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linux/drivers/net/wireless/wl1251/main.c
Jarkko Nikula 1e5f52de21 wl1251: Add support for idle mode 
On Nokia N900 the wl1251 consumes the most power when the interface is up
but not associated to access point (that supports PSM). In terms of battery
current consumption, the consumption is ~180 mA higher when the interface is
up but not associated and only ~5 mA higher when associated compared to
interface down and driver not loaded cases.

This patch adds support for the mac80211 idle notifications. Chip is put into
idle very much the same way when entering into PSM by utilizing the Extreme
Low Power (ELP) mode. I.e. idle is entered by setting necessary conditions
in wl1251_ps_set_mode followed by a call to wl1251_ps_elp_sleep.

It seems it is just enough the authorize ELP mode followed by
CMD_DISCONNECT (thanks to Kalle Valo about the idea to use it).
Without disconnect command the chip remains somewhat active and stays
consuming ~20 mA. Idle mode is left by same way than PSM. The wl1251_join
call is used to revert the CMD_DISCONNECT. Without it association to AP
doesn't work when trying second time.

With this patch the interface up but not associated case the battery current
consumption is less than 1 mA higher compared to interface down case.

Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Acked-by: Kalle Valo <kvalo@adurom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2011-04-07 15:34:14 -04:00

1470 lines
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/*
* This file is part of wl1251
*
* Copyright (C) 2008-2009 Nokia Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/firmware.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/crc32.h>
#include <linux/etherdevice.h>
#include <linux/vmalloc.h>
#include <linux/slab.h>
#include "wl1251.h"
#include "wl12xx_80211.h"
#include "reg.h"
#include "io.h"
#include "cmd.h"
#include "event.h"
#include "tx.h"
#include "rx.h"
#include "ps.h"
#include "init.h"
#include "debugfs.h"
#include "boot.h"
void wl1251_enable_interrupts(struct wl1251 *wl)
{
wl->if_ops->enable_irq(wl);
}
void wl1251_disable_interrupts(struct wl1251 *wl)
{
wl->if_ops->disable_irq(wl);
}
static int wl1251_power_off(struct wl1251 *wl)
{
return wl->if_ops->power(wl, false);
}
static int wl1251_power_on(struct wl1251 *wl)
{
return wl->if_ops->power(wl, true);
}
static int wl1251_fetch_firmware(struct wl1251 *wl)
{
const struct firmware *fw;
struct device *dev = wiphy_dev(wl->hw->wiphy);
int ret;
ret = request_firmware(&fw, WL1251_FW_NAME, dev);
if (ret < 0) {
wl1251_error("could not get firmware: %d", ret);
return ret;
}
if (fw->size % 4) {
wl1251_error("firmware size is not multiple of 32 bits: %zu",
fw->size);
ret = -EILSEQ;
goto out;
}
wl->fw_len = fw->size;
wl->fw = vmalloc(wl->fw_len);
if (!wl->fw) {
wl1251_error("could not allocate memory for the firmware");
ret = -ENOMEM;
goto out;
}
memcpy(wl->fw, fw->data, wl->fw_len);
ret = 0;
out:
release_firmware(fw);
return ret;
}
static int wl1251_fetch_nvs(struct wl1251 *wl)
{
const struct firmware *fw;
struct device *dev = wiphy_dev(wl->hw->wiphy);
int ret;
ret = request_firmware(&fw, WL1251_NVS_NAME, dev);
if (ret < 0) {
wl1251_error("could not get nvs file: %d", ret);
return ret;
}
if (fw->size % 4) {
wl1251_error("nvs size is not multiple of 32 bits: %zu",
fw->size);
ret = -EILSEQ;
goto out;
}
wl->nvs_len = fw->size;
wl->nvs = kmemdup(fw->data, wl->nvs_len, GFP_KERNEL);
if (!wl->nvs) {
wl1251_error("could not allocate memory for the nvs file");
ret = -ENOMEM;
goto out;
}
ret = 0;
out:
release_firmware(fw);
return ret;
}
static void wl1251_fw_wakeup(struct wl1251 *wl)
{
u32 elp_reg;
elp_reg = ELPCTRL_WAKE_UP;
wl1251_write_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
elp_reg = wl1251_read_elp(wl, HW_ACCESS_ELP_CTRL_REG_ADDR);
if (!(elp_reg & ELPCTRL_WLAN_READY))
wl1251_warning("WLAN not ready");
}
static int wl1251_chip_wakeup(struct wl1251 *wl)
{
int ret;
ret = wl1251_power_on(wl);
if (ret < 0)
return ret;
msleep(WL1251_POWER_ON_SLEEP);
wl->if_ops->reset(wl);
/* We don't need a real memory partition here, because we only want
* to use the registers at this point. */
wl1251_set_partition(wl,
0x00000000,
0x00000000,
REGISTERS_BASE,
REGISTERS_DOWN_SIZE);
/* ELP module wake up */
wl1251_fw_wakeup(wl);
/* whal_FwCtrl_BootSm() */
/* 0. read chip id from CHIP_ID */
wl->chip_id = wl1251_reg_read32(wl, CHIP_ID_B);
/* 1. check if chip id is valid */
switch (wl->chip_id) {
case CHIP_ID_1251_PG12:
wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG12)",
wl->chip_id);
break;
case CHIP_ID_1251_PG11:
wl1251_debug(DEBUG_BOOT, "chip id 0x%x (1251 PG11)",
wl->chip_id);
break;
case CHIP_ID_1251_PG10:
default:
wl1251_error("unsupported chip id: 0x%x", wl->chip_id);
ret = -ENODEV;
goto out;
}
if (wl->fw == NULL) {
ret = wl1251_fetch_firmware(wl);
if (ret < 0)
goto out;
}
if (wl->nvs == NULL && !wl->use_eeprom) {
/* No NVS from netlink, try to get it from the filesystem */
ret = wl1251_fetch_nvs(wl);
if (ret < 0)
goto out;
}
out:
return ret;
}
#define WL1251_IRQ_LOOP_COUNT 10
static void wl1251_irq_work(struct work_struct *work)
{
u32 intr, ctr = WL1251_IRQ_LOOP_COUNT;
struct wl1251 *wl =
container_of(work, struct wl1251, irq_work);
int ret;
mutex_lock(&wl->mutex);
wl1251_debug(DEBUG_IRQ, "IRQ work");
if (wl->state == WL1251_STATE_OFF)
goto out;
ret = wl1251_ps_elp_wakeup(wl);
if (ret < 0)
goto out;
wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1251_ACX_INTR_ALL);
intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
wl1251_debug(DEBUG_IRQ, "intr: 0x%x", intr);
do {
if (wl->data_path) {
wl->rx_counter = wl1251_mem_read32(
wl, wl->data_path->rx_control_addr);
/* We handle a frmware bug here */
switch ((wl->rx_counter - wl->rx_handled) & 0xf) {
case 0:
wl1251_debug(DEBUG_IRQ,
"RX: FW and host in sync");
intr &= ~WL1251_ACX_INTR_RX0_DATA;
intr &= ~WL1251_ACX_INTR_RX1_DATA;
break;
case 1:
wl1251_debug(DEBUG_IRQ, "RX: FW +1");
intr |= WL1251_ACX_INTR_RX0_DATA;
intr &= ~WL1251_ACX_INTR_RX1_DATA;
break;
case 2:
wl1251_debug(DEBUG_IRQ, "RX: FW +2");
intr |= WL1251_ACX_INTR_RX0_DATA;
intr |= WL1251_ACX_INTR_RX1_DATA;
break;
default:
wl1251_warning(
"RX: FW and host out of sync: %d",
wl->rx_counter - wl->rx_handled);
break;
}
wl->rx_handled = wl->rx_counter;
wl1251_debug(DEBUG_IRQ, "RX counter: %d",
wl->rx_counter);
}
intr &= wl->intr_mask;
if (intr == 0) {
wl1251_debug(DEBUG_IRQ, "INTR is 0");
goto out_sleep;
}
if (intr & WL1251_ACX_INTR_RX0_DATA) {
wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX0_DATA");
wl1251_rx(wl);
}
if (intr & WL1251_ACX_INTR_RX1_DATA) {
wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_RX1_DATA");
wl1251_rx(wl);
}
if (intr & WL1251_ACX_INTR_TX_RESULT) {
wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_TX_RESULT");
wl1251_tx_complete(wl);
}
if (intr & WL1251_ACX_INTR_EVENT_A) {
wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_A");
wl1251_event_handle(wl, 0);
}
if (intr & WL1251_ACX_INTR_EVENT_B) {
wl1251_debug(DEBUG_IRQ, "WL1251_ACX_INTR_EVENT_B");
wl1251_event_handle(wl, 1);
}
if (intr & WL1251_ACX_INTR_INIT_COMPLETE)
wl1251_debug(DEBUG_IRQ,
"WL1251_ACX_INTR_INIT_COMPLETE");
if (--ctr == 0)
break;
intr = wl1251_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
} while (intr);
out_sleep:
wl1251_reg_write32(wl, ACX_REG_INTERRUPT_MASK, ~(wl->intr_mask));
wl1251_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
}
static int wl1251_join(struct wl1251 *wl, u8 bss_type, u8 channel,
u16 beacon_interval, u8 dtim_period)
{
int ret;
ret = wl1251_acx_frame_rates(wl, DEFAULT_HW_GEN_TX_RATE,
DEFAULT_HW_GEN_MODULATION_TYPE,
wl->tx_mgmt_frm_rate,
wl->tx_mgmt_frm_mod);
if (ret < 0)
goto out;
ret = wl1251_cmd_join(wl, bss_type, channel, beacon_interval,
dtim_period);
if (ret < 0)
goto out;
ret = wl1251_event_wait(wl, JOIN_EVENT_COMPLETE_ID, 100);
if (ret < 0)
wl1251_warning("join timeout");
out:
return ret;
}
static void wl1251_filter_work(struct work_struct *work)
{
struct wl1251 *wl =
container_of(work, struct wl1251, filter_work);
int ret;
mutex_lock(&wl->mutex);
if (wl->state == WL1251_STATE_OFF)
goto out;
ret = wl1251_ps_elp_wakeup(wl);
if (ret < 0)
goto out;
ret = wl1251_join(wl, wl->bss_type, wl->channel, wl->beacon_int,
wl->dtim_period);
if (ret < 0)
goto out_sleep;
out_sleep:
wl1251_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
}
static void wl1251_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct wl1251 *wl = hw->priv;
unsigned long flags;
skb_queue_tail(&wl->tx_queue, skb);
/*
* The chip specific setup must run before the first TX packet -
* before that, the tx_work will not be initialized!
*/
ieee80211_queue_work(wl->hw, &wl->tx_work);
/*
* The workqueue is slow to process the tx_queue and we need stop
* the queue here, otherwise the queue will get too long.
*/
if (skb_queue_len(&wl->tx_queue) >= WL1251_TX_QUEUE_HIGH_WATERMARK) {
wl1251_debug(DEBUG_TX, "op_tx: tx_queue full, stop queues");
spin_lock_irqsave(&wl->wl_lock, flags);
ieee80211_stop_queues(wl->hw);
wl->tx_queue_stopped = true;
spin_unlock_irqrestore(&wl->wl_lock, flags);
}
}
static int wl1251_op_start(struct ieee80211_hw *hw)
{
struct wl1251 *wl = hw->priv;
struct wiphy *wiphy = hw->wiphy;
int ret = 0;
wl1251_debug(DEBUG_MAC80211, "mac80211 start");
mutex_lock(&wl->mutex);
if (wl->state != WL1251_STATE_OFF) {
wl1251_error("cannot start because not in off state: %d",
wl->state);
ret = -EBUSY;
goto out;
}
ret = wl1251_chip_wakeup(wl);
if (ret < 0)
goto out;
ret = wl1251_boot(wl);
if (ret < 0)
goto out;
ret = wl1251_hw_init(wl);
if (ret < 0)
goto out;
ret = wl1251_acx_station_id(wl);
if (ret < 0)
goto out;
wl->state = WL1251_STATE_ON;
wl1251_info("firmware booted (%s)", wl->fw_ver);
/* update hw/fw version info in wiphy struct */
wiphy->hw_version = wl->chip_id;
strncpy(wiphy->fw_version, wl->fw_ver, sizeof(wiphy->fw_version));
out:
if (ret < 0)
wl1251_power_off(wl);
mutex_unlock(&wl->mutex);
return ret;
}
static void wl1251_op_stop(struct ieee80211_hw *hw)
{
struct wl1251 *wl = hw->priv;
wl1251_info("down");
wl1251_debug(DEBUG_MAC80211, "mac80211 stop");
mutex_lock(&wl->mutex);
WARN_ON(wl->state != WL1251_STATE_ON);
if (wl->scanning) {
ieee80211_scan_completed(wl->hw, true);
wl->scanning = false;
}
wl->state = WL1251_STATE_OFF;
wl1251_disable_interrupts(wl);
mutex_unlock(&wl->mutex);
cancel_work_sync(&wl->irq_work);
cancel_work_sync(&wl->tx_work);
cancel_work_sync(&wl->filter_work);
mutex_lock(&wl->mutex);
/* let's notify MAC80211 about the remaining pending TX frames */
wl1251_tx_flush(wl);
wl1251_power_off(wl);
memset(wl->bssid, 0, ETH_ALEN);
wl->listen_int = 1;
wl->bss_type = MAX_BSS_TYPE;
wl->data_in_count = 0;
wl->rx_counter = 0;
wl->rx_handled = 0;
wl->rx_current_buffer = 0;
wl->rx_last_id = 0;
wl->next_tx_complete = 0;
wl->elp = false;
wl->station_mode = STATION_ACTIVE_MODE;
wl->tx_queue_stopped = false;
wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
wl->rssi_thold = 0;
wl->channel = WL1251_DEFAULT_CHANNEL;
wl1251_debugfs_reset(wl);
mutex_unlock(&wl->mutex);
}
static int wl1251_op_add_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct wl1251 *wl = hw->priv;
int ret = 0;
wl1251_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
vif->type, vif->addr);
mutex_lock(&wl->mutex);
if (wl->vif) {
ret = -EBUSY;
goto out;
}
wl->vif = vif;
switch (vif->type) {
case NL80211_IFTYPE_STATION:
wl->bss_type = BSS_TYPE_STA_BSS;
break;
case NL80211_IFTYPE_ADHOC:
wl->bss_type = BSS_TYPE_IBSS;
break;
default:
ret = -EOPNOTSUPP;
goto out;
}
if (memcmp(wl->mac_addr, vif->addr, ETH_ALEN)) {
memcpy(wl->mac_addr, vif->addr, ETH_ALEN);
SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
ret = wl1251_acx_station_id(wl);
if (ret < 0)
goto out;
}
out:
mutex_unlock(&wl->mutex);
return ret;
}
static void wl1251_op_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
struct wl1251 *wl = hw->priv;
mutex_lock(&wl->mutex);
wl1251_debug(DEBUG_MAC80211, "mac80211 remove interface");
wl->vif = NULL;
mutex_unlock(&wl->mutex);
}
static int wl1251_build_qos_null_data(struct wl1251 *wl)
{
struct ieee80211_qos_hdr template;
memset(&template, 0, sizeof(template));
memcpy(template.addr1, wl->bssid, ETH_ALEN);
memcpy(template.addr2, wl->mac_addr, ETH_ALEN);
