From patchwork Wed Feb 28 15:27:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rui Miguel Silva X-Patchwork-Id: 130002 Delivered-To: patch@linaro.org Received: by 10.80.172.228 with SMTP id x91csp1665824edc; Wed, 28 Feb 2018 07:28:26 -0800 (PST) X-Google-Smtp-Source: AH8x2253isN4UYTREEb+LnEUzV6l/eKXkI/JwG/Rmr2WeUS97Q0Rk2xFyS0QuQI4wkcT2Tq90HzZ X-Received: by 2002:a17:902:595d:: with SMTP id e29-v6mr18480441plj.189.1519831705869; Wed, 28 Feb 2018 07:28:25 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1519831705; cv=none; d=google.com; s=arc-20160816; b=OwofuL0Wx4N0DWQ+kYuAZ+oi4WYWjtDdJ/Xya55gc3Oc6P5LoJrpEuZKGxFxTZsM4p yJqVZ4b/xl1nRGtgU9rVXG7MgLZYmgtkTsziLi3b86LQ8WdHppvvEy5oni3dzt7ks+3T 51yeoA5iLTUjdxxbFewOtA3CjM3uqZ+YM3AW12OQpmDVtv5MTCHNi9zOezA6CUZXxY61 WzljiFPpaX5AuV6q+44bElZkTgaBDrUggjI36CL2KdsW7Vjq+OjvJ3HKDqivy3rwggGr UfDY7SpDvun66JRh3u6fyRq8jawTDy5JB86uUZWSVyP+WUvrz9Od3Z0DZRhv3+jU0o80 SgJg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:references:in-reply-to:message-id:date :subject:cc:to:from:dkim-signature:arc-authentication-results; bh=MWdT/py/1+HeqTNoX6L2ul1YPM9tgF3z0OzNAPa7APY=; b=Ttozw56SRCEXDl0LBQyNFE7+lU5uedy18BaKSLS+ZnLaU4Fb1hNb+GSSKezFwBoDKl jWbsUsZq92VFs/L/7QISNN7KO1ST5m4rt3Cbt6+Ov5W4cm/rh9vM6258d9QQMzbCcR7W /aD0RrvO9Vn1kiUcI0G18JQI8AgrL5pSFcGTFPfpjDFYIJvEXTwUKd/H7N4tw6dmHUrc PXLnKrAk5C8z6DmDEG6X6l6GpdqFTNFAU4XSfC+nBhR8cQyA7NG18JnUDbyQJPgyzqn4 KBWMP1IuDA8EvmDzLest6POahLzPNOBKjtjGP8XI8XmRY+HcKyqoThvWZWMOkZDDcQCF VNdA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=Vh7erx6D; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id f9-v6si1469959pli.445.2018.02.28.07.28.25; Wed, 28 Feb 2018 07:28:25 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=Vh7erx6D; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933095AbeB1P2V (ORCPT + 28 others); Wed, 28 Feb 2018 10:28:21 -0500 Received: from mail-wr0-f195.google.com ([209.85.128.195]:43222 "EHLO mail-wr0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932910AbeB1P14 (ORCPT ); Wed, 28 Feb 2018 10:27:56 -0500 Received: by mail-wr0-f195.google.com with SMTP id u49so2833595wrc.10 for ; Wed, 28 Feb 2018 07:27:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=MWdT/py/1+HeqTNoX6L2ul1YPM9tgF3z0OzNAPa7APY=; b=Vh7erx6DaEniNmwY8CqvDaBdwnC6oqZBvL9iAX1NzwZxkEq2+s7FciUJWNCVbrDcuO G08zGxkutPunh/IsJ3ycn+K/oLQyBbUtm5QYF1z7rlCRwjO5evmozihd2NdfxrBtZwzQ Vlg+yM0MscYVUkjCYnm4H5Q3UAqM784jjG1Ic= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=MWdT/py/1+HeqTNoX6L2ul1YPM9tgF3z0OzNAPa7APY=; b=js2mwC8Tq0D27pkLpZ7p4bsXrZEGkkkYTdLH9Tu5U4zq9Y2l3e4l3brl3G6c19RrA8 gUqDGcgtNS4/K4O2o29HuUAfjYFKImnIXWq74fQJrpT6gN3+vFxwl77iMRPvT8cV18Gx KsrQrTKwua7qwtQAROZcGS89GXXFD0dY0l84E/e3cchjtFqf1rKPRtM/+2VphGUi7kWG fUrtpjkLYBnYNV9HifTgiE07wcAWBkNHMtLk61eCzKbXGg4ANVf46K1N+PuEP4rbYyp7 dNDzt3Dvj7GsgjkZKLeJRxDAx+XbYJRaeIS8Sataj5uJxYKcu8LdTw0+ApnoJy4qpvmB qfKQ== X-Gm-Message-State: APf1xPAIA3ccTCN2L7g079gMLxbDhmydVYqULw31rcc2egKgXTj5+lp7 Njx7FjyTmOtwLExmZCwPlhjIvA== X-Received: by 10.223.135.17 with SMTP id a17mr16050862wra.126.1519831674163; Wed, 28 Feb 2018 07:27:54 -0800 (PST) Received: from localhost.localdomain ([2001:8a0:6606:9100:fe64:a386:8845:a072]) by smtp.gmail.com with ESMTPSA id y8sm2015391wmb.48.2018.02.28.07.27.52 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 28 Feb 2018 07:27:53 -0800 (PST) From: Rui Miguel Silva To: mchehab@kernel.org, sakari.ailus@linux.intel.com, hverkuil@xs4all.nl Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Ryan Harkin , Rui Miguel Silva Subject: [PATCH v2 2/2] media: ov2680: Add Omnivision OV2680 sensor driver Date: Wed, 28 Feb 2018 15:27:23 +0000 Message-Id: <20180228152723.26392-3-rui.silva@linaro.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180228152723.26392-1-rui.silva@linaro.org> References: <20180228152723.26392-1-rui.silva@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds V4L2 sub-device driver for OV2680 image sensor. The OV2680 is a 1/5" CMOS color sensor from Omnivision. Supports output format: 10-bit Raw RGB. The OV2680 has a single lane MIPI interface. The driver exposes following V4L2 controls: - auto/manual exposure, - exposure, - auto/manual gain, - gain, - horizontal/vertical flip, - test pattern menu. Supported resolution are only: QUXGA, 720P, UXGA. Signed-off-by: Rui Miguel Silva --- drivers/media/i2c/Kconfig | 12 + drivers/media/i2c/Makefile | 1 + drivers/media/i2c/ov2680.c | 1094 ++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 1107 insertions(+) create mode 100644 drivers/media/i2c/ov2680.c -- 2.16.2 diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 9f18cd296841..39dc9f236ffa 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -586,6 +586,18 @@ config VIDEO_OV2659 To compile this driver as a module, choose M here: the module will be called ov2659. +config VIDEO_OV2680 + tristate "OmniVision OV2680 sensor support" + depends on GPIOLIB && VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API + depends on MEDIA_CAMERA_SUPPORT + select V4L2_FWNODE + ---help--- + This is a Video4Linux2 sensor-level driver for the OmniVision + OV2680 camera sensor with a MIPI CSI-2 interface. + + To compile this driver as a module, choose M here: the + module will be called ov2680. + config VIDEO_OV5640 tristate "OmniVision OV5640 sensor support" depends on OF diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile index c0f94cd8d56d..d0aba4d37b8d 100644 --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -61,6 +61,7 @@ obj-$(CONFIG_VIDEO_SONY_BTF_MPX) += sony-btf-mpx.o obj-$(CONFIG_VIDEO_UPD64031A) += upd64031a.o obj-$(CONFIG_VIDEO_UPD64083) += upd64083.o obj-$(CONFIG_VIDEO_OV2640) += ov2640.o +obj-$(CONFIG_VIDEO_OV2680) += ov2680.o obj-$(CONFIG_VIDEO_OV5640) += ov5640.o obj-$(CONFIG_VIDEO_OV5645) += ov5645.o obj-$(CONFIG_VIDEO_OV5647) += ov5647.o diff --git a/drivers/media/i2c/ov2680.c b/drivers/media/i2c/ov2680.c new file mode 100644 index 000000000000..78f2be27a8f5 --- /dev/null +++ b/drivers/media/i2c/ov2680.c @@ -0,0 +1,1094 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Omnivision OV2680 CMOS Image Sensor driver + * + * Copyright (C) 2018 Linaro Ltd + * + * Based on OV5640 Sensor Driver + * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved. + * Copyright (C) 2014-2017 Mentor Graphics Inc. + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#define OV2680_XVCLK_MIN 6000000 +#define OV2680_XVCLK_MAX 24000000 + +#define OV2680_CHIP_ID 0x2680 + +#define OV2680_REG_STREAM_CTRL 0x0100 +#define OV2680_REG_SOFT_RESET 0x0103 + +#define OV2680_REG_CHIP_ID_HIGH 0x300a +#define OV2680_REG_CHIP_ID_LOW 0x300b + +#define OV2680_REG_R_MANUAL 0x3503 +#define OV2680_REG_GAIN_PK 0x350a +#define OV2680_REG_EXPOSURE_PK_HIGH 0x3500 +#define OV2680_REG_TIMING_HTS 0x380c +#define OV2680_REG_TIMING_VTS 0x380e +#define OV2680_REG_FORMAT1 0x3820 +#define OV2680_REG_FORMAT2 0x3821 + +#define OV2680_REG_ISP_CTRL00 0x5080 + +#define OV2680_FRAME_RATE 30 + +#define OV2680_REG_VALUE_8BIT 1 +#define OV2680_REG_VALUE_16BIT 2 +#define OV2680_REG_VALUE_24BIT 3 + +enum ov2680_mode_id { + OV2680_MODE_QUXGA_800_600, + OV2680_MODE_720P_1280_720, + OV2680_MODE_UXGA_1600_1200, + OV2680_MODE_MAX, +}; + +struct reg_value { + u16 reg_addr; + u8 val; +}; + +struct ov2680_mode_info { + const char *name; + enum ov2680_mode_id id; + u32 width; + u32 height; + const struct reg_value *reg_data; + u32 reg_data_size; +}; + +struct ov2680_ctrls { + struct v4l2_ctrl_handler handler; + struct { + struct v4l2_ctrl *auto_exp; + struct v4l2_ctrl *exposure; + }; + struct { + struct v4l2_ctrl *auto_gain; + struct v4l2_ctrl *gain; + }; + + struct v4l2_ctrl *hflip; + struct