drivers/net/wireless/mediatek/mt7601u/usb.c - kernel/quantenna - Git at Google

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

 #include "mt7601u.h"
 #include "usb.h"
 #include "trace.h"

 static struct usb_device_id mt7601u_device_table[] = {
 	{ USB_DEVICE(0x0b05, 0x17d3) },
 	{ USB_DEVICE(0x0e8d, 0x760a) },
 	{ USB_DEVICE(0x0e8d, 0x760b) },
 	{ USB_DEVICE(0x13d3, 0x3431) },
 	{ USB_DEVICE(0x13d3, 0x3434) },
 	{ USB_DEVICE(0x148f, 0x7601) },
 	{ USB_DEVICE(0x148f, 0x760a) },
 	{ USB_DEVICE(0x148f, 0x760b) },
 	{ USB_DEVICE(0x148f, 0x760c) },
 	{ USB_DEVICE(0x148f, 0x760d) },
 	{ USB_DEVICE(0x2001, 0x3d04) },
 	{ USB_DEVICE(0x2717, 0x4106) },
 	{ USB_DEVICE(0x2955, 0x0001) },
 	{ USB_DEVICE(0x2955, 0x1001) },
 	{ USB_DEVICE(0x2a5f, 0x1000) },
 	{ USB_DEVICE(0x7392, 0x7710) },
 	{ 0, }
 };

 bool mt7601u_usb_alloc_buf(struct mt7601u_dev *dev, size_t len,
 			   struct mt7601u_dma_buf *buf)
 {
 	struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);

 	buf->len = len;
 	buf->urb = usb_alloc_urb(0, GFP_KERNEL);
 	buf->buf = usb_alloc_coherent(usb_dev, buf->len, GFP_KERNEL, &buf->dma);

 	return !buf->urb || !buf->buf;
 }

 void mt7601u_usb_free_buf(struct mt7601u_dev *dev, struct mt7601u_dma_buf *buf)
 {
 	struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);

 	usb_free_coherent(usb_dev, buf->len, buf->buf, buf->dma);
 	usb_free_urb(buf->urb);
 }

 int mt7601u_usb_submit_buf(struct mt7601u_dev *dev, int dir, int ep_idx,
 			   struct mt7601u_dma_buf *buf, gfp_t gfp,
 			   usb_complete_t complete_fn, void *context)
 {
 	struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);
 	unsigned pipe;
 	int ret;

 	if (dir == USB_DIR_IN)
 		pipe = usb_rcvbulkpipe(usb_dev, dev->in_eps[ep_idx]);
 	else
 		pipe = usb_sndbulkpipe(usb_dev, dev->out_eps[ep_idx]);

 	usb_fill_bulk_urb(buf->urb, usb_dev, pipe, buf->buf, buf->len,
 			  complete_fn, context);
 	buf->urb->transfer_dma = buf->dma;
 	buf->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;

 	trace_mt_submit_urb(dev, buf->urb);
 	ret = usb_submit_urb(buf->urb, gfp);
 	if (ret)
 		dev_err(dev->dev, "Error: submit URB dir:%d ep:%d failed:%d\n",
 			dir, ep_idx, ret);
 	return ret;
 }

 void mt7601u_complete_urb(struct urb *urb)
 {
 	struct completion *cmpl = urb->context;

 	complete(cmpl);
 }

 int mt7601u_vendor_request(struct mt7601u_dev *dev, const u8 req,
 			   const u8 direction, const u16 val, const u16 offset,
 			   void *buf, const size_t buflen)
 {
 	int i, ret;
 	struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);
 	const u8 req_type = direction | USB_TYPE_VENDOR | USB_RECIP_DEVICE;
 	const unsigned int pipe = (direction == USB_DIR_IN) ?
 		usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0);

 	for (i = 0; i < MT_VEND_REQ_MAX_RETRY; i++) {
 		ret = usb_control_msg(usb_dev, pipe, req, req_type,
 				      val, offset, buf, buflen,
 				      MT_VEND_REQ_TOUT_MS);
 		trace_mt_vend_req(dev, pipe, req, req_type, val, offset,
 				  buf, buflen, ret);

 		if (ret == -ENODEV)
 			set_bit(MT7601U_STATE_REMOVED, &dev->state);
 		if (ret >= 0 || ret == -ENODEV)
 			return ret;

 		msleep(5);
 	}

 	dev_err(dev->dev, "Vendor request req:%02x off:%04x failed:%d\n",
 		req, offset, ret);

 	return ret;
 }

 void mt7601u_vendor_reset(struct mt7601u_dev *dev)
 {
 	mt7601u_vendor_request(dev, MT_VEND_DEV_MODE, USB_DIR_OUT,
 			       MT_VEND_DEV_MODE_RESET, 0, NULL, 0);
 }

 u32 mt7601u_rr(struct mt7601u_dev *dev, u32 offset)
 {
 	int ret;
 	u32 val = ~0;

