linux/drivers/hid/hid-chicony.c
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   1/*
   2 *  HID driver for some chicony "special" devices
   3 *
   4 *  Copyright (c) 1999 Andreas Gal
   5 *  Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
   6 *  Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
   7 *  Copyright (c) 2006-2007 Jiri Kosina
   8 *  Copyright (c) 2007 Paul Walmsley
   9 *  Copyright (c) 2008 Jiri Slaby
  10 */
  11
  12/*
  13 * This program is free software; you can redistribute it and/or modify it
  14 * under the terms of the GNU General Public License as published by the Free
  15 * Software Foundation; either version 2 of the License, or (at your option)
  16 * any later version.
  17 */
  18
  19#include <linux/device.h>
  20#include <linux/input.h>
  21#include <linux/hid.h>
  22#include <linux/module.h>
  23#include <linux/usb.h>
  24
  25#include "hid-ids.h"
  26
  27#define ch_map_key_clear(c)     hid_map_usage_clear(hi, usage, bit, max, \
  28                                        EV_KEY, (c))
  29static int ch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
  30                struct hid_field *field, struct hid_usage *usage,
  31                unsigned long **bit, int *max)
  32{
  33        if ((usage->hid & HID_USAGE_PAGE) != HID_UP_MSVENDOR)
  34                return 0;
  35
  36        set_bit(EV_REP, hi->input->evbit);
  37        switch (usage->hid & HID_USAGE) {
  38        case 0xff01: ch_map_key_clear(BTN_1);   break;
  39        case 0xff02: ch_map_key_clear(BTN_2);   break;
  40        case 0xff03: ch_map_key_clear(BTN_3);   break;
  41        case 0xff04: ch_map_key_clear(BTN_4);   break;
  42        case 0xff05: ch_map_key_clear(BTN_5);   break;
  43        case 0xff06: ch_map_key_clear(BTN_6);   break;
  44        case 0xff07: ch_map_key_clear(BTN_7);   break;
  45        case 0xff08: ch_map_key_clear(BTN_8);   break;
  46        case 0xff09: ch_map_key_clear(BTN_9);   break;
  47        case 0xff0a: ch_map_key_clear(BTN_A);   break;
  48        case 0xff0b: ch_map_key_clear(BTN_B);   break;
  49        case 0x00f1: ch_map_key_clear(KEY_WLAN);        break;
  50        case 0x00f2: ch_map_key_clear(KEY_BRIGHTNESSDOWN);      break;
  51        case 0x00f3: ch_map_key_clear(KEY_BRIGHTNESSUP);        break;
  52        case 0x00f4: ch_map_key_clear(KEY_DISPLAY_OFF); break;
  53        case 0x00f7: ch_map_key_clear(KEY_CAMERA);      break;
  54        case 0x00f8: ch_map_key_clear(KEY_PROG1);       break;
  55        default:
  56                return 0;
  57        }
  58        return 1;
  59}
  60
  61static __u8 *ch_switch12_report_fixup(struct hid_device *hdev, __u8 *rdesc,
  62                unsigned int *rsize)
  63{
  64        struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
  65        
  66        if (intf->cur_altsetting->desc.bInterfaceNumber == 1) {
  67                /* Change usage maximum and logical maximum from 0x7fff to
  68                 * 0x2fff, so they don't exceed HID_MAX_USAGES */
  69                switch (hdev->product) {
  70                case USB_DEVICE_ID_CHICONY_ACER_SWITCH12:
  71                        if (*rsize >= 128 && rdesc[64] == 0xff && rdesc[65] == 0x7f
  72                                        && rdesc[69] == 0xff && rdesc[70] == 0x7f) {
  73                                hid_info(hdev, "Fixing up report descriptor\n");
  74                                rdesc[65] = rdesc[70] = 0x2f;
  75                        }
  76                        break;
  77                }
  78
  79        }
  80        return rdesc;
  81}
  82
  83
  84static const struct hid_device_id ch_devices[] = {
  85        { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_TACTICAL_PAD) },
  86        { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_WIRELESS2) },
  87        { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_AK1D) },
  88        { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_ACER_SWITCH12) },
  89        { }
  90};
  91MODULE_DEVICE_TABLE(hid, ch_devices);
  92
  93static struct hid_driver ch_driver = {
  94        .name = "chicony",
  95        .id_table = ch_devices,
  96        .report_fixup = ch_switch12_report_fixup,
  97        .input_mapping = ch_input_mapping,
  98};
  99module_hid_driver(ch_driver);
 100
 101MODULE_LICENSE("GPL");
 102
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