2 * Driver for MT9T031 CMOS Image Sensor from Micron
4 * Copyright (C) 2008, Guennadi Liakhovetski, DENX Software Engineering <lg@denx.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/log2.h>
16 #include <media/v4l2-subdev.h>
17 #include <media/v4l2-chip-ident.h>
18 #include <media/soc_camera.h>
20 /* mt9t031 i2c address 0x5d
21 * The platform has to define i2c_board_info and link to it from
22 * struct soc_camera_link */
24 /* mt9t031 selected register addresses */
25 #define MT9T031_CHIP_VERSION 0x00
26 #define MT9T031_ROW_START 0x01
27 #define MT9T031_COLUMN_START 0x02
28 #define MT9T031_WINDOW_HEIGHT 0x03
29 #define MT9T031_WINDOW_WIDTH 0x04
30 #define MT9T031_HORIZONTAL_BLANKING 0x05
31 #define MT9T031_VERTICAL_BLANKING 0x06
32 #define MT9T031_OUTPUT_CONTROL 0x07
33 #define MT9T031_SHUTTER_WIDTH_UPPER 0x08
34 #define MT9T031_SHUTTER_WIDTH 0x09
35 #define MT9T031_PIXEL_CLOCK_CONTROL 0x0a
36 #define MT9T031_FRAME_RESTART 0x0b
37 #define MT9T031_SHUTTER_DELAY 0x0c
38 #define MT9T031_RESET 0x0d
39 #define MT9T031_READ_MODE_1 0x1e
40 #define MT9T031_READ_MODE_2 0x20
41 #define MT9T031_READ_MODE_3 0x21
42 #define MT9T031_ROW_ADDRESS_MODE 0x22
43 #define MT9T031_COLUMN_ADDRESS_MODE 0x23
44 #define MT9T031_GLOBAL_GAIN 0x35
45 #define MT9T031_CHIP_ENABLE 0xF8
47 #define MT9T031_MAX_HEIGHT 1536
48 #define MT9T031_MAX_WIDTH 2048
49 #define MT9T031_MIN_HEIGHT 2
50 #define MT9T031_MIN_WIDTH 18
51 #define MT9T031_HORIZONTAL_BLANK 142
52 #define MT9T031_VERTICAL_BLANK 25
53 #define MT9T031_COLUMN_SKIP 32
54 #define MT9T031_ROW_SKIP 20
56 #define MT9T031_BUS_PARAM (SOCAM_PCLK_SAMPLE_RISING | \
57 SOCAM_PCLK_SAMPLE_FALLING | SOCAM_HSYNC_ACTIVE_HIGH | \
58 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_DATA_ACTIVE_HIGH | \
59 SOCAM_MASTER | SOCAM_DATAWIDTH_10)
61 static const struct soc_camera_data_format mt9t031_colour_formats
[] = {
63 .name
= "Bayer (sRGB) 10 bit",
65 .fourcc
= V4L2_PIX_FMT_SGRBG10
,
66 .colorspace
= V4L2_COLORSPACE_SRGB
,
71 struct v4l2_subdev subdev
;
72 struct v4l2_rect rect
; /* Sensor window */
73 int model
; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */
76 unsigned char autoexposure
;
79 static struct mt9t031
*to_mt9t031(const struct i2c_client
*client
)
81 return container_of(i2c_get_clientdata(client
), struct mt9t031
, subdev
);
84 static int reg_read(struct i2c_client
*client
, const u8 reg
)
86 s32 data
= i2c_smbus_read_word_data(client
, reg
);
87 return data
< 0 ? data
: swab16(data
);
90 static int reg_write(struct i2c_client
*client
, const u8 reg
,
93 return i2c_smbus_write_word_data(client
, reg
, swab16(data
));
96 static int reg_set(struct i2c_client
*client
, const u8 reg
,
101 ret
= reg_read(client
, reg
);
104 return reg_write(client
, reg
, ret
| data
);
107 static int reg_clear(struct i2c_client
*client
, const u8 reg
,
112 ret
= reg_read(client
, reg
);
115 return reg_write(client
, reg
, ret
& ~data
);
118 static int set_shutter(struct i2c_client
*client
, const u32 data
)
122 ret
= reg_write(client
, MT9T031_SHUTTER_WIDTH_UPPER
, data
>> 16);
