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|
/******************************************************************************
** File Name: I2C_drv.c *
** Author: liuhao *
** DATE: 06/28/2010 *
** Copyright: 2010 Spreatrum, Incoporated. All Rights Reserved. *
** Description: This file define the hal layer of I2C device. *
******************************************************************************
******************************************************************************
** Edit History *
** ------------------------------------------------------------------------- *
** DATE NAME DESCRIPTION *
** 06/28/2010 liuhao Create. *
******************************************************************************/
/**---------------------------------------------------------------------------*
** Dependencies *
**---------------------------------------------------------------------------*/
#include "asm/arch/sci_types.h"
//#include "os_api.h"
//#include "chip_plf_export.h"
#include "sp8830_i2c.h"
#include "sc8830_i2c_cfg.h"
/**---------------------------------------------------------------------------*
** Debugging Flag *
**---------------------------------------------------------------------------*/
/**---------------------------------------------------------------------------*
** Compiler Flag *
**---------------------------------------------------------------------------*/
#ifdef __cplusplus
extern "C"
{
#endif
/**---------------------------------------------------------------------------*
** Macro Define
**---------------------------------------------------------------------------*/
typedef struct
{
//SCI_MUTEX_PTR mutex;
uint32 current_port;
uint32 current_freq;
uint32 reference;
I2C_PHY_FUN *phy_fun;
} I2C_BUS;
/*
#define I2C_GetMutex(mutex) {\
uint32 ret = SCI_SUCCESS;\
if( NULL == mutex )\
{\
return ERR_I2C_NO_MUTEX;\
}\
if(SCI_InThreadContext())\
{\
ret = SCI_GetMutex(mutex, SCI_INVALID_BLOCK_ID != SCI_IdentifyThread() ? SCI_WAIT_FOREVER : 0);\
}\
SCI_ASSERT( ret == SCI_SUCCESS );//assert verified\
}
#define I2C_PutMutex(mutex) {\
uint32 ret = SCI_SUCCESS;\
if( NULL == mutex )\
{\
return ERR_I2C_NO_MUTEX;\
}\
if(SCI_InThreadContext())\
{\
ret = SCI_PutMutex( mutex );\
}\
SCI_ASSERT( ret == SCI_SUCCESS );//assert verified\
}
*/
/**---------------------------------------------------------------------------*
** Local Variables
**---------------------------------------------------------------------------*/
LOCAL I2C_DEV __i2c_dev[I2C_BUS_MAX *I2C_DEV_MAX];
/**---------------------------------------------------------------------------*
** Global Variables
**---------------------------------------------------------------------------*/
I2C_BUS __i2c_bus[I2C_BUS_MAX];
extern const I2C_PHY_CFG __i2c_phy_cfg[I2C_ID_MAX];
/**---------------------------------------------------------------------------*
** Function Definitions
**---------------------------------------------------------------------------*/
/*********************************************************************************************************
** Function name:
** Descriptions:
** input parameters:
**
**
**
** output parameters:
** Returned value:
*********************************************************************************************************/
LOCAL uint32 I2C_Bus_CFG (uint32 logic_id)
{
uint32 bus_id = __i2c_phy_cfg[logic_id].phy_id;
