# SPDX-License-Identifier: GPL-2.0+
#
-# TODO: Merge tpm_tis_lpc.c with tpm.c
obj-$(CONFIG_TPM_ATMEL_TWI) += tpm_atmel_twi.o
-obj-$(CONFIG_TPM_TIS_I2C) += tpm.o
obj-$(CONFIG_TPM_TIS_I2C) += tpm_tis_i2c.o
obj-$(CONFIG_TPM_TIS_LPC) += tpm_tis_lpc.o
obj-$(CONFIG_TPM_TIS_SANDBOX) += tpm_tis_sandbox.o
+++ /dev/null
-/*
- * 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
- *
- * 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 <config.h>
-#include <common.h>
-#include <dm.h>
-#include <linux/compiler.h>
-#include <fdtdec.h>
-#include <i2c.h>
-#include <tpm.h>
-#include <asm-generic/errno.h>
-#include <linux/types.h>
-#include <linux/unaligned/be_byteshift.h>
-
-#include "tpm_private.h"
-
-DECLARE_GLOBAL_DATA_PTR;
-
-/* TPM configuration */
-struct tpm {
- struct udevice *dev;
- char inited;
-} tpm;
-
-/* Global structure for tpm chip data */
-static struct tpm_chip g_chip;
-
-enum tpm_duration {
- TPM_SHORT = 0,
- TPM_MEDIUM = 1,
- TPM_LONG = 2,
- TPM_UNDEFINED,
-};
-
-/* Extended error numbers from linux (see errno.h) */
-#define ECANCELED 125 /* Operation Canceled */
-
-/* Timer frequency. Corresponds to msec timer resolution*/
-#define HZ 1000
-
-#define TPM_MAX_ORDINAL 243
-#define TPM_MAX_PROTECTED_ORDINAL 12
-#define TPM_PROTECTED_ORDINAL_MASK 0xFF
-
-#define TPM_CMD_COUNT_BYTE 2
-#define TPM_CMD_ORDINAL_BYTE 6
-
-/*
- * Array with one entry per ordinal defining the maximum amount
- * of time the chip could take to return the result. The ordinal
- * designation of short, medium or long is defined in a table in
- * TCG Specification TPM Main Part 2 TPM Structures Section 17. The
- * values of the SHORT, MEDIUM, and LONG durations are retrieved
- * from the chip during initialization with a call to tpm_get_timeouts.
- */
-static const u8 tpm_protected_ordinal_duration[TPM_MAX_PROTECTED_ORDINAL] = {
- TPM_UNDEFINED, /* 0 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED, /* 5 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_SHORT, /* 10 */
- TPM_SHORT,
-};
-
-static const u8 tpm_ordinal_duration[TPM_MAX_ORDINAL] = {
- TPM_UNDEFINED, /* 0 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED, /* 5 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_SHORT, /* 10 */
- TPM_SHORT,
- TPM_MEDIUM,
- TPM_LONG,
- TPM_LONG,
- TPM_MEDIUM, /* 15 */
- TPM_SHORT,
- TPM_SHORT,
- TPM_MEDIUM,
- TPM_LONG,
- TPM_SHORT, /* 20 */
- TPM_SHORT,
- TPM_MEDIUM,
- TPM_MEDIUM,
- TPM_MEDIUM,
- TPM_SHORT, /* 25 */
- TPM_SHORT,
- TPM_MEDIUM,
- TPM_SHORT,
- TPM_SHORT,
- TPM_MEDIUM, /* 30 */
- TPM_LONG,
- TPM_MEDIUM,
- TPM_SHORT,
- TPM_SHORT,
- TPM_SHORT, /* 35 */
- TPM_MEDIUM,
- TPM_MEDIUM,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_MEDIUM, /* 40 */
- TPM_LONG,
- TPM_MEDIUM,
- TPM_SHORT,
- TPM_SHORT,
- TPM_SHORT, /* 45 */
- TPM_SHORT,
- TPM_SHORT,
- TPM_SHORT,
- TPM_LONG,
- TPM_MEDIUM, /* 50 */
- TPM_MEDIUM,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED, /* 55 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_MEDIUM, /* 60 */
- TPM_MEDIUM,
- TPM_MEDIUM,
- TPM_SHORT,
- TPM_SHORT,
- TPM_MEDIUM, /* 65 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_SHORT, /* 70 */
