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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / media / i2c / ov6650.c
blob91906b94f9783f9e66d39f0f4e82d8fce8baf291
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * V4L2 subdevice driver for OmniVision OV6650 Camera Sensor
4 *
5 * Copyright (C) 2010 Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
6 *
7 * Based on OmniVision OV96xx Camera Driver
8 * Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com>
9 *
10 * Based on ov772x camera driver:
11 * Copyright (C) 2008 Renesas Solutions Corp.
12 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
13 *
14 * Based on ov7670 and soc_camera_platform driver,
15 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
16 * Copyright (C) 2008 Magnus Damm
17 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
18 *
19 * Hardware specific bits initially based on former work by Matt Callow
20 * drivers/media/video/omap/sensor_ov6650.c
21 * Copyright (C) 2006 Matt Callow
22 */
23
24 #include <linux/bitops.h>
25 #include <linux/delay.h>
26 #include <linux/i2c.h>
27 #include <linux/slab.h>
28 #include <linux/v4l2-mediabus.h>
29 #include <linux/module.h>
30
31 #include <media/v4l2-clk.h>
32 #include <media/v4l2-ctrls.h>
33 #include <media/v4l2-device.h>
34
35 /* Register definitions */
36 #define REG_GAIN 0x00 /* range 00 - 3F */
37 #define REG_BLUE 0x01
38 #define REG_RED 0x02
39 #define REG_SAT 0x03 /* [7:4] saturation [0:3] reserved */
40 #define REG_HUE 0x04 /* [7:6] rsrvd [5] hue en [4:0] hue */
41
42 #define REG_BRT 0x06
43
44 #define REG_PIDH 0x0a
45 #define REG_PIDL 0x0b
46
47 #define REG_AECH 0x10
48 #define REG_CLKRC 0x11 /* Data Format and Internal Clock */
49 /* [7:6] Input system clock (MHz)*/
50 /* 00=8, 01=12, 10=16, 11=24 */
51 /* [5:0]: Internal Clock Pre-Scaler */
52 #define REG_COMA 0x12 /* [7] Reset */
53 #define REG_COMB 0x13
54 #define REG_COMC 0x14
55 #define REG_COMD 0x15
56 #define REG_COML 0x16
57 #define REG_HSTRT 0x17
58 #define REG_HSTOP 0x18
59 #define REG_VSTRT 0x19
60 #define REG_VSTOP 0x1a
61 #define REG_PSHFT 0x1b
62 #define REG_MIDH 0x1c
63 #define REG_MIDL 0x1d
64 #define REG_HSYNS 0x1e
65 #define REG_HSYNE 0x1f
66 #define REG_COME 0x20
67 #define REG_YOFF 0x21
68 #define REG_UOFF 0x22
69 #define REG_VOFF 0x23
70 #define REG_AEW 0x24
71 #define REG_AEB 0x25
72 #define REG_COMF 0x26
73 #define REG_COMG 0x27
74 #define REG_COMH 0x28
75 #define REG_COMI 0x29
76
77 #define REG_FRARL 0x2b
78 #define REG_COMJ 0x2c
79 #define REG_COMK 0x2d
80 #define REG_AVGY 0x2e
81 #define REG_REF0 0x2f
82 #define REG_REF1 0x30
83 #define REG_REF2 0x31
84 #define REG_FRAJH 0x32
85 #define REG_FRAJL 0x33
86 #define REG_FACT 0x34
87 #define REG_L1AEC 0x35
88 #define REG_AVGU 0x36
89 #define REG_AVGV 0x37
90
91 #define REG_SPCB 0x60
92 #define REG_SPCC 0x61
93 #define REG_GAM1 0x62
94 #define REG_GAM2 0x63
95 #define REG_GAM3 0x64
96 #define REG_SPCD 0x65
97
98 #define REG_SPCE 0x68
99 #define REG_ADCL 0x69
100
101 #define REG_RMCO 0x6c
102 #define REG_GMCO 0x6d
103 #define REG_BMCO 0x6e
104
105
106 /* Register bits, values, etc. */
107 #define OV6650_PIDH 0x66 /* high byte of product ID number */
108 #define OV6650_PIDL 0x50 /* low byte of product ID number */
109 #define OV6650_MIDH 0x7F /* high byte of mfg ID */
110 #define OV6650_MIDL 0xA2 /* low byte of mfg ID */
111
112 #define DEF_GAIN 0x00
113 #define DEF_BLUE 0x80
114 #define DEF_RED 0x80
115
116 #define SAT_SHIFT 4
117 #define SAT_MASK (0xf << SAT_SHIFT)
118 #define SET_SAT(x) (((x) << SAT_SHIFT) & SAT_MASK)
119
120 #define HUE_EN BIT(5)
121 #define HUE_MASK 0x1f
122 #define DEF_HUE 0x10
123 #define SET_HUE(x) (HUE_EN | ((x) & HUE_MASK))
124
125 #define DEF_AECH 0x4D
126
127 #define CLKRC_8MHz 0x00
128 #define CLKRC_12MHz 0x40
129 #define CLKRC_16MHz 0x80
130 #define CLKRC_24MHz 0xc0
131 #define CLKRC_DIV_MASK 0x3f
132 #define GET_CLKRC_DIV(x) (((x) & CLKRC_DIV_MASK) + 1)
