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authorJiri Kosina <jkosina@suse.cz>2011-04-26 10:22:15 +0200
committerJiri Kosina <jkosina@suse.cz>2011-04-26 10:22:59 +0200
commit07f9479a40cc778bc1462ada11f95b01360ae4ff (patch)
tree0676cf38df3844004bb3ebfd99dfa67a4a8998f5 /drivers/dma/ste_dma40_ll.c
parent9d5e6bdb3013acfb311ab407eeca0b6a6a3dedbf (diff)
parentcd2e49e90f1cae7726c9a2c54488d881d7f1cd1c (diff)
downloadlinux-07f9479a40cc778bc1462ada11f95b01360ae4ff.tar.gz
Merge branch 'master' into for-next
Fast-forwarded to current state of Linus' tree as there are patches to be applied for files that didn't exist on the old branch.
Diffstat (limited to 'drivers/dma/ste_dma40_ll.c')
-rw-r--r--drivers/dma/ste_dma40_ll.c218
1 files changed, 79 insertions, 139 deletions
diff --git a/drivers/dma/ste_dma40_ll.c b/drivers/dma/ste_dma40_ll.c
index 0b096a38322..cad9e1daedf 100644
--- a/drivers/dma/ste_dma40_ll.c
+++ b/drivers/dma/ste_dma40_ll.c
@@ -125,13 +125,15 @@ void d40_phy_cfg(struct stedma40_chan_cfg *cfg,
static int d40_phy_fill_lli(struct d40_phy_lli *lli,
dma_addr_t data,
u32 data_size,
- int psize,
dma_addr_t next_lli,
u32 reg_cfg,
- bool term_int,
- u32 data_width,
- bool is_device)
+ struct stedma40_half_channel_info *info,
+ unsigned int flags)
{
+ bool addr_inc = flags & LLI_ADDR_INC;
+ bool term_int = flags & LLI_TERM_INT;
+ unsigned int data_width = info->data_width;
+ int psize = info->psize;
int num_elems;
if (psize == STEDMA40_PSIZE_PHY_1)
@@ -154,7 +156,7 @@ static int d40_phy_fill_lli(struct d40_phy_lli *lli,
* Distance to next element sized entry.
* Usually the size of the element unless you want gaps.
*/
- if (!is_device)
+ if (addr_inc)
lli->reg_elt |= (0x1 << data_width) <<
D40_SREG_ELEM_PHY_EIDX_POS;
@@ -198,47 +200,51 @@ static int d40_seg_size(int size, int data_width1, int data_width2)
return seg_max;
}
-struct d40_phy_lli *d40_phy_buf_to_lli(struct d40_phy_lli *lli,
- dma_addr_t addr,
- u32 size,
- int psize,
- dma_addr_t lli_phys,
- u32 reg_cfg,
- bool term_int,
- u32 data_width1,
- u32 data_width2,
- bool is_device)
+static struct d40_phy_lli *
+d40_phy_buf_to_lli(struct d40_phy_lli *lli, dma_addr_t addr, u32 size,
+ dma_addr_t lli_phys, dma_addr_t first_phys, u32 reg_cfg,
+ struct stedma40_half_channel_info *info,
+ struct stedma40_half_channel_info *otherinfo,
+ unsigned long flags)
{
+ bool lastlink = flags & LLI_LAST_LINK;
+ bool addr_inc = flags & LLI_ADDR_INC;
+ bool term_int = flags & LLI_TERM_INT;
+ bool cyclic = flags & LLI_CYCLIC;
int err;
dma_addr_t next = lli_phys;
int size_rest = size;
int size_seg = 0;
+ /*
+ * This piece may be split up based on d40_seg_size(); we only want the
+ * term int on the last part.
