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;
90 list_for_each_entry(id, &acpi->pnp.ids, list) {
91 if (!strcmp("INTC0102", id->id))
98 static inline int is_itpm(struct pnp_dev *dev)
104 /* Before we attempt to access the TPM we must see that the valid bit is set.
105 * The specification says that this bit is 0 at reset and remains 0 until the
106 * 'TPM has gone through its self test and initialization and has established
107 * correct values in the other bits.' */
108 static int wait_startup(struct tpm_chip *chip, int l)
110 unsigned long stop = jiffies + chip->vendor.timeout_a;
112 if (ioread8(chip->vendor.iobase + TPM_ACCESS(l)) &
116 } while (time_before(jiffies, stop));
120 static int check_locality(struct tpm_chip *chip, int l)
122 if ((ioread8(chip->vendor.iobase + TPM_ACCESS(l)) &
123 (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) ==
124 (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID))
125 return chip->vendor.locality = l;
130 static void release_locality(struct tpm_chip *chip, int l, int force)
132 if (force || (ioread8(chip->vendor.iobase + TPM_ACCESS(l)) &
133 (TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID)) ==
134 (TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID))
135 iowrite8(TPM_ACCESS_ACTIVE_LOCALITY,
136 chip->vendor.iobase + TPM_ACCESS(l));
139 static int request_locality(struct tpm_chip *chip, int l)
141 unsigned long stop, timeout;
144 if (check_locality(chip, l) >= 0)
147 iowrite8(TPM_ACCESS_REQUEST_USE,
148 chip->vendor.iobase + TPM_ACCESS(l));
150 stop = jiffies + chip->vendor.timeout_a;
152 if (chip->vendor.irq) {
154 timeout = stop - jiffies;
155 if ((long)timeout <= 0)
157 rc = wait_event_interruptible_timeout(chip->vendor.int_queue,
163 if (rc == -ERESTARTSYS && freezing(current)) {
164 clear_thread_flag(TIF_SIGPENDING);
168 /* wait for burstcount */
170 if (check_locality(chip, l) >= 0)
174 while (time_before(jiffies, stop));
179 static u8 tpm_tis_status(struct tpm_chip *chip)
181 return ioread8(chip->vendor.iobase +
182 TPM_STS(chip->vendor.locality));
185 static void tpm_tis_ready(struct tpm_chip *chip)
187 /* this causes the current command to be aborted */
188 iowrite8(TPM_STS_COMMAND_READY,
189 chip->vendor.iobase + TPM_STS(chip->vendor.locality));
192 static int get_burstcount(struct tpm_chip *chip)
197 /* wait for burstcount */
198 /* which timeout value, spec has 2 answers (c & d) */
199 stop = jiffies + chip->vendor.timeout_d;
201 burstcnt = ioread8(chip->vendor.iobase +
202 TPM_STS(chip->vendor.locality) + 1);
203 burstcnt += ioread8(chip->vendor.iobase +
204 TPM_STS(chip->vendor.locality) +
209 } while (time_before(jiffies, stop));
213 static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
215 int size = 0, burstcnt;
216 while (size < count &&
217 wait_for_tpm_stat(chip,
218 TPM_STS_DATA_AVAIL | TPM_STS_VALID,
219 chip->vendor.timeout_c,
220 &chip->vendor.read_queue, true)
222 burstcnt = get_burstcount(chip);
223 for (; burstcnt > 0 && size < count; burstcnt--)
