From 74465b4ff9ac1da503025c0a0042e023bfa6505c Mon Sep 17 00:00:00 2001 From: Dan Williams Date: Tue, 6 Jan 2009 11:38:16 -0700 Subject: atmel-mci: convert to dma_request_channel and down-level dma_slave dma_request_channel provides an exclusive channel, so we no longer need to pass slave data through dmaengine. Cc: Haavard Skinnemoen Reviewed-by: Andrew Morton Signed-off-by: Dan Williams --- drivers/dma/dw_dmac.c | 25 ++++++------------------- 1 file changed, 6 insertions(+), 19 deletions(-) (limited to 'drivers/dma/dw_dmac.c') diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c index 377dafa37a2..dbd50804e5d 100644 --- a/drivers/dma/dw_dmac.c +++ b/drivers/dma/dw_dmac.c @@ -567,7 +567,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, if (unlikely(!dws || !sg_len)) return NULL; - reg_width = dws->slave.reg_width; + reg_width = dws->reg_width; prev = first = NULL; sg_len = dma_map_sg(chan->dev.parent, sgl, sg_len, direction); @@ -579,7 +579,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, | DWC_CTLL_DST_FIX | DWC_CTLL_SRC_INC | DWC_CTLL_FC_M2P); - reg = dws->slave.tx_reg; + reg = dws->tx_reg; for_each_sg(sgl, sg, sg_len, i) { struct dw_desc *desc; u32 len; @@ -625,7 +625,7 @@ dwc_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, | DWC_CTLL_SRC_FIX | DWC_CTLL_FC_P2M); - reg = dws->slave.rx_reg; + reg = dws->rx_reg; for_each_sg(sgl, sg, sg_len, i) { struct dw_desc *desc; u32 len; @@ -764,7 +764,6 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan, struct dw_dma_chan *dwc = to_dw_dma_chan(chan); struct dw_dma *dw = to_dw_dma(chan->device); struct dw_desc *desc; - struct dma_slave *slave; struct dw_dma_slave *dws; int i; u32 cfghi; @@ -772,12 +771,6 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan, dev_vdbg(&chan->dev, "alloc_chan_resources\n"); - /* Channels doing slave DMA can only handle one client. */ - if (dwc->dws || (client && client->slave)) { - if (chan->client_count) - return -EBUSY; - } - /* ASSERT: channel is idle */ if (dma_readl(dw, CH_EN) & dwc->mask) { dev_dbg(&chan->dev, "DMA channel not idle?\n"); @@ -789,23 +782,17 @@ static int dwc_alloc_chan_resources(struct dma_chan *chan, cfghi = DWC_CFGH_FIFO_MODE; cfglo = 0; - slave = client->slave; - if (slave) { + dws = dwc->dws; + if (dws) { /* * We need controller-specific data to set up slave * transfers. */ - BUG_ON(!slave->dma_dev || slave->dma_dev != dw->dma.dev); - - dws = container_of(slave, struct dw_dma_slave, slave); + BUG_ON(!dws->dma_dev || dws->dma_dev != dw->dma.dev); - dwc->dws = dws; cfghi = dws->cfg_hi; cfglo = dws->cfg_lo; - } else { - dwc->dws = NULL; } - channel_writel(dwc, CFG_LO, cfglo); channel_writel(dwc, CFG_HI, cfghi); -- cgit v1.2.3-18-g5258