[U-Boot] [PATCH 05/15] usb: xhci: Add Marvell MVEBU xHCI support

[Stefan Roese]

This patch adds DM based support for the xHCI USB 3.0 controller
integrated in the Armada 3700 SoC. It may be extended to be used
by other MVEBU SoCs as well.

Signed-off-by: Stefan Roese <sr at denx.de>
Cc: Nadav Haklai <nadavh at marvell.com>
Cc: Kostya Porotchkin <kostap at marvell.com>
Cc: Wilson Ding <dingwei at marvell.com>
Cc: Victor Gu <xigu at marvell.com>
Cc: Hua Jing <jinghua at marvell.com>
Cc: Terry Zhou <bjzhou at marvell.com>
Cc: Hanna Hawa <hannah at marvell.com>
Cc: Haim Boot <hayim at marvell.com>
Cc: Marek Vasut <marex at denx.de>
---
 drivers/usb/host/Kconfig      |  9 ++++
 drivers/usb/host/Makefile     |  1 +
 drivers/usb/host/xhci-mvebu.c | 96 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 106 insertions(+)
 create mode 100644 drivers/usb/host/xhci-mvebu.c

diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index e0699d4..f996c75 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -28,6 +28,15 @@ config USB_XHCI_DWC3
 	  Say Y or if your system has a Dual Role SuperSpeed
 	  USB controller based on the DesignWare USB3 IP Core.
 
+config USB_XHCI_MVEBU
+	bool "MVEBU USB 3.0 support"
+	default y
+	depends on ARCH_MVEBU
+	help
+	  Choose this option to add support for USB 3.0 driver on mvebu
+	  SoCs, which includes Armada8K, Armada3700 and other Armada
+	  family SoCs.
+
 endif # USB_XHCI_HCD
 
 config USB_EHCI_HCD
diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile
index 620d114..519325d 100644
--- a/drivers/usb/host/Makefile
+++ b/drivers/usb/host/Makefile
@@ -60,6 +60,7 @@ obj-$(CONFIG_USB_XHCI_ZYNQMP) += xhci-zynqmp.o
 obj-$(CONFIG_USB_XHCI_KEYSTONE) += xhci-keystone.o
 obj-$(CONFIG_USB_XHCI_EXYNOS) += xhci-exynos5.o
 obj-$(CONFIG_USB_XHCI_FSL) += xhci-fsl.o
+obj-$(CONFIG_USB_XHCI_MVEBU) += xhci-mvebu.o
 obj-$(CONFIG_USB_XHCI_OMAP) += xhci-omap.o
 obj-$(CONFIG_USB_XHCI_PCI) += xhci-pci.o
 obj-$(CONFIG_USB_XHCI_UNIPHIER) += xhci-uniphier.o
diff --git a/drivers/usb/host/xhci-mvebu.c b/drivers/usb/host/xhci-mvebu.c
new file mode 100644
index 0000000..e09e87a
--- /dev/null
+++ b/drivers/usb/host/xhci-mvebu.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2015 Marvell International Ltd.
+ *
+ * MVEBU USB HOST xHCI Controller
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <usb.h>
+#include <asm/gpio.h>
+
+#include "xhci.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct mvebu_xhci_platdata {
+	fdt_addr_t hcd_base;
+};
+
+/**
+ * Contains pointers to register base addresses
+ * for the usb controller.
+ */
+struct mvebu_xhci {
+	struct xhci_ctrl ctrl;	/* Needs to come first in this struct! */
+	struct usb_platdata usb_plat;
+	struct xhci_hccr *hcd;
+};
+
+/*
+ * Dummy implementation that can be overwritten by a board
+ * specific function
+ */
+__weak int board_xhci_enable(void)
+{
+	return 0;
+}
+
+static int xhci_usb_probe(struct udevice *dev)
+{
+	struct mvebu_xhci_platdata *plat = dev_get_platdata(dev);
+	struct mvebu_xhci *ctx = dev_get_priv(dev);
+	struct xhci_hcor *hcor;
+	int len;
+
+	ctx->hcd = (struct xhci_hccr *)plat->hcd_base;
+	len = HC_LENGTH(xhci_readl(&ctx->hcd->cr_capbase));
+	hcor = (struct xhci_hcor *)((uintptr_t)ctx->hcd + len);
+
+	/* Enable USB xHCI (VBUS, reset etc) in board specific code */
+	board_xhci_enable();
+
+	return xhci_register(dev, ctx->hcd, hcor);
+}
+
+static int xhci_usb_remove(struct udevice *dev)
+{
+	return xhci_deregister(dev);
+}
+
+static int xhci_usb_ofdata_to_platdata(struct udevice *dev)
+{
+	struct mvebu_xhci_platdata *plat = dev_get_platdata(dev);
+
+	/*
+	 * Get the base address for XHCI controller from the device node
+	 */
+	plat->hcd_base = dev_get_addr(dev);
+	if (plat->hcd_base == FDT_ADDR_T_NONE) {
+		debug("Can't get the XHCI register base address\n");
+		return -ENXIO;
+	}
+
+	return 0;
+}
+
+static const struct udevice_id xhci_usb_ids[] = {
+	{ .compatible = "marvell,armada3700-xhci" },
+	{ }
+};
+
+U_BOOT_DRIVER(usb_xhci) = {
+	.name	= "xhci_mvebu",
+	.id	= UCLASS_USB,
+	.of_match = xhci_usb_ids,
+	.ofdata_to_platdata = xhci_usb_ofdata_to_platdata,
+	.probe = xhci_usb_probe,
+	.remove = xhci_usb_remove,
+	.ops	= &xhci_usb_ops,
+	.platdata_auto_alloc_size = sizeof(struct mvebu_xhci_platdata),
+	.priv_auto_alloc_size = sizeof(struct mvebu_xhci),
+	.flags	= DM_FLAG_ALLOC_PRIV_DMA,
+};
-- 
2.9.3