leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
Files
f7fbcf4637fe8f54acb18d88488ae901b3d7a4dc
linux/drivers/net/wireless/mediatek/mt76/mt7615/eeprom.c
Sander Vanheule 858ebf446b mt76: mt7615: support loading EEPROM for MT7613BE 
EEPROM blobs for MT7613BE radios start with (little endian) 0x7663,
which is also the PCI device ID for this device. The EEPROM is required
for the radio to work at useful power levels, otherwise only the lowest
power level is available.

Suggested-by: Georgi Vlaev <georgi.vlaev@konsulko.com>
Tested-by: Stijn Segers <foss@volatilesystems.org>
Signed-off-by: Sander Vanheule <sander@svanheule.net>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
2021-04-11 18:50:38 +02:00

354 lines
7.5 KiB
C
Raw Blame History

// SPDX-License-Identifier: ISC
/* Copyright (C) 2019 MediaTek Inc.
*
* Author: Ryder Lee <ryder.lee@mediatek.com>
* Felix Fietkau <nbd@nbd.name>
*/
#include <linux/of.h>
#include "mt7615.h"
#include "eeprom.h"
static int mt7615_efuse_read(struct mt7615_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, 0x0, 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 mt7615_efuse_init(struct mt7615_dev *dev, u32 base)
{
int i, len = MT7615_EEPROM_SIZE;
void *buf;
u32 val;
val = mt76_rr(dev, base + MT_EFUSE_BASE_CTRL);
if (val & 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) {
int ret;
ret = mt7615_efuse_read(dev, base, i, buf + i);
if (ret)
return ret;
}
return 0;
}
static int mt7615_eeprom_load(struct mt7615_dev *dev, u32 addr)
{
int ret;
ret = mt76_eeprom_init(&dev->mt76, MT7615_EEPROM_FULL_SIZE);
if (ret < 0)
return ret;
return mt7615_efuse_init(dev, addr);
}
static int mt7615_check_eeprom(struct mt76_dev *dev)
{
u16 val = get_unaligned_le16(dev->eeprom.data);
switch (val) {
case 0x7615:
case 0x7622:
case 0x7663:
return 0;
default:
return -EINVAL;
}
}
static void
mt7615_eeprom_parse_hw_band_cap(struct mt7615_dev *dev)
{
u8 val, *eeprom = dev->mt76.eeprom.data;
if (is_mt7663(&dev->mt76)) {
/* dual band */
dev->mphy.cap.has_2ghz = true;
dev->mphy.cap.has_5ghz = true;
return;
}
if (is_mt7622(&dev->mt76)) {
/* 2GHz only */
dev->mphy.cap.has_2ghz = true;
return;
}
if (is_mt7611(&dev->mt76)) {
/* 5GHz only */
dev->mphy.cap.has_5ghz = true;
return;
}
val = FIELD_GET(MT_EE_NIC_WIFI_CONF_BAND_SEL,
eeprom[MT_EE_WIFI_CONF]);
switch (val) {
case MT_EE_5GHZ:
dev->mphy.cap.has_5ghz = true;
break;
case MT_EE_2GHZ:
dev->mphy.cap.has_2ghz = true;
break;
case MT_EE_DBDC:
dev->dbdc_support = true;
fallthrough;
default:
dev->mphy.cap.has_2ghz = true;
dev->mphy.cap.has_5ghz = true;
break;
}
}
static void mt7615_eeprom_parse_hw_cap(struct mt7615_dev *dev)
{
u8 *eeprom = dev->mt76.eeprom.data;
u8 tx_mask, max_nss;
mt7615_eeprom_parse_hw_band_cap(dev);
if (is_mt7663(&dev->mt76)) {
max_nss = 2;
tx_mask = FIELD_GET(MT_EE_HW_CONF1_TX_MASK,
eeprom[MT7663_EE_HW_CONF1]);
} else {
u32 val;
/* read tx-rx mask from eeprom */
val = mt76_rr(dev, MT_TOP_STRAP_STA);
max_nss = val & MT_TOP_3NSS ? 3 : 4;
tx_mask = FIELD_GET(MT_EE_NIC_CONF_TX_MASK,
eeprom[MT_EE_NIC_CONF_0]);
}
if (!tx_mask || tx_mask > max_nss)
tx_mask = max_nss;
dev->chainmask = BIT(tx_mask) - 1;
dev->mphy.antenna_mask = dev->chainmask;
dev->mphy.chainmask = dev->chainmask;
}
static int mt7663_eeprom_get_target_power_index(struct mt7615_dev *dev,
struct ieee80211_channel *chan,
u8 chain_idx)
{
int index, group;
if (chain_idx > 1)
return -EINVAL;
if (chan->band == NL80211_BAND_2GHZ)
return MT7663_EE_TX0_2G_TARGET_POWER + (chain_idx << 4);
group = mt7615_get_channel_group(chan->hw_value);
if (chain_idx == 1)
index = MT7663_EE_TX1_5G_G0_TARGET_POWER;
else
index = MT7663_EE_TX0_5G_G0_TARGET_POWER;
