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// 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:
case 0x7600:
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->mphy.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->mphy);
return 0;
}
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