1 |
1275 |
phoenix |
/*
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2 |
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* drivers/usb/usb.c
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3 |
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*
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4 |
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* (C) Copyright Linus Torvalds 1999
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5 |
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* (C) Copyright Johannes Erdfelt 1999-2001
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* (C) Copyright Andreas Gal 1999
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* (C) Copyright Gregory P. Smith 1999
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* (C) Copyright Deti Fliegl 1999 (new USB architecture)
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* (C) Copyright Randy Dunlap 2000
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* (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id)
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* (C) Copyright Yggdrasil Computing, Inc. 2000
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* (usb_device_id matching changes by Adam J. Richter)
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*
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* NOTE! This is not actually a driver at all, rather this is
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* just a collection of helper routines that implement the
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* generic USB things that the real drivers can use..
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*
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* Think of this as a "USB library" rather than anything else.
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* It should be considered a slave, with no callbacks. Callbacks
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* are evil.
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/string.h>
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#include <linux/bitops.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h> /* for in_interrupt() */
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#include <linux/kmod.h>
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#include <linux/init.h>
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#include <linux/devfs_fs_kernel.h>
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#include <linux/spinlock.h>
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#ifdef CONFIG_USB_DEBUG
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#define DEBUG
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#else
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#undef DEBUG
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#endif
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#include <linux/usb.h>
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#include "hcd.h"
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static const int usb_bandwidth_option =
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#ifdef CONFIG_USB_BANDWIDTH
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1;
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#else
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0;
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#endif
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49 |
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extern int usb_hub_init(void);
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extern void usb_hub_cleanup(void);
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/*
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* Prototypes for the device driver probing/loading functions
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*/
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static void usb_find_drivers(struct usb_device *);
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static int usb_find_interface_driver(struct usb_device *, unsigned int);
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static void usb_check_support(struct usb_device *);
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/*
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* We have a per-interface "registered driver" list.
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*/
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LIST_HEAD(usb_driver_list);
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LIST_HEAD(usb_bus_list);
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struct semaphore usb_bus_list_lock;
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devfs_handle_t usb_devfs_handle; /* /dev/usb dir. */
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static struct usb_busmap busmap;
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static struct usb_driver *usb_minors[16];
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/**
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* usb_register - register a USB driver
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* @new_driver: USB operations for the driver
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*
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* Registers a USB driver with the USB core. The list of unattached
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* interfaces will be rescanned whenever a new driver is added, allowing
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* the new driver to attach to any recognized devices.
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* Returns a negative error code on failure and 0 on success.
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*/
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int usb_register(struct usb_driver *new_driver)
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{
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if (new_driver->fops != NULL) {
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if (usb_minors[new_driver->minor/16]) {
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err("error registering %s driver", new_driver->name);
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return -EINVAL;
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}
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usb_minors[new_driver->minor/16] = new_driver;
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}
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info("registered new driver %s", new_driver->name);
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init_MUTEX(&new_driver->serialize);
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/* Add it to the list of known drivers */
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list_add_tail(&new_driver->driver_list, &usb_driver_list);
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usb_scan_devices();
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return 0;
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}
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/**
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* usb_scan_devices - scans all unclaimed USB interfaces
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*
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* Goes through all unclaimed USB interfaces, and offers them to all
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* registered USB drivers through the 'probe' function.
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* This will automatically be called after usb_register is called.
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* It is called by some of the USB subsystems after one of their subdrivers
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* are registered.
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*/
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void usb_scan_devices(void)
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{
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struct list_head *tmp;
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down (&usb_bus_list_lock);
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tmp = usb_bus_list.next;
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while (tmp != &usb_bus_list) {
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struct usb_bus *bus = list_entry(tmp,struct usb_bus, bus_list);
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tmp = tmp->next;
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usb_check_support(bus->root_hub);
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}
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up (&usb_bus_list_lock);
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}
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/*
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* This function is part of a depth-first search down the device tree,
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* removing any instances of a device driver.
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*/
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static void usb_drivers_purge(struct usb_driver *driver,struct usb_device *dev)
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{
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int i;
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if (!dev) {
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err("null device being purged!!!");
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return;
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}
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for (i=0; i<USB_MAXCHILDREN; i++)
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if (dev->children[i])
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usb_drivers_purge(driver, dev->children[i]);
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144 |
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if (!dev->actconfig)
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return;
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for (i = 0; i < dev->actconfig->bNumInterfaces; i++) {
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struct usb_interface *interface = &dev->actconfig->interface[i];
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if (interface->driver == driver) {
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down(&driver->serialize);
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driver->disconnect(dev, interface->private_data);
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up(&driver->serialize);
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/* if driver->disconnect didn't release the interface */
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if (interface->driver)
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usb_driver_release_interface(driver, interface);
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/*
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* This will go through the list looking for another
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* driver that can handle the device
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*/
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usb_find_interface_driver(dev, i);
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}
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}
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}
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/**
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* usb_deregister - unregister a USB driver
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* @driver: USB operations of the driver to unregister
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*
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* Unlinks the specified driver from the internal USB driver list.
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*/
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void usb_deregister(struct usb_driver *driver)
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{
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struct list_head *tmp;
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info("deregistering driver %s", driver->name);
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if (driver->fops != NULL)
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usb_minors[driver->minor/16] = NULL;
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/*
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* first we remove the driver, to be sure it doesn't get used by
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* another thread while we are stepping through removing entries
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*/
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list_del(&driver->driver_list);
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down (&usb_bus_list_lock);
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tmp = usb_bus_list.next;
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while (tmp != &usb_bus_list) {
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struct usb_bus *bus = list_entry(tmp,struct usb_bus,bus_list);
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tmp = tmp->next;
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usb_drivers_purge(driver, bus->root_hub);
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}
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up (&usb_bus_list_lock);
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}
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int usb_ifnum_to_ifpos(struct usb_device *dev, unsigned ifnum)
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{
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int i;
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for (i = 0; i < dev->actconfig->bNumInterfaces; i++)
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if (dev->actconfig->interface[i].altsetting[0].bInterfaceNumber == ifnum)
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return i;
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return -EINVAL;
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}
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struct usb_interface *usb_ifnum_to_if(struct usb_device *dev, unsigned ifnum)
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{
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int i;
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for (i = 0; i < dev->actconfig->bNumInterfaces; i++)
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if (dev->actconfig->interface[i].altsetting[0].bInterfaceNumber == ifnum)
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return &dev->actconfig->interface[i];
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return NULL;
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}
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struct usb_endpoint_descriptor *usb_epnum_to_ep_desc(struct usb_device *dev, unsigned epnum)
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{
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int i, j, k;
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for (i = 0; i < dev->actconfig->bNumInterfaces; i++)
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for (j = 0; j < dev->actconfig->interface[i].num_altsetting; j++)
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for (k = 0; k < dev->actconfig->interface[i].altsetting[j].bNumEndpoints; k++)
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if (epnum == dev->actconfig->interface[i].altsetting[j].endpoint[k].bEndpointAddress)
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return &dev->actconfig->interface[i].altsetting[j].endpoint[k];
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return NULL;
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}
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/*
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* usb_calc_bus_time - approximate periodic transaction time in nanoseconds
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* @speed: from dev->speed; USB_SPEED_{LOW,FULL,HIGH}
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* @is_input: true iff the transaction sends data to the host
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* @isoc: true for isochronous transactions, false for interrupt ones
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* @bytecount: how many bytes in the transaction.
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*
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* Returns approximate bus time in nanoseconds for a periodic transaction.
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* See USB 2.0 spec section 5.11.3; only periodic transfers need to be
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* scheduled in software, this function is only used for such scheduling.
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*/
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long usb_calc_bus_time (int speed, int is_input, int isoc, int bytecount)
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{
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246 |
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unsigned long tmp;
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switch (speed) {
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case USB_SPEED_LOW: /* INTR only */
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if (is_input) {
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tmp = (67667L * (31L + 10L * BitTime (bytecount))) / 1000L;
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return (64060L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp);
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} else {
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tmp = (66700L * (31L + 10L * BitTime (bytecount))) / 1000L;
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return (64107L + (2 * BW_HUB_LS_SETUP) + BW_HOST_DELAY + tmp);
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}
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257 |
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case USB_SPEED_FULL: /* ISOC or INTR */
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258 |
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if (isoc) {
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259 |
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tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L;
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260 |
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return (((is_input) ? 7268L : 6265L) + BW_HOST_DELAY + tmp);
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261 |
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} else {
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262 |
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tmp = (8354L * (31L + 10L * BitTime (bytecount))) / 1000L;
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263 |
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return (9107L + BW_HOST_DELAY + tmp);
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264 |
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}
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265 |
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case USB_SPEED_HIGH: /* ISOC or INTR */
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// FIXME adjust for input vs output
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267 |
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if (isoc)
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268 |
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tmp = HS_USECS (bytecount);
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269 |
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else
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270 |
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tmp = HS_USECS_ISO (bytecount);
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271 |
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return tmp;
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272 |
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default:
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273 |
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dbg ("bogus device speed!");
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274 |
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return -1;
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275 |
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}
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276 |
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}
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277 |
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|
278 |
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|
279 |
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/*
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280 |
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* usb_check_bandwidth():
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281 |
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*
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282 |
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* old_alloc is from host_controller->bandwidth_allocated in microseconds;
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283 |
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* bustime is from calc_bus_time(), but converted to microseconds.
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284 |
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*
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285 |
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* returns <bustime in us> if successful,
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286 |
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* or USB_ST_BANDWIDTH_ERROR if bandwidth request fails.
|
287 |
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*
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288 |
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* FIXME:
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289 |
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* This initial implementation does not use Endpoint.bInterval
|
290 |
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* in managing bandwidth allocation.
|
291 |
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* It probably needs to be expanded to use Endpoint.bInterval.
|
292 |
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* This can be done as a later enhancement (correction).
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293 |
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* This will also probably require some kind of
|
294 |
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* frame allocation tracking...meaning, for example,
|
295 |
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* that if multiple drivers request interrupts every 10 USB frames,
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296 |
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* they don't all have to be allocated at
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297 |
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* frame numbers N, N+10, N+20, etc. Some of them could be at
|
298 |
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* N+11, N+21, N+31, etc., and others at
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299 |
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* N+12, N+22, N+32, etc.
|
300 |
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* However, this first cut at USB bandwidth allocation does not
|
301 |
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* contain any frame allocation tracking.
|
302 |
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*/
|
303 |
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int usb_check_bandwidth (struct usb_device *dev, struct urb *urb)
|
304 |
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{
|
305 |
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int new_alloc;
|
306 |
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int old_alloc = dev->bus->bandwidth_allocated;
|
307 |
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unsigned int pipe = urb->pipe;
|
308 |
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long bustime;
|
309 |
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|
310 |
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bustime = usb_calc_bus_time (dev->speed, usb_pipein(pipe),
|
311 |
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usb_pipeisoc(pipe), usb_maxpacket(dev, pipe, usb_pipeout(pipe)));
|
312 |
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if (usb_pipeisoc(pipe))
|
313 |
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bustime = NS_TO_US(bustime) / urb->number_of_packets;
|
314 |
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else
|
315 |
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bustime = NS_TO_US(bustime);
|
316 |
|
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|
317 |
|
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new_alloc = old_alloc + (int)bustime;
|
318 |
|
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/* what new total allocated bus time would be */
|
319 |
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|
320 |
|
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if (new_alloc > FRAME_TIME_MAX_USECS_ALLOC)
|
321 |
|
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dbg("usb-check-bandwidth %sFAILED: was %u, would be %u, bustime = %ld us",
|
322 |
|
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usb_bandwidth_option ? "" : "would have ",
|
323 |
|
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old_alloc, new_alloc, bustime);
|
324 |
|
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|
325 |
|
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if (!usb_bandwidth_option) /* don't enforce it */
|
326 |
|
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return (bustime);
|
327 |
|
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return (new_alloc <= FRAME_TIME_MAX_USECS_ALLOC) ? bustime : USB_ST_BANDWIDTH_ERROR;
|
328 |
|
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}
|
329 |
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|
330 |
|
|
void usb_claim_bandwidth (struct usb_device *dev, struct urb *urb, int bustime, int isoc)
|
331 |
|
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{
|
332 |
|
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dev->bus->bandwidth_allocated += bustime;
|
333 |
|
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if (isoc)
|
334 |
|
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dev->bus->bandwidth_isoc_reqs++;
|
335 |
|
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else
|
336 |
|
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dev->bus->bandwidth_int_reqs++;
|
337 |
|
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urb->bandwidth = bustime;
|
338 |
|
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|
339 |
|
|
#ifdef USB_BANDWIDTH_MESSAGES
|
340 |
|
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dbg("bandwidth alloc increased by %d to %d for %d requesters",
|
341 |
|
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bustime,
|
342 |
|
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dev->bus->bandwidth_allocated,
|
343 |
|
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dev->bus->bandwidth_int_reqs + dev->bus->bandwidth_isoc_reqs);
|
344 |
|
|
#endif
|
345 |
|
|
}
|
346 |
|
|
|
347 |
|
|
/*
|
348 |
|
|
* usb_release_bandwidth():
|
349 |
|
|
*
|
350 |
|
|
* called to release a pipe's bandwidth (in microseconds)
|
351 |
|
|
*/
|
352 |
|
|
void usb_release_bandwidth(struct usb_device *dev, struct urb *urb, int isoc)
|
353 |
|
|
{
|
354 |
|
|
dev->bus->bandwidth_allocated -= urb->bandwidth;
|
355 |
|
|
if (isoc)
|
356 |
|
|
dev->bus->bandwidth_isoc_reqs--;
|
357 |
|
|
else
|
358 |
|
|
dev->bus->bandwidth_int_reqs--;
|
359 |
|
|
|
360 |
|
|
#ifdef USB_BANDWIDTH_MESSAGES
|
361 |
|
|
dbg("bandwidth alloc reduced by %d to %d for %d requesters",
|
362 |
|
|
urb->bandwidth,
|
363 |
|
|
dev->bus->bandwidth_allocated,
|
364 |
|
|
dev->bus->bandwidth_int_reqs + dev->bus->bandwidth_isoc_reqs);
|
365 |
|
|
#endif
|
366 |
|
|
urb->bandwidth = 0;
|
367 |
|
|
}
|
368 |
|
|
|
369 |
|
|
static void usb_bus_get(struct usb_bus *bus)
|
370 |
|
|
{
|
371 |
|
|
atomic_inc(&bus->refcnt);
|
372 |
|
|
}
|
373 |
|
|
|
374 |
|
|
static void usb_bus_put(struct usb_bus *bus)
|
375 |
|
|
{
|
376 |
|
|
if (atomic_dec_and_test(&bus->refcnt))
|
377 |
|
|
kfree(bus);
|
378 |
|
|
}
|
379 |
|
|
|
380 |
|
|
/**
|
381 |
|
|
* usb_alloc_bus - creates a new USB host controller structure
|
382 |
|
|
* @op: pointer to a struct usb_operations that this bus structure should use
|
383 |
|
|
*
|
384 |
|
|
* Creates a USB host controller bus structure with the specified
|
385 |
|
|
* usb_operations and initializes all the necessary internal objects.
|
386 |
|
|
* (For use only by USB Host Controller Drivers.)
|
387 |
|
|
*
|
388 |
|
|
* If no memory is available, NULL is returned.
|
389 |
|
|
*
|
390 |
|
|
* The caller should call usb_free_bus() when it is finished with the structure.
