From patchwork Fri Oct 25 17:51:18 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 11212803 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7323D139A for ; Fri, 25 Oct 2019 17:51:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2F8F121D7F for ; Fri, 25 Oct 2019 17:51:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="mauowkdG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727685AbfJYRvs (ORCPT ); Fri, 25 Oct 2019 13:51:48 -0400 Received: from mail-pl1-f195.google.com ([209.85.214.195]:44095 "EHLO mail-pl1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727281AbfJYRvs (ORCPT ); Fri, 25 Oct 2019 13:51:48 -0400 Received: by mail-pl1-f195.google.com with SMTP id q16so1370599pll.11 for ; Fri, 25 Oct 2019 10:51:47 -0700 (PDT) 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=MrqPthDj/gbHOdTo01H42pqw2nOgu+0PlOvg23rriaI=; b=mauowkdGaJ6piaWHBaZlkXpSZzlWiGoGtV6bZXI/9Df7gGHrahmhfuUlgJs+ZffxUU 22aSICOuLMePHP1uXlnverzEtmvP+zckpvkOCS9ypqaEMBYk+Io+qDh9nhe0gTK7nG7d 62PrigJCX0yEUIA8zx55vGj47VvZy0rBPUwMb2xvn+V4gEj+QvqSJ/lrzSTlfEmJ3tTr 0y2K8k6CsrxOJUEWZX7ddY4UrcEb1JAP22Mx/vj6dIXdnrlLrRTR3UtaWcXCXCQGfntZ 2OEqA/YqCq+PAhHmRgru6NyMnlfF7Srv0zqe51gS9ktCLieT4YjkuppmKDL9wMvVBWsX HgRQ== 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=MrqPthDj/gbHOdTo01H42pqw2nOgu+0PlOvg23rriaI=; b=MBSQGzpBnBdXFi/l59hRnnOVUiF5ing+e6CQ+rZQ+zfx8wLCqWUoJvx8AktE3eDh3k R3UhUd96eo6sIM6CcCLslKEaCsJSMTXweuOmKak1jtLounVaNtXE/fcYvhAEmuK7Rquy CxPiQJYCS4hqE6OnrrWZL3fAUlEAS5iLKQ0IaN/B872vU1twhAG/RRer0tgogrcNl5R8 DE1a7JDwtU9PydeOBWzrfNnsTNnJZwUKqDScqpwfXDti6shgSDw+rHxtYL5kA52wMnmg XRRCTIRhjcgtUXhdGlHbytQdCysOsLxeF6ZtABYJyWJbgZeZ8UNq6El9IL8QG67QyGWT znxw== X-Gm-Message-State: APjAAAULJCmpflnaLGulDfYYp17GTLxnqRFIJFKJ3vLqLXiptjm/vNqS NXoDL0T6b+FHg9OBE7M2I3fH X-Google-Smtp-Source: APXvYqzJHj639knhE/VEJHs3tV/EQVHHOebpt/5wDNUoaPrWhOgsOyF50Jj9FjBmnSxl9Bh87U3TmA== X-Received: by 2002:a17:902:547:: with SMTP id 65mr5242666plf.239.1572025906605; Fri, 25 Oct 2019 10:51:46 -0700 (PDT) Received: from localhost.localdomain ([2405:204:7108:7f86:4131:5b00:9fc5:5eaa]) by smtp.gmail.com with ESMTPSA id d14sm3916345pfh.36.2019.10.25.10.51.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Oct 2019 10:51:46 -0700 (PDT) From: Manivannan Sadhasivam To: mchehab@kernel.org, robh+dt@kernel.org, sakari.ailus@iki.fi Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, c.barrett@framos.com, a.brela@framos.com, peter.griffin@linaro.org, Manivannan Sadhasivam Subject: [PATCH v2 2/2] media: i2c: Add IMX296 CMOS image sensor driver Date: Fri, 25 Oct 2019 23:21:18 +0530 Message-Id: <20191025175118.13307-3-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191025175118.13307-1-manivannan.sadhasivam@linaro.org> References: <20191025175118.13307-1-manivannan.sadhasivam@linaro.org> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add driver for Sony IMX296 CMOS image sensor driver. The driver only supports I2C interface for programming and MIPI CSI-2 for sensor output. Signed-off-by: Manivannan Sadhasivam --- MAINTAINERS | 8 + drivers/media/i2c/Kconfig | 11 + drivers/media/i2c/Makefile | 1 + drivers/media/i2c/imx296.c | 733 +++++++++++++++++++++++++++++++++++++ 4 files changed, 753 insertions(+) create mode 100644 drivers/media/i2c/imx296.c diff --git a/MAINTAINERS b/MAINTAINERS index 55199ef7fa74..5b7332d121d8 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15140,6 +15140,14 @@ S: Maintained F: drivers/media/i2c/imx274.c F: Documentation/devicetree/bindings/media/i2c/imx274.txt +SONY IMX296 SENSOR DRIVER +M: Manivannan Sadhasivam +L: linux-media@vger.kernel.org +T: git git://linuxtv.org/media_tree.git +S: Maintained +F: drivers/media/i2c/imx296.c +F: Documentation/devicetree/bindings/media/i2c/imx296.txt + SONY IMX319 SENSOR DRIVER M: Bingbu Cao L: linux-media@vger.kernel.org diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig index 7eee1812bba3..930db46fa2b8 100644 --- a/drivers/media/i2c/Kconfig +++ b/drivers/media/i2c/Kconfig @@ -598,6 +598,17 @@ config VIDEO_IMX274 This is a V4L2 sensor driver for the Sony IMX274 CMOS image sensor. +config VIDEO_IMX296 + tristate "Sony IMX296 sensor support" + depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API + select V4L2_FWNODE + help + This is a Video4Linux2 sensor driver for the Sony + IMX296 camera sensor. + + To compile this driver as a module, choose M here: the + module will be called imx296. + config VIDEO_IMX319 tristate "Sony IMX319 sensor support" depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API diff --git a/drivers/media/i2c/Makefile b/drivers/media/i2c/Makefile index beb170b002dc..ed0c02bda450 100644 --- a/drivers/media/i2c/Makefile +++ b/drivers/media/i2c/Makefile @@ -112,6 +112,7 @@ obj-$(CONFIG_VIDEO_TC358743) += tc358743.o obj-$(CONFIG_VIDEO_IMX214) += imx214.o obj-$(CONFIG_VIDEO_IMX258) += imx258.o obj-$(CONFIG_VIDEO_IMX274) += imx274.o +obj-$(CONFIG_VIDEO_IMX296) += imx296.o obj-$(CONFIG_VIDEO_IMX319) += imx319.o obj-$(CONFIG_VIDEO_IMX355) += imx355.o obj-$(CONFIG_VIDEO_ST_MIPID02) += st-mipid02.o diff --git a/drivers/media/i2c/imx296.c b/drivers/media/i2c/imx296.c new file mode 100644 index 000000000000..98fff0a93277 --- /dev/null +++ b/drivers/media/i2c/imx296.c @@ -0,0 +1,733 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Sony IMX296 CMOS Image Sensor Driver + * + * Copyright (C) 2019 FRAMOS GmbH. + * + * Copyright (C) 2019 Linaro Ltd. + * Author: Manivannan Sadhasivam + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define IMX296_STANDBY 0x3000 +#define IMX296_REGHOLD 0x3008 +#define IMX296_XMSTA 0x300a +#define IMX296_GAIN_LOW 0x3204 +#define IMX296_GAIN_HIGH 0x3205 + +#define IMX296_DEFAULT_FORMAT MEDIA_BUS_FMT_SRGGB10_1X10 + +static const char * const imx296_supply_name[] = { + "vdda", + "vddd", + "vddo", +}; + +#define IMX296_NUM_SUPPLIES ARRAY_SIZE(imx296_supply_name) + +struct imx296_regval { + u16 reg; + u8 val; +}; + +struct imx296_mode { + u32 width; + u32 height; + u32 pixel_rate; + + const struct imx296_regval *data; + u32 data_size; +}; + +struct imx296 { + struct device *dev; + struct clk *mclk; + struct regmap *regmap; + + struct v4l2_subdev