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firewire: implement broadcast_channel CSR for 1394a compliance

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See IEEE 1394a clause 8.3.2.3.11.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Stefan Richter
2008-05-24 16:41:09 +02:00
parent 435f972697
commit e534fe16b9
3 changed files with 22 additions and 3 deletions
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20
drivers/firewire/fw-transaction.c
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@@ -817,12 +817,13 @@ handle_registers(struct fw_card *card, struct fw_request *request,
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 @@ handle_registers(struct fw_card *card, struct fw_request *request,
*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 @@ handle_registers(struct fw_card *card, struct fw_request *request,
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 = {