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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / media / i2c / soc_camera / mt9v022.c
blobf9f95f815b1a8c80ebe1b51d055b0cb28cd6f81a
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 #include <linux/module.h>
17
18 #include <media/mt9v022.h>
19 #include <media/soc_camera.h>
20 #include <media/soc_mediabus.h>
21 #include <media/v4l2-subdev.h>
22 #include <media/v4l2-clk.h>
23 #include <media/v4l2-ctrls.h>
24
25 /*
26 * mt9v022 i2c address 0x48, 0x4c, 0x58, 0x5c
27 * The platform has to define struct i2c_board_info objects and link to them
28 * from struct soc_camera_host_desc
29 */
30
31 static char *sensor_type;
32 module_param(sensor_type, charp, S_IRUGO);
33 MODULE_PARM_DESC(sensor_type, "Sensor type: \"colour\" or \"monochrome\"");
34
35 /* mt9v022 selected register addresses */
36 #define MT9V022_CHIP_VERSION 0x00
37 #define MT9V022_COLUMN_START 0x01
38 #define MT9V022_ROW_START 0x02
39 #define MT9V022_WINDOW_HEIGHT 0x03
40 #define MT9V022_WINDOW_WIDTH 0x04
41 #define MT9V022_HORIZONTAL_BLANKING 0x05
42 #define MT9V022_VERTICAL_BLANKING 0x06
43 #define MT9V022_CHIP_CONTROL 0x07
44 #define MT9V022_SHUTTER_WIDTH1 0x08
45 #define MT9V022_SHUTTER_WIDTH2 0x09
46 #define MT9V022_SHUTTER_WIDTH_CTRL 0x0a
47 #define MT9V022_TOTAL_SHUTTER_WIDTH 0x0b
48 #define MT9V022_RESET 0x0c
49 #define MT9V022_READ_MODE 0x0d
50 #define MT9V022_MONITOR_MODE 0x0e
51 #define MT9V022_PIXEL_OPERATION_MODE 0x0f
52 #define MT9V022_LED_OUT_CONTROL 0x1b
53 #define MT9V022_ADC_MODE_CONTROL 0x1c
54 #define MT9V022_REG32 0x20
55 #define MT9V022_ANALOG_GAIN 0x35
56 #define MT9V022_BLACK_LEVEL_CALIB_CTRL 0x47
57 #define MT9V022_PIXCLK_FV_LV 0x74
58 #define MT9V022_DIGITAL_TEST_PATTERN 0x7f
59 #define MT9V022_AEC_AGC_ENABLE 0xAF
60 #define MT9V022_MAX_TOTAL_SHUTTER_WIDTH 0xBD
61
62 /* mt9v024 partial list register addresses changes with respect to mt9v022 */
63 #define MT9V024_PIXCLK_FV_LV 0x72
64 #define MT9V024_MAX_TOTAL_SHUTTER_WIDTH 0xAD
65
66 /* Progressive scan, master, defaults */
67 #define MT9V022_CHIP_CONTROL_DEFAULT 0x188
68
69 #define MT9V022_MAX_WIDTH 752
70 #define MT9V022_MAX_HEIGHT 480
71 #define MT9V022_MIN_WIDTH 48
72 #define MT9V022_MIN_HEIGHT 32
73 #define MT9V022_COLUMN_SKIP 1
74 #define MT9V022_ROW_SKIP 4
75
76 #define MT9V022_HORIZONTAL_BLANKING_MIN 43
77 #define MT9V022_HORIZONTAL_BLANKING_MAX 1023
78 #define MT9V022_HORIZONTAL_BLANKING_DEF 94
79 #define MT9V022_VERTICAL_BLANKING_MIN 2
80 #define MT9V022_VERTICAL_BLANKING_MAX 3000
81 #define MT9V022_VERTICAL_BLANKING_DEF 45
82
83 #define is_mt9v022_rev3(id) (id == 0x1313)
84 #define is_mt9v024(id) (id == 0x1324)
85
86 /* MT9V022 has only one fixed colorspace per pixelcode */
87 struct mt9v022_datafmt {
88 enum v4l2_mbus_pixelcode code;
89 enum v4l2_colorspace colorspace;
90 };
91
92 /* Find a data format by a pixel code in an array */
93 static const struct mt9v022_datafmt *mt9v022_find_datafmt(
94 enum v4l2_mbus_pixelcode code, const struct mt9v022_datafmt *fmt,
95 int n)
96 {
97 int i;
98 for (i = 0; i < n; i++)
99 if (fmt[i].code == code)
100 return fmt + i;
101
102 return NULL;
103 }
104
105 static const struct mt9v022_datafmt mt9v022_colour_fmts[] = {
106 /*
107 * Order important: first natively supported,
108 * second supported with a GPIO extender
109 */
110 {V4L2_MBUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
111 {V4L2_MBUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
112 };
113
114 static const struct mt9v022_datafmt mt9v022_monochrome_fmts[] = {
115 /* Order important - see above */
116 {V4L2_MBUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
117 {V4L2_MBUS_FMT_Y8_1X8, V4L2_COLORSPACE_JPEG},
118 };
119
120 /* only registers with different addresses on different mt9v02x sensors */
121 struct mt9v02x_register {
