diff options
Diffstat (limited to 'drivers/dma/sun4i-dma.c')
| -rw-r--r-- | drivers/dma/sun4i-dma.c | 48 |
1 files changed, 26 insertions, 22 deletions
diff --git a/drivers/dma/sun4i-dma.c b/drivers/dma/sun4i-dma.c index e397a50058c8..bbc2bda3b902 100644 --- a/drivers/dma/sun4i-dma.c +++ b/drivers/dma/sun4i-dma.c @@ -669,43 +669,41 @@ sun4i_dma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf, size_t len, dma_addr_t src, dest; u32 endpoints; int nr_periods, offset, plength, i; + u8 ram_type, io_mode, linear_mode; if (!is_slave_direction(dir)) { dev_err(chan2dev(chan), "Invalid DMA direction\n"); return NULL; } - if (vchan->is_dedicated) { - /* - * As we are using this just for audio data, we need to use - * normal DMA. There is nothing stopping us from supporting - * dedicated DMA here as well, so if a client comes up and - * requires it, it will be simple to implement it. - */ - dev_err(chan2dev(chan), - "Cyclic transfers are only supported on Normal DMA\n"); - return NULL; - } - contract = generate_dma_contract(); if (!contract) return NULL; contract->is_cyclic = 1; - /* Figure out the endpoints and the address we need */ + if (vchan->is_dedicated) { + io_mode = SUN4I_DDMA_ADDR_MODE_IO; + linear_mode = SUN4I_DDMA_ADDR_MODE_LINEAR; + ram_type = SUN4I_DDMA_DRQ_TYPE_SDRAM; + } else { + io_mode = SUN4I_NDMA_ADDR_MODE_IO; + linear_mode = SUN4I_NDMA_ADDR_MODE_LINEAR; + ram_type = SUN4I_NDMA_DRQ_TYPE_SDRAM; + } + if (dir == DMA_MEM_TO_DEV) { src = buf; dest = sconfig->dst_addr; - endpoints = SUN4I_DMA_CFG_SRC_DRQ_TYPE(SUN4I_NDMA_DRQ_TYPE_SDRAM) | - SUN4I_DMA_CFG_DST_DRQ_TYPE(vchan->endpoint) | - SUN4I_DMA_CFG_DST_ADDR_MODE(SUN4I_NDMA_ADDR_MODE_IO); + endpoints = SUN4I_DMA_CFG_DST_DRQ_TYPE(vchan->endpoint) | + SUN4I_DMA_CFG_DST_ADDR_MODE(io_mode) | + SUN4I_DMA_CFG_SRC_DRQ_TYPE(ram_type); } else { src = sconfig->src_addr; dest = buf; - endpoints = SUN4I_DMA_CFG_SRC_DRQ_TYPE(vchan->endpoint) | - SUN4I_DMA_CFG_SRC_ADDR_MODE(SUN4I_NDMA_ADDR_MODE_IO) | - SUN4I_DMA_CFG_DST_DRQ_TYPE(SUN4I_NDMA_DRQ_TYPE_SDRAM); + endpoints = SUN4I_DMA_CFG_DST_DRQ_TYPE(ram_type) | + SUN4I_DMA_CFG_SRC_DRQ_TYPE(vchan->endpoint) | + SUN4I_DMA_CFG_SRC_ADDR_MODE(io_mode); } /* @@ -747,8 +745,13 @@ sun4i_dma_prep_dma_cyclic(struct dma_chan *chan, dma_addr_t buf, size_t len, dest = buf + offset; /* Make the promise */ - promise = generate_ndma_promise(chan, src, dest, - plength, sconfig, dir); + if (vchan->is_dedicated) + promise = generate_ddma_promise(chan, src, dest, + plength, sconfig); + else + promise = generate_ndma_promise(chan, src, dest, + plength, sconfig, dir); + if (!promise) { /* TODO: should we free everything? */ return NULL; @@ -885,12 +888,13 @@ static int sun4i_dma_terminate_all(struct dma_chan *chan) } spin_lock_irqsave(&vchan->vc.lock, flags); - vchan_dma_desc_free_list(&vchan->vc, &head); /* Clear these so the vchan is usable again */ vchan->processing = NULL; vchan->pchan = NULL; spin_unlock_irqrestore(&vchan->vc.lock, flags); + vchan_dma_desc_free_list(&vchan->vc, &head); + return 0; } |