_event = ch_raw_event,
0152 };
0153 module_hid_driver(ch_driver);
0154
0155 MODULE_LICENSE("GPL");