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!
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
new file mode 100644
index 0000000..b9a3dae
--- /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 */
+
+
