Merge branch 'topic/sprd' into for-linus
This commit is contained in:
commit
990beed934
|
@ -36,6 +36,8 @@
|
||||||
#define SPRD_DMA_GLB_CHN_EN_STS 0x1c
|
#define SPRD_DMA_GLB_CHN_EN_STS 0x1c
|
||||||
#define SPRD_DMA_GLB_DEBUG_STS 0x20
|
#define SPRD_DMA_GLB_DEBUG_STS 0x20
|
||||||
#define SPRD_DMA_GLB_ARB_SEL_STS 0x24
|
#define SPRD_DMA_GLB_ARB_SEL_STS 0x24
|
||||||
|
#define SPRD_DMA_GLB_2STAGE_GRP1 0x28
|
||||||
|
#define SPRD_DMA_GLB_2STAGE_GRP2 0x2c
|
||||||
#define SPRD_DMA_GLB_REQ_UID(uid) (0x4 * ((uid) - 1))
|
#define SPRD_DMA_GLB_REQ_UID(uid) (0x4 * ((uid) - 1))
|
||||||
#define SPRD_DMA_GLB_REQ_UID_OFFSET 0x2000
|
#define SPRD_DMA_GLB_REQ_UID_OFFSET 0x2000
|
||||||
|
|
||||||
|
@ -57,6 +59,18 @@
|
||||||
#define SPRD_DMA_CHN_SRC_BLK_STEP 0x38
|
#define SPRD_DMA_CHN_SRC_BLK_STEP 0x38
|
||||||
#define SPRD_DMA_CHN_DES_BLK_STEP 0x3c
|
#define SPRD_DMA_CHN_DES_BLK_STEP 0x3c
|
||||||
|
|
||||||
|
/* SPRD_DMA_GLB_2STAGE_GRP register definition */
|
||||||
|
#define SPRD_DMA_GLB_2STAGE_EN BIT(24)
|
||||||
|
#define SPRD_DMA_GLB_CHN_INT_MASK GENMASK(23, 20)
|
||||||
|
#define SPRD_DMA_GLB_LIST_DONE_TRG BIT(19)
|
||||||
|
#define SPRD_DMA_GLB_TRANS_DONE_TRG BIT(18)
|
||||||
|
#define SPRD_DMA_GLB_BLOCK_DONE_TRG BIT(17)
|
||||||
|
#define SPRD_DMA_GLB_FRAG_DONE_TRG BIT(16)
|
||||||
|
#define SPRD_DMA_GLB_TRG_OFFSET 16
|
||||||
|
#define SPRD_DMA_GLB_DEST_CHN_MASK GENMASK(13, 8)
|
||||||
|
#define SPRD_DMA_GLB_DEST_CHN_OFFSET 8
|
||||||
|
#define SPRD_DMA_GLB_SRC_CHN_MASK GENMASK(5, 0)
|
||||||
|
|
||||||
/* SPRD_DMA_CHN_INTC register definition */
|
/* SPRD_DMA_CHN_INTC register definition */
|
||||||
#define SPRD_DMA_INT_MASK GENMASK(4, 0)
|
#define SPRD_DMA_INT_MASK GENMASK(4, 0)
|
||||||
#define SPRD_DMA_INT_CLR_OFFSET 24
|
#define SPRD_DMA_INT_CLR_OFFSET 24
|
||||||
|
@ -118,6 +132,10 @@
|
||||||
#define SPRD_DMA_SRC_TRSF_STEP_OFFSET 0
|
#define SPRD_DMA_SRC_TRSF_STEP_OFFSET 0
|
||||||
#define SPRD_DMA_TRSF_STEP_MASK GENMASK(15, 0)
|
#define SPRD_DMA_TRSF_STEP_MASK GENMASK(15, 0)
|
||||||
|
|
||||||
|
/* define DMA channel mode & trigger mode mask */
|
||||||
|
#define SPRD_DMA_CHN_MODE_MASK GENMASK(7, 0)
|
||||||
|
#define SPRD_DMA_TRG_MODE_MASK GENMASK(7, 0)
|
||||||
|
|
||||||
/* define the DMA transfer step type */
|
/* define the DMA transfer step type */
|
||||||
#define SPRD_DMA_NONE_STEP 0
|
#define SPRD_DMA_NONE_STEP 0
|
||||||
#define SPRD_DMA_BYTE_STEP 1
|
#define SPRD_DMA_BYTE_STEP 1
|
||||||
|
@ -159,6 +177,7 @@ struct sprd_dma_chn_hw {
|
||||||
struct sprd_dma_desc {
|
struct sprd_dma_desc {
|
||||||
struct virt_dma_desc vd;
|
struct virt_dma_desc vd;
|
||||||
struct sprd_dma_chn_hw chn_hw;
|
struct sprd_dma_chn_hw chn_hw;
|
||||||
|
enum dma_transfer_direction dir;
|
||||||
};
|
};
|
||||||
|
|
||||||
/* dma channel description */
|
/* dma channel description */
|
||||||
|
@ -169,6 +188,8 @@ struct sprd_dma_chn {
|
||||||
struct dma_slave_config slave_cfg;
|
struct dma_slave_config slave_cfg;
|
||||||
u32 chn_num;
|
u32 chn_num;
|
||||||
u32 dev_id;
|
u32 dev_id;
|
||||||
|
enum sprd_dma_chn_mode chn_mode;
|
||||||
|
enum sprd_dma_trg_mode trg_mode;
|
||||||
struct sprd_dma_desc *cur_desc;
|
struct sprd_dma_desc *cur_desc;
|
||||||
};
|
};
|
||||||
|
|
||||||
|
@ -205,6 +226,16 @@ static inline struct sprd_dma_desc *to_sprd_dma_desc(struct virt_dma_desc *vd)
|
||||||
return container_of(vd, struct sprd_dma_desc, vd);
|
return container_of(vd, struct sprd_dma_desc, vd);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static void sprd_dma_glb_update(struct sprd_dma_dev *sdev, u32 reg,
|
||||||
|
u32 mask, u32 val)
|
||||||
|
{
|
||||||
|
u32 orig = readl(sdev->glb_base + reg);
|
||||||
|
u32 tmp;
|
||||||
|
|
||||||
|
tmp = (orig & ~mask) | val;
|
||||||
|
writel(tmp, sdev->glb_base + reg);
|
||||||
|
}
|
||||||
|
|
||||||
static void sprd_dma_chn_update(struct sprd_dma_chn *schan, u32 reg,
|
static void sprd_dma_chn_update(struct sprd_dma_chn *schan, u32 reg,
|
||||||
u32 mask, u32 val)
|
u32 mask, u32 val)
|
||||||
{
|
{
|
||||||
|
@ -331,6 +362,17 @@ static void sprd_dma_stop_and_disable(struct sprd_dma_chn *schan)
|
||||||
sprd_dma_disable_chn(schan);
|
sprd_dma_disable_chn(schan);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static unsigned long sprd_dma_get_src_addr(struct sprd_dma_chn *schan)
|
||||||
|
{
|
||||||
|
unsigned long addr, addr_high;
|
||||||
|
|
||||||
|
addr = readl(schan->chn_base + SPRD_DMA_CHN_SRC_ADDR);
|
||||||
|
addr_high = readl(schan->chn_base + SPRD_DMA_CHN_WARP_PTR) &
|
||||||
|
SPRD_DMA_HIGH_ADDR_MASK;
|
||||||
|
|
||||||
|
return addr | (addr_high << SPRD_DMA_HIGH_ADDR_OFFSET);
|
||||||
|
}
|
||||||
|
|
||||||
static unsigned long sprd_dma_get_dst_addr(struct sprd_dma_chn *schan)
|
static unsigned long sprd_dma_get_dst_addr(struct sprd_dma_chn *schan)
|
||||||
{
|
{
|
||||||
unsigned long addr, addr_high;
|
unsigned long addr, addr_high;
|
||||||
|
