2 * Driver for MT9M032 CMOS Image Sensor from Micron
4 * Copyright (C) 2010-2011 Lund Engineering
5 * Contact: Gil Lund <gwlund@lundeng.com>
6 * Author: Martin Hostettler <martin@neutronstar.dyndns.org>
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
23 #include <linux/delay.h>
24 #include <linux/i2c.h>
25 #include <linux/init.h>
26 #include <linux/kernel.h>
27 #include <linux/math64.h>
28 #include <linux/module.h>
29 #include <linux/mutex.h>
30 #include <linux/slab.h>
31 #include <linux/v4l2-mediabus.h>
33 #include <media/media-entity.h>
34 #include <media/mt9m032.h>
35 #include <media/v4l2-ctrls.h>
36 #include <media/v4l2-device.h>
37 #include <media/v4l2-subdev.h>
39 #include "aptina-pll.h"
42 * width and height include active boundary and black parts
44 * column 0- 15 active boundary
45 * column 16-1455 image
46 * column 1456-1471 active boundary
47 * column 1472-1599 black
50 * row 53- 59 active boundary
52 * row 1140-1147 active boundary
56 #define MT9M032_PIXEL_ARRAY_WIDTH 1600
57 #define MT9M032_PIXEL_ARRAY_HEIGHT 1152
59 #define MT9M032_CHIP_VERSION 0x00
60 #define MT9M032_CHIP_VERSION_VALUE 0x1402
61 #define MT9M032_ROW_START 0x01
62 #define MT9M032_ROW_START_MIN 0
63 #define MT9M032_ROW_START_MAX 1152
64 #define MT9M032_ROW_START_DEF 60
65 #define MT9M032_COLUMN_START 0x02
66 #define MT9M032_COLUMN_START_MIN 0
67 #define MT9M032_COLUMN_START_MAX 1600
68 #define MT9M032_COLUMN_START_DEF 16
69 #define MT9M032_ROW_SIZE 0x03
70 #define MT9M032_ROW_SIZE_MIN 32
71 #define MT9M032_ROW_SIZE_MAX 1152
72 #define MT9M032_ROW_SIZE_DEF 1080
73 #define MT9M032_COLUMN_SIZE 0x04
74 #define MT9M032_COLUMN_SIZE_MIN 32
75 #define MT9M032_COLUMN_SIZE_MAX 1600
76 #define MT9M032_COLUMN_SIZE_DEF 1440
77 #define MT9M032_HBLANK 0x05
78 #define MT9M032_VBLANK 0x06
79 #define MT9M032_VBLANK_MAX 0x7ff
80 #define MT9M032_SHUTTER_WIDTH_HIGH 0x08
81 #define MT9M032_SHUTTER_WIDTH_LOW 0x09
82 #define MT9M032_SHUTTER_WIDTH_MIN 1
83 #define MT9M032_SHUTTER_WIDTH_MAX 1048575
84 #define MT9M032_SHUTTER_WIDTH_DEF 1943
85 #define MT9M032_PIX_CLK_CTRL 0x0a
86 #define MT9M032_PIX_CLK_CTRL_INV_PIXCLK 0x8000
87 #define MT9M032_RESTART 0x0b
88 #define MT9M032_RESET 0x0d
89 #define MT9M032_PLL_CONFIG1 0x11
90 #define MT9M032_PLL_CONFIG1_OUTDIV_MASK 0x3f
91 #define MT9M032_PLL_CONFIG1_MUL_SHIFT 8
92 #define MT9M032_READ_MODE1 0x1e
93 #define MT9M032_READ_MODE2 0x20
94 #define MT9M032_READ_MODE2_VFLIP_SHIFT 15
95 #define MT9M032_READ_MODE2_HFLIP_SHIFT 14
96 #define MT9M032_READ_MODE2_ROW_BLC 0x40
97 #define MT9M032_GAIN_GREEN1 0x2b
98 #define MT9M032_GAIN_BLUE 0x2c
99 #define MT9M032_GAIN_RED 0x2d
100 #define MT9M032_GAIN_GREEN2 0x2e
103 #define MT9M032_GAIN_ALL 0x35
104 #define MT9M032_GAIN_DIGITAL_MASK 0x7f
105 #define MT9M032_GAIN_DIGITAL_SHIFT 8
