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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> | |
19 | #include <media/v4l2-chip-ident.h> | |
20 | #include <media/v4l2-common.h> | |
21 | #include <media/v4l2-device.h> | |
22 | ||
23 | #define AK881X_INTERFACE_MODE 0 | |
24 | #define AK881X_VIDEO_PROCESS1 1 | |
25 | #define AK881X_VIDEO_PROCESS2 2 | |
26 | #define AK881X_VIDEO_PROCESS3 3 | |
27 | #define AK881X_DAC_MODE 5 | |
28 | #define AK881X_STATUS 0x24 | |
29 | #define AK881X_DEVICE_ID 0x25 | |
30 | #define AK881X_DEVICE_REVISION 0x26 | |
31 | ||
32 | struct ak881x { | |
33 | struct v4l2_subdev subdev; | |
34 | struct ak881x_pdata *pdata; | |
35 | unsigned int lines; | |
36 | int id; /* DEVICE_ID code V4L2_IDENT_AK881X code from v4l2-chip-ident.h */ | |
37 | char revision; /* DEVICE_REVISION content */ | |
38 | }; | |
39 | ||
40 | static int reg_read(struct i2c_client *client, const u8 reg) | |
41 | { | |
42 | return i2c_smbus_read_byte_data(client, reg); | |
43 | } | |
44 | ||
45 | static int reg_write(struct i2c_client *client, const u8 reg, | |
46 | const u8 data) | |
47 | { | |
48 | return i2c_smbus_write_byte_data(client, reg, data); | |
49 | } | |
50 | ||
51 | static int reg_set(struct i2c_client *client, const u8 reg, | |
52 | const u8 data, u8 mask) | |
53 | { | |
54 | int ret = reg_read(client, reg); | |
55 | if (ret < 0) | |
56 | return ret; | |
57 | return reg_write(client, reg, (ret & ~mask) | (data & mask)); | |
58 | } | |
59 | ||
60 | static struct ak881x *to_ak881x(const struct i2c_client *client) | |
61 | { | |
62 | return container_of(i2c_get_clientdata(client), struct ak881x, subdev); | |
63 | } | |
64 | ||
65 | static int ak881x_g_chip_ident(struct v4l2_subdev *sd, | |
66 | struct v4l2_dbg_chip_ident *id) | |
67 | { | |
68 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
69 | struct ak881x *ak881x = to_ak881x(client); | |
70 | ||
71 | if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) | |
72 | return -EINVAL; | |
73 | ||
74 | if (id->match.addr != client->addr) | |
75 | return -ENODEV; | |
76 | ||
77 | id->ident = ak881x->id; | |
78 | id->revision = ak881x->revision; | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
83 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
84 | static int ak881x_g_register(struct v4l2_subdev *sd, | |
85 | struct v4l2_dbg_register *reg) | |
86 | { | |
87 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
88 | ||
89 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0x26) | |
90 | return -EINVAL; | |
91 | ||
92 | if (reg->match.addr != client->addr) | |
93 | return -ENODEV; | |
94 | ||
95 | reg->val = reg_read(client, reg->reg); | |
96 | ||
97 | if (reg->val > 0xffff) | |
98 | return -EIO; | |
99 | ||
100 | return 0; | |
101 | } | |
102 | ||
103 | static int ak881x_s_register(struct v4l2_subdev *sd, | |
104 | struct v4l2_dbg_register *reg) | |
105 | { | |
106 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
107 | ||
108 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0x26) | |
109 | return -EINVAL; | |
110 | ||
111 | if (reg->match.addr != client->addr) | |
112 | return -ENODEV; | |
113 | ||
114 | if (reg_write(client, reg->reg, reg->val) < 0) | |
115 | return -EIO; | |
116 | ||
117 | return 0; | |
118 | } | |
119 | #endif | |
120 | ||
121 | static int ak881x_try_g_mbus_fmt(struct v4l2_subdev *sd, | |
122 | struct v4l2_mbus_framefmt *mf) | |
123 | { | |
124 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
125 | struct ak881x *ak881x = to_ak881x(client); | |
126 | ||
127 | v4l_bound_align_image(&mf->width, 0, 720, 2, | |
128 | &mf->height, 0, ak881x->lines, 1, 0); | |
129 | mf->field = V4L2_FIELD_INTERLACED; | |
ace6e979 | 130 | mf->code = V4L2_MBUS_FMT_YUYV8_2X8; |
