Signed-off-by: Jean-Jacques Hiblot <jjhib...@ti.com>
---
drivers/phy/Kconfig | 10 ++++
drivers/phy/Makefile | 1 +
drivers/phy/keystone-usb-phy.c | 109 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 120 insertions(+)
create mode 100644 drivers/phy/keystone-usb-phy.c
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 3921e39..825ee7c 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -164,4 +164,14 @@ config OMAP_USB2_PHY
This PHY is found on OMAP devices supporting USB2.
+
+config KEYSTONE_USB_PHY
+ bool "Support TI Keystone USB PHY"
+ depends on PHY
+ depends on ARCH_KEYSTONE
+ help
+ Support for the USB PHY found on some Keystone (k2) processors
+
+ This PHY is found on some Keystone (K2) devices supporting USB.
+
endmenu
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 53dd5bd..099551d 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -18,3 +18,4 @@ obj-$(CONFIG_PHY_STM32_USBPHYC) += phy-stm32-usbphyc.o
obj-$(CONFIG_MESON_GXL_USB_PHY) += meson-gxl-usb2.o meson-gxl-usb3.o
obj-$(CONFIG_MSM8916_USB_PHY) += msm8916-usbh-phy.o
obj-$(CONFIG_OMAP_USB2_PHY) += omap-usb2-phy.o
+obj-$(CONFIG_KEYSTONE_USB_PHY) += keystone-usb-phy.o
diff --git a/drivers/phy/keystone-usb-phy.c b/drivers/phy/keystone-usb-phy.c
new file mode 100644
index 0000000..e8146ca
--- /dev/null
+++ b/drivers/phy/keystone-usb-phy.c
@@ -0,0 +1,109 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com/
+ * Written by Jean-Jacques Hiblot <jjhib...@ti.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/device.h>
+#include <generic-phy.h>
+#include <asm/io.h>
+
+/* USB PHY control register offsets */
+#define USB_PHY_CTL_UTMI 0x0000
+#define USB_PHY_CTL_PIPE 0x0004
+#define USB_PHY_CTL_PARAM_1 0x0008
+#define USB_PHY_CTL_PARAM_2 0x000c
+#define USB_PHY_CTL_CLOCK 0x0010
+#define USB_PHY_CTL_PLL 0x0014
+
+#define PHY_OTG_VBUSVLDECTSEL BIT(16)
+#define PHY_REF_SSP_EN BIT(29)
+
+struct keystone_usb_phy {
+ void __iomem *reg;
+};
+
+static int keystone_usb_init(struct phy *phy)
+{
+ u32 val;
+ struct udevice *dev = phy->dev;
+ struct keystone_usb_phy *keystone = dev_get_priv(dev);
+
+ /*
+ * VBUSVLDEXTSEL has a default value of 1 in BootCfg but shouldn't.
+ * It should always be cleared because our USB PHY has an onchip VBUS
+ * analog comparator.
+ */
+ val = readl(keystone->reg + USB_PHY_CTL_CLOCK);
+ /* quit selecting the vbusvldextsel by default! */
+ val &= ~PHY_OTG_VBUSVLDECTSEL;
+ writel(val, keystone->reg + USB_PHY_CTL_CLOCK);
+
+ return 0;
+}
+
+static int keystone_usb_power_on(struct phy *phy)
+{
+ u32 val;
+ struct udevice *dev = phy->dev;
+ struct keystone_usb_phy *keystone = dev_get_priv(dev);
+
+ val = readl(keystone->reg + USB_PHY_CTL_CLOCK);
+ val |= PHY_REF_SSP_EN;
+ writel(val, keystone->reg + USB_PHY_CTL_CLOCK);
+
+ return 0;
+}
+
+static int keystone_usb_power_off(struct phy *phy)
+{
+ u32 val;
+ struct udevice *dev = phy->dev;
+ struct keystone_usb_phy *keystone = dev_get_priv(dev);
+
+ val = readl(keystone->reg + USB_PHY_CTL_CLOCK);
+ val &= ~PHY_REF_SSP_EN;
+ writel(val, keystone->reg + USB_PHY_CTL_CLOCK);
+
+ return 0;
+}
+
+static int keystone_usb_exit(struct phy *phy)
+{
+ return 0;
+}
+
+static int keystone_usb_phy_probe(struct udevice *dev)
+{
+ struct keystone_usb_phy *keystone = dev_get_priv(dev);
+
+ keystone->reg = dev_remap_addr_index(dev, 0);
+ if (!keystone->reg) {
+ pr_err("unable to remap usb phy\n");
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static const struct udevice_id keystone_usb_phy_ids[] = {
+ { .compatible = "ti,keystone-usbphy" },
+ { }
+};
+
+static struct phy_ops keystone_usb_phy_ops = {
+ .init = keystone_usb_init,
+ .power_on = keystone_usb_power_on,
+ .power_off = keystone_usb_power_off,
+ .exit = keystone_usb_exit,
+};
+
+U_BOOT_DRIVER(keystone_usb_phy) = {
+ .name = "keystone_usb_phy",
+ .id = UCLASS_PHY,
+ .of_match = keystone_usb_phy_ids,
+ .ops = &keystone_usb_phy_ops,
+ .probe = keystone_usb_phy_probe,
+ .priv_auto_alloc_size = sizeof(struct keystone_usb_phy),
+};
--
2.7.4
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