2 * Driver for MT9V022 CMOS Image Sensor from Micron
4 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
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.
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>
18 #include <media/mt9v022.h>
19 #include <media/soc_camera.h>
20 #include <media/soc_mediabus.h>
21 #include <media/v4l2-subdev.h>
22 #include <media/v4l2-chip-ident.h>
23 #include <media/v4l2-ctrls.h>
26 * mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
27 * The platform has to define struct i2c_board_info objects and link to them
28 * from struct soc_camera_host_desc
31 static char *sensor_type;
32 module_param(sensor_type, charp, S_IRUGO);
33 MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"");
35 /* mt9v022 selected register addresses */
36 #define MT9V022_CHIP_VERSION 0x00
37 #define MT9V022_COLUMN_START 0x01
38 #define MT9V022_ROW_START 0x02
39 #define MT9V022_WINDOW_HEIGHT 0x03
40 #define MT9V022_WINDOW_WIDTH 0x04
41 #define MT9V022_HORIZONTAL_BLANKING 0x05
42 #define MT9V022_VERTICAL_BLANKING 0x06
43 #define MT9V022_CHIP_CONTROL 0x07
44 #define MT9V022_SHUTTER_WIDTH1 0x08
45 #define MT9V022_SHUTTER_WIDTH2 0x09
46 #define MT9V022_SHUTTER_WIDTH_CTRL 0x0a
47 #define MT9V022_TOTAL_SHUTTER_WIDTH 0x0b
48 #define MT9V022_RESET 0x0c
49 #define MT9V022_READ_MODE 0x0d
50 #define MT9V022_MONITOR_MODE 0x0e
51 #define MT9V022_PIXEL_OPERATION_MODE 0x0f
52 #define MT9V022_LED_OUT_CONTROL 0x1b
53 #define MT9V022_ADC_MODE_CONTROL 0x1c
54 #define MT9V022_REG32 0x20
55 #define MT9V022_ANALOG_GAIN 0x35
56 #define MT9V022_BLACK_LEVEL_CALIB_CTRL 0x47
57 #define MT9V022_PIXCLK_FV_LV 0x74
58 #define MT9V022_DIGITAL_TEST_PATTERN 0x7f
59 #define MT9V022_AEC_AGC_ENABLE 0xAF
60 #define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD
62 /* mt9v024 partial list register addresses changes with respect to mt9v022 */
63 #define MT9V024_PIXCLK_FV_LV 0x72
64 #define MT9V024_MAX_TOTAL_SHUTTER_WIDTH 0xAD
66 /* Progressive scan, master, defaults */
67 #define MT9V022_CHIP_CONTROL_DEFAULT 0x188
69 #define MT9V022_MAX_WIDTH 752
70 #define MT9V022_MAX_HEIGHT 480
71 #define MT9V022_MIN_WIDTH 48
72 #define MT9V022_MIN_HEIGHT 32
73 #define MT9V022_COLUMN_SKIP 1
74 #define MT9V022_ROW_SKIP 4
76 #define MT9V022_HORIZONTAL_BLANKING_MIN 43
77 #define MT9V022_HORIZONTAL_BLANKING_MAX 1023
78 #define MT9V022_HORIZONTAL_BLANKING_DEF 94
79 #define MT9V022_VERTICAL_BLANKING_MIN 2
80 #define MT9V022_VERTICAL_BLANKING_MAX 3000
81 #define MT9V022_VERTICAL_BLANKING_DEF 45
83 #define is_mt9v022_rev3(id) (id == 0x1313)
84 #define is_mt9v024(id) (id == 0x1324)
86 /* MT9V022 has only one fixed colorspace per pixelcode */
87 struct mt9v022_datafmt {
88 enum v4l2_mbus_pixelcode code;
89 enum v4l2_colorspace colorspace;
92 /* Find a data format by a pixel code in an array */
93 static const struct mt9v022_datafmt *mt9v022_find_datafmt(
94 enum v4l2_mbus_pixelcode code, const struct mt9v022_datafmt *fmt,
98 for (i = 0; i < n; i++)
99 if (fmt[i].code == code)
105 static const struct mt9v022_datafmt mt9v022_colour_fmts[] = {
107 * Order important: first natively supported,
108 * second supported with a GPIO extender
110 {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
111 {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
114 static const struct mt9v022_datafmt mt9v022_monochrome_fmts[] = {
115 /* Order important - see above */
116 {V4L2_MBUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
117 {V4L2_MBUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG},
