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| author | Sarah Sharp <sarah.a.sharp@linux.intel.com> | 2009-09-04 10:53:20 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-09-23 06:46:40 -0700 |
| commit | ac1c1b7f16ed287fcec5bcfae06d0165c3941ec3 (patch) | |
| tree | 977be3ee0c12da25d453b35a419151eafcd19406 /drivers/usb/host/xhci.h | |
| parent | 07b6de102843b717ecd962cf35ec4ad9b1fbed9d (diff) | |
| download | talos-op-linux-ac1c1b7f16ed287fcec5bcfae06d0165c3941ec3.tar.gz talos-op-linux-ac1c1b7f16ed287fcec5bcfae06d0165c3941ec3.zip | |
USB: xhci: Support USB hubs.
For a USB hub to work under an xHCI host controller, the xHC's internal
scheduler must be made aware of the hub's characteristics. Add an xHCI
hook that the USB core will call after it fetches the hub descriptor.
This hook will add hub information to the slot context for that device,
including whether it has multiple TTs or a single TT, the number of ports
on the hub, and TT think time.
Setting up the slot context for the device is different for 0.95 and 0.96
xHCI host controllers.
Some of the slot context reserved fields in the 0.95 specification were
changed into hub fields in the 0.96 specification. Don't set the TT think
time or number of ports for a hub if we're dealing with a 0.95-compliant
xHCI host controller.
The 0.95 xHCI specification says that to modify the hub flag, we need to
issue an evaluate context command. The 0.96 specification says that flag
can be set with a configure endpoint command. Issue the correct command
based on the version reported by the hardware.
This patch does not add support for multi-TT hubs. Multi-TT hubs expose
a single TT on alt setting 0, and multi-TT on alt setting 1. The xHCI
driver can't handle setting alternate interfaces yet.
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/host/xhci.h')
| -rw-r--r-- | drivers/usb/host/xhci.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index 36f7d4f91d9f..4b254b6fa245 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -509,6 +509,8 @@ struct xhci_slot_ctx { #define MAX_EXIT (0xffff) /* Root hub port number that is needed to access the USB device */ #define ROOT_HUB_PORT(p) (((p) & 0xff) << 16) +/* Maximum number of ports under a hub device */ +#define XHCI_MAX_PORTS(p) (((p) & 0xff) << 24) /* tt_info bitmasks */ /* @@ -522,6 +524,7 @@ struct xhci_slot_ctx { * '0' if the device is not low or full speed. */ #define TT_PORT (0xff << 8) +#define TT_THINK_TIME(p) (((p) & 0x3) << 16) /* dev_state bitmasks */ /* USB device address - assigned by the HC */ @@ -1231,6 +1234,8 @@ irqreturn_t xhci_irq(struct usb_hcd *hcd); int xhci_alloc_dev(struct usb_hcd *hcd, struct usb_device *udev); void xhci_free_dev(struct usb_hcd *hcd, struct usb_device *udev); int xhci_address_device(struct usb_hcd *hcd, struct usb_device *udev); +int xhci_update_hub_device(struct usb_hcd *hcd, struct usb_device *hdev, + struct usb_tt *tt, gfp_t mem_flags); int xhci_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, gfp_t mem_flags); int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status); int xhci_add_endpoint(struct usb_hcd *hcd, struct usb_device *udev, struct usb_host_endpoint *ep); |
