firewire: add CSR PRIORITY_BUDGET support

If supported by the OHCI controller, implement the PRIORITY_BUDGET
register, which is required for nodes that can use asynchronous
priority arbitration.

To allow the core to determine what features the lowlevel device
supports, add a new card driver callback.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/firewire.h b/include/linux/firewire.h
index cdf8213c68ca..a50377d91254 100644
--- a/include/linux/firewire.h
+++ b/include/linux/firewire.h
@@ -32,6 +32,7 @@
 #define CSR_CYCLE_TIME                  0x200
 #define CSR_BUS_TIME                    0x204
 #define CSR_BUSY_TIMEOUT                0x210
+#define CSR_PRIORITY_BUDGET             0x218
 #define CSR_BUS_MANAGER_ID              0x21c
 #define CSR_BANDWIDTH_AVAILABLE         0x220
 #define CSR_CHANNELS_AVAILABLE          0x224