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1// SPDX-License-Identifier: GPL-2.02/*3 * OmniVision OV96xx Camera Driver4 *5 * Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com>6 *7 * Based on ov772x camera driver:8 *9 * Copyright (C) 2008 Renesas Solutions Corp.10 * Kuninori Morimoto <morimoto.kuninori@renesas.com>11 *12 * Based on ov7670 and soc_camera_platform driver,13 * transition from soc_camera to pxa_camera based on mt9m11114 *15 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>16 * Copyright (C) 2008 Magnus Damm17 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>18 */19 20#include <linux/clk.h>21#include <linux/init.h>22#include <linux/module.h>23#include <linux/i2c.h>24#include <linux/slab.h>25#include <linux/delay.h>26#include <linux/v4l2-mediabus.h>27#include <linux/videodev2.h>28 29#include <media/v4l2-async.h>30#include <media/v4l2-common.h>31#include <media/v4l2-ctrls.h>32#include <media/v4l2-device.h>33#include <media/v4l2-event.h>34 35#include <linux/gpio/consumer.h>36 37#include "ov9640.h"38 39#define to_ov9640_sensor(sd)	container_of(sd, struct ov9640_priv, subdev)40 41/* default register setup */42static const struct ov9640_reg ov9640_regs_dflt[] = {43	{ OV9640_COM5,	OV9640_COM5_SYSCLK | OV9640_COM5_LONGEXP },44	{ OV9640_COM6,	OV9640_COM6_OPT_BLC | OV9640_COM6_ADBLC_BIAS |45			OV9640_COM6_FMT_RST | OV9640_COM6_ADBLC_OPTEN },46	{ OV9640_PSHFT,	OV9640_PSHFT_VAL(0x01) },47	{ OV9640_ACOM,	OV9640_ACOM_2X_ANALOG | OV9640_ACOM_RSVD },48	{ OV9640_TSLB,	OV9640_TSLB_YUYV_UYVY },49	{ OV9640_COM16,	OV9640_COM16_RB_AVG },50 51	/* Gamma curve P */52	{ 0x6c, 0x40 },	{ 0x6d, 0x30 },	{ 0x6e, 0x4b },	{ 0x6f, 0x60 },53	{ 0x70, 0x70 },	{ 0x71, 0x70 },	{ 0x72, 0x70 },	{ 0x73, 0x70 },54	{ 0x74, 0x60 },	{ 0x75, 0x60 },	{ 0x76, 0x50 },	{ 0x77, 0x48 },55	{ 0x78, 0x3a },	{ 0x79, 0x2e },	{ 0x7a, 0x28 },	{ 0x7b, 0x22 },56 57	/* Gamma curve T */58	{ 0x7c, 0x04 },	{ 0x7d, 0x07 },	{ 0x7e, 0x10 },	{ 0x7f, 0x28 },59	{ 0x80, 0x36 },	{ 0x81, 0x44 },	{ 0x82, 0x52 },	{ 0x83, 0x60 },60	{ 0x84, 0x6c },	{ 0x85, 0x78 },	{ 0x86, 0x8c },	{ 0x87, 0x9e },61	{ 0x88, 0xbb },	{ 0x89, 0xd2 },	{ 0x8a, 0xe6 },62};63 64/* Configurations65 * NOTE: for YUV, alter the following registers:66 *		COM12 |= OV9640_COM12_YUV_AVG67 *68 *	 for RGB, alter the following registers:69 *		COM7  |= OV9640_COM7_RGB70 *		COM13 |= OV9640_COM13_RGB_AVG71 *		COM15 |= proper RGB color encoding mode72 */73static const struct ov9640_reg ov9640_regs_qqcif[] = {74	{ OV9640_CLKRC,	OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x0f) },75	{ OV9640_COM1,	OV9640_COM1_QQFMT | OV9640_COM1_HREF_2SKIP },76	{ OV9640_COM4,	OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },77	{ OV9640_COM7,	OV9640_COM7_QCIF },78	{ OV9640_COM12,	OV9640_COM12_RSVD },79	{ OV9640_COM13,	OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },80	{ OV9640_COM15,	OV9640_COM15_OR_10F0 },81};82 83static const struct ov9640_reg ov9640_regs_qqvga[] = {84	{ OV9640_CLKRC,	OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x07) },85	