?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
powerpc: use consistent types in mktree
[zen-stable.git] / drivers / media / video / mt9v022.c
blobdbdcc86ae50dbb86d0d2dbf2df30fc5229271903
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-common.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 i2c_board_info
23 * and call i2c_register_board_info() */
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 i2c_client *client;
89 struct soc_camera_device icd;
90 int model; /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */
91 u16 chip_control;
92 };
93
94 static int reg_read(struct i2c_client *client, const u8 reg)
95 {
96 s32 data = i2c_smbus_read_word_data(client, reg);
97 return data < 0 ? data : swab16(data);
98 }
99
100 static int reg_write(struct i2c_client *client, const u8 reg,
101 const u16 data)
102 {
103 return i2c_smbus_write_word_data(client, reg, swab16(data));
104 }
105
106 static int reg_set(struct i2c_client *client, const u8 reg,
107 const u16 data)
108 {
109 int ret;
110
111 ret = reg_read(client, reg);
112 if (ret < 0)
113 return ret;
114 return reg_write(client, reg, ret | data);
115 }
116
117 static int reg_clear(struct i2c_client *client, const u8 reg,
118 const u16 data)
119 {
120 int ret;
121
122 ret = reg_read(client, reg);
123 if (ret < 0)
124 return ret;
125 return reg_write(client, reg, ret & ~data);
126 }
127
128 static int mt9v022_init(struct soc_camera_device *icd)
129 {
130 struct i2c_client *client = to_i2c_client(icd->control);
131 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
132 struct soc_camera_link *icl = client->dev.platform_data;
133 int ret;
134
135 if (icl->power) {
136 ret = icl->power(&client->dev, 1);
137 if (ret < 0) {
138 dev_err(icd->vdev->parent,
139 "Platform failed to power-on the camera.\n");
140 return ret;
141 }
142 }
143
144 /*
145 * The camera could have been already on, we hard-reset it additionally,
146 * if available. Soft reset is done in video_probe().
147 */
148 if (icl->reset)
149 icl->reset(&client->dev);
150
151 /* Almost the default mode: master, parallel, simultaneous, and an
152 * undocumented bit 0x200, which is present in table 7, but not in 8,
153 * plus snapshot mode to disable scan for now */
154 mt9v022->chip_control |= 0x10;
155 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
156 if (!ret)
157 ret = reg_write(client, MT9V022_READ_MODE, 0x300);
158
159 /* All defaults */
160 if (!ret)
161 /* AEC, AGC on */
162 ret = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x3);
163 if (!ret)
164 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480);
165 if (!ret)
166 /* default - auto */
167 ret = reg_clear(client, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
168 if (!ret)
169 ret = reg_write(client, MT9V022_DIGITAL_TEST_PATTERN, 0);
170
171 return ret;
172 }
173
174 static int mt9v022_release(struct soc_camera_device *icd)
175 {
176 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
177 struct soc_camera_link *icl = mt9v022->client->dev.platform_data;
178
179 if (icl->power)
180 icl->power(&mt9v022->client->dev, 0);
181
182 return 0;
183 }
184
185 static int mt9v022_start_capture(struct soc_camera_device *icd)
186 {
187 struct i2c_client *client = to_i2c_client(icd->control);
188 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
189 /* Switch to master "normal" mode */
190 mt9v022->chip_control &= ~0x10;
191 if (reg_write(client, MT9V022_CHIP_CONTROL,
192 mt9v022->chip_control) < 0)
193 return -EIO;
194 return 0;
195 }
196
197 static int mt9v022_stop_capture(struct soc_camera_device *icd)
198 {
199 struct i2c_client *client = to_i2c_client(icd->control);
