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8#include <linux/i2c.h>
9#include <linux/init.h>
10#include <linux/platform_device.h>
11#include <linux/slab.h>
12#include <linux/videodev2.h>
13#include <linux/module.h>
14
15#include <media/i2c/ak881x.h>
16#include <media/v4l2-common.h>
17#include <media/v4l2-device.h>
18
19#define AK881X_INTERFACE_MODE 0
20#define AK881X_VIDEO_PROCESS1 1
21#define AK881X_VIDEO_PROCESS2 2
22#define AK881X_VIDEO_PROCESS3 3
23#define AK881X_DAC_MODE 5
24#define AK881X_STATUS 0x24
25#define AK881X_DEVICE_ID 0x25
26#define AK881X_DEVICE_REVISION 0x26
27
28struct ak881x {
29 struct v4l2_subdev subdev;
30 struct ak881x_pdata *pdata;
31 unsigned int lines;
32 char revision;
33};
34
35static int reg_read(struct i2c_client *client, const u8 reg)
36{
37 return i2c_smbus_read_byte_data(client, reg);
38}
39
40static int reg_write(struct i2c_client *client, const u8 reg,
41 const u8 data)
42{
43 return i2c_smbus_write_byte_data(client, reg, data);
44}
45
46static int reg_set(struct i2c_client *client, const u8 reg,
47 const u8 data, u8 mask)
48{
49 int ret = reg_read(client, reg);
50 if (ret < 0)
51 return ret;
52 return reg_write(client, reg, (ret & ~mask) | (data & mask));
53}
54
55static struct ak881x *to_ak881x(const struct i2c_client *client)
56{
57 return container_of(i2c_get_clientdata(client), struct ak881x, subdev);
58}
59
60#ifdef CONFIG_VIDEO_ADV_DEBUG
61static int ak881x_g_register(struct v4l2_subdev *sd,
62 struct v4l2_dbg_register *reg)
63{
64 struct i2c_client *client = v4l2_get_subdevdata(sd);
65
66 if (reg->reg > 0x26)
67 return -EINVAL;
68
69 reg->size = 1;
70 reg->val = reg_read(client, reg->reg);
71
72 if (reg->val > 0xffff)
73 return -EIO;
74
75 return 0;
76}
77
78static int ak881x_s_register(struct v4l2_subdev *sd,
79 const struct v4l2_dbg_register *reg)
80{
81 struct i2c_client *client = v4l2_get_subdevdata(sd);
82
83 if (reg->reg > 0x26)
84 return -EINVAL;
85
86 if (reg_write(client, reg->reg, reg->val) < 0)
87 return -EIO;
88
89 return 0;
90}
91#endif
92
93static int ak881x_fill_fmt(struct v4l2_subdev *sd,
94 struct v4l2_subdev_pad_config *cfg,
95 struct v4l2_subdev_format *format)
96{
97 struct v4l2_mbus_framefmt *mf = &format->format;
98 struct i2c_client *client = v4l2_get_subdevdata(sd);
99 struct ak881x *ak881x = to_ak881x(client);
100
101 if (format->pad)
102 return -EINVAL;
103
104 v4l_bound_align_image(&mf->width, 0, 720, 2,
105 &mf->height, 0, ak881x->lines, 1, 0);
106 mf->field = V4L2_FIELD_INTERLACED;
107 mf->code = MEDIA_BUS_FMT_YUYV8_2X8;
108 mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
109
110 return 0;
111}
112
113static int ak881x_enum_mbus_code(struct v4l2_subdev *sd,
114 struct v4l2_subdev_pad_config *cfg,
115 struct v4l2_subdev_mbus_code_enum *code)
116{
117 if (code->pad || code->index)
118 return -EINVAL;
119
120 code->code = MEDIA_BUS_FMT_YUYV8_2X8;
121 return 0;
122}
123
124static int ak881x_get_selection(struct v4l2_subdev *sd,
125 struct v4l2_subdev_pad_config *cfg,
126 struct v4l2_subdev_selection *sel)
127{
128 struct i2c_client *client = v4l2_get_subdevdata(sd);
129 struct ak881x *ak881x = to_ak881x(client);
130
131 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
132 return -EINVAL;
133
134 switch (sel->target) {
135 case V4L2_SEL_TGT_CROP_BOUNDS:
136 sel->r.left = 0;
137 sel->r.top = 0;
138 sel->r.width = 720;
139 sel->r.height = ak881x->lines;
140 return 0;
141 default:
142 return -EINVAL;
143 }
144}
145
146static int ak881x_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
147{
148 struct i2c_client *client = v4l2_get_subdevdata(sd);
149 struct ak881x *ak881x = to_ak881x(client);
150 u8 vp1;
151
152 if (std == V4L2_STD_NTSC_443) {
153 vp1 = 3;
154 ak881x->lines = 480;
155 } else if (std == V4L2_STD_PAL_M) {
156 vp1 = 5;
157 ak881x->lines = 480;
158 } else if (std == V4L2_STD_PAL_60) {
159 vp1 = 7;
160 ak881x->lines = 480;
161 } else if (std & V4L2_STD_NTSC) {
