1 files changed, 0 insertions, 578 deletions
diff --git a/src/drivers/i2c/tpm/tpm_tis_i2c.c b/src/drivers/i2c/tpm/tpm_tis_i2c.c
deleted file mode 100644
index 008fac6e8f..0000000000
--- a/src/drivers/i2c/tpm/tpm_tis_i2c.c
+++ /dev/null
@@ -1,578 +0,0 @@
-/*
- * Copyright (C) 2011 Infineon Technologies
- *
- * Authors:
- * Peter Huewe <huewe.external@infineon.com>
- *
- * Description:
- * Device driver for TCG/TCPA TPM (trusted platform module).
- * Specifications at www.trustedcomputinggroup.org
- *
- * This device driver implements the TPM interface as defined in
- * the TCG TPM Interface Spec version 1.2, revision 1.0 and the
- * Infineon I2C Protocol Stack Specification v0.20.
- *
- * It is based on the Linux kernel driver tpm.c from Leendert van
- * Dorn, Dave Safford, Reiner Sailer, and Kyleen Hall.
- *
- * Version: 2.1.1
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation, version 2 of the
- * License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <stdint.h>
-#include <string.h>
-#include <types.h>
-#include <delay.h>
-#include <console/console.h>
-#include <arch/byteorder.h>
-#include <device/i2c.h>
-#include "tpm.h"
-
-/* max. buffer size supported by our tpm */
-#ifdef TPM_BUFSIZE
-#undef TPM_BUFSIZE
-#endif
-#define TPM_BUFSIZE 1260
-/* Address of the TPM on the I2C bus */
-#define TPM_I2C_ADDR 0x20
-/* max. number of iterations after i2c NAK */
-#define MAX_COUNT 3
-
-#define SLEEP_DURATION 60 /*in usec*/
-
-/* max. number of iterations after i2c NAK for 'long' commands
- * we need this especially for sending TPM_READY, since the cleanup after the
- * transtion to the ready state may take some time, but it is unpredictable
- * how long it will take.
- */
-#define MAX_COUNT_LONG 50
-
-#define SLEEP_DURATION_LONG 210 /* in usec */
-
-/* expected value for DIDVID register */
-#define TPM_TIS_I2C_DID_VID_9635 0x000b15d1L
-#define TPM_TIS_I2C_DID_VID_9645 0x001a15d1L
-
-enum i2c_chip_type {
-	SLB9635,
-	SLB9645,
-	UNKNOWN,
-};
-
-static const char * const chip_name[] = {
-	[SLB9635] = "slb9635tt",
-	[SLB9645] = "slb9645tt",
-	[UNKNOWN] = "unknown/fallback to slb9635",
-};
-
-/* Structure to store I2C TPM specific stuff */
-struct tpm_inf_dev {
-	unsigned bus;
-	unsigned int addr;
-	uint8_t buf[TPM_BUFSIZE + sizeof(uint8_t)]; // max. buffer size + addr
-	enum i2c_chip_type chip_type;
-};
-
-static struct tpm_inf_dev tpm_dev = {
-	.addr = TPM_I2C_ADDR
-};
-
-/*
- * iic_tpm_read() - read from TPM register
- * @addr: register address to read from
- * @buffer: provided by caller
- * @len: number of bytes to read
- *
- * Read len bytes from TPM register and put them into
- * buffer (little-endian format, i.e. first byte is put into buffer[0]).
- *
- * NOTE: TPM is big-endian for multi-byte values. Multi-byte
- * values have to be swapped.
- *
- * Return -EIO on error, 0 on success.
- */
-static int iic_tpm_read(uint8_t addr, uint8_t *buffer, size_t len)
-{
-	int rc;
-	int count;
-
-	if (!tpm_dev.bus)
-		return -1;
-	if ((tpm_dev.chip_type == SLB9635) || (tpm_dev.chip_type == UNKNOWN)) {
-		/* slb9635 protocol should work in both cases */
-		for (count = 0; count < MAX_COUNT; count++) {
-			rc = i2c_write(tpm_dev.bus, tpm_dev.addr,
-						0, 0, &addr, 1);
-			if (rc == 0)
-				break;  /* success, break to skip sleep */
-
-			udelay(SLEEP_DURATION);
-		}
-
-		if (rc)
-			return -rc;
-
-		/* After the TPM has successfully received the register address
-		 * it needs some time, thus we're sleeping here again, before
-		 * retrieving the data
-		 */
-		for (count = 0; count < MAX_COUNT; count++) {
-			udelay(SLEEP_DURATION);
-			rc = i2c_read(tpm_dev.bus, tpm_dev.addr,
-					       0, 0, buffer, len);
-			if (rc == 0)
-				break;  /* success, break to skip sleep */
-
-		}
-	} else {
-		/* use a combined read for newer chips
-		 * unfortunately the smbus functions are not suitable due to
-		 * the 32 byte limit of the smbus.
-		 * retries should usually not be needed, but are kept just to
-		 * be safe on the safe side.
-		 */
-		for (count = 0; count < MAX_COUNT; count++) {
-			rc = i2c_read(tpm_dev.bus, tpm_dev.addr,
-					       addr, 1, buffer, len);
-			if (rc == 0)
-				break;  /* break here to skip sleep */
-			udelay(SLEEP_DURATION);
-		}
-	}
-
-	/* take care of 'guard time' */
-	udelay(SLEEP_DURATION);
-	if (rc)
-		return -rc;
-
-	return 0;
-}
-
-static int iic_tpm_write_generic(uint8_t addr, uint8_t *buffer, size_t len,
-				unsigned int sleep_time,
-				uint8_t max_count)
-{
-	int rc = 0;
-	int count;
-
-	if (len > TPM_BUFSIZE) {
-		printk(BIOS_DEBUG, "%s: Length %d is too large\n", __func__, len);
-		return -1;
-	}
-
-	/* prepare send buffer */
-	tpm_dev.buf[0] = addr;
-	memcpy(&(tpm_dev.buf[1]), buffer, len);
-
-	if (!tpm_dev.bus)
-		return -1;
-	for (count = 0; count < max_count; count++) {
-		rc = i2c_write(tpm_dev.bus, tpm_dev.addr, 0, 0,
-					tpm_dev.buf, len + 1);
-		if (rc == 0)
-			break;  /* success, break to skip sleep */
-
-		udelay(sleep_time);
-	}
-
-	/* take care of 'guard time' */
-	udelay(SLEEP_DURATION);
-	if (rc)
-		return -rc;
-
-	return 0;
-}
-
-/*
- * iic_tpm_write() - write to TPM register
- * @addr: register address to write to
- * @buffer: containing data to be written
- * @len: number of bytes to write
- *
- * Write len bytes from provided buffer to TPM register (little
- * endian format, i.e. buffer[0] is written as first byte).
- *
- * NOTE: TPM is big-endian for multi-byte values. Multi-byte
- * values have to be swapped.
- *
- * NOTE: use this function instead of the iic_tpm_write_generic function.
