*
* 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
+ * SPDX-License-Identifier: GPL-2.0
*/
#include <common.h>
+#include <dm.h>
#include <fdtdec.h>
#include <linux/compiler.h>
#include <i2c.h>
DECLARE_GLOBAL_DATA_PTR;
-/* Address of the TPM on the I2C bus */
-#define TPM_I2C_ADDR 0x20
-
/* Max buffer size supported by our tpm */
#define TPM_DEV_BUFSIZE 1260
#define TPM_HEADER_SIZE 10
-/*
- * Expected value for DIDVID register
- *
- * The only device the system knows about at this moment is Infineon slb9635.
- */
-#define TPM_TIS_I2C_DID_VID 0x000b15d1L
-
enum tis_access {
TPM_ACCESS_VALID = 0x80,
TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
/* Structure to store I2C TPM specific stuff */
struct tpm_dev {
- uint addr;
+ struct udevice *dev;
u8 buf[TPM_DEV_BUFSIZE + sizeof(u8)]; /* Max buffer size + addr */
enum i2c_chip_type chip_type;
};
-static struct tpm_dev tpm_dev = {
- .addr = TPM_I2C_ADDR
-};
-
static struct tpm_dev tpm_dev;
/*
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.addr, 0, 0,
- (uchar *)&addrbuf, 1);
+ rc = dm_i2c_write(tpm_dev.dev, 0, (uchar *)&addrbuf, 1);
if (rc == 0)
break; /* Success, break to skip sleep */
udelay(SLEEP_DURATION);
*/
for (count = 0; count < MAX_COUNT; count++) {
udelay(SLEEP_DURATION);
- rc = i2c_read(tpm_dev.addr, 0, 0, buffer, len);
+ rc = dm_i2c_read(tpm_dev.dev, 0, buffer, len);
if (rc == 0)
break; /* success, break to skip sleep */
}
* be safe on the safe side.
*/
for (count = 0; count < MAX_COUNT; count++) {
- rc = i2c_read(tpm_dev.addr, addr, 1, buffer, len);
+ rc = dm_i2c_read(tpm_dev.dev, addr, buffer, len);
if (rc == 0)
break; /* break here to skip sleep */
udelay(SLEEP_DURATION);
int rc = 0;
int count;
- /* Prepare send buffer */
- tpm_dev.buf[0] = addr;
- memcpy(&(tpm_dev.buf[1]), buffer, len);
-
for (count = 0; count < max_count; count++) {
- rc = i2c_write(tpm_dev.addr, 0, 0, tpm_dev.buf, len + 1);
+ rc = dm_i2c_write(tpm_dev.dev, addr, buffer, len);
if (rc == 0)
break; /* Success, break to skip sleep */
udelay(sleep_time);
}
/* take care of 'guard time' */
- udelay(SLEEP_DURATION);
+ udelay(sleep_time);
if (rc)
return -rc;
{
unsigned long start, stop;
u8 buf = TPM_ACCESS_REQUEST_USE;
+ int rc;
if (check_locality(chip, loc) >= 0)
return loc; /* We already have the locality */
- iic_tpm_write(TPM_ACCESS(loc), &buf, 1);
+ rc = iic_tpm_write(TPM_ACCESS(loc), &buf, 1);
+ if (rc)
+ return rc;
/* Wait for burstcount */
start = get_timer(0);
static void tpm_tis_i2c_ready(struct tpm_chip *chip)
{
+ int rc;
+
/* This causes the current command to be aborted */
u8 buf = TPM_STS_COMMAND_READY;
- iic_tpm_write_long(TPM_STS(chip->vendor.locality), &buf, 1);
+ debug("%s\n", __func__);
+ rc = iic_tpm_write_long(TPM_STS(chip->vendor.locality), &buf, 1);
+ if (rc)
+ debug("%s: rc=%d\n", __func__, rc);
}
static ssize_t get_burstcount(struct tpm_chip *chip)
expected = get_unaligned_be32(buf + TPM_RSP_SIZE_BYTE);
if ((size_t)expected > count) {
+ error("Error size=%x, expected=%x, count=%x\n", size, expected,
+ count);
size = -EIO;
goto out;
}
static int tpm_tis_i2c_send(struct tpm_chip *chip, u8 *buf, size_t len)
{
int rc, status;
- ssize_t burstcnt;
+ size_t burstcnt;
size_t count = 0;
int retry = 0;
u8 sts = TPM_STS_GO;
+ debug("%s: len=%d\n", __func__, len);
if (len > TPM_DEV_BUFSIZE)
return -E2BIG; /* Command is too long for our tpm, sorry */
if (burstcnt < 0)
return burstcnt;
- while (count < len - 1) {
- if (burstcnt > len - 1 - count)
- burstcnt = len - 1 - count;
+ while (count < len) {
+ udelay(300);
+ if (burstcnt > len - count)
+ burstcnt = len - count;
#ifdef CONFIG_TPM_TIS_I2C_BURST_LIMITATION
if (retry && burstcnt > CONFIG_TPM_TIS_I2C_BURST_LIMITATION)
if (rc == 0)
count += burstcnt;
else {
- retry++;
- wait_for_stat(chip, TPM_STS_VALID,
- chip->vendor.timeout_c, &status);
+ debug("%s: error\n", __func__);
+ if (retry++ > 10) {
+ rc = -EIO;
+ goto out_err;
+ }
+ rc = wait_for_stat(chip, TPM_STS_VALID,
+ chip->vendor.timeout_c, &status);
+ if (rc)
+ goto out_err;
if ((status & TPM_STS_DATA_EXPECT) == 0) {
rc = -EIO;
}
}
- /* Write last byte */
- iic_tpm_write(TPM_DATA_FIFO(chip->vendor.locality), &(buf[count]), 1);
- wait_for_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c, &status);
- if ((status & TPM_STS_DATA_EXPECT) != 0) {
- rc = -EIO;
- goto out_err;
- }
-
/* Go and do it */
iic_tpm_write(TPM_STS(chip->vendor.locality), &sts, 1);
+ debug("done\n");
return len;
out_err:
+ debug("%s: out_err\n", __func__);
tpm_tis_i2c_ready(chip);
/*
* The TPM needs some time to clean up here,
static enum i2c_chip_type tpm_vendor_chip_type(void)
{
-#ifdef CONFIG_OF_CONTROL
+#if CONFIG_IS_ENABLED(OF_CONTROL)
const void *blob = gd->fdt_blob;
if (fdtdec_next_compatible(blob, 0, COMPAT_INFINEON_SLB9645_TPM) >= 0)
return UNKNOWN;
}
-/* Initialisation of i2c tpm */
-int tpm_vendor_init(uint32_t dev_addr)
+int tpm_vendor_init(struct udevice *dev)
{
+ struct tpm_chip *chip;
u32 vendor;
u32 expected_did_vid;
- uint 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.dev = dev;
tpm_dev.chip_type = tpm_vendor_chip_type();
chip = tpm_register_hardware(&tpm_tis_i2c);
- if (chip < 0) {
- rc = -ENODEV;
- goto out_err;
- }
+ if (chip < 0)
+ return -ENODEV;
/* Disable interrupts (not supported) */
chip->vendor.irq = 0;
chip->vendor.timeout_c = TIS_SHORT_TIMEOUT;
chip->vendor.timeout_d = TIS_SHORT_TIMEOUT;
- if (request_locality(chip, 0) < 0) {
- rc = -ENODEV;
- goto out_err;
- }
+ if (request_locality(chip, 0) < 0)
+ return -ENODEV;
/* Read four bytes from DID_VID register */
if (iic_tpm_read(TPM_DID_VID(0), (uchar *)&vendor, 4) < 0) {
- rc = -EIO;
- goto out_release;
+ release_locality(chip, 0, 1);
+ return -EIO;
}
if (tpm_dev.chip_type == SLB9635) {
if (tpm_dev.chip_type != UNKNOWN && vendor != expected_did_vid) {
error("Vendor id did not match! ID was %08x\n", vendor);
- rc = -ENODEV;
- goto out_release;
+ return -ENODEV;
}
debug("1.2 TPM (chip type %s device-id 0x%X)\n",
*/
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)
projects / karo-tx-uboot.git / blobdiff