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linux/drivers/net/wireless/mwifiex/cfp.c

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/*
* Marvell Wireless LAN device driver: Channel, Frequence and Power
*
* Copyright (C) 2011, Marvell International Ltd.
*
* This software file (the "File") is distributed by Marvell International
* Ltd. under the terms of the GNU General Public License Version 2, June 1991
* (the "License"). You may use, redistribute and/or modify this File in
* accordance with the terms and conditions of the License, a copy of which
* is available by writing to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
* worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
*
* THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
* IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
* ARE EXPRESSLY DISCLAIMED. The License provides additional details about
* this warranty disclaimer.
*/
#include "decl.h"
#include "ioctl.h"
#include "util.h"
#include "fw.h"
#include "main.h"
#include "cfg80211.h"
/* 100mW */
#define MWIFIEX_TX_PWR_DEFAULT 20
/* 100mW */
#define MWIFIEX_TX_PWR_US_DEFAULT 20
/* 50mW */
#define MWIFIEX_TX_PWR_JP_DEFAULT 16
/* 100mW */
#define MWIFIEX_TX_PWR_FR_100MW 20
/* 10mW */
#define MWIFIEX_TX_PWR_FR_10MW 10
/* 100mW */
#define MWIFIEX_TX_PWR_EMEA_DEFAULT 20
static u8 adhoc_rates_b[B_SUPPORTED_RATES] = { 0x82, 0x84, 0x8b, 0x96, 0 };
static u8 adhoc_rates_g[G_SUPPORTED_RATES] = { 0x8c, 0x12, 0x98, 0x24,
0xb0, 0x48, 0x60, 0x6c, 0 };
static u8 adhoc_rates_bg[BG_SUPPORTED_RATES] = { 0x82, 0x84, 0x8b, 0x96,
0x0c, 0x12, 0x18, 0x24,
0x30, 0x48, 0x60, 0x6c, 0 };
static u8 adhoc_rates_a[A_SUPPORTED_RATES] = { 0x8c, 0x12, 0x98, 0x24,
0xb0, 0x48, 0x60, 0x6c, 0 };
static u8 supported_rates_a[A_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
0xb0, 0x48, 0x60, 0x6c, 0 };
static u16 mwifiex_data_rates[MWIFIEX_SUPPORTED_RATES_EXT] = { 0x02, 0x04,
0x0B, 0x16, 0x00, 0x0C, 0x12, 0x18,
0x24, 0x30, 0x48, 0x60, 0x6C, 0x90,
0x0D, 0x1A, 0x27, 0x34, 0x4E, 0x68,
0x75, 0x82, 0x0C, 0x1B, 0x36, 0x51,
0x6C, 0xA2, 0xD8, 0xF3, 0x10E, 0x00 };
static u8 supported_rates_b[B_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x16, 0 };
static u8 supported_rates_g[G_SUPPORTED_RATES] = { 0x0c, 0x12, 0x18, 0x24,
0x30, 0x48, 0x60, 0x6c, 0 };
static u8 supported_rates_bg[BG_SUPPORTED_RATES] = { 0x02, 0x04, 0x0b, 0x0c,
0x12, 0x16, 0x18, 0x24, 0x30, 0x48,
0x60, 0x6c, 0 };
u16 region_code_index[MWIFIEX_MAX_REGION_CODE] = { 0x10, 0x20, 0x30,
0x32, 0x40, 0x41, 0xff };
static u8 supported_rates_n[N_SUPPORTED_RATES] = { 0x02, 0x04, 0 };
/*
* This function maps an index in supported rates table into
* the corresponding data rate.
*/
u32 mwifiex_index_to_data_rate(struct mwifiex_private *priv, u8 index,
u8 ht_info)
{
/*
* For every mcs_rate line, the first 8 bytes are for stream 1x1,
* and all 16 bytes are for stream 2x2.
