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| author | Viresh KUMAR <viresh.kumar@st.com> | 2011-03-04 13:12:51 +0300 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2011-03-06 22:42:28 +0300 |
| commit | ee66509d7f354eecb45ac99f21ea6aa8650dea7e (patch) | |
| tree | 206438e7c0ef9a7f0633fe44d6f306fdbf4b0b4e /drivers/dma/dw_dmac.c | |
| parent | 59c22fc11d12b69da36c6585a38229863ba0bb16 (diff) | |
| download | linux-ee66509d7f354eecb45ac99f21ea6aa8650dea7e.tar.xz | |
dw_dmac: Allow src/dst msize & flow controller to be configured at runtime
Msize or Burst Size is peripheral dependent in case of prep_slave_sg and
cyclic_prep transfers, and in case of memcpy transfers it is platform dependent.
So msize configuration must come from platform data.
Also some peripherals (ex: JPEG), need to be flow controller for dma transfers,
so this information in case of slave_sg & cyclic_prep transfers must come from
platform data.
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/dw_dmac.c')
| -rw-r--r-- | drivers/dma/dw_dmac.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c index 318a342fc7ec..90ea08a53d62 100644 --- a/drivers/dma/dw_dmac.c +++ b/drivers/dma/dw_dmac.c @@ -36,9 +36,11 @@ struct dw_dma_slave *__slave = (private); \ int dms = __slave ? __slave->dst_master : 0; \ int sms = __slave ? __slave->src_master : 1; \ + u8 smsize = __slave ? __slave->src_msize : 0; \ + u8 dmsize = __slave ? __slave->dst_msize : 0; \ \ - (DWC_CTLL_DST_MSIZE(0) \ - | DWC_CTLL_SRC_MSIZE(0) \ + (DWC_CTLL_DST_MSIZE(dmsize) \ + | DWC_CTLL_SRC_MSIZE(smsize) \ | DWC_CTLL_LLP_D_EN \ | DWC_CTLL_LLP_S_EN \ | DWC_CTLL_DMS(dms) \ @@ -683,7 +685,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, | DWC_CTLL_DST_WIDTH(reg_width) | DWC_CTLL_DST_FIX | DWC_CTLL_SRC_INC - | DWC_CTLL_FC_M2P); + | DWC_CTLL_FC(dws->fc)); reg = dws->tx_reg; for_each_sg(sgl, sg, sg_len, i) { struct dw_desc *desc; @@ -728,7 +730,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, | DWC_CTLL_SRC_WIDTH(reg_width) | DWC_CTLL_DST_INC | DWC_CTLL_SRC_FIX - | DWC_CTLL_FC_P2M); + | DWC_CTLL_FC(dws->fc)); reg = dws->rx_reg; for_each_sg(sgl, sg, sg_len, i) { @@ -1146,7 +1148,7 @@ struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan, | DWC_CTLL_SRC_WIDTH(reg_width) | DWC_CTLL_DST_FIX | DWC_CTLL_SRC_INC - | DWC_CTLL_FC_M2P + | DWC_CTLL_FC(dws->fc) | DWC_CTLL_INT_EN); break; case DMA_FROM_DEVICE: @@ -1157,7 +1159,7 @@ struct dw_cyclic_desc *dw_dma_cyclic_prep(struct dma_chan *chan, | DWC_CTLL_DST_WIDTH(reg_width) | DWC_CTLL_DST_INC | DWC_CTLL_SRC_FIX - | DWC_CTLL_FC_P2M + | DWC_CTLL_FC(dws->fc) | DWC_CTLL_INT_EN); break; default: |