From b7ca56dcda8a2be0e7ca6142448ab4153926aafc Mon Sep 17 00:00:00 2001 From: Patrice Chotard Date: Tue, 5 Sep 2017 11:04:21 +0200 Subject: usb: phy: Add STi USB2 PHY This is the generic phy driver for the picoPHY ports used by USB2/1.1 controllers. It is found on STiH407 SoC family from STMicroelectronics. Signed-off-by: Patrice Chotard Reviewed-by: Simon Glass --- drivers/phy/Kconfig | 8 ++ drivers/phy/Makefile | 1 + drivers/phy/sti_usb_phy.c | 181 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 190 insertions(+) create mode 100644 drivers/phy/sti_usb_phy.c (limited to 'drivers/phy') diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig index 98f2a1b0471..3b9a09ce181 100644 --- a/drivers/phy/Kconfig +++ b/drivers/phy/Kconfig @@ -77,4 +77,12 @@ config SPL_PIPE3_PHY This PHY is found on omap devices supporting SATA such as dra7, am57x and omap5 +config STI_USB_PHY + bool "STMicroelectronics USB2 picoPHY driver for STiH407 family" + depends on PHY && ARCH_STI + help + This is the generic phy driver for the picoPHY ports + used by USB2 and USB3 Host controllers available on + STiH407 SoC families. + endmenu diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile index ab56c46bb45..668040b0bb7 100644 --- a/drivers/phy/Makefile +++ b/drivers/phy/Makefile @@ -9,3 +9,4 @@ obj-$(CONFIG_$(SPL_)PHY) += phy-uclass.o obj-$(CONFIG_$(SPL_)NOP_PHY) += nop-phy.o obj-$(CONFIG_PHY_SANDBOX) += sandbox-phy.o obj-$(CONFIG_$(SPL_)PIPE3_PHY) += ti-pipe3-phy.o +obj-$(CONFIG_STI_USB_PHY) += sti_usb_phy.o diff --git a/drivers/phy/sti_usb_phy.c b/drivers/phy/sti_usb_phy.c new file mode 100644 index 00000000000..0e0b1c02d2e --- /dev/null +++ b/drivers/phy/sti_usb_phy.c @@ -0,0 +1,181 @@ +/* + * Copyright (c) 2017 + * Patrice Chotard + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +DECLARE_GLOBAL_DATA_PTR; + +/* Default PHY_SEL and REFCLKSEL configuration */ +#define STIH407_USB_PICOPHY_CTRL_PORT_CONF 0x6 + +/* ports parameters overriding */ +#define STIH407_USB_PICOPHY_PARAM_DEF 0x39a4dc + +#define PHYPARAM_REG 1 +#define PHYCTRL_REG 2 +#define PHYPARAM_NB 3 + +struct sti_usb_phy { + struct regmap *regmap; + struct reset_ctl global_ctl; + struct reset_ctl port_ctl; + int param; + int ctrl; +}; + +static int sti_usb_phy_deassert(struct sti_usb_phy *phy) +{ + int ret; + + ret = reset_deassert(&phy->global_ctl); + if (ret < 0) { + error("PHY global deassert failed: %d", ret); + return ret; + } + + ret = reset_deassert(&phy->port_ctl); + if (ret < 0) + error("PHY port deassert failed: %d", ret); + + return ret; +} + +static int sti_usb_phy_init(struct phy *usb_phy) +{ + struct udevice *dev = usb_phy->dev; + struct sti_usb_phy *phy = dev_get_priv(dev); + void __iomem *reg; + + /* set ctrl picophy value */ + reg = (void __iomem *)phy->regmap->base + phy->ctrl; + /* CTRL_PORT mask is 0x1f */ + clrsetbits_le32(reg, 0x1f, STIH407_USB_PICOPHY_CTRL_PORT_CONF); + + /* set ports parameters overriding */ + reg = (void __iomem *)phy->regmap->base + phy->param; + /* PARAM_DEF mask is 0xffffffff */ + clrsetbits_le32(reg, 0xffffffff, STIH407_USB_PICOPHY_PARAM_DEF); + + return sti_usb_phy_deassert(phy); +} + +static int sti_usb_phy_exit(struct phy *usb_phy) +{ + struct udevice *dev = usb_phy->dev; + struct sti_usb_phy *phy = dev_get_priv(dev); + int ret; + + ret = reset_assert(&phy->port_ctl); + if (ret < 0) { + error("PHY port assert failed: %d", ret); + return ret; + } + + ret = reset_assert(&phy->global_ctl); + if (ret < 0) + error("PHY global assert failed: %d", ret); + + return ret; +} + +struct phy_ops sti_usb_phy_ops = { + .init = sti_usb_phy_init, + .exit = sti_usb_phy_exit, +}; + +int sti_usb_phy_probe(struct udevice *dev) +{ + struct sti_usb_phy *priv = dev_get_priv(dev); + struct udevice *syscon; + struct ofnode_phandle_args syscfg_phandle; + u32 cells[PHYPARAM_NB]; + int ret, count; + + /* get corresponding syscon phandle */ + ret = dev_read_phandle_with_args(dev, "st,syscfg", NULL, 0, 0, + &syscfg_phandle); + + if (ret < 0) { + error("Can't get syscfg phandle: %d\n", ret); + return ret; + } + + ret = uclass_get_device_by_ofnode(UCLASS_SYSCON, syscfg_phandle.node, + &syscon); + if (ret) { + error("unable to find syscon device (%d)\n", ret); + return ret; + } + + priv->regmap = syscon_get_regmap(syscon); + if (!priv->regmap) { + error("unable to find regmap\n"); + return -ENODEV; + } + + /* get phy param offset */ + count = fdtdec_get_int_array_count(gd->fdt_blob, dev_of_offset(dev), + "st,syscfg", cells, + ARRAY_SIZE(cells)); + + if (count < 0) { + error("Bad PHY st,syscfg property %d\n", count); + return -EINVAL; + } + + if (count > PHYPARAM_NB) { + error("Unsupported PHY param count %d\n", count); + return -EINVAL; + } + + priv->param = cells[PHYPARAM_REG]; + priv->ctrl = cells[PHYCTRL_REG]; + + /* get global reset control */ + ret = reset_get_by_name(dev, "global", &priv->global_ctl); + if (ret) { + error("can't get global reset for %s (%d)", dev->name, ret); + return ret; + } + + /* get port reset control */ + ret = reset_get_by_name(dev, "port", &priv->port_ctl); + if (ret) { + error("can't get port reset for %s (%d)", dev->name, ret); + return ret; + } + + return 0; +} + +static const struct udevice_id sti_usb_phy_ids[] = { + { .compatible = "st,stih407-usb2-phy" }, + { } +}; + +U_BOOT_DRIVER(sti_usb_phy) = { + .name = "sti_usb_phy", + .id = UCLASS_PHY, + .of_match = sti_usb_phy_ids, + .probe = sti_usb_phy_probe, + .ops = &sti_usb_phy_ops, + .priv_auto_alloc_size = sizeof(struct sti_usb_phy), +}; -- cgit v1.2.3