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linux/drivers/net/wireless/wl12xx/wl1271_main.c

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/*
* This file is part of wl1271
*
* Copyright (C) 2008-2009 Nokia Corporation
*
* Contact: Luciano Coelho <luciano.coelho@nokia.com>
*
* 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/platform_device.h>
#include <linux/interrupt.h>
#include <linux/firmware.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/spi/spi.h>
#include <linux/crc32.h>
#include <linux/etherdevice.h>
#include <linux/spi/wl12xx.h>
#include "wl1271.h"
#include "wl12xx_80211.h"
#include "wl1271_reg.h"
#include "wl1271_spi.h"
#include "wl1271_event.h"
#include "wl1271_tx.h"
#include "wl1271_rx.h"
#include "wl1271_ps.h"
#include "wl1271_init.h"
#include "wl1271_debugfs.h"
#include "wl1271_cmd.h"
#include "wl1271_boot.h"
static int wl1271_plt_init(struct wl1271 *wl)
{
int ret;
ret = wl1271_acx_init_mem_config(wl);
if (ret < 0)
return ret;
ret = wl1271_cmd_data_path(wl, wl->channel, 1);
if (ret < 0)
return ret;
return 0;
}
static void wl1271_disable_interrupts(struct wl1271 *wl)
{
disable_irq(wl->irq);
}
static void wl1271_power_off(struct wl1271 *wl)
{
wl->set_power(false);
}
static void wl1271_power_on(struct wl1271 *wl)
{
wl->set_power(true);
}
static void wl1271_fw_status(struct wl1271 *wl, struct wl1271_fw_status *status)
{
u32 total = 0;
int i;
/*
* FIXME: Reading the FW status directly from the registers seems to
* be the right thing to do, but it doesn't work. And in the
* reference driver, there is a workaround called
* USE_SDIO_24M_WORKAROUND, which reads the status from memory
* instead, so we do the same here.
*/
wl1271_spi_mem_read(wl, STATUS_MEM_ADDRESS, status, sizeof(*status));
wl1271_debug(DEBUG_IRQ, "intr: 0x%x (fw_rx_counter = %d, "
"drv_rx_counter = %d, tx_results_counter = %d)",
status->intr,
status->fw_rx_counter,
status->drv_rx_counter,
status->tx_results_counter);
/* update number of available TX blocks */
for (i = 0; i < NUM_TX_QUEUES; i++) {
u32 cnt = status->tx_released_blks[i] - wl->tx_blocks_freed[i];
wl->tx_blocks_freed[i] = status->tx_released_blks[i];
wl->tx_blocks_available += cnt;
total += cnt;
}
/* if more blocks are available now, schedule some tx work */
if (total && !skb_queue_empty(&wl->tx_queue))
ieee80211_queue_work(wl->hw, &wl->tx_work);
/* update the host-chipset time offset */
wl->time_offset = jiffies_to_usecs(jiffies) - status->fw_localtime;
}
#define WL1271_IRQ_MAX_LOOPS 10
static void wl1271_irq_work(struct work_struct *work)
{
u32 intr, ctr = WL1271_IRQ_MAX_LOOPS;
int ret;
struct wl1271 *wl =
container_of(work, struct wl1271, irq_work);
mutex_lock(&wl->mutex);
wl1271_debug(DEBUG_IRQ, "IRQ work");
if (wl->state == WL1271_STATE_OFF)
goto out;
ret = wl1271_ps_elp_wakeup(wl, true);
if (ret < 0)
goto out;
wl1271_reg_write32(wl, ACX_REG_INTERRUPT_MASK, WL1271_ACX_INTR_ALL);
intr = wl1271_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
if (!intr) {
wl1271_debug(DEBUG_IRQ, "Zero interrupt received.");
goto out_sleep;
}
intr &= WL1271_INTR_MASK;
do {
wl1271_fw_status(wl, wl->fw_status);
if (intr & (WL1271_ACX_INTR_EVENT_A |
WL1271_ACX_INTR_EVENT_B)) {
wl1271_debug(DEBUG_IRQ,
"WL1271_ACX_INTR_EVENT (0x%x)", intr);
if (intr & WL1271_ACX_INTR_EVENT_A)
wl1271_event_handle(wl, 0);
else
