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[media] V4L: soc-camera: start removing struct soc_camera_device from client drivers
[GitHub/moto-9609/android_kernel_motorola_exynos9610.git] / drivers / media / video / mt9t031.c
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/videodev2.h>
17
18 #include <media/soc_camera.h>
19 #include <media/soc_mediabus.h>
20 #include <media/v4l2-chip-ident.h>
21 #include <media/v4l2-subdev.h>
22 #include <media/v4l2-ctrls.h>
23
24 /*
25 * mt9t031 i2c address 0x5d
26 * The platform has to define i2c_board_info and link to it from
27 * struct soc_camera_link
28 */
29
30 /* mt9t031 selected register addresses */
31 #define MT9T031_CHIP_VERSION 0x00
32 #define MT9T031_ROW_START 0x01
33 #define MT9T031_COLUMN_START 0x02
34 #define MT9T031_WINDOW_HEIGHT 0x03
35 #define MT9T031_WINDOW_WIDTH 0x04
36 #define MT9T031_HORIZONTAL_BLANKING 0x05
37 #define MT9T031_VERTICAL_BLANKING 0x06
38 #define MT9T031_OUTPUT_CONTROL 0x07
39 #define MT9T031_SHUTTER_WIDTH_UPPER 0x08
40 #define MT9T031_SHUTTER_WIDTH 0x09
41 #define MT9T031_PIXEL_CLOCK_CONTROL 0x0a
42 #define MT9T031_FRAME_RESTART 0x0b
43 #define MT9T031_SHUTTER_DELAY 0x0c
44 #define MT9T031_RESET 0x0d
45 #define MT9T031_READ_MODE_1 0x1e
46 #define MT9T031_READ_MODE_2 0x20
47 #define MT9T031_READ_MODE_3 0x21
48 #define MT9T031_ROW_ADDRESS_MODE 0x22
49 #define MT9T031_COLUMN_ADDRESS_MODE 0x23
50 #define MT9T031_GLOBAL_GAIN 0x35
51 #define MT9T031_CHIP_ENABLE 0xF8
52
53 #define MT9T031_MAX_HEIGHT 1536
54 #define MT9T031_MAX_WIDTH 2048
55 #define MT9T031_MIN_HEIGHT 2
56 #define MT9T031_MIN_WIDTH 18
57 #define MT9T031_HORIZONTAL_BLANK 142
58 #define MT9T031_VERTICAL_BLANK 25
59 #define MT9T031_COLUMN_SKIP 32
60 #define MT9T031_ROW_SKIP 20
61
62 struct mt9t031 {
63 struct v4l2_subdev subdev;
64 struct v4l2_ctrl_handler hdl;
65 struct {
66 /* exposure/auto-exposure cluster */
67 struct v4l2_ctrl *autoexposure;
68 struct v4l2_ctrl *exposure;
69 };
70 struct v4l2_rect rect; /* Sensor window */
71 int model; /* V4L2_IDENT_MT9T031* codes from v4l2-chip-ident.h */
72 u16 xskip;
73 u16 yskip;
74 unsigned int total_h;
75 unsigned short y_skip_top; /* Lines to skip at the top */
76 };
77
78 static struct mt9t031 *to_mt9t031(const struct i2c_client *client)
79 {
80 return container_of(i2c_get_clientdata(client), struct mt9t031, subdev);
81 }
82
83 static int reg_read(struct i2c_client *client, const u8 reg)
84 {
85 s32 data = i2c_smbus_read_word_data(client, reg);
86 return data < 0 ? data : swab16(data);
87 }
88
89 static int reg_write(struct i2c_client *client, const u8 reg,
90 const u16 data)
91 {
92 return i2c_smbus_write_word_data(client, reg, swab16(data));
93 }
94
95 static int reg_set(struct i2c_client *client, const u8 reg,
96 const u16 data)
97 {
98 int ret;
99
100 ret = reg_read(client, reg);
101 if (ret < 0)
102 return ret;
103 return reg_write(client, reg, ret | data);
104 }
105
106 static int reg_clear(struct i2c_client *client, const u8 reg,
107 const u16 data)
108 {
109 int ret;
110
111 ret = reg_read(client, reg);
112 if (ret < 0)
113 return ret;
114 return reg_write(client, reg, ret & ~data);
115 }
116
117 static int set_shutter(struct i2c_client *client, const u32 data)
118 {
119 int ret;
120
121 ret = reg_write(client, MT9T031_SHUTTER_WIDTH_UPPER, data >> 16);
122
123 if (ret >= 0)
124 ret = reg_write(client, MT9T031_SHUTTER_WIDTH, data & 0xffff);
125
126 return ret;
127 }
128
129 static int get_shutter(struct i2c_client *client, u32 *data)
130 {
131 int ret;
132
133 ret = reg_read(client, MT9T031_SHUTTER_WIDTH_UPPER);
134 *data = ret << 16;
135
136 if (ret >= 0)
137 ret = reg_read(client, MT9T031_SHUTTER_WIDTH);
138 *data |= ret & 0xffff;
139
140 return ret < 0 ? ret : 0;
141 }
142
143 static int mt9t031_idle(struct i2c_client *client)
144 {
145 int ret;
146
147 /* Disable chip output, synchronous option update */
148 ret = reg_write(client, MT9T031_RESET, 1);
149 if (ret >= 0)
150 ret = reg_write(client, MT9T031_RESET, 0);
151 if (ret >= 0)
152 ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2);
153
154 return ret >= 0 ? 0 : -EIO;
155 }
156
157 static int mt9t031_disable(struct i2c_client *client)
158 {
159 /* Disable the chip */
160 reg_clear(client, MT9T031_OUTPUT_CONTROL, 2);
161
162 return 0;
163 }
164
165 static int mt9t031_s_stream(struct v4l2_subdev *sd, int enable)
166 {
167 struct i2c_client *client = v4l2_get_subdevdata(sd);
168 int ret;
169
170 if (enable)
171 /* Switch to master "normal" mode */
172 ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 2);
173 else
174 /* Stop sensor readout */
175 ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 2);
176
177 if (ret < 0)
178 return -EIO;
179
180 return 0;
181 }
182
183 /* target must be _even_ */
184 static u16 mt9t031_skip(s32 *source, s32 target, s32 max)
185 {
186 unsigned int skip;
187
188 if (*source < target + target / 2) {
189 *source = target;
190 return 1;
191 }
192
193 skip = min(max, *source + target / 2) / target;
194 if (skip > 8)
195 skip = 8;
196 *source = target * skip;
197
198 return skip;
199 }
200
201 /* rect is the sensor rectangle, the caller guarantees parameter validity */
202 static int mt9t031_set_params(struct i2c_client *client,
203 struct v4l2_rect *rect, u16 xskip, u16 yskip)
204 {
205 struct mt9t031 *mt9t031 = to_mt9t031(client);
206 int ret;
207 u16 xbin, ybin;
208 const u16 hblank = MT9T031_HORIZONTAL_BLANK,
209 vblank = MT9T031_VERTICAL_BLANK;
210
211 xbin = min(xskip, (u16)3);
212 ybin = min(yskip, (u16)3);
213
214 /*
215 * Could just do roundup(rect->left, [xy]bin * 2); but this is cheaper.
216 * There is always a valid suitably aligned value. The worst case is
217 * xbin = 3, width = 2048. Then we will start at 36, the last read out
218 * pixel will be 2083, which is < 2085 - first black pixel.
219 *
220 * MT9T031 datasheet imposes window left border alignment, depending on
221 * the selected xskip. Failing to conform to this requirement produces
222 * dark horizontal stripes in the image. However, even obeying to this
223 * requirement doesn't eliminate the stripes in all configurations. They
224 * appear "locally reproducibly," but can differ between tests under
225 * different lighting conditions.
226 */
227 switch (xbin) {
228 case 1:
229 rect->left &= ~1;
230 break;
231 case 2:
232 rect->left &= ~3;
233 break;
234 case 3:
235 rect->left = rect->left > roundup(MT9T031_COLUMN_SKIP, 6) ?
236 (rect->left / 6) * 6 : roundup(MT9T031_COLUMN_SKIP, 6);
237 }
238
239 rect->top &= ~1;
240
241 dev_dbg(&client->dev, "skip %u:%u, rect %ux%u@%u:%u\n",
242 xskip, yskip, rect->width, rect->height, rect->left, rect->top);
243
244 /* Disable register update, reconfigure atomically */
245 ret = reg_set(client, MT9T031_OUTPUT_CONTROL, 1);
246 if (ret < 0)
247 return ret;
248
249 /* Blanking and start values - default... */
250 ret = reg_write(client, MT9T031_HORIZONTAL_BLANKING, hblank);
251 if (ret >= 0)
252 ret = reg_write(client, MT9T031_VERTICAL_BLANKING, vblank);
253
254 if (yskip != mt9t031->yskip || xskip != mt9t031->xskip) {
255 /* Binning, skipping */
256 if (ret >= 0)
257 ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE,
258 ((xbin - 1) << 4) | (xskip - 1));
259 if (ret >= 0)
260 ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE,
261 ((ybin - 1) << 4) | (yskip - 1));
262 }
263 dev_dbg(&client->dev, "new physical left %u, top %u\n",
264 rect->left, rect->top);
265
266 /*
267 * The caller provides a supported format, as guaranteed by
268 * .try_mbus_fmt(), soc_camera_s_crop() and soc_camera_cropcap()
269 */
270 if (ret >= 0)
271 ret = reg_write(client, MT9T031_COLUMN_START, rect->left);
272 if (ret >= 0)
273 ret = reg_write(client, MT9T031_ROW_START, rect->top);
274 if (ret >= 0)
275 ret = reg_write(client, MT9T031_WINDOW_WIDTH, rect->width - 1);
276 if (ret >= 0)
277 ret = reg_write(client, MT9T031_WINDOW_HEIGHT,
278 rect->height + mt9t031->y_skip_top - 1);
279 if (ret >= 0 && v4l2_ctrl_g_ctrl(mt9t031->autoexposure) == V4L2_EXPOSURE_AUTO) {
280 mt9t031->total_h = rect->height + mt9t031->y_skip_top + vblank;
281
282 ret = set_shutter(client, mt9t031->total_h);
283 }
284
285 /* Re-enable register update, commit all changes */
286 if (ret >= 0)
287 ret = reg_clear(client, MT9T031_OUTPUT_CONTROL, 1);
288
289 if (ret >= 0) {
290 mt9t031->rect = *rect;
291 mt9t031->xskip = xskip;
292 mt9t031->yskip = yskip;
293 }
294
295 return ret < 0 ? ret : 0;
296 }
297
298 static int mt9t031_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
299 {
300 struct v4l2_rect rect = a->c;
301 struct i2c_client *client = v4l2_get_subdevdata(sd);
302 struct mt9t031 *mt9t031 = to_mt9t031(client);
303
304 rect.width = ALIGN(rect.width, 2);
305 rect.height = ALIGN(rect.height, 2);
306
307 soc_camera_limit_side(&rect.left, &rect.width,
308 MT9T031_COLUMN_SKIP, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH);
309
310 soc_camera_limit_side(&rect.top, &rect.height,
311 MT9T031_ROW_SKIP, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT);
312
313 return mt9t031_set_params(client, &rect, mt9t031->xskip, mt9t031->yskip);
314 }
315
316 static int mt9t031_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
317 {
318 struct i2c_client *client = v4l2_get_subdevdata(sd);
319 struct mt9t031 *mt9t031 = to_mt9t031(client);
320
321 a->c = mt9t031->rect;
322 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
323
324 return 0;
325 }
326
327 static int mt9t031_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
328 {
329 a->bounds.left = MT9T031_COLUMN_SKIP;
330 a->bounds.top = MT9T031_ROW_SKIP;
331 a->bounds.width = MT9T031_MAX_WIDTH;
332 a->bounds.height = MT9T031_MAX_HEIGHT;
333 a->defrect = a->bounds;
334 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
335 a->pixelaspect.numerator = 1;
336 a->pixelaspect.denominator = 1;
337
338 return 0;
339 }
340
341 static int mt9t031_g_fmt(struct v4l2_subdev *sd,
342 struct v4l2_mbus_framefmt *mf)
343 {
344 struct i2c_client *client = v4l2_get_subdevdata(sd);
345 struct mt9t031 *mt9t031 = to_mt9t031(client);
346
347 mf->width = mt9t031->rect.width / mt9t031->xskip;
348 mf->height = mt9t031->rect.height / mt9t031->yskip;
349 mf->code = V4L2_MBUS_FMT_SBGGR10_1X10;
350 mf->colorspace = V4L2_COLORSPACE_SRGB;
351 mf->field = V4L2_FIELD_NONE;
352
353 return 0;
354 }
355
356 static int mt9t031_s_fmt(struct v4l2_subdev *sd,
357 struct v4l2_mbus_framefmt *mf)
358 {
359 struct i2c_client *client = v4l2_get_subdevdata(sd);
360 struct mt9t031 *mt9t031 = to_mt9t031(client);
361 u16 xskip, yskip;
362 struct v4l2_rect rect = mt9t031->rect;
363
364 /*
365 * try_fmt has put width and height within limits.
366 * S_FMT: use binning and skipping for scaling
367 */
368 xskip = mt9t031_skip(&rect.width, mf->width, MT9T031_MAX_WIDTH);
369 yskip = mt9t031_skip(&rect.height, mf->height, MT9T031_MAX_HEIGHT);
370
371 mf->code = V4L2_MBUS_FMT_SBGGR10_1X10;
372 mf->colorspace = V4L2_COLORSPACE_SRGB;
373
374 /* mt9t031_set_params() doesn't change width and height */
375 return mt9t031_set_params(client, &rect, xskip, yskip);
376 }
377
378 /*
379 * If a user window larger than sensor window is requested, we'll increase the
380 * sensor window.
381 */
382 static int mt9t031_try_fmt(struct v4l2_subdev *sd,
383 struct v4l2_mbus_framefmt *mf)
384 {
385 v4l_bound_align_image(
386 &mf->width, MT9T031_MIN_WIDTH, MT9T031_MAX_WIDTH, 1,
387 &mf->height, MT9T031_MIN_HEIGHT, MT9T031_MAX_HEIGHT, 1, 0);
388
389 mf->code = V4L2_MBUS_FMT_SBGGR10_1X10;
390 mf->colorspace = V4L2_COLORSPACE_SRGB;
391
392 return 0;
393 }
394
395 static int mt9t031_g_chip_ident(struct v4l2_subdev *sd,
396 struct v4l2_dbg_chip_ident *id)
397 {
398 struct i2c_client *client = v4l2_get_subdevdata(sd);
399 struct mt9t031 *mt9t031 = to_mt9t031(client);
400
401 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
402 return -EINVAL;
403
404 if (id->match.addr != client->addr)
405 return -ENODEV;
406
407 id->ident = mt9t031->model;
408 id->revision = 0;
409
410 return 0;
411 }
412
413 #ifdef CONFIG_VIDEO_ADV_DEBUG
414 static int mt9t031_g_register(struct v4l2_subdev *sd,
415 struct v4l2_dbg_register *reg)
416 {
417 struct i2c_client *client = v4l2_get_subdevdata(sd);
418
419 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
420 return -EINVAL;
421
422 if (reg->match.addr != client->addr)
423 return -ENODEV;
424
425 reg->val = reg_read(client, reg->reg);
426
427 if (reg->val > 0xffff)
428 return -EIO;
