]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/media/video/mt9v022.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...
[mirror_ubuntu-artful-kernel.git] / drivers / media / video / mt9v022.c
1 /*
2 * Driver for MT9V022 CMOS Image Sensor from Micron
3 *
4 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.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/videodev2.h>
12 #include <linux/slab.h>
13 #include <linux/i2c.h>
14 #include <linux/delay.h>
15 #include <linux/log2.h>
16
17 #include <media/v4l2-subdev.h>
18 #include <media/v4l2-chip-ident.h>
19 #include <media/soc_camera.h>
20
21 /*
22 * mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
23 * The platform has to define ctruct i2c_board_info objects and link to them
24 * from struct soc_camera_link
25 */
26
27 static char *sensor_type;
28 module_param(sensor_type, charp, S_IRUGO);
29 MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"");
30
31 /* mt9v022 selected register addresses */
32 #define MT9V022_CHIP_VERSION 0x00
33 #define MT9V022_COLUMN_START 0x01
34 #define MT9V022_ROW_START 0x02
35 #define MT9V022_WINDOW_HEIGHT 0x03
36 #define MT9V022_WINDOW_WIDTH 0x04
37 #define MT9V022_HORIZONTAL_BLANKING 0x05
38 #define MT9V022_VERTICAL_BLANKING 0x06
39 #define MT9V022_CHIP_CONTROL 0x07
40 #define MT9V022_SHUTTER_WIDTH1 0x08
41 #define MT9V022_SHUTTER_WIDTH2 0x09
42 #define MT9V022_SHUTTER_WIDTH_CTRL 0x0a
43 #define MT9V022_TOTAL_SHUTTER_WIDTH 0x0b
44 #define MT9V022_RESET 0x0c
45 #define MT9V022_READ_MODE 0x0d
46 #define MT9V022_MONITOR_MODE 0x0e
47 #define MT9V022_PIXEL_OPERATION_MODE 0x0f
48 #define MT9V022_LED_OUT_CONTROL 0x1b
49 #define MT9V022_ADC_MODE_CONTROL 0x1c
50 #define MT9V022_ANALOG_GAIN 0x35
51 #define MT9V022_BLACK_LEVEL_CALIB_CTRL 0x47
52 #define MT9V022_PIXCLK_FV_LV 0x74
53 #define MT9V022_DIGITAL_TEST_PATTERN 0x7f
54 #define MT9V022_AEC_AGC_ENABLE 0xAF
55 #define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD
56
57 /* Progressive scan, master, defaults */
58 #define MT9V022_CHIP_CONTROL_DEFAULT 0x188
59
60 #define MT9V022_MAX_WIDTH 752
61 #define MT9V022_MAX_HEIGHT 480
62 #define MT9V022_MIN_WIDTH 48
63 #define MT9V022_MIN_HEIGHT 32
64 #define MT9V022_COLUMN_SKIP 1
65 #define MT9V022_ROW_SKIP 4
66
67 /* MT9V022 has only one fixed colorspace per pixelcode */
68 struct mt9v022_datafmt {
69 enum v4l2_mbus_pixelcode code;
70 enum v4l2_colorspace colorspace;
71 };
72
73 /* Find a data format by a pixel code in an array */
74 static const struct mt9v022_datafmt *mt9v022_find_datafmt(
75 enum v4l2_mbus_pixelcode code, const struct mt9v022_datafmt *fmt,
76 int n)
77 {
78 int i;
79 for (i = 0; i < n; i++)
80 if (fmt[i].code == code)
81 return fmt + i;
82
83 return NULL;
84 }
85
86 static const struct mt9v022_datafmt mt9v022_colour_fmts[] = {
87 /*
88 * Order important: first natively supported,
89 * second supported with a GPIO extender
90 */
91 {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
92 {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
93 };
94
95 static const struct mt9v022_datafmt mt9v022_monochrome_fmts[] = {
96 /* Order important - see above */
97 {V4L2_MBUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
98 {V4L2_MBUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG},
99 };
100
101 struct mt9v022 {
102 struct v4l2_subdev subdev;
103 struct v4l2_rect rect; /* Sensor window */
104 const struct mt9v022_datafmt *fmt;
105 const struct mt9v022_datafmt *fmts;
106 int num_fmts;
107 int model; /* V4L2_IDENT_MT9V022* codes from v4l2-chip-ident.h */
108 u16 chip_control;
109 unsigned short y_skip_top; /* Lines to skip at the top */
110 };
111
112 static struct mt9v022 *to_mt9v022(const struct i2c_client *client)
113 {
114 return container_of(i2c_get_clientdata(client), struct mt9v022, subdev);
115 }
116
117 static int reg_read(struct i2c_client *client, const u8 reg)
118 {
119 s32 data = i2c_smbus_read_word_data(client, reg);
120 return data < 0 ? data : swab16(data);
121 }
122
123 static int reg_write(struct i2c_client *client, const u8 reg,
124 const u16 data)
125 {
126 return i2c_smbus_write_word_data(client, reg, swab16(data));
127 }
128
129 static int reg_set(struct i2c_client *client, const u8 reg,
130 const u16 data)
131 {
132 int ret;
133
134 ret = reg_read(client, reg);
135 if (ret < 0)
136 return ret;
137 return reg_write(client, reg, ret | data);
138 }
139
140 static int reg_clear(struct i2c_client *client, const u8 reg,
141 const u16 data)
142 {
143 int ret;
144
145 ret = reg_read(client, reg);
146 if (ret < 0)
147 return ret;
148 return reg_write(client, reg, ret & ~data);
149 }
150
151 static int mt9v022_init(struct i2c_client *client)
152 {
153 struct mt9v022 *mt9v022 = to_mt9v022(client);
154 int ret;
155
156 /*
157 * Almost the default mode: master, parallel, simultaneous, and an
158 * undocumented bit 0x200, which is present in table 7, but not in 8,
159 * plus snapshot mode to disable scan for now
160 */
161 mt9v022->chip_control |= 0x10;
162 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
163 if (!ret)
164 ret = reg_write(client, MT9V022_READ_MODE, 0x300);
165
166 /* All defaults */
167 if (!ret)
168 /* AEC, AGC on */
169 ret = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x3);
170 if (!ret)
171 ret = reg_write(client, MT9V022_ANALOG_GAIN, 16);
172 if (!ret)
173 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH, 480);
174 if (!ret)
175 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH, 480);
176 if (!ret)
177 /* default - auto */
178 ret = reg_clear(client, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
179 if (!ret)
180 ret = reg_write(client, MT9V022_DIGITAL_TEST_PATTERN, 0);
181
182 return ret;
183 }
184
185 static int mt9v022_s_stream(struct v4l2_subdev *sd, int enable)
186 {
187 struct i2c_client *client = v4l2_get_subdevdata(sd);
188 struct mt9v022 *mt9v022 = to_mt9v022(client);
189
190 if (enable)
191 /* Switch to master "normal" mode */
192 mt9v022->chip_control &= ~0x10;
193 else
194 /* Switch to snapshot mode */
195 mt9v022->chip_control |= 0x10;
196
197 if (reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control) < 0)
198 return -EIO;
199 return 0;
200 }
201
202 static int mt9v022_set_bus_param(struct soc_camera_device *icd,
203 unsigned long flags)
204 {
205 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
206 struct mt9v022 *mt9v022 = to_mt9v022(client);
207 struct soc_camera_link *icl = to_soc_camera_link(icd);
208 unsigned int width_flag = flags & SOCAM_DATAWIDTH_MASK;
209 int ret;
210 u16 pixclk = 0;
211
212 /* Only one width bit may be set */
