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- /*
- * 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"
- /* endpoint stuff */
- struct endpoint_attribute {
- struct device_attribute dev_attr;
- struct usb_endpoint_descriptor *endpoint;
- struct usb_device *udev;
- };
- #define to_endpoint_attr(_dev_attr) \
- container_of(_dev_attr, struct endpoint_attribute, dev_attr)
- #define usb_ep_attr(field, format_string) \
- static ssize_t show_ep_##field(struct device *dev, struct device_attribute *attr, \
- char *buf) \
- { \
- struct endpoint_attribute *endpoint_attr = to_endpoint_attr(attr); \
- \
- return sprintf(buf, format_string, endpoint_attr->endpoint->field); \
- }
- usb_ep_attr(bLength, "%02x\n")
- usb_ep_attr(bDescriptorType, "%02x\n")
- usb_ep_attr(bEndpointAddress, "%02x\n")
- usb_ep_attr(bmAttributes, "%02x\n")
- usb_ep_attr(bInterval, "%02x\n")
- static ssize_t show_ep_wMaxPacketSize(struct device *dev,
- struct device_attribute *attr, char *buf)
- {
- struct endpoint_attribute *endpoint_attr = to_endpoint_attr(attr);
- return sprintf(buf, "%04x\n",
- le16_to_cpu(endpoint_attr->endpoint->wMaxPacketSize) & 0x07ff);
- }
- static ssize_t show_ep_type(struct device *dev, struct device_attribute *attr, char *buf)
- {
- struct endpoint_attribute *endpoint_attr = to_endpoint_attr(attr);
- char *type = "unknown";
- switch (endpoint_attr->endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
- case USB_ENDPOINT_XFER_CONTROL:
- type = "Control";
- break;
- case USB_ENDPOINT_XFER_ISOC:
- type = "Isoc";
- break;
- case USB_ENDPOINT_XFER_BULK:
- type = "Bulk";
- break;
- case USB_ENDPOINT_XFER_INT:
- type = "Interrupt";
- break;
- }
- return sprintf(buf, "%s\n", type);
- }
- static ssize_t show_ep_interval(struct device *dev, struct device_attribute *attr, char *buf)
- {
- struct endpoint_attribute *endpoint_attr = to_endpoint_attr(attr);
- struct usb_device *udev = endpoint_attr->udev;
- struct usb_endpoint_descriptor *endpoint = endpoint_attr->endpoint;
- char unit;
- unsigned interval = 0;
- unsigned in;
- in = (endpoint->bEndpointAddress & USB_DIR_IN);
- switch (endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
- case USB_ENDPOINT_XFER_CONTROL:
- if (udev->speed == USB_SPEED_HIGH) /* uframes per NAK */
- interval = endpoint->bInterval;
- break;
- case USB_ENDPOINT_XFER_ISOC:
- interval = 1 << (endpoint->bInterval - 1);
- break;
- case USB_ENDPOINT_XFER_BULK:
- if (udev->speed == USB_SPEED_HIGH && !in) /* uframes per NAK */
- interval = endpoint->bInterval;
- break;
- case USB_ENDPOINT_XFER_INT:
- if (udev->speed == USB_SPEED_HIGH) {
- interval = 1 << (endpoint->bInterval - 1);
- } else
- interval = endpoint->bInterval;
- break;
- }
- interval *= (udev->speed == USB_SPEED_HIGH) ? 125 : 1000;
- if (interval % 1000)
- unit = 'u';
- else {
- unit = 'm';
- interval /= 1000;
- }
- return sprintf(buf, "%d%cs\n", interval, unit);
- }
- static ssize_t show_ep_direction(struct device *dev, struct device_attribute *attr, char *buf)
- {
- struct endpoint_attribute *endpoint_attr = to_endpoint_attr(attr);
- char *direction;
- if ((endpoint_attr->endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
- USB_ENDPOINT_XFER_CONTROL)
- direction = "both";
- else if (endpoint_attr->endpoint->bEndpointAddress & USB_DIR_IN)
- direction = "in";
- else
- direction = "out";
- return sprintf(buf, "%s\n", direction);
- }
- static struct endpoint_attribute *create_ep_attr(struct usb_endpoint_descriptor *endpoint,
- struct usb_device *udev, char *name,
- ssize_t (*show)(struct device *dev, struct device_attribute *attr, char *buf))
- {
- struct endpoint_attribute *ep_attr;
- ep_attr = kzalloc(sizeof(*ep_attr), GFP_KERNEL);
- if (ep_attr) {
- ep_attr->endpoint = endpoint;
- ep_attr->udev = udev;
- ep_attr->dev_attr.attr.name = name;
- ep_attr->dev_attr.attr.mode = 0444;
- ep_attr->dev_attr.attr.owner = THIS_MODULE;
- ep_attr->dev_attr.show = show;
- }
- return ep_attr;
- }
- static void usb_create_ep_files(struct kobject *kobj, struct usb_host_endpoint *endpoint, struct usb_device *udev)
- {
- struct usb_endpoint_descriptor *ep;
- ep = &endpoint->desc;
- endpoint->attrs = kzalloc(sizeof(struct attribute *) * 10, GFP_KERNEL);
- endpoint->attrs[0] = &(create_ep_attr(ep, udev, "direction", show_ep_direction)->dev_attr.attr);