wl1271_event_handle(wl, 1);
}
if (intr & WL1271_ACX_INTR_INIT_COMPLETE)
wl1271_debug(DEBUG_IRQ,
"WL1271_ACX_INTR_INIT_COMPLETE");
if (intr & WL1271_ACX_INTR_HW_AVAILABLE)
wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_HW_AVAILABLE");
if (intr & WL1271_ACX_INTR_DATA) {
u8 tx_res_cnt = wl->fw_status->tx_results_counter -
wl->tx_results_count;
wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_DATA");
/* check for tx results */
if (tx_res_cnt)
wl1271_tx_complete(wl, tx_res_cnt);
wl1271_rx(wl, wl->fw_status);
}
intr = wl1271_reg_read32(wl, ACX_REG_INTERRUPT_CLEAR);
intr &= WL1271_INTR_MASK;
} while (intr && --ctr);
out_sleep:
wl1271_reg_write32(wl, ACX_REG_INTERRUPT_MASK,
WL1271_ACX_INTR_ALL & ~(WL1271_INTR_MASK));
wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
}
static irqreturn_t wl1271_irq(int irq, void *cookie)
{
struct wl1271 *wl;
unsigned long flags;
wl1271_debug(DEBUG_IRQ, "IRQ");
wl = cookie;
/* complete the ELP completion */
spin_lock_irqsave(&wl->wl_lock, flags);
if (wl->elp_compl) {
complete(wl->elp_compl);
wl->elp_compl = NULL;
}
ieee80211_queue_work(wl->hw, &wl->irq_work);
spin_unlock_irqrestore(&wl->wl_lock, flags);
return IRQ_HANDLED;
}
static int wl1271_fetch_firmware(struct wl1271 *wl)
{
const struct firmware *fw;
int ret;
ret = request_firmware(&fw, WL1271_FW_NAME, &wl->spi->dev);
if (ret < 0) {
wl1271_error("could not get firmware: %d", ret);
return ret;
}
if (fw->size % 4) {
wl1271_error("firmware size is not multiple of 32 bits: %zu",
fw->size);
ret = -EILSEQ;
goto out;
}
wl->fw_len = fw->size;
wl->fw = kmalloc(wl->fw_len, GFP_KERNEL);
if (!wl->fw) {
wl1271_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 wl1271_fetch_nvs(struct wl1271 *wl)
{
const struct firmware *fw;
int ret;
ret = request_firmware(&fw, WL1271_NVS_NAME, &wl->spi->dev);
if (ret < 0) {
wl1271_error("could not get nvs file: %d", ret);
return ret;
}
if (fw->size % 4) {
wl1271_error("nvs size is not multiple of 32 bits: %zu",
fw->size);
ret = -EILSEQ;
goto out;
}
wl->nvs_len = fw->size;
wl->nvs = kmalloc(wl->nvs_len, GFP_KERNEL);
if (!wl->nvs) {
wl1271_error("could not allocate memory for the nvs file");
ret = -ENOMEM;
goto out;
}
memcpy(wl->nvs, fw->data, wl->nvs_len);
ret = 0;
out:
release_firmware(fw);
return ret;
}
static void wl1271_fw_wakeup(struct wl1271 *wl)
{
u32 elp_reg;
elp_reg = ELPCTRL_WAKE_UP;
wl1271_write32(wl, HW_ACCESS_ELP_CTRL_REG_ADDR, elp_reg);
}
static int wl1271_setup(struct wl1271 *wl)
{
wl->fw_status = kmalloc(sizeof(*wl->fw_status), GFP_KERNEL);
if (!wl->fw_status)
return -ENOMEM;
wl->tx_res_if = kmalloc(sizeof(*wl->tx_res_if), GFP_KERNEL);
if (!wl->tx_res_if) {
kfree(wl->fw_status);
return -ENOMEM;
}
INIT_WORK(&wl->irq_work, wl1271_irq_work);
INIT_WORK(&wl->tx_work, wl1271_tx_work);
return 0;
}
static int wl1271_chip_wakeup(struct wl1271 *wl)
{
int ret = 0;
wl1271_power_on(wl);
msleep(WL1271_POWER_ON_SLEEP);
wl1271_spi_reset(wl);
wl1271_spi_init(wl);
/* We don't need a real memory partition here, because we only want
* to use the registers at this point. */
wl1271_set_partition(wl,
0x00000000,
0x00000000,
REGISTERS_BASE,
REGISTERS_DOWN_SIZE);
/* ELP module wake up */
wl1271_fw_wakeup(wl);
/* whal_FwCtrl_BootSm() */
/* 0. read chip id from CHIP_ID */
wl->chip.id = wl1271_reg_read32(wl, CHIP_ID_B);
/* 1. check if chip id is valid */
