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/i2c/mt9v022.h>
19 #include <media/soc_camera.h>
20 #include <media/drv-intf/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_set_selection(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_selection * sel)279 static int mt9v022_set_selection(struct v4l2_subdev *sd,
280 struct v4l2_subdev_pad_config *cfg,
281 struct v4l2_subdev_selection *sel)
282 {
283 struct i2c_client *client = v4l2_get_subdevdata(sd);
284 struct mt9v022 *mt9v022 = to_mt9v022(client);
285 struct v4l2_rect rect = sel->r;
286 int min_row, min_blank;
287 int ret;
288
289 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
290 sel->target != V4L2_SEL_TGT_CROP)
291 return -EINVAL;
292
293 /* Bayer format - even size lengths */
294 if (mt9v022->fmts == mt9v022_colour_fmts) {
295 rect.width = ALIGN(rect.width, 2);
296 rect.height = ALIGN(rect.height, 2);
297 /* Let the user play with the starting pixel */
298 }
299
300 soc_camera_limit_side(&rect.left, &rect.width,
301 MT9V022_COLUMN_SKIP, MT9V022_MIN_WIDTH, MT9V022_MAX_WIDTH);
302
303 soc_camera_limit_side(&rect.top, &rect.height,
304 MT9V022_ROW_SKIP, MT9V022_MIN_HEIGHT, MT9V022_MAX_HEIGHT);
305
306 /* Like in example app. Contradicts the datasheet though */
307 ret = reg_read(client, MT9V022_AEC_AGC_ENABLE);
308 if (ret >= 0) {
309 if (ret & 1) /* Autoexposure */
310 ret = reg_write(client, mt9v022->reg->max_total_shutter_width,
311 rect.height + mt9v022->y_skip_top + 43);
312 /*
313 * If autoexposure is off, there is no need to set
314 * MT9V022_TOTAL_SHUTTER_WIDTH here. Autoexposure can be off
315 * only if the user has set exposure manually, using the
316 * V4L2_CID_EXPOSURE_AUTO with the value V4L2_EXPOSURE_MANUAL.
317 * In this case the register MT9V022_TOTAL_SHUTTER_WIDTH
318 * already contains the correct value.
319 */
320 }
321 /* Setup frame format: defaults apart from width and height */
322 if (!ret)
323 ret = reg_write(client, MT9V022_COLUMN_START, rect.left);
324 if (!ret)
325 ret = reg_write(client, MT9V022_ROW_START, rect.top);
326 /*
327 * mt9v022: min total row time is 660 columns, min blanking is 43
328 * mt9v024: min total row time is 690 columns, min blanking is 61
329 */
330 if (is_mt9v024(mt9v022->chip_version)) {
331 min_row = 690;
332 min_blank = 61;
333 } else {
334 min_row = 660;
335 min_blank = 43;
336 }
337 if (!ret)
338 ret = v4l2_ctrl_s_ctrl(mt9v022->hblank,
339 rect.width > min_row - min_blank ?
340 min_blank : min_row - rect.width);
341 if (!ret)
342 ret = v4l2_ctrl_s_ctrl(mt9v022->vblank, 45);
343 if (!ret)
344 ret = reg_write(client, MT9V022_WINDOW_WIDTH, rect.width);
345 if (!ret)
346 ret = reg_write(client, MT9V022_WINDOW_HEIGHT,
347 rect.height + mt9v022->y_skip_top);
348
349 if (ret < 0)
350 return ret;
351
352 dev_dbg(&client->dev, "Frame %dx%d pixel\n", rect.width, rect.height);
353
354 mt9v022->rect = rect;
355
356 return 0;
357 }
358
mt9v022_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_selection * sel)359 static int mt9v022_get_selection(struct v4l2_subdev *sd,
360 struct v4l2_subdev_pad_config *cfg,
361 struct v4l2_subdev_selection *sel)
362 {
363 struct i2c_client *client = v4l2_get_subdevdata(sd);
364 struct mt9v022 *mt9v022 = to_mt9v022(client);
365
366 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
367 return -EINVAL;
368
369 switch (sel->target) {
370 case V4L2_SEL_TGT_CROP_BOUNDS:
371 case V4L2_SEL_TGT_CROP_DEFAULT:
372 sel->r.left = MT9V022_COLUMN_SKIP;
373 sel->r.top = MT9V022_ROW_SKIP;
374 sel->r.width = MT9V022_MAX_WIDTH;
