diff options
Diffstat (limited to 'drivers/usb/core/sysfs.c')
| -rw-r--r-- | drivers/usb/core/sysfs.c | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c new file mode 100644 index 000000000000..ec9b3bde8ae5 --- /dev/null +++ b/drivers/usb/core/sysfs.c @@ -0,0 +1,318 @@ +/* + * drivers/usb/core/sysfs.c + * + * (C) Copyright 2002 David Brownell + * (C) Copyright 2002,2004 Greg Kroah-Hartman + * (C) Copyright 2002,2004 IBM Corp. + * + * All of the sysfs file attributes for usb devices and interfaces. + * + */ + + +#include <linux/config.h> +#include <linux/kernel.h> + +#ifdef CONFIG_USB_DEBUG + #define DEBUG +#else + #undef DEBUG +#endif +#include <linux/usb.h> + +#include "usb.h" + +/* Active configuration fields */ +#define usb_actconfig_show(field, multiplier, format_string) \ +static ssize_t show_##field (struct device *dev, char *buf) \ +{ \ + struct usb_device *udev; \ + struct usb_host_config *actconfig; \ + \ + udev = to_usb_device (dev); \ + actconfig = udev->actconfig; \ + if (actconfig) \ + return sprintf (buf, format_string, \ + actconfig->desc.field * multiplier); \ + else \ + return 0; \ +} \ + +#define usb_actconfig_attr(field, multiplier, format_string) \ +usb_actconfig_show(field, multiplier, format_string) \ +static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); + +usb_actconfig_attr (bNumInterfaces, 1, "%2d\n") +usb_actconfig_attr (bmAttributes, 1, "%2x\n") +usb_actconfig_attr (bMaxPower, 2, "%3dmA\n") + +static ssize_t show_configuration_string(struct device *dev, char *buf) +{ + struct usb_device *udev; + struct usb_host_config *actconfig; + int len; + + udev = to_usb_device (dev); + actconfig = udev->actconfig; + if ((!actconfig) || (!actconfig->string)) + return 0; + len = sprintf(buf, actconfig->string, PAGE_SIZE); + if (len < 0) + return 0; + buf[len] = '\n'; + buf[len+1] = 0; + return len+1; +} +static DEVICE_ATTR(configuration, S_IRUGO, show_configuration_string, NULL); + +/* configuration value is always present, and r/w */ +usb_actconfig_show(bConfigurationValue, 1, "%u\n"); + +static ssize_t +set_bConfigurationValue (struct device *dev, const char *buf, size_t count) +{ + struct usb_device *udev = udev = to_usb_device (dev); + int config, value; + + if (sscanf (buf, "%u", &config) != 1 || config > 255) + return -EINVAL; + usb_lock_device(udev); + value = usb_set_configuration (udev, config); + usb_unlock_device(udev); + return (value < 0) ? value : count; +} + +static DEVICE_ATTR(bConfigurationValue, S_IRUGO | S_IWUSR, + show_bConfigurationValue, set_bConfigurationValue); + +/* String fields */ +#define usb_string_attr(name) \ +static ssize_t show_##name(struct device *dev, char *buf) \ +{ \ + struct usb_device *udev; \ + int len; \ + \ + udev = to_usb_device (dev); \ + len = snprintf(buf, 256, "%s", udev->name); \ + if (len < 0) \ + return 0; \ + buf[len] = '\n'; \ + buf[len+1] = 0; \ + return len+1; \ +} \ +static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); + +usb_string_attr(product); +usb_string_attr(manufacturer); +usb_string_attr(serial); + +static ssize_t +show_speed (struct device *dev, char *buf) +{ + struct usb_device *udev; + char *speed; + + udev = to_usb_device (dev); + + switch (udev->speed) { + case USB_SPEED_LOW: + speed = "1.5"; + break; + case USB_SPEED_UNKNOWN: + case USB_SPEED_FULL: + speed = "12"; + break; + case USB_SPEED_HIGH: + speed = "480"; + break; + default: + speed = "unknown"; + } + return sprintf (buf, "%s\n", speed); +} +static DEVICE_ATTR(speed, S_IRUGO, show_speed, NULL); + +static ssize_t +show_devnum (struct device *dev, char *buf) +{ + struct usb_device *udev; + + udev = to_usb_device (dev); + return sprintf (buf, "%d\n", udev->devnum); +} +static DEVICE_ATTR(devnum, S_IRUGO, show_devnum, NULL); + +static ssize_t +show_version (struct device *dev, char *buf) +{ + struct usb_device *udev; + u16 bcdUSB; + + udev = to_usb_device(dev); + bcdUSB = le16_to_cpu(udev->descriptor.bcdUSB); + return sprintf(buf, "%2x.