ipw2200.c

和我之前上载的intel 802.11协议源码是配套的

}

static DEVICE_ATTR(net_stats, S_IWUSR | S_IRUGO,
		   show_net_stats, store_net_stats);

static void notify_wx_assoc_event(struct ipw_priv *priv)
{
	union iwreq_data wrqu;
	wrqu.ap_addr.sa_family = ARPHRD_ETHER;
	if (priv->status & STATUS_ASSOCIATED)
		memcpy(wrqu.ap_addr.sa_data, priv->bssid, ETH_ALEN);
	else
		memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
	wireless_send_event(priv->net_dev, SIOCGIWAP, &wrqu, NULL);
}

static void ipw_irq_tasklet(struct ipw_priv *priv)
{
	u32 inta, inta_mask, handled = 0;
	unsigned long flags;
	int rc = 0;

	spin_lock_irqsave(&priv->irq_lock, flags);

	inta = ipw_read32(priv, IPW_INTA_RW);
	inta_mask = ipw_read32(priv, IPW_INTA_MASK_R);
	inta &= (IPW_INTA_MASK_ALL & inta_mask);

	/* Add any cached INTA values that need to be handled */
	inta |= priv->isr_inta;

	spin_unlock_irqrestore(&priv->irq_lock, flags);

	spin_lock_irqsave(&priv->lock, flags);

	/* handle all the justifications for the interrupt */
	if (inta & IPW_INTA_BIT_RX_TRANSFER) {
		ipw_rx(priv);
		handled |= IPW_INTA_BIT_RX_TRANSFER;
	}

	if (inta & IPW_INTA_BIT_TX_CMD_QUEUE) {
		IPW_DEBUG_HC("Command completed.\n");
		rc = ipw_queue_tx_reclaim(priv, &priv->txq_cmd, -1);
		priv->status &= ~STATUS_HCMD_ACTIVE;
		wake_up_interruptible(&priv->wait_command_queue);
		handled |= IPW_INTA_BIT_TX_CMD_QUEUE;
	}

	if (inta & IPW_INTA_BIT_TX_QUEUE_1) {
		IPW_DEBUG_TX("TX_QUEUE_1\n");
		rc = ipw_queue_tx_reclaim(priv, &priv->txq[0], 0);
		handled |= IPW_INTA_BIT_TX_QUEUE_1;
	}

	if (inta & IPW_INTA_BIT_TX_QUEUE_2) {
		IPW_DEBUG_TX("TX_QUEUE_2\n");
		rc = ipw_queue_tx_reclaim(priv, &priv->txq[1], 1);
		handled |= IPW_INTA_BIT_TX_QUEUE_2;
	}

	if (inta & IPW_INTA_BIT_TX_QUEUE_3) {
		IPW_DEBUG_TX("TX_QUEUE_3\n");
		rc = ipw_queue_tx_reclaim(priv, &priv->txq[2], 2);
		handled |= IPW_INTA_BIT_TX_QUEUE_3;
	}

	if (inta & IPW_INTA_BIT_TX_QUEUE_4) {
		IPW_DEBUG_TX("TX_QUEUE_4\n");
		rc = ipw_queue_tx_reclaim(priv, &priv->txq[3], 3);
		handled |= IPW_INTA_BIT_TX_QUEUE_4;
	}

	if (inta & IPW_INTA_BIT_STATUS_CHANGE) {
		IPW_WARNING("STATUS_CHANGE\n");
		handled |= IPW_INTA_BIT_STATUS_CHANGE;
	}

	if (inta & IPW_INTA_BIT_BEACON_PERIOD_EXPIRED) {
		IPW_WARNING("TX_PERIOD_EXPIRED\n");
		handled |= IPW_INTA_BIT_BEACON_PERIOD_EXPIRED;
	}

	if (inta & IPW_INTA_BIT_SLAVE_MODE_HOST_CMD_DONE) {
		IPW_WARNING("HOST_CMD_DONE\n");
		handled |= IPW_INTA_BIT_SLAVE_MODE_HOST_CMD_DONE;
	}

	if (inta & IPW_INTA_BIT_FW_INITIALIZATION_DONE) {
		IPW_WARNING("FW_INITIALIZATION_DONE\n");
		handled |= IPW_INTA_BIT_FW_INITIALIZATION_DONE;
	}

	if (inta & IPW_INTA_BIT_FW_CARD_DISABLE_PHY_OFF_DONE) {
		IPW_WARNING("PHY_OFF_DONE\n");
		handled |= IPW_INTA_BIT_FW_CARD_DISABLE_PHY_OFF_DONE;
	}

