319 lines
8.2 KiB
C
319 lines
8.2 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/config.h>
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#include <linux/kernel.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 "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, 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, 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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int len;
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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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len = sprintf(buf, actconfig->string, PAGE_SIZE);
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if (len < 0)
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return 0;
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buf[len] = '\n';
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buf[len+1] = 0;
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return len+1;
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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, const char *buf, size_t count)
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{
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struct usb_device *udev = udev = to_usb_device (dev);
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int config, value;
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if (sscanf (buf, "%u", &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, char *buf) \
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{ \
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struct usb_device *udev; \
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int len; \
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\
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udev = to_usb_device (dev); \
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len = snprintf(buf, 256, "%s", udev->name); \
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if (len < 0) \
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return 0; \
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buf[len] = '\n'; \
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buf[len+1] = 0; \
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return len+1; \
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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, 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_devnum (struct device *dev, 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_version (struct device *dev, 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, 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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/* 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, 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, 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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static struct attribute *dev_attrs[] = {
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/* current configuration's attributes */
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&dev_attr_bNumInterfaces.attr,
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&dev_attr_bConfigurationValue.attr,
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&dev_attr_bmAttributes.attr,
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&dev_attr_bMaxPower.attr,
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/* device attributes */
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&dev_attr_idVendor.attr,
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&dev_attr_idProduct.attr,
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&dev_attr_bcdDevice.attr,
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&dev_attr_bDeviceClass.attr,
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&dev_attr_bDeviceSubClass.attr,
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&dev_attr_bDeviceProtocol.attr,
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&dev_attr_bNumConfigurations.attr,
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&dev_attr_speed.attr,
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&dev_attr_devnum.attr,
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&dev_attr_version.attr,
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&dev_attr_maxchild.attr,
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NULL,
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};
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static struct attribute_group dev_attr_grp = {
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.attrs = dev_attrs,
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};
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void usb_create_sysfs_dev_files (struct usb_device *udev)
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{
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struct device *dev = &udev->dev;
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sysfs_create_group(&dev->kobj, &dev_attr_grp);
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if (udev->manufacturer)
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device_create_file (dev, &dev_attr_manufacturer);
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if (udev->product)
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device_create_file (dev, &dev_attr_product);
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if (udev->serial)
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device_create_file (dev, &dev_attr_serial);
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device_create_file (dev, &dev_attr_configuration);
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}
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void usb_remove_sysfs_dev_files (struct usb_device *udev)
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{
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struct device *dev = &udev->dev;
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sysfs_remove_group(&dev->kobj, &dev_attr_grp);
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if (udev->descriptor.iManufacturer)
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device_remove_file(dev, &dev_attr_manufacturer);
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if (udev->descriptor.iProduct)
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device_remove_file(dev, &dev_attr_product);
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if (udev->descriptor.iSerialNumber)
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device_remove_file(dev, &dev_attr_serial);
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device_remove_file (dev, &dev_attr_configuration);
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}
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/* Interface fields */
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#define usb_intf_attr(field, format_string) \
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static ssize_t \
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show_##field (struct device *dev, char *buf) \
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{ \
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struct usb_interface *intf = to_usb_interface (dev); \
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\
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return sprintf (buf, format_string, intf->cur_altsetting->desc.field); \
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} \
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static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL);
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usb_intf_attr (bInterfaceNumber, "%02x\n")
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usb_intf_attr (bAlternateSetting, "%2d\n")
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usb_intf_attr (bNumEndpoints, "%02x\n")
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usb_intf_attr (bInterfaceClass, "%02x\n")
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usb_intf_attr (bInterfaceSubClass, "%02x\n")
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usb_intf_attr (bInterfaceProtocol, "%02x\n")
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static ssize_t show_interface_string(struct device *dev, char *buf)
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{
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struct usb_interface *intf;
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struct usb_device *udev;
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int len;
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intf = to_usb_interface (dev);
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udev = interface_to_usbdev (intf);
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len = snprintf(buf, 256, "%s", intf->cur_altsetting->string);
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if (len < 0)
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return 0;
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buf[len] = '\n';
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buf[len+1] = 0;
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return len+1;
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}
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static DEVICE_ATTR(interface, S_IRUGO, show_interface_string, NULL);
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static struct attribute *intf_attrs[] = {
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&dev_attr_bInterfaceNumber.attr,
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&dev_attr_bAlternateSetting.attr,
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&dev_attr_bNumEndpoints.attr,
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&dev_attr_bInterfaceClass.attr,
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&dev_attr_bInterfaceSubClass.attr,
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&dev_attr_bInterfaceProtocol.attr,
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NULL,
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};
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static struct attribute_group intf_attr_grp = {
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.attrs = intf_attrs,
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};
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void usb_create_sysfs_intf_files (struct usb_interface *intf)
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{
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sysfs_create_group(&intf->dev.kobj, &intf_attr_grp);
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if (intf->cur_altsetting->string)
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device_create_file(&intf->dev, &dev_attr_interface);
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}
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void usb_remove_sysfs_intf_files (struct usb_interface *intf)
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{
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sysfs_remove_group(&intf->dev.kobj, &intf_attr_grp);
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if (intf->cur_altsetting->string)
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device_remove_file(&intf->dev, &dev_attr_interface);
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}
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