diff options
Diffstat (limited to 'drivers/usb/host/xhci.h')
| -rw-r--r-- | drivers/usb/host/xhci.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h index f9f88626a57a..dc6f62a4b197 100644 --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -2580,6 +2580,35 @@ static inline const char *xhci_decode_portsc(u32 portsc) return str; } +static inline const char *xhci_decode_doorbell(u32 slot, u32 doorbell) +{ + static char str[256]; + u8 ep; + u16 stream; + int ret; + + ep = (doorbell & 0xff); + stream = doorbell >> 16; + + if (slot == 0) { + sprintf(str, "Command Ring %d", doorbell); + return str; + } + ret = sprintf(str, "Slot %d ", slot); + if (ep > 0 && ep < 32) + ret = sprintf(str + ret, "ep%d%s", + ep / 2, + ep % 2 ? "in" : "out"); + else if (ep == 0 || ep < 248) + ret = sprintf(str + ret, "Reserved %d", ep); + else + ret = sprintf(str + ret, "Vendor Defined %d", ep); + if (stream) + ret = sprintf(str + ret, " Stream %d", stream); + + return str; +} + static inline const char *xhci_ep_state_string(u8 state) { switch (state) { |