Commit 1bcc5aa8 authored by Joonyoung Shim's avatar Joonyoung Shim Committed by Greg Kroah-Hartman
Browse files

USB: Add initial S5P EHCI driver 



This patch adds host USB high speed driver for samsung S5P series. This
is initial driver and we need additional implementation to support some
functions like power management.

Signed-off-by: default avatarJingoo Han <jg1.han@samsung.com>
Signed-off-by: default avatarJoonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 8f1d169f

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
Original line number Diff line number Diff line
@@ -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");