kempld_i2c.c File Reference

#include <stdint.h>
#include <console/console.h>
#include <device/device.h>
#include <device/i2c_bus.h>
#include <timer.h>
#include <delay.h>
#include "chip.h"
#include "kempld.h"
#include "kempld_internal.h"

Include dependency graph for kempld_i2c.c:

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Data Structures
struct	kempld_i2c_data

Macros
#define	KEMPLD_I2C_PRELOW   0x0b
#define	KEMPLD_I2C_PREHIGH   0x0c
#define	KEMPLD_I2C_DATA   0x0e
#define	KEMPLD_I2C_CTRL   0x0d
#define	I2C_CTRL_IEN   0x40
#define	I2C_CTRL_EN   0x80
#define	KEMPLD_I2C_STAT   0x0f
#define	I2C_STAT_IF   0x01
#define	I2C_STAT_TIP   0x02
#define	I2C_STAT_ARBLOST   0x20
#define	I2C_STAT_BUSY   0x40
#define	I2C_STAT_NACK   0x80
#define	KEMPLD_I2C_CMD   0x0f
#define	I2C_CMD_START   0x91
#define	I2C_CMD_STOP   0x41
#define	I2C_CMD_READ   0x21
#define	I2C_CMD_WRITE   0x11
#define	I2C_CMD_READ_ACK   0x21
#define	I2C_CMD_READ_NACK   0x29
#define	I2C_CMD_IACK   0x01
#define	EIO   5
#define	ENXIO   6
#define	EAGAIN   11
#define	EBUSY   16
#define	ETIMEDOUT   110

Enumerations
enum	kempld_i2c_state {   STATE_DONE = 0 , STATE_INIT , STATE_ADDR , STATE_ADDR10 ,   STATE_START , STATE_WRITE , STATE_READ , STATE_ERROR }

Functions
static int	kempld_i2c_process (struct kempld_i2c_data *const i2c)
static int	kempld_i2c_xfer (struct device *const dev, const struct i2c_msg *const msgs, const size_t num)
void	kempld_i2c_device_init (struct device *const dev)

Variables
static const struct i2c_bus_operations	kempld_i2c_bus_ops
static struct device_operations	kempld_i2c_dev_ops

Macro Definition Documentation

EAGAIN

#define EAGAIN   11

Definition at line 46 of file kempld_i2c.c.

EBUSY

#define EBUSY   16

Definition at line 47 of file kempld_i2c.c.

EIO

#define EIO   5

Definition at line 44 of file kempld_i2c.c.

ENXIO

#define ENXIO   6

Definition at line 45 of file kempld_i2c.c.

ETIMEDOUT

#define ETIMEDOUT   110

Definition at line 48 of file kempld_i2c.c.

I2C_CMD_IACK

#define I2C_CMD_IACK   0x01

Definition at line 42 of file kempld_i2c.c.

I2C_CMD_READ

#define I2C_CMD_READ   0x21

Definition at line 38 of file kempld_i2c.c.

I2C_CMD_READ_ACK

#define I2C_CMD_READ_ACK   0x21

Definition at line 40 of file kempld_i2c.c.

I2C_CMD_READ_NACK

#define I2C_CMD_READ_NACK   0x29

Definition at line 41 of file kempld_i2c.c.

I2C_CMD_START

#define I2C_CMD_START   0x91

Definition at line 36 of file kempld_i2c.c.

I2C_CMD_STOP

#define I2C_CMD_STOP   0x41

Definition at line 37 of file kempld_i2c.c.

I2C_CMD_WRITE

#define I2C_CMD_WRITE   0x11

Definition at line 39 of file kempld_i2c.c.

I2C_CTRL_EN

#define I2C_CTRL_EN   0x80

Definition at line 26 of file kempld_i2c.c.

I2C_CTRL_IEN

#define I2C_CTRL_IEN   0x40

Definition at line 25 of file kempld_i2c.c.

I2C_STAT_ARBLOST

#define I2C_STAT_ARBLOST   0x20

Definition at line 31 of file kempld_i2c.c.

I2C_STAT_BUSY

#define I2C_STAT_BUSY   0x40

Definition at line 32 of file kempld_i2c.c.

I2C_STAT_IF

#define I2C_STAT_IF   0x01

Definition at line 29 of file kempld_i2c.c.

I2C_STAT_NACK

#define I2C_STAT_NACK   0x80

Definition at line 33 of file kempld_i2c.c.