@ -377,6 +419,49 @@ static enum sprd_dma_req_mode sprd_dma_get_req_type(struct sprd_dma_chn *schan)
|
||||||
return (frag_reg >> SPRD_DMA_REQ_MODE_OFFSET) & SPRD_DMA_REQ_MODE_MASK;
|
return (frag_reg >> SPRD_DMA_REQ_MODE_OFFSET) & SPRD_DMA_REQ_MODE_MASK;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static int sprd_dma_set_2stage_config(struct sprd_dma_chn *schan)
|
||||||
|
{
|
||||||
|
struct sprd_dma_dev *sdev = to_sprd_dma_dev(&schan->vc.chan);
|
||||||
|
u32 val, chn = schan->chn_num + 1;
|
||||||
|
|
||||||
|
switch (schan->chn_mode) {
|
||||||
|
case SPRD_DMA_SRC_CHN0:
|
||||||
|
val = chn & SPRD_DMA_GLB_SRC_CHN_MASK;
|
||||||
|
val |= BIT(schan->trg_mode - 1) << SPRD_DMA_GLB_TRG_OFFSET;
|
||||||
|
val |= SPRD_DMA_GLB_2STAGE_EN;
|
||||||
|
sprd_dma_glb_update(sdev, SPRD_DMA_GLB_2STAGE_GRP1, val, val);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case SPRD_DMA_SRC_CHN1:
|
||||||
|
val = chn & SPRD_DMA_GLB_SRC_CHN_MASK;
|
||||||
|
val |= BIT(schan->trg_mode - 1) << SPRD_DMA_GLB_TRG_OFFSET;
|
||||||
|
val |= SPRD_DMA_GLB_2STAGE_EN;
|
||||||
|
sprd_dma_glb_update(sdev, SPRD_DMA_GLB_2STAGE_GRP2, val, val);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case SPRD_DMA_DST_CHN0:
|
||||||
|
val = (chn << SPRD_DMA_GLB_DEST_CHN_OFFSET) &
|
||||||
|
SPRD_DMA_GLB_DEST_CHN_MASK;
|
||||||
|
val |= SPRD_DMA_GLB_2STAGE_EN;
|
||||||
|
sprd_dma_glb_update(sdev, SPRD_DMA_GLB_2STAGE_GRP1, val, val);
|
||||||
|
break;
|
||||||
|
|
||||||
|
case SPRD_DMA_DST_CHN1:
|
||||||
|
val = (chn << SPRD_DMA_GLB_DEST_CHN_OFFSET) &
|
||||||
|
SPRD_DMA_GLB_DEST_CHN_MASK;
|
||||||
|
val |= SPRD_DMA_GLB_2STAGE_EN;
|
||||||
|
sprd_dma_glb_update(sdev, SPRD_DMA_GLB_2STAGE_GRP2, val, val);
|
||||||
|
break;
|
||||||
|
|
||||||
|
default:
|
||||||
|
dev_err(sdev->dma_dev.dev, "invalid channel mode setting %d\n",
|
||||||
|
schan->chn_mode);
|
||||||
|
return -EINVAL;
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
static void sprd_dma_set_chn_config(struct sprd_dma_chn *schan,
|
static void sprd_dma_set_chn_config(struct sprd_dma_chn *schan,
|
||||||
struct sprd_dma_desc *sdesc)
|
struct sprd_dma_desc *sdesc)
|
||||||
{
|
{
|
||||||
|
@ -410,6 +495,13 @@ static void sprd_dma_start(struct sprd_dma_chn *schan)
|
||||||
list_del(&vd->node);
|
list_del(&vd->node);
|
||||||
schan->cur_desc = to_sprd_dma_desc(vd);
|
schan->cur_desc = to_sprd_dma_desc(vd);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Set 2-stage configuration if the channel starts one 2-stage
|
||||||
|
* transfer.
