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sh_eth: fix EESIPR values for SH77{34|63}
[linux/fpc-iii.git] / drivers / media / i2c / soc_camera / mt9t031.c
blob3aa5569065ad0041c0aae79f8cdccc80bc8e539b
1 /*
2 * Driver for MT9T031 CMOS Image Sensor from Micron
3 *
4 * Copyright (C) 2008, Guennadi Liakhovetski, DENX Software Engineering <lg@denx.de>
5 *
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.
9 */
10
11 #include <linux/device.h>
12 #include <linux/i2c.h>
13 #include <linux/log2.h>
14 #include <linux/pm.h>
15 #include <linux/slab.h>
16 #include <linux/v4l2-mediabus.h>
17 #include <linux/videodev2.h>
18 #include <linux/module.h>
19
20 #include <media/soc_camera.h>
21 #include <media/v4l2-clk.h>
22 #include <media/v4l2-subdev.h>
23 #include <media/v4l2-ctrls.h>
24
25 /*
26 * ATTENTION: this driver still cannot be used outside of the soc-camera
27 * framework because of its PM implementation, using the video_device node.
28 * If hardware becomes available for testing, alternative PM approaches shall
29 * be considered and tested.
30 */
31
32 /*
33 * mt9t031 i2c address 0x5d
34 * The platform has to define struct i2c_board_info objects and link to them
35 * from struct soc_camera_host_desc
36 */
37
38 /* mt9t031 selected register addresses */
39 #define MT9T031_CHIP_VERSION 0x00
40 #define MT9T031_ROW_START 0x01
41 #define MT9T031_COLUMN_START 0x02
42 #define MT9T031_WINDOW_HEIGHT 0x03
43 #define MT9T031_WINDOW_WIDTH 0x04
44 #define MT9T031_HORIZONTAL_BLANKING 0x05
45 #define MT9T031_VERTICAL_BLANKING 0x06
46 #define MT9T031_OUTPUT_CONTROL 0x07
47 #define MT9T031_SHUTTER_WIDTH_UPPER 0x08
48 #define MT9T031_SHUTTER_WIDTH 0x09
49 #define MT9T031_PIXEL_CLOCK_CONTROL 0x0a
50 #define MT9T031_FRAME_RESTART 0x0b
51 #define MT9T031_SHUTTER_DELAY 0x0c
52 #define MT9T031_RESET 0x0d
53 #define MT9T031_READ_MODE_1 0x1e
54 #define MT9T031_READ_MODE_2 0x20
55 #define MT9T031_READ_MODE_3 0x21
56 #define MT9T031_ROW_ADDRESS_MODE 0x22
57 #define MT9T031_COLUMN_ADDRESS_MODE 0x23
58 #define MT9T031_GLOBAL_GAIN 0x35
59 #define MT9T031_CHIP_ENABLE 0xF8
60
61 #define MT9T031_MAX_HEIGHT 1536
62 #define MT9T031_MAX_WIDTH 2048
63 #define MT9T031_MIN_HEIGHT 2
64 #define MT9T031_MIN_WIDTH 18
65 #define MT9T031_HORIZONTAL_BLANK 142
66 #define MT9T031_VERTICAL_BLANK 25
67 #define MT9T031_COLUMN_SKIP 32
68 #define MT9T031_ROW_SKIP 20
69
70 struct mt9t031 {
71 struct v4l2_subdev subdev;
72 struct v4l2_ctrl_handler hdl;
73 struct {
74 /* exposure/auto-exposure cluster */
75 struct v4l2_ctrl *autoexposure;
76 struct v4l2_ctrl *exposure;
77 };
78 struct v4l2_rect rect; /* Sensor window */
79 struct v4l2_clk *clk;
80 u16 xskip;
81 u16 yskip;
82 unsigned int total_h;
83 unsigned short y_skip_top; /* Lines to skip at the top */
84 };
85
86 static struct mt9t031 *to_mt9t031(const struct i2c_client *client)
87 {
88 return container_of(i2c_get_clientdata(client), struct mt9t031, subdev);
89 }
90
91 static int reg_read(struct i2c_client *client, const u8 reg)
92 {
93 return i2c_smbus_read_word_swapped(client, reg);
94 }
95
96 static int reg_write(struct i2c_client *client, const u8 reg,
97 const u16 data)
98 {
99 return i2c_smbus_write_word_swapped(client, reg, data);
100 }
101
102 static int reg_set(struct i2c_client *client, const u8 reg,
103 const u16 data)
