2 * V4L2 SoC Camera driver for OmniVision OV6650 Camera Sensor
4 * Copyright (C) 2010 Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
6 * Based on OmniVision OV96xx Camera Driver
7 * Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com>
9 * Based on ov772x camera driver:
10 * Copyright (C) 2008 Renesas Solutions Corp.
11 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
13 * Based on ov7670 and soc_camera_platform driver,
14 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
15 * Copyright (C) 2008 Magnus Damm
16 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
18 * Hardware specific bits initialy based on former work by Matt Callow
19 * drivers/media/video/omap/sensor_ov6650.c
20 * Copyright (C) 2006 Matt Callow
22 * This program is free software; you can redistribute it and/or modify
23 * it under the terms of the GNU General Public License version 2 as
24 * published by the Free Software Foundation.
27 #include <linux/bitops.h>
28 #include <linux/delay.h>
29 #include <linux/i2c.h>
30 #include <linux/slab.h>
31 #include <linux/v4l2-mediabus.h>
32 #include <linux/module.h>
34 #include <media/soc_camera.h>
35 #include <media/v4l2-clk.h>
36 #include <media/v4l2-ctrls.h>
38 /* Register definitions */
39 #define REG_GAIN 0x00 /* range 00 - 3F */
42 #define REG_SAT 0x03 /* [7:4] saturation [0:3] reserved */
43 #define REG_HUE 0x04 /* [7:6] rsrvd [5] hue en [4:0] hue */
51 #define REG_CLKRC 0x11 /* Data Format and Internal Clock */
52 /* [7:6] Input system clock (MHz)*/
53 /* 00=8, 01=12, 10=16, 11=24 */
54 /* [5:0]: Internal Clock Pre-Scaler */
55 #define REG_COMA 0x12 /* [7] Reset */
60 #define REG_HSTRT 0x17
61 #define REG_HSTOP 0x18
62 #define REG_VSTRT 0x19
63 #define REG_VSTOP 0x1a
64 #define REG_PSHFT 0x1b
67 #define REG_HSYNS 0x1e
68 #define REG_HSYNE 0x1f
80 #define REG_FRARL 0x2b
87 #define REG_FRAJH 0x32
88 #define REG_FRAJL 0x33
90 #define REG_L1AEC 0x35
101 #define REG_SPCE 0x68
102 #define REG_ADCL 0x69
104 #define REG_RMCO 0x6c
105 #define REG_GMCO 0x6d
106 #define REG_BMCO 0x6e
109 /* Register bits, values, etc. */
110 #define OV6650_PIDH 0x66 /* high byte of product ID number */
111 #define OV6650_PIDL 0x50 /* low byte of product ID number */
112 #define OV6650_MIDH 0x7F /* high byte of mfg ID */
113 #define OV6650_MIDL 0xA2 /* low byte of mfg ID */
115 #define DEF_GAIN 0x00
116 #define DEF_BLUE 0x80
120 #define SAT_MASK (0xf << SAT_SHIFT)
121 #define SET_SAT(x) (((x) << SAT_SHIFT) & SAT_MASK)
123 #define HUE_EN BIT(5)
124 #define HUE_MASK 0x1f
126 #define SET_HUE(x) (HUE_EN | ((x) & HUE_MASK))
128 #define DEF_AECH 0x4D
130 #define CLKRC_6MHz 0x00
131 #define CLKRC_12MHz 0x40
132 #define CLKRC_16MHz 0x80
133 #define CLKRC_24MHz 0xc0
134 #define CLKRC_DIV_MASK 0x3f
135 #define GET_CLKRC_DIV(x) (((x) & CLKRC_DIV_MASK) + 1)
137 #define COMA_RESET BIT(7)
138 #define COMA_QCIF BIT(5)
139 #define COMA_RAW_RGB BIT(4)
140 #define COMA_RGB BIT(3)
141 #define COMA_BW BIT(2)
142 #define COMA_WORD_SWAP BIT(1)
143 #define COMA_BYTE_SWAP BIT(0)
144 #define DEF_COMA 0x00
146 #define COMB_FLIP_V BIT(7)
147 #define COMB_FLIP_H BIT(5)
148 #define COMB_BAND_FILTER BIT(4)
149 #define COMB_AWB BIT(2)
150 #define COMB_AGC BIT(1)
151 #define COMB_AEC BIT(0)
