Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1 | /* |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 2 | * Copyright (c) 2004-2007 Reyk Floeter <reyk@openbsd.org> |
Nick Kossifidis | 33a3182 | 2009-02-09 06:00:34 +0200 | [diff] [blame] | 3 | * Copyright (c) 2006-2009 Nick Kossifidis <mickflemm@gmail.com> |
Nick Kossifidis | c6e387a | 2008-08-29 22:45:39 +0300 | [diff] [blame] | 4 | * Copyright (c) 2007-2008 Jiri Slaby <jirislaby@gmail.com> |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 5 | * Copyright (c) 2008-2009 Felix Fietkau <nbd@openwrt.org> |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 6 | * |
| 7 | * Permission to use, copy, modify, and 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 | */ |
| 20 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 21 | /***********************\ |
| 22 | * PHY related functions * |
| 23 | \***********************/ |
| 24 | |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 25 | #include <linux/delay.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 26 | #include <linux/slab.h> |
Pavel Roskin | bb78c71 | 2011-07-21 13:36:42 -0400 | [diff] [blame] | 27 | #include <asm/unaligned.h> |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 28 | |
| 29 | #include "ath5k.h" |
| 30 | #include "reg.h" |
Nick Kossifidis | 33a3182 | 2009-02-09 06:00:34 +0200 | [diff] [blame] | 31 | #include "rfbuffer.h" |
| 32 | #include "rfgain.h" |
Pavel Roskin | 931be26 | 2011-07-26 22:26:59 -0400 | [diff] [blame] | 33 | #include "../regd.h" |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 34 | |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 35 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 36 | /** |
| 37 | * DOC: PHY related functions |
| 38 | * |
| 39 | * Here we handle the low-level functions related to baseband |
| 40 | * and analog frontend (RF) parts. This is by far the most complex |
| 41 | * part of the hw code so make sure you know what you are doing. |
| 42 | * |
| 43 | * Here is a list of what this is all about: |
| 44 | * |
| 45 | * - Channel setting/switching |
| 46 | * |
| 47 | * - Automatic Gain Control (AGC) calibration |
| 48 | * |
| 49 | * - Noise Floor calibration |
| 50 | * |
| 51 | * - I/Q imbalance calibration (QAM correction) |
| 52 | * |
| 53 | * - Calibration due to thermal changes (gain_F) |
| 54 | * |
| 55 | * - Spur noise mitigation |
| 56 | * |
| 57 | * - RF/PHY initialization for the various operating modes and bwmodes |
| 58 | * |
| 59 | * - Antenna control |
| 60 | * |
| 61 | * - TX power control per channel/rate/packet type |
| 62 | * |
| 63 | * Also have in mind we never got documentation for most of these |
| 64 | * functions, what we have comes mostly from Atheros's code, reverse |
| 65 | * engineering and patent docs/presentations etc. |
| 66 | */ |
| 67 | |
| 68 | |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 69 | /******************\ |
| 70 | * Helper functions * |
| 71 | \******************/ |
| 72 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 73 | /** |
| 74 | * ath5k_hw_radio_revision() - Get the PHY Chip revision |
| 75 | * @ah: The &struct ath5k_hw |
| 76 | * @band: One of enum ieee80211_band |
| 77 | * |
| 78 | * Returns the revision number of a 2GHz, 5GHz or single chip |
| 79 | * radio. |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 80 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 81 | u16 |
| 82 | ath5k_hw_radio_revision(struct ath5k_hw *ah, enum ieee80211_band band) |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 83 | { |
| 84 | unsigned int i; |
| 85 | u32 srev; |
| 86 | u16 ret; |
| 87 | |
| 88 | /* |
| 89 | * Set the radio chip access register |
| 90 | */ |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 91 | switch (band) { |
| 92 | case IEEE80211_BAND_2GHZ: |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 93 | ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_2GHZ, AR5K_PHY(0)); |
| 94 | break; |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 95 | case IEEE80211_BAND_5GHZ: |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 96 | ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_5GHZ, AR5K_PHY(0)); |
| 97 | break; |
| 98 | default: |
| 99 | return 0; |
| 100 | } |
| 101 | |
Nick Kossifidis | 1846ac3 | 2011-11-25 20:40:24 +0200 | [diff] [blame] | 102 | usleep_range(2000, 2500); |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 103 | |
| 104 | /* ...wait until PHY is ready and read the selected radio revision */ |
| 105 | ath5k_hw_reg_write(ah, 0x00001c16, AR5K_PHY(0x34)); |
| 106 | |
| 107 | for (i = 0; i < 8; i++) |
| 108 | ath5k_hw_reg_write(ah, 0x00010000, AR5K_PHY(0x20)); |
| 109 | |
| 110 | if (ah->ah_version == AR5K_AR5210) { |
| 111 | srev = ath5k_hw_reg_read(ah, AR5K_PHY(256) >> 28) & 0xf; |
| 112 | ret = (u16)ath5k_hw_bitswap(srev, 4) + 1; |
| 113 | } else { |
| 114 | srev = (ath5k_hw_reg_read(ah, AR5K_PHY(0x100)) >> 24) & 0xff; |
| 115 | ret = (u16)ath5k_hw_bitswap(((srev & 0xf0) >> 4) | |
| 116 | ((srev & 0x0f) << 4), 8); |
| 117 | } |
| 118 | |
| 119 | /* Reset to the 5GHz mode */ |
| 120 | ath5k_hw_reg_write(ah, AR5K_PHY_SHIFT_5GHZ, AR5K_PHY(0)); |
| 121 | |
| 122 | return ret; |
| 123 | } |
| 124 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 125 | /** |
| 126 | * ath5k_channel_ok() - Check if a channel is supported by the hw |
| 127 | * @ah: The &struct ath5k_hw |
| 128 | * @channel: The &struct ieee80211_channel |
| 129 | * |
| 130 | * Note: We don't do any regulatory domain checks here, it's just |
| 131 | * a sanity check. |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 132 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 133 | bool |
| 134 | ath5k_channel_ok(struct ath5k_hw *ah, struct ieee80211_channel *channel) |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 135 | { |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 136 | u16 freq = channel->center_freq; |
| 137 | |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 138 | /* Check if the channel is in our supported range */ |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 139 | if (channel->band == IEEE80211_BAND_2GHZ) { |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 140 | if ((freq >= ah->ah_capabilities.cap_range.range_2ghz_min) && |
| 141 | (freq <= ah->ah_capabilities.cap_range.range_2ghz_max)) |
| 142 | return true; |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 143 | } else if (channel->band == IEEE80211_BAND_5GHZ) |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 144 | if ((freq >= ah->ah_capabilities.cap_range.range_5ghz_min) && |
| 145 | (freq <= ah->ah_capabilities.cap_range.range_5ghz_max)) |
| 146 | return true; |
| 147 | |
| 148 | return false; |
| 149 | } |
| 150 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 151 | /** |
| 152 | * ath5k_hw_chan_has_spur_noise() - Check if channel is sensitive to spur noise |
| 153 | * @ah: The &struct ath5k_hw |
| 154 | * @channel: The &struct ieee80211_channel |
| 155 | */ |
| 156 | bool |
| 157 | ath5k_hw_chan_has_spur_noise(struct ath5k_hw *ah, |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 158 | struct ieee80211_channel *channel) |
| 159 | { |
| 160 | u8 refclk_freq; |
| 161 | |
| 162 | if ((ah->ah_radio == AR5K_RF5112) || |
| 163 | (ah->ah_radio == AR5K_RF5413) || |
Felix Fietkau | 2d2cf47 | 2011-07-12 09:02:00 +0800 | [diff] [blame] | 164 | (ah->ah_radio == AR5K_RF2413) || |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 165 | (ah->ah_mac_version == (AR5K_SREV_AR2417 >> 4))) |
| 166 | refclk_freq = 40; |
| 167 | else |
| 168 | refclk_freq = 32; |
| 169 | |
| 170 | if ((channel->center_freq % refclk_freq != 0) && |
| 171 | ((channel->center_freq % refclk_freq < 10) || |
| 172 | (channel->center_freq % refclk_freq > 22))) |
| 173 | return true; |
| 174 | else |
| 175 | return false; |
| 176 | } |
| 177 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 178 | /** |
| 179 | * ath5k_hw_rfb_op() - Perform an operation on the given RF Buffer |
| 180 | * @ah: The &struct ath5k_hw |
| 181 | * @rf_regs: The struct ath5k_rf_reg |
| 182 | * @val: New value |
| 183 | * @reg_id: RF register ID |
| 184 | * @set: Indicate we need to swap data |
| 185 | * |
| 186 | * This is an internal function used to modify RF Banks before |
| 187 | * writing them to AR5K_RF_BUFFER. Check out rfbuffer.h for more |
| 188 | * infos. |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 189 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 190 | static unsigned int |
| 191 | ath5k_hw_rfb_op(struct ath5k_hw *ah, const struct ath5k_rf_reg *rf_regs, |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 192 | u32 val, u8 reg_id, bool set) |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 193 | { |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 194 | const struct ath5k_rf_reg *rfreg = NULL; |
| 195 | u8 offset, bank, num_bits, col, position; |
| 196 | u16 entry; |
| 197 | u32 mask, data, last_bit, bits_shifted, first_bit; |
| 198 | u32 *rfb; |
| 199 | s32 bits_left; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 200 | int i; |
| 201 | |
| 202 | data = 0; |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 203 | rfb = ah->ah_rf_banks; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 204 | |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 205 | for (i = 0; i < ah->ah_rf_regs_count; i++) { |
| 206 | if (rf_regs[i].index == reg_id) { |
| 207 | rfreg = &rf_regs[i]; |
| 208 | break; |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | if (rfb == NULL || rfreg == NULL) { |
| 213 | ATH5K_PRINTF("Rf register not found!\n"); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 214 | /* should not happen */ |
| 215 | return 0; |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 216 | } |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 217 | |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 218 | bank = rfreg->bank; |
| 219 | num_bits = rfreg->field.len; |
| 220 | first_bit = rfreg->field.pos; |
| 221 | col = rfreg->field.col; |
| 222 | |
| 223 | /* first_bit is an offset from bank's |
| 224 | * start. Since we have all banks on |
| 225 | * the same array, we use this offset |
| 226 | * to mark each bank's start */ |
| 227 | offset = ah->ah_offset[bank]; |
| 228 | |
| 229 | /* Boundary check */ |
| 230 | if (!(col <= 3 && num_bits <= 32 && first_bit + num_bits <= 319)) { |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 231 | ATH5K_PRINTF("invalid values at offset %u\n", offset); |
| 232 | return 0; |
| 233 | } |
| 234 | |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 235 | entry = ((first_bit - 1) / 8) + offset; |
| 236 | position = (first_bit - 1) % 8; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 237 | |
Joe Perches | e9010e2 | 2008-03-07 14:21:16 -0800 | [diff] [blame] | 238 | if (set) |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 239 | data = ath5k_hw_bitswap(val, num_bits); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 240 | |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 241 | for (bits_shifted = 0, bits_left = num_bits; bits_left > 0; |
Pavel Roskin | e4bbf2f | 2011-07-07 18:14:13 -0400 | [diff] [blame] | 242 | position = 0, entry++) { |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 243 | |
| 244 | last_bit = (position + bits_left > 8) ? 8 : |
| 245 | position + bits_left; |
| 246 | |
| 247 | mask = (((1 << last_bit) - 1) ^ ((1 << position) - 1)) << |
| 248 | (col * 8); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 249 | |
Joe Perches | e9010e2 | 2008-03-07 14:21:16 -0800 | [diff] [blame] | 250 | if (set) { |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 251 | rfb[entry] &= ~mask; |
| 252 | rfb[entry] |= ((data << position) << (col * 8)) & mask; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 253 | data >>= (8 - position); |
| 254 | } else { |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 255 | data |= (((rfb[entry] & mask) >> (col * 8)) >> position) |
| 256 | << bits_shifted; |
| 257 | bits_shifted += last_bit - position; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 258 | } |
| 259 | |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 260 | bits_left -= 8 - position; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 261 | } |
| 262 | |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 263 | data = set ? 1 : ath5k_hw_bitswap(data, num_bits); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 264 | |
| 265 | return data; |
| 266 | } |
| 267 | |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 268 | /** |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 269 | * ath5k_hw_write_ofdm_timings() - set OFDM timings on AR5212 |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 270 | * @ah: the &struct ath5k_hw |
| 271 | * @channel: the currently set channel upon reset |
| 272 | * |
| 273 | * Write the delta slope coefficient (used on pilot tracking ?) for OFDM |
| 274 | * operation on the AR5212 upon reset. This is a helper for ath5k_hw_phy_init. |
| 275 | * |
| 276 | * Since delta slope is floating point we split it on its exponent and |
| 277 | * mantissa and provide these values on hw. |
| 278 | * |
| 279 | * For more infos i think this patent is related |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 280 | * "http://www.freepatentsonline.com/7184495.html" |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 281 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 282 | static inline int |
| 283 | ath5k_hw_write_ofdm_timings(struct ath5k_hw *ah, |
| 284 | struct ieee80211_channel *channel) |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 285 | { |
| 286 | /* Get exponent and mantissa and set it */ |
| 287 | u32 coef_scaled, coef_exp, coef_man, |
| 288 | ds_coef_exp, ds_coef_man, clock; |
| 289 | |
| 290 | BUG_ON(!(ah->ah_version == AR5K_AR5212) || |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 291 | (channel->hw_value == AR5K_MODE_11B)); |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 292 | |
| 293 | /* Get coefficient |
| 294 | * ALGO: coef = (5 * clock / carrier_freq) / 2 |
| 295 | * we scale coef by shifting clock value by 24 for |
| 296 | * better precision since we use integers */ |
Nick Kossifidis | 73a06a6 | 2010-11-23 21:48:32 +0200 | [diff] [blame] | 297 | switch (ah->ah_bwmode) { |
| 298 | case AR5K_BWMODE_40MHZ: |
| 299 | clock = 40 * 2; |
| 300 | break; |
| 301 | case AR5K_BWMODE_10MHZ: |
| 302 | clock = 40 / 2; |
| 303 | break; |
| 304 | case AR5K_BWMODE_5MHZ: |
| 305 | clock = 40 / 4; |
| 306 | break; |
| 307 | default: |
| 308 | clock = 40; |
| 309 | break; |
| 310 | } |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 311 | coef_scaled = ((5 * (clock << 24)) / 2) / channel->center_freq; |
| 312 | |
| 313 | /* Get exponent |
| 314 | * ALGO: coef_exp = 14 - highest set bit position */ |
| 315 | coef_exp = ilog2(coef_scaled); |
| 316 | |
| 317 | /* Doesn't make sense if it's zero*/ |
| 318 | if (!coef_scaled || !coef_exp) |
| 319 | return -EINVAL; |
| 320 | |
| 321 | /* Note: we've shifted coef_scaled by 24 */ |
| 322 | coef_exp = 14 - (coef_exp - 24); |
| 323 | |
| 324 | |
| 325 | /* Get mantissa (significant digits) |
| 326 | * ALGO: coef_mant = floor(coef_scaled* 2^coef_exp+0.5) */ |
| 327 | coef_man = coef_scaled + |
| 328 | (1 << (24 - coef_exp - 1)); |
| 329 | |
| 330 | /* Calculate delta slope coefficient exponent |
| 331 | * and mantissa (remove scaling) and set them on hw */ |
| 332 | ds_coef_man = coef_man >> (24 - coef_exp); |
| 333 | ds_coef_exp = coef_exp - 16; |
| 334 | |
| 335 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_3, |
| 336 | AR5K_PHY_TIMING_3_DSC_MAN, ds_coef_man); |
| 337 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_3, |
| 338 | AR5K_PHY_TIMING_3_DSC_EXP, ds_coef_exp); |
| 339 | |
| 340 | return 0; |
| 341 | } |
| 342 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 343 | /** |
| 344 | * ath5k_hw_phy_disable() - Disable PHY |
| 345 | * @ah: The &struct ath5k_hw |
| 346 | */ |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 347 | int ath5k_hw_phy_disable(struct ath5k_hw *ah) |
| 348 | { |
| 349 | /*Just a try M.F.*/ |
| 350 | ath5k_hw_reg_write(ah, AR5K_PHY_ACT_DISABLE, AR5K_PHY_ACT); |
| 351 | |
| 352 | return 0; |
| 353 | } |
| 354 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 355 | /** |
| 356 | * ath5k_hw_wait_for_synth() - Wait for synth to settle |
| 357 | * @ah: The &struct ath5k_hw |
| 358 | * @channel: The &struct ieee80211_channel |
Nick Kossifidis | 573cfde | 2011-02-04 01:41:02 +0200 | [diff] [blame] | 359 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 360 | static void |
| 361 | ath5k_hw_wait_for_synth(struct ath5k_hw *ah, |
Nick Kossifidis | 573cfde | 2011-02-04 01:41:02 +0200 | [diff] [blame] | 362 | struct ieee80211_channel *channel) |
| 363 | { |
| 364 | /* |
| 365 | * On 5211+ read activation -> rx delay |
| 366 | * and use it (100ns steps). |
| 367 | */ |
| 368 | if (ah->ah_version != AR5K_AR5210) { |
| 369 | u32 delay; |
| 370 | delay = ath5k_hw_reg_read(ah, AR5K_PHY_RX_DELAY) & |
| 371 | AR5K_PHY_RX_DELAY_M; |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 372 | delay = (channel->hw_value == AR5K_MODE_11B) ? |
Nick Kossifidis | 573cfde | 2011-02-04 01:41:02 +0200 | [diff] [blame] | 373 | ((delay << 2) / 22) : (delay / 10); |
| 374 | if (ah->ah_bwmode == AR5K_BWMODE_10MHZ) |
| 375 | delay = delay << 1; |
| 376 | if (ah->ah_bwmode == AR5K_BWMODE_5MHZ) |
| 377 | delay = delay << 2; |
| 378 | /* XXX: /2 on turbo ? Let's be safe |
| 379 | * for now */ |
Nick Kossifidis | 1846ac3 | 2011-11-25 20:40:24 +0200 | [diff] [blame] | 380 | usleep_range(100 + delay, 100 + (2 * delay)); |
Nick Kossifidis | 573cfde | 2011-02-04 01:41:02 +0200 | [diff] [blame] | 381 | } else { |
Nick Kossifidis | 1846ac3 | 2011-11-25 20:40:24 +0200 | [diff] [blame] | 382 | usleep_range(1000, 1500); |
Nick Kossifidis | 573cfde | 2011-02-04 01:41:02 +0200 | [diff] [blame] | 383 | } |
| 384 | } |
| 385 | |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 386 | |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 387 | /**********************\ |
| 388 | * RF Gain optimization * |
| 389 | \**********************/ |
| 390 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 391 | /** |
| 392 | * DOC: RF Gain optimization |
| 393 | * |
Bob Copeland | a180a13 | 2010-08-15 13:03:12 -0400 | [diff] [blame] | 394 | * This code is used to optimize RF gain on different environments |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 395 | * (temperature mostly) based on feedback from a power detector. |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 396 | * |
| 397 | * It's only used on RF5111 and RF5112, later RF chips seem to have |
| 398 | * auto adjustment on hw -notice they have a much smaller BANK 7 and |
| 399 | * no gain optimization ladder-. |
| 400 | * |
| 401 | * For more infos check out this patent doc |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 402 | * "http://www.freepatentsonline.com/7400691.html" |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 403 | * |
| 404 | * This paper describes power drops as seen on the receiver due to |
| 405 | * probe packets |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 406 | * "http://www.cnri.dit.ie/publications/ICT08%20-%20Practical%20Issues |
| 407 | * %20of%20Power%20Control.pdf" |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 408 | * |
| 409 | * And this is the MadWiFi bug entry related to the above |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 410 | * "http://madwifi-project.org/ticket/1659" |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 411 | * with various measurements and diagrams |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 412 | */ |
| 413 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 414 | /** |
| 415 | * ath5k_hw_rfgain_opt_init() - Initialize ah_gain during attach |
| 416 | * @ah: The &struct ath5k_hw |
| 417 | */ |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 418 | int ath5k_hw_rfgain_opt_init(struct ath5k_hw *ah) |
| 419 | { |
| 420 | /* Initialize the gain optimization values */ |
| 421 | switch (ah->ah_radio) { |
| 422 | case AR5K_RF5111: |
| 423 | ah->ah_gain.g_step_idx = rfgain_opt_5111.go_default; |
| 424 | ah->ah_gain.g_low = 20; |
| 425 | ah->ah_gain.g_high = 35; |
| 426 | ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE; |
| 427 | break; |
| 428 | case AR5K_RF5112: |
| 429 | ah->ah_gain.g_step_idx = rfgain_opt_5112.go_default; |
| 430 | ah->ah_gain.g_low = 20; |
| 431 | ah->ah_gain.g_high = 85; |
| 432 | ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE; |
| 433 | break; |
| 434 | default: |
| 435 | return -EINVAL; |
| 436 | } |
| 437 | |
| 438 | return 0; |
| 439 | } |
| 440 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 441 | /** |
| 442 | * ath5k_hw_request_rfgain_probe() - Request a PAPD probe packet |
| 443 | * @ah: The &struct ath5k_hw |
| 444 | * |
| 445 | * Schedules a gain probe check on the next transmitted packet. |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 446 | * That means our next packet is going to be sent with lower |
| 447 | * tx power and a Peak to Average Power Detector (PAPD) will try |
| 448 | * to measure the gain. |
| 449 | * |
Nick Kossifidis | ce169ac | 2011-11-25 20:40:23 +0200 | [diff] [blame] | 450 | * TODO: Force a tx packet (bypassing PCU arbitrator etc) |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 451 | * just after we enable the probe so that we don't mess with |
Nick Kossifidis | ce169ac | 2011-11-25 20:40:23 +0200 | [diff] [blame] | 452 | * standard traffic. |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 453 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 454 | static void |
| 455 | ath5k_hw_request_rfgain_probe(struct ath5k_hw *ah) |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 456 | { |
| 457 | |
| 458 | /* Skip if gain calibration is inactive or |
| 459 | * we already handle a probe request */ |
| 460 | if (ah->ah_gain.g_state != AR5K_RFGAIN_ACTIVE) |
| 461 | return; |
| 462 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 463 | /* Send the packet with 2dB below max power as |
| 464 | * patent doc suggest */ |
Nick Kossifidis | a082381 | 2009-04-30 15:55:44 -0400 | [diff] [blame] | 465 | ath5k_hw_reg_write(ah, AR5K_REG_SM(ah->ah_txpower.txp_ofdm - 4, |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 466 | AR5K_PHY_PAPD_PROBE_TXPOWER) | |
| 467 | AR5K_PHY_PAPD_PROBE_TX_NEXT, AR5K_PHY_PAPD_PROBE); |
| 468 | |
| 469 | ah->ah_gain.g_state = AR5K_RFGAIN_READ_REQUESTED; |
| 470 | |
| 471 | } |
| 472 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 473 | /** |
| 474 | * ath5k_hw_rf_gainf_corr() - Calculate Gain_F measurement correction |
| 475 | * @ah: The &struct ath5k_hw |
| 476 | * |
| 477 | * Calculate Gain_F measurement correction |
| 478 | * based on the current step for RF5112 rev. 2 |
| 479 | */ |
| 480 | static u32 |
| 481 | ath5k_hw_rf_gainf_corr(struct ath5k_hw *ah) |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 482 | { |
| 483 | u32 mix, step; |
| 484 | u32 *rf; |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 485 | const struct ath5k_gain_opt *go; |
| 486 | const struct ath5k_gain_opt_step *g_step; |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 487 | const struct ath5k_rf_reg *rf_regs; |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 488 | |
| 489 | /* Only RF5112 Rev. 2 supports it */ |
| 490 | if ((ah->ah_radio != AR5K_RF5112) || |
| 491 | (ah->ah_radio_5ghz_revision <= AR5K_SREV_RAD_5112A)) |
| 492 | return 0; |
| 493 | |
| 494 | go = &rfgain_opt_5112; |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 495 | rf_regs = rf_regs_5112a; |
| 496 | ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5112a); |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 497 | |