224 buf[size++] = ioread8(chip->vendor.iobase +
225 TPM_DATA_FIFO(chip->vendor.
231 static int tpm_tis_recv(struct tpm_chip *chip, u8 *buf, size_t count)
234 int expected, status;
236 if (count < TPM_HEADER_SIZE) {
241 /* read first 10 bytes, including tag, paramsize, and result */
243 recv_data(chip, buf, TPM_HEADER_SIZE)) < TPM_HEADER_SIZE) {
244 dev_err(chip->dev, "Unable to read header\n");
248 expected = be32_to_cpu(*(__be32 *) (buf + 2));
249 if (expected > count) {
255 recv_data(chip, &buf[TPM_HEADER_SIZE],
256 expected - TPM_HEADER_SIZE)) < expected) {
257 dev_err(chip->dev, "Unable to read remainder of result\n");
262 wait_for_tpm_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c,
263 &chip->vendor.int_queue, false);
264 status = tpm_tis_status(chip);
265 if (status & TPM_STS_DATA_AVAIL) { /* retry? */
266 dev_err(chip->dev, "Error left over data\n");
273 release_locality(chip, chip->vendor.locality, 0);
278 module_param(itpm, bool, 0444);
279 MODULE_PARM_DESC(itpm, "Force iTPM workarounds (found on some Lenovo laptops)");
282 * If interrupts are used (signaled by an irq set in the vendor structure)
283 * tpm.c can skip polling for the data to be available as the interrupt is
286 static int tpm_tis_send_data(struct tpm_chip *chip, u8 *buf, size_t len)
288 int rc, status, burstcnt;
291 if (request_locality(chip, 0) < 0)
294 status = tpm_tis_status(chip);
295 if ((status & TPM_STS_COMMAND_READY) == 0) {
297 if (wait_for_tpm_stat
298 (chip, TPM_STS_COMMAND_READY, chip->vendor.timeout_b,
299 &chip->vendor.int_queue, false) < 0) {
305 while (count < len - 1) {
306 burstcnt = get_burstcount(chip);
307 for (; burstcnt > 0 && count < len - 1; burstcnt--) {
308 iowrite8(buf[count], chip->vendor.iobase +
309 TPM_DATA_FIFO(chip->vendor.locality));
313 wait_for_tpm_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c,
314 &chip->vendor.int_queue, false);
315 status = tpm_tis_status(chip);
316 if (!itpm && (status & TPM_STS_DATA_EXPECT) == 0) {
322 /* write last byte */
324 chip->vendor.iobase + TPM_DATA_FIFO(chip->vendor.locality));
325 wait_for_tpm_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c,
326 &chip->vendor.int_queue, false);
327 status = tpm_tis_status(chip);
328 if ((status & TPM_STS_DATA_EXPECT) != 0) {
337 release_locality(chip, chip->vendor.locality, 0);
342 * If interrupts are used (signaled by an irq set in the vendor structure)
343 * tpm.c can skip polling for the data to be available as the interrupt is
346 static int tpm_tis_send(struct tpm_chip *chip, u8 *buf, size_t len)
351 rc = tpm_tis_send_data(chip, buf, len);
357 chip->vendor.iobase + TPM_STS(chip->vendor.locality));
359 if (chip->vendor.irq) {
360 ordinal = be32_to_cpu(*((__be32 *) (buf + 6)));
361 if (wait_for_tpm_stat
362 (chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID,
363 tpm_calc_ordinal_duration(chip, ordinal),
364 &chip->vendor.read_queue, false) < 0) {
372 release_locality(chip, chip->vendor.locality, 0);
377 * Early probing for iTPM with STS_DATA_EXPECT flaw.
378 * Try sending command without itpm flag set and if that
379 * fails, repeat with itpm flag set.
