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authorClemens Ladisch <clemens@ladisch.de>2010-06-10 06:35:37 (GMT)
committerClemens Ladisch <clemens@ladisch.de>2010-06-10 06:35:37 (GMT)
commit3d1f46eb60b155c705e389ecdf313f11b4b91976 (patch)
tree6a28e68a7372d49f172f73a2c30e1a72dd124ffa /drivers/firewire
parenta1a1132bd83d0aea51d4f19be4b4a58a064a0131 (diff)
downloadlinux-3d1f46eb60b155c705e389ecdf313f11b4b91976.tar.xz
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>
Diffstat (limited to 'drivers/firewire')
-rw-r--r--drivers/firewire/core-transaction.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c
index a61eb3f..dd8ef65 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);