drivers/hid/hid-chicony.c

   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))
  29 static 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
  61 static __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
  84 static 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_ACER_SWITCH12) },
  88         { }
  89 };
  90 MODULE_DEVICE_TABLE(hid, ch_devices);
  91
  92 static struct hid_driver ch_driver = {
  93         .name = "chicony",
  94         .id_table = ch_devices,
  95         .report_fixup = ch_switch12_report_fixup,
  96         .input_mapping = ch_input_mapping,
  97 };
  98 module_hid_driver(ch_driver);
  99
 100 MODULE_LICENSE("GPL");