Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 358 insertions, 0 deletions

diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
new file mode 100644
index 00000000000..b9a3dae0703
--- /dev/null
+++ b/drivers/usb/core/hcd-pci.c
@@ -0,0 +1,358 @@
+/*
+ * (C) Copyright David Brownell 2000-2002
+ * 
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/config.h>
+
+#ifdef CONFIG_USB_DEBUG
+        #define DEBUG
+#else
+        #undef DEBUG
+#endif
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <linux/usb.h>
+#include "hcd.h"
+
+
+/* PCI-based HCs are normal, but custom bus glue should be ok */
+
+
+/*-------------------------------------------------------------------------*/
+
+/* configure so an HC device and id are always provided */
+/* always called with process context; sleeping is OK */
+
+/**
+ * usb_hcd_pci_probe - initialize PCI-based HCDs
+ * @dev: USB Host Controller being probed
+ * @id: pci hotplug id connecting controller to HCD framework
+ * Context: !in_interrupt()
+ *
+ * Allocates basic PCI 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_pci_probe (struct pci_dev *dev, const struct pci_device_id *id)
+{
+        struct hc_driver        *driver;
+        struct usb_hcd          *hcd;
+        int                     retval;
+
+        if (usb_disabled())
+                return -ENODEV;
+
+        if (!id || !(driver = (struct hc_driver *) id->driver_data))
+                return -EINVAL;
+
+        if (pci_enable_device (dev) < 0)
+                return -ENODEV;
+        dev->current_state = 0;
+        dev->dev.power.power_state = 0;
+        
+        if (!dev->irq) {
+                dev_err (&dev->dev,
+                        "Found HC with no IRQ.  Check BIOS/PCI %s setup!\n",
+                        pci_name(dev));
+                retval = -ENODEV;
+                goto err1;
+        }
+
+        hcd = usb_create_hcd (driver, &dev->dev, pci_name(dev));
+        if (!hcd) {
+                retval = -ENOMEM;
+                goto err1;
+        }
+
+        if (driver->flags & HCD_MEMORY) {       // EHCI, OHCI
+                hcd->rsrc_start = pci_resource_start (dev, 0);
+                hcd->rsrc_len = pci_resource_len (dev, 0);
+                if (!request_mem_region (hcd->rsrc_start, hcd->rsrc_len,
+                                driver->description)) {
+                        dev_dbg (&dev->dev, "controller already in use\n");
+                        retval = -EBUSY;
+                        goto err2;
+                }
+                hcd->regs = ioremap_nocache (hcd->rsrc_start, hcd->rsrc_len);
+                if (hcd->regs == NULL) {
+                        dev_dbg (&dev->dev, "error mapping memory\n");
+                        retval = -EFAULT;
+                        goto err3;
+                }
+
+        } else {                                // UHCI
+                int     region;
+
+                for (region = 0; region < PCI_ROM_RESOURCE; region++) {
+                        if (!(pci_resource_flags (dev, region) &
+                                        IORESOURCE_IO))
+                                continue;
+
+                        hcd->rsrc_start = pci_resource_start (dev, region);
+                        hcd->rsrc_len = pci_resource_len (dev, region);
+                        if (request_region (hcd->rsrc_start, hcd->rsrc_len,
+                                        driver->description))
+                                break;
+                }
+                if (region == PCI_ROM_RESOURCE) {
+                        dev_dbg (&dev->dev, "no i/o regions available\n");
+                        retval = -EBUSY;
+                        goto err1;
+                }
+        }
+
+#ifdef CONFIG_PCI_NAMES
+        hcd->product_desc = dev->pretty_name;
+#endif
+
+        pci_set_master (dev);
+
+        retval = usb_add_hcd (hcd, dev->irq, SA_SHIRQ);
+        if (retval != 0)
+                goto err4;
+        return retval;
+
+ err4:
+        if (driver->flags & HCD_MEMORY) {
+                iounmap (hcd->regs);
+ err3:
+                release_mem_region (hcd->rsrc_start, hcd->rsrc_len);
+        } else
+                release_region (hcd->rsrc_start, hcd->rsrc_len);
+ err2:
+        usb_put_hcd (hcd);
+ err1:
+        pci_disable_device (dev);
+        dev_err (&dev->dev, "init %s fail, %d\n", pci_name(dev), retval);
+        return retval;
+} 
+EXPORT_SYMBOL (usb_hcd_pci_probe);
+
+
+/* may be called without controller electrically present */
+/* may be called with controller, bus, and devices active */
+
+/**
+ * usb_hcd_pci_remove - shutdown processing for PCI-based HCDs
+ * @dev: USB Host Controller being removed
+ * Context: !in_interrupt()
+ *
+ * Reverses the effect of usb_hcd_pci_probe(), first invoking
+ * the HCD's stop() method.  It is always called from a thread
+ * context, normally "rmmod", "apmd", or something similar.
+ *
+ * Store this function in the HCD's struct pci_driver as remove().
+ */
+void usb_hcd_pci_remove (struct pci_dev *dev)
+{
+        struct usb_hcd          *hcd;
+
+        hcd = pci_get_drvdata(dev);
+        if (!hcd)
+                return;
+
+        usb_remove_hcd (hcd);
+        if (hcd->driver->flags & HCD_MEMORY) {
+                iounmap (hcd->regs);
+                release_mem_region (hcd->rsrc_start, hcd->rsrc_len);
+        } else {
+                release_region (hcd->rsrc_start, hcd->rsrc_len);
+        }
+        usb_put_hcd (hcd);
+        pci_disable_device(dev);
+}
+EXPORT_SYMBOL (usb_hcd_pci_remove);
+
+
+#ifdef  CONFIG_PM
+
+static char __attribute_used__ *pci_state(u32 state)
+{
+        switch (state) {
+        case 0:         return "D0";
+        case 1:         return "D1";
+        case 2:         return "D2";
+        case 3:         return "D3hot";
+        case 4:         return "D3cold";
+        }
+        return NULL;
+}
+
+/**
+ * usb_hcd_pci_suspend - power management suspend of a PCI-based HCD
+ * @dev: USB Host Controller being suspended
+ * @state: state that the controller is going into
+ *
+ * Store this function in the HCD's struct pci_driver as suspend().
+ */
+int usb_hcd_pci_suspend (struct pci_dev *dev, u32 state)
+{
+        struct usb_hcd          *hcd;
+        int                     retval = 0;
+        int                     has_pci_pm;
+
+        hcd = pci_get_drvdata(dev);
+
+        /* even when the PCI layer rejects some of the PCI calls
+         * below, HCs can try global suspend and reduce DMA traffic.
+         * PM-sensitive HCDs may already have done this.
+         */
+        has_pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
+        if (state > 4)
+                state = 4;
+
+        switch (hcd->state) {
+
+        /* entry if root hub wasn't yet suspended ... from sysfs,
+         * without autosuspend, or if USB_SUSPEND isn't configured.
+         */
+        case HC_STATE_RUNNING:
+                hcd->state = HC_STATE_QUIESCING;
+                retval = hcd->driver->suspend (hcd, state);
+                if (retval) {
+                        dev_dbg (hcd->self.controller, 
+                                        "suspend fail, retval %d\n",
+                                        retval);
+                        break;
+                }
+                hcd->state = HC_STATE_SUSPENDED;
+                /* FALLTHROUGH */
+
+        /* entry with CONFIG_USB_SUSPEND, or hcds that autosuspend: the
+         * controller and/or root hub will already have been suspended,
+         * but it won't be ready for a PCI resume call.
+         *
+         * FIXME only CONFIG_USB_SUSPEND guarantees hub_suspend() will
+         * have been called, otherwise root hub timers still run ...
