[coreboot-gerrit] New patch to review for coreboot: d6413a8 Snow: Set up the ChromeOS GPIOs as inputs during the ROM stage.
Gabe Black (gabeblack@chromium.org)
gerrit at coreboot.org
Thu Apr 11 00:11:38 CEST 2013
Gabe Black (gabeblack at chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3067
-gerrit
commit d6413a8a7ca52d9830d18152957175d39a7e2518
Author: Gabe Black <gabeblack at chromium.org>
Date: Wed Apr 10 14:34:57 2013 -0700
Snow: Set up the ChromeOS GPIOs as inputs during the ROM stage.
We need these to be inputs so they can be read when populating the coreboot
tables. It seems like a good idea to do this early to ensure that the input
gate capacitance has had a chance to charge, and if we decide to use
actually use that information during the ROM stage to do earlier RW
firmware selection.
It is not guarded by a ChromeOS config variable because those lines are
always intended to be input GPIOs, regardless of whether we're running
ChromeOS or not.
Change-Id: Id76008931b5081253737c6676980a1bdb476ac09
Signed-off-by: Gabe Black <gabeblack at chromium.org>
---
src/mainboard/google/snow/romstage.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/src/mainboard/google/snow/romstage.c b/src/mainboard/google/snow/romstage.c
index d34c379..7a26ed9 100644
--- a/src/mainboard/google/snow/romstage.c
+++ b/src/mainboard/google/snow/romstage.c
@@ -27,6 +27,7 @@
#include <arch/gpio.h>
#include <cpu/samsung/exynos5-common/i2c.h>
#include <cpu/samsung/exynos5250/clk.h>
+#include <cpu/samsung/exynos5250/cpu.h>
#include <cpu/samsung/exynos5250/dmc.h>
#include <cpu/samsung/exynos5250/gpio.h>
#include <cpu/samsung/exynos5250/setup.h>
@@ -118,6 +119,31 @@ static void graphics(void)
exynos_pinmux_config(PERIPH_ID_DPHPD, 0);
}
+static void chromeos_gpios(void)
+{
+ struct exynos5_gpio_part1 *gpio_pt1;
+ struct exynos5_gpio_part2 *gpio_pt2;
+
+ enum {
+ WP_GPIO = 6,
+ FORCE_RECOVERY_MODE = 0,
+ LID_OPEN = 5
+ };
+
+ gpio_pt1 = (struct exynos5_gpio_part1 *)EXYNOS5_GPIO_PART1_BASE;
+ gpio_pt2 = (struct exynos5_gpio_part2 *)EXYNOS5_GPIO_PART2_BASE;
+
+ s5p_gpio_direction_input(&gpio_pt1->d1, WP_GPIO);
+ s5p_gpio_set_pull(&gpio_pt1->d1, WP_GPIO, EXYNOS_GPIO_PULL_NONE);
+
+ s5p_gpio_direction_input(&gpio_pt1->y1, FORCE_RECOVERY_MODE);
+ s5p_gpio_set_pull(&gpio_pt1->y1, FORCE_RECOVERY_MODE,
+ EXYNOS_GPIO_PULL_NONE);
+
+ s5p_gpio_direction_input(&gpio_pt2->x3, LID_OPEN);
+ s5p_gpio_set_pull(&gpio_pt2->x3, LID_OPEN, EXYNOS_GPIO_PULL_NONE);
+}
+
void main(void)
{
struct mem_timings *mem;
@@ -161,6 +187,8 @@ void main(void)
initialize_s5p_mshc();
+ chromeos_gpios();
+
graphics();
entry = cbfs_load_stage(CBFS_DEFAULT_MEDIA, "fallback/coreboot_ram");
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