diff options
| author | Clemens Ladisch <clemens@ladisch.de> | 2010-06-10 08:35:37 +0200 |
|---|---|---|
| committer | Clemens Ladisch <clemens@ladisch.de> | 2010-06-10 08:35:37 +0200 |
| commit | 3d1f46eb60b155c705e389ecdf313f11b4b91976 (patch) | |
| tree | 6a28e68a7372d49f172f73a2c30e1a72dd124ffa | |
| parent | a1a1132bd83d0aea51d4f19be4b4a58a064a0131 (diff) | |
| download | linux-3d1f46eb60b155c705e389ecdf313f11b4b91976.tar.gz linux-3d1f46eb60b155c705e389ecdf313f11b4b91976.tar.bz2 linux-3d1f46eb60b155c705e389ecdf313f11b4b91976.zip | |
firewire: core: add CSR MAINT_UTILITY support
Implement the MAIN_UTILITY register, which is utterly optional
but useful as a safe target for diagnostic read/write/broadcast
transactions.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
| -rw-r--r-- | drivers/firewire/core-transaction.c | 9 | ||||
| -rw-r--r-- | include/linux/firewire.h | 3 |
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c index a61eb3fb9573..dd8ef650a7cb 100644 --- a/drivers/firewire/core-transaction.c +++ b/drivers/firewire/core-transaction.c @@ -1140,6 +1140,15 @@ static void handle_registers(struct fw_card *card, struct fw_request *request, rcode = RCODE_TYPE_ERROR; break; + case CSR_MAINT_UTILITY: + if (tcode == TCODE_READ_QUADLET_REQUEST) + *data = card->maint_utility_register; + else if (tcode == TCODE_WRITE_QUADLET_REQUEST) + card->maint_utility_register = *data; + else + rcode = RCODE_TYPE_ERROR; + break; + case CSR_BROADCAST_CHANNEL: if (tcode == TCODE_READ_QUADLET_REQUEST) *data = cpu_to_be32(card->broadcast_channel); diff --git a/include/linux/firewire.h b/include/linux/firewire.h index a50377d91254..f1160e831dad 100644 --- a/include/linux/firewire.h +++ b/include/linux/firewire.h @@ -38,6 +38,7 @@ #define CSR_CHANNELS_AVAILABLE 0x224 #define CSR_CHANNELS_AVAILABLE_HI 0x224 #define CSR_CHANNELS_AVAILABLE_LO 0x228 +#define CSR_MAINT_UTILITY 0x230 #define CSR_BROADCAST_CHANNEL 0x234 #define CSR_CONFIG_ROM 0x400 #define CSR_CONFIG_ROM_END 0x800 @@ -122,6 +123,8 @@ struct fw_card { bool broadcast_channel_allocated; u32 broadcast_channel; __be32 topology_map[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4]; + + __be32 maint_utility_register; }; struct fw_attribute_group { |