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// SPDX-License-Identifier: GPL-2.0
/* Implement 802.11d. */
#include "dot11d.h"
void rtl8192u_dot11d_init(struct ieee80211_device *ieee)
{
struct rt_dot11d_info *dot11d_info = GET_DOT11D_INFO(ieee);
dot11d_info->dot11d_enabled = false;
dot11d_info->state = DOT11D_STATE_NONE;
dot11d_info->country_ie_len = 0;
memset(dot11d_info->channel_map, 0, MAX_CHANNEL_NUMBER + 1);
memset(dot11d_info->max_tx_pwr_dbm_list, 0xFF, MAX_CHANNEL_NUMBER + 1);
RESET_CIE_WATCHDOG(ieee);
netdev_info(ieee->dev, "rtl8192u_dot11d_init()\n");
}
EXPORT_SYMBOL(rtl8192u_dot11d_init);
/* Reset to the state as we are just entering a regulatory domain. */
void dot11d_reset(struct ieee80211_device *ieee)
{
u32 i;
struct rt_dot11d_info *dot11d_info = GET_DOT11D_INFO(ieee);
/* Clear old channel map */
memset(dot11d_info->channel_map, 0, MAX_CHANNEL_NUMBER + 1);
memset(dot11d_info->max_tx_pwr_dbm_list, 0xFF, MAX_CHANNEL_NUMBER + 1);
/* Set new channel map */
for (i = 1; i <= 11; i++)
(dot11d_info->channel_map)[i] = 1;
for (i = 12; i <= 14; i++)
(dot11d_info->channel_map)[i] = 2;
dot11d_info->state = DOT11D_STATE_NONE;
dot11d_info->country_ie_len = 0;
RESET_CIE_WATCHDOG(ieee);
}
EXPORT_SYMBOL(dot11d_reset);
/*
* Update country IE from Beacon or Probe Resopnse and configure PHY for
* operation in the regulatory domain.
*
* TODO: Configure Tx power.
* Assumption:
* 1. IS_DOT11D_ENABLE() is TRUE.
* 2. Input IE is an valid one.
*/
void dot11d_update_country_ie(struct ieee80211_device *dev, u8 *pTaddr,
u16 CoutryIeLen, u8 *pCoutryIe)
{
struct rt_dot11d_info *dot11d_info = GET_DOT11D_INFO(dev);
u8 i, j, NumTriples, MaxChnlNum;
struct chnl_txpower_triple *pTriple;
memset(dot11d_info->channel_map, 0, MAX_CHANNEL_NUMBER + 1);
memset(dot11d_info->max_tx_pwr_dbm_list, 0xFF, MAX_CHANNEL_NUMBER + 1);
MaxChnlNum = 0;
NumTriples = (CoutryIeLen - 3) / 3; /* skip 3-byte country string. */
pTriple = (struct chnl_txpower_triple *)(pCoutryIe + 3);
for (i = 0; i < NumTriples; i++) {
if (MaxChnlNum >= pTriple->first_channel) {
/* It is not in a monotonically increasing order, so
* stop processing.
*/
netdev_err(dev->dev, "dot11d_update_country_ie(): Invalid country IE, skip it........1\n");
return;
}
if (MAX_CHANNEL_NUMBER < (pTriple->first_channel + pTriple->num_channels)) {
/* It is not a valid set of channel id, so stop
* processing.
*/
netdev_err(dev->dev, "dot11d_update_country_ie(): Invalid country IE, skip it........2\n");
return;
}
for (j = 0; j < pTriple->num_channels; j++) {
dot11d_info->channel_map[pTriple->first_channel + j] = 1;
dot11d_info->max_tx_pwr_dbm_list[pTriple->first_channel + j] = pTriple->max_tx_pwr_dbm;
MaxChnlNum = pTriple->first_channel + j;
}
pTriple = (struct chnl_txpower_triple *)((u8 *)pTriple + 3);
}
netdev_info(dev->dev, "Channel List:");
for (i = 1; i <= MAX_CHANNEL_NUMBER; i++)
if (dot11d_info->channel_map[i] > 0)
netdev_info(dev->dev, " %d", i);
netdev_info(dev->dev, "\n");
UPDATE_CIE_SRC(dev, pTaddr);
dot11d_info->country_ie_len = CoutryIeLen;
memcpy(dot11d_info->country_ie_buf, pCoutryIe, CoutryIeLen);
dot11d_info->state = DOT11D_STATE_LEARNED;
}
EXPORT_SYMBOL(dot11d_update_country_ie);
u8 dot11d_get_max_tx_pwr_in_dbm(struct ieee80211_device *dev, u8 Channel)
{
struct rt_dot11d_info *dot11d_info = GET_DOT11D_INFO(dev);
u8 MaxTxPwrInDbm = 255;
if (Channel > MAX_CHANNEL_NUMBER) {
netdev_err(dev->dev, "dot11d_get_max_tx_pwr_in_dbm(): Invalid Channel\n");
return MaxTxPwrInDbm;
}
if (dot11d_info->channel_map[Channel])
MaxTxPwrInDbm = dot11d_info->max_tx_pwr_dbm_list[Channel];
return MaxTxPwrInDbm;
}
EXPORT_SYMBOL(dot11d_get_max_tx_pwr_in_dbm);
void dot11d_scan_complete(struct ieee80211_device *dev)
{
struct rt_dot11d_info *dot11d_info = GET_DOT11D_INFO(dev);
switch (dot11d_info->state) {
case DOT11D_STATE_LEARNED:
dot11d_info->state = DOT11D_STATE_DONE;
break;
case DOT11D_STATE_DONE:
if (GET_CIE_WATCHDOG(dev) == 0) {
/* Reset country IE if previous one is gone. */
dot11d_reset(dev);
}
break;
case DOT11D_STATE_NONE:
break;
}
}
EXPORT_SYMBOL(dot11d_scan_complete);
int is_legal_channel(struct ieee80211_device *dev, u8 channel)
{
struct rt_dot11d_info *dot11d_info = GET_DOT11D_INFO(dev);
if (channel > MAX_CHANNEL_NUMBER) {
netdev_err(dev->dev, "is_legal_channel(): Invalid Channel\n");
return 0;
}
if (dot11d_info->channel_map[channel] > 0)
return 1;
return 0;
}
EXPORT_SYMBOL(is_legal_channel);
int to_legal_channel(struct ieee80211_device *dev, u8 channel)
{
struct rt_dot11d_info *dot11d_info = GET_DOT11D_INFO(dev);
u8 default_chn = 0;
u32 i = 0;
for (i = 1; i <= MAX_CHANNEL_NUMBER; i++) {
if (dot11d_info->channel_map[i] > 0) {
default_chn = i;
break;
}
}
if (channel > MAX_CHANNEL_NUMBER) {
netdev_err(dev->dev, "is_legal_channel(): Invalid Channel\n");
return default_chn;
}
if (dot11d_info->channel_map[channel] > 0)
return channel;
return default_chn;
}
EXPORT_SYMBOL(to_legal_channel);
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