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");