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tpm_bios.c: make 2 structs static
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / char / tpm / tpm.c
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 * Note, the TPM chip is not interrupt driven (only polling)
21 * and can have very long timeouts (minutes!). Hence the unusual
700d8bdc 22 * calls to msleep.
1da177e4
LT		 23 *
24 */
25
1da177e4 26#include <linux/poll.h>
d081d470 27#include <linux/mutex.h>
1da177e4 28#include <linux/spinlock.h>
25368ca5 29#include <linux/smp_lock.h>
d081d470 30
1da177e4
LT		 31#include "tpm.h"
32
3122a88a
KH		 33enum tpm_const {
34 TPM_MINOR = 224, /* officially assigned */
35 TPM_BUFSIZE = 2048,
36 TPM_NUM_DEVICES = 256,
3122a88a 37};
1da177e4 38
9e18ee19
KJH		 39enum tpm_duration {
40 TPM_SHORT = 0,
41 TPM_MEDIUM = 1,
42 TPM_LONG = 2,
43 TPM_UNDEFINED,
44};
45
46#define TPM_MAX_ORDINAL 243
47#define TPM_MAX_PROTECTED_ORDINAL 12
48#define TPM_PROTECTED_ORDINAL_MASK 0xFF
49
1da177e4
LT		 50static LIST_HEAD(tpm_chip_list);
51static DEFINE_SPINLOCK(driver_lock);
10685a95 52static DECLARE_BITMAP(dev_mask, TPM_NUM_DEVICES);
1da177e4 53
9e18ee19
KJH		 54/*
55 * Array with one entry per ordinal defining the maximum amount
56 * of time the chip could take to return the result. The ordinal
57 * designation of short, medium or long is defined in a table in
58 * TCG Specification TPM Main Part 2 TPM Structures Section 17. The
59 * values of the SHORT, MEDIUM, and LONG durations are retrieved
60 * from the chip during initialization with a call to tpm_get_timeouts.
61 */
62static const u8 tpm_protected_ordinal_duration[TPM_MAX_PROTECTED_ORDINAL] = {
63 TPM_UNDEFINED, /* 0 */
64 TPM_UNDEFINED,
65 TPM_UNDEFINED,
66 TPM_UNDEFINED,
67 TPM_UNDEFINED,
68 TPM_UNDEFINED, /* 5 */
69 TPM_UNDEFINED,
70 TPM_UNDEFINED,
71 TPM_UNDEFINED,
72 TPM_UNDEFINED,
73 TPM_SHORT, /* 10 */
74 TPM_SHORT,
75};
76
77static const u8 tpm_ordinal_duration[TPM_MAX_ORDINAL] = {
78 TPM_UNDEFINED, /* 0 */
79 TPM_UNDEFINED,
80 TPM_UNDEFINED,
81 TPM_UNDEFINED,
82 TPM_UNDEFINED,
83 TPM_UNDEFINED, /* 5 */
84 TPM_UNDEFINED,
85 TPM_UNDEFINED,
86 TPM_UNDEFINED,
87 TPM_UNDEFINED,
88 TPM_SHORT, /* 10 */
89 TPM_SHORT,
90 TPM_MEDIUM,
91 TPM_LONG,
92 TPM_LONG,
93 TPM_MEDIUM, /* 15 */
94 TPM_SHORT,
95 TPM_SHORT,
96 TPM_MEDIUM,
97 TPM_LONG,
98 TPM_SHORT, /* 20 */
99 TPM_SHORT,
100 TPM_MEDIUM,
101 TPM_MEDIUM,
102 TPM_MEDIUM,
103 TPM_SHORT, /* 25 */
104 TPM_SHORT,
105 TPM_MEDIUM,
106 TPM_SHORT,
107 TPM_SHORT,
108 TPM_MEDIUM, /* 30 */
109 TPM_LONG,
110 TPM_MEDIUM,
111 TPM_SHORT,
112 TPM_SHORT,
113 TPM_SHORT, /* 35 */
114 TPM_MEDIUM,
115 TPM_MEDIUM,
116 TPM_UNDEFINED,
117 TPM_UNDEFINED,
118 TPM_MEDIUM, /* 40 */
119 TPM_LONG,
120 TPM_MEDIUM,
121 TPM_SHORT,
122 TPM_SHORT,
123 TPM_SHORT, /* 45 */
124 TPM_SHORT,
125 TPM_SHORT,
126 TPM_SHORT,
127 TPM_LONG,
128 TPM_MEDIUM, /* 50 */
129 TPM_MEDIUM,
130 TPM_UNDEFINED,
131 TPM_UNDEFINED,
132 TPM_UNDEFINED,
133 TPM_UNDEFINED, /* 55 */
134 TPM_UNDEFINED,
135 TPM_UNDEFINED,
136 TPM_UNDEFINED,
137 TPM_UNDEFINED,
138 TPM_MEDIUM, /* 60 */
139 TPM_MEDIUM,
140 TPM_MEDIUM,
141 TPM_SHORT,
142 TPM_SHORT,
143 TPM_MEDIUM, /* 65 */
144 TPM_UNDEFINED,
145 TPM_UNDEFINED,
146 TPM_UNDEFINED,
147 TPM_UNDEFINED,
148 TPM_SHORT, /* 70 */
149 TPM_SHORT,
150 TPM_UNDEFINED,
151 TPM_UNDEFINED,
152 TPM_UNDEFINED,
153 TPM_UNDEFINED, /* 75 */
154 TPM_UNDEFINED,
155 TPM_UNDEFINED,
156 TPM_UNDEFINED,
157 TPM_UNDEFINED,
158 TPM_LONG, /* 80 */
159 TPM_UNDEFINED,
160 TPM_MEDIUM,
161 TPM_LONG,
162 TPM_SHORT,
163 TPM_UNDEFINED, /* 85 */
164 TPM_UNDEFINED,
165 TPM_UNDEFINED,
166 TPM_UNDEFINED,
167 TPM_UNDEFINED,
168 TPM_SHORT, /* 90 */
169 TPM_SHORT,
170 TPM_SHORT,
