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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> | |
14 | #include <linux/videodev2.h> | |
15 | ||
16 | #include <media/ak881x.h> | |
17 | #include <media/v4l2-chip-ident.h> | |
18 | #include <media/v4l2-common.h> | |
19 | #include <media/v4l2-device.h> | |
20 | ||
21 | #define AK881X_INTERFACE_MODE 0 | |
22 | #define AK881X_VIDEO_PROCESS1 1 | |
23 | #define AK881X_VIDEO_PROCESS2 2 | |
24 | #define AK881X_VIDEO_PROCESS3 3 | |
25 | #define AK881X_DAC_MODE 5 | |
26 | #define AK881X_STATUS 0x24 | |
27 | #define AK881X_DEVICE_ID 0x25 | |
28 | #define AK881X_DEVICE_REVISION 0x26 | |
29 | ||
30 | struct ak881x { | |
31 | struct v4l2_subdev subdev; | |
32 | struct ak881x_pdata *pdata; | |
33 | unsigned int lines; | |
34 | int id; /* DEVICE_ID code V4L2_IDENT_AK881X code from v4l2-chip-ident.h */ | |
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 | ||
63 | static int ak881x_g_chip_ident(struct v4l2_subdev *sd, | |
64 | struct v4l2_dbg_chip_ident *id) | |
65 | { | |
66 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
67 | struct ak881x *ak881x = to_ak881x(client); | |
68 | ||
69 | if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) | |
70 | return -EINVAL; | |
71 | ||
72 | if (id->match.addr != client->addr) | |
73 | return -ENODEV; | |
74 | ||
75 | id->ident = ak881x->id; | |
76 | id->revision = ak881x->revision; | |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
81 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
82 | static int ak881x_g_register(struct v4l2_subdev *sd, | |
83 | struct v4l2_dbg_register *reg) | |
84 | { | |
85 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
86 | ||
87 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0x26) | |
88 | return -EINVAL; | |
89 | ||
90 | if (reg->match.addr != client->addr) | |
91 | return -ENODEV; | |
92 | ||
93 | reg->val = reg_read(client, reg->reg); | |
94 | ||
95 | if (reg->val > 0xffff) | |
96 | return -EIO; | |
97 | ||
98 | return 0; | |
99 | } | |
100 | ||
101 | static int ak881x_s_register(struct v4l2_subdev *sd, | |
102 | struct v4l2_dbg_register *reg) | |
103 | { | |
104 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
105 | ||
106 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0x26) | |
107 | return -EINVAL; | |
108 | ||
109 | if (reg->match.addr != client->addr) | |
110 | return -ENODEV; | |
111 | ||
112 | if (reg_write(client, reg->reg, reg->val) < 0) | |
113 | return -EIO; | |
114 | ||
115 | return 0; | |
116 | } | |
117 | #endif | |
118 | ||
119 | static int ak881x_try_g_mbus_fmt(struct v4l2_subdev *sd, | |
120 | struct v4l2_mbus_framefmt *mf) | |
121 | { | |
122 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
123 | struct ak881x *ak881x = to_ak881x(client); | |
124 | ||
125 | v4l_bound_align_image(&mf->width, 0, 720, 2, | |
126 | &mf->height, 0, ak881x->lines, 1, 0); | |
127 | mf->field = V4L2_FIELD_INTERLACED; | |
128 | mf->code = V4L2_MBUS_FMT_YUYV8_2X8_LE; | |
129 | mf->colorspace = V4L2_COLORSPACE_SMPTE170M; | |
130 | ||
131 | return 0; | |
132 | } | |
133 | ||
134 | static int ak881x_s_mbus_fmt(struct v4l2_subdev *sd, | |
135 | struct v4l2_mbus_framefmt *mf) | |
136 | { | |
137 | if (mf->field != V4L2_FIELD_INTERLACED || | |
138 | mf->code != V4L2_MBUS_FMT_YUYV8_2X8_LE) | |
139 | return -EINVAL; | |
140 | ||
141 | return ak881x_try_g_mbus_fmt(sd, mf); | |
142 | } | |
143 | ||
3805f201 | 144 | static int ak881x_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned int index, |
aec11e5d GL |
145 | enum v4l2_mbus_pixelcode *code) |
