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authorGuennadi Liakhovetski <lyakh@axis700.grange>2010-03-29 03:45:22 -0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2010-05-19 11:58:02 -0400
commitaec11e5d495a6c9b10ded81dde5b0e42b0875541 (patch)
treec57f57d1dc588dc2e0ac6c5c60f4e0435a1e1dec /drivers/media/video/ak881x.c
parenta81fb9b223508f5773d8d7e226b1574d1b068642 (diff)
V4L/DVB: V4L: v4l2-subdev driver for AK8813 and AK8814 TV-encoders from AKM
AK8814 only differs from AK8813 by included Macrovision Copy Protection function. This patch adds a driver for AK8813 and AK8814 I2C PAL/NTSC TV encoders. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/ak881x.c')
-rw-r--r--drivers/media/video/ak881x.c368
1 files changed, 368 insertions, 0 deletions
diff --git a/drivers/media/video/ak881x.c b/drivers/media/video/ak881x.c
new file mode 100644
index 000000000000..35390d4717b9
--- /dev/null
+++ b/drivers/media/video/ak881x.c
@@ -0,0 +1,368 @@
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
30struct 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
38static int reg_read(struct i2c_client *client, const u8 reg)
39{
40 return i2c_smbus_read_byte_data(client, reg);
41}
42
43static 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
49static 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
58static struct ak881x *to_ak881x(const struct i2c_client *client)
59{
60 return container_of(i2c_get_clientdata(client), struct ak881x, subdev);
61}
62
63static 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
82static 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
101static 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
119static 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
134static 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
144static int ak881x_enum_mbus_fmt(struct v4l2_subdev *sd, int index,
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
154static 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
171static 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
202static 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
229static 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
237static 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
247static struct v4l2_subdev_ops ak881x_subdev_ops = {
248 .core = &ak881x_subdev_core_ops,
249 .video = &ak881x_subdev_video_ops,
250};
251
252static 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
327static 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
337static const struct i2c_device_id ak881x_id[] = {
338 { "ak8813", 0 },
339 { "ak8814", 0 },
340 { }
341};
342MODULE_DEVICE_TABLE(i2c, ak881x_id);
343
344static 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
353static int __init ak881x_module_init(void)
354{
355 return i2c_add_driver(&ak881x_i2c_driver);
356}
357
358static void __exit ak881x_module_exit(void)
359{
360 i2c_del_driver(&ak881x_i2c_driver);
361}
362
363module_init(ak881x_module_init);
364module_exit(ak881x_module_exit);
365
366MODULE_DESCRIPTION("TV-output driver for ak8813/ak8814");
367MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
368MODULE_LICENSE("GPL v2");