122 u8 max_total_shutter_width;
123 u8 pixclk_fv_lv;
124 };
125
126 static const struct mt9v02x_register mt9v022_register = {
127 .max_total_shutter_width = MT9V022_MAX_TOTAL_SHUTTER_WIDTH,
128 .pixclk_fv_lv = MT9V022_PIXCLK_FV_LV,
129 };
130
131 static const struct mt9v02x_register mt9v024_register = {
132 .max_total_shutter_width = MT9V024_MAX_TOTAL_SHUTTER_WIDTH,
133 .pixclk_fv_lv = MT9V024_PIXCLK_FV_LV,
134 };
135
136 enum mt9v022_model {
137 MT9V022IX7ATM,
138 MT9V022IX7ATC,
139 };
140
141 struct mt9v022 {
142 struct v4l2_subdev subdev;
143 struct v4l2_ctrl_handler hdl;
144 struct {
145 /* exposure/auto-exposure cluster */
146 struct v4l2_ctrl *autoexposure;
147 struct v4l2_ctrl *exposure;
148 };
149 struct {
150 /* gain/auto-gain cluster */
151 struct v4l2_ctrl *autogain;
152 struct v4l2_ctrl *gain;
153 };
154 struct v4l2_ctrl *hblank;
155 struct v4l2_ctrl *vblank;
156 struct v4l2_rect rect; /* Sensor window */
157 struct v4l2_clk *clk;
158 const struct mt9v022_datafmt *fmt;
159 const struct mt9v022_datafmt *fmts;
160 const struct mt9v02x_register *reg;
161 int num_fmts;
162 enum mt9v022_model model;
163 u16 chip_control;
164 u16 chip_version;
165 unsigned short y_skip_top; /* Lines to skip at the top */
166 };
167
168 static struct mt9v022 *to_mt9v022(const struct i2c_client *client)
169 {
170 return container_of(i2c_get_clientdata(client), struct mt9v022, subdev);
171 }
172
173 static int reg_read(struct i2c_client *client, const u8 reg)
174 {
175 return i2c_smbus_read_word_swapped(client, reg);
176 }
177
178 static int reg_write(struct i2c_client *client, const u8 reg,
179 const u16 data)
180 {
181 return i2c_smbus_write_word_swapped(client, reg, data);
182 }
183
184 static int reg_set(struct i2c_client *client, const u8 reg,
185 const u16 data)
186 {
187 int ret;
188
189 ret = reg_read(client, reg);
190 if (ret < 0)
191 return ret;
192 return reg_write(client, reg, ret | data);
193 }
194
195 static int reg_clear(struct i2c_client *client, const u8 reg,
196 const u16 data)
197 {
198 int ret;
199
200 ret = reg_read(client, reg);
201 if (ret < 0)
202 return ret;
203 return reg_write(client, reg, ret & ~data);
204 }
205
206 static int mt9v022_init(struct i2c_client *client)
207 {
208 struct mt9v022 *mt9v022 = to_mt9v022(client);
209 int ret;
210
211 /*
212 * Almost the default mode: master, parallel, simultaneous, and an
213 * undocumented bit 0x200, which is present in table 7, but not in 8,
214 * plus snapshot mode to disable scan for now
215 */
216 mt9v022->chip_control |= 0x10;
217 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
218 if (!ret)
219 ret = reg_write(client, MT9V022_READ_MODE, 0x300);
220
221 /* All defaults */
222 if (!ret)
223 /* AEC, AGC on */
224 ret = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x3);
225 if (!ret)
226 ret = reg_write(client, MT9V022_ANALOG_GAIN, 16);
227 if (!ret)
228 ret = reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH, 480);
229 if (!ret)
230 ret = reg_write(client, mt9v022->reg->max_total_shutter_width, 480);
231 if (!ret)
232 /* default - auto */
233 ret = reg_clear(client, MT9V022_BLACK_LEVEL_CALIB_CTRL, 1);
234 if (!ret)
235 ret = reg_write(client, MT9V022_DIGITAL_TEST_PATTERN, 0);
236 if (!ret)
237 return v4l2_ctrl_handler_setup(&mt9v022->hdl);
238
239 return ret;
240 }
241
242 static int mt9v022_s_stream(struct v4l2_subdev *sd, int enable)
243 {
244 struct i2c_client *client = v4l2_get_subdevdata(sd);
245 struct mt9v022 *mt9v022 = to_mt9v022(client);
246
247 if (enable) {
248 /* Switch to master "normal" mode */
249 mt9v022->chip_control &= ~0x10;
250 if (is_mt9v022_rev3(mt9v022->chip_version) ||
251 is_mt9v024(mt9v022->chip_version)) {
252 /*
253 * Unset snapshot mode specific settings: clear bit 9
254 * and bit 2 in reg. 0x20 when in normal mode.
