/*
* Copyright (C) 2008, cozybit Inc.
* Copyright (C) 2003-2006, Marvell International Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*/
#include "libertas_tf.h"
#include "linux/etherdevice.h"
#define DRIVER_RELEASE_VERSION "004.p0"
/* thinfirm version: 5.132.X.pX */
#define LBTF_FW_VER_MIN 0x05840300
#define LBTF_FW_VER_MAX 0x0584ffff
#define QOS_CONTROL_LEN 2
static const char lbtf_driver_version[] = "THINFIRM-USB8388-" DRIVER_RELEASE_VERSION;
struct workqueue_struct *lbtf_wq;
static const struct ieee80211_channel lbtf_channels[] = {
{ .center_freq = 2412, .hw_value = 1 },
{ .center_freq = 2417, .hw_value = 2 },
{ .center_freq = 2422, .hw_value = 3 },
{ .center_freq = 2427, .hw_value = 4 },
{ .center_freq = 2432, .hw_value = 5 },
{ .center_freq = 2437, .hw_value = 6 },
{ .center_freq = 2442, .hw_value = 7 },
{ .center_freq = 2447, .hw_value = 8 },
{ .center_freq = 2452, .hw_value = 9 },
{ .center_freq = 2457, .hw_value = 10 },
{ .center_freq = 2462, .hw_value = 11 },
{ .center_freq = 2467, .hw_value = 12 },
{ .center_freq = 2472, .hw_value = 13 },
{ .center_freq = 2484, .hw_value = 14 },
};
/* This table contains the hardware specific values for the modulation rates. */
static const struct ieee80211_rate lbtf_rates[] = {
{ .bitrate = 10,
.hw_value = 0, },
{ .bitrate = 20,
.hw_value = 1,
.flags = IEEE80211_RATE_SHORT_PREAMBLE },
{ .bitrate = 55,
.hw_value = 2,
.flags = IEEE80211_RATE_SHORT_PREAMBLE },
{ .bitrate = 110,
.hw_value = 3,
.flags = IEEE80211_RATE_SHORT_PREAMBLE },
{ .bitrate = 60,
.hw_value = 5,
.flags = 0 },
{ .bitrate = 90,
.hw_value = 6,
.flags = 0 },
{ .bitrate = 120,
.hw_value = 7,
.flags = 0 },
{ .bitrate = 180,
.hw_value = 8,
.flags = 0 },
{ .bitrate = 240,
.hw_value = 9,
.flags = 0 },
{ .bitrate = 360,
.hw_value = 10,
.flags = 0 },
{ .bitrate = 480,
.hw_value = 11,
.flags = 0 },
{ .bitrate = 540,
.hw_value = 12,
.flags = 0 },
};
static void lbtf_cmd_work(struct work_struct *work)
{
struct lbtf_private *priv = container_of(work, struct lbtf_private,
cmd_work);
spin_lock_irq(&priv->driver_lock);
/* command response? */
if (priv->cmd_response_rxed) {
priv->cmd_response_rxed = 0;
spin_unlock_irq(&priv->driver_lock);
lbtf_process_rx_command(priv);
spin_lock_irq(&priv->driver_lock);
}
if (priv->cmd_timed_out && priv->cur_cmd) {
struct cmd_ctrl_node *cmdnode = priv->cur_cmd;
if (++priv->nr_retries > 10) {
lbtf_complete_command(priv, cmdnode,
-ETIMEDOUT);
priv->nr_retries = 0;
} else {
priv->cur_cmd = NULL;
/* Stick it back at the _top_ of the pending
* queue for immediate resubmission */
list_add(&cmdnode->list, &priv->cmdpendingq);
}
}
priv->cmd_timed_out = 0;
spin_unlock_irq(&priv->driver_lock);
if (!priv->fw_ready)
return;
/* Execute the next command */
if (!priv->cur_cmd)
lbtf_execute_next_command(priv);
}
/**
* lbtf_setup_firmware: initialize firmware.
*
* @priv A pointer to struct lbtf_private structure
*
* Returns: 0 on success.
*/
static int lbtf_setup_firmware(struct lbtf_private *priv)
{
int ret = -1;
/*
* Read priv address from HW
*/
memset(priv->current_addr, 0xff, ETH_ALEN);
ret = lbtf_update_hw_spec(priv);
if (ret) {
ret = -1;
goto done;
}
lbtf_set_mac_control(priv);
lbtf_set_radio_control(priv);
ret = 0;
done:
return ret;
}
/**
* This function handles the timeout of command sending.
