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 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 */
+
+