blob: a650892f09ab6d4760910dbefd4b8336d3a01aa9 [file] [log] [blame]
Rong Chang8faa9452013-04-12 10:44:57 +00001/*
2 * Copyright (C) 2011 Infineon Technologies
3 *
4 * Authors:
5 * Peter Huewe <huewe.external@infineon.com>
6 *
7 * Description:
8 * Device driver for TCG/TCPA TPM (trusted platform module).
9 * Specifications at www.trustedcomputinggroup.org
10 *
11 * It is based on the Linux kernel driver tpm.c from Leendert van
12 * Dorn, Dave Safford, Reiner Sailer, and Kyleen Hall.
13 *
14 * Version: 2.1.1
15 *
16 * See file CREDITS for list of people who contributed to this
17 * project.
18 *
19 * This program is free software; you can redistribute it and/or
20 * modify it under the terms of the GNU General Public License as
21 * published by the Free Software Foundation, version 2 of the
22 * License.
23 *
24 * This program is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
28 *
29 * You should have received a copy of the GNU General Public License
30 * along with this program; if not, write to the Free Software
31 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
32 * MA 02111-1307 USA
33 */
34
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +000035#include <config.h>
36#include <common.h>
Simon Glassc9a3e842015-05-04 11:30:59 -060037#include <dm.h>
Masahiro Yamadae7228522014-11-26 16:00:58 +090038#include <linux/compiler.h>
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +000039#include <fdtdec.h>
40#include <i2c.h>
41#include <tpm.h>
42#include <asm-generic/errno.h>
43#include <linux/types.h>
44#include <linux/unaligned/be_byteshift.h>
Rong Chang8faa9452013-04-12 10:44:57 +000045
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +000046#include "tpm_private.h"
47
48DECLARE_GLOBAL_DATA_PTR;
49
50/* TPM configuration */
51struct tpm {
Simon Glassc9a3e842015-05-04 11:30:59 -060052#ifdef CONFIG_DM_I2C
53 struct udevice *dev;
54#else
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +000055 int i2c_bus;
56 int slave_addr;
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +000057 int old_bus;
Simon Glassc9a3e842015-05-04 11:30:59 -060058#endif
59 char inited;
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +000060} tpm;
61
62/* Global structure for tpm chip data */
63static struct tpm_chip g_chip;
Rong Chang8faa9452013-04-12 10:44:57 +000064
65enum tpm_duration {
66 TPM_SHORT = 0,
67 TPM_MEDIUM = 1,
68 TPM_LONG = 2,
69 TPM_UNDEFINED,
70};
71
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +000072/* Extended error numbers from linux (see errno.h) */
73#define ECANCELED 125 /* Operation Canceled */
74
75/* Timer frequency. Corresponds to msec timer resolution*/
76#define HZ 1000
77
78#define TPM_MAX_ORDINAL 243
79#define TPM_MAX_PROTECTED_ORDINAL 12
80#define TPM_PROTECTED_ORDINAL_MASK 0xFF
81
82#define TPM_CMD_COUNT_BYTE 2
83#define TPM_CMD_ORDINAL_BYTE 6
Rong Chang8faa9452013-04-12 10:44:57 +000084
85/*
86 * Array with one entry per ordinal defining the maximum amount
87 * of time the chip could take to return the result. The ordinal
88 * designation of short, medium or long is defined in a table in
89 * TCG Specification TPM Main Part 2 TPM Structures Section 17. The
90 * values of the SHORT, MEDIUM, and LONG durations are retrieved
91 * from the chip during initialization with a call to tpm_get_timeouts.