255 */
256 if (reg_clear(client, MT9V022_REG32, 0x204))
257 return -EIO;
258 }
259 } else {
260 /* Switch to snapshot mode */
261 mt9v022->chip_control |= 0x10;
262 if (is_mt9v022_rev3(mt9v022->chip_version) ||
263 is_mt9v024(mt9v022->chip_version)) {
264 /*
265 * Required settings for snapshot mode: set bit 9
266 * (RST enable) and bit 2 (CR enable) in reg. 0x20
267 * See TechNote TN0960 or TN-09-225.
268 */
269 if (reg_set(client, MT9V022_REG32, 0x204))
270 return -EIO;
271 }
272 }
273
274 if (reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control) < 0)
275 return -EIO;
276 return 0;
277 }
278
279 static int mt9v022_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a)
280 {
281 struct i2c_client *client = v4l2_get_subdevdata(sd);
282 struct mt9v022 *mt9v022 = to_mt9v022(client);
283 struct v4l2_rect rect = a->c;
284 int min_row, min_blank;
285 int ret;
286
287 /* Bayer format - even size lengths */
288 if (mt9v022->fmts == mt9v022_colour_fmts) {
289 rect.width = ALIGN(rect.width, 2);
290 rect.height = ALIGN(rect.height, 2);
291 /* Let the user play with the starting pixel */
292 }
293
294 soc_camera_limit_side(&rect.left, &rect.width,
295 MT9V022_COLUMN_SKIP, MT9V022_MIN_WIDTH, MT9V022_MAX_WIDTH);
296
297 soc_camera_limit_side(&rect.top, &rect.height,
298 MT9V022_ROW_SKIP, MT9V022_MIN_HEIGHT, MT9V022_MAX_HEIGHT);
299
300 /* Like in example app. Contradicts the datasheet though */
301 ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
302 if (ret >= 0) {
303 if (ret & 1) /* Autoexposure */
304 ret = reg_write(client, mt9v022->reg->max_total_shutter_width,
305 rect.height + mt9v022->y_skip_top + 43);
306 /*
307 * If autoexposure is off, there is no need to set
308 * MT9V022_TOTAL_SHUTTER_WIDTH here. Autoexposure can be off
309 * only if the user has set exposure manually, using the
310 * V4L2_CID_EXPOSURE_AUTO with the value V4L2_EXPOSURE_MANUAL.
311 * In this case the register MT9V022_TOTAL_SHUTTER_WIDTH
312 * already contains the correct value.
313 */
314 }
315 /* Setup frame format: defaults apart from width and height */
316 if (!ret)
317 ret = reg_write(client, MT9V022_COLUMN_START, rect.left);
318 if (!ret)
319 ret = reg_write(client, MT9V022_ROW_START, rect.top);
320 /*
321 * mt9v022: min total row time is 660 columns, min blanking is 43
322 * mt9v024: min total row time is 690 columns, min blanking is 61
323 */
324 if (is_mt9v024(mt9v022->chip_version)) {
325 min_row = 690;
326 min_blank = 61;
327 } else {
328 min_row = 660;
329 min_blank = 43;
330 }
331 if (!ret)
332 ret = v4l2_ctrl_s_ctrl(mt9v022->hblank,
333 rect.width > min_row - min_blank ?
