2 * Copyright (C) 2004 IBM Corporation
12 * Device driver for TCG/TCPA TPM (trusted platform module).
13 * Specifications at www.trustedcomputinggroup.org
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License as
17 * published by the Free Software Foundation, version 2 of the
21 #include <linux/module.h>
22 #include <linux/delay.h>
24 #include <linux/mutex.h>
25 #include <linux/sched.h>
26 #include <linux/platform_device.h>
28 #include <linux/tpm.h>
29 #include <linux/acpi.h>
30 #include <linux/cdev.h>
33 TPM_MINOR = 224, /* officially assigned */
35 TPM_NUM_DEVICES = 256,
36 TPM_RETRY = 50, /* 5 seconds */
40 TPM_TIMEOUT = 5, /* msecs */
41 TPM_TIMEOUT_RETRY = 100 /* msecs */
46 TPM_SUPERIO_ADDR = 0x2E,
50 /* Indexes the duration array */
58 #define TPM_WARN_RETRY 0x800
59 #define TPM_WARN_DOING_SELFTEST 0x802
60 #define TPM_ERR_DEACTIVATED 0x6
61 #define TPM_ERR_DISABLED 0x7
62 #define TPM_ERR_INVALID_POSTINIT 38
64 #define TPM_HEADER_SIZE 10
67 TPM2_PLATFORM_PCR = 24,
68 TPM2_PCR_SELECT_MIN = ((TPM2_PLATFORM_PCR + 7) / 8),
70 TPM2_TIMEOUT_B = 2000,
73 TPM2_DURATION_SHORT = 20,
74 TPM2_DURATION_MEDIUM = 750,
75 TPM2_DURATION_LONG = 2000,
78 enum tpm2_structures {
79 TPM2_ST_NO_SESSIONS = 0x8001,
80 TPM2_ST_SESSIONS = 0x8002,
83 enum tpm2_return_codes {
84 TPM2_RC_INITIALIZE = 0x0100,
85 TPM2_RC_TESTING = 0x090A,
86 TPM2_RC_DISABLED = 0x0120,
89 enum tpm2_algorithms {
90 TPM2_ALG_SHA1 = 0x0004,
93 enum tpm2_command_codes {
94 TPM2_CC_FIRST = 0x011F,
95 TPM2_CC_SELF_TEST = 0x0143,
96 TPM2_CC_STARTUP = 0x0144,
97 TPM2_CC_SHUTDOWN = 0x0145,
98 TPM2_CC_GET_CAPABILITY = 0x017A,
99 TPM2_CC_GET_RANDOM = 0x017B,
100 TPM2_CC_PCR_READ = 0x017E,
101 TPM2_CC_PCR_EXTEND = 0x0182,
102 TPM2_CC_LAST = 0x018F,
105 enum tpm2_permanent_handles {
106 TPM2_RS_PW = 0x40000009,
109 enum tpm2_capabilities {
110 TPM2_CAP_TPM_PROPERTIES = 6,
113 enum tpm2_startup_types {
114 TPM2_SU_CLEAR = 0x0000,
115 TPM2_SU_STATE = 0x0001,
120 struct tpm_vendor_specific {
121 void __iomem *iobase; /* ioremapped address */
122 unsigned long base; /* TPM base address */
130 struct list_head list;
132 unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
133 bool timeout_adjusted;
134 unsigned long duration[3]; /* jiffies */
135 bool duration_adjusted;
138 wait_queue_head_t read_queue;
139 wait_queue_head_t int_queue;
144 #define TPM_VPRIV(c) ((c)->vendor.priv)
146 #define TPM_VID_INTEL 0x8086
147 #define TPM_VID_WINBOND 0x1050
148 #define TPM_VID_STM 0x104A
150 #define TPM_PPI_VERSION_LEN 3
152 enum tpm_chip_flags {
153 TPM_CHIP_FLAG_REGISTERED = BIT(0),
154 TPM_CHIP_FLAG_PPI = BIT(1),
155 TPM_CHIP_FLAG_TPM2 = BIT(2),
159 struct device *pdev; /* Device stuff */
163 const struct tpm_class_ops *ops;
166 int dev_num; /* /dev/tpm# */
168 unsigned long is_open; /* only one allowed */
171 struct mutex tpm_mutex; /* tpm is processing */
173 struct tpm_vendor_specific vendor;
175 struct dentry **bios_dir;
178 acpi_handle acpi_dev_handle;
179 char ppi_version[TPM_PPI_VERSION_LEN + 1];
180 #endif /* CONFIG_ACPI */
182 struct list_head list;
185 #define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
187 static inline void tpm_chip_put(struct tpm_chip *chip)
189 module_put(chip->pdev->driver->owner);
192 static inline int tpm_read_index(int base, int index)
195 return inb(base+1) & 0xFF;
198 static inline void tpm_write_index(int base, int index, int value)
201 outb(value & 0xFF, base+1);
203 struct tpm_input_header {
209 struct tpm_output_header {
215 #define TPM_TAG_RQU_COMMAND cpu_to_be16(193)
217 struct stclear_flags_t {
220 u8 disableForceClear;
222 u8 physicalPresenceLock;
226 struct tpm_version_t {
233 struct tpm_version_1_2_t {
254 struct permanent_flags_t {
260 u8 disableOwnerClear;
262 u8 physicalPresenceLifetimeLock;
263 u8 physicalPresenceHWEnable;
264 u8 physicalPresenceCMDEnable;
275 u8 disableFullDALogicInfo;
279 struct permanent_flags_t perm_flags;
280 struct stclear_flags_t stclear_flags;
283 struct tpm_version_t tpm_version;
284 struct tpm_version_1_2_t tpm_version_1_2;
