forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
165 lines
3.8 KiB
165 lines
3.8 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* Radio tuning for Maxim max2820 on RTL8180 |
|
* |
|
* Copyright 2007 Andrea Merello <[email protected]> |
|
* |
|
* Code from the BSD driver and the rtl8181 project have been |
|
* very useful to understand certain things |
|
* |
|
* I want to thanks the Authors of such projects and the Ndiswrapper |
|
* project Authors. |
|
* |
|
* A special Big Thanks also is for all people who donated me cards, |
|
* making possible the creation of the original rtl8180 driver |
|
* from which this code is derived! |
|
*/ |
|
|
|
#include <linux/pci.h> |
|
#include <linux/delay.h> |
|
#include <net/mac80211.h> |
|
|
|
#include "rtl8180.h" |
|
#include "max2820.h" |
|
|
|
static const u32 max2820_chan[] = { |
|
12, /* CH 1 */ |
|
17, |
|
22, |
|
27, |
|
32, |
|
37, |
|
42, |
|
47, |
|
52, |
|
57, |
|
62, |
|
67, |
|
72, |
|
84, /* CH 14 */ |
|
}; |
|
|
|
static void write_max2820(struct ieee80211_hw *dev, u8 addr, u32 data) |
|
{ |
|
struct rtl8180_priv *priv = dev->priv; |
|
u32 phy_config; |
|
|
|
phy_config = 0x90 + (data & 0xf); |
|
phy_config <<= 16; |
|
phy_config += addr; |
|
phy_config <<= 8; |
|
phy_config += (data >> 4) & 0xff; |
|
|
|
rtl818x_iowrite32(priv, |
|
(__le32 __iomem *) &priv->map->RFPinsOutput, phy_config); |
|
|
|
msleep(1); |
|
} |
|
|
|
static void max2820_write_phy_antenna(struct ieee80211_hw *dev, short chan) |
|
{ |
|
struct rtl8180_priv *priv = dev->priv; |
|
u8 ant; |
|
|
|
ant = MAXIM_ANTENNA; |
|
if (priv->rfparam & RF_PARAM_ANTBDEFAULT) |
|
ant |= BB_ANTENNA_B; |
|
if (chan == 14) |
|
ant |= BB_ANTATTEN_CHAN14; |
|
|
|
rtl8180_write_phy(dev, 0x10, ant); |
|
} |
|
|
|
static u8 max2820_rf_calc_rssi(u8 agc, u8 sq) |
|
{ |
|
bool odd; |
|
|
|
odd = !!(agc & 1); |
|
|
|
agc >>= 1; |
|
if (odd) |
|
agc += 76; |
|
else |
|
agc += 66; |
|
|
|
/* TODO: change addends above to avoid mult / div below */ |
|
return 65 * agc / 100; |
|
} |
|
|
|
static void max2820_rf_set_channel(struct ieee80211_hw *dev, |
|
struct ieee80211_conf *conf) |
|
{ |
|
struct rtl8180_priv *priv = dev->priv; |
|
int channel = conf ? |
|
ieee80211_frequency_to_channel(conf->chandef.chan->center_freq) : 1; |
|
unsigned int chan_idx = channel - 1; |
|
u32 txpw = priv->channels[chan_idx].hw_value & 0xFF; |
|
u32 chan = max2820_chan[chan_idx]; |
|
|
|
/* While philips SA2400 drive the PA bias from |
|
* sa2400, for MAXIM we do this directly from BB */ |
|
rtl8180_write_phy(dev, 3, txpw); |
|
|
|
max2820_write_phy_antenna(dev, channel); |
|
write_max2820(dev, 3, chan); |
|
} |
|
|
|
static void max2820_rf_stop(struct ieee80211_hw *dev) |
|
{ |
|
rtl8180_write_phy(dev, 3, 0x8); |
|
write_max2820(dev, 1, 0); |
|
} |
|
|
|
|
|
static void max2820_rf_init(struct ieee80211_hw *dev) |
|
{ |
|
struct rtl8180_priv *priv = dev->priv; |
|
|
|
/* MAXIM from netbsd driver */ |
|
write_max2820(dev, 0, 0x007); /* test mode as indicated in datasheet */ |
|
write_max2820(dev, 1, 0x01e); /* enable register */ |
|
write_max2820(dev, 2, 0x001); /* synt register */ |
|
|
|
max2820_rf_set_channel(dev, NULL); |
|
|
|
write_max2820(dev, 4, 0x313); /* rx register */ |
|
|
|
/* PA is driven directly by the BB, we keep the MAXIM bias |
|
* at the highest value in case that setting it to lower |
|
* values may introduce some further attenuation somewhere.. |
|
*/ |
|
write_max2820(dev, 5, 0x00f); |
|
|
|
/* baseband configuration */ |
|
rtl8180_write_phy(dev, 0, 0x88); /* sys1 */ |
|
rtl8180_write_phy(dev, 3, 0x08); /* txagc */ |
|
rtl8180_write_phy(dev, 4, 0xf8); /* lnadet */ |
|
rtl8180_write_phy(dev, 5, 0x90); /* ifagcinit */ |
|
rtl8180_write_phy(dev, 6, 0x1a); /* ifagclimit */ |
|
rtl8180_write_phy(dev, 7, 0x64); /* ifagcdet */ |
|
|
|
max2820_write_phy_antenna(dev, 1); |
|
|
|
rtl8180_write_phy(dev, 0x11, 0x88); /* trl */ |
|
|
|
if (rtl818x_ioread8(priv, &priv->map->CONFIG2) & |
|
RTL818X_CONFIG2_ANTENNA_DIV) |
|
rtl8180_write_phy(dev, 0x12, 0xc7); |
|
else |
|
rtl8180_write_phy(dev, 0x12, 0x47); |
|
|
|
rtl8180_write_phy(dev, 0x13, 0x9b); |
|
|
|
rtl8180_write_phy(dev, 0x19, 0x0); /* CHESTLIM */ |
|
rtl8180_write_phy(dev, 0x1a, 0x9f); /* CHSQLIM */ |
|
|
|
max2820_rf_set_channel(dev, NULL); |
|
} |
|
|
|
const struct rtl818x_rf_ops max2820_rf_ops = { |
|
.name = "Maxim", |
|
.init = max2820_rf_init, |
|
.stop = max2820_rf_stop, |
|
.set_chan = max2820_rf_set_channel, |
|
.calc_rssi = max2820_rf_calc_rssi, |
|
};
|
|
|