213 if (!is_power_of_2(width_flag))
214 return -EINVAL;
215
216 if (icl->set_bus_param) {
217 ret = icl->set_bus_param(icl, width_flag);
218 if (ret)
219 return ret;
220 } else {
221 /*
222 * Without board specific bus width settings we only support the
223 * sensors native bus width
224 */
225 if (width_flag != SOCAM_DATAWIDTH_10)
226 return -EINVAL;
227 }
228
229 flags = soc_camera_apply_sensor_flags(icl, flags);
230
231 if (flags & SOCAM_PCLK_SAMPLE_FALLING)
232 pixclk |= 0x10;
233
234 if (!(flags & SOCAM_HSYNC_ACTIVE_HIGH))
235 pixclk |= 0x1;
236
237 if (!(flags & SOCAM_VSYNC_ACTIVE_HIGH))
238 pixclk |= 0x2;
239
240 ret = reg_write(client, MT9V022_PIXCLK_FV_LV, pixclk);
241 if (ret < 0)
242 return ret;
243
244 if (!(flags & SOCAM_MASTER))
245 mt9v022->chip_control &= ~0x8;
246
247 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
248 if (ret < 0)
249 return ret;
250
251 dev_dbg(&client->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
252 pixclk, mt9v022->chip_control);
253
254 return 0;
255 }
256
257 static unsigned long mt9v022_query_bus_param(struct soc_camera_device *icd)
258 {
259 struct soc_camera_link *icl = to_soc_camera_link(icd);
260 unsigned int flags = SOCAM_MASTER | SOCAM_SLAVE |
261 SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING |
262 SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW |
263 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW |
264 SOCAM_DATA_ACTIVE_HIGH;
265
266 if (icl->query_bus_param)
267 flags |= icl->query_bus_param(icl) & SOCAM_DATAWIDTH_MASK;
268 else
269 flags |= SOCAM_DATAWIDTH_10;
270
271 return soc_camera_apply_sensor_flags(icl, flags);
272 }
273
274 static int mt9v022_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
275 {
276 struct i2c_client *client = v4l2_get_subdevdata(sd);
277 struct mt9v022 *mt9v022 = to_mt9v022(client);
278 struct v4l2_rect rect = a->c;
279 int ret;
280
281 /* Bayer format - even size lengths */
282 if (mt9v022->fmts == mt9v022_colour_fmts) {
283 rect.width = ALIGN(rect.width, 2);
284 rect.height = ALIGN(rect.height, 2);
285 /* Let the user play with the starting pixel */
286 }
287
288 soc_camera_limit_side(&rect.left, &rect.width,
289 MT9V022_COLUMN_SKIP, MT9V022_MIN_WIDTH, MT9V022_MAX_WIDTH);
290
291 soc_camera_limit_side(&rect.top, &rect.height,
292 MT9V022_ROW_SKIP, MT9V022_MIN_HEIGHT, MT9V022_MAX_HEIGHT);
293
294 /* Like in example app. Contradicts the datasheet though */
295 ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
296 if (ret >= 0) {
297 if (ret & 1) /* Autoexposure */
298 ret = reg_write(client, MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
299 rect.height + mt9v022->y_skip_top + 43);
300 else
301 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
302 rect.height + mt9v022->y_skip_top + 43);
303 }
304 /* Setup frame format: defaults apart from width and height */
305 if (!ret)
306 ret = reg_write(client, MT9V022_COLUMN_START, rect.left);
307 if (!ret)
308 ret = reg_write(client, MT9V022_ROW_START, rect.top);
309 if (!ret)
310 /*
311 * Default 94, Phytec driver says:
312 * "width + horizontal blank >= 660"
313 */
314 ret = reg_write(client, MT9V022_HORIZONTAL_BLANKING,
315 rect.width > 660 - 43 ? 43 :
316 660 - rect.width);
317 if (!ret)
318 ret = reg_write(client, MT9V022_VERTICAL_BLANKING, 45);
319 if (!ret)
320 ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect.width);
321 if (!ret)
322 ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
323 rect.height + mt9v022->y_skip_top);
324
325 if (ret < 0)
326 return ret;
327
328 dev_dbg(&client->dev, "Frame %dx%d pixel\n", rect.width, rect.height);
329
330 mt9v022->rect = rect;
331
332 return 0;
333 }
334
335 static int mt9v022_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
336 {
337 struct i2c_client *client = v4l2_get_subdevdata(sd);
338 struct mt9v022 *mt9v022 = to_mt9v022(client);
339
340 a->c = mt9v022->rect;
341 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
342
343 return 0;
344 }
345
346 static int mt9v022_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
347 {
348 a->bounds.left = MT9V022_COLUMN_SKIP;
349 a->bounds.top = MT9V022_ROW_SKIP;
350 a->bounds.width = MT9V022_MAX_WIDTH;
351 a->bounds.height = MT9V022_MAX_HEIGHT;
352 a->defrect = a->bounds;
353 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
354 a->pixelaspect.numerator = 1;
355 a->pixelaspect.denominator = 1;
356
357 return 0;
358 }
359
360 static int mt9v022_g_fmt(struct v4l2_subdev *sd,
361 struct v4l2_mbus_framefmt *mf)
362 {
363 struct i2c_client *client = v4l2_get_subdevdata(sd);
364 struct mt9v022 *mt9v022 = to_mt9v022(client);
365
366 mf->width = mt9v022->rect.width;
367 mf->height = mt9v022->rect.height;
368 mf->code = mt9v022->fmt->code;
369 mf->colorspace = mt9v022->fmt->colorspace;
370 mf->field = V4L2_FIELD_NONE;
371
372 return 0;
373 }
374
375 static int mt9v022_s_fmt(struct v4l2_subdev *sd,
376 struct v4l2_mbus_framefmt *mf)
377 {
378 struct i2c_client *client = v4l2_get_subdevdata(sd);
379 struct mt9v022 *mt9v022 = to_mt9v022(client);
380 struct v4l2_crop a = {
381 .c = {
382 .left = mt9v022->rect.left,
383 .top = mt9v022->rect.top,
384 .width = mf->width,
385 .height = mf->height,
386 },
387 };
388 int ret;
389
390 /*
391 * The caller provides a supported format, as verified per call to
392 * icd->try_fmt(), datawidth is from our supported format list
393 */
394 switch (mf->code) {
395 case V4L2_MBUS_FMT_Y8_1X8:
396 case V4L2_MBUS_FMT_Y10_1X10:
397 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATM)
398 return -EINVAL;
399 break;
400 case V4L2_MBUS_FMT_SBGGR8_1X8:
401 case V4L2_MBUS_FMT_SBGGR10_1X10:
402 if (mt9v022->model != V4L2_IDENT_MT9V022IX7ATC)
403 return -EINVAL;
404 break;
405 default:
406 return -EINVAL;
407 }
408
409 /* No support for scaling on this camera, just crop. */
410 ret = mt9v022_s_crop(sd, &a);
411 if (!ret) {
412 mf->width = mt9v022->rect.width;
413 mf->height = mt9v022->rect.height;
414 mt9v022->fmt = mt9v022_find_datafmt(mf->code,
415 mt9v022->fmts, mt9v022->num_fmts);
416 mf->colorspace = mt9v022->fmt->colorspace;
417 }
418
419 return ret;
420 }
421
422 static int mt9v022_try_fmt(struct v4l2_subdev *sd,
423 struct v4l2_mbus_framefmt *mf)
424 {
425 struct i2c_client *client = v4l2_get_subdevdata(sd);
426 struct mt9v022 *mt9v022 = to_mt9v022(client);
427 const struct mt9v022_datafmt *fmt;
428 int align = mf->code == V4L2_MBUS_FMT_SBGGR8_1X8 ||
429 mf->code == V4L2_MBUS_FMT_SBGGR10_1X10;
430
431 v4l_bound_align_image(&mf->width, MT9V022_MIN_WIDTH,
432 MT9V022_MAX_WIDTH, align,
433 &mf->height, MT9V022_MIN_HEIGHT + mt9v022->y_skip_top,