sd; + struct v4l2_fwnode_endpoint ep; + struct media_pad pad; + struct v4l2_mbus_framefmt current_format; + const struct imx296_mode *current_mode; + + struct regulator_bulk_data supplies[IMX296_NUM_SUPPLIES]; + struct gpio_desc *rst_gpio; + + struct v4l2_ctrl_handler ctrls; + struct v4l2_ctrl *pixel_rate; + + struct mutex lock; +}; + +static const struct regmap_config imx296_regmap_config = { + .reg_bits = 16, + .val_bits = 8, + .cache_type = REGCACHE_RBTREE, +}; + +static const struct imx296_regval imx296_global_init_settings[] = { + { 0x3a00, 0x80 }, + { 0x3005, 0xf0 }, + { 0x350b, 0x0f }, + { 0x300d, 0x00 }, + { 0x400e, 0x58 }, + { 0x3010, 0x5e }, + { 0x3011, 0x04 }, + { 0x3014, 0x4c }, + { 0x4014, 0x1c }, + { 0x3015, 0x04 }, + { 0x3516, 0x77 }, + { 0x321a, 0x00 }, + { 0x3226, 0x02 }, + { 0x3832, 0xf5 }, + { 0x3833, 0x00 }, + { 0x3541, 0x72 }, + { 0x4041, 0x2a }, + { 0x3d48, 0xa3 }, + { 0x3d49, 0x00 }, + { 0x3d4a, 0x85 }, + { 0x3d4b, 0x00 }, + { 0x3256, 0x01 }, + { 0x3758, 0xa3 }, + { 0x3759, 0x00 }, + { 0x375a, 0x85 }, + { 0x375b, 0x00 }, + { 0x3165, 0x00 }, + { 0x3169, 0x10 }, + { 0x316a, 0x02 }, + { 0x4174, 0x00 }, + { 0x3079, 0x08 }, + { 0x3090, 0x04 }, + { 0x3094, 0x04 }, + { 0x3098, 0x04 }, + { 0x309e, 0x04 }, + { 0x30a0, 0x04 }, + { 0x30a1, 0x3c }, + { 0x38a2, 0xf6 }, + { 0x40a2, 0x06 }, + { 0x38a3, 0x00 }, + { 0x30a4, 0x5f }, + { 0x30a8, 0x91 }, + { 0x30ac, 0x28 }, + { 0x30af, 0x09 }, + { 0x40c1, 0xf6 }, + { 0x40c7, 0x0f }, + { 0x31c8, 0xf3 }, + { 0x40c8, 0x00 }, + { 0x31d0, 0xf4 }, + { 0x30df, 0x00 }, +}; + +static const struct imx296_regval imx296_1440_1088_settings[] = { + { 0x300d, 0x00 }, + { 0x3010, 0xcb }, + { 0x3011, 0x08 }, + { 0x3014, 0x4c }, + { 0x3015, 0x04 }, + { 0x3300, 0x03 }, + { 0x3310, 0x08 }, + { 0x3311, 0x00 }, + { 0x3312, 0x00 }, + { 0x3313, 0x00 }, + { 0x3314, 0xa0 }, + { 0x3315, 0x05 }, + { 0x3316, 0x40 }, + { 0x3317, 0x04 }, + + { 0x3204, 0x00 }, + { 0x3205, 0x00 }, + { 0x3212, 0x08 }, + { 0x3254, 0x3c }, + { 0x3255, 0x00 }, + { 0x3089, 0x80 }, + { 0x308a, 0x0b }, + { 0x308b, 0x80 }, + { 0x308c, 0x08 }, + { 0x418c, 0x74 }, + { 0x308d, 0x0e }, + { 0x308e, 0x00 }, + { 0x308f, 0x00 }, +}; + +/* Mode configs */ +static const struct imx296_mode imx296_modes[] = { + { + .width = 1440, + .height = 1088, + .data = imx296_1440_1088_settings, + .data_size = ARRAY_SIZE(imx296_1440_1088_settings), + .pixel_rate = 80000000, + }, +}; + +static inline struct imx296 *to_imx296(struct v4l2_subdev *_sd) +{ + return container_of(_sd, struct imx296, sd); +} + +static inline int imx296_read_reg(struct imx296 *imx296, u16 addr, u8 *value) +{ + unsigned int regval; + int ret; + + ret = regmap_read(imx296->regmap, addr, ®val); + if (ret) { + dev_err(imx296->dev, "I2C read failed for addr: %x\n", addr); + return ret; + } + + *value = regval & 0xff; + + return 0; +} + +static int imx296_write_reg(struct imx296 *imx296, u16 addr, u8 value) +{ + int ret; + + ret = regmap_write(imx296->regmap, addr, value); + if (ret) { + dev_err(imx296->dev, "I2C write failed for addr: %x\n", addr); + return