memcpy(template.addr3, wl->bssid, ETH_ALEN);
template.frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA |
IEEE80211_STYPE_QOS_NULLFUNC |
IEEE80211_FCTL_TODS);
/* FIXME: not sure what priority to use here */
template.qos_ctrl = cpu_to_le16(0);
return wl1251_cmd_template_set(wl, CMD_QOS_NULL_DATA, &template,
sizeof(template));
}
static int wl1251_op_config(struct ieee80211_hw *hw, u32 changed)
{
struct wl1251 *wl = hw->priv;
struct ieee80211_conf *conf = &hw->conf;
int channel, ret = 0;
channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
wl1251_debug(DEBUG_MAC80211, "mac80211 config ch %d psm %s power %d",
channel,
conf->flags & IEEE80211_CONF_PS ? "on" : "off",
conf->power_level);
mutex_lock(&wl->mutex);
ret = wl1251_ps_elp_wakeup(wl);
if (ret < 0)
goto out;
if (channel != wl->channel) {
wl->channel = channel;
ret = wl1251_join(wl, wl->bss_type, wl->channel,
wl->beacon_int, wl->dtim_period);
if (ret < 0)
goto out_sleep;
}
if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
wl1251_debug(DEBUG_PSM, "psm enabled");
wl->psm_requested = true;
wl->dtim_period = conf->ps_dtim_period;
ret = wl1251_acx_wr_tbtt_and_dtim(wl, wl->beacon_int,
wl->dtim_period);
/*
* mac80211 enables PSM only if we're already associated.
*/
ret = wl1251_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
if (ret < 0)
goto out_sleep;
} else if (!(conf->flags & IEEE80211_CONF_PS) &&
wl->psm_requested) {
wl1251_debug(DEBUG_PSM, "psm disabled");
wl->psm_requested = false;
if (wl->station_mode != STATION_ACTIVE_MODE) {
ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
if (ret < 0)
goto out_sleep;
}
}
if (changed & IEEE80211_CONF_CHANGE_IDLE) {
if (conf->flags & IEEE80211_CONF_IDLE) {
ret = wl1251_ps_set_mode(wl, STATION_IDLE);
if (ret < 0)
goto out_sleep;
} else {
ret = wl1251_ps_set_mode(wl, STATION_ACTIVE_MODE);
if (ret < 0)
goto out_sleep;
ret = wl1251_join(wl, wl->bss_type, wl->channel,
wl->beacon_int, wl->dtim_period);
if (ret < 0)
goto out_sleep;
}
}
if (conf->power_level != wl->power_level) {
ret = wl1251_acx_tx_power(wl, conf->power_level);
if (ret < 0)
goto out_sleep;
wl->power_level = conf->power_level;
}
out_sleep:
wl1251_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
return ret;
}
#define WL1251_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
FIF_ALLMULTI | \
FIF_FCSFAIL | \
FIF_BCN_PRBRESP_PROMISC | \
FIF_CONTROL | \
FIF_OTHER_BSS)
static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
unsigned int changed,
unsigned int *total,u64 multicast)
{
struct wl1251 *wl = hw->priv;
wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
*total &= WL1251_SUPPORTED_FILTERS;
changed &= WL1251_SUPPORTED_FILTERS;
if (changed == 0)
/* no filters which we support changed */
return;
/* FIXME: wl->rx_config and wl->rx_filter are not protected */
wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
if (*total & FIF_PROMISC_IN_BSS) {
wl->rx_config |= CFG_BSSID_FILTER_EN;
wl->rx_config |= CFG_RX_ALL_GOOD;
}
if (*total & FIF_ALLMULTI)
/*
* CFG_MC_FILTER_EN in rx_config needs to be 0 to receive
* all multicast frames
*/
wl->rx_config &= ~CFG_MC_FILTER_EN;
if (*total & FIF_FCSFAIL)
wl->rx_filter |= CFG_RX_FCS_ERROR;
if (*total & FIF_BCN_PRBRESP_PROMISC) {
wl->rx_config &= ~CFG_BSSID_FILTER_EN;
wl->rx_config &= ~CFG_SSID_FILTER_EN;
}
if (*total & FIF_CONTROL)
wl->rx_filter |= CFG_RX_CTL_EN;
if (*total & FIF_OTHER_BSS)
wl->rx_filter &= ~CFG_BSSID_FILTER_EN;
/*
* FIXME: workqueues need to be properly cancelled on stop(), for
* now let's just disable changing the filter settings. They will
* be updated any on config().
