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arm: Tegra: Use ODMDATA from BCT in IRAM

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Walk the BIT and BCT to find the ODMDATA word in the
CustomerData field and put it into Scratch20 reg for
use by kernel, etc.

Built all Tegra builds OK; Booted on Seaboard and saw
ODMDATA in PMC scratch20 was the same as the value in my
burn-u-boot.sh file (0x300D8011). NOTE: All flash utilities
will have to specify the odmdata (nvflash --odmdata n) on
the command line or via a cfg file, or built in to their
BCT.

Signed-off-by: Tom Warren <twarren@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
This commit is contained in:
Tom Warren
2012-05-30 14:06:09 -07:00
committed by Albert ARIBAUD
parent f9f2f12e2c
commit 76e350b7a3
10 changed files with 25 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
arch/arm/cpu/armv7/tegra2/ap20.c
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@@ -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 */