summaryrefslogtreecommitdiff
path: root/drivers/char/tpm/tpm_ppi.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/char/tpm/tpm_ppi.c')
-rw-r--r--drivers/char/tpm/tpm_ppi.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c
index 942a2f79e9da..75e7a856177c 100644
--- a/drivers/char/tpm/tpm_ppi.c
+++ b/drivers/char/tpm/tpm_ppi.c
@@ -120,9 +120,10 @@ static ssize_t tpm_store_ppi_request(struct device *dev,
u32 req;
u64 ret;
int func = TPM_PPI_FN_SUBREQ;
- union acpi_object *obj, tmp;
- union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
+ union acpi_object *obj, tmp[2];
+ union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(2, tmp);
struct tpm_chip *chip = to_tpm_chip(dev);
+ u64 rev = TPM_PPI_REVISION_ID_1;
/*
* the function to submit TPM operation request to pre-os environment
@@ -139,20 +140,29 @@ static ssize_t tpm_store_ppi_request(struct device *dev,
* string/package type. For PPI version 1.0 and 1.1, use buffer type
* for compatibility, and use package type since 1.2 according to spec.
*/
- if (strcmp(chip->ppi_version, "1.2") < 0) {
+ if (strcmp(chip->ppi_version, "1.3") == 0) {
+ if (sscanf(buf, "%llu %llu", &tmp[0].integer.value,
+ &tmp[1].integer.value) != 2)
+ goto ppi12;
+ rev = TPM_PPI_REVISION_ID_2;
+ tmp[0].type = ACPI_TYPE_INTEGER;
+ tmp[1].type = ACPI_TYPE_INTEGER;
+ } else if (strcmp(chip->ppi_version, "1.2") < 0) {
if (sscanf(buf, "%d", &req) != 1)
return -EINVAL;
argv4.type = ACPI_TYPE_BUFFER;
argv4.buffer.length = sizeof(req);
argv4.buffer.pointer = (u8 *)&req;
} else {
- tmp.type = ACPI_TYPE_INTEGER;
- if (sscanf(buf, "%llu", &tmp.integer.value) != 1)
+ppi12:
+ argv4.package.count = 1;
+ tmp[0].type = ACPI_TYPE_INTEGER;
+ if (sscanf(buf, "%llu", &tmp[0].integer.value) != 1)
return -EINVAL;
}
obj = tpm_eval_dsm(chip->acpi_dev_handle, func, ACPI_TYPE_INTEGER,
- &argv4, TPM_PPI_REVISION_ID_1);
+ &argv4, rev);
if (!obj) {
return -ENXIO;
} else {