2 * Copyright (C) 2005, 2006 IBM Corporation
3 * Copyright (C) 2014, 2015 Intel Corporation
6 * Leendert van Doorn <leendert@watson.ibm.com>
7 * Kylene Hall <kjhall@us.ibm.com>
9 * Maintained by: <tpmdd-devel@lists.sourceforge.net>
11 * Device driver for TCG/TCPA TPM (trusted platform module).
12 * Specifications at www.trustedcomputinggroup.org
14 * This device driver implements the TPM interface as defined in
15 * the TCG TPM Interface Spec version 1.2, revision 1.0.
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation, version 2 of the
22 #include <linux/init.h>
23 #include <linux/module.h>
24 #include <linux/moduleparam.h>
25 #include <linux/pnp.h>
26 #include <linux/slab.h>
27 #include <linux/interrupt.h>
28 #include <linux/wait.h>
29 #include <linux/acpi.h>
30 #include <linux/freezer.h>
32 #include "tpm_tis_core.h"
34 /* Before we attempt to access the TPM we must see that the valid bit is set.
35 * The specification says that this bit is 0 at reset and remains 0 until the
36 * 'TPM has gone through its self test and initialization and has established
37 * correct values in the other bits.'
39 static int wait_startup(struct tpm_chip
*chip
, int l
)
41 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
42 unsigned long stop
= jiffies
+ chip
->timeout_a
;
48 rc
= tpm_tis_read8(priv
, TPM_ACCESS(l
), &access
);
52 if (access
& TPM_ACCESS_VALID
)
55 } while (time_before(jiffies
, stop
));
59 static bool check_locality(struct tpm_chip
*chip
, int l
)
61 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
65 rc
= tpm_tis_read8(priv
, TPM_ACCESS(l
), &access
);
69 if ((access
& (TPM_ACCESS_ACTIVE_LOCALITY
| TPM_ACCESS_VALID
)) ==
70 (TPM_ACCESS_ACTIVE_LOCALITY
| TPM_ACCESS_VALID
)) {
78 static void release_locality(struct tpm_chip
*chip
, int l
)
80 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
82 tpm_tis_write8(priv
, TPM_ACCESS(l
), TPM_ACCESS_ACTIVE_LOCALITY
);
85 static int request_locality(struct tpm_chip
*chip
, int l
)
87 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
88 unsigned long stop
, timeout
;
91 if (check_locality(chip
, l
))
94 rc
= tpm_tis_write8(priv
, TPM_ACCESS(l
), TPM_ACCESS_REQUEST_USE
);
98 stop
= jiffies
+ chip
->timeout_a
;
100 if (chip
->flags
& TPM_CHIP_FLAG_IRQ
) {
102 timeout
= stop
- jiffies
;
103 if ((long)timeout
<= 0)
105 rc
= wait_event_interruptible_timeout(priv
->int_queue
,
111 if (rc
== -ERESTARTSYS
&& freezing(current
)) {
112 clear_thread_flag(TIF_SIGPENDING
);
116 /* wait for burstcount */
118 if (check_locality(chip
, l
))
121 } while (time_before(jiffies
, stop
));
126 static u8
tpm_tis_status(struct tpm_chip
*chip
)
128 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
132 rc
= tpm_tis_read8(priv
, TPM_STS(priv
->locality
), &status
);
139 static void tpm_tis_ready(struct tpm_chip
*chip
)
141 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
143 /* this causes the current command to be aborted */
