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1// SPDX-License-Identifier: GPL-2.02/* Copyright(c) 2009-2012 Realtek Corporation.*/3 4#include "wifi.h"5#include "core.h"6#include "usb.h"7#include "base.h"8#include "ps.h"9#include "rtl8192c/fw_common.h"10#include <linux/export.h>11#include <linux/module.h>12 13MODULE_AUTHOR("lizhaoming <chaoming_li@realsil.com.cn>");14MODULE_AUTHOR("Realtek WlanFAE <wlanfae@realtek.com>");15MODULE_AUTHOR("Larry Finger <Larry.FInger@lwfinger.net>");16MODULE_LICENSE("GPL");17MODULE_DESCRIPTION("USB basic driver for rtlwifi");18 19#define REALTEK_USB_VENQT_READ 0xC020#define REALTEK_USB_VENQT_WRITE 0x4021#define REALTEK_USB_VENQT_CMD_REQ 0x0522#define REALTEK_USB_VENQT_CMD_IDX 0x0023 24#define MAX_USBCTRL_VENDORREQ_TIMES 1025 26static void _rtl_usb_cleanup_tx(struct ieee80211_hw *hw);27 28static void _usbctrl_vendorreq_sync(struct usb_device *udev, u8 reqtype,29 u16 value, void *pdata, u16 len)30{31 unsigned int pipe;32 int status;33 int vendorreq_times = 0;34 static int count;35 36 if (reqtype == REALTEK_USB_VENQT_READ)37 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */38 else39 pipe = usb_sndctrlpipe(udev, 0); /* write_out */40 41 do {42 status = usb_control_msg(udev, pipe, REALTEK_USB_VENQT_CMD_REQ,43 reqtype, value, REALTEK_USB_VENQT_CMD_IDX,44 pdata, len, 1000);45 if (status < 0) {46 /* firmware download is checksumed, don't retry */47 if ((value >= FW_8192C_START_ADDRESS &&48 value <= FW_8192C_END_ADDRESS))49 break;50 } else {51 break;52 }53 } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES);54 55 if (status < 0 && count++ < 4)56 dev_err(&udev->dev, "reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x reqtype=0x%x\n",57 value, status, *(u32 *)pdata, reqtype);58}59 60static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len)61{62 struct device *dev = rtlpriv->io.dev;63 struct usb_device *udev = to_usb_device(dev);64 u16 wvalue;65 __le32 *data;66 unsigned long flags;67 68 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);69 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)70 rtlpriv->usb_data_index = 0;71 data = &rtlpriv->usb_data[rtlpriv->usb_data_index];72 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);73 74 wvalue = (u16)addr;75 _usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_READ, wvalue, data, len);76 return le32_to_cpu(*data);77}78 79 80static void _usb_write_sync(struct rtl_priv *rtlpriv, u32 addr, u32 val, u16 len)81{82 struct device *dev = rtlpriv->io.dev;83 struct usb_device *udev = to_usb_device(dev);84 unsigned long flags;85 __le32 *data;86 u16 wvalue;87 88 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags);89 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT)90 rtlpriv->usb_data_index = 0;91 data = &rtlpriv->usb_data[rtlpriv->usb_data_index];92 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags);93 94 wvalue = (u16)(addr & 0x0000ffff);95 *data = cpu_to_le32(val);96 97 _usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_WRITE, wvalue, data, len);98}99 100static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr)101{102 return (u8)_usb_read_sync(rtlpriv, addr, 1);103}104 105static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr)106{107 return (u16)_usb_read_sync(rtlpriv, addr, 2);108}109 110static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr)111{112 return _usb_read_sync(rtlpriv, addr, 4);113}114 115static void _usb_write8_sync(struct rtl_priv *rtlpriv, u32 addr, u8 val)116{117 _usb_write_sync(rtlpriv, addr, val, 1);118}119 120static void _usb_write16_sync(struct rtl_priv *rtlpriv, u32 addr, u16 val)121{122 _usb_write_sync(rtlpriv, addr, val, 2);123}124 125static void _usb_write32_sync(struct rtl_priv *rtlpriv, u32 addr, u32 val)126{127 _usb_write_sync(rtlpriv, addr, val, 4);128}129 130static void _usb_write_chunk_sync(struct rtl_priv *rtlpriv, u32 