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/drivers/net/wireless/rtlwifi/usb.c

http://github.com/mirrors/linux
C | 1174 lines | 918 code | 168 blank | 88 comment | 100 complexity | 2207f20419651738c8a2a5a7c9de6e63 MD5 | raw file
   1/******************************************************************************
   2 *
   3 * Copyright(c) 2009-2012  Realtek Corporation. All rights reserved.
   4 *
   5 * This program is free software; you can redistribute it and/or modify it
   6 * under the terms of version 2 of the GNU General Public License as
   7 * published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful, but WITHOUT
  10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12 * more details.
  13 *
  14 * You should have received a copy of the GNU General Public License along with
  15 * this program; if not, write to the Free Software Foundation, Inc.,
  16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
  17 *
  18 * The full GNU General Public License is included in this distribution in the
  19 * file called LICENSE.
  20 *
  21 * Contact Information:
  22 * wlanfae <wlanfae@realtek.com>
  23 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
  24 * Hsinchu 300, Taiwan.
  25 *
  26 *****************************************************************************/
  27
  28#include "wifi.h"
  29#include "core.h"
  30#include "usb.h"
  31#include "base.h"
  32#include "ps.h"
  33#include "rtl8192c/fw_common.h"
  34#include <linux/export.h>
  35#include <linux/module.h>
  36
  37MODULE_AUTHOR("lizhaoming	<chaoming_li@realsil.com.cn>");
  38MODULE_AUTHOR("Realtek WlanFAE	<wlanfae@realtek.com>");
  39MODULE_AUTHOR("Larry Finger	<Larry.FInger@lwfinger.net>");
  40MODULE_LICENSE("GPL");
  41MODULE_DESCRIPTION("USB basic driver for rtlwifi");
  42
  43#define	REALTEK_USB_VENQT_READ			0xC0
  44#define	REALTEK_USB_VENQT_WRITE			0x40
  45#define REALTEK_USB_VENQT_CMD_REQ		0x05
  46#define	REALTEK_USB_VENQT_CMD_IDX		0x00
  47
  48#define MAX_USBCTRL_VENDORREQ_TIMES		10
  49
  50static void usbctrl_async_callback(struct urb *urb)
  51{
  52	if (urb) {
  53		/* free dr */
  54		kfree(urb->setup_packet);
  55		/* free databuf */
  56		kfree(urb->transfer_buffer);
  57	}
  58}
  59
  60static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request,
  61					  u16 value, u16 index, void *pdata,
  62					  u16 len)
  63{
  64	int rc;
  65	unsigned int pipe;
  66	u8 reqtype;
  67	struct usb_ctrlrequest *dr;
  68	struct urb *urb;
  69	const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE;
  70	u8 *databuf;
  71
  72	if (WARN_ON_ONCE(len > databuf_maxlen))
  73		len = databuf_maxlen;
  74
  75	pipe = usb_sndctrlpipe(udev, 0); /* write_out */
  76	reqtype =  REALTEK_USB_VENQT_WRITE;
  77
  78	dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
  79	if (!dr)
  80		return -ENOMEM;
  81
  82	databuf = kmalloc(databuf_maxlen, GFP_ATOMIC);
  83	if (!databuf) {
  84		kfree(dr);
  85		return -ENOMEM;
  86	}
  87
  88	urb = usb_alloc_urb(0, GFP_ATOMIC);
  89	if (!urb) {
  90		kfree(databuf);
  91		kfree(dr);
  92		return -ENOMEM;
  93	}
  94
  95	dr->bRequestType = reqtype;
  96	dr->bRequest = request;
  97	dr->wValue = cpu_to_le16(value);
  98	dr->wIndex = cpu_to_le16(index);
  99	dr->wLength = cpu_to_le16(len);
 100	/* data are already in little-endian order */
 101	memcpy(databuf, pdata, len);
 102	usb_fill_control_urb(urb, udev, pipe,
 103			     (unsigned char *)dr, databuf, len,
 104			     usbctrl_async_callback, NULL);
 105	rc = usb_submit_urb(urb, GFP_ATOMIC);
 106	if (rc < 0) {
 107		kfree(databuf);
 108		kfree(dr);
 109	}
 110	usb_free_urb(urb);
 111	return rc;
 112}
 113
 114static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request,
 115					u16 value, u16 index, void *pdata,
 116					u16 len)
 117{
 118	unsigned int pipe;
 119	int status;
 120	u8 reqtype;
 121	int vendorreq_times = 0;
 122	static int count;
 123
 124	pipe = usb_rcvctrlpipe(udev, 0); /* read_in */
 125	reqtype =  REALTEK_USB_VENQT_READ;
 126
 127	do {
 128		status = usb_control_msg(udev, pipe, request, reqtype, value,
 129					 index, pdata, len, 0); /*max. timeout*/
 130		if (status < 0) {
