diff options
| author | Boojin Kim <boojin.kim@samsung.com> | 2011-09-02 09:44:30 +0900 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2011-09-14 11:10:01 +0530 |
| commit | 1b9bb715e7c4c189c4215a11a09e2ccb16598d86 (patch) | |
| tree | e274c2a58ec31185e0871255a5fd64c177ee4898 | |
| parent | a2f5203fec3c06d68a6bb45ad41f2adebf9ac5e0 (diff) | |
| download | op-kernel-dev-1b9bb715e7c4c189c4215a11a09e2ccb16598d86.zip op-kernel-dev-1b9bb715e7c4c189c4215a11a09e2ccb16598d86.tar.gz | |
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 <boojin.kim@samsung.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
| -rw-r--r-- | drivers/dma/Kconfig | 3 | ||||
| -rw-r--r-- | drivers/dma/pl330.c | 14 | ||||
| -rw-r--r-- | include/linux/amba/pl330.h | 6 |
3 files changed, 12 insertions, 11 deletions
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig index 2e3b3d3..ab8f469 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 0b99af1..d5829c7 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -18,6 +18,7 @@ #include <linux/amba/bus.h> #include <linux/amba/pl330.h> #include <linux/pm_runtime.h> +#include <linux/scatterlist.h> #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 cbee7de..d12f077 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 { |
