The USB support was initialy done with a set of PHYs and dwc3-of-simple
because the architecture of the USB complex was not understood correctly
at the time (and proper documentation was missing...).
But with the G12A family, the USB complex was correctly understood and
implemented correctly.
This adds a proper driver for the glue, based on the G12A one, but with
enough changes to require a different driver in U-Boot.
Signed-off-by: Neil Armstrong <narmstr...@baylibre.com>
---
arch/arm/include/asm/arch-meson/usb-gx.h | 2 +
drivers/usb/dwc3/Kconfig | 8 +
drivers/usb/dwc3/Makefile | 1 +
drivers/usb/dwc3/dwc3-meson-gxl.c | 425 +++++++++++++++++++++++
4 files changed, 436 insertions(+)
create mode 100644 drivers/usb/dwc3/dwc3-meson-gxl.c
diff --git a/arch/arm/include/asm/arch-meson/usb-gx.h
b/arch/arm/include/asm/arch-meson/usb-gx.h
index aeb8e0c673..7200a4c31a 100644
--- a/arch/arm/include/asm/arch-meson/usb-gx.h
+++ b/arch/arm/include/asm/arch-meson/usb-gx.h
@@ -13,4 +13,6 @@
void phy_meson_gxl_usb2_set_mode(struct phy *phy, enum usb_dr_mode mode);
void phy_meson_gxl_usb3_set_mode(struct phy *phy, enum usb_dr_mode mode);
+int dwc3_meson_gxl_force_mode(struct udevice *dev, enum usb_dr_mode mode);
+
#endif
diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index c302486291..802ee508d9 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -38,6 +38,14 @@ config USB_DWC3_MESON_G12A
Select this for Amlogic Meson G12A Platforms.
This wrapper supports Host and Peripheral operation modes.
+config USB_DWC3_MESON_GXL
+ bool "Amlogic Meson GXL USB wrapper"
+ depends on DM_USB && USB_DWC3 && ARCH_MESON
+ imply PHY
+ help
+ Select this for Amlogic Meson GXL and GXM Platforms.
+ This wrapper supports Host and Peripheral operation modes.
+
config USB_DWC3_UNIPHIER
bool "DesignWare USB3 Host Support on UniPhier Platforms"
depends on ARCH_UNIPHIER && USB_XHCI_DWC3
diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile
index 0b652a6f36..6e3e024e97 100644
--- a/drivers/usb/dwc3/Makefile
+++ b/drivers/usb/dwc3/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_USB_DWC3_GADGET) += gadget.o ep0.o
obj-$(CONFIG_USB_DWC3_OMAP) += dwc3-omap.o
obj-$(CONFIG_USB_DWC3_MESON_G12A) += dwc3-meson-g12a.o
+obj-$(CONFIG_USB_DWC3_MESON_GXL) += dwc3-meson-gxl.o
obj-$(CONFIG_USB_DWC3_GENERIC) += dwc3-generic.o
obj-$(CONFIG_USB_DWC3_UNIPHIER) += dwc3-uniphier.o
obj-$(CONFIG_USB_DWC3_PHY_OMAP) += ti_usb_phy.o
diff --git a/drivers/usb/dwc3/dwc3-meson-gxl.c
b/drivers/usb/dwc3/dwc3-meson-gxl.c
new file mode 100644
index 0000000000..92ee0866f7
--- /dev/null
