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path: root/drivers/usb/core/hcd.c
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Diffstat (limited to 'drivers/usb/core/hcd.c')
-rw-r--r--drivers/usb/core/hcd.c220
1 files changed, 185 insertions, 35 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 42b93da1085..ce3f453f02e 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,