firewire: implement broadcast_channel CSR for 1394a compliance
See IEEE 1394a clause 8.3.2.3.11.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/firewire/fw-transaction.c b/drivers/firewire/fw-transaction.c
index 03ae8a7..2f11ed1 100644
--- a/drivers/firewire/fw-transaction.c
+++ b/drivers/firewire/fw-transaction.c
@@ -817,12 +817,13 @@
int reg = offset & ~CSR_REGISTER_BASE;
unsigned long long bus_time;
__be32 *data = payload;
+ int rcode = RCODE_COMPLETE;
switch (reg) {
case CSR_CYCLE_TIME:
case CSR_BUS_TIME:
if (!TCODE_IS_READ_REQUEST(tcode) || length != 4) {
- fw_send_response(card, request, RCODE_TYPE_ERROR);
+ rcode = RCODE_TYPE_ERROR;
break;
}
@@ -831,7 +832,17 @@
*data = cpu_to_be32(bus_time);
else
*data = cpu_to_be32(bus_time >> 25);
- fw_send_response(card, request, RCODE_COMPLETE);
+ break;
+
+ case CSR_BROADCAST_CHANNEL:
+ if (tcode == TCODE_READ_QUADLET_REQUEST)
+ *data = cpu_to_be32(card->broadcast_channel);
+ else if (tcode == TCODE_WRITE_QUADLET_REQUEST)
+ card->broadcast_channel =
+ (be32_to_cpu(*data) & BROADCAST_CHANNEL_VALID) |
+ BROADCAST_CHANNEL_INITIAL;
+ else
+ rcode = RCODE_TYPE_ERROR;
break;
case CSR_BUS_MANAGER_ID:
@@ -850,10 +861,13 @@
case CSR_BUSY_TIMEOUT:
/* FIXME: Implement this. */
+
default:
- fw_send_response(card, request, RCODE_ADDRESS_ERROR);
+ rcode = RCODE_ADDRESS_ERROR;
break;
}
+
+ fw_send_response(card, request, rcode);
}
static struct fw_address_handler registers = {