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tpm: Clean up I2C TPM driver 

Drop a lot of u-boot-isms and share common TIS API
between I2C driver and LPC driver.

Signed-off-by: Stefan Reinauer <reinauer@google.com>

Change-Id: I43be8eea0acbdaef58ef256a2bc5336b83368a0e
Reviewed-on: https://chromium-review.googlesource.com/175670
Commit-Queue: Stefan Reinauer <reinauer@chromium.org>
Tested-by: Stefan Reinauer <reinauer@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
(cherry picked from commit 3fc8515b9dcef66998658e1aa5c020d22509810c)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6855
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
This commit is contained in:
Stefan Reinauer 2013-11-04 17:38:32 -08:00 committed by Isaac Christensen
parent 5c85e66b17
commit d518c7a2d7
12 changed files with 695 additions and 827 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
src/drivers/i2c/tpm/Kconfig
View File

@ -2,6 +2,11 @@ config I2C_TPM
bool "I2C TPM" bool "I2C TPM"
depends on !PC80 # for now depends on !PC80 # for now
config DRIVER_TPM_I2C_BUS
hex "I2C TPM chip bus"
default 9 # FIXME, workaround for Kconfig BS
depends on I2C_TPM
config DRIVER_TPM_I2C_ADDR config DRIVER_TPM_I2C_ADDR
hex "I2C TPM chip address" hex "I2C TPM chip address"
default 2 # FIXME, workaround for Kconfig BS default 2 # FIXME, workaround for Kconfig BS

4
src/drivers/i2c/tpm/Makefile.inc
View File

@ -1,2 +1,2 @@
ramstage-$(CONFIG_I2C_TPM) += tis_i2c.c tpm.c tpm_tis_i2c.c ramstage-$(CONFIG_I2C_TPM) += tis.c tpm.c
romstage-$(CONFIG_I2C_TPM) += tis_i2c.c tpm.c tpm_tis_i2c.c romstage-$(CONFIG_I2C_TPM) += tis.c tpm.c

182
src/drivers/i2c/tpm/tis.c Normal file
View File

@ -0,0 +1,182 @@
/*
* Copyright (C) 2011 Infineon Technologies
* Copyright 2013 Google Inc.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but without any warranty; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <stdint.h>
#include <string.h>
#include <assert.h>
#include <delay.h>
#include <arch/byteorder.h>
#include <device/i2c.h>
#include <tpm.h>
#include "tpm.h"
#include <console/console.h>
/* global structure for tpm chip data */
struct tpm_chip g_chip;
#define TPM_CMD_COUNT_BYTE 2
#define TPM_CMD_ORDINAL_BYTE 6
int tis_open(void)
{
int rc;
if (g_chip.is_open) {
printk(BIOS_DEBUG, "tis_open() called twice.\n");
return -1;
}
rc = tpm_vendor_init(CONFIG_DRIVER_TPM_I2C_BUS,
CONFIG_DRIVER_TPM_I2C_ADDR);
if (rc < 0)
g_chip.is_open = 0;
if (rc) {
return -1;
}
return 0;
}
int tis_close(void)
{
if (g_chip.is_open) {
tpm_vendor_cleanup(&g_chip);
g_chip.is_open = 0;
}
return 0;
}
int tis_init(void)
{
int bus = CONFIG_DRIVER_TPM_I2C_BUS;
int chip = CONFIG_DRIVER_TPM_I2C_ADDR;
/*
* Probe TPM twice; the first probing might fail because TPM is asleep,
* and the probing can wake up TPM.
*/
uint8_t tmp;
if (i2c_read(bus, chip, 0, 0, &tmp, sizeof(tmp)) &&
i2c_read(bus, chip, 0, 0, &tmp, sizeof(tmp)))
return -1;
return 0;
}
static ssize_t tpm_transmit(const uint8_t *buf, size_t bufsiz)
{
int rc;
uint32_t count, ordinal;
struct tpm_chip *chip = &g_chip;
memcpy(&count, buf + TPM_CMD_COUNT_BYTE, sizeof(count));
count = be32_to_cpu(count);
memcpy(&ordinal, buf + TPM_CMD_ORDINAL_BYTE, sizeof(ordinal));
ordinal = be32_to_cpu(ordinal);
if (count == 0) {
printk(BIOS_DEBUG, "tpm_transmit: no data\n");
return -1;
}
if (count > bufsiz) {
printk(BIOS_DEBUG, "tpm_transmit: invalid count value %x %zx\n",
count, bufsiz);
return -1;
}
ASSERT(chip->vendor.send);
rc = chip->vendor.send(chip, (uint8_t *) buf, count);
if (rc < 0) {
printk(BIOS_DEBUG, "tpm_transmit: tpm_send error\n");
goto out;
}
if (chip->vendor.irq)
goto out_recv;
int timeout = 2 * 60 * 1000; /* two minutes timeout */
while (timeout) {
ASSERT(chip->vendor.status);
uint8_t status = chip->vendor.status(chip);
if ((status & chip->vendor.req_complete_mask) ==
chip->vendor.req_complete_val) {
goto out_recv;
}
if ((status == chip->vendor.req_canceled)) {
printk(BIOS_DEBUG, "tpm_transmit: Operation Canceled\n");
rc = -1;
goto out;
}
mdelay(TPM_TIMEOUT);
timeout--;
}
ASSERT(chip->vendor.cancel);
chip->vendor.cancel(chip);
printk(BIOS_DEBUG, "tpm_transmit: Operation Timed out\n");
rc = -1; //ETIME;
goto out;
out_recv:
rc = chip->vendor.recv(chip, (uint8_t *) buf, TPM_BUFSIZE);
if (rc < 0)
printk(BIOS_DEBUG, "tpm_transmit: tpm_recv: error %zd\n", rc);
out:
return rc;
}
int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
uint8_t *recvbuf, size_t *rbuf_len)
{
uint8_t buf[TPM_BUFSIZE];
if (sizeof(buf) < sbuf_size)
return -1;
memcpy(buf, sendbuf, sbuf_size);
int len = tpm_transmit(buf, sbuf_size);
if (len < 10) {
*rbuf_len = 0;
return -1;
}
if (len > *rbuf_len) {
*rbuf_len = len;
return -1;
}
memcpy(recvbuf, buf, len);
*rbuf_len = len;
return 0;
}