133 #define DEF_CLKRC 0x00
134
135 #define COMA_RESET BIT(7)
136 #define COMA_QCIF BIT(5)
137 #define COMA_RAW_RGB BIT(4)
138 #define COMA_RGB BIT(3)
139 #define COMA_BW BIT(2)
140 #define COMA_WORD_SWAP BIT(1)
141 #define COMA_BYTE_SWAP BIT(0)
142 #define DEF_COMA 0x00
143
144 #define COMB_FLIP_V BIT(7)
145 #define COMB_FLIP_H BIT(5)
146 #define COMB_BAND_FILTER BIT(4)
147 #define COMB_AWB BIT(2)
148 #define COMB_AGC BIT(1)
149 #define COMB_AEC BIT(0)
150 #define DEF_COMB 0x5f
151
152 #define COML_ONE_CHANNEL BIT(7)
153
154 #define DEF_HSTRT 0x24
155 #define DEF_HSTOP 0xd4
156 #define DEF_VSTRT 0x04
157 #define DEF_VSTOP 0x94
158
159 #define COMF_HREF_LOW BIT(4)
160
161 #define COMJ_PCLK_RISING BIT(4)
162 #define COMJ_VSYNC_HIGH BIT(0)
163
164 /* supported resolutions */
165 #define W_QCIF (DEF_HSTOP - DEF_HSTRT)
166 #define W_CIF (W_QCIF << 1)
167 #define H_QCIF (DEF_VSTOP - DEF_VSTRT)
168 #define H_CIF (H_QCIF << 1)
169
170 #define FRAME_RATE_MAX 30
171
172
173 struct ov6650_reg {
174 u8 reg;
175 u8 val;
176 };
177
178 struct ov6650 {
179 struct v4l2_subdev subdev;
180 struct v4l2_ctrl_handler hdl;
181 struct {
182 /* exposure/autoexposure cluster */
183 struct v4l2_ctrl *autoexposure;
184 struct v4l2_ctrl *exposure;
185 };
186 struct {
187 /* gain/autogain cluster */
188 struct v4l2_ctrl *autogain;
189 struct v4l2_ctrl *gain;
190 };
191 struct {
192 /* blue/red/autowhitebalance cluster */
193 struct v4l2_ctrl *autowb;
194 struct v4l2_ctrl *blue;
195 struct v4l2_ctrl *red;
196 };
197 struct v4l2_clk *clk;
198 bool half_scale; /* scale down output by 2 */
199 struct v4l2_rect rect; /* sensor cropping window */
200 struct v4l2_fract tpf; /* as requested with s_frame_interval */
201 u32 code;
202 };
203
204 struct ov6650_xclk {
205 unsigned long rate;
206 u8 clkrc;
207 };
208
209 static const struct ov6650_xclk ov6650_xclk[] = {
210 {
211 .rate = 8000000,
212 .clkrc = CLKRC_8MHz,
213 },
214 {
215 .rate = 12000000,
216 .clkrc = CLKRC_12MHz,
217 },
218 {
219 .rate = 16000000,
220 .clkrc = CLKRC_16MHz,
221 },
222 {
223 .rate = 24000000,
224 .clkrc = CLKRC_24MHz,
225 },
226 };
227
228 static u32 ov6650_codes[] = {
229 MEDIA_BUS_FMT_YUYV8_2X8,
230 MEDIA_BUS_FMT_UYVY8_2X8,
231 MEDIA_BUS_FMT_YVYU8_2X8,
232 MEDIA_BUS_FMT_VYUY8_2X8,
233 MEDIA_BUS_FMT_SBGGR8_1X8,
234 MEDIA_BUS_FMT_Y8_1X8,
235 };
236
237 static const struct v4l2_mbus_framefmt ov6650_def_fmt = {
238 .width = W_CIF,
239 .height = H_CIF,
240 .code = MEDIA_BUS_FMT_SBGGR8_1X8,
241 .colorspace = V4L2_COLORSPACE_SRGB,
242 .field = V4L2_FIELD_NONE,
243 .ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT,
244 .quantization = V4L2_QUANTIZATION_DEFAULT,
245 .xfer_func = V4L2_XFER_FUNC_DEFAULT,
246 };
247
248 /* read a register */
249 static int ov6650_reg_read(struct i2c_client *client, u8 reg, u8 *val)
250 {
251 int ret;
252 u8 data = reg;
253 struct i2c_msg msg = {
254 .addr = client->addr,
255 .flags = 0,
256 .len = 1,
257 .buf = &data,
258 };
259
260 ret = i2c_transfer(client->adapter, &msg, 1);
261 if (ret < 0)
262 goto err;
263
264 msg.flags = I2C_M_RD;
265 ret = i2c_transfer(client->adapter, &msg, 1);
266 if (ret < 0)
267 goto err;
268
269 *val = data;
270 return 0;
271
272 err:
273 dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg);
274 return ret;
275 }
276
277 /* write a register */
278 static int ov6650_reg_write(struct i2c_client *client, u8 reg, u8 val)
279 {
280 int ret;
281 unsigned char data[2] = { reg, val };
282 struct i2c_msg msg = {
283 .addr = client->addr,
284 .flags = 0,
285 .len = 2,
286 .buf = data,
287 };
288
289 ret = i2c_transfer(client->adapter, &msg, 1);
290 udelay(100);
291
292 if (ret < 0) {
293 dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg);
294 return ret;
295 }
296 return 0;
297 }
298
299
300 /* Read a register, alter its bits, write it back */
301 static int ov6650_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 mask)
302 {
303 u8 val;
304 int ret;
