/*      $OpenBSD: if_upgtvar.h,v 1.14 2008/02/02 13:48:44 mglocker Exp $ */

/*
 * Copyright (c) 2007 Marcus Glocker <mglocker@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

struct upgt_softc;

/*
 * General values.
 */
enum {
        UPGT_BULK_RX,
        UPGT_BULK_TX,
        UPGT_N_XFERS = 2,
};

#define UPGT_CONFIG_INDEX               0
#define UPGT_IFACE_INDEX                0
#define UPGT_USB_TIMEOUT                1000
#define UPGT_FIRMWARE_TIMEOUT           10

#define UPGT_MEMADDR_FIRMWARE_START     0x00020000      /* 512 bytes large */
#define UPGT_MEMSIZE_FRAME_HEAD         0x0070
#define UPGT_MEMSIZE_RX                 0x3500

#define UPGT_RX_MAXCOUNT                6
#define UPGT_TX_MAXCOUNT                128
#define UPGT_TX_STAT_INTERVAL           5
#define UPGT_RX_MINSZ                   (sizeof(struct upgt_lmac_header) + 4)

/* device flags */
#define UPGT_DEVICE_ATTACHED            (1 << 0)

/* leds */
#define UPGT_LED_OFF                    0
#define UPGT_LED_ON                     1
#define UPGT_LED_BLINK                  2

/*
 * Firmware.
 */
#define UPGT_FW_BLOCK_SIZE              256

#define UPGT_BRA_FWTYPE_SIZE            4
#define UPGT_BRA_FWTYPE_LM86            "LM86"
#define UPGT_BRA_FWTYPE_LM87            "LM87"
enum upgt_fw_type {
        UPGT_FWTYPE_LM86,
        UPGT_FWTYPE_LM87
};

#define UPGT_BRA_TYPE_FW                0x80000001
#define UPGT_BRA_TYPE_VERSION           0x80000002
#define UPGT_BRA_TYPE_DEPIF             0x80000003
#define UPGT_BRA_TYPE_EXPIF             0x80000004
#define UPGT_BRA_TYPE_DESCR             0x80000101
#define UPGT_BRA_TYPE_END               0xff0000ff
struct upgt_fw_bra_option {
        uint32_t                        type;
        uint32_t                        len;
        uint8_t                         data[];
} __packed;

struct upgt_fw_bra_descr {
        uint32_t                        unknown1;
        uint32_t                        memaddr_space_start;
        uint32_t                        memaddr_space_end;
        uint32_t                        unknown2;
        uint32_t                        unknown3;
        uint8_t                         rates[20];
} __packed;

#define UPGT_X2_SIGNATURE_SIZE          4
#define UPGT_X2_SIGNATURE               "x2  "
struct upgt_fw_x2_header {
        uint8_t                         signature[4];
        uint32_t                        startaddr;
        uint32_t                        len;
        uint32_t                        crc;
} __packed;

/*
 * EEPROM.
 */
#define UPGT_EEPROM_SIZE                8192
#define UPGT_EEPROM_BLOCK_SIZE          1020

struct upgt_eeprom_header {
        /* 14 bytes */
        uint32_t                        magic;
        uint16_t                        pad1;
        uint16_t                        preamble_len;
        uint32_t                        pad2;
        /* data */
} __packed;

#define UPGT_EEPROM_TYPE_END            0x0000
#define UPGT_EEPROM_TYPE_NAME           0x0001
#define UPGT_EEPROM_TYPE_SERIAL         0x0003
#define UPGT_EEPROM_TYPE_MAC            0x0101
#define UPGT_EEPROM_TYPE_HWRX           0x1001
#define UPGT_EEPROM_TYPE_CHIP           0x1002
#define UPGT_EEPROM_TYPE_FREQ3          0x1903
#define UPGT_EEPROM_TYPE_FREQ4          0x1904
#define UPGT_EEPROM_TYPE_FREQ5          0x1905
#define UPGT_EEPROM_TYPE_FREQ6          0x1906
#define UPGT_EEPROM_TYPE_OFF            0xffff
struct upgt_eeprom_option {
        uint16_t                        len;
        uint16_t                        type;
        uint8_t                         data[];
        /* data */
} __packed;

