/*
 * Shared Atheros AR9170 Header
 *
 * Firmware command interface definitions
 *
 * 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_FWCMD_H
#define __CARL9170_SHARED_FWCMD_H

#define CARL9170_MAX_CMD_LEN            64
#define CARL9170_MAX_CMD_PAYLOAD_LEN    60

#define CARL9170FW_API_MIN_VER          1
#define CARL9170FW_API_MAX_VER          1

enum carl9170_cmd_oids {
        CARL9170_CMD_RREG               = 0x00,
        CARL9170_CMD_WREG               = 0x01,
        CARL9170_CMD_ECHO               = 0x02,
        CARL9170_CMD_SWRST              = 0x03,
        CARL9170_CMD_REBOOT             = 0x04,
        CARL9170_CMD_BCN_CTRL           = 0x05,
        CARL9170_CMD_READ_TSF           = 0x06,
        CARL9170_CMD_RX_FILTER          = 0x07,
        CARL9170_CMD_WOL                = 0x08,
        CARL9170_CMD_TALLY              = 0x09,
        CARL9170_CMD_WREGB              = 0x0a,

        /* CAM */
        CARL9170_CMD_EKEY               = 0x10,
        CARL9170_CMD_DKEY               = 0x11,

        /* RF / PHY */
        CARL9170_CMD_FREQUENCY          = 0x20,
        CARL9170_CMD_RF_INIT            = 0x21,
        CARL9170_CMD_SYNTH              = 0x22,
        CARL9170_CMD_FREQ_START         = 0x23,
        CARL9170_CMD_PSM                = 0x24,

        /* Asychronous command flag */
        CARL9170_CMD_ASYNC_FLAG         = 0x40,
        CARL9170_CMD_WREG_ASYNC         = (CARL9170_CMD_WREG |
                                           CARL9170_CMD_ASYNC_FLAG),
        CARL9170_CMD_REBOOT_ASYNC       = (CARL9170_CMD_REBOOT |
                                           CARL9170_CMD_ASYNC_FLAG),
        CARL9170_CMD_BCN_CTRL_ASYNC     = (CARL9170_CMD_BCN_CTRL |
                                           CARL9170_CMD_ASYNC_FLAG),
        CARL9170_CMD_PSM_ASYNC          = (CARL9170_CMD_PSM |
                                           CARL9170_CMD_ASYNC_FLAG),

        /* responses and traps */
        CARL9170_RSP_FLAG               = 0xc0,
        CARL9170_RSP_PRETBTT            = 0xc0,
        CARL9170_RSP_TXCOMP             = 0xc1,
        CARL9170_RSP_BEACON_CONFIG      = 0xc2,
        CARL9170_RSP_ATIM               = 0xc3,
        CARL9170_RSP_WATCHDOG           = 0xc6,
        CARL9170_RSP_TEXT               = 0xca,
        CARL9170_RSP_HEXDUMP            = 0xcc,
        CARL9170_RSP_RADAR              = 0xcd,
        CARL9170_RSP_GPIO               = 0xce,
        CARL9170_RSP_BOOT               = 0xcf,
};

struct carl9170_set_key_cmd {
        __le16          user;
        __le16          keyId;
        __le16          type;
        u8              macAddr[6];
        u32             key[4];
} __packed __aligned(4);
#define CARL9170_SET_KEY_CMD_SIZE               28

struct carl9170_disable_key_cmd {
        __le16          user;
        __le16          padding;
} __packed __aligned(4);
#define CARL9170_DISABLE_KEY_CMD_SIZE           4

struct carl9170_u32_list {
        u32     vals[0];
} __packed;

struct carl9170_reg_list {
        __le32          regs[0];
} __packed;

struct carl9170_write_reg {
        DECLARE_FLEX_ARRAY(struct {
                __le32          addr;
                __le32          val;
        } __packed, regs);
} __packed;

struct carl9170_write_reg_byte {
        __le32  addr;
        __le32  count;
        u8      val[];
} __packed;

#define CARL9170FW_PHY_HT_ENABLE                0x4
#define CARL9170FW_PHY_HT_DYN2040               0x8
#define CARL9170FW_PHY_HT_EXT_CHAN_OFF          0x3
#define CARL9170FW_PHY_HT_EXT_CHAN_OFF_S        2

struct carl9170_rf_init {
        __le32          freq;
        u8              ht_settings;
        u8              padding2[3];
        __le32          delta_slope_coeff_exp;
        __le32          delta_slope_coeff_man;
        __le32          delta_slope_coeff_exp_shgi;
        __le32          delta_slope_coeff_man_shgi;
        __le32          finiteLoopCount;
} __packed;
#define CARL9170_RF_INIT_SIZE           28

struct carl9170_rf_init_result {
        __le32          ret;            /* AR9170_PHY_REG_AGC_CONTROL */
} __packed;
#define CARL9170_RF_INIT_RESULT_SIZE    4

#define CARL9170_PSM_SLEEP              0x1000
#define CARL9170_PSM_SOFTWARE           0
#define CARL9170_PSM_WAKE               0 /* internally used. */
#define CARL9170_PSM_COUNTER            0xfff
#define CARL9170_PSM_COUNTER_S          0

struct carl9170_psm {
        __le32          state;
} __packed;
#define CARL9170_PSM_SIZE               4

/*
 * Note: If a bit in rx_filter is set, then it
 * means that the particular frames which matches
 * the condition are FILTERED/REMOVED/DISCARDED!
 * (This is can be a bit confusing, especially
 * because someone people think it's the exact
 * opposite way, so watch out!)
 */
struct carl9170_rx_filter_cmd {
        __le32          rx_filter;
} __packed;
#define CARL9170_RX_FILTER_CMD_SIZE     4

#define CARL9170_RX_FILTER_BAD          0x01
#define CARL9170_RX_FILTER_OTHER_RA     0x02
#define CARL9170_RX_FILTER_DECRY_FAIL   0x04
#define CARL9170_RX_FILTER_CTL_OTHER    0x08
#define CARL9170_RX_FILTER_CTL_PSPOLL   0x10
#define CARL9170_RX_FILTER_CTL_BACKR    0x20
#define CARL9170_RX_FILTER_MGMT         0x40
#define CARL9170_RX_FILTER_DATA         0x80
#define CARL9170_RX_FILTER_EVERYTHING   (~0)

struct carl9170_bcn_ctrl_cmd {
        __le32          vif_id;
        __le32          mode;
        __le32          bcn_addr;
        __le32          bcn_len;
} __packed;
#define CARL9170_BCN_CTRL_CMD_SIZE      16

#define CARL9170_BCN_CTRL_DRAIN 0
#define CARL9170_BCN_CTRL_CAB_TRIGGER   1

struct carl9170_wol_cmd {
        __le32          flags;
        u8              mac[6];
        u8              bssid[6];
        __le32          null_interval;
        __le32          free_for_use2;
        __le32          mask;
        u8              pattern[32];
} __packed;

#define CARL9170_WOL_CMD_SIZE           60

#define CARL9170_WOL_DISCONNECT         1
#define CARL9170_WOL_MAGIC_PKT          2

struct carl9170_cmd_head {
        union {
                struct {
                        u8      len;
                        u8      cmd;
                        u8      seq;
                        u8      ext;
                } __packed;

                u32 hdr_data;
        } __packed;
} __packed;

struct carl9170_cmd {
        struct carl9170_cmd_head hdr;
        union {
                struct carl9170_set_key_cmd     setkey;
                struct carl9170_disable_key_cmd disablekey;
                struct carl9170_u32_list        echo;
                struct carl9170_reg_list        rreg;
                struct carl9170_write_reg       wreg;
                struct carl9170_write_reg_byte  wregb;
                struct carl9170_rf_init         rf_init;
                struct carl9170_psm             psm;
                struct carl9170_wol_cmd         wol;
                struct carl9170_bcn_ctrl_cmd    bcn_ctrl;
                struct carl9170_rx_filter_cmd   rx_filter;
                u8 data[CARL9170_MAX_CMD_PAYLOAD_LEN];
        } __packed __aligned(4);
} __packed __aligned(4);

#define CARL9170_TX_STATUS_QUEUE        3
#define CARL9170_TX_STATUS_QUEUE_S      0
#define CARL9170_TX_STATUS_RIX_S        2
#define CARL9170_TX_STATUS_RIX          (3 << CARL9170_TX_STATUS_RIX_S)
#define CARL9170_TX_STATUS_TRIES_S      4
#define CARL9170_TX_STATUS_TRIES        (7 << CARL9170_TX_STATUS_TRIES_S)
#define CARL9170_TX_STATUS_SUCCESS      0x80

#ifdef __CARL9170FW__
/*
 * NOTE:
 * Both structs [carl9170_tx_status and _carl9170_tx_status]
 * need to be "bit for bit" in sync.
 */
struct carl9170_tx_status {
        /*
         * Beware of compiler bugs in all gcc pre 4.4!
         */

        u8 cookie;
        u8 queue:2;
        u8 rix:2;
        u8 tries:3;
        u8 success:1;
} __packed;
#endif /* __CARL9170FW__ */

struct _carl9170_tx_status {
        /*
         * This version should be immune to all alignment bugs.
         */

        u8 cookie;
        u8 info;
} __packed;
#define CARL9170_TX_STATUS_SIZE         2

#define CARL9170_RSP_TX_STATUS_NUM      (CARL9170_MAX_CMD_PAYLOAD_LEN / \
                                         sizeof(struct _carl9170_tx_status))

#define CARL9170_TX_MAX_RATE_TRIES      7

#define CARL9170_TX_MAX_RATES           4
#define CARL9170_TX_MAX_RETRY_RATES     (CARL9170_TX_MAX_RATES - 1)
#define CARL9170_ERR_MAGIC              "ERR:"
#define CARL9170_BUG_MAGIC              "BUG:"

struct carl9170_gpio {
        __le32 gpio;
} __packed;
#define CARL9170_GPIO_SIZE              4

struct carl9170_tsf_rsp {
        union {
                __le32 tsf[2];
                __le64 tsf_64;
        } __packed;
} __packed;
#define CARL9170_TSF_RSP_SIZE           8

struct carl9170_tally_rsp {
        __le32 active;
        __le32 cca;
        __le32 tx_time;
        __le32 rx_total;
        __le32 rx_overrun;
        __le32 tick;
} __packed;

struct carl9170_rsp {
        struct carl9170_cmd_head hdr;

        union {
                struct carl9170_rf_init_result  rf_init_res;
                struct carl9170_u32_list        rreg_res;
                struct carl9170_u32_list        echo;
#ifdef __CARL9170FW__
                DECLARE_FLEX_ARRAY(struct carl9170_tx_status, tx_status);
#endif /* __CARL9170FW__ */
                DECLARE_FLEX_ARRAY(struct _carl9170_tx_status, _tx_status);
                struct carl9170_gpio            gpio;
                struct carl9170_tsf_rsp         tsf;
                struct carl9170_psm             psm;
                struct carl9170_tally_rsp       tally;
                u8 data[CARL9170_MAX_CMD_PAYLOAD_LEN];
        } __packed;
} __packed __aligned(4);

#endif /* __CARL9170_SHARED_FWCMD_H */