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/i2c/mt9v022.h>
19 #include <media/soc_camera.h>
20 #include <media/drv-intf/soc_mediabus.h>
21 #include <media/v4l2-subdev.h>
22 #include <media/v4l2-clk.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 {
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 u32 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 {MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
111 {MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
114 static const struct mt9v022_datafmt mt9v022_monochrome_fmts[] = {
115 /* Order important - see above */
116 {MEDIA_BUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
117 {MEDIA_BUS_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,
142 struct v4l2_subdev subdev;
143 struct v4l2_ctrl_handler hdl;
145 /* exposure/auto-exposure cluster */
146 struct v4l2_ctrl *autoexposure;
147 struct v4l2_ctrl *exposure;
150 /* gain/auto-gain cluster */
151 struct v4l2_ctrl *autogain;
152 struct v4l2_ctrl *gain;
154 struct v4l2_ctrl *hblank;
155 struct v4l2_ctrl *vblank;
156 struct v4l2_rect rect; /* Sensor window */
157 struct v4l2_clk *clk;
158 const struct mt9v022_datafmt *fmt;
159 const struct mt9v022_datafmt *fmts;
160 const struct mt9v02x_register *reg;
162 enum mt9v022_model model;
165 unsigned short y_skip_top; /* Lines to skip at the top */
168 static struct mt9v022 *to_mt9v022(const struct i2c_client *client)
170 return container_of(i2c_get_clientdata(client), struct mt9v022, subdev);
173 static int reg_read(struct i2c_client *client, const u8 reg)
175 return i2c_smbus_read_word_swapped(client, reg);
178 static int reg_write(struct i2c_client *client, const u8 reg,
181 return i2c_smbus_write_word_swapped(client, reg, data);
184 static int reg_set(struct i2c_client *client, const u8 reg,
189 ret = reg_read(client, reg);
192 return reg_write(client, reg, ret | data);
195 static int reg_clear(struct i2c_client *client, const u8 reg,
200 ret = reg_read(client, reg);
203 return reg_write(client, reg, ret & ~data);
206 static int mt9v022_init(struct i2c_client *client)
208 struct mt9v022 *mt9v022 = to_mt9v022(client);
212 * Almost the default mode: master, parallel, simultaneous, and an
213 * undocumented bit 0x200, which is present in table 7, but not in 8,
214 * plus snapshot mode to disable scan for now
216 mt9v022->chip_control |= 0x10;
217 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
219 ret = reg_write(client, MT9V022_READ_MODE, 0x300);
224 ret = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x3);
226 ret = reg_write(client, MT9V022_ANALOG_GAIN, 16);
228 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH, 480);
230 ret = reg_write(client, mt9v022->reg->max_total_shutter_width, 480);
233 ret = reg_clear(client, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
235 ret = reg_write(client, MT9V022_DIGITAL_TEST_PATTERN, 0);
237 return v4l2_ctrl_handler_setup(&mt9v022->hdl);
242 static int mt9v022_s_stream(struct v4l2_subdev *sd, int enable)
244 struct i2c_client *client = v4l2_get_subdevdata(sd);
245 struct mt9v022 *mt9v022 = to_mt9v022(client);
248 /* Switch to master "normal" mode */
249 mt9v022->chip_control &= ~0x10;
250 if (is_mt9v022_rev3(mt9v022->chip_version) ||
251 is_mt9v024(mt9v022->chip_version)) {
253 * Unset snapshot mode specific settings: clear bit 9
254 * and bit 2 in reg. 0x20 when in normal mode.
256 if (reg_clear(client, MT9V022_REG32, 0x204))
260 /* Switch to snapshot mode */
261 mt9v022->chip_control |= 0x10;
262 if (is_mt9v022_rev3(mt9v022->chip_version) ||
263 is_mt9v024(mt9v022->chip_version)) {
265 * Required settings for snapshot mode: set bit 9
266 * (RST enable) and bit 2 (CR enable) in reg. 0x20
267 * See TechNote TN0960 or TN-09-225.
