airo.c

Linux下的PCMCIA接口的无线网卡驱动程序

        u16 probeResponseTimeout;
	u16 beaconListenTimeout;
	u16 joinNetTimeout;
	u16 authTimeout;
	u16 authType;
#define AUTH_OPEN 0x1
#define AUTH_ENCRYPT 0x101
#define AUTH_SHAREDKEY 0x102
#define AUTH_ALLOW_UNENCRYPTED 0x200
	u16 associationTimeout;
	u16 specifiedApTimeout;
	u16 offlineScanInterval;
	u16 offlineScanDuration;
	u16 linkLossDelay;
	u16 maxBeaconLostTime;
	u16 refreshInterval;
#define DISABLE_REFRESH 0xFFFF
	u16 _reserved1a[1];
	/*---------- Power save operation ----------*/
	u16 powerSaveMode;
#define POWERSAVE_CAM 0
#define POWERSAVE_PSP 1
#define POWERSAVE_PSPCAM 2
	u16 sleepForDtims;
	u16 listenInterval;
	u16 fastListenInterval;
	u16 listenDecay;
	u16 fastListenDelay;
	u16 _reserved2[2];
	/*---------- Ap/Ibss config items ----------*/
	u16 beaconPeriod;
	u16 atimDuration;
	u16 hopPeriod;
	u16 channelSet;
	u16 channel;
	u16 dtimPeriod;
	u16 bridgeDistance;
	u16 radioID;
	/*---------- Radio configuration ----------*/
	u16 radioType;
#define RADIOTYPE_DEFAULT 0
#define RADIOTYPE_802_11 1
#define RADIOTYPE_LEGACY 2
	u8 rxDiversity;
	u8 txDiversity;
	u16 txPower;
#define TXPOWER_DEFAULT 0
	u16 rssiThreshold;
#define RSSI_DEFAULT 0
        u16 modulation;
#define PREAMBLE_AUTO 0
#define PREAMBLE_LONG 1
#define PREAMBLE_SHORT 2
	u16 preamble;
	u16 homeProduct;
	u16 radioSpecific;
	/*---------- Aironet Extensions ----------*/
	u8 nodeName[16];
	u16 arlThreshold;
	u16 arlDecay;
	u16 arlDelay;
	u16 _reserved4[1];
	/*---------- Aironet Extensions ----------*/
	u16 magicAction;
#define MAGIC_ACTION_STSCHG 1
#define MACIC_ACTION_RESUME 2
#define MAGIC_IGNORE_MCAST (1<<8)
#define MAGIC_IGNORE_BCAST (1<<9)
#define MAGIC_SWITCH_TO_PSP (0<<10)
#define MAGIC_STAY_IN_CAM (1<<10)
	u16 magicControl;
	u16 autoWake;
} ConfigRid;

typedef struct {
	u16 len;
	u8 mac[6];
	u16 mode;
	u16 errorCode;
	u16 sigQuality;
	u16 SSIDlen;
	char SSID[32];
	char apName[16];
	char bssid[4][6];
	u16 beaconPeriod;
	u16 dimPeriod;
	u16 atimDuration;
	u16 hopPeriod;
	u16 channelSet;
	u16 channel;
	u16 hopsToBackbone;
	u16 apTotalLoad;
	u16 generatedLoad;
	u16 accumulatedArl;
	u16 signalQuality;
	u16 currentXmitRate;
	u16 apDevExtensions;
	u16 normalizedSignalStrength;
	u16 _reserved[10];
} StatusRid;

typedef struct {
	u16 len;
	u16 spacer;
	u32 vals[100];
} StatsRid;


typedef struct {
	u16 len;
	u8 ap[4][6];
} APListRid;

typedef struct {
	u16 len;
	char oui[3];
	char zero;
	u16 prodNum;
	char manName[32];
	char prodName[16];
	char prodVer[8];
	char factoryAddr[6];
	char aironetAddr[6];
	u16 radioType;
	u16 country;
	char callid[6];
	char supportedRates[8];
	char rxDiversity;
	char txDiversity;
	u16 txPowerLevels[8];
	u16 hardVer;
	u16 hardCap;
	u16 tempRange;
	u16 softVer;
	u16 softSubVer;
	u16 interfaceVer;
	u16 softCap;
	u16 bootBlockVer;
	u16 requiredHard;
} CapabilityRid;

