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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 GL |
17 | |
18 | #include <media/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 | ||
96 | static int ak881x_try_g_mbus_fmt(struct v4l2_subdev *sd, | |
97 | struct v4l2_mbus_framefmt *mf) | |
98 | { | |
99 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
100 | struct ak881x *ak881x = to_ak881x(client); | |
101 | ||
102 | v4l_bound_align_image(&mf->width, 0, 720, 2, | |
103 | &mf->height, 0, ak881x->lines, 1, 0); | |
104 | mf->field = V4L2_FIELD_INTERLACED; | |
f5fe58fd | 105 | mf->code = MEDIA_BUS_FMT_YUYV8_2X8; |
aec11e5d GL |
106 | mf->colorspace = V4L2_COLORSPACE_SMPTE170M; |
107 | ||
108 | return 0; | |
109 | } | |
110 | ||
111 | static int ak881x_s_mbus_fmt(struct v4l2_subdev *sd, | |
112 | struct v4l2_mbus_framefmt *mf) | |
113 | { | |
114 | if (mf->field != V4L2_FIELD_INTERLACED || | |
f5fe58fd | 115 | mf->code != MEDIA_BUS_FMT_YUYV8_2X8) |
aec11e5d GL |
116 | return -EINVAL; |
117 | ||
118 | return ak881x_try_g_mbus_fmt(sd, mf); | |
119 | } | |
120 | ||
3805f201 | 121 | static int ak881x_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned int index, |
f5fe58fd | 122 | u32 *code) |
aec11e5d GL |
123 | { |
124 | if (index) | |
125 | return -EINVAL; | |
126 | ||
f5fe58fd | 127 | *code = MEDIA_BUS_FMT_YUYV8_2X8; |
aec11e5d GL |
128 | return 0; |
129 | } | |
130 | ||
131 | static int ak881x_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) | |
132 | { | |
133 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
134 | struct ak881x *ak881x = to_ak881x(client); | |
135 | ||
136 | a->bounds.left = 0; | |
137 | a->bounds.top = 0; | |
138 | a->bounds.width = 720; | |
139 | a->bounds.height = ak881x->lines; | |
140 | a->defrect = a->bounds; | |
141 | a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; | |
142 | a->pixelaspect.numerator = 1; | |
143 | a->pixelaspect.denominator = 1; | |
144 | ||
145 | return 0; | |
146 | } | |
147 | ||
148 | static int ak881x_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) | |
149 | { | |
150 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
151 | struct ak881x *ak881x = to_ak881x(client); | |
152 | u8 vp1; | |
153 | ||
154 | if (std == V4L2_STD_NTSC_443) { | |
155 | vp1 = 3; | |
156 | ak881x->lines = 480; | |
157 | } else if (std == V4L2_STD_PAL_M) { | |
158 | vp1 = 5; | |
159 | ak881x->lines = 480; | |
160 | } else if (std == V4L2_STD_PAL_60) { | |
161 | vp1 = 7; | |
162 | ak881x->lines = 480; | |
163 | } else if (std && !(std & ~V4L2_STD_PAL)) { | |
164 | vp1 = 0xf; | |
165 | ak881x->lines = 576; | |
166 | } else if (std && !(std & ~V4L2_STD_NTSC)) { | |
167 | vp1 = 0; | |
168 | ak881x->lines = 480; | |
169 | } else { | |
170 | /* No SECAM or PAL_N/Nc supported */ | |
171 | return -EINVAL; | |
172 | } | |
173 | ||
174 | reg_set(client, AK881X_VIDEO_PROCESS1, vp1, 0xf); | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | static int ak881x_s_stream(struct v4l2_subdev *sd, int enable) | |
180 | { | |
181 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
182 | struct ak881x *ak881x = to_ak881x(client); | |
183 | ||
184 | if (enable) { | |
185 | u8 dac; | |
186 | /* For colour-bar testing set bit 6 of AK881X_VIDEO_PROCESS1 */ | |
187 | /* Default: composite output */ | |
188 | if (ak881x->pdata->flags & AK881X_COMPONENT) | |
189 | dac = 3; | |
190 | else | |
191 | dac = 4; | |
192 | /* Turn on the DAC(s) */ | |
193 | reg_write(client, AK881X_DAC_MODE, dac); | |
194 | dev_dbg(&client->dev, "chip status 0x%x\n", | |
195 | reg_read(client, AK881X_STATUS)); | |
196 | } else { | |
197 | /* ...and clear bit 6 of AK881X_VIDEO_PROCESS1 here */ | |
198 | reg_write(client, AK881X_DAC_MODE, 0); | |
199 | dev_dbg(&client->dev, "chip status 0x%x\n", | |
200 | reg_read(client, AK881X_STATUS)); | |
201 | } | |
202 | ||
203 | return 0; | |
204 | } | |
205 | ||
206 | static struct v4l2_subdev_core_ops ak881x_subdev_core_ops = { | |
aec11e5d GL |
207 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
208 | .g_register = ak881x_g_register, | |
209 | .s_register = ak881x_s_register, | |
210 | #endif | |
211 | }; | |
212 | ||
213 | static struct v4l2_subdev_video_ops ak881x_subdev_video_ops = { | |
214 | .s_mbus_fmt = ak881x_s_mbus_fmt, | |
215 | .g_mbus_fmt = ak881x_try_g_mbus_fmt, | |
216 | .try_mbus_fmt = ak881x_try_g_mbus_fmt, | |
217 | .cropcap = ak881x_cropcap, | |
218 | .enum_mbus_fmt = ak881x_enum_mbus_fmt, | |
219 | .s_std_output = ak881x_s_std_output, | |
220 | .s_stream = ak881x_s_stream, | |
221 | }; | |
222 | ||
223 | static struct v4l2_subdev_ops ak881x_subdev_ops = { | |
224 | .core = &ak881x_subdev_core_ops, | |
225 | .video = &ak881x_subdev_video_ops, | |
226 | }; | |
227 | ||
228 | static int ak881x_probe(struct i2c_client *client, | |
229 | const struct i2c_device_id *did) | |
230 | { | |
231 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); | |
232 | struct ak881x *ak881x; | |
233 | u8 ifmode, data; | |
234 | ||
235 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { | |
236 | dev_warn(&adapter->dev, | |
237 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
238 | return -EIO; | |
239 | } | |
240 | ||
c02b211d | 241 | ak881x = devm_kzalloc(&client->dev, sizeof(*ak881x), GFP_KERNEL); |
aec11e5d GL |
242 | if (!ak881x) |
243 | return -ENOMEM; | |
244 | ||
245 | v4l2_i2c_subdev_init(&ak881x->subdev, client, &ak881x_subdev_ops); | |
246 | ||
247 | data = reg_read(client, AK881X_DEVICE_ID); | |
248 | ||
249 | switch (data) { | |
250 | case 0x13: | |
aec11e5d | 251 | case 0x14: |
aec11e5d GL |
252 | break; |
253 | default: | |
254 | dev_err(&client->dev, | |
255 | "No ak881x chip detected, register read %x\n", data); | |
aec11e5d GL |
256 | return -ENODEV; |
257 | } | |
258 | ||
259 | ak881x->revision = reg_read(client, AK881X_DEVICE_REVISION); | |
260 | ak881x->pdata = client->dev.platform_data; | |
261 | ||
262 | if (ak881x->pdata) { | |
263 | if (ak881x->pdata->flags & AK881X_FIELD) | |
264 | ifmode = 4; | |
265 | else | |
266 | ifmode = 0; | |
267 | ||
268 | switch (ak881x->pdata->flags & AK881X_IF_MODE_MASK) { | |
269 | case AK881X_IF_MODE_BT656: | |
270 | ifmode |= 1; | |
271 | break; | |
272 | case AK881X_IF_MODE_MASTER: | |
273 | ifmode |= 2; | |
274 | break; | |
275 | case AK881X_IF_MODE_SLAVE: | |
276 | default: | |
277 | break; | |
278 | } | |
279 | ||
280 | dev_dbg(&client->dev, "IF mode %x\n", ifmode); | |
281 | ||
282 | /* | |
283 | * "Line Blanking No." seems to be the same as the number of | |
284 | * "black" lines on, e.g., SuperH VOU, whose default value of 20 | |
285 | * "incidentally" matches ak881x' default | |
286 | */ | |
287 | reg_write(client, AK881X_INTERFACE_MODE, ifmode | (20 << 3)); | |
288 | } | |
289 | ||
290 | /* Hardware default: NTSC-M */ | |
291 | ak881x->lines = 480; | |
292 | ||
293 | dev_info(&client->dev, "Detected an ak881x chip ID %x, revision %x\n", | |
294 | data, ak881x->revision); | |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
299 | static int ak881x_remove(struct i2c_client *client) | |
300 | { | |
301 | struct ak881x *ak881x = to_ak881x(client); | |
302 | ||
303 | v4l2_device_unregister_subdev(&ak881x->subdev); | |
aec11e5d GL |
304 | |
305 | return 0; | |
306 | } | |
307 | ||
308 | static const struct i2c_device_id ak881x_id[] = { | |
309 | { "ak8813", 0 }, | |
310 | { "ak8814", 0 }, | |
311 | { } | |
312 | }; | |
313 | MODULE_DEVICE_TABLE(i2c, ak881x_id); | |
314 | ||
315 | static struct i2c_driver ak881x_i2c_driver = { | |
316 | .driver = { | |
317 | .name = "ak881x", | |
318 | }, | |
319 | .probe = ak881x_probe, | |
320 | .remove = ak881x_remove, | |
321 | .id_table = ak881x_id, | |
322 | }; | |
323 | ||
c6e8d86f | 324 | module_i2c_driver(ak881x_i2c_driver); |
aec11e5d GL |
325 | |
326 | MODULE_DESCRIPTION("TV-output driver for ak8813/ak8814"); | |
327 | MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>"); | |
328 | MODULE_LICENSE("GPL v2"); |