Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / drivers / net / wireless / wl3501.h
diff --git a/kernel/drivers/net/wireless/wl3501.h b/kernel/drivers/net/wireless/wl3501.h
new file mode 100644 (file)
index 0000000..3fbfd19
--- /dev/null
@@ -0,0 +1,615 @@
+#ifndef __WL3501_H__
+#define __WL3501_H__
+
+#include <linux/spinlock.h>
+#include <linux/ieee80211.h>
+
+/* define for WLA 2.0 */
+#define WL3501_BLKSZ 256
+/*
+ * ID for input Signals of DRIVER block
+ * bit[7-5] is block ID: 000
+ * bit[4-0] is signal ID
+*/
+enum wl3501_signals {
+       WL3501_SIG_ALARM,
+       WL3501_SIG_MD_CONFIRM,
+       WL3501_SIG_MD_IND,
+       WL3501_SIG_ASSOC_CONFIRM,
+       WL3501_SIG_ASSOC_IND,
+       WL3501_SIG_AUTH_CONFIRM,
+       WL3501_SIG_AUTH_IND,
+       WL3501_SIG_DEAUTH_CONFIRM,
+       WL3501_SIG_DEAUTH_IND,
+       WL3501_SIG_DISASSOC_CONFIRM,
+       WL3501_SIG_DISASSOC_IND,
+       WL3501_SIG_GET_CONFIRM,
+       WL3501_SIG_JOIN_CONFIRM,
+       WL3501_SIG_PWR_MGMT_CONFIRM,
+       WL3501_SIG_REASSOC_CONFIRM,
+       WL3501_SIG_REASSOC_IND,
+       WL3501_SIG_SCAN_CONFIRM,
+       WL3501_SIG_SET_CONFIRM,
+       WL3501_SIG_START_CONFIRM,
+       WL3501_SIG_RESYNC_CONFIRM,
+       WL3501_SIG_SITE_CONFIRM,
+       WL3501_SIG_SAVE_CONFIRM,
+       WL3501_SIG_RFTEST_CONFIRM,
+/*
+ * ID for input Signals of MLME block
+ * bit[7-5] is block ID: 010
+ * bit[4-0] is signal ID
+ */
+       WL3501_SIG_ASSOC_REQ = 0x20,
+       WL3501_SIG_AUTH_REQ,
+       WL3501_SIG_DEAUTH_REQ,
+       WL3501_SIG_DISASSOC_REQ,
+       WL3501_SIG_GET_REQ,
+       WL3501_SIG_JOIN_REQ,
+       WL3501_SIG_PWR_MGMT_REQ,
+       WL3501_SIG_REASSOC_REQ,
+       WL3501_SIG_SCAN_REQ,
+       WL3501_SIG_SET_REQ,
+       WL3501_SIG_START_REQ,
+       WL3501_SIG_MD_REQ,
+       WL3501_SIG_RESYNC_REQ,
+       WL3501_SIG_SITE_REQ,
+       WL3501_SIG_SAVE_REQ,
+       WL3501_SIG_RF_TEST_REQ,
+       WL3501_SIG_MM_CONFIRM = 0x60,
+       WL3501_SIG_MM_IND,
+};
+
+enum wl3501_mib_attribs {
+       WL3501_MIB_ATTR_STATION_ID,
+       WL3501_MIB_ATTR_AUTH_ALGORITHMS,
+       WL3501_MIB_ATTR_AUTH_TYPE,
+       WL3501_MIB_ATTR_MEDIUM_OCCUPANCY_LIMIT,
+       WL3501_MIB_ATTR_CF_POLLABLE,
+       WL3501_MIB_ATTR_CFP_PERIOD,
+       WL3501_MIB_ATTR_CFPMAX_DURATION,
+       WL3501_MIB_ATTR_AUTH_RESP_TMOUT,
+       WL3501_MIB_ATTR_RX_DTIMS,
+       WL3501_MIB_ATTR_PRIV_OPT_IMPLEMENTED,
+       WL3501_MIB_ATTR_PRIV_INVOKED,
+       WL3501_MIB_ATTR_WEP_DEFAULT_KEYS,
+       WL3501_MIB_ATTR_WEP_DEFAULT_KEY_ID,
+       WL3501_MIB_ATTR_WEP_KEY_MAPPINGS,
+       WL3501_MIB_ATTR_WEP_KEY_MAPPINGS_LEN,
+       WL3501_MIB_ATTR_EXCLUDE_UNENCRYPTED,
+       WL3501_MIB_ATTR_WEP_ICV_ERROR_COUNT,
+       WL3501_MIB_ATTR_WEP_UNDECRYPTABLE_COUNT,
+       WL3501_MIB_ATTR_WEP_EXCLUDED_COUNT,
+       WL3501_MIB_ATTR_MAC_ADDR,
+       WL3501_MIB_ATTR_GROUP_ADDRS,
+       WL3501_MIB_ATTR_RTS_THRESHOLD,
+       WL3501_MIB_ATTR_SHORT_RETRY_LIMIT,
+       WL3501_MIB_ATTR_LONG_RETRY_LIMIT,
