From d5210e4589294b4c356e7c2ac598cda8d738aec8 Mon Sep 17 00:00:00 2001 From: Heinrich Schuchardt Date: Mon, 30 Mar 2020 07:24:18 +0200 Subject: [PATCH] cmd: mmc: display write protect state of boot partition Boot partitions of eMMC devices can be power on or permanently write protected. Let the 'mmc info' command display the protection state. Signed-off-by: Heinrich Schuchardt --- cmd/mmc.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/cmd/mmc.c b/cmd/mmc.c index 1860a3f..6d71208 100644 --- a/cmd/mmc.c +++ b/cmd/mmc.c @@ -54,6 +54,8 @@ static void print_mmcinfo(struct mmc *mmc) if (!IS_SD(mmc) && mmc->version >= MMC_VERSION_4_41) { bool has_enh = (mmc->part_support & ENHNCD_SUPPORT) != 0; bool usr_enh = has_enh && (mmc->part_attr & EXT_CSD_ENH_USR); + u8 wp, ext_csd[MMC_MAX_BLOCK_LEN]; + int ret; #if CONFIG_IS_ENABLED(MMC_HW_PARTITIONING) puts("HC WP Group Size: "); @@ -90,6 +92,28 @@ static void print_mmcinfo(struct mmc *mmc) putc('\n'); } } + ret = mmc_send_ext_csd(mmc, ext_csd); + if (ret) + return; + wp = ext_csd[EXT_CSD_BOOT_WP_STATUS]; + for (i = 0; i < 2; ++i) { + printf("Boot area %d is ", i); + switch (wp & 3) { + case 0: + printf("not write protected\n"); + break; + case 1: + printf("power on protected\n"); + break; + case 2: + printf("permanently protected\n"); + break; + default: + printf("in reserved protection state\n"); + break; + } + wp >>= 2; + } } } static struct mmc *init_mmc_device(int dev, bool force_init) -- 2.7.4