prism2mgmt.c

uClinux2.6上兼容PRISM2.0芯片组的USB设备驱动程序.

/* src/prism2/driver/prism2mgmt.c
*
* Management request handler functions.
*
* Copyright (C) 1999 AbsoluteValue Systems, Inc.  All Rights Reserved.
* --------------------------------------------------------------------
*
* linux-wlan
*
*   The contents of this file are subject to the Mozilla Public
*   License Version 1.1 (the "License"); you may not use this file
*   except in compliance with the License. You may obtain a copy of
*   the License at http://www.mozilla.org/MPL/
*
*   Software distributed under the License is distributed on an "AS
*   IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
*   implied. See the License for the specific language governing
*   rights and limitations under the License.
*
*   Alternatively, the contents of this file may be used under the
*   terms of the GNU Public License version 2 (the "GPL"), in which
*   case the provisions of the GPL are applicable instead of the
*   above.  If you wish to allow the use of your version of this file
*   only under the terms of the GPL and not to allow others to use
*   your version of this file under the MPL, indicate your decision
*   by deleting the provisions above and replace them with the notice
*   and other provisions required by the GPL.  If you do not delete
*   the provisions above, a recipient may use your version of this
*   file under either the MPL or the GPL.
*
* --------------------------------------------------------------------
*
* Inquiries regarding the linux-wlan Open Source project can be
* made directly to:
*
* AbsoluteValue Systems Inc.
* [e-mail]
* http://www.linux-wlan.com
*
* --------------------------------------------------------------------
*
* Portions of the development of this software were funded by 
* Intersil Corporation as part of PRISM(R) chipset product development.
*
* --------------------------------------------------------------------
*
* The functions in this file handle management requests sent from
* user mode.
*
* Most of these functions have two separate blocks of code that are
* conditional on whether this is a station or an AP.  This is used
* to separate out the STA and AP responses to these management primitives.
* It's a choice (good, bad, indifferent?) to have the code in the same 
* place so it's clear that the same primitive is implemented in both 
* cases but has different behavior.
*
* --------------------------------------------------------------------
*/

/*================================================================*/
/* System Includes */
#define WLAN_DBVAR	prism2_debug

#include <wlan/version.h>

#include <linux/config.h>
#include <linux/version.h>

#include <linux/if_arp.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/wait.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/wireless.h>
#include <linux/netdevice.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/byteorder.h>
#include <linux/random.h>

#if (WLAN_HOSTIF == WLAN_USB)
#include <linux/usb.h>
#endif

#if (WLAN_HOSTIF == WLAN_PCMCIA)
#include <pcmcia/version.h>
#include <pcmcia/cs_types.h>
#include <pcmcia/cs.h>
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
#include <pcmcia/cisreg.h>
#endif

#include <wlan/wlan_compat.h>

/*================================================================*/
/* Project Includes */

#include <wlan/p80211types.h>
#include <wlan/p80211hdr.h>
#include <wlan/p80211mgmt.h>
#include <wlan/p80211conv.h>
#include <wlan/p80211msg.h>
#include <wlan/p80211netdev.h>
#include <wlan/p80211metadef.h>
#include <wlan/p80211metastruct.h>
#include <prism2/hfa384x.h>
#include <prism2/prism2mgmt.h>

/*================================================================*/
/* Local Constants */


/*================================================================*/
/* Local Macros */

/* Converts 802.11 format rate specifications to prism2 */
#define p80211rate_to_p2bit(n)	((((n)&~BIT7) == 2) ? BIT0 : \
				 (((n)&~BIT7) == 4) ? BIT1 : \
				 (((n)&~BIT7) == 11) ? BIT2 : \
				 (((n)&~BIT7) == 22) ? BIT3 : 0)

/*================================================================*/
/* Local Types */


/*================================================================*/
/* Local Static Definitions */


/*================================================================*/
/* Local Function Declarations */


/*================================================================*/
/* Function Definitions */


/*----------------------------------------------------------------
* prism2mgmt_powermgmt
*
* Set the power management state of this station's MAC.
*
* Arguments:
*	wlandev		wlan device structure
*	msgp		ptr to msg buffer
*
* Returns: 
*	0	success and done
*	<0	success, but we're waiting for something to finish.
*	>0	an error occurred while handling the message.
* Side effects:
*
* Call context:
*	process thread  (usually)
*	interrupt
----------------------------------------------------------------*/
int prism2mgmt_powermgmt(wlandevice_t *wlandev, void *msgp)
{
	int 			result = 0;
	hfa384x_t		*hw = wlandev->priv;
	p80211msg_dot11req_powermgmt_t	*msg = msgp;

	DBFENTER;

	if (!hw->ap) {

		/*** STATION ***/

		/*
		 * Set CNFPMENABLED (on or off)
		 * Set CNFMULTICASTRX (if PM on, otherwise clear)
		 * Spout a notice stating that SleepDuration and
		 * HoldoverDuration and PMEPS also have an impact.
		 */
		/* Powermgmt is currently unsupported for STA */
		msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
		msg->resultcode.data = P80211ENUM_resultcode_not_supported;
	} else {

