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-rw-r--r--drivers/usb/core/Kconfig16
-rw-r--r--drivers/usb/core/Makefile4
-rw-r--r--drivers/usb/core/config.c192
-rw-r--r--drivers/usb/core/driver.c56
-rw-r--r--drivers/usb/core/endpoint.c160
-rw-r--r--drivers/usb/core/hcd-pci.c244
-rw-r--r--drivers/usb/core/hcd.c220
-rw-r--r--drivers/usb/core/hcd.h55
-rw-r--r--drivers/usb/core/hub.c134
-rw-r--r--drivers/usb/core/hub.h3
-rw-r--r--drivers/usb/core/message.c194
-rw-r--r--drivers/usb/core/sysfs.c12
-rw-r--r--drivers/usb/core/urb.c12
-rw-r--r--drivers/usb/core/usb.c76
-rw-r--r--drivers/usb/core/usb.h13
15 files changed, 907 insertions, 484 deletions
diff --git a/drivers/usb/core/Kconfig b/drivers/usb/core/Kconfig
index e1759d17ac5d..69280c35b5cb 100644
--- a/drivers/usb/core/Kconfig
+++ b/drivers/usb/core/Kconfig
@@ -28,7 +28,7 @@ comment "Miscellaneous USB options"
depends on USB
config USB_DEVICEFS
- bool "USB device filesystem"
+ bool "USB device filesystem (DEPRECATED)" if EMBEDDED
depends on USB
---help---
If you say Y here (and to "/proc file system support" in the "File
@@ -46,11 +46,15 @@ config USB_DEVICEFS
For the format of the various /proc/bus/usb/ files, please read
<file:Documentation/usb/proc_usb_info.txt>.
- Usbfs files can't handle Access Control Lists (ACL), which are the
- default way to grant access to USB devices for untrusted users of a
- desktop system. The usbfs functionality is replaced by real
- device-nodes managed by udev. These nodes live in /dev/bus/usb and
- are used by libusb.
+ Modern Linux systems do not use this.
+
+ Usbfs entries are files and not character devices; usbfs can't
+ handle Access Control Lists (ACL) which are the default way to
+ grant access to USB devices for untrusted users of a desktop
+ system.
+
+ The usbfs functionality is replaced by real device-nodes managed by
+ udev. These nodes lived in /dev/bus/usb and are used by libusb.
config USB_DEVICE_CLASS
bool "USB device class-devices (DEPRECATED)"
diff --git a/drivers/usb/core/Makefile b/drivers/usb/core/Makefile
index b6078706fb93..ec16e6029905 100644
--- a/drivers/usb/core/Makefile
+++ b/drivers/usb/core/Makefile
@@ -4,14 +4,14 @@
usbcore-objs := usb.o hub.o hcd.o urb.o message.o driver.o \
config.o file.o buffer.o sysfs.o endpoint.o \
- devio.o notify.o generic.o quirks.o
+ devio.o notify.o generic.o quirks.o devices.o
ifeq ($(CONFIG_PCI),y)
usbcore-objs += hcd-pci.o
endif
ifeq ($(CONFIG_USB_DEVICEFS),y)
- usbcore-objs += inode.o devices.o
+ usbcore-objs += inode.o
endif
obj-$(CONFIG_USB) += usbcore.o
diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c
index 568244c99bdc..24dfb33f90cb 100644
--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -19,6 +19,32 @@ static inline const char *plural(int n)
return (n == 1 ? "" : "s");
}
+/* FIXME: this is a kludge */
+static int find_next_descriptor_more(unsigned char *buffer, int size,
+ int dt1, int dt2, int dt3, int *num_skipped)
+{
+ struct usb_descriptor_header *h;
+ int n = 0;
+ unsigned char *buffer0 = buffer;
+
+ /* Find the next descriptor of type dt1 or dt2 or dt3 */
+ while (size > 0) {
+ h = (struct usb_descriptor_header *) buffer;
+ if (h->bDescriptorType == dt1 || h->bDescriptorType == dt2 ||
+ h->bDescriptorType == dt3)
+ break;
+ buffer += h->bLength;
+ size -= h->bLength;
+ ++n;
+ }
+
+ /* Store the number of descriptors skipped and return the
+ * number of bytes skipped */
+ if (num_skipped)
+ *num_skipped = n;
+ return buffer - buffer0;
+}
+
static int find_next_descriptor(unsigned char *buffer, int size,
int dt1, int dt2, int *num_skipped)
{
@@ -43,6 +69,129 @@ static int find_next_descriptor(unsigned char *buffer, int size,
return buffer - buffer0;
}
+static int usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno,
+ int inum, int asnum, struct usb_host_endpoint *ep,
+ int num_ep, unsigned char *buffer, int size)
+{
+ unsigned char *buffer_start = buffer;
+ struct usb_ss_ep_comp_descriptor *desc;
+ int retval;
+ int num_skipped;
+ int max_tx;
+ int i;
+
+ /* Allocate space for the SS endpoint companion descriptor */
+ ep->ss_ep_comp = kzalloc(sizeof(struct usb_host_ss_ep_comp),
+ GFP_KERNEL);
+ if (!ep->ss_ep_comp)
+ return -ENOMEM;
+ desc = (struct usb_ss_ep_comp_descriptor *) buffer;
+ if (desc->bDescriptorType != USB_DT_SS_ENDPOINT_COMP) {
+ dev_warn(ddev, "No SuperSpeed endpoint companion for config %d "
+ " interface %d altsetting %d ep %d: "
+ "using minimum values\n",
+ cfgno, inum, asnum, ep->desc.bEndpointAddress);
+ ep->ss_ep_comp->desc.bLength = USB_DT_SS_EP_COMP_SIZE;
+ ep->ss_ep_comp->desc.bDescriptorType = USB_DT_SS_ENDPOINT_COMP;
+ ep->ss_ep_comp->desc.bMaxBurst = 0;
+ /*
+ * Leave bmAttributes as zero, which will mean no streams for
+ * bulk, and isoc won't support multiple bursts of packets.
+ * With bursts of only one packet, and a Mult of 1, the max
+ * amount of data moved per endpoint service interval is one
+ * packet.
+ */
+ if (usb_endpoint_xfer_isoc(&ep->desc) ||
+ usb_endpoint_xfer_int(&ep->desc))
+ ep->ss_ep_comp->desc.wBytesPerInterval =
+ ep->desc.wMaxPacketSize;
+ /*
+ * The next descriptor is for an Endpoint or Interface,
+ * no extra descriptors to copy into the companion structure,
+ * and we didn't eat up any of the buffer.
+ */
+ retval = 0;
+ goto valid;
+ }
+ memcpy(&ep->ss_ep_comp->desc, desc, USB_DT_SS_EP_COMP_SIZE);
+ desc = &ep->ss_ep_comp->desc;
+ buffer += desc->bLength;
+ size -= desc->bLength;
+
+ /* Eat up the other descriptors we don't care about */
+ ep->ss_ep_comp->extra = buffer;
+ i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
+ USB_DT_INTERFACE, &num_skipped);
+ ep->ss_ep_comp->extralen = i;
+ buffer += i;
+ size -= i;
+ retval = buffer - buffer_start + i;
+ if (num_skipped > 0)
+ dev_dbg(ddev, "skipped %d descriptor%s after %s\n",
+ num_skipped, plural(num_skipped),
+ "SuperSpeed endpoint companion");
+
+ /* Check the various values */
+ if (usb_endpoint_xfer_control(&ep->desc) && desc->bMaxBurst != 0) {
+ dev_warn(ddev, "Control endpoint with bMaxBurst = %d in "
+ "config %d interface %d altsetting %d ep %d: "
+ "setting to zero\n", desc->bMaxBurst,
+ cfgno, inum, asnum, ep->desc.bEndpointAddress);
+ desc->bMaxBurst = 0;
+ }
+ if (desc->bMaxBurst > 15) {
+ dev_warn(ddev, "Endpoint with bMaxBurst = %d in "
+ "config %d interface %d altsetting %d ep %d: "
+ "setting to 15\n", desc->bMaxBurst,
+ cfgno, inum, asnum, ep->desc.bEndpointAddress);
+ desc->bMaxBurst = 15;
+ }
+ if ((usb_endpoint_xfer_control(&ep->desc) || usb_endpoint_xfer_int(&ep->desc))
+ && desc->bmAttributes != 0) {
+ dev_warn(ddev, "%s endpoint with bmAttributes = %d in "
+ "config %d interface %d altsetting %d ep %d: "
+ "setting to zero\n",
+ usb_endpoint_xfer_control(&ep->desc) ? "Control" : "Bulk",
+ desc->bmAttributes,
+ cfgno, inum, asnum, ep->desc.bEndpointAddress);
+ desc->bmAttributes = 0;
+ }
+ if (usb_endpoint_xfer_bulk(&ep->desc) && desc->bmAttributes > 16) {
+ dev_warn(ddev, "Bulk endpoint with more than 65536 streams in "
+ "config %d interface %d altsetting %d ep %d: "
+ "setting to max\n",
+ cfgno, inum, asnum, ep->desc.bEndpointAddress);
+ desc->bmAttributes = 16;
+ }
+ if (usb_endpoint_xfer_isoc(&ep->desc) && desc->bmAttributes > 2) {
+ dev_warn(ddev, "Isoc endpoint has Mult of %d in "
+ "config %d interface %d altsetting %d ep %d: "
+ "setting to 3\n", desc->bmAttributes + 1,
+ cfgno, inum, asnum, ep->desc.bEndpointAddress);
+ desc->bmAttributes = 2;
+ }
+ if (usb_endpoint_xfer_isoc(&ep->desc)) {
+ max_tx = ep->desc.wMaxPacketSize * (desc->bMaxBurst + 1) *
+ (desc->bmAttributes + 1);
+ } else if (usb_endpoint_xfer_int(&ep->desc)) {
+ max_tx = ep->desc.wMaxPacketSize * (desc->bMaxBurst + 1);
+ } else {
+ goto valid;
+ }
+ if (desc->wBytesPerInterval > max_tx) {
+ dev_warn(ddev, "%s endpoint with wBytesPerInterval of %d in "
+ "config %d interface %d altsetting %d ep %d: "
+ "setting to %d\n",
+ usb_endpoint_xfer_isoc(&ep->desc) ? "Isoc" : "Int",
+ desc->wBytesPerInterval,
+ cfgno, inum, asnum, ep->desc.bEndpointAddress,
+ max_tx);
+ desc->wBytesPerInterval = max_tx;
+ }
+valid:
+ return retval;
+}
+
static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
int asnum, struct usb_host_interface *ifp, int num_ep,
unsigned char *buffer, int size)
@@ -50,7 +199,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
unsigned char *buffer0 = buffer;
struct usb_endpoint_descriptor *d;
struct usb_host_endpoint *endpoint;
- int n, i, j;
+ int n, i, j, retval;
d = (struct usb_endpoint_descriptor *) buffer;
