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 file_operations tis_ops
= {
466 .owner
= THIS_MODULE
,
471 .release
= tpm_release
,
474 static DEVICE_ATTR(pubek
, S_IRUGO
, tpm_show_pubek
, NULL
);
475 static DEVICE_ATTR(pcrs
, S_IRUGO
, tpm_show_pcrs
, NULL
);
476 static DEVICE_ATTR(enabled
, S_IRUGO
, tpm_show_enabled
, NULL
);
477 static DEVICE_ATTR(active
, S_IRUGO
, tpm_show_active
, NULL
);
478 static DEVICE_ATTR(owned
, S_IRUGO
, tpm_show_owned
, NULL
);
479 static DEVICE_ATTR(temp_deactivated
, S_IRUGO
, tpm_show_temp_deactivated
,
481 static DEVICE_ATTR(caps
, S_IRUGO
, tpm_show_caps_1_2
, NULL
);
482 static DEVICE_ATTR(cancel
, S_IWUSR
| S_IWGRP
, NULL
, tpm_store_cancel
);
483 static DEVICE_ATTR(durations
, S_IRUGO
, tpm_show_durations
, NULL
);
484 static DEVICE_ATTR(timeouts
, S_IRUGO
, tpm_show_timeouts
, NULL
);
486 static struct attribute
*tis_attrs
[] = {
487 &dev_attr_pubek
.attr
,
489 &dev_attr_enabled
.attr
,
490 &dev_attr_active
.attr
,
491 &dev_attr_owned
.attr
,
492 &dev_attr_temp_deactivated
.attr
,
494 &dev_attr_cancel
.attr
,
495 &dev_attr_durations
.attr
,
496 &dev_attr_timeouts
.attr
, NULL
,
499 static struct attribute_group tis_attr_grp
= {
503 static struct tpm_vendor_specific tpm_tis
= {
504 .status
= tpm_tis_status
,
505 .recv
= tpm_tis_recv
,
506 .send
= tpm_tis_send
,
507 .cancel
= tpm_tis_ready
,
508 .update_timeouts
= tpm_tis_update_timeouts
,
509 .req_complete_mask
= TPM_STS_DATA_AVAIL
| TPM_STS_VALID
,
510 .req_complete_val
= TPM_STS_DATA_AVAIL
| TPM_STS_VALID
,
511 .req_canceled
= tpm_tis_req_canceled
,
512 .attr_group
= &tis_attr_grp
,
517 static irqreturn_t
tis_int_probe(int irq
, void *dev_id
)
519 struct tpm_chip
*chip
= dev_id
;
522 interrupt
= ioread32(chip
->vendor
.iobase
+
523 TPM_INT_STATUS(chip
->vendor
.locality
));
528 chip
->vendor
.probed_irq
= irq
;
530 /* Clear interrupts handled with TPM_EOI */
532 chip
->vendor
.iobase
+
533 TPM_INT_STATUS(chip
->vendor
.locality
));
537 static irqreturn_t
tis_int_handler(int dummy
, void *dev_id
)
539 struct tpm_chip
*chip
= dev_id
;
543 interrupt
= ioread32(chip
->vendor
.iobase
+
544 TPM_INT_STATUS(chip
->vendor
.locality
));
549 if (interrupt
& TPM_INTF_DATA_AVAIL_INT
)
550 wake_up_interruptible(&chip
->vendor
.read_queue
);
551 if (interrupt
& TPM_INTF_LOCALITY_CHANGE_INT
)
552 for (i
= 0; i
< 5; i
++)
553 if (check_locality(chip
, i
) >= 0)
556 (TPM_INTF_LOCALITY_CHANGE_INT
| TPM_INTF_STS_VALID_INT
|
557 TPM_INTF_CMD_READY_INT
))
558 wake_up_interruptible(&chip
->vendor
.int_queue
);
560 /* Clear interrupts handled with TPM_EOI */
562 chip
->vendor
.iobase
+
563 TPM_INT_STATUS(chip
->vendor
.locality
));
564 ioread32(chip
->vendor
.iobase
+ TPM_INT_STATUS(chip
->vendor
.locality
));
568 static bool interrupts
= true;
569 module_param(interrupts
, bool, 0444);
570 MODULE_PARM_DESC(interrupts
, "Enable interrupts");
572 static int tpm_tis_init(struct device
*dev
, resource_size_t start
,
573 resource_size_t len
, unsigned int irq
)
575 u32 vendor
