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1802d0be | 1 | // SPDX-License-Identifier: GPL-2.0-only |
0890ec19 HV |
2 | /* |
3 | * Copyright (C) 2005-2006 Micronas USA Inc. | |
0890ec19 HV |
4 | */ |
5 | ||
6 | #include <linux/module.h> | |
7 | #include <linux/init.h> | |
8 | #include <linux/i2c.h> | |
9 | #include <linux/videodev2.h> | |
10 | #include <linux/ioctl.h> | |
11 | #include <media/v4l2-device.h> | |
12 | #include <media/v4l2-ctrls.h> | |
13 | #include <linux/slab.h> | |
14 | ||
15 | MODULE_DESCRIPTION("TW9903 I2C subdev driver"); | |
16 | MODULE_LICENSE("GPL v2"); | |
17 | ||
18 | /* | |
19 | * This driver is based on the wis-tw9903.c source that was in | |
20 | * drivers/staging/media/go7007. That source had commented out code for | |
21 | * saturation and scaling (neither seemed to work). If anyone ever gets | |
22 | * hardware to test this driver, then that code might be useful to look at. | |
23 | * You need to get the kernel sources of, say, kernel 3.8 where that | |
24 | * wis-tw9903 driver is still present. | |
25 | */ | |
26 | ||
27 | struct tw9903 { | |
28 | struct v4l2_subdev sd; | |
29 | struct v4l2_ctrl_handler hdl; | |
30 | v4l2_std_id norm; | |
31 | }; | |
32 | ||
33 | static inline struct tw9903 *to_state(struct v4l2_subdev *sd) | |
34 | { | |
35 | return container_of(sd, struct tw9903, sd); | |
36 | } | |
37 | ||
38 | static const u8 initial_registers[] = { | |
39 | 0x02, 0x44, /* input 1, composite */ | |
40 | 0x03, 0x92, /* correct digital format */ | |
41 | 0x04, 0x00, | |
42 | 0x05, 0x80, /* or 0x00 for PAL */ | |
43 | 0x06, 0x40, /* second internal current reference */ | |
44 | 0x07, 0x02, /* window */ | |
45 | 0x08, 0x14, /* window */ | |
46 | 0x09, 0xf0, /* window */ | |
47 | 0x0a, 0x81, /* window */ | |
48 | 0x0b, 0xd0, /* window */ | |
49 | 0x0c, 0x8c, | |
50 | 0x0d, 0x00, /* scaling */ | |
51 | 0x0e, 0x11, /* scaling */ | |
52 | 0x0f, 0x00, /* scaling */ | |
53 | 0x10, 0x00, /* brightness */ | |
54 | 0x11, 0x60, /* contrast */ | |
55 | 0x12, 0x01, /* sharpness */ | |
56 | 0x13, 0x7f, /* U gain */ | |
57 | 0x14, 0x5a, /* V gain */ | |
58 | 0x15, 0x00, /* hue */ | |
59 | 0x16, 0xc3, /* sharpness */ | |
60 | 0x18, 0x00, | |
61 | 0x19, 0x58, /* vbi */ | |
62 | 0x1a, 0x80, | |
63 | 0x1c, 0x0f, /* video norm */ | |
64 | 0x1d, 0x7f, /* video norm */ | |
65 | 0x20, 0xa0, /* clamping gain (working 0x50) */ | |
66 | 0x21, 0x22, | |
67 | 0x22, 0xf0, | |
68 | 0x23, 0xfe, | |
69 | 0x24, 0x3c, | |
70 | 0x25, 0x38, | |
71 | 0x26, 0x44, | |
72 | 0x27, 0x20, | |
73 | 0x28, 0x00, | |
74 | 0x29, 0x15, | |
75 | 0x2a, 0xa0, | |
76 | 0x2b, 0x44, | |
77 | 0x2c, 0x37, | |
78 | 0x2d, 0x00, | |
79 | 0x2e, 0xa5, /* burst PLL control (working: a9) */ | |
80 | 0x2f, 0xe0, /* 0xea is blue test frame -- 0xe0 for normal */ | |
81 | 0x31, 0x00, | |
82 | 0x33, 0x22, | |
83 | 0x34, 0x11, | |
84 | 0x35, 0x35, | |
