diff options
Diffstat (limited to 'drivers/dma/tegra20-apb-dma.c')
| -rw-r--r-- | drivers/dma/tegra20-apb-dma.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/drivers/dma/tegra20-apb-dma.c b/drivers/dma/tegra20-apb-dma.c index b9d75a54c896..9a558e30c461 100644 --- a/drivers/dma/tegra20-apb-dma.c +++ b/drivers/dma/tegra20-apb-dma.c @@ -353,7 +353,8 @@ static int tegra_dma_slave_config(struct dma_chan *dc, } memcpy(&tdc->dma_sconfig, sconfig, sizeof(*sconfig)); - if (tdc->slave_id == TEGRA_APBDMA_SLAVE_ID_INVALID) { + if (tdc->slave_id == TEGRA_APBDMA_SLAVE_ID_INVALID && + sconfig->device_fc) { if (sconfig->slave_id > TEGRA_APBDMA_CSR_REQ_SEL_MASK) return -EINVAL; tdc->slave_id = sconfig->slave_id; @@ -970,8 +971,13 @@ static struct dma_async_tx_descriptor *tegra_dma_prep_slave_sg( TEGRA_APBDMA_AHBSEQ_WRAP_SHIFT; ahb_seq |= TEGRA_APBDMA_AHBSEQ_BUS_WIDTH_32; - csr |= TEGRA_APBDMA_CSR_ONCE | TEGRA_APBDMA_CSR_FLOW; - csr |= tdc->slave_id << TEGRA_APBDMA_CSR_REQ_SEL_SHIFT; + csr |= TEGRA_APBDMA_CSR_ONCE; + + if (tdc->slave_id != TEGRA_APBDMA_SLAVE_ID_INVALID) { + csr |= TEGRA_APBDMA_CSR_FLOW; + csr |= tdc->slave_id << TEGRA_APBDMA_CSR_REQ_SEL_SHIFT; + } + if (flags & DMA_PREP_INTERRUPT) csr |= TEGRA_APBDMA_CSR_IE_EOC; @@ -1110,10 +1116,13 @@ static struct dma_async_tx_descriptor *tegra_dma_prep_dma_cyclic( TEGRA_APBDMA_AHBSEQ_WRAP_SHIFT; ahb_seq |= TEGRA_APBDMA_AHBSEQ_BUS_WIDTH_32; - csr |= TEGRA_APBDMA_CSR_FLOW; + if (tdc->slave_id != TEGRA_APBDMA_SLAVE_ID_INVALID) { + csr |= TEGRA_APBDMA_CSR_FLOW; + csr |= tdc->slave_id << TEGRA_APBDMA_CSR_REQ_SEL_SHIFT; + } + if (flags & DMA_PREP_INTERRUPT) csr |= TEGRA_APBDMA_CSR_IE_EOC; - csr |= tdc->slave_id << TEGRA_APBDMA_CSR_REQ_SEL_SHIFT; apb_seq |= TEGRA_APBDMA_APBSEQ_WRAP_WORD_1; |