developer | b11a539 | 2022-03-31 00:34:47 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: ISC |
| 2 | |
| 3 | #include <linux/of.h> |
| 4 | #include "mt7603.h" |
| 5 | #include "eeprom.h" |
| 6 | |
| 7 | static int |
| 8 | mt7603_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 | |
| 40 | static int |
| 41 | mt7603_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 | |
| 66 | static bool |
| 67 | mt7603_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 | |
| 90 | static void |
| 91 | mt7603_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 | |
| 125 | static int |
| 126 | mt7603_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 | |
| 137 | static 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 | |
| 151 | static inline bool is_mt7688(struct mt7603_dev *dev) |
| 152 | { |
| 153 | return mt76_rr(dev, MT_EFUSE_BASE + 0x64) & BIT(4); |
| 154 | } |
| 155 | |
| 156 | int 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 | else |
| 169 | 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 | mt76_eeprom_override(&dev->mphy); |
| 185 | |
| 186 | return 0; |
| 187 | } |