diff options
Diffstat (limited to 'drivers/staging/rt2860/common/ee_prom.c')
| -rw-r--r-- | drivers/staging/rt2860/common/ee_prom.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/drivers/staging/rt2860/common/ee_prom.c b/drivers/staging/rt2860/common/ee_prom.c new file mode 100644 index 000000000000..2083740a844b --- /dev/null +++ b/drivers/staging/rt2860/common/ee_prom.c @@ -0,0 +1,197 @@ +/* + ************************************************************************* + * 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: + ee_prom.c + + Abstract: + Miniport generic portion header file + + Revision History: + Who When What + -------- ---------- ---------------------------------------------- +*/ + +#include "../rt_config.h" + +/* IRQL = PASSIVE_LEVEL */ +static inline void RaiseClock(struct rt_rtmp_adapter *pAd, u32 * x) +{ + *x = *x | EESK; + RTMP_IO_WRITE32(pAd, E2PROM_CSR, *x); + RTMPusecDelay(1); /* Max frequency = 1MHz in Spec. definition */ +} + +/* IRQL = PASSIVE_LEVEL */ +static inline void LowerClock(struct rt_rtmp_adapter *pAd, u32 * x) +{ + *x = *x & ~EESK; + RTMP_IO_WRITE32(pAd, E2PROM_CSR, *x); + RTMPusecDelay(1); +} + +/* IRQL = PASSIVE_LEVEL */ +static inline u16 ShiftInBits(struct rt_rtmp_adapter *pAd) +{ + u32 x, i; + u16 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); + LowerClock(pAd, &x); /*prevent read failed */ + + x &= ~(EEDI); + if (x & EEDO) + data |= 1; + } + + return data; +} + +/* IRQL = PASSIVE_LEVEL */ +static inline void ShiftOutBits(struct rt_rtmp_adapter *pAd, + u16 data, u16 count) +{ + u32 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 */ +static inline void EEpromCleanup(struct rt_rtmp_adapter *pAd) +{ + u32 x; + + RTMP_IO_READ32(pAd, E2PROM_CSR, &x); + + x &= ~(EECS | EEDI); + RTMP_IO_WRITE32(pAd, E2PROM_CSR, x); + + RaiseClock(pAd, &x); + LowerClock(pAd, &x); +} + +static inline void EWEN(struct rt_rtmp_adapter *pAd) +{ + u32 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); +} + +static inline void EWDS(struct rt_rtmp_adapter *pAd) +{ + u32 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 */ +int rtmp_ee_prom_read16(struct rt_rtmp_adapter *pAd, + u16 Offset, u16 * pValue) +{ + u32 x; + u16 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); + + /* patch can not access e-Fuse issue */ + if (!(IS_RT3090(pAd) || IS_RT3572(pAd) || IS_RT3390(pAd))) { + /* 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); + + *pValue = data; + + return NDIS_STATUS_SUCCESS; +} |