+++ b/drivers/usb/dwc3/dwc3-meson-gxl.c
@@ -0,0 +1,425 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Amlogic GXL DWC3 Glue layer
+ *
+ * Copyright (C) 2019 BayLibre, SAS
+ * Author: Neil Armstrong <narmstr...@baylibre.com>
+ */
+
+#define DEBUG
+#include <common.h>
+#include <asm-generic/io.h>
+#include <dm.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+#include <dwc3-uboot.h>
+#include <generic-phy.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <malloc.h>
+#include <regmap.h>
+#include <usb.h>
+#include "core.h"
+#include "gadget.h"
+#include <reset.h>
+#include <clk.h>
+#include <power/regulator.h>
+#include <linux/bitfield.h>
+#include <linux/bitops.h>
+#include <linux/compat.h>
+#include <asm/arch/usb-gx.h>
+
+/* USB Glue Control Registers */
+
+#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)
+
+enum {
+ USB2_HOST_PHY0 = 0,
+ USB2_OTG_PHY1,
+ USB2_HOST_PHY2,
+ PHY_COUNT,
+};
+
+static const char *phy_names[PHY_COUNT] = {
+ "usb2-phy0", "usb2-phy1", "usb2-phy2",
+};
+
+struct dwc3_meson_gxl {
+ struct udevice *dev;
+ struct regmap *regmap;
+ struct clk clk;
+ struct reset_ctl reset;
+ struct phy phys[PHY_COUNT];
+ enum usb_dr_mode otg_mode;
+ enum usb_dr_mode otg_phy_mode;
+ unsigned int usb2_ports;
+#if CONFIG_IS_ENABLED(DM_REGULATOR)
+ struct udevice *vbus_supply;
+#endif
+};
+
+#define U2P_REG_SIZE 0x20
+#define USB_REG_OFFSET 0x80
+
+#define USB2_OTG_PHY USB2_OTG_PHY1
+
+static void dwc3_meson_gxl_usb2_set_mode(struct dwc3_meson_gxl *priv, enum
usb_dr_mode mode)
+{
+ switch (mode) {
+ case USB_DR_MODE_HOST:
+ case USB_DR_MODE_OTG:
+ case USB_DR_MODE_UNKNOWN:
+ regmap_update_bits(priv->regmap, USB_R1,
+ USB_R1_U3H_HOST_U2_PORT_DISABLE_MASK, 0);
+ regmap_update_bits(priv->regmap, USB_R0,
+ USB_R0_U2D_ACT, 0);
+ regmap_update_bits(priv->regmap, USB_R4,
+ USB_R4_P21_SLEEP_M0, 0);
+ break;
+
+ case USB_DR_MODE_PERIPHERAL:
+ regmap_update_bits(priv->regmap, USB_R0,
+ USB_R0_U2D_ACT, USB_R0_U2D_ACT);
+ regmap_update_bits(priv->regmap, USB_R0,
+ USB_R0_U2D_SS_SCALEDOWN_MODE_MASK, 0);
+ regmap_update_bits(priv->regmap, USB_R4,
+ USB_R4_P21_SLEEP_M0, USB_R4_P21_SLEEP_M0);
+ break;
+ }
+}
+
+static int dwc3_meson_gxl_usb2_init(struct dwc3_meson_gxl *priv)
+{
+ int i;
+
+ for (i = 0; i < PHY_COUNT; ++i) {
+ if (!priv->phys[i].dev)
+ continue;
+
+ phy_meson_gxl_usb2_set_mode(&priv->phys[i],
+ (i == USB2_OTG_PHY) ? USB_DR_MODE_PERIPHERAL
+ : USB_DR_MODE_HOST);
+ }
+
+ return 0;
+}
+
+static int dwc3_meson_gxl_usb_init(struct dwc3_meson_gxl *priv)
+{
+ int ret;
+
+ ret = dwc3_meson_gxl_usb2_init(priv);
+ if (ret)