334 min_blank : min_row - rect.width);
335 if (!ret)
336 ret = v4l2_ctrl_s_ctrl(mt9v022->vblank, 45);
337 if (!ret)
338 ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect.width);
339 if (!ret)
340 ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
341 rect.height + mt9v022->y_skip_top);
342
343 if (ret < 0)
344 return ret;
345
346 dev_dbg(&client->dev, "Frame %dx%d pixel\n", rect.width, rect.height);
347
348 mt9v022->rect = rect;
349
350 return 0;
351 }
352
353 static int mt9v022_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
354 {
355 struct i2c_client *client = v4l2_get_subdevdata(sd);
356 struct mt9v022 *mt9v022 = to_mt9v022(client);
357
358 a->c = mt9v022->rect;
359 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
360
361 return 0;
362 }
363
364 static int mt9v022_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
365 {
366 a->bounds.left = MT9V022_COLUMN_SKIP;
367 a->bounds.top = MT9V022_ROW_SKIP;
368 a->bounds.width = MT9V022_MAX_WIDTH;
369 a->bounds.height = MT9V022_MAX_HEIGHT;
370 a->defrect = a->bounds;
371 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
372 a->pixelaspect.numerator = 1;
373 a->pixelaspect.denominator = 1;
374
375 return 0;
376 }
377
378 static int mt9v022_g_fmt(struct v4l2_subdev *sd,
379 struct v4l2_mbus_framefmt *mf)
380 {
381 struct i2c_client *client = v4l2_get_subdevdata(sd);
382 struct mt9v022 *mt9v022 = to_mt9v022(client);
383
384 mf->width = mt9v022->rect.width;
385 mf->height = mt9v022->rect.height;
386 mf->code = mt9v022->fmt->code;
387 mf->colorspace = mt9v022->fmt->colorspace;
388 mf->field = V4L2_FIELD_NONE;
389
390 return 0;
391 }
392
393 static int mt9v022_s_fmt(struct v4l2_subdev *sd,
394 struct v4l2_mbus_framefmt *mf)
395 {
396 struct i2c_client *client = v4l2_get_subdevdata(sd);
397 struct mt9v022 *mt9v022 = to_mt9v022(client);
398 struct v4l2_crop a = {
399 .c = {
400 .left = mt9v022->rect.left,
401 .top = mt9v022->rect.top,
402 .width = mf->width,
403 .height = mf->height,
404 },
405 };
406 int ret;
407
408 /*
409 * The caller provides a supported format, as verified per call to
410 * .try_mbus_fmt(), datawidth is from our supported format list
411 */
412 switch (mf->code) {
413 case V4L2_MBUS_FMT_Y8_1X8:
414 case V4L2_MBUS_FMT_Y10_1X10:
415 if (mt9v022->model != MT9V022IX7ATM)
416 return -EINVAL;
417 break;
418 case V4L2_MBUS_FMT_SBGGR8_1X8:
419 case V4L2_MBUS_FMT_SBGGR10_1X10:
420 if (mt9v022->model != MT9V022IX7ATC)
421 return -EINVAL;
422 break;
423 default:
424 return -EINVAL;
425 }
426
427 /* No support for scaling on this camera, just crop. */
428 ret = mt9v022_s_crop(sd, &a);
429 if (!ret) {
430 mf->width = mt9v022->rect.width;
431 mf->height = mt9v022->rect.height;
432 mt9v022->fmt = mt9v022_find_datafmt(mf->code,
433 mt9v022->fmts, mt9v022->num_fmts);
434 mf->colorspace = mt9v022->fmt->colorspace;
435 }
436
437 return ret;
438 }
439
440 static int mt9v022_try_fmt(struct v4l2_subdev *sd,
441 struct v4l2_mbus_framefmt *mf)
442 {
443 struct i2c_client *client = v4l2_get_subdevdata(sd);
444 struct mt9v022 *mt9v022 = to_mt9v022(client);
445 const struct mt9v022_datafmt *fmt;
446 int align = mf->code == V4L2_MBUS_FMT_SBGGR8_1X8 ||
447 mf->code == V4L2_MBUS_FMT_SBGGR10_1X10;
448
449 v4l_bound_align_image(&mf->width, MT9V022_MIN_WIDTH,
450 MT9V022_MAX_WIDTH, align,
451 &mf->height, MT9V022_MIN_HEIGHT + mt9v022->y_skip_top,
452 MT9V022_MAX_HEIGHT + mt9v022->y_skip_top, align, 0);
453
454 fmt = mt9v022_find_datafmt(mf->code, mt9v022->fmts,
455 mt9v022->num_fmts);
456 if (!fmt) {
457 fmt = mt9v022->fmt;
458 mf->code = fmt->code;
459 }
460
461 mf->colorspace = fmt->colorspace;
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->reg > 0xff)
473 return -EINVAL;
474
475 reg->size = 2;
476 reg->val = reg_read(client, reg->reg);
477
478 if (reg->val > 0xffff)
479 return -EIO;
480
481 return 0;
482 }
483
484 static int mt9v022_s_register(struct v4l2_subdev *sd,
485 const struct v4l2_dbg_register *reg)
486 {
487 struct i2c_client *client = v4l2_get_subdevdata(sd);
488
489 if (reg->reg > 0xff)
490 return -EINVAL;
491
492 if (reg_write(client, reg->reg, reg->val) < 0)
493 return -EIO;
494
495 return 0;
496 }
497 #endif
498
499 static int mt9v022_s_power(struct v4l2_subdev *sd, int on)
500 {
501 struct i2c_client *client = v4l2_get_subdevdata(sd);
502 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
503 struct mt9v022 *mt9v022 = to_mt9v022(client);
504
505 return soc_camera_set_power(&client->dev, ssdd, mt9v022->clk, on);
506 }
507
508 static int mt9v022_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
509 {
510 struct mt9v022 *mt9v022 = container_of(ctrl->handler,
511 struct mt9v022, hdl);
512 struct v4l2_subdev *sd = &mt9v022->subdev;
513 struct i2c_client *client = v4l2_get_subdevdata(sd);
514 struct v4l2_ctrl *gain = mt9v022->gain;
515 struct v4l2_ctrl *exp = mt9v022->exposure;
516 unsigned long range;
517 int data;
518
519 switch (ctrl->id) {
520 case V4L2_CID_AUTOGAIN:
521 data = reg_read(client, MT9V022_ANALOG_GAIN);
522 if (data < 0)
523 return -EIO;
524
525 range = gain->maximum - gain->minimum;
526 gain->val = ((data - 16) * range + 24) / 48 + gain->minimum;
527 return 0;
528 case V4L2_CID_EXPOSURE_AUTO:
529 data = reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH);
530 if (data < 0)
531 return -EIO;
532
533 range = exp->maximum - exp->minimum;
534 exp->val = ((data - 1) * range + 239) / 479 + exp->minimum;
535 return 0;
536 case V4L2_CID_HBLANK:
537 data = reg_read(client, MT9V022_HORIZONTAL_BLANKING);
538 if (data < 0)
539 return -EIO;
540 ctrl->val = data;
541 return 0;
542 case V4L2_CID_VBLANK:
543 data = reg_read(client, MT9V022_VERTICAL_BLANKING);
544 if (data < 0)
545 return -EIO;
546 ctrl->val = data;
547 return 0;
548 }
549 return -EINVAL;
550 }
551
552 static int mt9v022_s_ctrl(struct v4l2_ctrl *ctrl)
553 {
554 struct mt9v022 *mt9v022 = container_of(ctrl->handler,
555 struct mt9v022, hdl);
556 struct v4l2_subdev *sd = &mt9v022->subdev;
557 struct i2c_client *client = v4l2_get_subdevdata(sd);
558 int data;
559
560 switch (ctrl->id) {
561 case V4L2_CID_VFLIP:
562 if (ctrl->val)
563 data = reg_set(client, MT9V022_READ_MODE, 0x10);
564 else
565 data = reg_clear(client, MT9V022_READ_MODE, 0x10);
566 if (data < 0)
567 return -EIO;
568 return 0;
569 case V4L2_CID_HFLIP:
570 if (ctrl->val)
571 data = reg_set(client, MT9V022_READ_MODE, 0x20);
572 else
573 data = reg_clear(client, MT9V022_READ_MODE, 0x20);
574 if (data < 0)
575 return -EIO;
576 return 0;
577 case V4L2_CID_AUTOGAIN:
578 if (ctrl->val) {
579 if (reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
580 return -EIO;
581 } else {
582 struct v4l2_ctrl *gain = mt9v022->gain;
583 /* mt9v022 has minimum == default */
584 unsigned long range = gain->maximum - gain->minimum;
585 /* Valid values 16 to 64, 32 to 64 must be even. */
586 unsigned long gain_val = ((gain->val - gain->minimum) *
587 48 + range / 2) / range + 16;
588
589 if (gain_val >= 32)
590 gain_val &= ~1;
591
592 /*
593 * The user wants to set gain manually, hope, she
594 * knows, what she's doing... Switch AGC off.