%02x\n", bcdUSB >> 8, bcdUSB & 0xff); +} +static DEVICE_ATTR(version, S_IRUGO, show_version, NULL); + +static ssize_t +show_maxchild (struct device *dev, char *buf) +{ + struct usb_device *udev; + + udev = to_usb_device (dev); + return sprintf (buf, "%d\n", udev->maxchild); +} +static DEVICE_ATTR(maxchild, S_IRUGO, show_maxchild, NULL); + +/* Descriptor fields */ +#define usb_descriptor_attr_le16(field, format_string) \ +static ssize_t \ +show_##field (struct device *dev, char *buf) \ +{ \ + struct usb_device *udev; \ + \ + udev = to_usb_device (dev); \ + return sprintf (buf, format_string, \ + le16_to_cpu(udev->descriptor.field)); \ +} \ +static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); + +usb_descriptor_attr_le16(idVendor, "%04x\n") +usb_descriptor_attr_le16(idProduct, "%04x\n") +usb_descriptor_attr_le16(bcdDevice, "%04x\n") + +#define usb_descriptor_attr(field, format_string) \ +static ssize_t \ +show_##field (struct device *dev, char *buf) \ +{ \ + struct usb_device *udev; \ + \ + udev = to_usb_device (dev); \ + return sprintf (buf, format_string, udev->descriptor.field); \ +} \ +static DEVICE_ATTR(field, S_IRUGO, show_##field, NULL); + +usb_descriptor_attr (bDeviceClass, "%02x\n") +usb_descriptor_attr (bDeviceSubClass, "%02x\n") +usb_descriptor_attr (bDeviceProtocol, "%02x\n") +usb_descriptor_attr (bNumConfigurations, "%d\n") + +static struct attribute *dev_attrs[] = { + /* current configuration's attributes */ + &dev_attr_bNumInterfaces.attr, + &dev_attr_bConfigurationValue.attr, + &dev_attr_bmAttributes.attr, + &dev_attr_bMaxPower.attr, + /* device attributes */ + &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_speed.attr, + &dev_attr_devnum.attr, + &dev_attr_version.attr, + &dev_attr_maxchild.attr, + NULL, +}; +static struct attribute_group dev_attr_grp = { + .attrs = dev_attrs, +}; + +void usb_create_sysfs_dev_files (struct usb_device *udev) +{ + struct device *dev = &udev->dev; + + sysfs_create_group(&dev->kobj, &dev_attr_grp); + + if (udev->manufacturer) + device_create_file (dev, &dev_attr_manufacturer); + if (udev->product) + device_create_file (dev, &dev_attr_product); + if (udev->serial) + device_create_file (dev, &dev_attr_serial); + device_create_file (dev, &dev_attr_configuration); +} + +void usb_remove_sysfs_dev_files (struct usb_device *udev) +{ + struct device *dev = &udev->dev; + + sysfs_remove_group(&dev->kobj, &dev_attr_grp); + + if (udev->descriptor.iManufacturer) + device_remove_file(dev, &dev_attr_manufacturer); + if (udev->descriptor.iProduct) + device_remove_file(dev, &dev_attr_product); + if (udev->descriptor.iSerialNumber) + device_remove_file(dev, &dev_attr_serial); + device_remove_file (dev, &dev_attr_configuration); +} + +/* Interface fields */ +#define usb_intf_attr(field, format_string) \ +static ssize_t \ +show_##field (struct device *dev, 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, char *buf) +{ + struct usb_interface *intf; + struct usb_device *udev; + int len; + + intf = to_usb_interface (dev); + udev = interface_to_usbdev (intf); + len = snprintf(buf, 256, "%s", intf->cur_altsetting->string); + if (len < 0) + return 0; + buf[len] = '\n'; + buf[len+1] = 0; + return len+1; +} +static DEVICE_ATTR(interface, S_IRUGO, show_interface_string, 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, + NULL, +}; +static struct attribute_group intf_attr_grp = { + .attrs = intf_attrs, +}; + +void usb_create_sysfs_intf_files (struct usb_interface *intf) +{ + sysfs_create_group(&intf->dev.kobj, &intf_attr_grp); + + if (intf->cur_altsetting->string) + device_create_file(&intf->dev, &dev_attr_interface); + +} + +void usb_remove_sysfs_intf_files (struct usb_interface *intf) +{ + sysfs_remove_group(&intf->dev.kobj, &intf_attr_grp); + + if (intf->cur_altsetting->string) + device_remove_file(&intf->dev, &dev_attr_interface); + +} |