- TPM_SHORT,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED, /* 75 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_LONG, /* 80 */
- TPM_UNDEFINED,
- TPM_MEDIUM,
- TPM_LONG,
- TPM_SHORT,
- TPM_UNDEFINED, /* 85 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_SHORT, /* 90 */
- TPM_SHORT,
- TPM_SHORT,
- TPM_SHORT,
- TPM_SHORT,
- TPM_UNDEFINED, /* 95 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_MEDIUM, /* 100 */
- TPM_SHORT,
- TPM_SHORT,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED, /* 105 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_SHORT, /* 110 */
- TPM_SHORT,
- TPM_SHORT,
- TPM_SHORT,
- TPM_SHORT,
- TPM_SHORT, /* 115 */
- TPM_SHORT,
- TPM_SHORT,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_LONG, /* 120 */
- TPM_LONG,
- TPM_MEDIUM,
- TPM_UNDEFINED,
- TPM_SHORT,
- TPM_SHORT, /* 125 */
- TPM_SHORT,
- TPM_LONG,
- TPM_SHORT,
- TPM_SHORT,
- TPM_SHORT, /* 130 */
- TPM_MEDIUM,
- TPM_UNDEFINED,
- TPM_SHORT,
- TPM_MEDIUM,
- TPM_UNDEFINED, /* 135 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_SHORT, /* 140 */
- TPM_SHORT,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED, /* 145 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_SHORT, /* 150 */
- TPM_MEDIUM,
- TPM_MEDIUM,
- TPM_SHORT,
- TPM_SHORT,
- TPM_UNDEFINED, /* 155 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_SHORT, /* 160 */
- TPM_SHORT,
- TPM_SHORT,
- TPM_SHORT,
- TPM_UNDEFINED,
- TPM_UNDEFINED, /* 165 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_LONG, /* 170 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED, /* 175 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_MEDIUM, /* 180 */
- TPM_SHORT,
- TPM_MEDIUM,
- TPM_MEDIUM,
- TPM_MEDIUM,
- TPM_MEDIUM, /* 185 */
- TPM_SHORT,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED, /* 190 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED, /* 195 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_SHORT, /* 200 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_SHORT,
- TPM_SHORT, /* 205 */
- TPM_SHORT,
- TPM_SHORT,
- TPM_SHORT,
- TPM_SHORT,
- TPM_MEDIUM, /* 210 */
- TPM_UNDEFINED,
- TPM_MEDIUM,
- TPM_MEDIUM,
- TPM_MEDIUM,
- TPM_UNDEFINED, /* 215 */
- TPM_MEDIUM,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_SHORT,
- TPM_SHORT, /* 220 */
- TPM_SHORT,
- TPM_SHORT,
- TPM_SHORT,
- TPM_SHORT,
- TPM_UNDEFINED, /* 225 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_SHORT, /* 230 */
- TPM_LONG,
- TPM_MEDIUM,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED, /* 235 */
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_UNDEFINED,
- TPM_SHORT, /* 240 */
- TPM_UNDEFINED,
- TPM_MEDIUM,
-};
-
-/* Returns max number of milliseconds to wait */
-static unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip,
- u32 ordinal)
-{
- int duration_idx = TPM_UNDEFINED;
- int duration = 0;
-
- if (ordinal < TPM_MAX_ORDINAL) {
- duration_idx = tpm_ordinal_duration[ordinal];
- } else if ((ordinal & TPM_PROTECTED_ORDINAL_MASK) <
- TPM_MAX_PROTECTED_ORDINAL) {
- duration_idx = tpm_protected_ordinal_duration[
- ordinal & TPM_PROTECTED_ORDINAL_MASK];
- }
-
- if (duration_idx != TPM_UNDEFINED)
- duration = chip->vendor.duration[duration_idx];
-
- if (duration <= 0)
- return 2 * 60 * HZ; /* Two minutes timeout */
