From patchwork Mon Dec 5 17:36:34 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramiro Oliveira X-Patchwork-Id: 9461245 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id D9CA260459 for ; Mon, 5 Dec 2016 17:37:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C2ACE27B2F for ; Mon, 5 Dec 2016 17:37:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B58E627E78; Mon, 5 Dec 2016 17:37:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8D01127B2F for ; Mon, 5 Dec 2016 17:37:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752219AbcLERhK (ORCPT ); Mon, 5 Dec 2016 12:37:10 -0500 Received: from smtprelay.synopsys.com ([198.182.47.9]:36116 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752152AbcLERhH (ORCPT ); Mon, 5 Dec 2016 12:37:07 -0500 Received: from mailhost.synopsys.com (mailhost1.synopsys.com [10.12.238.239]) by smtprelay.synopsys.com (Postfix) with ESMTP id 863B724E07B5; Mon, 5 Dec 2016 09:37:06 -0800 (PST) Received: from mailhost.synopsys.com (localhost [127.0.0.1]) by mailhost.synopsys.com (Postfix) with ESMTP id 55E2859F; Mon, 5 Dec 2016 09:37:06 -0800 (PST) Received: from arc-dev.internal.synopsys.com (roliveir-e7470.internal.synopsys.com [10.107.25.125]) by mailhost.synopsys.com (Postfix) with ESMTP id 18A92575; Mon, 5 Dec 2016 09:37:01 -0800 (PST) From: Ramiro Oliveira To: mchehab@kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, robh+dt@kernel.org, devicetree@vger.kernel.org Cc: davem@davemloft.net, gregkh@linuxfoundation.org, geert+renesas@glider.be, akpm@linux-foundation.org, linux@roeck-us.net, hverkuil@xs4all.nl, dheitmueller@kernellabs.com, slongerbeam@gmail.com, lars@metafoo.de, robert.jarzmik@free.fr, pavel@ucw.cz, pali.rohar@gmail.com, sakari.ailus@linux.intel.com, mark.rutland@arm.com, Ramiro.Oliveira@synopsys.com, CARLOS.PALMINHA@synopsys.com Subject: [PATCH v5 2/2] Add support for OV5647 sensor Date: Mon, 5 Dec 2016 17:36:34 +0000 Message-Id: <3e6262362f9961d2cf861353f32dbcd5bcc5a879.1480958609.git.roliveir@synopsys.com> X-Mailer: git-send-email 2.10.2 In-Reply-To: References: In-Reply-To: References: Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add support for OV5647 sensor. Modes supported: - 640x480 RAW 8 Signed-off-by: Ramiro Oliveira --- MAINTAINERS | 7 + drivers/media/i2c/Kconfig | 12 + drivers/media/i2c/Makefile | 1 + drivers/media/i2c/ov5647.c | 866 +++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 886 insertions(+) create mode 100644 drivers/media/i2c/ov5647.c diff --git a/MAINTAINERS b/MAINTAINERS index 52cc077..72e828a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8923,6 +8923,13 @@ M: Harald Welte S: Maintained F: drivers/char/pcmcia/cm4040_cs.* +OMNIVISION OV5647 SENSOR DRIVER +M: Ramiro Oliveira +L: linux-media@vger.kernel.org +T: git git://linuxtv.org/media_tree.git +S: Maintained +F: drivers/media/i2c/ov5647.c + OMNIVISION OV7670 SENSOR DRIVER M: Jonathan Corbet L: linux-media@vger.kernel.org diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index b31fa6f..c1b78e5 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -531,6 +531,18 @@ config VIDEO_OV2659 To compile this driver as a module, choose M here: the module will be called ov2659. +config VIDEO_OV5647 + tristate "OmniVision OV5647 sensor support" + depends on OF + depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API + depends on MEDIA_CAMERA_SUPPORT + ---help--- + This is a Video4Linux2 sensor-level driver for the OmniVision + OV5647 camera. + + To compile this driver as a module, choose M here: the + module will be called ov5647. + config VIDEO_OV7640 tristate "OmniVision OV7640 sensor support" depends on I2C && VIDEO_V4L2 diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile index 92773b2..0d9014c 100644 --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -82,3 +82,4 @@ obj-$(CONFIG_VIDEO_IR_I2C) += ir-kbd-i2c.o obj-$(CONFIG_VIDEO_ML86V7667) += ml86v7667.o obj-$(CONFIG_VIDEO_OV2659) += ov2659.o obj-$(CONFIG_VIDEO_TC358743) += tc358743.o +obj-$(CONFIG_VIDEO_OV5647) += ov5647.o diff --git a/drivers/media/i2c/ov5647.c b/drivers/media/i2c/ov5647.c new file mode 100644 index 0000000..2aae806 --- /dev/null +++ b/drivers/media/i2c/ov5647.c @@ -0,0 +1,866 @@ +/* + * A V4L2 driver for OmniVision OV5647 cameras. + * + * Based on Samsung S5K6AAFX SXGA 1/6" 1.3M CMOS Image Sensor driver + * Copyright (C) 2011 Sylwester Nawrocki + * + * Based on Omnivision OV7670 Camera Driver + * Copyright (C) 2006-7 Jonathan Corbet + * + * Copyright (C) 2016, Synopsys, Inc. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation version 2. + * + * This program is distributed .as is. WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define SENSOR_NAME "ov5647" + +#define OV5647_SW_RESET 0x1003 +#define OV5647_REG_CHIPID_H 0x300A +#define OV5647_REG_CHIPID_L 0x300B + +#define REG_TERM 0xfffe +#define VAL_TERM 0xfe +#define REG_DLY 0xffff + +#define OV5647_ROW_START 0x01 +#define OV5647_ROW_START_MIN 0 +#define OV5647_ROW_START_MAX 2004 +#define OV5647_ROW_START_DEF 54 + +#define OV5647_COLUMN_START 0x02 +#define OV5647_COLUMN_START_MIN 0 +#define OV5647_COLUMN_START_MAX 2750 +#define OV5647_COLUMN_START_DEF 16 + +#define OV5647_WINDOW_HEIGHT 0x03 +#define OV5647_WINDOW_HEIGHT_MIN 2 +#define OV5647_WINDOW_HEIGHT_MAX 2006 +#define OV5647_WINDOW_HEIGHT_DEF 1944 + +#define OV5647_WINDOW_WIDTH 0x04 +#define OV5647_WINDOW_WIDTH_MIN 2 +#define OV5647_WINDOW_WIDTH_MAX 2752 +#define OV5647_WINDOW_WIDTH_DEF 2592 + +struct regval_list { + u16 addr; + u8 data; +}; + +struct cfg_array { + struct regval_list *regs; + int size; +}; + +struct sensor_win_size { + int width; + int height; + unsigned int hoffset; + unsigned int voffset; + unsigned int hts; + unsigned int vts; + unsigned int pclk; + unsigned int mipi_bps; + unsigned int fps_fixed; + unsigned int bin_factor; + unsigned int intg_min; + unsigned int intg_max; + void *regs; + int regs_size; + int (*set_size)(struct v4l2_subdev *sd); +}; + + +struct ov5647 { + struct device *dev; + struct v4l2_subdev sd; + struct media_pad pad; + struct mutex lock; + struct v4l2_mbus_framefmt format; + struct sensor_format_struct *fmt; + unsigned int width; + unsigned int height; + unsigned int capture_mode; + int hue; + struct v4l2_fract tpf; + struct sensor_win_size *current_wins; +}; + +static inline struct ov5647 *to_state(struct v4l2_subdev *sd) +{ + return container_of(sd, struct ov5647, sd); +} + +static struct regval_list sensor_oe_disable_regs[] = { + {0x3000, 0x00}, + {0x3001, 0x00}, + {0x3002, 0x00}, +}; + +static struct regval_list