typedef struct {
  u16 len;
  u16 index; /* First is 0 and 0xffff means end of list */
#define RADIO_FH 1 /* Frequency hopping radio type */
#define RADIO_DS 2 /* Direct sequence radio type */
#define RADIO_TMA 4 /* Proprietary radio used in old cards (2500) */
  u16 radioType;
  u8 bssid[6]; /* Mac address of the BSS */
  u8 zero;
  u8 ssidLen;
  u8 ssid[32];
  u16 rssi;
#define CAP_ESS (1<<0)
#define CAP_IBSS (1<<1)
#define CAP_PRIVACY (1<<4)
#define CAP_SHORTHDR (1<<5)
  u16 cap;
  u16 beaconInterval;
  u8 rates[8]; /* Same as rates for config rid */
  struct { /* For frequency hopping only */
    u16 dwell;
    u8 hopSet;
    u8 hopPattern;
    u8 hopIndex;
    u8 fill;
  } fh;
  u16 dsChannel;
  u16 atimWindow;
} BSSListRid;

typedef struct {
  u8 rssipct;
  u8 rssidBm;
} tdsRssiEntry;

typedef struct {
  u16 len;
  tdsRssiEntry x[256];
} tdsRssiRid;

#pragma pack()

#define TXCTL_TXOK (1<<1) /* report if tx is ok */
#define TXCTL_TXEX (1<<2) /* report if tx fails */
#define TXCTL_802_3 (0<<3) /* 802.3 packet */
#define TXCTL_802_11 (1<<3) /* 802.11 mac packet */
#define TXCTL_ETHERNET (0<<4) /* payload has ethertype */
#define TXCTL_LLC (1<<4) /* payload is llc */
#define TXCTL_RELEASE (0<<5) /* release after completion */
#define TXCTL_NORELEASE (1<<5) /* on completion returns to host */

#define BUSY_FID 0x10000

#ifdef CISCO_EXT
#define AIROMAGIC	0xa55a
/* Warning : SIOCDEVPRIVATE may disapear during 2.5.X - Jean II */
#ifdef SIOCIWFIRSTPRIV
#ifdef SIOCDEVPRIVATE
#define AIROOLDIOCTL	SIOCDEVPRIVATE
#define AIROOLDIDIFC 	AIROOLDIOCTL + 1
#endif /* SIOCDEVPRIVATE */
#else /* SIOCIWFIRSTPRIV */
#define SIOCIWFIRSTPRIV SIOCDEVPRIVATE
#endif /* SIOCIWFIRSTPRIV */
#define AIROIOCTL	SIOCIWFIRSTPRIV
#define AIROIDIFC 	AIROIOCTL + 1

/* Ioctl constants to be used in airo_ioctl.command */

#define	AIROGCAP  		0	// Capability rid
#define AIROGCFG		1       // USED A LOT
#define AIROGSLIST		2	// System ID list
#define AIROGVLIST		3       // List of specified AP's
#define AIROGDRVNAM		4	//  NOTUSED
#define AIROGEHTENC		5	// NOTUSED
#define AIROGWEPKTMP		6
#define AIROGWEPKNV		7
#define AIROGSTAT		8
#define AIROGSTATSC32		9
#define AIROGSTATSD32		10

/* Leave gap of 40 commands after AIROGSTATSD32 for future */

#define AIROPCAP               	AIROGSTATSD32 + 40
#define AIROPVLIST              AIROPCAP      + 1
#define AIROPSLIST		AIROPVLIST    + 1
#define AIROPCFG		AIROPSLIST    + 1
#define AIROPSIDS		AIROPCFG      + 1
#define AIROPAPLIST		AIROPSIDS     + 1
#define AIROPMACON		AIROPAPLIST   + 1	/* Enable mac  */
#define AIROPMACOFF		AIROPMACON    + 1 	/* Disable mac */
#define AIROPSTCLR		AIROPMACOFF   + 1
#define AIROPWEPKEY		AIROPSTCLR    + 1
#define AIROPWEPKEYNV		AIROPWEPKEY   + 1
#define AIROPLEAPPWD            AIROPWEPKEYNV + 1
#define AIROPLEAPUSR            AIROPLEAPPWD  + 1

/* Flash codes */

#define AIROFLSHRST	       AIROPWEPKEYNV  + 40
#define AIROFLSHGCHR           AIROFLSHRST    + 1
#define AIROFLSHSTFL           AIROFLSHGCHR   + 1
#define AIROFLSHPCHR           AIROFLSHSTFL   + 1
#define AIROFLPUTBUF           AIROFLSHPCHR   + 1
#define AIRORESTART            AIROFLPUTBUF   + 1

#define FLASHSIZE	32768

typedef struct aironet_ioctl {
	unsigned short command;	// What to do
	unsigned short len;		// Len of data
	unsigned char *data;		// d-data
} aironet_ioctl;
#endif /* CISCO_EXT */

#ifdef WIRELESS_EXT
// Frequency list (map channels to frequencies)
const long frequency_list[] = { 2412, 2417, 2422, 2427, 2432, 2437, 2442,
				2447, 2452, 2457, 2462, 2467, 2472, 2484 };

// A few details needed for WEP (Wireless Equivalent Privacy)
#define MAX_KEY_SIZE 13			// 128 (?) bits
#define MIN_KEY_SIZE  5			// 40 bits RC4 - WEP
typedef struct wep_key_t {
	u16	len;
	u8	key[16];	/* 40-bit and 104-bit keys */
} wep_key_t;
#endif /* WIRELESS_EXT */

static const char version[] = "airo.c 0.3 (Ben Reed & Javier Achirica)";

struct airo_info;

static int get_dec_u16( char *buffer, int *start, int limit );
static void OUT4500( struct airo_info *, u16 register, u16 value );
static unsigned short IN4500( struct airo_info *, u16 register );
static u16 setup_card(struct airo_info*, u8 *mac, ConfigRid *);
static void enable_interrupts(struct airo_info*);
static void disable_interrupts(struct airo_info*);
static u16 lock_issuecommand(struct airo_info*, Cmd *pCmd, Resp *pRsp);
static u16 issuecommand(struct airo_info*, Cmd *pCmd, Resp *pRsp);
static int bap_setup(struct airo_info*, u16 rid, u16 offset, int whichbap);
static int aux_bap_read(struct airo_info*, u16 *pu16Dst, int bytelen,
			int whichbap);
static int fast_bap_read(struct airo_info*, u16 *pu16Dst, int bytelen,
			 int whichbap);
static int bap_write(struct airo_info*, const u16 *pu16Src, int bytelen,
		     int whichbap);
static int PC4500_accessrid(struct airo_info*, u16 rid, u16 accmd);
static int PC4500_readrid(struct airo_info*, u16 rid, void *pBuf, int len);
static int PC4500_writerid(struct airo_info*, u16 rid, const void
			   *pBuf, int len);
static int do_writerid( struct airo_info*, u16 rid, const void *rid_data,
			int len );
static u16 transmit_allocate(struct airo_info*, int lenPayload);
static int transmit_802_3_packet(struct airo_info*, u16 TxFid, char
				 *pPacket, int len);

static void airo_interrupt( int irq, void* dev_id, struct pt_regs
			    *regs);
static int airo_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
#ifdef WIRELESS_EXT
struct iw_statistics *airo_get_wireless_stats (struct net_device *dev);
#endif /* WIRELESS_EXT */
#ifdef CISCO_EXT
static int readrids(struct net_device *dev, aironet_ioctl *comp);
static int writerids(struct net_device *dev, aironet_ioctl *comp);
int flashcard(struct net_device *dev, aironet_ioctl *comp);
#endif /* CISCO_EXT */

struct airo_info {
	struct net_device_stats	stats;
	int open;
	struct net_device             *dev;
	/* Note, we can have MAX_FIDS outstanding.  FIDs are 16-bits, so we
	   use the high bit to mark wether it is in use. */
#define MAX_FIDS 6
	int                           fids[MAX_FIDS];
	int registered;
	ConfigRid config;
	u16 authtype; // Used with auto_wep
	char keyindex; // Used with auto wep
	char defindex; // Used with auto wep
	struct timer_list timer;
	struct proc_dir_entry *proc_entry;
	struct airo_info *next;
        spinlock_t aux_lock;
        spinlock_t main_lock;
        int flags;
#define FLAG_PROMISC   IFF_PROMISC
#define FLAG_RADIO_OFF 0x02
	int (*bap_read)(struct airo_info*, u16 *pu16Dst, int bytelen,
			int whichbap);
	int (*header_parse)(struct sk_buff*, unsigned char *);
	unsigned short *flash;
	tdsRssiEntry *rssi;
#ifdef WIRELESS_EXT
	int			need_commit;	// Need to set config
	struct iw_statistics	wstats;		// wireless stats
#ifdef WIRELESS_SPY
	int			spy_number;
	u_char			spy_address[IW_MAX_SPY][6];
	struct iw_quality	spy_stat[IW_MAX_SPY];
#endif /* WIRELESS_SPY */
#endif /* WIRELESS_EXT */
};

static inline int bap_read(struct airo_info *ai, u16 *pu16Dst, int bytelen,
			   int whichbap) {
	return ai->bap_read(ai, pu16Dst, bytelen, whichbap);
}

static int setup_proc_entry( struct net_device *dev,
			     struct airo_info *apriv );
static int takedown_proc_entry( struct net_device *dev,
				struct airo_info *apriv );

static int readBSSListRid(struct airo_info *ai, int first,
		      BSSListRid *list) {
	int rc;
			Cmd cmd;
			Resp rsp;

	if (first == 1) {
			memset(&cmd, 0, sizeof(cmd));
			cmd.cmd=CMD_LISTBSS;
			lock_issuecommand(ai, &cmd, &rsp);
			/* Let the command take effect */
			set_current_state (TASK_INTERRUPTIBLE);
			schedule_timeout (3*HZ);
		}
	rc = PC4500_readrid(ai,
		            first ? RID_BSSLISTFIRST : RID_BSSLISTNEXT,
			    list, sizeof(*list));

	list->len = le16_to_cpu(list->len);
	list->index = le16_to_cpu(list->index);
	list->radioType = le16_to_cpu(list->radioType);
	list->cap = le16_to_cpu(list->cap);
	list->beaconInterval = le16_to_cpu(list->beaconInterval);
	list->fh.dwell = le16_to_cpu(list->fh.dwell);
	list->dsChannel = le16_to_cpu(list->dsChannel);
	list->atimWindow = le16_to_cpu(list->atimWindow);
	return rc;
}

static int readWepKeyRid(struct airo_info*ai, WepKeyRid *wkr, int temp) {
	int rc = PC4500_readrid(ai, temp ? RID_WEP_TEMP : RID_WEP_PERM,
				wkr, sizeof(*wkr));

	wkr->len = le16_to_cpu(wkr->len);
	wkr->kindex = le16_to_cpu(wkr->kindex);
	wkr->klen = le16_to_cpu(wkr->klen);
	return rc;
}
/* In the writeXXXRid routines we copy the rids so that we don't screwup
 * the originals when we endian them... */
static int writeWepKeyRid(struct airo_info*ai, WepKeyRid *pwkr, int perm) {
	int rc;
	WepKeyRid wkr = *pwkr;

	wkr.len = cpu_to_le16(wkr.len);
	wkr.kindex = cpu_to_le16(wkr.kindex);
	wkr.klen = cpu_to_le16(wkr.klen);
	rc = do_writerid(ai, RID_WEP_TEMP, &wkr, sizeof(wkr));
	if (rc!=SUCCESS) printk(KERN_ERR "airo:  WEP_TEMP set %x\n", rc);
	if (perm) {
		rc = do_writerid(ai, RID_WEP_PERM, &wkr, sizeof(wkr));
		if (rc!=SUCCESS) {
			printk(KERN_ERR "airo:  WEP_PERM set %x\n", rc);
		}
	}
	return rc;
}

static int readSsidRid(struct airo_info*ai, SsidRid *ssidr) {
	int i;
	int rc = PC4500_readrid(ai, RID_SSID, ssidr, sizeof(*ssidr));

	ssidr->len = le16_to_cpu(ssidr->len);
	for(i = 0; i < 3; i++) {
		ssidr->ssids[i].len = le16_to_cpu(ssidr->ssids[i].len);
	}
	return rc;
}
static int writeSsidRid(struct airo_info*ai, SsidRid *pssidr) {
	int rc;
	int i;
	SsidRid ssidr = *pssidr;

	ssidr.len = cpu_to_le16(ssidr.len);
	for(i = 0; i < 3; i++) {
		ssidr.ssids[i].len = cpu_to_le16(ssidr.ssids[i].len);
	}
	rc = do_writerid(ai, RID_SSID, &ssidr, sizeof(ssidr));
	return rc;
}
static int readConfigRid(struct airo_info*ai, ConfigRid *cfgr) {
	int rc = PC4500_readrid(ai, RID_ACTUALCONFIG, cfgr, sizeof(*cfgr));
	u16 *s;

	for(s = &cfgr->len; s <= &cfgr->rtsThres; s++) *s = le16_to_cpu(*s);

	for(s = &cfgr->shortRetryLimit; s <= &cfgr->radioType; s++)
		*s = le16_to_cpu(*s);

	for(s = &cfgr->txPower; s <= &cfgr->radioSpecific; s++)
		*s = le16_to_cpu(*s);

	for(s = &cfgr->arlThreshold; s <= &cfgr->autoWake; s++)
		*s = le16_to_cpu(*s);

	return rc;
}
static int writeConfigRid(struct airo_info*ai, ConfigRid *pcfgr) {
	u16 *s;
	ConfigRid cfgr = *pcfgr;

	for(s = &cfgr.len; s <= &cfgr.rtsThres; s++) *s = cpu_to_le16(*s);

	for(s = &cfgr.shortRetryLimit; s <= &cfgr.radioType; s++)
		*s = cpu_to_le16(*s);

	for(s = &cfgr.txPower; s <= &cfgr.radioSpecific; s++)
		*s = cpu_to_le16(*s);

	for(s = &cfgr.arlThreshold; s <= &cfgr.autoWake; s++)
		*s = cpu_to_le16(*s);

	return do_writerid( ai, RID_CONFIG, &cfgr, sizeof(cfgr));
}
static int readStatusRid(struct airo_info*ai, StatusRid *statr) {
	int rc = PC4500_readrid(ai, RID_STATUS, statr, sizeof(*statr));