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From:   Luis Oliveira <Luis.Oliveira@synopsys.com>
To:     linux-media@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     Joao.Pinto@synopsys.com, festevam@gmail.com,
        Luis Oliveira <Luis.Oliveira@synopsys.com>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Luis Oliveira <luis.oliveira@synopsys.com>,
        Hans Verkuil <hans.verkuil@cisco.com>,
        Geert Uytterhoeven <geert+renesas@glider.be>,
        Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Jacob Chen <jacob-chen@iotwrt.com>,
        Neil Armstrong <narmstrong@baylibre.com>,
        Keiichi Watanabe <keiichiw@chromium.org>,
        Kate Stewart <kstewart@linuxfoundation.org>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Todor Tomov <todor.tomov@linaro.org>
Subject: [V2, 3/5] media: platform: dwc: Add DW MIPI DPHY Rx platform
Date:   Thu, 20 Sep 2018 13:16:41 +0200
Message-Id: <20180920111648.27000-4-lolivei@synopsys.com>
In-Reply-To: <20180920111648.27000-1-lolivei@synopsys.com>
References: <20180920111648.27000-1-lolivei@synopsys.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Add of Synopsys MIPI D-PHY in RX mode support.
Separated in the implementation are platform dependent probing functions.

Signed-off-by: Luis Oliveira <lolivei@synopsys.com>
---
Changelog
v2:
- fix uninitialization warning
- fix SDPX License to match: Documentation/process/license-rules.rst

 drivers/media/platform/dwc/Kconfig        |  32 ++
 drivers/media/platform/dwc/Makefile       |   2 +
 drivers/media/platform/dwc/dw-dphy-plat.c | 365 ++++++++++++++++++
 drivers/media/platform/dwc/dw-dphy-rx.c   | 594 ++++++++++++++++++++++++++++++
 drivers/media/platform/dwc/dw-dphy-rx.h   | 176 +++++++++
 5 files changed, 1169 insertions(+)
 create mode 100644 drivers/media/platform/dwc/dw-dphy-plat.c
 create mode 100644 drivers/media/platform/dwc/dw-dphy-rx.c
 create mode 100644 drivers/media/platform/dwc/dw-dphy-rx.h

diff --git a/drivers/media/platform/dwc/Kconfig b/drivers/media/platform/dwc/Kconfig
index e69de29..a573297 100644
--- a/drivers/media/platform/dwc/Kconfig
+++ b/drivers/media/platform/dwc/Kconfig
@@ -0,0 +1,32 @@
+#
+#  Synopsys DWC Platform drivers
+#	Most drivers here are currently for MIPI CSI-2 and MIPI DPHY support
+
+config DWC_MIPI_CSI2_HOST
+	bool "Synopsys Designware CSI-2 Host Controller and DPHY-RX support"
+	select VIDEO_DEV
+	select VIDEO_V4L2
+	select VIDEO_V4L2_SUBDEV_API
+	select VIDEOBUF2_VMALLOC
+	select VIDEOBUF2_DMA_CONTIG
+	select GENERIC_PHY
+	select VIDEO_OV5647
+	help
+	 This selects the CSI-2 host controller support.
+
+	 If you have a controller with this interface, say Y.
+
+	  If unsure, say N.
+
+if DWC_MIPI_CSI2_HOST
+
+config DWC_MIPI_TC_DPHY_G128
+	tristate "DesignWare platform support using a G128 Test Chip"
+	depends on DWC_MIPI_CSI2_HOST
+	help
+	 Synopsys Test Chip is a MIPI D-PHY for prototyping purposes.
+
+	  If unsure, say N.
+
+endif # DWC_MIPI_CSI2_HOST
+
diff --git a/drivers/media/platform/dwc/Makefile b/drivers/media/platform/dwc/Makefile
index e69de29..8be6f68 100644
--- a/drivers/media/platform/dwc/Makefile
+++ b/drivers/media/platform/dwc/Makefile
@@ -0,0 +1,2 @@
+obj-$(CONFIG_DWC_MIPI_TC_DPHY_G128)	+= dw-dphy-platfrm.o
+dw-dphy-platfrm-objs	:= dw-dphy-plat.o dw-dphy-rx.o
diff --git a/drivers/media/platform/dwc/dw-dphy-plat.c b/drivers/media/platform/dwc/dw-dphy-plat.c
new file mode 100644
index 0000000..8e298f5
--- /dev/null
+++ b/drivers/media/platform/dwc/dw-dphy-plat.c
@@ -0,0 +1,365 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * dw-dphy-plat.c
+ *
+ * Copyright(c) 2018-present, Synopsys, Inc. and/or its affiliates.
