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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 GL |
15 | #include <linux/videodev2.h> |
16 | ||
17 | #include <media/ak881x.h> | |
18 | #include <media/v4l2-chip-ident.h> | |
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; | |
35 | int id; /* DEVICE_ID code V4L2_IDENT_AK881X code from v4l2-chip-ident.h */ | |
36 | char revision; /* DEVICE_REVISION content */ | |
37 | }; | |
38 | ||
39 | static int reg_read(struct i2c_client *client, const u8 reg) | |
40 | { | |
41 | return i2c_smbus_read_byte_data(client, reg); | |
42 | } | |
43 | ||
44 | static int reg_write(struct i2c_client *client, const u8 reg, | |
45 | const u8 data) | |
46 | { | |
47 | return i2c_smbus_write_byte_data(client, reg, data); | |
48 | } | |
49 | ||
50 | static int reg_set(struct i2c_client *client, const u8 reg, | |
51 | const u8 data, u8 mask) | |
52 | { | |
53 | int ret = reg_read(client, reg); | |
54 | if (ret < 0) | |
55 | return ret; | |
56 | return reg_write(client, reg, (ret & ~mask) | (data & mask)); | |
57 | } | |
58 | ||
59 | static struct ak881x *to_ak881x(const struct i2c_client *client) | |
60 | { | |
61 | return container_of(i2c_get_clientdata(client), struct ak881x, subdev); | |
62 | } | |
63 | ||
64 | static int ak881x_g_chip_ident(struct v4l2_subdev *sd, | |
65 | struct v4l2_dbg_chip_ident *id) | |
66 | { | |
67 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
68 | struct ak881x *ak881x = to_ak881x(client); | |
69 | ||
70 | if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR) | |
71 | return -EINVAL; | |
72 | ||
73 | if (id->match.addr != client->addr) | |
74 | return -ENODEV; | |
75 | ||
76 | id->ident = ak881x->id; | |
77 | id->revision = ak881x->revision; | |
78 | ||
79 | return 0; | |
80 | } | |
81 | ||
82 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
83 | static int ak881x_g_register(struct v4l2_subdev *sd, | |
84 | struct v4l2_dbg_register *reg) | |
85 | { | |
86 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
87 | ||
88 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0x26) | |
89 | return -EINVAL; | |
90 | ||
91 | if (reg->match.addr != client->addr) | |
92 | return -ENODEV; | |
93 | ||
94 | reg->val = reg_read(client, reg->reg); | |
95 | ||
96 | if (reg->val > 0xffff) | |
97 | return -EIO; | |
98 | ||
99 | return 0; | |
100 | } | |
101 | ||
102 | static int ak881x_s_register(struct v4l2_subdev *sd, | |
103 | struct v4l2_dbg_register *reg) | |
104 | { | |
105 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
106 | ||
107 | if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0x26) | |
108 | return -EINVAL; | |
109 | ||
110 | if (reg->match.addr != client->addr) | |
111 | return -ENODEV; | |
112 | ||
113 | if (reg_write(client, reg->reg, reg->val) < 0) | |
114 | return -EIO; | |
115 | ||
116 | return 0; | |
117 | } | |
118 | #endif | |
119 | ||
120 | static int ak881x_try_g_mbus_fmt(struct v4l2_subdev *sd, | |
121 | struct v4l2_mbus_framefmt *mf) | |
122 | { | |
123 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
124 | struct ak881x *ak881x = to_ak881x(client); | |
125 | ||
126 | v4l_bound_align_image(&mf->width, 0, 720, 2, | |
127 | &mf->height, 0, ak881x->lines, 1, 0); | |
128 | mf->field = V4L2_FIELD_INTERLACED; | |
ace6e979 | 129 | mf->code = V4L2_MBUS_FMT_YUYV8_2X8; |
aec11e5d GL |
130 | mf->colorspace = V4L2_COLORSPACE_SMPTE170M; |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | static int ak881x_s_mbus_fmt(struct v4l2_subdev *sd, | |
136 | struct v4l2_mbus_framefmt *mf) | |
137 | { | |
138 | if (mf->field != V4L2_FIELD_INTERLACED || | |
ace6e979 | 139 | mf->code != V4L2_MBUS_FMT_YUYV8_2X8) |
aec11e5d GL |
