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 #ifndef CONFIG_DM_SCSI
  40                         scsi_bus_reset(NULL);
  41 #endif
  42                         ret = scsi_scan(true);
  43                         if (ret)
  44                                 return CMD_RET_FAILURE;
  45                         return ret;
  46                 }
  47                 if (strncmp(argv[1], "inf", 3) == 0) {
  48                         blk_list_devices(IF_TYPE_SCSI);
  49                         return 0;
  50                 }
  51                 if (strncmp(argv[1], "dev", 3) == 0) {
  52                         if (blk_print_device_num(IF_TYPE_SCSI, scsi_curr_dev)) {
  53                                 printf("\nno SCSI devices available\n");
  54                                 return CMD_RET_FAILURE;
  55                         }
  56
  57                         return 0;
  58                 }
  59                 if (strncmp(argv[1], "scan", 4) == 0) {
  60                         ret = scsi_scan(true);
  61                         if (ret)
  62                                 return CMD_RET_FAILURE;
  63                         return ret;
  64                 }
  65                 if (strncmp(argv[1], "part", 4) == 0) {
  66                         if (blk_list_part(IF_TYPE_SCSI))
  67                                 printf("\nno SCSI devices available\n");
  68                         return 0;
  69                 }
  70                 return CMD_RET_USAGE;
  71         case 3:
  72                 if (strncmp(argv[1], "dev", 3) == 0) {
  73                         int dev = (int)simple_strtoul(argv[2], NULL, 10);
  74
  75                         if (!blk_show_device(IF_TYPE_SCSI, dev)) {
  76                                 scsi_curr_dev = dev;
  77                                 printf("... is now current device\n");
  78                         } else {
  79                                 return CMD_RET_FAILURE;
  80                         }
  81                         return 0;
  82                 }
  83                 if (strncmp(argv[1], "part", 4) == 0) {
  84                         int dev = (int)simple_strtoul(argv[2], NULL, 10);
  85
  86                         if (blk_print_part_devnum(IF_TYPE_SCSI, dev)) {
  87                                 printf("\nSCSI device %d not available\n",
  88                                        dev);
  89                                 return CMD_RET_FAILURE;
  90                         }
  91                         return 0;
  92                 }
  93                 return CMD_RET_USAGE;
  94         default:
  95                 /* at least 4 args */
  96                 if (strcmp(argv[1], "read") == 0) {
  97                         ulong addr = simple_strtoul(argv[2], NULL, 16);
  98                         ulong blk  = simple_strtoul(argv[3], NULL, 16);
  99                         ulong cnt  = simple_strtoul(argv[4], NULL, 16);
 100                         ulong n;
 101
 102                         printf("\nSCSI read: device %d block # %ld, count %ld ... ",
 103                                scsi_curr_dev, blk, cnt);
 104                         n = blk_read_devnum(IF_TYPE_SCSI, scsi_curr_dev, blk,
 105                                             cnt, (ulong *)addr);
 106                         printf("%ld blocks read: %s\n", n,
 107                                n == cnt ? "OK" : "ERROR");
 108                         return 0;
 109                 } else if (strcmp(argv[1], "write") == 0) {
 110                         ulong addr = simple_strtoul(argv[2], NULL, 16);
 111                         ulong blk = simple_strtoul(argv[3], NULL, 16);
 112                         ulong cnt = simple_strtoul(argv[4], NULL, 16);
 113                         ulong n;
 114
 115                         printf("\nSCSI write: device %d block # %ld, count %ld ... ",
 116                                scsi_curr_dev, blk, cnt);
 117                         n = blk_write_devnum(IF_TYPE_SCSI, scsi_curr_dev, blk,
 118                                              cnt, (ulong *)addr);
 119                         printf("%ld blocks written: %s\n", n,
 120                                n == cnt ? "OK" : "ERROR");
 121                         return 0;
 122                 }
 123         } /* switch */
 124         return CMD_RET_USAGE;
 125 }
 126
 127 U_BOOT_CMD(
 128         scsi, 5, 1, do_scsi,
 129         "SCSI sub-system",
 130         "reset - reset SCSI controller\n"
 131         "scsi info  - show available SCSI devices\n"
 132         "scsi scan  - (re-)scan SCSI bus\n"
 133         "scsi device [dev] - show or set current device\n"
 134         "scsi part [dev] - print partition table of one or all SCSI devices\n"
 135         "scsi read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
 136         "     to memory address `addr'\n"
 137         "scsi write addr blk# cnt - write `cnt' blocks starting at block\n"
 138         "     `blk#' from memory address `addr'"
 139 );
 140
 141 U_BOOT_CMD(
 142         scsiboot, 3, 1, do_scsiboot,
 143         "boot from SCSI device",
 144         "loadAddr dev:part"
 145 );