ar9170: ar9170: USB frontend driver (b63a2cb3) · Commits · e / devices / android_kernel_teracube_emerald

drivers/net/wireless/ar9170/usb.c

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+747 −0

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		/*
		* Atheros AR9170 driver
		*
		* USB - frontend
		*
		* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
		* Copyright 2009, Christian Lamparter <chunkeey@web.de>
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2 of the License, or
		* (at your option) any later version.
		*
		* 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.
		*
		* You should have received a copy of the GNU General Public License
		* along with this program; see the file COPYING. If not, see
		* http://www.gnu.org/licenses/.
		*
		* This file incorporates work covered by the following copyright and
		* permission notice:
		* Copyright (c) 2007-2008 Atheros Communications, Inc.
		*
		* 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.
		*/

		#include <linux/module.h>
		#include <linux/usb.h>
		#include <linux/firmware.h>
		#include <linux/etherdevice.h>
		#include <net/mac80211.h>
		#include "ar9170.h"
		#include "cmd.h"
		#include "hw.h"
		#include "usb.h"

		MODULE_AUTHOR("Christian Lamparter <chunkeey@web.de>");
		MODULE_LICENSE("GPL");
		MODULE_DESCRIPTION("USB Driver for Atheros AR9170 based devices");
		MODULE_FIRMWARE("ar9170-1.fw");
		MODULE_FIRMWARE("ar9170-2.fw");

		static struct usb_device_id ar9170_usb_ids[] = {
		/* Atheros 9170 */
		{ USB_DEVICE(0x0cf3, 0x9170) },
		/* Atheros TG121N */
		{ USB_DEVICE(0x0cf3, 0x1001) },
		/* D-Link DWA 160A */
		{ USB_DEVICE(0x07d1, 0x3c10) },
		/* Netgear WNDA3100 */
		{ USB_DEVICE(0x0846, 0x9010) },
		/* Netgear WN111 v2 */
		{ USB_DEVICE(0x0846, 0x9001) },
		/* Zydas ZD1221 */
		{ USB_DEVICE(0x0ace, 0x1221) },
		/* Z-Com UB81 BG */
		{ USB_DEVICE(0x0cde, 0x0023) },
		/* Z-Com UB82 ABG */
		{ USB_DEVICE(0x0cde, 0x0026) },
		/* Arcadyan WN7512 */
		{ USB_DEVICE(0x083a, 0xf522) },
		/* Planex GWUS300 */
		{ USB_DEVICE(0x2019, 0x5304) },
		/* IO-Data WNGDNUS2 */
		{ USB_DEVICE(0x04bb, 0x093f) },

		/* terminate */
		{}
		};
		MODULE_DEVICE_TABLE(usb, ar9170_usb_ids);

		static void ar9170_usb_tx_urb_complete_free(struct urb *urb)
		{
		struct sk_buff *skb = urb->context;
		struct ar9170_usb aru = (struct ar9170_usb )
		usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));

		if (!aru) {
		dev_kfree_skb_irq(skb);
		return ;
		}

		ar9170_handle_tx_status(&aru->common, skb, false,
		AR9170_TX_STATUS_COMPLETE);
		}

		static void ar9170_usb_tx_urb_complete(struct urb *urb)
		{
		}

		static void ar9170_usb_irq_completed(struct urb *urb)
		{
		struct ar9170_usb *aru = urb->context;

		switch (urb->status) {
		/* everything is fine */
		case 0:
		break;

		/* disconnect */
		case -ENOENT:
		case -ECONNRESET:
		case -ENODEV:
		case -ESHUTDOWN:
		goto free;

		default:
		goto resubmit;
		}

		print_hex_dump_bytes("ar9170 irq: ", DUMP_PREFIX_OFFSET,
		urb->transfer_buffer, urb->actual_length);

		resubmit:
		usb_anchor_urb(urb, &aru->rx_submitted);
		if (usb_submit_urb(urb, GFP_ATOMIC)) {
		usb_unanchor_urb(urb);
		goto free;
		}

		return;

		free:
		usb_buffer_free(aru->udev, 64, urb->transfer_buffer, urb->transfer_dma);
		}

		static void ar9170_usb_rx_completed(struct urb *urb)
		{
		struct sk_buff *skb = urb->context;
		struct ar9170_usb aru = (struct ar9170_usb )
		usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
		int err;

		if (!aru)
		goto free;

		switch (urb->status) {
		/* everything is fine */
		case 0:
		break;

