drivers/net/wireless/mediatek/mt76/mt792x_usb.c - linux - Git at Google

 // SPDX-License-Identifier: ISC
 /* Copyright (C) 2023 MediaTek Inc.
  *
  * Author: Lorenzo Bianconi <lorenzo@kernel.org>
  */

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

 #include "mt792x.h"
 #include "mt76_connac2_mac.h"

 u32 mt792xu_rr(struct mt76_dev *dev, u32 addr)
 {
 	u32 ret;

 	mutex_lock(&dev->usb.usb_ctrl_mtx);
 	ret = ___mt76u_rr(dev, MT_VEND_READ_EXT,
 			  USB_DIR_IN | MT_USB_TYPE_VENDOR, addr);
 	mutex_unlock(&dev->usb.usb_ctrl_mtx);

 	return ret;
 }
 EXPORT_SYMBOL_GPL(mt792xu_rr);

 void mt792xu_wr(struct mt76_dev *dev, u32 addr, u32 val)
 {
 	mutex_lock(&dev->usb.usb_ctrl_mtx);
 	___mt76u_wr(dev, MT_VEND_WRITE_EXT,
 		    USB_DIR_OUT | MT_USB_TYPE_VENDOR, addr, val);
 	mutex_unlock(&dev->usb.usb_ctrl_mtx);
 }
 EXPORT_SYMBOL_GPL(mt792xu_wr);

 u32 mt792xu_rmw(struct mt76_dev *dev, u32 addr, u32 mask, u32 val)
 {
 	mutex_lock(&dev->usb.usb_ctrl_mtx);
 	val |= ___mt76u_rr(dev, MT_VEND_READ_EXT,
 			   USB_DIR_IN | MT_USB_TYPE_VENDOR, addr) & ~mask;
 	___mt76u_wr(dev, MT_VEND_WRITE_EXT,
 		    USB_DIR_OUT | MT_USB_TYPE_VENDOR, addr, val);
 	mutex_unlock(&dev->usb.usb_ctrl_mtx);

 	return val;
 }
 EXPORT_SYMBOL_GPL(mt792xu_rmw);

 void mt792xu_copy(struct mt76_dev *dev, u32 offset, const void *data, int len)
 {
 	struct mt76_usb *usb = &dev->usb;
 	int ret, i = 0, batch_len;
 	const u8 *val = data;

 	len = round_up(len, 4);

 	mutex_lock(&usb->usb_ctrl_mtx);
 	while (i < len) {
 		batch_len = min_t(int, usb->data_len, len - i);
 		memcpy(usb->data, val + i, batch_len);
 		ret = __mt76u_vendor_request(dev, MT_VEND_WRITE_EXT,
 					     USB_DIR_OUT | MT_USB_TYPE_VENDOR,
 					     (offset + i) >> 16, offset + i,
 					     usb->data, batch_len);
 		if (ret < 0)
 			break;

 		i += batch_len;
 	}
 	mutex_unlock(&usb->usb_ctrl_mtx);
 }
 EXPORT_SYMBOL_GPL(mt792xu_copy);

 int mt792xu_mcu_power_on(struct mt792x_dev *dev)
 {
 	int ret;

 	ret = mt76u_vendor_request(&dev->mt76, MT_VEND_POWER_ON,
 				   USB_DIR_OUT | MT_USB_TYPE_VENDOR,
 				   0x0, 0x1, NULL, 0);
 	if (ret)
 		return ret;

 	if (!mt76_poll_msec(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_PWR_ON,
 			    MT_TOP_MISC2_FW_PWR_ON, 500)) {
 		dev_err(dev->mt76.dev, "Timeout for power on\n");
 		ret = -EIO;
 	}

 	return ret;
 }
 EXPORT_SYMBOL_GPL(mt792xu_mcu_power_on);

 static void mt792xu_cleanup(struct mt792x_dev *dev)
 {
 	clear_bit(MT76_STATE_INITIALIZED, &dev->mphy.state);
 	mt792xu_wfsys_reset(dev);
 	skb_queue_purge(&dev->mt76.mcu.res_q);
 	mt76u_queues_deinit(&dev->mt76);
 }

