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mt7603: initialize channel maximum power from eeprom data

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Signed-off-by: Felix Fietkau <[email protected]>
This commit is contained in:
Felix Fietkau
2018-12-06 14:13:29 +01:00
parent 9d009be68d
commit 2c8e9acb40
1 changed files with 49 additions and 0 deletions
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mt7603/init.c
+49
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@@ -468,6 +468,54 @@ mt7603_regd_notifier(struct wiphy *wiphy,
dev->ed_monitor = request->dfs_region == NL80211_DFS_ETSI;
}
static int
mt7603_txpower_signed(int val)
{
bool sign = val & BIT(6);
if (!(val & BIT(7)))
return 0;
val &= GENMASK(5, 0);
if (!sign)
val = -val;
return val;
}
static void
mt7603_init_txpower(struct mt7603_dev *dev,
struct ieee80211_supported_band *sband)
{
struct ieee80211_channel *chan;
u8 *eeprom = (u8 *) dev->mt76.eeprom.data;
int target_power = eeprom[MT_EE_TX_POWER_0_START_2G + 2] & ~BIT(7);
u8 *rate_power = &eeprom[MT_EE_TX_POWER_CCK];
int max_offset, cur_offset;
int i;
if (target_power & BIT(6))
target_power = -(target_power & GENMASK(5, 0));
max_offset = 0;
for (i = 0; i < 14; i++) {
cur_offset = mt7603_txpower_signed(rate_power[i]);
max_offset = max(max_offset, cur_offset);
}
target_power = DIV_ROUND_UP(target_power + max_offset, 2);
/* add 3 dBm for 2SS devices (combined output) */
if (dev->mt76.antenna_mask & BIT(1))
target_power += 3;
for (i = 0; i < sband->n_channels; i++) {
chan = &sband->channels[i];
chan->max_power = target_power;
}
}
int mt7603_register_device(struct mt7603_dev *dev)
{
struct mt76_bus_ops *bus_ops;
@@ -534,6 +582,7 @@ int mt7603_register_device(struct mt7603_dev *dev)
return ret;
mt7603_init_debugfs(dev);
mt7603_init_txpower(dev, &dev->mt76.sband_2g.sband);
return 0;
}