USB: add ehci-ixp bus glue (91bc4d31) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/usb/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -50,6 +50,7 @@ config USB_ARCH_HAS_EHCI
		boolean
		default y if PPC_83xx
		default y if SOC_AU1200
		default y if ARCH_IXP4XX
		default PCI

		# ARM SA1111 chips have a non-PCI based "OHCI-compatible" USB host interface.

drivers/usb/host/Kconfig

+2 −2

Original line number	Diff line number	Diff line
		@@ -69,12 +69,12 @@ config USB_EHCI_TT_NEWSCHED

		config USB_EHCI_BIG_ENDIAN_MMIO
		bool
		depends on USB_EHCI_HCD && (PPC_CELLEB \|\| PPC_PS3 \|\| 440EPX)
		depends on USB_EHCI_HCD && (PPC_CELLEB \|\| PPC_PS3 \|\| 440EPX \|\| ARCH_IXP4XX)
		default y

		config USB_EHCI_BIG_ENDIAN_DESC
		bool
		depends on USB_EHCI_HCD && 440EPX
		depends on USB_EHCI_HCD && (440EPX \|\| ARCH_IXP4XX)
		default y

		config USB_EHCI_FSL

drivers/usb/host/ehci-hcd.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -1008,6 +1008,11 @@ MODULE_LICENSE ("GPL");
		#define PLATFORM_DRIVER ehci_orion_driver
		#endif

		#ifdef CONFIG_ARCH_IXP4XX
		#include "ehci-ixp4xx.c"
		#define PLATFORM_DRIVER ixp4xx_ehci_driver
		#endif

		#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
		!defined(PS3_SYSTEM_BUS_DRIVER)
		#error "missing bus glue for ehci-hcd"

drivers/usb/host/ehci-ixp4xx.c

0 → 100644

+152 −0

Original line number	Diff line number	Diff line
		/*
		* IXP4XX EHCI Host Controller Driver
		*
		* Author: Vladimir Barinov <vbarinov@ru.mvista.com>
		*
		* Based on "ehci-fsl.c" by Randy Vinson <rvinson@mvista.com>
		*
		* 2007 (c) MontaVista Software, Inc. 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.
		*/

		#include <linux/platform_device.h>

		static int ixp4xx_ehci_init(struct usb_hcd *hcd)
		{
		struct ehci_hcd *ehci = hcd_to_ehci(hcd);
		int retval = 0;

		ehci->big_endian_desc = 1;
		ehci->big_endian_mmio = 1;

		ehci->caps = hcd->regs + 0x100;
		ehci->regs = hcd->regs + 0x100
		+ HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
		ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);

		ehci->is_tdi_rh_tt = 1;
		ehci_reset(ehci);

		retval = ehci_init(hcd);
		if (retval)
		return retval;

		ehci_port_power(ehci, 0);

		return retval;
		}

		static const struct hc_driver ixp4xx_ehci_hc_driver = {
		.description = hcd_name,
		.product_desc = "IXP4XX EHCI Host Controller",
		.hcd_priv_size = sizeof(struct ehci_hcd),
		.irq = ehci_irq,
		.flags = HCD_MEMORY \| HCD_USB2,
		.reset = ixp4xx_ehci_init,
		.start = ehci_run,
		.stop = ehci_stop,
		.shutdown = ehci_shutdown,
		.urb_enqueue = ehci_urb_enqueue,
		.urb_dequeue = ehci_urb_dequeue,
		.endpoint_disable = ehci_endpoint_disable,
		.get_frame_number = ehci_get_frame,
		.hub_status_data = ehci_hub_status_data,
		.hub_control = ehci_hub_control,
		#if defined(CONFIG_PM)
		.bus_suspend = ehci_bus_suspend,
		.bus_resume = ehci_bus_resume,
		#endif
		};

		static int ixp4xx_ehci_probe(struct platform_device *pdev)
		{
		struct usb_hcd *hcd;
		const struct hc_driver *driver = &ixp4xx_ehci_hc_driver;
		struct resource *res;
		int irq;
		int retval;

		if (usb_disabled())
		return -ENODEV;

		res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
		if (!res) {
		dev_err(&pdev->dev,
		"Found HC with no IRQ. Check %s setup!\n",
		pdev->dev.bus_id);
		return -ENODEV;
		}
		irq = res->start;

		hcd = usb_create_hcd(driver, &pdev->dev, pdev->dev.bus_id);
		if (!hcd) {
		retval = -ENOMEM;
		goto fail_create_hcd;
		}

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		if (!res) {
		dev_err(&pdev->dev,
		"Found HC with no register addr. Check %s setup!\n",
		pdev->dev.bus_id);
		retval = -ENODEV;
		goto fail_request_resource;
		}
		hcd->rsrc_start = res->start;
		hcd->rsrc_len = res->end - res->start + 1;

		if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len,
		driver->description)) {
		dev_dbg(&pdev->dev, "controller already in use\n");
		retval = -EBUSY;
		goto fail_request_resource;
		}

		hcd->regs = ioremap_nocache(hcd->rsrc_start, hcd->rsrc_len);
		if (hcd->regs == NULL) {
		dev_dbg(&pdev->dev, "error mapping memory\n");
		retval = -EFAULT;
		goto fail_ioremap;
		}

		retval = usb_add_hcd(hcd, irq, IRQF_SHARED);
		if (retval)
		goto fail_add_hcd;

		return retval;

		fail_add_hcd:
		iounmap(hcd->regs);
		fail_ioremap:
		release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
		fail_request_resource:
		usb_put_hcd(hcd);
		fail_create_hcd:
		dev_err(&pdev->dev, "init %s fail, %d\n", pdev->dev.bus_id, retval);
		return retval;
		}

		static int ixp4xx_ehci_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);

		return 0;
		}

		MODULE_ALIAS("ixp4xx-ehci");

		static struct platform_driver ixp4xx_ehci_driver = {
		.probe = ixp4xx_ehci_probe,
		.remove = ixp4xx_ehci_remove,
		.driver = {
		.name = "ixp4xx-ehci",
		.bus = &platform_bus_type
		},
		};

drivers/usb/host/ehci.h

+5 −0

Original line number	Diff line number	Diff line
		@@ -746,6 +746,11 @@ ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc)
		#define writel_be(val, addr) out_be32((__force unsigned *)addr, val)
		#endif

		#if defined(CONFIG_ARM) && defined(CONFIG_ARCH_IXP4XX)
		#define readl_be(addr) __raw_readl((__force unsigned *)addr)
		#define writel_be(val, addr) __raw_writel(val, (__force unsigned *)addr)
		#endif

		static inline unsigned int ehci_readl(const struct ehci_hcd *ehci,
		__u32 __iomem * regs)
		{