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