scsi.c
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/*
* (C) Copyright 2001
* Denis Peter, MPL AG Switzerland
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* SCSI support.
*/
#include <common.h>
#include <command.h>
#include <scsi.h>
static int scsi_curr_dev; /* current device */
/*
* scsi boot command intepreter. Derived from diskboot
*/
static int do_scsiboot(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
{
return common_diskboot(cmdtp, "scsi", argc, argv);
}
/*
* scsi command intepreter
*/
static int do_scsi(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
{
int ret;
switch (argc) {
case 0:
case 1:
return CMD_RET_USAGE;
case 2:
if (strncmp(argv[1], "res", 3) == 0) {
printf("\nReset SCSI\n");
scsi_bus_reset();
ret = scsi_scan(1);
if (ret)
return CMD_RET_FAILURE;
return ret;
}
if (strncmp(argv[1], "inf", 3) == 0) {
blk_list_devices(IF_TYPE_SCSI);
return 0;
}
if (strncmp(argv[1], "dev", 3) == 0) {
if (blk_print_device_num(IF_TYPE_SCSI, scsi_curr_dev)) {
printf("\nno SCSI devices available\n");
return CMD_RET_FAILURE;
}
return 0;
}
if (strncmp(argv[1], "scan", 4) == 0) {
ret = scsi_scan(1);
if (ret)
return CMD_RET_FAILURE;
return ret;
}
if (strncmp(argv[1], "part", 4) == 0) {
if (blk_list_part(IF_TYPE_SCSI))
printf("\nno SCSI devices available\n");
return 0;
}
return CMD_RET_USAGE;
case 3:
if (strncmp(argv[1], "dev", 3) == 0) {
int dev = (int)simple_strtoul(argv[2], NULL, 10);
if (!blk_show_device(IF_TYPE_SCSI, dev)) {
scsi_curr_dev = dev;
printf("... is now current device\n");
} else {
return CMD_RET_FAILURE;
}
return 0;
}
if (strncmp(argv[1], "part", 4) == 0) {
int dev = (int)simple_strtoul(argv[2], NULL, 10);
if (blk_print_part_devnum(IF_TYPE_SCSI, dev)) {
printf("\nSCSI device %d not available\n",
dev);
return CMD_RET_FAILURE;
}
return 0;
}
return CMD_RET_USAGE;
default:
/* at least 4 args */
if (strcmp(argv[1], "read") == 0) {
ulong addr = simple_strtoul(argv[2], NULL, 16);
ulong blk = simple_strtoul(argv[3], NULL, 16);
ulong cnt = simple_strtoul(argv[4], NULL, 16);
ulong n;
printf("\nSCSI read: device %d block # %ld, count %ld ... ",
scsi_curr_dev, blk, cnt);
n = blk_read_devnum(IF_TYPE_SCSI, scsi_curr_dev, blk,
cnt, (ulong *)addr);
printf("%ld blocks read: %s\n", n,
n == cnt ? "OK" : "ERROR");
return 0;
} else if (strcmp(argv[1], "write") == 0) {
ulong addr = simple_strtoul(argv[2], NULL, 16);
ulong blk = simple_strtoul(argv[3], NULL, 16);
ulong cnt = simple_strtoul(argv[4], NULL, 16);
ulong n;
printf("\nSCSI write: device %d block # %ld, count %ld ... ",
scsi_curr_dev, blk, cnt);
n = blk_write_devnum(IF_TYPE_SCSI, scsi_curr_dev, blk,
cnt, (ulong *)addr);
printf("%ld blocks written: %s\n", n,
n == cnt ? "OK" : "ERROR");
return 0;
}
} /* switch */
return CMD_RET_USAGE;
}
U_BOOT_CMD(
scsi, 5, 1, do_scsi,
"SCSI sub-system",
"reset - reset SCSI controller\n"
"scsi info - show available SCSI devices\n"
"scsi scan - (re-)scan SCSI bus\n"
"scsi device [dev] - show or set current device\n"
"scsi part [dev] - print partition table of one or all SCSI devices\n"
"scsi read addr blk# cnt - read `cnt' blocks starting at block `blk#'\n"
" to memory address `addr'\n"
"scsi write addr blk# cnt - write `cnt' blocks starting at block\n"
" `blk#' from memory address `addr'"
);
U_BOOT_CMD(
scsiboot, 3, 1, do_scsiboot,
"boot from SCSI device",
"loadAddr dev:part"
);