375 sel->r.height = MT9V022_MAX_HEIGHT;
376 return 0;
377 case V4L2_SEL_TGT_CROP:
378 sel->r = mt9v022->rect;
379 return 0;
380 default:
381 return -EINVAL;
382 }
383 }
384
mt9v022_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)385 static int mt9v022_get_fmt(struct v4l2_subdev *sd,
386 struct v4l2_subdev_pad_config *cfg,
387 struct v4l2_subdev_format *format)
388 {
389 struct v4l2_mbus_framefmt *mf = &format->format;
390 struct i2c_client *client = v4l2_get_subdevdata(sd);
391 struct mt9v022 *mt9v022 = to_mt9v022(client);
392
393 if (format->pad)
394 return -EINVAL;
395
396 mf->width = mt9v022->rect.width;
397 mf->height = mt9v022->rect.height;
398 mf->code = mt9v022->fmt->code;
399 mf->colorspace = mt9v022->fmt->colorspace;
400 mf->field = V4L2_FIELD_NONE;
401
402 return 0;
403 }
404
mt9v022_s_fmt(struct v4l2_subdev * sd,const struct mt9v022_datafmt * fmt,struct v4l2_mbus_framefmt * mf)405 static int mt9v022_s_fmt(struct v4l2_subdev *sd,
406 const struct mt9v022_datafmt *fmt,
407 struct v4l2_mbus_framefmt *mf)
408 {
409 struct i2c_client *client = v4l2_get_subdevdata(sd);
410 struct mt9v022 *mt9v022 = to_mt9v022(client);
411 struct v4l2_subdev_selection sel = {
412 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
413 .target = V4L2_SEL_TGT_CROP,
414 .r.left = mt9v022->rect.left,
415 .r.top = mt9v022->rect.top,
416 .r.width = mf->width,
417 .r.height = mf->height,
418 };
419 int ret;
420
421 /*
422 * The caller provides a supported format, as verified per call to
423 * .set_fmt(FORMAT_TRY), datawidth is from our supported format list
424 */
425 switch (mf->code) {
426 case MEDIA_BUS_FMT_Y8_1X8:
427 case MEDIA_BUS_FMT_Y10_1X10:
428 if (mt9v022->model != MT9V022IX7ATM)
429 return -EINVAL;
430 break;
431 case MEDIA_BUS_FMT_SBGGR8_1X8:
432 case MEDIA_BUS_FMT_SBGGR10_1X10:
433 if (mt9v022->model != MT9V022IX7ATC)
434 return -EINVAL;
435 break;
436 default:
437 return -EINVAL;
438 }
439
440 /* No support for scaling on this camera, just crop. */
441 ret = mt9v022_set_selection(sd, NULL, &sel);
442 if (!ret) {
443 mf->width = mt9v022->rect.width;
444 mf->height = mt9v022->rect.height;
445 mt9v022->fmt = fmt;
446 mf->colorspace = fmt->colorspace;
447 }
448
449 return ret;
450 }
451
mt9v022_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)452 static int mt9v022_set_fmt(struct v4l2_subdev *sd,
453 struct v4l2_subdev_pad_config *cfg,
454 struct v4l2_subdev_format *format)
455 {
456 struct v4l2_mbus_framefmt *mf = &format->format;
457 struct i2c_client *client = v4l2_get_subdevdata(sd);
458 struct mt9v022 *mt9v022 = to_mt9v022(client);
459 const struct mt9v022_datafmt *fmt;
460 int align = mf->code == MEDIA_BUS_FMT_SBGGR8_1X8 ||
461 mf->code == MEDIA_BUS_FMT_SBGGR10_1X10;
462
463 if (format->pad)
464 return -EINVAL;
465
466 v4l_bound_align_image(&mf->width, MT9V022_MIN_WIDTH,
467 MT9V022_MAX_WIDTH, align,
468 &mf->height, MT9V022_MIN_HEIGHT + mt9v022->y_skip_top,
469 MT9V022_MAX_HEIGHT + mt9v022->y_skip_top, align, 0);
470
471 fmt = mt9v022_find_datafmt(mf->code, mt9v022->fmts,
472 mt9v022->num_fmts);
473 if (!fmt) {
474 fmt = mt9v022->fmt;
475 mf->code = fmt->code;
476 }
477
478 mf->colorspace = fmt->colorspace;
479
480 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
481 return mt9v022_s_fmt(sd, fmt, mf);
482 cfg->try_fmt = *mf;
483 return 0;
484 }
485
486 #ifdef CONFIG_VIDEO_ADV_DEBUG
mt9v022_g_register(struct v4l2_subdev * sd,struct v4l2_dbg_register * reg)487 static int mt9v022_g_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->reg > 0xff)
493 return -EINVAL;
494
495 reg->size = 2;
