Program the transfer parameters directly into the hardware, rather than using the functions in arch/arm/plat-omap/dma.c.
Signed-off-by: Russell King <[email protected]> --- drivers/dma/omap-dma.c | 144 ++++++++++++++++++++++++++++++++++++++++----- include/linux/omap-dma.h | 6 +- 2 files changed, 132 insertions(+), 18 deletions(-) diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c index 3c1bb34aad0a..dd233ca2cf5a 100644 --- a/drivers/dma/omap-dma.c +++ b/drivers/dma/omap-dma.c @@ -99,16 +99,96 @@ static void omap_dma_start_sg(struct omap_chan *c, struct omap_desc *d, unsigned idx) { struct omap_sg *sg = d->sg + idx; + uint32_t val; + + if (d->dir == DMA_DEV_TO_MEM) { + if (dma_omap1()) { + val = c->plat->dma_read(CSDP, c->dma_ch); + val &= ~(0x1f << 9); + val |= OMAP_DMA_PORT_EMIFF << 9; + c->plat->dma_write(val, CSDP, c->dma_ch); + } - if (d->dir == DMA_DEV_TO_MEM) - omap_set_dma_dest_params(c->dma_ch, OMAP_DMA_PORT_EMIFF, - OMAP_DMA_AMODE_POST_INC, sg->addr, 0, 0); - else - omap_set_dma_src_params(c->dma_ch, OMAP_DMA_PORT_EMIFF, - OMAP_DMA_AMODE_POST_INC, sg->addr, 0, 0); + val = c->plat->dma_read(CCR, c->dma_ch); + val &= ~(0x03 << 14); + val |= OMAP_DMA_AMODE_POST_INC << 14; + c->plat->dma_write(val, CCR, c->dma_ch); + + c->plat->dma_write(sg->addr, CDSA, c->dma_ch); + c->plat->dma_write(0, CDEI, c->dma_ch); + c->plat->dma_write(0, CDFI, c->dma_ch); + } else { + if (dma_omap1()) { + val = c->plat->dma_read(CSDP, c->dma_ch); + val &= ~(0x1f << 2); + 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); + val |= OMAP_DMA_AMODE_POST_INC << 12; + c->plat->dma_write(val, CCR, c->dma_ch); + + c->plat->dma_write(sg->addr, CSSA, c->dma_ch); + c->plat->dma_write(0, CSEI, c->dma_ch); + c->plat->dma_write(0, CSFI, 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); + + if (dma_omap1()) { + val = c->plat->dma_read(CCR, c->dma_ch); + val &= ~(1 << 5); + if (d->sync_mode == OMAP_DMA_SYNC_FRAME) + val |= 1 << 5; + c->plat->dma_write(val, CCR, c->dma_ch); + + val = c->plat->dma_read(CCR2, c->dma_ch); + val &= ~(1 << 2); + if (d->sync_mode == OMAP_DMA_SYNC_BLOCK) + val |= 1 << 2; + c->plat->dma_write(val, CCR2, c->dma_ch); + } + + if (dma_omap2plus() && c->dma_sig) { + val = c->plat->dma_read(CCR, c->dma_ch); + + /* DMA_SYNCHRO_CONTROL_UPPER depends on the channel number */ + val &= ~((1 << 23) | (3 << 19) | 0x1f); + val |= (c->dma_sig & ~0x1f) << 14; + val |= c->dma_sig & 0x1f; + + if (d->sync_mode & OMAP_DMA_SYNC_FRAME) + val |= 1 << 5; + else + val &= ~(1 << 5); - omap_set_dma_transfer_params(c->dma_ch, d->es, sg->en, sg->fn, - d->sync_mode, c->dma_sig, d->sync_type); + if (d->sync_mode & OMAP_DMA_SYNC_BLOCK) + val |= 1 << 18; + else + val &= ~(1 << 18); + + switch (d->sync_type) { + case OMAP_DMA_DST_SYNC_PREFETCH: + val &= ~(1 << 24); /* dest synch */ + val |= 1 << 23; /* Prefetch */ + break; + case 0: + val &= ~(1 << 24); /* dest synch */ + break; + default: + val |= 1 << 24; /* source synch */ + break; + } + c->plat->dma_write(val, CCR, c->dma_ch); + } + + c->plat->dma_write(sg->en, CEN, c->dma_ch); + c->plat->dma_write(sg->fn, CFN, c->dma_ch); omap_start_dma(c->dma_ch); } @@ -117,6 +197,7 @@ static void omap_dma_start_desc(struct omap_chan *c) { struct virt_dma_desc *vd = vchan_next_desc(&c->vc); struct omap_desc *d; + uint32_t val; if (!vd) { c->desc = NULL; @@ -128,12 +209,39 @@ static void omap_dma_start_desc(struct omap_chan *c) c->desc = d = to_omap_dma_desc(&vd->tx); c->sgidx = 0; - if (d->dir == DMA_DEV_TO_MEM) - omap_set_dma_src_params(c->dma_ch, d->periph_port, - OMAP_DMA_AMODE_CONSTANT, d->dev_addr, 0, d->fi); - else - omap_set_dma_dest_params(c->dma_ch, d->periph_port, - OMAP_DMA_AMODE_CONSTANT, d->dev_addr, 0, d->fi); + if (d->dir == DMA_DEV_TO_MEM) { + if (dma_omap1()) { + val = c->plat->dma_read(CSDP, c->dma_ch); + val &= ~(0x1f << 2); + 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 << 12); + val |= OMAP_DMA_AMODE_CONSTANT << 12; + c->plat->dma_write(val, CCR, c->dma_ch); + + c->plat->dma_write(d->dev_addr, CSSA, c->dma_ch); + 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); + val |= d->periph_port << 9; + c->plat->dma_write(val, CSDP, c->dma_ch); + } + + val = c->plat->dma_read(CCR, c->dma_ch); + val &= ~(0x03 << 14); + val |= OMAP_DMA_AMODE_CONSTANT << 14; + c->plat->dma_write(val, CCR, c->dma_ch); + + c->plat->dma_write(d->dev_addr, CDSA, c->dma_ch); + c->plat->dma_write(0, CDEI, c->dma_ch); + c->plat->dma_write(d->fi, CDFI, c->dma_ch); + } omap_dma_start_sg(c, d, 0); } @@ -452,8 +560,12 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic( } if (dma_omap2plus()) { - omap_set_dma_src_burst_mode(c->dma_ch, OMAP_DMA_DATA_BURST_16); - omap_set_dma_dest_burst_mode(c->dma_ch, OMAP_DMA_DATA_BURST_16); + 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); diff --git a/include/linux/omap-dma.h b/include/linux/omap-dma.h index 14742fc2aefe..d631658e2237 100644 --- a/include/linux/omap-dma.h +++ b/include/linux/omap-dma.h @@ -289,8 +289,10 @@ struct omap_system_dma_plat_info { #define dma_omap2plus() 0 #endif #define dma_omap1() (!dma_omap2plus()) -#define dma_omap15xx() ((dma_omap1() && (d->dev_caps & ENABLE_1510_MODE))) -#define dma_omap16xx() ((dma_omap1() && (d->dev_caps & ENABLE_16XX_MODE))) +#define __dma_omap15xx(d) (dma_omap1() && (d)->dev_caps & ENABLE_1510_MODE) +#define __dma_omap16xx(d) (dma_omap1() && (d)->dev_caps & ENABLE_16XX_MODE) +#define dma_omap15xx() __dma_omap15xx(d) +#define dma_omap16xx() __dma_omap16xx(d) extern struct omap_system_dma_plat_info *omap_get_plat_info(void); -- 1.7.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
