/******************************************************************************
 *
 * Copyright(c) 2007 - 2011 Realtek Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 *
 ******************************************************************************/
#define _RTW_EEPROM_C_

#include <drv_conf.h>
#include <osdep_service.h>
#include <drv_types.h>

void up_clk(_adapter*	padapter,	 u16 *x)
{
_func_enter_;
	*x = *x | _EESK;
	rtw_write8(padapter, EE_9346CR, (u8)*x);
	rtw_udelay_os(CLOCK_RATE);

_func_exit_;

}

void down_clk(_adapter *	padapter, u16 *x	)
{
_func_enter_;
	*x = *x & ~_EESK;
	rtw_write8(padapter, EE_9346CR, (u8)*x);
	rtw_udelay_os(CLOCK_RATE);
_func_exit_;
}

void shift_out_bits(_adapter * padapter, u16 data, u16 count)
{
	u16 x,mask;
_func_enter_;

	if(padapter->bSurpriseRemoved==true){
		RT_TRACE(_module_rtl871x_eeprom_c_,_drv_err_,("padapter->bSurpriseRemoved==true"));
		goto out;
	}
	mask = 0x01 << (count - 1);
	x = rtw_read8(padapter, EE_9346CR);

	x &= ~(_EEDO | _EEDI);

	do
	{
		x &= ~_EEDI;
		if(data & mask)
			x |= _EEDI;
		if(padapter->bSurpriseRemoved==true){
		RT_TRACE(_module_rtl871x_eeprom_c_,_drv_err_,("padapter->bSurpriseRemoved==true"));
		goto out;
		}
		rtw_write8(padapter, EE_9346CR, (u8)x);
		rtw_udelay_os(CLOCK_RATE);
		up_clk(padapter, &x);
		down_clk(padapter, &x);
		mask = mask >> 1;
	} while(mask);
	if(padapter->bSurpriseRemoved==true){
		RT_TRACE(_module_rtl871x_eeprom_c_,_drv_err_,("padapter->bSurpriseRemoved==true"));
		goto out;
	}
	x &= ~_EEDI;
	rtw_write8(padapter, EE_9346CR, (u8)x);
out:
_func_exit_;
}

u16 shift_in_bits (_adapter * padapter)
{
	u16 x,d=0,i;
_func_enter_;
	if(padapter->bSurpriseRemoved==true){
		RT_TRACE(_module_rtl871x_eeprom_c_,_drv_err_,("padapter->bSurpriseRemoved==true"));
		goto out;
	}
	x = rtw_read8(padapter, EE_9346CR);

	x &= ~( _EEDO | _EEDI);
	d = 0;

	for(i=0; i<16; i++)
	{
		d = d << 1;
		up_clk(padapter, &x);
	if(padapter->bSurpriseRemoved==true){
		RT_TRACE(_module_rtl871x_eeprom_c_,_drv_err_,("padapter->bSurpriseRemoved==true"));
		goto out;
	}
		x = rtw_read8(padapter, EE_9346CR);

		x &= ~(_EEDI);
		if(x & _EEDO)
		d |= 1;

		down_clk(padapter, &x);
	}
out:
_func_exit_;

	return d;
}

void standby(_adapter *	padapter	)
{
	u8   x;
_func_enter_;
	x = rtw_read8(padapter, EE_9346CR);

	x &= ~(_EECS | _EESK);
	rtw_write8(padapter, EE_9346CR,x);

	rtw_udelay_os(CLOCK_RATE);
	x |= _EECS;
	rtw_write8(padapter, EE_9346CR, x);
	rtw_udelay_os(CLOCK_RATE);
_func_exit_;
}

u16 wait_eeprom_cmd_done(_adapter* padapter)
{
	u8	x;
	u16	i,res=false;
_func_enter_;
	standby(padapter );
	for (i=0; i<200; i++)
	{
		x = rtw_read8(padapter, EE_9346CR);
		if (x & _EEDO){
			res=true;
			goto exit;
			}
		rtw_udelay_os(CLOCK_RATE);
	}
exit:
_func_exit_;
	return res;
}

void eeprom_clean(_adapter * padapter)
{
	u16 x;
_func_enter_;
	if(padapter->bSurpriseRemoved==true){
		RT_TRACE(_module_rtl871x_eeprom_c_,_drv_err_,("padapter->bSurpriseRemoved==true"));
		goto out;
	}
	x = rtw_read8(padapter, EE_9346CR);
	if(padapter->bSurpriseRemoved==true){
		RT_TRACE(_module_rtl871x_eeprom_c_,_drv_err_,("padapter->bSurpriseRemoved==true"));
		goto out;
	}
	x &= ~(_EECS | _EEDI);
	rtw_write8(padapter, EE_9346CR, (u8)x);
	if(padapter->bSurpriseRemoved==true){
		RT_TRACE(_module_rtl871x_eeprom_c_,_drv_err_,("padapter->bSurpriseRemoved==true"));
		goto out;
	}
	up_clk(padapter, &x);
		if(padapter->bSurpriseRemoved==true){
		RT_TRACE(_module_rtl871x_eeprom_c_,_drv_err_,("padapter->bSurpriseRemoved==true"));
		goto out;
	}
	down_clk(padapter, &x);
out:
_func_exit_;
}

void eeprom_write16(_adapter * padapter, u16 reg, u16 data)
{
	u8 x;
_func_enter_;

	x = rtw_read8(padapter, EE_9346CR);

	x &= ~(_EEDI | _EEDO | _EESK | _EEM0);
	x |= _EEM1 | _EECS;
	rtw_write8(padapter, EE_9346CR, x);

	shift_out_bits(padapter, EEPROM_EWEN_OPCODE, 5);

	if(padapter->EepromAddressSize==8)	//CF+ and SDIO
		shift_out_bits(padapter, 0, 6);
	else									//USB
		shift_out_bits(padapter, 0, 4);

	standby( padapter);

