diff options
Diffstat (limited to 'drivers/staging/rt2860/common/eeprom.c')
| -rw-r--r-- | drivers/staging/rt2860/common/eeprom.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/drivers/staging/rt2860/common/eeprom.c b/drivers/staging/rt2860/common/eeprom.c new file mode 100644 index 000000000000..bed2d666629c --- /dev/null +++ b/drivers/staging/rt2860/common/eeprom.c @@ -0,0 +1,244 @@ +/* + ************************************************************************* + * 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" + +// 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); +} + |