From 1b9bb715e7c4c189c4215a11a09e2ccb16598d86 Mon Sep 17 00:00:00 2001 From: Boojin Kim Date: Fri, 2 Sep 2011 09:44:30 +0900 Subject: [PATCH] DMA: PL330: Update PL330 DMA API driver This patch updates following 3 items. 1. Removes unneccessary code. 2. Add AMBA, PL330 configuration 3. Change the meaning of 'peri_id' variable from PL330 event number to specific dma id by user. Signed-off-by: Boojin Kim Acked-by: Linus Walleij Acked-by: Vinod Koul Cc: Dan Williams Signed-off-by: Kukjin Kim Signed-off-by: Vinod Koul --- drivers/dma/Kconfig | 3 ++- drivers/dma/pl330.c | 14 +++++++++----- include/linux/amba/pl330.h | 6 +----- 3 files changed, 12 insertions(+), 11 deletions(-) diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index 2e3b3d38c465..ab8f469f5cf8 100644 --- a/drivers/dma/Kconfig +++ b/drivers/dma/Kconfig @@ -193,7 +193,8 @@ config ARCH_HAS_ASYNC_TX_FIND_CHANNEL config PL330_DMA tristate "DMA API Driver for PL330" select DMA_ENGINE - depends on PL330 + depends on ARM_AMBA + select PL330 help Select if your platform has one or more PL330 DMACs. You need to provide platform specific settings via diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index 0b99af18f9a1..d5829c734fad 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -18,6 +18,7 @@ #include #include #include +#include #define NR_DEFAULT_DESC 16 @@ -69,6 +70,10 @@ struct dma_pl330_chan { * NULL if the channel is available to be acquired. */ void *pl330_chid; + + /* For D-to-M and M-to-D channels */ + int burst_sz; /* the peripheral fifo width */ + dma_addr_t fifo_addr; }; struct dma_pl330_dmac { @@ -456,7 +461,7 @@ static struct dma_pl330_desc *pl330_get_desc(struct dma_pl330_chan *pch) if (peri) { desc->req.rqtype = peri->rqtype; - desc->req.peri = peri->peri_id; + desc->req.peri = pch->chan.chan_id; } else { desc->req.rqtype = MEMTOMEM; desc->req.peri = 0; @@ -582,7 +587,7 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, struct dma_pl330_peri *peri = chan->private; struct scatterlist *sg; unsigned long flags; - int i, burst_size; + int i; dma_addr_t addr; if (unlikely(!pch || !sgl || !sg_len || !peri)) @@ -598,8 +603,7 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, return NULL; } - addr = peri->fifo_addr; - burst_size = peri->burst_sz; + addr = pch->fifo_addr; first = NULL; @@ -647,7 +651,7 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, sg_dma_address(sg), addr, sg_dma_len(sg)); } - desc->rqcfg.brst_size = burst_size; + desc->rqcfg.brst_size = pch->burst_sz; desc->rqcfg.brst_len = 1; } diff --git a/include/linux/amba/pl330.h b/include/linux/amba/pl330.h index cbee7de7dd36..d12f077a6daf 100644 --- a/include/linux/amba/pl330.h +++ b/include/linux/amba/pl330.h @@ -19,12 +19,8 @@ struct dma_pl330_peri { * Peri_Req i/f of the DMAC that is * peripheral could be reached from. */ - u8 peri_id; /* {0, 31} */ + u8 peri_id; /* specific dma id */ enum pl330_reqtype rqtype; - - /* For M->D and D->M Channels */ - int burst_sz; /* in power of 2 */ - dma_addr_t fifo_addr; }; struct dma_pl330_platdata { -- 2.39.5