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-rw-r--r--arch/arm/cpu/armv7/tegra2/ap20.c22
-rw-r--r--arch/arm/include/asm/arch-tegra2/tegra2.h4
2 files changed, 25 insertions, 1 deletions
diff --git a/arch/arm/cpu/armv7/tegra2/ap20.c b/arch/arm/cpu/armv7/tegra2/ap20.c
index 24e582d..1aad387 100644
--- a/arch/arm/cpu/armv7/tegra2/ap20.c
+++ b/arch/arm/cpu/armv7/tegra2/ap20.c
@@ -314,9 +314,28 @@ void enable_scu(void)
writel(reg, &scu->scu_ctrl);
}
+static u32 get_odmdata(void)
+{
+ /*
+ * ODMDATA is stored in the BCT in IRAM by the BootROM.
+ * The BCT start and size are stored in the BIT in IRAM.
+ * Read the data @ bct_start + (bct_size - 12). This works
+ * on T20 and T30 BCTs, which are locked down. If this changes
+ * in new chips (T114, etc.), we can revisit this algorithm.
+ */
+
+ u32 bct_start, odmdata;
+
+ bct_start = readl(AP20_BASE_PA_SRAM + NVBOOTINFOTABLE_BCTPTR);
+ odmdata = readl(bct_start + BCT_ODMDATA_OFFSET);
+
+ return odmdata;
+}
+
void init_pmc_scratch(void)
{
struct pmc_ctlr *const pmc = (struct pmc_ctlr *)TEGRA2_PMC_BASE;
+ u32 odmdata;
int i;
/* SCRATCH0 is initialized by the boot ROM and shouldn't be cleared */
@@ -324,7 +343,8 @@ void init_pmc_scratch(void)
writel(0, &pmc->pmc_scratch1+i);
/* ODMDATA is for kernel use to determine RAM size, LP config, etc. */
- writel(CONFIG_SYS_BOARD_ODMDATA, &pmc->pmc_scratch20);
+ odmdata = get_odmdata();
+ writel(odmdata, &pmc->pmc_scratch20);
#ifdef CONFIG_TEGRA2_LP0
/* save Sdram params to PMC 2, 4, and 24 for WB0 */
diff --git a/arch/arm/include/asm/arch-tegra2/tegra2.h b/arch/arm/include/asm/arch-tegra2/tegra2.h
index d4ada10..3c8d8a8 100644
--- a/arch/arm/include/asm/arch-tegra2/tegra2.h
+++ b/arch/arm/include/asm/arch-tegra2/tegra2.h
@@ -60,6 +60,10 @@ struct timerus {
/* Address at which WB code runs, it must not overlap Bootrom's IRAM usage */
#define AP20_WB_RUN_ADDRESS 0x40020000
+#define NVBOOTINFOTABLE_BCTSIZE 0x38 /* BCT size in BIT in IRAM */
+#define NVBOOTINFOTABLE_BCTPTR 0x3C /* BCT pointer in BIT in IRAM */
+#define BCT_ODMDATA_OFFSET 4068 /* 12 bytes from end of BCT */
+
/* These are the available SKUs (product types) for Tegra */
enum {
SKU_ID_T20 = 0x8,