2 * Copyright (C) 2005, 2006 IBM Corporation
5 * Leendert van Doorn <leendert@watson.ibm.com>
6 * Kylene Hall <kjhall@us.ibm.com>
8 * Maintained by: <tpmdd-devel@lists.sourceforge.net>
10 * Device driver for TCG/TCPA TPM (trusted platform module).
11 * Specifications at www.trustedcomputinggroup.org
13 * This device driver implements the TPM interface as defined in
14 * the TCG TPM Interface Spec version 1.2, revision 1.0.
16 * This program is free software; you can redistribute it and/or
17 * modify it under the terms of the GNU General Public License as
18 * published by the Free Software Foundation, version 2 of the
21 #include <linux/init.h>
22 #include <linux/module.h>
23 #include <linux/moduleparam.h>
24 #include <linux/pnp.h>
25 #include <linux/slab.h>
26 #include <linux/interrupt.h>
27 #include <linux/wait.h>
28 #include <linux/acpi.h>
29 #include <linux/freezer.h>
33 TPM_ACCESS_VALID = 0x80,
34 TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
35 TPM_ACCESS_REQUEST_PENDING = 0x04,
36 TPM_ACCESS_REQUEST_USE = 0x02,
41 TPM_STS_COMMAND_READY = 0x40,
43 TPM_STS_DATA_AVAIL = 0x10,
44 TPM_STS_DATA_EXPECT = 0x08,
48 TPM_GLOBAL_INT_ENABLE = 0x80000000,
49 TPM_INTF_BURST_COUNT_STATIC = 0x100,
50 TPM_INTF_CMD_READY_INT = 0x080,
51 TPM_INTF_INT_EDGE_FALLING = 0x040,
52 TPM_INTF_INT_EDGE_RISING = 0x020,
53 TPM_INTF_INT_LEVEL_LOW = 0x010,
54 TPM_INTF_INT_LEVEL_HIGH = 0x008,
55 TPM_INTF_LOCALITY_CHANGE_INT = 0x004,
56 TPM_INTF_STS_VALID_INT = 0x002,
57 TPM_INTF_DATA_AVAIL_INT = 0x001,
61 TIS_MEM_BASE = 0xFED40000,
63 TIS_SHORT_TIMEOUT = 750, /* ms */
64 TIS_LONG_TIMEOUT = 2000, /* 2 sec */
67 #define TPM_ACCESS(l) (0x0000 | ((l) << 12))
68 #define TPM_INT_ENABLE(l) (0x0008 | ((l) << 12))
69 #define TPM_INT_VECTOR(l) (0x000C | ((l) << 12))
70 #define TPM_INT_STATUS(l) (0x0010 | ((l) << 12))
71 #define TPM_INTF_CAPS(l) (0x0014 | ((l) << 12))
72 #define TPM_STS(l) (0x0018 | ((l) << 12))
73 #define TPM_DATA_FIFO(l) (0x0024 | ((l) << 12))
75 #define TPM_DID_VID(l) (0x0F00 | ((l) << 12))
76 #define TPM_RID(l) (0x0F04 | ((l) << 12))
78 static LIST_HEAD(tis_chips);
79 static DEFINE_MUTEX(tis_lock);
81 #if defined(CONFIG_PNP) && defined(CONFIG_ACPI)
82 static int is_itpm(struct pnp_dev *dev)
84 struct acpi_device *acpi = pnp_acpi_device(dev);
85 struct acpi_hardware_id *id;
87 list_for_each_entry(id, &acpi->pnp.ids, list) {
88 if (!strcmp("INTC0102", id->id))
95 static inline int is_itpm(struct pnp_dev *dev)
101 static int check_locality(struct tpm_chip *chip, int l)
103 if ((ioread8(chip->vendor.iobase + TPM_ACCESS(l)) &
104 (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) ==
105 (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID))
106 return chip->vendor.locality = l;
111 static void release_locality(struct tpm_chip *chip, int l, int force)
113 if (force || (ioread8(chip->vendor.iobase + TPM_ACCESS(l)) &
114 (TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID)) ==
115 (TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID))
116 iowrite8(TPM_ACCESS_ACTIVE_LOCALITY,
117 chip->vendor.iobase + TPM_ACCESS(l));
120 static int request_locality(struct tpm_chip *chip, int l)
122 unsigned long stop, timeout;
125 if (check_locality(chip, l) >= 0)
128 iowrite8(TPM_ACCESS_REQUEST_USE,
129 chip->vendor.iobase + TPM_ACCESS(l));
131 stop = jiffies + chip->vendor.timeout_a;
133 if (chip->vendor.irq) {
135 timeout = stop - jiffies;
136 if ((long)timeout <= 0)
138 rc = wait_event_interruptible_timeout(chip->vendor.int_queue,
144 if (rc == -ERESTARTSYS && freezing(current)) {
145 clear_thread_flag(TIF_SIGPENDING);
149 /* wait for burstcount */
151 if (check_locality(chip, l) >= 0)
155 while (time_before(jiffies, stop));
160 static u8 tpm_tis_status(struct tpm_chip *chip)
162 return ioread8(chip->vendor.iobase +
163 TPM_STS(chip->vendor.locality));
166 static void tpm_tis_ready(struct tpm_chip *chip)
168 /* this causes the current command to be aborted */
169 iowrite8(TPM_STS_COMMAND_READY,
170 chip->vendor.iobase + TPM_STS(chip->vendor.locality));
173 static int get_burstcount(struct tpm_chip *chip)
178 /* wait for burstcount */
179 /* which timeout value, spec has 2 answers (c & d) */
180 stop = jiffies + chip->vendor.timeout_d;
182 burstcnt = ioread8(chip->vendor.iobase +
183 TPM_STS(chip->vendor.locality) + 1);
184 burstcnt += ioread8(chip->vendor.iobase +
185 TPM_STS(chip->vendor.locality) +
190 } while (time_before(jiffies, stop));
194 static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
196 int size = 0, burstcnt;
197 while (size < count &&
198 wait_for_tpm_stat(chip,
199 TPM_STS_DATA_AVAIL | TPM_STS_VALID,
200 chip->vendor.timeout_c,
201 &chip->vendor.read_queue)
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.
212 static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
215 int expected, status;
217 if (count < TPM_HEADER_SIZE) {
222 /* read first 10 bytes, including tag, paramsize, and result */
224 recv_data(chip, buf, TPM_HEADER_SIZE)) < TPM_HEADER_SIZE) {
225 dev_err(chip->dev, "Unable to read header\n");
229 expected = be32_to_cpu(*(__be32 *) (buf + 2));
230 if (expected > count) {
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");
243 wait_for_tpm_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");
254 release_locality(chip, chip->vendor.locality, 0);
259 module_param(itpm, bool, 0444);
260 MODULE_PARM_DESC(itpm, "Force iTPM workarounds (found on some Lenovo laptops)");
263 * If interrupts are used (signaled by an irq set in the vendor structure)
264 * tpm.c can skip polling for the data to be available as the interrupt is
267 static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len)
269 int rc, status, burstcnt;
272 if (request_locality(chip, 0) < 0)
275 status = tpm_tis_status(chip);
276 if ((status & TPM_STS_COMMAND_READY) == 0) {
278 if (wait_for_tpm_stat
279 (chip, TPM_STS_COMMAND_READY, chip->vendor.timeout_b,
280 &chip->vendor.int_queue) < 0) {
286 while (count < len - 1) {
287 burstcnt = get_burstcount(chip);
288 for (; burstcnt > 0 && count < len - 1; burstcnt--) {
289 iowrite8(buf[count], chip->vendor.iobase +
290 TPM_DATA_FIFO(chip->vendor.locality));
294 wait_for_tpm_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c,
295 &chip->vendor.int_queue);
296 status = tpm_tis_status(chip);
297 if (!itpm && (status & TPM_STS_DATA_EXPECT) == 0) {
303 /* write last byte */
305 chip->vendor.iobase + TPM_DATA_FIFO(chip->vendor.locality));
306 wait_for_tpm_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c,
307 &chip->vendor.int_queue);
308 status = tpm_tis_status(chip);
309 if ((status & TPM_STS_DATA_EXPECT) != 0) {
318 release_locality(chip, chip->vendor.locality, 0);
323 * If interrupts are used (signaled by an irq set in the vendor structure)
324 * tpm.c can skip polling for the data to be available as the interrupt is
327 static int tpm_tis_send(struct tpm_chip *chip, u8 *buf, size_t len)
332 rc = tpm_tis_send_data(chip, buf, len);
338 chip->vendor.iobase + TPM_STS(chip->vendor.locality));
340 if (chip->vendor.irq) {
341 ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
342 if (wait_for_tpm_stat
343 (chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID,
344 tpm_calc_ordinal_duration(chip, ordinal),
345 &chip->vendor.read_queue) < 0) {
353 release_locality(chip, chip->vendor.locality, 0);
358 * Early probing for iTPM with STS_DATA_EXPECT flaw.
