271 lines
6.5 KiB
C
271 lines
6.5 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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* SA1111 Bus Glue
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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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* This file is licenced under the GPL.
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*/
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#include <mach/hardware.h>
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#include <asm/mach-types.h>
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#include <mach/assabet.h>
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#include <mach/badge4.h>
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#include <asm/hardware/sa1111.h>
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#ifndef CONFIG_SA1111
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#error "This file is SA-1111 bus glue. CONFIG_SA1111 must be defined."
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#endif
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extern int usb_disabled(void);
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/*-------------------------------------------------------------------------*/
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static void sa1111_start_hc(struct sa1111_dev *dev)
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{
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unsigned int usb_rst = 0;
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printk(KERN_DEBUG __FILE__
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": starting SA-1111 OHCI USB Controller\n");
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#ifdef CONFIG_SA1100_BADGE4
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if (machine_is_badge4()) {
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badge4_set_5V(BADGE4_5V_USB, 1);
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}
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#endif
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if (machine_is_xp860() ||
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machine_has_neponset() ||
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machine_is_pfs168() ||
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machine_is_badge4())
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usb_rst = USB_RESET_PWRSENSELOW | USB_RESET_PWRCTRLLOW;
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/*
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* Configure the power sense and control lines. Place the USB
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* host controller in reset.
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*/
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sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET,
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dev->mapbase + SA1111_USB_RESET);
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/*
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* Now, carefully enable the USB clock, and take
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* the USB host controller out of reset.
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*/
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sa1111_enable_device(dev);
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udelay(11);
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sa1111_writel(usb_rst, dev->mapbase + SA1111_USB_RESET);
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}
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static void sa1111_stop_hc(struct sa1111_dev *dev)
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{
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unsigned int usb_rst;
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printk(KERN_DEBUG __FILE__
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": stopping SA-1111 OHCI USB Controller\n");
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/*
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* Put the USB host controller into reset.
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*/
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usb_rst = sa1111_readl(dev->mapbase + SA1111_USB_RESET);
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sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET,
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dev->mapbase + SA1111_USB_RESET);
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/*
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* Stop the USB clock.
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*/
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sa1111_disable_device(dev);
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#ifdef CONFIG_SA1100_BADGE4
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if (machine_is_badge4()) {
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/* Disable power to the USB bus */
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badge4_set_5V(BADGE4_5V_USB, 0);
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}
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#endif
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}
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/*-------------------------------------------------------------------------*/
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#if 0
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static void dump_hci_status(struct usb_hcd *hcd, const char *label)
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{
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unsigned long status = sa1111_readl(hcd->regs + SA1111_USB_STATUS);
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dbg ("%s USB_STATUS = { %s%s%s%s%s}", label,
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((status & USB_STATUS_IRQHCIRMTWKUP) ? "IRQHCIRMTWKUP " : ""),
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((status & USB_STATUS_IRQHCIBUFFACC) ? "IRQHCIBUFFACC " : ""),
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((status & USB_STATUS_NIRQHCIM) ? "" : "IRQHCIM "),
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((status & USB_STATUS_NHCIMFCLR) ? "" : "HCIMFCLR "),
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((status & USB_STATUS_USBPWRSENSE) ? "USBPWRSENSE " : ""));
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}
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#endif
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/*-------------------------------------------------------------------------*/
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/* configure so an HC device and id are always provided */
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/* always called with process context; sleeping is OK */
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/**
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* usb_hcd_sa1111_probe - initialize SA-1111-based HCDs
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* Context: !in_interrupt()
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*
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* Allocates basic resources for this USB host controller, and
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* then invokes the start() method for the HCD associated with it
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* through the hotplug entry's driver_data.
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*
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* Store this function in the HCD's struct pci_driver as probe().
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*/
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int usb_hcd_sa1111_probe (const struct hc_driver *driver,
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struct sa1111_dev *dev)
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{
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struct usb_hcd *hcd;
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int retval;
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hcd = usb_create_hcd (driver, &dev->dev, "sa1111");
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if (!hcd)
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return -ENOMEM;
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hcd->rsrc_start = dev->res.start;
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hcd->rsrc_len = dev->res.end - dev->res.start + 1;
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if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
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dbg("request_mem_region failed");
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retval = -EBUSY;
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goto err1;
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}
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hcd->regs = dev->mapbase;
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sa1111_start_hc(dev);
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ohci_hcd_init(hcd_to_ohci(hcd));
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retval = usb_add_hcd(hcd, dev->irq[1], IRQF_DISABLED);
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if (retval == 0)
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return retval;
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sa1111_stop_hc(dev);
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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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/* may be called without controller electrically present */
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/* may be called with controller, bus, and devices active */
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/**
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* usb_hcd_sa1111_remove - shutdown processing for SA-1111-based HCDs
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* @dev: USB Host Controller being removed
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* Context: !in_interrupt()
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*
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* Reverses the effect of usb_hcd_sa1111_probe(), first invoking
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* the HCD's stop() method. It is always called from a thread
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* context, normally "rmmod", "apmd", or something similar.
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*
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*/
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void usb_hcd_sa1111_remove (struct usb_hcd *hcd, struct sa1111_dev *dev)
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{
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usb_remove_hcd(hcd);
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sa1111_stop_hc(dev);
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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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/*-------------------------------------------------------------------------*/
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static int __devinit
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ohci_sa1111_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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/*-------------------------------------------------------------------------*/
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static const struct hc_driver ohci_sa1111_hc_driver = {
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.description = hcd_name,
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.product_desc = "SA-1111 OHCI",
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.hcd_priv_size = sizeof(struct ohci_hcd),
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/*
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* generic hardware linkage
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*/
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.irq = ohci_irq,
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.flags = HCD_USB11 | HCD_MEMORY,
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/*
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* basic lifecycle operations
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*/
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.start = ohci_sa1111_start,
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.stop = ohci_stop,
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/*
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* managing i/o requests and associated device resources
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*/
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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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/*
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* scheduling support
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*/
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.get_frame_number = ohci_get_frame,
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/*
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* root hub support
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*/
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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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/*-------------------------------------------------------------------------*/
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static int ohci_hcd_sa1111_drv_probe(struct sa1111_dev *dev)
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{
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int ret;
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if (usb_disabled())
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return -ENODEV;
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ret = usb_hcd_sa1111_probe(&ohci_sa1111_hc_driver, dev);
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return ret;
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}
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static int ohci_hcd_sa1111_drv_remove(struct sa1111_dev *dev)
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{
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struct usb_hcd *hcd = sa1111_get_drvdata(dev);
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usb_hcd_sa1111_remove(hcd, dev);
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return 0;
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}
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static struct sa1111_driver ohci_hcd_sa1111_driver = {
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.drv = {
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.name = "sa1111-ohci",
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},
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.devid = SA1111_DEVID_USB,
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.probe = ohci_hcd_sa1111_drv_probe,
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.remove = ohci_hcd_sa1111_drv_remove,
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};
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