addr,131 u32 length, u8 *data)132{133 struct usb_device *udev = to_usb_device(rtlpriv->io.dev);134 135 _usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_WRITE, addr, data, length);136}137 138static void _rtl_usb_io_handler_init(struct device *dev,139 struct ieee80211_hw *hw)140{141 struct rtl_priv *rtlpriv = rtl_priv(hw);142 143 rtlpriv->io.dev = dev;144 mutex_init(&rtlpriv->io.bb_mutex);145 rtlpriv->io.write8 = _usb_write8_sync;146 rtlpriv->io.write16 = _usb_write16_sync;147 rtlpriv->io.write32 = _usb_write32_sync;148 rtlpriv->io.write_chunk = _usb_write_chunk_sync;149 rtlpriv->io.read8 = _usb_read8_sync;150 rtlpriv->io.read16 = _usb_read16_sync;151 rtlpriv->io.read32 = _usb_read32_sync;152}153 154static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw)155{156 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw);157 158 mutex_destroy(&rtlpriv->io.bb_mutex);159}160 161/* Default aggregation handler. Do nothing and just return the oldest skb. */162static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw,163 struct sk_buff_head *list)164{165 return skb_dequeue(list);166}167 168#define IS_HIGH_SPEED_USB(udev) \169 ((USB_SPEED_HIGH == (udev)->speed) ? true : false)170 171static int _rtl_usb_init_tx(struct ieee80211_hw *hw)172{173 u32 i;174 struct rtl_priv *rtlpriv = rtl_priv(hw);175 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));176 177 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev)178 ? USB_HIGH_SPEED_BULK_SIZE179 : USB_FULL_SPEED_BULK_SIZE;180 181 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n",182 rtlusb->max_bulk_out_size);183 184 for (i = 0; i < __RTL_TXQ_NUM; i++) {185 u32 ep_num = rtlusb->ep_map.ep_mapping[i];186 187 if (!ep_num) {188 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG,189 "Invalid endpoint map setting!\n");190 return -EINVAL;191 }192 }193 194 rtlusb->usb_tx_post_hdl =195 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl;196 rtlusb->usb_tx_cleanup =197 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup;198 rtlusb->usb_tx_aggregate_hdl =199 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl)200 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl201 : &_none_usb_tx_aggregate_hdl;202 203 init_usb_anchor(&rtlusb->tx_submitted);204 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {205 skb_queue_head_init(&rtlusb->tx_skb_queue[i]);206 init_usb_anchor(&rtlusb->tx_pending[i]);207 }208 return 0;209}210 211static void _rtl_rx_work(struct tasklet_struct *t);212 213static int _rtl_usb_init_rx(struct ieee80211_hw *hw)214{215 struct rtl_priv *rtlpriv = rtl_priv(hw);216 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);217 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);218 219 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size;220 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num;221 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl;222 rtlusb->usb_rx_segregate_hdl =223 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl;224 225 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n",226 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep);227 init_usb_anchor(&rtlusb->rx_submitted);228 init_usb_anchor(&rtlusb->rx_cleanup_urbs);229 230 skb_queue_head_init(&rtlusb->rx_queue);231 tasklet_setup(&rtlusb->rx_work_tasklet, _rtl_rx_work);232 233 return 0;234}235 236static int _rtl_usb_init(struct ieee80211_hw *hw)237{238 struct rtl_priv *rtlpriv = rtl_priv(hw);239 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw);240 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv);241 int err;242 u8 epidx;243 struct usb_interface *usb_intf = rtlusb->intf;244 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints;245 246 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0;247 for (epidx = 0; epidx < epnums; epidx++) {248 struct usb_endpoint_descriptor *pep_desc;249 250 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc;251 252 if (usb_endpoint_dir_in(pep_desc)) {253 if (usb_endpoint_xfer_bulk(pep_desc)) {254 /* The vendor drivers assume there is only one255 * bulk in ep and that it's the first in ep.256 */257 if (rtlusb->in_ep_nums == 0)258 rtlusb->in_ep = usb_endpoint_num(pep_desc);259 else260 pr_warn("%s: bulk in endpoint is not the first in endpoint\n",261 __func__);262 }263 264 rtlusb->in_ep_nums++;265 } else if (usb_endpoint_dir_out(pep_desc)) {266 if (rtlusb->out_ep_nums < RTL_USB_MAX_BULKOUT_NUM) {267 if (usb_endpoint_xfer_bulk(pep_desc))268 rtlusb->out_eps[rtlusb->out_ep_nums] =269 usb_endpoint_num(pep_desc);270 } else {271 pr_warn("%s: found more bulk out endpoints than the expected %d\n",272 __func__, RTL_USB_MAX_BULKOUT_NUM);273 }274 275 rtlusb->out_ep_nums++;276 }277 278 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG,279 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n",280 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize,281 pep_desc->bInterval);282 }283 284 if (rtlusb->out_ep_nums == 0) {285 pr_err("No output end points found\n");286 return -EINVAL;287 }288 /* usb endpoint mapping */289 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw);290 if (err)291 return err;292 293 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq;294 295 err = _rtl_usb_init_tx(hw);296 if (err)297 return err;298 299 err = _rtl_usb_init_rx(hw);300 if (err)301 goto err_out;302 303 return 0;304 305err_out:306 _rtl_usb_cleanup_tx(hw);307 return err;308}309 310static void rtl_usb_init_sw(struct ieee80211_hw *hw)311{312 struct rtl_mac *mac = rtl_mac(rtl_priv(hw));313 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));314 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));315 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));316 317 rtlhal->hw = hw;318 ppsc->inactiveps = false;319 ppsc->leisure_ps = false;320 ppsc->fwctrl_lps = false;321 ppsc->reg_fwctrl_lps = 3;322 ppsc->reg_max_lps_awakeintvl = 5;323 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE;324 325 /* IBSS */326 mac->beacon_interval = 100;327 328 /* AMPDU */329 mac->min_space_cfg = 0;330 mac->max_mss_density = 0;331 332 /* set sane AMPDU defaults */333 mac->current_ampdu_density = 7;334 mac->current_ampdu_factor = 3;335 336 /* QOS */337 rtlusb->acm_method = EACMWAY2_SW;338 339 /* IRQ */340 /* HIMR - turn all on */341 rtlusb->irq_mask[0] = 0xFFFFFFFF;342 /* HIMR_EX - turn all on */343 rtlusb->irq_mask[1] = 0xFFFFFFFF;344 rtlusb->disablehwsm = true;345}346 347static void _rtl_rx_completed(struct urb *urb);348 349static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb,350 struct urb *urb, gfp_t gfp_mask)351{352 void *buf;353 354 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask,355 &urb->transfer_dma);356 if (!buf) {357 pr_err("Failed to usb_alloc_coherent!!\n");358 return -ENOMEM;359 }360 361 usb_fill_bulk_urb(urb, rtlusb->udev,362 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep),363 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb);364 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;365 366 return 0;367}368 369static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw,370 struct sk_buff *skb)371{372 struct rtl_priv *rtlpriv = rtl_priv(hw);373 u8 *rxdesc = skb->data;374 struct ieee80211_hdr *hdr;375 bool unicast = false;376 __le16 fc;377 struct ieee80211_rx_status rx_status = {0};378 struct rtl_stats stats = {379 .signal = 0,380 .rate = 0,381 };382 383 skb_pull(skb, RTL_RX_DESC_SIZE);384 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);385 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));386 hdr = rtl_get_hdr(skb);387 fc = hdr->frame_control;388 if (!stats.crc) {389 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));390 391 if (is_broadcast_ether_addr(hdr->addr1)) {392 /*TODO*/;393 } else if (is_multicast_ether_addr(hdr->addr1)) {394 /*TODO*/395 } else {396 unicast = true;397 rtlpriv->stats.rxbytesunicast += skb->len;398 }399 400 if (ieee80211_is_data(fc)) {401 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);402 403 if (unicast)404 rtlpriv->link_info.num_rx_inperiod++;405 }406 /* static bcn for roaming */407 rtl_beacon_statistic(hw, skb);408 }409}410 411static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw,412 struct sk_buff *skb)413{414 struct rtl_priv *rtlpriv = rtl_priv(hw);415 u8 *rxdesc = skb->data;416 struct ieee80211_hdr *hdr;417 bool unicast = false;418 __le16 fc;419 struct ieee80211_rx_status rx_status = {0};420 struct rtl_stats stats = {421 .signal = 0,422 .rate = 0,423 };424 425 skb_pull(skb, RTL_RX_DESC_SIZE);426 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb);427 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift));428 hdr = rtl_get_hdr(skb);429 fc = hdr->frame_control;430 if (!stats.crc) {431 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));432 433 if (is_broadcast_ether_addr(hdr->addr1)) {434 /*TODO*/;435 } else if (is_multicast_ether_addr(hdr->addr1)) {436 /*TODO*/437 } else {438 unicast = true;439 rtlpriv->stats.rxbytesunicast += skb->len;440 }441 442 if (ieee80211_is_data(fc)) {443 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX);444 445 if (unicast)446 rtlpriv->link_info.num_rx_inperiod++;447 }448 449 /* static bcn for roaming */450 rtl_beacon_statistic(hw, skb);451 452 if (likely(rtl_action_proc(hw, skb, false)))453 ieee80211_rx(hw, skb);454 else455 dev_kfree_skb_any(skb);456 } else {457 dev_kfree_skb_any(skb);458 }459}460 461static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb)462{463 struct sk_buff *_skb;464 struct sk_buff_head rx_queue;465 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));466 467 skb_queue_head_init(&rx_queue);468 if (rtlusb->usb_rx_segregate_hdl)469 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue);470 WARN_ON(skb_queue_empty(&rx_queue));471 while (!skb_queue_empty(&rx_queue)) {472 _skb = skb_dequeue(&rx_queue);473 _rtl_usb_rx_process_agg(hw, _skb);474 ieee80211_rx(hw, _skb);475 }476}477 478#define __RX_SKB_MAX_QUEUED 64479 480static void _rtl_rx_work(struct tasklet_struct *t)481{482 struct rtl_usb *rtlusb = from_tasklet(rtlusb, t, rx_work_tasklet);483 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);484 struct sk_buff *skb;485 486 while ((skb = skb_dequeue(&rtlusb->rx_queue))) {487 if (unlikely(IS_USB_STOP(rtlusb))) {488 dev_kfree_skb_any(skb);489 continue;490 }491 492 if (likely(!rtlusb->usb_rx_segregate_hdl)) {493 _rtl_usb_rx_process_noagg(hw, skb);494 } else {495 /* TO DO */496 _rtl_rx_pre_process(hw, skb);497 pr_err("rx agg not supported\n");498 }499 }500}501 502static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr,503 unsigned int len)504{505#if NET_IP_ALIGN != 0506 unsigned int padding = 0;507#endif508 509 /* make function no-op when possible */510 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr))511 return 0;512 513#if NET_IP_ALIGN != 0514 /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */515 /* TODO: deduplicate common code, define helper function instead? */516 517 if (ieee80211_is_data_qos(hdr->frame_control)) {518 u8 *qc = ieee80211_get_qos_ctl(hdr);519 520 padding ^= NET_IP_ALIGN;521 522 /* Input might be invalid, avoid accessing memory outside523 * the buffer.524 */525 if ((unsigned long)qc - (unsigned long)hdr < len &&526 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT)527 padding ^= NET_IP_ALIGN;528 }529 530 if (ieee80211_has_a4(hdr->frame_control))531 padding ^= NET_IP_ALIGN;532 533 return padding;534#endif535}536 537#define __RADIO_TAP_SIZE_RSV 32538 539static void _rtl_rx_completed(struct urb *_urb)540{541 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context;542 int err = 0;543 544 if (unlikely(IS_USB_STOP(rtlusb)))545 goto free;546 547 if (likely(0 == _urb->status)) {548 unsigned int padding;549 struct sk_buff *skb;550 unsigned int qlen;551 unsigned int size = _urb->actual_length;552 struct ieee80211_hdr *hdr;553 554 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) {555 pr_err("Too short packet from bulk IN! (len: %d)\n",556 size);557 goto resubmit;558 }559 560 qlen = skb_queue_len(&rtlusb->rx_queue);561 if (qlen >= __RX_SKB_MAX_QUEUED) {562 pr_err("Pending RX skbuff queue full! (qlen: %d)\n",563 qlen);564 goto resubmit;565 }566 567 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE);568 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE);569 570 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding);571 if (!skb) {572 pr_err("Can't allocate skb for bulk IN!\n");573 goto resubmit;574 }575 576 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep);577 578 /* Make sure the payload data is 4 byte aligned. */579 skb_reserve(skb, padding);580 581 /* reserve some space for mac80211's radiotap */582 skb_reserve(skb, __RADIO_TAP_SIZE_RSV);583 584 skb_put_data(skb, _urb->transfer_buffer, size);585 586 skb_queue_tail(&rtlusb->rx_queue, skb);587 tasklet_schedule(&rtlusb->rx_work_tasklet);588 589 goto resubmit;590 }591 592 switch (_urb->status) {593 /* disconnect */594 case -ENOENT:595 case -ECONNRESET:596 case -ENODEV:597 case -ESHUTDOWN:598 goto free;599 default:600 break;601 }602 603resubmit:604 usb_anchor_urb(_urb, &rtlusb->rx_submitted);605 err = usb_submit_urb(_urb, GFP_ATOMIC);606 if (unlikely(err)) {607 usb_unanchor_urb(_urb);608 goto free;609 }610 return;611 612free:613 /* On some architectures, usb_free_coherent must not be called from614 * hardirq context. Queue urb to cleanup list.615 */616 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs);617}618 619#undef __RADIO_TAP_SIZE_RSV620 621static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw)622{623 struct rtl_priv *rtlpriv = rtl_priv(hw);624 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));625 struct urb *urb;626 627 usb_kill_anchored_urbs(&rtlusb->rx_submitted);628 629 tasklet_kill(&rtlusb->rx_work_tasklet);630 cancel_work_sync(&rtlpriv->works.lps_change_work);631 632 if (rtlpriv->works.rtl_wq) {633 destroy_workqueue(rtlpriv->works.rtl_wq);634 rtlpriv->works.rtl_wq = NULL;635 }636 637 skb_queue_purge(&rtlusb->rx_queue);638 639 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {640 usb_free_coherent(urb->dev, urb->transfer_buffer_length,641 urb->transfer_buffer, urb->transfer_dma);642 usb_free_urb(urb);643 }644}645 646static int _rtl_usb_receive(struct ieee80211_hw *hw)647{648 struct urb *urb;649 int err;650 int i;651 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));652 653 WARN_ON(0 == rtlusb->rx_urb_num);654 /* 1600 == 1514 + max WLAN header + rtk info */655 WARN_ON(rtlusb->rx_max_size < 1600);656 657 for (i = 0; i < rtlusb->rx_urb_num; i++) {658 err = -ENOMEM;659 urb = usb_alloc_urb(0, GFP_KERNEL);660 if (!urb)661 goto err_out;662 663 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL);664 if (err < 0) {665 pr_err("Failed to prep_rx_urb!!\n");666 usb_free_urb(urb);667 goto err_out;668 }669 670 usb_anchor_urb(urb, &rtlusb->rx_submitted);671 err = usb_submit_urb(urb, GFP_KERNEL);672 if (err) {673 usb_unanchor_urb(urb);674 usb_free_urb(urb);675 goto err_out;676 }677 usb_free_urb(urb);678 }679 return 0;680 681err_out:682 usb_kill_anchored_urbs(&rtlusb->rx_submitted);683 return err;684}685 686static int rtl_usb_start(struct ieee80211_hw *hw)687{688 int err;689 struct rtl_priv *rtlpriv = rtl_priv(hw);690 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));691 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));692 693 err = rtlpriv->cfg->ops->hw_init(hw);694 if (!err) {695 rtl_init_rx_config(hw);696 697 /* Enable software */698 SET_USB_START(rtlusb);699 /* should after adapter start and interrupt enable. */700 set_hal_start(rtlhal);701 702 /* Start bulk IN */703 err = _rtl_usb_receive(hw);704 }705 706 return err;707}708 709/*======================= tx =========================================*/710static void _rtl_usb_cleanup_tx(struct ieee80211_hw *hw)711{712 u32 i;713 struct sk_buff *_skb;714 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));715 struct ieee80211_tx_info *txinfo;716 717 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) {718 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) {719 rtlusb->usb_tx_cleanup(hw, _skb);720 txinfo = IEEE80211_SKB_CB(_skb);721 ieee80211_tx_info_clear_status(txinfo);722 txinfo->flags |= IEEE80211_TX_STAT_ACK;723 ieee80211_tx_status_irqsafe(hw, _skb);724 }725 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]);726 }727 usb_kill_anchored_urbs(&rtlusb->tx_submitted);728}729 730static void rtl_usb_cleanup(struct ieee80211_hw *hw)731{732 _rtl_usb_cleanup_rx(hw);733 _rtl_usb_cleanup_tx(hw);734}735 736/* We may add some struct into struct rtl_usb later. Do deinit here. */737static void rtl_usb_deinit(struct ieee80211_hw *hw)738{739 rtl_usb_cleanup(hw);740}741 742static void rtl_usb_stop(struct ieee80211_hw *hw)743{744 struct rtl_priv *rtlpriv = rtl_priv(hw);745 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));746 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));747 struct urb *urb;748 749 /* should after adapter start and interrupt enable. */750 set_hal_stop(rtlhal);751 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd);752 /* Enable software */753 SET_USB_STOP(rtlusb);754 755 /* free pre-allocated URBs from rtl_usb_start() */756 usb_kill_anchored_urbs(&rtlusb->rx_submitted);757 758 tasklet_kill(&rtlusb->rx_work_tasklet);759 cancel_work_sync(&rtlpriv->works.lps_change_work);760 cancel_work_sync(&rtlpriv->works.update_beacon_work);761 762 flush_workqueue(rtlpriv->works.rtl_wq);763 764 skb_queue_purge(&rtlusb->rx_queue);765 766 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) {767 usb_free_coherent(urb->dev, urb->transfer_buffer_length,768 urb->transfer_buffer, urb->transfer_dma);769 usb_free_urb(urb);770 }771 772 rtlpriv->cfg->ops->hw_disable(hw);773}774 775static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb)776{777 int err;778 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));779 780 usb_anchor_urb(_urb, &rtlusb->tx_submitted);781 err = usb_submit_urb(_urb, GFP_ATOMIC);782 if (err < 0) {783 struct sk_buff *skb;784 785 pr_err("Failed to submit urb\n");786 usb_unanchor_urb(_urb);787 skb = (struct sk_buff *)_urb->context;788 kfree_skb(skb);789 }790 usb_free_urb(_urb);791}792 793static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb,794 struct sk_buff *skb)795{796 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));797 struct ieee80211_tx_info *txinfo;798 799 rtlusb->usb_tx_post_hdl(hw, urb, skb);800 skb_pull(skb, RTL_TX_HEADER_SIZE);801 txinfo = IEEE80211_SKB_CB(skb);802 ieee80211_tx_info_clear_status(txinfo);803 txinfo->flags |= IEEE80211_TX_STAT_ACK;804 805 if (urb->status) {806 pr_err("Urb has error status 0x%X\n", urb->status);807 goto out;808 }809 /* TODO: statistics */810out:811 ieee80211_tx_status_irqsafe(hw, skb);812 return urb->status;813}814 815static void _rtl_tx_complete(struct urb *urb)816{817 struct sk_buff *skb = (struct sk_buff *)urb->context;818 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);819 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0];820 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf);821 int err;822 823 if (unlikely(IS_USB_STOP(rtlusb)))824 return;825 err = _usb_tx_post(hw, urb, skb);826 if (err) {827 /* Ignore error and keep issuiing other urbs */828 return;829 }830}831 832static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw,833 struct sk_buff *skb, u32 ep_num)834{835 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));836 struct urb *_urb;837 838 WARN_ON(NULL == skb);839 _urb = usb_alloc_urb(0, GFP_ATOMIC);840 if (!