170 lines
4.1 KiB
Diff
170 lines
4.1 KiB
Diff
--- /dev/null
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+++ b/drivers/usb/host/ehci-cns21xx.c
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@@ -0,0 +1,130 @@
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+/*
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+ * Copyright (c) 2008 Cavium Networks
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+ * Copyright (c) 2010-2013 Gabor Juhos <juhosg@openwrt.org>
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+ *
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+ * This file is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License, Version 2, as
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+ * published by the Free Software Foundation.
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+ */
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+
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+#include <linux/kernel.h>
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+#include <linux/module.h>
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+#include <linux/io.h>
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+#include <linux/platform_device.h>
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+#include <linux/irq.h>
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+#include <linux/usb.h>
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+#include <linux/usb/hcd.h>
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+
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+#include <mach/cns21xx.h>
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+
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+#include "ehci.h"
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+
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+#define DRIVER_NAME "cns21xx-ehci"
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+
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+static const char hcd_name[] = "ehci-cns21xx";
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+static struct hc_driver __read_mostly ehci_cns21xx_hc_driver;
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+
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+static void ehci_cns21xx_init_hc(void)
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+{
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+ void __iomem *base = (void __iomem *) CNS21XX_EHCI_CONFIG_BASE_VIRT;
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+
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+ __raw_writel(0x106, base + 0x04);
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+ __raw_writel((3 << 5) | 0x2000, base + 0x40);
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+ msleep(100);
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+}
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+
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+static int ehci_cns21xx_probe(struct platform_device *pdev)
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+{
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+ struct usb_hcd *hcd;
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+ struct ehci_hcd *ehci;
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+ struct resource *res;
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+ int irq;
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+ int ret;
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+
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+ irq = platform_get_irq(pdev, 0);
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+ if (irq < 0) {
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+ dev_dbg(&pdev->dev, "no IRQ specified for %s\n",
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+ dev_name(&pdev->dev));
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+ return -ENODEV;
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+ }
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+
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+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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+ if (!res) {
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+ dev_dbg(&pdev->dev, "no base address specified for %s\n",
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+ dev_name(&pdev->dev));
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+ return -EINVAL;
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+ }
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+
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+ hcd = usb_create_hcd(&ehci_cns21xx_hc_driver, &pdev->dev,
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+ dev_name(&pdev->dev));
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+ if (!hcd)
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+ return -ENOMEM;
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+
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+ hcd->rsrc_start = res->start;
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+ hcd->rsrc_len = res->end - res->start + 1;
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+
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+ hcd->regs = devm_ioremap_resource(&pdev->dev, res);
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+ if (IS_ERR(hcd->regs)) {
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+ ret = PTR_ERR(hcd->regs);
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+ goto err_put_hcd;
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+ }
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+
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+ ehci_cns21xx_init_hc();
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+
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+ ehci = hcd_to_ehci(hcd);
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+ ehci->caps = hcd->regs;
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+
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+ ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
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+ if (ret)
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+ goto err_put_hcd;
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+
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+ platform_set_drvdata(pdev, hcd);
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+
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+ return 0;
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+
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+err_put_hcd:
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+ usb_put_hcd(hcd);
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+
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+ return ret;
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+}
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+
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+static int ehci_cns21xx_remove(struct platform_device *pdev)
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+{
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+ struct usb_hcd *hcd = platform_get_drvdata(pdev);
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+
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+ usb_remove_hcd(hcd);
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+ usb_put_hcd(hcd);
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+
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+ return 0;
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+}
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+
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+static struct platform_driver ehci_cns21xx_driver = {
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+ .probe = ehci_cns21xx_probe,
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+ .remove = ehci_cns21xx_remove,
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+ .shutdown = usb_hcd_platform_shutdown,
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+ .driver = {
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+ .owner = THIS_MODULE,
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+ .name = DRIVER_NAME,
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+ },
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+};
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+
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+static int __init ehci_cns21xx_init(void)
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+{
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+ if (usb_disabled())
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+ return -ENODEV;
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+
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+ ehci_init_driver(&ehci_cns21xx_hc_driver, NULL);
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+
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+ return platform_driver_register(&ehci_cns21xx_driver);
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+}
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+module_init(ehci_cns21xx_init);
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+
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+static void __exit ehci_cns21xx_exit(void)
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+{
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+ platform_driver_unregister(&ehci_cns21xx_driver);
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+}
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+module_exit(ehci_cns21xx_exit);
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+
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+MODULE_DESCRIPTION("Cavium Networks CNS21xx built-in EHCI controller driver");
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+MODULE_ALIAS("platform:" DRIVER_NAME);
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+MODULE_LICENSE("GPL v2");
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--- a/arch/arm/Kconfig
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+++ b/arch/arm/Kconfig
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@@ -375,6 +375,7 @@ config ARCH_CNS21XX
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select ARCH_REQUIRE_GPIOLIB
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select ARM_L1_CACHE_SHIFT_4
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select USB_ARCH_HAS_OHCI
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+ select USB_ARCH_HAS_EHCI
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help
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Support for Cavium Networks CNS21xx family.
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--- a/drivers/usb/host/Kconfig
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+++ b/drivers/usb/host/Kconfig
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@@ -249,6 +249,14 @@ config USB_W90X900_EHCI
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---help---
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Enables support for the W90X900 USB controller
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+config USB_EHCI_CNS21XX
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+ tristate "EHCI support for the Cavium CNS21XX SoCs"
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+ depends on ARCH_CNS21XX
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+ default y
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+ help
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+ Enables support for the built-in EHCI controller of the
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+ Cavium CNS21xx SoCs.
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+
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config USB_CNS3XXX_EHCI
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bool "Cavium CNS3XXX EHCI Module (DEPRECATED)"
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depends on ARCH_CNS3XXX
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--- a/drivers/usb/host/Makefile
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+++ b/drivers/usb/host/Makefile
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@@ -33,6 +33,7 @@ obj-$(CONFIG_USB_EHCI_HCD_SPEAR) += ehci
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obj-$(CONFIG_USB_EHCI_S5P) += ehci-s5p.o
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obj-$(CONFIG_USB_EHCI_HCD_AT91) += ehci-atmel.o
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obj-$(CONFIG_USB_EHCI_MSM) += ehci-msm.o
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+obj-$(CONFIG_USB_EHCI_CNS21XX) += ehci-cns21xx.o
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obj-$(CONFIG_USB_OXU210HP_HCD) += oxu210hp-hcd.o
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obj-$(CONFIG_USB_ISP116X_HCD) += isp116x-hcd.o
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