120 /* only registers with different addresses on different mt9v02x sensors */
121 struct mt9v02x_register {
122 u8 max_total_shutter_width;
126 static const struct mt9v02x_register mt9v022_register = {
127 .max_total_shutter_width = MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
128 .pixclk_fv_lv = MT9V022_PIXCLK_FV_LV,
131 static const struct mt9v02x_register mt9v024_register = {
132 .max_total_shutter_width = MT9V024_MAX_TOTAL_SHUTTER_WIDTH,
133 .pixclk_fv_lv = MT9V024_PIXCLK_FV_LV,
137 struct v4l2_subdev subdev;
138 struct v4l2_ctrl_handler hdl;
140 /* exposure/auto-exposure cluster */
141 struct v4l2_ctrl *autoexposure;
142 struct v4l2_ctrl *exposure;
145 /* gain/auto-gain cluster */
146 struct v4l2_ctrl *autogain;
147 struct v4l2_ctrl *gain;
149 struct v4l2_ctrl *hblank;
150 struct v4l2_ctrl *vblank;
151 struct v4l2_rect rect; /* Sensor window */
152 const struct mt9v022_datafmt *fmt;
153 const struct mt9v022_datafmt *fmts;
154 const struct mt9v02x_register *reg;
156 int model; /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */
159 unsigned short y_skip_top; /* Lines to skip at the top */
162 static struct mt9v022 *to_mt9v022(const struct i2c_client *client)
164 return container_of(i2c_get_clientdata(client), struct mt9v022, subdev);
167 static int reg_read(struct i2c_client *client, const u8 reg)
169 return i2c_smbus_read_word_swapped(client, reg);
172 static int reg_write(struct i2c_client *client, const u8 reg,
175 return i2c_smbus_write_word_swapped(client, reg, data);
178 static int reg_set(struct i2c_client *client, const u8 reg,
183 ret = reg_read(client, reg);
186 return reg_write(client, reg, ret | data);
189 static int reg_clear(struct i2c_client *client, const u8 reg,
194 ret = reg_read(client, reg);
197 return reg_write(client, reg, ret & ~data);
200 static int mt9v022_init(struct i2c_client *client)
202 struct mt9v022 *mt9v022 = to_mt9v022(client);
206 * Almost the default mode: master, parallel, simultaneous, and an
207 * undocumented bit 0x200, which is present in table 7, but not in 8,
208 * plus snapshot mode to disable scan for now
210 mt9v022->chip_control |= 0x10;
211 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
213 ret = reg_write(client, MT9V022_READ_MODE, 0x300);
218 ret = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x3);
220 ret = reg_write(client, MT9V022_ANALOG_GAIN, 16);
222 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH, 480);
224 ret = reg_write(client, mt9v022->reg->max_total_shutter_width, 480);
227 ret = reg_clear(client, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
229 ret = reg_write(client, MT9V022_DIGITAL_TEST_PATTERN, 0);
231 return v4l2_ctrl_handler_setup(&mt9v022->hdl);
236 static int mt9v022_s_stream(struct v4l2_subdev *sd, int enable)
238 struct i2c_client *client = v4l2_get_subdevdata(sd);
239 struct mt9v022 *mt9v022 = to_mt9v022(client);
242 /* Switch to master "normal" mode */
243 mt9v022->chip_control &= ~0x10;
244 if (is_mt9v022_rev3(mt9v022->chip_version) ||
245 is_mt9v024(mt9v022->chip_version)) {
247 * Unset snapshot mode specific settings: clear bit 9
248 * and bit 2 in reg. 0x20 when in normal mode.
250 if (reg_clear(client, MT9V022_REG32, 0x204))
254 /* Switch to snapshot mode */
255 mt9v022->chip_control |= 0x10;
256 if (is_mt9v022_rev3(mt9v022->chip_version) ||
257 is_mt9v024(mt9v022->chip_version)) {
259 * Required settings for snapshot mode: set bit 9
260 * (RST enable) and bit 2 (CR enable) in reg. 0x20
261 * See TechNote TN0960 or TN-09-225.
263 if (reg_set(client, MT9V022_REG32, 0x204))
268 if (reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control) < 0)
273 static int mt9v022_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a)
275 struct i2c_client *client = v4l2_get_subdevdata(sd);
276 struct mt9v022 *mt9v022 = to_mt9v022(client);
277 struct v4l2_rect rect = a->c;
278 int min_row, min_blank;
281 /* Bayer format - even size lengths */
282 if (mt9v022->fmts == mt9v022_colour_fmts) {
283 rect.width = ALIGN(rect.width, 2);
284 rect.height = ALIGN(rect.height, 2);
285 /* Let the user play with the starting pixel */
288 soc_camera_limit_side(&rect.left, &rect.width,
289 MT9V022_COLUMN_SKIP, MT9V022_MIN_WIDTH, MT9V022_MAX_WIDTH);
291 soc_camera_limit_side(&rect.top, &rect.height,
292 MT9V022_ROW_SKIP, MT9V022_MIN_HEIGHT, MT9V022_MAX_HEIGHT);
294 /* Like in example app. Contradicts the datasheet though */
295 ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
297 if (ret & 1) /* Autoexposure */
298 ret = reg_write(client, mt9v022->reg->max_total_shutter_width,
299 rect.height + mt9v022->y_skip_top + 43);
301 * If autoexposure is off, there is no need to set
302 * MT9V022_TOTAL_SHUTTER_WIDTH here. Autoexposure can be off
303 * only if the user has set exposure manually, using the
304 * V4L2_CID_EXPOSURE_AUTO with the value V4L2_EXPOSURE_MANUAL.
305 * In this case the register MT9V022_TOTAL_SHUTTER_WIDTH
306 * already contains the correct value.
309 /* Setup frame format: defaults apart from width and height */
311 ret = reg_write(client, MT9V022_COLUMN_START, rect.left);
313 ret = reg_write(client, MT9V022_ROW_START, rect.top);
315 * mt9v022: min total row time is 660 columns, min blanking is 43
316 * mt9v024: min total row time is 690 columns, min blanking is 61
318 if (is_mt9v024(mt9v022->chip_version)) {
326 ret = v4l2_ctrl_s_ctrl(mt9v022->hblank,
327 rect.width > min_row - min_blank ?
328 min_blank : min_row - rect.width);
330 ret = v4l2_ctrl_s_ctrl(mt9v022->vblank, 45);
332 ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect.width);
334 ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
335 rect.height + mt9v022->y_skip_top);
340 dev_dbg(&client->dev, "Frame %dx%d pixel\n", rect.width, rect.height);
342 mt9v022->rect = rect;
347 static int mt9v022_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
349 struct i2c_client *client = v4l2_get_subdevdata(sd);
350 struct mt9v022 *mt9v022 = to_mt9v022(client);
352 a->c = mt9v022->rect;
353 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
358 static int mt9v022_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
360 a->bounds.left = MT9V022_COLUMN_SKIP;
361 a->bounds.top = MT9V022_ROW_SKIP;
362 a->bounds.width = MT9V022_MAX_WIDTH;
363 a->bounds.height = MT9V022_MAX_HEIGHT;
364 a->defrect = a->bounds;
365 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
366 a->pixelaspect.numerator = 1;
367 a->pixelaspect.denominator = 1;
372 static int mt9v022_g_fmt(struct v4l2_subdev *sd,
373 struct v4l2_mbus_framefmt *mf)
375 struct i2c_client *client = v4l2_get_subdevdata(sd);
376 struct mt9v022 *mt9v022 = to_mt9v022(client);
378 mf->width = mt9v022->rect.width;
379 mf->height = mt9v022->rect.height;
380 mf->code = mt9v022->fmt->code;
381 mf->colorspace = mt9v022->fmt->colorspace;
382 mf->field = V4L2_FIELD_NONE;
387 static int mt9v022_s_fmt(struct v4l2_subdev *sd,
388 struct v4l2_mbus_framefmt *mf)
390 struct i2c_client *client = v4l2_get_subdevdata(sd);
391 struct mt9v022 *mt9v022 = to_mt9v022(client);
392 struct v4l2_crop a = {
394 .left = mt9v022->rect.left,
395 .top = mt9v022->rect.top,
397 .height = mf->height,
403 * The caller provides a supported format, as verified per call to
404 * .try_mbus_fmt(), datawidth is from our supported format list
407 case V4L2_MBUS_FMT_Y8_1X8:
408 case V4L2_MBUS_FMT_Y10_1X10:
409 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM)
412 case V4L2_MBUS_FMT_SBGGR8_1X8:
413 case V4L2_MBUS_FMT_SBGGR10_1X10:
414 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC)
421 /* No support for scaling on this camera, just crop. */
422 ret = mt9v022_s_crop(sd, &a);
424 mf->width = mt9v022->rect.width;
425 mf->height = mt9v022->rect.height;
426 mt9v022->fmt = mt9v022_find_datafmt(mf->code,
427 mt9v022->fmts, mt9v022->num_fmts);
428 mf->colorspace = mt9v022->fmt->colorspace;
434 static int mt9v022_try_fmt(struct v4l2_subdev *sd,
435 struct v4l2_mbus_framefmt *mf)
437 struct i2c_client *client = v4l2_get_subdevdata(sd);
438 struct mt9v022 *mt9v022 = to_mt9v022(client);
439 const struct mt9v022_datafmt *fmt;
440 int align = mf->code == V4L2_MBUS_FMT_SBGGR8_1X8 ||
441 mf->code == V4L2_MBUS_FMT_SBGGR10_1X10;
443 v4l_bound_align_image(&mf->width, MT9V022_MIN_WIDTH,
444 MT9V022_MAX_WIDTH, align,
445 &mf->height, MT9V022_MIN_HEIGHT + mt9v022->y_skip_top,
446 MT9V022_MAX_HEIGHT + mt9v022->y_skip_top, align, 0);
448 fmt = mt9v022_find_datafmt(mf->code, mt9v022->fmts,
452 mf->code = fmt->code;
455 mf->colorspace = fmt->colorspace;
460 static int mt9v022_g_chip_ident(struct v4l2_subdev *sd,
461 struct v4l2_dbg_chip_ident *id)
463 struct i2c_client *client = v4l2_get_subdevdata(sd);
464 struct mt9v022 *mt9v022 = to_mt9v022(client);
466 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
469 if (id->match.addr != client->addr)
472 id->ident = mt9v022->model;
478 #ifdef CONFIG_VIDEO_ADV_DEBUG
479 static int mt9v022_g_register(struct v4l2_subdev *sd,
480 struct v4l2_dbg_register *reg)
482 struct i2c_client *client = v4l2_get_subdevdata(sd);
484 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
487 if (reg->match.addr != client->addr)
491 reg->val = reg_read(client, reg->reg);
493 if (reg->val > 0xffff)
499 static int mt9v022_s_register(struct v4l2_subdev *sd,
500 const struct v4l2_dbg_register *reg)
502 struct i2c_client *client = v4l2_get_subdevdata(sd);
504 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
507 if (reg->match.addr != client->addr)
510 if (reg_write(client, reg->reg, reg->val) < 0)
517 static int mt9v022_s_power(struct v4l2_subdev *sd, int on)
519 struct i2c_client *client = v4l2_get_subdevdata(sd);
520 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
522 return soc_camera_set_power(&client->dev, ssdd, on);
525 static int mt9v022_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
527 struct mt9v022 *mt9v022 = container_of(ctrl->handler,
528 struct mt9v022, hdl);
529 struct v4l2_subdev *sd = &mt9v022->subdev;
530 struct i2c_client *client = v4l2_get_subdevdata(sd);
531 struct v4l2_ctrl *gain = mt9v022->gain;
532 struct v4l2_ctrl *exp = mt9v022->exposure;
537 case V4L2_CID_AUTOGAIN:
538 data = reg_read(client, MT9V022_ANALOG_GAIN);
542 range = gain->maximum - gain->minimum;
543 gain->val = ((data - 16) * range + 24) / 48 + gain->minimum;
545 case V4L2_CID_EXPOSURE_AUTO:
546 data = reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH);
550 range = exp->maximum - exp->minimum;
551 exp->val = ((data - 1) * range + 239) / 479 + exp->minimum;
553 case V4L2_CID_HBLANK:
554 data = reg_read(client, MT9V022_HORIZONTAL_BLANKING);
559 case V4L2_CID_VBLANK:
560 data = reg_read(client, MT9V022_VERTICAL_BLANKING);
569 static int mt9v022_s_ctrl(struct v4l2_ctrl *ctrl)
571 struct mt9v022 *mt9v022 = container_of(ctrl->handler,
572 struct mt9v022, hdl);
573 struct v4l2_subdev *sd = &mt9v022->subdev;
574 struct i2c_client *client = v4l2_get_subdevdata(sd);
580 data = reg_set(client, MT9V022_READ_MODE, 0x10);
582 data = reg_clear(client, MT9V022_READ_MODE, 0x10);
588 data = reg_set(client, MT9V022_READ_MODE, 0x20);
590 data = reg_clear(client, MT9V022_READ_MODE, 0x20);
594 case V4L2_CID_AUTOGAIN:
596 if (reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
599 struct v4l2_ctrl *gain = mt9v022->gain;
600 /* mt9v022 has minimum == default */
601 unsigned long range = gain->maximum - gain->minimum;
602 /* Valid values 16 to 64, 32 to 64 must be even. */
603 unsigned long gain_val = ((gain->val - gain->minimum) *
604 48 + range / 2) / range + 16;
610 * The user wants to set gain manually, hope, she
611 * knows, what she's doing... Switch AGC off.
613 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
616 dev_dbg(&client->dev, "Setting gain from %d to %lu\n",
617 reg_read(client, MT9V022_ANALOG_GAIN), gain_val);
618 if (reg_write(client, MT9V022_ANALOG_GAIN, gain_val) < 0)
622 case V4L2_CID_EXPOSURE_AUTO:
623 if (ctrl->val == V4L2_EXPOSURE_AUTO) {
624 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
626 struct v4l2_ctrl *exp = mt9v022->exposure;
627 unsigned long range = exp->maximum - exp->minimum;
628 unsigned long shutter = ((exp->val - exp->minimum) *
629 479 + range / 2) / range + 1;
632 * The user wants to set shutter width manually, hope,
633 * she knows, what she's doing... Switch AEC off.
635 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
638 dev_dbg(&client->dev, "Shutter width from %d to %lu\n",
639 reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
641 if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
646 case V4L2_CID_HBLANK:
647 if (reg_write(client, MT9V022_HORIZONTAL_BLANKING,
651 case V4L2_CID_VBLANK:
652 if (reg_write(client, MT9V022_VERTICAL_BLANKING,
661 * Interface active, can use i2c. If it fails, it can indeed mean, that
662 * this wasn't our capture interface, so, we wait for the right one
664 static int mt9v022_video_probe(struct i2c_client *client)
666 struct mt9v022 *mt9v022 = to_mt9v022(client);
667 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
672 ret = mt9v022_s_power(&mt9v022->subdev, 1);
676 /* Read out the chip version register */
677 data = reg_read(client, MT9V022_CHIP_VERSION);
679 /* must be 0x1311, 0x1313 or 0x1324 */
680 if (data != 0x1311 && data != 0x1313 && data != 0x1324) {
682 dev_info(&client->dev, "No MT9V022 found, ID register 0x%x\n",
687 mt9v022->chip_version = data;
689 mt9v022->reg = is_mt9v024(data) ? &mt9v024_register :
693 ret = reg_write(client, MT9V022_RESET, 1);
696 /* 15 clock cycles */
698 if (reg_read(client, MT9V022_RESET)) {
699 dev_err(&client->dev, "Resetting MT9V022 failed!\n");
705 /* Set monochrome or colour sensor type */
706 if (sensor_type && (!strcmp("colour", sensor_type) ||
707 !strcmp("color", sensor_type))) {
708 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
709 mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
710 mt9v022->fmts = mt9v022_colour_fmts;
712 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
713 mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
714 mt9v022->fmts = mt9v022_monochrome_fmts;
720 mt9v022->num_fmts = 0;
723 * This is a 10bit sensor, so by default we only allow 10bit.
724 * The platform may support different bus widths due to
725 * different routing of the data lines.
727 if (ssdd->query_bus_param)
728 flags = ssdd->query_bus_param(ssdd);
730 flags = SOCAM_DATAWIDTH_10;
732 if (flags & SOCAM_DATAWIDTH_10)
737 if (flags & SOCAM_DATAWIDTH_8)
740 mt9v022->fmt = &mt9v022->fmts[0];
742 dev_info(&client->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
743 data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
744 "monochrome" : "colour");
746 ret = mt9v022_init(client);
748 dev_err(&client->dev, "Failed to initialise the camera\n");
751 mt9v022_s_power(&mt9v022->subdev, 0);
755 static int mt9v022_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
757 struct i2c_client *client = v4l2_get_subdevdata(sd);
758 struct mt9v022 *mt9v022 = to_mt9v022(client);
760 *lines = mt9v022->y_skip_top;
765 static const struct v4l2_ctrl_ops mt9v022_ctrl_ops = {
766 .g_volatile_ctrl = mt9v022_g_volatile_ctrl,
767 .s_ctrl = mt9v022_s_ctrl,
770 static struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
771 .g_chip_ident = mt9v022_g_chip_ident,
772 #ifdef CONFIG_VIDEO_ADV_DEBUG
773 .g_register = mt9v022_g_register,
774 .s_register = mt9v022_s_register,
776 .s_power = mt9v022_s_power,
779 static int mt9v022_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
780 enum v4l2_mbus_pixelcode *code)
782 struct i2c_client *client = v4l2_get_subdevdata(sd);
783 struct mt9v022 *mt9v022 = to_mt9v022(client);
785 if (index >= mt9v022->num_fmts)
788 *code = mt9v022->fmts[index].code;
792 static int mt9v022_g_mbus_config(struct v4l2_subdev *sd,
793 struct v4l2_mbus_config *cfg)
795 struct i2c_client *client = v4l2_get_subdevdata(sd);
796 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
798 cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_SLAVE |
799 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
800 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
801 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
802 V4L2_MBUS_DATA_ACTIVE_HIGH;
803 cfg->type = V4L2_MBUS_PARALLEL;
804 cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
809 static int mt9v022_s_mbus_config(struct v4l2_subdev *sd,
810 const struct v4l2_mbus_config *cfg)
812 struct i2c_client *client = v4l2_get_subdevdata(sd);
813 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
814 struct mt9v022 *mt9v022 = to_mt9v022(client);
815 unsigned long flags = soc_camera_apply_board_flags(ssdd, cfg);
816 unsigned int bps = soc_mbus_get_fmtdesc(mt9v022->fmt->code)->bits_per_sample;
820 if (ssdd->set_bus_param) {
821 ret = ssdd->set_bus_param(ssdd, 1 << (bps - 1));
824 } else if (bps != 10) {
826 * Without board specific bus width settings we only support the
827 * sensors native bus width
832 if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
835 if (!(flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH))
838 if (!(flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH))
841 ret = reg_write(client, mt9v022->reg->pixclk_fv_lv, pixclk);
845 if (!(flags & V4L2_MBUS_MASTER))
846 mt9v022->chip_control &= ~0x8;
848 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
852 dev_dbg(&client->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
853 pixclk, mt9v022->chip_control);
858 static struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
859 .s_stream = mt9v022_s_stream,
860 .s_mbus_fmt = mt9v022_s_fmt,
861 .g_mbus_fmt = mt9v022_g_fmt,
862 .try_mbus_fmt = mt9v022_try_fmt,
863 .s_crop = mt9v022_s_crop,
864 .g_crop = mt9v022_g_crop,
865 .cropcap = mt9v022_cropcap,
866 .enum_mbus_fmt = mt9v022_enum_fmt,
867 .g_mbus_config = mt9v022_g_mbus_config,
868 .s_mbus_config = mt9v022_s_mbus_config,
871 static struct v4l2_subdev_sensor_ops mt9v022_subdev_sensor_ops = {
872 .g_skip_top_lines = mt9v022_g_skip_top_lines,
875 static struct v4l2_subdev_ops mt9v022_subdev_ops = {
876 .core = &mt9v022_subdev_core_ops,
877 .video = &mt9v022_subdev_video_ops,
878 .sensor = &mt9v022_subdev_sensor_ops,
881 static int mt9v022_probe(struct i2c_client *client,
882 const struct i2c_device_id *did)
884 struct mt9v022 *mt9v022;
885 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
886 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
887 struct mt9v022_platform_data *pdata;
891 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
895 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
896 dev_warn(&adapter->dev,
897 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
901 mt9v022 = devm_kzalloc(&client->dev, sizeof(struct mt9v022), GFP_KERNEL);
905 pdata = ssdd->drv_priv;
906 v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
907 v4l2_ctrl_handler_init(&mt9v022->hdl, 6);
908 v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
909 V4L2_CID_VFLIP, 0, 1, 1, 0);
910 v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
911 V4L2_CID_HFLIP, 0, 1, 1, 0);
912 mt9v022->autogain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
913 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
914 mt9v022->gain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
915 V4L2_CID_GAIN, 0, 127, 1, 64);
918 * Simulated autoexposure. If enabled, we calculate shutter width
919 * ourselves in the driver based on vertical blanking and frame width
921 mt9v022->autoexposure = v4l2_ctrl_new_std_menu(&mt9v022->hdl,
922 &mt9v022_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
924 mt9v022->exposure = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
925 V4L2_CID_EXPOSURE, 1, 255, 1, 255);
927 mt9v022->hblank = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
928 V4L2_CID_HBLANK, MT9V022_HORIZONTAL_BLANKING_MIN,
929 MT9V022_HORIZONTAL_BLANKING_MAX, 1,
930 MT9V022_HORIZONTAL_BLANKING_DEF);
932 mt9v022->vblank = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
933 V4L2_CID_VBLANK, MT9V022_VERTICAL_BLANKING_MIN,
934 MT9V022_VERTICAL_BLANKING_MAX, 1,
935 MT9V022_VERTICAL_BLANKING_DEF);
937 mt9v022->subdev.ctrl_handler = &mt9v022->hdl;
938 if (mt9v022->hdl.error) {
939 int err = mt9v022->hdl.error;
941 dev_err(&client->dev, "control initialisation err %d\n", err);
944 v4l2_ctrl_auto_cluster(2, &mt9v022->autoexposure,
945 V4L2_EXPOSURE_MANUAL, true);
946 v4l2_ctrl_auto_cluster(2, &mt9v022->autogain, 0, true);
948 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
951 * On some platforms the first read out line is corrupted.
952 * Workaround it by skipping if indicated by platform data.
954 mt9v022->y_skip_top = pdata ? pdata->y_skip_top : 0;
955 mt9v022->rect.left = MT9V022_COLUMN_SKIP;
956 mt9v022->rect.top = MT9V022_ROW_SKIP;
957 mt9v022->rect.width = MT9V022_MAX_WIDTH;
958 mt9v022->rect.height = MT9V022_MAX_HEIGHT;
960 ret = mt9v022_video_probe(client);
962 v4l2_ctrl_handler_free(&mt9v022->hdl);
967 static int mt9v022_remove(struct i2c_client *client)
969 struct mt9v022 *mt9v022 = to_mt9v022(client);
970 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
972 v4l2_device_unregister_subdev(&mt9v022->subdev);
974 ssdd->free_bus(ssdd);
975 v4l2_ctrl_handler_free(&mt9v022->hdl);
979 static const struct i2c_device_id mt9v022_id[] = {
983 MODULE_DEVICE_TABLE(i2c, mt9v022_id);
985 static struct i2c_driver mt9v022_i2c_driver = {
989 .probe = mt9v022_probe,
990 .remove = mt9v022_remove,
991 .id_table = mt9v022_id,
994 module_i2c_driver(mt9v022_i2c_driver);
996 MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
997 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
998 MODULE_LICENSE("GPL");