1 // SPDX-License-Identifier: ISC 2 3 #include "mt7603.h" 4 #include "eeprom.h" 5 6 static int 7 mt7603_efuse_read(struct mt7603_dev *dev, u32 base, u16 addr, u8 *data) 8 { 9 u32 val; 10 int i; 11 12 val = mt76_rr(dev, base + MT_EFUSE_CTRL); 13 val &= ~(MT_EFUSE_CTRL_AIN | 14 MT_EFUSE_CTRL_MODE); 15 val |= FIELD_PREP(MT_EFUSE_CTRL_AIN, addr & ~0xf); 16 val |= MT_EFUSE_CTRL_KICK; 17 mt76_wr(dev, base + MT_EFUSE_CTRL, val); 18 19 if (!mt76_poll(dev, base + MT_EFUSE_CTRL, MT_EFUSE_CTRL_KICK, 0, 1000)) 20 return -ETIMEDOUT; 21 22 udelay(2); 23 24 val = mt76_rr(dev, base + MT_EFUSE_CTRL); 25 if ((val & MT_EFUSE_CTRL_AOUT) == MT_EFUSE_CTRL_AOUT || 26 WARN_ON_ONCE(!(val & MT_EFUSE_CTRL_VALID))) { 27 memset(data, 0xff, 16); 28 return 0; 29 } 30 31 for (i = 0; i < 4; i++) { 32 val = mt76_rr(dev, base + MT_EFUSE_RDATA(i)); 33 put_unaligned_le32(val, data + 4 * i); 34 } 35 36 return 0; 37 } 38 39 static int 40 mt7603_efuse_init(struct mt7603_dev *dev) 41 { 42 u32 base = mt7603_reg_map(dev, MT_EFUSE_BASE); 43 int len = MT7603_EEPROM_SIZE; 44 void *buf; 45 int ret, i; 46 47 if (mt76_rr(dev, base + MT_EFUSE_BASE_CTRL) & MT_EFUSE_BASE_CTRL_EMPTY) 48 return 0; 49 50 dev->mt76.otp.data = devm_kzalloc(dev->mt76.dev, len, GFP_KERNEL); 51 dev->mt76.otp.size = len; 52 if (!dev->mt76.otp.data) 53 return -ENOMEM; 54 55 buf = dev->mt76.otp.data; 56 for (i = 0; i + 16 <= len; i += 16) { 57 ret = mt7603_efuse_read(dev, base, i, buf + i); 58 if (ret) 59 return ret; 60 } 61 62 return 0; 63 } 64 65 static bool 66 mt7603_has_cal_free_data(struct mt7603_dev *dev, u8 *efuse) 67 { 68 if (!efuse[MT_EE_TEMP_SENSOR_CAL]) 69 return false; 70 71 if (get_unaligned_le16(efuse + MT_EE_TX_POWER_0_START_2G) == 0) 72 return false; 73 74 if (get_unaligned_le16(efuse + MT_EE_TX_POWER_1_START_2G) == 0) 75 return false; 76 77 if (!efuse[MT_EE_CP_FT_VERSION]) 78 return false; 79 80 if (!efuse[MT_EE_XTAL_FREQ_OFFSET]) 81 return false; 82 83 if (!efuse[MT_EE_XTAL_WF_RFCAL]) 84 return false; 85 86 return true; 87 } 88 89 static void 90 mt7603_apply_cal_free_data(struct mt7603_dev *dev, u8 *efuse) 91 { 92 static const u8 cal_free_bytes[] = { 93 MT_EE_TEMP_SENSOR_CAL, 94 MT_EE_CP_FT_VERSION, 95 MT_EE_XTAL_FREQ_OFFSET, 96 MT_EE_XTAL_WF_RFCAL, 97 /* Skip for MT7628 */ 98 MT_EE_TX_POWER_0_START_2G, 99 MT_EE_TX_POWER_0_START_2G + 1, 100 MT_EE_TX_POWER_1_START_2G, 101 MT_EE_TX_POWER_1_START_2G + 1, 102 }; 103 u8 *eeprom = dev->mt76.eeprom.data; 104 int n = ARRAY_SIZE(cal_free_bytes); 105 int i; 106 107 if (!mt7603_has_cal_free_data(dev, efuse)) 108 return; 109 110 if (is_mt7628(dev)) 111 n -= 4; 112 113 for (i = 0; i < n; i++) { 114 int offset = cal_free_bytes[i]; 115 116 eeprom[offset] = efuse[offset]; 117 } 118 } 119 120 static int 121 mt7603_eeprom_load(struct mt7603_dev *dev) 122 { 123 int ret; 124 125 ret = mt76_eeprom_init(&dev->mt76, MT7603_EEPROM_SIZE); 126 if (ret < 0) 127 return ret; 128 129 return mt7603_efuse_init(dev); 130 } 131 132 static int mt7603_check_eeprom(struct mt76_dev *dev) 133 { 134 u16 val = get_unaligned_le16(dev->eeprom.data); 135 136 switch (val) { 137 case 0x7628: 138 case 0x7603: 139 return 0; 140 default: 141 return -EINVAL; 142 } 143 } 144 145 int mt7603_eeprom_init(struct mt7603_dev *dev) 146 { 147 int ret; 148 149 ret = mt7603_eeprom_load(dev); 150 if (ret < 0) 151 return ret; 152 153 if (dev->mt76.otp.data) { 154 if (mt7603_check_eeprom(&dev->mt76) == 0) 155 mt7603_apply_cal_free_data(dev, dev->mt76.otp.data); 156 else 157 memcpy(dev->mt76.eeprom.data, dev->mt76.otp.data, 158 MT7603_EEPROM_SIZE); 159 } 160 161 dev->mt76.cap.has_2ghz = true; 162 memcpy(dev->mt76.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR, 163 ETH_ALEN); 164 165 mt76_eeprom_override(&dev->mt76); 166 167 return 0; 168 } 169