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Commit | Line | Data |
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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
d56410e0 | 2 | /* |
1da177e4 LT |
3 | * bt856 - BT856A Digital Video Encoder (Rockwell Part) |
4 | * | |
5 | * Copyright (C) 1999 Mike Bernson <mike@mlb.org> | |
6 | * Copyright (C) 1998 Dave Perks <dperks@ibm.net> | |
7 | * | |
8 | * Modifications for LML33/DC10plus unified driver | |
9 | * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx> | |
10 | * | |
11 | * This code was modify/ported from the saa7111 driver written | |
12 | * by Dave Perks. | |
13 | * | |
14 | * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net> | |
15 | * - moved over to linux>=2.4.x i2c protocol (9/9/2002) | |
1da177e4 LT |
16 | */ |
17 | ||
18 | #include <linux/module.h> | |
18f3fa1e | 19 | #include <linux/types.h> |
5a0e3ad6 | 20 | #include <linux/slab.h> |
a8c26dfe | 21 | #include <linux/ioctl.h> |
7c0f6ba6 | 22 | #include <linux/uaccess.h> |
a8c26dfe | 23 | #include <linux/i2c.h> |
a91f56e7 HV |
24 | #include <linux/videodev2.h> |
25 | #include <media/v4l2-device.h> | |
1da177e4 LT |
26 | |
27 | MODULE_DESCRIPTION("Brooktree-856A video encoder driver"); | |
28 | MODULE_AUTHOR("Mike Bernson & Dave Perks"); | |
29 | MODULE_LICENSE("GPL"); | |
30 | ||
ff699e6b | 31 | static int debug; |
1da177e4 LT |
32 | module_param(debug, int, 0); |
33 | MODULE_PARM_DESC(debug, "Debug level (0-1)"); | |
34 | ||
a91f56e7 | 35 | |
1da177e4 LT |
36 | /* ----------------------------------------------------------------------- */ |
37 | ||
187565c4 HV |
38 | #define BT856_REG_OFFSET 0xDA |
39 | #define BT856_NR_REG 6 | |
1da177e4 LT |
40 | |
41 | struct bt856 { | |
a91f56e7 | 42 | struct v4l2_subdev sd; |
f49a5eae | 43 | unsigned char reg[BT856_NR_REG]; |
1da177e4 | 44 | |
107063c6 | 45 | v4l2_std_id norm; |
1da177e4 LT |
46 | }; |
47 | ||
a91f56e7 HV |
48 | static inline struct bt856 *to_bt856(struct v4l2_subdev *sd) |
49 | { | |
50 | return container_of(sd, struct bt856, sd); | |
51 | } | |
52 | ||
1da177e4 LT |
53 | /* ----------------------------------------------------------------------- */ |
54 | ||
a91f56e7 | 55 | static inline int bt856_write(struct bt856 *encoder, u8 reg, u8 value) |
1da177e4 | 56 | { |
a91f56e7 | 57 | struct i2c_client *client = v4l2_get_subdevdata(&encoder->sd); |
1da177e4 | 58 | |
187565c4 | 59 | encoder->reg[reg - BT856_REG_OFFSET] = value; |
1da177e4 LT |
60 | return i2c_smbus_write_byte_data(client, reg, value); |
61 | } | |
62 | ||
a91f56e7 | 63 | static inline int bt856_setbit(struct bt856 *encoder, u8 reg, u8 bit, u8 value) |
1da177e4 | 64 | { |
a91f56e7 | 65 | return bt856_write(encoder, reg, |
a8c26dfe HV |
66 | (encoder->reg[reg - BT856_REG_OFFSET] & ~(1 << bit)) | |
67 | (value ? (1 << bit) : 0)); | |
1da177e4 LT |
68 | } |
69 | ||
a91f56e7 | 70 | static void bt856_dump(struct bt856 *encoder) |
1da177e4 LT |
71 | { |
72 | int i; | |
1da177e4 | 73 | |
a91f56e7 | 74 | v4l2_info(&encoder->sd, "register dump:\n"); |
f49a5eae | 75 | for (i = 0; i < BT856_NR_REG; i += 2) |
a8c26dfe HV |
76 | printk(KERN_CONT " %02x", encoder->reg[i]); |
