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firewire: add CSR NODE_IDS support

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The NODE_IDS register, and especially its bus_id field, is quite
useless because 1394.1 requires that the bus_id field always stays
0x3ff.  However, the 1394 specification requires this register on all
transaction capable nodes, and the Base 1394 Test Suite tests for it,
so we better implement it.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch
2010-06-10 08:25:19 +02:00
parent 60d32970c5
commit 506f1a3193
3 changed files with 32 additions and 0 deletions
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11
drivers/firewire/core-transaction.c
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@@ -1023,6 +1023,17 @@ static void handle_registers(struct fw_card *card, struct fw_request *request,
}
break;
case CSR_NODE_IDS:
if (tcode == TCODE_READ_QUADLET_REQUEST)
*data = cpu_to_be32(card->driver->
read_csr_reg(card, CSR_NODE_IDS));
else if (tcode == TCODE_WRITE_QUADLET_REQUEST)
card->driver->write_csr_reg(card, CSR_NODE_IDS,
be32_to_cpu(*data));
else
rcode = RCODE_TYPE_ERROR;
break;
case CSR_CYCLE_TIME:
if (TCODE_IS_READ_REQUEST(tcode) && length == 4)
*data = cpu_to_be32(card->driver->