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[PATCH] Fix u32 vs. pm_message_t in drivers/char
[linux-3.10.git] / drivers / char / tpm / tpm.c
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  *
10  * Maintained by: <tpmdd_devel@lists.sourceforge.net>
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
22  * calls to schedule_timeout.
23  *
24  */
25
26 #include <linux/sched.h>
27 #include <linux/poll.h>
28 #include <linux/spinlock.h>
29 #include "tpm.h"
30
31 #define TPM_MINOR                       224     /* officially assigned */
32
33 #define TPM_BUFSIZE                     2048
34
35 /* PCI configuration addresses */
36 #define PCI_GEN_PMCON_1                 0xA0
37 #define PCI_GEN1_DEC                    0xE4
38 #define PCI_LPC_EN                      0xE6
39 #define PCI_GEN2_DEC                    0xEC
40
41 static LIST_HEAD(tpm_chip_list);
42 static DEFINE_SPINLOCK(driver_lock);
43 static int dev_mask[32];
44
45 static void user_reader_timeout(unsigned long ptr)
46 {
47         struct tpm_chip *chip = (struct tpm_chip *) ptr;
48
49         down(&chip->buffer_mutex);
50         atomic_set(&chip->data_pending, 0);
51         memset(chip->data_buffer, 0, TPM_BUFSIZE);
52         up(&chip->buffer_mutex);
53 }
54
55 void tpm_time_expired(unsigned long ptr)
56 {
57         int *exp = (int *) ptr;
58         *exp = 1;
59 }
60
61 EXPORT_SYMBOL_GPL(tpm_time_expired);
62
63 /*
64  * Initialize the LPC bus and enable the TPM ports
65  */
66 int tpm_lpc_bus_init(struct pci_dev *pci_dev, u16 base)
67 {
68         u32 lpcenable, tmp;
69         int is_lpcm = 0;
70
71         switch (pci_dev->vendor) {
72         case PCI_VENDOR_ID_INTEL:
73                 switch (pci_dev->device) {
74                 case PCI_DEVICE_ID_INTEL_82801CA_12:
75                 case PCI_DEVICE_ID_INTEL_82801DB_12:
76                         is_lpcm = 1;
77                         break;
78                 }
79                 /* init ICH (enable LPC) */
80                 pci_read_config_dword(pci_dev, PCI_GEN1_DEC, &lpcenable);
81                 lpcenable |= 0x20000000;
82                 pci_write_config_dword(pci_dev, PCI_GEN1_DEC, lpcenable);
83
84                 if (is_lpcm) {
85                         pci_read_config_dword(pci_dev, PCI_GEN1_DEC,
86                                               &lpcenable);
87                         if ((lpcenable & 0x20000000) == 0) {
88                                 dev_err(&pci_dev->dev,
89                                         "cannot enable LPC\n");
90                                 return -ENODEV;
91                         }
92                 }
93
94                 /* initialize TPM registers */
95                 pci_read_config_dword(pci_dev, PCI_GEN2_DEC, &tmp);
96
97                 if (!is_lpcm)
98                         tmp = (tmp & 0xFFFF0000) | (base & 0xFFF0);
99                 else
100                         tmp =
101                             (tmp & 0xFFFF0000) | (base & 0xFFF0) |
102                             0x00000001;
103
104                 pci_write_config_dword(pci_dev, PCI_GEN2_DEC, tmp);
105
106                 if (is_lpcm) {
107                         pci_read_config_dword(pci_dev, PCI_GEN_PMCON_1,
108                                               &tmp);
109                         tmp |= 0x00000004;      /* enable CLKRUN */
110                         pci_write_config_dword(pci_dev, PCI_GEN_PMCON_1,
111                                                tmp);
112                 }
113                 tpm_write_index(0x0D, 0x55);    /* unlock 4F */
114                 tpm_write_index(0x0A, 0x00);    /* int disable */
115                 tpm_write_index(0x08, base);    /* base addr lo */
116                 tpm_write_index(0x09, (base & 0xFF00) >> 8);    /* base addr hi */
117                 tpm_write_index(0x0D, 0xAA);    /* lock 4F */
118                 break;
119         case PCI_VENDOR_ID_AMD:
120                 /* nothing yet */
