From: Ivo van Doorn Date: Sun, 28 Dec 2008 12:48:46 +0000 (+0100) Subject: rt2x00: Implement support for 802.11n X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Fivd%2Frt2x00.git;a=commitdiff_plain;h=1ddf4bdad5f51a799ee580e125dda19dd18daa39 rt2x00: Implement support for 802.11n Extend rt2x00lib capabilities to support 802.11n, it still lacks aggregation support, but that can be added in the future. Signed-off-by: Ivo van Doorn --- --- a/drivers/net/wireless/rt2x00/Makefile +++ b/drivers/net/wireless/rt2x00/Makefile @@ -8,6 +8,7 @@ rt2x00lib-$(CONFIG_RT2X00_LIB_CRYPTO) += rt2x00lib-$(CONFIG_RT2X00_LIB_RFKILL) += rt2x00rfkill.o rt2x00lib-$(CONFIG_RT2X00_LIB_FIRMWARE) += rt2x00firmware.o rt2x00lib-$(CONFIG_RT2X00_LIB_LEDS) += rt2x00leds.o +rt2x00lib-$(CONFIG_RT2X00_LIB_HT) += rt2x00ht.o obj-$(CONFIG_RT2X00_LIB) += rt2x00lib.o obj-$(CONFIG_RT2X00_LIB_PCI) += rt2x00pci.o --- a/drivers/net/wireless/rt2x00/rt2x00.h +++ b/drivers/net/wireless/rt2x00/rt2x00.h @@ -107,6 +107,7 @@ */ #define ACK_SIZE 14 #define IEEE80211_HEADER 24 +#define AGGREGATION_SIZE 3840 #define PLCP 48 #define BEACON 100 #define PREAMBLE 144 @@ -356,6 +357,7 @@ static inline struct rt2x00_intf* vif_to * for @tx_power_a, @tx_power_bg and @channels. * @channels: Device/chipset specific channel values (See &struct rf_channel). * @channels_info: Additional information for channels (See &struct channel_info). + * @ht: Driver HT Capabilities (See &ieee80211_sta_ht_cap). */ struct hw_mode_spec { unsigned int supported_bands; @@ -369,6 +371,8 @@ struct hw_mode_spec { unsigned int num_channels; const struct rf_channel *channels; const struct channel_info *channels_info; + + struct ieee80211_sta_ht_cap ht; }; /* @@ -603,6 +607,7 @@ enum rt2x00_flags { CONFIG_EXTERNAL_LNA_BG, CONFIG_DOUBLE_ANTENNA, CONFIG_DISABLE_LINK_TUNING, + CONFIG_CHANNEL_HT40, }; /* --- a/drivers/net/wireless/rt2x00/rt2x00config.c +++ b/drivers/net/wireless/rt2x00/rt2x00config.c @@ -173,6 +173,12 @@ void rt2x00lib_config(struct rt2x00_dev libconf.conf = conf; if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL) { + if ((conf->ht.channel_type == NL80211_CHAN_HT40MINUS) || + (conf->ht.channel_type == NL80211_CHAN_HT40PLUS)) + __set_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags); + else + __clear_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags); + memcpy(&libconf.rf, &rt2x00dev->spec.channels[conf->channel->hw_value], sizeof(libconf.rf)); --- a/drivers/net/wireless/rt2x00/rt2x00dev.c +++ b/drivers/net/wireless/rt2x00/rt2x00dev.c @@ -384,7 +384,9 @@ void rt2x00lib_rxdone(struct rt2x00_dev if (((rxdesc.dev_flags & RXDONE_SIGNAL_PLCP) && (rate->plcp == rxdesc.signal)) || ((rxdesc.dev_flags & RXDONE_SIGNAL_BITRATE) && - (rate->bitrate == rxdesc.signal))) { + (rate->bitrate == rxdesc.signal)) || + ((rxdesc.dev_flags & RXDONE_SIGNAL_MCS) && + (rate->mcs == rxdesc.signal))) { idx = i; break; } @@ -439,72 +441,84 @@ const struct rt2x00_rate rt2x00_supporte .bitrate = 10, .ratemask = BIT(0), .plcp = 0x00, + .mcs = RATE_MCS(RATE_MODE_CCK, 0), }, { .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE, .bitrate = 20, .ratemask = BIT(1), .plcp = 0x01, + .mcs = RATE_MCS(RATE_MODE_CCK, 1), }, { .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE, .bitrate = 55, .ratemask = BIT(2), .plcp = 0x02, + .mcs = RATE_MCS(RATE_MODE_CCK, 2), }, { .