2005-04-17 05:20:36 +07:00
|
|
|
/*
|
2006-10-04 04:01:26 +07:00
|
|
|
* drivers/usb/core/usb.c
|
2005-04-17 05:20:36 +07:00
|
|
|
*
|
|
|
|
* (C) Copyright Linus Torvalds 1999
|
|
|
|
* (C) Copyright Johannes Erdfelt 1999-2001
|
|
|
|
* (C) Copyright Andreas Gal 1999
|
|
|
|
* (C) Copyright Gregory P. Smith 1999
|
|
|
|
* (C) Copyright Deti Fliegl 1999 (new USB architecture)
|
|
|
|
* (C) Copyright Randy Dunlap 2000
|
|
|
|
* (C) Copyright David Brownell 2000-2004
|
|
|
|
* (C) Copyright Yggdrasil Computing, Inc. 2000
|
|
|
|
* (usb_device_id matching changes by Adam J. Richter)
|
|
|
|
* (C) Copyright Greg Kroah-Hartman 2002-2003
|
|
|
|
*
|
|
|
|
* NOTE! This is not actually a driver at all, rather this is
|
|
|
|
* just a collection of helper routines that implement the
|
|
|
|
* generic USB things that the real drivers can use..
|
|
|
|
*
|
|
|
|
* Think of this as a "USB library" rather than anything else.
|
|
|
|
* It should be considered a slave, with no callbacks. Callbacks
|
|
|
|
* are evil.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/module.h>
|
2007-02-21 03:00:53 +07:00
|
|
|
#include <linux/moduleparam.h>
|
2005-04-17 05:20:36 +07:00
|
|
|
#include <linux/string.h>
|
|
|
|
#include <linux/bitops.h>
|
|
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/interrupt.h> /* for in_interrupt() */
|
|
|
|
#include <linux/kmod.h>
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/spinlock.h>
|
|
|
|
#include <linux/errno.h>
|
|
|
|
#include <linux/usb.h>
|
2006-01-11 21:55:29 +07:00
|
|
|
#include <linux/mutex.h>
|
2006-09-19 21:14:07 +07:00
|
|
|
#include <linux/workqueue.h>
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
#include <asm/io.h>
|
|
|
|
#include <asm/scatterlist.h>
|
|
|
|
#include <linux/mm.h>
|
|
|
|
#include <linux/dma-mapping.h>
|
|
|
|
|
|
|
|
#include "hcd.h"
|
|
|
|
#include "usb.h"
|
|
|
|
|
|
|
|
|
|
|
|
const char *usbcore_name = "usbcore";
|
|
|
|
|
|
|
|
static int nousb; /* Disable USB when built into kernel image */
|
|
|
|
|
2007-03-14 03:37:30 +07:00
|
|
|
/* Workqueue for autosuspend and for remote wakeup of root hubs */
|
|
|
|
struct workqueue_struct *ksuspend_usb_wq;
|
2006-09-19 21:14:07 +07:00
|
|
|
|
2007-02-21 03:00:53 +07:00
|
|
|
#ifdef CONFIG_USB_SUSPEND
|
|
|
|
static int usb_autosuspend_delay = 2; /* Default delay value,
|
|
|
|
* in seconds */
|
2007-03-14 03:39:15 +07:00
|
|
|
module_param_named(autosuspend, usb_autosuspend_delay, int, 0644);
|
2007-02-21 03:00:53 +07:00
|
|
|
MODULE_PARM_DESC(autosuspend, "default autosuspend delay");
|
|
|
|
|
|
|
|
#else
|
|
|
|
#define usb_autosuspend_delay 0
|
|
|
|
#endif
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_ifnum_to_if - get the interface object with a given interface number
|
|
|
|
* @dev: the device whose current configuration is considered
|
|
|
|
* @ifnum: the desired interface
|
|
|
|
*
|
|
|
|
* This walks the device descriptor for the currently active configuration
|
|
|
|
* and returns a pointer to the interface with that particular interface
|
|
|
|
* number, or null.
|
|
|
|
*
|
|
|
|
* Note that configuration descriptors are not required to assign interface
|
|
|
|
* numbers sequentially, so that it would be incorrect to assume that
|
|
|
|
* the first interface in that descriptor corresponds to interface zero.
|
|
|
|
* This routine helps device drivers avoid such mistakes.
|
|
|
|
* However, you should make sure that you do the right thing with any
|
|
|
|
* alternate settings available for this interfaces.
|
|
|
|
*
|
|
|
|
* Don't call this function unless you are bound to one of the interfaces
|
|
|
|
* on this device or you have locked the device!
|
|
|
|
*/
|
2006-08-27 09:48:11 +07:00
|
|
|
struct usb_interface *usb_ifnum_to_if(const struct usb_device *dev,
|
|
|
|
unsigned ifnum)
|
2005-04-17 05:20:36 +07:00
|
|
|
{
|
|
|
|
struct usb_host_config *config = dev->actconfig;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (!config)
|
|
|
|
return NULL;
|
|
|
|
for (i = 0; i < config->desc.bNumInterfaces; i++)
|
|
|
|
if (config->interface[i]->altsetting[0]
|
|
|
|
.desc.bInterfaceNumber == ifnum)
|
|
|
|
return config->interface[i];
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_altnum_to_altsetting - get the altsetting structure with a given
|
|
|
|
* alternate setting number.
|
|
|
|
* @intf: the interface containing the altsetting in question
|
|
|
|
* @altnum: the desired alternate setting number
|
|
|
|
*
|
|
|
|
* This searches the altsetting array of the specified interface for
|
|
|
|
* an entry with the correct bAlternateSetting value and returns a pointer
|
|
|
|
* to that entry, or null.
|
|
|
|
*
|
|
|
|
* Note that altsettings need not be stored sequentially by number, so
|
|
|
|
* it would be incorrect to assume that the first altsetting entry in
|
|
|
|
* the array corresponds to altsetting zero. This routine helps device
|
|
|
|
* drivers avoid such mistakes.
|
|
|
|
*
|
|
|
|
* Don't call this function unless you are bound to the intf interface
|
|
|
|
* or you have locked the device!
|
|
|
|
*/
|
2006-08-27 09:48:11 +07:00
|
|
|
struct usb_host_interface *usb_altnum_to_altsetting(const struct usb_interface *intf,
|
|
|
|
unsigned int altnum)
|
2005-04-17 05:20:36 +07:00
|
|
|
{
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i < intf->num_altsetting; i++) {
|
|
|
|
if (intf->altsetting[i].desc.bAlternateSetting == altnum)
|
|
|
|
return &intf->altsetting[i];
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
2005-12-22 08:24:54 +07:00
|
|
|
struct find_interface_arg {
|
|
|
|
int minor;
|
|
|
|
struct usb_interface *interface;
|
|
|
|
};
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2005-03-22 02:09:40 +07:00
|
|
|
static int __find_interface(struct device * dev, void * data)
|
|
|
|
{
|
2005-12-22 08:24:54 +07:00
|
|
|
struct find_interface_arg *arg = data;
|
|
|
|
struct usb_interface *intf;
|
2005-03-22 02:09:40 +07:00
|
|
|
|
|
|
|
/* can't look at usb devices, only interfaces */
|
2006-07-02 09:08:49 +07:00
|
|
|
if (is_usb_device(dev))
|
2005-03-22 02:09:40 +07:00
|
|
|
return 0;
|
|
|
|
|
|
|
|
intf = to_usb_interface(dev);
|
2005-12-22 08:24:54 +07:00
|
|
|
if (intf->minor != -1 && intf->minor == arg->minor) {
|
|
|
|
arg->interface = intf;
|
2005-03-22 02:09:40 +07:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
/**
|
|
|
|
* usb_find_interface - find usb_interface pointer for driver and device
|
|
|
|
* @drv: the driver whose current configuration is considered
|
|
|
|
* @minor: the minor number of the desired device
|
|
|
|
*
|
|
|
|
* This walks the driver device list and returns a pointer to the interface
|
|
|
|
* with the matching minor. Note, this only works for devices that share the
|
|
|
|
* USB major number.
|
|
|
|
*/
|
|
|
|
struct usb_interface *usb_find_interface(struct usb_driver *drv, int minor)
|
|
|
|
{
|
2005-12-22 08:24:54 +07:00
|
|
|
struct find_interface_arg argb;
|
2006-08-29 01:43:25 +07:00
|
|
|
int retval;
|
2005-04-17 05:20:36 +07:00
|
|
|
|
2005-12-22 08:24:54 +07:00
|
|
|
argb.minor = minor;
|
|
|
|
argb.interface = NULL;
|
2006-08-29 01:43:25 +07:00
|
|
|
/* eat the error, it will be in argb.interface */
|
|
|
|
retval = driver_for_each_device(&drv->drvwrap.driver, NULL, &argb,
|
|
|
|
__find_interface);
|
2005-12-22 08:24:54 +07:00
|
|
|
return argb.interface;
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_release_dev - free a usb device structure when all users of it are finished.
|
|
|
|
* @dev: device that's been disconnected
|
|
|
|
*
|
|
|
|
* Will be called only by the device core when all users of this usb device are
|
|
|
|
* done.
|
|
|
|
*/
|
|
|
|
static void usb_release_dev(struct device *dev)
|
|
|
|
{
|
|
|
|
struct usb_device *udev;
|
|
|
|
|
|
|
|
udev = to_usb_device(dev);
|
|
|
|
|
|
|
|
usb_destroy_configuration(udev);
|
2006-08-30 22:32:52 +07:00
|
|
|
usb_put_hcd(bus_to_hcd(udev->bus));
|
2005-04-17 05:20:36 +07:00
|
|
|
kfree(udev->product);
|
|
|
|
kfree(udev->manufacturer);
|
|
|
|
kfree(udev->serial);
|
|
|
|
kfree(udev);
|
|
|
|
}
|
|
|
|
|
2007-03-13 21:59:31 +07:00
|
|
|
struct device_type usb_device_type = {
|
|
|
|
.name = "usb_device",
|
|
|
|
.release = usb_release_dev,
|
|
|
|
};
|
|
|
|
|
2006-08-31 02:47:02 +07:00
|
|
|
#ifdef CONFIG_PM
|
|
|
|
|
2006-09-19 21:14:07 +07:00
|
|
|
static int ksuspend_usb_init(void)
|
|
|
|
{
|
2007-05-22 20:38:39 +07:00
|
|
|
/* This workqueue is supposed to be both freezable and
|
|
|
|
* singlethreaded. Its job doesn't justify running on more
|
|
|
|
* than one CPU.
|
|
|
|
*/
|
|
|
|
ksuspend_usb_wq = create_freezeable_workqueue("ksuspend_usbd");
|
2006-09-19 21:14:07 +07:00
|
|
|
if (!ksuspend_usb_wq)
|
|
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void ksuspend_usb_cleanup(void)
|
|
|
|
{
|
|
|
|
destroy_workqueue(ksuspend_usb_wq);
|
|
|
|
}
|
|
|
|
|
2006-11-14 03:02:04 +07:00
|
|
|
#else
|
|
|
|
|
|
|
|
#define ksuspend_usb_init() 0
|
|
|
|
#define ksuspend_usb_cleanup() do {} while (0)
|
|
|
|
|
|
|
|
#endif /* CONFIG_PM */
|
2006-08-31 02:47:02 +07:00
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
/**
|
|
|
|
* usb_alloc_dev - usb device constructor (usbcore-internal)
|
|
|
|
* @parent: hub to which device is connected; null to allocate a root hub
|
|
|
|
* @bus: bus used to access the device
|
|
|
|
* @port1: one-based index of port; ignored for root hubs
|
2007-01-24 03:55:28 +07:00
|
|
|
* Context: !in_interrupt()
|
2005-04-17 05:20:36 +07:00
|
|
|
*
|
|
|
|
* Only hub drivers (including virtual root hub drivers for host
|
|
|
|
* controllers) should ever call this.
|
|
|
|
*
|
|
|
|
* This call may not be used in a non-sleeping context.