269 if (reg_set(client, MT9V022_REG32, 0x204))
274 if (reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control) < 0)
279 static int mt9v022_set_selection(struct v4l2_subdev *sd,
280 struct v4l2_subdev_pad_config *cfg,
281 struct v4l2_subdev_selection *sel)
283 struct i2c_client *client = v4l2_get_subdevdata(sd);
284 struct mt9v022 *mt9v022 = to_mt9v022(client);
285 struct v4l2_rect rect = sel->r;
286 int min_row, min_blank;
289 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
290 sel->target != V4L2_SEL_TGT_CROP)
293 /* Bayer format - even size lengths */
294 if (mt9v022->fmts == mt9v022_colour_fmts) {
295 rect.width = ALIGN(rect.width, 2);
296 rect.height = ALIGN(rect.height, 2);
297 /* Let the user play with the starting pixel */
300 soc_camera_limit_side(&rect.left, &rect.width,
301 MT9V022_COLUMN_SKIP, MT9V022_MIN_WIDTH, MT9V022_MAX_WIDTH);
303 soc_camera_limit_side(&rect.top, &rect.height,
304 MT9V022_ROW_SKIP, MT9V022_MIN_HEIGHT, MT9V022_MAX_HEIGHT);
306 /* Like in example app. Contradicts the datasheet though */
307 ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
309 if (ret & 1) /* Autoexposure */
310 ret = reg_write(client, mt9v022->reg->max_total_shutter_width,
311 rect.height + mt9v022->y_skip_top + 43);
313 * If autoexposure is off, there is no need to set
314 * MT9V022_TOTAL_SHUTTER_WIDTH here. Autoexposure can be off
315 * only if the user has set exposure manually, using the
316 * V4L2_CID_EXPOSURE_AUTO with the value V4L2_EXPOSURE_MANUAL.
317 * In this case the register MT9V022_TOTAL_SHUTTER_WIDTH
318 * already contains the correct value.
321 /* Setup frame format: defaults apart from width and height */
323 ret = reg_write(client, MT9V022_COLUMN_START, rect.left);
325 ret = reg_write(client, MT9V022_ROW_START, rect.top);
327 * mt9v022: min total row time is 660 columns, min blanking is 43
328 * mt9v024: min total row time is 690 columns, min blanking is 61
330 if (is_mt9v024(mt9v022->chip_version)) {
338 ret = v4l2_ctrl_s_ctrl(mt9v022->hblank,
339 rect.width > min_row - min_blank ?
340 min_blank : min_row - rect.width);
342 ret = v4l2_ctrl_s_ctrl(mt9v022->vblank, 45);
344 ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect.width);
346 ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
347 rect.height + mt9v022->y_skip_top);
352 dev_dbg(&client->dev, "Frame %dx%d pixel\n", rect.width, rect.height);
354 mt9v022->rect = rect;
359 static int mt9v022_get_selection(struct v4l2_subdev *sd,
360 struct v4l2_subdev_pad_config *cfg,
361 struct v4l2_subdev_selection *sel)
363 struct i2c_client *client = v4l2_get_subdevdata(sd);
364 struct mt9v022 *mt9v022 = to_mt9v022(client);
366 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
369 switch (sel->target) {
370 case V4L2_SEL_TGT_CROP_BOUNDS:
371 sel->r.left = MT9V022_COLUMN_SKIP;
372 sel->r.top = MT9V022_ROW_SKIP;
373 sel->r.width = MT9V022_MAX_WIDTH;
374 sel->r.height = MT9V022_MAX_HEIGHT;
376 case V4L2_SEL_TGT_CROP:
377 sel->r = mt9v022->rect;
384 static int mt9v022_get_fmt(struct v4l2_subdev *sd,
385 struct v4l2_subdev_pad_config *cfg,
386 struct v4l2_subdev_format *format)
388 struct v4l2_mbus_framefmt *mf = &format->format;
389 struct i2c_client *client = v4l2_get_subdevdata(sd);
390 struct mt9v022 *mt9v022 = to_mt9v022(client);
395 mf->width = mt9v022->rect.width;
396 mf->height = mt9v022->rect.height;
397 mf->code = mt9v022->fmt->code;
398 mf->colorspace = mt9v022->fmt->colorspace;
399 mf->field = V4L2_FIELD_NONE;
404 static int mt9v022_s_fmt(struct v4l2_subdev *sd,