171 TPM_SHORT,
172 TPM_SHORT,
173 TPM_UNDEFINED, /* 95 */
174 TPM_UNDEFINED,
175 TPM_UNDEFINED,
176 TPM_UNDEFINED,
177 TPM_UNDEFINED,
178 TPM_MEDIUM, /* 100 */
179 TPM_SHORT,
180 TPM_SHORT,
181 TPM_UNDEFINED,
182 TPM_UNDEFINED,
183 TPM_UNDEFINED, /* 105 */
184 TPM_UNDEFINED,
185 TPM_UNDEFINED,
186 TPM_UNDEFINED,
187 TPM_UNDEFINED,
188 TPM_SHORT, /* 110 */
189 TPM_SHORT,
190 TPM_SHORT,
191 TPM_SHORT,
192 TPM_SHORT,
193 TPM_SHORT, /* 115 */
194 TPM_SHORT,
195 TPM_SHORT,
196 TPM_UNDEFINED,
197 TPM_UNDEFINED,
198 TPM_LONG, /* 120 */
199 TPM_LONG,
200 TPM_MEDIUM,
201 TPM_UNDEFINED,
202 TPM_SHORT,
203 TPM_SHORT, /* 125 */
204 TPM_SHORT,
205 TPM_LONG,
206 TPM_SHORT,
207 TPM_SHORT,
208 TPM_SHORT, /* 130 */
209 TPM_MEDIUM,
210 TPM_UNDEFINED,
211 TPM_SHORT,
212 TPM_MEDIUM,
213 TPM_UNDEFINED, /* 135 */
214 TPM_UNDEFINED,
215 TPM_UNDEFINED,
216 TPM_UNDEFINED,
217 TPM_UNDEFINED,
218 TPM_SHORT, /* 140 */
219 TPM_SHORT,
220 TPM_UNDEFINED,
221 TPM_UNDEFINED,
222 TPM_UNDEFINED,
223 TPM_UNDEFINED, /* 145 */
224 TPM_UNDEFINED,
225 TPM_UNDEFINED,
226 TPM_UNDEFINED,
227 TPM_UNDEFINED,
228 TPM_SHORT, /* 150 */
229 TPM_MEDIUM,
230 TPM_MEDIUM,
231 TPM_SHORT,
232 TPM_SHORT,
233 TPM_UNDEFINED, /* 155 */
234 TPM_UNDEFINED,
235 TPM_UNDEFINED,
236 TPM_UNDEFINED,
237 TPM_UNDEFINED,
238 TPM_SHORT, /* 160 */
239 TPM_SHORT,
240 TPM_SHORT,
241 TPM_SHORT,
242 TPM_UNDEFINED,
243 TPM_UNDEFINED, /* 165 */
244 TPM_UNDEFINED,
245 TPM_UNDEFINED,
246 TPM_UNDEFINED,
247 TPM_UNDEFINED,
248 TPM_LONG, /* 170 */
249 TPM_UNDEFINED,
250 TPM_UNDEFINED,
251 TPM_UNDEFINED,
252 TPM_UNDEFINED,
253 TPM_UNDEFINED, /* 175 */
254 TPM_UNDEFINED,
255 TPM_UNDEFINED,
256 TPM_UNDEFINED,
257 TPM_UNDEFINED,
258 TPM_MEDIUM, /* 180 */
259 TPM_SHORT,
260 TPM_MEDIUM,
261 TPM_MEDIUM,
262 TPM_MEDIUM,
263 TPM_MEDIUM, /* 185 */
264 TPM_SHORT,
265 TPM_UNDEFINED,
266 TPM_UNDEFINED,
267 TPM_UNDEFINED,
268 TPM_UNDEFINED, /* 190 */
269 TPM_UNDEFINED,
270 TPM_UNDEFINED,
271 TPM_UNDEFINED,
272 TPM_UNDEFINED,
273 TPM_UNDEFINED, /* 195 */
274 TPM_UNDEFINED,
275 TPM_UNDEFINED,
276 TPM_UNDEFINED,
277 TPM_UNDEFINED,
278 TPM_SHORT, /* 200 */
279 TPM_UNDEFINED,
280 TPM_UNDEFINED,
281 TPM_UNDEFINED,
282 TPM_SHORT,
283 TPM_SHORT, /* 205 */
284 TPM_SHORT,
285 TPM_SHORT,
286 TPM_SHORT,
287 TPM_SHORT,
288 TPM_MEDIUM, /* 210 */
289 TPM_UNDEFINED,
290 TPM_MEDIUM,
291 TPM_MEDIUM,
292 TPM_MEDIUM,
293 TPM_UNDEFINED, /* 215 */
294 TPM_MEDIUM,
295 TPM_UNDEFINED,
296 TPM_UNDEFINED,
297 TPM_SHORT,
298 TPM_SHORT, /* 220 */
299 TPM_SHORT,
300 TPM_SHORT,
301 TPM_SHORT,
302 TPM_SHORT,
303 TPM_UNDEFINED, /* 225 */
304 TPM_UNDEFINED,
305 TPM_UNDEFINED,
306 TPM_UNDEFINED,
307 TPM_UNDEFINED,
308 TPM_SHORT, /* 230 */
309 TPM_LONG,
310 TPM_MEDIUM,
311 TPM_UNDEFINED,
312 TPM_UNDEFINED,
313 TPM_UNDEFINED, /* 235 */
314 TPM_UNDEFINED,
315 TPM_UNDEFINED,
316 TPM_UNDEFINED,
317 TPM_UNDEFINED,
318 TPM_SHORT, /* 240 */
319 TPM_UNDEFINED,
320 TPM_MEDIUM,
321};
322
1da177e4
LT		 323static void user_reader_timeout(unsigned long ptr)
324{
325 struct tpm_chip *chip = (struct tpm_chip *) ptr;
326
09e12f9f
KJH		 327 schedule_work(&chip->work);
328}
329
c4028958 330static void timeout_work(struct work_struct *work)
09e12f9f 331{
c4028958 332 struct tpm_chip *chip = container_of(work, struct tpm_chip, work);
09e12f9f 333
d081d470 334 mutex_lock(&chip->buffer_mutex);
1da177e4
LT		 335 atomic_set(&chip->data_pending, 0);
336 memset(chip->data_buffer, 0, TPM_BUFSIZE);
d081d470 337 mutex_unlock(&chip->buffer_mutex);
1da177e4
LT		 338}
339
9e18ee19
KJH		 340/*
341 * Returns max number of jiffies to wait
342 */
343unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip,
344 u32 ordinal)
345{
346 int duration_idx = TPM_UNDEFINED;