/*config bus method*/
__i2c_bus[bus_id].phy_fun = __i2c_phy_cfg[logic_id].phy_fun;
return 0;
}
/*********************************************************************************************************
** Function name:
** Descriptions:
** input parameters:
**
**
**
** output parameters:
** Returned value:
*********************************************************************************************************/
LOCAL uint32 I2C_Bus_Init (uint32 logic_id, uint32 freq, uint32 port_id)
{
uint32 bus_id = __i2c_phy_cfg[logic_id].phy_id;
/*config bus property*/
__i2c_bus[bus_id].current_freq = freq;
__i2c_bus[bus_id].current_port = port_id;
//__i2c_bus[bus_id].mutex = SCI_CreateMutex ("I2C SYNC MUTEX", SCI_INHERIT);
//SCI_PASSERT ( (NULL!= __i2c_bus[bus_id].mutex), ("I2C Great MUTEX fail!"));/*assert verified*/
/*config bus method*/
I2C_Bus_CFG (logic_id);
return 0;
}
/*********************************************************************************************************
** Function name:
** Descriptions:
** input parameters:
**
**
**
** output parameters:
** Returned value:
*********************************************************************************************************/
LOCAL uint32 I2C_Bus_Exit (uint32 bus_id)
{
uint32 status_val = 0;
__i2c_bus[bus_id].reference = 0;
/*
if (NULL != __i2c_bus[bus_id].mutex)
{
status_val = SCI_DeleteMutex (__i2c_bus[bus_id].mutex);
//SCI_PASSERT((0 != status_val),("I2C delete MUTEX fail!"));
__i2c_bus[bus_id].mutex = NULL;
}
*/
/*release the bus method*/
__i2c_bus[bus_id].phy_fun = NULL;
return 0;
}
/*********************************************************************************************************
** Function name: I2C_HAL_Open
** Descriptions: i2c bus open function
** input parameters:
** dev - pointer of i2c slave dev
**
**
** output parameters: NONE
** Returned value: handle
*********************************************************************************************************/
PUBLIC int32 I2C_HAL_Open (I2C_DEV *dev)
{
uint32 handle;
uint32 bus_id;
uint32 port_id;
uint32 idx = 0;
int32 i =0;
//SCI_ASSERT (NULL != dev);/*assert verified*/
/*check if use the wrong port number*/
//SCI_ASSERT ( ( (I2C_ID_MAX > dev->id) && (0 <= dev->id)));/*assert verified*/
/*now we should get the i2c bus id and the controller's port id*/
bus_id = __i2c_phy_cfg[dev->id].phy_id;
port_id = __i2c_phy_cfg[dev->id].port_id;
/*reference shouldn't larger than I2C_DEV_MAX*/
//SCI_ASSERT ( ( (I2C_DEV_MAX > __i2c_bus[bus_id].reference) && (0 <= __i2c_bus[bus_id].reference)));/*assert verified*/
/*look for the handle: return the 1st available array member*/
for (i=0; i< I2C_DEV_MAX; i++)
{
if (0 == __i2c_dev[idx + bus_id * I2C_DEV_MAX].freq)
{
break;
}
idx++;
if (I2C_DEV_MAX == idx)
{
return -1;
}
}
/*caculate handle*/
handle = idx + bus_id * I2C_DEV_MAX;
/*set the parameters for i2c slave device*/
__i2c_dev[handle].id = dev->id;
__i2c_dev[handle].freq = dev->freq;
__i2c_dev[handle].bus = bus_id;
__i2c_dev[handle].slave_addr = dev->slave_addr;
__i2c_dev[handle].reg_addr_num = dev->reg_addr_num;
__i2c_dev[handle].check_ack = dev->check_ack;
__i2c_dev[handle].no_stop = dev->no_stop;
/*first open, than init i2c controller*/
if (0 == __i2c_bus[bus_id].reference)
{
I2C_Bus_Init (dev->id, dev->freq, port_id);
__i2c_bus[bus_id].phy_fun->init (bus_id, dev->freq, port_id);
}
__i2c_bus[bus_id].reference++;
return handle;
}
/*********************************************************************************************************
** Function name:
** Descriptions:
** input parameters:
**
**
**
** output parameters:
** Returned value:
*********************************************************************************************************/
PUBLIC int32 I2C_HAL_Close (uint32 handle)
{
uint32 bus_id;
/*handle shouldn't larger than I2C_BUS_MAX*I2C_DEV_MAX*/
//SCI_ASSERT ( ( (I2C_BUS_MAX * I2C_DEV_MAX > handle) && (0 <= handle)));/*assert verified*/
/*this handle is already closed*/
if (0 == __i2c_dev[handle].freq)
{
return -1;
}
bus_id = __i2c_dev[handle].bus;
if (1 == __i2c_bus[bus_id].reference)
{
I2C_Bus_Exit (bus_id);
}
else
{
__i2c_bus[bus_id].reference--;
}
/*release the handle*/
__i2c_dev[handle].id = 0;
__i2c_dev[handle].freq = 0;
__i2c_dev[handle].slave_addr = 0;
__i2c_dev[handle].reg_addr_num = 0;
__i2c_dev[handle].check_ack = 0;
__i2c_dev[handle].no_stop = 0;
return 0;
}
/*********************************************************************************************************
** Function name:
** Descriptions:
** input parameters:
**
**
**
** output parameters:
** Returned value:
*********************************************************************************************************/
PUBLIC uint32 I2C_HAL_Read (uint32 handle, uint8 *reg_addr, uint8 *buffer, uint32 bytes)
{
uint32 ret_val;
uint32 bus_id;
uint32 port_id;
uint32 err_code;
/*handle shouldn't larger than I2C_BUS_MAX*I2C_DEV_MAX*/
//SCI_ASSERT ( ( (I2C_BUS_MAX * I2C_DEV_MAX > handle) && (0 <= handle)));/*assert verified*/
//SCI_ASSERT (NULL != buffer);/*assert verified*/
//SCI_ASSERT (0 < bytes);/*assert verified*/
/*the handle has destroied*/
//SCI_ASSERT (0 != __i2c_dev[handle].freq);/*assert verified*/
bus_id = __i2c_dev[handle].bus;
port_id = __i2c_phy_cfg[__i2c_dev[handle].id].port_id;
/*get i2c bus*/
//I2C_GetMutex (__i2c_bus[bus_id].mutex);
/*set i2c controller*/
if ( (__i2c_bus[bus_id].current_freq != __i2c_dev[handle].freq) ||
(__i2c_bus[bus_id].current_port != port_id))
{
__i2c_bus[bus_id].phy_fun->init (bus_id, __i2c_dev[handle].freq, port_id);
__i2c_bus[bus_id].current_freq = __i2c_dev[handle].freq;
__i2c_bus[bus_id].current_port = port_id;
}
do
{
err_code = 0;
/*this is for combined format*/
if (0 < __i2c_dev[handle].reg_addr_num)
{
//SCI_ASSERT (NULL != reg_addr);/*assert verified*/
/*start i2c bus*/
ret_val = __i2c_bus[bus_id].phy_fun->start (bus_id, __i2c_dev[handle].slave_addr, 0, __i2c_dev[handle].check_ack);
if (ERR_I2C_NONE != ret_val)
{
break;
}
/*write i2c slave device's sub address*/
ret_val = __i2c_bus[bus_id].phy_fun->write (bus_id, reg_addr, __i2c_dev[handle].reg_addr_num, __i2c_dev[handle].check_ack, __i2c_dev[handle].no_stop);
if (ERR_I2C_NONE != ret_val)
{
break;
}
}
/*restart i2c bus*/
ret_val = __i2c_bus[bus_id].phy_fun->start (bus_id, __i2c_dev[handle].slave_addr, 1, __i2c_dev[handle].check_ack);
if (ERR_I2C_NONE != ret_val)
{
break;
}
/*read data and stop bus*/
ret_val = __i2c_bus[bus_id].phy_fun->read (bus_id, buffer, bytes, __i2c_dev[handle].check_ack);
if (ERR_I2C_NONE != ret_val)
{
break;
}
err_code = bytes;
}
while (0);
/*release i2c bus*/
//I2C_PutMutex (__i2c_bus[bus_id].mutex);
return err_code;
}
/*********************************************************************************************************