ret; + } + + return ret; +} + +static int imx296_set_register_array(struct imx296 *imx296, + const struct imx296_regval *settings, + unsigned int num_settings) +{ + unsigned int i; + int ret; + + for (i = 0; i < num_settings; ++i, ++settings) { + ret = imx296_write_reg(imx296, settings->reg, settings->val); + if (ret < 0) + return ret; + + /* Settle time is 10ms for all registers */ + msleep(10); + } + + return 0; +} + +static int imx296_write_buffered_reg(struct imx296 *imx296, u16 address_low, + u8 nr_regs, u32 value) +{ + unsigned int i; + int ret; + + ret = imx296_write_reg(imx296, IMX296_REGHOLD, 0x01); + if (ret) { + dev_err(imx296->dev, "Error setting hold register\n"); + return ret; + } + + for (i = 0; i < nr_regs; i++) { + ret = imx296_write_reg(imx296, address_low + i, + (u8)(value >> (i * 8))); + if (ret) { + dev_err(imx296->dev, "Error writing buffered registers\n"); + return ret; + } + } + + ret = imx296_write_reg(imx296, IMX296_REGHOLD, 0x00); + if (ret) { + dev_err(imx296->dev, "Error setting hold register\n"); + return ret; + } + + return ret; +} + +static int imx296_set_gain(struct imx296 *imx296, u32 value) +{ + int ret; + + ret = imx296_write_buffered_reg(imx296, IMX296_GAIN_HIGH, 1, + (u8)((value >> 8) & 0xFF)); + if (ret < 0) + return ret; + + ret = imx296_write_buffered_reg(imx296, IMX296_GAIN_HIGH, 1, + (u8)((value) & 0xFF)); + if (ret < 0) + return ret; + + return 0; +} + +/* Stop streaming */ +static int imx296_stop_streaming(struct imx296 *imx296) +{ + int ret; + + ret = imx296_write_reg(imx296, IMX296_STANDBY, 0x01); + if (ret < 0) + return ret; + + msleep(30); + + return imx296_write_reg(imx296, IMX296_XMSTA, 0x01); +} + +static int imx296_set_ctrl(struct v4l2_ctrl *ctrl) +{ + struct imx296 *imx296 = container_of(ctrl->handler, + struct imx296, ctrls); + int ret = 0; + + /* V4L2 controls values will be applied only when power is already up */ + if (!pm_runtime_get_if_in_use(imx296->dev)) + return 0; + + switch (ctrl->id) { + case V4L2_CID_GAIN: + ret = imx296_set_gain(imx296, ctrl->val); + break; + default: + ret = -EINVAL; + break; + } + + pm_runtime_put(imx296->dev); + + return ret; +} + +static const struct v4l2_ctrl_ops imx296_ctrl_ops = { + .s_ctrl = imx296_set_ctrl, +}; + +static int imx296_enum_mbus_code(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_mbus_code_enum *code) +{ + code->code = IMX296_DEFAULT_FORMAT; + + return 0; +} + +static int imx296_get_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *fmt) +{ + struct imx296 *imx296 = to_imx296(sd); + struct v4l2_mbus_framefmt *framefmt; + + mutex_lock(&imx296->lock); + + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) + framefmt = v4l2_subdev_get_try_format(&imx296->sd, cfg, + fmt->pad); + else + framefmt = &imx296->current_format; + + fmt->format = *framefmt; + + mutex_unlock(&imx296->lock); + + return 0; +} + +static int imx296_set_fmt(struct v4l2_subdev *sd, + struct v4l2_subdev_pad_config *cfg, + struct v4l2_subdev_format *fmt) +{ + struct imx296 *imx296 = to_imx296(sd); + const struct imx296_mode *mode; + struct v4l2_mbus_framefmt *format; + int ret = 0; + + mutex_lock(&imx296->lock); + + mode = v4l2_find_nearest_size(imx296_modes, + ARRAY_SIZE(imx296_modes), + width, height, + fmt->format.width, fmt->format.height); + + fmt->format.width = mode->width; + fmt->format.height = mode->height; + + fmt->format.code = IMX296_DEFAULT_FORMAT; + fmt->format.field = V4L2_FIELD_NONE; + + if (fmt->which == V4L2_SUBDEV_FORMAT_TRY) { + format = v4l2_subdev_get_try_format(sd, cfg, fmt->pad); + } else { + format = &imx296->current_format; + __v4l2_ctrl_s_ctrl_int64(imx296->pixel_rate, mode->pixel_rate); + + imx296->current_mode = mode; + } + + *format = fmt->format; + + mutex_unlock(&imx296->lock); + + return ret; +} + +static int imx296_entity_init_cfg(struct v4l2_subdev *subdev, + struct v4l2_subdev_pad_config *cfg) +{ + struct v4l2_subdev_format fmt = { 0 }; + + fmt.which = cfg ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE; + fmt.format.width = 1440; + fmt.format.height = 1088; + + imx296_set_fmt(subdev, cfg, &fmt); + + return 0; +} + +/* Start streaming */ +static int imx296_start_streaming(struct imx296 *imx296) +{ + int ret; + + /* Set init register settings */ + ret = imx296_set_register_array(imx296, imx296_global_init_settings, + ARRAY_SIZE(imx296_global_init_settings)); + if (ret < 0) { + dev_err(imx296->dev, "Could not set init registers\n"); + return ret; + } + + /* Apply default values of current mode */ + ret = imx296_set_register_array(imx296, imx296->current_mode->data, + imx296->current_mode->data_size); + if (ret < 0) { + dev_err(imx296->dev, "Could not set current mode\n"); + return ret; + } + + /* Apply customized values from user */ + ret = v4l2_ctrl_handler_setup(imx296->sd.ctrl_handler); + if (ret) { + dev_err(imx296->dev, "Could not sync v4l2 controls\n"); + return ret; + } + + ret = imx296_write_reg(imx296, IMX296_STANDBY, 0x00); + if (ret < 0) + return ret; + + msleep(30); + + /* Start streaming */ + return imx296_write_reg(imx296, IMX296_XMSTA, 0x00); +} + +static int imx296_set_stream(struct v4l2_subdev *sd, int enable) +{ + struct imx296 *imx296 = to_imx296(sd); + int ret; + + if (enable) { + ret = pm_runtime_get_sync(imx296->dev); + if (ret < 0) { + pm_runtime_put_noidle(imx296->dev); + return ret; + } + + ret = imx296_start_streaming(imx296); + if (ret) { + dev_err(imx296->dev, "Start stream failed\n"); + pm_runtime_put(imx296->dev); + return ret; + } + } else { + imx296_stop_streaming(imx296); + pm_runtime_put(imx296->dev); + } + + return 0; +} + +static int imx296_get_regulators(struct device *dev, struct imx296 *imx296) +{ + unsigned int i; + + for (i = 0; i < IMX296_NUM_SUPPLIES; i++) + imx296->supplies[i].supply = imx296_supply_name[i]; + + return devm_regulator_bulk_get(dev, IMX296_NUM_SUPPLIES, + imx296->supplies); +} + +static int imx296_power_on(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct imx296 *imx296 = to_imx296(sd); + int ret; + + ret = regulator_bulk_enable(IMX296_NUM_SUPPLIES, imx296->supplies); + if (ret) { + dev_err(imx296->dev, "Failed to enable regulators\n"); + return ret; + } + + usleep_range(1, 2); + + gpiod_set_value_cansleep(imx296->rst_gpio, 1); + + usleep_range(1, 2); + + ret = clk_prepare_enable(imx296->mclk); + if (ret) { + dev_err(imx296->dev, "Failed to enable clock\n"); + return ret; + } + + usleep_range(30000, 31000); + + return 0; +} + +static int imx296_power_off(struct device *dev) +{ + struct i2c_client *client = to_i2c_client(dev); + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct imx296 *imx296 = to_imx296(sd); + + clk_disable_unprepare(imx296->mclk); + gpiod_set_value_cansleep(imx296->rst_gpio, 0); + regulator_bulk_disable(IMX296_NUM_SUPPLIES, imx296->supplies); + + return 0; +} + +static const struct dev_pm_ops imx296_pm_ops = { + SET_RUNTIME_PM_OPS(imx296_power_on, imx296_power_off, NULL) +}; + +static const struct v4l2_subdev_video_ops imx296_video_ops = { + .s_stream = imx296_set_stream, +}; + +static const struct v4l2_subdev_pad_ops imx296_pad_ops = { + .init_cfg = imx296_entity_init_cfg, + .enum_mbus_code = imx296_enum_mbus_code, + .get_fmt = imx296_get_fmt, + .set_fmt = imx296_set_fmt, +}; + +static const struct v4l2_subdev_ops imx296_subdev_ops = { + .video = &imx296_video_ops, + .pad = &imx296_pad_ops, +}; + +static const struct media_entity_operations imx296_subdev_entity_ops = { + .link_validate = v4l2_subdev_link_validate, +}; + +static int imx296_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct fwnode_handle *endpoint; + struct imx296 *imx296; + u32 mclk_freq; + int ret; + + imx296 = devm_kzalloc(dev, sizeof(*imx296), GFP_KERNEL); + if (!imx296) + return -ENOMEM; + + imx296->dev = dev; + imx296->regmap = devm_regmap_init_i2c(client, &imx296_regmap_config); + if (IS_ERR(imx296->regmap)) { + dev_err(dev, "Unable to initialize I2C\n"); + return -ENODEV; + } + + endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL); + if (!endpoint) { + dev_err(dev, "Endpoint node not found\n"); + return -EINVAL; + } + + ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &imx296->ep); + fwnode_handle_put(endpoint); + if (ret) { + dev_err(dev, "Parsing endpoint node failed\n"); + goto free_err; + } + + /* Only CSI2 is supported for now */ + if (imx296->ep.bus_type != V4L2_MBUS_CSI2_DPHY) { + dev_err(dev, "Unsupported bus type, should be CSI2\n"); + ret = -EINVAL; + goto free_err; + } + + /* Set default mode to max resolution */ + imx296->current_mode = &imx296_modes[0]; + + /* get system clock (mclk) */ + imx296->mclk = devm_clk_get(dev, "mclk"); + if (IS_ERR(imx296->mclk)) { + dev_err(dev, "Could not get mclk"); + ret = PTR_ERR(imx296->mclk); + goto free_err; + } + + ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency", + &mclk_freq); + if (ret) { + dev_err(dev, "Could not get mclk frequency\n"); + goto free_err; + } + + /* external clock must be 37.125 MHz */ + if (mclk_freq != 37125000) { + dev_err(dev, "External clock frequency %u is not supported\n", + mclk_freq); + ret = -EINVAL; + goto free_err; + } + + ret = clk_set_rate(imx296->mclk, mclk_freq); + if (ret) { + dev_err(dev, "Could not set mclk frequency\n"); + goto