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 <xypron.glpk@gmx.de>

diff --git a/cmd/mmc.c b/cmd/mmc.c
index 1860a3f2e5dd223b02b335445dc1dcaacae01899..6d71208a2072e8beb65f9beb30e65973212a67e8 100644 (file)
--- 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)