/*
 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
 *
 * 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 __MT76x2_H
#define __MT76x2_H

#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/spinlock.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/mutex.h>
#include <linux/bitops.h>
#include <linux/kfifo.h>
#include <linux/average.h>

#define MT7662_FIRMWARE		"mt7662.bin"
#define MT7662_ROM_PATCH	"mt7662_rom_patch.bin"
#define MT7662_EEPROM_SIZE	512

#define MT7662U_FIRMWARE	"mediatek/mt7662u.bin"
#define MT7662U_ROM_PATCH	"mediatek/mt7662u_rom_patch.bin"

#define MT76x2_RX_RING_SIZE	256
#define MT_RX_HEADROOM		32

#define MT_MAX_CHAINS		2

#define MT_CALIBRATE_INTERVAL	HZ

#define MT_MAX_VIFS		8
#define MT_VIF_WCID(_n)		(254 - ((_n) & 7))

#include "mt76.h"
#include "mt76x2_regs.h"
#include "mt76x2_mac.h"
#include "mt76x2_dfs.h"

DECLARE_EWMA(signal, 10, 8)

struct mt76x2_mcu {
	struct mutex mutex;

	wait_queue_head_t wait;
	struct sk_buff_head res_q;
	struct mt76u_buf res_u;

	u32 msg_seq;
};

struct mt76x2_rx_freq_cal {
	s8 high_gain[MT_MAX_CHAINS];
	s8 rssi_offset[MT_MAX_CHAINS];
	s8 lna_gain;
	u32 mcu_gain;
};

struct mt76x2_calibration {
	struct mt76x2_rx_freq_cal rx;

	u8 agc_gain_init[MT_MAX_CHAINS];
	u8 agc_gain_cur[MT_MAX_CHAINS];

	u16 false_cca;
	s8 avg_rssi_all;
	s8 agc_gain_adjust;
	s8 low_gain;

	u8 temp;

	bool init_cal_done;
	bool tssi_cal_done;
	bool tssi_comp_pending;
	bool dpd_cal_done;
	bool channel_cal_done;
};

struct mt76x2_dev {
	struct mt76_dev mt76; /* must be first */

	struct mac_address macaddr_list[8];

	struct mutex mutex;

	const u16 *beacon_offsets;
	unsigned long wcid_mask[128 / BITS_PER_LONG];

	int txpower_conf;
	int txpower_cur;

	u8 txdone_seq;
	DECLARE_KFIFO_PTR(txstatus_fifo, struct mt76x2_tx_status);

	struct mt76x2_mcu mcu;
	struct sk_buff *rx_head;

	struct tasklet_struct tx_tasklet;
	struct tasklet_struct pre_tbtt_tasklet;
	struct delayed_work cal_work;
	struct delayed_work mac_work;

	u32 aggr_stats[32];

	struct mt76_wcid global_wcid;
	struct mt76_wcid __rcu *wcid[128];

	spinlock_t irq_lock;
	u32 irqmask;

	struct sk_buff *beacons[8];
	u8 beacon_mask;
	u8 beacon_data_mask;

	u8 tbtt_count;
	u16 beacon_int;

	u16 chainmask;

	u32 rxfilter;

	struct mt76x2_calibration cal;

	s8 target_power;
	s8 target_power_delta[2];
	struct mt76_rate_power rate_power;
	bool enable_tpc;

	u8 coverage_class;
	u8 slottime;

	struct mt76x2_dfs_pattern_detector dfs_pd;
};

struct mt76x2_vif {
	u8 idx;

	struct mt76_wcid group_wcid;
};

struct mt76x2_sta {
	struct mt76_wcid wcid; /* must be first */

	struct mt76x2_vif *vif;
	struct mt76x2_tx_status status;
	int n_frames;

	struct ewma_signal rssi;
	int inactive_count;
};

static inline bool mt76x2_wait_for_mac(struct mt76x2_dev *dev)
{
	int i;