152 #define DEF_COMB 0x5f
154 #define COML_ONE_CHANNEL BIT(7)
156 #define DEF_HSTRT 0x24
157 #define DEF_HSTOP 0xd4
158 #define DEF_VSTRT 0x04
159 #define DEF_VSTOP 0x94
161 #define COMF_HREF_LOW BIT(4)
163 #define COMJ_PCLK_RISING BIT(4)
164 #define COMJ_VSYNC_HIGH BIT(0)
166 /* supported resolutions */
167 #define W_QCIF (DEF_HSTOP - DEF_HSTRT)
168 #define W_CIF (W_QCIF << 1)
169 #define H_QCIF (DEF_VSTOP - DEF_VSTRT)
170 #define H_CIF (H_QCIF << 1)
172 #define FRAME_RATE_MAX 30
181 struct v4l2_subdev subdev;
182 struct v4l2_ctrl_handler hdl;
184 /* exposure/autoexposure cluster */
185 struct v4l2_ctrl *autoexposure;
186 struct v4l2_ctrl *exposure;
189 /* gain/autogain cluster */
190 struct v4l2_ctrl *autogain;
191 struct v4l2_ctrl *gain;
194 /* blue/red/autowhitebalance cluster */
195 struct v4l2_ctrl *autowb;
196 struct v4l2_ctrl *blue;
197 struct v4l2_ctrl *red;
199 struct v4l2_clk *clk;
200 bool half_scale; /* scale down output by 2 */
201 struct v4l2_rect rect; /* sensor cropping window */
202 unsigned long pclk_limit; /* from host */
203 unsigned long pclk_max; /* from resolution and format */
204 struct v4l2_fract tpf; /* as requested with s_parm */
206 enum v4l2_colorspace colorspace;
210 static u32 ov6650_codes[] = {
211 MEDIA_BUS_FMT_YUYV8_2X8,
212 MEDIA_BUS_FMT_UYVY8_2X8,
213 MEDIA_BUS_FMT_YVYU8_2X8,
214 MEDIA_BUS_FMT_VYUY8_2X8,
215 MEDIA_BUS_FMT_SBGGR8_1X8,
216 MEDIA_BUS_FMT_Y8_1X8,
219 /* read a register */
220 static int ov6650_reg_read(struct i2c_client *client, u8 reg, u8 *val)
224 struct i2c_msg msg = {
225 .addr = client->addr,
231 ret = i2c_transfer(client->adapter, &msg, 1);
235 msg.flags = I2C_M_RD;
236 ret = i2c_transfer(client->adapter, &msg, 1);
244 dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg);
248 /* write a register */
249 static int ov6650_reg_write(struct i2c_client *client, u8 reg, u8 val)
252 unsigned char data[2] = { reg, val };
253 struct i2c_msg msg = {
254 .addr = client->addr,
260 ret = i2c_transfer(client->adapter, &msg, 1);
264 dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg);
271 /* Read a register, alter its bits, write it back */
272 static int ov6650_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 mask)
277 ret = ov6650_reg_read(client, reg, &val);
279 dev_err(&client->dev,
280 "[Read]-Modify-Write of register 0x%02x failed!\n",
288 ret = ov6650_reg_write(client, reg, val);
290 dev_err(&client->dev,
291 "Read-Modify-[Write] of register 0x%02x failed!\n",
297 static struct ov6650 *to_ov6650(const struct i2c_client *client)
299 return container_of(i2c_get_clientdata(client), struct ov6650, subdev);
302 /* Start/Stop streaming from the device */
303 static int ov6650_s_stream(struct v4l2_subdev *sd, int enable)
308 /* Get status of additional camera capabilities */
309 static int ov6550_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
311 struct ov6650 *priv = container_of(ctrl->handler, struct ov6650, hdl);
312 struct v4l2_subdev *sd = &priv->subdev;
313 struct i2c_client *client = v4l2_get_subdevdata(sd);
318 case V4L2_CID_AUTOGAIN:
319 ret = ov6650_reg_read(client, REG_GAIN, ®);
321 priv->gain->val = reg;
323 case V4L2_CID_AUTO_WHITE_BALANCE:
324 ret = ov6650_reg_read(client, REG_BLUE, ®);
