/* * 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 Rusell King et al. * * This file is licenced under the GPL. */ #include #include #include #include #include #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 static irqreturn_t usb_hcd_sa1111_hcim_irq (int irq, void *__hcd, struct pt_regs * r) { struct usb_hcd *hcd = __hcd; // unsigned long status = sa1111_readl(hcd->regs + SA1111_USB_STATUS); //dump_hci_status(hcd, "irq"); #if 0 /* may work better this way -- need to investigate further */ if (status & USB_STATUS_NIRQHCIM) { //dbg ("not normal HC interrupt; ignoring"); return; } #endif usb_hcd_irq(irq, hcd, r); /* * SA1111 seems to re-assert its interrupt immediately * after processing an interrupt. Always return IRQ_HANDLED. */ return IRQ_HANDLED; } /*-------------------------------------------------------------------------*/ void usb_hcd_sa1111_remove (struct usb_hcd *, struct sa1111_dev *); /* 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 usb_hcd **hcd_out, struct sa1111_dev *dev) { int retval; struct usb_hcd *hcd = 0; if (!request_mem_region(dev->res.start, dev->res.end - dev->res.start + 1, hcd_name)) { dbg("request_mem_region failed"); return -EBUSY; } sa1111_start_hc(dev); hcd = driver->hcd_alloc (); if (hcd == NULL){ dbg ("hcd_alloc failed"); retval = -ENOMEM; goto err1; } hcd->driver = (struct hc_driver *) driver; hcd->description = driver->description; hcd->irq = dev->irq[1]; hcd->regs = dev->mapbase; hcd->self.controller = &dev->dev; retval = hcd_buffer_create (hcd); if (retval != 0) { dbg ("pool alloc fail"); goto err1; } retval = request_irq (hcd->irq, usb_hcd_sa1111_hcim_irq, SA_INTERRUPT, hcd->description, hcd); if (retval != 0) { dbg("request_irq failed"); retval = -EBUSY; goto err2; } info ("%s (SA-1111) at 0x%p, irq %d\n", hcd->description, hcd->regs, hcd->irq); usb_bus_init (&hcd->self); hcd->self.op = &usb_hcd_operations; hcd->self.hcpriv = (void *) hcd; hcd->self.bus_name = "sa1111"; hcd->product_desc = "SA-1111 OHCI"; INIT_LIST_HEAD (&hcd->dev_list); usb_register_bus (&hcd->self); if ((retval = driver->start (hcd)) < 0) { usb_hcd_sa1111_remove(hcd, dev); return retval; } *hcd_out = hcd; return 0; err2: hcd_buffer_destroy (hcd); if (hcd) driver->hcd_free(hcd); err1: sa1111_stop_hc(dev); release_mem_region(dev->res.start, dev->res.end - dev->res.start + 1); 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) { struct usb_device *hub; void *base; info ("remove: %s, state %x", hcd->self.bus_name, hcd->state); if (in_interrupt ()) BUG (); hub = hcd->self.root_hub; hcd->state = USB_STATE_QUIESCING; dbg ("%s: roothub graceful disconnect", hcd->self.bus_name); usb_disconnect (&hub); hcd->driver->stop (hcd); hcd->state = USB_STATE_HALT; free_irq (hcd->irq, hcd); hcd_buffer_destroy (hcd); usb_deregister_bus (&hcd->self); base = hcd->regs; hcd->driver->hcd_free (hcd); sa1111_stop_hc(dev); release_mem_region(dev->res.start, dev->res.end - dev->res.start + 1); } /*-------------------------------------------------------------------------*/ static int __devinit ohci_sa1111_start (struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); int ret; ohci->hcca = dma_alloc_coherent (hcd->self.controller, sizeof *ohci->hcca, &ohci->hcca_dma, 0); if (!ohci->hcca) return -ENOMEM; memset (ohci->hcca, 0, sizeof (struct ohci_hcca)); if ((ret = ohci_mem_init (ohci)) < 0) { ohci_stop (hcd); return ret; } ohci->regs = hcd->regs; if (hc_reset (ohci) < 0) { ohci_stop (hcd); return -ENODEV; } if (hc_start (ohci) < 0) { err ("can't start %s", ohci->hcd.self.bus_name); ohci_stop (hcd); return -EBUSY; } create_debug_files (ohci); #ifdef DEBUG ohci_dump (ohci, 1); #endif return 0; } /*-------------------------------------------------------------------------*/ static const struct hc_driver ohci_sa1111_hc_driver = { .description = hcd_name, /* * generic hardware linkage */ .irq = ohci_irq, .flags = HCD_USB11, /* * basic lifecycle operations */ .start = ohci_sa1111_start, #ifdef CONFIG_PM /* suspend: ohci_sa1111_suspend, -- tbd */ /* resume: ohci_sa1111_resume, -- tbd */ #endif .stop = ohci_stop, /* * memory lifecycle (except per-request) */ .hcd_alloc = ohci_hcd_alloc, .hcd_free = ohci_hcd_free, /* * 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, }; /*-------------------------------------------------------------------------*/ static int ohci_hcd_sa1111_drv_probe(struct sa1111_dev *dev) { struct usb_hcd *hcd = NULL; int ret; if (usb_disabled()) return -ENODEV; ret = usb_hcd_sa1111_probe(&ohci_sa1111_hc_driver, &hcd, dev); if (ret == 0) sa1111_set_drvdata(dev, hcd); 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); sa1111_set_drvdata(dev, NULL); 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);