[PATCH v7 2/2] phy: starfive: Add mipi dphy rx support
Changhuang Liang
changhuang.liang at starfivetech.com
Tue Jul 18 00:08:03 PDT 2023
Add mipi dphy rx support for the StarFive JH7110 SoC. It is used to
transfer CSI camera data.
Signed-off-by: Changhuang Liang <changhuang.liang at starfivetech.com>
Reviewed-by: Minda Chen <minda.chen at starfivetech.com>
---
MAINTAINERS | 7 +
drivers/phy/starfive/Kconfig | 9 +
drivers/phy/starfive/Makefile | 5 +-
drivers/phy/starfive/phy-jh7110-dphy-rx.c | 232 ++++++++++++++++++++++
4 files changed, 251 insertions(+), 2 deletions(-)
create mode 100644 drivers/phy/starfive/phy-jh7110-dphy-rx.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 38927b9ce712..f849e8e3f765 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20116,6 +20116,13 @@ S: Maintained
F: Documentation/devicetree/bindings/net/starfive,jh7110-dwmac.yaml
F: drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
+STARFIVE JH7110 DPHY RX DRIVER
+M: Jack Zhu <jack.zhu at starfivetech.com>
+M: Changhuang Liang <changhuang.liang at starfivetech.com>
+S: Supported
+F: Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
+F: drivers/phy/starfive/phy-starfive-dphy-rx.c
+
STARFIVE JH7110 MMC/SD/SDIO DRIVER
M: William Qiu <william.qiu at starfivetech.com>
S: Supported
diff --git a/drivers/phy/starfive/Kconfig b/drivers/phy/starfive/Kconfig
index da9a98cdf7e3..a560533a674e 100644
--- a/drivers/phy/starfive/Kconfig
+++ b/drivers/phy/starfive/Kconfig
@@ -3,6 +3,15 @@
# Phy drivers for StarFive platforms
#
+config PHY_STARFIVE_JH7110_DPHY_RX
+ tristate "StarFive JH7110 D-PHY RX support"
+ select GENERIC_PHY
+ select GENERIC_PHY_MIPI_DPHY
+ help
+ Choose this option if you have a StarFive D-PHY in your
+ system. If M is selected, the module will be called
+ phy-jh7110-dphy-rx.ko.
+
config PHY_STARFIVE_JH7110_PCIE
tristate "Starfive JH7110 PCIE 2.0/USB 3.0 PHY support"
depends on HAS_IOMEM
diff --git a/drivers/phy/starfive/Makefile b/drivers/phy/starfive/Makefile
index 1c62d93e3280..b391018b7c47 100644
--- a/drivers/phy/starfive/Makefile
+++ b/drivers/phy/starfive/Makefile
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_PHY_STARFIVE_JH7110_PCIE) += phy-jh7110-pcie.o
-obj-$(CONFIG_PHY_STARFIVE_JH7110_USB) += phy-jh7110-usb.o
+obj-$(CONFIG_PHY_STARFIVE_JH7110_DPHY_RX) += phy-jh7110-dphy-rx.o
+obj-$(CONFIG_PHY_STARFIVE_JH7110_PCIE) += phy-jh7110-pcie.o
+obj-$(CONFIG_PHY_STARFIVE_JH7110_USB) += phy-jh7110-usb.o
diff --git a/drivers/phy/starfive/phy-jh7110-dphy-rx.c b/drivers/phy/starfive/phy-jh7110-dphy-rx.c
new file mode 100644
index 000000000000..037a9e0263cd
--- /dev/null
+++ b/drivers/phy/starfive/phy-jh7110-dphy-rx.c
@@ -0,0 +1,232 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * StarFive JH7110 DPHY RX driver
+ *
+ * Copyright (C) 2023 StarFive Technology Co., Ltd.
