From mboxrd@z Thu Jan 1 00:00:00 1970 From: Boojin Kim Subject: [PATCH v2 1/4] DMA: pl330: support burst mode for dev-to-mem and mem-to-dev transmit Date: Fri, 22 Feb 2013 17:04:15 +0900 Message-ID: <000001ce10d3$354dd440$9fe97cc0$%kim@samsung.com> Cc: 'Vinod Koul' , 'Dan Williams' , 'Russell King' , 'Kukjin Kim' , 'Grant Likely' , 'Mark Brown' , 'Rob Herring' , 'Sangbeom Kim' , 'Boojin Kim' To: linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, spi-devel-general@lists.sourceforge.net, alsa-devel@alsa-project.org Return-path: Content-language: ko Sender: linux-samsung-soc-owner@vger.kernel.org List-Id: linux-spi.vger.kernel.org This patch adds to support burst mode for dev-to-mem and mem-to-dev transmit Change-Id: I9723e49383416773699cf7735168177c8d036f30 Signed-off-by: Boojin Kim --- drivers/dma/pl330.c | 12 +++++++----- 1 files changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c index 80680ee..c67f037 100644 --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -1271,10 +1271,11 @@ static inline int _ldst_devtomem(unsigned dry_run, u8 buf[], const struct _xfer_spec *pxs, int cyc) { int off = 0; + enum pl330_cond cond = (pxs->r->cfg->brst_len == 1) ? SINGLE : BURST; while (cyc--) { - off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->r->peri); - off += _emit_LDP(dry_run, &buf[off], SINGLE, pxs->r->peri); + off += _emit_WFP(dry_run, &buf[off], cond, pxs->r->peri); + off += _emit_LDP(dry_run, &buf[off], cond, pxs->r->peri); off += _emit_ST(dry_run, &buf[off], ALWAYS); off += _emit_FLUSHP(dry_run, &buf[off], pxs->r->peri); } @@ -1286,11 +1287,12 @@ static inline int _ldst_memtodev(unsigned dry_run, u8 buf[], const struct _xfer_spec *pxs, int cyc) { int off = 0; + enum pl330_cond cond = (pxs->r->cfg->brst_len == 1) ? SINGLE : BURST; while (cyc--) { - off += _emit_WFP(dry_run, &buf[off], SINGLE, pxs->r->peri); + off += _emit_WFP(dry_run, &buf[off], cond, pxs->r->peri); off += _emit_LD(dry_run, &buf[off], ALWAYS); - off += _emit_STP(dry_run, &buf[off], SINGLE, pxs->r->peri); + off += _emit_STP(dry_run, &buf[off], cond, pxs->r->peri); off += _emit_FLUSHP(dry_run, &buf[off], pxs->r->peri); } @@ -2835,7 +2837,7 @@ 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; } /* Return the last desc in the chain */ -- 1.7.5.4