+ return ret;
+
+ regmap_update_bits(priv->regmap, USB_R1,
+ USB_R1_U3H_FLADJ_30MHZ_REG_MASK,
+ FIELD_PREP(USB_R1_U3H_FLADJ_30MHZ_REG_MASK, 0x20));
+
+ regmap_update_bits(priv->regmap, USB_R5,
+ USB_R5_ID_DIG_EN_0,
+ USB_R5_ID_DIG_EN_0);
+ regmap_update_bits(priv->regmap, USB_R5,
+ USB_R5_ID_DIG_EN_1,
+ USB_R5_ID_DIG_EN_1);
+ regmap_update_bits(priv->regmap, USB_R5,
+ USB_R5_ID_DIG_TH_MASK,
+ FIELD_PREP(USB_R5_ID_DIG_TH_MASK, 0xff));
+
+ dwc3_meson_gxl_usb2_set_mode(priv, priv->otg_phy_mode);
+
+ return 0;
+}
+
+int dwc3_meson_gxl_force_mode(struct udevice *dev, enum usb_dr_mode mode)
+{
+ struct dwc3_meson_gxl *priv = dev_get_platdata(dev);
+
+ if (!priv)
+ return -EINVAL;
+
+ if (mode != USB_DR_MODE_HOST && mode != USB_DR_MODE_PERIPHERAL)
+ return -EINVAL;
+
+ if (!priv->phys[USB2_OTG_PHY].dev)
+ return -EINVAL;
+
+ if (mode == priv->otg_phy_mode)
+ return 0;
+
+ if (mode == USB_DR_MODE_HOST)
+ debug("%s: switching to Host Mode\n", __func__);
+ else
+ debug("%s: switching to Device Mode\n", __func__);
+
+#if CONFIG_IS_ENABLED(DM_REGULATOR)
+ if (priv->vbus_supply) {
+ int ret = regulator_set_enable(priv->vbus_supply,
+ (mode == USB_DR_MODE_PERIPHERAL));
+ if (ret)
+ return ret;
+ }
+#endif
+ priv->otg_phy_mode = mode;
+
+ phy_meson_gxl_usb2_set_mode(&priv->phys[USB2_OTG_PHY], mode);
+
+ dwc3_meson_gxl_usb2_set_mode(priv, mode);
+
+ return 0;
+}
+
+static int dwc3_meson_gxl_get_phys(struct dwc3_meson_gxl *priv)
+{
+ int i, ret;
+
+ for (i = 0 ; i < PHY_COUNT ; ++i) {
+ ret = generic_phy_get_by_name(priv->dev, phy_names[i],
+ &priv->phys[i]);
+ if (ret == -ENOENT || ret == -ENODATA) {
+ priv->phys[i].dev = NULL;
+ continue;
+ }
+
+ if (ret)
+ return ret;
+
+ priv->usb2_ports++;
+ }
+
+ debug("%s: usb2 ports: %d\n", __func__, priv->usb2_ports);
+
+ return 0;
+}
+
+static int dwc3_meson_gxl_reset_init(struct dwc3_meson_gxl *priv)
+{
+ int ret;
+
+ ret = reset_get_by_index(priv->dev, 0, &priv->reset);
+ if (ret)
+ return ret;
+
+ ret = reset_assert(&priv->reset);
+ udelay(1);
+ ret |= reset_deassert(&priv->reset);
+ if (ret) {
+ reset_free(&priv->reset);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int dwc3_meson_gxl_clk_init(struct dwc3_meson_gxl *priv)
+{
+ int ret;
+
+ ret = clk_get_by_index(priv->dev, 0, &priv->clk);
+ if (ret)
+ return ret;
+
+#if CONFIG_IS_ENABLED(CLK)
+ ret = clk_enable(&priv->clk);
+ if (ret) {
+ clk_free(&priv->clk);
+ return ret;
+ }
+#endif
+
+ return 0;
+}
+
+static int dwc3_meson_gxl_probe(struct udevice *dev)
+{
+ struct dwc3_meson_gxl *priv = dev_get_platdata(dev);
+ int ret, i;
+
+ priv->dev = dev;
+
+ ret = regmap_init_mem(dev_ofnode(dev), &priv->regmap);
+ if (ret)
+ return ret;
+
+ ret = dwc3_meson_gxl_clk_init(priv);
+ if (ret)
+ return ret;
+
+ ret = dwc3_meson_gxl_reset_init(priv);
+ if (ret)
+ return ret;
+
+ ret = dwc3_meson_gxl_get_phys(priv);
+ if (ret)
+ return ret;
+
+#if CONFIG_IS_ENABLED(DM_REGULATOR)
+ ret = device_get_supply_regulator(dev, "vbus-supply",
+ &priv->vbus_supply);
+ if (ret && ret != -ENOENT) {
+ pr_err("Failed to get PHY regulator\n");
+ return ret;
+ }
+
+ if (priv->vbus_supply) {
+ ret = regulator_set_enable(priv->vbus_supply, true);
+ if (ret)
+ return ret;
+ }
+#endif
+
+ /* On GXL PHY must be started in device mode for DWC2 init */
+ priv->otg_mode = USB_DR_MODE_PERIPHERAL;
+
+ ret = dwc3_meson_gxl_usb_init(priv);
+ if (ret)
+ return ret;
+
+ priv->otg_mode = usb_get_dr_mode(dev->node);
+
+ if (priv->otg_mode == USB_DR_MODE_PERIPHERAL)
+ priv->otg_phy_mode = USB_DR_MODE_PERIPHERAL;
+ else
+ priv->otg_phy_mode = USB_DR_MODE_HOST;
+
+ for (i = 0 ; i < PHY_COUNT ; ++i) {
+ if (!priv->phys[i].dev)
+ continue;
+
+ ret = generic_phy_init(&priv->phys[i]);
+ if (ret)
+ goto err_phy_init;
+ }
+
+ for (i = 0; i < PHY_COUNT; ++i) {
+ if (!priv->phys[i].dev)
+ continue;
+
+ ret = generic_phy_power_on(&priv->phys[i]);
+ if (ret)
+ goto err_phy_init;
+ }
+
+ if (priv->phys[USB2_OTG_PHY].dev)
+ phy_meson_gxl_usb2_set_mode(&priv->phys[USB2_OTG_PHY],
+ priv->otg_phy_mode);
+
+ dwc3_meson_gxl_usb2_set_mode(priv, priv->otg_phy_mode);
+
+ return 0;
+
+err_phy_init:
+ for (i = 0 ; i < PHY_COUNT ; ++i) {
+ if (!priv->phys[i].dev)
+ continue;
+
+ generic_phy_exit(&priv->phys[i]);
+ }
+
+ return ret;
+}
+
+static int dwc3_meson_gxl_remove(struct udevice *dev)
+{
+ struct dwc3_meson_gxl *priv = dev_get_platdata(dev);
+ int i;
+
+ reset_release_all(&priv->reset, 1);
+
+ clk_release_all(&priv->clk, 1);
+
+ for (i = 0; i < PHY_COUNT; ++i) {
+ if (!priv->phys[i].dev)
+ continue;
+
+ generic_phy_power_off(&priv->phys[i]);
+ }
+
+ for (i = 0 ; i < PHY_COUNT ; ++i) {
+ if (!priv->phys[i].dev)
+ continue;
+
+ generic_phy_exit(&priv->phys[i]);
+ }
+
+ return dm_scan_fdt_dev(dev);
+}
+
+static const struct udevice_id dwc3_meson_gxl_ids[] = {
+ { .compatible = "amlogic,meson-gxl-usb-ctrl" },
+ { .compatible = "amlogic,meson-gxm-usb-ctrl" },
+ { }
+};
+
+U_BOOT_DRIVER(dwc3_generic_wrapper) = {
+ .name = "dwc3-meson-gxl",
+ .id = UCLASS_SIMPLE_BUS,
+ .of_match = dwc3_meson_gxl_ids,
+ .probe = dwc3_meson_gxl_probe,
+ .remove = dwc3_meson_gxl_remove,
+ .platdata_auto_alloc_size = sizeof(struct dwc3_meson_gxl),
+
+};
--
2.22.0