106 #define MT9M032_GAIN_AMUL_SHIFT 6
107 #define MT9M032_GAIN_ANALOG_MASK 0x3f
108 #define MT9M032_FORMATTER1 0x9e
109 #define MT9M032_FORMATTER2 0x9f
110 #define MT9M032_FORMATTER2_DOUT_EN 0x1000
111 #define MT9M032_FORMATTER2_PIXCLK_EN 0x2000
114 * The available MT9M032 datasheet is missing documentation for register 0x10
115 * MT9P031 seems to be close enough, so use constants from that datasheet for
117 * But keep the name MT9P031 to remind us, that this isn't really confirmed
120 #define MT9P031_PLL_CONTROL 0x10
121 #define MT9P031_PLL_CONTROL_PWROFF 0x0050
122 #define MT9P031_PLL_CONTROL_PWRON 0x0051
123 #define MT9P031_PLL_CONTROL_USEPLL 0x0052
124 #define MT9P031_PLL_CONFIG2 0x11
125 #define MT9P031_PLL_CONFIG2_P1_DIV_MASK 0x1f
128 struct v4l2_subdev subdev;
129 struct media_pad pad;
130 struct mt9m032_platform_data *pdata;
132 unsigned int pix_clock;
134 struct v4l2_ctrl_handler ctrls;
136 struct v4l2_ctrl *hflip;
137 struct v4l2_ctrl *vflip;
140 struct mutex lock; /* Protects streaming, format, interval and crop */
144 struct v4l2_mbus_framefmt format;
145 struct v4l2_rect crop;
146 struct v4l2_fract frame_interval;
149 #define to_mt9m032(sd) container_of(sd, struct mt9m032, subdev)
150 #define to_dev(sensor) \
151 (&((struct i2c_client *)v4l2_get_subdevdata(&(sensor)->subdev))->dev)
153 static int mt9m032_read(struct i2c_client *client, u8 reg)
155 return i2c_smbus_read_word_swapped(client, reg);
158 static int mt9m032_write(struct i2c_client *client, u8 reg, const u16 data)
160 return i2c_smbus_write_word_swapped(client, reg, data);
163 static u32 mt9m032_row_time(struct mt9m032 *sensor, unsigned int width)
165 unsigned int effective_width;
168 effective_width = width + 716; /* empirical value */
169 ns = div_u64(1000000000ULL * effective_width, sensor->pix_clock);
170 dev_dbg(to_dev(sensor), "MT9M032 line time: %u ns\n", ns);
174 static int mt9m032_update_timing(struct mt9m032 *sensor,
175 struct v4l2_fract *interval)
177 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
178 struct v4l2_rect *crop = &sensor->crop;
179 unsigned int min_vblank;
184 interval = &sensor->frame_interval;
186 row_time = mt9m032_row_time(sensor, crop->width);
188 vblank = div_u64(1000000000ULL * interval->numerator,
189 (u64)row_time * interval->denominator)
192 if (vblank > MT9M032_VBLANK_MAX) {
193 /* hardware limits to 11 bit values */
194 interval->denominator = 1000;
195 interval->numerator =
196 div_u64((crop->height + MT9M032_VBLANK_MAX) *
197 (u64)row_time * interval->denominator,
199 vblank = div_u64(1000000000ULL * interval->numerator,
200 (u64)row_time * interval->denominator)
203 /* enforce minimal 1.6ms blanking time. */
204 min_vblank = 1600000 / row_time;
