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_async_callback(struct urb *urb) 27 { 28 if (urb) { 29 /* free dr */ 30 kfree(urb->setup_packet); 31 /* free databuf */ 32 kfree(urb->transfer_buffer); 33 } 34 } 35 36 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request, 37 u16 value, u16 index, void *pdata, 38 u16 len) 39 { 40 int rc; 41 unsigned int pipe; 42 u8 reqtype; 43 struct usb_ctrlrequest *dr; 44 struct urb *urb; 45 const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE; 46 u8 *databuf; 47 48 if (WARN_ON_ONCE(len > databuf_maxlen)) 49 len = databuf_maxlen; 50 51 pipe = usb_sndctrlpipe(udev, 0); /* write_out */ 52 reqtype = REALTEK_USB_VENQT_WRITE; 53 54 dr = kzalloc(sizeof(*dr), GFP_ATOMIC); 55 if (!dr) 56 return -ENOMEM; 57 58 databuf = kzalloc(databuf_maxlen, GFP_ATOMIC); 59 if (!databuf) { 60 kfree(dr); 61 return -ENOMEM; 62 } 63 64 urb = usb_alloc_urb(0, GFP_ATOMIC); 65 if (!urb) { 66 kfree(databuf); 67 kfree(dr); 68 return -ENOMEM; 69 } 70 71 dr->bRequestType = reqtype; 72 dr->bRequest = request; 73 dr->wValue = cpu_to_le16(value); 74 dr->wIndex = cpu_to_le16(index); 75 dr->wLength = cpu_to_le16(len); 76 /* data are already in little-endian order */ 77 memcpy(databuf, pdata, len); 78 usb_fill_control_urb(urb, udev, pipe, 79 (unsigned char *)dr, databuf, len, 80 usbctrl_async_callback, NULL); 81 rc = usb_submit_urb(urb, GFP_ATOMIC); 82 if (rc < 0) { 83 kfree(databuf); 84 kfree(dr); 85 } 86 usb_free_urb(urb); 87 return rc; 88 } 89 90 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request, 91 u16 value, u16 index, void *pdata, 92 u16 len) 93 { 94 unsigned int pipe; 95 int status; 96 u8 reqtype; 97 int vendorreq_times = 0; 98 static int count; 99 100 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */ 101 reqtype = REALTEK_USB_VENQT_READ; 102 103 do { 104 status = usb_control_msg(udev, pipe, request, reqtype, value, 105 index, pdata, len, 1000); 106 if (status < 0) { 107 /* firmware download is checksumed, don't retry */ 108 if ((value >= FW_8192C_START_ADDRESS && 109 value <= FW_8192C_END_ADDRESS)) 110 break; 111 } else { 112 break; 113 } 114 } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES); 115 116 if (status < 0 && count++ < 4) 117 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n", 118 value, status, *(u32 *)pdata); 119 return status; 120 } 121 122 static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len) 123 { 124 struct device *dev = rtlpriv->io.dev; 125 struct usb_device *udev = to_usb_device(dev); 126 u8 request; 127 u16 wvalue; 128 u16 index; 129 __le32 *data; 130 unsigned long flags; 131 132 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags); 133 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT) 134 rtlpriv->usb_data_index = 0; 135 data = &rtlpriv->usb_data[rtlpriv->usb_data_index]; 136 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags); 137 request = REALTEK_USB_VENQT_CMD_REQ; 138 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */ 139 140 wvalue = (u16)addr; 141 _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len); 142 return le32_to_cpu(*data); 143 } 144 145 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr) 146 { 147 return (u8)_usb_read_sync(rtlpriv, addr, 1); 148 } 149 150 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr) 151 { 152 return (u16)_usb_read_sync(rtlpriv, addr, 2); 153 } 154 155 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr) 156 { 157 return _usb_read_sync(rtlpriv, addr, 4); 158 } 159 160 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val, 161 u16 len) 162 { 163 u8 request; 164 u16 wvalue; 165 u16 index; 166 __le32 data; 167 int ret; 168 169 request = REALTEK_USB_VENQT_CMD_REQ; 170 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */ 171 wvalue = (u16)(addr&0x0000ffff); 172 data = cpu_to_le32(val); 173 174 ret = _usbctrl_vendorreq_async_write(udev, request, wvalue, 175 index, &data, len); 176 if (ret < 0) 