aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-pxa/dma.c
diff options
context:
space:
mode:
authorNicolas Pitre <nico@cam.org>2006-05-05 17:32:24 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-05-05 17:32:24 -0400
commit99532559dc7a8e686b2cef14c780a7ad5dbd4a31 (patch)
tree3dff94d714f3e32739cd898b7eebf7910e1ef227 /arch/arm/mach-pxa/dma.c
parentb7d7ef87e15dea105be59ec8f14e2f92182dd421 (diff)
[ARM] 3500/1: fix PXA27x DMA allocation priority
Patch from Nicolas Pitre Intel PXA27x developers manual section 5.4.1.1 lists a priority distribution for the DMA channels differently than what the code currently assumes. This patch fixes that. Noticed by Simon Vogl <vogl@soft.uni-linz.ac.at> Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-pxa/dma.c')
-rw-r--r--arch/arm/mach-pxa/dma.c17
1 files changed, 5 insertions, 12 deletions
diff --git a/arch/arm/mach-pxa/dma.c b/arch/arm/mach-pxa/dma.c
index 458112b21e25..7d8c85486c66 100644
--- a/arch/arm/mach-pxa/dma.c
+++ b/arch/arm/mach-pxa/dma.c
@@ -45,23 +45,16 @@ int pxa_request_dma (char *name, pxa_dma_prio prio,
45 45
46 local_irq_save(flags); 46 local_irq_save(flags);
47 47
48 /* try grabbing a DMA channel with the requested priority */ 48 do {
49 for (i = prio; i < prio + PXA_DMA_NBCH(prio); i++) { 49 /* try grabbing a DMA channel with the requested priority */
50 if (!dma_channels[i].name) { 50 pxa_for_each_dma_prio (i, prio) {
51 found = 1;
52 break;
53 }
54 }
55
56 if (!found) {
57 /* requested prio group is full, try hier priorities */
58 for (i = prio-1; i >= 0; i--) {
59 if (!dma_channels[i].name) { 51 if (!dma_channels[i].name) {
60 found = 1; 52 found = 1;
61 break; 53 break;
62 } 54 }
63 } 55 }
64 } 56 /* if requested prio group is full, try a hier priority */
57 } while (!found && prio--);
65 58
66 if (found) { 59 if (found) {
67 DCSR(i) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR; 60 DCSR(i) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR;