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drivers/i2c/tpm: Add TPM (TIS) debugging support 

Add debugging support for the TIS transactions for the I2C TPM chips.

TEST=Build and run on reef

Change-Id: Ibc7e26fca781316d625f4da080f34749f18e4f9b
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18799
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
This commit is contained in:
Lee Leahy 2017-01-08 11:38:14 -08:00
parent 52ab30b13b
commit e0668e4e1f
2 changed files with 24 additions and 1 deletions
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5
src/drivers/i2c/tpm/Kconfig
View File

@ -39,3 +39,8 @@ config DRIVER_I2C_TPM_ACPI
bool "Generate I2C TPM ACPI device"
default y if ARCH_X86 && I2C_TPM
default n
config DRIVER_TPM_DISPLAY_TIS_BYTES
bool "TPM: Display the TIS transactions to I2C TPM chip"
default n
depends on I2C_TPM

20
src/drivers/i2c/tpm/tis.c
View File

@ -17,9 +17,11 @@
#include <stdint.h>
#include <string.h>
#include <assert.h>
#include <commonlib/endian.h>
#include <delay.h>
#include <device/i2c.h>
#include <endian.h>
#include <lib.h>
#include <tpm.h>
#include "tpm.h"
#include <timer.h>
@ -144,11 +146,19 @@ int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
{
uint8_t buf[TPM_BUFSIZE];
ASSERT(sbuf_size >= 10);
if (sizeof(buf) < sbuf_size)
return -1;
memcpy(buf, sendbuf, sbuf_size);
/* Display the TPM command */
if (IS_ENABLED(CONFIG_DRIVER_TPM_DISPLAY_TIS_BYTES)) {
printk(BIOS_DEBUG, "TPM Command: 0x%08x\n",
read_at_be32(sendbuf, sizeof(uint16_t)
+ sizeof(uint32_t)));
hexdump(sendbuf, sbuf_size);
}
memcpy(buf, sendbuf, sbuf_size);
int len = tpm_transmit(buf, sbuf_size);
if (len < 10) {
@ -164,5 +174,13 @@ int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
memcpy(recvbuf, buf, len);
*rbuf_len = len;
/* 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);
}
return 0;
}