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authorRussell King <rmk+kernel@arm.linux.org.uk>2013-11-02 13:26:57 +0000
committerRussell King <rmk+kernel@arm.linux.org.uk>2014-04-04 00:27:43 +0100
commitb9e97822da374f52aaf99cb502f531ff2184b8f5 (patch)
treede5205a5f5b51cfdf268d9c774b9240d8bd8fbe9
parent1b416c4b41351c3eb8fc42dbb4cd8eba463c0813 (diff)
downloadlinux-linaro-stable-b9e97822da374f52aaf99cb502f531ff2184b8f5.tar.gz
dmaengine: omap-dma: program hardware directly
Program the transfer parameters directly into the hardware, rather than using the functions in arch/arm/plat-omap/dma.c. 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>
-rw-r--r--drivers/dma/omap-dma.c142
-rw-r--r--include/linux/omap-dma.h6
2 files changed, 130 insertions, 18 deletions
diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c
index 4ac26bf0ad30..47a3fa5bc38e 100644
--- a/drivers/dma/omap-dma.c
+++ b/drivers/dma/omap-dma.c
@@ -99,16 +99,94 @@ 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);
+ } else if (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);
+
+ 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);
+ }
- omap_set_dma_transfer_params(c->dma_ch, d->es, sg->en, sg->fn,
- d->sync_mode, c->dma_sig, d->sync_type);
+ 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 +195,7 @@ 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 +207,39 @@ 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 +558,12 @@ 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);