+ * Author: Jack Zhu <jack.zhu at starfivetech.com>
+ * Author: Changhuang Liang <changhuang.liang at starfivetech.com>
+ */
+
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+
+#define STF_DPHY_APBCFGSAIF_SYSCFG(x) (x)
+
+#define STF_DPHY_ENABLE_CLK BIT(6)
+#define STF_DPHY_ENABLE_CLK1 BIT(7)
+#define STF_DPHY_ENABLE_LAN0 BIT(8)
+#define STF_DPHY_ENABLE_LAN1 BIT(9)
+#define STF_DPHY_ENABLE_LAN2 BIT(10)
+#define STF_DPHY_ENABLE_LAN3 BIT(11)
+#define STF_DPHY_LANE_SWAP_CLK GENMASK(22, 20)
+#define STF_DPHY_LANE_SWAP_CLK1 GENMASK(25, 23)
+#define STF_DPHY_LANE_SWAP_LAN0 GENMASK(28, 26)
+#define STF_DPHY_LANE_SWAP_LAN1 GENMASK(31, 29)
+
+#define STF_DPHY_LANE_SWAP_LAN2 GENMASK(2, 0)
+#define STF_DPHY_LANE_SWAP_LAN3 GENMASK(5, 3)
+#define STF_DPHY_PLL_CLK_SEL GENMASK(21, 12)
+#define STF_DPHY_PRECOUNTER_IN_CLK GENMASK(29, 22)
+
+#define STF_DPHY_PRECOUNTER_IN_CLK1 GENMASK(7, 0)
+#define STF_DPHY_PRECOUNTER_IN_LAN0 GENMASK(15, 8)
+#define STF_DPHY_PRECOUNTER_IN_LAN1 GENMASK(23, 16)
+#define STF_DPHY_PRECOUNTER_IN_LAN2 GENMASK(31, 24)
+
+#define STF_DPHY_PRECOUNTER_IN_LAN3 GENMASK(7, 0)
+#define STF_DPHY_RX_1C2C_SEL BIT(8)
+
+#define STF_MAP_LANES_NUM 6
+
+struct regval {
+ u32 addr;
+ u32 val;
+};
+
+struct stf_dphy_info {
+ /**
+ * @maps:
+ *
+ * Physical lanes and logic lanes mapping table.
+ *
+ * The default order is:
+ * [clk lane0, data lane 0, data lane 1, data lane 2, date lane 3, clk lane 1]
+ */
+ u8 maps[STF_MAP_LANES_NUM];
+};
+
+struct stf_dphy {
+ struct device *dev;
+ void __iomem *regs;
+ struct clk *cfg_clk;
+ struct clk *ref_clk;
+ struct clk *tx_clk;
+ struct reset_control *rstc;
+ struct regulator *mipi_0p9;
+ struct phy *phy;
+ const struct stf_dphy_info *info;
+};
+
+static int stf_dphy_configure(struct phy *phy, union phy_configure_opts *opts)
+{
+ struct stf_dphy *dphy = phy_get_drvdata(phy);
+ const struct stf_dphy_info *info = dphy->info;
+
+ writel(FIELD_PREP(STF_DPHY_ENABLE_CLK, 1) |
+ FIELD_PREP(STF_DPHY_ENABLE_CLK1, 1) |
+ FIELD_PREP(STF_DPHY_ENABLE_LAN0, 1) |
+ FIELD_PREP(STF_DPHY_ENABLE_LAN1, 1) |
+ FIELD_PREP(STF_DPHY_ENABLE_LAN2, 1) |
+ FIELD_PREP(STF_DPHY_ENABLE_LAN3, 1) |
+ FIELD_PREP(STF_DPHY_LANE_SWAP_CLK, info->maps[0]) |
+ FIELD_PREP(STF_DPHY_LANE_SWAP_CLK1, info->maps[5]) |
+ FIELD_PREP(STF_DPHY_LANE_SWAP_LAN0, info->maps[1]) |
+ FIELD_PREP(STF_DPHY_LANE_SWAP_LAN1, info->maps[2]),
+ dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(188));
+
+ writel(FIELD_PREP(STF_DPHY_LANE_SWAP_LAN2, info->maps[3]) |
+ FIELD_PREP(STF_DPHY_LANE_SWAP_LAN3, info->maps[4]) |
+ FIELD_PREP(STF_DPHY_PRECOUNTER_IN_CLK, 8),
+ dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(192));
+
+ writel(FIELD_PREP(STF_DPHY_PRECOUNTER_IN_CLK1, 8) |
+ FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN0, 7) |
+ FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN1, 7) |
+ FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN2, 7),
+ dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(196));
+
+ writel(FIELD_PREP(STF_DPHY_PRECOUNTER_IN_LAN3, 7),
+ dphy->regs + STF_DPHY_APBCFGSAIF_SYSCFG(200));
+
+ return 0;
+}