* It will re-send the same command again.
*/
static void command_timer_fn(unsigned long data)
{
struct lbtf_private *priv = (struct lbtf_private *)data;
unsigned long flags;
spin_lock_irqsave(&priv->driver_lock, flags);
if (!priv->cur_cmd) {
printk(KERN_DEBUG "libertastf: command timer expired; "
"no pending command\n");
goto out;
}
printk(KERN_DEBUG "libertas: command %x timed out\n",
le16_to_cpu(priv->cur_cmd->cmdbuf->command));
priv->cmd_timed_out = 1;
queue_work(lbtf_wq, &priv->cmd_work);
out:
spin_unlock_irqrestore(&priv->driver_lock, flags);
}
static int lbtf_init_adapter(struct lbtf_private *priv)
{
memset(priv->current_addr, 0xff, ETH_ALEN);
mutex_init(&priv->lock);
priv->vif = NULL;
setup_timer(&priv->command_timer, command_timer_fn,
(unsigned long)priv);
INIT_LIST_HEAD(&priv->cmdfreeq);
INIT_LIST_HEAD(&priv->cmdpendingq);
spin_lock_init(&priv->driver_lock);
/* Allocate the command buffers */
if (lbtf_allocate_cmd_buffer(priv))
return -1;
return 0;
}
static void lbtf_free_adapter(struct lbtf_private *priv)
{
lbtf_free_cmd_buffer(priv);
del_timer(&priv->command_timer);
}
static int lbtf_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
{
struct lbtf_private *priv = hw->priv;
priv->skb_to_tx = skb;
queue_work(lbtf_wq, &priv->tx_work);
/*
* queue will be restarted when we receive transmission feedback if
* there are no buffered multicast frames to send
*/
ieee80211_stop_queues(priv->hw);
return NETDEV_TX_OK;
}
static void lbtf_tx_work(struct work_struct *work)
{
struct lbtf_private *priv = container_of(work, struct lbtf_private,
tx_work);
unsigned int len;
struct ieee80211_tx_info *info;
struct txpd *txpd;
struct sk_buff *skb = NULL;
int err;
if ((priv->vif->type == NL80211_IFTYPE_AP) &&
(!skb_queue_empty(&priv->bc_ps_buf)))
skb = skb_dequeue(&priv->bc_ps_buf);
else if (priv->skb_to_tx) {
skb = priv->skb_to_tx;
priv->skb_to_tx = NULL;
} else
return;
len = skb->len;
info = IEEE80211_SKB_CB(skb);
txpd = (struct txpd *) skb_push(skb, sizeof(struct txpd));
if (priv->surpriseremoved) {
dev_kfree_skb_any(skb);
return;
}
memset(txpd, 0, sizeof(struct txpd));
/* Activate per-packet rate selection */
txpd->tx_control |= cpu_to_le32(MRVL_PER_PACKET_RATE |
ieee80211_get_tx_rate(priv->hw, info)->hw_value);
/* copy destination address from 802.11 header */
memcpy(txpd->tx_dest_addr_high, skb->data + sizeof(struct txpd) + 4,
ETH_ALEN);
txpd->tx_packet_length = cpu_to_le16(len);
txpd->tx_packet_location = cpu_to_le32(sizeof(struct txpd));
BUG_ON(priv->tx_skb);
spin_lock_irq(&priv->driver_lock);
priv->tx_skb = skb;
err = priv->hw_host_to_card(priv, MVMS_DAT, skb->data, skb->len);
spin_unlock_irq(&priv->driver_lock);
if (err) {
dev_kfree_skb_any(skb);
priv->tx_skb = NULL;
}
}
static int lbtf_op_start(struct ieee80211_hw *hw)
{
struct lbtf_private *priv = hw->priv;
void *card = priv->card;
int ret = -1;
if (!priv->fw_ready)
/* Upload firmware */
if (priv->hw_prog_firmware(card))
goto err_prog_firmware;
/* poke the firmware */
priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
priv->radioon = RADIO_ON;
priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
