[U-Boot] [PATCH 09/16] pico-imx7d: Add Falcon mode support

[Otavio Salvador]

From: Fabio Estevam <festevam at gmail.com>

Falcon mode boots the kernel directly from SPL, without loading
the full U-Boot.

As pico-imx7d does not have a GPIO for selecting Falcon versus
normal mode, enter in Falcon mode when the customer selects
the CONFIG_SPL_OS_BOOT option in menuconfig.

Signed-off-by: Fabio Estevam <festevam at gmail.com>
Signed-off-by: Otavio Salvador <otavio at ossystems.com.br>
---

 board/technexion/pico-imx7d/spl.c |  8 ++++++++
 configs/pico-imx7d_defconfig      |  2 ++
 include/configs/pico-imx7d.h      | 12 ++++++++++++
 3 files changed, 22 insertions(+)

diff --git a/board/technexion/pico-imx7d/spl.c b/board/technexion/pico-imx7d/spl.c
index 14d96cb0c5..a5463ee68b 100644
--- a/board/technexion/pico-imx7d/spl.c
+++ b/board/technexion/pico-imx7d/spl.c
@@ -13,6 +13,14 @@
 #include <spl.h>
 
 #if defined(CONFIG_SPL_BUILD)
+
+#ifdef CONFIG_SPL_OS_BOOT
+int spl_start_uboot(void)
+{
+	return 0;
+}
+#endif
+
 static struct ddrc ddrc_regs_val = {
 	.mstr		= 0x01040001,
 	.rfshtmg	= 0x00400046,
diff --git a/configs/pico-imx7d_defconfig b/configs/pico-imx7d_defconfig
index 3eb26c75d6..6ea49fdee2 100644
--- a/configs/pico-imx7d_defconfig
+++ b/configs/pico-imx7d_defconfig
@@ -21,6 +21,8 @@ CONFIG_SPL_USB_SDP_SUPPORT=y
 CONFIG_CMD_BOOTMENU=y
 # CONFIG_CMD_IMI is not set
 # CONFIG_CMD_XIMG is not set
+CONFIG_CMD_SPL=y
+CONFIG_CMD_SPL_WRITE_SIZE=0x20000
 CONFIG_CMD_DFU=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_GPT=y
diff --git a/include/configs/pico-imx7d.h b/include/configs/pico-imx7d.h
index 94c846a395..8f1876c8b2 100644
--- a/include/configs/pico-imx7d.h
+++ b/include/configs/pico-imx7d.h
@@ -12,6 +12,18 @@
 
 #include "imx7_spl.h"
 
+#ifdef CONFIG_SPL_OS_BOOT
+/* Falcon Mode */
+#define CONFIG_SPL_FS_LOAD_ARGS_NAME	"args"
+#define CONFIG_SPL_FS_LOAD_KERNEL_NAME	"uImage"
+#define CONFIG_SYS_SPL_ARGS_ADDR	0x88000000
+
+/* Falcon Mode - MMC support: args at 1MB kernel at 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 */
+#endif
+
 /* Size of malloc() pool */
 #define CONFIG_SYS_MALLOC_LEN		(32 * SZ_1M)
 
-- 
2.18.0