0001-mx51evk-uEnv.txt-bootz-n-fixes.patch

From 83c8b33719a7f20735e582997daab13031988165 Mon Sep 17 00:00:00 2001
From: Robert Nelson <robertcnelson@gmail.com>
Date: Fri, 17 Jun 2016 10:04:38 -0500
Subject: [PATCH] mx51evk: uEnv.txt, bootz, n fixes

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>
---
 configs/mx51evk_defconfig |   3 +
 drivers/mmc/fsl_esdhc.c   |   9 +--
 include/configs/mx51evk.h | 143 ++++++++++++++++++++++++++++++++++++++++------
 3 files changed, 129 insertions(+), 26 deletions(-)

diff --git a/configs/mx51evk_defconfig b/configs/mx51evk_defconfig
index 0b3b232..b611059 100644
--- a/configs/mx51evk_defconfig
+++ b/configs/mx51evk_defconfig
@@ -11,5 +11,8 @@ CONFIG_CMD_USB=y
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y
+CONFIG_CMD_EXT2=y
+CONFIG_CMD_EXT4=y
 CONFIG_CMD_FAT=y
+CONFIG_CMD_FS_GENERIC=y
 CONFIG_OF_LIBFDT=y
diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c
index 57ad975..46a9a36 100644
--- a/drivers/mmc/fsl_esdhc.c
+++ b/drivers/mmc/fsl_esdhc.c
@@ -275,15 +275,8 @@ static int esdhc_setup_data(struct mmc *mmc, struct mmc_data *data)
 	 * Rounding up to next power of 2
 	 * => timeout + 13 = log2(mmc->clock/4) + 1
 	 * => timeout + 13 = fls(mmc->clock/4)
-	 *
-	 * However, the MMC spec "It is strongly recommended for hosts to
-	 * implement more than 500ms timeout value even if the card
-	 * indicates the 250ms maximum busy length."  Even the previous
-	 * value of 300ms is known to be insufficient for some cards.
-	 * So, we use
-	 * => timeout + 13 = fls(mmc->clock/2)
 	 */
-	timeout = fls(mmc->clock/2);
+	timeout = fls(mmc->clock/4);
 	timeout -= 13;
 
 	if (timeout > 14)
diff --git a/include/configs/mx51evk.h b/include/configs/mx51evk.h
index 23b8b46..40cba3d 100644
--- a/include/configs/mx51evk.h
+++ b/include/configs/mx51evk.h
@@ -75,6 +75,7 @@
 #define CONFIG_GENERIC_MMC
 #define CONFIG_DOS_PARTITION
 
+#define CONFIG_SUPPORT_RAW_INITRD
 /*
  * Eth Configs
  */
@@ -127,24 +128,75 @@
 #define CONFIG_LOADADDR		0x92000000	/* loadaddr env var */
 
