![Alan Stern](/assets/img/avatar_default.png)
This patch (as1303) revises the USB Power Management infrastructure to make it compatible with the new driver-model Runtime PM framework: Drivers are no longer allowed to access intf->pm_usage_cnt directly; the PM framework manages its own usage counters. usb_autopm_set_interface() is eliminated, because it directly sets intf->pm_usage_cnt. usb_autopm_enable() and usb_autopm_disable() are eliminated, because they call usb_autopm_set_interface(). usb_autopm_get_interface_no_resume() and usb_autopm_put_interface_no_suspend() are added. They correspond to pm_runtime_get_noresume() and pm_runtime_put_noidle() in the PM framework. The power/level attribute no longer accepts "suspend", only "on" and "auto". The PM framework doesn't allow devices to be forced into a suspended mode. The hub driver contains the only code that violates the new guidelines. It is updated to use the new interface routines instead. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
851 lines
22 KiB
C
851 lines
22 KiB
C
/*
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* drivers/usb/core/sysfs.c
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*
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* (C) Copyright 2002 David Brownell
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* (C) Copyright 2002,2004 Greg Kroah-Hartman
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* (C) Copyright 2002,2004 IBM Corp.
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*
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* All of the sysfs file attributes for usb devices and interfaces.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/usb.h>
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#include <linux/usb/quirks.h>
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#include "usb.h"
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/* Active configuration fields */
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#define usb_actconfig_show(field, multiplier, format_string) \
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static ssize_t show_##field(struct device *dev, \
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struct device_attribute *attr, char *buf) \
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{ \
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struct usb_device *udev; \
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struct usb_host_config *actconfig; \
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\
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udev = to_usb_device(dev); \
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actconfig = udev->actconfig; \
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if (actconfig) \
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return sprintf(buf, format_string, \
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actconfig->desc.field * multiplier); \
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else \
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return 0; \
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} \
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#define usb_actconfig_attr(field, multiplier, format_string) \
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usb_actconfig_show(field, multiplier, format_string) \
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static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
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usb_actconfig_attr(bNumInterfaces, 1, "%2d\n")
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usb_actconfig_attr(bmAttributes, 1, "%2x\n")
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usb_actconfig_attr(bMaxPower, 2, "%3dmA\n")
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static ssize_t show_configuration_string(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct usb_device *udev;
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struct usb_host_config *actconfig;
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udev = to_usb_device(dev);
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actconfig = udev->actconfig;
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if ((!actconfig) || (!actconfig->string))
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return 0;
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return sprintf(buf, "%s\n", actconfig->string);
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}
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static DEVICE_ATTR(configuration, S_IRUGO, show_configuration_string, NULL);
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/* configuration value is always present, and r/w */
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usb_actconfig_show(bConfigurationValue, 1, "%u\n");
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static ssize_t
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set_bConfigurationValue(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct usb_device *udev = to_usb_device(dev);
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int config, value;
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if (sscanf(buf, "%d", &config) != 1 || config < -1 || config > 255)
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return -EINVAL;
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usb_lock_device(udev);
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value = usb_set_configuration(udev, config);
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usb_unlock_device(udev);
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return (value < 0) ? value : count;
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}
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static DEVICE_ATTR(bConfigurationValue, S_IRUGO | S_IWUSR,
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show_bConfigurationValue, set_bConfigurationValue);
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/* String fields */
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#define usb_string_attr(name) \
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static ssize_t show_##name(struct device *dev, \
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struct device_attribute *attr, char *buf) \
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{ \
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struct usb_device *udev; \
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\
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udev = to_usb_device(dev); \
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return sprintf(buf, "%s\n", udev->name); \
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} \
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static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL);
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usb_string_attr(product);
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usb_string_attr(manufacturer);
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usb_string_attr(serial);
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static ssize_t
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show_speed(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_device *udev;
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char *speed;
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udev = to_usb_device(dev);
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switch (udev->speed) {
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case USB_SPEED_LOW:
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speed = "1.5";
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break;
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case USB_SPEED_UNKNOWN:
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case USB_SPEED_FULL:
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speed = "12";
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break;
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case USB_SPEED_HIGH:
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speed = "480";
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break;
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default:
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speed = "unknown";
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}
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return sprintf(buf, "%s\n", speed);
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}
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static DEVICE_ATTR(speed, S_IRUGO, show_speed, NULL);
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static ssize_t
