diff options
Diffstat (limited to 'drivers/net/wireless/mediatek/mt76/mt7603/eeprom.c')
| -rw-r--r-- | drivers/net/wireless/mediatek/mt76/mt7603/eeprom.c | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/mt7603/eeprom.c b/drivers/net/wireless/mediatek/mt76/mt7603/eeprom.c new file mode 100644 index 000000000..a6df733ac --- /dev/null +++ b/drivers/net/wireless/mediatek/mt76/mt7603/eeprom.c @@ -0,0 +1,186 @@ +// SPDX-License-Identifier: ISC + +#include <linux/of.h> +#include "mt7603.h" +#include "eeprom.h" + +static int +mt7603_efuse_read(struct mt7603_dev *dev, u32 base, u16 addr, u8 *data) +{ + u32 val; + int i; + + val = mt76_rr(dev, base + MT_EFUSE_CTRL); + val &= ~(MT_EFUSE_CTRL_AIN | + MT_EFUSE_CTRL_MODE); + val |= FIELD_PREP(MT_EFUSE_CTRL_AIN, addr & ~0xf); + val |= MT_EFUSE_CTRL_KICK; + mt76_wr(dev, base + MT_EFUSE_CTRL, val); + + if (!mt76_poll(dev, base + MT_EFUSE_CTRL, MT_EFUSE_CTRL_KICK, 0, 1000)) + return -ETIMEDOUT; + + udelay(2); + + val = mt76_rr(dev, base + MT_EFUSE_CTRL); + if ((val & MT_EFUSE_CTRL_AOUT) == MT_EFUSE_CTRL_AOUT || + WARN_ON_ONCE(!(val & MT_EFUSE_CTRL_VALID))) { + memset(data, 0xff, 16); + return 0; + } + + for (i = 0; i < 4; i++) { + val = mt76_rr(dev, base + MT_EFUSE_RDATA(i)); + put_unaligned_le32(val, data + 4 * i); + } + + return 0; +} + +static int +mt7603_efuse_init(struct mt7603_dev *dev) +{ + u32 base = mt7603_reg_map(dev, MT_EFUSE_BASE); + int len = MT7603_EEPROM_SIZE; + void *buf; + int ret, i; + + if (mt76_rr(dev, base + MT_EFUSE_BASE_CTRL) & MT_EFUSE_BASE_CTRL_EMPTY) + return 0; + + dev->mt76.otp.data = devm_kzalloc(dev->mt76.dev, len, GFP_KERNEL); + dev->mt76.otp.size = len; + if (!dev->mt76.otp.data) + return -ENOMEM; + + buf = dev->mt76.otp.data; + for (i = 0; i + 16 <= len; i += 16) { + ret = mt7603_efuse_read(dev, base, i, buf + i); + if (ret) + return ret; + } + + return 0; +} + +static bool +mt7603_has_cal_free_data(struct mt7603_dev *dev, u8 *efuse) +{ + if (!efuse[MT_EE_TEMP_SENSOR_CAL]) + return false; + + if (get_unaligned_le16(efuse + MT_EE_TX_POWER_0_START_2G) == 0) + return false; + + if (get_unaligned_le16(efuse + MT_EE_TX_POWER_1_START_2G) == 0) + return false; + + if (!efuse[MT_EE_CP_FT_VERSION]) + return false; + + if (!efuse[MT_EE_XTAL_FREQ_OFFSET]) + return false; + + if (!efuse[MT_EE_XTAL_WF_RFCAL]) + return false; + + return true; +} + +static void +mt7603_apply_cal_free_data(struct mt7603_dev *dev, u8 *efuse) +{ + static const u8 cal_free_bytes[] = { + MT_EE_TEMP_SENSOR_CAL, + MT_EE_CP_FT_VERSION, + MT_EE_XTAL_FREQ_OFFSET, + MT_EE_XTAL_WF_RFCAL, + /* Skip for MT7628 */ + MT_EE_TX_POWER_0_START_2G, + MT_EE_TX_POWER_0_START_2G + 1, + MT_EE_TX_POWER_1_START_2G, + MT_EE_TX_POWER_1_START_2G + 1, + }; + struct device_node *np = dev->mt76.dev->of_node; + u8 *eeprom = dev->mt76.eeprom.data; + int n = ARRAY_SIZE(cal_free_bytes); + int i; + + if (!np || !of_property_read_bool(np, "mediatek,eeprom-merge-otp")) + return; + + if (!mt7603_has_cal_free_data(dev, efuse)) + return; + + if (is_mt7628(dev)) + n -= 4; + + for (i = 0; i < n; i++) { + int offset = cal_free_bytes[i]; + + eeprom[offset] = efuse[offset]; + } +} + +static int +mt7603_eeprom_load(struct mt7603_dev *dev) +{ + int ret; + + ret = mt76_eeprom_init(&dev->mt76, MT7603_EEPROM_SIZE); + if (ret < 0) + return ret; + + return mt7603_efuse_init(dev); +} + +static int mt7603_check_eeprom(struct mt76_dev *dev) +{ + u16 val = get_unaligned_le16(dev->eeprom.data); + + switch (val) { + case 0x7628: + case 0x7603: + return 0; + default: + return -EINVAL; + } +} + +static inline bool is_mt7688(struct mt7603_dev *dev) +{ + return mt76_rr(dev, MT_EFUSE_BASE + 0x64) & BIT(4); +} + +int mt7603_eeprom_init(struct mt7603_dev *dev) +{ + u8 *eeprom; + int ret; + + ret = mt7603_eeprom_load(dev); + if (ret < 0) + return ret; + + if (dev->mt76.otp.data) { + if (mt7603_check_eeprom(&dev->mt76) == 0) + mt7603_apply_cal_free_data(dev, dev->mt76.otp.data); + else + memcpy(dev->mt76.eeprom.data, dev->mt76.otp.data, + MT7603_EEPROM_SIZE); + } + + eeprom = (u8 *)dev->mt76.eeprom.data; + dev->mphy.cap.has_2ghz = true; + memcpy(dev->mt76.macaddr, eeprom + MT_EE_MAC_ADDR, ETH_ALEN); + + /* Check for 1SS devices */ + dev->mphy.antenna_mask = 3; + if (FIELD_GET(MT_EE_NIC_CONF_0_RX_PATH, eeprom[MT_EE_NIC_CONF_0]) == 1 || + FIELD_GET(MT_EE_NIC_CONF_0_TX_PATH, eeprom[MT_EE_NIC_CONF_0]) == 1 || + is_mt7688(dev)) + dev->mphy.antenna_mask = 1; + + mt76_eeprom_override(&dev->mt76); + + return 0; +} |