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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/char/tpm
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/char/tpm')
-rw-r--r--drivers/char/tpm/Kconfig39
-rw-r--r--drivers/char/tpm/Makefile7
-rw-r--r--drivers/char/tpm/tpm.c697
-rw-r--r--drivers/char/tpm/tpm.h93
-rw-r--r--drivers/char/tpm/tpm_atmel.c216
-rw-r--r--drivers/char/tpm/tpm_nsc.c373
6 files changed, 1425 insertions, 0 deletions
diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
new file mode 100644
index 000000000000..7a969778915a
--- /dev/null
+++ b/drivers/char/tpm/Kconfig
@@ -0,0 +1,39 @@
1#
2# TPM device configuration
3#
4
5menu "TPM devices"
6
7config TCG_TPM
8 tristate "TPM Hardware Support"
9 depends on EXPERIMENTAL && PCI
10 ---help---
11 If you have a TPM security chip in your system, which
12 implements the Trusted Computing Group's specification,
13 say Yes and it will be accessible from within Linux. For
14 more information see <http://www.trustedcomputinggroup.org>.
15 An implementation of the Trusted Software Stack (TSS), the
16 userspace enablement piece of the specification, can be
17 obtained at: <http://sourceforge.net/projects/trousers>. To
18 compile this driver as a module, choose M here; the module
19 will be called tpm. If unsure, say N.
20
21config TCG_NSC
22 tristate "National Semiconductor TPM Interface"
23 depends on TCG_TPM
24 ---help---
25 If you have a TPM security chip from National Semicondutor
26 say Yes and it will be accessible from within Linux. To
27 compile this driver as a module, choose M here; the module
28 will be called tpm_nsc.
29
30config TCG_ATMEL
31 tristate "Atmel TPM Interface"
32 depends on TCG_TPM
33 ---help---
34 If you have a TPM security chip from Atmel say Yes and it
35 will be accessible from within Linux. To compile this driver
36 as a module, choose M here; the module will be called tpm_atmel.
37
38endmenu
39
diff --git a/drivers/char/tpm/Makefile b/drivers/char/tpm/Makefile
new file mode 100644
index 000000000000..736d3df266f5
--- /dev/null
+++ b/drivers/char/tpm/Makefile
@@ -0,0 +1,7 @@
1#
2# Makefile for the kernel tpm device drivers.
3#
4obj-$(CONFIG_TCG_TPM) += tpm.o
5obj-$(CONFIG_TCG_NSC) += tpm_nsc.o
6obj-$(CONFIG_TCG_ATMEL) += tpm_atmel.o
7
diff --git a/drivers/char/tpm/tpm.c b/drivers/char/tpm/tpm.c
new file mode 100644
index 000000000000..8318268169d6
--- /dev/null
+++ b/drivers/char/tpm/tpm.c
@@ -0,0 +1,697 @@
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
41static LIST_HEAD(tpm_chip_list);
42static DEFINE_SPINLOCK(driver_lock);
43static int dev_mask[32];
44
45static 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
55void tpm_time_expired(unsigned long ptr)
56{
57 int *exp = (int *) ptr;
58 *exp = 1;
59}
60
61EXPORT_SYMBOL_GPL(tpm_time_expired);
62
63/*
64 * Initialize the LPC bus and enable the TPM ports
65 */
66int 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
127EXPORT_SYMBOL_GPL(tpm_lpc_bus_init);
128
129/*
130 * Internal kernel interface to transmit TPM commands
131 */
132static 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
187out_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
198static 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
208static 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
215static 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
249static DEVICE_ATTR(pcrs, S_IRUGO, show_pcrs, NULL);
250
251#define READ_PUBEK_RESULT_SIZE 314
252static 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
258static 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
312static DEVICE_ATTR(pubek, S_IRUGO, show_pubek, NULL);
313
314#define CAP_VER_RESULT_SIZE 18
315static 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
324static 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
333static 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
367static DEVICE_ATTR(caps, S_IRUGO, show_caps, NULL);
368
369/*
370 * Device file system interface to the TPM
371 */
372int 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
415err_out:
416 spin_unlock(&driver_lock);
417 return rc;
418}
419
420EXPORT_SYMBOL_GPL(tpm_open);
421
422int 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
446EXPORT_SYMBOL_GPL(tpm_release);
447
448ssize_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
490EXPORT_SYMBOL_GPL(tpm_write);
491
492ssize_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
525EXPORT_SYMBOL_GPL(tpm_read);
526
527void __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
558EXPORT_SYMBOL_GPL(tpm_remove);
559
560static 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 */
570int tpm_pm_suspend(struct pci_dev *pci_dev, u32 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
580EXPORT_SYMBOL_GPL(tpm_pm_suspend);
581
582/*
583 * Resume from a power safe. The BIOS already restored
584 * the TPM state.
