diff options
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/omap-dma.c | 64 |
1 files changed, 28 insertions, 36 deletions
diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c index 323eae2c9d08..ec7cc10d4594 100644 --- a/drivers/dma/omap-dma.c +++ b/drivers/dma/omap-dma.c @@ -60,8 +60,8 @@ struct omap_desc { uint8_t es; /* OMAP_DMA_DATA_TYPE_xxx */ uint8_t sync_mode; /* OMAP_DMA_SYNC_xxx */ uint8_t sync_type; /* OMAP_DMA_xxx_SYNC* */ - uint8_t periph_port; /* Peripheral port */ uint16_t cicr; /* CICR value */ + uint32_t csdp; /* CSDP value */ unsigned sglen; struct omap_sg sg[0]; @@ -240,14 +240,6 @@ static void omap_dma_start_desc(struct omap_chan *c) c->sgidx = 0; if (d->dir == DMA_DEV_TO_MEM) { - if (dma_omap1()) { - val = c->plat->dma_read(CSDP, c->dma_ch); - val &= ~(0x1f << 9 | 0x1f << 2); - val |= OMAP_DMA_PORT_EMIFF << 9; - val |= d->periph_port << 2; - c->plat->dma_write(val, CSDP, c->dma_ch); - } - val = c->plat->dma_read(CCR, c->dma_ch); val &= ~(0x03 << 14 | 0x03 << 12); val |= OMAP_DMA_AMODE_POST_INC << 14; @@ -258,14 +250,6 @@ static void omap_dma_start_desc(struct omap_chan *c) c->plat->dma_write(0, CSEI, c->dma_ch); c->plat->dma_write(d->fi, CSFI, c->dma_ch); } else { - if (dma_omap1()) { - val = c->plat->dma_read(CSDP, c->dma_ch); - val &= ~(0x1f << 9 | 0x1f << 2); - val |= d->periph_port << 9; - val |= OMAP_DMA_PORT_EMIFF << 2; - c->plat->dma_write(val, CSDP, c->dma_ch); - } - val = c->plat->dma_read(CCR, c->dma_ch); val &= ~(0x03 << 12 | 0x03 << 14); val |= OMAP_DMA_AMODE_CONSTANT << 14; @@ -277,10 +261,7 @@ static void omap_dma_start_desc(struct omap_chan *c) c->plat->dma_write(d->fi, CDFI, c->dma_ch); } - val = c->plat->dma_read(CSDP, c->dma_ch); - val &= ~0x03; - val |= d->es; - c->plat->dma_write(val, CSDP, c->dma_ch); + c->plat->dma_write(d->csdp, CSDP, c->dma_ch); if (dma_omap1()) { val = c->plat->dma_read(CCR, c->dma_ch); @@ -602,13 +583,21 @@ static struct dma_async_tx_descriptor *omap_dma_prep_slave_sg( d->es = es; d->sync_mode = OMAP_DMA_SYNC_FRAME; d->sync_type = sync_type; - d->periph_port = OMAP_DMA_PORT_TIPB; d->cicr = OMAP_DMA_DROP_IRQ | OMAP_DMA_BLOCK_IRQ; + d->csdp = es; - if (dma_omap1()) + if (dma_omap1()) { d->cicr |= OMAP1_DMA_TOUT_IRQ; - else + + if (dir == DMA_DEV_TO_MEM) + d->csdp |= OMAP_DMA_PORT_EMIFF << 9 | + OMAP_DMA_PORT_TIPB << 2; + else + d->csdp |= OMAP_DMA_PORT_TIPB << 9 | + OMAP_DMA_PORT_EMIFF << 2; + } else { d->cicr |= OMAP2_DMA_MISALIGNED_ERR_IRQ | OMAP2_DMA_TRANS_ERR_IRQ; + } /* * Build our scatterlist entries: each contains the address, @@ -690,7 +679,6 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic( else d->sync_mode = OMAP_DMA_SYNC_ELEMENT; d->sync_type = sync_type; - d->periph_port = OMAP_DMA_PORT_MPUI; d->sg[0].addr = buf_addr; d->sg[0].en = period_len / es_bytes[es]; d->sg[0].fn = buf_len / period_len; @@ -699,11 +687,24 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic( if (flags & DMA_PREP_INTERRUPT) d->cicr |= OMAP_DMA_FRAME_IRQ; - if (dma_omap1()) + d->csdp = es; + + if (dma_omap1()) { d->cicr |= OMAP1_DMA_TOUT_IRQ; - else + + if (dir == DMA_DEV_TO_MEM) + d->csdp |= OMAP_DMA_PORT_EMIFF << 9 | + OMAP_DMA_PORT_MPUI << 2; + else + d->csdp |= OMAP_DMA_PORT_MPUI << 9 | + OMAP_DMA_PORT_EMIFF << 2; + } else { d->cicr |= OMAP2_DMA_MISALIGNED_ERR_IRQ | OMAP2_DMA_TRANS_ERR_IRQ; + /* src and dst burst mode 16 */ + d->csdp |= 3 << 14 | 3 << 7; + } + if (!c->cyclic) { c->cyclic = true; @@ -716,15 +717,6 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic( } } - if (dma_omap2plus()) { - uint32_t val; - - val = c->plat->dma_read(CSDP, c->dma_ch); - val |= 0x03 << 7; /* src burst mode 16 */ - val |= 0x03 << 14; /* dst burst mode 16 */ - c->plat->dma_write(val, CSDP, c->dma_ch); - } - return vchan_tx_prep(&c->vc, &d->vd, flags); } |