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https://github.com/AsahiLinux/u-boot
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tpm: Add Infineon slb9635_i2c TPM driver
Add a driver for the I2C TPM from Infineon. Signed-off-by: Che-Liang Chiou <clchiou@chromium.org> Signed-off-by: Rong Chang <rongchang@chromium.org> Signed-off-by: Tom Wai-Hong Tam <waihong@chromium.org> Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Rong Chang
Simon Glass
parent
af98a70a6b
commit
f626799816
9 changed files with 1414 additions and 1 deletions
2
Makefile
2
Makefile
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@ -314,7 +314,7 @@ endif
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LIBS-y += drivers/rtc/librtc.o
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LIBS-y += drivers/rtc/librtc.o
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LIBS-y += drivers/serial/libserial.o
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LIBS-y += drivers/serial/libserial.o
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LIBS-y += drivers/sound/libsound.o
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LIBS-y += drivers/sound/libsound.o
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LIBS-$(CONFIG_GENERIC_LPC_TPM) += drivers/tpm/libtpm.o
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LIBS-y += drivers/tpm/libtpm.o
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LIBS-y += drivers/twserial/libtws.o
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LIBS-y += drivers/twserial/libtws.o
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LIBS-y += drivers/usb/eth/libusb_eth.o
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LIBS-y += drivers/usb/eth/libusb_eth.o
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LIBS-y += drivers/usb/gadget/libusb_gadget.o
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LIBS-y += drivers/usb/gadget/libusb_gadget.o
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@ -23,7 +23,11 @@ include $(TOPDIR)/config.mk
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LIB := $(obj)libtpm.o
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LIB := $(obj)libtpm.o
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$(shell mkdir -p $(obj)slb9635_i2c)
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COBJS-$(CONFIG_GENERIC_LPC_TPM) = generic_lpc_tpm.o
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COBJS-$(CONFIG_GENERIC_LPC_TPM) = generic_lpc_tpm.o
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COBJS-$(CONFIG_INFINEON_TPM_I2C) += tis_i2c.o slb9635_i2c/tpm.o
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COBJS-$(CONFIG_INFINEON_TPM_I2C) += slb9635_i2c/tpm_tis_i2c.o
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COBJS := $(COBJS-y)
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COBJS := $(COBJS-y)
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SRCS := $(COBJS:.o=.c)
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SRCS := $(COBJS:.o=.c)
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51
drivers/tpm/slb9635_i2c/compatibility.h
Normal file
51
drivers/tpm/slb9635_i2c/compatibility.h
Normal file
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@ -0,0 +1,51 @@
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/*
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* Copyright (C) 2011 Infineon Technologies
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*
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* Authors:
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* Peter Huewe <huewe.external@infineon.com>
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*
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* Version: 2.1.1
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _COMPATIBILITY_H_
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#define _COMPATIBILITY_H_
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/* all includes from U-Boot */
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#include <linux/types.h>
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#include <linux/unaligned/be_byteshift.h>
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#include <asm-generic/errno.h>
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#include <compiler.h>
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#include <common.h>
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/* extended error numbers from linux (see errno.h) */
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#define ECANCELED 125 /* Operation Canceled */
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#define msleep(t) udelay((t)*1000)
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/* Timer frequency. Corresponds to msec timer resolution*/
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#define HZ 1000
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#define dev_dbg(dev, format, arg...) debug(format, ##arg)
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#define dev_err(dev, format, arg...) printf(format, ##arg)
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#define dev_info(dev, format, arg...) debug(format, ##arg)
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#define dbg_printf debug
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#endif
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453
drivers/tpm/slb9635_i2c/tpm.c
Normal file
453
drivers/tpm/slb9635_i2c/tpm.c
Normal file
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@ -0,0 +1,453 @@
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/*
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* Copyright (C) 2011 Infineon Technologies
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*
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* Authors:
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* Peter Huewe <huewe.external@infineon.com>
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*
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* Description:
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* Device driver for TCG/TCPA TPM (trusted platform module).
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* Specifications at www.trustedcomputinggroup.org
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*
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* It is based on the Linux kernel driver tpm.c from Leendert van
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* Dorn, Dave Safford, Reiner Sailer, and Kyleen Hall.