104 {
105 int ret;
106
107 ret = reg_read(client, reg);
108 if (ret < 0)
109 return ret;
110 return reg_write(client, reg, ret | data);
111 }
112
113 static int reg_clear(struct i2c_client *client, const u8 reg,
114 const u16 data)
115 {
116 int ret;
117
118 ret = reg_read(client, reg);
119 if (ret < 0)
120 return ret;
121 return reg_write(client, reg, ret & ~data);
122 }
123
124 static int set_shutter(struct i2c_client *client, const u32 data)
125 {
126 int ret;
127
128 ret = reg_write(client, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16);
129
130 if (ret >= 0)
131 ret = reg_write(client, MT9T031_SHUTTER_WIDTH, data & 0xffff);
132
133 return ret;
134 }
135
136 static int get_shutter(struct i2c_client *client, u32 *data)
137 {
138 int ret;
139
140 ret = reg_read(client, MT9T031_SHUTTER_WIDTH_UPPER);
141 *data = ret << 16;
142
143 if (ret >= 0)
144 ret = reg_read(client, MT9T031_SHUTTER_WIDTH);
145 *data |= ret & 0xffff;
146
147 return ret < 0 ? ret : 0;
148 }
149
150 static int mt9t031_idle(struct i2c_client *client)
151 {
152 int ret;
153
154 /* Disable chip output, synchronous option update */
155 ret = reg_write(client, MT9T031_RESET, 1);
156 if (ret >= 0)
157 ret = reg_write(client, MT9T031_RESET, 0);
158 if (ret >= 0)
159 ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2);
160
161 return ret >= 0 ? 0 : -EIO;
162 }
163
164 static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable)
165 {
166 struct i2c_client *client = v4l2_get_subdevdata(sd);
167 int ret;
168
169 if (enable)
170 /* Switch to master "normal" mode */
171 ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 2);
172 else
173 /* Stop sensor readout */
174 ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2);
175
176 if (ret < 0)
177 return -EIO;
178
179 return 0;
180 }
181
182 /* target must be _even_ */
183 static u16 mt9t031_skip(s32 *source, s32 target, s32 max)
184 {
185 unsigned int skip;
186
187 if (*source < target + target / 2) {
188 *source = target;
189 return 1;
190 }
191
192 skip = min(max, *source + target / 2) / target;
193 if (skip > 8)
194 skip = 8;
195 *source = target * skip;
196
197 return skip;
198 }
199
200 /* rect is the sensor rectangle, the caller guarantees parameter validity */
201 static int mt9t031_set_params(struct i2c_client *client,
202 struct v4l2_rect *rect, u16 xskip, u16 yskip)
203 {
204 struct mt9t031 *mt9t031 = to_mt9t031(client);
205 int ret;
206 u16 xbin, ybin;
207 const u16 hblank = MT9T031_HORIZONTAL_BLANK,
208 vblank = MT9T031_VERTICAL_BLANK;
209
210 xbin = min(xskip, (u16)3);
211 ybin = min(yskip, (u16)3);
212
213 /*
214 * Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper.
215 * There is always a valid suitably aligned value. The worst case is
216 * xbin = 3, width = 2048. Then we will start at 36, the last read out
217 * pixel will be 2083, which is < 2085 - first black pixel.
218 *
219 * MT9T031 datasheet imposes window left border alignment, depending on
220 * the selected xskip. Failing to conform to this requirement produces
221 * dark horizontal stripes in the image. However, even obeying to this
222 * requirement doesn't eliminate the stripes in all configurations. They
223 * appear "locally reproducibly," but can differ between tests under
224 * different lighting conditions.
225 */
226 switch (xbin) {
227 case 1:
228 rect->left &= ~1;
229 break;
230 case 2:
231 rect->left &= ~3;
232 break;
233 case 3:
234 rect->left = rect->left > roundup(MT9T031_COLUMN_SKIP, 6) ?
235 (rect->left / 6) * 6 : roundup(MT9T031_COLUMN_SKIP, 6);
236 }
237
238 rect->top &= ~1;
239
240 dev_dbg(&client->dev, "skip %u:%u, rect %ux%u@%u:%u\n",
241 xskip, yskip, rect->width, rect->height, rect->left, rect->top);
242
243 /* Disable register update, reconfigure atomically */
244 ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 1);
245 if (ret < 0)
246 return ret;
247
248 /* Blanking and start values - default... */
249 ret = reg_write(client, MT9T031_HORIZONTAL_BLANKING, hblank);
250 if (ret >= 0)
251 ret = reg_write(client, MT9T031_VERTICAL_BLANKING, vblank);
252
253 if (yskip != mt9t031->yskip || xskip != mt9t031->xskip) {
254 /* Binning, skipping */
255 if (ret >= 0)
256 ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE,
257 ((xbin - 1) << 4) | (xskip - 1));
258 if (ret >= 0)
259 ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE,
260 ((ybin - 1) << 4) | (yskip - 1));
261 }
262 dev_dbg(&client->dev, "new physical left %u, top %u\n",
263 rect->left, rect->top);
264
265 /*
266 * The caller provides a supported format, as guaranteed by
267 * .set_fmt(FORMAT_TRY), soc_camera_s_selection() and soc_camera_cropcap()
268 */
269 if (ret >= 0)
270 ret = reg_write(client, MT9T031_COLUMN_START, rect->left);
271 if (ret >= 0)
272 ret = reg_write(client, MT9T031_ROW_START, rect->top);
273 if (ret >= 0)
274 ret = reg_write(client, MT9T031_WINDOW_WIDTH, rect->width - 1);
275 if (ret >= 0)
276 ret = reg_write(client, MT9T031_WINDOW_HEIGHT,
277 rect->height + mt9t031->y_skip_top - 1);
278 if (ret >= 0 && v4l2_ctrl_g_ctrl(mt9t031->autoexposure) == V4L2_EXPOSURE_AUTO) {
279 mt9t031->total_h = rect->height + mt9t031->y_skip_top + vblank;
280
281 ret = set_shutter(client, mt9t031->total_h);
282 }
283
284 /* Re-enable register update, commit all changes */
285 if (ret >= 0)
286 ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 1);
287
288 if (ret >= 0) {
289 mt9t031->rect = *rect;
290 mt9t031->xskip = xskip;
291 mt9t031->yskip = yskip;
292 }
293
294 return ret < 0 ? ret : 0;
295 }
296
297 static int mt9t031_set_selection(struct v4l2_subdev *sd,
298 struct v4l2_subdev_pad_config *cfg,
299 struct v4l2_subdev_selection *sel)
300 {
301 struct i2c_client *client = v4l2_get_subdevdata(sd);
302 struct mt9t031 *mt9t031 = to_mt9t031(client);
303 struct v4l2_rect rect = sel->r;
304
305 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
306 sel->target != V4L2_SEL_TGT_CROP)
307 return -EINVAL;
308
309 rect.width = ALIGN(rect.width, 2);
310 rect.height = ALIGN(rect.height, 2);
311
312 soc_camera_limit_side(&rect.left, &rect.width,
313 MT9T031_COLUMN_SKIP, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH);
314
315 soc_camera_limit_side(&rect.top, &rect.height,
316 MT9T031_ROW_SKIP, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT);
317
318 return mt9t031_set_params(client, &rect, mt9t031->xskip, mt9t031->yskip);
319 }
320
321 static int mt9t031_get_selection(struct v4l2_subdev *sd,
322 struct v4l2_subdev_pad_config *cfg,
323 struct v4l2_subdev_selection *sel)
324 {
325 struct i2c_client *client = v4l2_get_subdevdata(sd);
326 struct mt9t031 *mt9t031 = to_mt9t031(client);
327
328 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
329 return -EINVAL;
330
331 switch (sel->target) {
332 case V4L2_SEL_TGT_CROP_BOUNDS:
333 case V4L2_SEL_TGT_CROP_DEFAULT:
334 sel->r.left = MT9T031_COLUMN_SKIP;
335 sel->r.top = MT9T031_ROW_SKIP;
336 sel->r.width = MT9T031_MAX_WIDTH;
337 sel->r.height = MT9T031_MAX_HEIGHT;
338 return 0;
339 case V4L2_SEL_TGT_CROP:
340 sel->r = mt9t031->rect;
341 return 0;
342 default:
343 return -EINVAL;
344 }
345 }
346
347 static int mt9t031_get_fmt(struct v4l2_subdev *sd,
348 struct v4l2_subdev_pad_config *cfg,
349 struct v4l2_subdev_format *format)
350 {
351 struct v4l2_mbus_framefmt *mf = &format->format;
352 struct i2c_client *client = v4l2_get_subdevdata(sd);
353 struct mt9t031 *mt9t031 = to_mt9t031(client);
354
355 if (format->pad)
356 return -EINVAL;
357
358 mf->width = mt9t031->rect.width / mt9t031->xskip;
359 mf->height = mt9t031->rect.height / mt9t031->yskip;
360 mf->code = MEDIA_BUS_FMT_SBGGR10_1X10;
361 mf->colorspace = V4L2_COLORSPACE_SRGB;
362 mf->field = V4L2_FIELD_NONE;
363
364 return 0;
365 }
366
367 /*
368 * If a user window larger than sensor window is requested, we'll increase the
369 * sensor window.
370 */
371 static int mt9t031_set_fmt(struct v4l2_subdev *sd,
372 struct v4l2_subdev_pad_config *cfg,
373 struct v4l2_subdev_format *format)
374 {
375 struct v4l2_mbus_framefmt *mf = &format->format;
376 struct i2c_client *client = v4l2_get_subdevdata(sd);
377 struct mt9t031 *mt9t031 = to_mt9t031(client);
378 u16 xskip, yskip;
379 struct v4l2_rect rect = mt9t031->rect;
380
381 if (format->pad)
382 return -EINVAL;
383
384 mf->code = MEDIA_BUS_FMT_SBGGR10_1X10;
385 mf->colorspace = V4L2_COLORSPACE_SRGB;
386 v4l_bound_align_image(
387 &mf->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1,
388 &mf->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0);
389
390 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
391 cfg->try_fmt = *mf;
392 return 0;
393 }
394
395 /*
396 * Width and height are within limits.
397 * S_FMT: use binning and skipping for scaling
398 */
399 xskip = mt9t031_skip(&rect.width, mf->width, MT9T031_MAX_WIDTH);
400 yskip = mt9t031_skip(&rect.height, mf->height, MT9T031_MAX_HEIGHT);
401
402 mf->code = MEDIA_BUS_FMT_SBGGR10_1X10;
403 mf->colorspace = V4L2_COLORSPACE_SRGB;
404
405 /* mt9t031_set_params() doesn't change width and height */
406 return mt9t031_set_params(client, &rect, xskip, yskip);
407 }
408
409 #ifdef CONFIG_VIDEO_ADV_DEBUG
410 static int mt9t031_g_register(struct v4l2_subdev *sd,
411 struct v4l2_dbg_register *reg)
412 {
413 struct i2c_client *client = v4l2_get_subdevdata(sd);
414
415 if (reg->reg > 0xff)
416 return -EINVAL;
417
418 reg->size = 1;
419 reg->val = reg_read(client, reg->reg);
420
421 if (reg->val > 0xffff)
422 return -EIO;
423
424 return 0;
425 }
426
427 static int mt9t031_s_register(struct v4l2_subdev *sd,
428 const struct v4l2_dbg_register *reg)
429 {
430 struct i2c_client *client = v4l2_get_subdevdata(sd);
431
432 if (reg->reg > 0xff)
433 return -EINVAL;
434
435 if (reg_write(client, reg->reg, reg->val) < 0)
436 return -EIO;
437
438 return 0;
439 }
440 #endif
441
442 static int mt9t031_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
443 {
444 struct mt9t031 *mt9t031 = container_of(ctrl->handler,
445 struct mt9t031, hdl);
446 const u32 shutter_max = MT9T031_MAX_HEIGHT + MT9T031_VERTICAL_BLANK;
447 s32 min, max;
448
449 switch (ctrl->id) {
450 case V4L2_CID_EXPOSURE_AUTO:
451 min = mt9t031->exposure->minimum;
452 max = mt9t031->exposure->maximum;
453 mt9t031->exposure->val =
454 (shutter_max / 2 + (mt9t031->total_h - 1) * (max - min))
455 / shutter_max + min;
456 break;
457 }
458 return 0;
459 }
460
461 static int mt9t031_s_ctrl(struct v4l2_ctrl *ctrl)
462 {
463 struct mt9t031 *mt9t031 = container_of(ctrl->handler,
464 struct mt9t031, hdl);
465 struct v4l2_subdev *sd = &mt9t031->subdev;
466 struct i2c_client *client = v4l2_get_subdevdata(sd);
467 struct v4l2_ctrl *exp = mt9t031->exposure;
468 int data;
469
470 switch (ctrl->id) {
471 case V4L2_CID_VFLIP:
472 if (ctrl->val)
473 data = reg_set(client, MT9T031_READ_MODE_2, 0x8000);
474 else
475 data = reg_clear(client, MT9T031_READ_MODE_2, 0x8000);
476 if (data < 0)
477 return -EIO;
478 return 0;
479 case V4L2_CID_HFLIP:
480 if (ctrl->val)
481 data = reg_set(client, MT9T031_READ_MODE_2, 0x4000);
482 else
483 data = reg_clear(client, MT9T031_READ_MODE_2, 0x4000);
484 if (data < 0)
485 return -EIO;
486 return 0;
487 case V4L2_CID_GAIN:
488 /* See Datasheet Table 7, Gain settings. */
489 if (ctrl->val <= ctrl->default_value) {
490 /* Pack it into 0..1 step 0.125, register values 0..8 */
491 unsigned long range = ctrl->default_value - ctrl->minimum;
492 data = ((ctrl->val - (s32)ctrl->minimum) * 8 + range / 2) / range;
493
494 dev_dbg(&client->dev, "Setting gain %d\n", data);
495 data = reg_write(client, MT9T031_GLOBAL_GAIN, data);
496 if (data < 0)
497 return -EIO;
498 } else {
499 /* Pack it into 1.125..128 variable step, register values 9..0x7860 */
500 /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
501 unsigned long range = ctrl->maximum - ctrl->default_value - 1;
502 /* calculated gain: map 65..127 to 9..1024 step 0.125 */
503 unsigned long gain = ((ctrl->val - (s32)ctrl->default_value - 1) *
504 1015 + range / 2) / range + 9;
505
506 if (gain <= 32) /* calculated gain 9..32 -> 9..32 */
507 data = gain;
508 else if (gain <= 64) /* calculated gain 33..64 -> 0x51..0x60 */
509 data = ((gain - 32) * 16 + 16) / 32 + 80;
510 else
511 /* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */
512 data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60;
513
514 dev_dbg(&client->dev, "Set gain from 0x%x to 0x%x\n",
515 reg_read(client, MT9T031_GLOBAL_GAIN), data);
516 data = reg_write(client, MT9T031_GLOBAL_GAIN, data);
517 if (data < 0)
518 return -EIO;
519 }
520 return 0;
521
522 case V4L2_CID_EXPOSURE_AUTO:
523 if (ctrl->val == V4L2_EXPOSURE_MANUAL) {
524 unsigned int range = exp->maximum - exp->minimum;
525 unsigned int shutter = ((exp->val - (s32)exp->minimum) * 1048 +
526 range / 2) / range + 1;
527 u32 old;
528
529 get_shutter(client, &old);
530 dev_dbg(&client->dev, "Set shutter from %u to %u\n",
531 old, shutter);
532 if (set_shutter(client, shutter) < 0)
533 return -EIO;
534 } else {
535 const u16 vblank = MT9T031_VERTICAL_BLANK;
536 mt9t031->total_h = mt9t031->rect.height +
537 mt9t031->y_skip_top + vblank;
538
539 if (set_shutter(client, mt9t031->total_h) < 0)
540 return -EIO;
541 }
542 return 0;
543 default:
544 return -EINVAL;
545 }
546 return 0;
547 }
548
549 /*
550 * Power Management:
551 * This function does nothing for now but must be present for pm to work
552 */
553 static int mt9t031_runtime_suspend(struct device *dev)
554 {
555 return 0;
556 }
557
558 /*
559 * Power Management:
560 * COLUMN_ADDRESS_MODE and ROW_ADDRESS_MODE are not rewritten if unchanged
561 * they are however changed at reset if the platform hook is present
562 * thus we rewrite them with the values stored by the driver
563 */
564 static int mt9t031_runtime_resume(struct device *dev)
565 {
566 struct video_device *vdev = to_video_device(dev);
567 struct v4l2_subdev *sd = soc_camera_vdev_to_subdev(vdev);
568 struct i2c_client *client = v4l2_get_subdevdata(sd);
569 struct mt9t031 *mt9t031 = to_mt9t031(client);
570
571 int ret;
572 u16 xbin, ybin;
573
574 xbin = min(mt9t031->xskip, (u16)3);
575 ybin = min(mt9t031->yskip, (u16)3);
576
577 ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE,
578 ((xbin - 1) << 4) | (mt9t031->xskip - 1));
579 if (ret < 0)
580 return ret;
581
582 ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE,
583 ((ybin - 1) << 4) | (mt9t031->yskip - 1));
584 if (ret < 0)
585 return ret;
586
587 return 0;
588 }
589
590 static const struct dev_pm_ops mt9t031_dev_pm_ops = {
591 .runtime_suspend = mt9t031_runtime_suspend,
592 .runtime_resume = mt9t031_runtime_resume,
593 };
594
595 static struct device_type mt9t031_dev_type = {
596 .name = "MT9T031",
597 .pm = &mt9t031_dev_pm_ops,
598 };
599
600 static int mt9t031_s_power(struct v4l2_subdev *sd, int on)
601 {
602 struct i2c_client *client = v4l2_get_subdevdata(sd);
603 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
604 struct video_device *vdev = soc_camera_i2c_to_vdev(client);
605 struct mt9t031 *mt9t031 = to_mt9t031(client);
606 int ret;
607
608 if (on) {
609 ret = soc_camera_power_on(&client->dev, ssdd, mt9t031->clk);
610 if (ret < 0)
611 return ret;
612 if (vdev)
613 /* Not needed during probing, when vdev isn't available yet */
614 vdev->dev.type = &mt9t031_dev_type;
615 } else {
616 if (vdev)
617 vdev->dev.type = NULL;
618 soc_camera_power_off(&client->dev, ssdd, mt9t031->clk);
619 }
620
621 return 0;
622 }
623
624 /*
625 * Interface active, can use i2c. If it fails, it can indeed mean, that
626 * this wasn't our capture interface, so, we wait for the right one
627 */
628 static int mt9t031_video_probe(struct i2c_client *client)
629 {
630 struct mt9t031 *mt9t031 = to_mt9t031(client);
631 s32 data;
632 int ret;
633
634 ret = mt9t031_s_power(&mt9t031->subdev, 1);
635 if (ret < 0)
636 return ret;
637
638 ret = mt9t031_idle(client);
639 if (ret < 0) {
640 dev_err(&client->dev, "Failed to initialise the camera\n");
641 goto done;
642 }
643
644 /* Read out the chip version register */
645 data = reg_read(client, MT9T031_CHIP_VERSION);
646
647 switch (data) {
648 case 0x1621:
649 break;
650 default:
651 dev_err(&client->dev,
652 "No MT9T031 chip detected, register read %x\n", data);
653 ret = -ENODEV;
654 goto done;
655 }
656
657 dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data);
658
659 ret = v4l2_ctrl_handler_setup(&mt9t031->hdl);
660
661 done:
662 mt9t031_s_power(&mt9t031->subdev, 0);
663
664 return ret;
665 }
666
667 static int mt9t031_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
668 {
669 struct i2c_client *client = v4l2_get_subdevdata(sd);
670 struct mt9t031 *mt9t031 = to_mt9t031(client);
671
672 *lines = mt9t031->y_skip_top;
673
674 return 0;
675 }
676
677 static const struct v4l2_ctrl_ops mt9t031_ctrl_ops = {
678 .g_volatile_ctrl = mt9t031_g_volatile_ctrl,
679 .s_ctrl = mt9t031_s_ctrl,
680 };
681
682 static struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = {
683 .s_power = mt9t031_s_power,
684 #ifdef CONFIG_VIDEO_ADV_DEBUG
685 .g_register = mt9t031_g_register,
686 .s_register = mt9t031_s_register,
687 #endif
688 };
689
690 static int mt9t031_enum_mbus_code(struct v4l2_subdev *sd,
691 struct v4l2_subdev_pad_config *cfg,
692 struct v4l2_subdev_mbus_code_enum *code)
693 {
694 if (code->pad || code->index)
695 return -EINVAL;
696
697 code->code = MEDIA_BUS_FMT_SBGGR10_1X10;
698 return 0;
699 }
700
701 static int mt9t031_g_mbus_config(struct v4l2_subdev *sd,
702 struct v4l2_mbus_config *cfg)
703 {
704 struct i2c_client *client = v4l2_get_subdevdata(sd);
705 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
706
707 cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_PCLK_SAMPLE_RISING |
708 V4L2_MBUS_PCLK_SAMPLE_FALLING | V4L2_MBUS_HSYNC_ACTIVE_HIGH |
709 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_DATA_ACTIVE_HIGH;
710 cfg->type = V4L2_MBUS_PARALLEL;
711 cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
712
713 return 0;
714 }
715
716 static int mt9t031_s_mbus_config(struct v4l2_subdev *sd,
717 const struct v4l2_mbus_config *cfg)
718 {
719 struct i2c_client *client = v4l2_get_subdevdata(sd);
720 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
721
722 if (soc_camera_apply_board_flags(ssdd, cfg) &
723 V4L2_MBUS_PCLK_SAMPLE_FALLING)
724 return reg_clear(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000);
725 else
726 return reg_set(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000);
727 }
728
729 static struct v4l2_subdev_video_ops mt9t031_subdev_video_ops = {
730 .s_stream = mt9t031_s_stream,
731 .g_mbus_config = mt9t031_g_mbus_config,
732 .s_mbus_config = mt9t031_s_mbus_config,
733 };
734
735 static const struct v4l2_subdev_sensor_ops mt9t031_subdev_sensor_ops = {
736 .g_skip_top_lines = mt9t031_g_skip_top_lines,
737 };
738
739 static const struct v4l2_subdev_pad_ops mt9t031_subdev_pad_ops = {
740 .enum_mbus_code = mt9t031_enum_mbus_code,
741 .get_selection = mt9t031_get_selection,
742 .set_selection = mt9t031_set_selection,
743 .get_fmt = mt9t031_get_fmt,
744 .set_fmt = mt9t031_set_fmt,
745 };
746
747 static struct v4l2_subdev_ops mt9t031_subdev_ops = {
748 .core = &mt9t031_subdev_core_ops,
749 .video = &mt9t031_subdev_video_ops,
750 .sensor = &mt9t031_subdev_sensor_ops,
751 .pad = &mt9t031_subdev_pad_ops,
752 };
753
754 static int mt9t031_probe(struct i2c_client *client,
755 const struct i2c_device_id *did)
756 {
757 struct mt9t031 *mt9t031;
758 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
759 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
760 int ret;
761
762 if (!ssdd) {
763 dev_err(&client->dev, "MT9T031 driver needs platform data\n");
764 return -EINVAL;
765 }
766
767 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
768 dev_warn(&adapter->dev,
769 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
770 return -EIO;
771 }
772
773 mt9t031 = devm_kzalloc(&client->dev, sizeof(struct mt9t031), GFP_KERNEL);
774 if (!mt9t031)
775 return -ENOMEM;
776
777 v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops);
778 v4l2_ctrl_handler_init(&mt9t031->hdl, 5);
779 v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
780 V4L2_CID_VFLIP, 0, 1, 1, 0);
781 v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
782 V4L2_CID_HFLIP, 0, 1, 1, 0);
783 v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
784 V4L2_CID_GAIN, 0, 127, 1, 64);
785
786 /*
787 * Simulated autoexposure. If enabled, we calculate shutter width
788 * ourselves in the driver based on vertical blanking and frame width
789 */
790 mt9t031->autoexposure = v4l2_ctrl_new_std_menu(&mt9t031->hdl,
791 &mt9t031_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
792 V4L2_EXPOSURE_AUTO);
793 mt9t031->exposure = v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
794 V4L2_CID_EXPOSURE, 1, 255, 1, 255);
795
796 mt9t031->subdev.ctrl_handler = &mt9t031->hdl;
797 if (mt9t031->hdl.error)
798 return mt9t031->hdl.error;
799
800 v4l2_ctrl_auto_cluster(2, &mt9t031->autoexposure,
801 V4L2_EXPOSURE_MANUAL, true);
802
803 mt9t031->y_skip_top = 0;
804 mt9t031->rect.left = MT9T031_COLUMN_SKIP;
805 mt9t031->rect.top = MT9T031_ROW_SKIP;
806 mt9t031->rect.width = MT9T031_MAX_WIDTH;
807 mt9t031->rect.height = MT9T031_MAX_HEIGHT;
808
809 mt9t031->xskip = 1;
810 mt9t031->yskip = 1;
811
812 mt9t031->clk = v4l2_clk_get(&client->dev, "mclk");
813 if (IS_ERR(mt9t031->clk)) {
814 ret = PTR_ERR(mt9t031->clk);
815 goto eclkget;
816 }
817
818 ret = mt9t031_video_probe(client);
819 if (ret) {
820 v4l2_clk_put(mt9t031->clk);
821 eclkget:
822 v4l2_ctrl_handler_free(&mt9t031->hdl);
823 }
824
825 return ret;
826 }
827
828 static int mt9t031_remove(struct i2c_client *client)
829 {
830 struct mt9t031 *mt9t031 = to_mt9t031(client);
831
832 v4l2_clk_put(mt9t031->clk);
833 v4l2_device_unregister_subdev(&mt9t031->subdev);
834 v4l2_ctrl_handler_free(&mt9t031->hdl);
835
836 return 0;
837 }
838
839 static const struct i2c_device_id mt9t031_id[] = {
840 { "mt9t031", 0 },
841 { }
842 };
843 MODULE_DEVICE_TABLE(i2c, mt9t031_id);
844
845 static struct i2c_driver mt9t031_i2c_driver = {
846 .driver = {
847 .name = "mt9t031",
848 },
849 .probe = mt9t031_probe,
850 .remove = mt9t031_remove,
851 .id_table = mt9t031_id,
852 };
853
854 module_i2c_driver(mt9t031_i2c_driver);
855
856 MODULE_DESCRIPTION("Micron MT9T031 Camera driver");
857 MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>");
858 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support