496 reg->val = reg_read(client, reg->reg);
497
498 if (reg->val > 0xffff)
499 return -EIO;
500
501 return 0;
502 }
503
mt9v022_s_register(struct v4l2_subdev * sd,const struct v4l2_dbg_register * reg)504 static int mt9v022_s_register(struct v4l2_subdev *sd,
505 const struct v4l2_dbg_register *reg)
506 {
507 struct i2c_client *client = v4l2_get_subdevdata(sd);
508
509 if (reg->reg > 0xff)
510 return -EINVAL;
511
512 if (reg_write(client, reg->reg, reg->val) < 0)
513 return -EIO;
514
515 return 0;
516 }
517 #endif
518
mt9v022_s_power(struct v4l2_subdev * sd,int on)519 static int mt9v022_s_power(struct v4l2_subdev *sd, int on)
520 {
521 struct i2c_client *client = v4l2_get_subdevdata(sd);
522 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
523 struct mt9v022 *mt9v022 = to_mt9v022(client);
524
525 return soc_camera_set_power(&client->dev, ssdd, mt9v022->clk, on);
526 }
527
mt9v022_g_volatile_ctrl(struct v4l2_ctrl * ctrl)528 static int mt9v022_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
529 {
530 struct mt9v022 *mt9v022 = container_of(ctrl->handler,
531 struct mt9v022, hdl);
532 struct v4l2_subdev *sd = &mt9v022->subdev;
533 struct i2c_client *client = v4l2_get_subdevdata(sd);
534 struct v4l2_ctrl *gain = mt9v022->gain;
535 struct v4l2_ctrl *exp = mt9v022->exposure;
536 unsigned long range;
537 int data;
538
539 switch (ctrl->id) {
540 case V4L2_CID_AUTOGAIN:
541 data = reg_read(client, MT9V022_ANALOG_GAIN);
542 if (data < 0)
543 return -EIO;
544
545 range = gain->maximum - gain->minimum;
546 gain->val = ((data - 16) * range + 24) / 48 + gain->minimum;
547 return 0;
548 case V4L2_CID_EXPOSURE_AUTO:
549 data = reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH);
550 if (data < 0)
551 return -EIO;
552
553 range = exp->maximum - exp->minimum;
554 exp->val = ((data - 1) * range + 239) / 479 + exp->minimum;
555 return 0;
556 case V4L2_CID_HBLANK:
557 data = reg_read(client, MT9V022_HORIZONTAL_BLANKING);
558 if (data < 0)
559 return -EIO;
560 ctrl->val = data;
561 return 0;
562 case V4L2_CID_VBLANK:
563 data = reg_read(client, MT9V022_VERTICAL_BLANKING);
564 if (data < 0)
565 return -EIO;
566 ctrl->val = data;
567 return 0;
568 }
569 return -EINVAL;
570 }
571
mt9v022_s_ctrl(struct v4l2_ctrl * ctrl)572 static int mt9v022_s_ctrl(struct v4l2_ctrl *ctrl)
573 {
574 struct mt9v022 *mt9v022 = container_of(ctrl->handler,
575 struct mt9v022, hdl);
576 struct v4l2_subdev *sd = &mt9v022->subdev;
577 struct i2c_client *client = v4l2_get_subdevdata(sd);
578 int data;
579
580 switch (ctrl->id) {
581 case V4L2_CID_VFLIP:
582 if (ctrl->val)
583 data = reg_set(client, MT9V022_READ_MODE, 0x10);
584 else
585 data = reg_clear(client, MT9V022_READ_MODE, 0x10);
586 if (data < 0)
587 return -EIO;
588 return 0;
589 case V4L2_CID_HFLIP:
590 if (ctrl->val)
591 data = reg_set(client, MT9V022_READ_MODE, 0x20);
592 else
593 data = reg_clear(client, MT9V022_READ_MODE, 0x20);
594 if (data < 0)
595 return -EIO;
596 return 0;
597 case V4L2_CID_AUTOGAIN:
598 if (ctrl->val) {
599 if (reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
600 return -EIO;
601 } else {
602 struct v4l2_ctrl *gain = mt9v022->gain;
603 /* mt9v022 has minimum == default */
604 unsigned long range = gain->maximum - gain->minimum;
605 /* Valid values 16 to 64, 32 to 64 must be even. */
606 unsigned long gain_val = ((gain->val - (s32)gain->minimum) *
607 48 + range / 2) / range + 16;
608
609 if (gain_val >= 32)
610 gain_val &= ~1;
611
612 /*
613 * The user wants to set gain manually, hope, she
614 * knows, what she's doing... Switch AGC off.
