/* * OHCI HCD (Host Controller Driver) for USB. * * (C) Copyright 1999 Roman Weissgaerber * (C) Copyright 2000-2002 David Brownell * (C) Copyright 2002 Hewlett-Packard Company * * SA1111 Bus Glue * * Written by Christopher Hoover * Based on fragments of previous driver by Russell King et al. * * This file is licenced under the GPL. */ #include #include #include #include #ifndef CONFIG_SA1111 #error "This file is SA-1111 bus glue. CONFIG_SA1111 must be defined." #endif #define USB_STATUS 0x0118 #define USB_RESET 0x011c #define USB_IRQTEST 0x0120 #define USB_RESET_FORCEIFRESET (1 << 0) #define USB_RESET_FORCEHCRESET (1 << 1) #define USB_RESET_CLKGENRESET (1 << 2) #define USB_RESET_SIMSCALEDOWN (1 << 3) #define USB_RESET_USBINTTEST (1 << 4) #define USB_RESET_SLEEPSTBYEN (1 << 5) #define USB_RESET_PWRSENSELOW (1 << 6) #define USB_RESET_PWRCTRLLOW (1 << 7) #define USB_STATUS_IRQHCIRMTWKUP (1 << 7) #define USB_STATUS_IRQHCIBUFFACC (1 << 8) #define USB_STATUS_NIRQHCIM (1 << 9) #define USB_STATUS_NHCIMFCLR (1 << 10) #define USB_STATUS_USBPWRSENSE (1 << 11) extern int usb_disabled(void); /*-------------------------------------------------------------------------*/ static int sa1111_start_hc(struct sa1111_dev *dev) { unsigned int usb_rst = 0; int ret; printk(KERN_DEBUG "%s: starting SA-1111 OHCI USB Controller\n", __FILE__); 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 + USB_RESET); /* * Now, carefully enable the USB clock, and take * the USB host controller out of reset. */ ret = sa1111_enable_device(dev); if (ret == 0) { udelay(11); sa1111_writel(usb_rst, dev->mapbase + USB_RESET); } return ret; } static void sa1111_stop_hc(struct sa1111_dev *dev) { unsigned int usb_rst; printk(KERN_DEBUG "%s: stopping SA-1111 OHCI USB Controller\n", __FILE__); /* * Put the USB host controller into reset. */ usb_rst = sa1111_readl(dev->mapbase + USB_RESET); sa1111_writel(usb_rst | USB_RESET_FORCEIFRESET | USB_RESET_FORCEHCRESET, dev->mapbase + USB_RESET); /* * Stop the USB clock. */ sa1111_disable_device(dev); } /*-------------------------------------------------------------------------*/ #if 0 static void dump_hci_status(struct usb_hcd *hcd, const char *label) { unsigned long status = sa1111_readl(hcd->regs + 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 = resource_size(&dev->res); 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; ret = sa1111_start_hc(dev); if (ret) goto err2; ohci_hcd_init(hcd_to_ohci(hcd)); retval = usb_add_hcd(hcd, dev->irq[1], 0); if (retval == 0) return retval; sa1111_stop_hc(dev); err2: 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, .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_PM .bus_suspend = ohci_bus_suspend, .bus_resume = ohci_bus_resume, #endif .start_port_reset = ohci_start_port_reset, }; /*-------------------------------------------------------------------------*/ 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", .owner = THIS_MODULE, }, .devid = SA1111_DEVID_USB, .probe = ohci_hcd_sa1111_drv_probe, .remove = ohci_hcd_sa1111_drv_remove, };