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Merge branch 'tpm' of git://git.denx.de/u-boot-x86

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This commit is contained in:
Tom Rini 2013-04-15 07:45:07 -04:00
commit 277f037074
16 changed files with 2875 additions and 178 deletions
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2
Makefile
View file

@ -314,7 +314,7 @@ endif
LIBS-y += drivers/rtc/librtc.o
LIBS-y += drivers/serial/libserial.o
LIBS-y += drivers/sound/libsound.o
LIBS-$(CONFIG_GENERIC_LPC_TPM) += drivers/tpm/libtpm.o
LIBS-y += 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

761
common/cmd_tpm.c
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2011 The Chromium OS Authors.
* Copyright (c) 2013 The Chromium OS Authors.
*
* See file CREDITS for list of people who contributed to this
* project.
@ -22,163 +22,652 @@
#include <common.h>
#include <command.h>
#include <malloc.h>
#include <tpm.h>
#include <asm/unaligned.h>
#include <linux/string.h>
#define MAX_TRANSACTION_SIZE 30
/*
* tpm_write() expects a variable number of parameters: the internal address
* followed by data to write, byte by byte.
/**
* Print a byte string in hexdecimal format, 16-bytes per line.
*
* Returns 0 on success or -1 on errors (wrong arguments or TPM failure).
* @param data byte string to be printed
* @param count number of bytes to be printed
*/
static int tpm_process(int argc, char * const argv[], cmd_tbl_t *cmdtp)
static void print_byte_string(uint8_t *data, size_t count)
{
u8 tpm_buffer[MAX_TRANSACTION_SIZE];
u32 write_size, read_size;
char *p;
int rv = -1;
int i, print_newline = 0;
for (write_size = 0; write_size < argc; write_size++) {
u32 datum = simple_strtoul(argv[write_size], &p, 0);
if (*p || (datum > 0xff)) {
printf("\n%s: bad data value\n\n", argv[write_size]);
cmd_usage(cmdtp);
return rv;
}
tpm_buffer[write_size] = (u8)datum;
for (i = 0; i < count; i++) {
printf(" %02x", data[i]);
print_newline = (i % 16 == 15);
if (print_newline)
putc('\n');
}
read_size = sizeof(tpm_buffer);
if (!tis_sendrecv(tpm_buffer, write_size, tpm_buffer, &read_size)) {
int i;
puts("Got TPM response:\n");
for (i = 0; i < read_size; i++)
printf(" %2.2x", tpm_buffer[i]);
puts("\n");
rv = 0;
} else {
puts("tpm command failed\n");
}
return rv;
/* Avoid duplicated newline at the end */
if (!print_newline)
putc('\n');
}
#define CHECK(exp) do { \
int _rv = exp; \
if (_rv) { \
printf("CHECK: %s %d %x\n", #exp, __LINE__, _rv);\
} \
} while (0)
static int tpm_process_stress(int repeat_count)
/**
* Convert a text string of hexdecimal values into a byte string.
*
* @param bytes text string of hexdecimal values with no space
* between them
* @param data output buffer for byte string. The caller has to make
* sure it is large enough for storing the output. If
* NULL is passed, a large enough buffer will be allocated,
* and the caller must free it.
* @param count_ptr output variable for the length of byte string
* @return pointer to output buffer
*/
static void *parse_byte_string(char *bytes, uint8_t *data, size_t *count_ptr)
{
char byte[3];
size_t count, length;
int i;
int rv = 0;
u8 request[] = {0x0, 0xc1,
0x0, 0x0, 0x0, 0x16,
0x0, 0x0, 0x0, 0x65,
0x0, 0x0, 0x0, 0x4,
0x0, 0x0, 0x0, 0x4,
0x0, 0x0, 0x1, 0x9};
u8 response[MAX_TRANSACTION_SIZE];
u32 rlength = MAX_TRANSACTION_SIZE;
CHECK(tis_init());
length = strlen(bytes);
count = length / 2;
for (i = 0; i < repeat_count; i++) {
CHECK(tis_open());
rv = tis_sendrecv(request, sizeof(request), response, &rlength);
if (rv) {
printf("tpm test failed at step %d with 0x%x\n", i, rv);
CHECK(tis_close());
break;
}
CHECK(tis_close());
if ((response[6] || response[7] || response[8] || response[9])
&& response[9] != 0x26) {
/* Ignore postinit errors */
printf("tpm command failed at step %d\n"
"tpm error code: %02x%02x%02x%02x\n", i,
response[6], response[7],
response[8], response[9]);
rv = -1;
break;
}
if (!data)
data = malloc(count);
if (!data)
return NULL;
byte[2] = '\0';
for (i = 0; i < length; i += 2) {
byte[0] = bytes[i];
byte[1] = bytes[i + 1];
data[i / 2] = (uint8_t)simple_strtoul(byte, NULL, 16);
}
return rv;
if (count_ptr)
*count_ptr = count;
return data;
}
static int do_tpm_many(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[], int repeat_count)
/**
* Convert TPM command return code to U-Boot command error codes.
*
* @param return_code TPM command return code
* @return value of enum command_ret_t
*/
static int convert_return_code(uint32_t return_code)
{
int rv = 0;
if (argc < 7 && repeat_count == 0) {
puts("command should be at least six bytes in size\n");
return -1;
}
if (repeat_count > 0) {
rv = tpm_process_stress(repeat_count);
return rv;
}
if (tis_init()) {
puts("tis_init() failed!\n");
return -1;
}
if (tis_open()) {
puts("tis_open() failed!\n");
return -1;
}
rv = tpm_process(argc - 1, argv + 1, cmdtp);
if (tis_close()) {
puts("tis_close() failed!\n");
rv = -1;
}
return rv;
if (return_code)
return CMD_RET_FAILURE;
else
return CMD_RET_SUCCESS;
}
/**
* Return number of values defined by a type string.
*
* @param type_str type string
* @return number of values of type string
*/
static int type_string_get_num_values(const char *type_str)
{
return strlen(type_str);
}
/**
* Return total size of values defined by a type string.
*
* @param type_str type string
* @return total size of values of type string, or 0 if type string
* contains illegal type character.
*/
static size_t type_string_get_space_size(const char *type_str)
{
size_t size;
for (size = 0; *type_str; type_str++) {
switch (*type_str) {
case 'b':
size += 1;
break;
case 'w':
size += 2;
break;
case 'd':
size += 4;
break;
default:
return 0;
}
}
return size;
}
/**
* Allocate a buffer large enough to hold values defined by a type
* string. The caller has to free the buffer.
*
* @param type_str type string
* @param count pointer for storing size of buffer
* @return pointer to buffer or NULL on error
*/
static void *type_string_alloc(const char *type_str, uint32_t *count)
{
void *data;
size_t size;
size = type_string_get_space_size(type_str);
if (!size)
return NULL;
data = malloc(size);
if (data)
*count = size;
return data;
}
/**
* Pack values defined by a type string into a buffer. The buffer must have
* large enough space.
*
* @param type_str type string
* @param values text strings of values to be packed
* @param data output buffer of values
* @return 0 on success, non-0 on error
*/
static int type_string_pack(const char *type_str, char * const values[],
uint8_t *data)
{
size_t offset;
uint32_t value;
for (offset = 0; *type_str; type_str++, values++) {
value = simple_strtoul(values[0], NULL, 0);
switch (*type_str) {
case 'b':
data[offset] = value;
offset += 1;
break;
case 'w':
put_unaligned_be16(value, data + offset);
offset += 2;
break;
case 'd':
put_unaligned_be32(value, data + offset);
offset += 4;
break;
default:
return -1;
}
}
return 0;
}
/**
* Read values defined by a type string from a buffer, and write these values
* to environment variables.
*
* @param type_str type string
* @param data input buffer of values
* @param vars names of environment variables
* @return 0 on success, non-0 on error
*/
static int type_string_write_vars(const char *type_str, uint8_t *data,
char * const vars[])
{
size_t offset;
uint32_t value;
for (offset = 0; *type_str; type_str++, vars++) {
switch (*type_str) {
case 'b':
value = data[offset];
offset += 1;
break;
case 'w':
value = get_unaligned_be16(data + offset);
offset += 2;
break;
case 'd':
value = get_unaligned_be32(data + offset);
offset += 4;
break;
default:
return -1;
}
if (setenv_ulong(*vars, value))
return -1;
}
return 0;
}
static int do_tpm_startup(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
enum tpm_startup_type mode;
if (argc != 2)
return CMD_RET_USAGE;
if (!strcasecmp("TPM_ST_CLEAR", argv[1])) {
mode = TPM_ST_CLEAR;
} else if (!strcasecmp("TPM_ST_STATE", argv[1])) {
mode = TPM_ST_STATE;
} else if (!strcasecmp("TPM_ST_DEACTIVATED", argv[1])) {
mode = TPM_ST_DEACTIVATED;
} else {
printf("Couldn't recognize mode string: %s\n", argv[1]);
return CMD_RET_FAILURE;
}
return convert_return_code(tpm_startup(mode));
}
static int do_tpm_nv_define_space(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
uint32_t index, perm, size;
if (argc != 4)
return CMD_RET_USAGE;
index = simple_strtoul(argv[1], NULL, 0);
perm = simple_strtoul(argv[2], NULL, 0);
size = simple_strtoul(argv[3], NULL, 0);
return convert_return_code(tpm_nv_define_space(index, perm, size));
}
static int do_tpm_nv_read_value(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
uint32_t index, count, rc;
void *data;
if (argc != 4)
return CMD_RET_USAGE;
index = simple_strtoul(argv[1], NULL, 0);
data = (void *)simple_strtoul(argv[2], NULL, 0);
count = simple_strtoul(argv[3], NULL, 0);
rc = tpm_nv_read_value(index, data, count);
if (!rc) {
puts("area content:\n");
print_byte_string(data, count);
}
return convert_return_code(rc);
}
static int do_tpm_nv_write_value(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
uint32_t index, rc;
size_t count;
void *data;
if (argc != 3)
return CMD_RET_USAGE;
index = simple_strtoul(argv[1], NULL, 0);
data = parse_byte_string(argv[2], NULL, &count);
if (!data) {
printf("Couldn't parse byte string %s\n", argv[2]);
return CMD_RET_FAILURE;
}
rc = tpm_nv_write_value(index, data, count);
free(data);
return convert_return_code(rc);
}
static int do_tpm_extend(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
uint32_t index, rc;
uint8_t in_digest[20], out_digest[20];
if (argc != 3)
return CMD_RET_USAGE;
index = simple_strtoul(argv[1], NULL, 0);
if (!parse_byte_string(argv[2], in_digest, NULL)) {
printf("Couldn't parse byte string %s\n", argv[2]);
return CMD_RET_FAILURE;
}
rc = tpm_extend(index, in_digest, out_digest);
if (!rc) {
puts("PCR value after execution of the command:\n");
print_byte_string(out_digest, sizeof(out_digest));
}
return convert_return_code(rc);
}
static int do_tpm_pcr_read(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
uint32_t index, count, rc;
void *data;
if (argc != 4)
return CMD_RET_USAGE;
index = simple_strtoul(argv[1], NULL, 0);
data = (void *)simple_strtoul(argv[2], NULL, 0);
count = simple_strtoul(argv[3], NULL, 0);
rc = tpm_pcr_read(index, data, count);
if (!rc) {
puts("Named PCR content:\n");
print_byte_string(data, count);
}
return convert_return_code(rc);
}
static int do_tpm_tsc_physical_presence(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
uint16_t presence;
if (argc != 2)
return CMD_RET_USAGE;
presence = (uint16_t)simple_strtoul(argv[1], NULL, 0);
return convert_return_code(tpm_tsc_physical_presence(presence));
}
static int do_tpm_read_pubek(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
uint32_t count, rc;
void *data;
if (argc != 3)
return CMD_RET_USAGE;
data = (void *)simple_strtoul(argv[1], NULL, 0);
count = simple_strtoul(argv[2], NULL, 0);
rc = tpm_read_pubek(data, count);
if (!rc) {
puts("pubek value:\n");
print_byte_string(data, count);
}
return convert_return_code(rc);
}
static int do_tpm_physical_set_deactivated(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
uint8_t state;
if (argc != 2)
return CMD_RET_USAGE;
state = (uint8_t)simple_strtoul(argv[1], NULL, 0);
return convert_return_code(tpm_physical_set_deactivated(state));
}
static int do_tpm_get_capability(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
uint32_t cap_area, sub_cap, rc;
void *cap;
size_t count;
if (argc != 5)
return CMD_RET_USAGE;
cap_area = simple_strtoul(argv[1], NULL, 0);
sub_cap = simple_strtoul(argv[2], NULL, 0);
cap = (void *)simple_strtoul(argv[3], NULL, 0);
count = simple_strtoul(argv[4], NULL, 0);
rc = tpm_get_capability(cap_area, sub_cap, cap, count);
if (!rc) {
puts("capability information:\n");
print_byte_string(cap, count);
}
return convert_return_code(rc);
}
#define TPM_COMMAND_NO_ARG(cmd) \
static int do_##cmd(cmd_tbl_t *cmdtp, int flag, \
int argc, char * const argv[]) \
{ \
if (argc != 1) \
return CMD_RET_USAGE; \
return convert_return_code(cmd()); \
}
TPM_COMMAND_NO_ARG(tpm_init)
TPM_COMMAND_NO_ARG(tpm_self_test_full)
TPM_COMMAND_NO_ARG(tpm_continue_self_test)
TPM_COMMAND_NO_ARG(tpm_force_clear)
TPM_COMMAND_NO_ARG(tpm_physical_enable)
TPM_COMMAND_NO_ARG(tpm_physical_disable)
static int do_tpm_raw_transfer(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
void *command;
uint8_t response[1024];
size_t count, response_length = sizeof(response);
uint32_t rc;
command = parse_byte_string(argv[1], NULL, &count);
if (!command) {
printf("Couldn't parse byte string %s\n", argv[1]);
return CMD_RET_FAILURE;
}
rc = tis_sendrecv(command, count, response, &response_length);
free(command);
if (!rc) {
puts("tpm response:\n");
print_byte_string(response, response_length);
}
return convert_return_code(rc);
}
static int do_tpm_nv_define(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
uint32_t index, perm, size;
if (argc != 4)
return CMD_RET_USAGE;
size = type_string_get_space_size(argv[1]);
if (!size) {
printf("Couldn't parse arguments\n");
return CMD_RET_USAGE;
}
index = simple_strtoul(argv[2], NULL, 0);
perm = simple_strtoul(argv[3], NULL, 0);
return convert_return_code(tpm_nv_define_space(index, perm, size));