- else
- return duration;
-}
-
-static ssize_t tpm_transmit(const unsigned char *buf, size_t bufsiz)
-{
- int rc;
- u32 count, ordinal;
- unsigned long start, stop;
-
- struct tpm_chip *chip = &g_chip;
-
- /* switch endianess: big->little */
- count = get_unaligned_be32(buf + TPM_CMD_COUNT_BYTE);
- ordinal = get_unaligned_be32(buf + TPM_CMD_ORDINAL_BYTE);
-
- if (count == 0) {
- error("no data\n");
- return -ENODATA;
- }
- if (count > bufsiz) {
- error("invalid count value %x %zx\n", count, bufsiz);
- return -E2BIG;
- }
-
- debug("Calling send\n");
- rc = chip->vendor.send(chip, (u8 *)buf, count);
- debug(" ... done calling send\n");
- if (rc < 0) {
- error("tpm_transmit: tpm_send: error %d\n", rc);
- goto out;
- }
-
- if (chip->vendor.irq)
- goto out_recv;
-
- start = get_timer(0);
- stop = tpm_calc_ordinal_duration(chip, ordinal);
- do {
- debug("waiting for status... %ld %ld\n", start, stop);
- u8 status = chip->vendor.status(chip);
- if ((status & chip->vendor.req_complete_mask) ==
- chip->vendor.req_complete_val) {
- debug("...got it;\n");
- goto out_recv;
- }
-
- if (status == chip->vendor.req_canceled) {
- error("Operation Canceled\n");
- rc = -ECANCELED;
- goto out;
- }
- udelay(TPM_TIMEOUT * 1000);
- } while (get_timer(start) < stop);
-
- chip->vendor.cancel(chip);
- error("Operation Timed out\n");
- rc = -ETIME;
- goto out;
-
-out_recv:
- debug("out_recv: reading response...\n");
- rc = chip->vendor.recv(chip, (u8 *)buf, TPM_BUFSIZE);
- if (rc < 0)
- error("tpm_transmit: tpm_recv: error %d\n", rc);
-
-out:
- return rc;
-}
-
-static int tpm_open_dev(struct udevice *dev)
-{
- int rc;
-
- debug("%s: start\n", __func__);
- if (g_chip.is_open)
- return -EBUSY;
- rc = tpm_vendor_init(dev);
- if (rc < 0)
- g_chip.is_open = 0;
- return rc;
-}
-
-static void tpm_close(void)
-{
- if (g_chip.is_open) {
- tpm_vendor_cleanup(&g_chip);
- g_chip.is_open = 0;
- }
-}
-
-/**
- * Decode TPM configuration.
- *
- * @param dev Returns a configuration of TPM device
- * @return 0 if ok, -1 on error
- */
-static int tpm_decode_config(struct tpm *dev)
-{
- const void *blob = gd->fdt_blob;
- struct udevice *bus;
- int chip_addr;
- int parent;
- int node;
- int ret;
-
- node = fdtdec_next_compatible(blob, 0, COMPAT_INFINEON_SLB9635_TPM);
- if (node < 0) {
- node = fdtdec_next_compatible(blob, 0,
- COMPAT_INFINEON_SLB9645_TPM);
- }
- if (node < 0) {
- debug("%s: Node not found\n", __func__);
- return -1;
- }
- parent = fdt_parent_offset(blob, node);
- if (parent < 0) {
- debug("%s: Cannot find node parent\n", __func__);
- return -1;
- }
-
- /*
- * TODO(sjg@chromium.org): Remove this when driver model supports
- * TPMs
- */
- ret = uclass_get_device_by_of_offset(UCLASS_I2C, parent, &bus);
- if (ret) {
- debug("Cannot find bus for node '%s: ret=%d'\n",
- fdt_get_name(blob, parent, NULL), ret);
- return ret;
- }
-
- chip_addr = fdtdec_get_int(blob, node, "reg", -1);
- if (chip_addr == -1) {
- debug("Cannot find reg property for node '%s: ret=%d'\n",
- fdt_get_name(blob, node, NULL), ret);
- return ret;
- }
- /*
- * TODO(sjg@chromium.org): Older TPMs will need to use the older method
- * in iic_tpm_read() so the offset length needs to be 0 here.