146 | { | |
147 | if (index) | |
148 | return -EINVAL; | |
149 | ||
150 | *code = V4L2_MBUS_FMT_YUYV8_2X8_LE; | |
151 | return 0; | |
152 | } | |
153 | ||
154 | static int ak881x_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) | |
155 | { | |
156 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
157 | struct ak881x *ak881x = to_ak881x(client); | |
158 | ||
159 | a->bounds.left = 0; | |
160 | a->bounds.top = 0; | |
161 | a->bounds.width = 720; | |
162 | a->bounds.height = ak881x->lines; | |
163 | a->defrect = a->bounds; | |
164 | a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; | |
165 | a->pixelaspect.numerator = 1; | |
166 | a->pixelaspect.denominator = 1; | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | static int ak881x_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) | |
172 | { | |
173 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
174 | struct ak881x *ak881x = to_ak881x(client); | |
175 | u8 vp1; | |
176 | ||
177 | if (std == V4L2_STD_NTSC_443) { | |
178 | vp1 = 3; | |
179 | ak881x->lines = 480; | |
180 | } else if (std == V4L2_STD_PAL_M) { | |
181 | vp1 = 5; | |
182 | ak881x->lines = 480; | |
183 | } else if (std == V4L2_STD_PAL_60) { | |
184 | vp1 = 7; | |
185 | ak881x->lines = 480; | |
186 | } else if (std && !(std & ~V4L2_STD_PAL)) { | |
187 | vp1 = 0xf; | |
188 | ak881x->lines = 576; | |
189 | } else if (std && !(std & ~V4L2_STD_NTSC)) { | |
190 | vp1 = 0; | |
191 | ak881x->lines = 480; | |
192 | } else { | |
193 | /* No SECAM or PAL_N/Nc supported */ | |
194 | return -EINVAL; | |
195 | } | |
196 | ||
197 | reg_set(client, AK881X_VIDEO_PROCESS1, vp1, 0xf); | |
198 | ||
199 | return 0; | |
200 | } | |
201 | ||
202 | static int ak881x_s_stream(struct v4l2_subdev *sd, int enable) | |
203 | { | |
204 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
205 | struct ak881x *ak881x = to_ak881x(client); | |
206 | ||
207 | if (enable) { | |
208 | u8 dac; | |
209 | /* For colour-bar testing set bit 6 of AK881X_VIDEO_PROCESS1 */ | |
210 | /* Default: composite output */ | |
211 | if (ak881x->pdata->flags & AK881X_COMPONENT) | |
212 | dac = 3; | |
213 | else | |
214 | dac = 4; | |
215 | /* Turn on the DAC(s) */ | |
216 | reg_write(client, AK881X_DAC_MODE, dac); | |
217 | dev_dbg(&client->dev, "chip status 0x%x\n", | |
218 | reg_read(client, AK881X_STATUS)); | |
219 | } else { | |
220 | /* ...and clear bit 6 of AK881X_VIDEO_PROCESS1 here */ | |
221 | reg_write(client, AK881X_DAC_MODE, 0); | |
222 | dev_dbg(&client->dev, "chip status 0x%x\n", | |
223 | reg_read(client, AK881X_STATUS)); | |
224 | } | |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
229 | static struct v4l2_subdev_core_ops ak881x_subdev_core_ops = { | |
230 | .g_chip_ident = ak881x_g_chip_ident, | |
231 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
232 | .g_register = ak881x_g_register, | |
233 | .s_register = ak881x_s_register, | |
234 | #endif | |
235 | }; | |
236 | ||
237 | static struct v4l2_subdev_video_ops ak881x_subdev_video_ops = { | |
238 | .s_mbus_fmt = ak881x_s_mbus_fmt, | |
239 | .g_mbus_fmt = ak881x_try_g_mbus_fmt, | |
240 | .try_mbus_fmt = ak881x_try_g_mbus_fmt, | |
241 | .cropcap = ak881x_cropcap, | |
242 | .enum_mbus_fmt = ak881x_enum_mbus_fmt, | |
243 | .s_std_output = ak881x_s_std_output, | |
244 | .s_stream = ak881x_s_stream, | |
245 | }; | |
246 | ||
247 | static struct v4l2_subdev_ops ak881x_subdev_ops = { | |
248 | .core = &ak881x_subdev_core_ops, | |
249 | .video = &ak881x_subdev_video_ops, | |
250 | }; | |
251 | ||
252 | static int ak881x_probe(struct i2c_client *client, | |
253 | const struct i2c_device_id *did) | |
254 | { | |
255 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); | |
256 | struct ak881x *ak881x; | |
257 | u8 ifmode, data; | |
258 | ||
259 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { | |
260 | dev_warn(&adapter->dev, | |
261 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
262 | return -EIO; | |
263 | } | |
264 | ||
265 | ak881x = kzalloc(sizeof(struct ak881x), GFP_KERNEL); | |
266 | if (!ak881x) | |
267 | return -ENOMEM; | |
268 | ||
269 | v4l2_i2c_subdev_init(&ak881x->subdev, client, &ak881x_subdev_ops); | |
270 | ||
271 | data = reg_read(client, AK881X_DEVICE_ID); | |
272 | ||
273 | switch (data) { | |
274 | case 0x13: | |
275 | ak881x->id = V4L2_IDENT_AK8813; | |
276 | break; | |
277 | case 0x14: | |
278 | ak881x->id = V4L2_IDENT_AK8814; | |
279 | break; | |
280 | default: | |
281 | dev_err(&client->dev, | |
282 | "No ak881x chip detected, register read %x\n", data); | |
283 | kfree(ak881x); | |
284 | return -ENODEV; | |
285 | } | |
286 | ||
287 | ak881x->revision = reg_read(client, AK881X_DEVICE_REVISION); | |
288 | ak881x->pdata = client->dev.platform_data; | |
289 | ||
290 | if (ak881x->pdata) { | |
291 | if (ak881x->pdata->flags & AK881X_FIELD) | |
292 | ifmode = 4; | |
293 | else | |
294 | ifmode = 0; | |
295 | ||
296 | switch (ak881x->pdata->flags & AK881X_IF_MODE_MASK) { | |
297 | case AK881X_IF_MODE_BT656: | |
298 | ifmode |= 1; | |
299 | break; | |
300 | case AK881X_IF_MODE_MASTER: | |
301 | ifmode |= 2; | |
302 | break; | |
303 | case AK881X_IF_MODE_SLAVE: | |
304 | default: | |
305 | break; | |
306 | } | |
307 | ||
308 | dev_dbg(&client->dev, "IF mode %x\n", ifmode); | |
309 | ||
310 | /* | |
311 | * "Line Blanking No." seems to be the same as the number of | |
312 | * "black" lines on, e.g., SuperH VOU, whose default value of 20 | |
313 | * "incidentally" matches ak881x' default | |
314 | */ | |
315 | reg_write(client, AK881X_INTERFACE_MODE, ifmode | (20 << 3)); | |
316 | } | |
317 | ||
318 | /* Hardware default: NTSC-M */ | |
319 | ak881x->lines = 480; | |
320 | ||
321 | dev_info(&client->dev, "Detected an ak881x chip ID %x, revision %x\n", | |
322 | data, ak881x->revision); | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
327 | static int ak881x_remove(struct i2c_client *client) | |
328 | { | |
329 | struct ak881x *ak881x = to_ak881x(client); | |
330 | ||
331 | v4l2_device_unregister_subdev(&ak881x->subdev); | |
332 | kfree(ak881x); | |
333 | ||
334 | return 0; | |
335 | } | |
336 | ||
337 | static const struct i2c_device_id ak881x_id[] = { | |
338 | { "ak8813", 0 }, | |
339 | { "ak8814", 0 }, | |
340 | { } | |
341 | }; | |
342 | MODULE_DEVICE_TABLE(i2c, ak881x_id); | |
343 | ||
344 | static struct i2c_driver ak881x_i2c_driver = { | |
345 | .driver = { | |
346 | .name = "ak881x", | |
347 | }, | |
348 | .probe = ak881x_probe, | |
349 | .remove = ak881x_remove, | |
350 | .id_table = ak881x_id, | |
351 | }; | |
352 | ||
353 | static int __init ak881x_module_init(void) | |
354 | { | |
355 | return i2c_add_driver(&ak881x_i2c_driver); | |
356 | } | |
357 | ||
358 | static void __exit ak881x_module_exit(void) | |
359 | { | |
360 | i2c_del_driver(&ak881x_i2c_driver); | |
361 | } | |
362 | ||
363 | module_init(ak881x_module_init); | |
364 | module_exit(ak881x_module_exit); | |
365 | ||
366 | MODULE_DESCRIPTION("TV-output driver for ak8813/ak8814"); | |
367 | MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>"); | |
368 | MODULE_LICENSE("GPL v2"); |