+ */
+ if (term_int)
+ flags &= ~LLI_TERM_INT;
+
do {
- size_seg = d40_seg_size(size_rest, data_width1, data_width2);
+ size_seg = d40_seg_size(size_rest, info->data_width,
+ otherinfo->data_width);
size_rest -= size_seg;
- if (term_int && size_rest == 0)
- next = 0;
+ if (size_rest == 0 && term_int)
+ flags |= LLI_TERM_INT;
+
+ if (size_rest == 0 && lastlink)
+ next = cyclic ? first_phys : 0;
else
next = ALIGN(next + sizeof(struct d40_phy_lli),
D40_LLI_ALIGN);
- err = d40_phy_fill_lli(lli,
- addr,
- size_seg,
- psize,
- next,
- reg_cfg,
- !next,
- data_width1,
- is_device);
+ err = d40_phy_fill_lli(lli, addr, size_seg, next,
+ reg_cfg, info, flags);
if (err)
goto err;
lli++;
- if (!is_device)
+ if (addr_inc)
addr += size_seg;
} while (size_rest);
@@ -254,39 +260,35 @@ int d40_phy_sg_to_lli(struct scatterlist *sg,
struct d40_phy_lli *lli_sg,
dma_addr_t lli_phys,
u32 reg_cfg,
- u32 data_width1,
- u32 data_width2,
- int psize)
+ struct stedma40_half_channel_info *info,
+ struct stedma40_half_channel_info *otherinfo,
+ unsigned long flags)
{
int total_size = 0;
int i;
struct scatterlist *current_sg = sg;
- dma_addr_t dst;
struct d40_phy_lli *lli = lli_sg;
dma_addr_t l_phys = lli_phys;
+ if (!target)
+ flags |= LLI_ADDR_INC;
+
for_each_sg(sg, current_sg, sg_len, i) {
+ dma_addr_t sg_addr = sg_dma_address(current_sg);
+ unsigned int len = sg_dma_len(current_sg);
+ dma_addr_t dst = target ?: sg_addr;
total_size += sg_dma_len(current_sg);
- if (target)
- dst = target;
- else
- dst = sg_phys(current_sg);
+ if (i == sg_len - 1)
+ flags |= LLI_TERM_INT | LLI_LAST_LINK;
l_phys = ALIGN(lli_phys + (lli - lli_sg) *
sizeof(struct d40_phy_lli), D40_LLI_ALIGN);
- lli = d40_phy_buf_to_lli(lli,
- dst,
- sg_dma_len(current_sg),
- psize,
- l_phys,
- reg_cfg,
- sg_len - 1 == i,
- data_width1,
- data_width2,
- target == dst);
+ lli = d40_phy_buf_to_lli(lli, dst, len, l_phys, lli_phys,
+ reg_cfg, info, otherinfo, flags);
+
if (lli == NULL)
return -EINVAL;
}
@@ -295,45 +297,22 @@ int d40_phy_sg_to_lli(struct scatterlist *sg,
}
-void d40_phy_lli_write(void __iomem *virtbase,
- u32 phy_chan_num,
- struct d40_phy_lli *lli_dst,
- struct d40_phy_lli *lli_src)
-{
-
- writel(lli_src->reg_cfg, virtbase + D40_DREG_PCBASE +
- phy_chan_num * D40_DREG_PCDELTA + D40_CHAN_REG_SSCFG);
- writel(lli_src->reg_elt, virtbase + D40_DREG_PCBASE +
- phy_chan_num * D40_DREG_PCDELTA + D40_CHAN_REG_SSELT);
- writel(lli_src->reg_ptr, virtbase + D40_DREG_PCBASE +
- phy_chan_num * D40_DREG_PCDELTA + D40_CHAN_REG_SSPTR);
- writel(lli_src->reg_lnk, virtbase + D40_DREG_PCBASE +
- phy_chan_num * D40_DREG_PCDELTA + D40_CHAN_REG_SSLNK);
-
- writel(lli_dst->reg_cfg, virtbase + D40_DREG_PCBASE +
- phy_chan_num * D40_DREG_PCDELTA + D40_CHAN_REG_SDCFG);
- writel(lli_dst->reg_elt, virtbase + D40_DREG_PCBASE +
- phy_chan_num * D40_DREG_PCDELTA + D40_CHAN_REG_SDELT);
- writel(lli_dst->reg_ptr, virtbase + D40_DREG_PCBASE +
- phy_chan_num * D40_DREG_PCDELTA + D40_CHAN_REG_SDPTR);
- writel(lli_dst->reg_lnk, virtbase + D40_DREG_PCBASE +
- phy_chan_num * D40_DREG_PCDELTA + D40_CHAN_REG_SDLNK);
-
-}
-
/* DMA logical lli operations */
static void d40_log_lli_link(struct d40_log_lli *lli_dst,
struct d40_log_lli *lli_src,
- int next)
+ int next, unsigned int flags)
{
+ bool interrupt = flags & LLI_TERM_INT;
u32 slos = 0;
u32 dlos = 0;
if (next != -EINVAL) {
slos = next * 2;
dlos = next * 2 + 1;
- } else {
+ }
+
+ if (interrupt) {
lli_dst->lcsp13 |= D40_MEM_LCSP1_SCFG_TIM_MASK;
lli_dst->lcsp13 |= D40_MEM_LCSP3_DTCP_MASK;
}
@@ -348,9 +327,9 @@ static void d40_log_lli_link(struct d40_log_lli *lli_dst,
void d40_log_lli_lcpa_write(struct d40_log_lli_full *lcpa,
struct d40_log_lli *lli_dst,
