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 channelSel = (freq * 0x8000)/15;
139 /* RefDivA setting */
140 OS_A_REG_RMW_FIELD(ah, AR_AN_SYNTH9,
141 AR_AN_SYNTH9_REFDIVA, refDivA);
145 ndiv = (freq * (refDivA >> aModeRefSel))/60;
146 channelSel = ndiv & 0x1ff;
147 channelFrac = (ndiv & 0xfffffe00) * 2;
148 channelSel = (channelSel << 17) | channelFrac;
152 reg32 = reg32 | (bMode << 29) | (fracMode << 28) |
153 (aModeRefSel << 26) | (channelSel);
155 OS_REG_WRITE(ah, AR_PHY_SYNTH_CONTROL, reg32);
157 AH_PRIVATE(ah)->ah_curchan = chan;
163 * Return a reference to the requested RF Bank.
166 ar9280GetRfBank(struct ath_hal *ah, int bank)
168 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown RF Bank %d requested\n",
174 * Reads EEPROM header info from device structure and programs
178 ar9280SetRfRegs(struct ath_hal *ah, const struct ieee80211_channel *chan,
179 uint16_t modesIndex, uint16_t *rfXpdGain)
181 return AH_TRUE; /* nothing to do */
185 * Read the transmit power levels from the structures taken from EEPROM
186 * Interpolate read transmit power values for this channel
187 * Organize the transmit power values into a table for writing into the hardware
191 ar9280SetPowerTable(struct ath_hal *ah, int16_t *pPowerMin, int16_t *pPowerMax,
192 const struct ieee80211_channel *chan, uint16_t *rfXpdGain)
199 ar9280GetMinPower(struct ath_hal *ah, EXPN_DATA_PER_CHANNEL_5112 *data)
202 int16_t minGain,minPwr,minPcdac,retVal;
204 /* Assume NUM_POINTS_XPD0 > 0 */
205 minGain = data->pDataPerXPD[0].xpd_gain;
206 for (minIndex=0,i=1; i<NUM_XPD_PER_CHANNEL; i++) {
207 if (data->pDataPerXPD[i].xpd_gain < minGain) {
209 minGain = data->pDataPerXPD[i].xpd_gain;
212 minPwr = data->pDataPerXPD[minIndex].pwr_t4[0];
213 minPcdac = data->pDataPerXPD[minIndex].pcdac[0];
214 for (i=1; i<NUM_POINTS_XPD0; i++) {
215 if (data->pDataPerXPD[minIndex].pwr_t4[i] < minPwr) {
216 minPwr = data->pDataPerXPD[minIndex].pwr_t4[i];
217 minPcdac = data->pDataPerXPD[minIndex].pcdac[i];
220 retVal = minPwr - (minPcdac*2);
226 ar9280GetChannelMaxMinPower(struct ath_hal *ah,
227 const struct ieee80211_channel *chan,
228 int16_t *maxPow, int16_t *minPow)
231 struct ath_hal_5212 *ahp = AH5212(ah);
232 int numChannels=0,i,last;
233 int totalD, totalF,totalMin;
234 EXPN_DATA_PER_CHANNEL_5112 *data=AH_NULL;
235 EEPROM_POWER_EXPN_5112 *powerArray=AH_NULL;
238 if (IS_CHAN_A(chan)) {
239 powerArray = ahp->ah_modePowerArray5112;
240 data = powerArray[headerInfo11A].pDataPerChannel;
241 numChannels = powerArray[headerInfo11A].numChannels;
242 } else if (IS_CHAN_G(chan) || IS_CHAN_108G(chan)) {
243 /* XXX - is this correct? Should we also use the same power for turbo G? */
244 powerArray = ahp->ah_modePowerArray5112;
245 data = powerArray[headerInfo11G].pDataPerChannel;
246 numChannels = powerArray[headerInfo11G].numChannels;
247 } else if (IS_CHAN_B(chan)) {
248 powerArray = ahp->ah_modePowerArray5112;
249 data = powerArray[headerInfo11B].pDataPerChannel;
250 numChannels = powerArray[headerInfo11B].numChannels;
254 /* Make sure the channel is in the range of the TP values
257 if ((numChannels < 1) ||
258 (chan->channel < data[0].channelValue) ||
259 (chan->channel > data[numChannels-1].channelValue))
262 /* Linearly interpolate the power value now */
264 (i<numChannels) && (chan->channel > data[i].channelValue);
