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Linux/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_AK1D) },
 88         { HID_USB_DEVICE(USB_VENDOR_ID_CHICONY, USB_DEVICE_ID_CHICONY_ACER_SWITCH12) },
 89         { }
 90 };
 91 MODULE_DEVICE_TABLE(hid, ch_devices);
 92 
 93 static 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 };
 99 module_hid_driver(ch_driver);
100 
101 MODULE_LICENSE("GPL");
102 

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