585 */
586int 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
600EXPORT_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 */
609int 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
640dev_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
679EXPORT_SYMBOL_GPL(tpm_register_hardware);
680
681static int __init init_tpm(void)
682{
683 return 0;
684}
685
686static void __exit cleanup_tpm(void)
687{
688
689}
690
691module_init(init_tpm);
692module_exit(cleanup_tpm);
693
694MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
695MODULE_DESCRIPTION("TPM Driver");
696MODULE_VERSION("2.0");
697MODULE_LICENSE("GPL");
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
new file mode 100644
index 000000000000..575cf5aed41a
--- /dev/null
+++ b/drivers/char/tpm/tpm.h
@@ -0,0 +1,93 @@
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 */
21#include <linux/module.h>
22#include <linux/version.h>
23#include <linux/pci.h>
24#include <linux/delay.h>
25#include <linux/fs.h>
26#include <linux/miscdevice.h>
27
28#define TPM_TIMEOUT msecs_to_jiffies(5)
29
30/* TPM addresses */
31#define TPM_ADDR 0x4E
32#define TPM_DATA 0x4F
33
34struct tpm_chip;
35
36struct tpm_vendor_specific {
37 u8 req_complete_mask;
38 u8 req_complete_val;
39 u16 base; /* TPM base address */
40
41 int (*recv) (struct tpm_chip *, u8 *, size_t);
42 int (*send) (struct tpm_chip *, u8 *, size_t);
43 void (*cancel) (struct tpm_chip *);
44 struct miscdevice miscdev;
45};
46
47struct tpm_chip {
48 struct pci_dev *pci_dev; /* PCI device stuff */
49
50 int dev_num; /* /dev/tpm# */
51 int num_opens; /* only one allowed */
52 int time_expired;
53
54 /* Data passed to and from the tpm via the read/write calls */
55 u8 *data_buffer;
56 atomic_t data_pending;
57 struct semaphore buffer_mutex;
58
59 struct timer_list user_read_timer; /* user needs to claim result */
60 struct semaphore tpm_mutex; /* tpm is processing */
61 struct timer_list device_timer; /* tpm is processing */
62 struct semaphore timer_manipulation_mutex;
63
64 struct tpm_vendor_specific *vendor;
65
66 struct list_head list;
67};
68
69static inline int tpm_read_index(int index)
70{
71 outb(index, TPM_ADDR);
72 return inb(TPM_DATA) & 0xFF;
73}
74
75static inline void tpm_write_index(int index, int value)
76{
77 outb(index, TPM_ADDR);
78 outb(value & 0xFF, TPM_DATA);
79}
80
81extern void tpm_time_expired(unsigned long);
82extern int tpm_lpc_bus_init(struct pci_dev *, u16);
83
84extern int tpm_register_hardware(struct pci_dev *,
85 struct tpm_vendor_specific *);
86extern int tpm_open(struct inode *, struct file *);
87extern int tpm_release(struct inode *, struct file *);
88extern ssize_t tpm_write(struct file *, const char __user *, size_t,
89 loff_t *);
90extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *);
91extern void __devexit tpm_remove(struct pci_dev *);
92extern int tpm_pm_suspend(struct pci_dev *, u32);
93extern int tpm_pm_resume(struct pci_dev *);
diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c
new file mode 100644
index 000000000000..f9333e729b62
--- /dev/null
+++ b/drivers/char/tpm/tpm_atmel.c
@@ -0,0 +1,216 @@
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 */
21
22#include "tpm.h"
23
24/* Atmel definitions */
25#define TPM_ATML_BASE 0x400
26
27/* write status bits */
28#define ATML_STATUS_ABORT 0x01
29#define ATML_STATUS_LASTBYTE 0x04
30
31/* read status bits */
32#define ATML_STATUS_BUSY 0x01
33#define ATML_STATUS_DATA_AVAIL 0x02
34#define ATML_STATUS_REWRITE 0x04
35
36
37static int tpm_atml_recv(struct tpm_chip *chip, u8 * buf, size_t count)
38{
39 u8 status, *hdr = buf;
40 u32 size;
41 int i;
42 __be32 *native_size;
43
44 /* start reading header */
45 if (count < 6)
46 return -EIO;
47
48 for (i = 0; i < 6; i++) {
49 status = inb(chip->vendor->base + 1);
50 if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
51 dev_err(&chip->pci_dev->dev,
52 "error reading header\n");
53 return -EIO;
54 }
55 *buf++ = inb(chip->vendor->base);
56 }
57
58 /* size of the data received */
59 native_size = (__force __be32 *) (hdr + 2);
60 size = be32_to_cpu(*native_size);
61
62 if (count < size) {
63 dev_err(&chip->pci_dev->dev,
64 "Recv size(%d) less than available space\n", size);
65 for (; i < size; i++) { /* clear the waiting data anyway */
66 status = inb(chip->vendor->base + 1);
67 if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
68 dev_err(&chip->pci_dev->dev,
69 "error reading data\n");
70 return -EIO;
71 }
72 }
73 return -EIO;
74 }
75
76 /* read all the data available */
77 for (; i < size; i++) {
78 status = inb(chip->vendor->base + 1);
79 if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
80 dev_err(&chip->pci_dev->dev,
81 "error reading data\n");
82 return -EIO;
83 }
84 *buf++ = inb(chip->vendor->base);
85 }
86
87 /* make sure data available is gone */
88 status = inb(chip->vendor->base + 1);
89 if (status & ATML_STATUS_DATA_AVAIL) {
90 dev_err(&chip->pci_dev->dev, "data available is stuck\n");
91 return -EIO;
92 }
93
94 return size;
95}
96
97static int tpm_atml_send(struct tpm_chip *chip, u8 * buf, size_t count)
98{
99 int i;
100
101 dev_dbg(&chip->pci_dev->dev, "tpm_atml_send: ");
102 for (i = 0; i < count; i++) {
103 dev_dbg(&chip->pci_dev->dev, "0x%x(%d) ", buf[i], buf[i]);
104 outb(buf[i], chip->vendor->base);
105 }
106
107 return count;
108}
109
110static void tpm_atml_cancel(struct tpm_chip *chip)
111{
112 outb(ATML_STATUS_ABORT, chip->vendor->base + 1);
113}
114
115static struct file_operations atmel_ops = {
116 .owner = THIS_MODULE,
117 .llseek = no_llseek,
118 .open = tpm_open,
119 .read = tpm_read,
120 .write = tpm_write,
121 .release = tpm_release,
122};
123
124static struct tpm_vendor_specific tpm_atmel = {
125 .recv = tpm_atml_recv,
126 .send = tpm_atml_send,
127 .cancel = tpm_atml_cancel,
128 .req_complete_mask = ATML_STATUS_BUSY | ATML_STATUS_DATA_AVAIL,
129 .req_complete_val = ATML_STATUS_DATA_AVAIL,
130 .base = TPM_ATML_BASE,
131 .miscdev = { .fops = &atmel_ops, },
132};
133
134static int __devinit tpm_atml_init(struct pci_dev *pci_dev,
135 const struct pci_device_id *pci_id)
136{
137 u8 version[4];
138 int rc = 0;
139
140 if (pci_enable_device(pci_dev))
141 return -EIO;
142
143 if (tpm_lpc_bus_init(pci_dev, TPM_ATML_BASE)) {
144 rc = -ENODEV;
145 goto out_err;
146 }
147
148 /* verify that it is an Atmel part */
149 if (tpm_read_index(4) != 'A' || tpm_read_index(5) != 'T'
150 || tpm_read_index(6) != 'M' || tpm_read_index(7) != 'L') {
151 rc = -ENODEV;
152 goto out_err;
153 }
154
155 /* query chip for its version number */
156 if ((version[0] = tpm_read_index(0x00)) != 0xFF) {
157 version[1] = tpm_read_index(0x01);
158 version[2] = tpm_read_index(0x02);
159 version[3] = tpm_read_index(0x03);
160 } else {
161 dev_info(&pci_dev->dev, "version query failed\n");
162 rc = -ENODEV;
163 goto out_err;
164 }
165
166 if ((rc = tpm_register_hardware(pci_dev, &tpm_atmel)) < 0)
167 goto out_err;
168
169 dev_info(&pci_dev->dev,
170 "Atmel TPM version %d.%d.%d.%d\n", version[0], version[1],
171 version[2], version[3]);
172
173 return 0;
174out_err:
175 pci_disable_device(pci_dev);
176 return rc;
177}
178
179static struct pci_device_id tpm_pci_tbl[] __devinitdata = {
180 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0)},
181 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12)},
182 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0)},
183 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12)},
184 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0)},
185 {PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_LPC)},
186 {0,}
187};
188
189MODULE_DEVICE_TABLE(pci, tpm_pci_tbl);
190
191static struct pci_driver atmel_pci_driver = {
192 .name = "tpm_atmel",
193 .id_table = tpm_pci_tbl,
194 .probe = tpm_atml_init,
195 .remove = __devexit_p(tpm_remove),
196 .suspend = tpm_pm_suspend,
197 .resume = tpm_pm_resume,
198};
199
200static int __init init_atmel(void)
201{
202 return pci_register_driver(&atmel_pci_driver);
203}
204
205static void __exit cleanup_atmel(void)
206{
207 pci_unregister_driver(&atmel_pci_driver);
208}
209
210module_init(init_atmel);
211module_exit(cleanup_atmel);
212
213MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
214MODULE_DESCRIPTION("TPM Driver");
215MODULE_VERSION("2.0");
216MODULE_LICENSE("GPL");
diff --git a/drivers/char/tpm/tpm_nsc.c b/drivers/char/tpm/tpm_nsc.c
new file mode 100644
index 000000000000..9cce833a0923
--- /dev/null
+++ b/drivers/char/tpm/tpm_nsc.c
@@ -0,0 +1,373 @@
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 */
21
22#include "tpm.h"
23
24/* National definitions */
25#define TPM_NSC_BASE 0x360
26#define TPM_NSC_IRQ 0x07
27
28#define NSC_LDN_INDEX 0x07
29#define NSC_SID_INDEX 0x20
30#define NSC_LDC_INDEX 0x30
31#define NSC_DIO_INDEX 0x60
32#define NSC_CIO_INDEX 0x62
33#define NSC_IRQ_INDEX 0x70
34#define NSC_ITS_INDEX 0x71
35
36#define NSC_STATUS 0x01
37#define NSC_COMMAND 0x01
38#define NSC_DATA 0x00
39
40/* status bits */
41#define NSC_STATUS_OBF 0x01 /* output buffer full */
42#define NSC_STATUS_IBF 0x02 /* input buffer full */
43#define NSC_STATUS_F0 0x04 /* F0 */
44#define NSC_STATUS_A2 0x08 /* A2 */
45#define NSC_STATUS_RDY 0x10 /* ready to receive command */
46#define NSC_STATUS_IBR 0x20 /* ready to receive data */
47
48/* command bits */
49#define NSC_COMMAND_NORMAL 0x01 /* normal mode */
50#define NSC_COMMAND_EOC 0x03
51#define NSC_COMMAND_CANCEL 0x22
52
53/*
54 * Wait for a certain status to appear
55 */
56static int wait_for_stat(struct tpm_chip *chip, u8 mask, u8 val, u8 * data)
57{
58 int expired = 0;
59 struct timer_list status_timer =
60 TIMER_INITIALIZER(tpm_time_expired, jiffies + 10 * HZ,
61 (unsigned long) &expired);
62
63 /* status immediately available check */
64 *data = inb(chip->vendor->base + NSC_STATUS);
65 if ((*data & mask) == val)
66 return 0;
67
68 /* wait for status */
69 add_timer(&status_timer);
70 do {
71 set_current_state(TASK_UNINTERRUPTIBLE);
72 schedule_timeout(TPM_TIMEOUT);
73 *data = inb(chip->vendor->base + 1);
74 if ((*data & mask) == val) {
75 del_singleshot_timer_sync(&status_timer);
76 return 0;
77 }
78 }
79 while (!expired);
80
81 return -EBUSY;
82}
83
84static int nsc_wait_for_ready(struct tpm_chip *chip)
85{
86 int status;
87 int expired = 0;
88 struct timer_list status_timer =
89 TIMER_INITIALIZER(tpm_time_expired, jiffies + 100,
90 (unsigned long) &expired);
91
92 /* status immediately available check */
93 status = inb(chip->vendor->base + NSC_STATUS);
94 if (status & NSC_STATUS_OBF)
95 status = inb(chip->vendor->base + NSC_DATA);
96 if (status & NSC_STATUS_RDY)
97 return 0;
98
99 /* wait for status */
100 add_timer(&status_timer);
101 do {
102 set_current_state(TASK_UNINTERRUPTIBLE);
103 schedule_timeout(TPM_TIMEOUT);
104 status = inb(chip->vendor->base + NSC_STATUS);
105 if (status & NSC_STATUS_OBF)
106 status = inb(chip->vendor->base + NSC_DATA);
107 if (status & NSC_STATUS_RDY) {
108 del_singleshot_timer_sync(&status_timer);
109 return 0;
110 }
111 }
112 while (!expired);
113
114 dev_info(&chip->pci_dev->dev, "wait for ready failed\n");
115 return -EBUSY;
116}
117
118
119static int tpm_nsc_recv(struct tpm_chip *chip, u8 * buf, size_t count)
120{
121 u8 *buffer = buf;
122 u8 data, *p;
123 u32 size;
124 __be32 *native_size;
125
126 if (count < 6)
127 return -EIO;
128
129 if (wait_for_stat(chip, NSC_STATUS_F0, NSC_STATUS_F0, &data) < 0) {
130 dev_err(&chip->pci_dev->dev, "F0 timeout\n");
131 return -EIO;
132 }
133 if ((data =
134 inb(chip->vendor->base + NSC_DATA)) != NSC_COMMAND_NORMAL) {
135 dev_err(&chip->pci_dev->dev, "not in normal mode (0x%x)\n",
136 data);
137 return -EIO;
138 }
139
140 /* read the whole packet */
141 for (p = buffer; p < &buffer[count]; p++) {
142 if (wait_for_stat
143 (chip, NSC_STATUS_OBF, NSC_STATUS_OBF, &data) < 0) {
144 dev_err(&chip->pci_dev->dev,
145 "OBF timeout (while reading data)\n");
146 return -EIO;
147 }
148 if (data & NSC_STATUS_F0)
149 break;
150 *p = inb(chip->vendor->base + NSC_DATA);
151 }
152
153 if ((data & NSC_STATUS_F0) == 0) {
154 dev_err(&chip->pci_dev->dev, "F0 not set\n");
155 return -EIO;
156 }
157 if ((data = inb(chip->vendor->base + NSC_DATA)) != NSC_COMMAND_EOC) {
158 dev_err(&chip->pci_dev->dev,
159 "expected end of command(0x%x)\n", data);
160 return -EIO;
161 }
162
163 native_size = (__force __be32 *) (buf + 2);
164 size = be32_to_cpu(*native_size);
165
166 if (count < size)
167 return -EIO;
168
169 return size;
170}
171
172static int tpm_nsc_send(struct tpm_chip *chip, u8 * buf, size_t count)
173{
174 u8 data;
175 int i;
176
177 /*
178 * If we hit the chip with back to back commands it locks up
179 * and never set IBF. Hitting it with this "hammer" seems to
180 * fix it. Not sure why this is needed, we followed the flow
181 * chart in the manual to the letter.
182 */
183 outb(NSC_COMMAND_CANCEL, chip->vendor->base + NSC_COMMAND);
184
185 if (nsc_wait_for_ready(chip) != 0)
186 return -EIO;
187
188 if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
189 dev_err(&chip->pci_dev->dev, "IBF timeout\n");
190 return -EIO;
191 }
192
193 outb(NSC_COMMAND_NORMAL, chip->vendor->base + NSC_COMMAND);
194 if (wait_for_stat(chip, NSC_STATUS_IBR, NSC_STATUS_IBR, &data) < 0) {
195 dev_err(&chip->pci_dev->dev, "IBR timeout\n");
196 return -EIO;
197 }
198
199 for (i = 0; i < count; i++) {
200 if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
201 dev_err(&chip->pci_dev->dev,
202 "IBF timeout (while writing data)\n");
203 return -EIO;
204 }
205 outb(buf[i], chip->vendor->base + NSC_DATA);
206 }
207
208 if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) {
209 dev_err(&chip->pci_dev->dev, "IBF timeout\n");
210 return -EIO;
211 }
212 outb(NSC_COMMAND_EOC, chip->vendor->base + NSC_COMMAND);
213
214 return count;
215}
216
217static void tpm_nsc_cancel(struct tpm_chip *chip)
218{
219 outb(NSC_COMMAND_CANCEL, chip->vendor->base + NSC_COMMAND);
220}
221
222static struct file_operations nsc_ops = {
223 .owner = THIS_MODULE,
224 .llseek = no_llseek,
225 .open = tpm_open,
226 .read = tpm_read,
227 .write = tpm_write,
228 .release = tpm_release,
229};
230
231static struct tpm_vendor_specific tpm_nsc = {
232 .recv = tpm_nsc_recv,
233 .send = tpm_nsc_send,
234 .cancel = tpm_nsc_cancel,
235 .req_complete_mask = NSC_STATUS_OBF,
236 .req_complete_val = NSC_STATUS_OBF,
237 .base = TPM_NSC_BASE,
238 .miscdev = { .fops = &nsc_ops, },
239
240};
241
242static int __devinit tpm_nsc_init(struct pci_dev *pci_dev,
243 const struct pci_device_id *pci_id)
244{
245 int rc = 0;
246
247 if (pci_enable_device(pci_dev))
248 return -EIO;
249
250 if (tpm_lpc_bus_init(pci_dev, TPM_NSC_BASE)) {
251 rc = -ENODEV;
252 goto out_err;
253 }
254
255 /* verify that it is a National part (SID) */
256 if (tpm_read_index(NSC_SID_INDEX) != 0xEF) {
257 rc = -ENODEV;
258 goto out_err;
259 }
260
261 dev_dbg(&pci_dev->dev, "NSC TPM detected\n");
262 dev_dbg(&pci_dev->dev,
263 "NSC LDN 0x%x, SID 0x%x, SRID 0x%x\n",
264 tpm_read_index(0x07), tpm_read_index(0x20),
265 tpm_read_index(0x27));
266 dev_dbg(&pci_dev->dev,
267 "NSC SIOCF1 0x%x SIOCF5 0x%x SIOCF6 0x%x SIOCF8 0x%x\n",
268 tpm_read_index(0x21), tpm_read_index(0x25),
269 tpm_read_index(0x26), tpm_read_index(0x28));
270 dev_dbg(&pci_dev->dev, "NSC IO Base0 0x%x\n",
271 (tpm_read_index(0x60) << 8) | tpm_read_index(0x61));
272 dev_dbg(&pci_dev->dev, "NSC IO Base1 0x%x\n",
273 (tpm_read_index(0x62) << 8) | tpm_read_index(0x63));
274 dev_dbg(&pci_dev->dev, "NSC Interrupt number and wakeup 0x%x\n",
275 tpm_read_index(0x70));
276 dev_dbg(&pci_dev->dev, "NSC IRQ type select 0x%x\n",
277 tpm_read_index(0x71));
278 dev_dbg(&pci_dev->dev,
279 "NSC DMA channel select0 0x%x, select1 0x%x\n",
280 tpm_read_index(0x74), tpm_read_index(0x75));