305
306 ret = ov6650_reg_read(client, reg, &val);
307 if (ret) {
308 dev_err(&client->dev,
309 "[Read]-Modify-Write of register 0x%02x failed!\n",
310 reg);
311 return ret;
312 }
313
314 val &= ~mask;
315 val |= set;
316
317 ret = ov6650_reg_write(client, reg, val);
318 if (ret)
319 dev_err(&client->dev,
320 "Read-Modify-[Write] of register 0x%02x failed!\n",
321 reg);
322
323 return ret;
324 }
325
326 static struct ov6650 *to_ov6650(const struct i2c_client *client)
327 {
328 return container_of(i2c_get_clientdata(client), struct ov6650, subdev);
329 }
330
331 /* Start/Stop streaming from the device */
332 static int ov6650_s_stream(struct v4l2_subdev *sd, int enable)
333 {
334 return 0;
335 }
336
337 /* Get status of additional camera capabilities */
338 static int ov6550_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
339 {
340 struct ov6650 *priv = container_of(ctrl->handler, struct ov6650, hdl);
341 struct v4l2_subdev *sd = &priv->subdev;
342 struct i2c_client *client = v4l2_get_subdevdata(sd);
343 uint8_t reg, reg2;
344 int ret;
345
346 switch (ctrl->id) {
347 case V4L2_CID_AUTOGAIN:
348 ret = ov6650_reg_read(client, REG_GAIN, &reg);
349 if (!ret)
350 priv->gain->val = reg;
351 return ret;
352 case V4L2_CID_AUTO_WHITE_BALANCE:
353 ret = ov6650_reg_read(client, REG_BLUE, &reg);
354 if (!ret)
355 ret = ov6650_reg_read(client, REG_RED, &reg2);
356 if (!ret) {
357 priv->blue->val = reg;
358 priv->red->val = reg2;
359 }
360 return ret;
361 case V4L2_CID_EXPOSURE_AUTO:
362 ret = ov6650_reg_read(client, REG_AECH, &reg);
363 if (!ret)
364 priv->exposure->val = reg;
365 return ret;
366 }
367 return -EINVAL;
368 }
369
370 /* Set status of additional camera capabilities */
371 static int ov6550_s_ctrl(struct v4l2_ctrl *ctrl)
372 {
373 struct ov6650 *priv = container_of(ctrl->handler, struct ov6650, hdl);
374 struct v4l2_subdev *sd = &priv->subdev;
375 struct i2c_client *client = v4l2_get_subdevdata(sd);
376 int ret;
377
378 switch (ctrl->id) {
379 case V4L2_CID_AUTOGAIN:
380 ret = ov6650_reg_rmw(client, REG_COMB,
381 ctrl->val ? COMB_AGC : 0, COMB_AGC);
382 if (!ret && !ctrl->val)
383 ret = ov6650_reg_write(client, REG_GAIN, priv->gain->val);
384 return ret;
385 case V4L2_CID_AUTO_WHITE_BALANCE:
386 ret = ov6650_reg_rmw(client, REG_COMB,
387 ctrl->val ? COMB_AWB : 0, COMB_AWB);
388 if (!ret && !ctrl->val) {
389 ret = ov6650_reg_write(client, REG_BLUE, priv->blue->val);
390 if (!ret)
391 ret = ov6650_reg_write(client, REG_RED,
392 priv->red->val);
393 }
394 return ret;
395 case V4L2_CID_SATURATION:
396 return ov6650_reg_rmw(client, REG_SAT, SET_SAT(ctrl->val),
397 SAT_MASK);
398 case V4L2_CID_HUE:
399 return ov6650_reg_rmw(client, REG_HUE, SET_HUE(ctrl->val),
400 HUE_MASK);
401 case V4L2_CID_BRIGHTNESS:
402 return ov6650_reg_write(client, REG_BRT, ctrl->val);
403 case V4L2_CID_EXPOSURE_AUTO:
404 ret = ov6650_reg_rmw(client, REG_COMB, ctrl->val ==
405 V4L2_EXPOSURE_AUTO ? COMB_AEC : 0, COMB_AEC);
406 if (!ret && ctrl->val == V4L2_EXPOSURE_MANUAL)
407 ret = ov6650_reg_write(client, REG_AECH,
408 priv->exposure->val);
409 return ret;
410 case V4L2_CID_GAMMA:
411 return ov6650_reg_write(client, REG_GAM1, ctrl->val);
412 case V4L2_CID_VFLIP:
413 return ov6650_reg_rmw(client, REG_COMB,
414 ctrl->val ? COMB_FLIP_V : 0, COMB_FLIP_V);
415 case V4L2_CID_HFLIP:
416 return ov6650_reg_rmw(client, REG_COMB,
417 ctrl->val ? COMB_FLIP_H : 0, COMB_FLIP_H);
418 }
419
420 return -EINVAL;
421 }
422
423 #ifdef CONFIG_VIDEO_ADV_DEBUG
424 static int ov6650_get_register(struct v4l2_subdev *sd,
425 struct v4l2_dbg_register *reg)
426 {
427 struct i2c_client *client = v4l2_get_subdevdata(sd);
428 int ret;
429 u8 val;
430
431 if (reg->reg & ~0xff)
432 return -EINVAL;
433
434 reg->size = 1;
435
436 ret = ov6650_reg_read(client, reg->reg, &val);
437 if (!ret)
438 reg->val = (__u64)val;
439
440 return ret;
441 }
442
443 static int ov6650_set_register(struct v4l2_subdev *sd,
