path: root/drivers/net/wireless/zd1211rw/zd_mac.c

/* zd_mac.c
 *
 * 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.
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/wireless.h>
#include <linux/usb.h>
#include <linux/jiffies.h>
#include <net/ieee80211_radiotap.h>

#include "zd_def.h"
#include "zd_chip.h"
#include "zd_mac.h"
#include "zd_ieee80211.h"
#include "zd_netdev.h"
#include "zd_rf.h"
#include "zd_util.h"

static void ieee_init(struct ieee80211_device *ieee);
static void softmac_init(struct ieee80211softmac_device *sm);

static void housekeeping_init(struct zd_mac *mac);
static void housekeeping_enable(struct zd_mac *mac);
static void housekeeping_disable(struct zd_mac *mac);

int zd_mac_init(struct zd_mac *mac,
	        struct net_device *netdev,
	        struct usb_interface *intf)
{
	struct ieee80211_device *ieee = zd_netdev_ieee80211(netdev);

	memset(mac, 0, sizeof(*mac));
	spin_lock_init(&mac->lock);
	mac->netdev = netdev;

	ieee_init(ieee);
	softmac_init(ieee80211_priv(netdev));
	zd_chip_init(&mac->chip, netdev, intf);
	housekeeping_init(mac);
	return 0;
}

static int reset_channel(struct zd_mac *mac)
{
	int r;
	unsigned long flags;
	const struct channel_range *range;

	spin_lock_irqsave(&mac->lock, flags);
	range = zd_channel_range(mac->regdomain);
	if (!range->start) {
		r = -EINVAL;
		goto out;
	}
	mac->requested_channel = range->start;
	r = 0;
out:
	spin_unlock_irqrestore(&mac->lock, flags);
	return r;
}

int zd_mac_init_hw(struct zd_mac *mac, u8 device_type)
{
	int r;
	struct zd_chip *chip = &mac->chip;
	u8 addr[ETH_ALEN];
	u8 default_regdomain;

	r = zd_chip_enable_int(chip);
	if (r)
		goto out;
	r = zd_chip_init_hw(chip, device_type);
	if (r)
		goto disable_int;

	zd_get_e2p_mac_addr(chip, addr);
	r = zd_write_mac_addr(chip, addr);
	if (r)
		goto disable_int;
	ZD_ASSERT(!irqs_disabled());
	spin_lock_irq(&mac->lock);
	memcpy(mac->netdev->dev_addr, addr, ETH_ALEN);
	spin_unlock_irq(&mac->lock);

	r = zd_read_regdomain(chip, &default_regdomain);
	if (r)
		goto disable_int;
	if (!zd_regdomain_supported(default_regdomain)) {
		dev_dbg_f(zd_mac_dev(mac),
			  "Regulatory Domain %#04x is not supported.\n",
		          default_regdomain);
		r = -EINVAL;
		goto disable_int;
	}
	spin_lock_irq(&mac->lock);
	mac->regdomain = mac->default_regdomain = default_regdomain;
	spin_unlock_irq(&mac->lock);
	r = reset_channel(mac);
	if (r)
		goto disable_int;

	/* We must inform the device that we are doing encryption/decryption in
	 * software at the moment. */
	<