		/* disconnect */
		case -ENOENT:
		case -ECONNRESET:
		case -ENODEV:
		case -ESHUTDOWN:
		goto free;

		default:
		goto resubmit;
		}

		skb_put(skb, urb->actual_length);
		ar9170_rx(&aru->common, skb);

		resubmit:
		skb_reset_tail_pointer(skb);
		skb_trim(skb, 0);

		usb_anchor_urb(urb, &aru->rx_submitted);
		err = usb_submit_urb(urb, GFP_ATOMIC);
		if (err) {
		usb_unanchor_urb(urb);
		dev_kfree_skb_irq(skb);
		}

		return ;

		free:
		dev_kfree_skb_irq(skb);
		return;
		}

		static int ar9170_usb_prep_rx_urb(struct ar9170_usb *aru,
		struct urb *urb, gfp_t gfp)
		{
		struct sk_buff *skb;

		skb = __dev_alloc_skb(AR9170_MAX_RX_BUFFER_SIZE + 32, gfp);
		if (!skb)
		return -ENOMEM;

		/* reserve some space for mac80211's radiotap */
		skb_reserve(skb, 32);

		usb_fill_bulk_urb(urb, aru->udev,
		usb_rcvbulkpipe(aru->udev, AR9170_EP_RX),
		skb->data, min(skb_tailroom(skb),
		AR9170_MAX_RX_BUFFER_SIZE),
		ar9170_usb_rx_completed, skb);

		return 0;
		}

		static int ar9170_usb_alloc_rx_irq_urb(struct ar9170_usb *aru)
		{
		struct urb *urb = NULL;
		void *ibuf;
		int err = -ENOMEM;

		/* initialize interrupt endpoint */
		urb = usb_alloc_urb(0, GFP_KERNEL);
		if (!urb)
		goto out;

		ibuf = usb_buffer_alloc(aru->udev, 64, GFP_KERNEL, &urb->transfer_dma);
		if (!ibuf)
		goto out;

		usb_fill_int_urb(urb, aru->udev,
		usb_rcvintpipe(aru->udev, AR9170_EP_IRQ), ibuf,
		64, ar9170_usb_irq_completed, aru, 1);
		urb->transfer_flags \|= URB_NO_TRANSFER_DMA_MAP;

		usb_anchor_urb(urb, &aru->rx_submitted);
		err = usb_submit_urb(urb, GFP_KERNEL);
		if (err) {
		usb_unanchor_urb(urb);
		usb_buffer_free(aru->udev, 64, urb->transfer_buffer,
		urb->transfer_dma);
		}

		out:
		usb_free_urb(urb);
		return err;
		}

		static int ar9170_usb_alloc_rx_bulk_urbs(struct ar9170_usb *aru)
		{
		struct urb *urb;
		int i;
		int err = -EINVAL;

		for (i = 0; i < AR9170_NUM_RX_URBS; i++) {
		err = -ENOMEM;
		urb = usb_alloc_urb(0, GFP_KERNEL);
		if (!urb)
		goto err_out;

		err = ar9170_usb_prep_rx_urb(aru, urb, GFP_KERNEL);
		if (err) {
		usb_free_urb(urb);
		goto err_out;
		}

		usb_anchor_urb(urb, &aru->rx_submitted);
		err = usb_submit_urb(urb, GFP_KERNEL);
		if (err) {
		usb_unanchor_urb(urb);
		dev_kfree_skb_any((void *) urb->transfer_buffer);
		usb_free_urb(urb);
		goto err_out;
		}
		usb_free_urb(urb);
		}

		/* the device now waiting for a firmware. */
		aru->common.state = AR9170_IDLE;
		return 0;

		err_out:

		usb_kill_anchored_urbs(&aru->rx_submitted);
		return err;
		}

		static void ar9170_usb_cancel_urbs(struct ar9170_usb *aru)
		{
		int ret;

		aru->common.state = AR9170_UNKNOWN_STATE;

		usb_unlink_anchored_urbs(&aru->tx_submitted);

		/* give the LED OFF command and the deauth frame a chance to air. */
		ret = usb_wait_anchor_empty_timeout(&aru->tx_submitted,
		msecs_to_jiffies(100));
		if (ret == 0)
		dev_err(&aru->udev->dev, "kill pending tx urbs.\n");
		usb_poison_anchored_urbs(&aru->tx_submitted);

		usb_poison_anchored_urbs(&aru->rx_submitted);
		}

		static int ar9170_usb_exec_cmd(struct ar9170 *ar, enum ar9170_cmd cmd,
		unsigned int plen, void *payload,
		unsigned int outlen, void *out)
		{
		struct ar9170_usb aru = (void ) ar;
		struct urb *urb = NULL;
		unsigned long flags;
		int err = -ENOMEM;

		if (unlikely(!IS_ACCEPTING_CMD(ar)))
		return -EPERM;

		if (WARN_ON(plen > AR9170_MAX_CMD_LEN - 4))
		return -EINVAL;

		urb = usb_alloc_urb(0, GFP_ATOMIC);
		if (unlikely(!urb))
		goto err_free;

		ar->cmdbuf[0] = cpu_to_le32(plen);
		ar->cmdbuf[0] \|= cpu_to_le32(cmd << 8);
		/* writing multiple regs fills this buffer already */
		if (plen && payload != (u8 *)(&ar->cmdbuf[1]))
		memcpy(&ar->cmdbuf[1], payload, plen);

		spin_lock_irqsave(&aru->common.cmdlock, flags);
		aru->readbuf = (u8 *)out;
		aru->readlen = outlen;
		spin_unlock_irqrestore(&aru->common.cmdlock, flags);

		usb_fill_int_urb(urb, aru->udev,
		usb_sndbulkpipe(aru->udev, AR9170_EP_CMD),
		aru->common.cmdbuf, plen + 4,
		ar9170_usb_tx_urb_complete, NULL, 1);

		usb_anchor_urb(urb, &aru->tx_submitted);
		err = usb_submit_urb(urb, GFP_ATOMIC);
		if (err) {
		usb_unanchor_urb(urb);
		usb_free_urb(urb);
		goto err_unbuf;
		}
		usb_free_urb(urb);

		err = wait_for_completion_timeout(&aru->cmd_wait, HZ);
		if (err == 0) {
		err = -ETIMEDOUT;
		goto err_unbuf;
		}

		if (outlen >= 0 && aru->readlen != outlen) {
		err = -EMSGSIZE;
		goto err_unbuf;
		}

		return 0;

		err_unbuf:
		/* Maybe the device was removed in the second we were waiting? */
		if (IS_STARTED(ar)) {
		dev_err(&aru->udev->dev, "no command feedback "
		"received (%d).\n", err);

		/* provide some maybe useful debug information */
		print_hex_dump_bytes("ar9170 cmd: ", DUMP_PREFIX_NONE,
		aru->common.cmdbuf, plen + 4);
		dump_stack();
		}

		/* invalidate to avoid completing the next prematurely */
		spin_lock_irqsave(&aru->common.cmdlock, flags);
		aru->readbuf = NULL;
		aru->readlen = 0;
		spin_unlock_irqrestore(&aru->common.cmdlock, flags);

		err_free:

		return err;
		}

		static int ar9170_usb_tx(struct ar9170 ar, struct sk_buff skb,
		bool txstatus_needed, unsigned int extra_len)
		{
		struct ar9170_usb aru = (struct ar9170_usb ) ar;
		struct urb *urb;
		int err;

		if (unlikely(!IS_STARTED(ar))) {
		/* Seriously, what were you drink... err... thinking!? */
		return -EPERM;
		}

