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-common.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
22 * and call i2c_register_board_info() */
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 2
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 int model
; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */
72 unsigned char autoexposure
;
77 static int reg_read(struct i2c_client
*client
, const u8 reg
)
79 s32 data
= i2c_smbus_read_word_data(client
, reg
);
80 return data
< 0 ? data
: swab16(data
);
83 static int reg_write(struct i2c_client
*client
, const u8 reg
,
86 return i2c_smbus_write_word_data(client
, reg
, swab16(data
));
89 static int reg_set(struct i2c_client
*client
, const u8 reg
,
94 ret
= reg_read(client
, reg
);
97 return reg_write(client
, reg
, ret
| data
);
100 static int reg_clear(struct i2c_client
*client
, const u8 reg
,
105 ret
= reg_read(client
, reg
);
108 return reg_write(client
, reg
, ret
& ~data
);
111 static int set_shutter(struct i2c_client
*client
, const u32 data
)
115 ret
= reg_write(client
, MT9T031_SHUTTER_WIDTH_UPPER
, data
>> 16);
118 ret
= reg_write(client
, MT9T031_SHUTTER_WIDTH
, data
& 0xffff);
123 static int get_shutter(struct i2c_client
*client
, u32
*data
)
127 ret
= reg_read(client
, MT9T031_SHUTTER_WIDTH_UPPER
);
131 ret
= reg_read(client
, MT9T031_SHUTTER_WIDTH
);
132 *data
|= ret
& 0xffff;
134 return ret
< 0 ? ret
: 0;
137 static int mt9t031_init(struct soc_camera_device
*icd
)
139 struct i2c_client
*client
= to_i2c_client(to_soc_camera_control(icd
));
140 struct soc_camera_link
*icl
= to_soc_camera_link(icd
);
144 ret
= icl
->power(&client
->dev
, 1);
146 dev_err(icd
->vdev
->parent
,
147 "Platform failed to power-on the camera.\n");
152 /* Disable chip output, synchronous option update */
153 ret
= reg_write(client
, MT9T031_RESET
, 1);
155 ret
= reg_write(client
, MT9T031_RESET
, 0);
157 ret
= reg_clear(client
, MT9T031_OUTPUT_CONTROL
, 2);
159 if (ret
< 0 && icl
->power
)
160 icl
->power(&client
->dev
, 0);
162 return ret
>= 0 ? 0 : -EIO
;
165 static int mt9t031_release(struct soc_camera_device
*icd
)
167 struct i2c_client
*client
= to_i2c_client(to_soc_camera_control(icd
));
168 struct soc_camera_link
*icl
= to_soc_camera_link(icd
);
170 /* Disable the chip */
171 reg_clear(client
, MT9T031_OUTPUT_CONTROL
, 2);
174 icl
->power(&client
->dev
, 0);
179 static int mt9t031_start_capture(struct soc_camera_device
*icd
)
181 struct i2c_client
*client
= to_i2c_client(to_soc_camera_control(icd
));
183 /* Switch to master "normal" mode */
184 if (reg_set(client
, MT9T031_OUTPUT_CONTROL
, 2) < 0)
189 static int mt9t031_stop_capture(struct soc_camera_device
*icd
)
191 struct i2c_client
*client
= to_i2c_client(to_soc_camera_control(icd
));
193 /* Stop sensor readout */
194 if (reg_clear(client
, MT9T031_OUTPUT_CONTROL
, 2) < 0)
199 static int mt9t031_set_bus_param(struct soc_camera_device
*icd
,
202 struct i2c_client
*client
= to_i2c_client(to_soc_camera_control(icd
