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V4L/DVB (12510): soc-camera: (partially) convert to v4l2-(sub)dev API
[linux-2.6/mini2440.git] / drivers / media / video / mt9v022.c
blob3cb9f0f1e256296622ba91b37193beb4561f3401
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(&icd->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_set_crop(struct soc_camera_device *icd,
252 struct v4l2_rect *rect)
253 {
254 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
255 int ret;
256
257 /* Like in example app. Contradicts the datasheet though */
258 ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
259 if (ret >= 0) {
260 if (ret & 1) /* Autoexposure */
261 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
262 rect->height + icd->y_skip_top + 43);
263 else
264 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
265 rect->height + icd->y_skip_top + 43);
266 }
267 /* Setup frame format: defaults apart from width and height */
268 if (!ret)
269 ret = reg_write(client, MT9V022_COLUMN_START, rect->left);
270 if (!ret)
271 ret = reg_write(client, MT9V022_ROW_START, rect->top);
272 if (!ret)
273 /* Default 94, Phytec driver says:
274 * "width + horizontal blank >= 660" */
275 ret = reg_write(client, MT9V022_HORIZONTAL_BLANKING,
276 rect->width > 660 - 43 ? 43 :
277 660 - rect->width);
278 if (!ret)
279 ret = reg_write(client, MT9V022_VERTICAL_BLANKING, 45);
280 if (!ret)
281 ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect->width);
282 if (!ret)
283 ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
284 rect->height + icd->y_skip_top);
285
286 if (ret < 0)
287 return ret;
288
289 dev_dbg(&icd->dev, "Frame %ux%u pixel\n", rect->width, rect->height);
290
291 return 0;
292 }
293
294 static int mt9v022_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
295 {
296 struct i2c_client *client = sd->priv;
297 struct mt9v022 *mt9v022 = to_mt9v022(client);
298 struct soc_camera_device *icd = client->dev.platform_data;
299 struct v4l2_pix_format *pix = &f->fmt.pix;
300 struct v4l2_rect rect = {
301 .left = icd->x_current,
302 .top = icd->y_current,
303 .width = pix->width,
304 .height = pix->height,
305 };
306
307 /* The caller provides a supported format, as verified per call to
308 * icd->try_fmt(), datawidth is from our supported format list */
309 switch (pix->pixelformat) {
310 case V4L2_PIX_FMT_GREY:
311 case V4L2_PIX_FMT_Y16:
312 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM)
313 return -EINVAL;
314 break;
315 case V4L2_PIX_FMT_SBGGR8:
316 case V4L2_PIX_FMT_SBGGR16:
317 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC)
318 return -EINVAL;
319 break;
320 case 0:
321 /* No format change, only geometry */
322 break;
323 default:
324 return -EINVAL;
325 }
326
327 /* No support for scaling on this camera, just crop. */
328 return mt9v022_set_crop(icd, &rect);
329 }
330
331 static int mt9v022_try_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
332 {
333 struct i2c_client *client = sd->priv;
334 struct soc_camera_device *icd = client->dev.platform_data;
335 struct v4l2_pix_format *pix = &f->fmt.pix;
336
337 v4l_bound_align_image(&pix->width, 48, 752, 2 /* ? */,
338 &pix->height, 32 + icd->y_skip_top,
339 480 + icd->y_skip_top, 0, 0);
340
341 return 0;
342 }
343
344 static int mt9v022_g_chip_ident(struct v4l2_subdev *sd,
345 struct v4l2_dbg_chip_ident *id)
346 {
347 struct i2c_client *client = sd->priv;
348 struct mt9v022 *mt9v022 = to_mt9v022(client);
349
350 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
351 return -EINVAL;
352
353 if (id->match.addr != client->addr)
354 return -ENODEV;
355
356 id->ident = mt9v022->model;
357 id->revision = 0;
358
359 return 0;
360 }
361
362 #ifdef CONFIG_VIDEO_ADV_DEBUG
363 static int mt9v022_g_register(struct v4l2_subdev *sd,
364 struct v4l2_dbg_register *reg)
365 {
366 struct i2c_client *client = sd->priv;
367
368 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
369 return -EINVAL;
370
