094f164957
This patch adds endpoint information for both devices and interfaces to sysfs. Previously it was only possible to get the endpoint information from usbfs, and never possible to get any information on endpoint 0. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> drivers/usb/core/sysfs.c | 195 ++++++++++++++++++++++++++++++++++++++++++++++- include/linux/usb.h | 4 2 files changed, 197 insertions(+), 2 deletions(-)
543 lines
16 KiB
C
543 lines
16 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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/* endpoint stuff */
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struct endpoint_attribute {
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struct device_attribute dev_attr;
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struct usb_endpoint_descriptor *endpoint;
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struct usb_device *udev;
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};
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#define to_endpoint_attr(_dev_attr) \
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container_of(_dev_attr, struct endpoint_attribute, dev_attr)
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#define usb_ep_attr(field, format_string) \
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static ssize_t show_ep_##field(struct device *dev, struct device_attribute *attr, \
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char *buf) \
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{ \
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struct endpoint_attribute *endpoint_attr = to_endpoint_attr(attr); \
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\
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return sprintf(buf, format_string, endpoint_attr->endpoint->field); \
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}
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usb_ep_attr(bLength, "%02x\n")
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usb_ep_attr(bDescriptorType, "%02x\n")
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usb_ep_attr(bEndpointAddress, "%02x\n")
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usb_ep_attr(bmAttributes, "%02x\n")
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usb_ep_attr(bInterval, "%02x\n")
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static ssize_t show_ep_wMaxPacketSize(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct endpoint_attribute *endpoint_attr = to_endpoint_attr(attr);
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return sprintf(buf, "%04x\n",
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le16_to_cpu(endpoint_attr->endpoint->wMaxPacketSize) & 0x07ff);
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}
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static ssize_t show_ep_type(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct endpoint_attribute *endpoint_attr = to_endpoint_attr(attr);
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char *type = "unknown";
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switch (endpoint_attr->endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
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case USB_ENDPOINT_XFER_CONTROL:
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type = "Control";
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break;
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case USB_ENDPOINT_XFER_ISOC:
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type = "Isoc";
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break;
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case USB_ENDPOINT_XFER_BULK:
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type = "Bulk";
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break;
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case USB_ENDPOINT_XFER_INT:
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type = "Interrupt";
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break;
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}
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return sprintf(buf, "%s\n", type);
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}
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static ssize_t show_ep_interval(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct endpoint_attribute *endpoint_attr = to_endpoint_attr(attr);
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struct usb_device *udev = endpoint_attr->udev;
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struct usb_endpoint_descriptor *endpoint = endpoint_attr->endpoint;
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char unit;
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unsigned interval = 0;
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unsigned in;
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in = (endpoint->bEndpointAddress & USB_DIR_IN);
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switch (endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
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case USB_ENDPOINT_XFER_CONTROL:
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if (udev->speed == USB_SPEED_HIGH) /* uframes per NAK */
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interval = endpoint->bInterval;
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break;
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case USB_ENDPOINT_XFER_ISOC:
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interval = 1 << (endpoint->bInterval - 1);
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break;
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case USB_ENDPOINT_XFER_BULK:
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if (udev->speed == USB_SPEED_HIGH && !in) /* uframes per NAK */
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interval = endpoint->bInterval;
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break;
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case USB_ENDPOINT_XFER_INT:
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if (udev->speed == USB_SPEED_HIGH) {
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interval = 1 << (endpoint->bInterval - 1);
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} else
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interval = endpoint->bInterval;
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break;
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}
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interval *= (udev->speed == USB_SPEED_HIGH) ? 125 : 1000;
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if (interval % 1000)
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unit = 'u';
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else {
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unit = 'm';
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interval /= 1000;
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}
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return sprintf(buf, "%d%cs\n", interval, unit);
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}
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static ssize_t show_ep_direction(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct endpoint_attribute *endpoint_attr = to_endpoint_attr(attr);
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char *direction;
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if ((endpoint_attr->endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
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USB_ENDPOINT_XFER_CONTROL)
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direction = "both";
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else if (endpoint_attr->endpoint->bEndpointAddress & USB_DIR_IN)
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direction = "in";
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else
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direction = "out";
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return sprintf(buf, "%s\n", direction);
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}
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static struct endpoint_attribute *create_ep_attr(struct usb_endpoint_descriptor *endpoint,
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struct usb_device *udev, char *name,
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ssize_t (*show)(struct device *dev, struct device_attribute *attr, char *buf))
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{
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struct endpoint_attribute *ep_attr;
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ep_attr = kzalloc(sizeof(*ep_attr), GFP_KERNEL);
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if (ep_attr) {
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ep_attr->endpoint = endpoint;
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ep_attr->udev = udev;
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ep_attr->dev_attr.attr.name = name;
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ep_attr->dev_attr.attr.mode = 0444;
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ep_attr->dev_attr.attr.owner = THIS_MODULE;
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ep_attr->dev_attr.show = show;
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}
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return ep_attr;
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}
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static void usb_create_ep_files(struct kobject *kobj, struct usb_host_endpoint *endpoint, struct usb_device *udev)
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{
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struct usb_endpoint_descriptor *ep;
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ep = &endpoint->desc;
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endpoint->attrs = kzalloc(sizeof(struct attribute *) * 10, GFP_KERNEL);
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endpoint->attrs[0] = &(create_ep_attr(ep, udev, "direction", show_ep_direction)->dev_attr.attr);
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endpoint->attrs[1] = &(create_ep_attr(ep, udev, "type", show_ep_type)->dev_attr.attr);
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endpoint->attrs[2] = &(create_ep_attr(ep, udev, "bLength", show_ep_bLength)->dev_attr.attr);
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endpoint->attrs[3] = &(create_ep_attr(ep, udev, "bDescriptorType", show_ep_bDescriptorType)->dev_attr.attr);
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endpoint->attrs[4] = &(create_ep_attr(ep, udev, "bEndpointAddress", show_ep_bEndpointAddress)->dev_attr.attr);
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endpoint->attrs[5] = &(create_ep_attr(ep, udev, "bmAttributes", show_ep_bmAttributes)->dev_attr.attr);
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endpoint->attrs[6] = &(create_ep_attr(ep, udev, "wMaxPacketSize", show_ep_wMaxPacketSize)->dev_attr.attr);
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endpoint->attrs[7] = &(create_ep_attr(ep, udev, "bInterval", show_ep_bInterval)->dev_attr.attr);
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endpoint->attrs[8] = &(create_ep_attr(ep, udev, "interval", show_ep_interval)->dev_attr.attr);
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endpoint->attrs[9] = NULL;
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endpoint->num_attrs = 9;
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endpoint->attr_group = kzalloc(sizeof(*endpoint->attr_group), GFP_KERNEL);
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endpoint->attr_name = kzalloc(10, GFP_KERNEL);
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sprintf(endpoint->attr_name, "ep_%02x", endpoint->desc.bEndpointAddress);
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endpoint->attr_group->attrs = endpoint->attrs;
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endpoint->attr_group->name = endpoint->attr_name;
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sysfs_create_group(kobj, endpoint->attr_group);
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}
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static void usb_remove_ep_files(struct kobject *kobj, struct usb_host_endpoint *endpoint)
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{
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int i;
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sysfs_remove_group(kobj, endpoint->attr_group);
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kfree(endpoint->attr_group);
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kfree(endpoint->attr_name);
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for (i = 0; i < endpoint->num_attrs; ++i)
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kfree(endpoint->attrs[i]);
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kfree(endpoint->attrs);
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}
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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, 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, 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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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, struct device_attribute *attr, 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, struct device_attribute *attr, 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, 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_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_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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/* 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, 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, 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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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_bMaxPacketSize0.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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usb_create_ep_files(&dev->kobj, &udev->ep0, udev);
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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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usb_remove_ep_files(&dev->kobj, &udev->ep0);
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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, struct device_attribute *attr, 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, struct device_attribute *attr, 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 ssize_t show_modalias(struct device *dev, struct device_attribute *attr, 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 = 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);
|
|
}
|