struct d40_log_lli *lli_src,
- int next)
+ int next, unsigned int flags)
{
- d40_log_lli_link(lli_dst, lli_src, next);
+ d40_log_lli_link(lli_dst, lli_src, next, flags);
writel(lli_src->lcsp02, &lcpa[0].lcsp0);
writel(lli_src->lcsp13, &lcpa[0].lcsp1);
@@ -361,9 +340,9 @@ void d40_log_lli_lcpa_write(struct d40_log_lli_full *lcpa,
void d40_log_lli_lcla_write(struct d40_log_lli *lcla,
struct d40_log_lli *lli_dst,
struct d40_log_lli *lli_src,
- int next)
+ int next, unsigned int flags)
{
- d40_log_lli_link(lli_dst, lli_src, next);
+ d40_log_lli_link(lli_dst, lli_src, next, flags);
writel(lli_src->lcsp02, &lcla[0].lcsp02);
writel(lli_src->lcsp13, &lcla[0].lcsp13);
@@ -375,8 +354,10 @@ static void d40_log_fill_lli(struct d40_log_lli *lli,
dma_addr_t data, u32 data_size,
u32 reg_cfg,
u32 data_width,
- bool addr_inc)
+ unsigned int flags)
{
+ bool addr_inc = flags & LLI_ADDR_INC;
+
lli->lcsp13 = reg_cfg;
/* The number of elements to transfer */
@@ -395,67 +376,15 @@ static void d40_log_fill_lli(struct d40_log_lli *lli,
}
-int d40_log_sg_to_dev(struct scatterlist *sg,
- int sg_len,
- struct d40_log_lli_bidir *lli,
- struct d40_def_lcsp *lcsp,
- u32 src_data_width,
- u32 dst_data_width,
- enum dma_data_direction direction,
- dma_addr_t dev_addr)
-{
- int total_size = 0;
- struct scatterlist *current_sg = sg;
- int i;
- struct d40_log_lli *lli_src = lli->src;
- struct d40_log_lli *lli_dst = lli->dst;
-
- for_each_sg(sg, current_sg, sg_len, i) {
- total_size += sg_dma_len(current_sg);
-
- if (direction == DMA_TO_DEVICE) {
- lli_src =
- d40_log_buf_to_lli(lli_src,
- sg_phys(current_sg),
- sg_dma_len(current_sg),
- lcsp->lcsp1, src_data_width,
- dst_data_width,
- true);
- lli_dst =
- d40_log_buf_to_lli(lli_dst,
- dev_addr,
- sg_dma_len(current_sg),
- lcsp->lcsp3, dst_data_width,
- src_data_width,
- false);
- } else {
- lli_dst =
- d40_log_buf_to_lli(lli_dst,
- sg_phys(current_sg),
- sg_dma_len(current_sg),
- lcsp->lcsp3, dst_data_width,
- src_data_width,
- true);
- lli_src =
- d40_log_buf_to_lli(lli_src,
- dev_addr,
- sg_dma_len(current_sg),
- lcsp->lcsp1, src_data_width,
- dst_data_width,
- false);
- }
- }
- return total_size;
-}
-
-struct d40_log_lli *d40_log_buf_to_lli(struct d40_log_lli *lli_sg,
+static struct d40_log_lli *d40_log_buf_to_lli(struct d40_log_lli *lli_sg,
dma_addr_t addr,
int size,
u32 lcsp13, /* src or dst*/
u32 data_width1,
u32 data_width2,
- bool addr_inc)
+ unsigned int flags)
{
+ bool addr_inc = flags & LLI_ADDR_INC;
struct d40_log_lli *lli = lli_sg;
int size_rest = size;
int size_seg = 0;
@@ -468,7 +397,7 @@ struct d40_log_lli *d40_log_buf_to_lli(struct d40_log_lli *lli_sg,
addr,
size_seg,
lcsp13, data_width1,
- addr_inc);
+ flags);
if (addr_inc)
addr += size_seg;
lli++;
@@ -479,6 +408,7 @@ struct d40_log_lli *d40_log_buf_to_lli(struct d40_log_lli *lli_sg,
int d40_log_sg_to_lli(struct scatterlist *sg,
int sg_len,
+ dma_addr_t dev_addr,
struct d40_log_lli *lli_sg,
u32 lcsp13, /* src or dst*/
u32 data_width1, u32 data_width2)
@@ -487,14 +417,24 @@ int d40_log_sg_to_lli(struct scatterlist *sg,
struct scatterlist *current_sg = sg;
int i;
struct d40_log_lli *lli = lli_sg;
+ unsigned long flags = 0;
+
+ if (!dev_addr)
+ flags |= LLI_ADDR_INC;
for_each_sg(sg, current_sg, sg_len, i) {
+ dma_addr_t sg_addr = sg_dma_address(current_sg);
+ unsigned int len = sg_dma_len(current_sg);
+ dma_addr_t addr = dev_addr ?: sg_addr;
+
total_size += sg_dma_len(current_sg);
- lli = d40_log_buf_to_lli(lli,
- sg_phys(current_sg),
- sg_dma_len(current_sg),
+
+ lli = d40_log_buf_to_lli(lli, addr, len,
lcsp13,
- data_width1, data_width2, true);
+ data_width1,
+ data_width2,
+ flags);
}
+
return total_size;
}