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tpm: Adjust interface timeouts if they are too small
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / char / tpm / tpm.h
CommitLineData
1da177e4
LT		 1/*
2 * Copyright (C) 2004 IBM Corporation
3 *
4 * Authors:
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>
9 *
8e81cc13 10 * Maintained by: <tpmdd-devel@lists.sourceforge.net>
1da177e4
LT		 11 *
12 * Device driver for TCG/TCPA TPM (trusted platform module).
13 * Specifications at www.trustedcomputinggroup.org
14 *
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
18 * License.
19 *
20 */
21#include <linux/module.h>
1da177e4
LT		 22#include <linux/delay.h>
23#include <linux/fs.h>
d081d470 24#include <linux/mutex.h>
914e2637 25#include <linux/sched.h>
1da177e4 26#include <linux/miscdevice.h>
bbc5b212 27#include <linux/platform_device.h>
276ad0c1 28#include <linux/io.h>
659aaf2b 29#include <linux/tpm.h>
1da177e4 30
3122a88a
KH		 31enum tpm_timeout {
32 TPM_TIMEOUT = 5, /* msecs */
33};
1da177e4
LT		 34
35/* TPM addresses */
3122a88a 36enum tpm_addr {
daacdfa6 37 TPM_SUPERIO_ADDR = 0x2E,
3122a88a 38 TPM_ADDR = 0x4E,
3122a88a
KH		 39};
40
6659ca2a
KH		 41extern ssize_t tpm_show_pubek(struct device *, struct device_attribute *attr,
42 char *);
43extern ssize_t tpm_show_pcrs(struct device *, struct device_attribute *attr,
44 char *);
45extern ssize_t tpm_show_caps(struct device *, struct device_attribute *attr,
46 char *);
08e96e48
KJH		 47extern ssize_t tpm_show_caps_1_2(struct device *, struct device_attribute *attr,
48 char *);
6659ca2a
KH		 49extern ssize_t tpm_store_cancel(struct device *, struct device_attribute *attr,
50 const char *, size_t);
08e96e48
KJH		 51extern ssize_t tpm_show_enabled(struct device *, struct device_attribute *attr,
52 char *);
53extern ssize_t tpm_show_active(struct device *, struct device_attribute *attr,
54 char *);
55extern ssize_t tpm_show_owned(struct device *, struct device_attribute *attr,
56 char *);
57extern ssize_t tpm_show_temp_deactivated(struct device *,
58 struct device_attribute *attr, char *);
04ab2293
SB		 59extern ssize_t tpm_show_durations(struct device *,
60 struct device_attribute *attr, char *);
1da177e4
LT		 61
62struct tpm_chip;
63
64struct tpm_vendor_specific {
e0dd03ca
KJH		 65 const u8 req_complete_mask;
66 const u8 req_complete_val;
67 const u8 req_canceled;
ad5ea3cc
KJH		 68 void __iomem *iobase; /* ioremapped address */
69 unsigned long base; /* TPM base address */
70
27084efe
LD		 71 int irq;
72
ad5ea3cc
KJH		 73 int region_size;
74 int have_region;
1da177e4
LT		 75
76 int (*recv) (struct tpm_chip *, u8 *, size_t);
77 int (*send) (struct tpm_chip *, u8 *, size_t);
78 void (*cancel) (struct tpm_chip *);
b4ed3e3c 79 u8 (*status) (struct tpm_chip *);
5bd91f18 80 void (*release) (struct device *);
1da177e4 81 struct miscdevice miscdev;
6659ca2a 82 struct attribute_group *attr_group;
27084efe
LD		 83 struct list_head list;
84 int locality;
36b20020
KJH		 85 unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
86 unsigned long duration[3]; /* jiffies */
04ab2293 87 bool duration_adjusted;
27084efe
LD		 88
89 wait_queue_head_t read_queue;
90 wait_queue_head_t int_queue;
1da177e4
LT		 91};
92
93struct tpm_chip {
e659a3fe 94 struct device *dev; /* Device stuff */
1da177e4
LT		 95
96 int dev_num; /* /dev/tpm# */
dc36d32c 97 unsigned long is_open; /* only one allowed */
1da177e4
LT		 98 int time_expired;
99
100 /* Data passed to and from the tpm via the read/write calls */
101 u8 *data_buffer;
102 atomic_t data_pending;
d081d470 103 struct mutex buffer_mutex;
1da177e4
LT		 104
105 struct timer_list user_read_timer; /* user needs to claim result */
09e12f9f 106 struct work_struct work;
d081d470 107 struct mutex tpm_mutex; /* tpm is processing */
1da177e4 108
90dda520 109 struct tpm_vendor_specific vendor;
1da177e4 110
55a82ab3
KJH		 111 struct dentry **bios_dir;
112
1da177e4 113 struct list_head list;
5bd91f18 114 void (*release) (struct device *);
1da177e4
LT		 115};
116
27084efe
LD		 117#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
118
a0e39349
MZ		 119static inline void tpm_chip_put(struct tpm_chip *chip)
120{
121 module_put(chip->dev->driver->owner);
122}
123
daacdfa6 124static inline int tpm_read_index(int base, int index)
1da177e4 125{
daacdfa6
KJH		 126 outb(index, base);
127 return inb(base+1) & 0xFF;
1da177e4
LT		 128}
129
daacdfa6 130static inline void tpm_write_index(int base, int index, int value)
1da177e4 131{
daacdfa6
KJH		 132 outb(index, base);
133 outb(value & 0xFF, base+1);
1da177e4 134}
08837438
RA		 135struct tpm_input_header {