|
||||||
|
*/
|
||||||
|
if (schan->chn_mode && sprd_dma_set_2stage_config(schan))
|
||||||
|
return;
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Copy the DMA configuration from DMA descriptor to this hardware
|
* Copy the DMA configuration from DMA descriptor to this hardware
|
||||||
* channel.
|
* channel.
|
||||||
|
@ -427,6 +519,7 @@ static void sprd_dma_stop(struct sprd_dma_chn *schan)
|
||||||
sprd_dma_stop_and_disable(schan);
|
sprd_dma_stop_and_disable(schan);
|
||||||
sprd_dma_unset_uid(schan);
|
sprd_dma_unset_uid(schan);
|
||||||
sprd_dma_clear_int(schan);
|
sprd_dma_clear_int(schan);
|
||||||
|
schan->cur_desc = NULL;
|
||||||
}
|
}
|
||||||
|
|
||||||
static bool sprd_dma_check_trans_done(struct sprd_dma_desc *sdesc,
|
static bool sprd_dma_check_trans_done(struct sprd_dma_desc *sdesc,
|
||||||
|
@ -450,7 +543,7 @@ static irqreturn_t dma_irq_handle(int irq, void *dev_id)
|
||||||
struct sprd_dma_desc *sdesc;
|
struct sprd_dma_desc *sdesc;
|
||||||
enum sprd_dma_req_mode req_type;
|
enum sprd_dma_req_mode req_type;
|
||||||
enum sprd_dma_int_type int_type;
|
enum sprd_dma_int_type int_type;
|
||||||
bool trans_done = false;
|
bool trans_done = false, cyclic = false;
|
||||||
u32 i;
|
u32 i;
|
||||||
|
|
||||||
while (irq_status) {
|
while (irq_status) {
|
||||||
|
@ -465,13 +558,19 @@ static irqreturn_t dma_irq_handle(int irq, void *dev_id)
|
||||||
|
|
||||||
sdesc = schan->cur_desc;
|
sdesc = schan->cur_desc;
|
||||||
|
|
||||||
/* Check if the dma request descriptor is done. */
|
/* cyclic mode schedule callback */
|
||||||
trans_done = sprd_dma_check_trans_done(sdesc, int_type,
|
cyclic = schan->linklist.phy_addr ? true : false;
|
||||||
req_type);
|
if (cyclic == true) {
|
||||||
if (trans_done == true) {
|
vchan_cyclic_callback(&sdesc->vd);
|
||||||
vchan_cookie_complete(&sdesc->vd);
|
} else {
|
||||||
schan->cur_desc = NULL;
|
/* Check if the dma request descriptor is done. */
|
||||||
sprd_dma_start(schan);
|
trans_done = sprd_dma_check_trans_done(sdesc, int_type,
|
||||||
|
req_type);
|
||||||
|
if (trans_done == true) {
|
||||||
|
vchan_cookie_complete(&sdesc->vd);
|
||||||
|
schan->cur_desc = NULL;
|
||||||
|
sprd_dma_start(schan);
|
||||||
|
}
|
||||||
}
|
}
|
||||||
spin_unlock(&schan->vc.lock);
|
spin_unlock(&schan->vc.lock);
|
||||||
}
|
}
|
||||||
|
@ -534,7 +633,12 @@ static enum dma_status sprd_dma_tx_status(struct dma_chan *chan,
|
||||||
else
|
else
|
||||||
pos = 0;
|
pos = 0;
|
||||||
} else if (schan->cur_desc && schan->cur_desc->vd.tx.cookie == cookie) {
|
} else if (schan->cur_desc && schan->cur_desc->vd.tx.cookie == cookie) {
|
||||||
pos = sprd_dma_get_dst_addr(schan);
|
struct sprd_dma_desc *sdesc = to_sprd_dma_desc(vd);
|
||||||
|
|
||||||
|
if (sdesc->dir == DMA_DEV_TO_MEM)
|
||||||
|
pos = sprd_dma_get_dst_addr(schan);
|
||||||
|
else
|
||||||
|
pos = sprd_dma_get_src_addr(schan);