*/
u16 mcs_rate[4][16] = {
/* LGI 40M */
{ 0x1b, 0x36, 0x51, 0x6c, 0xa2, 0xd8, 0xf3, 0x10e,
0x36, 0x6c, 0xa2, 0xd8, 0x144, 0x1b0, 0x1e6, 0x21c },
/* SGI 40M */
{ 0x1e, 0x3c, 0x5a, 0x78, 0xb4, 0xf0, 0x10e, 0x12c,
0x3c, 0x78, 0xb4, 0xf0, 0x168, 0x1e0, 0x21c, 0x258 },
/* LGI 20M */
{ 0x0d, 0x1a, 0x27, 0x34, 0x4e, 0x68, 0x75, 0x82,
0x1a, 0x34, 0x4e, 0x68, 0x9c, 0xd0, 0xea, 0x104 },
/* SGI 20M */
{ 0x0e, 0x1c, 0x2b, 0x39, 0x56, 0x73, 0x82, 0x90,
0x1c, 0x39, 0x56, 0x73, 0xad, 0xe7, 0x104, 0x120 }
};
u32 mcs_num_supp =
(priv->adapter->hw_dev_mcs_support == HT_STREAM_2X2) ? 16 : 8;
u32 rate;
if (ht_info & BIT(0)) {
if (index == MWIFIEX_RATE_BITMAP_MCS0) {
if (ht_info & BIT(2))
rate = 0x0D; /* MCS 32 SGI rate */
else
rate = 0x0C; /* MCS 32 LGI rate */
} else if (index < mcs_num_supp) {
if (ht_info & BIT(1)) {
if (ht_info & BIT(2))
/* SGI, 40M */
rate = mcs_rate[1][index];
else
/* LGI, 40M */
rate = mcs_rate[0][index];
} else {
if (ht_info & BIT(2))
/* SGI, 20M */
rate = mcs_rate[3][index];
else
/* LGI, 20M */
rate = mcs_rate[2][index];
}
} else
rate = mwifiex_data_rates[0];
} else {
if (index >= MWIFIEX_SUPPORTED_RATES_EXT)
index = 0;
rate = mwifiex_data_rates[index];
}
return rate;
}
/*
* This function maps a data rate value into corresponding index in supported
* rates table.
*/
u8 mwifiex_data_rate_to_index(u32 rate)
{
u16 *ptr;
if (rate) {
ptr = memchr(mwifiex_data_rates, rate,
sizeof(mwifiex_data_rates));
if (ptr)
return (u8) (ptr - mwifiex_data_rates);
}
return 0;
}
/*
* This function returns the current active data rates.
*
* The result may vary depending upon connection status.
*/
u32 mwifiex_get_active_data_rates(struct mwifiex_private *priv, u8 *rates)
{
if (!priv->media_connected)
return mwifiex_get_supported_rates(priv, rates);
else
return mwifiex_copy_rates(rates, 0,
priv->curr_bss_params.data_rates,
priv->curr_bss_params.num_of_rates);
}
/*
* This function locates the Channel-Frequency-Power triplet based upon
* band and channel parameters.
*/
struct mwifiex_chan_freq_power *
mwifiex_get_cfp_by_band_and_channel_from_cfg80211(struct mwifiex_private
*priv, u8 band, u16 channel)
{
struct mwifiex_chan_freq_power *cfp = NULL;
struct ieee80211_supported_band *sband;
struct ieee80211_channel *ch;
int i;
if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
else
sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
if (!sband) {
dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
" & channel %d\n", __func__, band, channel);
return cfp;
}
for (i = 0; i < sband->n_channels; i++) {
ch = &sband->channels[i];
if (((ch->hw_value == channel) ||
(channel == FIRST_VALID_CHANNEL))
&& !(ch->flags & IEEE80211_CHAN_DISABLED)) {
priv->cfp.channel = channel;
priv->cfp.freq = ch->center_freq;
priv->cfp.max_tx_power = ch->max_power;
cfp = &priv->cfp;
break;
}
}
if (i == sband->n_channels)
dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
" & channel %d\n", __func__, band, channel);
return cfp;
}
/*
* This function locates the Channel-Frequency-Power triplet based upon
* band and frequency parameters.
*/
struct mwifiex_chan_freq_power *
mwifiex_get_cfp_by_band_and_freq_from_cfg80211(struct mwifiex_private *priv,
u8 band, u32 freq)
{
struct mwifiex_chan_freq_power *cfp = NULL;
struct ieee80211_supported_band *sband;
struct ieee80211_channel *ch;
int i;
if (mwifiex_band_to_radio_type(band) == HostCmd_SCAN_RADIO_TYPE_BG)
sband = priv->wdev->wiphy->bands[IEEE80211_BAND_2GHZ];
else
sband = priv->wdev->wiphy->bands[IEEE80211_BAND_5GHZ];
if (!sband) {
dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
" & freq %d\n", __func__, band, freq);
return cfp;
}
for (i = 0; i < sband->n_channels; i++) {
ch = &sband->channels[i];
if ((ch->center_freq == freq) &&
!(ch->flags & IEEE80211_CHAN_DISABLED)) {
priv->cfp.channel = ch->hw_value;
priv->cfp.freq = freq;
priv->cfp.max_tx_power = ch->max_power;
cfp = &priv->cfp;
break;
}
}
if (i == sband->n_channels)
dev_err(priv->adapter->dev, "%s: cannot find cfp by band %d"
" & freq %d\n", __func__, band, freq);
return cfp;
}
/*
* This function checks if the data rate is set to auto.