615 */
616 if (reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x2) < 0)
617 return -EIO;
618
619 dev_dbg(&client->dev, "Setting gain from %d to %lu\n",
620 reg_read(client, MT9V022_ANALOG_GAIN), gain_val);
621 if (reg_write(client, MT9V022_ANALOG_GAIN, gain_val) < 0)
622 return -EIO;
623 }
624 return 0;
625 case V4L2_CID_EXPOSURE_AUTO:
626 if (ctrl->val == V4L2_EXPOSURE_AUTO) {
627 data = reg_set(client, MT9V022_AEC_AGC_ENABLE, 0x1);
628 } else {
629 struct v4l2_ctrl *exp = mt9v022->exposure;
630 unsigned long range = exp->maximum - exp->minimum;
631 unsigned long shutter = ((exp->val - (s32)exp->minimum) *
632 479 + range / 2) / range + 1;
633
634 /*
635 * The user wants to set shutter width manually, hope,
636 * she knows, what she's doing... Switch AEC off.
637 */
638 data = reg_clear(client, MT9V022_AEC_AGC_ENABLE, 0x1);
639 if (data < 0)
640 return -EIO;
641 dev_dbg(&client->dev, "Shutter width from %d to %lu\n",
642 reg_read(client, MT9V022_TOTAL_SHUTTER_WIDTH),
643 shutter);
644 if (reg_write(client, MT9V022_TOTAL_SHUTTER_WIDTH,
645 shutter) < 0)
646 return -EIO;
647 }
648 return 0;
649 case V4L2_CID_HBLANK:
650 if (reg_write(client, MT9V022_HORIZONTAL_BLANKING,
651 ctrl->val) < 0)
652 return -EIO;
653 return 0;
654 case V4L2_CID_VBLANK:
655 if (reg_write(client, MT9V022_VERTICAL_BLANKING,
656 ctrl->val) < 0)
657 return -EIO;
658 return 0;
659 }
660 return -EINVAL;
661 }
662
663 /*
664 * Interface active, can use i2c. If it fails, it can indeed mean, that
665 * this wasn't our capture interface, so, we wait for the right one
666 */
mt9v022_video_probe(struct i2c_client * client)667 static int mt9v022_video_probe(struct i2c_client *client)
668 {
669 struct mt9v022 *mt9v022 = to_mt9v022(client);
670 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
671 s32 data;
672 int ret;
673 unsigned long flags;
674
675 ret = mt9v022_s_power(&mt9v022->subdev, 1);
676 if (ret < 0)
677 return ret;
678
679 /* Read out the chip version register */
680 data = reg_read(client, MT9V022_CHIP_VERSION);
681
682 /* must be 0x1311, 0x1313 or 0x1324 */
683 if (data != 0x1311 && data != 0x1313 && data != 0x1324) {
684 ret = -ENODEV;
685 dev_info(&client->dev, "No MT9V022 found, ID register 0x%x\n",
686 data);
687 goto ei2c;
688 }
689
690 mt9v022->chip_version = data;
691
692 mt9v022->reg = is_mt9v024(data) ? &mt9v024_register :
693 &mt9v022_register;
694
695 /* Soft reset */
696 ret = reg_write(client, MT9V022_RESET, 1);
697 if (ret < 0)
698 goto ei2c;
699 /* 15 clock cycles */
700 udelay(200);
701 if (reg_read(client, MT9V022_RESET)) {
702 dev_err(&client->dev, "Resetting MT9V022 failed!\n");
703 if (ret > 0)
704 ret = -EIO;
705 goto ei2c;
706 }
707
708 /* Set monochrome or colour sensor type */
709 if (sensor_type && (!strcmp("colour", sensor_type) ||
710 !strcmp("color", sensor_type))) {
711 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 4 | 0x11);
712 mt9v022->model = MT9V022IX7ATC;
713 mt9v022->fmts = mt9v022_colour_fmts;
714 } else {
715 ret = reg_write(client, MT9V022_PIXEL_OPERATION_MODE, 0x11);
716 mt9v022->model = MT9V022IX7ATM;
717 mt9v022->fmts = mt9v022_monochrome_fmts;
718 }
719
720 if (ret < 0)
721 goto ei2c;
722
723 mt9v022->num_fmts = 0;
724
725 /*
726 * This is a 10bit sensor, so by default we only allow 10bit.
727 * The platform may support different bus widths due to
728 * different routing of the data lines.
729 */
730 if (ssdd->query_bus_param)
731 flags = ssdd->query_bus_param(ssdd);
732 else
733 flags = SOCAM_DATAWIDTH_10;
734
735 if (flags & SOCAM_DATAWIDTH_10)
736 mt9v022->num_fmts++;
737 else
738 mt9v022->fmts++;
739
740 if (flags & SOCAM_DATAWIDTH_8)
741 mt9v022->num_fmts++;
742
743 mt9v022->fmt = &mt9v022->fmts[0];
744
745 dev_info(&client->dev, "Detected a MT9V022 chip ID %x, %s sensor\n",
746 data, mt9v022->model == MT9V022IX7ATM ?
747 "monochrome" : "colour");
748
749 ret = mt9v022_init(client);
750 if (ret < 0)
751 dev_err(&client->dev, "Failed to initialise the camera\n");
752
753 ei2c:
754 mt9v022_s_power(&mt9v022->subdev, 0);
755 return ret;
756 }
757
mt9v022_g_skip_top_lines(struct v4l2_subdev * sd,u32 * lines)758 static int mt9v022_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines)
759 {
760 struct i2c_client *client = v4l2_get_subdevdata(sd);
761 struct mt9v022 *mt9v022 = to_mt9v022(client);
762
763 *lines = mt9v022->y_skip_top;
764
765 return 0;
766 }
767
768 static const struct v4l2_ctrl_ops mt9v022_ctrl_ops = {
769 .g_volatile_ctrl = mt9v022_g_volatile_ctrl,
770 .s_ctrl = mt9v022_s_ctrl,
771 };
772
773 static const struct v4l2_subdev_core_ops mt9v022_subdev_core_ops = {
774 #ifdef CONFIG_VIDEO_ADV_DEBUG
775 .g_register = mt9v022_g_register,
776 .s_register = mt9v022_s_register,
777 #endif
778 .s_power = mt9v022_s_power,
779 };
780
mt9v022_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_mbus_code_enum * code)781 static int mt9v022_enum_mbus_code(struct v4l2_subdev *sd,
782 struct v4l2_subdev_pad_config *cfg,
783 struct v4l2_subdev_mbus_code_enum *code)
784 {
785 struct i2c_client *client = v4l2_get_subdevdata(sd);
786 struct mt9v022 *mt9v022 = to_mt9v022(client);
787
788 if (code->pad || code->index >= mt9v022->num_fmts)
789 return -EINVAL;
790
791 code->code = mt9v022->fmts[code->index].code;
792 return 0;
793 }
794
mt9v022_g_mbus_config(struct v4l2_subdev * sd,struct v4l2_mbus_config * cfg)795 static int mt9v022_g_mbus_config(struct v4l2_subdev *sd,
796 struct v4l2_mbus_config *cfg)
797 {
798 struct i2c_client *client = v4l2_get_subdevdata(sd);
799 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
800
801 cfg->flags = V4L2_MBUS_MASTER | V4L2_MBUS_SLAVE |
802 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
803 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
804 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
805 V4L2_MBUS_DATA_ACTIVE_HIGH;
806 cfg->type = V4L2_MBUS_PARALLEL;
807 cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
808
809 return 0;
810 }
811
mt9v022_s_mbus_config(struct v4l2_subdev * sd,const struct v4l2_mbus_config * cfg)812 static int mt9v022_s_mbus_config(struct v4l2_subdev *sd,
813 const struct v4l2_mbus_config *cfg)
814 {
815 struct i2c_client *client = v4l2_get_subdevdata(sd);
816 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
817 struct mt9v022 *mt9v022 = to_mt9v022(client);
818 unsigned long flags = soc_camera_apply_board_flags(ssdd, cfg);
819 unsigned int bps = soc_mbus_get_fmtdesc(mt9v022->fmt->code)->bits_per_sample;
820 int ret;
821 u16 pixclk = 0;
822
823 if (ssdd->set_bus_param) {
824 ret = ssdd->set_bus_param(ssdd, 1 << (bps - 1));
825 if (ret)
826 return ret;
827 } else if (bps != 10) {
828 /*
829 * Without board specific bus width settings we only support the
830 * sensors native bus width
831 */
832 return -EINVAL;
833 }
834
835 if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
836 pixclk |= 0x10;
837
838 if (!(flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH))
839 pixclk |= 0x1;
840
841 if (!(flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH))
842 pixclk |= 0x2;
843
844 ret = reg_write(client, mt9v022->reg->pixclk_fv_lv, pixclk);
845 if (ret < 0)
846 return ret;
847
848 if (!(flags & V4L2_MBUS_MASTER))
849 mt9v022->chip_control &= ~0x8;
850
851 ret = reg_write(client, MT9V022_CHIP_CONTROL, mt9v022->chip_control);
852 if (ret < 0)
853 return ret;
854
855 dev_dbg(&client->dev, "Calculated pixclk 0x%x, chip control 0x%x\n",
856 pixclk, mt9v022->chip_control);
857
858 return 0;
859 }
860
861 static const struct v4l2_subdev_video_ops mt9v022_subdev_video_ops = {
862 .s_stream = mt9v022_s_stream,
863 .g_mbus_config = mt9v022_g_mbus_config,
864 .s_mbus_config = mt9v022_s_mbus_config,
865 };
866
867 static const struct v4l2_subdev_sensor_ops mt9v022_subdev_sensor_ops = {
868 .g_skip_top_lines = mt9v022_g_skip_top_lines,
869 };
870
871 static const struct v4l2_subdev_pad_ops mt9v022_subdev_pad_ops = {
872 .enum_mbus_code = mt9v022_enum_mbus_code,
873 .get_selection = mt9v022_get_selection,
874 .set_selection = mt9v022_set_selection,
875 .get_fmt = mt9v022_get_fmt,
876 .set_fmt = mt9v022_set_fmt,
877 };
878
879 static const struct v4l2_subdev_ops mt9v022_subdev_ops = {
880 .core = &mt9v022_subdev_core_ops,
881 .video = &mt9v022_subdev_video_ops,
882 .sensor = &mt9v022_subdev_sensor_ops,
883 .pad = &mt9v022_subdev_pad_ops,
884 };
885
mt9v022_probe(struct i2c_client * client,const struct i2c_device_id * did)886 static int mt9v022_probe(struct i2c_client *client,
887 const struct i2c_device_id *did)
888 {
889 struct mt9v022 *mt9v022;
890 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
891 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
892 struct mt9v022_platform_data *pdata;
893 int ret;
894
895 if (!ssdd) {
896 dev_err(&client->dev, "MT9V022 driver needs platform data\n");
897 return -EINVAL;
898 }
899
900 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) {
901 dev_warn(&adapter->dev,
902 "I2C-Adapter doesn't support I2C_FUNC_SMBUS_WORD\n");
903 return -EIO;
904 }
905
906 mt9v022 = devm_kzalloc(&client->dev, sizeof(struct mt9v022), GFP_KERNEL);
907 if (!mt9v022)
908 return -ENOMEM;
909
910 pdata = ssdd->drv_priv;
911 v4l2_i2c_subdev_init(&mt9v022->subdev, client, &mt9v022_subdev_ops);
912 v4l2_ctrl_handler_init(&mt9v022->hdl, 6);
913 v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
914 V4L2_CID_VFLIP, 0, 1, 1, 0);
915 v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
916 V4L2_CID_HFLIP, 0, 1, 1, 0);
917 mt9v022->autogain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