switch (wl->chip.id) {
case CHIP_ID_1271_PG10:
wl1271_warning("chip id 0x%x (1271 PG10) support is obsolete",
wl->chip.id);
ret = wl1271_setup(wl);
if (ret < 0)
goto out;
break;
case CHIP_ID_1271_PG20:
wl1271_debug(DEBUG_BOOT, "chip id 0x%x (1271 PG20)",
wl->chip.id);
ret = wl1271_setup(wl);
if (ret < 0)
goto out;
break;
default:
wl1271_error("unsupported chip id: 0x%x", wl->chip.id);
ret = -ENODEV;
goto out;
}
if (wl->fw == NULL) {
ret = wl1271_fetch_firmware(wl);
if (ret < 0)
goto out;
}
/* No NVS from netlink, try to get it from the filesystem */
if (wl->nvs == NULL) {
ret = wl1271_fetch_nvs(wl);
if (ret < 0)
goto out;
}
out:
return ret;
}
struct wl1271_filter_params {
unsigned int filters;
unsigned int changed;
int mc_list_length;
u8 mc_list[ACX_MC_ADDRESS_GROUP_MAX][ETH_ALEN];
};
#define WL1271_SUPPORTED_FILTERS (FIF_PROMISC_IN_BSS | \
FIF_ALLMULTI | \
FIF_FCSFAIL | \
FIF_BCN_PRBRESP_PROMISC | \
FIF_CONTROL | \
FIF_OTHER_BSS)
static void wl1271_filter_work(struct work_struct *work)
{
struct wl1271 *wl =
container_of(work, struct wl1271, filter_work);
struct wl1271_filter_params *fp;
unsigned long flags;
bool enabled = true;
int ret;
/* first, get the filter parameters */
spin_lock_irqsave(&wl->wl_lock, flags);
fp = wl->filter_params;
wl->filter_params = NULL;
spin_unlock_irqrestore(&wl->wl_lock, flags);
if (!fp)
return;
/* then, lock the mutex without risk of lock-up */
mutex_lock(&wl->mutex);
if (wl->state == WL1271_STATE_OFF)
goto out;
ret = wl1271_ps_elp_wakeup(wl, false);
if (ret < 0)
goto out;
/* configure the mc filter regardless of the changed flags */
if (fp->filters & FIF_ALLMULTI)
enabled = false;
ret = wl1271_acx_group_address_tbl(wl, enabled,
fp->mc_list, fp->mc_list_length);
if (ret < 0)
goto out_sleep;
/* determine, whether supported filter values have changed */
if (fp->changed == 0)
goto out;
/* apply configured filters */
ret = wl1271_cmd_join(wl);
if (ret < 0)
goto out_sleep;
out_sleep:
wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
kfree(fp);
}
int wl1271_plt_start(struct wl1271 *wl)
{
int ret;
mutex_lock(&wl->mutex);
wl1271_notice("power up");
if (wl->state != WL1271_STATE_OFF) {
wl1271_error("cannot go into PLT state because not "
"in off state: %d", wl->state);
ret = -EBUSY;
goto out;
}
wl->state = WL1271_STATE_PLT;
ret = wl1271_chip_wakeup(wl);
if (ret < 0)
goto out;
ret = wl1271_boot(wl);
if (ret < 0)
goto out;
wl1271_notice("firmware booted in PLT mode (%s)", wl->chip.fw_ver);
ret = wl1271_plt_init(wl);
if (ret < 0)
goto out;
out:
mutex_unlock(&wl->mutex);
return ret;
}
int wl1271_plt_stop(struct wl1271 *wl)
{
int ret = 0;
mutex_lock(&wl->mutex);
wl1271_notice("power down");
if (wl->state != WL1271_STATE_PLT) {
wl1271_error("cannot power down because not in PLT "
"state: %d", wl->state);
ret = -EBUSY;
goto out;
}
wl1271_disable_interrupts(wl);
wl1271_power_off(wl);
wl->state = WL1271_STATE_OFF;
out:
mutex_unlock(&wl->mutex);
return ret;
}
static int wl1271_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct wl1271 *wl = hw->priv;
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) >= WL1271_TX_QUEUE_MAX_LENGTH) {
ieee80211_stop_queues(wl->hw);
/*
* FIXME: this is racy, the variable is not properly
* protected. Maybe fix this by removing the stupid
* variable altogether and checking the real queue state?