595 */
596 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
597 return -EIO;
598
599 dev_dbg(&client->dev, "Setting gain from %d to %lu\n",
600 reg_read(client, MT9V022_ANALOG_GAIN), gain_val);
601 if (reg_write(client, MT9V022_ANALOG_GAIN, gain_val) < 0)
602 return -EIO;
603 }
604 return 0;
605 case V4L2_CID_EXPOSURE_AUTO:
606 if (ctrl->val == V4L2_EXPOSURE_AUTO) {
607 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
608 } else {
609 struct v4l2_ctrl *exp = mt9v022->exposure;
610 unsigned long range = exp->maximum - exp->minimum;
611 unsigned long shutter = ((exp->val - exp->minimum) *
612 479 + range / 2) / range + 1;
613
614 /*
615 * The user wants to set shutter width manually, hope,
616 * she knows, what she's doing... Switch AEC off.
617 */
618 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
619 if (data < 0)
620 return -EIO;
621 dev_dbg(&client->dev, "Shutter width from %d to %lu\n",
622 reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
623 shutter);
624 if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
625 shutter) < 0)
626 return -EIO;
627 }
628 return 0;
629 case V4L2_CID_HBLANK:
630 if (reg_write(client, MT9V022_HORIZONTAL_BLANKING,
631 ctrl->val) < 0)
632 return -EIO;
633 return 0;
634 case V4L2_CID_VBLANK:
635 if (reg_write(client, MT9V022_VERTICAL_BLANKING,
636 ctrl->val) < 0)
637 return -EIO;
638 return 0;
639 }
640 return -EINVAL;
641 }
642
643 /*
644 * Interface active, can use i2c. If it fails, it can indeed mean, that
645 * this wasn't our capture interface, so, we wait for the right one
646 */
647 static int mt9v022_video_probe(struct i2c_client *client)
648 {
649 struct mt9v022 *mt9v022 = to_mt9v022(client);
650 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
651 s32 data;
652 int ret;
653 unsigned long flags;
654
655 ret = mt9v022_s_power(&mt9v022->subdev, 1);
656 if (ret < 0)
657 return ret;
658
659 /* Read out the chip version register */
660 data = reg_read(client, MT9V022_CHIP_VERSION);
661
662 /* must be 0x1311, 0x1313 or 0x1324 */
663 if (data != 0x1311 && data != 0x1313 && data != 0x1324) {
664 ret = -ENODEV;
665 dev_info(&client->dev, "No MT9V022 found, ID register 0x%x\n",
666 data);
667 goto ei2c;
668 }
669
670 mt9v022->chip_version = data;
671
672 mt9v022->reg = is_mt9v024(data) ? &mt9v024_register :
673 &mt9v022_register;
674
675 /* Soft reset */
676 ret = reg_write(client, MT9V022_RESET, 1);
677 if (ret < 0)
678 goto ei2c;
679 /* 15 clock cycles */
680 udelay(200);
681 if (reg_read(client, MT9V022_RESET)) {
682 dev_err(&client->dev, "Resetting MT9V022 failed!\n");
683 if (ret > 0)
684 ret = -EIO;
685 goto ei2c;
686 }
687
688 /* Set monochrome or colour sensor type */
689 if (sensor_type && (!strcmp("colour", sensor_type) ||
690 !strcmp("color", sensor_type))) {
691 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
692 mt9v022->model = MT9V022IX7ATC;
693 mt9v022->fmts = mt9v022_colour_fmts;
694 } else {
695 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
696 mt9v022->model = MT9V022IX7ATM;
697 mt9v022->fmts = mt9v022_monochrome_fmts;
698 }
699
700 if (ret < 0)
701 goto ei2c;
702
703 mt9v022->num_fmts = 0;
704
705 /*
706 * This is a 10bit sensor, so by default we only allow 10bit.
707 * The platform may support different bus widths due to
708 * different routing of the data lines.
709 */
710 if (ssdd->query_bus_param)
711 flags = ssdd->query_bus_param(ssdd);
712 else
713 flags = SOCAM_DATAWIDTH_10;
714
715 if (flags & SOCAM_DATAWIDTH_10)
716 mt9v022->num_fmts++;
717 else
718 mt9v022->fmts++;
719
720 if (flags & SOCAM_DATAWIDTH_8)
721 mt9v022->num_fmts++;
722
723 mt9v022->fmt = &mt9v022->fmts[0];
724
725 dev_info(&client->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
726 data, mt9v022->model == MT9V022IX7ATM ?