{ OV9640_COM1,	OV9640_COM1_QQFMT | OV9640_COM1_HREF_2SKIP },86	{ OV9640_COM4,	OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },87	{ OV9640_COM7,	OV9640_COM7_QVGA },88	{ OV9640_COM12,	OV9640_COM12_RSVD },89	{ OV9640_COM13,	OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },90	{ OV9640_COM15,	OV9640_COM15_OR_10F0 },91};92 93static const struct ov9640_reg ov9640_regs_qcif[] = {94	{ OV9640_CLKRC,	OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x07) },95	{ OV9640_COM4,	OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },96	{ OV9640_COM7,	OV9640_COM7_QCIF },97	{ OV9640_COM12,	OV9640_COM12_RSVD },98	{ OV9640_COM13,	OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },99	{ OV9640_COM15,	OV9640_COM15_OR_10F0 },100};101 102static const struct ov9640_reg ov9640_regs_qvga[] = {103	{ OV9640_CLKRC,	OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x03) },104	{ OV9640_COM4,	OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },105	{ OV9640_COM7,	OV9640_COM7_QVGA },106	{ OV9640_COM12,	OV9640_COM12_RSVD },107	{ OV9640_COM13,	OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },108	{ OV9640_COM15,	OV9640_COM15_OR_10F0 },109};110 111static const struct ov9640_reg ov9640_regs_cif[] = {112	{ OV9640_CLKRC,	OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x03) },113	{ OV9640_COM3,	OV9640_COM3_VP },114	{ OV9640_COM7,	OV9640_COM7_CIF },115	{ OV9640_COM12,	OV9640_COM12_RSVD },116	{ OV9640_COM13,	OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },117	{ OV9640_COM15,	OV9640_COM15_OR_10F0 },118};119 120static const struct ov9640_reg ov9640_regs_vga[] = {121	{ OV9640_CLKRC,	OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x01) },122	{ OV9640_COM3,	OV9640_COM3_VP },123	{ OV9640_COM7,	OV9640_COM7_VGA },124	{ OV9640_COM12,	OV9640_COM12_RSVD },125	{ OV9640_COM13,	OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },126	{ OV9640_COM15,	OV9640_COM15_OR_10F0 },127};128 129static const struct ov9640_reg ov9640_regs_sxga[] = {130	{ OV9640_CLKRC,	OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x01) },131	{ OV9640_COM3,	OV9640_COM3_VP },132	{ OV9640_COM7,	0 },133	{ OV9640_COM12,	OV9640_COM12_RSVD },134	{ OV9640_COM13,	OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },135	{ OV9640_COM15,	OV9640_COM15_OR_10F0 },136};137 138static const struct ov9640_reg ov9640_regs_yuv[] = {139	{ OV9640_MTX1,	0x58 },140	{ OV9640_MTX2,	0x48 },141	{ OV9640_MTX3,	0x10 },142	{ OV9640_MTX4,	0x28 },143	{ OV9640_MTX5,	0x48 },144	{ OV9640_MTX6,	0x70 },145	{ OV9640_MTX7,	0x40 },146	{ OV9640_MTX8,	0x40 },147	{ OV9640_MTX9,	0x40 },148	{ OV9640_MTXS,	0x0f },149};150 151static const struct ov9640_reg ov9640_regs_rgb[] = {152	{ OV9640_MTX1,	0x71 },153	{ OV9640_MTX2,	0x3e },154	{ OV9640_MTX3,	0x0c },155	{ OV9640_MTX4,	0x33 },156	{ OV9640_MTX5,	0x72 },157	{ OV9640_MTX6,	0x00 },158	{ OV9640_MTX7,	0x2b },159	{ OV9640_MTX8,	0x66 },160	{ OV9640_MTX9,	0xd2 },161	{ OV9640_MTXS,	0x65 },162};163 164static const u32 ov9640_codes[] = {165	MEDIA_BUS_FMT_UYVY8_2X8,166	MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE,167	MEDIA_BUS_FMT_RGB565_2X8_LE,168};169 170/* read a register */171static int ov9640_reg_read(struct i2c_client *client, u8 reg, u8 *val)172{173	int ret;174	u8 data = reg;175	struct i2c_msg msg = {176		.addr	= client->addr,177		.flags	= 0,178		.len	= 1,179		.buf	= &data,180	};181 182	ret = i2c_transfer(client->adapter, &msg, 1);183	if (ret < 0)184		goto err;185 186	msg.flags = I2C_M_RD;187	ret = i2c_transfer(client->adapter, &msg, 1);188	if (ret < 0)189		goto err;190 191	*val = data;192	return 0;193 194err:195	dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg);196	return ret;197}198 199/* write a register */200static int ov9640_reg_write(struct i2c_client *client, u8 reg, u8 val)201{202	int ret;203	u8 _val;204	unsigned char data[2] = { reg, val };205	struct i2c_msg msg = {206		.addr	= client->addr,207		.flags	= 0,208		.len	= 2,209		.buf	= data,210	};211 212	ret = i2c_transfer(client->adapter, &msg, 1);213	if (ret < 0) {214		dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg);215		return ret;216	}217 218	/* we have to read the register back ... no idea why, maybe HW bug */219	ret = ov9640_reg_read(client, reg, &_val);220	if (ret)221		dev_err(&client->dev,222			"Failed reading back register 0x%02x!\n", reg);223 224	return 0;225}226 227 228/* Read a register, alter its bits, write it back */229static int ov9640_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 unset)230{231	u8 val;232	int ret;233 234	ret = ov9640_reg_read(client, reg, &val);235	if (ret) {236		dev_err(&client->dev,237			"[Read]-Modify-Write of register %02x failed!\n", reg);238		return ret;239	}240 241	val |= set;242	val &= ~unset;243 244	ret = ov9640_reg_write(client, reg, val);245	if (ret)246		dev_err(&client->dev,247			"Read-Modify-[Write] of register %02x failed!\n", reg);248 249	return ret;250}251 252/* Soft reset the camera. This has nothing to do with the RESET pin! */253static int ov9640_reset(struct i2c_client *client)254{255	int ret;256 257	ret = ov9640_reg_write(client, OV9640_COM7, OV9640_COM7_SCCB_RESET);258	if (ret)259		dev_err(&client->dev,260			"An error occurred while entering soft reset!\n");261 262	return ret;263}264 265/* Start/Stop streaming from the device */266static int ov9640_s_stream(struct v4l2_subdev *sd, int enable)267{268	return 0;269}270 271/* Set status of additional camera capabilities */272static int ov9640_s_ctrl(struct v4l2_ctrl *ctrl)273{274	struct ov9640_priv *priv = container_of(ctrl->handler,275						struct ov9640_priv, hdl);276	struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);277 278	switch (ctrl->id) {279	case V4L2_CID_VFLIP:280		if (ctrl->val)281			return ov9640_reg_rmw(client, OV9640_MVFP,282					      OV9640_MVFP_V, 0);283		return ov9640_reg_rmw(client, OV9640_MVFP, 0, OV9640_MVFP_V);284	case V4L2_CID_HFLIP:285		if (ctrl->val)286			return ov9640_reg_rmw(client, OV9640_MVFP,287					      OV9640_MVFP_H, 0);288		return ov9640_reg_rmw(client, OV9640_MVFP, 0, OV9640_MVFP_H);289	}290 291	return -EINVAL;292}293 