USB: Add initial S5P EHCI driver (1bcc5aa8) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/usb/Kconfig

+1 −0

Original line number	Diff line number	Diff line
		@@ -65,6 +65,7 @@ config USB_ARCH_HAS_EHCI
		default y if ARCH_CNS3XXX
		default y if ARCH_VT8500
		default y if PLAT_SPEAR
		default y if PLAT_S5P
		default y if ARCH_MSM
		default PCI

drivers/usb/host/Kconfig

+6 −0

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		@@ -188,6 +188,12 @@ config USB_EHCI_SH
		Enables support for the on-chip EHCI controller on the SuperH.
		If you use the PCI EHCI controller, this option is not necessary.

		config USB_EHCI_S5P
		boolean "S5P EHCI support"
		depends on USB_EHCI_HCD && PLAT_S5P
		help
		Enable support for the S5P SOC's on-chip EHCI controller.

		config USB_W90X900_EHCI
		bool "W90X900(W90P910) EHCI support"
		depends on USB_EHCI_HCD && ARCH_W90X900

drivers/usb/host/ehci-hcd.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -1265,6 +1265,11 @@ MODULE_LICENSE ("GPL");
		#define PLATFORM_DRIVER tegra_ehci_driver
		#endif

		#ifdef CONFIG_USB_EHCI_S5P
		#include "ehci-s5p.c"
		#define PLATFORM_DRIVER s5p_ehci_driver
		#endif

		#if !defined(PCI_DRIVER) && !defined(PLATFORM_DRIVER) && \
		!defined(PS3_SYSTEM_BUS_DRIVER) && !defined(OF_PLATFORM_DRIVER) && \
		!defined(XILINX_OF_PLATFORM_DRIVER)

drivers/usb/host/ehci-s5p.c

0 → 100644

+201 −0

Original line number	Diff line number	Diff line
		/*
		* SAMSUNG S5P USB HOST EHCI Controller
		*
		* Copyright (C) 2011 Samsung Electronics Co.Ltd
		* Author: Jingoo Han <jg1.han@samsung.com>
		* Author: Joonyoung Shim <jy0922.shim@samsung.com>
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms of the GNU General Public License as published by the
		* Free Software Foundation; either version 2 of the License, or (at your
		* option) any later version.
		*
		*/

		#include <linux/clk.h>
		#include <linux/platform_device.h>
		#include <mach/regs-pmu.h>
		#include <plat/cpu.h>
		#include <plat/ehci.h>
		#include <plat/usb-phy.h>

		struct s5p_ehci_hcd {
		struct device *dev;
		struct usb_hcd *hcd;
		struct clk *clk;
		};

		static const struct hc_driver s5p_ehci_hc_driver = {
		.description = hcd_name,
		.product_desc = "S5P EHCI Host Controller",
		.hcd_priv_size = sizeof(struct ehci_hcd),

		.irq = ehci_irq,
		.flags = HCD_MEMORY \| HCD_USB2,

		.reset = ehci_init,
		.start = ehci_run,
		.stop = ehci_stop,
		.shutdown = ehci_shutdown,

		.get_frame_number = ehci_get_frame,

		.urb_enqueue = ehci_urb_enqueue,
		.urb_dequeue = ehci_urb_dequeue,
		.endpoint_disable = ehci_endpoint_disable,
		.endpoint_reset = ehci_endpoint_reset,

		.hub_status_data = ehci_hub_status_data,
		.hub_control = ehci_hub_control,
		.bus_suspend = ehci_bus_suspend,
		.bus_resume = ehci_bus_resume,

		.relinquish_port = ehci_relinquish_port,
		.port_handed_over = ehci_port_handed_over,

		.clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
		};

		static int s5p_ehci_probe(struct platform_device *pdev)
		{
		struct s5p_ehci_platdata *pdata;
		struct s5p_ehci_hcd *s5p_ehci;
		struct usb_hcd *hcd;
		struct ehci_hcd *ehci;
		struct resource *res;
		int irq;
		int err;

		pdata = pdev->dev.platform_data;
		if (!pdata) {
		dev_err(&pdev->dev, "No platform data defined\n");
		return -EINVAL;
		}

		s5p_ehci = kzalloc(sizeof(struct s5p_ehci_hcd), GFP_KERNEL);
		if (!s5p_ehci)
		return -ENOMEM;

		s5p_ehci->dev = &pdev->dev;

		hcd = usb_create_hcd(&s5p_ehci_hc_driver, &pdev->dev,
		dev_name(&pdev->dev));
		if (!hcd) {
		dev_err(&pdev->dev, "Unable to create HCD\n");
		err = -ENOMEM;
		goto fail_hcd;
		}

		s5p_ehci->clk = clk_get(&pdev->dev, "usbhost");

		if (IS_ERR(s5p_ehci->clk)) {
		dev_err(&pdev->dev, "Failed to get usbhost clock\n");
		err = PTR_ERR(s5p_ehci->clk);
		goto fail_clk;
		}

		err = clk_enable(s5p_ehci->clk);
		if (err)
		goto fail_clken;

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		if (!res) {
		dev_err(&pdev->dev, "Failed to get I/O memory\n");
		err = -ENXIO;
		goto fail_io;
		}

		hcd->rsrc_start = res->start;
		hcd->rsrc_len = resource_size(res);
		hcd->regs = ioremap(res->start, resource_size(res));
		if (!hcd->regs) {
		dev_err(&pdev->dev, "Failed to remap I/O memory\n");
		err = -ENOMEM;
		goto fail_io;
		}

		irq = platform_get_irq(pdev, 0);
		if (!irq) {
		dev_err(&pdev->dev, "Failed to get IRQ\n");
		err = -ENODEV;
		goto fail;
		}

		if (pdata->phy_init)
		pdata->phy_init(pdev, S5P_USB_PHY_HOST);

		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);

		err = usb_add_hcd(hcd, irq, IRQF_DISABLED \| IRQF_SHARED);
		if (err) {
		dev_err(&pdev->dev, "Failed to add USB HCD\n");
		goto fail;
		}

		platform_set_drvdata(pdev, s5p_ehci);

		return 0;

		fail:
		iounmap(hcd->regs);
		fail_io:
		clk_disable(s5p_ehci->clk);
		fail_clken:
		clk_put(s5p_ehci->clk);
		fail_clk:
		usb_put_hcd(hcd);
		fail_hcd:
		kfree(s5p_ehci);
		return err;
		}

		static int s5p_ehci_remove(struct platform_device *pdev)
		{
		struct s5p_ehci_platdata *pdata = pdev->dev.platform_data;
		struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
		struct usb_hcd *hcd = s5p_ehci->hcd;

		usb_remove_hcd(hcd);

		if (pdata && pdata->phy_exit)
		pdata->phy_exit(pdev, S5P_USB_PHY_HOST);

		iounmap(hcd->regs);

		clk_disable(s5p_ehci->clk);
		clk_put(s5p_ehci->clk);

		usb_put_hcd(hcd);
		kfree(s5p_ehci);

		return 0;
		}

		static void s5p_ehci_shutdown(struct platform_device *pdev)
		{
		struct s5p_ehci_hcd *s5p_ehci = platform_get_drvdata(pdev);
		struct usb_hcd *hcd = s5p_ehci->hcd;

		if (hcd->driver->shutdown)
		hcd->driver->shutdown(hcd);
		}

		static struct platform_driver s5p_ehci_driver = {
		.probe = s5p_ehci_probe,
		.remove = s5p_ehci_remove,
		.shutdown = s5p_ehci_shutdown,
		.driver = {
		.name = "s5p-ehci",
		.owner = THIS_MODULE,
		}
		};

		MODULE_ALIAS("platform:s5p-ehci");