727 "monochrome" : "colour");
728
729 ret = mt9v022_init(client);
730 if (ret < 0)
731 dev_err(&client->dev, "Failed to initialise the camera\n");
732
733 ei2c:
734 mt9v022_s_power(&mt9v022->subdev, 0);
735 return ret;
736 }
737
738 static int mt9v022_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
739 {
740 struct i2c_client *client = v4l2_get_subdevdata(sd);
741 struct mt9v022 *mt9v022 = to_mt9v022(client);
742
743 *lines = mt9v022->y_skip_top;
744
745 return 0;
746 }
747
748 static const struct v4l2_ctrl_ops mt9v022_ctrl_ops = {
749 .g_volatile_ctrl = mt9v022_g_volatile_ctrl,
750 .s_ctrl = mt9v022_s_ctrl,
751 };
752
753 static struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
754 #ifdef CONFIG_VIDEO_ADV_DEBUG
755 .g_register = mt9v022_g_register,
756 .s_register = mt9v022_s_register,
757 #endif
758 .s_power = mt9v022_s_power,
759 };
760
761 static int mt9v022_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
762 enum v4l2_mbus_pixelcode *code)
763 {
764 struct i2c_client *client = v4l2_get_subdevdata(sd);
765 struct mt9v022 *mt9v022 = to_mt9v022(client);
766
767 if (index >= mt9v022->num_fmts)
768 return -EINVAL;
769
770 *code = mt9v022->fmts[index].code;
771 return 0;
772 }
773
774 static int mt9v022_g_mbus_config(struct v4l2_subdev *sd,
775 struct v4l2_mbus_config *cfg)
776 {
777 struct i2c_client *client = v4l2_get_subdevdata(sd);
778 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
779
780 cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_SLAVE |
781 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
782 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
783 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
784 V4L2_MBUS_DATA_ACTIVE_HIGH;
785 cfg->type = V4L2_MBUS_PARALLEL;
786 cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
787
788 return 0;
789 }
790
791 static int mt9v022_s_mbus_config(struct v4l2_subdev *sd,
792 const struct v4l2_mbus_config *cfg)
793 {
794 struct i2c_client *client = v4l2_get_subdevdata(sd);
795 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
796 struct mt9v022 *mt9v022 = to_mt9v022(client);
797 unsigned long flags = soc_camera_apply_board_flags(ssdd, cfg);
798 unsigned int bps = soc_mbus_get_fmtdesc(mt9v022->fmt->code)->bits_per_sample;
799 int ret;
800 u16 pixclk = 0;
801
802 if (ssdd->set_bus_param) {
803 ret = ssdd->set_bus_param(ssdd, 1 << (bps - 1));
804 if (ret)
805 return ret;
806 } else if (bps != 10) {
807 /*
808 * Without board specific bus width settings we only support the
809 * sensors native bus width
810 */
811 return -EINVAL;
812 }
813
814 if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
815 pixclk |= 0x10;
816
817 if (!(flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH))
818 pixclk |= 0x1;
819
820 if (!(flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH))
821 pixclk |= 0x2;
822
823 ret = reg_write(client, mt9v022->reg->pixclk_fv_lv, pixclk);
824 if (ret < 0)
825 return ret;
826
827 if (!(flags & V4L2_MBUS_MASTER))
828 mt9v022->chip_control &= ~0x8;
829
830 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
831 if (ret < 0)
832 return ret;
833
834 dev_dbg(&client->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
835 pixclk, mt9v022->chip_control);
836
837 return 0;
838 }
839
840 static struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
841 .s_stream = mt9v022_s_stream,
842 .s_mbus_fmt = mt9v022_s_fmt,
843 .g_mbus_fmt = mt9v022_g_fmt,
844 .try_mbus_fmt = mt9v022_try_fmt,
845 .s_crop = mt9v022_s_crop,
846 .g_crop = mt9v022_g_crop,
847 .cropcap = mt9v022_cropcap,
848 .enum_mbus_fmt = mt9v022_enum_fmt,
849 .g_mbus_config = mt9v022_g_mbus_config,
850 .s_mbus_config = mt9v022_s_mbus_config,
851 };
852
853 static struct v4l2_subdev_sensor_ops mt9v022_subdev_sensor_ops = {
854 .g_skip_top_lines = mt9v022_g_skip_top_lines,
855 };
856
857 static struct v4l2_subdev_ops mt9v022_subdev_ops = {
858 .core = &mt9v022_subdev_core_ops,
859 .video = &mt9v022_subdev_video_ops,
860 .sensor = &mt9v022_subdev_sensor_ops,
861 };
862
863 static int mt9v022_probe(struct i2c_client *client,
864 const struct i2c_device_id *did)
