unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
1
Fork 0
Code Pull requests 5 Wiki Activity

dma: rcar-audmapp: enable .set_slave

Browse source 
Current .set_slave callback did nothing,
since it assumed src/dst address come from platform settings.
But, it isn't good match to DT probing.
This patch enables .set_slave callback to this issue.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Kuninori Morimoto 2014-06-18 01:59:28 -07:00 committed by Simon Horman
parent 7171511eae
commit 016b10f4ea
1 changed files with 25 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

34
drivers/dma/sh/rcar-audmapp.c
View file

@ -47,6 +47,7 @@ struct audmapp_chan {
struct shdma_chan shdma_chan;
struct audmapp_slave_config *config;
void __iomem *base;
dma_addr_t slave_addr;
};
struct audmapp_device {
@ -56,7 +57,14 @@ struct audmapp_device {
void __iomem *chan_reg;
};
struct audmapp_desc {
struct shdma_desc shdma_desc;
dma_addr_t src;
dma_addr_t dst;
};
#define to_chan(chan) container_of(chan, struct audmapp_chan, shdma_chan)
#define to_desc(sdesc) container_of(sdesc, struct audmapp_desc, shdma_desc)
#define to_dev(chan) container_of(chan->shdma_chan.dma_chan.device, \
struct audmapp_device, shdma_dev.dma_dev)
@ -90,19 +98,20 @@ static void audmapp_halt(struct shdma_chan *schan)
}
static void audmapp_start_xfer(struct shdma_chan *schan,
struct shdma_desc *sdecs)
struct shdma_desc *sdesc)
{
struct audmapp_chan *auchan = to_chan(schan);
struct audmapp_device *audev = to_dev(auchan);
struct audmapp_desc *desc = to_desc(sdesc);
struct audmapp_slave_config *cfg = auchan->config;
struct device *dev = audev->dev;
u32 chcr = cfg->chcr | PDMACHCR_DE;
dev_dbg(dev, "src/dst/chcr = %pad/%pad/%x\n",
&cfg->src, &cfg->dst, cfg->chcr);
dev_dbg(dev, "src/dst/chcr = %pad/%pad/%08x\n",
&desc->src, &desc->dst, chcr);
audmapp_write(auchan, cfg->src, PDMASAR);
audmapp_write(auchan, cfg->dst, PDMADAR);
audmapp_write(auchan, desc->src, PDMASAR);
audmapp_write(auchan, desc->dst, PDMADAR);
audmapp_write(auchan, chcr, PDMACHCR);
}
@ -137,14 +146,16 @@ static int audmapp_set_slave(struct shdma_chan *schan, int slave_id,
return 0;
auchan->config = cfg;
auchan->slave_addr = slave_addr ? : cfg->dst;
return 0;
}
static int audmapp_desc_setup(struct shdma_chan *schan,
struct shdma_desc *sdecs,
struct shdma_desc *sdesc,
dma_addr_t src, dma_addr_t dst, size_t *len)
{
struct audmapp_desc *desc = to_desc(sdesc);
struct audmapp_chan *auchan = to_chan(schan);
struct audmapp_slave_config *cfg = auchan->config;
@ -154,6 +165,9 @@ static int audmapp_desc_setup(struct shdma_chan *schan,
if (*len > (size_t)AUDMAPP_LEN_MAX)
*len = (size_t)AUDMAPP_LEN_MAX;
desc->src = src;
desc->dst = dst;
return 0;
}
@ -164,7 +178,9 @@ static void audmapp_setup_xfer(struct shdma_chan *schan,
static dma_addr_t audmapp_slave_addr(struct shdma_chan *schan)
{
return 0; /* always fixed address */
struct audmapp_chan *auchan = to_chan(schan);
return auchan->slave_addr;
}
static bool audmapp_channel_busy(struct shdma_chan *schan)
@ -183,7 +199,7 @@ static bool audmapp_desc_completed(struct shdma_chan *schan,
static struct shdma_desc *audmapp_embedded_desc(void *buf, int i)
{
return &((struct shdma_desc *)buf)[i];
return &((struct audmapp_desc *)buf)[i].shdma_desc;
}
static const struct shdma_ops audmapp_shdma_ops = {
@ -260,7 +276,7 @@ static int audmapp_probe(struct platform_device *pdev)
sdev = &audev->shdma_dev;
sdev->ops = &audmapp_shdma_ops;
sdev->desc_size = sizeof(struct shdma_desc);
sdev->desc_size = sizeof(struct audmapp_desc);
dma_dev = &sdev->dma_dev;
dma_dev->copy_align = LOG2_DEFAULT_XFER_SIZE;