Pull esi-support into release branch
[linux-2.6] / drivers / char / tpm / tpm_tis.c
1 /*
2  * Copyright (C) 2005, 2006 IBM Corporation
3  *
4  * Authors:
5  * Leendert van Doorn <leendert@watson.ibm.com>
6  * Kylene Hall <kjhall@us.ibm.com>
7  *
8  * Device driver for TCG/TCPA TPM (trusted platform module).
9  * Specifications at www.trustedcomputinggroup.org
10  *
11  * This device driver implements the TPM interface as defined in
12  * the TCG TPM Interface Spec version 1.2, revision 1.0.
13  *
14  * This program is free software; you can redistribute it and/or
15  * modify it under the terms of the GNU General Public License as
16  * published by the Free Software Foundation, version 2 of the
17  * License.
18  */
19 #include <linux/init.h>
20 #include <linux/module.h>
21 #include <linux/moduleparam.h>
22 #include <linux/pnp.h>
23 #include <linux/interrupt.h>
24 #include <linux/wait.h>
25 #include "tpm.h"
26
27 #define TPM_HEADER_SIZE 10
28
29 enum tis_access {
30         TPM_ACCESS_VALID = 0x80,
31         TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
32         TPM_ACCESS_REQUEST_PENDING = 0x04,
33         TPM_ACCESS_REQUEST_USE = 0x02,
34 };
35
36 enum tis_status {
37         TPM_STS_VALID = 0x80,
38         TPM_STS_COMMAND_READY = 0x40,
39         TPM_STS_GO = 0x20,
40         TPM_STS_DATA_AVAIL = 0x10,
41         TPM_STS_DATA_EXPECT = 0x08,
42 };
43
44 enum tis_int_flags {
45         TPM_GLOBAL_INT_ENABLE = 0x80000000,
46         TPM_INTF_BURST_COUNT_STATIC = 0x100,
47         TPM_INTF_CMD_READY_INT = 0x080,
48         TPM_INTF_INT_EDGE_FALLING = 0x040,
49         TPM_INTF_INT_EDGE_RISING = 0x020,
50         TPM_INTF_INT_LEVEL_LOW = 0x010,
51         TPM_INTF_INT_LEVEL_HIGH = 0x008,
52         TPM_INTF_LOCALITY_CHANGE_INT = 0x004,
53         TPM_INTF_STS_VALID_INT = 0x002,
54         TPM_INTF_DATA_AVAIL_INT = 0x001,
55 };
56
57 enum tis_defaults {
58         TIS_MEM_BASE = 0xFED40000,
59         TIS_MEM_LEN = 0x5000,
60         TIS_SHORT_TIMEOUT = 750,        /* ms */
61         TIS_LONG_TIMEOUT = 2000,        /* 2 sec */
62 };
63
64 #define TPM_ACCESS(l)                   (0x0000 | ((l) << 12))
65 #define TPM_INT_ENABLE(l)               (0x0008 | ((l) << 12))
66 #define TPM_INT_VECTOR(l)               (0x000C | ((l) << 12))
67 #define TPM_INT_STATUS(l)               (0x0010 | ((l) << 12))
68 #define TPM_INTF_CAPS(l)                (0x0014 | ((l) << 12))
69 #define TPM_STS(l)                      (0x0018 | ((l) << 12))
70 #define TPM_DATA_FIFO(l)                (0x0024 | ((l) << 12))
71
72 #define TPM_DID_VID(l)                  (0x0F00 | ((l) << 12))
73 #define TPM_RID(l)                      (0x0F04 | ((l) << 12))
74
75 static LIST_HEAD(tis_chips);
76 static DEFINE_SPINLOCK(tis_lock);
77
78 static int check_locality(struct tpm_chip *chip, int l)
79 {
80         if ((ioread8(chip->vendor.iobase + TPM_ACCESS(l)) &
81              (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) ==
82             (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID))
83                 return chip->vendor.locality = l;
84
85         return -1;
86 }
87
88 static void release_locality(struct tpm_chip *chip, int l, int force)
89 {
90         if (force || (ioread8(chip->vendor.iobase + TPM_ACCESS(l)) &
91                       (TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID)) ==
92             (TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID))
93                 iowrite8(TPM_ACCESS_ACTIVE_LOCALITY,
94                          chip->vendor.iobase + TPM_ACCESS(l));
95 }
96
97 static int request_locality(struct tpm_chip *chip, int l)
98 {
99         unsigned long stop;
100         long rc;
101
102         if (check_locality(chip, l) >= 0)
103                 return l;
104
105         iowrite8(TPM_ACCESS_REQUEST_USE,