- */
- ret = i2c_get_chip(bus, chip_addr, 1, &dev->dev);
- if (ret) {
- debug("Cannot find device for node '%s: ret=%d'\n",
- fdt_get_name(blob, node, NULL), ret);
- return ret;
- }
-
- return 0;
-}
-
-struct tpm_chip *tpm_register_hardware(const struct tpm_vendor_specific *entry)
-{
- struct tpm_chip *chip;
-
- /* Driver specific per-device data */
- chip = &g_chip;
- memcpy(&chip->vendor, entry, sizeof(struct tpm_vendor_specific));
- chip->is_open = 1;
-
- return chip;
-}
-
-int tis_init(void)
-{
- if (tpm.inited)
- return 0;
-
- if (tpm_decode_config(&tpm))
- return -1;
-
- debug("%s: done\n", __func__);
-
- tpm.inited = 1;
-
- return 0;
-}
-
-int tis_open(void)
-{
- int rc;
-
- if (!tpm.inited)
- return -1;
-
- rc = tpm_open_dev(tpm.dev);
-
- return rc;
-}
-
-int tis_close(void)
-{
- if (!tpm.inited)
- return -1;
-
- tpm_close();
-
- return 0;
-}
-
-int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
- uint8_t *recvbuf, size_t *rbuf_len)
-{
- int len;
- uint8_t buf[4096];
-
- if (!tpm.inited)
- return -1;
-
- if (sizeof(buf) < sbuf_size)
- return -1;
-
- memcpy(buf, sendbuf, sbuf_size);
-
- len = tpm_transmit(buf, sbuf_size);
-
- if (len < 10) {
- *rbuf_len = 0;
- return -1;
- }
-
- memcpy(recvbuf, buf, len);
- *rbuf_len = len;
-
- return 0;
-}
#include <linux/types.h>
#include <linux/unaligned/be_byteshift.h>
-#include "tpm_private.h"
+#include "tpm_tis_i2c.h"
DECLARE_GLOBAL_DATA_PTR;
#define TPM_DATA_FIFO(l) (0x0005 | ((l) << 4))
#define TPM_DID_VID(l) (0x0006 | ((l) << 4))
+enum tpm_duration {
+ TPM_SHORT = 0,
+ TPM_MEDIUM = 1,
+ TPM_LONG = 2,
+ TPM_UNDEFINED,
+};
+
+/* Extended error numbers from linux (see errno.h) */
+#define ECANCELED 125 /* Operation Canceled */
+
+/* Timer frequency. Corresponds to msec timer resolution*/
+#define HZ 1000
+
+#define TPM_MAX_ORDINAL 243
+#define TPM_MAX_PROTECTED_ORDINAL 12
+#define TPM_PROTECTED_ORDINAL_MASK 0xFF
+
+#define TPM_CMD_COUNT_BYTE 2
+#define TPM_CMD_ORDINAL_BYTE 6
+
+/*
+ * Array with one entry per ordinal defining the maximum amount
+ * of time the chip could take to return the result. The ordinal
+ * designation of short, medium or long is defined in a table in
+ * TCG Specification TPM Main Part 2 TPM Structures Section 17. The
+ * values of the SHORT, MEDIUM, and LONG durations are retrieved
+ * from the chip during initialization with a call to tpm_get_timeouts.
+ */
+static const u8 tpm_protected_ordinal_duration[TPM_MAX_PROTECTED_ORDINAL] = {
+ TPM_UNDEFINED, /* 0 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 5 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 10 */
+ TPM_SHORT,
+};
+
+static const u8 tpm_ordinal_duration[TPM_MAX_ORDINAL] = {
+ TPM_UNDEFINED, /* 0 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 5 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 10 */
+ TPM_SHORT,
+ TPM_MEDIUM,
+ TPM_LONG,
+ TPM_LONG,
+ TPM_MEDIUM, /* 15 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_MEDIUM,
+ TPM_LONG,
+ TPM_SHORT, /* 20 */
+ TPM_SHORT,
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_SHORT, /* 25 */
+ TPM_SHORT,
+ TPM_MEDIUM,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_MEDIUM, /* 30 */
+ TPM_LONG,
+ TPM_MEDIUM,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT, /* 35 */
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_MEDIUM, /* 40 */
+ TPM_LONG,
+ TPM_MEDIUM,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT, /* 45 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_LONG,
+ TPM_MEDIUM, /* 50 */
+ TPM_MEDIUM,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 55 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_MEDIUM, /* 60 */
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_MEDIUM, /* 65 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 70 */
+ TPM_SHORT,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 75 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_LONG, /* 80 */
+ TPM_UNDEFINED,
+ TPM_MEDIUM,
+ TPM_LONG,
+ TPM_SHORT,
+ TPM_UNDEFINED, /* 85 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 90 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_UNDEFINED, /* 95 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_MEDIUM, /* 100 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 105 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 110 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT, /* 115 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_LONG, /* 120 */
+ TPM_LONG,
+ TPM_MEDIUM,
+ TPM_UNDEFINED,
+ TPM_SHORT,
+ TPM_SHORT, /* 125 */
+ TPM_SHORT,
