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aec11e5d GL |
1 | /* |
2 | * Driver for AK8813 / AK8814 TV-ecoders from Asahi Kasei Microsystems Co., Ltd. (AKM) | |
3 | * | |
4 | * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | ||
11 | #include <linux/i2c.h> | |
12 | #include <linux/init.h> | |
13 | #include <linux/platform_device.h> | |
1db2c22b | 14 | #include <linux/slab.h> |
aec11e5d | 15 | #include <linux/videodev2.h> |
7a707b89 | 16 | #include <linux/module.h> |
aec11e5d | 17 | |
b5dcee22 | 18 | #include <media/i2c/ak881x.h> |
aec11e5d GL |
19 | #include <media/v4l2-common.h> |
20 | #include <media/v4l2-device.h> | |
21 | ||
22 | #define AK881X_INTERFACE_MODE 0 | |
23 | #define AK881X_VIDEO_PROCESS1 1 | |
24 | #define AK881X_VIDEO_PROCESS2 2 | |
25 | #define AK881X_VIDEO_PROCESS3 3 | |
26 | #define AK881X_DAC_MODE 5 | |
27 | #define AK881X_STATUS 0x24 | |
28 | #define AK881X_DEVICE_ID 0x25 | |
29 | #define AK881X_DEVICE_REVISION 0x26 | |
30 | ||
31 | struct ak881x { | |
32 | struct v4l2_subdev subdev; | |
33 | struct ak881x_pdata *pdata; | |
34 | unsigned int lines; | |
aec11e5d GL |
35 | char revision; /* DEVICE_REVISION content */ |
36 | }; | |
37 | ||
38 | static int reg_read(struct i2c_client *client, const u8 reg) | |
39 | { | |
40 | return i2c_smbus_read_byte_data(client, reg); | |
41 | } | |
42 | ||
43 | static int reg_write(struct i2c_client *client, const u8 reg, | |
44 | const u8 data) | |
45 | { | |
46 | return i2c_smbus_write_byte_data(client, reg, data); | |
47 | } | |
48 | ||
49 | static int reg_set(struct i2c_client *client, const u8 reg, | |
50 | const u8 data, u8 mask) | |
51 | { | |
52 | int ret = reg_read(client, reg); | |
53 | if (ret < 0) | |
54 | return ret; | |
55 | return reg_write(client, reg, (ret & ~mask) | (data & mask)); | |
56 | } | |
57 | ||
58 | static struct ak881x *to_ak881x(const struct i2c_client *client) | |
59 | { | |
60 | return container_of(i2c_get_clientdata(client), struct ak881x, subdev); | |
61 | } | |
62 | ||
aec11e5d GL |
63 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
64 | static int ak881x_g_register(struct v4l2_subdev *sd, | |
65 | struct v4l2_dbg_register *reg) | |
66 | { | |
67 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
68 | ||
e1277110 | 69 | if (reg->reg > 0x26) |
aec11e5d GL |
70 | return -EINVAL; |
71 | ||
15c4fee3 | 72 | reg->size = 1; |
aec11e5d GL |
73 | reg->val = reg_read(client, reg->reg); |
74 | ||
75 | if (reg->val > 0xffff) | |
76 | return -EIO; | |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
81 | static int ak881x_s_register(struct v4l2_subdev *sd, | |
977ba3b1 | 82 | const struct v4l2_dbg_register *reg) |
aec11e5d GL |
83 | { |
84 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
85 | ||
e1277110 | 86 | if (reg->reg > 0x26) |
aec11e5d GL |
87 | return -EINVAL; |
88 | ||
aec11e5d GL |
89 | if (reg_write(client, reg->reg, reg->val) < 0) |
90 | return -EIO; | |
91 | ||
92 | return 0; | |
93 | } | |
94 | #endif | |
95 | ||
da298c6d HV |
96 | static int ak881x_fill_fmt(struct v4l2_subdev *sd, |
97 | struct v4l2_subdev_pad_config *cfg, | |
98 | struct v4l2_subdev_format *format) | |
aec11e5d | 99 | { |
da298c6d | 100 | struct v4l2_mbus_framefmt *mf = &format->format; |
aec11e5d GL |
101 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
102 | struct ak881x *ak881x = to_ak881x(client); | |
103 | ||
da298c6d HV |
104 | if (format->pad) |
105 | return -EINVAL; | |
106 | ||
aec11e5d GL |
107 | v4l_bound_align_image(&mf->width, 0, 720, 2, |
108 | &mf->height, 0, ak881x->lines, 1, 0); | |
109 | mf->field = V4L2_FIELD_INTERLACED; | |
f5fe58fd | 110 | mf->code = MEDIA_BUS_FMT_YUYV8_2X8; |
aec11e5d GL |
111 | mf->colorspace = V4L2_COLORSPACE_SMPTE170M; |
