cmd/lsblk.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2020
   4  * Niel Fourie, DENX Software Engineering, lusus@denx.de.
   5  */
   6
   7 #include <common.h>
   8 #include <blk.h>
   9 #include <command.h>
  10 #include <dm.h>
  11
  12 static int do_lsblk(struct cmd_tbl *cmdtp, int flag, int argc, char * const argv[])
  13 {
  14         struct driver *d = ll_entry_start(struct driver, driver);
  15         const int n_ents = ll_entry_count(struct driver, driver);
  16         struct driver *entry;
  17         struct udevice *udev;
  18         struct uclass *uc;
  19         struct blk_desc *desc;
  20         int ret, i;
  21
  22         ret = uclass_get(UCLASS_BLK, &uc);
  23         if (ret) {
  24                 puts("Could not get BLK uclass.\n");
  25                 return CMD_RET_FAILURE;
  26         }
  27         puts("Block Driver          Devices\n");
  28         puts("-----------------------------\n");
  29         for (entry = d; entry < d + n_ents; entry++) {
  30                 if (entry->id != UCLASS_BLK)
  31                         continue;
  32                 i = 0;
  33                 printf("%-20.20s", entry->name);
  34                 uclass_foreach_dev(udev, uc) {
  35                         if (udev->driver != entry)
  36                                 continue;
  37                         desc = dev_get_uclass_plat(udev);
  38                         printf("%c %s %u", i ? ',' : ':',
  39                                blk_get_uclass_name(desc->uclass_id),
  40                                desc->devnum);
  41                         i++;
  42                 }
  43                 if (!i)
  44                         puts(": <none>");
  45                 puts("\n");
  46         }
  47
  48         return CMD_RET_SUCCESS;
  49 }
  50
  51 U_BOOT_CMD(lsblk, 1, 0, do_lsblk, "list block drivers and devices",
  52            "- display list of block device drivers and attached block devices"
  53 );