1 // SPDX-License-Identifier: GPL-2.0
2 // Copyright (c) 2017 Microchip Corporation.
3
4 #include <linux/clk.h>
5 #include <linux/delay.h>
6 #include <linux/gpio/consumer.h>
7 #include <linux/i2c.h>
8 #include <linux/module.h>
9 #include <linux/pm_runtime.h>
10 #include <linux/regmap.h>
11 #include <media/v4l2-ctrls.h>
12 #include <media/v4l2-event.h>
13 #include <media/v4l2-image-sizes.h>
14 #include <media/v4l2-subdev.h>
15
16 #define REG_OUTSIZE_LSB 0x34
17
18 /* OV7740 register tables */
19 #define REG_GAIN 0x00 /* Gain lower 8 bits (rest in vref) */
20 #define REG_BGAIN 0x01 /* blue gain */
21 #define REG_RGAIN 0x02 /* red gain */
22 #define REG_GGAIN 0x03 /* green gain */
23 #define REG_REG04 0x04 /* analog setting, dont change*/
24 #define REG_BAVG 0x05 /* b channel average */
25 #define REG_GAVG 0x06 /* g channel average */
26 #define REG_RAVG 0x07 /* r channel average */
27
28 #define REG_REG0C 0x0C /* filp enable */
29 #define REG0C_IMG_FLIP 0x80
30 #define REG0C_IMG_MIRROR 0x40
31
32 #define REG_REG0E 0x0E /* blc line */
33 #define REG_HAEC 0x0F /* auto exposure cntrl */
34 #define REG_AEC 0x10 /* auto exposure cntrl */
35
36 #define REG_CLK 0x11 /* Clock control */
37 #define REG_REG55 0x55 /* Clock PLL DIV/PreDiv */
38
39 #define REG_REG12 0x12
40
41 #define REG_REG13 0x13 /* auto/manual AGC, AEC, Write Balance*/
42 #define REG13_AEC_EN 0x01
43 #define REG13_AGC_EN 0x04
44
45 #define REG_REG14 0x14
46 #define REG_CTRL15 0x15
47 #define REG15_GAIN_MSB 0x03
48
49 #define REG_REG16 0x16
50
51 #define REG_MIDH 0x1C /* manufacture id byte */
52 #define REG_MIDL 0x1D /* manufacture id byre */
53 #define REG_PIDH 0x0A /* Product ID MSB */
54 #define REG_PIDL 0x0B /* Product ID LSB */
55
56 #define REG_84 0x84 /* lots of stuff */
57 #define REG_REG38 0x38 /* sub-addr */
58
59 #define REG_AHSTART 0x17 /* Horiz start high bits */
60 #define REG_AHSIZE 0x18
61 #define REG_AVSTART 0x19 /* Vert start high bits */
62 #define REG_AVSIZE 0x1A
63 #define REG_PSHFT 0x1b /* Pixel delay after HREF */
64
65 #define REG_HOUTSIZE 0x31
66 #define REG_VOUTSIZE 0x32
67 #define REG_HVSIZEOFF 0x33
68 #define REG_REG34 0x34 /* DSP output size H/V LSB*/
69
70 #define REG_ISP_CTRL00 0x80
71 #define ISPCTRL00_AWB_EN 0x10
72 #define ISPCTRL00_AWB_GAIN_EN 0x04
73
74 #define REG_YGAIN 0xE2 /* ygain for contrast control */
75
76 #define REG_YBRIGHT 0xE3
77 #define REG_SGNSET 0xE4
78 #define SGNSET_YBRIGHT_MASK 0x08
79
80 #define REG_USAT 0xDD
81 #define REG_VSAT 0xDE
82
83
84 struct ov7740 {
85 struct v4l2_subdev subdev;
86 #if defined(CONFIG_MEDIA_CONTROLLER)
87 struct media_pad pad;
88 #endif
89 struct v4l2_mbus_framefmt format;
90 const struct ov7740_pixfmt *fmt; /* Current format */
91 const struct ov7740_framesize *frmsize;
92 struct regmap *regmap;
93 struct clk *xvclk;
94 struct v4l2_ctrl_handler ctrl_handler;
95 struct {
96 /* gain cluster */
97 struct v4l2_ctrl *auto_gain;
98 struct v4l2_ctrl *gain;
99 };
100 struct {
101 struct v4l2_ctrl *auto_wb;
102 struct v4l2_ctrl *blue_balance;
103 struct v4l2_ctrl *red_balance;
104 };
105 struct {
106 struct v4l2_ctrl *hflip;
107 struct v4l2_ctrl *vflip;
108 };
109 struct {
110 /* exposure cluster */
111 struct v4l2_ctrl *auto_exposure;
112 struct v4l2_ctrl *exposure;
113 };
114 struct {
115 /* saturation/hue cluster */
116 struct v4l2_ctrl *saturation;
117 struct v4l2_ctrl *hue;
118 };
119 struct v4l2_ctrl *brightness;
120 struct v4l2_ctrl *contrast;
121
122 struct mutex mutex; /* To serialize asynchronus callbacks */
123 bool streaming; /* Streaming on/off */
124
125 struct gpio_desc *resetb_gpio;
126 struct gpio_desc *pwdn_gpio;
127 };
128
129 struct ov7740_pixfmt {
130 u32 mbus_code;
131 enum v4l2_colorspace colorspace;
132 const struct reg_sequence *regs;
133 u32 reg_num;
134 };
135
136 struct ov7740_framesize {
137 u16 width;
138 u16 height;
139 const struct reg_sequence *regs;
140 u32 reg_num;
141 };
142
143 static const struct reg_sequence ov7740_vga[] = {
144 {0x55, 0x40},
145 {0x11, 0x02},
146
147 {0xd5, 0x10},
148 {0x0c, 0x12},
149 {0x0d, 0x34},
150 {0x17, 0x25},
151 {0x18, 0xa0},
152 {0x19, 0x03},
153 {0x1a, 0xf0},
154 {0x1b, 0x89},
155 {0x22, 0x03},
156 {0x29, 0x18},
157 {0x2b, 0xf8},
158 {0x2c, 0x01},
159 {REG_HOUTSIZE, 0xa0},
160 {REG_VOUTSIZE, 0xf0},
161 {0x33, 0xc4},
162 {REG_OUTSIZE_LSB, 0x0},
163 {0x35, 0x05},
164 {0x04, 0x60},
165 {0x27, 0x80},
166 {0x3d, 0x0f},
167 {0x3e, 0x80},
168 {0x3f, 0x40},
169 {0x40, 0x7f},
170 {0x41, 0x6a},
171 {0x42, 0x29},
172 {0x44, 0x22},
173 {0x45, 0x41},
174 {0x47, 0x02},
175 {0x49, 0x64},
176 {0x4a, 0xa1},
177 {0x4b, 0x40},
178 {0x4c, 0x1a},
179 {0x4d, 0x50},
180 {0x4e, 0x13},
181 {0x64, 0x00},
182 {0x67, 0x88},
183 {0x68, 0x1a},
184
185 {0x14, 0x28},
186 {0x24, 0x3c},
187 {0x25, 0x30},
188 {0x26, 0x72},
189 {0x50, 0x97},
190 {0x51, 0x1f},
191 {0x52, 0x00},
192 {0x53, 0x00},
193 {0x20, 0x00},
194 {0x21, 0xcf},
195 {0x50, 0x4b},
196 {0x38, 0x14},
197 {0xe9, 0x00},
198 {0x56, 0x55},
199 {0x57, 0xff},
200 {0x58, 0xff},
201 {0x59, 0xff},
202 {0x5f, 0x04},
203 {0xec, 0x00},
204 {0x13, 0xff},
205
206 {0x81, 0x3f},
207 {0x82, 0x32},
208 {0x38, 0x11},
209 {0x84, 0x70},
210 {0x85, 0x00},
211 {0x86, 0x03},
212 {0x87, 0x01},
213 {0x88, 0x05},
214 {0x89, 0x30},
215 {0x8d, 0x30},
216 {0x8f, 0x85},
217 {0x93, 0x30},
218 {0x95, 0x85},
219 {0x99, 0x30},
220 {0x9b, 0x85},
221
222 {0x9c, 0x08},
223 {0x9d, 0x12},
224 {0x9e, 0x23},
225 {0x9f, 0x45},
226 {0xa0, 0x55},
227 {0xa1, 0x64},
228 {0xa2, 0x72},
229 {0xa3, 0x7f},
230 {0xa4, 0x8b},
231 {0xa5, 0x95},
232 {0xa6, 0xa7},
233 {0xa7, 0xb5},
234 {0xa8, 0xcb},
235 {0xa9, 0xdd},
236 {0xaa, 0xec},
237 {0xab, 0x1a},
238
239 {0xce, 0x78},
240 {0xcf, 0x6e},
241 {0xd0, 0x0a},
242 {0xd1, 0x0c},
243 {0xd2, 0x84},
244 {0xd3, 0x90},
245 {0xd4, 0x1e},
246
247 {0x5a, 0x24},
248 {0x5b, 0x1f},
249 {0x5c, 0x88},
250 {0x5d, 0x60},
251
252 {0xac, 0x6e},
253 {0xbe, 0xff},
254 {0xbf, 0x00},
255
256 {0x0f, 0x1d},
257 {0x0f, 0x1f},
258 };
259
260 static const struct ov7740_framesize ov7740_framesizes[] = {
261 {
262 .width = VGA_WIDTH,
263 .height = VGA_HEIGHT,
264 .regs = ov7740_vga,
265 .reg_num = ARRAY_SIZE(ov7740_vga),
266 },
267 };
268
269 #ifdef CONFIG_VIDEO_ADV_DEBUG
ov7740_get_register(struct v4l2_subdev * sd,struct v4l2_dbg_register * reg)270 static int ov7740_get_register(struct v4l2_subdev *sd,
271 struct v4l2_dbg_register *reg)
272 {
273 struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
274 struct regmap *regmap = ov7740->regmap;
275 unsigned int val = 0;
276 int ret;
277
278 ret = regmap_read(regmap, reg->reg & 0xff, &val);
279 reg->val = val;
280 reg->size = 1;
281
282 return ret;
283 }
284
ov7740_set_register(struct v4l2_subdev * sd,const struct v4l2_dbg_register * reg)285 static int ov7740_set_register(struct v4l2_subdev *sd,
286 const struct v4l2_dbg_register *reg)
287 {
288 struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
289 struct regmap *regmap = ov7740->regmap;
290
291 regmap_write(regmap, reg->reg & 0xff, reg->val & 0xff);
292
293 return 0;
294 }
295 #endif
296
ov7740_set_power(struct ov7740 * ov7740,int on)297 static int ov7740_set_power(struct ov7740 *ov7740, int on)
298 {
299 int ret;
300
301 if (on) {
302 ret = clk_prepare_enable(ov7740->xvclk);
303 if (ret)
304 return ret;
305
306 if (ov7740->pwdn_gpio)
307 gpiod_direction_output(ov7740->pwdn_gpio, 0);
308
309 if (ov7740->resetb_gpio) {
310 gpiod_set_value(ov7740->resetb_gpio, 1);
311 usleep_range(500, 1000);
312 gpiod_set_value(ov7740->resetb_gpio, 0);
313 usleep_range(3000, 5000);
314 }
315 } else {
316 clk_disable_unprepare(ov7740->xvclk);
317
318 if (ov7740->pwdn_gpio)
319 gpiod_direction_output(ov7740->pwdn_gpio, 0);
320 }
321
322 return 0;
323 }
324
325 static struct v4l2_subdev_core_ops ov7740_subdev_core_ops = {
326 .log_status = v4l2_ctrl_subdev_log_status,
327 #ifdef CONFIG_VIDEO_ADV_DEBUG
328 .g_register = ov7740_get_register,
329 .s_register = ov7740_set_register,
330 #endif
331 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
332 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
333 };
334
ov7740_set_white_balance(struct ov7740 * ov7740,int awb)335 static int ov7740_set_white_balance(struct ov7740 *ov7740, int awb)
336 {
337 struct regmap *regmap = ov7740->regmap;
338 unsigned int value;
339 int ret;
340
341 ret = regmap_read(regmap, REG_ISP_CTRL00, &value);
342 if (!ret) {
343 if (awb)
344 value |= (ISPCTRL00_AWB_EN | ISPCTRL00_AWB_GAIN_EN);
345 else
