1 /*-
2 * SPDX-License-Identifier: ISC
3 *
4 * Copyright (c) 2008-2009 Sam Leffler, Errno Consulting
5 * Copyright (c) 2008 Atheros Communications, Inc.
6 *
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19 #include "opt_ah.h"
20
21 /*
22 * NB: Merlin and later have a simpler RF backend.
23 */
24 #include "ah.h"
25 #include "ah_internal.h"
26
27 #include "ah_eeprom_v14.h"
28
29 #include "ar9002/ar9280.h"
30 #include "ar5416/ar5416reg.h"
31 #include "ar5416/ar5416phy.h"
32
33 #define N(a) (sizeof(a)/sizeof(a[0]))
34
35 struct ar9280State {
36 RF_HAL_FUNCS base; /* public state, must be first */
37 uint16_t pcdacTable[1]; /* XXX */
38 };
39 #define AR9280(ah) ((struct ar9280State *) AH5212(ah)->ah_rfHal)
40
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);
44
45 static void
ar9280WriteRegs(struct ath_hal * ah,u_int modesIndex,u_int freqIndex,int writes)46 ar9280WriteRegs(struct ath_hal *ah, u_int modesIndex, u_int freqIndex,
47 int writes)
48 {
49 (void) ath_hal_ini_write(ah, &AH5416(ah)->ah_ini_bb_rfgain,
50 freqIndex, writes);
51 }
52
53 /*
54 * Take the MHz channel value and set the Channel value
55 *
56 * ASSUMES: Writes enabled to analog bus
57 *
58 * Actual Expression,
59 *
60 * For 2GHz channel,
61 * Channel Frequency = (3/4) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^17)
62 * (freq_ref = 40MHz)
63 *
64 * For 5GHz channel,
65 * Channel Frequency = (3/2) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^10)
66 * (freq_ref = 40MHz/(24>>amodeRefSel))
67 *
68 * For 5GHz channels which are 5MHz spaced,
69 * Channel Frequency = (3/2) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^17)
70 * (freq_ref = 40MHz)
71 */
72 static HAL_BOOL
ar9280SetChannel(struct ath_hal * ah,const struct ieee80211_channel * chan)73 ar9280SetChannel(struct ath_hal *ah, const struct ieee80211_channel *chan)
74 {
75 uint16_t bMode, fracMode, aModeRefSel = 0;
76 uint32_t freq, ndiv, channelSel = 0, channelFrac = 0, reg32 = 0;
77 CHAN_CENTERS centers;
78 uint32_t refDivA = 24;
79 uint8_t frac_n_5g;
80
81 OS_MARK(ah, AH_MARK_SETCHANNEL, chan->ic_freq);
82
83 ar5416GetChannelCenters(ah, chan, ¢ers);
84 freq = centers.synth_center;
85
86 reg32 = OS_REG_READ(ah, AR_PHY_SYNTH_CONTROL);
87 reg32 &= 0xc0000000;
88
89 if (ath_hal_eepromGet(ah, AR_EEP_FRAC_N_5G, &frac_n_5g) != HAL_OK)
90 frac_n_5g = 0;
91
92 if (freq < 4800) { /* 2 GHz, fractional mode */
93 uint32_t txctl;
94
95 bMode = 1;
96 fracMode = 1;
97 aModeRefSel = 0;
98 channelSel = (freq * 0x10000)/15;
99
100 txctl = OS_REG_READ(ah, AR_PHY_CCK_TX_CTRL);
101 if (freq == 2484) {
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);
105 } else {
106 OS_REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
107 txctl &~ AR_PHY_CCK_TX_CTRL_JAPAN);
108 }
109 } else {
110 bMode = 0;
111 fracMode = 0;
112
113 switch (frac_n_5g) {
114 case 0:
115 /*
116 * Enable fractional mode for half/quarter rate
117 * channels.
118 *
119 * This is from the Linux ath9k code, rather than
120 * the Atheros HAL code.
121 */
122 if (IEEE80211_IS_CHAN_QUARTER(chan) ||
123 IEEE80211_IS_CHAN_HALF(chan))
124 aModeRefSel = 0;
125 else if ((freq % 20) == 0) {
126 aModeRefSel = 3;
127 } else if ((freq % 10) == 0) {
128 aModeRefSel = 2;
129 }
130 if (aModeRefSel) break;
131 case 1:
132 default:
133 aModeRefSel = 0;
134 /* Enable 2G (fractional) mode for channels which are 5MHz spaced */
135
136 /*
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.
140
141 *
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.
151 *
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.
156 *
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
163 * the law.
