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/soc_camera.h>
19 #include <media/soc_mediabus.h>
20 #include <media/v4l2-subdev.h>
21 #include <media/v4l2-chip-ident.h>
22 #include <media/v4l2-ctrls.h>
25 * mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
26 * The platform has to define struct i2c_board_info objects and link to them
27 * from struct soc_camera_link
30 static char *sensor_type;
31 module_param(sensor_type, charp, S_IRUGO);
32 MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"");
34 /* mt9v022 selected register addresses */
35 #define MT9V022_CHIP_VERSION 0x00
36 #define MT9V022_COLUMN_START 0x01
37 #define MT9V022_ROW_START 0x02
38 #define MT9V022_WINDOW_HEIGHT 0x03
39 #define MT9V022_WINDOW_WIDTH 0x04
40 #define MT9V022_HORIZONTAL_BLANKING 0x05
41 #define MT9V022_VERTICAL_BLANKING 0x06
42 #define MT9V022_CHIP_CONTROL 0x07
43 #define MT9V022_SHUTTER_WIDTH1 0x08
44 #define MT9V022_SHUTTER_WIDTH2 0x09
45 #define MT9V022_SHUTTER_WIDTH_CTRL 0x0a
46 #define MT9V022_TOTAL_SHUTTER_WIDTH 0x0b
47 #define MT9V022_RESET 0x0c
48 #define MT9V022_READ_MODE 0x0d
49 #define MT9V022_MONITOR_MODE 0x0e
50 #define MT9V022_PIXEL_OPERATION_MODE 0x0f
51 #define MT9V022_LED_OUT_CONTROL 0x1b
52 #define MT9V022_ADC_MODE_CONTROL 0x1c
53 #define MT9V022_ANALOG_GAIN 0x35
54 #define MT9V022_BLACK_LEVEL_CALIB_CTRL 0x47
55 #define MT9V022_PIXCLK_FV_LV 0x74
56 #define MT9V022_DIGITAL_TEST_PATTERN 0x7f
57 #define MT9V022_AEC_AGC_ENABLE 0xAF
58 #define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD
60 /* mt9v024 partial list register addresses changes with respect to mt9v022 */
61 #define MT9V024_PIXCLK_FV_LV 0x72
62 #define MT9V024_MAX_TOTAL_SHUTTER_WIDTH 0xAD
64 /* Progressive scan, master, defaults */
65 #define MT9V022_CHIP_CONTROL_DEFAULT 0x188
67 #define MT9V022_MAX_WIDTH 752
68 #define MT9V022_MAX_HEIGHT 480
69 #define MT9V022_MIN_WIDTH 48
70 #define MT9V022_MIN_HEIGHT 32
71 #define MT9V022_COLUMN_SKIP 1
72 #define MT9V022_ROW_SKIP 4
74 #define is_mt9v024(id) (id == 0x1324)
76 /* MT9V022 has only one fixed colorspace per pixelcode */
77 struct mt9v022_datafmt {
78 enum v4l2_mbus_pixelcode code;
79 enum v4l2_colorspace colorspace;
82 /* Find a data format by a pixel code in an array */
83 static const struct mt9v022_datafmt *mt9v022_find_datafmt(
84 enum v4l2_mbus_pixelcode code, const struct mt9v022_datafmt *fmt,
88 for (i = 0; i < n; i++)
89 if (fmt[i].code == code)
95 static const struct mt9v022_datafmt mt9v022_colour_fmts[] = {
97 * Order important: first natively supported,
98 * second supported with a GPIO extender
100 {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
101 {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
104 static const struct mt9v022_datafmt mt9v022_monochrome_fmts[] = {
105 /* Order important - see above */
106 {V4L2_MBUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
107 {V4L2_MBUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG},
110 /* only registers with different addresses on different mt9v02x sensors */
111 struct mt9v02x_register {
112 u8 max_total_shutter_width;
116 static const struct mt9v02x_register mt9v022_register = {
117 .max_total_shutter_width = MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
118 .pixclk_fv_lv = MT9V022_PIXCLK_FV_LV,
121 static const struct mt9v02x_register mt9v024_register = {
122 .max_total_shutter_width = MT9V024_MAX_TOTAL_SHUTTER_WIDTH,
123 .pixclk_fv_lv = MT9V024_PIXCLK_FV_LV,
127 struct v4l2_subdev subdev;
128 struct v4l2_ctrl_handler hdl;