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show_busnum(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_device *udev;
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udev = to_usb_device(dev);
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return sprintf(buf, "%d\n", udev->bus->busnum);
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}
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static DEVICE_ATTR(busnum, S_IRUGO, show_busnum, NULL);
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static ssize_t
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show_devnum(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_device *udev;
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udev = to_usb_device(dev);
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return sprintf(buf, "%d\n", udev->devnum);
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}
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static DEVICE_ATTR(devnum, S_IRUGO, show_devnum, NULL);
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static ssize_t
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show_devpath(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_device *udev;
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udev = to_usb_device(dev);
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return sprintf(buf, "%s\n", udev->devpath);
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}
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static DEVICE_ATTR(devpath, S_IRUGO, show_devpath, NULL);
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static ssize_t
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show_version(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_device *udev;
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u16 bcdUSB;
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udev = to_usb_device(dev);
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bcdUSB = le16_to_cpu(udev->descriptor.bcdUSB);
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return sprintf(buf, "%2x.%02x\n", bcdUSB >> 8, bcdUSB & 0xff);
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}
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static DEVICE_ATTR(version, S_IRUGO, show_version, NULL);
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static ssize_t
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show_maxchild(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_device *udev;
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udev = to_usb_device(dev);
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return sprintf(buf, "%d\n", udev->maxchild);
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}
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static DEVICE_ATTR(maxchild, S_IRUGO, show_maxchild, NULL);
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static ssize_t
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show_quirks(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_device *udev;
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udev = to_usb_device(dev);
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return sprintf(buf, "0x%x\n", udev->quirks);
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}
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static DEVICE_ATTR(quirks, S_IRUGO, show_quirks, NULL);
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static ssize_t
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show_urbnum(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_device *udev;
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udev = to_usb_device(dev);
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return sprintf(buf, "%d\n", atomic_read(&udev->urbnum));
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}
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static DEVICE_ATTR(urbnum, S_IRUGO, show_urbnum, NULL);
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#ifdef CONFIG_PM
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static const char power_group[] = "power";
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static ssize_t
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show_persist(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_device *udev = to_usb_device(dev);
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return sprintf(buf, "%d\n", udev->persist_enabled);
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}
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static ssize_t
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set_persist(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct usb_device *udev = to_usb_device(dev);
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int value;
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/* Hubs are always enabled for USB_PERSIST */
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if (udev->descriptor.bDeviceClass == USB_CLASS_HUB)
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return -EPERM;
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if (sscanf(buf, "%d", &value) != 1)
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return -EINVAL;
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usb_pm_lock(udev);
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udev->persist_enabled = !!value;
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usb_pm_unlock(udev);
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return count;
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}
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static DEVICE_ATTR(persist, S_IRUGO | S_IWUSR, show_persist, set_persist);
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static int add_persist_attributes(struct device *dev)
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{
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int rc = 0;
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if (is_usb_device(dev)) {
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struct usb_device *udev = to_usb_device(dev);
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/* Hubs are automatically enabled for USB_PERSIST,
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* no point in creating the attribute file.
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*/
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if (udev->descriptor.bDeviceClass != USB_CLASS_HUB)
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rc = sysfs_add_file_to_group(&dev->kobj,
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&dev_attr_persist.attr,
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power_group);
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}
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return rc;
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}
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static void remove_persist_attributes(struct device *dev)
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{
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sysfs_remove_file_from_group(&dev->kobj,
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&dev_attr_persist.attr,
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power_group);
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}
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#else
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#define add_persist_attributes(dev) 0
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#define remove_persist_attributes(dev) do {} while (0)
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#endif /* CONFIG_PM */
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#ifdef CONFIG_USB_SUSPEND
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static ssize_t
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show_connected_duration(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct usb_device *udev = to_usb_device(dev);
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return sprintf(buf, "%u\n",
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jiffies_to_msecs(jiffies - udev->connect_time));
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}
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static DEVICE_ATTR(connected_duration, S_IRUGO, show_connected_duration, NULL);
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/*
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* If the device is resumed, the last time the device was suspended has
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* been pre-subtracted from active_duration. We add the current time to
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* get the duration that the device was actually active.