444 const struct v4l2_dbg_register *reg)
445 {
446 struct i2c_client *client = v4l2_get_subdevdata(sd);
447
448 if (reg->reg & ~0xff || reg->val & ~0xff)
449 return -EINVAL;
450
451 return ov6650_reg_write(client, reg->reg, reg->val);
452 }
453 #endif
454
455 static int ov6650_s_power(struct v4l2_subdev *sd, int on)
456 {
457 struct i2c_client *client = v4l2_get_subdevdata(sd);
458 struct ov6650 *priv = to_ov6650(client);
459 int ret = 0;
460
461 if (on)
462 ret = v4l2_clk_enable(priv->clk);
463 else
464 v4l2_clk_disable(priv->clk);
465
466 return ret;
467 }
468
469 static int ov6650_get_selection(struct v4l2_subdev *sd,
470 struct v4l2_subdev_pad_config *cfg,
471 struct v4l2_subdev_selection *sel)
472 {
473 struct i2c_client *client = v4l2_get_subdevdata(sd);
474 struct ov6650 *priv = to_ov6650(client);
475
476 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
477 return -EINVAL;
478
479 switch (sel->target) {
480 case V4L2_SEL_TGT_CROP_BOUNDS:
481 sel->r.left = DEF_HSTRT << 1;
482 sel->r.top = DEF_VSTRT << 1;
483 sel->r.width = W_CIF;
484 sel->r.height = H_CIF;
485 return 0;
486 case V4L2_SEL_TGT_CROP:
487 sel->r = priv->rect;
488 return 0;
489 default:
490 return -EINVAL;
491 }
492 }
493
494 static int ov6650_set_selection(struct v4l2_subdev *sd,
495 struct v4l2_subdev_pad_config *cfg,
496 struct v4l2_subdev_selection *sel)
497 {
498 struct i2c_client *client = v4l2_get_subdevdata(sd);
499 struct ov6650 *priv = to_ov6650(client);
500 int ret;
501
502 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE ||
503 sel->target != V4L2_SEL_TGT_CROP)
504 return -EINVAL;
505
506 v4l_bound_align_image(&sel->r.width, 2, W_CIF, 1,
507 &sel->r.height, 2, H_CIF, 1, 0);
508 v4l_bound_align_image(&sel->r.left, DEF_HSTRT << 1,
509 (DEF_HSTRT << 1) + W_CIF - (__s32)sel->r.width, 1,
510 &sel->r.top, DEF_VSTRT << 1,
511 (DEF_VSTRT << 1) + H_CIF - (__s32)sel->r.height,
512 1, 0);
513
514 ret = ov6650_reg_write(client, REG_HSTRT, sel->r.left >> 1);
515 if (!ret) {
516 priv->rect.width += priv->rect.left - sel->r.left;
517 priv->rect.left = sel->r.left;
518 ret = ov6650_reg_write(client, REG_HSTOP,
519 (sel->r.left + sel->r.width) >> 1);
520 }
521 if (!ret) {
522 priv->rect.width = sel->r.width;
523 ret = ov6650_reg_write(client, REG_VSTRT, sel->r.top >> 1);
524 }
525 if (!ret) {
526 priv->rect.height += priv->rect.top - sel->r.top;
527 priv->rect.top = sel->r.top;
528 ret = ov6650_reg_write(client, REG_VSTOP,
529 (sel->r.top + sel->r.height) >> 1);
530 }
531 if (!ret)
532 priv->rect.height = sel->r.height;
533
534 return ret;
535 }
536
537 static int ov6650_get_fmt(struct v4l2_subdev *sd,
538 struct v4l2_subdev_pad_config *cfg,
539 struct v4l2_subdev_format *format)
540 {
541 struct v4l2_mbus_framefmt *mf = &format->format;
542 struct i2c_client *client = v4l2_get_subdevdata(sd);
543 struct ov6650 *priv = to_ov6650(client);
544
545 if (format->pad)
546 return -EINVAL;
547
548 /* initialize response with default media bus frame format */
549 *mf = ov6650_def_fmt;
550
551 /* update media bus format code and frame size */
552 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
553 mf->width = cfg->try_fmt.width;
554 mf->height = cfg->try_fmt.height;
555 mf->code = cfg->try_fmt.code;
556
557 } else {
558 mf->width = priv->rect.width >> priv->half_scale;
559 mf->height = priv->rect.height >> priv->half_scale;
560 mf->code = priv->code;
561 }
562 return 0;
563 }
564
565 static bool is_unscaled_ok(int width, int height, struct v4l2_rect *rect)
566 {
567 return width > rect->width >> 1 || height > rect->height >> 1;
568 }
569
570 #define to_clkrc(div) ((div) - 1)
571
572 /* set the format we will capture in */
573 static int ov6650_s_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf)
574 {
575 struct i2c_client *client = v4l2_get_subdevdata(sd);
576 struct ov6650 *priv = to_ov6650(client);
577 bool half_scale = !is_unscaled_ok(mf->width, mf->height, &priv->rect);
578 struct v4l2_subdev_selection sel = {
579 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
580 .target = V4L2_SEL_TGT_CROP,
581 .r.left = priv->rect.left + (priv->rect.width >> 1) -
582 (mf->width >> (1 - half_scale)),
583 .r.top = priv->rect.top + (priv->rect.height >> 1) -
584 (mf->height >> (1 - half_scale)),
585 .r.width = mf->width << half_scale,
586 .r.height = mf->height << half_scale,
587 };
588 u32 code = mf->code;
589 u8 coma_set = 0, coma_mask = 0, coml_set, coml_mask;
590 int ret;
591
592 /* select color matrix configuration for given color encoding */
593 switch (code) {
594 case MEDIA_BUS_FMT_Y8_1X8:
595 dev_dbg(&client->dev, "pixel format GREY8_1X8\n");
596 coma_mask |= COMA_RGB | COMA_WORD_SWAP | COMA_BYTE_SWAP;
597 coma_set |= COMA_BW;
598 break;
599 case MEDIA_BUS_FMT_YUYV8_2X8:
600 dev_dbg(&client->dev, "pixel format YUYV8_2X8_LE\n");
601 coma_mask |= COMA_RGB | COMA_BW | COMA_BYTE_SWAP;
602 coma_set |= COMA_WORD_SWAP;
603 break;
604 case MEDIA_BUS_FMT_YVYU8_2X8:
605 dev_dbg(&client->dev, "pixel format YVYU8_2X8_LE (untested)\n");
606 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP |
607 COMA_BYTE_SWAP;
608 break;
609 case MEDIA_BUS_FMT_UYVY8_2X8:
610 dev_dbg(&client->dev, "pixel format YUYV8_2X8_BE\n");
611 if (half_scale) {
612 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP;
613 coma_set |= COMA_BYTE_SWAP;
614 } else {
615 coma_mask |= COMA_RGB | COMA_BW;
616 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP;
617 }
618 break;
619 case MEDIA_BUS_FMT_VYUY8_2X8:
620 dev_dbg(&client->dev, "pixel format YVYU8_2X8_BE (untested)\n");
621 if (half_scale) {
622 coma_mask |= COMA_RGB | COMA_BW;
623 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP;
624 } else {
625 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP;
626 coma_set |= COMA_BYTE_SWAP;
627 }
628 break;
629 case MEDIA_BUS_FMT_SBGGR8_1X8:
630 dev_dbg(&client->dev, "pixel format SBGGR8_1X8 (untested)\n");
631 coma_mask |= COMA_BW | COMA_BYTE_SWAP | COMA_WORD_SWAP;
632 coma_set |= COMA_RAW_RGB | COMA_RGB;
633 break;
634 default:
635 dev_err(&client->dev, "Pixel format not handled: 0x%x\n", code);
636 return -EINVAL;
637 }
638
639 if (code == MEDIA_BUS_FMT_Y8_1X8 ||
640 code == MEDIA_BUS_FMT_SBGGR8_1X8) {
641 coml_mask = COML_ONE_CHANNEL;
642 coml_set = 0;
643 } else {
644 coml_mask = 0;
645 coml_set = COML_ONE_CHANNEL;
646 }
647
648 if (half_scale) {
649 dev_dbg(&client->dev, "max resolution: QCIF\n");
650 coma_set |= COMA_QCIF;
651 } else {
652 dev_dbg(&client->dev, "max resolution: CIF\n");
653 coma_mask |= COMA_QCIF;
654 }
655
656 ret = ov6650_set_selection(sd, NULL, &sel);
657 if (!ret)
658 ret = ov6650_reg_rmw(client, REG_COMA, coma_set, coma_mask);
659 if (!ret) {
660 priv->half_scale = half_scale;
661
662 ret = ov6650_reg_rmw(client, REG_COML, coml_set, coml_mask);
663 }
664 if (!ret)
665 priv->code = code;
666
667 return ret;
668 }
669
670 static int ov6650_set_fmt(struct v4l2_subdev *sd,
671 struct v4l2_subdev_pad_config *cfg,
672 struct v4l2_subdev_format *format)
673 {
674 struct v4l2_mbus_framefmt *mf = &format->format;
675 struct i2c_client *client = v4l2_get_subdevdata(sd);
676 struct ov6650 *priv = to_ov6650(client);
677
678 if (format->pad)
679 return -EINVAL;
680
681 if (is_unscaled_ok(mf->width, mf->height, &priv->rect))
682 v4l_bound_align_image(&mf->width, 2, W_CIF, 1,
683 &mf->height, 2, H_CIF, 1, 0);
684
685 switch (mf->code) {
686 case MEDIA_BUS_FMT_Y10_1X10:
687 mf->code = MEDIA_BUS_FMT_Y8_1X8;
688 /* fall through */
689 case MEDIA_BUS_FMT_Y8_1X8:
690 case MEDIA_BUS_FMT_YVYU8_2X8:
691 case MEDIA_BUS_FMT_YUYV8_2X8:
692 case MEDIA_BUS_FMT_VYUY8_2X8:
693 case MEDIA_BUS_FMT_UYVY8_2X8:
694 break;
695 default:
696 mf->code = MEDIA_BUS_FMT_SBGGR8_1X8;
697 /* fall through */
698 case MEDIA_BUS_FMT_SBGGR8_1X8:
699 break;
700 }
701
702 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
703 /* store media bus format code and frame size in pad config */
