[PATCH v3 6/8] phy: add driver for Qualcomm IPQ40xx USB PHY

[Robert Marko]

Add a driver to setup the USB PHY-s on Qualcomm IPQ40xx series SoCs.
The driver sets up HS and SS phys.

Signed-off-by: Robert Marko <robert.marko at sartura.hr>
Cc: Luka Perkov <luka.perkov at sartura.hr>
---
 MAINTAINERS                        |   1 +
 drivers/phy/Kconfig                |   6 ++
 drivers/phy/Makefile               |   1 +
 drivers/phy/phy-qcom-ipq4019-usb.c | 145 +++++++++++++++++++++++++++++
 4 files changed, 153 insertions(+)
 create mode 100644 drivers/phy/phy-qcom-ipq4019-usb.c

diff --git a/MAINTAINERS b/MAINTAINERS
index 1f00d5fced..c0e9285124 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -240,6 +240,7 @@ F:	arch/arm/mach-ipq40xx/
 F:	include/dt-bindings/clock/qcom,ipq4019-gcc.h
 F:	include/dt-bindings/reset/qcom,ipq4019-reset.h
 F:	drivers/reset/reset-ipq4019.c
+F:	drivers/phy/phy-qcom-ipq4019-usb.c
 
 ARM MARVELL KIRKWOOD ARMADA-XP ARMADA-38X ARMADA-37XX ARMADA-7K/8K
 M:	Stefan Roese <sr at denx.de>
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 9c775107e9..8da00a259d 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -125,6 +125,12 @@ config STI_USB_PHY
 	  used by USB2 and USB3 Host controllers available on
 	  STiH407 SoC families.
 
+config PHY_QCOM_IPQ4019_USB
+	tristate "Qualcomm IPQ4019 USB PHY driver"
+	depends on PHY && ARCH_IPQ40XX
+	help
+	  Support for the USB PHY-s on Qualcomm IPQ40xx SoC-s.
+
 config PHY_RCAR_GEN2
 	tristate "Renesas R-Car Gen2 USB PHY"
 	depends on PHY && RCAR_GEN2
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 74e8d931d3..009f353baf 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -13,6 +13,7 @@ obj-$(CONFIG_PHY_SANDBOX) += sandbox-phy.o
 obj-$(CONFIG_$(SPL_)PIPE3_PHY) += ti-pipe3-phy.o
 obj-$(CONFIG_AM654_PHY) += phy-ti-am654.o
 obj-$(CONFIG_STI_USB_PHY) += sti_usb_phy.o
+obj-$(CONFIG_PHY_QCOM_IPQ4019_USB) += phy-qcom-ipq4019-usb.o
 obj-$(CONFIG_PHY_RCAR_GEN2) += phy-rcar-gen2.o
 obj-$(CONFIG_PHY_RCAR_GEN3) += phy-rcar-gen3.o
 obj-$(CONFIG_PHY_STM32_USBPHYC) += phy-stm32-usbphyc.o
diff --git a/drivers/phy/phy-qcom-ipq4019-usb.c b/drivers/phy/phy-qcom-ipq4019-usb.c
new file mode 100644
index 0000000000..465f0d3a01
--- /dev/null
+++ b/drivers/phy/phy-qcom-ipq4019-usb.c
@@ -0,0 +1,145 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019 Sartura Ltd.
+ *
+ * Author: Robert Marko <robert.marko at sartura.hr>
+ *
+ * Based on Linux driver
+ */
+
+#include <clk.h>
+#include <common.h>
+#include <dm.h>
+#include <generic-phy.h>
+#include <log.h>
+#include <reset.h>
+#include <asm/io.h>
+#include <linux/delay.h>
+
+struct ipq4019_usb_phy {
+	phys_addr_t			base;
+	struct reset_ctl	por_rst;
+	struct reset_ctl	srif_rst;
+};
+
+static int ipq4019_ss_phy_power_off(struct phy *_phy)
+{
+	struct ipq4019_usb_phy *phy = dev_get_priv(_phy->dev);
+
+	reset_assert(&phy->por_rst);
+	mdelay(10);
+
+	return 0;
+}
+
+static int ipq4019_ss_phy_power_on(struct phy *_phy)
+{
+	struct ipq4019_usb_phy *phy = dev_get_priv(_phy->dev);
+
+	ipq4019_ss_phy_power_off(_phy);
+
+	reset_deassert(&phy->por_rst);
+
+	return 0;
+}
+
+static struct phy_ops ipq4019_usb_ss_phy_ops = {
+	.power_on = ipq4019_ss_phy_power_on,
+	.power_off = ipq4019_ss_phy_power_off,
+};
+
+static int ipq4019_usb_ss_phy_probe(struct udevice *dev)
+{
+	struct ipq4019_usb_phy *phy = dev_get_priv(dev);
+	int ret;
+
+	phy->base = dev_read_addr(dev);
+	if (phy->base == FDT_ADDR_T_NONE)
+		return -EINVAL;
+
+	ret = reset_get_by_name(dev, "por_rst", &phy->por_rst);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static const struct udevice_id ipq4019_usb_ss_phy_ids[] = {
+	{ .compatible = "qcom,usb-ss-ipq4019-phy" },
+	{ }
+};
+
+U_BOOT_DRIVER(ipq4019_usb_ss_phy) = {
+	.name		= "ipq4019-usb-ss-phy",
+	.id		= UCLASS_PHY,
+	.of_match	= ipq4019_usb_ss_phy_ids,
+	.ops		= &ipq4019_usb_ss_phy_ops,
+	.probe		= ipq4019_usb_ss_phy_probe,
+	.priv_auto_alloc_size = sizeof(struct ipq4019_usb_phy),
+};
+
+static int ipq4019_hs_phy_power_off(struct phy *_phy)
+{
+	struct ipq4019_usb_phy *phy = dev_get_priv(_phy->dev);
+
+	reset_assert(&phy->por_rst);
+	mdelay(10);
+
+	reset_assert(&phy->srif_rst);
+	mdelay(10);
+
+	return 0;
+}
+
+static int ipq4019_hs_phy_power_on(struct phy *_phy)
+{
+	struct ipq4019_usb_phy *phy = dev_get_priv(_phy->dev);
+
+	ipq4019_hs_phy_power_off(_phy);
+
+	reset_deassert(&phy->srif_rst);
+	mdelay(10);
+
+	reset_deassert(&phy->por_rst);
+
+	return 0;
+}
+
+static struct phy_ops ipq4019_usb_hs_phy_ops = {
+	.power_on = ipq4019_hs_phy_power_on,
+	.power_off = ipq4019_hs_phy_power_off,
+};
+
+static int ipq4019_usb_hs_phy_probe(struct udevice *dev)
+{
+	struct ipq4019_usb_phy *phy = dev_get_priv(dev);
+	int ret;
+
+	phy->base = dev_read_addr(dev);
+	if (phy->base == FDT_ADDR_T_NONE)
+		return -EINVAL;
+
+	ret = reset_get_by_name(dev, "por_rst", &phy->por_rst);
+	if (ret)
+		return ret;
+
+	ret = reset_get_by_name(dev, "srif_rst", &phy->srif_rst);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static const struct udevice_id ipq4019_usb_hs_phy_ids[] = {
+	{ .compatible = "qcom,usb-hs-ipq4019-phy" },
+	{ }
+};
+
+U_BOOT_DRIVER(ipq4019_usb_hs_phy) = {
+	.name		= "ipq4019-usb-hs-phy",
+	.id		= UCLASS_PHY,
+	.of_match	= ipq4019_usb_hs_phy_ids,
+	.ops		= &ipq4019_usb_hs_phy_ops,
+	.probe		= ipq4019_usb_hs_phy_probe,
+	.priv_auto_alloc_size = sizeof(struct ipq4019_usb_phy),
+};
-- 
2.26.2