HAL_CHANNEL * ar9300_get_extension_channel(struct ath_hal *ah) { struct ath_hal_private *ahp = AH_PRIVATE(ah); struct ath_hal_private_tables *aht = AH_TABLES(ah); int i = 0; HAL_CHANNEL_INTERNAL *ichan = AH_NULL; CHAN_CENTERS centers; ichan = ahp->ah_curchan; ar9300_get_channel_centers(ah, ichan, ¢ers); if (centers.ctl_center == centers.ext_center) { return AH_NULL; } for (i = 0; i < ahp->ah_nchan; i++) { ichan = &aht->ah_channels[i]; if (ichan->channel == centers.ext_center) { return (HAL_CHANNEL*)ichan; } } return AH_NULL; }
/* * Take the MHz channel value and set the Channel value * * ASSUMES: Writes enabled to analog bus * * Actual Expression, * * For 2GHz channel, * Channel Frequency = (3/4) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^17) * (freq_ref = 40MHz) * * For 5GHz channel, * Channel Frequency = (3/2) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^10) * (freq_ref = 40MHz/(24>>amode_ref_sel)) * * For 5GHz channels which are 5MHz spaced, * Channel Frequency = (3/2) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^17) * (freq_ref = 40MHz) */ static HAL_BOOL ar9300_set_channel(struct ath_hal *ah, struct ieee80211_channel *chan) { u_int16_t b_mode, frac_mode = 0, a_mode_ref_sel = 0; u_int32_t freq, channel_sel, reg32; u_int8_t clk_25mhz = AH9300(ah)->clk_25mhz; CHAN_CENTERS centers; int load_synth_channel; #ifdef AH_DEBUG_ALQ HAL_CHANNEL_INTERNAL *ichan = ath_hal_checkchannel(ah, chan); #endif /* * Put this behind AH_DEBUG_ALQ for now until the Hornet * channel_sel code below is made to work. */ #ifdef AH_DEBUG_ALQ OS_MARK(ah, AH_MARK_SETCHANNEL, ichan->channel); #endif ar9300_get_channel_centers(ah, chan, ¢ers); freq = centers.synth_center; if (freq < 4800) { /* 2 GHz, fractional mode */ b_mode = 1; /* 2 GHz */ if (AR_SREV_HORNET(ah)) { #if 0 u_int32_t ichan = ieee80211_mhz2ieee(ah, chan->ic_freq, chan->ic_flags); HALASSERT(ichan > 0 && ichan <= 14); if (clk_25mhz) { channel_sel = ar9300_chansel_xtal_25M[ichan - 1]; } else { channel_sel = ar9300_chansel_xtal_40M[ichan - 1]; } #endif uint32_t i; /* * Pay close attention to this bit! * * We need to map the actual desired synth frequency to * one of the channel select array entries. * * For HT20, it'll align with the channel we select. * * For HT40 though it won't - the centre frequency * will not be the frequency of chan->ic_freq or ichan->freq; * it needs to be whatever frequency maps to 'freq'. */ i = ath_hal_mhz2ieee_2ghz(ah, freq); HALASSERT(i > 0 && i <= 14); if (clk_25mhz) { channel_sel = ar9300_chansel_xtal_25M[i - 1]; } else { channel_sel = ar9300_chansel_xtal_40M[i - 1]; } } else if (AR_SREV_POSEIDON(ah) || AR_SREV_APHRODITE(ah)) { u_int32_t channel_frac; /* * freq_ref = (40 / (refdiva >> a_mode_ref_sel)); * (where refdiva = 1 and amoderefsel = 0) * ndiv = ((chan_mhz * 4) / 3) / freq_ref; * chansel = int(ndiv), chanfrac = (ndiv - chansel) * 0x20000 */ channel_sel = (freq * 4) / 120; channel_frac = (((freq * 4) % 120) * 0x20000) / 120; channel_sel = (channel_sel << 17) | (channel_frac); } else if (AR_SREV_WASP(ah) || AR_SREV_SCORPION(ah) || AR_SREV_HONEYBEE(ah)) { u_int32_t channel_frac; if (clk_25mhz) { /* * freq_ref = (50 / (refdiva >> a_mode_ref_sel)); * (where refdiva = 1 and amoderefsel = 0) * ndiv = ((chan_mhz * 4) / 3) / freq_ref; * chansel = int(ndiv), chanfrac = (ndiv - chansel) * 0x20000 */ if (AR_SREV_SCORPION(ah) || AR_SREV_HONEYBEE(ah)) { /* Doubler is off for Scorpion */ channel_sel = (freq * 4) / 75; channel_frac = (((freq * 4) % 75) * 0x20000) / 75; } else { channel_sel = (freq * 2) / 75; channel_frac = (((freq * 2) % 75) * 0x20000) / 75; } } else { /* * freq_ref = (50 / (refdiva >> a_mode_ref_sel)); * (where refdiva = 1 and amoderefsel = 0) * ndiv = ((chan_mhz * 4) / 3) / freq_ref; * chansel = int(ndiv), chanfrac = (ndiv - chansel) * 0x20000 */ if (AR_SREV_SCORPION(ah)) { /* Doubler is off for Scorpion */ channel_sel = (freq * 4) / 120; channel_frac = (((freq * 4) % 120) * 0x20000) / 120; } else { channel_sel = (freq * 2) / 120; channel_frac = (((freq * 2) % 120) * 0x20000) / 120; } } channel_sel = (channel_sel << 17) | (channel_frac); } else { channel_sel = CHANSEL_2G(freq); } } else { b_mode = 0; /* 5 GHz */ if ((AR_SREV_WASP(ah) || AR_SREV_SCORPION(ah)) && clk_25mhz){ u_int32_t channel_frac; /* * freq_ref = (50 / (refdiva >> amoderefsel)); * (refdiva = 1, amoderefsel = 0) * ndiv = ((chan_mhz * 2) / 3) / freq_ref; * chansel = int(ndiv), chanfrac = (ndiv - chansel) * 0x20000 */ channel_sel = freq / 75 ; channel_frac = ((freq % 75) * 0x20000) / 75; channel_sel = (channel_sel << 17) | (channel_frac); } else { channel_sel = CHANSEL_5G(freq); /* Doubler is ON, so, divide channel_sel by 2. */ channel_sel >>= 1; } } /* Enable fractional mode for all channels */ frac_mode = 1; a_mode_ref_sel = 0; load_synth_channel = 0; reg32 = (b_mode << 29); OS_REG_WRITE(ah, AR_PHY_SYNTH_CONTROL, reg32); /* Enable Long shift Select for Synthesizer */ OS_REG_RMW_FIELD(ah, AR_PHY_65NM_CH0_SYNTH4, AR_PHY_SYNTH4_LONG_SHIFT_SELECT, 1); /* program synth. setting */ reg32 = (channel_sel << 2) | (a_mode_ref_sel << 28) | (frac_mode << 30) | (load_synth_channel << 31); if (IEEE80211_IS_CHAN_QUARTER(chan)) { reg32 += CHANSEL_5G_DOT5MHZ; } OS_REG_WRITE(ah, AR_PHY_65NM_CH0_SYNTH7, reg32); /* Toggle Load Synth channel bit */ load_synth_channel = 1; reg32 |= load_synth_channel << 31; OS_REG_WRITE(ah, AR_PHY_65NM_CH0_SYNTH7, reg32); AH_PRIVATE(ah)->ah_curchan = chan; return AH_TRUE; }