103
src/drivers/i2c/tpm/tis_i2c.c
View File

@ -1,103 +0,0 @@
/*
* Copyright 2013 Google Inc.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but without any warranty; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <stdint.h>
#include <string.h>
#include <device/i2c.h>
#include "tis.h"
#include "tpm.h"
static unsigned bus = 0;
static int opened;
void tis_set_i2c_bus(unsigned _bus)
{
bus = _bus;
}
int tis_open(void)
{
opened = 1;
if (tpm_open(bus, CONFIG_DRIVER_TPM_I2C_ADDR)) {
opened = 0;
return -1;
}
return 0;
}
int tis_close(void)
{
opened = 0;
tpm_close();
return 0;
}
int tis_init(void)
{
int chip = CONFIG_DRIVER_TPM_I2C_ADDR;
/*
* Probe TPM twice; the first probing might fail because TPM is asleep,
* and the probing can wake up TPM.
*/
uint8_t tmp;
if (!bus)
return -1;
if (i2c_read(bus, chip, 0, 0, &tmp, sizeof(tmp)) &&
i2c_read(bus, chip, 0, 0, &tmp, sizeof(tmp)))
return -1;
return 0;
}
int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
uint8_t *recvbuf, size_t *rbuf_len)
{
uint8_t buf[TPM_BUFSIZE];
if (!opened && tis_open())
return -1;
if (sizeof(buf) < sbuf_size)
return -1;
memcpy(buf, sendbuf, sbuf_size);
int len = tpm_transmit(buf, sbuf_size);
if (len < 10) {
*rbuf_len = 0;
return -1;
}
if (len > *rbuf_len) {
*rbuf_len = len;
return -1;
}
memcpy(recvbuf, buf, len);
*rbuf_len = len;
return 0;
}

