Commit c7de35cd authored by Ron Rindjunsky's avatar Ron Rindjunsky Committed by John W. Linville
Browse files

iwlwifi: unify init driver flow



This patch does the following:
1 - moving init_drv from handler to regular function call
2 - move the init driver flow from iwl4965 to iwlcore, thus unify it to all
iwl family as a single flow
3 - move some general purpose functions from iwl4965 to iwlcore
Signed-off-by: default avatarRon Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: default avatarTomas Winkler <tomas.winkler@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 038669e4
......@@ -55,44 +55,6 @@ static struct iwl_mod_params iwl4965_mod_params = {
static void iwl4965_hw_card_show_info(struct iwl_priv *priv);
#define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
[IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
IWL_RATE_SISO_##s##M_PLCP, \
IWL_RATE_MIMO2_##s##M_PLCP,\
IWL_RATE_MIMO3_##s##M_PLCP,\
IWL_RATE_##r##M_IEEE, \
IWL_RATE_##ip##M_INDEX, \
IWL_RATE_##in##M_INDEX, \
IWL_RATE_##rp##M_INDEX, \
IWL_RATE_##rn##M_INDEX, \
IWL_RATE_##pp##M_INDEX, \
IWL_RATE_##np##M_INDEX }
/*
* Parameter order:
* rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
*
* If there isn't a valid next or previous rate then INV is used which
* maps to IWL_RATE_INVALID
*
*/
const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT] = {
IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */
IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */
IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */
IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */
IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */
IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */
IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */
IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */
IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */
IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */
IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */
IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
/* FIXME:RS: ^^ should be INV (legacy) */
};
#ifdef CONFIG_IWL4965_HT
static const u16 default_tid_to_tx_fifo[] = {
......@@ -262,108 +224,12 @@ static int iwl4965_load_bsm(struct iwl_priv *priv)
return 0;
}
static int iwl4965_init_drv(struct iwl_priv *priv)
{
int ret;
int i;
priv->retry_rate = 1;
priv->ibss_beacon = NULL;
spin_lock_init(&priv->lock);
spin_lock_init(&priv->power_data.lock);
spin_lock_init(&priv->sta_lock);
spin_lock_init(&priv->hcmd_lock);
spin_lock_init(&priv->lq_mngr.lock);
for (i = 0; i < IWL_IBSS_MAC_HASH_SIZE; i++)
INIT_LIST_HEAD(&priv->ibss_mac_hash[i]);
INIT_LIST_HEAD(&priv->free_frames);
mutex_init(&priv->mutex);
/* Clear the driver's (not device's) station table */
iwlcore_clear_stations_table(priv);
priv->data_retry_limit = -1;
priv->ieee_channels = NULL;
priv->ieee_rates = NULL;
priv->band = IEEE80211_BAND_2GHZ;
priv->iw_mode = IEEE80211_IF_TYPE_STA;
priv->use_ant_b_for_management_frame = 1; /* start with ant B */
priv->ps_mode = IWL_MIMO_PS_NONE;
/* Choose which receivers/antennas to use */
iwl4965_set_rxon_chain(priv);
iwlcore_reset_qos(priv);
priv->qos_data.qos_active = 0;