+       WL3501_MIB_ATTR_FRAG_THRESHOLD,
+       WL3501_MIB_ATTR_MAX_TX_MSDU_LIFETIME,
+       WL3501_MIB_ATTR_MAX_RX_LIFETIME,
+       WL3501_MIB_ATTR_MANUFACTURER_ID,
+       WL3501_MIB_ATTR_PRODUCT_ID,
+       WL3501_MIB_ATTR_TX_FRAG_COUNT,
+       WL3501_MIB_ATTR_MULTICAST_TX_FRAME_COUNT,
+       WL3501_MIB_ATTR_FAILED_COUNT,
+       WL3501_MIB_ATTR_RX_FRAG_COUNT,
+       WL3501_MIB_ATTR_MULTICAST_RX_COUNT,
+       WL3501_MIB_ATTR_FCS_ERROR_COUNT,
+       WL3501_MIB_ATTR_RETRY_COUNT,
+       WL3501_MIB_ATTR_MULTIPLE_RETRY_COUNT,
+       WL3501_MIB_ATTR_RTS_SUCCESS_COUNT,
+       WL3501_MIB_ATTR_RTS_FAILURE_COUNT,
+       WL3501_MIB_ATTR_ACK_FAILURE_COUNT,
+       WL3501_MIB_ATTR_FRAME_DUPLICATE_COUNT,
+       WL3501_MIB_ATTR_PHY_TYPE,
+       WL3501_MIB_ATTR_REG_DOMAINS_SUPPORT,
+       WL3501_MIB_ATTR_CURRENT_REG_DOMAIN,
+       WL3501_MIB_ATTR_SLOT_TIME,
+       WL3501_MIB_ATTR_CCA_TIME,
+       WL3501_MIB_ATTR_RX_TX_TURNAROUND_TIME,
+       WL3501_MIB_ATTR_TX_PLCP_DELAY,
+       WL3501_MIB_ATTR_RX_TX_SWITCH_TIME,
+       WL3501_MIB_ATTR_TX_RAMP_ON_TIME,
+       WL3501_MIB_ATTR_TX_RF_DELAY,
+       WL3501_MIB_ATTR_SIFS_TIME,
+       WL3501_MIB_ATTR_RX_RF_DELAY,
+       WL3501_MIB_ATTR_RX_PLCP_DELAY,
+       WL3501_MIB_ATTR_MAC_PROCESSING_DELAY,
+       WL3501_MIB_ATTR_TX_RAMP_OFF_TIME,
+       WL3501_MIB_ATTR_PREAMBLE_LEN,
+       WL3501_MIB_ATTR_PLCP_HEADER_LEN,
+       WL3501_MIB_ATTR_MPDU_DURATION_FACTOR,
+       WL3501_MIB_ATTR_AIR_PROPAGATION_TIME,
+       WL3501_MIB_ATTR_TEMP_TYPE,
+       WL3501_MIB_ATTR_CW_MIN,
+       WL3501_MIB_ATTR_CW_MAX,
+       WL3501_MIB_ATTR_SUPPORT_DATA_RATES_TX,
+       WL3501_MIB_ATTR_SUPPORT_DATA_RATES_RX,
+       WL3501_MIB_ATTR_MPDU_MAX_LEN,
+       WL3501_MIB_ATTR_SUPPORT_TX_ANTENNAS,
+       WL3501_MIB_ATTR_CURRENT_TX_ANTENNA,
+       WL3501_MIB_ATTR_SUPPORT_RX_ANTENNAS,
+       WL3501_MIB_ATTR_DIVERSITY_SUPPORT,
+       WL3501_MIB_ATTR_DIVERSITY_SELECTION_RS,
+       WL3501_MIB_ATTR_NR_SUPPORTED_PWR_LEVELS,
+       WL3501_MIB_ATTR_TX_PWR_LEVEL1,
+       WL3501_MIB_ATTR_TX_PWR_LEVEL2,
+       WL3501_MIB_ATTR_TX_PWR_LEVEL3,
+       WL3501_MIB_ATTR_TX_PWR_LEVEL4,
+       WL3501_MIB_ATTR_TX_PWR_LEVEL5,
+       WL3501_MIB_ATTR_TX_PWR_LEVEL6,
+       WL3501_MIB_ATTR_TX_PWR_LEVEL7,
+       WL3501_MIB_ATTR_TX_PWR_LEVEL8,
+       WL3501_MIB_ATTR_CURRENT_TX_PWR_LEVEL,
+       WL3501_MIB_ATTR_CURRENT_CHAN,
+       WL3501_MIB_ATTR_CCA_MODE_SUPPORTED,
+       WL3501_MIB_ATTR_CURRENT_CCA_MODE,
+       WL3501_MIB_ATTR_ED_THRESHOLD,
+       WL3501_MIB_ATTR_SINTHESIZER_LOCKED,
+       WL3501_MIB_ATTR_CURRENT_PWR_STATE,
+       WL3501_MIB_ATTR_DOZE_TURNON_TIME,
+       WL3501_MIB_ATTR_RCR33,
+       WL3501_MIB_ATTR_DEFAULT_CHAN,
+       WL3501_MIB_ATTR_SSID,
+       WL3501_MIB_ATTR_PWR_MGMT_ENABLE,
+       WL3501_MIB_ATTR_NET_CAPABILITY,
+       WL3501_MIB_ATTR_ROUTING,
+};
+
+enum wl3501_net_type {
+       WL3501_NET_TYPE_INFRA,
+       WL3501_NET_TYPE_ADHOC,
