2 * Copyright (c) 2010 Atheros Communications Inc.
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 #include "ar9003_phy.h"
21 * ar9003_hw_set_channel - set channel on single-chip device
22 * @ah: atheros hardware structure
25 * This is the function to change channel on single-chip devices, that is
26 * all devices after ar9280.
28 * This function takes the channel value in MHz and sets
29 * hardware channel value. Assumes writes have been enabled to analog bus.
34 * Channel Frequency = (3/4) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^17)
38 * Channel Frequency = (3/2) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^10)
39 * (freq_ref = 40MHz/(24>>amodeRefSel))
41 * For 5GHz channels which are 5MHz spaced,
42 * Channel Frequency = (3/2) * freq_ref * (chansel[8:0] + chanfrac[16:0]/2^17)
45 static int ar9003_hw_set_channel(struct ath_hw *ah, struct ath9k_channel *chan)
47 u16 bMode, fracMode = 0, aModeRefSel = 0;
48 u32 freq, channelSel = 0, reg32 = 0;
49 struct chan_centers centers;
52 ath9k_hw_get_channel_centers(ah, chan, ¢ers);
53 freq = centers.synth_center;
55 if (freq < 4800) { /* 2 GHz, fractional mode */
56 channelSel = CHANSEL_2G(freq);
60 channelSel = CHANSEL_5G(freq);
61 /* Doubler is ON, so, divide channelSel by 2. */
67 /* Enable fractional mode for all channels */
72 reg32 = (bMode << 29);
73 REG_WRITE(ah, AR_PHY_SYNTH_CONTROL, reg32);
75 /* Enable Long shift Select for Synthesizer */
76 REG_RMW_FIELD(ah, AR_PHY_65NM_CH0_SYNTH4,
77 AR_PHY_SYNTH4_LONG_SHIFT_SELECT, 1);
79 /* Program Synth. setting */
80 reg32 = (channelSel << 2) | (fracMode << 30) |
81 (aModeRefSel << 28) | (loadSynthChannel << 31);
82 REG_WRITE(ah, AR_PHY_65NM_CH0_SYNTH7, reg32);
84 /* Toggle Load Synth channel bit */
86 reg32 = (channelSel << 2) | (fracMode << 30) |
87 (aModeRefSel << 28) | (loadSynthChannel << 31);
88 REG_WRITE(ah, AR_PHY_65NM_CH0_SYNTH7, reg32);
91 ah->curchan_rad_index = -1;
97 * ar9003_hw_spur_mitigate - convert baseband spur frequency
98 * @ah: atheros hardware structure
101 * For single-chip solutions. Converts to baseband spur frequency given the
102 * input channel frequency and compute register settings below.
104 * Spur mitigation for MRC CCK
106 static void ar9003_hw_spur_mitigate(struct ath_hw *ah,
107 struct ath9k_channel *chan)
109 u32 spur_freq[4] = { 2420, 2440, 2464, 2480 };
110 int cur_bb_spur, negative = 0, cck_spur_freq;
114 * Need to verify range +/- 10 MHz in control channel, otherwise spur
115 * is out-of-band and can be ignored.
118 for (i = 0; i < 4; i++) {
120 cur_bb_spur = spur_freq[i] - chan->channel;
122 if (cur_bb_spur < 0) {
124 cur_bb_spur = -cur_bb_spur;
126 if (cur_bb_spur < 10) {
127 cck_spur_freq = (int)((cur_bb_spur << 19) / 11);
130 cck_spur_freq = -cck_spur_freq;
132 cck_spur_freq = cck_spur_freq & 0xfffff;
134 REG_RMW_FIELD(ah, AR_PHY_AGC_CONTROL,
135 AR_PHY_AGC_CONTROL_YCOK_MAX, 0x7);
136 REG_RMW_FIELD(ah, AR_PHY_CCK_SPUR_MIT,
137 AR_PHY_CCK_SPUR_MIT_SPUR_RSSI_THR, 0x7f);
138 REG_RMW_FIELD(ah, AR_PHY_CCK_SPUR_MIT,
139 AR_PHY_CCK_SPUR_MIT_SPUR_FILTER_TYPE,
141 REG_RMW_FIELD(ah, AR_PHY_CCK_SPUR_MIT,
142 AR_PHY_CCK_SPUR_MIT_USE_CCK_SPUR_MIT,
144 REG_RMW_FIELD(ah, AR_PHY_CCK_SPUR_MIT,
145 AR_PHY_CCK_SPUR_MIT_CCK_SPUR_FREQ,
152 REG_RMW_FIELD(ah, AR_PHY_AGC_CONTROL,
153 AR_PHY_AGC_CONTROL_YCOK_MAX, 0x5);
154 REG_RMW_FIELD(ah, AR_PHY_CCK_SPUR_MIT,
155 AR_PHY_CCK_SPUR_MIT_USE_CCK_SPUR_MIT, 0x0);
156 REG_RMW_FIELD(ah, AR_PHY_CCK_SPUR_MIT,
157 AR_PHY_CCK_SPUR_MIT_CCK_SPUR_FREQ, 0x0);
160 static u32 ar9003_hw_compute_pll_control(struct ath_hw *ah,
161 struct ath9k_channel *chan)
165 pll = SM(0x5, AR_RTC_9300_PLL_REFDIV);
167 if (chan && IS_CHAN_HALF_RATE(chan))
168 pll |= SM(0x1, AR_RTC_9300_PLL_CLKSEL);
169 else if (chan && IS_CHAN_QUARTER_RATE(chan))
170 pll |= SM(0x2, AR_RTC_9300_PLL_CLKSEL);
172 if (chan && IS_CHAN_5GHZ(chan)) {
173 pll |= SM(0x28, AR_RTC_9300_PLL_DIV);
176 * When doing fast clock, set PLL to 0x142c
178 if (IS_CHAN_A_5MHZ_SPACED(chan))
181 pll |= SM(0x2c, AR_RTC_9300_PLL_DIV);
186 static void ar9003_hw_set_channel_regs(struct ath_hw *ah,
187 struct ath9k_channel *chan)
190 u32 enableDacFifo = 0;
193 (REG_READ(ah, AR_PHY_GEN_CTRL) & AR_PHY_GC_ENABLE_DAC_FIFO);
195 /* Enable 11n HT, 20 MHz */
196 phymode = AR_PHY_GC_HT_EN | AR_PHY_GC_SINGLE_HT_LTF1 | AR_PHY_GC_WALSH |
197 AR_PHY_GC_SHORT_GI_40 | enableDacFifo;
199 /* Configure baseband for dynamic 20/40 operation */
200 if (IS_CHAN_HT40(chan)) {
201 phymode |= AR_PHY_GC_DYN2040_EN;
202 /* Configure control (primary) channel at +-10MHz */
203 if ((chan->chanmode == CHANNEL_A_HT40PLUS) ||
204 (chan->chanmode == CHANNEL_G_HT40PLUS))
205 phymode |= AR_PHY_GC_DYN2040_PRI_CH;
209 /* make sure we preserve INI settings */
210 phymode |= REG_READ(ah, AR_PHY_GEN_CTRL);
211 /* turn off Green Field detection for STA for now */
212 phymode &= ~AR_PHY_GC_GF_DETECT_EN;
214 REG_WRITE(ah, AR_PHY_GEN_CTRL, phymode);
216 /* Configure MAC for 20/40 operation */
217 ath9k_hw_set11nmac2040(ah);
219 /* global transmit timeout (25 TUs default)*/
220 REG_WRITE(ah, AR_GTXTO, 25 << AR_GTXTO_TIMEOUT_LIMIT_S);
221 /* carrier sense timeout */
222 REG_WRITE(ah, AR_CST, 0xF << AR_CST_TIMEOUT_LIMIT_S);
225 static void ar9003_hw_init_bb(struct ath_hw *ah,
226 struct ath9k_channel *chan)
231 void ar9003_hw_set_chain_masks(struct ath_hw *ah, u8 rx, u8 tx)
235 REG_SET_BIT(ah, AR_PHY_ANALOG_SWAP,
236 AR_PHY_SWAP_ALT_CHAIN);
241 REG_WRITE(ah, AR_PHY_RX_CHAINMASK, rx);
242 REG_WRITE(ah, AR_PHY_CAL_CHAINMASK, rx);
248 REG_WRITE(ah, AR_SELFGEN_MASK, tx);
250 REG_SET_BIT(ah, AR_PHY_ANALOG_SWAP,
251 AR_PHY_SWAP_ALT_CHAIN);
256 * Override INI values with chip specific configuration.
258 static void ar9003_hw_override_ini(struct ath_hw *ah)
263 * Set the RX_ABORT and RX_DIS and clear it only after
264 * RXE is set for MAC. This prevents frames with
265 * corrupted descriptor status.
267 REG_SET_BIT(ah, AR_DIAG_SW, (AR_DIAG_RX_DIS | AR_DIAG_RX_ABORT));
270 * For AR9280 and above, there is a new feature that allows
271 * Multicast search based on both MAC Address and Key ID. By default,
272 * this feature is enabled. But since the driver is not using this
273 * feature, we switch it off; otherwise multicast search based on
274 * MAC addr only will fail.
276 val = REG_READ(ah, AR_PCU_MISC_MODE2) & (~AR_ADHOC_MCAST_KEYID_ENABLE);
277 REG_WRITE(ah, AR_PCU_MISC_MODE2,
278 val | AR_AGG_WEP_ENABLE_FIX | AR_AGG_WEP_ENABLE);
281 static void ar9003_hw_prog_ini(struct ath_hw *ah,
282 struct ar5416IniArray *iniArr,
285 unsigned int i, regWrites = 0;
287 /* New INI format: Array may be undefined (pre, core, post arrays) */
288 if (!iniArr->ia_array)
292 * New INI format: Pre, core, and post arrays for a given subsystem
293 * may be modal (> 2 columns) or non-modal (2 columns). Determine if
294 * the array is non-modal and force the column to 1.
296 if (column >= iniArr->ia_columns)
299 for (i = 0; i < iniArr->ia_rows; i++) {
300 u32 reg = INI_RA(iniArr, i, 0);
301 u32 val = INI_RA(iniArr, i, column);
303 REG_WRITE(ah, reg, val);
306 * Determine if this is a shift register value, and insert the
307 * configured delay if so.
309 if (reg >= 0x16000 && reg < 0x17000
310 && ah->config.analog_shiftreg)
317 static int ar9003_hw_process_ini(struct ath_hw *ah,
318 struct ath9k_channel *chan)
320 struct ath_regulatory *regulatory = ath9k_hw_regulatory(ah);
321 unsigned int regWrites = 0, i;
322 struct ieee80211_channel *channel = chan->chan;
323 u32 modesIndex, freqIndex;
325 switch (chan->chanmode) {
331 case CHANNEL_A_HT40PLUS:
332 case CHANNEL_A_HT40MINUS:
342 case CHANNEL_G_HT40PLUS:
343 case CHANNEL_G_HT40MINUS:
352 for (i = 0; i < ATH_INI_NUM_SPLIT; i++) {
353 ar9003_hw_prog_ini(ah, &ah->iniSOC[i], modesIndex);
354 ar9003_hw_prog_ini(ah, &ah->iniMac[i], modesIndex);
355 ar9003_hw_prog_ini(ah, &ah->iniBB[i], modesIndex);
356 ar9003_hw_prog_ini(ah, &ah->iniRadio[i], modesIndex);
359 REG_WRITE_ARRAY(&ah->iniModesRxGain, 1, regWrites);
360 REG_WRITE_ARRAY(&ah->iniModesTxGain, modesIndex, regWrites);
363 * For 5GHz channels requiring Fast Clock, apply
364 * different modal values.
366 if (IS_CHAN_A_5MHZ_SPACED(chan))
367 REG_WRITE_ARRAY(&ah->iniModesAdditional,
368 modesIndex, regWrites);
370 ar9003_hw_override_ini(ah);
371 ar9003_hw_set_channel_regs(ah, chan);
372 ar9003_hw_set_chain_masks(ah, ah->rxchainmask, ah->txchainmask);
375 ah->eep_ops->set_txpower(ah, chan,
376 ath9k_regd_get_ctl(regulatory, chan),
377 channel->max_antenna_gain * 2,
378 channel->max_power * 2,
379 min((u32) MAX_RATE_POWER,
380 (u32) regulatory->power_limit));
385 static void ar9003_hw_set_rfmode(struct ath_hw *ah,
386 struct ath9k_channel *chan)
391 static void ar9003_hw_mark_phy_inactive(struct ath_hw *ah)
396 static void ar9003_hw_set_delta_slope(struct ath_hw *ah,
397 struct ath9k_channel *chan)
402 static bool ar9003_hw_rfbus_req(struct ath_hw *ah)
408 static void ar9003_hw_rfbus_done(struct ath_hw *ah)
413 static void ar9003_hw_enable_rfkill(struct ath_hw *ah)
418 static void ar9003_hw_set_diversity(struct ath_hw *ah, bool value)
423 static bool ar9003_hw_ani_control(struct ath_hw *ah,
424 enum ath9k_ani_cmd cmd, int param)
430 void ar9003_hw_attach_phy_ops(struct ath_hw *ah)
432 struct ath_hw_private_ops *priv_ops = ath9k_hw_private_ops(ah);
434 priv_ops->rf_set_freq = ar9003_hw_set_channel;
435 priv_ops->spur_mitigate_freq = ar9003_hw_spur_mitigate;
436 priv_ops->compute_pll_control = ar9003_hw_compute_pll_control;
437 priv_ops->set_channel_regs = ar9003_hw_set_channel_regs;
438 priv_ops->init_bb = ar9003_hw_init_bb;
439 priv_ops->process_ini = ar9003_hw_process_ini;
440 priv_ops->set_rfmode = ar9003_hw_set_rfmode;
441 priv_ops->mark_phy_inactive = ar9003_hw_mark_phy_inactive;
442 priv_ops->set_delta_slope = ar9003_hw_set_delta_slope;
443 priv_ops->rfbus_req = ar9003_hw_rfbus_req;
444 priv_ops->rfbus_done = ar9003_hw_rfbus_done;
445 priv_ops->enable_rfkill = ar9003_hw_enable_rfkill;
446 priv_ops->set_diversity = ar9003_hw_set_diversity;
447 priv_ops->ani_control = ar9003_hw_ani_control;