130 /* exposure/auto-exposure cluster */
131 struct v4l2_ctrl *autoexposure;
132 struct v4l2_ctrl *exposure;
135 /* gain/auto-gain cluster */
136 struct v4l2_ctrl *autogain;
137 struct v4l2_ctrl *gain;
139 struct v4l2_rect rect; /* Sensor window */
140 const struct mt9v022_datafmt *fmt;
141 const struct mt9v022_datafmt *fmts;
142 const struct mt9v02x_register *reg;
144 int model; /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */
146 unsigned short y_skip_top; /* Lines to skip at the top */
149 static struct mt9v022 *to_mt9v022(const struct i2c_client *client)
151 return container_of(i2c_get_clientdata(client), struct mt9v022, subdev);
154 static int reg_read(struct i2c_client *client, const u8 reg)
156 return i2c_smbus_read_word_swapped(client, reg);
159 static int reg_write(struct i2c_client *client, const u8 reg,
162 return i2c_smbus_write_word_swapped(client, reg, data);
165 static int reg_set(struct i2c_client *client, const u8 reg,
170 ret = reg_read(client, reg);
173 return reg_write(client, reg, ret | data);
176 static int reg_clear(struct i2c_client *client, const u8 reg,
181 ret = reg_read(client, reg);
184 return reg_write(client, reg, ret & ~data);
187 static int mt9v022_init(struct i2c_client *client)
189 struct mt9v022 *mt9v022 = to_mt9v022(client);
193 * Almost the default mode: master, parallel, simultaneous, and an
194 * undocumented bit 0x200, which is present in table 7, but not in 8,
195 * plus snapshot mode to disable scan for now
197 mt9v022->chip_control |= 0x10;
198 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
200 ret = reg_write(client, MT9V022_READ_MODE, 0x300);
205 ret = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x3);
207 ret = reg_write(client, MT9V022_ANALOG_GAIN, 16);
209 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH, 480);
211 ret = reg_write(client, mt9v022->reg->max_total_shutter_width, 480);
214 ret = reg_clear(client, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
216 ret = reg_write(client, MT9V022_DIGITAL_TEST_PATTERN, 0);
218 return v4l2_ctrl_handler_setup(&mt9v022->hdl);
223 static int mt9v022_s_stream(struct v4l2_subdev *sd, int enable)
225 struct i2c_client *client = v4l2_get_subdevdata(sd);
226 struct mt9v022 *mt9v022 = to_mt9v022(client);
229 /* Switch to master "normal" mode */
230 mt9v022->chip_control &= ~0x10;
232 /* Switch to snapshot mode */
233 mt9v022->chip_control |= 0x10;
235 if (reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control) < 0)
240 static int mt9v022_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a)
242 struct i2c_client *client = v4l2_get_subdevdata(sd);
243 struct mt9v022 *mt9v022 = to_mt9v022(client);
244 struct v4l2_rect rect = a->c;
247 /* Bayer format - even size lengths */
248 if (mt9v022->fmts == mt9v022_colour_fmts) {
249 rect.width = ALIGN(rect.width, 2);
250 rect.height = ALIGN(rect.height, 2);
251 /* Let the user play with the starting pixel */
254 soc_camera_limit_side(&rect.left, &rect.width,
255 MT9V022_COLUMN_SKIP, MT9V022_MIN_WIDTH, MT9V022_MAX_WIDTH);
257 soc_camera_limit_side(&rect.top, &rect.height,
258 MT9V022_ROW_SKIP, MT9V022_MIN_HEIGHT, MT9V022_MAX_HEIGHT);
260 /* Like in example app. Contradicts the datasheet though */
261 ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
263 if (ret & 1) /* Autoexposure */
264 ret = reg_write(client, mt9v022->reg->max_total_shutter_width,
265 rect.height + mt9v022->y_skip_top + 43);
267 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
268 rect.height + mt9v022->y_skip_top + 43);
270 /* Setup frame format: defaults apart from width and height */
272 ret = reg_write(client, MT9V022_COLUMN_START, rect.left);
274 ret = reg_write(client, MT9V022_ROW_START, rect.top);
277 * Default 94, Phytec driver says:
278 * "width + horizontal blank >= 660"
280 ret = reg_write(client, MT9V022_HORIZONTAL_BLANKING,
281 rect.width > 660 - 43 ? 43 :
284 ret = reg_write(client, MT9V022_VERTICAL_BLANKING, 45);
286 ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect.width);
288 ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
289 rect.height + mt9v022->y_skip_top);
294 dev_dbg(&client->dev, "Frame %dx%d pixel\n", rect.width, rect.height);
296 mt9v022->rect = rect;
301 static int mt9v022_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
303 struct i2c_client *client = v4l2_get_subdevdata(sd);
304 struct mt9v022 *mt9v022 = to_mt9v022(client);
306 a->c = mt9v022->rect;
307 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
312 static int mt9v022_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
314 a->bounds.left = MT9V022_COLUMN_SKIP;
315 a->bounds.top = MT9V022_ROW_SKIP;
316 a->bounds.width = MT9V022_MAX_WIDTH;
317 a->bounds.height = MT9V022_MAX_HEIGHT;
318 a->defrect = a->bounds;
319 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
320 a->pixelaspect.numerator = 1;
321 a->pixelaspect.denominator = 1;
326 static int mt9v022_g_fmt(struct v4l2_subdev *sd,
327 struct v4l2_mbus_framefmt *mf)
329 struct i2c_client *client = v4l2_get_subdevdata(sd);
330 struct mt9v022 *mt9v022 = to_mt9v022(client);
332 mf->width = mt9v022->rect.width;
333 mf->height = mt9v022->rect.height;
334 mf->code = mt9v022->fmt->code;
335 mf->colorspace = mt9v022->fmt->colorspace;
336 mf->field = V4L2_FIELD_NONE;
341 static int mt9v022_s_fmt(struct v4l2_subdev *sd,
342 struct v4l2_mbus_framefmt *mf)
344 struct i2c_client *client = v4l2_get_subdevdata(sd);
345 struct mt9v022 *mt9v022 = to_mt9v022(client);
346 struct v4l2_crop a = {
348 .left = mt9v022->rect.left,
349 .top = mt9v022->rect.top,
351 .height = mf->height,
357 * The caller provides a supported format, as verified per call to
358 * .try_mbus_fmt(), datawidth is from our supported format list
361 case V4L2_MBUS_FMT_Y8_1X8:
362 case V4L2_MBUS_FMT_Y10_1X10:
363 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM)
366 case V4L2_MBUS_FMT_SBGGR8_1X8:
367 case V4L2_MBUS_FMT_SBGGR10_1X10:
368 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC)
375 /* No support for scaling on this camera, just crop. */
376 ret = mt9v022_s_crop(sd, &a);
378 mf->width = mt9v022->rect.width;
379 mf->height = mt9v022->rect.height;
380 mt9v022->fmt = mt9v022_find_datafmt(mf->code,
381 mt9v022->fmts, mt9v022->num_fmts);
382 mf->colorspace = mt9v022->fmt->colorspace;
388 static int mt9v022_try_fmt(struct v4l2_subdev *sd,
389 struct v4l2_mbus_framefmt *mf)
391 struct i2c_client *client = v4l2_get_subdevdata(sd);
392 struct mt9v022 *mt9v022 = to_mt9v022(client);
393 const struct mt9v022_datafmt *fmt;
394 int align = mf->code == V4L2_MBUS_FMT_SBGGR8_1X8 ||
395 mf->code == V4L2_MBUS_FMT_SBGGR10_1X10;
397 v4l_bound_align_image(&mf->width, MT9V022_MIN_WIDTH,
398 MT9V022_MAX_WIDTH, align,
399 &mf->height, MT9V022_MIN_HEIGHT + mt9v022->y_skip_top,
400 MT9V022_MAX_HEIGHT + mt9v022->y_skip_top, align, 0);
402 fmt = mt9v022_find_datafmt(mf->code, mt9v022->fmts,
406 mf->code = fmt->code;
409 mf->colorspace = fmt->colorspace;
414 static int mt9v022_g_chip_ident(struct v4l2_subdev *sd,
415 struct v4l2_dbg_chip_ident *id)
