| /* |
| * 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 |
| |
| 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 = usb_create_hcd (driver); |
| if (hcd == NULL){ |
| dbg ("hcd_alloc failed"); |
| retval = -ENOMEM; |
| goto err1; |
| } |
| ohci_hcd_init(hcd_to_ohci(hcd)); |
| |
| 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 err2; |
| } |
| |
| retval = request_irq (hcd->irq, usb_hcd_sa1111_hcim_irq, SA_INTERRUPT, |
| hcd->driver->description, hcd); |
| if (retval != 0) { |
| dbg("request_irq failed"); |
| retval = -EBUSY; |
| goto err3; |
| } |
| |
| info ("%s (SA-1111) at 0x%p, irq %d\n", |
| hcd->driver->description, hcd->regs, hcd->irq); |
| |
| hcd->self.bus_name = "sa1111"; |
| usb_register_bus (&hcd->self); |
| |
| if ((retval = driver->start (hcd)) < 0) |
| { |
| usb_hcd_sa1111_remove(hcd, dev); |
| return retval; |
| } |
| |
| *hcd_out = hcd; |
| return 0; |
| |
| err3: |
| hcd_buffer_destroy (hcd); |
| err2: |
| usb_put_hcd(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) |
| { |
| info ("remove: %s, state %x", hcd->self.bus_name, hcd->state); |
| |
| if (in_interrupt ()) |
| BUG (); |
| |
| hcd->state = USB_STATE_QUIESCING; |
| |
| dbg ("%s: roothub graceful disconnect", hcd->self.bus_name); |
| usb_disconnect (&hcd->self.root_hub); |
| |
| hcd->driver->stop (hcd); |
| hcd->state = USB_STATE_HALT; |
| |
| free_irq (hcd->irq, hcd); |
| hcd_buffer_destroy (hcd); |
| |
| usb_deregister_bus (&hcd->self); |
| |
| 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; |
| |
| 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, |
| |
| /* |
| * 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, |
| |
| /* |
| * 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) |
| { |
| 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); |