wl12xx: add driver

wl12xx is a driver for TI wl1251 802.11 chipset designed for embedded
devices, supporting both SDIO and SPI busses. Currently the driver
supports only SPI. Adding support 1253 (the 5 GHz version) should be
relatively easy. More information here:

http://focus.ti.com/general/docs/wtbu/wtbuproductcontent.tsp?contentId=4711&navigationId=12494&templateId=6123

(Collapsed original sequence of pre-merge patches into single commit for
initial merge. -- JWL)

Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 689 insertions, 0 deletions

diff --git a/drivers/net/wireless/wl12xx/acx.c b/drivers/net/wireless/wl12xx/acx.c
new file mode 100644
index 00000000000..1cfd458ad5a
--- /dev/null
+++ b/drivers/net/wireless/wl12xx/acx.c
@@ -0,0 +1,689 @@
+#include "acx.h"
+
+#include <linux/module.h>
+#include <linux/crc7.h>
+#include <linux/spi/spi.h>
+
+#include "wl12xx.h"
+#include "wl12xx_80211.h"
+#include "reg.h"
+#include "spi.h"
+#include "ps.h"
+
+int wl12xx_acx_frame_rates(struct wl12xx *wl, u8 ctrl_rate, u8 ctrl_mod,
+			   u8 mgt_rate, u8 mgt_mod)
+{
+	int ret;
+	struct acx_fw_gen_frame_rates rates;
+
+	wl12xx_debug(DEBUG_ACX, "acx frame rates");
+
+	rates.header.id = ACX_FW_GEN_FRAME_RATES;
+	rates.header.len = sizeof(struct acx_fw_gen_frame_rates) -
+		sizeof(struct acx_header);
+
+	rates.tx_ctrl_frame_rate = ctrl_rate;
+	rates.tx_ctrl_frame_mod = ctrl_mod;
+	rates.tx_mgt_frame_rate = mgt_rate;
+	rates.tx_mgt_frame_mod = mgt_mod;
+
+	ret = wl12xx_cmd_configure(wl, &rates, sizeof(rates));
+	if (ret < 0) {
+		wl12xx_error("Failed to set FW rates and modulation");
+		return ret;
+	}
+
+	return 0;
+}
+
+
+int wl12xx_acx_station_id(struct wl12xx *wl)
+{
+	int ret, i;
+	struct dot11_station_id mac;
+
+	wl12xx_debug(DEBUG_ACX, "acx dot11_station_id");
+
+	mac.header.id = DOT11_STATION_ID;
+	mac.header.len = sizeof(mac) - sizeof(struct acx_header);
+
+	for (i = 0; i < ETH_ALEN; i++)
+		mac.mac[i] = wl->mac_addr[ETH_ALEN - 1 - i];
+
+	ret = wl12xx_cmd_configure(wl, &mac, sizeof(mac));
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+int wl12xx_acx_default_key(struct wl12xx *wl, u8 key_id)
+{
+	struct acx_dot11_default_key default_key;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx dot11_default_key (%d)", key_id);
+
+	default_key.header.id = DOT11_DEFAULT_KEY;
+	default_key.header.len = sizeof(default_key) -
+		sizeof(struct acx_header);
+
+	default_key.id = key_id;
+
+	ret = wl12xx_cmd_configure(wl, &default_key, sizeof(default_key));
+	if (ret < 0) {
+		wl12xx_error("Couldnt set default key");
+		return ret;
+	}
+
+	wl->default_key = key_id;
+
+	return 0;
+}
+
+int wl12xx_acx_wake_up_conditions(struct wl12xx *wl, u8 listen_interval)
+{
+	struct acx_wake_up_condition wake_up;
+
+	wl12xx_debug(DEBUG_ACX, "acx wake up conditions");
+
+	wake_up.header.id = ACX_WAKE_UP_CONDITIONS;
+	wake_up.header.len = sizeof(wake_up) - sizeof(struct acx_header);
+
+	wake_up.wake_up_event = WAKE_UP_EVENT_DTIM_BITMAP;
+	wake_up.listen_interval = listen_interval;
+
+	return wl12xx_cmd_configure(wl, &wake_up, sizeof(wake_up));
+}
+
+int wl12xx_acx_sleep_auth(struct wl12xx *wl, u8 sleep_auth)
+{
+	int ret;
+	struct acx_sleep_auth auth;
+
+	wl12xx_debug(DEBUG_ACX, "acx sleep auth");
+
+	auth.header.id = ACX_SLEEP_AUTH;
+	auth.header.len = sizeof(auth) - sizeof(struct acx_header);
+
+	auth.sleep_auth = sleep_auth;
+
+	ret = wl12xx_cmd_configure(wl, &auth, sizeof(auth));
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+int wl12xx_acx_fw_version(struct wl12xx *wl, char *buf, size_t len)
+{
+	struct wl12xx_command cmd;
+	struct acx_revision *rev;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx fw rev");
+
+	memset(&cmd, 0, sizeof(cmd));
+
+	ret = wl12xx_cmd_interrogate(wl, ACX_FW_REV, sizeof(*rev), &cmd);
+	if (ret < 0) {
+		wl12xx_warning("ACX_FW_REV interrogate failed");
+		return ret;
+	}
+
+	rev = (struct acx_revision *) &cmd.parameters;
+
+	/* be careful with the buffer sizes */
+	strncpy(buf, rev->fw_version, min(len, sizeof(rev->fw_version)));
+
+	/*
+	 * if the firmware version string is exactly
+	 * sizeof(rev->fw_version) long or fw_len is less than
+	 * sizeof(rev->fw_version) it won't be null terminated
+	 */
+	buf[min(len, sizeof(rev->fw_version)) - 1] = '\0';
+
+	return 0;
+}
+
+int wl12xx_acx_tx_power(struct wl12xx *wl, int power)
+{
+	struct acx_current_tx_power ie;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx dot11_cur_tx_pwr");
+
+	if (power < 0 || power > 25)
+		return -EINVAL;
+
+	memset(&ie, 0, sizeof(ie));
+
+	ie.header.id = DOT11_CUR_TX_PWR;
+	ie.header.len = sizeof(ie) - sizeof(struct acx_header);
+	ie.current_tx_power = power * 10;
+
+	ret = wl12xx_cmd_configure(wl, &ie, sizeof(ie));
+	if (ret < 0) {
+		wl12xx_warning("configure of tx power failed: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_acx_feature_cfg(struct wl12xx *wl)
+{
+	struct acx_feature_config feature;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx feature cfg");
+
+	memset(&feature, 0, sizeof(feature));
+
+	feature.header.id = ACX_FEATURE_CFG;
+	feature.header.len = sizeof(feature) - sizeof(struct acx_header);
+
+	/* DF_ENCRYPTION_DISABLE and DF_SNIFF_MODE_ENABLE are disabled */
+	feature.data_flow_options = 0;
+	feature.options = 0;
+
+	ret = wl12xx_cmd_configure(wl, &feature, sizeof(feature));
+	if (ret < 0)
+		wl12xx_error("Couldnt set HW encryption");
+
+	return ret;
+}
+
+int wl12xx_acx_mem_map(struct wl12xx *wl, void *mem_map, size_t len)
+{
+	struct wl12xx_command cmd;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx mem map");
+
+	ret = wl12xx_cmd_interrogate(wl, ACX_MEM_MAP, len, &cmd);
+	if (ret < 0)
+		return ret;
+	else if (cmd.status != CMD_STATUS_SUCCESS)
+		return -EIO;
+
+	memcpy(mem_map, &cmd.parameters, len);
+
+	return 0;
+}
+
+int wl12xx_acx_data_path_params(struct wl12xx *wl,
+				struct acx_data_path_params_resp *data_path)
+{
+	struct acx_data_path_params params;
+	struct wl12xx_command cmd;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx data path params");
+
+	params.rx_packet_ring_chunk_size = DP_RX_PACKET_RING_CHUNK_SIZE;