112 | ||
113 | return 0; | |
114 | } | |
115 | ||
ebcff5fc HV |
116 | static int ak881x_enum_mbus_code(struct v4l2_subdev *sd, |
117 | struct v4l2_subdev_pad_config *cfg, | |
118 | struct v4l2_subdev_mbus_code_enum *code) | |
aec11e5d | 119 | { |
ebcff5fc | 120 | if (code->pad || code->index) |
aec11e5d GL |
121 | return -EINVAL; |
122 | ||
ebcff5fc | 123 | code->code = MEDIA_BUS_FMT_YUYV8_2X8; |
aec11e5d GL |
124 | return 0; |
125 | } | |
126 | ||
10d5509c HV |
127 | static int ak881x_get_selection(struct v4l2_subdev *sd, |
128 | struct v4l2_subdev_pad_config *cfg, | |
129 | struct v4l2_subdev_selection *sel) | |
aec11e5d GL |
130 | { |
131 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
132 | struct ak881x *ak881x = to_ak881x(client); | |
133 | ||
10d5509c HV |
134 | if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE) |
135 | return -EINVAL; | |
aec11e5d | 136 | |
10d5509c HV |
137 | switch (sel->target) { |
138 | case V4L2_SEL_TGT_CROP_BOUNDS: | |
139 | case V4L2_SEL_TGT_CROP_DEFAULT: | |
140 | sel->r.left = 0; | |
141 | sel->r.top = 0; | |
142 | sel->r.width = 720; | |
143 | sel->r.height = ak881x->lines; | |
144 | return 0; | |
145 | default: | |
146 | return -EINVAL; | |
147 | } | |
aec11e5d GL |
148 | } |
149 | ||
150 | static int ak881x_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) | |
151 | { | |
152 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
153 | struct ak881x *ak881x = to_ak881x(client); | |
154 | u8 vp1; | |
155 | ||
156 | if (std == V4L2_STD_NTSC_443) { | |
157 | vp1 = 3; | |
158 | ak881x->lines = 480; | |
159 | } else if (std == V4L2_STD_PAL_M) { | |
160 | vp1 = 5; | |
161 | ak881x->lines = 480; | |
162 | } else if (std == V4L2_STD_PAL_60) { | |
163 | vp1 = 7; | |
164 | ak881x->lines = 480; | |
517ef255 | 165 | } else if (std & V4L2_STD_NTSC) { |
aec11e5d GL |
166 | vp1 = 0; |
167 | ak881x->lines = 480; | |
517ef255 HV |
168 | } else if (std & V4L2_STD_PAL) { |
169 | vp1 = 0xf; | |
170 | ak881x->lines = 576; | |
aec11e5d GL |
171 | } else { |
172 | /* No SECAM or PAL_N/Nc supported */ | |
173 | return -EINVAL; | |
174 | } | |
175 | ||
176 | reg_set(client, AK881X_VIDEO_PROCESS1, vp1, 0xf); | |
177 | ||
178 | return 0; | |
179 | } | |
180 | ||
181 | static int ak881x_s_stream(struct v4l2_subdev *sd, int enable) | |
182 | { | |
183 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
184 | struct ak881x *ak881x = to_ak881x(client); | |
185 | ||
186 | if (enable) { | |
187 | u8 dac; | |
188 | /* For colour-bar testing set bit 6 of AK881X_VIDEO_PROCESS1 */ | |
189 | /* Default: composite output */ | |
190 | if (ak881x->pdata->flags & AK881X_COMPONENT) | |
191 | dac = 3; | |
192 | else | |
193 | dac = 4; | |
194 | /* Turn on the DAC(s) */ | |
195 | reg_write(client, AK881X_DAC_MODE, dac); | |
196 | dev_dbg(&client->dev, "chip status 0x%x\n", | |
197 | reg_read(client, AK881X_STATUS)); | |
198 | } else { | |
199 | /* ...and clear bit 6 of AK881X_VIDEO_PROCESS1 here */ | |
200 | reg_write(client, AK881X_DAC_MODE, 0); | |
201 | dev_dbg(&client->dev, "chip status 0x%x\n", | |
202 | reg_read(client, AK881X_STATUS)); | |
203 | } | |
204 | ||
205 | return 0; | |
206 | } | |
207 | ||
4d7aa5e9 | 208 | static const struct v4l2_subdev_core_ops ak881x_subdev_core_ops = { |
aec11e5d GL |
209 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
210 | .g_register = ak881x_g_register, | |
211 | .s_register = ak881x_s_register, | |
212 | #endif | |
213 | }; | |
214 | ||
4d7aa5e9 | 215 | static const struct v4l2_subdev_video_ops ak881x_subdev_video_ops = { |
aec11e5d GL |
216 | .s_std_output = ak881x_s_std_output, |
217 | .s_stream = ak881x_s_stream, | |
218 | }; | |
219 | ||
ebcff5fc HV |
220 | static const struct v4l2_subdev_pad_ops ak881x_subdev_pad_ops = { |
221 | .enum_mbus_code = ak881x_enum_mbus_code, | |
10d5509c | 222 | .get_selection = ak881x_get_selection, |
da298c6d HV |
223 | .set_fmt = ak881x_fill_fmt, |
224 | .get_fmt = ak881x_fill_fmt, | |
ebcff5fc HV |
225 | }; |
226 | ||
4d7aa5e9 | 227 | static const struct v4l2_subdev_ops ak881x_subdev_ops = { |
aec11e5d GL |
228 | .core = &ak881x_subdev_core_ops, |
229 | .video = &ak881x_subdev_video_ops, | |
ebcff5fc | 230 | .pad = &ak881x_subdev_pad_ops, |
aec11e5d GL |
231 | }; |
232 | ||
233 | static int ak881x_probe(struct i2c_client *client, | |
234 | const struct i2c_device_id *did) | |
235 | { | |
236 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); | |
237 | struct ak881x *ak881x; | |
238 | u8 ifmode, data; | |
239 | ||
240 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { | |
241 | dev_warn(&adapter->dev, | |
242 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
243 | return -EIO; | |
244 | } | |
245 | ||
c02b211d | 246 | ak881x = devm_kzalloc(&client->dev, sizeof(*ak881x), GFP_KERNEL); |
aec11e5d GL |
247 | if (!ak881x) |
248 | return -ENOMEM; | |
249 | ||
250 | v4l2_i2c_subdev_init(&ak881x->subdev, client, &ak881x_subdev_ops); | |
251 | ||
252 | data = reg_read(client, AK881X_DEVICE_ID); | |
253 | ||
254 | switch (data) { | |
255 | case 0x13: | |
aec11e5d | 256 | case 0x14: |
aec11e5d GL |
257 | break; |
258 | default: | |
259 | dev_err(&client->dev, | |
260 | "No ak881x chip detected, register read %x\n", data); | |
aec11e5d GL |
261 | return -ENODEV; |
262 | } | |
263 | ||
264 | ak881x->revision = reg_read(client, AK881X_DEVICE_REVISION); | |
265 | ak881x->pdata = client->dev.platform_data; | |
266 | ||
267 | if (ak881x->pdata) { | |
268 | if (ak881x->pdata->flags & AK881X_FIELD) | |
269 | ifmode = 4; | |
270 | else | |
271 | ifmode = 0; | |
272 | ||
273 | switch (ak881x->pdata->flags & AK881X_IF_MODE_MASK) { | |
274 | case AK881X_IF_MODE_BT656: | |
275 | ifmode |= 1; | |
276 | break; | |
277 | case AK881X_IF_MODE_MASTER: | |
278 | ifmode |= 2; | |
279 | break; | |
280 | case AK881X_IF_MODE_SLAVE: | |
281 | default: | |
282 | break; | |
283 | } | |
284 | ||
285 | dev_dbg(&client->dev, "IF mode %x\n", ifmode); | |
286 | ||
287 | /* | |
288 | * "Line Blanking No." seems to be the same as the number of | |
289 | * "black" lines on, e.g., SuperH VOU, whose default value of 20 | |
290 | * "incidentally" matches ak881x' default | |
291 | */ | |
292 | reg_write(client, AK881X_INTERFACE_MODE, ifmode | (20 << 3)); | |
293 | } | |
294 | ||
295 | /* Hardware default: NTSC-M */ | |
296 | ak881x->lines = 480; | |
297 | ||
298 | dev_info(&client->dev, "Detected an ak881x chip ID %x, revision %x\n", | |
299 | data, ak881x->revision); | |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
304 | static int ak881x_remove(struct i2c_client *client) | |
305 | { | |
306 | struct ak881x *ak881x = to_ak881x(client); | |
307 | ||
308 | v4l2_device_unregister_subdev(&ak881x->subdev); | |
aec11e5d GL |
309 | |
310 | return 0; | |
311 | } | |
312 | ||
313 | static const struct i2c_device_id ak881x_id[] = { | |
314 | { "ak8813", 0 }, | |
315 | { "ak8814", 0 }, | |
316 | { } | |
317 | }; | |
318 | MODULE_DEVICE_TABLE(i2c, ak881x_id); | |
319 | ||
320 | static struct i2c_driver ak881x_i2c_driver = { | |
321 | .driver = { | |
322 | .name = "ak881x", | |
323 | }, | |
324 | .probe = ak881x_probe, | |
325 | .remove = ak881x_remove, | |
326 | .id_table = ak881x_id, | |
327 | }; | |
328 | ||
c6e8d86f | 329 | module_i2c_driver(ak881x_i2c_driver); |
aec11e5d GL |
330 | |
331 | MODULE_DESCRIPTION("TV-output driver for ak8813/ak8814"); | |
332 | MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>"); | |
333 | MODULE_LICENSE("GPL v2"); |