281 dev_dbg(&pci_dev->dev,
282 "NSC Config "
283 "0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
284 tpm_read_index(0xF0), tpm_read_index(0xF1),
285 tpm_read_index(0xF2), tpm_read_index(0xF3),
286 tpm_read_index(0xF4), tpm_read_index(0xF5),
287 tpm_read_index(0xF6), tpm_read_index(0xF7),
288 tpm_read_index(0xF8), tpm_read_index(0xF9));
289
290 dev_info(&pci_dev->dev,
291 "NSC PC21100 TPM revision %d\n",
292 tpm_read_index(0x27) & 0x1F);
293
294 if (tpm_read_index(NSC_LDC_INDEX) == 0)
295 dev_info(&pci_dev->dev, ": NSC TPM not active\n");
296
297 /* select PM channel 1 */
298 tpm_write_index(NSC_LDN_INDEX, 0x12);
299 tpm_read_index(NSC_LDN_INDEX);
300
301 /* disable the DPM module */
302 tpm_write_index(NSC_LDC_INDEX, 0);
303 tpm_read_index(NSC_LDC_INDEX);
304
305 /* set the data register base addresses */
306 tpm_write_index(NSC_DIO_INDEX, TPM_NSC_BASE >> 8);
307 tpm_write_index(NSC_DIO_INDEX + 1, TPM_NSC_BASE);
308 tpm_read_index(NSC_DIO_INDEX);
309 tpm_read_index(NSC_DIO_INDEX + 1);
310
311 /* set the command register base addresses */
312 tpm_write_index(NSC_CIO_INDEX, (TPM_NSC_BASE + 1) >> 8);
313 tpm_write_index(NSC_CIO_INDEX + 1, (TPM_NSC_BASE + 1));
314 tpm_read_index(NSC_DIO_INDEX);
315 tpm_read_index(NSC_DIO_INDEX + 1);
316
317 /* set the interrupt number to be used for the host interface */
318 tpm_write_index(NSC_IRQ_INDEX, TPM_NSC_IRQ);
319 tpm_write_index(NSC_ITS_INDEX, 0x00);
320 tpm_read_index(NSC_IRQ_INDEX);
321
322 /* enable the DPM module */
323 tpm_write_index(NSC_LDC_INDEX, 0x01);
324 tpm_read_index(NSC_LDC_INDEX);
325
326 if ((rc = tpm_register_hardware(pci_dev, &tpm_nsc)) < 0)
327 goto out_err;
328
329 return 0;
330
331out_err:
332 pci_disable_device(pci_dev);
333 return rc;
334}
335
336static struct pci_device_id tpm_pci_tbl[] __devinitdata = {
337 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0)},
338 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12)},
339 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0)},
340 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12)},
341 {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0)},
342 {PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_LPC)},
343 {0,}
344};
345
346MODULE_DEVICE_TABLE(pci, tpm_pci_tbl);
347
348static struct pci_driver nsc_pci_driver = {
349 .name = "tpm_nsc",
350 .id_table = tpm_pci_tbl,
351 .probe = tpm_nsc_init,
352 .remove = __devexit_p(tpm_remove),
353 .suspend = tpm_pm_suspend,
354 .resume = tpm_pm_resume,
355};
356
357static int __init init_nsc(void)
358{
359 return pci_register_driver(&nsc_pci_driver);
360}
361
362static void __exit cleanup_nsc(void)
363{
364 pci_unregister_driver(&nsc_pci_driver);
365}
366
367module_init(init_nsc);
368module_exit(cleanup_nsc);
369
370MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
371MODULE_DESCRIPTION("TPM Driver");
372MODULE_VERSION("2.0");
373MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-25 07:06:11 -0500