106                  chip->vendor.iobase + TPM_ACCESS(l));
107
108         if (chip->vendor.irq) {
109                 rc = wait_event_interruptible_timeout(chip->vendor.int_queue,
110                                                       (check_locality
111                                                        (chip, l) >= 0),
112                                                       chip->vendor.timeout_a);
113                 if (rc > 0)
114                         return l;
115
116         } else {
117                 /* wait for burstcount */
118                 stop = jiffies + chip->vendor.timeout_a;
119                 do {
120                         if (check_locality(chip, l) >= 0)
121                                 return l;
122                         msleep(TPM_TIMEOUT);
123                 }
124                 while (time_before(jiffies, stop));
125         }
126         return -1;
127 }
128
129 static u8 tpm_tis_status(struct tpm_chip *chip)
130 {
131         return ioread8(chip->vendor.iobase +
132                        TPM_STS(chip->vendor.locality));
133 }
134
135 static void tpm_tis_ready(struct tpm_chip *chip)
136 {
137         /* this causes the current command to be aborted */
138         iowrite8(TPM_STS_COMMAND_READY,
139                  chip->vendor.iobase + TPM_STS(chip->vendor.locality));
140 }
141
142 static int get_burstcount(struct tpm_chip *chip)
143 {
144         unsigned long stop;
145         int burstcnt;
146
147         /* wait for burstcount */
148         /* which timeout value, spec has 2 answers (c & d) */
149         stop = jiffies + chip->vendor.timeout_d;
150         do {
151                 burstcnt = ioread8(chip->vendor.iobase +
152                                    TPM_STS(chip->vendor.locality) + 1);
153                 burstcnt += ioread8(chip->vendor.iobase +
154                                     TPM_STS(chip->vendor.locality) +
155                                     2) << 8;
156                 if (burstcnt)
157                         return burstcnt;
158                 msleep(TPM_TIMEOUT);
159         } while (time_before(jiffies, stop));
160         return -EBUSY;
161 }
162
163 static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
164                          wait_queue_head_t *queue)
165 {
166         unsigned long stop;
167         long rc;
168         u8 status;
169
170         /* check current status */
171         status = tpm_tis_status(chip);
172         if ((status & mask) == mask)
173                 return 0;
174
175         if (chip->vendor.irq) {
176                 rc = wait_event_interruptible_timeout(*queue,
177                                                       ((tpm_tis_status
178                                                         (chip) & mask) ==
179                                                        mask), timeout);
180                 if (rc > 0)
181                         return 0;
182         } else {
183                 stop = jiffies + timeout;
184                 do {
185                         msleep(TPM_TIMEOUT);
186                         status = tpm_tis_status(chip);
187                         if ((status & mask) == mask)
188                                 return 0;
189                 } while (time_before(jiffies, stop));
190         }
191         return -ETIME;
192 }
193
194 static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
195 {
196         int size = 0, burstcnt;
197         while (size < count &&
198                wait_for_stat(chip,
199                              TPM_STS_DATA_AVAIL | TPM_STS_VALID,
200                              chip->vendor.timeout_c,
201                              &chip->vendor.read_queue)
202                == 0) {
203                 burstcnt = get_burstcount(chip);
204                 for (; burstcnt > 0 && size < count; burstcnt--)
205                         buf[size++] = ioread8(chip->vendor.iobase +
206                                               TPM_DATA_FIFO(chip->vendor.
207                                                             locality));
208         }
209         return size;
210 }
211
212 static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
213 {
214         int size = 0;
215         int expected, status;
216
217         if (count < TPM_HEADER_SIZE) {
218                 size = -EIO;
219                 goto out;
220         }
221
222         /* read first 10 bytes, including tag, paramsize, and result */
223         if ((size =
224              recv_data(chip, buf, TPM_HEADER_SIZE)) < TPM_HEADER_SIZE) {
225                 dev_err(chip->dev, "Unable to read header\n");
226                 goto out;
227         }
228
229         expected = be32_to_cpu(*(__be32 *) (buf + 2));
230         if (expected > count) {
231                 size = -EIO;
232                 goto out;
233         }
234
235         if ((size +=
236              recv_data(chip, &buf[TPM_HEADER_SIZE],
237                        expected - TPM_HEADER_SIZE)) < expected) {
238                 dev_err(chip->dev, "Unable to read remainder of result\n");
239                 size = -ETIME;
240                 goto out;
241         }
242
243         wait_for_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c,
244                       &chip->vendor.int_queue);
245         status = tpm_tis_status(chip);
246         if (status & TPM_STS_DATA_AVAIL) {      /* retry? */
247                 dev_err(chip->dev, "Error left over data\n");
248                 size = -EIO;
249                 goto out;
250         }
251
252 out:
253         tpm_tis_ready(chip);
254         release_locality(chip, chip->vendor.locality, 0);
255         return size;
256 }
257
258 /*
259  * If interrupts are used (signaled by an irq set in the vendor structure)
260  * tpm.c can skip polling for the data to be available as the interrupt is
261  * waited for here
262  */
263 static int tpm_tis_send(struct tpm_chip *chip, u8 *buf, size_t len)
264 {
265         int rc, status, burstcnt;
266         size_t count = 0;
267         u32 ordinal;
268
269         if (request_locality(chip, 0) < 0)
270                 return -EBUSY;
271
272         status = tpm_tis_status(chip);
273         if ((status & TPM_STS_COMMAND_READY) == 0) {
274                 tpm_tis_ready(chip);
275                 if (wait_for_stat
276                     (chip, TPM_STS_COMMAND_READY, chip->vendor.timeout_b,
277                      &chip->vendor.int_queue) < 0) {
278                         rc = -ETIME;
279                         goto out_err;
280                 }
281         }
282
283         while (count < len - 1) {
284                 burstcnt = get_burstcount(chip);
285                 for (; burstcnt > 0 && count < len - 1; burstcnt--) {
286                         iowrite8(buf[count], chip->vendor.iobase +
287                                  TPM_DATA_FIFO(chip->vendor.locality));
288                         count++;
289                 }
290
291                 wait_for_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c,
292                               &chip->vendor.int_queue);
293                 status = tpm_tis_status(chip);
294                 if ((status & TPM_STS_DATA_EXPECT) == 0) {
295                         rc = -EIO;
296                         goto out_err;
297                 }
298         }
299
300         /* write last byte */
301         iowrite8(buf[count],
302                  chip->vendor.iobase +
303                  TPM_DATA_FIFO(chip->vendor.locality));
304         wait_for_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c,
305                       &chip->vendor.int_queue);
306         status = tpm_tis_status(chip);
307         if ((status & TPM_STS_DATA_EXPECT) != 0) {
308                 rc = -EIO;
309                 goto out_err;
