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-rw-r--r--arch/arm/mach-omap1/mcbsp.c16
-rw-r--r--arch/arm/mach-omap2/mcbsp.c20
-rw-r--r--arch/arm/plat-omap/include/plat/mcbsp.h3
-rw-r--r--arch/arm/plat-omap/mcbsp.c77
4 files changed, 84 insertions, 32 deletions
diff --git a/arch/arm/mach-omap1/mcbsp.c b/arch/arm/mach-omap1/mcbsp.c
index 6bddce104ee9..f9a5cf750b59 100644
--- a/arch/arm/mach-omap1/mcbsp.c
+++ b/arch/arm/mach-omap1/mcbsp.c
@@ -99,9 +99,11 @@ static struct omap_mcbsp_platform_data omap7xx_mcbsp_pdata[] = {
},
};
#define OMAP7XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap7xx_mcbsp_pdata)
+#define OMAP7XX_MCBSP_REG_NUM (OMAP_MCBSP_REG_XCERH / sizeof(u16) + 1)
#else
#define omap7xx_mcbsp_pdata NULL
#define OMAP7XX_MCBSP_PDATA_SZ 0
+#define OMAP7XX_MCBSP_REG_NUM 0
#endif
#ifdef CONFIG_ARCH_OMAP15XX
@@ -132,9 +134,11 @@ static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = {
},
};
#define OMAP15XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap15xx_mcbsp_pdata)
+#define OMAP15XX_MCBSP_REG_NUM (OMAP_MCBSP_REG_XCERH / sizeof(u16) + 1)
#else
#define omap15xx_mcbsp_pdata NULL
#define OMAP15XX_MCBSP_PDATA_SZ 0
+#define OMAP15XX_MCBSP_REG_NUM 0
#endif
#ifdef CONFIG_ARCH_OMAP16XX
@@ -165,19 +169,25 @@ static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = {
},
};
#define OMAP16XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap16xx_mcbsp_pdata)
+#define OMAP16XX_MCBSP_REG_NUM (OMAP_MCBSP_REG_XCERH / sizeof(u16) + 1)
#else
#define omap16xx_mcbsp_pdata NULL
#define OMAP16XX_MCBSP_PDATA_SZ 0
+#define OMAP16XX_MCBSP_REG_NUM 0
#endif
int __init omap1_mcbsp_init(void)
{
- if (cpu_is_omap7xx())
+ if (cpu_is_omap7xx()) {
omap_mcbsp_count = OMAP7XX_MCBSP_PDATA_SZ;
- if (cpu_is_omap15xx())
+ omap_mcbsp_cache_size = OMAP7XX_MCBSP_REG_NUM * sizeof(u16);
+ } else if (cpu_is_omap15xx()) {
omap_mcbsp_count = OMAP15XX_MCBSP_PDATA_SZ;
- if (cpu_is_omap16xx())
+ omap_mcbsp_cache_size = OMAP15XX_MCBSP_REG_NUM * sizeof(u16);
+ } else if (cpu_is_omap16xx()) {
omap_mcbsp_count = OMAP16XX_MCBSP_PDATA_SZ;
+ omap_mcbsp_cache_size = OMAP16XX_MCBSP_REG_NUM * sizeof(u16);
+ }
mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
GFP_KERNEL);
diff --git a/arch/arm/mach-omap2/mcbsp.c b/arch/arm/mach-omap2/mcbsp.c
index 4b6e5157520f..d601f9405d11 100644
--- a/arch/arm/mach-omap2/mcbsp.c
+++ b/arch/arm/mach-omap2/mcbsp.c
@@ -65,9 +65,11 @@ static struct omap_mcbsp_platform_data omap2420_mcbsp_pdata[] = {
},
};
#define OMAP2420_MCBSP_PDATA_SZ ARRAY_SIZE(omap2420_mcbsp_pdata)
+#define OMAP2420_MCBSP_REG_NUM (OMAP_MCBSP_REG_RCCR / sizeof(u32) + 1)
#else
#define omap2420_mcbsp_pdata NULL
#define OMAP2420_MCBSP_PDATA_SZ 0
+#define OMAP2420_MCBSP_REG_NUM 0
#endif
#ifdef CONFIG_ARCH_OMAP2430
@@ -114,9 +116,11 @@ static struct omap_mcbsp_platform_data omap2430_mcbsp_pdata[] = {
},
};
#define OMAP2430_MCBSP_PDATA_SZ ARRAY_SIZE(omap2430_mcbsp_pdata)
+#define OMAP2430_MCBSP_REG_NUM (OMAP_MCBSP_REG_RCCR / sizeof(u32) + 1)
#else
#define omap2430_mcbsp_pdata NULL
#define OMAP2430_MCBSP_PDATA_SZ 0
+#define OMAP2430_MCBSP_REG_NUM 0
#endif
#ifdef CONFIG_ARCH_OMAP3
@@ -168,9 +172,11 @@ static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = {
},
};