 131			/* firmware download is checksumed, don't retry */
 132			if ((value >= FW_8192C_START_ADDRESS &&
 133			    value <= FW_8192C_END_ADDRESS))
 134				break;
 135		} else {
 136			break;
 137		}
 138	} while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);
 139
 140	if (status < 0 && count++ < 4)
 141		pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n",
 142		       value, status, *(u32 *)pdata);
 143	return status;
 144}
 145
 146static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)
 147{
 148	struct device *dev = rtlpriv->io.dev;
 149	struct usb_device *udev = to_usb_device(dev);
 150	u8 request;
 151	u16 wvalue;
 152	u16 index;
 153	__le32 *data;
 154	unsigned long flags;
 155
 156	spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);
 157	if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)
 158		rtlpriv->usb_data_index = 0;
 159	data = &rtlpriv->usb_data[rtlpriv->usb_data_index];
 160	spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);
 161	request = REALTEK_USB_VENQT_CMD_REQ;
 162	index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 163
 164	wvalue = (u16)addr;
 165	_usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len);
 166	return le32_to_cpu(*data);
 167}
 168
 169static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)
 170{
 171	return (u8)_usb_read_sync(rtlpriv, addr, 1);
 172}
 173
 174static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)
 175{
 176	return (u16)_usb_read_sync(rtlpriv, addr, 2);
 177}
 178
 179static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)
 180{
 181	return _usb_read_sync(rtlpriv, addr, 4);
 182}
 183
 184static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val,
 185			     u16 len)
 186{
 187	u8 request;
 188	u16 wvalue;
 189	u16 index;
 190	__le32 data;
 191
 192	request = REALTEK_USB_VENQT_CMD_REQ;
 193	index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */
 194	wvalue = (u16)(addr&0x0000ffff);
 195	data = cpu_to_le32(val);
 196	_usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data,
 197				       len);
 198}
 199
 200static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val)
 201{
 202	struct device *dev = rtlpriv->io.dev;
 203
 204	_usb_write_async(to_usb_device(dev), addr, val, 1);
 205}
 206
 207static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val)
 208{
 209	struct device *dev = rtlpriv->io.dev;
 210
 211	_usb_write_async(to_usb_device(dev), addr, val, 2);
 212}
 213
 214static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val)
 215{
 216	struct device *dev = rtlpriv->io.dev;
 217
 218	_usb_write_async(to_usb_device(dev), addr, val, 4);
 219}
 220
 221static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data,
 222			     u16 len)
 223{
 224	struct device *dev = rtlpriv->io.dev;
 225	struct usb_device *udev = to_usb_device(dev);
 226	u8 request = REALTEK_USB_VENQT_CMD_REQ;
 227	u8 reqtype =  REALTEK_USB_VENQT_WRITE;
 228	u16 wvalue;
 229	u16 index = REALTEK_USB_VENQT_CMD_IDX;
 230	int pipe = usb_sndctrlpipe(udev, 0); /* write_out */
 231	u8 *buffer;
 232
 233	wvalue = (u16)(addr & 0x0000ffff);
 234	buffer = kmemdup(data, len, GFP_ATOMIC);
 235	if (!buffer)
 236		return;
 237	usb_control_msg(udev, pipe, request, reqtype, wvalue,
 238			index, buffer, len, 50);
 239
 240	kfree(buffer);
 241}
 242
 243static void _rtl_usb_io_handler_init(struct device *dev,
 244				     struct ieee80211_hw *hw)
 245{
 246	struct rtl_priv *rtlpriv = rtl_priv(hw);
 247
 248	rtlpriv->io.dev = dev;
 249	mutex_init(&rtlpriv->io.bb_mutex);
 250	rtlpriv->io.write8_async	= _usb_write8_async;
 251	rtlpriv->io.write16_async	= _usb_write16_async;
 252	rtlpriv->io.write32_async	= _usb_write32_async;
 253	rtlpriv->io.read8_sync		= _usb_read8_sync;
 254	rtlpriv->io.read16_sync		= _usb_read16_sync;
 255	rtlpriv->io.read32_sync		= _usb_read32_sync;
 256	rtlpriv->io.writeN_sync		= _usb_writeN_sync;
 257}
 258
 259static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)
 260{
 261	struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);
 262
 263	mutex_destroy(&rtlpriv->io.bb_mutex);
 264}
 265
 266/**
 267 *
 268 *	Default aggregation handler. Do nothing and just return the oldest skb.