// Commented out by rcnjko, 2004.0
//	// Erase this particular word.  Write the erase opcode and register
//	// number in that order. The opcode is 3bits in length; reg is 6 bits long.
//	shift_out_bits(Adapter, EEPROM_ERASE_OPCODE, 3);
//	shift_out_bits(Adapter, reg, Adapter->EepromAddressSize);
//
//	if (wait_eeprom_cmd_done(Adapter ) == FALSE)
//	{
//		return;
//	}


	standby(padapter );

	// write the new word to the EEPROM

	// send the write opcode the EEPORM
	shift_out_bits(padapter, EEPROM_WRITE_OPCODE, 3);

	// select which word in the EEPROM that we are writing to.
	shift_out_bits(padapter, reg, padapter->EepromAddressSize);

	// write the data to the selected EEPROM word.
	shift_out_bits(padapter, data, 16);

	if (wait_eeprom_cmd_done(padapter ) == false)
	{

		goto exit;
	}

	standby(padapter );

	shift_out_bits(padapter, EEPROM_EWDS_OPCODE, 5);
	shift_out_bits(padapter, reg, 4);

	eeprom_clean(padapter );
exit:
_func_exit_;
	return;
}

u16 eeprom_read16(_adapter * padapter, u16 reg) //ReadEEprom
{

	u16 x;
	u16 data=0;
_func_enter_;

	if(padapter->bSurpriseRemoved==true){
		RT_TRACE(_module_rtl871x_eeprom_c_,_drv_err_,("padapter->bSurpriseRemoved==true"));
		goto out;
	}
	// select EEPROM, reset bits, set _EECS
	x = rtw_read8(padapter, EE_9346CR);

	if(padapter->bSurpriseRemoved==true){
		RT_TRACE(_module_rtl871x_eeprom_c_,_drv_err_,("padapter->bSurpriseRemoved==true"));
		goto out;
	}

	x &= ~(_EEDI | _EEDO | _EESK | _EEM0);
	x |= _EEM1 | _EECS;
	rtw_write8(padapter, EE_9346CR, (unsigned char)x);

	// write the read opcode and register number in that order
	// The opcode is 3bits in length, reg is 6 bits long
	shift_out_bits(padapter, EEPROM_READ_OPCODE, 3);
	shift_out_bits(padapter, reg, padapter->EepromAddressSize);

	// Now read the data (16 bits) in from the selected EEPROM word
	data = shift_in_bits(padapter);

	eeprom_clean(padapter);
out:
_func_exit_;
	return data;
}




//From even offset
void eeprom_read_sz(_adapter * padapter, u16 reg, u8* data, u32 sz)
{

	u16 x, data16;
	u32 i;
_func_enter_;
	if(padapter->bSurpriseRemoved==true){
		RT_TRACE(_module_rtl871x_eeprom_c_,_drv_err_,("padapter->bSurpriseRemoved==true"));
		goto out;
	}
	// select EEPROM, reset bits, set _EECS
	x = rtw_read8(padapter, EE_9346CR);

	if(padapter->bSurpriseRemoved==true){
		RT_TRACE(_module_rtl871x_eeprom_c_,_drv_err_,("padapter->bSurpriseRemoved==true"));
		goto out;
	}

	x &= ~(_EEDI | _EEDO | _EESK | _EEM0);
	x |= _EEM1 | _EECS;
	rtw_write8(padapter, EE_9346CR, (unsigned char)x);

	// write the read opcode and register number in that order
	// The opcode is 3bits in length, reg is 6 bits long
	shift_out_bits(padapter, EEPROM_READ_OPCODE, 3);
	shift_out_bits(padapter, reg, padapter->EepromAddressSize);


	for(i=0; i<sz; i+=2)
	{
		data16 = shift_in_bits(padapter);
		data[i] = data16 & 0xff;
		data[i+1] = data16 >>8;
	}

	eeprom_clean(padapter);
out:
_func_exit_;



}


//addr_off : address offset of the entry in eeprom (not the tuple number of eeprom (reg); that is addr_off !=reg)
u8 eeprom_read(_adapter * padapter, u32 addr_off, u8 sz, u8* rbuf)
{
	u8 quotient, remainder, addr_2align_odd;
	u16 reg, stmp , i=0, idx = 0;
_func_enter_;
	reg = (u16)(addr_off >> 1);
	addr_2align_odd = (u8)(addr_off & 0x1);

	if(addr_2align_odd) //read that start at high part: e.g  1,3,5,7,9,...
	{
		stmp = eeprom_read16(padapter, reg);
		rbuf[idx++] = (u8) ((stmp>>8)&0xff); //return hogh-part of the short
		reg++; sz--;
	}

	quotient = sz >> 1;
	remainder = sz & 0x1;

	for( i=0 ; i < quotient; i++)
	{
		stmp = eeprom_read16(padapter, reg+i);
		rbuf[idx++] = (u8) (stmp&0xff);
		rbuf[idx++] = (u8) ((stmp>>8)&0xff);
	}

	reg = reg+i;
	if(remainder){ //end of read at lower part of short : 0,2,4,6,...
		stmp = eeprom_read16(padapter, reg);
		rbuf[idx] = (u8)(stmp & 0xff);
	}
_func_exit_;
	return true;
}



void read_eeprom_content(_adapter *	padapter)
{

_func_enter_;


_func_exit_;
}