|
||||||
} else {
|
} else {
|
||||||
pos = 0;
|
pos = 0;
|
||||||
}
|
}
|
||||||
|
@ -593,6 +697,7 @@ static int sprd_dma_fill_desc(struct dma_chan *chan,
|
||||||
{
|
{
|
||||||
struct sprd_dma_dev *sdev = to_sprd_dma_dev(chan);
|
struct sprd_dma_dev *sdev = to_sprd_dma_dev(chan);
|
||||||
struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
|
struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
|
||||||
|
enum sprd_dma_chn_mode chn_mode = schan->chn_mode;
|
||||||
u32 req_mode = (flags >> SPRD_DMA_REQ_SHIFT) & SPRD_DMA_REQ_MODE_MASK;
|
u32 req_mode = (flags >> SPRD_DMA_REQ_SHIFT) & SPRD_DMA_REQ_MODE_MASK;
|
||||||
u32 int_mode = flags & SPRD_DMA_INT_MASK;
|
u32 int_mode = flags & SPRD_DMA_INT_MASK;
|
||||||
int src_datawidth, dst_datawidth, src_step, dst_step;
|
int src_datawidth, dst_datawidth, src_step, dst_step;
|
||||||
|
@ -604,7 +709,16 @@ static int sprd_dma_fill_desc(struct dma_chan *chan,
|
||||||
dev_err(sdev->dma_dev.dev, "invalid source step\n");
|
dev_err(sdev->dma_dev.dev, "invalid source step\n");
|
||||||
return src_step;
|
return src_step;
|
||||||
}
|
}
|
||||||
dst_step = SPRD_DMA_NONE_STEP;
|
|
||||||
|
/*
|
||||||
|
* For 2-stage transfer, destination channel step can not be 0,
|
||||||
|
* since destination device is AON IRAM.
|
||||||
|
*/
|
||||||
|
if (chn_mode == SPRD_DMA_DST_CHN0 ||
|
||||||
|
chn_mode == SPRD_DMA_DST_CHN1)
|
||||||
|
dst_step = src_step;
|
||||||
|
else
|
||||||
|
dst_step = SPRD_DMA_NONE_STEP;
|
||||||
} else {
|
} else {
|
||||||
dst_step = sprd_dma_get_step(slave_cfg->dst_addr_width);
|
dst_step = sprd_dma_get_step(slave_cfg->dst_addr_width);
|
||||||
if (dst_step < 0) {
|
if (dst_step < 0) {
|
||||||
|
@ -674,13 +788,11 @@ static int sprd_dma_fill_desc(struct dma_chan *chan,
|
||||||
|
|
||||||
/* link-list configuration */
|
/* link-list configuration */
|
||||||
if (schan->linklist.phy_addr) {
|
if (schan->linklist.phy_addr) {
|
||||||
if (sg_index == sglen - 1)
|
|
||||||
hw->frg_len |= SPRD_DMA_LLIST_END;
|
|
||||||
|
|
||||||
hw->cfg |= SPRD_DMA_LINKLIST_EN;
|
hw->cfg |= SPRD_DMA_LINKLIST_EN;
|
||||||
|
|
||||||
/* link-list index */
|
/* link-list index */
|
||||||
temp = (sg_index + 1) % sglen;
|
temp = sglen ? (sg_index + 1) % sglen : 0;
|
||||||
|
|
||||||
/* Next link-list configuration's physical address offset */
|
/* Next link-list configuration's physical address offset */
|
||||||
temp = temp * sizeof(*hw) + SPRD_DMA_CHN_SRC_ADDR;
|
temp = temp * sizeof(*hw) + SPRD_DMA_CHN_SRC_ADDR;
|
||||||
/*
|
/*
|
||||||
|
@ -804,6 +916,8 @@ sprd_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
|
||||||
if (!sdesc)
|
if (!sdesc)
|
||||||
return NULL;
|
return NULL;
|
||||||
|
|
||||||
|
sdesc->dir = dir;
|
||||||
|
|
||||||
for_each_sg(sgl, sg, sglen, i) {
|
for_each_sg(sgl, sg, sglen, i) {
|
||||||
len = sg_dma_len(sg);
|
len = sg_dma_len(sg);
|
||||||