aec11e5d GL |
131 | mf->colorspace = V4L2_COLORSPACE_SMPTE170M; |
132 | ||
133 | return 0; | |
134 | } | |
135 | ||
136 | static int ak881x_s_mbus_fmt(struct v4l2_subdev *sd, | |
137 | struct v4l2_mbus_framefmt *mf) | |
138 | { | |
139 | if (mf->field != V4L2_FIELD_INTERLACED || | |
ace6e979 | 140 | mf->code != V4L2_MBUS_FMT_YUYV8_2X8) |
aec11e5d GL |
141 | return -EINVAL; |
142 | ||
143 | return ak881x_try_g_mbus_fmt(sd, mf); | |
144 | } | |
145 | ||
3805f201 | 146 | static int ak881x_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned int index, |
aec11e5d GL |
147 | enum v4l2_mbus_pixelcode *code) |
148 | { | |
149 | if (index) | |
150 | return -EINVAL; | |
151 | ||
ace6e979 | 152 | *code = V4L2_MBUS_FMT_YUYV8_2X8; |
aec11e5d GL |
153 | return 0; |
154 | } | |
155 | ||
156 | static int ak881x_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) | |
157 | { | |
158 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
159 | struct ak881x *ak881x = to_ak881x(client); | |
160 | ||
161 | a->bounds.left = 0; | |
162 | a->bounds.top = 0; | |
163 | a->bounds.width = 720; | |
164 | a->bounds.height = ak881x->lines; | |
165 | a->defrect = a->bounds; | |
166 | a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; | |
167 | a->pixelaspect.numerator = 1; | |
168 | a->pixelaspect.denominator = 1; | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | static int ak881x_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) | |
174 | { | |
175 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
176 | struct ak881x *ak881x = to_ak881x(client); | |
177 | u8 vp1; | |
178 | ||
179 | if (std == V4L2_STD_NTSC_443) { | |
180 | vp1 = 3; | |
181 | ak881x->lines = 480; | |
182 | } else if (std == V4L2_STD_PAL_M) { | |
183 | vp1 = 5; | |
184 | ak881x->lines = 480; | |
185 | } else if (std == V4L2_STD_PAL_60) { | |
186 | vp1 = 7; | |
187 | ak881x->lines = 480; | |
188 | } else if (std && !(std & ~V4L2_STD_PAL)) { | |
189 | vp1 = 0xf; | |
190 | ak881x->lines = 576; | |
191 | } else if (std && !(std & ~V4L2_STD_NTSC)) { | |
192 | vp1 = 0; | |
193 | ak881x->lines = 480; | |
194 | } else { | |
195 | /* No SECAM or PAL_N/Nc supported */ | |
196 | return -EINVAL; | |
197 | } | |
198 | ||
199 | reg_set(client, AK881X_VIDEO_PROCESS1, vp1, 0xf); | |
200 | ||
201 | return 0; | |
202 | } | |
203 | ||
204 | static int ak881x_s_stream(struct v4l2_subdev *sd, int enable) | |
205 | { | |
206 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
207 | struct ak881x *ak881x = to_ak881x(client); | |
208 | ||
209 | if (enable) { | |
210 | u8 dac; | |
211 | /* For colour-bar testing set bit 6 of AK881X_VIDEO_PROCESS1 */ | |
212 | /* Default: composite output */ | |
213 | if (ak881x->pdata->flags & AK881X_COMPONENT) | |
214 | dac = 3; | |
215 | else | |
216 | dac = 4; | |
217 | /* Turn on the DAC(s) */ | |
218 | reg_write(client, AK881X_DAC_MODE, dac); | |
219 | dev_dbg(&client->dev, "chip status 0x%x\n", | |
220 | reg_read(client, AK881X_STATUS)); | |
221 | } else { | |
222 | /* ...and clear bit 6 of AK881X_VIDEO_PROCESS1 here */ | |
223 | reg_write(client, AK881X_DAC_MODE, 0); | |
224 | dev_dbg(&client->dev, "chip status 0x%x\n", | |
225 | reg_read(client, AK881X_STATUS)); | |
226 | } | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
231 | static struct v4l2_subdev_core_ops ak881x_subdev_core_ops = { | |
232 | .g_chip_ident = ak881x_g_chip_ident, | |
233 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
234 | .g_register = ak881x_g_register, | |
235 | .s_register = ak881x_s_register, | |
236 | #endif | |
237 | }; | |
238 | ||
239 | static struct v4l2_subdev_video_ops ak881x_subdev_video_ops = { | |
240 | .s_mbus_fmt = ak881x_s_mbus_fmt, | |
241 | .g_mbus_fmt = ak881x_try_g_mbus_fmt, | |
242 | .try_mbus_fmt = ak881x_try_g_mbus_fmt, | |
243 | .cropcap = ak881x_cropcap, | |
244 | .enum_mbus_fmt = ak881x_enum_mbus_fmt, | |
245 | .s_std_output = ak881x_s_std_output, | |
246 | .s_stream = ak881x_s_stream, | |
247 | }; | |
248 | ||
249 | static struct v4l2_subdev_ops ak881x_subdev_ops = { | |
250 | .core = &ak881x_subdev_core_ops, | |
251 | .video = &ak881x_subdev_video_ops, | |
252 | }; | |
253 | ||
254 | static int ak881x_probe(struct i2c_client *client, | |
255 | const struct i2c_device_id *did) | |
256 | { | |
257 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); | |
258 | struct ak881x *ak881x; | |
259 | u8 ifmode, data; | |
260 | ||
261 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { | |
262 | dev_warn(&adapter->dev, | |
263 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
264 | return -EIO; | |
265 | } | |
266 | ||
267 | ak881x = kzalloc(sizeof(struct ak881x), GFP_KERNEL); | |
268 | if (!ak881x) | |
269 | return -ENOMEM; | |
270 | ||
271 | v4l2_i2c_subdev_init(&ak881x->subdev, client, &ak881x_subdev_ops); | |
272 | ||
273 | data = reg_read(client, AK881X_DEVICE_ID); | |
274 | ||
275 | switch (data) { | |
276 | case 0x13: | |
277 | ak881x->id = V4L2_IDENT_AK8813; | |
278 | break; | |
279 | case 0x14: | |
280 | ak881x->id = V4L2_IDENT_AK8814; | |
281 | break; | |
282 | default: | |
283 | dev_err(&client->dev, | |
284 | "No ak881x chip detected, register read %x\n", data); | |
285 | kfree(ak881x); | |
286 | return -ENODEV; | |
287 | } | |
288 | ||
289 | ak881x->revision = reg_read(client, AK881X_DEVICE_REVISION); | |
290 | ak881x->pdata = client->dev.platform_data; | |
291 | ||
292 | if (ak881x->pdata) { | |
293 | if (ak881x->pdata->flags & AK881X_FIELD) | |
294 | ifmode = 4; | |
295 | else | |
296 | ifmode = 0; | |
297 | ||
298 | switch (ak881x->pdata->flags & AK881X_IF_MODE_MASK) { | |
299 | case AK881X_IF_MODE_BT656: | |
300 | ifmode |= 1; | |
301 | break; | |
302 | case AK881X_IF_MODE_MASTER: | |
303 | ifmode |= 2; | |
304 | break; | |
305 | case AK881X_IF_MODE_SLAVE: | |
306 | default: | |
307 | break; | |
308 | } | |
309 | ||
310 | dev_dbg(&client->dev, "IF mode %x\n", ifmode); | |
311 | ||
312 | /* | |
313 | * "Line Blanking No." seems to be the same as the number of | |
314 | * "black" lines on, e.g., SuperH VOU, whose default value of 20 | |
315 | * "incidentally" matches ak881x' default | |
316 | */ | |
317 | reg_write(client, AK881X_INTERFACE_MODE, ifmode | (20 << 3)); | |
318 | } | |
319 | ||
320 | /* Hardware default: NTSC-M */ | |
321 | ak881x->lines = 480; | |
322 | ||
323 | dev_info(&client->dev, "Detected an ak881x chip ID %x, revision %x\n", | |
324 | data, ak881x->revision); | |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
329 | static int ak881x_remove(struct i2c_client *client) | |
330 | { | |
331 | struct ak881x *ak881x = to_ak881x(client); | |
332 | ||
333 | v4l2_device_unregister_subdev(&ak881x->subdev); | |
334 | kfree(ak881x); | |
335 | ||
336 | return 0; | |
337 | } | |
338 | ||
339 | static const struct i2c_device_id ak881x_id[] = { | |
340 | { "ak8813", 0 }, | |
341 | { "ak8814", 0 }, | |
342 | { } | |
343 | }; | |
344 | MODULE_DEVICE_TABLE(i2c, ak881x_id); | |
345 | ||
346 | static struct i2c_driver ak881x_i2c_driver = { | |
347 | .driver = { | |
348 | .name = "ak881x", | |
349 | }, | |
350 | .probe = ak881x_probe, | |
351 | .remove = ak881x_remove, | |
352 | .id_table = ak881x_id, | |
353 | }; | |
354 | ||
c6e8d86f | 355 | module_i2c_driver(ak881x_i2c_driver); |
aec11e5d GL |
356 | |
357 | MODULE_DESCRIPTION("TV-output driver for ak8813/ak8814"); | |
358 | MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>"); | |
359 | MODULE_LICENSE("GPL v2"); |