diff options
| -rw-r--r-- | drivers/usb/core/sysfs.c | 195 | ||||
| -rw-r--r-- | include/linux/usb.h | 4 |
2 files changed, 197 insertions, 2 deletions
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c index 00297f113849..eae413bf8c2a 100644 --- a/drivers/usb/core/sysfs.c +++ b/drivers/usb/core/sysfs.c @@ -22,6 +22,174 @@ #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) \ @@ -236,12 +404,14 @@ void usb_create_sysfs_dev_files (struct usb_device *udev) 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) @@ -333,20 +503,41 @@ 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); - } diff --git a/include/linux/usb.h b/include/linux/usb.h index 8f731e8f2821..4512210e97e7 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -57,6 +57,10 @@ struct usb_host_endpoint { struct usb_endpoint_descriptor desc; struct list_head urb_list; void *hcpriv; + char *attr_name; + struct attribute_group *attr_group; + struct attribute **attrs; + int num_attrs; unsigned char *extra; /* Extra descriptors */ int extralen; |