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848b5b5e06
This reverts commit 018258b436.
Manjunath is no longer at Linaro, the email address bounces. Given
that, and the fact that others have reported problems with these
patches, I'm reverting them until someone from Linaro who can SUPPORT
THEM submits them.
I will no longer accept patches from linaro.com developers unless a
senior Linaro developer has signed off on them, which did not happen
with this patch set.
Reported-by: Olof Johansson <olof@lixom.net>
Cc: Manjunath Goudar <manjunath.goudar@linaro.org>
Cc: Manjunath Goudar <csmanjuvijay@gmail.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Arnd Bergmann <arnd@arndb.de>
175 lines
3.8 KiB
C
175 lines
3.8 KiB
C
/*
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* OHCI HCD (Host Controller Driver) for USB.
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*
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* (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
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* (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
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* (C) Copyright 2002 Hewlett-Packard Company
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*
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* Bus Glue for ep93xx.
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*
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* Written by Christopher Hoover <ch@hpl.hp.com>
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* Based on fragments of previous driver by Russell King et al.
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*
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* Modified for LH7A404 from ohci-sa1111.c
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* by Durgesh Pattamatta <pattamattad@sharpsec.com>
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*
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* Modified for pxa27x from ohci-lh7a404.c
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* by Nick Bane <nick@cecomputing.co.uk> 26-8-2004
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*
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* Modified for ep93xx from ohci-pxa27x.c
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* by Lennert Buytenhek <buytenh@wantstofly.org> 28-2-2006
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* Based on an earlier driver by Ray Lehtiniemi
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*
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* This file is licenced under the GPL.
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*/
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#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/signal.h>
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#include <linux/usb.h>
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#include <linux/usb/hcd.h>
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#include "ohci.h"
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#define DRIVER_DESC "OHCI EP93xx driver"
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static const char hcd_name[] = "ohci-ep93xx";
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static struct hc_driver __read_mostly ohci_ep93xx_hc_driver;
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static struct clk *usb_host_clock;
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static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev)
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{
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struct usb_hcd *hcd;
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struct resource *res;
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int irq;
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int ret;
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if (usb_disabled())
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return -ENODEV;
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irq = platform_get_irq(pdev, 0);
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if (irq < 0)
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return irq;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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return -ENXIO;
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hcd = usb_create_hcd(&ohci_ep93xx_hc_driver, &pdev->dev, "ep93xx");
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if (!hcd)
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return -ENOMEM;
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hcd->rsrc_start = res->start;
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hcd->rsrc_len = resource_size(res);
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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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usb_host_clock = devm_clk_get(&pdev->dev, NULL);
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if (IS_ERR(usb_host_clock)) {
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ret = PTR_ERR(usb_host_clock);
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goto err_put_hcd;
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}
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clk_enable(usb_host_clock);
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ret = usb_add_hcd(hcd, irq, 0);
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if (ret)
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goto err_clk_disable;
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return 0;
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err_clk_disable:
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clk_disable(usb_host_clock);
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err_put_hcd:
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usb_put_hcd(hcd);
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return ret;
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}
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static int ohci_hcd_ep93xx_drv_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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usb_remove_hcd(hcd);
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clk_disable(usb_host_clock);
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usb_put_hcd(hcd);
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return 0;
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}
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#ifdef CONFIG_PM
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static int ohci_hcd_ep93xx_drv_suspend(struct platform_device *pdev, pm_message_t state)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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if (time_before(jiffies, ohci->next_statechange))
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msleep(5);
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ohci->next_statechange = jiffies;
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clk_disable(usb_host_clock);
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return 0;
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}
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static int ohci_hcd_ep93xx_drv_resume(struct platform_device *pdev)
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{
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struct usb_hcd *hcd = platform_get_drvdata(pdev);
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struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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if (time_before(jiffies, ohci->next_statechange))
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msleep(5);
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ohci->next_statechange = jiffies;
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clk_enable(usb_host_clock);
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ohci_resume(hcd, false);
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return 0;
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}
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#endif
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static struct platform_driver ohci_hcd_ep93xx_driver = {
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.probe = ohci_hcd_ep93xx_drv_probe,
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.remove = ohci_hcd_ep93xx_drv_remove,
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.shutdown = usb_hcd_platform_shutdown,
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#ifdef CONFIG_PM
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.suspend = ohci_hcd_ep93xx_drv_suspend,
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.resume = ohci_hcd_ep93xx_drv_resume,
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#endif
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.driver = {
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.name = "ep93xx-ohci",
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.owner = THIS_MODULE,
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},
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};
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static int __init ohci_ep93xx_init(void)
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{
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if (usb_disabled())
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return -ENODEV;
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pr_info("%s: " DRIVER_DESC "\n", hcd_name);
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ohci_init_driver(&ohci_ep93xx_hc_driver, NULL);
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return platform_driver_register(&ohci_hcd_ep93xx_driver);
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}
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module_init(ohci_ep93xx_init);
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static void __exit ohci_ep93xx_cleanup(void)
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{
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platform_driver_unregister(&ohci_hcd_ep93xx_driver);
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}
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module_exit(ohci_ep93xx_cleanup);
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:ep93xx-ohci");
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