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authorBoojin Kim <boojin.kim@samsung.com>2016-01-22 19:06:44 +0800
committerVinod Koul <vinod.koul@intel.com>2016-02-09 09:01:41 +0530
commit848e9776fee424b9368c72377de5d3509b17937c (patch)
tree2271d62b826e4089c5f120cff74c5896e1cad2da /drivers/dma/pl330.c
parent92e963f50fc74041b5e9e744c330dca48e04f08d (diff)
downloadblackbird-op-linux-848e9776fee424b9368c72377de5d3509b17937c.tar.gz
blackbird-op-linux-848e9776fee424b9368c72377de5d3509b17937c.zip
dmaengine: pl330: support burst mode for dev-to-mem and mem-to-dev transmit
This patch adds to support burst mode for dev-to-mem and mem-to-dev transmit. Signed-off-by: Boojin Kim <boojin.kim@samsung.com> Signed-off-by: Addy Ke <addy.ke@rock-chips.com> Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> cc: Heiko Stuebner <heiko@sntech.de> cc: Doug Anderson <dianders@chromium.org> cc: Olof Johansson <olof@lixom.net> Reviewed-by: Sonny Rao <sonnyrao@chromium.org> Signed-off-by: Caesar Wang <wxt@rock-chips.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/pl330.c')
-rw-r--r--drivers/dma/pl330.c20
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 17ee758b419f..7cdf8d4c7947 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -1141,10 +1141,13 @@ static inline int _ldst_devtomem(unsigned dry_run, u8 buf[],
const struct _xfer_spec *pxs, int cyc)
{
int off = 0;
+ enum pl330_cond cond;
+
+ cond = (pxs->desc->rqcfg.brst_len == 1) ? SINGLE : BURST;
while (cyc--) {
- off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->desc->peri);
- off += _emit_LDP(dry_run, &buf[off], SINGLE, pxs->desc->peri);
+ off += _emit_WFP(dry_run, &buf[off], cond, pxs->desc->peri);
+ off += _emit_LDP(dry_run, &buf[off], cond, pxs->desc->peri);
off += _emit_ST(dry_run, &buf[off], ALWAYS);
off += _emit_FLUSHP(dry_run, &buf[off], pxs->desc->peri);
}
@@ -1156,11 +1159,14 @@ static inline int _ldst_memtodev(unsigned dry_run, u8 buf[],
const struct _xfer_spec *pxs, int cyc)
{
int off = 0;
+ enum pl330_cond cond;
+
+ cond = (pxs->desc->rqcfg.brst_len == 1) ? SINGLE : BURST;
while (cyc--) {
- off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->desc->peri);
+ off += _emit_WFP(dry_run, &buf[off], cond, pxs->desc->peri);
off += _emit_LD(dry_run, &buf[off], ALWAYS);
- off += _emit_STP(dry_run, &buf[off], SINGLE, pxs->desc->peri);
+ off += _emit_STP(dry_run, &buf[off], cond, pxs->desc->peri);
off += _emit_FLUSHP(dry_run, &buf[off], pxs->desc->peri);
}
@@ -1199,7 +1205,7 @@ static inline int _loop(unsigned dry_run, u8 buf[],
struct _arg_LPEND lpend;
if (*bursts == 1)
- return _bursts(dry_run, buf, pxs, 1);
+ return _bursts(pl330, dry_run, buf, pxs, 1);
/* Max iterations possible in DMALP is 256 */
if (*bursts >= 256*256) {
@@ -2560,7 +2566,7 @@ static struct dma_async_tx_descriptor *pl330_prep_dma_cyclic(
desc->rqtype = direction;
desc->rqcfg.brst_size = pch->burst_sz;
- desc->rqcfg.brst_len = 1;
+ desc->rqcfg.brst_len = pch->burst_len;
desc->bytes_requested = period_len;
fill_px(&desc->px, dst, src, period_len);
@@ -2705,7 +2711,7 @@ pl330_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
}
desc->rqcfg.brst_size = pch->burst_sz;
- desc->rqcfg.brst_len = 1;
+ desc->rqcfg.brst_len = pch->burst_len;
desc->rqtype = direction;
desc->bytes_requested = sg_dma_len(sg);
}
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