326 ret = ov6650_reg_read(client, REG_RED, ®2);
328 priv->blue->val = reg;
329 priv->red->val = reg2;
332 case V4L2_CID_EXPOSURE_AUTO:
333 ret = ov6650_reg_read(client, REG_AECH, ®);
335 priv->exposure->val = reg;
341 /* Set status of additional camera capabilities */
342 static int ov6550_s_ctrl(struct v4l2_ctrl *ctrl)
344 struct ov6650 *priv = container_of(ctrl->handler, struct ov6650, hdl);
345 struct v4l2_subdev *sd = &priv->subdev;
346 struct i2c_client *client = v4l2_get_subdevdata(sd);
350 case V4L2_CID_AUTOGAIN:
351 ret = ov6650_reg_rmw(client, REG_COMB,
352 ctrl->val ? COMB_AGC : 0, COMB_AGC);
353 if (!ret && !ctrl->val)
354 ret = ov6650_reg_write(client, REG_GAIN, priv->gain->val);
356 case V4L2_CID_AUTO_WHITE_BALANCE:
357 ret = ov6650_reg_rmw(client, REG_COMB,
358 ctrl->val ? COMB_AWB : 0, COMB_AWB);
359 if (!ret && !ctrl->val) {
360 ret = ov6650_reg_write(client, REG_BLUE, priv->blue->val);
362 ret = ov6650_reg_write(client, REG_RED,
366 case V4L2_CID_SATURATION:
367 return ov6650_reg_rmw(client, REG_SAT, SET_SAT(ctrl->val),
370 return ov6650_reg_rmw(client, REG_HUE, SET_HUE(ctrl->val),
372 case V4L2_CID_BRIGHTNESS:
373 return ov6650_reg_write(client, REG_BRT, ctrl->val);
374 case V4L2_CID_EXPOSURE_AUTO:
375 ret = ov6650_reg_rmw(client, REG_COMB, ctrl->val ==
376 V4L2_EXPOSURE_AUTO ? COMB_AEC : 0, COMB_AEC);
377 if (!ret && ctrl->val == V4L2_EXPOSURE_MANUAL)
378 ret = ov6650_reg_write(client, REG_AECH,
379 priv->exposure->val);
382 return ov6650_reg_write(client, REG_GAM1, ctrl->val);
384 return ov6650_reg_rmw(client, REG_COMB,
385 ctrl->val ? COMB_FLIP_V : 0, COMB_FLIP_V);
387 return ov6650_reg_rmw(client, REG_COMB,
388 ctrl->val ? COMB_FLIP_H : 0, COMB_FLIP_H);
394 #ifdef CONFIG_VIDEO_ADV_DEBUG
395 static int ov6650_get_register(struct v4l2_subdev *sd,
396 struct v4l2_dbg_register *reg)
398 struct i2c_client *client = v4l2_get_subdevdata(sd);
402 if (reg->reg & ~0xff)
407 ret = ov6650_reg_read(client, reg->reg, &val);
409 reg->val = (__u64)val;
414 static int ov6650_set_register(struct v4l2_subdev *sd,
415 const struct v4l2_dbg_register *reg)
417 struct i2c_client *client = v4l2_get_subdevdata(sd);
419 if (reg->reg & ~0xff || reg->val & ~0xff)
422 return ov6650_reg_write(client, reg->reg, reg->val);
426 static int ov6650_s_power(struct v4l2_subdev *sd, int on)
428 struct i2c_client *client = v4l2_get_subdevdata(sd);
429 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
430 struct ov6650 *priv = to_ov6650(client);
432 return soc_camera_set_power(&client->dev, ssdd, priv->clk, on);
435 static int ov6650_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
437 struct i2c_client *client = v4l2_get_subdevdata(sd);
438 struct ov6650 *priv = to_ov6650(client);
440 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
446 static int ov6650_s_crop(struct v4l2_subdev *sd, const struct v4l2_crop *a)
448 struct i2c_client *client = v4l2_get_subdevdata(sd);
449 struct ov6650 *priv = to_ov6650(client);
450 struct v4l2_rect rect = a->c;
453 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
456 rect.left = ALIGN(rect.left, 2);
457 rect.width = ALIGN(rect.width, 2);
458 rect.top = ALIGN(rect.top, 2);
459 rect.height = ALIGN(rect.height, 2);
460 soc_camera_limit_side(&rect.left, &rect.width,
461 DEF_HSTRT << 1, 2, W_CIF);
462 soc_camera_limit_side(&rect.top, &rect.height,
463 DEF_VSTRT << 1, 2, H_CIF);
465 ret = ov6650_reg_write(client, REG_HSTRT, rect.left >> 1);
467 priv->rect.left = rect.left;
468 ret = ov6650_reg_write(client, REG_HSTOP,
469 (rect.left + rect.width) >> 1);
472 priv->rect.width = rect.width;
473 ret = ov6650_reg_write(client, REG_VSTRT, rect.top >> 1);
476 priv->rect.top = rect.top;
477 ret = ov6650_reg_write(client, REG_VSTOP,
478 (rect.top + rect.height) >> 1);
481 priv->rect.height = rect.height;
486 static int ov6650_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
488 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
491 a->bounds.left = DEF_HSTRT << 1;
492 a->bounds.top = DEF_VSTRT << 1;
493 a->bounds.width = W_CIF;
494 a->bounds.height = H_CIF;
495 a->defrect = a->bounds;
496 a->pixelaspect.numerator = 1;
497 a->pixelaspect.denominator = 1;
502 static int ov6650_get_fmt(struct v4l2_subdev *sd,
503 struct v4l2_subdev_pad_config *cfg,
504 struct v4l2_subdev_format *format)
506 struct v4l2_mbus_framefmt *mf = &format->format;
507 struct i2c_client *client = v4l2_get_subdevdata(sd);
508 struct ov6650 *priv = to_ov6650(client);
513 mf->width = priv->rect.width >> priv->half_scale;
514 mf->height = priv->rect.height >> priv->half_scale;
515 mf->code = priv->code;
516 mf->colorspace = priv->colorspace;
517 mf->field = V4L2_FIELD_NONE;
522 static bool is_unscaled_ok(int width, int height, struct v4l2_rect *rect)
524 return width > rect->width >> 1 || height > rect->height >> 1;
527 static u8 to_clkrc(struct v4l2_fract *timeperframe,
528 unsigned long pclk_limit, unsigned long pclk_max)
532 if (timeperframe->numerator && timeperframe->denominator)
533 pclk = pclk_max * timeperframe->denominator /
534 (FRAME_RATE_MAX * timeperframe->numerator);
538 if (pclk_limit && pclk_limit < pclk)
541 return (pclk_max - 1) / pclk;
544 /* set the format we will capture in */
545 static int ov6650_s_fmt(struct v4l2_subdev *sd, struct v4l2_mbus_framefmt *mf)
547 struct i2c_client *client = v4l2_get_subdevdata(sd);
548 struct soc_camera_device *icd = v4l2_get_subdev_hostdata(sd);
549 struct soc_camera_sense *sense = icd->sense;
550 struct ov6650 *priv = to_ov6650(client);
551 bool half_scale = !is_unscaled_ok(mf->width, mf->height, &priv->rect);
552 struct v4l2_crop a = {
553 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
555 .left = priv->rect.left + (priv->rect.width >> 1) -
556 (mf->width >> (1 - half_scale)),
557 .top = priv->rect.top + (priv->rect.height >> 1) -
558 (mf->height >> (1 - half_scale)),
559 .width = mf->width << half_scale,
560 .height = mf->height << half_scale,
564 unsigned long mclk, pclk;
565 u8 coma_set = 0, coma_mask = 0, coml_set, coml_mask, clkrc;
568 /* select color matrix configuration for given color encoding */
570 case MEDIA_BUS_FMT_Y8_1X8:
571 dev_dbg(&client->dev, "pixel format GREY8_1X8\n");
572 coma_mask |= COMA_RGB | COMA_WORD_SWAP | COMA_BYTE_SWAP;
575 case MEDIA_BUS_FMT_YUYV8_2X8:
576 dev_dbg(&client->dev, "pixel format YUYV8_2X8_LE\n");
577 coma_mask |= COMA_RGB | COMA_BW | COMA_BYTE_SWAP;
578 coma_set |= COMA_WORD_SWAP;
580 case MEDIA_BUS_FMT_YVYU8_2X8:
581 dev_dbg(&client->dev, "pixel format YVYU8_2X8_LE (untested)\n");
582 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP |
585 case MEDIA_BUS_FMT_UYVY8_2X8:
586 dev_dbg(&client->dev, "pixel format YUYV8_2X8_BE\n");
588 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP;
589 coma_set |= COMA_BYTE_SWAP;
591 coma_mask |= COMA_RGB | COMA_BW;
592 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP;
595 case MEDIA_BUS_FMT_VYUY8_2X8:
596 dev_dbg(&client->dev, "pixel format YVYU8_2X8_BE (untested)\n");
598 coma_mask |= COMA_RGB | COMA_BW;
599 coma_set |= COMA_BYTE_SWAP | COMA_WORD_SWAP;
601 coma_mask |= COMA_RGB | COMA_BW | COMA_WORD_SWAP;
602 coma_set |= COMA_BYTE_SWAP;
605 case MEDIA_BUS_FMT_SBGGR8_1X8:
606 dev_dbg(&client->dev, "pixel format SBGGR8_1X8 (untested)\n");
607 coma_mask |= COMA_BW | COMA_BYTE_SWAP | COMA_WORD_SWAP;
608 coma_set |= COMA_RAW_RGB | COMA_RGB;
611 dev_err(&client->dev, "Pixel format not handled: 0x%x\n", code);
616 if (code == MEDIA_BUS_FMT_Y8_1X8 ||
617 code == MEDIA_BUS_FMT_SBGGR8_1X8) {
618 coml_mask = COML_ONE_CHANNEL;
620 priv->pclk_max = 4000000;
623 coml_set = COML_ONE_CHANNEL;
624 priv->pclk_max = 8000000;
627 if (code == MEDIA_BUS_FMT_SBGGR8_1X8)
628 priv->colorspace = V4L2_COLORSPACE_SRGB;
630 priv->colorspace = V4L2_COLORSPACE_JPEG;
633 dev_dbg(&client->dev, "max resolution: QCIF\n");
634 coma_set |= COMA_QCIF;
637 dev_dbg(&client->dev, "max resolution: CIF\n");
638 coma_mask |= COMA_QCIF;
640 priv->half_scale = half_scale;
643 if (sense->master_clock == 8000000) {
644 dev_dbg(&client->dev, "8MHz input clock\n");
646 } else if (sense->master_clock == 12000000) {
647 dev_dbg(&client->dev, "12MHz input clock\n");
649 } else if (sense->master_clock == 16000000) {
650 dev_dbg(&client->dev, "16MHz input clock\n");
652 } else if (sense->master_clock == 24000000) {
653 dev_dbg(&client->dev, "24MHz input clock\n");
656 dev_err(&client->dev,
657 "unsupported input clock, check platform data\n");
660 mclk = sense->master_clock;
661 priv->pclk_limit = sense->pixel_clock_max;
665 priv->pclk_limit = 0;
666 dev_dbg(&client->dev, "using default 24MHz input clock\n");
669 clkrc |= to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max);
671 pclk = priv->pclk_max / GET_CLKRC_DIV(clkrc);
672 dev_dbg(&client->dev, "pixel clock divider: %ld.%ld\n",
673 mclk / pclk, 10 * mclk % pclk / pclk);
675 ret = ov6650_s_crop(sd, &a);
677 ret = ov6650_reg_rmw(client, REG_COMA, coma_set, coma_mask);
679 ret = ov6650_reg_write(client, REG_CLKRC, clkrc);
681 ret = ov6650_reg_rmw(client, REG_COML, coml_set, coml_mask);
684 mf->colorspace = priv->colorspace;
685 mf->width = priv->rect.width >> half_scale;
686 mf->height = priv->rect.height >> half_scale;
691 static int ov6650_set_fmt(struct v4l2_subdev *sd,
692 struct v4l2_subdev_pad_config *cfg,
693 struct v4l2_subdev_format *format)
695 struct v4l2_mbus_framefmt *mf = &format->format;
696 struct i2c_client *client = v4l2_get_subdevdata(sd);
697 struct ov6650 *priv = to_ov6650(client);
702 if (is_unscaled_ok(mf->width, mf->height, &priv->rect))
703 v4l_bound_align_image(&mf->width, 2, W_CIF, 1,
704 &mf->height, 2, H_CIF, 1, 0);
706 mf->field = V4L2_FIELD_NONE;
709 case MEDIA_BUS_FMT_Y10_1X10:
710 mf->code = MEDIA_BUS_FMT_Y8_1X8;