346 value &= ~(ISPCTRL00_AWB_EN | ISPCTRL00_AWB_GAIN_EN);
347 ret = regmap_write(regmap, REG_ISP_CTRL00, value);
348 if (ret)
349 return ret;
350 }
351
352 if (!awb) {
353 ret = regmap_write(regmap, REG_BGAIN,
354 ov7740->blue_balance->val);
355 if (ret)
356 return ret;
357
358 ret = regmap_write(regmap, REG_RGAIN, ov7740->red_balance->val);
359 if (ret)
360 return ret;
361 }
362
363 return 0;
364 }
365
ov7740_set_saturation(struct regmap * regmap,int value)366 static int ov7740_set_saturation(struct regmap *regmap, int value)
367 {
368 int ret;
369
370 ret = regmap_write(regmap, REG_USAT, (unsigned char)value);
371 if (ret)
372 return ret;
373
374 return regmap_write(regmap, REG_VSAT, (unsigned char)value);
375 }
376
ov7740_set_gain(struct regmap * regmap,int value)377 static int ov7740_set_gain(struct regmap *regmap, int value)
378 {
379 int ret;
380
381 ret = regmap_write(regmap, REG_GAIN, value & 0xff);
382 if (ret)
383 return ret;
384
385 ret = regmap_update_bits(regmap, REG_CTRL15,
386 REG15_GAIN_MSB, (value >> 8) & 0x3);
387 if (!ret)
388 ret = regmap_update_bits(regmap, REG_REG13, REG13_AGC_EN, 0);
389
390 return ret;
391 }
392
ov7740_set_autogain(struct regmap * regmap,int value)393 static int ov7740_set_autogain(struct regmap *regmap, int value)
394 {
395 unsigned int reg;
396 int ret;
397
398 ret = regmap_read(regmap, REG_REG13, ®);
399 if (ret)
400 return ret;
401 if (value)
402 reg |= REG13_AGC_EN;
403 else
404 reg &= ~REG13_AGC_EN;
405 return regmap_write(regmap, REG_REG13, reg);
406 }
407
ov7740_set_brightness(struct regmap * regmap,int value)408 static int ov7740_set_brightness(struct regmap *regmap, int value)
409 {
410 /* Turn off AEC/AGC */
411 regmap_update_bits(regmap, REG_REG13, REG13_AEC_EN, 0);
412 regmap_update_bits(regmap, REG_REG13, REG13_AGC_EN, 0);
413
414 if (value >= 0) {
415 regmap_write(regmap, REG_YBRIGHT, (unsigned char)value);
416 regmap_update_bits(regmap, REG_SGNSET, SGNSET_YBRIGHT_MASK, 0);
417 } else{
418 regmap_write(regmap, REG_YBRIGHT, (unsigned char)(-value));
419 regmap_update_bits(regmap, REG_SGNSET, SGNSET_YBRIGHT_MASK, 1);
420 }
421
422 return 0;
423 }
424
ov7740_set_contrast(struct regmap * regmap,int value)425 static int ov7740_set_contrast(struct regmap *regmap, int value)
426 {
427 return regmap_write(regmap, REG_YGAIN, (unsigned char)value);
428 }
429
ov7740_get_gain(struct ov7740 * ov7740,struct v4l2_ctrl * ctrl)430 static int ov7740_get_gain(struct ov7740 *ov7740, struct v4l2_ctrl *ctrl)
431 {
432 struct regmap *regmap = ov7740->regmap;
433 unsigned int value0, value1;
434 int ret;
435
436 if (!ctrl->val)
437 return 0;
438
439 ret = regmap_read(regmap, REG_GAIN, &value0);
440 if (ret)
441 return ret;
442 ret = regmap_read(regmap, REG_CTRL15, &value1);
443 if (ret)
444 return ret;
445
446 ov7740->gain->val = (value1 << 8) | (value0 & 0xff);
447
448 return 0;
449 }
450
ov7740_set_exp(struct regmap * regmap,int value)451 static int ov7740_set_exp(struct regmap *regmap, int value)
452 {
453 int ret;
454
455 /* Turn off AEC/AGC */
456 ret = regmap_update_bits(regmap, REG_REG13,
457 REG13_AEC_EN | REG13_AGC_EN, 0);
458 if (ret)
459 return ret;
460
461 ret = regmap_write(regmap, REG_AEC, (unsigned char)value);
462 if (ret)
463 return ret;
464
465 return regmap_write(regmap, REG_HAEC, (unsigned char)(value >> 8));
466 }
467
ov7740_set_autoexp(struct regmap * regmap,enum v4l2_exposure_auto_type value)468 static int ov7740_set_autoexp(struct regmap *regmap,
469 enum v4l2_exposure_auto_type value)
470 {
471 unsigned int reg;
472 int ret;
473
474 ret = regmap_read(regmap, REG_REG13, ®);
475 if (!ret) {
476 if (value == V4L2_EXPOSURE_AUTO)
477 reg |= (REG13_AEC_EN | REG13_AGC_EN);
478 else
479 reg &= ~(REG13_AEC_EN | REG13_AGC_EN);
480 ret = regmap_write(regmap, REG_REG13, reg);
481 }
482
483 return ret;
484 }
485
486
ov7740_get_volatile_ctrl(struct v4l2_ctrl * ctrl)487 static int ov7740_get_volatile_ctrl(struct v4l2_ctrl *ctrl)
488 {
489 struct ov7740 *ov7740 = container_of(ctrl->handler,
490 struct ov7740, ctrl_handler);
491 int ret;
492
493 switch (ctrl->id) {
494 case V4L2_CID_AUTOGAIN:
495 ret = ov7740_get_gain(ov7740, ctrl);
496 break;
497 default:
498 ret = -EINVAL;
499 break;
500 }
