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V4L/DVB (12531): soc-camera: Use I2C device for dev_{dbg,info,...} output in all...
[linux-2.6/mini2440.git] / drivers / media / video / mt9v022.c
blobab1965425289083ff879d7916981e0e5f6a5677c
1 /*
2 * Driver for MT9V022 CMOS Image Sensor from Micron
3 *
4 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.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/videodev2.h>
12 #include <linux/slab.h>
13 #include <linux/i2c.h>
14 #include <linux/delay.h>
15 #include <linux/log2.h>
16
17 #include <media/v4l2-subdev.h>
18 #include <media/v4l2-chip-ident.h>
19 #include <media/soc_camera.h>
20
21 /* mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
22 * The platform has to define ctruct i2c_board_info objects and link to them
23 * from struct soc_camera_link */
24
25 static char *sensor_type;
26 module_param(sensor_type, charp, S_IRUGO);
27 MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"");
28
29 /* mt9v022 selected register addresses */
30 #define MT9V022_CHIP_VERSION 0x00
31 #define MT9V022_COLUMN_START 0x01
32 #define MT9V022_ROW_START 0x02
33 #define MT9V022_WINDOW_HEIGHT 0x03
34 #define MT9V022_WINDOW_WIDTH 0x04
35 #define MT9V022_HORIZONTAL_BLANKING 0x05
36 #define MT9V022_VERTICAL_BLANKING 0x06
37 #define MT9V022_CHIP_CONTROL 0x07
38 #define MT9V022_SHUTTER_WIDTH1 0x08
39 #define MT9V022_SHUTTER_WIDTH2 0x09
40 #define MT9V022_SHUTTER_WIDTH_CTRL 0x0a
41 #define MT9V022_TOTAL_SHUTTER_WIDTH 0x0b
42 #define MT9V022_RESET 0x0c
43 #define MT9V022_READ_MODE 0x0d
44 #define MT9V022_MONITOR_MODE 0x0e
45 #define MT9V022_PIXEL_OPERATION_MODE 0x0f
46 #define MT9V022_LED_OUT_CONTROL 0x1b
47 #define MT9V022_ADC_MODE_CONTROL 0x1c
48 #define MT9V022_ANALOG_GAIN 0x34
49 #define MT9V022_BLACK_LEVEL_CALIB_CTRL 0x47
50 #define MT9V022_PIXCLK_FV_LV 0x74
51 #define MT9V022_DIGITAL_TEST_PATTERN 0x7f
52 #define MT9V022_AEC_AGC_ENABLE 0xAF
53 #define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD
54
55 /* Progressive scan, master, defaults */
56 #define MT9V022_CHIP_CONTROL_DEFAULT 0x188
57
58 static const struct soc_camera_data_format mt9v022_colour_formats[] = {
59 /* Order important: first natively supported,
60 * second supported with a GPIO extender */
61 {
62 .name = "Bayer (sRGB) 10 bit",
63 .depth = 10,
64 .fourcc = V4L2_PIX_FMT_SBGGR16,
65 .colorspace = V4L2_COLORSPACE_SRGB,
66 }, {
67 .name = "Bayer (sRGB) 8 bit",
68 .depth = 8,
69 .fourcc = V4L2_PIX_FMT_SBGGR8,
70 .colorspace = V4L2_COLORSPACE_SRGB,
71 }
72 };
73
74 static const struct soc_camera_data_format mt9v022_monochrome_formats[] = {
75 /* Order important - see above */
76 {
77 .name = "Monochrome 10 bit",
78 .depth = 10,
79 .fourcc = V4L2_PIX_FMT_Y16,
80 }, {
81 .name = "Monochrome 8 bit",
82 .depth = 8,
83 .fourcc = V4L2_PIX_FMT_GREY,
84 },
85 };
86
87 struct mt9v022 {
88 struct v4l2_subdev subdev;
89 int model; /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */
90 u16 chip_control;
91 };
92
93 static struct mt9v022 *to_mt9v022(const struct i2c_client *client)
94 {
95 return container_of(i2c_get_clientdata(client), struct mt9v022, subdev);
96 }
97
98 static int reg_read(struct i2c_client *client, const u8 reg)
99 {
100 s32 data = i2c_smbus_read_word_data(client, reg);
101 return data < 0 ? data : swab16(data);
102 }
103
104 static int reg_write(struct i2c_client *client, const u8 reg,
105 const u16 data)
106 {
107 return i2c_smbus_write_word_data(client, reg, swab16(data));
108 }
109
110 static int reg_set(struct i2c_client *client, const u8 reg,
111 const u16 data)
112 {
113 int ret;
114
115 ret = reg_read(client, reg);
116 if (ret < 0)
117 return ret;
118 return reg_write(client, reg, ret | data);
119 }
120
121 static int reg_clear(struct i2c_client *client, const u8 reg,
122 const u16 data)
123 {
124 int ret;
125
126 ret = reg_read(client, reg);
127 if (ret < 0)
128 return ret;
129 return reg_write(client, reg, ret & ~data);
130 }
131
132 static int mt9v022_init(struct soc_camera_device *icd)
133 {
134 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
135 struct mt9v022 *mt9v022 = to_mt9v022(client);
136 int ret;
137
138 /* Almost the default mode: master, parallel, simultaneous, and an
139 * undocumented bit 0x200, which is present in table 7, but not in 8,
140 * plus snapshot mode to disable scan for now */
141 mt9v022->chip_control |= 0x10;
142 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
143 if (!ret)
144 ret = reg_write(client, MT9V022_READ_MODE, 0x300);
145
146 /* All defaults */
147 if (!ret)
148 /* AEC, AGC on */
149 ret = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x3);
150 if (!ret)
151 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480);
152 if (!ret)
153 /* default - auto */
154 ret = reg_clear(client, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
155 if (!ret)
156 ret = reg_write(client, MT9V022_DIGITAL_TEST_PATTERN, 0);
157
158 return ret;
159 }
160
161 static int mt9v022_s_stream(struct v4l2_subdev *sd, int enable)
162 {
163 struct i2c_client *client = sd->priv;
164 struct mt9v022 *mt9v022 = to_mt9v022(client);
165
166 if (enable)
167 /* Switch to master "normal" mode */
168 mt9v022->chip_control &= ~0x10;
169 else
170 /* Switch to snapshot mode */
171 mt9v022->chip_control |= 0x10;
172
173 if (reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control) < 0)
174 return -EIO;
175 return 0;
176 }
177
178 static int mt9v022_set_bus_param(struct soc_camera_device *icd,
179 unsigned long flags)
180 {
181 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
182 struct mt9v022 *mt9v022 = to_mt9v022(client);
183 struct soc_camera_link *icl = to_soc_camera_link(icd);
184 unsigned int width_flag = flags & SOCAM_DATAWIDTH_MASK;
185 int ret;
186 u16 pixclk = 0;
187
188 /* Only one width bit may be set */
189 if (!is_power_of_2(width_flag))
190 return -EINVAL;
191
192 if (icl->set_bus_param) {
193 ret = icl->set_bus_param(icl, width_flag);
194 if (ret)
195 return ret;
196 } else {
197 /*
198 * Without board specific bus width settings we only support the
199 * sensors native bus width
200 */
201 if (width_flag != SOCAM_DATAWIDTH_10)
202 return -EINVAL;
203 }
204
205 flags = soc_camera_apply_sensor_flags(icl, flags);
206
207 if (flags & SOCAM_PCLK_SAMPLE_RISING)
208 pixclk |= 0x10;
209
210 if (!(flags & SOCAM_HSYNC_ACTIVE_HIGH))
211 pixclk |= 0x1;
212
213 if (!(flags & SOCAM_VSYNC_ACTIVE_HIGH))
214 pixclk |= 0x2;
215
216 ret = reg_write(client, MT9V022_PIXCLK_FV_LV, pixclk);
217 if (ret < 0)
218 return ret;
219
220 if (!(flags & SOCAM_MASTER))
221 mt9v022->chip_control &= ~0x8;
222
223 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
224 if (ret < 0)
225 return ret;
226
227 dev_dbg(&client->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
228 pixclk, mt9v022->chip_control);
229
230 return 0;
231 }
232
233 static unsigned long mt9v022_query_bus_param(struct soc_camera_device *icd)
234 {
235 struct soc_camera_link *icl = to_soc_camera_link(icd);
236 unsigned int width_flag;
237
238 if (icl->query_bus_param)
239 width_flag = icl->query_bus_param(icl) &
240 SOCAM_DATAWIDTH_MASK;
241 else
242 width_flag = SOCAM_DATAWIDTH_10;
243
244 return SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
245 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW |
246 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW |
247 SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER | SOCAM_SLAVE |
248 width_flag;
249 }
250
251 static int mt9v022_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
252 {
253 struct v4l2_rect *rect = &a->c;
254 struct i2c_client *client = sd->priv;
255 struct soc_camera_device *icd = client->dev.platform_data;
256 int ret;
257
258 /* Like in example app. Contradicts the datasheet though */
259 ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
260 if (ret >= 0) {
261 if (ret & 1) /* Autoexposure */
262 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
263 rect->height + icd->y_skip_top + 43);
264 else
265 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
266 rect->height + icd->y_skip_top + 43);
267 }
268 /* Setup frame format: defaults apart from width and height */
269 if (!ret)
270 ret = reg_write(client, MT9V022_COLUMN_START, rect->left);
271 if (!ret)
272 ret = reg_write(client, MT9V022_ROW_START, rect->top);
273 if (!ret)
274 /* Default 94, Phytec driver says:
275 * "width + horizontal blank >= 660" */
276 ret = reg_write(client, MT9V022_HORIZONTAL_BLANKING,
277 rect->width > 660 - 43 ? 43 :
278 660 - rect->width);
279 if (!ret)
280 ret = reg_write(client, MT9V022_VERTICAL_BLANKING, 45);
281 if (!ret)
282 ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect->width);
283 if (!ret)
284 ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
285 rect->height + icd->y_skip_top);
286
287 if (ret < 0)
288 return ret;
289
290 dev_dbg(&client->dev, "Frame %ux%u pixel\n", rect->width, rect->height);
291
292 return 0;
293 }
294
295 static int mt9v022_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
296 {
297 struct i2c_client *client = sd->priv;
298 struct mt9v022 *mt9v022 = to_mt9v022(client);
299 struct soc_camera_device *icd = client->dev.platform_data;
300 struct v4l2_pix_format *pix = &f->fmt.pix;
301 struct v4l2_crop a = {
302 .c = {
303 .left = icd->rect_current.left,
304 .top = icd->rect_current.top,
305 .width = pix->width,
306 .height = pix->height,
307 },
308 };
309
310 /* The caller provides a supported format, as verified per call to
311 * icd->try_fmt(), datawidth is from our supported format list */
312 switch (pix->pixelformat) {
313 case V4L2_PIX_FMT_GREY:
314 case V4L2_PIX_FMT_Y16:
315 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM)
316 return -EINVAL;
317 break;
318 case V4L2_PIX_FMT_SBGGR8:
319 case V4L2_PIX_FMT_SBGGR16:
320 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC)
321 return -EINVAL;
322 break;
323 case 0:
324 /* No format change, only geometry */
325 break;
326 default:
327 return -EINVAL;
328 }
329
330 /* No support for scaling on this camera, just crop. */
331 return mt9v022_s_crop(sd, &a);
332 }
333
334 static int mt9v022_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
335 {
336 struct i2c_client *client = sd->priv;
337 struct soc_camera_device *icd = client->dev.platform_data;
338 struct v4l2_pix_format *pix = &f->fmt.pix;
339
340 v4l_bound_align_image(&pix->width, 48, 752, 2 /* ? */,
341 &pix->height, 32 + icd->y_skip_top,
342 480 + icd->y_skip_top, 0, 0);
343
344 return 0;
345 }
346
347 static int mt9v022_g_chip_ident(struct v4l2_subdev *sd,
348 struct v4l2_dbg_chip_ident *id)
349 {
350 struct i2c_client *client = sd->priv;
351 struct mt9v022 *mt9v022 = to_mt9v022(client);
352
353 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
354 return -EINVAL;
355
356 if (id->match.addr != client->addr)
357 return -ENODEV;
358
359 id->ident = mt9v022->model;
360 id->revision = 0;
361
362 return 0;
363 }
364
365 #ifdef CONFIG_VIDEO_ADV_DEBUG
366 static int mt9v022_g_register(struct v4l2_subdev *sd,
367 struct v4l2_dbg_register *reg)
368 {
369 struct i2c_client *client = sd->priv;
370
371 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
372 return -EINVAL;
373
374 if (reg->match.addr != client->addr)
375 return -ENODEV;
376
377 reg->size = 2;
378 reg->val = reg_read(client, reg->reg);
379
380 if (reg->val > 0xffff)
381 return -EIO;
382
383 return 0;
384 }
385
386 static int mt9v022_s_register(struct v4l2_subdev *sd,
387 struct v4l2_dbg_register *reg)
388 {
389 struct i2c_client *client = sd->priv;
390
391 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
392 return -EINVAL;
393
394 if (reg->match.addr != client->addr)
395 return -ENODEV;
396
397 if (reg_write(client, reg->reg, reg->val) < 0)
398 return -EIO;
399
400 return 0;
401 }
402 #endif
403
404 static const struct v4l2_queryctrl mt9v022_controls[] = {
405 {
406 .id = V4L2_CID_VFLIP,
407 .type = V4L2_CTRL_TYPE_BOOLEAN,
408 .name = "Flip Vertically",
409 .minimum = 0,
410 .maximum = 1,
411 .step = 1,
412 .default_value = 0,
413 }, {
414 .id = V4L2_CID_HFLIP,
415 .type = V4L2_CTRL_TYPE_BOOLEAN,
416 .name = "Flip Horizontally",
417 .minimum = 0,
418 .maximum = 1,
419 .step = 1,
420 .default_value = 0,
421 }, {
422 .id = V4L2_CID_GAIN,
423 .type = V4L2_CTRL_TYPE_INTEGER,
424 .name = "Analog Gain",
425 .minimum = 64,
426 .maximum = 127,
427 .step = 1,
428 .default_value = 64,
429 .flags = V4L2_CTRL_FLAG_SLIDER,
430 }, {
431 .id = V4L2_CID_EXPOSURE,
432 .type = V4L2_CTRL_TYPE_INTEGER,
433 .name = "Exposure",
434 .minimum = 1,
435 .maximum = 255,
436 .step = 1,
437 .default_value = 255,
438 .flags = V4L2_CTRL_FLAG_SLIDER,
439 }, {
440 .id = V4L2_CID_AUTOGAIN,
441 .type = V4L2_CTRL_TYPE_BOOLEAN,
442 .name = "Automatic Gain",
443 .minimum = 0,
444 .maximum = 1,
445 .step = 1,
446 .default_value = 1,
447 }, {
448 .id = V4L2_CID_EXPOSURE_AUTO,
449 .type = V4L2_CTRL_TYPE_BOOLEAN,
450 .name = "Automatic Exposure",
451 .minimum = 0,
452 .maximum = 1,
453 .step = 1,
454 .default_value = 1,
455 }
456 };
457
458 static struct soc_camera_ops mt9v022_ops = {
459 .init = mt9v022_init,
460 .set_bus_param = mt9v022_set_bus_param,
461 .query_bus_param = mt9v022_query_bus_param,
462 .controls = mt9v022_controls,
463 .num_controls = ARRAY_SIZE(mt9v022_controls),
464 };
465
466 static int mt9v022_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
467 {
468 struct i2c_client *client = sd->priv;
469 int data;
470
471 switch (ctrl->id) {
472 case V4L2_CID_VFLIP:
473 data = reg_read(client, MT9V022_READ_MODE);
474 if (data < 0)
475 return -EIO;
476 ctrl->value = !!(data & 0x10);
477 break;
478 case V4L2_CID_HFLIP:
479 data = reg_read(client, MT9V022_READ_MODE);
480 if (data < 0)
481 return -EIO;
482 ctrl->value = !!(data & 0x20);
483 break;
484 case V4L2_CID_EXPOSURE_AUTO:
485 data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
486 if (data < 0)
487 return -EIO;
488 ctrl->value = !!(data & 0x1);
489 break;
490 case V4L2_CID_AUTOGAIN:
491 data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
492 if (data < 0)
493 return -EIO;
494 ctrl->value = !!(data & 0x2);
495 break;
496 }
497 return 0;
498 }
499
500 static int mt9v022_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
501 {
502 int data;
503 struct i2c_client *client = sd->priv;
504 struct soc_camera_device *icd = client->dev.platform_data;
505 const struct v4l2_queryctrl *qctrl;
506
507 qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
508 if (!qctrl)
509 return -EINVAL;
510
511 switch (ctrl->id) {
512 case V4L2_CID_VFLIP:
513 if (ctrl->value)
514 data = reg_set(client, MT9V022_READ_MODE, 0x10);
515 else
516 data = reg_clear(client, MT9V022_READ_MODE, 0x10);
517 if (data < 0)
518 return -EIO;
519 break;
520 case V4L2_CID_HFLIP:
521 if (ctrl->value)
522 data = reg_set(client, MT9V022_READ_MODE, 0x20);
523 else
524 data = reg_clear(client, MT9V022_READ_MODE, 0x20);
525 if (data < 0)
526 return -EIO;
527 break;
528 case V4L2_CID_GAIN:
529 /* mt9v022 has minimum == default */
530 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
531 return -EINVAL;
532 else {
533 unsigned long range = qctrl->maximum - qctrl->minimum;
534 /* Datasheet says 16 to 64. autogain only works properly
535 * after setting gain to maximum 14. Larger values
536 * produce "white fly" noise effect. On the whole,
537 * manually setting analog gain does no good. */
538 unsigned long gain = ((ctrl->value - qctrl->minimum) *
539 10 + range / 2) / range + 4;
540 if (gain >= 32)
541 gain &= ~1;
542 /* The user wants to set gain manually, hope, she
543 * knows, what she's doing... Switch AGC off. */
544
545 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
546 return -EIO;
547
548 dev_info(&client->dev, "Setting gain from %d to %lu\n",
549 reg_read(client, MT9V022_ANALOG_GAIN), gain);
550 if (reg_write(client, MT9V022_ANALOG_GAIN, gain) < 0)
551 return -EIO;
552 icd->gain = ctrl->value;
553 }
554 break;
555 case V4L2_CID_EXPOSURE:
556 /* mt9v022 has maximum == default */
557 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
558 return -EINVAL;
559 else {
560 unsigned long range = qctrl->maximum - qctrl->minimum;
561 unsigned long shutter = ((ctrl->value - qctrl->minimum) *
562 479 + range / 2) / range + 1;
563 /* The user wants to set shutter width manually, hope,
564 * she knows, what she's doing... Switch AEC off. */
565
566 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1) < 0)
567 return -EIO;
568
569 dev_dbg(&client->dev, "Shutter width from %d to %lu\n",
570 reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
571 shutter);
572 if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
573 shutter) < 0)
574 return -EIO;
575 icd->exposure = ctrl->value;
576 }
577 break;
578 case V4L2_CID_AUTOGAIN:
579 if (ctrl->value)
580 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2);
581 else
582 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2);
583 if (data < 0)
584 return -EIO;
585 break;
586 case V4L2_CID_EXPOSURE_AUTO:
587 if (ctrl->value)
588 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
589 else
590 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
591 if (data < 0)
592 return -EIO;
593 break;
594 }
595 return 0;
596 }
597
598 /* Interface active, can use i2c. If it fails, it can indeed mean, that
599 * this wasn't our capture interface, so, we wait for the right one */
600 static int mt9v022_video_probe(struct soc_camera_device *icd,
601 struct i2c_client *client)
602 {
603 struct mt9v022 *mt9v022 = to_mt9v022(client);
604 struct soc_camera_link *icl = to_soc_camera_link(icd);
605 s32 data;
606 int ret;
607 unsigned long flags;
608
609 if (!icd->dev.parent ||
610 to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
611 return -ENODEV;
612
613 /* Read out the chip version register */
614 data = reg_read(client, MT9V022_CHIP_VERSION);
615
616 /* must be 0x1311 or 0x1313 */
617 if (data != 0x1311 && data != 0x1313) {
618 ret = -ENODEV;
619 dev_info(&client->dev, "No MT9V022 found, ID register 0x%x\n",
620 data);
621 goto ei2c;
622 }
623
624 /* Soft reset */
625 ret = reg_write(client, MT9V022_RESET, 1);
626 if (ret < 0)
627 goto ei2c;
628 /* 15 clock cycles */
629 udelay(200);
630 if (reg_read(client, MT9V022_RESET)) {
631 dev_err(&client->dev, "Resetting MT9V022 failed!\n");
632 if (ret > 0)
633 ret = -EIO;
634 goto ei2c;
635 }
636
637 /* Set monochrome or colour sensor type */
638 if (sensor_type && (!strcmp("colour", sensor_type) ||
639 !strcmp("color", sensor_type))) {
640 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
641 mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
642 icd->formats = mt9v022_colour_formats;
643 } else {
644 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
645 mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
646 icd->formats = mt9v022_monochrome_formats;
647 }
648
649 if (ret < 0)
650 goto ei2c;
651
652 icd->num_formats = 0;
653
654 /*
655 * This is a 10bit sensor, so by default we only allow 10bit.
656 * The platform may support different bus widths due to
657 * different routing of the data lines.
