+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Meson GXL USB3 PHY driver
- *
- * Copyright (C) 2018 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
- * Copyright (C) 2018 BayLibre, SAS
- * Author: Neil Armstrong <narmstron@baylibre.com>
- */
-
-#include <common.h>
-#include <malloc.h>
-#include <asm/io.h>
-#include <bitfield.h>
-#include <dm.h>
-#include <errno.h>
-#include <generic-phy.h>
-#include <regmap.h>
-#include <clk.h>
-#include <linux/usb/otg.h>
-
-#include <asm/arch/usb-gx.h>
-
-#include <linux/bitops.h>
-#include <linux/compat.h>
-#include <linux/bitfield.h>
-
-#define USB_R0 0x00
- #define USB_R0_P30_FSEL_MASK GENMASK(5, 0)
- #define USB_R0_P30_PHY_RESET BIT(6)
- #define USB_R0_P30_TEST_POWERDOWN_HSP BIT(7)
- #define USB_R0_P30_TEST_POWERDOWN_SSP BIT(8)
- #define USB_R0_P30_ACJT_LEVEL_MASK GENMASK(13, 9)
- #define USB_R0_P30_TX_BOOST_LEVEL_MASK GENMASK(16, 14)
- #define USB_R0_P30_LANE0_TX2RX_LOOPBACK BIT(17)
- #define USB_R0_P30_LANE0_EXT_PCLK_REQ BIT(18)
- #define USB_R0_P30_PCS_RX_LOS_MASK_VAL_MASK GENMASK(28, 19)
- #define USB_R0_U2D_SS_SCALEDOWN_MODE_MASK GENMASK(30, 29)
- #define USB_R0_U2D_ACT BIT(31)
-
-#define USB_R1 0x04
- #define USB_R1_U3H_BIGENDIAN_GS BIT(0)
- #define USB_R1_U3H_PME_ENABLE BIT(1)
- #define USB_R1_U3H_HUB_PORT_OVERCURRENT_MASK GENMASK(6, 2)
- #define USB_R1_U3H_HUB_PORT_PERM_ATTACH_MASK GENMASK(11, 7)
- #define USB_R1_U3H_HOST_U2_PORT_DISABLE_MASK GENMASK(15, 12)
- #define USB_R1_U3H_HOST_U3_PORT_DISABLE BIT(16)
- #define USB_R1_U3H_HOST_PORT_POWER_CONTROL_PRESENT BIT(17)
- #define USB_R1_U3H_HOST_MSI_ENABLE BIT(18)
- #define USB_R1_U3H_FLADJ_30MHZ_REG_MASK GENMASK(24, 19)
- #define USB_R1_P30_PCS_TX_SWING_FULL_MASK GENMASK(31, 25)
-
-#define USB_R2 0x08
- #define USB_R2_P30_CR_DATA_IN_MASK GENMASK(15, 0)
- #define USB_R2_P30_CR_READ BIT(16)
- #define USB_R2_P30_CR_WRITE BIT(17)
- #define USB_R2_P30_CR_CAP_ADDR BIT(18)
- #define USB_R2_P30_CR_CAP_DATA BIT(19)
- #define USB_R2_P30_PCS_TX_DEEMPH_3P5DB_MASK GENMASK(25, 20)
- #define USB_R2_P30_PCS_TX_DEEMPH_6DB_MASK GENMASK(31, 26)
-
-#define USB_R3 0x0c
- #define USB_R3_P30_SSC_ENABLE BIT(0)
- #define USB_R3_P30_SSC_RANGE_MASK GENMASK(3, 1)
- #define USB_R3_P30_SSC_REF_CLK_SEL_MASK GENMASK(12, 4)
- #define USB_R3_P30_REF_SSP_EN BIT(13)
- #define USB_R3_P30_LOS_BIAS_MASK GENMASK(18, 16)
- #define USB_R3_P30_LOS_LEVEL_MASK GENMASK(23, 19)
- #define USB_R3_P30_MPLL_MULTIPLIER_MASK GENMASK(30, 24)
-
-#define USB_R4 0x10
- #define USB_R4_P21_PORT_RESET_0 BIT(0)
- #define USB_R4_P21_SLEEP_M0 BIT(1)
- #define USB_R4_MEM_PD_MASK GENMASK(3, 2)
- #define USB_R4_P21_ONLY BIT(4)
-
-#define USB_R5 0x14
- #define USB_R5_ID_DIG_SYNC BIT(0)
- #define USB_R5_ID_DIG_REG BIT(1)
- #define USB_R5_ID_DIG_CFG_MASK GENMASK(3, 2)
- #define USB_R5_ID_DIG_EN_0 BIT(4)
- #define USB_R5_ID_DIG_EN_1 BIT(5)
- #define USB_R5_ID_DIG_CURR BIT(6)
- #define USB_R5_ID_DIG_IRQ BIT(7)
- #define USB_R5_ID_DIG_TH_MASK GENMASK(15, 8)
- #define USB_R5_ID_DIG_CNT_MASK GENMASK(23, 16)
-
-/* read-only register */
-#define USB_R6 0x18
- #define USB_R6_P30_CR_DATA_OUT_MASK GENMASK(15, 0)
- #define USB_R6_P30_CR_ACK BIT(16)
-
-struct phy_meson_gxl_usb3_priv {
- struct regmap *regmap;
-#if CONFIG_IS_ENABLED(CLK)
- struct clk clk;
-#endif
-};
-
-void phy_meson_gxl_usb3_set_mode(struct phy *phy, enum usb_dr_mode mode)
-{
- struct udevice *dev = phy->dev;
- struct phy_meson_gxl_usb3_priv *priv = dev_get_priv(dev);
- uint val;
-
- switch (mode) {
- case USB_DR_MODE_UNKNOWN:
- case USB_DR_MODE_HOST:
- case USB_DR_MODE_OTG:
- regmap_read(priv->regmap, USB_R0, &val);
- val &= ~USB_R0_U2D_ACT;
- regmap_write(priv->regmap, USB_R0, val);
-
- regmap_read(priv->regmap, USB_R4, &val);
- val &= ~USB_R4_P21_SLEEP_M0;
- regmap_write(priv->regmap, USB_R4, val);
- break;
-
- case USB_DR_MODE_PERIPHERAL:
- regmap_read(priv->regmap, USB_R0, &val);
- val |= USB_R0_U2D_ACT;
- regmap_write(priv->regmap, USB_R0, val);
-
- regmap_read(priv->regmap, USB_R4, &val);
- val |= USB_R4_P21_SLEEP_M0;
- regmap_write(priv->regmap, USB_R4, val);
- break;
- }
-}
-
-static int phy_meson_gxl_usb3_power_on(struct phy *phy)
-{
- struct udevice *dev = phy->dev;
- struct phy_meson_gxl_usb3_priv *priv = dev_get_priv(dev);
- uint val;
-
- regmap_read(priv->regmap, USB_R5, &val);
- val |= USB_R5_ID_DIG_EN_0;
- val |= USB_R5_ID_DIG_EN_1;
- val &= ~USB_R5_ID_DIG_TH_MASK;
- val |= FIELD_PREP(USB_R5_ID_DIG_TH_MASK, 0xff);
- regmap_write(priv->regmap, USB_R5, val);
-
- phy_meson_gxl_usb3_set_mode(phy, USB_DR_MODE_HOST);
-
- return 0;
-}
-
-static int phy_meson_gxl_usb3_power_off(struct phy *phy)
-{
- struct udevice *dev = phy->dev;
- struct phy_meson_gxl_usb3_priv *priv = dev_get_priv(dev);
- uint val;
-
- regmap_read(priv->regmap, USB_R5, &val);
- val &= ~USB_R5_ID_DIG_EN_0;
- val &= ~USB_R5_ID_DIG_EN_1;
- regmap_write(priv->regmap, USB_R5, val);
-
- return 0;
-}
-
-static int phy_meson_gxl_usb3_init(struct phy *phy)
-{
- struct udevice *dev = phy->dev;
- struct phy_meson_gxl_usb3_priv *priv = dev_get_priv(dev);
- uint val;
-
- regmap_read(priv->regmap, USB_R1, &val);
- val &= ~USB_R1_U3H_FLADJ_30MHZ_REG_MASK;
- val |= FIELD_PREP(USB_R1_U3H_FLADJ_30MHZ_REG_MASK, 0x20);
- regmap_write(priv->regmap, USB_R1, val);
-
- return 0;
-}
-
-struct phy_ops meson_gxl_usb3_phy_ops = {
- .init = phy_meson_gxl_usb3_init,
- .power_on = phy_meson_gxl_usb3_power_on,
- .power_off = phy_meson_gxl_usb3_power_off,
-};
-
-int meson_gxl_usb3_phy_probe(struct udevice *dev)
-{
- struct phy_meson_gxl_usb3_priv *priv = dev_get_priv(dev);
- int ret;
-
- ret = regmap_init_mem(dev_ofnode(dev), &priv->regmap);
- if (ret)
- return ret;
-
-#if CONFIG_IS_ENABLED(CLK)
- ret = clk_get_by_index(dev, 0, &priv->clk);
- if (ret < 0)
- return ret;
-
- ret = clk_enable(&priv->clk);
- if (ret && ret != -ENOSYS && ret != -ENOTSUPP) {
- pr_err("failed to enable PHY clock\n");
- clk_free(&priv->clk);
- return ret;
- }
-#endif
-
- return 0;
-}
-
-static const struct udevice_id meson_gxl_usb3_phy_ids[] = {
- { .compatible = "amlogic,meson-gxl-usb3-phy" },
- { }
-};
-
-U_BOOT_DRIVER(meson_gxl_usb3_phy) = {
- .name = "meson_gxl_usb3_phy",
- .id = UCLASS_PHY,
- .of_match = meson_gxl_usb3_phy_ids,
- .probe = meson_gxl_usb3_phy_probe,
- .ops = &meson_gxl_usb3_phy_ops,
- .priv_auto_alloc_size = sizeof(struct phy_meson_gxl_usb3_priv),
-};
projects / u-boot.git / commitdiff