#define UPGT_EEPROM_RX_CONST            0x88
struct upgt_eeprom_option_hwrx {
        uint32_t                        pad1;
        uint8_t                         rxfilter;
        uint8_t                         pad2[15];
} __packed;

struct upgt_eeprom_freq3_header {
        uint8_t                         flags;
        uint8_t                         elements;
} __packed;

struct upgt_eeprom_freq4_header {
        uint8_t                         flags;
        uint8_t                         elements;
        uint8_t                         settings;
        uint8_t                         type;
} __packed;

struct upgt_eeprom_freq4_1 {
        uint16_t                        freq;
        uint8_t                         data[50];
} __packed;

struct upgt_eeprom_freq4_2 {
        uint16_t                        head;
        uint8_t                         subtails[4];
        uint8_t                         tail;
} __packed;

/*
 * LMAC protocol.
 */
struct upgt_lmac_mem {
        uint32_t                        addr;
        uint32_t                        chksum;
} __packed;

#define UPGT_H1_FLAGS_TX_MGMT           0x00    /* for TX: mgmt frame */
#define UPGT_H1_FLAGS_TX_NO_CALLBACK    0x01    /* for TX: no USB callback */
#define UPGT_H1_FLAGS_TX_DATA           0x10    /* for TX: data frame */
#define UPGT_H1_TYPE_RX_DATA            0x00    /* 802.11 RX data frame */
#define UPGT_H1_TYPE_RX_DATA_MGMT       0x04    /* 802.11 RX mgmt frame */
#define UPGT_H1_TYPE_TX_DATA            0x40    /* 802.11 TX data frame */
#define UPGT_H1_TYPE_CTRL               0x80    /* control frame */
struct upgt_lmac_h1 {
        /* 4 bytes */
        uint8_t                         flags;
        uint8_t                         type;
        uint16_t                        len;
} __packed;

#define UPGT_H2_TYPE_TX_ACK_NO          0x0000
#define UPGT_H2_TYPE_TX_ACK_YES         0x0001
#define UPGT_H2_TYPE_MACFILTER          0x0000
#define UPGT_H2_TYPE_CHANNEL            0x0001
#define UPGT_H2_TYPE_TX_DONE            0x0008
#define UPGT_H2_TYPE_STATS              0x000a
#define UPGT_H2_TYPE_EEPROM             0x000c
#define UPGT_H2_TYPE_LED                0x000d
#define UPGT_H2_FLAGS_TX_ACK_NO         0x0101
#define UPGT_H2_FLAGS_TX_ACK_YES        0x0707
struct upgt_lmac_h2 {
        /* 8 bytes */
        uint32_t                        reqid;
        uint16_t                        type;
        uint16_t                        flags;
} __packed;

struct upgt_lmac_header {
        /* 12 bytes */
        struct upgt_lmac_h1             header1;
        struct upgt_lmac_h2             header2;
} __packed;

struct upgt_lmac_eeprom {
        /* 16 bytes */
        struct upgt_lmac_h1             header1;
        struct upgt_lmac_h2             header2;
        uint16_t                        offset;
        uint16_t                        len;
        /* data */
} __packed;

#define UPGT_FILTER_TYPE_NONE           0x0000
#define UPGT_FILTER_TYPE_STA            0x0001
#define UPGT_FILTER_TYPE_IBSS           0x0002
#define UPGT_FILTER_TYPE_HOSTAP         0x0004
#define UPGT_FILTER_TYPE_MONITOR        0x0010
#define UPGT_FILTER_TYPE_RESET          0x0020
#define UPGT_FILTER_UNKNOWN1            0x0002
#define UPGT_FILTER_UNKNOWN2            0x0ca8
#define UPGT_FILTER_UNKNOWN3            0xffff
#define UPGT_FILTER_MONITOR_UNKNOWN1    0x0000
#define UPGT_FILTER_MONITOR_UNKNOWN2    0x0000
#define UPGT_FILTER_MONITOR_UNKNOWN3    0x0000
struct upgt_lmac_filter {
        struct upgt_lmac_h1             header1;
        struct upgt_lmac_h2             header2;
        /* 32 bytes */
        uint16_t                        type;
        uint8_t                         dst[IEEE80211_ADDR_LEN];
        uint8_t                         src[IEEE80211_ADDR_LEN];
        uint16_t                        unknown1;
        uint32_t                        rxaddr;
        uint16_t                        unknown2;
        uint32_t                        rxhw;
        uint16_t                        unknown3;
        uint32_t                        unknown4;
} __packed;

/* frequence 3 data */
struct upgt_lmac_freq3 {
        uint16_t                        freq;
        uint8_t                         data[6];
} __packed;

/* frequence 4 data */
struct upgt_lmac_freq4 {
        struct upgt_eeprom_freq4_2      cmd;
        uint8_t                         pad;
};

