1 files changed, 102 insertions, 0 deletions
diff --git a/src/security/tpm/tpm.h b/src/security/tpm/tpm.h
new file mode 100644
index 0000000000..32a44c17eb
--- /dev/null
+++ b/src/security/tpm/tpm.h
@@ -0,0 +1,102 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2011 Google Inc.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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.
+ */
+
+#ifndef TPM_H_
+#define TPM_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+enum tis_access {
+	TPM_ACCESS_VALID = (1 << 7),
+	TPM_ACCESS_ACTIVE_LOCALITY = (1 << 5),
+	TPM_ACCESS_REQUEST_PENDING = (1 << 2),
+	TPM_ACCESS_REQUEST_USE = (1 << 1),
+	TPM_ACCESS_ESTABLISHMENT = (1 << 0),
+};
+
+enum tis_status {
+	TPM_STS_FAMILY_SHIFT = 26,
+	TPM_STS_FAMILY_MASK = (0x3 << TPM_STS_FAMILY_SHIFT),
+	TPM_STS_FAMILY_TPM_2_0 = (1 << TPM_STS_FAMILY_SHIFT),
+	TPM_STS_FAMILY_TPM_1_2 = (0 << TPM_STS_FAMILY_SHIFT),
+	TPM_STS_RESET_ESTABLISHMENT = (1 << 25),
+	TPM_STS_COMMAND_CANCEL = (1 << 24),
+	TPM_STS_BURST_COUNT_SHIFT = 8,
+	TPM_STS_BURST_COUNT_MASK = (0xFFFF << TPM_STS_BURST_COUNT_SHIFT),
+	TPM_STS_VALID = (1 << 7),
+	TPM_STS_COMMAND_READY = (1 << 6),
+	TPM_STS_GO = (1 << 5),
+	TPM_STS_DATA_AVAIL = (1 << 4),
+	TPM_STS_DATA_EXPECT = (1 << 3),
+	TPM_STS_SELF_TEST_DONE = (1 << 2),
+	TPM_STS_RESPONSE_RETRY = (1 << 1),
+};
+
+/*
+ * tis_init()
+ *
+ * Initialize the TPM device. Returns 0 on success or -1 on
+ * failure (in case device probing did not succeed).
+ */
+int tis_init(void);
+
+/*
+ * tis_open()
+ *
+ * Requests access to locality 0 for the caller. After all commands have been
+ * completed the caller is supposed to call tis_close().
+ *
+ * Returns 0 on success, -1 on failure.
+ */
+int tis_open(void);
+
+/*
+ * tis_close()
+ *
+ * terminate the currect session with the TPM by releasing the locked
+ * locality. Returns 0 on success of -1 on failure (in case lock
+ * removal did not succeed).
+ */
+int tis_close(void);
+
+/*
+ * tis_sendrecv()
+ *
+ * Send the requested data to the TPM and then try to get its response
+ *
+ * @sendbuf - buffer of the data to send
+ * @send_size size of the data to send
+ * @recvbuf - memory to save the response to
+ * @recv_len - pointer to the size of the response buffer
+ *
+ * Returns 0 on success (and places the number of response bytes at recv_len)
+ * or -1 on failure.
+ */
+int tis_sendrecv(const u8 *sendbuf, size_t send_size, u8 *recvbuf,
+			size_t *recv_len);
+
+void init_tpm(int s3resume);
+
+/*
+ * tis_plat_irq_status()
+ *
+ * Check tpm irq and clear it.
+ *
+ * Returns 1 when irq pending or 0 when not.
+ */
+int tis_plat_irq_status(void);
+
+#endif /* TPM_H_ */