	if (inta & IPW_INTA_BIT_RF_KILL_DONE) {
		IPW_DEBUG_RF_KILL("RF_KILL_DONE\n");
		priv->status |= STATUS_RF_KILL_HW;
		wake_up_interruptible(&priv->wait_command_queue);
		priv->status &= ~(STATUS_ASSOCIATED | STATUS_ASSOCIATING);
		cancel_delayed_work(&priv->request_scan);
		schedule_work(&priv->link_down);
		queue_delayed_work(priv->workqueue, &priv->rf_kill, 2 * HZ);
		handled |= IPW_INTA_BIT_RF_KILL_DONE;
	}

	if (inta & IPW_INTA_BIT_FATAL_ERROR) {
		IPW_WARNING("Firmware error detected.  Restarting.\n");
		if (priv->error) {
			IPW_DEBUG_FW("Sysfs 'error' log already exists.\n");
			if (ipw_debug_level & IPW_DL_FW_ERRORS) {
				struct ipw_fw_error *error =
				    ipw_alloc_error_log(priv);
				ipw_dump_error_log(priv, error);
				kfree(error);
			}
		} else {
			priv->error = ipw_alloc_error_log(priv);
			if (priv->error)
				IPW_DEBUG_FW("Sysfs 'error' log captured.\n");
			else
				IPW_DEBUG_FW("Error allocating sysfs 'error' "
					     "log.\n");
			if (ipw_debug_level & IPW_DL_FW_ERRORS)
				ipw_dump_error_log(priv, priv->error);
		}

		/* XXX: If hardware encryption is for WPA/WPA2,
		 * we have to notify the supplicant. */
		if (priv->ieee->sec.encrypt) {
			priv->status &= ~STATUS_ASSOCIATED;
			notify_wx_assoc_event(priv);
		}

		/* Keep the restart process from trying to send host
		 * commands by clearing the INIT status bit */
		priv->status &= ~STATUS_INIT;

		/* Cancel currently queued command. */
		priv->status &= ~STATUS_HCMD_ACTIVE;
		wake_up_interruptible(&priv->wait_command_queue);

		queue_work(priv->workqueue, &priv->adapter_restart);
		handled |= IPW_INTA_BIT_FATAL_ERROR;
	}

	if (inta & IPW_INTA_BIT_PARITY_ERROR) {
		IPW_ERROR("Parity error\n");
		handled |= IPW_INTA_BIT_PARITY_ERROR;
	}

	if (handled != inta) {
		IPW_ERROR("Unhandled INTA bits 0x%08x\n", inta & ~handled);
	}

	spin_unlock_irqrestore(&priv->lock, flags);

	/* enable all interrupts */
	ipw_enable_interrupts(priv);
}

#define IPW_CMD(x) case IPW_CMD_ ## x : return #x
static char *get_cmd_string(u8 cmd)
{
	switch (cmd) {
		IPW_CMD(HOST_COMPLETE);
		IPW_CMD(POWER_DOWN);
		IPW_CMD(SYSTEM_CONFIG);
		IPW_CMD(MULTICAST_ADDRESS);
		IPW_CMD(SSID);
		IPW_CMD(ADAPTER_ADDRESS);
		IPW_CMD(PORT_TYPE);
		IPW_CMD(RTS_THRESHOLD);
		IPW_CMD(FRAG_THRESHOLD);
		IPW_CMD(POWER_MODE);
		IPW_CMD(WEP_KEY);
		IPW_CMD(TGI_TX_KEY);
		IPW_CMD(SCAN_REQUEST);
		IPW_CMD(SCAN_REQUEST_EXT);
		IPW_CMD(ASSOCIATE);
		IPW_CMD(SUPPORTED_RATES);
		IPW_CMD(SCAN_ABORT);
		IPW_CMD(TX_FLUSH);
		IPW_CMD(QOS_PARAMETERS);
		IPW_CMD(DINO_CONFIG);
		IPW_CMD(RSN_CAPABILITIES);
		IPW_CMD(RX_KEY);
		IPW_CMD(CARD_DISABLE);
		IPW_CMD(SEED_NUMBER);
		IPW_CMD(TX_POWER);
		IPW_CMD(COUNTRY_INFO);
		IPW_CMD(AIRONET_INFO);
		IPW_CMD(AP_TX_POWER);
		IPW_CMD(CCKM_INFO);
		IPW_CMD(CCX_VER_INFO);
		IPW_CMD(SET_CALIBRATION);
		IPW_CMD(SENSITIVITY_CALIB);
		IPW_CMD(RETRY_LIMIT);
		IPW_CMD(IPW_PRE_POWER_DOWN);
		IPW_CMD(VAP_BEACON_TEMPLATE);
		IPW_CMD(VAP_DTIM_PERIOD);
		IPW_CMD(EXT_SUPPORTED_RATES);
		IPW_CMD(VAP_LOCAL_TX_PWR_CONSTRAINT);
		IPW_CMD(VAP_QUIET_INTERVALS);
		IPW_CMD(VAP_CHANNEL_SWITCH);
		IPW_CMD(VAP_MANDATORY_CHANNELS);
		IPW_CMD(VAP_CELL_PWR_LIMIT);
		IPW_CMD(VAP_CF_PARAM_SET);
		IPW_CMD(VAP_SET_BEACONING_STATE);
		IPW_CMD(MEASUREMENT);
		IPW_CMD(POWER_CAPABILITY);
		IPW_CMD(SUPPORTED_CHANNELS);
		IPW_CMD(TPC_REPORT);
		IPW_CMD(WME_INFO);
		IPW_CMD(PRODUCTION_COMMAND);
	default:
		return "UNKNOWN";
	}
}