92 */
93static const u8 tpm_protected_ordinal_duration[TPM_MAX_PROTECTED_ORDINAL] = {
94 TPM_UNDEFINED, /* 0 */
95 TPM_UNDEFINED,
96 TPM_UNDEFINED,
97 TPM_UNDEFINED,
98 TPM_UNDEFINED,
99 TPM_UNDEFINED, /* 5 */
100 TPM_UNDEFINED,
101 TPM_UNDEFINED,
102 TPM_UNDEFINED,
103 TPM_UNDEFINED,
104 TPM_SHORT, /* 10 */
105 TPM_SHORT,
106};
107
108static const u8 tpm_ordinal_duration[TPM_MAX_ORDINAL] = {
109 TPM_UNDEFINED, /* 0 */
110 TPM_UNDEFINED,
111 TPM_UNDEFINED,
112 TPM_UNDEFINED,
113 TPM_UNDEFINED,
114 TPM_UNDEFINED, /* 5 */
115 TPM_UNDEFINED,
116 TPM_UNDEFINED,
117 TPM_UNDEFINED,
118 TPM_UNDEFINED,
119 TPM_SHORT, /* 10 */
120 TPM_SHORT,
121 TPM_MEDIUM,
122 TPM_LONG,
123 TPM_LONG,
124 TPM_MEDIUM, /* 15 */
125 TPM_SHORT,
126 TPM_SHORT,
127 TPM_MEDIUM,
128 TPM_LONG,
129 TPM_SHORT, /* 20 */
130 TPM_SHORT,
131 TPM_MEDIUM,
132 TPM_MEDIUM,
133 TPM_MEDIUM,
134 TPM_SHORT, /* 25 */
135 TPM_SHORT,
136 TPM_MEDIUM,
137 TPM_SHORT,
138 TPM_SHORT,
139 TPM_MEDIUM, /* 30 */
140 TPM_LONG,
141 TPM_MEDIUM,
142 TPM_SHORT,
143 TPM_SHORT,
144 TPM_SHORT, /* 35 */
145 TPM_MEDIUM,
146 TPM_MEDIUM,
147 TPM_UNDEFINED,
148 TPM_UNDEFINED,
149 TPM_MEDIUM, /* 40 */
150 TPM_LONG,
151 TPM_MEDIUM,
152 TPM_SHORT,
153 TPM_SHORT,
154 TPM_SHORT, /* 45 */
155 TPM_SHORT,
156 TPM_SHORT,
157 TPM_SHORT,
158 TPM_LONG,
159 TPM_MEDIUM, /* 50 */
160 TPM_MEDIUM,
161 TPM_UNDEFINED,
162 TPM_UNDEFINED,
163 TPM_UNDEFINED,
164 TPM_UNDEFINED, /* 55 */
165 TPM_UNDEFINED,
166 TPM_UNDEFINED,
167 TPM_UNDEFINED,
168 TPM_UNDEFINED,
169 TPM_MEDIUM, /* 60 */
170 TPM_MEDIUM,
171 TPM_MEDIUM,
172 TPM_SHORT,
173 TPM_SHORT,
174 TPM_MEDIUM, /* 65 */
175 TPM_UNDEFINED,
176 TPM_UNDEFINED,
177 TPM_UNDEFINED,
178 TPM_UNDEFINED,
179 TPM_SHORT, /* 70 */
180 TPM_SHORT,
181 TPM_UNDEFINED,
182 TPM_UNDEFINED,
183 TPM_UNDEFINED,
184 TPM_UNDEFINED, /* 75 */
185 TPM_UNDEFINED,
186 TPM_UNDEFINED,
187 TPM_UNDEFINED,
188 TPM_UNDEFINED,
189 TPM_LONG, /* 80 */
190 TPM_UNDEFINED,
191 TPM_MEDIUM,
192 TPM_LONG,
193 TPM_SHORT,
194 TPM_UNDEFINED, /* 85 */
195 TPM_UNDEFINED,
196 TPM_UNDEFINED,
197 TPM_UNDEFINED,
198 TPM_UNDEFINED,
199 TPM_SHORT, /* 90 */
200 TPM_SHORT,
201 TPM_SHORT,
202 TPM_SHORT,
203 TPM_SHORT,
204 TPM_UNDEFINED, /* 95 */
205 TPM_UNDEFINED,
206 TPM_UNDEFINED,
207 TPM_UNDEFINED,
208 TPM_UNDEFINED,
209 TPM_MEDIUM, /* 100 */
210 TPM_SHORT,
211 TPM_SHORT,
212 TPM_UNDEFINED,
213 TPM_UNDEFINED,
214 TPM_UNDEFINED, /* 105 */
215 TPM_UNDEFINED,
216 TPM_UNDEFINED,
217 TPM_UNDEFINED,
218 TPM_UNDEFINED,
219 TPM_SHORT, /* 110 */
220 TPM_SHORT,
221 TPM_SHORT,
222 TPM_SHORT,
223 TPM_SHORT,
224 TPM_SHORT, /* 115 */
225 TPM_SHORT,
226 TPM_SHORT,
227 TPM_UNDEFINED,
228 TPM_UNDEFINED,
229 TPM_LONG, /* 120 */
230 TPM_LONG,
231 TPM_MEDIUM,
232 TPM_UNDEFINED,
233 TPM_SHORT,
234 TPM_SHORT, /* 125 */
235 TPM_SHORT,
236 TPM_LONG,
237 TPM_SHORT,
238 TPM_SHORT,
239 TPM_SHORT, /* 130 */
240 TPM_MEDIUM,
241 TPM_UNDEFINED,
242 TPM_SHORT,
243 TPM_MEDIUM,
244 TPM_UNDEFINED, /* 135 */
245 TPM_UNDEFINED,
246 TPM_UNDEFINED,
247 TPM_UNDEFINED,
248 TPM_UNDEFINED,
249 TPM_SHORT, /* 140 */
250 TPM_SHORT,
251 TPM_UNDEFINED,
252 TPM_UNDEFINED,
253 TPM_UNDEFINED,
254 TPM_UNDEFINED, /* 145 */
255 TPM_UNDEFINED,
256 TPM_UNDEFINED,
257 TPM_UNDEFINED,
258 TPM_UNDEFINED,
259 TPM_SHORT, /* 150 */
260 TPM_MEDIUM,
261 TPM_MEDIUM,
