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firewire: add CSR BUS_TIME support

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Implement the BUS_TIME register, which is required for cycle master
capable nodes and tested for by the Base 1393 Test Suite.  Even when
there is not yet bus master initialization support, this register allows
us to work together with other bus masters.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch
2010-06-10 08:33:07 +02:00
parent 9ab5071cd4
commit a48777e03a
2 changed files with 120 additions and 62 deletions
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14
drivers/firewire/core-transaction.c
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@@ -1104,6 +1104,17 @@ static void handle_registers(struct fw_card *card, struct fw_request *request,
rcode = RCODE_TYPE_ERROR;
break;
case CSR_BUS_TIME:
if (tcode == TCODE_READ_QUADLET_REQUEST)
*data = cpu_to_be32(card->driver->
read_csr_reg(card, CSR_BUS_TIME));
else if (tcode == TCODE_WRITE_QUADLET_REQUEST)
card->driver->write_csr_reg(card, CSR_BUS_TIME,
be32_to_cpu(*data));
else
rcode = RCODE_TYPE_ERROR;
break;
case CSR_BROADCAST_CHANNEL:
if (tcode == TCODE_READ_QUADLET_REQUEST)
*data = cpu_to_be32(card->broadcast_channel);
@@ -1132,9 +1143,6 @@ static void handle_registers(struct fw_card *card, struct fw_request *request,
case CSR_BUSY_TIMEOUT:
/* FIXME: Implement this. */
case CSR_BUS_TIME:
/* Useless without initialization by the bus manager. */
default:
rcode = RCODE_ADDRESS_ERROR;
break;