|
|
||||||
|
@ -831,6 +945,12 @@ sprd_dma_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl,
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/* Set channel mode and trigger mode for 2-stage transfer */
|
||||||
|
schan->chn_mode =
|
||||||
|
(flags >> SPRD_DMA_CHN_MODE_SHIFT) & SPRD_DMA_CHN_MODE_MASK;
|
||||||
|
schan->trg_mode =
|
||||||
|
(flags >> SPRD_DMA_TRG_MODE_SHIFT) & SPRD_DMA_TRG_MODE_MASK;
|
||||||
|
|
||||||
ret = sprd_dma_fill_desc(chan, &sdesc->chn_hw, 0, 0, src, dst, len,
|
ret = sprd_dma_fill_desc(chan, &sdesc->chn_hw, 0, 0, src, dst, len,
|
||||||
dir, flags, slave_cfg);
|
dir, flags, slave_cfg);
|
||||||
if (ret) {
|
if (ret) {
|
||||||
|
@ -847,9 +967,6 @@ static int sprd_dma_slave_config(struct dma_chan *chan,
|
||||||
struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
|
struct sprd_dma_chn *schan = to_sprd_dma_chan(chan);
|
||||||
struct dma_slave_config *slave_cfg = &schan->slave_cfg;
|
struct dma_slave_config *slave_cfg = &schan->slave_cfg;
|
||||||
|
|
||||||
if (!is_slave_direction(config->direction))
|
|
||||||
return -EINVAL;
|
|
||||||
|
|
||||||
memcpy(slave_cfg, config, sizeof(*config));
|
memcpy(slave_cfg, config, sizeof(*config));
|
||||||
return 0;
|
return 0;
|
||||||
}
|
}
|
||||||
|
@ -1109,4 +1226,5 @@ module_platform_driver(sprd_dma_driver);
|
||||||
MODULE_LICENSE("GPL v2");
|
MODULE_LICENSE("GPL v2");
|
||||||
MODULE_DESCRIPTION("DMA driver for Spreadtrum");
|
MODULE_DESCRIPTION("DMA driver for Spreadtrum");
|
||||||
MODULE_AUTHOR("Baolin Wang <baolin.wang@spreadtrum.com>");
|
MODULE_AUTHOR("Baolin Wang <baolin.wang@spreadtrum.com>");
|
||||||
|
MODULE_AUTHOR("Eric Long <eric.long@spreadtrum.com>");
|
||||||
MODULE_ALIAS("platform:sprd-dma");
|
MODULE_ALIAS("platform:sprd-dma");
|
||||||
|
|
|
@ -3,9 +3,65 @@
|
||||||
#ifndef _SPRD_DMA_H_
|
#ifndef _SPRD_DMA_H_
|
||||||
#define _SPRD_DMA_H_
|
#define _SPRD_DMA_H_
|
||||||
|
|
||||||
#define SPRD_DMA_REQ_SHIFT 16
|
#define SPRD_DMA_REQ_SHIFT 8
|
||||||
#define SPRD_DMA_FLAGS(req_mode, int_type) \
|
#define SPRD_DMA_TRG_MODE_SHIFT 16
|
||||||
((req_mode) << SPRD_DMA_REQ_SHIFT | (int_type))
|
#define SPRD_DMA_CHN_MODE_SHIFT 24
|
||||||
|
#define SPRD_DMA_FLAGS(chn_mode, trg_mode, req_mode, int_type) \
|
||||||
|
((chn_mode) << SPRD_DMA_CHN_MODE_SHIFT | \
|
||||||
|
(trg_mode) << SPRD_DMA_TRG_MODE_SHIFT | \
|
||||||
|
(req_mode) << SPRD_DMA_REQ_SHIFT | (int_type))
|
||||||
|
|
||||||
|
/*
|
||||||
|
* The Spreadtrum DMA controller supports channel 2-stage tansfer, that means
|
||||||
|
* we can request 2 dma channels, one for source channel, and another one for
|
||||||
|
* destination channel. Each channel is independent, and has its own
|
||||||
|
* configurations. Once the source channel's transaction is done, it will
|
||||||
|
* trigger the destination channel's transaction automatically by hardware
|
||||||
|
* signal.