200 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
201 /* Switch to snapshot mode */
202 mt9v022->chip_control |= 0x10;
203 if (reg_write(client, MT9V022_CHIP_CONTROL,
204 mt9v022->chip_control) < 0)
205 return -EIO;
206 return 0;
207 }
208
209 static int mt9v022_set_bus_param(struct soc_camera_device *icd,
210 unsigned long flags)
211 {
212 struct i2c_client *client = to_i2c_client(icd->control);
213 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
214 struct soc_camera_link *icl = client->dev.platform_data;
215 unsigned int width_flag = flags & SOCAM_DATAWIDTH_MASK;
216 int ret;
217 u16 pixclk = 0;
218
219 /* Only one width bit may be set */
220 if (!is_power_of_2(width_flag))
221 return -EINVAL;
222
223 if (icl->set_bus_param) {
224 ret = icl->set_bus_param(icl, width_flag);
225 if (ret)
226 return ret;
227 } else {
228 /*
229 * Without board specific bus width settings we only support the
230 * sensors native bus width
231 */
232 if (width_flag != SOCAM_DATAWIDTH_10)
233 return -EINVAL;
234 }
235
236 flags = soc_camera_apply_sensor_flags(icl, flags);
237
238 if (flags & SOCAM_PCLK_SAMPLE_RISING)
239 pixclk |= 0x10;
240
241 if (!(flags & SOCAM_HSYNC_ACTIVE_HIGH))
242 pixclk |= 0x1;
243
244 if (!(flags & SOCAM_VSYNC_ACTIVE_HIGH))
245 pixclk |= 0x2;
246
247 ret = reg_write(client, MT9V022_PIXCLK_FV_LV, pixclk);
248 if (ret < 0)
249 return ret;
250
251 if (!(flags & SOCAM_MASTER))
252 mt9v022->chip_control &= ~0x8;
253
254 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
255 if (ret < 0)
256 return ret;
257
258 dev_dbg(&icd->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
259 pixclk, mt9v022->chip_control);
260
261 return 0;
262 }
263
264 static unsigned long mt9v022_query_bus_param(struct soc_camera_device *icd)
265 {
266 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
267 struct soc_camera_link *icl = mt9v022->client->dev.platform_data;
268 unsigned int width_flag;
269
270 if (icl->query_bus_param)
271 width_flag = icl->query_bus_param(icl) &
272 SOCAM_DATAWIDTH_MASK;
273 else
274 width_flag = SOCAM_DATAWIDTH_10;
275
276 return SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
277 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW |
278 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW |
279 SOCAM_DATA_ACTIVE_HIGH | SOCAM_MASTER | SOCAM_SLAVE |
280 width_flag;
281 }
282
283 static int mt9v022_set_crop(struct soc_camera_device *icd,
284 struct v4l2_rect *rect)
285 {
286 struct i2c_client *client = to_i2c_client(icd->control);
287 int ret;
288
289 /* Like in example app. Contradicts the datasheet though */
290 ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
291 if (ret >= 0) {
292 if (ret & 1) /* Autoexposure */
293 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
294 rect->height + icd->y_skip_top + 43);
295 else
296 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
297 rect->height + icd->y_skip_top + 43);
298 }
299 /* Setup frame format: defaults apart from width and height */
300 if (!ret)
301 ret = reg_write(client, MT9V022_COLUMN_START, rect->left);
302 if (!ret)
303 ret = reg_write(client, MT9V022_ROW_START, rect->top);
304 if (!ret)
305 /* Default 94, Phytec driver says:
306 * "width + horizontal blank >= 660" */
307 ret = reg_write(client, MT9V022_HORIZONTAL_BLANKING,
308 rect->width > 660 - 43 ? 43 :
309 660 - rect->width);
310 if (!ret)
311 ret = reg_write(client, MT9V022_VERTICAL_BLANKING, 45);
312 if (!ret)
313 ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect->width);
314 if (!ret)
315 ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
316 rect->height + icd->y_skip_top);
317
318 if (ret < 0)
319 return ret;
320
321 dev_dbg(&icd->dev, "Frame %ux%u pixel\n", rect->width, rect->height);
322
323 return 0;
324 }
325
326 static int mt9v022_set_fmt(struct soc_camera_device *icd,
327 struct v4l2_format *f)
328 {
329 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
330 struct v4l2_pix_format *pix = &f->fmt.pix;
331 struct v4l2_rect rect = {
332 .left = icd->x_current,
333 .top = icd->y_current,
334 .width = pix->width,
335 .height = pix->height,
336 };
337
338 /* The caller provides a supported format, as verified per call to
339 * icd->try_fmt(), datawidth is from our supported format list */
340 switch (pix->pixelformat) {
341 case V4L2_PIX_FMT_GREY:
342 case V4L2_PIX_FMT_Y16:
343 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM)
344 return -EINVAL;
345 break;
346 case V4L2_PIX_FMT_SBGGR8:
347 case V4L2_PIX_FMT_SBGGR16:
348 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC)
349 return -EINVAL;
350 break;
351 case 0:
352 /* No format change, only geometry */
353 break;
354 default:
355 return -EINVAL;
356 }
357
358 /* No support for scaling on this camera, just crop. */
359 return mt9v022_set_crop(icd, &rect);
360 }
361
362 static int mt9v022_try_fmt(struct soc_camera_device *icd,
363 struct v4l2_format *f)
364 {
365 struct v4l2_pix_format *pix = &f->fmt.pix;
366
367 v4l_bound_align_image(&pix->width, 48, 752, 2 /* ? */,
368 &pix->height, 32 + icd->y_skip_top,
369 480 + icd->y_skip_top, 0, 0);
370
371 return 0;
372 }
373
374 static int mt9v022_get_chip_id(struct soc_camera_device *icd,
375 struct v4l2_dbg_chip_ident *id)
376 {
377 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
378
379 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
380 return -EINVAL;
381
382 if (id->match.addr != mt9v022->client->addr)
383 return -ENODEV;
384
385 id->ident = mt9v022->model;
386 id->revision = 0;
387
388 return 0;
389 }
390
391 #ifdef CONFIG_VIDEO_ADV_DEBUG
392 static int mt9v022_get_register(struct soc_camera_device *icd,
393 struct v4l2_dbg_register *reg)
394 {
395 struct i2c_client *client = to_i2c_client(icd->control);
396
397 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
398 return -EINVAL;
399
400 if (reg->match.addr != client->addr)
401 return -ENODEV;
402
403 reg->size = 2;
404 reg->val = reg_read(client, reg->reg);
405
406 if (reg->val > 0xffff)
407 return -EIO;
408
409 return 0;
410 }
411
412 static int mt9v022_set_register(struct soc_camera_device *icd,
413 struct v4l2_dbg_register *reg)
414 {
415 struct i2c_client *client = to_i2c_client(icd->control);
416
417 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
418 return -EINVAL;
419
420 if (reg->match.addr != client->addr)
421 return -ENODEV;
422
423 if (reg_write(client, reg->reg, reg->val) < 0)
424 return -EIO;
425
426 return 0;
427 }
428 #endif
429
430 static const struct v4l2_queryctrl mt9v022_controls[] = {
431 {
432 .id = V4L2_CID_VFLIP,
433 .type = V4L2_CTRL_TYPE_BOOLEAN,
434 .name = "Flip Vertically",
435 .minimum = 0,
436 .maximum = 1,
437 .step = 1,
438 .default_value = 0,
439 }, {
440 .id = V4L2_CID_HFLIP,
441 .type = V4L2_CTRL_TYPE_BOOLEAN,
442 .name = "Flip Horizontally",
443 .minimum = 0,
444 .maximum = 1,
445 .step = 1,
446 .default_value = 0,
447 }, {
448 .id = V4L2_CID_GAIN,
449 .type = V4L2_CTRL_TYPE_INTEGER,
450 .name = "Analog Gain",
451 .minimum = 64,
452 .maximum = 127,
453 .step = 1,
454 .default_value = 64,
455 .flags = V4L2_CTRL_FLAG_SLIDER,
456 }, {
457 .id = V4L2_CID_EXPOSURE,
458 .type = V4L2_CTRL_TYPE_INTEGER,
459 .name = "Exposure",
460 .minimum = 1,
461 .maximum = 255,
462 .step = 1,