+ * Luis Oliveira <Luis.Oliveira@synopsys.com>
+ *
+ */
+
+#include "dw-dphy-rx.h"
+
+static struct phy *dw_dphy_xlate(struct device *dev,
+			struct of_phandle_args *args)
+{
+	struct dw_dphy_rx *dphy = dev_get_drvdata(dev);
+
+	return dphy->phy;
+}
+
+static ssize_t dphy_reset_show(struct device *dev,
+			struct device_attribute *attr,
+			char *buf)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dw_dphy_rx *dphy = platform_get_drvdata(pdev);
+	char buffer[15];
+
+	dw_dphy_write(dphy, R_CSI2_DPHY_RSTZ, 0);
+	usleep_range(100, 200);
+	dw_dphy_write(dphy, R_CSI2_DPHY_RSTZ, 1);
+
+	return strlcpy(buf, buffer, PAGE_SIZE);
+}
+
+static ssize_t dphy_freq_store(struct device *dev,
+			struct device_attribute *attr,
+			const char *buf,
+			size_t count)
+{
+	int ret;
+	unsigned long freq;
+
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dw_dphy_rx *dphy = platform_get_drvdata(pdev);
+
+	ret = kstrtoul(buf, 10, &freq);
+	if (ret < 0)
+		return ret;
+
+	if (freq > 2500) {
+		dev_info(dev, "Freq must be under 2500 Mhz\n");
+		return count;
+	}
+	if (freq < 80) {
+		dev_info(dev, "Freq must be over 80 Mhz\n");
+		return count;
+	}
+
+	dev_info(dev, "Data Rate %lu Mbps\n", freq);
+	dphy->dphy_freq = freq * 1000;
+
+	return count;
+
+}
+
+static ssize_t dphy_freq_show(struct device *dev,
+			struct device_attribute *attr,
+			char *buf)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dw_dphy_rx *dphy = platform_get_drvdata(pdev);
+	char buffer[15];
+
+	snprintf(buffer, 15, "Freq %d\n", dphy->dphy_freq / 1000);
+
+	return strlcpy(buf, buffer, PAGE_SIZE);
+}
+
+static ssize_t dphy_addr_store(struct device *dev,
+		struct device_attribute *attr,
+		const char *buf,
+		size_t count)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dw_dphy_rx *dphy = platform_get_drvdata(pdev);
+	unsigned long val;
+	int ret;
+	u8 addr, payload;
+
+	ret = kstrtoul(buf, 32, &val);
+	if (ret < 0)
+		return ret;
+
+	payload = (u16)val;
+	addr = (u16)(val >> 16);
+
+	dev_info(dev, "addr 0x%lX\n", val);
+	dev_info(dev, "payload: 0x%X\n", addr);
+
+	dev_info(dev,
+		"Addr [0x%x] -> 0x%x\n", (unsigned int)addr,
+		dw_dphy_te_read(dphy, addr));
+
+	return count;
+}
+
+static ssize_t idelay_show(struct device *dev,
+		struct device_attribute *attr,
+		char *buf)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dw_dphy_rx *dphy = platform_get_drvdata(pdev);
+	char buffer[15];
+
+	snprintf(buffer, 15, "idelay %d\n", dw_dphy_if_get_idelay(dphy));
+
+	return strlcpy(buf, buffer, PAGE_SIZE);
+}
+
+static ssize_t idelay_store(struct device *dev,
+		struct device_attribute *attr,
+		const char *buf,
+		size_t count)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dw_dphy_rx *dphy = platform_get_drvdata(pdev);
+	int ret;
+	unsigned long val;
+	u8 lane, delay;
+
+	ret = kstrtoul(buf, 16, &val);
+	if (ret < 0)
+		return ret;
+
+	lane = (u8)val;
+	delay = (u8)(val >> 8);
+
+	dev_dbg(dev, "Lanes %u\n", lane);
+	dev_dbg(dev, "Delay %u\n", delay);
+
+	dw_dphy_if_set_idelay_lane(dphy, delay, lane);
+
+	return count;
+}
+
+static ssize_t len_config_store(struct device *dev,
+				struct device_attribute *attr,
+				const char *buf, size_t count)
+{
+	int ret;
+	unsigned long length;
+
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dw_dphy_rx *dphy = platform_get_drvdata(pdev);
+
+	ret = kstrtoul(buf, 10, &length);
+	if (ret < 0)
+		return ret;
+
+	if (length == BIT8)
+		pr_info("Configured for 8-bit interface\n");
+	else if (length == BIT12)
+		pr_info("Configured for 12-bit interface\n");
+	else
+		return count;
+
+	dphy->dphy_te_len = length;
+
+	return count;
+
+}
+
+static ssize_t len_config_show(struct device *dev,
+		struct device_attribute *attr,
+		char *buf)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dw_dphy_rx *dphy = platform_get_drvdata(pdev);
+	char buffer[20];
+
+	snprintf(buffer, 20, "Length %d\n", dphy->dphy_te_len);
+
+	return strlcpy(buf, buffer, PAGE_SIZE);
+}
+
+static ssize_t dw_dphy_g118_settle_store(struct device *dev,
+		struct device_attribute *attr,
+		const char *buf,
+		size_t count)
+{
+	int ret;
+	unsigned long lp_time;
+
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dw_dphy_rx *dphy = platform_get_drvdata(pdev);
+
+	ret = kstrtoul(buf, 10, &lp_time);
+	if (ret < 0)
+		return ret;
+
+	if ((lp_time > 1) && (lp_time < 10000))
+		dphy->lp_time = lp_time;
+	else {
+		pr_info("Invalid Value configuring for 1000 ns\n");
+		dphy->lp_time = 1000;
+	}
+
+	dphy->lp_time = lp_time;
+
+	return count;
+
+}
+
+static ssize_t dw_dphy_g118_settle_show(struct device *dev,
+		struct device_attribute *attr,
+		char *buf)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct dw_dphy_rx *dphy = platform_get_drvdata(pdev);
+	char buffer[10];
+
+	snprintf(buffer, 10, "Settle %d ns\n", dphy->lp_time);
+
+	return strlcpy(buf, buffer, PAGE_SIZE);
+}
+
+static DEVICE_ATTR_RO(dphy_reset);
+static DEVICE_ATTR_RW(dphy_freq);
+static DEVICE_ATTR_WO(dphy_addr);
+static DEVICE_ATTR_RW(idelay);
+static DEVICE_ATTR_RW(len_config);
+static DEVICE_ATTR_RW(dw_dphy_g118_settle);
+
+static struct phy_ops dw_dphy_ops = {
+	.init = dw_dphy_init,
+	.reset = dw_dphy_reset,
+	.power_on = dw_dphy_power_on,
+	.power_off = dw_dphy_power_off,
+	.owner = THIS_MODULE,
+};
+
+static int dw_dphy_rx_probe(struct platform_device *pdev)
+{
+	struct dw_dphy_rx *dphy;
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	struct phy_provider *phy_provider;
+	struct phy *phy;
+
+	dphy = devm_kzalloc(dev, sizeof(*dphy), GFP_KERNEL);
+	if (!dphy)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	dphy->base_address = devm_ioremap(dev, res->start, resource_size(res));
+	if (IS_ERR(dphy->base_address)) {
+		dev_err(dev, "error requesting base address\n");
+		return PTR_ERR(dphy->base_address);
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	dphy->dphy1_if_addr = devm_ioremap_resource(dev, res);
+	if (IS_ERR(dphy->dphy1_if_addr)) {
+		dev_err(dev, "error requesting dphy 1 if regbank\n");
+		return PTR_ERR(dphy->dphy1_if_addr);
+	}
+
+	dphy->max_lanes =
+		dw_dphy_if_read_msk(dphy, DPHYID, DPHY_ID_LANE_SUPPORT, 4);
+
+	dphy->dphy_gen = dw_dphy_if_read_msk(dphy, DPHYID, DPHY_ID_GEN, 4);
+	dev_info(dev, "DPHY GEN %s with maximum %s lanes\n",
+			dphy->dphy_gen == GEN3 ? "3" : "2",
+			dphy->max_lanes == CTRL_8_LANES ? "8" : "4");
+
+	if (dphy->max_lanes == CTRL_8_LANES) {
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 2);
+		dphy->dphy2_if_addr =
+			devm_ioremap(dev, res->start, resource_size(res));
+
+		if (IS_ERR(dphy->dphy2_if_addr)) {
+			dev_err(dev, "error requesting dphy 2 if regbank\n");
+			return PTR_ERR(dphy->dphy2_if_addr);
+		}
+
+		dphy->config_gpio = of_get_gpio(dev->of_node, 0);
+		if (!gpio_is_valid(dphy->config_gpio)) {
+			dev_err(dev, "failed to parse config gpio\n");
+			return dphy->config_gpio;
+		}
+	}
+
+	if (of_property_read_u32(dev->of_node,
+			"snps,dphy-frequency",
+			&dphy->dphy_freq)) {
+		dev_err(dev, "failed to find dphy frequency\n");
+		return -EINVAL;
+	}
+
+	if (of_property_read_u32(dev->of_node,
+			"snps,dphy-te-len",
+			&dphy->dphy_te_len)) {
+		dev_err(dev, "failed to find dphy te length\n");
+		return -EINVAL;
+	}
+
+	if (of_property_read_u32(dev->of_node,
+			"snps,compat-mode",
+			&dphy->compat_mode)) {
+		dev_err(dev, "failed to find compat mode\n");
+		return -EINVAL;
+	}
+
+	dev_set_drvdata(dev, dphy);
+	spin_lock_init(&dphy->slock);
+
+	phy = devm_phy_create(dev, NULL, &dw_dphy_ops);
+	if (IS_ERR(phy)) {
+		dev_err(dev, "failed to create PHY\n");
+		return PTR_ERR(phy);
+	}
+
+	dphy->phy = phy;
+	phy_set_drvdata(phy, dphy);
+
+	phy_provider = devm_of_phy_provider_register(dev, dw_dphy_xlate);
+	if (IS_ERR(phy_provider)) {
+		dev_err(dev, "error getting phy provider\n");
+		return PTR_ERR(phy_provider);
+	}
+
+	dphy->lp_time = 1000; /* 1000 ns */
+	dphy->lanes_config = dw_dphy_setup_config(dphy);
+	dev_dbg(dev, "rx-dphy created\n");
+
+	device_create_file(&pdev->dev, &dev_attr_dphy_reset);
+	device_create_file(&pdev->dev, &dev_attr_dphy_freq);
+	device_create_file(&pdev->dev, &dev_attr_dphy_addr);
+	device_create_file(&pdev->dev, &dev_attr_idelay);
+	device_create_file(&pdev->dev, &dev_attr_len_config);
+	device_create_file(&pdev->dev, &dev_attr_dw_dphy_g118_settle);
+
+	return 0;
+}
+
+static const struct of_device_id dw_dphy_rx_of_match[] = {
+	{ .compatible = "snps,dphy-rx" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, dw_dphy_rx_of_match);
+
+static struct platform_driver dw_dphy_rx_driver = {
+	.probe	= dw_dphy_rx_probe,
+	.driver = {
+		.of_match_table	= dw_dphy_rx_of_match,
+		.name  = "snps-dphy-rx",
+		.owner = THIS_MODULE,
+	}
+};
+module_platform_driver(dw_dphy_rx_driver);
+
+MODULE_DESCRIPTION("SNPS MIPI DPHY Rx driver");
+MODULE_AUTHOR("Luis Oliveira <lolivei@synopsys.com>");
+MODULE_LICENSE("GPL v2");
+
diff --git a/drivers/media/platform/dwc/dw-dphy-rx.c b/drivers/media/platform/dwc/dw-dphy-rx.c
