70 	struct tpm_chip *chip;  member
280 static int check_locality(struct tpm_chip *chip, int loc)  in check_locality()  argument
291 		chip->vendor.locality = loc;  in check_locality()
299 static void release_locality(struct tpm_chip *chip, int loc, int force)  in release_locality()  argument
312 static int request_locality(struct tpm_chip *chip, int loc)  in request_locality()  argument
317 	if (check_locality(chip, loc) >= 0)  in request_locality()
323 	stop = jiffies + chip->vendor.timeout_a;  in request_locality()
325 		if (check_locality(chip, loc) >= 0)  in request_locality()
333 static u8 tpm_tis_i2c_status(struct tpm_chip *chip)  in tpm_tis_i2c_status()  argument
340 		if (iic_tpm_read(TPM_STS(chip->vendor.locality), &buf, 1) < 0)  in tpm_tis_i2c_status()
350 static void tpm_tis_i2c_ready(struct tpm_chip *chip)  in tpm_tis_i2c_ready()  argument
354 	iic_tpm_write_long(TPM_STS(chip->vendor.locality), &buf, 1);  in tpm_tis_i2c_ready()
357 static ssize_t get_burstcount(struct tpm_chip *chip)  in get_burstcount()  argument
365 	stop = jiffies + chip->vendor.timeout_d;  in get_burstcount()
368 		if (iic_tpm_read(TPM_STS(chip->vendor.locality)+1, buf, 3) < 0)  in get_burstcount()
381 static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,  in wait_for_stat()  argument
387 	*status = tpm_tis_i2c_status(chip);  in wait_for_stat()
395 		*status = tpm_tis_i2c_status(chip);  in wait_for_stat()
404 static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)  in recv_data()  argument
412 		burstcnt = get_burstcount(chip);  in recv_data()
422 		rc = iic_tpm_read(TPM_DATA_FIFO(chip->vendor.locality),  in recv_data()
436 static int tpm_tis_i2c_recv(struct tpm_chip *chip, u8 *buf, size_t count)  in tpm_tis_i2c_recv()  argument
447 	size = recv_data(chip, buf, TPM_HEADER_SIZE);  in tpm_tis_i2c_recv()
449 		dev_err(chip->pdev, "Unable to read header\n");  in tpm_tis_i2c_recv()
459 	size += recv_data(chip, &buf[TPM_HEADER_SIZE],  in tpm_tis_i2c_recv()
462 		dev_err(chip->pdev, "Unable to read remainder of result\n");  in tpm_tis_i2c_recv()
467 	wait_for_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c, &status);  in tpm_tis_i2c_recv()
469 		dev_err(chip->pdev, "Error left over data\n");  in tpm_tis_i2c_recv()
475 	tpm_tis_i2c_ready(chip);  in tpm_tis_i2c_recv()
480 	release_locality(chip, chip->vendor.locality, 0);  in tpm_tis_i2c_recv()
484 static int tpm_tis_i2c_send(struct tpm_chip *chip, u8 *buf, size_t len)  in tpm_tis_i2c_send()  argument
495 	if (request_locality(chip, 0) < 0)  in tpm_tis_i2c_send()
498 	status = tpm_tis_i2c_status(chip);  in tpm_tis_i2c_send()
500 		tpm_tis_i2c_ready(chip);  in tpm_tis_i2c_send()
502 		    (chip, TPM_STS_COMMAND_READY,  in tpm_tis_i2c_send()
503 		     chip->vendor.timeout_b, &status) < 0) {  in tpm_tis_i2c_send()
510 		burstcnt = get_burstcount(chip);  in tpm_tis_i2c_send()
519 		rc = iic_tpm_write(TPM_DATA_FIFO(chip->vendor.locality),  in tpm_tis_i2c_send()
532 		wait_for_stat(chip, TPM_STS_VALID,  in tpm_tis_i2c_send()
533 			      chip->vendor.timeout_c, &status);  in tpm_tis_i2c_send()
542 	iic_tpm_write(TPM_DATA_FIFO(chip->vendor.locality), &(buf[count]), 1);  in tpm_tis_i2c_send()
543 	wait_for_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c, &status);  in tpm_tis_i2c_send()
550 	iic_tpm_write(TPM_STS(chip->vendor.locality), &sts, 1);  in tpm_tis_i2c_send()
554 	tpm_tis_i2c_ready(chip);  in tpm_tis_i2c_send()
559 	release_locality(chip, chip->vendor.locality, 0);  in tpm_tis_i2c_send()
563 static bool tpm_tis_i2c_req_canceled(struct tpm_chip *chip, u8 status)  in tpm_tis_i2c_req_canceled()  argument
582 	struct tpm_chip *chip;  in tpm_tis_i2c_init()  local
584 	chip = tpmm_chip_alloc(dev, &tpm_tis_i2c);  in tpm_tis_i2c_init()
585 	if (IS_ERR(chip))  in tpm_tis_i2c_init()
586 		return PTR_ERR(chip);  in tpm_tis_i2c_init()
589 	chip->vendor.irq = 0;  in tpm_tis_i2c_init()
592 	chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);  in tpm_tis_i2c_init()
593 	chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);  in tpm_tis_i2c_init()
594 	chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);  in tpm_tis_i2c_init()
595 	chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);  in tpm_tis_i2c_init()
597 	if (request_locality(chip, 0) != 0) {  in tpm_tis_i2c_init()
622 	INIT_LIST_HEAD(&chip->vendor.list);  in tpm_tis_i2c_init()
623 	tpm_dev.chip = chip;  in tpm_tis_i2c_init()
625 	tpm_get_timeouts(chip);  in tpm_tis_i2c_init()
626 	tpm_do_selftest(chip);  in tpm_tis_i2c_init()
628 	return tpm_chip_register(chip);  in tpm_tis_i2c_init()
630 	release_locality(chip, chip->vendor.locality, 1);  in tpm_tis_i2c_init()
699 	struct tpm_chip *chip = tpm_dev.chip;  in tpm_tis_i2c_remove()  local
701 	tpm_chip_unregister(chip);  in tpm_tis_i2c_remove()
702 	release_locality(chip, chip->vendor.locality, 1);  in tpm_tis_i2c_remove()