buffer += d->bLength;
@@ -92,6 +241,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
if (usb_endpoint_xfer_int(d)) {
i = 1;
switch (to_usb_device(ddev)->speed) {
+ case USB_SPEED_SUPER:
case USB_SPEED_HIGH:
/* Many device manufacturers are using full-speed
* bInterval values in high-speed interrupt endpoint
@@ -161,17 +311,39 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
cfgno, inum, asnum, d->bEndpointAddress,
maxp);
}
-
- /* Skip over any Class Specific or Vendor Specific descriptors;
- * find the next endpoint or interface descriptor */
- endpoint->extra = buffer;
- i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
- USB_DT_INTERFACE, &n);
- endpoint->extralen = i;
+ /* Allocate room for and parse any SS endpoint companion descriptors */
+ if (to_usb_device(ddev)->speed == USB_SPEED_SUPER) {
+ endpoint->extra = buffer;
+ i = find_next_descriptor_more(buffer, size, USB_DT_SS_ENDPOINT_COMP,
+ USB_DT_ENDPOINT, USB_DT_INTERFACE, &n);
+ endpoint->extralen = i;
+ buffer += i;
+ size -= i;
+
+ if (size > 0) {
+ retval = usb_parse_ss_endpoint_companion(ddev, cfgno,
+ inum, asnum, endpoint, num_ep, buffer,
+ size);
+ if (retval >= 0) {
+ buffer += retval;
+ retval = buffer - buffer0;
+ }
+ } else {
+ retval = buffer - buffer0;
+ }
+ } else {
+ /* Skip over any Class Specific or Vendor Specific descriptors;
+ * find the next endpoint or interface descriptor */
+ endpoint->extra = buffer;
+ i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
+ USB_DT_INTERFACE, &n);
+ endpoint->extralen = i;
+ retval = buffer - buffer0 + i;
+ }
if (n > 0)
dev_dbg(ddev, "skipped %d descriptor%s after %s\n",
n, plural(n), "endpoint");
- return buffer - buffer0 + i;
+ return retval;
skip_to_next_endpoint_or_interface_descriptor:
i = find_next_descriptor(buffer, size, USB_DT_ENDPOINT,
@@ -452,6 +624,8 @@ static int usb_parse_configuration(struct device *ddev, int cfgidx,
kref_init(&intfc->ref);
}
+ /* FIXME: parse the BOS descriptor */
+
/* Skip over any Class Specific or Vendor Specific descriptors;
* find the first interface descriptor */
config->extra = buffer;
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index d0a21a5f8201..69e5773abfce 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -154,16 +154,11 @@ static const struct usb_device_id *usb_match_dynamic_id(struct usb_interface *in
static int usb_probe_device(struct device *dev)
{
struct usb_device_driver *udriver = to_usb_device_driver(dev->driver);
- struct usb_device *udev;
+ struct usb_device *udev = to_usb_device(dev);
int error = -ENODEV;
dev_dbg(dev, "%s\n", __func__);
- if (!is_usb_device(dev)) /* Sanity check */
- return error;
-
- udev = to_usb_device(dev);
-
/* TODO: Add real matching code */
/* The device should always appear to be in use
@@ -203,18 +198,13 @@ static void usb_cancel_queued_reset(struct usb_interface *iface)
static int usb_probe_interface(struct device *dev)
{
struct usb_driver *driver = to_usb_driver(dev->driver);
- struct usb_interface *intf;
- struct usb_device *udev;
+ struct usb_interface *intf = to_usb_interface(dev);
+ struct usb_device *udev = interface_to_usbdev(intf);
const struct usb_device_id *id;
int error = -ENODEV;
dev_dbg(dev, "%s\n", __func__);
- if (is_usb_device(dev)) /* Sanity check */
- return error;
-
- intf = to_usb_interface(dev);
- udev = interface_to_usbdev(intf);
intf->needs_binding = 0;
if (udev->authorized == 0) {
@@ -385,7 +375,6 @@ void usb_driver_release_interface(struct usb_driver *driver,
struct usb_interface *iface)
{
struct device *dev = &iface->dev;
- struct usb_device *udev = interface_to_usbdev(iface);
/* this should never happen, don't release something that's not ours */
if (!dev->driver || dev->driver != &driver->drvwrap.driver)
@@ -394,23 +383,19 @@ void usb_driver_release_interface(struct usb_driver *driver,
/* don't release from within disconnect() */
if (iface->condition != USB_INTERFACE_BOUND)
return;
+ iface->condition = USB_INTERFACE_UNBINDING;
- /* don't release if the interface hasn't been added yet */
+ /* Release via the driver core only if the interface
+ * has already been registered
+ */
if (device_is_registered(dev)) {
- iface->condition = USB_INTERFACE_UNBINDING;
device_release_driver(dev);
} else {
- iface->condition = USB_INTERFACE_UNBOUND;
- usb_cancel_queued_reset(iface);
+ down(&dev->sem);
+ usb_unbind_interface(dev);
+ dev->driver = NULL;
+ up(&dev->sem);
}
- dev->driver = NULL;
- usb_set_intfdata(iface, NULL);
-
- usb_pm_lock(udev);
- iface->condition = USB_INTERFACE_UNBOUND;
- mark_quiesced(iface);
- iface->needs_remote_wakeup = 0;
- usb_pm_unlock(udev);
}
EXPORT_SYMBOL_GPL(usb_driver_release_interface);
@@ -598,7 +583,7 @@ static int usb_device_match(struct device *dev, struct device_driver *drv)
/* TODO: Add real matching code */
return 1;
- } else {
+ } else if (is_usb_interface(dev)) {
struct usb_interface *intf;
struct usb_driver *usb_drv;
const struct usb_device_id *id;
@@ -630,11 +615,14 @@ static int usb_uevent(struct device *dev, struct kobj_uevent_env *env)
/* driver is often null here; dev_dbg() would oops */
pr_debug("usb %s: uevent\n", dev_name(dev));
- if (is_usb_device(dev))
+ if (is_usb_device(dev)) {
usb_dev = to_usb_device(dev);
- else {
+ } else if (is_usb_interface(dev)) {
struct usb_interface *intf = to_usb_interface(dev);
+
usb_dev = interface_to_usbdev(intf);
+ } else {
+ return 0;
}
if (usb_dev->devnum < 0) {
@@ -1762,6 +1750,7 @@ int usb_suspend(struct device *dev, pm_message_t msg)
int usb_resume(struct device *dev, pm_message_t msg)
{
struct usb_device *udev;
+ int status;
udev = to_usb_device(dev);
@@ -1771,7 +1760,14 @@ int usb_resume(struct device *dev, pm_message_t msg)
*/
if (udev->skip_sys_resume)
return 0;
- return usb_external_resume_device(udev, msg);
+ status = usb_external_resume_device(udev, msg);
+
+ /* Avoid PM error messages for devices disconnected while suspended
+ * as we'll display regular disconnect messages just a bit later.
+ */
+ if (status == -ENODEV)
+ return 0;
+ return status;
}
#endif /* CONFIG_PM */
diff --git a/drivers/usb/core/endpoint.c b/drivers/usb/core/endpoint.c
index 40dee2ac0133..bc39fc40bbde 100644
--- a/drivers/usb/core/endpoint.c
+++ b/drivers/usb/core/endpoint.c
@@ -15,19 +15,18 @@
#include <linux/usb.h>
#include "usb.h"
-#define MAX_ENDPOINT_MINORS (64*128*32)
-static int usb_endpoint_major;
-static DEFINE_IDR(endpoint_idr);
-
struct ep_device {
struct usb_endpoint_descriptor *desc;
struct usb_device *udev;
struct device dev;
- int minor;
};
#define to_ep_device(_dev) \
container_of(_dev, struct ep_device, dev)
+struct device_type usb_ep_device_type = {
+ .name = "usb_endpoint",
+};
+
struct ep_attribute {
struct attribute attr;
ssize_t (*show)(struct usb_device *,
@@ -160,118 +159,10 @@ static struct attribute_group *ep_dev_groups[] = {
NULL
};
-static int usb_endpoint_major_init(void)
-{
- dev_t dev;
- int error;
-
- error = alloc_chrdev_region(&dev, 0, MAX_ENDPOINT_MINORS,
- "usb_endpoint");
- if (error) {
- printk(KERN_ERR "Unable to get a dynamic major for "
- "usb endpoints.\n");
- return error;
- }
- usb_endpoint_major = MAJOR(dev);
-
- return error;
-}
-
-static void usb_endpoint_major_cleanup(void)
-{
- unregister_chrdev_region(MKDEV(usb_endpoint_major, 0),
- MAX_ENDPOINT_MINORS);
-}
-
-static int endpoint_get_minor(struct ep_device *ep_dev)
-{
- static DEFINE_MUTEX(minor_lock);
- int retval = -ENOMEM;
- int id;
-
- mutex_lock(&minor_lock);
- if (idr_pre_get(&endpoint_idr, GFP_KERNEL) == 0)
- goto exit;
-
- retval = idr_get_new(&endpoint_idr, ep_dev, &id);
- if (retval < 0) {
- if (retval == -EAGAIN)
- retval = -ENOMEM;
- goto exit;
- }
- ep_dev->minor = id & MAX_ID_MASK;
-exit:
- mutex_unlock(&minor_lock);
- return retval;
-}
-
-static void endpoint_free_minor(struct ep_device *ep_dev)
-{
- idr_remove(&endpoint_idr, ep_dev->minor);
-}
-
-static struct endpoint_class {
- struct kref kref;
- struct class *class;
-} *ep_class;
-
-static int init_endpoint_class(void)
-{
- int result = 0;
-
- if (ep_class != NULL) {
- kref_get(&ep_class->kref);
- goto exit;
- }
-
- ep_class = kmalloc(sizeof(*ep_class), GFP_KERNEL);
- if (!ep_class) {
- result = -ENOMEM;
- goto exit;
- }
-
- kref_init(&ep_class->kref);
- ep_class->class = class_create(THIS_MODULE, "usb_endpoint");
- if (IS_ERR(ep_class->class)) {
- result = PTR_ERR(ep_class->class);
- goto class_create_error;
- }
-
- result = usb_endpoint_major_init();
- if (result)
- goto endpoint_major_error;
-
- goto exit;
-
-endpoint_major_error:
- class_destroy(ep_class->class);
-class_create_error:
- kfree(ep_class);
- ep_class = NULL;
-exit:
- return result;
-}
-
-static void release_endpoint_class(struct kref *kref)
-{
- /* Ok, we cheat as we know we only have one ep_class */
- class_destroy(ep_class->class);
- kfree(ep_class);
- ep_class = NULL;
- usb_endpoint_major_cleanup();
-}
-
-static void destroy_endpoint_class(void)
-{
- if (ep_class)
- kref_put(&ep_class->kref, release_endpoint_class);
-}
-
static void ep_device_release(struct device *dev)
{
struct ep_device *ep_dev = to_ep_device(dev);
- endpoint_free_minor(ep_dev);
kfree(ep_dev);
}
@@ -279,62 +170,32 @@ int usb_create_ep_devs(struct device *parent,
struct usb_host_endpoint *endpoint,
struct usb_device *udev)
{
- char name[8];
struct ep_device *ep_dev;
int retval;
- retval = init_endpoint_class();
- if (retval)
- goto exit;
-
ep_dev = kzalloc(sizeof(*ep_dev), GFP_KERNEL);
if (!ep_dev) {
retval = -ENOMEM;
- goto error_alloc;
- }
-
- retval = endpoint_get_minor(ep_dev);
- if (retval) {
- dev_err(parent, "can not allocate minor number for %s\n",
- dev_name(&ep_dev->dev));
- goto error_register;
+ goto exit;
}
ep_dev->desc = &endpoint->desc;
ep_dev->udev = udev;
ep_dev->dev.groups = ep_dev_groups;
- ep_dev->dev.devt = MKDEV(usb_endpoint_major, ep_dev->minor);
- ep_dev->dev.class = ep_class->class;
+ ep_dev->dev.type = &usb_ep_device_type;
ep_dev->dev.parent = parent;
ep_dev->dev.release = ep_device_release;
- dev_set_name(&ep_dev->dev, "usbdev%d.%d_ep%02x",
- udev->bus->busnum, udev->devnum,
- endpoint->desc.bEndpointAddress);
+ dev_set_name(&ep_dev->dev, "ep_%02x", endpoint->desc.bEndpointAddress);
retval = device_register(&ep_dev->dev);
if (retval)
- goto error_chrdev;
+ goto error_register;
- /* create the symlink to the old-style "ep_XX" directory */
- sprintf(name, "ep_%02x", endpoint->desc.bEndpointAddress);
- retval = sysfs_create_link(&parent->kobj, &ep_dev->dev.kobj, name);
- if (retval)
- goto error_link;
endpoint->ep_dev = ep_dev;
return retval;
-error_link:
- device_unregister(&ep_dev->dev);
- destroy_endpoint_class();
- return retval;
-
-error_chrdev:
- endpoint_free_minor(ep_dev);
-
error_register:
kfree(ep_dev);
-error_alloc:
- destroy_endpoint_class();
exit:
return retval;
}
@@ -344,12 +205,7 @@ void usb_remove_ep_devs(struct usb_host_endpoint *endpoint)
struct ep_device *ep_dev = endpoint->ep_dev;
if (ep_dev) {
- char name[8];
-
- sprintf(name, "ep_%02x", endpoint->desc.bEndpointAddress);
- sysfs_remove_link(&ep_dev->dev.parent->kobj, name);
device_unregister(&ep_dev->dev);
endpoint->ep_dev = NULL;
- destroy_endpoint_class();
}
}
diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index a4301dc02d27..91f2885b6ee1 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -185,194 +185,198 @@ void usb_hcd_pci_remove(struct pci_dev *dev)
}
EXPORT_SYMBOL_GPL(usb_hcd_pci_remove);
-
-#ifdef CONFIG_PM
-
/**
- * usb_hcd_pci_suspend - power management suspend of a PCI-based HCD
- * @dev: USB Host Controller being suspended
- * @message: Power Management message describing this state transition
- *
- * Store this function in the HCD's struct pci_driver as .suspend.
+ * usb_hcd_pci_shutdown - shutdown host controller
+ * @dev: USB Host Controller being shutdown
*/
-int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t message)
+void usb_hcd_pci_shutdown(struct pci_dev *dev)
+{
+ struct usb_hcd *hcd;
+
+ hcd = pci_get_drvdata(dev);
+ if (!hcd)
+ return;
+
+ if (hcd->driver->shutdown)
+ hcd->driver->shutdown(hcd);
+}
+EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);
+
+#ifdef CONFIG_PM_SLEEP
+
+static int check_root_hub_suspended(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
+
+ if (!(hcd->state == HC_STATE_SUSPENDED ||
+ hcd->state == HC_STATE_HALT)) {
+ dev_warn(dev, "Root hub is not suspended\n");
+ return -EBUSY;
+ }
+ return 0;
+}
+
+static int hcd_pci_suspend(struct device *dev)
{
- struct usb_hcd *hcd = pci_get_drvdata(dev);
- int retval = 0;
- int wake, w;
- int has_pci_pm;
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
+ int retval;
/* Root hub suspend should have stopped all downstream traffic,
* and all bus master traffic. And done so for both the interface
* and the stub usb_device (which we check here). But maybe it
* didn't; writing sysfs power/state files ignores such rules...
- *
- * We must ignore the FREEZE vs SUSPEND distinction here, because
- * otherwise the swsusp will save (and restore) garbage state.
*/
- if (!(hcd->state == HC_STATE_SUSPENDED ||
- hcd->state == HC_STATE_HALT)) {
- dev_warn(&dev->dev, "Root hub is not suspended\n");
- retval = -EBUSY;
- goto done;
- }
+ retval = check_root_hub_suspended(dev);
+ if (retval)
+ return retval;
/* We might already be suspended (runtime PM -- not yet written) */
- if (dev->current_state != PCI_D0)
- goto done;
+ if (pci_dev->current_state != PCI_D0)
+ return retval;
if (hcd->driver->pci_suspend) {
- retval = hcd->driver->pci_suspend(hcd, message);
+ retval = hcd->driver->pci_suspend(hcd);
suspend_report_result(hcd->driver->pci_suspend, retval);
if (retval)
- goto done;
+ return retval;
}
- synchronize_irq(dev->irq);
+ synchronize_irq(pci_dev->irq);
/* Downstream ports from this root hub should already be quiesced, so
* there will be no DMA activity. Now we can shut down the upstream
- * link (except maybe for PME# resume signaling) and enter some PCI
- * low power state, if the hardware allows.
+ * link (except maybe for PME# resume signaling). We'll enter a
+ * low power state during suspend_noirq, if the hardware allows.
*/
- pci_disable_device(dev);
+ pci_disable_device(pci_dev);
+ return retval;
+}
+
+static int hcd_pci_suspend_noirq(struct device *dev)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
+ int retval;
+
+ retval = check_root_hub_suspended(dev);
+ if (retval)
+ return retval;
- pci_save_state(dev);
+ pci_save_state(pci_dev);
- /* Don't fail on error to enable wakeup. We rely on pci code
- * to reject requests the hardware can't implement, rather
- * than coding the same thing.
+ /* If the root hub is HALTed rather than SUSPENDed,
+ * disallow remote wakeup.
*/
- wake = (hcd->state == HC_STATE_SUSPENDED &&
- device_may_wakeup(&dev->dev));
- w = pci_wake_from_d3(dev, wake);
- if (w < 0)
- wake = w;
- dev_dbg(&dev->dev, "wakeup: %d\n", wake);
-
- /* Don't change state if we don't need to */
- if (message.event == PM_EVENT_FREEZE ||
- message.event == PM_EVENT_PRETHAW) {
- dev_dbg(&dev->dev, "--> no state change\n");
- goto done;
- }
+ if (hcd->state == HC_STATE_HALT)
+ device_set_wakeup_enable(dev, 0);
+ dev_dbg(dev, "wakeup: %d\n", device_may_wakeup(dev));
- has_pci_pm = pci_find_capability(dev, PCI_CAP_ID_PM);
- if (!has_pci_pm) {
- dev_dbg(&dev->dev, "--> PCI D0 legacy\n");
+ /* Possibly enable remote wakeup,
+ * choose the appropriate low-power state, and go to that state.
+ */
+ retval = pci_prepare_to_sleep(pci_dev);
+ if (retval == -EIO) { /* Low-power not supported */
+ dev_dbg(dev, "--> PCI D0 legacy\n");
+ retval = 0;
+ } else if (retval == 0) {
+ dev_dbg(dev, "--> PCI %s\n",
+ pci_power_name(pci_dev->current_state));
} else {
-
- /* NOTE: dev->current_state becomes nonzero only here, and
- * only for devices that support PCI PM. Also, exiting
- * PCI_D3 (but not PCI_D1 or PCI_D2) is allowed to reset
- * some device state (e.g. as part of clock reinit).
- */
- retval = pci_set_power_state(dev, PCI_D3hot);
- suspend_report_result(pci_set_power_state, retval);
- if (retval == 0) {
- dev_dbg(&dev->dev, "--> PCI D3\n");
- } else {
- dev_dbg(&dev->dev, "PCI D3 suspend fail, %d\n",
- retval);
- pci_restore_state(dev);
- }
+ suspend_report_result(pci_prepare_to_sleep, retval);
+ return retval;
}
#ifdef CONFIG_PPC_PMAC
- if (retval == 0) {
- /* Disable ASIC clocks for USB */
- if (machine_is(powermac)) {
- struct device_node *of_node;
-
- of_node = pci_device_to_OF_node(dev);
- if (of_node)
- pmac_call_feature(PMAC_FTR_USB_ENABLE,
- of_node, 0, 0);
- }
+ /* Disable ASIC clocks for USB */
+ if (machine_is(powermac)) {
+ struct device_node *of_node;
+
+ of_node = pci_device_to_OF_node(pci_dev);
+ if (of_node)
+ pmac_call_feature(PMAC_FTR_USB_ENABLE, of_node, 0, 0);
}
#endif
-
- done:
return retval;
}
-EXPORT_SYMBOL_GPL(usb_hcd_pci_suspend);
-/**
- * usb_hcd_pci_resume - power management resume of a PCI-based HCD
- * @dev: USB Host Controller being resumed
- *
- * Store this function in the HCD's struct pci_driver as .resume.
- */
-int usb_hcd_pci_resume(struct pci_dev *dev)
+static int hcd_pci_resume_noirq(struct device *dev)
{
- struct usb_hcd *hcd;
- int retval;
+ struct pci_dev *pci_dev = to_pci_dev(dev);
#ifdef CONFIG_PPC_PMAC
/* Reenable ASIC clocks for USB */
if (machine_is(powermac)) {
struct device_node *of_node;
- of_node = pci_device_to_OF_node(dev);
+ of_node = pci_device_to_OF_node(pci_dev);
if (of_node)
pmac_call_feature(PMAC_FTR_USB_ENABLE,
of_node, 0, 1);
}
#endif
- pci_restore_state(dev);
+ /* Go back to D0 and disable remote wakeup */
+ pci_back_from_sleep(pci_dev);
+ return 0;
+}
+
+static int resume_common(struct device *dev, bool hibernated)
+{
+ struct pci_dev *pci_dev = to_pci_dev(dev);
+ struct usb_hcd *hcd = pci_get_drvdata(pci_dev);
+ int retval;
- hcd = pci_get_drvdata(dev);
if (hcd->state != HC_STATE_SUSPENDED) {
- dev_dbg(hcd->self.controller,
- "can't resume, not suspended!\n");
+ dev_dbg(dev, "can't resume, not suspended!\n");
return 0;
}
- pci_enable_wake(dev, PCI_D0, false);
-
- retval = pci_enable_device(dev);
+ retval = pci_enable_device(pci_dev);
if (retval < 0) {
- dev_err(&dev->dev, "can't re-enable after resume, %d!\n",
- retval);
+ dev_err(dev, "can't re-enable after resume, %d!\n", retval);
return retval;
}
- pci_set_master(dev);
-
- /* yes, ignore this result too... */
- (void) pci_wake_from_d3(dev, 0);
+ pci_set_master(pci_dev);
clear_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);
if (hcd->driver->pci_resume) {
- retval = hcd->driver->pci_resume(hcd);
+ retval = hcd->driver->pci_resume(hcd, hibernated);
if (retval) {
- dev_err(hcd->self.controller,
- "PCI post-resume error %d!\n", retval);
+ dev_err(dev, "PCI post-resume error %d!\n", retval);
usb_hc_died(hcd);
}
}
return retval;
}
-EXPORT_SYMBOL_GPL(usb_hcd_pci_resume);
-#endif /* CONFIG_PM */
-
-/**
- * usb_hcd_pci_shutdown - shutdown host controller
- * @dev: USB Host Controller being shutdown
- */
-void usb_hcd_pci_shutdown(struct pci_dev *dev)
+static int hcd_pci_resume(struct device *dev)
{
- struct usb_hcd *hcd;
-
- hcd = pci_get_drvdata(dev);
- if (!hcd)
- return;
+ return resume_common(dev, false);
+}
- if (hcd->driver->shutdown)
- hcd->driver->shutdown(hcd);
+static int hcd_pci_restore(struct device *dev)
+{
+ return resume_common(dev, true);
}
-EXPORT_SYMBOL_GPL(usb_hcd_pci_shutdown);
+struct dev_pm_ops usb_hcd_pci_pm_ops = {
+ .suspend = hcd_pci_suspend,
+ .suspend_noirq = hcd_pci_suspend_noirq,
+ .resume_noirq = hcd_pci_resume_noirq,
+ .resume = hcd_pci_resume,
+ .freeze = check_root_hub_suspended,
+ .freeze_noirq = check_root_hub_suspended,
+ .thaw_noirq = NULL,
+ .thaw = NULL,
+ .poweroff = hcd_pci_suspend,
+ .poweroff_noirq = hcd_pci_suspend_noirq,
+ .restore_noirq = hcd_pci_resume_noirq,
+ .restore = hcd_pci_restore,
+};
+EXPORT_SYMBOL_GPL(usb_hcd_pci_pm_ops);
+
+#endif /* CONFIG_PM_SLEEP */
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 42b93da1085d..ce3f453f02ef 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -128,6 +128,27 @@ static inline int is_root_hub(struct usb_device *udev)
#define KERNEL_REL ((LINUX_VERSION_CODE >> 16) & 0x0ff)
#define KERNEL_VER ((LINUX_VERSION_CODE >> 8) & 0x0ff)
+/* usb 3.0 root hub device descriptor */
+static const u8 usb3_rh_dev_descriptor[18] = {
+ 0x12, /* __u8 bLength; */
+ 0x01, /* __u8 bDescriptorType; Device */
+ 0x00, 0x03, /* __le16 bcdUSB; v3.0 */
+
+ 0x09, /* __u8 bDeviceClass; HUB_CLASSCODE */
+ 0x00, /* __u8 bDeviceSubClass; */
+ 0x03, /* __u8 bDeviceProtocol; USB 3.0 hub */
+ 0x09, /* __u8 bMaxPacketSize0; 2^9 = 512 Bytes */
+
+ 0x6b, 0x1d, /* __le16 idVendor; Linux Foundation */
+ 0x02, 0x00, /* __le16 idProduct; device 0x0002 */
+ KERNEL_VER, KERNEL_REL, /* __le16 bcdDevice */
+
+ 0x03, /* __u8 iManufacturer; */
+ 0x02, /* __u8 iProduct; */
+ 0x01, /* __u8 iSerialNumber; */
+ 0x01 /* __u8 bNumConfigurations; */
+};
+
/* usb 2.0 root hub device descriptor */
static const u8 usb2_rh_dev_descriptor [18] = {
0x12, /* __u8 bLength; */
@@ -273,6 +294,47 @@ static const u8 hs_rh_config_descriptor [] = {
0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */
};
+static const u8 ss_rh_config_descriptor[] = {
+ /* one configuration */
+ 0x09, /* __u8 bLength; */
+ 0x02, /* __u8 bDescriptorType; Configuration */
+ 0x19, 0x00, /* __le16 wTotalLength; FIXME */
+ 0x01, /* __u8 bNumInterfaces; (1) */
+ 0x01, /* __u8 bConfigurationValue; */
+ 0x00, /* __u8 iConfiguration; */
+ 0xc0, /* __u8 bmAttributes;
+ Bit 7: must be set,
+ 6: Self-powered,
+ 5: Remote wakeup,
+ 4..0: resvd */
+ 0x00, /* __u8 MaxPower; */
+
+ /* one interface */
+ 0x09, /* __u8 if_bLength; */
+ 0x04, /* __u8 if_bDescriptorType; Interface */
+ 0x00, /* __u8 if_bInterfaceNumber; */
+ 0x00, /* __u8 if_bAlternateSetting; */
+ 0x01, /* __u8 if_bNumEndpoints; */
+ 0x09, /* __u8 if_bInterfaceClass; HUB_CLASSCODE */
+ 0x00, /* __u8 if_bInterfaceSubClass; */
+ 0x00, /* __u8 if_bInterfaceProtocol; */
+ 0x00, /* __u8 if_iInterface; */
+
+ /* one endpoint (status change endpoint) */
+ 0x07, /* __u8 ep_bLength; */
+ 0x05, /* __u8 ep_bDescriptorType; Endpoint */
+ 0x81, /* __u8 ep_bEndpointAddress; IN Endpoint 1 */
+ 0x03, /* __u8 ep_bmAttributes; Interrupt */
+ /* __le16 ep_wMaxPacketSize; 1 + (MAX_ROOT_PORTS / 8)
+ * see hub.c:hub_configure() for details. */
+ (USB_MAXCHILDREN + 1 + 7) / 8, 0x00,
+ 0x0c /* __u8 ep_bInterval; (256ms -- usb 2.0 spec) */
+ /*
+ * All 3.0 hubs should have an endpoint companion descriptor,
+ * but we're ignoring that for now. FIXME?
+ */
+};
+
/*-------------------------------------------------------------------------*/
/*
@@ -426,23 +488,39 @@ static int rh_call_control (struct usb_hcd *hcd, struct urb *urb)
case DeviceRequest | USB_REQ_GET_DESCRIPTOR:
switch (wValue & 0xff00) {
case USB_DT_DEVICE << 8:
- if (hcd->driver->flags & HCD_USB2)
+ switch (hcd->driver->flags & HCD_MASK) {
+ case HCD_USB3:
+ bufp = usb3_rh_dev_descriptor;
+ break;
+ case HCD_USB2:
bufp = usb2_rh_dev_descriptor;
- else if (hcd->driver->flags & HCD_USB11)
+ break;
+ case HCD_USB11:
bufp = usb11_rh_dev_descriptor;
- else
+ break;
+ default:
goto error;
+ }
len = 18;
if (hcd->has_tt)
patch_protocol = 1;
break;
case USB_DT_CONFIG << 8:
- if (hcd->driver->flags & HCD_USB2) {
+ switch (hcd->driver->flags & HCD_MASK) {
+ case HCD_USB3:
+ bufp = ss_rh_config_descriptor;
+ len = sizeof ss_rh_config_descriptor;
+ break;
+ case HCD_USB2:
bufp = hs_rh_config_descriptor;
len = sizeof hs_rh_config_descriptor;
- } else {
+ break;
+ case HCD_USB11:
bufp = fs_rh_config_descriptor;
len = sizeof fs_rh_config_descriptor;
+ break;
+ default:
+ goto error;
}
if (device_can_wakeup(&hcd->self.root_hub->dev))
patch_wakeup = 1;
@@ -755,23 +833,6 @@ static struct attribute_group usb_bus_attr_group = {
/*-------------------------------------------------------------------------*/
-static struct class *usb_host_class;
-
-int usb_host_init(void)
-{
- int retval = 0;
-
- usb_host_class = class_create(THIS_MODULE, "usb_host");
- if (IS_ERR(usb_host_class))
- retval = PTR_ERR(usb_host_class);
- return retval;
-}
-
-void usb_host_cleanup(void)
-{
- class_destroy(usb_host_class);
-}
-
/**
* usb_bus_init - shared initialization code
* @bus: the bus structure being initialized
@@ -818,12 +879,6 @@ static int usb_register_bus(struct usb_bus *bus)
set_bit (busnum, busmap.busmap);
bus->busnum = busnum;
- bus->dev = device_create(usb_host_class, bus->controller, MKDEV(0, 0),
- bus, "usb_host%d", busnum);
- result = PTR_ERR(bus->dev);
- if (IS_ERR(bus->dev))
- goto error_create_class_dev;
-
/* Add it to the local list of buses */
list_add (&bus->bus_list, &usb_bus_list);
mutex_unlock(&usb_bus_list_lock);
@@ -834,8 +889,6 @@ static int usb_register_bus(struct usb_bus *bus)
"number %d\n", bus->busnum);
return 0;
-error_create_class_dev:
- clear_bit(busnum, busmap.busmap);
error_find_busnum:
mutex_unlock(&usb_bus_list_lock);
return result;
@@ -865,8 +918,6 @@ static void usb_deregister_bus (struct usb_bus *bus)
usb_notify_remove_bus(bus);
clear_bit (bus->busnum, busmap.busmap);
-
- device_unregister(bus->dev);
}
/**
@@ -1199,7 +1250,8 @@ static int map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
/* Map the URB's buffers for DMA access.
* Lower level HCD code should use *_dma exclusively,
- * unless it uses pio or talks to another transport.
+ * unless it uses pio or talks to another transport,
+ * or uses the provided scatter gather list for bulk.
*/
if (is_root_hub(urb->dev))
return 0;
@@ -1520,6 +1572,92 @@ rescan:
}
}
+/* Check whether a new configuration or alt setting for an interface
+ * will exceed the bandwidth for the bus (or the host controller resources).
+ * Only pass in a non-NULL config or interface, not both!
+ * Passing NULL for both new_config and new_intf means the device will be
+ * de-configured by issuing a set configuration 0 command.
+ */
+int usb_hcd_check_bandwidth(struct usb_device *udev,
+ struct usb_host_config *new_config,
+ struct usb_interface *new_intf)
+{
+ int num_intfs, i, j;
+ struct usb_interface_cache *intf_cache;
+ struct usb_host_interface *alt = 0;
+ int ret = 0;
+ struct usb_hcd *hcd;
+ struct usb_host_endpoint *ep;
+
+ hcd = bus_to_hcd(udev->bus);
+ if (!hcd->driver->check_bandwidth)
+ return 0;
+
+ /* Configuration is being removed - set configuration 0 */
+ if (!new_config && !new_intf) {
+ for (i = 1; i < 16; ++i) {
+ ep = udev->ep_out[i];
+ if (ep)
+ hcd->driver->drop_endpoint(hcd, udev, ep);
+ ep = udev->ep_in[i];
+ if (ep)
+ hcd->driver->drop_endpoint(hcd, udev, ep);
+ }
+ hcd->driver->check_bandwidth(hcd, udev);
+ return 0;
+ }
+ /* Check if the HCD says there's enough bandwidth. Enable all endpoints
+ * each interface's alt setting 0 and ask the HCD to check the bandwidth
+ * of the bus. There will always be bandwidth for endpoint 0, so it's
+ * ok to exclude it.
+ */
+ if (new_config) {
+ num_intfs = new_config->desc.bNumInterfaces;
+ /* Remove endpoints (except endpoint 0, which is always on the
+ * schedule) from the old config from the schedule
+ */
+ for (i = 1; i < 16; ++i) {
+ ep = udev->ep_out[i];
+ if (ep) {
+ ret = hcd->driver->drop_endpoint(hcd, udev, ep);
+ if (ret < 0)
+ goto reset;
+ }
+ ep = udev->ep_in[i];
+ if (ep) {
+ ret = hcd->driver->drop_endpoint(hcd, udev, ep);
+ if (ret < 0)
+ goto reset;
+ }
+ }
+ for (i = 0; i < num_intfs; ++i) {
+
+ /* Dig the endpoints for alt setting 0 out of the
+ * interface cache for this interface
+ */
+ intf_cache = new_config->intf_cache[i];
+ for (j = 0; j < intf_cache->num_altsetting; j++) {
+ if (intf_cache->altsetting[j].desc.bAlternateSetting == 0)
+ alt = &intf_cache->altsetting[j];
+ }
+ if (!alt) {
+ printk(KERN_DEBUG "Did not find alt setting 0 for intf %d\n", i);
+ continue;
+ }
+ for (j = 0; j < alt->desc.bNumEndpoints; j++) {
+ ret = hcd->driver->add_endpoint(hcd, udev, &alt->endpoint[j]);
+ if (ret < 0)
+ goto reset;
+ }
+ }
+ }
+ ret = hcd->driver->check_bandwidth(hcd, udev);
+reset:
+ if (ret < 0)
+ hcd->driver->reset_bandwidth(hcd, udev);
+ return ret;
+}
+
/* Disables the endpoint: synchronizes with the hcd to make sure all
* endpoint state is gone from hardware. usb_hcd_flush_endpoint() must
* have been called previously. Use for set_configuration, set_interface,
@@ -1897,8 +2035,20 @@ int usb_add_hcd(struct usb_hcd *hcd,
retval = -ENOMEM;
goto err_allocate_root_hub;
}
- rhdev->speed = (hcd->driver->flags & HCD_USB2) ? USB_SPEED_HIGH :
- USB_SPEED_FULL;
+
+ switch (hcd->driver->flags & HCD_MASK) {
+ case HCD_USB11:
+ rhdev->speed = USB_SPEED_FULL;
+ break;
+ case HCD_USB2:
+ rhdev->speed = USB_SPEED_HIGH;
+ break;
+ case HCD_USB3:
+ rhdev->speed = USB_SPEED_SUPER;
+ break;
+ default:
+ goto err_allocate_root_hub;
+ }
hcd->self.root_hub = rhdev;
/* wakeup flag init defaults to "everything works" for root hubs,
diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h
index e7d4479de41c..d397ecfd5b17 100644
--- a/drivers/usb/core/hcd.h
+++ b/drivers/usb/core/hcd.h
@@ -173,6 +173,8 @@ struct hc_driver {
#define HCD_LOCAL_MEM 0x0002 /* HC needs local memory */
#define HCD_USB11 0x0010 /* USB 1.1 */
#define HCD_USB2 0x0020 /* USB 2.0 */
+#define HCD_USB3 0x0040 /* USB 3.0 */
+#define HCD_MASK 0x0070
/* called to init HCD and root hub */
int (*reset) (struct usb_hcd *hcd);
@@ -182,10 +184,10 @@ struct hc_driver {
* a whole, not just the root hub; they're for PCI bus glue.
*/
/* called after suspending the hub, before entering D3 etc */
- int (*pci_suspend) (struct usb_hcd *hcd, pm_message_t message);
+ int (*pci_suspend)(struct usb_hcd *hcd);
/* called after entering D0 (etc), before resuming the hub */
- int (*pci_resume) (struct usb_hcd *hcd);
+ int (*pci_resume)(struct usb_hcd *hcd, bool hibernated);
/* cleanly make HCD stop writing memory and doing I/O */
void (*stop) (struct usb_hcd *hcd);
@@ -224,6 +226,43 @@ struct hc_driver {
void (*relinquish_port)(struct usb_hcd *, int);
/* has a port been handed over to a companion? */
int (*port_handed_over)(struct usb_hcd *, int);
+
+ /* xHCI specific functions */
+ /* Called by usb_alloc_dev to alloc HC device structures */
+ int (*alloc_dev)(struct usb_hcd *, struct usb_device *);
+ /* Called by usb_release_dev to free HC device structures */
+ void (*free_dev)(struct usb_hcd *, struct usb_device *);
+
+ /* Bandwidth computation functions */
+ /* Note that add_endpoint() can only be called once per endpoint before
+ * check_bandwidth() or reset_bandwidth() must be called.
+ * drop_endpoint() can only be called once per endpoint also.
+ * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will
+ * add the endpoint to the schedule with possibly new parameters denoted by a
+ * different endpoint descriptor in usb_host_endpoint.
+ * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is
+ * not allowed.
+ */
+ /* Allocate endpoint resources and add them to a new schedule */
+ int (*add_endpoint)(struct usb_hcd *, struct usb_device *, struct usb_host_endpoint *);
+ /* Drop an endpoint from a new schedule */
+ int (*drop_endpoint)(struct usb_hcd *, struct usb_device *, struct usb_host_endpoint *);
+ /* Check that a new hardware configuration, set using
+ * endpoint_enable and endpoint_disable, does not exceed bus
+ * bandwidth. This must be called before any set configuration
+ * or set interface requests are sent to the device.
+ */
+ int (*check_bandwidth)(struct usb_hcd *, struct usb_device *);
+ /* Reset the device schedule to the last known good schedule,
+ * which was set from a previous successful call to
+ * check_bandwidth(). This reverts any add_endpoint() and
+ * drop_endpoint() calls since that last successful call.
+ * Used for when a check_bandwidth() call fails due to resource
+ * or bandwidth constraints.
+ */
+ void (*reset_bandwidth)(struct usb_hcd *, struct usb_device *);
+ /* Returns the hardware-chosen device address */
+ int (*address_device)(struct usb_hcd *, struct usb_device *udev);
};
extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);
@@ -242,6 +281,9 @@ extern void usb_hcd_disable_endpoint(struct usb_device *udev,
extern void usb_hcd_reset_endpoint(struct usb_device *udev,
struct usb_host_endpoint *ep);
extern void usb_hcd_synchronize_unlinks(struct usb_device *udev);
+extern int usb_hcd_check_bandwidth(struct usb_device *udev,
+ struct usb_host_config *new_config,
+ struct usb_interface *new_intf);
extern int usb_hcd_get_frame_number(struct usb_device *udev);
extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver,
@@ -261,14 +303,11 @@ struct pci_device_id;
extern int usb_hcd_pci_probe(struct pci_dev *dev,
const struct pci_device_id *id);
extern void usb_hcd_pci_remove(struct pci_dev *dev);
-
-#ifdef CONFIG_PM
-extern int usb_hcd_pci_suspend(struct pci_dev *dev, pm_message_t msg);
-extern int usb_hcd_pci_resume(struct pci_dev *dev);
-#endif /* CONFIG_PM */
-
extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
+#ifdef CONFIG_PM_SLEEP
+extern struct dev_pm_ops usb_hcd_pci_pm_ops;
+#endif
#endif /* CONFIG_PCI */
/* pci-ish (pdev null is ok) buffer alloc/mapping support */
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index be86ae3f4088..2af3b4f06054 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -155,6 +155,8 @@ static inline char *portspeed(int portstatus)
return "480 Mb/s";
else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED))
return "1.5 Mb/s";
+ else if (portstatus & (1 << USB_PORT_FEAT_SUPERSPEED))
+ return "5.0 Gb/s";
else
return "12 Mb/s";
}
@@ -457,13 +459,13 @@ static void hub_tt_kevent (struct work_struct *work)
spin_lock_irqsave (&hub->tt.lock, flags);
while (--limit && !list_empty (&hub->tt.clear_list)) {
- struct list_head *temp;
+ struct list_head *next;
struct usb_tt_clear *clear;
struct usb_device *hdev = hub->hdev;
int status;
- temp = hub->tt.clear_list.next;
- clear = list_entry (temp, struct usb_tt_clear, clear_list);
+ next = hub->tt.clear_list.next;
+ clear = list_entry (next, struct usb_tt_clear, clear_list);
list_del (&clear->clear_list);
/* drop lock so HCD can concurrently report other TT errors */
@@ -951,6 +953,9 @@ static int hub_configure(struct usb_hub *hub,
ret);
hub->tt.hub = hdev;
break;
+ case 3:
+ /* USB 3.0 hubs don't have a TT */
+ break;
default:
dev_dbg(hub_dev, "Unrecognized hub protocol %d\n",
hdev->descriptor.bDeviceProtocol);
@@ -1323,6 +1328,11 @@ EXPORT_SYMBOL_GPL(usb_set_device_state);
* 0 is reserved by USB for default address; (b) Linux's USB stack
* uses always #1 for the root hub of the controller. So USB stack's
* port #1, which is wusb virtual-port #0 has address #2.