711 case MEDIA_BUS_FMT_Y8_1X8:
712 case MEDIA_BUS_FMT_YVYU8_2X8:
713 case MEDIA_BUS_FMT_YUYV8_2X8:
714 case MEDIA_BUS_FMT_VYUY8_2X8:
715 case MEDIA_BUS_FMT_UYVY8_2X8:
716 mf->colorspace = V4L2_COLORSPACE_JPEG;
719 mf->code = MEDIA_BUS_FMT_SBGGR8_1X8;
720 case MEDIA_BUS_FMT_SBGGR8_1X8:
721 mf->colorspace = V4L2_COLORSPACE_SRGB;
725 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
726 return ov6650_s_fmt(sd, mf);
732 static int ov6650_enum_mbus_code(struct v4l2_subdev *sd,
733 struct v4l2_subdev_pad_config *cfg,
734 struct v4l2_subdev_mbus_code_enum *code)
736 if (code->pad || code->index >= ARRAY_SIZE(ov6650_codes))
739 code->code = ov6650_codes[code->index];
743 static int ov6650_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
745 struct i2c_client *client = v4l2_get_subdevdata(sd);
746 struct ov6650 *priv = to_ov6650(client);
747 struct v4l2_captureparm *cp = &parms->parm.capture;
749 if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
752 memset(cp, 0, sizeof(*cp));
753 cp->capability = V4L2_CAP_TIMEPERFRAME;
754 cp->timeperframe.numerator = GET_CLKRC_DIV(to_clkrc(&priv->tpf,
755 priv->pclk_limit, priv->pclk_max));
756 cp->timeperframe.denominator = FRAME_RATE_MAX;
758 dev_dbg(&client->dev, "Frame interval: %u/%u s\n",
759 cp->timeperframe.numerator, cp->timeperframe.denominator);
764 static int ov6650_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms)
766 struct i2c_client *client = v4l2_get_subdevdata(sd);
767 struct ov6650 *priv = to_ov6650(client);
768 struct v4l2_captureparm *cp = &parms->parm.capture;
769 struct v4l2_fract *tpf = &cp->timeperframe;
773 if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
776 if (cp->extendedmode != 0)
779 if (tpf->numerator == 0 || tpf->denominator == 0)
780 div = 1; /* Reset to full rate */
782 div = (tpf->numerator * FRAME_RATE_MAX) / tpf->denominator;
786 else if (div > GET_CLKRC_DIV(CLKRC_DIV_MASK))
787 div = GET_CLKRC_DIV(CLKRC_DIV_MASK);
790 * Keep result to be used as tpf limit
791 * for subseqent clock divider calculations
793 priv->tpf.numerator = div;
794 priv->tpf.denominator = FRAME_RATE_MAX;
796 clkrc = to_clkrc(&priv->tpf, priv->pclk_limit, priv->pclk_max);
798 ret = ov6650_reg_rmw(client, REG_CLKRC, clkrc, CLKRC_DIV_MASK);
800 tpf->numerator = GET_CLKRC_DIV(clkrc);
801 tpf->denominator = FRAME_RATE_MAX;
807 /* Soft reset the camera. This has nothing to do with the RESET pin! */
808 static int ov6650_reset(struct i2c_client *client)
812 dev_dbg(&client->dev, "reset\n");
814 ret = ov6650_reg_rmw(client, REG_COMA, COMA_RESET, 0);
816 dev_err(&client->dev,
817 "An error occurred while entering soft reset!\n");
822 /* program default register values */
823 static int ov6650_prog_dflt(struct i2c_client *client)
827 dev_dbg(&client->dev, "initializing\n");
829 ret = ov6650_reg_write(client, REG_COMA, 0); /* ~COMA_RESET */
831 ret = ov6650_reg_rmw(client, REG_COMB, 0, COMB_BAND_FILTER);
836 static int ov6650_video_probe(struct i2c_client *client)
838 struct ov6650 *priv = to_ov6650(client);
839 u8 pidh, pidl, midh, midl;
842 ret = ov6650_s_power(&priv->subdev, 1);
847 * check and show product ID and manufacturer ID
849 ret = ov6650_reg_read(client, REG_PIDH, &pidh);