priv->qos_data.qos_cap.val = 0;
iwlcore_set_rxon_channel(priv, IEEE80211_BAND_2GHZ, 6);
priv->rates_mask = IWL_RATES_MASK;
/* If power management is turned on, default to AC mode */
priv->power_mode = IWL_POWER_AC;
priv->user_txpower_limit = IWL_DEFAULT_TX_POWER;
ret = iwl_init_channel_map(priv);
if (ret) {
IWL_ERROR("initializing regulatory failed: %d\n", ret);
goto err;
}
ret = iwl4965_init_geos(priv);
if (ret) {
IWL_ERROR("initializing geos failed: %d\n", ret);
goto err_free_channel_map;
}
ret = ieee80211_register_hw(priv->hw);
if (ret) {
IWL_ERROR("Failed to register network device (error %d)\n",
ret);
goto err_free_geos;
}
priv->hw->conf.beacon_int = 100;
priv->mac80211_registered = 1;
return 0;
err_free_geos:
iwl4965_free_geos(priv);
err_free_channel_map:
iwl_free_channel_map(priv);
err:
return ret;
}
static int is_fat_channel(__le32 rxon_flags)
{
return (rxon_flags & RXON_FLG_CHANNEL_MODE_PURE_40_MSK) ||
(rxon_flags & RXON_FLG_CHANNEL_MODE_MIXED_MSK);
}
#ifdef CONFIG_IWL4965_HT
static u8 is_single_rx_stream(struct iwl_priv *priv)
{
return !priv->current_ht_config.is_ht ||
((priv->current_ht_config.supp_mcs_set[1] == 0) &&
(priv->current_ht_config.supp_mcs_set[2] == 0)) ||
priv->ps_mode == IWL_MIMO_PS_STATIC;
}
#else
static inline u8 is_single_rx_stream(struct iwl_priv *priv)
{
return 1;
}
#endif /*CONFIG_IWL4965_HT */
int iwl4965_hwrate_to_plcp_idx(u32 rate_n_flags)
{
int idx = 0;
......@@ -422,41 +288,6 @@ void iwl4965_hwrate_to_tx_control(struct iwl_priv *priv, u32 rate_n_flags,
&priv->bands[IEEE80211_BAND_2GHZ].bitrates[rate_index];
}
/*
* Determine how many receiver/antenna chains to use.
* More provides better reception via diversity. Fewer saves power.
* MIMO (dual stream) requires at least 2, but works better with 3.
* This does not determine *which* chains to use, just how many.
*/
static int iwl4965_get_rx_chain_counter(struct iwl_priv *priv,
u8 *idle_state, u8 *rx_state)
{
u8 is_single = is_single_rx_stream(priv);
u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
/* # of Rx chains to use when expecting MIMO. */
if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
*rx_state = 2;
else
*rx_state = 3;
/* # Rx chains when idling and maybe trying to save power */
switch (priv->ps_mode) {
case IWL_MIMO_PS_STATIC:
case IWL_MIMO_PS_DYNAMIC:
*idle_state = (is_cam) ? 2 : 1;
break;
case IWL_MIMO_PS_NONE:
*idle_state = (is_cam) ? *rx_state : 1;
break;
default:
*idle_state = 1;
break;
}
return 0;
}
int iwl4965_hw_rxq_stop(struct iwl_priv *priv)
{
int rc;
......@@ -2526,44 +2357,6 @@ static void iwl4965_txq_update_byte_cnt_tbl(struct iwl_priv *priv,
byte_cnt, len);
}
/**
* iwl4965_set_rxon_chain - Set up Rx chain usage in "staging" RXON image
*
* Selects how many and which Rx receivers/antennas/chains to use.
* This should not be used for scan command ... it puts data in wrong place.
*/
void iwl4965_set_rxon_chain(struct iwl_priv *priv)
{
u8 is_single = is_single_rx_stream(priv);
u8 idle_state, rx_state;
priv->staging_rxon.rx_chain = 0;
rx_state = idle_state = 3;
/* Tell uCode which antennas are actually connected.
* Before first association, we assume all antennas are connected.
* Just after first association, iwl_chain_noise_calibration()
* checks which antennas actually *are* connected. */
priv->staging_rxon.rx_chain |=
cpu_to_le16(priv->hw_params.valid_rx_ant <<
RXON_RX_CHAIN_VALID_POS);
/* How many receivers should we use? */
iwl4965_get_rx_chain_counter(priv, &idle_state, &rx_state);
priv->staging_rxon.rx_chain |=
cpu_to_le16(rx_state << RXON_RX_CHAIN_MIMO_CNT_POS);
priv->staging_rxon.rx_chain |=
cpu_to_le16(idle_state << RXON_RX_CHAIN_CNT_POS);
if (!is_single && (rx_state >= 2) &&
!test_bit(STATUS_POWER_PMI, &priv->status))
priv->staging_rxon.rx_chain |= RXON_RX_CHAIN_MIMO_FORCE_MSK;
else
priv->staging_rxon.rx_chain &= ~RXON_RX_CHAIN_MIMO_FORCE_MSK;
IWL_DEBUG_ASSOC("rx chain %X\n", priv->staging_rxon.rx_chain);
}
/**
* sign_extend - Sign extend a value using specified bit as sign-bit
*
......@@ -3127,41 +2920,6 @@ static int iwl4965_calc_rssi(struct iwl4965_rx_phy_res *rx_resp)
return (max_rssi - agc - IWL_RSSI_OFFSET);
}
#ifdef CONFIG_IWL4965_HT
void iwl4965_init_ht_hw_capab(const struct iwl_priv *priv,
struct ieee80211_ht_info *ht_info,
enum ieee80211_band band)
{
ht_info->cap = 0;
memset(ht_info->supp_mcs_set, 0, 16);
ht_info->ht_supported = 1;
if (priv->hw_params.fat_channel & BIT(band)) {
ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
ht_info->supp_mcs_set[4] = 0x01;
}
ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
(IWL_MIMO_PS_NONE << 2));
if (priv->cfg->mod_params->amsdu_size_8K)
ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
ht_info->supp_mcs_set[0] = 0xFF;
if (priv->hw_params.tx_chains_num >= 2)
ht_info->supp_mcs_set[1] = 0xFF;
if (priv->hw_params.tx_chains_num >= 3)
ht_info->supp_mcs_set[2] = 0xFF;
}
#endif /* CONFIG_IWL4965_HT */
static void iwl4965_sta_modify_ps_wake(struct iwl_priv *priv, int sta_id)
{
unsigned long flags;
......@@ -4039,7 +3797,7 @@ void iwl4965_set_rxon_ht(struct iwl_priv *priv, struct iwl_ht_info *ht_info)
rxon->flags |= cpu_to_le32(val << RXON_FLG_HT_OPERATING_MODE_POS);
iwl4965_set_rxon_chain(priv);
iwl_set_rxon_chain(priv);
IWL_DEBUG_ASSOC("supported HT rate 0x%X 0x%X 0x%X "
"rxon flags 0x%X operation mode :0x%X "
......@@ -4356,7 +4114,6 @@ static struct iwl_hcmd_utils_ops iwl4965_hcmd_utils = {
};
static struct iwl_lib_ops iwl4965_lib = {
.init_drv = iwl4965_init_drv,
.set_hw_params = iwl4965_hw_set_hw_params,
.alloc_shared_mem = iwl4965_alloc_shared_mem,
.free_shared_mem = iwl4965_free_shared_mem,
......
......@@ -748,7 +748,6 @@ extern int iwl4965_tx_queue_update_wr_ptr(struct iwl_priv *priv,
u16 byte_cnt);
extern void iwl4965_add_station(struct iwl_priv *priv, const u8 *addr,
int is_ap);
extern void iwl4965_set_rxon_chain(struct iwl_priv *priv);
extern int iwl4965_alive_notify(struct iwl_priv *priv);
extern void iwl4965_update_rate_scaling(struct iwl_priv *priv, u8 mode);
extern void iwl4965_rf_kill_ct_config(struct iwl_priv *priv);
......
......@@ -51,6 +51,45 @@ u32 iwl_debug_level;
EXPORT_SYMBOL(iwl_debug_level);
#endif
#define IWL_DECLARE_RATE_INFO(r, s, ip, in, rp, rn, pp, np) \
[IWL_RATE_##r##M_INDEX] = { IWL_RATE_##r##M_PLCP, \
IWL_RATE_SISO_##s##M_PLCP, \
IWL_RATE_MIMO2_##s##M_PLCP,\
IWL_RATE_MIMO3_##s##M_PLCP,\
IWL_RATE_##r##M_IEEE, \
IWL_RATE_##ip##M_INDEX, \
IWL_RATE_##in##M_INDEX, \
IWL_RATE_##rp##M_INDEX, \
IWL_RATE_##rn##M_INDEX, \
IWL_RATE_##pp##M_INDEX, \
IWL_RATE_##np##M_INDEX }
/*
* Parameter order:
* rate, ht rate, prev rate, next rate, prev tgg rate, next tgg rate
*
* If there isn't a valid next or previous rate then INV is used which
* maps to IWL_RATE_INVALID
*
*/
const struct iwl4965_rate_info iwl4965_rates[IWL_RATE_COUNT] = {
IWL_DECLARE_RATE_INFO(1, INV, INV, 2, INV, 2, INV, 2), /* 1mbps */
IWL_DECLARE_RATE_INFO(2, INV, 1, 5, 1, 5, 1, 5), /* 2mbps */
IWL_DECLARE_RATE_INFO(5, INV, 2, 6, 2, 11, 2, 11), /*5.5mbps */
IWL_DECLARE_RATE_INFO(11, INV, 9, 12, 9, 12, 5, 18), /* 11mbps */
IWL_DECLARE_RATE_INFO(6, 6, 5, 9, 5, 11, 5, 11), /* 6mbps */
IWL_DECLARE_RATE_INFO(9, 6, 6, 11, 6, 11, 5, 11), /* 9mbps */
IWL_DECLARE_RATE_INFO(12, 12, 11, 18, 11, 18, 11, 18), /* 12mbps */
IWL_DECLARE_RATE_INFO(18, 18, 12, 24, 12, 24, 11, 24), /* 18mbps */
IWL_DECLARE_RATE_INFO(24, 24, 18, 36, 18, 36, 18, 36), /* 24mbps */
IWL_DECLARE_RATE_INFO(36, 36, 24, 48, 24, 48, 24, 48), /* 36mbps */
IWL_DECLARE_RATE_INFO(48, 48, 36, 54, 36, 54, 36, 54), /* 48mbps */
IWL_DECLARE_RATE_INFO(54, 54, 48, INV, 48, INV, 48, INV),/* 54mbps */
IWL_DECLARE_RATE_INFO(60, 60, 48, INV, 48, INV, 48, INV),/* 60mbps */
/* FIXME:RS: ^^ should be INV (legacy) */
};
EXPORT_SYMBOL(iwl4965_rates);
/* This function both allocates and initializes hw and priv. */
struct ieee80211_hw *iwl_alloc_all(struct iwl_cfg *cfg,
struct ieee80211_ops *hw_ops)
......@@ -100,7 +139,7 @@ void iwlcore_clear_stations_table(struct iwl_priv *priv)
}
EXPORT_SYMBOL(iwlcore_clear_stations_table);
void iwlcore_reset_qos(struct iwl_priv *priv)
void iwl_reset_qos(struct iwl_priv *priv)
{
u16 cw_min = 15;
u16 cw_max = 1023;
......@@ -186,7 +225,289 @@ void iwlcore_reset_qos(struct iwl_priv *priv)
spin_unlock_irqrestore(&priv->lock, flags);
}
EXPORT_SYMBOL(iwlcore_reset_qos);
EXPORT_SYMBOL(iwl_reset_qos);
#ifdef CONFIG_IWL4965_HT
static void iwlcore_init_ht_hw_capab(const struct iwl_priv *priv,
struct ieee80211_ht_info *ht_info,
enum ieee80211_band band)
{
ht_info->cap = 0;
memset(ht_info->supp_mcs_set, 0, 16);
ht_info->ht_supported = 1;
if (priv->hw_params.fat_channel & BIT(band)) {
ht_info->cap |= (u16)IEEE80211_HT_CAP_SUP_WIDTH;
ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_40;
ht_info->supp_mcs_set[4] = 0x01;
}
ht_info->cap |= (u16)IEEE80211_HT_CAP_GRN_FLD;
ht_info->cap |= (u16)IEEE80211_HT_CAP_SGI_20;
ht_info->cap |= (u16)(IEEE80211_HT_CAP_MIMO_PS &
(IWL_MIMO_PS_NONE << 2));
if (priv->cfg->mod_params->amsdu_size_8K)
ht_info->cap |= (u16)IEEE80211_HT_CAP_MAX_AMSDU;
ht_info->ampdu_factor = CFG_HT_RX_AMPDU_FACTOR_DEF;
ht_info->ampdu_density = CFG_HT_MPDU_DENSITY_DEF;
ht_info->supp_mcs_set[0] = 0xFF;
if (priv->hw_params.tx_chains_num >= 2)
ht_info->supp_mcs_set[1] = 0xFF;
if (priv->hw_params.tx_chains_num >= 3)
ht_info->supp_mcs_set[2] = 0xFF;
}
#endif /* CONFIG_IWL4965_HT */
static void iwlcore_init_hw_rates(struct iwl_priv *priv,
struct ieee80211_rate *rates)
{
int i;
for (i = 0; i < IWL_RATE_COUNT; i++) {
rates[i].bitrate = iwl4965_rates[i].ieee * 5;
rates[i].hw_value = i; /* Rate scaling will work on indexes */
rates[i].hw_value_short = i;
rates[i].flags = 0;
if ((i > IWL_LAST_OFDM_RATE) || (i < IWL_FIRST_OFDM_RATE)) {
/*
* If CCK != 1M then set short preamble rate flag.
*/
rates[i].flags |=
(iwl4965_rates[i].plcp == IWL_RATE_1M_PLCP) ?
0 : IEEE80211_RATE_SHORT_PREAMBLE;
}
}
}
/**
* iwlcore_init_geos - Initialize mac80211's geo/channel info based from eeprom
*/
static int iwlcore_init_geos(struct iwl_priv *priv)
{
struct iwl_channel_info *ch;
struct ieee80211_supported_band *sband;
struct ieee80211_channel *channels;
struct ieee80211_channel *geo_ch;
struct ieee80211_rate *rates;
int i = 0;
if (priv->bands[IEEE80211_BAND_2GHZ].n_bitrates ||
priv->bands[IEEE80211_BAND_5GHZ].n_bitrates) {
IWL_DEBUG_INFO("Geography modes already initialized.\n");
set_bit(STATUS_GEO_CONFIGURED, &priv->status);
return 0;
}
channels = kzalloc(sizeof(struct ieee80211_channel) *
priv->channel_count, GFP_KERNEL);
if (!channels)
return -ENOMEM;
rates = kzalloc((sizeof(struct ieee80211_rate) * (IWL_RATE_COUNT + 1)),
GFP_KERNEL);
if (!rates) {
kfree(channels);
return -ENOMEM;
}
/* 5.2GHz channels start after the 2.4GHz channels */
sband = &priv->bands[IEEE80211_BAND_5GHZ];
sband->channels = &channels[ARRAY_SIZE(iwl_eeprom_band_1)];
/* just OFDM */
sband->bitrates = &rates[IWL_FIRST_OFDM_RATE];
sband->n_bitrates = IWL_RATE_COUNT - IWL_FIRST_OFDM_RATE;
iwlcore_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_5GHZ);
sband = &priv->bands[IEEE80211_BAND_2GHZ];
sband->channels = channels;
/* OFDM & CCK */
sband->bitrates = rates;
sband->n_bitrates = IWL_RATE_COUNT;
iwlcore_init_ht_hw_capab(priv, &sband->ht_info, IEEE80211_BAND_2GHZ);
priv->ieee_channels = channels;
priv->ieee_rates = rates;
iwlcore_init_hw_rates(priv, rates);
for (i = 0; i < priv->channel_count; i++) {
ch = &priv->channel_info[i];
/* FIXME: might be removed if scan is OK */
if (!is_channel_valid(ch))
continue;
if (is_channel_a_band(ch))
sband = &priv->bands[IEEE80211_BAND_5GHZ];
else
sband = &priv->bands[IEEE80211_BAND_2GHZ];
geo_ch = &sband->channels[sband->n_channels++];
geo_ch->center_freq =
ieee80211_channel_to_frequency(ch->channel);
geo_ch->max_power = ch->max_power_avg;
geo_ch->max_antenna_gain = 0xff;
geo_ch->hw_value = ch->channel;
if (is_channel_valid(ch)) {
if (!(ch->flags & EEPROM_CHANNEL_IBSS))
geo_ch->flags |= IEEE80211_CHAN_NO_IBSS;
if (!(ch->flags & EEPROM_CHANNEL_ACTIVE))
geo_ch->flags |= IEEE80211_CHAN_PASSIVE_SCAN;
if (ch->flags & EEPROM_CHANNEL_RADAR)
geo_ch->flags |= IEEE80211_CHAN_RADAR;
if (ch->max_power_avg > priv->max_channel_txpower_limit)
priv->max_channel_txpower_limit =
ch->max_power_avg;
} else {
geo_ch->flags |= IEEE80211_CHAN_DISABLED;
}
/* Save flags for reg domain usage */
geo_ch->orig_flags = geo_ch->flags;
IWL_DEBUG_INFO("Channel %d Freq=%d[%sGHz] %s flag=0%X\n",
ch->channel, geo_ch->center_freq,
is_channel_a_band(ch) ? "5.2" : "2.4",
geo_ch->flags & IEEE80211_CHAN_DISABLED ?
"restricted" : "valid",
geo_ch->flags);
}
if ((priv->bands[IEEE80211_BAND_5GHZ].n_channels == 0) &&
priv->cfg->sku & IWL_SKU_A) {
printk(KERN_INFO DRV_NAME
": Incorrectly detected BG card as ABG. Please send "
"your PCI ID 0x%04X:0x%04X to maintainer.\n",
priv->pci_dev->device, priv->pci_dev->subsystem_device);
priv->cfg->sku &= ~IWL_SKU_A;
}
printk(KERN_INFO DRV_NAME
": Tunable channels: %d 802.11bg, %d 802.11a channels\n",
priv->bands[IEEE80211_BAND_2GHZ].n_channels,
priv->bands[IEEE80211_BAND_5GHZ].n_channels);
if (priv->bands[IEEE80211_BAND_2GHZ].n_channels)
priv->hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
&priv->bands[IEEE80211_BAND_2GHZ];
if (priv->bands[IEEE80211_BAND_5GHZ].n_channels)
priv->hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
&priv->bands[IEEE80211_BAND_5GHZ];
set_bit(STATUS_GEO_CONFIGURED, &priv->status);
return 0;
}
/*
* iwlcore_free_geos - undo allocations in iwlcore_init_geos
*/
void iwlcore_free_geos(struct iwl_priv *priv)
{
kfree(priv->ieee_channels);
kfree(priv->ieee_rates);
clear_bit(STATUS_GEO_CONFIGURED, &priv->status);
}
EXPORT_SYMBOL(iwlcore_free_geos);
#ifdef CONFIG_IWL4965_HT
static u8 is_single_rx_stream(struct iwl_priv *priv)
{
return !priv->current_ht_config.is_ht ||
((priv->current_ht_config.supp_mcs_set[1] == 0) &&
(priv->current_ht_config.supp_mcs_set[2] == 0)) ||
priv->ps_mode == IWL_MIMO_PS_STATIC;
}
#else
static inline u8 is_single_rx_stream(struct iwl_priv *priv)
{
return 1;
}
#endif /*CONFIG_IWL4965_HT */
/*
* Determine how many receiver/antenna chains to use.
* More provides better reception via diversity. Fewer saves power.
* MIMO (dual stream) requires at least 2, but works better with 3.
* This does not determine *which* chains to use, just how many.
*/
static int iwlcore_get_rx_chain_counter(struct iwl_priv *priv,
u8 *idle_state, u8 *rx_state)
{
u8 is_single = is_single_rx_stream(priv);
u8 is_cam = test_bit(STATUS_POWER_PMI, &priv->status) ? 0 : 1;
/* # of Rx chains to use when expecting MIMO. */
if (is_single || (!is_cam && (priv->ps_mode == IWL_MIMO_PS_STATIC)))
*rx_state = 2;
else
*rx_state = 3;
/* # Rx chains when idling and maybe trying to save power */
switch (priv->ps_mode) {
case IWL_MIMO_PS_STATIC:
case IWL_MIMO_PS_DYNAMIC:
*idle_state = (is_cam) ? 2 : 1;