ret = lbtf_setup_firmware(priv);
if (ret)
goto err_prog_firmware;
if ((priv->fwrelease < LBTF_FW_VER_MIN) ||
(priv->fwrelease > LBTF_FW_VER_MAX)) {
ret = -1;
goto err_prog_firmware;
}
printk(KERN_INFO "libertastf: Marvell WLAN 802.11 thinfirm adapter\n");
return 0;
err_prog_firmware:
priv->hw_reset_device(card);
return ret;
}
static void lbtf_op_stop(struct ieee80211_hw *hw)
{
struct lbtf_private *priv = hw->priv;
unsigned long flags;
struct sk_buff *skb;
struct cmd_ctrl_node *cmdnode;
/* Flush pending command nodes */
spin_lock_irqsave(&priv->driver_lock, flags);
list_for_each_entry(cmdnode, &priv->cmdpendingq, list) {
cmdnode->result = -ENOENT;
cmdnode->cmdwaitqwoken = 1;
wake_up_interruptible(&cmdnode->cmdwait_q);
}
spin_unlock_irqrestore(&priv->driver_lock, flags);
cancel_work_sync(&priv->cmd_work);
cancel_work_sync(&priv->tx_work);
while ((skb = skb_dequeue(&priv->bc_ps_buf)))
dev_kfree_skb_any(skb);
priv->radioon = RADIO_OFF;
lbtf_set_radio_control(priv);
return;
}
static int lbtf_op_add_interface(struct ieee80211_hw *hw,
struct ieee80211_if_init_conf *conf)
{
struct lbtf_private *priv = hw->priv;
if (priv->vif != NULL)
return -EOPNOTSUPP;
priv->vif = conf->vif;
switch (conf->type) {
case NL80211_IFTYPE_MESH_POINT:
case NL80211_IFTYPE_AP:
lbtf_set_mode(priv, LBTF_AP_MODE);
break;
case NL80211_IFTYPE_STATION:
lbtf_set_mode(priv, LBTF_STA_MODE);
break;
default:
priv->vif = NULL;
return -EOPNOTSUPP;
}
lbtf_set_mac_address(priv, (u8 *) conf->mac_addr);
return 0;
}
static void lbtf_op_remove_interface(struct ieee80211_hw *hw,
struct ieee80211_if_init_conf *conf)
{
struct lbtf_private *priv = hw->priv;
if (priv->vif->type == NL80211_IFTYPE_AP ||
priv->vif->type == NL80211_IFTYPE_MESH_POINT)
lbtf_beacon_ctrl(priv, 0, 0);
lbtf_set_mode(priv, LBTF_PASSIVE_MODE);
lbtf_set_bssid(priv, 0, NULL);
priv->vif = NULL;
}
static int lbtf_op_config(struct ieee80211_hw *hw, u32 changed)
{
struct lbtf_private *priv = hw->priv;
struct ieee80211_conf *conf = &hw->conf;
if (conf->channel->center_freq != priv->cur_freq) {
priv->cur_freq = conf->channel->center_freq;
lbtf_set_channel(priv, conf->channel->hw_value);
}
return 0;
}
static int lbtf_op_config_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_if_conf *conf)
{
struct lbtf_private *priv = hw->priv;
struct sk_buff *beacon;
switch (priv->vif->type) {
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_MESH_POINT:
beacon = ieee80211_beacon_get(hw, vif);
if (beacon) {
lbtf_beacon_set(priv, beacon);
kfree_skb(beacon);
lbtf_beacon_ctrl(priv, 1, hw->conf.beacon_int);
}
break;
default:
break;
}
if (conf->bssid) {
u8 null_bssid[ETH_ALEN] = {0};
bool activate = compare_ether_addr(conf->bssid, null_bssid);
lbtf_set_bssid(priv, activate, conf->bssid);
}
return 0;
}
#define SUPPORTED_FIF_FLAGS (FIF_PROMISC_IN_BSS | FIF_ALLMULTI)
static void lbtf_op_configure_filter(struct ieee80211_hw *hw,
unsigned int changed_flags,
unsigned int *new_flags,
int mc_count, struct dev_mc_list *mclist)
{
struct lbtf_private *priv = hw->priv;
int old_mac_control = priv->mac_control;
int i;