162 vp1 = 0;
163 ak881x->lines = 480;
164 } else if (std & V4L2_STD_PAL) {
165 vp1 = 0xf;
166 ak881x->lines = 576;
167 } else {
168
169 return -EINVAL;
170 }
171
172 reg_set(client, AK881X_VIDEO_PROCESS1, vp1, 0xf);
173
174 return 0;
175}
176
177static int ak881x_s_stream(struct v4l2_subdev *sd, int enable)
178{
179 struct i2c_client *client = v4l2_get_subdevdata(sd);
180 struct ak881x *ak881x = to_ak881x(client);
181
182 if (enable) {
183 u8 dac;
184
185
186 if (ak881x->pdata->flags & AK881X_COMPONENT)
187 dac = 3;
188 else
189 dac = 4;
190
191 reg_write(client, AK881X_DAC_MODE, dac);
192 dev_dbg(&client->dev, "chip status 0x%x\n",
193 reg_read(client, AK881X_STATUS));
194 } else {
195
196 reg_write(client, AK881X_DAC_MODE, 0);
197 dev_dbg(&client->dev, "chip status 0x%x\n",
198 reg_read(client, AK881X_STATUS));
199 }
200
201 return 0;
202}
203
204static const struct v4l2_subdev_core_ops ak881x_subdev_core_ops = {
205#ifdef CONFIG_VIDEO_ADV_DEBUG
206 .g_register = ak881x_g_register,
207 .s_register = ak881x_s_register,
208#endif
209};
210
211static const struct v4l2_subdev_video_ops ak881x_subdev_video_ops = {
212 .s_std_output = ak881x_s_std_output,
213 .s_stream = ak881x_s_stream,
214};
215
216static const struct v4l2_subdev_pad_ops ak881x_subdev_pad_ops = {
217 .enum_mbus_code = ak881x_enum_mbus_code,
218 .get_selection = ak881x_get_selection,
219 .set_fmt = ak881x_fill_fmt,
220 .get_fmt = ak881x_fill_fmt,
221};
222
223static const struct v4l2_subdev_ops ak881x_subdev_ops = {
224 .core = &ak881x_subdev_core_ops,
225 .video = &ak881x_subdev_video_ops,
226 .pad = &ak881x_subdev_pad_ops,
227};
228
229static int ak881x_probe(struct i2c_client *client,
230 const struct i2c_device_id *did)
231{
232 struct i2c_adapter *adapter = client->adapter;
233 struct ak881x *ak881x;
234 u8 ifmode, data;
235
236 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
237 dev_warn(&adapter->dev,
238 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
239 return -EIO;
240 }
241
242 ak881x = devm_kzalloc(&client->dev, sizeof(*ak881x), GFP_KERNEL);
243 if (!ak881x)
244 return -ENOMEM;
245
246 v4l2_i2c_subdev_init(&ak881x->subdev, client, &ak881x_subdev_ops);
247
248 data = reg_read(client, AK881X_DEVICE_ID);
249
250 switch (data) {
251 case 0x13:
252 case 0x14:
253 break;
254 default:
255 dev_err(&client->dev,
256 "No ak881x chip detected, register read %x\n", data);
257 return -ENODEV;
258 }
259
260 ak881x->revision = reg_read(client, AK881X_DEVICE_REVISION);
261 ak881x->pdata = client->dev.platform_data;
262
263 if (ak881x->pdata) {
264 if (ak881x->pdata->flags & AK881X_FIELD)
265 ifmode = 4;
266 else
267 ifmode = 0;
268
269 switch (ak881x->pdata->flags & AK881X_IF_MODE_MASK) {
270 case AK881X_IF_MODE_BT656:
271 ifmode |= 1;
272 break;
273 case AK881X_IF_MODE_MASTER:
274 ifmode |= 2;
275 break;
276 case AK881X_IF_MODE_SLAVE:
277 default:
278 break;
279 }
280
281 dev_dbg(&client->dev, "IF mode %x\n", ifmode);
282
283
284
285
286
287
288 reg_write(client, AK881X_INTERFACE_MODE, ifmode | (20 << 3));
289 }
290
291
292 ak881x->lines = 480;
293
294 dev_info(&client->dev, "Detected an ak881x chip ID %x, revision %x\n",
295 data, ak881x->revision);
296
297 return 0;
298}
299
300static int ak881x_remove(struct i2c_client *client)
301{
302 struct ak881x *ak881x = to_ak881x(client);
303
304 v4l2_device_unregister_subdev(&ak881x->subdev);
305
306 return 0;
307}
308
309static const struct i2c_device_id ak881x_id[] = {
310 { "ak8813", 0 },
311 { "ak8814", 0 },
312 { }
313};
314MODULE_DEVICE_TABLE(i2c, ak881x_id);
315
316static struct i2c_driver ak881x_i2c_driver = {
317 .driver = {
318 .name = "ak881x",
319 },
320 .probe = ak881x_probe,
321 .remove = ak881x_remove,
322 .id_table = ak881x_id,
323};
324
325module_i2c_driver(ak881x_i2c_driver);
326
327MODULE_DESCRIPTION("TV-output driver for ak8813/ak8814");
328MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
329MODULE_LICENSE("GPL v2");
330