+	params.tx_packet_ring_chunk_size = DP_TX_PACKET_RING_CHUNK_SIZE;
+
+	params.rx_packet_ring_chunk_num = DP_RX_PACKET_RING_CHUNK_NUM;
+	params.tx_packet_ring_chunk_num = DP_TX_PACKET_RING_CHUNK_NUM;
+
+	params.tx_complete_threshold = 1;
+
+	params.tx_complete_ring_depth = FW_TX_CMPLT_BLOCK_SIZE;
+
+	params.tx_complete_timeout = DP_TX_COMPLETE_TIME_OUT;
+
+	params.header.id = ACX_DATA_PATH_PARAMS;
+	params.header.len = sizeof(params) - sizeof(struct acx_header);
+
+	ret = wl12xx_cmd_configure(wl, &params, sizeof(params));
+	if (ret < 0)
+		return ret;
+
+
+	ret = wl12xx_cmd_interrogate(wl, ACX_DATA_PATH_PARAMS,
+				     sizeof(struct acx_data_path_params_resp),
+				     &cmd);
+
+	if (ret < 0) {
+		wl12xx_warning("failed to read data path parameters: %d", ret);
+		return ret;
+	} else if (cmd.status != CMD_STATUS_SUCCESS) {
+		wl12xx_warning("data path parameter acx status failed");
+		return -EIO;
+	}
+
+	memcpy(data_path, &cmd.parameters, sizeof(*data_path));
+
+	return 0;
+}
+
+int wl12xx_acx_rx_msdu_life_time(struct wl12xx *wl, u32 life_time)
+{
+	struct rx_msdu_lifetime msdu_lifetime;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx rx msdu life time");
+
+	msdu_lifetime.header.id = DOT11_RX_MSDU_LIFE_TIME;
+	msdu_lifetime.header.len = sizeof(msdu_lifetime) -
+		sizeof(struct acx_header);
+	msdu_lifetime.lifetime = life_time;
+
+	ret = wl12xx_cmd_configure(wl, &msdu_lifetime, sizeof(msdu_lifetime));
+	if (ret < 0) {
+		wl12xx_warning("failed to set rx msdu life time: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_acx_rx_config(struct wl12xx *wl, u32 config, u32 filter)
+{
+	struct acx_rx_config rx_config;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx rx config");
+
+	rx_config.header.id = ACX_RX_CFG;
+	rx_config.header.len = sizeof(rx_config) - sizeof(struct acx_header);
+	rx_config.config_options = config;
+	rx_config.filter_options = filter;
+
+	ret = wl12xx_cmd_configure(wl, &rx_config, sizeof(rx_config));
+	if (ret < 0) {
+		wl12xx_warning("failed to set rx config: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_acx_pd_threshold(struct wl12xx *wl)
+{
+	struct acx_packet_detection packet_detection;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx data pd threshold");
+
+	/* FIXME: threshold value not set */
+	packet_detection.header.id = ACX_PD_THRESHOLD;
+	packet_detection.header.len = sizeof(packet_detection) -
+		sizeof(struct acx_header);
+
+	ret = wl12xx_cmd_configure(wl, &packet_detection,
+				   sizeof(packet_detection));
+	if (ret < 0) {
+		wl12xx_warning("failed to set pd threshold: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_acx_slot(struct wl12xx *wl, enum acx_slot_type slot_time)
+{
+	struct acx_slot slot;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx slot");
+
+	slot.header.id = ACX_SLOT;
+	slot.header.len = sizeof(slot) - sizeof(struct acx_header);
+
+	slot.wone_index = STATION_WONE_INDEX;
+	slot.slot_time = slot_time;
+
+	ret = wl12xx_cmd_configure(wl, &slot, sizeof(slot));
+	if (ret < 0) {
