Add MIPI CSI PHY driver for i.MX8QM, i.MX8QXP.
Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
---
Change from v1 to v2
- remove un-test code for 8ulp.
- remove unused regiser define
---
drivers/phy/freescale/Kconfig | 9 ++
drivers/phy/freescale/Makefile | 1 +
drivers/phy/freescale/phy-fsl-imx8q-mipi-cphy.c | 185 ++++++++++++++++++++++++
3 files changed, 195 insertions(+)
diff --git a/drivers/phy/freescale/Kconfig b/drivers/phy/freescale/Kconfig
index dcd9acff6d01a..f412fa405b9b6 100644
--- a/drivers/phy/freescale/Kconfig
+++ b/drivers/phy/freescale/Kconfig
@@ -35,6 +35,15 @@ config PHY_FSL_IMX8M_PCIE
Enable this to add support for the PCIE PHY as found on
i.MX8M family of SOCs.
+config PHY_FSL_IMX8Q_MIPI_CPHY
+ tristate "Freescale MIPI CSI PHY support"
+ depends on OF && HAS_IOMEM
+ select GENERIC_PHY
+ select REGMAP_MMIO
+ help
+ Enable this to add support for the MIPI CSI PHY as found
+ on NXP's i.MX8 family of SOCs.
+
config PHY_FSL_IMX8QM_HSIO
tristate "Freescale i.MX8QM HSIO PHY"
depends on OF && HAS_IOMEM
diff --git a/drivers/phy/freescale/Makefile b/drivers/phy/freescale/Makefile
index 658eac7d0a622..8ff72dfdcf654 100644
--- a/drivers/phy/freescale/Makefile
+++ b/drivers/phy/freescale/Makefile
@@ -3,6 +3,7 @@ obj-$(CONFIG_PHY_FSL_IMX8MQ_USB) += phy-fsl-imx8mq-usb.o
obj-$(CONFIG_PHY_MIXEL_LVDS_PHY) += phy-fsl-imx8qm-lvds-phy.o
obj-$(CONFIG_PHY_MIXEL_MIPI_DPHY) += phy-fsl-imx8-mipi-dphy.o
obj-$(CONFIG_PHY_FSL_IMX8M_PCIE) += phy-fsl-imx8m-pcie.o
+obj-$(CONFIG_PHY_FSL_IMX8Q_MIPI_CPHY) += phy-fsl-imx8q-mipi-cphy.o
obj-$(CONFIG_PHY_FSL_IMX8QM_HSIO) += phy-fsl-imx8qm-hsio.o
obj-$(CONFIG_PHY_FSL_LYNX_28G) += phy-fsl-lynx-28g.o
obj-$(CONFIG_PHY_FSL_SAMSUNG_HDMI_PHY) += phy-fsl-samsung-hdmi.o
diff --git a/drivers/phy/freescale/phy-fsl-imx8q-mipi-cphy.c b/drivers/phy/freescale/phy-fsl-imx8q-mipi-cphy.c
new file mode 100644
index 0000000000000..3137c89eab057
--- /dev/null
+++ b/drivers/phy/freescale/phy-fsl-imx8q-mipi-cphy.c
@@ -0,0 +1,185 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2025 NXP
+ */
+
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+struct imx8_mipi_phy {
+ struct phy *phy;
+ struct device *dev;
+ struct regmap *phy_gpr;
+ int speed;
+ const struct imx8_mipi_drvdata *drvdata;
+};
+
+#define CSI2SS_PL_CLK_INTERVAL_US 10000
+#define CSI2SS_PL_CLK_TIMEOUT_US 100000
+
+#define CSI2SS_PLM_CTRL 0x0
+#define CSI2SS_PLM_CTRL_PL_CLK_RUN BIT(31)
+#define CSI2SS_PLM_CTRL_VSYNC_OVERRIDE BIT(9)
+#define CSI2SS_PLM_CTRL_HSYNC_OVERRIDE BIT(10)
+#define CSI2SS_PLM_CTRL_VALID_OVERRIDE BIT(11)
+#define CSI2SS_PLM_CTRL_POLARITY_MASK BIT(12)
+#define CSI2SS_PLM_CTRL_ENABLE_PL BIT(0)
+
+#define CSI2SS_PHY_CTRL 0x4
+#define CSI2SS_PHY_CTRL_PD BIT(22)
+#define CSI2SS_PHY_CTRL_RTERM_SEL BIT(21)
+#define CSI2SS_PLM_CTRL_POLARITY BIT(12)
+#define CSI2SS_PHY_CTRL_RX_HS_SETTLE_MASK GENMASK(9, 4)
+#define CSI2SS_PHY_CTRL_CONT_CLK_MODE BIT(3)
+#define CSI2SS_PHY_CTRL_DDRCLK_EN BIT(2)
+#define CSI2SS_PHY_CTRL_AUTO_PD_EN BIT(1)
+#define CSI2SS_PHY_CTRL_RX_ENABLE BIT(0)
+
+#define CSI2SS_DATA_TYPE 0x38
+#define CSI2SS_DATA_TYPE_MASK GENMASK(23, 0)
+
+#define CSI2SS_CTRL_CLK_RESET 0x44
+#define CSI2SS_CTRL_CLK_RESET_EN BIT(0)
+
+static int imx8_mipi_phy_power_on(struct phy *phy)
+{
+ struct imx8_mipi_phy *imx8_phy = phy_get_drvdata(phy);
+ int ret;
+ u32 val;
+
+ /* clear format */
+ regmap_clear_bits(imx8_phy->phy_gpr, CSI2SS_DATA_TYPE, CSI2SS_DATA_TYPE_MASK);
+
+ /* clear polarity */
+ regmap_clear_bits(imx8_phy->phy_gpr, CSI2SS_PLM_CTRL,
