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 u32 code;
89 enum v4l2_colorspace colorspace;
90 };
91
92 /* Find a data format by a pixel code in an array */
mt9v022_find_datafmt(u32 code,const struct mt9v022_datafmt * fmt,int n)93 static const struct mt9v022_datafmt *mt9v022_find_datafmt(
94 u32 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 {MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_COLORSPACE_SRGB},
111 {MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_COLORSPACE_SRGB},
112 };
113
114 static const struct mt9v022_datafmt mt9v022_monochrome_fmts[] = {
115 /* Order important - see above */
116 {MEDIA_BUS_FMT_Y10_1X10, V4L2_COLORSPACE_JPEG},
117 {MEDIA_BUS_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
to_mt9v022(const struct i2c_client * client)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
reg_read(struct i2c_client * client,const u8 reg)173 static int reg_read(struct i2c_client *client, const u8 reg)
174 {
175 return i2c_smbus_read_word_swapped(client, reg);
176 }
177
reg_write(struct i2c_client * client,const u8 reg,const u16 data)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
reg_set(struct i2c_client * client,const u8 reg,const u16 data)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
reg_clear(struct i2c_client * client,const u8 reg,const u16 data)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
mt9v022_init(struct i2c_client * client)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
mt9v022_s_stream(struct v4l2_subdev * sd,int enable)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
mt9v022_s_crop(struct v4l2_subdev * sd,const struct v4l2_crop * a)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
mt9v022_g_crop(struct v4l2_subdev * sd,struct v4l2_crop * a)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
mt9v022_cropcap(struct v4l2_subdev * sd,struct v4l2_cropcap * a)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
mt9v022_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)378 static int mt9v022_get_fmt(struct v4l2_subdev *sd,
379 struct v4l2_subdev_pad_config *cfg,
380 struct v4l2_subdev_format *format)
381 {
382 struct v4l2_mbus_framefmt *mf = &format->format;
383 struct i2c_client *client = v4l2_get_subdevdata(sd);
384 struct mt9v022 *mt9v022 = to_mt9v022(client);
385
386 if (format->pad)
387 return -EINVAL;
388
389 mf->width = mt9v022->rect.width;
390 mf->height = mt9v022->rect.height;
391 mf->code = mt9v022->fmt->code;
392 mf->colorspace = mt9v022->fmt->colorspace;
393 mf->field = V4L2_FIELD_NONE;
394
395 return 0;
396 }
397
mt9v022_s_fmt(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * mf)398 static int mt9v022_s_fmt(struct v4l2_subdev *sd,
399 struct v4l2_mbus_framefmt *mf)
400 {
401 struct i2c_client *client = v4l2_get_subdevdata(sd);
402 struct mt9v022 *mt9v022 = to_mt9v022(client);
403 struct v4l2_crop a = {
404 .c = {
405 .left = mt9v022->rect.left,
406 .top = mt9v022->rect.top,
407 .width = mf->width,
408 .height = mf->height,
409 },
410 };
411 int ret;
412
413 /*
414 * The caller provides a supported format, as verified per call to
415 * .set_fmt(FORMAT_TRY), datawidth is from our supported format list
416 */
417 switch (mf->code) {
