Help required i2c-mpc driver

[Akash Bhatnagar]

Hi,
            I am working on implementation of I2C driver for both MPC8540(A) & MPC8560(B) in Master Mode scenarios. The problem I am facing is given below

If I read any buffer part via I2C bus from A to B continuously,the driver is working fine. However during this processing ,if B tries to read any buffer register from A the bus will goes into low state (both SCL and SDA are low).The error that it was showing are mainly NO ACK  and Remote IO errors. After this I suspect that it may be the problem form slave receive function that I implemented. The reference Manual says that you have to set I2CCR[TXAK] bit after slave receive finishes. But how does slave knows wether this will last byte of transaction.Only Master have this knowledge. The slave implementation is as follows:-

#ifdef CONFIG_MPC_I2C_SLAVE

                        // lost arbitration?
                        if ((priv->read(&priv->regs->i2csr) & MPC_I2CSR_MAL))
                        {

                                    priv->write(&priv->regs->i2csr, 0, MPC_I2CSR_MAL);
                                    if ((priv->read(&priv->regs->i2csr) & MPC_I2CSR_MAAS))
                                    {
                                                mpc_slave_address_match(priv);
                                    }
                        }
                        else
                        {
                                    if ((priv->read(&priv->regs->i2csr) & MPC_I2CSR_MAAS))
                                    {
                                                mpc_slave_address_match(priv);
                                    }
                                    else if ((priv->read(&priv->regs->i2ccr) & MPC_I2CCR_MTX))
                                    {
                                                mpc_slave_tx(priv);
                                    }
                                    else
                                    {
                                                mpc_slave_rx(priv);
                                    }
                        }
#endif
            }

static inline void mpc_slave_rx(struct mpc_i2c_private *priv)
{
            buffer = priv->read(&priv->regs->i2cdr);

            -------------Some Montavista Event Broker Part-----------

}

Since I am new in I2C functionality, Please point out any mistake I was doing.

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