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linux/drivers/net/wireless/ath9k/phy.c
Luis R. Rodriguez f078f20970 ath9k: Add new Atheros IEEE 802.11n driver 
This adds the new mac80211 11n ath9k Atheros driver. Only STA support
is currently enabled and tested.

Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Jack Howarth <howarth@bromo.msbb.uc.edu>
Signed-off-by: Jouni Malinen <jouni.malinen@atheros.com>
Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2008-08-07 09:49:42 -04:00

437 lines
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/*
* Copyright (c) 2008 Atheros Communications Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "core.h"
#include "hw.h"
#include "reg.h"
#include "phy.h"
void
ath9k_hw_write_regs(struct ath_hal *ah, u32 modesIndex, u32 freqIndex,
int regWrites)
{
struct ath_hal_5416 *ahp = AH5416(ah);
REG_WRITE_ARRAY(&ahp->ah_iniBB_RfGain, freqIndex, regWrites);
}
bool
ath9k_hw_set_channel(struct ath_hal *ah, struct ath9k_channel *chan)
{
u32 channelSel = 0;
u32 bModeSynth = 0;
u32 aModeRefSel = 0;
u32 reg32 = 0;
u16 freq;
struct chan_centers centers;
ath9k_hw_get_channel_centers(ah, chan, &centers);
freq = centers.synth_center;
if (freq < 4800) {
u32 txctl;
if (((freq - 2192) % 5) == 0) {
channelSel = ((freq - 672) * 2 - 3040) / 10;
bModeSynth = 0;
} else if (((freq - 2224) % 5) == 0) {
channelSel = ((freq - 704) * 2 - 3040) / 10;
bModeSynth = 1;
} else {
DPRINTF(ah->ah_sc, ATH_DBG_CHANNEL,
"%s: invalid channel %u MHz\n", __func__,
freq);
return false;
}
channelSel = (channelSel << 2) & 0xff;
channelSel = ath9k_hw_reverse_bits(channelSel, 8);
txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
if (freq == 2484) {
REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
} else {
REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
txctl & ~AR_PHY_CCK_TX_CTRL_JAPAN);
}
} else if ((freq % 20) == 0 && freq >= 5120) {
channelSel =
ath9k_hw_reverse_bits(((freq - 4800) / 20 << 2), 8);
aModeRefSel = ath9k_hw_reverse_bits(1, 2);
} else if ((freq % 10) == 0) {
channelSel =
ath9k_hw_reverse_bits(((freq - 4800) / 10 << 1), 8);
if (AR_SREV_9100(ah) || AR_SREV_9160_10_OR_LATER(ah))
aModeRefSel = ath9k_hw_reverse_bits(2, 2);
else
aModeRefSel = ath9k_hw_reverse_bits(1, 2);
} else if ((freq % 5) == 0) {
channelSel = ath9k_hw_reverse_bits((freq - 4800) / 5, 8);
aModeRefSel = ath9k_hw_reverse_bits(1, 2);
} else {
DPRINTF(ah->ah_sc, ATH_DBG_CHANNEL,
"%s: invalid channel %u MHz\n", __func__, freq);
return false;
}
reg32 =
(channelSel << 8) | (aModeRefSel << 2) | (bModeSynth << 1) |
(1 << 5) | 0x1;
REG_WRITE(ah, AR_PHY(0x37), reg32);
ah->ah_curchan = chan;
AH5416(ah)->ah_curchanRadIndex = -1;
return true;
}
bool
ath9k_hw_ar9280_set_channel(struct ath_hal *ah,
struct ath9k_channel *chan)
{
u16 bMode, fracMode, aModeRefSel = 0;
u32 freq, ndiv, channelSel = 0, channelFrac = 0, reg32 = 0;
struct chan_centers centers;
u32 refDivA = 24;
ath9k_hw_get_channel_centers(ah, chan, &centers);
freq = centers.synth_center;
reg32 = REG_READ(ah, AR_PHY_SYNTH_CONTROL);
reg32 &= 0xc0000000;
if (freq < 4800) {
u32 txctl;
bMode = 1;
fracMode = 1;
aModeRefSel = 0;
channelSel = (freq * 0x10000) / 15;
txctl = REG_READ(ah, AR_PHY_CCK_TX_CTRL);
if (freq == 2484) {
REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
} else {
REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
txctl & ~AR_PHY_CCK_TX_CTRL_JAPAN);
}
} else {
bMode = 0;
fracMode = 0;
if ((freq % 20) == 0) {
aModeRefSel = 3;
} else if ((freq % 10) == 0) {
aModeRefSel = 2;
} else {
aModeRefSel = 0;
fracMode = 1;
refDivA = 1;
channelSel = (freq * 0x8000) / 15;
REG_RMW_FIELD(ah, AR_AN_SYNTH9,
AR_AN_SYNTH9_REFDIVA, refDivA);
}
if (!fracMode) {
ndiv = (freq * (refDivA >> aModeRefSel)) / 60;
channelSel = ndiv & 0x1ff;
channelFrac = (ndiv & 0xfffffe00) * 2;
channelSel = (channelSel << 17) | channelFrac;
}
}
reg32 = reg32 |
(bMode << 29) |
(fracMode << 28) | (aModeRefSel << 26) | (channelSel);
REG_WRITE(ah, AR_PHY_SYNTH_CONTROL, reg32);
ah->ah_curchan = chan;
AH5416(ah)->ah_curchanRadIndex = -1;
return true;
}
static void
ath9k_phy_modify_rx_buffer(u32 *rfBuf, u32 reg32,
u32 numBits, u32 firstBit,
u32 column)
{
u32 tmp32, mask, arrayEntry, lastBit;
int32_t bitPosition, bitsLeft;
tmp32 = ath9k_hw_reverse_bits(reg32, numBits);
arrayEntry = (firstBit - 1) / 8;
bitPosition = (firstBit - 1) % 8;
bitsLeft = numBits;
while (bitsLeft > 0) {
lastBit = (bitPosition + bitsLeft > 8) ?
8 : bitPosition + bitsLeft;
mask = (((1 << lastBit) - 1) ^ ((1 << bitPosition) - 1)) <<
(column * 8);
rfBuf[arrayEntry] &= ~mask;
rfBuf[arrayEntry] |= ((tmp32 << bitPosition) <<
(column * 8)) & mask;
bitsLeft -= 8 - bitPosition;
tmp32 = tmp32 >> (8 - bitPosition);
bitPosition = 0;
arrayEntry++;
}
}
bool
ath9k_hw_set_rf_regs(struct ath_hal *ah, struct ath9k_channel *chan,
u16 modesIndex)
{
struct ath_hal_5416 *ahp = AH5416(ah);
u32 eepMinorRev;
u32 ob5GHz = 0, db5GHz = 0;
u32 ob2GHz = 0, db2GHz = 0;
int regWrites = 0;
if (AR_SREV_9280_10_OR_LATER(ah))
return true;
eepMinorRev = ath9k_hw_get_eeprom(ahp, EEP_MINOR_REV);
RF_BANK_SETUP(ahp->ah_analogBank0Data, &ahp->ah_iniBank0, 1);
RF_BANK_SETUP(ahp->ah_analogBank1Data, &ahp->ah_iniBank1, 1);
RF_BANK_SETUP(ahp->ah_analogBank2Data, &ahp->ah_iniBank2, 1);
RF_BANK_SETUP(ahp->ah_analogBank3Data, &ahp->ah_iniBank3,
modesIndex);
{
int i;
for (i = 0; i < ahp->ah_iniBank6TPC.ia_rows; i++) {
ahp->ah_analogBank6Data[i] =
INI_RA(&ahp->ah_iniBank6TPC, i, modesIndex);
}
}
if (eepMinorRev >= 2) {
if (IS_CHAN_2GHZ(chan)) {
ob2GHz = ath9k_hw_get_eeprom(ahp, EEP_OB_2);
db2GHz = ath9k_hw_get_eeprom(ahp, EEP_DB_2);
ath9k_phy_modify_rx_buffer(ahp->ah_analogBank6Data,
ob2GHz, 3, 197, 0);
ath9k_phy_modify_rx_buffer(ahp->ah_analogBank6Data,
db2GHz, 3, 194, 0);
} else {
ob5GHz = ath9k_hw_get_eeprom(ahp, EEP_OB_5);
db5GHz = ath9k_hw_get_eeprom(ahp, EEP_DB_5);
ath9k_phy_modify_rx_buffer(ahp->ah_analogBank6Data,
ob5GHz, 3, 203, 0);
ath9k_phy_modify_rx_buffer(ahp->ah_analogBank6Data,
db5GHz, 3, 200, 0);
}
}
RF_BANK_SETUP(ahp->ah_analogBank7Data, &ahp->ah_iniBank7, 1);
REG_WRITE_RF_ARRAY(&ahp->ah_iniBank0, ahp->ah_analogBank0Data,
regWrites);
REG_WRITE_RF_ARRAY(&ahp->ah_iniBank1, ahp->ah_analogBank1Data,
regWrites);
REG_WRITE_RF_ARRAY(&ahp->ah_iniBank2, ahp->ah_analogBank2Data,
regWrites);
REG_WRITE_RF_ARRAY(&ahp->ah_iniBank3, ahp->ah_analogBank3Data,
regWrites);
REG_WRITE_RF_ARRAY(&ahp->ah_iniBank6TPC, ahp->ah_analogBank6Data,
regWrites);
REG_WRITE_RF_ARRAY(&ahp->ah_iniBank7, ahp->ah_analogBank7Data,
regWrites);
return true;
}
void
ath9k_hw_rfdetach(struct ath_hal *ah)
{
struct ath_hal_5416 *ahp = AH5416(ah);
if (ahp->ah_analogBank0Data != NULL) {
kfree(ahp->ah_analogBank0Data);
ahp->ah_analogBank0Data = NULL;
}
if (ahp->ah_analogBank1Data != NULL) {
kfree(ahp->ah_analogBank1Data);
ahp->ah_analogBank1Data = NULL;
}
if (ahp->ah_analogBank2Data != NULL) {
kfree(ahp->ah_analogBank2Data);
ahp->ah_analogBank2Data = NULL;
}
if (ahp->ah_analogBank3Data != NULL) {
kfree(ahp->ah_analogBank3Data);
ahp->ah_analogBank3Data = NULL;
}
if (ahp->ah_analogBank6Data != NULL) {
kfree(ahp->ah_analogBank6Data);
ahp->ah_analogBank6Data = NULL;
}
if (ahp->ah_analogBank6TPCData != NULL) {
kfree(ahp->ah_analogBank6TPCData);
ahp->ah_analogBank6TPCData = NULL;
}
if (ahp->ah_analogBank7Data != NULL) {
kfree(ahp->ah_analogBank7Data);
ahp->ah_analogBank7Data = NULL;
}
if (ahp->ah_addac5416_21 != NULL) {
kfree(ahp->ah_addac5416_21);
ahp->ah_addac5416_21 = NULL;
}
if (ahp->ah_bank6Temp != NULL) {
kfree(ahp->ah_bank6Temp);
ahp->ah_bank6Temp = NULL;
}
}
bool ath9k_hw_init_rf(struct ath_hal *ah, int *status)
{
struct ath_hal_5416 *ahp = AH5416(ah);
if (!AR_SREV_9280_10_OR_LATER(ah)) {
ahp->ah_analogBank0Data =
kzalloc((sizeof(u32) *
ahp->ah_iniBank0.ia_rows), GFP_KERNEL);
ahp->ah_analogBank1Data =
kzalloc((sizeof(u32) *
ahp->ah_iniBank1.ia_rows), GFP_KERNEL);
ahp->ah_analogBank2Data =
kzalloc((sizeof(u32) *
ahp->ah_iniBank2.ia_rows), GFP_KERNEL);
ahp->ah_analogBank3Data =
kzalloc((sizeof(u32) *
ahp->ah_iniBank3.ia_rows), GFP_KERNEL);
ahp->ah_analogBank6Data =
kzalloc((sizeof(u32) *
ahp->ah_iniBank6.ia_rows), GFP_KERNEL);
ahp->ah_analogBank6TPCData =
kzalloc((sizeof(u32) *
ahp->ah_iniBank6TPC.ia_rows), GFP_KERNEL);
ahp->ah_analogBank7Data =
kzalloc((sizeof(u32) *
ahp->ah_iniBank7.ia_rows), GFP_KERNEL);
if (ahp->ah_analogBank0Data == NULL
|| ahp->ah_analogBank1Data == NULL
|| ahp->ah_analogBank2Data == NULL
|| ahp->ah_analogBank3Data == NULL
|| ahp->ah_analogBank6Data == NULL
|| ahp->ah_analogBank6TPCData == NULL
|| ahp->ah_analogBank7Data == NULL) {
DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
"%s: cannot allocate RF banks\n",
__func__);
*status = -ENOMEM;
return false;
}
ahp->ah_addac5416_21 =
kzalloc((sizeof(u32) *
ahp->ah_iniAddac.ia_rows *
ahp->ah_iniAddac.ia_columns), GFP_KERNEL);
if (ahp->ah_addac5416_21 == NULL) {
DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
"%s: cannot allocate ah_addac5416_21\n",
__func__);
*status = -ENOMEM;
return false;
}
ahp->ah_bank6Temp =
kzalloc((sizeof(u32) *
ahp->ah_iniBank6.ia_rows), GFP_KERNEL);
if (ahp->ah_bank6Temp == NULL) {
DPRINTF(ah->ah_sc, ATH_DBG_FATAL,
"%s: cannot allocate ah_bank6Temp\n",
__func__);
*status = -ENOMEM;
return false;
}
}
return true;
}
void
ath9k_hw_decrease_chain_power(struct ath_hal *ah, struct ath9k_channel *chan)
{
int i, regWrites = 0;
struct ath_hal_5416 *ahp = AH5416(ah);
u32 bank6SelMask;
u32 *bank6Temp = ahp->ah_bank6Temp;
switch (ahp->ah_diversityControl) {
case ATH9K_ANT_FIXED_A:
bank6SelMask =
(ahp->
ah_antennaSwitchSwap & ANTSWAP_AB) ? REDUCE_CHAIN_0 :
REDUCE_CHAIN_1;
break;
case ATH9K_ANT_FIXED_B:
bank6SelMask =
(ahp->
ah_antennaSwitchSwap & ANTSWAP_AB) ? REDUCE_CHAIN_1 :
REDUCE_CHAIN_0;
break;
case ATH9K_ANT_VARIABLE:
return;
break;
default:
return;
break;
}
for (i = 0; i < ahp->ah_iniBank6.ia_rows; i++)
bank6Temp[i] = ahp->ah_analogBank6Data[i];
REG_WRITE(ah, AR_PHY_BASE + 0xD8, bank6SelMask);
ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 189, 0);
ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 190, 0);
ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 191, 0);
ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 192, 0);
ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 193, 0);
ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 222, 0);
ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 245, 0);
ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 246, 0);
ath9k_phy_modify_rx_buffer(bank6Temp, 1, 1, 247, 0);
REG_WRITE_RF_ARRAY(&ahp->ah_iniBank6, bank6Temp, regWrites);
REG_WRITE(ah, AR_PHY_BASE + 0xD8, 0x00000053);
#ifdef ALTER_SWITCH
REG_WRITE(ah, PHY_SWITCH_CHAIN_0,
(REG_READ(ah, PHY_SWITCH_CHAIN_0) & ~0x38)
| ((REG_READ(ah, PHY_SWITCH_CHAIN_0) >> 3) & 0x38));
#endif
}
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