381 static int probe_itpm(struct tpm_chip *chip)
384 u8 cmd_getticks[] = {
385 0x00, 0xc1, 0x00, 0x00, 0x00, 0x0a,
386 0x00, 0x00, 0x00, 0xf1
388 size_t len = sizeof(cmd_getticks);
389 bool rem_itpm = itpm;
390 u16 vendor = ioread16(chip->vendor.iobase + TPM_DID_VID(0));
392 /* probe only iTPMS */
393 if (vendor != TPM_VID_INTEL)
398 rc = tpm_tis_send_data(chip, cmd_getticks, len);
403 release_locality(chip, chip->vendor.locality, 0);
407 rc = tpm_tis_send_data(chip, cmd_getticks, len);
409 dev_info(chip->dev, "Detected an iTPM.\n");
417 release_locality(chip, chip->vendor.locality, 0);
422 static bool tpm_tis_req_canceled(struct tpm_chip *chip, u8 status)
424 switch (chip->vendor.manufacturer_id) {
425 case TPM_VID_WINBOND:
426 return ((status == TPM_STS_VALID) ||
427 (status == (TPM_STS_VALID | TPM_STS_COMMAND_READY)));
429 return (status == (TPM_STS_VALID | TPM_STS_COMMAND_READY));
431 return (status == TPM_STS_COMMAND_READY);
435 static const struct file_operations tis_ops = {
436 .owner = THIS_MODULE,
441 .release = tpm_release,
444 static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
445 static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
446 static DEVICE_ATTR(enabled, S_IRUGO, tpm_show_enabled, NULL);
447 static DEVICE_ATTR(active, S_IRUGO, tpm_show_active, NULL);
448 static DEVICE_ATTR(owned, S_IRUGO, tpm_show_owned, NULL);
449 static DEVICE_ATTR(temp_deactivated, S_IRUGO, tpm_show_temp_deactivated,
451 static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps_1_2, NULL);
452 static DEVICE_ATTR(cancel, S_IWUSR | S_IWGRP, NULL, tpm_store_cancel);
453 static DEVICE_ATTR(durations, S_IRUGO, tpm_show_durations, NULL);
454 static DEVICE_ATTR(timeouts, S_IRUGO, tpm_show_timeouts, NULL);
456 static struct attribute *tis_attrs[] = {
457 &dev_attr_pubek.attr,
459 &dev_attr_enabled.attr,
460 &dev_attr_active.attr,
461 &dev_attr_owned.attr,
462 &dev_attr_temp_deactivated.attr,
464 &dev_attr_cancel.attr,
465 &dev_attr_durations.attr,
466 &dev_attr_timeouts.attr, NULL,
469 static struct attribute_group tis_attr_grp = {
473 static struct tpm_vendor_specific tpm_tis = {
474 .status = tpm_tis_status,
475 .recv = tpm_tis_recv,
476 .send = tpm_tis_send,
477 .cancel = tpm_tis_ready,
478 .req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
479 .req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
480 .req_canceled = tpm_tis_req_canceled,
481 .attr_group = &tis_attr_grp,
486 static irqreturn_t tis_int_probe(int irq, void *dev_id)
488 struct tpm_chip *chip = dev_id;
491 interrupt = ioread32(chip->vendor.iobase +
492 TPM_INT_STATUS(chip->vendor.locality));
497 chip->vendor.probed_irq = irq;
499 /* Clear interrupts handled with TPM_EOI */
501 chip->vendor.iobase +
502 TPM_INT_STATUS(chip->vendor.locality));
506 static irqreturn_t tis_int_handler(int dummy, void *dev_id)
508 struct tpm_chip *chip = dev_id;
512 interrupt = ioread32(chip->vendor.iobase +
513 TPM_INT_STATUS(chip->vendor.locality));
518 if (interrupt & TPM_INTF_DATA_AVAIL_INT)
519 wake_up_interruptible(&chip->vendor.read_queue);
520 if (interrupt & TPM_INTF_LOCALITY_CHANGE_INT)
521 for (i = 0; i < 5; i++)
522 if (check_locality(chip, i) >= 0)
525 (TPM_INTF_LOCALITY_CHANGE_INT | TPM_INTF_STS_VALID_INT |
526 TPM_INTF_CMD_READY_INT))
527 wake_up_interruptible(&chip->vendor.int_queue);
529 /* Clear interrupts handled with TPM_EOI */
531 chip->vendor.iobase +
532 TPM_INT_STATUS(chip->vendor.locality));
533 ioread32(chip->vendor.iobase + TPM_INT_STATUS(chip->vendor.locality));
537 static bool interrupts = true;
538 module_param(interrupts, bool, 0444);
539 MODULE_PARM_DESC(interrupts, "Enable interrupts");
541 static int tpm_tis_init(struct device *dev, resource_size_t start,
542 resource_size_t len, unsigned int irq)
544 u32 vendor, intfcaps, intmask;
545 int rc, i, irq_s, irq_e, probe;
546 struct tpm_chip *chip;
548 if (!(chip = tpm_register_hardware(dev, &tpm_tis)))
551 chip->vendor.iobase = ioremap(start, len);
552 if (!chip->vendor.iobase) {
557 /* Default timeouts */
558 chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
559 chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
560 chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
561 chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
563 if (wait_startup(chip, 0) != 0) {
568 if (request_locality(chip, 0) != 0) {
573 vendor = ioread32(chip->vendor.iobase + TPM_DID_VID(0));
574 chip->vendor.manufacturer_id = vendor;
577 "1.2 TPM (device-id 0x%X, rev-id %d)\n",
578 vendor >> 16, ioread8(chip->vendor.iobase + TPM_RID(0)));
581 probe = probe_itpm(chip);
590 dev_info(dev, "Intel iTPM workaround enabled\n");
593 /* Figure out the capabilities */
595 ioread32(chip->vendor.iobase +
596 TPM_INTF_CAPS(chip->vendor.locality));
597 dev_dbg(dev, "TPM interface capabilities (0x%x):\n",
599 if (intfcaps & TPM_INTF_BURST_COUNT_STATIC)
600 dev_dbg(dev, "\tBurst Count Static\n");
601 if (intfcaps & TPM_INTF_CMD_READY_INT)
602 dev_dbg(dev, "\tCommand Ready Int Support\n");
603 if (intfcaps & TPM_INTF_INT_EDGE_FALLING)
604 dev_dbg(dev, "\tInterrupt Edge Falling\n");
605 if (intfcaps & TPM_INTF_INT_EDGE_RISING)
606 dev_dbg(dev, "\tInterrupt Edge Rising\n");
607 if (intfcaps & TPM_INTF_INT_LEVEL_LOW)
608 dev_dbg(dev, "\tInterrupt Level Low\n");
609 if (intfcaps & TPM_INTF_INT_LEVEL_HIGH)
610 dev_dbg(dev, "\tInterrupt Level High\n");
611 if (intfcaps & TPM_INTF_LOCALITY_CHANGE_INT)
612 dev_dbg(dev, "\tLocality Change Int Support\n");
613 if (intfcaps & TPM_INTF_STS_VALID_INT)
614 dev_dbg(dev, "\tSts Valid Int Support\n");
615 if (intfcaps & TPM_INTF_DATA_AVAIL_INT)
616 dev_dbg(dev, "\tData Avail Int Support\n");
618 /* get the timeouts before testing for irqs */
619 if (tpm_get_timeouts(chip)) {
620 dev_err(dev, "Could not get TPM timeouts and durations\n");
625 if (tpm_do_selftest(chip)) {
626 dev_err(dev, "TPM self test failed\n");
631 /* INTERRUPT Setup */
632 init_waitqueue_head(&chip->vendor.read_queue);
633 init_waitqueue_head(&chip->vendor.int_queue);
636 ioread32(chip->vendor.iobase +
637 TPM_INT_ENABLE(chip->vendor.locality));
639 intmask |= TPM_INTF_CMD_READY_INT
640 | TPM_INTF_LOCALITY_CHANGE_INT | TPM_INTF_DATA_AVAIL_INT
641 | TPM_INTF_STS_VALID_INT;
644 chip->vendor.iobase +