*/
wl->tx_queue_stopped = true;
}
return NETDEV_TX_OK;
}
static int wl1271_op_start(struct ieee80211_hw *hw)
{
struct wl1271 *wl = hw->priv;
int ret = 0;
wl1271_debug(DEBUG_MAC80211, "mac80211 start");
mutex_lock(&wl->mutex);
if (wl->state != WL1271_STATE_OFF) {
wl1271_error("cannot start because not in off state: %d",
wl->state);
ret = -EBUSY;
goto out;
}
ret = wl1271_chip_wakeup(wl);
if (ret < 0)
goto out;
ret = wl1271_boot(wl);
if (ret < 0)
goto out;
ret = wl1271_hw_init(wl);
if (ret < 0)
goto out;
wl->state = WL1271_STATE_ON;
wl1271_info("firmware booted (%s)", wl->chip.fw_ver);
out:
if (ret < 0)
wl1271_power_off(wl);
mutex_unlock(&wl->mutex);
return ret;
}
static void wl1271_op_stop(struct ieee80211_hw *hw)
{
struct wl1271 *wl = hw->priv;
unsigned long flags;
int i;
wl1271_info("down");
wl1271_debug(DEBUG_MAC80211, "mac80211 stop");
/* complete/cancel ongoing work */
cancel_work_sync(&wl->filter_work);
spin_lock_irqsave(&wl->wl_lock, flags);
kfree(wl->filter_params);
wl->filter_params = NULL;
spin_unlock_irqrestore(&wl->wl_lock, flags);
mutex_lock(&wl->mutex);
WARN_ON(wl->state != WL1271_STATE_ON);
if (wl->scanning) {
mutex_unlock(&wl->mutex);
ieee80211_scan_completed(wl->hw, true);
mutex_lock(&wl->mutex);
wl->scanning = false;
}
wl->state = WL1271_STATE_OFF;
wl1271_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 */
wl1271_tx_flush(wl);
wl1271_power_off(wl);
memset(wl->bssid, 0, ETH_ALEN);
memset(wl->ssid, 0, IW_ESSID_MAX_SIZE + 1);
wl->ssid_len = 0;
wl->listen_int = 1;
wl->bss_type = MAX_BSS_TYPE;
wl->band = IEEE80211_BAND_2GHZ;
wl->rx_counter = 0;
wl->elp = false;
wl->psm = 0;
wl->tx_queue_stopped = false;
wl->power_level = WL1271_DEFAULT_POWER_LEVEL;
wl->tx_blocks_available = 0;
wl->tx_results_count = 0;
wl->tx_packets_count = 0;
wl->tx_security_last_seq = 0;
wl->tx_security_seq_16 = 0;
wl->tx_security_seq_32 = 0;
wl->time_offset = 0;
wl->session_counter = 0;
for (i = 0; i < NUM_TX_QUEUES; i++)
wl->tx_blocks_freed[i] = 0;
wl1271_debugfs_reset(wl);
mutex_unlock(&wl->mutex);
}
static int wl1271_op_add_interface(struct ieee80211_hw *hw,
struct ieee80211_if_init_conf *conf)
{
struct wl1271 *wl = hw->priv;
int ret = 0;
wl1271_debug(DEBUG_MAC80211, "mac80211 add interface type %d mac %pM",
conf->type, conf->mac_addr);
mutex_lock(&wl->mutex);
switch (conf->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;
}
/* FIXME: what if conf->mac_addr changes? */
out:
mutex_unlock(&wl->mutex);
return ret;
}
static void wl1271_op_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_if_init_conf *conf)
{
wl1271_debug(DEBUG_MAC80211, "mac80211 remove interface");
}
#if 0
static int wl1271_op_config_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_if_conf *conf)
{
struct wl1271 *wl = hw->priv;
struct sk_buff *beacon;
int ret;
wl1271_debug(DEBUG_MAC80211, "mac80211 config_interface bssid %pM",
conf->bssid);
wl1271_dump_ascii(DEBUG_MAC80211, "ssid: ", conf->ssid,
conf->ssid_len);
mutex_lock(&wl->mutex);
ret = wl1271_ps_elp_wakeup(wl, false);
if (ret < 0)
goto out;
memcpy(wl->bssid, conf->bssid, ETH_ALEN);
ret = wl1271_cmd_build_null_data(wl);
if (ret < 0)
goto out_sleep;
wl->ssid_len = conf->ssid_len;
if (wl->ssid_len)
memcpy(wl->ssid, conf->ssid, wl->ssid_len);
if (wl->bss_type != BSS_TYPE_IBSS) {
ret = wl1271_cmd_join(wl);
if (ret < 0)
goto out_sleep;
}
if (conf->changed & IEEE80211_IFCC_BEACON) {
beacon = ieee80211_beacon_get(hw, vif);
ret = wl1271_cmd_template_set(wl, CMD_TEMPL_BEACON,
beacon->data, beacon->len);
if (ret < 0) {
dev_kfree_skb(beacon);
goto out_sleep;
}
ret = wl1271_cmd_template_set(wl, CMD_TEMPL_PROBE_RESPONSE,
beacon->data, beacon->len);
dev_kfree_skb(beacon);
if (ret < 0)
goto out_sleep;
ret = wl1271_cmd_join(wl);
if (ret < 0)
goto out_sleep;
}
out_sleep:
wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
return ret;
}
#endif
static int wl1271_op_config(struct ieee80211_hw *hw, u32 changed)
{
struct wl1271 *wl = hw->priv;
struct ieee80211_conf *conf = &hw->conf;
int channel, ret = 0;
channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
wl1271_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);
wl->band = conf->channel->band;
ret = wl1271_ps_elp_wakeup(wl, false);
if (ret < 0)
goto out;
if (channel != wl->channel) {
u8 old_channel = wl->channel;
wl->channel = channel;
ret = wl1271_cmd_join(wl);
if (ret < 0) {
wl->channel = old_channel;
goto out_sleep;
}
}
ret = wl1271_cmd_build_null_data(wl);
if (ret < 0)
goto out_sleep;
if (conf->flags & IEEE80211_CONF_PS && !wl->psm_requested) {
wl1271_info("psm enabled");
wl->psm_requested = true;
/*
* We enter PSM only if we're already associated.