+       WL3501_NET_TYPE_ANY_BSS,
+};
+
+enum wl3501_scan_type {
+       WL3501_SCAN_TYPE_ACTIVE,
+       WL3501_SCAN_TYPE_PASSIVE,
+};
+
+enum wl3501_tx_result {
+       WL3501_TX_RESULT_SUCCESS,
+       WL3501_TX_RESULT_NO_BSS,
+       WL3501_TX_RESULT_RETRY_LIMIT,
+};
+
+enum wl3501_sys_type {
+       WL3501_SYS_TYPE_OPEN,
+       WL3501_SYS_TYPE_SHARE_KEY,
+};
+
+enum wl3501_status {
+       WL3501_STATUS_SUCCESS,
+       WL3501_STATUS_INVALID,
+       WL3501_STATUS_TIMEOUT,
+       WL3501_STATUS_REFUSED,
+       WL3501_STATUS_MANY_REQ,
+       WL3501_STATUS_ALREADY_BSS,
+};
+
+#define WL3501_MGMT_CAPABILITY_ESS             0x0001  /* see 802.11 p.58 */
+#define WL3501_MGMT_CAPABILITY_IBSS            0x0002  /*      - " -      */
+#define WL3501_MGMT_CAPABILITY_CF_POLLABLE     0x0004  /*      - " -      */
+#define WL3501_MGMT_CAPABILITY_CF_POLL_REQUEST 0x0008  /*      - " -      */
+#define WL3501_MGMT_CAPABILITY_PRIVACY         0x0010  /*      - " -      */
+
+#define IW_REG_DOMAIN_FCC      0x10    /* Channel 1 to 11      USA    */
+#define IW_REG_DOMAIN_DOC      0x20    /* Channel 1 to 11      Canada */
+#define IW_REG_DOMAIN_ETSI     0x30    /* Channel 1 to 13      Europe */
+#define IW_REG_DOMAIN_SPAIN    0x31    /* Channel 10 to 11     Spain  */
+#define IW_REG_DOMAIN_FRANCE   0x32    /* Channel 10 to 13     France */
+#define IW_REG_DOMAIN_MKK      0x40    /* Channel 14           Japan  */
+#define IW_REG_DOMAIN_MKK1     0x41    /* Channel 1-14         Japan  */
+#define IW_REG_DOMAIN_ISRAEL   0x50    /* Channel 3 - 9        Israel */
+
+#define IW_MGMT_RATE_LABEL_MANDATORY 128 /* MSB */
+
+enum iw_mgmt_rate_labels {
+       IW_MGMT_RATE_LABEL_1MBIT   = 2,
+       IW_MGMT_RATE_LABEL_2MBIT   = 4,
+       IW_MGMT_RATE_LABEL_5_5MBIT = 11,
+       IW_MGMT_RATE_LABEL_11MBIT  = 22,
+};
+
+enum iw_mgmt_info_element_ids {
+       IW_MGMT_INFO_ELEMENT_SSID,                /* Service Set Identity */
+       IW_MGMT_INFO_ELEMENT_SUPPORTED_RATES,
+       IW_MGMT_INFO_ELEMENT_FH_PARAMETER_SET,
+       IW_MGMT_INFO_ELEMENT_DS_PARAMETER_SET,
+       IW_MGMT_INFO_ELEMENT_CS_PARAMETER_SET,
+       IW_MGMT_INFO_ELEMENT_CS_TIM,              /* Traffic Information Map */
+       IW_MGMT_INFO_ELEMENT_IBSS_PARAMETER_SET,
+       /* 7-15: Reserved, unused */
+       IW_MGMT_INFO_ELEMENT_CHALLENGE_TEXT = 16,
+       /* 17-31 Reserved for challenge text extension */
+       /* 32-255 Reserved, unused */
+};
+
+struct iw_mgmt_info_element {
+       u8 id; /* one of enum iw_mgmt_info_element_ids,
+                 but sizeof(enum) > sizeof(u8) :-( */
+       u8 len;
+       u8 data[0];
+} __packed;
+
+struct iw_mgmt_essid_pset {
+       struct iw_mgmt_info_element el;
+       u8                          essid[IW_ESSID_MAX_SIZE];
+} __packed;
+
+/*
+ * According to 802.11 Wireless Netowors, the definitive guide - O'Reilly
+ * Pg 75
+ */ 
+#define IW_DATA_RATE_MAX_LABELS 8
+
+struct iw_mgmt_data_rset {
+       struct iw_mgmt_info_element el;
