/*
 * Shared Atheros AR9170 Header
 *
 * RX/TX meta descriptor format
 *
 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
 * Copyright 2009-2011 Christian Lamparter <chunkeey@googlemail.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, see
 * http://www.gnu.org/licenses/.
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *    Copyright (c) 2007-2008 Atheros Communications, Inc.
 *
 *    Permission to use, copy, modify, and/or 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.
 */

#ifndef __CARL9170_SHARED_WLAN_H
#define __CARL9170_SHARED_WLAN_H

#include "fwcmd.h"

#define AR9170_RX_PHY_RATE_CCK_1M               0x0a
#define AR9170_RX_PHY_RATE_CCK_2M               0x14
#define AR9170_RX_PHY_RATE_CCK_5M               0x37
#define AR9170_RX_PHY_RATE_CCK_11M              0x6e

#define AR9170_ENC_ALG_NONE                     0x0
#define AR9170_ENC_ALG_WEP64                    0x1
#define AR9170_ENC_ALG_TKIP                     0x2
#define AR9170_ENC_ALG_AESCCMP                  0x4
#define AR9170_ENC_ALG_WEP128                   0x5
#define AR9170_ENC_ALG_WEP256                   0x6
#define AR9170_ENC_ALG_CENC                     0x7

#define AR9170_RX_ENC_SOFTWARE                  0x8

#define AR9170_RX_STATUS_MODULATION             0x03
#define AR9170_RX_STATUS_MODULATION_S           0
#define AR9170_RX_STATUS_MODULATION_CCK         0x00
#define AR9170_RX_STATUS_MODULATION_OFDM        0x01
#define AR9170_RX_STATUS_MODULATION_HT          0x02
#define AR9170_RX_STATUS_MODULATION_DUPOFDM     0x03

/* depends on modulation */
#define AR9170_RX_STATUS_SHORT_PREAMBLE         0x08
#define AR9170_RX_STATUS_GREENFIELD             0x08

#define AR9170_RX_STATUS_MPDU                   0x30
#define AR9170_RX_STATUS_MPDU_S                 4
#define AR9170_RX_STATUS_MPDU_SINGLE            0x00
#define AR9170_RX_STATUS_MPDU_FIRST             0x20
#define AR9170_RX_STATUS_MPDU_MIDDLE            0x30
#define AR9170_RX_STATUS_MPDU_LAST              0x10

#define AR9170_RX_STATUS_CONT_AGGR              0x40
#define AR9170_RX_STATUS_TOTAL_ERROR            0x80

#define AR9170_RX_ERROR_RXTO                    0x01
#define AR9170_RX_ERROR_OVERRUN                 0x02
#define AR9170_RX_ERROR_DECRYPT                 0x04
#define AR9170_RX_ERROR_FCS                     0x08
#define AR9170_RX_ERROR_WRONG_RA                0x10
#define AR9170_RX_ERROR_PLCP                    0x20
#define AR9170_RX_ERROR_MMIC                    0x40

/* these are either-or */
#define AR9170_TX_MAC_PROT_RTS                  0x0001
#define AR9170_TX_MAC_PROT_CTS                  0x0002
#define AR9170_TX_MAC_PROT                      0x0003

#define AR9170_TX_MAC_NO_ACK                    0x0004
/* if unset, MAC will only do SIFS space before frame */
#define AR9170_TX_MAC_BACKOFF                   0x0008
#define AR9170_TX_MAC_BURST                     0x0010
#define AR9170_TX_MAC_AGGR                      0x0020

/* encryption is a two-bit field */
#define AR9170_TX_MAC_ENCR_NONE                 0x0000
#define AR9170_TX_MAC_ENCR_RC4                  0x0040
#define AR9170_TX_MAC_ENCR_CENC                 0x0080
#define AR9170_TX_MAC_ENCR_AES                  0x00c0

#define AR9170_TX_MAC_MMIC                      0x0100
#define AR9170_TX_MAC_HW_DURATION               0x0200
#define AR9170_TX_MAC_QOS_S                     10
#define AR9170_TX_MAC_QOS                       0x0c00
#define AR9170_TX_MAC_DISABLE_TXOP              0x1000
#define AR9170_TX_MAC_TXOP_RIFS                 0x2000
#define AR9170_TX_MAC_IMM_BA                    0x4000