#define OMAP34XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap34xx_mcbsp_pdata)
+#define OMAP34XX_MCBSP_REG_NUM (OMAP_MCBSP_REG_RCCR / sizeof(u32) + 1)
#else
#define omap34xx_mcbsp_pdata NULL
#define OMAP34XX_MCBSP_PDATA_SZ 0
+#define OMAP34XX_MCBSP_REG_NUM 0
#endif
static struct omap_mcbsp_platform_data omap44xx_mcbsp_pdata[] = {
@@ -208,17 +214,23 @@ static struct omap_mcbsp_platform_data omap44xx_mcbsp_pdata[] = {
},
};
#define OMAP44XX_MCBSP_PDATA_SZ ARRAY_SIZE(omap44xx_mcbsp_pdata)
+#define OMAP44XX_MCBSP_REG_NUM (OMAP_MCBSP_REG_RCCR / sizeof(u32) + 1)
static int __init omap2_mcbsp_init(void)
{
- if (cpu_is_omap2420())
+ if (cpu_is_omap2420()) {
omap_mcbsp_count = OMAP2420_MCBSP_PDATA_SZ;
- if (cpu_is_omap2430())
+ omap_mcbsp_cache_size = OMAP2420_MCBSP_REG_NUM * sizeof(u16);
+ } else if (cpu_is_omap2430()) {
omap_mcbsp_count = OMAP2430_MCBSP_PDATA_SZ;
- if (cpu_is_omap34xx())
+ omap_mcbsp_cache_size = OMAP2430_MCBSP_REG_NUM * sizeof(u32);
+ } else if (cpu_is_omap34xx()) {
omap_mcbsp_count = OMAP34XX_MCBSP_PDATA_SZ;
- if (cpu_is_omap44xx())
+ omap_mcbsp_cache_size = OMAP34XX_MCBSP_REG_NUM * sizeof(u32);
+ } else if (cpu_is_omap44xx()) {
omap_mcbsp_count = OMAP44XX_MCBSP_PDATA_SZ;
+ omap_mcbsp_cache_size = OMAP44XX_MCBSP_REG_NUM * sizeof(u32);
+ }
mcbsp_ptr = kzalloc(omap_mcbsp_count * sizeof(struct omap_mcbsp *),
GFP_KERNEL);
diff --git a/arch/arm/plat-omap/include/plat/mcbsp.h b/arch/arm/plat-omap/include/plat/mcbsp.h
index d93fa44b1c9a..4df957b1d252 100644
--- a/arch/arm/plat-omap/include/plat/mcbsp.h
+++ b/arch/arm/plat-omap/include/plat/mcbsp.h
@@ -414,9 +414,10 @@ struct omap_mcbsp {
u16 max_tx_thres;
u16 max_rx_thres;
#endif
+ void *reg_cache;
};
extern struct omap_mcbsp **mcbsp_ptr;
-extern int omap_mcbsp_count;
+extern int omap_mcbsp_count, omap_mcbsp_cache_size;
int omap_mcbsp_init(void);
void omap_mcbsp_register_board_cfg(struct omap_mcbsp_platform_data *config,
diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c
index f8245f25825b..61e440a0f7cd 100644
--- a/arch/arm/plat-omap/mcbsp.c
+++ b/arch/arm/plat-omap/mcbsp.c
@@ -28,28 +28,42 @@
#include <plat/mcbsp.h>
struct omap_mcbsp **mcbsp_ptr;
-int omap_mcbsp_count;
+int omap_mcbsp_count, omap_mcbsp_cache_size;
void omap_mcbsp_write(struct omap_mcbsp *mcbsp, u16 reg, u32 val)
{
- if (cpu_class_is_omap1() || cpu_is_omap2420())
+ if (cpu_class_is_omap1()) {
+ ((u16 *)mcbsp->reg_cache)[reg / sizeof(u16)] = (u16)val;
__raw_writew((u16)val, mcbsp->io_base + reg);
- else
+ } else if (cpu_is_omap2420()) {
+ ((u16 *)mcbsp->reg_cache)[reg / sizeof(u32)] = (u16)val;
+ __raw_writew((u16)val, mcbsp->io_base + reg);
+ } else {
+ ((u32 *)mcbsp->reg_cache)[reg / sizeof(u32)] = val;
__raw_writel(val, mcbsp->io_base + reg);
+ }
}
-int omap_mcbsp_read(struct omap_mcbsp *mcbsp, u16 reg)
+int omap_mcbsp_read(struct omap_mcbsp *mcbsp, u16 reg, bool from_cache)
{
- if (cpu_class_is_omap1() || cpu_is_omap2420())
- return __raw_readw(mcbsp->io_base + reg);
- else
- return __raw_readl(mcbsp->io_base + reg);
+ if (cpu_class_is_omap1()) {
+ return !from_cache ? __raw_readw(mcbsp->io_base + reg) :
+ ((u16 *)mcbsp->reg_cache)[reg / sizeof(u16)];
+ } else if (cpu_is_omap2420()) {
