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 _rtl_usb_cleanup_tx(struct ieee80211_hw *hw); 27 28 static 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 else 39 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 60 static 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 80 static 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 } 99 100 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr) 101 { 102 return (u8)_usb_read_sync(rtlpriv, addr, 1); 103 } 104 105 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr) 106 { 107 return (u16)_usb_read_sync(rtlpriv, addr, 2); 108 } 109 110 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr) 111 { 112 return _usb_read_sync(rtlpriv, addr, 4); 113 } 114 115 static void _usb_write8_sync(struct rtl_priv *rtlpriv, u32 addr, u8 val) 116 { 117 _usb_write_sync(rtlpriv, addr, val, 1); 118 } 119 120 static void _usb_write16_sync(struct rtl_priv *rtlpriv, u32 addr, u16 val) 121 { 122 _usb_write_sync(rtlpriv, addr, val, 2); 123 } 124 125 static void _usb_write32_sync(struct rtl_priv *rtlpriv, u32 addr, u32 val) 126 { 127 _usb_write_sync(rtlpriv, addr, val, 4); 128 } 129 130 static 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 } 137 138 static 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 } 153 154 static 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. */ 162 static 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) 170 171 static 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_SIZE 179 : 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_hdl 201 : &_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 } 210 211 static void _rtl_rx_work(struct tasklet_struct *t); 212 213 static 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 } 235 236 static 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 one 255 * 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 else 260 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; 304 305 err_out: 306 _rtl_usb_cleanup_tx(hw); 307 return err; 308 } 309 310 static 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 } 346 347 static void _rtl_rx_completed(struct urb *urb); 348 349 static 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 } 368 369 static 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 } 410 411 static 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 else 455 dev_kfree_skb_any(skb); 456 } else { 457 dev_kfree_skb_any(skb); 458 } 459 } 460 461 static 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 64 479 480 static 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 } 501 502 static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr, 503 unsigned int len) 504 { 505 #if NET_IP_ALIGN != 0 506 unsigned int padding = 0; 507 #endif 508 509 /* make function no-op when possible */ 510 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr)) 511 return 0; 512 513 #if NET_IP_ALIGN != 0 514 /* 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 outside 523 * 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 #endif 535 } 536 537 #define __RADIO_TAP_SIZE_RSV 32 538 539 static 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 } 602 603 resubmit: 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; 611 612 free: 613 /* On some architectures, usb_free_coherent must not be called from 614 * hardirq context. Queue urb to cleanup list. 615 */ 616 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs); 617 } 618 619 #undef __RADIO_TAP_SIZE_RSV 620 621 static 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 skb_queue_purge(&rtlusb->rx_queue); 633 634 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { 635 usb_free_coherent(urb->dev, urb->transfer_buffer_length, 636 urb->transfer_buffer, urb->transfer_dma); 637 usb_free_urb(urb); 638 } 639 } 640 641 static int _rtl_usb_receive(struct ieee80211_hw *hw) 642 { 643 struct urb *urb; 644 int err; 645 int i; 646 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 647 648 WARN_ON(0 == rtlusb->rx_urb_num); 649 /* 1600 == 1514 + max WLAN header + rtk info */ 650 WARN_ON(rtlusb->rx_max_size < 1600); 651 652 for (i = 0; i < rtlusb->rx_urb_num; i++) { 653 err = -ENOMEM; 654 urb = usb_alloc_urb(0, GFP_KERNEL); 655 if (!urb) 656 goto err_out; 657 658 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL); 659 if (err < 0) { 660 pr_err("Failed to prep_rx_urb!!\n"); 661 usb_free_urb(urb); 662 goto err_out; 663 } 664 665 usb_anchor_urb(urb, &rtlusb->rx_submitted); 666 err = usb_submit_urb(urb, GFP_KERNEL); 667 if (err) { 668 usb_unanchor_urb(urb); 669 usb_free_urb(urb); 670 goto err_out; 671 } 672 usb_free_urb(urb); 673 } 674 return 0; 675 676 err_out: 677 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 678 return err; 679 } 680 681 static int rtl_usb_start(struct ieee80211_hw *hw) 682 { 683 int err; 684 struct rtl_priv *rtlpriv = rtl_priv(hw); 685 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 686 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 687 688 err = rtlpriv->cfg->ops->hw_init(hw); 689 if (!err) { 690 rtl_init_rx_config(hw); 691 692 /* Enable software */ 693 SET_USB_START(rtlusb); 694 /* should after adapter start and interrupt enable. */ 695 set_hal_start(rtlhal); 696 697 /* Start bulk IN */ 698 err = _rtl_usb_receive(hw); 699 } 700 701 return err; 702 } 703 704 /*======================= tx =========================================*/ 705 static void _rtl_usb_cleanup_tx(struct ieee80211_hw *hw) 706 { 707 u32 i; 708 struct sk_buff *_skb; 709 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 710 struct ieee80211_tx_info *txinfo; 711 712 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) { 713 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) { 714 rtlusb->usb_tx_cleanup(hw, _skb); 715 txinfo = IEEE80211_SKB_CB(_skb); 716 ieee80211_tx_info_clear_status(txinfo); 717 txinfo->flags |= IEEE80211_TX_STAT_ACK; 718 ieee80211_tx_status_irqsafe(hw, _skb); 719 } 720 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]); 721 } 722 usb_kill_anchored_urbs(&rtlusb->tx_submitted); 723 } 724 725 static void rtl_usb_cleanup(struct ieee80211_hw *hw) 726 { 727 _rtl_usb_cleanup_rx(hw); 728 _rtl_usb_cleanup_tx(hw); 729 } 730 731 /* We may add some struct into struct rtl_usb later. Do deinit here. */ 732 static void rtl_usb_deinit(struct ieee80211_hw *hw) 733 { 734 rtl_usb_cleanup(hw); 735 } 736 737 static void rtl_usb_stop(struct ieee80211_hw *hw) 738 { 739 struct rtl_priv *rtlpriv = rtl_priv(hw); 740 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 741 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 742 struct urb *urb; 743 744 /* should after adapter start and interrupt enable. */ 745 set_hal_stop(rtlhal); 746 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd); 747 /* Enable software */ 748 SET_USB_STOP(rtlusb); 749 750 /* free pre-allocated URBs from rtl_usb_start() */ 751 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 752 753 tasklet_kill(&rtlusb->rx_work_tasklet); 754 cancel_work_sync(&rtlpriv->works.lps_change_work); 755 cancel_work_sync(&rtlpriv->works.update_beacon_work); 756 757 flush_workqueue(rtlpriv->works.rtl_wq); 758 759 skb_queue_purge(&rtlusb->rx_queue); 760 761 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { 762 usb_free_coherent(urb->dev, urb->transfer_buffer_length, 763 urb->transfer_buffer, urb->transfer_dma); 764 usb_free_urb(urb); 765 } 766 767 rtlpriv->cfg->ops->hw_disable(hw); 768 } 769 770 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb) 771 { 772 int err; 773 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 774 775 usb_anchor_urb(_urb, &rtlusb->tx_submitted); 776 err = usb_submit_urb(_urb, GFP_ATOMIC); 777 if (err < 0) { 778 struct sk_buff *skb; 779 780 pr_err("Failed to submit urb\n"); 781 usb_unanchor_urb(_urb); 782 skb = (struct sk_buff *)_urb->context; 783 kfree_skb(skb); 784 } 785 usb_free_urb(_urb); 786 } 787 788 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb, 789 struct sk_buff *skb) 790 { 791 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 792 struct ieee80211_tx_info *txinfo; 793 794 rtlusb->usb_tx_post_hdl(hw, urb, skb); 795 skb_pull(skb, RTL_TX_HEADER_SIZE); 796 txinfo = IEEE80211_SKB_CB(skb); 797 ieee80211_tx_info_clear_status(txinfo); 798 txinfo->flags |= IEEE80211_TX_STAT_ACK; 799 800 if (urb->status) { 801 pr_err("Urb has error status 0x%X\n", urb->status); 802 goto out; 803 } 804 /* TODO: statistics */ 805 out: 806 ieee80211_tx_status_irqsafe(hw, skb); 807 return urb->status; 808 } 809 810 static void _rtl_tx_complete(struct urb *urb) 811 { 812 struct sk_buff *skb = (struct sk_buff *)urb->context; 813 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 814 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0]; 815 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 816 int err; 817 818 if (unlikely(IS_USB_STOP(rtlusb))) 819 return; 820 err = _usb_tx_post(hw, urb, skb); 821 if (err) { 822 /* Ignore error and keep issuiing other urbs */ 823 return; 824 } 825 } 826 827 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw, 828 struct sk_buff *skb, u32 ep_num) 829 { 830 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 831 struct urb *_urb; 832 833 WARN_ON(NULL == skb); 834 _urb = usb_alloc_urb(0, GFP_ATOMIC); 835 if (!_urb) 836 return NULL; 837 _rtl_install_trx_info(rtlusb, skb, ep_num); 838 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev, 839 ep_num), skb->data, skb->len, _rtl_tx_complete, skb); 840 _urb->transfer_flags |= URB_ZERO_PACKET; 841 return _urb; 842 } 843 844 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb, 845 enum rtl_txq qnum) 846 { 847 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 848 u32 ep_num; 849 struct urb *_urb = NULL; 850 851 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl); 852 if (unlikely(IS_USB_STOP(rtlusb))) { 853 pr_err("USB device is stopping...\n"); 854 kfree_skb(skb); 855 return; 856 } 857 ep_num = rtlusb->ep_map.ep_mapping[qnum]; 858 _urb = _rtl_usb_tx_urb_setup(hw, skb, ep_num); 859 if (unlikely(!_urb)) { 860 pr_err("Can't allocate urb. Drop skb!\n"); 861 kfree_skb(skb); 862 return; 863 } 864 _rtl_submit_tx_urb(hw, _urb); 865 } 866 867 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw, 868 struct ieee80211_sta *sta, 869 struct sk_buff *skb, 870 u16 hw_queue) 871 { 872 struct rtl_priv *rtlpriv = rtl_priv(hw); 873 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 874 struct rtl_tx_desc *pdesc = NULL; 875 struct rtl_tcb_desc tcb_desc; 876 struct ieee80211_hdr *hdr = rtl_get_hdr(skb); 877 __le16 fc = hdr->frame_control; 878 u8 *pda_addr = hdr->addr1; 879 880 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc)); 881 if (ieee80211_is_auth(fc)) { 882 rtl_dbg(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n"); 883 } 884 885 if (rtlpriv->psc.sw_ps_enabled) { 886 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) && 887 !ieee80211_has_pm(fc)) 888 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 889 } 890 891 rtl_action_proc(hw, skb, true); 892 if (is_multicast_ether_addr(pda_addr)) 893 rtlpriv->stats.txbytesmulticast += skb->len; 894 else if (is_broadcast_ether_addr(pda_addr)) 895 rtlpriv->stats.txbytesbroadcast += skb->len; 896 else 897 rtlpriv->stats.txbytesunicast += skb->len; 898 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb, 899 hw_queue, &tcb_desc); 900 if (ieee80211_is_data(fc)) 901 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX); 902 } 903 904 static int rtl_usb_tx(struct ieee80211_hw *hw, 905 struct ieee80211_sta *sta, 906 struct sk_buff *skb, 907 struct rtl_tcb_desc *dummy) 908 { 909 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 910 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 911 struct ieee80211_hdr *hdr = rtl_get_hdr(skb); 912 __le16 fc = hdr->frame_control; 913 u16 hw_queue; 914 915 if (unlikely(is_hal_stop(rtlhal))) 916 goto err_free; 917 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb)); 918 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue); 919 _rtl_usb_transmit(hw, skb, hw_queue); 920 return NETDEV_TX_OK; 921 922 err_free: 923 dev_kfree_skb_any(skb); 924 return NETDEV_TX_OK; 925 } 926 927 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw, 928 struct ieee80211_sta *sta, 929 struct sk_buff *skb) 930 { 931 return false; 932 } 933 934 static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work) 935 { 936 struct rtl_works *rtlworks = 937 container_of(work, struct rtl_works, fill_h2c_cmd); 938 struct ieee80211_hw *hw = rtlworks->hw; 939 struct rtl_priv *rtlpriv = rtl_priv(hw); 940 941 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask); 942 } 943 944 static const struct rtl_intf_ops rtl_usb_ops = { 945 .adapter_start = rtl_usb_start, 946 .adapter_stop = rtl_usb_stop, 947 .adapter_tx = rtl_usb_tx, 948 .waitq_insert = rtl_usb_tx_chk_waitq_insert, 949 }; 950 951 int rtl_usb_probe(struct usb_interface *intf, 952 const struct usb_device_id *id, 953 const struct rtl_hal_cfg *rtl_hal_cfg) 954 { 955 int err; 956 struct ieee80211_hw *hw = NULL; 957 struct rtl_priv *rtlpriv = NULL; 958 struct usb_device *udev; 959 struct rtl_usb_priv *usb_priv; 960 961 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) + 962 sizeof(struct rtl_usb_priv), &rtl_ops); 963 if (!hw) { 964 pr_warn("rtl_usb: ieee80211 alloc failed\n"); 965 return -ENOMEM; 966 } 967 rtlpriv = hw->priv; 968 rtlpriv->hw = hw; 969 rtlpriv->usb_data = kcalloc(RTL_USB_MAX_RX_COUNT, sizeof(u32), 970 GFP_KERNEL); 971 if (!rtlpriv->usb_data) { 972 ieee80211_free_hw(hw); 973 return -ENOMEM; 974 } 975 976 /* this spin lock must be initialized early */ 977 spin_lock_init(&rtlpriv->locks.usb_lock); 978 INIT_WORK(&rtlpriv->works.fill_h2c_cmd, 979 rtl_fill_h2c_cmd_work_callback); 980 INIT_WORK(&rtlpriv->works.lps_change_work, 981 rtl_lps_change_work_callback); 982 INIT_WORK(&rtlpriv->works.update_beacon_work, 983 rtl_update_beacon_work_callback); 984 985 rtlpriv->usb_data_index = 0; 986 init_completion(&rtlpriv->firmware_loading_complete); 987 SET_IEEE80211_DEV(hw, &intf->dev); 988 udev = interface_to_usbdev(intf); 989 usb_get_dev(udev); 990 usb_priv = rtl_usbpriv(hw); 991 memset(usb_priv, 0, sizeof(*usb_priv)); 992 usb_priv->dev.intf = intf; 993 usb_priv->dev.udev = udev; 994 usb_set_intfdata(intf, hw); 995 /* For dual MAC RTL8192DU, which has two interfaces. */ 996 rtlpriv->rtlhal.interfaceindex = 997 intf->altsetting[0].desc.bInterfaceNumber; 998 /* init cfg & intf_ops */ 999 rtlpriv->rtlhal.interface = INTF_USB; 1000 rtlpriv->cfg = rtl_hal_cfg; 1001 rtlpriv->intf_ops = &rtl_usb_ops; 1002 /* Init IO handler */ 1003 _rtl_usb_io_handler_init(&udev->dev, hw); 1004 rtlpriv->cfg->ops->read_chip_version(hw); 1005 /*like read eeprom and so on */ 1006 rtlpriv->cfg->ops->read_eeprom_info(hw); 1007 err = _rtl_usb_init(hw); 1008 if (err) 1009 goto error_out2; 1010 rtl_usb_init_sw(hw); 1011 /* Init mac80211 sw */ 1012 err = rtl_init_core(hw); 1013 if (err) { 1014 pr_err("Can't allocate sw for mac80211\n"); 1015 goto error_out2; 1016 } 1017 if (rtlpriv->cfg->ops->init_sw_vars(hw)) { 1018 pr_err("Can't init_sw_vars\n"); 1019 goto error_out; 1020 } 1021 rtl_init_sw_leds(hw); 1022 1023 err = ieee80211_register_hw(hw); 1024 if (err) { 1025 pr_err("Can't register mac80211 hw.\n"); 1026 goto error_init_vars; 1027 } 1028 rtlpriv->mac80211.mac80211_registered = 1; 1029 1030 set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status); 1031 return 0; 1032 1033 error_init_vars: 1034 wait_for_completion(&rtlpriv->firmware_loading_complete); 1035 rtlpriv->cfg->ops->deinit_sw_vars(hw); 1036 error_out: 1037 rtl_usb_deinit(hw); 1038 rtl_deinit_core(hw); 1039 error_out2: 1040 _rtl_usb_io_handler_release(hw); 1041 usb_put_dev(udev); 1042 kfree(rtlpriv->usb_data); 1043 ieee80211_free_hw(hw); 1044 return -ENODEV; 1045 } 1046 EXPORT_SYMBOL(rtl_usb_probe); 1047 1048 void rtl_usb_disconnect(struct usb_interface *intf) 1049 { 1050 struct ieee80211_hw *hw = usb_get_intfdata(intf); 1051 struct rtl_priv *rtlpriv = rtl_priv(hw); 1052 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw)); 1053 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 1054 1055 if (unlikely(!rtlpriv)) 1056 return; 1057 /* just in case driver is removed before firmware callback */ 1058 wait_for_completion(&rtlpriv->firmware_loading_complete); 1059 clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status); 1060 /*ieee80211_unregister_hw will call ops_stop */ 1061 if (rtlmac->mac80211_registered == 1) { 1062 ieee80211_unregister_hw(hw); 1063 rtlmac->mac80211_registered = 0; 1064 } else { 1065 rtl_deinit_deferred_work(hw, false); 1066 rtlpriv->intf_ops->adapter_stop(hw); 1067 } 1068 /*deinit rfkill */ 1069 /* rtl_deinit_rfkill(hw); */ 1070 rtl_usb_deinit(hw); 1071 rtl_deinit_core(hw); 1072 kfree(rtlpriv->usb_data); 1073 rtlpriv->cfg->ops->deinit_sw_vars(hw); 1074 _rtl_usb_io_handler_release(hw); 1075 usb_put_dev(rtlusb->udev); 1076 usb_set_intfdata(intf, NULL); 1077 ieee80211_free_hw(hw); 1078 } 1079 EXPORT_SYMBOL(rtl_usb_disconnect); 1080 1081 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message) 1082 { 1083 return 0; 1084 } 1085 EXPORT_SYMBOL(rtl_usb_suspend); 1086 1087 int rtl_usb_resume(struct usb_interface *pusb_intf) 1088 { 1089 return 0; 1090 } 1091 EXPORT_SYMBOL(rtl_usb_resume); 1092