501 return ret;
502 }
503
ov7740_set_ctrl(struct v4l2_ctrl * ctrl)504 static int ov7740_set_ctrl(struct v4l2_ctrl *ctrl)
505 {
506 struct ov7740 *ov7740 = container_of(ctrl->handler,
507 struct ov7740, ctrl_handler);
508 struct i2c_client *client = v4l2_get_subdevdata(&ov7740->subdev);
509 struct regmap *regmap = ov7740->regmap;
510 int ret;
511 u8 val = 0;
512
513 if (pm_runtime_get_if_in_use(&client->dev) <= 0)
514 return 0;
515
516 switch (ctrl->id) {
517 case V4L2_CID_AUTO_WHITE_BALANCE:
518 ret = ov7740_set_white_balance(ov7740, ctrl->val);
519 break;
520 case V4L2_CID_SATURATION:
521 ret = ov7740_set_saturation(regmap, ctrl->val);
522 break;
523 case V4L2_CID_BRIGHTNESS:
524 ret = ov7740_set_brightness(regmap, ctrl->val);
525 break;
526 case V4L2_CID_CONTRAST:
527 ret = ov7740_set_contrast(regmap, ctrl->val);
528 break;
529 case V4L2_CID_VFLIP:
530 ret = regmap_update_bits(regmap, REG_REG0C,
531 REG0C_IMG_FLIP, val);
532 break;
533 case V4L2_CID_HFLIP:
534 val = ctrl->val ? REG0C_IMG_MIRROR : 0x00;
535 ret = regmap_update_bits(regmap, REG_REG0C,
536 REG0C_IMG_MIRROR, val);
537 break;
538 case V4L2_CID_AUTOGAIN:
539 if (!ctrl->val)
540 return ov7740_set_gain(regmap, ov7740->gain->val);
541
542 ret = ov7740_set_autogain(regmap, ctrl->val);
543 break;
544
545 case V4L2_CID_EXPOSURE_AUTO:
546 if (ctrl->val == V4L2_EXPOSURE_MANUAL)
547 return ov7740_set_exp(regmap, ov7740->exposure->val);
548
549 ret = ov7740_set_autoexp(regmap, ctrl->val);
550 break;
551 default:
552 ret = -EINVAL;
553 break;
554 }
555
556 pm_runtime_put(&client->dev);
557
558 return ret;
559 }
560
561 static const struct v4l2_ctrl_ops ov7740_ctrl_ops = {
562 .g_volatile_ctrl = ov7740_get_volatile_ctrl,
563 .s_ctrl = ov7740_set_ctrl,
564 };
565
ov7740_start_streaming(struct ov7740 * ov7740)566 static int ov7740_start_streaming(struct ov7740 *ov7740)
567 {
568 int ret;
569
570 if (ov7740->fmt) {
571 ret = regmap_multi_reg_write(ov7740->regmap,
572 ov7740->fmt->regs,
573 ov7740->fmt->reg_num);
574 if (ret)
575 return ret;
576 }
577
578 if (ov7740->frmsize) {
579 ret = regmap_multi_reg_write(ov7740->regmap,
580 ov7740->frmsize->regs,
581 ov7740->frmsize->reg_num);
582 if (ret)
583 return ret;
584 }
585
586 return __v4l2_ctrl_handler_setup(ov7740->subdev.ctrl_handler);
587 }
588
ov7740_set_stream(struct v4l2_subdev * sd,int enable)589 static int ov7740_set_stream(struct v4l2_subdev *sd, int enable)
590 {
591 struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
592 struct i2c_client *client = v4l2_get_subdevdata(sd);
593 int ret = 0;
594
595 mutex_lock(&ov7740->mutex);
596 if (ov7740->streaming == enable) {
597 mutex_unlock(&ov7740->mutex);
598 return 0;
599 }
600
601 if (enable) {
602 ret = pm_runtime_get_sync(&client->dev);
603 if (ret < 0) {
604 pm_runtime_put_noidle(&client->dev);
605 goto err_unlock;
606 }
607
608 ret = ov7740_start_streaming(ov7740);
609 if (ret)
610 goto err_rpm_put;
611 } else {
612 pm_runtime_put(&client->dev);
613 }
614
615 ov7740->streaming = enable;
616
617 mutex_unlock(&ov7740->mutex);
618 return ret;
619
620 err_rpm_put:
621 pm_runtime_put(&client->dev);
622 err_unlock:
623 mutex_unlock(&ov7740->mutex);
624 return ret;
625 }
626
ov7740_g_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * ival)627 static int ov7740_g_frame_interval(struct v4l2_subdev *sd,
628 struct v4l2_subdev_frame_interval *ival)
629 {
630 struct v4l2_fract *tpf = &ival->interval;
631
632
633 tpf->numerator = 1;
634 tpf->denominator = 60;
635
636 return 0;
637 }
638
ov7740_s_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_frame_interval * ival)639 static int ov7740_s_frame_interval(struct v4l2_subdev *sd,
640 struct v4l2_subdev_frame_interval *ival)
641 {
642 struct v4l2_fract *tpf = &ival->interval;
643
644
645 tpf->numerator = 1;
646 tpf->denominator = 60;
647
648 return 0;
649 }
650
651 static struct v4l2_subdev_video_ops ov7740_subdev_video_ops = {
652 .s_stream = ov7740_set_stream,
653 .s_frame_interval = ov7740_s_frame_interval,
654 .g_frame_interval = ov7740_g_frame_interval,
655 };
656
657 static const struct reg_sequence ov7740_format_yuyv[] = {
658 {0x12, 0x00},
659 {0x36, 0x3f},
660 {0x80, 0x7f},
661 {0x83, 0x01},
662 };
663
