1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * HID driver for some samsung "special" devices |
4 | * |
5 | * Copyright (c) 1999 Andreas Gal |
6 | * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> |
7 | * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc |
8 | * Copyright (c) 2006-2007 Jiri Kosina |
9 | * Copyright (c) 2008 Jiri Slaby |
10 | * Copyright (c) 2010 Don Prince <dhprince.devel@yahoo.co.uk> |
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 | |
25 | #include <linux/device.h> |
26 | #include <linux/usb.h> |
27 | #include <linux/hid.h> |
28 | #include <linux/module.h> |
29 | |
30 | #include "hid-ids.h" |
31 | |
32 | /* |
33 | * There are several variants for 0419:0001: |
34 | * |
35 | * 1. 184 byte report descriptor |
36 | * Vendor specific report #4 has a size of 48 bit, |
37 | * and therefore is not accepted when inspecting the descriptors. |
38 | * As a workaround we reinterpret the report as: |
39 | * Variable type, count 6, size 8 bit, log. maximum 255 |
40 | * The burden to reconstruct the data is moved into user space. |
41 | * |
42 | * 2. 203 byte report descriptor |
43 | * Report #4 has an array field with logical range 0..18 instead of 1..15. |
44 | * |
45 | * 3. 135 byte report descriptor |
46 | * Report #4 has an array field with logical range 0..17 instead of 1..14. |
47 | * |
48 | * 4. 171 byte report descriptor |
49 | * Report #3 has an array field with logical range 0..1 instead of 1..3. |
50 | */ |
51 | static inline void samsung_irda_dev_trace(struct hid_device *hdev, |
52 | unsigned int rsize) |
53 | { |
54 | hid_info(hdev, "fixing up Samsung IrDA %d byte report descriptor\n" , |
55 | rsize); |
56 | } |
57 | |
58 | static __u8 *samsung_irda_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
59 | unsigned int *rsize) |
60 | { |
61 | if (*rsize == 184 && rdesc[175] == 0x25 && rdesc[176] == 0x40 && |
62 | rdesc[177] == 0x75 && rdesc[178] == 0x30 && |
63 | rdesc[179] == 0x95 && rdesc[180] == 0x01 && |
64 | rdesc[182] == 0x40) { |
65 | samsung_irda_dev_trace(hdev, rsize: 184); |
66 | rdesc[176] = 0xff; |
67 | rdesc[178] = 0x08; |
68 | rdesc[180] = 0x06; |
69 | rdesc[182] = 0x42; |
70 | } else |
71 | if (*rsize == 203 && rdesc[192] == 0x15 && rdesc[193] == 0x0 && |
72 | rdesc[194] == 0x25 && rdesc[195] == 0x12) { |
73 | samsung_irda_dev_trace(hdev, rsize: 203); |
74 | rdesc[193] = 0x1; |
75 | rdesc[195] = 0xf; |
76 | } else |
77 | if (*rsize == 135 && rdesc[124] == 0x15 && rdesc[125] == 0x0 && |
78 | rdesc[126] == 0x25 && rdesc[127] == 0x11) { |
79 | samsung_irda_dev_trace(hdev, rsize: 135); |
80 | rdesc[125] = 0x1; |
81 | rdesc[127] = 0xe; |
82 | } else |
83 | if (*rsize == 171 && rdesc[160] == 0x15 && rdesc[161] == 0x0 && |
84 | rdesc[162] == 0x25 && rdesc[163] == 0x01) { |
85 | samsung_irda_dev_trace(hdev, rsize: 171); |
86 | rdesc[161] = 0x1; |
87 | rdesc[163] = 0x3; |
88 | } |
89 | return rdesc; |
90 | } |
91 | |
92 | #define samsung_kbd_mouse_map_key_clear(c) \ |
93 | hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c)) |
94 | |
95 | static int samsung_kbd_mouse_input_mapping(struct hid_device *hdev, |
96 | struct hid_input *hi, struct hid_field *field, struct hid_usage *usage, |
97 | unsigned long **bit, int *max) |
98 | { |
99 | struct usb_interface *intf = to_usb_interface(hdev->dev.parent); |
100 | unsigned short ifnum = intf->cur_altsetting->desc.bInterfaceNumber; |
101 | |
102 | if (1 != ifnum || HID_UP_CONSUMER != (usage->hid & HID_USAGE_PAGE)) |
103 | return 0; |
104 | |
105 | dbg_hid("samsung wireless keyboard/mouse input mapping event [0x%x]\n" , |
106 | usage->hid & HID_USAGE); |
107 | |
108 | switch (usage->hid & HID_USAGE) { |
109 | /* report 2 */ |
110 | case 0x183: samsung_kbd_mouse_map_key_clear(KEY_MEDIA); break; |
111 | case 0x195: samsung_kbd_mouse_map_key_clear(KEY_EMAIL); break; |
112 | case 0x196: samsung_kbd_mouse_map_key_clear(KEY_CALC); break; |
113 | case 0x197: samsung_kbd_mouse_map_key_clear(KEY_COMPUTER); break; |
114 | case 0x22b: samsung_kbd_mouse_map_key_clear(KEY_SEARCH); break; |
115 | case 0x22c: samsung_kbd_mouse_map_key_clear(KEY_WWW); break; |
116 | case 0x22d: samsung_kbd_mouse_map_key_clear(KEY_BACK); break; |
117 | case 0x22e: samsung_kbd_mouse_map_key_clear(KEY_FORWARD); break; |
118 | case 0x22f: samsung_kbd_mouse_map_key_clear(KEY_FAVORITES); break; |
119 | case 0x230: samsung_kbd_mouse_map_key_clear(KEY_REFRESH); break; |
120 | case 0x231: samsung_kbd_mouse_map_key_clear(KEY_STOP); break; |
121 | default: |
122 | return 0; |
123 | } |
124 | |
125 | return 1; |
126 | } |
127 | |
128 | static __u8 *samsung_report_fixup(struct hid_device *hdev, __u8 *rdesc, |
129 | unsigned int *rsize) |
130 | { |
131 | if (USB_DEVICE_ID_SAMSUNG_IR_REMOTE == hdev->product) |
132 | rdesc = samsung_irda_report_fixup(hdev, rdesc, rsize); |
133 | return rdesc; |
134 | } |
135 | |
136 | static int samsung_input_mapping(struct hid_device *hdev, struct hid_input *hi, |
137 | struct hid_field *field, struct hid_usage *usage, |
138 | unsigned long **bit, int *max) |
139 | { |
140 | int ret = 0; |
141 | |
142 | if (USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE == hdev->product) |
143 | ret = samsung_kbd_mouse_input_mapping(hdev, |
144 | hi, field, usage, bit, max); |
145 | |
146 | return ret; |
147 | } |
148 | |
149 | static int samsung_probe(struct hid_device *hdev, |
150 | const struct hid_device_id *id) |
151 | { |
152 | int ret; |
153 | unsigned int cmask = HID_CONNECT_DEFAULT; |
154 | |
155 | if (!hid_is_usb(hdev)) |
156 | return -EINVAL; |
157 | |
158 | ret = hid_parse(hdev); |
159 | if (ret) { |
160 | hid_err(hdev, "parse failed\n" ); |
161 | goto err_free; |
162 | } |
163 | |
164 | if (USB_DEVICE_ID_SAMSUNG_IR_REMOTE == hdev->product) { |
165 | if (hdev->rsize == 184) { |
166 | /* disable hidinput, force hiddev */ |
167 | cmask = (cmask & ~HID_CONNECT_HIDINPUT) | |
168 | HID_CONNECT_HIDDEV_FORCE; |
169 | } |
170 | } |
171 | |
172 | ret = hid_hw_start(hdev, connect_mask: cmask); |
173 | if (ret) { |
174 | hid_err(hdev, "hw start failed\n" ); |
175 | goto err_free; |
176 | } |
177 | |
178 | return 0; |
179 | err_free: |
180 | return ret; |
181 | } |
182 | |
183 | static const struct hid_device_id samsung_devices[] = { |
184 | { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_IR_REMOTE) }, |
185 | { HID_USB_DEVICE(USB_VENDOR_ID_SAMSUNG, USB_DEVICE_ID_SAMSUNG_WIRELESS_KBD_MOUSE) }, |
186 | { } |
187 | }; |
188 | MODULE_DEVICE_TABLE(hid, samsung_devices); |
189 | |
190 | static struct hid_driver samsung_driver = { |
191 | .name = "samsung" , |
192 | .id_table = samsung_devices, |
193 | .report_fixup = samsung_report_fixup, |
194 | .input_mapping = samsung_input_mapping, |
195 | .probe = samsung_probe, |
196 | }; |
197 | module_hid_driver(samsung_driver); |
198 | |
199 | MODULE_LICENSE("GPL" ); |
200 | |