125 ret
= reg_write(client
, MT9T031_SHUTTER_WIDTH
, data
& 0xffff);
130 static int get_shutter(struct i2c_client
*client
, u32
*data
)
134 ret
= reg_read(client
, MT9T031_SHUTTER_WIDTH_UPPER
);
138 ret
= reg_read(client
, MT9T031_SHUTTER_WIDTH
);
139 *data
|= ret
& 0xffff;
141 return ret
< 0 ? ret
: 0;
144 static int mt9t031_idle(struct i2c_client
*client
)
148 /* Disable chip output, synchronous option update */
149 ret
= reg_write(client
, MT9T031_RESET
, 1);
151 ret
= reg_write(client
, MT9T031_RESET
, 0);
153 ret
= reg_clear(client
, MT9T031_OUTPUT_CONTROL
, 2);
155 return ret
>= 0 ? 0 : -EIO
;
158 static int mt9t031_disable(struct i2c_client
*client
)
160 /* Disable the chip */
161 reg_clear(client
, MT9T031_OUTPUT_CONTROL
, 2);
166 static int mt9t031_s_stream(struct v4l2_subdev
*sd
, int enable
)
168 struct i2c_client
*client
= sd
->priv
;
172 /* Switch to master "normal" mode */
173 ret
= reg_set(client
, MT9T031_OUTPUT_CONTROL
, 2);
175 /* Stop sensor readout */
176 ret
= reg_clear(client
, MT9T031_OUTPUT_CONTROL
, 2);
184 static int mt9t031_set_bus_param(struct soc_camera_device
*icd
,
187 struct i2c_client
*client
= to_i2c_client(to_soc_camera_control(icd
));
189 /* The caller should have queried our parameters, check anyway */
190 if (flags
& ~MT9T031_BUS_PARAM
)
193 if (flags
& SOCAM_PCLK_SAMPLE_FALLING
)
194 reg_clear(client
, MT9T031_PIXEL_CLOCK_CONTROL
, 0x8000);
196 reg_set(client
, MT9T031_PIXEL_CLOCK_CONTROL
, 0x8000);
201 static unsigned long mt9t031_query_bus_param(struct soc_camera_device
*icd
)
203 struct soc_camera_link
*icl
= to_soc_camera_link(icd
);
205 return soc_camera_apply_sensor_flags(icl
, MT9T031_BUS_PARAM
);
208 /* target must be _even_ */
209 static u16
mt9t031_skip(s32
*source
, s32 target
, s32 max
)
213 if (*source
< target
+ target
/ 2) {
218 skip
= min(max
, *source
+ target
/ 2) / target
;
221 *source
= target
* skip
;
226 /* rect is the sensor rectangle, the caller guarantees parameter validity */
227 static int mt9t031_set_params(struct soc_camera_device
*icd
,
228 struct v4l2_rect
*rect
, u16 xskip
, u16 yskip
)
230 struct i2c_client
*client
= to_i2c_client(to_soc_camera_control(icd
));
231 struct mt9t031
*mt9t031
= to_mt9t031(client
);
234 const u16 hblank
= MT9T031_HORIZONTAL_BLANK
,
235 vblank
= MT9T031_VERTICAL_BLANK
;
237 xbin
= min(xskip
, (u16
)3);
238 ybin
= min(yskip
, (u16
)3);
241 * Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper.
242 * There is always a valid suitably aligned value. The worst case is
243 * xbin = 3, width = 2048. Then we will start at 36, the last read out
244 * pixel will be 2083, which is < 2085 - first black pixel.
246 * MT9T031 datasheet imposes window left border alignment, depending on
247 * the selected xskip. Failing to conform to this requirement produces
248 * dark horizontal stripes in the image. However, even obeying to this
249 * requirement doesn't eliminate the stripes in all configurations. They
250 * appear "locally reproducibly," but can differ between tests under
251 * different lighting conditions.
