From d48d1dcc88df0c1bd4c50f14dd2e7cd1dd4fba5d Mon Sep 17 00:00:00 2001
From: Vadim Bendebury <vbendeb@chromium.org>
Date: Fri, 1 Aug 2014 17:36:45 -0700
Subject: [PATCH] storm: supply vboot GPIO settings in coreboot table

Storm provides three real and two fake gpios. To keep things simple,
define them all as active low and provide appropriate values for the
fake ones.

BUG=chrome-os-partner:30705
TEST=with the appropriate depthcharge change booted proto0, observed
     appropriate behavior following the dev switch setting

Change-Id: Icb7fb55949fa97ead9d19f0da76392ee63bbb5b8
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/210922
---
 src/mainboard/google/storm/Kconfig     |  1 +
 src/mainboard/google/storm/mainboard.c | 52 ++++++++++++++++++++++++++
 2 files changed, 53 insertions(+)

diff --git a/src/mainboard/google/storm/Kconfig b/src/mainboard/google/storm/Kconfig
index 903e8ae7da..b6baef1f3a 100644
--- a/src/mainboard/google/storm/Kconfig
+++ b/src/mainboard/google/storm/Kconfig
@@ -22,6 +22,7 @@ if BOARD_GOOGLE_STORM
 config BOARD_SPECIFIC_OPTIONS
 	def_bool y
 	select BOARD_ID_SUPPORT
+	select CHROMEOS
 	select COMMON_CBFS_SPI_WRAPPER
 	select MAINBOARD_HAS_BOOTBLOCK_INIT
 	select SOC_QC_IPQ806X
diff --git a/src/mainboard/google/storm/mainboard.c b/src/mainboard/google/storm/mainboard.c
index 94f3a92215..442e9e9581 100644
--- a/src/mainboard/google/storm/mainboard.c
+++ b/src/mainboard/google/storm/mainboard.c
@@ -19,7 +19,11 @@
 
 #include <arch/cache.h>
 #include <boot/coreboot_tables.h>
+#include <console/console.h>
 #include <device/device.h>
+#include <delay.h>
+#include <string.h>
+
 #include <soc/qualcomm/ipq806x/include/clock.h>
 #include <soc/qualcomm/ipq806x/include/gpio.h>
 #include <soc/qualcomm/ipq806x/include/usb.h>
@@ -93,3 +97,51 @@ void lb_board(struct lb_header *header)
 	dma->range_start = CONFIG_DRAM_DMA_START;
 	dma->range_size = CONFIG_DRAM_DMA_SIZE;
 }
+
+#define FAKE_GPIO_NUM		-1
+
+struct gpio_desc {
+	gpio_t gpio_num;
+	const char *gpio_name;
+	uint32_t fake_value;
+};
+
+static const struct gpio_desc descriptors[] = {
+	{ 15, "developer" },
+	{ 16, "recovery" },
+	{ 17, "write protect" },
+	{ FAKE_GPIO_NUM, "power", 1 },	/* Power never pressed. */
+	{ FAKE_GPIO_NUM, "lid", 0 }	/* Lid always open. */
+};
+
+static void fill_lb_gpio(struct lb_gpio *pgpio, const struct gpio_desc *pdesc)
+{
+	gpio_t gpio_num = pdesc->gpio_num;
+
+	pgpio->port = gpio_num;
+	if (gpio_num == FAKE_GPIO_NUM) {
+		pgpio->value = pdesc->fake_value;
+	} else {
+		gpio_tlmm_config_set(gpio_num, GPIO_FUNC_DISABLE,
+				     GPIO_NO_PULL, GPIO_2MA, GPIO_DISABLE);
+		udelay(10); /* Should be enough to settle. */
+		pgpio->value = gpio_get_in_value(gpio_num);
+	}
+	pgpio->polarity = ACTIVE_LOW;
+	strncpy((char *)pgpio->name, pdesc->gpio_name, sizeof(pgpio->name));
+
+	printk(BIOS_INFO, "%s: %s: port %d value %d\n",
+	       __func__, pgpio->name, pgpio->port, pgpio->value);
+}
+
+void fill_lb_gpios(struct lb_gpios *gpios)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(descriptors); i++)
+		fill_lb_gpio(gpios->gpios + i, descriptors + i);
+
+
+	gpios->size = sizeof(*gpios) + sizeof(struct lb_gpio) * i;
+	gpios->count = i;
+}