		/*** ACCESS POINT ***/

		/* Powermgmt is never supported for AP */
		msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;
		msg->resultcode.data = P80211ENUM_resultcode_not_supported;
	}

	DBFEXIT;
	return result;
}


/*----------------------------------------------------------------
* prism2mgmt_scan
*
* Initiate a scan for BSSs.
*
* This function corresponds to MLME-scan.request and part of 
* MLME-scan.confirm.  As far as I can tell in the standard, there
* are no restrictions on when a scan.request may be issued.  We have
* to handle in whatever state the driver/MAC happen to be.
*
* Arguments:
*	wlandev		wlan device structure
*	msgp		ptr to msg buffer
*
* Returns: 
*	0	success and done
*	<0	success, but we're waiting for something to finish.
*	>0	an error occurred while handling the message.
* Side effects:
*
* Call context:
*	process thread  (usually)
*	interrupt
----------------------------------------------------------------*/
int prism2mgmt_scan(wlandevice_t *wlandev, void *msgp)
{
	int 			result = 0;
	hfa384x_t		*hw = wlandev->priv;
	p80211msg_dot11req_scan_t	*msg = msgp;
        UINT16                  roamingmode, word;
	int                     i, timeout;
	int                     istmpenable = 0;

        hfa384x_HostScanRequest_data_t  scanreq;

	DBFENTER;

        if (hw->ap) {
                WLAN_LOG_ERROR("Prism2 in AP mode cannot perform scans.\n");
                result = 1;
                msg->resultcode.data = P80211ENUM_resultcode_not_supported;
                goto exit;
        }

        /* gatekeeper check */
        if (HFA384x_FIRMWARE_VERSION(hw->ident_sta_fw.major,
                                     hw->ident_sta_fw.minor,
                                     hw->ident_sta_fw.variant) <
            HFA384x_FIRMWARE_VERSION(1,3,2)) { 
		WLAN_LOG_ERROR("HostScan not supported with current firmware (<1.3.2).\n");
                result = 1;
                msg->resultcode.data = P80211ENUM_resultcode_not_supported;
		goto exit;
	}

        memset(&scanreq, 0, sizeof(scanreq));

        /* save current roaming mode */
        result = hfa384x_drvr_getconfig16(hw,
                        HFA384x_RID_CNFROAMINGMODE, &roamingmode);
        if ( result ) {
                WLAN_LOG_ERROR("getconfig(ROAMMODE) failed. result=%d\n",
                                result);
                msg->resultcode.data =
                        P80211ENUM_resultcode_implementation_failure;
                goto exit;
        }

        /* drop into mode 3 for the scan */
        result = hfa384x_drvr_setconfig16(hw,
                        HFA384x_RID_CNFROAMINGMODE,
			HFA384x_ROAMMODE_HOSTSCAN_HOSTROAM);
        if ( result ) {
                WLAN_LOG_ERROR("setconfig(ROAMINGMODE) failed. result=%d\n",
                                result);
                msg->resultcode.data =
                        P80211ENUM_resultcode_implementation_failure;
                goto exit;
        }

        /* active or passive? */
        if (HFA384x_FIRMWARE_VERSION(hw->ident_sta_fw.major,
                                     hw->ident_sta_fw.minor,
                                     hw->ident_sta_fw.variant) >
            HFA384x_FIRMWARE_VERSION(1,5,0)) { 
                if (msg->scantype.data != P80211ENUM_scantype_active) {
                        word = host2hfa384x_16(msg->maxchanneltime.data);
                } else {
                        word = 0;
                }
                result = hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFPASSIVESCANCTRL, word);
                if ( result ) {
                        WLAN_LOG_WARNING("Passive scan not supported with "
					  "current firmware.  (<1.5.1)\n");
                }
        }

	/* set up the txrate to be 2MBPS. Should be fastest basicrate... */
	word = HFA384x_RATEBIT_2;
	scanreq.txRate = host2hfa384x_16(word);

        /* set up the channel list */
        word = 0;
        for (i = 0; i < msg->channellist.data.len; i++) {
                UINT8 channel = msg->channellist.data.data[i];
                if (channel > 14) continue;
                /* channel 1 is BIT0 ... channel 14 is BIT13 */
                word |= (1 << (channel-1));
        }
        scanreq.channelList = host2hfa384x_16(word);

        /* set up the ssid, if present. */
        scanreq.ssid.len = host2hfa384x_16(msg->ssid.data.len);
        memcpy(scanreq.ssid.data, msg->ssid.data.data, msg->ssid.data.len);