 #define CONFIG_EXTRA_ENV_SETTINGS \
+	"initrd_high=0xffffffff\0" \
+	"fdt_high=0xffffffff\0" \
 	"script=boot.scr\0" \
 	"image=zImage\0" \
 	"fdt_file=imx51-babbage.dtb\0" \
-	"fdt_addr=0x91000000\0" \
+	"fdt_addr=0x91ff0000\0" \
 	"boot_fdt=try\0" \
 	"ip_dyn=yes\0" \
+	"loadaddr=0x90010000\0" \
+	"rdaddr=0x92000000\0" \
+	"console=ttymxc0,115200n8\0" \
+	"optargs=\0" \
+	"cmdline=\0" \
 	"mmcdev=0\0" \
 	"mmcpart=1\0" \
-	"mmcroot=/dev/mmcblk0p2 rootwait rw\0" \
-	"mmcargs=setenv bootargs console=ttymxc0,${baudrate} " \
-		"root=${mmcroot}\0" \
+	"mmcroot=/dev/mmcblk0p2 ro\0" \
+	"mmcrootfstype=ext4 rootwait\0" \
+	"mmcargs=setenv bootargs console=${console} " \
+		"${optargs} " \
+		"root=${mmcroot} " \
+		"rootfstype=${mmcrootfstype} " \
+		"${cmdline}\0" \
 	"loadbootscript=" \
-		"fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};\0" \
+		"load mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};\0" \
 	"bootscript=echo Running bootscript from mmc ...; " \
 		"source\0" \
-	"loadimage=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${image}\0" \
-	"loadfdt=fatload mmc ${mmcdev}:${mmcpart} ${fdt_addr} ${fdt_file}\0" \
-	"mmcboot=echo Booting from mmc ...; " \
+	"loadbootenv=load mmc ${mmcdev}:${mmcpart} ${loadaddr} uEnv.txt\0" \
+	"importbootenv=echo Importing environment from mmc (uEnv.txt)...; " \
+		"env import -t ${loadaddr} ${filesize}\0" \
+	"loadimage=load mmc ${bootpart} ${loadaddr} ${bootdir}/${bootfile}\0" \
+	"loadrd=load mmc ${bootpart} ${rdaddr} ${bootdir}/${rdfile}; setenv rdsize ${filesize}\0" \
+	"loadfdt=echo loading ${fdtdir}/${fdt_file} ...;  load mmc ${bootpart} ${fdt_addr} ${fdtdir}/${fdt_file}\0" \
+	"mmcboot=mmc dev ${mmcdev}; " \
+		"if mmc rescan; then " \
+			"echo SD/MMC found on device ${mmcdev};" \
+			"setenv bootpart ${mmcdev}:1; " \
+			"echo Checking for: /uEnv.txt ...;" \
+			"if test -e mmc ${bootpart} /uEnv.txt; then " \
+				"load mmc ${bootpart} ${loadaddr} /uEnv.txt;" \
+				"env import -t ${loadaddr} ${filesize};" \
+				"echo Loaded environment from /uEnv.txt;" \
+				"echo Checking if uenvcmd is set ...;" \
+				"if test -n ${uenvcmd}; then " \
+					"echo Running uenvcmd ...;" \
+					"run uenvcmd;" \
+				"fi;" \
+			"fi; " \
+			"echo Checking for: /boot/uEnv.txt ...;" \
+			"for i in 1 2 3 4 5 6 7 ; do " \
+				"setenv mmcpart ${i};" \
+				"setenv bootpart ${mmcdev}:${mmcpart};" \
+				"if test -e mmc ${bootpart} /boot/uEnv.txt; then " \
+					"load mmc ${bootpart} ${loadaddr} /boot/uEnv.txt;" \
+					"env import -t ${loadaddr} ${filesize};" \
+					"echo Loaded environment from /boot/uEnv.txt;" \
+					"if test -n ${dtb}; then " \
+						"setenv fdt_file ${dtb};" \
+						"echo Using: dtb=${fdt_file} ...;" \
+					"fi;" \
+					"echo Checking if uname_r is set in /boot/uEnv.txt...;" \
+					"if test -n ${uname_r}; then " \
+						"echo Running uname_boot ...;" \
+						"setenv mmcroot /dev/mmcblk${mmcdev}p${mmcpart} ro;" \
+						"run uname_boot;" \
+					"fi;" \
+				"fi;" \
+			"done;" \
+		"fi;\0" \
+	"mmcboot_old=echo Booting from mmc ...; " \
 		"run mmcargs; " \
 		"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
 			"if run loadfdt; then " \
@@ -183,19 +235,74 @@
 			"fi; " \
 		"else " \
 			"bootz; " \
+		"fi;\0" \
+	"uname_boot="\
+		"setenv bootdir /boot; " \
+		"setenv bootfile vmlinuz-${uname_r}; " \
+		"if test -e mmc ${bootpart} ${bootdir}/${bootfile}; then " \
+			"echo loading ${bootdir}/${bootfile} ...; "\
+			"run loadimage;" \
+			"setenv fdtdir /boot/dtbs/${uname_r}; " \
+			"if test -e mmc ${bootpart} ${fdtdir}/${fdt_file}; then " \
+				"run loadfdt;" \
+			"else " \
+				"setenv fdtdir /usr/lib/linux-image-${uname_r}; " \
+				"if test -e mmc ${bootpart} ${fdtdir}/${fdt_file}; then " \
+					"run loadfdt;" \
+				"else " \
+					"setenv fdtdir /lib/firmware/${uname_r}/device-tree; " \
+					"if test -e mmc ${bootpart} ${fdtdir}/${fdt_file}; then " \
+						"run loadfdt;" \
+					"else " \
+						"setenv fdtdir /boot/dtb-${uname_r}; " \
+						"if test -e mmc ${bootpart} ${fdtdir}/${fdt_file}; then " \
+							"run loadfdt;" \
+						"else " \
+							"setenv fdtdir /boot/dtbs; " \
+							"if test -e mmc ${bootpart} ${fdtdir}/${fdt_file}; then " \
+								"run loadfdt;" \
+							"else " \
+								"setenv fdtdir /boot/dtb; " \
+								"if test -e mmc ${bootpart} ${fdtdir}/${fdt_file}; then " \
+									"run loadfdt;" \
+								"else " \
+									"setenv fdtdir /boot; " \
+									"if test -e mmc ${bootpart} ${fdtdir}/${fdt_file}; then " \
+										"run loadfdt;" \
+									"else " \
+										"echo; echo unable to find ${fdt_file} ...; echo booting legacy ...;"\
+										"run mmcargs;" \
+										"echo debug: [${bootargs}] ... ;" \
+										"echo debug: [bootz ${loadaddr}] ... ;" \
+										"bootz ${loadaddr}; " \
+									"fi;" \
+								"fi;" \
+							"fi;" \
+						"fi;" \
+					"fi;" \
+				"fi;" \
+			"fi; " \
+			"setenv rdfile initrd.img-${uname_r}; " \
+			"if test -e mmc ${bootpart} ${bootdir}/${rdfile}; then " \
+				"echo loading ${bootdir}/${rdfile} ...; "\
+				"run loadrd;" \
+				"if test -n ${uuid}; then " \
+					"setenv mmcroot UUID=${uuid} ro;" \
+				"fi;" \
+				"run mmcargs;" \
+				"echo debug: [${bootargs}] ... ;" \
+				"echo debug: [bootz ${loadaddr} ${rdaddr}:${rdsize} ${fdt_addr}] ... ;" \
+				"bootz ${loadaddr} ${rdaddr}:${rdsize} ${fdt_addr}; " \
+			"else " \
+				"run mmcargs;" \
+				"echo debug: [${bootargs}] ... ;" \
+				"echo debug: [bootz ${loadaddr} - ${fdt_addr}] ... ;" \
+				"bootz ${loadaddr} - ${fdt_addr}; " \
+			"fi;" \
 		"fi;\0"
 
 #define CONFIG_BOOTCOMMAND \
-	"mmc dev ${mmcdev}; if mmc rescan; then " \
-		"if run loadbootscript; then " \
-			"run bootscript; " \
-		"else " \
-			"if run loadimage; then " \
-				"run mmcboot; " \
-			"else run netboot; " \
-			"fi; " \
-		"fi; " \
-	"else run netboot; fi"
+	"run mmcboot;"
 
 #define CONFIG_ARP_TIMEOUT	200UL
 
-- 
2.8.1