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*
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* If the device is suspended, the active_duration is up-to-date.
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*/
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static ssize_t
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show_active_duration(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct usb_device *udev = to_usb_device(dev);
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int duration;
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if (udev->state != USB_STATE_SUSPENDED)
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duration = jiffies_to_msecs(jiffies + udev->active_duration);
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else
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duration = jiffies_to_msecs(udev->active_duration);
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return sprintf(buf, "%u\n", duration);
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}
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static DEVICE_ATTR(active_duration, S_IRUGO, show_active_duration, NULL);
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static ssize_t
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show_autosuspend(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_device *udev = to_usb_device(dev);
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return sprintf(buf, "%d\n", udev->autosuspend_delay / HZ);
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}
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static ssize_t
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set_autosuspend(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct usb_device *udev = to_usb_device(dev);
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int value;
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if (sscanf(buf, "%d", &value) != 1 || value >= INT_MAX/HZ ||
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value <= - INT_MAX/HZ)
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return -EINVAL;
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value *= HZ;
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udev->autosuspend_delay = value;
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if (value >= 0)
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usb_try_autosuspend_device(udev);
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else {
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if (usb_autoresume_device(udev) == 0)
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usb_autosuspend_device(udev);
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}
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return count;
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}
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static DEVICE_ATTR(autosuspend, S_IRUGO | S_IWUSR,
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show_autosuspend, set_autosuspend);
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static const char on_string[] = "on";
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static const char auto_string[] = "auto";
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static ssize_t
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show_level(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct usb_device *udev = to_usb_device(dev);
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const char *p = auto_string;
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if (udev->state != USB_STATE_SUSPENDED && udev->autosuspend_disabled)
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p = on_string;
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return sprintf(buf, "%s\n", p);
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}
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static ssize_t
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set_level(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct usb_device *udev = to_usb_device(dev);
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int len = count;
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char *cp;
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int rc = 0;
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int old_autosuspend_disabled;
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cp = memchr(buf, '\n', count);
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if (cp)
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len = cp - buf;
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usb_lock_device(udev);
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old_autosuspend_disabled = udev->autosuspend_disabled;
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/* Setting the flags without calling usb_pm_lock is a subject to
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* races, but who cares...
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*/
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if (len == sizeof on_string - 1 &&
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strncmp(buf, on_string, len) == 0) {
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udev->autosuspend_disabled = 1;
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rc = usb_external_resume_device(udev, PMSG_USER_RESUME);
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} else if (len == sizeof auto_string - 1 &&
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strncmp(buf, auto_string, len) == 0) {
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udev->autosuspend_disabled = 0;
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rc = usb_external_resume_device(udev, PMSG_USER_RESUME);
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} else
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rc = -EINVAL;
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if (rc)
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udev->autosuspend_disabled = old_autosuspend_disabled;
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usb_unlock_device(udev);
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return (rc < 0 ? rc : count);
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}
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static DEVICE_ATTR(level, S_IRUGO | S_IWUSR, show_level, set_level);
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static int add_power_attributes(struct device *dev)
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{
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int rc = 0;
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if (is_usb_device(dev)) {
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rc = sysfs_add_file_to_group(&dev->kobj,
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&dev_attr_autosuspend.attr,
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power_group);
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if (rc == 0)
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rc = sysfs_add_file_to_group(&dev->kobj,
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&dev_attr_level.attr,
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power_group);
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if (rc == 0)
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rc = sysfs_add_file_to_group(&dev->kobj,
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&dev_attr_connected_duration.attr,
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power_group);
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if (rc == 0)
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rc = sysfs_add_file_to_group(&dev->kobj,
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&dev_attr_active_duration.attr,
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power_group);