+		wl12xx_warning("failed to set slot time: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_acx_group_address_tbl(struct wl12xx *wl)
+{
+	struct multicast_grp_addr_start multicast;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx group address tbl");
+
+	/* MAC filtering */
+	multicast.header.id = DOT11_GROUP_ADDRESS_TBL;
+	multicast.header.len = sizeof(multicast) - sizeof(struct acx_header);
+
+	multicast.enabled = 0;
+	multicast.num_groups = 0;
+	memset(multicast.mac_table, 0, ADDRESS_GROUP_MAX_LEN);
+
+	ret = wl12xx_cmd_configure(wl, &multicast, sizeof(multicast));
+	if (ret < 0) {
+		wl12xx_warning("failed to set group addr table: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_acx_service_period_timeout(struct wl12xx *wl)
+{
+	struct acx_rx_timeout rx_timeout;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx service period timeout");
+
+	/* RX timeout */
+	rx_timeout.header.id = ACX_SERVICE_PERIOD_TIMEOUT;
+	rx_timeout.header.len = sizeof(rx_timeout) - sizeof(struct acx_header);
+
+	rx_timeout.ps_poll_timeout = RX_TIMEOUT_PS_POLL_DEF;
+	rx_timeout.upsd_timeout = RX_TIMEOUT_UPSD_DEF;
+
+	ret = wl12xx_cmd_configure(wl, &rx_timeout, sizeof(rx_timeout));
+	if (ret < 0) {
+		wl12xx_warning("failed to set service period timeout: %d",
+			       ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_acx_rts_threshold(struct wl12xx *wl, u16 rts_threshold)
+{
+	struct acx_rts_threshold rts;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx rts threshold");
+
+	rts.header.id = DOT11_RTS_THRESHOLD;
+	rts.header.len = sizeof(rts) - sizeof(struct acx_header);
+
+	rts.threshold = rts_threshold;
+
+	ret = wl12xx_cmd_configure(wl, &rts, sizeof(rts));
+	if (ret < 0) {
+		wl12xx_warning("failed to set rts threshold: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_acx_beacon_filter_opt(struct wl12xx *wl)
+{
+	struct acx_beacon_filter_option beacon_filter;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx beacon filter opt");
+
+	beacon_filter.header.id = ACX_BEACON_FILTER_OPT;
+	beacon_filter.header.len = sizeof(beacon_filter) -
+		sizeof(struct acx_header);
+
+	beacon_filter.enable = 0;
+	beacon_filter.max_num_beacons = 0;
+
+	ret = wl12xx_cmd_configure(wl, &beacon_filter, sizeof(beacon_filter));
+	if (ret < 0) {
+		wl12xx_warning("failed to set beacon filter opt: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_acx_beacon_filter_table(struct wl12xx *wl)
+{
+	struct acx_beacon_filter_ie_table ie_table;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx beacon filter table");
+
+	ie_table.header.id = ACX_BEACON_FILTER_TABLE;
+	ie_table.header.len = sizeof(ie_table) - sizeof(struct acx_header);
+
+	ie_table.num_ie = 0;
+	memset(ie_table.table, 0, BEACON_FILTER_TABLE_MAX_SIZE);
+
+	ret = wl12xx_cmd_configure(wl, &ie_table, sizeof(ie_table));
+	if (ret < 0) {
+		wl12xx_warning("failed to set beacon filter table: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_acx_sg_enable(struct wl12xx *wl)
+{
+	struct acx_bt_wlan_coex pta;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx sg enable");
