path: root/drivers/net/wireless/libertas/main.c

/**
  * This file contains the major functions in WLAN
  * driver. It includes init, exit, open, close and main
  * thread etc..
  */

#include <linux/moduleparam.h>
#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/kthread.h>
#include <linux/kfifo.h>
#include <linux/slab.h>
#include <net/cfg80211.h>

#include "host.h"
#include "decl.h"
#include "dev.h"
#include "cfg.h"
#include "debugfs.h"
#include "cmd.h"

#define DRIVER_RELEASE_VERSION "323.p0"
const char lbs_driver_version[] = "COMM-USB8388-" DRIVER_RELEASE_VERSION
#ifdef  DEBUG
    "-dbg"
#endif
    "";


/* Module parameters */
unsigned int lbs_debug;
EXPORT_SYMBOL_GPL(lbs_debug);
module_param_named(libertas_debug, lbs_debug, int, 0644);


/* This global structure is used to send the confirm_sleep command as
 * fast as possible down to the firmware. */
struct cmd_confirm_sleep confirm_sleep;


/**
 * the table to keep region code
 */
u16 lbs_region_code_to_index[MRVDRV_MAX_REGION_CODE] =
    { 0x10, 0x20, 0x30, 0x31, 0x32, 0x40 };

/**
 * FW rate table.  FW refers to rates by their index in this table, not by the
 * rate value itself.  Values of 0x00 are
 * reserved positions.
 */
static u8 fw_data_rates[MAX_RATES] =
    { 0x02, 0x04, 0x0B, 0x16, 0x00, 0x0C, 0x12,
      0x18, 0x24, 0x30, 0x48, 0x60, 0x6C, 0x00
};

/**
 *  @brief use index to get the data rate
 *
 *  @param idx                The index of data rate
 *  @return 	   		data rate or 0
 */
u32 lbs_fw_index_to_data_rate(u8 idx)
{
	if (idx >= sizeof(fw_data_rates))
		idx = 0;
	return fw_data_rates[idx];
}

/**
 *  @brief use rate to get the index
 *
 *  @param rate                 data rate
 *  @return 	   		index or 0
 */
u8 lbs_data_rate_to_fw_index(u32 rate)
{
	u8 i;

	if (!rate)
		return 0;

	for (i = 0; i < sizeof(fw_data_rates); i++) {
		if (rate == fw_data_rates[i])
			return i;
	}
	return 0;
}


/**
 *  @brief This function opens the ethX interface
 *
 *  @param dev     A pointer to net_device structure
 *  @return 	   0 or -EBUSY if monitor mode active
 */
static int lbs_dev_open(struct net_device *dev)
{
	struct lbs_private *priv = dev->ml_priv;
	int ret = 0;

	lbs_deb_enter(LBS_DEB_NET);

	spin_lock_irq(&priv->driver_lock);

	if (priv->connect_status == LBS_CONNECTED)
		netif_carrier_on(dev);
	else
		netif_carrier_off(dev);

	if (!priv->tx_pending_len)
		netif_wake_queue(dev);

	spin_unlock_irq(&priv->driver_lock);
	lbs_deb_leave_args(LBS_DEB_NET, "ret %d", ret);
	return ret;
}

/**
 *  @brief This function closes the ethX interface
 *
 *  @param dev     A pointer to net_device structure
 *  @return 	   0
 */
static int lbs_eth_stop(struct net_device *dev)
{
	struct lbs_private *priv = dev->ml_priv;

	lbs_deb_enter(LBS_DEB_NET);

	spin_lock_irq(&priv->driver_lock);
	netif_stop_queue(dev);
	spin_unlock_irq(&priv->driver_lock);

	schedule_work(&priv->mcast_work);

	lbs_deb_leave(LBS_DEB_NET);
	return 0;
}

static void lbs_tx_timeout(struct net_device *dev)
{
	struct lbs_private *priv = dev->ml_priv;

	lbs_deb_enter(LBS_DEB_TX);

	lbs_pr_err("tx watch dog timeout\n");

	dev->trans_start = jiffies; /* prevent tx timeout */

	if (priv->currenttxskb)
		lbs_send_tx_feedback(priv, 0);

	/* XX: Shouldn't we also call into the hw-specific driver
	   to kick it somehow? */
	lbs_host_to_card_done(priv);

	/* FIXME: reset the card */

	lbs_deb_leave(LBS_DEB_TX);
}

void lbs_host_to_card_done(struct lbs_private *priv)
{
	unsigned long flags;

	lbs_deb_enter(LBS_DEB_THREAD);

	spin_lock_irqsave(&priv->driver_lock, flags);

	priv->dnld_sent = DNLD_RES_RECEIVED;

	/* Wake main thread if commands are pending */
	if (!priv->cur_cmd || priv->tx_pending_len > 0) {
		if (!priv->wakeup_dev_required)
			wake_up_interruptible(&priv->waitq);
	}

	spin_unlock_irqrestore(&priv</