+         */
+        case HC_STATE_SUSPENDED:
+                if (state <= dev->current_state)
+                        break;
+
+                /* no DMA or IRQs except in D0 */
+                if (!dev->current_state) {
+                        pci_save_state (dev);
+                        pci_disable_device (dev);
+                        free_irq (hcd->irq, hcd);
+                }
+
+                if (!has_pci_pm) {
+                        dev_dbg (hcd->self.controller, "--> PCI D0/legacy\n");
+                        break;
+                }
+
+                /* POLICY: ignore D1/D2/D3hot differences;
+                 * we know D3hot will always work.
+                 */
+                retval = pci_set_power_state (dev, state);
+                if (retval < 0 && state < 3) {
+                        retval = pci_set_power_state (dev, 3);
+                        if (retval == 0)
+                                state = 3;
+                }
+                if (retval == 0) {
+                        dev_dbg (hcd->self.controller, "--> PCI %s\n",
+                                        pci_state(dev->current_state));
+#ifdef  CONFIG_USB_SUSPEND
+                        pci_enable_wake (dev, state, hcd->remote_wakeup);
+                        pci_enable_wake (dev, 4, hcd->remote_wakeup);
+#endif
+                } else if (retval < 0) {
+                        dev_dbg (&dev->dev, "PCI %s suspend fail, %d\n",
+                                        pci_state(state), retval);
+                        (void) usb_hcd_pci_resume (dev);
+                        break;
+                }
+                break;
+        default:
+                dev_dbg (hcd->self.controller, "hcd state %d; not suspended\n",
+                        hcd->state);
+                retval = -EINVAL;
+                break;
+        }
+
+        /* update power_state **ONLY** to make sysfs happier */
+        if (retval == 0)
+                dev->dev.power.power_state = state;
+        return retval;
+}
+EXPORT_SYMBOL (usb_hcd_pci_suspend);
+
+/**
+ * usb_hcd_pci_resume - power management resume of a PCI-based HCD
+ * @dev: USB Host Controller being resumed
+ *
+ * Store this function in the HCD's struct pci_driver as resume().
+ */
+int usb_hcd_pci_resume (struct pci_dev *dev)
+{
+        struct usb_hcd          *hcd;
+        int                     retval;
+        int                     has_pci_pm;
+
+        hcd = pci_get_drvdata(dev);
+        if (hcd->state != HC_STATE_SUSPENDED) {
+                dev_dbg (hcd->self.controller, 
+                                "can't resume, not suspended!\n");
+                return 0;
+        }
+        has_pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
+
+        /* D3cold resume isn't usually reported this way... */
+        dev_dbg(hcd->self.controller, "resume from PCI %s%s\n",
+                        pci_state(dev->current_state),
+                        has_pci_pm ? "" : " (legacy)");
+
+        hcd->state = HC_STATE_RESUMING;
+
+        if (has_pci_pm)
+                pci_set_power_state (dev, 0);
+        dev->dev.power.power_state = 0;
+        retval = request_irq (dev->irq, usb_hcd_irq, SA_SHIRQ,
+                                hcd->driver->description, hcd);
+        if (retval < 0) {
+                dev_err (hcd->self.controller,
+                        "can't restore IRQ after resume!\n");
+                return retval;
+        }
+        hcd->saw_irq = 0;
+        pci_restore_state (dev);
+#ifdef  CONFIG_USB_SUSPEND
+        pci_enable_wake (dev, dev->current_state, 0);
+        pci_enable_wake (dev, 4, 0);
+#endif
+
+        retval = hcd->driver->resume (hcd);
+        if (!HC_IS_RUNNING (hcd->state)) {
+                dev_dbg (hcd->self.controller, 
+                                "resume fail, retval %d\n", retval);
+                usb_hc_died (hcd);
+        }
+
+        return retval;
+}
+EXPORT_SYMBOL (usb_hcd_pci_resume);
+
+#endif  /* CONFIG_PM */
+
+