cns21xx: add initial support for the Cavium CNS21xx SoC

SVN-Revision: 24859

1 files changed, 211 insertions, 0 deletions

diff --git a/target/linux/cns21xx/patches-2.6.36/104-cns21xx-usb-ehci-support.patch b/target/linux/cns21xx/patches-2.6.36/104-cns21xx-usb-ehci-support.patch
new file mode 100644
index 0000000000..c9e442bb7e
--- /dev/null
+++ b/target/linux/cns21xx/patches-2.6.36/104-cns21xx-usb-ehci-support.patch
@@ -0,0 +1,211 @@
+--- /dev/null
++++ b/drivers/usb/host/ehci-cns21xx.c
+@@ -0,0 +1,184 @@
++/*
++ *  Copyright (c) 2008 Cavium Networks
++ *  Copyright (c) 2010 Gabor Juhos <juhosg@openwrt.org>
++ *
++ *  This file 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/platform_device.h>
++#include <linux/irq.h>
++
++#include <mach/cns21xx.h>
++
++#define DRIVER_NAME	"cns21xx-ehci"
++
++static int cns21xx_ehci_reset(struct usb_hcd *hcd)
++{
++	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
++	int ret;
++
++	ret = ehci_halt(ehci);
++	if (ret)
++		return ret;
++
++	ret = ehci_init(hcd);
++	if (ret)
++		return ret;
++
++	ehci_reset(ehci);
++	ehci_port_power(ehci, 0);
++
++	return 0;
++}
++
++static const struct hc_driver ehci_cns21xx_hc_driver = {
++	.description		= hcd_name,
++        .product_desc		= DRIVER_NAME,
++        .hcd_priv_size		= sizeof(struct ehci_hcd),
++
++	/*
++	 * generic hardware linkage
++	 */
++	.irq			= ehci_irq,
++	.flags			= HCD_MEMORY | HCD_USB2,
++
++	/*
++	 * basic lifecycle operations
++	 */
++	.reset			= cns21xx_ehci_reset,
++	.start			= ehci_run,
++	.stop			= ehci_stop,
++	.shutdown		= ehci_shutdown,
++
++	/*
++	 * managing i/o requests and associated device resources
++	 */
++	.urb_enqueue		= ehci_urb_enqueue,
++	.urb_dequeue		= ehci_urb_dequeue,
++	.endpoint_disable	= ehci_endpoint_disable,
++	.endpoint_reset		= ehci_endpoint_reset,
++
++	/*
++	 * scheduling support
++	 */
++	.get_frame_number	= ehci_get_frame,
++
++	/*
++	 * root hub support
++	 */
++	.hub_status_data	= ehci_hub_status_data,
++	.hub_control		= ehci_hub_control,
++	.relinquish_port	= ehci_relinquish_port,
++	.port_handed_over	= ehci_port_handed_over,
++
++	.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
++};
++
++static void cns21xx_ehci_init_hc(void)
++{
++	__raw_writel(0x106, CNS21XX_EHCI_CONFIG_BASE_VIRT + 0x04);
++	__raw_writel((3 << 5) | 0x2000, CNS21XX_EHCI_CONFIG_BASE_VIRT + 0x40);
++	msleep(100);
++}
++
++static int ehci_cns21xx_probe(struct platform_device *pdev)
++{
++	struct usb_hcd *hcd;
++	struct ehci_hcd *ehci;
++	struct resource *res;
++	int irq;
++	int ret;
++
++	if (usb_disabled())
++		return -ENODEV;
++
++	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
++	if (!res) {
++		dev_dbg(&pdev->dev, "no IRQ specified for %s\n",
++			dev_name(&pdev->dev));
++		return -ENODEV;
++	}
++	irq = res->start;
++
++	hcd = usb_create_hcd(&ehci_cns21xx_hc_driver, &pdev->dev,
++			     dev_name(&pdev->dev));
++	if (!hcd)
++		return -ENOMEM;
++
++	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++	if (!res) {
++		dev_dbg(&pdev->dev, "no base address specified for %s\n",
++			dev_name(&pdev->dev));
++		ret = -ENODEV;
++		goto err_put_hcd;
++	}
++	hcd->rsrc_start	= res->start;
++	hcd->rsrc_len	= res->end - res->start + 1;
++
++	if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
++		dev_dbg(&pdev->dev, "controller already in use\n");
++		ret = -EBUSY;
++		goto err_put_hcd;
++	}
++
++	hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
++	if (!hcd->regs) {
++		dev_dbg(&pdev->dev, "error mapping memory\n");
++		ret = -EFAULT;
++		goto err_release_region;
++	}
++
++	cns21xx_ehci_init_hc();
++
++	ehci = hcd_to_ehci(hcd);
++
++	ehci->caps = hcd->regs;
++	ehci->regs = hcd->regs + HC_LENGTH(readl(&ehci->caps->hc_capbase));
++	dbg_hcs_params(ehci, "reset");
++	dbg_hcc_params(ehci, "reset");
++
++	/* cache this readonly data; minimize chip reads */
++	ehci->hcs_params = readl(&ehci->caps->hcs_params);
++	ehci->sbrn = 0x20;
++
++	ret = usb_add_hcd(hcd, CNS21XX_IRQ_EHCI, IRQF_DISABLED);
++	if (ret)
++		goto err_unmap;
++
++	platform_set_drvdata(pdev, hcd);
++	return 0;
++
++err_unmap:
++	iounmap(hcd->regs);
++err_release_region:
++	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
++err_put_hcd:
++	usb_put_hcd(hcd);
++	return ret;
++}
++
++static int ehci_cns21xx_remove(struct platform_device *pdev)
++{
++	struct usb_hcd *hcd = platform_get_drvdata(pdev);
++
++	usb_remove_hcd(hcd);
++	iounmap(hcd->regs);
++	release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
++	usb_put_hcd(hcd);
++	platform_set_drvdata(pdev, NULL);
++
++	return 0;
++}
++
++static struct platform_driver ehci_cns21xx_driver = {
++	.probe		= ehci_cns21xx_probe,
++	.remove		= ehci_cns21xx_remove,
++	.driver		= {
++		.owner	= THIS_MODULE,
++		.name	= DRIVER_NAME,
++	},
++};
++
++MODULE_ALIAS("platform:" DRIVER_NAME);
+--- a/drivers/usb/host/ehci-hcd.c
++++ b/drivers/usb/host/ehci-hcd.c
+@@ -1197,6 +1197,11 @@ MODULE_LICENSE ("GPL");
+ #define	PLATFORM_DRIVER		ehci_atmel_driver
+ #endif
+ 
++#ifdef CONFIG_ARCH_CNS21XX
++#include "ehci-cns21xx.c"
++#define PLATFORM_DRIVER		ehci_cns21xx_driver
++#endif
++
+ #if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
+     !defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
+     !defined(XILINX_OF_PLATFORM_DRIVER)
+--- a/arch/arm/Kconfig
++++ b/arch/arm/Kconfig
+@@ -300,6 +300,7 @@ config ARCH_CNS21XX
+ 	select ARCH_REQUIRE_GPIOLIB
+ 	select ARM_L1_CACHE_SHIFT_4
+ 	select USB_ARCH_HAS_OHCI
++	select USB_ARCH_HAS_EHCI
+ 	help
+ 	  Support for Cavium Networks CNS21xx family.
+