diff options
Diffstat (limited to 'drivers/usb/host/ohci-sa1111.c')
| -rw-r--r-- | drivers/usb/host/ohci-sa1111.c | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/drivers/usb/host/ohci-sa1111.c b/drivers/usb/host/ohci-sa1111.c new file mode 100644 index 000000000000..814d2be4ee7b --- /dev/null +++ b/drivers/usb/host/ohci-sa1111.c @@ -0,0 +1,289 @@ +/* + * OHCI HCD (Host Controller Driver) for USB. + * + * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> + * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> + * (C) Copyright 2002 Hewlett-Packard Company + * + * SA1111 Bus Glue + * + * Written by Christopher Hoover <ch@hpl.hp.com> + * Based on fragments of previous driver by Rusell King et al. + * + * This file is licenced under the GPL. + */ + +#include <asm/hardware.h> +#include <asm/mach-types.h> +#include <asm/arch/assabet.h> +#include <asm/arch/badge4.h> +#include <asm/hardware/sa1111.h> + +#ifndef CONFIG_SA1111 +#error "This file is SA-1111 bus glue. CONFIG_SA1111 must be defined." +#endif + +extern int usb_disabled(void); + +/*-------------------------------------------------------------------------*/ + +static void sa1111_start_hc(struct sa1111_dev *dev) +{ + unsigned int usb_rst = 0; + + printk(KERN_DEBUG __FILE__ + ": starting SA-1111 OHCI USB Controller\n"); + +#ifdef CONFIG_SA1100_BADGE4 + if (machine_is_badge4()) { + badge4_set_5V(BADGE4_5V_USB, 1); + } +#endif + + if (machine_is_xp860() || + machine_has_neponset() || + machine_is_pfs168() || + machine_is_badge4()) + usb_rst = USB_RESET_PWRSENSELOW | USB_RESET_PWRCTRLLOW; + + /* + * Configure the power sense and control lines. Place the USB + * host controller in reset. + */ + sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET, + dev->mapbase + SA1111_USB_RESET); + + /* + * Now, carefully enable the USB clock, and take + * the USB host controller out of reset. + */ + sa1111_enable_device(dev); + udelay(11); + sa1111_writel(usb_rst, dev->mapbase + SA1111_USB_RESET); +} + +static void sa1111_stop_hc(struct sa1111_dev *dev) +{ + unsigned int usb_rst; + printk(KERN_DEBUG __FILE__ + ": stopping SA-1111 OHCI USB Controller\n"); + + /* + * Put the USB host controller into reset. + */ + usb_rst = sa1111_readl(dev->mapbase + SA1111_USB_RESET); + sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET, + dev->mapbase + SA1111_USB_RESET); + + /* + * Stop the USB clock. + */ + sa1111_disable_device(dev); + +#ifdef CONFIG_SA1100_BADGE4 + if (machine_is_badge4()) { + /* Disable power to the USB bus */ + badge4_set_5V(BADGE4_5V_USB, 0); + } +#endif +} + + +/*-------------------------------------------------------------------------*/ + +#if 0 +static void dump_hci_status(struct usb_hcd *hcd, const char *label) +{ + unsigned long status = sa1111_readl(hcd->regs + SA1111_USB_STATUS); + + dbg ("%s USB_STATUS = { %s%s%s%s%s}", label, + ((status & USB_STATUS_IRQHCIRMTWKUP) ? "IRQHCIRMTWKUP " : ""), + ((status & USB_STATUS_IRQHCIBUFFACC) ? "IRQHCIBUFFACC " : ""), + ((status & USB_STATUS_NIRQHCIM) ? "" : "IRQHCIM "), + ((status & USB_STATUS_NHCIMFCLR) ? "" : "HCIMFCLR "), + ((status & USB_STATUS_USBPWRSENSE) ? "USBPWRSENSE " : "")); +} +#endif + +/*-------------------------------------------------------------------------*/ + +/* configure so an HC device and id are always provided */ +/* always called with process context; sleeping is OK */ + + +/** + * usb_hcd_sa1111_probe - initialize SA-1111-based HCDs + * Context: !in_interrupt() + * + * Allocates basic resources for this USB host controller, and + * then invokes the start() method for the HCD associated with it + * through the hotplug entry's driver_data. + * + * Store this function in the HCD's struct pci_driver as probe(). + */ +int usb_hcd_sa1111_probe (const struct hc_driver *driver, + struct sa1111_dev *dev) +{ + struct usb_hcd *hcd; + int retval; + + hcd = usb_create_hcd (driver, &dev->dev, "sa1111"); + if (!hcd) + return -ENOMEM; + hcd->rsrc_start = dev->res.start; + hcd->rsrc_len = dev->res.end - dev->res.start + 1; + + if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { + dbg("request_mem_region failed"); + retval = -EBUSY; + goto err1; + } + hcd->regs = dev->mapbase; + + sa1111_start_hc(dev); + ohci_hcd_init(hcd_to_ohci(hcd)); + + retval = usb_add_hcd(hcd, dev->irq[1], SA_INTERRUPT); + if (retval == 0) + return retval; + + sa1111_stop_hc(dev); + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + err1: + usb_put_hcd(hcd); + return retval; +} + + +/* may be called without controller electrically present */ +/* may be called with controller, bus, and devices active */ + +/** + * usb_hcd_sa1111_remove - shutdown processing for SA-1111-based HCDs + * @dev: USB Host Controller being removed + * Context: !in_interrupt() + * + * Reverses the effect of usb_hcd_sa1111_probe(), first invoking + * the HCD's stop() method. It is always called from a thread + * context, normally "rmmod", "apmd", or something similar. + * + */ +void usb_hcd_sa1111_remove (struct usb_hcd *hcd, struct sa1111_dev *dev) +{ + usb_remove_hcd(hcd); + sa1111_stop_hc(dev); + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + usb_put_hcd(hcd); +} + +/*-------------------------------------------------------------------------*/ + +static int __devinit +ohci_sa1111_start (struct usb_hcd *hcd) +{ + struct ohci_hcd *ohci = hcd_to_ohci (hcd); + int ret; + + if ((ret = ohci_init(ohci)) < 0) + return ret; + + if ((ret = ohci_run (ohci)) < 0) { + err ("can't start %s", hcd->self.bus_name); + ohci_stop (hcd); + return ret; + } + return 0; +} + +/*-------------------------------------------------------------------------*/ + +static const struct hc_driver ohci_sa1111_hc_driver = { + .description = hcd_name, + .product_desc = "SA-1111 OHCI", + .hcd_priv_size = sizeof(struct ohci_hcd), + + /* + * generic hardware linkage + */ + .irq = ohci_irq, + .flags = HCD_USB11 | HCD_MEMORY, + + /* + * basic lifecycle operations + */ + .start = ohci_sa1111_start, +#ifdef CONFIG_PM + /* suspend: ohci_sa1111_suspend, -- tbd */ + /* resume: ohci_sa1111_resume, -- tbd */ +#endif + .stop = ohci_stop, + + /* + * managing i/o requests and associated device resources + */ + .urb_enqueue = ohci_urb_enqueue, + .urb_dequeue = ohci_urb_dequeue, + .endpoint_disable = ohci_endpoint_disable, + + /* + * scheduling support + */ + .get_frame_number = ohci_get_frame, + + /* + * root hub support + */ + .hub_status_data = ohci_hub_status_data, + .hub_control = ohci_hub_control, +#ifdef CONFIG_USB_SUSPEND + .hub_suspend = ohci_hub_suspend, + .hub_resume = ohci_hub_resume, +#endif +}; + +/*-------------------------------------------------------------------------*/ + +static int ohci_hcd_sa1111_drv_probe(struct sa1111_dev *dev) +{ + int ret; + + if (usb_disabled()) + return -ENODEV; + + ret = usb_hcd_sa1111_probe(&ohci_sa1111_hc_driver, dev); + return ret; +} + +static int ohci_hcd_sa1111_drv_remove(struct sa1111_dev *dev) +{ + struct usb_hcd *hcd = sa1111_get_drvdata(dev); + + usb_hcd_sa1111_remove(hcd, dev); + return 0; +} + +static struct sa1111_driver ohci_hcd_sa1111_driver = { + .drv = { + .name = "sa1111-ohci", + }, + .devid = SA1111_DEVID_USB, + .probe = ohci_hcd_sa1111_drv_probe, + .remove = ohci_hcd_sa1111_drv_remove, +}; + +static int __init ohci_hcd_sa1111_init (void) +{ + dbg (DRIVER_INFO " (SA-1111)"); + dbg ("block sizes: ed %d td %d", + sizeof (struct ed), sizeof (struct td)); + + return sa1111_driver_register(&ohci_hcd_sa1111_driver); +} + +static void __exit ohci_hcd_sa1111_cleanup (void) +{ + sa1111_driver_unregister(&ohci_hcd_sa1111_driver); +} + +module_init (ohci_hcd_sa1111_init); +module_exit (ohci_hcd_sa1111_cleanup); |