firewire: add CSR cmstr support

Implement the cmstr bit, which is required for cycle master capable
nodes and tested for by the Base 1394 Test Suite.

This bit allows the bus master to disable cycle start packets; there are
bus master implementations that actually do this.

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

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/firewire/core.h b/drivers/firewire/core.h
index 3b8c0f042f49..aaecdd1c1767 100644
--- a/drivers/firewire/core.h
+++ b/drivers/firewire/core.h
@@ -40,6 +40,8 @@ struct fw_packet;
 
 #define FEATURE_PRIORITY_BUDGET         0x01
 
+#define CSR_STATE_BIT_CMSTR     (1 << 8)
+
 struct fw_card_driver {
         /*
          * Enable the given card with the given initial config rom.