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-rw-r--r--arch/arm/mach-omap2/gpmc.c106
1 files changed, 99 insertions, 7 deletions
diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c
index 15876828db2..e86f5ca180e 100644
--- a/arch/arm/mach-omap2/gpmc.c
+++ b/arch/arm/mach-omap2/gpmc.c
@@ -24,9 +24,9 @@
#include <linux/module.h>
#include <asm/mach-types.h>
-#include <mach/gpmc.h>
+#include <plat/gpmc.h>
-#include <mach/sdrc.h>
+#include <plat/sdrc.h>
/* GPMC register offsets */
#define GPMC_REVISION 0x00
@@ -62,6 +62,33 @@
#define ENABLE_PREFETCH (0x1 << 7)
#define DMA_MPU_MODE 2
+/* Structure to save gpmc cs context */
+struct gpmc_cs_config {
+ u32 config1;
+ u32 config2;
+ u32 config3;
+ u32 config4;
+ u32 config5;
+ u32 config6;
+ u32 config7;
+ int is_valid;
+};
+
+/*
+ * Structure to save/restore gpmc context
+ * to support core off on OMAP3
+ */
+struct omap3_gpmc_regs {
+ u32 sysconfig;
+ u32 irqenable;
+ u32 timeout_ctrl;
+ u32 config;
+ u32 prefetch_config1;
+ u32 prefetch_config2;
+ u32 prefetch_control;
+ struct gpmc_cs_config cs_context[GPMC_CS_NUM];
+};
+
static struct resource gpmc_mem_root;
static struct resource gpmc_cs_mem[GPMC_CS_NUM];
static DEFINE_SPINLOCK(gpmc_mem_lock);
@@ -261,7 +288,7 @@ static void gpmc_cs_enable_mem(int cs, u32 base, u32 size)
l = (base >> GPMC_CHUNK_SHIFT) & 0x3f;
l &= ~(0x0f << 8);
l |= ((mask >> GPMC_CHUNK_SHIFT) & 0x0f) << 8;
- l |= 1 << 6; /* CSVALID */
+ l |= GPMC_CONFIG7_CSVALID;
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l);
}
@@ -270,7 +297,7 @@ static void gpmc_cs_disable_mem(int cs)
u32 l;
l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
- l &= ~(1 << 6); /* CSVALID */
+ l &= ~GPMC_CONFIG7_CSVALID;
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG7, l);
}
@@ -290,7 +317,7 @@ static int gpmc_cs_mem_enabled(int cs)
u32 l;
l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG7);
- return l & (1 << 6);
+ return l & GPMC_CONFIG7_CSVALID;
}
int gpmc_cs_set_reserved(int cs, int reserved)
@@ -366,7 +393,7 @@ int gpmc_cs_request(int cs, unsigned long size, unsigned long *base)
if (r < 0)
goto out;
- gpmc_cs_enable_mem(cs, res->start, res->end - res->start + 1);
+ gpmc_cs_enable_mem(cs, res->start, resource_size(res));
*base = res->start;
gpmc_cs_set_reserved(cs, 1);
out:
@@ -378,7 +405,7 @@ EXPORT_SYMBOL(gpmc_cs_request);
void gpmc_cs_free(int cs)
{
spin_lock(&gpmc_mem_lock);
- if (cs >= GPMC_CS_NUM || !gpmc_cs_reserved(cs)) {
+ if (cs >= GPMC_CS_NUM || cs < 0 || !gpmc_cs_reserved(cs)) {
printk(KERN_ERR "Trying to free non-reserved GPMC CS%d\n", cs);
BUG();
