diff options
Diffstat (limited to 'src/drivers/usb/ehci.h')
| -rw-r--r-- | src/drivers/usb/ehci.h | 20 |
1 files changed, 2 insertions, 18 deletions
diff --git a/src/drivers/usb/ehci.h b/src/drivers/usb/ehci.h index d575727d..7ad1e649 100644 --- a/src/drivers/usb/ehci.h +++ b/src/drivers/usb/ehci.h @@ -241,21 +241,8 @@ struct ehci_transfer_descriptor { uint32_t low[5]; /** Extended buffer pointers (high 32 bits) */ uint32_t high[5]; - - /** Immediate data buffer - * - * This is not part of the hardware data structure. Transfer - * descriptors must be aligned to a 32-byte boundary. Create - * an array of descriptors therefore requires 12 bytes of - * padding at the end of each descriptor. - * - * We can use this padding as an immediate data buffer (for - * setup packets). This avoids the need for separate - * allocations. As a bonus, there is no need to check this - * buffer for reachability, since it is contained within a - * transfer descriptor which must already be reachable. - */ - uint8_t immediate[12]; + /** Reserved */ + uint8_t reserved[12]; } __attribute__ (( packed )); /** Transaction error */ @@ -483,9 +470,6 @@ struct ehci_transfer { unsigned int flags; }; -/** Copy data to immediate data buffer */ -#define EHCI_FL_IMMEDIATE 0x0100 - /** Set initial data toggle */ #define EHCI_FL_TOGGLE 0x8000 |