261 rect
->left
= rect
->left
> roundup(MT9T031_COLUMN_SKIP
, 6) ?
262 (rect
->left
/ 6) * 6 : roundup(MT9T031_COLUMN_SKIP
, 6);
267 dev_dbg(&client
->dev
, "skip %u:%u, rect %ux%u@%u:%u\n",
268 xskip
, yskip
, rect
->width
, rect
->height
, rect
->left
, rect
->top
);
270 /* Disable register update, reconfigure atomically */
271 ret
= reg_set(client
, MT9T031_OUTPUT_CONTROL
, 1);
275 /* Blanking and start values - default... */
276 ret
= reg_write(client
, MT9T031_HORIZONTAL_BLANKING
, hblank
);
278 ret
= reg_write(client
, MT9T031_VERTICAL_BLANKING
, vblank
);
280 if (yskip
!= mt9t031
->yskip
|| xskip
!= mt9t031
->xskip
) {
281 /* Binning, skipping */
283 ret
= reg_write(client
, MT9T031_COLUMN_ADDRESS_MODE
,
284 ((xbin
- 1) << 4) | (xskip
- 1));
286 ret
= reg_write(client
, MT9T031_ROW_ADDRESS_MODE
,
287 ((ybin
- 1) << 4) | (yskip
- 1));
289 dev_dbg(&client
->dev
, "new physical left %u, top %u\n",
290 rect
->left
, rect
->top
);
292 /* The caller provides a supported format, as guaranteed by
293 * icd->try_fmt_cap(), soc_camera_s_crop() and soc_camera_cropcap() */
295 ret
= reg_write(client
, MT9T031_COLUMN_START
, rect
->left
);
297 ret
= reg_write(client
, MT9T031_ROW_START
, rect
->top
);
299 ret
= reg_write(client
, MT9T031_WINDOW_WIDTH
, rect
->width
- 1);
301 ret
= reg_write(client
, MT9T031_WINDOW_HEIGHT
,
302 rect
->height
+ icd
->y_skip_top
- 1);
303 if (ret
>= 0 && mt9t031
->autoexposure
) {
304 ret
= set_shutter(client
,
305 rect
->height
+ icd
->y_skip_top
+ vblank
);
307 const u32 shutter_max
= MT9T031_MAX_HEIGHT
+ vblank
;
308 const struct v4l2_queryctrl
*qctrl
=
309 soc_camera_find_qctrl(icd
->ops
,
311 icd
->exposure
= (shutter_max
/ 2 + (rect
->height
+
312 icd
->y_skip_top
+ vblank
- 1) *
313 (qctrl
->maximum
- qctrl
->minimum
)) /
314 shutter_max
+ qctrl
->minimum
;
318 /* Re-enable register update, commit all changes */
320 ret
= reg_clear(client
, MT9T031_OUTPUT_CONTROL
, 1);
323 mt9t031
->rect
= *rect
;
324 mt9t031
->xskip
= xskip
;
325 mt9t031
->yskip
= yskip
;
328 return ret
< 0 ? ret
: 0;
331 static int mt9t031_s_crop(struct v4l2_subdev
*sd
, struct v4l2_crop
*a
)
333 struct v4l2_rect rect
= a
->c
;
334 struct i2c_client
*client
= sd
->priv
;
335 struct mt9t031
*mt9t031
= to_mt9t031(client
);
336 struct soc_camera_device
*icd
= client
->dev
.platform_data
;
338 rect
.width
= ALIGN(rect
.width
, 2);
339 rect
.height
= ALIGN(rect
.height
, 2);
341 soc_camera_limit_side(&rect
.left
, &rect
.width
,
342 MT9T031_COLUMN_SKIP
, MT9T031_MIN_WIDTH
, MT9T031_MAX_WIDTH
);
344 soc_camera_limit_side(&rect
.top
, &rect
.height
,
345 MT9T031_ROW_SKIP
, MT9T031_MIN_HEIGHT
, MT9T031_MAX_HEIGHT
);
347 return mt9t031_set_params(icd
, &rect
, mt9t031
->xskip
, mt9t031
->yskip
);
350 static int mt9t031_g_crop(struct v4l2_subdev
*sd
, struct v4l2_crop
*a
)
352 struct i2c_client