664 static const struct reg_sequence ov7740_format_bggr8[] = {
665 {0x36, 0x2f},
666 {0x80, 0x01},
667 {0x83, 0x04},
668 };
669
670 static const struct ov7740_pixfmt ov7740_formats[] = {
671 {
672 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
673 .colorspace = V4L2_COLORSPACE_SRGB,
674 .regs = ov7740_format_yuyv,
675 .reg_num = ARRAY_SIZE(ov7740_format_yuyv),
676 },
677 {
678 .mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8,
679 .colorspace = V4L2_COLORSPACE_SRGB,
680 .regs = ov7740_format_bggr8,
681 .reg_num = ARRAY_SIZE(ov7740_format_bggr8),
682 }
683 };
684 #define N_OV7740_FMTS ARRAY_SIZE(ov7740_formats)
685
ov7740_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_mbus_code_enum * code)686 static int ov7740_enum_mbus_code(struct v4l2_subdev *sd,
687 struct v4l2_subdev_pad_config *cfg,
688 struct v4l2_subdev_mbus_code_enum *code)
689 {
690 if (code->pad || code->index >= N_OV7740_FMTS)
691 return -EINVAL;
692
693 code->code = ov7740_formats[code->index].mbus_code;
694
695 return 0;
696 }
697
ov7740_enum_frame_interval(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_frame_interval_enum * fie)698 static int ov7740_enum_frame_interval(struct v4l2_subdev *sd,
699 struct v4l2_subdev_pad_config *cfg,
700 struct v4l2_subdev_frame_interval_enum *fie)
701 {
702 if (fie->pad)
703 return -EINVAL;
704
705 if (fie->index >= 1)
706 return -EINVAL;
707
708 if ((fie->width != VGA_WIDTH) || (fie->height != VGA_HEIGHT))
709 return -EINVAL;
710
711 fie->interval.numerator = 1;
712 fie->interval.denominator = 60;
713
714 return 0;
715 }
716
ov7740_enum_frame_size(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_frame_size_enum * fse)717 static int ov7740_enum_frame_size(struct v4l2_subdev *sd,
718 struct v4l2_subdev_pad_config *cfg,
719 struct v4l2_subdev_frame_size_enum *fse)
720 {
721 if (fse->pad)
722 return -EINVAL;
723
724 if (fse->index > 0)
725 return -EINVAL;
726
727 fse->min_width = fse->max_width = VGA_WIDTH;
728 fse->min_height = fse->max_height = VGA_HEIGHT;
729
730 return 0;
731 }
732
ov7740_try_fmt_internal(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * fmt,const struct ov7740_pixfmt ** ret_fmt,const struct ov7740_framesize ** ret_frmsize)733 static int ov7740_try_fmt_internal(struct v4l2_subdev *sd,
734 struct v4l2_mbus_framefmt *fmt,
735 const struct ov7740_pixfmt **ret_fmt,
736 const struct ov7740_framesize **ret_frmsize)
737 {
738 struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
739 const struct ov7740_framesize *fsize = &ov7740_framesizes[0];
740 int index, i;
741
742 for (index = 0; index < N_OV7740_FMTS; index++) {
743 if (ov7740_formats[index].mbus_code == fmt->code)
744 break;
745 }
746 if (index >= N_OV7740_FMTS) {
747 /* default to first format */
748 index = 0;
749 fmt->code = ov7740_formats[0].mbus_code;
750 }
751 if (ret_fmt != NULL)
752 *ret_fmt = ov7740_formats + index;
753
754 for (i = 0; i < ARRAY_SIZE(ov7740_framesizes); i++) {
755 if ((fsize->width >= fmt->width) &&
756 (fsize->height >= fmt->height)) {
757 fmt->width = fsize->width;
758 fmt->height = fsize->height;
759 break;
760 }
761
762 fsize++;
763 }
764
765 if (ret_frmsize != NULL)
766 *ret_frmsize = fsize;
767
768 fmt->field = V4L2_FIELD_NONE;
769 fmt->colorspace = ov7740_formats[index].colorspace;
770
771 ov7740->format = *fmt;
772
773 return 0;
774 }
775
ov7740_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)776 static int ov7740_set_fmt(struct v4l2_subdev *sd,
777 struct v4l2_subdev_pad_config *cfg,
778 struct v4l2_subdev_format *format)
779 {
780 struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
781 const struct ov7740_pixfmt *ovfmt;
782 const struct ov7740_framesize *fsize;
783 #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
784 struct v4l2_mbus_framefmt *mbus_fmt;
785 #endif
786 int ret;
787
788 mutex_lock(&ov7740->mutex);
789 if (format->pad) {
790 ret = -EINVAL;
791 goto error;
792 }
793
794 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
795 ret = ov7740_try_fmt_internal(sd, &format->format, NULL, NULL);
796 if (ret)
797 goto error;
798 #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
799 mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, format->pad);
800 *mbus_fmt = format->format;
801
802 mutex_unlock(&ov7740->mutex);
803 return 0;
804 #else
805 ret = -ENOTTY;
806 goto error;
807 #endif
808 }
809
810 ret = ov7740_try_fmt_internal(sd, &format->format, &ovfmt, &fsize);
811 if (ret)
812 goto error;
813
814 ov7740->fmt = ovfmt;
815 ov7740->frmsize = fsize;
816
817 mutex_unlock(&ov7740->mutex);
818 return 0;
819
820 error:
821 mutex_unlock(&ov7740->mutex);
822 return ret;
823 }
824
ov7740_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)825 static int ov7740_get_fmt(struct v4l2_subdev *sd,
826 struct v4l2_subdev_pad_config *cfg,
827 struct v4l2_subdev_format *format)
828 {
829 struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
830 #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
831 struct v4l2_mbus_framefmt *mbus_fmt;
832 #endif
833 int ret = 0;
834
835 mutex_lock(&ov7740->mutex);
836 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
837 #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
838 mbus_fmt = v4l2_subdev_get_try_format(sd, cfg, 0);
839 format->format = *mbus_fmt;
840 ret = 0;
841 #else
842 ret = -ENOTTY;
843 #endif
844 } else {
845 format->format = ov7740->format;
846 }
847 mutex_unlock(&ov7740->mutex);
848
849 return ret;
850 }
851
852 static const struct v4l2_subdev_pad_ops ov7740_subdev_pad_ops = {
853 .enum_frame_interval = ov7740_enum_frame_interval,
854 .enum_frame_size = ov7740_enum_frame_size,
855 .enum_mbus_code = ov7740_enum_mbus_code,
856 .get_fmt = ov7740_get_fmt,
857 .set_fmt = ov7740_set_fmt,
858 };
859
860 static const struct v4l2_subdev_ops ov7740_subdev_ops = {
861 .core = &ov7740_subdev_core_ops,
862 .video = &ov7740_subdev_video_ops,
863 .pad = &ov7740_subdev_pad_ops,
864 };
865
ov7740_get_default_format(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * format)866 static void ov7740_get_default_format(struct v4l2_subdev *sd,
867 struct v4l2_mbus_framefmt *format)
868 {
869 struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
870
871 format->width = ov7740->frmsize->width;
872 format->height = ov7740->frmsize->height;
873 format->colorspace = ov7740->fmt->colorspace;
874 format->code = ov7740->fmt->mbus_code;
875 format->field = V4L2_FIELD_NONE;
876 }
877
878 #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
ov7740_open(struct v4l2_subdev * sd,struct v4l2_subdev_fh * fh)879 static int ov7740_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
880 {
881 struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
882 struct v4l2_mbus_framefmt *format =
883 v4l2_subdev_get_try_format(sd, fh->pad, 0);
884
885 mutex_lock(&ov7740->mutex);
886 ov7740_get_default_format(sd, format);
887 mutex_unlock(&ov7740->mutex);
888
889 return 0;
890 }
891
892 static const struct v4l2_subdev_internal_ops ov7740_subdev_internal_ops = {
893 .open = ov7740_open,
894 };
895 #endif
896
ov7740_probe_dt(struct i2c_client * client,struct ov7740 * ov7740)897 static int ov7740_probe_dt(struct i2c_client *client,
898 struct ov7740 *ov7740)
899 {
900 ov7740->resetb_gpio = devm_gpiod_get_optional(&client->dev, "reset",
901 GPIOD_OUT_HIGH);
902 if (IS_ERR(ov7740->resetb_gpio)) {
903 dev_info(&client->dev, "can't get %s GPIO\n", "reset");
904 return PTR_ERR(ov7740->resetb_gpio);
905 }
906
907 ov7740->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "powerdown",
908 GPIOD_OUT_LOW);
909 if (IS_ERR(ov7740->pwdn_gpio)) {
910 dev_info(&client->dev, "can't get %s GPIO\n", "powerdown");
911 return PTR_ERR(ov7740->pwdn_gpio);
912 }
913
914 return 0;
915 }
916
ov7740_detect(struct ov7740 * ov7740)917 static int ov7740_detect(struct ov7740 *ov7740)
918 {
919 struct regmap *regmap = ov7740->regmap;
920 unsigned int midh, midl, pidh, pidl;
921 int ret;
922
923 ret = regmap_read(regmap, REG_MIDH, &midh);
924 if (ret)
925 return ret;
926 if (midh != 0x7f)
927 return -ENODEV;
928
929 ret = regmap_read(regmap, REG_MIDL, &midl);
930 if (ret)
931 return ret;
932 if (midl != 0xa2)
933 return -ENODEV;
934
935 ret = regmap_read(regmap, REG_PIDH, &pidh);
936 if (ret)
937 return ret;
938 if (pidh != 0x77)
939 return -ENODEV;
940
941 ret = regmap_read(regmap, REG_PIDL, &pidl);
942 if (ret)
943 return ret;
944 if ((pidl != 0x40) && (pidl != 0x41) && (pidl != 0x42))
945 return -ENODEV;
946
947 return 0;
948 }
949
ov7740_init_controls(struct ov7740 * ov7740)950 static int ov7740_init_controls(struct ov7740 *ov7740)
951 {
952 struct i2c_client *client = v4l2_get_subdevdata(&ov7740->subdev);
953 struct v4l2_ctrl_handler *ctrl_hdlr = &ov7740->ctrl_handler;
954 int ret;
955
956 ret = v4l2_ctrl_handler_init(ctrl_hdlr, 12);
957 if (ret < 0)
958 return ret;
959
960 ctrl_hdlr->lock = &ov7740->mutex;
961 ov7740->auto_wb = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
962 V4L2_CID_AUTO_WHITE_BALANCE,
963 0, 1, 1, 1);
964 ov7740->blue_balance = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
965 V4L2_CID_BLUE_BALANCE,
966 0, 0xff, 1, 0x80);
967 ov7740->red_balance = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
968 V4L2_CID_RED_BALANCE,
969 0, 0xff, 1, 0x80);
970
971 ov7740->brightness = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
972 V4L2_CID_BRIGHTNESS,
973 -255, 255, 1, 0);
974 ov7740->contrast = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
975 V4L2_CID_CONTRAST,
976 0, 127, 1, 0x20);
977 ov7740->saturation = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
978 V4L2_CID_SATURATION, 0, 256, 1, 0x80);
979 ov7740->hflip = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
980 V4L2_CID_HFLIP, 0, 1, 1, 0);
981 ov7740->vflip = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
982 V4L2_CID_VFLIP, 0, 1, 1, 0);
983
984 ov7740->gain = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
985 V4L2_CID_GAIN, 0, 1023, 1, 500);
986 if (ov7740->gain)
987 ov7740->gain->flags |= V4L2_CTRL_FLAG_VOLATILE;
988
989 ov7740->auto_gain = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
990 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
991
992 ov7740->exposure = v4l2_ctrl_new_std(ctrl_hdlr, &ov7740_ctrl_ops,
993 V4L2_CID_EXPOSURE, 0, 65535, 1, 500);
994 if (ov7740->exposure)
995 ov7740->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE;
996
997 ov7740->auto_exposure = v4l2_ctrl_new_std_menu(ctrl_hdlr,
998 &ov7740_ctrl_ops,
999 V4L2_CID_EXPOSURE_AUTO,
1000 V4L2_EXPOSURE_MANUAL, 0,
1001 V4L2_EXPOSURE_AUTO);
1002
1003 v4l2_ctrl_auto_cluster(3, &ov7740->auto_wb, 0, false);
1004 v4l2_ctrl_auto_cluster(2, &ov7740->auto_gain, 0, true);
1005 v4l2_ctrl_auto_cluster(2, &ov7740->auto_exposure,
1006 V4L2_EXPOSURE_MANUAL, false);
1007 v4l2_ctrl_cluster(2, &ov7740->hflip);
1008
1009 if (ctrl_hdlr->error) {
1010 ret = ctrl_hdlr->error;
1011 dev_err(&client->dev, "controls initialisation failed (%d)\n",
1012 ret);
1013 goto error;
1014 }
1015
1016 ret = v4l2_ctrl_handler_setup(ctrl_hdlr);
1017 if (ret) {
1018 dev_err(&client->dev, "%s control init failed (%d)\n",
1019 __func__, ret);
1020 goto error;
1021 }
1022
1023 ov7740->subdev.ctrl_handler = ctrl_hdlr;
1024 return 0;
1025
1026 error:
1027 v4l2_ctrl_handler_free(ctrl_hdlr);
1028 mutex_destroy(&ov7740->mutex);
1029 return ret;
1030 }
1031
ov7740_free_controls(struct ov7740 * ov7740)1032 static void ov7740_free_controls(struct ov7740 *ov7740)
1033 {
1034 v4l2_ctrl_handler_free(ov7740->subdev.ctrl_handler);
1035 mutex_destroy(&ov7740->mutex);
1036 }
1037
1038 #define OV7740_MAX_REGISTER 0xff
1039 static const struct regmap_config ov7740_regmap_config = {
1040 .reg_bits = 8,
1041 .val_bits = 8,
1042 .max_register = OV7740_MAX_REGISTER,
1043 };
1044
ov7740_probe(struct i2c_client * client,const struct i2c_device_id * id)1045 static int ov7740_probe(struct i2c_client *client,
1046 const struct i2c_device_id *id)
1047 {
1048 struct ov7740 *ov7740;
1049 struct v4l2_subdev *sd;
1050 int ret;
1051
1052 if (!i2c_check_functionality(client->adapter,
1053 I2C_FUNC_SMBUS_BYTE_DATA)) {
1054 dev_err(&client->dev,
1055 "OV7740: I2C-Adapter doesn't support SMBUS\n");
1056 return -EIO;
1057 }
1058
1059 ov7740 = devm_kzalloc(&client->dev, sizeof(*ov7740), GFP_KERNEL);
1060 if (!ov7740)
1061 return -ENOMEM;
1062
1063 ov7740->xvclk = devm_clk_get(&client->dev, "xvclk");
1064 if (IS_ERR(ov7740->xvclk)) {
1065 ret = PTR_ERR(ov7740->xvclk);
1066 dev_err(&client->dev,
1067 "OV7740: fail to get xvclk: %d\n", ret);
1068 return ret;
1069 }
1070
1071 ret = ov7740_probe_dt(client, ov7740);
1072 if (ret)
1073 return ret;
1074
1075 ov7740->regmap = devm_regmap_init_i2c(client, &ov7740_regmap_config);