* If we're not, we'll enter it when joining an SSID,
* through the bss_info_changed() hook.
*/
ret = wl1271_ps_set_mode(wl, STATION_POWER_SAVE_MODE);
} else if (!(conf->flags & IEEE80211_CONF_PS) &&
wl->psm_requested) {
wl1271_info("psm disabled");
wl->psm_requested = false;
if (wl->psm)
ret = wl1271_ps_set_mode(wl, STATION_ACTIVE_MODE);
}
if (conf->power_level != wl->power_level) {
ret = wl1271_acx_tx_power(wl, conf->power_level);
if (ret < 0)
goto out;
wl->power_level = conf->power_level;
}
out_sleep:
wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
return ret;
}
static u64 wl1271_op_prepare_multicast(struct ieee80211_hw *hw, int mc_count,
struct dev_addr_list *mc_list)
{
struct wl1271 *wl = hw->priv;
struct wl1271_filter_params *fp;
unsigned long flags;
int i;
/*
* FIXME: we should return a hash that will be passed to
* configure_filter() instead of saving everything in the context.
*/
fp = kzalloc(sizeof(*fp), GFP_KERNEL);
if (!fp) {
wl1271_error("Out of memory setting filters.");
return 0;
}
/* update multicast filtering parameters */
if (mc_count > ACX_MC_ADDRESS_GROUP_MAX) {
mc_count = 0;
fp->filters |= FIF_ALLMULTI;
}
fp->mc_list_length = 0;
for (i = 0; i < mc_count; i++) {
if (mc_list->da_addrlen == ETH_ALEN) {
memcpy(fp->mc_list[fp->mc_list_length],
mc_list->da_addr, ETH_ALEN);
fp->mc_list_length++;
} else
wl1271_warning("Unknown mc address length.");
}
spin_lock_irqsave(&wl->wl_lock, flags);
kfree(wl->filter_params);
wl->filter_params = fp;
spin_unlock_irqrestore(&wl->wl_lock, flags);
return 1;
}
static void wl1271_op_configure_filter(struct ieee80211_hw *hw,
unsigned int changed,
unsigned int *total, u64 multicast)
{
struct wl1271 *wl = hw->priv;
wl1271_debug(DEBUG_MAC80211, "mac80211 configure filter");
*total &= WL1271_SUPPORTED_FILTERS;
changed &= WL1271_SUPPORTED_FILTERS;
if (!multicast)
return;
/*
* FIXME: for now we are still using a workqueue for filter
* configuration, but with the new mac80211, this is not needed,
* since configure_filter can now sleep. We now have
* prepare_multicast, which needs to be atomic instead.
*/
/* store current filter config */
wl->filter_params->filters = *total;
wl->filter_params->changed = changed;
ieee80211_queue_work(wl->hw, &wl->filter_work);
}
static int wl1271_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_conf)
{
struct wl1271 *wl = hw->priv;
const u8 *addr;
int ret;
u32 tx_seq_32 = 0;
u16 tx_seq_16 = 0;
u8 key_type;
static const u8 bcast_addr[ETH_ALEN] =
{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
wl1271_debug(DEBUG_MAC80211, "mac80211 set key");
addr = sta ? sta->addr : bcast_addr;
wl1271_debug(DEBUG_CRYPT, "CMD: 0x%x", cmd);
wl1271_dump(DEBUG_CRYPT, "ADDR: ", addr, ETH_ALEN);
wl1271_debug(DEBUG_CRYPT, "Key: algo:0x%x, id:%d, len:%d flags 0x%x",
key_conf->alg, key_conf->keyidx,
key_conf->keylen, key_conf->flags);
wl1271_dump(DEBUG_CRYPT, "KEY: ", key_conf->key, key_conf->keylen);
if (is_zero_ether_addr(addr)) {
/* We dont support TX only encryption */
ret = -EOPNOTSUPP;
goto out;
}
mutex_lock(&wl->mutex);
ret = wl1271_ps_elp_wakeup(wl, false);
if (ret < 0)
goto out_unlock;
switch (key_conf->alg) {
case ALG_WEP:
key_type = KEY_WEP;
key_conf->hw_key_idx = key_conf->keyidx;
break;
case ALG_TKIP:
key_type = KEY_TKIP;
key_conf->hw_key_idx = key_conf->keyidx;
tx_seq_32 = wl->tx_security_seq_32;
tx_seq_16 = wl->tx_security_seq_16;
break;
case ALG_CCMP:
key_type = KEY_AES;
key_conf->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
tx_seq_32 = wl->tx_security_seq_32;
tx_seq_16 = wl->tx_security_seq_16;
break;
default:
wl1271_error("Unknown key algo 0x%x", key_conf->alg);
ret = -EOPNOTSUPP;
goto out_sleep;
}
switch (cmd) {
case SET_KEY:
ret = wl1271_cmd_set_key(wl, KEY_ADD_OR_REPLACE,
key_conf->keyidx, key_type,
key_conf->keylen, key_conf->key,
addr, tx_seq_32, tx_seq_16);
if (ret < 0) {
wl1271_error("Could not add or replace key");
goto out_sleep;
}
break;
case DISABLE_KEY:
ret = wl1271_cmd_set_key(wl, KEY_REMOVE,
key_conf->keyidx, key_type,
key_conf->keylen, key_conf->key,
addr, 0, 0);
if (ret < 0) {
wl1271_error("Could not remove key");
goto out_sleep;
}
break;
default:
wl1271_error("Unsupported key cmd 0x%x", cmd);
ret = -EOPNOTSUPP;
goto out_sleep;
break;
}
out_sleep:
wl1271_ps_elp_sleep(wl);
out_unlock:
mutex_unlock(&wl->mutex);
out:
return ret;
}
static int wl1271_op_hw_scan(struct ieee80211_hw *hw,
struct cfg80211_scan_request *req)
{
struct wl1271 *wl = hw->priv;
int ret;
u8 *ssid = NULL;
size_t ssid_len = 0;
wl1271_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);
ret = wl1271_ps_elp_wakeup(wl, false);
if (ret < 0)
goto out;
ret = wl1271_cmd_scan(hw->priv, ssid, ssid_len, 1, 0, 13, 3);
wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
return ret;
}
static int wl1271_op_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
{
struct wl1271 *wl = hw->priv;
int ret;
mutex_lock(&wl->mutex);
ret = wl1271_ps_elp_wakeup(wl, false);
if (ret < 0)
goto out;
ret = wl1271_acx_rts_threshold(wl, (u16) value);
if (ret < 0)
wl1271_warning("wl1271_op_set_rts_threshold failed: %d", ret);
wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
return ret;
}
static u32 wl1271_enabled_rates_get(struct wl1271 *wl, u64 basic_rate_set)
{
struct ieee80211_supported_band *band;
u32 enabled_rates = 0;
int bit;
band = wl->hw->wiphy->bands[wl->band];
for (bit = 0; bit < band->n_bitrates; bit++) {
if (basic_rate_set & 0x1)
enabled_rates |= band->bitrates[bit].hw_value;
basic_rate_set >>= 1;
}
return enabled_rates;
}
static void wl1271_op_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss_conf,
u32 changed)
{
enum wl1271_cmd_ps_mode mode;
struct wl1271 *wl = hw->priv;
int ret;
wl1271_debug(DEBUG_MAC80211, "mac80211 bss info changed");
mutex_lock(&wl->mutex);
ret = wl1271_ps_elp_wakeup(wl, false);
if (ret < 0)
goto out;
if (changed & BSS_CHANGED_ASSOC) {
if (bss_conf->assoc) {
wl->beacon_int = bss_conf->beacon_int;
wl->dtim_period = bss_conf->dtim_period;
wl->aid = bss_conf->aid;
ret = wl1271_cmd_join(wl);
if (ret < 0) {
wl1271_warning("Association configuration "
"failed %d", ret);
goto out_sleep;
}
ret = wl1271_cmd_build_ps_poll(wl, wl->aid);
if (ret < 0)
goto out_sleep;
ret = wl1271_acx_aid(wl, wl->aid);
if (ret < 0)
goto out_sleep;
/* If we want to go in PSM but we're not there yet */
if (wl->psm_requested && !wl->psm) {
mode = STATION_POWER_SAVE_MODE;
ret = wl1271_ps_set_mode(wl, mode);
if (ret < 0)
goto out_sleep;
}
} else {
/* use defaults when not associated */
wl->beacon_int = WL1271_DEFAULT_BEACON_INT;
wl->dtim_period = WL1271_DEFAULT_DTIM_PERIOD;
wl->basic_rate_set = WL1271_DEFAULT_BASIC_RATE_SET;
wl->aid = 0;
}
}
if (changed & BSS_CHANGED_ERP_SLOT) {
if (bss_conf->use_short_slot)
ret = wl1271_acx_slot(wl, SLOT_TIME_SHORT);
else
ret = wl1271_acx_slot(wl, SLOT_TIME_LONG);
if (ret < 0) {
wl1271_warning("Set slot time failed %d", ret);
goto out_sleep;
}
}
if (changed & BSS_CHANGED_ERP_PREAMBLE) {
if (bss_conf->use_short_preamble)
