fbmem: don't allow too huge resolutions
[linux-2.6-microblaze.git] / drivers / hid / hid-zydacron.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 *  HID driver for zydacron remote control
4 *
5 *  Copyright (c) 2010 Don Prince <dhprince.devel@yahoo.co.uk>
6 */
7
8 /*
9 */
10
11 #include <linux/device.h>
12 #include <linux/hid.h>
13 #include <linux/module.h>
14
15 #include "hid-ids.h"
16
17 struct zc_device {
18         struct input_dev        *input_ep81;
19         unsigned short          last_key[4];
20 };
21
22
23 /*
24 * Zydacron remote control has an invalid HID report descriptor,
25 * that needs fixing before we can parse it.
26 */
27 static __u8 *zc_report_fixup(struct hid_device *hdev, __u8 *rdesc,
28         unsigned int *rsize)
29 {
30         if (*rsize >= 253 &&
31                 rdesc[0x96] == 0xbc && rdesc[0x97] == 0xff &&
32                 rdesc[0xca] == 0xbc && rdesc[0xcb] == 0xff &&
33                 rdesc[0xe1] == 0xbc && rdesc[0xe2] == 0xff) {
34                         hid_info(hdev,
35                                 "fixing up zydacron remote control report descriptor\n");
36                         rdesc[0x96] = rdesc[0xca] = rdesc[0xe1] = 0x0c;
37                         rdesc[0x97] = rdesc[0xcb] = rdesc[0xe2] = 0x00;
38                 }
39         return rdesc;
40 }
41
42 #define zc_map_key_clear(c) \
43         hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c))
44
45 static int zc_input_mapping(struct hid_device *hdev, struct hid_input *hi,
46         struct hid_field *field, struct hid_usage *usage,
47         unsigned long **bit, int *max)
48 {
49         int i;
50         struct zc_device *zc = hid_get_drvdata(hdev);
51         zc->input_ep81 = hi->input;
52
53         if ((usage->hid & HID_USAGE_PAGE) != HID_UP_CONSUMER)
54                 return 0;
55
56         dbg_hid("zynacron input mapping event [0x%x]\n",
57                 usage->hid & HID_USAGE);
58
59         switch (usage->hid & HID_USAGE) {
60         /* report 2 */
61         case 0x10:
62                 zc_map_key_clear(KEY_MODE);
63                 break;
64         case 0x30:
65                 zc_map_key_clear(KEY_SCREEN);
66                 break;
67         case 0x70:
68                 zc_map_key_clear(KEY_INFO);
69                 break;
70         /* report 3 */
71         case 0x04:
72                 zc_map_key_clear(KEY_RADIO);
73                 break;
74         /* report 4 */
75         case 0x0d:
76                 zc_map_key_clear(KEY_PVR);
77                 break;
78         case 0x25:
79                 zc_map_key_clear(KEY_TV);
80                 break;
81         case 0x47:
82                 zc_map_key_clear(KEY_AUDIO);
83                 break;
84         case 0x49:
85                 zc_map_key_clear(KEY_AUX);
86                 break;
87         case 0x4a:
88                 zc_map_key_clear(KEY_VIDEO);
89                 break;
90         case 0x48:
91                 zc_map_key_clear(KEY_DVD);
92                 break;
93         case 0x24:
94                 zc_map_key_clear(KEY_MENU);
95                 break;
96         case 0x32:
97                 zc_map_key_clear(KEY_TEXT);
98                 break;
99         default:
100                 return 0;
101         }
102
103         for (i = 0; i < 4; i++)
104                 zc->last_key[i] = 0;
105
106         return 1;
107 }
108
109 static int zc_raw_event(struct hid_device *hdev, struct hid_report *report,
110          u8 *data, int size)
111 {
112         struct zc_device *zc = hid_get_drvdata(hdev);
113         int ret = 0;
114         unsigned key;
115         unsigned short index;
116
117         if (report->id == data[0]) {
118
119                 /* break keys */
120                 for (index = 0; index < 4; index++) {
121                         key = zc->last_key[index];
122                         if (key) {
123                                 input_event(zc->input_ep81, EV_KEY, key, 0);
124                                 zc->last_key[index] = 0;
125                         }
126                 }
127
128                 key = 0;
129                 switch (report->id) {
130                 case 0x02:
131                 case 0x03:
132                         switch (data[1]) {
133                         case 0x10:
134                                 key = KEY_MODE;
135                                 index = 0;
136                                 break;
137                         case 0x30:
138                                 key = KEY_SCREEN;
139                                 index = 1;
140                                 break;
141                         case 0x70:
142                                 key = KEY_INFO;
143                                 index = 2;
144                                 break;
145                         case 0x04:
146                                 key = KEY_RADIO;
147                                 index = 3;
148                                 break;
149                         }
150
151                         if (key) {
152                                 input_event(zc->input_ep81, EV_KEY, key, 1);
153                                 zc->last_key[index] = key;
154                         }
155
156                         ret = 1;
157                         break;
158                 }
159         }
160
161         return ret;
162 }
163
164 static int zc_probe(struct hid_device *hdev, const struct hid_device_id *id)
165 {
166         int ret;
167         struct zc_device *zc;
168
169         zc = devm_kzalloc(&hdev->dev, sizeof(*zc), GFP_KERNEL);
170         if (zc == NULL) {
171                 hid_err(hdev, "can't alloc descriptor\n");
172                 return -ENOMEM;
173         }
174
175         hid_set_drvdata(hdev, zc);
176
177         ret = hid_parse(hdev);
178         if (ret) {
179                 hid_err(hdev, "parse failed\n");
180                 return ret;
181         }
182
183         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
184         if (ret) {
185                 hid_err(hdev, "hw start failed\n");
186                 return ret;
187         }
188
189         return 0;
190 }
191
192 static const struct hid_device_id zc_devices[] = {
193         { HID_USB_DEVICE(USB_VENDOR_ID_ZYDACRON, USB_DEVICE_ID_ZYDACRON_REMOTE_CONTROL) },
194         { }
195 };
196 MODULE_DEVICE_TABLE(hid, zc_devices);
197
198 static struct hid_driver zc_driver = {
199         .name = "zydacron",
200         .id_table = zc_devices,
201         .report_fixup = zc_report_fixup,
202         .input_mapping = zc_input_mapping,
203         .raw_event = zc_raw_event,
204         .probe = zc_probe,
205 };
206 module_hid_driver(zc_driver);
207
208 MODULE_LICENSE("GPL");