	for (i = 0; i < 500; i++) {
		switch (mt76_rr(dev, MT_MAC_CSR0)) {
		case 0:
		case ~0:
			break;
		default:
			return true;
		}
		usleep_range(5000, 10000);
	}
	return false;
}

static inline bool is_mt7612(struct mt76x2_dev *dev)
{
	return mt76_chip(&dev->mt76) == 0x7612;
}

void mt76x2_set_irq_mask(struct mt76x2_dev *dev, u32 clear, u32 set);

static inline bool mt76x2_channel_silent(struct mt76x2_dev *dev)
{
	struct ieee80211_channel *chan = dev->mt76.chandef.chan;

	return ((chan->flags & IEEE80211_CHAN_RADAR) &&
		chan->dfs_state != NL80211_DFS_AVAILABLE);
}

static inline void mt76x2_irq_enable(struct mt76x2_dev *dev, u32 mask)
{
	mt76x2_set_irq_mask(dev, 0, mask);
}

static inline void mt76x2_irq_disable(struct mt76x2_dev *dev, u32 mask)
{
	mt76x2_set_irq_mask(dev, mask, 0);
}

static inline bool mt76x2_wait_for_bbp(struct mt76x2_dev *dev)
{
	return mt76_poll_msec(dev, MT_MAC_STATUS,
			      MT_MAC_STATUS_TX | MT_MAC_STATUS_RX,
			      0, 100);
}

static inline bool wait_for_wpdma(struct mt76x2_dev *dev)
{
	return mt76_poll(dev, MT_WPDMA_GLO_CFG,
			 MT_WPDMA_GLO_CFG_TX_DMA_BUSY |
			 MT_WPDMA_GLO_CFG_RX_DMA_BUSY,
			 0, 1000);
}

extern const struct ieee80211_ops mt76x2_ops;

extern struct ieee80211_rate mt76x2_rates[12];

struct mt76x2_dev *mt76x2_alloc_device(struct device *pdev);
int mt76x2_register_device(struct mt76x2_dev *dev);
void mt76x2_init_debugfs(struct mt76x2_dev *dev);
void mt76x2_init_device(struct mt76x2_dev *dev);

irqreturn_t mt76x2_irq_handler(int irq, void *dev_instance);
void mt76x2_phy_power_on(struct mt76x2_dev *dev);
int mt76x2_init_hardware(struct mt76x2_dev *dev);
void mt76x2_stop_hardware(struct mt76x2_dev *dev);
int mt76x2_eeprom_init(struct mt76x2_dev *dev);
int mt76x2_apply_calibration_data(struct mt76x2_dev *dev, int channel);
void mt76x2_set_tx_ackto(struct mt76x2_dev *dev);

void mt76x2_phy_set_antenna(struct mt76x2_dev *dev);
int mt76x2_phy_start(struct mt76x2_dev *dev);
int mt76x2_phy_set_channel(struct mt76x2_dev *dev,
			 struct cfg80211_chan_def *chandef);
int mt76x2_mac_get_rssi(struct mt76x2_dev *dev, s8 rssi, int chain);
void mt76x2_phy_calibrate(struct work_struct *work);
void mt76x2_phy_set_txpower(struct mt76x2_dev *dev);

int mt76x2_mcu_init(struct mt76x2_dev *dev);
int mt76x2_mcu_set_channel(struct mt76x2_dev *dev, u8 channel, u8 bw,
			   u8 bw_index, bool scan);
int mt76x2_mcu_set_radio_state(struct mt76x2_dev *dev, bool on);
int mt76x2_mcu_load_cr(struct mt76x2_dev *dev, u8 type, u8 temp_level,
		       u8 channel);
int mt76x2_mcu_cleanup(struct mt76x2_dev *dev);

int mt76x2_dma_init(struct mt76x2_dev *dev);
void mt76x2_dma_cleanup(struct mt76x2_dev *dev);

void mt76x2_cleanup(struct mt76x2_dev *dev);