|
|
|
|
*/
|
|
|
|
struct usb_device *
|
|
|
|
usb_alloc_dev(struct usb_device *parent, struct usb_bus *bus, unsigned port1)
|
|
|
|
{
|
|
|
|
struct usb_device *dev;
|
|
|
|
|
2005-10-25 02:38:24 +07:00
|
|
|
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
|
2005-04-17 05:20:36 +07:00
|
|
|
if (!dev)
|
|
|
|
return NULL;
|
|
|
|
|
2006-08-30 22:32:52 +07:00
|
|
|
if (!usb_get_hcd(bus_to_hcd(bus))) {
|
2005-04-17 05:20:36 +07:00
|
|
|
kfree(dev);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
device_initialize(&dev->dev);
|
|
|
|
dev->dev.bus = &usb_bus_type;
|
2007-03-13 21:59:31 +07:00
|
|
|
dev->dev.type = &usb_device_type;
|
2005-04-17 05:20:36 +07:00
|
|
|
dev->dev.dma_mask = bus->controller->dma_mask;
|
|
|
|
dev->state = USB_STATE_ATTACHED;
|
|
|
|
|
|
|
|
INIT_LIST_HEAD(&dev->ep0.urb_list);
|
|
|
|
dev->ep0.desc.bLength = USB_DT_ENDPOINT_SIZE;
|
|
|
|
dev->ep0.desc.bDescriptorType = USB_DT_ENDPOINT;
|
|
|
|
/* ep0 maxpacket comes later, from device descriptor */
|
|
|
|
dev->ep_in[0] = dev->ep_out[0] = &dev->ep0;
|
|
|
|
|
|
|
|
/* Save readable and stable topology id, distinguishing devices
|
|
|
|
* by location for diagnostics, tools, driver model, etc. The
|
|
|
|
* string is a path along hub ports, from the root. Each device's
|
|
|
|
* dev->devpath will be stable until USB is re-cabled, and hubs
|
|
|
|
* are often labeled with these port numbers. The bus_id isn't
|
|
|
|
* as stable: bus->busnum changes easily from modprobe order,
|
|
|
|
* cardbus or pci hotplugging, and so on.
|
|
|
|
*/
|
2007-01-24 03:55:28 +07:00
|
|
|
if (unlikely(!parent)) {
|
|
|
|
dev->devpath[0] = '0';
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
dev->dev.parent = bus->controller;
|
2007-01-24 03:55:28 +07:00
|
|
|
sprintf(&dev->dev.bus_id[0], "usb%d", bus->busnum);
|
2005-04-17 05:20:36 +07:00
|
|
|
} else {
|
|
|
|
/* match any labeling on the hubs; it's one-based */
|
2007-01-24 03:55:28 +07:00
|
|
|
if (parent->devpath[0] == '0')
|
|
|
|
snprintf(dev->devpath, sizeof dev->devpath,
|
2005-04-17 05:20:36 +07:00
|
|
|
"%d", port1);
|
|
|
|
else
|
2007-01-24 03:55:28 +07:00
|
|
|
snprintf(dev->devpath, sizeof dev->devpath,
|
2005-04-17 05:20:36 +07:00
|
|
|
"%s.%d", parent->devpath, port1);
|
|
|
|
|
|
|
|
dev->dev.parent = &parent->dev;
|
2007-01-24 03:55:28 +07:00
|
|
|
sprintf(&dev->dev.bus_id[0], "%d-%s",
|
2005-04-17 05:20:36 +07:00
|
|
|
bus->busnum, dev->devpath);
|
|
|
|
|
|
|
|
/* hub driver sets up TT records */
|
|
|
|
}
|
|
|
|
|
2005-11-24 00:09:52 +07:00
|
|
|
dev->portnum = port1;
|
2005-04-17 05:20:36 +07:00
|
|
|
dev->bus = bus;
|
|
|
|
dev->parent = parent;
|
|
|
|
INIT_LIST_HEAD(&dev->filelist);
|
|
|
|
|
2006-08-31 02:47:02 +07:00
|
|
|
#ifdef CONFIG_PM
|
|
|
|
mutex_init(&dev->pm_mutex);
|
2006-11-22 21:57:56 +07:00
|
|
|
INIT_DELAYED_WORK(&dev->autosuspend, usb_autosuspend_work);
|
2007-02-21 03:00:53 +07:00
|
|
|
dev->autosuspend_delay = usb_autosuspend_delay * HZ;
|
2006-08-31 02:47:02 +07:00
|
|
|
#endif
|
2005-04-17 05:20:36 +07:00
|
|
|
return dev;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_get_dev - increments the reference count of the usb device structure
|
|
|
|
* @dev: the device being referenced
|
|
|
|
*
|
|
|
|
* Each live reference to a device should be refcounted.
|
|
|
|
*
|
|
|
|
* Drivers for USB interfaces should normally record such references in
|
|
|
|
* their probe() methods, when they bind to an interface, and release
|
|
|
|
* them by calling usb_put_dev(), in their disconnect() methods.
|
|
|
|
*
|
|
|
|
* A pointer to the device with the incremented reference counter is returned.
|
|
|
|
*/
|
|
|
|
struct usb_device *usb_get_dev(struct usb_device *dev)
|
|
|
|
{
|
|
|
|
if (dev)
|
|
|
|
get_device(&dev->dev);
|
|
|
|
return dev;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_put_dev - release a use of the usb device structure
|
|
|
|
* @dev: device that's been disconnected
|
|
|
|
*
|
|
|
|
* Must be called when a user of a device is finished with it. When the last
|
|
|
|
* user of the device calls this function, the memory of the device is freed.
|
|
|
|
*/
|
|
|
|
void usb_put_dev(struct usb_device *dev)
|
|
|
|
{
|
|
|
|
if (dev)
|
|
|
|
put_device(&dev->dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_get_intf - increments the reference count of the usb interface structure
|
|
|
|
* @intf: the interface being referenced
|
|
|
|
*
|
|
|
|
* Each live reference to a interface must be refcounted.
|
|
|
|
*
|
|
|
|
* Drivers for USB interfaces should normally record such references in
|
|
|
|
* their probe() methods, when they bind to an interface, and release
|
|
|
|
* them by calling usb_put_intf(), in their disconnect() methods.
|
|
|
|
*
|
|
|
|
* A pointer to the interface with the incremented reference counter is
|
|
|
|
* returned.
|
|
|
|
*/
|
|
|
|
struct usb_interface *usb_get_intf(struct usb_interface *intf)
|
|
|
|
{
|
|
|
|
if (intf)
|
|
|
|
get_device(&intf->dev);
|
|
|
|
return intf;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_put_intf - release a use of the usb interface structure
|
|
|
|
* @intf: interface that's been decremented
|
|
|
|
*
|
|
|
|
* Must be called when a user of an interface is finished with it. When the
|
|
|
|
* last user of the interface calls this function, the memory of the interface
|
|
|
|
* is freed.
|
|
|
|
*/
|
|
|
|
void usb_put_intf(struct usb_interface *intf)
|
|
|
|
{
|
|
|
|
if (intf)
|
|
|
|
put_device(&intf->dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* USB device locking
|
|
|
|
*
|
2005-11-18 05:10:32 +07:00
|
|
|
* USB devices and interfaces are locked using the semaphore in their
|
|
|
|
* embedded struct device. The hub driver guarantees that whenever a
|
|
|
|
* device is connected or disconnected, drivers are called with the
|
|
|
|
* USB device locked as well as their particular interface.
|
2005-04-17 05:20:36 +07:00
|
|
|
*
|
|
|
|
* Complications arise when several devices are to be locked at the same
|
|
|
|
* time. Only hub-aware drivers that are part of usbcore ever have to
|
2005-11-18 05:10:32 +07:00
|
|
|
* do this; nobody else needs to worry about it. The rule for locking
|
|
|
|
* is simple:
|
2005-04-17 05:20:36 +07:00
|
|
|
*
|
|
|
|
* When locking both a device and its parent, always lock the
|
|
|
|
* the parent first.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_lock_device_for_reset - cautiously acquire the lock for a
|
|
|
|
* usb device structure
|
|
|
|
* @udev: device that's being locked
|
|
|
|
* @iface: interface bound to the driver making the request (optional)
|
|
|
|
*
|
|
|
|
* Attempts to acquire the device lock, but fails if the device is
|
|
|
|
* NOTATTACHED or SUSPENDED, or if iface is specified and the interface
|
|
|
|
* is neither BINDING nor BOUND. Rather than sleeping to wait for the
|
|
|
|
* lock, the routine polls repeatedly. This is to prevent deadlock with
|
|
|
|
* disconnect; in some drivers (such as usb-storage) the disconnect()
|
2005-08-11 21:15:39 +07:00
|
|
|
* or suspend() method will block waiting for a device reset to complete.
|
2005-04-17 05:20:36 +07:00
|
|
|
*
|
|
|
|
* Returns a negative error code for failure, otherwise 1 or 0 to indicate
|
|
|
|
* that the device will or will not have to be unlocked. (0 can be
|
|
|
|
* returned when an interface is given and is BINDING, because in that
|
|
|
|
* case the driver already owns the device lock.)
|
|
|
|
*/
|
|
|
|
int usb_lock_device_for_reset(struct usb_device *udev,
|
2006-08-27 09:48:11 +07:00
|
|
|
const struct usb_interface *iface)
|
2005-04-17 05:20:36 +07:00
|
|
|
{
|
2005-08-11 21:15:39 +07:00
|
|
|
unsigned long jiffies_expire = jiffies + HZ;
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
if (udev->state == USB_STATE_NOTATTACHED)
|
|
|
|
return -ENODEV;
|
|
|
|
if (udev->state == USB_STATE_SUSPENDED)
|
|
|
|
return -EHOSTUNREACH;
|
|
|
|
if (iface) {
|
|
|
|
switch (iface->condition) {
|
|
|
|
case USB_INTERFACE_BINDING:
|
|
|
|
return 0;
|
|
|
|
case USB_INTERFACE_BOUND:
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return -EINTR;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-11-18 05:10:32 +07:00
|
|
|
while (usb_trylock_device(udev) != 0) {
|
2005-08-11 21:15:39 +07:00
|
|
|
|
|
|
|
/* If we can't acquire the lock after waiting one second,
|
|
|
|
* we're probably deadlocked */
|
|
|
|
if (time_after(jiffies, jiffies_expire))
|
|
|
|
return -EBUSY;
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
msleep(15);
|
|
|
|
if (udev->state == USB_STATE_NOTATTACHED)
|
|
|
|
return -ENODEV;
|
|
|
|
if (udev->state == USB_STATE_SUSPENDED)
|
|
|
|
return -EHOSTUNREACH;
|
|
|
|
if (iface && iface->condition != USB_INTERFACE_BOUND)
|
|
|
|
return -EINTR;
|
|
|
|
}
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static struct usb_device *match_device(struct usb_device *dev,
|
|
|
|
u16 vendor_id, u16 product_id)
|
|
|
|
{
|
|
|
|
struct usb_device *ret_dev = NULL;
|
|
|
|
int child;
|
|
|
|
|
|
|
|
dev_dbg(&dev->dev, "check for vendor %04x, product %04x ...\n",
|
|
|
|
le16_to_cpu(dev->descriptor.idVendor),
|
|
|
|
le16_to_cpu(dev->descriptor.idProduct));
|
|
|
|
|
|
|
|
/* see if this device matches */
|
|
|
|
if ((vendor_id == le16_to_cpu(dev->descriptor.idVendor)) &&
|
|
|
|
(product_id == le16_to_cpu(dev->descriptor.idProduct))) {
|
2007-01-24 03:55:28 +07:00
|
|
|
dev_dbg(&dev->dev, "matched this device!\n");
|
2005-04-17 05:20:36 +07:00
|
|
|
ret_dev = usb_get_dev(dev);
|
|
|
|
goto exit;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* look through all of the children of this device */
|
|
|
|
for (child = 0; child < dev->maxchild; ++child) {
|
|
|
|
if (dev->children[child]) {
|
2005-11-18 05:10:32 +07:00
|
|
|
usb_lock_device(dev->children[child]);
|
2005-04-17 05:20:36 +07:00
|
|
|
ret_dev = match_device(dev->children[child],
|
|
|
|
vendor_id, product_id);
|
2005-11-18 05:10:32 +07:00
|
|
|
usb_unlock_device(dev->children[child]);
|
2005-04-17 05:20:36 +07:00
|
|
|
if (ret_dev)
|
|
|
|
goto exit;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
exit:
|
|
|
|
return ret_dev;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_find_device - find a specific usb device in the system
|
|
|
|
* @vendor_id: the vendor id of the device to find
|
|
|
|
* @product_id: the product id of the device to find
|
|
|
|
*
|
|
|
|
* Returns a pointer to a struct usb_device if such a specified usb
|
|
|
|
* device is present in the system currently. The usage count of the
|
|
|
|
* device will be incremented if a device is found. Make sure to call
|
|
|
|
* usb_put_dev() when the caller is finished with the device.
|
|
|
|
*
|
|
|
|
* If a device with the specified vendor and product id is not found,
|
|
|
|
* NULL is returned.
|
|
|
|
*/
|
|
|
|
struct usb_device *usb_find_device(u16 vendor_id, u16 product_id)
|
|
|
|
{
|
|
|
|
struct list_head *buslist;
|
|
|
|
struct usb_bus *bus;
|
|
|
|
struct usb_device *dev = NULL;
|
|
|
|
|
2006-01-11 21:55:29 +07:00
|
|
|
mutex_lock(&usb_bus_list_lock);
|
2005-04-17 05:20:36 +07:00
|
|
|
for (buslist = usb_bus_list.next;
|
|
|
|
buslist != &usb_bus_list;
|
|
|
|
buslist = buslist->next) {
|
|
|
|
bus = container_of(buslist, struct usb_bus, bus_list);
|
|
|
|
if (!bus->root_hub)
|
|
|
|
continue;
|
|
|
|
usb_lock_device(bus->root_hub);
|
|
|
|
dev = match_device(bus->root_hub, vendor_id, product_id);
|
|
|
|
usb_unlock_device(bus->root_hub);
|
|
|
|
if (dev)
|
|
|
|
goto exit;
|
|
|
|
}
|
|
|
|
exit:
|
2006-01-11 21:55:29 +07:00
|
|
|
mutex_unlock(&usb_bus_list_lock);
|
2005-04-17 05:20:36 +07:00
|
|
|
return dev;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_get_current_frame_number - return current bus frame number
|
|
|
|
* @dev: the device whose bus is being queried
|
|
|
|
*
|
|
|
|
* Returns the current frame number for the USB host controller
|
|
|
|
* used with the given USB device. This can be used when scheduling
|
|
|
|
* isochronous requests.
|
|
|
|
*
|
|
|
|
* Note that different kinds of host controller have different
|
|
|
|
* "scheduling horizons". While one type might support scheduling only
|
|
|
|
* 32 frames into the future, others could support scheduling up to
|
|
|
|
* 1024 frames into the future.
|
|
|
|
*/
|
|
|
|
int usb_get_current_frame_number(struct usb_device *dev)
|
|
|
|
{
|
2007-01-24 03:55:28 +07:00
|
|
|
return usb_hcd_get_frame_number(dev);
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
/*-------------------------------------------------------------------*/
|
|
|
|
/*
|
|
|
|
* __usb_get_extra_descriptor() finds a descriptor of specific type in the
|
|
|
|
* extra field of the interface and endpoint descriptor structs.
|
|
|
|
*/
|
|
|
|
|
|
|
|
int __usb_get_extra_descriptor(char *buffer, unsigned size,
|
|
|
|
unsigned char type, void **ptr)
|
|
|
|
{
|
|
|
|
struct usb_descriptor_header *header;
|
|
|
|
|
|
|
|
while (size >= sizeof(struct usb_descriptor_header)) {
|
|
|
|
header = (struct usb_descriptor_header *)buffer;
|
|
|
|
|
|
|
|
if (header->bLength < 2) {
|
|
|
|
printk(KERN_ERR
|
|
|
|
"%s: bogus descriptor, type %d length %d\n",
|
|
|
|
usbcore_name,
|
|
|
|
header->bDescriptorType,
|
|
|
|
header->bLength);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (header->bDescriptorType == type) {
|
|
|
|
*ptr = header;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
buffer += header->bLength;
|
|
|
|
size -= header->bLength;
|
|
|
|
}
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_buffer_alloc - allocate dma-consistent buffer for URB_NO_xxx_DMA_MAP
|
|
|
|
* @dev: device the buffer will be used with
|
|
|
|
* @size: requested buffer size
|
|
|
|
* @mem_flags: affect whether allocation may block
|
|
|
|
* @dma: used to return DMA address of buffer
|
|
|
|
*
|
|
|
|
* Return value is either null (indicating no buffer could be allocated), or
|
|
|
|
* the cpu-space pointer to a buffer that may be used to perform DMA to the
|
|
|
|
* specified device. Such cpu-space buffers are returned along with the DMA
|
|
|
|
* address (through the pointer provided).
|
|
|
|
*
|
|
|
|
* These buffers are used with URB_NO_xxx_DMA_MAP set in urb->transfer_flags
|
|
|
|
* to avoid behaviors like using "DMA bounce buffers", or tying down I/O
|
|
|
|
* mapping hardware for long idle periods. The implementation varies between
|
|
|
|
* platforms, depending on details of how DMA will work to this device.
|
|
|
|
* Using these buffers also helps prevent cacheline sharing problems on
|
|
|
|
* architectures where CPU caches are not DMA-coherent.
|
|
|
|
*
|
|
|
|
* When the buffer is no longer used, free it with usb_buffer_free().
|
|
|
|
*/
|
2007-01-24 03:55:28 +07:00
|
|
|
void *usb_buffer_alloc(
|
2005-04-17 05:20:36 +07:00
|
|
|
struct usb_device *dev,
|
|
|
|
size_t size,
|
2005-10-21 14:21:58 +07:00
|
|
|
gfp_t mem_flags,
|
2005-04-17 05:20:36 +07:00
|
|
|
dma_addr_t *dma
|
|
|
|
)
|
|
|
|
{
|
2006-08-30 22:27:36 +07:00
|
|
|
if (!dev || !dev->bus)
|
2005-04-17 05:20:36 +07:00
|
|
|
return NULL;
|
2007-01-24 03:55:28 +07:00
|
|
|
return hcd_buffer_alloc(dev->bus, size, mem_flags, dma);
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_buffer_free - free memory allocated with usb_buffer_alloc()
|
|
|
|
* @dev: device the buffer was used with
|
|
|
|
* @size: requested buffer size
|
|
|
|
* @addr: CPU address of buffer
|
|
|
|
* @dma: DMA address of buffer
|
|
|
|
*
|
|
|
|
* This reclaims an I/O buffer, letting it be reused. The memory must have
|
|
|
|
* been allocated using usb_buffer_alloc(), and the parameters must match
|
|
|
|
* those provided in that allocation request.
|
|
|
|
*/
|
2007-01-24 03:55:28 +07:00
|
|
|
void usb_buffer_free(
|
2005-04-17 05:20:36 +07:00
|
|
|
struct usb_device *dev,
|
|
|
|
size_t size,
|
|
|
|
void *addr,
|
|
|
|
dma_addr_t dma
|
|
|
|
)
|
|
|
|
{
|
2006-08-30 22:27:36 +07:00
|
|
|
if (!dev || !dev->bus)
|
2006-08-02 09:33:34 +07:00
|
|
|
return;
|
|
|
|
if (!addr)
|
|
|
|
return;
|
2007-01-24 03:55:28 +07:00
|
|
|
hcd_buffer_free(dev->bus, size, addr, dma);
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_buffer_map - create DMA mapping(s) for an urb
|
|
|
|
* @urb: urb whose transfer_buffer/setup_packet will be mapped
|
|
|
|
*
|
|
|
|
* Return value is either null (indicating no buffer could be mapped), or
|
|
|
|
* the parameter. URB_NO_TRANSFER_DMA_MAP and URB_NO_SETUP_DMA_MAP are
|
|
|
|
* added to urb->transfer_flags if the operation succeeds. If the device
|
|
|
|
* is connected to this system through a non-DMA controller, this operation
|
|
|
|
* always succeeds.
|
|
|
|
*
|
|
|
|
* This call would normally be used for an urb which is reused, perhaps
|
|
|
|
* as the target of a large periodic transfer, with usb_buffer_dmasync()
|
|
|
|
* calls to synchronize memory and dma state.
|
|
|
|
*
|
|
|
|
* Reverse the effect of this call with usb_buffer_unmap().
|
|
|
|
*/
|
|
|
|
#if 0
|
2007-01-24 03:55:28 +07:00
|
|
|
struct urb *usb_buffer_map(struct urb *urb)
|
2005-04-17 05:20:36 +07:00
|
|
|
{
|
|
|
|
struct usb_bus *bus;
|
|
|
|
struct device *controller;
|
|
|
|
|
|
|
|
if (!urb
|
|
|
|
|| !urb->dev
|
|
|
|
|| !(bus = urb->dev->bus)
|
|
|
|
|| !(controller = bus->controller))
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
if (controller->dma_mask) {
|
2007-01-24 03:55:28 +07:00
|
|
|
urb->transfer_dma = dma_map_single(controller,
|
2005-04-17 05:20:36 +07:00
|
|
|
urb->transfer_buffer, urb->transfer_buffer_length,
|
2007-01-24 03:55:28 +07:00
|
|
|
usb_pipein(urb->pipe)
|
2005-04-17 05:20:36 +07:00
|
|
|
? DMA_FROM_DEVICE : DMA_TO_DEVICE);
|
2007-01-24 03:55:28 +07:00
|
|
|
if (usb_pipecontrol(urb->pipe))
|
|
|
|
urb->setup_dma = dma_map_single(controller,
|
2005-04-17 05:20:36 +07:00
|
|
|
urb->setup_packet,
|
2007-01-24 03:55:28 +07:00
|
|
|
sizeof(struct usb_ctrlrequest),
|
2005-04-17 05:20:36 +07:00
|
|
|
DMA_TO_DEVICE);
|
|
|
|
// FIXME generic api broken like pci, can't report errors
|
|
|
|
// if (urb->transfer_dma == DMA_ADDR_INVALID) return 0;
|
|
|
|
} else
|
|
|
|
urb->transfer_dma = ~0;
|
|
|
|
urb->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP
|
|
|
|
| URB_NO_SETUP_DMA_MAP);
|
|
|
|
return urb;
|
|
|
|
}
|
|
|
|
#endif /* 0 */
|
|
|
|
|
|
|
|
/* XXX DISABLED, no users currently. If you wish to re-enable this
|
|
|
|
* XXX please determine whether the sync is to transfer ownership of
|
|
|
|
* XXX the buffer from device to cpu or vice verse, and thusly use the
|
|
|
|
* XXX appropriate _for_{cpu,device}() method. -DaveM
|
|
|
|
*/
|
|
|
|
#if 0
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_buffer_dmasync - synchronize DMA and CPU view of buffer(s)
|
|
|
|
* @urb: urb whose transfer_buffer/setup_packet will be synchronized
|
|
|
|
*/
|
2007-01-24 03:55:28 +07:00
|
|
|
void usb_buffer_dmasync(struct urb *urb)
|
2005-04-17 05:20:36 +07:00
|
|
|
{
|
|
|
|
struct usb_bus *bus;
|
|
|
|
struct device *controller;
|
|
|
|
|
|
|
|
if (!urb
|
|
|
|
|| !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
|
|
|
|
|| !urb->dev
|
|
|
|
|| !(bus = urb->dev->bus)
|
|
|
|
|| !(controller = bus->controller))
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (controller->dma_mask) {
|
2007-01-24 03:55:28 +07:00
|
|
|
dma_sync_single(controller,
|
2005-04-17 05:20:36 +07:00
|
|
|
urb->transfer_dma, urb->transfer_buffer_length,
|
2007-01-24 03:55:28 +07:00
|
|
|
usb_pipein(urb->pipe)
|
2005-04-17 05:20:36 +07:00
|
|
|
? DMA_FROM_DEVICE : DMA_TO_DEVICE);
|
2007-01-24 03:55:28 +07:00
|
|
|
if (usb_pipecontrol(urb->pipe))
|
|
|
|
dma_sync_single(controller,
|
2005-04-17 05:20:36 +07:00
|
|
|
urb->setup_dma,
|
2007-01-24 03:55:28 +07:00
|
|
|
sizeof(struct usb_ctrlrequest),
|
2005-04-17 05:20:36 +07:00
|
|
|
DMA_TO_DEVICE);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_buffer_unmap - free DMA mapping(s) for an urb
|
|
|
|
* @urb: urb whose transfer_buffer will be unmapped
|
|
|
|
*
|
|
|
|
* Reverses the effect of usb_buffer_map().
|
|
|
|
*/
|
|
|
|
#if 0
|
2007-01-24 03:55:28 +07:00
|
|
|
void usb_buffer_unmap(struct urb *urb)
|
2005-04-17 05:20:36 +07:00
|
|
|
{
|
|
|
|
struct usb_bus *bus;
|
|
|
|
struct device *controller;
|
|
|
|
|
|
|
|
if (!urb
|
|
|
|
|| !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)
|
|
|
|
|| !urb->dev
|
|
|
|
|| !(bus = urb->dev->bus)
|
|
|
|
|| !(controller = bus->controller))
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (controller->dma_mask) {
|
2007-01-24 03:55:28 +07:00
|
|
|
dma_unmap_single(controller,
|
2005-04-17 05:20:36 +07:00
|
|
|
urb->transfer_dma, urb->transfer_buffer_length,
|
2007-01-24 03:55:28 +07:00
|
|
|
usb_pipein(urb->pipe)
|
2005-04-17 05:20:36 +07:00
|
|
|
? DMA_FROM_DEVICE : DMA_TO_DEVICE);
|
2007-01-24 03:55:28 +07:00
|
|
|
if (usb_pipecontrol(urb->pipe))
|
|
|
|
dma_unmap_single(controller,
|
2005-04-17 05:20:36 +07:00
|
|
|
urb->setup_dma,
|
2007-01-24 03:55:28 +07:00
|
|
|
sizeof(struct usb_ctrlrequest),
|
2005-04-17 05:20:36 +07:00
|
|
|
DMA_TO_DEVICE);
|
|
|
|
}
|
|
|
|
urb->transfer_flags &= ~(URB_NO_TRANSFER_DMA_MAP
|
|
|
|
| URB_NO_SETUP_DMA_MAP);
|
|
|
|
}
|
|
|
|
#endif /* 0 */
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_buffer_map_sg - create scatterlist DMA mapping(s) for an endpoint
|
|
|
|
* @dev: device to which the scatterlist will be mapped
|
|
|
|
* @pipe: endpoint defining the mapping direction
|
|
|
|
* @sg: the scatterlist to map
|
|
|
|
* @nents: the number of entries in the scatterlist
|
|
|
|
*
|
|
|
|
* Return value is either < 0 (indicating no buffers could be mapped), or
|
|
|
|
* the number of DMA mapping array entries in the scatterlist.
|
|
|
|
*
|
|
|
|
* The caller is responsible for placing the resulting DMA addresses from
|
|
|
|
* the scatterlist into URB transfer buffer pointers, and for setting the
|
|
|
|
* URB_NO_TRANSFER_DMA_MAP transfer flag in each of those URBs.
|
|
|
|
*
|
|
|
|
* Top I/O rates come from queuing URBs, instead of waiting for each one
|
|
|
|
* to complete before starting the next I/O. This is particularly easy
|
|
|
|
* to do with scatterlists. Just allocate and submit one URB for each DMA
|
|
|
|
* mapping entry returned, stopping on the first error or when all succeed.
|
|
|
|
* Better yet, use the usb_sg_*() calls, which do that (and more) for you.
|
|
|
|
*
|
|
|
|
* This call would normally be used when translating scatterlist requests,
|
|
|
|
* rather than usb_buffer_map(), since on some hardware (with IOMMUs) it
|
|
|
|
* may be able to coalesce mappings for improved I/O efficiency.
|
|
|
|
*
|
|
|
|
* Reverse the effect of this call with usb_buffer_unmap_sg().
|
|
|
|
*/
|
2006-08-27 09:48:11 +07:00
|
|
|
int usb_buffer_map_sg(const struct usb_device *dev, unsigned pipe,
|
|
|
|
struct scatterlist *sg, int nents)
|
2005-04-17 05:20:36 +07:00
|
|
|
{
|
|
|
|
struct usb_bus *bus;
|
|
|
|
struct device *controller;
|
|
|
|
|
|
|
|
if (!dev
|
2007-01-24 03:55:28 +07:00
|
|
|
|| usb_pipecontrol(pipe)
|
2005-04-17 05:20:36 +07:00
|
|
|
|| !(bus = dev->bus)
|
|
|
|
|| !(controller = bus->controller)
|
|
|
|
|| !controller->dma_mask)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
// FIXME generic api broken like pci, can't report errors
|
2007-01-24 03:55:28 +07:00
|
|
|
return dma_map_sg(controller, sg, nents,
|
|
|
|
usb_pipein(pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
/* XXX DISABLED, no users currently. If you wish to re-enable this
|
|
|
|
* XXX please determine whether the sync is to transfer ownership of
|
|
|
|
* XXX the buffer from device to cpu or vice verse, and thusly use the
|
|
|
|
* XXX appropriate _for_{cpu,device}() method. -DaveM
|
|
|
|
*/
|
|
|
|
#if 0
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_buffer_dmasync_sg - synchronize DMA and CPU view of scatterlist buffer(s)
|
|
|
|
* @dev: device to which the scatterlist will be mapped
|
|
|
|
* @pipe: endpoint defining the mapping direction
|
|
|
|
* @sg: the scatterlist to synchronize
|
|
|
|
* @n_hw_ents: the positive return value from usb_buffer_map_sg
|
|
|
|
*
|
|
|
|
* Use this when you are re-using a scatterlist's data buffers for
|
|
|
|
* another USB request.
|
|
|
|
*/
|
2006-08-27 09:48:11 +07:00
|
|
|
void usb_buffer_dmasync_sg(const struct usb_device *dev, unsigned pipe,
|
|
|
|
struct scatterlist *sg, int n_hw_ents)
|
2005-04-17 05:20:36 +07:00
|
|
|
{
|
|
|
|
struct usb_bus *bus;
|
|
|
|
struct device *controller;
|
|
|
|
|
|
|
|
if (!dev
|
|
|
|
|| !(bus = dev->bus)
|
|
|
|
|| !(controller = bus->controller)
|
|
|
|
|| !controller->dma_mask)
|
|
|
|
return;
|
|
|
|
|
2007-01-24 03:55:28 +07:00
|
|
|
dma_sync_sg(controller, sg, n_hw_ents,
|
|
|
|
usb_pipein(pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/**
|
|
|
|
* usb_buffer_unmap_sg - free DMA mapping(s) for a scatterlist
|
|
|
|
* @dev: device to which the scatterlist will be mapped
|
|
|
|
* @pipe: endpoint defining the mapping direction
|
|
|
|
* @sg: the scatterlist to unmap
|
|
|
|
* @n_hw_ents: the positive return value from usb_buffer_map_sg
|
|
|
|
*
|
|
|
|
* Reverses the effect of usb_buffer_map_sg().
|
|
|
|
*/
|
2006-08-27 09:48:11 +07:00
|
|
|
void usb_buffer_unmap_sg(const struct usb_device *dev, unsigned pipe,
|
|
|
|
struct scatterlist *sg, int n_hw_ents)
|
2005-04-17 05:20:36 +07:00
|
|
|
{
|
|
|
|
struct usb_bus *bus;
|
|
|
|
struct device *controller;
|
|
|
|
|
|
|
|
if (!dev
|
|
|
|
|| !(bus = dev->bus)
|
|
|
|
|| !(controller = bus->controller)
|
|
|
|
|| !controller->dma_mask)
|
|
|
|
return;
|
|
|
|
|
2007-01-24 03:55:28 +07:00
|
|
|
dma_unmap_sg(controller, sg, n_hw_ents,
|
|
|
|
usb_pipein(pipe) ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
/* format to disable USB on kernel command line is: nousb */
|
2005-12-21 05:15:04 +07:00
|
|
|
__module_param_call("", nousb, param_set_bool, param_get_bool, &nousb, 0444);
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
/*
|
|
|
|
* for external read access to <nousb>
|
|
|
|
*/
|
|
|
|
int usb_disabled(void)
|
|
|
|
{
|
|
|
|
return nousb;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Init
|
|
|
|
*/
|
|
|
|
static int __init usb_init(void)
|
|
|
|
{
|
|
|
|
int retval;
|
|
|
|
if (nousb) {
|
2007-01-24 03:55:28 +07:00
|
|
|
pr_info("%s: USB support disabled\n", usbcore_name);
|
2005-04-17 05:20:36 +07:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2006-09-19 21:14:07 +07:00
|
|
|
retval = ksuspend_usb_init();
|
|
|
|
if (retval)
|
|
|
|
goto out;
|
2005-04-17 05:20:36 +07:00
|
|
|
retval = bus_register(&usb_bus_type);
|
|
|
|
if (retval)
|
2006-09-19 21:14:07 +07:00
|
|
|
goto bus_register_failed;
|
2005-04-17 05:20:36 +07:00
|
|
|
retval = usb_host_init();
|
|
|
|
if (retval)
|
|
|
|
goto host_init_failed;
|
|
|
|
retval = usb_major_init();
|
|
|
|
if (retval)
|
|
|
|
goto major_init_failed;
|
2005-07-31 06:05:53 +07:00
|
|
|
retval = usb_register(&usbfs_driver);
|
|
|
|
if (retval)
|
|
|
|
goto driver_register_failed;
|
2007-03-13 21:59:31 +07:00
|
|
|
retval = usb_devio_init();
|
2005-07-31 06:05:53 +07:00
|
|
|
if (retval)
|
2007-03-13 21:59:31 +07:00
|
|
|
goto usb_devio_init_failed;
|
2005-04-17 05:20:36 +07:00
|
|
|
retval = usbfs_init();
|
|
|
|
if (retval)
|
|
|
|
goto fs_init_failed;
|
|
|
|
retval = usb_hub_init();
|
|
|
|
if (retval)
|
|
|
|
goto hub_init_failed;
|
2006-07-02 09:08:49 +07:00
|
|
|
retval = usb_register_device_driver(&usb_generic_driver, THIS_MODULE);
|
2005-04-17 05:20:36 +07:00
|
|
|
if (!retval)
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
usb_hub_cleanup();
|
|
|
|
hub_init_failed:
|
|
|
|
usbfs_cleanup();
|
|
|
|
fs_init_failed:
|
2007-03-13 21:59:31 +07:00
|
|
|
usb_devio_cleanup();
|
|
|
|
usb_devio_init_failed:
|
2005-07-31 06:05:53 +07:00
|
|
|
usb_deregister(&usbfs_driver);
|
|
|
|
driver_register_failed:
|
|
|
|
usb_major_cleanup();
|
2005-04-17 05:20:36 +07:00
|
|
|
major_init_failed:
|
|
|
|
usb_host_cleanup();
|
|
|
|
host_init_failed:
|
|
|
|
bus_unregister(&usb_bus_type);
|
2006-09-19 21:14:07 +07:00
|
|
|
bus_register_failed:
|
|
|
|
ksuspend_usb_cleanup();
|
2005-04-17 05:20:36 +07:00
|
|
|
out:
|
|
|
|
return retval;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Cleanup
|
|
|
|
*/
|
|
|
|
static void __exit usb_exit(void)
|
|
|
|
{
|
|
|
|
/* This will matter if shutdown/reboot does exitcalls. */
|
|
|
|
if (nousb)
|
|
|
|
return;
|
|
|
|
|
2006-07-02 09:08:49 +07:00
|
|
|
usb_deregister_device_driver(&usb_generic_driver);
|
2005-04-17 05:20:36 +07:00
|
|
|
usb_major_cleanup();
|
|
|
|
usbfs_cleanup();
|
2005-07-31 06:05:53 +07:00
|
|
|
usb_deregister(&usbfs_driver);
|
2007-03-13 21:59:31 +07:00
|
|
|
usb_devio_cleanup();
|
2005-04-17 05:20:36 +07:00
|
|
|
usb_hub_cleanup();
|
|
|
|
usb_host_cleanup();
|
|
|
|
bus_unregister(&usb_bus_type);
|
2006-09-19 21:14:07 +07:00
|
|
|
ksuspend_usb_cleanup();
|
2005-04-17 05:20:36 +07:00
|
|
|
}
|
|
|
|
|
|
|
|
subsys_initcall(usb_init);
|
|
|
|
module_exit(usb_exit);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* USB may be built into the kernel or be built as modules.
|
|
|
|
* These symbols are exported for device (or host controller)
|
|
|
|
* driver modules to use.
|
|
|
|
*/
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(usb_disabled);
|
|
|
|
|
2005-06-30 06:53:29 +07:00
|
|
|
EXPORT_SYMBOL_GPL(usb_get_intf);
|
|
|
|
EXPORT_SYMBOL_GPL(usb_put_intf);
|
|
|
|
|
2005-04-17 05:20:36 +07:00
|
|
|
EXPORT_SYMBOL(usb_put_dev);
|
|
|
|
EXPORT_SYMBOL(usb_get_dev);
|
|
|
|
EXPORT_SYMBOL(usb_hub_tt_clear_buffer);
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(usb_lock_device_for_reset);
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(usb_find_interface);
|
|
|
|
EXPORT_SYMBOL(usb_ifnum_to_if);
|
|
|
|
EXPORT_SYMBOL(usb_altnum_to_altsetting);
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(__usb_get_extra_descriptor);
|
|
|
|
|
|
|
|
EXPORT_SYMBOL(usb_find_device);
|
|
|
|
EXPORT_SYMBOL(usb_get_current_frame_number);
|
|
|
|
|
2007-01-24 03:55:28 +07:00
|
|
|
EXPORT_SYMBOL(usb_buffer_alloc);
|
|
|
|
EXPORT_SYMBOL(usb_buffer_free);
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
#if 0
|
2007-01-24 03:55:28 +07:00
|
|
|
EXPORT_SYMBOL(usb_buffer_map);
|
|
|
|
EXPORT_SYMBOL(usb_buffer_dmasync);
|
|
|
|
EXPORT_SYMBOL(usb_buffer_unmap);
|
2005-04-17 05:20:36 +07:00
|
|
|
#endif
|
|
|
|
|
2007-01-24 03:55:28 +07:00
|
|
|
EXPORT_SYMBOL(usb_buffer_map_sg);
|
2005-04-17 05:20:36 +07:00
|
|
|
#if 0
|
2007-01-24 03:55:28 +07:00
|
|
|
EXPORT_SYMBOL(usb_buffer_dmasync_sg);
|
2005-04-17 05:20:36 +07:00
|
|
|
#endif
|
2007-01-24 03:55:28 +07:00
|
|
|
EXPORT_SYMBOL(usb_buffer_unmap_sg);
|
2005-04-17 05:20:36 +07:00
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|