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[PATCH] I2C: i2c-algo-pca -- gracefully handle a busy bus
[linux-2.6/next.git] / drivers / usb / media / sn9c102_mi0343.c
blob86676abf3547819d29813ea9532838c9d5f43c40
1 /***************************************************************************
2 * Plug-in for MI-0343 image sensor connected to the SN9C10x PC Camera *
3 * Controllers *
4 * *
5 * Copyright (C) 2004-2005 by Luca Risolia <luca.risolia@studio.unibo.it> *
6 * *
7 * This program is free software; you can redistribute it and/or modify *
8 * it under the terms of the GNU General Public License as published by *
9 * the Free Software Foundation; either version 2 of the License, or *
10 * (at your option) any later version. *
11 * *
12 * This program is distributed in the hope that it will be useful, *
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
15 * GNU General Public License for more details. *
16 * *
17 * You should have received a copy of the GNU General Public License *
18 * along with this program; if not, write to the Free Software *
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
20 ***************************************************************************/
21
22 #include "sn9c102_sensor.h"
23
24
25 static struct sn9c102_sensor mi0343;
26 static u8 mi0343_i2c_data[5+1];
27
28
29 static int mi0343_init(struct sn9c102_device* cam)
30 {
31 int err = 0;
32
33 err += sn9c102_write_reg(cam, 0x00, 0x10);
34 err += sn9c102_write_reg(cam, 0x00, 0x11);
35 err += sn9c102_write_reg(cam, 0x0a, 0x14);
36 err += sn9c102_write_reg(cam, 0x40, 0x01);
37 err += sn9c102_write_reg(cam, 0x20, 0x17);
38 err += sn9c102_write_reg(cam, 0x07, 0x18);
39 err += sn9c102_write_reg(cam, 0xa0, 0x19);
40
41 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4, mi0343.i2c_slave_id,
42 0x0d, 0x00, 0x01, 0, 0);
43 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4, mi0343.i2c_slave_id,
44 0x0d, 0x00, 0x00, 0, 0);
45 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4, mi0343.i2c_slave_id,
46 0x03, 0x01, 0xe1, 0, 0);
47 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4, mi0343.i2c_slave_id,
48 0x04, 0x02, 0x81, 0, 0);
49 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4, mi0343.i2c_slave_id,
50 0x05, 0x00, 0x17, 0, 0);
51 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4, mi0343.i2c_slave_id,
52 0x06, 0x00, 0x11, 0, 0);
53 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4, mi0343.i2c_slave_id,
54 0x62, 0x04, 0x9a, 0, 0);
55
56 return err;
57 }
58
59
60 static int mi0343_get_ctrl(struct sn9c102_device* cam,
61 struct v4l2_control* ctrl)
62 {
63 switch (ctrl->id) {
64 case V4L2_CID_EXPOSURE:
65 if (sn9c102_i2c_try_raw_read(cam, &mi0343, mi0343.i2c_slave_id,
66 0x09, 2+1, mi0343_i2c_data) < 0)
67 return -EIO;
68 ctrl->value = mi0343_i2c_data[2];
69 return 0;
70 case V4L2_CID_GAIN:
71 if (sn9c102_i2c_try_raw_read(cam, &mi0343, mi0343.i2c_slave_id,
72 0x35, 2+1, mi0343_i2c_data) < 0)
73 return -EIO;
74 break;
75 case V4L2_CID_HFLIP:
76 if (sn9c102_i2c_try_raw_read(cam, &mi0343, mi0343.i2c_slave_id,
77 0x20, 2+1, mi0343_i2c_data) < 0)
78 return -EIO;
79 ctrl->value = mi0343_i2c_data[3] & 0x20 ? 1 : 0;
80 return 0;
81 case V4L2_CID_VFLIP:
82 if (sn9c102_i2c_try_raw_read(cam, &mi0343, mi0343.i2c_slave_id,
83 0x20, 2+1, mi0343_i2c_data) < 0)
84 return -EIO;
85 ctrl->value = mi0343_i2c_data[3] & 0x80 ? 1 : 0;
86 return 0;
87 case V4L2_CID_RED_BALANCE:
88 if (sn9c102_i2c_try_raw_read(cam, &mi0343, mi0343.i2c_slave_id,
89 0x2d, 2+1, mi0343_i2c_data) < 0)
90 return -EIO;
91 break;
92 case V4L2_CID_BLUE_BALANCE:
93 if (sn9c102_i2c_try_raw_read(cam, &mi0343, mi0343.i2c_slave_id,
94 0x2c, 2+1, mi0343_i2c_data) < 0)
95 return -EIO;
96 break;
97 case SN9C102_V4L2_CID_GREEN_BALANCE:
98 if (sn9c102_i2c_try_raw_read(cam, &mi0343, mi0343.i2c_slave_id,
99 0x2e, 2+1, mi0343_i2c_data) < 0)
100 return -EIO;
101 break;
102 default:
103 return -EINVAL;
104 }
105
106 switch (ctrl->id) {
107 case V4L2_CID_GAIN:
108 case V4L2_CID_RED_BALANCE:
109 case V4L2_CID_BLUE_BALANCE:
110 case SN9C102_V4L2_CID_GREEN_BALANCE:
111 ctrl->value = mi0343_i2c_data[3] | (mi0343_i2c_data[2] << 8);
112 if (ctrl->value >= 0x10 && ctrl->value <= 0x3f)
113 ctrl->value -= 0x10;
114 else if (ctrl->value >= 0x60 && ctrl->value <= 0x7f)
115 ctrl->value -= 0x60;
116 else if (ctrl->value >= 0xe0 && ctrl->value <= 0xff)
117 ctrl->value -= 0xe0;
118 }
119
120 return 0;
121 }
122
123
124 static int mi0343_set_ctrl(struct sn9c102_device* cam,
125 const struct v4l2_control* ctrl)
126 {
127 u16 reg = 0;
128 int err = 0;
129
130 switch (ctrl->id) {
131 case V4L2_CID_GAIN:
132 case V4L2_CID_RED_BALANCE:
133 case V4L2_CID_BLUE_BALANCE:
134 case SN9C102_V4L2_CID_GREEN_BALANCE:
135 if (ctrl->value <= (0x3f-0x10))
136 reg = 0x10 + ctrl->value;
137 else if (ctrl->value <= ((0x3f-0x10) + (0x7f-0x60)))
138 reg = 0x60 + (ctrl->value - (0x3f-0x10));
139 else
140 reg = 0xe0 + (ctrl->value - (0x3f-0x10) - (0x7f-0x60));
141 break;
142 }
143
144 switch (ctrl->id) {
145 case V4L2_CID_EXPOSURE:
146 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4,
147 mi0343.i2c_slave_id,
148 0x09, ctrl->value, 0x00,
149 0, 0);
150 break;
151 case V4L2_CID_GAIN:
152 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4,
153 mi0343.i2c_slave_id,
154 0x35, reg >> 8, reg & 0xff,
155 0, 0);
156 break;
157 case V4L2_CID_HFLIP:
158 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4,
159 mi0343.i2c_slave_id,
160 0x20, ctrl->value ? 0x40:0x00,
161 ctrl->value ? 0x20:0x00,
162 0, 0);
163 break;
164 case V4L2_CID_VFLIP:
165 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4,
166 mi0343.i2c_slave_id,
167 0x20, ctrl->value ? 0x80:0x00,
168 ctrl->value ? 0x80:0x00,
169 0, 0);
170 break;
171 case V4L2_CID_RED_BALANCE:
172 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4,
173 mi0343.i2c_slave_id,
174 0x2d, reg >> 8, reg & 0xff,
175 0, 0);
176 break;
177 case V4L2_CID_BLUE_BALANCE:
178 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4,
179 mi0343.i2c_slave_id,
180 0x2c, reg >> 8, reg & 0xff,
181 0, 0);
182 break;
183 case SN9C102_V4L2_CID_GREEN_BALANCE:
184 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4,
185 mi0343.i2c_slave_id,
186 0x2b, reg >> 8, reg & 0xff,
187 0, 0);
188 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4,
189 mi0343.i2c_slave_id,
190 0x2e, reg >> 8, reg & 0xff,
191 0, 0);
192 break;
193 default:
194 return -EINVAL;
195 }
196
197 return err ? -EIO : 0;
198 }
199
200
201 static int mi0343_set_crop(struct sn9c102_device* cam,
202 const struct v4l2_rect* rect)
203 {
204 struct sn9c102_sensor* s = &mi0343;
205 int err = 0;
206 u8 h_start = (u8)(rect->left - s->cropcap.bounds.left) + 0,
207 v_start = (u8)(rect->top - s->cropcap.bounds.top) + 2;
208
209 err += sn9c102_write_reg(cam, h_start, 0x12);
210 err += sn9c102_write_reg(cam, v_start, 0x13);
211
212 return err;
213 }
214
215
216 static int mi0343_set_pix_format(struct sn9c102_device* cam,
217 const struct v4l2_pix_format* pix)
218 {
219 int err = 0;
220
221 if (pix->pixelformat == V4L2_PIX_FMT_SN9C10X) {
222 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4,
223 mi0343.i2c_slave_id,
224 0x0a, 0x00, 0x03, 0, 0);
225 err += sn9c102_write_reg(cam, 0x20, 0x19);
226 } else {
227 err += sn9c102_i2c_try_raw_write(cam, &mi0343, 4,
228 mi0343.i2c_slave_id,
229 0x0a, 0x00, 0x05, 0, 0);
230 err += sn9c102_write_reg(cam, 0xa0, 0x19);
231 }
232
233 return err;
234 }
235
236
237 static struct sn9c102_sensor mi0343 = {
238 .name = "MI-0343",
239 .maintainer = "Luca Risolia <luca.risolia@studio.unibo.it>",
240 .frequency = SN9C102_I2C_100KHZ,
241 .interface = SN9C102_I2C_2WIRES,
242 .i2c_slave_id = 0x5d,
243 .init = &mi0343_init,
244 .qctrl = {
245 {
246 .id = V4L2_CID_EXPOSURE,
247 .type = V4L2_CTRL_TYPE_INTEGER,
248 .name = "exposure",
249 .minimum = 0x00,
250 .maximum = 0x0f,
251 .step = 0x01,
252 .default_value = 0x06,
253 .flags = 0,
254 },
255 {
256 .id = V4L2_CID_GAIN,
257 .type = V4L2_CTRL_TYPE_INTEGER,
258 .name = "global gain",
259 .minimum = 0x00,
260 .maximum = (0x3f-0x10)+(0x7f-0x60)+(0xff-0xe0),/*0x6d*/
261 .step = 0x01,
262 .default_value = 0x00,
263 .flags = 0,
264 },
265 {
266 .id = V4L2_CID_HFLIP,
267 .type = V4L2_CTRL_TYPE_BOOLEAN,
268 .name = "horizontal mirror",
269 .minimum = 0,
270 .maximum = 1,
271 .step = 1,
272 .default_value = 0,
273 .flags = 0,
274 },
275 {
276 .id = V4L2_CID_VFLIP,
277 .type = V4L2_CTRL_TYPE_BOOLEAN,
278 .name = "vertical mirror",
279 .minimum = 0,
280 .maximum = 1,
281 .step = 1,
282 .default_value = 0,
283 .flags = 0,
284 },
285 {
286 .id = V4L2_CID_RED_BALANCE,
287 .type = V4L2_CTRL_TYPE_INTEGER,
288 .name = "red balance",
289 .minimum = 0x00,
290 .maximum = (0x3f-0x10)+(0x7f-0x60)+(0xff-0xe0),
291 .step = 0x01,
292 .default_value = 0x00,
293 .flags = 0,
294 },
295 {
296 .id = V4L2_CID_BLUE_BALANCE,
297 .type = V4L2_CTRL_TYPE_INTEGER,
298 .name = "blue balance",
299 .minimum = 0x00,
300 .maximum = (0x3f-0x10)+(0x7f-0x60)+(0xff-0xe0),
301 .step = 0x01,
302 .default_value = 0x00,
303 .flags = 0,
304 },
305 {
306 .id = SN9C102_V4L2_CID_GREEN_BALANCE,
307 .type = V4L2_CTRL_TYPE_INTEGER,
308 .name = "green balance",
309 .minimum = 0x00,
310 .maximum = ((0x3f-0x10)+(0x7f-0x60)+(0xff-0xe0)),
311 .step = 0x01,
312 .default_value = 0x00,
313 .flags = 0,
314 },
315 },
316 .get_ctrl = &mi0343_get_ctrl,
317 .set_ctrl = &mi0343_set_ctrl,
318 .cropcap = {
319 .bounds = {
320 .left = 0,
321 .top = 0,
322 .width = 640,
323 .height = 480,
324 },
325 .defrect = {
326 .left = 0,
327 .top = 0,
328 .width = 640,
329 .height = 480,
330 },
331 },
332 .set_crop = &mi0343_set_crop,
333 .pix_format = {
334 .width = 640,
335 .height = 480,
336 .pixelformat = V4L2_PIX_FMT_SBGGR8,
337 .priv = 8,
338 },
339 .set_pix_format = &mi0343_set_pix_format
340 };
341
342
343 int sn9c102_probe_mi0343(struct sn9c102_device* cam)
344 {
345 int err = 0;
346
347 err += sn9c102_write_reg(cam, 0x01, 0x01);
348 err += sn9c102_write_reg(cam, 0x00, 0x01);
349 err += sn9c102_write_reg(cam, 0x28, 0x17);
350 if (err)
351 return -EIO;
352
353 if (sn9c102_i2c_try_raw_read(cam, &mi0343, mi0343.i2c_slave_id, 0x00,
354 2, mi0343_i2c_data) < 0)
355 return -EIO;
356
357 if (mi0343_i2c_data[4] != 0x32 && mi0343_i2c_data[3] != 0xe3)
358 return -ENODEV;
359
360 sn9c102_attach_sensor(cam, &mi0343);
361
362 return 0;
363 }
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