diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-01-14 23:58:10 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2014-04-04 00:32:53 +0100 |
| commit | aa4c5b962a7a03eb6b43b3d2677c3677022c1223 (patch) | |
| tree | e3267b6a64076ea5d7fa511db19c5e9fb6f422dd /drivers/dma | |
| parent | 6ddeb6d844596cac13c4a3665c0bd61f074a81a7 (diff) | |
| download | linux-aa4c5b962a7a03eb6b43b3d2677c3677022c1223.tar.bz2 | |
dmaengine: omap-dma: more consolidation of CCR register setup
We can move the handling of the DMA synchronisation control out of the
prepare functions; this can be pre-calculated when the DMA channel has
been allocated, so we don't need to duplicate this in both prepare
functions.
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/omap-dma.c | 46 |
1 files changed, 18 insertions, 28 deletions
diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c index ec98e718de70..64ceca2920b8 100644 --- a/drivers/dma/omap-dma.c +++ b/drivers/dma/omap-dma.c @@ -41,6 +41,7 @@ struct omap_chan { struct list_head node; void __iomem *channel_base; const struct omap_dma_reg *reg_map; + uint32_t ccr; struct dma_slave_config cfg; unsigned dma_sig; @@ -552,6 +553,21 @@ static int omap_dma_alloc_chan_resources(struct dma_chan *chan) } } + if (dma_omap1()) { + if (__dma_omap16xx(od->plat->dma_attr)) { + c->ccr = CCR_OMAP31_DISABLE; + /* Duplicate what plat-omap/dma.c does */ + c->ccr |= c->dma_ch + 1; + } else { + c->ccr = c->dma_sig & 0x1f; + } + } else { + c->ccr = c->dma_sig & 0x1f; + c->ccr |= (c->dma_sig & ~0x1f) << 14; + } + if (od->plat->errata & DMA_ERRATA_IFRAME_BUFFERING) + c->ccr |= CCR_BUFFERING_DISABLE; + return ret; } @@ -787,7 +803,7 @@ static struct dma_async_tx_descriptor *omap_dma_prep_slave_sg( d->dev_addr = dev_addr; d->es = es; - d->ccr = CCR_SYNC_FRAME; + d->ccr = c->ccr | CCR_SYNC_FRAME; if (dir == DMA_DEV_TO_MEM) d->ccr |= CCR_DST_AMODE_POSTINC | CCR_SRC_AMODE_CONSTANT; else @@ -797,14 +813,6 @@ static struct dma_async_tx_descriptor *omap_dma_prep_slave_sg( d->csdp = es; if (dma_omap1()) { - if (__dma_omap16xx(od->plat->dma_attr)) { - d->ccr |= CCR_OMAP31_DISABLE; - /* Duplicate what plat-omap/dma.c does */ - d->ccr |= c->dma_ch + 1; - } else { - d->ccr |= c->dma_sig & 0x1f; - } - d->cicr |= CICR_TOUT_IE; if (dir == DMA_DEV_TO_MEM) @@ -812,16 +820,11 @@ static struct dma_async_tx_descriptor *omap_dma_prep_slave_sg( else d->csdp |= CSDP_DST_PORT_TIPB | CSDP_SRC_PORT_EMIFF; } else { - d->ccr |= (c->dma_sig & ~0x1f) << 14; - d->ccr |= c->dma_sig & 0x1f; - if (dir == DMA_DEV_TO_MEM) d->ccr |= CCR_TRIGGER_SRC; d->cicr |= CICR_MISALIGNED_ERR_IE | CICR_TRANS_ERR_IE; } - if (od->plat->errata & DMA_ERRATA_IFRAME_BUFFERING) - d->ccr |= CCR_BUFFERING_DISABLE; if (od->plat->errata & DMA_ERRATA_PARALLEL_CHANNELS) d->clnk_ctrl = c->dma_ch; @@ -903,7 +906,7 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic( d->sg[0].fn = buf_len / period_len; d->sglen = 1; - d->ccr = 0; + d->ccr = c->ccr; if (dir == DMA_DEV_TO_MEM) d->ccr |= CCR_DST_AMODE_POSTINC | CCR_SRC_AMODE_CONSTANT; else @@ -916,14 +919,6 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic( d->csdp = es; if (dma_omap1()) { - if (__dma_omap16xx(od->plat->dma_attr)) { - d->ccr |= CCR_OMAP31_DISABLE; - /* Duplicate what plat-omap/dma.c does */ - d->ccr |= c->dma_ch + 1; - } else { - d->ccr |= c->dma_sig & 0x1f; - } - d->cicr |= CICR_TOUT_IE; if (dir == DMA_DEV_TO_MEM) @@ -931,9 +926,6 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic( else d->csdp |= CSDP_DST_PORT_MPUI | CSDP_SRC_PORT_EMIFF; } else { - d->ccr |= (c->dma_sig & ~0x1f) << 14; - d->ccr |= c->dma_sig & 0x1f; - if (burst) d->ccr |= CCR_SYNC_PACKET; else @@ -946,8 +938,6 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic( d->csdp |= CSDP_DST_BURST_64 | CSDP_SRC_BURST_64; } - if (od->plat->errata & DMA_ERRATA_IFRAME_BUFFERING) - d->ccr |= CCR_BUFFERING_DISABLE; if (__dma_omap15xx(od->plat->dma_attr)) d->ccr |= CCR_AUTO_INIT | CCR_REPEAT; |