[PATCH 1/1] zedboard: add support for usb

[Michael Graichen]

This adds minimalistic support for USB on the Zedboard/Zynq-7000

>From e1e1cdc8e2f82a5c9ecb4acc8eb67181687791d0 Mon Sep 17 00:00:00 2001
From: Michael Graichen <michael.graichen at hotmail.com>
Date: Mon, 3 May 2021 16:08:23 +0200
Subject: [PATCH] zedboard: add support for usb

Signed-off-by: Michael Graichen <michael.graichen at hotmail.com>
---
 arch/arm/boards/avnet-zedboard/lowlevel.c | 13 +++++++
 drivers/usb/host/Kconfig                  |  6 +++
 drivers/usb/host/Makefile                 |  1 +
 drivers/usb/host/ehci-zynq.c              | 47 +++++++++++++++++++++++
 drivers/usb/otg/ulpi.c                    |  1 +
 5 files changed, 68 insertions(+)
 create mode 100644 drivers/usb/host/ehci-zynq.c

diff --git a/arch/arm/boards/avnet-zedboard/lowlevel.c b/arch/arm/boards/avnet-zedboard/lowlevel.c
index f7bdceb42..e43832218 100644
--- a/arch/arm/boards/avnet-zedboard/lowlevel.c
+++ b/arch/arm/boards/avnet-zedboard/lowlevel.c
@@ -236,6 +236,19 @@ static void avnet_zedboard_ps7_init(void)
 	writel(0x00000702, ZYNQ_MIO_BASE + 0x14);
 	writel(0x00000702, ZYNQ_MIO_BASE + 0x18);
 	writel(0x00000602, ZYNQ_MIO_BASE + 0x20);
+	/* USB0 */
+	writel(0x00000304, ZYNQ_MIO_BASE + 0x70);	// MIO_PIN_28 => OTG_DATA_4
+	writel(0x00000305, ZYNQ_MIO_BASE + 0x74);	// MIO_PIN_29 => OTG_DIR
+	writel(0x00000304, ZYNQ_MIO_BASE + 0x78);	// MIO_PIN_30 => OTG_STP
+	writel(0x00000305, ZYNQ_MIO_BASE + 0x7c);	// MIO_PIN_31 => OTG_NXT
+	writel(0x00000304, ZYNQ_MIO_BASE + 0x80);	// MIO_PIN_32 => OTG_DATA_0
+	writel(0x00000304, ZYNQ_MIO_BASE + 0x84);	// MIO_PIN_33 => OTG_DATA_1
+	writel(0x00000304, ZYNQ_MIO_BASE + 0x88);	// MIO_PIN_34 => OTG_DATA_2
+	writel(0x00000304, ZYNQ_MIO_BASE + 0x8c);	// MIO_PIN_35 => OTG_DATA_3
+	writel(0x00000305, ZYNQ_MIO_BASE + 0x90);	// MIO_PIN_36 => OTG-CLK
+	writel(0x00000304, ZYNQ_MIO_BASE + 0x94);	// MIO_PIN_37 => OTG_DATA_5
+	writel(0x00000304, ZYNQ_MIO_BASE + 0x98);	// MIO_PIN_38 => OTG_DATA_6
+	writel(0x00000304, ZYNQ_MIO_BASE + 0x9c);	// MIO_PIN_39 => OTG_DATA_7
 
 	/* poor mans clkctrl */
 	writel(0x00001403, ZYNQ_CLOCK_CTRL_BASE + ZYNQ_UART_CLK_CTRL);
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 891523c4d..fcd90824c 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -13,6 +13,12 @@ config USB_EHCI_ATMEL
 	select USB_OHCI_AT91
 	bool "Atmel EHCI driver"
 
+config USB_EHCI_ZYNQ
+	bool "Support for Xilinx Zynq on-chip EHCI USB controller"
+	depends on ARCH_ZYNQ
+	help
+	  Enable support for Zynq on-chip EHCI USB controller
+
 config USB_OHCI
 	bool "OHCI driver"
 	depends on !MMU && HAS_DMA
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index e7a6cf213..eef038128 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -1,6 +1,7 @@
 obj-$(CONFIG_USB_EHCI)		+= ehci-hcd.o
 obj-$(CONFIG_USB_EHCI_OMAP)	+= ehci-omap.o
 obj-$(CONFIG_USB_EHCI_ATMEL)	+= ehci-atmel.o
+obj-$(CONFIG_USB_EHCI_ZYNQ)	+= ehci-zynq.o
 obj-$(CONFIG_USB_OHCI)		+= ohci-hcd.o
 obj-$(CONFIG_USB_OHCI_AT91)	+= ohci-at91.o
 obj-$(CONFIG_USB_XHCI)		+= xhci.o xhci-mem.o xhci-ring.o
diff --git a/drivers/usb/host/ehci-zynq.c b/drivers/usb/host/ehci-zynq.c
new file mode 100644
index 000000000..4246960e1
--- /dev/null
+++ b/drivers/usb/host/ehci-zynq.c
@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * USB Low level initialization(Specific to Zynq 7000)
+ */
+
+#include <common.h>
+#include <usb/ulpi.h>
+
+struct zynq_ehci_priv {
+	struct device_d *dev;
+	void __iomem *base;
+};
+
+static int zynq_ehci_probe(struct device_d *dev)
+{
+	struct zynq_ehci_priv *pdata;
+	struct resource *res;
+	void __iomem *base;
+
+	pdata = xzalloc(sizeof(*pdata));
+	pdata->dev = dev;
+	dev->priv = pdata;
+
+	res = dev_get_resource(dev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -EINVAL;
+
+	base = IOMEM(res->start);
+	pdata->base = base;
+
+	ulpi_setup(base + 0x170, 1);
+	add_generic_usb_ehci_device(DEVICE_ID_DYNAMIC, (unsigned int)base, NULL);
+
+	return 0;
+}
+
+static const struct of_device_id zynq_ehci_dt_ids[] = {
+	{ .compatible = "xlnx,zynq-usb-2.20a" },
+	{ /* sentinel */ }
+};
+
+static struct driver_d zynq_ehci_driver = {
+	.name = "zynq-ehci",
+	.probe = zynq_ehci_probe,
+	.of_compatible = DRV_OF_COMPAT(zynq_ehci_dt_ids),
+};
+device_platform_driver(zynq_ehci_driver);
diff --git a/drivers/usb/otg/ulpi.c b/drivers/usb/otg/ulpi.c
index 9bc432fa8..38210150e 100644
--- a/drivers/usb/otg/ulpi.c
+++ b/drivers/usb/otg/ulpi.c
@@ -144,6 +144,7 @@ struct ulpi_info {
 static struct ulpi_info ulpi_ids[] = {
 	ULPI_INFO(ULPI_ID(0x04cc, 0x1504), "NXP ISP150x"),
 	ULPI_INFO(ULPI_ID(0x0424, 0x0006), "SMSC USB331x"),
+	ULPI_INFO(ULPI_ID(0x0451, 0x1507), "TI TUSB1210"),
 };
 
 static int ulpi_read_id(void __iomem *view, int *vid, int *pid)
-- 
2.25.1