+
+	pta.header.id = ACX_SG_ENABLE;
+	pta.header.len = sizeof(pta) - sizeof(struct acx_header);
+
+	pta.enable = SG_ENABLE;
+
+	ret = wl12xx_cmd_configure(wl, &pta, sizeof(pta));
+	if (ret < 0) {
+		wl12xx_warning("failed to set softgemini enable: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_acx_sg_cfg(struct wl12xx *wl)
+{
+	struct acx_bt_wlan_coex_param param;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx sg cfg");
+
+	/* BT-WLAN coext parameters */
+	param.header.id = ACX_SG_CFG;
+	param.header.len = sizeof(param) - sizeof(struct acx_header);
+
+	param.min_rate = RATE_INDEX_24MBPS;
+	param.bt_hp_max_time = PTA_BT_HP_MAXTIME_DEF;
+	param.wlan_hp_max_time = PTA_WLAN_HP_MAX_TIME_DEF;
+	param.sense_disable_timer = PTA_SENSE_DISABLE_TIMER_DEF;
+	param.rx_time_bt_hp = PTA_PROTECTIVE_RX_TIME_DEF;
+	param.tx_time_bt_hp = PTA_PROTECTIVE_TX_TIME_DEF;
+	param.rx_time_bt_hp_fast = PTA_PROTECTIVE_RX_TIME_FAST_DEF;
+	param.tx_time_bt_hp_fast = PTA_PROTECTIVE_TX_TIME_FAST_DEF;
+	param.wlan_cycle_fast = PTA_CYCLE_TIME_FAST_DEF;
+	param.bt_anti_starvation_period = PTA_ANTI_STARVE_PERIOD_DEF;
+	param.next_bt_lp_packet = PTA_TIMEOUT_NEXT_BT_LP_PACKET_DEF;
+	param.wake_up_beacon = PTA_TIME_BEFORE_BEACON_DEF;
+	param.hp_dm_max_guard_time = PTA_HPDM_MAX_TIME_DEF;
+	param.next_wlan_packet = PTA_TIME_OUT_NEXT_WLAN_DEF;
+	param.antenna_type = PTA_ANTENNA_TYPE_DEF;
+	param.signal_type = PTA_SIGNALING_TYPE_DEF;
+	param.afh_leverage_on = PTA_AFH_LEVERAGE_ON_DEF;
+	param.quiet_cycle_num = PTA_NUMBER_QUIET_CYCLE_DEF;
+	param.max_cts = PTA_MAX_NUM_CTS_DEF;
+	param.wlan_packets_num = PTA_NUMBER_OF_WLAN_PACKETS_DEF;
+	param.bt_packets_num = PTA_NUMBER_OF_BT_PACKETS_DEF;
+	param.missed_rx_avalanche = PTA_RX_FOR_AVALANCHE_DEF;
+	param.wlan_elp_hp = PTA_ELP_HP_DEF;
+	param.bt_anti_starvation_cycles = PTA_ANTI_STARVE_NUM_CYCLE_DEF;
+	param.ack_mode_dual_ant = PTA_ACK_MODE_DEF;
+	param.pa_sd_enable = PTA_ALLOW_PA_SD_DEF;
+	param.pta_auto_mode_enable = PTA_AUTO_MODE_NO_CTS_DEF;
+	param.bt_hp_respected_num = PTA_BT_HP_RESPECTED_DEF;
+
+	ret = wl12xx_cmd_configure(wl, &param, sizeof(param));
+	if (ret < 0) {
+		wl12xx_warning("failed to set sg config: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_acx_cca_threshold(struct wl12xx *wl)
+{
+	struct acx_energy_detection detection;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx cca threshold");
+
+	detection.header.id = ACX_CCA_THRESHOLD;
+	detection.header.len = sizeof(detection) - sizeof(struct acx_header);
+
+	detection.rx_cca_threshold = CCA_THRSH_DISABLE_ENERGY_D;
+	detection.tx_energy_detection = 0;
+
+	ret = wl12xx_cmd_configure(wl, &detection, sizeof(detection));
+	if (ret < 0) {
+		wl12xx_warning("failed to set cca threshold: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_acx_bcn_dtim_options(struct wl12xx *wl)
+{
+	struct acx_beacon_broadcast bb;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx bcn dtim options");
+
+	bb.header.id = ACX_BCN_DTIM_OPTIONS;
+	bb.header.len = sizeof(bb) - sizeof(struct acx_header);
+
+	bb.beacon_rx_timeout = BCN_RX_TIMEOUT_DEF_VALUE;
+	bb.broadcast_timeout = BROADCAST_RX_TIMEOUT_DEF_VALUE;
+	bb.rx_broadcast_in_ps = RX_BROADCAST_IN_PS_DEF_VALUE;
+	bb.ps_poll_threshold = CONSECUTIVE_PS_POLL_FAILURE_DEF;
+
+	ret = wl12xx_cmd_configure(wl, &bb, sizeof(bb));
+	if (ret < 0) {
+		wl12xx_warning("failed to set rx config: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_acx_aid(struct wl12xx *wl, u16 aid)
+{
+	struct acx_aid acx_aid;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx aid");
+
+	acx_aid.header.id = ACX_AID;
+	acx_aid.header.len = sizeof(acx_aid) - sizeof(struct acx_header);
+
+	acx_aid.aid = aid;
+
+	ret = wl12xx_cmd_configure(wl, &acx_aid, sizeof(acx_aid));
+	if (ret < 0) {
+		wl12xx_warning("failed to set aid: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_acx_event_mbox_mask(struct wl12xx *wl, u32 event_mask)
+{
+	struct acx_event_mask mask;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx event mbox mask");
+
+	mask.header.id = ACX_EVENT_MBOX_MASK;
+	mask.header.len = sizeof(mask) - sizeof(struct acx_header);
+
+	/* high event mask is unused */
+	mask.high_event_mask = 0xffffffff;
+
+	mask.event_mask = event_mask;
+
+	ret = wl12xx_cmd_configure(wl, &mask, sizeof(mask));
+	if (ret < 0) {
+		wl12xx_warning("failed to set aid: %d", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+int wl12xx_acx_set_preamble(struct wl12xx *wl, enum acx_preamble_type preamble)
+{
+	struct acx_preamble ie;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx_set_preamble");
+
+	memset(&ie, 0, sizeof(ie));
+
+	ie.header.id = ACX_PREAMBLE_TYPE;
+	ie.header.len = sizeof(ie) - sizeof(struct acx_header);
+	ie.preamble = preamble;
+	ret = wl12xx_cmd_configure(wl, &ie, sizeof(ie));
+	if (ret < 0) {
+		wl12xx_warning("Setting of preamble failed: %d", ret);
+		return ret;
+	}
+	return 0;
+}
+
+int wl12xx_acx_cts_protect(struct wl12xx *wl,
+			   enum acx_ctsprotect_type ctsprotect)
+{
+	struct acx_ctsprotect ie;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx_set_ctsprotect");
+
+	memset(&ie, 0, sizeof(ie));
+
+	ie.header.id = ACX_CTS_PROTECTION;
+	ie.header.len = sizeof(ie) - sizeof(struct acx_header);
+	ie.ctsprotect = ctsprotect;
+	ret = wl12xx_cmd_configure(wl, &ie, sizeof(ie));
+	if (ret < 0) {
+		wl12xx_warning("Setting of ctsprotect failed: %d", ret);
+		return ret;
+	}
+	return 0;
+}
+
+int wl12xx_acx_statistics(struct wl12xx *wl, struct acx_statistics *stats)
+{
+	struct wl12xx_command *answer;
+	int ret;
+
+	wl12xx_debug(DEBUG_ACX, "acx statistics");
+
+	answer = kmalloc(sizeof(*answer), GFP_KERNEL);
+	if (!answer) {
+		wl12xx_warning("could not allocate memory for acx statistics");
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	ret = wl12xx_cmd_interrogate(wl, ACX_STATISTICS, sizeof(*answer),
+				     answer);
+	if (ret < 0) {
+		wl12xx_warning("acx statistics failed: %d", ret);
+		goto out;
+	}
+
+	memcpy(stats, answer->parameters, sizeof(*stats));
+
+out:
+	kfree(answer);
+	return ret;
+}