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Diffstat (limited to 'src/drivers/spi/tpm')
-rw-r--r--src/drivers/spi/tpm/tpm.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/src/drivers/spi/tpm/tpm.c b/src/drivers/spi/tpm/tpm.c
index b02fc5fbea..4de62d95c4 100644
--- a/src/drivers/spi/tpm/tpm.c
+++ b/src/drivers/spi/tpm/tpm.c
@@ -32,6 +32,7 @@
#define TPM_DATA_FIFO_REG (TPM_LOCALITY_0_SPI_BASE + 0x24)
#define TPM_DID_VID_REG (TPM_LOCALITY_0_SPI_BASE + 0xf00)
#define TPM_RID_REG (TPM_LOCALITY_0_SPI_BASE + 0xf04)
+#define TPM_FW_VER (TPM_LOCALITY_0_SPI_BASE + 0xf90)
/* SPI Interface descriptor used by the driver. */
struct tpm_spi_if {
@@ -355,6 +356,36 @@ int tpm2_init(struct spi_slave *spi_if)
printk(BIOS_INFO, "Connected to device vid:did:rid of %4.4x:%4.4x:%2.2x\n",
tpm_info.vendor_id, tpm_info.device_id, tpm_info.revision);
+ /* Let's report device FW version if available. */
+ if (tpm_info.vendor_id == 0x1ae0) {
+ int chunk_count = 0;
+ uint32_t chunk = 0;
+ char vstr[sizeof(chunk) + 1]; /* room for 4 chars + zero */
+
+ printk(BIOS_INFO, "Firmware version: ");
+
+ /*
+ * Does not really matter what's written, this just makes sure
+ * the version is reported from the beginning.
+ */
+ tpm2_write_reg(TPM_FW_VER, &chunk, sizeof(chunk));
+
+ /* Print it out in 4 byte chunks. */
+ vstr[sizeof(vstr) - 1] = 0;
+ do {
+ tpm2_read_reg(TPM_FW_VER, vstr, sizeof(chunk));
+ printk(BIOS_INFO, "%s", vstr);
+
+ /*
+ * While string is not over, and no more than 200
+ * characters.
+ * This is likely result in one extra printk()
+ * invocation with an empty string, not a big deal.
+ */
+ } while (vstr[0] && (chunk_count++ < (200 / sizeof(chunk))));
+
+ printk(BIOS_INFO, "\n");
+ }
return 0;
}