From: Patrice Chotard <patrice.chot...@st.com>
This is the generic phy driver for the picoPHY ports
used by USB2 and USB3 Host controllers available on
STiH407 SoC families.
Signed-off-by: Patrice Chotard <patrice.chot...@st.com>
---
v2: replace bitfield_replace() by clrsetbits_le32()
configs/stih410-b2260_defconfig | 1 +
drivers/usb/Kconfig | 4 ++
drivers/usb/phy/Kconfig | 11 +++
drivers/usb/phy/Makefile | 1 +
drivers/usb/phy/sti_phy_usb.c | 153 ++++++++++++++++++++++++++++++++++++++++
5 files changed, 170 insertions(+)
create mode 100644 drivers/usb/phy/Kconfig
create mode 100644 drivers/usb/phy/sti_phy_usb.c
diff --git a/configs/stih410-b2260_defconfig b/configs/stih410-b2260_defconfig
index 4e6942f..d3cfdca 100644
--- a/configs/stih410-b2260_defconfig
+++ b/configs/stih410-b2260_defconfig
@@ -17,6 +17,7 @@ CONFIG_CMD_FS_GENERIC=y
CONFIG_OF_CONTROL=y
CONFIG_REGMAP=y
CONFIG_SYSCON=y
+CONFIG_MISC=y
CONFIG_MMC_SDHCI=y
CONFIG_MMC_SDHCI_STI=y
CONFIG_PINCTRL=y
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index da3ec2f..e30c9d6 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -94,4 +94,8 @@ endif
source "drivers/usb/gadget/Kconfig"
+comment "USB PHY"
+
+source "drivers/usb/phy/Kconfig"
+
endif
diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
new file mode 100644
index 0000000..1a86c6e
--- /dev/null
+++ b/drivers/usb/phy/Kconfig
@@ -0,0 +1,11 @@
+menu "USB PHY drivers"
+
+config STI_PHY_USB
+ bool "STMicroelectronics USB2 picoPHY driver for STiH407 family"
+ default n
+ 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/usb/phy/Makefile b/drivers/usb/phy/Makefile
index 4e548c2..b50fb5a 100644
--- a/drivers/usb/phy/Makefile
+++ b/drivers/usb/phy/Makefile
@@ -8,3 +8,4 @@
obj-$(CONFIG_TWL4030_USB) += twl4030.o
obj-$(CONFIG_OMAP_USB_PHY) += omap_usb_phy.o
obj-$(CONFIG_ROCKCHIP_USB2_PHY) += rockchip_usb2_phy.o
+obj-$(CONFIG_STI_PHY_USB) += sti_phy_usb.o
diff --git a/drivers/usb/phy/sti_phy_usb.c b/drivers/usb/phy/sti_phy_usb.c
new file mode 100644
index 0000000..59b0b47
--- /dev/null
+++ b/drivers/usb/phy/sti_phy_usb.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 2017
+ * Patrice Chotard <patrice.chot...@st.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <bitfield.h>
+#include <dm.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <libfdt.h>
+#include <regmap.h>
+#include <reset-uclass.h>
+#include <syscon.h>
+#include <wait_bit.h>
+
+#include <linux/bitops.h>
+#include <linux/compat.h>
+
+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_phy_usb {
+ struct regmap *regmap;
+ struct reset_ctl global_ctl;
+ struct reset_ctl port_ctl;
+ int param;
+ int ctrl;
+};
+
+static int sti_phy_usb_deassert(struct sti_phy_usb *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 void sti_phy_usb_init(struct sti_phy_usb *phy)
+{
+ 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);
+}
+
+int sti_phy_usb_probe(struct udevice *dev)
+{
+ struct sti_phy_usb *priv = dev_get_priv(dev);
+ struct udevice *syscon;
+ struct fdtdec_phandle_args syscfg_phandle;
+ u32 cells[PHYPARAM_NB];
+ int ret, count;
+
+ /* get corresponding syscon phandle */
+ ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev->of_offset,
+ "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_of_offset(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,
+ "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;
+ }
+
+ sti_phy_usb_init(priv);
+
+ return sti_phy_usb_deassert(priv);
+}
+
+static const struct udevice_id sti_phy_usb_ids[] = {
+ { .compatible = "st,stih407-usb2-phy" },
+ { }
+};
+
+U_BOOT_DRIVER(sti_phy_usb) = {
+ .name = "sti_phy_usb",
+ .id = UCLASS_MISC,
+ .of_match = sti_phy_usb_ids,
+ .probe = sti_phy_usb_probe,
+ .priv_auto_alloc_size = sizeof(struct sti_phy_usb),
+};
--
1.9.1
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