tpm.c File Reference

#include <commonlib/endian.h>
#include <string.h>
#include <types.h>
#include <delay.h>
#include <console/console.h>
#include <device/i2c_simple.h>
#include <endian.h>
#include <timer.h>
#include <security/tpm/tis.h>
#include "tpm.h"

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Data Structures
struct	tpm_inf_dev

Macros
#define	MAX_COUNT   3
#define	SLEEP_DURATION   60 /* in usec */
#define	SLEEP_DURATION_LONG   210 /* in usec */
#define	SLEEP_DURATION_PROBE_MS   1000 /* in msec */
#define	MAX_COUNT_LONG   50
#define	TPM_TIS_I2C_DID_VID_9635   0x000b15d1L
#define	TPM_TIS_I2C_DID_VID_9645   0x001a15d1L

Enumerations
enum	i2c_chip_type { SLB9635 , SLB9645 , UNKNOWN }

Functions
static int	iic_tpm_read (uint8_t addr, uint8_t *buffer, size_t len)
static int	iic_tpm_write_generic (uint8_t addr, uint8_t *buffer, size_t len, unsigned int sleep_time, uint8_t max_count)
static int	iic_tpm_write (uint8_t addr, uint8_t *buffer, size_t len)
static int	iic_tpm_write_long (uint8_t addr, uint8_t *buffer, size_t len)
static int	check_locality (struct tpm_chip *chip, int loc)
static void	release_locality (struct tpm_chip *chip, int loc, int force)
static int	request_locality (struct tpm_chip *chip, int loc)
static uint8_t	tpm_tis_i2c_status (struct tpm_chip *chip)
static void	tpm_tis_i2c_ready (struct tpm_chip *chip)
static ssize_t	get_burstcount (struct tpm_chip *chip)
static int	wait_for_stat (struct tpm_chip *chip, uint8_t mask, int *status)
static int	recv_data (struct tpm_chip *chip, uint8_t *buf, size_t count)
static int	tpm_tis_i2c_recv (struct tpm_chip *chip, uint8_t *buf, size_t count)
static int	tpm_tis_i2c_send (struct tpm_chip *chip, uint8_t *buf, size_t len)
int	tpm_vendor_probe (unsigned int bus, uint32_t addr)
int	tpm_vendor_init (struct tpm_chip *chip, unsigned int bus, uint32_t dev_addr)
void	tpm_vendor_cleanup (struct tpm_chip *chip)

Variables
static const char *const	chip_name []
static struct tpm_inf_dev	tpm_dev

Macro Definition Documentation

MAX_COUNT

#define MAX_COUNT   3

Definition at line 30 of file tpm.c.

MAX_COUNT_LONG

#define MAX_COUNT_LONG   50

Definition at line 41 of file tpm.c.

SLEEP_DURATION

#define SLEEP_DURATION   60 /* in usec */

Definition at line 32 of file tpm.c.

SLEEP_DURATION_LONG

#define SLEEP_DURATION_LONG   210 /* in usec */

Definition at line 33 of file tpm.c.

SLEEP_DURATION_PROBE_MS

#define SLEEP_DURATION_PROBE_MS   1000 /* in msec */

Definition at line 34 of file tpm.c.

TPM_TIS_I2C_DID_VID_9635

#define TPM_TIS_I2C_DID_VID_9635   0x000b15d1L

Definition at line 44 of file tpm.c.

TPM_TIS_I2C_DID_VID_9645

#define TPM_TIS_I2C_DID_VID_9645   0x001a15d1L

Definition at line 45 of file tpm.c.

Enumeration Type Documentation

i2c_chip_type

enum i2c_chip_type

Enumerator
SLB9635
SLB9645
UNKNOWN

Definition at line 47 of file tpm.c.

Function Documentation

check_locality()

static int check_locality ( struct tpm_chip *  chip, int  loc  )

static

Definition at line 222 of file tpm.c.

References buf, chip, iic_tpm_read(), tpm_vendor_specific::locality, TPM_ACCESS, TPM_ACCESS_ACTIVE_LOCALITY, TPM_ACCESS_VALID, and tpm_chip::vendor.

Referenced by request_locality().

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get_burstcount()

static ssize_t get_burstcount ( struct tpm_chip *  chip )

static

Definition at line 291 of file tpm.c.

References buf, chip, iic_tpm_read(), tpm_vendor_specific::locality, mdelay(), TPM_STS, TPM_TIMEOUT, and tpm_chip::vendor.

Referenced by recv_data(), and tpm_tis_i2c_send().

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iic_tpm_read()

static int iic_tpm_read ( uint8_t  addr, uint8_t *  buffer, size_t  len  )

static

Definition at line 85 of file tpm.c.

References addr, tpm_inf_dev::addr, buffer, tpm_inf_dev::bus, tpm_inf_dev::chip_type, count, i2c_msg::flags, I2C_M_RD, i2c_read_raw(), i2c_transfer(), i2c_write_raw(), i2c_msg::len, MAX_COUNT, SLB9635, tpm_inf_dev::sleep_short, tpm_dev, udelay(), and UNKNOWN.

Referenced by check_locality(), get_burstcount(), recv_data(), release_locality(), tpm_tis_i2c_status(), tpm_vendor_init(), and tpm_vendor_probe().

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iic_tpm_write()

static int iic_tpm_write ( uint8_t  addr, uint8_t *  buffer, size_t  len  )

static

Definition at line 206 of file tpm.c.

References addr, buffer, iic_tpm_write_generic(), i2c_msg::len, MAX_COUNT, tpm_inf_dev::sleep_short, and tpm_dev.

Referenced by release_locality(), request_locality(), and tpm_tis_i2c_send().

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iic_tpm_write_generic()

static int iic_tpm_write_generic ( uint8_t  addr, uint8_t *  buffer, size_t  len, unsigned int  sleep_time, uint8_t  max_count  )

static

Definition at line 154 of file tpm.c.

References addr, tpm_inf_dev::addr, BIOS_DEBUG, tpm_inf_dev::buf, buffer, tpm_inf_dev::bus, count, i2c_write_raw(), i2c_msg::len, memcpy(), printk, tpm_inf_dev::sleep_short, TPM_BUFSIZE, tpm_dev, and udelay().

Referenced by iic_tpm_write(), and iic_tpm_write_long().

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iic_tpm_write_long()

static int iic_tpm_write_long ( uint8_t  addr, uint8_t *  buffer, size_t  len  )

static

Definition at line 216 of file tpm.c.

References addr, buffer, iic_tpm_write_generic(), i2c_msg::len, MAX_COUNT_LONG, tpm_inf_dev::sleep_long, and tpm_dev.

Referenced by tpm_tis_i2c_ready().

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recv_data()

static int recv_data ( struct tpm_chip *  chip, uint8_t *  buf, size_t  count  )

static

Definition at line 328 of file tpm.c.

References buf, chip, count, get_burstcount(), iic_tpm_read(), tpm_vendor_specific::locality, TPM_DATA_FIFO, and tpm_chip::vendor.

Referenced by tpm_tis_i2c_recv().

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release_locality()

static void release_locality ( struct tpm_chip *  chip, int  loc, int  force  )

static

Definition at line 238 of file tpm.c.

References buf, iic_tpm_read(), iic_tpm_write(), TPM_ACCESS, TPM_ACCESS_ACTIVE_LOCALITY, TPM_ACCESS_REQUEST_PENDING, and TPM_ACCESS_VALID.

Referenced by tpm_vendor_cleanup(), and tpm_vendor_init().

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request_locality()

static int request_locality ( struct tpm_chip *  chip, int  loc  )

static

Definition at line 251 of file tpm.c.

References buf, check_locality(), chip, iic_tpm_write(), mdelay(), TPM_ACCESS, TPM_ACCESS_REQUEST_USE, and TPM_TIMEOUT.

Referenced by tpm_vendor_init().

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tpm_tis_i2c_ready()

static void tpm_tis_i2c_ready ( struct tpm_chip *  chip )

static

Definition at line 284 of file tpm.c.

References buf, chip, iic_tpm_write_long(), tpm_vendor_specific::locality, TPM_STS, TPM_STS_COMMAND_READY, and tpm_chip::vendor.

Referenced by tpm_tis_i2c_recv(), tpm_tis_i2c_send(), and tpm_vendor_init().

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tpm_tis_i2c_recv()

static int tpm_tis_i2c_recv ( struct tpm_chip *  chip, uint8_t *  buf, size_t  count  )

static

Definition at line 354 of file tpm.c.

References BIOS_DEBUG, buf, chip, count, memcpy(), printk, recv_data(), TPM_HEADER_SIZE, TPM_RSP_SIZE_BYTE, TPM_STS_DATA_AVAIL, TPM_STS_VALID, tpm_tis_i2c_ready(), and wait_for_stat().

Referenced by tpm_vendor_init().

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tpm_tis_i2c_send()

static int tpm_tis_i2c_send ( struct tpm_chip *  chip, uint8_t *  buf, size_t  len  )

static

Definition at line 400 of file tpm.c.

References buf, chip, count, get_burstcount(), iic_tpm_write(), i2c_msg::len, tpm_vendor_specific::locality, TPM_BUFSIZE, TPM_DATA_FIFO, TPM_STS, TPM_STS_COMMAND_READY, TPM_STS_DATA_EXPECT, TPM_STS_GO, TPM_STS_VALID, tpm_tis_i2c_ready(), tpm_tis_i2c_status(), tpm_chip::vendor, and wait_for_stat().

Referenced by tpm_vendor_init().

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tpm_tis_i2c_status()

static uint8_t tpm_tis_i2c_status ( struct tpm_chip *  chip )

static

Definition at line 272 of file tpm.c.

References buf, chip, iic_tpm_read(), tpm_vendor_specific::locality, TPM_STS, and tpm_chip::vendor.

Referenced by tpm_tis_i2c_send(), tpm_vendor_init(), and wait_for_stat().

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tpm_vendor_cleanup()

void tpm_vendor_cleanup

(

struct tpm_chip *

chip

)

Definition at line 555 of file tpm.c.

References chip, tpm_vendor_specific::locality, release_locality(), and tpm_chip::vendor.

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tpm_vendor_init()

int tpm_vendor_init	(	struct tpm_chip *	chip,
		unsigned int	bus,
		uint32_t	dev_addr
	)

Definition at line 496 of file tpm.c.

References tpm_inf_dev::addr, BIOS_DEBUG, BIOS_ERR, tpm_inf_dev::bus, tpm_vendor_specific::cancel, chip, chip_name, tpm_inf_dev::chip_type, iic_tpm_read(), tpm_chip::is_open, memset(), printk, tpm_vendor_specific::recv, release_locality(), tpm_vendor_specific::req_canceled, tpm_vendor_specific::req_complete_mask, tpm_vendor_specific::req_complete_val, request_locality(), tpm_vendor_specific::send, SLB9635, SLB9645, SLEEP_DURATION, SLEEP_DURATION_LONG, tpm_inf_dev::sleep_long, tpm_inf_dev::sleep_short, tpm_vendor_specific::status, tpm_dev, TPM_DID_VID, TPM_STS_COMMAND_READY, TPM_STS_DATA_AVAIL, TPM_STS_VALID, TPM_TIS_I2C_DID_VID_9635, TPM_TIS_I2C_DID_VID_9645, tpm_tis_i2c_ready(), tpm_tis_i2c_recv(), tpm_tis_i2c_send(), tpm_tis_i2c_status(), UNKNOWN, vendor, and tpm_chip::vendor.

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tpm_vendor_probe()

int tpm_vendor_probe	(	unsigned int	bus,
		uint32_t	addr
	)

Definition at line 455 of file tpm.c.

References addr, tpm_inf_dev::addr, BIOS_INFO, buf, tpm_inf_dev::bus, tpm_inf_dev::chip_type, iic_tpm_read(), printk, SLEEP_DURATION, SLEEP_DURATION_LONG, SLEEP_DURATION_PROBE_MS, tpm_inf_dev::sleep_long, tpm_inf_dev::sleep_short, stopwatch_duration_msecs(), stopwatch_expired(), stopwatch_init_msecs_expire(), TPM_ACCESS, tpm_dev, TPM_STS_VALID, udelay(), and UNKNOWN.

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wait_for_stat()

static int wait_for_stat ( struct tpm_chip *  chip, uint8_t  mask, int *  status  )

static

Definition at line 314 of file tpm.c.

References chip, mask, mdelay(), TPM_TIMEOUT, and tpm_tis_i2c_status().

Referenced by tpm_tis_i2c_recv(), and tpm_tis_i2c_send().

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Variable Documentation

chip_name

const char* const chip_name[]

static

Initial value:

= {
        [SLB9635] = "slb9635tt",
        [SLB9645] = "slb9645tt",
        [UNKNOWN] = "unknown/fallback to slb9635",
}

Definition at line 53 of file tpm.c.

Referenced by tpm_vendor_init().

tpm_dev

struct tpm_inf_dev tpm_dev

static

Definition at line 53 of file tpm.c.

Referenced by iic_tpm_read(), iic_tpm_write(), iic_tpm_write_generic(), iic_tpm_write_long(), tpm_vendor_init(), and tpm_vendor_probe().