262 TPM_SHORT,
263 TPM_SHORT,
264 TPM_UNDEFINED, /* 155 */
265 TPM_UNDEFINED,
266 TPM_UNDEFINED,
267 TPM_UNDEFINED,
268 TPM_UNDEFINED,
269 TPM_SHORT, /* 160 */
270 TPM_SHORT,
271 TPM_SHORT,
272 TPM_SHORT,
273 TPM_UNDEFINED,
274 TPM_UNDEFINED, /* 165 */
275 TPM_UNDEFINED,
276 TPM_UNDEFINED,
277 TPM_UNDEFINED,
278 TPM_UNDEFINED,
279 TPM_LONG, /* 170 */
280 TPM_UNDEFINED,
281 TPM_UNDEFINED,
282 TPM_UNDEFINED,
283 TPM_UNDEFINED,
284 TPM_UNDEFINED, /* 175 */
285 TPM_UNDEFINED,
286 TPM_UNDEFINED,
287 TPM_UNDEFINED,
288 TPM_UNDEFINED,
289 TPM_MEDIUM, /* 180 */
290 TPM_SHORT,
291 TPM_MEDIUM,
292 TPM_MEDIUM,
293 TPM_MEDIUM,
294 TPM_MEDIUM, /* 185 */
295 TPM_SHORT,
296 TPM_UNDEFINED,
297 TPM_UNDEFINED,
298 TPM_UNDEFINED,
299 TPM_UNDEFINED, /* 190 */
300 TPM_UNDEFINED,
301 TPM_UNDEFINED,
302 TPM_UNDEFINED,
303 TPM_UNDEFINED,
304 TPM_UNDEFINED, /* 195 */
305 TPM_UNDEFINED,
306 TPM_UNDEFINED,
307 TPM_UNDEFINED,
308 TPM_UNDEFINED,
309 TPM_SHORT, /* 200 */
310 TPM_UNDEFINED,
311 TPM_UNDEFINED,
312 TPM_UNDEFINED,
313 TPM_SHORT,
314 TPM_SHORT, /* 205 */
315 TPM_SHORT,
316 TPM_SHORT,
317 TPM_SHORT,
318 TPM_SHORT,
319 TPM_MEDIUM, /* 210 */
320 TPM_UNDEFINED,
321 TPM_MEDIUM,
322 TPM_MEDIUM,
323 TPM_MEDIUM,
324 TPM_UNDEFINED, /* 215 */
325 TPM_MEDIUM,
326 TPM_UNDEFINED,
327 TPM_UNDEFINED,
328 TPM_SHORT,
329 TPM_SHORT, /* 220 */
330 TPM_SHORT,
331 TPM_SHORT,
332 TPM_SHORT,
333 TPM_SHORT,
334 TPM_UNDEFINED, /* 225 */
335 TPM_UNDEFINED,
336 TPM_UNDEFINED,
337 TPM_UNDEFINED,
338 TPM_UNDEFINED,
339 TPM_SHORT, /* 230 */
340 TPM_LONG,
341 TPM_MEDIUM,
342 TPM_UNDEFINED,
343 TPM_UNDEFINED,
344 TPM_UNDEFINED, /* 235 */
345 TPM_UNDEFINED,
346 TPM_UNDEFINED,
347 TPM_UNDEFINED,
348 TPM_UNDEFINED,
349 TPM_SHORT, /* 240 */
350 TPM_UNDEFINED,
351 TPM_MEDIUM,
352};
353
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000354/* Returns max number of milliseconds to wait */
355static unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip,
356 u32 ordinal)
Rong Chang8faa9452013-04-12 10:44:57 +0000357{
358 int duration_idx = TPM_UNDEFINED;
359 int duration = 0;
360
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000361 if (ordinal < TPM_MAX_ORDINAL) {
Rong Chang8faa9452013-04-12 10:44:57 +0000362 duration_idx = tpm_ordinal_duration[ordinal];
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000363 } else if ((ordinal & TPM_PROTECTED_ORDINAL_MASK) <
364 TPM_MAX_PROTECTED_ORDINAL) {
365 duration_idx = tpm_protected_ordinal_duration[
366 ordinal & TPM_PROTECTED_ORDINAL_MASK];
367 }
Rong Chang8faa9452013-04-12 10:44:57 +0000368
369 if (duration_idx != TPM_UNDEFINED)
370 duration = chip->vendor.duration[duration_idx];
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000371
Rong Chang8faa9452013-04-12 10:44:57 +0000372 if (duration <= 0)
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000373 return 2 * 60 * HZ; /* Two minutes timeout */
Rong Chang8faa9452013-04-12 10:44:57 +0000374 else
375 return duration;
376}
377
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000378static ssize_t tpm_transmit(const unsigned char *buf, size_t bufsiz)
Rong Chang8faa9452013-04-12 10:44:57 +0000379{
Simon Glassc9a3e842015-05-04 11:30:59 -0600380 int rc;
Rong Chang8faa9452013-04-12 10:44:57 +0000381 u32 count, ordinal;
382 unsigned long start, stop;