}
static int do_tpm_nv_read(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
uint32_t index, count, err;
void *data;
if (argc < 3)
return CMD_RET_USAGE;
if (argc != 3 + type_string_get_num_values(argv[1]))
return CMD_RET_USAGE;
index = simple_strtoul(argv[2], NULL, 0);
data = type_string_alloc(argv[1], &count);
if (!data) {
printf("Couldn't parse arguments\n");
return CMD_RET_USAGE;
}
err = tpm_nv_read_value(index, data, count);
if (!err) {
if (type_string_write_vars(argv[1], data, argv + 3)) {
printf("Couldn't write to variables\n");
err = ~0;
}
}
free(data);
return convert_return_code(err);
}
static int do_tpm_nv_write(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
uint32_t index, count, err;
void *data;
if (argc < 3)
return CMD_RET_USAGE;
if (argc != 3 + type_string_get_num_values(argv[1]))
return CMD_RET_USAGE;
index = simple_strtoul(argv[2], NULL, 0);
data = type_string_alloc(argv[1], &count);
if (!data) {
printf("Couldn't parse arguments\n");
return CMD_RET_USAGE;
}
if (type_string_pack(argv[1], argv + 3, data)) {
printf("Couldn't parse arguments\n");
free(data);
return CMD_RET_USAGE;
}
err = tpm_nv_write_value(index, data, count);
free(data);
return convert_return_code(err);
}
#define MAKE_TPM_CMD_ENTRY(cmd) \
U_BOOT_CMD_MKENT(cmd, 0, 1, do_tpm_ ## cmd, "", "")
static cmd_tbl_t tpm_commands[] = {
U_BOOT_CMD_MKENT(init, 0, 1,
do_tpm_init, "", ""),
U_BOOT_CMD_MKENT(startup, 0, 1,
do_tpm_startup, "", ""),
U_BOOT_CMD_MKENT(self_test_full, 0, 1,
do_tpm_self_test_full, "", ""),
U_BOOT_CMD_MKENT(continue_self_test, 0, 1,
do_tpm_continue_self_test, "", ""),
U_BOOT_CMD_MKENT(force_clear, 0, 1,
do_tpm_force_clear, "", ""),
U_BOOT_CMD_MKENT(physical_enable, 0, 1,
do_tpm_physical_enable, "", ""),
U_BOOT_CMD_MKENT(physical_disable, 0, 1,
do_tpm_physical_disable, "", ""),
U_BOOT_CMD_MKENT(nv_define_space, 0, 1,
do_tpm_nv_define_space, "", ""),
U_BOOT_CMD_MKENT(nv_read_value, 0, 1,
do_tpm_nv_read_value, "", ""),
U_BOOT_CMD_MKENT(nv_write_value, 0, 1,
do_tpm_nv_write_value, "", ""),
U_BOOT_CMD_MKENT(extend, 0, 1,
do_tpm_extend, "", ""),
U_BOOT_CMD_MKENT(pcr_read, 0, 1,
do_tpm_pcr_read, "", ""),
U_BOOT_CMD_MKENT(tsc_physical_presence, 0, 1,
do_tpm_tsc_physical_presence, "", ""),
U_BOOT_CMD_MKENT(read_pubek, 0, 1,
do_tpm_read_pubek, "", ""),
U_BOOT_CMD_MKENT(physical_set_deactivated, 0, 1,
do_tpm_physical_set_deactivated, "", ""),
U_BOOT_CMD_MKENT(get_capability, 0, 1,
do_tpm_get_capability, "", ""),
U_BOOT_CMD_MKENT(raw_transfer, 0, 1,
do_tpm_raw_transfer, "", ""),
U_BOOT_CMD_MKENT(nv_define, 0, 1,
do_tpm_nv_define, "", ""),
U_BOOT_CMD_MKENT(nv_read, 0, 1,
do_tpm_nv_read, "", ""),
U_BOOT_CMD_MKENT(nv_write, 0, 1,
do_tpm_nv_write, "", ""),
};
static int do_tpm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
return do_tpm_many(cmdtp, flag, argc, argv, 0);
cmd_tbl_t *tpm_cmd;
if (argc < 2)
return CMD_RET_USAGE;
tpm_cmd = find_cmd_tbl(argv[1], tpm_commands, ARRAY_SIZE(tpm_commands));
if (!tpm_cmd)
return CMD_RET_USAGE;
return tpm_cmd->cmd(cmdtp, flag, argc - 1, argv + 1);
}
U_BOOT_CMD(tpm, MAX_TRANSACTION_SIZE, 1, do_tpm,
"<byte> [<byte> ...] - write data and read response",
"send arbitrary data (at least 6 bytes) to the TPM "
"device and read the response"
);
static int do_tpm_stress(cmd_tbl_t *cmdtp, int flag,
int argc, char * const argv[])
{
long unsigned int n;
int rv;
if (argc != 2) {
puts("usage: tpm_stress <count>\n");
return -1;
}
rv = strict_strtoul(argv[1], 10, &n);
if (rv) {
puts("tpm_stress: bad count");
return -1;
}
return do_tpm_many(cmdtp, flag, argc, argv, n);
}
U_BOOT_CMD(tpm_stress, 2, 1, do_tpm_stress,
"<n> - stress-test communication with TPM",
"Repeat a TPM transaction (request-response) N times"
U_BOOT_CMD(tpm, CONFIG_SYS_MAXARGS, 1, do_tpm,
"Issue a TPM command",
"cmd args...\n"
" - Issue TPM command <cmd> with arguments <args...>.\n"
"Admin Startup and State Commands:\n"
" init\n"
" - Put TPM into a state where it waits for 'startup' command.\n"
" startup mode\n"
" - Issue TPM_Starup command. <mode> is one of TPM_ST_CLEAR,\n"
" TPM_ST_STATE, and TPM_ST_DEACTIVATED.\n"
"Admin Testing Commands:\n"
" self_test_full\n"
" - Test all of the TPM capabilities.\n"
" continue_self_test\n"
" - Inform TPM that it should complete the self-test.\n"
"Admin Opt-in Commands:\n"
" physical_enable\n"
" - Set the PERMANENT disable flag to FALSE using physical presence as\n"
" authorization.\n"
" physical_disable\n"
" - Set the PERMANENT disable flag to TRUE using physical presence as\n"
" authorization.\n"
" physical_set_deactivated 0|1\n"
" - Set deactivated flag.\n"
"Admin Ownership Commands:\n"
" force_clear\n"
" - Issue TPM_ForceClear command.\n"
" tsc_physical_presence flags\n"
" - Set TPM device's Physical Presence flags to <flags>.\n"
"The Capability Commands:\n"
" get_capability cap_area sub_cap addr count\n"
" - Read <count> bytes of TPM capability indexed by <cap_area> and\n"
" <sub_cap> to memory address <addr>.\n"
"Endorsement Key Handling Commands:\n"
" read_pubek addr count\n"
" - Read <count> bytes of the public endorsement key to memory\n"
" address <addr>\n"
"Integrity Collection and Reporting Commands:\n"
" extend index digest_hex_string\n"
" - Add a new measurement to a PCR. Update PCR <index> with the 20-bytes\n"
" <digest_hex_string>\n"
" pcr_read index addr count\n"
" - Read <count> bytes from PCR <index> to memory address <addr>.\n"
"Non-volatile Storage Commands:\n"
" nv_define_space index permission size\n"
" - Establish a space at index <index> with <permission> of <size> bytes.\n"
" nv_read_value index addr count\n"
" - Read <count> bytes from space <index> to memory address <addr>.\n"
" nv_write_value index addr count\n"
" - Write <count> bytes from memory address <addr> to space <index>.\n"
"Miscellaneous helper functions:\n"
" raw_transfer byte_string\n"
" - Send a byte string <byte_string> to TPM and print the response.\n"
" Non-volatile storage helper functions:\n"
" These helper functions treat a non-volatile space as a non-padded\n"
" sequence of integer values. These integer values are defined by a type\n"
" string, which is a text string of 'bwd' characters: 'b' means a 8-bit\n"
" value, 'w' 16-bit value, 'd' 32-bit value. All helper functions take\n"
" a type string as their first argument.\n"
" nv_define type_string index perm\n"
" - Define a space <index> with permission <perm>.\n"
" nv_read types_string index vars...\n"
" - Read from space <index> to environment variables <vars...>.\n"
" nv_write types_string index values...\n"
" - Write to space <index> from values <values...>.\n"
);

4
drivers/tpm/Makefile
View file

@ -23,7 +23,11 @@ include $(TOPDIR)/config.mk
LIB := $(obj)libtpm.o
$(shell mkdir -p $(obj)slb9635_i2c)
COBJS-$(CONFIG_GENERIC_LPC_TPM) = generic_lpc_tpm.o
COBJS-$(CONFIG_INFINEON_TPM_I2C) += tis_i2c.o slb9635_i2c/tpm.o
COBJS-$(CONFIG_INFINEON_TPM_I2C) += slb9635_i2c/tpm_tis_i2c.o
COBJS := $(COBJS-y)
SRCS := $(COBJS:.o=.c)

10
drivers/tpm/generic_lpc_tpm.c
View file

@ -135,7 +135,7 @@ 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);
(u32)(uintptr_t)ptr - (u32)(uintptr_t)lpc_tpm_dev, ret);
return ret;
}
@ -143,21 +143,21 @@ 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);
(u32)(uintptr_t)ptr - (u32)(uintptr_t)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);
(u32)(uintptr_t)ptr - (u32)(uintptr_t)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);
(u32)(uintptr_t)ptr - (u32)(uintptr_t)lpc_tpm_dev, value);
writel(value, ptr);
}
@ -491,5 +491,5 @@ int tis_sendrecv(const u8 *sendbuf, size_t send_size,
return TPM_DRIVER_ERR;
}
return tis_readresponse(recvbuf, recv_len);
return tis_readresponse(recvbuf, (u32 *)recv_len);
}

51
drivers/tpm/slb9635_i2c/compatibility.h Normal file
View file

@ -0,0 +1,51 @@
/*
* Copyright (C) 2011 Infineon Technologies
*
* Authors:
* Peter Huewe <huewe.external@infineon.com>
*
* 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; 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 _COMPATIBILITY_H_
#define _COMPATIBILITY_H_
/* all includes from U-Boot */
#include <linux/types.h>
#include <linux/unaligned/be_byteshift.h>
#include <asm-generic/errno.h>
#include <compiler.h>
#include <common.h>
/* extended error numbers from linux (see errno.h) */
#define ECANCELED 125 /* Operation Canceled */
#define msleep(t) udelay((t)*1000)
/* Timer frequency. Corresponds to msec timer resolution*/
#define HZ 1000
#define dev_dbg(dev, format, arg...) debug(format, ##arg)
#define dev_err(dev, format, arg...) printf(format, ##arg)
#define dev_info(dev, format, arg...) debug(format, ##arg)
#define dbg_printf debug
#endif

453
drivers/tpm/slb9635_i2c/tpm.c Normal file
View file

@ -0,0 +1,453 @@
/*
* 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 <malloc.h>
#include "tpm.h"
/* global structure for tpm chip data */
struct tpm_chip g_chip;
enum tpm_duration {
TPM_SHORT = 0,
TPM_MEDIUM = 1,
TPM_LONG = 2,
TPM_UNDEFINED,
};
#define TPM_MAX_ORDINAL 243
#define TPM_MAX_PROTECTED_ORDINAL 12
#define TPM_PROTECTED_ORDINAL_MASK 0xFF
/*
* 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
*/
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
View 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
View 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
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@ -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;
}

7
include/configs/exynos5250-dt.h
View file

@ -129,6 +129,13 @@
#define CONFIG_USB_EHCI_EXYNOS
#define CONFIG_USB_STORAGE
/* TPM */
#define CONFIG_TPM
#define CONFIG_CMD_TPM
#define CONFIG_INFINEON_TPM_I2C
#define CONFIG_INFINEON_TPM_I2C_BUS 3
#define CONFIG_INFINEON_TPM_I2C_ADDR 0x20
/* MMC SPL */
#define CONFIG_SPL
#define COPY_BL2_FNPTR_ADDR 0x02020030

1
include/fdtdec.h
View file

@ -90,6 +90,7 @@ enum fdt_compat_id {
COMPAT_MAXIM_MAX77686_PMIC, /* MAX77686 PMIC */
COMPAT_GENERIC_SPI_FLASH, /* Generic SPI Flash chip */
COMPAT_MAXIM_98095_CODEC, /* MAX98095 Codec */
COMPAT_INFINEON_SLB9635_TPM, /* Infineon SLB9635 TPM */
COMPAT_COUNT,
};

73
include/tis.h Normal file
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@ -0,0 +1,73 @@
/*
* 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 __TIS_H
#define __TIS_H
#include <common.h>
/* Low-level interface to access TPM */
/*
* 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 /* __TIS_H */

205
include/tpm.h
View file

@ -1,5 +1,5 @@
/*
* Copyright (c) 2011 The Chromium OS Authors.
* Copyright (c) 2013 The Chromium OS Authors.
*
* See file CREDITS for list of people who contributed to this
* project.
@ -20,52 +20,185 @@
* MA 02111-1307 USA
*/
#ifndef _INCLUDE_TPM_H_
#define _INCLUDE_TPM_H_
#ifndef __TPM_H
#define __TPM_H
#include <common.h>
#include <tis.h>
/*
* tis_init()
*
* Initialize the TPM device. Returns 0 on success or -1 on
* failure (in case device probing did not succeed).
* Here is a partial implementation of TPM commands. Please consult TCG Main
* Specification for definitions of TPM commands.
*/
int tis_init(void);
/*
* tis_open()
enum tpm_startup_type {
TPM_ST_CLEAR = 0x0001,
TPM_ST_STATE = 0x0002,
TPM_ST_DEACTIVATED = 0x0003,
};
enum tpm_physical_presence {
TPM_PHYSICAL_PRESENCE_HW_DISABLE = 0x0200,
TPM_PHYSICAL_PRESENCE_CMD_DISABLE = 0x0100,
TPM_PHYSICAL_PRESENCE_LIFETIME_LOCK = 0x0080,
TPM_PHYSICAL_PRESENCE_HW_ENABLE = 0x0040,
TPM_PHYSICAL_PRESENCE_CMD_ENABLE = 0x0020,
TPM_PHYSICAL_PRESENCE_NOTPRESENT = 0x0010,
TPM_PHYSICAL_PRESENCE_PRESENT = 0x0008,
TPM_PHYSICAL_PRESENCE_LOCK = 0x0004,
};
enum tpm_nv_index {
TPM_NV_INDEX_LOCK = 0xffffffff,
TPM_NV_INDEX_0 = 0x00000000,
TPM_NV_INDEX_DIR = 0x10000001,
};
/**
* Initialize TPM device. It must be called before any TPM commands.
*
* 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.
* @return 0 on success, non-0 on error.
*/
int tis_open(void);
uint32_t tpm_init(void);
/*
* tis_close()
/**
* Issue a TPM_Startup command.
*
* 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).
* @param mode TPM startup mode
* @return return code of the operation
*/
int tis_close(void);
uint32_t tpm_startup(enum tpm_startup_type mode);
/*
* tis_sendrecv()
/**
* Issue a TPM_SelfTestFull command.
*
* 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.
* @return return code of the operation
*/
int tis_sendrecv(const uint8_t *sendbuf, size_t send_size, uint8_t *recvbuf,
size_t *recv_len);
uint32_t tpm_self_test_full(void);
#endif /* _INCLUDE_TPM_H_ */
/**
* Issue a TPM_ContinueSelfTest command.
*
* @return return code of the operation
*/
uint32_t tpm_continue_self_test(void);
/**
* Issue a TPM_NV_DefineSpace command. The implementation is limited
* to specify TPM_NV_ATTRIBUTES and size of the area. The area index
* could be one of the special value listed in enum tpm_nv_index.
*
* @param index index of the area
* @param perm TPM_NV_ATTRIBUTES of the area
* @param size size of the area
* @return return code of the operation
*/
uint32_t tpm_nv_define_space(uint32_t index, uint32_t perm, uint32_t size);
/**
* Issue a TPM_NV_ReadValue command. This implementation is limited
* to read the area from offset 0. The area index could be one of
* the special value listed in enum tpm_nv_index.
*
* @param index index of the area
* @param data output buffer of the area contents
* @param count size of output buffer
* @return return code of the operation
*/
uint32_t tpm_nv_read_value(uint32_t index, void *data, uint32_t count);
/**
* Issue a TPM_NV_WriteValue command. This implementation is limited
* to write the area from offset 0. The area index could be one of
* the special value listed in enum tpm_nv_index.
*
* @param index index of the area
* @param data input buffer to be wrote to the area
* @param length length of data bytes of input buffer
* @return return code of the operation
*/
uint32_t tpm_nv_write_value(uint32_t index, const void *data, uint32_t length);
/**
* Issue a TPM_Extend command.
*
* @param index index of the PCR
* @param in_digest 160-bit value representing the event to be
* recorded
* @param out_digest 160-bit PCR value after execution of the
* command
* @return return code of the operation
*/
uint32_t tpm_extend(uint32_t index, const void *in_digest, void *out_digest);
/**
* Issue a TPM_PCRRead command.
*
* @param index index of the PCR
* @param data output buffer for contents of the named PCR
* @param count size of output buffer
* @return return code of the operation
*/
uint32_t tpm_pcr_read(uint32_t index, void *data, size_t count);
/**
* Issue a TSC_PhysicalPresence command. TPM physical presence flag
* is bit-wise OR'ed of flags listed in enum tpm_physical_presence.
*
* @param presence TPM physical presence flag
* @return return code of the operation
*/
uint32_t tpm_tsc_physical_presence(uint16_t presence);
/**
* Issue a TPM_ReadPubek command.
*
* @param data output buffer for the public endorsement key
* @param count size of ouput buffer
* @return return code of the operation
*/
uint32_t tpm_read_pubek(void *data, size_t count);
/**
* Issue a TPM_ForceClear command.
*
* @return return code of the operation
*/
uint32_t tpm_force_clear(void);
/**
* Issue a TPM_PhysicalEnable command.
*
* @return return code of the operation
*/
uint32_t tpm_physical_enable(void);
/**
* Issue a TPM_PhysicalDisable command.
*
* @return return code of the operation
*/
uint32_t tpm_physical_disable(void);
/**
* Issue a TPM_PhysicalSetDeactivated command.
*
* @param state boolean state of the deactivated flag
* @return return code of the operation
*/
uint32_t tpm_physical_set_deactivated(uint8_t state);
/**
* Issue a TPM_GetCapability command. This implementation is limited
* to query sub_cap index that is 4-byte wide.
*
* @param cap_area partition of capabilities
* @param sub_cap further definition of capability, which is
* limited to be 4-byte wide
* @param cap output buffer for capability information
* @param count size of ouput buffer
* @return return code of the operation
*/
uint32_t tpm_get_capability(uint32_t cap_area, uint32_t sub_cap,
void *cap, size_t count);
#endif /* __TPM_H */

1
lib/Makefile
View file

@ -54,6 +54,7 @@ COBJS-y += qsort.o
COBJS-$(CONFIG_SHA1) += sha1.o
COBJS-$(CONFIG_SHA256) += sha256.o
COBJS-y += strmhz.o
COBJS-$(CONFIG_TPM) += tpm.o
COBJS-$(CONFIG_RBTREE) += rbtree.o
endif

1
lib/fdtdec.c
View file

@ -63,6 +63,7 @@ static const char * const compat_names[COMPAT_COUNT] = {
COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686_pmic"),
COMPAT(GENERIC_SPI_FLASH, "spi-flash"),
COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),
COMPAT(INFINEON_SLB9635_TPM, "infineon,slb9635-tpm"),
};
const char *fdtdec_get_compatible(enum fdt_compat_id id)

581
lib/tpm.c Normal file
View file

@ -0,0 +1,581 @@
/*
* Copyright (c) 2013 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
*/
#include <common.h>
#include <stdarg.h>
#include <tpm.h>
#include <asm/unaligned.h>
/* Internal error of TPM command library */
#define TPM_LIB_ERROR ((uint32_t)~0u)
/* Useful constants */
enum {
COMMAND_BUFFER_SIZE = 256,
TPM_PUBEK_SIZE = 256,
TPM_REQUEST_HEADER_LENGTH = 10,
TPM_RESPONSE_HEADER_LENGTH = 10,
PCR_DIGEST_LENGTH = 20,
};
/**
* Pack data into a byte string. The data types are specified in
* the format string: 'b' means unsigned byte, 'w' unsigned word,
* 'd' unsigned double word, and 's' byte string. The data are a
* series of offsets and values (for type byte string there are also
* lengths). The data values are packed into the byte string
* sequentially, and so a latter value could over-write a former
* value.
*
* @param str output string
* @param size size of output string
* @param format format string
* @param ... data points
* @return 0 on success, non-0 on error
*/
int pack_byte_string(uint8_t *str, size_t size, const char *format, ...)
{
va_list args;
size_t offset = 0, length = 0;
uint8_t *data = NULL;
uint32_t value = 0;
va_start(args, format);
for (; *format; format++) {
switch (*format) {
case 'b':
offset = va_arg(args, size_t);
value = va_arg(args, int);
length = 1;
break;
case 'w':
offset = va_arg(args, size_t);
value = va_arg(args, int);
length = 2;
break;
case 'd':
offset = va_arg(args, size_t);
value = va_arg(args, uint32_t);
length = 4;
break;
case 's':
offset = va_arg(args, size_t);
data = va_arg(args, uint8_t *);
length = va_arg(args, uint32_t);
break;
default:
debug("Couldn't recognize format string\n");
return -1;
}
if (offset + length > size)
return -1;
switch (*format) {
case 'b':
str[offset] = value;
break;
case 'w':
put_unaligned_be16(value, str + offset);
break;
case 'd':
put_unaligned_be32(value, str + offset);
break;
case 's':
memcpy(str + offset, data, length);
break;
}
}
va_end(args);
return 0;
}
/**
* Unpack data from a byte string. The data types are specified in
* the format string: 'b' means unsigned byte, 'w' unsigned word,
* 'd' unsigned double word, and 's' byte string. The data are a
* series of offsets and pointers (for type byte string there are also
* lengths).
*
* @param str output string
* @param size size of output string
* @param format format string
* @param ... data points
* @return 0 on success, non-0 on error
*/
int unpack_byte_string(const uint8_t *str, size_t size, const char *format, ...)
{
va_list args;
size_t offset = 0, length = 0;
uint8_t *ptr8 = NULL;
uint16_t *ptr16 = NULL;
uint32_t *ptr32 = NULL;
va_start(args, format);
for (; *format; format++) {
switch (*format) {
case 'b':
offset = va_arg(args, size_t);
ptr8 = va_arg(args, uint8_t *);
length = 1;
break;
case 'w':
offset = va_arg(args, size_t);
ptr16 = va_arg(args, uint16_t *);
length = 2;
break;
case 'd':
offset = va_arg(args, size_t);
ptr32 = va_arg(args, uint32_t *);
length = 4;
break;
case 's':
offset = va_arg(args, size_t);
ptr8 = va_arg(args, uint8_t *);
length = va_arg(args, uint32_t);
break;
default:
debug("Couldn't recognize format string\n");
return -1;
}
if (offset + length > size)
return -1;
switch (*format) {
case 'b':
*ptr8 = str[offset];
break;
case 'w':
*ptr16 = get_unaligned_be16(str + offset);
break;
case 'd':
*ptr32 = get_unaligned_be32(str + offset);
break;
case 's':
memcpy(ptr8, str + offset, length);
break;
}
}
va_end(args);
return 0;
}
/**
* Get TPM command size.
*
* @param command byte string of TPM command
* @return command size of the TPM command
*/
static uint32_t tpm_command_size(const void *command)
{
const size_t command_size_offset = 2;
return get_unaligned_be32(command + command_size_offset);
}
/**
* Get TPM response return code, which is one of TPM_RESULT values.
*
* @param response byte string of TPM response
* @return return code of the TPM response
*/
static uint32_t tpm_return_code(const void *response)
{
const size_t return_code_offset = 6;
return get_unaligned_be32(response + return_code_offset);
}
/**
* Send a TPM command and return response's return code, and optionally
* return response to caller.
*
* @param command byte string of TPM command
* @param response output buffer for TPM response, or NULL if the
* caller does not care about it
* @param size_ptr output buffer size (input parameter) and TPM
* response length (output parameter); this parameter
* is a bidirectional
* @return return code of the TPM response
*/
static uint32_t tpm_sendrecv_command(const void *command,
void *response, size_t *size_ptr)
{
uint8_t response_buffer[COMMAND_BUFFER_SIZE];
size_t response_length;
uint32_t err;
if (response) {
response_length = *size_ptr;
} else {
response = response_buffer;
response_length = sizeof(response_buffer);
}
err = tis_sendrecv(command, tpm_command_size(command),
response, &response_length);
if (err)
return TPM_LIB_ERROR;
if (response)
*size_ptr = response_length;
return tpm_return_code(response);
}
uint32_t tpm_init(void)
{
uint32_t err;
err = tis_init();
if (err)
return err;
return tis_open();
}
uint32_t tpm_startup(enum tpm_startup_type mode)
{
const uint8_t command[12] = {
0x0, 0xc1, 0x0, 0x0, 0x0, 0xc, 0x0, 0x0, 0x0, 0x99, 0x0, 0x0,
};
const size_t mode_offset = 10;
uint8_t buf[COMMAND_BUFFER_SIZE];
if (pack_byte_string(buf, sizeof(buf), "sw",
0, command, sizeof(command),
mode_offset, mode))
return TPM_LIB_ERROR;
return tpm_sendrecv_command(buf, NULL, NULL);
}
uint32_t tpm_self_test_full(void)
{
const uint8_t command[10] = {
0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x50,
};
return tpm_sendrecv_command(command, NULL, NULL);
}
uint32_t tpm_continue_self_test(void)
{
const uint8_t command[10] = {
0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x53,
};
return tpm_sendrecv_command(command, NULL, NULL);
}
uint32_t tpm_nv_define_space(uint32_t index, uint32_t perm, uint32_t size)
{
const uint8_t command[101] = {
0x0, 0xc1, /* TPM_TAG */
0x0, 0x0, 0x0, 0x65, /* parameter size */
0x0, 0x0, 0x0, 0xcc, /* TPM_COMMAND_CODE */
/* TPM_NV_DATA_PUBLIC->... */
0x0, 0x18, /* ...->TPM_STRUCTURE_TAG */
0, 0, 0, 0, /* ...->TPM_NV_INDEX */
/* TPM_NV_DATA_PUBLIC->TPM_PCR_INFO_SHORT */
0x0, 0x3,
0, 0, 0,
0x1f,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* TPM_NV_DATA_PUBLIC->TPM_PCR_INFO_SHORT */
0x0, 0x3,
0, 0, 0,
0x1f,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* TPM_NV_ATTRIBUTES->... */
0x0, 0x17, /* ...->TPM_STRUCTURE_TAG */
0, 0, 0, 0, /* ...->attributes */
/* End of TPM_NV_ATTRIBUTES */
0, /* bReadSTClear */
0, /* bWriteSTClear */
0, /* bWriteDefine */
0, 0, 0, 0, /* size */
};
const size_t index_offset = 12;
const size_t perm_offset = 70;
const size_t size_offset = 77;
uint8_t buf[COMMAND_BUFFER_SIZE];
if (pack_byte_string(buf, sizeof(buf), "sddd",
0, command, sizeof(command),
index_offset, index,
perm_offset, perm,
size_offset, size))
return TPM_LIB_ERROR;
return tpm_sendrecv_command(buf, NULL, NULL);
}
uint32_t tpm_nv_read_value(uint32_t index, void *data, uint32_t count)
{
const uint8_t command[22] = {
0x0, 0xc1, 0x0, 0x0, 0x0, 0x16, 0x0, 0x0, 0x0, 0xcf,
};
const size_t index_offset = 10;
const size_t length_offset = 18;
const size_t data_size_offset = 10;
const size_t data_offset = 14;
uint8_t buf[COMMAND_BUFFER_SIZE], response[COMMAND_BUFFER_SIZE];
size_t response_length = sizeof(response);
uint32_t data_size;
uint32_t err;
if (pack_byte_string(buf, sizeof(buf), "sdd",
0, command, sizeof(command),
index_offset, index,
length_offset, count))
return TPM_LIB_ERROR;
err = tpm_sendrecv_command(buf, response, &response_length);
if (err)
return err;
if (unpack_byte_string(response, response_length, "d",
data_size_offset, &data_size))
return TPM_LIB_ERROR;
if (data_size > count)
return TPM_LIB_ERROR;
if (unpack_byte_string(response, response_length, "s",
data_offset, data, data_size))
return TPM_LIB_ERROR;
return 0;
}
uint32_t tpm_nv_write_value(uint32_t index, const void *data, uint32_t length)
{
const uint8_t command[256] = {
0x0, 0xc1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xcd,
};
const size_t command_size_offset = 2;
const size_t index_offset = 10;
const size_t length_offset = 18;
const size_t data_offset = 22;
const size_t write_info_size = 12;
const uint32_t total_length =
TPM_REQUEST_HEADER_LENGTH + write_info_size + length;
uint8_t buf[COMMAND_BUFFER_SIZE], response[COMMAND_BUFFER_SIZE];
size_t response_length = sizeof(response);
uint32_t err;
if (pack_byte_string(buf, sizeof(buf), "sddds",
0, command, sizeof(command),
command_size_offset, total_length,
index_offset, index,
length_offset, length,
data_offset, data, length))
return TPM_LIB_ERROR;
err = tpm_sendrecv_command(buf, response, &response_length);
if (err)
return err;
return 0;
}
uint32_t tpm_extend(uint32_t index, const void *in_digest, void *out_digest)
{
const uint8_t command[34] = {
0x0, 0xc1, 0x0, 0x0, 0x0, 0x22, 0x0, 0x0, 0x0, 0x14,
};
const size_t index_offset = 10;
const size_t in_digest_offset = 14;
const size_t out_digest_offset = 10;
uint8_t buf[COMMAND_BUFFER_SIZE];
uint8_t response[TPM_RESPONSE_HEADER_LENGTH + PCR_DIGEST_LENGTH];
size_t response_length = sizeof(response);
uint32_t err;
if (pack_byte_string(buf, sizeof(buf), "sds",
0, command, sizeof(command),
index_offset, index,
in_digest_offset, in_digest,
PCR_DIGEST_LENGTH))
return TPM_LIB_ERROR;
err = tpm_sendrecv_command(buf, response, &response_length);
if (err)
return err;
if (unpack_byte_string(response, response_length, "s",
out_digest_offset, out_digest,
PCR_DIGEST_LENGTH))
return TPM_LIB_ERROR;
return 0;
}
uint32_t tpm_pcr_read(uint32_t index, void *data, size_t count)
{
const uint8_t command[14] = {
0x0, 0xc1, 0x0, 0x0, 0x0, 0xe, 0x0, 0x0, 0x0, 0x15,
};
const size_t index_offset = 10;
const size_t out_digest_offset = 10;
uint8_t buf[COMMAND_BUFFER_SIZE], response[COMMAND_BUFFER_SIZE];
size_t response_length = sizeof(response);
uint32_t err;
if (count < PCR_DIGEST_LENGTH)
return TPM_LIB_ERROR;
if (pack_byte_string(buf, sizeof(buf), "sd",
0, command, sizeof(command),
index_offset, index))
return TPM_LIB_ERROR;
err = tpm_sendrecv_command(buf, response, &response_length);
if (err)
return err;
if (unpack_byte_string(response, response_length, "s",
out_digest_offset, data, PCR_DIGEST_LENGTH))
return TPM_LIB_ERROR;
return 0;
}
uint32_t tpm_tsc_physical_presence(uint16_t presence)
{
const uint8_t command[12] = {
0x0, 0xc1, 0x0, 0x0, 0x0, 0xc, 0x40, 0x0, 0x0, 0xa, 0x0, 0x0,
};
const size_t presence_offset = 10;
uint8_t buf[COMMAND_BUFFER_SIZE];
if (pack_byte_string(buf, sizeof(buf), "sw",
0, command, sizeof(command),
presence_offset, presence))
return TPM_LIB_ERROR;
return tpm_sendrecv_command(buf, NULL, NULL);
}
uint32_t tpm_read_pubek(void *data, size_t count)
{
const uint8_t command[30] = {
0x0, 0xc1, 0x0, 0x0, 0x0, 0x1e, 0x0, 0x0, 0x0, 0x7c,
};
const size_t response_size_offset = 2;
const size_t data_offset = 10;
const size_t header_and_checksum_size = TPM_RESPONSE_HEADER_LENGTH + 20;
uint8_t response[COMMAND_BUFFER_SIZE + TPM_PUBEK_SIZE];
size_t response_length = sizeof(response);
uint32_t data_size;
uint32_t err;
err = tpm_sendrecv_command(command, response, &response_length);
if (err)
return err;
if (unpack_byte_string(response, response_length, "d",
response_size_offset, &data_size))
return TPM_LIB_ERROR;
if (data_size < header_and_checksum_size)
return TPM_LIB_ERROR;
data_size -= header_and_checksum_size;
if (data_size > count)
return TPM_LIB_ERROR;
if (unpack_byte_string(response, response_length, "s",
data_offset, data, data_size))
return TPM_LIB_ERROR;
return 0;
}
uint32_t tpm_force_clear(void)
{
const uint8_t command[10] = {
0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x5d,
};
return tpm_sendrecv_command(command, NULL, NULL);
}
uint32_t tpm_physical_enable(void)
{
const uint8_t command[10] = {
0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x6f,
};
return tpm_sendrecv_command(command, NULL, NULL);
}
uint32_t tpm_physical_disable(void)
{
const uint8_t command[10] = {
0x0, 0xc1, 0x0, 0x0, 0x0, 0xa, 0x0, 0x0, 0x0, 0x70,
};
return tpm_sendrecv_command(command, NULL, NULL);
}
uint32_t tpm_physical_set_deactivated(uint8_t state)
{
const uint8_t command[11] = {
0x0, 0xc1, 0x0, 0x0, 0x0, 0xb, 0x0, 0x0, 0x0, 0x72,
};
const size_t state_offset = 10;
uint8_t buf[COMMAND_BUFFER_SIZE];
if (pack_byte_string(buf, sizeof(buf), "sb",
0, command, sizeof(command),
state_offset, state))
return TPM_LIB_ERROR;
return tpm_sendrecv_command(buf, NULL, NULL);
}
uint32_t tpm_get_capability(uint32_t cap_area, uint32_t sub_cap,
void *cap, size_t count)
{
const uint8_t command[22] = {
0x0, 0xc1, /* TPM_TAG */
0x0, 0x0, 0x0, 0x16, /* parameter size */
0x0, 0x0, 0x0, 0x65, /* TPM_COMMAND_CODE */
0x0, 0x0, 0x0, 0x0, /* TPM_CAPABILITY_AREA */
0x0, 0x0, 0x0, 0x4, /* subcap size */
0x0, 0x0, 0x0, 0x0, /* subcap value */
};
const size_t cap_area_offset = 10;
const size_t sub_cap_offset = 18;
const size_t cap_offset = 14;
const size_t cap_size_offset = 10;
uint8_t buf[COMMAND_BUFFER_SIZE], response[COMMAND_BUFFER_SIZE];
size_t response_length = sizeof(response);
uint32_t cap_size;
uint32_t err;
if (pack_byte_string(buf, sizeof(buf), "sdd",
0, command, sizeof(command),
cap_area_offset, cap_area,
sub_cap_offset, sub_cap))
return TPM_LIB_ERROR;
err = tpm_sendrecv_command(buf, response, &response_length);
if (err)
return err;
if (unpack_byte_string(response, response_length, "d",
cap_size_offset, &cap_size))
return TPM_LIB_ERROR;
if (cap_size > response_length || cap_size > count)
return TPM_LIB_ERROR;
if (unpack_byte_string(response, response_length, "s",
cap_offset, cap, cap_size))
return TPM_LIB_ERROR;
return 0;
}