spin_unlock(&gpmc_mem_lock);
@@ -516,3 +543,68 @@ void __init gpmc_init(void)
gpmc_write_reg(GPMC_SYSCONFIG, l);
gpmc_mem_init();
}
+
+#ifdef CONFIG_ARCH_OMAP3
+static struct omap3_gpmc_regs gpmc_context;
+
+void omap3_gpmc_save_context()
+{
+ int i;
+ gpmc_context.sysconfig = gpmc_read_reg(GPMC_SYSCONFIG);
+ gpmc_context.irqenable = gpmc_read_reg(GPMC_IRQENABLE);
+ gpmc_context.timeout_ctrl = gpmc_read_reg(GPMC_TIMEOUT_CONTROL);
+ gpmc_context.config = gpmc_read_reg(GPMC_CONFIG);
+ gpmc_context.prefetch_config1 = gpmc_read_reg(GPMC_PREFETCH_CONFIG1);
+ gpmc_context.prefetch_config2 = gpmc_read_reg(GPMC_PREFETCH_CONFIG2);
+ gpmc_context.prefetch_control = gpmc_read_reg(GPMC_PREFETCH_CONTROL);
+ for (i = 0; i < GPMC_CS_NUM; i++) {
+ gpmc_context.cs_context[i].is_valid = gpmc_cs_mem_enabled(i);
+ if (gpmc_context.cs_context[i].is_valid) {
+ gpmc_context.cs_context[i].config1 =
+ gpmc_cs_read_reg(i, GPMC_CS_CONFIG1);
+ gpmc_context.cs_context[i].config2 =
+ gpmc_cs_read_reg(i, GPMC_CS_CONFIG2);
+ gpmc_context.cs_context[i].config3 =
+ gpmc_cs_read_reg(i, GPMC_CS_CONFIG3);
+ gpmc_context.cs_context[i].config4 =
+ gpmc_cs_read_reg(i, GPMC_CS_CONFIG4);
+ gpmc_context.cs_context[i].config5 =
+ gpmc_cs_read_reg(i, GPMC_CS_CONFIG5);
+ gpmc_context.cs_context[i].config6 =
+ gpmc_cs_read_reg(i, GPMC_CS_CONFIG6);
+ gpmc_context.cs_context[i].config7 =
+ gpmc_cs_read_reg(i, GPMC_CS_CONFIG7);
+ }
+ }
+}
+
+void omap3_gpmc_restore_context()
+{
+ int i;
+ gpmc_write_reg(GPMC_SYSCONFIG, gpmc_context.sysconfig);
+ gpmc_write_reg(GPMC_IRQENABLE, gpmc_context.irqenable);
+ gpmc_write_reg(GPMC_TIMEOUT_CONTROL, gpmc_context.timeout_ctrl);
+ gpmc_write_reg(GPMC_CONFIG, gpmc_context.config);
+ gpmc_write_reg(GPMC_PREFETCH_CONFIG1, gpmc_context.prefetch_config1);
+ gpmc_write_reg(GPMC_PREFETCH_CONFIG2, gpmc_context.prefetch_config2);
+ gpmc_write_reg(GPMC_PREFETCH_CONTROL, gpmc_context.prefetch_control);
+ for (i = 0; i < GPMC_CS_NUM; i++) {
+ if (gpmc_context.cs_context[i].is_valid) {
+ gpmc_cs_write_reg(i, GPMC_CS_CONFIG1,
+ gpmc_context.cs_context[i].config1);
+ gpmc_cs_write_reg(i, GPMC_CS_CONFIG2,
+ gpmc_context.cs_context[i].config2);
+ gpmc_cs_write_reg(i, GPMC_CS_CONFIG3,
+ gpmc_context.cs_context[i].config3);
+ gpmc_cs_write_reg(i, GPMC_CS_CONFIG4,
+ gpmc_context.cs_context[i].config4);
+ gpmc_cs_write_reg(i, GPMC_CS_CONFIG5,
+ gpmc_context.cs_context[i].config5);
+ gpmc_cs_write_reg(i, GPMC_CS_CONFIG6,
+ gpmc_context.cs_context[i].config6);
+ gpmc_cs_write_reg(i, GPMC_CS_CONFIG7,
+ gpmc_context.cs_context[i].config7);
+ }
+ }
+}
+#endif /* CONFIG_ARCH_OMAP3 */