tpm: Rename tpm_tis_infineon.h to tpm_tis.h and move infineon specific stuff in tpm_infineon.c
I2C protocol is not standardize for TPM 1.2.
TIS prococol is define by the Trusted Computing Group and potentially
available on several TPMs.
tpm_tis_infineon.h header is not generic enough.
Rename tpm_tis_infineon.h to tpm_tis.h and move infineon specific
defines/variables to tpm_tis_infineon.c
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
diff --git a/drivers/tpm/tpm_tis.h b/drivers/tpm/tpm_tis.h
new file mode 100644
index 0000000..25b152b
--- /dev/null
+++ b/drivers/tpm/tpm_tis.h
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2011 Infineon Technologies
+ *
+ * Authors:
+ * Peter Huewe <huewe.external@infineon.com>
+ *
+ * Version: 2.1.1
+ *
+ * Description:
+ * Device driver for TCG/TCPA TPM (trusted platform module).
+ * Specifications at www.trustedcomputinggroup.org
+ *
+ * It is based on the Linux kernel driver tpm.c from Leendert van
+ * Dorn, Dave Safford, Reiner Sailer, and Kyleen Hall.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#ifndef _TPM_TIS_I2C_H
+#define _TPM_TIS_I2C_H
+
+#include <linux/compiler.h>
+#include <linux/types.h>
+
+enum tpm_timeout {
+ TPM_TIMEOUT_MS = 5,
+ TIS_SHORT_TIMEOUT_MS = 750,
+ TIS_LONG_TIMEOUT_MS = 2000,
+ SLEEP_DURATION_US = 60,
+ SLEEP_DURATION_LONG_US = 210,
+};
+
+/* Size of external transmit buffer (used in tpm_transmit)*/
+#define TPM_BUFSIZE 4096
+
+/* Index of Count field in TPM response buffer */
+#define TPM_RSP_SIZE_BYTE 2
+#define TPM_RSP_RC_BYTE 6
+
+struct tpm_chip {
+ int is_open;
+ int locality;
+ u32 vend_dev;
+ unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* msec */
+ ulong chip_type;
+};
+
+struct tpm_input_header {
+ __be16 tag;
+ __be32 length;
+ __be32 ordinal;
+} __packed;
+
+struct tpm_output_header {
+ __be16 tag;
+ __be32 length;
+ __be32 return_code;
+} __packed;
+
+struct timeout_t {
+ __be32 a;
+ __be32 b;
+ __be32 c;
+ __be32 d;
+} __packed;
+
+struct duration_t {
+ __be32 tpm_short;
+ __be32 tpm_medium;
+ __be32 tpm_long;
+} __packed;
+
+union cap_t {
+ struct timeout_t timeout;
+ struct duration_t duration;
+};
+
+struct tpm_getcap_params_in {
+ __be32 cap;
+ __be32 subcap_size;
+ __be32 subcap;
+} __packed;
+
+struct tpm_getcap_params_out {
+ __be32 cap_size;
+ union cap_t cap;
+} __packed;
+
+union tpm_cmd_header {
+ struct tpm_input_header in;
+ struct tpm_output_header out;
+};
+
+union tpm_cmd_params {
+ struct tpm_getcap_params_out getcap_out;
+ struct tpm_getcap_params_in getcap_in;
+};
+
+struct tpm_cmd_t {
+ union tpm_cmd_header header;
+ union tpm_cmd_params params;
+} __packed;
+
+/* Max number of iterations after i2c NAK */
+#define MAX_COUNT 3
+
+/*
+ * Max number of iterations after i2c NAK for 'long' commands
+ *
+ * We need this especially for sending TPM_READY, since the cleanup after the
+ * transtion to the ready state may take some time, but it is unpredictable
+ * how long it will take.
+ */
+#define MAX_COUNT_LONG 50
+
+enum tis_access {
+ TPM_ACCESS_VALID = 0x80,
+ TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
+ TPM_ACCESS_REQUEST_PENDING = 0x04,
+ TPM_ACCESS_REQUEST_USE = 0x02,
+};
+
+enum tis_status {
+ TPM_STS_VALID = 0x80,
+ TPM_STS_COMMAND_READY = 0x40,
+ TPM_STS_GO = 0x20,
+ TPM_STS_DATA_AVAIL = 0x10,
+ TPM_STS_DATA_EXPECT = 0x08,
+};
+
+#endif