linux/drivers/hid/hid-samsung.c
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   1/*
   2 *  HID driver for some samsung "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) 2008 Jiri Slaby
   9 *  Copyright (c) 2010 Don Prince <dhprince.devel@yahoo.co.uk>
  10 *
  11 *
  12 *  This driver supports several HID devices:
  13 *
  14 *  [0419:0001] Samsung IrDA remote controller (reports as Cypress USB Mouse).
  15 *      various hid report fixups for different variants.
  16 *
  17 *  [0419:0600] Creative Desktop Wireless 6000 keyboard/mouse combo
  18 *      several key mappings used from the consumer usage page
  19 *      deviate from the USB HUT 1.12 standard.
  20 *
  21 */
  22
  23/*
  24 * This program is free software; you can redistribute it and/or modify it
  25 * under the terms of the GNU General Public License as published by the Free
  26 * Software Foundation; either version 2 of the License, or (at your option)
  27 * any later version.
  28 */
  29
  30#include <linux/device.h>
  31#include <linux/usb.h>
  32#include <linux/hid.h>
  33#include <linux/module.h>
  34
  35#include "hid-ids.h"
  36
  37/*
  38 * There are several variants for 0419:0001:
  39 *
  40 * 1. 184 byte report descriptor
  41 * Vendor specific report #4 has a size of 48 bit,
  42 * and therefore is not accepted when inspecting the descriptors.
  43 * As a workaround we reinterpret the report as:
  44 *   Variable type, count 6, size 8 bit, log. maximum 255
  45 * The burden to reconstruct the data is moved into user space.
  46 *
  47 * 2. 203 byte report descriptor
  48 * Report #4 has an array field with logical range 0..18 instead of 1..15.
  49 *
  50 * 3. 135 byte report descriptor
  51 * Report #4 has an array field with logical range 0..17 instead of 1..14.
  52 *
  53 * 4. 171 byte report descriptor
  54 * Report #3 has an array field with logical range 0..1 instead of 1..3.
  55 */
  56static inline void samsung_irda_dev_trace(struct hid_device *hdev,
  57                unsigned int rsize)
  58{
  59        hid_info(hdev, "fixing up Samsung IrDA %d byte report descriptor\n",
  60                 rsize);
  61}
  62
  63static __u8 *samsung_irda_report_fixup(struct hid_device *hdev, __u8 *rdesc,
  64                unsigned int *rsize)
  65{
  66        if (*rsize == 184 && rdesc[175] == 0x25 && rdesc[176] == 0x40 &&
  67                        rdesc[177] == 0x75 && rdesc[178] == 0x30 &&
  68                        rdesc[179] == 0x95 && rdesc[180] == 0x01 &&
  69                        rdesc[182] == 0x40) {
  70                samsung_irda_dev_trace(hdev, 184);
  71                rdesc[176] = 0xff;
  72                rdesc[178] = 0x08;
  73                rdesc[180] = 0x06;
  74                rdesc[182] = 0x42;
  75        } else
  76        if (*rsize == 203 && rdesc[192] == 0x15 && rdesc[193] == 0x0 &&
  77                        rdesc[194] == 0x25 && rdesc[195] == 0x12) {
  78                samsung_irda_dev_trace(hdev, 203);
  79                rdesc[193] = 0x1;
  80                rdesc[195] = 0xf;
  81        } else
  82        if (*rsize == 135 && rdesc[124] == 0x15 && rdesc[125] == 0x0 &&
  83                        rdesc[126] == 0x25 && rdesc[127] == 0x11) {
  84                samsung_irda_dev_trace(hdev, 135);
  85                rdesc[125] = 0x1;
  86                rdesc[127] = 0xe;
  87        } else
  88        if (*rsize == 171 && rdesc[160] == 0x15 && rdesc[161] == 0x0 &&
  89                        rdesc[162] == 0x25 && rdesc[163] == 0x01) {
  90                samsung_irda_dev_trace(hdev, 171);
  91                rdesc[161] = 0x1;
  92                rdesc[163] = 0x3;
  93        }
  94        return rdesc;
  95}
  96
  97#define samsung_kbd_mouse_map_key_clear(c) \
  98        hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c))
  99
 100static int samsung_kbd_mouse_input_mapping(struct hid_device *hdev,
 101        struct hid_input *hi, struct hid_field *field, struct hid_usage *usage,
 102        unsigned long **bit, int *max)
 103{
 104        struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 105        unsigned short ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
 106
 107        if (1 != ifnum || HID_UP_CONSUMER != (usage->hid & HID_USAGE_PAGE))
 108                return 0;
 109
 110        dbg_hid("samsung wireless keyboard/mouse input mapping event [0x%x]\n",
 111                usage->hid & HID_USAGE);
 112
 113        switch (usage->hid & HID_USAGE) {
 114        /* report 2 */
 115        case 0x183: samsung_kbd_mouse_map_key_clear(KEY_MEDIA); break;
 116        case 0x195: samsung_kbd_mouse_map_key_clear(KEY_EMAIL); break;
 117        case 0x196: samsung_kbd_mouse_map_key_clear(KEY_CALC); break;
 118        case 0x197: samsung_kbd_mouse_map_key_clear(KEY_COMPUTER); break;
 119        case 0x22b: samsung_kbd_mouse_map_key_clear(KEY_SEARCH); break;
 120        case 0x22c: samsung_kbd_mouse_map_key_clear(KEY_WWW); break;
 121        case 0x22d: samsung_kbd_mouse_map_key_clear(KEY_BACK); break;
 122        case 0x22e: samsung_kbd_mouse_map_key_clear(KEY_FORWARD); break;
 123        case 0x22f: samsung_kbd_mouse_map_key_clear(KEY_FAVORITES); break;
 124        case 0x230: samsung_kbd_mouse_map_key_clear(KEY_REFRESH); break;
 125        case 0x231: samsung_kbd_mouse_map_key_clear(KEY_STOP); break;
 126        default:
 127                return 0;
 128        }
 129
 130        return 1;
 131}
 132
 133static __u8 *samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 134        unsigned int *rsize)
 135{
 136        if (USB_DEVICE_ID_SAMSUNG_IR_REMOTE == hdev->product)
 137                rdesc = samsung_irda_report_fixup(hdev, rdesc, rsize);
 138        return rdesc;
 139}
 140
 141static int samsung_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 142        struct hid_field *field, struct hid_usage *usage,
 143        unsigned long **bit, int *max)
 144{
 145        int ret = 0;
 146
 147        if (USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE == hdev->product)
 148                ret = samsung_kbd_mouse_input_mapping(hdev,
 149                        hi, field, usage, bit, max);
 150
 151        return ret;
 152}
 153
 154static int samsung_probe(struct hid_device *hdev,
 155                const struct hid_device_id *id)
 156{
 157        int ret;
 158        unsigned int cmask = HID_CONNECT_DEFAULT;
 159
 160        ret = hid_parse(hdev);
 161        if (ret) {
 162                hid_err(hdev, "parse failed\n");
 163                goto err_free;
 164        }
 165
 166        if (USB_DEVICE_ID_SAMSUNG_IR_REMOTE == hdev->product) {
 167                if (hdev->rsize == 184) {
 168                        /* disable hidinput, force hiddev */
 169                        cmask = (cmask & ~HID_CONNECT_HIDINPUT) |
 170                                HID_CONNECT_HIDDEV_FORCE;
 171                }
 172        }
 173
 174        ret = hid_hw_start(hdev, cmask);
 175        if (ret) {
 176                hid_err(hdev, "hw start failed\n");
 177                goto err_free;
 178        }
 179
 180        return 0;
 181err_free:
 182        return ret;
 183}
 184
 185static const struct hid_device_id samsung_devices[] = {
 186        { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
 187        { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE) },
 188        { }
 189};
 190MODULE_DEVICE_TABLE(hid, samsung_devices);
 191
 192static struct hid_driver samsung_driver = {
 193        .name = "samsung",
 194        .id_table = samsung_devices,
 195        .report_fixup = samsung_report_fixup,
 196        .input_mapping = samsung_input_mapping,
 197        .probe = samsung_probe,
 198};
 199
 200static int __init samsung_init(void)
 201{
 202        return hid_register_driver(&samsung_driver);
 203}
 204
 205static void __exit samsung_exit(void)
 206{
 207        hid_unregister_driver(&samsung_driver);
 208}
 209
 210module_init(samsung_init);
 211module_exit(samsung_exit);
 212MODULE_LICENSE("GPL");
 213
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