mirror of
git://git.openwrt.org/openwrt/openwrt.git
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203 lines
4.7 KiB
C
203 lines
4.7 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 Moschip MCS814x.
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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 mcs814x from ohci-mcs814x.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/device.h>
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#include <linux/signal.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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static int usb_hcd_mcs814x_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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pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
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pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
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hcd = usb_create_hcd(driver, &pdev->dev, "mcs814x");
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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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ohci_hcd_init(hcd_to_ohci(hcd));
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retval = usb_add_hcd(hcd, pdev->resource[1].start, IRQF_DISABLED);
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if (retval == 0)
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return retval;
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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_mcs814x_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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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 ohci_mcs814x_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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ret = ohci_init(ohci);
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if (ret < 0)
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return ret;
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ret = ohci_run(ohci);
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if (ret < 0) {
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ohci_err(ohci, "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_mcs814x_hc_driver = {
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.description = hcd_name,
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.product_desc = "MCS814X 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_mcs814x_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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extern int usb_disabled(void);
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static int ohci_hcd_mcs814x_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_mcs814x_probe(&ohci_mcs814x_hc_driver, pdev);
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return ret;
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}
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static int ohci_hcd_mcs814x_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_mcs814x_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_mcs814x_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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hcd->state = HC_STATE_SUSPENDED;
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return 0;
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}
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static int ohci_hcd_mcs814x_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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ohci_finish_controller_resume(hcd);
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return 0;
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}
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#endif
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static const struct of_device_id mcs814x_ohci_id[] = {
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{ .compatible = "moschip,mcs814x-ohci" },
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{ .compatible = "ohci-le" },
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{ /* sentinel */ },
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};
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static struct platform_driver ohci_hcd_mcs814x_driver = {
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.probe = ohci_hcd_mcs814x_drv_probe,
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.remove = ohci_hcd_mcs814x_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_mcs814x_drv_suspend,
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.resume = ohci_hcd_mcs814x_drv_resume,
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#endif
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.driver = {
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.name = "mcs814x-ohci",
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.owner = THIS_MODULE,
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.of_match_table = mcs814x_ohci_id,
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},
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};
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MODULE_ALIAS("platform:mcs814x-ohci");
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