cmd/bootdev.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * 'bootdev' command
   4  *
   5  * Copyright 2021 Google LLC
   6  * Written by Simon Glass <sjg@chromium.org>
   7  */
   8
   9 #include <bootdev.h>
  10 #include <bootflow.h>
  11 #include <bootstd.h>
  12 #include <command.h>
  13 #include <dm.h>
  14 #include <dm/device-internal.h>
  15 #include <dm/uclass-internal.h>
  16
  17 static int bootdev_check_state(struct bootstd_priv **stdp)
  18 {
  19         struct bootstd_priv *std;
  20         int ret;
  21
  22         ret = bootstd_get_priv(&std);
  23         if (ret)
  24                 return ret;
  25         if (!std->cur_bootdev) {
  26                 printf("Please use 'bootdev select' first\n");
  27                 return -ENOENT;
  28         }
  29         *stdp = std;
  30
  31         return 0;
  32 }
  33
  34 static int do_bootdev_list(struct cmd_tbl *cmdtp, int flag, int argc,
  35                            char *const argv[])
  36 {
  37         bool probe;
  38
  39         probe = argc >= 2 && !strcmp(argv[1], "-p");
  40         bootdev_list(probe);
  41
  42         return 0;
  43 }
  44
  45 static int do_bootdev_select(struct cmd_tbl *cmdtp, int flag, int argc,
  46                              char *const argv[])
  47 {
  48         struct bootstd_priv *std;
  49         struct udevice *dev;
  50         int ret;
  51
  52         ret = bootstd_get_priv(&std);
  53         if (ret)
  54                 return CMD_RET_FAILURE;
  55         if (argc < 2) {
  56                 std->cur_bootdev = NULL;
  57                 return 0;
  58         }
  59         if (bootdev_find_by_any(argv[1], &dev, NULL))
  60                 return CMD_RET_FAILURE;
  61
  62         std->cur_bootdev = dev;
  63
  64         return 0;
  65 }
  66
  67 static int do_bootdev_info(struct cmd_tbl *cmdtp, int flag, int argc,
  68                            char *const argv[])
  69 {
  70         struct bootstd_priv *priv;
  71         struct bootflow *bflow;
  72         int ret, i, num_valid;
  73         struct udevice *dev;
  74         bool probe;
  75
  76         probe = argc >= 2 && !strcmp(argv[1], "-p");
  77
  78         ret = bootdev_check_state(&priv);
  79         if (ret)
  80                 return CMD_RET_FAILURE;
  81
  82         dev = priv->cur_bootdev;
  83
  84         /* Count the number of bootflows, including how many are valid */
  85         num_valid = 0;
  86         for (ret = bootdev_first_bootflow(dev, &bflow), i = 0;
  87              !ret;
  88              ret = bootdev_next_bootflow(&bflow), i++)
  89                 num_valid += bflow->state == BOOTFLOWST_READY;
  90
  91         /*
  92          * Prove the device, if requested, otherwise assume that there is no
  93          * error
  94          */
  95         ret = 0;
  96         if (probe)
  97                 ret = device_probe(dev);
  98
  99         printf("Name:      %s\n", dev->name);
 100         printf("Sequence:  %d\n", dev_seq(dev));
 101         printf("Status:    %s\n", ret ? simple_itoa(-ret) : device_active(dev) ?
 102                 "Probed" : "OK");
 103         printf("Uclass:    %s\n", dev_get_uclass_name(dev_get_parent(dev)));
 104         printf("Bootflows: %d (%d valid)\n", i, num_valid);
 105
 106         return 0;
 107 }
 108
 109 static int do_bootdev_hunt(struct cmd_tbl *cmdtp, int flag, int argc,
 110                            char *const argv[])
 111 {
 112         struct bootstd_priv *priv;
 113         const char *spec = NULL;
 114         bool list = false;
 115         int ret = 0;
 116
 117         if (argc >= 2) {
 118                 if (!strcmp(argv[1], "-l"))
 119                         list = true;
 120                 else
 121                         spec = argv[1];
 122         }
 123
 124         ret = bootstd_get_priv(&priv);
 125         if (ret)
 126                 return ret;
 127         if (list) {
 128                 bootdev_list_hunters(priv);
 129         } else {
 130                 ret = bootdev_hunt(spec, true);
 131                 if (ret) {
 132                         printf("Failed (err=%dE)\n", ret);
 133
 134                         return CMD_RET_FAILURE;
 135                 }
 136         }
 137
 138         return 0;
 139 }
 140
 141 U_BOOT_LONGHELP(bootdev,
 142         "list [-p]         - list all available bootdevs (-p to probe)\n"
 143         "bootdev hunt [-l|<spec>]  - use hunt drivers to find bootdevs\n"
 144         "bootdev select <bd>       - select a bootdev by name | label | seq\n"
 145         "bootdev info [-p]         - show information about a bootdev (-p to probe)");
 146
 147 U_BOOT_CMD_WITH_SUBCMDS(bootdev, "Boot devices", bootdev_help_text,
 148         U_BOOT_SUBCMD_MKENT(list, 2, 1, do_bootdev_list),
 149         U_BOOT_SUBCMD_MKENT(hunt, 2, 1, do_bootdev_hunt),
 150         U_BOOT_SUBCMD_MKENT(select, 2, 1, do_bootdev_select),
 151         U_BOOT_SUBCMD_MKENT(info, 2, 1, do_bootdev_info));