[PATCH v1 2/2] phy: starfive: Add mipi dphy tx support

Shengyang Chen
2023-11-17T13:04:38Z

Add mipi dphy tx support for the StarFive JH7110 SoC.
It is used to transfer DSI data.

Signed-off-by: Shengyang Chen <shengyang.chen@starfivetech.com>
---
MAINTAINERS | 7 +
drivers/phy/starfive/Kconfig | 10 +
drivers/phy/starfive/Makefile | 1 +
drivers/phy/starfive/phy-jh7110-dphy-tx.c | 542 ++++++++++++++++++++++
4 files changed, 560 insertions(+)
create mode 100644 drivers/phy/starfive/phy-jh7110-dphy-tx.c

diff --git a/MAINTAINERS b/MAINTAINERS
index cfb533ec89e8..255c577afa49 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20677,6 +20677,13 @@ S: Supported
F: Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
F: drivers/phy/starfive/phy-jh7110-dphy-rx.c

+STARFIVE JH7110 DPHY TX DRIVER
+M: Keith Zhao <keith.zhao@starfivetech.com>
+M: Shengyang Chen <shengyang.chen@starfivetech.com>
+S: Supported
+F: Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-tx.yaml
+F: drivers/phy/starfive/phy-jh7110-dphy-tx.c
+
STARFIVE JH7110 MMC/SD/SDIO DRIVER
M: William Qiu <william.qiu@starfivetech.com>
S: Supported
diff --git a/drivers/phy/starfive/Kconfig b/drivers/phy/starfive/Kconfig
index 9508e2143011..d0cdd7cb4a13 100644
--- a/drivers/phy/starfive/Kconfig
+++ b/drivers/phy/starfive/Kconfig
@@ -15,6 +15,16 @@ config PHY_STARFIVE_JH7110_DPHY_RX
system. If M is selected, the module will be called
phy-jh7110-dphy-rx.ko.

+config PHY_STARFIVE_JH7110_DPHY_TX
+ tristate "StarFive JH7110 D-PHY TX Support"
+ depends on HAS_IOMEM
+ select GENERIC_PHY
+ select GENERIC_PHY_MIPI_DPHY
+ help
+ Choose this option if you have a StarFive D-PHY TX in your
+ system. If M is selected, the module will be called
+ phy-jh7110-dphy-tx.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 b391018b7c47..eedc4a6fec15 100644
--- a/drivers/phy/starfive/Makefile
+++ b/drivers/phy/starfive/Makefile
@@ -1,4 +1,5 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_PHY_STARFIVE_JH7110_DPHY_RX) += phy-jh7110-dphy-rx.o
+obj-$(CONFIG_PHY_STARFIVE_JH7110_DPHY_TX) += phy-jh7110-dphy-tx.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-tx.c b/drivers/phy/starfive/phy-jh7110-dphy-tx.c
new file mode 100644
index 000000000000..69aa172563e4
--- /dev/null
+++ b/drivers/phy/starfive/phy-jh7110-dphy-tx.c
@@ -0,0 +1,542 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * DPHY TX driver for the StarFive JH7110 SoC
+ *
+ * Copyright (C) 2023 StarFive Technology Co., Ltd.
+ * Author: Keith Zhao <keith.zhao@starfivetech.com>
+ * Author: Shengyang Chen <shengyang.chen@starfivetech.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/phy/phy-mipi-dphy.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/regulator/consumer.h>
+#include <linux/reset.h>
+
+#define STF_DPHY_APBIFSAIF_SYSCFG(x) (x)
+
+#define STF_DPHY_AON_POWER_READY_N_SHIFT 0x0U
+#define STF_DPHY_AON_POWER_READY_N_MASK BIT(0)
+#define STF_DPHY_CFG_L0_SWAP_SEL_SHIFT 0xCU
+#define STF_DPHY_CFG_L0_SWAP_SEL_MASK GENMASK(14, 12)
+#define STF_DPHY_CFG_L1_SWAP_SEL_SHIFT 0xFU
+#define STF_DPHY_CFG_L1_SWAP_SEL_MASK GENMASK(17, 15)
+#define STF_DPHY_CFG_L2_SWAP_SEL_SHIFT 0x12U
+#define STF_DPHY_CFG_L2_SWAP_SEL_MASK GENMASK(20, 18)
+#define STF_DPHY_CFG_L3_SWAP_SEL_SHIFT 0x15U
+#define STF_DPHY_CFG_L3_SWAP_SEL_MASK GENMASK(23, 21)
+#define STF_DPHY_CFG_L4_SWAP_SEL_SHIFT 0x18U
+#define STF_DPHY_CFG_L4_SWAP_SEL_MASK GENMASK(26, 24)
+#define STF_DPHY_RGS_CDTX_PLL_UNLOCK_SHIFT 0x12U
+#define STF_DPHY_RGS_CDTX_PLL_UNLOCK_MASK BIT(18)
+#define STF_DPHY_RG_CDTX_L0N_HSTX_RES_SHIFT 0x13U
+#define STF_DPHY_RG_CDTX_L0N_HSTX_RES_MASK GENMASK(23, 19)
+#define STF_DPHY_RG_CDTX_L0P_HSTX_RES_SHIFT 0x18U
+#define STF_DPHY_RG_CDTX_L0P_HSTX_RES_MASK GENMASK(28, 24)
+
+#define STF_DPHY_RG_CDTX_L1P_HSTX_RES_SHIFT 0x5U
+#define STF_DPHY_RG_CDTX_L1P_HSTX_RES_MASK GENMASK(9, 5)
+#define STF_DPHY_RG_CDTX_L2N_HSTX_RES_SHIFT 0xAU
+#define STF_DPHY_RG_CDTX_L2N_HSTX_RES_MASK GENMASK(14, 10)
+#define STF_DPHY_RG_CDTX_L2P_HSTX_RES_SHIFT 0xFU
+#define STF_DPHY_RG_CDTX_L2P_HSTX_RES_MASK GENMASK(19, 15)
+#define STF_DPHY_RG_CDTX_L3N_HSTX_RES_SHIFT 0x14U
+#define STF_DPHY_RG_CDTX_L3N_HSTX_RES_MASK GENMASK(24, 20)
+#define STF_DPHY_RG_CDTX_L3P_HSTX_RES_SHIFT 0x19U
+#define STF_DPHY_RG_CDTX_L3P_HSTX_RES_MASK GENMASK(29, 25)
+
+#define STF_DPHY_RG_CDTX_L4N_HSTX_RES_SHIFT 0x0U
+#define STF_DPHY_RG_CDTX_L4N_HSTX_RES_MASK GENMASK(4, 0)
+#define STF_DPHY_RG_CDTX_L4P_HSTX_RES_SHIFT 0x5U
+#define STF_DPHY_RG_CDTX_L4P_HSTX_RES_MASK GENMASK(9, 5)
+#define STF_DPHY_RG_CDTX_PLL_FBK_FRA_SHIFT 0x0U
+#define STF_DPHY_RG_CDTX_PLL_FBK_FRA_MASK GENMASK(23, 0)
+
+#define STF_DPHY_RG_CDTX_PLL_FBK_INT_SHIFT 0x0U
+#define STF_DPHY_RG_CDTX_PLL_FBK_INT_MASK GENMASK(8, 0)
+#define STF_DPHY_RG_CDTX_PLL_FM_EN_SHIFT 0x9U
+#define STF_DPHY_RG_CDTX_PLL_FM_EN_MASK BIT(9)
+#define STF_DPHY_RG_CDTX_PLL_LDO_STB_X2_EN_SHIFT 0xAU
+#define STF_DPHY_RG_CDTX_PLL_LDO_STB_X2_EN_MASK BIT(10)
+#define STF_DPHY_RG_CDTX_PLL_PRE_DIV_SHIFT 0xBU
+#define STF_DPHY_RG_CDTX_PLL_PRE_DIV_MASK GENMASK(12, 11)
+
+#define STF_DPHY_RG_CDTX_PLL_SSC_EN_SHIFT 0x12U
+#define STF_DPHY_RG_CDTX_PLL_SSC_EN_MASK 0x40000U