77 | printk(KERN_CONT "\n"); | |
1da177e4 LT |
78 | } |
79 | ||
80 | /* ----------------------------------------------------------------------- */ | |
81 | ||
a91f56e7 | 82 | static int bt856_init(struct v4l2_subdev *sd, u32 arg) |
1da177e4 | 83 | { |
a91f56e7 | 84 | struct bt856 *encoder = to_bt856(sd); |
1da177e4 | 85 | |
a91f56e7 HV |
86 | /* This is just for testing!!! */ |
87 | v4l2_dbg(1, debug, sd, "init\n"); | |
88 | bt856_write(encoder, 0xdc, 0x18); | |
89 | bt856_write(encoder, 0xda, 0); | |
90 | bt856_write(encoder, 0xde, 0); | |
1da177e4 | 91 | |
a91f56e7 HV |
92 | bt856_setbit(encoder, 0xdc, 3, 1); |
93 | /*bt856_setbit(encoder, 0xdc, 6, 0);*/ | |
94 | bt856_setbit(encoder, 0xdc, 4, 1); | |
95 | ||
96 | if (encoder->norm & V4L2_STD_NTSC) | |
97 | bt856_setbit(encoder, 0xdc, 2, 0); | |
98 | else | |
99 | bt856_setbit(encoder, 0xdc, 2, 1); | |
100 | ||
101 | bt856_setbit(encoder, 0xdc, 1, 1); | |
102 | bt856_setbit(encoder, 0xde, 4, 0); | |
103 | bt856_setbit(encoder, 0xde, 3, 1); | |
104 | if (debug != 0) | |
105 | bt856_dump(encoder); | |
106 | return 0; | |
107 | } | |
108 | ||
109 | static int bt856_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) | |
110 | { | |
111 | struct bt856 *encoder = to_bt856(sd); | |
112 | ||
cc5cef8e | 113 | v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std); |
a91f56e7 HV |
114 | |
115 | if (std & V4L2_STD_NTSC) { | |
116 | bt856_setbit(encoder, 0xdc, 2, 0); | |
117 | } else if (std & V4L2_STD_PAL) { | |
118 | bt856_setbit(encoder, 0xdc, 2, 1); | |
119 | bt856_setbit(encoder, 0xda, 0, 0); | |
120 | /*bt856_setbit(encoder, 0xda, 0, 1);*/ | |
121 | } else { | |
122 | return -EINVAL; | |
a8c26dfe | 123 | } |
a91f56e7 HV |
124 | encoder->norm = std; |
125 | if (debug != 0) | |
126 | bt856_dump(encoder); | |
127 | return 0; | |
128 | } | |
1da177e4 | 129 | |
5325b427 HV |
130 | static int bt856_s_routing(struct v4l2_subdev *sd, |
131 | u32 input, u32 output, u32 config) | |
a91f56e7 HV |
132 | { |
133 | struct bt856 *encoder = to_bt856(sd); | |
134 | ||
5325b427 | 135 | v4l2_dbg(1, debug, sd, "set input %d\n", input); |
a91f56e7 HV |
136 | |
137 | /* We only have video bus. | |
5325b427 HV |
138 | * input= 0: input is from bt819 |
139 | * input= 1: input is from ZR36060 */ | |
140 | switch (input) { | |
a91f56e7 HV |
141 | case 0: |
142 | bt856_setbit(encoder, 0xde, 4, 0); | |
143 | bt856_setbit(encoder, 0xde, 3, 1); | |
144 | bt856_setbit(encoder, 0xdc, 3, 1); | |
145 | bt856_setbit(encoder, 0xdc, 6, 0); | |
146 | break; | |
147 | case 1: | |
148 | bt856_setbit(encoder, 0xde, 4, 0); | |
149 | bt856_setbit(encoder, 0xde, 3, 1); | |
150 | bt856_setbit(encoder, 0xdc, 3, 1); | |
151 | bt856_setbit(encoder, 0xdc, 6, 1); | |
152 | break; | |
153 | case 2: /* Color bar */ | |
154 | bt856_setbit(encoder, 0xdc, 3, 0); | |
155 | bt856_setbit(encoder, 0xde, 4, 1); | |
156 | break; | |
1da177e4 LT |
157 | default: |
158 | return -EINVAL; | |
159 | } | |
160 | ||
a91f56e7 HV |
161 | if (debug != 0) |
162 | bt856_dump(encoder); | |
1da177e4 LT |
163 | return 0; |
164 | } | |
165 | ||
166 | /* ----------------------------------------------------------------------- */ | |