418 case MEDIA_BUS_FMT_Y8_1X8:
419 case MEDIA_BUS_FMT_Y10_1X10:
420 if (mt9v022->model != MT9V022IX7ATM)
421 return -EINVAL;
422 break;
423 case MEDIA_BUS_FMT_SBGGR8_1X8:
424 case MEDIA_BUS_FMT_SBGGR10_1X10:
425 if (mt9v022->model != MT9V022IX7ATC)
426 return -EINVAL;
427 break;
428 default:
429 return -EINVAL;
430 }
431
432 /* No support for scaling on this camera, just crop. */
433 ret = mt9v022_s_crop(sd, &a);
434 if (!ret) {
435 mf->width = mt9v022->rect.width;
436 mf->height = mt9v022->rect.height;
437 mt9v022->fmt = mt9v022_find_datafmt(mf->code,
438 mt9v022->fmts, mt9v022->num_fmts);
439 mf->colorspace = mt9v022->fmt->colorspace;
440 }
441
442 return ret;
443 }
444
mt9v022_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)445 static int mt9v022_set_fmt(struct v4l2_subdev *sd,
446 struct v4l2_subdev_pad_config *cfg,
447 struct v4l2_subdev_format *format)
448 {
449 struct v4l2_mbus_framefmt *mf = &format->format;
450 struct i2c_client *client = v4l2_get_subdevdata(sd);
451 struct mt9v022 *mt9v022 = to_mt9v022(client);
452 const struct mt9v022_datafmt *fmt;
453 int align = mf->code == MEDIA_BUS_FMT_SBGGR8_1X8 ||
454 mf->code == MEDIA_BUS_FMT_SBGGR10_1X10;
455
456 if (format->pad)
457 return -EINVAL;
458
459 v4l_bound_align_image(&mf->width, MT9V022_MIN_WIDTH,
460 MT9V022_MAX_WIDTH, align,
461 &mf->height, MT9V022_MIN_HEIGHT + mt9v022->y_skip_top,
462 MT9V022_MAX_HEIGHT + mt9v022->y_skip_top, align, 0);
463
464 fmt = mt9v022_find_datafmt(mf->code, mt9v022->fmts,
465 mt9v022->num_fmts);
466 if (!fmt) {
467 fmt = mt9v022->fmt;
468 mf->code = fmt->code;
469 }
470
471 mf->colorspace = fmt->colorspace;
472
473 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
474 return mt9v022_s_fmt(sd, mf);
475 cfg->try_fmt = *mf;
476 return 0;
477 }
478
479 #ifdef CONFIG_VIDEO_ADV_DEBUG
mt9v022_g_register(struct v4l2_subdev * sd,struct v4l2_dbg_register * reg)480 static int mt9v022_g_register(struct v4l2_subdev *sd,
481 struct v4l2_dbg_register *reg)
482 {
483 struct i2c_client *client = v4l2_get_subdevdata(sd);
484
485 if (reg->reg > 0xff)
486 return -EINVAL;
487
488 reg->size = 2;
489 reg->val = reg_read(client, reg->reg);
490
491 if (reg->val > 0xffff)
492 return -EIO;
493
494 return 0;
495 }
496
mt9v022_s_register(struct v4l2_subdev * sd,const struct v4l2_dbg_register * reg)497 static int mt9v022_s_register(struct v4l2_subdev *sd,
498 const struct v4l2_dbg_register *reg)
499 {
500 struct i2c_client *client = v4l2_get_subdevdata(sd);
501
502 if (reg->reg > 0xff)
503 return -EINVAL;
504
505 if (reg_write(client, reg->reg, reg->val) < 0)
506 return -EIO;
507
508 return 0;
509 }
510 #endif
511
mt9v022_s_power(struct v4l2_subdev * sd,int on)512 static int mt9v022_s_power(struct v4l2_subdev *sd, int on)
513 {
514 struct i2c_client *client = v4l2_get_subdevdata(sd);
515 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
516 struct mt9v022 *mt9v022 = to_mt9v022(client);
517
518 return soc_camera_set_power(&client->dev, ssdd, mt9v022->clk, on);
519 }
520
mt9v022_g_volatile_ctrl(struct v4l2_ctrl * ctrl)521 static int mt9v022_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
522 {
523 struct mt9v022 *mt9v022 = container_of(ctrl->handler,
524 struct mt9v022, hdl);