405 const struct mt9v022_datafmt *fmt,
406 struct v4l2_mbus_framefmt *mf)
408 struct i2c_client *client = v4l2_get_subdevdata(sd);
409 struct mt9v022 *mt9v022 = to_mt9v022(client);
410 struct v4l2_subdev_selection sel = {
411 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
412 .target = V4L2_SEL_TGT_CROP,
413 .r.left = mt9v022->rect.left,
414 .r.top = mt9v022->rect.top,
415 .r.width = mf->width,
416 .r.height = mf->height,
421 * The caller provides a supported format, as verified per call to
422 * .set_fmt(FORMAT_TRY), datawidth is from our supported format list
425 case MEDIA_BUS_FMT_Y8_1X8:
426 case MEDIA_BUS_FMT_Y10_1X10:
427 if (mt9v022->model != MT9V022IX7ATM)
430 case MEDIA_BUS_FMT_SBGGR8_1X8:
431 case MEDIA_BUS_FMT_SBGGR10_1X10:
432 if (mt9v022->model != MT9V022IX7ATC)
439 /* No support for scaling on this camera, just crop. */
440 ret = mt9v022_set_selection(sd, NULL, &sel);
442 mf->width = mt9v022->rect.width;
443 mf->height = mt9v022->rect.height;
445 mf->colorspace = fmt->colorspace;
451 static int mt9v022_set_fmt(struct v4l2_subdev *sd,
452 struct v4l2_subdev_pad_config *cfg,
453 struct v4l2_subdev_format *format)
455 struct v4l2_mbus_framefmt *mf = &format->format;
456 struct i2c_client *client = v4l2_get_subdevdata(sd);
457 struct mt9v022 *mt9v022 = to_mt9v022(client);
458 const struct mt9v022_datafmt *fmt;
459 int align = mf->code == MEDIA_BUS_FMT_SBGGR8_1X8 ||
460 mf->code == MEDIA_BUS_FMT_SBGGR10_1X10;
465 v4l_bound_align_image(&mf->width, MT9V022_MIN_WIDTH,
466 MT9V022_MAX_WIDTH, align,
467 &mf->height, MT9V022_MIN_HEIGHT + mt9v022->y_skip_top,
468 MT9V022_MAX_HEIGHT + mt9v022->y_skip_top, align, 0);
470 fmt = mt9v022_find_datafmt(mf->code, mt9v022->fmts,
474 mf->code = fmt->code;
477 mf->colorspace = fmt->colorspace;
479 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
480 return mt9v022_s_fmt(sd, fmt, mf);
485 #ifdef CONFIG_VIDEO_ADV_DEBUG
486 static int mt9v022_g_register(struct v4l2_subdev *sd,
487 struct v4l2_dbg_register *reg)
489 struct i2c_client *client = v4l2_get_subdevdata(sd);
495 reg->val = reg_read(client, reg->reg);
497 if (reg->val > 0xffff)
503 static int mt9v022_s_register(struct v4l2_subdev *sd,
504 const struct v4l2_dbg_register *reg)
506 struct i2c_client *client = v4l2_get_subdevdata(sd);
511 if (reg_write(client, reg->reg, reg->val) < 0)
518 static int mt9v022_s_power(struct v4l2_subdev *sd, int on)
520 struct i2c_client *client = v4l2_get_subdevdata(sd);
521 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
522 struct mt9v022 *mt9v022 = to_mt9v022(client);
524 return soc_camera_set_power(&client->dev, ssdd, mt9v022->clk, on);
527 static int mt9v022_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
529 struct mt9v022 *mt9v022 = container_of(ctrl->handler,
530 struct mt9v022, hdl);
531 struct v4l2_subdev *sd = &mt9v022->subdev;
532 struct i2c_client *client = v4l2_get_subdevdata(sd);
533 struct v4l2_ctrl *gain = mt9v022->gain;
534 struct v4l2_ctrl *exp = mt9v022->exposure;
539 case V4L2_CID_AUTOGAIN:
540 data = reg_read(client, MT9V022_ANALOG_GAIN);
544 range = gain->maximum - gain->minimum;
545 gain->val = ((data - 16) * range + 24) / 48 + gain->minimum;
547 case V4L2_CID_EXPOSURE_AUTO:
548 data = reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH);
552 range = exp->maximum - exp->minimum;
553 exp->val = ((data - 1) * range + 239) / 479 + exp->minimum;
555 case V4L2_CID_HBLANK:
556 data = reg_read(client, MT9V022_HORIZONTAL_BLANKING);
561 case V4L2_CID_VBLANK:
562 data = reg_read(client, MT9V022_VERTICAL_BLANKING);
571 static int mt9v022_s_ctrl(struct v4l2_ctrl *ctrl)
573 struct mt9v022 *mt9v022 = container_of(ctrl->handler,
574 struct mt9v022, hdl);
575 struct v4l2_subdev *sd = &mt9v022->subdev;
576 struct i2c_client *client = v4l2_get_subdevdata(sd);
582 data = reg_set(client, MT9V022_READ_MODE, 0x10);
584 data = reg_clear(client, MT9V022_READ_MODE, 0x10);
590 data = reg_set(client, MT9V022_READ_MODE, 0x20);
592 data = reg_clear(client, MT9V022_READ_MODE, 0x20);
596 case V4L2_CID_AUTOGAIN:
598 if (reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
601 struct v4l2_ctrl *gain = mt9v022->gain;
602 /* mt9v022 has minimum == default */
603 unsigned long range = gain->maximum - gain->minimum;
604 /* Valid values 16 to 64, 32 to 64 must be even. */
605 unsigned long gain_val = ((gain->val - (s32)gain->minimum) *
606 48 + range / 2) / range + 16;
612 * The user wants to set gain manually, hope, she
613 * knows, what she's doing... Switch AGC off.
615 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
618 dev_dbg(&client->dev, "Setting gain from %d to %lu\n",
619 reg_read(client, MT9V022_ANALOG_GAIN), gain_val);
620 if (reg_write(client, MT9V022_ANALOG_GAIN, gain_val) < 0)
624 case V4L2_CID_EXPOSURE_AUTO:
625 if (ctrl->val == V4L2_EXPOSURE_AUTO) {
626 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
628 struct v4l2_ctrl *exp = mt9v022->exposure;
629 unsigned long range = exp->maximum - exp->minimum;
630 unsigned long shutter = ((exp->val - (s32)exp->minimum) *
631 479 + range / 2) / range + 1;
634 * The user wants to set shutter width manually, hope,
635 * she knows, what she's doing... Switch AEC off.
637 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
640 dev_dbg(&client->dev, "Shutter width from %d to %lu\n",
641 reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
643 if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
648 case V4L2_CID_HBLANK:
649 if (reg_write(client, MT9V022_HORIZONTAL_BLANKING,
653 case V4L2_CID_VBLANK:
654 if (reg_write(client, MT9V022_VERTICAL_BLANKING,
663 * Interface active, can use i2c. If it fails, it can indeed mean, that
664 * this wasn't our capture interface, so, we wait for the right one
666 static int mt9v022_video_probe(struct i2c_client *client)
668 struct mt9v022 *mt9v022 = to_mt9v022(client);
669 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
674 ret = mt9v022_s_power(&mt9v022->subdev, 1);
678 /* Read out the chip version register */
679 data = reg_read(client, MT9V022_CHIP_VERSION);
681 /* must be 0x1311, 0x1313 or 0x1324 */
682 if (data != 0x1311 && data != 0x1313 && data != 0x1324) {
684 dev_info(&client->dev, "No MT9V022 found, ID register 0x%x\n",
689 mt9v022->chip_version = data;
691 mt9v022->reg = is_mt9v024(data) ? &mt9v024_register :
695 ret = reg_write(client, MT9V022_RESET, 1);
698 /* 15 clock cycles */
700 if (reg_read(client, MT9V022_RESET)) {
701 dev_err(&client->dev, "Resetting MT9V022 failed!\n");
707 /* Set monochrome or colour sensor type */
708 if (sensor_type && (!strcmp("colour", sensor_type) ||
709 !strcmp("color", sensor_type))) {
710 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
711 mt9v022->model = MT9V022IX7ATC;
712 mt9v022->fmts = mt9v022_colour_fmts;
714 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
715 mt9v022->model = MT9V022IX7ATM;
716 mt9v022->fmts = mt9v022_monochrome_fmts;
722 mt9v022->num_fmts = 0;
725 * This is a 10bit sensor, so by default we only allow 10bit.
726 * The platform may support different bus widths due to
727 * different routing of the data lines.
729 if (ssdd->query_bus_param)
730 flags = ssdd->query_bus_param(ssdd);
732 flags = SOCAM_DATAWIDTH_10;
734 if (flags & SOCAM_DATAWIDTH_10)
739 if (flags & SOCAM_DATAWIDTH_8)
742 mt9v022->fmt = &mt9v022->fmts[0];
744 dev_info(&client->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
745 data, mt9v022->model == MT9V022IX7ATM ?
746 "monochrome" : "colour");
748 ret = mt9v022_init(client);
750 dev_err(&client->dev, "Failed to initialise the camera\n");
753 mt9v022_s_power(&mt9v022->subdev, 0);
757 static int mt9v022_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
759 struct i2c_client *client = v4l2_get_subdevdata(sd);
760 struct mt9v022 *mt9v022 = to_mt9v022(client);
762 *lines = mt9v022->y_skip_top;
767 static const struct v4l2_ctrl_ops mt9v022_ctrl_ops = {
768 .g_volatile_ctrl = mt9v022_g_volatile_ctrl,
769 .s_ctrl = mt9v022_s_ctrl,
772 static const struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
773 #ifdef CONFIG_VIDEO_ADV_DEBUG
774 .g_register = mt9v022_g_register,
775 .s_register = mt9v022_s_register,
777 .s_power = mt9v022_s_power,
780 static int mt9v022_enum_mbus_code(struct v4l2_subdev *sd,
781 struct v4l2_subdev_pad_config *cfg,
782 struct v4l2_subdev_mbus_code_enum *code)
784 struct i2c_client *client = v4l2_get_subdevdata(sd);
785 struct mt9v022 *mt9v022 = to_mt9v022(client);
787 if (code->pad || code->index >= mt9v022->num_fmts)
790 code->code = mt9v022->fmts[code->index].code;
794 static int mt9v022_g_mbus_config(struct v4l2_subdev *sd,
795 struct v4l2_mbus_config *cfg)
797 struct i2c_client *client = v4l2_get_subdevdata(sd);
798 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
800 cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_SLAVE |
801 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
802 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
803 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
804 V4L2_MBUS_DATA_ACTIVE_HIGH;
805 cfg->type = V4L2_MBUS_PARALLEL;
806 cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
811 static int mt9v022_s_mbus_config(struct v4l2_subdev *sd,
812 const struct v4l2_mbus_config *cfg)
814 struct i2c_client *client = v4l2_get_subdevdata(sd);
815 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
816 struct mt9v022 *mt9v022 = to_mt9v022(client);
817 unsigned long flags = soc_camera_apply_board_flags(ssdd, cfg);
818 unsigned int bps = soc_mbus_get_fmtdesc(mt9v022->fmt->code)->bits_per_sample;
822 if (ssdd->set_bus_param) {
823 ret = ssdd->set_bus_param(ssdd, 1 << (bps - 1));
826 } else if (bps != 10) {
828 * Without board specific bus width settings we only support the
829 * sensors native bus width
834 if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
837 if (!(flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH))
840 if (!(flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH))
843 ret = reg_write(client, mt9v022->reg->pixclk_fv_lv, pixclk);
847 if (!(flags & V4L2_MBUS_MASTER))
848 mt9v022->chip_control &= ~0x8;
850 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
854 dev_dbg(&client->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
855 pixclk, mt9v022->chip_control);
860 static const struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
861 .s_stream = mt9v022_s_stream,
862 .g_mbus_config = mt9v022_g_mbus_config,
863 .s_mbus_config = mt9v022_s_mbus_config,
866 static const struct v4l2_subdev_sensor_ops mt9v022_subdev_sensor_ops = {
867 .g_skip_top_lines = mt9v022_g_skip_top_lines,
870 static const struct v4l2_subdev_pad_ops mt9v022_subdev_pad_ops = {
871 .enum_mbus_code = mt9v022_enum_mbus_code,
872 .get_selection = mt9v022_get_selection,
873 .set_selection = mt9v022_set_selection,
874 .get_fmt = mt9v022_get_fmt,
875 .set_fmt = mt9v022_set_fmt,