136 __be16 tag;
137 __be32 length;
138 __be32 ordinal;
139}__attribute__((packed));
140
141struct tpm_output_header {
142 __be16 tag;
143 __be32 length;
144 __be32 return_code;
145}__attribute__((packed));
146
147struct stclear_flags_t {
148 __be16 tag;
149 u8 deactivated;
150 u8 disableForceClear;
151 u8 physicalPresence;
152 u8 physicalPresenceLock;
153 u8 bGlobalLock;
154}__attribute__((packed));
155
156struct tpm_version_t {
157 u8 Major;
158 u8 Minor;
159 u8 revMajor;
160 u8 revMinor;
161}__attribute__((packed));
162
163struct tpm_version_1_2_t {
164 __be16 tag;
165 u8 Major;
166 u8 Minor;
167 u8 revMajor;
168 u8 revMinor;
169}__attribute__((packed));
170
171struct timeout_t {
172 __be32 a;
173 __be32 b;
174 __be32 c;
175 __be32 d;
176}__attribute__((packed));
177
178struct duration_t {
179 __be32 tpm_short;
180 __be32 tpm_medium;
181 __be32 tpm_long;
182}__attribute__((packed));
183
184struct permanent_flags_t {
185 __be16 tag;
186 u8 disable;
187 u8 ownership;
188 u8 deactivated;
189 u8 readPubek;
190 u8 disableOwnerClear;
191 u8 allowMaintenance;
192 u8 physicalPresenceLifetimeLock;
193 u8 physicalPresenceHWEnable;
194 u8 physicalPresenceCMDEnable;
195 u8 CEKPUsed;
196 u8 TPMpost;
197 u8 TPMpostLock;
198 u8 FIPS;
199 u8 operator;
200 u8 enableRevokeEK;
201 u8 nvLocked;
202 u8 readSRKPub;
203 u8 tpmEstablished;
204 u8 maintenanceDone;
205 u8 disableFullDALogicInfo;
206}__attribute__((packed));
207
208typedef union {
209 struct permanent_flags_t perm_flags;
210 struct stclear_flags_t stclear_flags;
211 bool owned;
212 __be32 num_pcrs;
213 struct tpm_version_t tpm_version;
214 struct tpm_version_1_2_t tpm_version_1_2;
215 __be32 manufacturer_id;
216 struct timeout_t timeout;
217 struct duration_t duration;
218} cap_t;
219
220struct tpm_getcap_params_in {
221 __be32 cap;
222 __be32 subcap_size;
223 __be32 subcap;
224}__attribute__((packed));
225
226struct tpm_getcap_params_out {
227 __be32 cap_size;
228 cap_t cap;
229}__attribute__((packed));
230
231struct tpm_readpubek_params_out {
232 u8 algorithm[4];
233 u8 encscheme[2];
234 u8 sigscheme[2];
02a077c5 235 __be32 paramsize;
08837438
RA		 236 u8 parameters[12]; /*assuming RSA*/
237 __be32 keysize;
238 u8 modulus[256];
239 u8 checksum[20];
240}__attribute__((packed));
241
242typedef union {
243 struct tpm_input_header in;
244 struct tpm_output_header out;
245} tpm_cmd_header;
246
659aaf2b
RA		 247#define TPM_DIGEST_SIZE 20
248struct tpm_pcrread_out {
249 u8 pcr_result[TPM_DIGEST_SIZE];
250}__attribute__((packed));
251
252struct tpm_pcrread_in {
253 __be32 pcr_idx;
254}__attribute__((packed));
255
256struct tpm_pcrextend_in {
257 __be32 pcr_idx;
258 u8 hash[TPM_DIGEST_SIZE];
259}__attribute__((packed));
260
08837438
RA		 261typedef union {
262 struct tpm_getcap_params_out getcap_out;
263 struct tpm_readpubek_params_out readpubek_out;
264 u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
265 struct tpm_getcap_params_in getcap_in;
659aaf2b
RA		 266 struct tpm_pcrread_in pcrread_in;
267 struct tpm_pcrread_out pcrread_out;
268 struct tpm_pcrextend_in pcrextend_in;
08837438
RA		 269} tpm_cmd_params;
270
271struct tpm_cmd_t {
272 tpm_cmd_header header;
273 tpm_cmd_params params;
274}__attribute__((packed));
275
276ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
1da177e4 277
08e96e48
KJH		 278extern void tpm_get_timeouts(struct tpm_chip *);
279extern void tpm_gen_interrupt(struct tpm_chip *);
280extern void tpm_continue_selftest(struct tpm_chip *);
9e18ee19 281extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
e0dd03ca
KJH		 282extern struct tpm_chip* tpm_register_hardware(struct device *,
283 const struct tpm_vendor_specific *);
1da177e4
LT		 284extern int tpm_open(struct inode *, struct file *);
285extern int tpm_release(struct inode *, struct file *);
253115b7 286extern void tpm_dev_vendor_release(struct tpm_chip *);
1da177e4
LT		 287extern ssize_t tpm_write(struct file *, const char __user *, size_t,
288 loff_t *);
289extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *);
e659a3fe 290extern void tpm_remove_hardware(struct device *);
ce2c87d4
KJH		 291extern int tpm_pm_suspend(struct device *, pm_message_t);
292extern int tpm_pm_resume(struct device *);
55a82ab3
KJH		 293
294#ifdef CONFIG_ACPI
295extern struct dentry ** tpm_bios_log_setup(char *);
296extern void tpm_bios_log_teardown(struct dentry **);
297#else
bb53a761 298static inline struct dentry ** tpm_bios_log_setup(char *name)
55a82ab3
KJH		 299{
300 return NULL;
301}
302static inline void tpm_bios_log_teardown(struct dentry **dir)
303{
304}
305#endif
kernel source for telekom puls (alcatel/mediatek)