+ return !from_cache ? __raw_readw(mcbsp->io_base + reg) :
+ ((u16 *)mcbsp->reg_cache)[reg / sizeof(u32)];
+ } else {
+ return !from_cache ? __raw_readl(mcbsp->io_base + reg) :
+ ((u32 *)mcbsp->reg_cache)[reg / sizeof(u32)];
+ }
}
#define MCBSP_READ(mcbsp, reg) \
- omap_mcbsp_read(mcbsp, OMAP_MCBSP_REG_##reg)
+ omap_mcbsp_read(mcbsp, OMAP_MCBSP_REG_##reg, 0)
#define MCBSP_WRITE(mcbsp, reg, val) \
omap_mcbsp_write(mcbsp, OMAP_MCBSP_REG_##reg, val)
+#define MCBSP_READ_CACHE(mcbsp, reg) \
+ omap_mcbsp_read(mcbsp, OMAP_MCBSP_REG_##reg, 1)
#define omap_mcbsp_check_valid_id(id) (id < omap_mcbsp_count)
#define id_to_mcbsp_ptr(id) mcbsp_ptr[id];
@@ -383,6 +397,7 @@ EXPORT_SYMBOL(omap_mcbsp_set_io_type);
int omap_mcbsp_request(unsigned int id)
{
struct omap_mcbsp *mcbsp;
+ void *reg_cache;
int err;
if (!omap_mcbsp_check_valid_id(id)) {
@@ -391,15 +406,21 @@ int omap_mcbsp_request(unsigned int id)
}
mcbsp = id_to_mcbsp_ptr(id);
+ reg_cache = kzalloc(omap_mcbsp_cache_size, GFP_KERNEL);
+ if (!reg_cache) {
+ return -ENOMEM;
+ }
+
spin_lock(&mcbsp->lock);
if (!mcbsp->free) {
dev_err(mcbsp->dev, "McBSP%d is currently in use\n",
mcbsp->id);
- spin_unlock(&mcbsp->lock);
- return -EBUSY;
+ err = -EBUSY;
+ goto err_kfree;
}
mcbsp->free = 0;
+ mcbsp->reg_cache = reg_cache;
spin_unlock(&mcbsp->lock);
if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->request)
@@ -427,7 +448,7 @@ int omap_mcbsp_request(unsigned int id)
dev_err(mcbsp->dev, "Unable to request TX IRQ %d "
"for McBSP%d\n", mcbsp->tx_irq,
mcbsp->id);
- goto error;
+ goto err_clk_disable;
}
init_completion(&mcbsp->rx_irq_completion);
@@ -437,16 +458,16 @@ int omap_mcbsp_request(unsigned int id)
dev_err(mcbsp->dev, "Unable to request RX IRQ %d "
"for McBSP%d\n", mcbsp->rx_irq,
mcbsp->id);
- goto tx_irq;
+ goto err_free_irq;
}
}
return 0;
-tx_irq:
+err_free_irq:
free_irq(mcbsp->tx_irq, (void *)mcbsp);
-error:
+err_clk_disable:
if (mcbsp->pdata && mcbsp->pdata->ops && mcbsp->pdata->ops->free)
- mcbsp->pdata->ops->free(id);
+ mcbsp->pdata->ops->free(id);
/* Do procedure specific to omap34xx arch, if applicable */
omap34xx_mcbsp_free(mcbsp);
@@ -454,7 +475,12 @@ error:
clk_disable(mcbsp->fclk);
clk_disable(mcbsp->iclk);
+ spin_lock(&mcbsp->lock);
mcbsp->free = 1;
+ mcbsp->reg_cache = NULL;
+err_kfree:
+ spin_unlock(&mcbsp->lock);
+ kfree(reg_cache);
return err;
}
@@ -463,6 +489,7 @@ EXPORT_SYMBOL(omap_mcbsp_request);
void omap_mcbsp_free(unsigned int id)
{
struct omap_mcbsp *mcbsp;
+ void *reg_cache;
if (!omap_mcbsp_check_valid_id(id)) {
printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
@@ -485,16 +512,18 @@ void omap_mcbsp_free(unsigned int id)
free_irq(mcbsp->tx_irq, (void *)mcbsp);
}
- spin_lock(&mcbsp->lock);
- if (mcbsp->free) {
- dev_err(mcbsp->dev, "McBSP%d was not reserved\n",
- mcbsp->id);
- spin_unlock(&mcbsp->lock);
- return;
- }
+ reg_cache = mcbsp->reg_cache;
- mcbsp->free = 1;
+ spin_lock(&mcbsp->lock);
+ if (mcbsp->free)
+ dev_err(mcbsp->dev, "McBSP%d was not reserved\n", mcbsp->id);
+ else
+ mcbsp->free = 1;
+ mcbsp->reg_cache = NULL;
spin_unlock(&mcbsp->lock);
+
+ if (reg_cache)
+ kfree(reg_cache);
}
EXPORT_SYMBOL(omap_mcbsp_free);
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-18 17:26:47 +0300