For the Armada 38x SoCs which come with an xhci controller, specific initialization must be done during probe related to the MBus windows configuration. This patch adds the support of this quirk. Signed-off-by: Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx> --- drivers/usb/host/Kconfig | 7 +++++ drivers/usb/host/Makefile | 1 + drivers/usb/host/xhci-mvebu.c | 71 +++++++++++++++++++++++++++++++++++++++++++ drivers/usb/host/xhci-mvebu.h | 21 +++++++++++++ drivers/usb/host/xhci-plat.c | 6 ++++ 5 files changed, 106 insertions(+) create mode 100644 drivers/usb/host/xhci-mvebu.c create mode 100644 drivers/usb/host/xhci-mvebu.h diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig index 3d9e54062d62..e70943fac4a1 100644 --- a/drivers/usb/host/Kconfig +++ b/drivers/usb/host/Kconfig @@ -29,6 +29,13 @@ if USB_XHCI_HCD config USB_XHCI_PLATFORM tristate +config USB_XHCI_MVEBU + tristate "xHCI support for Marvell Armada 38x" + select USB_XHCI_PLATFORM + ---help--- + Say 'Y' to enable the support for the xHCI host controller + found in Marvell Armada 38x ARM SOCs. + endif # USB_XHCI_HCD config USB_EHCI_HCD diff --git a/drivers/usb/host/Makefile b/drivers/usb/host/Makefile index 7530468c9a4f..7a8db7f7dc01 100644 --- a/drivers/usb/host/Makefile +++ b/drivers/usb/host/Makefile @@ -19,6 +19,7 @@ xhci-hcd-$(CONFIG_PCI) += xhci-pci.o ifneq ($(CONFIG_USB_XHCI_PLATFORM), ) xhci-hcd-y += xhci-plat.o + xhci-hcd-$(CONFIG_USB_XHCI_MVEBU) += xhci-mvebu.o endif obj-$(CONFIG_USB_WHCI_HCD) += whci/ diff --git a/drivers/usb/host/xhci-mvebu.c b/drivers/usb/host/xhci-mvebu.c new file mode 100644 index 000000000000..bcfa61a13f5d --- /dev/null +++ b/drivers/usb/host/xhci-mvebu.c @@ -0,0 +1,71 @@ +/* + * Copyright (C) 2014 Marvell + * Author: Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundation. + */ + +#include <linux/io.h> +#include <linux/mbus.h> +#include <linux/of.h> +#include <linux/platform_device.h> + +#define USB3_MAX_WINDOWS 4 +#define USB3_WIN_CTRL(w) (0x0 + ((w) * 8)) +#define USB3_WIN_BASE(w) (0x4 + ((w) * 8)) + +static void __init xhci_mvebu_mbus_config(void __iomem *base, + const struct mbus_dram_target_info *dram) +{ + int win; + + /* Clear all existing windows */ + for (win = 0; win < USB3_MAX_WINDOWS; win++) { + writel(0, base + USB3_WIN_CTRL(win)); + writel(0, base + USB3_WIN_BASE(win)); + } + + /* Program each DRAM CS in a seperate window */ + for (win = 0; win < dram->num_cs; win++) { + const struct mbus_dram_window *cs = dram->cs + win; + + writel(((cs->size - 1) & 0xffff0000) | (cs->mbus_attr << 8) | + (dram->mbus_dram_target_id << 4) | 1, + base + USB3_WIN_CTRL(win)); + + writel((cs->base & 0xffff0000), base + USB3_WIN_BASE(win)); + } +} + +int xhci_mvebu_mbus_init_quirk(struct platform_device *pdev) +{ + struct resource *res; + void __iomem *base; + const struct mbus_dram_target_info *dram; + int ret = 0; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (!res) + return -ENODEV; + + /* + * We don't use devm_ioremap() because this mapping should + * only exists for the duration of this probe function. + */ + base = ioremap(res->start, resource_size(res)); + if (!base) + return -ENODEV; + + dram = mv_mbus_dram_info(); + xhci_mvebu_mbus_config(base, dram); + + /* + * This memory area was only needed to configure the MBus + * windows, and is therefore no longer useful. + */ + iounmap(base); + + return ret; +} diff --git a/drivers/usb/host/xhci-mvebu.h b/drivers/usb/host/xhci-mvebu.h new file mode 100644 index 000000000000..61d09b6e8443 --- /dev/null +++ b/drivers/usb/host/xhci-mvebu.h @@ -0,0 +1,21 @@ +/* + * Copyright (C) 2014 Marvell + * + * Gregory Clement <gregory.clement@xxxxxxxxxxxxxxxxxx> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#ifndef __LINUX_XHCI_MVEBU_H +#define __LINUX_XHCI_MVEBU_H +#if IS_ENABLED(CONFIG_USB_XHCI_MVEBU) +int xhci_mvebu_mbus_init_quirk(struct platform_device *pdev); +#else +static inline int xhci_mvebu_mbus_init_quirk(struct device dev) +{ + return 0; +} +#endif +#endif /* __LINUX_XHCI_MVEBU_H */ diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index bb37b941c8ec..d12ba56f52da 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -19,6 +19,7 @@ #include <linux/slab.h> #include "xhci.h" +#include "xhci-mvebu.h" struct xhci_plat_priv { struct clk *clk; @@ -147,6 +148,10 @@ static int xhci_plat_probe(struct platform_device *pdev) if (!res) return -ENODEV; + if (of_device_is_compatible(pdev->dev.of_node, + "marvell,armada-380-xhci")) + xhci_mvebu_mbus_init_quirk(pdev); + /* Initialize dma_mask and coherent_dma_mask to 32-bits */ ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); if (ret) @@ -282,6 +287,7 @@ static const struct dev_pm_ops xhci_plat_pm_ops = { static const struct of_device_id usb_xhci_of_match[] = { { .compatible = "generic-xhci" }, { .compatible = "xhci-platform" }, + { .compatible = "marvell,armada-380-xhci"}, { }, }; MODULE_DEVICE_TABLE(of, usb_xhci_of_match); -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html