144 tpm_tis_write8(priv
, TPM_STS(priv
->locality
), TPM_STS_COMMAND_READY
);
147 static int get_burstcount(struct tpm_chip
*chip
)
149 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
154 /* wait for burstcount */
155 if (chip
->flags
& TPM_CHIP_FLAG_TPM2
)
156 stop
= jiffies
+ chip
->timeout_a
;
158 stop
= jiffies
+ chip
->timeout_d
;
160 rc
= tpm_tis_read32(priv
, TPM_STS(priv
->locality
), &value
);
164 burstcnt
= (value
>> 8) & 0xFFFF;
168 } while (time_before(jiffies
, stop
));
172 static int recv_data(struct tpm_chip
*chip
, u8
*buf
, size_t count
)
174 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
175 int size
= 0, burstcnt
, rc
;
177 while (size
< count
) {
178 rc
= wait_for_tpm_stat(chip
,
179 TPM_STS_DATA_AVAIL
| TPM_STS_VALID
,
181 &priv
->read_queue
, true);
184 burstcnt
= get_burstcount(chip
);
186 dev_err(&chip
->dev
, "Unable to read burstcount\n");
189 burstcnt
= min_t(int, burstcnt
, count
- size
);
191 rc
= tpm_tis_read_bytes(priv
, TPM_DATA_FIFO(priv
->locality
),
192 burstcnt
, buf
+ size
);
201 static int tpm_tis_recv(struct tpm_chip
*chip
, u8
*buf
, size_t count
)
203 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
205 int expected
, status
;
207 if (count
< TPM_HEADER_SIZE
) {
212 size
= recv_data(chip
, buf
, TPM_HEADER_SIZE
);
213 /* read first 10 bytes, including tag, paramsize, and result */
214 if (size
< TPM_HEADER_SIZE
) {
215 dev_err(&chip
->dev
, "Unable to read header\n");
219 expected
= be32_to_cpu(*(__be32
*) (buf
+ 2));
220 if (expected
> count
) {
225 size
+= recv_data(chip
, &buf
[TPM_HEADER_SIZE
],
226 expected
- TPM_HEADER_SIZE
);
227 if (size
< expected
) {
228 dev_err(&chip
->dev
, "Unable to read remainder of result\n");
233 if (wait_for_tpm_stat(chip
, TPM_STS_VALID
, chip
->timeout_c
,
234 &priv
->int_queue
, false) < 0) {
238 status
= tpm_tis_status(chip
);
239 if (status
& TPM_STS_DATA_AVAIL
) { /* retry? */
240 dev_err(&chip
->dev
, "Error left over data\n");
251 * If interrupts are used (signaled by an irq set in the vendor structure)
252 * tpm.c can skip polling for the data to be available as the interrupt is
255 static int tpm_tis_send_data(struct tpm_chip
*chip
, u8
*buf
, size_t len
)
257 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
258 int rc
, status
, burstcnt
;
260 bool itpm
= priv
->flags
& TPM_TIS_ITPM_WORKAROUND
;
262 status
= tpm_tis_status(chip
);
263 if ((status
& TPM_STS_COMMAND_READY
) == 0) {
265 if (wait_for_tpm_stat
266 (chip
, TPM_STS_COMMAND_READY
, chip
->timeout_b
,
267 &priv
->int_queue
, false) < 0) {
273 while (count
< len
- 1) {
274 burstcnt
= get_burstcount(chip
);
276 dev_err(&chip
->dev
, "Unable to read burstcount\n");
280 burstcnt
= min_t(int, burstcnt
, len
- count
- 1);
281 rc
= tpm_tis_write_bytes(priv
, TPM_DATA_FIFO(priv
->locality
),
282 burstcnt
, buf
+ count
);
288 if (wait_for_tpm_stat(chip
, TPM_STS_VALID
, chip
->timeout_c
,
289 &priv
->int_queue
