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iwlwifi: mvm: Enable user set TX power

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Support Tx power limitations. These limitations can come from
mac80211 for various reasons.

Signed-off-by: Matti Gottlieb <matti.gottlieb@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Matti Gottlieb 2013-07-09 15:25:46 +03:00 committed by Johannes Berg
parent ac1ed4163b
commit 88f2fd7300
4 changed files with 40 additions and 2 deletions
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8
drivers/net/wireless/iwlwifi/iwl-nvm-parse.c
View File

@ -118,6 +118,7 @@ static const u8 iwl_nvm_channels[] = {
#define LAST_2GHZ_HT_PLUS 9
#define LAST_5GHZ_HT 161
#define DEFAULT_MAX_TX_POWER 16
/* rate data (static) */
static struct ieee80211_rate iwl_cfg80211_rates[] = {
@ -232,8 +233,11 @@ static int iwl_init_channel_map(struct device *dev, const struct iwl_cfg *cfg,
/* Initialize regulatory-based run-time data */
/* TODO: read the real value from the NVM */
channel->max_power = 0;
/*
* Default value - highest tx power value. max_power
* is not used in mvm, and is used for backwards compatibility
*/
channel->max_power = DEFAULT_MAX_TX_POWER;
is_5ghz = channel->band == IEEE80211_BAND_5GHZ;
IWL_DEBUG_EEPROM(dev,
"Ch. %d [%sGHz] %s%s%s%s%s%s(0x%02x %ddBm): Ad-Hoc %ssupported\n",

14
drivers/net/wireless/iwlwifi/mvm/fw-api.h
View File

@ -159,6 +159,7 @@ enum {
TX_ANT_CONFIGURATION_CMD = 0x98,
BT_CONFIG = 0x9b,
STATISTICS_NOTIFICATION = 0x9d,
REDUCE_TX_POWER_CMD = 0x9f,
/* RF-KILL commands and notifications */
CARD_STATE_CMD = 0xa0,
@ -226,6 +227,19 @@ struct iwl_tx_ant_cfg_cmd {
__le32 valid;
} __packed;
/**
* struct iwl_reduce_tx_power_cmd - TX power reduction command
* REDUCE_TX_POWER_CMD = 0x9f
* @flags: (reserved for future implementation)
* @mac_context_id: id of the mac ctx for which we are reducing TX power.
* @pwr_restriction: TX power restriction in dBms.
*/
struct iwl_reduce_tx_power_cmd {
u8 flags;
u8 mac_context_id;
__le16 pwr_restriction;
} __packed; /* TX_REDUCED_POWER_API_S_VER_1 */
/*
* Calibration control struct.
* Sent as part of the phy configuration command.

19
drivers/net/wireless/iwlwifi/mvm/mac80211.c
View File

@ -714,6 +714,20 @@ out_release:
mutex_unlock(&mvm->mutex);
}
static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
s8 tx_power)
{
/* FW is in charge of regulatory enforcement */
struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
.mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
.pwr_restriction = cpu_to_le16(tx_power),
};
return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, CMD_SYNC,
sizeof(reduce_txpwr_cmd),
&reduce_txpwr_cmd);
}
static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
{
return 0;
@ -794,6 +808,11 @@ static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
if (ret)
IWL_ERR(mvm, "failed to update power mode\n");
}
if (changes & BSS_CHANGED_TXPOWER) {
IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
bss_conf->txpower);
iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
}
}
static int iwl_mvm_start_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif)

1
drivers/net/wireless/iwlwifi/mvm/ops.c
View File

@ -275,6 +275,7 @@ static const char *iwl_mvm_cmd_strings[REPLY_MAX] = {
CMD(BEACON_NOTIFICATION),
CMD(BEACON_TEMPLATE_CMD),
CMD(STATISTICS_NOTIFICATION),
CMD(REDUCE_TX_POWER_CMD),
CMD(TX_ANT_CONFIGURATION_CMD),
CMD(D3_CONFIG_CMD),
CMD(PROT_OFFLOAD_CONFIG_CMD),