851 ret = ov6650_reg_read(client, REG_PIDL, &pidl);
853 ret = ov6650_reg_read(client, REG_MIDH, &midh);
855 ret = ov6650_reg_read(client, REG_MIDL, &midl);
860 if ((pidh != OV6650_PIDH) || (pidl != OV6650_PIDL)) {
861 dev_err(&client->dev, "Product ID error 0x%02x:0x%02x\n",
867 dev_info(&client->dev,
868 "ov6650 Product ID 0x%02x:0x%02x Manufacturer ID 0x%02x:0x%02x\n",
869 pidh, pidl, midh, midl);
871 ret = ov6650_reset(client);
873 ret = ov6650_prog_dflt(client);
875 ret = v4l2_ctrl_handler_setup(&priv->hdl);
878 ov6650_s_power(&priv->subdev, 0);
882 static const struct v4l2_ctrl_ops ov6550_ctrl_ops = {
883 .g_volatile_ctrl = ov6550_g_volatile_ctrl,
884 .s_ctrl = ov6550_s_ctrl,
887 static struct v4l2_subdev_core_ops ov6650_core_ops = {
888 #ifdef CONFIG_VIDEO_ADV_DEBUG
889 .g_register = ov6650_get_register,
890 .s_register = ov6650_set_register,
892 .s_power = ov6650_s_power,
895 /* Request bus settings on camera side */
896 static int ov6650_g_mbus_config(struct v4l2_subdev *sd,
897 struct v4l2_mbus_config *cfg)
899 struct i2c_client *client = v4l2_get_subdevdata(sd);
900 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
902 cfg->flags = V4L2_MBUS_MASTER |
903 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING |
904 V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
905 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
906 V4L2_MBUS_DATA_ACTIVE_HIGH;
907 cfg->type = V4L2_MBUS_PARALLEL;
908 cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
913 /* Alter bus settings on camera side */
914 static int ov6650_s_mbus_config(struct v4l2_subdev *sd,
915 const struct v4l2_mbus_config *cfg)
917 struct i2c_client *client = v4l2_get_subdevdata(sd);
918 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
919 unsigned long flags = soc_camera_apply_board_flags(ssdd, cfg);
922 if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
923 ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_PCLK_RISING, 0);
925 ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_PCLK_RISING);
929 if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
930 ret = ov6650_reg_rmw(client, REG_COMF, COMF_HREF_LOW, 0);
932 ret = ov6650_reg_rmw(client, REG_COMF, 0, COMF_HREF_LOW);
936 if (flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH)
937 ret = ov6650_reg_rmw(client, REG_COMJ, COMJ_VSYNC_HIGH, 0);
939 ret = ov6650_reg_rmw(client, REG_COMJ, 0, COMJ_VSYNC_HIGH);
944 static struct v4l2_subdev_video_ops ov6650_video_ops = {
945 .s_stream = ov6650_s_stream,
946 .cropcap = ov6650_cropcap,
947 .g_crop = ov6650_g_crop,
948 .s_crop = ov6650_s_crop,
949 .g_parm = ov6650_g_parm,
950 .s_parm = ov6650_s_parm,
951 .g_mbus_config = ov6650_g_mbus_config,
952 .s_mbus_config = ov6650_s_mbus_config,
955 static const struct v4l2_subdev_pad_ops ov6650_pad_ops = {
956 .enum_mbus_code = ov6650_enum_mbus_code,
957 .get_fmt = ov6650_get_fmt,
958 .set_fmt = ov6650_set_fmt,
961 static struct v4l2_subdev_ops ov6650_subdev_ops = {
962 .core = &ov6650_core_ops,
963 .video = &ov6650_video_ops,
964 .pad = &ov6650_pad_ops,
968 * i2c_driver function
970 static int ov6650_probe(struct i2c_client *client,
971 const struct i2c_device_id *did)
974 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
978 dev_err(&client->dev, "Missing platform_data for driver\n");
982 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
984 dev_err(&client->dev,
985 "Failed to allocate memory for private data!\n");
989 v4l2_i2c_subdev_init(&priv->subdev, client, &ov6650_subdev_ops);
990 v4l2_ctrl_handler_init(&priv->hdl, 13);
991 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
992 V4L2_CID_VFLIP, 0, 1, 1, 0);
993 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
994 V4L2_CID_HFLIP, 0, 1, 1, 0);
995 priv->autogain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
996 V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
997 priv->gain = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
998 V4L2_CID_GAIN, 0, 0x3f, 1, DEF_GAIN);
999 priv->autowb = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1000 V4L2_CID_AUTO_WHITE_BALANCE, 0, 1, 1, 1);
1001 priv->blue = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1002 V4L2_CID_BLUE_BALANCE, 0, 0xff, 1, DEF_BLUE);
1003 priv->red = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1004 V4L2_CID_RED_BALANCE, 0, 0xff, 1, DEF_RED);
1005 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1006 V4L2_CID_SATURATION, 0, 0xf, 1, 0x8);
1007 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1008 V4L2_CID_HUE, 0, HUE_MASK, 1, DEF_HUE);
1009 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1010 V4L2_CID_BRIGHTNESS, 0, 0xff, 1, 0x80);
1011 priv->autoexposure = v4l2_ctrl_new_std_menu(&priv->hdl,
1012 &ov6550_ctrl_ops, V4L2_CID_EXPOSURE_AUTO,
1013 V4L2_EXPOSURE_MANUAL, 0, V4L2_EXPOSURE_AUTO);
1014 priv->exposure = v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1015 V4L2_CID_EXPOSURE, 0, 0xff, 1, DEF_AECH);
1016 v4l2_ctrl_new_std(&priv->hdl, &ov6550_ctrl_ops,
1017 V4L2_CID_GAMMA, 0, 0xff, 1, 0x12);
1019 priv->subdev.ctrl_handler = &priv->hdl;
1020 if (priv->hdl.error)
1021 return priv->hdl.error;
1023 v4l2_ctrl_auto_cluster(2, &priv->autogain, 0, true);
1024 v4l2_ctrl_auto_cluster(3, &priv->autowb, 0, true);
1025 v4l2_ctrl_auto_cluster(2, &priv->autoexposure,
1026 V4L2_EXPOSURE_MANUAL, true);
1028 priv->rect.left = DEF_HSTRT << 1;
1029 priv->rect.top = DEF_VSTRT << 1;
1030 priv->rect.width = W_CIF;
1031 priv->rect.height = H_CIF;
1032 priv->half_scale = false;
1033 priv->code = MEDIA_BUS_FMT_YUYV8_2X8;
1034 priv->colorspace = V4L2_COLORSPACE_JPEG;
1036 priv->clk = v4l2_clk_get(&client->dev, "mclk");
1037 if (IS_ERR(priv->clk)) {
1038 ret = PTR_ERR(priv->clk);
1042 ret = ov6650_video_probe(client);
1044 v4l2_clk_put(priv->clk);
1046 v4l2_ctrl_handler_free(&priv->hdl);
1052 static int ov6650_remove(struct i2c_client *client)
1054 struct ov6650 *priv = to_ov6650(client);
1056 v4l2_clk_put(priv->clk);
1057 v4l2_device_unregister_subdev(&priv->subdev);
1058 v4l2_ctrl_handler_free(&priv->hdl);
1062 static const struct i2c_device_id ov6650_id[] = {
1066 MODULE_DEVICE_TABLE(i2c, ov6650_id);
1068 static struct i2c_driver ov6650_i2c_driver = {
1072 .probe = ov6650_probe,
1073 .remove = ov6650_remove,
1074 .id_table = ov6650_id,
1077 module_i2c_driver(ov6650_i2c_driver);
1079 MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV6650");
1080 MODULE_AUTHOR("Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>");
1081 MODULE_LICENSE("GPL v2");