371 if (reg->match.addr != client->addr)
372 return -ENODEV;
373
374 reg->size = 2;
375 reg->val = reg_read(client, reg->reg);
376
377 if (reg->val > 0xffff)
378 return -EIO;
379
380 return 0;
381 }
382
383 static int mt9v022_s_register(struct v4l2_subdev *sd,
384 struct v4l2_dbg_register *reg)
385 {
386 struct i2c_client *client = sd->priv;
387
388 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
389 return -EINVAL;
390
391 if (reg->match.addr != client->addr)
392 return -ENODEV;
393
394 if (reg_write(client, reg->reg, reg->val) < 0)
395 return -EIO;
396
397 return 0;
398 }
399 #endif
400
401 static const struct v4l2_queryctrl mt9v022_controls[] = {
402 {
403 .id = V4L2_CID_VFLIP,
404 .type = V4L2_CTRL_TYPE_BOOLEAN,
405 .name = "Flip Vertically",
406 .minimum = 0,
407 .maximum = 1,
408 .step = 1,
409 .default_value = 0,
410 }, {
411 .id = V4L2_CID_HFLIP,
412 .type = V4L2_CTRL_TYPE_BOOLEAN,
413 .name = "Flip Horizontally",
414 .minimum = 0,
415 .maximum = 1,
416 .step = 1,
417 .default_value = 0,
418 }, {
419 .id = V4L2_CID_GAIN,
420 .type = V4L2_CTRL_TYPE_INTEGER,
421 .name = "Analog Gain",
422 .minimum = 64,
423 .maximum = 127,
424 .step = 1,
425 .default_value = 64,
426 .flags = V4L2_CTRL_FLAG_SLIDER,
427 }, {
428 .id = V4L2_CID_EXPOSURE,
429 .type = V4L2_CTRL_TYPE_INTEGER,
430 .name = "Exposure",
431 .minimum = 1,
432 .maximum = 255,
433 .step = 1,
434 .default_value = 255,
435 .flags = V4L2_CTRL_FLAG_SLIDER,
436 }, {
437 .id = V4L2_CID_AUTOGAIN,
438 .type = V4L2_CTRL_TYPE_BOOLEAN,
439 .name = "Automatic Gain",
440 .minimum = 0,
441 .maximum = 1,
442 .step = 1,
443 .default_value = 1,
444 }, {
445 .id = V4L2_CID_EXPOSURE_AUTO,
446 .type = V4L2_CTRL_TYPE_BOOLEAN,
447 .name = "Automatic Exposure",
448 .minimum = 0,
449 .maximum = 1,
450 .step = 1,
451 .default_value = 1,
452 }
453 };
454
455 static struct soc_camera_ops mt9v022_ops = {
456 .init = mt9v022_init,
457 .set_crop = mt9v022_set_crop,
458 .set_bus_param = mt9v022_set_bus_param,
459 .query_bus_param = mt9v022_query_bus_param,
460 .controls = mt9v022_controls,
461 .num_controls = ARRAY_SIZE(mt9v022_controls),
462 };
463
464 static int mt9v022_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
465 {
466 struct i2c_client *client = sd->priv;
467 int data;
468
469 switch (ctrl->id) {
470 case V4L2_CID_VFLIP:
471 data = reg_read(client, MT9V022_READ_MODE);
472 if (data < 0)
473 return -EIO;
474 ctrl->value = !!(data & 0x10);
475 break;
476 case V4L2_CID_HFLIP:
477 data = reg_read(client, MT9V022_READ_MODE);
478 if (data < 0)
479 return -EIO;
480 ctrl->value = !!(data & 0x20);
481 break;
482 case V4L2_CID_EXPOSURE_AUTO:
483 data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
484 if (data < 0)
485 return -EIO;
486 ctrl->value = !!(data & 0x1);
487 break;
488 case V4L2_CID_AUTOGAIN:
489 data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
490 if (data < 0)
491 return -EIO;
492 ctrl->value = !!(data & 0x2);
493 break;
494 }
495 return 0;
496 }
497
498 static int mt9v022_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
499 {
500 int data;
501 struct i2c_client *client = sd->priv;
502 struct soc_camera_device *icd = client->dev.platform_data;
503 const struct v4l2_queryctrl *qctrl;
504
505 qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
506 if (!qctrl)
507 return -EINVAL;
508
509 switch (ctrl->id) {
510 case V4L2_CID_VFLIP:
511 if (ctrl->value)
512 data = reg_set(client, MT9V022_READ_MODE, 0x10);
513 else
514 data = reg_clear(client, MT9V022_READ_MODE, 0x10);
515 if (data < 0)
516 return -EIO;
517 break;
518 case V4L2_CID_HFLIP:
519 if (ctrl->value)
520 data = reg_set(client, MT9V022_READ_MODE, 0x20);
521 else
522 data = reg_clear(client, MT9V022_READ_MODE, 0x20);
523 if (data < 0)
524 return -EIO;
525 break;
526 case V4L2_CID_GAIN:
527 /* mt9v022 has minimum == default */
528 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
529 return -EINVAL;
530 else {
531 unsigned long range = qctrl->maximum - qctrl->minimum;
532 /* Datasheet says 16 to 64. autogain only works properly
533 * after setting gain to maximum 14. Larger values
534 * produce "white fly" noise effect. On the whole,
535 * manually setting analog gain does no good. */
536 unsigned long gain = ((ctrl->value - qctrl->minimum) *
537 10 + range / 2) / range + 4;
538 if (gain >= 32)
539 gain &= ~1;
540 /* The user wants to set gain manually, hope, she
541 * knows, what she's doing... Switch AGC off. */
542
543 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
544 return -EIO;
545
546 dev_info(&icd->dev, "Setting gain from %d to %lu\n",
547 reg_read(client, MT9V022_ANALOG_GAIN), gain);
548 if (reg_write(client, MT9V022_ANALOG_GAIN, gain) < 0)
549 return -EIO;
550 icd->gain = ctrl->value;
551 }
552 break;
553 case V4L2_CID_EXPOSURE:
554 /* mt9v022 has maximum == default */
555 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
556 return -EINVAL;
557 else {
558 unsigned long range = qctrl->maximum - qctrl->minimum;
559 unsigned long shutter = ((ctrl->value - qctrl->minimum) *
560 479 + range / 2) / range + 1;
561 /* The user wants to set shutter width manually, hope,
562 * she knows, what she's doing... Switch AEC off. */
563
564 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1) < 0)
565 return -EIO;
566
567 dev_dbg(&icd->dev, "Shutter width from %d to %lu\n",
568 reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
569 shutter);
570 if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
571 shutter) < 0)
572 return -EIO;
573 icd->exposure = ctrl->value;
574 }
575 break;
576 case V4L2_CID_AUTOGAIN:
577 if (ctrl->value)
578 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2);
579 else
580 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2);
581 if (data < 0)
582 return -EIO;
583 break;
584 case V4L2_CID_EXPOSURE_AUTO:
585 if (ctrl->value)
586 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
587 else
588 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
589 if (data < 0)
590 return -EIO;
591 break;
592 }
593 return 0;
594 }
595
596 /* Interface active, can use i2c. If it fails, it can indeed mean, that
597 * this wasn't our capture interface, so, we wait for the right one */
598 static int mt9v022_video_probe(struct soc_camera_device *icd,
599 struct i2c_client *client)
600 {
601 struct mt9v022 *mt9v022 = to_mt9v022(client);
602 struct soc_camera_link *icl = to_soc_camera_link(icd);
603 s32 data;
604 int ret;
605 unsigned long flags;
606
607 if (!icd->dev.parent ||
608 to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
609 return -ENODEV;
610
611 /* Read out the chip version register */
612 data = reg_read(client, MT9V022_CHIP_VERSION);
613
614 /* must be 0x1311 or 0x1313 */
615 if (data != 0x1311 && data != 0x1313) {
616 ret = -ENODEV;
617 dev_info(&icd->dev, "No MT9V022 detected, ID register 0x%x\n",
618 data);
619 goto ei2c;
620 }
621
622 /* Soft reset */
623 ret = reg_write(client, MT9V022_RESET, 1);
624 if (ret < 0)
625 goto ei2c;
626 /* 15 clock cycles */
627 udelay(200);
628 if (reg_read(client, MT9V022_RESET)) {
629 dev_err(&icd->dev, "Resetting MT9V022 failed!\n");
630 if (ret > 0)
631 ret = -EIO;
632 goto ei2c;
633 }
634
635 /* Set monochrome or colour sensor type */
636 if (sensor_type && (!strcmp("colour", sensor_type) ||
637 !strcmp("color", sensor_type))) {
638 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
639 mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
640 icd->formats = mt9v022_colour_formats;
641 } else {
642 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
643 mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
644 icd->formats = mt9v022_monochrome_formats;
645 }
646
647 if (ret < 0)
648 goto ei2c;
649
650 icd->num_formats = 0;
651
652 /*
653 * This is a 10bit sensor, so by default we only allow 10bit.
654 * The platform may support different bus widths due to
655 * different routing of the data lines.