 static u32 mt792xu_uhw_rr(struct mt76_dev *dev, u32 addr)
 {
 	u32 ret;

 	mutex_lock(&dev->usb.usb_ctrl_mtx);
 	ret = ___mt76u_rr(dev, MT_VEND_DEV_MODE,
 			  USB_DIR_IN | MT_USB_TYPE_UHW_VENDOR, addr);
 	mutex_unlock(&dev->usb.usb_ctrl_mtx);

 	return ret;
 }

 static void mt792xu_uhw_wr(struct mt76_dev *dev, u32 addr, u32 val)
 {
 	mutex_lock(&dev->usb.usb_ctrl_mtx);
 	___mt76u_wr(dev, MT_VEND_WRITE,
 		    USB_DIR_OUT | MT_USB_TYPE_UHW_VENDOR, addr, val);
 	mutex_unlock(&dev->usb.usb_ctrl_mtx);
 }

 static void mt792xu_dma_prefetch(struct mt792x_dev *dev)
 {
 #define DMA_PREFETCH_CONF(_idx_, _cnt_, _base_) \
 	mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL((_idx_)), \
 		 MT_WPDMA0_MAX_CNT_MASK | MT_WPDMA0_BASE_PTR_MASK, \
 		 FIELD_PREP(MT_WPDMA0_MAX_CNT_MASK, (_cnt_)) | \
 		 FIELD_PREP(MT_WPDMA0_BASE_PTR_MASK, (_base_)))

 	DMA_PREFETCH_CONF(0, 4, 0x080);
 	DMA_PREFETCH_CONF(1, 4, 0x0c0);
 	DMA_PREFETCH_CONF(2, 4, 0x100);
 	DMA_PREFETCH_CONF(3, 4, 0x140);
 	DMA_PREFETCH_CONF(4, 4, 0x180);
 	DMA_PREFETCH_CONF(16, 4, 0x280);
 	DMA_PREFETCH_CONF(17, 4, 0x2c0);
 }

 static void mt792xu_wfdma_init(struct mt792x_dev *dev)
 {
 	int i;

 	mt792xu_dma_prefetch(dev);

 	mt76_clear(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_OMIT_RX_INFO);
 	mt76_set(dev, MT_UWFDMA0_GLO_CFG,
 		 MT_WFDMA0_GLO_CFG_OMIT_TX_INFO |
 		 MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2 |
 		 MT_WFDMA0_GLO_CFG_FW_DWLD_BYPASS_DMASHDL |
 		 MT_WFDMA0_GLO_CFG_TX_DMA_EN |
 		 MT_WFDMA0_GLO_CFG_RX_DMA_EN);

 	mt76_rmw(dev, MT_DMASHDL_REFILL, MT_DMASHDL_REFILL_MASK, 0xffe00000);
 	mt76_clear(dev, MT_DMASHDL_PAGE, MT_DMASHDL_GROUP_SEQ_ORDER);
 	mt76_rmw(dev, MT_DMASHDL_PKT_MAX_SIZE,
 		 MT_DMASHDL_PKT_MAX_SIZE_PLE | MT_DMASHDL_PKT_MAX_SIZE_PSE,
 		 FIELD_PREP(MT_DMASHDL_PKT_MAX_SIZE_PLE, 1) |
 		 FIELD_PREP(MT_DMASHDL_PKT_MAX_SIZE_PSE, 0));
 	for (i = 0; i < 5; i++)
 		mt76_wr(dev, MT_DMASHDL_GROUP_QUOTA(i),
 			FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MIN, 0x3) |
 			FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MAX, 0xfff));
 	for (i = 5; i < 16; i++)
 		mt76_wr(dev, MT_DMASHDL_GROUP_QUOTA(i),
 			FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MIN, 0x0) |
 			FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MAX, 0x0));
 	mt76_wr(dev, MT_DMASHDL_Q_MAP(0), 0x32013201);
 	mt76_wr(dev, MT_DMASHDL_Q_MAP(1), 0x32013201);
 	mt76_wr(dev, MT_DMASHDL_Q_MAP(2), 0x55555444);
 	mt76_wr(dev, MT_DMASHDL_Q_MAP(3), 0x55555444);

 	mt76_wr(dev, MT_DMASHDL_SCHED_SET(0), 0x76540132);
 	mt76_wr(dev, MT_DMASHDL_SCHED_SET(1), 0xFEDCBA98);

 	mt76_set(dev, MT_WFDMA_DUMMY_CR, MT_WFDMA_NEED_REINIT);
 }

 static int mt792xu_dma_rx_evt_ep4(struct mt792x_dev *dev)
 {
 	if (!mt76_poll(dev, MT_UWFDMA0_GLO_CFG,
 		       MT_WFDMA0_GLO_CFG_RX_DMA_BUSY, 0, 1000))
 		return -ETIMEDOUT;

 	mt76_clear(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_RX_DMA_EN);
 	mt76_set(dev, MT_WFDMA_HOST_CONFIG,
 		 MT_WFDMA_HOST_CONFIG_USB_RXEVT_EP4_EN);
 	mt76_set(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_RX_DMA_EN);

 	return 0;
 }

 static void mt792xu_epctl_rst_opt(struct mt792x_dev *dev, bool reset)
 {
 	u32 val;

 	/* usb endpoint reset opt
 	 * bits[4,9]: out blk ep 4-9
 	 * bits[20,21]: in blk ep 4-5
 	 * bits[22]: in int ep 6
 	 */
 	val = mt792xu_uhw_rr(&dev->mt76, MT_SSUSB_EPCTL_CSR_EP_RST_OPT);
 	if (reset)
 		val |= GENMASK(9, 4) | GENMASK(22, 20);
 	else
 		val &= ~(GENMASK(9, 4) | GENMASK(22, 20));
 	mt792xu_uhw_wr(&dev->mt76, MT_SSUSB_EPCTL_CSR_EP_RST_OPT, val);
 }

 int mt792xu_dma_init(struct mt792x_dev *dev, bool resume)
 {
 	int err;

 	mt792xu_wfdma_init(dev);

 	mt76_clear(dev, MT_UDMA_WLCFG_0, MT_WL_RX_FLUSH);

 	mt76_set(dev, MT_UDMA_WLCFG_0,
 		 MT_WL_RX_EN | MT_WL_TX_EN |
 		 MT_WL_RX_MPSZ_PAD0 | MT_TICK_1US_EN);
 	mt76_clear(dev, MT_UDMA_WLCFG_0,
 		   MT_WL_RX_AGG_TO | MT_WL_RX_AGG_LMT);
 	mt76_clear(dev, MT_UDMA_WLCFG_1, MT_WL_RX_AGG_PKT_LMT);

 	if (resume)
 		return 0;

 	err = mt792xu_dma_rx_evt_ep4(dev);
 	if (err)
 		return err;

 	mt792xu_epctl_rst_opt(dev, false);

 	return 0;
 }
 EXPORT_SYMBOL_GPL(mt792xu_dma_init);

 int mt792xu_wfsys_reset(struct mt792x_dev *dev)
 {
 	u32 val;
 	int i;

 	mt792xu_epctl_rst_opt(dev, false);

 	val = mt792xu_uhw_rr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST);
 	val |= MT_CBTOP_RGU_WF_SUBSYS_RST_WF_WHOLE_PATH;
 	mt792xu_uhw_wr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST, val);

 	usleep_range(10, 20);

 	val = mt792xu_uhw_rr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST);
 	val &= ~MT_CBTOP_RGU_WF_SUBSYS_RST_WF_WHOLE_PATH;
 	mt792xu_uhw_wr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST, val);

 	mt792xu_uhw_wr(&dev->mt76, MT_UDMA_CONN_INFRA_STATUS_SEL, 0);
 	for (i = 0; i < MT792x_WFSYS_INIT_RETRY_COUNT; i++) {
 		val = mt792xu_uhw_rr(&dev->mt76, MT_UDMA_CONN_INFRA_STATUS);
 		if (val & MT_UDMA_CONN_WFSYS_INIT_DONE)
 			break;

 		msleep(100);
 	}

 	if (i == MT792x_WFSYS_INIT_RETRY_COUNT)
 		return -ETIMEDOUT;

 	return 0;
 }
 EXPORT_SYMBOL_GPL(mt792xu_wfsys_reset);

 int mt792xu_init_reset(struct mt792x_dev *dev)
 {
 	set_bit(MT76_RESET, &dev->mphy.state);

 	wake_up(&dev->mt76.mcu.wait);
 	skb_queue_purge(&dev->mt76.mcu.res_q);

 	mt76u_stop_rx(&dev->mt76);
 	mt76u_stop_tx(&dev->mt76);

 	mt792xu_wfsys_reset(dev);

 	clear_bit(MT76_RESET, &dev->mphy.state);

 	return mt76u_resume_rx(&dev->mt76);
 }
 EXPORT_SYMBOL_GPL(mt792xu_init_reset);

 void mt792xu_stop(struct ieee80211_hw *hw)
 {
 	struct mt792x_dev *dev = mt792x_hw_dev(hw);

 	mt76u_stop_tx(&dev->mt76);
 	mt792x_stop(hw);
 }
 EXPORT_SYMBOL_GPL(mt792xu_stop);

 void mt792xu_disconnect(struct usb_interface *usb_intf)
 {
 	struct mt792x_dev *dev = usb_get_intfdata(usb_intf);

 	cancel_work_sync(&dev->init_work);
 	if (!test_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
 		return;

 	mt76_unregister_device(&dev->mt76);
 	mt792xu_cleanup(dev);

 	usb_set_intfdata(usb_intf, NULL);
 	usb_put_dev(interface_to_usbdev(usb_intf));

 	mt76_free_device(&dev->mt76);
 }
 EXPORT_SYMBOL_GPL(mt792xu_disconnect);

 MODULE_DESCRIPTION("MediaTek MT792x USB helpers");
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");
	// SPDX-License-Identifier: ISC
	/* Copyright (C) 2023 MediaTek Inc.
	*
	* Author: Lorenzo Bianconi <lorenzo@kernel.org>
	*/

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

	#include "mt792x.h"
	#include "mt76_connac2_mac.h"

	u32 mt792xu_rr(struct mt76_dev *dev, u32 addr)
	{
	u32 ret;

	mutex_lock(&dev->usb.usb_ctrl_mtx);
	ret = ___mt76u_rr(dev, MT_VEND_READ_EXT,
	USB_DIR_IN \| MT_USB_TYPE_VENDOR, addr);
	mutex_unlock(&dev->usb.usb_ctrl_mtx);

	return ret;
	}
	EXPORT_SYMBOL_GPL(mt792xu_rr);

	void mt792xu_wr(struct mt76_dev *dev, u32 addr, u32 val)
	{
	mutex_lock(&dev->usb.usb_ctrl_mtx);
	___mt76u_wr(dev, MT_VEND_WRITE_EXT,
	USB_DIR_OUT \| MT_USB_TYPE_VENDOR, addr, val);
	mutex_unlock(&dev->usb.usb_ctrl_mtx);
	}
	EXPORT_SYMBOL_GPL(mt792xu_wr);

	u32 mt792xu_rmw(struct mt76_dev *dev, u32 addr, u32 mask, u32 val)
	{
	mutex_lock(&dev->usb.usb_ctrl_mtx);
	val \|= ___mt76u_rr(dev, MT_VEND_READ_EXT,
	USB_DIR_IN \| MT_USB_TYPE_VENDOR, addr) & ~mask;
	___mt76u_wr(dev, MT_VEND_WRITE_EXT,
	USB_DIR_OUT \| MT_USB_TYPE_VENDOR, addr, val);
	mutex_unlock(&dev->usb.usb_ctrl_mtx);

	return val;
	}
	EXPORT_SYMBOL_GPL(mt792xu_rmw);

	void mt792xu_copy(struct mt76_dev dev, u32 offset, const void data, int len)
	{
	struct mt76_usb *usb = &dev->usb;
	int ret, i = 0, batch_len;
	const u8 *val = data;

