1 /****************************************************************************** 2 * 3 * Copyright(c) 2009-2012 Realtek Corporation. All rights reserved. 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of version 2 of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 12 * more details. 13 * 14 * The full GNU General Public License is included in this distribution in the 15 * file called LICENSE. 16 * 17 * Contact Information: 18 * wlanfae <wlanfae@realtek.com> 19 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park, 20 * Hsinchu 300, Taiwan. 21 * 22 *****************************************************************************/ 23 24 #include "wifi.h" 25 #include "core.h" 26 #include "usb.h" 27 #include "base.h" 28 #include "ps.h" 29 #include "rtl8192c/fw_common.h" 30 #include <linux/export.h> 31 #include <linux/module.h> 32 33 MODULE_AUTHOR("lizhaoming <chaoming_li@realsil.com.cn>"); 34 MODULE_AUTHOR("Realtek WlanFAE <wlanfae@realtek.com>"); 35 MODULE_AUTHOR("Larry Finger <Larry.FInger@lwfinger.net>"); 36 MODULE_LICENSE("GPL"); 37 MODULE_DESCRIPTION("USB basic driver for rtlwifi"); 38 39 #define REALTEK_USB_VENQT_READ 0xC0 40 #define REALTEK_USB_VENQT_WRITE 0x40 41 #define REALTEK_USB_VENQT_CMD_REQ 0x05 42 #define REALTEK_USB_VENQT_CMD_IDX 0x00 43 44 #define MAX_USBCTRL_VENDORREQ_TIMES 10 45 46 static void usbctrl_async_callback(struct urb *urb) 47 { 48 if (urb) { 49 /* free dr */ 50 kfree(urb->setup_packet); 51 /* free databuf */ 52 kfree(urb->transfer_buffer); 53 } 54 } 55 56 static int _usbctrl_vendorreq_async_write(struct usb_device *udev, u8 request, 57 u16 value, u16 index, void *pdata, 58 u16 len) 59 { 60 int rc; 61 unsigned int pipe; 62 u8 reqtype; 63 struct usb_ctrlrequest *dr; 64 struct urb *urb; 65 const u16 databuf_maxlen = REALTEK_USB_VENQT_MAX_BUF_SIZE; 66 u8 *databuf; 67 68 if (WARN_ON_ONCE(len > databuf_maxlen)) 69 len = databuf_maxlen; 70 71 pipe = usb_sndctrlpipe(udev, 0); /* write_out */ 72 reqtype = REALTEK_USB_VENQT_WRITE; 73 74 dr = kzalloc(sizeof(*dr), GFP_ATOMIC); 75 if (!dr) 76 return -ENOMEM; 77 78 databuf = kzalloc(databuf_maxlen, GFP_ATOMIC); 79 if (!databuf) { 80 kfree(dr); 81 return -ENOMEM; 82 } 83 84 urb = usb_alloc_urb(0, GFP_ATOMIC); 85 if (!urb) { 86 kfree(databuf); 87 kfree(dr); 88 return -ENOMEM; 89 } 90 91 dr->bRequestType = reqtype; 92 dr->bRequest = request; 93 dr->wValue = cpu_to_le16(value); 94 dr->wIndex = cpu_to_le16(index); 95 dr->wLength = cpu_to_le16(len); 96 /* data are already in little-endian order */ 97 memcpy(databuf, pdata, len); 98 usb_fill_control_urb(urb, udev, pipe, 99 (unsigned char *)dr, databuf, len, 100 usbctrl_async_callback, NULL); 101 rc = usb_submit_urb(urb, GFP_ATOMIC); 102 if (rc < 0) { 103 kfree(databuf); 104 kfree(dr); 105 } 106 usb_free_urb(urb); 107 return rc; 108 } 109 110 static int _usbctrl_vendorreq_sync_read(struct usb_device *udev, u8 request, 111 u16 value, u16 index, void *pdata, 112 u16 len) 113 { 114 unsigned int pipe; 115 int status; 116 u8 reqtype; 117 int vendorreq_times = 0; 118 static int count; 119 120 pipe = usb_rcvctrlpipe(udev, 0); /* read_in */ 121 reqtype = REALTEK_USB_VENQT_READ; 122 123 do { 124 status = usb_control_msg(udev, pipe, request, reqtype, value, 125 index, pdata, len, 1000); 126 if (status < 0) { 127 /* firmware download is checksumed, don't retry */ 128 if ((value >= FW_8192C_START_ADDRESS && 129 value <= FW_8192C_END_ADDRESS)) 130 break; 131 } else { 132 break; 133 } 134 } while (++vendorreq_times < MAX_USBCTRL_VENDORREQ_TIMES); 135 136 if (status < 0 && count++ < 4) 137 pr_err("reg 0x%x, usbctrl_vendorreq TimeOut! status:0x%x value=0x%x\n", 138 value, status, *(u32 *)pdata); 139 return status; 140 } 141 142 static u32 _usb_read_sync(struct rtl_priv *rtlpriv, u32 addr, u16 len) 143 { 144 struct device *dev = rtlpriv->io.dev; 145 struct usb_device *udev = to_usb_device(dev); 146 u8 request; 147 u16 wvalue; 148 u16 index; 149 __le32 *data; 150 unsigned long flags; 151 152 spin_lock_irqsave(&rtlpriv->locks.usb_lock, flags); 153 if (++rtlpriv->usb_data_index >= RTL_USB_MAX_RX_COUNT) 154 rtlpriv->usb_data_index = 0; 155 data = &rtlpriv->usb_data[rtlpriv->usb_data_index]; 156 spin_unlock_irqrestore(&rtlpriv->locks.usb_lock, flags); 157 request = REALTEK_USB_VENQT_CMD_REQ; 158 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */ 159 160 wvalue = (u16)addr; 161 _usbctrl_vendorreq_sync_read(udev, request, wvalue, index, data, len); 162 return le32_to_cpu(*data); 163 } 164 165 static u8 _usb_read8_sync(struct rtl_priv *rtlpriv, u32 addr) 166 { 167 return (u8)_usb_read_sync(rtlpriv, addr, 1); 168 } 169 170 static u16 _usb_read16_sync(struct rtl_priv *rtlpriv, u32 addr) 171 { 172 return (u16)_usb_read_sync(rtlpriv, addr, 2); 173 } 174 175 static u32 _usb_read32_sync(struct rtl_priv *rtlpriv, u32 addr) 176 { 177 return _usb_read_sync(rtlpriv, addr, 4); 178 } 179 180 static void _usb_write_async(struct usb_device *udev, u32 addr, u32 val, 181 u16 len) 182 { 183 u8 request; 184 u16 wvalue; 185 u16 index; 186 __le32 data; 187 188 request = REALTEK_USB_VENQT_CMD_REQ; 189 index = REALTEK_USB_VENQT_CMD_IDX; /* n/a */ 190 wvalue = (u16)(addr&0x0000ffff); 191 data = cpu_to_le32(val); 192 _usbctrl_vendorreq_async_write(udev, request, wvalue, index, &data, 193 len); 194 } 195 196 static void _usb_write8_async(struct rtl_priv *rtlpriv, u32 addr, u8 val) 197 { 198 struct device *dev = rtlpriv->io.dev; 199 200 _usb_write_async(to_usb_device(dev), addr, val, 1); 201 } 202 203 static void _usb_write16_async(struct rtl_priv *rtlpriv, u32 addr, u16 val) 204 { 205 struct device *dev = rtlpriv->io.dev; 206 207 _usb_write_async(to_usb_device(dev), addr, val, 2); 208 } 209 210 static void _usb_write32_async(struct rtl_priv *rtlpriv, u32 addr, u32 val) 211 { 212 struct device *dev = rtlpriv->io.dev; 213 214 _usb_write_async(to_usb_device(dev), addr, val, 4); 215 } 216 217 static void _usb_writeN_sync(struct rtl_priv *rtlpriv, u32 addr, void *data, 218 u16 len) 219 { 220 struct device *dev = rtlpriv->io.dev; 221 struct usb_device *udev = to_usb_device(dev); 222 u8 request = REALTEK_USB_VENQT_CMD_REQ; 223 u8 reqtype = REALTEK_USB_VENQT_WRITE; 224 u16 wvalue; 225 u16 index = REALTEK_USB_VENQT_CMD_IDX; 226 int pipe = usb_sndctrlpipe(udev, 0); /* write_out */ 227 u8 *buffer; 228 229 wvalue = (u16)(addr & 0x0000ffff); 230 buffer = kmemdup(data, len, GFP_ATOMIC); 231 if (!buffer) 232 return; 233 usb_control_msg(udev, pipe, request, reqtype, wvalue, 234 index, buffer, len, 50); 235 236 kfree(buffer); 237 } 238 239 static void _rtl_usb_io_handler_init(struct device *dev, 240 struct ieee80211_hw *hw) 241 { 242 struct rtl_priv *rtlpriv = rtl_priv(hw); 243 244 rtlpriv->io.dev = dev; 245 mutex_init(&rtlpriv->io.bb_mutex); 246 rtlpriv->io.write8_async = _usb_write8_async; 247 rtlpriv->io.write16_async = _usb_write16_async; 248 rtlpriv->io.write32_async = _usb_write32_async; 249 rtlpriv->io.read8_sync = _usb_read8_sync; 250 rtlpriv->io.read16_sync = _usb_read16_sync; 251 rtlpriv->io.read32_sync = _usb_read32_sync; 252 rtlpriv->io.writeN_sync = _usb_writeN_sync; 253 } 254 255 static void _rtl_usb_io_handler_release(struct ieee80211_hw *hw) 256 { 257 struct rtl_priv __maybe_unused *rtlpriv = rtl_priv(hw); 258 259 mutex_destroy(&rtlpriv->io.bb_mutex); 260 } 261 262 /** 263 * 264 * Default aggregation handler. Do nothing and just return the oldest skb. 265 */ 266 static struct sk_buff *_none_usb_tx_aggregate_hdl(struct ieee80211_hw *hw, 267 struct sk_buff_head *list) 268 { 269 return skb_dequeue(list); 270 } 271 272 #define IS_HIGH_SPEED_USB(udev) \ 273 ((USB_SPEED_HIGH == (udev)->speed) ? true : false) 274 275 static int _rtl_usb_init_tx(struct ieee80211_hw *hw) 276 { 277 u32 i; 278 struct rtl_priv *rtlpriv = rtl_priv(hw); 279 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 280 281 rtlusb->max_bulk_out_size = IS_HIGH_SPEED_USB(rtlusb->udev) 282 ? USB_HIGH_SPEED_BULK_SIZE 283 : USB_FULL_SPEED_BULK_SIZE; 284 285 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, "USB Max Bulk-out Size=%d\n", 286 rtlusb->max_bulk_out_size); 287 288 for (i = 0; i < __RTL_TXQ_NUM; i++) { 289 u32 ep_num = rtlusb->ep_map.ep_mapping[i]; 290 if (!ep_num) { 291 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, 292 "Invalid endpoint map setting!\n"); 293 return -EINVAL; 294 } 295 } 296 297 rtlusb->usb_tx_post_hdl = 298 rtlpriv->cfg->usb_interface_cfg->usb_tx_post_hdl; 299 rtlusb->usb_tx_cleanup = 300 rtlpriv->cfg->usb_interface_cfg->usb_tx_cleanup; 301 rtlusb->usb_tx_aggregate_hdl = 302 (rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl) 303 ? rtlpriv->cfg->usb_interface_cfg->usb_tx_aggregate_hdl 304 : &_none_usb_tx_aggregate_hdl; 305 306 init_usb_anchor(&rtlusb->tx_submitted); 307 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) { 308 skb_queue_head_init(&rtlusb->tx_skb_queue[i]); 309 init_usb_anchor(&rtlusb->tx_pending[i]); 310 } 311 return 0; 312 } 313 314 static void _rtl_rx_work(unsigned long param); 315 316 static int _rtl_usb_init_rx(struct ieee80211_hw *hw) 317 { 318 struct rtl_priv *rtlpriv = rtl_priv(hw); 319 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw); 320 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv); 321 322 rtlusb->rx_max_size = rtlpriv->cfg->usb_interface_cfg->rx_max_size; 323 rtlusb->rx_urb_num = rtlpriv->cfg->usb_interface_cfg->rx_urb_num; 324 rtlusb->in_ep = rtlpriv->cfg->usb_interface_cfg->in_ep_num; 325 rtlusb->usb_rx_hdl = rtlpriv->cfg->usb_interface_cfg->usb_rx_hdl; 326 rtlusb->usb_rx_segregate_hdl = 327 rtlpriv->cfg->usb_interface_cfg->usb_rx_segregate_hdl; 328 329 pr_info("rx_max_size %d, rx_urb_num %d, in_ep %d\n", 330 rtlusb->rx_max_size, rtlusb->rx_urb_num, rtlusb->in_ep); 331 init_usb_anchor(&rtlusb->rx_submitted); 332 init_usb_anchor(&rtlusb->rx_cleanup_urbs); 333 334 skb_queue_head_init(&rtlusb->rx_queue); 335 rtlusb->rx_work_tasklet.func = _rtl_rx_work; 336 rtlusb->rx_work_tasklet.data = (unsigned long)rtlusb; 337 338 return 0; 339 } 340 341 static int _rtl_usb_init(struct ieee80211_hw *hw) 342 { 343 struct rtl_priv *rtlpriv = rtl_priv(hw); 344 struct rtl_usb_priv *usb_priv = rtl_usbpriv(hw); 345 struct rtl_usb *rtlusb = rtl_usbdev(usb_priv); 346 int err; 347 u8 epidx; 348 struct usb_interface *usb_intf = rtlusb->intf; 349 u8 epnums = usb_intf->cur_altsetting->desc.bNumEndpoints; 350 351 rtlusb->out_ep_nums = rtlusb->in_ep_nums = 0; 352 for (epidx = 0; epidx < epnums; epidx++) { 353 struct usb_endpoint_descriptor *pep_desc; 354 pep_desc = &usb_intf->cur_altsetting->endpoint[epidx].desc; 355 356 if (usb_endpoint_dir_in(pep_desc)) 357 rtlusb->in_ep_nums++; 358 else if (usb_endpoint_dir_out(pep_desc)) 359 rtlusb->out_ep_nums++; 360 361 RT_TRACE(rtlpriv, COMP_INIT, DBG_DMESG, 362 "USB EP(0x%02x), MaxPacketSize=%d, Interval=%d\n", 363 pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize, 364 pep_desc->bInterval); 365 } 366 if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num) { 367 pr_err("Too few input end points found\n"); 368 return -EINVAL; 369 } 370 if (rtlusb->out_ep_nums == 0) { 371 pr_err("No output end points found\n"); 372 return -EINVAL; 373 } 374 /* usb endpoint mapping */ 375 err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw); 376 rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq; 377 _rtl_usb_init_tx(hw); 378 _rtl_usb_init_rx(hw); 379 return err; 380 } 381 382 static void rtl_usb_init_sw(struct ieee80211_hw *hw) 383 { 384 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 385 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 386 struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw)); 387 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 388 389 rtlhal->hw = hw; 390 ppsc->inactiveps = false; 391 ppsc->leisure_ps = false; 392 ppsc->fwctrl_lps = false; 393 ppsc->reg_fwctrl_lps = 3; 394 ppsc->reg_max_lps_awakeintvl = 5; 395 ppsc->fwctrl_psmode = FW_PS_DTIM_MODE; 396 397 /* IBSS */ 398 mac->beacon_interval = 100; 399 400 /* AMPDU */ 401 mac->min_space_cfg = 0; 402 mac->max_mss_density = 0; 403 404 /* set sane AMPDU defaults */ 405 mac->current_ampdu_density = 7; 406 mac->current_ampdu_factor = 3; 407 408 /* QOS */ 409 rtlusb->acm_method = EACMWAY2_SW; 410 411 /* IRQ */ 412 /* HIMR - turn all on */ 413 rtlusb->irq_mask[0] = 0xFFFFFFFF; 414 /* HIMR_EX - turn all on */ 415 rtlusb->irq_mask[1] = 0xFFFFFFFF; 416 rtlusb->disableHWSM = true; 417 } 418 419 static void _rtl_rx_completed(struct urb *urb); 420 421 static int _rtl_prep_rx_urb(struct ieee80211_hw *hw, struct rtl_usb *rtlusb, 422 struct urb *urb, gfp_t gfp_mask) 423 { 424 struct rtl_priv *rtlpriv = rtl_priv(hw); 425 void *buf; 426 427 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask, 428 &urb->transfer_dma); 429 if (!buf) { 430 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 431 "Failed to usb_alloc_coherent!!\n"); 432 return -ENOMEM; 433 } 434 435 usb_fill_bulk_urb(urb, rtlusb->udev, 436 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep), 437 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb); 438 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 439 440 return 0; 441 } 442 443 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw, 444 struct sk_buff *skb) 445 { 446 struct rtl_priv *rtlpriv = rtl_priv(hw); 447 u8 *rxdesc = skb->data; 448 struct ieee80211_hdr *hdr; 449 bool unicast = false; 450 __le16 fc; 451 struct ieee80211_rx_status rx_status = {0}; 452 struct rtl_stats stats = { 453 .signal = 0, 454 .rate = 0, 455 }; 456 457 skb_pull(skb, RTL_RX_DESC_SIZE); 458 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb); 459 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift)); 460 hdr = (struct ieee80211_hdr *)(skb->data); 461 fc = hdr->frame_control; 462 if (!stats.crc) { 463 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 464 465 if (is_broadcast_ether_addr(hdr->addr1)) { 466 /*TODO*/; 467 } else if (is_multicast_ether_addr(hdr->addr1)) { 468 /*TODO*/ 469 } else { 470 unicast = true; 471 rtlpriv->stats.rxbytesunicast += skb->len; 472 } 473 474 if (ieee80211_is_data(fc)) { 475 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX); 476 477 if (unicast) 478 rtlpriv->link_info.num_rx_inperiod++; 479 } 480 /* static bcn for roaming */ 481 rtl_beacon_statistic(hw, skb); 482 } 483 } 484 485 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw, 486 struct sk_buff *skb) 487 { 488 struct rtl_priv *rtlpriv = rtl_priv(hw); 489 u8 *rxdesc = skb->data; 490 struct ieee80211_hdr *hdr; 491 bool unicast = false; 492 __le16 fc; 493 struct ieee80211_rx_status rx_status = {0}; 494 struct rtl_stats stats = { 495 .signal = 0, 496 .rate = 0, 497 }; 498 499 skb_pull(skb, RTL_RX_DESC_SIZE); 500 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb); 501 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift)); 502 hdr = (struct ieee80211_hdr *)(skb->data); 503 fc = hdr->frame_control; 504 if (!stats.crc) { 505 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 506 507 if (is_broadcast_ether_addr(hdr->addr1)) { 508 /*TODO*/; 509 } else if (is_multicast_ether_addr(hdr->addr1)) { 510 /*TODO*/ 511 } else { 512 unicast = true; 513 rtlpriv->stats.rxbytesunicast += skb->len; 514 } 515 516 if (ieee80211_is_data(fc)) { 517 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX); 518 519 if (unicast) 520 rtlpriv->link_info.num_rx_inperiod++; 521 } 522 523 /* static bcn for roaming */ 524 rtl_beacon_statistic(hw, skb); 525 526 if (likely(rtl_action_proc(hw, skb, false))) 527 ieee80211_rx(hw, skb); 528 else 