| 498 | g_step = &go->go_step[ah->ah_gain.g_step_idx]; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 499 | |
| 500 | if (ah->ah_rf_banks == NULL) |
| 501 | return 0; |
| 502 | |
| 503 | rf = ah->ah_rf_banks; |
| 504 | ah->ah_gain.g_f_corr = 0; |
| 505 | |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 506 | /* No VGA (Variable Gain Amplifier) override, skip */ |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 507 | if (ath5k_hw_rfb_op(ah, rf_regs, 0, AR5K_RF_MIXVGA_OVR, false) != 1) |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 508 | return 0; |
| 509 | |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 510 | /* Mix gain stepping */ |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 511 | step = ath5k_hw_rfb_op(ah, rf_regs, 0, AR5K_RF_MIXGAIN_STEP, false); |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 512 | |
| 513 | /* Mix gain override */ |
| 514 | mix = g_step->gos_param[0]; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 515 | |
| 516 | switch (mix) { |
| 517 | case 3: |
| 518 | ah->ah_gain.g_f_corr = step * 2; |
| 519 | break; |
| 520 | case 2: |
| 521 | ah->ah_gain.g_f_corr = (step - 5) * 2; |
| 522 | break; |
| 523 | case 1: |
| 524 | ah->ah_gain.g_f_corr = step; |
| 525 | break; |
| 526 | default: |
| 527 | ah->ah_gain.g_f_corr = 0; |
| 528 | break; |
| 529 | } |
| 530 | |
| 531 | return ah->ah_gain.g_f_corr; |
| 532 | } |
| 533 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 534 | /** |
| 535 | * ath5k_hw_rf_check_gainf_readback() - Validate Gain_F feedback from detector |
| 536 | * @ah: The &struct ath5k_hw |
| 537 | * |
| 538 | * Check if current gain_F measurement is in the range of our |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 539 | * power detector windows. If we get a measurement outside range |
| 540 | * we know it's not accurate (detectors can't measure anything outside |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 541 | * their detection window) so we must ignore it. |
| 542 | * |
| 543 | * Returns true if readback was O.K. or false on failure |
| 544 | */ |
| 545 | static bool |
| 546 | ath5k_hw_rf_check_gainf_readback(struct ath5k_hw *ah) |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 547 | { |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 548 | const struct ath5k_rf_reg *rf_regs; |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 549 | u32 step, mix_ovr, level[4]; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 550 | u32 *rf; |
| 551 | |
| 552 | if (ah->ah_rf_banks == NULL) |
| 553 | return false; |
| 554 | |
| 555 | rf = ah->ah_rf_banks; |
| 556 | |
| 557 | if (ah->ah_radio == AR5K_RF5111) { |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 558 | |
| 559 | rf_regs = rf_regs_5111; |
| 560 | ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5111); |
| 561 | |
| 562 | step = ath5k_hw_rfb_op(ah, rf_regs, 0, AR5K_RF_RFGAIN_STEP, |
| 563 | false); |
| 564 | |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 565 | level[0] = 0; |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 566 | level[1] = (step == 63) ? 50 : step + 4; |
| 567 | level[2] = (step != 63) ? 64 : level[0]; |
Pavel Roskin | e4bbf2f | 2011-07-07 18:14:13 -0400 | [diff] [blame] | 568 | level[3] = level[2] + 50; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 569 | |
| 570 | ah->ah_gain.g_high = level[3] - |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 571 | (step == 63 ? AR5K_GAIN_DYN_ADJUST_HI_MARGIN : -5); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 572 | ah->ah_gain.g_low = level[0] + |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 573 | (step == 63 ? AR5K_GAIN_DYN_ADJUST_LO_MARGIN : 0); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 574 | } else { |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 575 | |
| 576 | rf_regs = rf_regs_5112; |
| 577 | ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5112); |
| 578 | |
| 579 | mix_ovr = ath5k_hw_rfb_op(ah, rf_regs, 0, AR5K_RF_MIXVGA_OVR, |
| 580 | false); |
| 581 | |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 582 | level[0] = level[2] = 0; |
| 583 | |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 584 | if (mix_ovr == 1) { |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 585 | level[1] = level[3] = 83; |
| 586 | } else { |
| 587 | level[1] = level[3] = 107; |
| 588 | ah->ah_gain.g_high = 55; |
| 589 | } |
| 590 | } |
| 591 | |
| 592 | return (ah->ah_gain.g_current >= level[0] && |
| 593 | ah->ah_gain.g_current <= level[1]) || |
| 594 | (ah->ah_gain.g_current >= level[2] && |
| 595 | ah->ah_gain.g_current <= level[3]); |
| 596 | } |
| 597 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 598 | /** |
| 599 | * ath5k_hw_rf_gainf_adjust() - Perform Gain_F adjustment |
| 600 | * @ah: The &struct ath5k_hw |
| 601 | * |
| 602 | * Choose the right target gain based on current gain |
| 603 | * and RF gain optimization ladder |
| 604 | */ |
| 605 | static s8 |
| 606 | ath5k_hw_rf_gainf_adjust(struct ath5k_hw *ah) |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 607 | { |
| 608 | const struct ath5k_gain_opt *go; |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 609 | const struct ath5k_gain_opt_step *g_step; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 610 | int ret = 0; |
| 611 | |
| 612 | switch (ah->ah_radio) { |
| 613 | case AR5K_RF5111: |
| 614 | go = &rfgain_opt_5111; |
| 615 | break; |
| 616 | case AR5K_RF5112: |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 617 | go = &rfgain_opt_5112; |
| 618 | break; |
| 619 | default: |
| 620 | return 0; |
| 621 | } |
| 622 | |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 623 | g_step = &go->go_step[ah->ah_gain.g_step_idx]; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 624 | |
| 625 | if (ah->ah_gain.g_current >= ah->ah_gain.g_high) { |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 626 | |
| 627 | /* Reached maximum */ |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 628 | if (ah->ah_gain.g_step_idx == 0) |
| 629 | return -1; |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 630 | |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 631 | for (ah->ah_gain.g_target = ah->ah_gain.g_current; |
| 632 | ah->ah_gain.g_target >= ah->ah_gain.g_high && |
| 633 | ah->ah_gain.g_step_idx > 0; |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 634 | g_step = &go->go_step[ah->ah_gain.g_step_idx]) |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 635 | ah->ah_gain.g_target -= 2 * |
| 636 | (go->go_step[--(ah->ah_gain.g_step_idx)].gos_gain - |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 637 | g_step->gos_gain); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 638 | |
| 639 | ret = 1; |
| 640 | goto done; |
| 641 | } |
| 642 | |
| 643 | if (ah->ah_gain.g_current <= ah->ah_gain.g_low) { |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 644 | |
| 645 | /* Reached minimum */ |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 646 | if (ah->ah_gain.g_step_idx == (go->go_steps_count - 1)) |
| 647 | return -2; |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 648 | |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 649 | for (ah->ah_gain.g_target = ah->ah_gain.g_current; |
| 650 | ah->ah_gain.g_target <= ah->ah_gain.g_low && |
Pavel Roskin | e4bbf2f | 2011-07-07 18:14:13 -0400 | [diff] [blame] | 651 | ah->ah_gain.g_step_idx < go->go_steps_count - 1; |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 652 | g_step = &go->go_step[ah->ah_gain.g_step_idx]) |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 653 | ah->ah_gain.g_target -= 2 * |
| 654 | (go->go_step[++ah->ah_gain.g_step_idx].gos_gain - |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 655 | g_step->gos_gain); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 656 | |
| 657 | ret = 2; |
| 658 | goto done; |
| 659 | } |
| 660 | |
| 661 | done: |
Pavel Roskin | e0d687b | 2011-07-14 20:21:55 -0400 | [diff] [blame] | 662 | ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE, |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 663 | "ret %d, gain step %u, current gain %u, target gain %u\n", |
| 664 | ret, ah->ah_gain.g_step_idx, ah->ah_gain.g_current, |
| 665 | ah->ah_gain.g_target); |
| 666 | |
| 667 | return ret; |
| 668 | } |
| 669 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 670 | /** |
| 671 | * ath5k_hw_gainf_calibrate() - Do a gain_F calibration |
| 672 | * @ah: The &struct ath5k_hw |
| 673 | * |
| 674 | * Main callback for thermal RF gain calibration engine |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 675 | * Check for a new gain reading and schedule an adjustment |
| 676 | * if needed. |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 677 | * |
| 678 | * Returns one of enum ath5k_rfgain codes |
Nick Kossifidis | ce169ac | 2011-11-25 20:40:23 +0200 | [diff] [blame] | 679 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 680 | enum ath5k_rfgain |
| 681 | ath5k_hw_gainf_calibrate(struct ath5k_hw *ah) |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 682 | { |
| 683 | u32 data, type; |
| 684 | struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom; |
| 685 | |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 686 | if (ah->ah_rf_banks == NULL || |
| 687 | ah->ah_gain.g_state == AR5K_RFGAIN_INACTIVE) |
| 688 | return AR5K_RFGAIN_INACTIVE; |
| 689 | |
| 690 | /* No check requested, either engine is inactive |
| 691 | * or an adjustment is already requested */ |
| 692 | if (ah->ah_gain.g_state != AR5K_RFGAIN_READ_REQUESTED) |
| 693 | goto done; |
| 694 | |
| 695 | /* Read the PAPD (Peak to Average Power Detector) |
| 696 | * register */ |
| 697 | data = ath5k_hw_reg_read(ah, AR5K_PHY_PAPD_PROBE); |
| 698 | |
| 699 | /* No probe is scheduled, read gain_F measurement */ |
| 700 | if (!(data & AR5K_PHY_PAPD_PROBE_TX_NEXT)) { |
| 701 | ah->ah_gain.g_current = data >> AR5K_PHY_PAPD_PROBE_GAINF_S; |
| 702 | type = AR5K_REG_MS(data, AR5K_PHY_PAPD_PROBE_TYPE); |
| 703 | |
| 704 | /* If tx packet is CCK correct the gain_F measurement |
| 705 | * by cck ofdm gain delta */ |
| 706 | if (type == AR5K_PHY_PAPD_PROBE_TYPE_CCK) { |
| 707 | if (ah->ah_radio_5ghz_revision >= AR5K_SREV_RAD_5112A) |
| 708 | ah->ah_gain.g_current += |
| 709 | ee->ee_cck_ofdm_gain_delta; |
| 710 | else |
| 711 | ah->ah_gain.g_current += |
| 712 | AR5K_GAIN_CCK_PROBE_CORR; |
| 713 | } |
| 714 | |
| 715 | /* Further correct gain_F measurement for |
| 716 | * RF5112A radios */ |
| 717 | if (ah->ah_radio_5ghz_revision >= AR5K_SREV_RAD_5112A) { |
| 718 | ath5k_hw_rf_gainf_corr(ah); |
| 719 | ah->ah_gain.g_current = |
| 720 | ah->ah_gain.g_current >= ah->ah_gain.g_f_corr ? |
Pavel Roskin | e4bbf2f | 2011-07-07 18:14:13 -0400 | [diff] [blame] | 721 | (ah->ah_gain.g_current - ah->ah_gain.g_f_corr) : |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 722 | 0; |
| 723 | } |
| 724 | |
| 725 | /* Check if measurement is ok and if we need |
| 726 | * to adjust gain, schedule a gain adjustment, |
Pavel Roskin | 6a2a0e7 | 2011-07-09 00:17:51 -0400 | [diff] [blame] | 727 | * else switch back to the active state */ |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 728 | if (ath5k_hw_rf_check_gainf_readback(ah) && |
| 729 | AR5K_GAIN_CHECK_ADJUST(&ah->ah_gain) && |
| 730 | ath5k_hw_rf_gainf_adjust(ah)) { |
| 731 | ah->ah_gain.g_state = AR5K_RFGAIN_NEED_CHANGE; |
| 732 | } else { |
| 733 | ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE; |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | done: |
| 738 | return ah->ah_gain.g_state; |
| 739 | } |
| 740 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 741 | /** |
| 742 | * ath5k_hw_rfgain_init() - Write initial RF gain settings to hw |
| 743 | * @ah: The &struct ath5k_hw |
| 744 | * @band: One of enum ieee80211_band |
| 745 | * |
| 746 | * Write initial RF gain table to set the RF sensitivity. |
| 747 | * |
| 748 | * NOTE: This one works on all RF chips and has nothing to do |
| 749 | * with Gain_F calibration |
| 750 | */ |
| 751 | static int |
| 752 | ath5k_hw_rfgain_init(struct ath5k_hw *ah, enum ieee80211_band band) |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 753 | { |
| 754 | const struct ath5k_ini_rfgain *ath5k_rfg; |
Bruno Randolf | 26a51ad | 2010-12-21 17:30:37 +0900 | [diff] [blame] | 755 | unsigned int i, size, index; |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 756 | |
| 757 | switch (ah->ah_radio) { |
| 758 | case AR5K_RF5111: |
| 759 | ath5k_rfg = rfgain_5111; |
| 760 | size = ARRAY_SIZE(rfgain_5111); |
| 761 | break; |
| 762 | case AR5K_RF5112: |
| 763 | ath5k_rfg = rfgain_5112; |
| 764 | size = ARRAY_SIZE(rfgain_5112); |
| 765 | break; |
| 766 | case AR5K_RF2413: |
| 767 | ath5k_rfg = rfgain_2413; |
| 768 | size = ARRAY_SIZE(rfgain_2413); |
| 769 | break; |
| 770 | case AR5K_RF2316: |
| 771 | ath5k_rfg = rfgain_2316; |
| 772 | size = ARRAY_SIZE(rfgain_2316); |
| 773 | break; |
| 774 | case AR5K_RF5413: |
| 775 | ath5k_rfg = rfgain_5413; |
| 776 | size = ARRAY_SIZE(rfgain_5413); |
| 777 | break; |
| 778 | case AR5K_RF2317: |
| 779 | case AR5K_RF2425: |
| 780 | ath5k_rfg = rfgain_2425; |
| 781 | size = ARRAY_SIZE(rfgain_2425); |
| 782 | break; |
| 783 | default: |
| 784 | return -EINVAL; |
| 785 | } |
| 786 | |
Bruno Randolf | 26a51ad | 2010-12-21 17:30:37 +0900 | [diff] [blame] | 787 | index = (band == IEEE80211_BAND_2GHZ) ? 1 : 0; |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 788 | |
| 789 | for (i = 0; i < size; i++) { |
| 790 | AR5K_REG_WAIT(i); |
Bruno Randolf | 26a51ad | 2010-12-21 17:30:37 +0900 | [diff] [blame] | 791 | ath5k_hw_reg_write(ah, ath5k_rfg[i].rfg_value[index], |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 792 | (u32)ath5k_rfg[i].rfg_register); |
| 793 | } |
| 794 | |
| 795 | return 0; |
| 796 | } |
| 797 | |
| 798 | |
Nick Kossifidis | 6f3b414 | 2009-02-09 06:03:41 +0200 | [diff] [blame] | 799 | /********************\ |
| 800 | * RF Registers setup * |
| 801 | \********************/ |
| 802 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 803 | /** |
| 804 | * ath5k_hw_rfregs_init() - Initialize RF register settings |
| 805 | * @ah: The &struct ath5k_hw |
| 806 | * @channel: The &struct ieee80211_channel |
| 807 | * @mode: One of enum ath5k_driver_mode |
| 808 | * |
| 809 | * Setup RF registers by writing RF buffer on hw. For |
| 810 | * more infos on this, check out rfbuffer.h |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 811 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 812 | static int |
| 813 | ath5k_hw_rfregs_init(struct ath5k_hw *ah, |
| 814 | struct ieee80211_channel *channel, |
| 815 | unsigned int mode) |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 816 | { |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 817 | const struct ath5k_rf_reg *rf_regs; |
| 818 | const struct ath5k_ini_rfbuffer *ini_rfb; |
| 819 | const struct ath5k_gain_opt *go = NULL; |
| 820 | const struct ath5k_gain_opt_step *g_step; |
| 821 | struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom; |
| 822 | u8 ee_mode = 0; |
| 823 | u32 *rfb; |
| 824 | int i, obdb = -1, bank = -1; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 825 | |
| 826 | switch (ah->ah_radio) { |
| 827 | case AR5K_RF5111: |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 828 | rf_regs = rf_regs_5111; |
| 829 | ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5111); |
| 830 | ini_rfb = rfb_5111; |
| 831 | ah->ah_rf_banks_size = ARRAY_SIZE(rfb_5111); |
| 832 | go = &rfgain_opt_5111; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 833 | break; |
| 834 | case AR5K_RF5112: |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 835 | if (ah->ah_radio_5ghz_revision >= AR5K_SREV_RAD_5112A) { |
| 836 | rf_regs = rf_regs_5112a; |
| 837 | ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5112a); |
| 838 | ini_rfb = rfb_5112a; |
| 839 | ah->ah_rf_banks_size = ARRAY_SIZE(rfb_5112a); |
| 840 | } else { |
| 841 | rf_regs = rf_regs_5112; |
| 842 | ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5112); |
| 843 | ini_rfb = rfb_5112; |
| 844 | ah->ah_rf_banks_size = ARRAY_SIZE(rfb_5112); |
| 845 | } |
| 846 | go = &rfgain_opt_5112; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 847 | break; |
Nick Kossifidis | f714dd6 | 2008-02-28 14:43:51 -0500 | [diff] [blame] | 848 | case AR5K_RF2413: |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 849 | rf_regs = rf_regs_2413; |
| 850 | ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_2413); |
| 851 | ini_rfb = rfb_2413; |
| 852 | ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2413); |
| 853 | break; |
| 854 | case AR5K_RF2316: |
| 855 | rf_regs = rf_regs_2316; |
| 856 | ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_2316); |
| 857 | ini_rfb = rfb_2316; |
| 858 | ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2316); |
| 859 | break; |
| 860 | case AR5K_RF5413: |
| 861 | rf_regs = rf_regs_5413; |
| 862 | ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_5413); |
| 863 | ini_rfb = rfb_5413; |
| 864 | ah->ah_rf_banks_size = ARRAY_SIZE(rfb_5413); |
| 865 | break; |
| 866 | case AR5K_RF2317: |
| 867 | rf_regs = rf_regs_2425; |
| 868 | ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_2425); |
| 869 | ini_rfb = rfb_2317; |
| 870 | ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2317); |
Nick Kossifidis | f714dd6 | 2008-02-28 14:43:51 -0500 | [diff] [blame] | 871 | break; |
Nick Kossifidis | 136bfc7 | 2008-04-16 18:42:48 +0300 | [diff] [blame] | 872 | case AR5K_RF2425: |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 873 | rf_regs = rf_regs_2425; |
| 874 | ah->ah_rf_regs_count = ARRAY_SIZE(rf_regs_2425); |
| 875 | if (ah->ah_mac_srev < AR5K_SREV_AR2417) { |
| 876 | ini_rfb = rfb_2425; |
| 877 | ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2425); |
| 878 | } else { |
| 879 | ini_rfb = rfb_2417; |
| 880 | ah->ah_rf_banks_size = ARRAY_SIZE(rfb_2417); |
| 881 | } |
Nick Kossifidis | 136bfc7 | 2008-04-16 18:42:48 +0300 | [diff] [blame] | 882 | break; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 883 | default: |
| 884 | return -EINVAL; |
| 885 | } |
| 886 | |
Bob Copeland | a180a13 | 2010-08-15 13:03:12 -0400 | [diff] [blame] | 887 | /* If it's the first time we set RF buffer, allocate |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 888 | * ah->ah_rf_banks based on ah->ah_rf_banks_size |
| 889 | * we set above */ |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 890 | if (ah->ah_rf_banks == NULL) { |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 891 | ah->ah_rf_banks = kmalloc(sizeof(u32) * ah->ah_rf_banks_size, |
| 892 | GFP_KERNEL); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 893 | if (ah->ah_rf_banks == NULL) { |
Pavel Roskin | e0d687b | 2011-07-14 20:21:55 -0400 | [diff] [blame] | 894 | ATH5K_ERR(ah, "out of memory\n"); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 895 | return -ENOMEM; |
| 896 | } |
| 897 | } |
| 898 | |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 899 | /* Copy values to modify them */ |
| 900 | rfb = ah->ah_rf_banks; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 901 | |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 902 | for (i = 0; i < ah->ah_rf_banks_size; i++) { |
| 903 | if (ini_rfb[i].rfb_bank >= AR5K_MAX_RF_BANKS) { |
Pavel Roskin | e0d687b | 2011-07-14 20:21:55 -0400 | [diff] [blame] | 904 | ATH5K_ERR(ah, "invalid bank\n"); |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 905 | return -EINVAL; |
| 906 | } |
| 907 | |
| 908 | /* Bank changed, write down the offset */ |
| 909 | if (bank != ini_rfb[i].rfb_bank) { |
| 910 | bank = ini_rfb[i].rfb_bank; |
| 911 | ah->ah_offset[bank] = i; |
| 912 | } |
| 913 | |
| 914 | rfb[i] = ini_rfb[i].rfb_mode_data[mode]; |
| 915 | } |
| 916 | |
| 917 | /* Set Output and Driver bias current (OB/DB) */ |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 918 | if (channel->band == IEEE80211_BAND_2GHZ) { |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 919 | |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 920 | if (channel->hw_value == AR5K_MODE_11B) |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 921 | ee_mode = AR5K_EEPROM_MODE_11B; |
| 922 | else |
| 923 | ee_mode = AR5K_EEPROM_MODE_11G; |
| 924 | |
| 925 | /* For RF511X/RF211X combination we |
| 926 | * use b_OB and b_DB parameters stored |
| 927 | * in eeprom on ee->ee_ob[ee_mode][0] |
| 928 | * |
Pavel Roskin | 6a2a0e7 | 2011-07-09 00:17:51 -0400 | [diff] [blame] | 929 | * For all other chips we use OB/DB for 2GHz |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 930 | * stored in the b/g modal section just like |
| 931 | * 802.11a on ee->ee_ob[ee_mode][1] */ |
| 932 | if ((ah->ah_radio == AR5K_RF5111) || |
| 933 | (ah->ah_radio == AR5K_RF5112)) |
| 934 | obdb = 0; |
| 935 | else |
| 936 | obdb = 1; |
| 937 | |
| 938 | ath5k_hw_rfb_op(ah, rf_regs, ee->ee_ob[ee_mode][obdb], |
| 939 | AR5K_RF_OB_2GHZ, true); |
| 940 | |
| 941 | ath5k_hw_rfb_op(ah, rf_regs, ee->ee_db[ee_mode][obdb], |
| 942 | AR5K_RF_DB_2GHZ, true); |
| 943 | |
| 944 | /* RF5111 always needs OB/DB for 5GHz, even if we use 2GHz */ |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 945 | } else if ((channel->band == IEEE80211_BAND_5GHZ) || |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 946 | (ah->ah_radio == AR5K_RF5111)) { |
| 947 | |
| 948 | /* For 11a, Turbo and XR we need to choose |
| 949 | * OB/DB based on frequency range */ |
| 950 | ee_mode = AR5K_EEPROM_MODE_11A; |
| 951 | obdb = channel->center_freq >= 5725 ? 3 : |
| 952 | (channel->center_freq >= 5500 ? 2 : |
| 953 | (channel->center_freq >= 5260 ? 1 : |
| 954 | (channel->center_freq > 4000 ? 0 : -1))); |
| 955 | |
| 956 | if (obdb < 0) |
| 957 | return -EINVAL; |
| 958 | |
| 959 | ath5k_hw_rfb_op(ah, rf_regs, ee->ee_ob[ee_mode][obdb], |
| 960 | AR5K_RF_OB_5GHZ, true); |
| 961 | |
| 962 | ath5k_hw_rfb_op(ah, rf_regs, ee->ee_db[ee_mode][obdb], |
| 963 | AR5K_RF_DB_5GHZ, true); |
| 964 | } |
| 965 | |
| 966 | g_step = &go->go_step[ah->ah_gain.g_step_idx]; |
| 967 | |
Nick Kossifidis | 4352fab | 2010-11-23 21:53:28 +0200 | [diff] [blame] | 968 | /* Set turbo mode (N/A on RF5413) */ |
| 969 | if ((ah->ah_bwmode == AR5K_BWMODE_40MHZ) && |
| 970 | (ah->ah_radio != AR5K_RF5413)) |
| 971 | ath5k_hw_rfb_op(ah, rf_regs, 1, AR5K_RF_TURBO, false); |
| 972 | |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 973 | /* Bank Modifications (chip-specific) */ |
| 974 | if (ah->ah_radio == AR5K_RF5111) { |
| 975 | |
| 976 | /* Set gain_F settings according to current step */ |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 977 | if (channel->hw_value != AR5K_MODE_11B) { |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 978 | |
| 979 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_FRAME_CTL, |
| 980 | AR5K_PHY_FRAME_CTL_TX_CLIP, |
| 981 | g_step->gos_param[0]); |
| 982 | |
| 983 | ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[1], |
| 984 | AR5K_RF_PWD_90, true); |
| 985 | |
| 986 | ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[2], |
| 987 | AR5K_RF_PWD_84, true); |
| 988 | |
| 989 | ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[3], |
| 990 | AR5K_RF_RFGAIN_SEL, true); |
| 991 | |
| 992 | /* We programmed gain_F parameters, switch back |
| 993 | * to active state */ |
| 994 | ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE; |
| 995 | |
| 996 | } |
| 997 | |
| 998 | /* Bank 6/7 setup */ |
| 999 | |
| 1000 | ath5k_hw_rfb_op(ah, rf_regs, !ee->ee_xpd[ee_mode], |
| 1001 | AR5K_RF_PWD_XPD, true); |
| 1002 | |
| 1003 | ath5k_hw_rfb_op(ah, rf_regs, ee->ee_x_gain[ee_mode], |
| 1004 | AR5K_RF_XPD_GAIN, true); |
| 1005 | |
| 1006 | ath5k_hw_rfb_op(ah, rf_regs, ee->ee_i_gain[ee_mode], |
| 1007 | AR5K_RF_GAIN_I, true); |
| 1008 | |
| 1009 | ath5k_hw_rfb_op(ah, rf_regs, ee->ee_xpd[ee_mode], |
| 1010 | AR5K_RF_PLO_SEL, true); |
