[PATCH v2 1/2] ARM: am33xx: Add barebox_update eMMC option
Daniel Schultz
d.schultz at phytec.de
Mon Sep 7 02:59:53 PDT 2015
With this patch the barebox_update command will be extended by the possibility
to flash the MLO to eMMC devices.
The MLO will be flashed to the following addresses:
0x00000
0x20000
0x40000
0x60000
Because the first 512 Bytes of the MLO are reserved for the CHSETTINGS header
and this only use ~80 Bytes, there is space for the partition table in the
header.
The command will overwrite the bootstrap code area and will hold the
partition table and the Boot signature.
Signed-off-by: Daniel Schultz <d.schultz at phytec.de>
---
Changes:
v2:
The MLO will also written to 0x0
arch/arm/configs/am335x_defconfig | 1 +
arch/arm/mach-omap/Kconfig | 7 +++
arch/arm/mach-omap/Makefile | 1 +
arch/arm/mach-omap/am33xx_bbu_emmc.c | 96 +++++++++++++++++++++++++++++++++++
arch/arm/mach-omap/include/mach/bbu.h | 18 +++++++
5 files changed, 123 insertions(+)
create mode 100644 arch/arm/mach-omap/am33xx_bbu_emmc.c
diff --git a/arch/arm/configs/am335x_defconfig b/arch/arm/configs/am335x_defconfig
index 0db2075..234042f 100644
--- a/arch/arm/configs/am335x_defconfig
+++ b/arch/arm/configs/am335x_defconfig
@@ -1,6 +1,7 @@
CONFIG_ARCH_OMAP=y
CONFIG_BAREBOX_UPDATE_AM33XX_SPI_NOR_MLO=y
CONFIG_BAREBOX_UPDATE_AM33XX_NAND=y
+CONFIG_BAREBOX_UPDATE_AM33XX_EMMC=y
CONFIG_OMAP_MULTI_BOARDS=y
CONFIG_MACH_AFI_GF=y
CONFIG_MACH_BEAGLEBONE=y
diff --git a/arch/arm/mach-omap/Kconfig b/arch/arm/mach-omap/Kconfig
index 0b59afc..5c68062 100644
--- a/arch/arm/mach-omap/Kconfig
+++ b/arch/arm/mach-omap/Kconfig
@@ -97,6 +97,13 @@ config BAREBOX_UPDATE_AM33XX_NAND
This also includes a handler for updating the regular barebox binary
in NAND.
+config BAREBOX_UPDATE_AM33XX_EMMC
+ prompt "barebox update eMMC handler"
+ bool
+ depends on BAREBOX_UPDATE
+ help
+ Say Y for barebox update eMMC handler.
+
config ARCH_TEXT_BASE
hex
default 0x80e80000 if MACH_OMAP343xSDP
diff --git a/arch/arm/mach-omap/Makefile b/arch/arm/mach-omap/Makefile
index db2856d..a84e94e 100644
--- a/arch/arm/mach-omap/Makefile
+++ b/arch/arm/mach-omap/Makefile
@@ -36,3 +36,4 @@ pbl-$(CONFIG_OMAP3_USBBOOT) += omap3_xload_usb.o
obj-$(CONFIG_CMD_BOOT_ORDER) += boot_order.o
obj-$(CONFIG_BAREBOX_UPDATE_AM33XX_SPI_NOR_MLO) += am33xx_bbu_spi_mlo.o
obj-$(CONFIG_BAREBOX_UPDATE_AM33XX_NAND) += am33xx_bbu_nand.o
+obj-$(CONFIG_BAREBOX_UPDATE_AM33XX_EMMC) += am33xx_bbu_emmc.o
diff --git a/arch/arm/mach-omap/am33xx_bbu_emmc.c b/arch/arm/mach-omap/am33xx_bbu_emmc.c
new file mode 100644
index 0000000..418cf61
--- /dev/null
+++ b/arch/arm/mach-omap/am33xx_bbu_emmc.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2015 Phytec Messtechnik GmbH
+ * Author: Daniel Schultz <d.schultz at phytec.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <bbu.h>
+#include <fs.h>
+#include <fcntl.h>
+#include <filetype.h>
+
+#define PART_TABLE_SIZE 66
+#define PART_TABLE_OFFSET 0x1BE
+
+static int emmc_mlo_handler(struct bbu_handler *handler, struct bbu_data *data)
+{
+ int ret = 0;
+ int i = 0;
+ int fd;
+ const void *image = data->image;
+ size_t size = data->len;
+ u8 *part_table = 0;
+
+ if (file_detect_type(image, size) != filetype_ch_image) {
+ pr_err("%s is not a valid ch-image\n", data->imagefile);
+ return -EINVAL;
+ }
+ ret = bbu_confirm(data);
+ if (ret != 0)
+ return ret;
+
+ fd = open(handler->devicefile, O_WRONLY);
+ if (fd < 0) {
+ pr_err("could not open %s: %s\n", handler->devicefile,
+ errno_str());
+ return fd;
+ }
+
+ /* save the partition table */
+ part_table = xmalloc(PART_TABLE_SIZE);
+ ret = pread(fd, part_table, PART_TABLE_SIZE, PART_TABLE_OFFSET);
+ if (ret < 0) {
+ pr_err("could not read partition table from fd %s: %s\n",
+ handler->devicefile, errno_str());
+ goto error;
+ }
+
+ /* write the MLOs */
+ for (i = 0; i < 4; i++) {
+ ret = pwrite(fd, image, size, i * 0x20000);
+ if (ret < 0) {
+ pr_err("could not write MLO %i/4 to fd %s: %s\n",
+ i + 1, handler->devicefile, errno_str());
+ goto error_save_part_table;
+ }
+ }
+
+error_save_part_table:
+ /* write the partition table back */
+ ret = pwrite(fd, part_table, PART_TABLE_SIZE, PART_TABLE_OFFSET);
+ if (ret < 0)
+ pr_err("could not write partition table to fd %s: %s\n",
+ handler->devicefile, errno_str());
+
+error:
+ close(fd);
+ return ret;
+}
+
+int am33xx_bbu_emmc_mlo_register_handler(const char *name, char *devicefile)
+{
+ struct bbu_handler *handler;
+ int ret;
+
+ handler = xzalloc(sizeof(*handler));
+ handler->devicefile = devicefile;
+ handler->name = name;
+ handler->handler = emmc_mlo_handler;
+
+ ret = bbu_register_handler(handler);
+
+ if (ret)
+ free(handler);
+
+ return ret;
+}
diff --git a/arch/arm/mach-omap/include/mach/bbu.h b/arch/arm/mach-omap/include/mach/bbu.h
index da5c214..7c5dcbd 100644
--- a/arch/arm/mach-omap/include/mach/bbu.h
+++ b/arch/arm/mach-omap/include/mach/bbu.h
@@ -36,4 +36,22 @@ static inline int am33xx_bbu_nand_register_handler(const char *name, char *devic
}
#endif
+#ifdef CONFIG_BAREBOX_UPDATE_AM33XX_EMMC
+int am33xx_bbu_emmc_mlo_register_handler(const char *name, char *devicefile);
+int am33xx_bbu_emmc_register_handler(const char *name, char *devicefile);
+#else
+static inline int am33xx_bbu_emmc_mlo_register_handler(const char *name,
+ char *devicefile)
+{
+ return 0;
+}
+
+static inline int am33xx_bbu_emmc_register_handler(const char *name,
+ char *devicefile)
+{
+ return 0;
+}
+#endif
+
+
#endif
--
1.9.1
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