1 // SPDX-License-Identifier: GPL-2.0 2 /* 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 13 MODULE_AUTHOR("lizhaoming <chaoming_li@realsil.com.cn>"); 14 MODULE_AUTHOR("Realtek WlanFAE <wlanfae@realtek.com>"); 15 MODULE_AUTHOR("Larry Finger <Larry.FInger@lwfinger.net>"); 16 MODULE_LICENSE("GPL"); 17 MODULE_DESCRIPTION("USB basic driver for rtlwifi"); 18 19 #define REALTEK_USB_VENQT_READ 0xC0 20 #define REALTEK_USB_VENQT_WRITE 0x40 21 #define REALTEK_USB_VENQT_CMD_REQ 0x05 22 #define REALTEK_USB_VENQT_CMD_IDX 0x00 23 24 #define MAX_USBCTRL_VENDORREQ_TIMES 10 25 26 static void _usbctrl_vendorreq_sync(struct usb_device *udev, u8 reqtype, 27 u16 value, void *pdata, u16 len) 28 { 29 unsigned int pipe; 30 int status; 31 int vendorreq_times = 0; 32 static int count; 33 34 if (reqtype == REALTEK_USB_VENQT_READ) 35 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */ 36 else 37 pipe = usb_sndctrlpipe(udev, 0); /* write_out */ 38 39 do { 40 status = usb_control_msg(udev, pipe, REALTEK_USB_VENQT_CMD_REQ, 41 reqtype, value, REALTEK_USB_VENQT_CMD_IDX, 42 pdata, len, 1000); 43 if (status < 0) { 44 /* firmware download is checksumed, don't retry */ 45 if ((value >= FW_8192C_START_ADDRESS && 46 value <= FW_8192C_END_ADDRESS)) 47 break; 48 } else { 49 break; 50 } 51 } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES); 52 53 if (status < 0 && count++ < 4) 54 dev_err(&udev->dev, "reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x reqtype=0x%x\n", 55 value, status, *(u32 *)pdata, reqtype); 56 } 57 58 static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len) 59 { 60 struct device *dev = rtlpriv->io.dev; 61 struct usb_device *udev = to_usb_device(dev); 62 u16 wvalue; 63 __le32 *data; 64 unsigned long flags; 65 66 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags); 67 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT) 68 rtlpriv->usb_data_index = 0; 69 data = &rtlpriv->usb_data[rtlpriv->usb_data_index]; 70 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags); 71 72 wvalue = (u16)addr; 73 _usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_READ, wvalue, data, len); 74 return le32_to_cpu(*data); 75 } 76 77 78 static void _usb_write_sync(struct rtl_priv *rtlpriv, u32 addr, u32 val, u16 len) 79 { 80 struct device *dev = rtlpriv->io.dev; 81 struct usb_device *udev = to_usb_device(dev); 82 unsigned long flags; 83 __le32 *data; 84 u16 wvalue; 85 86 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags); 87 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT) 88 rtlpriv->usb_data_index = 0; 89 data = &rtlpriv->usb_data[rtlpriv->usb_data_index]; 90 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags); 91 92 wvalue = (u16)(addr & 0x0000ffff); 93 *data = cpu_to_le32(val); 94 95 _usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_WRITE, wvalue, data, len); 96 } 97 98 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr) 99 { 100 return (u8)_usb_read_sync(rtlpriv, addr, 1); 101 } 102 103 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr) 104 { 105 return (u16)_usb_read_sync(rtlpriv, addr, 2); 106 } 107 108 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr) 109 { 110 return _usb_read_sync(rtlpriv, addr, 4); 111 } 112 113 static void _usb_write8_sync(struct rtl_priv *rtlpriv, u32 addr, u8 val) 114 { 115 _usb_write_sync(rtlpriv, addr, val, 1); 116 } 117 118 static void _usb_write16_sync(struct rtl_priv *rtlpriv, u32 addr, u16 val) 119 { 120 _usb_write_sync(rtlpriv, addr, val, 2); 121 } 122 123 static void _usb_write32_sync(struct rtl_priv *rtlpriv, u32 addr, u32 val) 124 { 125 _usb_write_sync(rtlpriv, addr, val, 4); 126 } 127 128 static void _usb_write_chunk_sync(struct rtl_priv *rtlpriv, u32 addr, 129 u32 length, u8 *data) 130 { 131 struct usb_device *udev = to_usb_device(rtlpriv->io.dev); 132 133 _usbctrl_vendorreq_sync(udev, REALTEK_USB_VENQT_WRITE, addr, data, length); 134 } 135 136 static void _rtl_usb_io_handler_init(struct device *dev, 137 struct ieee80211_hw *hw) 138 { 139 struct rtl_priv *rtlpriv = rtl_priv(hw); 140 141 rtlpriv->io.dev = dev; 142 mutex_init(&rtlpriv->io.bb_mutex); 143 rtlpriv->io.write8 = _usb_write8_sync; 144 rtlpriv->io.write16 = _usb_write16_sync; 145 rtlpriv->io.write32 = _usb_write32_sync; 146 rtlpriv->io.write_chunk = _usb_write_chunk_sync; 147 rtlpriv->io.read8 = _usb_read8_sync; 148 rtlpriv->io.read16 = _usb_read16_sync; 149 rtlpriv->io.read32 = _usb_read32_sync; 150 } 151 152 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw) 153 { 154 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw); 155 156 mutex_destroy(&rtlpriv->io.bb_mutex); 157 } 158 159 /* Default aggregation handler. Do nothing and just return the oldest skb. */ 160 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw, 161 struct sk_buff_head *list) 162 { 163 return skb_dequeue(list); 164 } 165 166 #define IS_HIGH_SPEED_USB(udev) \ 167 ((USB_SPEED_HIGH == (udev)->speed) ? true : false) 168 169 static int _rtl_usb_init_tx(struct ieee80211_hw *hw) 170 { 171 u32 i; 172 struct rtl_priv *rtlpriv = rtl_priv(hw); 173 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 174 175 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev) 176 ? USB_HIGH_SPEED_BULK_SIZE 177 : USB_FULL_SPEED_BULK_SIZE; 178 179 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n", 180 rtlusb->max_bulk_out_size); 181 182 for (i = 0; i < __RTL_TXQ_NUM; i++) { 183 u32 ep_num = rtlusb->ep_map.ep_mapping[i]; 184 185 if (!ep_num) { 186 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG, 187 "Invalid endpoint map setting!\n"); 188 return -EINVAL; 189 } 190 } 191 192 rtlusb->usb_tx_post_hdl = 193 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl; 194 rtlusb->usb_tx_cleanup = 195 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup; 196 rtlusb->usb_tx_aggregate_hdl = 197 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl) 198 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl 199 : &_none_usb_tx_aggregate_hdl; 200 201 init_usb_anchor(&rtlusb->tx_submitted); 202 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) { 203 skb_queue_head_init(&rtlusb->tx_skb_queue[i]); 204 init_usb_anchor(&rtlusb->tx_pending[i]); 205 } 206 return 0; 207 } 208 209 static void _rtl_rx_work(struct tasklet_struct *t); 210 211 static int _rtl_usb_init_rx(struct ieee80211_hw *hw) 212 { 213 struct rtl_priv *rtlpriv = rtl_priv(hw); 214 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw); 215 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv); 216 217 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size; 218 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num; 219 rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num; 220 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl; 221 rtlusb->usb_rx_segregate_hdl = 222 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl; 223 224 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n", 225 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep); 226 init_usb_anchor(&rtlusb->rx_submitted); 227 init_usb_anchor(&rtlusb->rx_cleanup_urbs); 228 229 skb_queue_head_init(&rtlusb->rx_queue); 230 tasklet_setup(&rtlusb->rx_work_tasklet, _rtl_rx_work); 231 232 return 0; 233 } 234 235 static int _rtl_usb_init(struct ieee80211_hw *hw) 236 { 237 struct rtl_priv *rtlpriv = rtl_priv(hw); 238 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw); 239 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv); 240 int err; 241 u8 epidx; 242 struct usb_interface *usb_intf = rtlusb->intf; 243 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints; 244 245 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0; 246 for (epidx = 0; epidx < epnums; epidx++) { 247 struct usb_endpoint_descriptor *pep_desc; 248 249 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc; 250 251 if (usb_endpoint_dir_in(pep_desc)) 252 rtlusb->in_ep_nums++; 253 else if (usb_endpoint_dir_out(pep_desc)) 254 rtlusb->out_ep_nums++; 255 256 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG, 257 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n", 258 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize, 259 pep_desc->bInterval); 260 } 261 if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num) { 262 pr_err("Too few input end points found\n"); 263 return -EINVAL; 264 } 265 if (rtlusb->out_ep_nums == 0) { 266 pr_err("No output end points found\n"); 267 return -EINVAL; 268 } 269 /* usb endpoint mapping */ 270 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw); 271 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq; 272 _rtl_usb_init_tx(hw); 273 _rtl_usb_init_rx(hw); 274 return err; 275 } 276 277 static void rtl_usb_init_sw(struct ieee80211_hw *hw) 278 { 279 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 280 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 281 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 282 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 283 284 rtlhal->hw = hw; 285 ppsc->inactiveps = false; 286 ppsc->leisure_ps = false; 287 ppsc->fwctrl_lps = false; 288 ppsc->reg_fwctrl_lps = 3; 289 ppsc->reg_max_lps_awakeintvl = 5; 290 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE; 291 292 /* IBSS */ 293 mac->beacon_interval = 100; 294 295 /* AMPDU */ 296 mac->min_space_cfg = 0; 297 mac->max_mss_density = 0; 298 299 /* set sane AMPDU defaults */ 300 mac->current_ampdu_density = 7; 301 mac->current_ampdu_factor = 3; 302 303 /* QOS */ 304 rtlusb->acm_method = EACMWAY2_SW; 305 306 /* IRQ */ 307 /* HIMR - turn all on */ 308 rtlusb->irq_mask[0] = 0xFFFFFFFF; 309 /* HIMR_EX - turn all on */ 310 rtlusb->irq_mask[1] = 0xFFFFFFFF; 311 rtlusb->disablehwsm = true; 312 } 313 314 static void _rtl_rx_completed(struct urb *urb); 315 316 static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb, 317 struct urb *urb, gfp_t gfp_mask) 318 { 319 void *buf; 320 321 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask, 322 &urb->transfer_dma); 323 if (!buf) { 324 pr_err("Failed to usb_alloc_coherent!!\n"); 325 return -ENOMEM; 326 } 327 328 usb_fill_bulk_urb(urb, rtlusb->udev, 329 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep), 330 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb); 331 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 332 333 return 0; 334 } 335 336 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw, 337 struct sk_buff *skb) 338 { 339 struct rtl_priv *rtlpriv = rtl_priv(hw); 340 u8 *rxdesc = skb->data; 341 struct ieee80211_hdr *hdr; 342 bool unicast = false; 343 __le16 fc; 344 struct ieee80211_rx_status rx_status = {0}; 345 struct rtl_stats stats = { 346 .signal = 0, 347 .rate = 0, 348 }; 349 350 skb_pull(skb, RTL_RX_DESC_SIZE); 351 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb); 352 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift)); 353 hdr = rtl_get_hdr(skb); 354 fc = hdr->frame_control; 355 if (!stats.crc) { 356 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 357 358 if (is_broadcast_ether_addr(hdr->addr1)) { 359 /*TODO*/; 360 } else if (is_multicast_ether_addr(hdr->addr1)) { 361 /*TODO*/ 362 } else { 363 unicast = true; 364 rtlpriv->stats.rxbytesunicast += skb->len; 365 } 366 367 if (ieee80211_is_data(fc)) { 368 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX); 369 370 if (unicast) 371 rtlpriv->link_info.num_rx_inperiod++; 372 } 373 /* static bcn for roaming */ 374 rtl_beacon_statistic(hw, skb); 375 } 376 } 377 378 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw, 379 struct sk_buff *skb) 380 { 381 struct rtl_priv *rtlpriv = rtl_priv(hw); 