blob: 5b222eed06929806f76b3896a0b23ae471120d25 [file] [log] [blame]
Jiri Slaby980a3da2008-06-25 22:31:48 +02001/*
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 */
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/hid.h>
21#include <linux/module.h>
22
23#include "hid-ids.h"
24
25/*
26 * Samsung IrDA remote controller (reports as Cypress USB Mouse).
27 *
Robert Schedel0810b512009-06-23 11:26:48 +020028 * There are several variants for 0419:0001:
29 *
30 * 1. 184 byte report descriptor
Jiri Slaby980a3da2008-06-25 22:31:48 +020031 * Vendor specific report #4 has a size of 48 bit,
32 * and therefore is not accepted when inspecting the descriptors.
33 * As a workaround we reinterpret the report as:
34 * Variable type, count 6, size 8 bit, log. maximum 255
35 * The burden to reconstruct the data is moved into user space.
Robert Schedel0810b512009-06-23 11:26:48 +020036 *
37 * 2. 203 byte report descriptor
38 * Report #4 has an array field with logical range 0..18 instead of 1..15.
39 *
40 * 3. 135 byte report descriptor
41 * Report #4 has an array field with logical range 0..17 instead of 1..14.
Jiri Slaby980a3da2008-06-25 22:31:48 +020042 */
43static void samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc,
44 unsigned int rsize)
45{
Robert Schedel0810b512009-06-23 11:26:48 +020046 if (rsize == 184 && rdesc[175] == 0x25 && rdesc[176] == 0x40 &&
Jiri Slaby980a3da2008-06-25 22:31:48 +020047 rdesc[177] == 0x75 && rdesc[178] == 0x30 &&
48 rdesc[179] == 0x95 && rdesc[180] == 0x01 &&
49 rdesc[182] == 0x40) {
Robert Schedel0810b512009-06-23 11:26:48 +020050 dev_info(&hdev->dev, "fixing up Samsung IrDA %d byte report "
51 "descriptor\n", 184);
Jiri Slaby980a3da2008-06-25 22:31:48 +020052 rdesc[176] = 0xff;
53 rdesc[178] = 0x08;
54 rdesc[180] = 0x06;
55 rdesc[182] = 0x42;
Robert Schedel0810b512009-06-23 11:26:48 +020056 } else
57 if (rsize == 203 && rdesc[192] == 0x15 && rdesc[193] == 0x0 &&
58 rdesc[194] == 0x25 && rdesc[195] == 0x12) {
59 dev_info(&hdev->dev, "fixing up Samsung IrDA %d byte report "
60 "descriptor\n", 203);
61 rdesc[193] = 0x1;
62 rdesc[195] = 0xf;
63 } else
64 if (rsize == 135 && rdesc[124] == 0x15 && rdesc[125] == 0x0 &&
65 rdesc[126] == 0x25 && rdesc[127] == 0x11) {
66 dev_info(&hdev->dev, "fixing up Samsung IrDA %d byte report "
67 "descriptor\n", 135);
68 rdesc[125] = 0x1;
69 rdesc[127] = 0xe;
Jiri Slaby980a3da2008-06-25 22:31:48 +020070 }
71}
72
73static int samsung_probe(struct hid_device *hdev,
74 const struct hid_device_id *id)
75{
76 int ret;
Robert Schedel0810b512009-06-23 11:26:48 +020077 unsigned int cmask = HID_CONNECT_DEFAULT;
Jiri Slaby980a3da2008-06-25 22:31:48 +020078
Jiri Slaby980a3da2008-06-25 22:31:48 +020079 ret = hid_parse(hdev);
80 if (ret) {
81 dev_err(&hdev->dev, "parse failed\n");
82 goto err_free;
83 }
84
Robert Schedel0810b512009-06-23 11:26:48 +020085 if (hdev->rsize == 184) {
86 /* disable hidinput, force hiddev */
87 cmask = (cmask & ~HID_CONNECT_HIDINPUT) |
88 HID_CONNECT_HIDDEV_FORCE;
89 }
90
91 ret = hid_hw_start(hdev, cmask);
Jiri Slaby980a3da2008-06-25 22:31:48 +020092 if (ret) {
93 dev_err(&hdev->dev, "hw start failed\n");
94 goto err_free;
95 }
96
97 return 0;
98err_free:
99 return ret;
100}
101
102static const struct hid_device_id samsung_devices[] = {
103 { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) },
104 { }
105};
106MODULE_DEVICE_TABLE(hid, samsung_devices);
107
108static struct hid_driver samsung_driver = {
109 .name = "samsung",
110 .id_table = samsung_devices,
111 .report_fixup = samsung_report_fixup,
112 .probe = samsung_probe,
113};
114
Peter Huewea24f423b2009-07-02 19:08:38 +0200115static int __init samsung_init(void)
Jiri Slaby980a3da2008-06-25 22:31:48 +0200116{
117 return hid_register_driver(&samsung_driver);
118}
119
Peter Huewea24f423b2009-07-02 19:08:38 +0200120static void __exit samsung_exit(void)
Jiri Slaby980a3da2008-06-25 22:31:48 +0200121{
122 hid_unregister_driver(&samsung_driver);
123}
124
125module_init(samsung_init);
126module_exit(samsung_exit);
127MODULE_LICENSE("GPL");