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DMA: PL330: Update PL330 DMA API driver

Browse source 
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 <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Acked-by: Vinod Koul <[email protected]>
Cc: Dan Williams <[email protected]>
Signed-off-by: Kukjin Kim <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
This commit is contained in:
Boojin Kim 2011-09-02 09:44:30 +09:00 • committed by Vinod Koul
commit 1b9bb715e7
3 changed files with 12 additions and 11 deletions
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3
drivers/dma/Kconfig
View file

@ -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

14
drivers/dma/pl330.c
View file

@ -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;
}