525 struct v4l2_subdev *sd = &mt9v022->subdev;
526 struct i2c_client *client = v4l2_get_subdevdata(sd);
527 struct v4l2_ctrl *gain = mt9v022->gain;
528 struct v4l2_ctrl *exp = mt9v022->exposure;
529 unsigned long range;
530 int data;
531
532 switch (ctrl->id) {
533 case V4L2_CID_AUTOGAIN:
534 data = reg_read(client, MT9V022_ANALOG_GAIN);
535 if (data < 0)
536 return -EIO;
537
538 range = gain->maximum - gain->minimum;
539 gain->val = ((data - 16) * range + 24) / 48 + gain->minimum;
540 return 0;
541 case V4L2_CID_EXPOSURE_AUTO:
542 data = reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH);
543 if (data < 0)
544 return -EIO;
545
546 range = exp->maximum - exp->minimum;
547 exp->val = ((data - 1) * range + 239) / 479 + exp->minimum;
548 return 0;
549 case V4L2_CID_HBLANK:
550 data = reg_read(client, MT9V022_HORIZONTAL_BLANKING);
551 if (data < 0)
552 return -EIO;
553 ctrl->val = data;
554 return 0;
555 case V4L2_CID_VBLANK:
556 data = reg_read(client, MT9V022_VERTICAL_BLANKING);
557 if (data < 0)
558 return -EIO;
559 ctrl->val = data;
560 return 0;
561 }
562 return -EINVAL;
563 }
564
mt9v022_s_ctrl(struct v4l2_ctrl * ctrl)565 static int mt9v022_s_ctrl(struct v4l2_ctrl *ctrl)
566 {
567 struct mt9v022 *mt9v022 = container_of(ctrl->handler,
568 struct mt9v022, hdl);
569 struct v4l2_subdev *sd = &mt9v022->subdev;
570 struct i2c_client *client = v4l2_get_subdevdata(sd);
571 int data;
572
573 switch (ctrl->id) {
574 case V4L2_CID_VFLIP:
575 if (ctrl->val)
576 data = reg_set(client, MT9V022_READ_MODE, 0x10);
577 else
578 data = reg_clear(client, MT9V022_READ_MODE, 0x10);
579 if (data < 0)
580 return -EIO;
581 return 0;
582 case V4L2_CID_HFLIP:
583 if (ctrl->val)
584 data = reg_set(client, MT9V022_READ_MODE, 0x20);
585 else
586 data = reg_clear(client, MT9V022_READ_MODE, 0x20);
587 if (data < 0)
588 return -EIO;
589 return 0;
590 case V4L2_CID_AUTOGAIN:
591 if (ctrl->val) {
592 if (reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
593 return -EIO;
594 } else {
595 struct v4l2_ctrl *gain = mt9v022->gain;
596 /* mt9v022 has minimum == default */
597 unsigned long range = gain->maximum - gain->minimum;
598 /* Valid values 16 to 64, 32 to 64 must be even. */
599 unsigned long gain_val = ((gain->val - (s32)gain->minimum) *
600 48 + range / 2) / range + 16;
601
602 if (gain_val >= 32)
603 gain_val &= ~1;
604
605 /*
606 * The user wants to set gain manually, hope, she
607 * knows, what she's doing... Switch AGC off.
608 */
609 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
610 return -EIO;
611
612 dev_dbg(&client->dev, "Setting gain from %d to %lu\n",
613 reg_read(client, MT9V022_ANALOG_GAIN), gain_val);
614 if (reg_write(client, MT9V022_ANALOG_GAIN, gain_val) < 0)
615 return -EIO;
616 }
617 return 0;
618 case V4L2_CID_EXPOSURE_AUTO:
619 if (ctrl->val == V4L2_EXPOSURE_AUTO) {
620 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
621 } else {
622 struct v4l2_ctrl *exp = mt9v022->exposure;
623 unsigned long range = exp->maximum - exp->minimum;
624 unsigned long shutter = ((exp->val - (s32)exp->minimum) *
625 479 + range / 2) / range + 1;
626
627 /*
628 * The user wants to set shutter width manually, hope,
629 * she knows, what she's doing... Switch AEC off.
