diff options
Diffstat (limited to 'drivers/phy')
| -rw-r--r-- | drivers/phy/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/phy/Makefile | 1 | ||||
| -rw-r--r-- | drivers/phy/meson-gxbb-usb2.c | 235 |
3 files changed, 244 insertions, 0 deletions
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index a72f34f0d48..1e38c8741f0 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -154,6 +154,14 @@ config PHY_STM32_USBPHYC between an HS USB OTG controller and an HS USB Host controller, selected by an USB switch. +config MESON_GXBB_USB_PHY + bool "Amlogic Meson GXBB USB PHY" + depends on PHY && ARCH_MESON && MESON_GXBB + imply REGMAP + help + This is the generic phy driver for the Amlogic Meson GXBB + USB2 PHY. + config MESON_GXL_USB_PHY bool "Amlogic Meson GXL USB PHYs" depends on PHY && ARCH_MESON && (MESON_GXL || MESON_GXM) diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index 43ce62e08cd..74e8d931d38 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -16,6 +16,7 @@ obj-$(CONFIG_STI_USB_PHY) += sti_usb_phy.o obj-$(CONFIG_PHY_RCAR_GEN2) += phy-rcar-gen2.o obj-$(CONFIG_PHY_RCAR_GEN3) += phy-rcar-gen3.o obj-$(CONFIG_PHY_STM32_USBPHYC) += phy-stm32-usbphyc.o +obj-$(CONFIG_MESON_GXBB_USB_PHY) += meson-gxbb-usb2.o obj-$(CONFIG_MESON_GXL_USB_PHY) += meson-gxl-usb2.o meson-gxl-usb3.o obj-$(CONFIG_MESON_G12A_USB_PHY) += meson-g12a-usb2.o meson-g12a-usb3-pcie.o obj-$(CONFIG_MSM8916_USB_PHY) += msm8916-usbh-phy.o diff --git a/drivers/phy/meson-gxbb-usb2.c b/drivers/phy/meson-gxbb-usb2.c new file mode 100644 index 00000000000..88c2ec69b22 --- /dev/null +++ b/drivers/phy/meson-gxbb-usb2.c @@ -0,0 +1,235 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Meson8, Meson8b and GXBB USB2 PHY driver + * + * Copyright (C) 2016 Martin Blumenstingl <martin.blumenstingl@googlemail.com> + * Copyright (C) 2018 BayLibre, SAS + * + * Author: Beniamino Galvani <b.galvani@gmail.com> + */ + +#include <common.h> +#include <clk.h> +#include <dm.h> +#include <generic-phy.h> +#include <power/regulator.h> +#include <regmap.h> +#include <reset.h> + +#define REG_CONFIG 0x00 + #define REG_CONFIG_CLK_EN BIT(0) + #define REG_CONFIG_CLK_SEL_MASK GENMASK(3, 1) + #define REG_CONFIG_CLK_DIV_MASK GENMASK(10, 4) + #define REG_CONFIG_CLK_32k_ALTSEL BIT(15) + #define REG_CONFIG_TEST_TRIG BIT(31) + +#define REG_CTRL 0x04 + #define REG_CTRL_SOFT_PRST BIT(0) + #define REG_CTRL_SOFT_HRESET BIT(1) + #define REG_CTRL_SS_SCALEDOWN_MODE_MASK GENMASK(3, 2) + #define REG_CTRL_CLK_DET_RST BIT(4) + #define REG_CTRL_INTR_SEL BIT(5) + #define REG_CTRL_CLK_DETECTED BIT(8) + #define REG_CTRL_SOF_SENT_RCVD_TGL BIT(9) + #define REG_CTRL_SOF_TOGGLE_OUT BIT(10) + #define REG_CTRL_POWER_ON_RESET BIT(15) + #define REG_CTRL_SLEEPM BIT(16) + #define REG_CTRL_TX_BITSTUFF_ENN_H BIT(17) + #define REG_CTRL_TX_BITSTUFF_ENN BIT(18) + #define REG_CTRL_COMMON_ON BIT(19) + #define REG_CTRL_REF_CLK_SEL_MASK GENMASK(21, 20) + #define REG_CTRL_REF_CLK_SEL_SHIFT 20 + #define REG_CTRL_FSEL_MASK GENMASK(24, 22) + #define REG_CTRL_FSEL_SHIFT 22 + #define REG_CTRL_PORT_RESET BIT(25) + #define REG_CTRL_THREAD_ID_MASK GENMASK(31, 26) + +/* bits [31:26], [24:21] and [15:3] seem to be read-only */ +#define REG_ADP_BC 0x0c + #define REG_ADP_BC_VBUS_VLD_EXT_SEL BIT(0) + #define REG_ADP_BC_VBUS_VLD_EXT BIT(1) + #define REG_ADP_BC_OTG_DISABLE BIT(2) + #define REG_ADP_BC_ID_PULLUP BIT(3) + #define REG_ADP_BC_DRV_VBUS BIT(4) + #define REG_ADP_BC_ADP_PRB_EN BIT(5) + #define REG_ADP_BC_ADP_DISCHARGE BIT(6) + #define REG_ADP_BC_ADP_CHARGE BIT(7) + #define REG_ADP_BC_SESS_END BIT(8) + #define REG_ADP_BC_DEVICE_SESS_VLD BIT(9) + #define REG_ADP_BC_B_VALID BIT(10) + #define REG_ADP_BC_A_VALID BIT(11) + #define REG_ADP_BC_ID_DIG BIT(12) + #define REG_ADP_BC_VBUS_VALID BIT(13) + #define REG_ADP_BC_ADP_PROBE BIT(14) + #define REG_ADP_BC_ADP_SENSE BIT(15) + #define REG_ADP_BC_ACA_ENABLE BIT(16) + #define REG_ADP_BC_DCD_ENABLE BIT(17) + #define REG_ADP_BC_VDAT_DET_EN_B BIT(18) + #define REG_ADP_BC_VDAT_SRC_EN_B BIT(19) + #define REG_ADP_BC_CHARGE_SEL BIT(20) + #define REG_ADP_BC_CHARGE_DETECT BIT(21) + #define REG_ADP_BC_ACA_PIN_RANGE_C BIT(22) + #define REG_ADP_BC_ACA_PIN_RANGE_B BIT(23) + #define REG_ADP_BC_ACA_PIN_RANGE_A BIT(24) + #define REG_ADP_BC_ACA_PIN_GND BIT(25) + #define REG_ADP_BC_ACA_PIN_FLOAT BIT(26) + +#define RESET_COMPLETE_TIME 500 +#define ACA_ENABLE_COMPLETE_TIME 50 + +struct phy_meson_gxbb_usb2_priv { + struct regmap *regmap; + struct reset_ctl_bulk resets; +#if CONFIG_IS_ENABLED(DM_REGULATOR) + struct udevice *phy_supply; +#endif +}; + +static int phy_meson_gxbb_usb2_power_on(struct phy *phy) +{ + struct udevice *dev = phy->dev; + struct phy_meson_gxbb_usb2_priv *priv = dev_get_priv(dev); + uint val; + +#if CONFIG_IS_ENABLED(DM_REGULATOR) + if (priv->phy_supply) { + int ret = regulator_set_enable(priv->phy_supply, true); + + if (ret) + return ret; + } +#endif + + regmap_update_bits(priv->regmap, REG_CONFIG, + REG_CONFIG_CLK_32k_ALTSEL, + REG_CONFIG_CLK_32k_ALTSEL); + regmap_update_bits(priv->regmap, REG_CTRL, + REG_CTRL_REF_CLK_SEL_MASK, + 0x2 << REG_CTRL_REF_CLK_SEL_SHIFT); + regmap_update_bits(priv->regmap, REG_CTRL, + REG_CTRL_FSEL_MASK, + 0x5 << REG_CTRL_FSEL_SHIFT); + + /* reset the PHY */ + regmap_update_bits(priv->regmap, REG_CTRL, + REG_CTRL_POWER_ON_RESET, + REG_CTRL_POWER_ON_RESET); + udelay(RESET_COMPLETE_TIME); + regmap_update_bits(priv->regmap, REG_CTRL, + REG_CTRL_POWER_ON_RESET, + 0); + udelay(RESET_COMPLETE_TIME); + + regmap_update_bits(priv->regmap, REG_CTRL, + REG_CTRL_SOF_TOGGLE_OUT, + REG_CTRL_SOF_TOGGLE_OUT); + + /* Set host mode */ + regmap_update_bits(priv->regmap, REG_ADP_BC, + REG_ADP_BC_ACA_ENABLE, + REG_ADP_BC_ACA_ENABLE); + udelay(ACA_ENABLE_COMPLETE_TIME); + + regmap_read(priv->regmap, REG_ADP_BC, &val); + if (val & REG_ADP_BC_ACA_PIN_FLOAT) { + pr_err("Error powering on GXBB USB PHY\n"); + return -EINVAL; + } + + return 0; +} + +static int phy_meson_gxbb_usb2_power_off(struct phy *phy) +{ +#if CONFIG_IS_ENABLED(DM_REGULATOR) + struct udevice *dev = phy->dev; + struct phy_meson_gxbb_usb2_priv *priv = dev_get_priv(dev); + + if (priv->phy_supply) { + int ret = regulator_set_enable(priv->phy_supply, false); + + if (ret) + return ret; + } +#endif + + return 0; +} + +static struct phy_ops meson_gxbb_usb2_phy_ops = { + .power_on = phy_meson_gxbb_usb2_power_on, + .power_off = phy_meson_gxbb_usb2_power_off, +}; + +static int meson_gxbb_usb2_phy_probe(struct udevice *dev) +{ + struct phy_meson_gxbb_usb2_priv *priv = dev_get_priv(dev); + struct clk clk_usb_general, clk_usb; + int ret; + + ret = regmap_init_mem(dev_ofnode(dev), &priv->regmap); + if (ret) + return ret; + + ret = clk_get_by_name(dev, "usb_general", &clk_usb_general); + if (ret) + return ret; + + ret = clk_enable(&clk_usb_general); + if (ret && ret != -ENOSYS && ret != -ENOTSUPP) { + pr_err("Failed to enable PHY general clock\n"); + return ret; + } + + ret = clk_get_by_name(dev, "usb", &clk_usb); + if (ret) + return ret; + + ret = clk_enable(&clk_usb); + if (ret && ret != -ENOSYS && ret != -ENOTSUPP) { + pr_err("Failed to enable PHY clock\n"); + return ret; + } + +#if CONFIG_IS_ENABLED(DM_REGULATOR) + ret = device_get_supply_regulator(dev, "phy-supply", &priv->phy_supply); + if (ret && ret != -ENOENT) { + pr_err("Failed to get PHY regulator\n"); + return ret; + } +#endif + ret = reset_get_bulk(dev, &priv->resets); + if (!ret) { + ret = reset_deassert_bulk(&priv->resets); + if (ret) { + pr_err("Failed to deassert reset\n"); + return ret; + } + } + + return 0; +} + +static int meson_gxbb_usb2_phy_remove(struct udevice *dev) +{ + struct phy_meson_gxbb_usb2_priv *priv = dev_get_priv(dev); + + return reset_release_bulk(&priv->resets); +} + +static const struct udevice_id meson_gxbb_usb2_phy_ids[] = { + { .compatible = "amlogic,meson8-usb2-phy" }, + { .compatible = "amlogic,meson8b-usb2-phy" }, + { .compatible = "amlogic,meson-gxbb-usb2-phy" }, + { } +}; + +U_BOOT_DRIVER(meson_gxbb_usb2_phy) = { + .name = "meson_gxbb_usb2_phy", + .id = UCLASS_PHY, + .of_match = meson_gxbb_usb2_phy_ids, + .probe = meson_gxbb_usb2_phy_probe, + .remove = meson_gxbb_usb2_phy_remove, + .ops = &meson_gxbb_usb2_phy_ops, + .priv_auto_alloc_size = sizeof(struct phy_meson_gxbb_usb2_priv), +}; |