294#ifdef CONFIG_VIDEO_ADV_DEBUG295static int ov9640_get_register(struct v4l2_subdev *sd,296				struct v4l2_dbg_register *reg)297{298	struct i2c_client *client = v4l2_get_subdevdata(sd);299	int ret;300	u8 val;301 302	if (reg->reg & ~0xff)303		return -EINVAL;304 305	reg->size = 1;306 307	ret = ov9640_reg_read(client, reg->reg, &val);308	if (ret)309		return ret;310 311	reg->val = (__u64)val;312 313	return 0;314}315 316static int ov9640_set_register(struct v4l2_subdev *sd,317				const struct v4l2_dbg_register *reg)318{319	struct i2c_client *client = v4l2_get_subdevdata(sd);320 321	if (reg->reg & ~0xff || reg->val & ~0xff)322		return -EINVAL;323 324	return ov9640_reg_write(client, reg->reg, reg->val);325}326#endif327 328static int ov9640_s_power(struct v4l2_subdev *sd, int on)329{330	struct ov9640_priv *priv = to_ov9640_sensor(sd);331	int ret = 0;332 333	if (on) {334		gpiod_set_value(priv->gpio_power, 1);335		usleep_range(1000, 2000);336		ret = clk_prepare_enable(priv->clk);337		usleep_range(1000, 2000);338		gpiod_set_value(priv->gpio_reset, 0);339	} else {340		gpiod_set_value(priv->gpio_reset, 1);341		usleep_range(1000, 2000);342		clk_disable_unprepare(priv->clk);343		usleep_range(1000, 2000);344		gpiod_set_value(priv->gpio_power, 0);345	}346 347	return ret;348}349 350/* select nearest higher resolution for capture */351static void ov9640_res_roundup(u32 *width, u32 *height)352{353	unsigned int i;354	enum { QQCIF, QQVGA, QCIF, QVGA, CIF, VGA, SXGA };355	static const u32 res_x[] = { 88, 160, 176, 320, 352, 640, 1280 };356	static const u32 res_y[] = { 72, 120, 144, 240, 288, 480, 960 };357 358	for (i = 0; i < ARRAY_SIZE(res_x); i++) {359		if (res_x[i] >= *width && res_y[i] >= *height) {360			*width = res_x[i];361			*height = res_y[i];362			return;363		}364	}365 366	*width = res_x[SXGA];367	*height = res_y[SXGA];368}369 370/* Prepare necessary register changes depending on color encoding */371static void ov9640_alter_regs(u32 code,372			      struct ov9640_reg_alt *alt)373{374	switch (code) {375	default:376	case MEDIA_BUS_FMT_UYVY8_2X8:377		alt->com12	= OV9640_COM12_YUV_AVG;378		alt->com13	= OV9640_COM13_Y_DELAY_EN |379					OV9640_COM13_YUV_DLY(0x01);380		break;381	case MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE:382		alt->com7	= OV9640_COM7_RGB;383		alt->com13	= OV9640_COM13_RGB_AVG;384		alt->com15	= OV9640_COM15_RGB_555;385		break;386	case MEDIA_BUS_FMT_RGB565_2X8_LE:387		alt->com7	= OV9640_COM7_RGB;388		alt->com13	= OV9640_COM13_RGB_AVG;389		alt->com15	= OV9640_COM15_RGB_565;390		break;391	}392}393 394/* Setup registers according to resolution and color encoding */395static int ov9640_write_regs(struct i2c_client *client, u32 width,396		u32 code, struct ov9640_reg_alt *alts)397{398	const struct ov9640_reg	*ov9640_regs, *matrix_regs;399	unsigned int		ov9640_regs_len, matrix_regs_len;400	unsigned int		i;401	int			ret;402	u8			val;403 404	/* select register configuration for given resolution */405	switch (width) {406	case W_QQCIF:407		ov9640_regs	= ov9640_regs_qqcif;408		ov9640_regs_len	= ARRAY_SIZE(ov9640_regs_qqcif);409		break;410	case W_QQVGA:411		ov9640_regs	= ov9640_regs_qqvga;412		ov9640_regs_len	= ARRAY_SIZE(ov9640_regs_qqvga);413		break;414	case W_QCIF:415		ov9640_regs	= ov9640_regs_qcif;416		ov9640_regs_len	= ARRAY_SIZE(ov9640_regs_qcif);417		break;418	case W_QVGA:419		ov9640_regs	= ov9640_regs_qvga;420		ov9640_regs_len	= ARRAY_SIZE(ov9640_regs_qvga);421		break;422	case W_CIF:423		ov9640_regs	= ov9640_regs_cif;424		ov9640_regs_len	= ARRAY_SIZE(ov9640_regs_cif);425		break;426	case W_VGA:427		ov9640_regs	= ov9640_regs_vga;428		ov9640_regs_len	= ARRAY_SIZE(ov9640_regs_vga);429		break;430	case W_SXGA:431		ov9640_regs	= ov9640_regs_sxga;432		ov9640_regs_len	= ARRAY_SIZE(ov9640_regs_sxga);433		break;434	default:435		dev_err(&client->dev, "Failed to select resolution!\n");436		return -EINVAL;437	}438 439	/* select color matrix configuration for given color encoding */440	if (code == MEDIA_BUS_FMT_UYVY8_2X8) {441		matrix_regs	= ov9640_regs_yuv;442		matrix_regs_len	= ARRAY_SIZE(ov9640_regs_yuv);443	} else {444		matrix_regs	= ov9640_regs_rgb;445		matrix_regs_len	= ARRAY_SIZE(ov9640_regs_rgb);446	}447 448	/* write register settings into the module */449	for (i = 0; i < ov9640_regs_len; i++) {450		val = ov9640_regs[i].val;451 452		switch (ov9640_regs[i].reg) {453		case OV9640_COM7:454			val |= alts->com7;455			break;456		case OV9640_COM12:457			val |= alts->com12;458			break;459		case OV9640_COM13:460			val |= alts->com13;461			break;462		case OV9640_COM15:463			val |= alts->com15;464			break;465		}466 467		ret = ov9640_reg_write(client, ov9640_regs[i].reg, val);468		if (ret)469			return ret;470	}471 472	/* write color matrix configuration into the module */473	for (i = 0; i < matrix_regs_len; i++) {474		ret = ov9640_reg_write(client, matrix_regs[i].reg,475				       matrix_regs[i].val);476		if (ret)477			return ret;478	}479 480	return 0;481}482 483/* program default register values */484static int ov9640_prog_dflt(struct i2c_client *client)485{486	unsigned int i;487	int ret;488 489	for (i = 0; i < ARRAY_SIZE(ov9640_regs_dflt); i++) {490		ret = ov9640_reg_write(client, ov9640_regs_dflt[i].reg,491				       ov9640_regs_dflt[i].val);492		if (ret)493			return ret;494	}495 496	/* wait for the changes to actually happen, 140ms are not enough yet */497	msleep(150);498 499	return 0;500}501 502/* set the format we will capture in */503static int ov9640_s_fmt(struct v4l2_subdev *sd,504			struct v4l2_mbus_framefmt *mf)505{506	struct i2c_client *client = v4l2_get_subdevdata(sd);507	struct ov9640_reg_alt alts = {0};508	int ret;509 510	ov9640_alter_regs(mf->code, &alts);511 512	ov9640_reset(client);513 514	ret = ov9640_prog_dflt(client);515	if (ret)516		return ret;517 518	return ov9640_write_regs(client, mf->width, mf->code, &alts);519}520 521static int ov9640_set_fmt(struct v4l2_subdev *sd,522		struct v4l2_subdev_state *sd_state,523		struct v4l2_subdev_format *format)524{525	struct v4l2_mbus_framefmt *mf = &format->format;526 527	if (format->pad)528		