*client
= sd
->priv
;
353 struct mt9t031
*mt9t031
= to_mt9t031(client
);
355 a
->c
= mt9t031
->rect
;
356 a
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
361 static int mt9t031_cropcap(struct v4l2_subdev
*sd
, struct v4l2_cropcap
*a
)
363 a
->bounds
.left
= MT9T031_COLUMN_SKIP
;
364 a
->bounds
.top
= MT9T031_ROW_SKIP
;
365 a
->bounds
.width
= MT9T031_MAX_WIDTH
;
366 a
->bounds
.height
= MT9T031_MAX_HEIGHT
;
367 a
->defrect
= a
->bounds
;
368 a
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
369 a
->pixelaspect
.numerator
= 1;
370 a
->pixelaspect
.denominator
= 1;
375 static int mt9t031_g_fmt(struct v4l2_subdev
*sd
, struct v4l2_format
*f
)
377 struct i2c_client
*client
= sd
->priv
;
378 struct mt9t031
*mt9t031
= to_mt9t031(client
);
379 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
381 pix
->width
= mt9t031
->rect
.width
/ mt9t031
->xskip
;
382 pix
->height
= mt9t031
->rect
.height
/ mt9t031
->yskip
;
383 pix
->pixelformat
= V4L2_PIX_FMT_SGRBG10
;
384 pix
->field
= V4L2_FIELD_NONE
;
385 pix
->colorspace
= V4L2_COLORSPACE_SRGB
;
390 static int mt9t031_s_fmt(struct v4l2_subdev
*sd
, struct v4l2_format
*f
)
392 struct i2c_client
*client
= sd
->priv
;
393 struct mt9t031
*mt9t031
= to_mt9t031(client
);
394 struct soc_camera_device
*icd
= client
->dev
.platform_data
;
395 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
397 struct v4l2_rect rect
= mt9t031
->rect
;
400 * try_fmt has put width and height within limits.
401 * S_FMT: use binning and skipping for scaling
403 xskip
= mt9t031_skip(&rect
.width
, pix
->width
, MT9T031_MAX_WIDTH
);
404 yskip
= mt9t031_skip(&rect
.height
, pix
->height
, MT9T031_MAX_HEIGHT
);
406 /* mt9t031_set_params() doesn't change width and height */
407 return mt9t031_set_params(icd
, &rect
, xskip
, yskip
);
411 * If a user window larger than sensor window is requested, we'll increase the
414 static int mt9t031_try_fmt(struct v4l2_subdev
*sd
, struct v4l2_format
*f
)
416 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
418 v4l_bound_align_image(
419 &pix
->width
, MT9T031_MIN_WIDTH
, MT9T031_MAX_WIDTH
, 1,
420 &pix
->height
, MT9T031_MIN_HEIGHT
, MT9T031_MAX_HEIGHT
, 1, 0);
425 static int mt9t031_g_chip_ident(struct v4l2_subdev
*sd
,
426 struct v4l2_dbg_chip_ident
*id
)
428 struct i2c_client
*client
= sd
->priv
;
429 struct mt9t031
*mt9t031
= to_mt9t031(client
);
431 if (id
->match
.type
!= V4L2_CHIP_MATCH_I2C_ADDR
)
434 if (id
->match
.addr
!= client
->addr
)
437 id
->ident
= mt9t031
->model
;
443 #ifdef CONFIG_VIDEO_ADV_DEBUG
444 static int mt9t031_g_register(struct v4l2_subdev
*sd
,
445 struct v4l2_dbg_register
*reg
)
447 struct i2c_client
*client
= sd
->priv
;
449 if (reg
->match
.type
!= V4L2_CHIP_MATCH_I2C_ADDR
|| reg
->reg
> 0xff)
452 if (reg
->match
.addr
!= client
->addr
)
455 reg
->val
= reg_read(client
, reg
->reg
);