changed_flags &= SUPPORTED_FIF_FLAGS;
*new_flags &= SUPPORTED_FIF_FLAGS;
if (!changed_flags)
return;
if (*new_flags & (FIF_PROMISC_IN_BSS))
priv->mac_control |= CMD_ACT_MAC_PROMISCUOUS_ENABLE;
else
priv->mac_control &= ~CMD_ACT_MAC_PROMISCUOUS_ENABLE;
if (*new_flags & (FIF_ALLMULTI) ||
mc_count > MRVDRV_MAX_MULTICAST_LIST_SIZE) {
priv->mac_control |= CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
priv->mac_control &= ~CMD_ACT_MAC_MULTICAST_ENABLE;
} else if (mc_count) {
priv->mac_control |= CMD_ACT_MAC_MULTICAST_ENABLE;
priv->mac_control &= ~CMD_ACT_MAC_ALL_MULTICAST_ENABLE;
priv->nr_of_multicastmacaddr = mc_count;
for (i = 0; i < mc_count; i++) {
if (!mclist)
break;
memcpy(&priv->multicastlist[i], mclist->da_addr,
ETH_ALEN);
mclist = mclist->next;
}
lbtf_cmd_set_mac_multicast_addr(priv);
} else {
priv->mac_control &= ~(CMD_ACT_MAC_MULTICAST_ENABLE |
CMD_ACT_MAC_ALL_MULTICAST_ENABLE);
if (priv->nr_of_multicastmacaddr) {
priv->nr_of_multicastmacaddr = 0;
lbtf_cmd_set_mac_multicast_addr(priv);
}
}
if (priv->mac_control != old_mac_control)
lbtf_set_mac_control(priv);
}
static void lbtf_op_bss_info_changed(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_bss_conf *bss_conf,
u32 changes)
{
struct lbtf_private *priv = hw->priv;
if (changes & BSS_CHANGED_ERP_PREAMBLE) {
if (bss_conf->use_short_preamble)
priv->preamble = CMD_TYPE_SHORT_PREAMBLE;
else
priv->preamble = CMD_TYPE_LONG_PREAMBLE;
lbtf_set_radio_control(priv);
}
return;
}
static const struct ieee80211_ops lbtf_ops = {
.tx = lbtf_op_tx,
.start = lbtf_op_start,
.stop = lbtf_op_stop,
.add_interface = lbtf_op_add_interface,
.remove_interface = lbtf_op_remove_interface,
.config = lbtf_op_config,
.config_interface = lbtf_op_config_interface,
.configure_filter = lbtf_op_configure_filter,
.bss_info_changed = lbtf_op_bss_info_changed,
};
int lbtf_rx(struct lbtf_private *priv, struct sk_buff *skb)
{
struct ieee80211_rx_status stats;
struct rxpd *prxpd;
int need_padding;
unsigned int flags;
struct ieee80211_hdr *hdr;
prxpd = (struct rxpd *) skb->data;
stats.flag = 0;
if (!(prxpd->status & cpu_to_le16(MRVDRV_RXPD_STATUS_OK)))
stats.flag |= RX_FLAG_FAILED_FCS_CRC;
stats.freq = priv->cur_freq;
stats.band = IEEE80211_BAND_2GHZ;
stats.signal = prxpd->snr;
stats.noise = prxpd->nf;
stats.qual = prxpd->snr - prxpd->nf;
/* Marvell rate index has a hole at value 4 */
if (prxpd->rx_rate > 4)
--prxpd->rx_rate;
stats.rate_idx = prxpd->rx_rate;
skb_pull(skb, sizeof(struct rxpd));
hdr = (struct ieee80211_hdr *)skb->data;
flags = le32_to_cpu(*(__le32 *)(skb->data + 4));
need_padding = ieee80211_is_data_qos(hdr->frame_control);
need_padding ^= ieee80211_has_a4(hdr->frame_control);
need_padding ^= ieee80211_is_data_qos(hdr->frame_control) &&
(*ieee80211_get_qos_ctl(hdr) &
IEEE80211_QOS_CONTROL_A_MSDU_PRESENT);
if (need_padding) {
memmove(skb->data + 2, skb->data, skb->len);
skb_reserve(skb, 2);
}
ieee80211_rx_irqsafe(priv->hw, skb, &stats);
return 0;
}
EXPORT_SYMBOL_GPL(lbtf_rx);
/**
* lbtf_add_card: Add and initialize the card, no fw upload yet.
*
* @card A pointer to card
*
* Returns: pointer to struct lbtf_priv.