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}
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return rc;
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}
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static void remove_power_attributes(struct device *dev)
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{
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sysfs_remove_file_from_group(&dev->kobj,
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&dev_attr_active_duration.attr,
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power_group);
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sysfs_remove_file_from_group(&dev->kobj,
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&dev_attr_connected_duration.attr,
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power_group);
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sysfs_remove_file_from_group(&dev->kobj,
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&dev_attr_level.attr,
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power_group);
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sysfs_remove_file_from_group(&dev->kobj,
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&dev_attr_autosuspend.attr,
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power_group);
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}
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#else
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#define add_power_attributes(dev) 0
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#define remove_power_attributes(dev) do {} while (0)
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#endif /* CONFIG_USB_SUSPEND */
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/* Descriptor fields */
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#define usb_descriptor_attr_le16(field, format_string) \
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static ssize_t \
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show_##field(struct device *dev, struct device_attribute *attr, \
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char *buf) \
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{ \
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struct usb_device *udev; \
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\
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udev = to_usb_device(dev); \
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return sprintf(buf, format_string, \
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le16_to_cpu(udev->descriptor.field)); \
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} \
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static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
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usb_descriptor_attr_le16(idVendor, "%04x\n")
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usb_descriptor_attr_le16(idProduct, "%04x\n")
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usb_descriptor_attr_le16(bcdDevice, "%04x\n")
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#define usb_descriptor_attr(field, format_string) \
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static ssize_t \
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show_##field(struct device *dev, struct device_attribute *attr, \
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char *buf) \
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{ \
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struct usb_device *udev; \
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\
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udev = to_usb_device(dev); \
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return sprintf(buf, format_string, udev->descriptor.field); \
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} \
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static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
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usb_descriptor_attr(bDeviceClass, "%02x\n")
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usb_descriptor_attr(bDeviceSubClass, "%02x\n")
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usb_descriptor_attr(bDeviceProtocol, "%02x\n")
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usb_descriptor_attr(bNumConfigurations, "%d\n")
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usb_descriptor_attr(bMaxPacketSize0, "%d\n")
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/* show if the device is authorized (1) or not (0) */
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static ssize_t usb_dev_authorized_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct usb_device *usb_dev = to_usb_device(dev);
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return snprintf(buf, PAGE_SIZE, "%u\n", usb_dev->authorized);
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}
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/*
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* Authorize a device to be used in the system
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*
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* Writing a 0 deauthorizes the device, writing a 1 authorizes it.
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*/
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static ssize_t usb_dev_authorized_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t size)
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{
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ssize_t result;
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struct usb_device *usb_dev = to_usb_device(dev);
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unsigned val;
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result = sscanf(buf, "%u\n", &val);
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if (result != 1)
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result = -EINVAL;
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else if (val == 0)
|
|
result = usb_deauthorize_device(usb_dev);
|
|
else
|
|
result = usb_authorize_device(usb_dev);
|
|
return result < 0? result : size;
|
|
}
|
|
|
|
static DEVICE_ATTR(authorized, 0644,
|
|
usb_dev_authorized_show, usb_dev_authorized_store);
|
|
|
|
/* "Safely remove a device" */
|
|
static ssize_t usb_remove_store(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct usb_device *udev = to_usb_device(dev);
|
|
int rc = 0;
|
|
|
|
usb_lock_device(udev);
|
|
if (udev->state != USB_STATE_NOTATTACHED) {
|
|
|
|
/* To avoid races, first unconfigure and then remove */
|
|
usb_set_configuration(udev, -1);
|
|
rc = usb_remove_device(udev);
|
|
}
|
|
if (rc == 0)
|
|
rc = count;
|
|
usb_unlock_device(udev);
|
|
return rc;
|
|
}
|
|
static DEVICE_ATTR(remove, 0200, NULL, usb_remove_store);
|
|
|
|
|
|
static struct attribute *dev_attrs[] = {
|
|
/* current configuration's attributes */
|
|
&dev_attr_configuration.attr,
|
|
&dev_attr_bNumInterfaces.attr,
|
|
&dev_attr_bConfigurationValue.attr,
|
|
&dev_attr_bmAttributes.attr,
|
|
&dev_attr_bMaxPower.attr,
|
|
/* device attributes */
|
|
&dev_attr_urbnum.attr,
|
|
&dev_attr_idVendor.attr,
|
|
&dev_attr_idProduct.attr,
|
|
&dev_attr_bcdDevice.attr,
|
|
&dev_attr_bDeviceClass.attr,
|
|
&dev_attr_bDeviceSubClass.attr,
|
|
&dev_attr_bDeviceProtocol.attr,
|
|
&dev_attr_bNumConfigurations.attr,
|
|
&dev_attr_bMaxPacketSize0.attr,
|
|
&dev_attr_speed.attr,
|
|
&dev_attr_busnum.attr,
|
|
&dev_attr_devnum.attr,
|
|
&dev_attr_devpath.attr,
|
|
&dev_attr_version.attr,
|
|
&dev_attr_maxchild.attr,
|
|
&dev_attr_quirks.attr,
|
|
&dev_attr_authorized.attr,
|
|
&dev_attr_remove.attr,
|
|
NULL,
|
|
};
|
|
static struct attribute_group dev_attr_grp = {
|
|
.attrs = dev_attrs,
|
|
};
|
|
|
|
/* When modifying this list, be sure to modify dev_string_attrs_are_visible()
|
|
* accordingly.
|
|
*/
|
|
static struct attribute *dev_string_attrs[] = {
|
|
&dev_attr_manufacturer.attr,
|
|
&dev_attr_product.attr,
|
|
&dev_attr_serial.attr,
|
|
NULL
|
|
};
|
|
|
|
static mode_t dev_string_attrs_are_visible(struct kobject *kobj,
|
|
struct attribute *a, int n)
|
|
{
|
|
struct device *dev = container_of(kobj, struct device, kobj);
|
|
struct usb_device *udev = to_usb_device(dev);
|
|
|
|
if (a == &dev_attr_manufacturer.attr) {
|
|
if (udev->manufacturer == NULL)
|
|
return 0;
|
|
} else if (a == &dev_attr_product.attr) {
|
|
if (udev->product == NULL)
|
|
return 0;
|
|
} else if (a == &dev_attr_serial.attr) {
|
|
if (udev->serial == NULL)
|
|
return 0;
|
|
}
|
|
return a->mode;
|
|
}
|
|
|
|
static struct attribute_group dev_string_attr_grp = {
|
|
.attrs = dev_string_attrs,
|
|
.is_visible = dev_string_attrs_are_visible,
|
|
};
|
|
|
|
const struct attribute_group *usb_device_groups[] = {
|
|
&dev_attr_grp,
|
|
&dev_string_attr_grp,
|
|
NULL
|
|
};
|
|
|
|
/* Binary descriptors */
|
|
|
|
static ssize_t
|
|
read_descriptors(struct kobject *kobj, struct bin_attribute *attr,
|
|
char *buf, loff_t off, size_t count)
|
|
{
|
|
struct device *dev = container_of(kobj, struct device, kobj);
|
|
struct usb_device *udev = to_usb_device(dev);
|
|
size_t nleft = count;
|
|
size_t srclen, n;
|
|
int cfgno;
|
|
void *src;
|
|
|
|
/* The binary attribute begins with the device descriptor.
|
|
* Following that are the raw descriptor entries for all the
|
|
* configurations (config plus subsidiary descriptors).
|
|
*/
|
|
for (cfgno = -1; cfgno < udev->descriptor.bNumConfigurations &&
|
|
nleft > 0; ++cfgno) {
|
|
if (cfgno < 0) {
|
|
src = &udev->descriptor;
|
|
srclen = sizeof(struct usb_device_descriptor);
|
|
} else {
|
|
src = udev->rawdescriptors[cfgno];
|
|
srclen = __le16_to_cpu(udev->config[cfgno].desc.
|
|
wTotalLength);
|
|
}
|
|
if (off < srclen) {
|
|
n = min(nleft, srclen - (size_t) off);
|
|
memcpy(buf, src + off, n);
|
|
nleft -= n;
|
|
buf += n;
|
|
off = 0;
|
|
} else {
|
|
off -= srclen;
|
|
}
|
|
}
|
|
return count - nleft;
|
|
}
|
|
|
|
static struct bin_attribute dev_bin_attr_descriptors = {
|
|
.attr = {.name = "descriptors", .mode = 0444},
|
|
.read = read_descriptors,
|
|
.size = 18 + 65535, /* dev descr + max-size raw descriptor */
|
|
};
|
|
|
|
int usb_create_sysfs_dev_files(struct usb_device *udev)
|
|
{
|
|
struct device *dev = &udev->dev;
|
|
int retval;
|
|
|
|
retval = device_create_bin_file(dev, &dev_bin_attr_descriptors);
|
|
if (retval)
|
|
goto error;
|
|
|
|
retval = add_persist_attributes(dev);
|
|
if (retval)
|
|
goto error;
|
|
|
|
retval = add_power_attributes(dev);
|
|
if (retval)
|
|
goto error;
|
|
return retval;
|
|
error:
|
|
usb_remove_sysfs_dev_files(udev);
|
|
return retval;
|
|
}
|
|
|
|
void usb_remove_sysfs_dev_files(struct usb_device *udev)
|
|
{
|
|
struct device *dev = &udev->dev;
|
|
|
|
remove_power_attributes(dev);
|
|
remove_persist_attributes(dev);
|
|
device_remove_bin_file(dev, &dev_bin_attr_descriptors);
|
|
}
|
|
|
|
/* Interface Accociation Descriptor fields */
|
|
#define usb_intf_assoc_attr(field, format_string) \
|
|
static ssize_t \
|
|
show_iad_##field(struct device *dev, struct device_attribute *attr, \
|
|
char *buf) \
|
|
{ \
|
|
struct usb_interface *intf = to_usb_interface(dev); \
|
|
\
|
|
return sprintf(buf, format_string, \
|
|
intf->intf_assoc->field); \
|
|
} \
|
|
static DEVICE_ATTR(iad_##field, S_IRUGO, show_iad_##field, NULL);
|
|
|
|
usb_intf_assoc_attr(bFirstInterface, "%02x\n")
|
|
usb_intf_assoc_attr(bInterfaceCount, "%02d\n")
|
|
usb_intf_assoc_attr(bFunctionClass, "%02x\n")
|
|
usb_intf_assoc_attr(bFunctionSubClass, "%02x\n")
|
|
usb_intf_assoc_attr(bFunctionProtocol, "%02x\n")
|
|
|
|
/* Interface fields */
|
|
#define usb_intf_attr(field, format_string) \
|
|
static ssize_t \
|
|
show_##field(struct device *dev, struct device_attribute *attr, \
|
|
char *buf) \
|
|
{ \
|
|
struct usb_interface *intf = to_usb_interface(dev); \
|
|
\
|
|
return sprintf(buf, format_string, \
|
|
intf->cur_altsetting->desc.field); \
|
|
} \
|
|
static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
|
|
|
|
usb_intf_attr(bInterfaceNumber, "%02x\n")
|
|
usb_intf_attr(bAlternateSetting, "%2d\n")
|
|
usb_intf_attr(bNumEndpoints, "%02x\n")
|
|
usb_intf_attr(bInterfaceClass, "%02x\n")
|
|
usb_intf_attr(bInterfaceSubClass, "%02x\n")
|
|
usb_intf_attr(bInterfaceProtocol, "%02x\n")
|
|
|
|
static ssize_t show_interface_string(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct usb_interface *intf;
|
|
char *string;
|
|
|
|
intf = to_usb_interface(dev);
|
|
string = intf->cur_altsetting->string;
|
|
barrier(); /* The altsetting might change! */
|
|
|
|
if (!string)
|
|
return 0;
|
|
return sprintf(buf, "%s\n", string);
|
|
}
|
|
static DEVICE_ATTR(interface, S_IRUGO, show_interface_string, NULL);
|
|
|
|
static ssize_t show_modalias(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct usb_interface *intf;
|
|
struct usb_device *udev;
|
|
struct usb_host_interface *alt;
|
|
|
|
intf = to_usb_interface(dev);
|
|
udev = interface_to_usbdev(intf);
|
|
alt = intf->cur_altsetting;
|
|
|
|
return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02X"
|
|
"ic%02Xisc%02Xip%02X\n",
|
|
le16_to_cpu(udev->descriptor.idVendor),
|
|
le16_to_cpu(udev->descriptor.idProduct),
|
|
le16_to_cpu(udev->descriptor.bcdDevice),
|
|
udev->descriptor.bDeviceClass,
|
|
udev->descriptor.bDeviceSubClass,
|
|
udev->descriptor.bDeviceProtocol,
|
|
alt->desc.bInterfaceClass,
|
|
alt->desc.bInterfaceSubClass,
|
|
alt->desc.bInterfaceProtocol);
|
|
}
|
|
static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL);
|
|
|
|
static ssize_t show_supports_autosuspend(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct usb_interface *intf;
|
|
struct usb_device *udev;
|
|
int ret;
|
|
|
|
intf = to_usb_interface(dev);
|
|
udev = interface_to_usbdev(intf);
|
|
|
|
usb_lock_device(udev);
|
|
/* Devices will be autosuspended even when an interface isn't claimed */
|
|
if (!intf->dev.driver ||
|
|
to_usb_driver(intf->dev.driver)->supports_autosuspend)
|
|
ret = sprintf(buf, "%u\n", 1);
|
|
else
|
|
ret = sprintf(buf, "%u\n", 0);
|
|
usb_unlock_device(udev);
|
|
|
|
return ret;
|
|
}
|
|
static DEVICE_ATTR(supports_autosuspend, S_IRUGO, show_supports_autosuspend, NULL);
|
|
|
|
static struct attribute *intf_attrs[] = {
|
|
&dev_attr_bInterfaceNumber.attr,
|
|
&dev_attr_bAlternateSetting.attr,
|
|
&dev_attr_bNumEndpoints.attr,
|
|
&dev_attr_bInterfaceClass.attr,
|
|
&dev_attr_bInterfaceSubClass.attr,
|
|
&dev_attr_bInterfaceProtocol.attr,
|
|
&dev_attr_modalias.attr,
|
|
&dev_attr_supports_autosuspend.attr,
|
|
NULL,
|
|
};
|
|
static struct attribute_group intf_attr_grp = {
|
|
.attrs = intf_attrs,
|
|
};
|
|
|
|
static struct attribute *intf_assoc_attrs[] = {
|
|
&dev_attr_iad_bFirstInterface.attr,
|
|
&dev_attr_iad_bInterfaceCount.attr,
|
|
&dev_attr_iad_bFunctionClass.attr,
|
|
&dev_attr_iad_bFunctionSubClass.attr,
|
|
&dev_attr_iad_bFunctionProtocol.attr,
|
|
NULL,
|
|
};
|
|
|
|
static mode_t intf_assoc_attrs_are_visible(struct kobject *kobj,
|
|
struct attribute *a, int n)
|
|
{
|
|
struct device *dev = container_of(kobj, struct device, kobj);
|
|
struct usb_interface *intf = to_usb_interface(dev);
|
|
|
|
if (intf->intf_assoc == NULL)
|
|
return 0;
|
|
return a->mode;
|
|
}
|
|
|
|
static struct attribute_group intf_assoc_attr_grp = {
|
|
.attrs = intf_assoc_attrs,
|
|
.is_visible = intf_assoc_attrs_are_visible,
|
|
};
|
|
|
|
const struct attribute_group *usb_interface_groups[] = {
|
|
&intf_attr_grp,
|
|
&intf_assoc_attr_grp,
|
|
NULL
|
|
};
|
|
|
|
int usb_create_sysfs_intf_files(struct usb_interface *intf)
|
|
{
|
|
struct usb_device *udev = interface_to_usbdev(intf);
|
|
struct usb_host_interface *alt = intf->cur_altsetting;
|
|
int retval;
|
|
|
|
if (intf->sysfs_files_created || intf->unregistering)
|
|
return 0;
|
|
|
|
if (alt->string == NULL &&
|
|
!(udev->quirks & USB_QUIRK_CONFIG_INTF_STRINGS))
|
|
alt->string = usb_cache_string(udev, alt->desc.iInterface);
|
|
if (alt->string)
|
|
retval = device_create_file(&intf->dev, &dev_attr_interface);
|
|
intf->sysfs_files_created = 1;
|
|
return 0;
|
|
}
|
|
|
|
void usb_remove_sysfs_intf_files(struct usb_interface *intf)
|
|
{
|
|
if (!intf->sysfs_files_created)
|
|
return;
|
|
|
|
device_remove_file(&intf->dev, &dev_attr_interface);
|
|
intf->sysfs_files_created = 0;
|
|
}
|