imx: ventana: config: enable Falcon mode

Falcon mode entails the SPL booting the OS directly instead of U-Boot.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>

board/gateworks/gw_ventana/gw_ventana_spl.c

@@ -14,6 +14,7 @@
 #include <asm/imx-common/boot_mode.h>
 #include <asm/imx-common/iomux-v3.h>
 #include <asm/imx-common/mxc_i2c.h>
+#include <environment.h>
 #include <spl.h>
 
 #include "gsc.h"
@@ -556,6 +557,25 @@ void spl_board_init(void)
 	setup_pmic();
 }
 
+#ifdef CONFIG_SPL_OS_BOOT
+/* return 1 if we wish to boot to uboot vs os (falcon mode) */
+int spl_start_uboot(void)
+{
+	int ret = 1;
+
+	debug("%s\n", __func__);
+#ifdef CONFIG_SPL_ENV_SUPPORT
+	env_init();
+	env_relocate_spec();
+	debug("boot_os=%s\n", getenv("boot_os"));
+	if (getenv_yesno("boot_os") == 1)
+		ret = 0;
+#endif
+	debug("%s booting %s\n", __func__, ret ? "uboot" : "linux");
+	return ret;
+}
+#endif
+
 void reset_cpu(ulong addr)
 {
 }

include/configs/gw_ventana.h

@@ -17,6 +17,22 @@
 /* Location in NAND to read U-Boot from */
 #define CONFIG_SYS_NAND_U_BOOT_OFFS     (14 * SZ_1M)
 
+/* Falcon Mode */
+#define CONFIG_CMD_SPL
+#define CONFIG_SPL_OS_BOOT
+#define CONFIG_SPL_ENV_SUPPORT
+#define CONFIG_SYS_SPL_ARGS_ADDR	0x18000000
+#define CONFIG_CMD_SPL_WRITE_SIZE	(128 * SZ_1K)
+
+/* Falcon Mode - NAND support: args@17MB kernel@18MB */
+#define CONFIG_CMD_SPL_NAND_OFS		(17 * SZ_1M)
+#define CONFIG_SYS_NAND_SPL_KERNEL_OFFS	(18 * SZ_1M)
+
+/* 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 */
+
 #include "imx6_spl.h"                  /* common IMX6 SPL configuration */
 #include "mx6_common.h"
 #define CONFIG_MX6