85 | 0x3b, 0x05, | |
86 | 0x06, 0xc0, /* reset device */ | |
87 | 0x00, 0x00, /* Terminator (reg 0x00 is read-only) */ | |
88 | }; | |
89 | ||
90 | static int write_reg(struct v4l2_subdev *sd, u8 reg, u8 value) | |
91 | { | |
92 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
93 | ||
94 | return i2c_smbus_write_byte_data(client, reg, value); | |
95 | } | |
96 | ||
97 | static int write_regs(struct v4l2_subdev *sd, const u8 *regs) | |
98 | { | |
99 | int i; | |
100 | ||
101 | for (i = 0; regs[i] != 0x00; i += 2) | |
102 | if (write_reg(sd, regs[i], regs[i + 1]) < 0) | |
103 | return -1; | |
104 | return 0; | |
105 | } | |
106 | ||
107 | static int tw9903_s_video_routing(struct v4l2_subdev *sd, u32 input, | |
108 | u32 output, u32 config) | |
109 | { | |
110 | write_reg(sd, 0x02, 0x40 | (input << 1)); | |
111 | return 0; | |
112 | } | |
113 | ||
114 | static int tw9903_s_std(struct v4l2_subdev *sd, v4l2_std_id norm) | |
115 | { | |
116 | struct tw9903 *dec = to_state(sd); | |
117 | bool is_60hz = norm & V4L2_STD_525_60; | |
d4a2cea4 HV |
118 | static const u8 config_60hz[] = { |
119 | 0x05, 0x80, | |
120 | 0x07, 0x02, | |
121 | 0x08, 0x14, | |
122 | 0x09, 0xf0, | |
123 | 0, 0, | |
124 | }; | |
125 | static const u8 config_50hz[] = { | |
126 | 0x05, 0x00, | |
127 | 0x07, 0x12, | |
128 | 0x08, 0x18, | |
129 | 0x09, 0x20, | |
0890ec19 HV |
130 | 0, 0, |
131 | }; | |
132 | ||
d4a2cea4 | 133 | write_regs(sd, is_60hz ? config_60hz : config_50hz); |
0890ec19 HV |
134 | dec->norm = norm; |
135 | return 0; | |
136 | } | |
137 | ||
138 | ||
139 | static int tw9903_s_ctrl(struct v4l2_ctrl *ctrl) | |
140 | { | |
141 | struct tw9903 *dec = container_of(ctrl->handler, struct tw9903, hdl); | |
142 | struct v4l2_subdev *sd = &dec->sd; | |
143 | ||
144 | switch (ctrl->id) { | |
145 | case V4L2_CID_BRIGHTNESS: | |
146 | write_reg(sd, 0x10, ctrl->val); | |
147 | break; | |
148 | case V4L2_CID_CONTRAST: | |
149 | write_reg(sd, 0x11, ctrl->val); | |
150 | break; | |
151 | case V4L2_CID_HUE: | |
152 | write_reg(sd, 0x15, ctrl->val); | |
153 | break; | |
154 | default: | |
155 | return -EINVAL; | |
156 | } | |
157 | return 0; | |
158 | } | |
159 | ||
160 | static int tw9903_log_status(struct v4l2_subdev *sd) | |
161 | { | |
162 | struct tw9903 *dec = to_state(sd); | |
163 | bool is_60hz = dec->norm & V4L2_STD_525_60; | |
164 | ||
165 | v4l2_info(sd, "Standard: %d Hz\n", is_60hz ? 60 : 50); | |
166 | v4l2_ctrl_subdev_log_status(sd); | |
167 | return 0; | |
168 | } | |
169 | ||
170 | /* --------------------------------------------------------------------------*/ | |
171 | ||
172 | static const struct v4l2_ctrl_ops tw9903_ctrl_ops = { | |
173 | .s_ctrl = tw9903_s_ctrl, | |
174 | }; | |
175 | ||
176 | static const struct v4l2_subdev_core_ops tw9903_core_ops = { | |
177 | .log_status = tw9903_log_status, | |
0890ec19 HV |
178 | }; |
179 | ||
180 | static const struct v4l2_subdev_video_ops tw9903_video_ops = { | |
8774bed9 | 181 | .s_std = tw9903_s_std, |
0890ec19 HV |
182 | .s_routing = tw9903_s_video_routing, |
183 | }; | |
184 | ||
185 | static const struct v4l2_subdev_ops tw9903_ops = { | |
186 | .core = &tw9903_core_ops, | |
187 | .video = &tw9903_video_ops, | |
188 | }; | |
189 | ||
190 | /* --------------------------------------------------------------------------*/ | |
191 | ||
4fa8bcc3 | 192 | static int tw9903_probe(struct i2c_client *client) |
0890ec19 HV |
193 | { |
194 | struct tw9903 *dec; | |
195 | struct v4l2_subdev *sd; | |
196 | struct v4l2_ctrl_handler *hdl; | |
197 | ||
198 | /* Check if the adapter supports the needed features */ | |
199 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
200 | return -EIO; | |
201 | ||
202 | v4l_info(client, "chip found @ 0x%02x (%s)\n", | |
203 | client->addr << 1, client->adapter->name); | |
204 | ||
c02b211d | 205 | dec = devm_kzalloc(&client->dev, sizeof(*dec), GFP_KERNEL); |
0890ec19 HV |
206 | if (dec == NULL) |
207 | return -ENOMEM; | |
208 | sd = &dec->sd; | |
209 | v4l2_i2c_subdev_init(sd, client, &tw9903_ops); | |
210 | hdl = &dec->hdl; | |
211 | v4l2_ctrl_handler_init(hdl, 4); | |
212 | v4l2_ctrl_new_std(hdl, &tw9903_ctrl_ops, | |
213 | V4L2_CID_BRIGHTNESS, -128, 127, 1, 0); | |
214 | v4l2_ctrl_new_std(hdl, &tw9903_ctrl_ops, | |
215 | V4L2_CID_CONTRAST, 0, 255, 1, 0x60); | |
216 | v4l2_ctrl_new_std(hdl, &tw9903_ctrl_ops, | |
217 | V4L2_CID_HUE, -128, 127, 1, 0); | |
218 | sd->ctrl_handler = hdl; | |
219 | if (hdl->error) { | |
220 | int err = hdl->error; | |
221 | ||
222 | v4l2_ctrl_handler_free(hdl); | |
0890ec19 HV |
223 | return err; |
224 | } | |
225 | ||
226 | /* Initialize tw9903 */ | |
227 | dec->norm = V4L2_STD_NTSC; | |
228 | ||
229 | if (write_regs(sd, initial_registers) < 0) { | |
230 | v4l2_err(client, "error initializing TW9903\n"); | |
0890ec19 HV |
231 | return -EINVAL; |
232 | } | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
ed5c2f5f | 237 | static void tw9903_remove(struct i2c_client *client) |
0890ec19 HV |
238 | { |
239 | struct v4l2_subdev *sd = i2c_get_clientdata(client); | |
240 | ||
241 | v4l2_device_unregister_subdev(sd); | |
242 | v4l2_ctrl_handler_free(&to_state(sd)->hdl); | |
0890ec19 HV |
243 | } |
244 | ||
245 | /* ----------------------------------------------------------------------- */ | |
246 | ||
247 | static const struct i2c_device_id tw9903_id[] = { | |
cc4cbd4b | 248 | { "tw9903" }, |
0890ec19 HV |
249 | { } |
250 | }; | |
251 | MODULE_DEVICE_TABLE(i2c, tw9903_id); | |
252 | ||
253 | static struct i2c_driver tw9903_driver = { | |
254 | .driver = { | |
0890ec19 HV |
255 | .name = "tw9903", |
256 | }, | |
aaeb31c0 | 257 | .probe = tw9903_probe, |
0890ec19 HV |
258 | .remove = tw9903_remove, |
259 | .id_table = tw9903_id, | |
260 | }; | |
261 | module_i2c_driver(tw9903_driver); |