On 18/08/2019 15:42, Beniamino Galvani wrote:
> This adds support for the USB PHY found on Amlogic GXBB SoCs.
>
> Signed-off-by: Beniamino Galvani <b.galv...@gmail.com>
> ---
> drivers/phy/Kconfig | 8 ++
> drivers/phy/Makefile | 1 +
> drivers/phy/meson-gxbb-usb2.c | 235 ++++++++++++++++++++++++++++++++++
> 3 files changed, 244 insertions(+)
> create mode 100644 drivers/phy/meson-gxbb-usb2.c
>
> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> index 3942f035eb..2190f6f970 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 3157f1b7ee..dde3b0ecef 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 0000000000..88c2ec69b2
> --- /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.blumensti...@googlemail.com>
> + * Copyright (C) 2018 BayLibre, SAS
> + *
> + * Author: Beniamino Galvani <b.galv...@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),
> +};
>
Reviewed-by: Neil Armstrong <narmstr...@baylibre.com>
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