Commit | Line | Data |
---|---|---|
d56410e0 | 1 | /* |
1da177e4 LT |
2 | * bt856 - BT856A Digital Video Encoder (Rockwell Part) |
3 | * | |
4 | * Copyright (C) 1999 Mike Bernson <mike@mlb.org> | |
5 | * Copyright (C) 1998 Dave Perks <dperks@ibm.net> | |
6 | * | |
7 | * Modifications for LML33/DC10plus unified driver | |
8 | * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx> | |
9 | * | |
10 | * This code was modify/ported from the saa7111 driver written | |
11 | * by Dave Perks. | |
12 | * | |
13 | * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net> | |
14 | * - moved over to linux>=2.4.x i2c protocol (9/9/2002) | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or modify | |
17 | * it under the terms of the GNU General Public License as published by | |
18 | * the Free Software Foundation; either version 2 of the License, or | |
19 | * (at your option) any later version. | |
20 | * | |
21 | * This program is distributed in the hope that it will be useful, | |
22 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
24 | * GNU General Public License for more details. | |
25 | * | |
26 | * You should have received a copy of the GNU General Public License | |
27 | * along with this program; if not, write to the Free Software | |
28 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
29 | */ | |
30 | ||
31 | #include <linux/module.h> | |
18f3fa1e | 32 | #include <linux/types.h> |
5a0e3ad6 | 33 | #include <linux/slab.h> |
a8c26dfe | 34 | #include <linux/ioctl.h> |
18f3fa1e | 35 | #include <asm/uaccess.h> |
a8c26dfe | 36 | #include <linux/i2c.h> |
a91f56e7 HV |
37 | #include <linux/videodev2.h> |
38 | #include <media/v4l2-device.h> | |
1da177e4 LT |
39 | |
40 | MODULE_DESCRIPTION("Brooktree-856A video encoder driver"); | |
41 | MODULE_AUTHOR("Mike Bernson & Dave Perks"); | |
42 | MODULE_LICENSE("GPL"); | |
43 | ||
ff699e6b | 44 | static int debug; |
1da177e4 LT |
45 | module_param(debug, int, 0); |
46 | MODULE_PARM_DESC(debug, "Debug level (0-1)"); | |
47 | ||
a91f56e7 | 48 | |
1da177e4 LT |
49 | /* ----------------------------------------------------------------------- */ |
50 | ||
187565c4 HV |
51 | #define BT856_REG_OFFSET 0xDA |
52 | #define BT856_NR_REG 6 | |
1da177e4 LT |
53 | |
54 | struct bt856 { | |
a91f56e7 | 55 | struct v4l2_subdev sd; |
f49a5eae | 56 | unsigned char reg[BT856_NR_REG]; |
1da177e4 | 57 | |
107063c6 | 58 | v4l2_std_id norm; |
1da177e4 LT |
59 | }; |
60 | ||
a91f56e7 HV |
61 | static inline struct bt856 *to_bt856(struct v4l2_subdev *sd) |
62 | { | |
63 | return container_of(sd, struct bt856, sd); | |
64 | } | |
65 | ||
1da177e4 LT |
66 | /* ----------------------------------------------------------------------- */ |
67 | ||
a91f56e7 | 68 | static inline int bt856_write(struct bt856 *encoder, u8 reg, u8 value) |
1da177e4 | 69 | { |
a91f56e7 | 70 | struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd); |
1da177e4 | 71 | |
187565c4 | 72 | encoder->reg[reg - BT856_REG_OFFSET] = value; |
1da177e4 LT |
73 | return i2c_smbus_write_byte_data(client, reg, value); |
74 | } | |
75 | ||
a91f56e7 | 76 | static inline int bt856_setbit(struct bt856 *encoder, u8 reg, u8 bit, u8 value) |
1da177e4 | 77 | { |
a91f56e7 | 78 | return bt856_write(encoder, reg, |
a8c26dfe HV |
79 | (encoder->reg[reg - BT856_REG_OFFSET] & ~(1 << bit)) | |
80 | (value ? (1 << bit) : 0)); | |
1da177e4 LT |
81 | } |
82 | ||
a91f56e7 | 83 | static void bt856_dump(struct bt856 *encoder) |
1da177e4 LT |
84 | { |
85 | int i; | |
1da177e4 | 86 | |
a91f56e7 | 87 | v4l2_info(&encoder->sd, "register dump:\n"); |
f49a5eae | 88 | for (i = 0; i < BT856_NR_REG; i += 2) |
a8c26dfe HV |
89 | printk(KERN_CONT " %02x", encoder->reg[i]); |
90 | printk(KERN_CONT "\n"); | |
1da177e4 LT |
91 | } |
92 | ||
93 | /* ----------------------------------------------------------------------- */ | |
94 | ||
a91f56e7 | 95 | static int bt856_init(struct v4l2_subdev *sd, u32 arg) |
1da177e4 | 96 | { |
a91f56e7 | 97 | struct bt856 *encoder = to_bt856(sd); |
1da177e4 | 98 | |
a91f56e7 HV |
99 | /* This is just for testing!!! */ |
100 | v4l2_dbg(1, debug, sd, "init\n"); | |
101 | bt856_write(encoder, 0xdc, 0x18); | |
102 | bt856_write(encoder, 0xda, 0); | |
103 | bt856_write(encoder, 0xde, 0); | |
1da177e4 | 104 | |
a91f56e7 HV |
105 | bt856_setbit(encoder, 0xdc, 3, 1); |
106 | /*bt856_setbit(encoder, 0xdc, 6, 0);*/ | |
107 | bt856_setbit(encoder, 0xdc, 4, 1); | |
108 | ||
109 | if (encoder->norm & V4L2_STD_NTSC) | |
110 | bt856_setbit(encoder, 0xdc, 2, 0); | |
111 | else | |
112 | bt856_setbit(encoder, 0xdc, 2, 1); | |
113 | ||
114 | bt856_setbit(encoder, 0xdc, 1, 1); | |
115 | bt856_setbit(encoder, 0xde, 4, 0); | |
116 | bt856_setbit(encoder, 0xde, 3, 1); | |
117 | if (debug != 0) | |
118 | bt856_dump(encoder); | |
119 | return 0; | |
120 | } | |
121 | ||
122 | static int bt856_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) | |
123 | { | |
124 | struct bt856 *encoder = to_bt856(sd); | |
125 | ||
cc5cef8e | 126 | v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std); |
a91f56e7 HV |
127 | |
128 | if (std & V4L2_STD_NTSC) { | |
129 | bt856_setbit(encoder, 0xdc, 2, 0); | |
130 | } else if (std & V4L2_STD_PAL) { | |
131 | bt856_setbit(encoder, 0xdc, 2, 1); | |
132 | bt856_setbit(encoder, 0xda, 0, 0); | |
133 | /*bt856_setbit(encoder, 0xda, 0, 1);*/ | |
134 | } else { | |
135 | return -EINVAL; | |
a8c26dfe | 136 | } |
a91f56e7 HV |
137 | encoder->norm = std; |
138 | if (debug != 0) | |
139 | bt856_dump(encoder); | |
140 | return 0; | |
141 | } | |
1da177e4 | 142 | |
5325b427 HV |
143 | static int bt856_s_routing(struct v4l2_subdev *sd, |
144 | u32 input, u32 output, u32 config) | |
a91f56e7 HV |
145 | { |
146 | struct bt856 *encoder = to_bt856(sd); | |
147 | ||
5325b427 | 148 | v4l2_dbg(1, debug, sd, "set input %d\n", input); |
a91f56e7 HV |
149 | |
150 | /* We only have video bus. | |
5325b427 HV |
151 | * input= 0: input is from bt819 |
152 | * input= 1: input is from ZR36060 */ | |
153 | switch (input) { | |
a91f56e7 HV |
154 | case 0: |
155 | bt856_setbit(encoder, 0xde, 4, 0); | |
156 | bt856_setbit(encoder, 0xde, 3, 1); | |
157 | bt856_setbit(encoder, 0xdc, 3, 1); | |
158 | bt856_setbit(encoder, 0xdc, 6, 0); | |
159 | break; | |
160 | case 1: | |
161 | bt856_setbit(encoder, 0xde, 4, 0); | |
162 | bt856_setbit(encoder, 0xde, 3, 1); | |
163 | bt856_setbit(encoder, 0xdc, 3, 1); | |
164 | bt856_setbit(encoder, 0xdc, 6, 1); | |
165 | break; | |
166 | case 2: /* Color bar */ | |
167 | bt856_setbit(encoder, 0xdc, 3, 0); | |
168 | bt856_setbit(encoder, 0xde, 4, 1); | |
169 | break; | |
1da177e4 LT |
170 | default: |
171 | return -EINVAL; | |
172 | } | |
173 | ||
a91f56e7 HV |
174 | if (debug != 0) |
175 | bt856_dump(encoder); | |
1da177e4 LT |
176 | return 0; |
177 | } | |
178 | ||
179 | /* ----------------------------------------------------------------------- */ | |
180 | ||
a91f56e7 | 181 | static const struct v4l2_subdev_core_ops bt856_core_ops = { |
a91f56e7 HV |
182 | .init = bt856_init, |
183 | }; | |
1da177e4 | 184 | |
a91f56e7 HV |
185 | static const struct v4l2_subdev_video_ops bt856_video_ops = { |
186 | .s_std_output = bt856_s_std_output, | |
187 | .s_routing = bt856_s_routing, | |
188 | }; | |
189 | ||
190 | static const struct v4l2_subdev_ops bt856_ops = { | |
191 | .core = &bt856_core_ops, | |
192 | .video = &bt856_video_ops, | |
193 | }; | |
194 | ||
195 | /* ----------------------------------------------------------------------- */ | |
1da177e4 | 196 | |
a8c26dfe HV |
197 | static int bt856_probe(struct i2c_client *client, |
198 | const struct i2c_device_id *id) | |
1da177e4 | 199 | { |
1da177e4 | 200 | struct bt856 *encoder; |
a91f56e7 | 201 | struct v4l2_subdev *sd; |
1da177e4 | 202 | |
1da177e4 | 203 | /* Check if the adapter supports the needed features */ |
a8c26dfe HV |
204 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
205 | return -ENODEV; | |
1da177e4 | 206 | |
a8c26dfe HV |
207 | v4l_info(client, "chip found @ 0x%x (%s)\n", |
208 | client->addr << 1, client->adapter->name); | |
1da177e4 | 209 | |
c02b211d | 210 | encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL); |
a8c26dfe | 211 | if (encoder == NULL) |
1da177e4 | 212 | return -ENOMEM; |
a91f56e7 HV |
213 | sd = &encoder->sd; |
214 | v4l2_i2c_subdev_init(sd, client, &bt856_ops); | |
107063c6 | 215 | encoder->norm = V4L2_STD_NTSC; |
1da177e4 | 216 | |
a91f56e7 HV |
217 | bt856_write(encoder, 0xdc, 0x18); |
218 | bt856_write(encoder, 0xda, 0); | |
219 | bt856_write(encoder, 0xde, 0); | |
1da177e4 | 220 | |
a91f56e7 HV |
221 | bt856_setbit(encoder, 0xdc, 3, 1); |
222 | /*bt856_setbit(encoder, 0xdc, 6, 0);*/ | |
223 | bt856_setbit(encoder, 0xdc, 4, 1); | |
1da177e4 | 224 | |
107063c6 | 225 | if (encoder->norm & V4L2_STD_NTSC) |
a91f56e7 | 226 | bt856_setbit(encoder, 0xdc, 2, 0); |
107063c6 | 227 | else |
a91f56e7 | 228 | bt856_setbit(encoder, 0xdc, 2, 1); |
1da177e4 | 229 | |
a91f56e7 HV |
230 | bt856_setbit(encoder, 0xdc, 1, 1); |
231 | bt856_setbit(encoder, 0xde, 4, 0); | |
232 | bt856_setbit(encoder, 0xde, 3, 1); | |
1da177e4 LT |
233 | |
234 | if (debug != 0) | |
a91f56e7 | 235 | bt856_dump(encoder); |
1da177e4 LT |
236 | return 0; |
237 | } | |
238 | ||
a8c26dfe | 239 | static int bt856_remove(struct i2c_client *client) |
1da177e4 | 240 | { |
a91f56e7 HV |
241 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
242 | ||
243 | v4l2_device_unregister_subdev(sd); | |
1da177e4 LT |
244 | return 0; |
245 | } | |
246 | ||
a8c26dfe HV |
247 | static const struct i2c_device_id bt856_id[] = { |
248 | { "bt856", 0 }, | |
249 | { } | |
250 | }; | |
251 | MODULE_DEVICE_TABLE(i2c, bt856_id); | |
1da177e4 | 252 | |
3f417200 HV |
253 | static struct i2c_driver bt856_driver = { |
254 | .driver = { | |
255 | .owner = THIS_MODULE, | |
256 | .name = "bt856", | |
257 | }, | |
258 | .probe = bt856_probe, | |
259 | .remove = bt856_remove, | |
260 | .id_table = bt856_id, | |
1da177e4 | 261 | }; |
3f417200 | 262 | |
c6e8d86f | 263 | module_i2c_driver(bt856_driver); |