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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 | /* * HID driver for Holtek keyboard * Copyright (c) 2012 Tom Harwood */ /* * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the Free * Software Foundation; either version 2 of the License, or (at your option) * any later version. */ #include <linux/device.h> #include <linux/hid.h> #include <linux/module.h> #include <linux/usb.h> #include "hid-ids.h" #include "usbhid/usbhid.h" /* Holtek based keyboards (USB ID 04d9:a055) have the following issues: * - The report descriptor specifies an excessively large number of consumer * usages (2^15), which is more than HID_MAX_USAGES. This prevents proper * parsing of the report descriptor. * - The report descriptor reports on caps/scroll/num lock key presses, but * doesn't have an LED output usage block. * * The replacement descriptor below fixes the number of consumer usages, * and provides an LED output usage block. LED output events are redirected * to the boot interface. */ static __u8 holtek_kbd_rdesc_fixed[] = { /* Original report descriptor, with reduced number of consumer usages */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x80, /* Usage (Sys Control), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x01, /* Report ID (1), */ 0x19, 0x81, /* Usage Minimum (Sys Power Down), */ 0x29, 0x83, /* Usage Maximum (Sys Wake Up), */ 0x15, 0x00, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x95, 0x03, /* Report Count (3), */ 0x75, 0x01, /* Report Size (1), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x01, /* Report Count (1), */ 0x75, 0x05, /* Report Size (5), */ 0x81, 0x01, /* Input (Constant), */ 0xC0, /* End Collection, */ 0x05, 0x0C, /* Usage Page (Consumer), */ 0x09, 0x01, /* Usage (Consumer Control), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x02, /* Report ID (2), */ 0x19, 0x00, /* Usage Minimum (00h), */ 0x2A, 0xFF, 0x2F, /* Usage Maximum (0x2FFF), previously 0x7FFF */ 0x15, 0x00, /* Logical Minimum (0), */ 0x26, 0xFF, 0x2F, /* Logical Maximum (0x2FFF),previously 0x7FFF*/ 0x95, 0x01, /* Report Count (1), */ 0x75, 0x10, /* Report Size (16), */ 0x81, 0x00, /* Input, */ 0xC0, /* End Collection, */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x06, /* Usage (Keyboard), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x03, /* Report ID (3), */ 0x95, 0x38, /* Report Count (56), */ 0x75, 0x01, /* Report Size (1), */ 0x15, 0x00, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x05, 0x07, /* Usage Page (Keyboard), */ 0x19, 0xE0, /* Usage Minimum (KB Leftcontrol), */ 0x29, 0xE7, /* Usage Maximum (KB Right GUI), */ 0x19, 0x00, /* Usage Minimum (None), */ 0x29, 0x2F, /* Usage Maximum (KB Lboxbracket And Lbrace),*/ 0x81, 0x02, /* Input (Variable), */ 0xC0, /* End Collection, */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x06, /* Usage (Keyboard), */ 0xA1, 0x01, /* Collection (Application), */ 0x85, 0x04, /* Report ID (4), */ 0x95, 0x38, /* Report Count (56), */ 0x75, 0x01, /* Report Size (1), */ 0x15, 0x00, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x05, 0x07, /* Usage Page (Keyboard), */ 0x19, 0x30, /* Usage Minimum (KB Rboxbracket And Rbrace),*/ 0x29, 0x67, /* Usage Maximum (KP Equals), */ 0x81, 0x02, /* Input (Variable), */ 0xC0, /* End Collection */ /* LED usage for the boot protocol interface */ 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x06, /* Usage (Keyboard), */ 0xA1, 0x01, /* Collection (Application), */ 0x05, 0x08, /* Usage Page (LED), */ 0x19, 0x01, /* Usage Minimum (01h), */ 0x29, 0x03, /* Usage Maximum (03h), */ 0x15, 0x00, /* Logical Minimum (0), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x03, /* Report Count (3), */ 0x91, 0x02, /* Output (Variable), */ 0x95, 0x05, /* Report Count (5), */ 0x91, 0x01, /* Output (Constant), */ 0xC0, /* End Collection */ }; static __u8 *holtek_kbd_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) { rdesc = holtek_kbd_rdesc_fixed; *rsize = sizeof(holtek_kbd_rdesc_fixed); } return rdesc; } static int holtek_kbd_input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value) { struct hid_device *hid = input_get_drvdata(dev); struct usb_device *usb_dev = hid_to_usb_dev(hid); /* Locate the boot interface, to receive the LED change events */ struct usb_interface *boot_interface = usb_ifnum_to_if(usb_dev, 0); struct hid_device *boot_hid; struct hid_input *boot_hid_input; if (unlikely(boot_interface == NULL)) return -ENODEV; boot_hid = usb_get_intfdata(boot_interface); boot_hid_input = list_first_entry(&boot_hid->inputs, struct hid_input, list); return boot_hid_input->input->event(boot_hid_input->input, type, code, value); } static int holtek_kbd_probe(struct hid_device *hdev, const struct hid_device_id *id) { struct usb_interface *intf = to_usb_interface(hdev->dev.parent); int ret = hid_parse(hdev); if (!ret) ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); if (!ret && intf->cur_altsetting->desc.bInterfaceNumber == 1) { struct hid_input *hidinput; list_for_each_entry(hidinput, &hdev->inputs, list) { hidinput->input->event = holtek_kbd_input_event; } } return ret; } static const struct hid_device_id holtek_kbd_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_HOLTEK_ALT, USB_DEVICE_ID_HOLTEK_ALT_KEYBOARD) }, { } }; MODULE_DEVICE_TABLE(hid, holtek_kbd_devices); static struct hid_driver holtek_kbd_driver = { .name = "holtek_kbd", .id_table = holtek_kbd_devices, .report_fixup = holtek_kbd_report_fixup, .probe = holtek_kbd_probe }; module_hid_driver(holtek_kbd_driver); MODULE_LICENSE("GPL"); |