diff options
Diffstat (limited to 'drivers/usb/core/hcd.c')
| -rw-r--r-- | drivers/usb/core/hcd.c | 220 |
1 files changed, 185 insertions, 35 deletions
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, |