- endpoint->attrs[1] = &(create_ep_attr(ep, udev, "type", show_ep_type)->dev_attr.attr);
- endpoint->attrs[2] = &(create_ep_attr(ep, udev, "bLength", show_ep_bLength)->dev_attr.attr);
- endpoint->attrs[3] = &(create_ep_attr(ep, udev, "bDescriptorType", show_ep_bDescriptorType)->dev_attr.attr);
- endpoint->attrs[4] = &(create_ep_attr(ep, udev, "bEndpointAddress", show_ep_bEndpointAddress)->dev_attr.attr);
- endpoint->attrs[5] = &(create_ep_attr(ep, udev, "bmAttributes", show_ep_bmAttributes)->dev_attr.attr);
- endpoint->attrs[6] = &(create_ep_attr(ep, udev, "wMaxPacketSize", show_ep_wMaxPacketSize)->dev_attr.attr);
- endpoint->attrs[7] = &(create_ep_attr(ep, udev, "bInterval", show_ep_bInterval)->dev_attr.attr);
- endpoint->attrs[8] = &(create_ep_attr(ep, udev, "interval", show_ep_interval)->dev_attr.attr);
- endpoint->attrs[9] = NULL;
- endpoint->num_attrs = 9;
- endpoint->attr_group = kzalloc(sizeof(*endpoint->attr_group), GFP_KERNEL);
- endpoint->attr_name = kzalloc(10, GFP_KERNEL);
- sprintf(endpoint->attr_name, "ep_%02x", endpoint->desc.bEndpointAddress);
- endpoint->attr_group->attrs = endpoint->attrs;
- endpoint->attr_group->name = endpoint->attr_name;
- sysfs_create_group(kobj, endpoint->attr_group);
- }
- static void usb_remove_ep_files(struct kobject *kobj, struct usb_host_endpoint *endpoint)
- {
- int i;
- sysfs_remove_group(kobj, endpoint->attr_group);
- kfree(endpoint->attr_group);
- kfree(endpoint->attr_name);
- for (i = 0; i < endpoint->num_attrs; ++i)
- kfree(endpoint->attrs[i]);
- kfree(endpoint->attrs);
- }
- /* Active configuration fields */
- #define usb_actconfig_show(field, multiplier, format_string) \
- static ssize_t show_##field (struct device *dev, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, struct device_attribute *attr, 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")
- usb_descriptor_attr (bMaxPacketSize0, "%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_bMaxPacketSize0.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);
- usb_create_ep_files(&dev->kobj, &udev->ep0, udev);
- }
- void usb_remove_sysfs_dev_files (struct usb_device *udev)
- {
- struct device *dev = &udev->dev;
- usb_remove_ep_files(&dev->kobj, &udev->ep0);
- 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, 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;
- 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 ssize_t show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
- {
- struct usb_interface *intf;
- struct usb_device *udev;
- int len;
- intf = to_usb_interface(dev);
- udev = interface_to_usbdev(intf);
- len = sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02Xic",
- 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);
- buf += len;
- if (udev->descriptor.bDeviceClass == 0) {
- struct usb_host_interface *alt = intf->cur_altsetting;
- return len + sprintf(buf, "%02Xisc%02Xip%02X\n",
- alt->desc.bInterfaceClass,
- alt->desc.bInterfaceSubClass,
- alt->desc.bInterfaceProtocol);
- } else {
- return len + sprintf(buf, "*isc*ip*\n");
- }
- }
- static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, 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,
- NULL,
- };
- static struct attribute_group intf_attr_grp = {
- .attrs = intf_attrs,
- };
- static void usb_create_intf_ep_files(struct usb_interface *intf)
- {
- struct usb_host_interface *iface_desc;
- int i;
- iface_desc = intf->cur_altsetting;
- for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i)
- usb_create_ep_files(&intf->dev.kobj, &iface_desc->endpoint[i],
- interface_to_usbdev(intf));
- }
- static void usb_remove_intf_ep_files(struct usb_interface *intf)
- {
- struct usb_host_interface *iface_desc;
- int i;
- iface_desc = intf->cur_altsetting;
- for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i)
- usb_remove_ep_files(&intf->dev.kobj, &iface_desc->endpoint[i]);
- }
- 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);
- usb_create_intf_ep_files(intf);
- }
- void usb_remove_sysfs_intf_files (struct usb_interface *intf)
- {
- usb_remove_intf_ep_files(intf);
- sysfs_remove_group(&intf->dev.kobj, &intf_attr_grp);
- if (intf->cur_altsetting->string)
- device_remove_file(&intf->dev, &dev_attr_interface);
- }
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