177 dev_err(&udev->dev, "error %d writing at 0x%x\n", ret, addr); 178 } 179 180 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val) 181 { 182 struct device *dev = rtlpriv->io.dev; 183 184 _usb_write_async(to_usb_device(dev), addr, val, 1); 185 } 186 187 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val) 188 { 189 struct device *dev = rtlpriv->io.dev; 190 191 _usb_write_async(to_usb_device(dev), addr, val, 2); 192 } 193 194 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val) 195 { 196 struct device *dev = rtlpriv->io.dev; 197 198 _usb_write_async(to_usb_device(dev), addr, val, 4); 199 } 200 201 static void _rtl_usb_io_handler_init(struct device *dev, 202 struct ieee80211_hw *hw) 203 { 204 struct rtl_priv *rtlpriv = rtl_priv(hw); 205 206 rtlpriv->io.dev = dev; 207 mutex_init(&rtlpriv->io.bb_mutex); 208 rtlpriv->io.write8_async = _usb_write8_async; 209 rtlpriv->io.write16_async = _usb_write16_async; 210 rtlpriv->io.write32_async = _usb_write32_async; 211 rtlpriv->io.read8_sync = _usb_read8_sync; 212 rtlpriv->io.read16_sync = _usb_read16_sync; 213 rtlpriv->io.read32_sync = _usb_read32_sync; 214 } 215 216 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw) 217 { 218 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw); 219 220 mutex_destroy(&rtlpriv->io.bb_mutex); 221 } 222 223 /* Default aggregation handler. Do nothing and just return the oldest skb. */ 224 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw, 225 struct sk_buff_head *list) 226 { 227 return skb_dequeue(list); 228 } 229 230 #define IS_HIGH_SPEED_USB(udev) \ 231 ((USB_SPEED_HIGH == (udev)->speed) ? true : false) 232 233 static int _rtl_usb_init_tx(struct ieee80211_hw *hw) 234 { 235 u32 i; 236 struct rtl_priv *rtlpriv = rtl_priv(hw); 237 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 238 239 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev) 240 ? USB_HIGH_SPEED_BULK_SIZE 241 : USB_FULL_SPEED_BULK_SIZE; 242 243 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n", 244 rtlusb->max_bulk_out_size); 245 246 for (i = 0; i < __RTL_TXQ_NUM; i++) { 247 u32 ep_num = rtlusb->ep_map.ep_mapping[i]; 248 249 if (!ep_num) { 250 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG, 251 "Invalid endpoint map setting!\n"); 252 return -EINVAL; 253 } 254 } 255 256 rtlusb->usb_tx_post_hdl = 257 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl; 258 rtlusb->usb_tx_cleanup = 259 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup; 260 rtlusb->usb_tx_aggregate_hdl = 261 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl) 262 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl 263 : &_none_usb_tx_aggregate_hdl; 264 265 init_usb_anchor(&rtlusb->tx_submitted); 266 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) { 267 skb_queue_head_init(&rtlusb->tx_skb_queue[i]); 268 init_usb_anchor(&rtlusb->tx_pending[i]); 269 } 270 return 0; 271 } 272 273 static void _rtl_rx_work(struct tasklet_struct *t); 274 275 static int _rtl_usb_init_rx(struct ieee80211_hw *hw) 276 { 277 struct rtl_priv *rtlpriv = rtl_priv(hw); 278 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw); 279 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv); 280 281 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size; 282 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num; 283 rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num; 284 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl; 285 rtlusb->usb_rx_segregate_hdl = 286 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl; 287 288 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n", 289 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep); 290 init_usb_anchor(&rtlusb->rx_submitted); 291 init_usb_anchor(&rtlusb->rx_cleanup_urbs); 292 293 skb_queue_head_init(&rtlusb->rx_queue); 294 tasklet_setup(&rtlusb->rx_work_tasklet, _rtl_rx_work); 295 296 return 0; 297 } 298 299 static int _rtl_usb_init(struct