cmd/scsi.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2001
   4  * Denis Peter, MPL AG Switzerland
   5  */
   6
   7 /*
   8  * SCSI support.
   9  */
  10 #include <common.h>
  11 #include <blk.h>
  12 #include <command.h>
  13 #include <scsi.h>
  14
  15 static int scsi_curr_dev; /* current device */
  16
  17 /*
  18  * scsi boot command intepreter. Derived from diskboot
  19  */
  20 static int do_scsiboot(struct cmd_tbl *cmdtp, int flag, int argc,
  21                        char *const argv[])
  22 {
  23         return common_diskboot(cmdtp, "scsi", argc, argv);
  24 }
  25
  26 /*
  27  * scsi command intepreter
  28  */
  29 static int do_scsi(struct cmd_tbl *cmdtp, int flag, int argc,
  30                    char *const argv[])
  31 {
  32         int ret;
  33
  34         if (argc == 2) {
  35                 if (strncmp(argv[1], "res", 3) == 0) {
  36                         printf("\nReset SCSI\n");
  37 #ifndef CONFIG_DM_SCSI
  38                         scsi_bus_reset(NULL);
  39 #endif
  40                         ret = scsi_scan(true);
  41                         if (ret)
  42                                 return CMD_RET_FAILURE;
  43                         return ret;
  44                 }
  45                 if (strncmp(argv[1], "scan", 4) == 0) {
  46                         ret = scsi_scan(true);
  47                         if (ret)
  48                                 return CMD_RET_FAILURE;
  49                         return ret;
  50                 }
  51         }
  52
  53         return blk_common_cmd(argc, argv, IF_TYPE_SCSI, &scsi_curr_dev);
  54 }
  55
  56 U_BOOT_CMD(
  57         scsi, 5, 1, do_scsi,
  58         "SCSI sub-system",
  59         "reset - reset SCSI controller\n"
  60         "scsi info  - show available SCSI devices\n"
  61         "scsi scan  - (re-)scan SCSI bus\n"
  62         "scsi device [dev] - show or set current device\n"
  63         "scsi part [dev] - print partition table of one or all SCSI devices\n"
  64         "scsi read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
  65         "     to memory address `addr'\n"
  66         "scsi write addr blk# cnt - write `cnt' blocks starting at block\n"
  67         "     `blk#' from memory address `addr'"
  68 );
  69
  70 U_BOOT_CMD(
  71         scsiboot, 3, 1, do_scsiboot,
  72         "boot from SCSI device",
  73         "loadAddr dev:part"
  74 );