| /* |
| * Copyright (c) 2008 Atheros Communications Inc. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| /* mac80211 and PCI callbacks */ |
| |
| #include <linux/nl80211.h> |
| #include "core.h" |
| |
| #define ATH_PCI_VERSION "0.1" |
| |
| #define IEEE80211_HTCAP_MAXRXAMPDU_FACTOR 13 |
| #define IEEE80211_ACTION_CAT_HT 7 |
| #define IEEE80211_ACTION_HT_TXCHWIDTH 0 |
| |
| static char *dev_info = "ath9k"; |
| |
| MODULE_AUTHOR("Atheros Communications"); |
| MODULE_DESCRIPTION("Support for Atheros 802.11n wireless LAN cards."); |
| MODULE_SUPPORTED_DEVICE("Atheros 802.11n WLAN cards"); |
| MODULE_LICENSE("Dual BSD/GPL"); |
| |
| static struct pci_device_id ath_pci_id_table[] __devinitdata = { |
| { PCI_VDEVICE(ATHEROS, 0x0023) }, /* PCI */ |
| { PCI_VDEVICE(ATHEROS, 0x0024) }, /* PCI-E */ |
| { PCI_VDEVICE(ATHEROS, 0x0027) }, /* PCI */ |
| { PCI_VDEVICE(ATHEROS, 0x0029) }, /* PCI */ |
| { PCI_VDEVICE(ATHEROS, 0x002A) }, /* PCI-E */ |
| { 0 } |
| }; |
| |
| static int ath_get_channel(struct ath_softc *sc, |
| struct ieee80211_channel *chan) |
| { |
| int i; |
| |
| for (i = 0; i < sc->sc_ah->ah_nchan; i++) { |
| if (sc->sc_ah->ah_channels[i].channel == chan->center_freq) |
| return i; |
| } |
| |
| return -1; |
| } |
| |
| static u32 ath_get_extchanmode(struct ath_softc *sc, |
| struct ieee80211_channel *chan) |
| { |
| u32 chanmode = 0; |
| u8 ext_chan_offset = sc->sc_ht_info.ext_chan_offset; |
| enum ath9k_ht_macmode tx_chan_width = sc->sc_ht_info.tx_chan_width; |
| |
| switch (chan->band) { |
| case IEEE80211_BAND_2GHZ: |
| if ((ext_chan_offset == IEEE80211_HT_IE_CHA_SEC_NONE) && |
| (tx_chan_width == ATH9K_HT_MACMODE_20)) |
| chanmode = CHANNEL_G_HT20; |
| if ((ext_chan_offset == IEEE80211_HT_IE_CHA_SEC_ABOVE) && |
| (tx_chan_width == ATH9K_HT_MACMODE_2040)) |
| chanmode = CHANNEL_G_HT40PLUS; |
| if ((ext_chan_offset == IEEE80211_HT_IE_CHA_SEC_BELOW) && |
| (tx_chan_width == ATH9K_HT_MACMODE_2040)) |
| chanmode = CHANNEL_G_HT40MINUS; |
| break; |
| case IEEE80211_BAND_5GHZ: |
| if ((ext_chan_offset == IEEE80211_HT_IE_CHA_SEC_NONE) && |
| (tx_chan_width == ATH9K_HT_MACMODE_20)) |
| chanmode = CHANNEL_A_HT20; |
| if ((ext_chan_offset == IEEE80211_HT_IE_CHA_SEC_ABOVE) && |
| (tx_chan_width == ATH9K_HT_MACMODE_2040)) |
| chanmode = CHANNEL_A_HT40PLUS; |
| if ((ext_chan_offset == IEEE80211_HT_IE_CHA_SEC_BELOW) && |
| (tx_chan_width == ATH9K_HT_MACMODE_2040)) |
| chanmode = CHANNEL_A_HT40MINUS; |
| break; |
| default: |
| break; |
| } |
| |
| return chanmode; |
| } |
| |
| |
| static int ath_setkey_tkip(struct ath_softc *sc, |
| struct ieee80211_key_conf *key, |
| struct ath9k_keyval *hk, |
| const u8 *addr) |
| { |
| u8 *key_rxmic = NULL; |
| u8 *key_txmic = NULL; |
| |
| key_txmic = key->key + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY; |
| key_rxmic = key->key + NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY; |
| |
| if (addr == NULL) { |
| /* Group key installation */ |
| memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic)); |
| return ath_keyset(sc, key->keyidx, hk, addr); |
| } |
| if (!sc->sc_splitmic) { |
| /* |
| * data key goes at first index, |
| * the hal handles the MIC keys at index+64. |
| */ |
| memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic)); |
| memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_txmic)); |
| return ath_keyset(sc, key->keyidx, hk, addr); |
| } |
| /* |
| * TX key goes at first index, RX key at +32. |
| * The hal handles the MIC keys at index+64. |
| */ |
| memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic)); |
| if (!ath_keyset(sc, key->keyidx, hk, NULL)) { |
| /* Txmic entry failed. No need to proceed further */ |
| DPRINTF(sc, ATH_DBG_KEYCACHE, |
| "%s Setting TX MIC Key Failed\n", __func__); |
| return 0; |
| } |
| |
| memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic)); |
| /* XXX delete tx key on failure? */ |
| return ath_keyset(sc, key->keyidx+32, hk, addr); |
| } |
| |
| static int ath_key_config(struct ath_softc *sc, |
| const u8 *addr, |
| struct ieee80211_key_conf *key) |
| { |
| struct ieee80211_vif *vif; |
| struct ath9k_keyval hk; |
| const u8 *mac = NULL; |
| int ret = 0; |
| enum ieee80211_if_types opmode; |
| |
| memset(&hk, 0, sizeof(hk)); |
| |
| switch (key->alg) { |
| case ALG_WEP: |
| hk.kv_type = ATH9K_CIPHER_WEP; |
| break; |
| case ALG_TKIP: |
| hk.kv_type = ATH9K_CIPHER_TKIP; |
| break; |
| case ALG_CCMP: |
| hk.kv_type = ATH9K_CIPHER_AES_CCM; |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| hk.kv_len = key->keylen; |
| memcpy(hk.kv_val, key->key, key->keylen); |
| |
| if (!sc->sc_vaps[0]) |
| return -EIO; |
| |
| vif = sc->sc_vaps[0]->av_if_data; |
| opmode = vif->type; |
| |
| /* |
| * Strategy: |
| * For _M_STA mc tx, we will not setup a key at all since we never |
| * tx mc. |
| * _M_STA mc rx, we will use the keyID. |
| * for _M_IBSS mc tx, we will use the keyID, and no macaddr. |
| * for _M_IBSS mc rx, we will alloc a slot and plumb the mac of the |
| * peer node. BUT we will plumb a cleartext key so that we can do |
| * perSta default key table lookup in software. |
| */ |
| if (is_broadcast_ether_addr(addr)) { |
| switch (opmode) { |
| case IEEE80211_IF_TYPE_STA: |
| /* default key: could be group WPA key |
| * or could be static WEP key */ |
| mac = NULL; |
| break; |
| case IEEE80211_IF_TYPE_IBSS: |
| break; |
| case IEEE80211_IF_TYPE_AP: |
| break; |
| default: |
| ASSERT(0); |
| break; |
| } |
| } else { |
| mac = addr; |
| } |
| |
| if (key->alg == ALG_TKIP) |
| ret = ath_setkey_tkip(sc, key, &hk, mac); |
| else |
| ret = ath_keyset(sc, key->keyidx, &hk, mac); |
| |
| if (!ret) |
| return -EIO; |
| |
| sc->sc_keytype = hk.kv_type; |
| return 0; |
| } |
| |
| static void ath_key_delete(struct ath_softc *sc, struct ieee80211_key_conf *key) |
| { |
| #define ATH_MAX_NUM_KEYS 4 |
| int freeslot; |
| |
| freeslot = (key->keyidx >= ATH_MAX_NUM_KEYS) ? 1 : 0; |
| ath_key_reset(sc, key->keyidx, freeslot); |
| #undef ATH_MAX_NUM_KEYS |
| } |
| |
| static void setup_ht_cap(struct ieee80211_ht_info *ht_info) |
| { |
| /* Until mac80211 includes these fields */ |
| |
| #define IEEE80211_HT_CAP_DSSSCCK40 0x1000 |
| #define IEEE80211_HT_CAP_MAXRXAMPDU_65536 0x3 /* 2 ^ 16 */ |
| #define IEEE80211_HT_CAP_MPDUDENSITY_8 0x6 /* 8 usec */ |
| |
| ht_info->ht_supported = 1; |
| ht_info->cap = (u16)IEEE80211_HT_CAP_SUP_WIDTH |
| |(u16)IEEE80211_HT_CAP_MIMO_PS |
| |(u16)IEEE80211_HT_CAP_SGI_40 |
| |(u16)IEEE80211_HT_CAP_DSSSCCK40; |
| |
| ht_info->ampdu_factor = IEEE80211_HT_CAP_MAXRXAMPDU_65536; |
| ht_info->ampdu_density = IEEE80211_HT_CAP_MPDUDENSITY_8; |
| /* setup supported mcs set */ |
| memset(ht_info->supp_mcs_set, 0, 16); |
| ht_info->supp_mcs_set[0] = 0xff; |
| ht_info->supp_mcs_set[1] = 0xff; |
| ht_info->supp_mcs_set[12] = IEEE80211_HT_CAP_MCS_TX_DEFINED; |
| } |
| |
| static int ath_rate2idx(struct ath_softc *sc, int rate) |
| { |
| int i = 0, cur_band, n_rates; |
| struct ieee80211_hw *hw = sc->hw; |
| |
| cur_band = hw->conf.channel->band; |
| n_rates = sc->sbands[cur_band].n_bitrates; |
| |
| for (i = 0; i < n_rates; i++) { |
| if (sc->sbands[cur_band].bitrates[i].bitrate == rate) |
| break; |
| } |
| |
| /* |
| * NB:mac80211 validates rx rate index against the supported legacy rate |
| * index only (should be done against ht rates also), return the highest |
| * legacy rate index for rx rate which does not match any one of the |
| * supported basic and extended rates to make mac80211 happy. |
| * The following hack will be cleaned up once the issue with |
| * the rx rate index validation in mac80211 is fixed. |
| */ |
| if (i == n_rates) |
| return n_rates - 1; |
| return i; |
| } |
| |
| static void ath9k_rx_prepare(struct ath_softc *sc, |
| struct sk_buff *skb, |
| struct ath_recv_status *status, |
| struct ieee80211_rx_status *rx_status) |
| { |
| struct ieee80211_hw *hw = sc->hw; |
| struct ieee80211_channel *curchan = hw->conf.channel; |
| |
| memset(rx_status, 0, sizeof(struct ieee80211_rx_status)); |
| |
| rx_status->mactime = status->tsf; |
| rx_status->band = curchan->band; |
| rx_status->freq = curchan->center_freq; |
| rx_status->noise = ATH_DEFAULT_NOISE_FLOOR; |
| rx_status->signal = rx_status->noise + status->rssi; |
| rx_status->rate_idx = ath_rate2idx(sc, (status->rateKbps / 100)); |
| rx_status->antenna = status->antenna; |
| rx_status->qual = status->rssi * 100 / 64; |
| |
| if (status->flags & ATH_RX_MIC_ERROR) |
| rx_status->flag |= RX_FLAG_MMIC_ERROR; |
| if (status->flags & ATH_RX_FCS_ERROR) |
| rx_status->flag |= RX_FLAG_FAILED_FCS_CRC; |
| |
| rx_status->flag |= RX_FLAG_TSFT; |
| } |
| |
| static u8 parse_mpdudensity(u8 mpdudensity) |
| { |
| /* |
| * 802.11n D2.0 defined values for "Minimum MPDU Start Spacing": |
| * 0 for no restriction |
| * 1 for 1/4 us |
| * 2 for 1/2 us |
| * 3 for 1 us |
| * 4 for 2 us |
| * 5 for 4 us |
| * 6 for 8 us |
| * 7 for 16 us |
| */ |
| switch (mpdudensity) { |
| case 0: |
| return 0; |
| case 1: |
| case 2: |
| case 3: |
| /* Our lower layer calculations limit our precision to |
| 1 microsecond */ |
| return 1; |
| case 4: |
| return 2; |
| case 5: |
| return 4; |
| case 6: |
| return 8; |
| case 7: |
| return 16; |
| default: |
| return 0; |
| } |
| } |
| |
| static int ath9k_start(struct ieee80211_hw *hw) |
| { |
| struct ath_softc *sc = hw->priv; |
| struct ieee80211_channel *curchan = hw->conf.channel; |
| int error = 0, pos; |
| |
| DPRINTF(sc, ATH_DBG_CONFIG, "%s: Starting driver with " |
| "initial channel: %d MHz\n", __func__, curchan->center_freq); |
| |
| /* setup initial channel */ |
| |
| pos = ath_get_channel(sc, curchan); |
| if (pos == -1) { |
| DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__); |
| return -EINVAL; |
| } |
| |
| sc->sc_ah->ah_channels[pos].chanmode = |
| (curchan->band == IEEE80211_BAND_2GHZ) ? CHANNEL_G : CHANNEL_A; |
| |
| /* open ath_dev */ |
| error = ath_open(sc, &sc->sc_ah->ah_channels[pos]); |
| if (error) { |
| DPRINTF(sc, ATH_DBG_FATAL, |
| "%s: Unable to complete ath_open\n", __func__); |
| return error; |
| } |
| |
| ieee80211_wake_queues(hw); |
| return 0; |
| } |
| |
| static int ath9k_tx(struct ieee80211_hw *hw, |
| struct sk_buff *skb) |
| { |
| struct ath_softc *sc = hw->priv; |
| int hdrlen, padsize; |
| |
| /* Add the padding after the header if this is not already done */ |
| hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
| if (hdrlen & 3) { |
| padsize = hdrlen % 4; |
| if (skb_headroom(skb) < padsize) |
| return -1; |
| skb_push(skb, padsize); |
| memmove(skb->data, skb->data + padsize, hdrlen); |
| } |
| |
| DPRINTF(sc, ATH_DBG_XMIT, "%s: transmitting packet, skb: %p\n", |
| __func__, |
| skb); |
| |
| if (ath_tx_start(sc, skb) != 0) { |
| DPRINTF(sc, ATH_DBG_XMIT, "%s: TX failed\n", __func__); |
| dev_kfree_skb_any(skb); |
| /* FIXME: Check for proper return value from ATH_DEV */ |
| return 0; |
| } |
| |
| return 0; |
| } |
| |
| static void ath9k_stop(struct ieee80211_hw *hw) |
| { |
| struct ath_softc *sc = hw->priv; |
| int error; |
| |
| DPRINTF(sc, ATH_DBG_CONFIG, "%s: Driver halt\n", __func__); |
| |
| error = ath_suspend(sc); |
| if (error) |
| DPRINTF(sc, ATH_DBG_CONFIG, |
| "%s: Device is no longer present\n", __func__); |
| |
| ieee80211_stop_queues(hw); |
| } |
| |
| static int ath9k_add_interface(struct ieee80211_hw *hw, |
| struct ieee80211_if_init_conf *conf) |
| { |
| struct ath_softc *sc = hw->priv; |
| int error, ic_opmode = 0; |
| |
| /* Support only vap for now */ |
| |
| if (sc->sc_nvaps) |
| return -ENOBUFS; |
| |
| switch (conf->type) { |
| case IEEE80211_IF_TYPE_STA: |
| ic_opmode = ATH9K_M_STA; |
| break; |
| case IEEE80211_IF_TYPE_IBSS: |
| ic_opmode = ATH9K_M_IBSS; |
| break; |
| default: |
| DPRINTF(sc, ATH_DBG_FATAL, |
| "%s: Only STA and IBSS are supported currently\n", |
| __func__); |
| return -EOPNOTSUPP; |
| } |
| |
| DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach a VAP of type: %d\n", |
| __func__, |
| ic_opmode); |
| |
| error = ath_vap_attach(sc, 0, conf->vif, ic_opmode); |
| if (error) { |
| DPRINTF(sc, ATH_DBG_FATAL, |
| "%s: Unable to attach vap, error: %d\n", |
| __func__, error); |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| static void ath9k_remove_interface(struct ieee80211_hw *hw, |
| struct ieee80211_if_init_conf *conf) |
| { |
| struct ath_softc *sc = hw->priv; |
| struct ath_vap *avp; |
| int error; |
| |
| DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach VAP\n", __func__); |
| |
| avp = sc->sc_vaps[0]; |
| if (avp == NULL) { |
| DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n", |
| __func__); |
| return; |
| } |
| |
| #ifdef CONFIG_SLOW_ANT_DIV |
| ath_slow_ant_div_stop(&sc->sc_antdiv); |
| #endif |
| |
| /* Update ratectrl */ |
| ath_rate_newstate(sc, avp); |
| |
| /* Reclaim beacon resources */ |
| if (sc->sc_ah->ah_opmode == ATH9K_M_HOSTAP || |
| sc->sc_ah->ah_opmode == ATH9K_M_IBSS) { |
| ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq); |
| ath_beacon_return(sc, avp); |
| } |
| |
| /* Set interrupt mask */ |
| sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS); |
| ath9k_hw_set_interrupts(sc->sc_ah, sc->sc_imask & ~ATH9K_INT_GLOBAL); |
| sc->sc_flags &= ~SC_OP_BEACONS; |
| |
| error = ath_vap_detach(sc, 0); |
| if (error) |
| DPRINTF(sc, ATH_DBG_FATAL, |
| "%s: Unable to detach vap, error: %d\n", |
| __func__, error); |
| } |
| |
| static int ath9k_config(struct ieee80211_hw *hw, |
| struct ieee80211_conf *conf) |
| { |
| struct ath_softc *sc = hw->priv; |
| struct ieee80211_channel *curchan = hw->conf.channel; |
| int pos; |
| |
| DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n", |
| __func__, |
| curchan->center_freq); |
| |
| pos = ath_get_channel(sc, curchan); |
| if (pos == -1) { |
| DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid channel\n", __func__); |
| return -EINVAL; |
| } |
| |
| sc->sc_ah->ah_channels[pos].chanmode = |
| (curchan->band == IEEE80211_BAND_2GHZ) ? |
| CHANNEL_G : CHANNEL_A; |
| |
| if (sc->sc_curaid && hw->conf.ht_conf.ht_supported) |
| sc->sc_ah->ah_channels[pos].chanmode = |
| ath_get_extchanmode(sc, curchan); |
| |
| sc->sc_config.txpowlimit = 2 * conf->power_level; |
| |
| /* set h/w channel */ |
| if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0) |
| DPRINTF(sc, ATH_DBG_FATAL, "%s: Unable to set channel\n", |
| __func__); |
| |
| return 0; |
| } |
| |
| static int ath9k_config_interface(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct ieee80211_if_conf *conf) |
| { |
| struct ath_softc *sc = hw->priv; |
| struct ath_vap *avp; |
| u32 rfilt = 0; |
| int error, i; |
| DECLARE_MAC_BUF(mac); |
| |
| avp = sc->sc_vaps[0]; |
| if (avp == NULL) { |
| DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n", |
| __func__); |
| return -EINVAL; |
| } |
| |
| if ((conf->changed & IEEE80211_IFCC_BSSID) && |
| !is_zero_ether_addr(conf->bssid)) { |
| switch (vif->type) { |
| case IEEE80211_IF_TYPE_STA: |
| case IEEE80211_IF_TYPE_IBSS: |
| /* Update ratectrl about the new state */ |
| ath_rate_newstate(sc, avp); |
| |
| /* Set BSSID */ |
| memcpy(sc->sc_curbssid, conf->bssid, ETH_ALEN); |
| sc->sc_curaid = 0; |
| ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid, |
| sc->sc_curaid); |
| |
| /* Set aggregation protection mode parameters */ |
| sc->sc_config.ath_aggr_prot = 0; |
| |
| /* |
| * Reset our TSF so that its value is lower than the |
| * beacon that we are trying to catch. |
| * Only then hw will update its TSF register with the |
| * new beacon. Reset the TSF before setting the BSSID |
| * to avoid allowing in any frames that would update |
| * our TSF only to have us clear it |
| * immediately thereafter. |
| */ |
| ath9k_hw_reset_tsf(sc->sc_ah); |
| |
| /* Disable BMISS interrupt when we're not associated */ |
| ath9k_hw_set_interrupts(sc->sc_ah, |
| sc->sc_imask & |
| ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS)); |
| sc->sc_imask &= ~(ATH9K_INT_SWBA | ATH9K_INT_BMISS); |
| |
| DPRINTF(sc, ATH_DBG_CONFIG, |
| "%s: RX filter 0x%x bssid %s aid 0x%x\n", |
| __func__, rfilt, |
| print_mac(mac, sc->sc_curbssid), sc->sc_curaid); |
| |
| /* need to reconfigure the beacon */ |
| sc->sc_flags &= ~SC_OP_BEACONS ; |
| |
| break; |
| default: |
| break; |
| } |
| } |
| |
| if ((conf->changed & IEEE80211_IFCC_BEACON) && |
| (vif->type == IEEE80211_IF_TYPE_IBSS)) { |
| /* |
| * Allocate and setup the beacon frame. |
| * |
| * Stop any previous beacon DMA. This may be |
| * necessary, for example, when an ibss merge |
| * causes reconfiguration; we may be called |
| * with beacon transmission active. |
| */ |
| ath9k_hw_stoptxdma(sc->sc_ah, sc->sc_bhalq); |
| |
| error = ath_beacon_alloc(sc, 0); |
| if (error != 0) |
| return error; |
| |
| ath_beacon_sync(sc, 0); |
| } |
| |
| /* Check for WLAN_CAPABILITY_PRIVACY ? */ |
| if ((avp->av_opmode != IEEE80211_IF_TYPE_STA)) { |
| for (i = 0; i < IEEE80211_WEP_NKID; i++) |
| if (ath9k_hw_keyisvalid(sc->sc_ah, (u16)i)) |
| ath9k_hw_keysetmac(sc->sc_ah, |
| (u16)i, |
| sc->sc_curbssid); |
| } |
| |
| /* Only legacy IBSS for now */ |
| if (vif->type == IEEE80211_IF_TYPE_IBSS) |
| ath_update_chainmask(sc, 0); |
| |
| return 0; |
| } |
| |
| #define SUPPORTED_FILTERS \ |
| (FIF_PROMISC_IN_BSS | \ |
| FIF_ALLMULTI | \ |
| FIF_CONTROL | \ |
| FIF_OTHER_BSS | \ |
| FIF_BCN_PRBRESP_PROMISC | \ |
| FIF_FCSFAIL) |
| |
| /* FIXME: sc->sc_full_reset ? */ |
| static void ath9k_configure_filter(struct ieee80211_hw *hw, |
| unsigned int changed_flags, |
| unsigned int *total_flags, |
| int mc_count, |
| struct dev_mc_list *mclist) |
| { |
| struct ath_softc *sc = hw->priv; |
| u32 rfilt; |
| |
| changed_flags &= SUPPORTED_FILTERS; |
| *total_flags &= SUPPORTED_FILTERS; |
| |
| sc->rx_filter = *total_flags; |
| rfilt = ath_calcrxfilter(sc); |
| ath9k_hw_setrxfilter(sc->sc_ah, rfilt); |
| |
| if (changed_flags & FIF_BCN_PRBRESP_PROMISC) { |
| if (*total_flags & FIF_BCN_PRBRESP_PROMISC) |
| ath9k_hw_write_associd(sc->sc_ah, ath_bcast_mac, 0); |
| } |
| |
| DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set HW RX filter: 0x%x\n", |
| __func__, sc->rx_filter); |
| } |
| |
| static void ath9k_sta_notify(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| enum sta_notify_cmd cmd, |
| const u8 *addr) |
| { |
| struct ath_softc *sc = hw->priv; |
| struct ath_node *an; |
| unsigned long flags; |
| DECLARE_MAC_BUF(mac); |
| |
| spin_lock_irqsave(&sc->node_lock, flags); |
| an = ath_node_find(sc, (u8 *) addr); |
| spin_unlock_irqrestore(&sc->node_lock, flags); |
| |
| switch (cmd) { |
| case STA_NOTIFY_ADD: |
| spin_lock_irqsave(&sc->node_lock, flags); |
| if (!an) { |
| ath_node_attach(sc, (u8 *)addr, 0); |
| DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach a node: %s\n", |
| __func__, |
| print_mac(mac, addr)); |
| } else { |
| ath_node_get(sc, (u8 *)addr); |
| } |
| spin_unlock_irqrestore(&sc->node_lock, flags); |
| break; |
| case STA_NOTIFY_REMOVE: |
| if (!an) |
| DPRINTF(sc, ATH_DBG_FATAL, |
| "%s: Removal of a non-existent node\n", |
| __func__); |
| else { |
| ath_node_put(sc, an, ATH9K_BH_STATUS_INTACT); |
| DPRINTF(sc, ATH_DBG_CONFIG, "%s: Put a node: %s\n", |
| __func__, |
| print_mac(mac, addr)); |
| } |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static int ath9k_conf_tx(struct ieee80211_hw *hw, |
| u16 queue, |
| const struct ieee80211_tx_queue_params *params) |
| { |
| struct ath_softc *sc = hw->priv; |
| struct ath9k_tx_queue_info qi; |
| int ret = 0, qnum; |
| |
| if (queue >= WME_NUM_AC) |
| return 0; |
| |
| qi.tqi_aifs = params->aifs; |
| qi.tqi_cwmin = params->cw_min; |
| qi.tqi_cwmax = params->cw_max; |
| qi.tqi_burstTime = params->txop; |
| qnum = ath_get_hal_qnum(queue, sc); |
| |
| DPRINTF(sc, ATH_DBG_CONFIG, |
| "%s: Configure tx [queue/halq] [%d/%d], " |
| "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n", |
| __func__, |
| queue, |
| qnum, |
| params->aifs, |
| params->cw_min, |
| params->cw_max, |
| params->txop); |
| |
| ret = ath_txq_update(sc, qnum, &qi); |
| if (ret) |
| DPRINTF(sc, ATH_DBG_FATAL, |
| "%s: TXQ Update failed\n", __func__); |
| |
| return ret; |
| } |
| |
| static int ath9k_set_key(struct ieee80211_hw *hw, |
| enum set_key_cmd cmd, |
| const u8 *local_addr, |
| const u8 *addr, |
| struct ieee80211_key_conf *key) |
| { |
| struct ath_softc *sc = hw->priv; |
| int ret = 0; |
| |
| DPRINTF(sc, ATH_DBG_KEYCACHE, " %s: Set HW Key\n", __func__); |
| |
| switch (cmd) { |
| case SET_KEY: |
| ret = ath_key_config(sc, addr, key); |
| if (!ret) { |
| set_bit(key->keyidx, sc->sc_keymap); |
| key->hw_key_idx = key->keyidx; |
| /* push IV and Michael MIC generation to stack */ |
| key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; |
| key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; |
| } |
| break; |
| case DISABLE_KEY: |
| ath_key_delete(sc, key); |
| clear_bit(key->keyidx, sc->sc_keymap); |
| sc->sc_keytype = ATH9K_CIPHER_CLR; |
| break; |
| default: |
| ret = -EINVAL; |
| } |
| |
| return ret; |
| } |
| |
| static void ath9k_ht_conf(struct ath_softc *sc, |
| struct ieee80211_bss_conf *bss_conf) |
| { |
| #define IEEE80211_HT_CAP_40MHZ_INTOLERANT BIT(14) |
| struct ath_ht_info *ht_info = &sc->sc_ht_info; |
| |
| if (bss_conf->assoc_ht) { |
| ht_info->ext_chan_offset = |
| bss_conf->ht_bss_conf->bss_cap & |
| IEEE80211_HT_IE_CHA_SEC_OFFSET; |
| |
| if (!(bss_conf->ht_conf->cap & |
| IEEE80211_HT_CAP_40MHZ_INTOLERANT) && |
| (bss_conf->ht_bss_conf->bss_cap & |
| IEEE80211_HT_IE_CHA_WIDTH)) |
| ht_info->tx_chan_width = ATH9K_HT_MACMODE_2040; |
| else |
| ht_info->tx_chan_width = ATH9K_HT_MACMODE_20; |
| |
| ath9k_hw_set11nmac2040(sc->sc_ah, ht_info->tx_chan_width); |
| ht_info->maxampdu = 1 << (IEEE80211_HTCAP_MAXRXAMPDU_FACTOR + |
| bss_conf->ht_conf->ampdu_factor); |
| ht_info->mpdudensity = |
| parse_mpdudensity(bss_conf->ht_conf->ampdu_density); |
| |
| } |
| |
| #undef IEEE80211_HT_CAP_40MHZ_INTOLERANT |
| } |
| |
| static void ath9k_bss_assoc_info(struct ath_softc *sc, |
| struct ieee80211_bss_conf *bss_conf) |
| { |
| struct ieee80211_hw *hw = sc->hw; |
| struct ieee80211_channel *curchan = hw->conf.channel; |
| struct ath_vap *avp; |
| int pos; |
| DECLARE_MAC_BUF(mac); |
| |
| if (bss_conf->assoc) { |
| DPRINTF(sc, ATH_DBG_CONFIG, "%s: Bss Info ASSOC %d\n", |
| __func__, |
| bss_conf->aid); |
| |
| avp = sc->sc_vaps[0]; |
| if (avp == NULL) { |
| DPRINTF(sc, ATH_DBG_FATAL, "%s: Invalid interface\n", |
| __func__); |
| return; |
| } |
| |
| /* New association, store aid */ |
| if (avp->av_opmode == ATH9K_M_STA) { |
| sc->sc_curaid = bss_conf->aid; |
| ath9k_hw_write_associd(sc->sc_ah, sc->sc_curbssid, |
| sc->sc_curaid); |
| } |
| |
| /* Configure the beacon */ |
| ath_beacon_config(sc, 0); |
| sc->sc_flags |= SC_OP_BEACONS; |
| |
| /* Reset rssi stats */ |
| sc->sc_halstats.ns_avgbrssi = ATH_RSSI_DUMMY_MARKER; |
| sc->sc_halstats.ns_avgrssi = ATH_RSSI_DUMMY_MARKER; |
| sc->sc_halstats.ns_avgtxrssi = ATH_RSSI_DUMMY_MARKER; |
| sc->sc_halstats.ns_avgtxrate = ATH_RATE_DUMMY_MARKER; |
| |
| /* Update chainmask */ |
| ath_update_chainmask(sc, bss_conf->assoc_ht); |
| |
| DPRINTF(sc, ATH_DBG_CONFIG, |
| "%s: bssid %s aid 0x%x\n", |
| __func__, |
| print_mac(mac, sc->sc_curbssid), sc->sc_curaid); |
| |
| DPRINTF(sc, ATH_DBG_CONFIG, "%s: Set channel: %d MHz\n", |
| __func__, |
| curchan->center_freq); |
| |
| pos = ath_get_channel(sc, curchan); |
| if (pos == -1) { |
| DPRINTF(sc, ATH_DBG_FATAL, |
| "%s: Invalid channel\n", __func__); |
| return; |
| } |
| |
| if (hw->conf.ht_conf.ht_supported) |
| sc->sc_ah->ah_channels[pos].chanmode = |
| ath_get_extchanmode(sc, curchan); |
| else |
| sc->sc_ah->ah_channels[pos].chanmode = |
| (curchan->band == IEEE80211_BAND_2GHZ) ? |
| CHANNEL_G : CHANNEL_A; |
| |
| /* set h/w channel */ |
| if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0) |
| DPRINTF(sc, ATH_DBG_FATAL, |
| "%s: Unable to set channel\n", |
| __func__); |
| |
| ath_rate_newstate(sc, avp); |
| /* Update ratectrl about the new state */ |
| ath_rc_node_update(hw, avp->rc_node); |
| } else { |
| DPRINTF(sc, ATH_DBG_CONFIG, |
| "%s: Bss Info DISSOC\n", __func__); |
| sc->sc_curaid = 0; |
| } |
| } |
| |
| static void ath9k_bss_info_changed(struct ieee80211_hw *hw, |
| struct ieee80211_vif *vif, |
| struct ieee80211_bss_conf *bss_conf, |
| u32 changed) |
| { |
| struct ath_softc *sc = hw->priv; |
| |
| if (changed & BSS_CHANGED_ERP_PREAMBLE) { |
| DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed PREAMBLE %d\n", |
| __func__, |
| bss_conf->use_short_preamble); |
| if (bss_conf->use_short_preamble) |
| sc->sc_flags |= SC_OP_PREAMBLE_SHORT; |
| else |
| sc->sc_flags &= ~SC_OP_PREAMBLE_SHORT; |
| } |
| |
| if (changed & BSS_CHANGED_ERP_CTS_PROT) { |
| DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed CTS PROT %d\n", |
| __func__, |
| bss_conf->use_cts_prot); |
| if (bss_conf->use_cts_prot && |
| hw->conf.channel->band != IEEE80211_BAND_5GHZ) |
| sc->sc_flags |= SC_OP_PROTECT_ENABLE; |
| else |
| sc->sc_flags &= ~SC_OP_PROTECT_ENABLE; |
| } |
| |
| if (changed & BSS_CHANGED_HT) { |
| DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed HT %d\n", |
| __func__, |
| bss_conf->assoc_ht); |
| ath9k_ht_conf(sc, bss_conf); |
| } |
| |
| if (changed & BSS_CHANGED_ASSOC) { |
| DPRINTF(sc, ATH_DBG_CONFIG, "%s: BSS Changed ASSOC %d\n", |
| __func__, |
| bss_conf->assoc); |
| ath9k_bss_assoc_info(sc, bss_conf); |
| } |
| } |
| |
| static u64 ath9k_get_tsf(struct ieee80211_hw *hw) |
| { |
| u64 tsf; |
| struct ath_softc *sc = hw->priv; |
| struct ath_hal *ah = sc->sc_ah; |
| |
| tsf = ath9k_hw_gettsf64(ah); |
| |
| return tsf; |
| } |
| |
| static void ath9k_reset_tsf(struct ieee80211_hw *hw) |
| { |
| struct ath_softc *sc = hw->priv; |
| struct ath_hal *ah = sc->sc_ah; |
| |
| ath9k_hw_reset_tsf(ah); |
| } |
| |
| static int ath9k_ampdu_action(struct ieee80211_hw *hw, |
| enum ieee80211_ampdu_mlme_action action, |
| const u8 *addr, |
| u16 tid, |
| u16 *ssn) |
| { |
| struct ath_softc *sc = hw->priv; |
| int ret = 0; |
| |
| switch (action) { |
| case IEEE80211_AMPDU_RX_START: |
| ret = ath_rx_aggr_start(sc, addr, tid, ssn); |
| if (ret < 0) |
| DPRINTF(sc, ATH_DBG_FATAL, |
| "%s: Unable to start RX aggregation\n", |
| __func__); |
| break; |
| case IEEE80211_AMPDU_RX_STOP: |
| ret = ath_rx_aggr_stop(sc, addr, tid); |
| if (ret < 0) |
| DPRINTF(sc, ATH_DBG_FATAL, |
| "%s: Unable to stop RX aggregation\n", |
| __func__); |
| break; |
| case IEEE80211_AMPDU_TX_START: |
| ret = ath_tx_aggr_start(sc, addr, tid, ssn); |
| if (ret < 0) |
| DPRINTF(sc, ATH_DBG_FATAL, |
| "%s: Unable to start TX aggregation\n", |
| __func__); |
| else |
| ieee80211_start_tx_ba_cb_irqsafe(hw, (u8 *)addr, tid); |
| break; |
| case IEEE80211_AMPDU_TX_STOP: |
| ret = ath_tx_aggr_stop(sc, addr, tid); |
| if (ret < 0) |
| DPRINTF(sc, ATH_DBG_FATAL, |
| "%s: Unable to stop TX aggregation\n", |
| __func__); |
| |
| ieee80211_stop_tx_ba_cb_irqsafe(hw, (u8 *)addr, tid); |
| break; |
| default: |
| DPRINTF(sc, ATH_DBG_FATAL, |
| "%s: Unknown AMPDU action\n", __func__); |
| } |
| |
| return ret; |
| } |
| |
| static struct ieee80211_ops ath9k_ops = { |
| .tx = ath9k_tx, |
| .start = ath9k_start, |
| .stop = ath9k_stop, |
| .add_interface = ath9k_add_interface, |
| .remove_interface = ath9k_remove_interface, |
| .config = ath9k_config, |
| .config_interface = ath9k_config_interface, |
| .configure_filter = ath9k_configure_filter, |
| .get_stats = NULL, |
| .sta_notify = ath9k_sta_notify, |
| .conf_tx = ath9k_conf_tx, |
| .get_tx_stats = NULL, |
| .bss_info_changed = ath9k_bss_info_changed, |
| .set_tim = NULL, |
| .set_key = ath9k_set_key, |
| .hw_scan = NULL, |
| .get_tkip_seq = NULL, |
| .set_rts_threshold = NULL, |
| .set_frag_threshold = NULL, |
| .set_retry_limit = NULL, |
| .get_tsf = ath9k_get_tsf, |
| .reset_tsf = ath9k_reset_tsf, |
| .tx_last_beacon = NULL, |
| .ampdu_action = ath9k_ampdu_action |
| }; |
| |
| void ath_get_beaconconfig(struct ath_softc *sc, |
| int if_id, |
| struct ath_beacon_config *conf) |
| { |
| struct ieee80211_hw *hw = sc->hw; |
| |
| /* fill in beacon config data */ |
| |
| conf->beacon_interval = hw->conf.beacon_int; |
| conf->listen_interval = 100; |
| conf->dtim_count = 1; |
| conf->bmiss_timeout = ATH_DEFAULT_BMISS_LIMIT * conf->listen_interval; |
| } |
| |
| int ath_update_beacon(struct ath_softc *sc, |
| int if_id, |
| struct ath_beacon_offset *bo, |
| struct sk_buff *skb, |
| int mcast) |
| { |
| return 0; |
| } |
| |
| void ath_tx_complete(struct ath_softc *sc, struct sk_buff *skb, |
| struct ath_xmit_status *tx_status, struct ath_node *an) |
| { |
| struct ieee80211_hw *hw = sc->hw; |
| struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb); |
| |
| DPRINTF(sc, ATH_DBG_XMIT, |
| "%s: TX complete: skb: %p\n", __func__, skb); |
| |
| if (tx_info->flags & IEEE80211_TX_CTL_NO_ACK || |
| tx_info->flags & IEEE80211_TX_STAT_TX_FILTERED) { |
| /* free driver's private data area of tx_info */ |
| if (tx_info->driver_data[0] != NULL) |
| kfree(tx_info->driver_data[0]); |
| tx_info->driver_data[0] = NULL; |
| } |
| |
| if (tx_status->flags & ATH_TX_BAR) { |
| tx_info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; |
| tx_status->flags &= ~ATH_TX_BAR; |
| } |
| if (tx_status->flags) |
| tx_info->status.excessive_retries = 1; |
| |
| tx_info->status.retry_count = tx_status->retries; |
| |
| ieee80211_tx_status(hw, skb); |
| if (an) |
| ath_node_put(sc, an, ATH9K_BH_STATUS_CHANGE); |
| } |
| |
| int ath__rx_indicate(struct ath_softc *sc, |
| struct sk_buff *skb, |
| struct ath_recv_status *status, |
| u16 keyix) |
| { |
| struct ieee80211_hw *hw = sc->hw; |
| struct ath_node *an = NULL; |
| struct ieee80211_rx_status rx_status; |
| struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
| int hdrlen = ieee80211_get_hdrlen_from_skb(skb); |
| int padsize; |
| enum ATH_RX_TYPE st; |
| |
| /* see if any padding is done by the hw and remove it */ |
| if (hdrlen & 3) { |
| padsize = hdrlen % 4; |
| memmove(skb->data + padsize, skb->data, hdrlen); |
| skb_pull(skb, padsize); |
| } |
| |
| /* remove FCS before passing up to protocol stack */ |
| skb_trim(skb, (skb->len - FCS_LEN)); |
| |
| /* Prepare rx status */ |
| ath9k_rx_prepare(sc, skb, status, &rx_status); |
| |
| if (!(keyix == ATH9K_RXKEYIX_INVALID) && |
| !(status->flags & ATH_RX_DECRYPT_ERROR)) { |
| rx_status.flag |= RX_FLAG_DECRYPTED; |
| } else if ((le16_to_cpu(hdr->frame_control) & IEEE80211_FCTL_PROTECTED) |
| && !(status->flags & ATH_RX_DECRYPT_ERROR) |
| && skb->len >= hdrlen + 4) { |
| keyix = skb->data[hdrlen + 3] >> 6; |
| |
| if (test_bit(keyix, sc->sc_keymap)) |
| rx_status.flag |= RX_FLAG_DECRYPTED; |
| } |
| |
| spin_lock_bh(&sc->node_lock); |
| an = ath_node_find(sc, hdr->addr2); |
| spin_unlock_bh(&sc->node_lock); |
| |
| if (an) { |
| ath_rx_input(sc, an, |
| hw->conf.ht_conf.ht_supported, |
| skb, status, &st); |
| } |
| if (!an || (st != ATH_RX_CONSUMED)) |
| __ieee80211_rx(hw, skb, &rx_status); |
| |
| return 0; |
| } |
| |
| int ath_rx_subframe(struct ath_node *an, |
| struct sk_buff *skb, |
| struct ath_recv_status *status) |
| { |
| struct ath_softc *sc = an->an_sc; |
| struct ieee80211_hw *hw = sc->hw; |
| struct ieee80211_rx_status rx_status; |
| |
| /* Prepare rx status */ |
| ath9k_rx_prepare(sc, skb, status, &rx_status); |
| if (!(status->flags & ATH_RX_DECRYPT_ERROR)) |
| rx_status.flag |= RX_FLAG_DECRYPTED; |
| |
| __ieee80211_rx(hw, skb, &rx_status); |
| |
| return 0; |
| } |
| |
| enum ath9k_ht_macmode ath_cwm_macmode(struct ath_softc *sc) |
| { |
| return sc->sc_ht_info.tx_chan_width; |
| } |
| |
| static int ath_detach(struct ath_softc *sc) |
| { |
| struct ieee80211_hw *hw = sc->hw; |
| |
| DPRINTF(sc, ATH_DBG_CONFIG, "%s: Detach ATH hw\n", __func__); |
| |
| /* Unregister hw */ |
| |
| ieee80211_unregister_hw(hw); |
| |
| /* unregister Rate control */ |
| ath_rate_control_unregister(); |
| |
| /* tx/rx cleanup */ |
| |
| ath_rx_cleanup(sc); |
| ath_tx_cleanup(sc); |
| |
| /* Deinit */ |
| |
| ath_deinit(sc); |
| |
| return 0; |
| } |
| |
| static int ath_attach(u16 devid, |
| struct ath_softc *sc) |
| { |
| struct ieee80211_hw *hw = sc->hw; |
| int error = 0; |
| |
| DPRINTF(sc, ATH_DBG_CONFIG, "%s: Attach ATH hw\n", __func__); |
| |
| error = ath_init(devid, sc); |
| if (error != 0) |
| return error; |
| |
| /* Init nodes */ |
| |
| INIT_LIST_HEAD(&sc->node_list); |
| spin_lock_init(&sc->node_lock); |
| |
| /* get mac address from hardware and set in mac80211 */ |
| |
| SET_IEEE80211_PERM_ADDR(hw, sc->sc_myaddr); |
| |
| /* setup channels and rates */ |
| |
| sc->sbands[IEEE80211_BAND_2GHZ].channels = |
| sc->channels[IEEE80211_BAND_2GHZ]; |
| sc->sbands[IEEE80211_BAND_2GHZ].bitrates = |
| sc->rates[IEEE80211_BAND_2GHZ]; |
| sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ; |
| |
| if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT) |
| /* Setup HT capabilities for 2.4Ghz*/ |
| setup_ht_cap(&sc->sbands[IEEE80211_BAND_2GHZ].ht_info); |
| |
| hw->wiphy->bands[IEEE80211_BAND_2GHZ] = |
| &sc->sbands[IEEE80211_BAND_2GHZ]; |
| |
| if (test_bit(ATH9K_MODE_11A, sc->sc_ah->ah_caps.wireless_modes)) { |
| sc->sbands[IEEE80211_BAND_5GHZ].channels = |
| sc->channels[IEEE80211_BAND_5GHZ]; |
| sc->sbands[IEEE80211_BAND_5GHZ].bitrates = |
| sc->rates[IEEE80211_BAND_5GHZ]; |
| sc->sbands[IEEE80211_BAND_5GHZ].band = |
| IEEE80211_BAND_5GHZ; |
| |
| if (sc->sc_ah->ah_caps.hw_caps & ATH9K_HW_CAP_HT) |
| /* Setup HT capabilities for 5Ghz*/ |
| setup_ht_cap(&sc->sbands[IEEE80211_BAND_5GHZ].ht_info); |
| |
| hw->wiphy->bands[IEEE80211_BAND_5GHZ] = |
| &sc->sbands[IEEE80211_BAND_5GHZ]; |
| } |
| |
| /* FIXME: Have to figure out proper hw init values later */ |
| |
| hw->queues = 4; |
| hw->ampdu_queues = 1; |
| |
| /* Register rate control */ |
| hw->rate_control_algorithm = "ath9k_rate_control"; |
| error = ath_rate_control_register(); |
| if (error != 0) { |
| DPRINTF(sc, ATH_DBG_FATAL, |
| "%s: Unable to register rate control " |
| "algorithm:%d\n", __func__, error); |
| ath_rate_control_unregister(); |
| goto bad; |
| } |
| |
| error = ieee80211_register_hw(hw); |
| if (error != 0) { |
| ath_rate_control_unregister(); |
| goto bad; |
| } |
| |
| /* initialize tx/rx engine */ |
| |
| error = ath_tx_init(sc, ATH_TXBUF); |
| if (error != 0) |
| goto bad1; |
| |
| error = ath_rx_init(sc, ATH_RXBUF); |
| if (error != 0) |
| goto bad1; |
| |
| return 0; |
| bad1: |
| ath_detach(sc); |
| bad: |
| return error; |
| } |
| |
| static int ath_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
| { |
| void __iomem *mem; |
| struct ath_softc *sc; |
| struct ieee80211_hw *hw; |
