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);
376 struct tis_vendor_timeout_override {
378 unsigned long timeout_us[4];
381 static const struct tis_vendor_timeout_override vendor_timeout_overrides[] = {
383 { 0x32041114, { (TIS_SHORT_TIMEOUT*1000), (TIS_LONG_TIMEOUT*1000),
384 (TIS_SHORT_TIMEOUT*1000), (TIS_SHORT_TIMEOUT*1000) } },
387 static bool tpm_tis_update_timeouts(struct tpm_chip *chip,
388 unsigned long *timeout_cap)
393 did_vid = ioread32(chip->vendor.iobase + TPM_DID_VID(0));
395 for (i = 0; i != ARRAY_SIZE(vendor_timeout_overrides); i++) {
396 if (vendor_timeout_overrides[i].did_vid != did_vid)
398 memcpy(timeout_cap, vendor_timeout_overrides[i].timeout_us,
399 sizeof(vendor_timeout_overrides[i].timeout_us));
407 * Early probing for iTPM with STS_DATA_EXPECT flaw.
408 * Try sending command without itpm flag set and if that
409 * fails, repeat with itpm flag set.
411 static int probe_itpm(struct tpm_chip *chip)
414 u8 cmd_getticks[] = {
415 0x00, 0xc1, 0x00, 0x00, 0x00, 0x0a,
416 0x00, 0x00, 0x00, 0xf1
418 size_t len = sizeof(cmd_getticks);
419 bool rem_itpm = itpm;
420 u16 vendor = ioread16(chip->vendor.iobase + TPM_DID_VID(0));
422 /* probe only iTPMS */
423 if (vendor != TPM_VID_INTEL)
428 rc = tpm_tis_send_data(chip, cmd_getticks, len);
433 release_locality(chip, chip->vendor.locality, 0);
437 rc = tpm_tis_send_data(chip, cmd_getticks, len);
439 dev_info(chip->dev, "Detected an iTPM.\n");
447 release_locality(chip, chip->vendor.locality, 0);
452 static bool tpm_tis_req_canceled(struct tpm_chip *chip, u8 status)
454 switch (chip->vendor.manufacturer_id) {
455 case TPM_VID_WINBOND:
456 return ((status == TPM_STS_VALID) ||
457 (status == (TPM_STS_VALID | TPM_STS_COMMAND_READY)));
459 return (status == (TPM_STS_VALID | TPM_STS_COMMAND_READY));
461 return (status == TPM_STS_COMMAND_READY);
465 static const struct tpm_class_ops tpm_tis = {
466 .status = tpm_tis_status,
467 .recv = tpm_tis_recv,
468 .send = tpm_tis_send,
469 .cancel = tpm_tis_ready,
470 .update_timeouts = tpm_tis_update_timeouts,
471 .req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
472 .req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
473 .req_canceled = tpm_tis_req_canceled,
476 static irqreturn_t tis_int_probe(int irq, void *dev_id)
478 struct tpm_chip *chip = dev_id;
481 interrupt = ioread32(chip->vendor.iobase +
482 TPM_INT_STATUS(chip->vendor.locality));
487 chip->vendor.probed_irq = irq;
489 /* Clear interrupts handled with TPM_EOI */
491 chip->vendor.iobase +
492 TPM_INT_STATUS(chip->vendor.locality));
496 static irqreturn_t tis_int_handler(int dummy, void *dev_id)
498 struct tpm_chip *chip = dev_id;
502 interrupt = ioread32(chip->vendor.iobase +
503 TPM_INT_STATUS(chip->vendor.locality));
508 if (interrupt & TPM_INTF_DATA_AVAIL_INT)
509 wake_up_interruptible(&chip->vendor.read_queue);
510 if (interrupt & TPM_INTF_LOCALITY_CHANGE_INT)
511 for (i = 0; i < 5; i++)
