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tpm: Add Ti50 OpenTitan DID_VID

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The OpenTitan HW implements the same firmware interface as the Ti50
H1D3C hardware variant; it just has a different DID_VID. Allow this new
DID_VID to be recognized correctly.

BUG=b:324940153

Change-Id: Iaacf6d88bc6067948756c465aac1cd8b24ecae1f
Signed-off-by: Jett Rink <jettrink@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/83033
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
This commit is contained in:
Jett Rink
2024-06-10 09:31:14 -06:00
committed by Felix Held
parent ce9562f662
commit d41ad724cd
3 changed files with 7 additions and 3 deletions
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6
src/drivers/i2c/tpm/cr50.c
View File

@ -34,7 +34,8 @@
#define CR50_TIMEOUT_LONG_MS 2000 /* Long timeout while waiting for TPM */
#define CR50_TIMEOUT_SHORT_MS 2 /* Short timeout during transactions */
#define CR50_DID_VID 0x00281ae0L
#define TI50_DID_VID 0x504a6666L
#define TI50_DT_DID_VID 0x504a6666L
#define TI50_OT_DID_VID 0x50666666L
struct tpm_inf_dev {
int bus;
@ -449,7 +450,8 @@ static tpm_result_t cr50_i2c_probe(uint32_t *did_vid)
rc = cr50_i2c_read(TPM_DID_VID(0), (uint8_t *)did_vid, 4);
/* Exit once DID and VID verified */
if (!rc && (*did_vid == CR50_DID_VID || *did_vid == TI50_DID_VID)) {
if (!rc && (*did_vid == CR50_DID_VID || *did_vid == TI50_DT_DID_VID ||
*did_vid == TI50_OT_DID_VID)) {
printk(BIOS_INFO, "done! DID_VID 0x%08x\n", *did_vid);
return TPM_SUCCESS;
}

1
src/drivers/spi/tpm/tpm.c
View File

@ -391,6 +391,7 @@ static enum cb_err tpm2_claim_locality(void)
static const uint32_t supported_did_vids[] = {
0x00281ae0, /* H1 based Cr50 security chip. */
0x504a6666, /* H1D3C based Ti50 security chip. */
0x50666666, /* OpenTitan based Ti50 security chip. */
0x0000104a /* ST33HTPH2E32 */
};

3
src/drivers/tpm/cr50.c
View File

@ -8,7 +8,8 @@
#include <types.h>
#define CR50_DID_VID 0x00281ae0L
#define TI50_DID_VID 0x504a6666L
#define TI50_DT_DID_VID 0x504a6666L
#define TI50_OT_DID_VID 0x50666666L
#define CR50_BOARD_CFG_LOCKBIT_MASK 0x80000000U
#define CR50_BOARD_CFG_FEATUREBITS_MASK 0x3FFFFFFFU