ieee80211_hw *hw) 300 { 301 struct rtl_priv *rtlpriv = rtl_priv(hw); 302 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw); 303 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv); 304 int err; 305 u8 epidx; 306 struct usb_interface *usb_intf = rtlusb->intf; 307 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints; 308 309 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0; 310 for (epidx = 0; epidx < epnums; epidx++) { 311 struct usb_endpoint_descriptor *pep_desc; 312 313 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc; 314 315 if (usb_endpoint_dir_in(pep_desc)) 316 rtlusb->in_ep_nums++; 317 else if (usb_endpoint_dir_out(pep_desc)) 318 rtlusb->out_ep_nums++; 319 320 rtl_dbg(rtlpriv, COMP_INIT, DBG_DMESG, 321 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n", 322 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize, 323 pep_desc->bInterval); 324 } 325 if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num) { 326 pr_err("Too few input end points found\n"); 327 return -EINVAL; 328 } 329 if (rtlusb->out_ep_nums == 0) { 330 pr_err("No output end points found\n"); 331 return -EINVAL; 332 } 333 /* usb endpoint mapping */ 334 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw); 335 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq; 336 _rtl_usb_init_tx(hw); 337 _rtl_usb_init_rx(hw); 338 return err; 339 } 340 341 static void rtl_usb_init_sw(struct ieee80211_hw *hw) 342 { 343 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 344 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 345 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 346 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 347 348 rtlhal->hw = hw; 349 ppsc->inactiveps = false; 350 ppsc->leisure_ps = false; 351 ppsc->fwctrl_lps = false; 352 ppsc->reg_fwctrl_lps = 3; 353 ppsc->reg_max_lps_awakeintvl = 5; 354 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE; 355 356 /* IBSS */ 357 mac->beacon_interval = 100; 358 359 /* AMPDU */ 360 mac->min_space_cfg = 0; 361 mac->max_mss_density = 0; 362 363 /* set sane AMPDU defaults */ 364 mac->current_ampdu_density = 7; 365 mac->current_ampdu_factor = 3; 366 367 /* QOS */ 368 rtlusb->acm_method = EACMWAY2_SW; 369 370 /* IRQ */ 371 /* HIMR - turn all on */ 372 rtlusb->irq_mask[0] = 0xFFFFFFFF; 373 /* HIMR_EX - turn all on */ 374 rtlusb->irq_mask[1] = 0xFFFFFFFF; 375 rtlusb->disablehwsm = true; 376 } 377 378 static void _rtl_rx_completed(struct urb *urb); 379 380 static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb, 381 struct urb *urb, gfp_t gfp_mask) 382 { 383 void *buf; 384 385 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask, 386 &urb->transfer_dma); 387 if (!buf) { 388 pr_err("Failed to usb_alloc_coherent!!\n"); 389 return -ENOMEM; 390 } 391 392 usb_fill_bulk_urb(urb, rtlusb->udev, 393 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep), 394 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb); 395 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 396 397 return 0; 398 } 399 400 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw, 401 struct sk_buff *skb) 402 { 403 struct rtl_priv *rtlpriv = rtl_priv(hw); 404 u8 *rxdesc = skb->data; 405 struct ieee80211_hdr *hdr; 406 bool unicast = false; 407 __le16 fc; 408 struct ieee80211_rx_status rx_status = {0}; 409 struct rtl_stats stats = { 410 .signal = 0, 411 .rate = 0, 412 }; 413 414 skb_pull(skb, RTL_RX_DESC_SIZE); 415 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb); 416 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift)); 417 hdr = rtl_get_hdr(skb); 418 fc = hdr->frame_control; 419 if (!stats.crc) { 420 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 421 422 if (is_broadcast_ether_addr(hdr->addr1)) { 423 /*TODO*/; 424 } else if (is_multicast_ether_addr(hdr->addr1)) { 425 /*TODO*/ 426 } else { 427 unicast = true; 428 rtlpriv->stats.rxbytesunicast += skb->len; 429 } 430 431 if (ieee80211_is_data(fc)) { 