310         }
311
312         /* go and do it */
313         iowrite8(TPM_STS_GO,
314                  chip->vendor.iobase + TPM_STS(chip->vendor.locality));
315
316         if (chip->vendor.irq) {
317                 ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
318                 if (wait_for_stat
319                     (chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID,
320                      tpm_calc_ordinal_duration(chip, ordinal),
321                      &chip->vendor.read_queue) < 0) {
322                         rc = -ETIME;
323                         goto out_err;
324                 }
325         }
326         return len;
327 out_err:
328         tpm_tis_ready(chip);
329         release_locality(chip, chip->vendor.locality, 0);
330         return rc;
331 }
332
333 static const struct file_operations tis_ops = {
334         .owner = THIS_MODULE,
335         .llseek = no_llseek,
336         .open = tpm_open,
337         .read = tpm_read,
338         .write = tpm_write,
339         .release = tpm_release,
340 };
341
342 static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
343 static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
344 static DEVICE_ATTR(enabled, S_IRUGO, tpm_show_enabled, NULL);
345 static DEVICE_ATTR(active, S_IRUGO, tpm_show_active, NULL);
346 static DEVICE_ATTR(owned, S_IRUGO, tpm_show_owned, NULL);
347 static DEVICE_ATTR(temp_deactivated, S_IRUGO, tpm_show_temp_deactivated,
348                    NULL);
349 static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps_1_2, NULL);
350 static DEVICE_ATTR(cancel, S_IWUSR | S_IWGRP, NULL, tpm_store_cancel);
351
352 static struct attribute *tis_attrs[] = {
353         &dev_attr_pubek.attr,
354         &dev_attr_pcrs.attr,
355         &dev_attr_enabled.attr,
356         &dev_attr_active.attr,
357         &dev_attr_owned.attr,
358         &dev_attr_temp_deactivated.attr,
359         &dev_attr_caps.attr,
360         &dev_attr_cancel.attr, NULL,
361 };
362
363 static struct attribute_group tis_attr_grp = {
364         .attrs = tis_attrs
365 };
366
367 static struct tpm_vendor_specific tpm_tis = {
368         .status = tpm_tis_status,
369         .recv = tpm_tis_recv,
370         .send = tpm_tis_send,
371         .cancel = tpm_tis_ready,
372         .req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
373         .req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
374         .req_canceled = TPM_STS_COMMAND_READY,
375         .attr_group = &tis_attr_grp,
376         .miscdev = {
377                     .fops = &tis_ops,},
378 };
379
380 static irqreturn_t tis_int_probe(int irq, void *dev_id, struct pt_regs *regs)
381 {
382         struct tpm_chip *chip = (struct tpm_chip *) dev_id;
383         u32 interrupt;
384
385         interrupt = ioread32(chip->vendor.iobase +
386                              TPM_INT_STATUS(chip->vendor.locality));
387
388         if (interrupt == 0)
389                 return IRQ_NONE;
390
391         chip->vendor.irq = irq;
392
393         /* Clear interrupts handled with TPM_EOI */
394         iowrite32(interrupt,
395                   chip->vendor.iobase +
396                   TPM_INT_STATUS(chip->vendor.locality));
397         return IRQ_HANDLED;
398 }
399
400 static irqreturn_t tis_int_handler(int irq, void *dev_id, struct pt_regs *regs)
401 {
402         struct tpm_chip *chip = (struct tpm_chip *) dev_id;
403         u32 interrupt;
404         int i;
405
406         interrupt = ioread32(chip->vendor.iobase +
407                              TPM_INT_STATUS(chip->vendor.locality));
408
409         if (interrupt == 0)
410                 return IRQ_NONE;
411
412         if (interrupt & TPM_INTF_DATA_AVAIL_INT)
413                 wake_up_interruptible(&chip->vendor.read_queue);
414         if (interrupt & TPM_INTF_LOCALITY_CHANGE_INT)
415                 for (i = 0; i < 5; i++)
416                         if (check_locality(chip, i) >= 0)