359 * Try sending command without itpm flag set and if that
360 * fails, repeat with itpm flag set.
362 static int probe_itpm(struct tpm_chip *chip)
365 u8 cmd_getticks[] = {
366 0x00, 0xc1, 0x00, 0x00, 0x00, 0x0a,
367 0x00, 0x00, 0x00, 0xf1
369 size_t len = sizeof(cmd_getticks);
370 bool rem_itpm = itpm;
371 u16 vendor = ioread16(chip->vendor.iobase + TPM_DID_VID(0));
373 /* probe only iTPMS */
374 if (vendor != TPM_VID_INTEL)
379 rc = tpm_tis_send_data(chip, cmd_getticks, len);
384 release_locality(chip, chip->vendor.locality, 0);
388 rc = tpm_tis_send_data(chip, cmd_getticks, len);
390 dev_info(chip->dev, "Detected an iTPM.\n");
398 release_locality(chip, chip->vendor.locality, 0);
403 static const struct file_operations tis_ops = {
404 .owner = THIS_MODULE,
409 .release = tpm_release,
412 static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
413 static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
414 static DEVICE_ATTR(enabled, S_IRUGO, tpm_show_enabled, NULL);
415 static DEVICE_ATTR(active, S_IRUGO, tpm_show_active, NULL);
416 static DEVICE_ATTR(owned, S_IRUGO, tpm_show_owned, NULL);
417 static DEVICE_ATTR(temp_deactivated, S_IRUGO, tpm_show_temp_deactivated,
419 static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps_1_2, NULL);
420 static DEVICE_ATTR(cancel, S_IWUSR | S_IWGRP, NULL, tpm_store_cancel);
421 static DEVICE_ATTR(durations, S_IRUGO, tpm_show_durations, NULL);
422 static DEVICE_ATTR(timeouts, S_IRUGO, tpm_show_timeouts, NULL);
424 static struct attribute *tis_attrs[] = {
425 &dev_attr_pubek.attr,
427 &dev_attr_enabled.attr,
428 &dev_attr_active.attr,
429 &dev_attr_owned.attr,
430 &dev_attr_temp_deactivated.attr,
432 &dev_attr_cancel.attr,
433 &dev_attr_durations.attr,
434 &dev_attr_timeouts.attr, NULL,
437 static struct attribute_group tis_attr_grp = {
441 static struct tpm_vendor_specific tpm_tis = {
442 .status = tpm_tis_status,
443 .recv = tpm_tis_recv,
444 .send = tpm_tis_send,
445 .cancel = tpm_tis_ready,
446 .req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
447 .req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
448 .req_canceled = TPM_STS_COMMAND_READY,
449 .attr_group = &tis_attr_grp,
454 static irqreturn_t tis_int_probe(int irq, void *dev_id)
456 struct tpm_chip *chip = dev_id;
459 interrupt = ioread32(chip->vendor.iobase +
460 TPM_INT_STATUS(chip->vendor.locality));
465 chip->vendor.probed_irq = irq;
467 /* Clear interrupts handled with TPM_EOI */
469 chip->vendor.iobase +
470 TPM_INT_STATUS(chip->vendor.locality));
474 static irqreturn_t tis_int_handler(int dummy, void *dev_id)
476 struct tpm_chip *chip = dev_id;
480 interrupt = ioread32(chip->vendor.iobase +
481 TPM_INT_STATUS(chip->vendor.locality));
486 if (interrupt & TPM_INTF_DATA_AVAIL_INT)
487 wake_up_interruptible(&chip->vendor.read_queue);
488 if (interrupt & TPM_INTF_LOCALITY_CHANGE_INT)
489 for (i = 0; i < 5; i++)
490 if (check_locality(chip, i) >= 0)
493 (TPM_INTF_LOCALITY_CHANGE_INT | TPM_INTF_STS_VALID_INT |
494 TPM_INTF_CMD_READY_INT))