918 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
919 mt9v022->gain = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
920 V4L2_CID_GAIN, 0, 127, 1, 64);
921
922 /*
923 * Simulated autoexposure. If enabled, we calculate shutter width
924 * ourselves in the driver based on vertical blanking and frame width
925 */
926 mt9v022->autoexposure = v4l2_ctrl_new_std_menu(&mt9v022->hdl,
927 &mt9v022_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0,
928 V4L2_EXPOSURE_AUTO);
929 mt9v022->exposure = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
930 V4L2_CID_EXPOSURE, 1, 255, 1, 255);
931
932 mt9v022->hblank = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
933 V4L2_CID_HBLANK, MT9V022_HORIZONTAL_BLANKING_MIN,
934 MT9V022_HORIZONTAL_BLANKING_MAX, 1,
935 MT9V022_HORIZONTAL_BLANKING_DEF);
936
937 mt9v022->vblank = v4l2_ctrl_new_std(&mt9v022->hdl, &mt9v022_ctrl_ops,
938 V4L2_CID_VBLANK, MT9V022_VERTICAL_BLANKING_MIN,
939 MT9V022_VERTICAL_BLANKING_MAX, 1,
940 MT9V022_VERTICAL_BLANKING_DEF);
941
942 mt9v022->subdev.ctrl_handler = &mt9v022->hdl;
943 if (mt9v022->hdl.error) {
944 int err = mt9v022->hdl.error;
945
946 dev_err(&client->dev, "control initialisation err %d\n", err);
947 return err;
948 }
949 v4l2_ctrl_auto_cluster(2, &mt9v022->autoexposure,
950 V4L2_EXPOSURE_MANUAL, true);
951 v4l2_ctrl_auto_cluster(2, &mt9v022->autogain, 0, true);
952
953 mt9v022->chip_control = MT9V022_CHIP_CONTROL_DEFAULT;
954
955 /*
956 * On some platforms the first read out line is corrupted.
957 * Workaround it by skipping if indicated by platform data.
958 */
959 mt9v022->y_skip_top = pdata ? pdata->y_skip_top : 0;
960 mt9v022->rect.left = MT9V022_COLUMN_SKIP;
961 mt9v022->rect.top = MT9V022_ROW_SKIP;
962 mt9v022->rect.width = MT9V022_MAX_WIDTH;
963 mt9v022->rect.height = MT9V022_MAX_HEIGHT;
964
965 mt9v022->clk = v4l2_clk_get(&client->dev, "mclk");
966 if (IS_ERR(mt9v022->clk)) {
967 ret = PTR_ERR(mt9v022->clk);
968 goto eclkget;
969 }
970
971 ret = mt9v022_video_probe(client);
972 if (ret) {
973 v4l2_clk_put(mt9v022->clk);
974 eclkget:
975 v4l2_ctrl_handler_free(&mt9v022->hdl);
976 }
977
978 return ret;
979 }
980
mt9v022_remove(struct i2c_client * client)981 static int mt9v022_remove(struct i2c_client *client)
982 {
983 struct mt9v022 *mt9v022 = to_mt9v022(client);
984 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
985
986 v4l2_clk_put(mt9v022->clk);
987 v4l2_device_unregister_subdev(&mt9v022->subdev);
988 if (ssdd->free_bus)
989 ssdd->free_bus(ssdd);
990 v4l2_ctrl_handler_free(&mt9v022->hdl);
991
992 return 0;
993 }
994 static const struct i2c_device_id mt9v022_id[] = {
995 { "mt9v022", 0 },
996 { }
997 };
998 MODULE_DEVICE_TABLE(i2c, mt9v022_id);
999
1000 static struct i2c_driver mt9v022_i2c_driver = {
1001 .driver = {
1002 .name = "mt9v022",
1003 },
1004 .probe = mt9v022_probe,
1005 .remove = mt9v022_remove,
1006 .id_table = mt9v022_id,
1007 };
1008
1009 module_i2c_driver(mt9v022_i2c_driver);
1010
1011 MODULE_DESCRIPTION("Micron MT9V022 Camera driver");
1012 MODULE_AUTHOR("Guennadi Liakhovetski <kernel@pengutronix.de>");
1013 MODULE_LICENSE("GPL");
1014
