1 files changed, 103 insertions, 0 deletions
diff --git a/common/cmd_tpm.c b/common/cmd_tpm.c
new file mode 100644
index 0000000..6f5cd48
--- /dev/null
+++ b/common/cmd_tpm.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <command.h>
+#include <tpm.h>
+
+#define MAX_TRANSACTION_SIZE 30
+
+/*
+ * tpm_write() expects a variable number of parameters: the internal address
+ * followed by data to write, byte by byte.
+ *
+ * Returns 0 on success or -1 on errors (wrong arguments or TPM failure).
+ */
+static int tpm_process(int argc, char * const argv[], cmd_tbl_t *cmdtp)
+{
+	u8 tpm_buffer[MAX_TRANSACTION_SIZE];
+	u32 write_size, read_size;
+	char *p;
+	int rv = -1;
+
+	for (write_size = 0; write_size < argc; write_size++) {
+		u32 datum = simple_strtoul(argv[write_size], &p, 0);
+		if (*p || (datum > 0xff)) {
+			printf("\n%s: bad data value\n\n", argv[write_size]);
+			cmd_usage(cmdtp);
+			return rv;
+		}
+		tpm_buffer[write_size] = (u8)datum;
+	}
+
+	read_size = sizeof(tpm_buffer);
+	if (!tis_sendrecv(tpm_buffer, write_size, tpm_buffer, &read_size)) {
+		int i;
+		puts("Got TPM response:\n");
+		for (i = 0; i < read_size; i++)
+			printf(" %2.2x", tpm_buffer[i]);
+		puts("\n");
+		rv = 0;
+	} else {
+		puts("tpm command failed\n");
+	}
+	return rv;
+}
+
+static int do_tpm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	int rv = 0;
+
+	/*
+	 * Verify that in case it is present, the first argument, it is
+	 * exactly one character in size.
+	 */
+	if (argc < 7) {
+		puts("command should be at least six bytes in size\n");
+		return -1;
+	}
+
+	if (tis_init()) {
+		puts("tis_init() failed!\n");
+		return -1;
+	}
+
+	if (tis_open()) {
+		puts("tis_open() failed!\n");
+		return -1;
+	}
+
+	rv = tpm_process(argc - 1, argv + 1, cmdtp);
+
+	if (tis_close()) {
+		puts("tis_close() failed!\n");
+		rv = -1;
+	}
+
+	return rv;
+}
+
+U_BOOT_CMD(tpm, MAX_TRANSACTION_SIZE, 1, do_tpm,
+	   "<byte> [<byte> ...]   - write data and read response",
+	   "send arbitrary data (at least 6 bytes) to the TPM "
+	   "device and read the response"
+);