		urb = usb_alloc_urb(0, GFP_ATOMIC);
		if (unlikely(!urb))
		return -ENOMEM;

		usb_fill_bulk_urb(urb, aru->udev,
		usb_sndbulkpipe(aru->udev, AR9170_EP_TX),
		skb->data, skb->len + extra_len, (txstatus_needed ?
		ar9170_usb_tx_urb_complete :
		ar9170_usb_tx_urb_complete_free), skb);
		urb->transfer_flags \|= URB_ZERO_PACKET;

		usb_anchor_urb(urb, &aru->tx_submitted);
		err = usb_submit_urb(urb, GFP_ATOMIC);
		if (unlikely(err))
		usb_unanchor_urb(urb);

		usb_free_urb(urb);
		return err;
		}

		static void ar9170_usb_callback_cmd(struct ar9170 ar, u32 len , void buffer)
		{
		struct ar9170_usb aru = (void ) ar;
		unsigned long flags;
		u32 in, out;

		if (!buffer)
		return ;

		in = le32_to_cpup((__le32 *)buffer);
		out = le32_to_cpu(ar->cmdbuf[0]);

		/* mask off length byte */
		out &= ~0xFF;

		if (aru->readlen >= 0) {
		/* add expected length */
		out \|= aru->readlen;
		} else {
		/* add obtained length */
		out \|= in & 0xFF;
		}

		/*
		* Some commands (e.g: AR9170_CMD_FREQUENCY) have a variable response
		* length and we cannot predict the correct length in advance.
		* So we only check if we provided enough space for the data.
		*/
		if (unlikely(out < in)) {
		dev_warn(&aru->udev->dev, "received invalid command response "
		"got %d bytes, instead of %d bytes "
		"and the resp length is %d bytes\n",
		in, out, len);
		print_hex_dump_bytes("ar9170 invalid resp: ",
		DUMP_PREFIX_OFFSET, buffer, len);
		/*
		* Do not complete, then the command times out,
		* and we get a stack trace from there.
		*/
		return ;
		}

		spin_lock_irqsave(&aru->common.cmdlock, flags);
		if (aru->readbuf && len > 0) {
		memcpy(aru->readbuf, buffer + 4, len - 4);
		aru->readbuf = NULL;
		}
		complete(&aru->cmd_wait);
		spin_unlock_irqrestore(&aru->common.cmdlock, flags);
		}

		static int ar9170_usb_upload(struct ar9170_usb aru, const void data,
		size_t len, u32 addr, bool complete)
		{
		int transfer, err;
		u8 *buf = kmalloc(4096, GFP_KERNEL);

		if (!buf)
		return -ENOMEM;

		while (len) {
		transfer = min_t(int, len, 4096);
		memcpy(buf, data, transfer);

		err = usb_control_msg(aru->udev, usb_sndctrlpipe(aru->udev, 0),
		0x30 /* FW DL */, 0x40 \| USB_DIR_OUT,
		addr >> 8, 0, buf, transfer, 1000);

		if (err < 0) {
		kfree(buf);
		return err;
		}

		len -= transfer;
		data += transfer;
		addr += transfer;
		}
		kfree(buf);

		if (complete) {
		err = usb_control_msg(aru->udev, usb_sndctrlpipe(aru->udev, 0),
		0x31 /* FW DL COMPLETE */,
		0x40 \| USB_DIR_OUT, 0, 0, NULL, 0, 5000);
		}

		return 0;
		}

		static int ar9170_usb_request_firmware(struct ar9170_usb *aru)
		{
		int err = 0;

		err = request_firmware(&aru->init_values, "ar9170-1.fw",
		&aru->udev->dev);
		if (err) {
		dev_err(&aru->udev->dev, "file with init values not found.\n");
		return err;
		}

		err = request_firmware(&aru->firmware, "ar9170-2.fw", &aru->udev->dev);
		if (err) {
		release_firmware(aru->init_values);
		dev_err(&aru->udev->dev, "firmware file not found.\n");
		return err;
		}

		return err;
		}

		static int ar9170_usb_reset(struct ar9170_usb *aru)
		{
		int ret, lock = (aru->intf->condition != USB_INTERFACE_BINDING);

		if (lock) {
		ret = usb_lock_device_for_reset(aru->udev, aru->intf);
		if (ret < 0) {
		dev_err(&aru->udev->dev, "unable to lock device "
		"for reset (%d).\n", ret);
		return ret;
		}
		}

		ret = usb_reset_device(aru->udev);
		if (lock)
		usb_unlock_device(aru->udev);

