tpm.c File Reference

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

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Data Structures
struct	spi_frame_header
union	fifo_transfer_buffer

Macros
#define	TPM_ACCESS_REG   (TPM_LOCALITY_0_SPI_BASE + 0)
#define	TPM_STS_REG   (TPM_LOCALITY_0_SPI_BASE + 0x18)
#define	TPM_DATA_FIFO_REG   (TPM_LOCALITY_0_SPI_BASE + 0x24)
#define	TPM_DID_VID_REG   (TPM_LOCALITY_0_SPI_BASE + 0xf00)
#define	TPM_RID_REG   (TPM_LOCALITY_0_SPI_BASE + 0xf04)
#define	TPM_FW_VER   (TPM_LOCALITY_0_SPI_BASE + 0xf90)
#define	CR50_BOARD_CFG   (TPM_LOCALITY_0_SPI_BASE + 0xfe0)
#define	CR50_TIMEOUT_INIT_MS   30000 /* Very long timeout for TPM init */
#define	MAX_STATUS_TIMEOUT   120

Enumerations
enum	fifo_transfer_direction { fifo_transmit = 0 , fifo_receive = 1 }

Functions
void	tpm2_get_info (struct tpm2_info *info)
__weak int	tis_plat_irq_status (void)
static enum cb_err	tpm_sync (void)
static enum cb_err	start_transaction (int read_write, size_t bytes, unsigned int addr)
static void	trace_dump (const char *prefix, uint32_t reg, size_t bytes, const uint8_t *buffer, int force)
static void	write_bytes (const void *buffer, size_t bytes)
static void	read_bytes (void *buffer, size_t bytes)
static enum cb_err	tpm2_write_reg (unsigned int reg_number, const void *buffer, size_t bytes)
static enum cb_err	tpm2_read_reg (unsigned int reg_number, void *buffer, size_t bytes)
static enum cb_err	read_tpm_sts (uint32_t *status)
static enum cb_err __must_check	write_tpm_sts (uint32_t status)
static uint32_t	get_burst_count (void)
static uint8_t	tpm2_read_access_reg (void)
static void	tpm2_write_access_reg (uint8_t cmd)
static enum cb_err	tpm2_claim_locality (void)
int	tpm2_init (struct spi_slave *spi_if)
static enum cb_err	wait_for_status (uint32_t status_mask, uint32_t status_expected)
static enum cb_err __must_check	fifo_transfer (size_t transfer_size, union fifo_transfer_buffer buffer, enum fifo_transfer_direction direction)
size_t	tpm2_process_command (const void *tpm2_command, size_t command_size, void *tpm2_response, size_t max_response)
enum cb_err	tis_vendor_write (unsigned int addr, const void *buffer, size_t bytes)
enum cb_err	tis_vendor_read (unsigned int addr, void *buffer, size_t bytes)

Variables
static struct spi_slave	spi_slave
static struct tpm2_info	tpm_info
static const int	debug_level_ = CONFIG(DEBUG_TPM)
static const uint32_t	supported_did_vids []

Macro Definition Documentation

CR50_BOARD_CFG

#define CR50_BOARD_CFG   (TPM_LOCALITY_0_SPI_BASE + 0xfe0)

Definition at line 33 of file tpm.c.

CR50_TIMEOUT_INIT_MS

#define CR50_TIMEOUT_INIT_MS   30000 /* Very long timeout for TPM init */

Definition at line 35 of file tpm.c.

MAX_STATUS_TIMEOUT

#define MAX_STATUS_TIMEOUT   120

Definition at line 516 of file tpm.c.

TPM_ACCESS_REG

#define TPM_ACCESS_REG   (TPM_LOCALITY_0_SPI_BASE + 0)

Definition at line 27 of file tpm.c.

TPM_DATA_FIFO_REG

#define TPM_DATA_FIFO_REG   (TPM_LOCALITY_0_SPI_BASE + 0x24)

Definition at line 29 of file tpm.c.

TPM_DID_VID_REG

#define TPM_DID_VID_REG   (TPM_LOCALITY_0_SPI_BASE + 0xf00)

Definition at line 30 of file tpm.c.

TPM_FW_VER

#define TPM_FW_VER   (TPM_LOCALITY_0_SPI_BASE + 0xf90)

Definition at line 32 of file tpm.c.

TPM_RID_REG

#define TPM_RID_REG   (TPM_LOCALITY_0_SPI_BASE + 0xf04)

Definition at line 31 of file tpm.c.

TPM_STS_REG

#define TPM_STS_REG   (TPM_LOCALITY_0_SPI_BASE + 0x18)

Definition at line 28 of file tpm.c.

Enumeration Type Documentation

fifo_transfer_direction

enum fifo_transfer_direction

Enumerator
fifo_transmit
fifo_receive

Definition at line 536 of file tpm.c.

Function Documentation

fifo_transfer()

static enum cb_err __must_check fifo_transfer ( size_t  transfer_size, union fifo_transfer_buffer  buffer, enum fifo_transfer_direction  direction  )

static

Definition at line 426 of file tpm.c.

References ARRAY_SIZE, BIOS_ERR, BIOS_INFO, CB_SUCCESS, CONFIG, cr50_get_firmware_version(), cr50_set_board_cfg(), tpm2_info::device_id, mdelay(), memcpy(), NULL, printk, read_tpm_sts(), tpm2_info::revision, supported_did_vids, tis_plat_irq_status(), tpm2_claim_locality(), tpm2_read_reg(), TPM_DID_VID_REG, tpm_first_access_this_boot(), tpm_info, TPM_RID_REG, TPM_STS_FAMILY_MASK, TPM_STS_FAMILY_TPM_2_0, and tpm2_info::vendor_id.

Referenced by tis_vendor_read().

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get_burst_count()

static uint32_t get_burst_count ( void  )

static

Definition at line 346 of file tpm.c.

References read_tpm_sts(), TPM_STS_BURST_COUNT_MASK, and TPM_STS_BURST_COUNT_SHIFT.

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read_bytes()

static void read_bytes ( void *  buffer, size_t  bytes  )

static

Definition at line 290 of file tpm.c.

References buffer, NULL, and spi_xfer().

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read_tpm_sts()

static enum cb_err read_tpm_sts ( uint32_t *  status )

static

Definition at line 290 of file tpm.c.

Referenced by fifo_transfer(), get_burst_count(), and tis_vendor_read().

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start_transaction()

static enum cb_err start_transaction ( int  read_write, size_t  bytes, unsigned int  addr  )

static

Definition at line 62 of file tpm.c.

References BIOS_WARNING, mdelay(), and printk.

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tis_plat_irq_status()

__weak int tis_plat_irq_status

(

void

)

Definition at line 62 of file tpm.c.

Referenced by fifo_transfer().

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tis_vendor_read()

enum cb_err tis_vendor_read	(	unsigned int	addr,
		void *	buffer,
		size_t	bytes
	)

Definition at line 593 of file tpm.c.

References BIOS_DEBUG, BIOS_ERR, CB_SUCCESS, debug_level_, fifo_receive, fifo_transfer(), fifo_transmit, printk, read_be32(), read_tpm_sts(), fifo_transfer_buffer::rx_buffer, tpm2_read_reg(), TPM_DATA_FIFO_REG, tpm_info, TPM_STS_COMMAND_READY, TPM_STS_DATA_AVAIL, TPM_STS_GO, TPM_STS_VALID, trace_dump(), fifo_transfer_buffer::tx_buffer, tpm2_info::vendor_id, wait_for_status(), and write_tpm_sts().

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tis_vendor_write()

enum cb_err tis_vendor_write	(	unsigned int	addr,
		const void *	buffer,
		size_t	bytes
	)

Definition at line 593 of file tpm.c.

tpm2_claim_locality()

static enum cb_err tpm2_claim_locality ( void  )

static

Definition at line 362 of file tpm.c.

References assert, tpm2_write_reg(), and TPM_ACCESS_REG.

Referenced by fifo_transfer().

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tpm2_get_info()

void tpm2_get_info

(

struct tpm2_info *

info

)

Definition at line 57 of file tpm.c.

References info, and tpm_info.

tpm2_init()

int tpm2_init

(

struct spi_slave *

spi_if

)

Definition at line 426 of file tpm.c.

tpm2_process_command()

size_t tpm2_process_command	(	const void *	tpm2_command,
		size_t	command_size,
		void *	tpm2_response,
		size_t	max_response
	)

Definition at line 593 of file tpm.c.

tpm2_read_access_reg()

static uint8_t tpm2_read_access_reg ( void  )

static

Definition at line 354 of file tpm.c.

References tpm2_read_reg(), TPM_ACCESS_ESTABLISHMENT, and TPM_ACCESS_REG.

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tpm2_read_reg()

static enum cb_err tpm2_read_reg ( unsigned int  reg_number, void *  buffer, size_t  bytes  )

static

Definition at line 290 of file tpm.c.

Referenced by fifo_transfer(), tis_vendor_read(), and tpm2_read_access_reg().

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tpm2_write_access_reg()

static void tpm2_write_access_reg ( uint8_t  cmd )

static

Definition at line 362 of file tpm.c.

tpm2_write_reg()

static enum cb_err tpm2_write_reg ( unsigned int  reg_number, const void *  buffer, size_t  bytes  )

static

Definition at line 290 of file tpm.c.

Referenced by tpm2_claim_locality().

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tpm_sync()

static enum cb_err tpm_sync ( void  )

static

Definition at line 62 of file tpm.c.

trace_dump()

static void trace_dump ( const char *  prefix, uint32_t  reg, size_t  bytes, const uint8_t *  buffer, int  force  )

static

Definition at line 224 of file tpm.c.

References BIOS_DEBUG, buffer, debug_level_, printk, and TPM_DATA_FIFO_REG.

Referenced by tis_vendor_read().

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wait_for_status()

static enum cb_err wait_for_status ( uint32_t  status_mask, uint32_t  status_expected  )

static

Definition at line 426 of file tpm.c.

Referenced by tis_vendor_read().

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write_bytes()

static void write_bytes ( const void *  buffer, size_t  bytes  )

static

Definition at line 281 of file tpm.c.

References buffer, NULL, and spi_xfer().

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write_tpm_sts()

static enum cb_err __must_check write_tpm_sts ( uint32_t  status )

static

Definition at line 290 of file tpm.c.

Referenced by tis_vendor_read().

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Variable Documentation

debug_level_

const int debug_level_ = CONFIG(DEBUG_TPM)

static

Definition at line 47 of file tpm.c.

Referenced by tis_vendor_read(), and trace_dump().

spi_slave

struct spi_slave spi_slave

static

Definition at line 1 of file tpm.c.

supported_did_vids

const uint32_t supported_did_vids[]

static

Initial value:

= {
        0x00281ae0,  
        0x504a6666,  
        0x0000104a   
}

Definition at line 420 of file tpm.c.

Referenced by fifo_transfer().

tpm_info

struct tpm2_info tpm_info

static

Definition at line 1 of file tpm.c.

Referenced by fifo_transfer(), tis_vendor_read(), and tpm2_get_info().