 269 */
 270static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,
 271						  struct sk_buff_head *list)
 272{
 273	return skb_dequeue(list);
 274}
 275
 276#define IS_HIGH_SPEED_USB(udev) \
 277		((USB_SPEED_HIGH == (udev)->speed) ? true : false)
 278
 279static int _rtl_usb_init_tx(struct ieee80211_hw *hw)
 280{
 281	u32 i;
 282	struct rtl_priv *rtlpriv = rtl_priv(hw);
 283	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 284
 285	rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)
 286						    ? USB_HIGH_SPEED_BULK_SIZE
 287						    : USB_FULL_SPEED_BULK_SIZE;
 288
 289	RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",
 290		 rtlusb->max_bulk_out_size);
 291
 292	for (i = 0; i < __RTL_TXQ_NUM; i++) {
 293		u32 ep_num = rtlusb->ep_map.ep_mapping[i];
 294		if (!ep_num) {
 295			RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 296				 "Invalid endpoint map setting!\n");
 297			return -EINVAL;
 298		}
 299	}
 300
 301	rtlusb->usb_tx_post_hdl =
 302		 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;
 303	rtlusb->usb_tx_cleanup	=
 304		 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;
 305	rtlusb->usb_tx_aggregate_hdl =
 306		 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)
 307		 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl
 308		 : &_none_usb_tx_aggregate_hdl;
 309
 310	init_usb_anchor(&rtlusb->tx_submitted);
 311	for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 312		skb_queue_head_init(&rtlusb->tx_skb_queue[i]);
 313		init_usb_anchor(&rtlusb->tx_pending[i]);
 314	}
 315	return 0;
 316}
 317
 318static void _rtl_rx_work(unsigned long param);
 319
 320static int _rtl_usb_init_rx(struct ieee80211_hw *hw)
 321{
 322	struct rtl_priv *rtlpriv = rtl_priv(hw);
 323	struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 324	struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 325
 326	rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;
 327	rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;
 328	rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num;
 329	rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;
 330	rtlusb->usb_rx_segregate_hdl =
 331		rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;
 332
 333	pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",
 334		rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);
 335	init_usb_anchor(&rtlusb->rx_submitted);
 336	init_usb_anchor(&rtlusb->rx_cleanup_urbs);
 337
 338	skb_queue_head_init(&rtlusb->rx_queue);
 339	rtlusb->rx_work_tasklet.func = _rtl_rx_work;
 340	rtlusb->rx_work_tasklet.data = (unsigned long)rtlusb;
 341
 342	return 0;
 343}
 344
 345static int _rtl_usb_init(struct ieee80211_hw *hw)
 346{
 347	struct rtl_priv *rtlpriv = rtl_priv(hw);
 348	struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);
 349	struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);
 350	int err;
 351	u8 epidx;
 352	struct usb_interface	*usb_intf = rtlusb->intf;
 353	u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;
 354
 355	rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;
 356	for (epidx = 0; epidx < epnums; epidx++) {
 357		struct usb_endpoint_descriptor *pep_desc;
 358		pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;
 359
 360		if (usb_endpoint_dir_in(pep_desc))
 361			rtlusb->in_ep_nums++;
 362		else if (usb_endpoint_dir_out(pep_desc))
 363			rtlusb->out_ep_nums++;
 364
 365		RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG,
 366			 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",
 367			 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,
 368			 pep_desc->bInterval);
 369	}
 370	if (rtlusb->in_ep_nums <  rtlpriv->cfg->usb_interface_cfg->in_ep_num) {
 371		pr_err("Too few input end points found\n");
 372		return -EINVAL;
 373	}
 374	if (rtlusb->out_ep_nums == 0) {
 375		pr_err("No output end points found\n");
 376		return -EINVAL;
 377	}
 378	/* usb endpoint mapping */
 379	err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);
 380	rtlusb->usb_mq_to_hwq =  rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;
 381	_rtl_usb_init_tx(hw);
 382	_rtl_usb_init_rx(hw);
 383	return err;
 384}
 385
 386static void rtl_usb_init_sw(struct ieee80211_hw *hw)
 387{
 388	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 389	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 390	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));
 391	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 392
 393	rtlhal->hw = hw;
 394	ppsc->inactiveps = false;
 395	ppsc->leisure_ps = false;
 396	ppsc->fwctrl_lps = false;
 397	ppsc->reg_fwctrl_lps = 3;
 398	ppsc->reg_max_lps_awakeintvl = 5;
 399	ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;
 400
 401	 /* IBSS */
 402	mac->beacon_interval = 100;
 403
 404	 /* AMPDU */
 405	mac->min_space_cfg = 0;
 406	mac->max_mss_density = 0;
 407
 408	/* set sane AMPDU defaults */
 409	mac->current_ampdu_density = 7;
 410	mac->current_ampdu_factor = 3;
 411
 412	/* QOS */
 413	rtlusb->acm_method = eAcmWay2_SW;
 414
 415	/* IRQ */
 416	/* HIMR - turn all on */
 417	rtlusb->irq_mask[0] = 0xFFFFFFFF;
 418	/* HIMR_EX - turn all on */
 419	rtlusb->irq_mask[1] = 0xFFFFFFFF;
 420	rtlusb->disableHWSM =  true;
 421}
