From 36e9370f30bd173879958d164156997841ec4e9c Mon Sep 17 00:00:00 2001
From: Hung-Te Lin <hungte@chromium.org>
Date: Thu, 24 Oct 2013 22:35:32 +0800
Subject: [PATCH] tegra124: Assign console address for kernel.

Linux tegra124 kernel uses pmc.odmdata to figure out serial console type &
address, which was defined by BCT in U-Boot world.

For Coreboot, we should build that value by Kconfig values. But since we don't
have a complete support for BCT & ODMDATA values yet, let's follow the values
defined in bct/odmdata.cfg.

BUG=none
TEST=emerge-nyan chromeos-coreboot-nyan; boot # see linux kernel messages.
BRANCH=none

Change-Id: I95e8473df840cb9f55259670add9e99cebde4dee
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/174486
---
 src/mainboard/google/nyan/mainboard.c | 16 ++++++++++++++++
 src/soc/nvidia/tegra124/pmc.h         |  4 +++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/src/mainboard/google/nyan/mainboard.c b/src/mainboard/google/nyan/mainboard.c
index 368440dc63..ccc6f12e97 100644
--- a/src/mainboard/google/nyan/mainboard.c
+++ b/src/mainboard/google/nyan/mainboard.c
@@ -17,9 +17,12 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+#include <arch/io.h>
 #include <device/device.h>
 #include <boot/coreboot_tables.h>
+#include <soc/addressmap.h>
 #include <soc/nvidia/tegra124/gpio.h>
+#include <soc/nvidia/tegra124/pmc.h>
 
 static void setup_pinmux(void)
 {
@@ -107,9 +110,22 @@ static void setup_pinmux(void)
 			  PINMUX_SDMMC4_DAT7_FUNC_SDMMC4 | pin_up);
 }
 
+static void setup_kernel_info(void)
+{
+	// Setup required information for Linux kernel.
+
+	// pmc.odmdata: [18:19]: console type, [15:17]: UART id.
+	// TODO(hungte) This should be done by filling BCT values, or derived
+	// from CONFIG_CONSOLE_SERIAL_UART[A-E]. Right now we simply copy the
+	// value defined in BCT.
+	struct tegra_pmc_regs *pmc = (void*)TEGRA_PMC_BASE;
+	writel(0x80080000, &pmc->odmdata);
+}
+
 static void mainboard_init(device_t dev)
 {
 	setup_pinmux();
+	setup_kernel_info();
 }
 
 static void mainboard_enable(device_t dev)
diff --git a/src/soc/nvidia/tegra124/pmc.h b/src/soc/nvidia/tegra124/pmc.h
index 1134abd5df..c2e4f4d890 100644
--- a/src/soc/nvidia/tegra124/pmc.h
+++ b/src/soc/nvidia/tegra124/pmc.h
@@ -62,7 +62,9 @@ struct tegra_pmc_regs {
 	u32 no_iopower;
 	u32 pwr_det;
 	u32 pwr_det_latch;
-	u32 scratch[24];
+	u32 scratch[20];
+	u32 odmdata;
+	u32 scratch21[24 - 21];
 	u32 secure_scratch[6];
 	u32 cpupwrgood_timer;
 	u32 cpupwroff_timer;