/* * Copyright (C) 2011 Infineon Technologies * * Authors: * Peter Huewe * * 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 #include enum tpm_timeout { TPM_TIMEOUT = 5, /* msecs */ }; /* 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 /* Max buffer size supported by our tpm */ #define TPM_DEV_BUFSIZE 1260 enum i2c_chip_type { SLB9635, SLB9645, UNKNOWN, }; struct tpm_chip { bool inited; int is_open; u8 req_complete_mask; u8 req_complete_val; u8 req_canceled; int irq; int locality; unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* msec */ unsigned long duration[3]; /* msec */ struct udevice *dev; u8 buf[TPM_DEV_BUFSIZE + sizeof(u8)]; /* Max buffer size + addr */ enum i2c_chip_type 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 #define SLEEP_DURATION 60 /* in usec */ #define SLEEP_DURATION_LONG 210 /* in usec */ #define TPM_HEADER_SIZE 10 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, }; enum tis_defaults { TIS_SHORT_TIMEOUT = 750, /* ms */ TIS_LONG_TIMEOUT = 2000, /* ms */ }; /* expected value for DIDVID register */ #define TPM_TIS_I2C_DID_VID_9635 0x000b15d1L #define TPM_TIS_I2C_DID_VID_9645 0x001a15d1L #define TPM_ACCESS(l) (0x0000 | ((l) << 4)) #define TPM_STS(l) (0x0001 | ((l) << 4)) #define TPM_DATA_FIFO(l) (0x0005 | ((l) << 4)) #define TPM_DID_VID(l) (0x0006 | ((l) << 4)) enum tpm_duration { TPM_SHORT = 0, TPM_MEDIUM = 1, TPM_LONG = 2, TPM_UNDEFINED, }; /* Extended error numbers from linux (see errno.h) */ #define ECANCELED 125 /* Operation Canceled */ /* Timer frequency. Corresponds to msec timer resolution*/ #define HZ 1000 #define TPM_MAX_ORDINAL 243 #define TPM_MAX_PROTECTED_ORDINAL 12 #define TPM_PROTECTED_ORDINAL_MASK 0xFF #define TPM_CMD_COUNT_BYTE 2 #define TPM_CMD_ORDINAL_BYTE 6 /* * Array with one entry per ordinal defining the maximum amount * of time the chip could take to return the result. The ordinal * designation of short, medium or long is defined in a table in * TCG Specification TPM Main Part 2 TPM Structures Section 17. The * values of the SHORT, MEDIUM, and LONG durations are retrieved * from the chip during initialization with a call to tpm_get_timeouts. */ static const u8 tpm_protected_ordinal_duration[TPM_MAX_PROTECTED_ORDINAL] = { TPM_UNDEFINED, /* 0 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, /* 5 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_SHORT, /* 10 */ TPM_SHORT, }; static const u8 tpm_ordinal_duration[TPM_MAX_ORDINAL] = { TPM_UNDEFINED, /* 0 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, /* 5 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_SHORT, /* 10 */ TPM_SHORT, TPM_MEDIUM, TPM_LONG, TPM_LONG, TPM_MEDIUM, /* 15 */ TPM_SHORT, TPM_SHORT, TPM_MEDIUM, TPM_LONG, TPM_SHORT, /* 20 */ TPM_SHORT, TPM_MEDIUM, TPM_MEDIUM, TPM_MEDIUM, TPM_SHORT, /* 25 */ TPM_SHORT, TPM_MEDIUM, TPM_SHORT, TPM_SHORT, TPM_MEDIUM, /* 30 */ TPM_LONG, TPM_MEDIUM, TPM_SHORT, TPM_SHORT, TPM_SHORT, /* 35 */ TPM_MEDIUM, TPM_MEDIUM, TPM_UNDEFINED, TPM_UNDEFINED, TPM_MEDIUM, /* 40 */ TPM_LONG, TPM_MEDIUM, TPM_SHORT, TPM_SHORT, TPM_SHORT, /* 45 */ TPM_SHORT, TPM_SHORT, TPM_SHORT, TPM_LONG, TPM_MEDIUM, /* 50 */ TPM_MEDIUM, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, /* 55 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_MEDIUM, /* 60 */ TPM_MEDIUM, TPM_MEDIUM, TPM_SHORT, TPM_SHORT, TPM_MEDIUM, /* 65 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_SHORT, /* 70 */ TPM_SHORT, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, /* 75 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_LONG, /* 80 */ TPM_UNDEFINED, TPM_MEDIUM, TPM_LONG, TPM_SHORT, TPM_UNDEFINED, /* 85 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_SHORT, /* 90 */ TPM_SHORT, TPM_SHORT, TPM_SHORT, TPM_SHORT, TPM_UNDEFINED, /* 95 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_MEDIUM, /* 100 */ TPM_SHORT, TPM_SHORT, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, /* 105 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_SHORT, /* 110 */ TPM_SHORT, TPM_SHORT, TPM_SHORT, TPM_SHORT, TPM_SHORT, /* 115 */ TPM_SHORT, TPM_SHORT, TPM_UNDEFINED, TPM_UNDEFINED, TPM_LONG, /* 120 */ TPM_LONG, TPM_MEDIUM, TPM_UNDEFINED, TPM_SHORT, TPM_SHORT, /* 125 */ TPM_SHORT, TPM_LONG, TPM_SHORT, TPM_SHORT, TPM_SHORT, /* 130 */ TPM_MEDIUM, TPM_UNDEFINED, TPM_SHORT, TPM_MEDIUM, TPM_UNDEFINED, /* 135 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_SHORT, /* 140 */ TPM_SHORT, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, /* 145 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_SHORT, /* 150 */ TPM_MEDIUM, TPM_MEDIUM, TPM_SHORT, TPM_SHORT, TPM_UNDEFINED, /* 155 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_SHORT, /* 160 */ TPM_SHORT, TPM_SHORT, TPM_SHORT, TPM_UNDEFINED, TPM_UNDEFINED, /* 165 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_LONG, /* 170 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, /* 175 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_MEDIUM, /* 180 */ TPM_SHORT, TPM_MEDIUM, TPM_MEDIUM, TPM_MEDIUM, TPM_MEDIUM, /* 185 */ TPM_SHORT, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, /* 190 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, /* 195 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_SHORT, /* 200 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_SHORT, TPM_SHORT, /* 205 */ TPM_SHORT, TPM_SHORT, TPM_SHORT, TPM_SHORT, TPM_MEDIUM, /* 210 */ TPM_UNDEFINED, TPM_MEDIUM, TPM_MEDIUM, TPM_MEDIUM, TPM_UNDEFINED, /* 215 */ TPM_MEDIUM, TPM_UNDEFINED, TPM_UNDEFINED, TPM_SHORT, TPM_SHORT, /* 220 */ TPM_SHORT, TPM_SHORT, TPM_SHORT, TPM_SHORT, TPM_UNDEFINED, /* 225 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_SHORT, /* 230 */ TPM_LONG, TPM_MEDIUM, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, /* 235 */ TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_UNDEFINED, TPM_SHORT, /* 240 */ TPM_UNDEFINED, TPM_MEDIUM, }; #endif