This patch:
* Internalizes Atheros Turbo modes (MODE_ATHEROS_TURBO, MODE_ATHEROS_TURBOG)
* Internatizes Turbo modulation (MODULATION_TURBO)
* Adds documention for Atheros Turbo modes (MODE_ATHEROS_TURBO,
MODE_ATHEROS_TURBOG), Turbo modulation (MODULATION_TURBO) and XR
modulation (MODULATION_XR)
This patch is intended for the ath5k branch of wireless-dev after a
pull from origin/everything once
01-remove-atheros-turbo-from-mac80211.diff is applied.
drivers/net/wireless/ath5k_base.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
Changes-licensed-under: BSD
Signed-off-by: Luis R. Rodriguez <mcgrof@xxxxxxxxx>
drivers/net/wireless/ath5k.h | 86 +++++++++++++++++++++++++++++++++------
drivers/net/wireless/ath5k_hw.c | 4 +-
2 files changed, 76 insertions(+), 14 deletions(-)
Changes-licensed-under: ISC
Signed-off-by: Luis R. Rodriguez <mcgrof@xxxxxxxxx>
Cc: Zhu Yi <yi.zhu@xxxxxxxxx>
Cc: Jiri Slaby <jirislaby@xxxxxxxxx>
Cc: Michael Wu <flamingice@xxxxxxxxxxxx>
CC: Johannes Berg <johannes@xxxxxxxxxxxxxxxx
Luis
[PATCH] Internalize Atheros Turbo modes and Turbo modulation
This patch:
* Internalizes Atheros Turbo modes (MODE_ATHEROS_TURBO,
MODE_ATHEROS_TURBOG)
* Internatizes Turbo modulation (MODULATION_TURBO)
* Adds documention for Atheros Turbo modes (MODE_ATHEROS_TURBO,
MODE_ATHEROS_TURBOG), Turbo modulation (MODULATION_TURBO) and XR
modulation (MODULATION_XR)
This patch is intended for the ath5k branch of wireless-dev after a pull
from origin/everything once 01-remove-atheros-turbo-from-mac80211.diff is
applied.
drivers/net/wireless/ath5k_base.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
Changes-licensed-under: BSD
Signed-off-by: Luis R. Rodriguez <mcgrof@xxxxxxxxx>
drivers/net/wireless/ath5k.h | 86 +++++++++++++++++++++++++++++++++------
drivers/net/wireless/ath5k_hw.c | 4 +-
2 files changed, 76 insertions(+), 14 deletions(-)
Changes-licensed-under: ISC
Signed-off-by: Luis R. Rodriguez <mcgrof@xxxxxxxxx>
diff --git a/drivers/net/wireless/ath5k.h b/drivers/net/wireless/ath5k.h
index 78d7cb2..a6f7995 100644
--- a/drivers/net/wireless/ath5k.h
+++ b/drivers/net/wireless/ath5k.h
@@ -187,12 +187,72 @@ struct ath5k_srev_name {
#define IEEE80211_MAX_LEN 2500
-/* TODO Merge this to mac80211 */
-#define MODULATION_XR 0x00000200 /*XR thingie*/
+/* TODO add support to mac80211 for vendor-specific rates and modes */
+
+/*
+ * Some of this information is based on Documentation from:
+ *
+ * http://madwifi.org/wiki/ChipsetFeatures/SuperAG
+ *
+ * Modulation for Atheros' eXtended Range - range enhancing extension that is
+ * supposed to double the distance an Atheros client device can keep a
+ * connection with an Atheros access point. This is achieved by increasing
+ * the receiver sensitivity up to, -105dBm, which is about 20dB above what
+ * the 802.11 specifications demand. In addition, new (proprietary) data rates
+ * are introduced: 3, 2, 1, 0.5 and 0.25 MBit/s.
+ *
+ * Please note that can you either use XR or TURBO but you cannot use both,
+ * they are exclusive.
+ *
+ */
+#define MODULATION_XR 0x00000200
+/*
+ * Modulation for Atheros' Turbo G and Turbo A, its supposed to provide a
+ * throughput transmission speed up to 40Mbit/s-60Mbit/s at a 108Mbit/s
+ * signaling rate achieved through the bonding of two 54Mbit/s 802.11g
+ * channels. To use this feature your Access Point must also suport it.
+ * There is also a distinction between "static" and "dynamic" turbo modes:
+ *
+ * - Static: is the dumb version: devices set to this mode stick to it until
+ * the mode is turned off.
+ * - Dynamic: is the intelligent version, the network decides itself if it
+ * is ok to use turbo. As soon as traffic is detected on adjacent channels
+ * (which would get used in turbo mode), or when a non-turbo station joins
+ * the network, turbo mode won't be used until the situation changes again.
+ * Dynamic mode is achieved by Atheros' Adaptive Radio (AR) feature which
+ * monitors the used radio band in order to decide whether turbo mode may
+ * be used or not.
