xref: /freebsd/sys/dev/ath/ath_hal/ar9002/ar9280.c (revision 10b59a9b4add0320d52c15ce057dd697261e7dfc)
1 /*
2  * Copyright (c) 2008-2009 Sam Leffler, Errno Consulting
3  * Copyright (c) 2008 Atheros Communications, Inc.
4  *
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.
8  *
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.
16  *
17  * $FreeBSD$
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
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
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, &centers);
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 			if ((freq % 20) == 0) {
116 				aModeRefSel = 3;
117 			} else if ((freq % 10) == 0) {
118 				aModeRefSel = 2;
119 			}
120 			if (aModeRefSel) break;
121 		case 1:
122 		default:
123 			aModeRefSel = 0;
124 			/* Enable 2G (fractional) mode for channels which are 5MHz spaced */
125 			fracMode = 1;
126 			refDivA = 1;
127 			channelSel = (freq * 0x8000)/15;
128 
129 			/* RefDivA setting */
130 			OS_A_REG_RMW_FIELD(ah, AR_AN_SYNTH9,
131 			    AR_AN_SYNTH9_REFDIVA, refDivA);
132 		}
133 
134 		if (!fracMode) {
135 			ndiv = (freq * (refDivA >> aModeRefSel))/60;
136 			channelSel =  ndiv & 0x1ff;
137 			channelFrac = (ndiv & 0xfffffe00) * 2;
138 			channelSel = (channelSel << 17) | channelFrac;
139 		}
140 	}
141 
142 	reg32 = reg32 | (bMode << 29) | (fracMode << 28) |
143 	    (aModeRefSel << 26) | (channelSel);
144 
145 	OS_REG_WRITE(ah, AR_PHY_SYNTH_CONTROL, reg32);
146 
147 	AH_PRIVATE(ah)->ah_curchan = chan;
148 
149 	return AH_TRUE;
150 }
151 
152 /*
153  * Return a reference to the requested RF Bank.
154  */
155 static uint32_t *
156 ar9280GetRfBank(struct ath_hal *ah, int bank)
157 {
158 	HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown RF Bank %d requested\n",
159 	    __func__, bank);
160 	return AH_NULL;
161 }
162 
163 /*
164  * Reads EEPROM header info from device structure and programs
165  * all rf registers
166  */
167 static HAL_BOOL
168 ar9280SetRfRegs(struct ath_hal *ah, const struct ieee80211_channel *chan,
169                 uint16_t modesIndex, uint16_t *rfXpdGain)
170 {
171 	return AH_TRUE;		/* nothing to do */
172 }
173 
174 /*
175  * Read the transmit power levels from the structures taken from EEPROM
176  * Interpolate read transmit power values for this channel
177  * Organize the transmit power values into a table for writing into the hardware
178  */
179 
180 static HAL_BOOL
181 ar9280SetPowerTable(struct ath_hal *ah, int16_t *pPowerMin, int16_t *pPowerMax,
182 	const struct ieee80211_channel *chan, uint16_t *rfXpdGain)
183 {
184 	return AH_TRUE;
185 }
186 
187 #if 0
188 static int16_t
189 ar9280GetMinPower(struct ath_hal *ah, EXPN_DATA_PER_CHANNEL_5112 *data)
190 {
191     int i, minIndex;
192     int16_t minGain,minPwr,minPcdac,retVal;
193 
194     /* Assume NUM_POINTS_XPD0 > 0 */
195     minGain = data->pDataPerXPD[0].xpd_gain;
196     for (minIndex=0,i=1; i<NUM_XPD_PER_CHANNEL; i++) {
197         if (data->pDataPerXPD[i].xpd_gain < minGain) {
198             minIndex = i;
199             minGain = data->pDataPerXPD[i].xpd_gain;
200         }
201     }
202     minPwr = data->pDataPerXPD[minIndex].pwr_t4[0];