| 1011 | |
Nick Kossifidis | b2b4c69 | 2010-11-23 21:26:13 +0200 | [diff] [blame] | 1012 | /* Tweak power detectors for half/quarter rate support */ |
| 1013 | if (ah->ah_bwmode == AR5K_BWMODE_5MHZ || |
| 1014 | ah->ah_bwmode == AR5K_BWMODE_10MHZ) { |
| 1015 | u8 wait_i; |
| 1016 | |
| 1017 | ath5k_hw_rfb_op(ah, rf_regs, 0x1f, |
| 1018 | AR5K_RF_WAIT_S, true); |
| 1019 | |
| 1020 | wait_i = (ah->ah_bwmode == AR5K_BWMODE_5MHZ) ? |
| 1021 | 0x1f : 0x10; |
| 1022 | |
| 1023 | ath5k_hw_rfb_op(ah, rf_regs, wait_i, |
| 1024 | AR5K_RF_WAIT_I, true); |
| 1025 | ath5k_hw_rfb_op(ah, rf_regs, 3, |
| 1026 | AR5K_RF_MAX_TIME, true); |
| 1027 | |
| 1028 | } |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 1029 | } |
| 1030 | |
| 1031 | if (ah->ah_radio == AR5K_RF5112) { |
| 1032 | |
| 1033 | /* Set gain_F settings according to current step */ |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 1034 | if (channel->hw_value != AR5K_MODE_11B) { |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 1035 | |
| 1036 | ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[0], |
| 1037 | AR5K_RF_MIXGAIN_OVR, true); |
| 1038 | |
| 1039 | ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[1], |
| 1040 | AR5K_RF_PWD_138, true); |
| 1041 | |
| 1042 | ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[2], |
| 1043 | AR5K_RF_PWD_137, true); |
| 1044 | |
| 1045 | ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[3], |
| 1046 | AR5K_RF_PWD_136, true); |
| 1047 | |
| 1048 | ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[4], |
| 1049 | AR5K_RF_PWD_132, true); |
| 1050 | |
| 1051 | ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[5], |
| 1052 | AR5K_RF_PWD_131, true); |
| 1053 | |
| 1054 | ath5k_hw_rfb_op(ah, rf_regs, g_step->gos_param[6], |
| 1055 | AR5K_RF_PWD_130, true); |
| 1056 | |
| 1057 | /* We programmed gain_F parameters, switch back |
| 1058 | * to active state */ |
| 1059 | ah->ah_gain.g_state = AR5K_RFGAIN_ACTIVE; |
| 1060 | } |
| 1061 | |
| 1062 | /* Bank 6/7 setup */ |
| 1063 | |
| 1064 | ath5k_hw_rfb_op(ah, rf_regs, ee->ee_xpd[ee_mode], |
| 1065 | AR5K_RF_XPD_SEL, true); |
| 1066 | |
| 1067 | if (ah->ah_radio_5ghz_revision < AR5K_SREV_RAD_5112A) { |
| 1068 | /* Rev. 1 supports only one xpd */ |
| 1069 | ath5k_hw_rfb_op(ah, rf_regs, |
| 1070 | ee->ee_x_gain[ee_mode], |
| 1071 | AR5K_RF_XPD_GAIN, true); |
| 1072 | |
| 1073 | } else { |
Nick Kossifidis | d1cb0bd | 2009-08-10 03:27:59 +0300 | [diff] [blame] | 1074 | u8 *pdg_curve_to_idx = ee->ee_pdc_to_idx[ee_mode]; |
| 1075 | if (ee->ee_pd_gains[ee_mode] > 1) { |
| 1076 | ath5k_hw_rfb_op(ah, rf_regs, |
| 1077 | pdg_curve_to_idx[0], |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 1078 | AR5K_RF_PD_GAIN_LO, true); |
Nick Kossifidis | d1cb0bd | 2009-08-10 03:27:59 +0300 | [diff] [blame] | 1079 | ath5k_hw_rfb_op(ah, rf_regs, |
| 1080 | pdg_curve_to_idx[1], |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 1081 | AR5K_RF_PD_GAIN_HI, true); |
Nick Kossifidis | d1cb0bd | 2009-08-10 03:27:59 +0300 | [diff] [blame] | 1082 | } else { |
| 1083 | ath5k_hw_rfb_op(ah, rf_regs, |
| 1084 | pdg_curve_to_idx[0], |
| 1085 | AR5K_RF_PD_GAIN_LO, true); |
| 1086 | ath5k_hw_rfb_op(ah, rf_regs, |
| 1087 | pdg_curve_to_idx[0], |
| 1088 | AR5K_RF_PD_GAIN_HI, true); |
| 1089 | } |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 1090 | |
| 1091 | /* Lower synth voltage on Rev 2 */ |
Felix Fietkau | ca8bfd9 | 2011-07-12 09:01:59 +0800 | [diff] [blame] | 1092 | if (ah->ah_radio == AR5K_RF5112 && |
| 1093 | (ah->ah_radio_5ghz_revision & AR5K_SREV_REV) > 0) { |
| 1094 | ath5k_hw_rfb_op(ah, rf_regs, 2, |
| 1095 | AR5K_RF_HIGH_VC_CP, true); |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 1096 | |
Felix Fietkau | ca8bfd9 | 2011-07-12 09:01:59 +0800 | [diff] [blame] | 1097 | ath5k_hw_rfb_op(ah, rf_regs, 2, |
| 1098 | AR5K_RF_MID_VC_CP, true); |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 1099 | |
Felix Fietkau | ca8bfd9 | 2011-07-12 09:01:59 +0800 | [diff] [blame] | 1100 | ath5k_hw_rfb_op(ah, rf_regs, 2, |
| 1101 | AR5K_RF_LOW_VC_CP, true); |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 1102 | |
Felix Fietkau | ca8bfd9 | 2011-07-12 09:01:59 +0800 | [diff] [blame] | 1103 | ath5k_hw_rfb_op(ah, rf_regs, 2, |
| 1104 | AR5K_RF_PUSH_UP, true); |
| 1105 | } |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 1106 | |
| 1107 | /* Decrease power consumption on 5213+ BaseBand */ |
| 1108 | if (ah->ah_phy_revision >= AR5K_SREV_PHY_5212A) { |
| 1109 | ath5k_hw_rfb_op(ah, rf_regs, 1, |
| 1110 | AR5K_RF_PAD2GND, true); |
| 1111 | |
| 1112 | ath5k_hw_rfb_op(ah, rf_regs, 1, |
| 1113 | AR5K_RF_XB2_LVL, true); |
| 1114 | |
| 1115 | ath5k_hw_rfb_op(ah, rf_regs, 1, |
| 1116 | AR5K_RF_XB5_LVL, true); |
| 1117 | |
| 1118 | ath5k_hw_rfb_op(ah, rf_regs, 1, |
| 1119 | AR5K_RF_PWD_167, true); |
| 1120 | |
| 1121 | ath5k_hw_rfb_op(ah, rf_regs, 1, |
| 1122 | AR5K_RF_PWD_166, true); |
| 1123 | } |
| 1124 | } |
| 1125 | |
| 1126 | ath5k_hw_rfb_op(ah, rf_regs, ee->ee_i_gain[ee_mode], |
| 1127 | AR5K_RF_GAIN_I, true); |
| 1128 | |
Nick Kossifidis | b2b4c69 | 2010-11-23 21:26:13 +0200 | [diff] [blame] | 1129 | /* Tweak power detector for half/quarter rates */ |
| 1130 | if (ah->ah_bwmode == AR5K_BWMODE_5MHZ || |
| 1131 | ah->ah_bwmode == AR5K_BWMODE_10MHZ) { |
| 1132 | u8 pd_delay; |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 1133 | |
Nick Kossifidis | b2b4c69 | 2010-11-23 21:26:13 +0200 | [diff] [blame] | 1134 | pd_delay = (ah->ah_bwmode == AR5K_BWMODE_5MHZ) ? |
| 1135 | 0xf : 0x8; |
| 1136 | |
| 1137 | ath5k_hw_rfb_op(ah, rf_regs, pd_delay, |
| 1138 | AR5K_RF_PD_PERIOD_A, true); |
| 1139 | ath5k_hw_rfb_op(ah, rf_regs, 0xf, |
| 1140 | AR5K_RF_PD_DELAY_A, true); |
| 1141 | |
| 1142 | } |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 1143 | } |
| 1144 | |
| 1145 | if (ah->ah_radio == AR5K_RF5413 && |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 1146 | channel->band == IEEE80211_BAND_2GHZ) { |
Nick Kossifidis | 8892e4e | 2009-02-09 06:06:34 +0200 | [diff] [blame] | 1147 | |
| 1148 | ath5k_hw_rfb_op(ah, rf_regs, 1, AR5K_RF_DERBY_CHAN_SEL_MODE, |
| 1149 | true); |
| 1150 | |
| 1151 | /* Set optimum value for early revisions (on pci-e chips) */ |
| 1152 | if (ah->ah_mac_srev >= AR5K_SREV_AR5424 && |
| 1153 | ah->ah_mac_srev < AR5K_SREV_AR5413) |
| 1154 | ath5k_hw_rfb_op(ah, rf_regs, ath5k_hw_bitswap(6, 3), |
| 1155 | AR5K_RF_PWD_ICLOBUF_2G, true); |
| 1156 | |
| 1157 | } |
| 1158 | |
| 1159 | /* Write RF banks on hw */ |
| 1160 | for (i = 0; i < ah->ah_rf_banks_size; i++) { |
| 1161 | AR5K_REG_WAIT(i); |
| 1162 | ath5k_hw_reg_write(ah, rfb[i], ini_rfb[i].rfb_ctrl_register); |
| 1163 | } |
| 1164 | |
| 1165 | return 0; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1166 | } |
| 1167 | |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1168 | |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1169 | /**************************\ |
| 1170 | PHY/RF channel functions |
| 1171 | \**************************/ |
| 1172 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1173 | /** |
| 1174 | * ath5k_hw_rf5110_chan2athchan() - Convert channel freq on RF5110 |
| 1175 | * @channel: The &struct ieee80211_channel |
| 1176 | * |
| 1177 | * Map channel frequency to IEEE channel number and convert it |
| 1178 | * to an internal channel value used by the RF5110 chipset. |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1179 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1180 | static u32 |
| 1181 | ath5k_hw_rf5110_chan2athchan(struct ieee80211_channel *channel) |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1182 | { |
| 1183 | u32 athchan; |
| 1184 | |
Luis R. Rodriguez | 400ec45 | 2008-02-03 21:51:49 -0500 | [diff] [blame] | 1185 | athchan = (ath5k_hw_bitswap( |
| 1186 | (ieee80211_frequency_to_channel( |
| 1187 | channel->center_freq) - 24) / 2, 5) |
| 1188 | << 1) | (1 << 6) | 0x1; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1189 | return athchan; |
| 1190 | } |
| 1191 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1192 | /** |
| 1193 | * ath5k_hw_rf5110_channel() - Set channel frequency on RF5110 |
| 1194 | * @ah: The &struct ath5k_hw |
| 1195 | * @channel: The &struct ieee80211_channel |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1196 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1197 | static int |
| 1198 | ath5k_hw_rf5110_channel(struct ath5k_hw *ah, |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1199 | struct ieee80211_channel *channel) |
| 1200 | { |
| 1201 | u32 data; |
| 1202 | |
| 1203 | /* |
| 1204 | * Set the channel and wait |
| 1205 | */ |
| 1206 | data = ath5k_hw_rf5110_chan2athchan(channel); |
| 1207 | ath5k_hw_reg_write(ah, data, AR5K_RF_BUFFER); |
| 1208 | ath5k_hw_reg_write(ah, 0, AR5K_RF_BUFFER_CONTROL_0); |
Nick Kossifidis | 1846ac3 | 2011-11-25 20:40:24 +0200 | [diff] [blame] | 1209 | usleep_range(1000, 1500); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1210 | |
| 1211 | return 0; |
| 1212 | } |
| 1213 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1214 | /** |
| 1215 | * ath5k_hw_rf5111_chan2athchan() - Handle 2GHz channels on RF5111/2111 |
| 1216 | * @ieee: IEEE channel number |
| 1217 | * @athchan: The &struct ath5k_athchan_2ghz |
| 1218 | * |
| 1219 | * In order to enable the RF2111 frequency converter on RF5111/2111 setups |
| 1220 | * we need to add some offsets and extra flags to the data values we pass |
| 1221 | * on to the PHY. So for every 2GHz channel this function gets called |
| 1222 | * to do the conversion. |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1223 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1224 | static int |
| 1225 | ath5k_hw_rf5111_chan2athchan(unsigned int ieee, |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1226 | struct ath5k_athchan_2ghz *athchan) |
| 1227 | { |
| 1228 | int channel; |
| 1229 | |
| 1230 | /* Cast this value to catch negative channel numbers (>= -19) */ |
| 1231 | channel = (int)ieee; |
| 1232 | |
| 1233 | /* |
| 1234 | * Map 2GHz IEEE channel to 5GHz Atheros channel |
| 1235 | */ |
| 1236 | if (channel <= 13) { |
| 1237 | athchan->a2_athchan = 115 + channel; |
| 1238 | athchan->a2_flags = 0x46; |
| 1239 | } else if (channel == 14) { |
| 1240 | athchan->a2_athchan = 124; |
| 1241 | athchan->a2_flags = 0x44; |
| 1242 | } else if (channel >= 15 && channel <= 26) { |
| 1243 | athchan->a2_athchan = ((channel - 14) * 4) + 132; |
| 1244 | athchan->a2_flags = 0x46; |
| 1245 | } else |
| 1246 | return -EINVAL; |
| 1247 | |
| 1248 | return 0; |
| 1249 | } |
| 1250 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1251 | /** |
| 1252 | * ath5k_hw_rf5111_channel() - Set channel frequency on RF5111/2111 |
| 1253 | * @ah: The &struct ath5k_hw |
| 1254 | * @channel: The &struct ieee80211_channel |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1255 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1256 | static int |
| 1257 | ath5k_hw_rf5111_channel(struct ath5k_hw *ah, |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1258 | struct ieee80211_channel *channel) |
| 1259 | { |
| 1260 | struct ath5k_athchan_2ghz ath5k_channel_2ghz; |
Luis R. Rodriguez | 400ec45 | 2008-02-03 21:51:49 -0500 | [diff] [blame] | 1261 | unsigned int ath5k_channel = |
| 1262 | ieee80211_frequency_to_channel(channel->center_freq); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1263 | u32 data0, data1, clock; |
| 1264 | int ret; |
| 1265 | |
| 1266 | /* |
| 1267 | * Set the channel on the RF5111 radio |
| 1268 | */ |
| 1269 | data0 = data1 = 0; |
| 1270 | |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 1271 | if (channel->band == IEEE80211_BAND_2GHZ) { |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1272 | /* Map 2GHz channel to 5GHz Atheros channel ID */ |
Luis R. Rodriguez | 400ec45 | 2008-02-03 21:51:49 -0500 | [diff] [blame] | 1273 | ret = ath5k_hw_rf5111_chan2athchan( |
| 1274 | ieee80211_frequency_to_channel(channel->center_freq), |
| 1275 | &ath5k_channel_2ghz); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1276 | if (ret) |
| 1277 | return ret; |
| 1278 | |
| 1279 | ath5k_channel = ath5k_channel_2ghz.a2_athchan; |
| 1280 | data0 = ((ath5k_hw_bitswap(ath5k_channel_2ghz.a2_flags, 8) & 0xff) |
| 1281 | << 5) | (1 << 4); |
| 1282 | } |
| 1283 | |
| 1284 | if (ath5k_channel < 145 || !(ath5k_channel & 1)) { |
| 1285 | clock = 1; |
| 1286 | data1 = ((ath5k_hw_bitswap(ath5k_channel - 24, 8) & 0xff) << 2) | |
| 1287 | (clock << 1) | (1 << 10) | 1; |
| 1288 | } else { |
| 1289 | clock = 0; |
| 1290 | data1 = ((ath5k_hw_bitswap((ath5k_channel - 24) / 2, 8) & 0xff) |
| 1291 | << 2) | (clock << 1) | (1 << 10) | 1; |
| 1292 | } |
| 1293 | |
| 1294 | ath5k_hw_reg_write(ah, (data1 & 0xff) | ((data0 & 0xff) << 8), |
| 1295 | AR5K_RF_BUFFER); |
| 1296 | ath5k_hw_reg_write(ah, ((data1 >> 8) & 0xff) | (data0 & 0xff00), |
| 1297 | AR5K_RF_BUFFER_CONTROL_3); |
| 1298 | |
| 1299 | return 0; |
| 1300 | } |
| 1301 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1302 | /** |
| 1303 | * ath5k_hw_rf5112_channel() - Set channel frequency on 5112 and newer |
| 1304 | * @ah: The &struct ath5k_hw |
| 1305 | * @channel: The &struct ieee80211_channel |
| 1306 | * |
| 1307 | * On RF5112/2112 and newer we don't need to do any conversion. |
| 1308 | * We pass the frequency value after a few modifications to the |
| 1309 | * chip directly. |
| 1310 | * |
| 1311 | * NOTE: Make sure channel frequency given is within our range or else |
| 1312 | * we might damage the chip ! Use ath5k_channel_ok before calling this one. |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1313 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1314 | static int |
| 1315 | ath5k_hw_rf5112_channel(struct ath5k_hw *ah, |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1316 | struct ieee80211_channel *channel) |
| 1317 | { |
| 1318 | u32 data, data0, data1, data2; |
| 1319 | u16 c; |
| 1320 | |
| 1321 | data = data0 = data1 = data2 = 0; |
Luis R. Rodriguez | d8ee398 | 2008-02-03 21:51:04 -0500 | [diff] [blame] | 1322 | c = channel->center_freq; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1323 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1324 | /* My guess based on code: |
| 1325 | * 2GHz RF has 2 synth modes, one with a Local Oscillator |
| 1326 | * at 2224Hz and one with a LO at 2192Hz. IF is 1520Hz |
| 1327 | * (3040/2). data0 is used to set the PLL divider and data1 |
| 1328 | * selects synth mode. */ |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1329 | if (c < 4800) { |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1330 | /* Channel 14 and all frequencies with 2Hz spacing |
| 1331 | * below/above (non-standard channels) */ |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1332 | if (!((c - 2224) % 5)) { |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1333 | /* Same as (c - 2224) / 5 */ |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1334 | data0 = ((2 * (c - 704)) - 3040) / 10; |
| 1335 | data1 = 1; |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1336 | /* Channel 1 and all frequencies with 5Hz spacing |
| 1337 | * below/above (standard channels without channel 14) */ |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1338 | } else if (!((c - 2192) % 5)) { |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1339 | /* Same as (c - 2192) / 5 */ |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1340 | data0 = ((2 * (c - 672)) - 3040) / 10; |
| 1341 | data1 = 0; |
| 1342 | } else |
| 1343 | return -EINVAL; |
| 1344 | |
| 1345 | data0 = ath5k_hw_bitswap((data0 << 2) & 0xff, 8); |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1346 | /* This is more complex, we have a single synthesizer with |
| 1347 | * 4 reference clock settings (?) based on frequency spacing |
| 1348 | * and set using data2. LO is at 4800Hz and data0 is again used |
| 1349 | * to set some divider. |
| 1350 | * |
| 1351 | * NOTE: There is an old atheros presentation at Stanford |
| 1352 | * that mentions a method called dual direct conversion |
| 1353 | * with 1GHz sliding IF for RF5110. Maybe that's what we |
| 1354 | * have here, or an updated version. */ |
Bob Copeland | 1968cc7 | 2010-04-07 23:55:56 -0400 | [diff] [blame] | 1355 | } else if ((c % 5) != 2 || c > 5435) { |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1356 | if (!(c % 20) && c >= 5120) { |
| 1357 | data0 = ath5k_hw_bitswap(((c - 4800) / 20 << 2), 8); |
| 1358 | data2 = ath5k_hw_bitswap(3, 2); |
| 1359 | } else if (!(c % 10)) { |
| 1360 | data0 = ath5k_hw_bitswap(((c - 4800) / 10 << 1), 8); |
| 1361 | data2 = ath5k_hw_bitswap(2, 2); |
| 1362 | } else if (!(c % 5)) { |
| 1363 | data0 = ath5k_hw_bitswap((c - 4800) / 5, 8); |
| 1364 | data2 = ath5k_hw_bitswap(1, 2); |
| 1365 | } else |
| 1366 | return -EINVAL; |
Nick Kossifidis | cc6323c | 2008-07-20 06:44:43 +0300 | [diff] [blame] | 1367 | } else { |
Bob Copeland | 1968cc7 | 2010-04-07 23:55:56 -0400 | [diff] [blame] | 1368 | data0 = ath5k_hw_bitswap((10 * (c - 2 - 4800)) / 25 + 1, 8); |
Nick Kossifidis | cc6323c | 2008-07-20 06:44:43 +0300 | [diff] [blame] | 1369 | data2 = ath5k_hw_bitswap(0, 2); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1370 | } |
| 1371 | |
| 1372 | data = (data0 << 4) | (data1 << 1) | (data2 << 2) | 0x1001; |
| 1373 | |
| 1374 | ath5k_hw_reg_write(ah, data & 0xff, AR5K_RF_BUFFER); |
| 1375 | ath5k_hw_reg_write(ah, (data >> 8) & 0x7f, AR5K_RF_BUFFER_CONTROL_5); |
| 1376 | |
| 1377 | return 0; |
| 1378 | } |
| 1379 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1380 | /** |
| 1381 | * ath5k_hw_rf2425_channel() - Set channel frequency on RF2425 |
| 1382 | * @ah: The &struct ath5k_hw |
| 1383 | * @channel: The &struct ieee80211_channel |
| 1384 | * |
| 1385 | * AR2425/2417 have a different 2GHz RF so code changes |
| 1386 | * a little bit from RF5112. |
Nick Kossifidis | cc6323c | 2008-07-20 06:44:43 +0300 | [diff] [blame] | 1387 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1388 | static int |
| 1389 | ath5k_hw_rf2425_channel(struct ath5k_hw *ah, |
Nick Kossifidis | cc6323c | 2008-07-20 06:44:43 +0300 | [diff] [blame] | 1390 | struct ieee80211_channel *channel) |
| 1391 | { |
| 1392 | u32 data, data0, data2; |
| 1393 | u16 c; |
| 1394 | |
| 1395 | data = data0 = data2 = 0; |
| 1396 | c = channel->center_freq; |
| 1397 | |
| 1398 | if (c < 4800) { |
| 1399 | data0 = ath5k_hw_bitswap((c - 2272), 8); |
| 1400 | data2 = 0; |
| 1401 | /* ? 5GHz ? */ |
Bob Copeland | 1968cc7 | 2010-04-07 23:55:56 -0400 | [diff] [blame] | 1402 | } else if ((c % 5) != 2 || c > 5435) { |
Nick Kossifidis | cc6323c | 2008-07-20 06:44:43 +0300 | [diff] [blame] | 1403 | if (!(c % 20) && c < 5120) |
| 1404 | data0 = ath5k_hw_bitswap(((c - 4800) / 20 << 2), 8); |
| 1405 | else if (!(c % 10)) |
| 1406 | data0 = ath5k_hw_bitswap(((c - 4800) / 10 << 1), 8); |
| 1407 | else if (!(c % 5)) |
| 1408 | data0 = ath5k_hw_bitswap((c - 4800) / 5, 8); |
| 1409 | else |
| 1410 | return -EINVAL; |
| 1411 | data2 = ath5k_hw_bitswap(1, 2); |
| 1412 | } else { |
Bob Copeland | 1968cc7 | 2010-04-07 23:55:56 -0400 | [diff] [blame] | 1413 | data0 = ath5k_hw_bitswap((10 * (c - 2 - 4800)) / 25 + 1, 8); |
Nick Kossifidis | cc6323c | 2008-07-20 06:44:43 +0300 | [diff] [blame] | 1414 | data2 = ath5k_hw_bitswap(0, 2); |
| 1415 | } |
| 1416 | |
| 1417 | data = (data0 << 4) | data2 << 2 | 0x1001; |
| 1418 | |
| 1419 | ath5k_hw_reg_write(ah, data & 0xff, AR5K_RF_BUFFER); |
| 1420 | ath5k_hw_reg_write(ah, (data >> 8) & 0x7f, AR5K_RF_BUFFER_CONTROL_5); |
| 1421 | |
| 1422 | return 0; |
| 1423 | } |
| 1424 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1425 | /** |
| 1426 | * ath5k_hw_channel() - Set a channel on the radio chip |
| 1427 | * @ah: The &struct ath5k_hw |
| 1428 | * @channel: The &struct ieee80211_channel |
| 1429 | * |
| 1430 | * This is the main function called to set a channel on the |
| 1431 | * radio chip based on the radio chip version. |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1432 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1433 | static int |
| 1434 | ath5k_hw_channel(struct ath5k_hw *ah, |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 1435 | struct ieee80211_channel *channel) |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1436 | { |
| 1437 | int ret; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1438 | /* |
Pavel Roskin | 6a2a0e7 | 2011-07-09 00:17:51 -0400 | [diff] [blame] | 1439 | * Check bounds supported by the PHY (we don't care about regulatory |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 1440 | * restrictions at this point). |
| 1441 | */ |
| 1442 | if (!ath5k_channel_ok(ah, channel)) { |
Pavel Roskin | e0d687b | 2011-07-14 20:21:55 -0400 | [diff] [blame] | 1443 | ATH5K_ERR(ah, |
Luis R. Rodriguez | 400ec45 | 2008-02-03 21:51:49 -0500 | [diff] [blame] | 1444 | "channel frequency (%u MHz) out of supported " |
| 1445 | "band range\n", |
Luis R. Rodriguez | d8ee398 | 2008-02-03 21:51:04 -0500 | [diff] [blame] | 1446 | channel->center_freq); |
Luis R. Rodriguez | 400ec45 | 2008-02-03 21:51:49 -0500 | [diff] [blame] | 1447 | return -EINVAL; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1448 | } |
| 1449 | |
| 1450 | /* |
| 1451 | * Set the channel and wait |
| 1452 | */ |
| 1453 | switch (ah->ah_radio) { |
| 1454 | case AR5K_RF5110: |
| 1455 | ret = ath5k_hw_rf5110_channel(ah, channel); |
| 1456 | break; |
| 1457 | case AR5K_RF5111: |
| 1458 | ret = ath5k_hw_rf5111_channel(ah, channel); |
| 1459 | break; |
Nikolay Ledovskikh | 28bec7b | 2011-02-18 19:59:53 +0300 | [diff] [blame] | 1460 | case AR5K_RF2317: |
Nick Kossifidis | cc6323c | 2008-07-20 06:44:43 +0300 | [diff] [blame] | 1461 | case AR5K_RF2425: |
| 1462 | ret = ath5k_hw_rf2425_channel(ah, channel); |
| 1463 | break; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1464 | default: |
| 1465 | ret = ath5k_hw_rf5112_channel(ah, channel); |
| 1466 | break; |
| 1467 | } |
| 1468 | |
| 1469 | if (ret) |
| 1470 | return ret; |
| 1471 | |
Nick Kossifidis | cc6323c | 2008-07-20 06:44:43 +0300 | [diff] [blame] | 1472 | /* Set JAPAN setting for channel 14 */ |
| 1473 | if (channel->center_freq == 2484) { |
| 1474 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_CCKTXCTL, |
| 1475 | AR5K_PHY_CCKTXCTL_JAPAN); |
| 1476 | } else { |
| 1477 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_CCKTXCTL, |
| 1478 | AR5K_PHY_CCKTXCTL_WORLD); |
| 1479 | } |
| 1480 | |
Bob Copeland | 46026e8 | 2009-06-10 22:22:20 -0400 | [diff] [blame] | 1481 | ah->ah_current_channel = channel; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1482 | |
| 1483 | return 0; |
| 1484 | } |
| 1485 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1486 | |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1487 | /*****************\ |
| 1488 | PHY calibration |
| 1489 | \*****************/ |
| 1490 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1491 | /** |
| 1492 | * DOC: PHY Calibration routines |
| 1493 | * |
| 1494 | * Noise floor calibration: When we tell the hardware to |
| 1495 | * perform a noise floor calibration by setting the |
| 1496 | * AR5K_PHY_AGCCTL_NF bit on AR5K_PHY_AGCCTL, it will periodically |
| 1497 | * sample-and-hold the minimum noise level seen at the antennas. |
| 1498 | * This value is then stored in a ring buffer of recently measured |
| 1499 | * noise floor values so we have a moving window of the last few |
| 1500 | * samples. The median of the values in the history is then loaded |
| 1501 | * into the hardware for its own use for RSSI and CCA measurements. |
| 1502 | * This type of calibration doesn't interfere with traffic. |
| 1503 | * |
| 1504 | * AGC calibration: When we tell the hardware to perform |
| 1505 | * an AGC (Automatic Gain Control) calibration by setting the |
| 1506 | * AR5K_PHY_AGCCTL_CAL, hw disconnects the antennas and does |
