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[mirror_ubuntu-artful-kernel.git] / drivers / media / video / mt9v022.c
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 #include <linux/module.h>
17
18 #include <media/v4l2-subdev.h>
19 #include <media/v4l2-chip-ident.h>
20 #include <media/soc_camera.h>
21
22 /*
23 * mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
24 * The platform has to define ctruct i2c_board_info objects and link to them
25 * from struct soc_camera_link
26 */
27
28 static char *sensor_type;
29 module_param(sensor_type, charp, S_IRUGO);
30 MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"");
31
32 /* mt9v022 selected register addresses */
33 #define MT9V022_CHIP_VERSION 0x00
34 #define MT9V022_COLUMN_START 0x01
35 #define MT9V022_ROW_START 0x02
36 #define MT9V022_WINDOW_HEIGHT 0x03
37 #define MT9V022_WINDOW_WIDTH 0x04
38 #define MT9V022_HORIZONTAL_BLANKING 0x05
39 #define MT9V022_VERTICAL_BLANKING 0x06
40 #define MT9V022_CHIP_CONTROL 0x07
41 #define MT9V022_SHUTTER_WIDTH1 0x08
42 #define MT9V022_SHUTTER_WIDTH2 0x09
43 #define MT9V022_SHUTTER_WIDTH_CTRL 0x0a
44 #define MT9V022_TOTAL_SHUTTER_WIDTH 0x0b
45 #define MT9V022_RESET 0x0c
46 #define MT9V022_READ_MODE 0x0d
47 #define MT9V022_MONITOR_MODE 0x0e
48 #define MT9V022_PIXEL_OPERATION_MODE 0x0f
49 #define MT9V022_LED_OUT_CONTROL 0x1b
50 #define MT9V022_ADC_MODE_CONTROL 0x1c
51 #define MT9V022_ANALOG_GAIN 0x35
52 #define MT9V022_BLACK_LEVEL_CALIB_CTRL 0x47
53 #define MT9V022_PIXCLK_FV_LV 0x74
54 #define MT9V022_DIGITAL_TEST_PATTERN 0x7f
55 #define MT9V022_AEC_AGC_ENABLE 0xAF
56 #define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD
57
58 /* Progressive scan, master, defaults */
59 #define MT9V022_CHIP_CONTROL_DEFAULT 0x188
60
61 #define MT9V022_MAX_WIDTH 752
62 #define MT9V022_MAX_HEIGHT 480
63 #define MT9V022_MIN_WIDTH 48
64 #define MT9V022_MIN_HEIGHT 32
65 #define MT9V022_COLUMN_SKIP 1
66 #define MT9V022_ROW_SKIP 4
67
68 /* MT9V022 has only one fixed colorspace per pixelcode */
69 struct mt9v022_datafmt {
70 enum v4l2_mbus_pixelcode code;
71 enum v4l2_colorspace colorspace;
72 };
73
74 /* Find a data format by a pixel code in an array */
75 static const struct mt9v022_datafmt *mt9v022_find_datafmt(
76 enum v4l2_mbus_pixelcode code, const struct mt9v022_datafmt *fmt,
77 int n)
78 {
79 int i;
80 for (i = 0; i < n; i++)
81 if (fmt[i].code == code)
82 return fmt + i;
83
84 return NULL;
85 }
86
87 static const struct mt9v022_datafmt mt9v022_colour_fmts[] = {
88 /*
89 * Order important: first natively supported,
90 * second supported with a GPIO extender
91 */
92 {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
93 {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
94 };
95
96 static const struct mt9v022_datafmt mt9v022_monochrome_fmts[] = {
97 /* Order important - see above */
98 {V4L2_MBUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
99 {V4L2_MBUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG},
100 };
101
102 struct mt9v022 {
103 struct v4l2_subdev subdev;
104 struct v4l2_rect rect; /* Sensor window */
105 const struct mt9v022_datafmt *fmt;
106 const struct mt9v022_datafmt *fmts;
107 int num_fmts;
108 int model; /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */
109 u16 chip_control;
110 unsigned short y_skip_top; /* Lines to skip at the top */
111 };
112
113 static struct mt9v022 *to_mt9v022(const struct i2c_client *client)
114 {
115 return container_of(i2c_get_clientdata(client), struct mt9v022, subdev);
116 }
117
118 static int reg_read(struct i2c_client *client, const u8 reg)
119 {
120 s32 data = i2c_smbus_read_word_data(client, reg);
121 return data < 0 ? data : swab16(data);
122 }
123
124 static int reg_write(struct i2c_client *client, const u8 reg,
125 const u16 data)
126 {
127 return i2c_smbus_write_word_data(client, reg, swab16(data));
128 }
129
130 static int reg_set(struct i2c_client *client, const u8 reg,
131 const u16 data)
132 {
133 int ret;
134
135 ret = reg_read(client, reg);
136 if (ret < 0)
137 return ret;
138 return reg_write(client, reg, ret | data);
139 }
140
141 static int reg_clear(struct i2c_client *client, const u8 reg,
142 const u16 data)
143 {
144 int ret;
145
146 ret = reg_read(client, reg);
147 if (ret < 0)
148 return ret;
149 return reg_write(client, reg, ret & ~data);
150 }
151
152 static int mt9v022_init(struct i2c_client *client)
153 {
154 struct mt9v022 *mt9v022 = to_mt9v022(client);
155 int ret;
156
157 /*
158 * Almost the default mode: master, parallel, simultaneous, and an
159 * undocumented bit 0x200, which is present in table 7, but not in 8,
160 * plus snapshot mode to disable scan for now
161 */
162 mt9v022->chip_control |= 0x10;
163 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
164 if (!ret)
165 ret = reg_write(client, MT9V022_READ_MODE, 0x300);
166
167 /* All defaults */
168 if (!ret)
169 /* AEC, AGC on */
170 ret = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x3);
171 if (!ret)
172 ret = reg_write(client, MT9V022_ANALOG_GAIN, 16);
173 if (!ret)
174 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH, 480);
175 if (!ret)
176 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480);
177 if (!ret)
178 /* default - auto */
179 ret = reg_clear(client, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
180 if (!ret)
181 ret = reg_write(client, MT9V022_DIGITAL_TEST_PATTERN, 0);
182
183 return ret;
184 }
185
186 static int mt9v022_s_stream(struct v4l2_subdev *sd, int enable)
187 {
188 struct i2c_client *client = v4l2_get_subdevdata(sd);
189 struct mt9v022 *mt9v022 = to_mt9v022(client);
190
191 if (enable)
192 /* Switch to master "normal" mode */
193 mt9v022->chip_control &= ~0x10;
194 else
195 /* Switch to snapshot mode */
196 mt9v022->chip_control |= 0x10;
197
198 if (reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control) < 0)
199 return -EIO;
200 return 0;
201 }
202
203 static int mt9v022_set_bus_param(struct soc_camera_device *icd,
204 unsigned long flags)
205 {
206 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
207 struct mt9v022 *mt9v022 = to_mt9v022(client);
208 struct soc_camera_link *icl = to_soc_camera_link(icd);
209 unsigned int width_flag = flags & SOCAM_DATAWIDTH_MASK;
210 int ret;
211 u16 pixclk = 0;
212
213 /* Only one width bit may be set */
214 if (!is_power_of_2(width_flag))
215 return -EINVAL;
216
217 if (icl->set_bus_param) {
218 ret = icl->set_bus_param(icl, width_flag);
219 if (ret)
220 return ret;
221 } else {
222 /*
223 * Without board specific bus width settings we only support the
224 * sensors native bus width
225 */
226 if (width_flag != SOCAM_DATAWIDTH_10)
227 return -EINVAL;
228 }
229
230 flags = soc_camera_apply_sensor_flags(icl, flags);
231
232 if (flags & SOCAM_PCLK_SAMPLE_FALLING)
233 pixclk |= 0x10;
234
235 if (!(flags & SOCAM_HSYNC_ACTIVE_HIGH))
236 pixclk |= 0x1;
237
238 if (!(flags & SOCAM_VSYNC_ACTIVE_HIGH))
239 pixclk |= 0x2;
240
241 ret = reg_write(client, MT9V022_PIXCLK_FV_LV, pixclk);
242 if (ret < 0)
243 return ret;
244
245 if (!(flags & SOCAM_MASTER))
246 mt9v022->chip_control &= ~0x8;
247
248 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
249 if (ret < 0)
250 return ret;
251
252 dev_dbg(&client->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
253 pixclk, mt9v022->chip_control);
254
255 return 0;
256 }
257
258 static unsigned long mt9v022_query_bus_param(struct soc_camera_device *icd)
259 {
260 struct soc_camera_link *icl = to_soc_camera_link(icd);
261 unsigned int flags = SOCAM_MASTER | SOCAM_SLAVE |
262 SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
263 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW |
264 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW |
265 SOCAM_DATA_ACTIVE_HIGH;
266
267 if (icl->query_bus_param)
268 flags |= icl->query_bus_param(icl) & SOCAM_DATAWIDTH_MASK;
269 else
270 flags |= SOCAM_DATAWIDTH_10;
271
272 return soc_camera_apply_sensor_flags(icl, flags);
273 }
274
275 static int mt9v022_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
276 {
277 struct i2c_client *client = v4l2_get_subdevdata(sd);
278 struct mt9v022 *mt9v022 = to_mt9v022(client);
279 struct v4l2_rect rect = a->c;
280 int ret;
281
282 /* Bayer format - even size lengths */
283 if (mt9v022->fmts == mt9v022_colour_fmts) {
284 rect.width = ALIGN(rect.width, 2);
285 rect.height = ALIGN(rect.height, 2);
286 /* Let the user play with the starting pixel */
287 }
288
289 soc_camera_limit_side(&rect.left, &rect.width,
290 MT9V022_COLUMN_SKIP, MT9V022_MIN_WIDTH, MT9V022_MAX_WIDTH);
291
292 soc_camera_limit_side(&rect.top, &rect.height,
293 MT9V022_ROW_SKIP, MT9V022_MIN_HEIGHT, MT9V022_MAX_HEIGHT);
294
295 /* Like in example app. Contradicts the datasheet though */
296 ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
297 if (ret >= 0) {
298 if (ret & 1) /* Autoexposure */
299 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
300 rect.height + mt9v022->y_skip_top + 43);
301 else
302 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
303 rect.height + mt9v022->y_skip_top + 43);
304 }
305 /* Setup frame format: defaults apart from width and height */
306 if (!ret)
307 ret = reg_write(client, MT9V022_COLUMN_START, rect.left);
308 if (!ret)
309 ret = reg_write(client, MT9V022_ROW_START, rect.top);
310 if (!ret)
311 /*
312 * Default 94, Phytec driver says:
313 * "width + horizontal blank >= 660"
314 */
315 ret = reg_write(client, MT9V022_HORIZONTAL_BLANKING,
316 rect.width > 660 - 43 ? 43 :
317 660 - rect.width);
318 if (!ret)
319 ret = reg_write(client, MT9V022_VERTICAL_BLANKING, 45);
320 if (!ret)
321 ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect.width);
322 if (!ret)
323 ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
