From c6709e8ef5752314c22c75bc7575f9be390e215b Mon Sep 17 00:00:00 2001 From: Ben Dooks Date: Mon, 28 Jan 2008 13:01:20 +0100 Subject: [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 Signed-off-by: Russell King --- arch/arm/plat-s3c24xx/dma.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) (limited to 'arch/arm/plat-s3c24xx') diff --git a/arch/arm/plat-s3c24xx/dma.c b/arch/arm/plat-s3c24xx/dma.c index aae1b9cbaf44..10ef3995b114 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); -- cgit v1.2.2