void iwl_set_rate(struct iwl_priv *priv)
{
const struct ieee80211_supported_band *hw = NULL;
struct ieee80211_rate *rate;
struct iwl_rxon_context *ctx;
int i;
hw = iwl_get_hw_mode(priv, priv->band);
if (!hw) {
IWL_ERR(priv, "Failed to set rate: unable to get hw mode\n");
return;
}
priv->active_rate = 0;
for (i = 0; i < hw->n_bitrates; i++) {
rate = &(hw->bitrates[i]);
if (rate->hw_value < IWL_RATE_COUNT_LEGACY)
priv->active_rate |= (1 << rate->hw_value);
}
IWL_DEBUG_RATE(priv, "Set active_rate = %0x\n", priv->active_rate);
for_each_context(priv, ctx) {
ctx->staging.cck_basic_rates =
(IWL_CCK_BASIC_RATES_MASK >> IWL_FIRST_CCK_RATE) & 0xF;
ctx->staging.ofdm_basic_rates =
(IWL_OFDM_BASIC_RATES_MASK >> IWL_FIRST_OFDM_RATE) & 0xFF;
}
static u16 iwl_fill_probe_req(struct iwl_priv *priv,
enum ieee80211_band band,
struct ieee80211_mgmt *frame,
int left)
{
int len = 0;
u8 *pos = NULL;
u16 active_rates, ret_rates, cck_rates, active_rate_basic;
const struct ieee80211_supported_band *sband =
iwl_get_hw_mode(priv, band);
/* Make sure there is enough space for the probe request,
* two mandatory IEs and the data */
left -= 24;
if (left < 0)
return 0;
frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
memcpy(frame->da, iwl_bcast_addr, ETH_ALEN);
memcpy(frame->sa, priv->mac_addr, ETH_ALEN);
memcpy(frame->bssid, iwl_bcast_addr, ETH_ALEN);
frame->seq_ctrl = 0;
len += 24;
/* ...next IE... */
pos = &frame->u.probe_req.variable[0];
/* fill in our indirect SSID IE */
left -= 2;
if (left < 0)
return 0;
*pos++ = WLAN_EID_SSID;
*pos++ = 0;
len += 2;
/* fill in supported rate */
left -= 2;
if (left < 0)
return 0;
*pos++ = WLAN_EID_SUPP_RATES;
*pos = 0;
/* exclude 60M rate */
active_rates = priv->rates_mask;
active_rates &= ~IWL_RATE_60M_MASK;
active_rate_basic = active_rates & IWL_BASIC_RATES_MASK;
cck_rates = IWL_CCK_RATES_MASK & active_rates;
ret_rates = iwl_supported_rate_to_ie(pos, cck_rates,
active_rate_basic, &left);
active_rates &= ~ret_rates;
ret_rates = iwl_supported_rate_to_ie(pos, active_rates,
active_rate_basic, &left);
active_rates &= ~ret_rates;
len += 2 + *pos;
pos += (*pos) + 1;
if (active_rates == 0)
goto fill_end;
/* fill in supported extended rate */
/* ...next IE... */
left -= 2;
if (left < 0)
return 0;
/* ... fill it in... */
*pos++ = WLAN_EID_EXT_SUPP_RATES;
*pos = 0;
iwl_supported_rate_to_ie(pos, active_rates, active_rate_basic, &left);
if (*pos > 0) {
len += 2 + *pos;
pos += (*pos) + 1;
} else {
pos--;
}
fill_end:
left -= 2;
if (left < 0)
return 0;
*pos++ = WLAN_EID_HT_CAPABILITY;
*pos = 0;
iwl_ht_cap_to_ie(sband, pos, &left);
if (*pos > 0)
len += 2 + *pos;
return (u16)len;
}
static int iwl_get_channels_for_scan(struct iwl_priv *priv,
enum ieee80211_band band,
u8 is_active, u8 n_probes,
struct iwl_scan_channel *scan_ch)
{
const struct ieee80211_channel *channels = NULL;
const struct ieee80211_supported_band *sband;
const struct iwl_channel_info *ch_info;
u16 passive_dwell = 0;
u16 active_dwell = 0;
int added, i;
u16 channel;
sband = iwl_get_hw_mode(priv, band);
if (!sband)
return 0;
channels = sband->channels;
active_dwell = iwl_get_active_dwell_time(priv, band, n_probes);
passive_dwell = iwl_get_passive_dwell_time(priv, band);
if (passive_dwell <= active_dwell)
passive_dwell = active_dwell + 1;
for (i = 0, added = 0; i < sband->n_channels; i++) {