658 */
659 if (icl->query_bus_param)
660 flags = icl->query_bus_param(icl);
661 else
662 flags = SOCAM_DATAWIDTH_10;
663
664 if (flags & SOCAM_DATAWIDTH_10)
665 icd->num_formats++;
666 else
667 icd->formats++;
668
669 if (flags & SOCAM_DATAWIDTH_8)
670 icd->num_formats++;
671
672 dev_info(&client->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
673 data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
674 "monochrome" : "colour");
675
676 ei2c:
677 return ret;
678 }
679
680 static void mt9v022_video_remove(struct soc_camera_device *icd)
681 {
682 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
683 struct soc_camera_link *icl = to_soc_camera_link(icd);
684
685 dev_dbg(&client->dev, "Video %x removed: %p, %p\n", client->addr,
686 icd->dev.parent, icd->vdev);
687 if (icl->free_bus)
688 icl->free_bus(icl);
689 }
690
691 static struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
692 .g_ctrl = mt9v022_g_ctrl,
693 .s_ctrl = mt9v022_s_ctrl,
694 .g_chip_ident = mt9v022_g_chip_ident,
695 #ifdef CONFIG_VIDEO_ADV_DEBUG
696 .g_register = mt9v022_g_register,
697 .s_register = mt9v022_s_register,
698 #endif
699 };
700
701 static struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
702 .s_stream = mt9v022_s_stream,
703 .s_fmt = mt9v022_s_fmt,
704 .try_fmt = mt9v022_try_fmt,
705 .s_crop = mt9v022_s_crop,
706 };
707
708 static struct v4l2_subdev_ops mt9v022_subdev_ops = {
709 .core = &mt9v022_subdev_core_ops,
710 .video = &mt9v022_subdev_video_ops,
711 };
712
713 static int mt9v022_probe(struct i2c_client *client,
714 const struct i2c_device_id *did)
715 {
716 struct mt9v022 *mt9v022;
717 struct soc_camera_device *icd = client->dev.platform_data;
718 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
719 struct soc_camera_link *icl;
720 int ret;
721
722 if (!icd) {
723 dev_err(&client->dev, "MT9V022: missing soc-camera data!\n");
724 return -EINVAL;
725 }
726
727 icl = to_soc_camera_link(icd);
728 if (!icl) {
729 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
730 return -EINVAL;
731 }
732
733 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
734 dev_warn(&adapter->dev,
735 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
736 return -EIO;
737 }
738
739 mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL);
740 if (!mt9v022)
741 return -ENOMEM;
742
743 v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
744
745 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
746
747 icd->ops = &mt9v022_ops;
748 icd->rect_max.left = 1;
749 icd->rect_max.top = 4;
750 icd->rect_max.width = 752;
751 icd->rect_max.height = 480;
752 icd->rect_current.left = 1;
753 icd->rect_current.top = 4;
754 icd->width_min = 48;
755 icd->height_min = 32;
756 icd->y_skip_top = 1;
757
758 ret = mt9v022_video_probe(icd, client);
759 if (ret) {
760 icd->ops = NULL;
761 i2c_set_clientdata(client, NULL);
762 kfree(mt9v022);
763 }
764
765 return ret;
766 }
767
768 static int mt9v022_remove(struct i2c_client *client)
769 {
770 struct mt9v022 *mt9v022 = to_mt9v022(client);
771 struct soc_camera_device *icd = client->dev.platform_data;
772
773 icd->ops = NULL;
774 mt9v022_video_remove(icd);
775 i2c_set_clientdata(client, NULL);
776 client->driver = NULL;
777 kfree(mt9v022);
778
779 return 0;
780 }
781 static const struct i2c_device_id mt9v022_id[] = {
782 { "mt9v022", 0 },
783 { }
784 };
785 MODULE_DEVICE_TABLE(i2c, mt9v022_id);
786
787 static struct i2c_driver mt9v022_i2c_driver = {
788 .driver = {
789 .name = "mt9v022",
790 },
791 .probe = mt9v022_probe,
792 .remove = mt9v022_remove,
793 .id_table = mt9v022_id,
794 };
795
796 static int __init mt9v022_mod_init(void)
797 {
798 return i2c_add_driver(&mt9v022_i2c_driver);
799 }
800
801 static void __exit mt9v022_mod_exit(void)
802 {
803 i2c_del_driver(&mt9v022_i2c_driver);
804 }
805
806 module_init(mt9v022_mod_init);
807 module_exit(mt9v022_mod_exit);
808
809 MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
810 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
811 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards