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authorStefan Richter <stefanr@s5r6.in-berlin.de>2005-12-01 18:51:52 -0500
committerJody McIntyre <scjody@modernduck.com>2005-12-01 18:51:52 -0500
commit14c0fa243b358c24040ff5f44b60c47aaf6430c3 (patch)
treee338f694399b1c9b2f3e6ba82fad648a677012cf /drivers/ieee1394/nodemgr.c
parent01fc99864ecc678c4f1f476b2a8b64ebcb14e733 (diff)
ieee1394: resume remote ports when starting a host (fixes device recognition)
After initializing an IEEE 1394 host, broadcast a resume packet. This makes remote nodes visible which suspended their ports while the host was down. Such nodes had to be unplugged and replugged in order to be recognized. Motorola DCT6200 cable reciever was affected, probably other devices too. http://marc.theaimsgroup.com/?t=113202715800001 Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Jody McIntyre <scjody@modernduck.com>
Diffstat (limited to 'drivers/ieee1394/nodemgr.c')
-rw-r--r--drivers/ieee1394/nodemgr.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c
index 3f0917bbd7f5..b56934edd62b 100644
--- a/drivers/ieee1394/nodemgr.c
+++ b/drivers/ieee1394/nodemgr.c
@@ -1410,6 +1410,24 @@ static void nodemgr_node_probe(struct host_info *hi, int generation)
1410 return; 1410 return;
1411} 1411}
1412 1412
1413static int nodemgr_send_resume_packet(struct hpsb_host *host)
1414{
1415 struct hpsb_packet *packet;
1416 int ret = 1;
1417
1418 packet = hpsb_make_phypacket(host,
1419 0x003c0000 | NODEID_TO_NODE(host->node_id) << 24);
1420 if (packet) {
1421 packet->no_waiter = 1;
1422 packet->generation = get_hpsb_generation(host);
1423 ret = hpsb_send_packet(packet);
1424 }
1425 if (ret)
1426 HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
1427 host->id);
1428 return ret;
1429}
1430
1413/* Because we are a 1394a-2000 compliant IRM, we need to inform all the other 1431/* Because we are a 1394a-2000 compliant IRM, we need to inform all the other
1414 * nodes of the broadcast channel. (Really we're only setting the validity 1432 * nodes of the broadcast channel. (Really we're only setting the validity
1415 * bit). Other IRM responsibilities go in here as well. */ 1433 * bit). Other IRM responsibilities go in here as well. */
@@ -1460,6 +1478,13 @@ static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
1460 } 1478 }
1461 } 1479 }
1462 1480
1481 /* Some devices suspend their ports while being connected to an inactive
1482 * host adapter, i.e. if connected before the low-level driver is
1483 * loaded. They become visible either when physically unplugged and
1484 * replugged, or when receiving a resume packet. Send one once. */
1485 if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
1486 host->resume_packet_sent = 1;
1487
1463 return 1; 1488 return 1;
1464} 1489}
1465 1490