update: tftp: dfu: Extend update_tftp() function to support DFU

This code allows using DFU defined mediums for storing data received via
TFTP protocol.

It reuses and preserves functionality of legacy code at common/update.c.

The update_tftp() function now accepts parameters - namely medium device
name and its number (e.g. mmc 1).

Without this information passed old behavior is preserved.

Signed-off-by: Lukasz Majewski <l.majewski@majess.pl>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>

common/Makefile

@@ -210,6 +210,7 @@ obj-$(CONFIG_LYNXKDI) += lynxkdi.o
 obj-$(CONFIG_MENU) += menu.o
 obj-$(CONFIG_MODEM_SUPPORT) += modem.o
 obj-$(CONFIG_UPDATE_TFTP) += update.o
+obj-$(CONFIG_DFU_TFTP) += update.o
 obj-$(CONFIG_USB_KEYBOARD) += usb_kbd.o
 obj-$(CONFIG_CMD_DFU) += cmd_dfu.o
 obj-$(CONFIG_CMD_GPT) += cmd_gpt.o

common/cmd_fitupd.c

@@ -23,7 +23,7 @@ static int do_fitupd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	if (argc == 2)
 		addr = simple_strtoul(argv[1], NULL, 16);
 
-	return update_tftp(addr);
+	return update_tftp(addr, NULL, NULL);
 }
 
 U_BOOT_CMD(fitupd, 2, 0, do_fitupd,

common/main.c

@@ -75,7 +75,7 @@ void main_loop(void)
 	run_preboot_environment_command();
 
 #if defined(CONFIG_UPDATE_TFTP)
-	update_tftp(0UL);
+	update_tftp(0UL, NULL, NULL);
 #endif /* CONFIG_UPDATE_TFTP */
 
 	s = bootdelay_process();

common/update.c

@@ -13,11 +13,17 @@
 #error "CONFIG_FIT and CONFIG_OF_LIBFDT are required for auto-update feature"
 #endif
 
+#if defined(CONFIG_UPDATE_TFTP) && defined(CONFIG_SYS_NO_FLASH)
+#error "CONFIG_UPDATE_TFTP and CONFIG_SYS_NO_FLASH needed for legacy behaviour"
+#endif
+
 #include <command.h>
 #include <flash.h>
 #include <net.h>
 #include <net/tftp.h>
 #include <malloc.h>
+#include <dfu.h>
+#include <errno.h>
 
 /* env variable holding the location of the update file */
 #define UPDATE_FILE_ENV		"updatefile"
@@ -222,13 +228,24 @@ static int update_fit_getparams(const void *fit, int noffset, ulong *addr,
 	return 0;
 }
 
-int update_tftp(ulong addr)
+int update_tftp(ulong addr, char *interface, char *devstring)
 {
-	char *filename, *env_addr;
-	int images_noffset, ndepth, noffset;
+	char *filename, *env_addr, *fit_image_name;
 	ulong update_addr, update_fladdr, update_size;
-	void *fit;
+	int images_noffset, ndepth, noffset;
+	bool update_tftp_dfu;
 	int ret = 0;
+	void *fit;
+
+	if (interface == NULL && devstring == NULL) {
+		update_tftp_dfu = false;
+	} else if (interface && devstring) {
+		update_tftp_dfu = true;
+	} else {
+		error("Interface: %s and devstring: %s not supported!\n",
+		      interface, devstring);
+		return -EINVAL;
+	}
 
 	/* use already present image */
 	if (addr)
@@ -277,8 +294,8 @@ got_update_file:
 		if (ndepth != 1)
 			goto next_node;
 
-		printf("Processing update '%s' :",
-			fit_get_name(fit, noffset, NULL));
+		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");
@@ -294,10 +311,20 @@ got_update_file:
 			ret = 1;
 			goto next_node;
 		}
-		if (update_flash(update_addr, update_fladdr, update_size)) {
-			printf("Error: can't flash update, aborting\n");
-			ret = 1;
-			goto next_node;
+
+		if (!update_tftp_dfu) {
+			if (update_flash(update_addr, update_fladdr,
+					 update_size)) {
+				printf("Error: can't flash update, aborting\n");
+				ret = 1;
+				goto next_node;
+			}
+		} else if (fit_image_check_type(fit, noffset,
+						IH_TYPE_FIRMWARE)) {
+			ret = dfu_tftp_write(fit_image_name, update_addr,
+					     update_size, interface, devstring);
+			if (ret)
+				return ret;
 		}
 next_node:
 		noffset = fdt_next_node(fit, noffset, &ndepth);

include/net.h

@@ -813,8 +813,18 @@ void copy_filename(char *dst, const char *src, int size);
 /* get a random source port */
 unsigned int random_port(void);
 
-/* Update U-Boot over TFTP */
-int update_tftp(ulong addr);
+/**
+ * update_tftp - Update firmware over TFTP (via DFU)
+ *
+ * This function updates board's firmware via TFTP
+ *
+ * @param addr - memory address where data is stored
+ * @param interface - the DFU medium name - e.g. "mmc"
+ * @param devstring - the DFU medium number - e.g. "1"
+ *
+ * @return - 0 on success, other value on failure
+ */
+int update_tftp(ulong addr, char *interface, char *devstring);
 
 /**********************************************************************/