1076 if (IS_ERR(ov7740->regmap)) {
1077 ret = PTR_ERR(ov7740->regmap);
1078 dev_err(&client->dev, "Failed to allocate register map: %d\n",
1079 ret);
1080 return ret;
1081 }
1082
1083 sd = &ov7740->subdev;
1084 client->flags |= I2C_CLIENT_SCCB;
1085 v4l2_i2c_subdev_init(sd, client, &ov7740_subdev_ops);
1086
1087 #ifdef CONFIG_VIDEO_V4L2_SUBDEV_API
1088 sd->internal_ops = &ov7740_subdev_internal_ops;
1089 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE | V4L2_SUBDEV_FL_HAS_EVENTS;
1090 #endif
1091
1092 #if defined(CONFIG_MEDIA_CONTROLLER)
1093 ov7740->pad.flags = MEDIA_PAD_FL_SOURCE;
1094 sd->entity.function = MEDIA_ENT_F_CAM_SENSOR;
1095 ret = media_entity_pads_init(&sd->entity, 1, &ov7740->pad);
1096 if (ret)
1097 return ret;
1098 #endif
1099
1100 ret = ov7740_set_power(ov7740, 1);
1101 if (ret)
1102 return ret;
1103
1104 ret = ov7740_detect(ov7740);
1105 if (ret)
1106 goto error_detect;
1107
1108 mutex_init(&ov7740->mutex);
1109
1110 ret = ov7740_init_controls(ov7740);
1111 if (ret)
1112 goto error_init_controls;
1113
1114 v4l_info(client, "chip found @ 0x%02x (%s)\n",
1115 client->addr << 1, client->adapter->name);
1116
1117 ov7740->fmt = &ov7740_formats[0];
1118 ov7740->frmsize = &ov7740_framesizes[0];
1119
1120 ov7740_get_default_format(sd, &ov7740->format);
1121
1122 ret = v4l2_async_register_subdev(sd);
1123 if (ret)
1124 goto error_async_register;
1125
1126 pm_runtime_set_active(&client->dev);
1127 pm_runtime_enable(&client->dev);
1128 pm_runtime_idle(&client->dev);
1129
1130 return 0;
1131
1132 error_async_register:
1133 v4l2_ctrl_handler_free(ov7740->subdev.ctrl_handler);
1134 error_init_controls:
1135 ov7740_free_controls(ov7740);
1136 error_detect:
1137 ov7740_set_power(ov7740, 0);
1138 media_entity_cleanup(&ov7740->subdev.entity);
1139
1140 return ret;
1141 }
1142
ov7740_remove(struct i2c_client * client)1143 static int ov7740_remove(struct i2c_client *client)
1144 {
1145 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1146 struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
1147
1148 mutex_destroy(&ov7740->mutex);
1149 v4l2_ctrl_handler_free(ov7740->subdev.ctrl_handler);
1150 media_entity_cleanup(&ov7740->subdev.entity);
1151 v4l2_async_unregister_subdev(sd);
1152 ov7740_free_controls(ov7740);
1153
1154 pm_runtime_get_sync(&client->dev);
1155 pm_runtime_disable(&client->dev);
1156 pm_runtime_set_suspended(&client->dev);
1157 pm_runtime_put_noidle(&client->dev);
1158
1159 ov7740_set_power(ov7740, 0);
1160 return 0;
1161 }
1162
ov7740_runtime_suspend(struct device * dev)1163 static int __maybe_unused ov7740_runtime_suspend(struct device *dev)
1164 {
1165 struct i2c_client *client = to_i2c_client(dev);
1166 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1167 struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
1168
1169 ov7740_set_power(ov7740, 0);
1170
1171 return 0;
1172 }
1173
ov7740_runtime_resume(struct device * dev)1174 static int __maybe_unused ov7740_runtime_resume(struct device *dev)
1175 {
1176 struct i2c_client *client = to_i2c_client(dev);
1177 struct v4l2_subdev *sd = i2c_get_clientdata(client);
1178 struct ov7740 *ov7740 = container_of(sd, struct ov7740, subdev);
1179
1180 return ov7740_set_power(ov7740, 1);
1181 }
1182
1183 static const struct i2c_device_id ov7740_id[] = {
1184 { "ov7740", 0 },
1185 { /* sentinel */ }
1186 };
1187 MODULE_DEVICE_TABLE(i2c, ov7740_id);
1188
1189 static const struct dev_pm_ops ov7740_pm_ops = {
1190 SET_RUNTIME_PM_OPS(ov7740_runtime_suspend, ov7740_runtime_resume, NULL)
1191 };
1192
1193 static const struct of_device_id ov7740_of_match[] = {
1194 {.compatible = "ovti,ov7740", },
1195 { /* sentinel */ },
1196 };
1197 MODULE_DEVICE_TABLE(of, ov7740_of_match);
1198
1199 static struct i2c_driver ov7740_i2c_driver = {
1200 .driver = {
1201 .name = "ov7740",
1202 .pm = &ov7740_pm_ops,
1203 .of_match_table = of_match_ptr(ov7740_of_match),
1204 },
1205 .probe = ov7740_probe,
1206 .remove = ov7740_remove,
1207 .id_table = ov7740_id,
1208 };
1209 module_i2c_driver(ov7740_i2c_driver);
1210
1211 MODULE_DESCRIPTION("The V4L2 driver for Omnivision 7740 sensor");
1212 MODULE_AUTHOR("Songjun Wu <songjun.wu@atmel.com>");
1213 MODULE_LICENSE("GPL v2");
1214