int mt76x2_tx_queue_mcu(struct mt76x2_dev *dev, enum mt76_txq_id qid,
			struct sk_buff *skb, int cmd, int seq);
void mt76x2_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,
	       struct sk_buff *skb);
void mt76x2_tx_complete(struct mt76x2_dev *dev, struct sk_buff *skb);
int mt76x2_tx_prepare_skb(struct mt76_dev *mdev, void *txwi,
			  struct sk_buff *skb, struct mt76_queue *q,
			  struct mt76_wcid *wcid, struct ieee80211_sta *sta,
			  u32 *tx_info);
void mt76x2_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue *q,
			    struct mt76_queue_entry *e, bool flush);
void mt76x2_mac_set_tx_protection(struct mt76x2_dev *dev, u32 val);

void mt76x2_pre_tbtt_tasklet(unsigned long arg);

void mt76x2_rx_poll_complete(struct mt76_dev *mdev, enum mt76_rxq_id q);
void mt76x2_queue_rx_skb(struct mt76_dev *mdev, enum mt76_rxq_id q,
			 struct sk_buff *skb);

void mt76x2_sta_ps(struct mt76_dev *dev, struct ieee80211_sta *sta, bool ps);

void mt76x2_update_channel(struct mt76_dev *mdev);

s8 mt76x2_tx_get_max_txpwr_adj(struct mt76x2_dev *dev,
			       const struct ieee80211_tx_rate *rate);
s8 mt76x2_tx_get_txpwr_adj(struct mt76x2_dev *dev, s8 txpwr, s8 max_txpwr_adj);
void mt76x2_tx_set_txpwr_auto(struct mt76x2_dev *dev, s8 txpwr);

int mt76x2_insert_hdr_pad(struct sk_buff *skb);

bool mt76x2_mac_load_tx_status(struct mt76x2_dev *dev,
			       struct mt76x2_tx_status *stat);
void mt76x2_send_tx_status(struct mt76x2_dev *dev,
			   struct mt76x2_tx_status *stat, u8 *update);
void mt76x2_reset_wlan(struct mt76x2_dev *dev, bool enable);
void mt76x2_init_txpower(struct mt76x2_dev *dev,
			 struct ieee80211_supported_band *sband);
void mt76_write_mac_initvals(struct mt76x2_dev *dev);

int mt76x2_ampdu_action(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
			struct ieee80211_ampdu_params *params);
int mt76x2_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
		   struct ieee80211_sta *sta);
int mt76x2_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
		      struct ieee80211_sta *sta);
void mt76x2_remove_interface(struct ieee80211_hw *hw,
			     struct ieee80211_vif *vif);
int mt76x2_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
		   struct ieee80211_vif *vif, struct ieee80211_sta *sta,
		   struct ieee80211_key_conf *key);
int mt76x2_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
		   u16 queue, const struct ieee80211_tx_queue_params *params);
void mt76x2_configure_filter(struct ieee80211_hw *hw,
			     unsigned int changed_flags,
			     unsigned int *total_flags, u64 multicast);
void mt76x2_txq_init(struct mt76x2_dev *dev, struct ieee80211_txq *txq);
void mt76x2_sta_rate_tbl_update(struct ieee80211_hw *hw,
				struct ieee80211_vif *vif,
				struct ieee80211_sta *sta);

void mt76x2_phy_set_txpower_regs(struct mt76x2_dev *dev,
				 enum nl80211_band band);
void mt76x2_configure_tx_delay(struct mt76x2_dev *dev,
			       enum nl80211_band band, u8 bw);
void mt76x2_phy_set_bw(struct mt76x2_dev *dev, int width, u8 ctrl);
void mt76x2_phy_set_band(struct mt76x2_dev *dev, int band, bool primary_upper);
int mt76x2_phy_get_min_avg_rssi(struct mt76x2_dev *dev);
void mt76x2_apply_gain_adj(struct mt76x2_dev *dev);

#endif