[PATCH v2 04/17] common: update: add a generic interface for FIT image

[AKASHI Takahiro]

The main purpose of this patch is to separate a generic interface for
updating firmware using DFU drivers from "auto-update" via tftp.

This function will also be used in implementing UEFI capsule update
in a later commit.

Signed-off-by: AKASHI Takahiro <takahiro.akashi at linaro.org>
---
 common/Kconfig  | 16 +++++++++++
 common/Makefile |  2 +-
 common/update.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++--
 include/image.h | 12 ++++++++
 4 files changed, 102 insertions(+), 3 deletions(-)

diff --git a/common/Kconfig b/common/Kconfig
index 2d86dd7e63c6..a51d2a7b9d2a 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -985,9 +985,16 @@ endmenu
 
 menu "Update support"
 
+config UPDATE_COMMON
+	bool
+	default n
+	select DFU_ALT
+
 config UPDATE_TFTP
 	bool "Auto-update using fitImage via TFTP"
 	depends on FIT
+	depends on DFU
+	select UPDATE_COMMON
 	help
 	  This option allows performing update of NOR with data in fitImage
 	  sent via TFTP boot.
@@ -1002,6 +1009,15 @@ config UPDATE_TFTP_MSEC_MAX
 	default 100
 	depends on UPDATE_TFTP
 
+config UPDATE_FIT
+	bool "Firmware update using fitImage"
+	depends on FIT
+	depends on DFU
+	select UPDATE_COMMON
+	help
+	  This option allows performing update of DFU-capable storage with
+	  data in fitImage.
+
 config ANDROID_AB
 	bool "Android A/B updates"
 	default n
diff --git a/common/Makefile b/common/Makefile
index 2e7a090588d9..c238db8108e7 100644
--- a/common/Makefile
+++ b/common/Makefile
@@ -53,7 +53,7 @@ obj-$(CONFIG_LCD_ROTATION) += lcd_console_rotation.o
 obj-$(CONFIG_LCD_DT_SIMPLEFB) += lcd_simplefb.o
 obj-$(CONFIG_LYNXKDI) += lynxkdi.o
 obj-$(CONFIG_MENU) += menu.o
-obj-$(CONFIG_UPDATE_TFTP) += update.o
+obj-$(CONFIG_UPDATE_COMMON) += update.o
 obj-$(CONFIG_DFU_TFTP) += update.o
 obj-$(CONFIG_USB_KEYBOARD) += usb_kbd.o
 obj-$(CONFIG_CMDLINE) += cli_readline.o cli_simple.o
diff --git a/common/update.c b/common/update.c
index 3547dc68bf7c..a8151383fae7 100644
--- a/common/update.c
+++ b/common/update.c
@@ -24,6 +24,7 @@
 #include <errno.h>
 #include <mtd/cfi_flash.h>
 
+#ifdef CONFIG_UPDATE_TFTP
 /* env variable holding the location of the update file */
 #define UPDATE_FILE_ENV		"updatefile"
 
@@ -211,6 +212,7 @@ static int update_flash(ulong addr_source, ulong addr_first, ulong size)
 	return 1;
 #endif
 }
+#endif /* CONFIG_UPDATE_TFTP */
 
 static int update_fit_getparams(const void *fit, int noffset, ulong *addr,
 						ulong *fladdr, ulong *size)
@@ -228,6 +230,7 @@ static int update_fit_getparams(const void *fit, int noffset, ulong *addr,
 	return 0;
 }
 
+#ifdef CONFIG_UPDATE_TFTP
 int update_tftp(ulong addr, char *interface, char *devstring)
 {
 	char *filename, *env_addr, *fit_image_name;
@@ -322,8 +325,9 @@ got_update_file:
 			}
 		} else if (fit_image_check_type(fit, noffset,
 						IH_TYPE_FIRMWARE)) {
-			ret = dfu_tftp_write(fit_image_name, update_addr,
-					     update_size, interface, devstring);
+			ret = dfu_write_by_name(fit_image_name, update_addr,
+						update_size, interface,
+						devstring);
 			if (ret)
 				return ret;
 		}
@@ -333,3 +337,70 @@ next_node:
 
 	return ret;
 }
+#endif
+
+#ifdef CONFIG_UPDATE_FIT
+/**
+ * fit_update - update storage with FIT image
+ * @fit:	Pointer to FIT image
+ *
+ * Update firmware on storage using FIT image as input.
+ * The storage area to be update will be identified by the name
+ * in FIT and matching it to "dfu_alt_info" variable.
+ *
+ * Return:      0 - on success, non-zero - otherwise
+ */
+int fit_update(const void *fit)
+{
+	char *fit_image_name;
+	ulong update_addr, update_fladdr, update_size;
+	int images_noffset, ndepth, noffset;
+	int ret = 0;
+
+	if (!fit)
+		return -EINVAL;
+
+	if (!fit_check_format((void *)fit)) {
+		printf("Bad FIT format of the update file, aborting auto-update\n");
+		return -EINVAL;
+	}
+
+	/* process updates */
+	images_noffset = fdt_path_offset(fit, FIT_IMAGES_PATH);
+
+	ndepth = 0;
+	noffset = fdt_next_node(fit, images_noffset, &ndepth);
+	while (noffset >= 0 && ndepth > 0) {
+		if (ndepth != 1)
+			goto next_node;
+
+		fit_image_name = (char *)fit_get_name(fit, noffset, NULL);
+		printf("Processing update '%s' :", fit_image_name);
+
+		if (!fit_image_verify(fit, noffset)) {
+			printf("Error: invalid update hash, aborting\n");
+			ret = 1;
+			goto next_node;
+		}
+
+		printf("\n");
+		if (update_fit_getparams(fit, noffset, &update_addr,
+					 &update_fladdr, &update_size)) {
+			printf("Error: can't get update parameters, aborting\n");
+			ret = 1;
+			goto next_node;
+		}
+
+		if (fit_image_check_type(fit, noffset, IH_TYPE_FIRMWARE)) {
+			ret = dfu_write_by_name(fit_image_name, update_addr,
+						update_size, NULL, NULL);
+			if (ret)
+				return ret;
+		}
+next_node:
+		noffset = fdt_next_node(fit, noffset, &ndepth);
+	}
+
+	return ret;
+}
+#endif
diff --git a/include/image.h b/include/image.h
index ad81dad44429..1f2c53339d51 100644
--- a/include/image.h
+++ b/include/image.h
@@ -1573,4 +1573,16 @@ struct fit_loadable_tbl {
 		.handler = _handler, \
 	}
 
+/**
+ * fit_update - update storage with FIT image
+ * @fit:        Pointer to FIT image
+ *
+ * Update firmware on storage using FIT image as input.
+ * The storage area to be update will be indentified by the name
+ * in FIT and matching it to "dfu_alt_info" variable.
+ *
+ * Return:      0 on success, non-zero otherwise
+ */
+int fit_update(const void *fit);
+
 #endif	/* __IMAGE_H__ */
-- 
2.27.0