| /* |
| ************************************************************************* |
| * 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); |
| } |
| |