+       u8                          data_rate_labels[IW_DATA_RATE_MAX_LABELS];
+} __packed;
+
+struct iw_mgmt_ds_pset {
+       struct iw_mgmt_info_element el;
+       u8                          chan;
+} __packed;
+
+struct iw_mgmt_cf_pset {
+       struct iw_mgmt_info_element el;
+       u8                          cfp_count;
+       u8                          cfp_period;
+       u16                         cfp_max_duration;
+       u16                         cfp_dur_remaining;
+} __packed;
+
+struct iw_mgmt_ibss_pset {
+       struct iw_mgmt_info_element el;
+       u16                         atim_window;
+} __packed;
+
+struct wl3501_tx_hdr {
+       u16     tx_cnt;
+       u8      sync[16];
+       u16     sfd;
+       u8      signal;
+       u8      service;
+       u16     len;
+       u16     crc16;
+       u16     frame_ctrl;
+       u16     duration_id;
+       u8      addr1[ETH_ALEN];
+       u8      addr2[ETH_ALEN];
+       u8      addr3[ETH_ALEN];
+       u16     seq_ctrl;
+       u8      addr4[ETH_ALEN];
+};
+
+struct wl3501_rx_hdr {
+       u16     rx_next_blk;
+       u16     rc_next_frame_blk;
+       u8      rx_blk_ctrl;
+       u8      rx_next_frame;
+       u8      rx_next_frame1;
+       u8      rssi;
+       char    time[8];
+       u8      signal;
+       u8      service;
+       u16     len;
+       u16     crc16;
+       u16     frame_ctrl;
+       u16     duration;
+       u8      addr1[ETH_ALEN];
+       u8      addr2[ETH_ALEN];
+       u8      addr3[ETH_ALEN];
+       u16     seq;
+       u8      addr4[ETH_ALEN];
+};
+
+struct wl3501_start_req {
+       u16                         next_blk;
+       u8                          sig_id;
+       u8                          bss_type;
+       u16                         beacon_period;
+       u16                         dtim_period;
+       u16                         probe_delay;
+       u16                         cap_info;
+       struct iw_mgmt_essid_pset   ssid;
+       struct iw_mgmt_data_rset    bss_basic_rset;
+       struct iw_mgmt_data_rset    operational_rset;
+       struct iw_mgmt_cf_pset      cf_pset;
+       struct iw_mgmt_ds_pset      ds_pset;
+       struct iw_mgmt_ibss_pset    ibss_pset;
+};
+
+struct wl3501_assoc_req {
+       u16     next_blk;
+       u8      sig_id;
+       u8      reserved;
+       u16     timeout;
+       u16     cap_info;
+       u16     listen_interval;
+       u8      mac_addr[ETH_ALEN];
+};
+
+struct wl3501_assoc_confirm {
+       u16     next_blk;
+       u8      sig_id;
+       u8      reserved;
+       u16     status;
+};
+
+struct wl3501_assoc_ind {
+       u16     next_blk;
+       u8      sig_id;
+       u8      mac_addr[ETH_ALEN];
+};
+
+struct wl3501_auth_req {
+       u16     next_blk;
+       u8      sig_id;
+       u8      reserved;
+       u16     type;
+       u16     timeout;
+       u8      mac_addr[ETH_ALEN];
+};
+
+struct wl3501_auth_confirm {
+       u16     next_blk;
