1 /*
2 * STMicroelectronics TPM Linux driver for TPM ST33ZP24
3 * Copyright (C) 2009 - 2016 STMicroelectronics
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
17 */
18
19 #include <linux/module.h>
20 #include <linux/fs.h>
21 #include <linux/kernel.h>
22 #include <linux/delay.h>
23 #include <linux/wait.h>
24 #include <linux/freezer.h>
25 #include <linux/string.h>
26 #include <linux/interrupt.h>
27 #include <linux/gpio.h>
28 #include <linux/sched.h>
29 #include <linux/uaccess.h>
30 #include <linux/io.h>
31 #include <linux/slab.h>
32
33 #include "../tpm.h"
34 #include "st33zp24.h"
35
36 #define TPM_ACCESS 0x0
37 #define TPM_STS 0x18
38 #define TPM_DATA_FIFO 0x24
39 #define TPM_INTF_CAPABILITY 0x14
40 #define TPM_INT_STATUS 0x10
41 #define TPM_INT_ENABLE 0x08
42
43 #define LOCALITY0 0
44
45 enum st33zp24_access {
46 TPM_ACCESS_VALID = 0x80,
47 TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
48 TPM_ACCESS_REQUEST_PENDING = 0x04,
49 TPM_ACCESS_REQUEST_USE = 0x02,
50 };
51
52 enum st33zp24_status {
53 TPM_STS_VALID = 0x80,
54 TPM_STS_COMMAND_READY = 0x40,
55 TPM_STS_GO = 0x20,
56 TPM_STS_DATA_AVAIL = 0x10,
57 TPM_STS_DATA_EXPECT = 0x08,
58 };
59
60 enum st33zp24_int_flags {
61 TPM_GLOBAL_INT_ENABLE = 0x80,
62 TPM_INTF_CMD_READY_INT = 0x080,
63 TPM_INTF_FIFO_AVALAIBLE_INT = 0x040,
64 TPM_INTF_WAKE_UP_READY_INT = 0x020,
65 TPM_INTF_LOCALITY_CHANGE_INT = 0x004,
66 TPM_INTF_STS_VALID_INT = 0x002,
67 TPM_INTF_DATA_AVAIL_INT = 0x001,
68 };
69
70 enum tis_defaults {
71 TIS_SHORT_TIMEOUT = 750,
72 TIS_LONG_TIMEOUT = 2000,
73 };
74
75 /*
76 * clear_interruption clear the pending interrupt.
77 * @param: tpm_dev, the tpm device device.
78 * @return: the interrupt status value.
79 */
clear_interruption(struct st33zp24_dev * tpm_dev)80 static u8 clear_interruption(struct st33zp24_dev *tpm_dev)
81 {
82 u8 interrupt;
83
84 tpm_dev->ops->recv(tpm_dev->phy_id, TPM_INT_STATUS, &interrupt, 1);
85 tpm_dev->ops->send(tpm_dev->phy_id, TPM_INT_STATUS, &interrupt, 1);
86 return interrupt;
87 } /* clear_interruption() */
88
89 /*
90 * st33zp24_cancel, cancel the current command execution or
91 * set STS to COMMAND READY.
92 * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h
93 */
st33zp24_cancel(struct tpm_chip * chip)94 static void st33zp24_cancel(struct tpm_chip *chip)
95 {
96 struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
97 u8 data;
98
99 data = TPM_STS_COMMAND_READY;
100 tpm_dev->ops->send(tpm_dev->phy_id, TPM_STS, &data, 1);
101 } /* st33zp24_cancel() */
102
103 /*
104 * st33zp24_status return the TPM_STS register
105 * @param: chip, the tpm chip description
106 * @return: the TPM_STS register value.
107 */
st33zp24_status(struct tpm_chip * chip)108 static u8 st33zp24_status(struct tpm_chip *chip)
109 {
110 struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
111 u8 data;
112
113 tpm_dev->ops->recv(tpm_dev->phy_id, TPM_STS, &data, 1);
114 return data;
115 } /* st33zp24_status() */
116
117 /*
118 * check_locality if the locality is active
119 * @param: chip, the tpm chip description
120 * @return: true if LOCALITY0 is active, otherwise false
121 */
check_locality(struct tpm_chip * chip)122 static bool check_locality(struct tpm_chip *chip)
123 {
124 struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
125 u8 data;
126 u8 status;
127
128 status = tpm_dev->ops->recv(tpm_dev->phy_id, TPM_ACCESS, &data, 1);
129 if (status && (data &
130 (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) ==
131 (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID))
132 return true;
133
134 return false;
135 } /* check_locality() */
136
137 /*
138 * request_locality request the TPM locality
139 * @param: chip, the chip description
140 * @return: the active locality or negative value.
141 */
request_locality(struct tpm_chip * chip)142 static int request_locality(struct tpm_chip *chip)
143 {
144 struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
145 unsigned long stop;
146 long ret;
147 u8 data;
148
149 if (check_locality(chip))
150 return tpm_dev->locality;
151
152 data = TPM_ACCESS_REQUEST_USE;
153 ret = tpm_dev->ops->send(tpm_dev->phy_id, TPM_ACCESS, &data, 1);
154 if (ret < 0)
155 return ret;
156
157 stop = jiffies + chip->timeout_a;
158
159 /* Request locality is usually effective after the request */
160 do {
161 if (check_locality(chip))
162 return tpm_dev->locality;
163 msleep(TPM_TIMEOUT);
164 } while (time_before(jiffies, stop));
165
166 /* could not get locality */
167 return -EACCES;
168 } /* request_locality() */
169
170 /*
171 * release_locality release the active locality
172 * @param: chip, the tpm chip description.
173 */
release_locality(struct tpm_chip * chip)174 static void release_locality(struct tpm_chip *chip)
175 {
176 struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
177 u8 data;
178
179 data = TPM_ACCESS_ACTIVE_LOCALITY;
180
181 tpm_dev->ops->send(tpm_dev->phy_id, TPM_ACCESS, &data, 1);
182 }
183
184 /*
185 * get_burstcount return the burstcount value
186 * @param: chip, the chip description
187 * return: the burstcount or negative value.
188 */
get_burstcount(struct tpm_chip * chip)189 static int get_burstcount(struct tpm_chip *chip)
190 {
191 struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
192 unsigned long stop;
193 int burstcnt, status;
194 u8 temp;
195
196 stop = jiffies + chip->timeout_d;
197 do {
198 status = tpm_dev->ops->recv(tpm_dev->phy_id, TPM_STS + 1,
199 &temp, 1);
200 if (status < 0)
201 return -EBUSY;
202
203 burstcnt = temp;
204 status = tpm_dev->ops->recv(tpm_dev->phy_id, TPM_STS + 2,
205 &temp, 1);
206 if (status < 0)
207 return -EBUSY;
208
209 burstcnt |= temp << 8;
210 if (burstcnt)
211 return burstcnt;
212 msleep(TPM_TIMEOUT);
213 } while (time_before(jiffies, stop));
214 return -EBUSY;
215 } /* get_burstcount() */
216
217
218 /*
219 * wait_for_tpm_stat_cond
220 * @param: chip, chip description
221 * @param: mask, expected mask value
222 * @param: check_cancel, does the command expected to be canceled ?
223 * @param: canceled, did we received a cancel request ?
224 * @return: true if status == mask or if the command is canceled.
225 * false in other cases.
226 */
wait_for_tpm_stat_cond(struct tpm_chip * chip,u8 mask,bool check_cancel,bool * canceled)227 static bool wait_for_tpm_stat_cond(struct tpm_chip *chip, u8 mask,
228 bool check_cancel, bool *canceled)
229 {
230 u8 status = chip->ops->status(chip);
231
232 *canceled = false;
233 if ((status & mask) == mask)
234 return true;
235 if (check_cancel && chip->ops->req_canceled(chip, status)) {
236 *canceled = true;
237 return true;
238 }
239 return false;
240 }
241
242 /*
243 * wait_for_stat wait for a TPM_STS value
244 * @param: chip, the tpm chip description
245 * @param: mask, the value mask to wait
246 * @param: timeout, the timeout
247 * @param: queue, the wait queue.
248 * @param: check_cancel, does the command can be cancelled ?
249 * @return: the tpm status, 0 if success, -ETIME if timeout is reached.
250 */
wait_for_stat(struct tpm_chip * chip,u8 mask,unsigned long timeout,wait_queue_head_t * queue,bool check_cancel)251 static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
252 wait_queue_head_t *queue, bool check_cancel)
253 {
254 struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
255 unsigned long stop;
256 int ret = 0;
257 bool canceled = false;
258 bool condition;
259 u32 cur_intrs;
260 u8 status;
261
262 /* check current status */
263 status = st33zp24_status(chip);
264 if ((status & mask) == mask)
265 return 0;
266
267 stop = jiffies + timeout;
268
269 if (chip->flags & TPM_CHIP_FLAG_IRQ) {
270 cur_intrs = tpm_dev->intrs;
271 clear_interruption(tpm_dev);
272 enable_irq(tpm_dev->irq);
273
274 do {
275 if (ret == -ERESTARTSYS && freezing(current))
276 clear_thread_flag(TIF_SIGPENDING);
277
278 timeout = stop - jiffies;
279 if ((long) timeout <= 0)
280 return -1;
281
282 ret = wait_event_interruptible_timeout(*queue,
283 cur_intrs != tpm_dev->intrs,
284 timeout);
285 clear_interruption(tpm_dev);
286 condition = wait_for_tpm_stat_cond(chip, mask,
287 check_cancel, &canceled);
288 if (ret >= 0 && condition) {
289 if (canceled)
290 return -ECANCELED;
291 return 0;
292 }
293 } while (ret == -ERESTARTSYS && freezing(current));
294
295 disable_irq_nosync(tpm_dev->irq);
296
297 } else {
298 do {
299 msleep(TPM_TIMEOUT);
300 status = chip->ops->status(chip);
301 if ((status & mask) == mask)
302 return 0;
303 } while (time_before(jiffies, stop));
304 }
305
306 return -ETIME;
307 } /* wait_for_stat() */
308
309 /*
310 * recv_data receive data
311 * @param: chip, the tpm chip description
312 * @param: buf, the buffer where the data are received
313 * @param: count, the number of data to receive
314 * @return: the number of bytes read from TPM FIFO.
315 */
recv_data(struct tpm_chip * chip,u8 * buf,size_t count)316 static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
317 {
318 struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
319 int size = 0, burstcnt, len, ret;
320
321 while (size < count &&
322 wait_for_stat(chip,
323 TPM_STS_DATA_AVAIL | TPM_STS_VALID,
324 chip->timeout_c,
325 &tpm_dev->read_queue, true) == 0) {
326 burstcnt = get_burstcount(chip);
327 if (burstcnt < 0)
328 return burstcnt;
329 len = min_t(int, burstcnt, count - size);
330 ret = tpm_dev->ops->recv(tpm_dev->phy_id, TPM_DATA_FIFO,
331 buf + size, len);
332 if (ret < 0)
333 return ret;
334
335 size += len;
336 }
337 return size;
338 }
339
340 /*
341 * tpm_ioserirq_handler the serirq irq handler
342 * @param: irq, the tpm chip description
343 * @param: dev_id, the description of the chip
344 * @return: the status of the handler.
345 */
tpm_ioserirq_handler(int irq,void * dev_id)346 static irqreturn_t tpm_ioserirq_handler(int irq, void *dev_id)
347 {
348 struct tpm_chip *chip = dev_id;
349 struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
350
351 tpm_dev->intrs++;
352 wake_up_interruptible(&tpm_dev->read_queue);
353 disable_irq_nosync(tpm_dev->irq);
354
355 return IRQ_HANDLED;
356 } /* tpm_ioserirq_handler() */
357
358 /*
359 * st33zp24_send send TPM commands through the I2C bus.
360 *
361 * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h
362 * @param: buf, the buffer to send.
363 * @param: count, the number of bytes to send.
364 * @return: In case of success the number of bytes sent.
365 * In other case, a < 0 value describing the issue.
366 */
st33zp24_send(struct tpm_chip * chip,unsigned char * buf,size_t len)367 static int st33zp24_send(struct tpm_chip *chip, unsigned char *buf,
368 size_t len)
369 {
370 struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
371 u32 status, i, size, ordinal;
372 int burstcnt = 0;
373 int ret;
374 u8 data;
375
376 if (len < TPM_HEADER_SIZE)
377 return -EBUSY;
378
379 ret = request_locality(chip);
380 if (ret < 0)
381 return ret;
382
383 status = st33zp24_status(chip);
384 if ((status & TPM_STS_COMMAND_READY) == 0) {
385 st33zp24_cancel(chip);
386 if (wait_for_stat
387 (chip, TPM_STS_COMMAND_READY, chip->timeout_b,
388 &tpm_dev->read_queue, false) < 0) {
389 ret = -ETIME;
390 goto out_err;
391 }
392 }
393
394 for (i = 0; i < len - 1;) {
395 burstcnt = get_burstcount(chip);
396 if (burstcnt < 0)
397 return burstcnt;
398 size = min_t(int, len - i - 1, burstcnt);
399 ret = tpm_dev->ops->send(tpm_dev->phy_id, TPM_DATA_FIFO,
400 buf + i, size);
401 if (ret < 0)
402 goto out_err;
403
404 i += size;
405 }
406
407 status = st33zp24_status(chip);
408 if ((status & TPM_STS_DATA_EXPECT) == 0) {
409 ret = -EIO;
410 goto out_err;
411 }
412
413 ret = tpm_dev->ops->send(tpm_dev->phy_id, TPM_DATA_FIFO,
414 buf + len - 1, 1);
415 if (ret < 0)
416 goto out_err;
417
418 status = st33zp24_status(chip);
419 if ((status & TPM_STS_DATA_EXPECT) != 0) {
420 ret = -EIO;
421 goto out_err;
422 }
423
424 data = TPM_STS_GO;
425 ret = tpm_dev->ops->send(tpm_dev->phy_id, TPM_STS, &data, 1);
426 if (ret < 0)
427 goto out_err;
428
429 if (chip->flags & TPM_CHIP_FLAG_IRQ) {
430 ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
431
432 ret = wait_for_stat(chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID,
433 tpm_calc_ordinal_duration(chip, ordinal),
434 &tpm_dev->read_queue, false);
435 if (ret < 0)
436 goto out_err;
437 }
438
439 return len;
440 out_err:
441 st33zp24_cancel(chip);
442 release_locality(chip);
443 return ret;
444 }
445
446 /*
447 * st33zp24_recv received TPM response through TPM phy.
448 * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h.
449 * @param: buf, the buffer to store datas.
450 * @param: count, the number of bytes to send.
451 * @return: In case of success the number of bytes received.
452 * In other case, a < 0 value describing the issue.
453 */
st33zp24_recv(struct tpm_chip * chip,unsigned char * buf,size_t count)454 static int st33zp24_recv(struct tpm_chip *chip, unsigned char *buf,
455 size_t count)
456 {
457 int size = 0;
458 u32 expected;
459
460 if (!chip)
461 return -EBUSY;
462
463 if (count < TPM_HEADER_SIZE) {
464 size = -EIO;
465 goto out;
466 }
467
468 size = recv_data(chip, buf, TPM_HEADER_SIZE);
469 if (size < TPM_HEADER_SIZE) {
470 dev_err(&chip->dev, "Unable to read header\n");
471 goto out;
472 }
473
474 expected = be32_to_cpu(*(__be32 *)(buf + 2));
475 if (expected > count || expected < TPM_HEADER_SIZE) {
476 size = -EIO;
477 goto out;
478 }
479
480 size += recv_data(chip, &buf[TPM_HEADER_SIZE],
481 expected - TPM_HEADER_SIZE);
482 if (size < expected) {
483 dev_err(&chip->dev, "Unable to read remainder of result\n");
484 size = -ETIME;
485 }
486
487 out:
488 st33zp24_cancel(chip);
489 release_locality(chip);
490 return size;
491 }
492
493 /*
494 * st33zp24_req_canceled
495 * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h.
496 * @param: status, the TPM status.
497 * @return: Does TPM ready to compute a new command ? true.
498 */
st33zp24_req_canceled(struct tpm_chip * chip,u8 status)499 static bool st33zp24_req_canceled(struct tpm_chip *chip, u8 status)
500 {
501 return (status == TPM_STS_COMMAND_READY);
502 }
503
504 static const struct tpm_class_ops st33zp24_tpm = {
505 .flags = TPM_OPS_AUTO_STARTUP,
506 .send = st33zp24_send,
507 .recv = st33zp24_recv,
508 .cancel = st33zp24_cancel,
509 .status = st33zp24_status,
510 .req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
511 .req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
512 .req_canceled = st33zp24_req_canceled,
513 };
514
515 /*
516 * st33zp24_probe initialize the TPM device
517 * @param: client, the i2c_client drescription (TPM I2C description).
518 * @param: id, the i2c_device_id struct.
519 * @return: 0 in case of success.
520 * -1 in other case.
521 */
st33zp24_probe(void * phy_id,const struct st33zp24_phy_ops * ops,struct device * dev,int irq,int io_lpcpd)522 int st33zp24_probe(void *phy_id, const struct st33zp24_phy_ops *ops,
523 struct device *dev, int irq, int io_lpcpd)
524 {
525 int ret;
526 u8 intmask = 0;
527 struct tpm_chip *chip;
528 struct st33zp24_dev *tpm_dev;
529
530 chip = tpmm_chip_alloc(dev, &st33zp24_tpm);
531 if (IS_ERR(chip))
532 return PTR_ERR(chip);
533
534 tpm_dev = devm_kzalloc(dev, sizeof(struct st33zp24_dev),
535 GFP_KERNEL);
536 if (!tpm_dev)
537 return -ENOMEM;
538
539 tpm_dev->phy_id = phy_id;
540 tpm_dev->ops = ops;
541 dev_set_drvdata(&chip->dev, tpm_dev);
542
543 chip->timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
544 chip->timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
545 chip->timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
546 chip->timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
547
548 tpm_dev->locality = LOCALITY0;
549
550 if (irq) {
551 /* INTERRUPT Setup */
552 init_waitqueue_head(&tpm_dev->read_queue);
553 tpm_dev->intrs = 0;
554
555 if (request_locality(chip) != LOCALITY0) {
556 ret = -ENODEV;
557 goto _tpm_clean_answer;
558 }
559
560 clear_interruption(tpm_dev);
561 ret = devm_request_irq(dev, irq, tpm_ioserirq_handler,
562 IRQF_TRIGGER_HIGH, "TPM SERIRQ management",
563 chip);
564 if (ret < 0) {
565 dev_err(&chip->dev, "TPM SERIRQ signals %d not available\n",
566 irq);
567 goto _tpm_clean_answer;
568 }
569
570 intmask |= TPM_INTF_CMD_READY_INT
571 | TPM_INTF_STS_VALID_INT
572 | TPM_INTF_DATA_AVAIL_INT;
573
574 ret = tpm_dev->ops->send(tpm_dev->phy_id, TPM_INT_ENABLE,
575 &intmask, 1);
576 if (ret < 0)
577 goto _tpm_clean_answer;
578
579 intmask = TPM_GLOBAL_INT_ENABLE;
580 ret = tpm_dev->ops->send(tpm_dev->phy_id, (TPM_INT_ENABLE + 3),
581 &intmask, 1);
582 if (ret < 0)
583 goto _tpm_clean_answer;
584
585 tpm_dev->irq = irq;
586 chip->flags |= TPM_CHIP_FLAG_IRQ;
587
588 disable_irq_nosync(tpm_dev->irq);
589 }
590
591 return tpm_chip_register(chip);
592 _tpm_clean_answer:
593 dev_info(&chip->dev, "TPM initialization fail\n");
594 return ret;
595 }
596 EXPORT_SYMBOL(st33zp24_probe);
597
598 /*
599 * st33zp24_remove remove the TPM device
600 * @param: tpm_data, the tpm phy.
601 * @return: 0 in case of success.
602 */
st33zp24_remove(struct tpm_chip * chip)603 int st33zp24_remove(struct tpm_chip *chip)
604 {
605 tpm_chip_unregister(chip);
606 return 0;
607 }
608 EXPORT_SYMBOL(st33zp24_remove);
609
610 #ifdef CONFIG_PM_SLEEP
611 /*
612 * st33zp24_pm_suspend suspend the TPM device
613 * @param: tpm_data, the tpm phy.
614 * @param: mesg, the power management message.
615 * @return: 0 in case of success.
616 */
st33zp24_pm_suspend(struct device * dev)617 int st33zp24_pm_suspend(struct device *dev)
618 {
619 struct tpm_chip *chip = dev_get_drvdata(dev);
620 struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
621
622 int ret = 0;
623
624 if (gpio_is_valid(tpm_dev->io_lpcpd))
625 gpio_set_value(tpm_dev->io_lpcpd, 0);
626 else
627 ret = tpm_pm_suspend(dev);
628
629 return ret;
630 } /* st33zp24_pm_suspend() */
631 EXPORT_SYMBOL(st33zp24_pm_suspend);
632
633 /*
634 * st33zp24_pm_resume resume the TPM device
635 * @param: tpm_data, the tpm phy.
636 * @return: 0 in case of success.
637 */
st33zp24_pm_resume(struct device * dev)638 int st33zp24_pm_resume(struct device *dev)
639 {
640 struct tpm_chip *chip = dev_get_drvdata(dev);
641 struct st33zp24_dev *tpm_dev = dev_get_drvdata(&chip->dev);
642 int ret = 0;
643
644 if (gpio_is_valid(tpm_dev->io_lpcpd)) {
645 gpio_set_value(tpm_dev->io_lpcpd, 1);
646 ret = wait_for_stat(chip,
647 TPM_STS_VALID, chip->timeout_b,
648 &tpm_dev->read_queue, false);
649 } else {
650 ret = tpm_pm_resume(dev);
651 if (!ret)
652 tpm_do_selftest(chip);
653 }
654 return ret;
655 } /* st33zp24_pm_resume() */
656 EXPORT_SYMBOL(st33zp24_pm_resume);
657 #endif
658
659 MODULE_AUTHOR("TPM support (TPMsupport@list.st.com)");
660 MODULE_DESCRIPTION("ST33ZP24 TPM 1.2 driver");
661 MODULE_VERSION("1.3.0");
662 MODULE_LICENSE("GPL");
663
