/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (c) 2021 pureLiFi
 */

#ifndef PLFXLC_MAC_H
#define PLFXLC_MAC_H

#include <linux/kernel.h>
#include <net/mac80211.h>

#include "chip.h"

#define PURELIFI_CCK                  0x00
#define PURELIFI_OFDM                 0x10
#define PURELIFI_CCK_PREA_SHORT       0x20

#define PURELIFI_OFDM_PLCP_RATE_6M      0xb
#define PURELIFI_OFDM_PLCP_RATE_9M      0xf
#define PURELIFI_OFDM_PLCP_RATE_12M     0xa
#define PURELIFI_OFDM_PLCP_RATE_18M     0xe
#define PURELIFI_OFDM_PLCP_RATE_24M     0x9
#define PURELIFI_OFDM_PLCP_RATE_36M     0xd
#define PURELIFI_OFDM_PLCP_RATE_48M     0x8
#define PURELIFI_OFDM_PLCP_RATE_54M     0xc

#define PURELIFI_CCK_RATE_1M    (PURELIFI_CCK | 0x00)
#define PURELIFI_CCK_RATE_2M    (PURELIFI_CCK | 0x01)
#define PURELIFI_CCK_RATE_5_5M  (PURELIFI_CCK | 0x02)
#define PURELIFI_CCK_RATE_11M   (PURELIFI_CCK | 0x03)
#define PURELIFI_OFDM_RATE_6M   (PURELIFI_OFDM | PURELIFI_OFDM_PLCP_RATE_6M)
#define PURELIFI_OFDM_RATE_9M   (PURELIFI_OFDM | PURELIFI_OFDM_PLCP_RATE_9M)
#define PURELIFI_OFDM_RATE_12M  (PURELIFI_OFDM | PURELIFI_OFDM_PLCP_RATE_12M)
#define PURELIFI_OFDM_RATE_18M  (PURELIFI_OFDM | PURELIFI_OFDM_PLCP_RATE_18M)
#define PURELIFI_OFDM_RATE_24M  (PURELIFI_OFDM | PURELIFI_OFDM_PLCP_RATE_24M)
#define PURELIFI_OFDM_RATE_36M  (PURELIFI_OFDM | PURELIFI_OFDM_PLCP_RATE_36M)
#define PURELIFI_OFDM_RATE_48M  (PURELIFI_OFDM | PURELIFI_OFDM_PLCP_RATE_48M)
#define PURELIFI_OFDM_RATE_54M  (PURELIFI_OFDM | PURELIFI_OFDM_PLCP_RATE_54M)

#define PURELIFI_RX_ERROR               0x80
#define PURELIFI_RX_CRC32_ERROR         0x10

#define PLF_REGDOMAIN_FCC       0x10
#define PLF_REGDOMAIN_IC        0x20
#define PLF_REGDOMAIN_ETSI      0x30
#define PLF_REGDOMAIN_SPAIN     0x31
#define PLF_REGDOMAIN_FRANCE    0x32
#define PLF_REGDOMAIN_JAPAN_2   0x40
#define PLF_REGDOMAIN_JAPAN     0x41
#define PLF_REGDOMAIN_JAPAN_3   0x49

#define PLF_RX_ERROR            0x80
#define PLF_RX_CRC32_ERROR      0x10

enum {
        MODULATION_RATE_BPSK_1_2 = 0,
        MODULATION_RATE_BPSK_3_4,
        MODULATION_RATE_QPSK_1_2,
        MODULATION_RATE_QPSK_3_4,
        MODULATION_RATE_QAM16_1_2,
        MODULATION_RATE_QAM16_3_4,
        MODULATION_RATE_QAM64_1_2,
        MODULATION_RATE_QAM64_3_4,
        MODULATION_RATE_AUTO,
        MODULATION_RATE_NUM
};

#define plfxlc_mac_dev(mac) plfxlc_chip_dev(&(mac)->chip)

#define PURELIFI_MAC_STATS_BUFFER_SIZE 16
#define PURELIFI_MAC_MAX_ACK_WAITERS 50

struct plfxlc_ctrlset {
        /* id should be plf_usb_req_enum */
        __be32          id;
        __be32          len;
        u8              modulation;
        u8              control;
        u8              service;
        u8              pad;
        __le16          packet_length;
        __le16          current_length;
        __le16          next_frame_length;
        __le16          tx_length;
        __be32          payload_len_nw;
} __packed;

/* overlay */
struct plfxlc_header {
        struct plfxlc_ctrlset plf_ctrl;
        u32    frametype;
        u8    *dmac;
} __packed;

struct tx_status {
        u8 type;
        u8 id;
        u8 rate;
        u8 pad;
        u8 mac[ETH_ALEN];
        u8 retry;
        u8 failure;
} __packed;

struct beacon {
        struct delayed_work watchdog_work;
        struct sk_buff *cur_beacon;
        unsigned long last_update;
        u16 interval;
        u8 period;
};

enum plfxlc_device_flags {
        PURELIFI_DEVICE_RUNNING,
};

struct plfxlc_mac {
        struct ieee80211_hw *hw;
        struct ieee80211_vif *vif;
        struct beacon beacon;
        struct work_struct set_rts_cts_work;
        struct work_struct process_intr;
        struct plfxlc_mc_hash multicast_hash;
        struct sk_buff_head ack_wait_queue;
        struct ieee80211_channel channels[14];
        struct ieee80211_rate rates[12];
        struct ieee80211_supported_band band;
        struct plfxlc_chip chip;
        spinlock_t lock; /* lock for mac data */
        u8 intr_buffer[USB_MAX_EP_INT_BUFFER];
        char serial_number[PURELIFI_SERIAL_LEN];
        unsigned char hw_address[ETH_ALEN];
        u8 default_regdomain;
        unsigned long flags;
        bool pass_failed_fcs;
        bool pass_ctrl;
        bool ack_pending;
        int ack_signal;
        int associated;
        u8 regdomain;
        u8 channel;
        int type;
        u64 crc_errors;
        u64 rssi;
};

static inline struct plfxlc_mac *
plfxlc_hw_mac(struct ieee80211_hw *hw)
{
        return hw->priv;
}

static inline struct plfxlc_mac *
plfxlc_chip_to_mac(struct plfxlc_chip *chip)
{
        return container_of(chip, struct plfxlc_mac, chip);
}

static inline struct plfxlc_mac *
plfxlc_usb_to_mac(struct plfxlc_usb *usb)
{
        return plfxlc_chip_to_mac(plfxlc_usb_to_chip(usb));
}

static inline u8 *plfxlc_mac_get_perm_addr(struct plfxlc_mac *mac)
{
        return mac->hw->wiphy->perm_addr;
}

struct ieee80211_hw *plfxlc_mac_alloc_hw(struct usb_interface *intf);
void plfxlc_mac_release_hw(struct ieee80211_hw *hw);

int plfxlc_mac_preinit_hw(struct ieee80211_hw *hw, const u8 *hw_address);
int plfxlc_mac_init_hw(struct ieee80211_hw *hw);

int plfxlc_mac_rx(struct ieee80211_hw *hw, const u8 *buffer,
                  unsigned int length);
void plfxlc_mac_tx_failed(struct urb *urb);
void plfxlc_mac_tx_to_dev(struct sk_buff *skb, int error);
int plfxlc_op_start(struct ieee80211_hw *hw);
void plfxlc_op_stop(struct ieee80211_hw *hw, bool suspend);
int plfxlc_restore_settings(struct plfxlc_mac *mac);

#endif /* PLFXLC_MAC_H */