167 | ||
a91f56e7 | 168 | static const struct v4l2_subdev_core_ops bt856_core_ops = { |
a91f56e7 HV |
169 | .init = bt856_init, |
170 | }; | |
1da177e4 | 171 | |
a91f56e7 HV |
172 | static const struct v4l2_subdev_video_ops bt856_video_ops = { |
173 | .s_std_output = bt856_s_std_output, | |
174 | .s_routing = bt856_s_routing, | |
175 | }; | |
176 | ||
177 | static const struct v4l2_subdev_ops bt856_ops = { | |
178 | .core = &bt856_core_ops, | |
179 | .video = &bt856_video_ops, | |
180 | }; | |
181 | ||
182 | /* ----------------------------------------------------------------------- */ | |
1da177e4 | 183 | |
a8c26dfe HV |
184 | static int bt856_probe(struct i2c_client *client, |
185 | const struct i2c_device_id *id) | |
1da177e4 | 186 | { |
1da177e4 | 187 | struct bt856 *encoder; |
a91f56e7 | 188 | struct v4l2_subdev *sd; |
1da177e4 | 189 | |
1da177e4 | 190 | /* Check if the adapter supports the needed features */ |
a8c26dfe HV |
191 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
192 | return -ENODEV; | |
1da177e4 | 193 | |
a8c26dfe HV |
194 | v4l_info(client, "chip found @ 0x%x (%s)\n", |
195 | client->addr << 1, client->adapter->name); | |
1da177e4 | 196 | |
c02b211d | 197 | encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL); |
a8c26dfe | 198 | if (encoder == NULL) |
1da177e4 | 199 | return -ENOMEM; |
a91f56e7 HV |
200 | sd = &encoder->sd; |
201 | v4l2_i2c_subdev_init(sd, client, &bt856_ops); | |
107063c6 | 202 | encoder->norm = V4L2_STD_NTSC; |
1da177e4 | 203 | |
a91f56e7 HV |
204 | bt856_write(encoder, 0xdc, 0x18); |
205 | bt856_write(encoder, 0xda, 0); | |
206 | bt856_write(encoder, 0xde, 0); | |
1da177e4 | 207 | |
a91f56e7 HV |
208 | bt856_setbit(encoder, 0xdc, 3, 1); |
209 | /*bt856_setbit(encoder, 0xdc, 6, 0);*/ | |
210 | bt856_setbit(encoder, 0xdc, 4, 1); | |
1da177e4 | 211 | |
107063c6 | 212 | if (encoder->norm & V4L2_STD_NTSC) |
a91f56e7 | 213 | bt856_setbit(encoder, 0xdc, 2, 0); |
107063c6 | 214 | else |
a91f56e7 | 215 | bt856_setbit(encoder, 0xdc, 2, 1); |
1da177e4 | 216 | |
a91f56e7 HV |
217 | bt856_setbit(encoder, 0xdc, 1, 1); |
218 | bt856_setbit(encoder, 0xde, 4, 0); | |
219 | bt856_setbit(encoder, 0xde, 3, 1); | |
1da177e4 LT |
220 | |
221 | if (debug != 0) | |
a91f56e7 | 222 | bt856_dump(encoder); |
1da177e4 LT |
223 | return 0; |
224 | } | |
225 | ||
a8c26dfe | 226 | static int bt856_remove(struct i2c_client *client) |
1da177e4 | 227 | { |
a91f56e7 HV |
228 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
229 | ||
230 | v4l2_device_unregister_subdev(sd); | |
1da177e4 LT |
231 | return 0; |
232 | } | |
233 | ||
a8c26dfe HV |
234 | static const struct i2c_device_id bt856_id[] = { |
235 | { "bt856", 0 }, | |
236 | { } | |
237 | }; | |
238 | MODULE_DEVICE_TABLE(i2c, bt856_id); | |
1da177e4 | 239 | |
3f417200 HV |
240 | static struct i2c_driver bt856_driver = { |
241 | .driver = { | |
3f417200 HV |
242 | .name = "bt856", |
243 | }, | |
244 | .probe = bt856_probe, | |
245 | .remove = bt856_remove, | |
246 | .id_table = bt856_id, | |
1da177e4 | 247 | }; |
3f417200 | 248 | |
c6e8d86f | 249 | module_i2c_driver(bt856_driver); |