** Function name:
** Descriptions:
** input parameters:
**
**
**
** output parameters:
** Returned value:
*********************************************************************************************************/
PUBLIC uint32 I2C_HAL_Write (uint32 handle, uint8 *reg_addr, uint8 *buffer, uint32 bytes)
{
uint32 ret_val;
uint32 bus_id;
uint32 port_id;
uint32 err_code;
/*handle shouldn't larger than I2C_BUS_MAX*I2C_DEV_MAX*/
//SCI_ASSERT ( ( (I2C_BUS_MAX * I2C_DEV_MAX > handle) && (0 <= handle)));/*assert verified*/
//SCI_ASSERT (NULL != buffer);/*assert verified*/
//SCI_ASSERT (0 < bytes);/*assert verified*/
/*the handle has destroied*/
//SCI_ASSERT (0 != __i2c_dev[handle].freq);/*assert verified*/
bus_id = __i2c_dev[handle].bus;
port_id = __i2c_phy_cfg[__i2c_dev[handle].id].port_id;
/*get i2c bus*/
//I2C_GetMutex (__i2c_bus[bus_id].mutex);
/*set i2c controller*/
if ( (__i2c_bus[bus_id].current_freq != __i2c_dev[handle].freq) ||
(__i2c_bus[bus_id].current_port != port_id))
{
__i2c_bus[bus_id].phy_fun->init (bus_id, __i2c_dev[handle].freq, port_id);
__i2c_bus[bus_id].current_freq = __i2c_dev[handle].freq;
__i2c_bus[bus_id].current_port = port_id;
}
do
{
err_code = 0;
/*start i2c bus*/
ret_val = __i2c_bus[bus_id].phy_fun->start (bus_id, __i2c_dev[handle].slave_addr, 0, __i2c_dev[handle].check_ack);
if (ERR_I2C_NONE != ret_val)
{
break;
}
/*write i2c slave device's sub address*/
if (0 < __i2c_dev[handle].reg_addr_num)
{
//SCI_ASSERT (NULL != reg_addr);/*assert verified*/
ret_val = __i2c_bus[bus_id].phy_fun->write (bus_id, reg_addr, __i2c_dev[handle].reg_addr_num, __i2c_dev[handle].check_ack, 2);
if (ERR_I2C_NONE != ret_val)
{
break;
}
}
/*write i2c slave device's data and stop bus*/
ret_val = __i2c_bus[bus_id].phy_fun->write (bus_id, buffer, bytes, __i2c_dev[handle].check_ack, 0);
if (ERR_I2C_NONE != ret_val)
{
break;
}
err_code = bytes;
}
while (0);
/*release i2c bus*/
//I2C_PutMutex (__i2c_bus[bus_id].mutex);
return err_code;
}
/*********************************************************************************************************
** Function name:
** Descriptions:
** input parameters:
**
**
**
** output parameters:
** Returned value:
*********************************************************************************************************/
PUBLIC uint32 I2C_HAL_Ioctl (uint32 handle, uint32 cmd, uint32 *arg)
{
uint32 ret_val = 0;
uint32 bus_id;
/*handle shouldn't larger than I2C_BUS_MAX*I2C_DEV_MAX*/
//SCI_ASSERT ( ( (I2C_BUS_MAX * I2C_DEV_MAX > handle) && (0 <= handle)));/*assert verified*/
//SCI_ASSERT (NULL != arg);/*assert verified*/
bus_id = __i2c_dev[handle].bus;
switch (cmd)
{
case I2C_CTL_G_FREQ:
*arg = __i2c_dev[handle].freq;
break;
case I2C_CTL_S_FREQ:
__i2c_dev[handle].freq = *arg;
break;
case I2C_CTL_G_PORT:
*arg = __i2c_dev[handle].id;
break;
case I2C_CTL_S_PORT:
__i2c_dev[handle].id = *arg;
break;
case I2C_CTL_STOP_BUS:
/*get i2c bus*/
// I2C_GetMutex (__i2c_bus[bus_id].mutex);
ret_val = __i2c_bus[bus_id].phy_fun->stop (bus_id);
/*release i2c bus*/
// I2C_PutMutex (__i2c_bus[bus_id].mutex);
break;
default:
break;
}
return ret_val;
}
/**---------------------------------------------------------------------------*
** Compiler Flag *
**---------------------------------------------------------------------------*/
#ifdef __cplusplus
}
#endif
/* End Of File */
|
