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) 2007 Paul Walmsley
   9 *  Copyright (c) 2008 Jiri Slaby
  10 *  Copyright (c) 2010 Don Prince <dhprince.devel@yahoo.co.uk>
  11 *
  12 *
  13 *  This driver supports several HID devices:
  14 *
  15 *  [0419:0001] Samsung IrDA remote controller (reports as Cypress USB Mouse).
  16 *      various hid report fixups for different variants.
  17 *
  18 *  [0419:0600] Creative Desktop Wireless 6000 keyboard/mouse combo
  19 *      several key mappings used from the consumer usage page
  20 *      deviate from the USB HUT 1.12 standard.
  21 *
  22 */
  23
  24/*
  25 * This program is free software; you can redistribute it and/or modify it
  26 * under the terms of the GNU General Public License as published by the Free
  27 * Software Foundation; either version 2 of the License, or (at your option)
  28 * any later version.
  29 */
  30
  31#include <linux/device.h>
  32#include <linux/usb.h>
  33#include <linux/hid.h>
  34#include <linux/module.h>
  35
  36#include "hid-ids.h"
  37
  38/*
  39 * There are several variants for 0419:0001:
  40 *
  41 * 1. 184 byte report descriptor
  42 * Vendor specific report #4 has a size of 48 bit,
  43 * and therefore is not accepted when inspecting the descriptors.
  44 * As a workaround we reinterpret the report as:
  45 *   Variable type, count 6, size 8 bit, log. maximum 255
  46 * The burden to reconstruct the data is moved into user space.
  47 *
  48 * 2. 203 byte report descriptor
  49 * Report #4 has an array field with logical range 0..18 instead of 1..15.
  50 *
  51 * 3. 135 byte report descriptor
  52 * Report #4 has an array field with logical range 0..17 instead of 1..14.
  53 *
  54 * 4. 171 byte report descriptor
  55 * Report #3 has an array field with logical range 0..1 instead of 1..3.
  56 */
  57static inline void samsung_irda_dev_trace(struct hid_device *hdev,
  58                unsigned int rsize)
  59{
  60        hid_info(hdev, "fixing up Samsung IrDA %d byte report descriptor\n",
  61                 rsize);
  62}
  63
  64static __u8 *samsung_irda_report_fixup(struct hid_device *hdev, __u8 *rdesc,
  65                unsigned int *rsize)
  66{
  67        if (*rsize == 184 && rdesc[175] == 0x25 && rdesc[176] == 0x40 &&
  68                        rdesc[177] == 0x75 && rdesc[178] == 0x30 &&
  69                        rdesc[179] == 0x95 && rdesc[180] == 0x01 &&
  70                        rdesc[182] == 0x40) {
  71                samsung_irda_dev_trace(hdev, 184);
  72                rdesc[176] = 0xff;
  73                rdesc[178] = 0x08;
  74                rdesc[180] = 0x06;
  75                rdesc[182] = 0x42;
  76        } else
  77        if (*rsize == 203 && rdesc[192] == 0x15 && rdesc[193] == 0x0 &&
  78                        rdesc[194] == 0x25 && rdesc[195] == 0x12) {
  79                samsung_irda_dev_trace(hdev, 203);
  80                rdesc[193] = 0x1;
  81                rdesc[195] = 0xf;
  82        } else
  83        if (*rsize == 135 && rdesc[124] == 0x15 && rdesc[125] == 0x0 &&
  84                        rdesc[126] == 0x25 && rdesc[127] == 0x11) {
  85                samsung_irda_dev_trace(hdev, 135);
  86                rdesc[125] = 0x1;
  87                rdesc[127] = 0xe;
  88        } else
  89        if (*rsize == 171 && rdesc[160] == 0x15 && rdesc[161] == 0x0 &&
  90                        rdesc[162] == 0x25 && rdesc[163] == 0x01) {
  91                samsung_irda_dev_trace(hdev, 171);
  92                rdesc[161] = 0x1;
  93                rdesc[163] = 0x3;
  94        }
  95        return rdesc;
  96}
  97
  98#define samsung_kbd_mouse_map_key_clear(c) \
  99        hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c))
 100
 101static int samsung_kbd_mouse_input_mapping(struct hid_device *hdev,
 102        struct hid_input *hi, struct hid_field *field, struct hid_usage *usage,
 103        unsigned long **bit, int *max)
 104{
 105        struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
