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.galvani@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 GXBBUSB2 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.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),
+};
Reviewed-by: Neil Armstrong narmstrong@baylibre.com