495 wake_up_interruptible(&chip->vendor.int_queue);
497 /* Clear interrupts handled with TPM_EOI */
499 chip->vendor.iobase +
500 TPM_INT_STATUS(chip->vendor.locality));
501 ioread32(chip->vendor.iobase + TPM_INT_STATUS(chip->vendor.locality));
505 static bool interrupts = true;
506 module_param(interrupts, bool, 0444);
507 MODULE_PARM_DESC(interrupts, "Enable interrupts");
509 static int tpm_tis_init(struct device *dev, resource_size_t start,
510 resource_size_t len, unsigned int irq)
512 u32 vendor, intfcaps, intmask;
513 int rc, i, irq_s, irq_e, probe;
514 struct tpm_chip *chip;
516 if (!(chip = tpm_register_hardware(dev, &tpm_tis)))
519 chip->vendor.iobase = ioremap(start, len);
520 if (!chip->vendor.iobase) {
525 /* Default timeouts */
526 chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
527 chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
528 chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
529 chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
531 if (request_locality(chip, 0) != 0) {
536 vendor = ioread32(chip->vendor.iobase + TPM_DID_VID(0));
539 "1.2 TPM (device-id 0x%X, rev-id %d)\n",
540 vendor >> 16, ioread8(chip->vendor.iobase + TPM_RID(0)));
543 probe = probe_itpm(chip);
552 dev_info(dev, "Intel iTPM workaround enabled\n");
555 /* Figure out the capabilities */
557 ioread32(chip->vendor.iobase +
558 TPM_INTF_CAPS(chip->vendor.locality));
559 dev_dbg(dev, "TPM interface capabilities (0x%x):\n",
561 if (intfcaps & TPM_INTF_BURST_COUNT_STATIC)
562 dev_dbg(dev, "\tBurst Count Static\n");
563 if (intfcaps & TPM_INTF_CMD_READY_INT)
564 dev_dbg(dev, "\tCommand Ready Int Support\n");
565 if (intfcaps & TPM_INTF_INT_EDGE_FALLING)
566 dev_dbg(dev, "\tInterrupt Edge Falling\n");
567 if (intfcaps & TPM_INTF_INT_EDGE_RISING)
568 dev_dbg(dev, "\tInterrupt Edge Rising\n");
569 if (intfcaps & TPM_INTF_INT_LEVEL_LOW)
570 dev_dbg(dev, "\tInterrupt Level Low\n");
571 if (intfcaps & TPM_INTF_INT_LEVEL_HIGH)
572 dev_dbg(dev, "\tInterrupt Level High\n");
573 if (intfcaps & TPM_INTF_LOCALITY_CHANGE_INT)
574 dev_dbg(dev, "\tLocality Change Int Support\n");
575 if (intfcaps & TPM_INTF_STS_VALID_INT)
576 dev_dbg(dev, "\tSts Valid Int Support\n");
577 if (intfcaps & TPM_INTF_DATA_AVAIL_INT)
578 dev_dbg(dev, "\tData Avail Int Support\n");
580 /* get the timeouts before testing for irqs */
581 if (tpm_get_timeouts(chip)) {
582 dev_err(dev, "Could not get TPM timeouts and durations\n");
587 if (tpm_do_selftest(chip)) {
588 dev_err(dev, "TPM self test failed\n");
593 /* INTERRUPT Setup */
594 init_waitqueue_head(&chip->vendor.read_queue);
595 init_waitqueue_head(&chip->vendor.int_queue);
598 ioread32(chip->vendor.iobase +
599 TPM_INT_ENABLE(chip->vendor.locality));
601 intmask |= TPM_INTF_CMD_READY_INT
602 | TPM_INTF_LOCALITY_CHANGE_INT | TPM_INTF_DATA_AVAIL_INT
603 | TPM_INTF_STS_VALID_INT;
606 chip->vendor.iobase +
607 TPM_INT_ENABLE(chip->vendor.locality));
609 chip->vendor.irq = irq;
610 if (interrupts && !chip->vendor.irq) {
612 ioread8(chip->vendor.iobase +
613 TPM_INT_VECTOR(chip->vendor.locality));
621 for (i = irq_s; i <= irq_e && chip->vendor.irq == 0; i++) {
622 iowrite8(i, chip->vendor.iobase +
623 TPM_INT_VECTOR(chip->vendor.locality));
625 (i, tis_int_probe, IRQF_SHARED,
626 chip->vendor.miscdev.name, chip) != 0) {
628 "Unable to request irq: %d for probe\n",
633 /* Clear all existing */
635 (chip->vendor.iobase +
636 TPM_INT_STATUS(chip->vendor.locality)),
637 chip->vendor.iobase +
638 TPM_INT_STATUS(chip->vendor.locality));
641 iowrite32(intmask | TPM_GLOBAL_INT_ENABLE,
642 chip->vendor.iobase +
643 TPM_INT_ENABLE(chip->vendor.locality));
645 chip->vendor.probed_irq = 0;
647 /* Generate Interrupts */
648 tpm_gen_interrupt(chip);
650 chip->vendor.irq = chip->vendor.probed_irq;
652 /* free_irq will call into tis_int_probe;
653 clear all irqs we haven't seen while doing
656 (chip->vendor.iobase +
657 TPM_INT_STATUS(chip->vendor.locality)),
658 chip->vendor.iobase +
659 TPM_INT_STATUS(chip->vendor.locality));
663 chip->vendor.iobase +
664 TPM_INT_ENABLE(chip->vendor.locality));
668 if (chip->vendor.irq) {
669 iowrite8(chip->vendor.irq,
670 chip->vendor.iobase +
671 TPM_INT_VECTOR(chip->vendor.locality));
673 (chip->vendor.irq, tis_int_handler, IRQF_SHARED,
674 chip->vendor.miscdev.name, chip) != 0) {
676 "Unable to request irq: %d for use\n",
678 chip->vendor.irq = 0;
680 /* Clear all existing */
682 (chip->vendor.iobase +
683 TPM_INT_STATUS(chip->vendor.locality)),
684 chip->vendor.iobase +
685 TPM_INT_STATUS(chip->vendor.locality));
688 iowrite32(intmask | TPM_GLOBAL_INT_ENABLE,
689 chip->vendor.iobase +
690 TPM_INT_ENABLE(chip->vendor.locality));
694 INIT_LIST_HEAD(&chip->vendor.list);
695 mutex_lock(&tis_lock);
696 list_add(&chip->vendor.list, &tis_chips);
697 mutex_unlock(&tis_lock);
702 if (chip->vendor.iobase)
703 iounmap(chip->vendor.iobase);
704 tpm_remove_hardware(chip->dev);
708 #if defined(CONFIG_PNP) || defined(CONFIG_PM_SLEEP)
709 static void tpm_tis_reenable_interrupts(struct tpm_chip *chip)
713 /* reenable interrupts that device may have lost or
714 BIOS/firmware may have disabled */
715 iowrite8(chip->vendor.irq, chip->vendor.iobase +
716 TPM_INT_VECTOR(chip->vendor.locality));
719 ioread32(chip->vendor.iobase +
720 TPM_INT_ENABLE(chip->vendor.locality));
722 intmask |= TPM_INTF_CMD_READY_INT
723 | TPM_INTF_LOCALITY_CHANGE_INT | TPM_INTF_DATA_AVAIL_INT
724 | TPM_INTF_STS_VALID_INT | TPM_GLOBAL_INT_ENABLE;
727 chip->vendor.iobase + TPM_INT_ENABLE(chip->vendor.locality));
732 static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
733 const struct pnp_device_id *pnp_id)
735 resource_size_t start, len;
736 unsigned int irq = 0;
738 start = pnp_mem_start(pnp_dev, 0);
739 len = pnp_mem_len(pnp_dev, 0);
741 if (pnp_irq_valid(pnp_dev, 0))
742 irq = pnp_irq(pnp_dev, 0);
746 if (is_itpm(pnp_dev))
749 return tpm_tis_init(&pnp_dev->dev, start, len, irq);
752 static int tpm_tis_pnp_suspend(struct pnp_dev *dev, pm_message_t msg)
754 return tpm_pm_suspend(&dev->dev);
757 static int tpm_tis_pnp_resume(struct pnp_dev *dev)
