2 * Copyright (C) 2004 IBM Corporation
5 * Leendert van Doorn <leendert@watson.ibm.com>
6 * Dave Safford <safford@watson.ibm.com>
7 * Reiner Sailer <sailer@watson.ibm.com>
8 * Kylene Hall <kjhall@us.ibm.com>
10 * Maintained by: <tpmdd-devel@lists.sourceforge.net>
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 struct tpm_vendor_specific {
68 void __iomem *iobase; /* ioremapped address */
69 unsigned long base; /* TPM base address */
77 struct list_head list;
79 unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
80 bool timeout_adjusted;
81 unsigned long duration[3]; /* jiffies */
82 bool duration_adjusted;
85 wait_queue_head_t read_queue;
86 wait_queue_head_t int_queue;
91 #define TPM_VPRIV(c) (c)->vendor.priv
93 #define TPM_VID_INTEL 0x8086
94 #define TPM_VID_WINBOND 0x1050
95 #define TPM_VID_STM 0x104A
97 #define TPM_PPI_VERSION_LEN 3
100 TPM_CHIP_FLAG_REGISTERED = BIT(0),
101 TPM_CHIP_FLAG_PPI = BIT(1),
105 struct device *pdev; /* Device stuff */
109 const struct tpm_class_ops *ops;
112 int dev_num; /* /dev/tpm# */
114 unsigned long is_open; /* only one allowed */
117 struct mutex tpm_mutex; /* tpm is processing */
119 struct tpm_vendor_specific vendor;
121 struct dentry **bios_dir;
124 acpi_handle acpi_dev_handle;
125 char ppi_version[TPM_PPI_VERSION_LEN + 1];
126 #endif /* CONFIG_ACPI */
128 struct list_head list;
131 #define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
133 static inline void tpm_chip_put(struct tpm_chip *chip)
135 module_put(chip->pdev->driver->owner);
138 static inline int tpm_read_index(int base, int index)
141 return inb(base+1) & 0xFF;
144 static inline void tpm_write_index(int base, int index, int value)
147 outb(value & 0xFF, base+1);
149 struct tpm_input_header {
155 struct tpm_output_header {
161 #define TPM_TAG_RQU_COMMAND cpu_to_be16(193)
163 struct stclear_flags_t {
166 u8 disableForceClear;
168 u8 physicalPresenceLock;
172 struct tpm_version_t {
179 struct tpm_version_1_2_t {
200 struct permanent_flags_t {
206 u8 disableOwnerClear;
208 u8 physicalPresenceLifetimeLock;
209 u8 physicalPresenceHWEnable;
210 u8 physicalPresenceCMDEnable;
221 u8 disableFullDALogicInfo;
225 struct permanent_flags_t perm_flags;
226 struct stclear_flags_t stclear_flags;
229 struct tpm_version_t tpm_version;
230 struct tpm_version_1_2_t tpm_version_1_2;
231 __be32 manufacturer_id;
232 struct timeout_t timeout;
233 struct duration_t duration;
236 enum tpm_capabilities {
237 TPM_CAP_FLAG = cpu_to_be32(4),
238 TPM_CAP_PROP = cpu_to_be32(5),
239 CAP_VERSION_1_1 = cpu_to_be32(0x06),
240 CAP_VERSION_1_2 = cpu_to_be32(0x1A)
243 enum tpm_sub_capabilities {
244 TPM_CAP_PROP_PCR = cpu_to_be32(0x101),
245 TPM_CAP_PROP_MANUFACTURER = cpu_to_be32(0x103),
246 TPM_CAP_FLAG_PERM = cpu_to_be32(0x108),
247 TPM_CAP_FLAG_VOL = cpu_to_be32(0x109),
248 TPM_CAP_PROP_OWNER = cpu_to_be32(0x111),
249 TPM_CAP_PROP_TIS_TIMEOUT = cpu_to_be32(0x115),
250 TPM_CAP_PROP_TIS_DURATION = cpu_to_be32(0x120),
254 struct tpm_getcap_params_in {
260 struct tpm_getcap_params_out {
265 struct tpm_readpubek_params_out {
270 u8 parameters[12]; /*assuming RSA*/
277 struct tpm_input_header in;
278 struct tpm_output_header out;
281 struct tpm_pcrread_out {
282 u8 pcr_result[TPM_DIGEST_SIZE];
285 struct tpm_pcrread_in {
289 struct tpm_pcrextend_in {
291 u8 hash[TPM_DIGEST_SIZE];
294 /* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
295 * bytes, but 128 is still a relatively large number of random bytes and
296 * anything much bigger causes users of struct tpm_cmd_t to start getting
297 * compiler warnings about stack frame size. */
298 #define TPM_MAX_RNG_DATA 128
300 struct tpm_getrandom_out {
302 u8 rng_data[TPM_MAX_RNG_DATA];
305 struct tpm_getrandom_in {
309 struct tpm_startup_in {
314 struct tpm_getcap_params_out getcap_out;
315 struct tpm_readpubek_params_out readpubek_out;
316 u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
317 struct tpm_getcap_params_in getcap_in;
318 struct tpm_pcrread_in pcrread_in;
319 struct tpm_pcrread_out pcrread_out;
320 struct tpm_pcrextend_in pcrextend_in;
321 struct tpm_getrandom_in getrandom_in;
322 struct tpm_getrandom_out getrandom_out;
323 struct tpm_startup_in startup_in;
327 tpm_cmd_header header;
328 tpm_cmd_params params;
331 extern struct class *tpm_class;
332 extern dev_t tpm_devt;
333 extern const struct file_operations tpm_fops;
335 ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
336 ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
338 ssize_t tpm_transmit_cmd(struct tpm_chip *chip, void *cmd, int len,
340 extern int tpm_get_timeouts(struct tpm_chip *);
341 extern void tpm_gen_interrupt(struct tpm_chip *);
342 extern int tpm_do_selftest(struct tpm_chip *);
343 extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
344 extern int tpm_pm_suspend(struct device *);
345 extern int tpm_pm_resume(struct device *);
346 extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long,
347 wait_queue_head_t *, bool);
349 struct tpm_chip *tpm_chip_find_get(int chip_num);
350 extern struct tpm_chip *tpmm_chip_alloc(struct device *dev,
351 const struct tpm_class_ops *ops);
352 extern int tpm_chip_register(struct tpm_chip *chip);
353 extern void tpm_chip_unregister(struct tpm_chip *chip);
355 int tpm_sysfs_add_device(struct tpm_chip *chip);
356 void tpm_sysfs_del_device(struct tpm_chip *chip);
358 int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
361 extern int tpm_add_ppi(struct tpm_chip *chip);
362 extern void tpm_remove_ppi(struct tpm_chip *chip);
364 static inline int tpm_add_ppi(struct tpm_chip *chip)
369 static inline void tpm_remove_ppi(struct tpm_chip *chip)