SH: constify multiple DMA related objects and references to them
Lists of DMA channels and slaves are not changed, make them constant. Besides,
SH7724 channel and slave configuration of both DMA controllers is identical,
remove the extra copy of the configuration data.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7722.c b/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
index dc9b30d..24c6167 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7722.c
@@ -24,7 +24,7 @@
#include <cpu/dma-register.h>
#include <cpu/sh7722.h>
-static struct sh_dmae_slave_config sh7722_dmae_slaves[] = {
+static const struct sh_dmae_slave_config sh7722_dmae_slaves[] = {
{
.slave_id = SHDMA_SLAVE_SCIF0_TX,
.addr = 0xffe0000c,
@@ -78,7 +78,7 @@
},
};
-static struct sh_dmae_channel sh7722_dmae_channels[] = {
+static const struct sh_dmae_channel sh7722_dmae_channels[] = {
{
.offset = 0,
.dmars = 0,
@@ -106,7 +106,7 @@
}
};
-static unsigned int ts_shift[] = TS_SHIFT;
+static const unsigned int ts_shift[] = TS_SHIFT;
static struct sh_dmae_pdata dma_platform_data = {
.slave = sh7722_dmae_slaves,
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
index 8a0a4a9..89fe16d2 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7724.c
@@ -31,7 +31,7 @@
#include <cpu/sh7724.h>
/* DMA */
-static struct sh_dmae_channel sh7724_dmae0_channels[] = {
+static const struct sh_dmae_channel sh7724_dmae_channels[] = {
{
.offset = 0,
.dmars = 0,
@@ -59,51 +59,11 @@
}
};
-static struct sh_dmae_channel sh7724_dmae1_channels[] = {
- {
- .offset = 0,
- .dmars = 0,
- .dmars_bit = 0,
- }, {
- .offset = 0x10,
- .dmars = 0,
- .dmars_bit = 8,
- }, {
- .offset = 0x20,
- .dmars = 4,
- .dmars_bit = 0,
- }, {
- .offset = 0x30,
- .dmars = 4,
- .dmars_bit = 8,
- }, {
- .offset = 0x50,
- .dmars = 8,
- .dmars_bit = 0,
- }, {
- .offset = 0x60,
- .dmars = 8,
- .dmars_bit = 8,
- }
-};
+static const unsigned int ts_shift[] = TS_SHIFT;
-static unsigned int ts_shift[] = TS_SHIFT;
-
-static struct sh_dmae_pdata dma0_platform_data = {
- .channel = sh7724_dmae0_channels,
- .channel_num = ARRAY_SIZE(sh7724_dmae0_channels),
- .ts_low_shift = CHCR_TS_LOW_SHIFT,
- .ts_low_mask = CHCR_TS_LOW_MASK,
- .ts_high_shift = CHCR_TS_HIGH_SHIFT,
- .ts_high_mask = CHCR_TS_HIGH_MASK,
- .ts_shift = ts_shift,
- .ts_shift_num = ARRAY_SIZE(ts_shift),
- .dmaor_init = DMAOR_INIT,
-};
-
-static struct sh_dmae_pdata dma1_platform_data = {
- .channel = sh7724_dmae1_channels,
- .channel_num = ARRAY_SIZE(sh7724_dmae1_channels),
+static struct sh_dmae_pdata dma_platform_data = {
+ .channel = sh7724_dmae_channels,
+ .channel_num = ARRAY_SIZE(sh7724_dmae_channels),
.ts_low_shift = CHCR_TS_LOW_SHIFT,
.ts_low_mask = CHCR_TS_LOW_MASK,
.ts_high_shift = CHCR_TS_HIGH_SHIFT,
@@ -187,7 +147,7 @@
.resource = sh7724_dmae0_resources,
.num_resources = ARRAY_SIZE(sh7724_dmae0_resources),
.dev = {
- .platform_data = &dma0_platform_data,
+ .platform_data = &dma_platform_data,
},
.archdata = {
.hwblk_id = HWBLK_DMAC0,
@@ -200,7 +160,7 @@
.resource = sh7724_dmae1_resources,
.num_resources = ARRAY_SIZE(sh7724_dmae1_resources),
.dev = {
- .platform_data = &dma1_platform_data,
+ .platform_data = &dma_platform_data,
},
.archdata = {
.hwblk_id = HWBLK_DMAC1,
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7780.c b/arch/sh/kernel/cpu/sh4a/setup-sh7780.c
index 05fc38d..b12f537 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7780.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7780.c
@@ -233,7 +233,7 @@
};
/* DMA */
-static struct sh_dmae_channel sh7780_dmae0_channels[] = {
+static const struct sh_dmae_channel sh7780_dmae0_channels[] = {
{
.offset = 0,
.dmars = 0,
@@ -261,7 +261,7 @@
}
};
-static struct sh_dmae_channel sh7780_dmae1_channels[] = {
+static const struct sh_dmae_channel sh7780_dmae1_channels[] = {
{
.offset = 0,
}, {
@@ -277,7 +277,7 @@
}
};
-static unsigned int ts_shift[] = TS_SHIFT;
+static const unsigned int ts_shift[] = TS_SHIFT;
static struct sh_dmae_pdata dma0_platform_data = {
.channel = sh7780_dmae0_channels,
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7785.c b/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
index 07bb2d4..f3e3ea0 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7785.c
@@ -275,7 +275,7 @@
};
/* DMA */
-static struct sh_dmae_channel sh7785_dmae0_channels[] = {
+static const struct sh_dmae_channel sh7785_dmae0_channels[] = {
{
.offset = 0,
.dmars = 0,
@@ -303,7 +303,7 @@
}
};
-static struct sh_dmae_channel sh7785_dmae1_channels[] = {
+static const struct sh_dmae_channel sh7785_dmae1_channels[] = {
{
.offset = 0,
}, {
@@ -319,7 +319,7 @@
}
};
-static unsigned int ts_shift[] = TS_SHIFT;
+static const unsigned int ts_shift[] = TS_SHIFT;
static struct sh_dmae_pdata dma0_platform_data = {
.channel = sh7785_dmae0_channels,
diff --git a/arch/sh/kernel/cpu/sh4a/setup-sh7786.c b/arch/sh/kernel/cpu/sh4a/setup-sh7786.c
index d733603..8165709 100644
--- a/arch/sh/kernel/cpu/sh4a/setup-sh7786.c
+++ b/arch/sh/kernel/cpu/sh4a/setup-sh7786.c
@@ -445,7 +445,7 @@
.num_resources = ARRAY_SIZE(tmu11_resources),
};
-static struct sh_dmae_channel dmac0_channels[] = {
+static const struct sh_dmae_channel dmac0_channels[] = {
{
.offset = 0,
.dmars = 0,
@@ -473,7 +473,7 @@
}
};
-static unsigned int ts_shift[] = TS_SHIFT;
+static const unsigned int ts_shift[] = TS_SHIFT;
static struct sh_dmae_pdata dma0_platform_data = {
.channel = dmac0_channels,
diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index 7a18b58..aab352a 100644
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -188,7 +188,7 @@
struct sh_dmae_device *shdev = container_of(sh_chan->common.device,
struct sh_dmae_device, common);
struct sh_dmae_pdata *pdata = shdev->pdata;
- struct sh_dmae_channel *chan_pdata = &pdata->channel[sh_chan->id];
+ const struct sh_dmae_channel *chan_pdata = &pdata->channel[sh_chan->id];
u16 __iomem *addr = shdev->dmars + chan_pdata->dmars / sizeof(u16);
int shift = chan_pdata->dmars_bit;
@@ -264,7 +264,7 @@
return NULL;
}
-static struct sh_dmae_slave_config *sh_dmae_find_slave(
+static const struct sh_dmae_slave_config *sh_dmae_find_slave(
struct sh_dmae_chan *sh_chan, struct sh_dmae_slave *param)
{
struct dma_device *dma_dev = sh_chan->common.device;
@@ -296,7 +296,7 @@
* never runs concurrently with itself or free_chan_resources.
*/
if (param) {
- struct sh_dmae_slave_config *cfg;
+ const struct sh_dmae_slave_config *cfg;
cfg = sh_dmae_find_slave(sh_chan, param);
if (!cfg)
@@ -557,12 +557,14 @@
{
struct sh_dmae_slave *param;
struct sh_dmae_chan *sh_chan;
+ dma_addr_t slave_addr;
if (!chan)
return NULL;
sh_chan = to_sh_chan(chan);
param = chan->private;
+ slave_addr = param->config->addr;
/* Someone calling slave DMA on a public channel? */
if (!param || !sg_len) {
@@ -575,7 +577,7 @@
* if (param != NULL), this is a successfully requested slave channel,
* therefore param->config != NULL too.
*/
- return sh_dmae_prep_sg(sh_chan, sgl, sg_len, ¶m->config->addr,
+ return sh_dmae_prep_sg(sh_chan, sgl, sg_len, &slave_addr,
direction, flags);
}
@@ -856,7 +858,7 @@
int irq, unsigned long flags)
{
int err;
- struct sh_dmae_channel *chan_pdata = &shdev->pdata->channel[id];
+ const struct sh_dmae_channel *chan_pdata = &shdev->pdata->channel[id];
struct platform_device *pdev = to_platform_device(shdev->common.dev);
struct sh_dmae_chan *new_sh_chan;
diff --git a/include/linux/sh_dma.h b/include/linux/sh_dma.h
index cdaaff4..b08cd4e 100644
--- a/include/linux/sh_dma.h
+++ b/include/linux/sh_dma.h
@@ -17,7 +17,7 @@
struct sh_dmae_slave {
unsigned int slave_id; /* Set by the platform */
struct device *dma_dev; /* Set by the platform */
- struct sh_dmae_slave_config *config; /* Set by the driver */
+ const struct sh_dmae_slave_config *config; /* Set by the driver */
};
struct sh_dmae_regs {
@@ -36,6 +36,7 @@
int chunks;
int mark;
};
+
struct sh_dmae_slave_config {
unsigned int slave_id;
dma_addr_t addr;
@@ -50,15 +51,15 @@
};
struct sh_dmae_pdata {
- struct sh_dmae_slave_config *slave;
+ const struct sh_dmae_slave_config *slave;
int slave_num;
- struct sh_dmae_channel *channel;
+ const struct sh_dmae_channel *channel;
int channel_num;
unsigned int ts_low_shift;
unsigned int ts_low_mask;
unsigned int ts_high_shift;
unsigned int ts_high_mask;
- unsigned int *ts_shift;
+ const unsigned int *ts_shift;
int ts_shift_num;
u16 dmaor_init;
};