704 cfg->try_fmt.width = mf->width;
705 cfg->try_fmt.height = mf->height;
706 cfg->try_fmt.code = mf->code;
707
708 /* return default mbus frame format updated with pad config */
709 *mf = ov6650_def_fmt;
710 mf->width = cfg->try_fmt.width;
711 mf->height = cfg->try_fmt.height;
712 mf->code = cfg->try_fmt.code;
713
714 } else {
715 /* apply new media bus format code and frame size */
716 int ret = ov6650_s_fmt(sd, mf);
717
718 if (ret)
719 return ret;
720
721 /* return default format updated with active size and code */
722 *mf = ov6650_def_fmt;
723 mf->width = priv->rect.width >> priv->half_scale;
724 mf->height = priv->rect.height >> priv->half_scale;
725 mf->code = priv->code;
726 }
727 return 0;
728 }
729
730 static int ov6650_enum_mbus_code(struct v4l2_subdev *sd,
731 struct v4l2_subdev_pad_config *cfg,
732 struct v4l2_subdev_mbus_code_enum *code)
733 {
734 if (code->pad || code->index >= ARRAY_SIZE(ov6650_codes))
735 return -EINVAL;
736
737 code->code = ov6650_codes[code->index];
738 return 0;
739 }
740
741 static int ov6650_g_frame_interval(struct v4l2_subdev *sd,
742 struct v4l2_subdev_frame_interval *ival)
743 {
744 struct i2c_client *client = v4l2_get_subdevdata(sd);
745 struct ov6650 *priv = to_ov6650(client);
746
747 ival->interval = priv->tpf;
748
749 dev_dbg(&client->dev, "Frame interval: %u/%u s\n",
750 ival->interval.numerator, ival->interval.denominator);
751
752 return 0;
753 }
754
755 static int ov6650_s_frame_interval(struct v4l2_subdev *sd,
756 struct v4l2_subdev_frame_interval *ival)
757 {
758 struct i2c_client *client = v4l2_get_subdevdata(sd);
759 struct ov6650 *priv = to_ov6650(client);
760 struct v4l2_fract *tpf = &ival->interval;
761 int div, ret;
762
763 if (tpf->numerator == 0 || tpf->denominator == 0)
764 div = 1; /* Reset to full rate */
765 else
766 div = (tpf->numerator * FRAME_RATE_MAX) / tpf->denominator;
767
768 if (div == 0)
769 div = 1;
770 else if (div > GET_CLKRC_DIV(CLKRC_DIV_MASK))
771 div = GET_CLKRC_DIV(CLKRC_DIV_MASK);
772
773 ret = ov6650_reg_rmw(client, REG_CLKRC, to_clkrc(div), CLKRC_DIV_MASK);
774 if (!ret) {
775 priv->tpf.numerator = div;
776 priv->tpf.denominator = FRAME_RATE_MAX;
777
778 *tpf = priv->tpf;
779 }
780
781 return ret;
782 }
783
784 /* Soft reset the camera. This has nothing to do with the RESET pin! */
785 static int ov6650_reset(struct i2c_client *client)
786 {
787 int ret;
788
789 dev_dbg(&client->dev, "reset\n");
790
791 ret = ov6650_reg_rmw(client, REG_COMA, COMA_RESET, 0);
792 if (ret)
793 dev_err(&client->dev,
794 "An error occurred while entering soft reset!\n");
795
796 return ret;
797 }
798
799 /* program default register values */
800 static int ov6650_prog_dflt(struct i2c_client *client, u8 clkrc)
801 {
802 int ret;
803
804 dev_dbg(&client->dev, "initializing\n");
805
806 ret = ov6650_reg_write(client, REG_COMA, 0); /* ~COMA_RESET */
807 if (!ret)
808 ret = ov6650_reg_write(client, REG_CLKRC, clkrc);
809 if (!ret)
810 ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_BAND_FILTER);
811
812 return ret;
813 }
814
815 static int ov6650_video_probe(struct v4l2_subdev *sd)
816 {
817 struct i2c_client *client = v4l2_get_subdevdata(sd);
818 struct ov6650 *priv = to_ov6650(client);
819 const struct ov6650_xclk *xclk = NULL;
820 unsigned long rate;
821 u8 pidh, pidl, midh, midl;
822 int i, ret = 0;
823
824 priv->clk = v4l2_clk_get(&client->dev, NULL);
825 if (IS_ERR(priv->clk)) {
826 ret = PTR_ERR(priv->clk);
827 dev_err(&client->dev, "v4l2_clk request err: %d\n", ret);
828 return ret;
829 }
830
831 rate = v4l2_clk_get_rate(priv->clk);
832 for (i = 0; rate && i < ARRAY_SIZE(ov6650_xclk); i++) {
833 if (rate != ov6650_xclk[i].rate)
834 continue;
835
836 xclk = &ov6650_xclk[i];
837 dev_info(&client->dev, "using host default clock rate %lukHz\n",
838 rate / 1000);
839 break;
840 }
841 for (i = 0; !xclk && i < ARRAY_SIZE(ov6650_xclk); i++) {
842 ret = v4l2_clk_set_rate(priv->clk, ov6650_xclk[i].rate);
843 if (ret || v4l2_clk_get_rate(priv->clk) != ov6650_xclk[i].rate)
844 continue;
845
846 xclk = &ov6650_xclk[i];
847 dev_info(&client->dev, "using negotiated clock rate %lukHz\n",
848 xclk->rate / 1000);
849 break;
850 }
851 if (!xclk) {
852 dev_err(&client->dev, "unable to get supported clock rate\n");
853 if (!ret)
854 ret = -EINVAL;
855 goto eclkput;
856 }
857
858 ret = ov6650_s_power(sd, 1);
859 if (ret < 0)
860 goto eclkput;
861
862 msleep(20);
863
864 /*
865 * check and show product ID and manufacturer ID
866 */
867 ret = ov6650_reg_read(client, REG_PIDH, &pidh);
868 if (!ret)
869 ret = ov6650_reg_read(client, REG_PIDL, &pidl);
870 if (!ret)
871 ret = ov6650_reg_read(client, REG_MIDH, &midh);
872 if (!ret)
873 ret = ov6650_reg_read(client, REG_MIDL, &midl);
874
875 if (ret)
876 goto done;
877
878 if ((pidh != OV6650_PIDH) || (pidl != OV6650_PIDL)) {
879 dev_err(&client->dev, "Product ID error 0x%02x:0x%02x\n",
880 pidh, pidl);
881 ret = -ENODEV;
882 goto done;
883 }
884
885 dev_info(&client->dev,
886 "ov6650 Product ID 0x%02x:0x%02x Manufacturer ID 0x%02x:0x%02x\n",
887 pidh, pidl, midh, midl);
888
889 ret = ov6650_reset(client);
890 if (!ret)
891 ret = ov6650_prog_dflt(client, xclk->clkrc);
892 if (!ret) {
893 struct v4l2_mbus_framefmt mf = ov6650_def_fmt;
894
895 ret = ov6650_s_fmt(sd, &mf);
896 }
897 if (!ret)
898 ret = v4l2_ctrl_handler_setup(&priv->hdl);
899
900 done:
901 ov6650_s_power(sd, 0);
902 if (!ret)
903 return 0;
904 eclkput:
905 v4l2_clk_put(priv->clk);
906
907 return ret;
908 }
909
910 static const struct v4l2_ctrl_ops ov6550_ctrl_ops = {
911 .g_volatile_ctrl = ov6550_g_volatile_ctrl,
912 .s_ctrl = ov6550_s_ctrl,
913 };
914
915 static const struct v4l2_subdev_core_ops ov6650_core_ops = {
916 #ifdef CONFIG_VIDEO_ADV_DEBUG
917 .g_register = ov6650_get_register,
918 .s_register = ov6650_set_register,
919 #endif
920 .s_power = ov6650_s_power,
921 };
922
923 /* Request bus settings on camera side */
924 static int ov6650_g_mbus_config(struct v4l2_subdev *sd,
925 struct v4l2_mbus_config *cfg)
926 {
927
928 cfg->flags = V4L2_MBUS_MASTER |
929 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
930 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
931 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
932 V4L2_MBUS_DATA_ACTIVE_HIGH;
933 cfg->type = V4L2_MBUS_PARALLEL;
934
935 return 0;
936 }
937
938 /* Alter bus settings on camera side */
939 static int ov6650_s_mbus_config(struct v4l2_subdev *sd,
940 const struct v4l2_mbus_config *cfg)
941 {
942 struct i2c_client *client = v4l2_get_subdevdata(sd);
943 int ret;
944
945 if (cfg->flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
946 ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_PCLK_RISING, 0);
947 else
948 ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_PCLK_RISING);
949 if (ret)
950 return ret;
951
952 if (cfg->flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
953 ret = ov6650_reg_rmw(client, REG_COMF, COMF_HREF_LOW, 0);
954 else
955 ret = ov6650_reg_rmw(client, REG_COMF, 0, COMF_HREF_LOW);
956 if (ret)
957 return ret;
958
959 if (cfg->flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
960 ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_VSYNC_HIGH, 0);
961 else
962 ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_VSYNC_HIGH);
963
964 return ret;
965 }
966
967 static const struct v4l2_subdev_video_ops ov6650_video_ops = {
968 .s_stream = ov6650_s_stream,
969 .g_frame_interval = ov6650_g_frame_interval,
970 .s_frame_interval = ov6650_s_frame_interval,
971 .g_mbus_config = ov6650_g_mbus_config,
972 .s_mbus_config = ov6650_s_mbus_config,
973 };
974
975 static const struct v4l2_subdev_pad_ops ov6650_pad_ops = {
976 .enum_mbus_code = ov6650_enum_mbus_code,
977 .get_selection = ov6650_get_selection,
978 .set_selection = ov6650_set_selection,
979 .get_fmt = ov6650_get_fmt,
980 .set_fmt = ov6650_set_fmt,
981 };
982
983 static const struct v4l2_subdev_ops ov6650_subdev_ops = {
984 .core = &ov6650_core_ops,
985 .video = &ov6650_video_ops,
986 .pad = &ov6650_pad_ops,
987 };
988
989 static const struct v4l2_subdev_internal_ops ov6650_internal_ops = {
990 .registered = ov6650_video_probe,
991 };
992
993 /*
994 * i2c_driver function
995 */
996 static int ov6650_probe(struct i2c_client *client,
997 const struct i2c_device_id *did)
998 {
999 struct ov6650 *priv;
1000 int ret;
1001
1002 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
1003 if (!priv)
1004 return -ENOMEM;
1005
1006 v4l2_i2c_subdev_init(&priv->subdev, client, &ov6650_subdev_ops);
1007 v4l2_ctrl_handler_init(&priv->hdl, 13);
1008 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1009 V4L2_CID_VFLIP, 0, 1, 1, 0);
1010 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1011 V4L2_CID_HFLIP, 0, 1, 1, 0);
1012 priv->autogain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1013 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
1014 priv->gain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1015 V4L2_CID_GAIN, 0, 0x3f, 1, DEF_GAIN);
1016 priv->autowb = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1017 V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
1018 priv->blue = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1019 V4L2_CID_BLUE_BALANCE, 0, 0xff, 1, DEF_BLUE);
1020 priv->red = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1021 V4L2_CID_RED_BALANCE, 0, 0xff, 1, DEF_RED);
1022 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1023 V4L2_CID_SATURATION, 0, 0xf, 1, 0x8);
1024 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1025 V4L2_CID_HUE, 0, HUE_MASK, 1, DEF_HUE);
1026 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1027 V4L2_CID_BRIGHTNESS, 0, 0xff, 1, 0x80);
1028 priv->autoexposure = v4l2_ctrl_new_std_menu(&priv->hdl,
1029 &ov6550_ctrl_ops, V4L2_CID_EXPOSURE_AUTO,
1030 V4L2_EXPOSURE_MANUAL, 0, V4L2_EXPOSURE_AUTO);
1031 priv->exposure = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1032 V4L2_CID_EXPOSURE, 0, 0xff, 1, DEF_AECH);
1033 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1034 V4L2_CID_GAMMA, 0, 0xff, 1, 0x12);
1035
1036 priv->subdev.ctrl_handler = &priv->hdl;
1037 if (priv->hdl.error) {
1038 ret = priv->hdl.error;
1039 goto ectlhdlfree;
1040 }
1041
1042 v4l2_ctrl_auto_cluster(2, &priv->autogain, 0, true);
1043 v4l2_ctrl_auto_cluster(3, &priv->autowb, 0, true);
1044 v4l2_ctrl_auto_cluster(2, &priv->autoexposure,
1045 V4L2_EXPOSURE_MANUAL, true);
1046
1047 priv->rect.left = DEF_HSTRT << 1;
1048 priv->rect.top = DEF_VSTRT << 1;
1049 priv->rect.width = W_CIF;
1050 priv->rect.height = H_CIF;
1051
1052 /* Hardware default frame interval */
1053 priv->tpf.numerator = GET_CLKRC_DIV(DEF_CLKRC);
1054 priv->tpf.denominator = FRAME_RATE_MAX;
1055
1056 priv->subdev.internal_ops = &ov6650_internal_ops;
1057
1058 ret = v4l2_async_register_subdev(&priv->subdev);
1059 if (!ret)
1060 return 0;
1061 ectlhdlfree:
1062 v4l2_ctrl_handler_free(&priv->hdl);
1063
1064 return ret;
1065 }
1066
1067 static int ov6650_remove(struct i2c_client *client)
1068 {
1069 struct ov6650 *priv = to_ov6650(client);
1070
1071 v4l2_clk_put(priv->clk);
1072 v4l2_async_unregister_subdev(&priv->subdev);
1073 v4l2_ctrl_handler_free(&priv->hdl);
1074 return 0;
1075 }
1076
1077 static const struct i2c_device_id ov6650_id[] = {
1078 { "ov6650", 0 },
1079 { }
1080 };
1081 MODULE_DEVICE_TABLE(i2c, ov6650_id);
1082
1083 static struct i2c_driver ov6650_i2c_driver = {
1084 .driver = {
1085 .name = "ov6650",
1086 },
1087 .probe = ov6650_probe,
1088 .remove = ov6650_remove,
1089 .id_table = ov6650_id,
1090 };
1091
1092 module_i2c_driver(ov6650_i2c_driver);
1093
1094 MODULE_DESCRIPTION("V4L2 subdevice driver for OmniVision OV6650 camera sensor");
1095 MODULE_AUTHOR("Janusz Krzysztofik <jmkrzyszt@gmail.com");
1096 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support