smbus.c File Reference

#include <arch/io.h>
#include <console/console.h>
#include <device/smbus_def.h>
#include <device/smbus_host.h>
#include <types.h>

Include dependency graph for smbus.c:

Go to the source code of this file.

Macros
#define	dprintk(args...)   do {} while (0)
#define	SMBHSTSTAT   0x0
#define	SMBHSTCTL   0x2
#define	SMBHSTCMD   0x3
#define	SMBXMITADD   0x4
#define	SMBHSTDAT0   0x5
#define	SMBHSTDAT1   0x6
#define	SMBBLKDAT   0x7
#define	SMBTRNSADD   0x9
#define	SMBSLVDATA   0xa
#define	SMLINK_PIN_CTL   0xe
#define	SMBUS_PIN_CTL   0xf
#define	SMBSLVCMD   0x11
#define	SMB_RCV_SLVA   SMBTRNSADD
#define	I801_QUICK   (0 << 2)
#define	I801_BYTE   (1 << 2)
#define	I801_BYTE_DATA   (2 << 2)
#define	I801_WORD_DATA   (3 << 2)
#define	I801_PROCESS_CALL   (4 << 2)
#define	I801_BLOCK_DATA   (5 << 2)
#define	I801_I2C_BLOCK_DATA   (6 << 2) /* ICH5 and later */
#define	SMBHSTCNT_INTREN   (1 << 0)
#define	SMBHSTCNT_KILL   (1 << 1)
#define	SMBHSTCNT_LAST_BYTE   (1 << 5)
#define	SMBHSTCNT_START   (1 << 6)
#define	SMBHSTCNT_PEC_EN   (1 << 7) /* ICH3 and later */
#define	SMBHSTSTS_BYTE_DONE   (1 << 7)
#define	SMBHSTSTS_INUSE_STS   (1 << 6)
#define	SMBHSTSTS_SMBALERT_STS   (1 << 5)
#define	SMBHSTSTS_FAILED   (1 << 4)
#define	SMBHSTSTS_BUS_ERR   (1 << 3)
#define	SMBHSTSTS_DEV_ERR   (1 << 2)
#define	SMBHSTSTS_INTR   (1 << 1)
#define	SMBHSTSTS_HOST_BUSY   (1 << 0)
#define	XMIT_WRITE(dev)   (((dev) << 1) | 0)
#define	XMIT_READ(dev)   (((dev) << 1) | 1)
#define	SMBUS_TIMEOUT   (10 * 1000 * 100)
#define	SMBUS_BLOCK_MAXLEN   32
#define	BLOCK_READ   0
#define	BLOCK_WRITE   (1 << 0)
#define	BLOCK_I2C   (1 << 1)

Functions
static void	smbus_delay (void)
static void	host_outb (uintptr_t base, u8 reg, u8 value)
static u8	host_inb (uintptr_t base, u8 reg)
static void	host_and_or (uintptr_t base, u8 reg, u8 mask, u8 or)
void	smbus_host_reset (uintptr_t base)
void	smbus_set_slave_addr (uintptr_t base, u8 slave_address)
static int	host_completed (u8 status)
static int	recover_master (uintptr_t base, int ret)
static int	cb_err_from_stat (u8 status)
static int	setup_command (uintptr_t base, u8 ctrl, u8 xmitadd)
static int	execute_command (uintptr_t base)
static int	complete_command (uintptr_t base)
static int	smbus_read_cmd (uintptr_t base, u8 ctrl, u8 device, u8 address)
static int	smbus_write_cmd (uintptr_t base, u8 ctrl, u8 device, u8 address, u16 data)
static int	block_cmd_loop (uintptr_t base, u8 *buf, size_t max_bytes, int flags)
int	do_smbus_read_byte (uintptr_t base, u8 device, u8 address)
int	do_smbus_read_word (uintptr_t base, u8 device, u8 address)
int	do_smbus_write_byte (uintptr_t base, u8 device, u8 address, u8 data)
int	do_smbus_write_word (uintptr_t base, u8 device, u8 address, u16 data)
int	do_smbus_block_read (uintptr_t base, u8 device, u8 cmd, size_t max_bytes, u8 *buf)
int	do_smbus_process_call (uintptr_t base, u8 device, u8 cmd, u16 data, u16 *buf)
int	do_smbus_block_write (uintptr_t base, u8 device, u8 cmd, const size_t bytes, const u8 *buf)
static int	has_i2c_read_command (void)
int	do_i2c_eeprom_read (uintptr_t base, u8 device, u8 offset, const size_t bytes, u8 *buf)
int	do_i2c_block_write (uintptr_t base, u8 device, size_t bytes, u8 *buf)

Macro Definition Documentation

BLOCK_I2C

#define BLOCK_I2C   (1 << 1)

Definition at line 67 of file smbus.c.

