From d96796ca23b2ebcb7ce58c250e5a44152a652a45 Mon Sep 17 00:00:00 2001
From: Diego Dorta <diego.dorta@nxp.com>
Date: Tue, 11 Oct 2016 11:09:27 -0300
Subject: mx6sabresd: Add Falcon mode support

Allow i.MX6Q Sabre SD to load the kernel and dtb via SPL in Falcon mode.

Based on the Falcon mode code for MX6 Gateworks Ventana board.

Signed-off-by: Diego Dorta <diego.dorta@nxp.com>

diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c
index e58c03c..2b6d7be 100644
--- a/board/freescale/mx6sabresd/mx6sabresd.c
+++ b/board/freescale/mx6sabresd/mx6sabresd.c
@@ -57,6 +57,8 @@ DECLARE_GLOBAL_DATA_PTR;
 
 #define DISP0_PWR_EN	IMX_GPIO_NR(1, 21)
 
+#define KEY_VOL_UP	IMX_GPIO_NR(1, 4)
+
 int dram_init(void)
 {
 	gd->ram_size = imx_ddr_size();
@@ -682,6 +684,16 @@ int checkboard(void)
 #include <spl.h>
 #include <libfdt.h>
 
+#ifdef CONFIG_SPL_OS_BOOT
+int spl_start_uboot(void)
+{
+	gpio_direction_input(KEY_VOL_UP);
+
+	/* Only enter in Falcon mode if KEY_VOL_UP is pressed */
+	return gpio_get_value(KEY_VOL_UP);
+}
+#endif
+
 static void ccgr_init(void)
 {
 	struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
diff --git a/include/configs/mx6sabresd.h b/include/configs/mx6sabresd.h
index 5c2734d..6a7a0d3 100644
--- a/include/configs/mx6sabresd.h
+++ b/include/configs/mx6sabresd.h
@@ -11,6 +11,7 @@
 
 #ifdef CONFIG_SPL
 #include "imx6_spl.h"
+#undef CONFIG_SPL_EXT_SUPPORT
 #endif
 
 #define CONFIG_MACH_TYPE	3980
@@ -22,6 +23,17 @@
 
 #include "mx6sabre_common.h"
 
+/* Falcon Mode */
+#define CONFIG_CMD_SPL
+#define CONFIG_SPL_OS_BOOT
+#define CONFIG_SYS_SPL_ARGS_ADDR       0x18000000
+#define CONFIG_CMD_SPL_WRITE_SIZE      (128 * SZ_1K)
+
+/* Falcon Mode - MMC support: args@1MB kernel@2MB */
+#define CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTOR  0x800   /* 1MB */
+#define CONFIG_SYS_MMCSD_RAW_MODE_ARGS_SECTORS (CONFIG_CMD_SPL_WRITE_SIZE / 512)
+#define CONFIG_SYS_MMCSD_RAW_MODE_KERNEL_SECTOR        0x1000  /* 2MB */
+
 #define CONFIG_SYS_FSL_USDHC_NUM	3
 #if defined(CONFIG_ENV_IS_IN_MMC)
 #define CONFIG_SYS_MMC_ENV_DEV		1	/* SDHC3 */
-- 
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