|
||||||
|
*
|
||||||
|
* To support 2-stage tansfer, we must configure the channel mode and trigger
|
||||||
|
* mode as below definition.
|
||||||
|
*/
|
||||||
|
|
||||||
|
/*
|
||||||
|
* enum sprd_dma_chn_mode: define the DMA channel mode for 2-stage transfer
|
||||||
|
* @SPRD_DMA_CHN_MODE_NONE: No channel mode setting which means channel doesn't
|
||||||
|
* support the 2-stage transfer.
|
||||||
|
* @SPRD_DMA_SRC_CHN0: Channel used as source channel 0.
|
||||||
|
* @SPRD_DMA_SRC_CHN1: Channel used as source channel 1.
|
||||||
|
* @SPRD_DMA_DST_CHN0: Channel used as destination channel 0.
|
||||||
|
* @SPRD_DMA_DST_CHN1: Channel used as destination channel 1.
|
||||||
|
*
|
||||||
|
* Now the DMA controller can supports 2 groups 2-stage transfer.
|
||||||
|
*/
|
||||||
|
enum sprd_dma_chn_mode {
|
||||||
|
SPRD_DMA_CHN_MODE_NONE,
|
||||||
|
SPRD_DMA_SRC_CHN0,
|
||||||
|
SPRD_DMA_SRC_CHN1,
|
||||||
|
SPRD_DMA_DST_CHN0,
|
||||||
|
SPRD_DMA_DST_CHN1,
|
||||||
|
};
|
||||||
|
|
||||||
|
/*
|
||||||
|
* enum sprd_dma_trg_mode: define the DMA channel trigger mode for 2-stage
|
||||||
|
* transfer
|
||||||
|
* @SPRD_DMA_NO_TRG: No trigger setting.
|
||||||
|
* @SPRD_DMA_FRAG_DONE_TRG: Trigger the transaction of destination channel
|
||||||
|
* automatically once the source channel's fragment request is done.
|
||||||
|
* @SPRD_DMA_BLOCK_DONE_TRG: Trigger the transaction of destination channel
|
||||||
|
* automatically once the source channel's block request is done.
|
||||||
|
* @SPRD_DMA_TRANS_DONE_TRG: Trigger the transaction of destination channel
|
||||||
|
* automatically once the source channel's transfer request is done.
|
||||||
|
* @SPRD_DMA_LIST_DONE_TRG: Trigger the transaction of destination channel
|
||||||
|
* automatically once the source channel's link-list request is done.
|
||||||
|
*/
|
||||||
|
enum sprd_dma_trg_mode {
|
||||||
|
SPRD_DMA_NO_TRG,
|
||||||
|
SPRD_DMA_FRAG_DONE_TRG,
|
||||||
|
SPRD_DMA_BLOCK_DONE_TRG,
|
||||||
|
SPRD_DMA_TRANS_DONE_TRG,
|
||||||
|
SPRD_DMA_LIST_DONE_TRG,
|
||||||
|
};
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* enum sprd_dma_req_mode: define the DMA request mode
|
* enum sprd_dma_req_mode: define the DMA request mode
|
||||||
|
|
Loading…
Reference in New Issue