+
+static int stf_dphy_power_on(struct phy *phy)
+{
+ struct stf_dphy *dphy = phy_get_drvdata(phy);
+ int ret;
+
+ ret = pm_runtime_resume_and_get(dphy->dev);
+ if (ret < 0)
+ return ret;
+
+ ret = regulator_enable(dphy->mipi_0p9);
+ if (ret) {
+ pm_runtime_put(dphy->dev);
+ return ret;
+ }
+
+ clk_set_rate(dphy->cfg_clk, 99000000);
+ clk_set_rate(dphy->ref_clk, 49500000);
+ clk_set_rate(dphy->tx_clk, 19800000);
+ reset_control_deassert(dphy->rstc);
+
+ return 0;
+}
+
+static int stf_dphy_power_off(struct phy *phy)
+{
+ struct stf_dphy *dphy = phy_get_drvdata(phy);
+
+ reset_control_assert(dphy->rstc);
+
+ regulator_disable(dphy->mipi_0p9);
+
+ pm_runtime_put_sync(dphy->dev);
+
+ return 0;
+}
+
+static const struct phy_ops stf_dphy_ops = {
+ .configure = stf_dphy_configure,
+ .power_on = stf_dphy_power_on,
+ .power_off = stf_dphy_power_off,
+};
+
+static int stf_dphy_probe(struct platform_device *pdev)
+{
+ struct phy_provider *phy_provider;
+ struct stf_dphy *dphy;
+
+ dphy = devm_kzalloc(&pdev->dev, sizeof(*dphy), GFP_KERNEL);
+ if (!dphy)
+ return -ENOMEM;
+
+ dphy->info = of_device_get_match_data(&pdev->dev);
+
+ dev_set_drvdata(&pdev->dev, dphy);
+ dphy->dev = &pdev->dev;
+
+ dphy->regs = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(dphy->regs))
+ return PTR_ERR(dphy->regs);
+
+ dphy->cfg_clk = devm_clk_get(&pdev->dev, "cfg");
+ if (IS_ERR(dphy->cfg_clk))
+ return PTR_ERR(dphy->cfg_clk);
+
+ dphy->ref_clk = devm_clk_get(&pdev->dev, "ref");
+ if (IS_ERR(dphy->ref_clk))
+ return PTR_ERR(dphy->ref_clk);
+
+ dphy->tx_clk = devm_clk_get(&pdev->dev, "tx");
+ if (IS_ERR(dphy->tx_clk))
+ return PTR_ERR(dphy->tx_clk);
+
+ dphy->rstc = devm_reset_control_array_get_exclusive(&pdev->dev);
+ if (IS_ERR(dphy->rstc))
+ return PTR_ERR(dphy->rstc);
+
+ dphy->mipi_0p9 = devm_regulator_get(&pdev->dev, "mipi_0p9");
+ if (IS_ERR(dphy->mipi_0p9))
+ return PTR_ERR(dphy->mipi_0p9);
+
+ dphy->phy = devm_phy_create(&pdev->dev, NULL, &stf_dphy_ops);
+ if (IS_ERR(dphy->phy)) {
+ dev_err(&pdev->dev, "Failed to create PHY\n");
+ return PTR_ERR(dphy->phy);
+ }
+
+ pm_runtime_enable(&pdev->dev);
+
+ phy_set_drvdata(dphy->phy, dphy);
+ phy_provider = devm_of_phy_provider_register(&pdev->dev,
+ of_phy_simple_xlate);
+
+ return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static const struct stf_dphy_info starfive_dphy_info = {
+ .maps = {4, 0, 1, 2, 3, 5},
+};
+
+static const struct of_device_id stf_dphy_dt_ids[] = {
+ {
+ .compatible = "starfive,jh7110-dphy-rx",
+ .data = &starfive_dphy_info,
+ },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, stf_dphy_dt_ids);
+
+static struct platform_driver stf_dphy_driver = {
+ .probe = stf_dphy_probe,
+ .driver = {
+ .name = "starfive-dphy-rx",
+ .of_match_table = stf_dphy_dt_ids,
+ },
+};
+module_platform_driver(stf_dphy_driver);
+
+MODULE_AUTHOR("Jack Zhu <jack.zhu at starfivetech.com>");
+MODULE_AUTHOR("Changhuang Liang <changhuang.liang at starfivetech.com>");
+MODULE_DESCRIPTION("StarFive JH7110 DPHY RX driver");
+MODULE_LICENSE("GPL");
--
2.25.1
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