432 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX); 433 434 if (unicast) 435 rtlpriv->link_info.num_rx_inperiod++; 436 } 437 /* static bcn for roaming */ 438 rtl_beacon_statistic(hw, skb); 439 } 440 } 441 442 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw, 443 struct sk_buff *skb) 444 { 445 struct rtl_priv *rtlpriv = rtl_priv(hw); 446 u8 *rxdesc = skb->data; 447 struct ieee80211_hdr *hdr; 448 bool unicast = false; 449 __le16 fc; 450 struct ieee80211_rx_status rx_status = {0}; 451 struct rtl_stats stats = { 452 .signal = 0, 453 .rate = 0, 454 }; 455 456 skb_pull(skb, RTL_RX_DESC_SIZE); 457 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb); 458 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift)); 459 hdr = rtl_get_hdr(skb); 460 fc = hdr->frame_control; 461 if (!stats.crc) { 462 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 463 464 if (is_broadcast_ether_addr(hdr->addr1)) { 465 /*TODO*/; 466 } else if (is_multicast_ether_addr(hdr->addr1)) { 467 /*TODO*/ 468 } else { 469 unicast = true; 470 rtlpriv->stats.rxbytesunicast += skb->len; 471 } 472 473 if (ieee80211_is_data(fc)) { 474 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX); 475 476 if (unicast) 477 rtlpriv->link_info.num_rx_inperiod++; 478 } 479 480 /* static bcn for roaming */ 481 rtl_beacon_statistic(hw, skb); 482 483 if (likely(rtl_action_proc(hw, skb, false))) 484 ieee80211_rx(hw, skb); 485 else 486 dev_kfree_skb_any(skb); 487 } else { 488 dev_kfree_skb_any(skb); 489 } 490 } 491 492 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb) 493 { 494 struct sk_buff *_skb; 495 struct sk_buff_head rx_queue; 496 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 497 498 skb_queue_head_init(&rx_queue); 499 if (rtlusb->usb_rx_segregate_hdl) 500 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue); 501 WARN_ON(skb_queue_empty(&rx_queue)); 502 while (!skb_queue_empty(&rx_queue)) { 503 _skb = skb_dequeue(&rx_queue); 504 _rtl_usb_rx_process_agg(hw, _skb); 505 ieee80211_rx(hw, _skb); 506 } 507 } 508 509 #define __RX_SKB_MAX_QUEUED 64 510 511 static void _rtl_rx_work(struct tasklet_struct *t) 512 { 513 struct rtl_usb *rtlusb = from_tasklet(rtlusb, t, rx_work_tasklet); 514 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 515 struct sk_buff *skb; 516 517 while ((skb = skb_dequeue(&rtlusb->rx_queue))) { 518 if (unlikely(IS_USB_STOP(rtlusb))) { 519 dev_kfree_skb_any(skb); 520 continue; 521 } 522 523 if (likely(!rtlusb->usb_rx_segregate_hdl)) { 524 _rtl_usb_rx_process_noagg(hw, skb); 525 } else { 526 /* TO DO */ 527 _rtl_rx_pre_process(hw, skb); 528 pr_err("rx agg not supported\n"); 529 } 530 } 531 } 532 533 static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr, 534 unsigned int len) 535 { 536 #if NET_IP_ALIGN != 0 537 unsigned int padding = 0; 538 #endif 539 540 /* make function no-op when possible */ 541 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr)) 542 return 0; 543 544 #if NET_IP_ALIGN != 0 545 /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */ 546 /* TODO: deduplicate common code, define helper function instead? */ 547 548 if (ieee80211_is_data_qos(hdr->frame_control)) { 549 u8 *qc = ieee80211_get_qos_ctl(hdr); 550 551 padding ^= NET_IP_ALIGN; 552 553 /* Input might be invalid, avoid accessing memory outside 554 * the buffer. 555 */ 556 if ((unsigned long)qc - (unsigned long)hdr < len && 557 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 558 padding ^= NET_IP_ALIGN; 559 } 560 561 if (ieee80211_has_a4(hdr->frame_control)) 562 padding ^= NET_IP_ALIGN; 563 564 return padding; 565 #endif 566 } 567 568 #define __RADIO_TAP_SIZE_RSV 32 569 570 static void _rtl_rx_completed(struct urb *_urb) 571 { 572 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context; 573 int err = 0; 574 575 if (unlikely(IS_USB_STOP(rtlusb))) 576 goto free; 577 578 if (likely(0 == _urb->status)) { 579 unsigned int padding; 580 struct sk_buff *skb; 581 unsigned int qlen; 582 unsigned int size = _urb->actual_length; 583 struct ieee80211_hdr *hdr; 584 585 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) { 586 pr_err("Too short packet from bulk IN! (len: %d)\n", 587 size); 588 goto resubmit; 589 } 590 591 qlen = skb_queue_len(&rtlusb->rx_queue); 592 if (qlen >= __RX_SKB_MAX_QUEUED) { 593 pr_err("Pending RX skbuff queue full! (qlen: %d)\n", 594 qlen); 595 goto resubmit; 596 } 597 598 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE); 599 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE); 600 601 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding); 602 if (!skb) { 603 pr_err("Can't allocate skb for bulk IN!\n"); 604 goto resubmit; 605 } 606 607 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep); 608 609 /* Make sure the payload data is 4 byte aligned. */ 610 skb_reserve(skb, padding); 611 612 /* reserve some space for mac80211's radiotap */ 613 skb_reserve(skb, __RADIO_TAP_SIZE_RSV); 614 615 skb_put_data(skb, _urb->transfer_buffer, size); 616 617 skb_queue_tail(&rtlusb->rx_queue, skb); 618 tasklet_schedule(&rtlusb->rx_work_tasklet); 619 620 goto resubmit; 621 } 622 623 switch (_urb->status) { 624 /* disconnect */ 625 case -ENOENT: 626 case -ECONNRESET: 627 case -ENODEV: 628 case -ESHUTDOWN: 629 goto free; 630 default: 631 break; 632 } 633 634 resubmit: 635 usb_anchor_urb(_urb, &rtlusb->rx_submitted); 636 err = usb_submit_urb(_urb, GFP_ATOMIC); 637 if (unlikely(err)) { 638 usb_unanchor_urb(_urb); 639 goto free; 640 } 641 return; 642 643 free: 644 /* On some architectures, usb_free_coherent must not be called from 645 * hardirq context. Queue urb to cleanup list. 646 */ 647 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs); 648 } 649 650 #undef __RADIO_TAP_SIZE_RSV 651 652 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw) 653 { 654 struct rtl_priv *rtlpriv = rtl_priv(hw); 655 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 656 struct urb *urb; 657 658 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 659 660 tasklet_kill(&rtlusb->rx_work_tasklet); 661 cancel_work_sync(&rtlpriv->works.lps_change_work); 662 663 if (rtlpriv->works.rtl_wq) { 664 destroy_workqueue(rtlpriv->works.rtl_wq); 665 rtlpriv->works.rtl_wq = NULL; 666 } 667 668 skb_queue_purge(&rtlusb->rx_queue); 669 670 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { 671 usb_free_coherent(urb->dev, urb->transfer_buffer_length, 672 urb->transfer_buffer, urb->transfer_dma); 673 usb_free_urb(urb); 674 } 675 } 676 677 static int _rtl_usb_receive(struct ieee80211_hw *hw) 678 { 679 struct urb *urb; 680 int err; 681 int i; 682 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 683 684 WARN_ON(0 == rtlusb->rx_urb_num); 685 /* 1600 == 1514 + max WLAN header + rtk info */ 686 WARN_ON(rtlusb->rx_max_size < 1600); 687 688 for (i = 0; i < rtlusb->rx_urb_num; i++) { 689 err = -ENOMEM; 690 urb = usb_alloc_urb(0, GFP_KERNEL); 691 if (!urb) 692 goto err_out; 693 694 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL); 695 if (err < 0) { 696 pr_err("Failed to prep_rx_urb!!\n"); 697 usb_free_urb(urb); 698 goto err_out; 699 } 700 701 usb_anchor_urb(urb, &rtlusb->rx_submitted); 702 err = usb_submit_urb(urb, GFP_KERNEL); 703 if (err) { 704 usb_unanchor_urb(urb); 705 usb_free_urb(urb); 706 goto err_out; 707 } 708 usb_free_urb(urb); 709 } 710 return 0; 711 712 err_out: 713 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 714 return err; 715 } 716 717 static int rtl_usb_start(struct ieee80211_hw *hw) 718 { 719 int err; 720 struct rtl_priv *rtlpriv = rtl_priv(hw); 721 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 722 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 723 724 err = rtlpriv->cfg->ops->hw_init(hw); 725 if (!err) { 726 rtl_init_rx_config(hw); 727 728 /* Enable software */ 729 SET_USB_START(rtlusb); 730 /* should after adapter start and interrupt enable. */ 731 