140 | return -EINVAL; |
141 | ||
142 | return ak881x_try_g_mbus_fmt(sd, mf); | |
143 | } | |
144 | ||
3805f201 | 145 | static int ak881x_enum_mbus_fmt(struct v4l2_subdev *sd, unsigned int index, |
aec11e5d GL |
146 | enum v4l2_mbus_pixelcode *code) |
147 | { | |
148 | if (index) | |
149 | return -EINVAL; | |
150 | ||
ace6e979 | 151 | *code = V4L2_MBUS_FMT_YUYV8_2X8; |
aec11e5d GL |
152 | return 0; |
153 | } | |
154 | ||
155 | static int ak881x_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a) | |
156 | { | |
157 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
158 | struct ak881x *ak881x = to_ak881x(client); | |
159 | ||
160 | a->bounds.left = 0; | |
161 | a->bounds.top = 0; | |
162 | a->bounds.width = 720; | |
163 | a->bounds.height = ak881x->lines; | |
164 | a->defrect = a->bounds; | |
165 | a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; | |
166 | a->pixelaspect.numerator = 1; | |
167 | a->pixelaspect.denominator = 1; | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | static int ak881x_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) | |
173 | { | |
174 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
175 | struct ak881x *ak881x = to_ak881x(client); | |
176 | u8 vp1; | |
177 | ||
178 | if (std == V4L2_STD_NTSC_443) { | |
179 | vp1 = 3; | |
180 | ak881x->lines = 480; | |
181 | } else if (std == V4L2_STD_PAL_M) { | |
182 | vp1 = 5; | |
183 | ak881x->lines = 480; | |
184 | } else if (std == V4L2_STD_PAL_60) { | |
185 | vp1 = 7; | |
186 | ak881x->lines = 480; | |
187 | } else if (std && !(std & ~V4L2_STD_PAL)) { | |
188 | vp1 = 0xf; | |
189 | ak881x->lines = 576; | |
190 | } else if (std && !(std & ~V4L2_STD_NTSC)) { | |
191 | vp1 = 0; | |
192 | ak881x->lines = 480; | |
193 | } else { | |
194 | /* No SECAM or PAL_N/Nc supported */ | |
195 | return -EINVAL; | |
196 | } | |
197 | ||
198 | reg_set(client, AK881X_VIDEO_PROCESS1, vp1, 0xf); | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
203 | static int ak881x_s_stream(struct v4l2_subdev *sd, int enable) | |
204 | { | |
205 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
206 | struct ak881x *ak881x = to_ak881x(client); | |
207 | ||
208 | if (enable) { | |
209 | u8 dac; | |
210 | /* For colour-bar testing set bit 6 of AK881X_VIDEO_PROCESS1 */ | |
211 | /* Default: composite output */ | |
212 | if (ak881x->pdata->flags & AK881X_COMPONENT) | |
213 | dac = 3; | |
214 | else | |
215 | dac = 4; | |
216 | /* Turn on the DAC(s) */ | |
217 | reg_write(client, AK881X_DAC_MODE, dac); | |
218 | dev_dbg(&client->dev, "chip status 0x%x\n", | |
219 | reg_read(client, AK881X_STATUS)); | |
220 | } else { | |
221 | /* ...and clear bit 6 of AK881X_VIDEO_PROCESS1 here */ | |
222 | reg_write(client, AK881X_DAC_MODE, 0); | |
223 | dev_dbg(&client->dev, "chip status 0x%x\n", | |
224 | reg_read(client, AK881X_STATUS)); | |
225 | } | |
226 | ||
227 | return 0; | |
228 | } | |
229 | ||
230 | static struct v4l2_subdev_core_ops ak881x_subdev_core_ops = { | |
231 | .g_chip_ident = ak881x_g_chip_ident, | |
232 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
233 | .g_register = ak881x_g_register, | |
234 | .s_register = ak881x_s_register, | |
235 | #endif | |
236 | }; | |
237 | ||
238 | static struct v4l2_subdev_video_ops ak881x_subdev_video_ops = { | |
239 | .s_mbus_fmt = ak881x_s_mbus_fmt, | |
240 | .g_mbus_fmt = ak881x_try_g_mbus_fmt, | |
241 | .try_mbus_fmt = ak881x_try_g_mbus_fmt, | |
242 | .cropcap = ak881x_cropcap, | |
243 | .enum_mbus_fmt = ak881x_enum_mbus_fmt, | |
244 | .s_std_output = ak881x_s_std_output, | |
245 | .s_stream = ak881x_s_stream, | |
246 | }; | |
247 | ||
248 | static struct v4l2_subdev_ops ak881x_subdev_ops = { | |
