[PATCH 09/26] dmaengine: omap-dma: provide register definitions
Russell King
rmk+kernel at arm.linux.org.uk
Mon Feb 10 10:56:39 EST 2014
Provide our own set of more complete register definitions; this allows
us to get rid of the meaningless 1 << n constants scattered throughout
this code.
Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>
---
drivers/dma/omap-dma.c | 171 +++++++++++++++++++++++++++++++++----------------
1 file changed, 117 insertions(+), 54 deletions(-)
diff --git a/drivers/dma/omap-dma.c b/drivers/dma/omap-dma.c
index 9a9e81907475..6cf66e608338 100644
--- a/drivers/dma/omap-dma.c
+++ b/drivers/dma/omap-dma.c
@@ -57,7 +57,7 @@ struct omap_desc {
dma_addr_t dev_addr;
int16_t fi; /* for OMAP_DMA_SYNC_PACKET */
- uint8_t es; /* OMAP_DMA_DATA_TYPE_xxx */
+ uint8_t es; /* CSDP_DATA_TYPE_xxx */
uint32_t ccr; /* CCR value */
uint16_t cicr; /* CICR value */
uint32_t csdp; /* CSDP value */
@@ -66,10 +66,83 @@ struct omap_desc {
struct omap_sg sg[0];
};
+enum {
+ CCR_FS = BIT(5),
+ CCR_READ_PRIORITY = BIT(6),
+ CCR_ENABLE = BIT(7),
+ CCR_AUTO_INIT = BIT(8), /* OMAP1 only */
+ CCR_REPEAT = BIT(9), /* OMAP1 only */
+ CCR_OMAP31_DISABLE = BIT(10), /* OMAP1 only */
+ CCR_SUSPEND_SENSITIVE = BIT(8), /* OMAP2+ only */
+ CCR_RD_ACTIVE = BIT(9), /* OMAP2+ only */
+ CCR_WR_ACTIVE = BIT(10), /* OMAP2+ only */
+ CCR_SRC_AMODE_CONSTANT = 0 << 12,
+ CCR_SRC_AMODE_POSTINC = 1 << 12,
+ CCR_SRC_AMODE_SGLIDX = 2 << 12,
+ CCR_SRC_AMODE_DBLIDX = 3 << 12,
+ CCR_DST_AMODE_CONSTANT = 0 << 14,
+ CCR_DST_AMODE_POSTINC = 1 << 14,
+ CCR_DST_AMODE_SGLIDX = 2 << 14,
+ CCR_DST_AMODE_DBLIDX = 3 << 14,
+ CCR_CONSTANT_FILL = BIT(16),
+ CCR_TRANSPARENT_COPY = BIT(17),
+ CCR_BS = BIT(18),
+ CCR_SUPERVISOR = BIT(22),
+ CCR_PREFETCH = BIT(23),
+ CCR_TRIGGER_SRC = BIT(24),
+ CCR_BUFFERING_DISABLE = BIT(25),
+ CCR_WRITE_PRIORITY = BIT(26),
+ CCR_SYNC_ELEMENT = 0,
+ CCR_SYNC_FRAME = CCR_FS,
+ CCR_SYNC_BLOCK = CCR_BS,
+ CCR_SYNC_PACKET = CCR_BS | CCR_FS,
+
+ CSDP_DATA_TYPE_8 = 0,
+ CSDP_DATA_TYPE_16 = 1,
+ CSDP_DATA_TYPE_32 = 2,
+ CSDP_SRC_PORT_EMIFF = 0 << 2, /* OMAP1 only */
+ CSDP_SRC_PORT_EMIFS = 1 << 2, /* OMAP1 only */
+ CSDP_SRC_PORT_OCP_T1 = 2 << 2, /* OMAP1 only */
+ CSDP_SRC_PORT_TIPB = 3 << 2, /* OMAP1 only */
+ CSDP_SRC_PORT_OCP_T2 = 4 << 2, /* OMAP1 only */
+ CSDP_SRC_PORT_MPUI = 5 << 2, /* OMAP1 only */
+ CSDP_SRC_PACKED = BIT(6),
+ CSDP_SRC_BURST_1 = 0 << 7,
+ CSDP_SRC_BURST_16 = 1 << 7,
+ CSDP_SRC_BURST_32 = 2 << 7,
+ CSDP_SRC_BURST_64 = 3 << 7,
+ CSDP_DST_PORT_EMIFF = 0 << 9, /* OMAP1 only */
+ CSDP_DST_PORT_EMIFS = 1 << 9, /* OMAP1 only */
+ CSDP_DST_PORT_OCP_T1 = 2 << 9, /* OMAP1 only */
+ CSDP_DST_PORT_TIPB = 3 << 9, /* OMAP1 only */
+ CSDP_DST_PORT_OCP_T2 = 4 << 9, /* OMAP1 only */
+ CSDP_DST_PORT_MPUI = 5 << 9, /* OMAP1 only */
+ CSDP_DST_PACKED = BIT(13),
+ CSDP_DST_BURST_1 = 0 << 14,
+ CSDP_DST_BURST_16 = 1 << 14,
+ CSDP_DST_BURST_32 = 2 << 14,
+ CSDP_DST_BURST_64 = 3 << 14,
+
+ CICR_TOUT_IE = BIT(0), /* OMAP1 only */
+ CICR_DROP_IE = BIT(1),
+ CICR_HALF_IE = BIT(2),
+ CICR_FRAME_IE = BIT(3),
+ CICR_LAST_IE = BIT(4),
+ CICR_BLOCK_IE = BIT(5),
+ CICR_PKT_IE = BIT(7), /* OMAP2+ only */
+ CICR_TRANS_ERR_IE = BIT(8), /* OMAP2+ only */
+ CICR_SUPERVISOR_ERR_IE = BIT(10), /* OMAP2+ only */
+ CICR_MISALIGNED_ERR_IE = BIT(11), /* OMAP2+ only */
+ CICR_DRAIN_IE = BIT(12), /* OMAP2+ only */
+ CICR_SUPER_BLOCK_IE = BIT(14), /* OMAP2+ only */
+
+ CLNK_CTRL_ENABLE_LNK = BIT(15),
+};
+
static const unsigned es_bytes[] = {
- [OMAP_DMA_DATA_TYPE_S8] = 1,
- [OMAP_DMA_DATA_TYPE_S16] = 2,
- [OMAP_DMA_DATA_TYPE_S32] = 4,
+ [CSDP_DATA_TYPE_8] = 1,
+ [CSDP_DATA_TYPE_16] = 2,
+ [CSDP_DATA_TYPE_32] = 4,
};
static struct of_dma_filter_info omap_dma_info = {
@@ -112,7 +185,7 @@ static void omap_dma_start(struct omap_chan *c, struct omap_desc *d)
if (dma_omap1())
val &= ~(1 << 14);
- val |= c->dma_ch | 1 << 15;
+ val |= c->dma_ch | CLNK_CTRL_ENABLE_LNK;
c->plat->dma_write(val, CLNK_CTRL, c->dma_ch);
} else if (od->plat->errata & DMA_ERRATA_PARALLEL_CHANNELS)
@@ -129,8 +202,8 @@ static void omap_dma_start(struct omap_chan *c, struct omap_desc *d)
val = c->plat->dma_read(CCR, c->dma_ch);
if (od->plat->errata & DMA_ERRATA_IFRAME_BUFFERING)
- val |= OMAP_DMA_CCR_BUFFERING_DISABLE;
- val |= OMAP_DMA_CCR_EN;
+ val |= CCR_BUFFERING_DISABLE;
+ val |= CCR_ENABLE;
mb();
c->plat->dma_write(val, CCR, c->dma_ch);
}
@@ -150,8 +223,7 @@ static void omap_dma_stop(struct omap_chan *c)
c->plat->dma_write(~0, CSR, c->dma_ch);
val = c->plat->dma_read(CCR, c->dma_ch);
- if (od->plat->errata & DMA_ERRATA_i541 &&
- val & OMAP_DMA_CCR_SEL_SRC_DST_SYNC) {
+ if (od->plat->errata & DMA_ERRATA_i541 && val & CCR_TRIGGER_SRC) {
uint32_t sysconfig;
unsigned i;
@@ -161,13 +233,13 @@ static void omap_dma_stop(struct omap_chan *c)
c->plat->dma_write(val, OCP_SYSCONFIG, c->dma_ch);
val = c->plat->dma_read(CCR, c->dma_ch);
- val &= ~OMAP_DMA_CCR_EN;
+ val &= ~CCR_ENABLE;
c->plat->dma_write(val, CCR, c->dma_ch);
/* Wait for sDMA FIFO to drain */
for (i = 0; ; i++) {
val = c->plat->dma_read(CCR, c->dma_ch);
- if (!(val & (OMAP_DMA_CCR_RD_ACTIVE | OMAP_DMA_CCR_WR_ACTIVE)))
+ if (!(val & (CCR_RD_ACTIVE | CCR_WR_ACTIVE)))
break;
if (i > 100)
@@ -176,14 +248,14 @@ static void omap_dma_stop(struct omap_chan *c)
udelay(5);
}
- if (val & (OMAP_DMA_CCR_RD_ACTIVE | OMAP_DMA_CCR_WR_ACTIVE))
+ if (val & (CCR_RD_ACTIVE | CCR_WR_ACTIVE))
dev_err(c->vc.chan.device->dev,
"DMA drain did not complete on lch %d\n",
c->dma_ch);
c->plat->dma_write(sysconfig, OCP_SYSCONFIG, c->dma_ch);
} else {
- val &= ~OMAP_DMA_CCR_EN;
+ val &= ~CCR_ENABLE;
c->plat->dma_write(val, CCR, c->dma_ch);
}
@@ -195,7 +267,7 @@ static void omap_dma_stop(struct omap_chan *c)
if (dma_omap1())
val |= 1 << 14; /* set the STOP_LNK bit */
else
- val &= ~(1 << 15); /* Clear the ENABLE_LNK bit */
+ val &= ~CLNK_CTRL_ENABLE_LNK;
c->plat->dma_write(val, CLNK_CTRL, c->dma_ch);
}
@@ -510,13 +582,13 @@ static struct dma_async_tx_descriptor *omap_dma_prep_slave_sg(
/* Bus width translates to the element size (ES) */
switch (dev_width) {
case DMA_SLAVE_BUSWIDTH_1_BYTE:
- es = OMAP_DMA_DATA_TYPE_S8;
+ es = CSDP_DATA_TYPE_8;
break;
case DMA_SLAVE_BUSWIDTH_2_BYTES:
- es = OMAP_DMA_DATA_TYPE_S16;
+ es = CSDP_DATA_TYPE_16;
break;
case DMA_SLAVE_BUSWIDTH_4_BYTES:
- es = OMAP_DMA_DATA_TYPE_S32;
+ es = CSDP_DATA_TYPE_32;
break;
default: /* not reached */
return NULL;
@@ -531,44 +603,38 @@ static struct dma_async_tx_descriptor *omap_dma_prep_slave_sg(
d->dev_addr = dev_addr;
d->es = es;
- d->ccr = 0;
+ d->ccr = CCR_SYNC_FRAME;
if (dir == DMA_DEV_TO_MEM)
- d->ccr |= OMAP_DMA_AMODE_POST_INC << 14 |
- OMAP_DMA_AMODE_CONSTANT << 12;
+ d->ccr |= CCR_DST_AMODE_POSTINC | CCR_SRC_AMODE_CONSTANT;
else
- d->ccr |= OMAP_DMA_AMODE_CONSTANT << 14 |
- OMAP_DMA_AMODE_POST_INC << 12;
+ d->ccr |= CCR_DST_AMODE_CONSTANT | CCR_SRC_AMODE_POSTINC;
- d->cicr = OMAP_DMA_DROP_IRQ | OMAP_DMA_BLOCK_IRQ;
+ d->cicr = CICR_DROP_IE | CICR_BLOCK_IE;
d->csdp = es;
if (dma_omap1()) {
- d->ccr |= 1 << 5; /* frame sync */
if (__dma_omap16xx(od->plat->dma_attr)) {
- d->ccr |= 1 << 10; /* disable 3.0/3.1 compatibility mode */
+ 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 |= OMAP1_DMA_TOUT_IRQ;
+ d->cicr |= CICR_TOUT_IE;
if (dir == DMA_DEV_TO_MEM)
- d->csdp |= OMAP_DMA_PORT_EMIFF << 9 |
- OMAP_DMA_PORT_TIPB << 2;
+ d->csdp |= CSDP_DST_PORT_EMIFF | CSDP_SRC_PORT_TIPB;
else
- d->csdp |= OMAP_DMA_PORT_TIPB << 9 |
- OMAP_DMA_PORT_EMIFF << 2;
+ d->csdp |= CSDP_DST_PORT_TIPB | CSDP_SRC_PORT_EMIFF;
} else {
d->ccr |= (c->dma_sig & ~0x1f) << 14;
d->ccr |= c->dma_sig & 0x1f;
- d->ccr |= 1 << 5; /* frame sync */
if (dir == DMA_DEV_TO_MEM)
- d->ccr |= 1 << 24; /* source synch */
+ d->ccr |= CCR_TRIGGER_SRC;
- d->cicr |= OMAP2_DMA_MISALIGNED_ERR_IRQ | OMAP2_DMA_TRANS_ERR_IRQ;
+ d->cicr |= CICR_MISALIGNED_ERR_IE | CICR_TRANS_ERR_IE;
}
/*
@@ -623,13 +689,13 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic(
/* Bus width translates to the element size (ES) */
switch (dev_width) {
case DMA_SLAVE_BUSWIDTH_1_BYTE:
- es = OMAP_DMA_DATA_TYPE_S8;
+ es = CSDP_DATA_TYPE_8;
break;
case DMA_SLAVE_BUSWIDTH_2_BYTES:
- es = OMAP_DMA_DATA_TYPE_S16;
+ es = CSDP_DATA_TYPE_16;
break;
case DMA_SLAVE_BUSWIDTH_4_BYTES:
- es = OMAP_DMA_DATA_TYPE_S32;
+ es = CSDP_DATA_TYPE_32;
break;
default: /* not reached */
return NULL;
@@ -651,51 +717,48 @@ static struct dma_async_tx_descriptor *omap_dma_prep_dma_cyclic(
d->ccr = 0;
if (__dma_omap15xx(od->plat->dma_attr))
- d->ccr = 3 << 8;
+ d->ccr = CCR_AUTO_INIT | CCR_REPEAT;
if (dir == DMA_DEV_TO_MEM)
- d->ccr |= OMAP_DMA_AMODE_POST_INC << 14 |
- OMAP_DMA_AMODE_CONSTANT << 12;
+ d->ccr |= CCR_DST_AMODE_POSTINC | CCR_SRC_AMODE_CONSTANT;
else
- d->ccr |= OMAP_DMA_AMODE_CONSTANT << 14 |
- OMAP_DMA_AMODE_POST_INC << 12;
+ d->ccr |= CCR_DST_AMODE_CONSTANT | CCR_SRC_AMODE_POSTINC;
- d->cicr = OMAP_DMA_DROP_IRQ;
+ d->cicr = CICR_DROP_IE;
if (flags & DMA_PREP_INTERRUPT)
- d->cicr |= OMAP_DMA_FRAME_IRQ;
+ d->cicr |= CICR_FRAME_IE;
d->csdp = es;
if (dma_omap1()) {
if (__dma_omap16xx(od->plat->dma_attr)) {
- d->ccr |= 1 << 10; /* disable 3.0/3.1 compatibility mode */
+ 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 |= OMAP1_DMA_TOUT_IRQ;
+ d->cicr |= CICR_TOUT_IE;
if (dir == DMA_DEV_TO_MEM)
- d->csdp |= OMAP_DMA_PORT_EMIFF << 9 |
- OMAP_DMA_PORT_MPUI << 2;
+ d->csdp |= CSDP_DST_PORT_EMIFF | CSDP_SRC_PORT_MPUI;
else
- d->csdp |= OMAP_DMA_PORT_MPUI << 9 |
- OMAP_DMA_PORT_EMIFF << 2;
+ 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 |= 1 << 18 | 1 << 5; /* packet */
+ d->ccr |= CCR_SYNC_PACKET;
+ else
+ d->ccr |= CCR_SYNC_ELEMENT;
if (dir == DMA_DEV_TO_MEM)
- d->ccr |= 1 << 24; /* source synch */
+ d->ccr |= CCR_TRIGGER_SRC;
- d->cicr |= OMAP2_DMA_MISALIGNED_ERR_IRQ | OMAP2_DMA_TRANS_ERR_IRQ;
+ d->cicr |= CICR_MISALIGNED_ERR_IE | CICR_TRANS_ERR_IE;
- /* src and dst burst mode 16 */
- d->csdp |= 3 << 14 | 3 << 7;
+ d->csdp |= CSDP_DST_BURST_64 | CSDP_SRC_BURST_64;
}
c->cyclic = true;
--
1.8.3.1
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