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

Source file repositories/reference/linux-study-clean/drivers/net/wireless/mediatek/mt76/mt76x0/usb.c

File Facts

System
Linux kernel
Corpus path
drivers/net/wireless/mediatek/mt76/mt76x0/usb.c
Extension
.c
Size
9611 bytes
Lines
357
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2015 Jakub Kicinski <kubakici@wp.pl>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/usb.h>

#include "mt76x0.h"
#include "mcu.h"
#include "../mt76x02_usb.h"

static struct usb_device_id mt76x0_device_table[] = {
	{ USB_DEVICE(0x148F, 0x7610) },	/* MT7610U */
	{ USB_DEVICE(0x13B1, 0x003E) },	/* Linksys AE6000 */
	{ USB_DEVICE(0x0E8D, 0x7610) },	/* Sabrent NTWLAC */
	{ USB_DEVICE(0x7392, 0xa711) },	/* Edimax 7711mac */
	{ USB_DEVICE(0x7392, 0xb711) },	/* Edimax / Elecom  */
	{ USB_DEVICE(0x148f, 0x761a) },	/* TP-Link TL-WDN5200 */
	{ USB_DEVICE(0x148f, 0x760a) },	/* TP-Link unknown */
	{ USB_DEVICE(0x0b05, 0x17d1) },	/* Asus USB-AC51 */
	{ USB_DEVICE(0x0b05, 0x17db) },	/* Asus USB-AC50 */
	{ USB_DEVICE(0x0df6, 0x0075) },	/* Sitecom WLA-3100 */
	{ USB_DEVICE(0x2019, 0xab31) },	/* Planex GW-450D */
	{ USB_DEVICE(0x2001, 0x3d02) },	/* D-LINK DWA-171 rev B1 */
	{ USB_DEVICE(0x0586, 0x3425) },	/* Zyxel NWD6505 */
	{ USB_DEVICE(0x07b8, 0x7610) },	/* AboCom AU7212 */
	{ USB_DEVICE(0x04bb, 0x0951) },	/* I-O DATA WN-AC433UK */
	{ USB_DEVICE(0x057c, 0x8502) },	/* AVM FRITZ!WLAN USB Stick AC 430 */
	{ USB_DEVICE(0x293c, 0x5702) },	/* Comcast Xfinity KXW02AAA  */
	{ USB_DEVICE(0x20f4, 0x806b) },	/* TRENDnet TEW-806UBH  */
	{ USB_DEVICE(0x7392, 0xc711) }, /* Devolo Wifi ac Stick */
	{ USB_DEVICE(0x0df6, 0x0079) }, /* Sitecom Europe B.V. ac  Stick */
	{ USB_DEVICE(0x2357, 0x0123) }, /* TP-LINK T2UHP_US_v1 */
	{ USB_DEVICE(0x2357, 0x010b) }, /* TP-LINK T2UHP_UN_v1 */
	/* TP-LINK Archer T1U */
	{ USB_DEVICE(0x2357, 0x0105), .driver_info = 1, },
	/* MT7630U */
	{ USB_DEVICE_AND_INTERFACE_INFO(0x0E8D, 0x7630, 0xff, 0x2, 0xff)},
	/* MT7650U */
	{ USB_DEVICE_AND_INTERFACE_INFO(0x0E8D, 0x7650, 0xff, 0x2, 0xff)},
	{ 0, }
};

static void mt76x0_init_usb_dma(struct mt76x02_dev *dev)
{
	u32 val;

	val = mt76_rr(dev, MT_USB_DMA_CFG);

	val |= MT_USB_DMA_CFG_RX_BULK_EN |
	       MT_USB_DMA_CFG_TX_BULK_EN;

	/* disable AGGR_BULK_RX in order to receive one
	 * frame in each rx urb and avoid copies
	 */
	val &= ~MT_USB_DMA_CFG_RX_BULK_AGG_EN;
	mt76_wr(dev, MT_USB_DMA_CFG, val);

	val = mt76_rr(dev, MT_COM_REG0);
	if (val & 1)
		dev_dbg(dev->mt76.dev, "MCU not ready\n");

	val = mt76_rr(dev, MT_USB_DMA_CFG);

	val |= MT_USB_DMA_CFG_RX_DROP_OR_PAD;
	mt76_wr(dev, MT_USB_DMA_CFG, val);
	val &= ~MT_USB_DMA_CFG_RX_DROP_OR_PAD;
	mt76_wr(dev, MT_USB_DMA_CFG, val);
}

static void mt76x0u_cleanup(struct mt76x02_dev *dev)
{
	clear_bit(MT76_STATE_INITIALIZED, &dev->mphy.state);
	mt76x0_chip_onoff(dev, false, false);
	mt76u_queues_deinit(&dev->mt76);
}

static void mt76x0u_stop(struct ieee80211_hw *hw, bool suspend)
{
	struct mt76x02_dev *dev = hw->priv;

	clear_bit(MT76_STATE_RUNNING, &dev->mphy.state);
	cancel_delayed_work_sync(&dev->cal_work);
	cancel_delayed_work_sync(&dev->mphy.mac_work);
	mt76u_stop_tx(&dev->mt76);
	mt76x02u_exit_beacon_config(dev);

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

Annotation

Implementation Notes