From: Benjamin Hahn <B.Hahn@phytec.de>
Date: Tue, 21 Oct 2025 14:34:17 +0000 (+0200)
Subject: bootstd: make it possible to use tftp for netboot with standardboot
X-Git-Tag: v2026.01-rc1~5
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=fae6c54d238279bf79c66ca65330425dff2c952f;p=thirdparty%2Fu-boot.git

bootstd: make it possible to use tftp for netboot with standardboot

Add the option to load the bootscript with the tftp command (static IP)
instead of the dhcp command (dynamic IP). For this a new function
tftpb_run similar to dhcp_run, is needed. The selection of which command
to use can be done with the ip_dyn environment variable, which can be
set to yes or no. The ip_dyn variable was chosen as it is already in use
on the imx platforms.
Also edit the bootstd doc.

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Benjamin Hahn <B.Hahn@phytec.de>
---

diff --git a/boot/bootmeth_script.c b/boot/bootmeth_script.c
index 020cb8a7aec..cd50977cc40 100644
--- a/boot/bootmeth_script.c
+++ b/boot/bootmeth_script.c
@@ -129,7 +129,11 @@ static int script_read_bootflow_net(struct bootflow *bflow)
 	if (!fname)
 		return log_msg_ret("dhc", -EINVAL);
 
-	ret = dhcp_run(addr, fname, true);
+	if (IS_ENABLED(CONFIG_CMD_TFTPBOOT) && env_get_yesno("ip_dyn") == 0)
+		ret = tftpb_run(addr, fname);
+	else
+		ret = dhcp_run(addr, fname, true);
+
 	if (ret)
 		return log_msg_ret("dhc", ret);
 
diff --git a/doc/develop/bootstd/overview.rst b/doc/develop/bootstd/overview.rst
index e36cde4d360..abb616adc77 100644
--- a/doc/develop/bootstd/overview.rst
+++ b/doc/develop/bootstd/overview.rst
@@ -262,6 +262,10 @@ fdt_addr_r
 fdtoverlay_addr_r (needed if overlays are used)
     Address at which to load the overlay for the FDT, e.g. 0x02000000
 
+ip_dyn
+    Use dynamic IP (dhcp) or static IP (tftp) for loading the bootscript over
+    ethernet. Default is dhcp. e.g. no
+
 kernel_addr_r
     Address at which to load the kernel, e.g. 0x02080000
 
diff --git a/doc/develop/bootstd/script.rst b/doc/develop/bootstd/script.rst
index 47f3684b86b..3b19c22726f 100644
--- a/doc/develop/bootstd/script.rst
+++ b/doc/develop/bootstd/script.rst
@@ -12,8 +12,10 @@ list of prefixes (``{"/", "/boot"}`` by default) and can be adjust with the
 `filename-prefixes` property in the bootstd device.
 
 For a network device, the filename is obtained from the `boot_script_dhcp`
-environment variable and the file is read using tftp. It must be in the
-top-level directory of the tftp server.
+environment variable. By setting the `ip_dyn` environment variable it can be
+decided if dynamic ip (dhcp command) or static ip (tftp command) is used for
+reading the file. By default dhcp is used. The file must be in the top-level
+directory of the tftp server.
 
 In either case (file or network), the bootmeth searches for the file and creates
 a bootflow if found. The bootmeth searches for "boot.scr.uimg" first, then
diff --git a/include/net-common.h b/include/net-common.h
index 78d98e5bba0..f5cff3e7c0c 100644
--- a/include/net-common.h
+++ b/include/net-common.h
@@ -490,6 +490,15 @@ int dhcp_run(ulong addr, const char *fname, bool autoload);
  */
 int do_dhcp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
 
+/**
+ * tftpb_run() - Run TFTP on the current ethernet device
+ *
+ * @addr: Address to load the file into
+ * @fname: Filename of file to load (NULL to use the default filename)
+ * @return 0 if OK, -ENOENT if ant file was not found
+ */
+int tftpb_run(ulong addr, const char *fname);
+
 /**
  * do_ping - Run the ping command
  *
diff --git a/net/net-common.c b/net/net-common.c
index 442b0597558..c68e19fc03e 100644
--- a/net/net-common.c
+++ b/net/net-common.c
@@ -83,3 +83,24 @@ int dhcp_run(ulong addr, const char *fname, bool autoload)
 	return 0;
 }
 #endif
+
+#if defined(CONFIG_CMD_TFTPBOOT)
+int tftpb_run(ulong addr, const char *fname)
+{
+	char *tftp_argv[] = {"tftpboot", NULL, (char *)fname, NULL};
+	struct cmd_tbl cmdtp = {};      /* dummy */
+	char file_addr[17] = {0};
+
+	log_debug("addr=%lx, fname=%s\n", addr, fname);
+	sprintf(file_addr, "%lx", addr);
+	tftp_argv[1] = file_addr;
+
+	int result = do_tftpb(&cmdtp, 0, fname ? 3 : 2, tftp_argv);
+
+	if (result)
+		return log_msg_ret("res", -ENOENT);
+
+	return 0;
+}
+
+#endif