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ubuntu-linux-kernel/drivers/net/wireless/ti/wl1251/main.c

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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 <linux/netdevice.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;
/*
* Join command applies filters, and if we are not associated,
* BSSID filter must be disabled for association to work.
*/
if (is_zero_ether_addr(wl->bssid))
wl->rx_config &= ~CFG_BSSID_FILTER_EN;
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_op_tx(struct ieee80211_hw *hw,
struct ieee80211_tx_control *control,
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) {
struct cfg80211_scan_info info = {
.aborted = true,
};
ieee80211_scan_completed(wl->hw, &info);
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_delayed_work_sync(&wl->elp_work);
mutex_lock(&wl->mutex);
/* let's notify MAC80211 about the remaining pending TX frames */
wl1251_tx_flush(wl);
wl1251_power_off(wl);
eth_zero_addr(wl->bssid);
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->psm_entry_retry = 0;
wl->tx_queue_stopped = false;
wl->power_level = WL1251_DEFAULT_POWER_LEVEL;
wl->rssi_thold = 0;
wl->channel = WL1251_DEFAULT_CHANNEL;
wl->monitor_present = false;
wl->joined = false;
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;
vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
IEEE80211_VIF_SUPPORTS_UAPSD |
IEEE80211_VIF_SUPPORTS_CQM_RSSI;
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 (!ether_addr_equal_unaligned(wl->mac_addr, vif->addr)) {
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;
eth_zero_addr(wl->bssid);
mutex_unlock(&wl->mutex);
}
static int wl1251_build_null_data(struct wl1251 *wl)
{
struct sk_buff *skb = NULL;
int size;
void *ptr;
int ret = -ENOMEM;
if (wl->bss_type == BSS_TYPE_IBSS) {
size = sizeof(struct wl12xx_null_data_template);
ptr = NULL;
} else {
skb = ieee80211_nullfunc_get(wl->hw, wl->vif, false);
if (!skb)
goto out;
size = skb->len;
ptr = skb->data;
}
ret = wl1251_cmd_template_set(wl, CMD_NULL_DATA, ptr, size);
out:
dev_kfree_skb(skb);
if (ret)
wl1251_warning("cmd buld null data failed: %d", ret);
return ret;
}
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 bool wl1251_can_do_pm(struct ieee80211_conf *conf, struct wl1251 *wl)
{
return (conf->flags & IEEE80211_CONF_PS) && !wl->monitor_present;
}
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->chandef.chan->center_freq);
wl1251_debug(DEBUG_MAC80211,
"mac80211 config ch %d monitor %s psm %s power %d",
channel,
conf->flags & IEEE80211_CONF_MONITOR ? "on" : "off",
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 (changed & IEEE80211_CONF_CHANGE_MONITOR) {
u32 mode;
if (conf->flags & IEEE80211_CONF_MONITOR) {
wl->monitor_present = true;
mode = DF_SNIFF_MODE_ENABLE | DF_ENCRYPTION_DISABLE;
} else {
wl->monitor_present = false;
mode = 0;
}
ret = wl1251_acx_feature_cfg(wl, mode);
if (ret < 0)
goto out_sleep;
}
if (channel != wl->channel) {
wl->channel = channel;
/*
* Use ENABLE_RX command for channel switching when no
* interface is present (monitor mode only).
* This leaves the tx path disabled in firmware, whereas
* the usual JOIN command seems to transmit some frames
* at firmware level.
*/
if (wl->vif == NULL) {
wl->joined = false;
ret = wl1251_cmd_data_path_rx(wl, wl->channel, 1);
} else {
ret = wl1251_join(wl, wl->bss_type, wl->channel,
wl->beacon_int, wl->dtim_period);
}
if (ret < 0)
goto out_sleep;
}
if (wl1251_can_do_pm(conf, wl) && !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 (!wl1251_can_do_pm(conf, wl) && 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 && !wl->scanning) {
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;
}
struct wl1251_filter_params {
bool enabled;
int mc_list_length;
u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
};
static u64 wl1251_op_prepare_multicast(struct ieee80211_hw *hw,
struct netdev_hw_addr_list *mc_list)
{
struct wl1251_filter_params *fp;
struct netdev_hw_addr *ha;
struct wl1251 *wl = hw->priv;
if (unlikely(wl->state == WL1251_STATE_OFF))
return 0;
fp = kzalloc(sizeof(*fp), GFP_ATOMIC);
if (!fp) {
wl1251_error("Out of memory setting filters.");
return 0;
}
/* update multicast filtering parameters */
fp->mc_list_length = 0;
if (netdev_hw_addr_list_count(mc_list) > ACX_MC_ADDRESS_GROUP_MAX) {
fp->enabled = false;
} else {
fp->enabled = true;
netdev_hw_addr_list_for_each(ha, mc_list) {
memcpy(fp->mc_list[fp->mc_list_length],
ha->addr, ETH_ALEN);
fp->mc_list_length++;
}
}
return (u64)(unsigned long)fp;
}
#define WL1251_SUPPORTED_FILTERS (FIF_ALLMULTI | \