v4l2_ctrl *vflip; + struct v4l2_ctrl *test_pattern; +}; + +struct ov2680_dev { + struct i2c_client *i2c_client; + struct v4l2_subdev sd; + + struct media_pad pad; + struct clk *xvclk; + u32 xvclk_freq; + + struct gpio_desc *pwdn_gpio; + struct mutex lock; /* protect members */ + + bool mode_pending_changes; + bool is_enabled; + bool is_streaming; + + struct ov2680_ctrls ctrls; + struct v4l2_mbus_framefmt fmt; + struct v4l2_fract frame_interval; + + const struct ov2680_mode_info *current_mode; +}; + +static const char * const test_pattern_menu[] = { + "Disabled", + "Color Bars", + "Random Data", + "Square", + "Black Image", +}; + +static const struct reg_value ov2680_setting_30fps_QUXGA_800_600[] = { + {0x3086, 0x01}, {0x370a, 0x23}, {0x3808, 0x03}, {0x3809, 0x20}, + {0x380a, 0x02}, {0x380b, 0x58}, {0x380c, 0x06}, {0x380d, 0xac}, + {0x380e, 0x02}, {0x380f, 0x84}, {0x3811, 0x04}, {0x3813, 0x04}, + {0x3814, 0x31}, {0x3815, 0x31}, {0x3820, 0xc0}, {0x4008, 0x00}, + {0x4009, 0x03}, {0x4837, 0x1e}, {0x3501, 0x4e}, {0x3502, 0xe0}, +}; + +static const struct reg_value ov2680_setting_30fps_720P_1280_720[] = { + {0x3086, 0x00}, {0x3808, 0x05}, {0x3809, 0x00}, {0x380a, 0x02}, + {0x380b, 0xd0}, {0x380c, 0x06}, {0x380d, 0xa8}, {0x380e, 0x05}, + {0x380f, 0x0e}, {0x3811, 0x08}, {0x3813, 0x06}, {0x3814, 0x11}, + {0x3815, 0x11}, {0x3820, 0xc0}, {0x4008, 0x00}, +}; + +static const struct reg_value ov2680_setting_30fps_UXGA_1600_1200[] = { + {0x3086, 0x00}, {0x3501, 0x4e}, {0x3502, 0xe0}, {0x3808, 0x06}, + {0x3809, 0x40}, {0x380a, 0x04}, {0x380b, 0xb0}, {0x380c, 0x06}, + {0x380d, 0xa8}, {0x380e, 0x05}, {0x380f, 0x0e}, {0x3811, 0x00}, + {0x3813, 0x00}, {0x3814, 0x11}, {0x3815, 0x11}, {0x3820, 0xc0}, + {0x4008, 0x00}, {0x4837, 0x18} +}; + +static const struct ov2680_mode_info ov2680_mode_init_data = { + "mode_quxga_800_600", OV2680_MODE_QUXGA_800_600, 800, 600, + ov2680_setting_30fps_QUXGA_800_600, + ARRAY_SIZE(ov2680_setting_30fps_QUXGA_800_600), +}; + +static const struct ov2680_mode_info +ov2680_mode_data[OV2680_MODE_MAX] = { + {"mode_quxga_800_600", OV2680_MODE_QUXGA_800_600, + 800, 600, ov2680_setting_30fps_QUXGA_800_600, + ARRAY_SIZE(ov2680_setting_30fps_QUXGA_800_600)}, + {"mode_720p_1280_720", OV2680_MODE_720P_1280_720, + 1280, 720, ov2680_setting_30fps_720P_1280_720, + ARRAY_SIZE(ov2680_setting_30fps_720P_1280_720)}, + {"mode_uxga_1600_1200", OV2680_MODE_UXGA_1600_1200, + 1600, 1200, ov2680_setting_30fps_UXGA_1600_1200, + ARRAY_SIZE(ov2680_setting_30fps_UXGA_1600_1200)}, +}; + +static struct ov2680_dev *to_ov2680_dev(struct v4l2_subdev *sd) +{ + return container_of(sd, struct ov2680_dev, sd); +} + +static struct device *ov2680_to_dev(struct ov2680_dev *sensor) +{ + return &sensor->i2c_client->dev; +} + +static inline struct v4l2_subdev *ctrl_to_sd(struct v4l2_ctrl *ctrl) +{ + return &container_of(ctrl->handler, struct ov2680_dev, + ctrls.handler)->sd; +} + +static int __ov2680_write_reg(struct ov2680_dev *sensor, u16 reg, + unsigned int len, u32 val) +{ + struct i2c_client *client = sensor->i2c_client; + struct i2c_msg msg; + __be32 val_be32; + u8 *val_p; + u8 buf[6]; + int ret; + int i = 0; + + buf[0] = reg >> 8; + buf[1] = reg & 0xff; + + val_be32 = cpu_to_be32(val); + val_p = (u8 *)&val_be32; + + while (i < len) { + buf[2 + i] = val_p[(4 - len) + i]; + i++; + } + + msg.addr = client->addr; + msg.flags = client->flags; + msg.buf = buf; + msg.len = 2 + len; + + ret = i2c_transfer(client->adapter, &msg, 1); + if (ret < 0) { + dev_err(&client->dev, "write error: reg=0x%4x: %d\n", reg, ret); + return ret; + } + + return 0; +} + +#define ov2680_write_reg(s, r, v) \ + __ov2680_write_reg(s, r, OV2680_REG_VALUE_8BIT, v); + +#define ov2680_write_reg16(s, r, v) \ + __ov2680_write_reg(s, r, OV2680_REG_VALUE_16BIT, v); + +#define ov2680_write_reg24(s, r, v) \ + __ov2680_write_reg(s, r, OV2680_REG_VALUE_24BIT, v); + +static int __ov2680_read_reg(struct ov2680_dev *sensor, u16 reg, + unsigned int len, u32 *val) +{ + struct i2c_client *client = sensor->i2c_client; + struct i2c_msg msg[2]; + __be32 data_be = 0; + u8 *data_be_p; + u8 buf[2]; + int ret; + + buf[0] = reg >> 8; + buf[1] = reg & 0xff; + + data_be_p = (u8 *)&data_be; + + msg[0].addr = client->addr; + msg[0].flags = client->flags; + msg[0].buf = buf; + msg[0].len = sizeof(buf); + + msg[1].addr = client->addr; + msg[1].flags = client->flags | I2C_M_RD; + msg[1].buf = &data_be_p[4 - len]; + msg[1].len = len; + + ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg)); + if (ret < 0) { + dev_err(&client->dev, "read error: reg=0x%4x: %d\n", reg, ret); + return ret; + } + + *val = be32_to_cpu(data_be); + + return 0; +} + +#define ov2680_read_reg(s, r, v) \ + __ov2680_read_reg(s, r, OV2680_REG_VALUE_8BIT, v); + +#define ov2680_read_reg16(s, r, v) \ + __ov2680_read_reg(s, r, OV2680_REG_VALUE_16BIT, v); + +#define ov2680_read_reg24(s, r, v) \ + __ov2680_read_reg(s, r, OV2680_REG_VALUE_24BIT, v); + +static int ov2680_mod_reg(struct ov2680_dev *sensor, u16 reg, u8 mask, u8 val) +{ + u32 readval; + int ret; + + ret = ov2680_read_reg(sensor, reg, &readval); + if (ret < 0) + return ret; + + readval &= ~mask; + val &= mask; + val |= readval; + + return ov2680_write_reg(sensor, reg, val); +} + +static int ov2680_load_regs(struct ov2680_dev *sensor, + const struct ov2680_mode_info *mode) +{ + const struct reg_value *regs = mode->reg_data; + unsigned int i; + int ret = 0; + u16 reg_addr; + u8 val; + + for (i = 0; i < mode->reg_data_size; ++i, ++regs) { + reg_addr = regs->reg_addr; + val = regs->val; + + ret = ov2680_write_reg(sensor, reg_addr, val); + if (ret) + break; + } + + return ret; +} + +static void ov2680_power_up(struct ov2680_dev *sensor) +{ + if (!sensor->pwdn_gpio) + return; + + gpiod_set_value(sensor->pwdn_gpio, 1); + usleep_range(5000, 10000); +} + +static void ov2680_power_down(struct ov2680_dev *sensor) +{ + if (!sensor->pwdn_gpio) + return; + + gpiod_set_value(sensor->pwdn_gpio, 0); + usleep_range(5000, 10000); +} + +static int ov2680_vflip_enable(struct ov2680_dev *sensor) +{ + return ov2680_mod_reg(sensor, OV2680_REG_FORMAT1, BIT(2), BIT(2)); +} + +static int ov2680_vflip_disable(struct ov2680_dev *sensor) +{ + return ov2680_mod_reg(sensor, OV2680_REG_FORMAT1, BIT(2), 0); +} + +static int ov2680_hflip_enable(struct ov2680_dev *sensor) +{ + return ov2680_mod_reg(sensor, OV2680_REG_FORMAT2, BIT(2), BIT(2)); +} + +static int ov2680_hflip_disable(struct ov2680_dev *sensor) +{ + return ov2680_mod_reg(sensor, OV2680_REG_FORMAT2, BIT(2), 0); +} + +static int ov2680_test_pattern_set(struct ov2680_dev *sensor, int value) +{ + int ret; + + if (!value) + return ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, BIT(7), 0); + + ret = ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, 0x03, value - 1); + if (ret < 0) + return ret; + + ret = ov2680_mod_reg(sensor, OV2680_REG_ISP_CTRL00, BIT(7), BIT(7)); + if (ret < 0) + return ret; + + return 0; +} + +static int ov2680_gain_set(struct ov2680_dev *sensor, bool auto_gain) +{ + struct ov2680_ctrls *ctrls = &sensor->ctrls; + u32 gain; + int ret; + + ret = ov2680_mod_reg(sensor, OV2680_REG_R_MANUAL, BIT(1), + auto_gain ? 0 : BIT(1)); + if (ret < 0) + return ret; + + if (auto_gain || !ctrls->gain->is_new) + return 0; + + gain = ctrls->gain->val; + + ret = ov2680_write_reg16(sensor, OV2680_REG_GAIN_PK, gain); + + return 0; +} + +static int ov2680_gain_get(struct ov2680_dev *sensor) +{ + u32 gain; + int ret; + + ret = ov2680_read_reg16(sensor, OV2680_REG_GAIN_PK, &gain); + if (ret) + return ret; + + return gain; +} + +static int ov2680_auto_gain_enable(struct ov2680_dev *sensor) +{ + return ov2680_gain_set(sensor, true); +} + +static int ov2680_auto_gain_disable(struct ov2680_dev *sensor) +{ + return ov2680_gain_set(sensor, false); +} + +static int ov2680_exposure_set(struct ov2680_dev *sensor, bool auto_exp) +{ + struct ov2680_ctrls *ctrls = &sensor->ctrls; + u32 exp; + int ret; + + ret = ov2680_mod_reg(sensor, OV2680_REG_R_MANUAL, BIT(0), + auto_exp ? 0 : BIT(0)); + if (ret < 0) + return ret; + + if (auto_exp || !ctrls->exposure->is_new) + return 0; + + exp = (u32)ctrls->exposure->val; + exp <<= 4; + + return ov2680_write_reg24(sensor, OV2680_REG_EXPOSURE_PK_HIGH, exp); +} + +static int ov2680_exposure_get(struct ov2680_dev *sensor) +{ + int ret; + u32 exp; + + ret = ov2680_read_reg24(sensor, OV2680_REG_EXPOSURE_PK_HIGH, &exp); + if (ret) + return ret; + + return exp >> 4; +} + +static int ov2680_auto_exposure_enable(struct ov2680_dev *sensor) +{ + return ov2680_exposure_set(sensor, true); +} + +static int ov2680_auto_exposure_disable(struct ov2680_dev *sensor) +{ + return ov2680_exposure_set(sensor, false); +} + +static int ov2680_stream_enable(struct ov2680_dev *sensor) +{ + return ov2680_write_reg(sensor, OV2680_REG_STREAM_CTRL, 1); +} + +static int ov2680_stream_disable(struct ov2680_dev *sensor) +{ + return ov2680_write_reg(sensor, OV2680_REG_STREAM_CTRL, 0); +} + +static int ov2680_mode_set(struct ov2680_dev *sensor) +{ + struct ov2680_ctrls *ctrls = &sensor->ctrls; + int ret; + + ret = ov2680_auto_gain_disable(sensor); + if (ret < 0) + return ret; + + ret = ov2680_auto_exposure_disable(sensor); + if (ret < 0) + return ret; + + ret = ov2680_load_regs(sensor, sensor->current_mode); + if (ret < 0) + return ret; + + if (ctrls->auto_gain->val) { + ret = ov2680_auto_gain_enable(sensor); + if (ret < 0) + return ret; + } + + if (ctrls->auto_exp->val == V4L2_EXPOSURE_AUTO) { + ret = ov2680_auto_exposure_enable(sensor); + if (ret < 0) + return ret; + } + + sensor->mode_pending_changes = false; + + return 0; +} + +static int ov2680_mode_restore(struct ov2680_dev *sensor) +{ + int ret; + + ret = ov2680_load_regs(sensor, &ov2680_mode_init_data); + if (ret < 0) + return ret; + + return ov2680_mode_set(sensor); +} + +static int ov2680_power_off(struct ov2680_dev *sensor) +{ + if (!sensor->is_enabled) + return 0; + + clk_disable_unprepare(sensor->xvclk); + ov2680_power_down(sensor); + sensor->is_enabled = false; + + return 0; +} + +static int ov2680_power_on(struct ov2680_dev *sensor) +{ + struct device *dev = ov2680_to_dev(sensor); + int ret; + + if (sensor->is_enabled) + return 0; + + if (!sensor->pwdn_gpio) { + ret = ov2680_write_reg(sensor, OV2680_REG_SOFT_RESET, 0x01); + if (ret != 0) { + dev_err(dev, "sensor soft reset failed\n"); + return ret; + } + usleep_range(1000, 2000); + } else { + + ov2680_power_down(sensor); + ov2680_power_up(sensor); + } + + ret = clk_prepare_enable(sensor->xvclk); + if (ret < 0) + return ret; + + ret = ov2680_mode_restore(sensor); + if (ret < 0) + goto disable; + + sensor->is_enabled = true; + + /* Set clock lane into LP-11 state */ + ov2680_stream_enable(sensor); + usleep_range(1000, 2000); + ov2680_stream_disable(sensor); + + return 0; + +disable: + dev_err(dev, "failed to enable sensor: %d\n", ret); + ov2680_power_off(sensor); + + return ret; +} + +static int ov2680_s_power(struct v4l2_subdev *sd, int on) +{ + struct ov2680_dev *sensor = to_ov2680_dev(sd); + int ret = 0; + + mutex_lock(&sensor->lock); + + if (on) + ret = ov2680_power_on(sensor); + else + ret = ov2680_power_off(sensor); + + mutex_unlock(&sensor->lock); + + if (on && ret == 0) { + ret = v4l2_ctrl_handler_setup(&sensor->ctrls.handler); + if (ret < 0) + return ret; + } + + return ret; +} + +static int ov2680_s_g_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_frame_interval *fi) +{ + struct ov2680_dev *sensor = to_ov2680_dev(sd); + + mutex_lock(&sensor->lock); + fi->interval = sensor->frame_interval; + mutex_unlock(&sensor->lock); + + return 0; +} + +static int ov2680_s_stream(struct v4l2_subdev *sd, int enable) +{ + struct ov2680_dev *sensor = to_ov2680_dev(sd); + int ret = 0; + + mutex_lock(&sensor->lock); + + if (sensor->is_streaming == !!enable) + goto unlock; + + if (enable && sensor->mode_pending_changes) { + ret = ov2680_mode_set(sensor); + if (ret < 0) + goto unlock; + } + + if (enable) + ret = ov2680_stream_enable(sensor); + else + ret = ov2680_stream_disable(sensor); + + sensor->is_streaming = !!enable; + +unlock: + mutex_unlock(&sensor->lock); + + return ret; +} + +static int ov2680_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_mbus_code_enum *code) +{ + struct ov2680_dev *sensor = to_ov2680_dev(sd); + + if (code->pad != 0 || code->index != 0) + return -EINVAL; + + code->code = sensor->fmt.code; + + return 0; +} + +static int ov2680_get_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *format) +{ + struct ov2680_dev *sensor = to_ov2680_dev(sd); + struct v4l2_mbus_framefmt *fmt; + + if (format->pad != 0) + return -EINVAL; + + mutex_lock(&sensor->lock); + + if (format->which == V4L2_SUBDEV_FORMAT_TRY) + fmt = v4l2_subdev_get_try_format(&sensor->sd, cfg, format->pad); + else + fmt = &sensor->fmt; + + format->format = *fmt; + + mutex_unlock(&sensor->lock); + + return 0; +} + +static int ov2680_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *format) +{ + struct ov2680_dev *sensor = to_ov2680_dev(sd); + struct v4l2_mbus_framefmt *fmt = &format->format; + const struct ov2680_mode_info *mode; + int ret = 0; + + if (format->pad != 0) + return -EINVAL; + + mutex_lock(&sensor->lock); + + if (sensor->is_streaming) { + ret = -EBUSY; + goto unlock; + } + + mode = v4l2_find_nearest_size(ov2680_mode_data, + ARRAY_SIZE(ov2680_mode_data), width, + height, fmt->width, fmt->height); + if (!mode) { + ret = -EINVAL; + goto unlock; + } + + if (format->which == V4L2_SUBDEV_FORMAT_TRY) { + fmt = v4l2_subdev_get_try_format(sd, cfg, 0); + + *fmt = format->format; + goto unlock; + } + + fmt->width = mode->width; + fmt->height = mode->height; + fmt->code = sensor->fmt.code; + fmt->colorspace = sensor->fmt.colorspace; + + sensor->current_mode = mode; + sensor->fmt = format->format; + sensor->mode_pending_changes = true; + +unlock: + mutex_unlock(&sensor->lock); + + return ret; +} + +static int ov2680_enum_frame_size(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_frame_size_enum *fse) +{ + int index = fse->index; + + if (index >= OV2680_MODE_MAX) + return -EINVAL; + + fse->min_width = ov2680_mode_data[index].width; + fse->min_height = ov2680_mode_data[index].height; + fse->max_width = ov2680_mode_data[index].width; + fse->max_height = ov2680_mode_data[index].height; + + return 0; +} + +static int ov2680_enum_frame_interval(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_frame_interval_enum *fie) +{ + struct v4l2_fract tpf; + + tpf.denominator = OV2680_FRAME_RATE; + tpf.numerator = 1; + + fie->interval = tpf; + + return 0; +} + +static int ov2680_g_volatile_ctrl(struct v4l2_ctrl *ctrl) +{ + struct v4l2_subdev *sd = ctrl_to_sd(ctrl); + struct ov2680_dev *sensor = to_ov2680_dev(sd); + int val; + + if (!sensor->is_enabled) + return 0; + + switch (ctrl->id) { + case V4L2_CID_AUTOGAIN: + if (!ctrl->val) + return 0; + val = ov2680_gain_get(sensor); + if (val < 0) + return val; + sensor->ctrls.gain->val = val; + break; + case V4L2_CID_EXPOSURE_AUTO: + if (ctrl->val == V4L2_EXPOSURE_MANUAL) + return 0; + val = ov2680_exposure_get(sensor); + if (val < 0) + return val; + sensor->ctrls.exposure->val = val; + break; + } + + return 0; +} + +static int ov2680_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct v4l2_subdev *sd = ctrl_to_sd(ctrl); + struct ov2680_dev *sensor = to_ov2680_dev(sd); + + if (!sensor->is_enabled) + return 0; + + switch (ctrl->id) { + case V4L2_CID_AUTOGAIN: + return ov2680_gain_set(sensor, !!ctrl->val); + case V4L2_CID_EXPOSURE_AUTO: + return ov2680_exposure_set(sensor, !!ctrl->val); + case V4L2_CID_VFLIP: + if (ctrl->val) + return ov2680_vflip_enable(sensor); + else + return ov2680_vflip_disable(sensor); + case V4L2_CID_HFLIP: + if (ctrl->val) + return ov2680_hflip_enable(sensor); + else + return ov2680_hflip_disable(sensor); + case V4L2_CID_TEST_PATTERN: + return ov2680_test_pattern_set(sensor, ctrl->val); + default: + break; + } + + return -EINVAL; +} + +static const struct v4l2_ctrl_ops ov2680_ctrl_ops = { + .g_volatile_ctrl = ov2680_g_volatile_ctrl, + .s_ctrl = ov2680_s_ctrl, +}; + +static const struct v4l2_subdev_core_ops ov2680_core_ops = { + .s_power = ov2680_s_power, +}; + +static const struct v4l2_subdev_video_ops ov2680_video_ops = { + .g_frame_interval = ov2680_s_g_frame_interval, + .s_frame_interval = ov2680_s_g_frame_interval, + .s_stream = ov2680_s_stream, +}; + +static const struct v4l2_subdev_pad_ops ov2680_pad_ops = { + .enum_mbus_code = ov2680_enum_mbus_code, + .get_fmt = ov2680_get_fmt, + .set_fmt = ov2680_set_fmt, + .enum_frame_size = ov2680_enum_frame_size, + .enum_frame_interval = ov2680_enum_frame_interval, +}; + +static const struct v4l2_subdev_ops ov2680_subdev_ops = { + .core = &ov2680_core_ops, + .video = &ov2680_video_ops, + .pad = &ov2680_pad_ops, +}; + +static int ov2680_mode_init(struct ov2680_dev *sensor) +{ + const struct ov2680_mode_info *init_mode; + + /* set initial mode */ + sensor->fmt.code = MEDIA_BUS_FMT_SBGGR10_1X10; + sensor->fmt.width = 800; + sensor->fmt.height = 600; + sensor->fmt.field = V4L2_FIELD_NONE; + sensor->fmt.colorspace = V4L2_COLORSPACE_SRGB; + + sensor->frame_interval.denominator = OV2680_FRAME_RATE; + sensor->frame_interval.numerator = 1; + + init_mode = &ov2680_mode_init_data; + + sensor->current_mode = init_mode; + + sensor->mode_pending_changes = true; + + return 0; +} + +static int ov2680_v4l2_init(struct ov2680_dev *sensor) +{ + const struct v4l2_ctrl_ops *ops = &ov2680_ctrl_ops; + struct ov2680_ctrls *ctrls = &sensor->ctrls; + struct v4l2_ctrl_handler *hdl = &ctrls->handler; + int ret = 0; + + v4l2_i2c_subdev_init(&sensor->sd, sensor->i2c_client, + &ov2680_subdev_ops); + + sensor->sd.flags = V4L2_SUBDEV_FL_HAS_DEVNODE; + sensor->pad.flags = MEDIA_PAD_FL_SOURCE; + sensor->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; + + ret = media_entity_pads_init(&sensor->sd.entity, 1, &sensor->pad); + if (ret < 0) + return ret; + + v4l2_ctrl_handler_init(hdl, 32); + + hdl->lock = &sensor->lock; + + ctrls->vflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_VFLIP, 0, 1, 1, 0); + ctrls->hflip = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HFLIP, 0, 1, 1, 0); + + ctrls->test_pattern = v4l2_ctrl_new_std_menu_items(hdl, + &ov2680_ctrl_ops, + V4L2_CID_TEST_PATTERN, + ARRAY_SIZE(test_pattern_menu) - 1, + 0, 0, test_pattern_menu); + + ctrls->auto_exp = v4l2_ctrl_new_std_menu(hdl, ops, + V4L2_CID_EXPOSURE_AUTO, + V4L2_EXPOSURE_MANUAL, 0, + V4L2_EXPOSURE_AUTO); + + ctrls->exposure = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_EXPOSURE, + 0, 32767, 1, 0); + + ctrls->auto_gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_AUTOGAIN, + 0, 1, 1, 1); + ctrls->gain = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_GAIN, 0, 2047, 1, 0); + + if (hdl->error) { + ret = hdl->error; + goto cleanup_entity; + } + + ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE; + ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE; + + v4l2_ctrl_auto_cluster(2, &ctrls->auto_gain, 0, true); + v4l2_ctrl_auto_cluster(2, &ctrls->auto_exp, 1, true); + + sensor->sd.ctrl_handler = hdl; + + ret = v4l2_async_register_subdev(&sensor->sd); + if (ret < 0) + goto cleanup_entity; + + return 0; + +cleanup_entity: + media_entity_cleanup(&sensor->sd.entity); + v4l2_ctrl_handler_free(hdl); + + return ret; +} + +static int ov2680_check_id(struct ov2680_dev *sensor) +{ + struct device *dev = ov2680_to_dev(sensor); + u32 chip_id; + int ret; + + ov2680_power_on(sensor); + + ret = ov2680_read_reg16(sensor, OV2680_REG_CHIP_ID_HIGH, &chip_id); + if (ret < 0) { + dev_err(dev, "failed to read chip id high\n"); + return -ENODEV; + } + + if (chip_id != OV2680_CHIP_ID) { + dev_err(dev, "chip id: 0x%04x does not match expected 0x%04x\n", + chip_id, OV2680_CHIP_ID); + return -ENODEV; + } + + return 0; +} + +static int ov2860_parse_dt(struct ov2680_dev *sensor) +{ + struct device *dev = ov2680_to_dev(sensor); + int ret; + + sensor->pwdn_gpio = devm_gpiod_get_optional(dev, "powerdown", + GPIOD_OUT_HIGH); + ret = PTR_ERR_OR_ZERO(sensor->pwdn_gpio); + if (ret < 0) { + dev_dbg(dev, "error while getting powerdown gpio: %d\n", ret); + return ret; + } + + sensor->xvclk = devm_clk_get(dev, "xvclk"); + if (IS_ERR(sensor->xvclk)) { + dev_err(dev, "xvclk clock missing or invalid\n"); + return PTR_ERR(sensor->xvclk); + } + + sensor->xvclk_freq = clk_get_rate(sensor->xvclk); + if (sensor->xvclk_freq < OV2680_XVCLK_MIN || + sensor->xvclk_freq > OV2680_XVCLK_MAX) { + dev_err(dev, "xvclk frequency out of range: %d Hz\n", + sensor->xvclk_freq); + return -EINVAL; + } + + return 0; +} + +static int ov2680_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct ov2680_dev *sensor; + int ret; + + sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL); + if (!sensor) + return -ENOMEM; + + sensor->i2c_client = client; + + ret = ov2860_parse_dt(sensor); + if (ret < 0) + return -EINVAL; + + ret = ov2680_mode_init(sensor); + if (ret < 0) + return ret; + + mutex_init(&sensor->lock); + + ret = ov2680_v4l2_init(sensor); + if (ret < 0) + goto lock_destroy; + + ret = ov2680_check_id(sensor); + if (ret < 0) + goto lock_destroy; + + dev_info(dev, "ov2680 init correctly\n"); + + return 0; + +lock_destroy: + mutex_destroy(&sensor->lock); + + return ret; +} + +static int ov2680_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov2680_dev *sensor = to_ov2680_dev(sd); + + v4l2_async_unregister_subdev(&sensor->sd); + mutex_destroy(&sensor->lock); + media_entity_cleanup(&sensor->sd.entity); + v4l2_ctrl_handler_free(&sensor->ctrls.handler); + + return 0; +} + +static int __maybe_unused ov2680_suspend(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov2680_dev *sensor = to_ov2680_dev(sd); + + if (sensor->is_streaming) + ov2680_stream_disable(sensor); + + return 0; +} + +static int __maybe_unused ov2680_resume(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct ov2680_dev *sensor = to_ov2680_dev(sd); + int ret; + + if (sensor->is_streaming) { + ret = ov2680_stream_enable(sensor); + if (ret < 0) + goto stream_disable; + } + + return 0; + +stream_disable: + ov2680_stream_disable(sensor); + sensor->is_streaming = false; + + return ret; +} + +static const struct dev_pm_ops ov2680_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(ov2680_suspend, ov2680_resume) +}; + +static const struct i2c_device_id ov2680_id[] = { + {"ov2680", 0}, + { }, +}; +MODULE_DEVICE_TABLE(i2c, ov2680_id); + +static const struct of_device_id ov2680_dt_ids[] = { + { .compatible = "ovti,ov2680" }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, ov2680_dt_ids); + +static struct i2c_driver ov2680_i2c_driver = { + .driver = { + .name = "ovti,ov2680", + .of_match_table = ov2680_dt_ids, + }, + .id_table = ov2680_id, + .probe = ov2680_probe, + .remove = ov2680_remove, +}; +module_i2c_driver(ov2680_i2c_driver); + +MODULE_AUTHOR("Rui Miguel Silva "); +MODULE_DESCRIPTION("OV2680 CMOS Image Sensor driver"); +MODULE_LICENSE("GPL v2");