*/
struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev)
{
struct ieee80211_hw *hw;
struct lbtf_private *priv = NULL;
hw = ieee80211_alloc_hw(sizeof(struct lbtf_private), &lbtf_ops);
if (!hw)
goto done;
priv = hw->priv;
if (lbtf_init_adapter(priv))
goto err_init_adapter;
priv->hw = hw;
priv->card = card;
priv->tx_skb = NULL;
hw->queues = 1;
hw->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING;
hw->extra_tx_headroom = sizeof(struct txpd);
memcpy(priv->channels, lbtf_channels, sizeof(lbtf_channels));
memcpy(priv->rates, lbtf_rates, sizeof(lbtf_rates));
priv->band.n_bitrates = ARRAY_SIZE(lbtf_rates);
priv->band.bitrates = priv->rates;
priv->band.n_channels = ARRAY_SIZE(lbtf_channels);
priv->band.channels = priv->channels;
hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;
skb_queue_head_init(&priv->bc_ps_buf);
SET_IEEE80211_DEV(hw, dmdev);
INIT_WORK(&priv->cmd_work, lbtf_cmd_work);
INIT_WORK(&priv->tx_work, lbtf_tx_work);
if (ieee80211_register_hw(hw))
goto err_init_adapter;
goto done;
err_init_adapter:
lbtf_free_adapter(priv);
ieee80211_free_hw(hw);
priv = NULL;
done:
return priv;
}
EXPORT_SYMBOL_GPL(lbtf_add_card);
int lbtf_remove_card(struct lbtf_private *priv)
{
struct ieee80211_hw *hw = priv->hw;
priv->surpriseremoved = 1;
del_timer(&priv->command_timer);
lbtf_free_adapter(priv);
priv->hw = NULL;
ieee80211_unregister_hw(hw);
ieee80211_free_hw(hw);
return 0;
}
EXPORT_SYMBOL_GPL(lbtf_remove_card);
void lbtf_send_tx_feedback(struct lbtf_private *priv, u8 retrycnt, u8 fail)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
ieee80211_tx_info_clear_status(info);
/*
* Commented out, otherwise we never go beyond 1Mbit/s using mac80211
* default pid rc algorithm.
*
* info->status.retry_count = MRVL_DEFAULT_RETRIES - retrycnt;
*/
if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && !fail)
info->flags |= IEEE80211_TX_STAT_ACK;
skb_pull(priv->tx_skb, sizeof(struct txpd));
ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
priv->tx_skb = NULL;
if (!priv->skb_to_tx && skb_queue_empty(&priv->bc_ps_buf))
ieee80211_wake_queues(priv->hw);
else
queue_work(lbtf_wq, &priv->tx_work);
}
EXPORT_SYMBOL_GPL(lbtf_send_tx_feedback);
void lbtf_bcn_sent(struct lbtf_private *priv)
{
struct sk_buff *skb = NULL;
if (priv->vif->type != NL80211_IFTYPE_AP)
return;
if (skb_queue_empty(&priv->bc_ps_buf)) {
bool tx_buff_bc = 0;
while ((skb = ieee80211_get_buffered_bc(priv->hw, priv->vif))) {
skb_queue_tail(&priv->bc_ps_buf, skb);
tx_buff_bc = 1;
}
if (tx_buff_bc) {
ieee80211_stop_queues(priv->hw);
queue_work(lbtf_wq, &priv->tx_work);
}
}
skb = ieee80211_beacon_get(priv->hw, priv->vif);
if (skb) {
lbtf_beacon_set(priv, skb);
kfree_skb(skb);
}
}
EXPORT_SYMBOL_GPL(lbtf_bcn_sent);
static int __init lbtf_init_module(void)
{
lbtf_wq = create_workqueue("libertastf");
if (lbtf_wq == NULL) {
printk(KERN_ERR "libertastf: couldn't create workqueue\n");
return -ENOMEM;
}
return 0;
}
static void __exit lbtf_exit_module(void)
{
destroy_workqueue(lbtf_wq);
}
module_init(lbtf_init_module);
module_exit(lbtf_exit_module);
MODULE_DESCRIPTION("Libertas WLAN Thinfirm Driver Library");
MODULE_AUTHOR("Cozybit Inc.");
MODULE_LICENSE("GPL");