, false) < 0) {
293 status
= tpm_tis_status(chip
);
294 if (!itpm
&& (status
& TPM_STS_DATA_EXPECT
) == 0) {
300 /* write last byte */
301 rc
= tpm_tis_write8(priv
, TPM_DATA_FIFO(priv
->locality
), buf
[count
]);
305 if (wait_for_tpm_stat(chip
, TPM_STS_VALID
, chip
->timeout_c
,
306 &priv
->int_queue
, false) < 0) {
310 status
= tpm_tis_status(chip
);
311 if (!itpm
&& (status
& TPM_STS_DATA_EXPECT
) != 0) {
323 static void disable_interrupts(struct tpm_chip
*chip
)
325 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
329 rc
= tpm_tis_read32(priv
, TPM_INT_ENABLE(priv
->locality
), &intmask
);
333 intmask
&= ~TPM_GLOBAL_INT_ENABLE
;
334 rc
= tpm_tis_write32(priv
, TPM_INT_ENABLE(priv
->locality
), intmask
);
336 devm_free_irq(chip
->dev
.parent
, priv
->irq
, chip
);
338 chip
->flags
&= ~TPM_CHIP_FLAG_IRQ
;
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_main(struct tpm_chip
*chip
, u8
*buf
, size_t len
)
348 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
353 rc
= tpm_tis_send_data(chip
, buf
, len
);
358 rc
= tpm_tis_write8(priv
, TPM_STS(priv
->locality
), TPM_STS_GO
);
362 if (chip
->flags
& TPM_CHIP_FLAG_IRQ
) {
363 ordinal
= be32_to_cpu(*((__be32
*) (buf
+ 6)));
365 if (chip
->flags
& TPM_CHIP_FLAG_TPM2
)
366 dur
= tpm2_calc_ordinal_duration(chip
, ordinal
);
368 dur
= tpm_calc_ordinal_duration(chip
, ordinal
);
370 if (wait_for_tpm_stat
371 (chip
, TPM_STS_DATA_AVAIL
| TPM_STS_VALID
, dur
,
372 &priv
->read_queue
, false) < 0) {
383 static int tpm_tis_send(struct tpm_chip
*chip
, u8
*buf
, size_t len
)
386 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
388 if (!(chip
->flags
& TPM_CHIP_FLAG_IRQ
) || priv
->irq_tested
)
389 return tpm_tis_send_main(chip
, buf
, len
);
391 /* Verify receipt of the expected IRQ */
394 chip
->flags
&= ~TPM_CHIP_FLAG_IRQ
;
395 rc
= tpm_tis_send_main(chip
, buf
, len
);
397 chip
->flags
|= TPM_CHIP_FLAG_IRQ
;
398 if (!priv
->irq_tested
)
400 if (!priv
->irq_tested
)
401 disable_interrupts(chip
);
402 priv
->irq_tested
= true;
406 struct tis_vendor_timeout_override
{
408 unsigned long timeout_us
[4];
411 static const struct tis_vendor_timeout_override vendor_timeout_overrides
[] = {
413 { 0x32041114, { (TIS_SHORT_TIMEOUT
*1000), (TIS_LONG_TIMEOUT
*1000),
414 (TIS_SHORT_TIMEOUT
*1000), (TIS_SHORT_TIMEOUT
*1000) } },
417 static bool tpm_tis_update_timeouts(struct tpm_chip
*chip
,
418 unsigned long *timeout_cap
)
420 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
424 rc
= tpm_tis_read32(priv
, TPM_DID_VID(0), &did_vid
);
428 for (i
= 0; i
!= ARRAY_SIZE(vendor_timeout_overrides
); i
++) {
429 if (vendor_timeout_overrides
[i
].did_vid
!= did_vid
)
431 memcpy(timeout_cap
, vendor_timeout_overrides
[i
].timeout_us
,
432 sizeof(vendor_timeout_overrides
[i
].timeout_us
));
440 * Early probing for iTPM with STS_DATA_EXPECT flaw.
441 * Try sending command without itpm flag set and if that
442 * fails, repeat with itpm flag set.