sensor_oe_enable_regs[] = { + {0x3000, 0x0f}, + {0x3001, 0xff}, + {0x3002, 0xe4}, +}; + +static struct regval_list ov5647_640x480[] = { + {0x0100, 0x00}, + {0x0103, 0x01}, + {0x3034, 0x08}, + {0x3035, 0x21}, + {0x3036, 0x46}, + {0x303c, 0x11}, + {0x3106, 0xf5}, + {0x3821, 0x07}, + {0x3820, 0x41}, + {0x3827, 0xec}, + {0x370c, 0x0f}, + {0x3612, 0x59}, + {0x3618, 0x00}, + {0x5000, 0x06}, + {0x5001, 0x01}, + {0x5002, 0x41}, + {0x5003, 0x08}, + {0x5a00, 0x08}, + {0x3000, 0x00}, + {0x3001, 0x00}, + {0x3002, 0x00}, + {0x3016, 0x08}, + {0x3017, 0xe0}, + {0x3018, 0x44}, + {0x301c, 0xf8}, + {0x301d, 0xf0}, + {0x3a18, 0x00}, + {0x3a19, 0xf8}, + {0x3c01, 0x80}, + {0x3b07, 0x0c}, + {0x380c, 0x07}, + {0x380d, 0x68}, + {0x380e, 0x03}, + {0x380f, 0xd8}, + {0x3814, 0x31}, + {0x3815, 0x31}, + {0x3708, 0x64}, + {0x3709, 0x52}, + {0x3808, 0x02}, + {0x3809, 0x80}, + {0x380a, 0x01}, + {0x380b, 0xE0}, + {0x3801, 0x00}, + {0x3802, 0x00}, + {0x3803, 0x00}, + {0x3804, 0x0a}, + {0x3805, 0x3f}, + {0x3806, 0x07}, + {0x3807, 0xa1}, + {0x3811, 0x08}, + {0x3813, 0x02}, + {0x3630, 0x2e}, + {0x3632, 0xe2}, + {0x3633, 0x23}, + {0x3634, 0x44}, + {0x3636, 0x06}, + {0x3620, 0x64}, + {0x3621, 0xe0}, + {0x3600, 0x37}, + {0x3704, 0xa0}, + {0x3703, 0x5a}, + {0x3715, 0x78}, + {0x3717, 0x01}, + {0x3731, 0x02}, + {0x370b, 0x60}, + {0x3705, 0x1a}, + {0x3f05, 0x02}, + {0x3f06, 0x10}, + {0x3f01, 0x0a}, + {0x3a08, 0x01}, + {0x3a09, 0x27}, + {0x3a0a, 0x00}, + {0x3a0b, 0xf6}, + {0x3a0d, 0x04}, + {0x3a0e, 0x03}, + {0x3a0f, 0x58}, + {0x3a10, 0x50}, + {0x3a1b, 0x58}, + {0x3a1e, 0x50}, + {0x3a11, 0x60}, + {0x3a1f, 0x28}, + {0x4001, 0x02}, + {0x4004, 0x02}, + {0x4000, 0x09}, + {0x4837, 0x24}, + {0x4050, 0x6e}, + {0x4051, 0x8f}, + {0x0100, 0x01}, +}; + +struct sensor_format_struct; + +/** + * @short I2C Write operation + * @param[in] i2c_client I2C client + * @param[in] reg register address + * @param[in] val value to write + * @return Error code + */ +static int ov5647_write(struct v4l2_subdev *sd, u16 reg, u8 val) +{ + int ret; + unsigned char data[3] = { reg >> 8, reg & 0xff, val}; + struct i2c_client *client = v4l2_get_subdevdata(sd); + + ret = i2c_master_send(client, data, 3); + if (ret != 3) { + dev_dbg(&client->dev, "%s: i2c write error, reg: %x\n", + __func__, reg); + return ret < 0 ? ret : -EIO; + } + return 0; +} + +/** + * @short I2C Read operation + * @param[in] i2c_client I2C client + * @param[in] reg register address + * @param[out] val value read + * @return Error code + */ +static int ov5647_read(struct v4l2_subdev *sd, u16 reg, u8 *val) +{ + int ret; + unsigned char data_w[2] = { reg >> 8, reg & 0xff }; + struct i2c_client *client = v4l2_get_subdevdata(sd); + + + ret = i2c_master_send(client, data_w, 2); + + if (ret < 2) { + dev_dbg(&client->dev, "%s: i2c read error, reg: %x\n", + __func__, reg); + return ret < 0 ? ret : -EIO; + } + + + ret = i2c_master_recv(client, val, 1); + + if (ret < 1) { + dev_dbg(&client->dev, "%s: i2c read error, reg: %x\n", + __func__, reg); + return ret < 0 ? ret : -EIO; + } + return 0; +} + +static int ov5647_write_array(struct v4l2_subdev *sd, + struct regval_list *regs, int array_size) +{ + int i = 0; + int ret = 0; + + if (!regs) + return -EINVAL; + + while (i < array_size) { + ret = ov5647_write(sd, regs->addr, regs->data); + if (ret < 