_urb)841 return NULL;842 _rtl_install_trx_info(rtlusb, skb, ep_num);843 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev,844 ep_num), skb->data, skb->len, _rtl_tx_complete, skb);845 _urb->transfer_flags |= URB_ZERO_PACKET;846 return _urb;847}848 849static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb,850 enum rtl_txq qnum)851{852 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));853 u32 ep_num;854 struct urb *_urb = NULL;855 856 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl);857 if (unlikely(IS_USB_STOP(rtlusb))) {858 pr_err("USB device is stopping...\n");859 kfree_skb(skb);860 return;861 }862 ep_num = rtlusb->ep_map.ep_mapping[qnum];863 _urb = _rtl_usb_tx_urb_setup(hw, skb, ep_num);864 if (unlikely(!_urb)) {865 pr_err("Can't allocate urb. Drop skb!\n");866 kfree_skb(skb);867 return;868 }869 _rtl_submit_tx_urb(hw, _urb);870}871 872static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw,873 struct ieee80211_sta *sta,874 struct sk_buff *skb,875 u16 hw_queue)876{877 struct rtl_priv *rtlpriv = rtl_priv(hw);878 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);879 struct rtl_tx_desc *pdesc = NULL;880 struct rtl_tcb_desc tcb_desc;881 struct ieee80211_hdr *hdr = rtl_get_hdr(skb);882 __le16 fc = hdr->frame_control;883 u8 *pda_addr = hdr->addr1;884 885 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc));886 if (ieee80211_is_auth(fc)) {887 rtl_dbg(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n");888 }889 890 if (rtlpriv->psc.sw_ps_enabled) {891 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) &&892 !ieee80211_has_pm(fc))893 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);894 }895 896 rtl_action_proc(hw, skb, true);897 if (is_multicast_ether_addr(pda_addr))898 rtlpriv->stats.txbytesmulticast += skb->len;899 else if (is_broadcast_ether_addr(pda_addr))900 rtlpriv->stats.txbytesbroadcast += skb->len;901 else902 rtlpriv->stats.txbytesunicast += skb->len;903 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb,904 hw_queue, &tcb_desc);905 if (ieee80211_is_data(fc))906 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX);907}908 909static int rtl_usb_tx(struct ieee80211_hw *hw,910 struct ieee80211_sta *sta,911 struct sk_buff *skb,912 struct rtl_tcb_desc *dummy)913{914 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));915 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));916 struct ieee80211_hdr *hdr = rtl_get_hdr(skb);917 __le16 fc = hdr->frame_control;918 u16 hw_queue;919 920 if (unlikely(is_hal_stop(rtlhal)))921 goto err_free;922 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb));923 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue);924 _rtl_usb_transmit(hw, skb, hw_queue);925 return NETDEV_TX_OK;926 927err_free:928 dev_kfree_skb_any(skb);929 return NETDEV_TX_OK;930}931 932static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw,933 struct ieee80211_sta *sta,934 struct sk_buff *skb)935{936 return false;937}938 939static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work)940{941 struct rtl_works *rtlworks =942 container_of(work, struct rtl_works, fill_h2c_cmd);943 struct ieee80211_hw *hw = rtlworks->hw;944 struct rtl_priv *rtlpriv = rtl_priv(hw);945 946 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask);947}948 949static const struct rtl_intf_ops rtl_usb_ops = {950 .adapter_start = rtl_usb_start,951 .adapter_stop = rtl_usb_stop,952 .adapter_tx = rtl_usb_tx,953 .waitq_insert = rtl_usb_tx_chk_waitq_insert,954};955 956int rtl_usb_probe(struct usb_interface *intf,957 const struct usb_device_id *id,958 const struct rtl_hal_cfg *rtl_hal_cfg)959{960 int err;961 struct ieee80211_hw *hw = NULL;962 struct rtl_priv *rtlpriv = NULL;963 struct usb_device *udev;964 struct rtl_usb_priv *usb_priv;965 966 