	len = round_up(len, 4);

	mutex_lock(&usb->usb_ctrl_mtx);
	while (i < len) {
	batch_len = min_t(int, usb->data_len, len - i);
	memcpy(usb->data, val + i, batch_len);
	ret = __mt76u_vendor_request(dev, MT_VEND_WRITE_EXT,
	USB_DIR_OUT \| MT_USB_TYPE_VENDOR,
	(offset + i) >> 16, offset + i,
	usb->data, batch_len);
	if (ret < 0)
	break;

	i += batch_len;
	}
	mutex_unlock(&usb->usb_ctrl_mtx);
	}
	EXPORT_SYMBOL_GPL(mt792xu_copy);

	int mt792xu_mcu_power_on(struct mt792x_dev *dev)
	{
	int ret;

	ret = mt76u_vendor_request(&dev->mt76, MT_VEND_POWER_ON,
	USB_DIR_OUT \| MT_USB_TYPE_VENDOR,
	0x0, 0x1, NULL, 0);
	if (ret)
	return ret;

	if (!mt76_poll_msec(dev, MT_CONN_ON_MISC, MT_TOP_MISC2_FW_PWR_ON,
	MT_TOP_MISC2_FW_PWR_ON, 500)) {
	dev_err(dev->mt76.dev, "Timeout for power on\n");
	ret = -EIO;
	}

	return ret;
	}
	EXPORT_SYMBOL_GPL(mt792xu_mcu_power_on);

	static void mt792xu_cleanup(struct mt792x_dev *dev)
	{
	clear_bit(MT76_STATE_INITIALIZED, &dev->mphy.state);
	mt792xu_wfsys_reset(dev);
	skb_queue_purge(&dev->mt76.mcu.res_q);
	mt76u_queues_deinit(&dev->mt76);
	}

	static u32 mt792xu_uhw_rr(struct mt76_dev *dev, u32 addr)
	{
	u32 ret;

	mutex_lock(&dev->usb.usb_ctrl_mtx);
	ret = ___mt76u_rr(dev, MT_VEND_DEV_MODE,
	USB_DIR_IN \| MT_USB_TYPE_UHW_VENDOR, addr);
	mutex_unlock(&dev->usb.usb_ctrl_mtx);

	return ret;
	}

	static void mt792xu_uhw_wr(struct mt76_dev *dev, u32 addr, u32 val)
	{
	mutex_lock(&dev->usb.usb_ctrl_mtx);
	___mt76u_wr(dev, MT_VEND_WRITE,
	USB_DIR_OUT \| MT_USB_TYPE_UHW_VENDOR, addr, val);
	mutex_unlock(&dev->usb.usb_ctrl_mtx);
	}

	static void mt792xu_dma_prefetch(struct mt792x_dev *dev)
	{
	#define DMA_PREFETCH_CONF(_idx_, _cnt_, _base_) \
	mt76_rmw(dev, MT_UWFDMA0_TX_RING_EXT_CTRL((_idx_)), \
	MT_WPDMA0_MAX_CNT_MASK \| MT_WPDMA0_BASE_PTR_MASK, \
	FIELD_PREP(MT_WPDMA0_MAX_CNT_MASK, (_cnt_)) \| \
	FIELD_PREP(MT_WPDMA0_BASE_PTR_MASK, (_base_)))

	DMA_PREFETCH_CONF(0, 4, 0x080);
	DMA_PREFETCH_CONF(1, 4, 0x0c0);
	DMA_PREFETCH_CONF(2, 4, 0x100);
	DMA_PREFETCH_CONF(3, 4, 0x140);
	DMA_PREFETCH_CONF(4, 4, 0x180);
	DMA_PREFETCH_CONF(16, 4, 0x280);
	DMA_PREFETCH_CONF(17, 4, 0x2c0);
	}

	static void mt792xu_wfdma_init(struct mt792x_dev *dev)
	{
	int i;

	mt792xu_dma_prefetch(dev);

	mt76_clear(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_OMIT_RX_INFO);
	mt76_set(dev, MT_UWFDMA0_GLO_CFG,
	MT_WFDMA0_GLO_CFG_OMIT_TX_INFO \|
	MT_WFDMA0_GLO_CFG_OMIT_RX_INFO_PFET2 \|
	MT_WFDMA0_GLO_CFG_FW_DWLD_BYPASS_DMASHDL \|
	MT_WFDMA0_GLO_CFG_TX_DMA_EN \|
	MT_WFDMA0_GLO_CFG_RX_DMA_EN);

	mt76_rmw(dev, MT_DMASHDL_REFILL, MT_DMASHDL_REFILL_MASK, 0xffe00000);
	mt76_clear(dev, MT_DMASHDL_PAGE, MT_DMASHDL_GROUP_SEQ_ORDER);
	mt76_rmw(dev, MT_DMASHDL_PKT_MAX_SIZE,
	MT_DMASHDL_PKT_MAX_SIZE_PLE \| MT_DMASHDL_PKT_MAX_SIZE_PSE,
	FIELD_PREP(MT_DMASHDL_PKT_MAX_SIZE_PLE, 1) \|
	FIELD_PREP(MT_DMASHDL_PKT_MAX_SIZE_PSE, 0));
	for (i = 0; i < 5; i++)
	mt76_wr(dev, MT_DMASHDL_GROUP_QUOTA(i),
	FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MIN, 0x3) \|
	FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MAX, 0xfff));
	for (i = 5; i < 16; i++)
	mt76_wr(dev, MT_DMASHDL_GROUP_QUOTA(i),
	FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MIN, 0x0) \|
	FIELD_PREP(MT_DMASHDL_GROUP_QUOTA_MAX, 0x0));
	mt76_wr(dev, MT_DMASHDL_Q_MAP(0), 0x32013201);
	mt76_wr(dev, MT_DMASHDL_Q_MAP(1), 0x32013201);
	mt76_wr(dev, MT_DMASHDL_Q_MAP(2), 0x55555444);
	mt76_wr(dev, MT_DMASHDL_Q_MAP(3), 0x55555444);

	mt76_wr(dev, MT_DMASHDL_SCHED_SET(0), 0x76540132);
	mt76_wr(dev, MT_DMASHDL_SCHED_SET(1), 0xFEDCBA98);

	mt76_set(dev, MT_WFDMA_DUMMY_CR, MT_WFDMA_NEED_REINIT);
	}

	static int mt792xu_dma_rx_evt_ep4(struct mt792x_dev *dev)
	{
	if (!mt76_poll(dev, MT_UWFDMA0_GLO_CFG,
	MT_WFDMA0_GLO_CFG_RX_DMA_BUSY, 0, 1000))
	return -ETIMEDOUT;

	mt76_clear(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_RX_DMA_EN);
	mt76_set(dev, MT_WFDMA_HOST_CONFIG,
	MT_WFDMA_HOST_CONFIG_USB_RXEVT_EP4_EN);
	mt76_set(dev, MT_UWFDMA0_GLO_CFG, MT_WFDMA0_GLO_CFG_RX_DMA_EN);

	return 0;
	}

	static void mt792xu_epctl_rst_opt(struct mt792x_dev *dev, bool reset)
	{
	u32 val;

	/* usb endpoint reset opt
	* bits[4,9]: out blk ep 4-9
	* bits[20,21]: in blk ep 4-5
	* bits[22]: in int ep 6
	*/
	val = mt792xu_uhw_rr(&dev->mt76, MT_SSUSB_EPCTL_CSR_EP_RST_OPT);
	if (reset)
	val \|= GENMASK(9, 4) \| GENMASK(22, 20);
	else
	val &= ~(GENMASK(9, 4) \| GENMASK(22, 20));
	mt792xu_uhw_wr(&dev->mt76, MT_SSUSB_EPCTL_CSR_EP_RST_OPT, val);
	}

	int mt792xu_dma_init(struct mt792x_dev *dev, bool resume)
	{
	int err;

	mt792xu_wfdma_init(dev);

	mt76_clear(dev, MT_UDMA_WLCFG_0, MT_WL_RX_FLUSH);

	mt76_set(dev, MT_UDMA_WLCFG_0,
	MT_WL_RX_EN \| MT_WL_TX_EN \|
	MT_WL_RX_MPSZ_PAD0 \| MT_TICK_1US_EN);
	mt76_clear(dev, MT_UDMA_WLCFG_0,
	MT_WL_RX_AGG_TO \| MT_WL_RX_AGG_LMT);
	mt76_clear(dev, MT_UDMA_WLCFG_1, MT_WL_RX_AGG_PKT_LMT);

	if (resume)
	return 0;

	err = mt792xu_dma_rx_evt_ep4(dev);
	if (err)
	return err;

	mt792xu_epctl_rst_opt(dev, false);

	return 0;
	}
	EXPORT_SYMBOL_GPL(mt792xu_dma_init);

	int mt792xu_wfsys_reset(struct mt792x_dev *dev)
	{
	u32 val;
	int i;

	mt792xu_epctl_rst_opt(dev, false);

	val = mt792xu_uhw_rr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST);
	val \|= MT_CBTOP_RGU_WF_SUBSYS_RST_WF_WHOLE_PATH;
	mt792xu_uhw_wr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST, val);

	usleep_range(10, 20);

	val = mt792xu_uhw_rr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST);
	val &= ~MT_CBTOP_RGU_WF_SUBSYS_RST_WF_WHOLE_PATH;
	mt792xu_uhw_wr(&dev->mt76, MT_CBTOP_RGU_WF_SUBSYS_RST, val);

	mt792xu_uhw_wr(&dev->mt76, MT_UDMA_CONN_INFRA_STATUS_SEL, 0);
	for (i = 0; i < MT792x_WFSYS_INIT_RETRY_COUNT; i++) {
	val = mt792xu_uhw_rr(&dev->mt76, MT_UDMA_CONN_INFRA_STATUS);
	if (val & MT_UDMA_CONN_WFSYS_INIT_DONE)
	break;

	msleep(100);
	}

	if (i == MT792x_WFSYS_INIT_RETRY_COUNT)
	return -ETIMEDOUT;

	return 0;
	}
	EXPORT_SYMBOL_GPL(mt792xu_wfsys_reset);

	int mt792xu_init_reset(struct mt792x_dev *dev)
	{
	set_bit(MT76_RESET, &dev->mphy.state);

	wake_up(&dev->mt76.mcu.wait);
	skb_queue_purge(&dev->mt76.mcu.res_q);

	mt76u_stop_rx(&dev->mt76);
	mt76u_stop_tx(&dev->mt76);

	mt792xu_wfsys_reset(dev);

	clear_bit(MT76_RESET, &dev->mphy.state);

	return mt76u_resume_rx(&dev->mt76);
	}
	EXPORT_SYMBOL_GPL(mt792xu_init_reset);

	void mt792xu_stop(struct ieee80211_hw *hw)
	{
	struct mt792x_dev *dev = mt792x_hw_dev(hw);

	mt76u_stop_tx(&dev->mt76);
	mt792x_stop(hw);
	}
	EXPORT_SYMBOL_GPL(mt792xu_stop);

	void mt792xu_disconnect(struct usb_interface *usb_intf)
	{
	struct mt792x_dev *dev = usb_get_intfdata(usb_intf);

	cancel_work_sync(&dev->init_work);
	if (!test_bit(MT76_STATE_INITIALIZED, &dev->mphy.state))
	return;

	mt76_unregister_device(&dev->mt76);
	mt792xu_cleanup(dev);

	usb_set_intfdata(usb_intf, NULL);
	usb_put_dev(interface_to_usbdev(usb_intf));

	mt76_free_device(&dev->mt76);
	}
	EXPORT_SYMBOL_GPL(mt792xu_disconnect);

	MODULE_DESCRIPTION("MediaTek MT792x USB helpers");
	MODULE_LICENSE("Dual BSD/GPL");
	MODULE_AUTHOR("Lorenzo Bianconi <lorenzo@kernel.org>");