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path: root/drivers/usb/host/ohci-sa1111.c
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Diffstat (limited to 'drivers/usb/host/ohci-sa1111.c')
-rw-r--r--drivers/usb/host/ohci-sa1111.c289
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);