759 struct tpm_chip *chip = pnp_get_drvdata(dev);
762 if (chip->vendor.irq)
763 tpm_tis_reenable_interrupts(chip);
765 ret = tpm_pm_resume(&dev->dev);
767 tpm_do_selftest(chip);
772 static struct pnp_device_id tpm_pnp_tbl[] = {
773 {"PNP0C31", 0}, /* TPM */
774 {"ATM1200", 0}, /* Atmel */
775 {"IFX0102", 0}, /* Infineon */
776 {"BCM0101", 0}, /* Broadcom */
777 {"BCM0102", 0}, /* Broadcom */
778 {"NSC1200", 0}, /* National */
779 {"ICO0102", 0}, /* Intel */
781 {"", 0}, /* User Specified */
782 {"", 0} /* Terminator */
784 MODULE_DEVICE_TABLE(pnp, tpm_pnp_tbl);
786 static void tpm_tis_pnp_remove(struct pnp_dev *dev)
788 struct tpm_chip *chip = pnp_get_drvdata(dev);
790 tpm_dev_vendor_release(chip);
796 static struct pnp_driver tis_pnp_driver = {
798 .id_table = tpm_pnp_tbl,
799 .probe = tpm_tis_pnp_init,
800 .suspend = tpm_tis_pnp_suspend,
801 .resume = tpm_tis_pnp_resume,
802 .remove = tpm_tis_pnp_remove,
805 #define TIS_HID_USR_IDX sizeof(tpm_pnp_tbl)/sizeof(struct pnp_device_id) -2
806 module_param_string(hid, tpm_pnp_tbl[TIS_HID_USR_IDX].id,
807 sizeof(tpm_pnp_tbl[TIS_HID_USR_IDX].id), 0444);
808 MODULE_PARM_DESC(hid, "Set additional specific HID for this driver to probe");
811 #ifdef CONFIG_PM_SLEEP
812 static int tpm_tis_resume(struct device *dev)
814 struct tpm_chip *chip = dev_get_drvdata(dev);
816 if (chip->vendor.irq)
817 tpm_tis_reenable_interrupts(chip);
819 return tpm_pm_resume(dev);
823 static SIMPLE_DEV_PM_OPS(tpm_tis_pm, tpm_pm_suspend, tpm_tis_resume);
825 static struct platform_driver tis_drv = {
828 .owner = THIS_MODULE,
833 static struct platform_device *pdev;
836 module_param(force, bool, 0444);
837 MODULE_PARM_DESC(force, "Force device probe rather than using ACPI entry");
838 static int __init init_tis(void)
843 return pnp_register_driver(&tis_pnp_driver);
846 rc = platform_driver_register(&tis_drv);
849 if (IS_ERR(pdev=platform_device_register_simple("tpm_tis", -1, NULL, 0)))
850 return PTR_ERR(pdev);
851 if((rc=tpm_tis_init(&pdev->dev, TIS_MEM_BASE, TIS_MEM_LEN, 0)) != 0) {
852 platform_device_unregister(pdev);
853 platform_driver_unregister(&tis_drv);
858 static void __exit cleanup_tis(void)
860 struct tpm_vendor_specific *i, *j;
861 struct tpm_chip *chip;
862 mutex_lock(&tis_lock);
863 list_for_each_entry_safe(i, j, &tis_chips, list) {
864 chip = to_tpm_chip(i);
865 tpm_remove_hardware(chip->dev);
866 iowrite32(~TPM_GLOBAL_INT_ENABLE &
867 ioread32(chip->vendor.iobase +
868 TPM_INT_ENABLE(chip->vendor.
870 chip->vendor.iobase +
871 TPM_INT_ENABLE(chip->vendor.locality));
872 release_locality(chip, chip->vendor.locality, 1);
873 if (chip->vendor.irq)
874 free_irq(chip->vendor.irq, chip);
878 mutex_unlock(&tis_lock);
881 pnp_unregister_driver(&tis_pnp_driver);
885 platform_device_unregister(pdev);
886 platform_driver_unregister(&tis_drv);
889 module_init(init_tis);
890 module_exit(cleanup_tis);
891 MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
892 MODULE_DESCRIPTION("TPM Driver");
893 MODULE_VERSION("2.0");
894 MODULE_LICENSE("GPL");