865 {
866 struct mt9v022 *mt9v022;
867 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
868 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
869 struct mt9v022_platform_data *pdata;
870 int ret;
871
872 if (!ssdd) {
873 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
874 return -EINVAL;
875 }
876
877 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
878 dev_warn(&adapter->dev,
879 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
880 return -EIO;
881 }
882
883 mt9v022 = devm_kzalloc(&client->dev, sizeof(struct mt9v022), GFP_KERNEL);
884 if (!mt9v022)
885 return -ENOMEM;
886
887 pdata = ssdd->drv_priv;
888 v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
889 v4l2_ctrl_handler_init(&mt9v022->hdl, 6);
890 v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
891 V4L2_CID_VFLIP, 0, 1, 1, 0);
892 v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
893 V4L2_CID_HFLIP, 0, 1, 1, 0);
894 mt9v022->autogain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
895 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
896 mt9v022->gain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
897 V4L2_CID_GAIN, 0, 127, 1, 64);
898
899 /*
900 * Simulated autoexposure. If enabled, we calculate shutter width
901 * ourselves in the driver based on vertical blanking and frame width
902 */
903 mt9v022->autoexposure = v4l2_ctrl_new_std_menu(&mt9v022->hdl,
904 &mt9v022_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
905 V4L2_EXPOSURE_AUTO);
906 mt9v022->exposure = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
907 V4L2_CID_EXPOSURE, 1, 255, 1, 255);
908
909 mt9v022->hblank = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
910 V4L2_CID_HBLANK, MT9V022_HORIZONTAL_BLANKING_MIN,
911 MT9V022_HORIZONTAL_BLANKING_MAX, 1,
912 MT9V022_HORIZONTAL_BLANKING_DEF);
913
914 mt9v022->vblank = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
915 V4L2_CID_VBLANK, MT9V022_VERTICAL_BLANKING_MIN,
916 MT9V022_VERTICAL_BLANKING_MAX, 1,
917 MT9V022_VERTICAL_BLANKING_DEF);
918
919 mt9v022->subdev.ctrl_handler = &mt9v022->hdl;
920 if (mt9v022->hdl.error) {
921 int err = mt9v022->hdl.error;
922
923 dev_err(&client->dev, "control initialisation err %d\n", err);
924 return err;
925 }
926 v4l2_ctrl_auto_cluster(2, &mt9v022->autoexposure,
927 V4L2_EXPOSURE_MANUAL, true);
928 v4l2_ctrl_auto_cluster(2, &mt9v022->autogain, 0, true);
929
930 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
931
932 /*
933 * On some platforms the first read out line is corrupted.
934 * Workaround it by skipping if indicated by platform data.
935 */
936 mt9v022->y_skip_top = pdata ? pdata->y_skip_top : 0;
937 mt9v022->rect.left = MT9V022_COLUMN_SKIP;
938 mt9v022->rect.top = MT9V022_ROW_SKIP;
939 mt9v022->rect.width = MT9V022_MAX_WIDTH;
940 mt9v022->rect.height = MT9V022_MAX_HEIGHT;
941
942 mt9v022->clk = v4l2_clk_get(&client->dev, "mclk");
943 if (IS_ERR(mt9v022->clk)) {
944 ret = PTR_ERR(mt9v022->clk);
945 goto eclkget;
946 }
947
948 ret = mt9v022_video_probe(client);
949 if (ret) {
950 v4l2_clk_put(mt9v022->clk);
951 eclkget:
952 v4l2_ctrl_handler_free(&mt9v022->hdl);
953 }
954
955 return ret;
956 }
957
958 static int mt9v022_remove(struct i2c_client *client)
959 {
960 struct mt9v022 *mt9v022 = to_mt9v022(client);
961 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
962
963 v4l2_clk_put(mt9v022->clk);
964 v4l2_device_unregister_subdev(&mt9v022->subdev);
965 if (ssdd->free_bus)
966 ssdd->free_bus(ssdd);
967 v4l2_ctrl_handler_free(&mt9v022->hdl);
968
969 return 0;
970 }
971 static const struct i2c_device_id mt9v022_id[] = {
972 { "mt9v022", 0 },
973 { }
974 };
975 MODULE_DEVICE_TABLE(i2c, mt9v022_id);
976
977 static struct i2c_driver mt9v022_i2c_driver = {
978 .driver = {
979 .name = "mt9v022",
980 },
981 .probe = mt9v022_probe,
982 .remove = mt9v022_remove,
983 .id_table = mt9v022_id,
984 };
985
986 module_i2c_driver(mt9v022_i2c_driver);
987
988 MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
989 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
990 MODULE_LICENSE("GPL");
Linux with added FPC-III support