#define HOST_COMPLETE_TIMEOUT HZ

static int __ipw_send_cmd(struct ipw_priv *priv, struct host_cmd *cmd)
{
	int rc = 0;
	unsigned long flags;

	spin_lock_irqsave(&priv->lock, flags);
	if (priv->status & STATUS_HCMD_ACTIVE) {
		IPW_ERROR("Failed to send %s: Already sending a command.\n",
			  get_cmd_string(cmd->cmd));
		spin_unlock_irqrestore(&priv->lock, flags);
		return -EAGAIN;
	}

	priv->status |= STATUS_HCMD_ACTIVE;

	if (priv->cmdlog) {
		priv->cmdlog[priv->cmdlog_pos].jiffies = jiffies;
		priv->cmdlog[priv->cmdlog_pos].cmd.cmd = cmd->cmd;
		priv->cmdlog[priv->cmdlog_pos].cmd.len = cmd->len;
		memcpy(priv->cmdlog[priv->cmdlog_pos].cmd.param, cmd->param,
		       cmd->len);
		priv->cmdlog[priv->cmdlog_pos].retcode = -1;
	}

	IPW_DEBUG_HC("%s command (#%d) %d bytes: 0x%08X\n",
		     get_cmd_string(cmd->cmd), cmd->cmd, cmd->len,
		     priv->status);

#ifndef DEBUG_CMD_WEP_KEY
	if (cmd->cmd == IPW_CMD_WEP_KEY)
		IPW_DEBUG_HC("WEP_KEY command masked out for secure.\n");
	else
#endif
		printk_buf(IPW_DL_HOST_COMMAND, (u8 *) cmd->param, cmd->len);

	rc = ipw_queue_tx_hcmd(priv, cmd->cmd, cmd->param, cmd->len, 0);
	if (rc) {
		priv->status &= ~STATUS_HCMD_ACTIVE;
		IPW_ERROR("Failed to send %s: Reason %d\n",
			  get_cmd_string(cmd->cmd), rc);
		spin_unlock_irqrestore(&priv->lock, flags);
		goto exit;
	}
	spin_unlock_irqrestore(&priv->lock, flags);

	rc = wait_event_interruptible_timeout(priv->wait_command_queue,
					      !(priv->
						status & STATUS_HCMD_ACTIVE),
					      HOST_COMPLETE_TIMEOUT);
	if (rc == 0) {
		spin_lock_irqsave(&priv->lock, flags);
		if (priv->status & STATUS_HCMD_ACTIVE) {
			IPW_ERROR("Failed to send %s: Command timed out.\n",
				  get_cmd_string(cmd->cmd));
			priv->status &= ~STATUS_HCMD_ACTIVE;
			spin_unlock_irqrestore(&priv->lock, flags);
			rc = -EIO;
			goto exit;
		}
		spin_unlock_irqrestore(&priv->lock, flags);
	} else
		rc = 0;

	if (priv->status & STATUS_RF_KILL_HW) {
		IPW_ERROR("Failed to send %s: Aborted due to RF kill switch.\n",
			  get_cmd_string(cmd->cmd));
		rc = -EIO;
		goto exit;
	}

      exit:
	if (priv->cmdlog) {
		priv->cmdlog[priv->cmdlog_pos++].retcode = rc;
		priv->cmdlog_pos %= priv->cmdlog_len;
	}
	return rc;
}

static int ipw_send_cmd_simple(struct ipw_priv *priv, u8 command)
{
	struct host_cmd cmd = {
		.cmd = command,
	};

	return __ipw_send_cmd(priv, &cmd);
}

static int ipw_send_cmd_pdu(struct ipw_priv *priv, u8 command, u8 len,
			    void *data)
{
	struct host_cmd cmd = {
		.cmd = command,
		.len = len,
		.param = data,
	};

	return __ipw_send_cmd(priv, &cmd);
}

static int ipw_send_host_complete(struct ipw_priv *priv)
{
	if (!priv) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	return ipw_send_cmd_simple(priv, IPW_CMD_HOST_COMPLETE);
}