457 if (reg
->val
> 0xffff)
463 static int mt9t031_s_register(struct v4l2_subdev
*sd
,
464 struct v4l2_dbg_register
*reg
)
466 struct i2c_client
*client
= sd
->priv
;
468 if (reg
->match
.type
!= V4L2_CHIP_MATCH_I2C_ADDR
|| reg
->reg
> 0xff)
471 if (reg
->match
.addr
!= client
->addr
)
474 if (reg_write(client
, reg
->reg
, reg
->val
) < 0)
481 static const struct v4l2_queryctrl mt9t031_controls
[] = {
483 .id
= V4L2_CID_VFLIP
,
484 .type
= V4L2_CTRL_TYPE_BOOLEAN
,
485 .name
= "Flip Vertically",
491 .id
= V4L2_CID_HFLIP
,
492 .type
= V4L2_CTRL_TYPE_BOOLEAN
,
493 .name
= "Flip Horizontally",
500 .type
= V4L2_CTRL_TYPE_INTEGER
,
506 .flags
= V4L2_CTRL_FLAG_SLIDER
,
508 .id
= V4L2_CID_EXPOSURE
,
509 .type
= V4L2_CTRL_TYPE_INTEGER
,
514 .default_value
= 255,
515 .flags
= V4L2_CTRL_FLAG_SLIDER
,
517 .id
= V4L2_CID_EXPOSURE_AUTO
,
518 .type
= V4L2_CTRL_TYPE_BOOLEAN
,
519 .name
= "Automatic Exposure",
527 static struct soc_camera_ops mt9t031_ops
= {
528 .set_bus_param
= mt9t031_set_bus_param
,
529 .query_bus_param
= mt9t031_query_bus_param
,
530 .controls
= mt9t031_controls
,
531 .num_controls
= ARRAY_SIZE(mt9t031_controls
),
534 static int mt9t031_g_ctrl(struct v4l2_subdev
*sd
, struct v4l2_control
*ctrl
)
536 struct i2c_client
*client
= sd
->priv
;
537 struct mt9t031
*mt9t031
= to_mt9t031(client
);
542 data
= reg_read(client
, MT9T031_READ_MODE_2
);
545 ctrl
->value
= !!(data
& 0x8000);
548 data
= reg_read(client
, MT9T031_READ_MODE_2
);
551 ctrl
->value
= !!(data
& 0x4000);
553 case V4L2_CID_EXPOSURE_AUTO
:
554 ctrl
->value
= mt9t031
->autoexposure
;
560 static int mt9t031_s_ctrl(struct v4l2_subdev
*sd
, struct v4l2_control
*ctrl
)
562 struct i2c_client
*client
= sd
->priv
;
563 struct mt9t031
*mt9t031
= to_mt9t031(client
);
564 struct soc_camera_device
*icd
= client
->dev
.platform_data
;
565 const struct v4l2_queryctrl
*qctrl
;
568 qctrl
= soc_camera_find_qctrl(&mt9t031_ops
, ctrl
->id
);
576 data
= reg_set(client
, MT9T031_READ_MODE_2
, 0x8000);
578 data
= reg_clear(client
, MT9T031_READ_MODE_2
, 0x8000);
584 data
= reg_set(client
, MT9T031_READ_MODE_2
, 0x4000);
586 data
= reg_clear(client
, MT9T031_READ_MODE_2
, 0x4000);
591 if (ctrl
->value
> qctrl
->maximum
|| ctrl
->value
< qctrl
->minimum
)
593 /* See Datasheet Table 7, Gain settings. */
594 if (ctrl
->value
<= qctrl
->default_value
) {
595 /* Pack it into 0..1 step 0.125, register values 0..8 */
596 unsigned long range
= qctrl
->default_value
- qctrl
->minimum
;
597 data
= ((ctrl
->value
- qctrl
->minimum
) * 8 + range
/ 2) / range
;
599 dev_dbg(&client
->dev
, "Setting gain %d\n", data
);
600 data
= reg_write(client
, MT9T031_GLOBAL_GAIN
, data
);
604 /* Pack it into 1.125..128 variable step, register values 9..0x7860 */
605 /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
606 unsigned long range
= qctrl
->maximum
- qctrl
->default_value
- 1;
607 /* calculated gain: map 65..127 to 9..1024 step 0.125 */
608 unsigned long gain
= ((ctrl
->value
- qctrl
->default_value
- 1) *
609 1015 + range
/ 2) / range
+ 9;
611 if (gain
<= 32) /* calculated gain 9..32 -> 9..32 */
613 else if (gain
<= 64) /* calculated gain 33..64 -> 0x51..0x60 */
614 data
= ((gain
- 32) * 16 + 16) / 32 + 80;
616 /* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */
617 data
= (((gain
- 64 + 7) * 32) & 0xff00) | 0x60;
619 dev_dbg(&client
->dev
, "Set gain from 0x%x to 0x%x\n",
620 reg_read(client
, MT9T031_GLOBAL_GAIN
), data
);
621 data
= reg_write(client
, MT9T031_GLOBAL_GAIN
, data
);
627 icd
->gain
= ctrl
->value
;
629 case V4L2_CID_EXPOSURE
:
630 /* mt9t031 has maximum == default */
631 if (ctrl
->value
> qctrl
->maximum
|| ctrl
->value
< qctrl
->minimum
)
634 const unsigned long range
= qctrl
->maximum
- qctrl
->minimum
;
635 const u32 shutter
= ((ctrl
->value
- qctrl
->minimum
) * 1048 +
636 range
/ 2) / range
+ 1;
639 get_shutter(client
, &old
);
640 dev_dbg(&client
->dev
, "Set shutter from %u to %u\n",
642 if (set_shutter(client
, shutter
) < 0)
644 icd
->exposure
= ctrl
->value
;
645 mt9t031
->autoexposure
= 0;
648 case V4L2_CID_EXPOSURE_AUTO
:
650 const u16 vblank
= MT9T031_VERTICAL_BLANK
;
651 const u32 shutter_max
= MT9T031_MAX_HEIGHT
+ vblank
;
652 if (set_shutter(client
, mt9t031
->rect
.height
+
653 icd
->y_skip_top
+ vblank
) < 0)
655 qctrl
= soc_camera_find_qctrl(icd
->ops
, V4L2_CID_EXPOSURE
);
656 icd
->exposure
= (shutter_max
/ 2 +
657 (mt9t031
->rect
.height
+
658 icd
->y_skip_top
+ vblank
- 1) *
659 (qctrl
->maximum
- qctrl
->minimum
)) /
660 shutter_max
+ qctrl
->minimum
;
661 mt9t031
->autoexposure
= 1;
663 mt9t031
->autoexposure
= 0;
669 /* Interface active, can use i2c. If it fails, it can indeed mean, that
670 * this wasn't our capture interface, so, we wait for the right one */
671 static int mt9t031_video_probe(struct i2c_client
*client
)
673 struct soc_camera_device
*icd
= client
->dev
.platform_data
;
674 struct mt9t031
*mt9t031
= to_mt9t031(client
);
678 /* Enable the chip */
679 data
= reg_write(client
, MT9T031_CHIP_ENABLE
, 1);
680 dev_dbg(&client
->dev
, "write: %d\n", data
);
682 /* Read out the chip version register */
683 data
= reg_read(client
, MT9T031_CHIP_VERSION
);
687 mt9t031
->model
= V4L2_IDENT_MT9T031
;
688 icd
->formats
= mt9t031_colour_formats
;
689 icd
->num_formats
= ARRAY_SIZE(mt9t031_colour_formats
);
692 dev_err(&client
->dev
,
693 "No MT9T031 chip detected, register read %x\n", data
);
697 dev_info(&client
->dev
, "Detected a MT9T031 chip ID %x\n", data
);
699 ret
= mt9t031_idle(client
);
701 dev_err(&client
->dev
, "Failed to initialise the camera\n");
706 static struct v4l2_subdev_core_ops mt9t031_subdev_core_ops
= {
707 .g_ctrl
= mt9t031_g_ctrl
,
708 .s_ctrl
= mt9t031_s_ctrl
,
709 .g_chip_ident
= mt9t031_g_chip_ident
,
710 #ifdef CONFIG_VIDEO_ADV_DEBUG
711 .g_register
= mt9t031_g_register
,
712 .s_register
= mt9t031_s_register
,
716 static struct v4l2_subdev_video_ops mt9t031_subdev_video_ops
= {
717 .s_stream
= mt9t031_s_stream
,
718 .s_fmt
= mt9t031_s_fmt
,
719 .g_fmt
= mt9t031_g_fmt
,
720 .try_fmt
= mt9t031_try_fmt
,
721 .s_crop
= mt9t031_s_crop
,
722 .g_crop
= mt9t031_g_crop
,
723 .cropcap
= mt9t031_cropcap
,
726 static struct v4l2_subdev_ops mt9t031_subdev_ops
= {
727 .core
= &mt9t031_subdev_core_ops
,
728 .video
= &mt9t031_subdev_video_ops
,
731 static int mt9t031_probe(struct i2c_client
*client
,
732 const struct i2c_device_id
*did
)
734 struct mt9t031
*mt9t031
;
735 struct soc_camera_device
*icd
= client
->dev
.platform_data
;
736 struct i2c_adapter
*adapter
= to_i2c_adapter(client
->dev
.parent
);
737 struct soc_camera_link
*icl
;
741 dev_err(&client
->dev
, "MT9T031: missing soc-camera data!\n");
745 icl
= to_soc_camera_link(icd
);
747 dev_err(&client
->dev
, "MT9T031 driver needs platform data\n");
751 if (!i2c_check_functionality(adapter
, I2C_FUNC_SMBUS_WORD_DATA
)) {
752 dev_warn(&adapter
->dev
,
753 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
757 mt9t031
= kzalloc(sizeof(struct mt9t031
), GFP_KERNEL
);
761 v4l2_i2c_subdev_init(&mt9t031
->subdev
, client
, &mt9t031_subdev_ops
);
763 /* Second stage probe - when a capture adapter is there */
764 icd
->ops
= &mt9t031_ops
;
767 mt9t031
->rect
.left
= MT9T031_COLUMN_SKIP
;
768 mt9t031
->rect
.top
= MT9T031_ROW_SKIP
;
769 mt9t031
->rect
.width
= MT9T031_MAX_WIDTH
;
770 mt9t031
->rect
.height
= MT9T031_MAX_HEIGHT
;
772 /* Simulated autoexposure. If enabled, we calculate shutter width
773 * ourselves in the driver based on vertical blanking and frame width */
774 mt9t031
->autoexposure
= 1;
779 mt9t031_idle(client
);
781 ret
= mt9t031_video_probe(client
);
783 mt9t031_disable(client
);
787 i2c_set_clientdata(client
, NULL
);
794 static int mt9t031_remove(struct i2c_client
*client
)
796 struct mt9t031
*mt9t031
= to_mt9t031(client
);
797 struct soc_camera_device
*icd
= client
->dev
.platform_data
;
800 i2c_set_clientdata(client
, NULL
);
801 client
->driver
= NULL
;
807 static const struct i2c_device_id mt9t031_id
[] = {
811 MODULE_DEVICE_TABLE(i2c
, mt9t031_id
);
813 static struct i2c_driver mt9t031_i2c_driver
= {
817 .probe
= mt9t031_probe
,
818 .remove
= mt9t031_remove
,
819 .id_table
= mt9t031_id
,
822 static int __init
mt9t031_mod_init(void)
824 return i2c_add_driver(&mt9t031_i2c_driver
);
827 static void __exit
mt9t031_mod_exit(void)
829 i2c_del_driver(&mt9t031_i2c_driver
);
832 module_init(mt9t031_mod_init
);
833 module_exit(mt9t031_mod_exit
);
835 MODULE_DESCRIPTION("Micron MT9T031 Camera driver");
836 MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>");
837 MODULE_LICENSE("GPL v2");