new file mode 100644
index 0000000..4100ea5
--- /dev/null
+++ b/drivers/media/platform/dwc/dw-dphy-rx.c
@@ -0,0 +1,594 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Synopsys MIPI D-PHY driver
+ *
+ * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
+ * Author: Luis Oliveira <Luis.Oliveira@synopsys.com>
+ *
+ */
+
+#include "dw-dphy-rx.h"
+
+struct range_dphy_gen2 {
+	u64 freq;
+	u8 hsfregrange;
+};
+
+struct range_dphy_gen2 range_gen2[] = {
+	{  80, 0x00}, {  90, 0x10}, { 100, 0x20},
+	{ 110, 0x30}, { 120, 0x01}, { 130, 0x11},
+	{ 140, 0x21}, { 150, 0x31}, { 160, 0x02},
+	{ 170, 0x12}, { 180, 0x22}, { 190, 0x32},
+	{ 205, 0x03}, { 220, 0x13}, { 235, 0x23},
+	{ 250, 0x33}, { 275, 0x04}, { 300, 0x14},
+	{ 325, 0x05}, { 350, 0x15}, { 400, 0x25},
+	{ 450, 0x06}, { 500, 0x16}, { 550, 0x07},
+	{ 600, 0x17}, { 650, 0x08}, { 700, 0x18},
+	{ 750, 0x09}, { 800, 0x19}, { 850, 0x29},
+	{ 900, 0x39}, { 950, 0x0A}, {1000, 0x1A},
+	{1050, 0x2A}, {1100, 0x3A}, {1150, 0x0B},
+	{1200, 0x1B}, {1250, 0x2B}, {1300, 0x3B},
+	{1350, 0x0C}, {1400, 0x1C}, {1450, 0x2C},
+	{1500, 0x3C}, {1550, 0x0D}, {1600, 0x1D},
+	{1650, 0x2D}, {1700, 0x0E}, {1750, 0x1E},
+	{1800, 0x2E}, {1850, 0x3E}, {1900, 0x0F},
+	{1950, 0x1F}, {2000, 0x2F},
+};
+
+struct range_dphy_gen3 {
+	u64 freq;
+	u8 hsfregrange;
+	u32 osc_freq_target;
+};
+
+struct range_dphy_gen3 range_gen3[] = {
+
+	{  80, 0x00, 0x1B6}, {  90, 0x10, 0x1B6}, { 100, 0x20, 0x1B6},
+	{ 110, 0x30, 0x1B6}, { 120, 0x01, 0x1B6}, { 130, 0x11, 0x1B6},
+	{ 140, 0x21, 0x1B6}, { 150, 0x31, 0x1B6}, { 160, 0x02, 0x1B6},
+	{ 170, 0x12, 0x1B6}, { 180, 0x22, 0x1B6}, { 190, 0x32, 0x1B6},
+	{ 205, 0x03, 0x1B6}, { 220, 0x13, 0x1B6}, { 235, 0x23, 0x1B6},
+	{ 250, 0x33, 0x1B6}, { 275, 0x04, 0x1B6}, { 300, 0x14, 0x1B6},
+	{ 325, 0x25, 0x1B6}, { 350, 0x35, 0x1B6}, { 400, 0x05, 0x1B6},
+	{ 450, 0x16, 0x1B6}, { 500, 0x26, 0x1B6}, { 550, 0x37, 0x1B6},
+	{ 600, 0x07, 0x1B6}, { 650, 0x18, 0x1B6}, { 700, 0x28, 0x1B6},
+	{ 750, 0x39, 0x1B6}, { 800, 0x09, 0x1B6}, { 850, 0x19, 0x1B6},
+	{ 900, 0x29, 0x1B6}, { 950, 0x3A, 0x1B6}, {1000, 0x0A, 0x1B6},
+	{1050, 0x1A, 0x1B6}, {1100, 0x2A, 0x1B6}, {1150, 0x3B, 0x1B6},
+	{1200, 0x0B, 0x1B6}, {1250, 0x1B, 0x1B6}, {1300, 0x2B, 0x1B6},
+	{1350, 0x3C, 0x1B6}, {1400, 0x0C, 0x1B6}, {1450, 0x1C, 0x1B6},
+	{1500, 0x2C, 0x1B6}, {1550, 0x3D, 0x10F}, {1600, 0x0D, 0x118},
+	{1650, 0x1D, 0x121}, {1700, 0x2E, 0x12A}, {1750, 0x3E, 0x132},
+	{1800, 0x0E, 0x13B}, {1850, 0x1E, 0x144}, {1900, 0x2F, 0x14D},
+	{1950, 0x3F, 0x155}, {2000, 0x0F, 0x15E}, {2050, 0x40, 0x167},
+	{2100, 0x41, 0x170}, {2150, 0x42, 0x178}, {2200, 0x43, 0x181},
+	{2250, 0x44, 0x18A}, {2300, 0x45, 0x193}, {2350, 0x46, 0x19B},
+	{2400, 0x47, 0x1A4}, {2450, 0x48, 0x1AD}, {2500, 0x49, 0x1B6}
+};
+
+u8 dw_dphy_setup_config(struct dw_dphy_rx *dphy)
+{
+	u8 ret;
+	int setup_config;
+
+	if (dphy->max_lanes == CTRL_4_LANES)
+		return CTRL_4_LANES;
+
+	ret = gpio_request(dphy->config_gpio, "config");
+	if (ret < 0) {
+		pr_err("could not acquire config gpio (err=%d)\n", ret);
+		return ret;
+	}
+
+	setup_config = gpio_get_value(dphy->config_gpio);
+	pr_debug("CONFIG %s\n", setup_config == CTRL_8_LANES ? "8L" : "4+4L");
+	gpio_free(dphy->config_gpio);
+
+	return setup_config;
+}
+void dw_dphy_if_write(struct dw_dphy_rx *dphy, u32 address, u32 data)
+{
+	iowrite32(data, dphy->dphy1_if_addr + address);
+
+	if (dphy->lanes_config == CTRL_4_LANES)
+		return;
+
+	iowrite32(data, dphy->dphy2_if_addr + address);
+}
+
+u32 dw_dphy_if_read(struct dw_dphy_rx *dphy, u64 address)
+{
+	u32 if1 = 0, if2 = 0;
+
+	if1 = ioread32(dphy->dphy1_if_addr + address);
+
+	if (dphy->lanes_config == CTRL_4_LANES)
+		goto end;
+
+	if (dphy->lanes_config == DPHYID)
+		goto end;
+
+	if2 = ioread32(dphy->dphy2_if_addr + address);
+
+	if (if1 != if2)
+		pr_err("Values read different for each interface\n");
+
+end:
+	return if1;
+}
+
+void dw_dphy_write(struct dw_dphy_rx *dphy, u32 address, u32 data)
+{
+	iowrite32(data, dphy->base_address + address);
+
+	if (dphy->lanes_config == CTRL_4_LANES)
+		return;
+
+	if (address == R_CSI2_DPHY_TST_CTRL0)
+		iowrite32(data, dphy->base_address + R_CSI2_DPHY2_TST_CTRL0);
+	else if (address == R_CSI2_DPHY_TST_CTRL1)
+		iowrite32(data, dphy->base_address + R_CSI2_DPHY2_TST_CTRL1);
+}
+
+u32 dw_dphy_read(struct dw_dphy_rx *dphy, u64 address)
+{
+	u32 dphy1 = 0, dphy2 = 0;
+
+	dphy1 = ioread32(dphy->base_address + address);
+
+	if (dphy->lanes_config == CTRL_4_LANES)
+		goto end;
+
+	if (address == R_CSI2_DPHY_TST_CTRL0)
+		dphy2 = ioread32(dphy->base_address + R_CSI2_DPHY2_TST_CTRL0);
+	else if (address == R_CSI2_DPHY_TST_CTRL1)
+		dphy2 = ioread32(dphy->base_address + R_CSI2_DPHY2_TST_CTRL1);
+	else
+		return -ENODEV;
+
+	if (dphy1 != dphy2)
+		pr_err("Values read different for each dphy\n");
+
+end:
+	return dphy1;
+}
+
+void dw_dphy_write_msk(struct dw_dphy_rx *dev,
+		u64 address, u64 data, u8 shift, u8 width)
+{
+	u32 mask = (1 << width) - 1;
+	u32 temp = dw_dphy_read(dev, address);
+
+	temp &= ~(mask << shift);
+	temp |= (data & mask) << shift;
+	dw_dphy_write(dev, address, temp);
+}
+
+static void dw_dphy_te_12b_write(struct dw_dphy_rx *dphy, u16 addr, u8 data)
+{
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 0, PHY_TESTEN, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 1, PHY_TESTEN, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 1, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 0x00, PHY_TESTDIN, 8);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 0, PHY_TESTEN, 1);
+	dw_dphy_write_msk(dphy,
+		R_CSI2_DPHY_TST_CTRL1, (u8) (addr >> 8), PHY_TESTDIN, 8);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 1, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 1, PHY_TESTEN, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 1, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy,
+		R_CSI2_DPHY_TST_CTRL1, (u8) addr, PHY_TESTDIN, 8);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 0, PHY_TESTEN, 1);
+	dw_dphy_write_msk(dphy,
+		R_CSI2_DPHY_TST_CTRL1, (u8) data, PHY_TESTDIN, 8);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 1, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLK, 1);
+}
+
+static void dw_dphy_te_8b_write(struct dw_dphy_rx *dphy, u8 addr, u8 data)
+{
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 1, PHY_TESTCLK, 1);
+	dw_dphy_write(dphy, R_CSI2_DPHY_TST_CTRL1, addr);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 1, PHY_TESTEN, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 0, PHY_TESTEN, 1);
+	dw_dphy_write(dphy, R_CSI2_DPHY_TST_CTRL1, data);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 1, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLK, 1);
+}
+
+static void dw_dphy_te_write(struct dw_dphy_rx *dphy, u16 addr, u8 data)
+{
+
+	if (dphy->dphy_te_len == BIT12)
+		dw_dphy_te_12b_write(dphy, addr, data);
+	else
+		dw_dphy_te_8b_write(dphy, addr, data);
+}
+
+static int dw_dphy_te_12b_read(struct dw_dphy_rx *dphy, u32 addr)
+{
+	u8 ret;
+
+	dw_dphy_write(dphy, R_CSI2_DPHY_SHUTDOWNZ, 0);
+	dw_dphy_write(dphy, R_CSI2_DPHY_RSTZ, 0);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 0, PHY_TESTEN, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 1, PHY_TESTEN, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 1, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 0x00, PHY_TESTDIN, 8);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 0, PHY_TESTEN, 1);
+	dw_dphy_write_msk(dphy,
+		R_CSI2_DPHY_TST_CTRL1, (u8) (addr >> 8), PHY_TESTDIN, 8);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 1, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 1, PHY_TESTEN, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 1, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy,
+		R_CSI2_DPHY_TST_CTRL1, (u8) addr, PHY_TESTDIN, 8);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 0x00, 0, PHY_TESTDIN);
+	ret = dw_dphy_read_msk(dphy, R_CSI2_DPHY_TST_CTRL1, PHY_TESTDOUT, 8);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 0, PHY_TESTEN, 1);
+	dw_dphy_write(dphy, R_CSI2_DPHY_RSTZ, 1);
+	dw_dphy_write(dphy, R_CSI2_DPHY_SHUTDOWNZ, 1);
+
+	return ret;
+}
+
+static int dw_dphy_te_8b_read(struct dw_dphy_rx *dphy, u32 addr)
+{
+	u8 ret;
+
+	dw_dphy_write(dphy, R_CSI2_DPHY_SHUTDOWNZ, 0);
+	dw_dphy_write(dphy, R_CSI2_DPHY_RSTZ, 0);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 1, PHY_TESTEN, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 1, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, addr, PHY_TESTDIN, 8);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLK, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 0, PHY_TESTEN, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL1, 0, PHY_TESTDIN, 8);
+	ret = dw_dphy_read_msk(dphy, R_CSI2_DPHY_TST_CTRL1, PHY_TESTDOUT, 8);
+	dw_dphy_write(dphy, R_CSI2_DPHY_RSTZ, 1);
+	dw_dphy_write(dphy, R_CSI2_DPHY_SHUTDOWNZ, 1);
+
+	return ret;
+}
+
+int dw_dphy_te_read(struct dw_dphy_rx *dphy, u32 addr)
