Commit | Line | Data |
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980a3da6 JS |
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 | */ | |
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 | * | |
0810b511 RS |
28 | * There are several variants for 0419:0001: |
29 | * | |
30 | * 1. 184 byte report descriptor | |
980a3da6 JS |
31 | * 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. | |
0810b511 RS |
36 | * |
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. | |
980a3da6 JS |
42 | */ |
43 | static void samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc, | |
44 | unsigned int rsize) | |
45 | { | |
0810b511 | 46 | if (rsize == 184 && rdesc[175] == 0x25 && rdesc[176] == 0x40 && |
980a3da6 JS |
47 | rdesc[177] == 0x75 && rdesc[178] == 0x30 && |
48 | rdesc[179] == 0x95 && rdesc[180] == 0x01 && | |
49 | rdesc[182] == 0x40) { | |
0810b511 RS |
50 | dev_info(&hdev->dev, "fixing up Samsung IrDA %d byte report " |
51 | "descriptor\n", 184); | |
980a3da6 JS |
52 | rdesc[176] = 0xff; |
53 | rdesc[178] = 0x08; | |
54 | rdesc[180] = 0x06; | |
55 | rdesc[182] = 0x42; | |
0810b511 RS |
56 | } 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; | |
980a3da6 JS |
70 | } |
71 | } | |
72 | ||
73 | static int samsung_probe(struct hid_device *hdev, | |
74 | const struct hid_device_id *id) | |
75 | { | |
76 | int ret; | |
0810b511 | 77 | unsigned int cmask = HID_CONNECT_DEFAULT; |
980a3da6 | 78 | |
980a3da6 JS |
79 | ret = hid_parse(hdev); |
80 | if (ret) { | |
81 | dev_err(&hdev->dev, "parse failed\n"); | |
82 | goto err_free; | |
83 | } | |
84 | ||
0810b511 RS |
85 | 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); | |
980a3da6 JS |
92 | if (ret) { |
93 | dev_err(&hdev->dev, "hw start failed\n"); | |
94 | goto err_free; | |
95 | } | |
96 | ||
97 | return 0; | |
98 | err_free: | |
99 | return ret; | |
100 | } | |
101 | ||
102 | static const struct hid_device_id samsung_devices[] = { | |
103 | { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) }, | |
104 | { } | |
105 | }; | |
106 | MODULE_DEVICE_TABLE(hid, samsung_devices); | |
107 | ||
108 | static 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 | ||
a24f423b | 115 | static int __init samsung_init(void) |
980a3da6 JS |
116 | { |
117 | return hid_register_driver(&samsung_driver); | |
118 | } | |
119 | ||
a24f423b | 120 | static void __exit samsung_exit(void) |
980a3da6 JS |
121 | { |
122 | hid_unregister_driver(&samsung_driver); | |
123 | } | |
124 | ||
125 | module_init(samsung_init); | |
126 | module_exit(samsung_exit); | |
127 | MODULE_LICENSE("GPL"); |