*/
u8
mwifiex_is_rate_auto(struct mwifiex_private *priv)
{
u32 i;
int rate_num = 0;
for (i = 0; i < ARRAY_SIZE(priv->bitmap_rates); i++)
if (priv->bitmap_rates[i])
rate_num++;
if (rate_num > 1)
return true;
else
return false;
}
/*
* This function converts rate bitmap into rate index.
*/
int mwifiex_get_rate_index(u16 *rate_bitmap, int size)
{
int i;
for (i = 0; i < size * 8; i++)
if (rate_bitmap[i / 16] & (1 << (i % 16)))
return i;
return 0;
}
/*
* This function gets the supported data rates.
*
* The function works in both Ad-Hoc and infra mode by printing the
* band and returning the data rates.
*/
u32 mwifiex_get_supported_rates(struct mwifiex_private *priv, u8 *rates)
{
u32 k = 0;
struct mwifiex_adapter *adapter = priv->adapter;
if (priv->bss_mode == NL80211_IFTYPE_STATION) {
switch (adapter->config_bands) {
case BAND_B:
dev_dbg(adapter->dev, "info: infra band=%d "
"supported_rates_b\n", adapter->config_bands);
k = mwifiex_copy_rates(rates, k, supported_rates_b,
sizeof(supported_rates_b));
break;
case BAND_G:
case BAND_G | BAND_GN:
dev_dbg(adapter->dev, "info: infra band=%d "
"supported_rates_g\n", adapter->config_bands);
k = mwifiex_copy_rates(rates, k, supported_rates_g,
sizeof(supported_rates_g));
break;
case BAND_B | BAND_G:
case BAND_A | BAND_B | BAND_G:
case BAND_A | BAND_B:
case BAND_A | BAND_B | BAND_G | BAND_GN | BAND_AN:
case BAND_B | BAND_G | BAND_GN:
dev_dbg(adapter->dev, "info: infra band=%d "
"supported_rates_bg\n", adapter->config_bands);
k = mwifiex_copy_rates(rates, k, supported_rates_bg,
sizeof(supported_rates_bg));
break;
case BAND_A:
case BAND_A | BAND_G:
dev_dbg(adapter->dev, "info: infra band=%d "
"supported_rates_a\n", adapter->config_bands);
k = mwifiex_copy_rates(rates, k, supported_rates_a,
sizeof(supported_rates_a));
break;
case BAND_A | BAND_AN:
case BAND_A | BAND_G | BAND_AN | BAND_GN:
dev_dbg(adapter->dev, "info: infra band=%d "
"supported_rates_a\n", adapter->config_bands);
k = mwifiex_copy_rates(rates, k, supported_rates_a,
sizeof(supported_rates_a));
break;
case BAND_GN:
dev_dbg(adapter->dev, "info: infra band=%d "
"supported_rates_n\n", adapter->config_bands);
k = mwifiex_copy_rates(rates, k, supported_rates_n,
sizeof(supported_rates_n));
break;
}
} else {
/* Ad-hoc mode */
switch (adapter->adhoc_start_band) {
case BAND_B:
dev_dbg(adapter->dev, "info: adhoc B\n");
k = mwifiex_copy_rates(rates, k, adhoc_rates_b,
sizeof(adhoc_rates_b));
break;
case BAND_G:
case BAND_G | BAND_GN:
dev_dbg(adapter->dev, "info: adhoc G only\n");
k = mwifiex_copy_rates(rates, k, adhoc_rates_g,
sizeof(adhoc_rates_g));
break;
case BAND_B | BAND_G:
case BAND_B | BAND_G | BAND_GN:
dev_dbg(adapter->dev, "info: adhoc BG\n");
k = mwifiex_copy_rates(rates, k, adhoc_rates_bg,
sizeof(adhoc_rates_bg));
break;
case BAND_A:
case BAND_A | BAND_AN:
dev_dbg(adapter->dev, "info: adhoc A\n");
k = mwifiex_copy_rates(rates, k, adhoc_rates_a,
sizeof(adhoc_rates_a));
break;
}
}
return k;
}
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