GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
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+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 Socionext Inc.
+ *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
+ */
+
+#include <common.h>
+#include <env.h>
+#include <mmc.h>
+#include <linux/errno.h>
+
+static int find_first_mmc_device(void)
+{
+	struct mmc *mmc;
+	int i;
+
+	for (i = 0; (mmc = find_mmc_device(i)); i++) {
+		if (!mmc_init(mmc) && IS_MMC(mmc))
+			return i;
+	}
+
+	return -ENODEV;
+}
+
+int mmc_get_env_dev(void)
+{
+	return find_first_mmc_device();
+}
+
+static int do_mmcsetn(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	int dev;
+
+	dev = find_first_mmc_device();
+	if (dev < 0)
+		return CMD_RET_FAILURE;
+
+	env_set_ulong("mmc_first_dev", dev);
+	return CMD_RET_SUCCESS;
+}
+
+U_BOOT_CMD(
+	   mmcsetn,	1,	1,	do_mmcsetn,
+	"Set the first MMC (not SD) dev number to \"mmc_first_dev\" environment",
+	""
+);