free_err; + } + + ret = imx296_get_regulators(dev, imx296); + if (ret < 0) { + dev_err(dev, "Cannot get regulators\n"); + goto free_err; + } + + imx296->rst_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_ASIS); + if (IS_ERR(imx296->rst_gpio)) { + dev_err(dev, "Cannot get reset gpio\n"); + ret = PTR_ERR(imx296->rst_gpio); + goto free_err; + } + + mutex_init(&imx296->lock); + + v4l2_ctrl_handler_init(&imx296->ctrls, 3); + + v4l2_ctrl_new_std(&imx296->ctrls, &imx296_ctrl_ops, + V4L2_CID_GAIN, 0, 72, 1, 0); + + imx296->pixel_rate = v4l2_ctrl_new_std(&imx296->ctrls, &imx296_ctrl_ops, + V4L2_CID_PIXEL_RATE, 1, + INT_MAX, 1, + imx296_modes[0].pixel_rate); + + imx296->sd.ctrl_handler = &imx296->ctrls; + + if (imx296->ctrls.error) { + dev_err(dev, "Control initialization error %d\n", + imx296->ctrls.error); + ret = imx296->ctrls.error; + goto free_ctrl; + } + + v4l2_i2c_subdev_init(&imx296->sd, client, &imx296_subdev_ops); + imx296->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE; + imx296->sd.dev = &client->dev; + imx296->sd.entity.ops = &imx296_subdev_entity_ops; + imx296->sd.entity.function = MEDIA_ENT_F_CAM_SENSOR; + + imx296->pad.flags = MEDIA_PAD_FL_SOURCE; + ret = media_entity_pads_init(&imx296->sd.entity, 1, &imx296->pad); + if (ret < 0) { + dev_err(dev, "Could not register media entity\n"); + goto free_ctrl; + } + + ret = v4l2_async_register_subdev(&imx296->sd); + if (ret < 0) { + dev_err(dev, "Could not register v4l2 device\n"); + goto free_entity; + } + + /* Power on the device to match runtime PM state below */ + ret = imx296_power_on(dev); + if (ret < 0) { + dev_err(dev, "Could not power on the device\n"); + goto free_entity; + } + + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_runtime_idle(dev); + + v4l2_fwnode_endpoint_free(&imx296->ep); + + return 0; + +free_entity: + media_entity_cleanup(&imx296->sd.entity); +free_ctrl: + v4l2_ctrl_handler_free(&imx296->ctrls); + mutex_destroy(&imx296->lock); +free_err: + v4l2_fwnode_endpoint_free(&imx296->ep); + + return ret; +} + +static int imx296_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct imx296 *imx296 = to_imx296(sd); + + v4l2_async_unregister_subdev(sd); + media_entity_cleanup(&sd->entity); + v4l2_ctrl_handler_free(sd->ctrl_handler); + + mutex_destroy(&imx296->lock); + + pm_runtime_disable(imx296->dev); + if (!pm_runtime_status_suspended(imx296->dev)) + imx296_power_off(imx296->dev); + pm_runtime_set_suspended(imx296->dev); + + return 0; +} + +static const struct of_device_id imx296_of_match[] = { + { .compatible = "sony,imx296" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, imx296_of_match); + +static struct i2c_driver imx296_i2c_driver = { + .probe_new = imx296_probe, + .remove = imx296_remove, + .driver = { + .name = "imx296", + .pm = &imx296_pm_ops, + .of_match_table = of_match_ptr(imx296_of_match), + }, +}; + +module_i2c_driver(imx296_i2c_driver); + +MODULE_DESCRIPTION("Sony IMX296 CMOS Image Sensor Driver"); +MODULE_AUTHOR("FRAMOS GmbH"); +MODULE_AUTHOR("Manivannan Sadhasivam "); +MODULE_LICENSE("GPL v2");