645 TPM_INT_ENABLE(chip->vendor.locality));
647 chip->vendor.irq = irq;
648 if (interrupts && !chip->vendor.irq) {
650 ioread8(chip->vendor.iobase +
651 TPM_INT_VECTOR(chip->vendor.locality));
659 for (i = irq_s; i <= irq_e && chip->vendor.irq == 0; i++) {
660 iowrite8(i, chip->vendor.iobase +
661 TPM_INT_VECTOR(chip->vendor.locality));
663 (i, tis_int_probe, IRQF_SHARED,
664 chip->vendor.miscdev.name, chip) != 0) {
666 "Unable to request irq: %d for probe\n",
671 /* Clear all existing */
673 (chip->vendor.iobase +
674 TPM_INT_STATUS(chip->vendor.locality)),
675 chip->vendor.iobase +
676 TPM_INT_STATUS(chip->vendor.locality));
679 iowrite32(intmask | TPM_GLOBAL_INT_ENABLE,
680 chip->vendor.iobase +
681 TPM_INT_ENABLE(chip->vendor.locality));
683 chip->vendor.probed_irq = 0;
685 /* Generate Interrupts */
686 tpm_gen_interrupt(chip);
688 chip->vendor.irq = chip->vendor.probed_irq;
690 /* free_irq will call into tis_int_probe;
691 clear all irqs we haven't seen while doing
694 (chip->vendor.iobase +
695 TPM_INT_STATUS(chip->vendor.locality)),
696 chip->vendor.iobase +
697 TPM_INT_STATUS(chip->vendor.locality));
701 chip->vendor.iobase +
702 TPM_INT_ENABLE(chip->vendor.locality));
706 if (chip->vendor.irq) {
707 iowrite8(chip->vendor.irq,
708 chip->vendor.iobase +
709 TPM_INT_VECTOR(chip->vendor.locality));
711 (chip->vendor.irq, tis_int_handler, IRQF_SHARED,
712 chip->vendor.miscdev.name, chip) != 0) {
714 "Unable to request irq: %d for use\n",
716 chip->vendor.irq = 0;
718 /* Clear all existing */
720 (chip->vendor.iobase +
721 TPM_INT_STATUS(chip->vendor.locality)),
722 chip->vendor.iobase +
723 TPM_INT_STATUS(chip->vendor.locality));
726 iowrite32(intmask | TPM_GLOBAL_INT_ENABLE,
727 chip->vendor.iobase +
728 TPM_INT_ENABLE(chip->vendor.locality));
732 INIT_LIST_HEAD(&chip->vendor.list);
733 mutex_lock(&tis_lock);
734 list_add(&chip->vendor.list, &tis_chips);
735 mutex_unlock(&tis_lock);
740 if (chip->vendor.iobase)
741 iounmap(chip->vendor.iobase);
742 tpm_remove_hardware(chip->dev);
746 #if defined(CONFIG_PNP) || defined(CONFIG_PM_SLEEP)
747 static void tpm_tis_reenable_interrupts(struct tpm_chip *chip)
751 /* reenable interrupts that device may have lost or
752 BIOS/firmware may have disabled */
753 iowrite8(chip->vendor.irq, chip->vendor.iobase +
754 TPM_INT_VECTOR(chip->vendor.locality));
757 ioread32(chip->vendor.iobase +
758 TPM_INT_ENABLE(chip->vendor.locality));
760 intmask |= TPM_INTF_CMD_READY_INT
761 | TPM_INTF_LOCALITY_CHANGE_INT | TPM_INTF_DATA_AVAIL_INT
762 | TPM_INTF_STS_VALID_INT | TPM_GLOBAL_INT_ENABLE;
765 chip->vendor.iobase + TPM_INT_ENABLE(chip->vendor.locality));
770 static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
771 const struct pnp_device_id *pnp_id)
773 resource_size_t start, len;
774 unsigned int irq = 0;
776 start = pnp_mem_start(pnp_dev, 0);
777 len = pnp_mem_len(pnp_dev, 0);
779 if (pnp_irq_valid(pnp_dev, 0))
780 irq = pnp_irq(pnp_dev, 0);
784 if (is_itpm(pnp_dev))
787 return tpm_tis_init(&pnp_dev->dev, start, len, irq);
790 static int tpm_tis_pnp_suspend(struct pnp_dev *dev, pm_message_t msg)