/* either-or */
#define AR9170_TX_PHY_MOD_CCK                   0x00000000
#define AR9170_TX_PHY_MOD_OFDM                  0x00000001
#define AR9170_TX_PHY_MOD_HT                    0x00000002

/* depends on modulation */
#define AR9170_TX_PHY_SHORT_PREAMBLE            0x00000004
#define AR9170_TX_PHY_GREENFIELD                0x00000004

#define AR9170_TX_PHY_BW_S                      3
#define AR9170_TX_PHY_BW                        (3 << AR9170_TX_PHY_BW_SHIFT)
#define AR9170_TX_PHY_BW_20MHZ                  0
#define AR9170_TX_PHY_BW_40MHZ                  2
#define AR9170_TX_PHY_BW_40MHZ_DUP              3

#define AR9170_TX_PHY_TX_HEAVY_CLIP_S           6
#define AR9170_TX_PHY_TX_HEAVY_CLIP             (7 << \
                                                 AR9170_TX_PHY_TX_HEAVY_CLIP_S)

#define AR9170_TX_PHY_TX_PWR_S                  9
#define AR9170_TX_PHY_TX_PWR                    (0x3f << \
                                                 AR9170_TX_PHY_TX_PWR_S)

#define AR9170_TX_PHY_TXCHAIN_S                 15
#define AR9170_TX_PHY_TXCHAIN                   (7 << \
                                                 AR9170_TX_PHY_TXCHAIN_S)
#define AR9170_TX_PHY_TXCHAIN_1                 1
/* use for cck, ofdm 6/9/12/18/24 and HT if capable */
#define AR9170_TX_PHY_TXCHAIN_2                 5

#define AR9170_TX_PHY_MCS_S                     18
#define AR9170_TX_PHY_MCS                       (0x7f << \
                                                 AR9170_TX_PHY_MCS_S)

#define AR9170_TX_PHY_RATE_CCK_1M               0x0
#define AR9170_TX_PHY_RATE_CCK_2M               0x1
#define AR9170_TX_PHY_RATE_CCK_5M               0x2
#define AR9170_TX_PHY_RATE_CCK_11M              0x3

/* same as AR9170_RX_PHY_RATE */
#define AR9170_TXRX_PHY_RATE_OFDM_6M            0xb
#define AR9170_TXRX_PHY_RATE_OFDM_9M            0xf
#define AR9170_TXRX_PHY_RATE_OFDM_12M           0xa
#define AR9170_TXRX_PHY_RATE_OFDM_18M           0xe
#define AR9170_TXRX_PHY_RATE_OFDM_24M           0x9
#define AR9170_TXRX_PHY_RATE_OFDM_36M           0xd
#define AR9170_TXRX_PHY_RATE_OFDM_48M           0x8
#define AR9170_TXRX_PHY_RATE_OFDM_54M           0xc

#define AR9170_TXRX_PHY_RATE_HT_MCS0            0x0
#define AR9170_TXRX_PHY_RATE_HT_MCS1            0x1
#define AR9170_TXRX_PHY_RATE_HT_MCS2            0x2
#define AR9170_TXRX_PHY_RATE_HT_MCS3            0x3
#define AR9170_TXRX_PHY_RATE_HT_MCS4            0x4
#define AR9170_TXRX_PHY_RATE_HT_MCS5            0x5
#define AR9170_TXRX_PHY_RATE_HT_MCS6            0x6
#define AR9170_TXRX_PHY_RATE_HT_MCS7            0x7
#define AR9170_TXRX_PHY_RATE_HT_MCS8            0x8
#define AR9170_TXRX_PHY_RATE_HT_MCS9            0x9
#define AR9170_TXRX_PHY_RATE_HT_MCS10           0xa
#define AR9170_TXRX_PHY_RATE_HT_MCS11           0xb
#define AR9170_TXRX_PHY_RATE_HT_MCS12           0xc
#define AR9170_TXRX_PHY_RATE_HT_MCS13           0xd
#define AR9170_TXRX_PHY_RATE_HT_MCS14           0xe
#define AR9170_TXRX_PHY_RATE_HT_MCS15           0xf

#define AR9170_TX_PHY_SHORT_GI                  0x80000000

#ifdef __CARL9170FW__
struct ar9170_tx_hw_mac_control {
        union {
                struct {
                        /*
                         * Beware of compiler bugs in all gcc pre 4.4!
                         */