*/
/* schedule_work(&wl->filter_work); */
}
/* HW encryption */
static int wl1251_set_key_type(struct wl1251 *wl,
struct wl1251_cmd_set_keys *key,
enum set_key_cmd cmd,
struct ieee80211_key_conf *mac80211_key,
const u8 *addr)
{
switch (mac80211_key->cipher) {
case WLAN_CIPHER_SUITE_WEP40:
case WLAN_CIPHER_SUITE_WEP104:
if (is_broadcast_ether_addr(addr))
key->key_type = KEY_WEP_DEFAULT;
else
key->key_type = KEY_WEP_ADDR;
mac80211_key->hw_key_idx = mac80211_key->keyidx;
break;
case WLAN_CIPHER_SUITE_TKIP:
if (is_broadcast_ether_addr(addr))
key->key_type = KEY_TKIP_MIC_GROUP;
else
key->key_type = KEY_TKIP_MIC_PAIRWISE;
mac80211_key->hw_key_idx = mac80211_key->keyidx;
break;
case WLAN_CIPHER_SUITE_CCMP:
if (is_broadcast_ether_addr(addr))
key->key_type = KEY_AES_GROUP;
else
key->key_type = KEY_AES_PAIRWISE;
mac80211_key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
break;
default:
wl1251_error("Unknown key cipher 0x%x", mac80211_key->cipher);
return -EOPNOTSUPP;
}
return 0;
}
static int wl1251_op_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
struct ieee80211_key_conf *key)
{
struct wl1251 *wl = hw->priv;
struct wl1251_cmd_set_keys *wl_cmd;
const u8 *addr;
int ret;
static const u8 bcast_addr[ETH_ALEN] =
{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
wl1251_debug(DEBUG_MAC80211, "mac80211 set key");
wl_cmd = kzalloc(sizeof(*wl_cmd), GFP_KERNEL);
if (!wl_cmd) {
ret = -ENOMEM;
goto out;
}
addr = sta ? sta->addr : bcast_addr;
wl1251_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
wl1251_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
wl1251_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
key->cipher, key->keyidx, key->keylen, key->flags);
wl1251_dump(DEBUG_CRYPT, "KEY: ", key->key, key->keylen);
if (is_zero_ether_addr(addr)) {
/* We dont support TX only encryption */
ret = -EOPNOTSUPP;
goto out;
}
mutex_lock(&wl->mutex);
ret = wl1251_ps_elp_wakeup(wl);
if (ret < 0)
goto out_unlock;
switch (cmd) {
case SET_KEY:
wl_cmd->key_action = KEY_ADD_OR_REPLACE;
break;
case DISABLE_KEY:
wl_cmd->key_action = KEY_REMOVE;
break;
default:
wl1251_error("Unsupported key cmd 0x%x", cmd);
break;
}
ret = wl1251_set_key_type(wl, wl_cmd, cmd, key, addr);
if (ret < 0) {
wl1251_error("Set KEY type failed");
goto out_sleep;
}
if (wl_cmd->key_type != KEY_WEP_DEFAULT)
memcpy(wl_cmd->addr, addr, ETH_ALEN);
if ((wl_cmd->key_type == KEY_TKIP_MIC_GROUP) ||
(wl_cmd->key_type == KEY_TKIP_MIC_PAIRWISE)) {
/*
* We get the key in the following form:
* TKIP (16 bytes) - TX MIC (8 bytes) - RX MIC (8 bytes)
* but the target is expecting:
* TKIP - RX MIC - TX MIC
*/
memcpy(wl_cmd->key, key->key, 16);
memcpy(wl_cmd->key + 16, key->key + 24, 8);
memcpy(wl_cmd->key + 24, key->key + 16, 8);
} else {
memcpy(wl_cmd->key, key->key, key->keylen);
}
wl_cmd->key_size = key->keylen;
wl_cmd->id = key->keyidx;
wl_cmd->ssid_profile = 0;
wl1251_dump(DEBUG_CRYPT, "TARGET KEY: ", wl_cmd, sizeof(*wl_cmd));
ret = wl1251_cmd_send(wl, CMD_SET_KEYS, wl_cmd, sizeof(*wl_cmd));
if (ret < 0) {
wl1251_warning("could not set keys");
goto out_sleep;
}
out_sleep:
wl1251_ps_elp_sleep(wl);
out_unlock:
mutex_unlock(&wl->mutex);
out:
kfree(wl_cmd);
return ret;
}
static int wl1251_op_hw_scan(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct cfg80211_scan_request *req)
{
struct wl1251 *wl = hw->priv;
struct sk_buff *skb;
size_t ssid_len = 0;
u8 *ssid = NULL;
int ret;
wl1251_debug(DEBUG_MAC80211, "mac80211 hw scan");
if (req->n_ssids) {
ssid = req->ssids[0].ssid;
ssid_len = req->ssids[0].ssid_len;
}
mutex_lock(&wl->mutex);
if (wl->scanning) {
wl1251_debug(DEBUG_SCAN, "scan already in progress");
ret = -EINVAL;
goto out;
}
ret = wl1251_ps_elp_wakeup(wl);
if (ret < 0)
goto out;
skb = ieee80211_probereq_get(wl->hw, wl->vif, ssid, ssid_len,
req->ie, req->ie_len);
if (!skb) {
ret = -ENOMEM;
goto out;
}
ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
skb->len);
dev_kfree_skb(skb);
if (ret < 0)
goto out_sleep;
ret = wl1251_cmd_trigger_scan_to(wl, 0);
if (ret < 0)
goto out_sleep;
wl->scanning = true;
ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
req->n_channels, WL1251_SCAN_NUM_PROBES);
if (ret < 0) {
wl->scanning = false;
goto out_sleep;
}
out_sleep:
wl1251_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
return ret;
}
static int wl1251_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
{
struct wl1251 *wl = hw->priv;
int ret;
mutex_lock(&wl->mutex);
ret = wl1251_ps_elp_wakeup(wl);
if (ret < 0)
goto out;
ret = wl1251_acx_rts_threshold(wl, (u16) value);
if (ret < 0)
wl1251_warning("wl1251_op_set_rts_threshold failed: %d", ret);
wl1251_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
return ret;
}
static void wl1251_op_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss_conf,
u32 changed)
{
struct wl1251 *wl = hw->priv;
struct sk_buff *beacon, *skb;
int ret;
wl1251_debug(DEBUG_MAC80211, "mac80211 bss info changed");
mutex_lock(&wl->mutex);
ret = wl1251_ps_elp_wakeup(wl);
if (ret < 0)
goto out;
if (changed & BSS_CHANGED_CQM) {
ret = wl1251_acx_low_rssi(wl, bss_conf->cqm_rssi_thold,
WL1251_DEFAULT_LOW_RSSI_WEIGHT,
WL1251_DEFAULT_LOW_RSSI_DEPTH,
WL1251_ACX_LOW_RSSI_TYPE_EDGE);
if (ret < 0)
goto out;
wl->rssi_thold = bss_conf->cqm_rssi_thold;
}
if (changed & BSS_CHANGED_BSSID) {
memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
skb = ieee80211_nullfunc_get(wl->hw, wl->vif);
if (!skb)
goto out_sleep;
ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA,
skb->data, skb->len);
dev_kfree_skb(skb);
if (ret < 0)
goto out_sleep;
ret = wl1251_build_qos_null_data(wl);
if (ret < 0)
goto out;
if (wl->bss_type != BSS_TYPE_IBSS) {
ret = wl1251_join(wl, wl->bss_type, wl->channel,
wl->beacon_int, wl->dtim_period);
if (ret < 0)
goto out_sleep;
}
}
if (changed & BSS_CHANGED_ASSOC) {
if (bss_conf->assoc) {
wl->beacon_int = bss_conf->beacon_int;
skb = ieee80211_pspoll_get(wl->hw, wl->vif);
if (!skb)
goto out_sleep;
ret = wl1251_cmd_template_set(wl, CMD_PS_POLL,
skb->data,
skb->len);
dev_kfree_skb(skb);
if (ret < 0)
goto out_sleep;
ret = wl1251_acx_aid(wl, bss_conf->aid);
if (ret < 0)
goto out_sleep;
} else {
/* use defaults when not associated */
wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
}
}
if (changed & BSS_CHANGED_ERP_SLOT) {
if (bss_conf->use_short_slot)
ret = wl1251_acx_slot(wl, SLOT_TIME_SHORT);
else
ret = wl1251_acx_slot(wl, SLOT_TIME_LONG);
if (ret < 0) {
wl1251_warning("Set slot time failed %d", ret);
goto out_sleep;
}
}
if (changed & BSS_CHANGED_ERP_PREAMBLE) {
if (bss_conf->use_short_preamble)
wl1251_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
else
wl1251_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
}
if (changed & BSS_CHANGED_ERP_CTS_PROT) {
if (bss_conf->use_cts_prot)
ret = wl1251_acx_cts_protect(wl, CTSPROTECT_ENABLE);
else
ret = wl1251_acx_cts_protect(wl, CTSPROTECT_DISABLE);
if (ret < 0) {
wl1251_warning("Set ctsprotect failed %d", ret);
goto out_sleep;
}
}
if (changed & BSS_CHANGED_BEACON) {
beacon = ieee80211_beacon_get(hw, vif);
if (!beacon)
goto out_sleep;
ret = wl1251_cmd_template_set(wl, CMD_BEACON, beacon->data,
beacon->len);
if (ret < 0) {
dev_kfree_skb(beacon);
goto out_sleep;
}
ret = wl1251_cmd_template_set(wl, CMD_PROBE_RESP, beacon->data,
beacon->len);
dev_kfree_skb(beacon);
if (ret < 0)
goto out_sleep;
ret = wl1251_join(wl, wl->bss_type, wl->beacon_int,
wl->channel, wl->dtim_period);
if (ret < 0)
goto out_sleep;
}
out_sleep:
wl1251_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
}
/* can't be const, mac80211 writes to this */
static struct ieee80211_rate wl1251_rates[] = {
{ .bitrate = 10,
.hw_value = 0x1,
.hw_value_short = 0x1, },
{ .bitrate = 20,
.hw_value = 0x2,
.hw_value_short = 0x2,
.flags = IEEE80211_RATE_SHORT_PREAMBLE },
{ .bitrate = 55,
.hw_value = 0x4,
.hw_value_short = 0x4,
.flags = IEEE80211_RATE_SHORT_PREAMBLE },
{ .bitrate = 110,
.hw_value = 0x20,
