diff options
Diffstat (limited to 'drivers/tpm')
| -rw-r--r-- | drivers/tpm/Makefile | 2 | ||||
| -rw-r--r-- | drivers/tpm/tpm.c | 594 | ||||
| -rw-r--r-- | drivers/tpm/tpm_tis_i2c.c | 548 | ||||
| -rw-r--r-- | drivers/tpm/tpm_tis_i2c.h (renamed from drivers/tpm/tpm_private.h) | 24 |
4 files changed, 550 insertions, 618 deletions
diff --git a/drivers/tpm/Makefile b/drivers/tpm/Makefile index 150570ee7e..597966ce1f 100644 --- a/drivers/tpm/Makefile +++ b/drivers/tpm/Makefile @@ -3,9 +3,7 @@ # 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 diff --git a/drivers/tpm/tpm.c b/drivers/tpm/tpm.c deleted file mode 100644 index 24997f6702..0000000000 --- a/drivers/tpm/tpm.c +++ /dev/null @@ -1,594 +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 - * - * 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; -} diff --git a/drivers/tpm/tpm_tis_i2c.c b/drivers/tpm/tpm_tis_i2c.c index 438a221607..e547f0ad9f 100644 --- a/drivers/tpm/tpm_tis_i2c.c +++ b/drivers/tpm/tpm_tis_i2c.c @@ -30,7 +30,7 @@ #include <linux/types.h> #include <linux/unaligned/be_byteshift.h> -#include "tpm_private.h" +#include "tpm_tis_i2c.h" DECLARE_GLOBAL_DATA_PTR; @@ -95,6 +95,304 @@ static const char * const chip_name[] = { #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; @@ -595,3 +893,251 @@ void tpm_vendor_cleanup(struct tpm_chip *chip) { 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; +} diff --git a/drivers/tpm/tpm_private.h b/drivers/tpm/tpm_tis_i2c.h index daaf8b8029..75fa829e3d 100644 --- a/drivers/tpm/tpm_private.h +++ b/drivers/tpm/tpm_tis_i2c.h @@ -13,28 +13,11 @@ * 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> @@ -134,5 +117,4 @@ int tpm_vendor_init(struct udevice *dev); void tpm_vendor_cleanup(struct tpm_chip *chip); - #endif |