434 MT9V022_MAX_HEIGHT + mt9v022->y_skip_top, align, 0);
435
436 fmt = mt9v022_find_datafmt(mf->code, mt9v022->fmts,
437 mt9v022->num_fmts);
438 if (!fmt) {
439 fmt = mt9v022->fmt;
440 mf->code = fmt->code;
441 }
442
443 mf->colorspace = fmt->colorspace;
444
445 return 0;
446 }
447
448 static int mt9v022_g_chip_ident(struct v4l2_subdev *sd,
449 struct v4l2_dbg_chip_ident *id)
450 {
451 struct i2c_client *client = v4l2_get_subdevdata(sd);
452 struct mt9v022 *mt9v022 = to_mt9v022(client);
453
454 if (id->match.type != V4L2_CHIP_MATCH_I2C_ADDR)
455 return -EINVAL;
456
457 if (id->match.addr != client->addr)
458 return -ENODEV;
459
460 id->ident = mt9v022->model;
461 id->revision = 0;
462
463 return 0;
464 }
465
466 #ifdef CONFIG_VIDEO_ADV_DEBUG
467 static int mt9v022_g_register(struct v4l2_subdev *sd,
468 struct v4l2_dbg_register *reg)
469 {
470 struct i2c_client *client = v4l2_get_subdevdata(sd);
471
472 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
473 return -EINVAL;
474
475 if (reg->match.addr != client->addr)
476 return -ENODEV;
477
478 reg->size = 2;
479 reg->val = reg_read(client, reg->reg);
480
481 if (reg->val > 0xffff)
482 return -EIO;
483
484 return 0;
485 }
486
487 static int mt9v022_s_register(struct v4l2_subdev *sd,
488 struct v4l2_dbg_register *reg)
489 {
490 struct i2c_client *client = v4l2_get_subdevdata(sd);
491
492 if (reg->match.type != V4L2_CHIP_MATCH_I2C_ADDR || reg->reg > 0xff)
493 return -EINVAL;
494
495 if (reg->match.addr != client->addr)
496 return -ENODEV;
497
498 if (reg_write(client, reg->reg, reg->val) < 0)
499 return -EIO;
500
501 return 0;
502 }
503 #endif
504
505 static const struct v4l2_queryctrl mt9v022_controls[] = {
506 {
507 .id = V4L2_CID_VFLIP,
508 .type = V4L2_CTRL_TYPE_BOOLEAN,
509 .name = "Flip Vertically",
510 .minimum = 0,
511 .maximum = 1,
512 .step = 1,
513 .default_value = 0,
514 }, {
515 .id = V4L2_CID_HFLIP,
516 .type = V4L2_CTRL_TYPE_BOOLEAN,
517 .name = "Flip Horizontally",
518 .minimum = 0,
519 .maximum = 1,
520 .step = 1,
521 .default_value = 0,
522 }, {
523 .id = V4L2_CID_GAIN,
524 .type = V4L2_CTRL_TYPE_INTEGER,
525 .name = "Analog Gain",
526 .minimum = 64,
527 .maximum = 127,
528 .step = 1,
529 .default_value = 64,
530 .flags = V4L2_CTRL_FLAG_SLIDER,
531 }, {
532 .id = V4L2_CID_EXPOSURE,
533 .type = V4L2_CTRL_TYPE_INTEGER,
534 .name = "Exposure",
535 .minimum = 1,
536 .maximum = 255,
537 .step = 1,
538 .default_value = 255,
539 .flags = V4L2_CTRL_FLAG_SLIDER,
540 }, {
541 .id = V4L2_CID_AUTOGAIN,
542 .type = V4L2_CTRL_TYPE_BOOLEAN,
543 .name = "Automatic Gain",
544 .minimum = 0,
545 .maximum = 1,
546 .step = 1,
547 .default_value = 1,
548 }, {
549 .id = V4L2_CID_EXPOSURE_AUTO,
550 .type = V4L2_CTRL_TYPE_BOOLEAN,
551 .name = "Automatic Exposure",
552 .minimum = 0,
553 .maximum = 1,
554 .step = 1,
555 .default_value = 1,
556 }
557 };
558
559 static struct soc_camera_ops mt9v022_ops = {
560 .set_bus_param = mt9v022_set_bus_param,
561 .query_bus_param = mt9v022_query_bus_param,
562 .controls = mt9v022_controls,
563 .num_controls = ARRAY_SIZE(mt9v022_controls),
564 };
565
566 static int mt9v022_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
567 {
568 struct i2c_client *client = v4l2_get_subdevdata(sd);
569 const struct v4l2_queryctrl *qctrl;
570 unsigned long range;
571 int data;
572
573 qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
574
575 switch (ctrl->id) {
576 case V4L2_CID_VFLIP:
577 data = reg_read(client, MT9V022_READ_MODE);
578 if (data < 0)
579 return -EIO;
580 ctrl->value = !!(data & 0x10);
581 break;
582 case V4L2_CID_HFLIP:
583 data = reg_read(client, MT9V022_READ_MODE);
584 if (data < 0)
585 return -EIO;
586 ctrl->value = !!(data & 0x20);
587 break;
588 case V4L2_CID_EXPOSURE_AUTO:
589 data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
590 if (data < 0)
591 return -EIO;
592 ctrl->value = !!(data & 0x1);
593 break;
594 case V4L2_CID_AUTOGAIN:
595 data = reg_read(client, MT9V022_AEC_AGC_ENABLE);
596 if (data < 0)
597 return -EIO;
598 ctrl->value = !!(data & 0x2);
599 break;
600 case V4L2_CID_GAIN:
601 data = reg_read(client, MT9V022_ANALOG_GAIN);
602 if (data < 0)
603 return -EIO;
604
605 range = qctrl->maximum - qctrl->minimum;
606 ctrl->value = ((data - 16) * range + 24) / 48 + qctrl->minimum;
607
608 break;
609 case V4L2_CID_EXPOSURE:
610 data = reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH);
611 if (data < 0)
612 return -EIO;
613
614 range = qctrl->maximum - qctrl->minimum;
615 ctrl->value = ((data - 1) * range + 239) / 479 + qctrl->minimum;
616
617 break;
618 }
619 return 0;
620 }
621
622 static int mt9v022_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
623 {
624 int data;
625 struct i2c_client *client = v4l2_get_subdevdata(sd);
626 const struct v4l2_queryctrl *qctrl;
627
628 qctrl = soc_camera_find_qctrl(&mt9v022_ops, ctrl->id);
629 if (!qctrl)
630 return -EINVAL;
631
632 switch (ctrl->id) {
633 case V4L2_CID_VFLIP:
634 if (ctrl->value)
635 data = reg_set(client, MT9V022_READ_MODE, 0x10);
636 else
637 data = reg_clear(client, MT9V022_READ_MODE, 0x10);
638 if (data < 0)
639 return -EIO;
640 break;
641 case V4L2_CID_HFLIP:
642 if (ctrl->value)
643 data = reg_set(client, MT9V022_READ_MODE, 0x20);
644 else
645 data = reg_clear(client, MT9V022_READ_MODE, 0x20);
646 if (data < 0)
647 return -EIO;
648 break;
649 case V4L2_CID_GAIN:
650 /* mt9v022 has minimum == default */
651 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
652 return -EINVAL;
653 else {
654 unsigned long range = qctrl->maximum - qctrl->minimum;
655 /* Valid values 16 to 64, 32 to 64 must be even. */
656 unsigned long gain = ((ctrl->value - qctrl->minimum) *
657 48 + range / 2) / range + 16;
658 if (gain >= 32)
659 gain &= ~1;
660 /*
661 * The user wants to set gain manually, hope, she
662 * knows, what she's doing... Switch AGC off.
663 */
664
665 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
666 return -EIO;
667
668 dev_dbg(&client->dev, "Setting gain from %d to %lu\n",
669 reg_read(client, MT9V022_ANALOG_GAIN), gain);
670 if (reg_write(client, MT9V022_ANALOG_GAIN, gain) < 0)
671 return -EIO;
672 }
673 break;
674 case V4L2_CID_EXPOSURE:
675 /* mt9v022 has maximum == default */
676 if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum)
677 return -EINVAL;
678 else {
679 unsigned long range = qctrl->maximum - qctrl->minimum;
680 unsigned long shutter = ((ctrl->value - qctrl->minimum) *
681 479 + range / 2) / range + 1;
682 /*
683 * The user wants to set shutter width manually, hope,
684 * she knows, what she's doing... Switch AEC off.
685 */
686
687 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1) < 0)
688 return -EIO;
689
690 dev_dbg(&client->dev, "Shutter width from %d to %lu\n",
691 reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
692 shutter);
693 if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
694 shutter) < 0)
695 return -EIO;
696 }
697 break;
698 case V4L2_CID_AUTOGAIN:
699 if (ctrl->value)
700 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2);
701 else
702 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2);
703 if (data < 0)
704 return -EIO;
705 break;
706 case V4L2_CID_EXPOSURE_AUTO:
707 if (ctrl->value)
708 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
709 else
710 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
711 if (data < 0)
712 return -EIO;
713 break;
714 }
715 return 0;
716 }
717
718 /*
719 * Interface active, can use i2c. If it fails, it can indeed mean, that
720 * this wasn't our capture interface, so, we wait for the right one
721 */
722 static int mt9v022_video_probe(struct soc_camera_device *icd,
723 struct i2c_client *client)
724 {
725 struct mt9v022 *mt9v022 = to_mt9v022(client);
726 struct soc_camera_link *icl = to_soc_camera_link(icd);
727 s32 data;
728 int ret;
729 unsigned long flags;
730
731 /* We must have a parent by now. And it cannot be a wrong one. */
732 BUG_ON(!icd->parent ||
733 to_soc_camera_host(icd->parent)->nr != icd->iface);
734
735 /* Read out the chip version register */
736 data = reg_read(client, MT9V022_CHIP_VERSION);
737
738 /* must be 0x1311 or 0x1313 */
739 if (data != 0x1311 && data != 0x1313) {
740 ret = -ENODEV;
741 dev_info(&client->dev, "No MT9V022 found, ID register 0x%x\n",
742 data);
743 goto ei2c;
744 }
745
746 /* Soft reset */
747 ret = reg_write(client, MT9V022_RESET, 1);
748 if (ret < 0)
749 goto ei2c;
750 /* 15 clock cycles */
751 udelay(200);
752 if (reg_read(client, MT9V022_RESET)) {
753 dev_err(&client->dev, "Resetting MT9V022 failed!\n");
754 if (ret > 0)
755 ret = -EIO;
756 goto ei2c;
757 }
758
759 /* Set monochrome or colour sensor type */
760 if (sensor_type && (!strcmp("colour", sensor_type) ||
761 !strcmp("color", sensor_type))) {
762 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
763 mt9v022->model = V4L2_IDENT_MT9V022IX7ATC;
764 mt9v022->fmts = mt9v022_colour_fmts;
765 } else {
766 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
767 mt9v022->model = V4L2_IDENT_MT9V022IX7ATM;
768 mt9v022->fmts = mt9v022_monochrome_fmts;
769 }
770
771 if (ret < 0)
772 goto ei2c;
773
774 mt9v022->num_fmts = 0;
775
776 /*
777 * This is a 10bit sensor, so by default we only allow 10bit.
778 * The platform may support different bus widths due to
779 * different routing of the data lines.
780 */
781 if (icl->query_bus_param)
782 flags = icl->query_bus_param(icl);
783 else
784 flags = SOCAM_DATAWIDTH_10;
785
786 if (flags & SOCAM_DATAWIDTH_10)
787 mt9v022->num_fmts++;
788 else
789 mt9v022->fmts++;
790
791 if (flags & SOCAM_DATAWIDTH_8)
792 mt9v022->num_fmts++;
793
794 mt9v022->fmt = &mt9v022->fmts[0];
795
796 dev_info(&client->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
797 data, mt9v022->model == V4L2_IDENT_MT9V022IX7ATM ?
798 "monochrome" : "colour");
799
800 ret = mt9v022_init(client);
801 if (ret < 0)
802 dev_err(&client->dev, "Failed to initialise the camera\n");
803
804 ei2c:
805 return ret;
806 }
807
808 static void mt9v022_video_remove(struct soc_camera_device *icd)
809 {
810 struct soc_camera_link *icl = to_soc_camera_link(icd);
811
812 dev_dbg(icd->pdev, "Video removed: %p, %p\n",
813 icd->parent, icd->vdev);
814 if (icl->free_bus)
815 icl->free_bus(icl);
816 }
817
818 static int mt9v022_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
819 {
820 struct i2c_client *client = v4l2_get_subdevdata(sd);
821 struct mt9v022 *mt9v022 = to_mt9v022(client);
822
823 *lines = mt9v022->y_skip_top;
