diff options
Diffstat (limited to 'drivers/net/wireless/ath')
| -rw-r--r-- | drivers/net/wireless/ath/ar9170/phy.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ar9170/phy.c b/drivers/net/wireless/ath/ar9170/phy.c index 3ace58ab40c..108ebfe21fc 100644 --- a/drivers/net/wireless/ath/ar9170/phy.c +++ b/drivers/net/wireless/ath/ar9170/phy.c @@ -1120,6 +1120,124 @@ static u8 ar9170_interpolate_u8(u8 x, u8 x1, u8 y1, u8 x2, u8 y2) #undef SHIFT } +static u8 ar9170_interpolate_val(u8 x, u8 *x_array, u8 *y_array) +{ + int i; + + for (i = 0; i < 3; i++) + if (x <= x_array[i + 1]) + break; + + return ar9170_interpolate_u8(x, + x_array[i], + y_array[i], + x_array[i + 1], + y_array[i + 1]); +} + +static int ar9170_set_freq_cal_data(struct ar9170 *ar, + struct ieee80211_channel *channel) +{ + u8 *cal_freq_pier; + u8 vpds[2][AR5416_PD_GAIN_ICEPTS]; + u8 pwrs[2][AR5416_PD_GAIN_ICEPTS]; + int chain, idx, i; + u8 f; + + switch (channel->band) { + case IEEE80211_BAND_2GHZ: + f = channel->center_freq - 2300; + cal_freq_pier = ar->eeprom.cal_freq_pier_2G; + i = AR5416_NUM_2G_CAL_PIERS - 1; + break; + + case IEEE80211_BAND_5GHZ: + f = (channel->center_freq - 4800) / 5; + cal_freq_pier = ar->eeprom.cal_freq_pier_5G; + i = AR5416_NUM_5G_CAL_PIERS - 1; + break; + + default: + return -EINVAL; + break; + } + + for (; i >= 0; i--) { + if (cal_freq_pier[i] != 0xff) + break; + } + if (i < 0) + return -EINVAL; + + idx = ar9170_find_freq_idx(i, cal_freq_pier, f); + + ar9170_regwrite_begin(ar); + + for (chain = 0; chain < AR5416_MAX_CHAINS; chain++) { + for (i = 0; i < AR5416_PD_GAIN_ICEPTS; i++) { + struct ar9170_calibration_data_per_freq *cal_pier_data; + int j; + + switch (channel->band) { + case IEEE80211_BAND_2GHZ: + cal_pier_data = &ar->eeprom. + cal_pier_data_2G[chain][idx]; + break; + + case IEEE80211_BAND_5GHZ: + cal_pier_data = &ar->eeprom. + cal_pier_data_5G[chain][idx]; + break; + + default: + return -EINVAL; + } + + for (j = 0; j < 2; j++) { + vpds[j][i] = ar9170_interpolate_u8(f, + cal_freq_pier[idx], + cal_pier_data->vpd_pdg[j][i], + cal_freq_pier[idx + 1], + cal_pier_data[1].vpd_pdg[j][i]); + + pwrs[j][i] = ar9170_interpolate_u8(f, + cal_freq_pier[idx], + cal_pier_data->pwr_pdg[j][i], + cal_freq_pier[idx + 1], + cal_pier_data[1].pwr_pdg[j][i]) / 2; + } + } + + for (i = 0; i < 76; i++) { + u32 phy_data; + u8 tmp; + + if (i < 25) { + tmp = ar9170_interpolate_val(i, &pwrs[0][0], + &vpds[0][0]); + } else { + tmp = ar9170_interpolate_val(i - 12, + &pwrs[1][0], + &vpds[1][0]); + } + + phy_data |= tmp << ((i & 3) << 3); + if ((i & 3) == 3) { + ar9170_regwrite(0x1c6280 + chain * 0x1000 + + (i & ~3), phy_data); + phy_data = 0; + } + } + + for (i = 19; i < 32; i++) + ar9170_regwrite(0x1c6280 + chain * 0x1000 + (i << 2), + 0x0); + } + + ar9170_regwrite_finish(); + return ar9170_regwrite_result(); +} + static int ar9170_set_power_cal(struct ar9170 *ar, u32 freq, enum ar9170_bw bw) { struct ar9170_calibration_target_power_legacy *ctpl; @@ -1340,6 +1458,10 @@ int ar9170_set_channel(struct ar9170 *ar, struct ieee80211_channel *channel, if (err) return err; + err = ar9170_set_freq_cal_data(ar, channel); + if (err) + return err; + err = ar9170_set_power_cal(ar, channel->center_freq, bw); if (err) return err; |