656 */
657 if (icl->query_bus_param)
658 flags = icl->query_bus_param(icl);
659 else
660 flags = SOCAM_DATAWIDTH_10;
661
662 if (flags & SOCAM_DATAWIDTH_10)
663 icd->num_formats++;
664 else
665 icd->formats++;
666
667 if (flags & SOCAM_DATAWIDTH_8)
668 icd->num_formats++;
669
670 dev_info(&icd->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
671 data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
672 "monochrome" : "colour");
673
674 ei2c:
675 return ret;
676 }
677
678 static void mt9v022_video_remove(struct soc_camera_device *icd)
679 {
680 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
681 struct soc_camera_link *icl = to_soc_camera_link(icd);
682
683 dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", client->addr,
684 icd->dev.parent, icd->vdev);
685 if (icl->free_bus)
686 icl->free_bus(icl);
687 }
688
689 static struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
690 .g_ctrl = mt9v022_g_ctrl,
691 .s_ctrl = mt9v022_s_ctrl,
692 .g_chip_ident = mt9v022_g_chip_ident,
693 #ifdef CONFIG_VIDEO_ADV_DEBUG
694 .g_register = mt9v022_g_register,
695 .s_register = mt9v022_s_register,
696 #endif
697 };
698
699 static struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
700 .s_stream = mt9v022_s_stream,
701 .s_fmt = mt9v022_s_fmt,
702 .try_fmt = mt9v022_try_fmt,
703 };
704
705 static struct v4l2_subdev_ops mt9v022_subdev_ops = {
706 .core = &mt9v022_subdev_core_ops,
707 .video = &mt9v022_subdev_video_ops,
708 };
709
710 static int mt9v022_probe(struct i2c_client *client,
711 const struct i2c_device_id *did)
712 {
713 struct mt9v022 *mt9v022;
714 struct soc_camera_device *icd = client->dev.platform_data;
715 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
716 struct soc_camera_link *icl;
717 int ret;
718
719 if (!icd) {
720 dev_err(&client->dev, "MT9V022: missing soc-camera data!\n");
721 return -EINVAL;
722 }
723
724 icl = to_soc_camera_link(icd);
725 if (!icl) {
726 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
727 return -EINVAL;
728 }
729
730 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
731 dev_warn(&adapter->dev,
732 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
733 return -EIO;
734 }
735
736 mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL);
737 if (!mt9v022)
738 return -ENOMEM;
739
740 v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
741
742 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
743
744 icd->ops = &mt9v022_ops;
745 icd->x_min = 1;
746 icd->y_min = 4;
747 icd->x_current = 1;
748 icd->y_current = 4;
749 icd->width_min = 48;
750 icd->width_max = 752;
751 icd->height_min = 32;
752 icd->height_max = 480;
753 icd->y_skip_top = 1;
754
755 ret = mt9v022_video_probe(icd, client);
756 if (ret) {
757 icd->ops = NULL;
758 i2c_set_clientdata(client, NULL);
759 kfree(mt9v022);
760 }
761
762 return ret;
763 }
764
765 static int mt9v022_remove(struct i2c_client *client)
766 {
767 struct mt9v022 *mt9v022 = to_mt9v022(client);
768 struct soc_camera_device *icd = client->dev.platform_data;
769
770 icd->ops = NULL;
771 mt9v022_video_remove(icd);
772 i2c_set_clientdata(client, NULL);
773 client->driver = NULL;
774 kfree(mt9v022);
775
776 return 0;
777 }
778 static const struct i2c_device_id mt9v022_id[] = {
779 { "mt9v022", 0 },
780 { }
781 };
782 MODULE_DEVICE_TABLE(i2c, mt9v022_id);
783
784 static struct i2c_driver mt9v022_i2c_driver = {
785 .driver = {
786 .name = "mt9v022",
787 },
788 .probe = mt9v022_probe,
789 .remove = mt9v022_remove,
790 .id_table = mt9v022_id,
791 };
792
793 static int __init mt9v022_mod_init(void)
794 {
795 return i2c_add_driver(&mt9v022_i2c_driver);
796 }
797
798 static void __exit mt9v022_mod_exit(void)
799 {
800 i2c_del_driver(&mt9v022_i2c_driver);
801 }
802
803 module_init(mt9v022_mod_init);
804 module_exit(mt9v022_mod_exit);
805
806 MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
807 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
808 MODULE_LICENSE("GPL");
Support for the Chinese Samsung S3C2440 based development boards