feat(tpm): add tpm drivers and framework
Add tpm2 drivers to tf-a with adequate framework
-implement a fifo spi interface that works
with discrete tpm chip.
-implement tpm command layer interfaces that are used
to initialize, start and make measurements and
close the interface.
-tpm drivers are built using their own make file
to allow for ease in porting across platforms,
and across different interfaces.
Signed-off-by: Tushar Khandelwal <tushar.khandelwal@arm.com>
Signed-off-by: Abhi Singh <abhi.singh@arm.com>
Change-Id: Ie1a189f45c80f26f4dea16c3bd71b1503709e0ea
diff --git a/include/drivers/tpm/tpm2_interface.h b/include/drivers/tpm/tpm2_interface.h
new file mode 100644
index 0000000..6bfbf6c
--- /dev/null
+++ b/include/drivers/tpm/tpm2_interface.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2025, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef TPM2_INTERFACE_H
+#define TPM2_INTERFACE_H
+
+#include "tpm2_chip.h"
+
+typedef struct interface_ops {
+ int (*get_info)(struct tpm_chip_data *chip_data, uint8_t locality);
+ int (*send)(struct tpm_chip_data *chip_data, const tpm_cmd *buf);
+ int (*receive)(struct tpm_chip_data *chip_data, tpm_cmd *buf);
+ int (*request_access)(struct tpm_chip_data *chip_data, uint8_t locality);
+ int (*release_locality)(struct tpm_chip_data *chip_data, uint8_t locality);
+} interface_ops_t;
+
+struct interface_ops *tpm_interface_getops(struct tpm_chip_data *chip_data, uint8_t locality);
+
+int tpm2_fifo_write_byte(uint16_t tpm_reg, uint8_t val);
+
+int tpm2_fifo_read_byte(uint16_t tpm_reg, uint8_t *val);
+
+int tpm2_fifo_read_chunk(uint16_t tpm_reg, uint8_t len, void *val);
+
+#endif /* TPM2_INTERFACE_H */