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>
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 @@
bool dualmaster;
bool nomadik;
bool pl080s;
+ u32 max_transfer_size;
};
/**
@@ -783,6 +784,7 @@
break;
}
+ tsize &= PL080_CONTROL_TRANSFER_SIZE_MASK;
retbits |= tsize << PL080_CONTROL_TRANSFER_SIZE_SHIFT;
return retbits;
}
@@ -1050,7 +1052,7 @@
* 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 @@
.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 @@
.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[] = {