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*
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* Version: 2.1.1
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2 of the
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* License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <malloc.h>
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#include "tpm.h"
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/* global structure for tpm chip data */
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struct tpm_chip g_chip;
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enum tpm_duration {
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TPM_SHORT = 0,
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TPM_MEDIUM = 1,
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TPM_LONG = 2,
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TPM_UNDEFINED,
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};
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#define TPM_MAX_ORDINAL 243
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#define TPM_MAX_PROTECTED_ORDINAL 12
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#define TPM_PROTECTED_ORDINAL_MASK 0xFF
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/*
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* Array with one entry per ordinal defining the maximum amount
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* of time the chip could take to return the result. The ordinal
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* designation of short, medium or long is defined in a table in
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* TCG Specification TPM Main Part 2 TPM Structures Section 17. The
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* values of the SHORT, MEDIUM, and LONG durations are retrieved
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* from the chip during initialization with a call to tpm_get_timeouts.
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*/
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static const u8 tpm_protected_ordinal_duration[TPM_MAX_PROTECTED_ORDINAL] = {
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TPM_UNDEFINED, /* 0 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED, /* 5 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_SHORT, /* 10 */
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TPM_SHORT,
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};
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static const u8 tpm_ordinal_duration[TPM_MAX_ORDINAL] = {
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TPM_UNDEFINED, /* 0 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED, /* 5 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_SHORT, /* 10 */
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TPM_SHORT,
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TPM_MEDIUM,
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TPM_LONG,
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TPM_LONG,
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TPM_MEDIUM, /* 15 */
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TPM_SHORT,
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TPM_SHORT,
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TPM_MEDIUM,
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TPM_LONG,
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TPM_SHORT, /* 20 */
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TPM_SHORT,
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TPM_MEDIUM,
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TPM_MEDIUM,
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TPM_MEDIUM,
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TPM_SHORT, /* 25 */
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TPM_SHORT,
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TPM_MEDIUM,
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TPM_SHORT,
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TPM_SHORT,
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TPM_MEDIUM, /* 30 */
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TPM_LONG,
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TPM_MEDIUM,
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TPM_SHORT,
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TPM_SHORT,
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TPM_SHORT, /* 35 */
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TPM_MEDIUM,
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TPM_MEDIUM,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_MEDIUM, /* 40 */
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TPM_LONG,
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TPM_MEDIUM,
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TPM_SHORT,
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TPM_SHORT,
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TPM_SHORT, /* 45 */
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TPM_SHORT,
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TPM_SHORT,
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TPM_SHORT,
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TPM_LONG,
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TPM_MEDIUM, /* 50 */
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TPM_MEDIUM,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED, /* 55 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_MEDIUM, /* 60 */
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TPM_MEDIUM,
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TPM_MEDIUM,
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TPM_SHORT,
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TPM_SHORT,
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TPM_MEDIUM, /* 65 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_SHORT, /* 70 */
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TPM_SHORT,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED, /* 75 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_LONG, /* 80 */
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TPM_UNDEFINED,
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TPM_MEDIUM,
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TPM_LONG,
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TPM_SHORT,
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TPM_UNDEFINED, /* 85 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_SHORT, /* 90 */
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TPM_SHORT,
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TPM_SHORT,
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TPM_SHORT,
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TPM_SHORT,
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TPM_UNDEFINED, /* 95 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_MEDIUM, /* 100 */
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TPM_SHORT,
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TPM_SHORT,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED, /* 105 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_SHORT, /* 110 */
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TPM_SHORT,
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TPM_SHORT,
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TPM_SHORT,
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TPM_SHORT,
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TPM_SHORT, /* 115 */
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TPM_SHORT,
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TPM_SHORT,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_LONG, /* 120 */
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TPM_LONG,
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TPM_MEDIUM,
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TPM_UNDEFINED,
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TPM_SHORT,
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TPM_SHORT, /* 125 */
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TPM_SHORT,
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TPM_LONG,
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TPM_SHORT,
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TPM_SHORT,
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TPM_SHORT, /* 130 */
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TPM_MEDIUM,
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TPM_UNDEFINED,
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TPM_SHORT,
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TPM_MEDIUM,
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TPM_UNDEFINED, /* 135 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_SHORT, /* 140 */
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TPM_SHORT,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED, /* 145 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_SHORT, /* 150 */
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TPM_MEDIUM,
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TPM_MEDIUM,
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TPM_SHORT,
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TPM_SHORT,
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TPM_UNDEFINED, /* 155 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_SHORT, /* 160 */
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TPM_SHORT,
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TPM_SHORT,
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TPM_SHORT,
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TPM_UNDEFINED,
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TPM_UNDEFINED, /* 165 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_LONG, /* 170 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED, /* 175 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_MEDIUM, /* 180 */
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TPM_SHORT,
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TPM_MEDIUM,
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TPM_MEDIUM,
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TPM_MEDIUM,
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TPM_MEDIUM, /* 185 */
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TPM_SHORT,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED, /* 190 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED, /* 195 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_SHORT, /* 200 */
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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TPM_SHORT,
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TPM_SHORT, /* 205 */
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TPM_SHORT,
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TPM_SHORT,
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TPM_SHORT,
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TPM_SHORT,
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TPM_MEDIUM, /* 210 */
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TPM_UNDEFINED,
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TPM_MEDIUM,
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TPM_MEDIUM,
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TPM_MEDIUM,
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TPM_UNDEFINED, /* 215 */
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TPM_MEDIUM,
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TPM_UNDEFINED,
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TPM_UNDEFINED,
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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
|
||||||
|
*/
|
||||||
|
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;
|
||||||
|
}
|
||||||
|
|
||||||
|
#define TPM_CMD_COUNT_BYTE 2
|
||||||
|
#define TPM_CMD_ORDINAL_BYTE 6
|
||||||
|
|
||||||
|
ssize_t tpm_transmit(const unsigned char *buf, size_t bufsiz)
|
||||||
|
{
|
||||||
|
ssize_t 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) {
|
||||||
|
dev_err(chip->dev, "no data\n");
|
||||||
|
return -ENODATA;
|
||||||
|
}
|
||||||
|
if (count > bufsiz) {
|
||||||
|
dev_err(chip->dev,
|
||||||
|
"invalid count value %x %zx\n", count, bufsiz);
|
||||||
|
return -E2BIG;
|
||||||
|
}
|
||||||
|
|
||||||
|
rc = chip->vendor.send(chip, (u8 *)buf, count);
|
||||||
|
if (rc < 0) {
|
||||||
|
dev_err(chip->dev, "tpm_transmit: tpm_send: error %zd\n", rc);
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (chip->vendor.irq)
|
||||||
|
goto out_recv;
|
||||||
|
|
||||||
|
start = get_timer(0);
|
||||||
|
stop = tpm_calc_ordinal_duration(chip, ordinal);
|
||||||
|
do {
|
||||||
|
dbg_printf("waiting for status...\n");
|
||||||
|
u8 status = chip->vendor.status(chip);
|
||||||
|
if ((status & chip->vendor.req_complete_mask) ==
|
||||||
|
chip->vendor.req_complete_val) {
|
||||||
|
dbg_printf("...got it;\n");
|
||||||
|
goto out_recv;
|
||||||
|
}
|
||||||
|
|
||||||
|
if ((status == chip->vendor.req_canceled)) {
|
||||||
|
dev_err(chip->dev, "Operation Canceled\n");
|
||||||
|
rc = -ECANCELED;
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
msleep(TPM_TIMEOUT);
|
||||||
|
} while (get_timer(start) < stop);
|
||||||
|
|
||||||
|
chip->vendor.cancel(chip);
|
||||||
|
dev_err(chip->dev, "Operation Timed out\n");
|
||||||
|
rc = -ETIME;
|
||||||
|
goto out;
|
||||||
|
|
||||||
|
out_recv:
|
||||||
|
|
||||||
|
dbg_printf("out_recv: reading response...\n");
|
||||||
|
rc = chip->vendor.recv(chip, (u8 *)buf, TPM_BUFSIZE);
|
||||||
|
if (rc < 0)
|
||||||
|
dev_err(chip->dev, "tpm_transmit: tpm_recv: error %zd\n", rc);
|
||||||
|
out:
|
||||||
|
return rc;
|
||||||
|
}
|
||||||
|
|
||||||
|
#define TPM_ERROR_SIZE 10
|
||||||
|
|
||||||
|
enum tpm_capabilities {
|
||||||
|
TPM_CAP_PROP = cpu_to_be32(5),
|
||||||
|
};
|
||||||
|
|
||||||
|
enum tpm_sub_capabilities {
|
||||||
|
TPM_CAP_PROP_TIS_TIMEOUT = cpu_to_be32(0x115),
|
||||||
|
TPM_CAP_PROP_TIS_DURATION = cpu_to_be32(0x120),
|
||||||
|
};
|
||||||
|
|
||||||
|
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 tpm_open(uint32_t dev_addr)
|
||||||
|
{
|
||||||
|
int rc;
|
||||||
|
if (g_chip.is_open)
|
||||||
|
return -EBUSY;
|
||||||
|
rc = tpm_vendor_init(dev_addr);
|
||||||
|
if (rc < 0)
|
||||||
|
g_chip.is_open = 0;
|
||||||
|
return rc;
|
||||||
|
}
|
||||||
|
|
||||||
|
void tpm_close(void)
|
||||||
|
{
|
||||||
|
if (g_chip.is_open) {
|
||||||
|
tpm_vendor_cleanup(&g_chip);
|
||||||
|
g_chip.is_open = 0;
|
||||||
|
}
|
||||||
|
}
|
||||||
161
drivers/tpm/slb9635_i2c/tpm.h
Normal file
161
drivers/tpm/slb9635_i2c/tpm.h
Normal file
|
|
@ -0,0 +1,161 @@
|
||||||
|
/*
|
||||||
|
* Copyright (C) 2011 Infineon Technologies
|
||||||
|
*
|
||||||
|
* Authors:
|
||||||
|
* Peter Huewe <huewe.external@infineon.com>
|
||||||
|
*
|
||||||
|
* Version: 2.1.1
|
||||||
|
*
|
||||||
|
* 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.
|
||||||
|
*
|
||||||
|
*
|
||||||
|
* 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
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef _TPM_H_
|
||||||
|
#define _TPM_H_
|
||||||
|
|
||||||
|
#include <linux/compiler.h>
|
||||||
|
|
||||||
|
#include "compatibility.h"
|
||||||
|
|
||||||
|
enum tpm_timeout {
|
||||||
|
TPM_TIMEOUT = 5, /* msecs */
|
||||||
|
};
|
||||||
|
|
||||||
|
/* Size of external transmit buffer (used in tpm_transmit)*/
|
||||||
|
#define TPM_BUFSIZE 4096
|
||||||
|
|
||||||
|
/* Index of fields in TPM command buffer */
|
||||||
|
#define TPM_CMD_SIZE_BYTE 2
|
||||||
|
#define TPM_CMD_ORDINAL_BYTE 6
|
||||||
|
|
||||||
|
/* Index of Count field in TPM response buffer */
|
||||||
|
#define TPM_RSP_SIZE_BYTE 2
|
||||||
|
#define TPM_RSP_RC_BYTE 6
|
||||||
|
|
||||||
|
struct tpm_chip;
|
||||||
|
|
||||||
|
struct tpm_vendor_specific {
|
||||||
|
const u8 req_complete_mask;
|
||||||
|
const u8 req_complete_val;
|
||||||
|
const u8 req_canceled;
|
||||||
|
int irq;
|
||||||
|
int (*recv) (struct tpm_chip *, u8 *, size_t);
|
||||||
|
int (*send) (struct tpm_chip *, u8 *, size_t);
|
||||||
|
void (*cancel) (struct tpm_chip *);
|
||||||
|
u8(*status) (struct tpm_chip *);
|
||||||
|
int locality;
|
||||||
|
unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* msec */
|
||||||
|
unsigned long duration[3]; /* msec */
|
||||||
|
};
|
||||||
|
|
||||||
|
struct tpm_chip {
|
||||||
|
int is_open;
|
||||||
|
struct tpm_vendor_specific vendor;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct tpm_input_header {
|
||||||
|
__be16 tag;
|
||||||
|
__be32 length;
|
||||||
|
__be32 ordinal;
|
||||||
|
} __packed;
|
||||||
|
|
||||||
|
struct tpm_output_header {
|
||||||
|
__be16 tag;
|
||||||
|
__be32 length;
|
||||||
|
__be32 return_code;
|
||||||
|
} __packed;
|
||||||
|
|
||||||
|
struct timeout_t {
|
||||||
|
__be32 a;
|
||||||
|
__be32 b;
|
||||||
|
__be32 c;
|
||||||
|
__be32 d;
|
||||||
|
} __packed;
|
||||||
|
|
||||||
|
struct duration_t {
|
||||||
|
__be32 tpm_short;
|
||||||
|
__be32 tpm_medium;
|
||||||
|
__be32 tpm_long;
|
||||||
|
} __packed;
|
||||||
|
|
||||||
|
union cap_t {
|
||||||
|
struct timeout_t timeout;
|
||||||
|
struct duration_t duration;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct tpm_getcap_params_in {
|
||||||
|
__be32 cap;
|
||||||
|
__be32 subcap_size;
|
||||||
|
__be32 subcap;
|
||||||
|
} __packed;
|
||||||
|
|
||||||
|
struct tpm_getcap_params_out {
|
||||||
|
__be32 cap_size;
|
||||||
|
union cap_t cap;
|
||||||
|
} __packed;
|
||||||
|
|
||||||
|
union tpm_cmd_header {
|
||||||
|
struct tpm_input_header in;
|
||||||
|
struct tpm_output_header out;
|
||||||
|
};
|
||||||
|
|
||||||
|
union tpm_cmd_params {
|
||||||
|
struct tpm_getcap_params_out getcap_out;
|
||||||
|
struct tpm_getcap_params_in getcap_in;
|
||||||
|
};
|
||||||
|
|
||||||
|
struct tpm_cmd_t {
|
||||||
|
union tpm_cmd_header header;
|
||||||
|
union tpm_cmd_params params;
|
||||||
|
} __packed;
|
||||||
|
|
||||||
|
|
||||||
|
/* ---------- Interface for TPM vendor ------------ */
|
||||||
|
|
||||||
|
extern struct tpm_chip *tpm_register_hardware(
|
||||||
|
const struct tpm_vendor_specific *);
|
||||||
|
|
||||||
|
extern int tpm_vendor_init(uint32_t dev_addr);
|
||||||
|
|
||||||
|
extern void tpm_vendor_cleanup(struct tpm_chip *chip);
|
||||||
|
|
||||||
|
/* ---------- Interface for TDDL ------------------- */
|
||||||
|
|
||||||
|
/*
|
||||||
|
* if dev_addr != 0 - redefines TPM device address
|
||||||
|
* Returns < 0 on error, 0 on success.
|
||||||
|
*/
|
||||||
|
extern int tpm_open(uint32_t dev_addr);
|
||||||
|
|
||||||
|
extern void tpm_close(void);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Transmit bufsiz bytes out of buf to TPM and get results back in buf, too.
|
||||||
|
* Returns < 0 on error, 0 on success.
|
||||||
|
*/
|
||||||
|
extern ssize_t tpm_transmit(const unsigned char *buf, size_t bufsiz);
|
||||||
|
|
||||||
|
#endif
|
||||||
561
drivers/tpm/slb9635_i2c/tpm_tis_i2c.c
Normal file
561
drivers/tpm/slb9635_i2c/tpm_tis_i2c.c
Normal file
|
|
@ -0,0 +1,561 @@
|
||||||
|
/*
|
||||||
|
* 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 <common.h>
|
||||||
|
#include <i2c.h>
|
||||||
|
#include <linux/types.h>
|
||||||
|
|
||||||
|
#include "compatibility.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 0x000b15d1L
|
||||||
|
|
||||||
|
/* Structure to store I2C TPM specific stuff */
|
||||||
|
struct tpm_inf_dev {
|
||||||
|
uint addr;
|
||||||
|
u8 buf[TPM_BUFSIZE + sizeof(u8)]; /* max. buffer size + addr */
|
||||||
|
};
|
||||||
|
|
||||||
|
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.
|
||||||
|
*/
|
||||||
|
int iic_tpm_read(u8 addr, u8 *buffer, size_t len)
|
||||||
|
{
|
||||||
|
int rc;
|
||||||
|
int count;
|
||||||
|
uint myaddr = addr;
|
||||||
|
/* we have to use uint here, uchar hangs the board */
|
||||||
|
|
||||||
|
for (count = 0; count < MAX_COUNT; count++) {
|
||||||
|
rc = i2c_write(tpm_dev.addr, 0, 0, (uchar *)&myaddr, 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.addr, 0, 0, buffer, len);
|
||||||
|
if (rc == 0)
|
||||||
|
break; /*success, break to skip sleep*/
|
||||||
|
}
|
||||||
|
|
||||||
|
if (rc)
|
||||||
|
return -rc;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int iic_tpm_write_generic(u8 addr, u8 *buffer, size_t len,
|
||||||
|
unsigned int sleep_time,
|
||||||
|
u8 max_count)
|
||||||
|
{
|
||||||
|
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);
|
||||||
|
if (rc == 0)
|
||||||
|
break; /*success, break to skip sleep*/
|
||||||
|
|
||||||
|
udelay(sleep_time);
|
||||||
|
}
|
||||||
|
|
||||||
|
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(u8 addr, u8 *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(u8 addr, u8 *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,
|
||||||
|
};
|
||||||
|
|
||||||
|
enum tis_defaults {
|
||||||
|
TIS_SHORT_TIMEOUT = 750, /* ms */
|
||||||
|
TIS_LONG_TIMEOUT = 2000, /* 2 sec */
|
||||||
|
};
|
||||||
|
|
||||||
|
#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)
|
||||||
|
{
|
||||||
|
u8 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)
|
||||||
|
{
|
||||||
|
u8 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)
|
||||||
|
{
|
||||||
|
unsigned long start, stop;
|
||||||
|
u8 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 */
|
||||||
|
start = get_timer(0);
|
||||||
|
stop = chip->vendor.timeout_a;
|
||||||
|
do {
|
||||||
|
if (check_locality(chip, loc) >= 0)
|
||||||
|
return loc;
|
||||||
|
msleep(TPM_TIMEOUT);
|
||||||
|
} while (get_timer(start) < stop);
|
||||||
|
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
static u8 tpm_tis_i2c_status(struct tpm_chip *chip)
|
||||||
|
{
|
||||||
|
/* NOTE: since i2c read may fail, return 0 in this case --> time-out */
|
||||||
|
u8 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 */
|
||||||
|
u8 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)
|
||||||
|
{
|
||||||
|
unsigned long start, stop;
|
||||||
|
ssize_t burstcnt;
|
||||||
|
u8 buf[3];
|
||||||
|
|
||||||
|
/* wait for burstcount */
|
||||||
|
/* which timeout value, spec has 2 answers (c & d) */
|
||||||
|
start = get_timer(0);
|
||||||
|
stop = chip->vendor.timeout_d;
|
||||||
|
do {
|
||||||
|
/* 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;
|
||||||
|
msleep(TPM_TIMEOUT);
|
||||||
|
} while (get_timer(start) < stop);
|
||||||
|
|
||||||
|
return -EBUSY;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
|
||||||
|
int *status)
|
||||||
|
{
|
||||||
|
unsigned long start, stop;
|
||||||
|
|
||||||
|
/* check current status */
|
||||||
|
*status = tpm_tis_i2c_status(chip);
|
||||||
|
if ((*status & mask) == mask)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
start = get_timer(0);
|
||||||
|
stop = timeout;
|
||||||
|
do {
|
||||||
|
msleep(TPM_TIMEOUT);
|
||||||
|
*status = tpm_tis_i2c_status(chip);
|
||||||
|
if ((*status & mask) == mask)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
} while (get_timer(start) < stop);
|
||||||
|
|
||||||
|
return -ETIME;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int recv_data(struct tpm_chip *chip, u8 *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, u8 *buf, size_t count)
|
||||||
|
{
|
||||||
|
int size = 0;
|
||||||
|
int expected, status;
|
||||||
|
|
||||||
|
if (count < TPM_HEADER_SIZE) {
|
||||||
|
size = -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) {
|
||||||
|
dev_err(chip->dev, "Unable to read header\n");
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
expected = get_unaligned_be32(buf + TPM_RSP_SIZE_BYTE);
|
||||||
|
if ((size_t)expected > count) {
|
||||||
|
size = -EIO;
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
size += recv_data(chip, &buf[TPM_HEADER_SIZE],
|
||||||
|
expected - TPM_HEADER_SIZE);
|
||||||
|
if (size < expected) {
|
||||||
|
dev_err(chip->dev, "Unable to read remainder of result\n");
|
||||||
|
size = -ETIME;
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
wait_for_stat(chip, TPM_STS_VALID, chip->vendor.timeout_c, &status);
|
||||||
|
if (status & TPM_STS_DATA_AVAIL) { /* retry? */
|
||||||
|
dev_err(chip->dev, "Error left over data\n");
|
||||||
|
size = -EIO;
|
||||||
|
goto out;
|
||||||
|
}
|
||||||
|
|
||||||
|
out:
|
||||||
|
tpm_tis_i2c_ready(chip);
|
||||||
|
/* The TPM needs some time to clean up here,
|
||||||
|
* so we sleep rather than keeping the bus busy
|
||||||
|
*/
|
||||||
|
udelay(2000);
|
||||||
|
release_locality(chip, chip->vendor.locality, 0);
|
||||||
|
|
||||||
|
return size;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int tpm_tis_i2c_send(struct tpm_chip *chip, u8 *buf, size_t len)
|
||||||
|
{
|
||||||
|
int rc, status;
|
||||||
|
ssize_t burstcnt;
|
||||||
|
size_t count = 0;
|
||||||
|
u8 sts = TPM_STS_GO;
|
||||||
|
|
||||||
|
if (len > TPM_BUFSIZE)
|
||||||
|
return -E2BIG; /* command is too long for our tpm, sorry */
|
||||||
|
|
||||||
|
if (request_locality(chip, 0) < 0)
|
||||||
|
return -EBUSY;
|
||||||
|
|
||||||
|
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,
|
||||||
|
chip->vendor.timeout_b, &status) < 0) {
|
||||||
|
rc = -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,
|
||||||
|
chip->vendor.timeout_c, &status);
|
||||||
|
|
||||||
|
if ((status & TPM_STS_DATA_EXPECT) == 0) {
|
||||||
|
rc = -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, 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);
|
||||||
|
|
||||||
|
return len;
|
||||||
|
out_err:
|
||||||
|
tpm_tis_i2c_ready(chip);
|
||||||
|
/* The TPM needs some time to clean up here,
|
||||||
|
* so we sleep rather than keeping the bus busy
|
||||||
|
*/
|
||||||
|
udelay(2000);
|
||||||
|
release_locality(chip, chip->vendor.locality, 0);
|
||||||
|
|
||||||
|
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(uint32_t dev_addr)
|
||||||
|
{
|
||||||
|
u32 vendor;
|
||||||
|
uint old_addr;
|
||||||
|
int rc = 0;
|
||||||
|
struct tpm_chip *chip;
|
||||||
|
|
||||||
|
old_addr = tpm_dev.addr;
|
||||||
|
if (dev_addr != 0)
|
||||||
|
tpm_dev.addr = dev_addr;
|
||||||
|
|
||||||
|
chip = tpm_register_hardware(&tpm_tis_i2c);
|
||||||
|
if (chip < 0) {
|
||||||
|
rc = -ENODEV;
|
||||||
|
goto out_err;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Disable interrupts (not supported) */
|
||||||
|
chip->vendor.irq = 0;
|
||||||
|
|
||||||
|
/* Default timeouts */
|
||||||
|
chip->vendor.timeout_a = TIS_SHORT_TIMEOUT;
|
||||||
|
chip->vendor.timeout_b = TIS_LONG_TIMEOUT;
|
||||||
|
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;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* read four bytes from DID_VID register */
|
||||||
|
if (iic_tpm_read(TPM_DID_VID(0), (uchar *)&vendor, 4) < 0) {
|
||||||
|
rc = -EIO;
|
||||||
|
goto out_release;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* create DID_VID register value, after swapping to little-endian */
|
||||||
|
vendor = be32_to_cpu(vendor);
|
||||||
|
|
||||||
|
if (vendor != TPM_TIS_I2C_DID_VID) {
|
||||||
|
rc = -ENODEV;
|
||||||
|
goto out_release;
|
||||||
|
}
|
||||||
|
|
||||||
|
dev_info(dev, "1.2 TPM (device-id 0x%X)\n", 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);
|
||||||
|
}
|
||||||
181
drivers/tpm/tis_i2c.c
Normal file
181
drivers/tpm/tis_i2c.c
Normal file
|
|
@ -0,0 +1,181 @@
|
||||||
|
/*
|
||||||
|
* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
|
||||||
|
* Use of this source code is governed by a BSD-style license that can be
|
||||||
|
* found in the LICENSE file.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <config.h>
|
||||||
|
#include <common.h>
|
||||||
|
#include <fdtdec.h>
|
||||||
|
#include <i2c.h>
|
||||||
|
#include "slb9635_i2c/tpm.h"
|
||||||
|
|
||||||
|
DECLARE_GLOBAL_DATA_PTR;
|
||||||
|
|
||||||
|
/* TPM configuration */
|
||||||
|
struct tpm {
|
||||||
|
int i2c_bus;
|
||||||
|
int slave_addr;
|
||||||
|
char inited;
|
||||||
|
int old_bus;
|
||||||
|
} tpm;
|
||||||
|
|
||||||
|
|
||||||
|
static int tpm_select(void)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
tpm.old_bus = i2c_get_bus_num();
|
||||||
|
if (tpm.old_bus != tpm.i2c_bus) {
|
||||||
|
ret = i2c_set_bus_num(tpm.i2c_bus);
|
||||||
|
if (ret) {
|
||||||
|
debug("%s: Fail to set i2c bus %d\n", __func__,
|
||||||
|
tpm.i2c_bus);
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int tpm_deselect(void)
|
||||||
|
{
|
||||||
|
int ret;
|
||||||
|
|
||||||
|
if (tpm.old_bus != i2c_get_bus_num()) {
|
||||||
|
ret = i2c_set_bus_num(tpm.old_bus);
|
||||||
|
if (ret) {
|
||||||
|
debug("%s: Fail to restore i2c bus %d\n",
|
||||||
|
__func__, tpm.old_bus);
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
tpm.old_bus = -1;
|
||||||
|
return 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)
|
||||||
|
{
|
||||||
|
#ifdef CONFIG_OF_CONTROL
|
||||||
|
const void *blob = gd->fdt_blob;
|
||||||
|
int node, parent;
|
||||||
|
int i2c_bus;
|
||||||
|
|
||||||
|
node = fdtdec_next_compatible(blob, 0, COMPAT_INFINEON_SLB9635_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;
|
||||||
|
}
|
||||||
|
i2c_bus = i2c_get_bus_num_fdt(parent);
|
||||||
|
if (i2c_bus < 0)
|
||||||
|
return -1;
|
||||||
|
dev->i2c_bus = i2c_bus;
|
||||||
|
dev->slave_addr = fdtdec_get_addr(blob, node, "reg");
|
||||||
|
#else
|
||||||
|
dev->i2c_bus = CONFIG_INFINEON_TPM_I2C_BUS;
|
||||||
|
dev->slave_addr = CONFIG_INFINEON_TPM_I2C_ADDR;
|
||||||
|
#endif
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int tis_init(void)
|
||||||
|
{
|
||||||
|
if (tpm.inited)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
if (tpm_decode_config(&tpm))
|
||||||
|
return -1;
|
||||||
|
|
||||||
|
if (tpm_select())
|
||||||
|
return -1;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Probe TPM twice; the first probing might fail because TPM is asleep,
|
||||||
|
* and the probing can wake up TPM.