FIF_FCSFAIL | \
FIF_BCN_PRBRESP_PROMISC | \
FIF_CONTROL | \
FIF_OTHER_BSS | \
FIF_PROBE_REQ)
static void wl1251_op_configure_filter(struct ieee80211_hw *hw,
unsigned int changed,
unsigned int *total, u64 multicast)
{
struct wl1251_filter_params *fp = (void *)(unsigned long)multicast;
struct wl1251 *wl = hw->priv;
int ret;
wl1251_debug(DEBUG_MAC80211, "mac80211 configure filter");
*total &= WL1251_SUPPORTED_FILTERS;
changed &= WL1251_SUPPORTED_FILTERS;
if (changed == 0) {
/* no filters which we support changed */
kfree(fp);
return;
}
mutex_lock(&wl->mutex);
wl->rx_config = WL1251_DEFAULT_RX_CONFIG;
wl->rx_filter = WL1251_DEFAULT_RX_FILTER;
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 || is_zero_ether_addr(wl->bssid))
wl->rx_config &= ~CFG_BSSID_FILTER_EN;
if (*total & FIF_PROBE_REQ)
wl->rx_filter |= CFG_RX_PREQ_EN;
if (wl->state == WL1251_STATE_OFF)
goto out;
ret = wl1251_ps_elp_wakeup(wl);
if (ret < 0)
goto out;
if (*total & FIF_ALLMULTI)
ret = wl1251_acx_group_address_tbl(wl, false, NULL, 0);
else if (fp)
ret = wl1251_acx_group_address_tbl(wl, fp->enabled,
fp->mc_list,
fp->mc_list_length);
if (ret < 0)
goto out;
/* send filters to firmware */
wl1251_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
wl1251_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
kfree(fp);
}
/* 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);
switch (cmd) {
case SET_KEY:
if (wl->monitor_present) {
ret = -EOPNOTSUPP;
goto out_unlock;
}
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_ps_elp_wakeup(wl);
if (ret < 0)
goto out_unlock;
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 ieee80211_scan_request *hw_req)
{
struct cfg80211_scan_request *req = &hw_req->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;
if (hw->conf.flags & IEEE80211_CONF_IDLE) {
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;
}
skb = ieee80211_probereq_get(wl->hw, wl->vif->addr, ssid, ssid_len,
req->ie_len);
if (!skb) {
ret = -ENOMEM;
goto out_idle;
}
if (req->ie_len)
skb_put_data(skb, req->ie, req->ie_len);
ret = wl1251_cmd_template_set(wl, CMD_PROBE_REQ, skb->data,
skb->len);
dev_kfree_skb(skb);
if (ret < 0)
goto out_idle;
ret = wl1251_cmd_trigger_scan_to(wl, 0);
if (ret < 0)
goto out_idle;
wl->scanning = true;
ret = wl1251_cmd_scan(wl, ssid, ssid_len, req->channels,
req->n_channels, WL1251_SCAN_NUM_PROBES);
if (ret < 0) {
wl1251_debug(DEBUG_SCAN, "scan failed %d", ret);
wl->scanning = false;
goto out_idle;
}
goto out_sleep;
out_idle:
if (hw->conf.flags & IEEE80211_CONF_IDLE)
ret = wl1251_ps_set_mode(wl, STATION_IDLE);
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;
bool enable;
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) &&
memcmp(wl->bssid, bss_conf->bssid, ETH_ALEN)) {
memcpy(wl->bssid, bss_conf->bssid, ETH_ALEN);
if (!is_zero_ether_addr(wl->bssid)) {
ret = wl1251_build_null_data(wl);
if (ret < 0)
goto out_sleep;
ret = wl1251_build_qos_null_data(wl);
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 (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_ARP_FILTER) {
__be32 addr = bss_conf->arp_addr_list[0];
WARN_ON(wl->bss_type != BSS_TYPE_STA_BSS);
enable = bss_conf->arp_addr_cnt == 1 && bss_conf->assoc;
wl1251_acx_arp_ip_filter(wl, enable, addr);
if (ret < 0)
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->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);
}
/* 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,
struct ieee80211_vif *vif, 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->chandef.chan;
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,
.prepare_multicast = wl1251_op_prepare_multicast,
.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 */
ieee80211_hw_set(wl->hw, SIGNAL_DBM);
ieee80211_hw_set(wl->hw, SUPPORTS_PS);
wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
BIT(NL80211_IFTYPE_ADHOC);
wl->hw->wiphy->max_scan_ssids = 1;
wl->hw->wiphy->bands[NL80211_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_DELAYED_WORK(&wl->elp_work, wl1251_elp_work);
wl->channel = WL1251_DEFAULT_CHANNEL;
wl->monitor_present = false;
wl->joined = false;
wl->scanning = false;
wl->bss_type = MAX_BSS_TYPE;
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->psm_entry_retry = 0;
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);
spin_lock_init(&wl->wl_lock);
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 Wireless LAN Driver Core");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Kalle Valo <kvalo@adurom.com>");
MODULE_FIRMWARE(WL1251_FW_NAME);
MODULE_FIRMWARE(WL1251_NVS_NAME);
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