382 u8 *rxdesc = skb->data; 383 struct ieee80211_hdr *hdr; 384 bool unicast = false; 385 __le16 fc; 386 struct ieee80211_rx_status rx_status = {0}; 387 struct rtl_stats stats = { 388 .signal = 0, 389 .rate = 0, 390 }; 391 392 skb_pull(skb, RTL_RX_DESC_SIZE); 393 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb); 394 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift)); 395 hdr = rtl_get_hdr(skb); 396 fc = hdr->frame_control; 397 if (!stats.crc) { 398 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 399 400 if (is_broadcast_ether_addr(hdr->addr1)) { 401 /*TODO*/; 402 } else if (is_multicast_ether_addr(hdr->addr1)) { 403 /*TODO*/ 404 } else { 405 unicast = true; 406 rtlpriv->stats.rxbytesunicast += skb->len; 407 } 408 409 if (ieee80211_is_data(fc)) { 410 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX); 411 412 if (unicast) 413 rtlpriv->link_info.num_rx_inperiod++; 414 } 415 416 /* static bcn for roaming */ 417 rtl_beacon_statistic(hw, skb); 418 419 if (likely(rtl_action_proc(hw, skb, false))) 420 ieee80211_rx(hw, skb); 421 else 422 dev_kfree_skb_any(skb); 423 } else { 424 dev_kfree_skb_any(skb); 425 } 426 } 427 428 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb) 429 { 430 struct sk_buff *_skb; 431 struct sk_buff_head rx_queue; 432 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 433 434 skb_queue_head_init(&rx_queue); 435 if (rtlusb->usb_rx_segregate_hdl) 436 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue); 437 WARN_ON(skb_queue_empty(&rx_queue)); 438 while (!skb_queue_empty(&rx_queue)) { 439 _skb = skb_dequeue(&rx_queue); 440 _rtl_usb_rx_process_agg(hw, _skb); 441 ieee80211_rx(hw, _skb); 442 } 443 } 444 445 #define __RX_SKB_MAX_QUEUED 64 446 447 static void _rtl_rx_work(struct tasklet_struct *t) 448 { 449 struct rtl_usb *rtlusb = from_tasklet(rtlusb, t, rx_work_tasklet); 450 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 451 struct sk_buff *skb; 452 453 while ((skb = skb_dequeue(&rtlusb->rx_queue))) { 454 if (unlikely(IS_USB_STOP(rtlusb))) { 455 dev_kfree_skb_any(skb); 456 continue; 457 } 458 459 if (likely(!rtlusb->usb_rx_segregate_hdl)) { 460 _rtl_usb_rx_process_noagg(hw, skb); 461 } else { 462 /* TO DO */ 463 _rtl_rx_pre_process(hw, skb); 464 pr_err("rx agg not supported\n"); 465 } 466 } 467 } 468 469 static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr, 470 unsigned int len) 471 { 472 #if NET_IP_ALIGN != 0 473 unsigned int padding = 0; 474 #endif 475 476 /* make function no-op when possible */ 477 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr)) 478 return 0; 479 480 #if NET_IP_ALIGN != 0 481 /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */ 482 /* TODO: deduplicate common code, define helper function instead? */ 483 484 if (ieee80211_is_data_qos(hdr->frame_control)) { 485 u8 *qc = ieee80211_get_qos_ctl(hdr); 486 487 padding ^= NET_IP_ALIGN; 488 489 /* Input might be invalid, avoid accessing memory outside 490 * the buffer. 491 */ 492 if ((unsigned long)qc - (unsigned long)hdr < len && 493 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 494 padding ^= NET_IP_ALIGN; 495 } 496 497 if (ieee80211_has_a4(hdr->frame_control)) 498 padding ^= NET_IP_ALIGN; 499 500 return padding; 501 #endif 502 } 503 504 #define __RADIO_TAP_SIZE_RSV 32 505 506 static void _rtl_rx_completed(struct urb *_urb) 507 { 508 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context; 509 int err = 0; 510 511 if (unlikely(IS_USB_STOP(rtlusb))) 512 goto free; 513 514 if (likely(0 == _urb->status)) { 515 unsigned int padding; 516 struct sk_buff *skb; 517 unsigned int qlen; 518 unsigned int size = _urb->actual_length; 519 struct ieee80211_hdr *hdr; 520 521 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) { 522 pr_err("Too short packet from bulk IN! (len: %d)\n", 523 size); 524 goto resubmit; 525 } 526 527 qlen = skb_queue_len(&rtlusb->rx_queue); 528 if (qlen >= __RX_SKB_MAX_QUEUED) { 529 pr_err("Pending RX skbuff queue full! (qlen: %d)\n", 530 qlen); 531 goto resubmit; 532 } 533 534 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE); 535 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE); 536 537 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding); 538 if (!skb) { 539 pr_err("Can't allocate skb for bulk IN!\n"); 540 goto resubmit; 541 } 542 543 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep); 544 545 /* Make sure the payload data is 4 byte aligned. */ 546 skb_reserve(skb, padding); 547 548 /* reserve some space for mac80211's radiotap */ 549 skb_reserve(skb, __RADIO_TAP_SIZE_RSV); 550 551 skb_put_data(skb, _urb->transfer_buffer, size); 552 553 skb_queue_tail(&rtlusb->rx_queue, skb); 554 tasklet_schedule(&rtlusb->rx_work_tasklet); 555 556 goto resubmit; 557 } 558 559 switch (_urb->status) { 560 /* disconnect */ 561 case -ENOENT: 562 case -ECONNRESET: 563 case -ENODEV: 564 case -ESHUTDOWN: 565 goto free; 566 default: 567 break; 568 } 569 570 resubmit: 571 usb_anchor_urb(_urb, &rtlusb->rx_submitted); 572 err = usb_submit_urb(_urb, GFP_ATOMIC); 573 if (unlikely(err)) { 574 usb_unanchor_urb(_urb); 575 goto free; 576 } 577 return; 578 579 free: 580 /* On some architectures, usb_free_coherent must not be called from 581 * hardirq context. Queue urb to cleanup list. 582 */ 583 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs); 584 } 585 586 #undef __RADIO_TAP_SIZE_RSV 587 588 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw) 589 { 590 struct rtl_priv *rtlpriv = rtl_priv(hw); 591 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 592 struct urb *urb; 593 594 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 595 596 tasklet_kill(&rtlusb->rx_work_tasklet); 597 cancel_work_sync(&rtlpriv->works.lps_change_work); 598 599 if (rtlpriv->works.rtl_wq) { 600 destroy_workqueue(rtlpriv->works.rtl_wq); 601 rtlpriv->works.rtl_wq = NULL; 602 } 603 604 skb_queue_purge(&rtlusb->rx_queue); 605 606 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { 607 usb_free_coherent(urb->dev, urb->transfer_buffer_length, 608 urb->transfer_buffer, urb->transfer_dma); 609 usb_free_urb(urb); 610 } 611 } 612 613 static int _rtl_usb_receive(struct ieee80211_hw *hw) 614 { 615 struct urb *urb; 616 int err; 617 int i; 618 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 619 620 WARN_ON(0 == rtlusb->rx_urb_num); 621 /* 1600 == 1514 + max WLAN header + rtk info */ 622 WARN_ON(rtlusb->rx_max_size < 1600); 623 624 for (i = 0; i < rtlusb->rx_urb_num; i++) { 625 err = -ENOMEM; 626 urb = usb_alloc_urb(0, GFP_KERNEL); 627 if (!urb) 628 goto err_out; 629 630 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL); 631 if (err < 0) { 632 pr_err("Failed to prep_rx_urb!!\n"); 633 usb_free_urb(urb); 634 goto err_out; 635 } 636 637 usb_anchor_urb(urb, &rtlusb->rx_submitted); 638 err = usb_submit_urb(urb, GFP_KERNEL); 639 if (err) { 640 usb_unanchor_urb(urb); 641 usb_free_urb(urb); 642 goto err_out; 643 } 644 usb_free_urb(urb); 645 } 646 return 0; 647 648 err_out: 649 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 650 return err; 651 } 652 653 static int rtl_usb_start(struct ieee80211_hw *hw) 654 { 655 int err; 656 struct rtl_priv *rtlpriv = rtl_priv(hw); 657 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 658 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 659 660 err = rtlpriv->cfg->ops->hw_init(hw); 661 if (!err) { 662 rtl_init_rx_config(hw); 663 664 /* Enable software */ 665 SET_USB_START(rtlusb); 666 /* should after adapter start and interrupt enable. */ 667 set_hal_start(rtlhal); 668 669 /* Start bulk IN */ 670 err = _rtl_usb_receive(hw); 671 } 672 673 return err; 674 } 675 676 /*======================= tx =========================================*/ 677 static void rtl_usb_cleanup(struct ieee80211_hw *hw) 678 { 679 u32 i; 680 struct sk_buff *_skb; 681 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 682 struct ieee80211_tx_info *txinfo; 683 684 /* clean up rx stuff. */ 685 _rtl_usb_cleanup_rx(hw); 686 687 /* clean up tx stuff */ 688 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) { 689 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) { 690 rtlusb->usb_tx_cleanup(hw, _skb); 691 txinfo = IEEE80211_SKB_CB(_skb); 692 ieee80211_tx_info_clear_status(txinfo); 693 txinfo->flags |= IEEE80211_TX_STAT_ACK; 694 ieee80211_tx_status_irqsafe(hw, _skb); 695 } 696 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]); 697 } 698 usb_kill_anchored_urbs(&rtlusb->tx_submitted); 699 } 700 701 /* We may add some struct into struct rtl_usb later. Do deinit here. */ 702 static void rtl_usb_deinit(struct ieee80211_hw *hw) 703 { 704 rtl_usb_cleanup(hw); 705 } 706 707 static void rtl_usb_stop(struct ieee80211_hw *hw) 708 { 709 struct rtl_priv *rtlpriv = rtl_priv(hw); 710 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 711 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 712 struct urb *urb; 713 714 /* should after adapter start and interrupt enable. */ 715 set_hal_stop(rtlhal); 716 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd); 717 /* Enable software */ 718 SET_USB_STOP(rtlusb); 719 720 /* free pre-allocated URBs from rtl_usb_start() */ 721 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 722 723 tasklet_kill(&rtlusb->rx_work_tasklet); 724 cancel_work_sync(&rtlpriv->works.lps_change_work); 725 cancel_work_sync(&rtlpriv->works.update_beacon_work); 726 727 flush_workqueue(rtlpriv->works.rtl_wq); 728 729 skb_queue_purge(&rtlusb->rx_queue); 730 731 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { 732 usb_free_coherent(urb->dev, urb->transfer_buffer_length, 733 urb->transfer_buffer, urb->transfer_dma); 734 usb_free_urb(urb); 735 } 736 737 rtlpriv->cfg->ops->hw_disable(hw); 738 } 739 740 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb) 741 { 742 int err; 743 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 744 745 usb_anchor_urb(_urb, &rtlusb->tx_submitted); 746 err = usb_submit_urb(_urb, GFP_ATOMIC); 747 if (err < 0) { 748 struct sk_buff *skb; 749 750 pr_err("Failed to submit urb\n"); 751 usb_unanchor_urb(_urb); 752 skb = (struct sk_buff *)_urb->context; 753 kfree_skb(skb); 754 } 755 usb_free_urb(_urb); 756 } 757 758 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb, 759 struct sk_buff *skb) 760 { 761 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 762 struct ieee80211_tx_info *txinfo; 763 764 rtlusb->usb_tx_post_hdl(hw, urb, skb); 765 skb_pull(skb, RTL_TX_HEADER_SIZE); 766 txinfo = IEEE80211_SKB_CB(skb); 767 ieee80211_tx_info_clear_status(txinfo); 768 txinfo->flags |= IEEE80211_TX_STAT_ACK; 769 770 if (urb->status) { 771 pr_err("Urb has error status 0x%X\n", urb->status); 772 goto out; 773 } 774 /* TODO: statistics */ 775 out: 776 ieee80211_tx_status_irqsafe(hw, skb); 777 return urb->status; 778 } 779 780 static void _rtl_tx_complete(struct urb *urb) 781 { 782 struct sk_buff *skb = (struct sk_buff *)urb->context; 783 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 784 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0]; 785 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 786 int err; 787 788 if (unlikely(IS_USB_STOP(rtlusb))) 789 return; 790 err = _usb_tx_post(hw, urb, skb); 791 if (err) { 792 /* Ignore error and keep issuiing other urbs */ 793 return; 794 } 795 } 796 797 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw, 798 struct sk_buff *skb, u32 ep_num) 799 { 800 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 801 struct urb *_urb; 802 803 WARN_ON(NULL == skb); 804 _urb = usb_alloc_urb(0, GFP_ATOMIC); 805 if (!_urb) 806 return NULL; 807 _rtl_install_trx_info(rtlusb, skb, ep_num); 808 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev, 809 ep_num), skb->data, skb->len, _rtl_tx_complete, skb); 810 _urb->transfer_flags |= URB_ZERO_PACKET; 811 return _urb; 812 } 813 814 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb, 815 enum rtl_txq qnum) 816 { 817 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 818 u32 ep_num; 819 struct urb *_urb = NULL; 820 821 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl); 822 if (unlikely(IS_USB_STOP(rtlusb))) { 823 pr_err("USB device is stopping...\n"); 824 kfree_skb(skb); 825 return; 826 } 827 ep_num = rtlusb->ep_map.ep_mapping[qnum]; 828 _urb = _rtl_usb_tx_urb_setup(hw, skb, ep_num); 829 if (unlikely(!_urb)) { 830 pr_err("Can't allocate urb. Drop skb!\n"); 831 kfree_skb(skb); 832 return; 833 } 834 _rtl_submit_tx_urb(hw, _urb); 835 } 836 837 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw, 838 struct ieee80211_sta *sta, 839 struct sk_buff *skb, 840 u16 hw_queue) 841 { 842 struct rtl_priv *rtlpriv = rtl_priv(hw); 843 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 844 struct rtl_tx_desc *pdesc = NULL; 845 struct rtl_tcb_desc tcb_desc; 846 struct ieee80211_hdr *hdr = rtl_get_hdr(skb); 847 __le16 fc = hdr->frame_control; 848 u8 *pda_addr = hdr->addr1; 849 850 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc)); 851 if (ieee80211_is_auth(fc)) { 852 rtl_dbg(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n"); 853 } 854 855 if (rtlpriv->psc.sw_ps_enabled) { 856 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) && 857 !ieee80211_has_pm(fc)) 858 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 859 } 860 861 rtl_action_proc(hw, skb, true); 862 if (is_multicast_ether_addr(pda_addr)) 863 rtlpriv->stats.txbytesmulticast += skb->len; 864 else if (is_broadcast_ether_addr(pda_addr)) 865 rtlpriv->stats.txbytesbroadcast += skb->len; 866 else 867 rtlpriv->stats.txbytesunicast += skb->len; 868 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb, 869 hw_queue, &tcb_desc); 870 if (ieee80211_is_data(fc)) 871 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX); 872 } 873 874 static int rtl_usb_tx(struct ieee80211_hw *hw, 875 struct ieee80211_sta *sta, 876 struct sk_buff *skb, 877 struct rtl_tcb_desc *dummy) 878 { 879 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 880 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 881 struct ieee80211_hdr *hdr = rtl_get_hdr(skb); 882 __le16 fc = hdr->frame_control; 883 u16 hw_queue; 884 885 if (unlikely(is_hal_stop(rtlhal))) 886 goto err_free; 887 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb)); 888 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue); 889 _rtl_usb_transmit(hw, skb, hw_queue); 890 return NETDEV_TX_OK; 891 892 err_free: 893 dev_kfree_skb_any(skb); 894 return NETDEV_TX_OK; 895 } 896 897 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw, 898 struct ieee80211_sta *sta, 899 struct sk_buff *skb) 900 { 901 return false; 902 } 903 904 static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work) 905 { 906 struct rtl_works *rtlworks = 907 container_of(work, struct rtl_works, fill_h2c_cmd); 908 struct ieee80211_hw *hw = rtlworks->hw; 909 struct rtl_priv *rtlpriv = rtl_priv(hw); 910 911 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask); 912 } 913 914 static const struct rtl_intf_ops rtl_usb_ops = { 915 .adapter_start = rtl_usb_start, 916 .adapter_stop = rtl_usb_stop, 917 .adapter_tx = rtl_usb_tx, 918 .waitq_insert = rtl_usb_tx_chk_waitq_insert, 919 }; 920 921 int rtl_usb_probe(struct usb_interface *intf, 922 const struct usb_device_id *id, 923 struct rtl_hal_cfg *rtl_hal_cfg) 924 { 925 int err; 926 struct ieee80211_hw *hw = NULL; 927 struct rtl_priv *rtlpriv = NULL; 928 struct usb_device *udev; 929 struct rtl_usb_priv *usb_priv; 930 931 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) + 932 sizeof(struct rtl_usb_priv), &rtl_ops); 933 if (!hw) { 934 pr_warn("rtl_usb: ieee80211 alloc failed\n"); 935 return -ENOMEM; 936 } 937 rtlpriv = hw->priv; 938 rtlpriv->hw = hw; 939 rtlpriv->usb_data = kcalloc(RTL_USB_MAX_RX_COUNT, sizeof(u32), 940 GFP_KERNEL); 941 if (!rtlpriv->usb_data) { 942 ieee80211_free_hw(hw); 943 return -ENOMEM; 944 } 945 946 /* this spin lock must be initialized early */ 947 spin_lock_init(&rtlpriv->locks.usb_lock); 948 INIT_WORK(&rtlpriv->works.fill_h2c_cmd, 949 rtl_fill_h2c_cmd_work_callback); 950 INIT_WORK(&rtlpriv->works.lps_change_work, 951 rtl_lps_change_work_callback); 952 INIT_WORK(&rtlpriv->works.update_beacon_work, 953 rtl_update_beacon_work_callback); 954 955 rtlpriv->usb_data_index = 0; 956 init_completion(&rtlpriv->firmware_loading_complete); 957 SET_IEEE80211_DEV(hw, &intf->dev); 958 udev = interface_to_usbdev(intf); 959 usb_get_dev(udev); 960 usb_priv = rtl_usbpriv(hw); 961 memset(usb_priv, 0, sizeof(*usb_priv)); 962 usb_priv->dev.intf = intf; 963 usb_priv->dev.udev = udev; 964 usb_set_intfdata(intf, hw); 965 /* init cfg & intf_ops */ 966 rtlpriv->rtlhal.interface = INTF_USB; 967 rtlpriv->cfg = rtl_hal_cfg; 968 rtlpriv->intf_ops = &rtl_usb_ops; 969 /* Init IO handler */ 970 _rtl_usb_io_handler_init(&udev->dev, hw); 971 rtlpriv->cfg->ops->read_chip_version(hw); 972 /*like read eeprom and so on */ 973 rtlpriv->cfg->ops->read_eeprom_info(hw); 974 err = _rtl_usb_init(hw); 975 if (err) 976 goto error_out2; 977 rtl_usb_init_sw(hw); 978 /* Init mac80211 sw */ 979 err = rtl_init_core(hw); 980 if (err) { 981 pr_err("Can't allocate sw for mac80211\n"); 982 goto error_out2; 983 } 984 if (rtlpriv->cfg->ops->init_sw_vars(hw)) { 985 pr_err("Can't init_sw_vars\n"); 986 goto error_out; 987 } 988 rtl_init_sw_leds(hw); 989 990 err = ieee80211_register_hw(hw); 991 if (err) { 992 pr_err("Can't register mac80211 hw.\n"); 993 goto error_out; 994 } 995 rtlpriv->mac80211.mac80211_registered = 1; 996 997 set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status); 998 return 0; 999 1000 error_out: 1001 rtl_deinit_core(hw); 1002 error_out2: 1003 _rtl_usb_io_handler_release(hw); 1004 usb_put_dev(udev); 1005 complete(&rtlpriv->firmware_loading_complete); 1006 kfree(rtlpriv->usb_data); 1007 ieee80211_free_hw(hw); 1008 return -ENODEV; 1009 } 1010 EXPORT_SYMBOL(rtl_usb_probe); 1011 1012 void rtl_usb_disconnect(struct usb_interface *intf) 1013 { 1014 struct ieee80211_hw *hw = usb_get_intfdata(intf); 1015 struct rtl_priv *rtlpriv = rtl_priv(hw); 1016 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw)); 1017 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 1018 1019 if (unlikely(!rtlpriv)) 1020 return; 1021 /* just in case driver is removed before firmware callback */ 1022 wait_for_completion(&rtlpriv->firmware_loading_complete); 1023 clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status); 1024 /*ieee80211_unregister_hw will call ops_stop */ 1025 if (rtlmac->mac80211_registered == 1) { 1026 ieee80211_unregister_hw(hw); 1027 rtlmac->mac80211_registered = 0; 1028 } else { 1029 rtl_deinit_deferred_work(hw, false); 1030 rtlpriv->intf_ops->adapter_stop(hw); 1031 } 1032 /*deinit rfkill */ 1033 /* rtl_deinit_rfkill(hw); */ 1034 rtl_usb_deinit(hw); 1035 rtl_deinit_core(hw); 1036 kfree(rtlpriv->usb_data); 1037 rtlpriv->cfg->ops->deinit_sw_vars(hw); 1038 _rtl_usb_io_handler_release(hw); 1039 usb_put_dev(rtlusb->udev); 1040 usb_set_intfdata(intf, NULL); 1041 ieee80211_free_hw(hw); 1042 } 1043 EXPORT_SYMBOL(rtl_usb_disconnect); 1044 1045 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message) 1046 { 1047 return 0; 1048 } 1049 EXPORT_SYMBOL(rtl_usb_suspend); 1050 1051 int rtl_usb_resume(struct usb_interface *pusb_intf) 1052 { 1053 return 0; 1054 } 1055 EXPORT_SYMBOL(rtl_usb_resume); 1056