+ *
+ * Devices connected under xHCI are not as simple. The host controller
+ * supports virtualization, so the hardware assigns device addresses and
+ * the HCD must setup data structures before issuing a set address
+ * command to the hardware.
*/
static void choose_address(struct usb_device *udev)
{
@@ -1642,6 +1652,9 @@ int usb_new_device(struct usb_device *udev)
err = usb_configure_device(udev); /* detect & probe dev/intfs */
if (err < 0)
goto fail;
+ dev_dbg(&udev->dev, "udev %d, busnum %d, minor = %d\n",
+ udev->devnum, udev->bus->busnum,
+ (((udev->bus->busnum-1) * 128) + (udev->devnum-1)));
/* export the usbdev device-node for libusb */
udev->dev.devt = MKDEV(USB_DEVICE_MAJOR,
(((udev->bus->busnum-1) * 128) + (udev->devnum-1)));
@@ -2395,19 +2408,29 @@ EXPORT_SYMBOL_GPL(usb_ep0_reinit);
static int hub_set_address(struct usb_device *udev, int devnum)
{
int retval;
+ struct usb_hcd *hcd = bus_to_hcd(udev->bus);
- if (devnum <= 1)
+ /*
+ * The host controller will choose the device address,
+ * instead of the core having chosen it earlier
+ */
+ if (!hcd->driver->address_device && devnum <= 1)
return -EINVAL;
if (udev->state == USB_STATE_ADDRESS)
return 0;
if (udev->state != USB_STATE_DEFAULT)
return -EINVAL;
- retval = usb_control_msg(udev, usb_sndaddr0pipe(),
- USB_REQ_SET_ADDRESS, 0, devnum, 0,
- NULL, 0, USB_CTRL_SET_TIMEOUT);
+ if (hcd->driver->address_device) {
+ retval = hcd->driver->address_device(hcd, udev);
+ } else {
+ retval = usb_control_msg(udev, usb_sndaddr0pipe(),
+ USB_REQ_SET_ADDRESS, 0, devnum, 0,
+ NULL, 0, USB_CTRL_SET_TIMEOUT);
+ if (retval == 0)
+ update_address(udev, devnum);
+ }
if (retval == 0) {
/* Device now using proper address. */
- update_address(udev, devnum);
usb_set_device_state(udev, USB_STATE_ADDRESS);
usb_ep0_reinit(udev);
}
@@ -2430,6 +2453,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
static DEFINE_MUTEX(usb_address0_mutex);
struct usb_device *hdev = hub->hdev;
+ struct usb_hcd *hcd = bus_to_hcd(hdev->bus);
int i, j, retval;
unsigned delay = HUB_SHORT_RESET_TIME;
enum usb_device_speed oldspeed = udev->speed;
@@ -2452,11 +2476,24 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
mutex_lock(&usb_address0_mutex);
- /* Reset the device; full speed may morph to high speed */
- retval = hub_port_reset(hub, port1, udev, delay);
- if (retval < 0) /* error or disconnect */
+ if ((hcd->driver->flags & HCD_USB3) && udev->config) {
+ /* FIXME this will need special handling by the xHCI driver. */
+ dev_dbg(&udev->dev,
+ "xHCI reset of configured device "
+ "not supported yet.\n");
+ retval = -EINVAL;
goto fail;
- /* success, speed is known */
+ } else if (!udev->config && oldspeed == USB_SPEED_SUPER) {
+ /* Don't reset USB 3.0 devices during an initial setup */
+ usb_set_device_state(udev, USB_STATE_DEFAULT);
+ } else {
+ /* Reset the device; full speed may morph to high speed */
+ /* FIXME a USB 2.0 device may morph into SuperSpeed on reset. */
+ retval = hub_port_reset(hub, port1, udev, delay);
+ if (retval < 0) /* error or disconnect */
+ goto fail;
+ /* success, speed is known */
+ }
retval = -ENODEV;
if (oldspeed != USB_SPEED_UNKNOWN && oldspeed != udev->speed) {
@@ -2471,6 +2508,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
* reported as 0xff in the device descriptor). WUSB1.0[4.8.1].
*/
switch (udev->speed) {
+ case USB_SPEED_SUPER:
case USB_SPEED_VARIABLE: /* fixed at 512 */
udev->ep0.desc.wMaxPacketSize = cpu_to_le16(512);
break;
@@ -2496,16 +2534,20 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
case USB_SPEED_LOW: speed = "low"; break;
case USB_SPEED_FULL: speed = "full"; break;
case USB_SPEED_HIGH: speed = "high"; break;
+ case USB_SPEED_SUPER:
+ speed = "super";
+ break;
case USB_SPEED_VARIABLE:
speed = "variable";
type = "Wireless ";
break;
default: speed = "?"; break;
}
- dev_info (&udev->dev,
- "%s %s speed %sUSB device using %s and address %d\n",
- (udev->config) ? "reset" : "new", speed, type,
- udev->bus->controller->driver->name, devnum);
+ if (udev->speed != USB_SPEED_SUPER)
+ dev_info(&udev->dev,
+ "%s %s speed %sUSB device using %s and address %d\n",
+ (udev->config) ? "reset" : "new", speed, type,
+ udev->bus->controller->driver->name, devnum);
/* Set up TT records, if needed */
if (hdev->tt) {
@@ -2530,7 +2572,11 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
* value.
*/
for (i = 0; i < GET_DESCRIPTOR_TRIES; (++i, msleep(100))) {
- if (USE_NEW_SCHEME(retry_counter)) {
+ /*
+ * An xHCI controller cannot send any packets to a device until
+ * a set address command successfully completes.
+ */
+ if (USE_NEW_SCHEME(retry_counter) && !(hcd->driver->flags & HCD_USB3)) {
struct usb_device_descriptor *buf;
int r = 0;
@@ -2596,7 +2642,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
* unauthorized address in the Connect Ack sequence;
* authorization will assign the final address.
*/
- if (udev->wusb == 0) {
+ if (udev->wusb == 0) {
for (j = 0; j < SET_ADDRESS_TRIES; ++j) {
retval = hub_set_address(udev, devnum);
if (retval >= 0)
@@ -2609,13 +2655,20 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
devnum, retval);
goto fail;
}
+ if (udev->speed == USB_SPEED_SUPER) {
+ devnum = udev->devnum;
+ dev_info(&udev->dev,
+ "%s SuperSpeed USB device using %s and address %d\n",
+ (udev->config) ? "reset" : "new",
+ udev->bus->controller->driver->name, devnum);
+ }
/* cope with hardware quirkiness:
* - let SET_ADDRESS settle, some device hardware wants it
* - read ep0 maxpacket even for high and low speed,
*/
msleep(10);
- if (USE_NEW_SCHEME(retry_counter))
+ if (USE_NEW_SCHEME(retry_counter) && !(hcd->driver->flags & HCD_USB3))
break;
}
@@ -2634,8 +2687,11 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
if (retval)
goto fail;
- i = udev->descriptor.bMaxPacketSize0 == 0xff? /* wusb device? */
- 512 : udev->descriptor.bMaxPacketSize0;
+ if (udev->descriptor.bMaxPacketSize0 == 0xff ||
+ udev->speed == USB_SPEED_SUPER)
+ i = 512;
+ else
+ i = udev->descriptor.bMaxPacketSize0;
if (le16_to_cpu(udev->ep0.desc.wMaxPacketSize) != i) {
if (udev->speed != USB_SPEED_FULL ||
!(i == 8 || i == 16 || i == 32 || i == 64)) {
@@ -2847,19 +2903,41 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
}
usb_set_device_state(udev, USB_STATE_POWERED);
- udev->speed = USB_SPEED_UNKNOWN;
udev->bus_mA = hub->mA_per_port;
udev->level = hdev->level + 1;
udev->wusb = hub_is_wusb(hub);
- /* set the address */
- choose_address(udev);
- if (udev->devnum <= 0) {
- status = -ENOTCONN; /* Don't retry */
- goto loop;
+ /*
+ * USB 3.0 devices are reset automatically before the connect
+ * port status change appears, and the root hub port status
+ * shows the correct speed. We also get port change
+ * notifications for USB 3.0 devices from the USB 3.0 portion of
+ * an external USB 3.0 hub, but this isn't handled correctly yet
+ * FIXME.
+ */
+
+ if (!(hcd->driver->flags & HCD_USB3))
+ udev->speed = USB_SPEED_UNKNOWN;
+ else if ((hdev->parent == NULL) &&
+ (portstatus & (1 << USB_PORT_FEAT_SUPERSPEED)))
+ udev->speed = USB_SPEED_SUPER;
+ else
+ udev->speed = USB_SPEED_UNKNOWN;
+
+ /*
+ * xHCI needs to issue an address device command later
+ * in the hub_port_init sequence for SS/HS/FS/LS devices.
+ */
+ if (!(hcd->driver->flags & HCD_USB3)) {
+ /* set the address */
+ choose_address(udev);
+ if (udev->devnum <= 0) {
+ status = -ENOTCONN; /* Don't retry */
+ goto loop;
+ }
}
- /* reset and get descriptor */
+ /* reset (non-USB 3.0 devices) and get descriptor */
status = hub_port_init(hub, udev, port1, i);
if (status < 0)
goto loop;
diff --git a/drivers/usb/core/hub.h b/drivers/usb/core/hub.h
index 2a116ce53c9b..889c0f32a40b 100644
--- a/drivers/usb/core/hub.h
+++ b/drivers/usb/core/hub.h
@@ -47,7 +47,10 @@
#define USB_PORT_FEAT_L1 5 /* L1 suspend */
#define USB_PORT_FEAT_POWER 8
#define USB_PORT_FEAT_LOWSPEED 9
+/* This value was never in Table 11-17 */
#define USB_PORT_FEAT_HIGHSPEED 10
+/* This value is also fake */
+#define USB_PORT_FEAT_SUPERSPEED 11
#define USB_PORT_FEAT_C_CONNECTION 16
#define USB_PORT_FEAT_C_ENABLE 17
#define USB_PORT_FEAT_C_SUSPEND 18
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index b62628377654..2bed83caacb1 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -10,6 +10,7 @@
#include <linux/mm.h>
#include <linux/timer.h>
#include <linux/ctype.h>
+#include <linux/nls.h>
#include <linux/device.h>
#include <linux/scatterlist.h>
#include <linux/usb/quirks.h>
@@ -364,6 +365,7 @@ int usb_sg_init(struct usb_sg_request *io, struct usb_device *dev,
int i;
int urb_flags;
int dma;
+ int use_sg;
if (!io || !dev || !sg
|| usb_pipecontrol(pipe)
@@ -391,7 +393,19 @@ int usb_sg_init(struct usb_sg_request *io, struct usb_device *dev,
if (io->entries <= 0)
return io->entries;
- io->urbs = kmalloc(io->entries * sizeof *io->urbs, mem_flags);
+ /* If we're running on an xHCI host controller, queue the whole scatter
+ * gather list with one call to urb_enqueue(). This is only for bulk,
+ * as that endpoint type does not care how the data gets broken up
+ * across frames.
+ */
+ if (usb_pipebulk(pipe) &&
+ bus_to_hcd(dev->bus)->driver->flags & HCD_USB3) {
+ io->urbs = kmalloc(sizeof *io->urbs, mem_flags);
+ use_sg = true;
+ } else {
+ io->urbs = kmalloc(io->entries * sizeof *io->urbs, mem_flags);
+ use_sg = false;
+ }
if (!io->urbs)
goto nomem;
@@ -401,62 +415,92 @@ int usb_sg_init(struct usb_sg_request *io, struct usb_device *dev,
if (usb_pipein(pipe))
urb_flags |= URB_SHORT_NOT_OK;
- for_each_sg(sg, sg, io->entries, i) {
- unsigned len;
-
- io->urbs[i] = usb_alloc_urb(0, mem_flags);
- if (!io->urbs[i]) {
- io->entries = i;
+ if (use_sg) {
+ io->urbs[0] = usb_alloc_urb(0, mem_flags);
+ if (!io->urbs[0]) {
+ io->entries = 0;
goto nomem;
}
- io->urbs[i]->dev = NULL;
- io->urbs[i]->pipe = pipe;
- io->urbs[i]->interval = period;
- io->urbs[i]->transfer_flags = urb_flags;
-
- io->urbs[i]->complete = sg_complete;
- io->urbs[i]->context = io;
-
- /*
- * Some systems need to revert to PIO when DMA is temporarily
- * unavailable. For their sakes, both transfer_buffer and
- * transfer_dma are set when possible. However this can only
- * work on systems without:
- *
- * - HIGHMEM, since DMA buffers located in high memory are
- * not directly addressable by the CPU for PIO;
- *
- * - IOMMU, since dma_map_sg() is allowed to use an IOMMU to
- * make virtually discontiguous buffers be "dma-contiguous"
- * so that PIO and DMA need diferent numbers of URBs.
- *
- * So when HIGHMEM or IOMMU are in use, transfer_buffer is NULL
- * to prevent stale pointers and to help spot bugs.
- */
- if (dma) {
- io->urbs[i]->transfer_dma = sg_dma_address(sg);
- len = sg_dma_len(sg);
+ io->urbs[0]->dev = NULL;
+ io->urbs[0]->pipe = pipe;
+ io->urbs[0]->interval = period;
+ io->urbs[0]->transfer_flags = urb_flags;
+
+ io->urbs[0]->complete = sg_complete;
+ io->urbs[0]->context = io;
+ /* A length of zero means transfer the whole sg list */
+ io->urbs[0]->transfer_buffer_length = length;
+ if (length == 0) {
+ for_each_sg(sg, sg, io->entries, i) {
+ io->urbs[0]->transfer_buffer_length +=
+ sg_dma_len(sg);
+ }
+ }
+ io->urbs[0]->sg = io;
+ io->urbs[0]->num_sgs = io->entries;
+ io->entries = 1;
+ } else {
+ for_each_sg(sg, sg, io->entries, i) {
+ unsigned len;
+
+ io->urbs[i] = usb_alloc_urb(0, mem_flags);
+ if (!io->urbs[i]) {
+ io->entries = i;
+ goto nomem;
+ }
+
+ io->urbs[i]->dev = NULL;
+ io->urbs[i]->pipe = pipe;
+ io->urbs[i]->interval = period;
+ io->urbs[i]->transfer_flags = urb_flags;
+
+ io->urbs[i]->complete = sg_complete;
+ io->urbs[i]->context = io;
+
+ /*
+ * Some systems need to revert to PIO when DMA is
+ * temporarily unavailable. For their sakes, both
+ * transfer_buffer and transfer_dma are set when
+ * possible. However this can only work on systems
+ * without:
+ *
+ * - HIGHMEM, since DMA buffers located in high memory
+ * are not directly addressable by the CPU for PIO;
+ *
+ * - IOMMU, since dma_map_sg() is allowed to use an
+ * IOMMU to make virtually discontiguous buffers be
+ * "dma-contiguous" so that PIO and DMA need diferent
+ * numbers of URBs.
+ *
+ * So when HIGHMEM or IOMMU are in use, transfer_buffer
+ * is NULL to prevent stale pointers and to help spot
+ * bugs.
+ */
+ if (dma) {
+ io->urbs[i]->transfer_dma = sg_dma_address(sg);
+ len = sg_dma_len(sg);
#if defined(CONFIG_HIGHMEM) || defined(CONFIG_GART_IOMMU)
- io->urbs[i]->transfer_buffer = NULL;
+ io->urbs[i]->transfer_buffer = NULL;
#else
- io->urbs[i]->transfer_buffer = sg_virt(sg);
+ io->urbs[i]->transfer_buffer = sg_virt(sg);
#endif
- } else {
- /* hc may use _only_ transfer_buffer */
- io->urbs[i]->transfer_buffer = sg_virt(sg);
- len = sg->length;
- }
+ } else {
+ /* hc may use _only_ transfer_buffer */
+ io->urbs[i]->transfer_buffer = sg_virt(sg);
+ len = sg->length;
+ }
- if (length) {
- len = min_t(unsigned, len, length);
- length -= len;
- if (length == 0)
- io->entries = i + 1;
+ if (length) {
+ len = min_t(unsigned, len, length);
+ length -= len;
+ if (length == 0)
+ io->entries = i + 1;
+ }
+ io->urbs[i]->transfer_buffer_length = len;
}
- io->urbs[i]->transfer_buffer_length = len;
+ io->urbs[--i]->transfer_flags &= ~URB_NO_INTERRUPT;
}
- io->urbs[--i]->transfer_flags &= ~URB_NO_INTERRUPT;
/* transaction state */
io->count = io->entries;
@@ -509,6 +553,10 @@ EXPORT_SYMBOL_GPL(usb_sg_init);
* could be transferred. That capability is less useful for low or full
* speed interrupt endpoints, which allow at most one packet per millisecond,
* of at most 8 or 64 bytes (respectively).
+ *
+ * It is not necessary to call this function to reserve bandwidth for devices
+ * under an xHCI host controller, as the bandwidth is reserved when the
+ * configuration or interface alt setting is selected.
*/
void usb_sg_wait(struct usb_sg_request *io)
{
@@ -759,7 +807,7 @@ static int usb_string_sub(struct usb_device *dev, unsigned int langid,
}
/**
- * usb_string - returns ISO 8859-1 version of a string descriptor
+ * usb_string - returns UTF-8 version of a string descriptor
* @dev: the device whose string descriptor is being retrieved
* @index: the number of the descriptor
* @buf: where to put the string
@@ -767,17 +815,10 @@ static int usb_string_sub(struct usb_device *dev, unsigned int langid,
* Context: !in_interrupt ()
*
* This converts the UTF-16LE encoded strings returned by devices, from
- * usb_get_string_descriptor(), to null-terminated ISO-8859-1 encoded ones
- * that are more usable in most kernel contexts. Note that all characters
- * in the chosen descriptor that can't be encoded using ISO-8859-1
- * are converted to the question mark ("?") character, and this function
+ * usb_get_string_descriptor(), to null-terminated UTF-8 encoded ones
+ * that are more usable in most kernel contexts. Note that this function
* chooses strings in the first language supported by the device.
*
- * The ASCII (or, redundantly, "US-ASCII") character set is the seven-bit
- * subset of ISO 8859-1. ISO-8859-1 is the eight-bit subset of Unicode,
- * and is appropriate for use many uses of English and several other
- * Western European languages. (But it doesn't include the "Euro" symbol.)
- *
* This call is synchronous, and may not be used in an interrupt context.
*
* Returns length of the string (>= 0) or usb_control_msg status (< 0).
@@ -786,7 +827,6 @@ int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
{
unsigned char *tbuf;
int err;
- unsigned int u, idx;
if (dev->state == USB_STATE_SUSPENDED)
return -EHOSTUNREACH;
@@ -821,16 +861,9 @@ int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
goto errout;
size--; /* leave room for trailing NULL char in output buffer */
- for (idx = 0, u = 2; u < err; u += 2) {
- if (idx >= size)
- break;
- if (tbuf[u+1]) /* high byte */
- buf[idx++] = '?'; /* non ISO-8859-1 character */
- else
- buf[idx++] = tbuf[u];
- }
- buf[idx] = 0;
- err = idx;
+ err = utf16s_to_utf8s((wchar_t *) &tbuf[2], (err - 2) / 2,
+ UTF16_LITTLE_ENDIAN, buf, size);
+ buf[err] = 0;
if (tbuf[1] != USB_DT_STRING)
dev_dbg(&dev->dev,
@@ -843,6 +876,9 @@ int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
}
EXPORT_SYMBOL_GPL(usb_string);
+/* one UTF-8-encoded 16-bit character has at most three bytes */
+#define MAX_USB_STRING_SIZE (127 * 3 + 1)
+
/**
* usb_cache_string - read a string descriptor and cache it for later use
* @udev: the device whose string descriptor is being read
@@ -860,9 +896,9 @@ char *usb_cache_string(struct usb_device *udev, int index)
if (index <= 0)
return NULL;
- buf = kmalloc(256, GFP_KERNEL);
+ buf = kmalloc(MAX_USB_STRING_SIZE, GFP_KERNEL);
if (buf) {
- len = usb_string(udev, index, buf, 256);
+ len = usb_string(udev, index, buf, MAX_USB_STRING_SIZE);
if (len > 0) {
smallbuf = kmalloc(++len, GFP_KERNEL);
if (!smallbuf)
@@ -1664,6 +1700,21 @@ free_interfaces:
if (ret)
goto free_interfaces;
+ /* Make sure we have bandwidth (and available HCD resources) for this
+ * configuration. Remove endpoints from the schedule if we're dropping
+ * this configuration to set configuration 0. After this point, the
+ * host controller will not allow submissions to dropped endpoints. If
+ * this call fails, the device state is unchanged.
+ */
+ if (cp)
+ ret = usb_hcd_check_bandwidth(dev, cp, NULL);
+ else
+ ret = usb_hcd_check_bandwidth(dev, NULL, NULL);
+ if (ret < 0) {
+ usb_autosuspend_device(dev);
+ goto free_interfaces;
+ }
+
/* if it's already configured, clear out old state first.
* getting rid of old interfaces means unbinding their drivers.
*/
@@ -1686,6 +1737,7 @@ free_interfaces:
dev->actconfig = cp;
if (!cp) {
usb_set_device_state(dev, USB_STATE_ADDRESS);
+ usb_hcd_check_bandwidth(dev, NULL, NULL);
usb_autosuspend_device(dev);
goto free_interfaces;
}
diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index c66789197927..b5c72e458943 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -552,8 +552,8 @@ static struct attribute *dev_string_attrs[] = {
static mode_t dev_string_attrs_are_visible(struct kobject *kobj,
struct attribute *a, int n)
{
- struct usb_device *udev = to_usb_device(
- container_of(kobj, struct device, kobj));
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct usb_device *udev = to_usb_device(dev);
if (a == &dev_attr_manufacturer.attr) {
if (udev->manufacturer == NULL)
@@ -585,8 +585,8 @@ static ssize_t
read_descriptors(struct kobject *kobj, struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
- struct usb_device *udev = to_usb_device(
- container_of(kobj, struct device, kobj));
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct usb_device *udev = to_usb_device(dev);
size_t nleft = count;
size_t srclen, n;
int cfgno;
@@ -786,8 +786,8 @@ static struct attribute *intf_assoc_attrs[] = {
static mode_t intf_assoc_attrs_are_visible(struct kobject *kobj,
struct attribute *a, int n)
{
- struct usb_interface *intf = to_usb_interface(
- container_of(kobj, struct device, kobj));
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct usb_interface *intf = to_usb_interface(dev);
if (intf->intf_assoc == NULL)
return 0;
diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c
index 3376055f36e7..0885d4abdc62 100644
--- a/drivers/usb/core/urb.c
+++ b/drivers/usb/core/urb.c
@@ -241,6 +241,12 @@ EXPORT_SYMBOL_GPL(usb_unanchor_urb);
* If the USB subsystem can't allocate sufficient bandwidth to perform
* the periodic request, submitting such a periodic request should fail.
*
+ * For devices under xHCI, the bandwidth is reserved at configuration time, or
+ * when the alt setting is selected. If there is not enough bus bandwidth, the
+ * configuration/alt setting request will fail. Therefore, submissions to
+ * periodic endpoints on devices under xHCI should never fail due to bandwidth
+ * constraints.
+ *
* Device drivers must explicitly request that repetition, by ensuring that
* some URB is always on the endpoint's queue (except possibly for short
* periods during completion callacks). When there is no longer an urb
@@ -351,6 +357,7 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
if (xfertype == USB_ENDPOINT_XFER_ISOC) {
int n, len;
+ /* FIXME SuperSpeed isoc endpoints have up to 16 bursts */
/* "high bandwidth" mode, 1-3 packets/uframe? */
if (dev->speed == USB_SPEED_HIGH) {
int mult = 1 + ((max >> 11) & 0x03);
@@ -426,6 +433,11 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
return -EINVAL;
/* too big? */
switch (dev->speed) {
+ case USB_SPEED_SUPER: /* units are 125us */
+ /* Handle up to 2^(16-1) microframes */
+ if (urb->interval > (1 << 15))
+ return -EINVAL;
+ max = 1 << 15;
case USB_SPEED_HIGH: /* units are microframes */
/* NOTE usb handles 2^15 */
if (urb->interval > (1024 * 8))
diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 927a27dd2f85..a26f73880c32 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -34,6 +34,7 @@
#include <linux/usb.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>
+#include <linux/debugfs.h>
#include <asm/io.h>
#include <linux/scatterlist.h>
@@ -139,8 +140,7 @@ static int __find_interface(struct device *dev, void *data)
struct find_interface_arg *arg = data;
struct usb_interface *intf;
- /* can't look at usb devices, only interfaces */
- if (is_usb_device(dev))
+ if (!is_usb_interface(dev))
return 0;
intf = to_usb_interface(dev);
@@ -184,11 +184,16 @@ EXPORT_SYMBOL_GPL(usb_find_interface);
static void usb_release_dev(struct device *dev)
{
struct usb_device *udev;
+ struct usb_hcd *hcd;
udev = to_usb_device(dev);
+ hcd = bus_to_hcd(udev->bus);
usb_destroy_configuration(udev);
- usb_put_hcd(bus_to_hcd(udev->bus));
+ /* Root hubs aren't real devices, so don't free HCD resources */
+ if (hcd->driver->free_dev && udev->parent)
+ hcd->driver->free_dev(hcd, udev);
+ usb_put_hcd(hcd);
kfree(udev->product);
kfree(udev->manufacturer);
kfree(udev->serial);
@@ -359,6 +364,13 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
kfree(dev);
return NULL;
}
+ /* Root hubs aren't true devices, so don't allocate HCD resources */
+ if (usb_hcd->driver->alloc_dev && parent &&
+ !usb_hcd->driver->alloc_dev(usb_hcd, dev)) {
+ usb_put_hcd(bus_to_hcd(bus));
+ kfree(dev);
+ return NULL;
+ }
device_initialize(&dev->dev);
dev->dev.bus = &usb_bus_type;
@@ -386,18 +398,24 @@ struct usb_device *usb_alloc_dev(struct usb_device *parent,
*/
if (unlikely(!parent)) {
dev->devpath[0] = '0';
+ dev->route = 0;
dev->dev.parent = bus->controller;
dev_set_name(&dev->dev, "usb%d", bus->busnum);
root_hub = 1;
} else {
/* match any labeling on the hubs; it's one-based */
- if (parent->devpath[0] == '0')
+ if (parent->devpath[0] == '0') {
snprintf(dev->devpath, sizeof dev->devpath,
"%d", port1);
- else
+ /* Root ports are not counted in route string */
+ dev->route = 0;
+ } else {
snprintf(dev->devpath, sizeof dev->devpath,
"%s.%d", parent->devpath, port1);
+ dev->route = parent->route +
+ (port1 << ((parent->level - 1)*4));
+ }
dev->dev.parent = &parent->dev;
dev_set_name(&dev->dev, "%d-%s", bus->busnum, dev->devpath);
@@ -810,12 +828,12 @@ void usb_buffer_dmasync(struct urb *urb)
return;
if (controller->dma_mask) {
- dma_sync_single(controller,
+ dma_sync_single_for_cpu(controller,
urb->transfer_dma, urb->transfer_buffer_length,
usb_pipein(urb->pipe)
? DMA_FROM_DEVICE : DMA_TO_DEVICE);
if (usb_pipecontrol(urb->pipe))
- dma_sync_single(controller,
+ dma_sync_single_for_cpu(controller,
urb->setup_dma,
sizeof(struct usb_ctrlrequest),
DMA_TO_DEVICE);
@@ -933,8 +951,8 @@ void usb_buffer_dmasync_sg(const struct usb_device *dev, int is_in,
|| !controller->dma_mask)
return;
- dma_sync_sg(controller, sg, n_hw_ents,
- is_in ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
+ dma_sync_sg_for_cpu(controller, sg, n_hw_ents,
+ is_in ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
}
EXPORT_SYMBOL_GPL(usb_buffer_dmasync_sg);
#endif
@@ -1012,6 +1030,35 @@ static struct notifier_block usb_bus_nb = {
.notifier_call = usb_bus_notify,
};
+struct dentry *usb_debug_root;
+EXPORT_SYMBOL_GPL(usb_debug_root);
+
+struct dentry *usb_debug_devices;
+
+static int usb_debugfs_init(void)
+{
+ usb_debug_root = debugfs_create_dir("usb", NULL);
+ if (!usb_debug_root)
+ return -ENOENT;
+
+ usb_debug_devices = debugfs_create_file("devices", 0444,
+ usb_debug_root, NULL,
+ &usbfs_devices_fops);
+ if (!usb_debug_devices) {
+ debugfs_remove(usb_debug_root);
+ usb_debug_root = NULL;
+ return -ENOENT;
+ }
+
+ return 0;
+}
+
+static void usb_debugfs_cleanup(void)
+{
+ debugfs_remove(usb_debug_devices);
+ debugfs_remove(usb_debug_root);
+}
+
/*
* Init
*/
@@ -1023,6 +1070,10 @@ static int __init usb_init(void)
return 0;
}
+ retval = usb_debugfs_init();
+ if (retval)
+ goto out;
+
retval = ksuspend_usb_init();
if (retval)
goto out;
@@ -1032,9 +1083,6 @@ static int __init usb_init(void)
retval = bus_register_notifier(&usb_bus_type, &usb_bus_nb);
if (retval)
goto bus_notifier_failed;
- retval = usb_host_init();
- if (retval)
- goto host_init_failed;
retval = usb_major_init();
if (retval)
goto major_init_failed;
@@ -1064,8 +1112,6 @@ usb_devio_init_failed:
driver_register_failed:
usb_major_cleanup();
major_init_failed:
- usb_host_cleanup();
-host_init_failed:
bus_unregister_notifier(&usb_bus_type, &usb_bus_nb);
bus_notifier_failed:
bus_unregister(&usb_bus_type);
@@ -1090,10 +1136,10 @@ static void __exit usb_exit(void)
usb_deregister(&usbfs_driver);
usb_devio_cleanup();
usb_hub_cleanup();
- usb_host_cleanup();
bus_unregister_notifier(&usb_bus_type, &usb_bus_nb);
bus_unregister(&usb_bus_type);
ksuspend_usb_cleanup();
+ usb_debugfs_cleanup();
}
subsys_initcall(usb_init);
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index 79d8a9ea559b..e2a8cfaade1d 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -41,8 +41,6 @@ extern int usb_hub_init(void);
extern void usb_hub_cleanup(void);
extern int usb_major_init(void);
extern void usb_major_cleanup(void);
-extern int usb_host_init(void);
-extern void usb_host_cleanup(void);
#ifdef CONFIG_PM
@@ -106,6 +104,7 @@ extern struct workqueue_struct *ksuspend_usb_wq;
extern struct bus_type usb_bus_type;
extern struct device_type usb_device_type;
extern struct device_type usb_if_device_type;
+extern struct device_type usb_ep_device_type;
extern struct usb_device_driver usb_generic_driver;
static inline int is_usb_device(const struct device *dev)
@@ -113,6 +112,16 @@ static inline int is_usb_device(const struct device *dev)
return dev->type == &usb_device_type;
}
+static inline int is_usb_interface(const struct device *dev)
+{
+ return dev->type == &usb_if_device_type;
+}
+
+static inline int is_usb_endpoint(const struct device *dev)
+{
+ return dev->type == &usb_ep_device_type;
+}
+
/* Do the same for device drivers and interface drivers. */
static inline int is_usb_device_driver(struct device_driver *drv)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.