205 vblank = clamp_t(unsigned int, vblank, min_vblank, MT9M032_VBLANK_MAX);
207 return mt9m032_write(client, MT9M032_VBLANK, vblank);
210 static int mt9m032_update_geom_timing(struct mt9m032 *sensor)
212 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
215 ret = mt9m032_write(client, MT9M032_COLUMN_SIZE,
216 sensor->crop.width - 1);
218 ret = mt9m032_write(client, MT9M032_ROW_SIZE,
219 sensor->crop.height - 1);
221 ret = mt9m032_write(client, MT9M032_COLUMN_START,
224 ret = mt9m032_write(client, MT9M032_ROW_START,
227 ret = mt9m032_update_timing(sensor, NULL);
231 static int update_formatter2(struct mt9m032 *sensor, bool streaming)
233 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
234 u16 reg_val = MT9M032_FORMATTER2_DOUT_EN
235 | 0x0070; /* parts reserved! */
236 /* possibly for changing to 14-bit mode */
239 reg_val |= MT9M032_FORMATTER2_PIXCLK_EN; /* pixclock enable */
241 return mt9m032_write(client, MT9M032_FORMATTER2, reg_val);
244 static int mt9m032_setup_pll(struct mt9m032 *sensor)
246 static const struct aptina_pll_limits limits = {
247 .ext_clock_min = 8000000,
248 .ext_clock_max = 16500000,
249 .int_clock_min = 2000000,
250 .int_clock_max = 24000000,
251 .out_clock_min = 322000000,
252 .out_clock_max = 693000000,
253 .pix_clock_max = 99000000,
262 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
263 struct mt9m032_platform_data *pdata = sensor->pdata;
264 struct aptina_pll pll;
267 pll.ext_clock = pdata->ext_clock;
268 pll.pix_clock = pdata->pix_clock;
270 ret = aptina_pll_calculate(&client->dev, &limits, &pll);
274 sensor->pix_clock = pdata->pix_clock;
276 ret = mt9m032_write(client, MT9M032_PLL_CONFIG1,
277 (pll.m << MT9M032_PLL_CONFIG1_MUL_SHIFT)
280 ret = mt9m032_write(client, MT9P031_PLL_CONFIG2, pll.n - 1);
282 ret = mt9m032_write(client, MT9P031_PLL_CONTROL,
283 MT9P031_PLL_CONTROL_PWRON |
284 MT9P031_PLL_CONTROL_USEPLL);
285 if (!ret) /* more reserved, Continuous, Master Mode */
286 ret = mt9m032_write(client, MT9M032_READ_MODE1, 0x8006);
287 if (!ret) /* Set 14-bit mode, select 7 divider */
288 ret = mt9m032_write(client, MT9M032_FORMATTER1, 0x111e);
293 /* -----------------------------------------------------------------------------
294 * Subdev pad operations
297 static int mt9m032_enum_mbus_code(struct v4l2_subdev *subdev,
298 struct v4l2_subdev_fh *fh,
299 struct v4l2_subdev_mbus_code_enum *code)
301 if (code->index != 0)
304 code->code = V4L2_MBUS_FMT_Y8_1X8;
308 static int mt9m032_enum_frame_size(struct v4l2_subdev *subdev,
309 struct v4l2_subdev_fh *fh,
310 struct v4l2_subdev_frame_size_enum *fse)
312 if (fse->index != 0 || fse->code != V4L2_MBUS_FMT_Y8_1X8)
315 fse->min_width = MT9M032_COLUMN_SIZE_DEF;
316 fse->max_width = MT9M032_COLUMN_SIZE_DEF;
317 fse->min_height = MT9M032_ROW_SIZE_DEF;