                        u8 erp_prot:2;
                        u8 no_ack:1;
                        u8 backoff:1;
                        u8 burst:1;
                        u8 ampdu:1;

                        u8 enc_mode:2;

                        u8 hw_mmic:1;
                        u8 hw_duration:1;

                        u8 qos_queue:2;

                        u8 disable_txop:1;
                        u8 txop_rifs:1;

                        u8 ba_end:1;
                        u8 probe:1;
                } __packed;

                __le16 set;
        } __packed;
} __packed;

struct ar9170_tx_hw_phy_control {
        union {
                struct {
                        /*
                         * Beware of compiler bugs in all gcc pre 4.4!
                         */

                        u8 modulation:2;
                        u8 preamble:1;
                        u8 bandwidth:2;
                        u8:1;
                        u8 heavy_clip:3;
                        u8 tx_power:6;
                        u8 chains:3;
                        u8 mcs:7;
                        u8:6;
                        u8 short_gi:1;
                } __packed;

                __le32 set;
        } __packed;
} __packed;

struct ar9170_tx_rate_info {
        u8 tries:3;
        u8 erp_prot:2;
        u8 ampdu:1;
        u8 free:2; /* free for use (e.g.:RIFS/TXOP/AMPDU) */
} __packed;

struct carl9170_tx_superdesc {
        __le16 len;
        u8 rix;
        u8 cnt;
        u8 cookie;
        u8 ampdu_density:3;
        u8 ampdu_factor:2;
        u8 ampdu_commit_density:1;
        u8 ampdu_commit_factor:1;
        u8 ampdu_unused_bit:1;
        u8 queue:2;
        u8 assign_seq:1;
        u8 vif_id:3;
        u8 fill_in_tsf:1;
        u8 cab:1;
        u8 padding2;
        struct ar9170_tx_rate_info ri[CARL9170_TX_MAX_RATES];
        struct ar9170_tx_hw_phy_control rr[CARL9170_TX_MAX_RETRY_RATES];
} __packed;

struct ar9170_tx_hwdesc {
        __le16 length;
        struct ar9170_tx_hw_mac_control mac;
        struct ar9170_tx_hw_phy_control phy;
} __packed;

struct ar9170_tx_frame {
        struct ar9170_tx_hwdesc hdr;

        union {
                struct ieee80211_hdr i3e;
                DECLARE_FLEX_ARRAY(u8, payload);
        } data;
} __packed;

struct carl9170_tx_superframe {
        struct carl9170_tx_superdesc s;
        struct ar9170_tx_frame f;
} __packed __aligned(4);

#endif /* __CARL9170FW__ */

struct _ar9170_tx_hwdesc {
        __le16 length;
        __le16 mac_control;
        __le32 phy_control;
} __packed;

#define CARL9170_TX_SUPER_AMPDU_DENSITY_S               0
#define CARL9170_TX_SUPER_AMPDU_DENSITY                 0x7
#define CARL9170_TX_SUPER_AMPDU_FACTOR                  0x18
#define CARL9170_TX_SUPER_AMPDU_FACTOR_S                3
#define CARL9170_TX_SUPER_AMPDU_COMMIT_DENSITY          0x20
#define CARL9170_TX_SUPER_AMPDU_COMMIT_DENSITY_S        5
#define CARL9170_TX_SUPER_AMPDU_COMMIT_FACTOR           0x40
#define CARL9170_TX_SUPER_AMPDU_COMMIT_FACTOR_S         6

#define CARL9170_TX_SUPER_MISC_QUEUE                    0x3
#define CARL9170_TX_SUPER_MISC_QUEUE_S                  0
#define CARL9170_TX_SUPER_MISC_ASSIGN_SEQ               0x4
#define CARL9170_TX_SUPER_MISC_VIF_ID                   0x38
#define CARL9170_TX_SUPER_MISC_VIF_ID_S                 3
#define CARL9170_TX_SUPER_MISC_FILL_IN_TSF              0x40
#define CARL9170_TX_SUPER_MISC_CAB                      0x80

