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kernel/rtl8180-improve-signal-repo...

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commit 8b73fb8e29e9ae0458d36cc0dc25e2717587dfd4
Author: John W. Linville <linville@tuxdriver.com>
Date: Wed Jul 21 16:26:40 2010 -0400
rtl8180: improve signal reporting for actual rtl8180 hardware
Adapted from Realtek-provided driver...
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Tested-by: Pauli Nieminen <suokkos@gmail.com>
diff --git a/drivers/net/wireless/rtl818x/rtl8180_dev.c b/drivers/net/wireless/rtl818x/rtl8180_dev.c
index 31808f9..d8b186a 100644
--- a/drivers/net/wireless/rtl818x/rtl8180_dev.c
+++ b/drivers/net/wireless/rtl818x/rtl8180_dev.c
@@ -103,7 +103,7 @@ static void rtl8180_handle_rx(struct ieee80211_hw *dev)
{
struct rtl8180_priv *priv = dev->priv;
unsigned int count = 32;
- u8 signal;
+ u8 signal, agc, sq;
while (count--) {
struct rtl8180_rx_desc *entry = &priv->rx_ring[priv->rx_idx];
@@ -132,12 +132,16 @@ static void rtl8180_handle_rx(struct ieee80211_hw *dev)
rx_status.antenna = (flags2 >> 15) & 1;
rx_status.rate_idx = (flags >> 20) & 0xF;
- /* TODO: improve signal/rssi reporting for !rtl8185 */
- signal = (flags2 >> 17) & 0x7F;
- if (rx_status.rate_idx > 3)
- signal = 90 - clamp_t(u8, signal, 25, 90);
- else
- signal = 95 - clamp_t(u8, signal, 30, 95);
+ agc = (flags2 >> 17) & 0x7F;
+ if (priv->r8185) {
+ if (rx_status.rate_idx > 3)
+ signal = 90 - clamp_t(u8, agc, 25, 90);
+ else
+ signal = 95 - clamp_t(u8, agc, 30, 95);
+ } else {
+ sq = flags2 & 0xff;
+ signal = priv->rf->calc_rssi(agc, sq);
+ }
rx_status.signal = signal;
rx_status.freq = dev->conf.channel->center_freq;
rx_status.band = dev->conf.channel->band;
diff --git a/drivers/net/wireless/rtl818x/rtl8180_grf5101.c b/drivers/net/wireless/rtl818x/rtl8180_grf5101.c
index 947ee55..5cab9df 100644
--- a/drivers/net/wireless/rtl818x/rtl8180_grf5101.c
+++ b/drivers/net/wireless/rtl818x/rtl8180_grf5101.c
@@ -69,6 +69,15 @@ static void grf5101_write_phy_antenna(struct ieee80211_hw *dev, short chan)
rtl8180_write_phy(dev, 0x10, ant);
}
+static u8 grf5101_rf_calc_rssi(u8 agc, u8 sq)
+{
+ if (agc > 60)
+ return 65;
+
+ /* TODO(?): just return agc (or agc + 5) to avoid mult / div */
+ return 65 * agc / 60;
+}
+
static void grf5101_rf_set_channel(struct ieee80211_hw *dev,
struct ieee80211_conf *conf)
{
@@ -176,5 +185,6 @@ const struct rtl818x_rf_ops grf5101_rf_ops = {
.name = "GCT",
.init = grf5101_rf_init,
.stop = grf5101_rf_stop,
- .set_chan = grf5101_rf_set_channel
+ .set_chan = grf5101_rf_set_channel,
+ .calc_rssi = grf5101_rf_calc_rssi,
};
diff --git a/drivers/net/wireless/rtl818x/rtl8180_max2820.c b/drivers/net/wireless/rtl818x/rtl8180_max2820.c
index 6c825fd..16c4655 100644
--- a/drivers/net/wireless/rtl818x/rtl8180_max2820.c
+++ b/drivers/net/wireless/rtl818x/rtl8180_max2820.c
@@ -74,6 +74,22 @@ static void max2820_write_phy_antenna(struct ieee80211_hw *dev, short chan)
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)
{
@@ -148,5 +164,6 @@ const struct rtl818x_rf_ops max2820_rf_ops = {
.name = "Maxim",
.init = max2820_rf_init,
.stop = max2820_rf_stop,
- .set_chan = max2820_rf_set_channel
+ .set_chan = max2820_rf_set_channel,
+ .calc_rssi = max2820_rf_calc_rssi,
};
diff --git a/drivers/net/wireless/rtl818x/rtl8180_sa2400.c b/drivers/net/wireless/rtl818x/rtl8180_sa2400.c
index cea4e0c..d064fcc 100644
--- a/drivers/net/wireless/rtl818x/rtl8180_sa2400.c
+++ b/drivers/net/wireless/rtl818x/rtl8180_sa2400.c
@@ -76,6 +76,31 @@ static void sa2400_write_phy_antenna(struct ieee80211_hw *dev, short chan)
}
+static u8 sa2400_rf_rssi_map[] = {
+ 0x64, 0x64, 0x63, 0x62, 0x61, 0x60, 0x5f, 0x5e,
+ 0x5d, 0x5c, 0x5b, 0x5a, 0x57, 0x54, 0x52, 0x50,
+ 0x4e, 0x4c, 0x4a, 0x48, 0x46, 0x44, 0x41, 0x3f,
+ 0x3c, 0x3a, 0x37, 0x36, 0x36, 0x1c, 0x1c, 0x1b,
+ 0x1b, 0x1a, 0x1a, 0x19, 0x19, 0x18, 0x18, 0x17,
+ 0x17, 0x16, 0x16, 0x15, 0x15, 0x14, 0x14, 0x13,
+ 0x13, 0x12, 0x12, 0x11, 0x11, 0x10, 0x10, 0x0f,
+ 0x0f, 0x0e, 0x0e, 0x0d, 0x0d, 0x0c, 0x0c, 0x0b,
+ 0x0b, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x07,
+ 0x07, 0x06, 0x06, 0x05, 0x04, 0x03, 0x02,
+};
+
+static u8 sa2400_rf_calc_rssi(u8 agc, u8 sq)
+{
+ if (sq == 0x80)
+ return 1;
+
+ if (sq > 78)
+ return 32;
+
+ /* TODO: recalc sa2400_rf_rssi_map to avoid mult / div */
+ return 65 * sa2400_rf_rssi_map[sq] / 100;
+}
+
static void sa2400_rf_set_channel(struct ieee80211_hw *dev,
struct ieee80211_conf *conf)
{
@@ -198,5 +223,6 @@ const struct rtl818x_rf_ops sa2400_rf_ops = {
.name = "Philips",
.init = sa2400_rf_init,
.stop = sa2400_rf_stop,
- .set_chan = sa2400_rf_set_channel
+ .set_chan = sa2400_rf_set_channel,
+ .calc_rssi = sa2400_rf_calc_rssi,
};
diff --git a/drivers/net/wireless/rtl818x/rtl818x.h b/drivers/net/wireless/rtl818x/rtl818x.h
index 8522490..22d9384 100644
--- a/drivers/net/wireless/rtl818x/rtl818x.h
+++ b/drivers/net/wireless/rtl818x/rtl818x.h
@@ -193,6 +193,7 @@ struct rtl818x_rf_ops {
void (*stop)(struct ieee80211_hw *);
void (*set_chan)(struct ieee80211_hw *, struct ieee80211_conf *);
void (*conf_erp)(struct ieee80211_hw *, struct ieee80211_bss_conf *);
+ u8 (*calc_rssi)(u8 agc, u8 sq);
};
/**
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