BLOCK_READ

#define BLOCK_READ   0

Definition at line 65 of file smbus.c.

BLOCK_WRITE

#define BLOCK_WRITE   (1 << 0)

Definition at line 66 of file smbus.c.

dprintk

#define dprintk

(

args...

)

do {} while (0)

Definition at line 12 of file smbus.c.

I801_BLOCK_DATA

#define I801_BLOCK_DATA   (5 << 2)

Definition at line 37 of file smbus.c.

I801_BYTE

#define I801_BYTE   (1 << 2)

Definition at line 33 of file smbus.c.

I801_BYTE_DATA

#define I801_BYTE_DATA   (2 << 2)

Definition at line 34 of file smbus.c.

I801_I2C_BLOCK_DATA

#define I801_I2C_BLOCK_DATA   (6 << 2) /* ICH5 and later */

Definition at line 38 of file smbus.c.

I801_PROCESS_CALL

#define I801_PROCESS_CALL   (4 << 2)

Definition at line 36 of file smbus.c.

I801_QUICK

#define I801_QUICK   (0 << 2)

Definition at line 32 of file smbus.c.

I801_WORD_DATA

#define I801_WORD_DATA   (3 << 2)

Definition at line 35 of file smbus.c.

SMB_RCV_SLVA

#define SMB_RCV_SLVA   SMBTRNSADD

Definition at line 29 of file smbus.c.

SMBBLKDAT

#define SMBBLKDAT   0x7

Definition at line 22 of file smbus.c.

SMBHSTCMD

#define SMBHSTCMD   0x3

Definition at line 18 of file smbus.c.

SMBHSTCNT_INTREN

#define SMBHSTCNT_INTREN   (1 << 0)

Definition at line 41 of file smbus.c.

SMBHSTCNT_KILL

#define SMBHSTCNT_KILL   (1 << 1)

Definition at line 42 of file smbus.c.

SMBHSTCNT_LAST_BYTE

#define SMBHSTCNT_LAST_BYTE   (1 << 5)

Definition at line 43 of file smbus.c.

SMBHSTCNT_PEC_EN

#define SMBHSTCNT_PEC_EN   (1 << 7) /* ICH3 and later */

Definition at line 45 of file smbus.c.

SMBHSTCNT_START

#define SMBHSTCNT_START   (1 << 6)

Definition at line 44 of file smbus.c.

SMBHSTCTL

#define SMBHSTCTL   0x2

Definition at line 17 of file smbus.c.

SMBHSTDAT0

#define SMBHSTDAT0   0x5

Definition at line 20 of file smbus.c.

SMBHSTDAT1

#define SMBHSTDAT1   0x6

Definition at line 21 of file smbus.c.

SMBHSTSTAT

#define SMBHSTSTAT   0x0

Definition at line 16 of file smbus.c.

SMBHSTSTS_BUS_ERR

#define SMBHSTSTS_BUS_ERR   (1 << 3)

Definition at line 52 of file smbus.c.

SMBHSTSTS_BYTE_DONE

#define SMBHSTSTS_BYTE_DONE   (1 << 7)

Definition at line 48 of file smbus.c.

SMBHSTSTS_DEV_ERR

#define SMBHSTSTS_DEV_ERR   (1 << 2)

Definition at line 53 of file smbus.c.

SMBHSTSTS_FAILED

#define SMBHSTSTS_FAILED   (1 << 4)

Definition at line 51 of file smbus.c.

SMBHSTSTS_HOST_BUSY

#define SMBHSTSTS_HOST_BUSY   (1 << 0)

Definition at line 55 of file smbus.c.

SMBHSTSTS_INTR

#define SMBHSTSTS_INTR   (1 << 1)

Definition at line 54 of file smbus.c.

SMBHSTSTS_INUSE_STS

#define SMBHSTSTS_INUSE_STS   (1 << 6)

Definition at line 49 of file smbus.c.

SMBHSTSTS_SMBALERT_STS

#define SMBHSTSTS_SMBALERT_STS   (1 << 5)

Definition at line 50 of file smbus.c.

SMBSLVCMD

#define SMBSLVCMD   0x11

Definition at line 27 of file smbus.c.