266 totalD = data[i].channelValue - data[last].channelValue;
268 totalF = data[i].maxPower_t4 - data[last].maxPower_t4;
269 *maxPow = (int8_t) ((totalF*(chan->channel-data[last].channelValue) + data[last].maxPower_t4*totalD)/totalD);
271 totalMin = ar9280GetMinPower(ah,&data[i]) - ar9280GetMinPower(ah, &data[last]);
272 *minPow = (int8_t) ((totalMin*(chan->channel-data[last].channelValue) + ar9280GetMinPower(ah, &data[last])*totalD)/totalD);
275 if (chan->channel == data[i].channelValue) {
276 *maxPow = data[i].maxPower_t4;
277 *minPow = ar9280GetMinPower(ah, &data[i]);
283 *maxPow = *minPow = 0;
289 * The ordering of nfarray is thus:
291 * nfarray[0]: Chain 0 ctl
292 * nfarray[1]: Chain 1 ctl
293 * nfarray[2]: Chain 2 ctl
294 * nfarray[3]: Chain 0 ext
295 * nfarray[4]: Chain 1 ext
296 * nfarray[5]: Chain 2 ext
299 ar9280GetNoiseFloor(struct ath_hal *ah, int16_t nfarray[])
303 nf = MS(OS_REG_READ(ah, AR_PHY_CCA), AR9280_PHY_MINCCA_PWR);
305 nf = 0 - ((nf ^ 0x1ff) + 1);
306 HALDEBUG(ah, HAL_DEBUG_NFCAL,
307 "NF calibrated [ctl] [chain 0] is %d\n", nf);
310 nf = MS(OS_REG_READ(ah, AR_PHY_CH1_CCA), AR9280_PHY_CH1_MINCCA_PWR);
312 nf = 0 - ((nf ^ 0x1ff) + 1);
313 HALDEBUG(ah, HAL_DEBUG_NFCAL,
314 "NF calibrated [ctl] [chain 1] is %d\n", nf);
317 nf = MS(OS_REG_READ(ah, AR_PHY_EXT_CCA), AR9280_PHY_EXT_MINCCA_PWR);
319 nf = 0 - ((nf ^ 0x1ff) + 1);
320 HALDEBUG(ah, HAL_DEBUG_NFCAL,
321 "NF calibrated [ext] [chain 0] is %d\n", nf);
324 nf = MS(OS_REG_READ(ah, AR_PHY_CH1_EXT_CCA), AR9280_PHY_CH1_EXT_MINCCA_PWR);
326 nf = 0 - ((nf ^ 0x1ff) + 1);
327 HALDEBUG(ah, HAL_DEBUG_NFCAL,
328 "NF calibrated [ext] [chain 1] is %d\n", nf);
331 /* Chain 2 - invalid */
338 * Adjust NF based on statistical values for 5GHz frequencies.
339 * Stubbed:Not used by Fowl
342 ar9280GetNfAdjust(struct ath_hal *ah, const HAL_CHANNEL_INTERNAL *c)
348 * Free memory for analog bank scratch buffers
351 ar9280RfDetach(struct ath_hal *ah)
353 struct ath_hal_5212 *ahp = AH5212(ah);
355 HALASSERT(ahp->ah_rfHal != AH_NULL);
356 ath_hal_free(ahp->ah_rfHal);
357 ahp->ah_rfHal = AH_NULL;
361 ar9280RfAttach(struct ath_hal *ah, HAL_STATUS *status)
363 struct ath_hal_5212 *ahp = AH5212(ah);
364 struct ar9280State *priv;
366 HALDEBUG(ah, HAL_DEBUG_ATTACH, "%s: attach AR9280 radio\n", __func__);
368 HALASSERT(ahp->ah_rfHal == AH_NULL);
369 priv = ath_hal_malloc(sizeof(struct ar9280State));
370 if (priv == AH_NULL) {
371 HALDEBUG(ah, HAL_DEBUG_ANY,
372 "%s: cannot allocate private state\n", __func__);
373 *status = HAL_ENOMEM; /* XXX */
376 priv->base.rfDetach = ar9280RfDetach;
377 priv->base.writeRegs = ar9280WriteRegs;
378 priv->base.getRfBank = ar9280GetRfBank;
379 priv->base.setChannel = ar9280SetChannel;
380 priv->base.setRfRegs = ar9280SetRfRegs;
381 priv->base.setPowerTable = ar9280SetPowerTable;
382 priv->base.getChannelMaxMinPower = ar9280GetChannelMaxMinPower;
383 priv->base.getNfAdjust = ar9280GetNfAdjust;
385 ahp->ah_pcdacTable = priv->pcdacTable;
386 ahp->ah_pcdacTableSize = sizeof(priv->pcdacTable);
387 ahp->ah_rfHal = &priv->base;
389 * Set noise floor adjust method; we arrange a
390 * direct call instead of thunking.
392 AH_PRIVATE(ah)->ah_getNfAdjust = priv->base.getNfAdjust;
393 AH_PRIVATE(ah)->ah_getNoiseFloor = ar9280GetNoiseFloor;
399 ar9280RfProbe(struct ath_hal *ah)
401 return (AR_SREV_MERLIN(ah));
404 AH_RF(RF9280, ar9280RfProbe, ar9280RfAttach);