return -EINVAL;529 530	ov9640_res_roundup(&mf->width, &mf->height);531 532	mf->field = V4L2_FIELD_NONE;533 534	switch (mf->code) {535	case MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE:536	case MEDIA_BUS_FMT_RGB565_2X8_LE:537		mf->colorspace = V4L2_COLORSPACE_SRGB;538		break;539	default:540		mf->code = MEDIA_BUS_FMT_UYVY8_2X8;541		fallthrough;542	case MEDIA_BUS_FMT_UYVY8_2X8:543		mf->colorspace = V4L2_COLORSPACE_JPEG;544		break;545	}546 547	if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)548		return ov9640_s_fmt(sd, mf);549 550	return 0;551}552 553static int ov9640_enum_mbus_code(struct v4l2_subdev *sd,554		struct v4l2_subdev_state *sd_state,555		struct v4l2_subdev_mbus_code_enum *code)556{557	if (code->pad || code->index >= ARRAY_SIZE(ov9640_codes))558		return -EINVAL;559 560	code->code = ov9640_codes[code->index];561 562	return 0;563}564 565static int ov9640_get_selection(struct v4l2_subdev *sd,566		struct v4l2_subdev_state *sd_state,567		struct v4l2_subdev_selection *sel)568{569	if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)570		return -EINVAL;571 572	sel->r.left = 0;573	sel->r.top = 0;574	switch (sel->target) {575	case V4L2_SEL_TGT_CROP_BOUNDS:576	case V4L2_SEL_TGT_CROP:577		sel->r.width = W_SXGA;578		sel->r.height = H_SXGA;579		return 0;580	default:581		return -EINVAL;582	}583}584 585static int ov9640_video_probe(struct i2c_client *client)586{587	struct v4l2_subdev *sd = i2c_get_clientdata(client);588	struct ov9640_priv *priv = to_ov9640_sensor(sd);589	u8		pid, ver, midh, midl;590	const char	*devname;591	int		ret;592 593	ret = ov9640_s_power(&priv->subdev, 1);594	if (ret < 0)595		return ret;596 597	/*598	 * check and show product ID and manufacturer ID599	 */600 601	ret = ov9640_reg_read(client, OV9640_PID, &pid);602	if (!ret)603		ret = ov9640_reg_read(client, OV9640_VER, &ver);604	if (!ret)605		ret = ov9640_reg_read(client, OV9640_MIDH, &midh);606	if (!ret)607		ret = ov9640_reg_read(client, OV9640_MIDL, &midl);608	if (ret)609		goto done;610 611	switch (VERSION(pid, ver)) {612	case OV9640_V2:613		devname		= "ov9640";614		priv->revision	= 2;615		break;616	case OV9640_V3:617		devname		= "ov9640";618		priv->revision	= 3;619		break;620	default:621		dev_err(&client->dev, "Product ID error %x:%x\n", pid, ver);622		ret = -ENODEV;623		goto done;624	}625 626	dev_info(&client->dev, "%s Product ID %0x:%0x Manufacturer ID %x:%x\n",627		 devname, pid, ver, midh, midl);628 629	ret = v4l2_ctrl_handler_setup(&priv->hdl);630 631done:632	ov9640_s_power(&priv->subdev, 0);633	return ret;634}635 636static const struct v4l2_ctrl_ops ov9640_ctrl_ops = {637	.s_ctrl = ov9640_s_ctrl,638};639 640static const struct v4l2_subdev_core_ops ov9640_core_ops = {641#ifdef CONFIG_VIDEO_ADV_DEBUG642	.g_register		= ov9640_get_register,643	.s_register		= ov9640_set_register,644#endif645	.s_power		= ov9640_s_power,646};647 648/* Request bus settings on camera side */649static int ov9640_get_mbus_config(struct v4l2_subdev *sd,650				  unsigned int pad,651				  struct