249 | .core = &ak881x_subdev_core_ops, | |
250 | .video = &ak881x_subdev_video_ops, | |
251 | }; | |
252 | ||
253 | static int ak881x_probe(struct i2c_client *client, | |
254 | const struct i2c_device_id *did) | |
255 | { | |
256 | struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent); | |
257 | struct ak881x *ak881x; | |
258 | u8 ifmode, data; | |
259 | ||
260 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) { | |
261 | dev_warn(&adapter->dev, | |
262 | "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n"); | |
263 | return -EIO; | |
264 | } | |
265 | ||
266 | ak881x = kzalloc(sizeof(struct ak881x), GFP_KERNEL); | |
267 | if (!ak881x) | |
268 | return -ENOMEM; | |
269 | ||
270 | v4l2_i2c_subdev_init(&ak881x->subdev, client, &ak881x_subdev_ops); | |
271 | ||
272 | data = reg_read(client, AK881X_DEVICE_ID); | |
273 | ||
274 | switch (data) { | |
275 | case 0x13: | |
276 | ak881x->id = V4L2_IDENT_AK8813; | |
277 | break; | |
278 | case 0x14: | |
279 | ak881x->id = V4L2_IDENT_AK8814; | |
280 | break; | |
281 | default: | |
282 | dev_err(&client->dev, | |
283 | "No ak881x chip detected, register read %x\n", data); | |
284 | kfree(ak881x); | |
285 | return -ENODEV; | |
286 | } | |
287 | ||
288 | ak881x->revision = reg_read(client, AK881X_DEVICE_REVISION); | |
289 | ak881x->pdata = client->dev.platform_data; | |
290 | ||
291 | if (ak881x->pdata) { | |
292 | if (ak881x->pdata->flags & AK881X_FIELD) | |
293 | ifmode = 4; | |
294 | else | |
295 | ifmode = 0; | |
296 | ||
297 | switch (ak881x->pdata->flags & AK881X_IF_MODE_MASK) { | |
298 | case AK881X_IF_MODE_BT656: | |
299 | ifmode |= 1; | |
300 | break; | |
301 | case AK881X_IF_MODE_MASTER: | |
302 | ifmode |= 2; | |
303 | break; | |
304 | case AK881X_IF_MODE_SLAVE: | |
305 | default: | |
306 | break; | |
307 | } | |
308 | ||
309 | dev_dbg(&client->dev, "IF mode %x\n", ifmode); | |
310 | ||
311 | /* | |
312 | * "Line Blanking No." seems to be the same as the number of | |
313 | * "black" lines on, e.g., SuperH VOU, whose default value of 20 | |
314 | * "incidentally" matches ak881x' default | |
315 | */ | |
316 | reg_write(client, AK881X_INTERFACE_MODE, ifmode | (20 << 3)); | |
317 | } | |
318 | ||
319 | /* Hardware default: NTSC-M */ | |
320 | ak881x->lines = 480; | |
321 | ||
322 | dev_info(&client->dev, "Detected an ak881x chip ID %x, revision %x\n", | |
323 | data, ak881x->revision); | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
328 | static int ak881x_remove(struct i2c_client *client) | |
329 | { | |
330 | struct ak881x *ak881x = to_ak881x(client); | |
331 | ||
332 | v4l2_device_unregister_subdev(&ak881x->subdev); | |
333 | kfree(ak881x); | |
334 | ||
335 | return 0; | |
336 | } | |
337 | ||
338 | static const struct i2c_device_id ak881x_id[] = { | |
339 | { "ak8813", 0 }, | |
340 | { "ak8814", 0 }, | |
341 | { } | |
342 | }; | |
343 | MODULE_DEVICE_TABLE(i2c, ak881x_id); | |
344 | ||
345 | static struct i2c_driver ak881x_i2c_driver = { | |
346 | .driver = { | |
347 | .name = "ak881x", | |
348 | }, | |
349 | .probe = ak881x_probe, | |
350 | .remove = ak881x_remove, | |
351 | .id_table = ak881x_id, | |
352 | }; | |
353 | ||
354 | static int __init ak881x_module_init(void) | |
355 | { | |
356 | return i2c_add_driver(&ak881x_i2c_driver); | |
357 | } | |
358 | ||
359 | static void __exit ak881x_module_exit(void) | |
360 | { | |
361 | i2c_del_driver(&ak881x_i2c_driver); | |
362 | } | |
363 | ||
364 | module_init(ak881x_module_init); | |
365 | module_exit(ak881x_module_exit); | |
366 | ||
367 | MODULE_DESCRIPTION("TV-output driver for ak8813/ak8814"); | |
368 | MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>"); | |
369 | MODULE_LICENSE("GPL v2"); |