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/*
*************************************************************************
* Ralink Tech Inc.
* 5F., No.36, Taiyuan St., Jhubei City,
* Hsinchu County 302,
* Taiwan, R.O.C.
*
* (c) Copyright 2002-2007, Ralink Technology, Inc.
*
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
* *
*************************************************************************
Module Name:
eeprom.c
Abstract:
Revision History:
Who When What
-------- ---------- ----------------------------------------------
Name Date Modification logs
*/
#include "../rt_config.h"
#if 0
#define EEPROM_SIZE 0x200
#define NVRAM_OFFSET 0x30000
#define RF_OFFSET 0x40000
static UCHAR init_flag = 0;
static PUCHAR nv_ee_start = 0;
static UCHAR EeBuffer[EEPROM_SIZE];
#endif
// IRQL = PASSIVE_LEVEL
VOID RaiseClock(
IN PRTMP_ADAPTER pAd,
IN UINT32 *x)
{
*x = *x | EESK;
RTMP_IO_WRITE32(pAd, E2PROM_CSR, *x);
RTMPusecDelay(1); // Max frequency = 1MHz in Spec. definition
}
// IRQL = PASSIVE_LEVEL
VOID LowerClock(
IN PRTMP_ADAPTER pAd,
IN UINT32 *x)
{
*x = *x & ~EESK;
RTMP_IO_WRITE32(pAd, E2PROM_CSR, *x);
RTMPusecDelay(1);
}
// IRQL = PASSIVE_LEVEL
USHORT ShiftInBits(
IN PRTMP_ADAPTER pAd)
{
UINT32 x,i;
USHORT data=0;
RTMP_IO_READ32(pAd, E2PROM_CSR, &x);
x &= ~( EEDO | EEDI);
for(i=0; i<16; i++)
{
data = data << 1;
RaiseClock(pAd, &x);
RTMP_IO_READ32(pAd, E2PROM_CSR, &x);
x &= ~(EEDI);
if(x & EEDO)
data |= 1;
LowerClock(pAd, &x);
}
return data;
}
// IRQL = PASSIVE_LEVEL
VOID ShiftOutBits(
IN PRTMP_ADAPTER pAd,
IN USHORT data,
IN USHORT count)
{
UINT32 x,mask;
mask = 0x01 << (count - 1);
RTMP_IO_READ32(pAd, E2PROM_CSR, &x);
x &= ~(EEDO | EEDI);
do
{
x &= ~EEDI;
if(data & mask) x |= EEDI;
RTMP_IO_WRITE32(pAd, E2PROM_CSR, x);
RaiseClock(pAd, &x);
LowerClock(pAd, &x);
mask = mask >> 1;
} while(mask);
x &= ~EEDI;
RTMP_IO_WRITE32(pAd, E2PROM_CSR, x);
}
// IRQL = PASSIVE_LEVEL
VOID EEpromCleanup(
IN PRTMP_ADAPTER pAd)
{
UINT32 x;
RTMP_IO_READ32(pAd, E2PROM_CSR, &x);
x &= ~(EECS | EEDI);
RTMP_IO_WRITE32(pAd, E2PROM_CSR, x);
RaiseClock(pAd, &x);
LowerClock(pAd, &x);
}
VOID EWEN(
IN PRTMP_ADAPTER pAd)
{
UINT32 x;
// reset bits and set EECS
RTMP_IO_READ32(pAd, E2PROM_CSR, &x);
x &= ~(EEDI | EEDO | EESK);
x |= EECS;
RTMP_IO_WRITE32(pAd, E2PROM_CSR, x);
// kick a pulse
RaiseClock(pAd, &x);
LowerClock(pAd, &x);
// output the read_opcode and six pulse in that order
ShiftOutBits(pAd, EEPROM_EWEN_OPCODE, 5);
ShiftOutBits(pAd, 0, 6);
EEpromCleanup(pAd);
}
VOID EWDS(
IN PRTMP_ADAPTER pAd)
{
UINT32 x;
// reset bits and set EECS
RTMP_IO_READ32(pAd, E2PROM_CSR, &x);
x &= ~(EEDI | EEDO | EESK);
x |= EECS;
RTMP_IO_WRITE32(pAd, E2PROM_CSR, x);
// kick a pulse
RaiseClock(pAd, &x);
LowerClock(pAd, &x);
// output the read_opcode and six pulse in that order
ShiftOutBits(pAd, EEPROM_EWDS_OPCODE, 5);
ShiftOutBits(pAd, 0, 6);
EEpromCleanup(pAd);
}
// IRQL = PASSIVE_LEVEL
USHORT RTMP_EEPROM_READ16(
IN PRTMP_ADAPTER pAd,
IN USHORT Offset)
{
UINT32 x;
USHORT data;
Offset /= 2;
// reset bits and set EECS
RTMP_IO_READ32(pAd, E2PROM_CSR, &x);
x &= ~(EEDI | EEDO | EESK);
x |= EECS;
RTMP_IO_WRITE32(pAd, E2PROM_CSR, x);
// kick a pulse
RaiseClock(pAd, &x);
LowerClock(pAd, &x);
// output the read_opcode and register number in that order
ShiftOutBits(pAd, EEPROM_READ_OPCODE, 3);
ShiftOutBits(pAd, Offset, pAd->EEPROMAddressNum);
// Now read the data (16 bits) in from the selected EEPROM word
data = ShiftInBits(pAd);
EEpromCleanup(pAd);
return data;
} //ReadEEprom
VOID RTMP_EEPROM_WRITE16(
IN PRTMP_ADAPTER pAd,
IN USHORT Offset,
IN USHORT Data)
{
UINT32 x;
Offset /= 2;
EWEN(pAd);
// reset bits and set EECS
RTMP_IO_READ32(pAd, E2PROM_CSR, &x);
x &= ~(EEDI | EEDO | EESK);
x |= EECS;
RTMP_IO_WRITE32(pAd, E2PROM_CSR, x);
// kick a pulse
RaiseClock(pAd, &x);
LowerClock(pAd, &x);
// output the read_opcode ,register number and data in that order
ShiftOutBits(pAd, EEPROM_WRITE_OPCODE, 3);
ShiftOutBits(pAd, Offset, pAd->EEPROMAddressNum);
ShiftOutBits(pAd, Data, 16); // 16-bit access
// read DO status
RTMP_IO_READ32(pAd, E2PROM_CSR, &x);
EEpromCleanup(pAd);
RTMPusecDelay(10000); //delay for twp(MAX)=10ms
EWDS(pAd);
EEpromCleanup(pAd);
}
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