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562 lines
15 KiB
562 lines
15 KiB
/*
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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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#include <linux/usb.h>
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#include "usb.h"
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/* endpoint stuff */
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struct ep_object {
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struct usb_endpoint_descriptor *desc;
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struct usb_device *udev;
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struct kobject kobj;
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};
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#define to_ep_object(_kobj) \
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container_of(_kobj, struct ep_object, kobj)
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struct ep_attribute {
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struct attribute attr;
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ssize_t (*show)(struct usb_device *,
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struct usb_endpoint_descriptor *, char *);
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};
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#define to_ep_attribute(_attr) \
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container_of(_attr, struct ep_attribute, attr)
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#define EP_ATTR(_name) \
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struct ep_attribute ep_##_name = { \
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.attr = {.name = #_name, .owner = THIS_MODULE, \
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.mode = S_IRUGO}, \
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.show = show_ep_##_name}
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#define usb_ep_attr(field, format_string) \
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static ssize_t show_ep_##field(struct usb_device *udev, \
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struct usb_endpoint_descriptor *desc, \
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char *buf) \
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{ \
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return sprintf(buf, format_string, desc->field); \
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} \
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static EP_ATTR(field);
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usb_ep_attr(bLength, "%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 usb_device *udev,
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struct usb_endpoint_descriptor *desc, char *buf)
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{
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return sprintf(buf, "%04x\n",
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le16_to_cpu(desc->wMaxPacketSize) & 0x07ff);
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}
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static EP_ATTR(wMaxPacketSize);
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static ssize_t show_ep_type(struct usb_device *udev,
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struct usb_endpoint_descriptor *desc, char *buf)
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{
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char *type = "unknown";
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switch (desc->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 EP_ATTR(type);
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static ssize_t show_ep_interval(struct usb_device *udev,
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struct usb_endpoint_descriptor *desc, char *buf)
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{
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char unit;
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unsigned interval = 0;
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unsigned in;
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in = (desc->bEndpointAddress & USB_DIR_IN);
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switch (desc->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 = desc->bInterval;
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break;
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case USB_ENDPOINT_XFER_ISOC:
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interval = 1 << (desc->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 = desc->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 << (desc->bInterval - 1);
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else
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interval = desc->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 EP_ATTR(interval);
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static ssize_t show_ep_direction(struct usb_device *udev,
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struct usb_endpoint_descriptor *desc, char *buf)
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{
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char *direction;
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if ((desc->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 (desc->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 EP_ATTR(direction);
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static struct attribute *ep_attrs[] = {
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&ep_bLength.attr,
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&ep_bEndpointAddress.attr,
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&ep_bmAttributes.attr,
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&ep_bInterval.attr,
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&ep_wMaxPacketSize.attr,
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&ep_type.attr,
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&ep_interval.attr,
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&ep_direction.attr,
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NULL,
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};
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static void ep_object_release(struct kobject *kobj)
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{
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kfree(to_ep_object(kobj));
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}
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static ssize_t ep_object_show(struct kobject *kobj, struct attribute *attr,
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char *buf)
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{
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struct ep_object *ep_obj = to_ep_object(kobj);
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struct ep_attribute *ep_attr = to_ep_attribute(attr);
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return (ep_attr->show)(ep_obj->udev, ep_obj->desc, buf);
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}
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static struct sysfs_ops ep_object_sysfs_ops = {
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.show = ep_object_show,
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};
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static struct kobj_type ep_object_ktype = {
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.release = ep_object_release,
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.sysfs_ops = &ep_object_sysfs_ops,
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.default_attrs = ep_attrs,
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};
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static void usb_create_ep_files(struct kobject *parent,
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struct usb_host_endpoint *endpoint,
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struct usb_device *udev)
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{
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struct ep_object *ep_obj;
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struct kobject *kobj;
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ep_obj = kzalloc(sizeof(struct ep_object), GFP_KERNEL);
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if (!ep_obj)
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return;
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ep_obj->desc = &endpoint->desc;
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ep_obj->udev = udev;
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kobj = &ep_obj->kobj;
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kobject_set_name(kobj, "ep_%02x", endpoint->desc.bEndpointAddress);
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kobj->parent = parent;
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kobj->ktype = &ep_object_ktype;
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/* Don't use kobject_register, because it generates a hotplug event */
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kobject_init(kobj);
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if (kobject_add(kobj) == 0)
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endpoint->kobj = kobj;
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else
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kobject_put(kobj);
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}
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static void usb_remove_ep_files(struct usb_host_endpoint *endpoint)
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{
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if (endpoint->kobj) {
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kobject_del(endpoint->kobj);
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kobject_put(endpoint->kobj);
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endpoint->kobj = NULL;
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}
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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, \
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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,
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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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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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return sprintf(buf, "%s\n", actconfig->string);
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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,
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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, \
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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, "%s\n", udev->name); \
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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, \
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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, \
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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(&udev->ep0);
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sysfs_remove_group(&dev->kobj, &dev_attr_grp);
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if (udev->manufacturer)
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device_remove_file(dev, &dev_attr_manufacturer);
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if (udev->product)
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device_remove_file(dev, &dev_attr_product);
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if (udev->serial)
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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, \
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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, \
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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,
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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,
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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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struct usb_host_interface *alt;
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intf = to_usb_interface(dev);
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udev = interface_to_usbdev(intf);
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alt = intf->cur_altsetting;
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return sprintf(buf, "usb:v%04Xp%04Xd%04Xdc%02Xdsc%02Xdp%02X"
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"ic%02Xisc%02Xip%02X\n",
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le16_to_cpu(udev->descriptor.idVendor),
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le16_to_cpu(udev->descriptor.idProduct),
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le16_to_cpu(udev->descriptor.bcdDevice),
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udev->descriptor.bDeviceClass,
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udev->descriptor.bDeviceSubClass,
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udev->descriptor.bDeviceProtocol,
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alt->desc.bInterfaceClass,
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alt->desc.bInterfaceSubClass,
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alt->desc.bInterfaceProtocol);
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}
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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 inline void usb_create_intf_ep_files(struct usb_interface *intf,
|
|
struct usb_device *udev)
|
|
{
|
|
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],
|
|
udev);
|
|
}
|
|
|
|
static inline 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(&iface_desc->endpoint[i]);
|
|
}
|
|
|
|
void usb_create_sysfs_intf_files (struct usb_interface *intf)
|
|
{
|
|
struct usb_device *udev = interface_to_usbdev(intf);
|
|
struct usb_host_interface *alt = intf->cur_altsetting;
|
|
|
|
sysfs_create_group(&intf->dev.kobj, &intf_attr_grp);
|
|
|
|
if (alt->string == NULL)
|
|
alt->string = usb_cache_string(udev, alt->desc.iInterface);
|
|
if (alt->string)
|
|
device_create_file(&intf->dev, &dev_attr_interface);
|
|
usb_create_intf_ep_files(intf, udev);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|