/*
 * Shared CARL9170 Header
 *
 * Firmware descriptor format
 *
 * 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/.
 */

#ifndef __CARL9170_SHARED_FWDESC_H
#define __CARL9170_SHARED_FWDESC_H

/* NOTE: Don't mess with the order of the flags! */
enum carl9170fw_feature_list {
        /* Always set */
        CARL9170FW_DUMMY_FEATURE,

        /*
         * Indicates that this image has special boot block which prevents
         * legacy drivers to drive the firmware.
         */
        CARL9170FW_MINIBOOT,

        /* usb registers are initialized by the firmware */
        CARL9170FW_USB_INIT_FIRMWARE,

        /* command traps & notifications are send through EP2 */
        CARL9170FW_USB_RESP_EP2,

        /* usb download (app -> fw) stream */
        CARL9170FW_USB_DOWN_STREAM,

        /* usb upload (fw -> app) stream */
        CARL9170FW_USB_UP_STREAM,

        /* unusable - reserved to flag non-functional debug firmwares */
        CARL9170FW_UNUSABLE,

        /* AR9170_CMD_RF_INIT, AR9170_CMD_FREQ_START, AR9170_CMD_FREQUENCY */
        CARL9170FW_COMMAND_PHY,

        /* AR9170_CMD_EKEY, AR9170_CMD_DKEY */
        CARL9170FW_COMMAND_CAM,

        /* Firmware has a software Content After Beacon Queueing mechanism */
        CARL9170FW_WLANTX_CAB,

        /* The firmware is capable of responding to incoming BAR frames */
        CARL9170FW_HANDLE_BACK_REQ,

        /* GPIO Interrupt | CARL9170_RSP_GPIO */
        CARL9170FW_GPIO_INTERRUPT,

        /* Firmware PSM support | CARL9170_CMD_PSM */
        CARL9170FW_PSM,

        /* Firmware RX filter | CARL9170_CMD_RX_FILTER */
        CARL9170FW_RX_FILTER,

        /* Wake up on WLAN */
        CARL9170FW_WOL,

        /* Firmware supports PSM in the 5GHZ Band */
        CARL9170FW_FIXED_5GHZ_PSM,

        /* HW (ANI, CCA, MIB) tally counters */
        CARL9170FW_HW_COUNTERS,

        /* Firmware will pass BA when BARs are queued */
        CARL9170FW_RX_BA_FILTER,

        /* Firmware has support to write a byte at a time */
        CARL9170FW_HAS_WREGB_CMD,

        /* Pattern generator */
        CARL9170FW_PATTERN_GENERATOR,

        /* KEEP LAST */
        __CARL9170FW_FEATURE_NUM
};

#define OTUS_MAGIC      "OTAR"
#define MOTD_MAGIC      "MOTD"
#define FIX_MAGIC       "FIX\0"
#define DBG_MAGIC       "DBG\0"
#define CHK_MAGIC       "CHK\0"
#define TXSQ_MAGIC      "TXSQ"
#define WOL_MAGIC       "WOL\0"
#define LAST_MAGIC      "LAST"

#define CARL9170FW_SET_DAY(d) (((d) - 1) % 31)
#define CARL9170FW_SET_MONTH(m) ((((m) - 1) % 12) * 31)
#define CARL9170FW_SET_YEAR(y) (((y) - 10) * 372)

#define CARL9170FW_GET_DAY(d) (((d) % 31) + 1)
#define CARL9170FW_GET_MONTH(m) ((((m) / 31) % 12) + 1)
#define CARL9170FW_GET_YEAR(y) ((y) / 372 + 10)

#define CARL9170FW_MAGIC_SIZE                   4

struct carl9170fw_desc_head {
        u8      magic[CARL9170FW_MAGIC_SIZE];
        __le16 length;
        u8 min_ver;
        u8 cur_ver;
} __packed;
#define CARL9170FW_DESC_HEAD_SIZE                       \
        (sizeof(struct carl9170fw_desc_head))

#define CARL9170FW_OTUS_DESC_MIN_VER            6
#define CARL9170FW_OTUS_DESC_CUR_VER            7
struct carl9170fw_otus_desc {
        struct carl9170fw_desc_head head;
        __le32 feature_set;
        __le32 fw_address;
        __le32 bcn_addr;
        __le16 bcn_len;
        __le16 miniboot_size;
        __le16 tx_frag_len;
        __le16 rx_max_frame_len;
        u8 tx_descs;
        u8 cmd_bufs;
        u8 api_ver;
        u8 vif_num;
} __packed;
#define CARL9170FW_OTUS_DESC_SIZE                       \
        (sizeof(struct carl9170fw_otus_desc))

#define CARL9170FW_MOTD_STRING_LEN                      24
#define CARL9170FW_MOTD_RELEASE_LEN                     20
#define CARL9170FW_MOTD_DESC_MIN_VER                    1
#define CARL9170FW_MOTD_DESC_CUR_VER                    2
struct carl9170fw_motd_desc {
        struct carl9170fw_desc_head head;
        __le32 fw_year_month_day;
        char desc[CARL9170FW_MOTD_STRING_LEN];
        char release[CARL9170FW_MOTD_RELEASE_LEN];
} __packed;
#define CARL9170FW_MOTD_DESC_SIZE                       \
        (sizeof(struct carl9170fw_motd_desc))

