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authorSarah Sharp <sarah.a.sharp@linux.intel.com>2010-04-02 15:33:56 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2010-05-20 13:21:37 -0700
commit22ad1e7f86e1fb96488d71512e2797153a6ad839 (patch)
tree5e2b35287d9a03664e9b4aac64c3e7f5a3173469
parente07896e62abbf7a741a5cd5b25ba7637bdf91ad0 (diff)
USB: Add parsing of SuperSpeed endpoint companion descriptor.
Allow the xHCI drivers (and any new USB 3.0 drivers) to parse the SuperSpeed endpoint companion descriptor to find the maximum number of bulk endpoint streams the endpoint supports. This is used to calculate the maximum total number of streams the driver can allocate. Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--include/linux/usb/ch9.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/usb/ch9.h b/include/linux/usb/ch9.h
index e58369ff8168..603b61aadd65 100644
--- a/include/linux/usb/ch9.h
+++ b/include/linux/usb/ch9.h
@@ -556,6 +556,8 @@ struct usb_ss_ep_comp_descriptor {
} __attribute__ ((packed));
#define USB_DT_SS_EP_COMP_SIZE 6
+/* Bits 4:0 of bmAttributes if this is a bulk endpoint */
+#define USB_SS_MAX_STREAMS(p) (1 << (p & 0x1f))
/*-------------------------------------------------------------------------*/