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/miscdevice.h>
27 #include <linux/platform_device.h>
29 #include <linux/tpm.h>
32 TPM_MINOR = 224, /* officially assigned */
34 TPM_NUM_DEVICES = 256,
35 TPM_RETRY = 50, /* 5 seconds */
39 TPM_TIMEOUT = 5, /* msecs */
40 TPM_TIMEOUT_RETRY = 100 /* msecs */
45 TPM_SUPERIO_ADDR = 0x2E,
49 /* Indexes the duration array */
57 #define TPM_WARN_RETRY 0x800
58 #define TPM_WARN_DOING_SELFTEST 0x802
59 #define TPM_ERR_DEACTIVATED 0x6
60 #define TPM_ERR_DISABLED 0x7
61 #define TPM_ERR_INVALID_POSTINIT 38
63 #define TPM_HEADER_SIZE 10
66 struct tpm_vendor_specific {
67 void __iomem *iobase; /* ioremapped address */
68 unsigned long base; /* TPM base address */
76 struct miscdevice miscdev;
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
98 struct device *dev; /* Device stuff */
99 const struct tpm_class_ops *ops;
101 int dev_num; /* /dev/tpm# */
103 unsigned long is_open; /* only one allowed */
106 struct mutex tpm_mutex; /* tpm is processing */
108 struct tpm_vendor_specific vendor;
110 struct dentry **bios_dir;
112 struct list_head list;
113 void (*release) (struct device *);
116 #define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
118 static inline void tpm_chip_put(struct tpm_chip *chip)
120 module_put(chip->dev->driver->owner);
123 static inline int tpm_read_index(int base, int index)
126 return inb(base+1) & 0xFF;
129 static inline void tpm_write_index(int base, int index, int value)
132 outb(value & 0xFF, base+1);
134 struct tpm_input_header {
140 struct tpm_output_header {
146 #define TPM_TAG_RQU_COMMAND cpu_to_be16(193)
148 struct stclear_flags_t {
151 u8 disableForceClear;
153 u8 physicalPresenceLock;
157 struct tpm_version_t {
164 struct tpm_version_1_2_t {
185 struct permanent_flags_t {
191 u8 disableOwnerClear;
193 u8 physicalPresenceLifetimeLock;
194 u8 physicalPresenceHWEnable;
195 u8 physicalPresenceCMDEnable;
206 u8 disableFullDALogicInfo;
210 struct permanent_flags_t perm_flags;
211 struct stclear_flags_t stclear_flags;
214 struct tpm_version_t tpm_version;
215 struct tpm_version_1_2_t tpm_version_1_2;
216 __be32 manufacturer_id;
217 struct timeout_t timeout;
218 struct duration_t duration;
221 enum tpm_capabilities {
222 TPM_CAP_FLAG = cpu_to_be32(4),
223 TPM_CAP_PROP = cpu_to_be32(5),
224 CAP_VERSION_1_1 = cpu_to_be32(0x06),
225 CAP_VERSION_1_2 = cpu_to_be32(0x1A)
228 enum tpm_sub_capabilities {
229 TPM_CAP_PROP_PCR = cpu_to_be32(0x101),
230 TPM_CAP_PROP_MANUFACTURER = cpu_to_be32(0x103),
231 TPM_CAP_FLAG_PERM = cpu_to_be32(0x108),
232 TPM_CAP_FLAG_VOL = cpu_to_be32(0x109),
233 TPM_CAP_PROP_OWNER = cpu_to_be32(0x111),
234 TPM_CAP_PROP_TIS_TIMEOUT = cpu_to_be32(0x115),
235 TPM_CAP_PROP_TIS_DURATION = cpu_to_be32(0x120),
239 struct tpm_getcap_params_in {
245 struct tpm_getcap_params_out {
250 struct tpm_readpubek_params_out {
255 u8 parameters[12]; /*assuming RSA*/
262 struct tpm_input_header in;
263 struct tpm_output_header out;
266 struct tpm_pcrread_out {
267 u8 pcr_result[TPM_DIGEST_SIZE];
270 struct tpm_pcrread_in {
274 struct tpm_pcrextend_in {
276 u8 hash[TPM_DIGEST_SIZE];
279 /* 128 bytes is an arbitrary cap. This could be as large as TPM_BUFSIZE - 18
280 * bytes, but 128 is still a relatively large number of random bytes and
281 * anything much bigger causes users of struct tpm_cmd_t to start getting
282 * compiler warnings about stack frame size. */
283 #define TPM_MAX_RNG_DATA 128
285 struct tpm_getrandom_out {
287 u8 rng_data[TPM_MAX_RNG_DATA];
290 struct tpm_getrandom_in {
294 struct tpm_startup_in {
299 struct tpm_getcap_params_out getcap_out;
300 struct tpm_readpubek_params_out readpubek_out;
301 u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
302 struct tpm_getcap_params_in getcap_in;
303 struct tpm_pcrread_in pcrread_in;
304 struct tpm_pcrread_out pcrread_out;
305 struct tpm_pcrextend_in pcrextend_in;
306 struct tpm_getrandom_in getrandom_in;
307 struct tpm_getrandom_out getrandom_out;
308 struct tpm_startup_in startup_in;
312 tpm_cmd_header header;
313 tpm_cmd_params params;
316 ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
318 ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
320 extern int tpm_get_timeouts(struct tpm_chip *);
321 extern void tpm_gen_interrupt(struct tpm_chip *);
322 extern int tpm_do_selftest(struct tpm_chip *);
323 extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
324 extern struct tpm_chip* tpm_register_hardware(struct device *,
325 const struct tpm_class_ops *ops);
326 extern void tpm_dev_vendor_release(struct tpm_chip *);
327 extern void tpm_remove_hardware(struct device *);
328 extern int tpm_pm_suspend(struct device *);
329 extern int tpm_pm_resume(struct device *);
330 extern int wait_for_tpm_stat(struct tpm_chip *, u8, unsigned long,
331 wait_queue_head_t *, bool);
333 int tpm_dev_add_device(struct tpm_chip *chip);
334 void tpm_dev_del_device(struct tpm_chip *chip);
335 int tpm_sysfs_add_device(struct tpm_chip *chip);
336 void tpm_sysfs_del_device(struct tpm_chip *chip);
338 int tpm_pcr_read_dev(struct tpm_chip *chip, int pcr_idx, u8 *res_buf);
341 extern int tpm_add_ppi(struct kobject *);
342 extern void tpm_remove_ppi(struct kobject *);
344 static inline int tpm_add_ppi(struct kobject *parent)
349 static inline void tpm_remove_ppi(struct kobject *parent)