512 if (check_locality(chip, i) >= 0)
515 (TPM_INTF_LOCALITY_CHANGE_INT | TPM_INTF_STS_VALID_INT |
516 TPM_INTF_CMD_READY_INT))
517 wake_up_interruptible(&chip->vendor.int_queue);
519 /* Clear interrupts handled with TPM_EOI */
521 chip->vendor.iobase +
522 TPM_INT_STATUS(chip->vendor.locality));
523 ioread32(chip->vendor.iobase + TPM_INT_STATUS(chip->vendor.locality));
527 static bool interrupts = true;
528 module_param(interrupts, bool, 0444);
529 MODULE_PARM_DESC(interrupts, "Enable interrupts");
531 static int tpm_tis_init(struct device *dev, resource_size_t start,
532 resource_size_t len, unsigned int irq)
534 u32 vendor, intfcaps, intmask;
535 int rc, i, irq_s, irq_e, probe;
536 struct tpm_chip *chip;
538 if (!(chip = tpm_register_hardware(dev, &tpm_tis)))
541 chip->vendor.iobase = ioremap(start, len);
542 if (!chip->vendor.iobase) {
547 /* Default timeouts */
548 chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
549 chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
550 chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
551 chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
553 if (wait_startup(chip, 0) != 0) {
558 if (request_locality(chip, 0) != 0) {
563 vendor = ioread32(chip->vendor.iobase + TPM_DID_VID(0));
564 chip->vendor.manufacturer_id = vendor;
567 "1.2 TPM (device-id 0x%X, rev-id %d)\n",
568 vendor >> 16, ioread8(chip->vendor.iobase + TPM_RID(0)));
571 probe = probe_itpm(chip);
580 dev_info(dev, "Intel iTPM workaround enabled\n");
583 /* Figure out the capabilities */
585 ioread32(chip->vendor.iobase +
586 TPM_INTF_CAPS(chip->vendor.locality));
587 dev_dbg(dev, "TPM interface capabilities (0x%x):\n",
589 if (intfcaps & TPM_INTF_BURST_COUNT_STATIC)
590 dev_dbg(dev, "\tBurst Count Static\n");
591 if (intfcaps & TPM_INTF_CMD_READY_INT)
592 dev_dbg(dev, "\tCommand Ready Int Support\n");
593 if (intfcaps & TPM_INTF_INT_EDGE_FALLING)
594 dev_dbg(dev, "\tInterrupt Edge Falling\n");
595 if (intfcaps & TPM_INTF_INT_EDGE_RISING)
596 dev_dbg(dev, "\tInterrupt Edge Rising\n");
597 if (intfcaps & TPM_INTF_INT_LEVEL_LOW)
598 dev_dbg(dev, "\tInterrupt Level Low\n");
599 if (intfcaps & TPM_INTF_INT_LEVEL_HIGH)
600 dev_dbg(dev, "\tInterrupt Level High\n");
601 if (intfcaps & TPM_INTF_LOCALITY_CHANGE_INT)
602 dev_dbg(dev, "\tLocality Change Int Support\n");
603 if (intfcaps & TPM_INTF_STS_VALID_INT)
604 dev_dbg(dev, "\tSts Valid Int Support\n");
605 if (intfcaps & TPM_INTF_DATA_AVAIL_INT)
606 dev_dbg(dev, "\tData Avail Int Support\n");
608 /* get the timeouts before testing for irqs */
609 if (tpm_get_timeouts(chip)) {
610 dev_err(dev, "Could not get TPM timeouts and durations\n");
615 if (tpm_do_selftest(chip)) {
616 dev_err(dev, "TPM self test failed\n");
621 /* INTERRUPT Setup */
622 init_waitqueue_head(&chip->vendor.read_queue);
623 init_waitqueue_head(&chip->vendor.int_queue);
626 ioread32(chip->vendor.iobase +
627 TPM_INT_ENABLE(chip->vendor.locality));