285 __be32 manufacturer_id;
286 struct timeout_t timeout;
287 struct duration_t duration;
290 enum tpm_capabilities {
291 TPM_CAP_FLAG = cpu_to_be32(4),
292 TPM_CAP_PROP = cpu_to_be32(5),
293 CAP_VERSION_1_1 = cpu_to_be32(0x06),
294 CAP_VERSION_1_2 = cpu_to_be32(0x1A)
297 enum tpm_sub_capabilities {
298 TPM_CAP_PROP_PCR = cpu_to_be32(0x101),
299 TPM_CAP_PROP_MANUFACTURER = cpu_to_be32(0x103),
300 TPM_CAP_FLAG_PERM = cpu_to_be32(0x108),
301 TPM_CAP_FLAG_VOL = cpu_to_be32(0x109),
302 TPM_CAP_PROP_OWNER = cpu_to_be32(0x111),
303 TPM_CAP_PROP_TIS_TIMEOUT = cpu_to_be32(0x115),
304 TPM_CAP_PROP_TIS_DURATION = cpu_to_be32(0x120),
308 struct tpm_getcap_params_in {
314 struct tpm_getcap_params_out {
319 struct tpm_readpubek_params_out {
324 u8 parameters[12]; /*assuming RSA*/
331 struct tpm_input_header in;
332 struct tpm_output_header out;
335 struct tpm_pcrread_out {
336 u8 pcr_result[TPM_DIGEST_SIZE];
339 struct tpm_pcrread_in {
343 struct tpm_pcrextend_in {
345 u8 hash[TPM_DIGEST_SIZE];
348 /* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
349 * bytes, but 128 is still a relatively large number of random bytes and
350 * anything much bigger causes users of struct tpm_cmd_t to start getting
351 * compiler warnings about stack frame size. */
352 #define TPM_MAX_RNG_DATA 128
354 struct tpm_getrandom_out {
356 u8 rng_data[TPM_MAX_RNG_DATA];
359 struct tpm_getrandom_in {
363 struct tpm_startup_in {
368 struct tpm_getcap_params_out getcap_out;
369 struct tpm_readpubek_params_out readpubek_out;
370 u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
371 struct tpm_getcap_params_in getcap_in;
372 struct tpm_pcrread_in pcrread_in;
373 struct tpm_pcrread_out pcrread_out;
374 struct tpm_pcrextend_in pcrextend_in;
375 struct tpm_getrandom_in getrandom_in;
376 struct tpm_getrandom_out getrandom_out;
377 struct tpm_startup_in startup_in;
381 tpm_cmd_header header;
382 tpm_cmd_params params;
385 extern struct class *tpm_class;
386 extern dev_t tpm_devt;
387 extern const struct file_operations tpm_fops;
389 ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
390 ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
392 ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd, int len,
394 extern int tpm_get_timeouts(struct tpm_chip *);
395 extern void tpm_gen_interrupt(struct tpm_chip *);
396 extern int tpm_do_selftest(struct tpm_chip *);
397 extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
398 extern int tpm_pm_suspend(struct device *);
399 extern int tpm_pm_resume(struct device *);
400 extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long,
401 wait_queue_head_t *, bool);
403 struct tpm_chip *tpm_chip_find_get(int chip_num);
404 extern struct tpm_chip *tpmm_chip_alloc(struct device *dev,
405 const struct tpm_class_ops *ops);
406 extern int tpm_chip_register(struct tpm_chip *chip);
407 extern void tpm_chip_unregister(struct tpm_chip *chip);
409 int tpm_sysfs_add_device(struct tpm_chip *chip);
410 void tpm_sysfs_del_device(struct tpm_chip *chip);
412 int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
415 extern int tpm_add_ppi(struct tpm_chip *chip);
416 extern void tpm_remove_ppi(struct tpm_chip *chip);
418 static inline int tpm_add_ppi(struct tpm_chip *chip)
423 static inline void tpm_remove_ppi(struct tpm_chip *chip)
428 int tpm2_pcr_read(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
429 int tpm2_pcr_extend(struct tpm_chip *chip, int pcr_idx, const u8 *hash);
430 int tpm2_get_random(struct tpm_chip *chip, u8 *out, size_t max);
431 ssize_t tpm2_get_tpm_pt(struct tpm_chip *chip, u32 property_id,
432 u32 *value, const char *desc);
434 extern int tpm2_startup(struct tpm_chip *chip, u16 startup_type);
435 extern void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type);
436 extern unsigned long tpm2_calc_ordinal_duration(struct tpm_chip *, u32);
437 extern int tpm2_do_selftest(struct tpm_chip *chip);
438 extern int tpm2_gen_interrupt(struct tpm_chip *chip);
439 extern int tpm2_probe(struct tpm_chip *chip);