+ TPM_LONG,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT, /* 130 */
+ TPM_MEDIUM,
+ TPM_UNDEFINED,
+ TPM_SHORT,
+ TPM_MEDIUM,
+ TPM_UNDEFINED, /* 135 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 140 */
+ TPM_SHORT,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 145 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 150 */
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_UNDEFINED, /* 155 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 160 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 165 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_LONG, /* 170 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 175 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_MEDIUM, /* 180 */
+ TPM_SHORT,
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_MEDIUM, /* 185 */
+ TPM_SHORT,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 190 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 195 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 200 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT,
+ TPM_SHORT, /* 205 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_MEDIUM, /* 210 */
+ TPM_UNDEFINED,
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_MEDIUM,
+ TPM_UNDEFINED, /* 215 */
+ TPM_MEDIUM,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT,
+ TPM_SHORT, /* 220 */
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_SHORT,
+ TPM_UNDEFINED, /* 225 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 230 */
+ TPM_LONG,
+ TPM_MEDIUM,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED, /* 235 */
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_UNDEFINED,
+ TPM_SHORT, /* 240 */
+ TPM_UNDEFINED,
+ TPM_MEDIUM,
+};
+
+/* TPM configuration */
+struct tpm {
+ struct udevice *dev;
+ char inited;
+} tpm;
+
+/* Global structure for tpm chip data */
+static struct tpm_chip g_chip;
+
/* Structure to store I2C TPM specific stuff */
struct tpm_dev {
struct udevice *dev;
{
release_locality(chip, chip->vendor.locality, 1);
}
+
+/* Returns max number of milliseconds to wait */
+static unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip,
+ u32 ordinal)
+{
+ int duration_idx = TPM_UNDEFINED;
+ int duration = 0;
+
+ if (ordinal < TPM_MAX_ORDINAL) {
+ duration_idx = tpm_ordinal_duration[ordinal];
+ } else if ((ordinal & TPM_PROTECTED_ORDINAL_MASK) <
+ TPM_MAX_PROTECTED_ORDINAL) {
+ duration_idx = tpm_protected_ordinal_duration[
+ ordinal & TPM_PROTECTED_ORDINAL_MASK];
+ }
+
+ if (duration_idx != TPM_UNDEFINED)
+ duration = chip->vendor.duration[duration_idx];
+
+ if (duration <= 0)
+ return 2 * 60 * HZ; /* Two minutes timeout */
+ else
+ return duration;
+}
+
+static ssize_t tpm_transmit(const unsigned char *buf, size_t bufsiz)
+{
+ int rc;
+ u32 count, ordinal;
+ unsigned long start, stop;
+
+ struct tpm_chip *chip = &g_chip;
+
+ /* switch endianess: big->little */
+ count = get_unaligned_be32(buf + TPM_CMD_COUNT_BYTE);
+ ordinal = get_unaligned_be32(buf + TPM_CMD_ORDINAL_BYTE);
+
+ if (count == 0) {
+ error("no data\n");
+ return -ENODATA;
+ }
+ if (count > bufsiz) {
+ error("invalid count value %x %zx\n", count, bufsiz);
+ return -E2BIG;
+ }
+
+ debug("Calling send\n");
+ rc = chip->vendor.send(chip, (u8 *)buf, count);
+ debug(" ... done calling send\n");
+ if (rc < 0) {
+ error("tpm_transmit: tpm_send: error %d\n", rc);
+ goto out;
+ }
+
+ if (chip->vendor.irq)
+ goto out_recv;
+
+ start = get_timer(0);
+ stop = tpm_calc_ordinal_duration(chip, ordinal);
+ do {
+ debug("waiting for status... %ld %ld\n", start, stop);
+ u8 status = chip->vendor.status(chip);
+ if ((status & chip->vendor.req_complete_mask) ==
+ chip->vendor.req_complete_val) {
+ debug("...got it;\n");
+ goto out_recv;
+ }
+
+ if (status == chip->vendor.req_canceled) {
+ error("Operation Canceled\n");
+ rc = -ECANCELED;
+ goto out;
+ }
+ udelay(TPM_TIMEOUT * 1000);
+ } while (get_timer(start) < stop);
+
+ chip->vendor.cancel(chip);
+ error("Operation Timed out\n");
+ rc = -ETIME;
+ goto out;
+
+out_recv:
+ debug("out_recv: reading response...\n");
+ rc = chip->vendor.recv(chip, (u8 *)buf, TPM_BUFSIZE);
+ if (rc < 0)
+ error("tpm_transmit: tpm_recv: error %d\n", rc);
+
+out:
+ return rc;
+}
+
+static int tpm_open_dev(struct udevice *dev)
+{
+ int rc;
+
+ debug("%s: start\n", __func__);
+ if (g_chip.is_open)
+ return -EBUSY;
+ rc = tpm_vendor_init(dev);
+ if (rc < 0)
+ g_chip.is_open = 0;
+ return rc;
+}
+
+static void tpm_close(void)
+{
+ if (g_chip.is_open) {
+ tpm_vendor_cleanup(&g_chip);
+ g_chip.is_open = 0;
+ }
+}
+
+/**
+ * Decode TPM configuration.