 106        unsigned short ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
 107
 108        if (1 != ifnum || HID_UP_CONSUMER != (usage->hid & HID_USAGE_PAGE))
 109                return 0;
 110
 111        dbg_hid("samsung wireless keyboard/mouse input mapping event [0x%x]\n",
 112                usage->hid & HID_USAGE);
 113
 114        switch (usage->hid & HID_USAGE) {
 115        /* report 2 */
 116        case 0x183: samsung_kbd_mouse_map_key_clear(KEY_MEDIA); break;
 117        case 0x195: samsung_kbd_mouse_map_key_clear(KEY_EMAIL); break;
 118        case 0x196: samsung_kbd_mouse_map_key_clear(KEY_CALC); break;
 119        case 0x197: samsung_kbd_mouse_map_key_clear(KEY_COMPUTER); break;
 120        case 0x22b: samsung_kbd_mouse_map_key_clear(KEY_SEARCH); break;
 121        case 0x22c: samsung_kbd_mouse_map_key_clear(KEY_WWW); break;
 122        case 0x22d: samsung_kbd_mouse_map_key_clear(KEY_BACK); break;
 123        case 0x22e: samsung_kbd_mouse_map_key_clear(KEY_FORWARD); break;
 124        case 0x22f: samsung_kbd_mouse_map_key_clear(KEY_FAVORITES); break;
 125        case 0x230: samsung_kbd_mouse_map_key_clear(KEY_REFRESH); break;
 126        case 0x231: samsung_kbd_mouse_map_key_clear(KEY_STOP); break;
 127        default:
 128                return 0;
 129        }
 130
 131        return 1;
 132}
 133
 134static __u8 *samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 135        unsigned int *rsize)
 136{
 137        if (USB_DEVICE_ID_SAMSUNG_IR_REMOTE == hdev->product)
 138                rdesc = samsung_irda_report_fixup(hdev, rdesc, rsize);
 139        return rdesc;
 140}
 141
 142static int samsung_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 143        struct hid_field *field, struct hid_usage *usage,
 144        unsigned long **bit, int *max)
 145{
 146        int ret = 0;
 147
 148        if (USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE == hdev->product)
 149                ret = samsung_kbd_mouse_input_mapping(hdev,
 150                        hi, field, usage, bit, max);
 151
 152        return ret;
 153}
 154
 155static int samsung_probe(struct hid_device *hdev,
 156                const struct hid_device_id *id)
 157{
 158        int ret;
 159        unsigned int cmask = HID_CONNECT_DEFAULT;
 160
 161        ret = hid_parse(hdev);
 162        if (ret) {
 163                hid_err(hdev, "parse failed\n");
 164                goto err_free;
 165        }
 166
 167        if (USB_DEVICE_ID_SAMSUNG_IR_REMOTE == hdev->product) {
 168                if (hdev->rsize == 184) {
 169                        /* disable hidinput, force hiddev */
 170                        cmask = (cmask & ~HID_CONNECT_HIDINPUT) |
 171                                HID_CONNECT_HIDDEV_FORCE;
 172                }
 173        }
 174
 175        ret = hid_hw_start(hdev, cmask);
 176        if (ret) {
 177                hid_err(hdev, "hw start failed\n");
 178                goto err_free;
 179        }
 180
 181        return 0;
 182err_free:
 183        return ret;
 184}
 185
 186static const struct hid_device_id samsung_devices[] = {
 187        { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
 188        { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE) },
 189        { }
 190};
 191MODULE_DEVICE_TABLE(hid, samsung_devices);
 192
 193static struct hid_driver samsung_driver = {
 194        .name = "samsung",
 195        .id_table = samsung_devices,
 196        .report_fixup = samsung_report_fixup,
 197        .input_mapping = samsung_input_mapping,
 198        .probe = samsung_probe,
 199};
 200
 201static int __init samsung_init(void)
 202{
 203        return hid_register_driver(&samsung_driver);
 204}
 205
 206static void __exit samsung_exit(void)
 207{
 208        hid_unregister_driver(&samsung_driver);
 209}
 210
 211module_init(samsung_init);
 212module_exit(samsung_exit);
 213MODULE_LICENSE("GPL");
 214
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