xref: /openbmc/u-boot/cmd/scsi.c (revision 16520189918ef7cbebbb3022e0674fd7e365ab03)
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(NULL);
40  			ret = scsi_scan(true);
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(true);
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  );
144