wl1271_acx_set_preamble(wl, ACX_PREAMBLE_SHORT);
else
wl1271_acx_set_preamble(wl, ACX_PREAMBLE_LONG);
}
if (changed & BSS_CHANGED_ERP_CTS_PROT) {
if (bss_conf->use_cts_prot)
ret = wl1271_acx_cts_protect(wl, CTSPROTECT_ENABLE);
else
ret = wl1271_acx_cts_protect(wl, CTSPROTECT_DISABLE);
if (ret < 0) {
wl1271_warning("Set ctsprotect failed %d", ret);
goto out_sleep;
}
}
if (changed & BSS_CHANGED_BASIC_RATES) {
wl->basic_rate_set = wl1271_enabled_rates_get(
wl, bss_conf->basic_rates);
ret = wl1271_acx_rate_policies(wl, wl->basic_rate_set);
if (ret < 0) {
wl1271_warning("Set rate policies failed %d", ret);
goto out_sleep;
}
ret = wl1271_cmd_join(wl);
if (ret < 0) {
wl1271_warning("Join with new basic rate "
"set failed %d", ret);
goto out_sleep;
}
}
out_sleep:
wl1271_ps_elp_sleep(wl);
out:
mutex_unlock(&wl->mutex);
}
/* can't be const, mac80211 writes to this */
static struct ieee80211_rate wl1271_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 wl1271_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},
};
/* can't be const, mac80211 writes to this */
static struct ieee80211_supported_band wl1271_band_2ghz = {
.channels = wl1271_channels,
.n_channels = ARRAY_SIZE(wl1271_channels),
.bitrates = wl1271_rates,
.n_bitrates = ARRAY_SIZE(wl1271_rates),
};
static const struct ieee80211_ops wl1271_ops = {
.start = wl1271_op_start,
.stop = wl1271_op_stop,
.add_interface = wl1271_op_add_interface,
.remove_interface = wl1271_op_remove_interface,
.config = wl1271_op_config,
/* .config_interface = wl1271_op_config_interface, */
.prepare_multicast = wl1271_op_prepare_multicast,
.configure_filter = wl1271_op_configure_filter,
.tx = wl1271_op_tx,
.set_key = wl1271_op_set_key,
.hw_scan = wl1271_op_hw_scan,
.bss_info_changed = wl1271_op_bss_info_changed,
.set_rts_threshold = wl1271_op_set_rts_threshold,
};
static int wl1271_register_hw(struct wl1271 *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) {
wl1271_error("unable to register mac80211 hw: %d", ret);
return ret;
}
wl->mac80211_registered = true;
wl1271_notice("loaded");
return 0;
}
static int wl1271_init_ieee80211(struct wl1271 *wl)
{
/* The tx descriptor buffer and the TKIP space. */
wl->hw->extra_tx_headroom = WL1271_TKIP_IV_SPACE +
sizeof(struct wl1271_tx_hw_descr);
/* unit us */
/* FIXME: find a proper value */
wl->hw->channel_change_time = 10000;
wl->hw->flags = IEEE80211_HW_SIGNAL_DBM |
IEEE80211_HW_NOISE_DBM;
wl->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
wl->hw->wiphy->max_scan_ssids = 1;
wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &wl1271_band_2ghz;
SET_IEEE80211_DEV(wl->hw, &wl->spi->dev);
return 0;
}
static void wl1271_device_release(struct device *dev)
{
}
static struct platform_device wl1271_device = {
.name = "wl1271",
.id = -1,
/* device model insists to have a release function */
.dev = {
.release = wl1271_device_release,
},
};
#define WL1271_DEFAULT_CHANNEL 0
static int __devinit wl1271_probe(struct spi_device *spi)
{
struct wl12xx_platform_data *pdata;
struct ieee80211_hw *hw;
struct wl1271 *wl;
int ret, i;
static const u8 nokia_oui[3] = {0x00, 0x1f, 0xdf};
pdata = spi->dev.platform_data;
if (!pdata) {
wl1271_error("no platform data");
return -ENODEV;
}
hw = ieee80211_alloc_hw(sizeof(*wl), &wl1271_ops);
if (!hw) {
wl1271_error("could not alloc ieee80211_hw");
return -ENOMEM;
}
wl = hw->priv;
memset(wl, 0, sizeof(*wl));
wl->hw = hw;
dev_set_drvdata(&spi->dev, wl);
wl->spi = spi;
skb_queue_head_init(&wl->tx_queue);