#define CARL9170_TX_SUPER_RI_TRIES                      0x7
#define CARL9170_TX_SUPER_RI_TRIES_S                    0
#define CARL9170_TX_SUPER_RI_ERP_PROT                   0x18
#define CARL9170_TX_SUPER_RI_ERP_PROT_S                 3
#define CARL9170_TX_SUPER_RI_AMPDU                      0x20
#define CARL9170_TX_SUPER_RI_AMPDU_S                    5

struct _carl9170_tx_superdesc {
        __le16 len;
        u8 rix;
        u8 cnt;
        u8 cookie;
        u8 ampdu_settings;
        u8 misc;
        u8 padding;
        u8 ri[CARL9170_TX_MAX_RATES];
        __le32 rr[CARL9170_TX_MAX_RETRY_RATES];
} __packed;

struct _carl9170_tx_superframe {
        struct _carl9170_tx_superdesc s;
        struct _ar9170_tx_hwdesc f;
        u8 frame_data[];
} __packed __aligned(4);

#define CARL9170_TX_SUPERDESC_LEN               24
#define AR9170_TX_HWDESC_LEN                    8
#define CARL9170_TX_SUPERFRAME_LEN              (CARL9170_TX_SUPERDESC_LEN + \
                                                 AR9170_TX_HWDESC_LEN)

struct ar9170_rx_head {
        u8 plcp[12];
} __packed;

#define AR9170_RX_HEAD_LEN                      12

struct ar9170_rx_phystatus {
        union {
                struct {
                        u8 rssi_ant0, rssi_ant1, rssi_ant2,
                                rssi_ant0x, rssi_ant1x, rssi_ant2x,
                                rssi_combined;
                } __packed;
                u8 rssi[7];
        } __packed;

        u8 evm_stream0[6], evm_stream1[6];
        u8 phy_err;
} __packed;

#define AR9170_RX_PHYSTATUS_LEN                 20

struct ar9170_rx_macstatus {
        u8 SAidx, DAidx;
        u8 error;
        u8 status;
} __packed;

#define AR9170_RX_MACSTATUS_LEN                 4

struct ar9170_rx_frame_single {
        struct ar9170_rx_head phy_head;
        struct ieee80211_hdr i3e __packed __aligned(2);
        struct ar9170_rx_phystatus phy_tail;
        struct ar9170_rx_macstatus macstatus;
};

struct ar9170_rx_frame_head {
        struct ar9170_rx_head phy_head;
        struct ieee80211_hdr i3e __packed __aligned(2);
        struct ar9170_rx_macstatus macstatus;
};

struct ar9170_rx_frame_middle {
        struct ieee80211_hdr i3e __packed __aligned(2);
        struct ar9170_rx_macstatus macstatus;
};

struct ar9170_rx_frame_tail {
        struct ieee80211_hdr i3e __packed __aligned(2);
        struct ar9170_rx_phystatus phy_tail;
        struct ar9170_rx_macstatus macstatus;
};

struct ar9170_rx_frame {
        union {
                struct ar9170_rx_frame_single single;
                struct ar9170_rx_frame_head head;
                struct ar9170_rx_frame_middle middle;
                struct ar9170_rx_frame_tail tail;
        };
};

static inline u8 ar9170_get_decrypt_type(struct ar9170_rx_macstatus *t)
{
        return (t->SAidx & 0xc0) >> 4 |
               (t->DAidx & 0xc0) >> 6;
}

/*
 * This is an workaround for several undocumented bugs.
 * Don't mess with the QoS/AC <-> HW Queue map, if you don't
 * know what you are doing.
 *
 * Known problems [hardware]:
 *  * The MAC does not aggregate frames on anything other
 *    than the first HW queue.
 *  * when an AMPDU is placed [in the first hw queue] and
 *    additional frames are already queued on a different
 *    hw queue, the MAC will ALWAYS freeze.
 *
 * In a nutshell: The hardware can either do QoS or
 * Aggregation but not both at the same time. As a
 * result, this makes the device pretty much useless
 * for any serious 802.11n setup.
 */
enum ar9170_txq {
        AR9170_TXQ_BK = 0,      /* TXQ0 */
        AR9170_TXQ_BE,          /* TXQ1 */
        AR9170_TXQ_VI,          /* TXQ2 */
        AR9170_TXQ_VO,          /* TXQ3 */

        __AR9170_NUM_TXQ,
};

#define AR9170_TXQ_DEPTH                        32

#endif /* __CARL9170_SHARED_WLAN_H */