| 1507 | * a calibration on the DC offsets of ADCs. During this period |
| 1508 | * rx/tx gets disabled so we have to deal with it on the driver |
| 1509 | * part. |
| 1510 | * |
| 1511 | * I/Q calibration: When we tell the hardware to perform |
| 1512 | * an I/Q calibration, it tries to correct I/Q imbalance and |
| 1513 | * fix QAM constellation by sampling data from rxed frames. |
| 1514 | * It doesn't interfere with traffic. |
| 1515 | * |
| 1516 | * For more infos on AGC and I/Q calibration check out patent doc |
| 1517 | * #03/094463. |
| 1518 | */ |
| 1519 | |
| 1520 | /** |
| 1521 | * ath5k_hw_read_measured_noise_floor() - Read measured NF from hw |
| 1522 | * @ah: The &struct ath5k_hw |
| 1523 | */ |
| 1524 | static s32 |
| 1525 | ath5k_hw_read_measured_noise_floor(struct ath5k_hw *ah) |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1526 | { |
| 1527 | s32 val; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1528 | |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1529 | val = ath5k_hw_reg_read(ah, AR5K_PHY_NF); |
Andreas Herrmann | 7919a57 | 2010-08-30 19:04:01 +0000 | [diff] [blame] | 1530 | return sign_extend32(AR5K_REG_MS(val, AR5K_PHY_NF_MINCCA_PWR), 8); |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1531 | } |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1532 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1533 | /** |
| 1534 | * ath5k_hw_init_nfcal_hist() - Initialize NF calibration history buffer |
| 1535 | * @ah: The &struct ath5k_hw |
| 1536 | */ |
| 1537 | void |
| 1538 | ath5k_hw_init_nfcal_hist(struct ath5k_hw *ah) |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1539 | { |
| 1540 | int i; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1541 | |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1542 | ah->ah_nfcal_hist.index = 0; |
| 1543 | for (i = 0; i < ATH5K_NF_CAL_HIST_MAX; i++) |
| 1544 | ah->ah_nfcal_hist.nfval[i] = AR5K_TUNE_CCA_MAX_GOOD_VALUE; |
| 1545 | } |
| 1546 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1547 | /** |
| 1548 | * ath5k_hw_update_nfcal_hist() - Update NF calibration history buffer |
| 1549 | * @ah: The &struct ath5k_hw |
| 1550 | * @noise_floor: The NF we got from hw |
| 1551 | */ |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1552 | static void ath5k_hw_update_nfcal_hist(struct ath5k_hw *ah, s16 noise_floor) |
| 1553 | { |
| 1554 | struct ath5k_nfcal_hist *hist = &ah->ah_nfcal_hist; |
Pavel Roskin | e4bbf2f | 2011-07-07 18:14:13 -0400 | [diff] [blame] | 1555 | hist->index = (hist->index + 1) & (ATH5K_NF_CAL_HIST_MAX - 1); |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1556 | hist->nfval[hist->index] = noise_floor; |
| 1557 | } |
| 1558 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1559 | /** |
| 1560 | * ath5k_hw_get_median_noise_floor() - Get median NF from history buffer |
| 1561 | * @ah: The &struct ath5k_hw |
| 1562 | */ |
| 1563 | static s16 |
| 1564 | ath5k_hw_get_median_noise_floor(struct ath5k_hw *ah) |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1565 | { |
| 1566 | s16 sort[ATH5K_NF_CAL_HIST_MAX]; |
| 1567 | s16 tmp; |
| 1568 | int i, j; |
| 1569 | |
| 1570 | memcpy(sort, ah->ah_nfcal_hist.nfval, sizeof(sort)); |
| 1571 | for (i = 0; i < ATH5K_NF_CAL_HIST_MAX - 1; i++) { |
| 1572 | for (j = 1; j < ATH5K_NF_CAL_HIST_MAX - i; j++) { |
Pavel Roskin | e4bbf2f | 2011-07-07 18:14:13 -0400 | [diff] [blame] | 1573 | if (sort[j] > sort[j - 1]) { |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1574 | tmp = sort[j]; |
Pavel Roskin | e4bbf2f | 2011-07-07 18:14:13 -0400 | [diff] [blame] | 1575 | sort[j] = sort[j - 1]; |
| 1576 | sort[j - 1] = tmp; |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1577 | } |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1578 | } |
| 1579 | } |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1580 | for (i = 0; i < ATH5K_NF_CAL_HIST_MAX; i++) { |
Pavel Roskin | e0d687b | 2011-07-14 20:21:55 -0400 | [diff] [blame] | 1581 | ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE, |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1582 | "cal %d:%d\n", i, sort[i]); |
| 1583 | } |
Pavel Roskin | e4bbf2f | 2011-07-07 18:14:13 -0400 | [diff] [blame] | 1584 | return sort[(ATH5K_NF_CAL_HIST_MAX - 1) / 2]; |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1585 | } |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1586 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1587 | /** |
| 1588 | * ath5k_hw_update_noise_floor() - Update NF on hardware |
| 1589 | * @ah: The &struct ath5k_hw |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1590 | * |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1591 | * This is the main function we call to perform a NF calibration, |
| 1592 | * it reads NF from hardware, calculates the median and updates |
| 1593 | * NF on hw. |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1594 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1595 | void |
| 1596 | ath5k_hw_update_noise_floor(struct ath5k_hw *ah) |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1597 | { |
| 1598 | struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom; |
| 1599 | u32 val; |
| 1600 | s16 nf, threshold; |
| 1601 | u8 ee_mode; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1602 | |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1603 | /* keep last value if calibration hasn't completed */ |
| 1604 | if (ath5k_hw_reg_read(ah, AR5K_PHY_AGCCTL) & AR5K_PHY_AGCCTL_NF) { |
Pavel Roskin | e0d687b | 2011-07-14 20:21:55 -0400 | [diff] [blame] | 1605 | ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE, |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1606 | "NF did not complete in calibration window\n"); |
| 1607 | |
| 1608 | return; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1609 | } |
| 1610 | |
Nick Kossifidis | ce169ac | 2011-11-25 20:40:23 +0200 | [diff] [blame] | 1611 | ah->ah_cal_mask |= AR5K_CALIBRATION_NF; |
| 1612 | |
Bruno Randolf | 0207c0c | 2010-12-21 17:30:43 +0900 | [diff] [blame] | 1613 | ee_mode = ath5k_eeprom_mode_from_channel(ah->ah_current_channel); |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1614 | |
| 1615 | /* completed NF calibration, test threshold */ |
| 1616 | nf = ath5k_hw_read_measured_noise_floor(ah); |
| 1617 | threshold = ee->ee_noise_floor_thr[ee_mode]; |
| 1618 | |
| 1619 | if (nf > threshold) { |
Pavel Roskin | e0d687b | 2011-07-14 20:21:55 -0400 | [diff] [blame] | 1620 | ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE, |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1621 | "noise floor failure detected; " |
| 1622 | "read %d, threshold %d\n", |
| 1623 | nf, threshold); |
| 1624 | |
| 1625 | nf = AR5K_TUNE_CCA_MAX_GOOD_VALUE; |
| 1626 | } |
| 1627 | |
| 1628 | ath5k_hw_update_nfcal_hist(ah, nf); |
| 1629 | nf = ath5k_hw_get_median_noise_floor(ah); |
| 1630 | |
| 1631 | /* load noise floor (in .5 dBm) so the hardware will use it */ |
| 1632 | val = ath5k_hw_reg_read(ah, AR5K_PHY_NF) & ~AR5K_PHY_NF_M; |
| 1633 | val |= (nf * 2) & AR5K_PHY_NF_M; |
| 1634 | ath5k_hw_reg_write(ah, val, AR5K_PHY_NF); |
| 1635 | |
| 1636 | AR5K_REG_MASKED_BITS(ah, AR5K_PHY_AGCCTL, AR5K_PHY_AGCCTL_NF, |
| 1637 | ~(AR5K_PHY_AGCCTL_NF_EN | AR5K_PHY_AGCCTL_NF_NOUPDATE)); |
| 1638 | |
| 1639 | ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL, AR5K_PHY_AGCCTL_NF, |
| 1640 | 0, false); |
| 1641 | |
| 1642 | /* |
| 1643 | * Load a high max CCA Power value (-50 dBm in .5 dBm units) |
| 1644 | * so that we're not capped by the median we just loaded. |
| 1645 | * This will be used as the initial value for the next noise |
| 1646 | * floor calibration. |
| 1647 | */ |
| 1648 | val = (val & ~AR5K_PHY_NF_M) | ((-50 * 2) & AR5K_PHY_NF_M); |
| 1649 | ath5k_hw_reg_write(ah, val, AR5K_PHY_NF); |
| 1650 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL, |
| 1651 | AR5K_PHY_AGCCTL_NF_EN | |
| 1652 | AR5K_PHY_AGCCTL_NF_NOUPDATE | |
| 1653 | AR5K_PHY_AGCCTL_NF); |
| 1654 | |
| 1655 | ah->ah_noise_floor = nf; |
| 1656 | |
Nick Kossifidis | ce169ac | 2011-11-25 20:40:23 +0200 | [diff] [blame] | 1657 | ah->ah_cal_mask &= ~AR5K_CALIBRATION_NF; |
| 1658 | |
Pavel Roskin | e0d687b | 2011-07-14 20:21:55 -0400 | [diff] [blame] | 1659 | ATH5K_DBG(ah, ATH5K_DEBUG_CALIBRATE, |
Bob Copeland | e5e2647 | 2009-10-14 14:16:30 -0400 | [diff] [blame] | 1660 | "noise floor calibrated: %d\n", nf); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1661 | } |
| 1662 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1663 | /** |
| 1664 | * ath5k_hw_rf5110_calibrate() - Perform a PHY calibration on RF5110 |
| 1665 | * @ah: The &struct ath5k_hw |
| 1666 | * @channel: The &struct ieee80211_channel |
| 1667 | * |
| 1668 | * Do a complete PHY calibration (AGC + NF + I/Q) on RF5110 |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1669 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1670 | static int |
| 1671 | ath5k_hw_rf5110_calibrate(struct ath5k_hw *ah, |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1672 | struct ieee80211_channel *channel) |
| 1673 | { |
| 1674 | u32 phy_sig, phy_agc, phy_sat, beacon; |
| 1675 | int ret; |
| 1676 | |
| 1677 | /* |
| 1678 | * Disable beacons and RX/TX queues, wait |
| 1679 | */ |
| 1680 | AR5K_REG_ENABLE_BITS(ah, AR5K_DIAG_SW_5210, |
Bruno Randolf | eada7ca | 2010-09-27 13:02:40 +0900 | [diff] [blame] | 1681 | AR5K_DIAG_SW_DIS_TX_5210 | AR5K_DIAG_SW_DIS_RX_5210); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1682 | beacon = ath5k_hw_reg_read(ah, AR5K_BEACON_5210); |
| 1683 | ath5k_hw_reg_write(ah, beacon & ~AR5K_BEACON_ENABLE, AR5K_BEACON_5210); |
| 1684 | |
Nick Kossifidis | 1846ac3 | 2011-11-25 20:40:24 +0200 | [diff] [blame] | 1685 | usleep_range(2000, 2500); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1686 | |
| 1687 | /* |
| 1688 | * Set the channel (with AGC turned off) |
| 1689 | */ |
| 1690 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE); |
| 1691 | udelay(10); |
| 1692 | ret = ath5k_hw_channel(ah, channel); |
| 1693 | |
| 1694 | /* |
| 1695 | * Activate PHY and wait |
| 1696 | */ |
| 1697 | ath5k_hw_reg_write(ah, AR5K_PHY_ACT_ENABLE, AR5K_PHY_ACT); |
Nick Kossifidis | 1846ac3 | 2011-11-25 20:40:24 +0200 | [diff] [blame] | 1698 | usleep_range(1000, 1500); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1699 | |
| 1700 | AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE); |
| 1701 | |
| 1702 | if (ret) |
| 1703 | return ret; |
| 1704 | |
| 1705 | /* |
| 1706 | * Calibrate the radio chip |
| 1707 | */ |
| 1708 | |
| 1709 | /* Remember normal state */ |
| 1710 | phy_sig = ath5k_hw_reg_read(ah, AR5K_PHY_SIG); |
| 1711 | phy_agc = ath5k_hw_reg_read(ah, AR5K_PHY_AGCCOARSE); |
| 1712 | phy_sat = ath5k_hw_reg_read(ah, AR5K_PHY_ADCSAT); |
| 1713 | |
| 1714 | /* Update radio registers */ |
| 1715 | ath5k_hw_reg_write(ah, (phy_sig & ~(AR5K_PHY_SIG_FIRPWR)) | |
| 1716 | AR5K_REG_SM(-1, AR5K_PHY_SIG_FIRPWR), AR5K_PHY_SIG); |
| 1717 | |
| 1718 | ath5k_hw_reg_write(ah, (phy_agc & ~(AR5K_PHY_AGCCOARSE_HI | |
| 1719 | AR5K_PHY_AGCCOARSE_LO)) | |
| 1720 | AR5K_REG_SM(-1, AR5K_PHY_AGCCOARSE_HI) | |
| 1721 | AR5K_REG_SM(-127, AR5K_PHY_AGCCOARSE_LO), AR5K_PHY_AGCCOARSE); |
| 1722 | |
| 1723 | ath5k_hw_reg_write(ah, (phy_sat & ~(AR5K_PHY_ADCSAT_ICNT | |
| 1724 | AR5K_PHY_ADCSAT_THR)) | |
| 1725 | AR5K_REG_SM(2, AR5K_PHY_ADCSAT_ICNT) | |
| 1726 | AR5K_REG_SM(12, AR5K_PHY_ADCSAT_THR), AR5K_PHY_ADCSAT); |
| 1727 | |
| 1728 | udelay(20); |
| 1729 | |
| 1730 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE); |
| 1731 | udelay(10); |
| 1732 | ath5k_hw_reg_write(ah, AR5K_PHY_RFSTG_DISABLE, AR5K_PHY_RFSTG); |
| 1733 | AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGC, AR5K_PHY_AGC_DISABLE); |
| 1734 | |
Nick Kossifidis | 1846ac3 | 2011-11-25 20:40:24 +0200 | [diff] [blame] | 1735 | usleep_range(1000, 1500); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1736 | |
| 1737 | /* |
| 1738 | * Enable calibration and wait until completion |
| 1739 | */ |
| 1740 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL, AR5K_PHY_AGCCTL_CAL); |
| 1741 | |
| 1742 | ret = ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL, |
| 1743 | AR5K_PHY_AGCCTL_CAL, 0, false); |
| 1744 | |
| 1745 | /* Reset to normal state */ |
| 1746 | ath5k_hw_reg_write(ah, phy_sig, AR5K_PHY_SIG); |
| 1747 | ath5k_hw_reg_write(ah, phy_agc, AR5K_PHY_AGCCOARSE); |
| 1748 | ath5k_hw_reg_write(ah, phy_sat, AR5K_PHY_ADCSAT); |
| 1749 | |
| 1750 | if (ret) { |
Pavel Roskin | e0d687b | 2011-07-14 20:21:55 -0400 | [diff] [blame] | 1751 | ATH5K_ERR(ah, "calibration timeout (%uMHz)\n", |
Luis R. Rodriguez | d8ee398 | 2008-02-03 21:51:04 -0500 | [diff] [blame] | 1752 | channel->center_freq); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1753 | return ret; |
| 1754 | } |
| 1755 | |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1756 | /* |
| 1757 | * Re-enable RX/TX and beacons |
| 1758 | */ |
| 1759 | AR5K_REG_DISABLE_BITS(ah, AR5K_DIAG_SW_5210, |
Bruno Randolf | eada7ca | 2010-09-27 13:02:40 +0900 | [diff] [blame] | 1760 | AR5K_DIAG_SW_DIS_TX_5210 | AR5K_DIAG_SW_DIS_RX_5210); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1761 | ath5k_hw_reg_write(ah, beacon, AR5K_BEACON_5210); |
| 1762 | |
| 1763 | return 0; |
| 1764 | } |
| 1765 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1766 | /** |
| 1767 | * ath5k_hw_rf511x_iq_calibrate() - Perform I/Q calibration on RF5111 and newer |
| 1768 | * @ah: The &struct ath5k_hw |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1769 | */ |
Bruno Randolf | 9e04a7e | 2010-05-19 10:31:00 +0900 | [diff] [blame] | 1770 | static int |
| 1771 | ath5k_hw_rf511x_iq_calibrate(struct ath5k_hw *ah) |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1772 | { |
| 1773 | u32 i_pwr, q_pwr; |
| 1774 | s32 iq_corr, i_coff, i_coffd, q_coff, q_coffd; |
Nick Kossifidis | f860ee2 | 2008-07-20 06:47:12 +0300 | [diff] [blame] | 1775 | int i; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1776 | |
Nick Kossifidis | ce169ac | 2011-11-25 20:40:23 +0200 | [diff] [blame] | 1777 | /* Skip if I/Q calibration is not needed or if it's still running */ |
| 1778 | if (!ah->ah_iq_cal_needed) |
| 1779 | return -EINVAL; |
| 1780 | else if (ath5k_hw_reg_read(ah, AR5K_PHY_IQ) & AR5K_PHY_IQ_RUN) { |
| 1781 | ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_CALIBRATE, |
| 1782 | "I/Q calibration still running"); |
| 1783 | return -EBUSY; |
| 1784 | } |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1785 | |
Nick Kossifidis | f860ee2 | 2008-07-20 06:47:12 +0300 | [diff] [blame] | 1786 | /* Calibration has finished, get the results and re-run */ |
Nick Kossifidis | ce169ac | 2011-11-25 20:40:23 +0200 | [diff] [blame] | 1787 | |
| 1788 | /* Work around for empty results which can apparently happen on 5212: |
| 1789 | * Read registers up to 10 times until we get both i_pr and q_pwr */ |
Nick Kossifidis | f860ee2 | 2008-07-20 06:47:12 +0300 | [diff] [blame] | 1790 | for (i = 0; i <= 10; i++) { |
| 1791 | iq_corr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_CORR); |
| 1792 | i_pwr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_PWR_I); |
| 1793 | q_pwr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_PWR_Q); |
Pavel Roskin | e0d687b | 2011-07-14 20:21:55 -0400 | [diff] [blame] | 1794 | ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_CALIBRATE, |
Bruno Randolf | 86415d4 | 2010-03-09 16:56:05 +0900 | [diff] [blame] | 1795 | "iq_corr:%x i_pwr:%x q_pwr:%x", iq_corr, i_pwr, q_pwr); |
| 1796 | if (i_pwr && q_pwr) |
| 1797 | break; |
Nick Kossifidis | f860ee2 | 2008-07-20 06:47:12 +0300 | [diff] [blame] | 1798 | } |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1799 | |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1800 | i_coffd = ((i_pwr >> 1) + (q_pwr >> 1)) >> 7; |
Bruno Randolf | 49a85d2 | 2010-03-09 16:56:15 +0900 | [diff] [blame] | 1801 | |
| 1802 | if (ah->ah_version == AR5K_AR5211) |
| 1803 | q_coffd = q_pwr >> 6; |
| 1804 | else |
| 1805 | q_coffd = q_pwr >> 7; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1806 | |
Nick Kossifidis | ce169ac | 2011-11-25 20:40:23 +0200 | [diff] [blame] | 1807 | /* In case i_coffd became zero, cancel calibration |
| 1808 | * not only it's too small, it'll also result a divide |
| 1809 | * by zero later on. */ |
Bruno Randolf | 86415d4 | 2010-03-09 16:56:05 +0900 | [diff] [blame] | 1810 | if (i_coffd == 0 || q_coffd < 2) |
Nick Kossifidis | ce169ac | 2011-11-25 20:40:23 +0200 | [diff] [blame] | 1811 | return -ECANCELED; |
| 1812 | |
| 1813 | /* Protect against loss of sign bits */ |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1814 | |
Bruno Randolf | 86415d4 | 2010-03-09 16:56:05 +0900 | [diff] [blame] | 1815 | i_coff = (-iq_corr) / i_coffd; |
| 1816 | i_coff = clamp(i_coff, -32, 31); /* signed 6 bit */ |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1817 | |
John W. Linville | ace5d5d | 2010-04-08 16:34:49 -0400 | [diff] [blame] | 1818 | if (ah->ah_version == AR5K_AR5211) |
| 1819 | q_coff = (i_pwr / q_coffd) - 64; |
| 1820 | else |
| 1821 | q_coff = (i_pwr / q_coffd) - 128; |
Bruno Randolf | 86415d4 | 2010-03-09 16:56:05 +0900 | [diff] [blame] | 1822 | q_coff = clamp(q_coff, -16, 15); /* signed 5 bit */ |
Nick Kossifidis | f860ee2 | 2008-07-20 06:47:12 +0300 | [diff] [blame] | 1823 | |
Pavel Roskin | e0d687b | 2011-07-14 20:21:55 -0400 | [diff] [blame] | 1824 | ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_CALIBRATE, |
Bruno Randolf | 86415d4 | 2010-03-09 16:56:05 +0900 | [diff] [blame] | 1825 | "new I:%d Q:%d (i_coffd:%x q_coffd:%x)", |
| 1826 | i_coff, q_coff, i_coffd, q_coffd); |
Nick Kossifidis | f860ee2 | 2008-07-20 06:47:12 +0300 | [diff] [blame] | 1827 | |
Bruno Randolf | 86415d4 | 2010-03-09 16:56:05 +0900 | [diff] [blame] | 1828 | /* Commit new I/Q values (set enable bit last to match HAL sources) */ |
| 1829 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_I_COFF, i_coff); |
| 1830 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_Q_Q_COFF, q_coff); |
| 1831 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_CORR_ENABLE); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1832 | |
Nick Kossifidis | f860ee2 | 2008-07-20 06:47:12 +0300 | [diff] [blame] | 1833 | /* Re-enable calibration -if we don't we'll commit |
| 1834 | * the same values again and again */ |
| 1835 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, |
| 1836 | AR5K_PHY_IQ_CAL_NUM_LOG_MAX, 15); |
| 1837 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_RUN); |
| 1838 | |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1839 | return 0; |
| 1840 | } |
| 1841 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1842 | /** |
| 1843 | * ath5k_hw_phy_calibrate() - Perform a PHY calibration |
| 1844 | * @ah: The &struct ath5k_hw |
| 1845 | * @channel: The &struct ieee80211_channel |
| 1846 | * |
| 1847 | * The main function we call from above to perform |
| 1848 | * a short or full PHY calibration based on RF chip |
| 1849 | * and current channel |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1850 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1851 | int |
| 1852 | ath5k_hw_phy_calibrate(struct ath5k_hw *ah, |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1853 | struct ieee80211_channel *channel) |
| 1854 | { |
| 1855 | int ret; |
| 1856 | |
| 1857 | if (ah->ah_radio == AR5K_RF5110) |
Felix Fietkau | b613c72 | 2011-07-12 09:01:58 +0800 | [diff] [blame] | 1858 | return ath5k_hw_rf5110_calibrate(ah, channel); |
| 1859 | |
| 1860 | ret = ath5k_hw_rf511x_iq_calibrate(ah); |
Nick Kossifidis | ce169ac | 2011-11-25 20:40:23 +0200 | [diff] [blame] | 1861 | if (ret) { |
| 1862 | ATH5K_DBG_UNLIMIT(ah, ATH5K_DEBUG_CALIBRATE, |
| 1863 | "No I/Q correction performed (%uMHz)\n", |
| 1864 | channel->center_freq); |
Felix Fietkau | b613c72 | 2011-07-12 09:01:58 +0800 | [diff] [blame] | 1865 | |
Nick Kossifidis | ce169ac | 2011-11-25 20:40:23 +0200 | [diff] [blame] | 1866 | /* Happens all the time if there is not much |
| 1867 | * traffic, consider it normal behaviour. */ |
| 1868 | ret = 0; |
| 1869 | } |
| 1870 | |
| 1871 | /* On full calibration do an AGC calibration and |
| 1872 | * request a PAPD probe for gainf calibration if |
| 1873 | * needed */ |
| 1874 | if (ah->ah_cal_mask & AR5K_CALIBRATION_FULL) { |
| 1875 | |
| 1876 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL, |
| 1877 | AR5K_PHY_AGCCTL_CAL); |
| 1878 | |
| 1879 | ret = ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL, |
| 1880 | AR5K_PHY_AGCCTL_CAL | AR5K_PHY_AGCCTL_NF, |
| 1881 | 0, false); |
| 1882 | if (ret) { |
| 1883 | ATH5K_ERR(ah, |
| 1884 | "gain calibration timeout (%uMHz)\n", |
| 1885 | channel->center_freq); |
| 1886 | } |
| 1887 | |
| 1888 | if ((ah->ah_radio == AR5K_RF5111 || |
| 1889 | ah->ah_radio == AR5K_RF5112) |
| 1890 | && (channel->hw_value != AR5K_MODE_11B)) |
| 1891 | ath5k_hw_request_rfgain_probe(ah); |
| 1892 | } |
| 1893 | |
| 1894 | /* Update noise floor |
| 1895 | * XXX: Only do this after AGC calibration */ |
| 1896 | if (!(ah->ah_cal_mask & AR5K_CALIBRATION_NF)) |
| 1897 | ath5k_hw_update_noise_floor(ah); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 1898 | |
| 1899 | return ret; |
| 1900 | } |
| 1901 | |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 1902 | |
Nick Kossifidis | 57e6c56 | 2009-04-30 15:55:50 -0400 | [diff] [blame] | 1903 | /***************************\ |
| 1904 | * Spur mitigation functions * |
| 1905 | \***************************/ |
| 1906 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 1907 | /** |
| 1908 | * ath5k_hw_set_spur_mitigation_filter() - Configure SPUR filter |
| 1909 | * @ah: The &struct ath5k_hw |
| 1910 | * @channel: The &struct ieee80211_channel |
| 1911 | * |
| 1912 | * This function gets called during PHY initialization to |
| 1913 | * configure the spur filter for the given channel. Spur is noise |
| 1914 | * generated due to "reflection" effects, for more information on this |
| 1915 | * method check out patent US7643810 |
| 1916 | */ |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 1917 | static void |
Nick Kossifidis | 57e6c56 | 2009-04-30 15:55:50 -0400 | [diff] [blame] | 1918 | ath5k_hw_set_spur_mitigation_filter(struct ath5k_hw *ah, |
| 1919 | struct ieee80211_channel *channel) |
| 1920 | { |
| 1921 | struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom; |
| 1922 | u32 mag_mask[4] = {0, 0, 0, 0}; |
| 1923 | u32 pilot_mask[2] = {0, 0}; |
| 1924 | /* Note: fbin values are scaled up by 2 */ |
| 1925 | u16 spur_chan_fbin, chan_fbin, symbol_width, spur_detection_window; |
| 1926 | s32 spur_delta_phase, spur_freq_sigma_delta; |
| 1927 | s32 spur_offset, num_symbols_x16; |
| 1928 | u8 num_symbol_offsets, i, freq_band; |
| 1929 | |
| 1930 | /* Convert current frequency to fbin value (the same way channels |
| 1931 | * are stored on EEPROM, check out ath5k_eeprom_bin2freq) and scale |
| 1932 | * up by 2 so we can compare it later */ |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 1933 | if (channel->band == IEEE80211_BAND_2GHZ) { |
Nick Kossifidis | 57e6c56 | 2009-04-30 15:55:50 -0400 | [diff] [blame] | 1934 | chan_fbin = (channel->center_freq - 2300) * 10; |
| 1935 | freq_band = AR5K_EEPROM_BAND_2GHZ; |
| 1936 | } else { |
| 1937 | chan_fbin = (channel->center_freq - 4900) * 10; |
| 1938 | freq_band = AR5K_EEPROM_BAND_5GHZ; |
| 1939 | } |
| 1940 | |
| 1941 | /* Check if any spur_chan_fbin from EEPROM is |
| 1942 | * within our current channel's spur detection range */ |
| 1943 | spur_chan_fbin = AR5K_EEPROM_NO_SPUR; |
| 1944 | spur_detection_window = AR5K_SPUR_CHAN_WIDTH; |
| 1945 | /* XXX: Half/Quarter channels ?*/ |
Nick Kossifidis | a2677fe | 2010-11-23 21:28:15 +0200 | [diff] [blame] | 1946 | if (ah->ah_bwmode == AR5K_BWMODE_40MHZ) |
