nmi2c.c

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#include "common/include/nm_common.h"

#ifdef CONF_WINC_USE_I2C

#include "nmi2c.h"
#include "bus_wrapper/include/nm_bus_wrapper.h"


/*
*       @fn             nm_i2c_read_reg_with_ret
*       @brief  Read register with error code return
*       @param [in]     u32Addr
*                               Register address
*       @param [out]    pu32RetVal
*                               Pointer to u32 variable used to return the read value
*       @return M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
*       @author M. Abdelmawla
*       @date   11 July 2012
*       @version        1.0
*/
 sint8 nm_i2c_read_reg_with_ret(uint32 u32Addr, uint32* pu32RetVal)
{
        uint8 b[6];
        uint8 rsz;
        tstrNmI2cDefault strI2c;
        sint8 s8Ret = M2M_SUCCESS;

        if(u32Addr < 0xff) { /* clockless i2c */
                b[0] = 0x09;
                b[1] = (uint8)(u32Addr);
                rsz = 1;
                strI2c.u16Sz = 2;
        } else {
                b[0] = 0x80;
                b[1] = (uint8)(u32Addr >> 24);
                b[2] = (uint8)(u32Addr >> 16);
                b[3] = (uint8)(u32Addr >> 8);
                b[4] = (uint8)(u32Addr);
                b[5] = 0x04;
                rsz = 4;
                strI2c.u16Sz = 6;
        }

        strI2c.pu8Buf = b;

        if(M2M_SUCCESS == nm_bus_ioctl(NM_BUS_IOCTL_W, &strI2c))
        {
                strI2c.u16Sz = rsz;
                if(M2M_SUCCESS != nm_bus_ioctl(NM_BUS_IOCTL_R, &strI2c))
                {
                        //M2M_ERR("read error\n");
                        s8Ret = M2M_ERR_BUS_FAIL;
                }
        }
        else
        {
                M2M_ERR("failed to send cfg bytes\n");
                s8Ret = M2M_ERR_BUS_FAIL;
        }

        if (rsz == 1) {
                *pu32RetVal = b[0];
        } else {
                *pu32RetVal = b[0] | ((uint32)b[1] << 8) | ((uint32)b[2] << 16) | ((uint32)b[3] << 24);
        }
        return s8Ret;
}

/*
*       @fn             nm_i2c_read_reg
*       @brief  Read register
*       @param [in]     u32Addr
*                               Register address
*       @return Register value
*       @author M. Abdelmawla
*       @date   11 July 2012
*       @version        1.0
*/
uint32 nm_i2c_read_reg(uint32 u32Addr)
{
        uint32 val;
        nm_i2c_read_reg_with_ret(u32Addr, &val);
        return val;
}

/*
*       @fn             nm_i2c_write_reg
*       @brief  write register
*       @param [in]     u32Addr
*                               Register address
*       @param [in]     u32Val
*                               Value to be written to the register
*       @return M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
*       @author M. Abdelmawla
*       @date   11 July 2012
*       @version        1.0
*/
sint8 nm_i2c_write_reg(uint32 u32Addr, uint32 u32Val)
{
        tstrNmI2cDefault strI2c;
        uint8 b[16];
        sint8 s8Ret = M2M_SUCCESS;

        if(u32Addr < 0xff) { /* clockless i2c */
                b[0] = 0x19;
                b[1] = (uint8)(u32Addr);
                b[2] = (uint8)(u32Val);
                strI2c.u16Sz = 3;
        } else {
                b[0] = 0x90;
                b[1] = (uint8)(u32Addr >> 24);
                b[2] = (uint8)(u32Addr >> 16);
                b[3] = (uint8)(u32Addr >> 8);
                b[4] = (uint8)u32Addr;
                b[5] = 0x04;
                b[6] = (uint8)u32Val;
                b[7] = (uint8)(u32Val >> 8);
                b[8] = (uint8)(u32Val >> 16);
                b[9] = (uint8)(u32Val >> 24);
                strI2c.u16Sz = 10;
        }

        strI2c.pu8Buf = b;

        if(M2M_SUCCESS != nm_bus_ioctl(NM_BUS_IOCTL_W, &strI2c))
        {
                M2M_ERR("write error\n");
                s8Ret = M2M_ERR_BUS_FAIL;
        }

        return s8Ret;
}

/*
*       @fn             nm_i2c_read_block
*       @brief  Read block of data
*       @param [in]     u32Addr
*                               Start address
*       @param [out]    puBuf
*                               Pointer to a buffer used to return the read data
*       @param [in]     u16Sz
*                               Number of bytes to read. The buffer size must be >= u16Sz
*       @return M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
*       @author M. Abdelmawla
*       @date   11 July 2012
*       @version        1.0
*/
sint8 nm_i2c_read_block(uint32 u32Addr, uint8 *pu8Buf, uint16 u16Sz)
{
        tstrNmI2cDefault strI2c;
        uint8 au8Buf[7];
        sint8 s8Ret = M2M_SUCCESS;

        au8Buf[0] = 0x02;
        au8Buf[1] = (uint8)(u32Addr >> 24);
        au8Buf[2] = (uint8)(u32Addr >> 16);
        au8Buf[3] = (uint8)(u32Addr >> 8);
        au8Buf[4] = (uint8)(u32Addr >> 0);
        au8Buf[5] = (uint8)(u16Sz >> 8);
        au8Buf[6] = (uint8)(u16Sz);

        strI2c.pu8Buf = au8Buf;
        strI2c.u16Sz = sizeof(au8Buf);

        if(M2M_SUCCESS != nm_bus_ioctl(NM_BUS_IOCTL_W, &strI2c))
        {
                M2M_ERR("write error\n");
                s8Ret = M2M_ERR_BUS_FAIL;
        }
        else
        {
                strI2c.pu8Buf = pu8Buf;
                strI2c.u16Sz = u16Sz;

                if(M2M_SUCCESS != nm_bus_ioctl(NM_BUS_IOCTL_R, &strI2c))
                {
                        M2M_ERR("read error\n");
                        s8Ret = M2M_ERR_BUS_FAIL;
                }
        }

        return s8Ret;
}

/*
*       @fn             nm_i2c_write_block
*       @brief  Write block of data
*       @param [in]     u32Addr
*                               Start address
*       @param [in]     puBuf
*                               Pointer to the buffer holding the data to be written
*       @param [in]     u16Sz
*                               Number of bytes to write. The buffer size must be >= u16Sz
*       @return M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
*       @author M. Abdelmawla
*       @date   11 July 2012
*       @version        1.0
*/
sint8 nm_i2c_write_block(uint32 u32Addr, uint8 *pu8Buf, uint16 u16Sz)
{
        uint8 au8Buf[7];
        tstrNmI2cSpecial strI2c;
        sint8 s8Ret = M2M_SUCCESS;

        au8Buf[0] = 0x12;
        au8Buf[1] = (uint8)(u32Addr >> 24);
        au8Buf[2] = (uint8)(u32Addr >> 16);
        au8Buf[3] = (uint8)(u32Addr >> 8);
        au8Buf[4] = (uint8)(u32Addr);
        au8Buf[5] = (uint8)(u16Sz >> 8);
        au8Buf[6] = (uint8)(u16Sz);

        strI2c.pu8Buf1 = au8Buf;
        strI2c.pu8Buf2 = pu8Buf;
        strI2c.u16Sz1 = sizeof(au8Buf);
        strI2c.u16Sz2 = u16Sz;

        if(M2M_SUCCESS != nm_bus_ioctl(NM_BUS_IOCTL_W_SPECIAL, &strI2c))
        {
                M2M_ERR("write error\n");
                s8Ret = M2M_ERR_BUS_FAIL;
        }

        return s8Ret;
}

#endif
/* EOF */