|
391 |
|
|
*/
|
392 |
|
|
struct usb_bus *usb_alloc_bus(struct usb_operations *op)
|
393 |
|
|
{
|
394 |
|
|
struct usb_bus *bus;
|
395 |
|
|
|
396 |
|
|
bus = kmalloc(sizeof(*bus), GFP_KERNEL);
|
397 |
|
|
if (!bus)
|
398 |
|
|
return NULL;
|
399 |
|
|
|
400 |
|
|
memset(&bus->devmap, 0, sizeof(struct usb_devmap));
|
401 |
|
|
|
402 |
|
|
#ifdef DEVNUM_ROUND_ROBIN
|
403 |
|
|
bus->devnum_next = 1;
|
404 |
|
|
#endif /* DEVNUM_ROUND_ROBIN */
|
405 |
|
|
|
406 |
|
|
bus->op = op;
|
407 |
|
|
bus->root_hub = NULL;
|
408 |
|
|
bus->hcpriv = NULL;
|
409 |
|
|
bus->busnum = -1;
|
410 |
|
|
bus->bandwidth_allocated = 0;
|
411 |
|
|
bus->bandwidth_int_reqs = 0;
|
412 |
|
|
bus->bandwidth_isoc_reqs = 0;
|
413 |
|
|
|
414 |
|
|
INIT_LIST_HEAD(&bus->bus_list);
|
415 |
|
|
INIT_LIST_HEAD(&bus->inodes);
|
416 |
|
|
|
417 |
|
|
atomic_set(&bus->refcnt, 1);
|
418 |
|
|
|
419 |
|
|
return bus;
|
420 |
|
|
}
|
421 |
|
|
|
422 |
|
|
/**
|
423 |
|
|
* usb_free_bus - frees the memory used by a bus structure
|
424 |
|
|
* @bus: pointer to the bus to free
|
425 |
|
|
*
|
426 |
|
|
* (For use only by USB Host Controller Drivers.)
|
427 |
|
|
*/
|
428 |
|
|
void usb_free_bus(struct usb_bus *bus)
|
429 |
|
|
{
|
430 |
|
|
if (!bus)
|
431 |
|
|
return;
|
432 |
|
|
|
433 |
|
|
usb_bus_put(bus);
|
434 |
|
|
}
|
435 |
|
|
|
436 |
|
|
/**
|
437 |
|
|
* usb_register_bus - registers the USB host controller with the usb core
|
438 |
|
|
* @bus: pointer to the bus to register
|
439 |
|
|
*
|
440 |
|
|
* (For use only by USB Host Controller Drivers.)
|
441 |
|
|
*/
|
442 |
|
|
void usb_register_bus(struct usb_bus *bus)
|
443 |
|
|
{
|
444 |
|
|
int busnum;
|
445 |
|
|
|
446 |
|
|
down (&usb_bus_list_lock);
|
447 |
|
|
busnum = find_next_zero_bit(busmap.busmap, USB_MAXBUS, 1);
|
448 |
|
|
if (busnum < USB_MAXBUS) {
|
449 |
|
|
set_bit(busnum, busmap.busmap);
|
450 |
|
|
bus->busnum = busnum;
|
451 |
|
|
} else
|
452 |
|
|
warn("too many buses");
|
453 |
|
|
|
454 |
|
|
usb_bus_get(bus);
|
455 |
|
|
|
456 |
|
|
/* Add it to the list of buses */
|
457 |
|
|
list_add(&bus->bus_list, &usb_bus_list);
|
458 |
|
|
up (&usb_bus_list_lock);
|
459 |
|
|
|
460 |
|
|
usbdevfs_add_bus(bus);
|
461 |
|
|
|
462 |
|
|
info("new USB bus registered, assigned bus number %d", bus->busnum);
|
463 |
|
|
}
|
464 |
|
|
|
465 |
|
|
/**
|
466 |
|
|
* usb_deregister_bus - deregisters the USB host controller
|
467 |
|
|
* @bus: pointer to the bus to deregister
|
468 |
|
|
*
|
469 |
|
|
* (For use only by USB Host Controller Drivers.)
|
470 |
|
|
*/
|
471 |
|
|
void usb_deregister_bus(struct usb_bus *bus)
|
472 |
|
|
{
|
473 |
|
|
info("USB bus %d deregistered", bus->busnum);
|
474 |
|
|
|
475 |
|
|
/*
|
476 |
|
|
* NOTE: make sure that all the devices are removed by the
|
477 |
|
|
* controller code, as well as having it call this when cleaning
|
478 |
|
|
* itself up
|
479 |
|
|
*/
|
480 |
|
|
down (&usb_bus_list_lock);
|
481 |
|
|
list_del(&bus->bus_list);
|
482 |
|
|
clear_bit(bus->busnum, busmap.busmap);
|
483 |
|
|
up (&usb_bus_list_lock);
|
484 |
|
|
|
485 |
|
|
usbdevfs_remove_bus(bus);
|
486 |
|
|
|
487 |
|
|
usb_bus_put(bus);
|
488 |
|
|
}
|
489 |
|
|
|
490 |
|
|
/*
|
491 |
|
|
* This function is for doing a depth-first search for devices which
|
492 |
|
|
* have support, for dynamic loading of driver modules.
|
493 |
|
|
*/
|
494 |
|
|
static void usb_check_support(struct usb_device *dev)
|
495 |
|
|
{
|
496 |
|
|
int i;
|
497 |
|
|
|
498 |
|
|
if (!dev) {
|
499 |
|
|
err("null device being checked!!!");
|
500 |
|
|
return;
|
501 |
|
|
}
|
502 |
|
|
|
503 |
|
|
for (i=0; i<USB_MAXCHILDREN; i++)
|
504 |
|
|
if (dev->children[i])
|
505 |
|
|
usb_check_support(dev->children[i]);
|
506 |
|
|
|
507 |
|
|
if (!dev->actconfig)
|
508 |
|
|
return;
|
509 |
|
|
|
510 |
|
|
/* now we check this device */
|
511 |
|
|
if (dev->devnum > 0)
|
512 |
|
|
for (i = 0; i < dev->actconfig->bNumInterfaces; i++)
|
513 |
|
|
usb_find_interface_driver(dev, i);
|
514 |
|
|
}
|
515 |
|
|
|
516 |
|
|
|
517 |
|
|
/*
|
518 |
|
|
* This is intended to be used by usb device drivers that need to
|
519 |
|
|
* claim more than one interface on a device at once when probing
|
520 |
|
|
* (audio and acm are good examples). No device driver should have
|
521 |
|
|
* to mess with the internal usb_interface or usb_device structure
|
522 |
|
|
* members.
|
523 |
|
|
*/
|
524 |
|
|
void usb_driver_claim_interface(struct usb_driver *driver, struct usb_interface *iface, void* priv)
|
525 |
|
|
{
|
526 |
|
|
if (!iface || !driver)
|
527 |
|
|
return;
|
528 |
|
|
|
529 |
|
|
dbg("%s driver claimed interface %p", driver->name, iface);
|
530 |
|
|
|
531 |
|
|
iface->driver = driver;
|
532 |
|
|
iface->private_data = priv;
|
533 |
|
|
} /* usb_driver_claim_interface() */
|
534 |
|
|
|
535 |
|
|
/*
|
536 |
|
|
* This should be used by drivers to check other interfaces to see if
|
537 |
|
|
* they are available or not.
|
538 |
|
|
*/
|
539 |
|
|
int usb_interface_claimed(struct usb_interface *iface)
|
540 |
|
|
{
|
541 |
|
|
if (!iface)
|
542 |
|
|
return 0;
|
543 |
|
|
|
544 |
|
|
return (iface->driver != NULL);
|
545 |
|
|
} /* usb_interface_claimed() */
|
546 |
|
|
|
547 |
|
|
/*
|
548 |
|
|
* This should be used by drivers to release their claimed interfaces
|
549 |
|
|
*/
|
550 |
|
|
void usb_driver_release_interface(struct usb_driver *driver, struct usb_interface *iface)
|
551 |
|
|
{
|
552 |
|
|
/* this should never happen, don't release something that's not ours */
|
553 |
|
|
if (!iface || iface->driver != driver)
|
554 |
|
|
return;
|
555 |
|
|
|
556 |
|
|
iface->driver = NULL;
|
557 |
|
|
iface->private_data = NULL;
|
558 |
|
|
}
|
559 |
|
|
|
560 |
|
|
|
561 |
|
|
/**
|
562 |
|
|
* usb_match_id - find first usb_device_id matching device or interface
|
563 |
|
|
* @dev: the device whose descriptors are considered when matching
|
564 |
|
|
* @interface: the interface of interest
|
565 |
|
|
* @id: array of usb_device_id structures, terminated by zero entry
|
566 |
|
|
*
|
567 |
|
|
* usb_match_id searches an array of usb_device_id's and returns
|
568 |
|
|
* the first one matching the device or interface, or null.
|
569 |
|
|
* This is used when binding (or rebinding) a driver to an interface.
|
570 |
|
|
* Most USB device drivers will use this indirectly, through the usb core,
|
571 |
|
|
* but some layered driver frameworks use it directly.
|
572 |
|
|
* These device tables are exported with MODULE_DEVICE_TABLE, through
|
573 |
|
|
* modutils and "modules.usbmap", to support the driver loading
|
574 |
|
|
* functionality of USB hotplugging.
|
575 |
|
|
*
|
576 |
|
|
* What Matches:
|
577 |
|
|
*
|
578 |
|
|
* The "match_flags" element in a usb_device_id controls which
|
579 |
|
|
* members are used. If the corresponding bit is set, the
|
580 |
|
|
* value in the device_id must match its corresponding member
|
581 |
|
|
* in the device or interface descriptor, or else the device_id
|
582 |
|
|
* does not match.
|
583 |
|
|
*
|
584 |
|
|
* "driver_info" is normally used only by device drivers,
|
585 |
|
|
* but you can create a wildcard "matches anything" usb_device_id
|
586 |
|
|
* as a driver's "modules.usbmap" entry if you provide an id with
|
587 |
|
|
* only a nonzero "driver_info" field. If you do this, the USB device
|
588 |
|
|
* driver's probe() routine should use additional intelligence to
|
589 |
|
|
* decide whether to bind to the specified interface.
|
590 |
|
|
*
|
591 |
|
|
* What Makes Good usb_device_id Tables:
|
592 |
|
|
*
|
593 |
|
|
* The match algorithm is very simple, so that intelligence in
|
594 |
|
|
* driver selection must come from smart driver id records.
|
595 |
|
|
* Unless you have good reasons to use another selection policy,
|
596 |
|
|
* provide match elements only in related groups, and order match
|
597 |
|
|
* specifiers from specific to general. Use the macros provided
|
598 |
|
|
* for that purpose if you can.
|
599 |
|
|
*
|
600 |
|
|
* The most specific match specifiers use device descriptor
|
601 |
|
|
* data. These are commonly used with product-specific matches;
|
602 |
|
|
* the USB_DEVICE macro lets you provide vendor and product IDs,
|
603 |
|
|
* and you can also match against ranges of product revisions.
|
604 |
|
|
* These are widely used for devices with application or vendor
|
605 |
|
|
* specific bDeviceClass values.
|
606 |
|
|
*
|
607 |
|
|
* Matches based on device class/subclass/protocol specifications
|
608 |
|
|
* are slightly more general; use the USB_DEVICE_INFO macro, or
|
609 |
|
|
* its siblings. These are used with single-function devices
|
610 |
|
|
* where bDeviceClass doesn't specify that each interface has
|
611 |
|
|
* its own class.
|
612 |
|
|
*
|
613 |
|
|
* Matches based on interface class/subclass/protocol are the
|
614 |
|
|
* most general; they let drivers bind to any interface on a
|
615 |
|
|
* multiple-function device. Use the USB_INTERFACE_INFO
|
616 |
|
|
* macro, or its siblings, to match class-per-interface style
|
617 |
|
|
* devices (as recorded in bDeviceClass).
|
618 |
|
|
*
|
619 |
|
|
* Within those groups, remember that not all combinations are
|
620 |
|
|
* meaningful. For example, don't give a product version range
|
621 |
|
|
* without vendor and product IDs; or specify a protocol without
|
622 |
|
|
* its associated class and subclass.
|
623 |
|
|
*/
|
624 |
|
|
const struct usb_device_id *
|
625 |
|
|
usb_match_id(struct usb_device *dev, struct usb_interface *interface,
|
626 |
|
|
const struct usb_device_id *id)
|
627 |
|
|
{
|
628 |
|
|
struct usb_interface_descriptor *intf = 0;
|
629 |
|
|
|
630 |
|
|
/* proc_connectinfo in devio.c may call us with id == NULL. */
|
631 |
|
|
if (id == NULL)
|
632 |
|
|
return NULL;
|
633 |
|
|
|
634 |
|
|
/* It is important to check that id->driver_info is nonzero,
|
635 |
|
|
since an entry that is all zeroes except for a nonzero
|
636 |
|
|
id->driver_info is the way to create an entry that
|
637 |
|
|
indicates that the driver want to examine every
|
638 |
|
|
device and interface. */
|
639 |
|
|
for (; id->idVendor || id->bDeviceClass || id->bInterfaceClass ||
|
640 |
|
|
id->driver_info; id++) {
|
641 |
|
|
|
642 |
|
|
if ((id->match_flags & USB_DEVICE_ID_MATCH_VENDOR) &&
|
643 |
|
|
id->idVendor != dev->descriptor.idVendor)
|
644 |
|
|
continue;
|
645 |
|
|
|
646 |
|
|
if ((id->match_flags & USB_DEVICE_ID_MATCH_PRODUCT) &&
|
647 |
|
|
id->idProduct != dev->descriptor.idProduct)
|
648 |
|
|
continue;
|
649 |
|
|
|
650 |
|
|
/* No need to test id->bcdDevice_lo != 0, since 0 is never
|
651 |
|
|
greater than any unsigned number. */
|
652 |
|
|
if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_LO) &&
|
653 |
|
|
(id->bcdDevice_lo > dev->descriptor.bcdDevice))
|
654 |
|
|
continue;
|
655 |
|
|
|
656 |
|
|
if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_HI) &&
|
657 |
|
|
(id->bcdDevice_hi < dev->descriptor.bcdDevice))
|
658 |
|
|
continue;
|
659 |
|
|
|
660 |
|
|
if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_CLASS) &&
|
661 |
|
|
(id->bDeviceClass != dev->descriptor.bDeviceClass))
|
662 |
|
|
continue;
|
663 |
|
|
|
664 |
|
|
if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_SUBCLASS) &&
|
665 |
|
|
(id->bDeviceSubClass!= dev->descriptor.bDeviceSubClass))
|
666 |
|
|
continue;
|
667 |
|
|
|
668 |
|
|
if ((id->match_flags & USB_DEVICE_ID_MATCH_DEV_PROTOCOL) &&
|
669 |
|
|
(id->bDeviceProtocol != dev->descriptor.bDeviceProtocol))
|
670 |
|
|
continue;
|
671 |
|
|
|
672 |
|
|
intf = &interface->altsetting [interface->act_altsetting];
|
673 |
|
|
|
674 |
|
|
if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_CLASS) &&
|
675 |
|
|
(id->bInterfaceClass != intf->bInterfaceClass))
|
676 |
|
|
continue;
|
677 |
|
|
|
678 |
|
|
if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_SUBCLASS) &&
|
679 |
|
|
(id->bInterfaceSubClass != intf->bInterfaceSubClass))
|
680 |
|
|
continue;
|
681 |
|
|
|
682 |
|
|
if ((id->match_flags & USB_DEVICE_ID_MATCH_INT_PROTOCOL) &&
|
683 |
|
|
(id->bInterfaceProtocol != intf->bInterfaceProtocol))
|
684 |
|
|
continue;
|
685 |
|
|
|
686 |
|
|
return id;
|
687 |
|
|
}
|
688 |
|
|
|
689 |
|
|
return NULL;
|
690 |
|
|
}
|
691 |
|
|
|
692 |
|
|
/*
|
693 |
|
|
* This entrypoint gets called for each new device.
|
694 |
|
|
*
|
695 |
|
|
* We now walk the list of registered USB drivers,
|
696 |
|
|
* looking for one that will accept this interface.
|
697 |
|
|
*
|
698 |
|
|
* "New Style" drivers use a table describing the devices and interfaces
|
699 |
|
|
* they handle. Those tables are available to user mode tools deciding
|
700 |
|
|
* whether to load driver modules for a new device.
|
701 |
|
|
*
|
702 |
|
|
* The probe return value is changed to be a private pointer. This way
|
703 |
|
|
* the drivers don't have to dig around in our structures to set the
|
704 |
|
|
* private pointer if they only need one interface.
