cmd/scsi.c

   1 /*
   2  * (C) Copyright 2001
   3  * Denis Peter, MPL AG Switzerland
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 /*
   9  * SCSI support.
  10  */
  11 #include <common.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(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
  21 {
  22         return common_diskboot(cmdtp, "scsi", argc, argv);
  23 }
  24
  25 /*
  26  * scsi command intepreter
  27  */
  28 static int do_scsi(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
  29 {
  30         int ret;
  31
  32         switch (argc) {
  33         case 0:
  34         case 1:
  35                 return CMD_RET_USAGE;
  36         case 2:
  37                 if (strncmp(argv[1], "res", 3) == 0) {
  38                         printf("\nReset SCSI\n");
  39                         scsi_bus_reset();
  40                         ret = scsi_scan(1);
  41                         if (ret)
  42                                 return CMD_RET_FAILURE;
  43                         return ret;
  44                 }
  45                 if (strncmp(argv[1], "inf", 3) == 0) {
  46                         blk_list_devices(IF_TYPE_SCSI);
  47                         return 0;
  48                 }
  49                 if (strncmp(argv[1], "dev", 3) == 0) {
  50                         if (blk_print_device_num(IF_TYPE_SCSI, scsi_curr_dev)) {
  51                                 printf("\nno SCSI devices available\n");
  52                                 return CMD_RET_FAILURE;
  53                         }
  54
  55                         return 0;
  56                 }
  57                 if (strncmp(argv[1], "scan", 4) == 0) {
  58                         ret = scsi_scan(1);
  59                         if (ret)
  60                                 return CMD_RET_FAILURE;
  61                         return ret;
  62                 }
  63                 if (strncmp(argv[1], "part", 4) == 0) {
  64                         if (blk_list_part(IF_TYPE_SCSI))
  65                                 printf("\nno SCSI devices available\n");
  66                         return 0;
  67                 }
  68                 return CMD_RET_USAGE;
  69         case 3:
  70                 if (strncmp(argv[1], "dev", 3) == 0) {
  71                         int dev = (int)simple_strtoul(argv[2], NULL, 10);
  72
  73                         if (!blk_show_device(IF_TYPE_SCSI, dev)) {
  74                                 scsi_curr_dev = dev;
  75                                 printf("... is now current device\n");
  76                         } else {
  77                                 return CMD_RET_FAILURE;
  78                         }
  79                         return 0;
  80                 }
  81                 if (strncmp(argv[1], "part", 4) == 0) {
  82                         int dev = (int)simple_strtoul(argv[2], NULL, 10);
  83
  84                         if (blk_print_part_devnum(IF_TYPE_SCSI, dev)) {
  85                                 printf("\nSCSI device %d not available\n",
  86                                        dev);
  87                                 return CMD_RET_FAILURE;
  88                         }
  89                         return 0;
  90                 }
  91                 return CMD_RET_USAGE;
  92         default:
  93                 /* at least 4 args */
  94                 if (strcmp(argv[1], "read") == 0) {
  95                         ulong addr = simple_strtoul(argv[2], NULL, 16);
  96                         ulong blk  = simple_strtoul(argv[3], NULL, 16);
  97                         ulong cnt  = simple_strtoul(argv[4], NULL, 16);
  98                         ulong n;
  99
 100                         printf("\nSCSI read: device %d block # %ld, count %ld ... ",
 101                                scsi_curr_dev, blk, cnt);
 102                         n = blk_read_devnum(IF_TYPE_SCSI, scsi_curr_dev, blk,
 103                                             cnt, (ulong *)addr);
 104                         printf("%ld blocks read: %s\n", n,
 105                                n == cnt ? "OK" : "ERROR");
 106                         return 0;
 107                 } else if (strcmp(argv[1], "write") == 0) {
 108                         ulong addr = simple_strtoul(argv[2], NULL, 16);
 109                         ulong blk = simple_strtoul(argv[3], NULL, 16);
 110                         ulong cnt = simple_strtoul(argv[4], NULL, 16);
 111                         ulong n;
 112
 113                         printf("\nSCSI write: device %d block # %ld, count %ld ... ",
 114                                scsi_curr_dev, blk, cnt);
 115                         n = blk_write_devnum(IF_TYPE_SCSI, scsi_curr_dev, blk,
 116                                              cnt, (ulong *)addr);
 117                         printf("%ld blocks written: %s\n", n,
 118                                n == cnt ? "OK" : "ERROR");
 119                         return 0;
 120                 }
 121         } /* switch */
 122         return CMD_RET_USAGE;
 123 }
 124
 125 U_BOOT_CMD(
 126         scsi, 5, 1, do_scsi,
 127         "SCSI sub-system",
 128         "reset - reset SCSI controller\n"
 129         "scsi info  - show available SCSI devices\n"
 130         "scsi scan  - (re-)scan SCSI bus\n"
 131         "scsi device [dev] - show or set current device\n"
 132         "scsi part [dev] - print partition table of one or all SCSI devices\n"
 133         "scsi read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
 134         "     to memory address `addr'\n"
 135         "scsi write addr blk# cnt - write `cnt' blocks starting at block\n"
 136         "     `blk#' from memory address `addr'"
 137 );
 138
 139 U_BOOT_CMD(
 140         scsiboot, 3, 1, do_scsiboot,
 141         "boot from SCSI device",
 142         "loadAddr dev:part"
 143 );