824
825 return 0;
826 }
827
828 static struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
829 .g_ctrl = mt9v022_g_ctrl,
830 .s_ctrl = mt9v022_s_ctrl,
831 .g_chip_ident = mt9v022_g_chip_ident,
832 #ifdef CONFIG_VIDEO_ADV_DEBUG
833 .g_register = mt9v022_g_register,
834 .s_register = mt9v022_s_register,
835 #endif
836 };
837
838 static int mt9v022_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
839 enum v4l2_mbus_pixelcode *code)
840 {
841 struct i2c_client *client = v4l2_get_subdevdata(sd);
842 struct mt9v022 *mt9v022 = to_mt9v022(client);
843
844 if (index >= mt9v022->num_fmts)
845 return -EINVAL;
846
847 *code = mt9v022->fmts[index].code;
848 return 0;
849 }
850
851 static struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
852 .s_stream = mt9v022_s_stream,
853 .s_mbus_fmt = mt9v022_s_fmt,
854 .g_mbus_fmt = mt9v022_g_fmt,
855 .try_mbus_fmt = mt9v022_try_fmt,
856 .s_crop = mt9v022_s_crop,
857 .g_crop = mt9v022_g_crop,
858 .cropcap = mt9v022_cropcap,
859 .enum_mbus_fmt = mt9v022_enum_fmt,
860 };
861
862 static struct v4l2_subdev_sensor_ops mt9v022_subdev_sensor_ops = {
863 .g_skip_top_lines = mt9v022_g_skip_top_lines,
864 };
865
866 static struct v4l2_subdev_ops mt9v022_subdev_ops = {
867 .core = &mt9v022_subdev_core_ops,
868 .video = &mt9v022_subdev_video_ops,
869 .sensor = &mt9v022_subdev_sensor_ops,
870 };
871
872 static int mt9v022_probe(struct i2c_client *client,
873 const struct i2c_device_id *did)
874 {
875 struct mt9v022 *mt9v022;
876 struct soc_camera_device *icd = client->dev.platform_data;
877 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
878 struct soc_camera_link *icl;
879 int ret;
880
881 if (!icd) {
882 dev_err(&client->dev, "MT9V022: missing soc-camera data!\n");
883 return -EINVAL;
884 }
885
886 icl = to_soc_camera_link(icd);
887 if (!icl) {
888 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
889 return -EINVAL;
890 }
891
892 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
893 dev_warn(&adapter->dev,
894 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
895 return -EIO;
896 }
897
898 mt9v022 = kzalloc(sizeof(struct mt9v022), GFP_KERNEL);
899 if (!mt9v022)
900 return -ENOMEM;
901
902 v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
903
904 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
905
906 icd->ops = &mt9v022_ops;
907 /*
908 * MT9V022 _really_ corrupts the first read out line.
909 * TODO: verify on i.MX31
910 */
911 mt9v022->y_skip_top = 1;
912 mt9v022->rect.left = MT9V022_COLUMN_SKIP;
913 mt9v022->rect.top = MT9V022_ROW_SKIP;
914 mt9v022->rect.width = MT9V022_MAX_WIDTH;
915 mt9v022->rect.height = MT9V022_MAX_HEIGHT;
916
917 ret = mt9v022_video_probe(icd, client);
918 if (ret) {
919 icd->ops = NULL;
920 kfree(mt9v022);
921 }
922
923 return ret;
924 }
925
926 static int mt9v022_remove(struct i2c_client *client)
927 {
928 struct mt9v022 *mt9v022 = to_mt9v022(client);
929 struct soc_camera_device *icd = client->dev.platform_data;
930
931 icd->ops = NULL;
932 mt9v022_video_remove(icd);
933 kfree(mt9v022);
934
935 return 0;
936 }
937 static const struct i2c_device_id mt9v022_id[] = {
938 { "mt9v022", 0 },
939 { }
940 };
941 MODULE_DEVICE_TABLE(i2c, mt9v022_id);
942
943 static struct i2c_driver mt9v022_i2c_driver = {
944 .driver = {
945 .name = "mt9v022",
946 },
947 .probe = mt9v022_probe,
948 .remove = mt9v022_remove,
949 .id_table = mt9v022_id,
950 };
951
952 static int __init mt9v022_mod_init(void)
953 {
954 return i2c_add_driver(&mt9v022_i2c_driver);
955 }
956
957 static void __exit mt9v022_mod_exit(void)
958 {
959 i2c_del_driver(&mt9v022_i2c_driver);
960 }
961
962 module_init(mt9v022_mod_init);
963 module_exit(mt9v022_mod_exit);
964
965 MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
966 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
967 MODULE_LICENSE("GPL");
Ubuntu Artful kernel mirror