|
705 |
|
|
*
|
706 |
|
|
* Returns: 0 if a driver accepted the interface, -1 otherwise
|
707 |
|
|
*/
|
708 |
|
|
static int usb_find_interface_driver(struct usb_device *dev, unsigned ifnum)
|
709 |
|
|
{
|
710 |
|
|
struct list_head *tmp;
|
711 |
|
|
struct usb_interface *interface;
|
712 |
|
|
void *private;
|
713 |
|
|
const struct usb_device_id *id;
|
714 |
|
|
struct usb_driver *driver;
|
715 |
|
|
int i;
|
716 |
|
|
|
717 |
|
|
if ((!dev) || (ifnum >= dev->actconfig->bNumInterfaces)) {
|
718 |
|
|
err("bad find_interface_driver params");
|
719 |
|
|
return -1;
|
720 |
|
|
}
|
721 |
|
|
|
722 |
|
|
down(&dev->serialize);
|
723 |
|
|
|
724 |
|
|
interface = dev->actconfig->interface + ifnum;
|
725 |
|
|
|
726 |
|
|
if (usb_interface_claimed(interface))
|
727 |
|
|
goto out_err;
|
728 |
|
|
|
729 |
|
|
private = NULL;
|
730 |
|
|
for (tmp = usb_driver_list.next; tmp != &usb_driver_list;) {
|
731 |
|
|
driver = list_entry(tmp, struct usb_driver, driver_list);
|
732 |
|
|
tmp = tmp->next;
|
733 |
|
|
|
734 |
|
|
id = driver->id_table;
|
735 |
|
|
/* new style driver? */
|
736 |
|
|
if (id) {
|
737 |
|
|
for (i = 0; i < interface->num_altsetting; i++) {
|
738 |
|
|
interface->act_altsetting = i;
|
739 |
|
|
id = usb_match_id(dev, interface, id);
|
740 |
|
|
if (id) {
|
741 |
|
|
down(&driver->serialize);
|
742 |
|
|
private = driver->probe(dev,ifnum,id);
|
743 |
|
|
up(&driver->serialize);
|
744 |
|
|
if (private != NULL)
|
745 |
|
|
break;
|
746 |
|
|
}
|
747 |
|
|
}
|
748 |
|
|
|
749 |
|
|
/* if driver not bound, leave defaults unchanged */
|
750 |
|
|
if (private == NULL)
|
751 |
|
|
interface->act_altsetting = 0;
|
752 |
|
|
} else { /* "old style" driver */
|
753 |
|
|
down(&driver->serialize);
|
754 |
|
|
private = driver->probe(dev, ifnum, NULL);
|
755 |
|
|
up(&driver->serialize);
|
756 |
|
|
}
|
757 |
|
|
|
758 |
|
|
/* probe() may have changed the config on us */
|
759 |
|
|
interface = dev->actconfig->interface + ifnum;
|
760 |
|
|
|
761 |
|
|
if (private) {
|
762 |
|
|
usb_driver_claim_interface(driver, interface, private);
|
763 |
|
|
up(&dev->serialize);
|
764 |
|
|
return 0;
|
765 |
|
|
}
|
766 |
|
|
}
|
767 |
|
|
|
768 |
|
|
out_err:
|
769 |
|
|
up(&dev->serialize);
|
770 |
|
|
return -1;
|
771 |
|
|
}
|
772 |
|
|
|
773 |
|
|
/*
|
774 |
|
|
* This simply converts the interface _number_ (as in interface.bInterfaceNumber) and
|
775 |
|
|
* converts it to the interface _position_ (as in dev->actconfig->interface + position)
|
776 |
|
|
* and calls usb_find_interface_driver().
|
777 |
|
|
*
|
778 |
|
|
* Note that the number is the same as the position for all interfaces _except_
|
779 |
|
|
* devices with interfaces not sequentially numbered (e.g., 0, 2, 3, etc).
|
780 |
|
|
*/
|
781 |
|
|
int usb_find_interface_driver_for_ifnum(struct usb_device *dev, unsigned ifnum)
|
782 |
|
|
{
|
783 |
|
|
int ifpos = usb_ifnum_to_ifpos(dev, ifnum);
|
784 |
|
|
|
785 |
|
|
if (0 > ifpos)
|
786 |
|
|
return -EINVAL;
|
787 |
|
|
|
788 |
|
|
return usb_find_interface_driver(dev, ifpos);
|
789 |
|
|
}
|
790 |
|
|
|
791 |
|
|
#ifdef CONFIG_HOTPLUG
|
792 |
|
|
|
793 |
|
|
/*
|
794 |
|
|
* USB hotplugging invokes what /proc/sys/kernel/hotplug says
|
795 |
|
|
* (normally /sbin/hotplug) when USB devices get added or removed.
|
796 |
|
|
*
|
797 |
|
|
* This invokes a user mode policy agent, typically helping to load driver
|
798 |
|
|
* or other modules, configure the device, and more. Drivers can provide
|
799 |
|
|
* a MODULE_DEVICE_TABLE to help with module loading subtasks.
|
800 |
|
|
*
|
801 |
|
|
* Some synchronization is important: removes can't start processing
|
802 |
|
|
* before the add-device processing completes, and vice versa. That keeps
|
803 |
|
|
* a stack of USB-related identifiers stable while they're in use. If we
|
804 |
|
|
* know that agents won't complete after they return (such as by forking
|
805 |
|
|
* a process that completes later), it's enough to just waitpid() for the
|
806 |
|
|
* agent -- as is currently done.
|
807 |
|
|
*
|
808 |
|
|
* The reason: we know we're called either from khubd (the typical case)
|
809 |
|
|
* or from root hub initialization (init, kapmd, modprobe, etc). In both
|
810 |
|
|
* cases, we know no other thread can recycle our address, since we must
|
811 |
|
|
* already have been serialized enough to prevent that.
|
812 |
|
|
*/
|
813 |
|
|
static void call_policy_interface (char *verb, struct usb_device *dev, int interface)
|
814 |
|
|
{
|
815 |
|
|
char *argv [3], **envp, *buf, *scratch;
|
816 |
|
|
int i = 0, value;
|
817 |
|
|
|
818 |
|
|
if (!hotplug_path [0])
|
819 |
|
|
return;
|
820 |
|
|
if (in_interrupt ()) {
|
821 |
|
|
dbg ("In_interrupt");
|
822 |
|
|
return;
|
823 |
|
|
}
|
824 |
|
|
if (!current->fs->root) {
|
825 |
|
|
/* statically linked USB is initted rather early */
|
826 |
|
|
dbg ("call_policy %s, num %d -- no FS yet", verb, dev->devnum);
|
827 |
|
|
return;
|
828 |
|
|
}
|
829 |
|
|
if (dev->devnum < 0) {
|
830 |
|
|
dbg ("device already deleted ??");
|
831 |
|
|
return;
|
832 |
|
|
}
|
833 |
|
|
if (!(envp = (char **) kmalloc (20 * sizeof (char *), GFP_KERNEL))) {
|
834 |
|
|
dbg ("enomem");
|
835 |
|
|
return;
|
836 |
|
|
}
|
837 |
|
|
if (!(buf = kmalloc (256, GFP_KERNEL))) {
|
838 |
|
|
kfree (envp);
|
839 |
|
|
dbg ("enomem2");
|
840 |
|
|
return;
|
841 |
|
|
}
|
842 |
|
|
|
843 |
|
|
/* only one standardized param to hotplug command: type */
|
844 |
|
|
argv [0] = hotplug_path;
|
845 |
|
|
argv [1] = "usb";
|
846 |
|
|
argv [2] = 0;
|
847 |
|
|
|
848 |
|
|
/* minimal command environment */
|
849 |
|
|
envp [i++] = "HOME=/";
|
850 |
|
|
envp [i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
|
851 |
|
|
|
852 |
|
|
#ifdef DEBUG
|
853 |
|
|
/* hint that policy agent should enter no-stdout debug mode */
|
854 |
|
|
envp [i++] = "DEBUG=kernel";
|
855 |
|
|
#endif
|
856 |
|
|
/* extensible set of named bus-specific parameters,
|
857 |
|
|
* supporting multiple driver selection algorithms.
|
858 |
|
|
*/
|
859 |
|
|
scratch = buf;
|
860 |
|
|
|
861 |
|
|
/* action: add, remove */
|
862 |
|
|
envp [i++] = scratch;
|
863 |
|
|
scratch += sprintf (scratch, "ACTION=%s", verb) + 1;
|
864 |
|
|
|
865 |
|
|
#ifdef CONFIG_USB_DEVICEFS
|
866 |
|
|
/* If this is available, userspace programs can directly read
|
867 |
|
|
* all the device descriptors we don't tell them about. Or
|
868 |
|
|
* even act as usermode drivers.
|
869 |
|
|
*
|
870 |
|
|
* FIXME reduce hardwired intelligence here
|
871 |
|
|
*/
|
872 |
|
|
envp [i++] = "DEVFS=/proc/bus/usb";
|
873 |
|
|
envp [i++] = scratch;
|
874 |
|
|
scratch += sprintf (scratch, "DEVICE=/proc/bus/usb/%03d/%03d",
|
875 |
|
|
dev->bus->busnum, dev->devnum) + 1;
|
876 |
|
|
#endif
|
877 |
|
|
|
878 |
|
|
/* per-device configuration hacks are common */
|
879 |
|
|
envp [i++] = scratch;
|
880 |
|
|
scratch += sprintf (scratch, "PRODUCT=%x/%x/%x",
|
881 |
|
|
dev->descriptor.idVendor,
|
882 |
|
|
dev->descriptor.idProduct,
|
883 |
|
|
dev->descriptor.bcdDevice) + 1;
|
884 |
|
|
|
885 |
|
|
/* class-based driver binding models */
|
886 |
|
|
envp [i++] = scratch;
|
887 |
|
|
scratch += sprintf (scratch, "TYPE=%d/%d/%d",
|
888 |
|
|
dev->descriptor.bDeviceClass,
|
889 |
|
|
dev->descriptor.bDeviceSubClass,
|
890 |
|
|
dev->descriptor.bDeviceProtocol) + 1;
|
891 |
|
|
if (dev->descriptor.bDeviceClass == 0) {
|
892 |
|
|
int alt = dev->actconfig->interface [interface].act_altsetting;
|
893 |
|
|
|
894 |
|
|
envp [i++] = scratch;
|
895 |
|
|
scratch += sprintf (scratch, "INTERFACE=%d/%d/%d",
|
896 |
|
|
dev->actconfig->interface [interface].altsetting [alt].bInterfaceClass,
|
897 |
|
|
dev->actconfig->interface [interface].altsetting [alt].bInterfaceSubClass,
|
898 |
|
|
dev->actconfig->interface [interface].altsetting [alt].bInterfaceProtocol)
|
899 |
|
|
+ 1;
|
900 |
|
|
}
|
901 |
|
|
envp [i++] = 0;
|
902 |
|
|
/* assert: (scratch - buf) < sizeof buf */
|
903 |
|
|
|
904 |
|
|
/* NOTE: user mode daemons can call the agents too */
|
905 |
|
|
|
906 |
|
|
dbg ("kusbd: %s %s %d", argv [0], verb, dev->devnum);
|
907 |
|
|
value = call_usermodehelper (argv [0], argv, envp);
|
908 |
|
|
kfree (buf);
|
909 |
|
|
kfree (envp);
|
910 |
|
|
if (value != 0)
|
911 |
|
|
dbg ("kusbd policy returned 0x%x", value);
|
912 |
|
|
}
|
913 |
|
|
|
914 |
|
|
static void call_policy (char *verb, struct usb_device *dev)
|
915 |
|
|
{
|
916 |
|
|
int i;
|
917 |
|
|
for (i = 0; i < dev->actconfig->bNumInterfaces; i++) {
|
918 |
|
|
call_policy_interface (verb, dev, i);
|
919 |
|
|
}
|
920 |
|
|
}
|
921 |
|
|
|
922 |
|
|
#else
|
923 |
|
|
|
924 |
|
|
static inline void
|
925 |
|
|
call_policy (char *verb, struct usb_device *dev)
|
926 |
|
|
{ }
|
927 |
|
|
|
928 |
|
|
#endif /* CONFIG_HOTPLUG */
|
929 |
|
|
|
930 |
|
|
|
931 |
|
|
/*
|
932 |
|
|
* This entrypoint gets called for each new device.
|
933 |
|
|
*
|
934 |
|
|
* All interfaces are scanned for matching drivers.
|
935 |
|
|
*/
|
936 |
|
|
static void usb_find_drivers(struct usb_device *dev)
|
937 |
|
|
{
|
938 |
|
|
unsigned ifnum;
|
939 |
|
|
unsigned rejected = 0;
|
940 |
|
|
unsigned claimed = 0;
|
941 |
|
|
|
942 |
|
|
for (ifnum = 0; ifnum < dev->actconfig->bNumInterfaces; ifnum++) {
|
943 |
|
|
/* if this interface hasn't already been claimed */
|
944 |
|
|
if (!usb_interface_claimed(dev->actconfig->interface + ifnum)) {
|
945 |
|
|
if (usb_find_interface_driver(dev, ifnum))
|
946 |
|
|
rejected++;
|
947 |
|
|
else
|
948 |
|
|
claimed++;
|
949 |
|
|
}
|
950 |
|
|
}
|
951 |
|
|
|
952 |
|
|
if (rejected)
|
953 |
|
|
dbg("unhandled interfaces on device");
|
954 |
|
|
|
955 |
|
|
if (!claimed) {
|
956 |
|
|
warn("USB device %d (vend/prod 0x%x/0x%x) is not claimed by any active driver.",
|
957 |
|
|
dev->devnum,
|
958 |
|
|
dev->descriptor.idVendor,
|
959 |
|
|
dev->descriptor.idProduct);
|
960 |
|
|
#ifdef DEBUG
|
961 |
|
|
usb_show_device(dev);
|
962 |
|
|
#endif
|
963 |
|
|
}
|
964 |
|
|
}
|
965 |
|
|
|
966 |
|
|
/*
|
967 |
|
|
* Only HC's should call usb_alloc_dev and usb_free_dev directly
|
968 |
|
|
* Anybody may use usb_inc_dev_use or usb_dec_dev_use
|
969 |
|
|
*/
|
970 |
|
|
struct usb_device *usb_alloc_dev(struct usb_device *parent, struct usb_bus *bus)
|
971 |
|
|
{
|
972 |
|
|
struct usb_device *dev;
|
973 |
|
|
|
974 |
|
|
dev = kmalloc(sizeof(*dev), GFP_KERNEL);
|
975 |
|
|
if (!dev)
|
976 |
|
|
return NULL;
|
977 |
|
|
|
978 |
|
|
memset(dev, 0, sizeof(*dev));
|
979 |
|
|
|
980 |
|
|
usb_bus_get(bus);
|
981 |
|
|
|
982 |
|
|
if (!parent)
|
983 |
|
|
dev->devpath [0] = '0';
|
984 |
|
|
|
985 |
|
|
dev->bus = bus;
|
986 |
|
|
dev->parent = parent;
|
987 |
|
|
atomic_set(&dev->refcnt, 1);
|
988 |
|
|
INIT_LIST_HEAD(&dev->inodes);
|
989 |
|
|
INIT_LIST_HEAD(&dev->filelist);
|
990 |
|
|
|
991 |
|
|
init_MUTEX(&dev->serialize);
|
992 |
|
|
|
993 |
|
|
dev->bus->op->allocate(dev);
|
994 |
|
|
|
995 |
|
|
return dev;
|
996 |
|
|
}
|
997 |
|
|
|
998 |
|
|
void usb_free_dev(struct usb_device *dev)
|
999 |
|
|
{
|
1000 |
|
|
if (atomic_dec_and_test(&dev->refcnt)) {
|
1001 |
|
|
dev->bus->op->deallocate(dev);
|
1002 |
|
|
usb_destroy_configuration(dev);
|
1003 |
|
|
|
1004 |
|
|
usb_bus_put(dev->bus);
|
1005 |
|
|
|
1006 |
|
|
kfree(dev);
|
1007 |
|
|
}
|
1008 |
|
|
}
|
1009 |
|
|
|
1010 |
|
|
void usb_inc_dev_use(struct usb_device *dev)
|
1011 |
|
|
{
|
1012 |
|
|
atomic_inc(&dev->refcnt);
|
1013 |
|
|
}
|
1014 |
|
|
|
1015 |
|
|
/* -------------------------------------------------------------------------------------
|
1016 |
|
|
* New USB Core Functions
|
1017 |
|
|
* -------------------------------------------------------------------------------------*/
|
1018 |
|
|
|
1019 |
|
|
/**
|
1020 |
|
|
* usb_alloc_urb - creates a new urb for a USB driver to use
|
1021 |
|
|
* @iso_packets: number of iso packets for this urb
|
1022 |
|
|
*
|
1023 |
|
|
* Creates an urb for the USB driver to use and returns a pointer to it.