#define CARL9170FW_FIX_DESC_MIN_VER                     1
#define CARL9170FW_FIX_DESC_CUR_VER                     2
struct carl9170fw_fix_entry {
        __le32 address;
        __le32 mask;
        __le32 value;
} __packed;

struct carl9170fw_fix_desc {
        struct carl9170fw_desc_head head;
        struct carl9170fw_fix_entry data[0];
} __packed;
#define CARL9170FW_FIX_DESC_SIZE                        \
        (sizeof(struct carl9170fw_fix_desc))

#define CARL9170FW_DBG_DESC_MIN_VER                     1
#define CARL9170FW_DBG_DESC_CUR_VER                     3
struct carl9170fw_dbg_desc {
        struct carl9170fw_desc_head head;

        __le32 bogoclock_addr;
        __le32 counter_addr;
        __le32 rx_total_addr;
        __le32 rx_overrun_addr;
        __le32 rx_filter;

        /* Put your debugging definitions here */
} __packed;
#define CARL9170FW_DBG_DESC_SIZE                        \
        (sizeof(struct carl9170fw_dbg_desc))

#define CARL9170FW_CHK_DESC_MIN_VER                     1
#define CARL9170FW_CHK_DESC_CUR_VER                     2
struct carl9170fw_chk_desc {
        struct carl9170fw_desc_head head;
        __le32 fw_crc32;
        __le32 hdr_crc32;
} __packed;
#define CARL9170FW_CHK_DESC_SIZE                        \
        (sizeof(struct carl9170fw_chk_desc))

#define CARL9170FW_TXSQ_DESC_MIN_VER                    1
#define CARL9170FW_TXSQ_DESC_CUR_VER                    1
struct carl9170fw_txsq_desc {
        struct carl9170fw_desc_head head;

        __le32 seq_table_addr;
} __packed;
#define CARL9170FW_TXSQ_DESC_SIZE                       \
        (sizeof(struct carl9170fw_txsq_desc))

#define CARL9170FW_WOL_DESC_MIN_VER                     1
#define CARL9170FW_WOL_DESC_CUR_VER                     1
struct carl9170fw_wol_desc {
        struct carl9170fw_desc_head head;

        __le32 supported_triggers;      /* CARL9170_WOL_ */
} __packed;
#define CARL9170FW_WOL_DESC_SIZE                        \
        (sizeof(struct carl9170fw_wol_desc))

#define CARL9170FW_LAST_DESC_MIN_VER                    1
#define CARL9170FW_LAST_DESC_CUR_VER                    2
struct carl9170fw_last_desc {
        struct carl9170fw_desc_head head;
} __packed;
#define CARL9170FW_LAST_DESC_SIZE                       \
        (sizeof(struct carl9170fw_fix_desc))

#define CARL9170FW_DESC_MAX_LENGTH                      8192

#define CARL9170FW_FILL_DESC(_magic, _length, _min_ver, _cur_ver)       \
        .head = {                                                       \
                .magic = _magic,                                        \
                .length = cpu_to_le16(_length),                         \
                .min_ver = _min_ver,                                    \
                .cur_ver = _cur_ver,                                    \
        }

static inline void carl9170fw_fill_desc(struct carl9170fw_desc_head *head,
                                         u8 magic[CARL9170FW_MAGIC_SIZE],
                                         __le16 length, u8 min_ver, u8 cur_ver)
{
        head->magic[0] = magic[0];
        head->magic[1] = magic[1];
        head->magic[2] = magic[2];
        head->magic[3] = magic[3];

        head->length = length;
        head->min_ver = min_ver;
        head->cur_ver = cur_ver;
}

#define carl9170fw_for_each_hdr(desc, fw_desc)                          \
        for (desc = fw_desc;                                            \
             memcmp(desc->magic, LAST_MAGIC, CARL9170FW_MAGIC_SIZE) &&  \
             le16_to_cpu(desc->length) >= CARL9170FW_DESC_HEAD_SIZE &&  \
             le16_to_cpu(desc->length) < CARL9170FW_DESC_MAX_LENGTH;    \
             desc = (void *)((unsigned long)desc + le16_to_cpu(desc->length)))

#define CHECK_HDR_VERSION(head, _min_ver)                               \
        (((head)->cur_ver < _min_ver) || ((head)->min_ver > _min_ver))  \

static inline bool carl9170fw_supports(__le32 list, u8 feature)
{
        return le32_to_cpu(list) & BIT(feature);
}

static inline bool carl9170fw_desc_cmp(const struct carl9170fw_desc_head *head,
                                       const u8 descid[CARL9170FW_MAGIC_SIZE],
                                       u16 min_len, u8 compatible_revision)
{
        if (descid[0] == head->magic[0] && descid[1] == head->magic[1] &&
            descid[2] == head->magic[2] && descid[3] == head->magic[3] &&
            !CHECK_HDR_VERSION(head, compatible_revision) &&
            (le16_to_cpu(head->length) >= min_len))
                return true;

        return false;
}

#define CARL9170FW_MIN_SIZE     32
#define CARL9170FW_MAX_SIZE     16384

static inline bool carl9170fw_size_check(unsigned int len)
{
        return (len <= CARL9170FW_MAX_SIZE && len >= CARL9170FW_MIN_SIZE);
}

#endif /* __CARL9170_SHARED_FWDESC_H */