203     minPcdac = data->pDataPerXPD[minIndex].pcdac[0];
204     for (i=1; i<NUM_POINTS_XPD0; i++) {
205         if (data->pDataPerXPD[minIndex].pwr_t4[i] < minPwr) {
206             minPwr = data->pDataPerXPD[minIndex].pwr_t4[i];
207             minPcdac = data->pDataPerXPD[minIndex].pcdac[i];
208         }
209     }
210     retVal = minPwr - (minPcdac*2);
211     return(retVal);
212 }
213 #endif
214 
215 static HAL_BOOL
216 ar9280GetChannelMaxMinPower(struct ath_hal *ah,
217 	const struct ieee80211_channel *chan,
218 	int16_t *maxPow, int16_t *minPow)
219 {
220 #if 0
221     struct ath_hal_5212 *ahp = AH5212(ah);
222     int numChannels=0,i,last;
223     int totalD, totalF,totalMin;
224     EXPN_DATA_PER_CHANNEL_5112 *data=AH_NULL;
225     EEPROM_POWER_EXPN_5112 *powerArray=AH_NULL;
226 
227     *maxPow = 0;
228     if (IS_CHAN_A(chan)) {
229         powerArray = ahp->ah_modePowerArray5112;
230         data = powerArray[headerInfo11A].pDataPerChannel;
231         numChannels = powerArray[headerInfo11A].numChannels;
232     } else if (IS_CHAN_G(chan) || IS_CHAN_108G(chan)) {
233         /* XXX - is this correct? Should we also use the same power for turbo G? */
234         powerArray = ahp->ah_modePowerArray5112;
235         data = powerArray[headerInfo11G].pDataPerChannel;
236         numChannels = powerArray[headerInfo11G].numChannels;
237     } else if (IS_CHAN_B(chan)) {
238         powerArray = ahp->ah_modePowerArray5112;
239         data = powerArray[headerInfo11B].pDataPerChannel;
240         numChannels = powerArray[headerInfo11B].numChannels;
241     } else {
242         return (AH_TRUE);
243     }
244     /* Make sure the channel is in the range of the TP values
245      *  (freq piers)
246      */
247     if ((numChannels < 1) ||
248         (chan->channel < data[0].channelValue) ||
249         (chan->channel > data[numChannels-1].channelValue))
250         return(AH_FALSE);
251 
252     /* Linearly interpolate the power value now */
253     for (last=0,i=0;
254          (i<numChannels) && (chan->channel > data[i].channelValue);
255          last=i++);
256     totalD = data[i].channelValue - data[last].channelValue;
257     if (totalD > 0) {
258         totalF = data[i].maxPower_t4 - data[last].maxPower_t4;
259         *maxPow = (int8_t) ((totalF*(chan->channel-data[last].channelValue) + data[last].maxPower_t4*totalD)/totalD);
260 
261         totalMin = ar9280GetMinPower(ah,&data[i]) - ar9280GetMinPower(ah, &data[last]);
262         *minPow = (int8_t) ((totalMin*(chan->channel-data[last].channelValue) + ar9280GetMinPower(ah, &data[last])*totalD)/totalD);
263         return (AH_TRUE);
264     } else {
265         if (chan->channel == data[i].channelValue) {
266             *maxPow = data[i].maxPower_t4;
267             *minPow = ar9280GetMinPower(ah, &data[i]);
268             return(AH_TRUE);
269         } else
270             return(AH_FALSE);
271     }
272 #else
273 	*maxPow = *minPow = 0;
274 	return AH_FALSE;
275 #endif
276 }
277 
278 /*
279  * The ordering of nfarray is thus:
280  *
281  * nfarray[0]: Chain 0 ctl
282  * nfarray[1]: Chain 1 ctl
283  * nfarray[2]: Chain 2 ctl
284  * nfarray[3]: Chain 0 ext
285  * nfarray[4]: Chain 1 ext
286  * nfarray[5]: Chain 2 ext
287  */
288 static void
289 ar9280GetNoiseFloor(struct ath_hal *ah, int16_t nfarray[])
290 {
291 	int16_t nf;
292 
293 	nf = MS(OS_REG_READ(ah, AR_PHY_CCA), AR9280_PHY_MINCCA_PWR);
294 	if (nf & 0x100)
295 		nf = 0 - ((nf ^ 0x1ff) + 1);
296 	HALDEBUG(ah, HAL_DEBUG_NFCAL,
297 	    "NF calibrated [ctl] [chain 0] is %d\n", nf);
298 	nfarray[0] = nf;
299 
300 	nf = MS(OS_REG_READ(ah, AR_PHY_CH1_CCA), AR9280_PHY_CH1_MINCCA_PWR);
301 	if (nf & 0x100)
302 		nf = 0 - ((nf ^ 0x1ff) + 1);
303 	HALDEBUG(ah, HAL_DEBUG_NFCAL,
304 	    "NF calibrated [ctl] [chain 1] is %d\n", nf);
305 	nfarray[1] = nf;
306 
307 	nf = MS(OS_REG_READ(ah, AR_PHY_EXT_CCA), AR9280_PHY_EXT_MINCCA_PWR);
308 	if (nf & 0x100)
309 		nf = 0 - ((nf ^ 0x1ff) + 1);
310 	HALDEBUG(ah, HAL_DEBUG_NFCAL,
311 	    "NF calibrated [ext] [chain 0] is %d\n", nf);
312 	nfarray[3] = nf;
313 
314 	nf = MS(OS_REG_READ(ah, AR_PHY_CH1_EXT_CCA), AR9280_PHY_CH1_EXT_MINCCA_PWR);
315 	if (nf & 0x100)
316 		nf = 0 - ((nf ^ 0x1ff) + 1);
317 	HALDEBUG(ah, HAL_DEBUG_NFCAL,
318 	    "NF calibrated [ext] [chain 1] is %d\n", nf);
319 	nfarray[4] = nf;
320 
321         /* Chain 2 - invalid */
322         nfarray[2] = 0;
323         nfarray[5] = 0;
324 
325 }
326 
327 /*
328  * Adjust NF based on statistical values for 5GHz frequencies.
329  * Stubbed:Not used by Fowl
330  */
331 int16_t
332 ar9280GetNfAdjust(struct ath_hal *ah, const HAL_CHANNEL_INTERNAL *c)
333 {
334 	return 0;
335 }
336 
337 /*
338  * Free memory for analog bank scratch buffers
339  */
340 static void
341 ar9280RfDetach(struct ath_hal *ah)
342 {
343 	struct ath_hal_5212 *ahp = AH5212(ah);
344 
345 	HALASSERT(ahp->ah_rfHal != AH_NULL);
346 	ath_hal_free(ahp->ah_rfHal);
347 	ahp->ah_rfHal = AH_NULL;
348 }
349 
350 HAL_BOOL
351 ar9280RfAttach(struct ath_hal *ah, HAL_STATUS *status)
352 {
353 	struct ath_hal_5212 *ahp = AH5212(ah);
354 	struct ar9280State *priv;
355 
356 	HALDEBUG(ah, HAL_DEBUG_ATTACH, "%s: attach AR9280 radio\n", __func__);
357 
358 	HALASSERT(ahp->ah_rfHal == AH_NULL);
359 	priv = ath_hal_malloc(sizeof(struct ar9280State));
360 	if (priv == AH_NULL) {
361 		HALDEBUG(ah, HAL_DEBUG_ANY,
362 		    "%s: cannot allocate private state\n", __func__);
363 		*status = HAL_ENOMEM;		/* XXX */
364 		return AH_FALSE;
365 	}
366 	priv->base.rfDetach		= ar9280RfDetach;
367 	priv->base.writeRegs		= ar9280WriteRegs;
368 	priv->base.getRfBank		= ar9280GetRfBank;
369 	priv->base.setChannel		= ar9280SetChannel;
370 	priv->base.setRfRegs		= ar9280SetRfRegs;
371 	priv->base.setPowerTable	= ar9280SetPowerTable;
372 	priv->base.getChannelMaxMinPower = ar9280GetChannelMaxMinPower;
373 	priv->base.getNfAdjust		= ar9280GetNfAdjust;
374 
375 	ahp->ah_pcdacTable = priv->pcdacTable;
376 	ahp->ah_pcdacTableSize = sizeof(priv->pcdacTable);
377 	ahp->ah_rfHal = &priv->base;
378 	/*
379 	 * Set noise floor adjust method; we arrange a
380 	 * direct call instead of thunking.
381 	 */
382 	AH_PRIVATE(ah)->ah_getNfAdjust = priv->base.getNfAdjust;
383 	AH_PRIVATE(ah)->ah_getNoiseFloor = ar9280GetNoiseFloor;
384 
385 	return AH_TRUE;
386 }
387