417 struct i2c_client *client = v4l2_get_subdevdata(sd);
418 struct mt9v022 *mt9v022 = to_mt9v022(client);
420 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
423 if (id->match.addr != client->addr)
426 id->ident = mt9v022->model;
432 #ifdef CONFIG_VIDEO_ADV_DEBUG
433 static int mt9v022_g_register(struct v4l2_subdev *sd,
434 struct v4l2_dbg_register *reg)
436 struct i2c_client *client = v4l2_get_subdevdata(sd);
438 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
441 if (reg->match.addr != client->addr)
445 reg->val = reg_read(client, reg->reg);
447 if (reg->val > 0xffff)
453 static int mt9v022_s_register(struct v4l2_subdev *sd,
454 struct v4l2_dbg_register *reg)
456 struct i2c_client *client = v4l2_get_subdevdata(sd);
458 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
461 if (reg->match.addr != client->addr)
464 if (reg_write(client, reg->reg, reg->val) < 0)
471 static int mt9v022_s_power(struct v4l2_subdev *sd, int on)
473 struct i2c_client *client = v4l2_get_subdevdata(sd);
474 struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
476 return soc_camera_set_power(&client->dev, icl, on);
479 static int mt9v022_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
481 struct mt9v022 *mt9v022 = container_of(ctrl->handler,
482 struct mt9v022, hdl);
483 struct v4l2_subdev *sd = &mt9v022->subdev;
484 struct i2c_client *client = v4l2_get_subdevdata(sd);
485 struct v4l2_ctrl *gain = mt9v022->gain;
486 struct v4l2_ctrl *exp = mt9v022->exposure;
491 case V4L2_CID_AUTOGAIN:
492 data = reg_read(client, MT9V022_ANALOG_GAIN);
496 range = gain->maximum - gain->minimum;
497 gain->val = ((data - 16) * range + 24) / 48 + gain->minimum;
499 case V4L2_CID_EXPOSURE_AUTO:
500 data = reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH);
504 range = exp->maximum - exp->minimum;
505 exp->val = ((data - 1) * range + 239) / 479 + exp->minimum;
511 static int mt9v022_s_ctrl(struct v4l2_ctrl *ctrl)
513 struct mt9v022 *mt9v022 = container_of(ctrl->handler,
514 struct mt9v022, hdl);
515 struct v4l2_subdev *sd = &mt9v022->subdev;
516 struct i2c_client *client = v4l2_get_subdevdata(sd);
522 data = reg_set(client, MT9V022_READ_MODE, 0x10);
524 data = reg_clear(client, MT9V022_READ_MODE, 0x10);
530 data = reg_set(client, MT9V022_READ_MODE, 0x20);
532 data = reg_clear(client, MT9V022_READ_MODE, 0x20);
536 case V4L2_CID_AUTOGAIN:
538 if (reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
541 struct v4l2_ctrl *gain = mt9v022->gain;
542 /* mt9v022 has minimum == default */
543 unsigned long range = gain->maximum - gain->minimum;
544 /* Valid values 16 to 64, 32 to 64 must be even. */
545 unsigned long gain_val = ((gain->val - gain->minimum) *
546 48 + range / 2) / range + 16;
552 * The user wants to set gain manually, hope, she
553 * knows, what she's doing... Switch AGC off.
555 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
558 dev_dbg(&client->dev, "Setting gain from %d to %lu\n",
559 reg_read(client, MT9V022_ANALOG_GAIN), gain_val);
560 if (reg_write(client, MT9V022_ANALOG_GAIN, gain_val) < 0)
564 case V4L2_CID_EXPOSURE_AUTO:
565 if (ctrl->val == V4L2_EXPOSURE_AUTO) {
566 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
568 struct v4l2_ctrl *exp = mt9v022->exposure;
569 unsigned long range = exp->maximum - exp->minimum;
570 unsigned long shutter = ((exp->val - exp->minimum) *
571 479 + range / 2) / range + 1;
574 * The user wants to set shutter width manually, hope,
575 * she knows, what she's doing... Switch AEC off.
577 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
580 dev_dbg(&client->dev, "Shutter width from %d to %lu\n",
581 reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
583 if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
593 * Interface active, can use i2c. If it fails, it can indeed mean, that
594 * this wasn't our capture interface, so, we wait for the right one
596 static int mt9v022_video_probe(struct i2c_client *client)
598 struct mt9v022 *mt9v022 = to_mt9v022(client);
599 struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
604 ret = mt9v022_s_power(&mt9v022->subdev, 1);
608 /* Read out the chip version register */
609 data = reg_read(client, MT9V022_CHIP_VERSION);
611 /* must be 0x1311, 0x1313 or 0x1324 */
612 if (data != 0x1311 && data != 0x1313 && data != 0x1324) {
614 dev_info(&client->dev, "No MT9V022 found, ID register 0x%x\n",
619 mt9v022->reg = is_mt9v024(data) ? &mt9v024_register :
623 ret = reg_write(client, MT9V022_RESET, 1);
626 /* 15 clock cycles */
628 if (reg_read(client, MT9V022_RESET)) {
629 dev_err(&client->dev, "Resetting MT9V022 failed!\n");
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 mt9v022->fmts = mt9v022_colour_fmts;
642 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
643 mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
644 mt9v022->fmts = mt9v022_monochrome_fmts;
650 mt9v022->num_fmts = 0;
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.
657 if (icl->query_bus_param)
658 flags = icl->query_bus_param(icl);
660 flags = SOCAM_DATAWIDTH_10;
662 if (flags & SOCAM_DATAWIDTH_10)
667 if (flags & SOCAM_DATAWIDTH_8)
670 mt9v022->fmt = &mt9v022->fmts[0];
672 dev_info(&client->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
673 data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
674 "monochrome" : "colour");
676 ret = mt9v022_init(client);
678 dev_err(&client->dev, "Failed to initialise the camera\n");
681 mt9v022_s_power(&mt9v022->subdev, 0);
685 static int mt9v022_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
687 struct i2c_client *client = v4l2_get_subdevdata(sd);
688 struct mt9v022 *mt9v022 = to_mt9v022(client);
690 *lines = mt9v022->y_skip_top;
695 static const struct v4l2_ctrl_ops mt9v022_ctrl_ops = {
696 .g_volatile_ctrl = mt9v022_g_volatile_ctrl,
697 .s_ctrl = mt9v022_s_ctrl,
700 static struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
701 .g_chip_ident = mt9v022_g_chip_ident,
702 #ifdef CONFIG_VIDEO_ADV_DEBUG
703 .g_register = mt9v022_g_register,
704 .s_register = mt9v022_s_register,
706 .s_power = mt9v022_s_power,
709 static int mt9v022_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
710 enum v4l2_mbus_pixelcode *code)
712 struct i2c_client *client = v4l2_get_subdevdata(sd);
713 struct mt9v022 *mt9v022 = to_mt9v022(client);
715 if (index >= mt9v022->num_fmts)
718 *code = mt9v022->fmts[index].code;
722 static int mt9v022_g_mbus_config(struct v4l2_subdev *sd,
723 struct v4l2_mbus_config *cfg)
725 struct i2c_client *client = v4l2_get_subdevdata(sd);
726 struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
728 cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_SLAVE |
729 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
730 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
731 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
732 V4L2_MBUS_DATA_ACTIVE_HIGH;
733 cfg->type = V4L2_MBUS_PARALLEL;
734 cfg->flags = soc_camera_apply_board_flags(icl, cfg);
739 static int mt9v022_s_mbus_config(struct v4l2_subdev *sd,
740 const struct v4l2_mbus_config *cfg)
742 struct i2c_client *client = v4l2_get_subdevdata(sd);
743 struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
744 struct mt9v022 *mt9v022 = to_mt9v022(client);
745 unsigned long flags = soc_camera_apply_board_flags(icl, cfg);
746 unsigned int bps = soc_mbus_get_fmtdesc(mt9v022->fmt->code)->bits_per_sample;
750 if (icl->set_bus_param) {
751 ret = icl->set_bus_param(icl, 1 << (bps - 1));
754 } else if (bps != 10) {
756 * Without board specific bus width settings we only support the
757 * sensors native bus width
762 if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
765 if (!(flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH))
768 if (!(flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH))
771 ret = reg_write(client, mt9v022->reg->pixclk_fv_lv, pixclk);
775 if (!(flags & V4L2_MBUS_MASTER))
776 mt9v022->chip_control &= ~0x8;
778 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
782 dev_dbg(&client->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
783 pixclk, mt9v022->chip_control);
788 static struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
789 .s_stream = mt9v022_s_stream,
790 .s_mbus_fmt = mt9v022_s_fmt,
791 .g_mbus_fmt = mt9v022_g_fmt,
792 .try_mbus_fmt = mt9v022_try_fmt,
793 .s_crop = mt9v022_s_crop,
794 .g_crop = mt9v022_g_crop,
795 .cropcap = mt9v022_cropcap,
796 .enum_mbus_fmt = mt9v022_enum_fmt,
797 .g_mbus_config = mt9v022_g_mbus_config,
798 .s_mbus_config = mt9v022_s_mbus_config,
801 static struct v4l2_subdev_sensor_ops mt9v022_subdev_sensor_ops = {
802 .g_skip_top_lines = mt9v022_g_skip_top_lines,
805 static struct v4l2_subdev_ops mt9v022_subdev_ops = {
806 .core = &mt9v022_subdev_core_ops,
807 .video = &mt9v022_subdev_video_ops,
808 .sensor = &mt9v022_subdev_sensor_ops,
811 static int mt9v022_probe(struct i2c_client *client,
812 const struct i2c_device_id *did)
814 struct mt9v022 *mt9v022;
815 struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
816 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
820 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
824 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
825 dev_warn(&adapter->dev,
826 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
830 mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL);
834 v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
835 v4l2_ctrl_handler_init(&mt9v022->hdl, 6);
836 v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
837 V4L2_CID_VFLIP, 0, 1, 1, 0);
838 v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
839 V4L2_CID_HFLIP, 0, 1, 1, 0);
840 mt9v022->autogain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
841 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
842 mt9v022->gain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
843 V4L2_CID_GAIN, 0, 127, 1, 64);
846 * Simulated autoexposure. If enabled, we calculate shutter width
847 * ourselves in the driver based on vertical blanking and frame width
849 mt9v022->autoexposure = v4l2_ctrl_new_std_menu(&mt9v022->hdl,
850 &mt9v022_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
852 mt9v022->exposure = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
853 V4L2_CID_EXPOSURE, 1, 255, 1, 255);
855 mt9v022->subdev.ctrl_handler = &mt9v022->hdl;
856 if (mt9v022->hdl.error) {
857 int err = mt9v022->hdl.error;
862 v4l2_ctrl_auto_cluster(2, &mt9v022->autoexposure,
863 V4L2_EXPOSURE_MANUAL, true);
864 v4l2_ctrl_auto_cluster(2, &mt9v022->autogain, 0, true);
866 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
869 * MT9V022 _really_ corrupts the first read out line.
870 * TODO: verify on i.MX31
872 mt9v022->y_skip_top = 1;
873 mt9v022->rect.left = MT9V022_COLUMN_SKIP;
874 mt9v022->rect.top = MT9V022_ROW_SKIP;
875 mt9v022->rect.width = MT9V022_MAX_WIDTH;
876 mt9v022->rect.height = MT9V022_MAX_HEIGHT;
878 ret = mt9v022_video_probe(client);
880 v4l2_ctrl_handler_free(&mt9v022->hdl);
887 static int mt9v022_remove(struct i2c_client *client)
889 struct mt9v022 *mt9v022 = to_mt9v022(client);
890 struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
892 v4l2_device_unregister_subdev(&mt9v022->subdev);
895 v4l2_ctrl_handler_free(&mt9v022->hdl);
900 static const struct i2c_device_id mt9v022_id[] = {
904 MODULE_DEVICE_TABLE(i2c, mt9v022_id);
906 static struct i2c_driver mt9v022_i2c_driver = {
910 .probe = mt9v022_probe,
911 .remove = mt9v022_remove,
912 .id_table = mt9v022_id,
915 module_i2c_driver(mt9v022_i2c_driver);
917 MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
918 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
919 MODULE_LICENSE("GPL");