417                                 break;
418         if (interrupt &
419             (TPM_INTF_LOCALITY_CHANGE_INT | TPM_INTF_STS_VALID_INT |
420              TPM_INTF_CMD_READY_INT))
421                 wake_up_interruptible(&chip->vendor.int_queue);
422
423         /* Clear interrupts handled with TPM_EOI */
424         iowrite32(interrupt,
425                   chip->vendor.iobase +
426                   TPM_INT_STATUS(chip->vendor.locality));
427         ioread32(chip->vendor.iobase + TPM_INT_STATUS(chip->vendor.locality));
428         return IRQ_HANDLED;
429 }
430
431 static int interrupts = 1;
432 module_param(interrupts, bool, 0444);
433 MODULE_PARM_DESC(interrupts, "Enable interrupts");
434
435 static int tpm_tis_init(struct device *dev, resource_size_t start,
436                         resource_size_t len)
437 {
438         u32 vendor, intfcaps, intmask;
439         int rc, i;
440         struct tpm_chip *chip;
441
442         if (!start)
443                 start = TIS_MEM_BASE;
444         if (!len)
445                 len = TIS_MEM_LEN;
446
447         if (!(chip = tpm_register_hardware(dev, &tpm_tis)))
448                 return -ENODEV;
449
450         chip->vendor.iobase = ioremap(start, len);
451         if (!chip->vendor.iobase) {
452                 rc = -EIO;
453                 goto out_err;
454         }
455
456         vendor = ioread32(chip->vendor.iobase + TPM_DID_VID(0));
457
458         /* Default timeouts */
459         chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
460         chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
461         chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
462         chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
463
464         dev_info(dev,
465                  "1.2 TPM (device-id 0x%X, rev-id %d)\n",
466                  vendor >> 16, ioread8(chip->vendor.iobase + TPM_RID(0)));
467
468         /* Figure out the capabilities */
469         intfcaps =
470             ioread32(chip->vendor.iobase +
471                      TPM_INTF_CAPS(chip->vendor.locality));
472         dev_dbg(dev, "TPM interface capabilities (0x%x):\n",
473                 intfcaps);
474         if (intfcaps & TPM_INTF_BURST_COUNT_STATIC)
475                 dev_dbg(dev, "\tBurst Count Static\n");
476         if (intfcaps & TPM_INTF_CMD_READY_INT)
477                 dev_dbg(dev, "\tCommand Ready Int Support\n");
478         if (intfcaps & TPM_INTF_INT_EDGE_FALLING)
479                 dev_dbg(dev, "\tInterrupt Edge Falling\n");
480         if (intfcaps & TPM_INTF_INT_EDGE_RISING)
481                 dev_dbg(dev, "\tInterrupt Edge Rising\n");
482         if (intfcaps & TPM_INTF_INT_LEVEL_LOW)
483                 dev_dbg(dev, "\tInterrupt Level Low\n");
484         if (intfcaps & TPM_INTF_INT_LEVEL_HIGH)
485                 dev_dbg(dev, "\tInterrupt Level High\n");
486         if (intfcaps & TPM_INTF_LOCALITY_CHANGE_INT)
487                 dev_dbg(dev, "\tLocality Change Int Support\n");
488         if (intfcaps & TPM_INTF_STS_VALID_INT)
489                 dev_dbg(dev, "\tSts Valid Int Support\n");
490         if (intfcaps & TPM_INTF_DATA_AVAIL_INT)
491                 dev_dbg(dev, "\tData Avail Int Support\n");
492
493         if (request_locality(chip, 0) != 0) {
494                 rc = -ENODEV;
495                 goto out_err;
496         }
497
498         /* INTERRUPT Setup */
499         init_waitqueue_head(&chip->vendor.read_queue);
500         init_waitqueue_head(&chip->vendor.int_queue);
501
502         intmask =
503             ioread32(chip->vendor.iobase +
504                      TPM_INT_ENABLE(chip->vendor.locality));
505
506         intmask |= TPM_INTF_CMD_READY_INT
507             | TPM_INTF_LOCALITY_CHANGE_INT | TPM_INTF_DATA_AVAIL_INT
508             | TPM_INTF_STS_VALID_INT;
509
510         iowrite32(intmask,
511                   chip->vendor.iobase +