429
430 return 0;
431 }
432
433 static int mt9t031_s_register(struct v4l2_subdev *sd,
434 struct v4l2_dbg_register *reg)
435 {
436 struct i2c_client *client = v4l2_get_subdevdata(sd);
437
438 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
439 return -EINVAL;
440
441 if (reg->match.addr != client->addr)
442 return -ENODEV;
443
444 if (reg_write(client, reg->reg, reg->val) < 0)
445 return -EIO;
446
447 return 0;
448 }
449 #endif
450
451 static int mt9t031_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
452 {
453 struct mt9t031 *mt9t031 = container_of(ctrl->handler,
454 struct mt9t031, hdl);
455 const u32 shutter_max = MT9T031_MAX_HEIGHT + MT9T031_VERTICAL_BLANK;
456 s32 min, max;
457
458 switch (ctrl->id) {
459 case V4L2_CID_EXPOSURE_AUTO:
460 min = mt9t031->exposure->minimum;
461 max = mt9t031->exposure->maximum;
462 mt9t031->exposure->val =
463 (shutter_max / 2 + (mt9t031->total_h - 1) * (max - min))
464 / shutter_max + min;
465 break;
466 }
467 return 0;
468 }
469
470 static int mt9t031_s_ctrl(struct v4l2_ctrl *ctrl)
471 {
472 struct mt9t031 *mt9t031 = container_of(ctrl->handler,
473 struct mt9t031, hdl);
474 struct v4l2_subdev *sd = &mt9t031->subdev;
475 struct i2c_client *client = v4l2_get_subdevdata(sd);
476 struct v4l2_ctrl *exp = mt9t031->exposure;
477 int data;
478
479 switch (ctrl->id) {
480 case V4L2_CID_VFLIP:
481 if (ctrl->val)
482 data = reg_set(client, MT9T031_READ_MODE_2, 0x8000);
483 else
484 data = reg_clear(client, MT9T031_READ_MODE_2, 0x8000);
485 if (data < 0)
486 return -EIO;
487 return 0;
488 case V4L2_CID_HFLIP:
489 if (ctrl->val)
490 data = reg_set(client, MT9T031_READ_MODE_2, 0x4000);
491 else
492 data = reg_clear(client, MT9T031_READ_MODE_2, 0x4000);
493 if (data < 0)
494 return -EIO;
495 return 0;
496 case V4L2_CID_GAIN:
497 /* See Datasheet Table 7, Gain settings. */
498 if (ctrl->val <= ctrl->default_value) {
499 /* Pack it into 0..1 step 0.125, register values 0..8 */
500 unsigned long range = ctrl->default_value - ctrl->minimum;
501 data = ((ctrl->val - ctrl->minimum) * 8 + range / 2) / range;
502
503 dev_dbg(&client->dev, "Setting gain %d\n", data);
504 data = reg_write(client, MT9T031_GLOBAL_GAIN, data);
505 if (data < 0)
506 return -EIO;
507 } else {
508 /* Pack it into 1.125..128 variable step, register values 9..0x7860 */
509 /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */
510 unsigned long range = ctrl->maximum - ctrl->default_value - 1;
511 /* calculated gain: map 65..127 to 9..1024 step 0.125 */
512 unsigned long gain = ((ctrl->val - ctrl->default_value - 1) *
513 1015 + range / 2) / range + 9;
514
515 if (gain <= 32) /* calculated gain 9..32 -> 9..32 */
516 data = gain;
517 else if (gain <= 64) /* calculated gain 33..64 -> 0x51..0x60 */
518 data = ((gain - 32) * 16 + 16) / 32 + 80;
519 else
520 /* calculated gain 65..1024 -> (1..120) << 8 + 0x60 */
521 data = (((gain - 64 + 7) * 32) & 0xff00) | 0x60;
522
523 dev_dbg(&client->dev, "Set gain from 0x%x to 0x%x\n",
524 reg_read(client, MT9T031_GLOBAL_GAIN), data);
525 data = reg_write(client, MT9T031_GLOBAL_GAIN, data);
526 if (data < 0)
527 return -EIO;
528 }
529 return 0;
530
531 case V4L2_CID_EXPOSURE_AUTO:
532 if (ctrl->val == V4L2_EXPOSURE_MANUAL) {
533 unsigned int range = exp->maximum - exp->minimum;
534 unsigned int shutter = ((exp->val - exp->minimum) * 1048 +
535 range / 2) / range + 1;
536 u32 old;
537
538 get_shutter(client, &old);
539 dev_dbg(&client->dev, "Set shutter from %u to %u\n",
540 old, shutter);
541 if (set_shutter(client, shutter) < 0)
542 return -EIO;
543 } else {
544 const u16 vblank = MT9T031_VERTICAL_BLANK;
545 mt9t031->total_h = mt9t031->rect.height +
546 mt9t031->y_skip_top + vblank;
547
548 if (set_shutter(client, mt9t031->total_h) < 0)
549 return -EIO;
550 }
551 return 0;
552 default:
553 return -EINVAL;
554 }
555 return 0;
556 }
557
558 /*
559 * Power Management:
560 * This function does nothing for now but must be present for pm to work
561 */
562 static int mt9t031_runtime_suspend(struct device *dev)
563 {
564 return 0;
565 }
566
567 /*
568 * Power Management:
569 * COLUMN_ADDRESS_MODE and ROW_ADDRESS_MODE are not rewritten if unchanged
570 * they are however changed at reset if the platform hook is present
571 * thus we rewrite them with the values stored by the driver
572 */
573 static int mt9t031_runtime_resume(struct device *dev)
574 {
575 struct video_device *vdev = to_video_device(dev);
576 struct v4l2_subdev *sd = soc_camera_vdev_to_subdev(vdev);
577 struct i2c_client *client = v4l2_get_subdevdata(sd);
578 struct mt9t031 *mt9t031 = to_mt9t031(client);
579
580 int ret;
581 u16 xbin, ybin;
582
583 xbin = min(mt9t031->xskip, (u16)3);
584 ybin = min(mt9t031->yskip, (u16)3);
585
586 ret = reg_write(client, MT9T031_COLUMN_ADDRESS_MODE,
587 ((xbin - 1) << 4) | (mt9t031->xskip - 1));
588 if (ret < 0)
589 return ret;
590
591 ret = reg_write(client, MT9T031_ROW_ADDRESS_MODE,
592 ((ybin - 1) << 4) | (mt9t031->yskip - 1));
593 if (ret < 0)
594 return ret;
595
596 return 0;
597 }
598
599 static struct dev_pm_ops mt9t031_dev_pm_ops = {
600 .runtime_suspend = mt9t031_runtime_suspend,
601 .runtime_resume = mt9t031_runtime_resume,
602 };
603
604 static struct device_type mt9t031_dev_type = {
605 .name = "MT9T031",
606 .pm = &mt9t031_dev_pm_ops,
607 };
608
609 /*
610 * Interface active, can use i2c. If it fails, it can indeed mean, that
611 * this wasn't our capture interface, so, we wait for the right one
612 */
613 static int mt9t031_video_probe(struct i2c_client *client)
614 {
615 struct mt9t031 *mt9t031 = to_mt9t031(client);
616 struct video_device *vdev = soc_camera_i2c_to_vdev(client);
617 s32 data;
618 int ret;
619
620 /* Enable the chip */
621 data = reg_write(client, MT9T031_CHIP_ENABLE, 1);
622 dev_dbg(&client->dev, "write: %d\n", data);
623
624 /* Read out the chip version register */
625 data = reg_read(client, MT9T031_CHIP_VERSION);
626
627 switch (data) {
628 case 0x1621:
629 mt9t031->model = V4L2_IDENT_MT9T031;
630 break;
631 default:
632 dev_err(&client->dev,
633 "No MT9T031 chip detected, register read %x\n", data);
634 return -ENODEV;
635 }
636
637 dev_info(&client->dev, "Detected a MT9T031 chip ID %x\n", data);