 	WARN_ONCE(offset > USHRT_MAX, "read high off:%08x", offset);

 	mutex_lock(&dev->vendor_req_mutex);

 	ret = mt7601u_vendor_request(dev, MT_VEND_MULTI_READ, USB_DIR_IN,
 				     0, offset, dev->vend_buf, MT_VEND_BUF);
 	if (ret == MT_VEND_BUF)
 		val = get_unaligned_le32(dev->vend_buf);
 	else if (ret > 0)
 		dev_err(dev->dev, "Error: wrong size read:%d off:%08x\n",
 			ret, offset);

 	mutex_unlock(&dev->vendor_req_mutex);

 	trace_reg_read(dev, offset, val);
 	return val;
 }

 int mt7601u_vendor_single_wr(struct mt7601u_dev *dev, const u8 req,
 			     const u16 offset, const u32 val)
 {
 	int ret;

 	mutex_lock(&dev->vendor_req_mutex);

 	ret = mt7601u_vendor_request(dev, req, USB_DIR_OUT,
 				     val & 0xffff, offset, NULL, 0);
 	if (!ret)
 		ret = mt7601u_vendor_request(dev, req, USB_DIR_OUT,
 					     val >> 16, offset + 2, NULL, 0);

 	mutex_unlock(&dev->vendor_req_mutex);

 	return ret;
 }

 void mt7601u_wr(struct mt7601u_dev *dev, u32 offset, u32 val)
 {
 	WARN_ONCE(offset > USHRT_MAX, "write high off:%08x", offset);

 	mt7601u_vendor_single_wr(dev, MT_VEND_WRITE, offset, val);
 	trace_reg_write(dev, offset, val);
 }

 u32 mt7601u_rmw(struct mt7601u_dev *dev, u32 offset, u32 mask, u32 val)
 {
 	val |= mt7601u_rr(dev, offset) & ~mask;
 	mt7601u_wr(dev, offset, val);
 	return val;
 }

 u32 mt7601u_rmc(struct mt7601u_dev *dev, u32 offset, u32 mask, u32 val)
 {
 	u32 reg = mt7601u_rr(dev, offset);

 	val |= reg & ~mask;
 	if (reg != val)
 		mt7601u_wr(dev, offset, val);
 	return val;
 }

 void mt7601u_wr_copy(struct mt7601u_dev *dev, u32 offset,
 		     const void *data, int len)
 {
 	WARN_ONCE(offset & 3, "unaligned write copy off:%08x", offset);
 	WARN_ONCE(len & 3, "short write copy off:%08x", offset);

 	mt7601u_burst_write_regs(dev, offset, data, len / 4);
 }

 void mt7601u_addr_wr(struct mt7601u_dev *dev, const u32 offset, const u8 *addr)
 {
 	mt7601u_wr(dev, offset, get_unaligned_le32(addr));
 	mt7601u_wr(dev, offset + 4, addr[4] | addr[5] << 8);
 }

 static int mt7601u_assign_pipes(struct usb_interface *usb_intf,
 				struct mt7601u_dev *dev)
 {
 	struct usb_endpoint_descriptor *ep_desc;
 	struct usb_host_interface *intf_desc = usb_intf->cur_altsetting;
 	unsigned i, ep_i = 0, ep_o = 0;

 	BUILD_BUG_ON(sizeof(dev->in_eps) < __MT_EP_IN_MAX);
 	BUILD_BUG_ON(sizeof(dev->out_eps) < __MT_EP_OUT_MAX);

 	for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
 		ep_desc = &intf_desc->endpoint[i].desc;

 		if (usb_endpoint_is_bulk_in(ep_desc) &&
 		    ep_i++ < __MT_EP_IN_MAX) {
 			dev->in_eps[ep_i - 1] = usb_endpoint_num(ep_desc);
 			dev->in_max_packet = usb_endpoint_maxp(ep_desc);
 			/* Note: this is ignored by usb sub-system but vendor
 			 *	 code does it. We can drop this at some point.
 			 */
 			dev->in_eps[ep_i - 1] |= USB_DIR_IN;
 		} else if (usb_endpoint_is_bulk_out(ep_desc) &&
 			   ep_o++ < __MT_EP_OUT_MAX) {
 			dev->out_eps[ep_o - 1] = usb_endpoint_num(ep_desc);
 			dev->out_max_packet = usb_endpoint_maxp(ep_desc);
 		}
 	}

 	if (ep_i != __MT_EP_IN_MAX || ep_o != __MT_EP_OUT_MAX) {
 		dev_err(dev->dev, "Error: wrong pipe number in:%d out:%d\n",
 			ep_i, ep_o);
 		return -EINVAL;
 	}

 	return 0;
 }

 static int mt7601u_probe(struct usb_interface *usb_intf,
 			 const struct usb_device_id *id)
 {
 	struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
 	struct mt7601u_dev *dev;
 	u32 asic_rev, mac_rev;
 	int ret;

 	dev = mt7601u_alloc_device(&usb_intf->dev);
 	if (!dev)
 		return -ENOMEM;

 	usb_dev = usb_get_dev(usb_dev);
 	usb_reset_device(usb_dev);

 	usb_set_intfdata(usb_intf, dev);

 	dev->vend_buf = devm_kmalloc(dev->dev, MT_VEND_BUF, GFP_KERNEL);
 	if (!dev->vend_buf) {
 		ret = -ENOMEM;
 		goto err;
 	}

 	ret = mt7601u_assign_pipes(usb_intf, dev);
 	if (ret)
 		goto err;
 	ret = mt7601u_wait_asic_ready(dev);
 	if (ret)
 		goto err;

 	asic_rev = mt7601u_rr(dev, MT_ASIC_VERSION);
 	mac_rev = mt7601u_rr(dev, MT_MAC_CSR0);
 	dev_info(dev->dev, "ASIC revision: %08x MAC revision: %08x\n",
 		 asic_rev, mac_rev);

 	/* Note: vendor driver skips this check for MT7601U */
 	if (!(mt7601u_rr(dev, MT_EFUSE_CTRL) & MT_EFUSE_CTRL_SEL))
 		dev_warn(dev->dev, "Warning: eFUSE not present\n");

 	ret = mt7601u_init_hardware(dev);
 	if (ret)
 		goto err;
 	ret = mt7601u_register_device(dev);
 	if (ret)
 		goto err_hw;

 	set_bit(MT7601U_STATE_INITIALIZED, &dev->state);

 	return 0;
 err_hw:
 	mt7601u_cleanup(dev);
 err:
 	usb_set_intfdata(usb_intf, NULL);
 	usb_put_dev(interface_to_usbdev(usb_intf));

 	destroy_workqueue(dev->stat_wq);
 	ieee80211_free_hw(dev->hw);
 	return ret;
 }

 static void mt7601u_disconnect(struct usb_interface *usb_intf)
 {
 	struct mt7601u_dev *dev = usb_get_intfdata(usb_intf);

 	ieee80211_unregister_hw(dev->hw);
 	mt7601u_cleanup(dev);

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

 	destroy_workqueue(dev->stat_wq);
 	ieee80211_free_hw(dev->hw);
 }

 static int mt7601u_suspend(struct usb_interface *usb_intf, pm_message_t state)
 {
 	struct mt7601u_dev *dev = usb_get_intfdata(usb_intf);

 	mt7601u_cleanup(dev);

 	return 0;
 }

 static int mt7601u_resume(struct usb_interface *usb_intf)
 {
 	struct mt7601u_dev *dev = usb_get_intfdata(usb_intf);
 	int ret;

 	ret = mt7601u_init_hardware(dev);
 	if (ret)
 		return ret;

 	set_bit(MT7601U_STATE_INITIALIZED, &dev->state);

 	return 0;
 }

 MODULE_DEVICE_TABLE(usb, mt7601u_device_table);
 MODULE_FIRMWARE(MT7601U_FIRMWARE);
 MODULE_LICENSE("GPL");

 static struct usb_driver mt7601u_driver = {
 	.name		= KBUILD_MODNAME,
 	.id_table	= mt7601u_device_table,
 	.probe		= mt7601u_probe,
 	.disconnect	= mt7601u_disconnect,
 	.suspend	= mt7601u_suspend,
 	.resume		= mt7601u_resume,
 	.reset_resume	= mt7601u_resume,
 	.soft_unbind	= 1,
 	.disable_hub_initiated_lpm = 1,
 };
 module_usb_driver(mt7601u_driver);
	/*
	* 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 <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/usb.h>