512                   TPM_INT_ENABLE(chip->vendor.locality));
513         if (interrupts) {
514                 chip->vendor.irq =
515                     ioread8(chip->vendor.iobase +
516                             TPM_INT_VECTOR(chip->vendor.locality));
517
518                 for (i = 3; i < 16 && chip->vendor.irq == 0; i++) {
519                         iowrite8(i, chip->vendor.iobase +
520                                     TPM_INT_VECTOR(chip->vendor.locality));
521                         if (request_irq
522                             (i, tis_int_probe, IRQF_SHARED,
523                              chip->vendor.miscdev.name, chip) != 0) {
524                                 dev_info(chip->dev,
525                                          "Unable to request irq: %d for probe\n",
526                                          i);
527                                 continue;
528                         }
529
530                         /* Clear all existing */
531                         iowrite32(ioread32
532                                   (chip->vendor.iobase +
533                                    TPM_INT_STATUS(chip->vendor.locality)),
534                                   chip->vendor.iobase +
535                                   TPM_INT_STATUS(chip->vendor.locality));
536
537                         /* Turn on */
538                         iowrite32(intmask | TPM_GLOBAL_INT_ENABLE,
539                                   chip->vendor.iobase +
540                                   TPM_INT_ENABLE(chip->vendor.locality));
541
542                         /* Generate Interrupts */
543                         tpm_gen_interrupt(chip);
544
545                         /* Turn off */
546                         iowrite32(intmask,
547                                   chip->vendor.iobase +
548                                   TPM_INT_ENABLE(chip->vendor.locality));
549                         free_irq(i, chip);
550                 }
551         }
552         if (chip->vendor.irq) {
553                 iowrite8(chip->vendor.irq,
554                          chip->vendor.iobase +
555                          TPM_INT_VECTOR(chip->vendor.locality));
556                 if (request_irq
557                     (chip->vendor.irq, tis_int_handler, IRQF_SHARED,
558                      chip->vendor.miscdev.name, chip) != 0) {
559                         dev_info(chip->dev,
560                                  "Unable to request irq: %d for use\n",
561                                  chip->vendor.irq);
562                         chip->vendor.irq = 0;
563                 } else {
564                         /* Clear all existing */
565                         iowrite32(ioread32
566                                   (chip->vendor.iobase +
567                                    TPM_INT_STATUS(chip->vendor.locality)),
568                                   chip->vendor.iobase +
569                                   TPM_INT_STATUS(chip->vendor.locality));
570
571                         /* Turn on */
572                         iowrite32(intmask | TPM_GLOBAL_INT_ENABLE,
573                                   chip->vendor.iobase +
574                                   TPM_INT_ENABLE(chip->vendor.locality));
575                 }
576         }
577
578         INIT_LIST_HEAD(&chip->vendor.list);
579         spin_lock(&tis_lock);
580         list_add(&chip->vendor.list, &tis_chips);
581         spin_unlock(&tis_lock);
582
583         tpm_get_timeouts(chip);
584         tpm_continue_selftest(chip);
585
586         return 0;
587 out_err:
588         if (chip->vendor.iobase)
589                 iounmap(chip->vendor.iobase);
590         tpm_remove_hardware(chip->dev);
591         return rc;
592 }
593
594 static int __devinit tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
595                                       const struct pnp_device_id *pnp_id)
596 {
597         resource_size_t start, len;