));
204 /* The caller should have queried our parameters, check anyway */
205 if (flags
& ~MT9T031_BUS_PARAM
)
208 if (flags
& SOCAM_PCLK_SAMPLE_FALLING
)
209 reg_clear(client
, MT9T031_PIXEL_CLOCK_CONTROL
, 0x8000);
211 reg_set(client
, MT9T031_PIXEL_CLOCK_CONTROL
, 0x8000);
216 static unsigned long mt9t031_query_bus_param(struct soc_camera_device
*icd
)
218 struct soc_camera_link
*icl
= to_soc_camera_link(icd
);
220 return soc_camera_apply_sensor_flags(icl
, MT9T031_BUS_PARAM
);
223 /* Round up minima and round down maxima */
224 static void recalculate_limits(struct soc_camera_device
*icd
,
225 u16 xskip
, u16 yskip
)
227 icd
->x_min
= (MT9T031_COLUMN_SKIP
+ xskip
- 1) / xskip
;
228 icd
->y_min
= (MT9T031_ROW_SKIP
+ yskip
- 1) / yskip
;
229 icd
->width_min
= (MT9T031_MIN_WIDTH
+ xskip
- 1) / xskip
;
230 icd
->height_min
= (MT9T031_MIN_HEIGHT
+ yskip
- 1) / yskip
;
231 icd
->width_max
= MT9T031_MAX_WIDTH
/ xskip
;
232 icd
->height_max
= MT9T031_MAX_HEIGHT
/ yskip
;
235 static int mt9t031_set_params(struct soc_camera_device
*icd
,
236 struct v4l2_rect
*rect
, u16 xskip
, u16 yskip
)
238 struct i2c_client
*client
= to_i2c_client(to_soc_camera_control(icd
));
239 struct mt9t031
*mt9t031
= i2c_get_clientdata(client
);
241 u16 xbin
, ybin
, width
, height
, left
, top
;
242 const u16 hblank
= MT9T031_HORIZONTAL_BLANK
,
243 vblank
= MT9T031_VERTICAL_BLANK
;
245 /* Make sure we don't exceed sensor limits */
246 if (rect
->left
+ rect
->width
> icd
->width_max
)
247 rect
->left
= (icd
->width_max
- rect
->width
) / 2 + icd
->x_min
;
249 if (rect
->top
+ rect
->height
> icd
->height_max
)
250 rect
->top
= (icd
->height_max
- rect
->height
) / 2 + icd
->y_min
;
252 width
= rect
->width
* xskip
;
253 height
= rect
->height
* yskip
;
254 left
= rect
->left
* xskip
;
255 top
= rect
->top
* yskip
;
257 xbin
= min(xskip
, (u16
)3);
258 ybin
= min(yskip
, (u16
)3);
260 dev_dbg(&icd
->dev
, "xskip %u, width %u/%u, yskip %u, height %u/%u\n",
261 xskip
, width
, rect
->width
, yskip
, height
, rect
->height
);
263 /* Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper */
266 left
= (left
+ 3) & ~3;
269 left
= roundup(left
, 6);
274 top
= (top
+ 3) & ~3;
277 top
= roundup(top
, 6);
280 /* Disable register update, reconfigure atomically */
281 ret
= reg_set(client
, MT9T031_OUTPUT_CONTROL
, 1);
285 /* Blanking and start values - default... */
286 ret
= reg_write(client
, MT9T031_HORIZONTAL_BLANKING
, hblank
);
288 ret
= reg_write(client
, MT9T031_VERTICAL_BLANKING
, vblank
);
290 if (yskip
!= mt9t031
->yskip
|| xskip
!= mt9t031
->xskip
) {
291 /* Binning, skipping */
293 ret
= reg_write(client
, MT9T031_COLUMN_ADDRESS_MODE
,
294 ((xbin
- 1) << 4) | (xskip
- 1));
296 ret
= reg_write(client
, MT9T031_ROW_ADDRESS_MODE
,
297 ((ybin
- 1) << 4) | (yskip
- 1));
299 dev_dbg(&icd
->dev
, "new physical left %u, top %u\n", left
, top
);
301 /* The caller provides a supported format, as guaranteed by
302 * icd->try_fmt_cap(), soc_camera_s_crop() and soc_camera_cropcap() */