0) + return ret; + i++; + regs++; + } + return 0; +} + +static void ov5647_set_virtual_channel(struct v4l2_subdev *sd, int channel) +{ + u8 channel_id; + + ov5647_read(sd, 0x4814, &channel_id); + channel_id &= ~(3 << 6); + ov5647_write(sd, 0x4814, channel_id | (channel << 6)); +} + +void ov5647_stream_on(struct v4l2_subdev *sd) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + + ov5647_write(sd, 0x4202, 0x00); + dev_dbg(&client->dev, "Stream on"); + ov5647_write(sd, 0x300D, 0x00); +} + +void ov5647_stream_off(struct v4l2_subdev *sd) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + + ov5647_write(sd, 0x4202, 0x0f); + dev_dbg(&client->dev, "Stream off"); + ov5647_write(sd, 0x300D, 0x01); +} + +/****************************************************************************/ + +/** + * @short Set SW standby + * @param[in] sd v4l2 sd + * @param[in] stanby standby mode status (on or off) + * @return Error code + */ +static int set_sw_standby(struct v4l2_subdev *sd, bool standby) +{ + int ret; + unsigned char rdval; + + ret = ov5647_read(sd, 0x0100, &rdval); + if (ret != 0) + return ret; + + if (standby) + rdval &= 0xfe; + else + rdval |= 0x01; + + ret = ov5647_write(sd, 0x0100, rdval); + + return ret; +} + +/** + * @short Store information about the video data format. + */ +static struct sensor_format_struct { + u8 *desc; + u32 mbus_code; + struct regval_list *regs; + int regs_size; + int bpp; +} sensor_formats[] = { + { + .desc = "Raw RGB Bayer", + .mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8, + .regs = ov5647_640x480, + .regs_size = ARRAY_SIZE(ov5647_640x480), + .bpp = 1 + }, +}; +#define N_FMTS ARRAY_SIZE(sensor_formats) + +/* ----------------------------------------------------------------------- */ + +/** + * @short Initialize sensor + * @param[in] sd v4l2 subdev + * @param[in] val not used + * @return Error code + */ +static int __sensor_init(struct v4l2_subdev *sd) +{ + int ret; + u8 resetval; + u8 rdval; + struct i2c_client *client = v4l2_get_subdevdata(sd); + + dev_dbg(&client->dev, "sensor init\n"); + + ret = ov5647_read(sd, 0x0100, &rdval); + if (ret != 0) + return ret; + + ov5647_write(sd, 0x4800, 0x25); + ov5647_stream_off(sd); + + ret = ov5647_write_array(sd, ov5647_640x480, + ARRAY_SIZE(ov5647_640x480)); + if (ret < 0) { + dev_err(&client->dev, "write sensor_default_regs error\n"); + return ret; + } + + ov5647_set_virtual_channel(sd, 0); + + ov5647_read(sd, 0x0100, &resetval); + if (!(resetval & 0x01)) { + dev_err(&client->dev, "Device was in SW standby"); + ov5647_write(sd, 0x0100, 0x01); + } + + ov5647_write(sd, 0x4800, 0x04); + ov5647_stream_on(sd); + + return 0; +} + +/** + * @short Control sensor power state + * @param[in] sd v4l2 subdev + * @param[in] on Sensor power + * @return Error code + */ +static int sensor_power(struct v4l2_subdev *sd, int on) +{ + int ret; + struct ov5647 *ov5647 = to_state(sd); + struct i2c_client *client = v4l2_get_subdevdata(sd); + + ret = 0; + mutex_lock(&ov5647->lock); + + if (on) { + dev_dbg(&client->dev, "OV5647 power on\n"); + + ret = ov5647_write_array(sd, sensor_oe_enable_regs, + ARRAY_SIZE(sensor_oe_enable_regs)); + + ret = __sensor_init(sd); + + if (ret < 0) + dev_err(&client->dev, + "Camera not available, check Power\n"); + } else { + dev_dbg(&client->dev, "OV5647 power off\n"); + + dev_dbg(&client->dev, "disable oe\n"); + ret = ov5647_write_array(sd, sensor_oe_disable_regs, + ARRAY_SIZE(sensor_oe_disable_regs)); + + if (ret < 0) + dev_dbg(&client->dev, "disable oe failed\n"); + + ret = set_sw_standby(sd, true); + + if (ret < 0) + dev_dbg(&client->dev, "soft stby failed\n"); + + } + + mutex_unlock(&ov5647->lock); + + return ret; +} + +#ifdef CONFIG_VIDEO_ADV_DEBUG +/** + * @short Get register value + * @param[in] sd v4l2 subdev + * @param[in] reg register struct + * @return Error code + */ +static int sensor_get_register(struct v4l2_subdev *sd, + struct v4l2_dbg_register *reg) +{ + unsigned char val = 0; + int ret; + + ret = ov5647_read(sd, reg->reg & 0xff, &val); + if (ret != 0) + return ret; + + reg->val = val; + reg->size = 1; + + return ret; +} + +/** + * @short Set register value + * @param[in] sd v4l2 subdev + * @param[in] reg register struct + * @return Error code + */ +static int sensor_set_register(struct v4l2_subdev *sd, + const struct v4l2_dbg_register *reg) +{ + return ov5647_write(sd, reg->reg & 0xff, reg->val & 0xff); +} +#endif + +/* ----------------------------------------------------------------------- */ + +/** + * @short Subdev core operations registration + */ +static const struct v4l2_subdev_core_ops sensor_core_ops = { + .s_power = sensor_power, +#ifdef CONFIG_VIDEO_ADV_DEBUG + .g_register = sensor_get_register, + .s_register = sensor_set_register, +#endif +}; + +/* ----------------------------------------------------------------------- */ + + + +/** + * @short Enumerate available image formats + * @param[in] sd v4l2 subdev + * @param[in] index index + * @param[in] code MBUS Pixel code + * @return Error code + */ +static int sensor_enum_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_mbus_code_enum *code) +{ + if (code->pad || code->index >= N_FMTS) + return -EINVAL; + + code->code = sensor_formats[code->index].mbus_code; + return 0; +} + +/** + * @short Try frame format internal function + * @param[in] sd v4l2 subdev + * @param[in] fmt frame format + * @return Error code + */ +static int sensor_try_fmt_internal(struct v4l2_subdev *sd, + struct v4l2_mbus_framefmt *fmt, struct sensor_format_struct **ret_fmt, + struct sensor_win_size **ret_wsize) +{ + int index; + + for (index = 0; index < N_FMTS; index++) + if (sensor_formats[index].mbus_code == fmt->code) + break; + + if (index >= N_FMTS) + return -EINVAL; + + if (ret_fmt != NULL) + *ret_fmt = sensor_formats + index; + + fmt->field = V4L2_FIELD_NONE; + + return 0; +} + +/** + * @short Set frame format + * @param[in] sd v4l2 subdev + * @param[in] fmt frame format + * @return Error code + */ +static int sensor_s_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *fmt) +{ + int ret; + struct sensor_format_struct *sensor_fmt; + struct sensor_win_size *wsize; + struct ov5647 *info = to_state(sd); + + ov5647_write_array(sd, sensor_oe_disable_regs, + ARRAY_SIZE(sensor_oe_disable_regs)); + + ret = sensor_try_fmt_internal(sd, &fmt->format, + &sensor_fmt, &wsize); + if (ret) + return ret; + + ov5647_write_array(sd, sensor_fmt->regs, sensor_fmt->regs_size); + + ret = 0; + + if (wsize->regs) + ov5647_write_array(sd, wsize->regs, wsize->regs_size); + + if (wsize->set_size) + wsize->set_size(sd); + + info->fmt = sensor_fmt; + info->width = wsize->width; + info->height = wsize->height; + + ov5647_write_array(sd, sensor_oe_enable_regs, + ARRAY_SIZE(sensor_oe_enable_regs)); + + return 0; +} + +/** + * @short Set stream parameters + * @param[in] sd v4l2 subdev + * @param[in] parms stream parameters + * @return Error code + */ +static int sensor_s_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms) +{ + struct v4l2_captureparm *cp = &parms->parm.capture; + struct ov5647 *info = to_state(sd); + + if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + if (info->tpf.numerator == 0) + return -EINVAL; + + info->capture_mode = cp->capturemode; + + return 0; +} + +/** + * @short Get stream parameters + * @param[in] sd v4l2 subdev + * @param[in] parms stream parameters + * @return Error code + */ +static int sensor_g_parm(struct v4l2_subdev *sd, struct v4l2_streamparm *parms) +{ + struct v4l2_captureparm *cp = &parms->parm.capture; + struct ov5647 *info = to_state(sd); + + if (parms->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) + return -EINVAL; + + memset(cp, 0, sizeof(struct v4l2_captureparm)); + cp->capability = V4L2_CAP_TIMEPERFRAME; + cp->capturemode = info->capture_mode; + + return 0; +} + +/** + * @short Subdev video operations registration + * + */ +static const struct v4l2_subdev_video_ops sensor_video_ops = { + .s_parm = sensor_s_parm, + .g_parm = sensor_g_parm, +}; + +/* ----------------------------------------------------------------------- */ + +/** + * @short Subdev operations registration + * + */ +static const struct v4l2_subdev_ops subdev_ops = { + .core = &sensor_core_ops, + .video = &sensor_video_ops, +}; + +/* ----------------------------------------------------------------------------- + * V4L2 subdev internal operations + */ + +/** + * @short Detect camera version and model + * @param[in] sd v4l2 subdev + * @return Error code + */ +int ov5647_detect(struct v4l2_subdev *sd) +{ + unsigned char v; + int ret; + struct i2c_client *client = v4l2_get_subdevdata(sd); + + ret = ov5647_write(sd, OV5647_SW_RESET, 0x01); + if (ret < 0) + return ret; + ret = ov5647_read(sd, OV5647_REG_CHIPID_H, &v); + if (ret < 0) + return ret; + if (v != 0x56) { + dev_err(&client->dev, "Wrong model version detected"); + return -ENODEV; + } + ret = ov5647_read(sd, OV5647_REG_CHIPID_L, &v); + if (ret < 0) + return ret; + if (v != 0x47) { + dev_err(&client->dev, "Wrong model version detected"); + return -ENODEV; + } + + ret = ov5647_write(sd, OV5647_SW_RESET, 0x00); + if (ret < 0) + return ret; + + return 0; +} + +/** + * @short Detect if camera is registered + * @param[in] sd v4l2 subdev + * @return Error code + */ +static int ov5647_registered(struct v4l2_subdev *sd) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + + dev_info(&client->dev, "OV5647 detected at address 0x%02x\n", + client->addr); + + return 0; +} + +/** + * @short Open device + * @param[in] sd v4l2 subdev + * @param[in] fh v4l2 file handler + * @return Error code + */ +static int ov5647_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + struct v4l2_mbus_framefmt *format = + v4l2_subdev_get_try_format(sd, fh->pad, 0); + struct v4l2_rect *crop = + v4l2_subdev_get_try_crop(sd, fh->pad, 0); + + crop->left = OV5647_COLUMN_START_DEF; + crop->top = OV5647_ROW_START_DEF; + crop->width = OV5647_WINDOW_WIDTH_DEF; + crop->height = OV5647_WINDOW_HEIGHT_DEF; + + format->code = MEDIA_BUS_FMT_SBGGR8_1X8; + + format->width = OV5647_WINDOW_WIDTH_DEF; + format->height = OV5647_WINDOW_HEIGHT_DEF; + format->field = V4L2_FIELD_NONE; + format->colorspace = V4L2_COLORSPACE_SRGB; + + return sensor_power(sd, true); +} + +/** + * @short Open device + * @param[in] sd v4l2 subdev + * @param[in] fh v4l2 file handler + * @return Error code + */ +static int ov5647_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh) +{ + return sensor_power(sd, false); +} + +/** + * @short Subdev internal operations registration + * + */ +static const struct v4l2_subdev_internal_ops ov5647_subdev_internal_ops = { + .registered = ov5647_registered, + .open = ov5647_open, + .close = ov5647_close, +}; + +/** + * @short Initialization routine - Entry point of the driver + * @param[in] client pointer to the i2c client structure + * @param[in] id pointer to the i2c device id structure + * @return 0 on success and a negative number on failure + */ +static int ov5647_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct ov5647 *sensor; + int ret = 0; + struct v4l2_subdev *sd; + + dev_info(&client->dev, "Installing OmniVision OV5647 camera driver\n"); + + sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL); + if (sensor == NULL) + return -ENOMEM; + + mutex_init(&sensor->lock); + sensor->dev = dev; + + sd = &sensor->sd; + v4l2_i2c_subdev_init(sd, client, &subdev_ops); + sensor->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + + sensor->pad.flags = MEDIA_PAD_FL_SOURCE; + sd->entity.function = MEDIA_ENT_F_CAM_SENSOR; + ret = media_entity_pads_init(&sd->entity, 1, &sensor->pad); + if (ret < 0) + goto mutex_remove; + + ret = ov5647_detect(sd); + if (ret < 0) + goto error; + + ret = v4l2_async_register_subdev(sd); + if (ret < 0) + goto error; + + return 0; +error: + media_entity_cleanup(&sd->entity); +mutex_remove: + mutex_destroy(&sensor->lock); + return ret; +} + +/** + * @short Exit routine - Exit point of the driver + * @param[in] client pointer to the i2c client structure + * @return 0 on success and a negative number on failure + */ +static int ov5647_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov5647 *ov5647 = to_state(sd); + + v4l2_async_unregister_subdev(&ov5647->sd); + media_entity_cleanup(&ov5647->sd.entity); + v4l2_device_unregister_subdev(sd); + mutex_destroy(&ov5647->lock); + + return 0; +} + +static const struct i2c_device_id ov5647_id[] = { + { "ov5647", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, ov5647_id); + +#if IS_ENABLED(CONFIG_OF) +static const struct of_device_id ov5647_of_match[] = { + { .compatible = "ovti,ov5647" }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, ov5647_of_match); +#endif + +/** + * @short i2c driver structure + */ +static struct i2c_driver ov5647_driver = { + .driver = { + .of_match_table = of_match_ptr(ov5647_of_match), + .owner = THIS_MODULE, + .name = "ov5647", + }, + .probe = ov5647_probe, + .remove = ov5647_remove, + .id_table = ov5647_id, +}; + +module_i2c_driver(ov5647_driver); + +MODULE_AUTHOR("Ramiro Oliveira "); +MODULE_DESCRIPTION("A low-level driver for OmniVision ov5647 sensors"); +MODULE_LICENSE("GPL v2");