set_hal_start(rtlhal); 732 733 /* Start bulk IN */ 734 err = _rtl_usb_receive(hw); 735 } 736 737 return err; 738 } 739 740 /*======================= tx =========================================*/ 741 static void rtl_usb_cleanup(struct ieee80211_hw *hw) 742 { 743 u32 i; 744 struct sk_buff *_skb; 745 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 746 struct ieee80211_tx_info *txinfo; 747 748 /* clean up rx stuff. */ 749 _rtl_usb_cleanup_rx(hw); 750 751 /* clean up tx stuff */ 752 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) { 753 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) { 754 rtlusb->usb_tx_cleanup(hw, _skb); 755 txinfo = IEEE80211_SKB_CB(_skb); 756 ieee80211_tx_info_clear_status(txinfo); 757 txinfo->flags |= IEEE80211_TX_STAT_ACK; 758 ieee80211_tx_status_irqsafe(hw, _skb); 759 } 760 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]); 761 } 762 usb_kill_anchored_urbs(&rtlusb->tx_submitted); 763 } 764 765 /* We may add some struct into struct rtl_usb later. Do deinit here. */ 766 static void rtl_usb_deinit(struct ieee80211_hw *hw) 767 { 768 rtl_usb_cleanup(hw); 769 } 770 771 static void rtl_usb_stop(struct ieee80211_hw *hw) 772 { 773 struct rtl_priv *rtlpriv = rtl_priv(hw); 774 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 775 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 776 struct urb *urb; 777 778 /* should after adapter start and interrupt enable. */ 779 set_hal_stop(rtlhal); 780 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd); 781 /* Enable software */ 782 SET_USB_STOP(rtlusb); 783 784 /* free pre-allocated URBs from rtl_usb_start() */ 785 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 786 787 tasklet_kill(&rtlusb->rx_work_tasklet); 788 cancel_work_sync(&rtlpriv->works.lps_change_work); 789 cancel_work_sync(&rtlpriv->works.update_beacon_work); 790 791 flush_workqueue(rtlpriv->works.rtl_wq); 792 793 skb_queue_purge(&rtlusb->rx_queue); 794 795 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { 796 usb_free_coherent(urb->dev, urb->transfer_buffer_length, 797 urb->transfer_buffer, urb->transfer_dma); 798 usb_free_urb(urb); 799 } 800 801 rtlpriv->cfg->ops->hw_disable(hw); 802 } 803 804 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb) 805 { 806 int err; 807 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 808 809 usb_anchor_urb(_urb, &rtlusb->tx_submitted); 810 err = usb_submit_urb(_urb, GFP_ATOMIC); 811 if (err < 0) { 812 struct sk_buff *skb; 813 814 pr_err("Failed to submit urb\n"); 815 usb_unanchor_urb(_urb); 816 skb = (struct sk_buff *)_urb->context; 817 kfree_skb(skb); 818 } 819 usb_free_urb(_urb); 820 } 821 822 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb, 823 struct sk_buff *skb) 824 { 825 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 826 struct ieee80211_tx_info *txinfo; 827 828 rtlusb->usb_tx_post_hdl(hw, urb, skb); 829 skb_pull(skb, RTL_TX_HEADER_SIZE); 830 txinfo = IEEE80211_SKB_CB(skb); 831 ieee80211_tx_info_clear_status(txinfo); 832 txinfo->flags |= IEEE80211_TX_STAT_ACK; 833 834 if (urb->status) { 835 pr_err("Urb has error status 0x%X\n", urb->status); 836 goto out; 837 } 838 /* TODO: statistics */ 839 out: 840 ieee80211_tx_status_irqsafe(hw, skb); 841 return urb->status; 842 } 843 844 static void _rtl_tx_complete(struct urb *urb) 845 { 846 struct sk_buff *skb = (struct sk_buff *)urb->context; 847 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 848 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0]; 849 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 850 int err; 851 852 if (unlikely(IS_USB_STOP(rtlusb))) 853 return; 854 err = _usb_tx_post(hw, urb, skb); 855 if (err) { 856 /* Ignore error and keep issuiing other urbs */ 857 return; 858 } 859 } 860 861 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw, 862 struct sk_buff *skb, u32 ep_num) 863 { 864 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 865 struct urb *_urb; 866 867 WARN_ON(NULL == skb); 868 _urb = usb_alloc_urb(0, GFP_ATOMIC); 869 if (!