638
639 ret = mt9t031_idle(client);
640 if (ret < 0) {
641 dev_err(&client->dev, "Failed to initialise the camera\n");
642 } else {
643 vdev->dev.type = &mt9t031_dev_type;
644 v4l2_ctrl_handler_setup(&mt9t031->hdl);
645 }
646 return ret;
647 }
648
649 static int mt9t031_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
650 {
651 struct i2c_client *client = v4l2_get_subdevdata(sd);
652 struct mt9t031 *mt9t031 = to_mt9t031(client);
653
654 *lines = mt9t031->y_skip_top;
655
656 return 0;
657 }
658
659 static const struct v4l2_ctrl_ops mt9t031_ctrl_ops = {
660 .g_volatile_ctrl = mt9t031_g_volatile_ctrl,
661 .s_ctrl = mt9t031_s_ctrl,
662 };
663
664 static struct v4l2_subdev_core_ops mt9t031_subdev_core_ops = {
665 .g_chip_ident = mt9t031_g_chip_ident,
666 #ifdef CONFIG_VIDEO_ADV_DEBUG
667 .g_register = mt9t031_g_register,
668 .s_register = mt9t031_s_register,
669 #endif
670 };
671
672 static int mt9t031_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
673 enum v4l2_mbus_pixelcode *code)
674 {
675 if (index)
676 return -EINVAL;
677
678 *code = V4L2_MBUS_FMT_SBGGR10_1X10;
679 return 0;
680 }
681
682 static int mt9t031_g_mbus_config(struct v4l2_subdev *sd,
683 struct v4l2_mbus_config *cfg)
684 {
685 struct i2c_client *client = v4l2_get_subdevdata(sd);
686 struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
687
688 cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_PCLK_SAMPLE_RISING |
689 V4L2_MBUS_PCLK_SAMPLE_FALLING | V4L2_MBUS_HSYNC_ACTIVE_HIGH |
690 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_DATA_ACTIVE_HIGH;
691 cfg->type = V4L2_MBUS_PARALLEL;
692 cfg->flags = soc_camera_apply_board_flags(icl, cfg);
693
694 return 0;
695 }
696
697 static int mt9t031_s_mbus_config(struct v4l2_subdev *sd,
698 const struct v4l2_mbus_config *cfg)
699 {
700 struct i2c_client *client = v4l2_get_subdevdata(sd);
701 struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
702
703 if (soc_camera_apply_board_flags(icl, cfg) &
704 V4L2_MBUS_PCLK_SAMPLE_FALLING)
705 return reg_clear(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000);
706 else
707 return reg_set(client, MT9T031_PIXEL_CLOCK_CONTROL, 0x8000);
708 }
709
710 static struct v4l2_subdev_video_ops mt9t031_subdev_video_ops = {
711 .s_stream = mt9t031_s_stream,
712 .s_mbus_fmt = mt9t031_s_fmt,
713 .g_mbus_fmt = mt9t031_g_fmt,
714 .try_mbus_fmt = mt9t031_try_fmt,
715 .s_crop = mt9t031_s_crop,
716 .g_crop = mt9t031_g_crop,
717 .cropcap = mt9t031_cropcap,
718 .enum_mbus_fmt = mt9t031_enum_fmt,
719 .g_mbus_config = mt9t031_g_mbus_config,
720 .s_mbus_config = mt9t031_s_mbus_config,
721 };
722
723 static struct v4l2_subdev_sensor_ops mt9t031_subdev_sensor_ops = {
724 .g_skip_top_lines = mt9t031_g_skip_top_lines,
725 };
726
727 static struct v4l2_subdev_ops mt9t031_subdev_ops = {
728 .core = &mt9t031_subdev_core_ops,
729 .video = &mt9t031_subdev_video_ops,
730 .sensor = &mt9t031_subdev_sensor_ops,
731 };
732
733 static int mt9t031_probe(struct i2c_client *client,
734 const struct i2c_device_id *did)
735 {
736 struct mt9t031 *mt9t031;
737 struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
738 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
739 int ret;
740
741 if (!icl) {
742 dev_err(&client->dev, "MT9T031 driver needs platform data\n");
743 return -EINVAL;
744 }
745
746 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
747 dev_warn(&adapter->dev,
748 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
749 return -EIO;
750 }
751
752 mt9t031 = kzalloc(sizeof(struct mt9t031), GFP_KERNEL);
753 if (!mt9t031)
754 return -ENOMEM;
755
756 v4l2_i2c_subdev_init(&mt9t031->subdev, client, &mt9t031_subdev_ops);
757 v4l2_ctrl_handler_init(&mt9t031->hdl, 5);
758 v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
759 V4L2_CID_VFLIP, 0, 1, 1, 0);
760 v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
761 V4L2_CID_HFLIP, 0, 1, 1, 0);
762 v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
763 V4L2_CID_GAIN, 0, 127, 1, 64);
764
765 /*
766 * Simulated autoexposure. If enabled, we calculate shutter width
767 * ourselves in the driver based on vertical blanking and frame width
768 */
769 mt9t031->autoexposure = v4l2_ctrl_new_std_menu(&mt9t031->hdl,
770 &mt9t031_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
771 V4L2_EXPOSURE_AUTO);
772 mt9t031->exposure = v4l2_ctrl_new_std(&mt9t031->hdl, &mt9t031_ctrl_ops,
773 V4L2_CID_EXPOSURE, 1, 255, 1, 255);
774
775 mt9t031->subdev.ctrl_handler = &mt9t031->hdl;
776 if (mt9t031->hdl.error) {
777 int err = mt9t031->hdl.error;
778
779 kfree(mt9t031);
780 return err;
781 }
782 v4l2_ctrl_auto_cluster(2, &mt9t031->autoexposure,
783 V4L2_EXPOSURE_MANUAL, true);
784
785 mt9t031->y_skip_top = 0;
786 mt9t031->rect.left = MT9T031_COLUMN_SKIP;
787 mt9t031->rect.top = MT9T031_ROW_SKIP;
788 mt9t031->rect.width = MT9T031_MAX_WIDTH;
789 mt9t031->rect.height = MT9T031_MAX_HEIGHT;
790
791 mt9t031->xskip = 1;
792 mt9t031->yskip = 1;
793
794 mt9t031_idle(client);
795
796 ret = mt9t031_video_probe(client);
797
798 mt9t031_disable(client);
799
800 if (ret) {
801 v4l2_ctrl_handler_free(&mt9t031->hdl);
802 kfree(mt9t031);
803 }
804
805 return ret;
806 }
807
808 static int mt9t031_remove(struct i2c_client *client)
809 {
810 struct mt9t031 *mt9t031 = to_mt9t031(client);
811
812 v4l2_device_unregister_subdev(&mt9t031->subdev);
813 v4l2_ctrl_handler_free(&mt9t031->hdl);
814 kfree(mt9t031);
815
816 return 0;
817 }
818
819 static const struct i2c_device_id mt9t031_id[] = {
820 { "mt9t031", 0 },
821 { }
822 };
823 MODULE_DEVICE_TABLE(i2c, mt9t031_id);
824
825 static struct i2c_driver mt9t031_i2c_driver = {
826 .driver = {
827 .name = "mt9t031",
828 },
829 .probe = mt9t031_probe,
830 .remove = mt9t031_remove,
831 .id_table = mt9t031_id,
832 };
833
834 static int __init mt9t031_mod_init(void)
835 {
836 return i2c_add_driver(&mt9t031_i2c_driver);
837 }
838
839 static void __exit mt9t031_mod_exit(void)
840 {
841 i2c_del_driver(&mt9t031_i2c_driver);
842 }
843
844 module_init(mt9t031_mod_init);
845 module_exit(mt9t031_mod_exit);
846
847 MODULE_DESCRIPTION("Micron MT9T031 Camera driver");
848 MODULE_AUTHOR("Guennadi Liakhovetski <lg@denx.de>");
849 MODULE_LICENSE("GPL v2");