347 int duration = 0;
348
349 if (ordinal < TPM_MAX_ORDINAL)
350 duration_idx = tpm_ordinal_duration[ordinal];
351 else if ((ordinal & TPM_PROTECTED_ORDINAL_MASK) <
352 TPM_MAX_PROTECTED_ORDINAL)
353 duration_idx =
354 tpm_protected_ordinal_duration[ordinal &
355 TPM_PROTECTED_ORDINAL_MASK];
356
357 if (duration_idx != TPM_UNDEFINED)
36b20020 358 duration = chip->vendor.duration[duration_idx];
9e18ee19
KJH		 359 if (duration <= 0)
360 return 2 * 60 * HZ;
361 else
362 return duration;
363}
364EXPORT_SYMBOL_GPL(tpm_calc_ordinal_duration);
365
1da177e4
LT		 366/*
367 * Internal kernel interface to transmit TPM commands
368 */
369static ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
370 size_t bufsiz)
371{
d9e5b6bf 372 ssize_t rc;
9e18ee19 373 u32 count, ordinal;
700d8bdc 374 unsigned long stop;
1da177e4 375
81179bb6 376 count = be32_to_cpu(*((__be32 *) (buf + 2)));
9e18ee19 377 ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
1da177e4
LT		 378 if (count == 0)
379 return -ENODATA;
380 if (count > bufsiz) {
e659a3fe 381 dev_err(chip->dev,
b76be681 382 "invalid count value %x %zx \n", count, bufsiz);
1da177e4
LT		 383 return -E2BIG;
384 }
385
d081d470 386 mutex_lock(&chip->tpm_mutex);
1da177e4 387
90dda520 388 if ((rc = chip->vendor.send(chip, (u8 *) buf, count)) < 0) {
e659a3fe 389 dev_err(chip->dev,
d9e5b6bf
KH		 390 "tpm_transmit: tpm_send: error %zd\n", rc);
391 goto out;
1da177e4
LT		 392 }
393
27084efe
LD		 394 if (chip->vendor.irq)
395 goto out_recv;
396
9e18ee19 397 stop = jiffies + tpm_calc_ordinal_duration(chip, ordinal);
1da177e4 398 do {
90dda520
KJH		 399 u8 status = chip->vendor.status(chip);
400 if ((status & chip->vendor.req_complete_mask) ==
401 chip->vendor.req_complete_val)
1da177e4 402 goto out_recv;
d9e5b6bf 403
90dda520 404 if ((status == chip->vendor.req_canceled)) {
e659a3fe 405 dev_err(chip->dev, "Operation Canceled\n");
d9e5b6bf
KH		 406 rc = -ECANCELED;
407 goto out;
408 }
409
410 msleep(TPM_TIMEOUT); /* CHECK */
1da177e4 411 rmb();
700d8bdc 412 } while (time_before(jiffies, stop));
1da177e4 413
90dda520 414 chip->vendor.cancel(chip);
e659a3fe 415 dev_err(chip->dev, "Operation Timed out\n");
d9e5b6bf
KH		 416 rc = -ETIME;
417 goto out;
1da177e4
LT		 418
419out_recv:
90dda520 420 rc = chip->vendor.recv(chip, (u8 *) buf, bufsiz);
d9e5b6bf 421 if (rc < 0)
e659a3fe 422 dev_err(chip->dev,
d9e5b6bf
KH		 423 "tpm_transmit: tpm_recv: error %zd\n", rc);
424out:
d081d470 425 mutex_unlock(&chip->tpm_mutex);
d9e5b6bf 426 return rc;
1da177e4
LT		 427}
428
429#define TPM_DIGEST_SIZE 20
beed53a1
KJH		 430#define TPM_ERROR_SIZE 10
431#define TPM_RET_CODE_IDX 6
432#define TPM_GET_CAP_RET_SIZE_IDX 10
433#define TPM_GET_CAP_RET_UINT32_1_IDX 14
434#define TPM_GET_CAP_RET_UINT32_2_IDX 18
435#define TPM_GET_CAP_RET_UINT32_3_IDX 22
436#define TPM_GET_CAP_RET_UINT32_4_IDX 26
08e96e48
KJH		 437#define TPM_GET_CAP_PERM_DISABLE_IDX 16
438#define TPM_GET_CAP_PERM_INACTIVE_IDX 18
439#define TPM_GET_CAP_RET_BOOL_1_IDX 14
440#define TPM_GET_CAP_TEMP_INACTIVE_IDX 16
beed53a1
KJH		 441
442#define TPM_CAP_IDX 13
443#define TPM_CAP_SUBCAP_IDX 21
444
445enum tpm_capabilities {
08e96e48 446 TPM_CAP_FLAG = 4,
beed53a1
KJH		 447 TPM_CAP_PROP = 5,
448};
449
450enum tpm_sub_capabilities {
451 TPM_CAP_PROP_PCR = 0x1,
452 TPM_CAP_PROP_MANUFACTURER = 0x3,
08e96e48
KJH		 453 TPM_CAP_FLAG_PERM = 0x8,
454 TPM_CAP_FLAG_VOL = 0x9,
455 TPM_CAP_PROP_OWNER = 0x11,
456 TPM_CAP_PROP_TIS_TIMEOUT = 0x15,
457 TPM_CAP_PROP_TIS_DURATION = 0x20,
beed53a1
KJH		 458};
459
460/*
461 * This is a semi generic GetCapability command for use
462 * with the capability type TPM_CAP_PROP or TPM_CAP_FLAG
463 * and their associated sub_capabilities.
464 */
465
466static const u8 tpm_cap[] = {
1da177e4
LT		 467 0, 193, /* TPM_TAG_RQU_COMMAND */
468 0, 0, 0, 22, /* length */
469 0, 0, 0, 101, /* TPM_ORD_GetCapability */
beed53a1
KJH		 470 0, 0, 0, 0, /* TPM_CAP_<TYPE> */
471 0, 0, 0, 4, /* TPM_CAP_SUB_<TYPE> size */
472 0, 0, 1, 0 /* TPM_CAP_SUB_<TYPE> */
1da177e4
LT		 473};
474
beed53a1
KJH		 475static ssize_t transmit_cmd(struct tpm_chip *chip, u8 *data, int len,
476 char *desc)
477{
478 int err;
479
480 len = tpm_transmit(chip, data, len);
481 if (len < 0)
482 return len;
483 if (len == TPM_ERROR_SIZE) {
484 err = be32_to_cpu(*((__be32 *) (data + TPM_RET_CODE_IDX)));
485 dev_dbg(chip->dev, "A TPM error (%d) occurred %s\n", err, desc);
486 return err;
487 }
488 return 0;
489}
490
08e96e48
KJH		 491void tpm_gen_interrupt(struct tpm_chip *chip)
492{
493 u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 30)];
494 ssize_t rc;
495
496 memcpy(data, tpm_cap, sizeof(tpm_cap));
497 data[TPM_CAP_IDX] = TPM_CAP_PROP;
498 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_TIS_TIMEOUT;
499
500 rc = transmit_cmd(chip, data, sizeof(data),
501 "attempting to determine the timeouts");
502}
503EXPORT_SYMBOL_GPL(tpm_gen_interrupt);
504
505void tpm_get_timeouts(struct tpm_chip *chip)
506{
507 u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 30)];
508 ssize_t rc;
509 u32 timeout;
510
511 memcpy(data, tpm_cap, sizeof(tpm_cap));
512 data[TPM_CAP_IDX] = TPM_CAP_PROP;
513 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_TIS_TIMEOUT;
514
515 rc = transmit_cmd(chip, data, sizeof(data),
516 "attempting to determine the timeouts");
517 if (rc)
518 goto duration;
519
520 if (be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_SIZE_IDX)))
521 != 4 * sizeof(u32))
522 goto duration;
523
524 /* Don't overwrite default if value is 0 */
525 timeout =
526 be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX)));
527 if (timeout)
36b20020 528 chip->vendor.timeout_a = msecs_to_jiffies(timeout);
08e96e48
KJH		 529 timeout =
530 be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_2_IDX)));
531 if (timeout)
36b20020 532 chip->vendor.timeout_b = msecs_to_jiffies(timeout);
08e96e48
KJH		 533 timeout =
534 be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_3_IDX)));
535 if (timeout)
36b20020 536 chip->vendor.timeout_c = msecs_to_jiffies(timeout);
08e96e48
KJH		 537 timeout =
538 be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_4_IDX)));
539 if (timeout)
36b20020 540 chip->vendor.timeout_d = msecs_to_jiffies(timeout);
08e96e48
KJH		 541
542duration:
543 memcpy(data, tpm_cap, sizeof(tpm_cap));
544 data[TPM_CAP_IDX] = TPM_CAP_PROP;
545 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_TIS_DURATION;
546
547 rc = transmit_cmd(chip, data, sizeof(data),
548 "attempting to determine the durations");
549 if (rc)
550 return;
551
552 if (be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_SIZE_IDX)))
553 != 3 * sizeof(u32))
554 return;
555
556 chip->vendor.duration[TPM_SHORT] =
36b20020
KJH		 557 msecs_to_jiffies(be32_to_cpu
558 (*((__be32 *) (data +
559 TPM_GET_CAP_RET_UINT32_1_IDX))));
08e96e48 560 chip->vendor.duration[TPM_MEDIUM] =
36b20020
KJH		 561 msecs_to_jiffies(be32_to_cpu
562 (*((__be32 *) (data +
563 TPM_GET_CAP_RET_UINT32_2_IDX))));
08e96e48 564 chip->vendor.duration[TPM_LONG] =
36b20020
KJH		 565 msecs_to_jiffies(be32_to_cpu
566 (*((__be32 *) (data +
567 TPM_GET_CAP_RET_UINT32_3_IDX))));
08e96e48
KJH		 568}
569EXPORT_SYMBOL_GPL(tpm_get_timeouts);
570
571void tpm_continue_selftest(struct tpm_chip *chip)
572{
573 u8 data[] = {
574 0, 193, /* TPM_TAG_RQU_COMMAND */
575 0, 0, 0, 10, /* length */
576 0, 0, 0, 83, /* TPM_ORD_GetCapability */
577 };
578
579 tpm_transmit(chip, data, sizeof(data));
580}
581EXPORT_SYMBOL_GPL(tpm_continue_selftest);
582
583ssize_t tpm_show_enabled(struct device * dev, struct device_attribute * attr,
584 char *buf)
585{
586 u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 35)];
587 ssize_t rc;
588
589 struct tpm_chip *chip = dev_get_drvdata(dev);
590 if (chip == NULL)
591 return -ENODEV;
592
593 memcpy(data, tpm_cap, sizeof(tpm_cap));
594 data[TPM_CAP_IDX] = TPM_CAP_FLAG;
595 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_FLAG_PERM;
596
597 rc = transmit_cmd(chip, data, sizeof(data),
598 "attemtping to determine the permanent state");
599 if (rc)
600 return 0;
601 return sprintf(buf, "%d\n", !data[TPM_GET_CAP_PERM_DISABLE_IDX]);
602}
603EXPORT_SYMBOL_GPL(tpm_show_enabled);
604
605ssize_t tpm_show_active(struct device * dev, struct device_attribute * attr,
606 char *buf)
607{
608 u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 35)];
609 ssize_t rc;
610
611 struct tpm_chip *chip = dev_get_drvdata(dev);
612 if (chip == NULL)
613 return -ENODEV;
614
615 memcpy(data, tpm_cap, sizeof(tpm_cap));
616 data[TPM_CAP_IDX] = TPM_CAP_FLAG;
617 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_FLAG_PERM;
618
619 rc = transmit_cmd(chip, data, sizeof(data),
620 "attemtping to determine the permanent state");
621 if (rc)
622 return 0;
623 return sprintf(buf, "%d\n", !data[TPM_GET_CAP_PERM_INACTIVE_IDX]);
624}
625EXPORT_SYMBOL_GPL(tpm_show_active);
626
627ssize_t tpm_show_owned(struct device * dev, struct device_attribute * attr,
628 char *buf)
629{
630 u8 data[sizeof(tpm_cap)];
631 ssize_t rc;
632
633 struct tpm_chip *chip = dev_get_drvdata(dev);
634 if (chip == NULL)
635 return -ENODEV;
636
637 memcpy(data, tpm_cap, sizeof(tpm_cap));
638 data[TPM_CAP_IDX] = TPM_CAP_PROP;
639 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_OWNER;
640
641 rc = transmit_cmd(chip, data, sizeof(data),
642 "attempting to determine the owner state");
643 if (rc)
644 return 0;
645 return sprintf(buf, "%d\n", data[TPM_GET_CAP_RET_BOOL_1_IDX]);
646}
647EXPORT_SYMBOL_GPL(tpm_show_owned);
648
649ssize_t tpm_show_temp_deactivated(struct device * dev,
650 struct device_attribute * attr, char *buf)
651{
652 u8 data[sizeof(tpm_cap)];
653 ssize_t rc;
654
655 struct tpm_chip *chip = dev_get_drvdata(dev);
656 if (chip == NULL)
657 return -ENODEV;
658
659 memcpy(data, tpm_cap, sizeof(tpm_cap));
660 data[TPM_CAP_IDX] = TPM_CAP_FLAG;
661 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_FLAG_VOL;
662
663 rc = transmit_cmd(chip, data, sizeof(data),
664 "attempting to determine the temporary state");
665 if (rc)
666 return 0;
667 return sprintf(buf, "%d\n", data[TPM_GET_CAP_TEMP_INACTIVE_IDX]);
668}
669EXPORT_SYMBOL_GPL(tpm_show_temp_deactivated);
670
dff37e4b 671static const u8 pcrread[] = {
1da177e4
LT		 672 0, 193, /* TPM_TAG_RQU_COMMAND */
673 0, 0, 0, 14, /* length */
674 0, 0, 0, 21, /* TPM_ORD_PcrRead */
675 0, 0, 0, 0 /* PCR index */
676};
677
6659ca2a
KH		 678ssize_t tpm_show_pcrs(struct device *dev, struct device_attribute *attr,
679 char *buf)
1da177e4 680{
08e96e48 681 u8 data[max_t(int, max(ARRAY_SIZE(tpm_cap), ARRAY_SIZE(pcrread)), 30)];
beed53a1 682 ssize_t rc;
81179bb6
KH		 683 int i, j, num_pcrs;
684 __be32 index;
1da177e4
LT		 685 char *str = buf;
686
e659a3fe 687 struct tpm_chip *chip = dev_get_drvdata(dev);
1da177e4
LT		 688 if (chip == NULL)
689 return -ENODEV;
690
beed53a1
KJH		 691 memcpy(data, tpm_cap, sizeof(tpm_cap));
692 data[TPM_CAP_IDX] = TPM_CAP_PROP;
693 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_PCR;
694
695 rc = transmit_cmd(chip, data, sizeof(data),
696 "attempting to determine the number of PCRS");
697 if (rc)
e234bc97 698 return 0;
1da177e4 699
81179bb6 700 num_pcrs = be32_to_cpu(*((__be32 *) (data + 14)));
1da177e4
LT		 701 for (i = 0; i < num_pcrs; i++) {
702 memcpy(data, pcrread, sizeof(pcrread));
703 index = cpu_to_be32(i);
704 memcpy(data + 10, &index, 4);
beed53a1
KJH		 705 rc = transmit_cmd(chip, data, sizeof(data),
706 "attempting to read a PCR");
707 if (rc)
e234bc97 708 goto out;
1da177e4
LT		 709 str += sprintf(str, "PCR-%02d: ", i);
710 for (j = 0; j < TPM_DIGEST_SIZE; j++)
711 str += sprintf(str, "%02X ", *(data + 10 + j));
712 str += sprintf(str, "\n");
713 }
e234bc97 714out:
1da177e4
LT		 715 return str - buf;
716}
6659ca2a 717EXPORT_SYMBOL_GPL(tpm_show_pcrs);
1da177e4
LT		 718
719#define READ_PUBEK_RESULT_SIZE 314
dff37e4b 720static const u8 readpubek[] = {
1da177e4
LT		 721 0, 193, /* TPM_TAG_RQU_COMMAND */
722 0, 0, 0, 30, /* length */
723 0, 0, 0, 124, /* TPM_ORD_ReadPubek */
724};
725
6659ca2a
KH		 726ssize_t tpm_show_pubek(struct device *dev, struct device_attribute *attr,
727 char *buf)
1da177e4 728{
2df7111f 729 u8 *data;
beed53a1 730 ssize_t err;
81179bb6 731 int i, rc;
1da177e4
LT		 732 char *str = buf;
733
e659a3fe 734 struct tpm_chip *chip = dev_get_drvdata(dev);
1da177e4
LT		 735 if (chip == NULL)
736 return -ENODEV;
737
b888c87b 738 data = kzalloc(READ_PUBEK_RESULT_SIZE, GFP_KERNEL);
2df7111f
KH		 739 if (!data)
740 return -ENOMEM;
741
1da177e4 742 memcpy(data, readpubek, sizeof(readpubek));
1da177e4 743
beed53a1
KJH		 744 err = transmit_cmd(chip, data, READ_PUBEK_RESULT_SIZE,
745 "attempting to read the PUBEK");
746 if (err)
34d6e075 747 goto out;
1da177e4
LT		 748
749 /*
750 ignore header 10 bytes
751 algorithm 32 bits (1 == RSA )
752 encscheme 16 bits
753 sigscheme 16 bits
754 parameters (RSA 12->bytes: keybit, #primes, expbit)
755 keylenbytes 32 bits
756 256 byte modulus
757 ignore checksum 20 bytes
758 */
759
1da177e4
LT		 760 str +=
761 sprintf(str,
762 "Algorithm: %02X %02X %02X %02X\nEncscheme: %02X %02X\n"
763 "Sigscheme: %02X %02X\nParameters: %02X %02X %02X %02X"
764 " %02X %02X %02X %02X %02X %02X %02X %02X\n"
765 "Modulus length: %d\nModulus: \n",
766 data[10], data[11], data[12], data[13], data[14],
767 data[15], data[16], data[17], data[22], data[23],
768 data[24], data[25], data[26], data[27], data[28],
769 data[29], data[30], data[31], data[32], data[33],
1dda8abe 770 be32_to_cpu(*((__be32 *) (data + 34))));
1da177e4
LT		 771
772 for (i = 0; i < 256; i++) {
1dda8abe 773 str += sprintf(str, "%02X ", data[i + 38]);
1da177e4
LT		 774 if ((i + 1) % 16 == 0)
775 str += sprintf(str, "\n");
776 }
34d6e075 777out:
beed53a1 778 rc = str - buf;
2df7111f
KH		 779 kfree(data);
780 return rc;
1da177e4 781}
6659ca2a 782EXPORT_SYMBOL_GPL(tpm_show_pubek);
1da177e4 783
beed53a1 784#define CAP_VERSION_1_1 6
08e96e48 785#define CAP_VERSION_1_2 0x1A
beed53a1 786#define CAP_VERSION_IDX 13
dff37e4b 787static const u8 cap_version[] = {
1da177e4
LT		 788 0, 193, /* TPM_TAG_RQU_COMMAND */
789 0, 0, 0, 18, /* length */
790 0, 0, 0, 101, /* TPM_ORD_GetCapability */
beed53a1 791 0, 0, 0, 0,
1da177e4
LT		 792 0, 0, 0, 0
793};
794
6659ca2a
KH		 795ssize_t tpm_show_caps(struct device *dev, struct device_attribute *attr,
796 char *buf)
1da177e4 797{
08e96e48 798 u8 data[max_t(int, max(ARRAY_SIZE(tpm_cap), ARRAY_SIZE(cap_version)), 30)];
beed53a1 799 ssize_t rc;
1da177e4
LT		 800 char *str = buf;
801
e659a3fe 802 struct tpm_chip *chip = dev_get_drvdata(dev);
1da177e4
LT		 803 if (chip == NULL)
804 return -ENODEV;
805
beed53a1
KJH		 806 memcpy(data, tpm_cap, sizeof(tpm_cap));
807 data[TPM_CAP_IDX] = TPM_CAP_PROP;
808 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_MANUFACTURER;
1da177e4 809
beed53a1
KJH		 810 rc = transmit_cmd(chip, data, sizeof(data),
811 "attempting to determine the manufacturer");
812 if (rc)
813 return 0;
1da177e4
LT		 814
815 str += sprintf(str, "Manufacturer: 0x%x\n",
beed53a1 816 be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX))));
1da177e4
LT		 817
818 memcpy(data, cap_version, sizeof(cap_version));
beed53a1
KJH		 819 data[CAP_VERSION_IDX] = CAP_VERSION_1_1;
820 rc = transmit_cmd(chip, data, sizeof(data),
821 "attempting to determine the 1.1 version");
822 if (rc)
823 goto out;
1da177e4 824
beed53a1
KJH		 825 str += sprintf(str,
826 "TCG version: %d.%d\nFirmware version: %d.%d\n",
827 (int) data[14], (int) data[15], (int) data[16],
828 (int) data[17]);
1da177e4 829
beed53a1 830out:
1da177e4
LT		 831 return str - buf;
832}
6659ca2a
KH		 833EXPORT_SYMBOL_GPL(tpm_show_caps);
834
08e96e48
KJH		 835ssize_t tpm_show_caps_1_2(struct device * dev,
836 struct device_attribute * attr, char *buf)
837{
838 u8 data[max_t(int, max(ARRAY_SIZE(tpm_cap), ARRAY_SIZE(cap_version)), 30)];
839 ssize_t len;
840 char *str = buf;
841
842 struct tpm_chip *chip = dev_get_drvdata(dev);
843 if (chip == NULL)
844 return -ENODEV;
845
846 memcpy(data, tpm_cap, sizeof(tpm_cap));
847 data[TPM_CAP_IDX] = TPM_CAP_PROP;
848 data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_MANUFACTURER;
849
850 if ((len = tpm_transmit(chip, data, sizeof(data))) <=
851 TPM_ERROR_SIZE) {
852 dev_dbg(chip->dev, "A TPM error (%d) occurred "
853 "attempting to determine the manufacturer\n",
854 be32_to_cpu(*((__be32 *) (data + TPM_RET_CODE_IDX))));
855 return 0;
856 }
857
858 str += sprintf(str, "Manufacturer: 0x%x\n",
859 be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX))));
860
861 memcpy(data, cap_version, sizeof(cap_version));
862 data[CAP_VERSION_IDX] = CAP_VERSION_1_2;
863
864 if ((len = tpm_transmit(chip, data, sizeof(data))) <=
865 TPM_ERROR_SIZE) {
866 dev_err(chip->dev, "A TPM error (%d) occurred "
867 "attempting to determine the 1.2 version\n",
868 be32_to_cpu(*((__be32 *) (data + TPM_RET_CODE_IDX))));
869 goto out;
870 }
871 str += sprintf(str,
872 "TCG version: %d.%d\nFirmware version: %d.%d\n",
873 (int) data[16], (int) data[17], (int) data[18],
874 (int) data[19]);
875
876out:
877 return str - buf;
878}
879EXPORT_SYMBOL_GPL(tpm_show_caps_1_2);
880
6659ca2a
KH		 881ssize_t tpm_store_cancel(struct device *dev, struct device_attribute *attr,
882 const char *buf, size_t count)
883{
884 struct tpm_chip *chip = dev_get_drvdata(dev);
885 if (chip == NULL)
886 return 0;
887
90dda520 888 chip->vendor.cancel(chip);
6659ca2a
KH		 889 return count;
890}
891EXPORT_SYMBOL_GPL(tpm_store_cancel);
1da177e4 892
1da177e4
LT		 893/*
894 * Device file system interface to the TPM
895 */
896int tpm_open(struct inode *inode, struct file *file)
897{
898 int rc = 0, minor = iminor(inode);
899 struct tpm_chip *chip = NULL, *pos;
900
25368ca5 901 lock_kernel();
1da177e4
LT		 902 spin_lock(&driver_lock);
903
904 list_for_each_entry(pos, &tpm_chip_list, list) {
90dda520 905 if (pos->vendor.miscdev.minor == minor) {
1da177e4
LT		 906 chip = pos;
907 break;
908 }
909 }
910
911 if (chip == NULL) {
912 rc = -ENODEV;
913 goto err_out;
914 }
915
916 if (chip->num_opens) {
b888c87b 917 dev_dbg(chip->dev, "Another process owns this TPM\n");
1da177e4
LT		 918 rc = -EBUSY;
919 goto err_out;
920 }
921
922 chip->num_opens++;
e659a3fe 923 get_device(chip->dev);
1da177e4
LT		 924
925 spin_unlock(&driver_lock);
926
927 chip->data_buffer = kmalloc(TPM_BUFSIZE * sizeof(u8), GFP_KERNEL);
928 if (chip->data_buffer == NULL) {
929 chip->num_opens--;
e659a3fe 930 put_device(chip->dev);
25368ca5 931 unlock_kernel();
1da177e4
LT		 932 return -ENOMEM;
933 }
934
935 atomic_set(&chip->data_pending, 0);
936
937 file->private_data = chip;
25368ca5 938 unlock_kernel();
1da177e4
LT		 939 return 0;
940
941err_out:
942 spin_unlock(&driver_lock);
25368ca5 943 unlock_kernel();
1da177e4
LT		 944 return rc;
945}
1da177e4
LT		 946EXPORT_SYMBOL_GPL(tpm_open);
947
948int tpm_release(struct inode *inode, struct file *file)
949{
950 struct tpm_chip *chip = file->private_data;
1da177e4 951
8e39c933 952 flush_scheduled_work();
1da177e4 953 spin_lock(&driver_lock);
5e976d55 954 file->private_data = NULL;
fe3fd483 955 del_singleshot_timer_sync(&chip->user_read_timer);
1da177e4 956 atomic_set(&chip->data_pending, 0);
8e39c933 957 chip->num_opens--;
e659a3fe 958 put_device(chip->dev);
5e976d55
KH		 959 kfree(chip->data_buffer);
960 spin_unlock(&driver_lock);
1da177e4
LT		 961 return 0;
962}
1da177e4
LT		 963EXPORT_SYMBOL_GPL(tpm_release);
964
b888c87b 965ssize_t tpm_write(struct file *file, const char __user *buf,
3c2f606a 966 size_t size, loff_t *off)
1da177e4
LT		 967{
968 struct tpm_chip *chip = file->private_data;
969 int in_size = size, out_size;
970
971 /* cannot perform a write until the read has cleared
972 either via tpm_read or a user_read_timer timeout */
700d8bdc
NA		 973 while (atomic_read(&chip->data_pending) != 0)
974 msleep(TPM_TIMEOUT);
1da177e4 975
d081d470 976 mutex_lock(&chip->buffer_mutex);
1da177e4
LT		 977
978 if (in_size > TPM_BUFSIZE)
979 in_size = TPM_BUFSIZE;
980
981 if (copy_from_user
982 (chip->data_buffer, (void __user *) buf, in_size)) {
d081d470 983 mutex_unlock(&chip->buffer_mutex);
1da177e4
LT		 984 return -EFAULT;
985 }
986
987 /* atomic tpm command send and result receive */
988 out_size = tpm_transmit(chip, chip->data_buffer, TPM_BUFSIZE);
989
990 atomic_set(&chip->data_pending, out_size);
d081d470 991 mutex_unlock(&chip->buffer_mutex);
1da177e4
LT		 992
993 /* Set a timeout by which the reader must come claim the result */
fe3fd483 994 mod_timer(&chip->user_read_timer, jiffies + (60 * HZ));
1da177e4
LT		 995
996 return in_size;
997}
1da177e4
LT		 998EXPORT_SYMBOL_GPL(tpm_write);
999
3c2f606a
KJH		 1000ssize_t tpm_read(struct file *file, char __user *buf,
1001 size_t size, loff_t *off)
1da177e4
LT		 1002{
1003 struct tpm_chip *chip = file->private_data;
5b44bd58 1004 int ret_size;
1da177e4 1005
5b44bd58 1006 del_singleshot_timer_sync(&chip->user_read_timer);
ba396115 1007 flush_scheduled_work();
5b44bd58
KH		 1008 ret_size = atomic_read(&chip->data_pending);
1009 atomic_set(&chip->data_pending, 0);
1010 if (ret_size > 0) { /* relay data */
1011 if (size < ret_size)
1012 ret_size = size;
1da177e4 1013
d081d470 1014 mutex_lock(&chip->buffer_mutex);
f6a2382c 1015 if (copy_to_user(buf, chip->data_buffer, ret_size))
5b44bd58 1016 ret_size = -EFAULT;
d081d470 1017 mutex_unlock(&chip->buffer_mutex);
1da177e4
LT		 1018 }
1019
1020 return ret_size;
1021}
1da177e4
LT		 1022EXPORT_SYMBOL_GPL(tpm_read);
1023
e659a3fe 1024void tpm_remove_hardware(struct device *dev)
1da177e4 1025{
e659a3fe 1026 struct tpm_chip *chip = dev_get_drvdata(dev);
1da177e4
LT		 1027
1028 if (chip == NULL) {
e659a3fe 1029 dev_err(dev, "No device data found\n");
1da177e4
LT		 1030 return;
1031 }
1032
1033 spin_lock(&driver_lock);
1034
1035 list_del(&chip->list);
1036
1037 spin_unlock(&driver_lock);
1038
90dda520 1039 misc_deregister(&chip->vendor.miscdev);
1da177e4 1040
90dda520 1041 sysfs_remove_group(&dev->kobj, chip->vendor.attr_group);
55a82ab3 1042 tpm_bios_log_teardown(chip->bios_dir);
1da177e4 1043
5bd91f18
RM		 1044 /* write it this way to be explicit (chip->dev == dev) */
1045 put_device(chip->dev);
1da177e4 1046}
e659a3fe 1047EXPORT_SYMBOL_GPL(tpm_remove_hardware);
1da177e4 1048
1da177e4
LT		 1049/*
1050 * We are about to suspend. Save the TPM state
1051 * so that it can be restored.
1052 */
ce2c87d4 1053int tpm_pm_suspend(struct device *dev, pm_message_t pm_state)
1da177e4 1054{
ce2c87d4 1055 struct tpm_chip *chip = dev_get_drvdata(dev);
2490c681
DS		 1056 u8 savestate[] = {
1057 0, 193, /* TPM_TAG_RQU_COMMAND */
1058 0, 0, 0, 10, /* blob length (in bytes) */
1059 0, 0, 0, 152 /* TPM_ORD_SaveState */
1060 };
1061
1da177e4
LT		 1062 if (chip == NULL)
1063 return -ENODEV;
1064
1065 tpm_transmit(chip, savestate, sizeof(savestate));
1066 return 0;
1067}
1da177e4
LT		 1068EXPORT_SYMBOL_GPL(tpm_pm_suspend);
1069
1070/*
1071 * Resume from a power safe. The BIOS already restored
1072 * the TPM state.
1073 */
ce2c87d4 1074int tpm_pm_resume(struct device *dev)
1da177e4 1075{
ce2c87d4 1076 struct tpm_chip *chip = dev_get_drvdata(dev);
1da177e4
LT		 1077
1078 if (chip == NULL)
1079 return -ENODEV;
1080
1da177e4
LT		 1081 return 0;
1082}
1da177e4
LT		 1083EXPORT_SYMBOL_GPL(tpm_pm_resume);
1084
5bd91f18
RM		 1085/*
1086 * Once all references to platform device are down to 0,
1087 * release all allocated structures.
1088 * In case vendor provided release function,
1089 * call it too.
1090 */
1091static void tpm_dev_release(struct device *dev)
1092{
1093 struct tpm_chip *chip = dev_get_drvdata(dev);
1094
1095 if (chip->vendor.release)
1096 chip->vendor.release(dev);
1097
1098 chip->release(dev);
1099
1100 clear_bit(chip->dev_num, dev_mask);
1101 kfree(chip->vendor.miscdev.name);
1102 kfree(chip);
1103}
1104
1da177e4
LT		 1105/*
1106 * Called from tpm_<specific>.c probe function only for devices
1107 * the driver has determined it should claim. Prior to calling
1108 * this function the specific probe function has called pci_enable_device
1109 * upon errant exit from this function specific probe function should call
1110 * pci_disable_device
1111 */
e0dd03ca
KJH		 1112struct tpm_chip *tpm_register_hardware(struct device *dev, const struct tpm_vendor_specific
1113 *entry)
1da177e4 1114{
6f9beccb
KJH		 1115#define DEVNAME_SIZE 7
1116
1117 char *devname;
1da177e4 1118 struct tpm_chip *chip;
1da177e4
LT		 1119
1120 /* Driver specific per-device data */
b888c87b 1121 chip = kzalloc(sizeof(*chip), GFP_KERNEL);
8e39c933
PW		 1122 devname = kmalloc(DEVNAME_SIZE, GFP_KERNEL);
1123
1124 if (chip == NULL || devname == NULL) {
1125 kfree(chip);
1126 kfree(devname);
e0dd03ca 1127 return NULL;
8e39c933 1128 }
1da177e4 1129
d081d470
MK		 1130 mutex_init(&chip->buffer_mutex);
1131 mutex_init(&chip->tpm_mutex);
1da177e4
LT		 1132 INIT_LIST_HEAD(&chip->list);
1133
c4028958 1134 INIT_WORK(&chip->work, timeout_work);
09e12f9f 1135
40565f19
JS		 1136 setup_timer(&chip->user_read_timer, user_reader_timeout,
1137 (unsigned long)chip);
fe3fd483 1138
90dda520 1139 memcpy(&chip->vendor, entry, sizeof(struct tpm_vendor_specific));
1da177e4 1140
10685a95 1141 chip->dev_num = find_first_zero_bit(dev_mask, TPM_NUM_DEVICES);
1da177e4 1142
10685a95 1143 if (chip->dev_num >= TPM_NUM_DEVICES) {
b888c87b 1144 dev_err(dev, "No available tpm device numbers\n");
1da177e4 1145 kfree(chip);
e0dd03ca 1146 return NULL;
1da177e4 1147 } else if (chip->dev_num == 0)
90dda520 1148 chip->vendor.miscdev.minor = TPM_MINOR;
1da177e4 1149 else
90dda520 1150 chip->vendor.miscdev.minor = MISC_DYNAMIC_MINOR;
1da177e4 1151
10685a95
KJH		 1152 set_bit(chip->dev_num, dev_mask);
1153
6f9beccb 1154 scnprintf(devname, DEVNAME_SIZE, "%s%d", "tpm", chip->dev_num);
90dda520 1155 chip->vendor.miscdev.name = devname;
1da177e4 1156
94fbcded 1157 chip->vendor.miscdev.parent = dev;
e659a3fe 1158 chip->dev = get_device(dev);
5bd91f18
RM		 1159 chip->release = dev->release;
1160 dev->release = tpm_dev_release;
1161 dev_set_drvdata(dev, chip);
1da177e4 1162
90dda520 1163 if (misc_register(&chip->vendor.miscdev)) {
e659a3fe 1164 dev_err(chip->dev,
1da177e4 1165 "unable to misc_register %s, minor %d\n",
90dda520
KJH		 1166 chip->vendor.miscdev.name,
1167 chip->vendor.miscdev.minor);
5bd91f18 1168 put_device(chip->dev);
e0dd03ca 1169 return NULL;
1da177e4
LT		 1170 }
1171
5e976d55
KH		 1172 spin_lock(&driver_lock);
1173
1da177e4
LT		 1174 list_add(&chip->list, &tpm_chip_list);
1175
5e976d55
KH		 1176 spin_unlock(&driver_lock);
1177
f33d9bd5
JG		 1178 if (sysfs_create_group(&dev->kobj, chip->vendor.attr_group)) {
1179 list_del(&chip->list);
5d469ec0 1180 misc_deregister(&chip->vendor.miscdev);
5bd91f18 1181 put_device(chip->dev);
f33d9bd5
JG		 1182 return NULL;
1183 }
1da177e4 1184
55a82ab3
KJH		 1185 chip->bios_dir = tpm_bios_log_setup(devname);
1186
e0dd03ca 1187 return chip;
1da177e4 1188}
1da177e4
LT		 1189EXPORT_SYMBOL_GPL(tpm_register_hardware);
1190
1da177e4
LT		 1191MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
1192MODULE_DESCRIPTION("TPM Driver");
1193MODULE_VERSION("2.0");
1194MODULE_LICENSE("GPL");
kernel source for telekom puls (alcatel/mediatek)