	#include "mt7601u.h"
	#include "usb.h"
	#include "trace.h"

	static struct usb_device_id mt7601u_device_table[] = {
	{ USB_DEVICE(0x0b05, 0x17d3) },
	{ USB_DEVICE(0x0e8d, 0x760a) },
	{ USB_DEVICE(0x0e8d, 0x760b) },
	{ USB_DEVICE(0x13d3, 0x3431) },
	{ USB_DEVICE(0x13d3, 0x3434) },
	{ USB_DEVICE(0x148f, 0x7601) },
	{ USB_DEVICE(0x148f, 0x760a) },
	{ USB_DEVICE(0x148f, 0x760b) },
	{ USB_DEVICE(0x148f, 0x760c) },
	{ USB_DEVICE(0x148f, 0x760d) },
	{ USB_DEVICE(0x2001, 0x3d04) },
	{ USB_DEVICE(0x2717, 0x4106) },
	{ USB_DEVICE(0x2955, 0x0001) },
	{ USB_DEVICE(0x2955, 0x1001) },
	{ USB_DEVICE(0x2a5f, 0x1000) },
	{ USB_DEVICE(0x7392, 0x7710) },
	{ 0, }
	};

	bool mt7601u_usb_alloc_buf(struct mt7601u_dev *dev, size_t len,
	struct mt7601u_dma_buf *buf)
	{
	struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);

	buf->len = len;
	buf->urb = usb_alloc_urb(0, GFP_KERNEL);
	buf->buf = usb_alloc_coherent(usb_dev, buf->len, GFP_KERNEL, &buf->dma);

	return !buf->urb \|\| !buf->buf;
	}

	void mt7601u_usb_free_buf(struct mt7601u_dev dev, struct mt7601u_dma_buf buf)
	{
	struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);

	usb_free_coherent(usb_dev, buf->len, buf->buf, buf->dma);
	usb_free_urb(buf->urb);
	}

	int mt7601u_usb_submit_buf(struct mt7601u_dev *dev, int dir, int ep_idx,
	struct mt7601u_dma_buf *buf, gfp_t gfp,
	usb_complete_t complete_fn, void *context)
	{
	struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);
	unsigned pipe;
	int ret;

	if (dir == USB_DIR_IN)
	pipe = usb_rcvbulkpipe(usb_dev, dev->in_eps[ep_idx]);
	else
	pipe = usb_sndbulkpipe(usb_dev, dev->out_eps[ep_idx]);

	usb_fill_bulk_urb(buf->urb, usb_dev, pipe, buf->buf, buf->len,
	complete_fn, context);
	buf->urb->transfer_dma = buf->dma;
	buf->urb->transfer_flags \|= URB_NO_TRANSFER_DMA_MAP;

	trace_mt_submit_urb(dev, buf->urb);
	ret = usb_submit_urb(buf->urb, gfp);
	if (ret)
	dev_err(dev->dev, "Error: submit URB dir:%d ep:%d failed:%d\n",
	dir, ep_idx, ret);
	return ret;
	}

	void mt7601u_complete_urb(struct urb *urb)
	{
	struct completion *cmpl = urb->context;

	complete(cmpl);
	}

	int mt7601u_vendor_request(struct mt7601u_dev *dev, const u8 req,
	const u8 direction, const u16 val, const u16 offset,
	void *buf, const size_t buflen)
	{
	int i, ret;
	struct usb_device *usb_dev = mt7601u_to_usb_dev(dev);
	const u8 req_type = direction \| USB_TYPE_VENDOR \| USB_RECIP_DEVICE;
	const unsigned int pipe = (direction == USB_DIR_IN) ?
	usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0);

	for (i = 0; i < MT_VEND_REQ_MAX_RETRY; i++) {
	ret = usb_control_msg(usb_dev, pipe, req, req_type,
	val, offset, buf, buflen,
	MT_VEND_REQ_TOUT_MS);
	trace_mt_vend_req(dev, pipe, req, req_type, val, offset,
	buf, buflen, ret);

	if (ret == -ENODEV)
	set_bit(MT7601U_STATE_REMOVED, &dev->state);
	if (ret >= 0 \|\| ret == -ENODEV)
	return ret;

	msleep(5);
	}

	dev_err(dev->dev, "Vendor request req:%02x off:%04x failed:%d\n",
	req, offset, ret);

	return ret;
	}

	void mt7601u_vendor_reset(struct mt7601u_dev *dev)
	{
	mt7601u_vendor_request(dev, MT_VEND_DEV_MODE, USB_DIR_OUT,
	MT_VEND_DEV_MODE_RESET, 0, NULL, 0);
	}

	u32 mt7601u_rr(struct mt7601u_dev *dev, u32 offset)
	{
	int ret;
	u32 val = ~0;