Nick Kossifidis | 57e6c56 | 2009-04-30 15:55:50 -0400 | [diff] [blame] | 1947 | spur_detection_window *= 2; |
| 1948 | |
| 1949 | for (i = 0; i < AR5K_EEPROM_N_SPUR_CHANS; i++) { |
| 1950 | spur_chan_fbin = ee->ee_spur_chans[i][freq_band]; |
| 1951 | |
| 1952 | /* Note: mask cleans AR5K_EEPROM_NO_SPUR flag |
| 1953 | * so it's zero if we got nothing from EEPROM */ |
| 1954 | if (spur_chan_fbin == AR5K_EEPROM_NO_SPUR) { |
| 1955 | spur_chan_fbin &= AR5K_EEPROM_SPUR_CHAN_MASK; |
| 1956 | break; |
| 1957 | } |
| 1958 | |
| 1959 | if ((chan_fbin - spur_detection_window <= |
| 1960 | (spur_chan_fbin & AR5K_EEPROM_SPUR_CHAN_MASK)) && |
| 1961 | (chan_fbin + spur_detection_window >= |
| 1962 | (spur_chan_fbin & AR5K_EEPROM_SPUR_CHAN_MASK))) { |
| 1963 | spur_chan_fbin &= AR5K_EEPROM_SPUR_CHAN_MASK; |
| 1964 | break; |
| 1965 | } |
| 1966 | } |
| 1967 | |
| 1968 | /* We need to enable spur filter for this channel */ |
| 1969 | if (spur_chan_fbin) { |
| 1970 | spur_offset = spur_chan_fbin - chan_fbin; |
| 1971 | /* |
| 1972 | * Calculate deltas: |
| 1973 | * spur_freq_sigma_delta -> spur_offset / sample_freq << 21 |
| 1974 | * spur_delta_phase -> spur_offset / chip_freq << 11 |
Nick Kossifidis | a2677fe | 2010-11-23 21:28:15 +0200 | [diff] [blame] | 1975 | * Note: Both values have 100Hz resolution |
Nick Kossifidis | 57e6c56 | 2009-04-30 15:55:50 -0400 | [diff] [blame] | 1976 | */ |
Nick Kossifidis | a2677fe | 2010-11-23 21:28:15 +0200 | [diff] [blame] | 1977 | switch (ah->ah_bwmode) { |
| 1978 | case AR5K_BWMODE_40MHZ: |
Nick Kossifidis | 57e6c56 | 2009-04-30 15:55:50 -0400 | [diff] [blame] | 1979 | /* Both sample_freq and chip_freq are 80MHz */ |
| 1980 | spur_delta_phase = (spur_offset << 16) / 25; |
| 1981 | spur_freq_sigma_delta = (spur_delta_phase >> 10); |
Nick Kossifidis | a2677fe | 2010-11-23 21:28:15 +0200 | [diff] [blame] | 1982 | symbol_width = AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz * 2; |
Nick Kossifidis | 57e6c56 | 2009-04-30 15:55:50 -0400 | [diff] [blame] | 1983 | break; |
Nick Kossifidis | a2677fe | 2010-11-23 21:28:15 +0200 | [diff] [blame] | 1984 | case AR5K_BWMODE_10MHZ: |
| 1985 | /* Both sample_freq and chip_freq are 20MHz (?) */ |
| 1986 | spur_delta_phase = (spur_offset << 18) / 25; |
| 1987 | spur_freq_sigma_delta = (spur_delta_phase >> 10); |
| 1988 | symbol_width = AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz / 2; |
| 1989 | case AR5K_BWMODE_5MHZ: |
| 1990 | /* Both sample_freq and chip_freq are 10MHz (?) */ |
| 1991 | spur_delta_phase = (spur_offset << 19) / 25; |
| 1992 | spur_freq_sigma_delta = (spur_delta_phase >> 10); |
| 1993 | symbol_width = AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz / 4; |
Nick Kossifidis | 57e6c56 | 2009-04-30 15:55:50 -0400 | [diff] [blame] | 1994 | default: |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 1995 | if (channel->band == IEEE80211_BAND_5GHZ) { |
Nick Kossifidis | a2677fe | 2010-11-23 21:28:15 +0200 | [diff] [blame] | 1996 | /* Both sample_freq and chip_freq are 40MHz */ |
| 1997 | spur_delta_phase = (spur_offset << 17) / 25; |
| 1998 | spur_freq_sigma_delta = |
| 1999 | (spur_delta_phase >> 10); |
| 2000 | symbol_width = |
| 2001 | AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz; |
| 2002 | } else { |
| 2003 | /* sample_freq -> 40MHz chip_freq -> 44MHz |
| 2004 | * (for b compatibility) */ |
| 2005 | spur_delta_phase = (spur_offset << 17) / 25; |
| 2006 | spur_freq_sigma_delta = |
| 2007 | (spur_offset << 8) / 55; |
| 2008 | symbol_width = |
| 2009 | AR5K_SPUR_SYMBOL_WIDTH_BASE_100Hz; |
| 2010 | } |
| 2011 | break; |
Nick Kossifidis | 57e6c56 | 2009-04-30 15:55:50 -0400 | [diff] [blame] | 2012 | } |
| 2013 | |
| 2014 | /* Calculate pilot and magnitude masks */ |
| 2015 | |
| 2016 | /* Scale up spur_offset by 1000 to switch to 100HZ resolution |
| 2017 | * and divide by symbol_width to find how many symbols we have |
| 2018 | * Note: number of symbols is scaled up by 16 */ |
| 2019 | num_symbols_x16 = ((spur_offset * 1000) << 4) / symbol_width; |
| 2020 | |
| 2021 | /* Spur is on a symbol if num_symbols_x16 % 16 is zero */ |
| 2022 | if (!(num_symbols_x16 & 0xF)) |
| 2023 | /* _X_ */ |
| 2024 | num_symbol_offsets = 3; |
| 2025 | else |
| 2026 | /* _xx_ */ |
| 2027 | num_symbol_offsets = 4; |
| 2028 | |
| 2029 | for (i = 0; i < num_symbol_offsets; i++) { |
| 2030 | |
| 2031 | /* Calculate pilot mask */ |
| 2032 | s32 curr_sym_off = |
| 2033 | (num_symbols_x16 / 16) + i + 25; |
| 2034 | |
| 2035 | /* Pilot magnitude mask seems to be a way to |
| 2036 | * declare the boundaries for our detection |
| 2037 | * window or something, it's 2 for the middle |
| 2038 | * value(s) where the symbol is expected to be |
| 2039 | * and 1 on the boundary values */ |
| 2040 | u8 plt_mag_map = |
| 2041 | (i == 0 || i == (num_symbol_offsets - 1)) |
| 2042 | ? 1 : 2; |
| 2043 | |
| 2044 | if (curr_sym_off >= 0 && curr_sym_off <= 32) { |
| 2045 | if (curr_sym_off <= 25) |
| 2046 | pilot_mask[0] |= 1 << curr_sym_off; |
| 2047 | else if (curr_sym_off >= 27) |
| 2048 | pilot_mask[0] |= 1 << (curr_sym_off - 1); |
| 2049 | } else if (curr_sym_off >= 33 && curr_sym_off <= 52) |
| 2050 | pilot_mask[1] |= 1 << (curr_sym_off - 33); |
| 2051 | |
| 2052 | /* Calculate magnitude mask (for viterbi decoder) */ |
| 2053 | if (curr_sym_off >= -1 && curr_sym_off <= 14) |
| 2054 | mag_mask[0] |= |
| 2055 | plt_mag_map << (curr_sym_off + 1) * 2; |
| 2056 | else if (curr_sym_off >= 15 && curr_sym_off <= 30) |
| 2057 | mag_mask[1] |= |
| 2058 | plt_mag_map << (curr_sym_off - 15) * 2; |
| 2059 | else if (curr_sym_off >= 31 && curr_sym_off <= 46) |
| 2060 | mag_mask[2] |= |
| 2061 | plt_mag_map << (curr_sym_off - 31) * 2; |
Bob Copeland | 53b1cf8 | 2010-08-24 21:37:14 -0400 | [diff] [blame] | 2062 | else if (curr_sym_off >= 47 && curr_sym_off <= 53) |
Nick Kossifidis | 57e6c56 | 2009-04-30 15:55:50 -0400 | [diff] [blame] | 2063 | mag_mask[3] |= |
| 2064 | plt_mag_map << (curr_sym_off - 47) * 2; |
| 2065 | |
| 2066 | } |
| 2067 | |
| 2068 | /* Write settings on hw to enable spur filter */ |
| 2069 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL, |
| 2070 | AR5K_PHY_BIN_MASK_CTL_RATE, 0xff); |
| 2071 | /* XXX: Self correlator also ? */ |
| 2072 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, |
| 2073 | AR5K_PHY_IQ_PILOT_MASK_EN | |
| 2074 | AR5K_PHY_IQ_CHAN_MASK_EN | |
| 2075 | AR5K_PHY_IQ_SPUR_FILT_EN); |
| 2076 | |
| 2077 | /* Set delta phase and freq sigma delta */ |
| 2078 | ath5k_hw_reg_write(ah, |
| 2079 | AR5K_REG_SM(spur_delta_phase, |
| 2080 | AR5K_PHY_TIMING_11_SPUR_DELTA_PHASE) | |
| 2081 | AR5K_REG_SM(spur_freq_sigma_delta, |
| 2082 | AR5K_PHY_TIMING_11_SPUR_FREQ_SD) | |
| 2083 | AR5K_PHY_TIMING_11_USE_SPUR_IN_AGC, |
| 2084 | AR5K_PHY_TIMING_11); |
| 2085 | |
| 2086 | /* Write pilot masks */ |
| 2087 | ath5k_hw_reg_write(ah, pilot_mask[0], AR5K_PHY_TIMING_7); |
| 2088 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_8, |
| 2089 | AR5K_PHY_TIMING_8_PILOT_MASK_2, |
| 2090 | pilot_mask[1]); |
| 2091 | |
| 2092 | ath5k_hw_reg_write(ah, pilot_mask[0], AR5K_PHY_TIMING_9); |
| 2093 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_10, |
| 2094 | AR5K_PHY_TIMING_10_PILOT_MASK_2, |
| 2095 | pilot_mask[1]); |
| 2096 | |
| 2097 | /* Write magnitude masks */ |
| 2098 | ath5k_hw_reg_write(ah, mag_mask[0], AR5K_PHY_BIN_MASK_1); |
| 2099 | ath5k_hw_reg_write(ah, mag_mask[1], AR5K_PHY_BIN_MASK_2); |
| 2100 | ath5k_hw_reg_write(ah, mag_mask[2], AR5K_PHY_BIN_MASK_3); |
| 2101 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL, |
| 2102 | AR5K_PHY_BIN_MASK_CTL_MASK_4, |
| 2103 | mag_mask[3]); |
| 2104 | |
| 2105 | ath5k_hw_reg_write(ah, mag_mask[0], AR5K_PHY_BIN_MASK2_1); |
| 2106 | ath5k_hw_reg_write(ah, mag_mask[1], AR5K_PHY_BIN_MASK2_2); |
| 2107 | ath5k_hw_reg_write(ah, mag_mask[2], AR5K_PHY_BIN_MASK2_3); |
| 2108 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK2_4, |
| 2109 | AR5K_PHY_BIN_MASK2_4_MASK_4, |
| 2110 | mag_mask[3]); |
| 2111 | |
| 2112 | } else if (ath5k_hw_reg_read(ah, AR5K_PHY_IQ) & |
| 2113 | AR5K_PHY_IQ_SPUR_FILT_EN) { |
Pavel Roskin | 6a2a0e7 | 2011-07-09 00:17:51 -0400 | [diff] [blame] | 2114 | /* Clean up spur mitigation settings and disable filter */ |
Nick Kossifidis | 57e6c56 | 2009-04-30 15:55:50 -0400 | [diff] [blame] | 2115 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL, |
| 2116 | AR5K_PHY_BIN_MASK_CTL_RATE, 0); |
| 2117 | AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_IQ, |
| 2118 | AR5K_PHY_IQ_PILOT_MASK_EN | |
| 2119 | AR5K_PHY_IQ_CHAN_MASK_EN | |
| 2120 | AR5K_PHY_IQ_SPUR_FILT_EN); |
| 2121 | ath5k_hw_reg_write(ah, 0, AR5K_PHY_TIMING_11); |
| 2122 | |
| 2123 | /* Clear pilot masks */ |
| 2124 | ath5k_hw_reg_write(ah, 0, AR5K_PHY_TIMING_7); |
| 2125 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_8, |
| 2126 | AR5K_PHY_TIMING_8_PILOT_MASK_2, |
| 2127 | 0); |
| 2128 | |
| 2129 | ath5k_hw_reg_write(ah, 0, AR5K_PHY_TIMING_9); |
| 2130 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_TIMING_10, |
| 2131 | AR5K_PHY_TIMING_10_PILOT_MASK_2, |
| 2132 | 0); |
| 2133 | |
| 2134 | /* Clear magnitude masks */ |
| 2135 | ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK_1); |
| 2136 | ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK_2); |
| 2137 | ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK_3); |
| 2138 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK_CTL, |
| 2139 | AR5K_PHY_BIN_MASK_CTL_MASK_4, |
| 2140 | 0); |
| 2141 | |
| 2142 | ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK2_1); |
| 2143 | ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK2_2); |
| 2144 | ath5k_hw_reg_write(ah, 0, AR5K_PHY_BIN_MASK2_3); |
| 2145 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_BIN_MASK2_4, |
| 2146 | AR5K_PHY_BIN_MASK2_4_MASK_4, |
| 2147 | 0); |
| 2148 | } |
| 2149 | } |
| 2150 | |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2151 | |
Nick Kossifidis | 2bed03e | 2009-04-30 15:55:49 -0400 | [diff] [blame] | 2152 | /*****************\ |
| 2153 | * Antenna control * |
| 2154 | \*****************/ |
| 2155 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 2156 | /** |
| 2157 | * DOC: Antenna control |
| 2158 | * |
| 2159 | * Hw supports up to 14 antennas ! I haven't found any card that implements |
| 2160 | * that. The maximum number of antennas I've seen is up to 4 (2 for 2GHz and 2 |
| 2161 | * for 5GHz). Antenna 1 (MAIN) should be omnidirectional, 2 (AUX) |
| 2162 | * omnidirectional or sectorial and antennas 3-14 sectorial (or directional). |
| 2163 | * |
| 2164 | * We can have a single antenna for RX and multiple antennas for TX. |
| 2165 | * RX antenna is our "default" antenna (usually antenna 1) set on |
| 2166 | * DEFAULT_ANTENNA register and TX antenna is set on each TX control descriptor |
| 2167 | * (0 for automatic selection, 1 - 14 antenna number). |
| 2168 | * |
| 2169 | * We can let hw do all the work doing fast antenna diversity for both |
| 2170 | * tx and rx or we can do things manually. Here are the options we have |
| 2171 | * (all are bits of STA_ID1 register): |
| 2172 | * |
| 2173 | * AR5K_STA_ID1_DEFAULT_ANTENNA -> When 0 is set as the TX antenna on TX |
| 2174 | * control descriptor, use the default antenna to transmit or else use the last |
| 2175 | * antenna on which we received an ACK. |
| 2176 | * |
| 2177 | * AR5K_STA_ID1_DESC_ANTENNA -> Update default antenna after each TX frame to |
| 2178 | * the antenna on which we got the ACK for that frame. |
| 2179 | * |
| 2180 | * AR5K_STA_ID1_RTS_DEF_ANTENNA -> Use default antenna for RTS or else use the |
| 2181 | * one on the TX descriptor. |
| 2182 | * |
| 2183 | * AR5K_STA_ID1_SELFGEN_DEF_ANT -> Use default antenna for self generated frames |
| 2184 | * (ACKs etc), or else use current antenna (the one we just used for TX). |
| 2185 | * |
| 2186 | * Using the above we support the following scenarios: |
| 2187 | * |
| 2188 | * AR5K_ANTMODE_DEFAULT -> Hw handles antenna diversity etc automatically |
| 2189 | * |
| 2190 | * AR5K_ANTMODE_FIXED_A -> Only antenna A (MAIN) is present |
| 2191 | * |
| 2192 | * AR5K_ANTMODE_FIXED_B -> Only antenna B (AUX) is present |
| 2193 | * |
| 2194 | * AR5K_ANTMODE_SINGLE_AP -> Sta locked on a single ap |
| 2195 | * |
| 2196 | * AR5K_ANTMODE_SECTOR_AP -> AP with tx antenna set on tx desc |
| 2197 | * |
| 2198 | * AR5K_ANTMODE_SECTOR_STA -> STA with tx antenna set on tx desc |
| 2199 | * |
| 2200 | * AR5K_ANTMODE_DEBUG Debug mode -A -> Rx, B-> Tx- |
| 2201 | * |
| 2202 | * Also note that when setting antenna to F on tx descriptor card inverts |
| 2203 | * current tx antenna. |
| 2204 | */ |
| 2205 | |
| 2206 | /** |
| 2207 | * ath5k_hw_set_def_antenna() - Set default rx antenna on AR5211/5212 and newer |
| 2208 | * @ah: The &struct ath5k_hw |
| 2209 | * @ant: Antenna number |
| 2210 | */ |
| 2211 | static void |
Nick Kossifidis | 2bed03e | 2009-04-30 15:55:49 -0400 | [diff] [blame] | 2212 | ath5k_hw_set_def_antenna(struct ath5k_hw *ah, u8 ant) |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2213 | { |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2214 | if (ah->ah_version != AR5K_AR5210) |
Nick Kossifidis | 2bed03e | 2009-04-30 15:55:49 -0400 | [diff] [blame] | 2215 | ath5k_hw_reg_write(ah, ant & 0x7, AR5K_DEFAULT_ANTENNA); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2216 | } |
| 2217 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 2218 | /** |
| 2219 | * ath5k_hw_set_fast_div() - Enable/disable fast rx antenna diversity |
| 2220 | * @ah: The &struct ath5k_hw |
| 2221 | * @ee_mode: One of enum ath5k_driver_mode |
| 2222 | * @enable: True to enable, false to disable |
Nick Kossifidis | 2bed03e | 2009-04-30 15:55:49 -0400 | [diff] [blame] | 2223 | */ |
| 2224 | static void |
| 2225 | ath5k_hw_set_fast_div(struct ath5k_hw *ah, u8 ee_mode, bool enable) |
| 2226 | { |
| 2227 | switch (ee_mode) { |
| 2228 | case AR5K_EEPROM_MODE_11G: |
| 2229 | /* XXX: This is set to |
| 2230 | * disabled on initvals !!! */ |
| 2231 | case AR5K_EEPROM_MODE_11A: |
| 2232 | if (enable) |
| 2233 | AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_AGCCTL, |
| 2234 | AR5K_PHY_AGCCTL_OFDM_DIV_DIS); |
| 2235 | else |
| 2236 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL, |
| 2237 | AR5K_PHY_AGCCTL_OFDM_DIV_DIS); |
| 2238 | break; |
| 2239 | case AR5K_EEPROM_MODE_11B: |
| 2240 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL, |
| 2241 | AR5K_PHY_AGCCTL_OFDM_DIV_DIS); |
| 2242 | break; |
| 2243 | default: |
| 2244 | return; |
| 2245 | } |
| 2246 | |
| 2247 | if (enable) { |
| 2248 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_RESTART, |
Bruno Randolf | 6665b54 | 2010-06-28 11:01:48 +0900 | [diff] [blame] | 2249 | AR5K_PHY_RESTART_DIV_GC, 4); |
Nick Kossifidis | 2bed03e | 2009-04-30 15:55:49 -0400 | [diff] [blame] | 2250 | |
| 2251 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_FAST_ANT_DIV, |
| 2252 | AR5K_PHY_FAST_ANT_DIV_EN); |
| 2253 | } else { |
| 2254 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_RESTART, |
Bruno Randolf | 39d5b2c | 2010-06-07 13:11:25 +0900 | [diff] [blame] | 2255 | AR5K_PHY_RESTART_DIV_GC, 0); |
Nick Kossifidis | 2bed03e | 2009-04-30 15:55:49 -0400 | [diff] [blame] | 2256 | |
| 2257 | AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_FAST_ANT_DIV, |
| 2258 | AR5K_PHY_FAST_ANT_DIV_EN); |
| 2259 | } |
| 2260 | } |
| 2261 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 2262 | /** |
| 2263 | * ath5k_hw_set_antenna_switch() - Set up antenna switch table |
| 2264 | * @ah: The &struct ath5k_hw |
| 2265 | * @ee_mode: One of enum ath5k_driver_mode |
| 2266 | * |
| 2267 | * Switch table comes from EEPROM and includes information on controlling |
| 2268 | * the 2 antenna RX attenuators |
| 2269 | */ |
Bruno Randolf | 0ca7402 | 2010-06-07 13:11:30 +0900 | [diff] [blame] | 2270 | void |
| 2271 | ath5k_hw_set_antenna_switch(struct ath5k_hw *ah, u8 ee_mode) |
| 2272 | { |
| 2273 | u8 ant0, ant1; |
| 2274 | |
| 2275 | /* |
| 2276 | * In case a fixed antenna was set as default |
| 2277 | * use the same switch table twice. |
| 2278 | */ |
| 2279 | if (ah->ah_ant_mode == AR5K_ANTMODE_FIXED_A) |
| 2280 | ant0 = ant1 = AR5K_ANT_SWTABLE_A; |
| 2281 | else if (ah->ah_ant_mode == AR5K_ANTMODE_FIXED_B) |
| 2282 | ant0 = ant1 = AR5K_ANT_SWTABLE_B; |
| 2283 | else { |
| 2284 | ant0 = AR5K_ANT_SWTABLE_A; |
| 2285 | ant1 = AR5K_ANT_SWTABLE_B; |
| 2286 | } |
| 2287 | |
| 2288 | /* Set antenna idle switch table */ |
| 2289 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_ANT_CTL, |
| 2290 | AR5K_PHY_ANT_CTL_SWTABLE_IDLE, |
| 2291 | (ah->ah_ant_ctl[ee_mode][AR5K_ANT_CTL] | |
| 2292 | AR5K_PHY_ANT_CTL_TXRX_EN)); |
| 2293 | |
| 2294 | /* Set antenna switch tables */ |
| 2295 | ath5k_hw_reg_write(ah, ah->ah_ant_ctl[ee_mode][ant0], |
| 2296 | AR5K_PHY_ANT_SWITCH_TABLE_0); |
| 2297 | ath5k_hw_reg_write(ah, ah->ah_ant_ctl[ee_mode][ant1], |
| 2298 | AR5K_PHY_ANT_SWITCH_TABLE_1); |
| 2299 | } |
| 2300 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 2301 | /** |
| 2302 | * ath5k_hw_set_antenna_mode() - Set antenna operating mode |
| 2303 | * @ah: The &struct ath5k_hw |
| 2304 | * @ant_mode: One of enum ath5k_ant_mode |
Nick Kossifidis | 2bed03e | 2009-04-30 15:55:49 -0400 | [diff] [blame] | 2305 | */ |
| 2306 | void |
| 2307 | ath5k_hw_set_antenna_mode(struct ath5k_hw *ah, u8 ant_mode) |
| 2308 | { |
Bob Copeland | 46026e8 | 2009-06-10 22:22:20 -0400 | [diff] [blame] | 2309 | struct ieee80211_channel *channel = ah->ah_current_channel; |
Nick Kossifidis | 2bed03e | 2009-04-30 15:55:49 -0400 | [diff] [blame] | 2310 | bool use_def_for_tx, update_def_on_tx, use_def_for_rts, fast_div; |
| 2311 | bool use_def_for_sg; |
Dan Carpenter | a8851d1 | 2011-01-03 08:46:29 +0300 | [diff] [blame] | 2312 | int ee_mode; |
| 2313 | u8 def_ant, tx_ant; |
Nick Kossifidis | 2bed03e | 2009-04-30 15:55:49 -0400 | [diff] [blame] | 2314 | u32 sta_id1 = 0; |
| 2315 | |
Bruno Randolf | 436c109 | 2010-06-07 13:11:19 +0900 | [diff] [blame] | 2316 | /* if channel is not initialized yet we can't set the antennas |
| 2317 | * so just store the mode. it will be set on the next reset */ |
| 2318 | if (channel == NULL) { |
| 2319 | ah->ah_ant_mode = ant_mode; |
| 2320 | return; |
| 2321 | } |
| 2322 | |
Nick Kossifidis | 2bed03e | 2009-04-30 15:55:49 -0400 | [diff] [blame] | 2323 | def_ant = ah->ah_def_ant; |
| 2324 | |
Bruno Randolf | 0207c0c | 2010-12-21 17:30:43 +0900 | [diff] [blame] | 2325 | ee_mode = ath5k_eeprom_mode_from_channel(channel); |
| 2326 | if (ee_mode < 0) { |
Pavel Roskin | e0d687b | 2011-07-14 20:21:55 -0400 | [diff] [blame] | 2327 | ATH5K_ERR(ah, |
Nick Kossifidis | 2bed03e | 2009-04-30 15:55:49 -0400 | [diff] [blame] | 2328 | "invalid channel: %d\n", channel->center_freq); |
| 2329 | return; |
| 2330 | } |
| 2331 | |
| 2332 | switch (ant_mode) { |
| 2333 | case AR5K_ANTMODE_DEFAULT: |
| 2334 | tx_ant = 0; |
| 2335 | use_def_for_tx = false; |
| 2336 | update_def_on_tx = false; |
| 2337 | use_def_for_rts = false; |
| 2338 | use_def_for_sg = false; |
| 2339 | fast_div = true; |
| 2340 | break; |
| 2341 | case AR5K_ANTMODE_FIXED_A: |
| 2342 | def_ant = 1; |
Bruno Randolf | 8bd8bea | 2010-03-09 16:55:23 +0900 | [diff] [blame] | 2343 | tx_ant = 1; |
Nick Kossifidis | 2bed03e | 2009-04-30 15:55:49 -0400 | [diff] [blame] | 2344 | use_def_for_tx = true; |
| 2345 | update_def_on_tx = false; |
| 2346 | use_def_for_rts = true; |
| 2347 | use_def_for_sg = true; |
| 2348 | fast_div = false; |
| 2349 | break; |
| 2350 | case AR5K_ANTMODE_FIXED_B: |
| 2351 | def_ant = 2; |
Bruno Randolf | 8bd8bea | 2010-03-09 16:55:23 +0900 | [diff] [blame] | 2352 | tx_ant = 2; |
Nick Kossifidis | 2bed03e | 2009-04-30 15:55:49 -0400 | [diff] [blame] | 2353 | use_def_for_tx = true; |
| 2354 | update_def_on_tx = false; |
| 2355 | use_def_for_rts = true; |
| 2356 | use_def_for_sg = true; |
| 2357 | fast_div = false; |
| 2358 | break; |
| 2359 | case AR5K_ANTMODE_SINGLE_AP: |
| 2360 | def_ant = 1; /* updated on tx */ |
| 2361 | tx_ant = 0; |
| 2362 | use_def_for_tx = true; |
| 2363 | update_def_on_tx = true; |
| 2364 | use_def_for_rts = true; |
| 2365 | use_def_for_sg = true; |
| 2366 | fast_div = true; |
| 2367 | break; |
| 2368 | case AR5K_ANTMODE_SECTOR_AP: |
| 2369 | tx_ant = 1; /* variable */ |
| 2370 | use_def_for_tx = false; |
| 2371 | update_def_on_tx = false; |
| 2372 | use_def_for_rts = true; |
| 2373 | use_def_for_sg = false; |
| 2374 | fast_div = false; |
| 2375 | break; |
| 2376 | case AR5K_ANTMODE_SECTOR_STA: |
| 2377 | tx_ant = 1; /* variable */ |
| 2378 | use_def_for_tx = true; |
| 2379 | update_def_on_tx = false; |
| 2380 | use_def_for_rts = true; |
| 2381 | use_def_for_sg = false; |
| 2382 | fast_div = true; |
| 2383 | break; |
| 2384 | case AR5K_ANTMODE_DEBUG: |
| 2385 | def_ant = 1; |
| 2386 | tx_ant = 2; |
| 2387 | use_def_for_tx = false; |
| 2388 | update_def_on_tx = false; |
| 2389 | use_def_for_rts = false; |
| 2390 | use_def_for_sg = false; |
| 2391 | fast_div = false; |
| 2392 | break; |
| 2393 | default: |
| 2394 | return; |
| 2395 | } |
| 2396 | |
| 2397 | ah->ah_tx_ant = tx_ant; |
| 2398 | ah->ah_ant_mode = ant_mode; |
Bruno Randolf | caec911 | 2010-03-09 16:55:28 +0900 | [diff] [blame] | 2399 | ah->ah_def_ant = def_ant; |
Nick Kossifidis | 2bed03e | 2009-04-30 15:55:49 -0400 | [diff] [blame] | 2400 | |
| 2401 | sta_id1 |= use_def_for_tx ? AR5K_STA_ID1_DEFAULT_ANTENNA : 0; |
| 2402 | sta_id1 |= update_def_on_tx ? AR5K_STA_ID1_DESC_ANTENNA : 0; |
| 2403 | sta_id1 |= use_def_for_rts ? AR5K_STA_ID1_RTS_DEF_ANTENNA : 0; |
| 2404 | sta_id1 |= use_def_for_sg ? AR5K_STA_ID1_SELFGEN_DEF_ANT : 0; |
| 2405 | |
| 2406 | AR5K_REG_DISABLE_BITS(ah, AR5K_STA_ID1, AR5K_STA_ID1_ANTENNA_SETTINGS); |
| 2407 | |
| 2408 | if (sta_id1) |
| 2409 | AR5K_REG_ENABLE_BITS(ah, AR5K_STA_ID1, sta_id1); |
| 2410 | |
Bruno Randolf | 0ca7402 | 2010-06-07 13:11:30 +0900 | [diff] [blame] | 2411 | ath5k_hw_set_antenna_switch(ah, ee_mode); |
Nick Kossifidis | 2bed03e | 2009-04-30 15:55:49 -0400 | [diff] [blame] | 2412 | /* Note: set diversity before default antenna |
| 2413 | * because it won't work correctly */ |
| 2414 | ath5k_hw_set_fast_div(ah, ee_mode, fast_div); |
| 2415 | ath5k_hw_set_def_antenna(ah, def_ant); |
| 2416 | } |
| 2417 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2418 | |
| 2419 | /****************\ |
| 2420 | * TX power setup * |
| 2421 | \****************/ |
| 2422 | |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2423 | /* |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2424 | * Helper functions |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2425 | */ |
| 2426 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 2427 | /** |
| 2428 | * ath5k_get_interpolated_value() - Get interpolated Y val between two points |
| 2429 | * @target: X value of the middle point |
| 2430 | * @x_left: X value of the left point |
| 2431 | * @x_right: X value of the right point |
| 2432 | * @y_left: Y value of the left point |
| 2433 | * @y_right: Y value of the right point |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2434 | */ |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2435 | static s16 |
| 2436 | ath5k_get_interpolated_value(s16 target, s16 x_left, s16 x_right, |
| 2437 | s16 y_left, s16 y_right) |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2438 | { |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2439 | s16 ratio, result; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2440 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2441 | /* Avoid divide by zero and skip interpolation |
| 2442 | * if we have the same point */ |
| 2443 | if ((x_left == x_right) || (y_left == y_right)) |
| 2444 | return y_left; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2445 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2446 | /* |
| 2447 | * Since we use ints and not fps, we need to scale up in |