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE, .bitrate = 110, .ratemask = BIT(3), .plcp = 0x03, + .mcs = RATE_MCS(RATE_MODE_CCK, 3), }, { .flags = DEV_RATE_OFDM, .bitrate = 60, .ratemask = BIT(4), .plcp = 0x0b, + .mcs = RATE_MCS(RATE_MODE_OFDM, 0), }, { .flags = DEV_RATE_OFDM, .bitrate = 90, .ratemask = BIT(5), .plcp = 0x0f, + .mcs = RATE_MCS(RATE_MODE_OFDM, 1), }, { .flags = DEV_RATE_OFDM, .bitrate = 120, .ratemask = BIT(6), .plcp = 0x0a, + .mcs = RATE_MCS(RATE_MODE_OFDM, 2), }, { .flags = DEV_RATE_OFDM, .bitrate = 180, .ratemask = BIT(7), .plcp = 0x0e, + .mcs = RATE_MCS(RATE_MODE_OFDM, 3), }, { .flags = DEV_RATE_OFDM, .bitrate = 240, .ratemask = BIT(8), .plcp = 0x09, + .mcs = RATE_MCS(RATE_MODE_OFDM, 4), }, { .flags = DEV_RATE_OFDM, .bitrate = 360, .ratemask = BIT(9), .plcp = 0x0d, + .mcs = RATE_MCS(RATE_MODE_OFDM, 5), }, { .flags = DEV_RATE_OFDM, .bitrate = 480, .ratemask = BIT(10), .plcp = 0x08, + .mcs = RATE_MCS(RATE_MODE_OFDM, 6), }, { .flags = DEV_RATE_OFDM, .bitrate = 540, .ratemask = BIT(11), .plcp = 0x0c, + .mcs = RATE_MCS(RATE_MODE_OFDM, 7), }, }; @@ -582,6 +596,8 @@ static int rt2x00lib_probe_hw_modes(stru rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates; hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &rt2x00dev->bands[IEEE80211_BAND_2GHZ]; + memcpy(&rt2x00dev->bands[IEEE80211_BAND_2GHZ].ht_cap, + &spec->ht, sizeof(spec->ht)); } /* @@ -598,6 +614,8 @@ static int rt2x00lib_probe_hw_modes(stru rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4]; hw->wiphy->bands[IEEE80211_BAND_5GHZ] = &rt2x00dev->bands[IEEE80211_BAND_5GHZ]; + memcpy(&rt2x00dev->bands[IEEE80211_BAND_5GHZ].ht_cap, + &spec->ht, sizeof(spec->ht)); } return 0; --- /dev/null +++ b/drivers/net/wireless/rt2x00/rt2x00ht.c @@ -0,0 +1,69 @@ +/* + Copyright (C) 2004 - 2008 rt2x00 SourceForge Project + + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the + Free Software Foundation, Inc., + 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +/* + Module: rt2x00lib + Abstract: rt2x00 HT specific routines. + */ + +#include +#include + +#include "rt2x00.h" +#include "rt2x00lib.h" + +void rt2x00ht_create_tx_descriptor(struct queue_entry *entry, + struct txentry_desc *txdesc, + struct ieee80211_rate *rate) +{ + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb); + const struct rt2x00_rate *hwrate = rt2x00_get_rate(rate->hw_value); + + if (tx_info->control.sta) + txdesc->mpdu_density = + tx_info->control.sta->ht_cap.ampdu_density; + else + txdesc->mpdu_density = 0; + + txdesc->ba_size = 0; /* FIXME: What value is needed? */ + txdesc->stbc = 0; /* FIXME: What value is needed? */ + + txdesc->mcs = rt2x00_get_rate_mcs(hwrate->mcs); + if (rt2x00_get_rate_preamble(rate->hw_value)) + txdesc->mcs |= 0x08; + + /* + * Convert flags + */ + if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) + __set_bit(ENTRY_TXD_HT_AMPDU, &txdesc->flags); + + /* + * Determine HT Mix/Greenfield rate mode + */ + if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_MCS) + txdesc->rate_mode = RATE_MODE_HT_MIX; + if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_GREEN_FIELD) + txdesc->rate_mode = RATE_MODE_HT_GREENFIELD; + if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_40_MHZ_WIDTH) + __set_bit(ENTRY_TXD_HT_BW_40, &txdesc->flags); + if (tx_info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) + __set_bit(ENTRY_TXD_HT_SHORT_GI, &txdesc->flags); +} --- a/drivers/net/wireless/rt2x00/rt2x00lib.h +++ b/drivers/net/wireless/rt2x00/rt2x00lib.h @@ -48,6 +48,7 @@ struct rt2x00_rate { unsigned short ratemask; unsigned short plcp; + unsigned short mcs; }; extern const struct rt2x00_rate rt2x00_supported_rates[12]; @@ -68,6 +69,14 @@ static inline int rt2x00_get_rate_preamb return (hw_value & 0xff00); } +#define RATE_MCS(__mode, __mcs) \ + ( (((__mode) & 0x00ff) << 8) | ((__mcs) & 0x00ff) ) + +static inline int rt2x00_get_rate_mcs(const u16 mcs_value) +{ + return (mcs_value & 0x00ff); +} + /* * Radio control handlers. */ @@ -341,6 +350,21 @@ static inline void rt2x00crypto_rx_inser #endif /* CONFIG_RT2X00_LIB_CRYPTO */ /* + * HT handlers. + */ +#ifdef CONFIG_RT2X00_LIB_HT +void rt2x00ht_create_tx_descriptor(struct queue_entry *entry, + struct txentry_desc *txdesc, + struct ieee80211_rate *rate); +#else +static inline void rt2x00ht_create_tx_descriptor(struct queue_entry *entry, + struct txentry_desc *txdesc, + struct ieee80211_rate *rate) +{ +} +#endif /* CONFIG_RT2X00_LIB_HT */ + +/* * RFkill handlers. */ #ifdef CONFIG_RT2X00_LIB_RFKILL --- a/drivers/net/wireless/rt2x00/rt2x00queue.c +++ b/drivers/net/wireless/rt2x00/rt2x00queue.c @@ -325,6 +325,7 @@ static void rt2x00queue_create_tx_descri * Apply TX descriptor handling by components */ rt2x00crypto_create_tx_descriptor(entry, txdesc); + rt2x00ht_create_tx_descriptor(entry, txdesc, rate); rt2x00queue_create_tx_descriptor_seq(entry, txdesc); rt2x00queue_create_tx_descriptor_plcp(entry, txdesc, rate); } --- a/drivers/net/wireless/rt2x00/rt2x00queue.h +++ b/drivers/net/wireless/rt2x00/rt2x00queue.h @@ -145,6 +145,7 @@ static inline struct skb_frame_desc* get * * @RXDONE_SIGNAL_PLCP: Signal field contains the plcp value. * @RXDONE_SIGNAL_BITRATE: Signal field contains the bitrate value. + * @RXDONE_SIGNAL_MCS: Signal field contains the mcs value. * @RXDONE_MY_BSS: Does this frame originate from device's BSS. * @RXDONE_CRYPTO_IV: Driver provided IV/EIV data. * @RXDONE_CRYPTO_ICV: Driver provided ICV data. @@ -152,9 +153,10 @@ static inline struct skb_frame_desc* get enum rxdone_entry_desc_flags { RXDONE_SIGNAL_PLCP = 1 << 0, RXDONE_SIGNAL_BITRATE = 1 << 1, - RXDONE_MY_BSS = 1 << 2, - RXDONE_CRYPTO_IV = 1 << 3, - RXDONE_CRYPTO_ICV = 1 << 4, + RXDONE_SIGNAL_MCS = 1 << 2, + RXDONE_MY_BSS = 1 << 3, + RXDONE_CRYPTO_IV = 1 << 4, + RXDONE_CRYPTO_ICV = 1 << 5, }; /** @@ -163,7 +165,7 @@ enum rxdone_entry_desc_flags { * from &rxdone_entry_desc to a signal value type. */ #define RXDONE_SIGNAL_MASK \ - ( RXDONE_SIGNAL_PLCP | RXDONE_SIGNAL_BITRATE ) + ( RXDONE_SIGNAL_PLCP | RXDONE_SIGNAL_BITRATE | RXDONE_SIGNAL_MCS ) /** * struct rxdone_entry_desc: RX Entry descriptor @@ -243,6 +245,9 @@ struct txdone_entry_desc { * @ENTRY_TXD_ENCRYPT_PAIRWISE: Use pairwise key table (instead of shared). * @ENTRY_TXD_ENCRYPT_IV: Generate IV/EIV in hardware. * @ENTRY_TXD_ENCRYPT_MMIC: Generate MIC in hardware. + * @ENTRY_TXD_HT_AMPDU: This frame is part of an AMPDU. + * @ENTRY_TXD_HT_BW_40: Use 40MHz Bandwidth. + * @ENTRY_TXD_HT_SHORT_GI: Use short GI. */ enum txentry_desc_flags { ENTRY_TXD_RTS_FRAME, @@ -258,6 +263,9 @@ enum txentry_desc_flags { ENTRY_TXD_ENCRYPT_PAIRWISE, ENTRY_TXD_ENCRYPT_IV, ENTRY_TXD_ENCRYPT_MMIC, + ENTRY_TXD_HT_AMPDU, + ENTRY_TXD_HT_BW_40, + ENTRY_TXD_HT_SHORT_GI, }; /** @@ -271,7 +279,11 @@ enum txentry_desc_flags { * @length_low: PLCP length low word. * @signal: PLCP signal. * @service: PLCP service. + * @msc: MCS. + * @stbc: STBC. + * @ba_size: BA size. * @rate_mode: Rate mode (See @enum rate_modulation). + * @mpdu_density: MDPU density. * @retry_limit: Max number of retries. * @aifs: AIFS value. * @ifs: IFS value. @@ -291,7 +303,11 @@ struct txentry_desc { u16 signal; u16 service; + u16 mcs; + u16 stbc; + u16 ba_size; u16 rate_mode; + u16 mpdu_density; short retry_limit; short aifs;