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authorBen Dooks <ben-linux@fluff.org>2008-01-28 13:01:20 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-01-28 13:20:50 +0000
commitc6709e8ef5752314c22c75bc7575f9be390e215b (patch)
treeb263b43370faf705141dfee1bd2d8300c00fe2c5 /arch/arm/plat-s3c24xx
parent67d729adc0e76e21c82a2c59853f25f5f784ca79 (diff)
[ARM] 4780/1: S3C2412: Allow for seperate DMA channels for TX and RX
The current S3C24XX DMA code does not allow for an peripheral that has one channel for RX and another for TX. This patch adds a per-cpu dma operation to select the transmit or receive channel, and adds support to the S3C2412 for the seperate DMA channels for TX and RX. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/plat-s3c24xx')
-rw-r--r--arch/arm/plat-s3c24xx/dma.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/arch/arm/plat-s3c24xx/dma.c b/arch/arm/plat-s3c24xx/dma.c
index aae1b9cbaf4..10ef3995b11 100644
--- a/arch/arm/plat-s3c24xx/dma.c
+++ b/arch/arm/plat-s3c24xx/dma.c
@@ -1184,7 +1184,7 @@ int s3c2410_dma_devconfig(int channel,
dma_wrreg(chan, S3C2410_DMA_DIDSTC, (0<<1) | (0<<0));
chan->addr_reg = dma_regaddr(chan, S3C2410_DMA_DIDST);
- return 0;
+ break;
case S3C2410_DMASRC_MEM:
/* source is memory */
@@ -1195,11 +1195,19 @@ int s3c2410_dma_devconfig(int channel,
dma_wrreg(chan, S3C2410_DMA_DIDSTC, hwcfg & 3);
chan->addr_reg = dma_regaddr(chan, S3C2410_DMA_DISRC);
- return 0;
+ break;
+
+ default:
+ printk(KERN_ERR "dma%d: invalid source type (%d)\n",
+ channel, source);
+
+ return -EINVAL;
}
- printk(KERN_ERR "dma%d: invalid source type (%d)\n", channel, source);
- return -EINVAL;
+ if (dma_sel.direction != NULL)
+ (dma_sel.direction)(chan, chan->map, source);
+
+ return 0;
}
EXPORT_SYMBOL(s3c2410_dma_devconfig);