463 .default_value = 255,
464 .flags = V4L2_CTRL_FLAG_SLIDER,
465 }, {
466 .id = V4L2_CID_AUTOGAIN,
467 .type = V4L2_CTRL_TYPE_BOOLEAN,
468 .name = "Automatic Gain",
469 .minimum = 0,
470 .maximum = 1,
471 .step = 1,
472 .default_value = 1,
473 }, {
474 .id = V4L2_CID_EXPOSURE_AUTO,
475 .type = V4L2_CTRL_TYPE_BOOLEAN,
476 .name = "Automatic Exposure",
477 .minimum = 0,
478 .maximum = 1,
479 .step = 1,
480 .default_value = 1,
481 }
482 };
483
484 static int mt9v022_video_probe(struct soc_camera_device *);
485 static void mt9v022_video_remove(struct soc_camera_device *);
486 static int mt9v022_get_control(struct soc_camera_device *, struct v4l2_control *);
487 static int mt9v022_set_control(struct soc_camera_device *, struct v4l2_control *);
488
489 static struct soc_camera_ops mt9v022_ops = {
490 .owner = THIS_MODULE,
491 .probe = mt9v022_video_probe,
492 .remove = mt9v022_video_remove,
493 .init = mt9v022_init,
494 .release = mt9v022_release,
495 .start_capture = mt9v022_start_capture,
496 .stop_capture = mt9v022_stop_capture,
497 .set_crop = mt9v022_set_crop,
498 .set_fmt = mt9v022_set_fmt,
499 .try_fmt = mt9v022_try_fmt,
500 .set_bus_param = mt9v022_set_bus_param,
501 .query_bus_param = mt9v022_query_bus_param,
502 .controls = mt9v022_controls,
503 .num_controls = ARRAY_SIZE(mt9v022_controls),
504 .get_control = mt9v022_get_control,
505 .set_control = mt9v022_set_control,
506 .get_chip_id = mt9v022_get_chip_id,
507 #ifdef CONFIG_VIDEO_ADV_DEBUG
508 .get_register = mt9v022_get_register,
509 .set_register = mt9v022_set_register,
510 #endif
511 };
512
513 static int mt9v022_get_control(struct soc_camera_device *icd,
514 struct v4l2_control *ctrl)
515 {
516 struct i2c_client *client = to_i2c_client(icd->control);
517 int data;
518
519 switch (ctrl->id) {
520 case V4L2_CID_VFLIP:
521 data = reg_read(client, MT9V022_READ_MODE);
522 if (data < 0)
523 return -EIO;
524 ctrl->value = !!(data & 0x10);
525 break;
526 case V4L2_CID_HFLIP:
527 data = reg_read(client, MT9V022_READ_MODE);
528 if (data < 0)
529 return -EIO;
530 ctrl->value = !!(data & 0x20);
531 break;
532 case V4L2_CID_EXPOSURE_AUTO:
533 data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
534 if (data < 0)
535 return -EIO;
536 ctrl->value = !!(data & 0x1);
537 break;
538 case V4L2_CID_AUTOGAIN:
539 data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
540 if (data < 0)
541 return -EIO;
542 ctrl->value = !!(data & 0x2);
543 break;
544 }
545 return 0;
546 }
547
548 static int mt9v022_set_control(struct soc_camera_device *icd,
549 struct v4l2_control *ctrl)
550 {
551 int data;
552 struct i2c_client *client = to_i2c_client(icd->control);
553 const struct v4l2_queryctrl *qctrl;
554
555 qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
556
557 if (!qctrl)
558 return -EINVAL;
559
560 switch (ctrl->id) {
561 case V4L2_CID_VFLIP:
562 if (ctrl->value)
563 data = reg_set(client, MT9V022_READ_MODE, 0x10);
564 else
565 data = reg_clear(client, MT9V022_READ_MODE, 0x10);
566 if (data < 0)
567 return -EIO;
568 break;
569 case V4L2_CID_HFLIP:
570 if (ctrl->value)
571 data = reg_set(client, MT9V022_READ_MODE, 0x20);
572 else
573 data = reg_clear(client, MT9V022_READ_MODE, 0x20);
574 if (data < 0)
575 return -EIO;
576 break;
577 case V4L2_CID_GAIN:
578 /* mt9v022 has minimum == default */
579 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
580 return -EINVAL;
581 else {
582 unsigned long range = qctrl->maximum - qctrl->minimum;
583 /* Datasheet says 16 to 64. autogain only works properly
584 * after setting gain to maximum 14. Larger values
585 * produce "white fly" noise effect. On the whole,