+
+#define STF_DPHY_RG_CLANE_HS_CLK_POST_TIME_SHIFT 0x0U
+#define STF_DPHY_RG_CLANE_HS_CLK_POST_TIME_MASK GENMASK(7, 0)
+#define STF_DPHY_RG_CLANE_HS_CLK_PRE_TIME_SHIFT 0x8U
+#define STF_DPHY_RG_CLANE_HS_CLK_PRE_TIME_MASK GENMASK(15, 8)
+#define STF_DPHY_RG_CLANE_HS_PRE_TIME_SHIFT 0x10U
+#define STF_DPHY_RG_CLANE_HS_PRE_TIME_MASK GENMASK(23, 16)
+#define STF_DPHY_RG_CLANE_HS_TRAIL_TIME_SHIFT 0x18U
+#define STF_DPHY_RG_CLANE_HS_TRAIL_TIME_MASK GENMASK(31, 24)
+
+#define STF_DPHY_RG_CLANE_HS_ZERO_TIME_SHIFT 0x0U
+#define STF_DPHY_RG_CLANE_HS_ZERO_TIME_MASK GENMASK(7, 0)
+#define STF_DPHY_RG_DLANE_HS_PRE_TIME_SHIFT 0x8U
+#define STF_DPHY_RG_DLANE_HS_PRE_TIME_MASK GENMASK(15, 8)
+#define STF_DPHY_RG_DLANE_HS_TRAIL_TIME_SHIFT 0x10U
+#define STF_DPHY_RG_DLANE_HS_TRAIL_TIME_MASK GENMASK(23, 16)
+#define STF_DPHY_RG_DLANE_HS_ZERO_TIME_SHIFT 0x18U
+#define STF_DPHY_RG_DLANE_HS_ZERO_TIME_MASK GENMASK(31, 24)
+
+#define STF_DPHY_RG_EXTD_CYCLE_SEL_SHIFT 0x0U
+#define STF_DPHY_RG_EXTD_CYCLE_SEL_MASK GENMASK(2, 0)
+#define STF_DPHY_SCFG_C_HS_PRE_ZERO_TIME_SHIFT 0x0U
+#define STF_DPHY_SCFG_C_HS_PRE_ZERO_TIME_MASK GENMASK(31, 0)
+
+#define STF_DPHY_SCFG_DSI_TXREADY_ESC_SEL_SHIFT 0x1U
+#define STF_DPHY_SCFG_DSI_TXREADY_ESC_SEL_MASK GENMASK(2, 1)
+#define STF_DPHY_SCFG_PPI_C_READY_SEL_SHIFT 0x3U
+#define STF_DPHY_SCFG_PPI_C_READY_SEL_MASK GENMASK(4, 3)
+
+#define STF_DPHY_REFCLK_IN_SEL_SHIFT 0x1AU
+#define STF_DPHY_REFCLK_IN_SEL_MASK GENMASK(28, 26)
+#define STF_DPHY_RESETB_SHIFT 0x1DU
+#define STF_DPHY_RESETB_MASK BIT(29)
+
+#define STF_DPHY_REFCLK_12M 1
+#define STF_DPHY_BITRATE_ALIGN 10000000
+
+#define STF_MAP_LANES_NUM 5
+
+struct m31_dphy_config {
+ int ref_clk;
+ unsigned long bitrate;
+ u32 pll_prev_div;
+ u32 pll_fbk_int;
+ u32 pll_fbk_fra;
+ u32 extd_cycle_sel;
+ u32 dlane_hs_pre_time;
+ u32 dlane_hs_zero_time;
+ u32 dlane_hs_trail_time;
+ u32 clane_hs_pre_time;
+ u32 clane_hs_zero_time;
+ u32 clane_hs_trail_time;
+ u32 clane_hs_clk_pre_time;
+ u32 clane_hs_clk_post_time;
+};
+
+static const struct m31_dphy_config m31_dphy_configs[] = {
+ {12000000, 490000000, 0x0, 0xa3, 0x55 << 16 | 0x55 << 8 | 0x55,
+ 0x2, 0xc, 0x1d, 0x14, 0x8, 0x42, 0x12, 0x3, 0x28},
+ {12000000, 680000000, 0x0, 0x71, 0x55 << 16 | 0x55 << 8 | 0x55,
+ 0x1, 0x8, 0x13, 0xe, 0x5, 0x2e, 0xd, 0x1, 0x16},
+ {12000000, 750000000, 0x0, 0x7d, 0x0 << 16 | 0x0 << 8 | 0x0,
+ 0x1, 0x8, 0x16, 0xf, 0x6, 0x32, 0xe, 0x1, 0x17},
+ {12000000, 900000000, 0x0, 0x96, 0x0 << 16 | 0x0 << 8 | 0x0,
+ 0x1, 0xa, 0x19, 0x12, 0x8, 0x3c, 0x10, 0x1, 0x19},
+};
+
+struct stf_dphy_info {
+ /**
+ * @maps:
+ *
+ * Physical lanes and logic lanes mapping table.