- *
- * Return -EIO on error, 0 on success
- */
-static int iic_tpm_write(uint8_t addr, uint8_t *buffer, size_t len)
-{
-	return iic_tpm_write_generic(addr, buffer, len, SLEEP_DURATION,
-			MAX_COUNT);
-}
-
-/*
- * This function is needed especially for the cleanup situation after
- * sending TPM_READY
- * */
-static int iic_tpm_write_long(uint8_t addr, uint8_t *buffer, size_t len)
-{
-	return iic_tpm_write_generic(addr, buffer, len, SLEEP_DURATION_LONG,
-			MAX_COUNT_LONG);
-}
-
-#define TPM_HEADER_SIZE 10
-
-enum tis_access {
-	TPM_ACCESS_VALID = 0x80,
-	TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
-	TPM_ACCESS_REQUEST_PENDING = 0x04,
-	TPM_ACCESS_REQUEST_USE = 0x02,
-};
-
-enum tis_status {
-	TPM_STS_VALID = 0x80,
-	TPM_STS_COMMAND_READY = 0x40,
-	TPM_STS_GO = 0x20,
-	TPM_STS_DATA_AVAIL = 0x10,
-	TPM_STS_DATA_EXPECT = 0x08,
-};
-
-#define	TPM_ACCESS(l)			(0x0000 | ((l) << 4))
-#define	TPM_STS(l)			(0x0001 | ((l) << 4))
-#define	TPM_DATA_FIFO(l)		(0x0005 | ((l) << 4))
-#define	TPM_DID_VID(l)			(0x0006 | ((l) << 4))
-
-static int check_locality(struct tpm_chip *chip, int loc)
-{
-	uint8_t buf;
-	int rc;
-
-	rc = iic_tpm_read(TPM_ACCESS(loc), &buf, 1);
-	if (rc < 0)
-		return rc;
-
-	if ((buf & (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) ==
-		(TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) {
-		chip->vendor.locality = loc;
-		return loc;
-	}
-
-	return -1;
-}
-
-static void release_locality(struct tpm_chip *chip, int loc, int force)
-{
-	uint8_t buf;
-	if (iic_tpm_read(TPM_ACCESS(loc), &buf, 1) < 0)
-		return;
-
-	if (force || (buf & (TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID)) ==
-			(TPM_ACCESS_REQUEST_PENDING | TPM_ACCESS_VALID)) {
-		buf = TPM_ACCESS_ACTIVE_LOCALITY;
-		iic_tpm_write(TPM_ACCESS(loc), &buf, 1);
-	}
-}
-
-static int request_locality(struct tpm_chip *chip, int loc)
-{
-	uint8_t buf = TPM_ACCESS_REQUEST_USE;
-
-	if (check_locality(chip, loc) >= 0)
-		return loc; /* we already have the locality */
-
-	iic_tpm_write(TPM_ACCESS(loc), &buf, 1);
-
-	/* wait for burstcount */
-	int timeout = 2 * 1000; /* 2s timeout */
-	while (timeout) {
-		if (check_locality(chip, loc) >= 0)
-			return loc;
-		mdelay(TPM_TIMEOUT);
-		timeout--;
-	}
-
-	return -1;
-}
-
-static uint8_t tpm_tis_i2c_status(struct tpm_chip *chip)
-{
-	/* NOTE: since i2c read may fail, return 0 in this case --> time-out */
-	uint8_t buf;
-	if (iic_tpm_read(TPM_STS(chip->vendor.locality), &buf, 1) < 0)
-		return 0;
-	else
-		return buf;
-}
-
-static void tpm_tis_i2c_ready(struct tpm_chip *chip)
-{
-	/* this causes the current command to be aborted */
-	uint8_t buf = TPM_STS_COMMAND_READY;
-	iic_tpm_write_long(TPM_STS(chip->vendor.locality), &buf, 1);
-}
-
-static ssize_t get_burstcount(struct tpm_chip *chip)
-{
-	ssize_t burstcnt;
-	uint8_t buf[3];
-