383
384 struct tpm_chip *chip = &g_chip;
385
386 /* switch endianess: big->little */
387 count = get_unaligned_be32(buf + TPM_CMD_COUNT_BYTE);
388 ordinal = get_unaligned_be32(buf + TPM_CMD_ORDINAL_BYTE);
389
390 if (count == 0) {
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000391 error("no data\n");
Rong Chang8faa9452013-04-12 10:44:57 +0000392 return -ENODATA;
393 }
394 if (count > bufsiz) {
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000395 error("invalid count value %x %zx\n", count, bufsiz);
Rong Chang8faa9452013-04-12 10:44:57 +0000396 return -E2BIG;
397 }
398
Simon Glassc9a3e842015-05-04 11:30:59 -0600399 debug("Calling send\n");
Rong Chang8faa9452013-04-12 10:44:57 +0000400 rc = chip->vendor.send(chip, (u8 *)buf, count);
Simon Glassc9a3e842015-05-04 11:30:59 -0600401 debug(" ... done calling send\n");
Rong Chang8faa9452013-04-12 10:44:57 +0000402 if (rc < 0) {
Simon Glassc9a3e842015-05-04 11:30:59 -0600403 error("tpm_transmit: tpm_send: error %d\n", rc);
Rong Chang8faa9452013-04-12 10:44:57 +0000404 goto out;
405 }
406
407 if (chip->vendor.irq)
408 goto out_recv;
409
410 start = get_timer(0);
411 stop = tpm_calc_ordinal_duration(chip, ordinal);
412 do {
Simon Glassc9a3e842015-05-04 11:30:59 -0600413 debug("waiting for status... %ld %ld\n", start, stop);
Rong Chang8faa9452013-04-12 10:44:57 +0000414 u8 status = chip->vendor.status(chip);
415 if ((status & chip->vendor.req_complete_mask) ==
416 chip->vendor.req_complete_val) {
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000417 debug("...got it;\n");
Rong Chang8faa9452013-04-12 10:44:57 +0000418 goto out_recv;
419 }
420
Jeroen Hofsteea9b6ef12014-06-18 22:59:48 +0200421 if (status == chip->vendor.req_canceled) {
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000422 error("Operation Canceled\n");
Rong Chang8faa9452013-04-12 10:44:57 +0000423 rc = -ECANCELED;
424 goto out;
425 }
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000426 udelay(TPM_TIMEOUT * 1000);
Rong Chang8faa9452013-04-12 10:44:57 +0000427 } while (get_timer(start) < stop);
428
429 chip->vendor.cancel(chip);
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000430 error("Operation Timed out\n");
Rong Chang8faa9452013-04-12 10:44:57 +0000431 rc = -ETIME;
432 goto out;
433
434out_recv:
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000435 debug("out_recv: reading response...\n");
Rong Chang8faa9452013-04-12 10:44:57 +0000436 rc = chip->vendor.recv(chip, (u8 *)buf, TPM_BUFSIZE);
437 if (rc < 0)
Simon Glassc9a3e842015-05-04 11:30:59 -0600438 error("tpm_transmit: tpm_recv: error %d\n", rc);
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000439
Rong Chang8faa9452013-04-12 10:44:57 +0000440out:
441 return rc;
442}
443
Simon Glassc9a3e842015-05-04 11:30:59 -0600444#ifdef CONFIG_DM_I2C
445static int tpm_open_dev(struct udevice *dev)
446{
447 int rc;
448
449 debug("%s: start\n", __func__);
450 if (g_chip.is_open)
451 return -EBUSY;
452 rc = tpm_vendor_init_dev(dev);
453 if (rc < 0)
454 g_chip.is_open = 0;
455 return rc;
456}
457#else
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000458static int tpm_open(uint32_t dev_addr)
459{
460 int rc;
Simon Glassc9a3e842015-05-04 11:30:59 -0600461
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000462 if (g_chip.is_open)