571
src/drivers/i2c/tpm/tpm.c
View File

@ -8,6 +8,10 @@
* Device driver for TCG/TCPA TPM (trusted platform module). * Device driver for TCG/TCPA TPM (trusted platform module).
* Specifications at www.trustedcomputinggroup.org * Specifications at www.trustedcomputinggroup.org
* *
* This device driver implements the TPM interface as defined in
* the TCG TPM Interface Spec version 1.2, revision 1.0 and the
* Infineon I2C Protocol Stack Specification v0.20.
*
* It is based on the Linux kernel driver tpm.c from Leendert van * It is based on the Linux kernel driver tpm.c from Leendert van
* Dorn, Dave Safford, Reiner Sailer, and Kyleen Hall. * Dorn, Dave Safford, Reiner Sailer, and Kyleen Hall.
* *
@ -34,113 +38,524 @@
#include <stdint.h> #include <stdint.h>
#include <string.h> #include <string.h>
#include <assert.h> #include <types.h>
#include <delay.h> #include <delay.h>
#include <console/console.h> #include <console/console.h>
#include <arch/byteorder.h> #include <arch/byteorder.h>
#include "tis.h" #include <device/i2c.h>
#include "tpm.h" #include "tpm.h"
/* global structure for tpm chip data */ /* max. buffer size supported by our TPM */
struct tpm_chip g_chip; #ifdef TPM_BUFSIZE
#undef TPM_BUFSIZE
#endif
#define TPM_BUFSIZE 1260
#define TPM_CMD_COUNT_BYTE 2 /* Address of the TPM on the I2C bus */
#define TPM_CMD_ORDINAL_BYTE 6 #define TPM_I2C_ADDR 0x20
ssize_t tpm_transmit(const uint8_t *buf, size_t bufsiz) /* max. number of iterations after I2C NAK */
#define MAX_COUNT 3
#define SLEEP_DURATION 60 /* in usec */
/* max. number of iterations after I2C NAK for 'long' commands
* we need this especially for sending TPM_READY, since the cleanup after the
* transtion to the ready state may take some time, but it is unpredictable
* how long it will take.
*/
#define MAX_COUNT_LONG 50
#define SLEEP_DURATION_LONG 210 /* in usec */
/* expected value for DIDVID register */
#define TPM_TIS_I2C_DID_VID_9635 0x000b15d1L
#define TPM_TIS_I2C_DID_VID_9645 0x001a15d1L
enum i2c_chip_type {
SLB9635,
SLB9645,
UNKNOWN,
};
static const char * const chip_name[] = {
[SLB9635] = "slb9635tt",
[SLB9645] = "slb9645tt",
[UNKNOWN] = "unknown/fallback to slb9635",
};
/* Structure to store I2C TPM specific stuff */
struct tpm_inf_dev {
unsigned bus;
unsigned int addr;
uint8_t buf[TPM_BUFSIZE + sizeof(uint8_t)]; // max. buffer size + addr
enum i2c_chip_type chip_type;
};
static struct tpm_inf_dev tpm_dev = {
.addr = TPM_I2C_ADDR
};
/*
* iic_tpm_read() - read from TPM register
* @addr: register address to read from
* @buffer: provided by caller
* @len: number of bytes to read
*
* Read len bytes from TPM register and put them into
* buffer (little-endian format, i.e. first byte is put into buffer[0]).
*
* NOTE: TPM is big-endian for multi-byte values. Multi-byte
* values have to be swapped.
*
* Return -1 on error, 0 on success.
*/
static int iic_tpm_read(uint8_t addr, uint8_t *buffer, size_t len)
{ {
ssize_t rc; int rc;
uint32_t count, ordinal; int count;
struct tpm_chip *chip = &g_chip; if (!tpm_dev.bus)
return -1;
if ((tpm_dev.chip_type == SLB9635) || (tpm_dev.chip_type == UNKNOWN)) {
/* slb9635 protocol should work in both cases */
for (count = 0; count < MAX_COUNT; count++) {
rc = i2c_write(tpm_dev.bus, tpm_dev.addr,
0, 0, &addr, 1);
if (rc == 0)
break; /* success, break to skip sleep */
memcpy(&count, buf + TPM_CMD_COUNT_BYTE, sizeof(count)); udelay(SLEEP_DURATION);
count = be32_to_cpu(count); }
memcpy(&ordinal, buf + TPM_CMD_ORDINAL_BYTE, sizeof(ordinal));
ordinal = be32_to_cpu(ordinal);
if (count == 0) { if (rc)
printk(BIOS_DEBUG, "tpm_transmit: no data\n"); return -1;
return -1; //ENODATA;
} /* After the TPM has successfully received the register address
if (count > bufsiz) { * it needs some time, thus we're sleeping here again, before
printk(BIOS_DEBUG, "tpm_transmit: invalid count value %x %zx\n", * retrieving the data
count, bufsiz); */
return -1; //E2BIG; for (count = 0; count < MAX_COUNT; count++) {
udelay(SLEEP_DURATION);
rc = i2c_read(tpm_dev.bus, tpm_dev.addr,
0, 0, buffer, len);
if (rc == 0)
break; /* success, break to skip sleep */
}
} else {
/* use a combined read for newer chips
* unfortunately the smbus functions are not suitable due to
* the 32 byte limit of the smbus.
* retries should usually not be needed, but are kept just to
* be safe on the safe side.
*/
for (count = 0; count < MAX_COUNT; count++) {
rc = i2c_read(tpm_dev.bus, tpm_dev.addr,
addr, 1, buffer, len);
if (rc == 0)
break; /* break here to skip sleep */
udelay(SLEEP_DURATION);
}
} }
ASSERT(chip->vendor.send); /* take care of 'guard time' */
rc = chip->vendor.send(chip, (uint8_t *) buf, count); udelay(SLEEP_DURATION);
if (rc < 0) { if (rc)
printk(BIOS_DEBUG, "tpm_transmit: tpm_send: error %zd\n", rc); return -1;
goto out;
return 0;
}
static int iic_tpm_write_generic(uint8_t addr, uint8_t *buffer, size_t len,
unsigned int sleep_time,
uint8_t max_count)
{
int rc = 0;
int count;
if (len > TPM_BUFSIZE) {
printk(BIOS_DEBUG, "%s: Length %d is too large\n", __func__, len);
return -1;
} }
if (chip->vendor.irq) /* prepare send buffer */
goto out_recv; tpm_dev.buf[0] = addr;
memcpy(&(tpm_dev.buf[1]), buffer, len);
int timeout = 2 * 60 * 1000; /* two minutes timeout */ if (!tpm_dev.bus)
return -1;
for (count = 0; count < max_count; count++) {
rc = i2c_write(tpm_dev.bus, tpm_dev.addr, 0, 0,
tpm_dev.buf, len + 1);
if (rc == 0)
break; /* success, break to skip sleep */
udelay(sleep_time);
}
/* take care of 'guard time' */
udelay(SLEEP_DURATION);
if (rc)
return -1;
return 0;
}
/*
* iic_tpm_write() - write to TPM register
* @addr: register address to write to
* @buffer: containing data to be written
* @len: number of bytes to write
*
* Write len bytes from provided buffer to TPM register (little
* endian format, i.e. buffer[0] is written as first byte).
*
* NOTE: TPM is big-endian for multi-byte values. Multi-byte
* values have to be swapped.
*
* NOTE: use this function instead of the iic_tpm_write_generic function.
*
* Return -EIO on error, 0 on success
*/
static int iic_tpm_write(uint8_t addr, uint8_t *buffer, size_t len)
{
return iic_tpm_write_generic(addr, buffer, len, SLEEP_DURATION,
MAX_COUNT);
}
/*
* This function is needed especially for the cleanup situation after
* sending TPM_READY
* */
static int iic_tpm_write_long(uint8_t addr, uint8_t *buffer, size_t len)
{
return iic_tpm_write_generic(addr, buffer, len, SLEEP_DURATION_LONG,
MAX_COUNT_LONG);
}
#define TPM_HEADER_SIZE 10
enum tis_access {
TPM_ACCESS_VALID = 0x80,
TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
TPM_ACCESS_REQUEST_PENDING = 0x04,
TPM_ACCESS_REQUEST_USE = 0x02,
};
enum tis_status {
TPM_STS_VALID = 0x80,
TPM_STS_COMMAND_READY = 0x40,
TPM_STS_GO = 0x20,
TPM_STS_DATA_AVAIL = 0x10,
TPM_STS_DATA_EXPECT = 0x08,
};
#define TPM_ACCESS(l) (0x0000 | ((l) << 4))
#define TPM_STS(l) (0x0001 | ((l) << 4))
#define TPM_DATA_FIFO(l) (0x0005 | ((l) << 4))
#define TPM_DID_VID(l) (0x0006 | ((l) << 4))
static int check_locality(struct tpm_chip *chip, int loc)
{
uint8_t buf;
if (iic_tpm_read(TPM_ACCESS(loc), &buf, 1) < 0)
return -1;
if ((buf & (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) ==
(TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) {
chip->vendor.locality = loc;
return loc;
}
return -1;
}
static void release_locality(struct tpm_chip *chip, int loc, int force)
{
uint8_t buf;
if (iic_tpm_read(TPM_ACCESS(loc), &buf, 1) < 0)
return;
if (force || (buf & (TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID)) ==
(TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID)) {
buf = TPM_ACCESS_ACTIVE_LOCALITY;
iic_tpm_write(TPM_ACCESS(loc), &buf, 1);
}
}
static int request_locality(struct tpm_chip *chip, int loc)
{
uint8_t buf = TPM_ACCESS_REQUEST_USE;
if (check_locality(chip, loc) >= 0)
return loc; /* we already have the locality */
iic_tpm_write(TPM_ACCESS(loc), &buf, 1);
/* wait for burstcount */
int timeout = 2 * 1000; /* 2s timeout */
while (timeout) { while (timeout) {
ASSERT(chip->vendor.status); if (check_locality(chip, loc) >= 0)
uint8_t status = chip->vendor.status(chip); return loc;
if ((status & chip->vendor.req_complete_mask) ==
chip->vendor.req_complete_val) {
goto out_recv;
}
if ((status == chip->vendor.req_canceled)) {
printk(BIOS_DEBUG, "tpm_transmit: Operation Canceled\n");
rc = -1;
goto out;
}
mdelay(TPM_TIMEOUT); mdelay(TPM_TIMEOUT);
timeout--; timeout--;
} }
ASSERT(chip->vendor.cancel); return -1;
chip->vendor.cancel(chip);
printk(BIOS_DEBUG, "tpm_transmit: Operation Timed out\n");
rc = -1; //ETIME;
goto out;
out_recv:
rc = chip->vendor.recv(chip, (uint8_t *) buf, TPM_BUFSIZE);
if (rc < 0)
printk(BIOS_DEBUG, "tpm_transmit: tpm_recv: error %zd\n", rc);
out:
return rc;
} }
#define TPM_ERROR_SIZE 10 static uint8_t tpm_tis_i2c_status(struct tpm_chip *chip)
struct tpm_chip *tpm_register_hardware(const struct tpm_vendor_specific *entry)
{ {
struct tpm_chip *chip; /* NOTE: Since I2C read may fail, return 0 in this case --> time-out */
uint8_t buf;
if (iic_tpm_read(TPM_STS(chip->vendor.locality), &buf, 1) < 0)
return 0;
else
return buf;
}
static void tpm_tis_i2c_ready(struct tpm_chip *chip)
{
/* this causes the current command to be aborted */
uint8_t buf = TPM_STS_COMMAND_READY;
iic_tpm_write_long(TPM_STS(chip->vendor.locality), &buf, 1);
}
static ssize_t get_burstcount(struct tpm_chip *chip)
{
ssize_t burstcnt;
uint8_t buf[3];
/* wait for burstcount */
int timeout = 2 * 1000; /* 2s timeout */
while (timeout) {
/* Note: STS is little endian */
if (iic_tpm_read(TPM_STS(chip->vendor.locality) + 1, buf, 3) < 0)
burstcnt = 0;
else
burstcnt = (buf[2] << 16) + (buf[1] << 8) + buf[0];
if (burstcnt)
return burstcnt;
mdelay(TPM_TIMEOUT);
timeout--;
}
return -1;
}
static int wait_for_stat(struct tpm_chip *chip, uint8_t mask, int *status)
{
unsigned long timeout = 2 * 1024;
while (timeout) {
*status = tpm_tis_i2c_status(chip);
if ((*status & mask) == mask)
return 0;
mdelay(TPM_TIMEOUT);
timeout--;
}
return -1;
}
static int recv_data(struct tpm_chip *chip, uint8_t *buf, size_t count)
{
size_t size = 0;
while (size < count) {
ssize_t burstcnt = get_burstcount(chip);
int rc;
/* burstcount < 0 = TPM is busy */
if (burstcnt < 0)
return burstcnt;
/* limit received data to max. left */
if (burstcnt > (count - size))
burstcnt = count - size;
rc = iic_tpm_read(TPM_DATA_FIFO(chip->vendor.locality),
&(buf[size]),
burstcnt);
if (rc == 0)
size += burstcnt;
}
return size;
}
static int tpm_tis_i2c_recv(struct tpm_chip *chip, uint8_t *buf, size_t count)
{
int size = 0;
uint32_t expected;
int status;
if (count < TPM_HEADER_SIZE) {
size = -1;
goto out;
}
/* read first 10 bytes, including tag, paramsize, and result */
size = recv_data(chip, buf, TPM_HEADER_SIZE);
if (size < TPM_HEADER_SIZE) {
printk(BIOS_DEBUG, "tpm_tis_i2c_recv: Unable to read header\n");
goto out;
}
memcpy(&expected, buf + TPM_RSP_SIZE_BYTE, sizeof(expected));
expected = be32_to_cpu(expected);
if ((size_t)expected > count) {
size = -1;
goto out;
}
size += recv_data(chip, &buf[TPM_HEADER_SIZE],
expected - TPM_HEADER_SIZE);
if (size < expected) {
printk(BIOS_DEBUG, "tpm_tis_i2c_recv: Unable to "
"read remainder of result\n");
size = -1;
goto out;
}
wait_for_stat(chip, TPM_STS_VALID, &status);
if (status & TPM_STS_DATA_AVAIL) { /* retry? */
printk(BIOS_DEBUG, "tpm_tis_i2c_recv: Error left over data\n");
size = -1;
goto out;
}
out:
tpm_tis_i2c_ready(chip);
return size;
}
static int tpm_tis_i2c_send(struct tpm_chip *chip, uint8_t *buf, size_t len)
{
int status;
size_t count = 0;
uint8_t sts = TPM_STS_GO;
if (len > TPM_BUFSIZE)
return -1; /* command is too long for our TPM, sorry */
status = tpm_tis_i2c_status(chip);
if ((status & TPM_STS_COMMAND_READY) == 0) {
tpm_tis_i2c_ready(chip);
if (wait_for_stat(chip, TPM_STS_COMMAND_READY, &status) < 0)
goto out_err;
}
while (count < len - 1) {
ssize_t burstcnt = get_burstcount(chip);
/* burstcount < 0 = TPM is busy */
if (burstcnt < 0)
return burstcnt;
if (burstcnt > (len-1-count))
burstcnt = len-1-count;
#ifdef CONFIG_TPM_I2C_BURST_LIMITATION
if (burstcnt > CONFIG_TPM_I2C_BURST_LIMITATION)
burstcnt = CONFIG_TPM_I2C_BURST_LIMITATION;
#endif /* CONFIG_TPM_I2C_BURST_LIMITATION */
if (iic_tpm_write(TPM_DATA_FIFO(chip->vendor.locality),
&(buf[count]), burstcnt) == 0)
count += burstcnt;
wait_for_stat(chip, TPM_STS_VALID, &status);
if ((status & TPM_STS_DATA_EXPECT) == 0)
goto out_err;
}
/* write last byte */
iic_tpm_write(TPM_DATA_FIFO(chip->vendor.locality), &(buf[count]), 1);
wait_for_stat(chip, TPM_STS_VALID, &status);
if ((status & TPM_STS_DATA_EXPECT) != 0)
goto out_err;
/* go and do it */
iic_tpm_write(TPM_STS(chip->vendor.locality), &sts, 1);
return len;
out_err:
tpm_tis_i2c_ready(chip);
return -1;
}
static struct tpm_vendor_specific tpm_tis_i2c = {
.status = tpm_tis_i2c_status,
.recv = tpm_tis_i2c_recv,
.send = tpm_tis_i2c_send,
.cancel = tpm_tis_i2c_ready,
.req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
.req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
.req_canceled = TPM_STS_COMMAND_READY,
};
/* Initialization of I2C TPM */
int tpm_vendor_init(unsigned bus, uint32_t dev_addr)
{
uint32_t vendor;
unsigned int old_addr;
struct tpm_chip *chip;
extern struct tpm_chip g_chip;
old_addr = tpm_dev.addr;
if (dev_addr != 0)
tpm_dev.addr = dev_addr;
tpm_dev.bus = bus;
/* Driver specific per-device data */
chip = &g_chip; chip = &g_chip;
memcpy(&chip->vendor, entry, sizeof(struct tpm_vendor_specific)); memcpy(&chip->vendor, &tpm_tis_i2c, sizeof(struct tpm_vendor_specific));
chip->is_open = 1; chip->is_open = 1;
return chip; /* Disable interrupts (not supported) */
} chip->vendor.irq = 0;
int tpm_open(unsigned bus, uint32_t dev_addr) if (request_locality(chip, 0) != 0)
{ goto out_err;
int rc;
if (g_chip.is_open)
return -1; //EBUSY;
rc = tpm_vendor_init(bus, dev_addr);
if (rc < 0)
g_chip.is_open = 0;
return rc;
}
void tpm_close(void) /* Read four bytes from DID_VID register */
{ if (iic_tpm_read(TPM_DID_VID(0), (uint8_t *)&vendor, 4) < 0)
if (g_chip.is_open) { goto out_release;
tpm_vendor_cleanup(&g_chip);
g_chip.is_open = 0; if (vendor == TPM_TIS_I2C_DID_VID_9645) {
tpm_dev.chip_type = SLB9645;
} else if (be32_to_cpu(vendor) == TPM_TIS_I2C_DID_VID_9635) {
tpm_dev.chip_type = SLB9635;
} else {
printk(BIOS_DEBUG, "Vendor ID 0x%08x not recognized.\n", vendor);
goto out_release;
} }
printk(BIOS_DEBUG, "1.2 TPM (chip type %s device-id 0x%X)\n",
chip_name[tpm_dev.chip_type], vendor >> 16);
/*
* A timeout query to TPM can be placed here.
* Standard timeout values are used so far
*/
return 0;
out_release:
release_locality(chip, 0, 1);
out_err:
tpm_dev.addr = old_addr;
return -1;
}
void tpm_vendor_cleanup(struct tpm_chip *chip)
{
release_locality(chip, chip->vendor.locality, 1);
} }