| const char *athname; |
| u8 csz; |
| u32 val; |
| int ret = 0; |
| |
| if (pci_enable_device(pdev)) |
| return -EIO; |
| |
| /* XXX 32-bit addressing only */ |
| if (pci_set_dma_mask(pdev, 0xffffffff)) { |
| printk(KERN_ERR "ath_pci: 32-bit DMA not available\n"); |
| ret = -ENODEV; |
| goto bad; |
| } |
| |
| /* |
| * Cache line size is used to size and align various |
| * structures used to communicate with the hardware. |
| */ |
| pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz); |
| if (csz == 0) { |
| /* |
| * Linux 2.4.18 (at least) writes the cache line size |
| * register as a 16-bit wide register which is wrong. |
| * We must have this setup properly for rx buffer |
| * DMA to work so force a reasonable value here if it |
| * comes up zero. |
| */ |
| csz = L1_CACHE_BYTES / sizeof(u32); |
| pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz); |
| } |
| /* |
| * The default setting of latency timer yields poor results, |
| * set it to the value used by other systems. It may be worth |
| * tweaking this setting more. |
| */ |
| pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8); |
| |
| pci_set_master(pdev); |
| |
| /* |
| * Disable the RETRY_TIMEOUT register (0x41) to keep |
| * PCI Tx retries from interfering with C3 CPU state. |
| */ |
| pci_read_config_dword(pdev, 0x40, &val); |
| if ((val & 0x0000ff00) != 0) |
| pci_write_config_dword(pdev, 0x40, val & 0xffff00ff); |
| |
| ret = pci_request_region(pdev, 0, "ath9k"); |
| if (ret) { |
| dev_err(&pdev->dev, "PCI memory region reserve error\n"); |
| ret = -ENODEV; |
| goto bad; |
| } |
| |
| mem = pci_iomap(pdev, 0, 0); |
| if (!mem) { |
| printk(KERN_ERR "PCI memory map error\n") ; |
| ret = -EIO; |
| goto bad1; |
| } |
| |
| hw = ieee80211_alloc_hw(sizeof(struct ath_softc), &ath9k_ops); |
| if (hw == NULL) { |
| printk(KERN_ERR "ath_pci: no memory for ieee80211_hw\n"); |
| goto bad2; |
| } |
| |
| hw->flags = IEEE80211_HW_SIGNAL_DBM | |
| IEEE80211_HW_NOISE_DBM; |
| |
| SET_IEEE80211_DEV(hw, &pdev->dev); |
| pci_set_drvdata(pdev, hw); |
| |
| sc = hw->priv; |
| sc->hw = hw; |
| sc->pdev = pdev; |
| sc->mem = mem; |
| |
| if (ath_attach(id->device, sc) != 0) { |
| ret = -ENODEV; |
| goto bad3; |
| } |
| |
| /* setup interrupt service routine */ |
| |
| if (request_irq(pdev->irq, ath_isr, IRQF_SHARED, "ath", sc)) { |
| printk(KERN_ERR "%s: request_irq failed\n", |
| wiphy_name(hw->wiphy)); |
| ret = -EIO; |
| goto bad4; |
| } |
| |
| athname = ath9k_hw_probe(id->vendor, id->device); |
| |
| printk(KERN_INFO "%s: %s: mem=0x%lx, irq=%d\n", |
| wiphy_name(hw->wiphy), |
| athname ? athname : "Atheros ???", |
| (unsigned long)mem, pdev->irq); |
| |
| return 0; |
| bad4: |
| ath_detach(sc); |
| bad3: |
| ieee80211_free_hw(hw); |
| bad2: |
| pci_iounmap(pdev, mem); |
| bad1: |
| pci_release_region(pdev, 0); |
| bad: |
| pci_disable_device(pdev); |
| return ret; |
| } |
| |
| static void ath_pci_remove(struct pci_dev *pdev) |
| { |
| struct ieee80211_hw *hw = pci_get_drvdata(pdev); |
| struct ath_softc *sc = hw->priv; |
| |
| if (pdev->irq) |
| free_irq(pdev->irq, sc); |
| ath_detach(sc); |
| pci_iounmap(pdev, sc->mem); |
| pci_release_region(pdev, 0); |
| pci_disable_device(pdev); |
| ieee80211_free_hw(hw); |
| } |
| |
| #ifdef CONFIG_PM |
| |
| static int ath_pci_suspend(struct pci_dev *pdev, pm_message_t state) |
| { |
| pci_save_state(pdev); |
| pci_disable_device(pdev); |
| pci_set_power_state(pdev, 3); |
| |
| return 0; |
| } |
| |
| static int ath_pci_resume(struct pci_dev *pdev) |
| { |
| u32 val; |
| int err; |
| |
| err = pci_enable_device(pdev); |
| if (err) |
| return err; |
| pci_restore_state(pdev); |
| /* |
| * Suspend/Resume resets the PCI configuration space, so we have to |
| * re-disable the RETRY_TIMEOUT register (0x41) to keep |
| * PCI Tx retries from interfering with C3 CPU state |
| */ |
| pci_read_config_dword(pdev, 0x40, &val); |
| if ((val & 0x0000ff00) != 0) |
| pci_write_config_dword(pdev, 0x40, val & 0xffff00ff); |
| |
| return 0; |
| } |
| |
| #endif /* CONFIG_PM */ |
| |
| MODULE_DEVICE_TABLE(pci, ath_pci_id_table); |
| |
| static struct pci_driver ath_pci_driver = { |
| .name = "ath9k", |
| .id_table = ath_pci_id_table, |
| .probe = ath_pci_probe, |
| .remove = ath_pci_remove, |
| #ifdef CONFIG_PM |
| .suspend = ath_pci_suspend, |
| .resume = ath_pci_resume, |
| #endif /* CONFIG_PM */ |
| }; |
| |
| static int __init init_ath_pci(void) |
| { |
| printk(KERN_INFO "%s: %s\n", dev_info, ATH_PCI_VERSION); |
| |
| if (pci_register_driver(&ath_pci_driver) < 0) { |
| printk(KERN_ERR |
| "ath_pci: No devices found, driver not installed.\n"); |
| pci_unregister_driver(&ath_pci_driver); |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| module_init(init_ath_pci); |
| |
| static void __exit exit_ath_pci(void) |
| { |
| pci_unregister_driver(&ath_pci_driver); |
| printk(KERN_INFO "%s: driver unloaded\n", dev_info); |
| } |
| module_exit(exit_ath_pci); |