189 lines · c
1// SPDX-License-Identifier: ISC2 3#include <linux/of.h>4#include "mt7603.h"5#include "eeprom.h"6 7static int8mt7603_efuse_read(struct mt7603_dev *dev, u32 base, u16 addr, u8 *data)9{10 u32 val;11 int i;12 13 val = mt76_rr(dev, base + MT_EFUSE_CTRL);14 val &= ~(MT_EFUSE_CTRL_AIN |15 MT_EFUSE_CTRL_MODE);16 val |= FIELD_PREP(MT_EFUSE_CTRL_AIN, addr & ~0xf);17 val |= MT_EFUSE_CTRL_KICK;18 mt76_wr(dev, base + MT_EFUSE_CTRL, val);19 20 if (!mt76_poll(dev, base + MT_EFUSE_CTRL, MT_EFUSE_CTRL_KICK, 0, 1000))21 return -ETIMEDOUT;22 23 udelay(2);24 25 val = mt76_rr(dev, base + MT_EFUSE_CTRL);26 if ((val & MT_EFUSE_CTRL_AOUT) == MT_EFUSE_CTRL_AOUT ||27 WARN_ON_ONCE(!(val & MT_EFUSE_CTRL_VALID))) {28 memset(data, 0xff, 16);29 return 0;30 }31 32 for (i = 0; i < 4; i++) {33 val = mt76_rr(dev, base + MT_EFUSE_RDATA(i));34 put_unaligned_le32(val, data + 4 * i);35 }36 37 return 0;38}39 40static int41mt7603_efuse_init(struct mt7603_dev *dev)42{43 u32 base = mt7603_reg_map(dev, MT_EFUSE_BASE);44 int len = MT7603_EEPROM_SIZE;45 void *buf;46 int ret, i;47 48 if (mt76_rr(dev, base + MT_EFUSE_BASE_CTRL) & MT_EFUSE_BASE_CTRL_EMPTY)49 return 0;50 51 dev->mt76.otp.data = devm_kzalloc(dev->mt76.dev, len, GFP_KERNEL);52 dev->mt76.otp.size = len;53 if (!dev->mt76.otp.data)54 return -ENOMEM;55 56 buf = dev->mt76.otp.data;57 for (i = 0; i + 16 <= len; i += 16) {58 ret = mt7603_efuse_read(dev, base, i, buf + i);59 if (ret)60 return ret;61 }62 63 return 0;64}65 66static bool67mt7603_has_cal_free_data(struct mt7603_dev *dev, u8 *efuse)68{69 if (!efuse[MT_EE_TEMP_SENSOR_CAL])70 return false;71 72 if (get_unaligned_le16(efuse + MT_EE_TX_POWER_0_START_2G) == 0)73 return false;74 75 if (get_unaligned_le16(efuse + MT_EE_TX_POWER_1_START_2G) == 0)76 return false;77 78 if (!efuse[MT_EE_CP_FT_VERSION])79 return false;80 81 if (!efuse[MT_EE_XTAL_FREQ_OFFSET])82 return false;83 84 if (!efuse[MT_EE_XTAL_WF_RFCAL])85 return false;86 87 return true;88}89 90static void91mt7603_apply_cal_free_data(struct mt7603_dev *dev, u8 *efuse)92{93 static const u8 cal_free_bytes[] = {94 MT_EE_TEMP_SENSOR_CAL,95 MT_EE_CP_FT_VERSION,96 MT_EE_XTAL_FREQ_OFFSET,97 MT_EE_XTAL_WF_RFCAL,98 /* Skip for MT7628 */99 MT_EE_TX_POWER_0_START_2G,100 MT_EE_TX_POWER_0_START_2G + 1,101 MT_EE_TX_POWER_1_START_2G,102 MT_EE_TX_POWER_1_START_2G + 1,103 };104 struct device_node *np = dev->mt76.dev->of_node;105 u8 *eeprom = dev->mt76.eeprom.data;106 int n = ARRAY_SIZE(cal_free_bytes);107 int i;108 109 if (!np || !of_property_read_bool(np, "mediatek,eeprom-merge-otp"))110 return;111 112 if (!mt7603_has_cal_free_data(dev, efuse))113 return;114 115 if (is_mt7628(dev))116 n -= 4;117 118 for (i = 0; i < n; i++) {119 int offset = cal_free_bytes[i];120 121 eeprom[offset] = efuse[offset];122 }123}124 125static int126mt7603_eeprom_load(struct mt7603_dev *dev)127{128 int ret;129 130 ret = mt76_eeprom_init(&dev->mt76, MT7603_EEPROM_SIZE);131 if (ret < 0)132 return ret;133 134 return mt7603_efuse_init(dev);135}136 137static int mt7603_check_eeprom(struct mt76_dev *dev)138{139 u16 val = get_unaligned_le16(dev->eeprom.data);140 141 switch (val) {142 case 0x7628:143 case 0x7603:144 case 0x7600:145 return 0;146 default:147 return -EINVAL;148 }149}150 151static inline bool is_mt7688(struct mt7603_dev *dev)152{153 return mt76_rr(dev, MT_EFUSE_BASE + 0x64) & BIT(4);154}155 156int mt7603_eeprom_init(struct mt7603_dev *dev)157{158 u8 *eeprom;159 int ret;160 161 ret = mt7603_eeprom_load(dev);162 if (ret < 0)163 return ret;164 165 if (dev->mt76.otp.data) {166 if (mt7603_check_eeprom(&dev->mt76) == 0)167 mt7603_apply_cal_free_data(dev, dev->mt76.otp.data);168 else169 memcpy(dev->mt76.eeprom.data, dev->mt76.otp.data,170 MT7603_EEPROM_SIZE);171 }172 173 eeprom = (u8 *)dev->mt76.eeprom.data;174 dev->mphy.cap.has_2ghz = true;175 memcpy(dev->mphy.macaddr, eeprom + MT_EE_MAC_ADDR, ETH_ALEN);176 177 /* Check for 1SS devices */178 dev->mphy.antenna_mask = 3;179 if (FIELD_GET(MT_EE_NIC_CONF_0_RX_PATH, eeprom[MT_EE_NIC_CONF_0]) == 1 ||180 FIELD_GET(MT_EE_NIC_CONF_0_TX_PATH, eeprom[MT_EE_NIC_CONF_0]) == 1 ||181 is_mt7688(dev))182 dev->mphy.antenna_mask = 1;183 184 dev->mphy.chainmask = dev->mphy.antenna_mask;185 mt76_eeprom_override(&dev->mphy);186 187 return 0;188}189