164 */
165 #if 0
166 if (freq % 5 == 0) {
167 #endif
168 /* Normal */
169 fracMode = 1;
170 refDivA = 1;
171 channelSel = (freq * 0x8000)/15;
172 #if 0
173 } else {
174 /* Offset by 500KHz */
175 uint32_t f, ch, ch2;
176
177 fracMode = 1;
178 refDivA = 1;
179
180 /* Calculate the "adjusted" frequency */
181 f = freq - 2;
182 ch = (((f - 4800) * 10) / 25) + 1;
183
184 ch2 = ((ch * 25) / 5) + 9600;
185 channelSel = (ch2 * 0x4000) / 15;
186 //ath_hal_printf(ah,
187 // "%s: freq=%d, ch=%d, ch2=%d, "
188 // "channelSel=%d\n",
189 // __func__, freq, ch, ch2, channelSel);
190 }
191 #endif
192
193 /* RefDivA setting */
194 OS_A_REG_RMW_FIELD(ah, AR_AN_SYNTH9,
195 AR_AN_SYNTH9_REFDIVA, refDivA);
196 }
197
198 if (!fracMode) {
199 ndiv = (freq * (refDivA >> aModeRefSel))/60;
200 channelSel = ndiv & 0x1ff;
201 channelFrac = (ndiv & 0xfffffe00) * 2;
202 channelSel = (channelSel << 17) | channelFrac;
203 }
204 }
205
206 reg32 = reg32 | (bMode << 29) | (fracMode << 28) |
207 (aModeRefSel << 26) | (channelSel);
208
209 OS_REG_WRITE(ah, AR_PHY_SYNTH_CONTROL, reg32);
210
211 AH_PRIVATE(ah)->ah_curchan = chan;
212
213 return AH_TRUE;
214 }
215
216 /*
217 * Return a reference to the requested RF Bank.
218 */
219 static uint32_t *
ar9280GetRfBank(struct ath_hal * ah,int bank)220 ar9280GetRfBank(struct ath_hal *ah, int bank)
221 {
222 HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown RF Bank %d requested\n",
223 __func__, bank);
224 return AH_NULL;
225 }
226
227 /*
228 * Reads EEPROM header info from device structure and programs
229 * all rf registers
230 */
231 static HAL_BOOL
ar9280SetRfRegs(struct ath_hal * ah,const struct ieee80211_channel * chan,uint16_t modesIndex,uint16_t * rfXpdGain)232 ar9280SetRfRegs(struct ath_hal *ah, const struct ieee80211_channel *chan,
233 uint16_t modesIndex, uint16_t *rfXpdGain)
234 {
235 return AH_TRUE; /* nothing to do */
236 }
237
238 /*
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
242 */
243
244 static HAL_BOOL
ar9280SetPowerTable(struct ath_hal * ah,int16_t * pPowerMin,int16_t * pPowerMax,const struct ieee80211_channel * chan,uint16_t * rfXpdGain)245 ar9280SetPowerTable(struct ath_hal *ah, int16_t *pPowerMin, int16_t *pPowerMax,
246 const struct ieee80211_channel *chan, uint16_t *rfXpdGain)
247 {
248 return AH_TRUE;
249 }
250
251 #if 0
252 static int16_t
253 ar9280GetMinPower(struct ath_hal *ah, EXPN_DATA_PER_CHANNEL_5112 *data)
254 {
255 int i, minIndex;
256 int16_t minGain,minPwr,minPcdac,retVal;
257
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) {
262 minIndex = i;
263 minGain = data->pDataPerXPD[i].xpd_gain;
264 }
265 }
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];
272 }
273 }
274 retVal = minPwr - (minPcdac*2);
275 return(retVal);
276 }
277 #endif
278
279 static HAL_BOOL
ar9280GetChannelMaxMinPower(struct ath_hal * ah,const struct ieee80211_channel * chan,int16_t * maxPow,int16_t * minPow)280 ar9280GetChannelMaxMinPower(struct ath_hal *ah,
281 const struct ieee80211_channel *chan,
282 int16_t *maxPow, int16_t *minPow)
283 {
284 #if 0
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;
290
291 *maxPow = 0;
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;
305 } else {
306 return (AH_TRUE);
307 }
308 /* Make sure the channel is in the range of the TP values
309 * (freq piers)
310 */
311 if ((numChannels < 1) ||
312 (chan->channel < data[0].channelValue) ||
313 (chan->channel > data[numChannels-1].channelValue))
314 return(AH_FALSE);
315
316 /* Linearly interpolate the power value now */
317 for (last=0,i=0;
318 (i<numChannels) && (chan->channel > data[i].channelValue);
319 last=i++);
320 totalD = data[i].channelValue - data[last].channelValue;
321 if (totalD > 0) {
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);
324
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);
327 return (AH_TRUE);
328 } else {
329 if (chan->channel == data[i].channelValue) {
330 *maxPow = data[i].maxPower_t4;
331 *minPow = ar9280GetMinPower(ah, &data[i]);
332 return(AH_TRUE);
333 } else
334 return(AH_FALSE);
335 }
336 #else
337 *maxPow = *minPow = 0;
338 return AH_FALSE;
339 #endif
340 }
341
342 /*
343 * The ordering of nfarray is thus:
344 *
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
351 */
352 static void
ar9280GetNoiseFloor(struct ath_hal * ah,int16_t nfarray[])353 ar9280GetNoiseFloor(struct ath_hal *ah, int16_t nfarray[])
354 {
355 int16_t nf;
356
357 nf = MS(OS_REG_READ(ah, AR_PHY_CCA), AR9280_PHY_MINCCA_PWR);
358 if (nf & 0x100)
359 nf = 0 - ((nf ^ 0x1ff) + 1);
360 HALDEBUG(ah, HAL_DEBUG_NFCAL,
361 "NF calibrated [ctl] [chain 0] is %d\n", nf);
362 nfarray[0] = nf;
363
364 nf = MS(OS_REG_READ(ah, AR_PHY_CH1_CCA), AR9280_PHY_CH1_MINCCA_PWR);
365 if (nf & 0x100)
366 nf = 0 - ((nf ^ 0x1ff) + 1);
367 HALDEBUG(ah, HAL_DEBUG_NFCAL,
368 "NF calibrated [ctl] [chain 1] is %d\n", nf);
369 nfarray[1] = nf;
370
371 nf = MS(OS_REG_READ(ah, AR_PHY_EXT_CCA), AR9280_PHY_EXT_MINCCA_PWR);
372 if (nf & 0x100)
373 nf = 0 - ((nf ^ 0x1ff) + 1);
374 HALDEBUG(ah, HAL_DEBUG_NFCAL,
375 "NF calibrated [ext] [chain 0] is %d\n", nf);
376 nfarray[3] = nf;
377
378 nf = MS(OS_REG_READ(ah, AR_PHY_CH1_EXT_CCA), AR9280_PHY_CH1_EXT_MINCCA_PWR);
379 if (nf & 0x100)
380 nf = 0 - ((nf ^ 0x1ff) + 1);
381 HALDEBUG(ah, HAL_DEBUG_NFCAL,
382 "NF calibrated [ext] [chain 1] is %d\n", nf);
383 nfarray[4] = nf;
384
385 /* Chain 2 - invalid */
386 nfarray[2] = 0;
387 nfarray[5] = 0;
388
389 }
390
391 /*
392 * Adjust NF based on statistical values for 5GHz frequencies.
393 * Stubbed:Not used by Fowl
394 */
395 int16_t
ar9280GetNfAdjust(struct ath_hal * ah,const HAL_CHANNEL_INTERNAL * c)396 ar9280GetNfAdjust(struct ath_hal *ah, const HAL_CHANNEL_INTERNAL *c)
397 {
398 return 0;
399 }
400
401 /*
402 * Free memory for analog bank scratch buffers
403 */
404 static void
ar9280RfDetach(struct ath_hal * ah)405 ar9280RfDetach(struct ath_hal *ah)
406 {
407 struct ath_hal_5212 *ahp = AH5212(ah);
408
409 HALASSERT(ahp->ah_rfHal != AH_NULL);
410 ath_hal_free(ahp->ah_rfHal);
411 ahp->ah_rfHal = AH_NULL;
412 }
413
414 HAL_BOOL
ar9280RfAttach(struct ath_hal * ah,HAL_STATUS * status)415 ar9280RfAttach(struct ath_hal *ah, HAL_STATUS *status)
416 {
417 struct ath_hal_5212 *ahp = AH5212(ah);
418 struct ar9280State *priv;
419
420 HALDEBUG(ah, HAL_DEBUG_ATTACH, "%s: attach AR9280 radio\n", __func__);
421
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 */
428 return AH_FALSE;
429 }
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;
438
439 ahp->ah_pcdacTable = priv->pcdacTable;
440 ahp->ah_pcdacTableSize = sizeof(priv->pcdacTable);
441 ahp->ah_rfHal = &priv->base;
442 /*
443 * Set noise floor adjust method; we arrange a
444 * direct call instead of thunking.
445 */
446 AH_PRIVATE(ah)->ah_getNfAdjust = priv->base.getNfAdjust;
447 AH_PRIVATE(ah)->ah_getNoiseFloor = ar9280GetNoiseFloor;
448
449 return AH_TRUE;
450 }
451
452 static HAL_BOOL
ar9280RfProbe(struct ath_hal * ah)453 ar9280RfProbe(struct ath_hal *ah)
454 {
455 return (AR_SREV_MERLIN(ah));
456 }
457
458 AH_RF(RF9280, ar9280RfProbe, ar9280RfAttach);
459