304 ret
= reg_write(client
, MT9T031_COLUMN_START
, left
);
306 ret
= reg_write(client
, MT9T031_ROW_START
, top
);
308 ret
= reg_write(client
, MT9T031_WINDOW_WIDTH
, width
- 1);
310 ret
= reg_write(client
, MT9T031_WINDOW_HEIGHT
,
311 height
+ icd
->y_skip_top
- 1);
312 if (ret
>= 0 && mt9t031
->autoexposure
) {
313 ret
= set_shutter(client
, height
+ icd
->y_skip_top
+ vblank
);
315 const u32 shutter_max
= MT9T031_MAX_HEIGHT
+ vblank
;
316 const struct v4l2_queryctrl
*qctrl
=
317 soc_camera_find_qctrl(icd
->ops
,
319 icd
->exposure
= (shutter_max
/ 2 + (height
+
320 icd
->y_skip_top
+ vblank
- 1) *
321 (qctrl
->maximum
- qctrl
->minimum
)) /
322 shutter_max
+ qctrl
->minimum
;
326 /* Re-enable register update, commit all changes */
328 ret
= reg_clear(client
, MT9T031_OUTPUT_CONTROL
, 1);
330 return ret
< 0 ? ret
: 0;
333 static int mt9t031_set_crop(struct soc_camera_device
*icd
,
334 struct v4l2_rect
*rect
)
336 struct i2c_client
*client
= to_i2c_client(to_soc_camera_control(icd
));
337 struct mt9t031
*mt9t031
= i2c_get_clientdata(client
);
339 /* CROP - no change in scaling, or in limits */
340 return mt9t031_set_params(icd
, rect
, mt9t031
->xskip
, mt9t031
->yskip
);
343 static int mt9t031_set_fmt(struct soc_camera_device
*icd
,
344 struct v4l2_format
*f
)
346 struct i2c_client
*client
= to_i2c_client(to_soc_camera_control(icd
));
347 struct mt9t031
*mt9t031
= i2c_get_clientdata(client
);
350 struct v4l2_rect rect
= {
351 .left
= icd
->x_current
,
352 .top
= icd
->y_current
,
353 .width
= f
->fmt
.pix
.width
,
354 .height
= f
->fmt
.pix
.height
,
358 * try_fmt has put rectangle within limits.
359 * S_FMT - use binning and skipping for scaling, recalculate
360 * limits, used for cropping
362 /* Is this more optimal than just a division? */
363 for (xskip
= 8; xskip
> 1; xskip
--)
364 if (rect
.width
* xskip
<= MT9T031_MAX_WIDTH
)
367 for (yskip
= 8; yskip
> 1; yskip
--)
368 if (rect
.height
* yskip
<= MT9T031_MAX_HEIGHT
)
371 recalculate_limits(icd
, xskip
, yskip
);
373 ret
= mt9t031_set_params(icd
, &rect
, xskip
, yskip
);
375 mt9t031
->xskip
= xskip
;
376 mt9t031
->yskip
= yskip
;
382 static int mt9t031_try_fmt(struct soc_camera_device
*icd
,
383 struct v4l2_format
*f
)
385 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
387 v4l_bound_align_image(
388 &pix
->width
, MT9T031_MIN_WIDTH
, MT9T031_MAX_WIDTH
, 1,
389 &pix
->height
, MT9T031_MIN_HEIGHT
, MT9T031_MAX_HEIGHT
, 1, 0);
394 static int mt9t031_get_chip_id(struct soc_camera_device
*icd
,
395 struct v4l2_dbg_chip_ident
*id
)
397 struct i2c_client
*client
= to_i2c_client(to_soc_camera_control(icd
));
398 struct mt9t031
*mt9t031
= i2c_get_clientdata(client
);
400 if (id
->match
.type
!= V4L2_CHIP_MATCH_I2C_ADDR
)
403 if (id
->match
.addr
!= client
->addr
)
406 id
->ident
= mt9t031
->model
;
412 #ifdef CONFIG_VIDEO_ADV_DEBUG
413 static int mt9t031_get_register(struct soc_camera_device
*icd
,
414 struct v4l2_dbg_register
*reg