I2C_STAT_TIP

#define I2C_STAT_TIP   0x02

Definition at line 30 of file kempld_i2c.c.

KEMPLD_I2C_CMD

#define KEMPLD_I2C_CMD   0x0f

Definition at line 35 of file kempld_i2c.c.

KEMPLD_I2C_CTRL

#define KEMPLD_I2C_CTRL   0x0d

Definition at line 24 of file kempld_i2c.c.

KEMPLD_I2C_DATA

#define KEMPLD_I2C_DATA   0x0e

Definition at line 22 of file kempld_i2c.c.

KEMPLD_I2C_PREHIGH

#define KEMPLD_I2C_PREHIGH   0x0c

Definition at line 21 of file kempld_i2c.c.

KEMPLD_I2C_PRELOW

#define KEMPLD_I2C_PRELOW   0x0b

Definition at line 20 of file kempld_i2c.c.

KEMPLD_I2C_STAT

#define KEMPLD_I2C_STAT   0x0f

Definition at line 28 of file kempld_i2c.c.

Enumeration Type Documentation

kempld_i2c_state

enum kempld_i2c_state

Enumerator
STATE_DONE
STATE_INIT
STATE_ADDR
STATE_ADDR10
STATE_START
STATE_WRITE
STATE_READ
STATE_ERROR

Definition at line 50 of file kempld_i2c.c.

Function Documentation

kempld_i2c_device_init()

void kempld_i2c_device_init

(

struct device *const

dev

)

Definition at line 228 of file kempld_i2c.c.

References BIOS_INFO, BIOS_NOTICE, device::chip_info, config, I2C_CMD_IACK, I2C_CMD_STOP, I2C_CTRL_EN, I2C_CTRL_IEN, I2C_STAT_BUSY, KEMPLD_CFG, KEMPLD_CFG_GPIO_I2C_MUX, KEMPLD_CLK, kempld_get_mutex(), KEMPLD_I2C_CMD, KEMPLD_I2C_CTRL, kempld_i2c_dev_ops, KEMPLD_I2C_FREQ_MAX, KEMPLD_I2C_FREQ_STANDARD_MODE_100KHZ, KEMPLD_I2C_PREHIGH, KEMPLD_I2C_PRELOW, KEMPLD_I2C_STAT, kempld_read8(), kempld_release_mutex(), KEMPLD_SPEC, KEMPLD_SPEC_GET_MAJOR, kempld_write8(), device::ops, and printk.

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kempld_i2c_process()

static int kempld_i2c_process ( struct kempld_i2c_data *const  i2c )

static

Definition at line 71 of file kempld_i2c.c.

References addr, i2c_msg::buf, EAGAIN, EBUSY, EIO, ENXIO, i2c_msg::flags, I2C_CMD_IACK, I2C_CMD_READ_ACK, I2C_CMD_READ_NACK, I2C_CMD_START, I2C_CMD_STOP, I2C_CMD_WRITE, I2C_M_NOSTART, I2C_M_RD, I2C_M_TEN, I2C_STAT_ARBLOST, I2C_STAT_BUSY, I2C_STAT_NACK, I2C_STAT_TIP, KEMPLD_I2C_CMD, KEMPLD_I2C_DATA, KEMPLD_I2C_STAT, kempld_read8(), kempld_write8(), i2c_msg::len, kempld_i2c_data::msg, kempld_i2c_data::nmsgs, kempld_i2c_data::pos, i2c_msg::slave, kempld_i2c_data::state, STATE_ADDR, STATE_ADDR10, STATE_DONE, STATE_ERROR, STATE_INIT, STATE_READ, STATE_START, and STATE_WRITE.

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kempld_i2c_xfer()

static int kempld_i2c_xfer ( struct device *const  dev, const struct i2c_msg *const  msgs, const size_t  num  )

static

Definition at line 173 of file kempld_i2c.c.

Variable Documentation

kempld_i2c_bus_ops

const struct i2c_bus_operations kempld_i2c_bus_ops

static

Initial value:

= {
        .transfer = kempld_i2c_xfer,
}

Definition at line 173 of file kempld_i2c.c.

kempld_i2c_dev_ops

struct device_operations kempld_i2c_dev_ops

static

Initial value:

= {
        .scan_bus       = &scan_smbus,
        .ops_i2c_bus    = &kempld_i2c_bus_ops,
}

Definition at line 173 of file kempld_i2c.c.

Referenced by kempld_i2c_device_init().