/* frequence 6 data */
struct upgt_lmac_freq6 {
        uint16_t                        freq;
        uint8_t                         data[8];
} __packed;

#define UPGT_CHANNEL_UNKNOWN1           0x0001
#define UPGT_CHANNEL_UNKNOWN2           0x0000
#define UPGT_CHANNEL_UNKNOWN3           0x48
struct upgt_lmac_channel {
        struct upgt_lmac_h1             header1;
        struct upgt_lmac_h2             header2;
        /* 112 bytes */
        uint16_t                        unknown1;
        uint16_t                        unknown2;
        uint8_t                         pad1[20];
        struct upgt_lmac_freq6          freq6;
        uint8_t                         settings;
        uint8_t                         unknown3;
        uint8_t                         freq3_1[4];
        struct upgt_lmac_freq4          freq4[8];
        uint8_t                         freq3_2[4];
        uint32_t                        pad2;
} __packed;

#define UPGT_LED_MODE_SET               0x0003
#define UPGT_LED_ACTION_OFF             0x0002
#define UPGT_LED_ACTION_ON              0x0003
#define UPGT_LED_ACTION_TMP_DUR         100     /* ms */
struct upgt_lmac_led {
        struct upgt_lmac_h1             header1;
        struct upgt_lmac_h2             header2;
        uint16_t                        mode;
        uint16_t                        action_fix;
        uint16_t                        action_tmp;
        uint16_t                        action_tmp_dur;
} __packed;

struct upgt_lmac_stats {
        struct upgt_lmac_h1             header1;
        struct upgt_lmac_h2             header2;
        uint8_t                         data[76];
} __packed;

struct upgt_lmac_rx_desc {
        struct upgt_lmac_h1             header1;
        /* 16 bytes */
        uint16_t                        freq;
        uint8_t                         unknown1;
        uint8_t                         rate;
        uint8_t                         rssi;
        uint8_t                         pad;
        uint16_t                        unknown2;
        uint32_t                        timestamp;
        uint32_t                        unknown3;
        uint8_t                         data[];
} __packed;

#define UPGT_TX_DESC_KEY_EXISTS         0x01
struct upgt_lmac_tx_desc_wep {
        uint8_t                         key_exists;
        uint8_t                         key_len;
        uint8_t                         key_val[16];
} __packed;

#define UPGT_TX_DESC_TYPE_BEACON        0x00000000
#define UPGT_TX_DESC_TYPE_PROBE         0x00000001
#define UPGT_TX_DESC_TYPE_MGMT          0x00000002
#define UPGT_TX_DESC_TYPE_DATA          0x00000004
#define UPGT_TX_DESC_PAD3_SIZE          2
struct upgt_lmac_tx_desc {
        struct upgt_lmac_h1             header1;
        struct upgt_lmac_h2             header2;
        uint8_t                         rates[8];
        uint16_t                        pad1;
        struct upgt_lmac_tx_desc_wep    wep_key;
        uint32_t                        type;
        uint32_t                        pad2;
        uint32_t                        unknown1;
        uint32_t                        unknown2;
        uint8_t                         pad3[2];
        /* 802.11 frame data */
} __packed;

#define UPGT_TX_DONE_DESC_STATUS_OK     0x0001
struct upgt_lmac_tx_done_desc {
        struct upgt_lmac_h1             header1;
        struct upgt_lmac_h2             header2;
        uint16_t                        status;
        uint16_t                        rssi;
        uint16_t                        seq;
        uint16_t                        unknown;
} __packed;

/*
 * USB xfers.
 */
struct upgt_data {
        uint8_t                         *buf;
        uint32_t                         buflen;
        struct ieee80211_node           *ni;
        struct mbuf                     *m;
        uint32_t                         addr;
        STAILQ_ENTRY(upgt_data)          next;
};
typedef STAILQ_HEAD(, upgt_data) upgt_datahead;

/*
 * Prism memory.
 */
struct upgt_memory_page {
        uint8_t                         used;
        uint32_t                        addr;
} __packed;

#define UPGT_MEMORY_MAX_PAGES           8
struct upgt_memory {
        uint8_t                         pages;
        struct upgt_memory_page         page[UPGT_MEMORY_MAX_PAGES];
} __packed;

/*
 * BPF
 */
struct upgt_rx_radiotap_header {
        struct ieee80211_radiotap_header wr_ihdr;
        uint8_t         wr_flags;
        uint8_t         wr_rate;
        uint16_t        wr_chan_freq;
        uint16_t        wr_chan_flags;
        int8_t          wr_antsignal;
} __packed __aligned(8);

