diff options
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c b/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c new file mode 100644 index 000000000000..9390de2a323e --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt76x02_eeprom.c @@ -0,0 +1,153 @@ +/* + * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name> + * Copyright (C) 2018 Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <asm/unaligned.h> + +#include "mt76x02_eeprom.h" + +static int +mt76x02_efuse_read(struct mt76x02_dev *dev, u16 addr, u8 *data, + enum mt76x02_eeprom_modes mode) +{ + u32 val; + int i; + + val = mt76_rr(dev, MT_EFUSE_CTRL); + val &= ~(MT_EFUSE_CTRL_AIN | + MT_EFUSE_CTRL_MODE); + val |= FIELD_PREP(MT_EFUSE_CTRL_AIN, addr & ~0xf); + val |= FIELD_PREP(MT_EFUSE_CTRL_MODE, mode); + val |= MT_EFUSE_CTRL_KICK; + mt76_wr(dev, MT_EFUSE_CTRL, val); + + if (!mt76_poll_msec(dev, MT_EFUSE_CTRL, MT_EFUSE_CTRL_KICK, 0, 1000)) + return -ETIMEDOUT; + + udelay(2); + + val = mt76_rr(dev, MT_EFUSE_CTRL); + if ((val & MT_EFUSE_CTRL_AOUT) == MT_EFUSE_CTRL_AOUT) { + memset(data, 0xff, 16); + return 0; + } + + for (i = 0; i < 4; i++) { + val = mt76_rr(dev, MT_EFUSE_DATA(i)); + put_unaligned_le32(val, data + 4 * i); + } + + return 0; +} + +int mt76x02_get_efuse_data(struct mt76x02_dev *dev, u16 base, void *buf, + int len, enum mt76x02_eeprom_modes mode) +{ + int ret, i; + + for (i = 0; i + 16 <= len; i += 16) { + ret = mt76x02_efuse_read(dev, base + i, buf + i, mode); + if (ret) + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(mt76x02_get_efuse_data); + +void mt76x02_eeprom_parse_hw_cap(struct mt76x02_dev *dev) +{ + u16 val = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_0); + + switch (FIELD_GET(MT_EE_NIC_CONF_0_BOARD_TYPE, val)) { + case BOARD_TYPE_5GHZ: + dev->mt76.cap.has_5ghz = true; + break; + case BOARD_TYPE_2GHZ: + dev->mt76.cap.has_2ghz = true; + break; + default: + dev->mt76.cap.has_2ghz = true; + dev->mt76.cap.has_5ghz = true; + break; + } +} +EXPORT_SYMBOL_GPL(mt76x02_eeprom_parse_hw_cap); + +bool mt76x02_ext_pa_enabled(struct mt76x02_dev *dev, enum nl80211_band band) +{ + u16 conf0 = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_0); + + if (band == NL80211_BAND_5GHZ) + return !(conf0 & MT_EE_NIC_CONF_0_PA_INT_5G); + else + return !(conf0 & MT_EE_NIC_CONF_0_PA_INT_2G); +} +EXPORT_SYMBOL_GPL(mt76x02_ext_pa_enabled); + +void mt76x02_get_rx_gain(struct mt76x02_dev *dev, enum nl80211_band band, + u16 *rssi_offset, s8 *lna_2g, s8 *lna_5g) +{ + u16 val; + + val = mt76x02_eeprom_get(dev, MT_EE_LNA_GAIN); + *lna_2g = val & 0xff; + lna_5g[0] = val >> 8; + + val = mt76x02_eeprom_get(dev, MT_EE_RSSI_OFFSET_2G_1); + lna_5g[1] = val >> 8; + + val = mt76x02_eeprom_get(dev, MT_EE_RSSI_OFFSET_5G_1); + lna_5g[2] = val >> 8; + + if (!mt76x02_field_valid(lna_5g[1])) + lna_5g[1] = lna_5g[0]; + + if (!mt76x02_field_valid(lna_5g[2])) + lna_5g[2] = lna_5g[0]; + + if (band == NL80211_BAND_2GHZ) + *rssi_offset = mt76x02_eeprom_get(dev, MT_EE_RSSI_OFFSET_2G_0); + else + *rssi_offset = mt76x02_eeprom_get(dev, MT_EE_RSSI_OFFSET_5G_0); +} +EXPORT_SYMBOL_GPL(mt76x02_get_rx_gain); + +u8 mt76x02_get_lna_gain(struct mt76x02_dev *dev, + s8 *lna_2g, s8 *lna_5g, + struct ieee80211_channel *chan) +{ + u16 val; + u8 lna; + + val = mt76x02_eeprom_get(dev, MT_EE_NIC_CONF_1); + if (val & MT_EE_NIC_CONF_1_LNA_EXT_2G) + *lna_2g = 0; + if (val & MT_EE_NIC_CONF_1_LNA_EXT_5G) + memset(lna_5g, 0, sizeof(s8) * 3); + + if (chan->band == NL80211_BAND_2GHZ) + lna = *lna_2g; + else if (chan->hw_value <= 64) + lna = lna_5g[0]; + else if (chan->hw_value <= 128) + lna = lna_5g[1]; + else + lna = lna_5g[2]; + + return lna != 0xff ? lna : 0; +} +EXPORT_SYMBOL_GPL(mt76x02_get_lna_gain); |