586 * manually setting analog gain does no good. */
587 unsigned long gain = ((ctrl->value - qctrl->minimum) *
588 10 + range / 2) / range + 4;
589 if (gain >= 32)
590 gain &= ~1;
591 /* The user wants to set gain manually, hope, she
592 * knows, what she's doing... Switch AGC off. */
593
594 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
595 return -EIO;
596
597 dev_info(&icd->dev, "Setting gain from %d to %lu\n",
598 reg_read(client, MT9V022_ANALOG_GAIN), gain);
599 if (reg_write(client, MT9V022_ANALOG_GAIN, gain) < 0)
600 return -EIO;
601 icd->gain = ctrl->value;
602 }
603 break;
604 case V4L2_CID_EXPOSURE:
605 /* mt9v022 has maximum == default */
606 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
607 return -EINVAL;
608 else {
609 unsigned long range = qctrl->maximum - qctrl->minimum;
610 unsigned long shutter = ((ctrl->value - qctrl->minimum) *
611 479 + range / 2) / range + 1;
612 /* The user wants to set shutter width manually, hope,
613 * she knows, what she's doing... Switch AEC off. */
614
615 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1) < 0)
616 return -EIO;
617
618 dev_dbg(&icd->dev, "Shutter width from %d to %lu\n",
619 reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
620 shutter);
621 if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
622 shutter) < 0)
623 return -EIO;
624 icd->exposure = ctrl->value;
625 }
626 break;
627 case V4L2_CID_AUTOGAIN:
628 if (ctrl->value)
629 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2);
630 else
631 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2);
632 if (data < 0)
633 return -EIO;
634 break;
635 case V4L2_CID_EXPOSURE_AUTO:
636 if (ctrl->value)
637 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
638 else
639 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
640 if (data < 0)
641 return -EIO;
642 break;
643 }
644 return 0;
645 }
646
647 /* Interface active, can use i2c. If it fails, it can indeed mean, that
648 * this wasn't our capture interface, so, we wait for the right one */
649 static int mt9v022_video_probe(struct soc_camera_device *icd)
650 {
651 struct i2c_client *client = to_i2c_client(icd->control);
652 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
653 struct soc_camera_link *icl = client->dev.platform_data;
654 s32 data;
655 int ret;
656 unsigned long flags;
657
658 if (!icd->dev.parent ||
659 to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
660 return -ENODEV;
661
662 /* Read out the chip version register */
663 data = reg_read(client, MT9V022_CHIP_VERSION);
664
665 /* must be 0x1311 or 0x1313 */
666 if (data != 0x1311 && data != 0x1313) {
667 ret = -ENODEV;
668 dev_info(&icd->dev, "No MT9V022 detected, ID register 0x%x\n",
669 data);
670 goto ei2c;
671 }
672
673 /* Soft reset */
674 ret = reg_write(client, MT9V022_RESET, 1);
675 if (ret < 0)
676 goto ei2c;
677 /* 15 clock cycles */
678 udelay(200);
679 if (reg_read(client, MT9V022_RESET)) {
680 dev_err(&icd->dev, "Resetting MT9V022 failed!\n");
681 goto ei2c;
682 }
683
684 /* Set monochrome or colour sensor type */
685 if (sensor_type && (!strcmp("colour", sensor_type) ||
686 !strcmp("color", sensor_type))) {
687 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
688 mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
689 icd->formats = mt9v022_colour_formats;
690 } else {
691 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
692 mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
693 icd->formats = mt9v022_monochrome_formats;
694 }
695
696 if (ret < 0)
697 goto eisis;
698
699 icd->num_formats = 0;
700
701 /*
702 * This is a 10bit sensor, so by default we only allow 10bit.
703 * The platform may support different bus widths due to
704 * different routing of the data lines.
705 */
706 if (icl->query_bus_param)
707 flags = icl->query_bus_param(icl);
708 else
709 flags = SOCAM_DATAWIDTH_10;
710
711 if (flags & SOCAM_DATAWIDTH_10)
712 icd->num_formats++;
713 else
714 icd->formats++;
715
716 if (flags & SOCAM_DATAWIDTH_8)
717 icd->num_formats++;
718
719 ret = soc_camera_video_start(icd);
720 if (ret < 0)
721 goto eisis;
722
723 dev_info(&icd->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
724 data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
725 "monochrome" : "colour");
726
727 return 0;
728
729 eisis:
730 ei2c:
731 return ret;
732 }
733
734 static void mt9v022_video_remove(struct soc_camera_device *icd)
735 {
736 struct mt9v022 *mt9v022 = container_of(icd, struct mt9v022, icd);
737 struct soc_camera_link *icl = mt9v022->client->dev.platform_data;
738
739 dev_dbg(&icd->dev, "Video %x removed: %p, %p\n", mt9v022->client->addr,
740 icd->dev.parent, icd->vdev);
741 soc_camera_video_stop(icd);
742 if (icl->free_bus)
743 icl->free_bus(icl);
744 }
745
746 static int mt9v022_probe(struct i2c_client *client,
747 const struct i2c_device_id *did)
748 {
749 struct mt9v022 *mt9v022;
750 struct soc_camera_device *icd;
751 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
752 struct soc_camera_link *icl = client->dev.platform_data;
753 int ret;
754
755 if (!icl) {
756 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
757 return -EINVAL;
758 }
759
760 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
761 dev_warn(&adapter->dev,
762 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
763 return -EIO;
764 }
765
766 mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL);
767 if (!mt9v022)
768 return -ENOMEM;
769
770 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
771 mt9v022->client = client;
772 i2c_set_clientdata(client, mt9v022);
773
774 icd = &mt9v022->icd;
775 icd->ops = &mt9v022_ops;
776 icd->control = &client->dev;
777 icd->x_min = 1;
778 icd->y_min = 4;
779 icd->x_current = 1;
780 icd->y_current = 4;
781 icd->width_min = 48;
782 icd->width_max = 752;
783 icd->height_min = 32;
784 icd->height_max = 480;
785 icd->y_skip_top = 1;
786 icd->iface = icl->bus_id;
787
788 ret = soc_camera_device_register(icd);
789 if (ret)
790 goto eisdr;
791
792 return 0;
793
794 eisdr:
795 kfree(mt9v022);
796 return ret;
797 }
798
799 static int mt9v022_remove(struct i2c_client *client)
800 {
801 struct mt9v022 *mt9v022 = i2c_get_clientdata(client);
802
803 soc_camera_device_unregister(&mt9v022->icd);
804 kfree(mt9v022);
805
806 return 0;
807 }
808 static const struct i2c_device_id mt9v022_id[] = {
809 { "mt9v022", 0 },
810 { }
811 };
812 MODULE_DEVICE_TABLE(i2c, mt9v022_id);
813
814 static struct i2c_driver mt9v022_i2c_driver = {
815 .driver = {
816 .name = "mt9v022",
817 },
818 .probe = mt9v022_probe,
819 .remove = mt9v022_remove,
820 .id_table = mt9v022_id,
821 };
822
823 static int __init mt9v022_mod_init(void)
824 {
825 return i2c_add_driver(&mt9v022_i2c_driver);
826 }
827
828 static void __exit mt9v022_mod_exit(void)
829 {
830 i2c_del_driver(&mt9v022_i2c_driver);
831 }
832
833 module_init(mt9v022_mod_init);
834 module_exit(mt9v022_mod_exit);
835
836 MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
837 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
838 MODULE_LICENSE("GPL");