+{
+	int ret;
+
+	if (dphy->dphy_te_len == BIT12)
+		ret = dw_dphy_te_12b_read(dphy, addr);
+	else
+		ret = dw_dphy_te_8b_read(dphy, addr);
+
+	return ret;
+}
+
+static void dw_dphy_if_init(struct dw_dphy_rx *dphy)
+{
+	dw_dphy_if_write(dphy, DPHYGLUEIFTESTER, RESET);
+	dw_dphy_if_write(dphy, DPHYGLUEIFTESTER, TX_PHY);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 1, PHY_TESTCLR, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLR, 1);
+	dw_dphy_if_write(dphy, DPHYZCALCTRL, 0);
+	dw_dphy_if_write(dphy, DPHYZCALCTRL, 1);
+	dw_dphy_if_write(dphy, DPHYGLUEIFTESTER, RESET);
+	dw_dphy_if_write(dphy, DPHYGLUEIFTESTER, GLUELOGIC);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 1, PHY_TESTCLR, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLR, 1);
+	dw_dphy_if_write(dphy, DPHYZCALCTRL, 0);
+	dw_dphy_if_write(dphy, DPHYZCALCTRL, 1);
+	dw_dphy_if_write(dphy, DPHYGLUEIFTESTER, RESET);
+	dw_dphy_if_write(dphy, DPHYGLUEIFTESTER, RX_PHY);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 1, PHY_TESTCLR, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLR, 1);
+	dw_dphy_if_write(dphy, DPHYZCALCTRL, 0);
+	dw_dphy_if_write(dphy, DPHYZCALCTRL, 1);
+}
+
+static void dw_dphy_gen3_12bit_tc_power_up(struct dw_dphy_rx *dphy)
+{
+	dw_dphy_if_write(dphy, DPHYGLUEIFTESTER, RESET);
+	dw_dphy_if_write(dphy, DPHYGLUEIFTESTER, GLUELOGIC);
+	dw_dphy_te_write(dphy, CFGCLKFREQRANGE_TX, 0x1C);
+
+	/* CLKSEL | UPDATEPLL | SHADOW_CLEAR | SHADOW_CTRL | FORCEPLL */
+	dw_dphy_te_write(dphy, BYPASS, 0x3F);
+
+	/* IO_DS3 | IO_DS2 | IO_DS1 | IO_DS0 */
+	if (dphy->dphy_freq > 1500)
+		dw_dphy_te_write(dphy, IO_DS, 0x0F);
+
+	dw_dphy_if_write(dphy, DPHYGLUEIFTESTER, RESET);
+	dw_dphy_if_write(dphy, DPHYGLUEIFTESTER, RX_PHY);
+}
+
+static void dw_dphy_gen3_8bit_tc_power_up(struct dw_dphy_rx *dphy)
+{
+	u32 input_freq = dphy->dphy_freq / 1000;
+
+	dw_dphy_if_write(dphy, DPHYGLUEIFTESTER, RESET);
+	dw_dphy_if_write(dphy, DPHYGLUEIFTESTER, GLUELOGIC);
+	dw_dphy_te_write(dphy, CFGCLKFREQRANGE_RX, 0x1C);
+	dw_dphy_if_write(dphy, DPHYGLUEIFTESTER, RESET);
+	dw_dphy_if_write(dphy, DPHYGLUEIFTESTER, RX_PHY);
+	dw_dphy_te_write(dphy, OSC_FREQ_TARGET_RX0_MSB, 0x03);
+	dw_dphy_te_write(dphy, OSC_FREQ_TARGET_RX0_LSB, 0x02);
+	dw_dphy_te_write(dphy, OSC_FREQ_TARGET_RX1_MSB, 0x03);
+	dw_dphy_te_write(dphy, OSC_FREQ_TARGET_RX1_LSB, 0x02);
+	dw_dphy_te_write(dphy, OSC_FREQ_TARGET_RX2_MSB, 0x03);
+	dw_dphy_te_write(dphy, OSC_FREQ_TARGET_RX2_LSB, 0x02);
+	dw_dphy_te_write(dphy, OSC_FREQ_TARGET_RX3_MSB, 0x03);
+	dw_dphy_te_write(dphy, OSC_FREQ_TARGET_RX3_LSB, 0x02);
+	dw_dphy_te_write(dphy, BANDGAP_CTRL, 0x80);
+
+	if (input_freq < 2000)
+		dw_dphy_te_write(dphy, HS_RX_CTRL_LANE0, 0xC0);
+
+	if (input_freq < 1000) {
+		dw_dphy_te_write(dphy, HS_RX_CTRL_LANE1, 0xC0);
+		dw_dphy_te_write(dphy, HS_RX_CTRL_LANE2, 0xC0);
+		dw_dphy_te_write(dphy, HS_RX_CTRL_LANE3, 0xC0);
+	}
+}
+
+int dw_dphy_g118_settle(struct dw_dphy_rx *dphy)
+{
+	u32 input_freq, total_settle, settle_time, byte_clk, lp_time;
+
+	lp_time = dphy->lp_time;
+	input_freq = dphy->dphy_freq / 1000;
+
+	settle_time = (8 * (1000000/(input_freq))) + 115000;
+	byte_clk = (8000000/(input_freq));
+	total_settle = (settle_time + lp_time * 1000) / byte_clk;
+
+	if (total_settle > 0xFF)
+		total_settle = 0xFF;
+
+	return total_settle;
+}
+
+static void dw_dphy_pwr_down(struct dw_dphy_rx *dphy)
+{
+	dw_dphy_write(dphy, R_CSI2_DPHY_RSTZ, 0);
+
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLK, 1);
+	if (dphy->lanes_config == CTRL_8_LANES)
+		dw_dphy_write_msk(dphy,
+			R_CSI2_DPHY2_TST_CTRL0, 0, PHY_TESTCLK, 1);
+
+	dw_dphy_write(dphy, R_CSI2_DPHY_SHUTDOWNZ, 0);
+}
+
+static void dw_dphy_pwr_up(struct dw_dphy_rx *dphy)
+{
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 1, PHY_TESTCLK, 1);
+	if (dphy->lanes_config == CTRL_8_LANES)
+		dw_dphy_write_msk(dphy,
+			R_CSI2_DPHY2_TST_CTRL0, 1, PHY_TESTCLK, 1);
+
+	dw_dphy_write(dphy, R_CSI2_DPHY_SHUTDOWNZ, 1);
+	dw_dphy_write(dphy, R_CSI2_DPHY_RSTZ, 1);
+}
+
+static int dw_dphy_gen3_12bit_configure(struct dw_dphy_rx *dphy)
+{
+	u32 input_freq = dphy->dphy_freq;
+	u8 range = 0;
+
+	pr_debug("PHY GEN 3 Freq: %u\n", input_freq);
+	for (range = 0; (range < ARRAY_SIZE(range_gen3) - 1) &&
+		((input_freq / 1000) > range_gen3[range].freq); range++)
+		;
+
+	dw_dphy_gen3_12bit_tc_power_up(dphy);
+
+	dw_dphy_te_write(dphy, RX_SYS_1, range_gen3[range].hsfregrange);
+	dw_dphy_te_write(dphy, RX_SYS_0, 0x20);
+	dw_dphy_te_write(dphy, RX_RX_STARTUP_OVR_2,
+			(u8) range_gen3[range].osc_freq_target);
+	dw_dphy_te_write(dphy, RX_RX_STARTUP_OVR_3,
+			(u8) (range_gen3[range].osc_freq_target >> 8));
+	dw_dphy_te_write(dphy, RX_RX_STARTUP_OVR_4, 0x01);
+
+	if (dphy->compat_mode) {
+		dw_dphy_te_write(dphy, RX_RX_STARTUP_OVR_1, 0x01);
+		dw_dphy_te_write(dphy, RX_RX_STARTUP_OVR_0, 0x80);
+	}
+
+	if ((dphy->compat_mode) || (input_freq <= 1500))
+		dw_dphy_te_write(dphy, RX_SYS_7, 0x38);
+
+	return 0;
+}
+
+static int dw_dphy_gen3_8bit_configure(struct dw_dphy_rx *dphy)
+{
+	u32 input_freq = dphy->dphy_freq;
+	u8 data;
+	u8 range = 0;
+
+	pr_debug("PHY GEN 3 Freq: %u\n", input_freq);
+	for (range = 0; (range < ARRAY_SIZE(range_gen3) - 1) &&
+		((input_freq / 1000) > range_gen3[range].freq); range++)
+		;
+
+	dw_dphy_te_write(dphy, RX_SKEW_CAL, dw_dphy_g118_settle(dphy));
+	data = 1<<7 | range_gen3[range].hsfregrange;
+	dw_dphy_te_write(dphy, HSFREQRANGE_8BIT, data);
+	dw_dphy_gen3_8bit_tc_power_up(dphy);
+
+	return 0;
+}
+
+static int dw_dphy_gen2_configure(struct dw_dphy_rx *dphy)
+{
+	u32 input_freq = dphy->dphy_freq;
+	u8 data;
+	u8 range = 0;
+
+	/* provide an initial active-high test clear pulse in TESTCLR  */
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 1, PHY_TESTCLR, 1);
+	dw_dphy_write_msk(dphy, R_CSI2_DPHY_TST_CTRL0, 0, PHY_TESTCLR, 1);
+
+	pr_debug("PHY GEN 2 Freq: %u\n", input_freq);
+	for (range = 0; (range < ARRAY_SIZE(range_gen2) - 1) &&
+		((input_freq / 1000) > range_gen2[range].freq); range++)
+		;
+
+	data = range_gen2[range].hsfregrange << 1;
+	dw_dphy_te_write(dphy, HSFREQRANGE_8BIT, data);
+
+	return 0;
+}
+
+static int dw_dphy_configure(struct dw_dphy_rx *dphy)
+{
+	dw_dphy_pwr_down(dphy);
+
+	if (dphy->dphy_gen == GEN3) {
+		dw_dphy_if_init(dphy);
+
+		if (dphy->dphy_te_len == BIT12)
+			dw_dphy_gen3_12bit_configure(dphy);
+		else
+			dw_dphy_gen3_8bit_configure(dphy);
+	} else
+		dw_dphy_gen2_configure(dphy);
+
+	dw_dphy_pwr_up(dphy);
+
+	return 0;
+}
+
+int dw_dphy_if_set_idelay(struct dw_dphy_rx *dphy, u8 dly, u8 cells)
+{
+	uint32_t val = 0;
+
+	dw_dphy_if_write(dphy, IDLYCFG, 0);
+
+	dw_dphy_if_write(dphy, IDLYSEL, cells);
+	dw_dphy_if_write(dphy, IDLYCNTINVAL, dly);
+
+	/* Pulse Value Set */
+	dw_dphy_if_write(dphy, IDLYCFG, 1);
+	usleep_range(10, 20);
+	dw_dphy_if_write(dphy, IDLYCFG, 0);
+
+	/* Pulse IDELAY CTRL Reset */
+	dw_dphy_if_write(dphy, DPHY1REGRSTN, 0);
+	usleep_range(10, 20);
+	dw_dphy_if_write(dphy, DPHY1REGRSTN, 1);
+
+	/* Get Value*/
+	val = dw_dphy_if_read(dphy, IDLYCNTOUTVAL);
+
+	if (val != dly) {
+		pr_info("odelay config failed, set %d get %d", dly, val);
+		return -1;
+	}
+
+	return 0;
+}
+
+int dw_dphy_if_get_idelay(struct dw_dphy_rx *dphy)
+{
+	return dw_dphy_if_read(dphy, IDLYCNTOUTVAL);
+}
+
+int dw_dphy_if_set_idelay_lane(struct dw_dphy_rx *dphy, u8 dly, u8 lane)
+{
+	int cell;
+
+	switch (lane) {
+	case 0:
+		for (cell = 3; cell <= 10; cell++)
+			dw_dphy_if_set_idelay(dphy, dly, cell);
+		break;
+	case 1:
+		for (cell = 14; cell <= 21; cell++)
+			dw_dphy_if_set_idelay(dphy, dly, cell);
+		break;
+	case 2:
+		for (cell = 24; cell <= 31; cell++)
+			dw_dphy_if_set_idelay(dphy, dly, cell);
+		break;
+	case 3:
+		for (cell = 34; cell <= 41; cell++)
+			dw_dphy_if_set_idelay(dphy, dly, cell);
+		break;
+	case 4: /* ALL */
+		dw_dphy_if_set_idelay(dphy, dly, 0x7F);
+		break;
+	default:
+		pr_err("Lane Value not recognized\n");
+		return -1;
+	}
+	return 0;
+}
+
+int dw_dphy_init(struct phy *phy)
+{
+	struct dw_dphy_rx *dphy = phy_get_drvdata(phy);
+
+	dw_dphy_write(dphy, R_CSI2_DPHY_RSTZ, 0);
+	dw_dphy_write(dphy, R_CSI2_DPHY_SHUTDOWNZ, 0);
+
+	return 0;
+}
+
+static int dw_dphy_set_phy_state(struct dw_dphy_rx *dphy, u32 on)
+{
+	u8 hs_freq;
+
+	dphy->lanes_config = dw_dphy_setup_config(dphy);
+
+	if (dphy->dphy_te_len == BIT12)
+		hs_freq = RX_SYS_1;
+	else
+		hs_freq = HSFREQRANGE_8BIT;
+
+	if (on) {
+		dw_dphy_configure(dphy);
+		pr_debug("HS Code: 0X%x\n", dw_dphy_te_read(dphy, hs_freq));
+	} else {
+		dw_dphy_write(dphy, R_CSI2_DPHY_SHUTDOWNZ, 0);
+		dw_dphy_write(dphy, R_CSI2_DPHY_RSTZ, 0);
+	}
+
+	return 0;
+}
+
+int dw_dphy_power_on(struct phy *phy)
+{
+	struct dw_dphy_rx *dphy = phy_get_drvdata(phy);
+
+	return dw_dphy_set_phy_state(dphy, 1);
+}
+
+int dw_dphy_power_off(struct phy *phy)
+{
+	struct dw_dphy_rx *dphy = phy_get_drvdata(phy);
+
+	return dw_dphy_set_phy_state(dphy, 0);
+}
+
+int dw_dphy_reset(struct phy *phy)
