forked from luck/tmp_suning_uos_patched
af3f233fd2
Merge the usb_hcd_ep93xx_probe() into ohci_hcd_ep93xx_drv_probe() and the usb_hcd_ep93xx_remove() into ohci_hcd_ep93xx_drv_remove(). As Alan Stern pointed out, there is no reason for them to be separate. Also, as Alan Stern suggested, eliminate the ep93xx_start_hc() and ep93xx_stop_hc() routines and simply call clk_enable() and clk_disable() directly. The extra level of redirection does not add any clarity. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Acked-by: Alan Stern <stern@rowland.harvard.edu> Cc: Lennert Buytenhek <kernel@wantstofly.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
185 lines
4.1 KiB
C
185 lines
4.1 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/signal.h>
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#include <linux/platform_device.h>
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static struct clk *usb_host_clock;
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static int ohci_ep93xx_start(struct usb_hcd *hcd)
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{
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struct ohci_hcd *ohci = hcd_to_ohci(hcd);
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int ret;
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if ((ret = ohci_init(ohci)) < 0)
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return ret;
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if ((ret = ohci_run(ohci)) < 0) {
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dev_err(hcd->self.controller, "can't start %s\n",
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hcd->self.bus_name);
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ohci_stop(hcd);
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return ret;
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}
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return 0;
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}
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static struct hc_driver ohci_ep93xx_hc_driver = {
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.description = hcd_name,
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.product_desc = "EP93xx OHCI",
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.hcd_priv_size = sizeof(struct ohci_hcd),
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.irq = ohci_irq,
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.flags = HCD_USB11 | HCD_MEMORY,
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.start = ohci_ep93xx_start,
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.stop = ohci_stop,
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.shutdown = ohci_shutdown,
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.urb_enqueue = ohci_urb_enqueue,
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.urb_dequeue = ohci_urb_dequeue,
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.endpoint_disable = ohci_endpoint_disable,
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.get_frame_number = ohci_get_frame,
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.hub_status_data = ohci_hub_status_data,
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.hub_control = ohci_hub_control,
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#ifdef CONFIG_PM
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.bus_suspend = ohci_bus_suspend,
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.bus_resume = ohci_bus_resume,
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#endif
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.start_port_reset = ohci_start_port_reset,
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};
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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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ohci_hcd_init(hcd_to_ohci(hcd));
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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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MODULE_ALIAS("platform:ep93xx-ohci");
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