|
1024 |
|
|
* If no memory is available, NULL is returned.
|
1025 |
|
|
*
|
1026 |
|
|
* If the driver want to use this urb for interrupt, control, or bulk
|
1027 |
|
|
* endpoints, pass '0' as the number of iso packets.
|
1028 |
|
|
*
|
1029 |
|
|
* The driver should call usb_free_urb() when it is finished with the urb.
|
1030 |
|
|
*/
|
1031 |
|
|
struct urb *usb_alloc_urb(int iso_packets)
|
1032 |
|
|
{
|
1033 |
|
|
struct urb *urb;
|
1034 |
|
|
|
1035 |
|
|
urb = (struct urb *)kmalloc(sizeof(struct urb) + iso_packets * sizeof(struct iso_packet_descriptor),
|
1036 |
|
|
/* pessimize to prevent deadlocks */ GFP_ATOMIC);
|
1037 |
|
|
if (!urb) {
|
1038 |
|
|
err("alloc_urb: kmalloc failed");
|
1039 |
|
|
return NULL;
|
1040 |
|
|
}
|
1041 |
|
|
|
1042 |
|
|
memset(urb, 0, sizeof(*urb));
|
1043 |
|
|
|
1044 |
|
|
spin_lock_init(&urb->lock);
|
1045 |
|
|
|
1046 |
|
|
return urb;
|
1047 |
|
|
}
|
1048 |
|
|
|
1049 |
|
|
/**
|
1050 |
|
|
* usb_free_urb - frees the memory used by a urb
|
1051 |
|
|
* @urb: pointer to the urb to free
|
1052 |
|
|
*
|
1053 |
|
|
* If an urb is created with a call to usb_create_urb() it should be
|
1054 |
|
|
* cleaned up with a call to usb_free_urb() when the driver is finished
|
1055 |
|
|
* with it.
|
1056 |
|
|
*/
|
1057 |
|
|
void usb_free_urb(struct urb* urb)
|
1058 |
|
|
{
|
1059 |
|
|
if (urb)
|
1060 |
|
|
kfree(urb);
|
1061 |
|
|
}
|
1062 |
|
|
/*-------------------------------------------------------------------*/
|
1063 |
|
|
int usb_submit_urb(struct urb *urb)
|
1064 |
|
|
{
|
1065 |
|
|
if (urb && urb->dev && urb->dev->bus && urb->dev->bus->op)
|
1066 |
|
|
return urb->dev->bus->op->submit_urb(urb);
|
1067 |
|
|
else
|
1068 |
|
|
return -ENODEV;
|
1069 |
|
|
}
|
1070 |
|
|
|
1071 |
|
|
/*-------------------------------------------------------------------*/
|
1072 |
|
|
int usb_unlink_urb(struct urb *urb)
|
1073 |
|
|
{
|
1074 |
|
|
if (urb && urb->dev && urb->dev->bus && urb->dev->bus->op)
|
1075 |
|
|
return urb->dev->bus->op->unlink_urb(urb);
|
1076 |
|
|
else
|
1077 |
|
|
return -ENODEV;
|
1078 |
|
|
}
|
1079 |
|
|
/*-------------------------------------------------------------------*
|
1080 |
|
|
* COMPLETION HANDLERS *
|
1081 |
|
|
*-------------------------------------------------------------------*/
|
1082 |
|
|
|
1083 |
|
|
/*-------------------------------------------------------------------*
|
1084 |
|
|
* completion handler for compatibility wrappers (sync control/bulk) *
|
1085 |
|
|
*-------------------------------------------------------------------*/
|
1086 |
|
|
static void usb_api_blocking_completion(struct urb *urb)
|
1087 |
|
|
{
|
1088 |
|
|
struct usb_api_data *awd = (struct usb_api_data *)urb->context;
|
1089 |
|
|
|
1090 |
|
|
awd->done = 1;
|
1091 |
|
|
wmb();
|
1092 |
|
|
wake_up(&awd->wqh);
|
1093 |
|
|
}
|
1094 |
|
|
|
1095 |
|
|
/*-------------------------------------------------------------------*
|
1096 |
|
|
* COMPATIBILITY STUFF *
|
1097 |
|
|
*-------------------------------------------------------------------*/
|
1098 |
|
|
|
1099 |
|
|
// Starts urb and waits for completion or timeout
|
1100 |
|
|
static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
|
1101 |
|
|
{
|
1102 |
|
|
DECLARE_WAITQUEUE(wait, current);
|
1103 |
|
|
struct usb_api_data awd;
|
1104 |
|
|
int status;
|
1105 |
|
|
|
1106 |
|
|
init_waitqueue_head(&awd.wqh);
|
1107 |
|
|
awd.done = 0;
|
1108 |
|
|
|
1109 |
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
1110 |
|
|
add_wait_queue(&awd.wqh, &wait);
|
1111 |
|
|
|
1112 |
|
|
urb->context = &awd;
|
1113 |
|
|
status = usb_submit_urb(urb);
|
1114 |
|
|
if (status) {
|
1115 |
|
|
// something went wrong
|
1116 |
|
|
usb_free_urb(urb);
|
1117 |
|
|
set_current_state(TASK_RUNNING);
|
1118 |
|
|
remove_wait_queue(&awd.wqh, &wait);
|
1119 |
|
|
return status;
|
1120 |
|
|
}
|
1121 |
|
|
|
1122 |
|
|
while (timeout && !awd.done)
|
1123 |
|
|
{
|
1124 |
|
|
timeout = schedule_timeout(timeout);
|
1125 |
|
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
1126 |
|
|
rmb();
|
1127 |
|
|
}
|
1128 |
|
|
|
1129 |
|
|
set_current_state(TASK_RUNNING);
|
1130 |
|
|
remove_wait_queue(&awd.wqh, &wait);
|
1131 |
|
|
|
1132 |
|
|
if (!timeout && !awd.done) {
|
1133 |
|
|
if (urb->status != -EINPROGRESS) { /* No callback?!! */
|
1134 |
|
|
printk(KERN_ERR "usb: raced timeout, "
|
1135 |
|
|
"pipe 0x%x status %d time left %d\n",
|
1136 |
|
|
urb->pipe, urb->status, timeout);
|
1137 |
|
|
status = urb->status;
|
1138 |
|
|
} else {
|
1139 |
|
|
printk("usb_control/bulk_msg: timeout\n");
|
1140 |
|
|
usb_unlink_urb(urb); // remove urb safely
|
1141 |
|
|
status = -ETIMEDOUT;
|
1142 |
|
|
}
|
1143 |
|
|
} else
|
1144 |
|
|
status = urb->status;
|
1145 |
|
|
|
1146 |
|
|
if (actual_length)
|
1147 |
|
|
*actual_length = urb->actual_length;
|
1148 |
|
|
|
1149 |
|
|
usb_free_urb(urb);
|
1150 |
|
|
return status;
|
1151 |
|
|
}
|
1152 |
|
|
|
1153 |
|
|
/*-------------------------------------------------------------------*/
|
1154 |
|
|
// returns status (negative) or length (positive)
|
1155 |
|
|
int usb_internal_control_msg(struct usb_device *usb_dev, unsigned int pipe,
|
1156 |
|
|
struct usb_ctrlrequest *cmd, void *data, int len, int timeout)
|
1157 |
|
|
{
|
1158 |
|
|
struct urb *urb;
|
1159 |
|
|
int retv;
|
1160 |
|
|
int length;
|
1161 |
|
|
|
1162 |
|
|
urb = usb_alloc_urb(0);
|
1163 |
|
|
if (!urb)
|
1164 |
|
|
return -ENOMEM;
|
1165 |
|
|
|
1166 |
|
|
FILL_CONTROL_URB(urb, usb_dev, pipe, (unsigned char*)cmd, data, len,
|
1167 |
|
|
usb_api_blocking_completion, 0);
|
1168 |
|
|
|
1169 |
|
|
retv = usb_start_wait_urb(urb, timeout, &length);
|
1170 |
|
|
if (retv < 0)
|
1171 |
|
|
return retv;
|
1172 |
|
|
else
|
1173 |
|
|
return length;
|
1174 |
|
|
}
|
1175 |
|
|
|
1176 |
|
|
/**
|
1177 |
|
|
* usb_control_msg - Builds a control urb, sends it off and waits for completion
|
1178 |
|
|
* @dev: pointer to the usb device to send the message to
|
1179 |
|
|
* @pipe: endpoint "pipe" to send the message to
|
1180 |
|
|
* @request: USB message request value
|
1181 |
|
|
* @requesttype: USB message request type value
|
1182 |
|
|
* @value: USB message value
|
1183 |
|
|
* @index: USB message index value
|
1184 |
|
|
* @data: pointer to the data to send
|
1185 |
|
|
* @size: length in bytes of the data to send
|
1186 |
|
|
* @timeout: time to wait for the message to complete before timing out (if 0 the wait is forever)
|
1187 |
|
|
*
|
1188 |
|
|
* This function sends a simple control message to a specified endpoint
|
1189 |
|
|
* and waits for the message to complete, or timeout.
|
1190 |
|
|
*
|
1191 |
|
|
* If successful, it returns the number of bytes transferred;
|
1192 |
|
|
* otherwise, it returns a negative error number.
|
1193 |
|
|
*
|
1194 |
|
|
* Don't use this function from within an interrupt context, like a
|
1195 |
|
|
* bottom half handler. If you need a asyncronous message, or need to send
|
1196 |
|
|
* a message from within interrupt context, use usb_submit_urb()
|
1197 |
|
|
*/
|
1198 |
|
|
int usb_control_msg(struct usb_device *dev, unsigned int pipe, __u8 request, __u8 requesttype,
|
1199 |
|
|
__u16 value, __u16 index, void *data, __u16 size, int timeout)
|
1200 |
|
|
{
|
1201 |
|
|
struct usb_ctrlrequest *dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_NOIO);
|
1202 |
|
|
int ret;
|
1203 |
|
|
|
1204 |
|
|
if (!dr)
|
1205 |
|
|
return -ENOMEM;
|
1206 |
|
|
|
1207 |
|
|
dr->bRequestType = requesttype;
|
1208 |
|
|
dr->bRequest = request;
|
1209 |
|
|
dr->wValue = cpu_to_le16p(&value);
|
1210 |
|
|
dr->wIndex = cpu_to_le16p(&index);
|
1211 |
|
|
dr->wLength = cpu_to_le16p(&size);
|
1212 |
|
|
|
1213 |
|
|
//dbg("usb_control_msg");
|
1214 |
|
|
|
1215 |
|
|
ret = usb_internal_control_msg(dev, pipe, dr, data, size, timeout);
|
1216 |
|
|
|
1217 |
|
|
kfree(dr);
|
1218 |
|
|
|
1219 |
|
|
return ret;
|
1220 |
|
|
}
|
1221 |
|
|
|
1222 |
|
|
|
1223 |
|
|
/**
|
1224 |
|
|
* usb_bulk_msg - Builds a bulk urb, sends it off and waits for completion
|
1225 |
|
|
* @usb_dev: pointer to the usb device to send the message to
|
1226 |
|
|
* @pipe: endpoint "pipe" to send the message to
|
1227 |
|
|
* @data: pointer to the data to send
|
1228 |
|
|
* @len: length in bytes of the data to send
|
1229 |
|
|
* @actual_length: pointer to a location to put the actual length transferred in bytes
|
1230 |
|
|
* @timeout: time to wait for the message to complete before timing out (if 0 the wait is forever)
|
1231 |
|
|
*
|
1232 |
|
|
* This function sends a simple bulk message to a specified endpoint
|
1233 |
|
|
* and waits for the message to complete, or timeout.
|
1234 |
|
|
*
|
1235 |
|
|
* If successful, it returns 0, otherwise a negative error number.
|
1236 |
|
|
* The number of actual bytes transferred will be stored in the
|
1237 |
|
|
* actual_length paramater.
|
1238 |
|
|
*
|
1239 |
|
|
* Don't use this function from within an interrupt context, like a
|
1240 |
|
|
* bottom half handler. If you need a asyncronous message, or need to
|
1241 |
|
|
* send a message from within interrupt context, use usb_submit_urb()
|
1242 |
|
|
*/
|
1243 |
|
|
int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe,
|
1244 |
|
|
void *data, int len, int *actual_length, int timeout)
|
1245 |
|
|
{
|
1246 |
|
|
struct urb *urb;
|
1247 |
|
|
|
1248 |
|
|
if (len < 0)
|
1249 |
|
|
return -EINVAL;
|
1250 |
|
|
|
1251 |
|
|
urb=usb_alloc_urb(0);
|
1252 |
|
|
if (!urb)
|
1253 |
|
|
return -ENOMEM;
|
1254 |
|
|
|
1255 |
|
|
FILL_BULK_URB(urb, usb_dev, pipe, data, len,
|
1256 |
|
|
usb_api_blocking_completion, 0);
|
1257 |
|
|
|
1258 |
|
|
return usb_start_wait_urb(urb,timeout,actual_length);
|
1259 |
|
|
}
|
1260 |
|
|
|
1261 |
|
|
/*
|
1262 |
|
|
* usb_get_current_frame_number()
|
1263 |
|
|
*
|
1264 |
|
|
* returns the current frame number for the parent USB bus/controller
|
1265 |
|
|
* of the given USB device.
|
1266 |
|
|
*/
|
1267 |
|
|
int usb_get_current_frame_number(struct usb_device *usb_dev)
|
1268 |
|
|
{
|
1269 |
|
|
return usb_dev->bus->op->get_frame_number (usb_dev);
|
1270 |
|
|
}
|
1271 |
|
|
/*-------------------------------------------------------------------*/
|
1272 |
|
|
|
1273 |
|
|
static int usb_parse_endpoint(struct usb_endpoint_descriptor *endpoint, unsigned char *buffer, int size)
|
1274 |
|
|
{
|
1275 |
|
|
struct usb_descriptor_header *header;
|
1276 |
|
|
unsigned char *begin;
|
1277 |
|
|
int parsed = 0, len, numskipped;
|
1278 |
|
|
|
1279 |
|
|
header = (struct usb_descriptor_header *)buffer;
|
1280 |
|
|
|
1281 |
|
|
/* Everything should be fine being passed into here, but we sanity */
|
1282 |
|
|
/* check JIC */
|
1283 |
|
|
if (header->bLength > size) {
|
1284 |
|
|
err("ran out of descriptors parsing");
|
1285 |
|
|
return -1;
|
1286 |
|
|
}
|
1287 |
|
|
|
1288 |
|
|
if (header->bDescriptorType != USB_DT_ENDPOINT) {
|
1289 |
|
|
warn("unexpected descriptor 0x%X, expecting endpoint descriptor, type 0x%X",
|
1290 |
|
|
endpoint->bDescriptorType, USB_DT_ENDPOINT);
|
1291 |
|
|
return parsed;
|
1292 |
|
|
}
|
1293 |
|
|
|
1294 |
|
|
if (header->bLength == USB_DT_ENDPOINT_AUDIO_SIZE)
|
1295 |
|
|
memcpy(endpoint, buffer, USB_DT_ENDPOINT_AUDIO_SIZE);
|
1296 |
|
|
else
|
1297 |
|
|
memcpy(endpoint, buffer, USB_DT_ENDPOINT_SIZE);
|
1298 |
|
|
|
1299 |
|
|
le16_to_cpus(&endpoint->wMaxPacketSize);
|
1300 |
|
|
|
1301 |
|
|
buffer += header->bLength;
|
1302 |
|
|
size -= header->bLength;
|
1303 |
|
|
parsed += header->bLength;
|
1304 |
|
|
|
1305 |
|
|
/* Skip over the rest of the Class Specific or Vendor Specific */
|
1306 |
|
|
/* descriptors */
|
1307 |
|
|
begin = buffer;
|
1308 |
|
|
numskipped = 0;
|
1309 |
|
|
while (size >= sizeof(struct usb_descriptor_header)) {
|
1310 |
|
|
header = (struct usb_descriptor_header *)buffer;
|
1311 |
|
|
|
1312 |
|
|
if (header->bLength < 2) {
|
1313 |
|
|
err("invalid descriptor length of %d", header->bLength);
|
1314 |
|
|
return -1;
|
1315 |
|
|
}
|
1316 |
|
|
|
1317 |
|
|
/* If we find another "proper" descriptor then we're done */
|
1318 |
|
|
if ((header->bDescriptorType == USB_DT_ENDPOINT) ||
|
1319 |
|
|
(header->bDescriptorType == USB_DT_INTERFACE) ||
|
1320 |
|
|
(header->bDescriptorType == USB_DT_CONFIG) ||
|
1321 |
|
|
(header->bDescriptorType == USB_DT_DEVICE))
|
1322 |
|
|
break;
|
1323 |
|
|
|
1324 |
|
|
dbg("skipping descriptor 0x%X",
|
1325 |
|
|
header->bDescriptorType);
|
1326 |
|
|
numskipped++;
|
1327 |
|
|
|
1328 |
|
|
buffer += header->bLength;
|
1329 |
|
|
size -= header->bLength;
|
1330 |
|
|
parsed += header->bLength;
|
1331 |
|
|
}
|
1332 |
|
|
if (numskipped)
|
1333 |
|
|
dbg("skipped %d class/vendor specific endpoint descriptors", numskipped);
|
1334 |
|
|
|
1335 |
|
|
/* Copy any unknown descriptors into a storage area for drivers */
|
1336 |
|
|
/* to later parse */
|
1337 |
|
|
len = (int)(buffer - begin);
|
1338 |
|
|
if (!len) {
|
1339 |
|
|
endpoint->extra = NULL;
|
1340 |
|
|
endpoint->extralen = 0;
|
1341 |
|
|
return parsed;
|
1342 |
|
|
}
|
1343 |
|
|
|
1344 |
|
|
endpoint->extra = kmalloc(len, GFP_KERNEL);
|
1345 |
|
|
|
1346 |
|
|
if (!endpoint->extra) {
|
1347 |
|
|
err("couldn't allocate memory for endpoint extra descriptors");
|
1348 |
|
|
endpoint->extralen = 0;
|
1349 |
|
|
return parsed;
|
1350 |
|
|
}
|
1351 |
|
|
|
1352 |
|
|
memcpy(endpoint->extra, begin, len);
|
1353 |
|
|
endpoint->extralen = len;
|
1354 |
|
|
|
1355 |
|
|
return parsed;
|
1356 |
|
|
}
|
1357 |
|
|
|
1358 |
|
|
static int usb_parse_interface(struct usb_interface *interface, unsigned char *buffer, int size)
|
1359 |
|
|
{
|
1360 |
|
|
int i, len, numskipped, retval, parsed = 0;
|
1361 |
|
|
struct usb_descriptor_header *header;
|
1362 |
|
|
struct usb_interface_descriptor *ifp;
|
1363 |
|
|
unsigned char *begin;
|
1364 |
|
|
|
1365 |
|
|
interface->act_altsetting = 0;
|
1366 |
|
|
interface->num_altsetting = 0;
|
1367 |
|
|
interface->max_altsetting = USB_ALTSETTINGALLOC;
|
1368 |
|
|
|
1369 |
|
|
interface->altsetting = kmalloc(sizeof(struct usb_interface_descriptor) * interface->max_altsetting, GFP_KERNEL);
|
1370 |
|
|
|
1371 |
|
|
if (!interface->altsetting) {
|
1372 |
|
|
err("couldn't kmalloc interface->altsetting");
|
1373 |
|
|
return -1;
|
1374 |
|
|
}
|
1375 |
|
|
|
1376 |
|
|
while (size > 0) {
|
1377 |
|
|
if (interface->num_altsetting >= interface->max_altsetting) {
|
1378 |
|
|
void *ptr;
|
1379 |
|
|
int oldmas;
|
1380 |
|
|
|
1381 |
|
|
oldmas = interface->max_altsetting;
|
1382 |
|
|
interface->max_altsetting += USB_ALTSETTINGALLOC;
|
1383 |
|
|
if (interface->max_altsetting > USB_MAXALTSETTING) {
|
1384 |
|
|
warn("too many alternate settings (max %d)",
|
1385 |
|
|
USB_MAXALTSETTING);
|
1386 |
|
|
return -1;
|
1387 |
|
|
}
|
1388 |
|
|
|
1389 |
|
|
ptr = interface->altsetting;
|
1390 |
|
|
interface->altsetting = kmalloc(sizeof(struct usb_interface_descriptor) * interface->max_altsetting, GFP_KERNEL);
|
1391 |
|
|
if (!interface->altsetting) {
|
1392 |
|
|
err("couldn't kmalloc interface->altsetting");
|
1393 |
|
|
interface->altsetting = ptr;
|
1394 |
|
|
return -1;
|
1395 |
|
|
}
|
1396 |
|
|
memcpy(interface->altsetting, ptr, sizeof(struct usb_interface_descriptor) * oldmas);
|
1397 |
|
|
|
1398 |
|
|
kfree(ptr);
|
1399 |
|
|
}
|
1400 |
|
|
|
1401 |
|
|
ifp = interface->altsetting + interface->num_altsetting;
|
1402 |
|
|
interface->num_altsetting++;
|
1403 |
|
|
|
1404 |
|
|
memcpy(ifp, buffer, USB_DT_INTERFACE_SIZE);
|
1405 |
|
|
|
1406 |
|
|
/* Skip over the interface */
|
1407 |
|
|
buffer += ifp->bLength;
|
1408 |
|
|
parsed += ifp->bLength;
|
1409 |
|
|
size -= ifp->bLength;
|
1410 |
|
|
|
1411 |
|
|
begin = buffer;
|
1412 |
|
|
numskipped = 0;
|
1413 |
|
|
|
1414 |
|
|
/* Skip over any interface, class or vendor descriptors */
|
1415 |
|
|
while (size >= sizeof(struct usb_descriptor_header)) {
|
1416 |
|
|
header = (struct usb_descriptor_header *)buffer;
|
1417 |
|
|
|
1418 |
|
|
if (header->bLength < 2) {
|
1419 |
|
|
err("invalid descriptor length of %d", header->bLength);
|
1420 |
|
|
return -1;
|
1421 |
|
|
}
|
1422 |
|
|
|
1423 |
|
|
/* If we find another "proper" descriptor then we're done */
|
1424 |
|
|
if ((header->bDescriptorType == USB_DT_INTERFACE) ||
|
1425 |
|
|
(header->bDescriptorType == USB_DT_ENDPOINT) ||
|
1426 |
|
|
(header->bDescriptorType == USB_DT_CONFIG) ||
|
1427 |
|
|
(header->bDescriptorType == USB_DT_DEVICE))
|
1428 |
|
|
break;
|
1429 |
|
|
|
1430 |
|
|
numskipped++;
|
1431 |
|
|
|
1432 |
|
|
buffer += header->bLength;
|
1433 |
|
|
parsed += header->bLength;
|
1434 |
|
|
size -= header->bLength;
|
1435 |
|
|
}
|
1436 |
|
|
|
1437 |
|
|
if (numskipped)
|
1438 |
|
|
dbg("skipped %d class/vendor specific interface descriptors", numskipped);
|
1439 |
|
|
|
1440 |
|
|
/* Copy any unknown descriptors into a storage area for */
|
1441 |
|
|
/* drivers to later parse */
|
1442 |
|
|
len = (int)(buffer - begin);
|
1443 |
|
|
if (!len) {
|
1444 |
|
|
ifp->extra = NULL;
|
1445 |
|
|
ifp->extralen = 0;
|
1446 |
|
|
} else {
|
1447 |
|
|
ifp->extra = kmalloc(len, GFP_KERNEL);
|
1448 |
|
|
|
1449 |
|
|
if (!ifp->extra) {
|
1450 |
|
|
err("couldn't allocate memory for interface extra descriptors");
|
1451 |
|
|
ifp->extralen = 0;
|
1452 |
|
|
return -1;
|
1453 |
|
|
}
|
1454 |
|
|
memcpy(ifp->extra, begin, len);
|
1455 |
|
|
ifp->extralen = len;
|
1456 |
|
|
}
|
1457 |
|
|
|
1458 |
|
|
/* Did we hit an unexpected descriptor? */
|
1459 |
|
|
header = (struct usb_descriptor_header *)buffer;
|
1460 |
|
|
if ((size >= sizeof(struct usb_descriptor_header)) &&
|
1461 |
|
|
((header->bDescriptorType == USB_DT_CONFIG) ||
|
1462 |
|
|
(header->bDescriptorType == USB_DT_DEVICE)))
|
1463 |
|
|
return parsed;
|
1464 |
|
|
|
1465 |
|
|
if (ifp->bNumEndpoints > USB_MAXENDPOINTS) {
|
1466 |
|
|
warn("too many endpoints");
|
1467 |
|
|
return -1;
|
1468 |
|
|
}
|
1469 |
|
|
|
1470 |
|
|
ifp->endpoint = (struct usb_endpoint_descriptor *)
|
1471 |
|
|
kmalloc(ifp->bNumEndpoints *
|
1472 |
|
|
sizeof(struct usb_endpoint_descriptor), GFP_KERNEL);
|
1473 |
|
|
if (!ifp->endpoint) {
|
1474 |
|
|
err("out of memory");
|
1475 |
|
|
return -1;
|
1476 |
|
|
}
|
1477 |
|
|
|
1478 |
|
|
memset(ifp->endpoint, 0, ifp->bNumEndpoints *
|
1479 |
|
|
sizeof(struct usb_endpoint_descriptor));
|
1480 |
|
|
|
1481 |
|
|
for (i = 0; i < ifp->bNumEndpoints; i++) {
|
1482 |
|
|
header = (struct usb_descriptor_header *)buffer;
|
1483 |
|
|
|
1484 |
|
|
if (header->bLength > size) {
|
1485 |
|
|
err("ran out of descriptors parsing");
|
1486 |
|
|
return -1;
|
1487 |
|
|
}
|
1488 |
|
|
|
1489 |
|
|
retval = usb_parse_endpoint(ifp->endpoint + i, buffer, size);
|
1490 |
|
|
if (retval < 0)
|
1491 |
|
|
return retval;
|
1492 |
|
|
|
1493 |
|
|
buffer += retval;
|
1494 |
|
|
parsed += retval;
|
1495 |
|
|
size -= retval;
|
1496 |
|
|
}
|
1497 |
|
|
|
1498 |
|
|
/* We check to see if it's an alternate to this one */
|
1499 |
|
|
ifp = (struct usb_interface_descriptor *)buffer;
|
1500 |
|
|
if (size < USB_DT_INTERFACE_SIZE ||
|
1501 |
|
|
ifp->bDescriptorType != USB_DT_INTERFACE ||
|
1502 |
|
|
!ifp->bAlternateSetting)
|
1503 |
|
|
return parsed;
|
1504 |
|
|
}
|
1505 |
|
|
|
1506 |
|
|
return parsed;
|
1507 |
|
|
}
|
1508 |
|
|
|
1509 |
|
|
int usb_parse_configuration(struct usb_config_descriptor *config, char *buffer)
|
1510 |
|
|
{
|
1511 |
|
|
int i, retval, size;
|
1512 |
|
|
struct usb_descriptor_header *header;
|
1513 |
|
|
|
1514 |
|
|
memcpy(config, buffer, USB_DT_CONFIG_SIZE);
|
1515 |
|
|
le16_to_cpus(&config->wTotalLength);
|
1516 |
|
|
size = config->wTotalLength;
|
1517 |
|
|
|
1518 |
|
|
if (config->bNumInterfaces > USB_MAXINTERFACES) {
|
1519 |
|
|
warn("too many interfaces");
|
1520 |
|
|
return -1;
|
1521 |
|
|
}
|
1522 |
|
|
|
1523 |
|
|
config->interface = (struct usb_interface *)
|
1524 |
|
|
kmalloc(config->bNumInterfaces *
|
1525 |
|
|
sizeof(struct usb_interface), GFP_KERNEL);
|
1526 |
|
|
dbg("kmalloc IF %p, numif %i", config->interface, config->bNumInterfaces);
|
1527 |
|
|
if (!config->interface) {
|
1528 |
|
|
err("out of memory");
|
1529 |
|
|
return -1;
|
1530 |
|
|
}
|
1531 |
|
|
|
1532 |
|
|
memset(config->interface, 0,
|
1533 |
|
|
config->bNumInterfaces * sizeof(struct usb_interface));
|
1534 |
|
|
|
1535 |
|
|
buffer += config->bLength;
|
1536 |
|
|
size -= config->bLength;
|
1537 |
|
|
|
1538 |
|
|
config->extra = NULL;
|
1539 |
|
|
config->extralen = 0;
|
1540 |
|
|
|
1541 |
|
|
for (i = 0; i < config->bNumInterfaces; i++) {
|
1542 |
|
|
int numskipped, len;
|
1543 |
|
|
char *begin;
|
1544 |
|
|
|
1545 |
|
|
/* Skip over the rest of the Class Specific or Vendor */
|
1546 |
|
|
/* Specific descriptors */
|
1547 |
|
|
begin = buffer;
|
1548 |
|
|
numskipped = 0;
|
1549 |
|
|
while (size >= sizeof(struct usb_descriptor_header)) {
|
1550 |
|
|
header = (struct usb_descriptor_header *)buffer;
|
1551 |
|
|
|
1552 |
|
|
if ((header->bLength > size) || (header->bLength < 2)) {
|
1553 |
|
|
err("invalid descriptor length of %d", header->bLength);
|
1554 |
|
|
return -1;
|
1555 |
|
|
}
|
1556 |
|
|
|
1557 |
|
|
/* If we find another "proper" descriptor then we're done */
|
1558 |
|
|
if ((header->bDescriptorType == USB_DT_ENDPOINT) ||
|
1559 |
|
|
(header->bDescriptorType == USB_DT_INTERFACE) ||
|
1560 |
|
|
(header->bDescriptorType == USB_DT_CONFIG) ||
|
1561 |
|
|
(header->bDescriptorType == USB_DT_DEVICE))
|
1562 |
|
|
break;
|
1563 |
|
|
|
1564 |
|
|
dbg("skipping descriptor 0x%X", header->bDescriptorType);
|
1565 |
|
|
numskipped++;
|
1566 |
|
|
|
1567 |
|
|
buffer += header->bLength;
|
1568 |
|
|
size -= header->bLength;
|
1569 |
|
|
}
|
1570 |
|
|
if (numskipped)
|
1571 |
|
|
dbg("skipped %d class/vendor specific endpoint descriptors", numskipped);
|
1572 |
|
|
|
1573 |
|
|
/* Copy any unknown descriptors into a storage area for */
|
1574 |
|
|
/* drivers to later parse */
|
1575 |
|
|
len = (int)(buffer - begin);
|
1576 |
|
|
if (len) {
|
1577 |
|
|
if (config->extralen) {
|
1578 |
|
|
warn("extra config descriptor");
|
1579 |
|
|
} else {
|
1580 |
|
|
config->extra = kmalloc(len, GFP_KERNEL);
|
1581 |
|
|
if (!config->extra) {
|
1582 |
|
|
err("couldn't allocate memory for config extra descriptors");
|
1583 |
|
|
config->extralen = 0;
|
1584 |
|
|
return -1;
|
1585 |
|
|
}
|
1586 |
|
|
|
1587 |
|
|
memcpy(config->extra, begin, len);
|
1588 |
|
|
config->extralen = len;
|
1589 |
|
|
}
|
1590 |
|
|
}
|
1591 |
|
|
|
1592 |
|
|
retval = usb_parse_interface(config->interface + i, buffer, size);
|
1593 |
|
|
if (retval < 0)
|
1594 |
|
|
return retval;
|
1595 |
|
|
|
1596 |
|
|
buffer += retval;
|
1597 |
|
|
size -= retval;
|
1598 |
|
|
}
|
1599 |
|
|
|
1600 |
|
|
return size;
|
1601 |
|
|
}
|
1602 |
|
|
|
1603 |
|
|
void usb_destroy_configuration(struct usb_device *dev)
|
1604 |
|
|
{
|
1605 |
|
|
int c, i, j, k;
|
1606 |
|
|
|
1607 |
|
|
if (!dev->config)
|
1608 |
|
|
return;
|
1609 |
|
|
|
1610 |
|
|
if (dev->rawdescriptors) {
|
1611 |
|
|
for (i = 0; i < dev->descriptor.bNumConfigurations; i++)
|
1612 |
|
|
kfree(dev->rawdescriptors[i]);
|
1613 |
|
|
|
1614 |
|
|
kfree(dev->rawdescriptors);
|
1615 |
|
|
}
|
1616 |
|
|
|
1617 |
|
|
for (c = 0; c < dev->descriptor.bNumConfigurations; c++) {
|
1618 |
|
|
struct usb_config_descriptor *cf = &dev->config[c];
|
1619 |
|
|
|
1620 |
|
|
if (!cf->interface)
|
1621 |
|
|
break;
|
1622 |
|
|
|
1623 |
|
|
for (i = 0; i < cf->bNumInterfaces; i++) {
|
1624 |
|
|
struct usb_interface *ifp =
|
1625 |
|
|
&cf->interface[i];
|
1626 |
|
|
|
1627 |
|
|
if (!ifp->altsetting)
|
1628 |
|
|
break;
|
1629 |
|
|
|
1630 |
|
|
for (j = 0; j < ifp->num_altsetting; j++) {
|
1631 |
|
|
struct usb_interface_descriptor *as =
|
1632 |
|
|
&ifp->altsetting[j];
|
1633 |
|
|
|
1634 |
|
|
if(as->extra) {
|
1635 |
|
|
kfree(as->extra);
|
1636 |
|
|
}
|
1637 |
|
|
|
1638 |
|
|
if (!as->endpoint)
|
1639 |
|
|
break;
|
1640 |
|
|
|
1641 |
|
|
for(k = 0; k < as->bNumEndpoints; k++) {
|
1642 |
|
|
if(as->endpoint[k].extra) {
|
1643 |
|
|
kfree(as->endpoint[k].extra);
|
1644 |
|
|
}
|
1645 |
|
|
}
|
1646 |
|
|
kfree(as->endpoint);
|
1647 |
|
|
}
|
1648 |
|
|
|
1649 |
|
|
kfree(ifp->altsetting);
|
1650 |
|
|
}
|
1651 |
|
|
kfree(cf->interface);
|
1652 |
|
|
}
|
1653 |
|
|
kfree(dev->config);
|
1654 |
|
|
}
|
1655 |
|
|
|
1656 |
|
|
/* for returning string descriptors in UTF-16LE */
|
1657 |
|
|
static int ascii2utf (char *ascii, __u8 *utf, int utfmax)
|
1658 |
|
|
{
|
1659 |
|
|
int retval;
|
1660 |
|
|
|
1661 |
|
|
for (retval = 0; *ascii && utfmax > 1; utfmax -= 2, retval += 2) {
|
1662 |
|
|
*utf++ = *ascii++ & 0x7f;
|
1663 |
|
|
*utf++ = 0;
|
1664 |
|
|
}
|
1665 |
|
|
return retval;
|
1666 |
|
|
}
|
1667 |
|
|
|
1668 |
|
|
/*
|
1669 |
|
|
* root_hub_string is used by each host controller's root hub code,
|
1670 |
|
|
* so that they're identified consistently throughout the system.
|
1671 |
|
|
*/
|
1672 |
|
|
int usb_root_hub_string (int id, int serial, char *type, __u8 *data, int len)
|
1673 |
|
|
{
|
1674 |
|
|
char buf [30];
|
1675 |
|
|
|
1676 |
|
|
// assert (len > (2 * (sizeof (buf) + 1)));
|
1677 |
|
|
// assert (strlen (type) <= 8);
|
1678 |
|
|
|
1679 |
|
|
// language ids
|
1680 |
|
|
if (id == 0) {
|
1681 |
|
|
*data++ = 4; *data++ = 3; /* 4 bytes data */
|
1682 |
|
|
*data++ = 0; *data++ = 0; /* some language id */
|
1683 |
|
|
return 4;
|
1684 |
|
|
|
1685 |
|
|
// serial number
|
1686 |
|
|
} else if (id == 1) {
|
1687 |
|
|
sprintf (buf, "%x", serial);
|
1688 |
|
|
|
1689 |
|
|
// product description
|
1690 |
|
|
} else if (id == 2) {
|
1691 |
|
|
sprintf (buf, "USB %s Root Hub", type);
|
1692 |
|
|
|
1693 |
|
|
// id 3 == vendor description
|
1694 |
|
|
|
1695 |
|
|
// unsupported IDs --> "stall"
|
1696 |
|
|
} else
|
1697 |
|
|
return 0;
|
1698 |
|
|
|
1699 |
|
|
data [0] = 2 + ascii2utf (buf, data + 2, len - 2);
|
1700 |
|
|
data [1] = 3;
|
1701 |
|
|
return data [0];
|
1702 |
|
|
}
|
1703 |
|
|
|
1704 |
|
|
/*
|
1705 |
|
|
* __usb_get_extra_descriptor() finds a descriptor of specific type in the
|
1706 |
|
|
* extra field of the interface and endpoint descriptor structs.
|
1707 |
|
|
*/
|
1708 |
|
|
|
1709 |
|
|
int __usb_get_extra_descriptor(char *buffer, unsigned size, unsigned char type, void **ptr)
|
1710 |
|
|
{
|
1711 |
|
|
struct usb_descriptor_header *header;
|
1712 |
|
|
|
1713 |
|
|
while (size >= sizeof(struct usb_descriptor_header)) {
|
1714 |
|
|
header = (struct usb_descriptor_header *)buffer;
|
1715 |
|
|
|
1716 |
|
|
if (header->bLength < 2) {
|
1717 |
|
|
err("invalid descriptor length of %d", header->bLength);
|
1718 |
|
|
return -1;
|
1719 |
|
|
}
|
1720 |
|
|
|
1721 |
|
|
if (header->bDescriptorType == type) {
|
1722 |
|
|
*ptr = header;
|
1723 |
|
|
return 0;
|
1724 |
|
|
}
|
1725 |
|
|
|
1726 |
|
|
buffer += header->bLength;
|
1727 |
|
|
size -= header->bLength;
|
1728 |
|
|
}
|
1729 |
|
|
return -1;
|
1730 |
|
|
}
|
1731 |
|
|
|
1732 |
|
|
/*
|
1733 |
|
|
* Something got disconnected. Get rid of it, and all of its children.
|
1734 |
|
|
*/
|
1735 |
|
|
void usb_disconnect(struct usb_device **pdev)
|
1736 |
|
|
{
|
1737 |
|
|
struct usb_device * dev = *pdev;
|
1738 |
|
|
int i;
|
1739 |
|
|
|
1740 |
|
|
if (!dev)
|
1741 |
|
|
return;
|
1742 |
|
|
|
1743 |
|
|
*pdev = NULL;
|
1744 |
|
|
|
1745 |
|
|
info("USB disconnect on device %s-%s address %d",
|
1746 |
|
|
dev->bus->bus_name, dev->devpath, dev->devnum);
|
1747 |
|
|
|
1748 |
|
|
if (dev->actconfig) {
|
1749 |
|
|
for (i = 0; i < dev->actconfig->bNumInterfaces; i++) {
|
1750 |
|
|
struct usb_interface *interface = &dev->actconfig->interface[i];
|
1751 |
|
|
struct usb_driver *driver = interface->driver;
|
1752 |
|
|
if (driver) {
|
1753 |
|
|
down(&driver->serialize);
|
1754 |
|
|
driver->disconnect(dev, interface->private_data);
|
1755 |
|
|
up(&driver->serialize);
|
1756 |
|
|
/* if driver->disconnect didn't release the interface */
|
1757 |
|
|
if (interface->driver)
|
1758 |
|
|
usb_driver_release_interface(driver, interface);
|
1759 |
|
|
}
|
1760 |
|
|
}
|
1761 |
|
|
}
|
1762 |
|
|
|
1763 |
|
|
/* Free up all the children.. */
|
1764 |
|
|
for (i = 0; i < USB_MAXCHILDREN; i++) {
|
1765 |
|
|
struct usb_device **child = dev->children + i;
|
1766 |
|
|
if (*child)
|
1767 |
|
|
usb_disconnect(child);
|
1768 |
|
|
}
|
1769 |
|
|
|
1770 |
|
|
/* Let policy agent unload modules etc */
|
1771 |
|
|
call_policy ("remove", dev);
|
1772 |
|
|
|
1773 |
|
|
/* Free the device number and remove the /proc/bus/usb entry */
|
1774 |
|
|
if (dev->devnum > 0) {
|
1775 |
|
|
clear_bit(dev->devnum, &dev->bus->devmap.devicemap);
|
1776 |
|
|
usbdevfs_remove_device(dev);
|
1777 |
|
|
}
|
1778 |
|
|
|
1779 |
|
|
/* Free up the device itself */
|
1780 |
|
|
usb_free_dev(dev);
|
1781 |
|
|
}
|
1782 |
|
|
|
1783 |
|
|
/*
|
1784 |
|
|
* Connect a new USB device. This basically just initializes
|
1785 |
|
|
* the USB device information and sets up the topology - it's
|
1786 |
|
|
* up to the low-level driver to reset the port and actually
|
1787 |
|
|
* do the setup (the upper levels don't know how to do that).
|
1788 |
|
|
*/
|
1789 |
|
|
void usb_connect(struct usb_device *dev)
|
1790 |
|
|
{
|
1791 |
|
|
int devnum;
|
1792 |
|
|
// FIXME needs locking for SMP!!
|
1793 |
|
|
/* why? this is called only from the hub thread,
|
1794 |
|
|
* which hopefully doesn't run on multiple CPU's simultaneously 8-)
|
1795 |
|
|
*/
|
1796 |
|
|
dev->descriptor.bMaxPacketSize0 = 8; /* Start off at 8 bytes */
|
1797 |
|
|
#ifndef DEVNUM_ROUND_ROBIN
|
1798 |
|
|
devnum = find_next_zero_bit(dev->bus->devmap.devicemap, 128, 1);
|
1799 |
|
|
#else /* round_robin alloc of devnums */
|
1800 |
|
|
/* Try to allocate the next devnum beginning at bus->devnum_next. */
|
1801 |
|
|
devnum = find_next_zero_bit(dev->bus->devmap.devicemap, 128, dev->bus->devnum_next);
|
1802 |
|
|
if (devnum >= 128)
|
1803 |
|
|
devnum = find_next_zero_bit(dev->bus->devmap.devicemap, 128, 1);
|
1804 |
|
|
|
1805 |
|
|
dev->bus->devnum_next = ( devnum >= 127 ? 1 : devnum + 1);
|
1806 |
|
|
#endif /* round_robin alloc of devnums */
|
1807 |
|
|
|
1808 |
|
|
if (devnum < 128) {
|
1809 |
|
|
set_bit(devnum, dev->bus->devmap.devicemap);
|
1810 |
|
|
dev->devnum = devnum;
|
1811 |
|
|
}
|
1812 |
|
|
}
|
1813 |
|
|
|
1814 |
|
|
/*
|
1815 |
|
|
* These are the actual routines to send
|
1816 |
|
|
* and receive control messages.
|
1817 |
|
|
*/
|
1818 |
|
|
|
1819 |
|
|
/* USB spec identifies 5 second timeouts.
|
1820 |
|
|
* Some devices (MGE Ellipse UPSes, etc) need it, too.
|
1821 |
|
|
*/
|
1822 |
|
|
#define GET_TIMEOUT 5
|
1823 |
|
|
#define SET_TIMEOUT 5
|
1824 |
|
|
|
1825 |
|
|
int usb_set_address(struct usb_device *dev)
|
1826 |
|
|
{
|
1827 |
|
|
return usb_control_msg(dev, usb_snddefctrl(dev), USB_REQ_SET_ADDRESS,
|
1828 |
|
|
0, dev->devnum, 0, NULL, 0, HZ * SET_TIMEOUT);
|
1829 |
|
|
}
|
1830 |
|
|
|
1831 |
|
|
int usb_get_descriptor(struct usb_device *dev, unsigned char type, unsigned char index, void *buf, int size)
|
1832 |
|
|
{
|
1833 |
|
|
int i = 5;
|
1834 |
|
|
int result;
|
1835 |
|
|
|
1836 |
|
|
memset(buf,0,size); // Make sure we parse really received data
|
1837 |
|
|
|
1838 |
|
|
while (i--) {
|
1839 |
|
|
if ((result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
1840 |
|
|
USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
|
1841 |
|
|
(type << 8) + index, 0, buf, size, HZ * GET_TIMEOUT)) > 0 ||
|
1842 |
|
|
result == -EPIPE)
|
1843 |
|
|
break; /* retry if the returned length was 0; flaky device */
|
1844 |
|
|
}
|
1845 |
|
|
return result;
|
1846 |
|
|
}
|
1847 |
|
|
|
1848 |
|
|
int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
|
1849 |
|
|
unsigned char type, unsigned char id, void *buf, int size)
|
1850 |
|
|
{
|
1851 |
|
|
return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
1852 |
|
|
USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
|
1853 |
|
|
(type << 8) + id, ifnum, buf, size, HZ * GET_TIMEOUT);
|
1854 |
|
|
}
|
1855 |
|
|
|
1856 |
|
|
int usb_get_string(struct usb_device *dev, unsigned short langid, unsigned char index, void *buf, int size)
|
1857 |
|
|
{
|
1858 |
|
|
return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
1859 |
|
|
USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
|
1860 |
|
|
(USB_DT_STRING << 8) + index, langid, buf, size, HZ * GET_TIMEOUT);
|
1861 |
|
|
}
|
1862 |
|
|
|
1863 |
|
|
int usb_get_device_descriptor(struct usb_device *dev)
|
1864 |
|
|
{
|
1865 |
|
|
int ret = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor,
|
1866 |
|
|
sizeof(dev->descriptor));
|
1867 |
|
|
if (ret >= 0) {
|
1868 |
|
|
le16_to_cpus(&dev->descriptor.bcdUSB);
|
1869 |
|
|
le16_to_cpus(&dev->descriptor.idVendor);
|
1870 |
|
|
le16_to_cpus(&dev->descriptor.idProduct);
|
1871 |
|
|
le16_to_cpus(&dev->descriptor.bcdDevice);
|
1872 |
|
|
}
|
1873 |
|
|
return ret;
|
1874 |
|
|
}
|
1875 |
|
|
|
1876 |
|
|
int usb_get_status(struct usb_device *dev, int type, int target, void *data)
|
1877 |
|
|
{
|
1878 |
|
|
return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
1879 |
|
|
USB_REQ_GET_STATUS, USB_DIR_IN | type, 0, target, data, 2, HZ * GET_TIMEOUT);
|
1880 |
|
|
}
|
1881 |
|
|
|
1882 |
|
|
int usb_get_protocol(struct usb_device *dev, int ifnum)
|
1883 |
|
|
{
|
1884 |
|
|
unsigned char type;
|
1885 |
|
|
int ret;
|
1886 |
|
|
|
1887 |
|
|
if ((ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
1888 |
|
|
USB_REQ_GET_PROTOCOL, USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
|
1889 |
|
|
0, ifnum, &type, 1, HZ * GET_TIMEOUT)) < 0)
|
1890 |
|
|
return ret;
|
1891 |
|
|
|
1892 |
|
|
return type;
|
1893 |
|
|
}
|
1894 |
|
|
|
1895 |
|
|
int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
|
1896 |
|
|
{
|
1897 |
|
|
return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
1898 |
|
|
USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
|
1899 |
|
|
protocol, ifnum, NULL, 0, HZ * SET_TIMEOUT);
|
1900 |
|
|
}
|
1901 |
|
|
|
1902 |
|
|
int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
|
1903 |
|
|
{
|
1904 |
|
|
return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
1905 |
|
|
USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
|
1906 |
|
|
(duration << 8) | report_id, ifnum, NULL, 0, HZ * SET_TIMEOUT);
|
1907 |
|
|
}
|
1908 |
|
|
|
1909 |
|
|
void usb_set_maxpacket(struct usb_device *dev)
|
1910 |
|
|
{
|
1911 |
|
|
int i, b;
|
1912 |
|
|
|
1913 |
|
|
for (i=0; i<dev->actconfig->bNumInterfaces; i++) {
|
1914 |
|
|
struct usb_interface *ifp = dev->actconfig->interface + i;
|
1915 |
|
|
struct usb_interface_descriptor *as = ifp->altsetting + ifp->act_altsetting;
|
1916 |
|
|
struct usb_endpoint_descriptor *ep = as->endpoint;
|
1917 |
|
|
int e;
|
1918 |
|
|
|
1919 |
|
|
for (e=0; e<as->bNumEndpoints; e++) {
|
1920 |
|
|
b = ep[e].bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
|
1921 |
|
|
if ((ep[e].bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
|
1922 |
|
|
USB_ENDPOINT_XFER_CONTROL) { /* Control => bidirectional */
|
1923 |
|
|
dev->epmaxpacketout[b] = ep[e].wMaxPacketSize;
|
1924 |
|
|
dev->epmaxpacketin [b] = ep[e].wMaxPacketSize;
|
1925 |
|
|
}
|
1926 |
|
|
else if (usb_endpoint_out(ep[e].bEndpointAddress)) {
|
1927 |
|
|
if (ep[e].wMaxPacketSize > dev->epmaxpacketout[b])
|
1928 |
|
|
dev->epmaxpacketout[b] = ep[e].wMaxPacketSize;
|
1929 |
|
|
}
|
1930 |
|
|
else {
|
1931 |
|
|
if (ep[e].wMaxPacketSize > dev->epmaxpacketin [b])
|
1932 |
|
|
dev->epmaxpacketin [b] = ep[e].wMaxPacketSize;
|
1933 |
|
|
}
|
1934 |
|
|
}
|
1935 |
|
|
}
|
1936 |
|
|
}
|
1937 |
|
|
|
1938 |
|
|
/*
|
1939 |
|
|
* endp: endpoint number in bits 0-3;
|
1940 |
|
|
* direction flag in bit 7 (1 = IN, 0 = OUT)
|
1941 |
|
|
*/
|
1942 |
|
|
int usb_clear_halt(struct usb_device *dev, int pipe)
|
1943 |
|
|
{
|
1944 |
|
|
int result;
|
1945 |
|
|
__u16 status;
|
1946 |
|
|
unsigned char *buffer;
|
1947 |
|
|
int endp=usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
|
1948 |
|
|
|
1949 |
|
|
/*
|
1950 |
|
|
if (!usb_endpoint_halted(dev, endp & 0x0f, usb_endpoint_out(endp)))
|
1951 |
|
|
return 0;
|
1952 |
|
|
*/
|
1953 |
|
|
|
1954 |
|
|
result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
1955 |
|
|
USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0, endp, NULL, 0, HZ * SET_TIMEOUT);
|
1956 |
|
|
|
1957 |
|
|
/* don't clear if failed */
|
1958 |
|
|
if (result < 0)
|
1959 |
|
|
return result;
|
1960 |
|
|
|
1961 |
|
|
buffer = kmalloc(sizeof(status), GFP_KERNEL);
|
1962 |
|
|
if (!buffer) {
|
1963 |
|
|
err("unable to allocate memory for configuration descriptors");
|
1964 |
|
|
return -ENOMEM;
|
1965 |
|
|
}
|
1966 |
|
|
|
1967 |
|
|
result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
1968 |
|
|
USB_REQ_GET_STATUS, USB_DIR_IN | USB_RECIP_ENDPOINT, 0, endp,
|
1969 |
|
|
buffer, sizeof(status), HZ * SET_TIMEOUT);
|
1970 |
|
|
|
1971 |
|
|
memcpy(&status, buffer, sizeof(status));
|
1972 |
|
|
kfree(buffer);
|
1973 |
|
|
|
1974 |
|
|
if (result < 0)
|
1975 |
|
|
return result;
|
1976 |
|
|
|
1977 |
|
|
if (le16_to_cpu(status) & 1)
|
1978 |
|
|
return -EPIPE; /* still halted */
|
1979 |
|
|
|
1980 |
|
|
usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
|
1981 |
|
|
|
1982 |
|
|
/* toggle is reset on clear */
|
1983 |
|
|
|
1984 |
|
|
usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
|
1985 |
|
|
|
1986 |
|
|
return 0;
|
1987 |
|
|
}
|
1988 |
|
|
|
1989 |
|
|
int usb_set_interface(struct usb_device *dev, int interface, int alternate)
|
1990 |
|
|
{
|
1991 |
|
|
struct usb_interface *iface;
|
1992 |
|
|
int ret;
|
1993 |
|
|
|
1994 |
|
|
iface = usb_ifnum_to_if(dev, interface);
|
1995 |
|
|
if (!iface) {
|
1996 |
|
|
warn("selecting invalid interface %d", interface);
|
1997 |
|
|
return -EINVAL;
|
1998 |
|
|
}
|
1999 |
|
|
|
2000 |
|
|
/* 9.4.10 says devices don't need this, if the interface
|
2001 |
|
|
only has one alternate setting */
|
2002 |
|
|
if (iface->num_altsetting == 1) {
|
2003 |
|
|
dbg("ignoring set_interface for dev %d, iface %d, alt %d",
|
2004 |
|
|
dev->devnum, interface, alternate);
|
2005 |
|
|
return 0;
|
2006 |
|
|
}
|
2007 |
|
|
|
2008 |
|
|
if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
2009 |
|
|
USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE, alternate,
|
2010 |
|
|
interface, NULL, 0, HZ * 5)) < 0)
|
2011 |
|
|
return ret;
|
2012 |
|
|
|
2013 |
|
|
iface->act_altsetting = alternate;
|
2014 |
|
|
dev->toggle[0] = 0; /* 9.1.1.5 says to do this */
|
2015 |
|
|
dev->toggle[1] = 0;
|
2016 |
|
|
usb_set_maxpacket(dev);
|
2017 |
|
|
return 0;
|
2018 |
|
|
}
|
2019 |
|
|
|
2020 |
|
|
int usb_set_configuration(struct usb_device *dev, int configuration)
|
2021 |
|
|
{
|
2022 |
|
|
int i, ret;
|
2023 |
|
|
struct usb_config_descriptor *cp = NULL;
|
2024 |
|
|
|
2025 |
|
|
for (i=0; i<dev->descriptor.bNumConfigurations; i++) {
|
2026 |
|
|
if (dev->config[i].bConfigurationValue == configuration) {
|
2027 |
|
|
cp = &dev->config[i];
|
2028 |
|
|
break;
|
2029 |
|
|
}
|
2030 |
|
|
}
|
2031 |
|
|
if (!cp) {
|
2032 |
|
|
warn("selecting invalid configuration %d", configuration);
|
2033 |
|
|
return -EINVAL;
|
2034 |
|
|
}
|
2035 |
|
|
|
2036 |
|
|
if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
2037 |
|
|
USB_REQ_SET_CONFIGURATION, 0, configuration, 0, NULL, 0, HZ * SET_TIMEOUT)) < 0)
|
2038 |
|
|
return ret;
|
2039 |
|
|
|
2040 |
|
|
dev->actconfig = cp;
|
2041 |
|
|
dev->toggle[0] = 0;
|
2042 |
|
|
dev->toggle[1] = 0;
|
2043 |
|
|
usb_set_maxpacket(dev);
|
2044 |
|
|
|
2045 |
|
|
return 0;
|
2046 |
|
|
}
|
2047 |
|
|
|
2048 |
|
|
int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type, unsigned char id, void *buf, int size)
|
2049 |
|
|
{
|
2050 |
|
|
return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
|
2051 |
|
|
USB_REQ_GET_REPORT, USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
|
2052 |
|
|
(type << 8) + id, ifnum, buf, size, HZ * GET_TIMEOUT);
|
2053 |
|
|
}
|
2054 |
|
|
|
2055 |
|
|
int usb_set_report(struct usb_device *dev, int ifnum, unsigned char type, unsigned char id, void *buf, int size)
|
2056 |
|
|
{
|
2057 |
|
|
return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
|
2058 |
|
|
USB_REQ_SET_REPORT, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
|
2059 |
|
|
(type << 8) + id, ifnum, buf, size, HZ);
|
2060 |
|
|
}
|
2061 |
|
|
|
2062 |
|
|
int usb_get_configuration(struct usb_device *dev)
|
2063 |
|
|
{
|
2064 |
|
|
int result;
|
2065 |
|
|
unsigned int cfgno, length;
|
2066 |
|
|
unsigned char *buffer;
|
2067 |
|
|
unsigned char *bigbuffer;
|
2068 |
|
|
struct usb_config_descriptor *desc;
|
2069 |
|
|
|
2070 |
|
|
if (dev->descriptor.bNumConfigurations > USB_MAXCONFIG) {
|
2071 |
|
|
warn("too many configurations");
|
2072 |
|
|
return -EINVAL;
|
2073 |
|
|
}
|
2074 |
|
|
|
2075 |
|
|
if (dev->descriptor.bNumConfigurations < 1) {
|
2076 |
|
|
warn("not enough configurations");
|
2077 |
|
|
return -EINVAL;
|
2078 |
|
|
}
|
2079 |
|
|
|
2080 |
|
|
dev->config = (struct usb_config_descriptor *)
|
2081 |
|
|
kmalloc(dev->descriptor.bNumConfigurations *
|
2082 |
|
|
sizeof(struct usb_config_descriptor), GFP_KERNEL);
|
2083 |
|
|
if (!dev->config) {
|
2084 |
|
|
err("out of memory");
|
2085 |
|
|
return -ENOMEM;
|
2086 |
|
|
}
|
2087 |
|
|
memset(dev->config, 0, dev->descriptor.bNumConfigurations *
|
2088 |
|
|
sizeof(struct usb_config_descriptor));
|
2089 |
|
|
|
2090 |
|
|
dev->rawdescriptors = (char **)kmalloc(sizeof(char *) *
|
2091 |
|
|
dev->descriptor.bNumConfigurations, GFP_KERNEL);
|
2092 |
|
|
if (!dev->rawdescriptors) {
|
2093 |
|
|
err("out of memory");
|
2094 |
|
|
return -ENOMEM;
|
2095 |
|
|
}
|
2096 |
|
|
|
2097 |
|
|
buffer = kmalloc(8, GFP_KERNEL);
|
2098 |
|
|
if (!buffer) {
|
2099 |
|
|
err("unable to allocate memory for configuration descriptors");
|
2100 |
|
|
return -ENOMEM;
|
2101 |
|
|
}
|
2102 |
|
|
desc = (struct usb_config_descriptor *)buffer;
|
2103 |
|
|
|
2104 |
|
|
for (cfgno = 0; cfgno < dev->descriptor.bNumConfigurations; cfgno++) {
|
2105 |
|
|
/* We grab the first 8 bytes so we know how long the whole */
|
2106 |
|
|
/* configuration is */
|
2107 |
|
|
result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 8);
|
2108 |
|
|
if (result < 8) {
|
2109 |
|
|
if (result < 0)
|
2110 |
|
|
err("unable to get descriptor");
|
2111 |
|
|
else {
|
2112 |
|
|
err("config descriptor too short (expected %i, got %i)", 8, result);
|
2113 |
|
|
result = -EINVAL;
|
2114 |
|
|
}
|
2115 |
|
|
goto err;
|
2116 |
|
|
}
|
2117 |
|
|
|
2118 |
|
|
/* Get the full buffer */
|
2119 |
|
|
length = le16_to_cpu(desc->wTotalLength);
|
2120 |
|
|
|
2121 |
|
|
bigbuffer = kmalloc(length, GFP_KERNEL);
|
2122 |
|
|
if (!bigbuffer) {
|
2123 |
|
|
err("unable to allocate memory for configuration descriptors");
|
2124 |
|
|
result = -ENOMEM;
|
2125 |
|
|
goto err;
|
2126 |
|
|
}
|
2127 |
|
|
|
2128 |
|
|
/* Now that we know the length, get the whole thing */
|
2129 |
|
|
result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, bigbuffer, length);
|
2130 |
|
|
if (result < 0) {
|
2131 |
|
|
err("couldn't get all of config descriptors");
|
2132 |
|
|
kfree(bigbuffer);
|
2133 |
|
|
goto err;
|
2134 |
|
|
}
|
2135 |
|
|
|
2136 |
|
|
if (result < length) {
|
2137 |
|
|
err("config descriptor too short (expected %i, got %i)", length, result);
|
2138 |
|
|
result = -EINVAL;
|
2139 |
|
|
kfree(bigbuffer);
|
2140 |
|
|
goto err;
|
2141 |
|
|
}
|
2142 |
|
|
|
2143 |
|
|
dev->rawdescriptors[cfgno] = bigbuffer;
|
2144 |
|
|
|
2145 |
|
|
result = usb_parse_configuration(&dev->config[cfgno], bigbuffer);
|
2146 |
|
|
if (result > 0)
|
2147 |
|
|
dbg("descriptor data left");
|
2148 |
|
|
else if (result < 0) {
|
2149 |
|
|
result = -EINVAL;
|
2150 |
|
|
goto err;
|
2151 |
|
|
}
|
2152 |
|
|
}
|
2153 |
|
|
|
2154 |
|
|
kfree(buffer);
|
2155 |
|
|
return 0;
|
2156 |
|
|
err:
|
2157 |
|
|
kfree(buffer);
|
2158 |
|
|
dev->descriptor.bNumConfigurations = cfgno;
|
2159 |
|
|
return result;
|
2160 |
|
|
}
|
2161 |
|
|
|
2162 |
|
|
/*
|
2163 |
|
|
* usb_string:
|
2164 |
|
|
* returns string length (> 0) or error (< 0)
|
2165 |
|
|
*/
|
2166 |
|
|
int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
|
2167 |
|
|
{
|
2168 |
|
|
unsigned char *tbuf;
|
2169 |
|
|
int err;
|
2170 |
|
|
unsigned int u, idx;
|
2171 |
|
|
|
2172 |
|
|
if (size <= 0 || !buf || !index)
|
2173 |
|
|
return -EINVAL;
|
2174 |
|
|
buf[0] = 0;
|
2175 |
|
|
tbuf = kmalloc(256, GFP_KERNEL);
|
2176 |
|
|
if (!tbuf)
|
2177 |
|
|
return -ENOMEM;
|
2178 |
|
|
|
2179 |
|
|
/* get langid for strings if it's not yet known */
|
2180 |
|
|
if (!dev->have_langid) {
|
2181 |
|
|
err = usb_get_string(dev, 0, 0, tbuf, 4);
|
2182 |
|
|
if (err < 0) {
|
2183 |
|
|
err("error getting string descriptor 0 (error=%d)", err);
|
2184 |
|
|
goto errout;
|
2185 |
|
|
} else if (err < 4 || tbuf[0] < 4) {
|
2186 |
|
|
err("string descriptor 0 too short");
|
2187 |
|
|
err = -EINVAL;
|
2188 |
|
|
goto errout;
|
2189 |
|
|
} else {
|
2190 |
|
|
dev->have_langid = -1;
|
2191 |
|
|
dev->string_langid = tbuf[2] | (tbuf[3]<< 8);
|
2192 |
|
|
/* always use the first langid listed */
|
2193 |
|
|
dbg("USB device number %d default language ID 0x%x",
|
2194 |
|
|
dev->devnum, dev->string_langid);
|
2195 |
|
|
}
|
2196 |
|
|
}
|
2197 |
|
|
|
2198 |
|
|
/*
|
2199 |
|
|
* Just ask for a maximum length string and then take the length
|
2200 |
|
|
* that was returned.