| 2448 | * order to get a sane ratio value (or else we 'll eg. get |
| 2449 | * always 1 instead of 1.25, 1.75 etc). We scale up by 100 |
| 2450 | * to have some accuracy both for 0.5 and 0.25 steps. |
| 2451 | */ |
Pavel Roskin | e4bbf2f | 2011-07-07 18:14:13 -0400 | [diff] [blame] | 2452 | ratio = ((100 * y_right - 100 * y_left) / (x_right - x_left)); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2453 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2454 | /* Now scale down to be in range */ |
| 2455 | result = y_left + (ratio * (target - x_left) / 100); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2456 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2457 | return result; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2458 | } |
| 2459 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 2460 | /** |
| 2461 | * ath5k_get_linear_pcdac_min() - Find vertical boundary (min pwr) for the |
| 2462 | * linear PCDAC curve |
| 2463 | * @stepL: Left array with y values (pcdac steps) |
| 2464 | * @stepR: Right array with y values (pcdac steps) |
| 2465 | * @pwrL: Left array with x values (power steps) |
| 2466 | * @pwrR: Right array with x values (power steps) |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2467 | * |
| 2468 | * Since we have the top of the curve and we draw the line below |
| 2469 | * until we reach 1 (1 pcdac step) we need to know which point |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 2470 | * (x value) that is so that we don't go below x axis and have negative |
| 2471 | * pcdac values when creating the curve, or fill the table with zeros. |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2472 | */ |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2473 | static s16 |
| 2474 | ath5k_get_linear_pcdac_min(const u8 *stepL, const u8 *stepR, |
| 2475 | const s16 *pwrL, const s16 *pwrR) |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2476 | { |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2477 | s8 tmp; |
| 2478 | s16 min_pwrL, min_pwrR; |
Fabio Rossi | 64cdb0e | 2009-04-01 20:37:50 +0200 | [diff] [blame] | 2479 | s16 pwr_i; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2480 | |
Nick Kossifidis | d1cb0bd | 2009-08-10 03:27:59 +0300 | [diff] [blame] | 2481 | /* Some vendors write the same pcdac value twice !!! */ |
| 2482 | if (stepL[0] == stepL[1] || stepR[0] == stepR[1]) |
| 2483 | return max(pwrL[0], pwrR[0]); |
Bob Copeland | 9c8b3ed | 2009-05-19 23:37:31 -0400 | [diff] [blame] | 2484 | |
Fabio Rossi | 64cdb0e | 2009-04-01 20:37:50 +0200 | [diff] [blame] | 2485 | if (pwrL[0] == pwrL[1]) |
| 2486 | min_pwrL = pwrL[0]; |
| 2487 | else { |
| 2488 | pwr_i = pwrL[0]; |
| 2489 | do { |
| 2490 | pwr_i--; |
| 2491 | tmp = (s8) ath5k_get_interpolated_value(pwr_i, |
| 2492 | pwrL[0], pwrL[1], |
| 2493 | stepL[0], stepL[1]); |
| 2494 | } while (tmp > 1); |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2495 | |
Fabio Rossi | 64cdb0e | 2009-04-01 20:37:50 +0200 | [diff] [blame] | 2496 | min_pwrL = pwr_i; |
| 2497 | } |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2498 | |
Fabio Rossi | 64cdb0e | 2009-04-01 20:37:50 +0200 | [diff] [blame] | 2499 | if (pwrR[0] == pwrR[1]) |
| 2500 | min_pwrR = pwrR[0]; |
| 2501 | else { |
| 2502 | pwr_i = pwrR[0]; |
| 2503 | do { |
| 2504 | pwr_i--; |
| 2505 | tmp = (s8) ath5k_get_interpolated_value(pwr_i, |
| 2506 | pwrR[0], pwrR[1], |
| 2507 | stepR[0], stepR[1]); |
| 2508 | } while (tmp > 1); |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2509 | |
Fabio Rossi | 64cdb0e | 2009-04-01 20:37:50 +0200 | [diff] [blame] | 2510 | min_pwrR = pwr_i; |
| 2511 | } |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2512 | |
| 2513 | /* Keep the right boundary so that it works for both curves */ |
| 2514 | return max(min_pwrL, min_pwrR); |
| 2515 | } |
| 2516 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 2517 | /** |
| 2518 | * ath5k_create_power_curve() - Create a Power to PDADC or PCDAC curve |
| 2519 | * @pmin: Minimum power value (xmin) |
| 2520 | * @pmax: Maximum power value (xmax) |
| 2521 | * @pwr: Array of power steps (x values) |
| 2522 | * @vpd: Array of matching PCDAC/PDADC steps (y values) |
| 2523 | * @num_points: Number of provided points |
| 2524 | * @vpd_table: Array to fill with the full PCDAC/PDADC values (y values) |
| 2525 | * @type: One of enum ath5k_powertable_type (eeprom.h) |
| 2526 | * |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2527 | * Interpolate (pwr,vpd) points to create a Power to PDADC or a |
| 2528 | * Power to PCDAC curve. |
| 2529 | * |
| 2530 | * Each curve has power on x axis (in 0.5dB units) and PCDAC/PDADC |
| 2531 | * steps (offsets) on y axis. Power can go up to 31.5dB and max |
| 2532 | * PCDAC/PDADC step for each curve is 64 but we can write more than |
| 2533 | * one curves on hw so we can go up to 128 (which is the max step we |
| 2534 | * can write on the final table). |
| 2535 | * |
| 2536 | * We write y values (PCDAC/PDADC steps) on hw. |
| 2537 | */ |
| 2538 | static void |
| 2539 | ath5k_create_power_curve(s16 pmin, s16 pmax, |
| 2540 | const s16 *pwr, const u8 *vpd, |
| 2541 | u8 num_points, |
| 2542 | u8 *vpd_table, u8 type) |
| 2543 | { |
| 2544 | u8 idx[2] = { 0, 1 }; |
Pavel Roskin | e4bbf2f | 2011-07-07 18:14:13 -0400 | [diff] [blame] | 2545 | s16 pwr_i = 2 * pmin; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2546 | int i; |
| 2547 | |
| 2548 | if (num_points < 2) |
| 2549 | return; |
| 2550 | |
| 2551 | /* We want the whole line, so adjust boundaries |
| 2552 | * to cover the entire power range. Note that |
| 2553 | * power values are already 0.25dB so no need |
| 2554 | * to multiply pwr_i by 2 */ |
| 2555 | if (type == AR5K_PWRTABLE_LINEAR_PCDAC) { |
| 2556 | pwr_i = pmin; |
| 2557 | pmin = 0; |
| 2558 | pmax = 63; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2559 | } |
| 2560 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2561 | /* Find surrounding turning points (TPs) |
| 2562 | * and interpolate between them */ |
| 2563 | for (i = 0; (i <= (u16) (pmax - pmin)) && |
| 2564 | (i < AR5K_EEPROM_POWER_TABLE_SIZE); i++) { |
| 2565 | |
| 2566 | /* We passed the right TP, move to the next set of TPs |
| 2567 | * if we pass the last TP, extrapolate above using the last |
| 2568 | * two TPs for ratio */ |
| 2569 | if ((pwr_i > pwr[idx[1]]) && (idx[1] < num_points - 1)) { |
| 2570 | idx[0]++; |
| 2571 | idx[1]++; |
| 2572 | } |
| 2573 | |
| 2574 | vpd_table[i] = (u8) ath5k_get_interpolated_value(pwr_i, |
| 2575 | pwr[idx[0]], pwr[idx[1]], |
| 2576 | vpd[idx[0]], vpd[idx[1]]); |
| 2577 | |
| 2578 | /* Increase by 0.5dB |
| 2579 | * (0.25 dB units) */ |
| 2580 | pwr_i += 2; |
| 2581 | } |
| 2582 | } |
| 2583 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 2584 | /** |
| 2585 | * ath5k_get_chan_pcal_surrounding_piers() - Get surrounding calibration piers |
| 2586 | * for a given channel. |
| 2587 | * @ah: The &struct ath5k_hw |
| 2588 | * @channel: The &struct ieee80211_channel |
| 2589 | * @pcinfo_l: The &struct ath5k_chan_pcal_info to put the left cal. pier |
| 2590 | * @pcinfo_r: The &struct ath5k_chan_pcal_info to put the right cal. pier |
| 2591 | * |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2592 | * Get the surrounding per-channel power calibration piers |
| 2593 | * for a given frequency so that we can interpolate between |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 2594 | * them and come up with an appropriate dataset for our current |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2595 | * channel. |
| 2596 | */ |
| 2597 | static void |
| 2598 | ath5k_get_chan_pcal_surrounding_piers(struct ath5k_hw *ah, |
| 2599 | struct ieee80211_channel *channel, |
| 2600 | struct ath5k_chan_pcal_info **pcinfo_l, |
| 2601 | struct ath5k_chan_pcal_info **pcinfo_r) |
| 2602 | { |
| 2603 | struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom; |
| 2604 | struct ath5k_chan_pcal_info *pcinfo; |
| 2605 | u8 idx_l, idx_r; |
| 2606 | u8 mode, max, i; |
| 2607 | u32 target = channel->center_freq; |
| 2608 | |
| 2609 | idx_l = 0; |
| 2610 | idx_r = 0; |
| 2611 | |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 2612 | switch (channel->hw_value) { |
| 2613 | case AR5K_EEPROM_MODE_11A: |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2614 | pcinfo = ee->ee_pwr_cal_a; |
| 2615 | mode = AR5K_EEPROM_MODE_11A; |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 2616 | break; |
| 2617 | case AR5K_EEPROM_MODE_11B: |
| 2618 | pcinfo = ee->ee_pwr_cal_b; |
| 2619 | mode = AR5K_EEPROM_MODE_11B; |
| 2620 | break; |
| 2621 | case AR5K_EEPROM_MODE_11G: |
| 2622 | default: |
| 2623 | pcinfo = ee->ee_pwr_cal_g; |
| 2624 | mode = AR5K_EEPROM_MODE_11G; |
| 2625 | break; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2626 | } |
| 2627 | max = ee->ee_n_piers[mode] - 1; |
| 2628 | |
| 2629 | /* Frequency is below our calibrated |
| 2630 | * range. Use the lowest power curve |
| 2631 | * we have */ |
| 2632 | if (target < pcinfo[0].freq) { |
| 2633 | idx_l = idx_r = 0; |
| 2634 | goto done; |
| 2635 | } |
| 2636 | |
| 2637 | /* Frequency is above our calibrated |
| 2638 | * range. Use the highest power curve |
| 2639 | * we have */ |
| 2640 | if (target > pcinfo[max].freq) { |
| 2641 | idx_l = idx_r = max; |
| 2642 | goto done; |
| 2643 | } |
| 2644 | |
| 2645 | /* Frequency is inside our calibrated |
| 2646 | * channel range. Pick the surrounding |
| 2647 | * calibration piers so that we can |
| 2648 | * interpolate */ |
| 2649 | for (i = 0; i <= max; i++) { |
| 2650 | |
| 2651 | /* Frequency matches one of our calibration |
| 2652 | * piers, no need to interpolate, just use |
| 2653 | * that calibration pier */ |
| 2654 | if (pcinfo[i].freq == target) { |
| 2655 | idx_l = idx_r = i; |
| 2656 | goto done; |
| 2657 | } |
| 2658 | |
| 2659 | /* We found a calibration pier that's above |
| 2660 | * frequency, use this pier and the previous |
| 2661 | * one to interpolate */ |
| 2662 | if (target < pcinfo[i].freq) { |
| 2663 | idx_r = i; |
| 2664 | idx_l = idx_r - 1; |
| 2665 | goto done; |
| 2666 | } |
| 2667 | } |
| 2668 | |
| 2669 | done: |
| 2670 | *pcinfo_l = &pcinfo[idx_l]; |
| 2671 | *pcinfo_r = &pcinfo[idx_r]; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2672 | } |
| 2673 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 2674 | /** |
| 2675 | * ath5k_get_rate_pcal_data() - Get the interpolated per-rate power |
| 2676 | * calibration data |
| 2677 | * @ah: The &struct ath5k_hw *ah, |
| 2678 | * @channel: The &struct ieee80211_channel |
| 2679 | * @rates: The &struct ath5k_rate_pcal_info to fill |
| 2680 | * |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2681 | * Get the surrounding per-rate power calibration data |
| 2682 | * for a given frequency and interpolate between power |
| 2683 | * values to set max target power supported by hw for |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 2684 | * each rate on this frequency. |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2685 | */ |
| 2686 | static void |
| 2687 | ath5k_get_rate_pcal_data(struct ath5k_hw *ah, |
| 2688 | struct ieee80211_channel *channel, |
| 2689 | struct ath5k_rate_pcal_info *rates) |
| 2690 | { |
| 2691 | struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom; |
| 2692 | struct ath5k_rate_pcal_info *rpinfo; |
| 2693 | u8 idx_l, idx_r; |
| 2694 | u8 mode, max, i; |
| 2695 | u32 target = channel->center_freq; |
| 2696 | |
| 2697 | idx_l = 0; |
| 2698 | idx_r = 0; |
| 2699 | |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 2700 | switch (channel->hw_value) { |
| 2701 | case AR5K_MODE_11A: |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2702 | rpinfo = ee->ee_rate_tpwr_a; |
| 2703 | mode = AR5K_EEPROM_MODE_11A; |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 2704 | break; |
| 2705 | case AR5K_MODE_11B: |
| 2706 | rpinfo = ee->ee_rate_tpwr_b; |
| 2707 | mode = AR5K_EEPROM_MODE_11B; |
| 2708 | break; |
| 2709 | case AR5K_MODE_11G: |
| 2710 | default: |
| 2711 | rpinfo = ee->ee_rate_tpwr_g; |
| 2712 | mode = AR5K_EEPROM_MODE_11G; |
| 2713 | break; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2714 | } |
| 2715 | max = ee->ee_rate_target_pwr_num[mode] - 1; |
| 2716 | |
| 2717 | /* Get the surrounding calibration |
| 2718 | * piers - same as above */ |
| 2719 | if (target < rpinfo[0].freq) { |
| 2720 | idx_l = idx_r = 0; |
| 2721 | goto done; |
| 2722 | } |
| 2723 | |
| 2724 | if (target > rpinfo[max].freq) { |
| 2725 | idx_l = idx_r = max; |
| 2726 | goto done; |
| 2727 | } |
| 2728 | |
| 2729 | for (i = 0; i <= max; i++) { |
| 2730 | |
| 2731 | if (rpinfo[i].freq == target) { |
| 2732 | idx_l = idx_r = i; |
| 2733 | goto done; |
| 2734 | } |
| 2735 | |
| 2736 | if (target < rpinfo[i].freq) { |
| 2737 | idx_r = i; |
| 2738 | idx_l = idx_r - 1; |
| 2739 | goto done; |
| 2740 | } |
| 2741 | } |
| 2742 | |
| 2743 | done: |
| 2744 | /* Now interpolate power value, based on the frequency */ |
| 2745 | rates->freq = target; |
| 2746 | |
| 2747 | rates->target_power_6to24 = |
| 2748 | ath5k_get_interpolated_value(target, rpinfo[idx_l].freq, |
| 2749 | rpinfo[idx_r].freq, |
| 2750 | rpinfo[idx_l].target_power_6to24, |
| 2751 | rpinfo[idx_r].target_power_6to24); |
| 2752 | |
| 2753 | rates->target_power_36 = |
| 2754 | ath5k_get_interpolated_value(target, rpinfo[idx_l].freq, |
| 2755 | rpinfo[idx_r].freq, |
| 2756 | rpinfo[idx_l].target_power_36, |
| 2757 | rpinfo[idx_r].target_power_36); |
| 2758 | |
| 2759 | rates->target_power_48 = |
| 2760 | ath5k_get_interpolated_value(target, rpinfo[idx_l].freq, |
| 2761 | rpinfo[idx_r].freq, |
| 2762 | rpinfo[idx_l].target_power_48, |
| 2763 | rpinfo[idx_r].target_power_48); |
| 2764 | |
| 2765 | rates->target_power_54 = |
| 2766 | ath5k_get_interpolated_value(target, rpinfo[idx_l].freq, |
| 2767 | rpinfo[idx_r].freq, |
| 2768 | rpinfo[idx_l].target_power_54, |
| 2769 | rpinfo[idx_r].target_power_54); |
| 2770 | } |
| 2771 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 2772 | /** |
| 2773 | * ath5k_get_max_ctl_power() - Get max edge power for a given frequency |
| 2774 | * @ah: the &struct ath5k_hw |
| 2775 | * @channel: The &struct ieee80211_channel |
| 2776 | * |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2777 | * Get the max edge power for this channel if |
| 2778 | * we have such data from EEPROM's Conformance Test |
| 2779 | * Limits (CTL), and limit max power if needed. |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2780 | */ |
| 2781 | static void |
| 2782 | ath5k_get_max_ctl_power(struct ath5k_hw *ah, |
| 2783 | struct ieee80211_channel *channel) |
| 2784 | { |
Luis R. Rodriguez | 608b88c | 2009-08-17 18:07:23 -0700 | [diff] [blame] | 2785 | struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah); |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2786 | struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom; |
| 2787 | struct ath5k_edge_power *rep = ee->ee_ctl_pwr; |
| 2788 | u8 *ctl_val = ee->ee_ctl; |
| 2789 | s16 max_chan_pwr = ah->ah_txpower.txp_max_pwr / 4; |
| 2790 | s16 edge_pwr = 0; |
| 2791 | u8 rep_idx; |
| 2792 | u8 i, ctl_mode; |
| 2793 | u8 ctl_idx = 0xFF; |
| 2794 | u32 target = channel->center_freq; |
| 2795 | |
Luis R. Rodriguez | 608b88c | 2009-08-17 18:07:23 -0700 | [diff] [blame] | 2796 | ctl_mode = ath_regd_get_band_ctl(regulatory, channel->band); |
Bob Copeland | 6752ee9 | 2009-04-30 15:55:51 -0400 | [diff] [blame] | 2797 | |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 2798 | switch (channel->hw_value) { |
| 2799 | case AR5K_MODE_11A: |
Nick Kossifidis | acb091d | 2010-11-23 21:49:53 +0200 | [diff] [blame] | 2800 | if (ah->ah_bwmode == AR5K_BWMODE_40MHZ) |
| 2801 | ctl_mode |= AR5K_CTL_TURBO; |
| 2802 | else |
| 2803 | ctl_mode |= AR5K_CTL_11A; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2804 | break; |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 2805 | case AR5K_MODE_11G: |
Nick Kossifidis | acb091d | 2010-11-23 21:49:53 +0200 | [diff] [blame] | 2806 | if (ah->ah_bwmode == AR5K_BWMODE_40MHZ) |
| 2807 | ctl_mode |= AR5K_CTL_TURBOG; |
| 2808 | else |
| 2809 | ctl_mode |= AR5K_CTL_11G; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2810 | break; |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 2811 | case AR5K_MODE_11B: |
Bob Copeland | 6752ee9 | 2009-04-30 15:55:51 -0400 | [diff] [blame] | 2812 | ctl_mode |= AR5K_CTL_11B; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2813 | break; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2814 | default: |
| 2815 | return; |
| 2816 | } |
Nick Kossifidis | 903b474 | 2008-02-28 14:50:50 -0500 | [diff] [blame] | 2817 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2818 | for (i = 0; i < ee->ee_ctls; i++) { |
| 2819 | if (ctl_val[i] == ctl_mode) { |
| 2820 | ctl_idx = i; |
| 2821 | break; |
| 2822 | } |
| 2823 | } |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 2824 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2825 | /* If we have a CTL dataset available grab it and find the |
| 2826 | * edge power for our frequency */ |
| 2827 | if (ctl_idx == 0xFF) |
| 2828 | return; |
| 2829 | |
| 2830 | /* Edge powers are sorted by frequency from lower |
| 2831 | * to higher. Each CTL corresponds to 8 edge power |
| 2832 | * measurements. */ |
| 2833 | rep_idx = ctl_idx * AR5K_EEPROM_N_EDGES; |
| 2834 | |
| 2835 | /* Don't do boundaries check because we |
| 2836 | * might have more that one bands defined |
| 2837 | * for this mode */ |
| 2838 | |
| 2839 | /* Get the edge power that's closer to our |
| 2840 | * frequency */ |
| 2841 | for (i = 0; i < AR5K_EEPROM_N_EDGES; i++) { |
| 2842 | rep_idx += i; |
| 2843 | if (target <= rep[rep_idx].freq) |
| 2844 | edge_pwr = (s16) rep[rep_idx].edge; |
| 2845 | } |
| 2846 | |
| 2847 | if (edge_pwr) |
Pavel Roskin | e4bbf2f | 2011-07-07 18:14:13 -0400 | [diff] [blame] | 2848 | ah->ah_txpower.txp_max_pwr = 4 * min(edge_pwr, max_chan_pwr); |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2849 | } |
| 2850 | |
| 2851 | |
| 2852 | /* |
| 2853 | * Power to PCDAC table functions |
| 2854 | */ |
| 2855 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 2856 | /** |
| 2857 | * DOC: Power to PCDAC table functions |
| 2858 | * |
| 2859 | * For RF5111 we have an XPD -eXternal Power Detector- curve |
| 2860 | * for each calibrated channel. Each curve has 0,5dB Power steps |
| 2861 | * on x axis and PCDAC steps (offsets) on y axis and looks like an |
| 2862 | * exponential function. To recreate the curve we read 11 points |
| 2863 | * from eeprom (eeprom.c) and interpolate here. |
| 2864 | * |
| 2865 | * For RF5112 we have 4 XPD -eXternal Power Detector- curves |
| 2866 | * for each calibrated channel on 0, -6, -12 and -18dBm but we only |
| 2867 | * use the higher (3) and the lower (0) curves. Each curve again has 0.5dB |
| 2868 | * power steps on x axis and PCDAC steps on y axis and looks like a |
| 2869 | * linear function. To recreate the curve and pass the power values |
| 2870 | * on hw, we get 4 points for xpd 0 (lower gain -> max power) |
| 2871 | * and 3 points for xpd 3 (higher gain -> lower power) from eeprom (eeprom.c) |
| 2872 | * and interpolate here. |
| 2873 | * |
| 2874 | * For a given channel we get the calibrated points (piers) for it or |
| 2875 | * -if we don't have calibration data for this specific channel- from the |
| 2876 | * available surrounding channels we have calibration data for, after we do a |
| 2877 | * linear interpolation between them. Then since we have our calibrated points |
| 2878 | * for this channel, we do again a linear interpolation between them to get the |
| 2879 | * whole curve. |
| 2880 | * |
| 2881 | * We finally write the Y values of the curve(s) (the PCDAC values) on hw |
| 2882 | */ |
| 2883 | |
| 2884 | /** |
| 2885 | * ath5k_fill_pwr_to_pcdac_table() - Fill Power to PCDAC table on RF5111 |
| 2886 | * @ah: The &struct ath5k_hw |
| 2887 | * @table_min: Minimum power (x min) |
| 2888 | * @table_max: Maximum power (x max) |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2889 | * |
| 2890 | * No further processing is needed for RF5111, the only thing we have to |
| 2891 | * do is fill the values below and above calibration range since eeprom data |
| 2892 | * may not cover the entire PCDAC table. |
| 2893 | */ |
| 2894 | static void |
| 2895 | ath5k_fill_pwr_to_pcdac_table(struct ath5k_hw *ah, s16* table_min, |
| 2896 | s16 *table_max) |
| 2897 | { |
Pavel Roskin | 0a5d381 | 2011-07-07 18:13:24 -0400 | [diff] [blame] | 2898 | u8 *pcdac_out = ah->ah_txpower.txp_pd_table; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2899 | u8 *pcdac_tmp = ah->ah_txpower.tmpL[0]; |
| 2900 | u8 pcdac_0, pcdac_n, pcdac_i, pwr_idx, i; |
| 2901 | s16 min_pwr, max_pwr; |
| 2902 | |
| 2903 | /* Get table boundaries */ |
| 2904 | min_pwr = table_min[0]; |
| 2905 | pcdac_0 = pcdac_tmp[0]; |
| 2906 | |
| 2907 | max_pwr = table_max[0]; |
| 2908 | pcdac_n = pcdac_tmp[table_max[0] - table_min[0]]; |
| 2909 | |
| 2910 | /* Extrapolate below minimum using pcdac_0 */ |
| 2911 | pcdac_i = 0; |
| 2912 | for (i = 0; i < min_pwr; i++) |
| 2913 | pcdac_out[pcdac_i++] = pcdac_0; |
| 2914 | |
| 2915 | /* Copy values from pcdac_tmp */ |
| 2916 | pwr_idx = min_pwr; |
Pavel Roskin | e4bbf2f | 2011-07-07 18:14:13 -0400 | [diff] [blame] | 2917 | for (i = 0; pwr_idx <= max_pwr && |
| 2918 | pcdac_i < AR5K_EEPROM_POWER_TABLE_SIZE; i++) { |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2919 | pcdac_out[pcdac_i++] = pcdac_tmp[i]; |
| 2920 | pwr_idx++; |
| 2921 | } |
| 2922 | |
| 2923 | /* Extrapolate above maximum */ |
| 2924 | while (pcdac_i < AR5K_EEPROM_POWER_TABLE_SIZE) |
| 2925 | pcdac_out[pcdac_i++] = pcdac_n; |
| 2926 | |
| 2927 | } |
| 2928 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 2929 | /** |
| 2930 | * ath5k_combine_linear_pcdac_curves() - Combine available PCDAC Curves |
| 2931 | * @ah: The &struct ath5k_hw |
| 2932 | * @table_min: Minimum power (x min) |
| 2933 | * @table_max: Maximum power (x max) |
| 2934 | * @pdcurves: Number of pd curves |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2935 | * |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 2936 | * Combine available XPD Curves and fill Linear Power to PCDAC table on RF5112 |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2937 | * RFX112 can have up to 2 curves (one for low txpower range and one for |
| 2938 | * higher txpower range). We need to put them both on pcdac_out and place |
| 2939 | * them in the correct location. In case we only have one curve available |
| 2940 | * just fit it on pcdac_out (it's supposed to cover the entire range of |
| 2941 | * available pwr levels since it's always the higher power curve). Extrapolate |
| 2942 | * below and above final table if needed. |
| 2943 | */ |
| 2944 | static void |
| 2945 | ath5k_combine_linear_pcdac_curves(struct ath5k_hw *ah, s16* table_min, |
| 2946 | s16 *table_max, u8 pdcurves) |
| 2947 | { |
Pavel Roskin | 0a5d381 | 2011-07-07 18:13:24 -0400 | [diff] [blame] | 2948 | u8 *pcdac_out = ah->ah_txpower.txp_pd_table; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2949 | u8 *pcdac_low_pwr; |
| 2950 | u8 *pcdac_high_pwr; |
| 2951 | u8 *pcdac_tmp; |
| 2952 | u8 pwr; |
| 2953 | s16 max_pwr_idx; |
| 2954 | s16 min_pwr_idx; |
| 2955 | s16 mid_pwr_idx = 0; |
Pavel Roskin | 6a2a0e7 | 2011-07-09 00:17:51 -0400 | [diff] [blame] | 2956 | /* Edge flag turns on the 7nth bit on the PCDAC |
| 2957 | * to declare the higher power curve (force values |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2958 | * to be greater than 64). If we only have one curve |
| 2959 | * we don't need to set this, if we have 2 curves and |
| 2960 | * fill the table backwards this can also be used to |
| 2961 | * switch from higher power curve to lower power curve */ |
| 2962 | u8 edge_flag; |
| 2963 | int i; |
| 2964 | |
| 2965 | /* When we have only one curve available |
| 2966 | * that's the higher power curve. If we have |
| 2967 | * two curves the first is the high power curve |
| 2968 | * and the next is the low power curve. */ |
| 2969 | if (pdcurves > 1) { |
| 2970 | pcdac_low_pwr = ah->ah_txpower.tmpL[1]; |
| 2971 | pcdac_high_pwr = ah->ah_txpower.tmpL[0]; |
| 2972 | mid_pwr_idx = table_max[1] - table_min[1] - 1; |
| 2973 | max_pwr_idx = (table_max[0] - table_min[0]) / 2; |
| 2974 | |
| 2975 | /* If table size goes beyond 31.5dB, keep the |
| 2976 | * upper 31.5dB range when setting tx power. |
| 2977 | * Note: 126 = 31.5 dB in quarter dB steps */ |
| 2978 | if (table_max[0] - table_min[1] > 126) |
| 2979 | min_pwr_idx = table_max[0] - 126; |
| 2980 | else |
| 2981 | min_pwr_idx = table_min[1]; |
| 2982 | |
| 2983 | /* Since we fill table backwards |
| 2984 | * start from high power curve */ |
| 2985 | pcdac_tmp = pcdac_high_pwr; |
| 2986 | |
| 2987 | edge_flag = 0x40; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2988 | } else { |
| 2989 | pcdac_low_pwr = ah->ah_txpower.tmpL[1]; /* Zeroed */ |
| 2990 | pcdac_high_pwr = ah->ah_txpower.tmpL[0]; |
| 2991 | min_pwr_idx = table_min[0]; |
| 2992 | max_pwr_idx = (table_max[0] - table_min[0]) / 2; |
| 2993 | pcdac_tmp = pcdac_high_pwr; |
| 2994 | edge_flag = 0; |
| 2995 | } |
| 2996 | |
| 2997 | /* This is used when setting tx power*/ |
Pavel Roskin | e4bbf2f | 2011-07-07 18:14:13 -0400 | [diff] [blame] | 2998 | ah->ah_txpower.txp_min_idx = min_pwr_idx / 2; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 2999 | |
| 3000 | /* Fill Power to PCDAC table backwards */ |
| 3001 | pwr = max_pwr_idx; |
| 3002 | for (i = 63; i >= 0; i--) { |
| 3003 | /* Entering lower power range, reset |
| 3004 | * edge flag and set pcdac_tmp to lower |
| 3005 | * power curve.*/ |
| 3006 | if (edge_flag == 0x40 && |
Pavel Roskin | e4bbf2f | 2011-07-07 18:14:13 -0400 | [diff] [blame] | 3007 | (2 * pwr <= (table_max[1] - table_min[0]) || pwr == 0)) { |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3008 | edge_flag = 0x00; |
| 3009 | pcdac_tmp = pcdac_low_pwr; |
Pavel Roskin | e4bbf2f | 2011-07-07 18:14:13 -0400 | [diff] [blame] | 3010 | pwr = mid_pwr_idx / 2; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3011 | } |
| 3012 | |
| 3013 | /* Don't go below 1, extrapolate below if we have |
Pavel Roskin | 6a2a0e7 | 2011-07-09 00:17:51 -0400 | [diff] [blame] | 3014 | * already switched to the lower power curve -or |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3015 | * we only have one curve and edge_flag is zero |
| 3016 | * anyway */ |
| 3017 | if (pcdac_tmp[pwr] < 1 && (edge_flag == 0x00)) { |
| 3018 | while (i >= 0) { |
| 3019 | pcdac_out[i] = pcdac_out[i + 1]; |
| 3020 | i--; |
| 3021 | } |
| 3022 | break; |
| 3023 | } |
| 3024 | |
| 3025 | pcdac_out[i] = pcdac_tmp[pwr] | edge_flag; |
| 3026 | |
| 3027 | /* Extrapolate above if pcdac is greater than |
| 3028 | * 126 -this can happen because we OR pcdac_out |
| 3029 | * value with edge_flag on high power curve */ |
| 3030 | if (pcdac_out[i] > 126) |
| 3031 | pcdac_out[i] = 126; |
| 3032 | |
| 3033 | /* Decrease by a 0.5dB step */ |
| 3034 | pwr--; |
| 3035 | } |
| 3036 | } |
| 3037 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 3038 | /** |
| 3039 | * ath5k_write_pcdac_table() - Write the PCDAC values on hw |
| 3040 | * @ah: The &struct ath5k_hw |
| 3041 | */ |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3042 | static void |
Bruno Randolf | 56bd29d | 2010-12-21 17:30:26 +0900 | [diff] [blame] | 3043 | ath5k_write_pcdac_table(struct ath5k_hw *ah) |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3044 | { |
Pavel Roskin | 0a5d381 | 2011-07-07 18:13:24 -0400 | [diff] [blame] | 3045 | u8 *pcdac_out = ah->ah_txpower.txp_pd_table; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3046 | int i; |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 3047 | |
| 3048 | /* |
| 3049 | * Write TX power values |
| 3050 | */ |
| 3051 | for (i = 0; i < (AR5K_EEPROM_POWER_TABLE_SIZE / 2); i++) { |
| 3052 | ath5k_hw_reg_write(ah, |
Pavel Roskin | e4bbf2f | 2011-07-07 18:14:13 -0400 | [diff] [blame] | 3053 | (((pcdac_out[2 * i + 0] << 8 | 0xff) & 0xffff) << 0) | |
| 3054 | (((pcdac_out[2 * i + 1] << 8 | 0xff) & 0xffff) << 16), |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 3055 | AR5K_PHY_PCDAC_TXPOWER(i)); |
| 3056 | } |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3057 | } |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 3058 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3059 | |
| 3060 | /* |
| 3061 | * Power to PDADC table functions |
| 3062 | */ |
| 3063 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 3064 | /** |
| 3065 | * DOC: Power to PDADC table functions |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3066 | * |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 3067 | * For RF2413 and later we have a Power to PDADC table (Power Detector) |
| 3068 | * instead of a PCDAC (Power Control) and 4 pd gain curves for each |
| 3069 | * calibrated channel. Each curve has power on x axis in 0.5 db steps and |
| 3070 | * PDADC steps on y axis and looks like an exponential function like the |
| 3071 | * RF5111 curve. |
| 3072 | * |
| 3073 | * To recreate the curves we read the points from eeprom (eeprom.c) |
| 3074 | * and interpolate here. Note that in most cases only 2 (higher and lower) |
| 3075 | * curves are used (like RF5112) but vendors have the opportunity to include |
| 3076 | * all 4 curves on eeprom. The final curve (higher power) has an extra |
| 3077 | * point for better accuracy like RF5112. |
| 3078 | * |
| 3079 | * The process is similar to what we do above for RF5111/5112 |
| 3080 | */ |
| 3081 | |
| 3082 | /** |
| 3083 | * ath5k_combine_pwr_to_pdadc_curves() - Combine the various PDADC curves |
| 3084 | * @ah: The &struct ath5k_hw |
| 3085 | * @pwr_min: Minimum power (x min) |
| 3086 | * @pwr_max: Maximum power (x max) |
| 3087 | * @pdcurves: Number of available curves |
| 3088 | * |
| 3089 | * Combine the various pd curves and create the final Power to PDADC table |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3090 | * We can have up to 4 pd curves, we need to do a similar process |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3091 | * as we do for RF5112. This time we don't have an edge_flag but we |
| 3092 | * set the gain boundaries on a separate register. |
| 3093 | */ |
| 3094 | static void |
| 3095 | ath5k_combine_pwr_to_pdadc_curves(struct ath5k_hw *ah, |
| 3096 | s16 *pwr_min, s16 *pwr_max, u8 pdcurves) |
| 3097 | { |
| 3098 | u8 gain_boundaries[AR5K_EEPROM_N_PD_GAINS]; |
| 3099 | u8 *pdadc_out = ah->ah_txpower.txp_pd_table; |
| 3100 | u8 *pdadc_tmp; |
| 3101 | s16 pdadc_0; |
| 3102 | u8 pdadc_i, pdadc_n, pwr_step, pdg, max_idx, table_size; |
| 3103 | u8 pd_gain_overlap; |
| 3104 | |
| 3105 | /* Note: Register value is initialized on initvals |
| 3106 | * there is no feedback from hw. |
| 3107 | * XXX: What about pd_gain_overlap from EEPROM ? */ |
| 3108 | pd_gain_overlap = (u8) ath5k_hw_reg_read(ah, AR5K_PHY_TPC_RG5) & |
| 3109 | AR5K_PHY_TPC_RG5_PD_GAIN_OVERLAP; |
| 3110 | |
| 3111 | /* Create final PDADC table */ |
| 3112 | for (pdg = 0, pdadc_i = 0; pdg < pdcurves; pdg++) { |
| 3113 | pdadc_tmp = ah->ah_txpower.tmpL[pdg]; |
| 3114 | |
| 3115 | if (pdg == pdcurves - 1) |
| 3116 | /* 2 dB boundary stretch for last |
| 3117 | * (higher power) curve */ |
| 3118 | gain_boundaries[pdg] = pwr_max[pdg] + 4; |
| 3119 | else |
| 3120 | /* Set gain boundary in the middle |
| 3121 | * between this curve and the next one */ |
| 3122 | gain_boundaries[pdg] = |
| 3123 | (pwr_max[pdg] + pwr_min[pdg + 1]) / 2; |
| 3124 | |
| 3125 | /* Sanity check in case our 2 db stretch got out of |
| 3126 | * range. */ |
| 3127 | if (gain_boundaries[pdg] > AR5K_TUNE_MAX_TXPOWER) |
| 3128 | gain_boundaries[pdg] = AR5K_TUNE_MAX_TXPOWER; |
| 3129 | |
| 3130 | /* For the first curve (lower power) |
| 3131 | * start from 0 dB */ |
| 3132 | if (pdg == 0) |
| 3133 | pdadc_0 = 0; |
| 3134 | else |
| 3135 | /* For the other curves use the gain overlap */ |
| 3136 | pdadc_0 = (gain_boundaries[pdg - 1] - pwr_min[pdg]) - |
| 3137 | pd_gain_overlap; |
| 3138 | |
| 3139 | /* Force each power step to be at least 0.5 dB */ |
| 3140 | if ((pdadc_tmp[1] - pdadc_tmp[0]) > 1) |
| 3141 | pwr_step = pdadc_tmp[1] - pdadc_tmp[0]; |
| 3142 | else |
| 3143 | pwr_step = 1; |
| 3144 | |
| 3145 | /* If pdadc_0 is negative, we need to extrapolate |
| 3146 | * below this pdgain by a number of pwr_steps */ |
| 3147 | while ((pdadc_0 < 0) && (pdadc_i < 128)) { |
| 3148 | s16 tmp = pdadc_tmp[0] + pdadc_0 * pwr_step; |
| 3149 | pdadc_out[pdadc_i++] = (tmp < 0) ? 0 : (u8) tmp; |
| 3150 | pdadc_0++; |
| 3151 | } |
| 3152 | |
| 3153 | /* Set last pwr level, using gain boundaries */ |
| 3154 | pdadc_n = gain_boundaries[pdg] + pd_gain_overlap - pwr_min[pdg]; |
| 3155 | /* Limit it to be inside pwr range */ |
| 3156 | table_size = pwr_max[pdg] - pwr_min[pdg]; |
| 3157 | max_idx = (pdadc_n < table_size) ? pdadc_n : table_size; |
| 3158 | |
| 3159 | /* Fill pdadc_out table */ |
Bob Copeland | 4f59fce | 2010-04-07 23:55:59 -0400 | [diff] [blame] | 3160 | while (pdadc_0 < max_idx && pdadc_i < 128) |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3161 | pdadc_out[pdadc_i++] = pdadc_tmp[pdadc_0++]; |
| 3162 | |
| 3163 | /* Need to extrapolate above this pdgain? */ |
| 3164 | if (pdadc_n <= max_idx) |
| 3165 | continue; |
| 3166 | |
| 3167 | /* Force each power step to be at least 0.5 dB */ |
| 3168 | if ((pdadc_tmp[table_size - 1] - pdadc_tmp[table_size - 2]) > 1) |
| 3169 | pwr_step = pdadc_tmp[table_size - 1] - |
| 3170 | pdadc_tmp[table_size - 2]; |
| 3171 | else |
| 3172 | pwr_step = 1; |
| 3173 | |
| 3174 | /* Extrapolate above */ |
| 3175 | while ((pdadc_0 < (s16) pdadc_n) && |
| 3176 | (pdadc_i < AR5K_EEPROM_POWER_TABLE_SIZE * 2)) { |
| 3177 | s16 tmp = pdadc_tmp[table_size - 1] + |
| 3178 | (pdadc_0 - max_idx) * pwr_step; |
| 3179 | pdadc_out[pdadc_i++] = (tmp > 127) ? 127 : (u8) tmp; |
| 3180 | pdadc_0++; |
| 3181 | } |
| 3182 | } |
| 3183 | |
| 3184 | while (pdg < AR5K_EEPROM_N_PD_GAINS) { |
| 3185 | gain_boundaries[pdg] = gain_boundaries[pdg - 1]; |
| 3186 | pdg++; |
| 3187 | } |
| 3188 | |
| 3189 | while (pdadc_i < AR5K_EEPROM_POWER_TABLE_SIZE * 2) { |
| 3190 | pdadc_out[pdadc_i] = pdadc_out[pdadc_i - 1]; |
| 3191 | pdadc_i++; |
| 3192 | } |
| 3193 | |
| 3194 | /* Set gain boundaries */ |
| 3195 | ath5k_hw_reg_write(ah, |
| 3196 | AR5K_REG_SM(pd_gain_overlap, |
| 3197 | AR5K_PHY_TPC_RG5_PD_GAIN_OVERLAP) | |
| 3198 | AR5K_REG_SM(gain_boundaries[0], |
| 3199 | AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_1) | |
| 3200 | AR5K_REG_SM(gain_boundaries[1], |
| 3201 | AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_2) | |
| 3202 | AR5K_REG_SM(gain_boundaries[2], |
| 3203 | AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_3) | |
| 3204 | AR5K_REG_SM(gain_boundaries[3], |
| 3205 | AR5K_PHY_TPC_RG5_PD_GAIN_BOUNDARY_4), |
| 3206 | AR5K_PHY_TPC_RG5); |
| 3207 | |
| 3208 | /* Used for setting rate power table */ |
| 3209 | ah->ah_txpower.txp_min_idx = pwr_min[0]; |
| 3210 | |
| 3211 | } |
| 3212 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 3213 | /** |
| 3214 | * ath5k_write_pwr_to_pdadc_table() - Write the PDADC values on hw |
| 3215 | * @ah: The &struct ath5k_hw |
| 3216 | * @ee_mode: One of enum ath5k_driver_mode |
| 3217 | */ |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3218 | static void |
Bruno Randolf | 56bd29d | 2010-12-21 17:30:26 +0900 | [diff] [blame] | 3219 | ath5k_write_pwr_to_pdadc_table(struct ath5k_hw *ah, u8 ee_mode) |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3220 | { |
Nick Kossifidis | d84938c | 2010-12-03 06:03:00 +0200 | [diff] [blame] | 3221 | struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3222 | u8 *pdadc_out = ah->ah_txpower.txp_pd_table; |
Nick Kossifidis | d84938c | 2010-12-03 06:03:00 +0200 | [diff] [blame] | 3223 | u8 *pdg_to_idx = ee->ee_pdc_to_idx[ee_mode]; |
| 3224 | u8 pdcurves = ee->ee_pd_gains[ee_mode]; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3225 | u32 reg; |
| 3226 | u8 i; |
| 3227 | |
| 3228 | /* Select the right pdgain curves */ |
| 3229 | |
| 3230 | /* Clear current settings */ |
| 3231 | reg = ath5k_hw_reg_read(ah, AR5K_PHY_TPC_RG1); |
| 3232 | reg &= ~(AR5K_PHY_TPC_RG1_PDGAIN_1 | |
| 3233 | AR5K_PHY_TPC_RG1_PDGAIN_2 | |
| 3234 | AR5K_PHY_TPC_RG1_PDGAIN_3 | |
| 3235 | AR5K_PHY_TPC_RG1_NUM_PD_GAIN); |
| 3236 | |
| 3237 | /* |
| 3238 | * Use pd_gains curve from eeprom |
| 3239 | * |
| 3240 | * This overrides the default setting from initvals |
| 3241 | * in case some vendors (e.g. Zcomax) don't use the default |
| 3242 | * curves. If we don't honor their settings we 'll get a |
| 3243 | * 5dB (1 * gain overlap ?) drop. |
| 3244 | */ |
| 3245 | reg |= AR5K_REG_SM(pdcurves, AR5K_PHY_TPC_RG1_NUM_PD_GAIN); |
| 3246 | |
| 3247 | switch (pdcurves) { |
| 3248 | case 3: |
| 3249 | reg |= AR5K_REG_SM(pdg_to_idx[2], AR5K_PHY_TPC_RG1_PDGAIN_3); |
| 3250 | /* Fall through */ |
| 3251 | case 2: |
| 3252 | reg |= AR5K_REG_SM(pdg_to_idx[1], AR5K_PHY_TPC_RG1_PDGAIN_2); |
| 3253 | /* Fall through */ |
| 3254 | case 1: |
| 3255 | reg |= AR5K_REG_SM(pdg_to_idx[0], AR5K_PHY_TPC_RG1_PDGAIN_1); |
| 3256 | break; |
| 3257 | } |
| 3258 | ath5k_hw_reg_write(ah, reg, AR5K_PHY_TPC_RG1); |
| 3259 | |
| 3260 | /* |
| 3261 | * Write TX power values |
| 3262 | */ |
| 3263 | for (i = 0; i < (AR5K_EEPROM_POWER_TABLE_SIZE / 2); i++) { |
Pavel Roskin | bb78c71 | 2011-07-21 13:36:42 -0400 | [diff] [blame] | 3264 | u32 val = get_unaligned_le32(&pdadc_out[4 * i]); |
| 3265 | ath5k_hw_reg_write(ah, val, AR5K_PHY_PDADC_TXPOWER(i)); |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3266 | } |
| 3267 | } |
| 3268 | |
| 3269 | |
| 3270 | /* |
| 3271 | * Common code for PCDAC/PDADC tables |
| 3272 | */ |
| 3273 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 3274 | /** |
| 3275 | * ath5k_setup_channel_powertable() - Set up power table for this channel |
| 3276 | * @ah: The &struct ath5k_hw |
| 3277 | * @channel: The &struct ieee80211_channel |
| 3278 | * @ee_mode: One of enum ath5k_driver_mode |
| 3279 | * @type: One of enum ath5k_powertable_type (eeprom.h) |
| 3280 | * |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3281 | * This is the main function that uses all of the above |
| 3282 | * to set PCDAC/PDADC table on hw for the current channel. |
Pavel Roskin | 6a2a0e7 | 2011-07-09 00:17:51 -0400 | [diff] [blame] | 3283 | * This table is used for tx power calibration on the baseband, |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3284 | * without it we get weird tx power levels and in some cases |
| 3285 | * distorted spectral mask |
| 3286 | */ |
| 3287 | static int |
| 3288 | ath5k_setup_channel_powertable(struct ath5k_hw *ah, |
| 3289 | struct ieee80211_channel *channel, |
| 3290 | u8 ee_mode, u8 type) |
| 3291 | { |
| 3292 | struct ath5k_pdgain_info *pdg_L, *pdg_R; |
| 3293 | struct ath5k_chan_pcal_info *pcinfo_L; |
| 3294 | struct ath5k_chan_pcal_info *pcinfo_R; |
| 3295 | struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom; |
| 3296 | u8 *pdg_curve_to_idx = ee->ee_pdc_to_idx[ee_mode]; |
| 3297 | s16 table_min[AR5K_EEPROM_N_PD_GAINS]; |
| 3298 | s16 table_max[AR5K_EEPROM_N_PD_GAINS]; |
| 3299 | u8 *tmpL; |
| 3300 | u8 *tmpR; |
| 3301 | u32 target = channel->center_freq; |
| 3302 | int pdg, i; |
| 3303 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3304 | /* Get surrounding freq piers for this channel */ |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3305 | ath5k_get_chan_pcal_surrounding_piers(ah, channel, |
| 3306 | &pcinfo_L, |
| 3307 | &pcinfo_R); |
| 3308 | |
| 3309 | /* Loop over pd gain curves on |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3310 | * surrounding freq piers by index */ |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3311 | for (pdg = 0; pdg < ee->ee_pd_gains[ee_mode]; pdg++) { |
| 3312 | |
| 3313 | /* Fill curves in reverse order |
| 3314 | * from lower power (max gain) |
| 3315 | * to higher power. Use curve -> idx |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 3316 | * backmapping we did on eeprom init */ |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3317 | u8 idx = pdg_curve_to_idx[pdg]; |
| 3318 | |
| 3319 | /* Grab the needed curves by index */ |
| 3320 | pdg_L = &pcinfo_L->pd_curves[idx]; |
| 3321 | pdg_R = &pcinfo_R->pd_curves[idx]; |
| 3322 | |
| 3323 | /* Initialize the temp tables */ |
| 3324 | tmpL = ah->ah_txpower.tmpL[pdg]; |
| 3325 | tmpR = ah->ah_txpower.tmpR[pdg]; |
| 3326 | |
| 3327 | /* Set curve's x boundaries and create |
| 3328 | * curves so that they cover the same |
| 3329 | * range (if we don't do that one table |
| 3330 | * will have values on some range and the |
| 3331 | * other one won't have any so interpolation |
| 3332 | * will fail) */ |
| 3333 | table_min[pdg] = min(pdg_L->pd_pwr[0], |
| 3334 | pdg_R->pd_pwr[0]) / 2; |
| 3335 | |
| 3336 | table_max[pdg] = max(pdg_L->pd_pwr[pdg_L->pd_points - 1], |
| 3337 | pdg_R->pd_pwr[pdg_R->pd_points - 1]) / 2; |
| 3338 | |
| 3339 | /* Now create the curves on surrounding channels |
| 3340 | * and interpolate if needed to get the final |
| 3341 | * curve for this gain on this channel */ |
| 3342 | switch (type) { |
| 3343 | case AR5K_PWRTABLE_LINEAR_PCDAC: |
| 3344 | /* Override min/max so that we don't loose |
| 3345 | * accuracy (don't divide by 2) */ |
| 3346 | table_min[pdg] = min(pdg_L->pd_pwr[0], |
| 3347 | pdg_R->pd_pwr[0]); |
| 3348 | |
| 3349 | table_max[pdg] = |
| 3350 | max(pdg_L->pd_pwr[pdg_L->pd_points - 1], |
| 3351 | pdg_R->pd_pwr[pdg_R->pd_points - 1]); |
| 3352 | |
| 3353 | /* Override minimum so that we don't get |
| 3354 | * out of bounds while extrapolating |
| 3355 | * below. Don't do this when we have 2 |
| 3356 | * curves and we are on the high power curve |
| 3357 | * because table_min is ok in this case */ |
| 3358 | if (!(ee->ee_pd_gains[ee_mode] > 1 && pdg == 0)) { |
| 3359 | |
| 3360 | table_min[pdg] = |
| 3361 | ath5k_get_linear_pcdac_min(pdg_L->pd_step, |
| 3362 | pdg_R->pd_step, |
| 3363 | pdg_L->pd_pwr, |
| 3364 | pdg_R->pd_pwr); |
| 3365 | |
| 3366 | /* Don't go too low because we will |
| 3367 | * miss the upper part of the curve. |
| 3368 | * Note: 126 = 31.5dB (max power supported) |
| 3369 | * in 0.25dB units */ |
| 3370 | if (table_max[pdg] - table_min[pdg] > 126) |
| 3371 | table_min[pdg] = table_max[pdg] - 126; |
| 3372 | } |
| 3373 | |
| 3374 | /* Fall through */ |
| 3375 | case AR5K_PWRTABLE_PWR_TO_PCDAC: |
| 3376 | case AR5K_PWRTABLE_PWR_TO_PDADC: |
| 3377 | |
| 3378 | ath5k_create_power_curve(table_min[pdg], |
| 3379 | table_max[pdg], |
| 3380 | pdg_L->pd_pwr, |
| 3381 | pdg_L->pd_step, |
| 3382 | pdg_L->pd_points, tmpL, type); |
| 3383 | |
| 3384 | /* We are in a calibration |
| 3385 | * pier, no need to interpolate |
| 3386 | * between freq piers */ |
| 3387 | if (pcinfo_L == pcinfo_R) |
| 3388 | continue; |
| 3389 | |
| 3390 | ath5k_create_power_curve(table_min[pdg], |
| 3391 | table_max[pdg], |
| 3392 | pdg_R->pd_pwr, |
| 3393 | pdg_R->pd_step, |
| 3394 | pdg_R->pd_points, tmpR, type); |
| 3395 | break; |
| 3396 | default: |
| 3397 | return -EINVAL; |
| 3398 | } |
| 3399 | |
| 3400 | /* Interpolate between curves |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3401 | * of surrounding freq piers to |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3402 | * get the final curve for this |
| 3403 | * pd gain. Re-use tmpL for interpolation |
| 3404 | * output */ |
| 3405 | for (i = 0; (i < (u16) (table_max[pdg] - table_min[pdg])) && |
| 3406 | (i < AR5K_EEPROM_POWER_TABLE_SIZE); i++) { |
| 3407 | tmpL[i] = (u8) ath5k_get_interpolated_value(target, |
| 3408 | (s16) pcinfo_L->freq, |
| 3409 | (s16) pcinfo_R->freq, |
| 3410 | (s16) tmpL[i], |
| 3411 | (s16) tmpR[i]); |
| 3412 | } |
| 3413 | } |
| 3414 | |
| 3415 | /* Now we have a set of curves for this |
| 3416 | * channel on tmpL (x range is table_max - table_min |
| 3417 | * and y values are tmpL[pdg][]) sorted in the same |
André Goddard Rosa | af901ca | 2009-11-14 13:09:05 -0200 | [diff] [blame] | 3418 | * order as EEPROM (because we've used the backmapping). |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3419 | * So for RF5112 it's from higher power to lower power |
| 3420 | * and for RF2413 it's from lower power to higher power. |
| 3421 | * For RF5111 we only have one curve. */ |
| 3422 | |
| 3423 | /* Fill min and max power levels for this |
| 3424 | * channel by interpolating the values on |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3425 | * surrounding channels to complete the dataset */ |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3426 | ah->ah_txpower.txp_min_pwr = ath5k_get_interpolated_value(target, |
| 3427 | (s16) pcinfo_L->freq, |
| 3428 | (s16) pcinfo_R->freq, |
| 3429 | pcinfo_L->min_pwr, pcinfo_R->min_pwr); |
| 3430 | |
| 3431 | ah->ah_txpower.txp_max_pwr = ath5k_get_interpolated_value(target, |
| 3432 | (s16) pcinfo_L->freq, |
| 3433 | (s16) pcinfo_R->freq, |
| 3434 | pcinfo_L->max_pwr, pcinfo_R->max_pwr); |
| 3435 | |
Bruno Randolf | 56bd29d | 2010-12-21 17:30:26 +0900 | [diff] [blame] | 3436 | /* Fill PCDAC/PDADC table */ |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3437 | switch (type) { |
| 3438 | case AR5K_PWRTABLE_LINEAR_PCDAC: |
| 3439 | /* For RF5112 we can have one or two curves |
| 3440 | * and each curve covers a certain power lvl |
| 3441 | * range so we need to do some more processing */ |
| 3442 | ath5k_combine_linear_pcdac_curves(ah, table_min, table_max, |
| 3443 | ee->ee_pd_gains[ee_mode]); |
| 3444 | |
| 3445 | /* Set txp.offset so that we can |
| 3446 | * match max power value with max |
| 3447 | * table index */ |
| 3448 | ah->ah_txpower.txp_offset = 64 - (table_max[0] / 2); |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3449 | break; |
| 3450 | case AR5K_PWRTABLE_PWR_TO_PCDAC: |
| 3451 | /* We are done for RF5111 since it has only |
| 3452 | * one curve, just fit the curve on the table */ |
| 3453 | ath5k_fill_pwr_to_pcdac_table(ah, table_min, table_max); |
| 3454 | |
| 3455 | /* No rate powertable adjustment for RF5111 */ |
| 3456 | ah->ah_txpower.txp_min_idx = 0; |
| 3457 | ah->ah_txpower.txp_offset = 0; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3458 | break; |
| 3459 | case AR5K_PWRTABLE_PWR_TO_PDADC: |
| 3460 | /* Set PDADC boundaries and fill |
| 3461 | * final PDADC table */ |
| 3462 | ath5k_combine_pwr_to_pdadc_curves(ah, table_min, table_max, |
| 3463 | ee->ee_pd_gains[ee_mode]); |
| 3464 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3465 | /* Set txp.offset, note that table_min |
| 3466 | * can be negative */ |
| 3467 | ah->ah_txpower.txp_offset = table_min[0]; |
| 3468 | break; |
| 3469 | default: |
| 3470 | return -EINVAL; |
| 3471 | } |
| 3472 | |
Bruno Randolf | 26c7fc4 | 2010-12-21 17:30:20 +0900 | [diff] [blame] | 3473 | ah->ah_txpower.txp_setup = true; |
| 3474 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3475 | return 0; |
| 3476 | } |
| 3477 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 3478 | /** |
| 3479 | * ath5k_write_channel_powertable() - Set power table for current channel on hw |
| 3480 | * @ah: The &struct ath5k_hw |
| 3481 | * @ee_mode: One of enum ath5k_driver_mode |
| 3482 | * @type: One of enum ath5k_powertable_type (eeprom.h) |
| 3483 | */ |
Bruno Randolf | 56bd29d | 2010-12-21 17:30:26 +0900 | [diff] [blame] | 3484 | static void |
| 3485 | ath5k_write_channel_powertable(struct ath5k_hw *ah, u8 ee_mode, u8 type) |
| 3486 | { |
| 3487 | if (type == AR5K_PWRTABLE_PWR_TO_PDADC) |
| 3488 | ath5k_write_pwr_to_pdadc_table(ah, ee_mode); |
| 3489 | else |
| 3490 | ath5k_write_pcdac_table(ah); |
| 3491 | } |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3492 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3493 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 3494 | /** |
| 3495 | * DOC: Per-rate tx power setting |
| 3496 | * |
| 3497 | * This is the code that sets the desired tx power limit (below |
| 3498 | * maximum) on hw for each rate (we also have TPC that sets |
| 3499 | * power per packet type). We do that by providing an index on the |
| 3500 | * PCDAC/PDADC table we set up above, for each rate. |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3501 | * |
| 3502 | * For now we only limit txpower based on maximum tx power |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 3503 | * supported by hw (what's inside rate_info) + conformance test |
| 3504 | * limits. We need to limit this even more, based on regulatory domain |
| 3505 | * etc to be safe. Normally this is done from above so we don't care |
| 3506 | * here, all we care is that the tx power we set will be O.K. |
| 3507 | * for the hw (e.g. won't create noise on PA etc). |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3508 | * |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 3509 | * Rate power table contains indices to PCDAC/PDADC table (0.5dB steps - |
| 3510 | * x values) and is indexed as follows: |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3511 | * rates[0] - rates[7] -> OFDM rates |
| 3512 | * rates[8] - rates[14] -> CCK rates |
| 3513 | * rates[15] -> XR rates (they all have the same power) |
| 3514 | */ |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 3515 | |
| 3516 | /** |
| 3517 | * ath5k_setup_rate_powertable() - Set up rate power table for a given tx power |
| 3518 | * @ah: The &struct ath5k_hw |
| 3519 | * @max_pwr: The maximum tx power requested in 0.5dB steps |
| 3520 | * @rate_info: The &struct ath5k_rate_pcal_info to fill |
| 3521 | * @ee_mode: One of enum ath5k_driver_mode |
| 3522 | */ |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3523 | static void |
| 3524 | ath5k_setup_rate_powertable(struct ath5k_hw *ah, u16 max_pwr, |
| 3525 | struct ath5k_rate_pcal_info *rate_info, |
| 3526 | u8 ee_mode) |
| 3527 | { |
| 3528 | unsigned int i; |
| 3529 | u16 *rates; |
| 3530 | |
| 3531 | /* max_pwr is power level we got from driver/user in 0.5dB |
| 3532 | * units, switch to 0.25dB units so we can compare */ |
| 3533 | max_pwr *= 2; |
| 3534 | max_pwr = min(max_pwr, (u16) ah->ah_txpower.txp_max_pwr) / 2; |
| 3535 | |
| 3536 | /* apply rate limits */ |
| 3537 | rates = ah->ah_txpower.txp_rates_power_table; |
| 3538 | |
| 3539 | /* OFDM rates 6 to 24Mb/s */ |
| 3540 | for (i = 0; i < 5; i++) |
| 3541 | rates[i] = min(max_pwr, rate_info->target_power_6to24); |
| 3542 | |
| 3543 | /* Rest OFDM rates */ |
| 3544 | rates[5] = min(rates[0], rate_info->target_power_36); |
| 3545 | rates[6] = min(rates[0], rate_info->target_power_48); |
| 3546 | rates[7] = min(rates[0], rate_info->target_power_54); |
| 3547 | |
| 3548 | /* CCK rates */ |
| 3549 | /* 1L */ |
| 3550 | rates[8] = min(rates[0], rate_info->target_power_6to24); |
| 3551 | /* 2L */ |
| 3552 | rates[9] = min(rates[0], rate_info->target_power_36); |
| 3553 | /* 2S */ |
| 3554 | rates[10] = min(rates[0], rate_info->target_power_36); |
| 3555 | /* 5L */ |
| 3556 | rates[11] = min(rates[0], rate_info->target_power_48); |
| 3557 | /* 5S */ |
| 3558 | rates[12] = min(rates[0], rate_info->target_power_48); |
| 3559 | /* 11L */ |
| 3560 | rates[13] = min(rates[0], rate_info->target_power_54); |
| 3561 | /* 11S */ |
| 3562 | rates[14] = min(rates[0], rate_info->target_power_54); |
| 3563 | |
| 3564 | /* XR rates */ |
| 3565 | rates[15] = min(rates[0], rate_info->target_power_6to24); |
| 3566 | |
| 3567 | /* CCK rates have different peak to average ratio |
| 3568 | * so we have to tweak their power so that gainf |
| 3569 | * correction works ok. For this we use OFDM to |
| 3570 | * CCK delta from eeprom */ |
| 3571 | if ((ee_mode == AR5K_EEPROM_MODE_11G) && |
| 3572 | (ah->ah_phy_revision < AR5K_SREV_PHY_5212A)) |
| 3573 | for (i = 8; i <= 15; i++) |
| 3574 | rates[i] -= ah->ah_txpower.txp_cck_ofdm_gainf_delta; |
| 3575 | |
Nick Kossifidis | a082381 | 2009-04-30 15:55:44 -0400 | [diff] [blame] | 3576 | /* Now that we have all rates setup use table offset to |
| 3577 | * match the power range set by user with the power indices |
| 3578 | * on PCDAC/PDADC table */ |
| 3579 | for (i = 0; i < 16; i++) { |
| 3580 | rates[i] += ah->ah_txpower.txp_offset; |
| 3581 | /* Don't get out of bounds */ |
| 3582 | if (rates[i] > 63) |
| 3583 | rates[i] = 63; |
| 3584 | } |
| 3585 | |
| 3586 | /* Min/max in 0.25dB units */ |
| 3587 | ah->ah_txpower.txp_min_pwr = 2 * rates[7]; |
Bruno Randolf | 51f0062 | 2010-12-21 17:30:32 +0900 | [diff] [blame] | 3588 | ah->ah_txpower.txp_cur_pwr = 2 * rates[0]; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3589 | ah->ah_txpower.txp_ofdm = rates[7]; |
| 3590 | } |
| 3591 | |
| 3592 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 3593 | /** |
| 3594 | * ath5k_hw_txpower() - Set transmission power limit for a given channel |
| 3595 | * @ah: The &struct ath5k_hw |
| 3596 | * @channel: The &struct ieee80211_channel |
| 3597 | * @txpower: Requested tx power in 0.5dB steps |
| 3598 | * |
| 3599 | * Combines all of the above to set the requested tx power limit |
| 3600 | * on hw. |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3601 | */ |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3602 | static int |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3603 | ath5k_hw_txpower(struct ath5k_hw *ah, struct ieee80211_channel *channel, |
Bruno Randolf | 0207c0c | 2010-12-21 17:30:43 +0900 | [diff] [blame] | 3604 | u8 txpower) |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3605 | { |
| 3606 | struct ath5k_rate_pcal_info rate_info; |
Bruno Randolf | 26c7fc4 | 2010-12-21 17:30:20 +0900 | [diff] [blame] | 3607 | struct ieee80211_channel *curr_channel = ah->ah_current_channel; |
Dan Carpenter | a8851d1 | 2011-01-03 08:46:29 +0300 | [diff] [blame] | 3608 | int ee_mode; |
| 3609 | u8 type; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3610 | int ret; |
| 3611 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3612 | if (txpower > AR5K_TUNE_MAX_TXPOWER) { |
Pavel Roskin | e0d687b | 2011-07-14 20:21:55 -0400 | [diff] [blame] | 3613 | ATH5K_ERR(ah, "invalid tx power: %u\n", txpower); |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3614 | return -EINVAL; |
| 3615 | } |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3616 | |
Bruno Randolf | 0207c0c | 2010-12-21 17:30:43 +0900 | [diff] [blame] | 3617 | ee_mode = ath5k_eeprom_mode_from_channel(channel); |
| 3618 | if (ee_mode < 0) { |
Pavel Roskin | e0d687b | 2011-07-14 20:21:55 -0400 | [diff] [blame] | 3619 | ATH5K_ERR(ah, |
Bruno Randolf | 0207c0c | 2010-12-21 17:30:43 +0900 | [diff] [blame] | 3620 | "invalid channel: %d\n", channel->center_freq); |
| 3621 | return -EINVAL; |
| 3622 | } |
| 3623 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3624 | /* Initialize TX power table */ |
| 3625 | switch (ah->ah_radio) { |
Nick Kossifidis | 3bb1765 | 2010-11-23 21:45:21 +0200 | [diff] [blame] | 3626 | case AR5K_RF5110: |
| 3627 | /* TODO */ |
| 3628 | return 0; |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3629 | case AR5K_RF5111: |
| 3630 | type = AR5K_PWRTABLE_PWR_TO_PCDAC; |
| 3631 | break; |
| 3632 | case AR5K_RF5112: |
| 3633 | type = AR5K_PWRTABLE_LINEAR_PCDAC; |
| 3634 | break; |
| 3635 | case AR5K_RF2413: |
| 3636 | case AR5K_RF5413: |
| 3637 | case AR5K_RF2316: |
| 3638 | case AR5K_RF2317: |
| 3639 | case AR5K_RF2425: |
| 3640 | type = AR5K_PWRTABLE_PWR_TO_PDADC; |
| 3641 | break; |
| 3642 | default: |
| 3643 | return -EINVAL; |
| 3644 | } |
| 3645 | |
Bruno Randolf | 26c7fc4 | 2010-12-21 17:30:20 +0900 | [diff] [blame] | 3646 | /* |
| 3647 | * If we don't change channel/mode skip tx powertable calculation |
| 3648 | * and use the cached one. |
| 3649 | */ |
| 3650 | if (!ah->ah_txpower.txp_setup || |
| 3651 | (channel->hw_value != curr_channel->hw_value) || |
| 3652 | (channel->center_freq != curr_channel->center_freq)) { |
Nick Kossifidis | d84938c | 2010-12-03 06:03:00 +0200 | [diff] [blame] | 3653 | /* Reset TX power values */ |
| 3654 | memset(&ah->ah_txpower, 0, sizeof(ah->ah_txpower)); |
| 3655 | ah->ah_txpower.txp_tpc = AR5K_TUNE_TPC_TXPOWER; |
Nick Kossifidis | d84938c | 2010-12-03 06:03:00 +0200 | [diff] [blame] | 3656 | |
| 3657 | /* Calculate the powertable */ |
Nick Kossifidis | 4c57581 | 2010-11-23 21:37:30 +0200 | [diff] [blame] | 3658 | ret = ath5k_setup_channel_powertable(ah, channel, |
| 3659 | ee_mode, type); |
Nick Kossifidis | d84938c | 2010-12-03 06:03:00 +0200 | [diff] [blame] | 3660 | if (ret) |
| 3661 | return ret; |
Bruno Randolf | 56bd29d | 2010-12-21 17:30:26 +0900 | [diff] [blame] | 3662 | } |
| 3663 | |
| 3664 | /* Write table on hw */ |
| 3665 | ath5k_write_channel_powertable(ah, ee_mode, type); |
Nick Kossifidis | d84938c | 2010-12-03 06:03:00 +0200 | [diff] [blame] | 3666 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3667 | /* Limit max power if we have a CTL available */ |
| 3668 | ath5k_get_max_ctl_power(ah, channel); |
| 3669 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3670 | /* FIXME: Antenna reduction stuff */ |
| 3671 | |
| 3672 | /* FIXME: Limit power on turbo modes */ |
| 3673 | |
| 3674 | /* FIXME: TPC scale reduction */ |
| 3675 | |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 3676 | /* Get surrounding channels for per-rate power table |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3677 | * calibration */ |
| 3678 | ath5k_get_rate_pcal_data(ah, channel, &rate_info); |
| 3679 | |
| 3680 | /* Setup rate power table */ |
| 3681 | ath5k_setup_rate_powertable(ah, txpower, &rate_info, ee_mode); |
| 3682 | |
| 3683 | /* Write rate power table on hw */ |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 3684 | ath5k_hw_reg_write(ah, AR5K_TXPOWER_OFDM(3, 24) | |
| 3685 | AR5K_TXPOWER_OFDM(2, 16) | AR5K_TXPOWER_OFDM(1, 8) | |
| 3686 | AR5K_TXPOWER_OFDM(0, 0), AR5K_PHY_TXPOWER_RATE1); |
| 3687 | |
| 3688 | ath5k_hw_reg_write(ah, AR5K_TXPOWER_OFDM(7, 24) | |
| 3689 | AR5K_TXPOWER_OFDM(6, 16) | AR5K_TXPOWER_OFDM(5, 8) | |
| 3690 | AR5K_TXPOWER_OFDM(4, 0), AR5K_PHY_TXPOWER_RATE2); |
| 3691 | |
| 3692 | ath5k_hw_reg_write(ah, AR5K_TXPOWER_CCK(10, 24) | |
| 3693 | AR5K_TXPOWER_CCK(9, 16) | AR5K_TXPOWER_CCK(15, 8) | |
| 3694 | AR5K_TXPOWER_CCK(8, 0), AR5K_PHY_TXPOWER_RATE3); |
| 3695 | |
| 3696 | ath5k_hw_reg_write(ah, AR5K_TXPOWER_CCK(14, 24) | |
| 3697 | AR5K_TXPOWER_CCK(13, 16) | AR5K_TXPOWER_CCK(12, 8) | |
| 3698 | AR5K_TXPOWER_CCK(11, 0), AR5K_PHY_TXPOWER_RATE4); |
| 3699 | |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3700 | /* FIXME: TPC support */ |
| 3701 | if (ah->ah_txpower.txp_tpc) { |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 3702 | ath5k_hw_reg_write(ah, AR5K_PHY_TXPOWER_RATE_MAX_TPC_ENABLE | |
| 3703 | AR5K_TUNE_MAX_TXPOWER, AR5K_PHY_TXPOWER_RATE_MAX); |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3704 | |
| 3705 | ath5k_hw_reg_write(ah, |
| 3706 | AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_ACK) | |
| 3707 | AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_CTS) | |
| 3708 | AR5K_REG_MS(AR5K_TUNE_MAX_TXPOWER, AR5K_TPC_CHIRP), |
| 3709 | AR5K_TPC); |
| 3710 | } else { |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 3711 | ath5k_hw_reg_write(ah, AR5K_PHY_TXPOWER_RATE_MAX | |
| 3712 | AR5K_TUNE_MAX_TXPOWER, AR5K_PHY_TXPOWER_RATE_MAX); |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3713 | } |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 3714 | |
| 3715 | return 0; |
| 3716 | } |
| 3717 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 3718 | /** |
| 3719 | * ath5k_hw_set_txpower_limit() - Set txpower limit for the current channel |
| 3720 | * @ah: The &struct ath5k_hw |
| 3721 | * @txpower: The requested tx power limit in 0.5dB steps |
| 3722 | * |
| 3723 | * This function provides access to ath5k_hw_txpower to the driver in |
| 3724 | * case user or an application changes it while PHY is running. |
| 3725 | */ |
| 3726 | int |
| 3727 | ath5k_hw_set_txpower_limit(struct ath5k_hw *ah, u8 txpower) |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 3728 | { |
Pavel Roskin | e0d687b | 2011-07-14 20:21:55 -0400 | [diff] [blame] | 3729 | ATH5K_DBG(ah, ATH5K_DEBUG_TXPOWER, |
Nick Kossifidis | 8f655dd | 2009-03-15 22:20:35 +0200 | [diff] [blame] | 3730 | "changing txpower to %d\n", txpower); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 3731 | |
Bruno Randolf | 0207c0c | 2010-12-21 17:30:43 +0900 | [diff] [blame] | 3732 | return ath5k_hw_txpower(ah, ah->ah_current_channel, txpower); |
Jiri Slaby | fa1c114 | 2007-08-12 17:33:16 +0200 | [diff] [blame] | 3733 | } |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3734 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 3735 | |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3736 | /*************\ |
| 3737 | Init function |
| 3738 | \*************/ |
| 3739 | |
Nick Kossifidis | c47faa3 | 2011-11-25 20:40:25 +0200 | [diff] [blame^] | 3740 | /** |
| 3741 | * ath5k_hw_phy_init() - Initialize PHY |
| 3742 | * @ah: The &struct ath5k_hw |
| 3743 | * @channel: The @struct ieee80211_channel |
| 3744 | * @mode: One of enum ath5k_driver_mode |
| 3745 | * @fast: Try a fast channel switch instead |
| 3746 | * |
| 3747 | * This is the main function used during reset to initialize PHY |
| 3748 | * or do a fast channel change if possible. |
| 3749 | * |
| 3750 | * NOTE: Do not call this one from the driver, it assumes PHY is in a |
| 3751 | * warm reset state ! |
| 3752 | */ |
| 3753 | int |
| 3754 | ath5k_hw_phy_init(struct ath5k_hw *ah, struct ieee80211_channel *channel, |
Bruno Randolf | 0207c0c | 2010-12-21 17:30:43 +0900 | [diff] [blame] | 3755 | u8 mode, bool fast) |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3756 | { |
Nick Kossifidis | 4c57581 | 2010-11-23 21:37:30 +0200 | [diff] [blame] | 3757 | struct ieee80211_channel *curr_channel; |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3758 | int ret, i; |
| 3759 | u32 phy_tst1; |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3760 | ret = 0; |
| 3761 | |
| 3762 | /* |
Nick Kossifidis | 8aec7af | 2010-11-23 21:39:28 +0200 | [diff] [blame] | 3763 | * Sanity check for fast flag |
| 3764 | * Don't try fast channel change when changing modulation |
| 3765 | * mode/band. We check for chip compatibility on |
| 3766 | * ath5k_hw_reset. |
| 3767 | */ |
| 3768 | curr_channel = ah->ah_current_channel; |
| 3769 | if (fast && (channel->hw_value != curr_channel->hw_value)) |
| 3770 | return -EINVAL; |
| 3771 | |
| 3772 | /* |
| 3773 | * On fast channel change we only set the synth parameters |
| 3774 | * while PHY is running, enable calibration and skip the rest. |
| 3775 | */ |
| 3776 | if (fast) { |
| 3777 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_RFBUS_REQ, |
| 3778 | AR5K_PHY_RFBUS_REQ_REQUEST); |
| 3779 | for (i = 0; i < 100; i++) { |
| 3780 | if (ath5k_hw_reg_read(ah, AR5K_PHY_RFBUS_GRANT)) |
| 3781 | break; |
| 3782 | udelay(5); |
| 3783 | } |
| 3784 | /* Failed */ |
| 3785 | if (i >= 100) |
| 3786 | return -EIO; |
Nick Kossifidis | 573cfde | 2011-02-04 01:41:02 +0200 | [diff] [blame] | 3787 | |
| 3788 | /* Set channel and wait for synth */ |
| 3789 | ret = ath5k_hw_channel(ah, channel); |
| 3790 | if (ret) |
| 3791 | return ret; |
| 3792 | |
| 3793 | ath5k_hw_wait_for_synth(ah, channel); |
Nick Kossifidis | 8aec7af | 2010-11-23 21:39:28 +0200 | [diff] [blame] | 3794 | } |
| 3795 | |
| 3796 | /* |
Nick Kossifidis | 4c57581 | 2010-11-23 21:37:30 +0200 | [diff] [blame] | 3797 | * Set TX power |
| 3798 | * |
| 3799 | * Note: We need to do that before we set |
| 3800 | * RF buffer settings on 5211/5212+ so that we |
| 3801 | * properly set curve indices. |
| 3802 | */ |
Bruno Randolf | 0207c0c | 2010-12-21 17:30:43 +0900 | [diff] [blame] | 3803 | ret = ath5k_hw_txpower(ah, channel, ah->ah_txpower.txp_cur_pwr ? |
Bruno Randolf | 51f0062 | 2010-12-21 17:30:32 +0900 | [diff] [blame] | 3804 | ah->ah_txpower.txp_cur_pwr / 2 : AR5K_TUNE_MAX_TXPOWER); |
Nick Kossifidis | 4c57581 | 2010-11-23 21:37:30 +0200 | [diff] [blame] | 3805 | if (ret) |
| 3806 | return ret; |
| 3807 | |
Nick Kossifidis | 573cfde | 2011-02-04 01:41:02 +0200 | [diff] [blame] | 3808 | /* Write OFDM timings on 5212*/ |
| 3809 | if (ah->ah_version == AR5K_AR5212 && |
Pavel Roskin | 32c2546 | 2011-07-23 09:29:09 -0400 | [diff] [blame] | 3810 | channel->hw_value != AR5K_MODE_11B) { |
Nick Kossifidis | 573cfde | 2011-02-04 01:41:02 +0200 | [diff] [blame] | 3811 | |
| 3812 | ret = ath5k_hw_write_ofdm_timings(ah, channel); |
| 3813 | if (ret) |
| 3814 | return ret; |
| 3815 | |
| 3816 | /* Spur info is available only from EEPROM versions |
| 3817 | * greater than 5.3, but the EEPROM routines will use |
| 3818 | * static values for older versions */ |
| 3819 | if (ah->ah_mac_srev >= AR5K_SREV_AR5424) |
| 3820 | ath5k_hw_set_spur_mitigation_filter(ah, |
| 3821 | channel); |
| 3822 | } |
| 3823 | |
| 3824 | /* If we used fast channel switching |
| 3825 | * we are done, release RF bus and |
| 3826 | * fire up NF calibration. |
| 3827 | * |
| 3828 | * Note: Only NF calibration due to |
| 3829 | * channel change, not AGC calibration |
| 3830 | * since AGC is still running ! |
| 3831 | */ |
| 3832 | if (fast) { |
| 3833 | /* |
| 3834 | * Release RF Bus grant |
| 3835 | */ |
| 3836 | AR5K_REG_DISABLE_BITS(ah, AR5K_PHY_RFBUS_REQ, |
| 3837 | AR5K_PHY_RFBUS_REQ_REQUEST); |
| 3838 | |
| 3839 | /* |
| 3840 | * Start NF calibration |
| 3841 | */ |
| 3842 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL, |
| 3843 | AR5K_PHY_AGCCTL_NF); |
| 3844 | |
| 3845 | return ret; |
| 3846 | } |
| 3847 | |
Nick Kossifidis | 4c57581 | 2010-11-23 21:37:30 +0200 | [diff] [blame] | 3848 | /* |
| 3849 | * For 5210 we do all initialization using |
| 3850 | * initvals, so we don't have to modify |
| 3851 | * any settings (5210 also only supports |
| 3852 | * a/aturbo modes) |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3853 | */ |
Nick Kossifidis | 573cfde | 2011-02-04 01:41:02 +0200 | [diff] [blame] | 3854 | if (ah->ah_version != AR5K_AR5210) { |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3855 | |
| 3856 | /* |
| 3857 | * Write initial RF gain settings |
| 3858 | * This should work for both 5111/5112 |
| 3859 | */ |
Bruno Randolf | 26a51ad | 2010-12-21 17:30:37 +0900 | [diff] [blame] | 3860 | ret = ath5k_hw_rfgain_init(ah, channel->band); |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3861 | if (ret) |
| 3862 | return ret; |
| 3863 | |
Nick Kossifidis | 1846ac3 | 2011-11-25 20:40:24 +0200 | [diff] [blame] | 3864 | usleep_range(1000, 1500); |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3865 | |
| 3866 | /* |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3867 | * Write RF buffer |
| 3868 | */ |
| 3869 | ret = ath5k_hw_rfregs_init(ah, channel, mode); |
| 3870 | if (ret) |
| 3871 | return ret; |
| 3872 | |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3873 | /*Enable/disable 802.11b mode on 5111 |
| 3874 | (enable 2111 frequency converter + CCK)*/ |
| 3875 | if (ah->ah_radio == AR5K_RF5111) { |
| 3876 | if (mode == AR5K_MODE_11B) |
| 3877 | AR5K_REG_ENABLE_BITS(ah, AR5K_TXCFG, |
| 3878 | AR5K_TXCFG_B_MODE); |
| 3879 | else |
| 3880 | AR5K_REG_DISABLE_BITS(ah, AR5K_TXCFG, |
| 3881 | AR5K_TXCFG_B_MODE); |
| 3882 | } |
| 3883 | |
Nick Kossifidis | 8aec7af | 2010-11-23 21:39:28 +0200 | [diff] [blame] | 3884 | } else if (ah->ah_version == AR5K_AR5210) { |
Nick Kossifidis | 1846ac3 | 2011-11-25 20:40:24 +0200 | [diff] [blame] | 3885 | usleep_range(1000, 1500); |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3886 | /* Disable phy and wait */ |
| 3887 | ath5k_hw_reg_write(ah, AR5K_PHY_ACT_DISABLE, AR5K_PHY_ACT); |
Nick Kossifidis | 1846ac3 | 2011-11-25 20:40:24 +0200 | [diff] [blame] | 3888 | usleep_range(1000, 1500); |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3889 | } |
| 3890 | |
| 3891 | /* Set channel on PHY */ |
| 3892 | ret = ath5k_hw_channel(ah, channel); |
| 3893 | if (ret) |
| 3894 | return ret; |
| 3895 | |
| 3896 | /* |
| 3897 | * Enable the PHY and wait until completion |
| 3898 | * This includes BaseBand and Synthesizer |
| 3899 | * activation. |
| 3900 | */ |
| 3901 | ath5k_hw_reg_write(ah, AR5K_PHY_ACT_ENABLE, AR5K_PHY_ACT); |
| 3902 | |
Nick Kossifidis | 573cfde | 2011-02-04 01:41:02 +0200 | [diff] [blame] | 3903 | ath5k_hw_wait_for_synth(ah, channel); |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3904 | |
Nick Kossifidis | 573cfde | 2011-02-04 01:41:02 +0200 | [diff] [blame] | 3905 | /* |
| 3906 | * Perform ADC test to see if baseband is ready |
| 3907 | * Set tx hold and check adc test register |
| 3908 | */ |
| 3909 | phy_tst1 = ath5k_hw_reg_read(ah, AR5K_PHY_TST1); |
| 3910 | ath5k_hw_reg_write(ah, AR5K_PHY_TST1_TXHOLD, AR5K_PHY_TST1); |
| 3911 | for (i = 0; i <= 20; i++) { |
| 3912 | if (!(ath5k_hw_reg_read(ah, AR5K_PHY_ADC_TEST) & 0x10)) |
| 3913 | break; |
Nick Kossifidis | 1846ac3 | 2011-11-25 20:40:24 +0200 | [diff] [blame] | 3914 | usleep_range(200, 250); |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3915 | } |
Nick Kossifidis | 573cfde | 2011-02-04 01:41:02 +0200 | [diff] [blame] | 3916 | ath5k_hw_reg_write(ah, phy_tst1, AR5K_PHY_TST1); |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3917 | |
| 3918 | /* |
| 3919 | * Start automatic gain control calibration |
| 3920 | * |
| 3921 | * During AGC calibration RX path is re-routed to |
| 3922 | * a power detector so we don't receive anything. |
| 3923 | * |
| 3924 | * This method is used to calibrate some static offsets |
| 3925 | * used together with on-the fly I/Q calibration (the |
| 3926 | * one performed via ath5k_hw_phy_calibrate), which doesn't |
| 3927 | * interrupt rx path. |
| 3928 | * |
| 3929 | * While rx path is re-routed to the power detector we also |
| 3930 | * start a noise floor calibration to measure the |
| 3931 | * card's noise floor (the noise we measure when we are not |
| 3932 | * transmitting or receiving anything). |
| 3933 | * |
| 3934 | * If we are in a noisy environment, AGC calibration may time |
| 3935 | * out and/or noise floor calibration might timeout. |
| 3936 | */ |
| 3937 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL, |
| 3938 | AR5K_PHY_AGCCTL_CAL | AR5K_PHY_AGCCTL_NF); |
| 3939 | |
| 3940 | /* At the same time start I/Q calibration for QAM constellation |
| 3941 | * -no need for CCK- */ |
Nick Kossifidis | ce169ac | 2011-11-25 20:40:23 +0200 | [diff] [blame] | 3942 | ah->ah_iq_cal_needed = false; |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3943 | if (!(mode == AR5K_MODE_11B)) { |
Nick Kossifidis | ce169ac | 2011-11-25 20:40:23 +0200 | [diff] [blame] | 3944 | ah->ah_iq_cal_needed = true; |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3945 | AR5K_REG_WRITE_BITS(ah, AR5K_PHY_IQ, |
| 3946 | AR5K_PHY_IQ_CAL_NUM_LOG_MAX, 15); |
| 3947 | AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, |
| 3948 | AR5K_PHY_IQ_RUN); |
| 3949 | } |
| 3950 | |
| 3951 | /* Wait for gain calibration to finish (we check for I/Q calibration |
| 3952 | * during ath5k_phy_calibrate) */ |
| 3953 | if (ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL, |
| 3954 | AR5K_PHY_AGCCTL_CAL, 0, false)) { |
Pavel Roskin | e0d687b | 2011-07-14 20:21:55 -0400 | [diff] [blame] | 3955 | ATH5K_ERR(ah, "gain calibration timeout (%uMHz)\n", |
Nick Kossifidis | 9320b5c4 | 2010-11-23 20:36:45 +0200 | [diff] [blame] | 3956 | channel->center_freq); |
| 3957 | } |
| 3958 | |
| 3959 | /* Restore antenna mode */ |
| 3960 | ath5k_hw_set_antenna_mode(ah, ah->ah_ant_mode); |
| 3961 | |
| 3962 | return ret; |
| 3963 | } |