static ssize_t pcrs_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
cap_t cap;
u8 digest[TPM_DIGEST_SIZE];
ssize_t rc;
int i, j, num_pcrs;
char *str = buf;
struct tpm_chip *chip = to_tpm_chip(dev);
rc = tpm_getcap(chip, TPM_CAP_PROP_PCR, &cap,
"attempting to determine the number of PCRS");
if (rc)
return 0;
num_pcrs = be32_to_cpu(cap.num_pcrs);
for (i = 0; i < num_pcrs; i++) {
rc = tpm_pcr_read_dev(chip, i, digest);
if (rc)
break;
str += sprintf(str, "PCR-%02d: ", i);
for (j = 0; j < TPM_DIGEST_SIZE; j++)
str += sprintf(str, "%02X ", digest[j]);
str += sprintf(str, "\n");
}
return str - buf;
}
static ssize_t caps_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct tpm_chip *chip = to_tpm_chip(dev);
cap_t cap;
ssize_t rc;
char *str = buf;
rc = tpm_getcap(chip, TPM_CAP_PROP_MANUFACTURER, &cap,
"attempting to determine the manufacturer");
if (rc)
return 0;
str += sprintf(str, "Manufacturer: 0x%x\n",
be32_to_cpu(cap.manufacturer_id));
/* Try to get a TPM version 1.2 TPM_CAP_VERSION_INFO */
rc = tpm_getcap(chip, CAP_VERSION_1_2, &cap,
"attempting to determine the 1.2 version");
if (!rc) {
str += sprintf(str,
"TCG version: %d.%d\nFirmware version: %d.%d\n",
cap.tpm_version_1_2.Major,
cap.tpm_version_1_2.Minor,
cap.tpm_version_1_2.revMajor,
cap.tpm_version_1_2.revMinor);
} else {
/* Otherwise just use TPM_STRUCT_VER */
rc = tpm_getcap(chip, CAP_VERSION_1_1, &cap,
"attempting to determine the 1.1 version");
if (rc)
return 0;
str += sprintf(str,
"TCG version: %d.%d\nFirmware version: %d.%d\n",
cap.tpm_version.Major,
cap.tpm_version.Minor,
cap.tpm_version.revMajor,
cap.tpm_version.revMinor);
}
return str - buf;
}
static ssize_t temp_deactivated_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
cap_t cap;
ssize_t rc;
rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_FLAG_VOL, &cap,
"attempting to determine the temporary state");
if (rc)
return 0;
rc = sprintf(buf, "%d\n", cap.stclear_flags.deactivated);
return rc;
}
static ssize_t owned_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
cap_t cap;
ssize_t rc;
rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_PROP_OWNER, &cap,
"attempting to determine the owner state");
if (rc)
return 0;
rc = sprintf(buf, "%d\n", cap.owned);
return rc;
}
static ssize_t active_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
cap_t cap;
ssize_t rc;
rc = tpm_getcap(to_tpm_chip(dev), TPM_CAP_FLAG_PERM, &cap,
"attempting to determine the permanent active state");
if (rc)
return 0;
rc = sprintf(buf, "%d\n", !cap.perm_flags.deactivated);
return rc;
}
static ssize_t enabled_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
cap_t cap;
ssize_t rc;
rc = tpm_getcap(dev, TPM_CAP_FLAG_PERM, &cap,
"attempting to determine the permanent enabled state");
if (rc)
return 0;
rc = sprintf(buf, "%d\n", !cap.perm_flags.disable);
return rc;
}