if (channels[i].flags & IEEE80211_CHAN_DISABLED)
continue;
channel =
ieee80211_frequency_to_channel(channels[i].center_freq);
scan_ch->channel = cpu_to_le16(channel);
ch_info = iwl_get_channel_info(priv, band, channel);
if (!is_channel_valid(ch_info)) {
IWL_DEBUG_SCAN("Channel %d is INVALID for this band.\n",
channel);
continue;
}
if (!is_active || is_channel_passive(ch_info) ||
(channels[i].flags & IEEE80211_CHAN_PASSIVE_SCAN))
scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE;
else
scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE;
if (n_probes)
scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes);
scan_ch->active_dwell = cpu_to_le16(active_dwell);
scan_ch->passive_dwell = cpu_to_le16(passive_dwell);
/* Set txpower levels to defaults */
scan_ch->dsp_atten = 110;
/* NOTE: if we were doing 6Mb OFDM for scans we'd use
* power level:
* scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3;
*/
if (band == IEEE80211_BAND_5GHZ)
scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3;
else
scan_ch->tx_gain = ((1 << 5) | (5 << 3));
IWL_DEBUG_SCAN("Scanning ch=%d prob=0x%X [%s %d]\n",
channel, le32_to_cpu(scan_ch->type),
(scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
"ACTIVE" : "PASSIVE",
(scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ?
active_dwell : passive_dwell);
scan_ch++;
added++;
}
IWL_DEBUG_SCAN("total channels to scan %d \n", added);
return added;
}
static ssize_t
iwl_legacy_dbgfs_channels_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct iwl_priv *priv = file->private_data;
struct ieee80211_channel *channels = NULL;
const struct ieee80211_supported_band *supp_band = NULL;
int pos = 0, i, bufsz = PAGE_SIZE;
char *buf;
ssize_t ret;
if (!test_bit(STATUS_GEO_CONFIGURED, &priv->status))
return -EAGAIN;
buf = kzalloc(bufsz, GFP_KERNEL);
if (!buf) {
IWL_ERR(priv, "Can not allocate Buffer\n");
return -ENOMEM;
}
supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_2GHZ);
if (supp_band) {
channels = supp_band->channels;
pos += scnprintf(buf + pos, bufsz - pos,
"Displaying %d channels in 2.4GHz band 802.11bg):\n",
supp_band->n_channels);
for (i = 0; i < supp_band->n_channels; i++)
pos += scnprintf(buf + pos, bufsz - pos,
"%d: %ddBm: BSS%s%s, %s.\n",
channels[i].hw_value,
channels[i].max_power,
channels[i].flags & IEEE80211_CHAN_RADAR ?
" (IEEE 802.11h required)" : "",
((channels[i].flags & IEEE80211_CHAN_NO_IBSS)
|| (channels[i].flags &
IEEE80211_CHAN_RADAR)) ? "" :
", IBSS",
channels[i].flags &
IEEE80211_CHAN_PASSIVE_SCAN ?
"passive only" : "active/passive");
}
supp_band = iwl_get_hw_mode(priv, IEEE80211_BAND_5GHZ);
if (supp_band) {
channels = supp_band->channels;
pos += scnprintf(buf + pos, bufsz - pos,
"Displaying %d channels in 5.2GHz band (802.11a)\n",
supp_band->n_channels);
for (i = 0; i < supp_band->n_channels; i++)
pos += scnprintf(buf + pos, bufsz - pos,
"%d: %ddBm: BSS%s%s, %s.\n",
channels[i].hw_value,
channels[i].max_power,
channels[i].flags & IEEE80211_CHAN_RADAR ?
" (IEEE 802.11h required)" : "",
((channels[i].flags & IEEE80211_CHAN_NO_IBSS)
|| (channels[i].flags &
IEEE80211_CHAN_RADAR)) ? "" :
", IBSS",
channels[i].flags &
IEEE80211_CHAN_PASSIVE_SCAN ?
"passive only" : "active/passive");
}
ret = simple_read_from_buffer(user_buf, count, ppos, buf, pos);
kfree(buf);
return ret;
}