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authornonaka <nonaka@NetBSD.org>2014-11-09 19:57:53 +0000
committernonaka <nonaka@NetBSD.org>2014-11-09 19:57:53 +0000
commit2eadb60bf035fb5a164981437f1fcd9c342bbbdf (patch)
tree9b9c1bccc8fc06a0ce7d99a61c951b8e5822c1fc /sys/dev/pci
parent3bc86ab0c834d26c793ca332c5b7f080b0c5c213 (diff)
Wait for the RIRB DMA engine to come ready. Needed on the audio device
integrated in the Vortex86EX SoC. From OpenBSD.
Diffstat (limited to 'sys/dev/pci')
-rw-r--r--sys/dev/pci/azalia.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/sys/dev/pci/azalia.c b/sys/dev/pci/azalia.c
index a212d551cb4..ba4d292de55 100644
--- a/sys/dev/pci/azalia.c
+++ b/sys/dev/pci/azalia.c
@@ -1,4 +1,4 @@
-/* $NetBSD: azalia.c,v 1.82 2014/09/21 14:30:22 christos Exp $ */
+/* $NetBSD: azalia.c,v 1.83 2014/11/09 19:57:53 nonaka Exp $ */
/*-
* Copyright (c) 2005, 2008 The NetBSD Foundation, Inc.
@@ -41,7 +41,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: azalia.c,v 1.82 2014/09/21 14:30:22 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: azalia.c,v 1.83 2014/11/09 19:57:53 nonaka Exp $");
#include <sys/param.h>
#include <sys/device.h>
@@ -816,6 +816,17 @@ azalia_init_rirb(azalia_t *az, int reinit)
/* Run! */
rirbctl = AZ_READ_1(az, RIRBCTL);
AZ_WRITE_1(az, RIRBCTL, rirbctl | HDA_RIRBCTL_RIRBDMAEN | HDA_RIRBCTL_RINTCTL);
+ for (i = 5000; i >= 0; i--) {
+ DELAY(10);
+ rirbctl = AZ_READ_1(az, RIRBCTL);
+ if (rirbctl & HDA_RIRBCTL_RIRBDMAEN)
+ break;
+ }
+ if (i <= 0) {
+ aprint_error_dev(az->dev, "RIRB is not running\n");
+ return EBUSY;
+ }
+
return 0;
}