INIT_WORK(&wl->filter_work, wl1271_filter_work);
INIT_DELAYED_WORK(&wl->elp_work, wl1271_elp_work);
wl->channel = WL1271_DEFAULT_CHANNEL;
wl->scanning = false;
wl->default_key = 0;
wl->listen_int = 1;
wl->rx_counter = 0;
wl->rx_config = WL1271_DEFAULT_RX_CONFIG;
wl->rx_filter = WL1271_DEFAULT_RX_FILTER;
wl->elp = false;
wl->psm = 0;
wl->psm_requested = false;
wl->tx_queue_stopped = false;
wl->power_level = WL1271_DEFAULT_POWER_LEVEL;
wl->beacon_int = WL1271_DEFAULT_BEACON_INT;
wl->dtim_period = WL1271_DEFAULT_DTIM_PERIOD;
wl->basic_rate_set = WL1271_DEFAULT_BASIC_RATE_SET;
wl->band = IEEE80211_BAND_2GHZ;
for (i = 0; i < ACX_TX_DESCRIPTORS; i++)
wl->tx_frames[i] = NULL;
spin_lock_init(&wl->wl_lock);
/*
* 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 = WL1271_STATE_OFF;
mutex_init(&wl->mutex);
wl->rx_descriptor = kmalloc(sizeof(*wl->rx_descriptor), GFP_KERNEL);
if (!wl->rx_descriptor) {
wl1271_error("could not allocate memory for rx descriptor");
ret = -ENOMEM;
goto out_free;
}
/* This is the only SPI value that we need to set here, the rest
* comes from the board-peripherals file */
spi->bits_per_word = 32;
ret = spi_setup(spi);
if (ret < 0) {
wl1271_error("spi_setup failed");
goto out_free;
}
wl->set_power = pdata->set_power;
if (!wl->set_power) {
wl1271_error("set power function missing in platform data");
ret = -ENODEV;
goto out_free;
}
wl->irq = spi->irq;
if (wl->irq < 0) {
wl1271_error("irq missing in platform data");
ret = -ENODEV;
goto out_free;
}
ret = request_irq(wl->irq, wl1271_irq, 0, DRIVER_NAME, wl);
if (ret < 0) {
wl1271_error("request_irq() failed: %d", ret);
goto out_free;
}
set_irq_type(wl->irq, IRQ_TYPE_EDGE_RISING);
disable_irq(wl->irq);
ret = platform_device_register(&wl1271_device);
if (ret) {
wl1271_error("couldn't register platform device");
goto out_irq;
}
dev_set_drvdata(&wl1271_device.dev, wl);
ret = wl1271_init_ieee80211(wl);
if (ret)
goto out_platform;
ret = wl1271_register_hw(wl);
if (ret)
goto out_platform;
wl1271_debugfs_init(wl);
wl1271_notice("initialized");
return 0;
out_platform:
platform_device_unregister(&wl1271_device);
out_irq:
free_irq(wl->irq, wl);
out_free:
kfree(wl->rx_descriptor);
wl->rx_descriptor = NULL;
ieee80211_free_hw(hw);
return ret;
}
static int __devexit wl1271_remove(struct spi_device *spi)
{
struct wl1271 *wl = dev_get_drvdata(&spi->dev);
ieee80211_unregister_hw(wl->hw);
wl1271_debugfs_exit(wl);
platform_device_unregister(&wl1271_device);
free_irq(wl->irq, wl);
kfree(wl->target_mem_map);
kfree(wl->fw);
wl->fw = NULL;
kfree(wl->nvs);
wl->nvs = NULL;
kfree(wl->rx_descriptor);
wl->rx_descriptor = NULL;
kfree(wl->fw_status);
kfree(wl->tx_res_if);
ieee80211_free_hw(wl->hw);
return 0;
}
static struct spi_driver wl1271_spi_driver = {
.driver = {
.name = "wl1271",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
},
.probe = wl1271_probe,
.remove = __devexit_p(wl1271_remove),
};
static int __init wl1271_init(void)
{
int ret;
ret = spi_register_driver(&wl1271_spi_driver);
if (ret < 0) {
wl1271_error("failed to register spi driver: %d", ret);
goto out;
}
out:
return ret;
}
static void __exit wl1271_exit(void)
{
spi_unregister_driver(&wl1271_spi_driver);
wl1271_notice("unloaded");
}
module_init(wl1271_init);
module_exit(wl1271_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Luciano Coelho <luciano.coelho@nokia.com>");
MODULE_AUTHOR("Juuso Oikarinen <juuso.oikarinen@nokia.com>");
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