792 return tpm_pm_suspend(&dev->dev);
795 static int tpm_tis_pnp_resume(struct pnp_dev *dev)
797 struct tpm_chip *chip = pnp_get_drvdata(dev);
800 if (chip->vendor.irq)
801 tpm_tis_reenable_interrupts(chip);
803 ret = tpm_pm_resume(&dev->dev);
805 tpm_do_selftest(chip);
810 static struct pnp_device_id tpm_pnp_tbl[] = {
811 {"PNP0C31", 0}, /* TPM */
812 {"ATM1200", 0}, /* Atmel */
813 {"IFX0102", 0}, /* Infineon */
814 {"BCM0101", 0}, /* Broadcom */
815 {"BCM0102", 0}, /* Broadcom */
816 {"NSC1200", 0}, /* National */
817 {"ICO0102", 0}, /* Intel */
819 {"", 0}, /* User Specified */
820 {"", 0} /* Terminator */
822 MODULE_DEVICE_TABLE(pnp, tpm_pnp_tbl);
824 static void tpm_tis_pnp_remove(struct pnp_dev *dev)
826 struct tpm_chip *chip = pnp_get_drvdata(dev);
828 tpm_dev_vendor_release(chip);
834 static struct pnp_driver tis_pnp_driver = {
836 .id_table = tpm_pnp_tbl,
837 .probe = tpm_tis_pnp_init,
838 .suspend = tpm_tis_pnp_suspend,
839 .resume = tpm_tis_pnp_resume,
840 .remove = tpm_tis_pnp_remove,
843 #define TIS_HID_USR_IDX sizeof(tpm_pnp_tbl)/sizeof(struct pnp_device_id) -2
844 module_param_string(hid, tpm_pnp_tbl[TIS_HID_USR_IDX].id,
845 sizeof(tpm_pnp_tbl[TIS_HID_USR_IDX].id), 0444);
846 MODULE_PARM_DESC(hid, "Set additional specific HID for this driver to probe");
849 #ifdef CONFIG_PM_SLEEP
850 static int tpm_tis_resume(struct device *dev)
852 struct tpm_chip *chip = dev_get_drvdata(dev);
854 if (chip->vendor.irq)
855 tpm_tis_reenable_interrupts(chip);
857 return tpm_pm_resume(dev);
861 static SIMPLE_DEV_PM_OPS(tpm_tis_pm, tpm_pm_suspend, tpm_tis_resume);
863 static struct platform_driver tis_drv = {
866 .owner = THIS_MODULE,
871 static struct platform_device *pdev;
874 module_param(force, bool, 0444);
875 MODULE_PARM_DESC(force, "Force device probe rather than using ACPI entry");
876 static int __init init_tis(void)
881 return pnp_register_driver(&tis_pnp_driver);
884 rc = platform_driver_register(&tis_drv);
887 if (IS_ERR(pdev=platform_device_register_simple("tpm_tis", -1, NULL, 0)))
888 return PTR_ERR(pdev);
889 if((rc=tpm_tis_init(&pdev->dev, TIS_MEM_BASE, TIS_MEM_LEN, 0)) != 0) {
890 platform_device_unregister(pdev);
891 platform_driver_unregister(&tis_drv);
896 static void __exit cleanup_tis(void)
898 struct tpm_vendor_specific *i, *j;
899 struct tpm_chip *chip;
900 mutex_lock(&tis_lock);
901 list_for_each_entry_safe(i, j, &tis_chips, list) {
902 chip = to_tpm_chip(i);
903 tpm_remove_hardware(chip->dev);
904 iowrite32(~TPM_GLOBAL_INT_ENABLE &
905 ioread32(chip->vendor.iobase +
906 TPM_INT_ENABLE(chip->vendor.
908 chip->vendor.iobase +
909 TPM_INT_ENABLE(chip->vendor.locality));
910 release_locality(chip, chip->vendor.locality, 1);
911 if (chip->vendor.irq)
912 free_irq(chip->vendor.irq, chip);
916 mutex_unlock(&tis_lock);
919 pnp_unregister_driver(&tis_pnp_driver);
923 platform_device_unregister(pdev);
924 platform_driver_unregister(&tis_drv);
927 module_init(init_tis);
928 module_exit(cleanup_tis);
929 MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
930 MODULE_DESCRIPTION("TPM Driver");
931 MODULE_VERSION("2.0");
932 MODULE_LICENSE("GPL");