 422
 423static void _rtl_rx_completed(struct urb *urb);
 424
 425static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb,
 426			      struct urb *urb, gfp_t gfp_mask)
 427{
 428	struct rtl_priv *rtlpriv = rtl_priv(hw);
 429	void *buf;
 430
 431	buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask,
 432				 &urb->transfer_dma);
 433	if (!buf) {
 434		RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 435			 "Failed to usb_alloc_coherent!!\n");
 436		return -ENOMEM;
 437	}
 438
 439	usb_fill_bulk_urb(urb, rtlusb->udev,
 440			  usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),
 441			  buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb);
 442	urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 443
 444	return 0;
 445}
 446
 447static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,
 448				    struct sk_buff *skb)
 449{
 450	struct rtl_priv *rtlpriv = rtl_priv(hw);
 451	u8 *rxdesc = skb->data;
 452	struct ieee80211_hdr *hdr;
 453	bool unicast = false;
 454	__le16 fc;
 455	struct ieee80211_rx_status rx_status = {0};
 456	struct rtl_stats stats = {
 457		.signal = 0,
 458		.noise = -98,
 459		.rate = 0,
 460	};
 461
 462	skb_pull(skb, RTL_RX_DESC_SIZE);
 463	rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 464	skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 465	hdr = (struct ieee80211_hdr *)(skb->data);
 466	fc = hdr->frame_control;
 467	if (!stats.crc) {
 468		memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 469
 470		if (is_broadcast_ether_addr(hdr->addr1)) {
 471			/*TODO*/;
 472		} else if (is_multicast_ether_addr(hdr->addr1)) {
 473			/*TODO*/
 474		} else {
 475			unicast = true;
 476			rtlpriv->stats.rxbytesunicast +=  skb->len;
 477		}
 478
 479		rtl_is_special_data(hw, skb, false);
 480
 481		if (ieee80211_is_data(fc)) {
 482			rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 483
 484			if (unicast)
 485				rtlpriv->link_info.num_rx_inperiod++;
 486		}
 487	}
 488}
 489
 490static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,
 491				      struct sk_buff *skb)
 492{
 493	struct rtl_priv *rtlpriv = rtl_priv(hw);
 494	u8 *rxdesc = skb->data;
 495	struct ieee80211_hdr *hdr;
 496	bool unicast = false;
 497	__le16 fc;
 498	struct ieee80211_rx_status rx_status = {0};
 499	struct rtl_stats stats = {
 500		.signal = 0,
 501		.noise = -98,
 502		.rate = 0,
 503	};
 504
 505	skb_pull(skb, RTL_RX_DESC_SIZE);
 506	rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);
 507	skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));
 508	hdr = (struct ieee80211_hdr *)(skb->data);
 509	fc = hdr->frame_control;
 510	if (!stats.crc) {
 511		memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
 512
 513		if (is_broadcast_ether_addr(hdr->addr1)) {
 514			/*TODO*/;
 515		} else if (is_multicast_ether_addr(hdr->addr1)) {
 516			/*TODO*/
 517		} else {
 518			unicast = true;
 519			rtlpriv->stats.rxbytesunicast +=  skb->len;
 520		}
 521
 522		rtl_is_special_data(hw, skb, false);
 523
 524		if (ieee80211_is_data(fc)) {
 525			rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);
 526
 527			if (unicast)
 528				rtlpriv->link_info.num_rx_inperiod++;
 529		}
 530
 531		/* static bcn for roaming */
 532		rtl_beacon_statistic(hw, skb);
 533
 534		if (likely(rtl_action_proc(hw, skb, false)))
 535			ieee80211_rx(hw, skb);
 536		else
 537			dev_kfree_skb_any(skb);
 538	}
 539}
 540
 541static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)
 542{
 543	struct sk_buff *_skb;
 544	struct sk_buff_head rx_queue;
 545	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 546
 547	skb_queue_head_init(&rx_queue);
 548	if (rtlusb->usb_rx_segregate_hdl)
 549		rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);
 550	WARN_ON(skb_queue_empty(&rx_queue));
 551	while (!skb_queue_empty(&rx_queue)) {
 552		_skb = skb_dequeue(&rx_queue);
 553		_rtl_usb_rx_process_agg(hw, _skb);
 554		ieee80211_rx(hw, _skb);
 555	}
 556}
 557
 558#define __RX_SKB_MAX_QUEUED	32
 559
 560static void _rtl_rx_work(unsigned long param)
 561{
 562	struct rtl_usb *rtlusb = (struct rtl_usb *)param;
 563	struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 564	struct sk_buff *skb;
 565
 566	while ((skb = skb_dequeue(&rtlusb->rx_queue))) {
 567		if (unlikely(IS_USB_STOP(rtlusb))) {
 568			dev_kfree_skb_any(skb);
 569			continue;
 570		}
 571
 572		if (likely(!rtlusb->usb_rx_segregate_hdl)) {
 573			_rtl_usb_rx_process_noagg(hw, skb);
 574		} else {
 575			/* TO DO */
 576			_rtl_rx_pre_process(hw, skb);
 577			pr_err("rx agg not supported\n");
 578		}
 579	}
 580}
 581
 582static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,
 583					unsigned int len)
 584{
 585	unsigned int padding = 0;
 586
 587	/* make function no-op when possible */
 588	if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))
 589		return 0;
 590
 591	/* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */
 592	/* TODO: deduplicate common code, define helper function instead? */
 593
 594	if (ieee80211_is_data_qos(hdr->frame_control)) {
 595		u8 *qc = ieee80211_get_qos_ctl(hdr);
 596
 597		padding ^= NET_IP_ALIGN;
 598
 599		/* Input might be invalid, avoid accessing memory outside
 600		 * the buffer.
 601		 */
 602		if ((unsigned long)qc - (unsigned long)hdr < len &&
 603		    *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)
 604			padding ^= NET_IP_ALIGN;
 605	}
 606
 607	if (ieee80211_has_a4(hdr->frame_control))
 608		padding ^= NET_IP_ALIGN;
 609
 610	return padding;
 611}
 612
 613#define __RADIO_TAP_SIZE_RSV	32
 614
 615static void _rtl_rx_completed(struct urb *_urb)
 616{
 617	struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;
 618	struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 619	struct rtl_priv *rtlpriv = rtl_priv(hw);
 620	int err = 0;
 621
 622	if (unlikely(IS_USB_STOP(rtlusb)))
 623		goto free;
 624
 625	if (likely(0 == _urb->status)) {
 626		unsigned int padding;
 627		struct sk_buff *skb;
 628		unsigned int qlen;
 629		unsigned int size = _urb->actual_length;
 630		struct ieee80211_hdr *hdr;
 631
 632		if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {
 633			RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 634				 "Too short packet from bulk IN! (len: %d)\n",
 635				 size);
 636			goto resubmit;
 637		}
 638
 639		qlen = skb_queue_len(&rtlusb->rx_queue);
 640		if (qlen >= __RX_SKB_MAX_QUEUED) {
 641			RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 642				 "Pending RX skbuff queue full! (qlen: %d)\n",
 643				 qlen);
 644			goto resubmit;
 645		}
 646
 647		hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE);
 648		padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE);
 649
 650		skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding);
 651		if (!skb) {
 652			RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 653				 "Can't allocate skb for bulk IN!\n");
 654			goto resubmit;
 655		}
 656
 657		_rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);
 658
 659		/* Make sure the payload data is 4 byte aligned. */
 660		skb_reserve(skb, padding);
 661
 662		/* reserve some space for mac80211's radiotap */
 663		skb_reserve(skb, __RADIO_TAP_SIZE_RSV);
 664
 665		memcpy(skb_put(skb, size), _urb->transfer_buffer, size);
 666
 667		skb_queue_tail(&rtlusb->rx_queue, skb);
 668		tasklet_schedule(&rtlusb->rx_work_tasklet);
 669
 670		goto resubmit;
 671	}
 672
 673	switch (_urb->status) {
 674	/* disconnect */
 675	case -ENOENT:
 676	case -ECONNRESET:
 677	case -ENODEV:
 678	case -ESHUTDOWN:
 679		goto free;
 680	default:
 681		break;
 682	}
 683
 684resubmit:
 685	usb_anchor_urb(_urb, &rtlusb->rx_submitted);
 686	err = usb_submit_urb(_urb, GFP_ATOMIC);
 687	if (unlikely(err)) {
 688		usb_unanchor_urb(_urb);
 689		goto free;
 690	}
 691	return;
 692
 693free:
 694	/* On some architectures, usb_free_coherent must not be called from
 695	 * hardirq context. Queue urb to cleanup list.
 696	 */
 697	usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);
 698}
 699
 700#undef __RADIO_TAP_SIZE_RSV
 701
 702static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)
 703{
 704	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 705	struct urb *urb;
 706
 707	usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 708
 709	tasklet_kill(&rtlusb->rx_work_tasklet);
 710	skb_queue_purge(&rtlusb->rx_queue);
 711
 712	while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {
 713		usb_free_coherent(urb->dev, urb->transfer_buffer_length,
 714				urb->transfer_buffer, urb->transfer_dma);
 715		usb_free_urb(urb);
 716	}
 717}
 718
 719static int _rtl_usb_receive(struct ieee80211_hw *hw)
 720{
 721	struct urb *urb;
 722	int err;
 723	int i;
 724	struct rtl_priv *rtlpriv = rtl_priv(hw);
 725	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 726
 727	WARN_ON(0 == rtlusb->rx_urb_num);
 728	/* 1600 == 1514 + max WLAN header + rtk info */
 729	WARN_ON(rtlusb->rx_max_size < 1600);
 730
 731	for (i = 0; i < rtlusb->rx_urb_num; i++) {
 732		err = -ENOMEM;
 733		urb = usb_alloc_urb(0, GFP_KERNEL);
 734		if (!urb) {
 735			RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 736				 "Failed to alloc URB!!\n");
 737			goto err_out;
 738		}
 739
 740		err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);
 741		if (err < 0) {
 742			RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 743				 "Failed to prep_rx_urb!!\n");
 744			usb_free_urb(urb);
 745			goto err_out;
 746		}
 747
 748		usb_anchor_urb(urb, &rtlusb->rx_submitted);
 749		err = usb_submit_urb(urb, GFP_KERNEL);
 750		if (err)
 751			goto err_out;
 752		usb_free_urb(urb);
 753	}
 754	return 0;
 755
 756err_out:
 757	usb_kill_anchored_urbs(&rtlusb->rx_submitted);
 758	_rtl_usb_cleanup_rx(hw);
 759	return err;
 760}
 761
 762static int rtl_usb_start(struct ieee80211_hw *hw)
 763{
 764	int err;
 765	struct rtl_priv *rtlpriv = rtl_priv(hw);
 766	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 767	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 768
 769	err = rtlpriv->cfg->ops->hw_init(hw);
 770	if (!err) {
 771		rtl_init_rx_config(hw);
 772
 773		/* Enable software */
 774		SET_USB_START(rtlusb);
 775		/* should after adapter start and interrupt enable. */
 776		set_hal_start(rtlhal);
 777
 778		/* Start bulk IN */
 779		err = _rtl_usb_receive(hw);
 780	}
 781
 782	return err;
 783}
 784/**
 785 *
 786 *
 787 */
 788
 789/*=======================  tx =========================================*/
 790static void rtl_usb_cleanup(struct ieee80211_hw *hw)
 791{
 792	u32 i;
 793	struct sk_buff *_skb;
 794	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 795	struct ieee80211_tx_info *txinfo;
 796
 797	SET_USB_STOP(rtlusb);
 798
 799	/* clean up rx stuff. */
 800	_rtl_usb_cleanup_rx(hw);
 801
 802	/* clean up tx stuff */
 803	for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {
 804		while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {
 805			rtlusb->usb_tx_cleanup(hw, _skb);
 806			txinfo = IEEE80211_SKB_CB(_skb);
 807			ieee80211_tx_info_clear_status(txinfo);
 808			txinfo->flags |= IEEE80211_TX_STAT_ACK;
 809			ieee80211_tx_status_irqsafe(hw, _skb);
 810		}
 811		usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);
 812	}
 813	usb_kill_anchored_urbs(&rtlusb->tx_submitted);
 814}
 815
 816/**
 817 *
 818 * We may add some struct into struct rtl_usb later. Do deinit here.
 819 *
 820 */
 821static void rtl_usb_deinit(struct ieee80211_hw *hw)
 822{
 823	rtl_usb_cleanup(hw);
 824}
 825
 826static void rtl_usb_stop(struct ieee80211_hw *hw)
 827{
 828	struct rtl_priv *rtlpriv = rtl_priv(hw);
 829	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
 830	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 831
 832	/* should after adapter start and interrupt enable. */
 833	set_hal_stop(rtlhal);
 834	cancel_work_sync(&rtlpriv->works.fill_h2c_cmd);
 835	/* Enable software */
 836	SET_USB_STOP(rtlusb);
 837	rtl_usb_deinit(hw);
 838	rtlpriv->cfg->ops->hw_disable(hw);
 839}
 840
 841static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)
 842{
 843	int err;
 844	struct rtl_priv *rtlpriv = rtl_priv(hw);
 845	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 846
 847	usb_anchor_urb(_urb, &rtlusb->tx_submitted);
 848	err = usb_submit_urb(_urb, GFP_ATOMIC);
 849	if (err < 0) {
 850		struct sk_buff *skb;
 851
 852		RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 853			 "Failed to submit urb\n");
 854		usb_unanchor_urb(_urb);
 855		skb = (struct sk_buff *)_urb->context;
 856		kfree_skb(skb);
 857	}
 858	usb_free_urb(_urb);
 859}
 860
 861static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,
 862			struct sk_buff *skb)
 863{
 864	struct rtl_priv *rtlpriv = rtl_priv(hw);
 865	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 866	struct ieee80211_tx_info *txinfo;
 867
 868	rtlusb->usb_tx_post_hdl(hw, urb, skb);
 869	skb_pull(skb, RTL_TX_HEADER_SIZE);
 870	txinfo = IEEE80211_SKB_CB(skb);
 871	ieee80211_tx_info_clear_status(txinfo);
 872	txinfo->flags |= IEEE80211_TX_STAT_ACK;
 873
 874	if (urb->status) {
 875		RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 876			 "Urb has error status 0x%X\n", urb->status);
 877		goto out;
 878	}
 879	/*  TODO:	statistics */
 880out:
 881	ieee80211_tx_status_irqsafe(hw, skb);
 882	return urb->status;
 883}
 884
 885static void _rtl_tx_complete(struct urb *urb)
 886{
 887	struct sk_buff *skb = (struct sk_buff *)urb->context;
 888	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 889	struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];
 890	struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);
 891	int err;
 892
 893	if (unlikely(IS_USB_STOP(rtlusb)))
 894		return;
 895	err = _usb_tx_post(hw, urb, skb);
 896	if (err) {
 897		/* Ignore error and keep issuiing other urbs */
 898		return;
 899	}
 900}
 901
 902static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,
 903				struct sk_buff *skb, u32 ep_num)
 904{
 905	struct rtl_priv *rtlpriv = rtl_priv(hw);
 906	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 907	struct urb *_urb;
 908
 909	WARN_ON(NULL == skb);
 910	_urb = usb_alloc_urb(0, GFP_ATOMIC);
 911	if (!_urb) {
 912		RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 913			 "Can't allocate URB for bulk out!\n");
 914		kfree_skb(skb);
 915		return NULL;
 916	}
 917	_rtl_install_trx_info(rtlusb, skb, ep_num);
 918	usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,
 919			  ep_num), skb->data, skb->len, _rtl_tx_complete, skb);
 920	_urb->transfer_flags |= URB_ZERO_PACKET;
 921	return _urb;
 922}
 923
 924static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,
 925		       enum rtl_txq qnum)
 926{
 927	struct rtl_priv *rtlpriv = rtl_priv(hw);
 928	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
 929	u32 ep_num;
 930	struct urb *_urb = NULL;
 931	struct sk_buff *_skb = NULL;
 932
 933	WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);
 934	if (unlikely(IS_USB_STOP(rtlusb))) {
 935		RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG,
 936			 "USB device is stopping...\n");
 937		kfree_skb(skb);
 938		return;
 939	}
 940	ep_num = rtlusb->ep_map.ep_mapping[qnum];
 941	_skb = skb;
 942	_urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num);
 943	if (unlikely(!_urb)) {
 944		RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
 945			 "Can't allocate urb. Drop skb!\n");
 946		kfree_skb(skb);
 947		return;
 948	}
 949	_rtl_submit_tx_urb(hw, _urb);
 950}
 951
 952static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,
 953				   struct ieee80211_sta *sta,
 954				   struct sk_buff *skb,
 955				   u16 hw_queue)
 956{
 957	struct rtl_priv *rtlpriv = rtl_priv(hw);
 958	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
 959	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 960	struct rtl_tx_desc *pdesc = NULL;
 961	struct rtl_tcb_desc tcb_desc;
 962	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
 963	__le16 fc = hdr->frame_control;
 964	u8 *pda_addr = hdr->addr1;
 965	/* ssn */
 966	u8 *qc = NULL;
 967	u8 tid = 0;
 968	u16 seq_number = 0;
 969
 970	memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));
 971	if (ieee80211_is_auth(fc)) {
 972		RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");
 973		rtl_ips_nic_on(hw);
 974	}
 975
 976	if (rtlpriv->psc.sw_ps_enabled) {
 977		if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&
 978		    !ieee80211_has_pm(fc))
 979			hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
 980	}
 981
 982	rtl_action_proc(hw, skb, true);
 983	if (is_multicast_ether_addr(pda_addr))
 984		rtlpriv->stats.txbytesmulticast += skb->len;
 985	else if (is_broadcast_ether_addr(pda_addr))
 986		rtlpriv->stats.txbytesbroadcast += skb->len;
 987	else
 988		rtlpriv->stats.txbytesunicast += skb->len;
 989	if (ieee80211_is_data_qos(fc)) {
 990		qc = ieee80211_get_qos_ctl(hdr);
 991		tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK;
 992		seq_number = (le16_to_cpu(hdr->seq_ctrl) &
 993			     IEEE80211_SCTL_SEQ) >> 4;
 994		seq_number += 1;
 995		seq_number <<= 4;
 996	}
 997	rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, info, sta, skb,
 998					hw_queue, &tcb_desc);
 999	if (!ieee80211_has_morefrags(hdr->frame_control)) {
1000		if (qc)
1001			mac->tids[tid].seq_number = seq_number;
1002	}
1003	if (ieee80211_is_data(fc))
1004		rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);
1005}
1006
1007static int rtl_usb_tx(struct ieee80211_hw *hw,
1008		      struct ieee80211_sta *sta,
1009		      struct sk_buff *skb,
1010		      struct rtl_tcb_desc *dummy)
1011{
1012	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1013	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
1014	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
1015	__le16 fc = hdr->frame_control;
1016	u16 hw_queue;
1017
1018	if (unlikely(is_hal_stop(rtlhal)))
1019		goto err_free;
1020	hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));
1021	_rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);
1022	_rtl_usb_transmit(hw, skb, hw_queue);
1023	return NETDEV_TX_OK;
1024
1025err_free:
1026	dev_kfree_skb_any(skb);
1027	return NETDEV_TX_OK;
1028}
1029
1030static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,
1031					struct ieee80211_sta *sta,
1032					struct sk_buff *skb)
1033{
1034	return false;
1035}
1036
1037static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work)
1038{
1039	struct rtl_works *rtlworks =
1040	    container_of(work, struct rtl_works, fill_h2c_cmd);
1041	struct ieee80211_hw *hw = rtlworks->hw;
1042	struct rtl_priv *rtlpriv = rtl_priv(hw);
1043
1044	rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask);
1045}
1046
1047static struct rtl_intf_ops rtl_usb_ops = {
1048	.adapter_start = rtl_usb_start,
1049	.adapter_stop = rtl_usb_stop,
1050	.adapter_tx = rtl_usb_tx,
1051	.waitq_insert = rtl_usb_tx_chk_waitq_insert,
1052};
1053
1054int rtl_usb_probe(struct usb_interface *intf,
1055		  const struct usb_device_id *id,
1056		  struct rtl_hal_cfg *rtl_hal_cfg)
1057{
1058	int err;
1059	struct ieee80211_hw *hw = NULL;
1060	struct rtl_priv *rtlpriv = NULL;
1061	struct usb_device	*udev;
1062	struct rtl_usb_priv *usb_priv;
1063
1064	hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +
1065				sizeof(struct rtl_usb_priv), &rtl_ops);
1066	if (!hw) {
1067		RT_ASSERT(false, "ieee80211 alloc failed\n");
1068		return -ENOMEM;
1069	}
1070	rtlpriv = hw->priv;
1071	rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32),
1072				    GFP_KERNEL);
1073	if (!rtlpriv->usb_data)
1074		return -ENOMEM;
1075
1076	/* this spin lock must be initialized early */
1077	spin_lock_init(&rtlpriv->locks.usb_lock);
1078	INIT_WORK(&rtlpriv->works.fill_h2c_cmd,
1079		  rtl_fill_h2c_cmd_work_callback);
1080	INIT_WORK(&rtlpriv->works.lps_change_work,
1081		  rtl_lps_change_work_callback);
1082
1083	rtlpriv->usb_data_index = 0;
1084	init_completion(&rtlpriv->firmware_loading_complete);
1085	SET_IEEE80211_DEV(hw, &intf->dev);
1086	udev = interface_to_usbdev(intf);
1087	usb_get_dev(udev);
1088	usb_priv = rtl_usbpriv(hw);
1089	memset(usb_priv, 0, sizeof(*usb_priv));
1090	usb_priv->dev.intf = intf;
1091	usb_priv->dev.udev = udev;
1092	usb_set_intfdata(intf, hw);
1093	/* init cfg & intf_ops */
1094	rtlpriv->rtlhal.interface = INTF_USB;
1095	rtlpriv->cfg = rtl_hal_cfg;
1096	rtlpriv->intf_ops = &rtl_usb_ops;
1097	rtl_dbgp_flag_init(hw);
1098	/* Init IO handler */
1099	_rtl_usb_io_handler_init(&udev->dev, hw);
1100	rtlpriv->cfg->ops->read_chip_version(hw);
1101	/*like read eeprom and so on */
1102	rtlpriv->cfg->ops->read_eeprom_info(hw);
1103	err = _rtl_usb_init(hw);
1104	if (err)
1105		goto error_out;
1106	rtl_usb_init_sw(hw);
1107	/* Init mac80211 sw */
1108	err = rtl_init_core(hw);
1109	if (err) {
1110		RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG,
1111			 "Can't allocate sw for mac80211\n");
1112		goto error_out;
1113	}
1114	if (rtlpriv->cfg->ops->init_sw_vars(hw)) {
1115		RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "Can't init_sw_vars\n");
1116		goto error_out;
1117	}
1118	rtlpriv->cfg->ops->init_sw_leds(hw);
1119
1120	return 0;
1121error_out:
1122	rtl_deinit_core(hw);
1123	_rtl_usb_io_handler_release(hw);
1124	usb_put_dev(udev);
1125	complete(&rtlpriv->firmware_loading_complete);
1126	return -ENODEV;
1127}
1128EXPORT_SYMBOL(rtl_usb_probe);
1129
1130void rtl_usb_disconnect(struct usb_interface *intf)
1131{
1132	struct ieee80211_hw *hw = usb_get_intfdata(intf);
1133	struct rtl_priv *rtlpriv = rtl_priv(hw);
1134	struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));
1135	struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));
1136
1137	if (unlikely(!rtlpriv))
1138		return;
1139
1140	/* just in case driver is removed before firmware callback */
1141	wait_for_completion(&rtlpriv->firmware_loading_complete);
1142	/*ieee80211_unregister_hw will call ops_stop */
1143	if (rtlmac->mac80211_registered == 1) {
1144		ieee80211_unregister_hw(hw);
1145		rtlmac->mac80211_registered = 0;
1146	} else {
1147		rtl_deinit_deferred_work(hw);
1148		rtlpriv->intf_ops->adapter_stop(hw);
1149	}
1150	/*deinit rfkill */
1151	/* rtl_deinit_rfkill(hw); */
1152	rtl_usb_deinit(hw);
1153	rtl_deinit_core(hw);
1154	kfree(rtlpriv->usb_data);
1155	rtlpriv->cfg->ops->deinit_sw_leds(hw);
1156	rtlpriv->cfg->ops->deinit_sw_vars(hw);
1157	_rtl_usb_io_handler_release(hw);
1158	usb_put_dev(rtlusb->udev);
1159	usb_set_intfdata(intf, NULL);
1160	ieee80211_free_hw(hw);
1161}
1162EXPORT_SYMBOL(rtl_usb_disconnect);
1163
1164int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)
1165{
1166	return 0;
1167}
1168EXPORT_SYMBOL(rtl_usb_suspend);
1169
1170int rtl_usb_resume(struct usb_interface *pusb_intf)
1171{
1172	return 0;
1173}
1174EXPORT_SYMBOL(rtl_usb_resume);