444 static int probe_itpm(struct tpm_chip
*chip
)
446 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
448 u8 cmd_getticks
[] = {
449 0x00, 0xc1, 0x00, 0x00, 0x00, 0x0a,
450 0x00, 0x00, 0x00, 0xf1
452 size_t len
= sizeof(cmd_getticks
);
455 if (priv
->flags
& TPM_TIS_ITPM_WORKAROUND
)
458 rc
= tpm_tis_read16(priv
, TPM_DID_VID(0), &vendor
);
462 /* probe only iTPMS */
463 if (vendor
!= TPM_VID_INTEL
)
466 if (request_locality(chip
, 0) != 0)
469 rc
= tpm_tis_send_data(chip
, cmd_getticks
, len
);
475 priv
->flags
|= TPM_TIS_ITPM_WORKAROUND
;
477 rc
= tpm_tis_send_data(chip
, cmd_getticks
, len
);
479 dev_info(&chip
->dev
, "Detected an iTPM.\n");
481 priv
->flags
&= ~TPM_TIS_ITPM_WORKAROUND
;
487 release_locality(chip
, priv
->locality
);
492 static bool tpm_tis_req_canceled(struct tpm_chip
*chip
, u8 status
)
494 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
496 switch (priv
->manufacturer_id
) {
497 case TPM_VID_WINBOND
:
498 return ((status
== TPM_STS_VALID
) ||
499 (status
== (TPM_STS_VALID
| TPM_STS_COMMAND_READY
)));
501 return (status
== (TPM_STS_VALID
| TPM_STS_COMMAND_READY
));
503 return (status
== TPM_STS_COMMAND_READY
);
507 static irqreturn_t
tis_int_handler(int dummy
, void *dev_id
)
509 struct tpm_chip
*chip
= dev_id
;
510 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
514 rc
= tpm_tis_read32(priv
, TPM_INT_STATUS(priv
->locality
), &interrupt
);
521 priv
->irq_tested
= true;
522 if (interrupt
& TPM_INTF_DATA_AVAIL_INT
)
523 wake_up_interruptible(&priv
->read_queue
);
524 if (interrupt
& TPM_INTF_LOCALITY_CHANGE_INT
)
525 for (i
= 0; i
< 5; i
++)
526 if (check_locality(chip
, i
))
529 (TPM_INTF_LOCALITY_CHANGE_INT
| TPM_INTF_STS_VALID_INT
|
530 TPM_INTF_CMD_READY_INT
))
531 wake_up_interruptible(&priv
->int_queue
);
533 /* Clear interrupts handled with TPM_EOI */
534 rc
= tpm_tis_write32(priv
, TPM_INT_STATUS(priv
->locality
), interrupt
);
538 tpm_tis_read32(priv
, TPM_INT_STATUS(priv
->locality
), &interrupt
);
542 static int tpm_tis_gen_interrupt(struct tpm_chip
*chip
)
544 const char *desc
= "attempting to generate an interrupt";
548 if (chip
->flags
& TPM_CHIP_FLAG_TPM2
)
549 return tpm2_get_tpm_pt(chip
, 0x100, &cap2
, desc
);
551 return tpm_getcap(chip
, TPM_CAP_PROP_TIS_TIMEOUT
, &cap
, desc
,
555 /* Register the IRQ and issue a command that will cause an interrupt. If an
556 * irq is seen then leave the chip setup for IRQ operation, otherwise reverse
557 * everything and leave in polling mode. Returns 0 on success.
559 static int tpm_tis_probe_irq_single(struct tpm_chip
*chip
, u32 intmask
,
562 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
567 if (devm_request_irq(chip
->dev
.parent
, irq
, tis_int_handler
, flags
,
568 dev_name(&chip
->dev
), chip
) != 0) {
569 dev_info(&chip
->dev
, "Unable to request irq: %d for probe\n",
575 rc
= tpm_tis_read8(priv
, TPM_INT_VECTOR(priv
->locality
),
580 rc
= tpm_tis_write8(priv
, TPM_INT_VECTOR(priv
->locality
), irq
);
584 rc
= tpm_tis_read32(priv
, TPM_INT_STATUS(priv
->locality
), &int_status
);
588 /* Clear all existing */
589 rc
= tpm_tis_write32(priv
, TPM_INT_STATUS(priv
->locality
), int_status
);
594 rc
= tpm_tis_write32(priv
, TPM_INT_ENABLE(priv
->locality
),
595 intmask
| TPM_GLOBAL_INT_ENABLE
);
599 priv
->irq_tested
= false;
601 /* Generate an interrupt by having the core call through to
604 rc
= tpm_tis_gen_interrupt(chip
);
608 /* tpm_tis_send will either confirm the interrupt is working or it
609 * will call disable_irq which undoes all of the above.
611 if (!(chip
->flags
& TPM_CHIP_FLAG_IRQ
)) {
612 rc
= tpm_tis_write8(priv
, original_int_vec
,
613 TPM_INT_VECTOR(priv
->locality
));
623 /* Try to find the IRQ the TPM is using. This is for legacy x86 systems that
624 * do not have ACPI/etc. We typically expect the interrupt to be declared if
627 static void tpm_tis_probe_irq(struct tpm_chip
*chip
, u32 intmask
)
629 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
633 rc
= tpm_tis_read8(priv
, TPM_INT_VECTOR(priv
->locality
),
638 if (!original_int_vec
) {
639 if (IS_ENABLED(CONFIG_X86
))
640 for (i
= 3; i
<= 15; i
++)
641 if (!tpm_tis_probe_irq_single(chip
, intmask
, 0,
644 } else if (!tpm_tis_probe_irq_single(chip
, intmask
, 0,
649 void tpm_tis_remove(struct tpm_chip
*chip
)
651 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
652 u32 reg
= TPM_INT_ENABLE(priv
->locality
);
656 rc
= tpm_tis_read32(priv
, reg
, &interrupt
);
660 tpm_tis_write32(priv
, reg
, ~TPM_GLOBAL_INT_ENABLE
& interrupt
);
662 EXPORT_SYMBOL_GPL(tpm_tis_remove
);
664 static const struct tpm_class_ops tpm_tis
= {
665 .flags
= TPM_OPS_AUTO_STARTUP
,
666 .status
= tpm_tis_status
,
667 .recv
= tpm_tis_recv
,
668 .send
= tpm_tis_send
,
669 .cancel
= tpm_tis_ready
,
670 .update_timeouts
= tpm_tis_update_timeouts
,
671 .req_complete_mask
= TPM_STS_DATA_AVAIL
| TPM_STS_VALID
,
672 .req_complete_val
= TPM_STS_DATA_AVAIL
| TPM_STS_VALID
,
673 .req_canceled
= tpm_tis_req_canceled
,
674 .request_locality
= request_locality
,
675 .relinquish_locality
= release_locality
,
678 int tpm_tis_core_init(struct device
*dev
, struct tpm_tis_data
*priv
, int irq
,
679 const struct tpm_tis_phy_ops
*phy_ops
,
680 acpi_handle acpi_dev_handle
)
682 u32 vendor
, intfcaps
, intmask
;
685 struct tpm_chip
*chip
;
687 chip
= tpmm_chip_alloc(dev
, &tpm_tis
);
689 return PTR_ERR(chip
);
692 chip
->acpi_dev_handle
= acpi_dev_handle
;
695 /* Maximum timeouts */
696 chip
->timeout_a
= msecs_to_jiffies(TIS_TIMEOUT_A_MAX
);
697 chip
->timeout_b
= msecs_to_jiffies(TIS_TIMEOUT_B_MAX
);
698 chip
->timeout_c
= msecs_to_jiffies(TIS_TIMEOUT_C_MAX
);
699 chip
->timeout_d
= msecs_to_jiffies(TIS_TIMEOUT_D_MAX
);
700 priv
->phy_ops
= phy_ops
;
701 dev_set_drvdata(&chip
->dev
, priv
);
703 if (wait_startup(chip
, 0) != 0) {
708 /* Take control of the TPM's interrupt hardware and shut it off */
709 rc
= tpm_tis_read32(priv
, TPM_INT_ENABLE(priv
->locality
), &intmask
);
713 intmask
|= TPM_INTF_CMD_READY_INT
| TPM_INTF_LOCALITY_CHANGE_INT
|
714 TPM_INTF_DATA_AVAIL_INT
| TPM_INTF_STS_VALID_INT
;
715 intmask
&= ~TPM_GLOBAL_INT_ENABLE
;
716 tpm_tis_write32(priv
, TPM_INT_ENABLE(priv
->locality
), intmask
);
718 rc
= tpm2_probe(chip
);
722 rc
= tpm_tis_read32(priv
, TPM_DID_VID(0), &vendor
);
726 priv
->manufacturer_id
= vendor
;
728 rc
= tpm_tis_read8(priv
, TPM_RID(0), &rid
);
732 dev_info(dev
, "%s TPM (device-id 0x%X, rev-id %d)\n",
733 (chip
->flags
& TPM_CHIP_FLAG_TPM2
) ? "2.0" : "1.2",
736 probe
= probe_itpm(chip
);
742 /* Figure out the capabilities */
