d44221f9c8
Its spreading copies got out of sync. And as it is not a standard header but used in commonlib code, it belongs into commonlib. While we are at it, always include it via GCC's `-include` switch. Some Windows and BSD quirk handling went into the util copies. We always guard from redefinitions now to prevent further issues. Change-Id: I850414e6db1d799dce71ff2dc044e6a000ad2552 Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/28927 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
133 lines
3.3 KiB
C
133 lines
3.3 KiB
C
/*
|
|
* Copyright (C) 2017 Intel Corporation
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <arch/early_variables.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include <commonlib/endian.h>
|
|
#include <console/console.h>
|
|
#include <delay.h>
|
|
#include <device/i2c_simple.h>
|
|
#include <endian.h>
|
|
#include <lib.h>
|
|
#include <security/tpm/tis.h>
|
|
#include <timer.h>
|
|
|
|
#define RECV_TIMEOUT (1 * 1000) /* 1 second */
|
|
#define XMIT_TIMEOUT (1 * 1000) /* 1 second */
|
|
#define SLEEP_DURATION 1000 /* microseconds */
|
|
|
|
struct tpm_output_header {
|
|
uint16_t tag;
|
|
uint32_t length;
|
|
uint32_t return_code;
|
|
} __packed;
|
|
|
|
int tis_open(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int tis_close(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int tis_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
|
|
uint8_t *recvbuf, size_t *rbuf_len)
|
|
{
|
|
size_t hdr_bytes;
|
|
struct tpm_output_header *header;
|
|
size_t max_recv_bytes;
|
|
size_t recv_bytes;
|
|
int status;
|
|
struct stopwatch sw;
|
|
|
|
ASSERT(sbuf_size >= 10);
|
|
if (IS_ENABLED(CONFIG_DRIVER_TPM_DISPLAY_TIS_BYTES)) {
|
|
/* Display the TPM command */
|
|
if (sbuf_size >= 10)
|
|
printk(BIOS_DEBUG, "TPM Command: 0x%08x\n",
|
|
read_at_be32(sendbuf, sizeof(uint16_t)
|
|
+ sizeof(uint32_t)));
|
|
hexdump(sendbuf, sbuf_size);
|
|
}
|
|
|
|
/* Send the command to the TPM */
|
|
stopwatch_init_msecs_expire(&sw, XMIT_TIMEOUT);
|
|
while (1) {
|
|
status = i2c_write_raw(CONFIG_DRIVER_TPM_I2C_BUS,
|
|
CONFIG_DRIVER_TPM_I2C_ADDR, (uint8_t *)sendbuf,
|
|
sbuf_size);
|
|
if ((status < 0) && (!stopwatch_expired(&sw)))
|
|
continue;
|
|
if (status < 0)
|
|
return status;
|
|
break;
|
|
}
|
|
|
|
/* Read the TPM response header */
|
|
max_recv_bytes = *rbuf_len;
|
|
ASSERT(max_recv_bytes >= sizeof(*header));
|
|
hdr_bytes = sizeof(*header);
|
|
header = (struct tpm_output_header *)recvbuf;
|
|
stopwatch_init_msecs_expire(&sw, RECV_TIMEOUT);
|
|
do {
|
|
status = i2c_read_raw(CONFIG_DRIVER_TPM_I2C_BUS,
|
|
CONFIG_DRIVER_TPM_I2C_ADDR, recvbuf, hdr_bytes);
|
|
if (status > 0)
|
|
break;
|
|
udelay(SLEEP_DURATION);
|
|
} while (!stopwatch_expired(&sw));
|
|
if (status != sizeof(*header))
|
|
return -1;
|
|
|
|
/* Determine the number of bytes remaining */
|
|
recv_bytes = min(be32_to_cpu(*(uint32_t *)&header->length),
|
|
max_recv_bytes);
|
|
|
|
/* Determine if there is additional response data */
|
|
if (recv_bytes > hdr_bytes) {
|
|
/* Display the TPM response */
|
|
if (IS_ENABLED(CONFIG_DRIVER_TPM_DISPLAY_TIS_BYTES))
|
|
hexdump(recvbuf, hdr_bytes);
|
|
|
|
/* Read the full TPM response */
|
|
status = i2c_read_raw(CONFIG_DRIVER_TPM_I2C_BUS,
|
|
CONFIG_DRIVER_TPM_I2C_ADDR, recvbuf, recv_bytes);
|
|
if (status < 0)
|
|
return status;
|
|
}
|
|
|
|
/* Return the number of bytes received */
|
|
*rbuf_len = status;
|
|
|
|
/* Display the TPM response */
|
|
if (IS_ENABLED(CONFIG_DRIVER_TPM_DISPLAY_TIS_BYTES)) {
|
|
printk(BIOS_DEBUG, "TPM Response: 0x%08x\n",
|
|
read_at_be32(recvbuf, sizeof(uint16_t)
|
|
+ sizeof(uint32_t)));
|
|
hexdump(recvbuf, *rbuf_len);
|
|
}
|
|
|
|
/* Successful transfer */
|
|
return 0;
|
|
}
|