|
2201 |
|
|
*/
|
2202 |
|
|
err = usb_get_string(dev, dev->string_langid, index, tbuf, 255);
|
2203 |
|
|
if (err < 0)
|
2204 |
|
|
goto errout;
|
2205 |
|
|
|
2206 |
|
|
size--; /* leave room for trailing NULL char in output buffer */
|
2207 |
|
|
for (idx = 0, u = 2; u < err; u += 2) {
|
2208 |
|
|
if (idx >= size)
|
2209 |
|
|
break;
|
2210 |
|
|
if (tbuf[u+1]) /* high byte */
|
2211 |
|
|
buf[idx++] = '?'; /* non-ASCII character */
|
2212 |
|
|
else
|
2213 |
|
|
buf[idx++] = tbuf[u];
|
2214 |
|
|
}
|
2215 |
|
|
buf[idx] = 0;
|
2216 |
|
|
err = idx;
|
2217 |
|
|
|
2218 |
|
|
errout:
|
2219 |
|
|
kfree(tbuf);
|
2220 |
|
|
return err;
|
2221 |
|
|
}
|
2222 |
|
|
|
2223 |
|
|
/*
|
2224 |
|
|
* By the time we get here, the device has gotten a new device ID
|
2225 |
|
|
* and is in the default state. We need to identify the thing and
|
2226 |
|
|
* get the ball rolling..
|
2227 |
|
|
*
|
2228 |
|
|
* Returns 0 for success, != 0 for error.
|
2229 |
|
|
*/
|
2230 |
|
|
int usb_new_device(struct usb_device *dev)
|
2231 |
|
|
{
|
2232 |
|
|
int err;
|
2233 |
|
|
|
2234 |
|
|
/* USB v1.1 5.5.3 */
|
2235 |
|
|
/* We read the first 8 bytes from the device descriptor to get to */
|
2236 |
|
|
/* the bMaxPacketSize0 field. Then we set the maximum packet size */
|
2237 |
|
|
/* for the control pipe, and retrieve the rest */
|
2238 |
|
|
dev->epmaxpacketin [0] = 8;
|
2239 |
|
|
dev->epmaxpacketout[0] = 8;
|
2240 |
|
|
|
2241 |
|
|
err = usb_set_address(dev);
|
2242 |
|
|
if (err < 0) {
|
2243 |
|
|
err("USB device not accepting new address=%d (error=%d)",
|
2244 |
|
|
dev->devnum, err);
|
2245 |
|
|
clear_bit(dev->devnum, &dev->bus->devmap.devicemap);
|
2246 |
|
|
dev->devnum = -1;
|
2247 |
|
|
return 1;
|
2248 |
|
|
}
|
2249 |
|
|
|
2250 |
|
|
wait_ms(10); /* Let the SET_ADDRESS settle */
|
2251 |
|
|
|
2252 |
|
|
err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
|
2253 |
|
|
if (err < 8) {
|
2254 |
|
|
if (err < 0)
|
2255 |
|
|
err("USB device not responding, giving up (error=%d)", err);
|
2256 |
|
|
else
|
2257 |
|
|
err("USB device descriptor short read (expected %i, got %i)", 8, err);
|
2258 |
|
|
clear_bit(dev->devnum, &dev->bus->devmap.devicemap);
|
2259 |
|
|
dev->devnum = -1;
|
2260 |
|
|
return 1;
|
2261 |
|
|
}
|
2262 |
|
|
dev->epmaxpacketin [0] = dev->descriptor.bMaxPacketSize0;
|
2263 |
|
|
dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
|
2264 |
|
|
|
2265 |
|
|
err = usb_get_device_descriptor(dev);
|
2266 |
|
|
if (err < (signed)sizeof(dev->descriptor)) {
|
2267 |
|
|
if (err < 0)
|
2268 |
|
|
err("unable to get device descriptor (error=%d)", err);
|
2269 |
|
|
else
|
2270 |
|
|
err("USB device descriptor short read (expected %Zi, got %i)",
|
2271 |
|
|
sizeof(dev->descriptor), err);
|
2272 |
|
|
|
2273 |
|
|
clear_bit(dev->devnum, &dev->bus->devmap.devicemap);
|
2274 |
|
|
dev->devnum = -1;
|
2275 |
|
|
return 1;
|
2276 |
|
|
}
|
2277 |
|
|
|
2278 |
|
|
err = usb_get_configuration(dev);
|
2279 |
|
|
if (err < 0) {
|
2280 |
|
|
err("unable to get device %d configuration (error=%d)",
|
2281 |
|
|
dev->devnum, err);
|
2282 |
|
|
clear_bit(dev->devnum, &dev->bus->devmap.devicemap);
|
2283 |
|
|
dev->devnum = -1;
|
2284 |
|
|
return 1;
|
2285 |
|
|
}
|
2286 |
|
|
|
2287 |
|
|
/* we set the default configuration here */
|
2288 |
|
|
err = usb_set_configuration(dev, dev->config[0].bConfigurationValue);
|
2289 |
|
|
if (err) {
|
2290 |
|
|
err("failed to set device %d default configuration (error=%d)",
|
2291 |
|
|
dev->devnum, err);
|
2292 |
|
|
clear_bit(dev->devnum, &dev->bus->devmap.devicemap);
|
2293 |
|
|
dev->devnum = -1;
|
2294 |
|
|
return 1;
|
2295 |
|
|
}
|
2296 |
|
|
|
2297 |
|
|
dbg("new device strings: Mfr=%d, Product=%d, SerialNumber=%d",
|
2298 |
|
|
dev->descriptor.iManufacturer, dev->descriptor.iProduct, dev->descriptor.iSerialNumber);
|
2299 |
|
|
#ifdef DEBUG
|
2300 |
|
|
if (dev->descriptor.iManufacturer)
|
2301 |
|
|
usb_show_string(dev, "Manufacturer", dev->descriptor.iManufacturer);
|
2302 |
|
|
if (dev->descriptor.iProduct)
|
2303 |
|
|
usb_show_string(dev, "Product", dev->descriptor.iProduct);
|
2304 |
|
|
if (dev->descriptor.iSerialNumber)
|
2305 |
|
|
usb_show_string(dev, "SerialNumber", dev->descriptor.iSerialNumber);
|
2306 |
|
|
#endif
|
2307 |
|
|
|
2308 |
|
|
/* now that the basic setup is over, add a /proc/bus/usb entry */
|
2309 |
|
|
usbdevfs_add_device(dev);
|
2310 |
|
|
|
2311 |
|
|
/* find drivers willing to handle this device */
|
2312 |
|
|
usb_find_drivers(dev);
|
2313 |
|
|
|
2314 |
|
|
/* userspace may load modules and/or configure further */
|
2315 |
|
|
call_policy ("add", dev);
|
2316 |
|
|
|
2317 |
|
|
return 0;
|
2318 |
|
|
}
|
2319 |
|
|
|
2320 |
|
|
static int usb_open(struct inode * inode, struct file * file)
|
2321 |
|
|
{
|
2322 |
|
|
int minor = MINOR(inode->i_rdev);
|
2323 |
|
|
struct usb_driver *c = usb_minors[minor/16];
|
2324 |
|
|
int err = -ENODEV;
|
2325 |
|
|
struct file_operations *old_fops, *new_fops = NULL;
|
2326 |
|
|
|
2327 |
|
|
/*
|
2328 |
|
|
* No load-on-demand? Randy, could you ACK that it's really not
|
2329 |
|
|
* supposed to be done? -- AV
|
2330 |
|
|
*/
|
2331 |
|
|
if (!c || !(new_fops = fops_get(c->fops)))
|
2332 |
|
|
return err;
|
2333 |
|
|
old_fops = file->f_op;
|
2334 |
|
|
file->f_op = new_fops;
|
2335 |
|
|
/* Curiouser and curiouser... NULL ->open() as "no device" ? */
|
2336 |
|
|
if (file->f_op->open)
|
2337 |
|
|
err = file->f_op->open(inode,file);
|
2338 |
|
|
if (err) {
|
2339 |
|
|
fops_put(file->f_op);
|
2340 |
|
|
file->f_op = fops_get(old_fops);
|
2341 |
|
|
}
|
2342 |
|
|
fops_put(old_fops);
|
2343 |
|
|
return err;
|
2344 |
|
|
}
|
2345 |
|
|
|
2346 |
|
|
static struct file_operations usb_fops = {
|
2347 |
|
|
owner: THIS_MODULE,
|
2348 |
|
|
open: usb_open,
|
2349 |
|
|
};
|
2350 |
|
|
|
2351 |
|
|
int usb_major_init(void)
|
2352 |
|
|
{
|
2353 |
|
|
if (devfs_register_chrdev(USB_MAJOR, "usb", &usb_fops)) {
|
2354 |
|
|
err("unable to get major %d for usb devices", USB_MAJOR);
|
2355 |
|
|
return -EBUSY;
|
2356 |
|
|
}
|
2357 |
|
|
|
2358 |
|
|
usb_devfs_handle = devfs_mk_dir(NULL, "usb", NULL);
|
2359 |
|
|
|
2360 |
|
|
return 0;
|
2361 |
|
|
}
|
2362 |
|
|
|
2363 |
|
|
void usb_major_cleanup(void)
|
2364 |
|
|
{
|
2365 |
|
|
devfs_unregister(usb_devfs_handle);
|
2366 |
|
|
devfs_unregister_chrdev(USB_MAJOR, "usb");
|
2367 |
|
|
}
|
2368 |
|
|
|
2369 |
|
|
|
2370 |
|
|
#ifdef CONFIG_PROC_FS
|
2371 |
|
|
struct list_head *usb_driver_get_list(void)
|
2372 |
|
|
{
|
2373 |
|
|
return &usb_driver_list;
|
2374 |
|
|
}
|
2375 |
|
|
|
2376 |
|
|
struct list_head *usb_bus_get_list(void)
|
2377 |
|
|
{
|
2378 |
|
|
return &usb_bus_list;
|
2379 |
|
|
}
|
2380 |
|
|
#endif
|
2381 |
|
|
|
2382 |
|
|
|
2383 |
|
|
/*
|
2384 |
|
|
* Init
|
2385 |
|
|
*/
|
2386 |
|
|
static int __init usb_init(void)
|
2387 |
|
|
{
|
2388 |
|
|
init_MUTEX(&usb_bus_list_lock);
|
2389 |
|
|
usb_major_init();
|
2390 |
|
|
usbdevfs_init();
|
2391 |
|
|
usb_hub_init();
|
2392 |
|
|
|
2393 |
|
|
return 0;
|
2394 |
|
|
}
|
2395 |
|
|
|
2396 |
|
|
/*
|
2397 |
|
|
* Cleanup
|
2398 |
|
|
*/
|
2399 |
|
|
static void __exit usb_exit(void)
|
2400 |
|
|
{
|
2401 |
|
|
usb_major_cleanup();
|
2402 |
|
|
usbdevfs_cleanup();
|
2403 |
|
|
usb_hub_cleanup();
|
2404 |
|
|
}
|
2405 |
|
|
|
2406 |
|
|
module_init(usb_init);
|
2407 |
|
|
module_exit(usb_exit);
|
2408 |
|
|
|
2409 |
|
|
/*
|
2410 |
|
|
* USB may be built into the kernel or be built as modules.
|
2411 |
|
|
* If the USB core [and maybe a host controller driver] is built
|
2412 |
|
|
* into the kernel, and other device drivers are built as modules,
|
2413 |
|
|
* then these symbols need to be exported for the modules to use.
|
2414 |
|
|
*/
|
2415 |
|
|
EXPORT_SYMBOL(usb_ifnum_to_ifpos);
|
2416 |
|
|
EXPORT_SYMBOL(usb_ifnum_to_if);
|
2417 |
|
|
EXPORT_SYMBOL(usb_epnum_to_ep_desc);
|
2418 |
|
|
|
2419 |
|
|
EXPORT_SYMBOL(usb_register);
|
2420 |
|
|
EXPORT_SYMBOL(usb_deregister);
|
2421 |
|
|
EXPORT_SYMBOL(usb_scan_devices);
|
2422 |
|
|
EXPORT_SYMBOL(usb_alloc_bus);
|
2423 |
|
|
EXPORT_SYMBOL(usb_free_bus);
|
2424 |
|
|
EXPORT_SYMBOL(usb_register_bus);
|
2425 |
|
|
EXPORT_SYMBOL(usb_deregister_bus);
|
2426 |
|
|
EXPORT_SYMBOL(usb_alloc_dev);
|
2427 |
|
|
EXPORT_SYMBOL(usb_free_dev);
|
2428 |
|
|
EXPORT_SYMBOL(usb_inc_dev_use);
|
2429 |
|
|
|
2430 |
|
|
EXPORT_SYMBOL(usb_find_interface_driver_for_ifnum);
|
2431 |
|
|
EXPORT_SYMBOL(usb_driver_claim_interface);
|
2432 |
|
|
EXPORT_SYMBOL(usb_interface_claimed);
|
2433 |
|
|
EXPORT_SYMBOL(usb_driver_release_interface);
|
2434 |
|
|
EXPORT_SYMBOL(usb_match_id);
|
2435 |
|
|
|
2436 |
|
|
EXPORT_SYMBOL(usb_root_hub_string);
|
2437 |
|
|
EXPORT_SYMBOL(usb_new_device);
|
2438 |
|
|
EXPORT_SYMBOL(usb_reset_device);
|
2439 |
|
|
EXPORT_SYMBOL(usb_connect);
|
2440 |
|
|
EXPORT_SYMBOL(usb_disconnect);
|
2441 |
|
|
|
2442 |
|
|
EXPORT_SYMBOL(usb_calc_bus_time);
|
2443 |
|
|
EXPORT_SYMBOL(usb_check_bandwidth);
|
2444 |
|
|
EXPORT_SYMBOL(usb_claim_bandwidth);
|
2445 |
|
|
EXPORT_SYMBOL(usb_release_bandwidth);
|
2446 |
|
|
|
2447 |
|
|
EXPORT_SYMBOL(usb_set_address);
|
2448 |
|
|
EXPORT_SYMBOL(usb_get_descriptor);
|
2449 |
|
|
EXPORT_SYMBOL(usb_get_class_descriptor);
|
2450 |
|
|
EXPORT_SYMBOL(__usb_get_extra_descriptor);
|
2451 |
|
|
EXPORT_SYMBOL(usb_get_device_descriptor);
|
2452 |
|
|
EXPORT_SYMBOL(usb_get_string);
|
2453 |
|
|
EXPORT_SYMBOL(usb_string);
|
2454 |
|
|
EXPORT_SYMBOL(usb_get_protocol);
|
2455 |
|
|
EXPORT_SYMBOL(usb_set_protocol);
|
2456 |
|
|
EXPORT_SYMBOL(usb_get_report);
|
2457 |
|
|
EXPORT_SYMBOL(usb_set_report);
|
2458 |
|
|
EXPORT_SYMBOL(usb_set_idle);
|
2459 |
|
|
EXPORT_SYMBOL(usb_clear_halt);
|
2460 |
|
|
EXPORT_SYMBOL(usb_set_interface);
|
2461 |
|
|
EXPORT_SYMBOL(usb_get_configuration);
|
2462 |
|
|
EXPORT_SYMBOL(usb_set_configuration);
|
2463 |
|
|
EXPORT_SYMBOL(usb_get_status);
|
2464 |
|
|
|
2465 |
|
|
EXPORT_SYMBOL(usb_get_current_frame_number);
|
2466 |
|
|
|
2467 |
|
|
EXPORT_SYMBOL(usb_alloc_urb);
|
2468 |
|
|
EXPORT_SYMBOL(usb_free_urb);
|
2469 |
|
|
EXPORT_SYMBOL(usb_submit_urb);
|
2470 |
|
|
EXPORT_SYMBOL(usb_unlink_urb);
|
2471 |
|
|
|
2472 |
|
|
EXPORT_SYMBOL(usb_control_msg);
|
2473 |
|
|
EXPORT_SYMBOL(usb_bulk_msg);
|
2474 |
|
|
|
2475 |
|
|
EXPORT_SYMBOL(usb_devfs_handle);
|
2476 |
|
|
MODULE_LICENSE("GPL");
|