+ *
+ * @param dev Returns a configuration of TPM device
+ * @return 0 if ok, -1 on error
+ */
+static int tpm_decode_config(struct tpm *dev)
+{
+ const void *blob = gd->fdt_blob;
+ struct udevice *bus;
+ int chip_addr;
+ int parent;
+ int node;
+ int ret;
+
+ node = fdtdec_next_compatible(blob, 0, COMPAT_INFINEON_SLB9635_TPM);
+ if (node < 0) {
+ node = fdtdec_next_compatible(blob, 0,
+ COMPAT_INFINEON_SLB9645_TPM);
+ }
+ if (node < 0) {
+ debug("%s: Node not found\n", __func__);
+ return -1;
+ }
+ parent = fdt_parent_offset(blob, node);
+ if (parent < 0) {
+ debug("%s: Cannot find node parent\n", __func__);
+ return -1;
+ }
+
+ /*
+ * TODO(sjg@chromium.org): Remove this when driver model supports
+ * TPMs
+ */
+ ret = uclass_get_device_by_of_offset(UCLASS_I2C, parent, &bus);
+ if (ret) {
+ debug("Cannot find bus for node '%s: ret=%d'\n",
+ fdt_get_name(blob, parent, NULL), ret);
+ return ret;
+ }
+
+ chip_addr = fdtdec_get_int(blob, node, "reg", -1);
+ if (chip_addr == -1) {
+ debug("Cannot find reg property for node '%s: ret=%d'\n",
+ fdt_get_name(blob, node, NULL), ret);
+ return ret;
+ }
+ /*
+ * TODO(sjg@chromium.org): Older TPMs will need to use the older method
+ * in iic_tpm_read() so the offset length needs to be 0 here.
+ */
+ ret = i2c_get_chip(bus, chip_addr, 1, &dev->dev);
+ if (ret) {
+ debug("Cannot find device for node '%s: ret=%d'\n",
+ fdt_get_name(blob, node, NULL), ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+struct tpm_chip *tpm_register_hardware(const struct tpm_vendor_specific *entry)
+{
+ struct tpm_chip *chip;
+
+ /* Driver specific per-device data */
+ chip = &g_chip;
+ memcpy(&chip->vendor, entry, sizeof(struct tpm_vendor_specific));
+ chip->is_open = 1;
+
+ return chip;
+}
+
+int tis_init(void)
+{
+ if (tpm.inited)
+ return 0;
+
+ if (tpm_decode_config(&tpm))
+ return -1;
+
+ debug("%s: done\n", __func__);
+
+ tpm.inited = 1;
+
+ return 0;
+}
+
+int tis_open(void)
+{
+ int rc;
+
+ if (!tpm.inited)
+ return -1;
+
+ rc = tpm_open_dev(tpm.dev);
+
+ return rc;
+}
+
+int tis_close(void)
+{
+ if (!tpm.inited)
+ return -1;
+
+ tpm_close();
+
+ return 0;
+}
+
+int tis_sendrecv(const uint8_t *sendbuf, size_t sbuf_size,
+ uint8_t *recvbuf, size_t *rbuf_len)
+{
+ int len;
+ uint8_t buf[4096];
+
+ if (!tpm.inited)
+ return -1;
+
+ if (sizeof(buf) < sbuf_size)
+ return -1;
+
+ memcpy(buf, sendbuf, sbuf_size);
+
+ len = tpm_transmit(buf, sbuf_size);
+
+ if (len < 10) {
+ *rbuf_len = 0;
+ return -1;
+ }
+
+ memcpy(recvbuf, buf, len);
+ *rbuf_len = len;
+
+ return 0;
+}
* It is based on the Linux kernel driver tpm.c from Leendert van
* Dorn, Dave Safford, Reiner Sailer, and Kyleen Hall.
*
- *
- * 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
*/
-#ifndef _TPM_PRIVATE_H_
-#define _TPM_PRIVATE_H_
+#ifndef _TPM_TIS_I2C_H
+#define _TPM_TIS_I2C_H
#include <linux/compiler.h>
#include <linux/types.h>
void tpm_vendor_cleanup(struct tpm_chip *chip);
-
#endif
projects / u-boot.git / commitdiff