+ CSI2SS_PLM_CTRL_VSYNC_OVERRIDE |
+ CSI2SS_PLM_CTRL_HSYNC_OVERRIDE |
+ CSI2SS_PLM_CTRL_VALID_OVERRIDE |
+ CSI2SS_PLM_CTRL_POLARITY_MASK);
+
+ regmap_update_bits(imx8_phy->phy_gpr, CSI2SS_PHY_CTRL, CSI2SS_PHY_CTRL_RX_HS_SETTLE_MASK,
+ FIELD_PREP(CSI2SS_PHY_CTRL_RX_HS_SETTLE_MASK, imx8_phy->speed));
+
+ regmap_set_bits(imx8_phy->phy_gpr, CSI2SS_PHY_CTRL,
+ CSI2SS_PHY_CTRL_RX_ENABLE | CSI2SS_PHY_CTRL_DDRCLK_EN |
+ CSI2SS_PHY_CTRL_CONT_CLK_MODE | CSI2SS_PHY_CTRL_PD |
+ CSI2SS_PHY_CTRL_RTERM_SEL | CSI2SS_PHY_CTRL_AUTO_PD_EN);
+
+ ret = regmap_read_poll_timeout(imx8_phy->phy_gpr, CSI2SS_PLM_CTRL,
+ val, !(val & CSI2SS_PLM_CTRL_PL_CLK_RUN),
+ CSI2SS_PL_CLK_INTERVAL_US,
+ CSI2SS_PL_CLK_TIMEOUT_US);
+
+ if (ret) {
+ dev_err(imx8_phy->dev, "Timeout waiting for Pixel-Link clock");
+ return ret;
+ }
+
+ /* Enable Pixel link Master*/
+ regmap_set_bits(imx8_phy->phy_gpr, CSI2SS_PLM_CTRL,
+ CSI2SS_PLM_CTRL_ENABLE_PL | CSI2SS_PLM_CTRL_VALID_OVERRIDE);
+
+ /* PHY Enable */
+ regmap_clear_bits(imx8_phy->phy_gpr, CSI2SS_PHY_CTRL,
+ CSI2SS_PHY_CTRL_PD | CSI2SS_PLM_CTRL_POLARITY);
+
+ /* Release Reset */
+ regmap_set_bits(imx8_phy->phy_gpr, CSI2SS_CTRL_CLK_RESET, CSI2SS_CTRL_CLK_RESET_EN);
+
+ return ret;
+}
+
+static int imx8_mipi_phy_power_off(struct phy *phy)
+{
+ struct imx8_mipi_phy *imx8_phy = phy_get_drvdata(phy);
+
+ /* Disable Pixel Link */
+ regmap_write(imx8_phy->phy_gpr, CSI2SS_PLM_CTRL, 0x0);
+
+ /* Disable PHY */
+ regmap_write(imx8_phy->phy_gpr, CSI2SS_PHY_CTRL, 0x0);
+
+ return 0;
+};
+
+static int imx8_mipi_phy_set_speed(struct phy *phy, int speed)
+{
+ struct imx8_mipi_phy *imx8_phy = phy_get_drvdata(phy);
+
+ imx8_phy->speed = speed;
+
+ return 0;
+}
+
+static const struct phy_ops imx8_mipi_phy_ops = {
+ .power_on = imx8_mipi_phy_power_on,
+ .power_off = imx8_mipi_phy_power_off,
+ .set_speed = imx8_mipi_phy_set_speed,
+ .owner = THIS_MODULE,
+};
+
+static const struct of_device_id imx8_mipi_phy_of_match[] = {
+ { .compatible = "fsl,imx8qxp-mipi-cphy" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, imx8_mipi_phy_of_match);
+
+static const struct regmap_config regmap_config = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+};
+
+static int imx8_mipi_phy_probe(struct platform_device *pdev)
+{
+ struct phy_provider *phy_provider;
+ struct device *dev = &pdev->dev;
+ struct imx8_mipi_phy *imx8_phy;
+ void __iomem *base;
+
+ imx8_phy = devm_kzalloc(dev, sizeof(*imx8_phy), GFP_KERNEL);
+ if (!imx8_phy)
+ return -ENOMEM;
+
+ imx8_phy->dev = dev;
+ imx8_phy->drvdata = of_device_get_match_data(dev);
+
+ base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(base))
+ return dev_err_probe(dev, IS_ERR(base), "missed phy base register\n");
+
+ imx8_phy->phy_gpr = devm_regmap_init_mmio(dev, base, ®map_config);
+ if (IS_ERR(imx8_phy->phy_gpr))
+ return dev_err_probe(dev, PTR_ERR(imx8_phy->phy_gpr),
+ "unable to find iomuxc registers\n");
+
+ imx8_phy->phy = devm_phy_create(dev, NULL, &imx8_mipi_phy_ops);
+ if (IS_ERR(imx8_phy->phy))
+ return PTR_ERR(imx8_phy->phy);
+
+ phy_set_drvdata(imx8_phy->phy, imx8_phy);
+
+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+
+ return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static struct platform_driver imx8_mipi_phy_driver = {
+ .probe = imx8_mipi_phy_probe,
+ .driver = {
+ .name = "imx8-mipi-cphy",
+ .of_match_table = imx8_mipi_phy_of_match,
+ }
+};
+module_platform_driver(imx8_mipi_phy_driver);
+
+MODULE_DESCRIPTION("FSL IMX8 MIPI CSI PHY driver");
+MODULE_LICENSE("GPL");
--
2.34.1
