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dmaengine: pl330: support burst mode for dev-to-mem and mem-to-dev transmit

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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>
This commit is contained in:
Boojin Kim 2016-01-22 19:06:44 +08:00 committed by Vinod Koul
parent 92e963f50f
commit 848e9776fe
1 changed files with 13 additions and 7 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

20
drivers/dma/pl330.c
View file

@ -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);
}