19
src/drivers/i2c/tpm/tpm.h
View File

@ -128,29 +128,10 @@ struct tpm_cmd_t {
tpm_cmd_params params; tpm_cmd_params params;
} __attribute__ ((packed)); } __attribute__ ((packed));
/* ---------- Interface for TPM vendor ------------ */ /* ---------- Interface for TPM vendor ------------ */
struct tpm_chip *tpm_register_hardware(const struct tpm_vendor_specific *);
int tpm_vendor_init(unsigned bus, uint32_t dev_addr); int tpm_vendor_init(unsigned bus, uint32_t dev_addr);
void tpm_vendor_cleanup(struct tpm_chip *chip); void tpm_vendor_cleanup(struct tpm_chip *chip);
/* ---------- Interface for TDDL ------------------- */
/*
* if dev_addr != 0 - redefines TPM device address
* Returns < 0 on error, 0 on success.
*/
int tpm_open(unsigned bus, uint32_t dev_addr);
void tpm_close(void);
/*
* Transmit bufsiz bytes out of buf to TPM and get results back in buf, too.
* Returns < 0 on error, 0 on success.
*/
ssize_t tpm_transmit(const unsigned char *buf, size_t bufsiz);
#endif /* __DRIVERS_TPM_SLB9635_I2C_TPM_H__ */ #endif /* __DRIVERS_TPM_SLB9635_I2C_TPM_H__ */

578
src/drivers/i2c/tpm/tpm_tis_i2c.c
View File

@ -1,578 +0,0 @@
/*
* Copyright (C) 2011 Infineon Technologies
*
* Authors:
* Peter Huewe <huewe.external@infineon.com>
*
* Description:
* Device driver for TCG/TCPA TPM (trusted platform module).
* Specifications at www.trustedcomputinggroup.org
*
* This device driver implements the TPM interface as defined in
* the TCG TPM Interface Spec version 1.2, revision 1.0 and the
* Infineon I2C Protocol Stack Specification v0.20.
*
* It is based on the Linux kernel driver tpm.c from Leendert van
* Dorn, Dave Safford, Reiner Sailer, and Kyleen Hall.
*
* Version: 2.1.1
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2 of the
* License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <stdint.h>
#include <string.h>
#include <types.h>
#include <delay.h>
#include <console/console.h>
#include <arch/byteorder.h>
#include <device/i2c.h>
#include "tpm.h"
/* max. buffer size supported by our tpm */
#ifdef TPM_BUFSIZE
#undef TPM_BUFSIZE
#endif
#define TPM_BUFSIZE 1260
/* Address of the TPM on the I2C bus */
#define TPM_I2C_ADDR 0x20
/* max. number of iterations after i2c NAK */
#define MAX_COUNT 3
#define SLEEP_DURATION 60 /*in usec*/
/* max. number of iterations after i2c NAK for 'long' commands
* we need this especially for sending TPM_READY, since the cleanup after the
* transtion to the ready state may take some time, but it is unpredictable
* how long it will take.
*/
#define MAX_COUNT_LONG 50
#define SLEEP_DURATION_LONG 210 /* in usec */
/* expected value for DIDVID register */
#define TPM_TIS_I2C_DID_VID_9635 0x000b15d1L
#define TPM_TIS_I2C_DID_VID_9645 0x001a15d1L
enum i2c_chip_type {
SLB9635,
SLB9645,
UNKNOWN,
};
static const char * const chip_name[] = {
[SLB9635] = "slb9635tt",
[SLB9645] = "slb9645tt",
[UNKNOWN] = "unknown/fallback to slb9635",
};
/* Structure to store I2C TPM specific stuff */
struct tpm_inf_dev {
unsigned bus;
unsigned int addr;
uint8_t buf[TPM_BUFSIZE + sizeof(uint8_t)]; // max. buffer size + addr
enum i2c_chip_type chip_type;
};
static struct tpm_inf_dev tpm_dev = {
.addr = TPM_I2C_ADDR
};
/*
* iic_tpm_read() - read from TPM register
* @addr: register address to read from
* @buffer: provided by caller
* @len: number of bytes to read
*
* Read len bytes from TPM register and put them into
* buffer (little-endian format, i.e. first byte is put into buffer[0]).
*
* NOTE: TPM is big-endian for multi-byte values. Multi-byte
* values have to be swapped.
*
* Return -EIO on error, 0 on success.
*/
static int iic_tpm_read(uint8_t addr, uint8_t *buffer, size_t len)
{
int rc;
int count;
if (!tpm_dev.bus)
return -1;
if ((tpm_dev.chip_type == SLB9635) || (tpm_dev.chip_type == UNKNOWN)) {
/* slb9635 protocol should work in both cases */
for (count = 0; count < MAX_COUNT; count++) {
rc = i2c_write(tpm_dev.bus, tpm_dev.addr,
0, 0, &addr, 1);
if (rc == 0)
break; /* success, break to skip sleep */
udelay(SLEEP_DURATION);
}
if (rc)
return -rc;
/* After the TPM has successfully received the register address
* it needs some time, thus we're sleeping here again, before
* retrieving the data
*/
for (count = 0; count < MAX_COUNT; count++) {
udelay(SLEEP_DURATION);
rc = i2c_read(tpm_dev.bus, tpm_dev.addr,
0, 0, buffer, len);
if (rc == 0)
break; /* success, break to skip sleep */
}
} else {
/* use a combined read for newer chips
* unfortunately the smbus functions are not suitable due to
* the 32 byte limit of the smbus.
* retries should usually not be needed, but are kept just to
* be safe on the safe side.
*/
for (count = 0; count < MAX_COUNT; count++) {
rc = i2c_read(tpm_dev.bus, tpm_dev.addr,
addr, 1, buffer, len);
if (rc == 0)
break; /* break here to skip sleep */
udelay(SLEEP_DURATION);
}
}
/* take care of 'guard time' */
udelay(SLEEP_DURATION);
if (rc)
return -rc;
return 0;
}
static int iic_tpm_write_generic(uint8_t addr, uint8_t *buffer, size_t len,
unsigned int sleep_time,
uint8_t max_count)
{
int rc = 0;
int count;
if (len > TPM_BUFSIZE) {
printk(BIOS_DEBUG, "%s: Length %d is too large\n", __func__, len);
return -1;
}
/* prepare send buffer */
tpm_dev.buf[0] = addr;
memcpy(&(tpm_dev.buf[1]), buffer, len);
if (!tpm_dev.bus)
return -1;
for (count = 0; count < max_count; count++) {
rc = i2c_write(tpm_dev.bus, tpm_dev.addr, 0, 0,
tpm_dev.buf, len + 1);
if (rc == 0)
break; /* success, break to skip sleep */
udelay(sleep_time);
}
/* take care of 'guard time' */
udelay(SLEEP_DURATION);
if (rc)
return -rc;
return 0;
}
/*
* iic_tpm_write() - write to TPM register
* @addr: register address to write to
* @buffer: containing data to be written
* @len: number of bytes to write
*
* Write len bytes from provided buffer to TPM register (little
* endian format, i.e. buffer[0] is written as first byte).
*
* NOTE: TPM is big-endian for multi-byte values. Multi-byte
* values have to be swapped.
*
* NOTE: use this function instead of the iic_tpm_write_generic function.
*
* Return -EIO on error, 0 on success
*/
static int iic_tpm_write(uint8_t addr, uint8_t *buffer, size_t len)
{
return iic_tpm_write_generic(addr, buffer, len, SLEEP_DURATION,
MAX_COUNT);
}
/*
* This function is needed especially for the cleanup situation after
* sending TPM_READY
* */
static int iic_tpm_write_long(uint8_t addr, uint8_t *buffer, size_t len)
{
return iic_tpm_write_generic(addr, buffer, len, SLEEP_DURATION_LONG,
MAX_COUNT_LONG);
}
#define TPM_HEADER_SIZE 10
enum tis_access {
TPM_ACCESS_VALID = 0x80,
TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
TPM_ACCESS_REQUEST_PENDING = 0x04,
TPM_ACCESS_REQUEST_USE = 0x02,
};
enum tis_status {
TPM_STS_VALID = 0x80,
TPM_STS_COMMAND_READY = 0x40,
TPM_STS_GO = 0x20,
TPM_STS_DATA_AVAIL = 0x10,
TPM_STS_DATA_EXPECT = 0x08,
};
#define TPM_ACCESS(l) (0x0000 | ((l) << 4))
#define TPM_STS(l) (0x0001 | ((l) << 4))
#define TPM_DATA_FIFO(l) (0x0005 | ((l) << 4))
#define TPM_DID_VID(l) (0x0006 | ((l) << 4))
static int check_locality(struct tpm_chip *chip, int loc)
{
uint8_t buf;
int rc;
rc = iic_tpm_read(TPM_ACCESS(loc), &buf, 1);
if (rc < 0)
return rc;
if ((buf & (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) ==
(TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) {
chip->vendor.locality = loc;
return loc;
}
return -1;
}
static void release_locality(struct tpm_chip *chip, int loc, int force)
{
uint8_t buf;
