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11#include <linux/i2c.h>
12#include <linux/init.h>
13#include <linux/platform_device.h>
14#include <linux/slab.h>
15#include <linux/videodev2.h>
16#include <linux/module.h>
17
18#include <media/ak881x.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
31struct ak881x {
32 struct v4l2_subdev subdev;
33 struct ak881x_pdata *pdata;
34 unsigned int lines;
35 char revision;
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
63#ifdef CONFIG_VIDEO_ADV_DEBUG
64static 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
69 if (reg->reg > 0x26)
70 return -EINVAL;
71
72 reg->size = 1;
73 reg->val = reg_read(client, reg->reg);
74
75 if (reg->val > 0xffff)
76 return -EIO;
77
78 return 0;
79}
80
81static int ak881x_s_register(struct v4l2_subdev *sd,
82 const struct v4l2_dbg_register *reg)
83{
84 struct i2c_client *client = v4l2_get_subdevdata(sd);
85
86 if (reg->reg > 0x26)
87 return -EINVAL;
88
89 if (reg_write(client, reg->reg, reg->val) < 0)
90 return -EIO;
91
92 return 0;
93}
94#endif
95
96static int ak881x_fill_fmt(struct v4l2_subdev *sd,
97 struct v4l2_subdev_pad_config *cfg,
98 struct v4l2_subdev_format *format)
99{
100 struct v4l2_mbus_framefmt *mf = &format->format;
101 struct i2c_client *client = v4l2_get_subdevdata(sd);
102 struct ak881x *ak881x = to_ak881x(client);
103
104 if (format->pad)
105 return -EINVAL;
106
107 v4l_bound_align_image(&mf->width, 0, 720, 2,
108 &mf->height, 0, ak881x->lines, 1, 0);
109 mf->field = V4L2_FIELD_INTERLACED;
110 mf->code = MEDIA_BUS_FMT_YUYV8_2X8;
111 mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
112
113 return 0;
114}
115
116static int ak881x_enum_mbus_code(struct v4l2_subdev *sd,
117 struct v4l2_subdev_pad_config *cfg,
118 struct v4l2_subdev_mbus_code_enum *code)
119{
120 if (code->pad || code->index)
121 return -EINVAL;
122
123 code->code = MEDIA_BUS_FMT_YUYV8_2X8;
124 return 0;
125}
126
127static int ak881x_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
128{
129 struct i2c_client *client = v4l2_get_subdevdata(sd);
130 struct ak881x *ak881x = to_ak881x(client);
131
132 a->bounds.left = 0;
133 a->bounds.top = 0;
134 a->bounds.width = 720;
135 a->bounds.height = ak881x->lines;
136 a->defrect = a->bounds;
137 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
138 a->pixelaspect.numerator = 1;
139 a->pixelaspect.denominator = 1;
140
141 return 0;
142}
143
144static int ak881x_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
145{
146 struct i2c_client *client = v4l2_get_subdevdata(sd);
147 struct ak881x *ak881x = to_ak881x(client);
148 u8 vp1;
149
150 if (std == V4L2_STD_NTSC_443) {
151 vp1 = 3;
152 ak881x->lines = 480;
153 } else if (std == V4L2_STD_PAL_M) {
154 vp1 = 5;
155 ak881x->lines = 480;
156 } else if (std == V4L2_STD_PAL_60) {
157 vp1 = 7;
158 ak881x->lines = 480;
159 } else if (std & V4L2_STD_NTSC) {
160 vp1 = 0;
161 ak881x->lines = 480;
162 } else if (std & V4L2_STD_PAL) {
163 vp1 = 0xf;
164 ak881x->lines = 576;
165 } else {
166
167 return -EINVAL;
168 }
169
170 reg_set(client, AK881X_VIDEO_PROCESS1, vp1, 0xf);
171
172 return 0;
173}
174
175static int ak881x_s_stream(struct v4l2_subdev *sd, int enable)
176{
177 struct i2c_client *client = v4l2_get_subdevdata(sd);
178 struct ak881x *ak881x = to_ak881x(client);
179
180 if (enable) {
181 u8 dac;
182
183
184 if (ak881x->pdata->flags & AK881X_COMPONENT)
185 dac = 3;