v4l2_mbus_config *cfg)652{653	cfg->type = V4L2_MBUS_PARALLEL;654	cfg->bus.parallel.flags = V4L2_MBUS_PCLK_SAMPLE_RISING |655				  V4L2_MBUS_MASTER |656				  V4L2_MBUS_VSYNC_ACTIVE_HIGH |657				  V4L2_MBUS_HSYNC_ACTIVE_HIGH |658				  V4L2_MBUS_DATA_ACTIVE_HIGH;659 660	return 0;661}662 663static const struct v4l2_subdev_video_ops ov9640_video_ops = {664	.s_stream	= ov9640_s_stream,665};666 667static const struct v4l2_subdev_pad_ops ov9640_pad_ops = {668	.enum_mbus_code = ov9640_enum_mbus_code,669	.get_selection	= ov9640_get_selection,670	.set_fmt	= ov9640_set_fmt,671	.get_mbus_config = ov9640_get_mbus_config,672};673 674static const struct v4l2_subdev_ops ov9640_subdev_ops = {675	.core	= &ov9640_core_ops,676	.video	= &ov9640_video_ops,677	.pad	= &ov9640_pad_ops,678};679 680/*681 * i2c_driver function682 */683static int ov9640_probe(struct i2c_client *client)684{685	struct ov9640_priv *priv;686	int ret;687 688	priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);689	if (!priv)690		return -ENOMEM;691 692	priv->gpio_power = devm_gpiod_get(&client->dev, "Camera power",693					  GPIOD_OUT_LOW);694	if (IS_ERR(priv->gpio_power)) {695		ret = PTR_ERR(priv->gpio_power);696		return ret;697	}698 699	priv->gpio_reset = devm_gpiod_get(&client->dev, "Camera reset",700					  GPIOD_OUT_HIGH);701	if (IS_ERR(priv->gpio_reset)) {702		ret = PTR_ERR(priv->gpio_reset);703		return ret;704	}705 706	v4l2_i2c_subdev_init(&priv->subdev, client, &ov9640_subdev_ops);707 708	v4l2_ctrl_handler_init(&priv->hdl, 2);709	v4l2_ctrl_new_std(&priv->hdl, &ov9640_ctrl_ops,710			  V4L2_CID_VFLIP, 0, 1, 1, 0);711	v4l2_ctrl_new_std(&priv->hdl, &ov9640_ctrl_ops,712			  V4L2_CID_HFLIP, 0, 1, 1, 0);713 714	if (priv->hdl.error) {715		ret = priv->hdl.error;716		goto ectrlinit;717	}718 719	priv->subdev.ctrl_handler = &priv->hdl;720 721	priv->clk = devm_clk_get(&client->dev, "mclk");722	if (IS_ERR(priv->clk)) {723		ret = PTR_ERR(priv->clk);724		goto ectrlinit;725	}726 727	ret = ov9640_video_probe(client);728	if (ret)729		goto ectrlinit;730 731	priv->subdev.dev = &client->dev;732	ret = v4l2_async_register_subdev(&priv->subdev);733	if (ret)734		goto ectrlinit;735 736	return 0;737 738ectrlinit:739	v4l2_ctrl_handler_free(&priv->hdl);740 741	return ret;742}743 744static void ov9640_remove(struct i2c_client *client)745{746	struct v4l2_subdev *sd = i2c_get_clientdata(client);747	struct ov9640_priv *priv = to_ov9640_sensor(sd);748 749	v4l2_async_unregister_subdev(&priv->subdev);750	v4l2_ctrl_handler_free(&priv->hdl);751}752 753static const struct i2c_device_id ov9640_id[] = {754	{ "ov9640" },755	{ }756};757MODULE_DEVICE_TABLE(i2c, ov9640_id);758 759static struct i2c_driver ov9640_i2c_driver = {760	.driver = {761		.name = "ov9640",762	},763	.probe    = ov9640_probe,764	.remove   = ov9640_remove,765	.id_table = ov9640_id,766};767 768module_i2c_driver(ov9640_i2c_driver);769 770MODULE_DESCRIPTION("OmniVision OV96xx CMOS Image Sensor driver");771MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");772MODULE_LICENSE("GPL v2");773