if (iic_tpm_read(TPM_ACCESS(loc), &buf, 1) < 0)
return;
if (force || (buf & (TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID)) ==
(TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID)) {
buf = TPM_ACCESS_ACTIVE_LOCALITY;
iic_tpm_write(TPM_ACCESS(loc), &buf, 1);
}
}
static int request_locality(struct tpm_chip *chip, int loc)
{
uint8_t buf = TPM_ACCESS_REQUEST_USE;
if (check_locality(chip, loc) >= 0)
return loc; /* we already have the locality */
iic_tpm_write(TPM_ACCESS(loc), &buf, 1);
/* wait for burstcount */
int timeout = 2 * 1000; /* 2s timeout */
while (timeout) {
if (check_locality(chip, loc) >= 0)
return loc;
mdelay(TPM_TIMEOUT);
timeout--;
}
return -1;
}
static uint8_t tpm_tis_i2c_status(struct tpm_chip *chip)
{
/* NOTE: since i2c read may fail, return 0 in this case --> time-out */
uint8_t buf;
if (iic_tpm_read(TPM_STS(chip->vendor.locality), &buf, 1) < 0)
return 0;
else
return buf;
}
static void tpm_tis_i2c_ready(struct tpm_chip *chip)
{
/* this causes the current command to be aborted */
uint8_t buf = TPM_STS_COMMAND_READY;
iic_tpm_write_long(TPM_STS(chip->vendor.locality), &buf, 1);
}
static ssize_t get_burstcount(struct tpm_chip *chip)
{
ssize_t burstcnt;
uint8_t buf[3];
/* wait for burstcount */
int timeout = 2 * 1000; /* 2s timeout */
while (timeout) {
/* Note: STS is little endian */
if (iic_tpm_read(TPM_STS(chip->vendor.locality) + 1, buf, 3) < 0)
burstcnt = 0;
else
burstcnt = (buf[2] << 16) + (buf[1] << 8) + buf[0];
if (burstcnt)
return burstcnt;
mdelay(TPM_TIMEOUT);
timeout--;
}
return -1; //EBUSY;
}
static int wait_for_stat(struct tpm_chip *chip, uint8_t mask, int *status)
{
unsigned long timeout = 2 * 1024;
while (timeout) {
*status = tpm_tis_i2c_status(chip);
if ((*status & mask) == mask)
return 0;
mdelay(TPM_TIMEOUT);
timeout--;
}
return -1; //ETIME;
}
static int recv_data(struct tpm_chip *chip, uint8_t *buf, size_t count)
{
size_t size = 0;
ssize_t burstcnt;
int rc;
while (size < count) {
burstcnt = get_burstcount(chip);
/* burstcount < 0 = tpm is busy */
if (burstcnt < 0)
return burstcnt;
/* limit received data to max. left */
if (burstcnt > (count - size))
burstcnt = count - size;
rc = iic_tpm_read(TPM_DATA_FIFO(chip->vendor.locality),
&(buf[size]),
burstcnt);
if (rc == 0)
size += burstcnt;
}
return size;
}
static int tpm_tis_i2c_recv(struct tpm_chip *chip, uint8_t *buf, size_t count)
{
int size = 0;
uint32_t expected;
int status;
if (count < TPM_HEADER_SIZE) {
size = -1; //EIO;
goto out;
}
/* read first 10 bytes, including tag, paramsize, and result */
size = recv_data(chip, buf, TPM_HEADER_SIZE);
if (size < TPM_HEADER_SIZE) {
printk(BIOS_DEBUG, "tpm_tis_i2c_recv: Unable to read header\n");
goto out;
}
memcpy(&expected, buf + TPM_RSP_SIZE_BYTE, sizeof(expected));
expected = be32_to_cpu(expected);
if ((size_t)expected > count) {
size = -1; //EIO;
goto out;
}
size += recv_data(chip, &buf[TPM_HEADER_SIZE],
expected - TPM_HEADER_SIZE);
if (size < expected) {
printk(BIOS_DEBUG, "tpm_tis_i2c_recv: Unable to "
"read remainder of result\n");
size = -1; //ETIME;
goto out;
}
wait_for_stat(chip, TPM_STS_VALID, &status);
if (status & TPM_STS_DATA_AVAIL) { /* retry? */
printk(BIOS_DEBUG, "tpm_tis_i2c_recv: Error left over data\n");
size = -1; //EIO;
goto out;
}
out:
tpm_tis_i2c_ready(chip);
return size;
}
static int tpm_tis_i2c_send(struct tpm_chip *chip, uint8_t *buf, size_t len)
{
int rc, status;
ssize_t burstcnt;
size_t count = 0;
uint8_t sts = TPM_STS_GO;
if (len > TPM_BUFSIZE)
return -1; //E2BIG; /* command is too long for our tpm, sorry */
status = tpm_tis_i2c_status(chip);
if ((status & TPM_STS_COMMAND_READY) == 0) {
tpm_tis_i2c_ready(chip);
if (wait_for_stat(chip, TPM_STS_COMMAND_READY, &status) < 0) {
rc = -1; //ETIME;
goto out_err;
}
}
while (count < len - 1) {
burstcnt = get_burstcount(chip);
/* burstcount < 0 = tpm is busy */
if (burstcnt < 0)
return burstcnt;
if (burstcnt > (len-1-count))
burstcnt = len-1-count;
#ifdef CONFIG_TPM_I2C_BURST_LIMITATION
if (burstcnt > CONFIG_TPM_I2C_BURST_LIMITATION)
burstcnt = CONFIG_TPM_I2C_BURST_LIMITATION;
#endif /* CONFIG_TPM_I2C_BURST_LIMITATION */
rc = iic_tpm_write(TPM_DATA_FIFO(chip->vendor.locality),
&(buf[count]), burstcnt);
if (rc == 0)
count += burstcnt;
wait_for_stat(chip, TPM_STS_VALID, &status);
if ((status & TPM_STS_DATA_EXPECT) == 0) {
rc = -1; //EIO;
goto out_err;
}
}
/* write last byte */
iic_tpm_write(TPM_DATA_FIFO(chip->vendor.locality), &(buf[count]), 1);
wait_for_stat(chip, TPM_STS_VALID, &status);
if ((status & TPM_STS_DATA_EXPECT) != 0) {
rc = -1; //EIO;
goto out_err;
}
/* go and do it */
iic_tpm_write(TPM_STS(chip->vendor.locality), &sts, 1);
return len;
out_err:
tpm_tis_i2c_ready(chip);
return rc;
}
static struct tpm_vendor_specific tpm_tis_i2c = {
.status = tpm_tis_i2c_status,
.recv = tpm_tis_i2c_recv,
.send = tpm_tis_i2c_send,
.cancel = tpm_tis_i2c_ready,
.req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
.req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
.req_canceled = TPM_STS_COMMAND_READY,
};
/* initialisation of i2c tpm */
int tpm_vendor_init(unsigned bus, uint32_t dev_addr)
{
uint32_t vendor;
unsigned int old_addr;
int rc = 0;
struct tpm_chip *chip;
old_addr = tpm_dev.addr;
if (dev_addr != 0)
tpm_dev.addr = dev_addr;
tpm_dev.bus = bus;
chip = tpm_register_hardware(&tpm_tis_i2c);
if (chip < 0) {
rc = -1; //ENODEV;
goto out_err;
}
/* Disable interrupts (not supported) */
chip->vendor.irq = 0;
if (request_locality(chip, 0) != 0) {
rc = -1; //ENODEV;
goto out_err;
}
/* read four bytes from DID_VID register */
if (iic_tpm_read(TPM_DID_VID(0), (uint8_t *)&vendor, 4) < 0) {
rc = -1; //EIO;
goto out_release;
}
if (vendor == TPM_TIS_I2C_DID_VID_9645) {
tpm_dev.chip_type = SLB9645;
} else if (be32_to_cpu(vendor) == TPM_TIS_I2C_DID_VID_9635) {
tpm_dev.chip_type = SLB9635;
} else {
printk(BIOS_DEBUG, "Vendor ID 0x%08x not recognized.\n", vendor);
rc = -1; //ENODEV;
goto out_release;
}
printk(BIOS_DEBUG, "1.2 TPM (chip type %s device-id 0x%X)\n",
chip_name[tpm_dev.chip_type], vendor >> 16);
/*
* A timeout query to TPM can be placed here.
* Standard timeout values are used so far
*/
return 0;
out_release:
release_locality(chip, 0, 1);
out_err:
tpm_dev.addr = old_addr;
return rc;
}
void tpm_vendor_cleanup(struct tpm_chip *chip)
{
release_locality(chip, chip->vendor.locality, 1);
}

