[PATCH] USB: ohci bits for the cirrus ep93xx
This patch adds OHCI glue bits for the USB host interface in the Cirrus ep93xx (arm920t) CPU. Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Acked-by: David Brownell <david-b@pacbell.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Lennert Buytenhek
Greg Kroah-Hartman
Родитель
d14feb5ee4
Коммит
a5b7474a03
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@ -23,6 +23,7 @@ config USB_ARCH_HAS_OHCI
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default y if ARCH_LH7A404
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default y if ARCH_S3C2410
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default y if PXA27x
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default y if ARCH_EP93XX
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default y if ARCH_AT91RM9200
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# PPC:
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default y if STB03xxx
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@ -0,0 +1,225 @@
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/*
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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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#include <asm/mach-types.h>
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#include <asm/hardware.h>
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static struct clk *usb_host_clock;
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static void ep93xx_start_hc(struct device *dev)
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{
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clk_enable(usb_host_clock);
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}
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static void ep93xx_stop_hc(struct device *dev)
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{
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clk_disable(usb_host_clock);
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}
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static int usb_hcd_ep93xx_probe(const struct hc_driver *driver,
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struct platform_device *pdev)
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{
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int retval;
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struct usb_hcd *hcd;
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if (pdev->resource[1].flags != IORESOURCE_IRQ) {
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pr_debug("resource[1] is not IORESOURCE_IRQ");
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return -ENOMEM;
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}
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hcd = usb_create_hcd(driver, &pdev->dev, "ep93xx");
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if (hcd == NULL)
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return -ENOMEM;
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hcd->rsrc_start = pdev->resource[0].start;
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hcd->rsrc_len = pdev->resource[0].end - pdev->resource[0].start + 1;
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if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
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usb_put_hcd(hcd);
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retval = -EBUSY;
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goto err1;
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}
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hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
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if (hcd->regs == NULL) {
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pr_debug("ioremap failed");
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retval = -ENOMEM;
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goto err2;
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}
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usb_host_clock = clk_get(&pdev->dev, "usb_host");
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ep93xx_start_hc(&pdev->dev);
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ohci_hcd_init(hcd_to_ohci(hcd));
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retval = usb_add_hcd(hcd, pdev->resource[1].start, SA_INTERRUPT);
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if (retval == 0)
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return retval;
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ep93xx_stop_hc(&pdev->dev);
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iounmap(hcd->regs);
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err2:
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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err1:
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usb_put_hcd(hcd);
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return retval;
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}
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static void usb_hcd_ep93xx_remove(struct usb_hcd *hcd,
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struct platform_device *pdev)
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{
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usb_remove_hcd(hcd);
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ep93xx_stop_hc(&pdev->dev);
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clk_put(usb_host_clock);
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iounmap(hcd->regs);
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release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
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usb_put_hcd(hcd);
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}
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static int __devinit 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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err("can't start %s", 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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.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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extern int usb_disabled(void);
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static int ohci_hcd_ep93xx_drv_probe(struct platform_device *pdev)
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{
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int ret;
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ret = -ENODEV;
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if (!usb_disabled())
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ret = usb_hcd_ep93xx_probe(&ohci_ep93xx_hc_driver, pdev);
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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_hcd_ep93xx_remove(hcd, pdev);
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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 ochi_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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ep93xx_stop_hc(&pdev->dev);
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hcd->state = HC_STATE_SUSPENDED;
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pdev->dev.power.power_state = PMSG_SUSPEND;
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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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int status;
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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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ep93xx_start_hc(&pdev->dev);
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pdev->dev.power.power_state = PMSG_ON;
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usb_hcd_resume_root_hub(hcd);
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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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#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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},
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};
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static int __init ohci_hcd_ep93xx_init(void)
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{
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return platform_driver_register(&ohci_hcd_ep93xx_driver);
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}
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static void __exit ohci_hcd_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_init(ohci_hcd_ep93xx_init);
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module_exit(ohci_hcd_ep93xx_cleanup);
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@ -901,6 +901,10 @@ MODULE_LICENSE ("GPL");
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#include "ohci-pxa27x.c"
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#endif
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#ifdef CONFIG_ARCH_EP93XX
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#include "ohci-ep93xx.c"
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#endif
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#ifdef CONFIG_SOC_AU1X00
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#include "ohci-au1xxx.c"
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#endif
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@ -919,6 +923,7 @@ MODULE_LICENSE ("GPL");
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|| defined(CONFIG_ARCH_OMAP) \
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|| defined (CONFIG_ARCH_LH7A404) \
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|| defined (CONFIG_PXA27x) \
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|| defined (CONFIG_ARCH_EP93XX) \
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|| defined (CONFIG_SOC_AU1X00) \
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|| defined (CONFIG_USB_OHCI_HCD_PPC_SOC) \
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|| defined (CONFIG_ARCH_AT91RM9200) \
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