878 static const struct v4l2_subdev_ops mt9v022_subdev_ops = {
879 .core = &mt9v022_subdev_core_ops,
880 .video = &mt9v022_subdev_video_ops,
881 .sensor = &mt9v022_subdev_sensor_ops,
882 .pad = &mt9v022_subdev_pad_ops,
885 static int mt9v022_probe(struct i2c_client *client,
886 const struct i2c_device_id *did)
888 struct mt9v022 *mt9v022;
889 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
890 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
891 struct mt9v022_platform_data *pdata;
895 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
899 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
900 dev_warn(&adapter->dev,
901 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
905 mt9v022 = devm_kzalloc(&client->dev, sizeof(struct mt9v022), GFP_KERNEL);
909 pdata = ssdd->drv_priv;
910 v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
911 v4l2_ctrl_handler_init(&mt9v022->hdl, 6);
912 v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
913 V4L2_CID_VFLIP, 0, 1, 1, 0);
914 v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
915 V4L2_CID_HFLIP, 0, 1, 1, 0);
916 mt9v022->autogain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
917 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
918 mt9v022->gain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
919 V4L2_CID_GAIN, 0, 127, 1, 64);
922 * Simulated autoexposure. If enabled, we calculate shutter width
923 * ourselves in the driver based on vertical blanking and frame width
925 mt9v022->autoexposure = v4l2_ctrl_new_std_menu(&mt9v022->hdl,
926 &mt9v022_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
928 mt9v022->exposure = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
929 V4L2_CID_EXPOSURE, 1, 255, 1, 255);
931 mt9v022->hblank = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
932 V4L2_CID_HBLANK, MT9V022_HORIZONTAL_BLANKING_MIN,
933 MT9V022_HORIZONTAL_BLANKING_MAX, 1,
934 MT9V022_HORIZONTAL_BLANKING_DEF);
936 mt9v022->vblank = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
937 V4L2_CID_VBLANK, MT9V022_VERTICAL_BLANKING_MIN,
938 MT9V022_VERTICAL_BLANKING_MAX, 1,
939 MT9V022_VERTICAL_BLANKING_DEF);
941 mt9v022->subdev.ctrl_handler = &mt9v022->hdl;
942 if (mt9v022->hdl.error) {
943 int err = mt9v022->hdl.error;
945 dev_err(&client->dev, "control initialisation err %d\n", err);
948 v4l2_ctrl_auto_cluster(2, &mt9v022->autoexposure,
949 V4L2_EXPOSURE_MANUAL, true);
950 v4l2_ctrl_auto_cluster(2, &mt9v022->autogain, 0, true);
952 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
955 * On some platforms the first read out line is corrupted.
956 * Workaround it by skipping if indicated by platform data.
958 mt9v022->y_skip_top = pdata ? pdata->y_skip_top : 0;
959 mt9v022->rect.left = MT9V022_COLUMN_SKIP;
960 mt9v022->rect.top = MT9V022_ROW_SKIP;
961 mt9v022->rect.width = MT9V022_MAX_WIDTH;
962 mt9v022->rect.height = MT9V022_MAX_HEIGHT;
964 mt9v022->clk = v4l2_clk_get(&client->dev, "mclk");
965 if (IS_ERR(mt9v022->clk)) {
966 ret = PTR_ERR(mt9v022->clk);
970 ret = mt9v022_video_probe(client);
972 v4l2_clk_put(mt9v022->clk);
974 v4l2_ctrl_handler_free(&mt9v022->hdl);
980 static int mt9v022_remove(struct i2c_client *client)
982 struct mt9v022 *mt9v022 = to_mt9v022(client);
983 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
985 v4l2_clk_put(mt9v022->clk);
986 v4l2_device_unregister_subdev(&mt9v022->subdev);
988 ssdd->free_bus(ssdd);
989 v4l2_ctrl_handler_free(&mt9v022->hdl);
993 static const struct i2c_device_id mt9v022_id[] = {
997 MODULE_DEVICE_TABLE(i2c, mt9v022_id);
999 static struct i2c_driver mt9v022_i2c_driver = {
1003 .probe = mt9v022_probe,
1004 .remove = mt9v022_remove,
1005 .id_table = mt9v022_id,
1008 module_i2c_driver(mt9v022_i2c_driver);
1010 MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
1011 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
1012 MODULE_LICENSE("GPL");