return index + group * 3;
}
int mt7615_eeprom_get_target_power_index(struct mt7615_dev *dev,
struct ieee80211_channel *chan,
u8 chain_idx)
{
int index;
if (is_mt7663(&dev->mt76))
return mt7663_eeprom_get_target_power_index(dev, chan,
chain_idx);
if (chain_idx > 3)
return -EINVAL;
/* TSSI disabled */
if (mt7615_ext_pa_enabled(dev, chan->band)) {
if (chan->band == NL80211_BAND_2GHZ)
return MT_EE_EXT_PA_2G_TARGET_POWER;
else
return MT_EE_EXT_PA_5G_TARGET_POWER;
}
/* TSSI enabled */
if (chan->band == NL80211_BAND_2GHZ) {
index = MT_EE_TX0_2G_TARGET_POWER + chain_idx * 6;
} else {
int group = mt7615_get_channel_group(chan->hw_value);
switch (chain_idx) {
case 1:
index = MT_EE_TX1_5G_G0_TARGET_POWER;
break;
case 2:
index = MT_EE_TX2_5G_G0_TARGET_POWER;
break;
case 3:
index = MT_EE_TX3_5G_G0_TARGET_POWER;
break;
case 0:
default:
index = MT_EE_TX0_5G_G0_TARGET_POWER;
break;
}
index += 5 * group;
}
return index;
}
int mt7615_eeprom_get_power_delta_index(struct mt7615_dev *dev,
enum nl80211_band band)
{
/* assume the first rate has the highest power offset */
if (is_mt7663(&dev->mt76)) {
if (band == NL80211_BAND_2GHZ)
return MT_EE_TX0_5G_G0_TARGET_POWER;
else
return MT7663_EE_5G_RATE_POWER;
}
if (band == NL80211_BAND_2GHZ)
return MT_EE_2G_RATE_POWER;
else
return MT_EE_5G_RATE_POWER;
}
static void mt7615_apply_cal_free_data(struct mt7615_dev *dev)
{
static const u16 ical[] = {
0x53, 0x54, 0x55, 0x56, 0x57, 0x5c, 0x5d, 0x62, 0x63, 0x68,
0x69, 0x6e, 0x6f, 0x73, 0x74, 0x78, 0x79, 0x82, 0x83, 0x87,
0x88, 0x8c, 0x8d, 0x91, 0x92, 0x96, 0x97, 0x9b, 0x9c, 0xa0,
0xa1, 0xaa, 0xab, 0xaf, 0xb0, 0xb4, 0xb5, 0xb9, 0xba, 0xf4,
0xf7, 0xff,
0x140, 0x141, 0x145, 0x146, 0x14a, 0x14b, 0x154, 0x155, 0x159,
0x15a, 0x15e, 0x15f, 0x163, 0x164, 0x168, 0x169, 0x16d, 0x16e,
0x172, 0x173, 0x17c, 0x17d, 0x181, 0x182, 0x186, 0x187, 0x18b,
0x18c
};
static const u16 ical_nocheck[] = {
0x110, 0x111, 0x112, 0x113, 0x114, 0x115, 0x116, 0x117, 0x118,
0x1b5, 0x1b6, 0x1b7, 0x3ac, 0x3ad, 0x3ae, 0x3af, 0x3b0, 0x3b1,
0x3b2
};
u8 *eeprom = dev->mt76.eeprom.data;
u8 *otp = dev->mt76.otp.data;
int i;
if (!otp)
return;
for (i = 0; i < ARRAY_SIZE(ical); i++)
if (!otp[ical[i]])
return;
for (i = 0; i < ARRAY_SIZE(ical); i++)
eeprom[ical[i]] = otp[ical[i]];
for (i = 0; i < ARRAY_SIZE(ical_nocheck); i++)
eeprom[ical_nocheck[i]] = otp[ical_nocheck[i]];
}
static void mt7622_apply_cal_free_data(struct mt7615_dev *dev)
{
static const u16 ical[] = {
0x53, 0x54, 0x55, 0x56, 0xf4, 0xf7, 0x144, 0x156, 0x15b
};
u8 *eeprom = dev->mt76.eeprom.data;
u8 *otp = dev->mt76.otp.data;
int i;
if (!otp)
return;
for (i = 0; i < ARRAY_SIZE(ical); i++) {
if (!otp[ical[i]])
continue;
eeprom[ical[i]] = otp[ical[i]];
}
}
static void mt7615_cal_free_data(struct mt7615_dev *dev)
{
struct device_node *np = dev->mt76.dev->of_node;
if (!np || !of_property_read_bool(np, "mediatek,eeprom-merge-otp"))
return;
switch (mt76_chip(&dev->mt76)) {
case 0x7622:
mt7622_apply_cal_free_data(dev);
break;
case 0x7615:
case 0x7611:
mt7615_apply_cal_free_data(dev);
break;
}
}
int mt7615_eeprom_init(struct mt7615_dev *dev, u32 addr)
{
int ret;
ret = mt7615_eeprom_load(dev, addr);
if (ret < 0)
return ret;
ret = mt7615_check_eeprom(&dev->mt76);
if (ret && dev->mt76.otp.data) {
memcpy(dev->mt76.eeprom.data, dev->mt76.otp.data,
MT7615_EEPROM_SIZE);
} else {
dev->flash_eeprom = true;
mt7615_cal_free_data(dev);
}
mt7615_eeprom_parse_hw_cap(dev);
memcpy(dev->mphy.macaddr, dev->mt76.eeprom.data + MT_EE_MAC_ADDR,
ETH_ALEN);
mt76_eeprom_override(&dev->mphy);
return 0;
}
EXPORT_SYMBOL_GPL(mt7615_eeprom_init);
Reference in New Issue View Git Blame Copy Permalink