, intfcaps
, intmask
;
576 int rc
, i
, irq_s
, irq_e
, probe
;
577 struct tpm_chip
*chip
;
579 if (!(chip
= tpm_register_hardware(dev
, &tpm_tis
)))
582 chip
->vendor
.iobase
= ioremap(start
, len
);
583 if (!chip
->vendor
.iobase
) {
588 /* Default timeouts */
589 chip
->vendor
.timeout_a
= msecs_to_jiffies(TIS_SHORT_TIMEOUT
);
590 chip
->vendor
.timeout_b
= msecs_to_jiffies(TIS_LONG_TIMEOUT
);
591 chip
->vendor
.timeout_c
= msecs_to_jiffies(TIS_SHORT_TIMEOUT
);
592 chip
->vendor
.timeout_d
= msecs_to_jiffies(TIS_SHORT_TIMEOUT
);
594 if (wait_startup(chip
, 0) != 0) {
599 if (request_locality(chip
, 0) != 0) {
604 vendor
= ioread32(chip
->vendor
.iobase
+ TPM_DID_VID(0));
605 chip
->vendor
.manufacturer_id
= vendor
;
608 "1.2 TPM (device-id 0x%X, rev-id %d)\n",
609 vendor
>> 16, ioread8(chip
->vendor
.iobase
+ TPM_RID(0)));
612 probe
= probe_itpm(chip
);
621 dev_info(dev
, "Intel iTPM workaround enabled\n");
624 /* Figure out the capabilities */
626 ioread32(chip
->vendor
.iobase
+
627 TPM_INTF_CAPS(chip
->vendor
.locality
));
628 dev_dbg(dev
, "TPM interface capabilities (0x%x):\n",
630 if (intfcaps
& TPM_INTF_BURST_COUNT_STATIC
)
631 dev_dbg(dev
, "\tBurst Count Static\n");
632 if (intfcaps
& TPM_INTF_CMD_READY_INT
)
633 dev_dbg(dev
, "\tCommand Ready Int Support\n");
634 if (intfcaps
& TPM_INTF_INT_EDGE_FALLING
)
635 dev_dbg(dev
, "\tInterrupt Edge Falling\n");
636 if (intfcaps
& TPM_INTF_INT_EDGE_RISING
)
637 dev_dbg(dev
, "\tInterrupt Edge Rising\n");
638 if (intfcaps
& TPM_INTF_INT_LEVEL_LOW
)
639 dev_dbg(dev
, "\tInterrupt Level Low\n");
640 if (intfcaps
& TPM_INTF_INT_LEVEL_HIGH
)
641 dev_dbg(dev
, "\tInterrupt Level High\n");
642 if (intfcaps
& TPM_INTF_LOCALITY_CHANGE_INT
)
643 dev_dbg(dev
, "\tLocality Change Int Support\n");
644 if (intfcaps
& TPM_INTF_STS_VALID_INT
)
645 dev_dbg(dev
, "\tSts Valid Int Support\n");
646 if (intfcaps
& TPM_INTF_DATA_AVAIL_INT
)
647 dev_dbg(dev
, "\tData Avail Int Support\n");
649 /* get the timeouts before testing for irqs */
650 if (tpm_get_timeouts(chip
)) {
651 dev_err(dev
, "Could not get TPM timeouts and durations\n");
656 if (tpm_do_selftest(chip
)) {
657 dev_err(dev
, "TPM self test failed\n");
662 /* INTERRUPT Setup */
663 init_waitqueue_head(&chip
->vendor
.read_queue
);
664 init_waitqueue_head(&chip
->vendor
.int_queue
);
667 ioread32(chip
->vendor
.iobase
+
668 TPM_INT_ENABLE(chip
->vendor
.locality
));
670 intmask
|= TPM_INTF_CMD_READY_INT
671 | TPM_INTF_LOCALITY_CHANGE_INT
| TPM_INTF_DATA_AVAIL_INT
672 | TPM_INTF_STS_VALID_INT
;
675 chip
->vendor
.iobase
+
676 TPM_INT_ENABLE(chip
->vendor
.locality
));
678 chip
->vendor
.irq
= irq
;
679 if (interrupts
&& !chip
->vendor
.irq
) {
681 ioread8(chip
->vendor
.iobase
+
682 TPM_INT_VECTOR(chip
->vendor
.locality
));
690 for (i
= irq_s
; i
<= irq_e
&& chip
->vendor
.irq
== 0; i
++) {
691 iowrite8(i
, chip
->vendor
.iobase
+
692 TPM_INT_VECTOR(chip
->vendor
.locality
));
694 (i
, tis_int_probe
, IRQF_SHARED
,
695 chip
->vendor
.miscdev
.name
, chip
) != 0) {
697 "Unable to request irq: %d for probe\n",
702 /* Clear all existing */
704 (chip
->vendor
.iobase
+
705 TPM_INT_STATUS(chip
->vendor
.locality
)),
706 chip
->vendor
.iobase
+
707 TPM_INT_STATUS(chip
->vendor
.locality
));
710 iowrite32(intmask
| TPM_GLOBAL_INT_ENABLE
,
711 chip
->vendor
.iobase
+
712 TPM_INT_ENABLE(chip
->vendor
.locality
));
714 chip
->vendor
.probed_irq
= 0;
716 /* Generate Interrupts */
717 tpm_gen_interrupt(chip
);
719 chip
->vendor
.irq
= chip
->vendor
.probed_irq
;
721 /* free_irq will call into tis_int_probe;
722 clear all irqs we haven't seen while doing
725 (chip
->vendor
.iobase
+
726 TPM_INT_STATUS(chip
->vendor
.locality
)),
727 chip
->vendor
.iobase
+
728 TPM_INT_STATUS(chip
->vendor
.locality
));
732 chip
->vendor
.iobase
+
733 TPM_INT_ENABLE(chip
->vendor
.locality
));
737 if (chip
->vendor
.irq
) {
738 iowrite8(chip
->vendor
.irq
,
739 chip
->vendor
.iobase
+
740 TPM_INT_VECTOR(chip
->vendor
.locality
));
742 (chip
->vendor
.irq
, tis_int_handler
, IRQF_SHARED
,
743 chip
->vendor
.miscdev
.name
, chip
) != 0) {
745 "Unable to request irq: %d for use\n",
747 chip
->vendor
.irq
= 0;
749 /* Clear all existing */
751 (chip
->vendor
.iobase
+
752 TPM_INT_STATUS(chip
->vendor
.locality
)),
753 chip
->vendor
.iobase
+
754 TPM_INT_STATUS(chip
->vendor
.locality
));
757 iowrite32(intmask
| TPM_GLOBAL_INT_ENABLE
,
758 chip
->vendor
.iobase
+
759 TPM_INT_ENABLE(chip
->vendor
.locality
));
763 INIT_LIST_HEAD(&chip
->vendor
.list
);
764 mutex_lock(&tis_lock
);
765 list_add(&chip
->vendor
.list
, &tis_chips
);
766 mutex_unlock(&tis_lock
);
771 if (chip
->vendor
.iobase
)
772 iounmap(chip
->vendor
.iobase
);
773 tpm_remove_hardware(chip
->dev
);
777 #if defined(CONFIG_PNP) || defined(CONFIG_PM_SLEEP)
778 static void tpm_tis_reenable_interrupts(struct tpm_chip
*chip
)
782 /* reenable interrupts that device may have lost or
783 BIOS/firmware may have disabled */
784 iowrite8(chip
->vendor
.irq
, chip
->vendor
.iobase
+
785 TPM_INT_VECTOR(chip
->vendor
.locality
));
788 ioread32(chip
->vendor
.iobase
+
789 TPM_INT_ENABLE(chip
->vendor
.locality
));
791 intmask
|= TPM_INTF_CMD_READY_INT
792 | TPM_INTF_LOCALITY_CHANGE_INT
| TPM_INTF_DATA_AVAIL_INT
793 | TPM_INTF_STS_VALID_INT
| TPM_GLOBAL_INT_ENABLE
;
796 chip
->vendor
.iobase
+ TPM_INT_ENABLE(chip
->vendor
.locality
));
801 static int tpm_tis_pnp_init(struct pnp_dev
*pnp_dev
,
802 const struct pnp_device_id
*pnp_id
)
804 resource_size_t start
, len
;
805 unsigned int irq
= 0;
807 start
= pnp_mem_start(pnp_dev
, 0);
808 len
= pnp_mem_len(pnp_dev
, 0);
810 if (pnp_irq_valid(pnp_dev
, 0))
811 irq
= pnp_irq(pnp_dev
, 0);
815 if (is_itpm(pnp_dev
))
818 return tpm_tis_init(&pnp_dev
->dev
, start
, len
, irq
);
821 static int tpm_tis_pnp_suspend(struct pnp_dev
*dev
, pm_message_t msg
)
823 return tpm_pm_suspend(&dev
->dev
);
826 static int tpm_tis_pnp_resume(struct pnp_dev
*dev
)
828 struct tpm_chip
*chip
= pnp_get_drvdata(dev
);
831 if (chip
->vendor
.irq
)
832 tpm_tis_reenable_interrupts(chip