630 */
631 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
632 if (data < 0)
633 return -EIO;
634 dev_dbg(&client->dev, "Shutter width from %d to %lu\n",
635 reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
636 shutter);
637 if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
638 shutter) < 0)
639 return -EIO;
640 }
641 return 0;
642 case V4L2_CID_HBLANK:
643 if (reg_write(client, MT9V022_HORIZONTAL_BLANKING,
644 ctrl->val) < 0)
645 return -EIO;
646 return 0;
647 case V4L2_CID_VBLANK:
648 if (reg_write(client, MT9V022_VERTICAL_BLANKING,
649 ctrl->val) < 0)
650 return -EIO;
651 return 0;
652 }
653 return -EINVAL;
654 }
655
656 /*
657 * Interface active, can use i2c. If it fails, it can indeed mean, that
658 * this wasn't our capture interface, so, we wait for the right one
659 */
mt9v022_video_probe(struct i2c_client * client)660 static int mt9v022_video_probe(struct i2c_client *client)
661 {
662 struct mt9v022 *mt9v022 = to_mt9v022(client);
663 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
664 s32 data;
665 int ret;
666 unsigned long flags;
667
668 ret = mt9v022_s_power(&mt9v022->subdev, 1);
669 if (ret < 0)
670 return ret;
671
672 /* Read out the chip version register */
673 data = reg_read(client, MT9V022_CHIP_VERSION);
674
675 /* must be 0x1311, 0x1313 or 0x1324 */
676 if (data != 0x1311 && data != 0x1313 && data != 0x1324) {
677 ret = -ENODEV;
678 dev_info(&client->dev, "No MT9V022 found, ID register 0x%x\n",
679 data);
680 goto ei2c;
681 }
682
683 mt9v022->chip_version = data;
684
685 mt9v022->reg = is_mt9v024(data) ? &mt9v024_register :
686 &mt9v022_register;
687
688 /* Soft reset */
689 ret = reg_write(client, MT9V022_RESET, 1);
690 if (ret < 0)
691 goto ei2c;
692 /* 15 clock cycles */
693 udelay(200);
694 if (reg_read(client, MT9V022_RESET)) {
695 dev_err(&client->dev, "Resetting MT9V022 failed!\n");
696 if (ret > 0)
697 ret = -EIO;
698 goto ei2c;
699 }
700
701 /* Set monochrome or colour sensor type */
702 if (sensor_type && (!strcmp("colour", sensor_type) ||
703 !strcmp("color", sensor_type))) {
704 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
705 mt9v022->model = MT9V022IX7ATC;
706 mt9v022->fmts = mt9v022_colour_fmts;
707 } else {
708 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
709 mt9v022->model = MT9V022IX7ATM;
710 mt9v022->fmts = mt9v022_monochrome_fmts;
711 }
712
713 if (ret < 0)
714 goto ei2c;
715
716 mt9v022->num_fmts = 0;
717
718 /*
719 * This is a 10bit sensor, so by default we only allow 10bit.
720 * The platform may support different bus widths due to
721 * different routing of the data lines.
722 */
723 if (ssdd->query_bus_param)
724 flags = ssdd->query_bus_param(ssdd);
725 else
726 flags = SOCAM_DATAWIDTH_10;
727
728 if (flags & SOCAM_DATAWIDTH_10)
729 mt9v022->num_fmts++;
730 else
731 mt9v022->fmts++;
732
733 if (flags & SOCAM_DATAWIDTH_8)
734 mt9v022->num_fmts++;
735
736 mt9v022->fmt = &mt9v022->fmts[0];
737
738 dev_info(&client->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
739 data, mt9v022->model == MT9V022IX7ATM ?
740 "monochrome" : "colour");
741
742 ret = mt9v022_init(client);
743 if (ret < 0)
744 dev_err(&client->dev, "Failed to initialise the camera\n");
745
746 ei2c:
747 mt9v022_s_power(&mt9v022->subdev, 0);
748 return ret;
749 }
750
mt9v022_g_skip_top_lines(struct v4l2_subdev * sd,u32 * lines)751 static int mt9v022_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
752 {
753 struct i2c_client *client = v4l2_get_subdevdata(sd);
754 struct mt9v022 *mt9v022 = to_mt9v022(client);
755
756 *lines = mt9v022->y_skip_top;
757
758 return 0;
759 }
760
761 static const struct v4l2_ctrl_ops mt9v022_ctrl_ops = {
762 .g_volatile_ctrl = mt9v022_g_volatile_ctrl,
763 .s_ctrl = mt9v022_s_ctrl,
764 };
765
766 static struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
767 #ifdef CONFIG_VIDEO_ADV_DEBUG
768 .g_register = mt9v022_g_register,
769 .s_register = mt9v022_s_register,
770 #endif
771 .s_power = mt9v022_s_power,
772 };
773
mt9v022_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_mbus_code_enum * code)774 static int mt9v022_enum_mbus_code(struct v4l2_subdev *sd,
775 struct v4l2_subdev_pad_config *cfg,
776 struct v4l2_subdev_mbus_code_enum *code)
777 {
778 struct i2c_client *client = v4l2_get_subdevdata(sd);
779 struct mt9v022 *mt9v022 = to_mt9v022(client);
780
781 if (code->pad || code->index >= mt9v022->num_fmts)
782 return -EINVAL;
783
784 code->code = mt9v022->fmts[code->index].code;
785 return 0;
786 }
787
mt9v022_g_mbus_config(struct v4l2_subdev * sd,struct v4l2_mbus_config * cfg)788 static int mt9v022_g_mbus_config(struct v4l2_subdev *sd,
789 struct v4l2_mbus_config *cfg)
790 {
791 struct i2c_client *client = v4l2_get_subdevdata(sd);
792 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
793
794 cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_SLAVE |
795 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
796 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
797 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
798 V4L2_MBUS_DATA_ACTIVE_HIGH;
799 cfg->type = V4L2_MBUS_PARALLEL;
800 cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
801
802 return 0;
803 }
804
mt9v022_s_mbus_config(struct v4l2_subdev * sd,const struct v4l2_mbus_config * cfg)805 static int mt9v022_s_mbus_config(struct v4l2_subdev *sd,
806 const struct v4l2_mbus_config *cfg)
807 {
808 struct i2c_client *client = v4l2_get_subdevdata(sd);
809 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
810 struct mt9v022 *mt9v022 = to_mt9v022(client);
811 unsigned long flags = soc_camera_apply_board_flags(ssdd, cfg);
812 unsigned int bps = soc_mbus_get_fmtdesc(mt9v022->fmt->code)->bits_per_sample;
813 int ret;
814 u16 pixclk = 0;
815
816 if (ssdd->set_bus_param) {
817 ret = ssdd->set_bus_param(ssdd, 1 << (bps - 1));
818 if (ret)
819 return ret;
820 } else if (bps != 10) {
821 /*
822 * Without board specific bus width settings we only support the
823 * sensors native bus width
824 */
825 return -EINVAL;
826 }
827
828 if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
829 pixclk |= 0x10;
830
831 if (!(flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH))
832 pixclk |= 0x1;
833
834 if (!(flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH))
835 pixclk |= 0x2;
836
837 ret = reg_write(client, mt9v022->reg->pixclk_fv_lv, pixclk);
838 if (ret < 0)
839 return ret;
840
841 if (!(flags & V4L2_MBUS_MASTER))
842 mt9v022->chip_control &= ~0x8;
843
844 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
845 if (ret < 0)
846 return ret;
847
848 dev_dbg(&client->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
849 pixclk, mt9v022->chip_control);
850
851 return 0;
852 }
853
854 static struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
855 .s_stream = mt9v022_s_stream,
856 .s_crop = mt9v022_s_crop,
857 .g_crop = mt9v022_g_crop,
858 .cropcap = mt9v022_cropcap,
859 .g_mbus_config = mt9v022_g_mbus_config,
860 .s_mbus_config = mt9v022_s_mbus_config,
861 };
862
863 static struct v4l2_subdev_sensor_ops mt9v022_subdev_sensor_ops = {
864 .g_skip_top_lines = mt9v022_g_skip_top_lines,
865 };
866
867 static const struct v4l2_subdev_pad_ops mt9v022_subdev_pad_ops = {
868 .enum_mbus_code = mt9v022_enum_mbus_code,
869 .get_fmt = mt9v022_get_fmt,
870 .set_fmt = mt9v022_set_fmt,
871 };
872
873 static struct v4l2_subdev_ops mt9v022_subdev_ops = {
874 .core = &mt9v022_subdev_core_ops,
875 .video = &mt9v022_subdev_video_ops,
876 .sensor = &mt9v022_subdev_sensor_ops,
877 .pad = &mt9v022_subdev_pad_ops,
878 };
879
mt9v022_probe(struct i2c_client * client,const struct i2c_device_id * did)880 static int mt9v022_probe(struct i2c_client *client,
881 const struct i2c_device_id *did)
882 {
883 struct mt9v022 *mt9v022;
884 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
885 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