+       u8      sig_id;
+       u8      reserved;
+       u16     type;
+       u16     status;
+       u8      mac_addr[ETH_ALEN];
+};
+
+struct wl3501_get_req {
+       u16     next_blk;
+       u8      sig_id;
+       u8      reserved;
+       u16     mib_attrib;
+};
+
+struct wl3501_get_confirm {
+       u16     next_blk;
+       u8      sig_id;
+       u8      reserved;
+       u16     mib_status;
+       u16     mib_attrib;
+       u8      mib_value[100];
+};
+
+struct wl3501_join_req {
+       u16                         next_blk;
+       u8                          sig_id;
+       u8                          reserved;
+       struct iw_mgmt_data_rset    operational_rset;
+       u16                         reserved2;
+       u16                         timeout;
+       u16                         probe_delay;
+       u8                          timestamp[8];
+       u8                          local_time[8];
+       u16                         beacon_period;
+       u16                         dtim_period;
+       u16                         cap_info;
+       u8                          bss_type;
+       u8                          bssid[ETH_ALEN];
+       struct iw_mgmt_essid_pset   ssid;
+       struct iw_mgmt_ds_pset      ds_pset;
+       struct iw_mgmt_cf_pset      cf_pset;
+       struct iw_mgmt_ibss_pset    ibss_pset;
+       struct iw_mgmt_data_rset    bss_basic_rset;
+};
+
+struct wl3501_join_confirm {
+       u16     next_blk;
+       u8      sig_id;
+       u8      reserved;
+       u16     status;
+};
+
+struct wl3501_pwr_mgmt_req {
+       u16     next_blk;
+       u8      sig_id;
+       u8      pwr_save;
+       u8      wake_up;
+       u8      receive_dtims;
+};
+
+struct wl3501_pwr_mgmt_confirm {
+       u16     next_blk;
+       u8      sig_id;
+       u8      reserved;
+       u16     status;
+};
+
+struct wl3501_scan_req {
+       u16                         next_blk;
+       u8                          sig_id;
+       u8                          bss_type;
+       u16                         probe_delay;
+       u16                         min_chan_time;
+       u16                         max_chan_time;
+       u8                          chan_list[14];
+       u8                          bssid[ETH_ALEN];
+       struct iw_mgmt_essid_pset   ssid;
+       enum wl3501_scan_type       scan_type;
+};
+
+struct wl3501_scan_confirm {
+       u16                         next_blk;
+       u8                          sig_id;
+       u8                          reserved;
+       u16                         status;
+       char                        timestamp[8];
+       char                        localtime[8];
+       u16                         beacon_period;
+       u16                         dtim_period;
+       u16                         cap_info;
+       u8                          bss_type;
+       u8                          bssid[ETH_ALEN];
+       struct iw_mgmt_essid_pset   ssid;
+       struct iw_mgmt_ds_pset      ds_pset;
+       struct iw_mgmt_cf_pset      cf_pset;
+       struct iw_mgmt_ibss_pset    ibss_pset;
+       struct iw_mgmt_data_rset    bss_basic_rset;
+       u8                          rssi;
+};
+
+struct wl3501_start_confirm {
+       u16     next_blk;
+       u8      sig_id;
+       u8      reserved;
+       u16     status;
+};
+
+struct wl3501_md_req {
+       u16     next_blk;
+       u8      sig_id;
+       u8      routing;
+       u16     data;
+       u16     size;
+       u8      pri;
+       u8      service_class;
+       u8      daddr[ETH_ALEN];
+       u8      saddr[ETH_ALEN];
+};
+
+struct wl3501_md_ind {
+       u16     next_blk;
+       u8      sig_id;
+       u8      routing;
+       u16     data;
+       u16     size;
+       u8      reception;
+       u8      pri;
+       u8      service_class;
+       u8      daddr[ETH_ALEN];
+       u8      saddr[ETH_ALEN];
+};
+
+struct wl3501_md_confirm {
+       u16     next_blk;
+       u8      sig_id;
+       u8      reserved;
+       u16     data;
+       u8      status;
+       u8      pri;
+       u8      service_class;
+};
+
+struct wl3501_resync_req {
+       u16     next_blk;
+       u8      sig_id;
+};
+
+/* Definitions for supporting clone adapters. */
+/* System Interface Registers (SIR space) */
+#define WL3501_NIC_GCR ((u8)0x00)      /* SIR0 - General Conf Register */
+#define WL3501_NIC_BSS ((u8)0x01)      /* SIR1 - Bank Switching Select Reg */
+#define WL3501_NIC_LMAL ((u8)0x02)     /* SIR2 - Local Mem addr Reg [7:0] */
+#define WL3501_NIC_LMAH ((u8)0x03)     /* SIR3 - Local Mem addr Reg [14:8] */
+#define WL3501_NIC_IODPA ((u8)0x04)    /* SIR4 - I/O Data Port A */
+#define WL3501_NIC_IODPB ((u8)0x05)    /* SIR5 - I/O Data Port B */
+#define WL3501_NIC_IODPC ((u8)0x06)    /* SIR6 - I/O Data Port C */
+#define WL3501_NIC_IODPD ((u8)0x07)    /* SIR7 - I/O Data Port D */
+
+/* Bits in GCR */
+#define WL3501_GCR_SWRESET ((u8)0x80)
+#define WL3501_GCR_CORESET ((u8)0x40)
+#define WL3501_GCR_DISPWDN ((u8)0x20)
+#define WL3501_GCR_ECWAIT  ((u8)0x10)
+#define WL3501_GCR_ECINT   ((u8)0x08)
+#define WL3501_GCR_INT2EC  ((u8)0x04)
+#define WL3501_GCR_ENECINT ((u8)0x02)
+#define WL3501_GCR_DAM     ((u8)0x01)
+
+/* Bits in BSS (Bank Switching Select Register) */
+#define WL3501_BSS_FPAGE0 ((u8)0x20)   /* Flash memory page0 */
+#define WL3501_BSS_FPAGE1 ((u8)0x28)
+#define WL3501_BSS_FPAGE2 ((u8)0x30)
+#define WL3501_BSS_FPAGE3 ((u8)0x38)
+#define WL3501_BSS_SPAGE0 ((u8)0x00)   /* SRAM page0 */
+#define WL3501_BSS_SPAGE1 ((u8)0x08)
+#define WL3501_BSS_SPAGE2 ((u8)0x10)
+#define WL3501_BSS_SPAGE3 ((u8)0x18)
+
+/* Define Driver Interface */
+/* Refer IEEE 802.11 */
+/* Tx packet header, include PLCP and MPDU */
+/* Tx PLCP Header */
+struct wl3501_80211_tx_plcp_hdr {
+       u8      sync[16];
+       u16     sfd;
+       u8      signal;
+       u8      service;
+       u16     len;
+       u16     crc16;