318 fse->max_height = MT9M032_ROW_SIZE_DEF;
324 * __mt9m032_get_pad_crop() - get crop rect
325 * @sensor: pointer to the sensor struct
326 * @fh: file handle for getting the try crop rect from
327 * @which: select try or active crop rect
329 * Returns a pointer the current active or fh relative try crop rect
331 static struct v4l2_rect *
332 __mt9m032_get_pad_crop(struct mt9m032 *sensor, struct v4l2_subdev_fh *fh,
333 enum v4l2_subdev_format_whence which)
336 case V4L2_SUBDEV_FORMAT_TRY:
337 return v4l2_subdev_get_try_crop(fh, 0);
338 case V4L2_SUBDEV_FORMAT_ACTIVE:
339 return &sensor->crop;
346 * __mt9m032_get_pad_format() - get format
347 * @sensor: pointer to the sensor struct
348 * @fh: file handle for getting the try format from
349 * @which: select try or active format
351 * Returns a pointer the current active or fh relative try format
353 static struct v4l2_mbus_framefmt *
354 __mt9m032_get_pad_format(struct mt9m032 *sensor, struct v4l2_subdev_fh *fh,
355 enum v4l2_subdev_format_whence which)
358 case V4L2_SUBDEV_FORMAT_TRY:
359 return v4l2_subdev_get_try_format(fh, 0);
360 case V4L2_SUBDEV_FORMAT_ACTIVE:
361 return &sensor->format;
367 static int mt9m032_get_pad_format(struct v4l2_subdev *subdev,
368 struct v4l2_subdev_fh *fh,
369 struct v4l2_subdev_format *fmt)
371 struct mt9m032 *sensor = to_mt9m032(subdev);
373 mutex_lock(&sensor->lock);
374 fmt->format = *__mt9m032_get_pad_format(sensor, fh, fmt->which);
375 mutex_unlock(&sensor->lock);
380 static int mt9m032_set_pad_format(struct v4l2_subdev *subdev,
381 struct v4l2_subdev_fh *fh,
382 struct v4l2_subdev_format *fmt)
384 struct mt9m032 *sensor = to_mt9m032(subdev);
387 mutex_lock(&sensor->lock);
389 if (sensor->streaming && fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
394 /* Scaling is not supported, the format is thus fixed. */
395 ret = mt9m032_get_pad_format(subdev, fh, fmt);
398 mutex_lock(&sensor->lock);
402 static int mt9m032_get_pad_crop(struct v4l2_subdev *subdev,
403 struct v4l2_subdev_fh *fh,
404 struct v4l2_subdev_crop *crop)
406 struct mt9m032 *sensor = to_mt9m032(subdev);
408 mutex_lock(&sensor->lock);
409 crop->rect = *__mt9m032_get_pad_crop(sensor, fh, crop->which);
410 mutex_unlock(&sensor->lock);
415 static int mt9m032_set_pad_crop(struct v4l2_subdev *subdev,
416 struct v4l2_subdev_fh *fh,
417 struct v4l2_subdev_crop *crop)
419 struct mt9m032 *sensor = to_mt9m032(subdev);
420 struct v4l2_mbus_framefmt *format;
421 struct v4l2_rect *__crop;
422 struct v4l2_rect rect;
425 mutex_lock(&sensor->lock);
427 if (sensor->streaming && crop->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
432 /* Clamp the crop rectangle boundaries and align them to a multiple of 2
433 * pixels to ensure a GRBG Bayer pattern.
435 rect.left = clamp(ALIGN(crop->rect.left, 2), MT9M032_COLUMN_START_MIN,
436 MT9M032_COLUMN_START_MAX);
437 rect.top = clamp(ALIGN(crop->rect.top, 2), MT9M032_ROW_START_MIN,
438 MT9M032_ROW_START_MAX);
439 rect.width = clamp(ALIGN(crop->rect.width, 2), MT9M032_COLUMN_SIZE_MIN,
440 MT9M032_COLUMN_SIZE_MAX);
441 rect.height = clamp(ALIGN(crop->rect.height, 2), MT9M032_ROW_SIZE_MIN,
442 MT9M032_ROW_SIZE_MAX);
444 rect.width = min(rect.width, MT9M032_PIXEL_ARRAY_WIDTH - rect.left);
445 rect.height = min(rect.height, MT9M032_PIXEL_ARRAY_HEIGHT - rect.top);
447 __crop = __mt9m032_get_pad_crop(sensor, fh, crop->which);
449 if (rect.width != __crop->width || rect.height != __crop->height) {
450 /* Reset the output image size if the crop rectangle size has
453 format = __mt9m032_get_pad_format(sensor, fh, crop->which);
454 format->width = rect.width;
455 format->height = rect.height;
461 if (crop->which == V4L2_SUBDEV_FORMAT_ACTIVE)
462 ret = mt9m032_update_geom_timing(sensor);
465 mutex_unlock(&sensor->lock);
469 static int mt9m032_get_frame_interval(struct v4l2_subdev *subdev,
470 struct v4l2_subdev_frame_interval *fi)
472 struct mt9m032 *sensor = to_mt9m032(subdev);
474 mutex_lock(&sensor->lock);
475 memset(fi, 0, sizeof(*fi));
476 fi->interval = sensor->frame_interval;
477 mutex_unlock(&sensor->lock);
482 static int mt9m032_set_frame_interval(struct v4l2_subdev *subdev,
483 struct v4l2_subdev_frame_interval *fi)
485 struct mt9m032 *sensor = to_mt9m032(subdev);
488 mutex_lock(&sensor->lock);
490 if (sensor->streaming) {
495 /* Avoid divisions by 0. */
496 if (fi->interval.denominator == 0)
497 fi->interval.denominator = 1;
499 ret = mt9m032_update_timing(sensor, &fi->interval);
501 sensor->frame_interval = fi->interval;
504 mutex_unlock(&sensor->lock);
508 static int mt9m032_s_stream(struct v4l2_subdev *subdev, int streaming)
510 struct mt9m032 *sensor = to_mt9m032(subdev);
513 mutex_lock(&sensor->lock);
514 ret = update_formatter2(sensor, streaming);
516 sensor->streaming = streaming;
517 mutex_unlock(&sensor->lock);
522 /* -----------------------------------------------------------------------------
523 * V4L2 subdev core operations
526 #ifdef CONFIG_VIDEO_ADV_DEBUG
527 static int mt9m032_g_register(struct v4l2_subdev *sd,
528 struct v4l2_dbg_register *reg)
530 struct mt9m032 *sensor = to_mt9m032(sd);
531 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
534 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
536 if (reg->match.addr != client->addr)
539 val = mt9m032_read(client, reg->reg);
549 static int mt9m032_s_register(struct v4l2_subdev *sd,
550 struct v4l2_dbg_register *reg)
552 struct mt9m032 *sensor = to_mt9m032(sd);
553 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
555 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
558 if (reg->match.addr != client->addr)
561 return mt9m032_write(client, reg->reg, reg->val);
565 /* -----------------------------------------------------------------------------
566 * V4L2 subdev control operations
569 static int update_read_mode2(struct mt9m032 *sensor, bool vflip, bool hflip)
571 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
572 int reg_val = (vflip << MT9M032_READ_MODE2_VFLIP_SHIFT)
573 | (hflip << MT9M032_READ_MODE2_HFLIP_SHIFT)
574 | MT9M032_READ_MODE2_ROW_BLC
577 return mt9m032_write(client, MT9M032_READ_MODE2, reg_val);
580 static int mt9m032_set_gain(struct mt9m032 *sensor, s32 val)
582 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
583 int digital_gain_val; /* in 1/8th (0..127) */
584 int analog_mul; /* 0 or 1 */
585 int analog_gain_val; /* in 1/16th. (0..63) */
588 digital_gain_val = 51; /* from setup example */
592 analog_gain_val = val;
595 analog_gain_val = val / 2;
598 /* a_gain = (1 + analog_mul) + (analog_gain_val + 1) / 16 */
599 /* overall_gain = a_gain * (1 + digital_gain_val / 8) */
601 reg_val = ((digital_gain_val & MT9M032_GAIN_DIGITAL_MASK)
602 << MT9M032_GAIN_DIGITAL_SHIFT)
603 | ((analog_mul & 1) << MT9M032_GAIN_AMUL_SHIFT)
604 | (analog_gain_val & MT9M032_GAIN_ANALOG_MASK);
606 return mt9m032_write(client, MT9M032_GAIN_ALL, reg_val);
609 static int mt9m032_try_ctrl(struct v4l2_ctrl *ctrl)
611 if (ctrl->id == V4L2_CID_GAIN && ctrl->val >= 63) {
612 /* round because of multiplier used for values >= 63 */
619 static int mt9m032_set_ctrl(struct v4l2_ctrl *ctrl)
621 struct mt9m032 *sensor =
622 container_of(ctrl->handler, struct mt9m032, ctrls);
623 struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
628 return mt9m032_set_gain(sensor, ctrl->val);
631 /* case V4L2_CID_VFLIP: -- In the same cluster */
632 return update_read_mode2(sensor, sensor->vflip->val,
635 case V4L2_CID_EXPOSURE:
636 ret = mt9m032_write(client, MT9M032_SHUTTER_WIDTH_HIGH,
637 (ctrl->val >> 16) & 0xffff);
641 return mt9m032_write(client, MT9M032_SHUTTER_WIDTH_LOW,
648 static struct v4l2_ctrl_ops mt9m032_ctrl_ops = {
649 .s_ctrl = mt9m032_set_ctrl,
650 .try_ctrl = mt9m032_try_ctrl,
653 /* -------------------------------------------------------------------------- */
655 static const struct v4l2_subdev_core_ops mt9m032_core_ops = {
656 #ifdef CONFIG_VIDEO_ADV_DEBUG
657 .g_register = mt9m032_g_register,
658 .s_register = mt9m032_s_register,
662 static const struct v4l2_subdev_video_ops mt9m032_video_ops = {
663 .s_stream = mt9m032_s_stream,
664 .g_frame_interval = mt9m032_get_frame_interval,
665 .s_frame_interval = mt9m032_set_frame_interval,
668 static const struct v4l2_subdev_pad_ops mt9m032_pad_ops = {
669 .enum_mbus_code = mt9m032_enum_mbus_code,
670 .enum_frame_size = mt9m032_enum_frame_size,
671 .get_fmt = mt9m032_get_pad_format,
672 .set_fmt = mt9m032_set_pad_format,
673 .set_crop = mt9m032_set_pad_crop,
674 .get_crop = mt9m032_get_pad_crop,
677 static const struct v4l2_subdev_ops mt9m032_ops = {
678 .core = &mt9m032_core_ops,
679 .video = &mt9m032_video_ops,
680 .pad = &mt9m032_pad_ops,
683 /* -----------------------------------------------------------------------------
684 * Driver initialization and probing
687 static int mt9m032_probe(struct i2c_client *client,
688 const struct i2c_device_id *devid)
690 struct i2c_adapter *adapter = client->adapter;
691 struct mt9m032 *sensor;
695 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
696 dev_warn(&client->dev,
697 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
701 if (!client->dev.platform_data)
704 sensor = kzalloc(sizeof(*sensor), GFP_KERNEL);
708 mutex_init(&sensor->lock);
710 sensor->pdata = client->dev.platform_data;
712 v4l2_i2c_subdev_init(&sensor->subdev, client, &mt9m032_ops);
713 sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
715 chip_version = mt9m032_read(client, MT9M032_CHIP_VERSION);
716 if (chip_version != MT9M032_CHIP_VERSION_VALUE) {
717 dev_err(&client->dev, "MT9M032 not detected, wrong version "
718 "0x%04x\n", chip_version);
723 dev_info(&client->dev, "MT9M032 detected at address 0x%02x\n",
726 sensor->frame_interval.numerator = 1;
727 sensor->frame_interval.denominator = 30;
729 sensor->crop.left = MT9M032_COLUMN_START_DEF;
730 sensor->crop.top = MT9M032_ROW_START_DEF;
731 sensor->crop.width = MT9M032_COLUMN_SIZE_DEF;
732 sensor->crop.height = MT9M032_ROW_SIZE_DEF;
734 sensor->format.width = sensor->crop.width;
735 sensor->format.height = sensor->crop.height;
736 sensor->format.code = V4L2_MBUS_FMT_Y8_1X8;
737 sensor->format.field = V4L2_FIELD_NONE;
738 sensor->format.colorspace = V4L2_COLORSPACE_SRGB;
740 v4l2_ctrl_handler_init(&sensor->ctrls, 4);
742 v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops,
743 V4L2_CID_GAIN, 0, 127, 1, 64);
745 sensor->hflip = v4l2_ctrl_new_std(&sensor->ctrls,
747 V4L2_CID_HFLIP, 0, 1, 1, 0);
748 sensor->vflip = v4l2_ctrl_new_std(&sensor->ctrls,
750 V4L2_CID_VFLIP, 0, 1, 1, 0);
752 v4l2_ctrl_new_std(&sensor->ctrls, &mt9m032_ctrl_ops,
753 V4L2_CID_EXPOSURE, MT9M032_SHUTTER_WIDTH_MIN,
754 MT9M032_SHUTTER_WIDTH_MAX, 1,
755 MT9M032_SHUTTER_WIDTH_DEF);
757 if (sensor->ctrls.error) {
758 ret = sensor->ctrls.error;
759 dev_err(&client->dev, "control initialization error %d\n", ret);
763 v4l2_ctrl_cluster(2, &sensor->hflip);
765 sensor->subdev.ctrl_handler = &sensor->ctrls;
766 sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
767 ret = media_entity_init(&sensor->subdev.entity, 1, &sensor->pad, 0);
771 ret = mt9m032_write(client, MT9M032_RESET, 1); /* reset on */
774 mt9m032_write(client, MT9M032_RESET, 0); /* reset off */
778 ret = mt9m032_setup_pll(sensor);
781 usleep_range(10000, 11000);
783 ret = v4l2_ctrl_handler_setup(&sensor->ctrls);
788 ret = mt9m032_update_geom_timing(sensor);
792 ret = mt9m032_write(client, 0x41, 0x0000); /* reserved !!! */
795 ret = mt9m032_write(client, 0x42, 0x0003); /* reserved !!! */
798 ret = mt9m032_write(client, 0x43, 0x0003); /* reserved !!! */
801 ret = mt9m032_write(client, 0x7f, 0x0000); /* reserved !!! */
804 if (sensor->pdata->invert_pixclock) {
805 ret = mt9m032_write(client, MT9M032_PIX_CLK_CTRL,
806 MT9M032_PIX_CLK_CTRL_INV_PIXCLK);
811 ret = mt9m032_write(client, MT9M032_RESTART, 1); /* Restart on */
815 ret = mt9m032_write(client, MT9M032_RESTART, 0); /* Restart off */
819 ret = update_formatter2(sensor, false);
826 media_entity_cleanup(&sensor->subdev.entity);
828 v4l2_ctrl_handler_free(&sensor->ctrls);
830 mutex_destroy(&sensor->lock);
835 static int mt9m032_remove(struct i2c_client *client)
837 struct v4l2_subdev *subdev = i2c_get_clientdata(client);
838 struct mt9m032 *sensor = to_mt9m032(subdev);
840 v4l2_device_unregister_subdev(&sensor->subdev);
841 v4l2_ctrl_handler_free(&sensor->ctrls);
842 media_entity_cleanup(&sensor->subdev.entity);
843 mutex_destroy(&sensor->lock);
848 static const struct i2c_device_id mt9m032_id_table[] = {
853 MODULE_DEVICE_TABLE(i2c, mt9m032_id_table);
855 static struct i2c_driver mt9m032_i2c_driver = {
857 .name = MT9M032_NAME,
859 .probe = mt9m032_probe,
860 .remove = mt9m032_remove,
861 .id_table = mt9m032_id_table,
864 module_i2c_driver(mt9m032_i2c_driver);
866 MODULE_AUTHOR("Martin Hostettler <martin@neutronstar.dyndns.org>");
867 MODULE_DESCRIPTION("MT9M032 camera sensor driver");
868 MODULE_LICENSE("GPL v2");