463 return -EBUSY;
464 rc = tpm_vendor_init(dev_addr);
465 if (rc < 0)
466 g_chip.is_open = 0;
467 return rc;
468}
Simon Glassc9a3e842015-05-04 11:30:59 -0600469#endif
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000470static void tpm_close(void)
471{
472 if (g_chip.is_open) {
473 tpm_vendor_cleanup(&g_chip);
474 g_chip.is_open = 0;
475 }
476}
Rong Chang8faa9452013-04-12 10:44:57 +0000477
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000478static int tpm_select(void)
479{
Simon Glassc9a3e842015-05-04 11:30:59 -0600480#ifndef CONFIG_DM_I2C
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000481 int ret;
Rong Chang8faa9452013-04-12 10:44:57 +0000482
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000483 tpm.old_bus = i2c_get_bus_num();
484 if (tpm.old_bus != tpm.i2c_bus) {
485 ret = i2c_set_bus_num(tpm.i2c_bus);
486 if (ret) {
487 debug("%s: Fail to set i2c bus %d\n", __func__,
488 tpm.i2c_bus);
489 return -1;
490 }
491 }
Simon Glassc9a3e842015-05-04 11:30:59 -0600492#endif
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000493 return 0;
494}
495
496static int tpm_deselect(void)
497{
Simon Glassc9a3e842015-05-04 11:30:59 -0600498#ifndef CONFIG_DM_I2C
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000499 int ret;
500
501 if (tpm.old_bus != i2c_get_bus_num()) {
502 ret = i2c_set_bus_num(tpm.old_bus);
503 if (ret) {
504 debug("%s: Fail to restore i2c bus %d\n",
505 __func__, tpm.old_bus);
506 return -1;
507 }
508 }
509 tpm.old_bus = -1;
Simon Glassc9a3e842015-05-04 11:30:59 -0600510#endif
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000511 return 0;
512}
513
514/**
515 * Decode TPM configuration.
516 *
517 * @param dev Returns a configuration of TPM device
518 * @return 0 if ok, -1 on error
519 */
520static int tpm_decode_config(struct tpm *dev)
521{
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000522 const void *blob = gd->fdt_blob;
Simon Glassc9a3e842015-05-04 11:30:59 -0600523 int parent;
524 int node;
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000525
526 node = fdtdec_next_compatible(blob, 0, COMPAT_INFINEON_SLB9635_TPM);
527 if (node < 0) {
528 node = fdtdec_next_compatible(blob, 0,
529 COMPAT_INFINEON_SLB9645_TPM);
530 }
531 if (node < 0) {
532 debug("%s: Node not found\n", __func__);
533 return -1;
534 }
535 parent = fdt_parent_offset(blob, node);
536 if (parent < 0) {
537 debug("%s: Cannot find node parent\n", __func__);
538 return -1;
539 }
Simon Glassc9a3e842015-05-04 11:30:59 -0600540#ifdef CONFIG_DM_I2C
541 struct udevice *bus;
542 int chip_addr;
543 int ret;
544
545 /*
546 * TODO(sjg@chromium.org): Remove this when driver model supports
547 * TPMs
548 */
549 ret = uclass_get_device_by_of_offset(UCLASS_I2C, parent, &bus);
550 if (ret) {
551 debug("Cannot find bus for node '%s: ret=%d'\n",
552 fdt_get_name(blob, parent, NULL), ret);
553 return ret;
554 }
555
556 chip_addr = fdtdec_get_int(blob, node, "reg", -1);
557 if (chip_addr == -1) {
558 debug("Cannot find reg property for node '%s: ret=%d'\n",
559 fdt_get_name(blob, node, NULL), ret);
560 return ret;
561 }
562 /*
563 * TODO(sjg@chromium.org): Older TPMs will need to use the older method
564 * in iic_tpm_read() so the offset length needs to be 0 here.