#define UPGT_RX_RADIOTAP_PRESENT                                        \
        ((1 << IEEE80211_RADIOTAP_FLAGS) |                              \
         (1 << IEEE80211_RADIOTAP_RATE) |                               \
         (1 << IEEE80211_RADIOTAP_CHANNEL) |                            \
         (1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL))

struct upgt_tx_radiotap_header {
        struct ieee80211_radiotap_header wt_ihdr;
        uint8_t         wt_flags;
        uint8_t         wt_rate;
        uint16_t        wt_chan_freq;
        uint16_t        wt_chan_flags;
} __packed;

#define UPGT_TX_RADIOTAP_PRESENT                                        \
        ((1 << IEEE80211_RADIOTAP_FLAGS) |                              \
         (1 << IEEE80211_RADIOTAP_RATE) |                               \
         (1 << IEEE80211_RADIOTAP_CHANNEL))

struct upgt_stat {
        uint32_t                st_tx_active;
        uint32_t                st_tx_inactive;
        uint32_t                st_tx_pending;
};

#define UPGT_STAT_INC(sc, var)  (sc)->sc_stat.var++
#define UPGT_STAT_DEC(sc, var)  (sc)->sc_stat.var--

struct upgt_vap {
        struct ieee80211vap     vap;
        int                     (*newstate)(struct ieee80211vap *,
                                    enum ieee80211_state, int);
};
#define UPGT_VAP(vap)   ((struct upgt_vap *)(vap))

struct upgt_softc {
        struct ieee80211com      sc_ic;
        struct mbufq             sc_snd;
        device_t                 sc_dev;
        struct usb_device       *sc_udev;
        void                    *sc_rx_dma_buf;
        void                    *sc_tx_dma_buf;
        struct mtx               sc_mtx;
        struct upgt_stat         sc_stat;
        int                      sc_flags;
#define UPGT_FLAG_FWLOADED       (1 << 0)
#define UPGT_FLAG_INITDONE       (1 << 1)
#define UPGT_FLAG_DETACHED       (1 << 2)
        int                      sc_debug;

        enum ieee80211_state     sc_state;
        int                      sc_arg;
        int                      sc_led_blink;
        struct callout           sc_led_ch;
        uint8_t                  sc_cur_rateset[8];

        /* watchdog  */
        int                      sc_tx_timer;
        struct callout           sc_watchdog_ch;

        /* Firmware.  */
        int                      sc_fw_type;
        /* memory addresses on device */
        uint32_t                 sc_memaddr_frame_start;
        uint32_t                 sc_memaddr_frame_end;
        uint32_t                 sc_memaddr_rx_start;
        struct upgt_memory       sc_memory;

        /* data which we found in the EEPROM */
        uint8_t                  sc_eeprom[2 * UPGT_EEPROM_SIZE] __aligned(4);
        uint16_t                 sc_eeprom_hwrx;
        struct upgt_lmac_freq3   sc_eeprom_freq3[IEEE80211_CHAN_MAX];
        struct upgt_lmac_freq4   sc_eeprom_freq4[IEEE80211_CHAN_MAX][8];
        struct upgt_lmac_freq6   sc_eeprom_freq6[IEEE80211_CHAN_MAX];
        uint8_t                  sc_eeprom_freq6_settings;

        /* RX/TX  */
        struct usb_xfer *sc_xfer[UPGT_N_XFERS];
        int                      sc_rx_no;
        int                      sc_tx_no;
        struct upgt_data         sc_rx_data[UPGT_RX_MAXCOUNT];
        upgt_datahead            sc_rx_active;
        upgt_datahead            sc_rx_inactive;
        struct upgt_data         sc_tx_data[UPGT_TX_MAXCOUNT];
        upgt_datahead            sc_tx_active;
        upgt_datahead            sc_tx_inactive;
        upgt_datahead            sc_tx_pending;

        /* BPF  */
        struct upgt_rx_radiotap_header  sc_rxtap;
        struct upgt_tx_radiotap_header  sc_txtap;
};

#define UPGT_LOCK(sc)           mtx_lock(&(sc)->sc_mtx)
#define UPGT_UNLOCK(sc)         mtx_unlock(&(sc)->sc_mtx)
#define UPGT_ASSERT_LOCKED(sc)  mtx_assert(&(sc)->sc_mtx, MA_OWNED)