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authorMichael Hennerich <michael.hennerich@analog.com>2008-05-17 15:57:01 +0800
committerBryan Wu <cooloney@kernel.org>2008-05-17 15:57:01 +0800
commit5ce998cf6d1dbb28f14dea879a366ed5348f9681 (patch)
tree03f5b3bd3af3d5a48df42b3c5f50d02b98dcbd78 /arch
parent9cd9c616f5890c9345546e03c99ba392b7a82cdf (diff)
downloadop-kernel-dev-5ce998cf6d1dbb28f14dea879a366ed5348f9681.zip
op-kernel-dev-5ce998cf6d1dbb28f14dea879a366ed5348f9681.tar.gz
Blackfin arch: Check for Anomaly 05000182
IMDMA does not operate to full speed for 600MHz and higher devices Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/blackfin/kernel/bfin_dma_5xx.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c
index fd5448d..d54f190 100644
--- a/arch/blackfin/kernel/bfin_dma_5xx.c
+++ b/arch/blackfin/kernel/bfin_dma_5xx.c
@@ -90,6 +90,17 @@ int request_dma(unsigned int channel, char *device_id)
{
pr_debug("request_dma() : BEGIN \n");
+
+#if defined(CONFIG_BF561) && ANOMALY_05000182
+ if (channel >= CH_IMEM_STREAM0_DEST && channel <= CH_IMEM_STREAM1_DEST) {
+ if (get_cclk() > 500000000) {
+ printk(KERN_WARNING
+ "Request IMDMA failed due to ANOMALY 05000182\n");
+ return -EFAULT;
+ }
+ }
+#endif
+
mutex_lock(&(dma_ch[channel].dmalock));
if ((dma_ch[channel].chan_status == DMA_CHANNEL_REQUESTED)
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