324 rect.height + mt9v022->y_skip_top);
325
326 if (ret < 0)
327 return ret;
328
329 dev_dbg(&client->dev, "Frame %dx%d pixel\n", rect.width, rect.height);
330
331 mt9v022->rect = rect;
332
333 return 0;
334 }
335
336 static int mt9v022_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
337 {
338 struct i2c_client *client = v4l2_get_subdevdata(sd);
339 struct mt9v022 *mt9v022 = to_mt9v022(client);
340
341 a->c = mt9v022->rect;
342 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
343
344 return 0;
345 }
346
347 static int mt9v022_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
348 {
349 a->bounds.left = MT9V022_COLUMN_SKIP;
350 a->bounds.top = MT9V022_ROW_SKIP;
351 a->bounds.width = MT9V022_MAX_WIDTH;
352 a->bounds.height = MT9V022_MAX_HEIGHT;
353 a->defrect = a->bounds;
354 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
355 a->pixelaspect.numerator = 1;
356 a->pixelaspect.denominator = 1;
357
358 return 0;
359 }
360
361 static int mt9v022_g_fmt(struct v4l2_subdev *sd,
362 struct v4l2_mbus_framefmt *mf)
363 {
364 struct i2c_client *client = v4l2_get_subdevdata(sd);
365 struct mt9v022 *mt9v022 = to_mt9v022(client);
366
367 mf->width = mt9v022->rect.width;
368 mf->height = mt9v022->rect.height;
369 mf->code = mt9v022->fmt->code;
370 mf->colorspace = mt9v022->fmt->colorspace;
371 mf->field = V4L2_FIELD_NONE;
372
373 return 0;
374 }
375
376 static int mt9v022_s_fmt(struct v4l2_subdev *sd,
377 struct v4l2_mbus_framefmt *mf)
378 {
379 struct i2c_client *client = v4l2_get_subdevdata(sd);
380 struct mt9v022 *mt9v022 = to_mt9v022(client);
381 struct v4l2_crop a = {
382 .c = {
383 .left = mt9v022->rect.left,
384 .top = mt9v022->rect.top,
385 .width = mf->width,
386 .height = mf->height,
387 },
388 };
389 int ret;
390
391 /*
392 * The caller provides a supported format, as verified per call to
393 * icd->try_fmt(), datawidth is from our supported format list
394 */
395 switch (mf->code) {
396 case V4L2_MBUS_FMT_Y8_1X8:
397 case V4L2_MBUS_FMT_Y10_1X10:
398 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM)
399 return -EINVAL;
400 break;
401 case V4L2_MBUS_FMT_SBGGR8_1X8:
402 case V4L2_MBUS_FMT_SBGGR10_1X10:
403 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC)
404 return -EINVAL;
405 break;
406 default:
407 return -EINVAL;
408 }
409
410 /* No support for scaling on this camera, just crop. */
411 ret = mt9v022_s_crop(sd, &a);
412 if (!ret) {
413 mf->width = mt9v022->rect.width;
414 mf->height = mt9v022->rect.height;
415 mt9v022->fmt = mt9v022_find_datafmt(mf->code,
416 mt9v022->fmts, mt9v022->num_fmts);
417 mf->colorspace = mt9v022->fmt->colorspace;
418 }
419
420 return ret;
421 }
422
423 static int mt9v022_try_fmt(struct v4l2_subdev *sd,
424 struct v4l2_mbus_framefmt *mf)
425 {
426 struct i2c_client *client = v4l2_get_subdevdata(sd);
427 struct mt9v022 *mt9v022 = to_mt9v022(client);
428 const struct mt9v022_datafmt *fmt;
429 int align = mf->code == V4L2_MBUS_FMT_SBGGR8_1X8 ||
430 mf->code == V4L2_MBUS_FMT_SBGGR10_1X10;
431
432 v4l_bound_align_image(&mf->width, MT9V022_MIN_WIDTH,
433 MT9V022_MAX_WIDTH, align,
434 &mf->height, MT9V022_MIN_HEIGHT + mt9v022->y_skip_top,
435 MT9V022_MAX_HEIGHT + mt9v022->y_skip_top, align, 0);
436
437 fmt = mt9v022_find_datafmt(mf->code, mt9v022->fmts,
438 mt9v022->num_fmts);
439 if (!fmt) {
440 fmt = mt9v022->fmt;
441 mf->code = fmt->code;
442 }
443
444 mf->colorspace = fmt->colorspace;
445
446 return 0;
447 }
448
449 static int mt9v022_g_chip_ident(struct v4l2_subdev *sd,
450 struct v4l2_dbg_chip_ident *id)
451 {
452 struct i2c_client *client = v4l2_get_subdevdata(sd);
453 struct mt9v022 *mt9v022 = to_mt9v022(client);
454
455 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
456 return -EINVAL;
457
458 if (id->match.addr != client->addr)
459 return -ENODEV;
460
461 id->ident = mt9v022->model;
462 id->revision = 0;
463
464 return 0;
465 }
466
467 #ifdef CONFIG_VIDEO_ADV_DEBUG
468 static int mt9v022_g_register(struct v4l2_subdev *sd,
469 struct v4l2_dbg_register *reg)
470 {
471 struct i2c_client *client = v4l2_get_subdevdata(sd);
472
473 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
474 return -EINVAL;
475
476 if (reg->match.addr != client->addr)
477 return -ENODEV;
478
479 reg->size = 2;
480 reg->val = reg_read(client, reg->reg);
481
482 if (reg->val > 0xffff)
483 return -EIO;
484
485 return 0;
486 }
487
488 static int mt9v022_s_register(struct v4l2_subdev *sd,
489 struct v4l2_dbg_register *reg)
490 {
491 struct i2c_client *client = v4l2_get_subdevdata(sd);
492
493 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
494 return -EINVAL;
495
496 if (reg->match.addr != client->addr)
497 return -ENODEV;
498
499 if (reg_write(client, reg->reg, reg->val) < 0)
500 return -EIO;
501
502 return 0;
503 }
504 #endif
505
506 static const struct v4l2_queryctrl mt9v022_controls[] = {
507 {
508 .id = V4L2_CID_VFLIP,
509 .type = V4L2_CTRL_TYPE_BOOLEAN,
510 .name = "Flip Vertically",
511 .minimum = 0,
512 .maximum = 1,
513 .step = 1,
514 .default_value = 0,
515 }, {
516 .id = V4L2_CID_HFLIP,
517 .type = V4L2_CTRL_TYPE_BOOLEAN,
518 .name = "Flip Horizontally",
519 .minimum = 0,
520 .maximum = 1,
521 .step = 1,
522 .default_value = 0,
523 }, {
524 .id = V4L2_CID_GAIN,
525 .type = V4L2_CTRL_TYPE_INTEGER,
526 .name = "Analog Gain",
527 .minimum = 64,
528 .maximum = 127,
529 .step = 1,
530 .default_value = 64,
531 .flags = V4L2_CTRL_FLAG_SLIDER,
532 }, {
533 .id = V4L2_CID_EXPOSURE,
534 .type = V4L2_CTRL_TYPE_INTEGER,
535 .name = "Exposure",
536 .minimum = 1,
537 .maximum = 255,
538 .step = 1,
539 .default_value = 255,
540 .flags = V4L2_CTRL_FLAG_SLIDER,
541 }, {
542 .id = V4L2_CID_AUTOGAIN,
543 .type = V4L2_CTRL_TYPE_BOOLEAN,
544 .name = "Automatic Gain",
545 .minimum = 0,
546 .maximum = 1,
547 .step = 1,
548 .default_value = 1,
549 }, {
550 .id = V4L2_CID_EXPOSURE_AUTO,
551 .type = V4L2_CTRL_TYPE_BOOLEAN,
552 .name = "Automatic Exposure",
553 .minimum = 0,
554 .maximum = 1,
555 .step = 1,
556 .default_value = 1,
557 }
558 };
559
560 static struct soc_camera_ops mt9v022_ops = {
561 .set_bus_param = mt9v022_set_bus_param,
562 .query_bus_param = mt9v022_query_bus_param,
563 .controls = mt9v022_controls,
564 .num_controls = ARRAY_SIZE(mt9v022_controls),
565 };
566
567 static int mt9v022_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
568 {
569 struct i2c_client *client = v4l2_get_subdevdata(sd);
570 const struct v4l2_queryctrl *qctrl;
571 unsigned long range;
572 int data;
573