SMBSLVDATA

#define SMBSLVDATA   0xa

Definition at line 24 of file smbus.c.

SMBTRNSADD

#define SMBTRNSADD   0x9

Definition at line 23 of file smbus.c.

SMBUS_BLOCK_MAXLEN

#define SMBUS_BLOCK_MAXLEN   32

Definition at line 62 of file smbus.c.

SMBUS_PIN_CTL

#define SMBUS_PIN_CTL   0xf

Definition at line 26 of file smbus.c.

SMBUS_TIMEOUT

#define SMBUS_TIMEOUT   (10 * 1000 * 100)

Definition at line 61 of file smbus.c.

SMBXMITADD

#define SMBXMITADD   0x4

Definition at line 19 of file smbus.c.

SMLINK_PIN_CTL

#define SMLINK_PIN_CTL   0xe

Definition at line 25 of file smbus.c.

XMIT_READ

#define XMIT_READ

(

dev

)

(((dev) << 1) | 1)

Definition at line 59 of file smbus.c.

XMIT_WRITE

#define XMIT_WRITE

(

dev

)

(((dev) << 1) | 0)

Definition at line 58 of file smbus.c.

Function Documentation

block_cmd_loop()

static int block_cmd_loop ( uintptr_t  base, u8 *  buf, size_t  max_bytes, int  flags  )

static

Definition at line 269 of file smbus.c.

References base, BLOCK_I2C, BLOCK_WRITE, buf, cb_err_from_stat(), dprintk, execute_command(), host_and_or(), host_completed(), host_inb(), host_outb(), recover_master(), SMBBLKDAT, SMBHSTCNT_LAST_BYTE, SMBHSTCTL, SMBHSTDAT0, SMBHSTSTAT, SMBHSTSTS_BYTE_DONE, SMBUS_ERROR, SMBUS_TIMEOUT, and SMBUS_WAIT_UNTIL_DONE_TIMEOUT.

Referenced by do_i2c_block_write(), do_i2c_eeprom_read(), do_smbus_block_read(), and do_smbus_block_write().

Here is the call graph for this function:

Here is the caller graph for this function:

cb_err_from_stat()

static int cb_err_from_stat ( u8  status )

static

Definition at line 127 of file smbus.c.

References SMBHSTSTS_BYTE_DONE, SMBHSTSTS_INTR, SMBHSTSTS_INUSE_STS, SMBHSTSTS_SMBALERT_STS, and SMBUS_ERROR.

Referenced by block_cmd_loop(), and complete_command().

Here is the caller graph for this function:

complete_command()

static int complete_command ( uintptr_t  base )

static

Definition at line 191 of file smbus.c.

References base, cb_err_from_stat(), host_completed(), host_inb(), recover_master(), SMBHSTSTAT, smbus_delay(), SMBUS_TIMEOUT, and SMBUS_WAIT_UNTIL_DONE_TIMEOUT.

Referenced by do_smbus_process_call(), smbus_read_cmd(), and smbus_write_cmd().

Here is the call graph for this function:

Here is the caller graph for this function:

do_i2c_block_write()

int do_i2c_block_write	(	uintptr_t	base,
		u8	device,
		size_t	bytes,
		u8 *	buf
	)

Definition at line 503 of file smbus.c.

References base, block_cmd_loop(), BLOCK_WRITE, buf, CONFIG, host_outb(), I801_BLOCK_DATA, setup_command(), SMBHSTCMD, SMBHSTDAT1, SMBUS_BLOCK_MAXLEN, SMBUS_ERROR, and XMIT_WRITE.

Referenced by smbus_i2c_block_write().

Here is the call graph for this function:

Here is the caller graph for this function:

do_i2c_eeprom_read()

int do_i2c_eeprom_read	(	uintptr_t	base,
		u8	device,
		u8	offset,
		const size_t	bytes,
		u8 *	buf
	)

Definition at line 466 of file smbus.c.

References base, block_cmd_loop(), BLOCK_I2C, BLOCK_READ, buf, has_i2c_read_command(), host_outb(), I801_I2C_BLOCK_DATA, offset, setup_command(), SMBHSTDAT1, SMBUS_ERROR, and XMIT_WRITE.

Here is the call graph for this function:

do_smbus_block_read()

int do_smbus_block_read	(	uintptr_t	base,
		u8	device,
		u8	cmd,
		size_t	max_bytes,
		u8 *	buf
	)

Definition at line 368 of file smbus.c.

References base, block_cmd_loop(), BLOCK_READ, buf, host_inb(), host_outb(), I801_BLOCK_DATA, MIN, setup_command(), SMBHSTCMD, SMBHSTDAT0, SMBUS_BLOCK_MAXLEN, SMBUS_ERROR, and XMIT_READ.

Here is the call graph for this function:

do_smbus_block_write()

int do_smbus_block_write	(	uintptr_t	base,
		u8	device,
		u8	cmd,
		const size_t	bytes,
		const u8 *	buf
	)

Definition at line 431 of file smbus.c.

References base, block_cmd_loop(), BLOCK_WRITE, buf, host_outb(), I801_BLOCK_DATA, setup_command(), SMBHSTCMD, SMBUS_BLOCK_MAXLEN, SMBUS_ERROR, and XMIT_WRITE.

Referenced by eeprom_write_byte(), and lsmbus_block_write().

Here is the call graph for this function:

Here is the caller graph for this function:

do_smbus_process_call()

int do_smbus_process_call	(	uintptr_t	base,
		u8	device,
		u8	cmd,
		u16	data,
		u16 *	buf
	)

Definition at line 399 of file smbus.c.

References base, buf, complete_command(), execute_command(), host_inb(), host_outb(), I801_PROCESS_CALL, setup_command(), SMBHSTCMD, SMBHSTDAT0, SMBHSTDAT1, and XMIT_WRITE.

Referenced by eeprom_read_buffer().

Here is the call graph for this function:

Here is the caller graph for this function:

do_smbus_read_byte()

int do_smbus_read_byte	(	uintptr_t	base,
		u8	device,
		u8	address
	)

Definition at line 348 of file smbus.c.

References address, base, controller_read8(), controller_write8(), I801_BYTE_DATA, SMBHST_CTRL_BDT_RW, SMBHST_CTRL_MODE_BITS, SMBHST_CTRL_STRT, SMBHSTADDR, SMBHSTCMD, SMBHSTCTRL, SMBHSTDAT0, smbus_read_cmd(), smbus_wait_until_done(), and smbus_wait_until_ready().

Referenced by lsmbus_read_byte(), and readspd().

Here is the call graph for this function:

Here is the caller graph for this function:

do_smbus_read_word()

int do_smbus_read_word	(	uintptr_t	base,
		u8	device,
		u8	address
	)

Definition at line 353 of file smbus.c.

References address, base, I801_WORD_DATA, and smbus_read_cmd().

Here is the call graph for this function:

do_smbus_write_byte()

int do_smbus_write_byte	(	uintptr_t	base,
		u8	device,
		u8	address,
		u8	data
	)

Definition at line 358 of file smbus.c.

References address, base, controller_read8(), controller_write8(), I801_BYTE_DATA, SMBHST_CTRL_BDT_RW, SMBHST_CTRL_MODE_BITS, SMBHST_CTRL_STRT, SMBHSTADDR, SMBHSTCMD, SMBHSTCTRL, SMBHSTDAT0, smbus_wait_until_done(), smbus_wait_until_ready(), smbus_write_cmd(), and val.

Referenced by board_BeforeAgesa(), and lsmbus_write_byte().

Here is the call graph for this function:

Here is the caller graph for this function:

do_smbus_write_word()

int do_smbus_write_word	(	uintptr_t	base,
		u8	device,
		u8	address,
		u16	data
	)

Definition at line 363 of file smbus.c.

References address, base, I801_WORD_DATA, and smbus_write_cmd().

Here is the call graph for this function:

execute_command()

static int execute_command ( uintptr_t  base )

static

Definition at line 165 of file smbus.c.

References base, host_and_or(), host_inb(), recover_master(), SMBHSTCNT_START, SMBHSTCTL, SMBHSTSTAT, SMBHSTSTS_INUSE_STS, SMBHSTSTS_SMBALERT_STS, smbus_delay(), SMBUS_TIMEOUT, and SMBUS_WAIT_UNTIL_ACTIVE_TIMEOUT.

Referenced by block_cmd_loop(), do_smbus_process_call(), smbus_read_cmd(), and smbus_write_cmd().

Here is the call graph for this function:

Here is the caller graph for this function:

has_i2c_read_command()

static int has_i2c_read_command ( void  )

static

Definition at line 458 of file smbus.c.

References CONFIG.

Referenced by do_i2c_eeprom_read().

Here is the caller graph for this function:

host_and_or()

static void host_and_or ( uintptr_t  base, u8  reg, u8  mask, u8  or  )

static

Definition at line 84 of file smbus.c.

References base, host_inb(), host_outb(), mask, and value.

Referenced by block_cmd_loop(), execute_command(), setup_command(), and smbus_host_reset().

Here is the call graph for this function:

Here is the caller graph for this function:

host_completed()

static int host_completed ( u8  status )

static

Definition at line 107 of file smbus.c.

References SMBHSTSTS_BYTE_DONE, SMBHSTSTS_HOST_BUSY, SMBHSTSTS_INUSE_STS, and SMBHSTSTS_SMBALERT_STS.

Referenced by block_cmd_loop(), and complete_command().

Here is the caller graph for this function:

host_inb()

static u8 host_inb ( uintptr_t  base, u8  reg  )

static

Definition at line 79 of file smbus.c.

References base, and inb().

Referenced by block_cmd_loop(), complete_command(), do_smbus_block_read(), do_smbus_process_call(), execute_command(), host_and_or(), setup_command(), and smbus_read_cmd().

Here is the call graph for this function:

Here is the caller graph for this function:

host_outb()

static void host_outb ( uintptr_t  base, u8  reg, u8  value  )

static

Definition at line 74 of file smbus.c.

References base, outb(), and value.

Referenced by block_cmd_loop(), do_i2c_block_write(), do_i2c_eeprom_read(), do_smbus_block_read(), do_smbus_block_write(), do_smbus_process_call(), host_and_or(), setup_command(), smbus_host_reset(), smbus_read_cmd(), smbus_set_slave_addr(), and smbus_write_cmd().

Here is the call graph for this function:

Here is the caller graph for this function:

recover_master()

static int recover_master ( uintptr_t  base, int  ret  )

static

Definition at line 118 of file smbus.c.

References BIOS_ERR, and printk.

Referenced by block_cmd_loop(), complete_command(), execute_command(), and setup_command().

Here is the caller graph for this function:

setup_command()

static int setup_command ( uintptr_t  base, u8  ctrl, u8  xmitadd  )

static

Definition at line 139 of file smbus.c.

References base, host_and_or(), host_inb(), host_outb(), recover_master(), SMBHSTCTL, SMBHSTSTAT, SMBHSTSTS_HOST_BUSY, smbus_delay(), SMBUS_TIMEOUT, SMBUS_WAIT_UNTIL_READY_TIMEOUT, and SMBXMITADD.

Referenced by do_i2c_block_write(), do_i2c_eeprom_read(), do_smbus_block_read(), do_smbus_block_write(), do_smbus_process_call(), smbus_read_cmd(), and smbus_write_cmd().

Here is the call graph for this function:

Here is the caller graph for this function:

smbus_delay()

static void smbus_delay ( void  )

static

Definition at line 69 of file smbus.c.

References inb().

Referenced by complete_command(), execute_command(), and setup_command().

Here is the call graph for this function:

Here is the caller graph for this function:

smbus_host_reset()

void smbus_host_reset

(

uintptr_t

base

)

Definition at line 93 of file smbus.c.

References base, host_and_or(), host_outb(), SMBHSTCTL, and SMBHSTSTAT.

Referenced by enable_smbus().

Here is the call graph for this function:

Here is the caller graph for this function:

smbus_read_cmd()

static int smbus_read_cmd ( uintptr_t  base, u8  ctrl, u8  device, u8  address  )

static

Definition at line 208 of file smbus.c.

References address, base, complete_command(), execute_command(), host_inb(), host_outb(), I801_WORD_DATA, setup_command(), SMBHSTCMD, SMBHSTDAT0, SMBHSTDAT1, word, and XMIT_READ.

Referenced by do_smbus_read_byte(), and do_smbus_read_word().

Here is the call graph for this function:

Here is the caller graph for this function:

smbus_set_slave_addr()

void smbus_set_slave_addr	(	uintptr_t	base,
		u8	slave_address
	)

Definition at line 102 of file smbus.c.

References base, host_outb(), and SMB_RCV_SLVA.

Referenced by pch_smbus_init().

Here is the call graph for this function:

Here is the caller graph for this function:

smbus_write_cmd()

static int smbus_write_cmd ( uintptr_t  base, u8  ctrl, u8  device, u8  address, u16  data  )

static

Definition at line 243 of file smbus.c.

References address, base, complete_command(), execute_command(), host_outb(), I801_WORD_DATA, setup_command(), SMBHSTCMD, SMBHSTDAT0, SMBHSTDAT1, and XMIT_WRITE.

Referenced by do_smbus_write_byte(), and do_smbus_write_word().

Here is the call graph for this function:

Here is the caller graph for this function: