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Commit 7b485902 authored by Stanislaw Gruszka's avatar Stanislaw Gruszka Committed by Kalle Valo
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mt76x0: core files 



Core files of mt76x0 driver.

mt76x0 driver adds support for Mediatek MT7610U based
USB Wi-Fi dongles.

Signed-off-by: default avatarStanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
parent ee676cd5

drivers/net/wireless/mediatek/mt76/mt76x0/core.c

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/*

 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>

 * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2

 * as published by the Free Software Foundation

 *

 * 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.

 */



#include "mt76x0.h"



int mt76x0_wait_asic_ready(struct mt76x0_dev *dev)

{

	int i = 100;

	u32 val;



	do {

		if (test_bit(MT76_REMOVED, &dev->mt76.state))

			return -EIO;



		val = mt76_rr(dev, MT_MAC_CSR0);

		if (val && ~val)

			return 0;



		udelay(10);

	} while (i--);



	return -EIO;

}

drivers/net/wireless/mediatek/mt76/mt76x0/mt76x0.h

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/*

 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>

 * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>

 * Copyright (C) 2018 Stanislaw Gruszka <stf_xl@wp.pl>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2

 * as published by the Free Software Foundation

 *

 * 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.

 */



#ifndef MT76X0U_H

#define MT76X0U_H



#include <linux/bitfield.h>

#include <linux/kernel.h>

#include <linux/device.h>

#include <linux/mutex.h>

#include <linux/usb.h>

#include <linux/completion.h>

#include <net/mac80211.h>

#include <linux/debugfs.h>



#include "../mt76.h"

#include "regs.h"



#define MT_CALIBRATE_INTERVAL		(4 * HZ)



#define MT_FREQ_CAL_INIT_DELAY		(30 * HZ)

#define MT_FREQ_CAL_CHECK_INTERVAL	(10 * HZ)

#define MT_FREQ_CAL_ADJ_INTERVAL	(HZ / 2)



#define MT_BBP_REG_VERSION		0x00



#define MT_USB_AGGR_SIZE_LIMIT		21 /* * 1024B */

#define MT_USB_AGGR_TIMEOUT		0x80 /* * 33ns */

#define MT_RX_ORDER			3

#define MT_RX_URB_SIZE			(PAGE_SIZE << MT_RX_ORDER)



struct mt76x0_dma_buf {

	struct urb *urb;

	void *buf;

	dma_addr_t dma;

	size_t len;

};



struct mt76x0_mcu {

	struct mutex mutex;



	u8 msg_seq;



	struct mt76x0_dma_buf resp;

	struct completion resp_cmpl;



	struct mt76_reg_pair *reg_pairs;

	unsigned int reg_pairs_len;

	u32 reg_base;

	bool burst_read;

};



struct mac_stats {

	u64 rx_stat[6];

	u64 tx_stat[6];

	u64 aggr_stat[2];

	u64 aggr_n[32];

	u64 zero_len_del[2];

};



#define N_RX_ENTRIES	16

struct mt76x0_rx_queue {

	struct mt76x0_dev *dev;



	struct mt76x0_dma_buf_rx {

		struct urb *urb;

		struct page *p;

	} e[N_RX_ENTRIES];



	unsigned int start;

	unsigned int end;

	unsigned int entries;

	unsigned int pending;

};



#define N_TX_ENTRIES	64



struct mt76x0_tx_queue {

	struct mt76x0_dev *dev;



	struct mt76x0_dma_buf_tx {

		struct urb *urb;

		struct sk_buff *skb;

	} e[N_TX_ENTRIES];



	unsigned int start;

	unsigned int end;

	unsigned int entries;

	unsigned int used;

	unsigned int fifo_seq;

};



/* WCID allocation:

 *     0: mcast wcid

 *     1: bssid wcid

 *  1...: STAs

 * ...7e: group wcids

 *    7f: reserved

 */

#define N_WCIDS		128

#define GROUP_WCID(idx)	(254 - idx)



struct mt76x0_eeprom_params;



#define MT_EE_TEMPERATURE_SLOPE		39

#define MT_FREQ_OFFSET_INVALID		-128



/* addr req mask */

#define MT_VEND_TYPE_EEPROM	BIT(31)

#define MT_VEND_TYPE_CFG	BIT(30)

#define MT_VEND_TYPE_MASK	(MT_VEND_TYPE_EEPROM | MT_VEND_TYPE_CFG)



#define MT_VEND_ADDR(type, n)	(MT_VEND_TYPE_##type | (n))



enum mt_temp_mode {

	MT_TEMP_MODE_NORMAL,

	MT_TEMP_MODE_HIGH,

	MT_TEMP_MODE_LOW,

};



enum mt_bw {

	MT_BW_20,

	MT_BW_40,

};



/**

 * struct mt76x0_dev - adapter structure

 * @lock:		protects @wcid->tx_rate.

 * @mac_lock:		locks out mac80211's tx status and rx paths.

 * @tx_lock:		protects @tx_q and changes of MT76_STATE_*_STATS

 *			flags in @state.

 * @rx_lock:		protects @rx_q.

 * @con_mon_lock:	protects @ap_bssid, @bcn_*, @avg_rssi.

 * @mutex:		ensures exclusive access from mac80211 callbacks.

 * @reg_atomic_mutex:	ensures atomicity of indirect register accesses

 *			(accesses to RF and BBP).

 * @hw_atomic_mutex:	ensures exclusive access to HW during critical

 *			operations (power management, channel switch).

 */

struct mt76x0_dev {

	struct mt76_dev mt76; /* must be first */



	struct mutex mutex;



	struct mutex usb_ctrl_mtx;

	u8 data[32];



	struct tasklet_struct rx_tasklet;

	struct tasklet_struct tx_tasklet;



	u8 out_ep[__MT_EP_OUT_MAX];

	u16 out_max_packet;

	u8 in_ep[__MT_EP_IN_MAX];

	u16 in_max_packet;



	unsigned long wcid_mask[DIV_ROUND_UP(N_WCIDS, BITS_PER_LONG)];

	unsigned long vif_mask;



	struct mt76x0_mcu mcu;



	struct delayed_work cal_work;

	struct delayed_work mac_work;



	struct workqueue_struct *stat_wq;

	struct delayed_work stat_work;



	struct mt76_wcid *mon_wcid;

	struct mt76_wcid __rcu *wcid[N_WCIDS];



	spinlock_t mac_lock;



	const u16 *beacon_offsets;



	u8 macaddr[ETH_ALEN];

	struct mt76x0_eeprom_params *ee;



	struct mutex reg_atomic_mutex;

	struct mutex hw_atomic_mutex;



	u32 rxfilter;

	u32 debugfs_reg;



	/* TX */

	spinlock_t tx_lock;

	struct mt76x0_tx_queue *tx_q;

	struct sk_buff_head tx_skb_done;



	atomic_t avg_ampdu_len;



	/* RX */

	spinlock_t rx_lock;

	struct mt76x0_rx_queue rx_q;



	/* Connection monitoring things */

	spinlock_t con_mon_lock;

	u8 ap_bssid[ETH_ALEN];



	s8 bcn_freq_off;

	u8 bcn_phy_mode;



	int avg_rssi; /* starts at 0 and converges */



	u8 agc_save;

	u16 chainmask;



	struct mac_stats stats;

};



struct mt76x0_wcid {

	u8 idx;

	u8 hw_key_idx;



	u16 tx_rate;

	bool tx_rate_set;

	u8 tx_rate_nss;

};



struct mt76_vif {

	u8 idx;



	struct mt76_wcid group_wcid;

};



struct mt76_tx_status {

	u8 valid:1;

	u8 success:1;

	u8 aggr:1;

	u8 ack_req:1;

	u8 is_probe:1;

	u8 wcid;

	u8 pktid;

	u8 retry;

	u16 rate;

} __packed __aligned(2);



struct mt76_sta {

	struct mt76_wcid wcid;

	struct mt76_tx_status status;

	int n_frames;

	u16 agg_ssn[IEEE80211_NUM_TIDS];

};



struct mt76_reg_pair {

	u32 reg;

	u32 value;

};



struct mt76x0_rxwi;



extern const struct ieee80211_ops mt76x0_ops;



static inline bool is_mt7610e(struct mt76x0_dev *dev)

{

	/* TODO */

	return false;

}



void mt76x0_init_debugfs(struct mt76x0_dev *dev);



int mt76x0_wait_asic_ready(struct mt76x0_dev *dev);



/* Compatibility with mt76 */

#define mt76_rmw_field(_dev, _reg, _field, _val)	\

	mt76_rmw(_dev, _reg, _field, FIELD_PREP(_field, _val))



int mt76x0_write_reg_pairs(struct mt76x0_dev *dev, u32 base,

			    const struct mt76_reg_pair *data, int len);

int mt76x0_read_reg_pairs(struct mt76x0_dev *dev, u32 base,

			  struct mt76_reg_pair *data, int len);

int mt76x0_burst_write_regs(struct mt76x0_dev *dev, u32 offset,

			     const u32 *data, int n);

void mt76x0_addr_wr(struct mt76x0_dev *dev, const u32 offset, const u8 *addr);



/* Init */

struct mt76x0_dev *mt76x0_alloc_device(struct device *dev);

int mt76x0_init_hardware(struct mt76x0_dev *dev);

int mt76x0_register_device(struct mt76x0_dev *dev);

void mt76x0_cleanup(struct mt76x0_dev *dev);



int mt76x0_mac_start(struct mt76x0_dev *dev);

void mt76x0_mac_stop(struct mt76x0_dev *dev);



/* PHY */

void mt76x0_phy_init(struct mt76x0_dev *dev);

int mt76x0_wait_bbp_ready(struct mt76x0_dev *dev);

void mt76x0_agc_save(struct mt76x0_dev *dev);

void mt76x0_agc_restore(struct mt76x0_dev *dev);

int mt76x0_phy_set_channel(struct mt76x0_dev *dev,

			    struct cfg80211_chan_def *chandef);

void mt76x0_phy_recalibrate_after_assoc(struct mt76x0_dev *dev);

int mt76x0_phy_get_rssi(struct mt76x0_dev *dev, struct mt76x0_rxwi *rxwi);

void mt76x0_phy_con_cal_onoff(struct mt76x0_dev *dev,

			       struct ieee80211_bss_conf *info);



/* MAC */

void mt76x0_mac_work(struct work_struct *work);

void mt76x0_mac_set_protection(struct mt76x0_dev *dev, bool legacy_prot,

				int ht_mode);

void mt76x0_mac_set_short_preamble(struct mt76x0_dev *dev, bool short_preamb);

void mt76x0_mac_config_tsf(struct mt76x0_dev *dev, bool enable, int interval);

void

mt76x0_mac_wcid_setup(struct mt76x0_dev *dev, u8 idx, u8 vif_idx, u8 *mac);

void mt76x0_mac_set_ampdu_factor(struct mt76x0_dev *dev);



/* TX */

void mt76x0_tx(struct ieee80211_hw *hw, struct ieee80211_tx_control *control,

		struct sk_buff *skb);

int mt76x0_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,

		    u16 queue, const struct ieee80211_tx_queue_params *params);

void mt76x0_tx_status(struct mt76x0_dev *dev, struct sk_buff *skb);

void mt76x0_tx_stat(struct work_struct *work);



/* util */

void mt76_remove_hdr_pad(struct sk_buff *skb);

int mt76_insert_hdr_pad(struct sk_buff *skb);



int mt76x0_dma_init(struct mt76x0_dev *dev);

void mt76x0_dma_cleanup(struct mt76x0_dev *dev);



int mt76x0_dma_enqueue_tx(struct mt76x0_dev *dev, struct sk_buff *skb,

			   struct mt76_wcid *wcid, int hw_q);



#endif

drivers/net/wireless/mediatek/mt76/mt76x0/regs.h

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drivers/net/wireless/mediatek/mt76/mt76x0/util.c

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/*

 * Copyright (C) 2014 Felix Fietkau <nbd@openwrt.org>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2

 * as published by the Free Software Foundation

 *

 * 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.

 */



#include "mt76x0.h"



void mt76_remove_hdr_pad(struct sk_buff *skb)

{

	int len = ieee80211_get_hdrlen_from_skb(skb);



	memmove(skb->data + 2, skb->data, len);

	skb_pull(skb, 2);

}



int mt76_insert_hdr_pad(struct sk_buff *skb)

{

	int len = ieee80211_get_hdrlen_from_skb(skb);

	int ret;



	if (len % 4 == 0)

		return 0;



	ret = skb_cow(skb, 2);

	if (ret)

		return ret;



	skb_push(skb, 2);

	memmove(skb->data, skb->data + 2, len);



	skb->data[len] = 0;

	skb->data[len + 1] = 0;

	return 0;

}