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authorTomasz Figa <tomasz.figa@gmail.com>2013-08-11 19:59:18 +0200
committerVinod Koul <vinod.koul@intel.com>2013-09-02 11:49:56 +0530
commit5110e51d127221c93f331841e601612b187b60f4 (patch)
tree7f8d34539615b1ab00bdef3413171eab4c59c5e0 /drivers/dma
parentda1b6c05b8b5bd9af060acb319360604a0890c2e (diff)
downloadop-kernel-dev-5110e51d127221c93f331841e601612b187b60f4.zip
op-kernel-dev-5110e51d127221c93f331841e601612b187b60f4.tar.gz
dmaengine: PL08x: Add support for different maximum transfer size
PL080S has separate register to store transfer size in, allowing single transfer to be much larger than in standard PL080. This patch makes the amba-pl08x driver aware of this and removes writing transfer size to reserved bits of CH_CONTROL register on PL080S, which was not a problem witn transfer sizes fitting the original bitfield of PL080, but now would overwrite other fields. Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/amba-pl08x.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 75915be..4e4c3df 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -115,6 +115,7 @@ struct vendor_data {
bool dualmaster;
bool nomadik;
bool pl080s;
+ u32 max_transfer_size;
};
/**
@@ -783,6 +784,7 @@ static inline u32 pl08x_cctl_bits(u32 cctl, u8 srcwidth, u8 dstwidth,
break;
}
+ tsize &= PL080_CONTROL_TRANSFER_SIZE_MASK;
retbits |= tsize << PL080_CONTROL_TRANSFER_SIZE_SHIFT;
return retbits;
}
@@ -1050,7 +1052,7 @@ static int pl08x_fill_llis_for_desc(struct pl08x_driver_data *pl08x,
* MIN(buswidths)
*/
max_bytes_per_lli = bd.srcbus.buswidth *
- PL080_CONTROL_TRANSFER_SIZE_MASK;
+ pl08x->vd->max_transfer_size;
dev_vdbg(&pl08x->adev->dev,
"%s max bytes per lli = %zu\n",
__func__, max_bytes_per_lli);
@@ -2152,6 +2154,7 @@ static struct vendor_data vendor_pl080 = {
.config_offset = PL080_CH_CONFIG,
.channels = 8,
.dualmaster = true,
+ .max_transfer_size = PL080_CONTROL_TRANSFER_SIZE_MASK,
};
static struct vendor_data vendor_nomadik = {
@@ -2159,18 +2162,21 @@ static struct vendor_data vendor_nomadik = {
.channels = 8,
.dualmaster = true,
.nomadik = true,
+ .max_transfer_size = PL080_CONTROL_TRANSFER_SIZE_MASK,
};
static struct vendor_data vendor_pl080s = {
.config_offset = PL080S_CH_CONFIG,
.channels = 8,
.pl080s = true,
+ .max_transfer_size = PL080S_CONTROL_TRANSFER_SIZE_MASK,
};
static struct vendor_data vendor_pl081 = {
.config_offset = PL080_CH_CONFIG,
.channels = 2,
.dualmaster = false,
+ .max_transfer_size = PL080_CONTROL_TRANSFER_SIZE_MASK,
};
static struct amba_id pl08x_ids[] = {
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