static int ipw_send_system_config(struct ipw_priv *priv)
{
	return ipw_send_cmd_pdu(priv, IPW_CMD_SYSTEM_CONFIG,
				sizeof(priv->sys_config), &priv->sys_config);
}

static int ipw_send_ssid(struct ipw_priv *priv, u8 * ssid, int len)
{
	if (!priv || !ssid) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	return ipw_send_cmd_pdu(priv, IPW_CMD_SSID, min(len, IW_ESSID_MAX_SIZE),
				ssid);
}

static int ipw_send_adapter_address(struct ipw_priv *priv, u8 * mac)
{
	if (!priv || !mac) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	IPW_DEBUG_INFO("%s: Setting MAC to " MAC_FMT "\n",
		       priv->net_dev->name, MAC_ARG(mac));

	return ipw_send_cmd_pdu(priv, IPW_CMD_ADAPTER_ADDRESS, ETH_ALEN, mac);
}

/*
 * NOTE: This must be executed from our workqueue as it results in udelay
 * being called which may corrupt the keyboard if executed on default
 * workqueue
 */
static void ipw_adapter_restart(void *adapter)
{
	struct ipw_priv *priv = adapter;

	if (priv->status & STATUS_RF_KILL_MASK)
		return;

	ipw_down(priv);

	if (priv->assoc_network &&
	    (priv->assoc_network->capability & WLAN_CAPABILITY_IBSS))
		ipw_remove_current_network(priv);

	if (ipw_up(priv)) {
		IPW_ERROR("Failed to up device\n");
		return;
	}
}

static void ipw_bg_adapter_restart(void *data)
{
	struct ipw_priv *priv = data;
	mutex_lock(&priv->mutex);
	ipw_adapter_restart(data);
	mutex_unlock(&priv->mutex);
}

#define IPW_SCAN_CHECK_WATCHDOG (5 * HZ)

static void ipw_scan_check(void *data)
{
	struct ipw_priv *priv = data;
	if (priv->status & (STATUS_SCANNING | STATUS_SCAN_ABORTING)) {
		IPW_DEBUG_SCAN("Scan completion watchdog resetting "
			       "adapter after (%dms).\n",
			       jiffies_to_msecs(IPW_SCAN_CHECK_WATCHDOG));
		queue_work(priv->workqueue, &priv->adapter_restart);
	}
}

static void ipw_bg_scan_check(void *data)
{
	struct ipw_priv *priv = data;
	mutex_lock(&priv->mutex);
	ipw_scan_check(data);
	mutex_unlock(&priv->mutex);
}

static int ipw_send_scan_request_ext(struct ipw_priv *priv,
				     struct ipw_scan_request_ext *request)
{
	return ipw_send_cmd_pdu(priv, IPW_CMD_SCAN_REQUEST_EXT,
				sizeof(*request), request);
}

static int ipw_send_scan_abort(struct ipw_priv *priv)
{
	if (!priv) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	return ipw_send_cmd_simple(priv, IPW_CMD_SCAN_ABORT);
}

static int ipw_set_sensitivity(struct ipw_priv *priv, u16 sens)
{
	struct ipw_sensitivity_calib calib = {
		.beacon_rssi_raw = cpu_to_le16(sens),
	};

	return ipw_send_cmd_pdu(priv, IPW_CMD_SENSITIVITY_CALIB, sizeof(calib),
				&calib);
}

static int ipw_send_associate(struct ipw_priv *priv,
			      struct ipw_associate *associate)
{
	struct ipw_associate tmp_associate;

	if (!priv || !associate) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	memcpy(&tmp_associate, associate, sizeof(*associate));
	tmp_associate.policy_support =
	    cpu_to_le16(tmp_associate.policy_support);
	tmp_associate.assoc_tsf_msw = cpu_to_le32(tmp_associate.assoc_tsf_msw);
	tmp_associate.assoc_tsf_lsw = cpu_to_le32(tmp_associate.assoc_tsf_lsw);
	tmp_associate.capability = cpu_to_le16(tmp_associate.capability);
	tmp_associate.listen_interval =
	    cpu_to_le16(tmp_associate.listen_interval);
	tmp_associate.beacon_interval =
	    cpu_to_le16(tmp_associate.beacon_interval);
	tmp_associate.atim_window = cpu_to_le16(tmp_associate.atim_window);

	return ipw_send_cmd_pdu(priv, IPW_CMD_ASSOCIATE, sizeof(tmp_associate),
				&tmp_associate);
}

static int ipw_send_supported_rates(struct ipw_priv *priv,
				    struct ipw_supported_rates *rates)
{
	if (!priv || !rates) {
		IPW_ERROR("Invalid args\n");
		return -1;
	}

	return ipw_send_cmd_pdu(priv, IPW_CMD_SUPPORTED_RATES, sizeof(*rates),
				rates);
}

static int ipw_set_r