2 * Copyright (c) 2008-2009 Sam Leffler, Errno Consulting
3 * Copyright (c) 2008 Atheros Communications, Inc.
5 * Permission to use, copy, modify, and/or distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 * NB: Merlin and later have a simpler RF backend.
25 #include "ah_internal.h"
27 #include "ah_eeprom_v14.h"
29 #include "ar9002/ar9280.h"
30 #include "ar5416/ar5416reg.h"
31 #include "ar5416/ar5416phy.h"
33 #define N(a) (sizeof(a)/sizeof(a[0]))
36 RF_HAL_FUNCS base; /* public state, must be first */
37 uint16_t pcdacTable[1]; /* XXX */
39 #define AR9280(ah) ((struct ar9280State *) AH5212(ah)->ah_rfHal)
41 static HAL_BOOL ar9280GetChannelMaxMinPower(struct ath_hal *,
42 const struct ieee80211_channel *, int16_t *maxPow,int16_t *minPow);
43 int16_t ar9280GetNfAdjust(struct ath_hal *ah, const HAL_CHANNEL_INTERNAL *c);
46 ar9280WriteRegs(struct ath_hal *ah, u_int modesIndex, u_int freqIndex,
49 (void) ath_hal_ini_write(ah, &AH5416(ah)->ah_ini_bb_rfgain,
54 * Take the MHz channel value and set the Channel value
56 * ASSUMES: Writes enabled to analog bus
61 * Channel Frequency = (3/4) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^17)
65 * Channel Frequency = (3/2) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^10)
66 * (freq_ref = 40MHz/(24>>amodeRefSel))
68 * For 5GHz channels which are 5MHz spaced,
69 * Channel Frequency = (3/2) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^17)
73 ar9280SetChannel(struct ath_hal *ah, const struct ieee80211_channel *chan)
75 uint16_t bMode, fracMode, aModeRefSel = 0;
76 uint32_t freq, ndiv, channelSel = 0, channelFrac = 0, reg32 = 0;
78 uint32_t refDivA = 24;
81 OS_MARK(ah, AH_MARK_SETCHANNEL, chan->ic_freq);
83 ar5416GetChannelCenters(ah, chan, ¢ers);
84 freq = centers.synth_center;
86 reg32 = OS_REG_READ(ah, AR_PHY_SYNTH_CONTROL);
89 if (ath_hal_eepromGet(ah, AR_EEP_FRAC_N_5G, &frac_n_5g) != HAL_OK)
92 if (freq < 4800) { /* 2 GHz, fractional mode */
98 channelSel = (freq * 0x10000)/15;
100 txctl = OS_REG_READ(ah, AR_PHY_CCK_TX_CTRL);
102 /* Enable channel spreading for channel 14 */
103 OS_REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
104 txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
106 OS_REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
107 txctl &~ AR_PHY_CCK_TX_CTRL_JAPAN);
116 * Enable fractional mode for half/quarter rate
119 * This is from the Linux ath9k code, rather than
120 * the Atheros HAL code.
122 if (IEEE80211_IS_CHAN_QUARTER(chan) ||
123 IEEE80211_IS_CHAN_HALF(chan))
125 else if ((freq % 20) == 0) {
127 } else if ((freq % 10) == 0) {
130 if (aModeRefSel) break;
134 /* Enable 2G (fractional) mode for channels which are 5MHz spaced */
137 * Workaround for talking on PSB non-5MHz channels;
138 * the pre-Merlin chips only had a 2.5MHz channel
139 * spacing so some channels aren't reachable.
142 * This interoperates on the quarter rate channels
143 * with the AR5112 and later RF synths. Please note
144 * that the synthesiser isn't able to completely
145 * accurately represent these frequencies (as the
146 * resolution in this reference is 2.5MHz) and thus
147 * it will be slightly "off centre." This matches
148 * the same slightly incorrect centre frequency
149 * behaviour that the AR5112 and later channel
150 * selection code has.
152 * This also interoperates with the AR5416
153 * synthesiser modification for programming
154 * fractional frequencies in 5GHz mode. However
155 * that modification is also disabled by default.
157 * This is disabled because it hasn't been tested for
158 * regulatory compliance and neither have the NICs
159 * which would use it. So if you enable this code,
160 * you must first ensure that you've re-certified the
161 * NICs in question beforehand or you will be
162 * violating your local regulatory rules and breaking
171 channelSel = (freq * 0x8000)/15;
174 /* Offset by 500KHz */
180 /* Calculate the "adjusted" frequency */
182 ch = (((f - 4800) * 10) / 25) + 1;
184 ch2 = ((ch * 25) / 5) + 9600;
185 channelSel = (ch2 * 0x4000) / 15;
187 // "%s: freq=%d, ch=%d, ch2=%d, "
188 // "channelSel=%d\n",
189 // __func__, freq, ch, ch2, channelSel);
193 /* RefDivA setting */
194 OS_A_REG_RMW_FIELD(ah, AR_AN_SYNTH9,
195 AR_AN_SYNTH9_REFDIVA, refDivA);
199 ndiv = (freq * (refDivA >> aModeRefSel))/60;
200 channelSel = ndiv & 0x1ff;
201 channelFrac = (ndiv & 0xfffffe00) * 2;
202 channelSel = (channelSel << 17) | channelFrac;
206 reg32 = reg32 | (bMode << 29) | (fracMode << 28) |
207 (aModeRefSel << 26) | (channelSel);
209 OS_REG_WRITE(ah, AR_PHY_SYNTH_CONTROL, reg32);
211 AH_PRIVATE(ah)->ah_curchan = chan;
217 * Return a reference to the requested RF Bank.
220 ar9280GetRfBank(struct ath_hal *ah, int bank)
222 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown RF Bank %d requested\n",
228 * Reads EEPROM header info from device structure and programs
232 ar9280SetRfRegs(struct ath_hal *ah, const struct ieee80211_channel *chan,
233 uint16_t modesIndex, uint16_t *rfXpdGain)
235 return AH_TRUE; /* nothing to do */
239 * Read the transmit power levels from the structures taken from EEPROM
240 * Interpolate read transmit power values for this channel
241 * Organize the transmit power values into a table for writing into the hardware
245 ar9280SetPowerTable(struct ath_hal *ah, int16_t *pPowerMin, int16_t *pPowerMax,
246 const struct ieee80211_channel *chan, uint16_t *rfXpdGain)
253 ar9280GetMinPower(struct ath_hal *ah, EXPN_DATA_PER_CHANNEL_5112 *data)
256 int16_t minGain,minPwr,minPcdac,retVal;
258 /* Assume NUM_POINTS_XPD0 > 0 */
259 minGain = data->pDataPerXPD[0].xpd_gain;
260 for (minIndex=0,i=1; i<NUM_XPD_PER_CHANNEL; i++) {
261 if (data->pDataPerXPD[i].xpd_gain < minGain) {
263 minGain = data->pDataPerXPD[i].xpd_gain;
266 minPwr = data->pDataPerXPD[minIndex].pwr_t4[0];
267 minPcdac = data->pDataPerXPD[minIndex].pcdac[0];
268 for (i=1; i<NUM_POINTS_XPD0; i++) {
269 if (data->pDataPerXPD[minIndex].pwr_t4[i] < minPwr) {
270 minPwr = data->pDataPerXPD[minIndex].pwr_t4[i];
271 minPcdac = data->pDataPerXPD[minIndex].pcdac[i];
274 retVal = minPwr - (minPcdac*2);
280 ar9280GetChannelMaxMinPower(struct ath_hal *ah,
281 const struct ieee80211_channel *chan,
282 int16_t *maxPow, int16_t *minPow)
285 struct ath_hal_5212 *ahp = AH5212(ah);
286 int numChannels=0,i,last;
287 int totalD, totalF,totalMin;
288 EXPN_DATA_PER_CHANNEL_5112 *data=AH_NULL;
289 EEPROM_POWER_EXPN_5112 *powerArray=AH_NULL;
292 if (IS_CHAN_A(chan)) {
293 powerArray = ahp->ah_modePowerArray5112;
294 data = powerArray[headerInfo11A].pDataPerChannel;
295 numChannels = powerArray[headerInfo11A].numChannels;
296 } else if (IS_CHAN_G(chan) || IS_CHAN_108G(chan)) {
297 /* XXX - is this correct? Should we also use the same power for turbo G? */
298 powerArray = ahp->ah_modePowerArray5112;
299 data = powerArray[headerInfo11G].pDataPerChannel;
300 numChannels = powerArray[headerInfo11G].numChannels;
301 } else if (IS_CHAN_B(chan)) {
302 powerArray = ahp->ah_modePowerArray5112;
303 data = powerArray[headerInfo11B].pDataPerChannel;
304 numChannels = powerArray[headerInfo11B].numChannels;
308 /* Make sure the channel is in the range of the TP values
311 if ((numChannels < 1) ||
312 (chan->channel < data[0].channelValue) ||
313 (chan->channel > data[numChannels-1].channelValue))
316 /* Linearly interpolate the power value now */
318 (i<numChannels) && (chan->channel > data[i].channelValue);
320 totalD = data[i].channelValue - data[last].channelValue;
322 totalF = data[i].maxPower_t4 - data[last].maxPower_t4;
323 *maxPow = (int8_t) ((totalF*(chan->channel-data[last].channelValue) + data[last].maxPower_t4*totalD)/totalD);
325 totalMin = ar9280GetMinPower(ah,&data[i]) - ar9280GetMinPower(ah, &data[last]);
326 *minPow = (int8_t) ((totalMin*(chan->channel-data[last].channelValue) + ar9280GetMinPower(ah, &data[last])*totalD)/totalD);
329 if (chan->channel == data[i].channelValue) {
330 *maxPow = data[i].maxPower_t4;
331 *minPow = ar9280GetMinPower(ah, &data[i]);
337 *maxPow = *minPow = 0;
343 * The ordering of nfarray is thus:
345 * nfarray[0]: Chain 0 ctl
346 * nfarray[1]: Chain 1 ctl
347 * nfarray[2]: Chain 2 ctl
348 * nfarray[3]: Chain 0 ext
349 * nfarray[4]: Chain 1 ext
350 * nfarray[5]: Chain 2 ext
353 ar9280GetNoiseFloor(struct ath_hal *ah, int16_t nfarray[])
357 nf = MS(OS_REG_READ(ah, AR_PHY_CCA), AR9280_PHY_MINCCA_PWR);
359 nf = 0 - ((nf ^ 0x1ff) + 1);
360 HALDEBUG(ah, HAL_DEBUG_NFCAL,
361 "NF calibrated [ctl] [chain 0] is %d\n", nf);
364 nf = MS(OS_REG_READ(ah, AR_PHY_CH1_CCA), AR9280_PHY_CH1_MINCCA_PWR);
366 nf = 0 - ((nf ^ 0x1ff) + 1);
367 HALDEBUG(ah, HAL_DEBUG_NFCAL,
368 "NF calibrated [ctl] [chain 1] is %d\n", nf);
371 nf = MS(OS_REG_READ(ah, AR_PHY_EXT_CCA), AR9280_PHY_EXT_MINCCA_PWR);
373 nf = 0 - ((nf ^ 0x1ff) + 1);
374 HALDEBUG(ah, HAL_DEBUG_NFCAL,
375 "NF calibrated [ext] [chain 0] is %d\n", nf);
378 nf = MS(OS_REG_READ(ah, AR_PHY_CH1_EXT_CCA), AR9280_PHY_CH1_EXT_MINCCA_PWR);
380 nf = 0 - ((nf ^ 0x1ff) + 1);
381 HALDEBUG(ah, HAL_DEBUG_NFCAL,
382 "NF calibrated [ext] [chain 1] is %d\n", nf);
385 /* Chain 2 - invalid */
392 * Adjust NF based on statistical values for 5GHz frequencies.
393 * Stubbed:Not used by Fowl
396 ar9280GetNfAdjust(struct ath_hal *ah, const HAL_CHANNEL_INTERNAL *c)
402 * Free memory for analog bank scratch buffers
405 ar9280RfDetach(struct ath_hal *ah)
407 struct ath_hal_5212 *ahp = AH5212(ah);
409 HALASSERT(ahp->ah_rfHal != AH_NULL);
410 ath_hal_free(ahp->ah_rfHal);
411 ahp->ah_rfHal = AH_NULL;
415 ar9280RfAttach(struct ath_hal *ah, HAL_STATUS *status)
417 struct ath_hal_5212 *ahp = AH5212(ah);
418 struct ar9280State *priv;
420 HALDEBUG(ah, HAL_DEBUG_ATTACH, "%s: attach AR9280 radio\n", __func__);
422 HALASSERT(ahp->ah_rfHal == AH_NULL);
423 priv = ath_hal_malloc(sizeof(struct ar9280State));
424 if (priv == AH_NULL) {
425 HALDEBUG(ah, HAL_DEBUG_ANY,
426 "%s: cannot allocate private state\n", __func__);
427 *status = HAL_ENOMEM; /* XXX */
430 priv->base.rfDetach = ar9280RfDetach;
431 priv->base.writeRegs = ar9280WriteRegs;
432 priv->base.getRfBank = ar9280GetRfBank;
433 priv->base.setChannel = ar9280SetChannel;
434 priv->base.setRfRegs = ar9280SetRfRegs;
435 priv->base.setPowerTable = ar9280SetPowerTable;
436 priv->base.getChannelMaxMinPower = ar9280GetChannelMaxMinPower;
437 priv->base.getNfAdjust = ar9280GetNfAdjust;
439 ahp->ah_pcdacTable = priv->pcdacTable;
440 ahp->ah_pcdacTableSize = sizeof(priv->pcdacTable);
441 ahp->ah_rfHal = &priv->base;
443 * Set noise floor adjust method; we arrange a
444 * direct call instead of thunking.
446 AH_PRIVATE(ah)->ah_getNfAdjust = priv->base.getNfAdjust;
447 AH_PRIVATE(ah)->ah_getNoiseFloor = ar9280GetNoiseFloor;
453 ar9280RfProbe(struct ath_hal *ah)
455 return (AR_SREV_MERLIN(ah));
458 AH_RF(RF9280, ar9280RfProbe, ar9280RfAttach);