565 */
566 ret = i2c_get_chip(bus, chip_addr, 1, &dev->dev);
567 if (ret) {
568 debug("Cannot find device for node '%s: ret=%d'\n",
569 fdt_get_name(blob, node, NULL), ret);
570 return ret;
571 }
572#else
573 int i2c_bus;
574
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000575 i2c_bus = i2c_get_bus_num_fdt(parent);
576 if (i2c_bus < 0)
577 return -1;
578 dev->i2c_bus = i2c_bus;
579 dev->slave_addr = fdtdec_get_addr(blob, node, "reg");
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000580#endif
Simon Glassc9a3e842015-05-04 11:30:59 -0600581
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000582 return 0;
583}
Rong Chang8faa9452013-04-12 10:44:57 +0000584
585struct tpm_chip *tpm_register_hardware(const struct tpm_vendor_specific *entry)
586{
587 struct tpm_chip *chip;
588
589 /* Driver specific per-device data */
590 chip = &g_chip;
591 memcpy(&chip->vendor, entry, sizeof(struct tpm_vendor_specific));
592 chip->is_open = 1;
593
594 return chip;
595}
596
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000597int tis_init(void)
598{
599 if (tpm.inited)
600 return 0;
601
602 if (tpm_decode_config(&tpm))
603 return -1;
604
605 if (tpm_select())
606 return -1;
607
Simon Glassc9a3e842015-05-04 11:30:59 -0600608#ifndef CONFIG_DM_I2C
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000609 /*
610 * Probe TPM twice; the first probing might fail because TPM is asleep,
611 * and the probing can wake up TPM.
612 */
613 if (i2c_probe(tpm.slave_addr) && i2c_probe(tpm.slave_addr)) {
614 debug("%s: fail to probe i2c addr 0x%x\n", __func__,
615 tpm.slave_addr);
616 return -1;
617 }
Simon Glassc9a3e842015-05-04 11:30:59 -0600618#endif
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000619
620 tpm_deselect();
Simon Glassc9a3e842015-05-04 11:30:59 -0600621 debug("%s: done\n", __func__);
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000622
623 tpm.inited = 1;
624
625 return 0;
626}
627
628int tis_open(void)
Rong Chang8faa9452013-04-12 10:44:57 +0000629{
630 int rc;
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000631
632 if (!tpm.inited)
633 return -1;
634
635 if (tpm_select())
636 return -1;
637
Simon Glassc9a3e842015-05-04 11:30:59 -0600638#ifdef CONFIG_DM_I2C
639 rc = tpm_open_dev(tpm.dev);
640#else
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000641 rc = tpm_open(tpm.slave_addr);
Simon Glassc9a3e842015-05-04 11:30:59 -0600642#endif
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000643
644 tpm_deselect();
645
Rong Chang8faa9452013-04-12 10:44:57 +0000646 return rc;
647}
648
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000649int tis_close(void)
Rong Chang8faa9452013-04-12 10:44:57 +0000650{
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000651 if (!tpm.inited)
652 return -1;
653
654 if (tpm_select())
655 return -1;
656
657 tpm_close();
658
659 tpm_deselect();
660
661 return 0;
662}
663
664int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
665 uint8_t *recvbuf, size_t *rbuf_len)
666{
667 int len;
668 uint8_t buf[4096];
669
670 if (!tpm.inited)
671 return -1;
672
673 if (sizeof(buf) < sbuf_size)
674 return -1;
675
676 memcpy(buf, sendbuf, sbuf_size);
677
678 if (tpm_select())
679 return -1;
680
681 len = tpm_transmit(buf, sbuf_size);
682
683 tpm_deselect();
684
685 if (len < 10) {
686 *rbuf_len = 0;
687 return -1;
Rong Chang8faa9452013-04-12 10:44:57 +0000688 }
Tom Wai-Hong Tame49fed52013-04-12 11:04:37 +0000689
690 memcpy(recvbuf, buf, len);
691 *rbuf_len = len;
692
693 return 0;
Rong Chang8faa9452013-04-12 10:44:57 +0000694}