743 rc
= tpm_tis_read32(priv
, TPM_INTF_CAPS(priv
->locality
), &intfcaps
);
747 dev_dbg(dev
, "TPM interface capabilities (0x%x):\n",
749 if (intfcaps
& TPM_INTF_BURST_COUNT_STATIC
)
750 dev_dbg(dev
, "\tBurst Count Static\n");
751 if (intfcaps
& TPM_INTF_CMD_READY_INT
)
752 dev_dbg(dev
, "\tCommand Ready Int Support\n");
753 if (intfcaps
& TPM_INTF_INT_EDGE_FALLING
)
754 dev_dbg(dev
, "\tInterrupt Edge Falling\n");
755 if (intfcaps
& TPM_INTF_INT_EDGE_RISING
)
756 dev_dbg(dev
, "\tInterrupt Edge Rising\n");
757 if (intfcaps
& TPM_INTF_INT_LEVEL_LOW
)
758 dev_dbg(dev
, "\tInterrupt Level Low\n");
759 if (intfcaps
& TPM_INTF_INT_LEVEL_HIGH
)
760 dev_dbg(dev
, "\tInterrupt Level High\n");
761 if (intfcaps
& TPM_INTF_LOCALITY_CHANGE_INT
)
762 dev_dbg(dev
, "\tLocality Change Int Support\n");
763 if (intfcaps
& TPM_INTF_STS_VALID_INT
)
764 dev_dbg(dev
, "\tSts Valid Int Support\n");
765 if (intfcaps
& TPM_INTF_DATA_AVAIL_INT
)
766 dev_dbg(dev
, "\tData Avail Int Support\n");
768 /* INTERRUPT Setup */
769 init_waitqueue_head(&priv
->read_queue
);
770 init_waitqueue_head(&priv
->int_queue
);
772 /* Before doing irq testing issue a command to the TPM in polling mode
773 * to make sure it works. May as well use that command to set the
774 * proper timeouts for the driver.
776 if (tpm_get_timeouts(chip
)) {
777 dev_err(dev
, "Could not get TPM timeouts and durations\n");
783 tpm_tis_probe_irq_single(chip
, intmask
, IRQF_SHARED
,
785 if (!(chip
->flags
& TPM_CHIP_FLAG_IRQ
))
786 dev_err(&chip
->dev
, FW_BUG
787 "TPM interrupt not working, polling instead\n");
789 tpm_tis_probe_irq(chip
, intmask
);
793 return tpm_chip_register(chip
);
795 tpm_tis_remove(chip
);
798 EXPORT_SYMBOL_GPL(tpm_tis_core_init
);
800 #ifdef CONFIG_PM_SLEEP
801 static void tpm_tis_reenable_interrupts(struct tpm_chip
*chip
)
803 struct tpm_tis_data
*priv
= dev_get_drvdata(&chip
->dev
);
807 /* reenable interrupts that device may have lost or
808 * BIOS/firmware may have disabled
810 rc
= tpm_tis_write8(priv
, TPM_INT_VECTOR(priv
->locality
), priv
->irq
);
814 rc
= tpm_tis_read32(priv
, TPM_INT_ENABLE(priv
->locality
), &intmask
);
818 intmask
|= TPM_INTF_CMD_READY_INT
819 | TPM_INTF_LOCALITY_CHANGE_INT
| TPM_INTF_DATA_AVAIL_INT
820 | TPM_INTF_STS_VALID_INT
| TPM_GLOBAL_INT_ENABLE
;
822 tpm_tis_write32(priv
, TPM_INT_ENABLE(priv
->locality
), intmask
);
825 int tpm_tis_resume(struct device
*dev
)
827 struct tpm_chip
*chip
= dev_get_drvdata(dev
);
830 if (chip
->flags
& TPM_CHIP_FLAG_IRQ
)
831 tpm_tis_reenable_interrupts(chip
);
833 ret
= tpm_pm_resume(dev
);
837 /* TPM 1.2 requires self-test on resume. This function actually returns
838 * an error code but for unknown reason it isn't handled.
840 if (!(chip
->flags
& TPM_CHIP_FLAG_TPM2
))
841 tpm_do_selftest(chip
);
845 EXPORT_SYMBOL_GPL(tpm_tis_resume
);
848 MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
849 MODULE_DESCRIPTION("TPM Driver");
850 MODULE_VERSION("2.0");
851 MODULE_LICENSE("GPL");