186 else
187 dac = 4;
188
189 reg_write(client, AK881X_DAC_MODE, dac);
190 dev_dbg(&client->dev, "chip status 0x%x\n",
191 reg_read(client, AK881X_STATUS));
192 } else {
193
194 reg_write(client, AK881X_DAC_MODE, 0);
195 dev_dbg(&client->dev, "chip status 0x%x\n",
196 reg_read(client, AK881X_STATUS));
197 }
198
199 return 0;
200}
201
202static struct v4l2_subdev_core_ops ak881x_subdev_core_ops = {
203#ifdef CONFIG_VIDEO_ADV_DEBUG
204 .g_register = ak881x_g_register,
205 .s_register = ak881x_s_register,
206#endif
207};
208
209static struct v4l2_subdev_video_ops ak881x_subdev_video_ops = {
210 .cropcap = ak881x_cropcap,
211 .s_std_output = ak881x_s_std_output,
212 .s_stream = ak881x_s_stream,
213};
214
215static const struct v4l2_subdev_pad_ops ak881x_subdev_pad_ops = {
216 .enum_mbus_code = ak881x_enum_mbus_code,
217 .set_fmt = ak881x_fill_fmt,
218 .get_fmt = ak881x_fill_fmt,
219};
220
221static struct v4l2_subdev_ops ak881x_subdev_ops = {
222 .core = &ak881x_subdev_core_ops,
223 .video = &ak881x_subdev_video_ops,
224 .pad = &ak881x_subdev_pad_ops,
225};
226
227static int ak881x_probe(struct i2c_client *client,
228 const struct i2c_device_id *did)
229{
230 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
231 struct ak881x *ak881x;
232 u8 ifmode, data;
233
234 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
235 dev_warn(&adapter->dev,
236 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
237 return -EIO;
238 }
239
240 ak881x = devm_kzalloc(&client->dev, sizeof(*ak881x), GFP_KERNEL);
241 if (!ak881x)
242 return -ENOMEM;
243
244 v4l2_i2c_subdev_init(&ak881x->subdev, client, &ak881x_subdev_ops);
245
246 data = reg_read(client, AK881X_DEVICE_ID);
247
248 switch (data) {
249 case 0x13:
250 case 0x14:
251 break;
252 default:
253 dev_err(&client->dev,
254 "No ak881x chip detected, register read %x\n", data);
255 return -ENODEV;
256 }
257
258 ak881x->revision = reg_read(client, AK881X_DEVICE_REVISION);
259 ak881x->pdata = client->dev.platform_data;
260
261 if (ak881x->pdata) {
262 if (ak881x->pdata->flags & AK881X_FIELD)
263 ifmode = 4;
264 else
265 ifmode = 0;
266
267 switch (ak881x->pdata->flags & AK881X_IF_MODE_MASK) {
268 case AK881X_IF_MODE_BT656:
269 ifmode |= 1;
270 break;
271 case AK881X_IF_MODE_MASTER:
272 ifmode |= 2;
273 break;
274 case AK881X_IF_MODE_SLAVE:
275 default:
276 break;
277 }
278
279 dev_dbg(&client->dev, "IF mode %x\n", ifmode);
280
281
282
283
284
285
286 reg_write(client, AK881X_INTERFACE_MODE, ifmode | (20 << 3));
287 }
288
289
290 ak881x->lines = 480;
291
292 dev_info(&client->dev, "Detected an ak881x chip ID %x, revision %x\n",
293 data, ak881x->revision);
294
295 return 0;
296}
297
298static int ak881x_remove(struct i2c_client *client)
299{
300 struct ak881x *ak881x = to_ak881x(client);
301
302 v4l2_device_unregister_subdev(&ak881x->subdev);
303
304 return 0;
305}
306
307static const struct i2c_device_id ak881x_id[] = {
308 { "ak8813", 0 },
309 { "ak8814", 0 },
310 { }
311};
312MODULE_DEVICE_TABLE(i2c, ak881x_id);
313
314static struct i2c_driver ak881x_i2c_driver = {
315 .driver = {
316 .name = "ak881x",
317 },
318 .probe = ak881x_probe,
319 .remove = ak881x_remove,
320 .id_table = ak881x_id,
321};
322
323module_i2c_driver(ak881x_i2c_driver);
324
325MODULE_DESCRIPTION("TV-output driver for ak8813/ak8814");
326MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
327MODULE_LICENSE("GPL v2");
328