)
416 struct i2c_client
*client
= to_i2c_client(to_soc_camera_control(icd
));
418 if (reg
->match
.type
!= V4L2_CHIP_MATCH_I2C_ADDR
|| reg
->reg
> 0xff)
421 if (reg
->match
.addr
!= client
->addr
)
424 reg
->val
= reg_read(client
, reg
->reg
);
426 if (reg
->val
> 0xffff)
432 static int mt9t031_set_register(struct soc_camera_device
*icd
,
433 struct v4l2_dbg_register
*reg
)
435 struct i2c_client
*client
= to_i2c_client(to_soc_camera_control(icd
));
437 if (reg
->match
.type
!= V4L2_CHIP_MATCH_I2C_ADDR
|| reg
->reg
> 0xff)
440 if (reg
->match
.addr
!= client
->addr
)
443 if (reg_write(client
, reg
->reg
, reg
->val
) < 0)
450 static const struct v4l2_queryctrl mt9t031_controls
[] = {
452 .id
= V4L2_CID_VFLIP
,
453 .type
= V4L2_CTRL_TYPE_BOOLEAN
,
454 .name
= "Flip Vertically",
460 .id
= V4L2_CID_HFLIP
,
461 .type
= V4L2_CTRL_TYPE_BOOLEAN
,
462 .name
= "Flip Horizontally",
469 .type
= V4L2_CTRL_TYPE_INTEGER
,
475 .flags
= V4L2_CTRL_FLAG_SLIDER
,
477 .id
= V4L2_CID_EXPOSURE
,
478 .type
= V4L2_CTRL_TYPE_INTEGER
,
483 .default_value
= 255,
484 .flags
= V4L2_CTRL_FLAG_SLIDER
,
486 .id
= V4L2_CID_EXPOSURE_AUTO
,
487 .type
= V4L2_CTRL_TYPE_BOOLEAN
,
488 .name
= "Automatic Exposure",
496 static int mt9t031_get_control(struct soc_camera_device
*, struct v4l2_control
*);
497 static int mt9t031_set_control(struct soc_camera_device
*, struct v4l2_control
*);
499 static struct soc_camera_ops mt9t031_ops
= {
500 .owner
= THIS_MODULE
,
501 .init
= mt9t031_init
,
502 .release
= mt9t031_release
,
503 .start_capture
= mt9t031_start_capture
,
504 .stop_capture
= mt9t031_stop_capture
,
505 .set_crop
= mt9t031_set_crop
,
506 .set_fmt
= mt9t031_set_fmt
,
507 .try_fmt
= mt9t031_try_fmt
,
508 .set_bus_param
= mt9t031_set_bus_param
,
509 .query_bus_param
= mt9t031_query_bus_param
,
510 .controls
= mt9t031_controls
,
511 .num_controls
= ARRAY_SIZE(mt9t031_controls
),
512 .get_control
= mt9t031_get_control
,
513 .set_control
= mt9t031_set_control
,
514 .get_chip_id
= mt9t031_get_chip_id
,
515 #ifdef CONFIG_VIDEO_ADV_DEBUG
516 .get_register
= mt9t031_get_register
,
517 .set_register
= mt9t031_set_register
,
521 static int mt9t031_get_control(struct soc_camera_device
*icd
, struct v4l2_control
*ctrl
)
523 struct i2c_client
*client
= to_i2c_client(to_soc_camera_control(icd
));
524 struct mt9t031
*mt9t031
= i2c_get_clientdata(client
);
529 data
= reg_read(client
, MT9T031_READ_MODE_2
);
532 ctrl
->value
= !!(data
& 0x8000);
535 data
= reg_read(client
, MT9T031_READ_MODE_2
);
538 ctrl
->value
= !!(data
& 0x4000);
540 case V4L2_CID_EXPOSURE_AUTO
:
541 ctrl
->value
= mt9t031
->autoexposure
;
547 static int mt9t031_set_control(struct soc_camera_device
*icd
, struct v4l2_control
*ctrl
)
549 struct i2c_client
*client
= to_i2c_client(to_soc_camera_control(icd
));
550 struct mt9t031
*mt9t031
= i2c_get_clientdata(client
);
551 const struct v4l2_queryctrl
*qctrl
;
554 qctrl
= soc_camera_find_qctrl(&mt9t031_ops
, ctrl
->id
);
562 data
= reg_set(client
, MT9T031_READ_MODE_2
, 0x8000);
564 data
= reg_clear(client
, MT9T031_READ_MODE_2
, 0x8000);
570 data
= reg_set(client
, MT9T031_READ_MODE_2
, 0x4000);
572 data
= reg_clear(client
, MT9T031_READ_MODE_2
, 0x4000);
577 if (ctrl
->value
> qctrl
->maximum
|| ctrl
->value
< qctrl
->minimum
)
579 /* See Datasheet Table 7, Gain settings. */
580 if (ctrl
->value
<= qctrl
->default_value
) {
581 /* Pack it into 0..1 step 0.125, register values 0..8 */
582 unsigned long range
= qctrl
->default_value
- qctrl
->minimum
;
583 data
= ((ctrl
->value
- qctrl
->minimum
) * 8 + range
/ 2) / range
;
585 dev_dbg(&icd
->dev
, "Setting gain %d\n", data
);
586 data
= reg_write(client
, MT9T031_GLOBAL_GAIN
, data
);
590 /* Pack it into 1.125..128 variable step, register values 9..0x7860 */
591 /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
592 unsigned long range
= qctrl
->maximum
- qctrl
->default_value
- 1;
593 /* calculated gain: map 65..127 to 9..1024 step 0.125 */
594 unsigned long gain
= ((ctrl
->value
- qctrl
->default_value
- 1) *
595 1015 + range
/ 2) / range
+ 9;
597 if (gain
<= 32) /* calculated gain 9..32 -> 9..32 */
599 else if (gain
<= 64) /* calculated gain 33..64 -> 0x51..0x60 */
600 data
= ((gain
- 32) * 16 + 16) / 32 + 80;
602 /* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */
603 data
= (((gain
- 64 + 7) * 32) & 0xff00) | 0x60;
605 dev_dbg(&icd
->dev
, "Setting gain from 0x%x to 0x%x\n",
606 reg_read(client
, MT9T031_GLOBAL_GAIN
), data
);
607 data
= reg_write(client
, MT9T031_GLOBAL_GAIN
, data
);
613 icd
->gain
= ctrl
->value
;
615 case V4L2_CID_EXPOSURE
:
616 /* mt9t031 has maximum == default */
617 if (ctrl
->value
> qctrl
->maximum
|| ctrl
->value
< qctrl
->minimum
)
620 const unsigned long range
= qctrl
->maximum
- qctrl
->minimum
;
621 const u32 shutter
= ((ctrl
->value
- qctrl
->minimum
) * 1048 +
622 range
/ 2) / range
+ 1;
625 get_shutter(client
, &old
);
626 dev_dbg(&icd
->dev
, "Setting shutter width from %u to %u\n",
628 if (set_shutter(client
, shutter
) < 0)
630 icd
->exposure
= ctrl
->value
;
631 mt9t031
->autoexposure
= 0;
634 case V4L2_CID_EXPOSURE_AUTO
:
636 const u16 vblank
= MT9T031_VERTICAL_BLANK
;
637 const u32 shutter_max
= MT9T031_MAX_HEIGHT
+ vblank
;
638 if (set_shutter(client
, icd
->height
+
639 icd
->y_skip_top
+ vblank
) < 0)
641 qctrl
= soc_camera_find_qctrl(icd
->ops
, V4L2_CID_EXPOSURE
);
642 icd
->exposure
= (shutter_max
/ 2 + (icd
->height
+
643 icd
->y_skip_top
+ vblank
- 1) *
644 (qctrl
->maximum
- qctrl
->minimum
)) /
645 shutter_max
+ qctrl
->minimum
;
646 mt9t031
->autoexposure
= 1;
648 mt9t031
->autoexposure
= 0;
654 /* Interface active, can use i2c. If it fails, it can indeed mean, that
655 * this wasn't our capture interface, so, we wait for the right one */
656 static int mt9t031_video_probe(struct soc_camera_device
*icd
,
657 struct i2c_client
*client
)
659 struct mt9t031
*mt9t031
= i2c_get_clientdata(client
);
663 /* We must have a parent by now. And it cannot be a wrong one.
664 * So this entire test is completely redundant. */
665 if (!icd
->dev
.parent
||
666 to_soc_camera_host(icd
->dev
.parent
)->nr
!= icd
->iface
)
669 /* Switch master clock on */
670 ret
= soc_camera_video_start(icd
, &client
->dev
);
674 /* Enable the chip */
675 data
= reg_write(client
, MT9T031_CHIP_ENABLE
, 1);
676 dev_dbg(&icd
->dev
, "write: %d\n", data
);
678 /* Read out the chip version register */
679 data
= reg_read(client
, MT9T031_CHIP_VERSION
);
681 soc_camera_video_stop(icd
);
685 mt9t031
->model
= V4L2_IDENT_MT9T031
;
686 icd
->formats
= mt9t031_colour_formats
;
687 icd
->num_formats
= ARRAY_SIZE(mt9t031_colour_formats
);
691 "No MT9T031 chip detected, register read %x\n", data
);
695 dev_info(&icd
->dev
, "Detected a MT9T031 chip ID %x\n", data
);
700 static int mt9t031_probe(struct i2c_client
*client
,
701 const struct i2c_device_id
*did
)
703 struct mt9t031
*mt9t031
;
704 struct soc_camera_device
*icd
= client
->dev
.platform_data
;
705 struct i2c_adapter
*adapter
= to_i2c_adapter(client
->dev
.parent
);
706 struct soc_camera_link
*icl
;
710 dev_err(&client
->dev
, "MT9T031: missing soc-camera data!\n");
714 icl
= to_soc_camera_link(icd
);
716 dev_err(&client
->dev
, "MT9T031 driver needs platform data\n");
720 if (!i2c_check_functionality(adapter
, I2C_FUNC_SMBUS_WORD_DATA
)) {
721 dev_warn(&adapter
->dev
,
722 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
726 mt9t031
= kzalloc(sizeof(struct mt9t031
), GFP_KERNEL
);
730 i2c_set_clientdata(client
, mt9t031
);
732 /* Second stage probe - when a capture adapter is there */
733 icd
->ops
= &mt9t031_ops
;
734 icd
->x_min
= MT9T031_COLUMN_SKIP
;
735 icd
->y_min
= MT9T031_ROW_SKIP
;
736 icd
->x_current
= icd
->x_min
;
737 icd
->y_current
= icd
->y_min
;
738 icd
->width_min
= MT9T031_MIN_WIDTH
;
739 icd
->width_max
= MT9T031_MAX_WIDTH
;
740 icd
->height_min
= MT9T031_MIN_HEIGHT
;
741 icd
->height_max
= MT9T031_MAX_HEIGHT
;
743 /* Simulated autoexposure. If enabled, we calculate shutter width
744 * ourselves in the driver based on vertical blanking and frame width */
745 mt9t031
->autoexposure
= 1;
750 ret
= mt9t031_video_probe(icd
, client
);
753 i2c_set_clientdata(client
, NULL
);
760 static int mt9t031_remove(struct i2c_client
*client
)
762 struct mt9t031
*mt9t031
= i2c_get_clientdata(client
);
763 struct soc_camera_device
*icd
= client
->dev
.platform_data
;
766 i2c_set_clientdata(client
, NULL
);
767 client
->driver
= NULL
;
773 static const struct i2c_device_id mt9t031_id
[] = {
777 MODULE_DEVICE_TABLE(i2c
, mt9t031_id
);
779 static struct i2c_driver mt9t031_i2c_driver
= {
783 .probe
= mt9t031_probe
,
784 .remove
= mt9t031_remove
,
785 .id_table
= mt9t031_id
,
788 static int __init
mt9t031_mod_init(void)
790 return i2c_add_driver(&mt9t031_i2c_driver
);
793 static void __exit
mt9t031_mod_exit(void)
795 i2c_del_driver(&mt9t031_i2c_driver
);
798 module_init(mt9t031_mod_init
);
799 module_exit(mt9t031_mod_exit
);
801 MODULE_DESCRIPTION("Micron MT9T031 Camera driver");
802 MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>");
803 MODULE_LICENSE("GPL v2");