+ *
+ * The default order is:
+ * [data lane 0, data lane 1, data lane 2, date lane 3, clk lane]
+ */
+ u8 maps[STF_MAP_LANES_NUM];
+};
+
+struct stf_dphy {
+ struct device *dev;
+ void __iomem *topsys;
+ struct clk *txesc_clk;
+ struct reset_control *sys_rst;
+ struct reset_control *txbytehs_rst;
+
+ struct phy_configure_opts_mipi_dphy config;
+
+ struct regulator *mipitx_1p8;
+ struct regulator *mipitx_0p9;
+
+ struct phy *phy;
+ const struct stf_dphy_info *info;
+};
+
+static inline u32 stf_dphy_get_reg(void *io_addr, u32 addr, u32 shift, u32 mask)
+{
+ u32 tmp;
+
+ tmp = readl(io_addr);
+ tmp = (tmp & mask) >> shift;
+ return tmp;
+}
+
+static inline void stf_dphy_set_reg(void *io_addr, u32 addr, u32 data, u32 shift, u32 mask)
+{
+ u32 tmp;
+
+ tmp = readl(io_addr + addr);
+ tmp &= ~mask;
+ tmp |= (data << shift) & mask;
+ writel(tmp, (io_addr + addr));
+}
+
+static int is_pll_locked(struct stf_dphy *dphy)
+{
+ int tmp = stf_dphy_get_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(8),
+ STF_DPHY_RGS_CDTX_PLL_UNLOCK_SHIFT,
+ STF_DPHY_RGS_CDTX_PLL_UNLOCK_MASK);
+ return !tmp;
+}
+
+static void stf_dphy_hw_reset(struct stf_dphy *dphy, int assert)
+{
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(100),
+ !assert, STF_DPHY_RESETB_SHIFT, STF_DPHY_RESETB_MASK);
+
+ if (!assert) {
+ /*the lock-in time of pll of M31 is 20us-50ms*/
+ while ((!is_pll_locked(dphy)) && msecs_to_jiffies(50))
+ ;
+ dev_err(dphy->dev, "MIPI dphy-tx # PLL Locked\n");
+ }
+}
+
+static int stf_dphy_configure(struct phy *phy, union phy_configure_opts *opts)
+{
+ struct stf_dphy *dphy;
+ u32 bitrate;
+ unsigned long alignment;
+ int i;
+ const struct m31_dphy_config *p;
+ const u32 STF_DPHY_AON_POWER_READY_N_active = 0;
+ const struct stf_dphy_info *info;
+
+ dphy = phy_get_drvdata(phy);
+ info = dphy->info;
+ bitrate = opts->mipi_dphy.hs_clk_rate;
+
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(8), 0x10,
+ STF_DPHY_RG_CDTX_L0N_HSTX_RES_SHIFT, STF_DPHY_RG_CDTX_L0N_HSTX_RES_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(12), 0x10,
+ STF_DPHY_RG_CDTX_L0N_HSTX_RES_SHIFT, STF_DPHY_RG_CDTX_L0N_HSTX_RES_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(12), 0x10,
+ STF_DPHY_RG_CDTX_L2N_HSTX_RES_SHIFT, STF_DPHY_RG_CDTX_L2N_HSTX_RES_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(12), 0x10,
+ STF_DPHY_RG_CDTX_L3N_HSTX_RES_SHIFT, STF_DPHY_RG_CDTX_L3N_HSTX_RES_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(16), 0x10,
+ STF_DPHY_RG_CDTX_L4N_HSTX_RES_SHIFT, STF_DPHY_RG_CDTX_L4N_HSTX_RES_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(8), 0x10,
+ STF_DPHY_RG_CDTX_L0P_HSTX_RES_SHIFT, STF_DPHY_RG_CDTX_L0P_HSTX_RES_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(12), 0x10,
+ STF_DPHY_RG_CDTX_L1P_HSTX_RES_SHIFT, STF_DPHY_RG_CDTX_L1P_HSTX_RES_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(12), 0x10,
+ STF_DPHY_RG_CDTX_L2P_HSTX_RES_SHIFT, STF_DPHY_RG_CDTX_L2P_HSTX_RES_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(12), 0x10,
+ STF_DPHY_RG_CDTX_L3P_HSTX_RES_SHIFT, STF_DPHY_RG_CDTX_L3P_HSTX_RES_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(16), 0x10,
+ STF_DPHY_RG_CDTX_L4P_HSTX_RES_SHIFT, STF_DPHY_RG_CDTX_L4P_HSTX_RES_MASK);
+
+ alignment = STF_DPHY_BITRATE_ALIGN;
+ if (bitrate % alignment)
+ bitrate += alignment - (bitrate % alignment);
+
+ p = m31_dphy_configs;
+ for (i = 0; i < ARRAY_SIZE(m31_dphy_configs); i++, p++) {
+ if (p->bitrate == bitrate) {
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(100),
+ STF_DPHY_REFCLK_12M, STF_DPHY_REFCLK_IN_SEL_SHIFT,
+ STF_DPHY_REFCLK_IN_SEL_MASK);
+
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(0),
+ STF_DPHY_AON_POWER_READY_N_active,
+ STF_DPHY_AON_POWER_READY_N_SHIFT,
+ STF_DPHY_AON_POWER_READY_N_MASK);
+
+ /*Lane setting*/
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(0), info->maps[0],
+ STF_DPHY_CFG_L0_SWAP_SEL_SHIFT,
+ STF_DPHY_CFG_L0_SWAP_SEL_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(0), info->maps[1],
+ STF_DPHY_CFG_L1_SWAP_SEL_SHIFT,
+ STF_DPHY_CFG_L1_SWAP_SEL_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(0), info->maps[2],
+ STF_DPHY_CFG_L2_SWAP_SEL_SHIFT,
+ STF_DPHY_CFG_L2_SWAP_SEL_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(0), info->maps[3],
+ STF_DPHY_CFG_L3_SWAP_SEL_SHIFT,
+ STF_DPHY_CFG_L3_SWAP_SEL_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(0), info->maps[4],
+ STF_DPHY_CFG_L4_SWAP_SEL_SHIFT,
+ STF_DPHY_CFG_L4_SWAP_SEL_MASK);
+ /*PLL setting*/
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(28), 0x0,
+ STF_DPHY_RG_CDTX_PLL_SSC_EN_SHIFT,
+ STF_DPHY_RG_CDTX_PLL_SSC_EN_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(24), 0x1,
+ STF_DPHY_RG_CDTX_PLL_LDO_STB_X2_EN_SHIFT,
+ STF_DPHY_RG_CDTX_PLL_LDO_STB_X2_EN_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(24), 0x1,
+ STF_DPHY_RG_CDTX_PLL_FM_EN_SHIFT,
+ STF_DPHY_RG_CDTX_PLL_FM_EN_MASK);
+
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(24),
+ p->pll_prev_div, STF_DPHY_RG_CDTX_PLL_PRE_DIV_SHIFT,
+ STF_DPHY_RG_CDTX_PLL_PRE_DIV_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(24),
+ p->pll_fbk_int, STF_DPHY_RG_CDTX_PLL_FBK_INT_SHIFT,
+ STF_DPHY_RG_CDTX_PLL_FBK_INT_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(20),
+ p->pll_fbk_fra, STF_DPHY_RG_CDTX_PLL_FBK_FRA_SHIFT,
+ STF_DPHY_RG_CDTX_PLL_FBK_FRA_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(40),
+ p->extd_cycle_sel, STF_DPHY_RG_EXTD_CYCLE_SEL_SHIFT,
+ STF_DPHY_RG_EXTD_CYCLE_SEL_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(36),
+ p->dlane_hs_pre_time,
+ STF_DPHY_RG_DLANE_HS_PRE_TIME_SHIFT,
+ STF_DPHY_RG_DLANE_HS_PRE_TIME_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(36),
+ p->dlane_hs_pre_time,
+ STF_DPHY_RG_DLANE_HS_PRE_TIME_SHIFT,
+ STF_DPHY_RG_DLANE_HS_PRE_TIME_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(36),
+ p->dlane_hs_zero_time,
+ STF_DPHY_RG_DLANE_HS_ZERO_TIME_SHIFT,