629 intmask |= TPM_INTF_CMD_READY_INT
630 | TPM_INTF_LOCALITY_CHANGE_INT | TPM_INTF_DATA_AVAIL_INT
631 | TPM_INTF_STS_VALID_INT;
634 chip->vendor.iobase +
635 TPM_INT_ENABLE(chip->vendor.locality));
637 chip->vendor.irq = irq;
638 if (interrupts && !chip->vendor.irq) {
640 ioread8(chip->vendor.iobase +
641 TPM_INT_VECTOR(chip->vendor.locality));
649 for (i = irq_s; i <= irq_e && chip->vendor.irq == 0; i++) {
650 iowrite8(i, chip->vendor.iobase +
651 TPM_INT_VECTOR(chip->vendor.locality));
653 (i, tis_int_probe, IRQF_SHARED,
654 chip->vendor.miscdev.name, chip) != 0) {
656 "Unable to request irq: %d for probe\n",
661 /* Clear all existing */
663 (chip->vendor.iobase +
664 TPM_INT_STATUS(chip->vendor.locality)),
665 chip->vendor.iobase +
666 TPM_INT_STATUS(chip->vendor.locality));
669 iowrite32(intmask | TPM_GLOBAL_INT_ENABLE,
670 chip->vendor.iobase +
671 TPM_INT_ENABLE(chip->vendor.locality));
673 chip->vendor.probed_irq = 0;
675 /* Generate Interrupts */
676 tpm_gen_interrupt(chip);
678 chip->vendor.irq = chip->vendor.probed_irq;
680 /* free_irq will call into tis_int_probe;
681 clear all irqs we haven't seen while doing
684 (chip->vendor.iobase +
685 TPM_INT_STATUS(chip->vendor.locality)),
686 chip->vendor.iobase +
687 TPM_INT_STATUS(chip->vendor.locality));
691 chip->vendor.iobase +
692 TPM_INT_ENABLE(chip->vendor.locality));
696 if (chip->vendor.irq) {
697 iowrite8(chip->vendor.irq,
698 chip->vendor.iobase +
699 TPM_INT_VECTOR(chip->vendor.locality));
701 (chip->vendor.irq, tis_int_handler, IRQF_SHARED,
702 chip->vendor.miscdev.name, chip) != 0) {
704 "Unable to request irq: %d for use\n",
706 chip->vendor.irq = 0;
708 /* Clear all existing */
710 (chip->vendor.iobase +
711 TPM_INT_STATUS(chip->vendor.locality)),
712 chip->vendor.iobase +
713 TPM_INT_STATUS(chip->vendor.locality));
716 iowrite32(intmask | TPM_GLOBAL_INT_ENABLE,
717 chip->vendor.iobase +
718 TPM_INT_ENABLE(chip->vendor.locality));
722 INIT_LIST_HEAD(&chip->vendor.list);
723 mutex_lock(&tis_lock);
724 list_add(&chip->vendor.list, &tis_chips);
725 mutex_unlock(&tis_lock);
730 if (chip->vendor.iobase)
731 iounmap(chip->vendor.iobase);
732 tpm_remove_hardware(chip->dev);
736 #ifdef CONFIG_PM_SLEEP
737 static void tpm_tis_reenable_interrupts(struct tpm_chip *chip)
741 /* reenable interrupts that device may have lost or
742 BIOS/firmware may have disabled */
743 iowrite8(chip->vendor.irq, chip->vendor.iobase +
744 TPM_INT_VECTOR(chip->vendor.locality));
747 ioread32(chip->vendor.iobase +
748 TPM_INT_ENABLE(chip->vendor.locality));
750 intmask |= TPM_INTF_CMD_READY_INT
751 | TPM_INTF_LOCALITY_CHANGE_INT | TPM_INTF_DATA_AVAIL_INT
752 | TPM_INTF_STS_VALID_INT | TPM_GLOBAL_INT_ENABLE;
755 chip->vendor.iobase + TPM_INT_ENABLE(chip->vendor.locality));
758 static int tpm_tis_resume(struct device *dev)
760 struct tpm_chip *chip = dev_get_drvdata(dev);
763 if (chip->vendor.irq)
764 tpm_tis_reenable_interrupts(chip);
766 ret = tpm_pm_resume(dev);
768 tpm_do_selftest(chip);
774 static SIMPLE_DEV_PM_OPS(tpm_tis_pm, tpm_pm_suspend, tpm_tis_resume);
777 static int tpm_tis_pnp_init(struct pnp_dev *pnp_dev,
778 const struct pnp_device_id *pnp_id)
780 resource_size_t start, len;
781 unsigned int irq = 0;
783 start = pnp_mem_start(pnp_dev, 0);
784 len = pnp_mem_len(pnp_dev, 0);
786 if (pnp_irq_valid(pnp_dev, 0))
787 irq = pnp_irq(pnp_dev, 0);
791 if (is_itpm(pnp_dev))
794 return tpm_tis_init(&pnp_dev->dev, start, len, irq);
797 static struct pnp_device_id tpm_pnp_tbl[] = {
798 {"PNP0C31", 0}, /* TPM */
799 {"ATM1200", 0}, /* Atmel */
800 {"IFX0102", 0}, /* Infineon */
801 {"BCM0101", 0}, /* Broadcom */
802 {"BCM0102", 0}, /* Broadcom */
803 {"NSC1200", 0}, /* National */
804 {"ICO0102", 0}, /* Intel */
806 {"", 0}, /* User Specified */
807 {"", 0} /* Terminator */
809 MODULE_DEVICE_TABLE(pnp, tpm_pnp_tbl);
811 static void tpm_tis_pnp_remove(struct pnp_dev *dev)
813 struct tpm_chip *chip = pnp_get_drvdata(dev);
815 tpm_dev_vendor_release(chip);
821 static struct pnp_driver tis_pnp_driver = {
823 .id_table = tpm_pnp_tbl,
824 .probe = tpm_tis_pnp_init,
825 .remove = tpm_tis_pnp_remove,
831 #define TIS_HID_USR_IDX sizeof(tpm_pnp_tbl)/sizeof(struct pnp_device_id) -2
832 module_param_string(hid, tpm_pnp_tbl[TIS_HID_USR_IDX].id,
833 sizeof(tpm_pnp_tbl[TIS_HID_USR_IDX].id), 0444);
834 MODULE_PARM_DESC(hid, "Set additional specific HID for this driver to probe");
837 static struct platform_driver tis_drv = {
840 .owner = THIS_MODULE,
845 static struct platform_device *pdev;
848 module_param(force, bool, 0444);
849 MODULE_PARM_DESC(force, "Force device probe rather than using ACPI entry");
850 static int __init init_tis(void)
855 return pnp_register_driver(&tis_pnp_driver);
858 rc = platform_driver_register(&tis_drv);
861 pdev = platform_device_register_simple("tpm_tis", -1, NULL, 0);
866 rc = tpm_tis_init(&pdev->dev, TIS_MEM_BASE, TIS_MEM_LEN, 0);
871 platform_device_unregister(pdev);
873 platform_driver_unregister(&tis_drv);
877 static void __exit cleanup_tis(void)
879 struct tpm_vendor_specific *i, *j;
880 struct tpm_chip *chip;
881 mutex_lock(&tis_lock);
882 list_for_each_entry_safe(i, j, &tis_chips, list) {
883 chip = to_tpm_chip(i);
884 tpm_remove_hardware(chip->dev);
885 iowrite32(~TPM_GLOBAL_INT_ENABLE &
886 ioread32(chip->vendor.iobase +
887 TPM_INT_ENABLE(chip->vendor.
889 chip->vendor.iobase +
890 TPM_INT_ENABLE(chip->vendor.locality));
891 release_locality(chip, chip->vendor.locality, 1);
892 if (chip->vendor.irq)
893 free_irq(chip->vendor.irq, chip);
897 mutex_unlock(&tis_lock);
900 pnp_unregister_driver(&tis_pnp_driver);
904 platform_device_unregister(pdev);
905 platform_driver_unregister(&tis_drv);
908 module_init(init_tis);
909 module_exit(cleanup_tis);
910 MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
911 MODULE_DESCRIPTION("TPM Driver");
912 MODULE_VERSION("2.0");
913 MODULE_LICENSE("GPL");