		/* let it rest - for a second - */
		msleep(1000);

		return ret;
		}

		static int ar9170_usb_upload_firmware(struct ar9170_usb *aru)
		{
		int err;

		/* First, upload initial values to device RAM */
		err = ar9170_usb_upload(aru, aru->init_values->data,
		aru->init_values->size, 0x102800, false);
		if (err) {
		dev_err(&aru->udev->dev, "firmware part 1 "
		"upload failed (%d).\n", err);
		return err;
		}

		/* Then, upload the firmware itself and start it */
		return ar9170_usb_upload(aru, aru->firmware->data, aru->firmware->size,
		0x200000, true);
		}

		static int ar9170_usb_init_transport(struct ar9170_usb *aru)
		{
		struct ar9170 ar = (void ) &aru->common;
		int err;

		ar9170_regwrite_begin(ar);

		/* Set USB Rx stream mode MAX packet number to 2 */
		ar9170_regwrite(AR9170_USB_REG_MAX_AGG_UPLOAD, 0x4);

		/* Set USB Rx stream mode timeout to 10us */
		ar9170_regwrite(AR9170_USB_REG_UPLOAD_TIME_CTL, 0x80);

		ar9170_regwrite_finish();

		err = ar9170_regwrite_result();
		if (err)
		dev_err(&aru->udev->dev, "USB setup failed (%d).\n", err);

		return err;
		}

		static void ar9170_usb_stop(struct ar9170 *ar)
		{
		struct ar9170_usb aru = (void ) ar;
		int ret;

		if (IS_ACCEPTING_CMD(ar))
		aru->common.state = AR9170_STOPPED;

		/* lets wait a while until the tx - queues are dried out */
		ret = usb_wait_anchor_empty_timeout(&aru->tx_submitted,
		msecs_to_jiffies(1000));
		if (ret == 0)
		dev_err(&aru->udev->dev, "kill pending tx urbs.\n");

		usb_poison_anchored_urbs(&aru->tx_submitted);

		/*
		* Note:
		* So far we freed all tx urbs, but we won't dare to touch any rx urbs.
		* Else we would end up with a unresponsive device...
		*/
		}

		static int ar9170_usb_open(struct ar9170 *ar)
		{
		struct ar9170_usb aru = (void ) ar;
		int err;

		usb_unpoison_anchored_urbs(&aru->tx_submitted);
		err = ar9170_usb_init_transport(aru);
		if (err) {
		usb_poison_anchored_urbs(&aru->tx_submitted);
		return err;
		}

		aru->common.state = AR9170_IDLE;
		return 0;
		}

		static int ar9170_usb_probe(struct usb_interface *intf,
		const struct usb_device_id *id)
		{
		struct ar9170_usb *aru;
		struct ar9170 *ar;
		struct usb_device *udev;
		int err;

		aru = ar9170_alloc(sizeof(*aru));
		if (IS_ERR(aru)) {
		err = PTR_ERR(aru);
		goto out;
		}

		udev = interface_to_usbdev(intf);
		usb_get_dev(udev);
		aru->udev = udev;
		aru->intf = intf;
		ar = &aru->common;

		usb_set_intfdata(intf, aru);
		SET_IEEE80211_DEV(ar->hw, &udev->dev);

		init_usb_anchor(&aru->rx_submitted);
		init_usb_anchor(&aru->tx_submitted);
		init_completion(&aru->cmd_wait);

		aru->common.stop = ar9170_usb_stop;
		aru->common.open = ar9170_usb_open;
		aru->common.tx = ar9170_usb_tx;
		aru->common.exec_cmd = ar9170_usb_exec_cmd;
		aru->common.callback_cmd = ar9170_usb_callback_cmd;

		err = ar9170_usb_reset(aru);
		if (err)
		goto err_unlock;

		err = ar9170_usb_request_firmware(aru);
		if (err)
		goto err_unlock;

		err = ar9170_usb_alloc_rx_irq_urb(aru);
		if (err)
		goto err_freefw;

		err = ar9170_usb_alloc_rx_bulk_urbs(aru);
		if (err)
		goto err_unrx;

		err = ar9170_usb_upload_firmware(aru);
		if (err) {
		err = ar9170_echo_test(&aru->common, 0x60d43110);
		if (err) {
		/* force user invention, by disabling the device */
		err = usb_driver_set_configuration(aru->udev, -1);
		dev_err(&aru->udev->dev, "device is in a bad state. "
		"please reconnect it!\n");
		goto err_unrx;
		}
		}

		err = ar9170_usb_open(ar);
		if (err)
		goto err_unrx;

		err = ar9170_register(ar, &udev->dev);

		ar9170_usb_stop(ar);
		if (err)
		goto err_unrx;

		return 0;

		err_unrx:
		ar9170_usb_cancel_urbs(aru);

		err_freefw:
		release_firmware(aru->init_values);
		release_firmware(aru->firmware);

		err_unlock:
		usb_set_intfdata(intf, NULL);
		usb_put_dev(udev);
		ieee80211_free_hw(ar->hw);
		out:
		return err;
		}

		static void ar9170_usb_disconnect(struct usb_interface *intf)
		{
		struct ar9170_usb *aru = usb_get_intfdata(intf);

		if (!aru)
		return;

		aru->common.state = AR9170_IDLE;
		ar9170_unregister(&aru->common);
		ar9170_usb_cancel_urbs(aru);

		release_firmware(aru->init_values);
		release_firmware(aru->firmware);

		usb_put_dev(aru->udev);
		usb_set_intfdata(intf, NULL);
		ieee80211_free_hw(aru->common.hw);
		}

		static struct usb_driver ar9170_driver = {
		.name = "ar9170usb",
		.probe = ar9170_usb_probe,
		.disconnect = ar9170_usb_disconnect,
		.id_table = ar9170_usb_ids,
		.soft_unbind = 1,
		};

		static int __init ar9170_init(void)
		{
		return usb_register(&ar9170_driver);
		}

		static void __exit ar9170_exit(void)
		{
		usb_deregister(&ar9170_driver);
		}

		module_init(ar9170_init);
		module_exit(ar9170_exit);

drivers/net/wireless/ar9170/usb.h

0 → 100644

+74 −0

Original line number	Diff line number	Diff line
		/*
		* Atheros AR9170 USB driver
		*
		* Driver specific definitions
		*
		* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
		* Copyright 2009, Christian Lamparter <chunkeey@web.de>
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2 of the License, or
		* (at your option) any later version.
		*
		* 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.
		*
		* You should have received a copy of the GNU General Public License
		* along with this program; see the file COPYING. If not, see
		* http://www.gnu.org/licenses/.
		*
		* This file incorporates work covered by the following copyright and
		* permission notice:
		* Copyright (c) 2007-2008 Atheros Communications, Inc.
		*
		* 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 __USB_H
		#define __USB_H

		#include <linux/usb.h>
		#include <linux/completion.h>
		#include <linux/spinlock.h>
		#include <linux/leds.h>
		#include <net/wireless.h>
		#include <net/mac80211.h>
		#include <linux/firmware.h>
		#include "eeprom.h"
		#include "hw.h"
		#include "ar9170.h"

		#define AR9170_NUM_RX_URBS 16

		struct firmware;

		struct ar9170_usb {
		struct ar9170 common;
		struct usb_device *udev;
		struct usb_interface *intf;

		struct usb_anchor rx_submitted;
		struct usb_anchor tx_submitted;

		spinlock_t cmdlock;
		struct completion cmd_wait;
		int readlen;
		u8 *readbuf;

		const struct firmware *init_values;
		const struct firmware *firmware;
		};

		#endif /* __USB_H */