598         start = pnp_mem_start(pnp_dev, 0);
599         len = pnp_mem_len(pnp_dev, 0);
600
601         return tpm_tis_init(&pnp_dev->dev, start, len);
602 }
603
604 static int tpm_tis_pnp_suspend(struct pnp_dev *dev, pm_message_t msg)
605 {
606         return tpm_pm_suspend(&dev->dev, msg);
607 }
608
609 static int tpm_tis_pnp_resume(struct pnp_dev *dev)
610 {
611         return tpm_pm_resume(&dev->dev);
612 }
613
614 static struct pnp_device_id tpm_pnp_tbl[] __devinitdata = {
615         {"PNP0C31", 0},         /* TPM */
616         {"ATM1200", 0},         /* Atmel */
617         {"IFX0102", 0},         /* Infineon */
618         {"BCM0101", 0},         /* Broadcom */
619         {"NSC1200", 0},         /* National */
620         /* Add new here */
621         {"", 0},                /* User Specified */
622         {"", 0}                 /* Terminator */
623 };
624
625 static struct pnp_driver tis_pnp_driver = {
626         .name = "tpm_tis",
627         .id_table = tpm_pnp_tbl,
628         .probe = tpm_tis_pnp_init,
629         .suspend = tpm_tis_pnp_suspend,
630         .resume = tpm_tis_pnp_resume,
631 };
632
633 #define TIS_HID_USR_IDX sizeof(tpm_pnp_tbl)/sizeof(struct pnp_device_id) -2
634 module_param_string(hid, tpm_pnp_tbl[TIS_HID_USR_IDX].id,
635                     sizeof(tpm_pnp_tbl[TIS_HID_USR_IDX].id), 0444);
636 MODULE_PARM_DESC(hid, "Set additional specific HID for this driver to probe");
637
638 static struct device_driver tis_drv = {
639         .name = "tpm_tis",
640         .bus = &platform_bus_type,
641         .owner = THIS_MODULE,
642         .suspend = tpm_pm_suspend,
643         .resume = tpm_pm_resume,
644 };
645
646 static struct platform_device *pdev;
647
648 static int force;
649 module_param(force, bool, 0444);
650 MODULE_PARM_DESC(force, "Force device probe rather than using ACPI entry");
651 static int __init init_tis(void)
652 {
653         int rc;
654
655         if (force) {
656                 rc = driver_register(&tis_drv);
657                 if (rc < 0)
658                         return rc;
659                 if (IS_ERR(pdev=platform_device_register_simple("tpm_tis", -1, NULL, 0)))
660                         return PTR_ERR(pdev);
661                 if((rc=tpm_tis_init(&pdev->dev, 0, 0)) != 0) {
662                         platform_device_unregister(pdev);
663                         driver_unregister(&tis_drv);
664                 }
665                 return rc;
666         }
667
668         return pnp_register_driver(&tis_pnp_driver);
669 }
670
671 static void __exit cleanup_tis(void)
672 {
673         struct tpm_vendor_specific *i, *j;
674         struct tpm_chip *chip;
675         spin_lock(&tis_lock);
676         list_for_each_entry_safe(i, j, &tis_chips, list) {
677                 chip = to_tpm_chip(i);
678                 iowrite32(~TPM_GLOBAL_INT_ENABLE &
679                           ioread32(chip->vendor.iobase +
680                                    TPM_INT_ENABLE(chip->vendor.
681                                                   locality)),
682                           chip->vendor.iobase +
683                           TPM_INT_ENABLE(chip->vendor.locality));
684                 release_locality(chip, chip->vendor.locality, 1);
685                 if (chip->vendor.irq)
686                         free_irq(chip->vendor.irq, chip);
687                 iounmap(i->iobase);
688                 list_del(&i->list);
689                 tpm_remove_hardware(chip->dev);
690         }
691         spin_unlock(&tis_lock);
692         if (force) {
693                 platform_device_unregister(pdev);
694                 driver_unregister(&tis_drv);
695         } else
696                 pnp_unregister_driver(&tis_pnp_driver);
697 }
698
699 module_init(init_tis);
700 module_exit(cleanup_tis);
701 MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
702 MODULE_DESCRIPTION("TPM Driver");
703 MODULE_VERSION("2.0");
704 MODULE_LICENSE("GPL");