-	/* wait for burstcount */
-	int timeout = 2 * 1000; /* 2s timeout */
-	while (timeout) {
-		/* Note: STS is little endian */
-		if (iic_tpm_read(TPM_STS(chip->vendor.locality) + 1, buf, 3) < 0)
-			burstcnt = 0;
-		else
-			burstcnt = (buf[2] << 16) + (buf[1] << 8) + buf[0];
-
-		if (burstcnt)
-			return burstcnt;
-		mdelay(TPM_TIMEOUT);
-		timeout--;
-	}
-	return -1; //EBUSY;
-}
-
-static int wait_for_stat(struct tpm_chip *chip, uint8_t mask, int *status)
-{
-	unsigned long timeout = 2 * 1024;
-	while (timeout) {
-		*status = tpm_tis_i2c_status(chip);
-		if ((*status & mask) == mask)
-			return 0;
-		mdelay(TPM_TIMEOUT);
-		timeout--;
-	}
-
-	return -1; //ETIME;
-}
-
-static int recv_data(struct tpm_chip *chip, uint8_t *buf, size_t count)
-{
-	size_t size = 0;
-	ssize_t burstcnt;
-	int rc;
-
-	while (size < count) {
-		burstcnt = get_burstcount(chip);
-
-		/* burstcount < 0 = tpm is busy */
-		if (burstcnt < 0)
-			return burstcnt;
-
-		/* limit received data to max. left */
-		if (burstcnt > (count - size))
-			burstcnt = count - size;
-
-		rc = iic_tpm_read(TPM_DATA_FIFO(chip->vendor.locality),
-				  &(buf[size]),
-				  burstcnt);
-		if (rc == 0)
-			size += burstcnt;
-
-	}
-	return size;
-}
-
-static int tpm_tis_i2c_recv(struct tpm_chip *chip, uint8_t *buf, size_t count)
-{
-	int size = 0;
-	uint32_t expected;
-	int status;
-
-	if (count < TPM_HEADER_SIZE) {
-		size = -1; //EIO;
-		goto out;
-	}
-
-	/* read first 10 bytes, including tag, paramsize, and result */
-	size = recv_data(chip, buf, TPM_HEADER_SIZE);
-	if (size < TPM_HEADER_SIZE) {
-		printk(BIOS_DEBUG, "tpm_tis_i2c_recv: Unable to read header\n");
-		goto out;
-	}
-
-	memcpy(&expected, buf + TPM_RSP_SIZE_BYTE, sizeof(expected));
-	expected = be32_to_cpu(expected);
-	if ((size_t)expected > count) {
-		size = -1; //EIO;
-		goto out;
-	}
-
-	size += recv_data(chip, &buf[TPM_HEADER_SIZE],
-				expected - TPM_HEADER_SIZE);
-	if (size < expected) {
-		printk(BIOS_DEBUG, "tpm_tis_i2c_recv: Unable to "
-			"read remainder of result\n");
-		size = -1; //ETIME;
-		goto out;
-	}
-
-	wait_for_stat(chip, TPM_STS_VALID, &status);
-	if (status & TPM_STS_DATA_AVAIL) {	/* retry? */
-		printk(BIOS_DEBUG, "tpm_tis_i2c_recv: Error left over data\n");
-		size = -1; //EIO;
-		goto out;
-	}
-
-out:
-	tpm_tis_i2c_ready(chip);
-
-	return size;
-}
-
-static int tpm_tis_i2c_send(struct tpm_chip *chip, uint8_t *buf, size_t len)
-{
-	int rc, status;
-	ssize_t burstcnt;
-	size_t count = 0;
-	uint8_t sts = TPM_STS_GO;
-
-	if (len > TPM_BUFSIZE)
-		return -1; //E2BIG; /* command is too long for our tpm, sorry */
-
-	status = tpm_tis_i2c_status(chip);
-	if ((status & TPM_STS_COMMAND_READY) == 0) {
-		tpm_tis_i2c_ready(chip);
-		if (wait_for_stat(chip, TPM_STS_COMMAND_READY, &status) < 0) {
-			rc = -1; //ETIME;
-			goto out_err;
-		}
-	}
-