);
834 ret
= tpm_pm_resume(&dev
->dev
);
836 tpm_do_selftest(chip
);
841 static struct pnp_device_id tpm_pnp_tbl
[] = {
842 {"PNP0C31", 0}, /* TPM */
843 {"ATM1200", 0}, /* Atmel */
844 {"IFX0102", 0}, /* Infineon */
845 {"BCM0101", 0}, /* Broadcom */
846 {"BCM0102", 0}, /* Broadcom */
847 {"NSC1200", 0}, /* National */
848 {"ICO0102", 0}, /* Intel */
850 {"", 0}, /* User Specified */
851 {"", 0} /* Terminator */
853 MODULE_DEVICE_TABLE(pnp
, tpm_pnp_tbl
);
855 static void tpm_tis_pnp_remove(struct pnp_dev
*dev
)
857 struct tpm_chip
*chip
= pnp_get_drvdata(dev
);
859 tpm_dev_vendor_release(chip
);
865 static struct pnp_driver tis_pnp_driver
= {
867 .id_table
= tpm_pnp_tbl
,
868 .probe
= tpm_tis_pnp_init
,
869 .suspend
= tpm_tis_pnp_suspend
,
870 .resume
= tpm_tis_pnp_resume
,
871 .remove
= tpm_tis_pnp_remove
,
874 #define TIS_HID_USR_IDX sizeof(tpm_pnp_tbl)/sizeof(struct pnp_device_id) -2
875 module_param_string(hid
, tpm_pnp_tbl
[TIS_HID_USR_IDX
].id
,
876 sizeof(tpm_pnp_tbl
[TIS_HID_USR_IDX
].id
), 0444);
877 MODULE_PARM_DESC(hid
, "Set additional specific HID for this driver to probe");
880 #ifdef CONFIG_PM_SLEEP
881 static int tpm_tis_resume(struct device
*dev
)
883 struct tpm_chip
*chip
= dev_get_drvdata(dev
);
885 if (chip
->vendor
.irq
)
886 tpm_tis_reenable_interrupts(chip
);
888 return tpm_pm_resume(dev
);
892 static SIMPLE_DEV_PM_OPS(tpm_tis_pm
, tpm_pm_suspend
, tpm_tis_resume
);
894 static struct platform_driver tis_drv
= {
897 .owner
= THIS_MODULE
,
902 static struct platform_device
*pdev
;
905 module_param(force
, bool, 0444);
906 MODULE_PARM_DESC(force
, "Force device probe rather than using ACPI entry");
907 static int __init
init_tis(void)
912 return pnp_register_driver(&tis_pnp_driver
);
915 rc
= platform_driver_register(&tis_drv
);
918 if (IS_ERR(pdev
=platform_device_register_simple("tpm_tis", -1, NULL
, 0)))
919 return PTR_ERR(pdev
);
920 if((rc
=tpm_tis_init(&pdev
->dev
, TIS_MEM_BASE
, TIS_MEM_LEN
, 0)) != 0) {
921 platform_device_unregister(pdev
);
922 platform_driver_unregister(&tis_drv
);
927 static void __exit
cleanup_tis(void)
929 struct tpm_vendor_specific
*i
, *j
;
930 struct tpm_chip
*chip
;
931 mutex_lock(&tis_lock
);
932 list_for_each_entry_safe(i
, j
, &tis_chips
, list
) {
933 chip
= to_tpm_chip(i
);
934 tpm_remove_hardware(chip
->dev
);
935 iowrite32(~TPM_GLOBAL_INT_ENABLE
&
936 ioread32(chip
->vendor
.iobase
+
937 TPM_INT_ENABLE(chip
->vendor
.
939 chip
->vendor
.iobase
+
940 TPM_INT_ENABLE(chip
->vendor
.locality
));
941 release_locality(chip
, chip
->vendor
.locality
, 1);
942 if (chip
->vendor
.irq
)
943 free_irq(chip
->vendor
.irq
, chip
);
947 mutex_unlock(&tis_lock
);
950 pnp_unregister_driver(&tis_pnp_driver
);
954 platform_device_unregister(pdev
);
955 platform_driver_unregister(&tis_drv
);
958 module_init(init_tis
);
959 module_exit(cleanup_tis
);
960 MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
961 MODULE_DESCRIPTION("TPM Driver");
962 MODULE_VERSION("2.0");
963 MODULE_LICENSE("GPL");