Hi Marek, On Sun, Sep 30, 2012 at 11:09 AM, Marek Vasut <ma...@denx.de> wrote: > Dear Vadim Bendebury, > >> On Sun, Sep 30, 2012 at 10:36 AM, Marek Vasut <ma...@denx.de> wrote: >> > The driver is not used anywhere. It is a dead code and it seems to >> > be falling apart slowly due to bitrot. Remove this driver. >> >> This driver is used in several chromeOS devices which have not quite made >> it upstream yet. Why does it seem falling apart? > > Noone tested it every since, it seems unmaintained to me. This it is only > logical to drop it if there are no users. Will the chromium devices ever make > it > upstream?
The TPM code is used by coreboot and Tegra Seaboard, both of which are upstream. We are working hard on a third :-) If there is a build problem, please can you let us know? Regards, Simon > >> cheers, >> /vb >> >> > Signed-off-by: Marek Vasut <ma...@denx.de> >> > Cc: Vadim Bendebury <vben...@chromium.org> >> > Cc: Tom Rini <tr...@ti.com> >> > --- >> > >> > Makefile | 1 - >> > README | 10 - >> > drivers/tpm/Makefile | 43 ---- >> > drivers/tpm/generic_lpc_tpm.c | 495 >> > >> > ----------------------------------------- >> > >> > include/tpm.h | 71 ------ >> > 5 files changed, 620 deletions(-) >> > delete mode 100644 drivers/tpm/Makefile >> > delete mode 100644 drivers/tpm/generic_lpc_tpm.c >> > delete mode 100644 include/tpm.h >> > >> > diff --git a/Makefile b/Makefile >> > index a40d4cc..1325be0 100644 >> > --- a/Makefile >> > +++ b/Makefile >> > @@ -293,7 +293,6 @@ LIBS-y += arch/powerpc/cpu/mpc8xxx/lib8xxx.o >> > >> > endif >> > LIBS-y += drivers/rtc/librtc.o >> > LIBS-y += drivers/serial/libserial.o >> > >> > -LIBS-$(CONFIG_GENERIC_LPC_TPM) += drivers/tpm/libtpm.o >> > >> > LIBS-y += drivers/twserial/libtws.o >> > LIBS-y += drivers/usb/eth/libusb_eth.o >> > LIBS-y += drivers/usb/gadget/libusb_gadget.o >> > >> > diff --git a/README b/README >> > index a745d0b..c4ad6d8 100644 >> > --- a/README >> > +++ b/README >> > >> > @@ -1149,16 +1149,6 @@ The following options need to be configured: >> > CONFIG_SH_ETHER_CACHE_WRITEBACK >> > If this option is set, the driver enables cache >> > >> > flush. >> > >> > -- TPM Support: >> > - CONFIG_GENERIC_LPC_TPM >> > - Support for generic parallel port TPM devices. Only one >> > device >> > - per system is supported at this time. >> > - >> > - CONFIG_TPM_TIS_BASE_ADDRESS >> > - Base address where the generic TPM device is >> > mapped - to. Contemporary x86 systems usually map >> > it at - 0xfed40000. >> > - >> > >> > - USB Support: >> > At the moment only the UHCI host controller is >> > supported (PIP405, MIP405, MPC5200); define >> > >> > diff --git a/drivers/tpm/Makefile b/drivers/tpm/Makefile >> > deleted file mode 100644 >> > index be11c8b..0000000 >> > --- a/drivers/tpm/Makefile >> > +++ /dev/null >> > @@ -1,43 +0,0 @@ >> > -# Copyright (c) 2011 The Chromium OS Authors. All rights reserved. >> > -# >> > -# 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; either version 2 of >> > -# the License, or (at your option) any later version. >> > -# >> > -# 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 $(TOPDIR)/config.mk >> > - >> > -LIB := $(obj)libtpm.o >> > - >> > -COBJS-$(CONFIG_GENERIC_LPC_TPM) = generic_lpc_tpm.o >> > - >> > -COBJS := $(COBJS-y) >> > -SRCS := $(COBJS:.o=.c) >> > -OBJS := $(addprefix $(obj),$(COBJS)) >> > - >> > -all: $(LIB) >> > - >> > -$(LIB): $(obj).depend $(OBJS) >> > - $(call cmd_link_o_target, $(OBJS)) >> > - >> > -######################################################################## >> > # - >> > -include $(SRCTREE)/rules.mk >> > - >> > -sinclude $(obj).depend >> > - >> > -######################################################################## >> > # diff --git a/drivers/tpm/generic_lpc_tpm.c >> > b/drivers/tpm/generic_lpc_tpm.c deleted file mode 100644 >> > index 6c494eb..0000000 >> > --- a/drivers/tpm/generic_lpc_tpm.c >> > +++ /dev/null >> > @@ -1,495 +0,0 @@ >> > -/* >> > - * Copyright (c) 2011 The Chromium OS Authors. >> > - * >> > - * 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; either version 2 of >> > - * the License, or (at your option) any later version. >> > - * >> > - * 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 >> > - */ >> > - >> > -/* >> > - * The code in this file is based on the article "Writing a TPM Device >> > Driver" >> > - * published on http://ptgmedia.pearsoncmg.com. >> > - * >> > - * One principal difference is that in the simplest config the other >> > than 0 >> > - * TPM localities do not get mapped by some devices (for instance, by >> > Infineon >> > - * slb9635), so this driver provides access to locality 0 only. >> > - */ >> > - >> > -#include <common.h> >> > -#include <asm/io.h> >> > -#include <tpm.h> >> > - >> > -#define PREFIX "lpc_tpm: " >> > - >> > -struct tpm_locality { >> > - u32 access; >> > - u8 padding0[4]; >> > - u32 int_enable; >> > - u8 vector; >> > - u8 padding1[3]; >> > - u32 int_status; >> > - u32 int_capability; >> > - u32 tpm_status; >> > - u8 padding2[8]; >> > - u8 data; >> > - u8 padding3[3803]; >> > - u32 did_vid; >> > - u8 rid; >> > - u8 padding4[251]; >> > -}; >> > - >> > -/* >> > - * This pointer refers to the TPM chip, 5 of its localities are mapped >> > as an >> > - * array. >> > - */ >> > -#define TPM_TOTAL_LOCALITIES 5 >> > -static struct tpm_locality *lpc_tpm_dev = >> > - (struct tpm_locality *)CONFIG_TPM_TIS_BASE_ADDRESS; >> > - >> > -/* Some registers' bit field definitions */ >> > -#define TIS_STS_VALID (1 << 7) /* 0x80 */ >> > -#define TIS_STS_COMMAND_READY (1 << 6) /* 0x40 */ >> > -#define TIS_STS_TPM_GO (1 << 5) /* 0x20 */ >> > -#define TIS_STS_DATA_AVAILABLE (1 << 4) /* 0x10 */ >> > -#define TIS_STS_EXPECT (1 << 3) /* 0x08 */ >> > -#define TIS_STS_RESPONSE_RETRY (1 << 1) /* 0x02 */ >> > - >> > -#define TIS_ACCESS_TPM_REG_VALID_STS (1 << 7) /* 0x80 */ >> > -#define TIS_ACCESS_ACTIVE_LOCALITY (1 << 5) /* 0x20 */ >> > -#define TIS_ACCESS_BEEN_SEIZED (1 << 4) /* 0x10 */ >> > -#define TIS_ACCESS_SEIZE (1 << 3) /* 0x08 */ >> > -#define TIS_ACCESS_PENDING_REQUEST (1 << 2) /* 0x04 */ >> > -#define TIS_ACCESS_REQUEST_USE (1 << 1) /* 0x02 */ >> > -#define TIS_ACCESS_TPM_ESTABLISHMENT (1 << 0) /* 0x01 */ >> > - >> > -#define TIS_STS_BURST_COUNT_MASK (0xffff) >> > -#define TIS_STS_BURST_COUNT_SHIFT (8) >> > - >> > -/* >> > - * Error value returned if a tpm register does not enter the expected >> > state >> > - * after continuous polling. No actual TPM register reading ever returns >> > -1, >> > - * so this value is a safe error indication to be mixed with possible >> > status >> > - * register values. >> > - */ >> > -#define TPM_TIMEOUT_ERR (-1) >> > - >> > -/* Error value returned on various TPM driver errors. */ >> > -#define TPM_DRIVER_ERR (1) >> > - >> > - /* 1 second is plenty for anything TPM does. */ >> > -#define MAX_DELAY_US (1000 * 1000) >> > - >> > -/* Retrieve burst count value out of the status register contents. */ >> > -static u16 burst_count(u32 status) >> > -{ >> > - return (status >> TIS_STS_BURST_COUNT_SHIFT) & >> > TIS_STS_BURST_COUNT_MASK; >> > -} >> > - >> > -/* >> > - * Structures defined below allow creating descriptions of TPM >> > vendor/device >> > - * ID information for run time discovery. The only device the system >> > knows - * about at this time is Infineon slb9635. >> > - */ >> > -struct device_name { >> > - u16 dev_id; >> > - const char * const dev_name; >> > -}; >> > - >> > -struct vendor_name { >> > - u16 vendor_id; >> > - const char *vendor_name; >> > - const struct device_name *dev_names; >> > -}; >> > - >> > -static const struct device_name infineon_devices[] = { >> > - {0xb, "SLB9635 TT 1.2"}, >> > - {0} >> > -}; >> > - >> > -static const struct vendor_name vendor_names[] = { >> > - {0x15d1, "Infineon", infineon_devices}, >> > -}; >> > - >> > -/* >> > - * Cached vendor/device ID pair to indicate that the device has been >> > already >> > - * discovered. >> > - */ >> > -static u32 vendor_dev_id; >> > - >> > -/* TPM access wrappers to support tracing */ >> > -static u8 tpm_read_byte(const u8 *ptr) >> > -{ >> > - u8 ret = readb(ptr); >> > - debug(PREFIX "Read reg 0x%4.4x returns 0x%2.2x\n", >> > - (u32)ptr - (u32)lpc_tpm_dev, ret); >> > - return ret; >> > -} >> > - >> > -static u32 tpm_read_word(const u32 *ptr) >> > -{ >> > - u32 ret = readl(ptr); >> > - debug(PREFIX "Read reg 0x%4.4x returns 0x%8.8x\n", >> > - (u32)ptr - (u32)lpc_tpm_dev, ret); >> > - return ret; >> > -} >> > - >> > -static void tpm_write_byte(u8 value, u8 *ptr) >> > -{ >> > - debug(PREFIX "Write reg 0x%4.4x with 0x%2.2x\n", >> > - (u32)ptr - (u32)lpc_tpm_dev, value); >> > - writeb(value, ptr); >> > -} >> > - >> > -static void tpm_write_word(u32 value, u32 *ptr) >> > -{ >> > - debug(PREFIX "Write reg 0x%4.4x with 0x%8.8x\n", >> > - (u32)ptr - (u32)lpc_tpm_dev, value); >> > - writel(value, ptr); >> > -} >> > - >> > -/* >> > - * tis_wait_reg() >> > - * >> > - * Wait for at least a second for a register to change its state to >> > match the >> > - * expected state. Normally the transition happens within microseconds. >> > - * >> > - * @reg - pointer to the TPM register >> > - * @mask - bitmask for the bitfield(s) to watch >> > - * @expected - value the field(s) are supposed to be set to >> > - * >> > - * Returns the register contents in case the expected value was found in >> > the >> > - * appropriate register bits, or TPM_TIMEOUT_ERR on timeout. >> > - */ >> > -static u32 tis_wait_reg(u32 *reg, u8 mask, u8 expected) >> > -{ >> > - u32 time_us = MAX_DELAY_US; >> > - >> > - while (time_us > 0) { >> > - u32 value = tpm_read_word(reg); >> > - if ((value & mask) == expected) >> > - return value; >> > - udelay(1); /* 1 us */ >> > - time_us--; >> > - } >> > - return TPM_TIMEOUT_ERR; >> > -} >> > - >> > -/* >> > - * Probe the TPM device and try determining its manufacturer/device >> > name. - * >> > - * Returns 0 on success (the device is found or was found during an >> > earlier >> > - * invocation) or TPM_DRIVER_ERR if the device is not found. >> > - */ >> > -int tis_init(void) >> > -{ >> > - u32 didvid = tpm_read_word(&lpc_tpm_dev[0].did_vid); >> > - int i; >> > - const char *device_name = "unknown"; >> > - const char *vendor_name = device_name; >> > - u16 vid, did; >> > - >> > - if (vendor_dev_id) >> > - return 0; /* Already probed. */ >> > - >> > - if (!didvid || (didvid == 0xffffffff)) { >> > - printf("%s: No TPM device found\n", __func__); >> > - return TPM_DRIVER_ERR; >> > - } >> > - >> > - vendor_dev_id = didvid; >> > - >> > - vid = didvid & 0xffff; >> > - did = (didvid >> 16) & 0xffff; >> > - for (i = 0; i < ARRAY_SIZE(vendor_names); i++) { >> > - int j = 0; >> > - u16 known_did; >> > - >> > - if (vid == vendor_names[i].vendor_id) >> > - vendor_name = vendor_names[i].vendor_name; >> > - >> > - while ((known_did = vendor_names[i].dev_names[j].dev_id) >> > != 0) { >> > - if (known_did == did) { >> > - device_name = >> > - >> > vendor_names[i].dev_names[j].dev_name; >> > - break; >> > - } >> > - j++; >> > - } >> > - break; >> > - } >> > - >> > - printf("Found TPM %s by %s\n", device_name, vendor_name); >> > - return 0; >> > -} >> > - >> > -/* >> > - * tis_senddata() >> > - * >> > - * send the passed in data to the TPM device. >> > - * >> > - * @data - address of the data to send, byte by byte >> > - * @len - length of the data to send >> > - * >> > - * Returns 0 on success, TPM_DRIVER_ERR on error (in case the device >> > does - * not accept the entire command). >> > - */ >> > -static u32 tis_senddata(const u8 * const data, u32 len) >> > -{ >> > - u32 offset = 0; >> > - u16 burst = 0; >> > - u32 max_cycles = 0; >> > - u8 locality = 0; >> > - u32 value; >> > - >> > - value = tis_wait_reg(&lpc_tpm_dev[locality].tpm_status, >> > - TIS_STS_COMMAND_READY, >> > TIS_STS_COMMAND_READY); - if (value == TPM_TIMEOUT_ERR) { >> > - printf("%s:%d - failed to get 'command_ready' status\n", >> > - __FILE__, __LINE__); >> > - return TPM_DRIVER_ERR; >> > - } >> > - burst = burst_count(value); >> > - >> > - while (1) { >> > - unsigned count; >> > - >> > - /* Wait till the device is ready to accept more data. */ >> > - while (!burst) { >> > - if (max_cycles++ == MAX_DELAY_US) { >> > - printf("%s:%d failed to feed %d bytes of >> > %d\n", >> > - __FILE__, __LINE__, len - offset, >> > len); >> > - return TPM_DRIVER_ERR; >> > - } >> > - udelay(1); >> > - burst = burst_count(tpm_read_word(&lpc_tpm_dev >> > - >> > >> > [locality].tpm_status)); >> > >> > - } >> > - >> > - max_cycles = 0; >> > - >> > - /* >> > - * Calculate number of bytes the TPM is ready to accept >> > in one >> > - * shot. >> > - * >> > - * We want to send the last byte outside of the loop >> > (hence - * the -1 below) to make sure that the 'expected' >> > status bit >> > - * changes to zero exactly after the last byte is fed >> > into the >> > - * FIFO. >> > - */ >> > - count = min(burst, len - offset - 1); >> > - while (count--) >> > - tpm_write_byte(data[offset++], >> > - &lpc_tpm_dev[locality].data); >> > - >> > - value = tis_wait_reg(&lpc_tpm_dev[locality].tpm_status, >> > - TIS_STS_VALID, TIS_STS_VALID); >> > - >> > - if ((value == TPM_TIMEOUT_ERR) || !(value & >> > TIS_STS_EXPECT)) { >> > - printf("%s:%d TPM command feed overflow\n", >> > - __FILE__, __LINE__); >> > - return TPM_DRIVER_ERR; >> > - } >> > - >> > - burst = burst_count(value); >> > - if ((offset == (len - 1)) && burst) { >> > - /* >> > - * We need to be able to send the last byte to >> > the - * device, so burst size must be nonzero >> > before we - * break out. >> > - */ >> > - break; >> > - } >> > - } >> > - >> > - /* Send the last byte. */ >> > - tpm_write_byte(data[offset++], &lpc_tpm_dev[locality].data); >> > - /* >> > - * Verify that TPM does not expect any more data as part of this >> > - * command. >> > - */ >> > - value = tis_wait_reg(&lpc_tpm_dev[locality].tpm_status, >> > - TIS_STS_VALID, TIS_STS_VALID); >> > - if ((value == TPM_TIMEOUT_ERR) || (value & TIS_STS_EXPECT)) { >> > - printf("%s:%d unexpected TPM status 0x%x\n", >> > - __FILE__, __LINE__, value); >> > - return TPM_DRIVER_ERR; >> > - } >> > - >> > - /* OK, sitting pretty, let's start the command execution. */ >> > - tpm_write_word(TIS_STS_TPM_GO, >> > &lpc_tpm_dev[locality].tpm_status); - return 0; >> > -} >> > - >> > -/* >> > - * tis_readresponse() >> > - * >> > - * read the TPM device response after a command was issued. >> > - * >> > - * @buffer - address where to read the response, byte by byte. >> > - * @len - pointer to the size of buffer >> > - * >> > - * On success stores the number of received bytes to len and returns 0. >> > On - * errors (misformatted TPM data or synchronization problems) >> > returns - * TPM_DRIVER_ERR. >> > - */ >> > -static u32 tis_readresponse(u8 *buffer, u32 *len) >> > -{ >> > - u16 burst; >> > - u32 value; >> > - u32 offset = 0; >> > - u8 locality = 0; >> > - const u32 has_data = TIS_STS_DATA_AVAILABLE | TIS_STS_VALID; >> > - u32 expected_count = *len; >> > - int max_cycles = 0; >> > - >> > - /* Wait for the TPM to process the command. */ >> > - value = tis_wait_reg(&lpc_tpm_dev[locality].tpm_status, >> > - has_data, has_data); >> > - if (value == TPM_TIMEOUT_ERR) { >> > - printf("%s:%d failed processing command\n", >> > - __FILE__, __LINE__); >> > - return TPM_DRIVER_ERR; >> > - } >> > - >> > - do { >> > - while ((burst = burst_count(value)) == 0) { >> > - if (max_cycles++ == MAX_DELAY_US) { >> > - printf("%s:%d TPM stuck on read\n", >> > - __FILE__, __LINE__); >> > - return TPM_DRIVER_ERR; >> > - } >> > - udelay(1); >> > - value = tpm_read_word(&lpc_tpm_dev >> > - [locality].tpm_status); >> > - } >> > - >> > - max_cycles = 0; >> > - >> > - while (burst-- && (offset < expected_count)) { >> > - buffer[offset++] = tpm_read_byte(&lpc_tpm_dev >> > - >> > [locality].data); - >> > - if (offset == 6) { >> > - /* >> > - * We got the first six bytes of the >> > reply, - * let's figure out how many >> > bytes to expect >> > - * total - it is stored as a 4 byte >> > number in >> > - * network order, starting with offset 2 >> > into >> > - * the body of the reply. >> > - */ >> > - u32 real_length; >> > - memcpy(&real_length, >> > - buffer + 2, >> > - sizeof(real_length)); >> > - expected_count = >> > be32_to_cpu(real_length); - >> > - if ((expected_count < offset) || >> > - (expected_count > *len)) { >> > - printf("%s:%d bad response size >> > %d\n", >> > - __FILE__, __LINE__, >> > - expected_count); >> > - return TPM_DRIVER_ERR; >> > - } >> > - } >> > - } >> > - >> > - /* Wait for the next portion. */ >> > - value = tis_wait_reg(&lpc_tpm_dev[locality].tpm_status, >> > - TIS_STS_VALID, TIS_STS_VALID); >> > - if (value == TPM_TIMEOUT_ERR) { >> > - printf("%s:%d failed to read response\n", >> > - __FILE__, __LINE__); >> > - return TPM_DRIVER_ERR; >> > - } >> > - >> > - if (offset == expected_count) >> > - break; /* We got all we needed. */ >> > - >> > - } while ((value & has_data) == has_data); >> > - >> > - /* >> > - * Make sure we indeed read all there was. The TIS_STS_VALID bit >> > is - * known to be set. >> > - */ >> > - if (value & TIS_STS_DATA_AVAILABLE) { >> > - printf("%s:%d wrong receive status %x\n", >> > - __FILE__, __LINE__, value); >> > - return TPM_DRIVER_ERR; >> > - } >> > - >> > - /* Tell the TPM that we are done. */ >> > - tpm_write_word(TIS_STS_COMMAND_READY, &lpc_tpm_dev >> > - [locality].tpm_status); >> > - *len = offset; >> > - return 0; >> > -} >> > - >> > -int tis_open(void) >> > -{ >> > - u8 locality = 0; /* we use locality zero for everything. */ >> > - >> > - if (tis_close()) >> > - return TPM_DRIVER_ERR; >> > - >> > - /* now request access to locality. */ >> > - tpm_write_word(TIS_ACCESS_REQUEST_USE, >> > &lpc_tpm_dev[locality].access); >> > - >> > - /* did we get a lock? */ >> > - if (tis_wait_reg(&lpc_tpm_dev[locality].access, >> > - TIS_ACCESS_ACTIVE_LOCALITY, >> > - TIS_ACCESS_ACTIVE_LOCALITY) == TPM_TIMEOUT_ERR) >> > { - printf("%s:%d - failed to lock locality %d\n", >> > - __FILE__, __LINE__, locality); >> > - return TPM_DRIVER_ERR; >> > - } >> > - >> > - tpm_write_word(TIS_STS_COMMAND_READY, >> > - &lpc_tpm_dev[locality].tpm_status); >> > - return 0; >> > -} >> > - >> > -int tis_close(void) >> > -{ >> > - u8 locality = 0; >> > - >> > - if (tpm_read_word(&lpc_tpm_dev[locality].access) & >> > - TIS_ACCESS_ACTIVE_LOCALITY) { >> > - tpm_write_word(TIS_ACCESS_ACTIVE_LOCALITY, >> > - &lpc_tpm_dev[locality].access); >> > - >> > - if (tis_wait_reg(&lpc_tpm_dev[locality].access, >> > - TIS_ACCESS_ACTIVE_LOCALITY, 0) == >> > - TPM_TIMEOUT_ERR) { >> > - printf("%s:%d - failed to release locality %d\n", >> > - __FILE__, __LINE__, locality); >> > - return TPM_DRIVER_ERR; >> > - } >> > - } >> > - return 0; >> > -} >> > - >> > -int tis_sendrecv(const u8 *sendbuf, size_t send_size, >> > - u8 *recvbuf, size_t *recv_len) >> > -{ >> > - if (tis_senddata(sendbuf, send_size)) { >> > - printf("%s:%d failed sending data to TPM\n", >> > - __FILE__, __LINE__); >> > - return TPM_DRIVER_ERR; >> > - } >> > - >> > - return tis_readresponse(recvbuf, recv_len); >> > -} >> > diff --git a/include/tpm.h b/include/tpm.h >> > deleted file mode 100644 >> > index 6b21e9c..0000000 >> > --- a/include/tpm.h >> > +++ /dev/null >> > @@ -1,71 +0,0 @@ >> > -/* >> > - * Copyright (c) 2011 The Chromium OS Authors. >> > - * >> > - * 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; either version 2 of >> > - * the License, or (at your option) any later version. >> > - * >> > - * 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 _INCLUDE_TPM_H_ >> > -#define _INCLUDE_TPM_H_ >> > - >> > -#include <common.h> >> > - >> > -/* >> > - * tis_init() >> > - * >> > - * Initialize the TPM device. Returns 0 on success or -1 on >> > - * failure (in case device probing did not succeed). >> > - */ >> > -int tis_init(void); >> > - >> > -/* >> > - * tis_open() >> > - * >> > - * Requests access to locality 0 for the caller. After all commands have >> > been >> > - * completed the caller is supposed to call tis_close(). >> > - * >> > - * Returns 0 on success, -1 on failure. >> > - */ >> > -int tis_open(void); >> > - >> > -/* >> > - * tis_close() >> > - * >> > - * terminate the currect session with the TPM by releasing the locked >> > - * locality. Returns 0 on success of -1 on failure (in case lock >> > - * removal did not succeed). >> > - */ >> > -int tis_close(void); >> > - >> > -/* >> > - * tis_sendrecv() >> > - * >> > - * Send the requested data to the TPM and then try to get its response >> > - * >> > - * @sendbuf - buffer of the data to send >> > - * @send_size size of the data to send >> > - * @recvbuf - memory to save the response to >> > - * @recv_len - pointer to the size of the response buffer >> > - * >> > - * Returns 0 on success (and places the number of response bytes at >> > recv_len) >> > - * or -1 on failure. >> > - */ >> > -int tis_sendrecv(const uint8_t *sendbuf, size_t send_size, uint8_t >> > *recvbuf, >> > - size_t *recv_len); >> > - >> > -#endif /* _INCLUDE_TPM_H_ */ >> > -- >> > 1.7.10.4 >> > >> > _______________________________________________ >> > U-Boot mailing list >> > U-Boot@lists.denx.de >> > http://lists.denx.de/mailman/listinfo/u-boot _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot