Revert "security/tpm/: turn tis_{init,open} into tis_probe"

This reverts commit d43154486d.

From CB:68991: This causes CraterLake boot up process to die.
Investigation in progress.

Change-Id: I4a6c11b0e638a891108fe230bdaea92d5fbca020
Signed-off-by: Sergii Dmytruk <sergii.dmytruk@3mdeb.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71205
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Tested-by: siemens-bot
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/drivers/i2c/tpm/cr50.c

@@ -484,6 +484,7 @@ int tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr)
                 cr50_set_board_cfg();
 	}
 
+	chip->is_open = 1;
 	return 0;
 }
 

src/drivers/i2c/tpm/tis.c

@@ -19,6 +19,32 @@ static struct tpm_chip chip;
 #define TPM_CMD_COUNT_BYTE 2
 #define TPM_CMD_ORDINAL_BYTE 6
 
+int tis_open(void)
+{
+	int rc;
+
+	if (chip.is_open) {
+		printk(BIOS_DEBUG, "%s() called twice.\n", __func__);
+		return -1;
+	}
+
+	rc = tpm_vendor_init(&chip, CONFIG_DRIVER_TPM_I2C_BUS,
+			     CONFIG_DRIVER_TPM_I2C_ADDR);
+	if (rc < 0)
+		chip.is_open = 0;
+
+	if (rc)
+		return -1;
+
+	return 0;
+}
+
+int tis_init(void)
+{
+	return tpm_vendor_probe(CONFIG_DRIVER_TPM_I2C_BUS,
+				CONFIG_DRIVER_TPM_I2C_ADDR);
+}
+
 static ssize_t tpm_transmit(const uint8_t *sbuf, size_t sbufsiz, void *rbuf,
 			size_t rbufsiz)
 {
@@ -81,8 +107,8 @@ out:
 	return rc;
 }
 
-static int i2c_tpm_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
-			    uint8_t *recvbuf, size_t *rbuf_len)
+int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
+		uint8_t *recvbuf, size_t *rbuf_len)
 {
 	ASSERT(sbuf_size >= 10);
 
@@ -118,14 +144,3 @@ static int i2c_tpm_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
 
 	return 0;
 }
-
-tis_sendrecv_fn tis_probe(void)
-{
-	if (tpm_vendor_probe(CONFIG_DRIVER_TPM_I2C_BUS, CONFIG_DRIVER_TPM_I2C_ADDR))
-		return NULL;
-
-	if (tpm_vendor_init(&chip, CONFIG_DRIVER_TPM_I2C_BUS, CONFIG_DRIVER_TPM_I2C_ADDR))
-		return NULL;
-
-	return &i2c_tpm_sendrecv;
-}

src/drivers/i2c/tpm/tis_atmel.c

@@ -22,8 +22,18 @@ struct tpm_output_header {
 	uint32_t return_code;
 } __packed;
 
-static int i2c_tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
-			    uint8_t *recvbuf, size_t *rbuf_len)
+int tis_open(void)
+{
+	return 0;
+}
+
+int tis_init(void)
+{
+	return 0;
+}
+
+int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
+		uint8_t *recvbuf, size_t *rbuf_len)
 {
 	size_t hdr_bytes;
 	struct tpm_output_header *header;
@@ -102,8 +112,3 @@ static int i2c_tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
 	/* Successful transfer */
 	return 0;
 }
-
-tis_sendrecv_fn tis_probe(void)
-{
-	return &i2c_tis_sendrecv;
-}

src/drivers/i2c/tpm/tpm.c

@@ -507,6 +507,8 @@ int tpm_vendor_init(struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr)
 	tpm_dev.sleep_short = SLEEP_DURATION;
 	tpm_dev.sleep_long = SLEEP_DURATION_LONG;
 
+	chip->is_open = 1;
+
 	chip->req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID;
 	chip->req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID;
 	chip->req_canceled = TPM_STS_COMMAND_READY;

src/drivers/i2c/tpm/tpm.h

@@ -38,6 +38,7 @@ enum tpm_timeout {
 #define	TPM_DID_VID(l)			(0x0006 | ((l) << 4))
 
 struct tpm_chip {
+	int is_open;
 	uint8_t req_complete_mask;
 	uint8_t req_complete_val;
 	uint8_t req_canceled;