cmd: fuse: add report command for mvebu

This is an armada-388-specific efuse dumping command used during
production at SolidRun to ensure all efuses are clear.

Likely it breaks the build for other platforms and should be rewritten
when upstream is desired.

Signed-off-by: Josua Mayer <josua@solid-run.com>

cmd/fuse.c

@@ -14,6 +14,7 @@
 #include <fuse.h>
 #include <mapmem.h>
 #include <linux/errno.h>
+#include <fs.h>
 
 static int strtou32(const char *str, unsigned int base, u32 *result)
 {
@@ -41,6 +42,54 @@ static int confirm_prog(void)
 	return 0;
 }
 
+static int report(const char *interface, const char *device, const char *filename)
+{
+	int i, j;
+	int ret;
+	uint32_t val[3];
+	char buffer[66*64] = {0};
+	size_t len = 0;
+
+	// open report device
+	if (interface && device && filename) {
+		ret = fs_set_blk_dev(interface, device, FS_TYPE_ANY);
+		if (ret) {
+			printf("Failed to open %s %s: %d\n", interface, device, ret);
+			return 1;
+		}
+	}
+
+	// read all fuse banks
+	for (i = 0; i <= 65; i++) {
+		for (j = 0; j < 3; j++) {
+			ret = fuse_read(i, j, &val[j]);
+			if (ret)
+				return ret;
+			// TODO: report
+		}
+		if (!ret) {
+			printf("EFUSE bank %.2d: 0x%.8x 0x%.8x 0x%.8x\n", i, val[0], val[1], val[2]);
+			len += sprintf(&buffer[len], "EFUSE bank %.2d: 0x%.8x 0x%.8x 0x%.8x\n", i, val[0], val[1], val[2]);
+		} else  {
+			printf("EFUSE bank %.2d: Error %d\n", i, ret);
+			len += sprintf(&buffer[len],  "EFUSE bank %.2d: Error %d\n", i, ret);
+		}
+	}
+
+	// write report
+	if (interface && device && filename) {
+		ret = fs_write(filename, map_to_sysmem(buffer), 0, len, NULL);
+		if (ret < 0) {
+			printf("Failed to write report file \"%s\": %d\n", filename, ret);
+			return 1;
+		}
+
+		printf("Report written to scsi 0:1 \"%s\"\n", filename);
+	}
+
+	return 0;
+}
+
 static int do_fuse(struct cmd_tbl *cmdtp, int flag, int argc,
 		   char *const argv[])
 {
@@ -51,6 +100,15 @@ static int do_fuse(struct cmd_tbl *cmdtp, int flag, int argc,
 	void *buf, *start;
 	int ret, i;
 
+	if (!strcmp(op, "report")) {
+		if (argc == 2)
+			return report(NULL, NULL, NULL);
+		else if (argc == 5)
+			return report(argv[2], argv[3], argv[4]);
+		else
+			return CMD_RET_USAGE;
+	}
+
 	argc -= 2 + confirmed;
 	argv += 2 + confirmed;
 
@@ -189,5 +247,6 @@ U_BOOT_CMD(
 	"fuse prog [-y] <bank> <word> <hexval> [<hexval>...] - program 1 or\n"
 	"    several fuse words, starting at 'word' (PERMANENT)\n"
 	"fuse override <bank> <word> <hexval> [<hexval>...] - override 1 or\n"
-	"    several fuse words, starting at 'word'"
+	"    several fuse words, starting at 'word'\n"
+	"fuse report [<interface> <dev[:part]> <filename>] - read all fuses and generate report"
 );