2
src/drivers/pc80/tpm.c
View File

@ -33,7 +33,7 @@
#include <arch/io.h> #include <arch/io.h>
#include <arch/byteorder.h> #include <arch/byteorder.h>
#include <console/console.h> #include <console/console.h>
#include <pc80/tpm.h> #include <tpm.h>
#include <arch/early_variables.h> #include <arch/early_variables.h>
#define PREFIX "lpc_tpm: " #define PREFIX "lpc_tpm: "

29
src/include/pc80/tpm.h
View File

@ -1,29 +0,0 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2011 The Chromium OS Authors. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef TPM_H_
#define TPM_H_
int tis_init(void);
int tis_open(void);
int tis_close(void);
int tis_sendrecv(const u8 *sendbuf, size_t send_size, u8 *recvbuf,
size_t *recv_len);
#endif /* TPM_H_ */

25
src/drivers/i2c/tpm/tis.h → src/include/tpm.h
View File

@ -1,13 +1,11 @@
/* /*
* This file is part of the coreboot project.
*
* Copyright 2011 Google Inc. * Copyright 2011 Google Inc.
* *
* See file CREDITS for list of people who contributed to this * This program is free software; you can redistribute it and/or modify
* project. * it under the terms of the GNU General Public License as published by
* * the Free Software Foundation; version 2 of the License.
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
* *
* This program is distributed in the hope that it will be useful, * This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of * but WITHOUT ANY WARRANTY; without even the implied warranty of
@ -16,18 +14,15 @@
* *
* You should have received a copy of the GNU General Public License * You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software * along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
* MA 02111-1307 USA
*/ */
#ifndef __DRIVERS_TPM_TPM_H__ #ifndef TPM_H_
#define __DRIVERS_TPM_TPM_H__ #define TPM_H_
#include <stddef.h> #include <stddef.h>
#include <stdint.h> #include <stdint.h>
void tis_set_i2c_bus(unsigned _bus);
/* /*
* tis_init() * tis_init()
* *
@ -68,7 +63,7 @@ int tis_close(void);
* Returns 0 on success (and places the number of response bytes at recv_len) * Returns 0 on success (and places the number of response bytes at recv_len)
* or -1 on failure. * or -1 on failure.
*/ */
int tis_sendrecv(const uint8_t *sendbuf, size_t send_size, uint8_t *recvbuf, int tis_sendrecv(const u8 *sendbuf, size_t send_size, u8 *recvbuf,
size_t *recv_len); size_t *recv_len);
#endif /* __DRIVERS_TPM_TPM_H__ */ #endif /* TPM_H_ */

2
src/vendorcode/google/chromeos/vboot.c
View File

@ -20,7 +20,7 @@
#include <types.h> #include <types.h>
#include <console/console.h> #include <console/console.h>
#include <arch/acpi.h> #include <arch/acpi.h>
#include <pc80/tpm.h> #include <tpm.h>
#include <reset.h> #include <reset.h>
#include "chromeos.h" #include "chromeos.h"

2
src/vendorcode/google/chromeos/vboot_loader.c
View File

@ -24,7 +24,7 @@
#include <cbmem.h> #include <cbmem.h>
#include <console/console.h> #include <console/console.h>
#include <console/vtxprintf.h> #include <console/vtxprintf.h>
#include <pc80/tpm.h> #include <tpm.h>
#include <reset.h> #include <reset.h>
#include <ramstage_loader.h> #include <ramstage_loader.h>
#include <romstage_handoff.h> #include <romstage_handoff.h>