	WARN_ONCE(offset > USHRT_MAX, "read high off:%08x", offset);

	mutex_lock(&dev->vendor_req_mutex);

	ret = mt7601u_vendor_request(dev, MT_VEND_MULTI_READ, USB_DIR_IN,
	0, offset, dev->vend_buf, MT_VEND_BUF);
	if (ret == MT_VEND_BUF)
	val = get_unaligned_le32(dev->vend_buf);
	else if (ret > 0)
	dev_err(dev->dev, "Error: wrong size read:%d off:%08x\n",
	ret, offset);

	mutex_unlock(&dev->vendor_req_mutex);

	trace_reg_read(dev, offset, val);
	return val;
	}

	int mt7601u_vendor_single_wr(struct mt7601u_dev *dev, const u8 req,
	const u16 offset, const u32 val)
	{
	int ret;

	mutex_lock(&dev->vendor_req_mutex);

	ret = mt7601u_vendor_request(dev, req, USB_DIR_OUT,
	val & 0xffff, offset, NULL, 0);
	if (!ret)
	ret = mt7601u_vendor_request(dev, req, USB_DIR_OUT,
	val >> 16, offset + 2, NULL, 0);

	mutex_unlock(&dev->vendor_req_mutex);

	return ret;
	}

	void mt7601u_wr(struct mt7601u_dev *dev, u32 offset, u32 val)
	{
	WARN_ONCE(offset > USHRT_MAX, "write high off:%08x", offset);

	mt7601u_vendor_single_wr(dev, MT_VEND_WRITE, offset, val);
	trace_reg_write(dev, offset, val);
	}

	u32 mt7601u_rmw(struct mt7601u_dev *dev, u32 offset, u32 mask, u32 val)
	{
	val \|= mt7601u_rr(dev, offset) & ~mask;
	mt7601u_wr(dev, offset, val);
	return val;
	}

	u32 mt7601u_rmc(struct mt7601u_dev *dev, u32 offset, u32 mask, u32 val)
	{
	u32 reg = mt7601u_rr(dev, offset);

	val \|= reg & ~mask;
	if (reg != val)
	mt7601u_wr(dev, offset, val);
	return val;
	}

	void mt7601u_wr_copy(struct mt7601u_dev *dev, u32 offset,
	const void *data, int len)
	{
	WARN_ONCE(offset & 3, "unaligned write copy off:%08x", offset);
	WARN_ONCE(len & 3, "short write copy off:%08x", offset);

	mt7601u_burst_write_regs(dev, offset, data, len / 4);
	}

	void mt7601u_addr_wr(struct mt7601u_dev dev, const u32 offset, const u8 addr)
	{
	mt7601u_wr(dev, offset, get_unaligned_le32(addr));
	mt7601u_wr(dev, offset + 4, addr[4] \| addr[5] << 8);
	}

	static int mt7601u_assign_pipes(struct usb_interface *usb_intf,
	struct mt7601u_dev *dev)
	{
	struct usb_endpoint_descriptor *ep_desc;
	struct usb_host_interface *intf_desc = usb_intf->cur_altsetting;
	unsigned i, ep_i = 0, ep_o = 0;

	BUILD_BUG_ON(sizeof(dev->in_eps) < __MT_EP_IN_MAX);
	BUILD_BUG_ON(sizeof(dev->out_eps) < __MT_EP_OUT_MAX);

	for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
	ep_desc = &intf_desc->endpoint[i].desc;

	if (usb_endpoint_is_bulk_in(ep_desc) &&
	ep_i++ < __MT_EP_IN_MAX) {
	dev->in_eps[ep_i - 1] = usb_endpoint_num(ep_desc);
	dev->in_max_packet = usb_endpoint_maxp(ep_desc);
	/* Note: this is ignored by usb sub-system but vendor
	* code does it. We can drop this at some point.
	*/
	dev->in_eps[ep_i - 1] \|= USB_DIR_IN;
	} else if (usb_endpoint_is_bulk_out(ep_desc) &&
	ep_o++ < __MT_EP_OUT_MAX) {
	dev->out_eps[ep_o - 1] = usb_endpoint_num(ep_desc);
	dev->out_max_packet = usb_endpoint_maxp(ep_desc);
	}
	}

	if (ep_i != __MT_EP_IN_MAX \|\| ep_o != __MT_EP_OUT_MAX) {
	dev_err(dev->dev, "Error: wrong pipe number in:%d out:%d\n",
	ep_i, ep_o);
	return -EINVAL;
	}

	return 0;
	}

	static int mt7601u_probe(struct usb_interface *usb_intf,
	const struct usb_device_id *id)
	{
	struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
	struct mt7601u_dev *dev;
	u32 asic_rev, mac_rev;
	int ret;

	dev = mt7601u_alloc_device(&usb_intf->dev);
	if (!dev)
	return -ENOMEM;

	usb_dev = usb_get_dev(usb_dev);
	usb_reset_device(usb_dev);

	usb_set_intfdata(usb_intf, dev);

	dev->vend_buf = devm_kmalloc(dev->dev, MT_VEND_BUF, GFP_KERNEL);
	if (!dev->vend_buf) {
	ret = -ENOMEM;
	goto err;
	}

	ret = mt7601u_assign_pipes(usb_intf, dev);
	if (ret)
	goto err;
	ret = mt7601u_wait_asic_ready(dev);
	if (ret)
	goto err;

	asic_rev = mt7601u_rr(dev, MT_ASIC_VERSION);
	mac_rev = mt7601u_rr(dev, MT_MAC_CSR0);
	dev_info(dev->dev, "ASIC revision: %08x MAC revision: %08x\n",
	asic_rev, mac_rev);

	/* Note: vendor driver skips this check for MT7601U */
	if (!(mt7601u_rr(dev, MT_EFUSE_CTRL) & MT_EFUSE_CTRL_SEL))
	dev_warn(dev->dev, "Warning: eFUSE not present\n");

	ret = mt7601u_init_hardware(dev);
	if (ret)
	goto err;
	ret = mt7601u_register_device(dev);
	if (ret)
	goto err_hw;

	set_bit(MT7601U_STATE_INITIALIZED, &dev->state);

	return 0;
	err_hw:
	mt7601u_cleanup(dev);
	err:
	usb_set_intfdata(usb_intf, NULL);
	usb_put_dev(interface_to_usbdev(usb_intf));

	destroy_workqueue(dev->stat_wq);
	ieee80211_free_hw(dev->hw);
	return ret;
	}

	static void mt7601u_disconnect(struct usb_interface *usb_intf)
	{
	struct mt7601u_dev *dev = usb_get_intfdata(usb_intf);

	ieee80211_unregister_hw(dev->hw);
	mt7601u_cleanup(dev);

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

	destroy_workqueue(dev->stat_wq);
	ieee80211_free_hw(dev->hw);
	}

	static int mt7601u_suspend(struct usb_interface *usb_intf, pm_message_t state)
	{
	struct mt7601u_dev *dev = usb_get_intfdata(usb_intf);

	mt7601u_cleanup(dev);

	return 0;
	}

	static int mt7601u_resume(struct usb_interface *usb_intf)
	{
	struct mt7601u_dev *dev = usb_get_intfdata(usb_intf);
	int ret;

	ret = mt7601u_init_hardware(dev);
	if (ret)
	return ret;

	set_bit(MT7601U_STATE_INITIALIZED, &dev->state);

	return 0;
	}

	MODULE_DEVICE_TABLE(usb, mt7601u_device_table);
	MODULE_FIRMWARE(MT7601U_FIRMWARE);
	MODULE_LICENSE("GPL");

	static struct usb_driver mt7601u_driver = {
	.name = KBUILD_MODNAME,
	.id_table = mt7601u_device_table,
	.probe = mt7601u_probe,
	.disconnect = mt7601u_disconnect,
	.suspend = mt7601u_suspend,
	.resume = mt7601u_resume,
	.reset_resume = mt7601u_resume,
	.soft_unbind = 1,
	.disable_hub_initiated_lpm = 1,
	};
	module_usb_driver(mt7601u_driver);