	/* Enable the MAC port if it's not already enabled  */
	result = hfa384x_drvr_getconfig16(hw, HFA384x_RID_PORTSTATUS, &word);
	if ( result ) {
		WLAN_LOG_ERROR("getconfig(PORTSTATUS) failed. "
				"result=%d\n", result);
		msg->resultcode.data =
			P80211ENUM_resultcode_implementation_failure;
		goto exit;
	}
	if (word == HFA384x_PORTSTATUS_DISABLED) {
		UINT16 wordbuf[17];

		result = hfa384x_drvr_setconfig16(hw,
			HFA384x_RID_CNFROAMINGMODE,
			HFA384x_ROAMMODE_HOSTSCAN_HOSTROAM);
		if ( result ) {
			WLAN_LOG_ERROR("setconfig(ROAMINGMODE) failed. result=%d\n", result);
			msg->resultcode.data =
				P80211ENUM_resultcode_implementation_failure;
			goto exit;
		}
		/* Construct a bogus SSID and assign it to OwnSSID and
		 * DesiredSSID
		 */
		wordbuf[0] = host2hfa384x_16(WLAN_SSID_MAXLEN);
		get_random_bytes(&wordbuf[1], WLAN_SSID_MAXLEN);
		result = hfa384x_drvr_setconfig( hw, HFA384x_RID_CNFOWNSSID,
				wordbuf, HFA384x_RID_CNFOWNSSID_LEN);
		if ( result ) {
			WLAN_LOG_ERROR("Failed to set OwnSSID.\n");
			msg->resultcode.data =
				P80211ENUM_resultcode_implementation_failure;
			goto exit;
		}
		result = hfa384x_drvr_setconfig( hw, HFA384x_RID_CNFDESIREDSSID,
				wordbuf, HFA384x_RID_CNFDESIREDSSID_LEN);
		if ( result ) {
			WLAN_LOG_ERROR("Failed to set DesiredSSID.\n");
			msg->resultcode.data =
				P80211ENUM_resultcode_implementation_failure;
			goto exit;
		}
		/* bsstype */
		result = hfa384x_drvr_setconfig16(hw,
				HFA384x_RID_CNFPORTTYPE,
				HFA384x_PORTTYPE_IBSS);
		if ( result ) {
			WLAN_LOG_ERROR("Failed to set CNFPORTTYPE.\n");
			msg->resultcode.data =
				P80211ENUM_resultcode_implementation_failure;
			goto exit;
		}
		/* ibss options */
		result = hfa384x_drvr_setconfig16(hw,
				HFA384x_RID_CREATEIBSS,
				HFA384x_CREATEIBSS_JOINCREATEIBSS);
		if ( result ) {
			WLAN_LOG_ERROR("Failed to set CREATEIBSS.\n");
			msg->resultcode.data =
				P80211ENUM_resultcode_implementation_failure;
			goto exit;
		}
		result = hfa384x_drvr_enable(hw, 0);
		if ( result ) {
			WLAN_LOG_ERROR("drvr_enable(0) failed. "
					"result=%d\n", result);
			msg->resultcode.data =
			P80211ENUM_resultcode_implementation_failure;
			goto exit;
		}
		istmpenable = 1;
	}

        /* Figure out our timeout first Kus, then HZ */
        timeout = msg->channellist.data.len * msg->maxchanneltime.data;
	timeout = (timeout * HZ)/1000;

        /* Issue the scan request */
        hw->scanflag = 0;

	WLAN_HEX_DUMP(5,"hscanreq", &scanreq, sizeof(scanreq));

        result = hfa384x_drvr_setconfig( hw,
                        HFA384x_RID_HOSTSCAN, &scanreq,
                        sizeof(hfa384x_HostScanRequest_data_t));
        if ( result ) {
                WLAN_LOG_ERROR("setconfig(SCANREQUEST) failed. result=%d\n",
                                result);
                msg->resultcode.data =
                        P80211ENUM_resultcode_implementation_failure;
                goto exit;
        }

        /* sleep until info frame arrives */
        wait_event_interruptible_timeout(hw->cmdq, hw->scanflag, timeout);

	msg->numbss.status = P80211ENUM_msgitem_status_data_ok;
	if (hw->scanflag == -1)
		hw->scanflag = 0;

	msg->numbss.data = hw->scanflag;

        hw->scanflag = 0;

	/* Disable port if we temporarily enabled it. */
	if (istmpenable) {
		result = hfa384x_drvr_disable(hw, 0);
		if ( result ) {
			WLAN_LOG_ERROR("drvr_disable(0) failed. "
					"result=%d\n", result);
			msg->resultcode.data =
			P80211ENUM_resultcode_implementation_failure;
			goto exit;
		}
	}

	/* restore original roaming mode */
	result = hfa384x_drvr_setconfig16(hw, HFA384x_RID_CNFROAMINGMODE,
					  roamingmode);
        if ( result ) {
                WLAN_LOG_ERROR("setconfig(ROAMMODE) failed. result=%d\n",
                                result);
                msg->resultcode.data =
                        P80211ENUM_resultcode_implementation_failure;
                goto exit;
        }

        result = 0;
        msg->resultcode.data = P80211ENUM_resultcode_success;

 exit:
	msg->resultcode.status = P80211ENUM_msgitem_status_data_ok;

	DBFEXIT;
	return result;
}


/*----------------------------------------------------------------
* prism2mgmt_scan_results
*
* Retrieve the BSS description for one of the BSSs identified in
* a scan.
*
* Arguments: