xref: /netbsd-src/sys/external/isc/atheros_hal/dist/ar5416/ar9280.c (revision 074f2fafe1b258b60bacef6340409434df3f44fa)
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 "ar5416/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 	HAL_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,HAL_CHANNEL_INTERNAL * chan)73 ar9280SetChannel(struct ath_hal *ah, HAL_CHANNEL_INTERNAL *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 
80 	OS_MARK(ah, AH_MARK_SETCHANNEL, chan->ic_freq);
81 
82 	ar5416GetChannelCenters(ah, chan, &centers);
83 	freq = centers.synth_center;
84 
85 	reg32 = OS_REG_READ(ah, AR_PHY_SYNTH_CONTROL);
86 	reg32 &= 0xc0000000;
87 
88 	if (freq < 4800) {     /* 2 GHz, fractional mode */
89 		uint32_t txctl;
90 
91 		bMode = 1;
92 		fracMode = 1;
93 		aModeRefSel = 0;
94 		channelSel = (freq * 0x10000)/15;
95 
96 		txctl = OS_REG_READ(ah, AR_PHY_CCK_TX_CTRL);
97 		if (freq == 2484) {
98 			/* Enable channel spreading for channel 14 */
99 			OS_REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
100 			    txctl | AR_PHY_CCK_TX_CTRL_JAPAN);
101 		} else {
102 			OS_REG_WRITE(ah, AR_PHY_CCK_TX_CTRL,
103 			    txctl &~ AR_PHY_CCK_TX_CTRL_JAPAN);
104 		}
105 	} else {
106 		bMode = 0;
107 		fracMode = 0;
108 
109 		if ((freq % 20) == 0) {
110 			aModeRefSel = 3;
111 		} else if ((freq % 10) == 0) {
112 			aModeRefSel = 2;
113 		} else {
114 			aModeRefSel = 0;
115 			/* Enable 2G (fractional) mode for channels which are 5MHz spaced */
116 			fracMode = 1;
117 			refDivA = 1;
118 			channelSel = (freq * 0x8000)/15;
119 
120 			/* RefDivA setting */
121 			OS_REG_RMW_FIELD(ah, AR_AN_SYNTH9,
122 			    AR_AN_SYNTH9_REFDIVA, refDivA);
123 		}
124 		if (!fracMode) {
125 			ndiv = (freq * (refDivA >> aModeRefSel))/60;
126 			channelSel =  ndiv & 0x1ff;
127 			channelFrac = (ndiv & 0xfffffe00) * 2;
128 			channelSel = (channelSel << 17) | channelFrac;
129 		}
130 	}
131 
132 	reg32 = reg32 | (bMode << 29) | (fracMode << 28) |
133 	    (aModeRefSel << 26) | (channelSel);
134 
135 	OS_REG_WRITE(ah, AR_PHY_SYNTH_CONTROL, reg32);
136 
137 	AH_PRIVATE(ah)->ah_curchan = chan;
138 
139 	return AH_TRUE;
140 }
141 
142 /*
143  * Return a reference to the requested RF Bank.
144  */
145 static uint32_t *
ar9280GetRfBank(struct ath_hal * ah,int bank)146 ar9280GetRfBank(struct ath_hal *ah, int bank)
147 {
148 	HALDEBUG(ah, HAL_DEBUG_ANY, "%s: unknown RF Bank %d requested\n",
149 	    __func__, bank);
150 	return AH_NULL;
151 }
152 
153 /*
154  * Reads EEPROM header info from device structure and programs
155  * all rf registers
156  */
157 static HAL_BOOL
ar9280SetRfRegs(struct ath_hal * ah,HAL_CHANNEL_INTERNAL * chan,uint16_t modesIndex,uint16_t * rfXpdGain)158 ar9280SetRfRegs(struct ath_hal *ah, HAL_CHANNEL_INTERNAL *chan,
159                 uint16_t modesIndex, uint16_t *rfXpdGain)
160 {
161 	return AH_TRUE;		/* nothing to do */
162 }
163 
164 /*
165  * Read the transmit power levels from the structures taken from EEPROM
166  * Interpolate read transmit power values for this channel
167  * Organize the transmit power values into a table for writing into the hardware
168  */
169 
170 static HAL_BOOL
ar9280SetPowerTable(struct ath_hal * ah,int16_t * pPowerMin,int16_t * pPowerMax,HAL_CHANNEL_INTERNAL * chan,uint16_t * rfXpdGain)171 ar9280SetPowerTable(struct ath_hal *ah, int16_t *pPowerMin, int16_t *pPowerMax,
172 	HAL_CHANNEL_INTERNAL *chan, uint16_t *rfXpdGain)
173 {
174 	return AH_TRUE;
175 }
176 
177 #if 0
178 static int16_t
179 ar9280GetMinPower(struct ath_hal *ah, EXPN_DATA_PER_CHANNEL_5112 *data)
180 {
181     int i, minIndex;
182     int16_t minGain,minPwr,minPcdac,retVal;
183 
184     /* Assume NUM_POINTS_XPD0 > 0 */
185     minGain = data->pDataPerXPD[0].xpd_gain;
186     for (minIndex=0,i=1; i<NUM_XPD_PER_CHANNEL; i++) {
187         if (data->pDataPerXPD[i].xpd_gain < minGain) {
188             minIndex = i;
189             minGain = data->pDataPerXPD[i].xpd_gain;
190         }
191     }
192     minPwr = data->pDataPerXPD[minIndex].pwr_t4[0];
193     minPcdac = data->pDataPerXPD[minIndex].pcdac[0];
194     for (i=1; i<NUM_POINTS_XPD0; i++) {
195         if (data->pDataPerXPD[minIndex].pwr_t4[i] < minPwr) {
196             minPwr = data->pDataPerXPD[minIndex].pwr_t4[i];
197             minPcdac = data->pDataPerXPD[minIndex].pcdac[i];
198         }
199     }
200     retVal = minPwr - (minPcdac*2);
201     return(retVal);
202 }
203 #endif
204 
205 static HAL_BOOL
ar9280GetChannelMaxMinPower(struct ath_hal * ah,HAL_CHANNEL * chan,int16_t * maxPow,int16_t * minPow)206 ar9280GetChannelMaxMinPower(struct ath_hal *ah,
207 	HAL_CHANNEL *chan,
208 	int16_t *maxPow, int16_t *minPow)
209 {
210 #if 0
211     struct ath_hal_5212 *ahp = AH5212(ah);
212     int numChannels=0,i,last;
213     int totalD, totalF,totalMin;
214     EXPN_DATA_PER_CHANNEL_5112 *data=AH_NULL;
215     EEPROM_POWER_EXPN_5112 *powerArray=AH_NULL;
216 
217     *maxPow = 0;
218     if (IS_CHAN_A(chan)) {
219         powerArray = ahp->ah_modePowerArray5112;
220         data = powerArray[headerInfo11A].pDataPerChannel;
221         numChannels = powerArray[headerInfo11A].numChannels;
222     } else if (IS_CHAN_G(chan) || IS_CHAN_108G(chan)) {
223         /* XXX - is this correct? Should we also use the same power for turbo G? */
224         powerArray = ahp->ah_modePowerArray5112;
225         data = powerArray[headerInfo11G].pDataPerChannel;
226         numChannels = powerArray[headerInfo11G].numChannels;
227     } else if (IS_CHAN_B(chan)) {
228         powerArray = ahp->ah_modePowerArray5112;
229         data = powerArray[headerInfo11B].pDataPerChannel;
230         numChannels = powerArray[headerInfo11B].numChannels;
231     } else {
232         return (AH_TRUE);
233     }
234     /* Make sure the channel is in the range of the TP values
235      *  (freq piers)
236      */
237     if ((numChannels < 1) ||
238         (chan->channel < data[0].channelValue) ||
239         (chan->channel > data[numChannels-1].channelValue))
240         return(AH_FALSE);
241 
242     /* Linearly interpolate the power value now */
243     for (last=0,i=0;
244          (i<numChannels) && (chan->channel > data[i].channelValue);
245          last=i++);
246     totalD = data[i].channelValue - data[last].channelValue;
247     if (totalD > 0) {
248         totalF = data[i].maxPower_t4 - data[last].maxPower_t4;
249         *maxPow = (int8_t) ((totalF*(chan->channel-data[last].channelValue) + data[last].maxPower_t4*totalD)/totalD);
250 
251         totalMin = ar9280GetMinPower(ah,&data[i]) - ar9280GetMinPower(ah, &data[last]);
252         *minPow = (int8_t) ((totalMin*(chan->channel-data[last].channelValue) + ar9280GetMinPower(ah, &data[last])*totalD)/totalD);
253         return (AH_TRUE);
254     } else {
255         if (chan->channel == data[i].channelValue) {
256             *maxPow = data[i].maxPower_t4;