574 qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
575
576 switch (ctrl->id) {
577 case V4L2_CID_VFLIP:
578 data = reg_read(client, MT9V022_READ_MODE);
579 if (data < 0)
580 return -EIO;
581 ctrl->value = !!(data & 0x10);
582 break;
583 case V4L2_CID_HFLIP:
584 data = reg_read(client, MT9V022_READ_MODE);
585 if (data < 0)
586 return -EIO;
587 ctrl->value = !!(data & 0x20);
588 break;
589 case V4L2_CID_EXPOSURE_AUTO:
590 data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
591 if (data < 0)
592 return -EIO;
593 ctrl->value = !!(data & 0x1);
594 break;
595 case V4L2_CID_AUTOGAIN:
596 data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
597 if (data < 0)
598 return -EIO;
599 ctrl->value = !!(data & 0x2);
600 break;
601 case V4L2_CID_GAIN:
602 data = reg_read(client, MT9V022_ANALOG_GAIN);
603 if (data < 0)
604 return -EIO;
605
606 range = qctrl->maximum - qctrl->minimum;
607 ctrl->value = ((data - 16) * range + 24) / 48 + qctrl->minimum;
608
609 break;
610 case V4L2_CID_EXPOSURE:
611 data = reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH);
612 if (data < 0)
613 return -EIO;
614
615 range = qctrl->maximum - qctrl->minimum;
616 ctrl->value = ((data - 1) * range + 239) / 479 + qctrl->minimum;
617
618 break;
619 }
620 return 0;
621 }
622
623 static int mt9v022_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
624 {
625 int data;
626 struct i2c_client *client = v4l2_get_subdevdata(sd);
627 const struct v4l2_queryctrl *qctrl;
628
629 qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
630 if (!qctrl)
631 return -EINVAL;
632
633 switch (ctrl->id) {
634 case V4L2_CID_VFLIP:
635 if (ctrl->value)
636 data = reg_set(client, MT9V022_READ_MODE, 0x10);
637 else
638 data = reg_clear(client, MT9V022_READ_MODE, 0x10);
639 if (data < 0)
640 return -EIO;
641 break;
642 case V4L2_CID_HFLIP:
643 if (ctrl->value)
644 data = reg_set(client, MT9V022_READ_MODE, 0x20);
645 else
646 data = reg_clear(client, MT9V022_READ_MODE, 0x20);
647 if (data < 0)
648 return -EIO;
649 break;
650 case V4L2_CID_GAIN:
651 /* mt9v022 has minimum == default */
652 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
653 return -EINVAL;
654 else {
655 unsigned long range = qctrl->maximum - qctrl->minimum;
656 /* Valid values 16 to 64, 32 to 64 must be even. */
657 unsigned long gain = ((ctrl->value - qctrl->minimum) *
658 48 + range / 2) / range + 16;
659 if (gain >= 32)
660 gain &= ~1;
661 /*
662 * The user wants to set gain manually, hope, she
663 * knows, what she's doing... Switch AGC off.
664 */
665
666 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
667 return -EIO;
668
669 dev_dbg(&client->dev, "Setting gain from %d to %lu\n",
670 reg_read(client, MT9V022_ANALOG_GAIN), gain);
671 if (reg_write(client, MT9V022_ANALOG_GAIN, gain) < 0)
672 return -EIO;
673 }
674 break;
675 case V4L2_CID_EXPOSURE:
676 /* mt9v022 has maximum == default */
677 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
678 return -EINVAL;
679 else {
680 unsigned long range = qctrl->maximum - qctrl->minimum;
681 unsigned long shutter = ((ctrl->value - qctrl->minimum) *
682 479 + range / 2) / range + 1;
683 /*
684 * The user wants to set shutter width manually, hope,
685 * she knows, what she's doing... Switch AEC off.
686 */
687
688 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1) < 0)
689 return -EIO;
690
691 dev_dbg(&client->dev, "Shutter width from %d to %lu\n",
692 reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
693 shutter);
694 if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
695 shutter) < 0)
696 return -EIO;
697 }
698 break;
699 case V4L2_CID_AUTOGAIN:
700 if (ctrl->value)
701 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2);
702 else
703 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2);
704 if (data < 0)
705 return -EIO;
706 break;
707 case V4L2_CID_EXPOSURE_AUTO:
708 if (ctrl->value)
709 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
710 else
711 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
712 if (data < 0)
713 return -EIO;
714 break;
715 }
716 return 0;
717 }
718
719 /*
720 * Interface active, can use i2c. If it fails, it can indeed mean, that
721 * this wasn't our capture interface, so, we wait for the right one
722 */
723 static int mt9v022_video_probe(struct soc_camera_device *icd,
724 struct i2c_client *client)
725 {
726 struct mt9v022 *mt9v022 = to_mt9v022(client);
727 struct soc_camera_link *icl = to_soc_camera_link(icd);
728 s32 data;
729 int ret;
730 unsigned long flags;
731
732 /* We must have a parent by now. And it cannot be a wrong one. */
733 BUG_ON(!icd->parent ||
734 to_soc_camera_host(icd->parent)->nr != icd->iface);
735
736 /* Read out the chip version register */
737 data = reg_read(client, MT9V022_CHIP_VERSION);
738
739 /* must be 0x1311 or 0x1313 */
740 if (data != 0x1311 && data != 0x1313) {
741 ret = -ENODEV;
742 dev_info(&client->dev, "No MT9V022 found, ID register 0x%x\n",
743 data);
744 goto ei2c;
745 }
746
747 /* Soft reset */
748 ret = reg_write(client, MT9V022_RESET, 1);
749 if (ret < 0)
750 goto ei2c;
751 /* 15 clock cycles */
752 udelay(200);
753 if (reg_read(client, MT9V022_RESET)) {
754 dev_err(&client->dev, "Resetting MT9V022 failed!\n");
755 if (ret > 0)
756 ret = -EIO;
757 goto ei2c;
758 }
759
760 /* Set monochrome or colour sensor type */
761 if (sensor_type && (!strcmp("colour", sensor_type) ||
762 !strcmp("color", sensor_type))) {
763 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
764 mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
765 mt9v022->fmts = mt9v022_colour_fmts;
766 } else {
767 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
768 mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
769 mt9v022->fmts = mt9v022_monochrome_fmts;
770 }
771
772 if (ret < 0)
773 goto ei2c;
774
775 mt9v022->num_fmts = 0;
776
777 /*
778 * This is a 10bit sensor, so by default we only allow 10bit.
779 * The platform may support different bus widths due to
780 * different routing of the data lines.
781 */
782 if (icl->query_bus_param)
783 flags = icl->query_bus_param(icl);
784 else
785 flags = SOCAM_DATAWIDTH_10;
786
787 if (flags & SOCAM_DATAWIDTH_10)
788 mt9v022->num_fmts++;
789 else
790 mt9v022->fmts++;
791
792 if (flags & SOCAM_DATAWIDTH_8)
793 mt9v022->num_fmts++;
794
795 mt9v022->fmt = &mt9v022->fmts[0];
796
797 dev_info(&client->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
798 data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
799 "monochrome" : "colour");
800
801 ret = mt9v022_init(client);
802 if (ret < 0)
803 dev_err(&client->dev, "Failed to initialise the camera\n");
804
805 ei2c:
806 return ret;
807 }
808
809 static void mt9v022_video_remove(struct soc_camera_device *icd)
810 {
811 struct soc_camera_link *icl = to_soc_camera_link(icd);
812
813 dev_dbg(icd->pdev, "Video removed: %p, %p\n",
814 icd->parent, icd->vdev);
815 if (icl->free_bus)
816 icl->free_bus(icl);
817 }
818
819 static int mt9v022_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
820 {
821 struct i2c_client *client = v4l2_get_subdevdata(sd);
822 struct mt9v022 *mt9v022 = to_mt9v022(client);
823
824 *lines = mt9v022->y_skip_top;
825
826 return 0;
827 }
828
829 static struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
830 .g_ctrl = mt9v022_g_ctrl,
831 .s_ctrl = mt9v022_s_ctrl,
832 .g_chip_ident = mt9v022_g_chip_ident,
833 #ifdef CONFIG_VIDEO_ADV_DEBUG
834 .g_register = mt9v022_g_register,
835 .s_register = mt9v022_s_register,
836 #endif
837 };
838
839 static int mt9v022_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
840 enum v4l2_mbus_pixelcode *code)
841 {
842 struct i2c_client *client = v4l2_get_subdevdata(sd);
843 struct mt9v022 *mt9v022 = to_mt9v022(client);
844
845 if (index >= mt9v022->num_fmts)
846 return -EINVAL;
847
848 *code = mt9v022->fmts[index].code;
849 return 0;
850 }
851
852 static struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
853 .s_stream = mt9v022_s_stream,
854 .s_mbus_fmt = mt9v022_s_fmt,
855 .g_mbus_fmt = mt9v022_g_fmt,
856 .try_mbus_fmt = mt9v022_try_fmt,
857 .s_crop = mt9v022_s_crop,
858 .g_crop = mt9v022_g_crop,
859 .cropcap = mt9v022_cropcap,
860 .enum_mbus_fmt = mt9v022_enum_fmt,
861 };
862
863 static struct v4l2_subdev_sensor_ops mt9v022_subdev_sensor_ops = {
864 .g_skip_top_lines = mt9v022_g_skip_top_lines,
865 };
866
867 static struct v4l2_subdev_ops mt9v022_subdev_ops = {
868 .core = &mt9v022_subdev_core_ops,
869 .video = &mt9v022_subdev_video_ops,
870 .sensor = &mt9v022_subdev_sensor_ops,
871 };
872
873 static int mt9v022_probe(struct i2c_client *client,
874 const struct i2c_device_id *did)
875 {
876 struct mt9v022 *mt9v022;
877 struct soc_camera_device *icd = client->dev.platform_data;
878 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
879 struct soc_camera_link *icl;
880 int ret;
881
882 if (!icd) {
883 dev_err(&client->dev, "MT9V022: missing soc-camera data!\n");
884 return -EINVAL;
885 }
886
887 icl = to_soc_camera_link(icd);
888 if (!icl) {
889 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
890 return -EINVAL;
891 }
892
893 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
894 dev_warn(&adapter->dev,
895 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
896 return -EIO;
897 }
898
899 mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL);
900 if (!mt9v022)
901 return -ENOMEM;
902
903 v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
904
905 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
906
907 icd->ops = &mt9v022_ops;
908 /*
909 * MT9V022 _really_ corrupts the first read out line.
910 * TODO: verify on i.MX31
911 */
912 mt9v022->y_skip_top = 1;
913 mt9v022->rect.left = MT9V022_COLUMN_SKIP;
914 mt9v022->rect.top = MT9V022_ROW_SKIP;
915 mt9v022->rect.width = MT9V022_MAX_WIDTH;
916 mt9v022->rect.height = MT9V022_MAX_HEIGHT;
917
918 ret = mt9v022_video_probe(icd, client);
919 if (ret) {
920 icd->ops = NULL;
921 kfree(mt9v022);
922 }
923
924 return ret;
925 }
926
927 static int mt9v022_remove(struct i2c_client *client)
928 {
929 struct mt9v022 *mt9v022 = to_mt9v022(client);
930 struct soc_camera_device *icd = client->dev.platform_data;
931
932 icd->ops = NULL;
933 mt9v022_video_remove(icd);
934 kfree(mt9v022);
935
936 return 0;
937 }
938 static const struct i2c_device_id mt9v022_id[] = {
939 { "mt9v022", 0 },
940 { }
941 };
942 MODULE_DEVICE_TABLE(i2c, mt9v022_id);
943
944 static struct i2c_driver mt9v022_i2c_driver = {
945 .driver = {
946 .name = "mt9v022",
947 },
948 .probe = mt9v022_probe,
949 .remove = mt9v022_remove,
950 .id_table = mt9v022_id,
951 };
952
953 static int __init mt9v022_mod_init(void)
954 {
955 return i2c_add_driver(&mt9v022_i2c_driver);
956 }
957
958 static void __exit mt9v022_mod_exit(void)
959 {
960 i2c_del_driver(&mt9v022_i2c_driver);
961 }
962
963 module_init(mt9v022_mod_init);
964 module_exit(mt9v022_mod_exit);
965
966 MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
967 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
968 MODULE_LICENSE("GPL");
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