int zd_mac_stop(struct net_device *netdev)
{
struct zd_mac *mac = zd_netdev_mac(netdev);
struct zd_chip *chip = &mac->chip;
netif_stop_queue(netdev);
/*
* The order here deliberately is a little different from the open()
* method, since we need to make sure there is no opportunity for RX
* frames to be processed by softmac after we have stopped it.
*/
zd_chip_disable_rx(chip);
skb_queue_purge(&mac->rx_queue);
tasklet_disable(&mac->rx_tasklet);
housekeeping_disable(mac);
ieee80211softmac_stop(netdev);
/* Ensure no work items are running or queued from this point */
cancel_delayed_work(&mac->set_rts_cts_work);
cancel_delayed_work(&mac->set_basic_rates_work);
flush_workqueue(zd_workqueue);
mac->updating_rts_rate = 0;
mac->updating_basic_rates = 0;
zd_chip_disable_hwint(chip);
zd_chip_switch_radio_off(chip);
zd_chip_disable_int(chip);
return 0;
}
static int zd_op_start(struct ieee80211_hw *hw)
{
struct zd_mac *mac = zd_hw_mac(hw);
struct zd_chip *chip = &mac->chip;
struct zd_usb *usb = &chip->usb;
int r;
if (!usb->initialized) {
r = zd_usb_init_hw(usb);
if (r)
goto out;
}
r = zd_chip_enable_int(chip);
if (r < 0)
goto out;
r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G);
if (r < 0)
goto disable_int;
r = set_rx_filter(mac);
if (r)
goto disable_int;
r = set_mc_hash(mac);
if (r)
goto disable_int;
r = zd_chip_switch_radio_on(chip);
if (r < 0)
goto disable_int;
r = zd_chip_enable_rxtx(chip);
if (r < 0)
goto disable_radio;
r = zd_chip_enable_hwint(chip);
if (r < 0)
goto disable_rxtx;
housekeeping_enable(mac);
return 0;
disable_rxtx:
zd_chip_disable_rxtx(chip);
disable_radio:
zd_chip_switch_radio_off(chip);
disable_int:
zd_chip_disable_int(chip);
out:
return r;
}
int zd_mac_open(struct net_device *netdev)
{
struct zd_mac *mac = zd_netdev_mac(netdev);
struct zd_chip *chip = &mac->chip;
int r;
tasklet_enable(&mac->rx_tasklet);
r = zd_chip_enable_int(chip);
if (r < 0)
goto out;
r = zd_chip_set_basic_rates(chip, CR_RATES_80211B | CR_RATES_80211G);
if (r < 0)
goto disable_int;
r = reset_mode(mac);
if (r)
goto disable_int;
r = zd_chip_switch_radio_on(chip);
if (r < 0)
goto disable_int;
r = zd_chip_set_channel(chip, mac->requested_channel);
if (r < 0)
goto disable_radio;
r = zd_chip_enable_rx(chip);
if (r < 0)
goto disable_radio;
r = zd_chip_enable_hwint(chip);
if (r < 0)
goto disable_rx;
housekeeping_enable(mac);
ieee80211softmac_start(netdev);
return 0;
disable_rx:
zd_chip_disable_rx(chip);
disable_radio:
zd_chip_switch_radio_off(chip);
disable_int:
zd_chip_disable_int(chip);
out:
return r;
}
static void zd_op_stop(struct ieee80211_hw *hw)
{
struct zd_mac *mac = zd_hw_mac(hw);
struct zd_chip *chip = &mac->chip;
struct sk_buff *skb;
struct sk_buff_head *ack_wait_queue = &mac->ack_wait_queue;
/* The order here deliberately is a little different from the open()
* method, since we need to make sure there is no opportunity for RX
* frames to be processed by mac80211 after we have stopped it.
*/
zd_chip_disable_rxtx(chip);
housekeeping_disable(mac);
flush_workqueue(zd_workqueue);
zd_chip_disable_hwint(chip);
zd_chip_switch_radio_off(chip);
zd_chip_disable_int(chip);
while ((skb = skb_dequeue(ack_wait_queue)))
kfree_tx_skb(skb);
}
