avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/cmd/scsi.c

@@ -0,0 +1,137 @@
+/*
+ * (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
+ */
+int do_scsiboot(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+	return common_diskboot(cmdtp, "scsi", argc, argv);
+}
+
+/*
+ * scsi command intepreter
+ */
+int do_scsi(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+	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();
+			scsi_scan(1);
+			return 0;
+		}
+		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) {
+			scsi_scan(1);
+			return 0;
+		}
+		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"
+);