xref: /openbmc/u-boot/cmd/scsi.c (revision a0a868b2)
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 );
138