.hw_value_short = 0x20,
.flags = IEEE80211_RATE_SHORT_PREAMBLE },
{ .bitrate = 60,
.hw_value = 0x8,
.hw_value_short = 0x8, },
{ .bitrate = 90,
.hw_value = 0x10,
.hw_value_short = 0x10, },
{ .bitrate = 120,
.hw_value = 0x40,
.hw_value_short = 0x40, },
{ .bitrate = 180,
.hw_value = 0x80,
.hw_value_short = 0x80, },
{ .bitrate = 240,
.hw_value = 0x200,
.hw_value_short = 0x200, },
{ .bitrate = 360,
.hw_value = 0x400,
.hw_value_short = 0x400, },
{ .bitrate = 480,
.hw_value = 0x800,
.hw_value_short = 0x800, },
{ .bitrate = 540,
.hw_value = 0x1000,
.hw_value_short = 0x1000, },
};
/* can't be const, mac80211 writes to this */
static struct ieee80211_channel wl1251_channels[] = {
{ .hw_value = 1, .center_freq = 2412},
{ .hw_value = 2, .center_freq = 2417},
{ .hw_value = 3, .center_freq = 2422},
{ .hw_value = 4, .center_freq = 2427},
{ .hw_value = 5, .center_freq = 2432},
{ .hw_value = 6, .center_freq = 2437},
{ .hw_value = 7, .center_freq = 2442},
{ .hw_value = 8, .center_freq = 2447},
{ .hw_value = 9, .center_freq = 2452},
{ .hw_value = 10, .center_freq = 2457},
{ .hw_value = 11, .center_freq = 2462},
{ .hw_value = 12, .center_freq = 2467},
{ .hw_value = 13, .center_freq = 2472},
};
static int wl1251_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
const struct ieee80211_tx_queue_params *params)
{
enum wl1251_acx_ps_scheme ps_scheme;
struct wl1251 *wl = hw->priv;
int ret;
mutex_lock(&wl->mutex);
wl1251_debug(DEBUG_MAC80211, "mac80211 conf tx %d", queue);
ret = wl1251_ps_elp_wakeup(wl);
if (ret < 0)
goto out;
/* mac80211 uses units of 32 usec */
ret = wl1251_acx_ac_cfg(wl, wl1251_tx_get_queue(queue),
params->cw_min, params->cw_max,
params->aifs, params->txop * 32);
if (ret < 0)
goto out_sleep;
if (params->uapsd)
ps_scheme = WL1251_ACX_PS_SCHEME_UPSD_TRIGGER;
else
ps_scheme = WL1251_ACX_PS_SCHEME_LEGACY;
ret = wl1251_acx_tid_cfg(wl, wl1251_tx_get_queue(queue),
CHANNEL_TYPE_EDCF,
wl1251_tx_get_queue(queue), ps_scheme,
WL1251_ACX_ACK_POLICY_LEGACY);
if (ret < 0)
goto out_sleep;
out_sleep:
wl1251_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
return ret;
}
static int wl1251_op_get_survey(struct ieee80211_hw *hw, int idx,
struct survey_info *survey)
{
struct wl1251 *wl = hw->priv;
struct ieee80211_conf *conf = &hw->conf;
if (idx != 0)
return -ENOENT;
survey->channel = conf->channel;
survey->filled = SURVEY_INFO_NOISE_DBM;
survey->noise = wl->noise;
return 0;
}
/* can't be const, mac80211 writes to this */
static struct ieee80211_supported_band wl1251_band_2ghz = {
.channels = wl1251_channels,
.n_channels = ARRAY_SIZE(wl1251_channels),
.bitrates = wl1251_rates,
.n_bitrates = ARRAY_SIZE(wl1251_rates),
};
static const struct ieee80211_ops wl1251_ops = {
.start = wl1251_op_start,
.stop = wl1251_op_stop,
.add_interface = wl1251_op_add_interface,
.remove_interface = wl1251_op_remove_interface,
.config = wl1251_op_config,
.configure_filter = wl1251_op_configure_filter,
.tx = wl1251_op_tx,
.set_key = wl1251_op_set_key,
.hw_scan = wl1251_op_hw_scan,
.bss_info_changed = wl1251_op_bss_info_changed,
.set_rts_threshold = wl1251_op_set_rts_threshold,
.conf_tx = wl1251_op_conf_tx,
.get_survey = wl1251_op_get_survey,
};
static int wl1251_read_eeprom_byte(struct wl1251 *wl, off_t offset, u8 *data)
{
unsigned long timeout;
wl1251_reg_write32(wl, EE_ADDR, offset);
wl1251_reg_write32(wl, EE_CTL, EE_CTL_READ);
/* EE_CTL_READ clears when data is ready */
timeout = jiffies + msecs_to_jiffies(100);
while (1) {
if (!(wl1251_reg_read32(wl, EE_CTL) & EE_CTL_READ))
break;
if (time_after(jiffies, timeout))
return -ETIMEDOUT;
msleep(1);
}
*data = wl1251_reg_read32(wl, EE_DATA);
return 0;
}
static int wl1251_read_eeprom(struct wl1251 *wl, off_t offset,
u8 *data, size_t len)
{
size_t i;
int ret;
wl1251_reg_write32(wl, EE_START, 0);
for (i = 0; i < len; i++) {
ret = wl1251_read_eeprom_byte(wl, offset + i, &data[i]);
if (ret < 0)
return ret;
}
return 0;
}
static int wl1251_read_eeprom_mac(struct wl1251 *wl)
{
u8 mac[ETH_ALEN];
int i, ret;
wl1251_set_partition(wl, 0, 0, REGISTERS_BASE, REGISTERS_DOWN_SIZE);
ret = wl1251_read_eeprom(wl, 0x1c, mac, sizeof(mac));
if (ret < 0) {
wl1251_warning("failed to read MAC address from EEPROM");
return ret;
}
/* MAC is stored in reverse order */
for (i = 0; i < ETH_ALEN; i++)
wl->mac_addr[i] = mac[ETH_ALEN - i - 1];
return 0;
}
static int wl1251_register_hw(struct wl1251 *wl)
{
int ret;
if (wl->mac80211_registered)
return 0;
SET_IEEE80211_PERM_ADDR(wl->hw, wl->mac_addr);
ret = ieee80211_register_hw(wl->hw);
if (ret < 0) {
wl1251_error("unable to register mac80211 hw: %d", ret);
return ret;
}
wl->mac80211_registered = true;
wl1251_notice("loaded");
return 0;
}
int wl1251_init_ieee80211(struct wl1251 *wl)
{
int ret;
/* The tx descriptor buffer and the TKIP space */
wl->hw->extra_tx_headroom = sizeof(struct tx_double_buffer_desc)
+ WL1251_TKIP_IV_SPACE;
/* unit us */
/* FIXME: find a proper value */
wl->hw->channel_change_time = 10000;
wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
IEEE80211_HW_SUPPORTS_PS |
IEEE80211_HW_BEACON_FILTER |
IEEE80211_HW_SUPPORTS_UAPSD |
IEEE80211_HW_SUPPORTS_CQM_RSSI;
wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
BIT(NL80211_IFTYPE_ADHOC);
wl->hw->wiphy->max_scan_ssids = 1;
wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1251_band_2ghz;
wl->hw->queues = 4;
if (wl->use_eeprom)
wl1251_read_eeprom_mac(wl);
ret = wl1251_register_hw(wl);
if (ret)
goto out;
wl1251_debugfs_init(wl);
wl1251_notice("initialized");
ret = 0;
out:
return ret;
}
EXPORT_SYMBOL_GPL(wl1251_init_ieee80211);
struct ieee80211_hw *wl1251_alloc_hw(void)
{
struct ieee80211_hw *hw;
struct wl1251 *wl;
int i;
static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
hw = ieee80211_alloc_hw(sizeof(*wl), &wl1251_ops);
if (!hw) {
wl1251_error("could not alloc ieee80211_hw");
return ERR_PTR(-ENOMEM);
}
wl = hw->priv;
memset(wl, 0, sizeof(*wl));
wl->hw = hw;
wl->data_in_count = 0;
skb_queue_head_init(&wl->tx_queue);
INIT_WORK(&wl->filter_work, wl1251_filter_work);
INIT_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
wl->channel = WL1251_DEFAULT_CHANNEL;
wl->scanning = false;
wl->default_key = 0;
wl->listen_int = 1;
wl->rx_counter = 0;
wl->rx_handled = 0;
wl->rx_current_buffer = 0;
wl->rx_last_id = 0;
wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
wl->elp = false;
wl->station_mode = STATION_ACTIVE_MODE;
wl->psm_requested = false;
wl->tx_queue_stopped = false;
wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
wl->rssi_thold = 0;
wl->beacon_int = WL1251_DEFAULT_BEACON_INT;
wl->dtim_period = WL1251_DEFAULT_DTIM_PERIOD;
wl->vif = NULL;
for (i = 0; i < FW_TX_CMPLT_BLOCK_SIZE; i++)
wl->tx_frames[i] = NULL;
wl->next_tx_complete = 0;
INIT_WORK(&wl->irq_work, wl1251_irq_work);
INIT_WORK(&wl->tx_work, wl1251_tx_work);
/*
* In case our MAC address is not correctly set,
* we use a random but Nokia MAC.
*/
memcpy(wl->mac_addr, nokia_oui, 3);
get_random_bytes(wl->mac_addr + 3, 3);
wl->state = WL1251_STATE_OFF;
mutex_init(&wl->mutex);
wl->tx_mgmt_frm_rate = DEFAULT_HW_GEN_TX_RATE;
wl->tx_mgmt_frm_mod = DEFAULT_HW_GEN_MODULATION_TYPE;
wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
if (!wl->rx_descriptor) {
wl1251_error("could not allocate memory for rx descriptor");
ieee80211_free_hw(hw);
return ERR_PTR(-ENOMEM);
}
return hw;
}
EXPORT_SYMBOL_GPL(wl1251_alloc_hw);
int wl1251_free_hw(struct wl1251 *wl)
{
ieee80211_unregister_hw(wl->hw);
wl1251_debugfs_exit(wl);
kfree(wl->target_mem_map);
kfree(wl->data_path);
vfree(wl->fw);
wl->fw = NULL;
kfree(wl->nvs);
wl->nvs = NULL;
kfree(wl->rx_descriptor);
wl->rx_descriptor = NULL;
ieee80211_free_hw(wl->hw);
return 0;
}
EXPORT_SYMBOL_GPL(wl1251_free_hw);
MODULE_DESCRIPTION("TI wl1251 Wireles LAN Driver Core");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
MODULE_FIRMWARE(WL1251_FW_NAME);
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