_urb) 870 return NULL; 871 _rtl_install_trx_info(rtlusb, skb, ep_num); 872 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev, 873 ep_num), skb->data, skb->len, _rtl_tx_complete, skb); 874 _urb->transfer_flags |= URB_ZERO_PACKET; 875 return _urb; 876 } 877 878 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb, 879 enum rtl_txq qnum) 880 { 881 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 882 u32 ep_num; 883 struct urb *_urb = NULL; 884 885 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl); 886 if (unlikely(IS_USB_STOP(rtlusb))) { 887 pr_err("USB device is stopping...\n"); 888 kfree_skb(skb); 889 return; 890 } 891 ep_num = rtlusb->ep_map.ep_mapping[qnum]; 892 _urb = _rtl_usb_tx_urb_setup(hw, skb, ep_num); 893 if (unlikely(!_urb)) { 894 pr_err("Can't allocate urb. Drop skb!\n"); 895 kfree_skb(skb); 896 return; 897 } 898 _rtl_submit_tx_urb(hw, _urb); 899 } 900 901 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw, 902 struct ieee80211_sta *sta, 903 struct sk_buff *skb, 904 u16 hw_queue) 905 { 906 struct rtl_priv *rtlpriv = rtl_priv(hw); 907 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 908 struct rtl_tx_desc *pdesc = NULL; 909 struct rtl_tcb_desc tcb_desc; 910 struct ieee80211_hdr *hdr = rtl_get_hdr(skb); 911 __le16 fc = hdr->frame_control; 912 u8 *pda_addr = hdr->addr1; 913 914 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc)); 915 if (ieee80211_is_auth(fc)) { 916 rtl_dbg(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n"); 917 } 918 919 if (rtlpriv->psc.sw_ps_enabled) { 920 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) && 921 !ieee80211_has_pm(fc)) 922 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 923 } 924 925 rtl_action_proc(hw, skb, true); 926 if (is_multicast_ether_addr(pda_addr)) 927 rtlpriv->stats.txbytesmulticast += skb->len; 928 else if (is_broadcast_ether_addr(pda_addr)) 929 rtlpriv->stats.txbytesbroadcast += skb->len; 930 else 931 rtlpriv->stats.txbytesunicast += skb->len; 932 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb, 933 hw_queue, &tcb_desc); 934 if (ieee80211_is_data(fc)) 935 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX); 936 } 937 938 static int rtl_usb_tx(struct ieee80211_hw *hw, 939 struct ieee80211_sta *sta, 940 struct sk_buff *skb, 941 struct rtl_tcb_desc *dummy) 942 { 943 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 944 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 945 struct ieee80211_hdr *hdr = rtl_get_hdr(skb); 946 __le16 fc = hdr->frame_control; 947 u16 hw_queue; 948 949 if (unlikely(is_hal_stop(rtlhal))) 950 goto err_free; 951 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb)); 952 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue); 953 _rtl_usb_transmit(hw, skb, hw_queue); 954 return NETDEV_TX_OK; 955 956 err_free: 957 dev_kfree_skb_any(skb); 958 return NETDEV_TX_OK; 959 } 960 961 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw, 962 struct ieee80211_sta *sta, 963 struct sk_buff *skb) 964 { 965 return false; 966 } 967 968 static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work) 969 { 970 struct rtl_works *rtlworks = 971 container_of(work, struct rtl_works, fill_h2c_cmd); 972 struct ieee80211_hw *hw = rtlworks->hw; 973 struct rtl_priv *rtlpriv = rtl_priv(hw); 974 975 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask); 976 } 977 978 static const struct rtl_intf_ops rtl_usb_ops = { 979 .adapter_start = rtl_usb_start, 980 .adapter_stop = rtl_usb_stop, 981 .adapter_tx = rtl_usb_tx, 982 .waitq_insert = rtl_usb_tx_chk_waitq_insert, 983 }; 984 985 int rtl_usb_probe(struct usb_interface *intf, 986 const struct usb_device_id *id, 987 struct rtl_hal_cfg *rtl_hal_cfg) 988 { 989 int err; 990 struct ieee80211_hw *hw = NULL; 991 struct rtl_priv *rtlpriv = NULL; 992 struct usb_device *udev; 993 struct rtl_usb_priv *usb_priv; 994 995 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) + 996 sizeof(struct rtl_usb_priv), &rtl_ops); 997 if (!hw) { 998 pr_warn("rtl_usb: ieee80211 alloc failed\n"); 999 return -ENOMEM; 1000 } 1001 rtlpriv = hw->priv; 1002 rtlpriv->hw = hw; 1003 rtlpriv->usb_data = kcalloc(RTL_USB_MAX_RX_COUNT, sizeof(u32), 1004 GFP_KERNEL); 1005 if (!rtlpriv->usb_data) { 1006 ieee80211_free_hw(hw); 1007 return -ENOMEM; 1008 } 1009 1010 /* this spin lock must be initialized early */ 1011 spin_lock_init(&rtlpriv->locks.usb_lock); 1012 INIT_WORK(&rtlpriv->works.fill_h2c_cmd, 1013 rtl_fill_h2c_cmd_work_callback); 1014 INIT_WORK(&rtlpriv->works.lps_change_work, 1015 rtl_lps_change_work_callback); 1016 INIT_WORK(&rtlpriv->works.update_beacon_work, 1017 rtl_update_beacon_work_callback); 1018 1019 rtlpriv->usb_data_index = 0; 1020 init_completion(&rtlpriv->firmware_loading_complete); 1021 SET_IEEE80211_DEV(hw, &intf->dev); 1022 udev = interface_to_usbdev(intf); 1023 usb_get_dev(udev); 1024 usb_priv = rtl_usbpriv(hw); 1025 memset(usb_priv, 0, sizeof(*usb_priv)); 1026 usb_priv->dev.intf = intf; 1027 usb_priv->dev.udev = udev; 1028 usb_set_intfdata(intf, hw); 1029 /* init cfg & intf_ops */ 1030 rtlpriv->rtlhal.interface = INTF_USB; 1031 rtlpriv->cfg = rtl_hal_cfg; 1032 rtlpriv->intf_ops = &rtl_usb_ops; 1033 /* Init IO handler */ 1034 _rtl_usb_io_handler_init(&udev->dev, hw); 1035 rtlpriv->cfg->ops->read_chip_version(hw); 1036 /*like read eeprom and so on */ 1037 rtlpriv->cfg->ops->read_eeprom_info(hw); 1038 err = _rtl_usb_init(hw); 1039 if (err) 1040 goto error_out2; 1041 rtl_usb_init_sw(hw); 1042 /* Init mac80211 sw */ 1043 err = rtl_init_core(hw); 1044 if (err) { 1045 pr_err("Can't allocate sw for mac80211\n"); 1046 goto error_out2; 1047 } 1048 if (rtlpriv->cfg->ops->init_sw_vars(hw)) { 1049 pr_err("Can't init_sw_vars\n"); 1050 goto error_out; 1051 } 1052 rtl_init_sw_leds(hw); 1053 1054 err = ieee80211_register_hw(hw); 1055 if (err) { 1056 pr_err("Can't register mac80211 hw.\n"); 1057 goto error_out; 1058 } 1059 rtlpriv->mac80211.mac80211_registered = 1; 1060 1061 set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status); 1062 return 0; 1063 1064 error_out: 1065 rtl_deinit_core(hw); 1066 error_out2: 1067 _rtl_usb_io_handler_release(hw); 1068 usb_put_dev(udev); 1069 complete(&rtlpriv->firmware_loading_complete); 1070 kfree(rtlpriv->usb_data); 1071 ieee80211_free_hw(hw); 1072 return -ENODEV; 1073 } 1074 EXPORT_SYMBOL(rtl_usb_probe); 1075 1076 void rtl_usb_disconnect(struct usb_interface *intf) 1077 { 1078 struct ieee80211_hw *hw = usb_get_intfdata(intf); 1079 struct rtl_priv *rtlpriv = rtl_priv(hw); 1080 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw)); 1081 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 1082 1083 if (unlikely(!rtlpriv)) 1084 return; 1085 /* just in case driver is removed before firmware callback */ 1086 wait_for_completion(&rtlpriv->firmware_loading_complete); 1087 clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status); 1088 /*ieee80211_unregister_hw will call ops_stop */ 1089 if (rtlmac->mac80211_registered == 1) { 1090 ieee80211_unregister_hw(hw); 1091 rtlmac->mac80211_registered = 0; 1092 } else { 1093 rtl_deinit_deferred_work(hw, false); 1094 rtlpriv->intf_ops->adapter_stop(hw); 1095 } 1096 /*deinit rfkill */ 1097 /* rtl_deinit_rfkill(hw); */ 1098 rtl_usb_deinit(hw); 1099 rtl_deinit_core(hw); 1100 kfree(rtlpriv->usb_data); 1101 rtlpriv->cfg->ops->deinit_sw_vars(hw); 1102 _rtl_usb_io_handler_release(hw); 1103 usb_put_dev(rtlusb->udev); 1104 usb_set_intfdata(intf, NULL); 1105 ieee80211_free_hw(hw); 1106 } 1107 EXPORT_SYMBOL(rtl_usb_disconnect); 1108 1109 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message) 1110 { 1111 return 0; 1112 } 1113 EXPORT_SYMBOL(rtl_usb_suspend); 1114 1115 int rtl_usb_resume(struct usb_interface *pusb_intf) 1116 { 1117 return 0; 1118 } 1119 EXPORT_SYMBOL(rtl_usb_resume); 1120