257             *minPow = ar9280GetMinPower(ah, &data[i]);
258             return(AH_TRUE);
259         } else
260             return(AH_FALSE);
261     }
262 #else
263 	*maxPow = *minPow = 0;
264 	return AH_FALSE;
265 #endif
266 }
267 
268 static void
ar9280GetNoiseFloor(struct ath_hal * ah,int16_t nfarray[])269 ar9280GetNoiseFloor(struct ath_hal *ah, int16_t nfarray[])
270 {
271 	int16_t nf;
272 
273 	nf = MS(OS_REG_READ(ah, AR_PHY_CCA), AR9280_PHY_MINCCA_PWR);
274 	if (nf & 0x100)
275 		nf = 0 - ((nf ^ 0x1ff) + 1);
276 	HALDEBUG(ah, HAL_DEBUG_NFCAL,
277 	    "NF calibrated [ctl] [chain 0] is %d\n", nf);
278 	nfarray[0] = nf;
279 
280 	nf = MS(OS_REG_READ(ah, AR_PHY_CH1_CCA), AR9280_PHY_CH1_MINCCA_PWR);
281 	if (nf & 0x100)
282 		nf = 0 - ((nf ^ 0x1ff) + 1);
283 	HALDEBUG(ah, HAL_DEBUG_NFCAL,
284 	    "NF calibrated [ctl] [chain 1] is %d\n", nf);
285 	nfarray[1] = nf;
286 
287 	nf = MS(OS_REG_READ(ah, AR_PHY_EXT_CCA), AR9280_PHY_EXT_MINCCA_PWR);
288 	if (nf & 0x100)
289 		nf = 0 - ((nf ^ 0x1ff) + 1);
290 	HALDEBUG(ah, HAL_DEBUG_NFCAL,
291 	    "NF calibrated [ext] [chain 0] is %d\n", nf);
292 	nfarray[3] = nf;
293 
294 	nf = MS(OS_REG_READ(ah, AR_PHY_CH1_EXT_CCA), AR9280_PHY_CH1_EXT_MINCCA_PWR);
295 	if (nf & 0x100)
296 		nf = 0 - ((nf ^ 0x1ff) + 1);
297 	HALDEBUG(ah, HAL_DEBUG_NFCAL,
298 	    "NF calibrated [ext] [chain 1] is %d\n", nf);
299 	nfarray[4] = nf;
300 }
301 
302 /*
303  * Adjust NF based on statistical values for 5GHz frequencies.
304  * Stubbed:Not used by Fowl
305  */
306 int16_t
ar9280GetNfAdjust(struct ath_hal * ah,const HAL_CHANNEL_INTERNAL * c)307 ar9280GetNfAdjust(struct ath_hal *ah, const HAL_CHANNEL_INTERNAL *c)
308 {
309 	return 0;
310 }
311 
312 /*
313  * Free memory for analog bank scratch buffers
314  */
315 static void
ar9280RfDetach(struct ath_hal * ah)316 ar9280RfDetach(struct ath_hal *ah)
317 {
318 	struct ath_hal_5212 *ahp = AH5212(ah);
319 
320 	HALASSERT(ahp->ah_rfHal != AH_NULL);
321 	ath_hal_free(ahp->ah_rfHal);
322 	ahp->ah_rfHal = AH_NULL;
323 }
324 
325 HAL_BOOL
ar9280RfAttach(struct ath_hal * ah,HAL_STATUS * status)326 ar9280RfAttach(struct ath_hal *ah, HAL_STATUS *status)
327 {
328 	struct ath_hal_5212 *ahp = AH5212(ah);
329 	struct ar9280State *priv;
330 
331 	HALDEBUG(ah, HAL_DEBUG_ATTACH, "%s: attach AR9280 radio\n", __func__);
332 
333 	HALASSERT(ahp->ah_rfHal == AH_NULL);
334 	priv = ath_hal_malloc(sizeof(struct ar9280State));
335 	if (priv == AH_NULL) {
336 		HALDEBUG(ah, HAL_DEBUG_ANY,
337 		    "%s: cannot allocate private state\n", __func__);
338 		*status = HAL_ENOMEM;		/* XXX */
339 		return AH_FALSE;
340 	}
341 	priv->base.rfDetach		= ar9280RfDetach;
342 	priv->base.writeRegs		= ar9280WriteRegs;
343 	priv->base.getRfBank		= ar9280GetRfBank;
344 	priv->base.setChannel		= ar9280SetChannel;
345 	priv->base.setRfRegs		= ar9280SetRfRegs;
346 	priv->base.setPowerTable	= ar9280SetPowerTable;
347 	priv->base.getChannelMaxMinPower = ar9280GetChannelMaxMinPower;
348 	priv->base.getNfAdjust		= ar9280GetNfAdjust;
349 
350 	ahp->ah_pcdacTable = priv->pcdacTable;
351 	ahp->ah_pcdacTableSize = sizeof(priv->pcdacTable);
352 	ahp->ah_rfHal = &priv->base;
353 	/*
354 	 * Set noise floor adjust method; we arrange a
355 	 * direct call instead of thunking.
356 	 */
357 	AH_PRIVATE(ah)->ah_getNfAdjust = priv->base.getNfAdjust;
358 	AH_PRIVATE(ah)->ah_getNoiseFloor = ar9280GetNoiseFloor;
359 
360 	return AH_TRUE;
361 }
362