+ *
+ * This article claims Super G sticks to bonding of channels 5 and 6 for
+ * USA:
+ *
+ * http://www.pcworld.com/article/id,113428-page,1/article.html
+ *
+ * The channel bonding seems to be driver specific though. In addition to
+ * deciding what channels will be used, these "Turbo" modes are accomplished
+ * by also enabling the following features:
+ *
+ * - Bursting: allows multiple frames to be sent at once, rather than pausing
+ * after each frame. Bursting is a standards-compliant feature that can be
+ * used with any Access Point.
+ * - Fast frames: increases the amount of information that can be sent per
+ * frame, also resulting in a reduction of transmission overhead. It is a
+ * proprietary feature that needs to be supported by the Access Point.
+ * - Compression: data frames are compressed in real time using a Lempel Ziv
+ * algorithm. This is done transparently. Once this feature is enabled,
+ * compression and decompression takes place inside the chipset, without
+ * putting additional load on the host CPU.
+ */
+#define MODULATION_TURBO 0x00000080
+
+enum ath5k_vendor_mode {
+ MODE_ATHEROS_TURBO = NUM_IEEE80211_MODES+1,
+ MODE_ATHEROS_TURBOG
+};
+
+/* adding this flag to rate_code enables short preamble, see ar5212_reg.h */
+#define AR5K_SET_SHORT_PREAMBLE 0x04
-#define AR5K_SET_SHORT_PREAMBLE 0x04 /* adding this flag to rate_code
- enables short preamble, see
- ar5212_reg.h */
#define HAS_SHPREAMBLE(_ix) (rt->rates[_ix].modulation == IEEE80211_RATE_CCK_2)
#define SHPREAMBLE_FLAG(_ix) (HAS_SHPREAMBLE(_ix) ? AR5K_SET_SHORT_PREAMBLE : 0)
@@ -636,14 +696,14 @@ struct ath5k_rate_table {
255, 255, 255, 255, 255, 255, 255, 255, 6, 4, 2, 0, \
7, 5, 3, 1, 255, 255, 255, 255, 255, 255, 255, 255, \
255, 255, 255, 255, 255, 255, 255, 255 }, { \
- { 1, IEEE80211_RATE_TURBO, 6000, 11, 140, 0 }, \
- { 1, IEEE80211_RATE_TURBO, 9000, 15, 18, 0 }, \
- { 1, IEEE80211_RATE_TURBO, 12000, 10, 152, 2 }, \
- { 1, IEEE80211_RATE_TURBO, 18000, 14, 36, 2 }, \
- { 1, IEEE80211_RATE_TURBO, 24000, 9, 176, 4 }, \
- { 1, IEEE80211_RATE_TURBO, 36000, 13, 72, 4 }, \
- { 1, IEEE80211_RATE_TURBO, 48000, 8, 96, 4 }, \
- { 1, IEEE80211_RATE_TURBO, 54000, 12, 108, 4 } } \
+ { 1, MODULATION_TURBO, 6000, 11, 140, 0 }, \
+ { 1, MODULATION_TURBO, 9000, 15, 18, 0 }, \
+ { 1, MODULATION_TURBO, 12000, 10, 152, 2 }, \
+ { 1, MODULATION_TURBO, 18000, 14, 36, 2 }, \
+ { 1, MODULATION_TURBO, 24000, 9, 176, 4 }, \
+ { 1, MODULATION_TURBO, 36000, 13, 72, 4 }, \
+ { 1, MODULATION_TURBO, 48000, 8, 96, 4 }, \
+ { 1, MODULATION_TURBO, 54000, 12, 108, 4 } } \
}
#define AR5K_RATES_XR { 12, { \
diff --git a/drivers/net/wireless/ath5k_base.c b/drivers/net/wireless/ath5k_base.c
index ba26ead..6a437df 100644
--- a/drivers/net/wireless/ath5k_base.c
+++ b/drivers/net/wireless/ath5k_base.c
@@ -1844,7 +1844,7 @@ static int ath_getchannels(struct ieee80211_hw *hw)
TG = MODE_ATHEROS_TURBOG,
};
- BUILD_BUG_ON(ARRAY_SIZE(sc->modes) < 5);
+ BUILD_BUG_ON(ARRAY_SIZE(sc->modes) < 3);
ah->ah_country_code = countrycode;
diff --git a/drivers/net/wireless/ath5k_hw.c b/drivers/net/wireless/ath5k_hw.c
index 07ad127..e4cc307 100644
--- a/drivers/net/wireless/ath5k_hw.c
+++ b/drivers/net/wireless/ath5k_hw.c
@@ -142,6 +142,7 @@ ath_hal_computetxtime(struct ath_hw *hal, const struct ath5k_rate_table *rates,
* Calculate the transmission time by operation (PHY) mode
*/
switch (rate->modulation) {
+ /* Standard rates */
case IEEE80211_RATE_CCK:
/*
* CCK / DS mode (802.11b)
@@ -160,7 +161,8 @@ ath_hal_computetxtime(struct ath_hw *hal, const struct ath5k_rate_table *rates,
value = AR5K_OFDM_TX_TIME(rate->rate_kbps, frame_length);
break;
- case IEEE80211_RATE_TURBO:
+ /* Vendor-specific rates */
+ case MODULATION_TURBO:
/*
* Orthogonal Frequency Division Multiplexing
* Atheros "Turbo Mode" (doubled rates)
