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| author | Clemens Ladisch <clemens@ladisch.de> | 2010-06-10 08:35:06 +0200 |
|---|---|---|
| committer | Clemens Ladisch <clemens@ladisch.de> | 2010-06-10 08:35:06 +0200 |
| commit | a1a1132bd83d0aea51d4f19be4b4a58a064a0131 (patch) | |
| tree | 93352d6aa9fd8eaa0521fbeb65853cd9f485666e /drivers/firewire/core-transaction.c | |
| parent | 27a2329f8235d6ce637463f5d83e98d760ef006e (diff) | |
| download | linux-a1a1132bd83d0aea51d4f19be4b4a58a064a0131.tar.gz linux-a1a1132bd83d0aea51d4f19be4b4a58a064a0131.tar.bz2 linux-a1a1132bd83d0aea51d4f19be4b4a58a064a0131.zip | |
firewire: add CSR PRIORITY_BUDGET support
If supported by the OHCI controller, implement the PRIORITY_BUDGET
register, which is required for nodes that can use asynchronous
priority arbitration.
To allow the core to determine what features the lowlevel device
supports, add a new card driver callback.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Diffstat (limited to 'drivers/firewire/core-transaction.c')
| -rw-r--r-- | drivers/firewire/core-transaction.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c index 8146133818dc..a61eb3fb9573 100644 --- a/drivers/firewire/core-transaction.c +++ b/drivers/firewire/core-transaction.c @@ -1126,6 +1126,20 @@ static void handle_registers(struct fw_card *card, struct fw_request *request, rcode = RCODE_TYPE_ERROR; break; + case CSR_PRIORITY_BUDGET: + if (!(card->driver->get_features(card) & + FEATURE_PRIORITY_BUDGET)) + rcode = RCODE_ADDRESS_ERROR; + else if (tcode == TCODE_READ_QUADLET_REQUEST) + *data = cpu_to_be32(card->driver-> + read_csr_reg(card, CSR_PRIORITY_BUDGET)); + else if (tcode == TCODE_WRITE_QUADLET_REQUEST) + card->driver->write_csr_reg(card, CSR_PRIORITY_BUDGET, + 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); |