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Diffstat (limited to 'arch/arm/mach-tegra/fuse.c')
-rw-r--r--arch/arm/mach-tegra/fuse.c52
1 files changed, 39 insertions, 13 deletions
diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c
index 0b7db174a5de..8121742711fe 100644
--- a/arch/arm/mach-tegra/fuse.c
+++ b/arch/arm/mach-tegra/fuse.c
@@ -21,22 +21,28 @@
#include <linux/io.h>
#include <linux/export.h>
-#include <mach/iomap.h>
-
#include "fuse.h"
+#include "iomap.h"
#include "apbio.h"
#define FUSE_UID_LOW 0x108
#define FUSE_UID_HIGH 0x10c
#define FUSE_SKU_INFO 0x110
-#define FUSE_SPARE_BIT 0x200
+
+#define TEGRA20_FUSE_SPARE_BIT 0x200
+#define TEGRA30_FUSE_SPARE_BIT 0x244
int tegra_sku_id;
int tegra_cpu_process_id;
int tegra_core_process_id;
int tegra_chip_id;
+int tegra_cpu_speedo_id; /* only exist in Tegra30 and later */
+int tegra_soc_speedo_id;
enum tegra_revision tegra_revision;
+static int tegra_fuse_spare_bit;
+static void (*tegra_init_speedo_data)(void);
+
/* The BCT to use at boot is specified by board straps that can be read
* through a APB misc register and decoded. 2 bits, i.e. 4 possible BCTs.
*/
@@ -57,14 +63,14 @@ static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
[TEGRA_REVISION_A04] = "A04",
};
-static inline u32 tegra_fuse_readl(unsigned long offset)
+u32 tegra_fuse_readl(unsigned long offset)
{
return tegra_apb_readl(TEGRA_FUSE_BASE + offset);
}
-static inline bool get_spare_fuse(int bit)
+bool tegra_spare_fuse(int bit)
{
- return tegra_fuse_readl(FUSE_SPARE_BIT + bit * 4);
+ return tegra_fuse_readl(tegra_fuse_spare_bit + bit * 4);
}
static enum tegra_revision tegra_get_revision(u32 id)
@@ -78,7 +84,7 @@ static enum tegra_revision tegra_get_revision(u32 id)
return TEGRA_REVISION_A02;
case 3:
if (tegra_chip_id == TEGRA20 &&
- (get_spare_fuse(18) || get_spare_fuse(19)))
+ (tegra_spare_fuse(18) || tegra_spare_fuse(19)))
return TEGRA_REVISION_A03p;
else
return TEGRA_REVISION_A03;
@@ -89,6 +95,16 @@ static enum tegra_revision tegra_get_revision(u32 id)
}
}
+static void tegra_get_process_id(void)
+{
+ u32 reg;
+
+ reg = tegra_fuse_readl(tegra_fuse_spare_bit);
+ tegra_cpu_process_id = (reg >> 6) & 3;
+ reg = tegra_fuse_readl(tegra_fuse_spare_bit);
+ tegra_core_process_id = (reg >> 12) & 3;
+}
+
void tegra_init_fuse(void)
{
u32 id;
@@ -100,19 +116,29 @@ void tegra_init_fuse(void)
reg = tegra_fuse_readl(FUSE_SKU_INFO);
tegra_sku_id = reg & 0xFF;
- reg = tegra_fuse_readl(FUSE_SPARE_BIT);
- tegra_cpu_process_id = (reg >> 6) & 3;
-
- reg = tegra_fuse_readl(FUSE_SPARE_BIT);
- tegra_core_process_id = (reg >> 12) & 3;
-
reg = tegra_apb_readl(TEGRA_APB_MISC_BASE + STRAP_OPT);
tegra_bct_strapping = (reg & RAM_ID_MASK) >> RAM_CODE_SHIFT;
id = readl_relaxed(IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804);
tegra_chip_id = (id >> 8) & 0xff;
+ switch (tegra_chip_id) {
+ case TEGRA20:
+ tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
+ tegra_init_speedo_data = &tegra20_init_speedo_data;
+ break;
+ case TEGRA30:
+ tegra_fuse_spare_bit = TEGRA30_FUSE_SPARE_BIT;
+ tegra_init_speedo_data = &tegra30_init_speedo_data;
+ break;
+ default:
+ pr_warn("Tegra: unknown chip id %d\n", tegra_chip_id);
+ tegra_fuse_spare_bit = TEGRA20_FUSE_SPARE_BIT;
+ tegra_init_speedo_data = &tegra_get_process_id;
+ }
+
tegra_revision = tegra_get_revision(id);
+ tegra_init_speedo_data();
pr_info("Tegra Revision: %s SKU: %d CPU Process: %d Core Process: %d\n",
tegra_revision_name[tegra_revision],