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) +967 sizeof(struct rtl_usb_priv), &rtl_ops);968 if (!hw) {969 pr_warn("rtl_usb: ieee80211 alloc failed\n");970 return -ENOMEM;971 }972 rtlpriv = hw->priv;973 rtlpriv->hw = hw;974 rtlpriv->usb_data = kcalloc(RTL_USB_MAX_RX_COUNT, sizeof(u32),975 GFP_KERNEL);976 if (!rtlpriv->usb_data) {977 ieee80211_free_hw(hw);978 return -ENOMEM;979 }980 981 /* this spin lock must be initialized early */982 spin_lock_init(&rtlpriv->locks.usb_lock);983 INIT_WORK(&rtlpriv->works.fill_h2c_cmd,984 rtl_fill_h2c_cmd_work_callback);985 INIT_WORK(&rtlpriv->works.lps_change_work,986 rtl_lps_change_work_callback);987 INIT_WORK(&rtlpriv->works.update_beacon_work,988 rtl_update_beacon_work_callback);989 990 rtlpriv->usb_data_index = 0;991 init_completion(&rtlpriv->firmware_loading_complete);992 SET_IEEE80211_DEV(hw, &intf->dev);993 udev = interface_to_usbdev(intf);994 usb_get_dev(udev);995 usb_priv = rtl_usbpriv(hw);996 memset(usb_priv, 0, sizeof(*usb_priv));997 usb_priv->dev.intf = intf;998 usb_priv->dev.udev = udev;999 usb_set_intfdata(intf, hw);1000 /* For dual MAC RTL8192DU, which has two interfaces. */1001 rtlpriv->rtlhal.interfaceindex =1002 intf->altsetting[0].desc.bInterfaceNumber;1003 /* init cfg & intf_ops */1004 rtlpriv->rtlhal.interface = INTF_USB;1005 rtlpriv->cfg = rtl_hal_cfg;1006 rtlpriv->intf_ops = &rtl_usb_ops;1007 /* Init IO handler */1008 _rtl_usb_io_handler_init(&udev->dev, hw);1009 rtlpriv->cfg->ops->read_chip_version(hw);1010 /*like read eeprom and so on */1011 rtlpriv->cfg->ops->read_eeprom_info(hw);1012 err = _rtl_usb_init(hw);1013 if (err)1014 goto error_out2;1015 rtl_usb_init_sw(hw);1016 /* Init mac80211 sw */1017 err = rtl_init_core(hw);1018 if (err) {1019 pr_err("Can't allocate sw for mac80211\n");1020 goto error_out2;1021 }1022 if (rtlpriv->cfg->ops->init_sw_vars(hw)) {1023 pr_err("Can't init_sw_vars\n");1024 goto error_out;1025 }1026 rtl_init_sw_leds(hw);1027 1028 err = ieee80211_register_hw(hw);1029 if (err) {1030 pr_err("Can't register mac80211 hw.\n");1031 goto error_out;1032 }1033 rtlpriv->mac80211.mac80211_registered = 1;1034 1035 set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);1036 return 0;1037 1038error_out:1039 rtl_deinit_core(hw);1040error_out2:1041 _rtl_usb_io_handler_release(hw);1042 usb_put_dev(udev);1043 complete(&rtlpriv->firmware_loading_complete);1044 kfree(rtlpriv->usb_data);1045 ieee80211_free_hw(hw);1046 return -ENODEV;1047}1048EXPORT_SYMBOL(rtl_usb_probe);1049 1050void rtl_usb_disconnect(struct usb_interface *intf)1051{1052 struct ieee80211_hw *hw = usb_get_intfdata(intf);1053 struct rtl_priv *rtlpriv = rtl_priv(hw);1054 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw));1055 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw));1056 1057 if (unlikely(!rtlpriv))1058 return;1059 /* just in case driver is removed before firmware callback */1060 wait_for_completion(&rtlpriv->firmware_loading_complete);1061 clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status);1062 /*ieee80211_unregister_hw will call ops_stop */1063 if (rtlmac->mac80211_registered == 1) {1064 ieee80211_unregister_hw(hw);1065 rtlmac->mac80211_registered = 0;1066 } else {1067 rtl_deinit_deferred_work(hw, false);1068 rtlpriv->intf_ops->adapter_stop(hw);1069 }1070 /*deinit rfkill */1071 /* rtl_deinit_rfkill(hw); */1072 rtl_usb_deinit(hw);1073 rtl_deinit_core(hw);1074 kfree(rtlpriv->usb_data);1075 rtlpriv->cfg->ops->deinit_sw_vars(hw);1076 _rtl_usb_io_handler_release(hw);1077 usb_put_dev(rtlusb->udev);1078 usb_set_intfdata(intf, NULL);1079 ieee80211_free_hw(hw);1080}1081EXPORT_SYMBOL(rtl_usb_disconnect);1082 1083int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message)1084{1085 return 0;1086}1087EXPORT_SYMBOL(rtl_usb_suspend);1088 1089int rtl_usb_resume(struct usb_interface *pusb_intf)1090{1091 return 0;1092}1093EXPORT_SYMBOL(rtl_usb_resume);1094