|
||||||
|
*/
|
||||||
|
if (i2c_probe(tpm.slave_addr) && i2c_probe(tpm.slave_addr)) {
|
||||||
|
debug("%s: fail to probe i2c addr 0x%x\n", __func__,
|
||||||
|
tpm.slave_addr);
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
tpm_deselect();
|
||||||
|
|
||||||
|
tpm.inited = 1;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
int tis_open(void)
|
||||||
|
{
|
||||||
|
int rc;
|
||||||
|
|
||||||
|
if (!tpm.inited)
|
||||||
|
return -1;
|
||||||
|
|
||||||
|
if (tpm_select())
|
||||||
|
return -1;
|
||||||
|
|
||||||
|
rc = tpm_open(tpm.slave_addr);
|
||||||
|
|
||||||
|
tpm_deselect();
|
||||||
|
|
||||||
|
return rc;
|
||||||
|
}
|
||||||
|
|
||||||
|
int tis_close(void)
|
||||||
|
{
|
||||||
|
if (!tpm.inited)
|
||||||
|
return -1;
|
||||||
|
|
||||||
|
if (tpm_select())
|
||||||
|
return -1;
|
||||||
|
|
||||||
|
tpm_close();
|
||||||
|
|
||||||
|
tpm_deselect();
|
||||||
|
|
||||||
|
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);
|
||||||
|
|
||||||
|
if (tpm_select())
|
||||||
|
return -1;
|
||||||
|
|
||||||
|
len = tpm_transmit(buf, sbuf_size);
|
||||||
|
|
||||||
|
tpm_deselect();
|
||||||
|
|
||||||
|
if (len < 10) {
|
||||||
|
*rbuf_len = 0;
|
||||||
|
return -1;
|
||||||
|
}
|
||||||
|
|
||||||
|
memcpy(recvbuf, buf, len);
|
||||||
|
*rbuf_len = len;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
@ -90,6 +90,7 @@ enum fdt_compat_id {
|
||||||
COMPAT_MAXIM_MAX77686_PMIC, /* MAX77686 PMIC */
|
COMPAT_MAXIM_MAX77686_PMIC, /* MAX77686 PMIC */
|
||||||
COMPAT_GENERIC_SPI_FLASH, /* Generic SPI Flash chip */
|
COMPAT_GENERIC_SPI_FLASH, /* Generic SPI Flash chip */
|
||||||
COMPAT_MAXIM_98095_CODEC, /* MAX98095 Codec */
|
COMPAT_MAXIM_98095_CODEC, /* MAX98095 Codec */
|
||||||
|
COMPAT_INFINEON_SLB9635_TPM, /* Infineon SLB9635 TPM */
|
||||||
|
|
||||||
COMPAT_COUNT,
|
COMPAT_COUNT,
|
||||||
};
|
};
|
||||||
|
|
|
||||||
|
|
@ -63,6 +63,7 @@ static const char * const compat_names[COMPAT_COUNT] = {
|
||||||
COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"),
|
COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"),
|
||||||
COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
|
COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
|
||||||
COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
|
COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
|
||||||
|
COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"),
|
||||||
};
|
};
|
||||||
|
|
||||||
const char *fdtdec_get_compatible(enum fdt_compat_id id)
|
const char *fdtdec_get_compatible(enum fdt_compat_id id)
|
||||||
|
|
|
||||||
Loading…
Reference in a new issue