[PATCH 21/28] bootmethod: Add a command

[Simon Glass]

Add a 'bootmethod' command to handle listing and selection of bootmethods.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 MAINTAINERS      |   1 +
 cmd/Kconfig      |   8 +++
 cmd/bootmethod.c | 130 +++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 139 insertions(+)
 create mode 100644 cmd/bootmethod.c

diff --git a/MAINTAINERS b/MAINTAINERS
index f78141c138b..655746265f8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -635,6 +635,7 @@ M:	Simon Glass <sjg at chromium.org>
 S:	Maintained
 F:	boot/bootmethod.c
 F:	boot/distro.c
+F:	cmd/bootmethod.c
 F:	include/bootmethod.h
 F:	include/distro.h
 
diff --git a/cmd/Kconfig b/cmd/Kconfig
index ffef3cc76ca..eec0dee8773 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -194,6 +194,14 @@ config CMD_BOOTM
 	help
 	  Boot an application image from the memory.
 
+config CMD_BOOTMETHOD
+	bool "bootmethod"
+	default y if BOOTMETHOD
+	help
+	  Support working with bootmethods, including listing available ones
+	  and showing information about a particular one. It also allows
+	  looking at bootflows available with the bootmethod.
+
 config BOOTM_EFI
 	bool "Support booting UEFI FIT images"
 	depends on CMD_BOOTEFI && CMD_BOOTM && FIT
diff --git a/cmd/bootmethod.c b/cmd/bootmethod.c
new file mode 100644
index 00000000000..2620ff61eb2
--- /dev/null
+++ b/cmd/bootmethod.c
@@ -0,0 +1,130 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * 'bootmethod' command
+ *
+ * Copyright 2021 Google LLC
+ * Written by Simon Glass <sjg at chromium.org>
+ */
+
+#include <common.h>
+#include <bootmethod.h>
+#include <command.h>
+#include <dm.h>
+#include <dm/device-internal.h>
+#include <dm/uclass-internal.h>
+
+static int bootmethod_check_state(struct bootflow_state **statep)
+{
+	struct bootflow_state *state;
+	int ret;
+
+	ret = bootmethod_get_state(&state);
+	if (ret)
+		return ret;
+	if (!state->cur_bootmethod) {
+		printf("Please use 'bootmethod select' first\n");
+		return -ENOENT;
+	}
+	*statep = state;
+
+	return 0;
+}
+
+static int do_bootmethod_list(struct cmd_tbl *cmdtp, int flag, int argc,
+			      char *const argv[])
+{
+	bool probe;
+
+	probe = argc >= 2 && !strcmp(argv[1], "-p");
+	bootmethod_list(probe);
+
+	return 0;
+}
+
+static int do_bootmethod_select(struct cmd_tbl *cmdtp, int flag, int argc,
+				char *const argv[])
+{
+	struct bootflow_state *state;
+	struct udevice *dev;
+	const char *name;
+	char *endp;
+	int seq;
+	int ret;
+
+	ret = bootmethod_get_state(&state);
+	if (ret)
+		return CMD_RET_FAILURE;
+	if (argc < 2) {
+		state->cur_bootmethod = NULL;
+		return 0;
+	}
+	name = argv[1];
+	seq = simple_strtol(name, &endp, 16);
+
+	/* Select by name or number */
+	if (*endp)
+		ret = uclass_get_device_by_name(UCLASS_BOOTMETHOD, name, &dev);
+	else
+		ret = uclass_get_device_by_seq(UCLASS_BOOTMETHOD, seq, &dev);
+	if (ret) {
+		printf("Cannot find '%s' (err=%d)\n", name, ret);
+		return CMD_RET_FAILURE;
+	}
+	state->cur_bootmethod = dev;
+
+	return 0;
+}
+
+static int do_bootmethod_info(struct cmd_tbl *cmdtp, int flag, int argc,
+			      char *const argv[])
+{
+	struct bootflow_state *state;
+	struct bootflow *bflow;
+	int ret, i, num_valid;
+	struct udevice *dev;
+	bool probe;
+
+	probe = argc >= 2 && !strcmp(argv[1], "-p");
+
+	ret = bootmethod_check_state(&state);
+	if (ret)
+		return CMD_RET_FAILURE;
+
+	dev = state->cur_bootmethod;
+
+	/* Count the number of bootflows, including how many are valid*/
+	num_valid = 0;
+	for (ret = bootmethod_first_bootflow(dev, &bflow), i = 0;
+	     !ret;
+	     ret = bootmethod_next_bootflow(&bflow), i++)
+		num_valid += bflow->state == BOOTFLOWST_LOADED;
+
+	/*
+	 * Prove the device, if requested, otherwise assume that there is no
+	 * error
+	 */
+	ret = 0;
+	if (probe)
+		ret = device_probe(dev);
+
+	printf("Name:      %s\n", dev->name);
+	printf("Sequence:  %d\n", dev_seq(dev));
+	printf("Status:    %s\n", ret ? simple_itoa(ret) : device_active(dev) ?
+		"Probed" : "OK");
+	printf("Uclass:    %s\n", dev_get_uclass_name(dev_get_parent(dev)));
+	printf("Bootflows: %d (%d valid)\n", i, num_valid);
+
+	return 0;
+}
+
+#ifdef CONFIG_SYS_LONGHELP
+static char bootmethod_help_text[] =
+	"list [-p]      - list all available bootmethods (-p to probe)\n"
+	"bootmethod select <bm>    - select a bootmethod by name\n"
+	"bootmethod info [-p]      - show information about a bootmethod (-p to probe)";
+#endif
+
+U_BOOT_CMD_WITH_SUBCMDS(bootmethod, "Bootmethods", bootmethod_help_text,
+	U_BOOT_SUBCMD_MKENT(list, 2, 1, do_bootmethod_list),
+	U_BOOT_SUBCMD_MKENT(select, 2, 1, do_bootmethod_select),
+	U_BOOT_SUBCMD_MKENT(info, 2, 1, do_bootmethod_info));
-- 
2.33.0.rc1.237.g0d66db33f3-goog