+{
+	struct dw_dphy_rx *dphy = phy_get_drvdata(phy);
+
+	dw_dphy_write(dphy, R_CSI2_DPHY_RSTZ, 0);
+	usleep_range(100, 200);
+	dw_dphy_write(dphy, R_CSI2_DPHY_RSTZ, 1);
+
+	return 0;
+}
diff --git a/drivers/media/platform/dwc/dw-dphy-rx.h b/drivers/media/platform/dwc/dw-dphy-rx.h
new file mode 100644
index 0000000..5375685
--- /dev/null
+++ b/drivers/media/platform/dwc/dw-dphy-rx.h
@@ -0,0 +1,176 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Synopsys MIPI D-PHY driver
+ *
+ * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
+ * Author: Luis Oliveira <Luis.Oliveira@synopsys.com>
+ */
+
+#ifndef __PHY_SNPS_DPHY_RX_H__
+#define __PHY_SNPS_DPHY_RX_H__
+
+#include <linux/debugfs.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_gpio.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+
+/* DPHY interface register bank*/
+#define R_CSI2_DPHY_SHUTDOWNZ 0x0
+#define R_CSI2_DPHY_RSTZ 0x4
+#define R_CSI2_DPHY_RX 0x8
+#define	R_CSI2_DPHY_STOPSTATE 0xC
+#define R_CSI2_DPHY_TST_CTRL0 0x10
+#define R_CSI2_DPHY_TST_CTRL1 0x14
+#define R_CSI2_DPHY2_TST_CTRL0 0x18
+#define R_CSI2_DPHY2_TST_CTRL1 0x1C
+
+enum dphy_id_mask {
+	DPHY_ID_LANE_SUPPORT = 0,
+	DPHY_ID_IF = 4,
+	DPHY_ID_GEN = 8,
+};
+
+enum dphy_gen_values {
+	GEN1 = 0,
+	GEN2 = 1,
+	GEN3 = 2,
+};
+
+enum dphy_interface_length {
+	BIT8 = 8,
+	BIT12 = 12,
+};
+
+enum tst_ctrl0 {
+	PHY_TESTCLR = 0,
+	PHY_TESTCLK = 1,
+};
+
+enum tst_ctrl1 {
+	PHY_TESTDIN = 0,
+	PHY_TESTDOUT = 8,
+	PHY_TESTEN = 16,
+};
+
+enum lanes_config_values {
+	CTRL_4_LANES = 0,
+	CTRL_8_LANES = 1,
+};
+
+enum dphy_tc {
+	CFGCLKFREQRANGE_TX = 0x02,
+	CFGCLKFREQRANGE_RX = 0x05,
+	BYPASS = 0x20,
+	IO_DS = 0x30,
+};
+
+enum dphy_8bit_interface_addr {
+	BANDGAP_CTRL = 0x24,
+	HS_RX_CTRL_LANE0 = 0x42,
+	HSFREQRANGE_8BIT = 0x44,
+	OSC_FREQ_TARGET_RX0_LSB	= 0x4e,
+	OSC_FREQ_TARGET_RX0_MSB	= 0x4f,
+	HS_RX_CTRL_LANE1 = 0x52,
+	OSC_FREQ_TARGET_RX1_LSB	= 0x5e,
+	OSC_FREQ_TARGET_RX1_MSB	= 0x5f,
+	RX_SKEW_CAL	= 0x7e,
+	HS_RX_CTRL_LANE2 = 0x82,
+	OSC_FREQ_TARGET_RX2_LSB	= 0x8e,
+	OSC_FREQ_TARGET_RX2_MSB	= 0x8f,
+	HS_RX_CTRL_LANE3 = 0x92,
+	OSC_FREQ_TARGET_RX3_LSB	= 0x9e,
+	OSC_FREQ_TARGET_RX3_MSB	= 0x9f,
+};
+
+enum dphy_12bit_interface_addr {
+	RX_SYS_0 = 0x01,
+	RX_SYS_1 = 0x02,
+	RX_SYS_7 = 0x08,
+	RX_RX_STARTUP_OVR_0 = 0xe0,
+	RX_RX_STARTUP_OVR_1 = 0xe1,
+	RX_RX_STARTUP_OVR_2 = 0xe2,
+	RX_RX_STARTUP_OVR_3 = 0xe3,
+	RX_RX_STARTUP_OVR_4 = 0xe4,
+};
+
+/* Gen3 interface register bank*/
+#define IDLYCFG	0x00
+#define IDLYSEL	0x04
+#define IDLYCNTINVAL 0x08
+#define IDLYCNTOUTVAL 0x0c
+#define DPHY1REGRSTN 0x10
+#define DPHYZCALSTAT 0x14
+#define DPHYZCALCTRL 0x18
+#define DPHYLANE0STAT 0x1c
+#define DPHYLANE1STAT 0x20
+#define DPHYLANE2STAT 0x24
+#define DPHYLANE3STAT 0x28
+#define DPHYCLKSTAT 0x2c
+#define DPHYZCLKCTRL 0x30
+#define TCGENPURPOSOUT 0x34
+#define TCGENPURPOSIN 0x38
+#define DPHYGENERICOUT 0x3c
+#define DPHYGENERICIN 0x40
+#define DPHYGLUEIFTESTER 0x44
+#define DPHYID 0x100
+
+enum glueiftester {
+	GLUELOGIC = 0x4,
+	RX_PHY = 0x2,
+	TX_PHY = 0x1,
+	RESET = 0x0,
+};
+
+struct dw_dphy_rx {
+	spinlock_t slock;
+	struct phy *phy;
+	uint32_t dphy_freq;
+	uint32_t dphy_gen;
+	uint32_t dphy_te_len;
+	uint32_t lanes_config;
+	uint32_t max_lanes;
+	uint32_t compat_mode;
+	uint32_t lp_time;
+
+	void __iomem *base_address; /* test interface */
+	void __iomem *dphy1_if_addr; /* gluelogic phy 1 */
+	void __iomem *dphy2_if_addr; /* gluelogic phy 2 */
+
+	int config_gpio;
+	uint8_t setup_config;
+};
+
+int dw_dphy_init(struct phy *phy);
+int dw_dphy_reset(struct phy *phy);
+int dw_dphy_power_off(struct phy *phy);
+int dw_dphy_power_on(struct phy *phy);
+
+u8 dw_dphy_setup_config(struct dw_dphy_rx *dphy);
+u32 dw_dphy_if_read(struct dw_dphy_rx *dphy, u64 address);
+void dw_dphy_write(struct dw_dphy_rx *dphy, u32 address, u32 data);
+u32 dw_dphy_read(struct dw_dphy_rx *dphy, u64 address);
+int dw_dphy_te_read(struct dw_dphy_rx *dphy, u32 addr);
+int dw_dphy_if_get_idelay(struct dw_dphy_rx *dphy);
+int dw_dphy_if_set_idelay_lane(struct dw_dphy_rx *dphy, u8 dly, u8 lane);
+
+static inline
+u32 dw_dphy_if_read_msk(struct dw_dphy_rx *dphy,
+		u32 address, u8 shift, u8 width)
+{
+	return (dw_dphy_if_read(dphy, address) >> shift) & ((1 << width) - 1);
+}
+
+static inline
+u32 dw_dphy_read_msk(struct dw_dphy_rx *dev, u32 address, u8 shift,  u8 width)
+{
+	return (dw_dphy_read(dev, address) >> shift) & ((1 << width) - 1);
+}
+#endif /*__PHY_SNPS_DPHY_RX_H__*/
-- 
2.9.3