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-rw-r--r--arch/arm/mach-tegra/fuse.c85
1 files changed, 58 insertions, 27 deletions
diff --git a/arch/arm/mach-tegra/fuse.c b/arch/arm/mach-tegra/fuse.c
index daf3f572acc..b1895c53ed6 100644
--- a/arch/arm/mach-tegra/fuse.c
+++ b/arch/arm/mach-tegra/fuse.c
@@ -30,20 +30,75 @@
#define FUSE_SKU_INFO 0x110
#define FUSE_SPARE_BIT 0x200
+int tegra_sku_id;
+int tegra_cpu_process_id;
+int tegra_core_process_id;
+enum tegra_revision tegra_revision;
+
+static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
+ [TEGRA_REVISION_UNKNOWN] = "unknown",
+ [TEGRA_REVISION_A01] = "A01",
+ [TEGRA_REVISION_A02] = "A02",
+ [TEGRA_REVISION_A03] = "A03",
+ [TEGRA_REVISION_A03p] = "A03 prime",
+ [TEGRA_REVISION_A04] = "A04",
+};
+
static inline u32 tegra_fuse_readl(unsigned long offset)
{
return tegra_apb_readl(TEGRA_FUSE_BASE + offset);
}
+static inline bool get_spare_fuse(int bit)
+{
+ return tegra_fuse_readl(FUSE_SPARE_BIT + bit * 4);
+}
+
+static enum tegra_revision tegra_get_revision(void)
+{
+ void __iomem *chip_id = IO_ADDRESS(TEGRA_APB_MISC_BASE) + 0x804;
+ u32 id = readl(chip_id);
+ u32 minor_rev = (id >> 16) & 0xf;
+ u32 chipid = (id >> 8) & 0xff;
+
+ switch (minor_rev) {
+ case 1:
+ return TEGRA_REVISION_A01;
+ case 2:
+ return TEGRA_REVISION_A02;
+ case 3:
+ if (chipid == 0x20 && (get_spare_fuse(18) || get_spare_fuse(19)))
+ return TEGRA_REVISION_A03p;
+ else
+ return TEGRA_REVISION_A03;
+ case 4:
+ return TEGRA_REVISION_A04;
+ default:
+ return TEGRA_REVISION_UNKNOWN;
+ }
+}
+
void tegra_init_fuse(void)
{
u32 reg = readl(IO_TO_VIRT(TEGRA_CLK_RESET_BASE + 0x48));
reg |= 1 << 28;
writel(reg, IO_TO_VIRT(TEGRA_CLK_RESET_BASE + 0x48));
- pr_info("Tegra SKU: %d CPU Process: %d Core Process: %d\n",
- tegra_sku_id(), tegra_cpu_process_id(),
- tegra_core_process_id());
+ 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;
+
+ tegra_revision = tegra_get_revision();
+
+ pr_info("Tegra Revision: %s SKU: %d CPU Process: %d Core Process: %d\n",
+ tegra_revision_name[tegra_get_revision()],
+ tegra_sku_id, tegra_cpu_process_id,
+ tegra_core_process_id);
}
unsigned long long tegra_chip_uid(void)
@@ -54,27 +109,3 @@ unsigned long long tegra_chip_uid(void)
hi = tegra_fuse_readl(FUSE_UID_HIGH);
return (hi << 32ull) | lo;
}
-
-int tegra_sku_id(void)
-{
- int sku_id;
- u32 reg = tegra_fuse_readl(FUSE_SKU_INFO);
- sku_id = reg & 0xFF;
- return sku_id;
-}
-
-int tegra_cpu_process_id(void)
-{
- int cpu_process_id;
- u32 reg = tegra_fuse_readl(FUSE_SPARE_BIT);
- cpu_process_id = (reg >> 6) & 3;
- return cpu_process_id;
-}
-
-int tegra_core_process_id(void)
-{
- int core_process_id;
- u32 reg = tegra_fuse_readl(FUSE_SPARE_BIT);
- core_process_id = (reg >> 12) & 3;
- return core_process_id;
-}