+ STF_DPHY_RG_DLANE_HS_ZERO_TIME_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(36),
+ p->dlane_hs_trail_time,
+ STF_DPHY_RG_DLANE_HS_TRAIL_TIME_SHIFT,
+ STF_DPHY_RG_DLANE_HS_TRAIL_TIME_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(32),
+ p->clane_hs_pre_time,
+ STF_DPHY_RG_CLANE_HS_PRE_TIME_SHIFT,
+ STF_DPHY_RG_CLANE_HS_PRE_TIME_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(36),
+ p->clane_hs_zero_time,
+ STF_DPHY_RG_CLANE_HS_ZERO_TIME_SHIFT,
+ STF_DPHY_RG_CLANE_HS_ZERO_TIME_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(32),
+ p->clane_hs_trail_time,
+ STF_DPHY_RG_CLANE_HS_TRAIL_TIME_SHIFT,
+ STF_DPHY_RG_CLANE_HS_TRAIL_TIME_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(32),
+ p->clane_hs_clk_pre_time,
+ STF_DPHY_RG_CLANE_HS_CLK_PRE_TIME_SHIFT,
+ STF_DPHY_RG_CLANE_HS_CLK_PRE_TIME_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(32),
+ p->clane_hs_clk_post_time,
+ STF_DPHY_RG_CLANE_HS_CLK_POST_TIME_SHIFT,
+ STF_DPHY_RG_CLANE_HS_CLK_POST_TIME_MASK);
+
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static int stf_dphy_init(struct phy *phy)
+{
+ struct stf_dphy *dphy = phy_get_drvdata(phy);
+ int ret;
+
+ stf_dphy_hw_reset(dphy, 0);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(48), 0,
+ STF_DPHY_SCFG_PPI_C_READY_SEL_SHIFT, STF_DPHY_SCFG_PPI_C_READY_SEL_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(48), 0,
+ STF_DPHY_SCFG_DSI_TXREADY_ESC_SEL_SHIFT,
+ STF_DPHY_SCFG_DSI_TXREADY_ESC_SEL_MASK);
+ stf_dphy_set_reg(dphy->topsys, STF_DPHY_APBIFSAIF_SYSCFG(44), 0x30,
+ STF_DPHY_SCFG_C_HS_PRE_ZERO_TIME_SHIFT,
+ STF_DPHY_SCFG_C_HS_PRE_ZERO_TIME_MASK);
+
+ ret = clk_prepare_enable(dphy->txesc_clk);
+ if (ret) {
+ dev_err(dphy->dev, "Failed to prepare/enable txesc_clk\n");
+ return ret;
+ }
+
+ ret = reset_control_deassert(dphy->sys_rst);
+ if (ret) {
+ dev_err(dphy->dev, "Failed to deassert sys_rst\n");
+ return ret;
+ }
+
+ ret = reset_control_deassert(dphy->txbytehs_rst);
+ if (ret < 0) {
+ dev_err(dphy->dev, "Failed to deassert txbytehs_rst\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int stf_dphy_exit(struct phy *phy)
+{
+ struct stf_dphy *dphy = phy_get_drvdata(phy);
+ int ret;
+
+ ret = reset_control_assert(dphy->txbytehs_rst);
+ if (ret < 0) {
+ dev_err(dphy->dev, "Failed to assert txbytehs_rst\n");
+ return ret;
+ }
+
+ ret = reset_control_assert(dphy->sys_rst);
+ if (ret) {
+ dev_err(dphy->dev, "Failed to assert sys_rst\n");
+ return ret;
+ }
+
+ clk_disable_unprepare(dphy->txesc_clk);
+
+ stf_dphy_hw_reset(dphy, 1);
+
+ 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->mipitx_0p9);
+ if (ret) {
+ dev_err(dphy->dev, "Cannot enable mipitx_0p9 regulator\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int stf_dphy_validate(struct phy *phy, enum phy_mode mode, int submode,
+ union phy_configure_opts *opts)
+{
+ if (mode != PHY_MODE_MIPI_DPHY)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int stf_dphy_power_off(struct phy *phy)
+{
+ struct stf_dphy *dphy = phy_get_drvdata(phy);
+
+ regulator_disable(dphy->mipitx_0p9);
+
+ pm_runtime_put_sync(dphy->dev);
+
+ return 0;
+}
+
+static const struct phy_ops stf_dphy_ops = {
+ .power_on = stf_dphy_power_on,
+ .power_off = stf_dphy_power_off,
+ .init = stf_dphy_init,
+ .exit = stf_dphy_exit,
+ .configure = stf_dphy_configure,
+ .validate = stf_dphy_validate,
+ .owner = THIS_MODULE,
+};
+
+static int stf_dphy_probe(struct platform_device *pdev)
+{
+ struct phy_provider *phy_provider;
+ struct stf_dphy *dphy;
+ int ret;
+
+ dphy = devm_kzalloc(&pdev->dev, sizeof(*dphy), GFP_KERNEL);
+ if (!dphy)
+ return -ENOMEM;
+
+ dphy->info = of_device_get_match_data(&pdev->dev);
+
+ dphy->dev = &pdev->dev;
+ dev_set_drvdata(&pdev->dev, dphy);
+
+ dphy->topsys = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(dphy->topsys)) {
+ ret = PTR_ERR(dphy->topsys);
+ return ret;
+ }
+
+ pm_runtime_enable(&pdev->dev);
+
+ dphy->mipitx_0p9 = devm_regulator_get(&pdev->dev, "mipi_0p9");
+ if (IS_ERR(dphy->mipitx_0p9)) {
+ ret = PTR_ERR(dphy->mipitx_0p9);
+ return ret;
+ }
+
+ dphy->txesc_clk = devm_clk_get(&pdev->dev, "dphy_txesc");
+ if (IS_ERR(dphy->txesc_clk)) {
+ ret = PTR_ERR(dphy->txesc_clk);
+ dev_err(&pdev->dev, "txesc_clk get error\n");
+ return ret;
+ }
+
+ dphy->sys_rst = reset_control_get_exclusive(&pdev->dev, "dphy_sys");
+ if (IS_ERR(dphy->sys_rst)) {
+ ret = PTR_ERR(dphy->sys_rst);
+ dev_err(&pdev->dev, "sys_rst get error\n");
+ return ret;
+ }
+
+ dphy->txbytehs_rst = reset_control_get_exclusive(&pdev->dev, "dsi_txbytehs");
+ if (IS_ERR(dphy->txbytehs_rst)) {
+ dev_err(&pdev->dev, "Failed to get txbytehs_rst\n");
+ return PTR_ERR(dphy->txbytehs_rst);
+ }
+
+ dphy->phy = devm_phy_create(&pdev->dev, NULL, &stf_dphy_ops);
+ if (IS_ERR(dphy->phy)) {
+ ret = PTR_ERR(dphy->phy);
+ dev_err(&pdev->dev, "Failed to create phy\n");
+ return ret;
+ }
+ phy_set_drvdata(dphy->phy, dphy);
+
+ phy_provider = devm_of_phy_provider_register(&pdev->dev, of_phy_simple_xlate);
+ if (IS_ERR(phy_provider)) {
+ ret = PTR_ERR(phy_provider);
+ dev_err(&pdev->dev, "Failed to create phy\n");
+ return ret;
+ }
+
+ return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static const struct stf_dphy_info starfive_dphy_info = {
+ .maps = {0, 1, 2, 3, 4},
+};
+
+static const struct of_device_id stf_dphy_dt_ids[] = {
+ {
+ .compatible = "starfive,jh7110-dphy-tx",
+ .data = &starfive_dphy_info,
+ },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, stf_dphy_dt_ids);
+
+static struct platform_driver stf_dphy_driver = {
+ .driver = {
+ .name = "starfive-dphy-tx",
+ .of_match_table = stf_dphy_dt_ids,
+ },
+ .probe = stf_dphy_probe,
+};
+module_platform_driver(stf_dphy_driver);
+
+MODULE_AUTHOR("Keith Zhao <keith.zhao@starfivetech.com>");
+MODULE_AUTHOR("Shengyang Chen <shengyang.chen@starfivetech.com>");
+MODULE_DESCRIPTION("StarFive JH7110 DPHY TX driver");
+MODULE_LICENSE("GPL");
--
2.17.1