-	while (count < len - 1) {
-		burstcnt = get_burstcount(chip);
-
-		/* burstcount < 0 = tpm is busy */
-		if (burstcnt < 0)
-			return burstcnt;
-
-		if (burstcnt > (len-1-count))
-			burstcnt = len-1-count;
-
-#ifdef CONFIG_TPM_I2C_BURST_LIMITATION
-		if (burstcnt > CONFIG_TPM_I2C_BURST_LIMITATION)
-			burstcnt = CONFIG_TPM_I2C_BURST_LIMITATION;
-#endif /* CONFIG_TPM_I2C_BURST_LIMITATION */
-
-		rc = iic_tpm_write(TPM_DATA_FIFO(chip->vendor.locality),
-				   &(buf[count]), burstcnt);
-		if (rc == 0)
-			count += burstcnt;
-
-		wait_for_stat(chip, TPM_STS_VALID, &status);
-
-		if ((status & TPM_STS_DATA_EXPECT) == 0) {
-			rc = -1; //EIO;
-			goto out_err;
-		}
-
-	}
-
-	/* write last byte */
-	iic_tpm_write(TPM_DATA_FIFO(chip->vendor.locality), &(buf[count]), 1);
-	wait_for_stat(chip, TPM_STS_VALID, &status);
-	if ((status & TPM_STS_DATA_EXPECT) != 0) {
-		rc = -1; //EIO;
-		goto out_err;
-	}
-
-	/* go and do it */
-	iic_tpm_write(TPM_STS(chip->vendor.locality), &sts, 1);
-
-	return len;
-out_err:
-	tpm_tis_i2c_ready(chip);
-
-	return rc;
-}
-
-static struct tpm_vendor_specific tpm_tis_i2c = {
-	.status = tpm_tis_i2c_status,
-	.recv = tpm_tis_i2c_recv,
-	.send = tpm_tis_i2c_send,
-	.cancel = tpm_tis_i2c_ready,
-	.req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
-	.req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
-	.req_canceled = TPM_STS_COMMAND_READY,
-};
-
-/* initialisation of i2c tpm */
-
-
-int tpm_vendor_init(unsigned bus, uint32_t dev_addr)
-{
-	uint32_t vendor;
-	unsigned int old_addr;
-	int rc = 0;
-	struct tpm_chip *chip;
-
-	old_addr = tpm_dev.addr;
-	if (dev_addr != 0)
-		tpm_dev.addr = dev_addr;
-	tpm_dev.bus = bus;
-
-	chip = tpm_register_hardware(&tpm_tis_i2c);
-	if (chip < 0) {
-		rc = -1; //ENODEV;
-		goto out_err;
-	}
-
-	/* Disable interrupts (not supported) */
-	chip->vendor.irq = 0;
-
-	if (request_locality(chip, 0) != 0) {
-		rc = -1; //ENODEV;
-		goto out_err;
-	}
-
-	/* read four bytes from DID_VID register */
-	if (iic_tpm_read(TPM_DID_VID(0), (uint8_t *)&vendor, 4) < 0) {
-		rc = -1; //EIO;
-		goto out_release;
-	}
-
-	if (vendor == TPM_TIS_I2C_DID_VID_9645) {
-		tpm_dev.chip_type = SLB9645;
-	} else if (be32_to_cpu(vendor) == TPM_TIS_I2C_DID_VID_9635) {
-		tpm_dev.chip_type = SLB9635;
-	} else {
-		printk(BIOS_DEBUG, "Vendor ID 0x%08x not recognized.\n", vendor);
-		rc = -1; //ENODEV;
-		goto out_release;
-	}
-
-	printk(BIOS_DEBUG, "1.2 TPM (chip type %s device-id 0x%X)\n",
-		 chip_name[tpm_dev.chip_type], vendor >> 16);
-
-	/*
-	 * A timeout query to TPM can be placed here.
-	 * Standard timeout values are used so far
-	 */
-
-	return 0;
-
-out_release:
-	release_locality(chip, 0, 1);
-
-out_err:
-	tpm_dev.addr = old_addr;
-	return rc;
-}
-
-void tpm_vendor_cleanup(struct tpm_chip *chip)
-{
-	release_locality(chip, chip->vendor.locality, 1);
-}