Patch set updated for coreboot: edf2ec7 tegra132: Store ODMDATA from BCT into PMC scratch for use by kernel

[Aaron Durbin]

Aaron Durbin ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/9257

-gerrit

commit edf2ec759a2f908495e6e88e8f90332fc4bc060b
Author: Tom Warren 
Date:   Thu Oct 9 16:01:33 2014 -0700

tegra132: Store ODMDATA from BCT into PMC scratch for use by kernel

In able to do earlyprintk spew on LP0 resume, the kernel needs to
    know the board UART. ODMDATA (in bct/odmdata.cfg) contains this info,
    and the kernel looks for it in PMC_SCRATCH20. Fetch the ODMDATA word
    from the BCT copy stored in IRAM by the BootROM.

BUG=chrome-os-partner:32015
    BRANCH=none
    TEST=Built for Rush and Ryu OK. Dumped PMC_SCRATCH20 in TegraShell
    on Rush and confirmed value is what's in odmdata.cfg.

Original-Change-Id: I63f33558ee8b00bd6c1e313efcd531e1d5fc67eb
    Original-Signed-off-by: Tom Warren 
    Original-Reviewed-on: https://chromium-review.googlesource.com/222402
    Original-Reviewed-by: Aaron Durbin

(cherry picked from commit 3f6a21afdb81f7d2ae90119c563535b4c87c9ade)
    Signed-off-by: Aaron Durbin

Change-Id: I9819ffdf0f7618f0dd8dc50f81b5b26d6f94bfbd
---
 src/soc/nvidia/tegra132/bootblock.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/src/soc/nvidia/tegra132/bootblock.c b/src/soc/nvidia/tegra132/bootblock.c
index 6481eb3..6f25050 100644
--- a/src/soc/nvidia/tegra132/bootblock.c
+++ b/src/soc/nvidia/tegra132/bootblock.c
@@ -29,6 +29,29 @@

#include "power.h"

+#define BCT_OFFSET_IN_BIT	0x50
+#define ODMDATA_OFFSET_IN_BCT	0x6A8
+#define TEGRA_SRAM_MAX		(TEGRA_SRAM_BASE + TEGRA_SRAM_SIZE)
+
+static void save_odmdata(void)
+{
+	struct tegra_pmc_regs *pmc = (struct tegra_pmc_regs*)TEGRA_PMC_BASE;
+	uintptr_t bct_offset;
+	u32 odmdata;
+
+	// pmc.odmdata: [18:19]: console type, [15:17]: UART id.
+	// TODO(twarren) ODMDATA is stored in the BCT, from bct/odmdata.cfg.
+	// I use the BCT offset in the BIT in SRAM to locate the BCT, and
+	// pick up the ODMDATA word at BCT offset 0x6A8. I could use a BCT
+	// struct header from cbootimage, but it seems like overkill for this.
+
+	bct_offset = read32((void *)(TEGRA_SRAM_BASE + BCT_OFFSET_IN_BIT));
+	if (bct_offset > TEGRA_SRAM_BASE && bct_offset < TEGRA_SRAM_MAX) {
+		odmdata = read32((void *)(bct_offset + ODMDATA_OFFSET_IN_BCT));
+		write32(odmdata, &pmc->odmdata);
+	}
+}
+
 void __attribute__((weak)) bootblock_mainboard_early_init(void)
 {
    /* Empty default implementation. */
@@ -52,6 +75,9 @@ void main(void)
    			 CLK_H_APBDMA,
    			 0, CLK_V_MSELECT, 0, 0);

+	/* Find ODMDATA in IRAM and save it to scratch reg */
+	save_odmdata();
+
    bootblock_mainboard_early_init();

if (CONFIG_BOOTBLOCK_CONSOLE) {