886 struct mt9v022_platform_data *pdata;
887 int ret;
888
889 if (!ssdd) {
890 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
891 return -EINVAL;
892 }
893
894 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
895 dev_warn(&adapter->dev,
896 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
897 return -EIO;
898 }
899
900 mt9v022 = devm_kzalloc(&client->dev, sizeof(struct mt9v022), GFP_KERNEL);
901 if (!mt9v022)
902 return -ENOMEM;
903
904 pdata = ssdd->drv_priv;
905 v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
906 v4l2_ctrl_handler_init(&mt9v022->hdl, 6);
907 v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
908 V4L2_CID_VFLIP, 0, 1, 1, 0);
909 v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
910 V4L2_CID_HFLIP, 0, 1, 1, 0);
911 mt9v022->autogain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
912 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
913 mt9v022->gain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
914 V4L2_CID_GAIN, 0, 127, 1, 64);
915
916 /*
917 * Simulated autoexposure. If enabled, we calculate shutter width
918 * ourselves in the driver based on vertical blanking and frame width
919 */
920 mt9v022->autoexposure = v4l2_ctrl_new_std_menu(&mt9v022->hdl,
921 &mt9v022_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
922 V4L2_EXPOSURE_AUTO);
923 mt9v022->exposure = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
924 V4L2_CID_EXPOSURE, 1, 255, 1, 255);
925
926 mt9v022->hblank = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
927 V4L2_CID_HBLANK, MT9V022_HORIZONTAL_BLANKING_MIN,
928 MT9V022_HORIZONTAL_BLANKING_MAX, 1,
929 MT9V022_HORIZONTAL_BLANKING_DEF);
930
931 mt9v022->vblank = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
932 V4L2_CID_VBLANK, MT9V022_VERTICAL_BLANKING_MIN,
933 MT9V022_VERTICAL_BLANKING_MAX, 1,
934 MT9V022_VERTICAL_BLANKING_DEF);
935
936 mt9v022->subdev.ctrl_handler = &mt9v022->hdl;
937 if (mt9v022->hdl.error) {
938 int err = mt9v022->hdl.error;
939
940 dev_err(&client->dev, "control initialisation err %d\n", err);
941 return err;
942 }
943 v4l2_ctrl_auto_cluster(2, &mt9v022->autoexposure,
944 V4L2_EXPOSURE_MANUAL, true);
945 v4l2_ctrl_auto_cluster(2, &mt9v022->autogain, 0, true);
946
947 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
948
949 /*
950 * On some platforms the first read out line is corrupted.
951 * Workaround it by skipping if indicated by platform data.
952 */
953 mt9v022->y_skip_top = pdata ? pdata->y_skip_top : 0;
954 mt9v022->rect.left = MT9V022_COLUMN_SKIP;
955 mt9v022->rect.top = MT9V022_ROW_SKIP;
956 mt9v022->rect.width = MT9V022_MAX_WIDTH;
957 mt9v022->rect.height = MT9V022_MAX_HEIGHT;
958
959 mt9v022->clk = v4l2_clk_get(&client->dev, "mclk");
960 if (IS_ERR(mt9v022->clk)) {
961 ret = PTR_ERR(mt9v022->clk);
962 goto eclkget;
963 }
964
965 ret = mt9v022_video_probe(client);
966 if (ret) {
967 v4l2_clk_put(mt9v022->clk);
968 eclkget:
969 v4l2_ctrl_handler_free(&mt9v022->hdl);
970 }
971
972 return ret;
973 }
974
mt9v022_remove(struct i2c_client * client)975 static int mt9v022_remove(struct i2c_client *client)
976 {
977 struct mt9v022 *mt9v022 = to_mt9v022(client);
978 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
979
980 v4l2_clk_put(mt9v022->clk);
981 v4l2_device_unregister_subdev(&mt9v022->subdev);
982 if (ssdd->free_bus)
983 ssdd->free_bus(ssdd);
984 v4l2_ctrl_handler_free(&mt9v022->hdl);
985
986 return 0;
987 }
988 static const struct i2c_device_id mt9v022_id[] = {
989 { "mt9v022", 0 },
990 { }
991 };
992 MODULE_DEVICE_TABLE(i2c, mt9v022_id);
993
994 static struct i2c_driver mt9v022_i2c_driver = {
995 .driver = {
996 .name = "mt9v022",
997 },
998 .probe = mt9v022_probe,
999 .remove = mt9v022_remove,
1000 .id_table = mt9v022_id,
1001 };
1002
1003 module_i2c_driver(mt9v022_i2c_driver);
1004
1005 MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
1006 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
1007 MODULE_LICENSE("GPL");
1008