+} __packed;
+
+struct wl3501_80211_tx_hdr {
+       struct wl3501_80211_tx_plcp_hdr pclp_hdr;
+       struct ieee80211_hdr            mac_hdr;
+} __packed;
+
+/*
+   Reserve the beginning Tx space for descriptor use.
+
+   TxBlockOffset -->   *----*----*----*----* \
+       (TxFreeDesc)    |  0 |  1 |  2 |  3 |  \
+                       |  4 |  5 |  6 |  7 |   |
+                       |  8 |  9 | 10 | 11 |   TX_DESC * 20
+                       | 12 | 13 | 14 | 15 |   |
+                       | 16 | 17 | 18 | 19 |  /
+   TxBufferBegin -->   *----*----*----*----* /
+   (TxBufferHead)      |                   |
+   (TxBufferTail)      |                   |
+                       |    Send Buffer    |
+                       |                   |
+                       |                   |
+                       *-------------------*
+   TxBufferEnd    -------------------------/
+
+*/
+
+struct wl3501_card {
+       int                             base_addr;
+       u8                              mac_addr[ETH_ALEN];
+       spinlock_t                      lock;
+       wait_queue_head_t               wait;
+       struct wl3501_get_confirm       sig_get_confirm;
+       struct wl3501_pwr_mgmt_confirm  sig_pwr_mgmt_confirm;
+       u16                             tx_buffer_size;
+       u16                             tx_buffer_head;
+       u16                             tx_buffer_tail;
+       u16                             tx_buffer_cnt;
+       u16                             esbq_req_start;
+       u16                             esbq_req_end;
+       u16                             esbq_req_head;
+       u16                             esbq_req_tail;
+       u16                             esbq_confirm_start;
+       u16                             esbq_confirm_end;
+       u16                             esbq_confirm;
+       struct iw_mgmt_essid_pset       essid;
+       struct iw_mgmt_essid_pset       keep_essid;
+       u8                              bssid[ETH_ALEN];
+       int                             net_type;
+       char                            nick[32];
+       char                            card_name[32];
+       char                            firmware_date[32];
+       u8                              chan;
+       u8                              cap_info;
+       u16                             start_seg;
+       u16                             bss_cnt;
+       u16                             join_sta_bss;
+       u8                              rssi;
+       u8                              adhoc_times;
+       u8                              reg_domain;
+       u8                              version[2];
+       struct wl3501_scan_confirm      bss_set[20];
+
+       struct iw_statistics            wstats;
+       struct iw_spy_data              spy_data;
+       struct iw_public_data           wireless_data;
+       struct pcmcia_device            *p_dev;
+};
+#endif