121                 break;
122         }
123
124         return 0;
125 }
126
127 EXPORT_SYMBOL_GPL(tpm_lpc_bus_init);
128
129 /*
130  * Internal kernel interface to transmit TPM commands
131  */
132 static ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
133                             size_t bufsiz)
134 {
135         ssize_t len;
136         u32 count;
137         __be32 *native_size;
138
139         native_size = (__force __be32 *) (buf + 2);
140         count = be32_to_cpu(*native_size);
141
142         if (count == 0)
143                 return -ENODATA;
144         if (count > bufsiz) {
145                 dev_err(&chip->pci_dev->dev,
146                         "invalid count value %x %x \n", count, bufsiz);
147                 return -E2BIG;
148         }
149
150         down(&chip->tpm_mutex);
151
152         if ((len = chip->vendor->send(chip, (u8 *) buf, count)) < 0) {
153                 dev_err(&chip->pci_dev->dev,
154                         "tpm_transmit: tpm_send: error %d\n", len);
155                 return len;
156         }
157
158         down(&chip->timer_manipulation_mutex);
159         chip->time_expired = 0;
160         init_timer(&chip->device_timer);
161         chip->device_timer.function = tpm_time_expired;
162         chip->device_timer.expires = jiffies + 2 * 60 * HZ;
163         chip->device_timer.data = (unsigned long) &chip->time_expired;
164         add_timer(&chip->device_timer);
165         up(&chip->timer_manipulation_mutex);
166
167         do {
168                 u8 status = inb(chip->vendor->base + 1);
169                 if ((status & chip->vendor->req_complete_mask) ==
170                     chip->vendor->req_complete_val) {
171                         down(&chip->timer_manipulation_mutex);
172                         del_singleshot_timer_sync(&chip->device_timer);
173                         up(&chip->timer_manipulation_mutex);
174                         goto out_recv;
175                 }
176                 set_current_state(TASK_UNINTERRUPTIBLE);
177                 schedule_timeout(TPM_TIMEOUT);
178                 rmb();
179         } while (!chip->time_expired);
180
181
182         chip->vendor->cancel(chip);
183         dev_err(&chip->pci_dev->dev, "Time expired\n");
184         up(&chip->tpm_mutex);
185         return -EIO;
186
187 out_recv:
188         len = chip->vendor->recv(chip, (u8 *) buf, bufsiz);
189         if (len < 0)
190                 dev_err(&chip->pci_dev->dev,
191                         "tpm_transmit: tpm_recv: error %d\n", len);
192         up(&chip->tpm_mutex);
193         return len;
194 }
195
196 #define TPM_DIGEST_SIZE 20
197 #define CAP_PCR_RESULT_SIZE 18
198 static u8 cap_pcr[] = {
199         0, 193,                 /* TPM_TAG_RQU_COMMAND */
200         0, 0, 0, 22,            /* length */
201         0, 0, 0, 101,           /* TPM_ORD_GetCapability */
202         0, 0, 0, 5,
203         0, 0, 0, 4,
204         0, 0, 1, 1
205 };
206
207 #define READ_PCR_RESULT_SIZE 30
208 static u8 pcrread[] = {
209         0, 193,                 /* TPM_TAG_RQU_COMMAND */
210         0, 0, 0, 14,            /* length */
211         0, 0, 0, 21,            /* TPM_ORD_PcrRead */
212         0, 0, 0, 0              /* PCR index */
213 };
214
215 static ssize_t show_pcrs(struct device *dev, char *buf)
216 {
217         u8 data[READ_PCR_RESULT_SIZE];
218         ssize_t len;
219         int i, j, index, num_pcrs;
220         char *str = buf;
221
222         struct tpm_chip *chip =
223             pci_get_drvdata(container_of(dev, struct pci_dev, dev));
224         if (chip == NULL)
225                 return -ENODEV;
226
227         memcpy(data, cap_pcr, sizeof(cap_pcr));
228         if ((len = tpm_transmit(chip, data, sizeof(data)))
229             < CAP_PCR_RESULT_SIZE)
230                 return len;
231
232         num_pcrs = be32_to_cpu(*((__force __be32 *) (data + 14)));
233
234         for (i = 0; i < num_pcrs; i++) {
235                 memcpy(data, pcrread, sizeof(pcrread));
236                 index = cpu_to_be32(i);
237                 memcpy(data + 10, &index, 4);
238                 if ((len = tpm_transmit(chip, data, sizeof(data)))
239                     < READ_PCR_RESULT_SIZE)
240                         return len;
241                 str += sprintf(str, "PCR-%02d: ", i);
242                 for (j = 0; j < TPM_DIGEST_SIZE; j++)
243                         str += sprintf(str, "%02X ", *(data + 10 + j));
244                 str += sprintf(str, "\n");
245         }
246         return str - buf;
247 }
248
249 static DEVICE_ATTR(pcrs, S_IRUGO, show_pcrs, NULL);
250
251 #define  READ_PUBEK_RESULT_SIZE 314
252 static u8 readpubek[] = {
253         0, 193,                 /* TPM_TAG_RQU_COMMAND */
254         0, 0, 0, 30,            /* length */
255         0, 0, 0, 124,           /* TPM_ORD_ReadPubek */
256 };
257
258 static ssize_t show_pubek(struct device *dev, char *buf)
259 {
260         u8 data[READ_PUBEK_RESULT_SIZE];
261         ssize_t len;
262         __be32 *native_val;
263         int i;
264         char *str = buf;
265
266         struct tpm_chip *chip =
267             pci_get_drvdata(container_of(dev, struct pci_dev, dev));
268         if (chip == NULL)
269                 return -ENODEV;
270
271         memcpy(data, readpubek, sizeof(readpubek));
272         memset(data + sizeof(readpubek), 0, 20);        /* zero nonce */
273
274         if ((len = tpm_transmit(chip, data, sizeof(data))) <
275             READ_PUBEK_RESULT_SIZE)
276                 return len;
277
278         /* 
279            ignore header 10 bytes
280            algorithm 32 bits (1 == RSA )
281            encscheme 16 bits
282            sigscheme 16 bits
283            parameters (RSA 12->bytes: keybit, #primes, expbit)  
284            keylenbytes 32 bits
285            256 byte modulus
286            ignore checksum 20 bytes
287          */
288
289         native_val = (__force __be32 *) (data + 34);
290
291         str +=
292             sprintf(str,
293                     "Algorithm: %02X %02X %02X %02X\nEncscheme: %02X %02X\n"
294                     "Sigscheme: %02X %02X\nParameters: %02X %02X %02X %02X"
295                     " %02X %02X %02X %02X %02X %02X %02X %02X\n"
296                     "Modulus length: %d\nModulus: \n",
297                     data[10], data[11], data[12], data[13], data[14],
298                     data[15], data[16], data[17], data[22], data[23],
299                     data[24], data[25], data[26], data[27], data[28],
300                     data[29], data[30], data[31], data[32], data[33],
301                     be32_to_cpu(*native_val)
302             );
303
304         for (i = 0; i < 256; i++) {
305                 str += sprintf(str, "%02X ", data[i + 39]);
306                 if ((i + 1) % 16 == 0)
307                         str += sprintf(str, "\n");
308         }
309         return str - buf;
310 }
311
312 static DEVICE_ATTR(pubek, S_IRUGO, show_pubek, NULL);
313
314 #define CAP_VER_RESULT_SIZE 18
315 static u8 cap_version[] = {
316         0, 193,                 /* TPM_TAG_RQU_COMMAND */
317         0, 0, 0, 18,            /* length */
318         0, 0, 0, 101,           /* TPM_ORD_GetCapability */
319         0, 0, 0, 6,
320         0, 0, 0, 0
321 };
322
323 #define CAP_MANUFACTURER_RESULT_SIZE 18
324 static u8 cap_manufacturer[] = {
325         0, 193,                 /* TPM_TAG_RQU_COMMAND */
326         0, 0, 0, 22,            /* length */
327         0, 0, 0, 101,           /* TPM_ORD_GetCapability */
328         0, 0, 0, 5,
329         0, 0, 0, 4,
330         0, 0, 1, 3
331 };
332
333 static ssize_t show_caps(struct device *dev, char *buf)
334 {
335         u8 data[READ_PUBEK_RESULT_SIZE];
336         ssize_t len;
337         char *str = buf;
338
339         struct tpm_chip *chip =
340             pci_get_drvdata(container_of(dev, struct pci_dev, dev));
341         if (chip == NULL)
342                 return -ENODEV;
343
344         memcpy(data, cap_manufacturer, sizeof(cap_manufacturer));
345
346         if ((len = tpm_transmit(chip, data, sizeof(data))) <
347             CAP_MANUFACTURER_RESULT_SIZE)
348                 return len;
349
350         str += sprintf(str, "Manufacturer: 0x%x\n",
351                        be32_to_cpu(*(data + 14)));
352
353         memcpy(data, cap_version, sizeof(cap_version));
354
355         if ((len = tpm_transmit(chip, data, sizeof(data))) <
356             CAP_VER_RESULT_SIZE)
357                 return len;
358
359         str +=
360             sprintf(str, "TCG version: %d.%d\nFirmware version: %d.%d\n",
361                     (int) data[14], (int) data[15], (int) data[16],
362                     (int) data[17]);
363
364         return str - buf;
365 }
366
367 static DEVICE_ATTR(caps, S_IRUGO, show_caps, NULL);
368
369 /*
370  * Device file system interface to the TPM
371  */
372 int tpm_open(struct inode *inode, struct file *file)
373 {
374         int rc = 0, minor = iminor(inode);
375         struct tpm_chip *chip = NULL, *pos;
376
377         spin_lock(&driver_lock);
378
379         list_for_each_entry(pos, &tpm_chip_list, list) {
380                 if (pos->vendor->miscdev.minor == minor) {
381                         chip = pos;
382                         break;
383                 }
384         }
385
386         if (chip == NULL) {
387                 rc = -ENODEV;
388                 goto err_out;
389         }
390
391         if (chip->num_opens) {
392                 dev_dbg(&chip->pci_dev->dev,
393                         "Another process owns this TPM\n");
394                 rc = -EBUSY;
395                 goto err_out;
396         }
397
398         chip->num_opens++;
399         pci_dev_get(chip->pci_dev);
400
401         spin_unlock(&driver_lock);
402
403         chip->data_buffer = kmalloc(TPM_BUFSIZE * sizeof(u8), GFP_KERNEL);
404         if (chip->data_buffer == NULL) {
405                 chip->num_opens--;
406                 pci_dev_put(chip->pci_dev);
407                 return -ENOMEM;
408         }
409
410         atomic_set(&chip->data_pending, 0);
411
412         file->private_data = chip;
413         return 0;
414
415 err_out:
416         spin_unlock(&driver_lock);
417         return rc;
418 }
419
420 EXPORT_SYMBOL_GPL(tpm_open);
421
422 int tpm_release(struct inode *inode, struct file *file)
423 {
424         struct tpm_chip *chip = file->private_data;
425         
426         file->private_data = NULL;
427
428         spin_lock(&driver_lock);
429         chip->num_opens--;
430         spin_unlock(&driver_lock);
431
432         down(&chip->timer_manipulation_mutex);
433         if (timer_pending(&chip->user_read_timer))
434                 del_singleshot_timer_sync(&chip->user_read_timer);
435         else if (timer_pending(&chip->device_timer))
436                 del_singleshot_timer_sync(&chip->device_timer);
437         up(&chip->timer_manipulation_mutex);
438
439         kfree(chip->data_buffer);
440         atomic_set(&chip->data_pending, 0);
441
442         pci_dev_put(chip->pci_dev);
443         return 0;
444 }
445
446 EXPORT_SYMBOL_GPL(tpm_release);
447
448 ssize_t tpm_write(struct file * file, const char __user * buf,
449                   size_t size, loff_t * off)
450 {
451         struct tpm_chip *chip = file->private_data;
452         int in_size = size, out_size;
453
454         /* cannot perform a write until the read has cleared
455            either via tpm_read or a user_read_timer timeout */
456         while (atomic_read(&chip->data_pending) != 0) {
457                 set_current_state(TASK_UNINTERRUPTIBLE);
458                 schedule_timeout(TPM_TIMEOUT);
459         }
460
461         down(&chip->buffer_mutex);
462
463         if (in_size > TPM_BUFSIZE)
464                 in_size = TPM_BUFSIZE;
465
466         if (copy_from_user
467             (chip->data_buffer, (void __user *) buf, in_size)) {
468                 up(&chip->buffer_mutex);
469                 return -EFAULT;
470         }
471
472         /* atomic tpm command send and result receive */
473         out_size = tpm_transmit(chip, chip->data_buffer, TPM_BUFSIZE);
474
475         atomic_set(&chip->data_pending, out_size);
476         up(&chip->buffer_mutex);
477
478         /* Set a timeout by which the reader must come claim the result */
479         down(&chip->timer_manipulation_mutex);
480         init_timer(&chip->user_read_timer);
481         chip->user_read_timer.function = user_reader_timeout;
482         chip->user_read_timer.data = (unsigned long) chip;
483         chip->user_read_timer.expires = jiffies + (60 * HZ);
484         add_timer(&chip->user_read_timer);
485         up(&chip->timer_manipulation_mutex);
486
487         return in_size;
488 }
489
490 EXPORT_SYMBOL_GPL(tpm_write);
491
492 ssize_t tpm_read(struct file * file, char __user * buf,
493                  size_t size, loff_t * off)
494 {
495         struct tpm_chip *chip = file->private_data;
496         int ret_size = -ENODATA;
497
498         if (atomic_read(&chip->data_pending) != 0) {    /* Result available */
499                 down(&chip->timer_manipulation_mutex);
500                 del_singleshot_timer_sync(&chip->user_read_timer);
501                 up(&chip->timer_manipulation_mutex);
502
503                 down(&chip->buffer_mutex);
504
505                 ret_size = atomic_read(&chip->data_pending);
506                 atomic_set(&chip->data_pending, 0);
507
508                 if (ret_size == 0)      /* timeout just occurred */
509                         ret_size = -ETIME;
510                 else if (ret_size > 0) {        /* relay data */
511                         if (size < ret_size)
512                                 ret_size = size;
513
514                         if (copy_to_user((void __user *) buf,
515                                          chip->data_buffer, ret_size)) {
516                                 ret_size = -EFAULT;
517                         }
518                 }
519                 up(&chip->buffer_mutex);
520         }
521
522         return ret_size;
523 }
524
525 EXPORT_SYMBOL_GPL(tpm_read);
526
527 void __devexit tpm_remove(struct pci_dev *pci_dev)
528 {
529         struct tpm_chip *chip = pci_get_drvdata(pci_dev);
530
531         if (chip == NULL) {
532                 dev_err(&pci_dev->dev, "No device data found\n");
533                 return;
534         }
535
536         spin_lock(&driver_lock);
537
538         list_del(&chip->list);
539
540         spin_unlock(&driver_lock);
541
542         pci_set_drvdata(pci_dev, NULL);
543         misc_deregister(&chip->vendor->miscdev);
544
545         device_remove_file(&pci_dev->dev, &dev_attr_pubek);
546         device_remove_file(&pci_dev->dev, &dev_attr_pcrs);
547         device_remove_file(&pci_dev->dev, &dev_attr_caps);
548
549         pci_disable_device(pci_dev);
550
551         dev_mask[chip->dev_num / 32] &= !(1 << (chip->dev_num % 32));
552
553         kfree(chip);
554
555         pci_dev_put(pci_dev);
556 }
557
558 EXPORT_SYMBOL_GPL(tpm_remove);
559
560 static u8 savestate[] = {
561         0, 193,                 /* TPM_TAG_RQU_COMMAND */
562         0, 0, 0, 10,            /* blob length (in bytes) */
563         0, 0, 0, 152            /* TPM_ORD_SaveState */
564 };
565
566 /*
567  * We are about to suspend. Save the TPM state
568  * so that it can be restored.
569  */
570 int tpm_pm_suspend(struct pci_dev *pci_dev, pm_message_t pm_state)
571 {
572         struct tpm_chip *chip = pci_get_drvdata(pci_dev);
573         if (chip == NULL)
574                 return -ENODEV;
575
576         tpm_transmit(chip, savestate, sizeof(savestate));
577         return 0;
578 }
579
580 EXPORT_SYMBOL_GPL(tpm_pm_suspend);
581
582 /*
583  * Resume from a power safe. The BIOS already restored
584  * the TPM state.
585  */
586 int tpm_pm_resume(struct pci_dev *pci_dev)
587 {
588         struct tpm_chip *chip = pci_get_drvdata(pci_dev);
589
590         if (chip == NULL)
591                 return -ENODEV;
592
593         spin_lock(&driver_lock);
594         tpm_lpc_bus_init(pci_dev, chip->vendor->base);
595         spin_unlock(&driver_lock);
596
597         return 0;
598 }
599
600 EXPORT_SYMBOL_GPL(tpm_pm_resume);
601
602 /*
603  * Called from tpm_<specific>.c probe function only for devices 
604  * the driver has determined it should claim.  Prior to calling
605  * this function the specific probe function has called pci_enable_device
606  * upon errant exit from this function specific probe function should call
607  * pci_disable_device
608  */
609 int tpm_register_hardware(struct pci_dev *pci_dev,
610                           struct tpm_vendor_specific *entry)
611 {
612         char devname[7];
613         struct tpm_chip *chip;
614         int i, j;
615
616         /* Driver specific per-device data */
617         chip = kmalloc(sizeof(*chip), GFP_KERNEL);
618         if (chip == NULL)
619                 return -ENOMEM;
620
621         memset(chip, 0, sizeof(struct tpm_chip));
622
623         init_MUTEX(&chip->buffer_mutex);
624         init_MUTEX(&chip->tpm_mutex);
625         init_MUTEX(&chip->timer_manipulation_mutex);
626         INIT_LIST_HEAD(&chip->list);
627
628         chip->vendor = entry;
629
630         chip->dev_num = -1;
631
632         for (i = 0; i < 32; i++)
633                 for (j = 0; j < 8; j++)
634                         if ((dev_mask[i] & (1 << j)) == 0) {
635                                 chip->dev_num = i * 32 + j;
636                                 dev_mask[i] |= 1 << j;
637                                 goto dev_num_search_complete;
638                         }
639
640 dev_num_search_complete:
641         if (chip->dev_num < 0) {
642                 dev_err(&pci_dev->dev,
643                         "No available tpm device numbers\n");
644                 kfree(chip);
645                 return -ENODEV;
646         } else if (chip->dev_num == 0)
647                 chip->vendor->miscdev.minor = TPM_MINOR;
648         else
649                 chip->vendor->miscdev.minor = MISC_DYNAMIC_MINOR;
650
651         snprintf(devname, sizeof(devname), "%s%d", "tpm", chip->dev_num);
652         chip->vendor->miscdev.name = devname;
653
654         chip->vendor->miscdev.dev = &(pci_dev->dev);
655         chip->pci_dev = pci_dev_get(pci_dev);
656
657         if (misc_register(&chip->vendor->miscdev)) {
658                 dev_err(&chip->pci_dev->dev,
659                         "unable to misc_register %s, minor %d\n",
660                         chip->vendor->miscdev.name,
661                         chip->vendor->miscdev.minor);
662                 pci_dev_put(pci_dev);
663                 kfree(chip);
664                 dev_mask[i] &= !(1 << j);
665                 return -ENODEV;
666         }
667
668         pci_set_drvdata(pci_dev, chip);
669
670         list_add(&chip->list, &tpm_chip_list);
671
672         device_create_file(&pci_dev->dev, &dev_attr_pubek);
673         device_create_file(&pci_dev->dev, &dev_attr_pcrs);
674         device_create_file(&pci_dev->dev, &dev_attr_caps);
675
676         return 0;
677 }
678
679 EXPORT_SYMBOL_GPL(tpm_register_hardware);
680
681 static int __init init_tpm(void)
682 {
683         return 0;
684 }
685
686 static void __exit cleanup_tpm(void)
687 {
688
689 }
690
691 module_init(init_tpm);
692 module_exit(cleanup_tpm);
693
694 MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
695 MODULE_DESCRIPTION("TPM Driver");
696 MODULE_VERSION("2.0");
697 MODULE_LICENSE("GPL");