529 dev_kfree_skb_any(skb); 530 } else { 531 dev_kfree_skb_any(skb); 532 } 533 } 534 535 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb) 536 { 537 struct sk_buff *_skb; 538 struct sk_buff_head rx_queue; 539 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 540 541 skb_queue_head_init(&rx_queue); 542 if (rtlusb->usb_rx_segregate_hdl) 543 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue); 544 WARN_ON(skb_queue_empty(&rx_queue)); 545 while (!skb_queue_empty(&rx_queue)) { 546 _skb = skb_dequeue(&rx_queue); 547 _rtl_usb_rx_process_agg(hw, _skb); 548 ieee80211_rx(hw, _skb); 549 } 550 } 551 552 #define __RX_SKB_MAX_QUEUED 64 553 554 static void _rtl_rx_work(unsigned long param) 555 { 556 struct rtl_usb *rtlusb = (struct rtl_usb *)param; 557 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 558 struct sk_buff *skb; 559 560 while ((skb = skb_dequeue(&rtlusb->rx_queue))) { 561 if (unlikely(IS_USB_STOP(rtlusb))) { 562 dev_kfree_skb_any(skb); 563 continue; 564 } 565 566 if (likely(!rtlusb->usb_rx_segregate_hdl)) { 567 _rtl_usb_rx_process_noagg(hw, skb); 568 } else { 569 /* TO DO */ 570 _rtl_rx_pre_process(hw, skb); 571 pr_err("rx agg not supported\n"); 572 } 573 } 574 } 575 576 static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr, 577 unsigned int len) 578 { 579 #if NET_IP_ALIGN != 0 580 unsigned int padding = 0; 581 #endif 582 583 /* make function no-op when possible */ 584 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr)) 585 return 0; 586 587 #if NET_IP_ALIGN != 0 588 /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */ 589 /* TODO: deduplicate common code, define helper function instead? */ 590 591 if (ieee80211_is_data_qos(hdr->frame_control)) { 592 u8 *qc = ieee80211_get_qos_ctl(hdr); 593 594 padding ^= NET_IP_ALIGN; 595 596 /* Input might be invalid, avoid accessing memory outside 597 * the buffer. 598 */ 599 if ((unsigned long)qc - (unsigned long)hdr < len && 600 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 601 padding ^= NET_IP_ALIGN; 602 } 603 604 if (ieee80211_has_a4(hdr->frame_control)) 605 padding ^= NET_IP_ALIGN; 606 607 return padding; 608 #endif 609 } 610 611 #define __RADIO_TAP_SIZE_RSV 32 612 613 static void _rtl_rx_completed(struct urb *_urb) 614 { 615 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context; 616 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 617 struct rtl_priv *rtlpriv = rtl_priv(hw); 618 int err = 0; 619 620 if (unlikely(IS_USB_STOP(rtlusb))) 621 goto free; 622 623 if (likely(0 == _urb->status)) { 624 unsigned int padding; 625 struct sk_buff *skb; 626 unsigned int qlen; 627 unsigned int size = _urb->actual_length; 628 struct ieee80211_hdr *hdr; 629 630 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) { 631 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 632 "Too short packet from bulk IN! (len: %d)\n", 633 size); 634 goto resubmit; 635 } 636 637 qlen = skb_queue_len(&rtlusb->rx_queue); 638 if (qlen >= __RX_SKB_MAX_QUEUED) { 639 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 640 "Pending RX skbuff queue full! (qlen: %d)\n", 641 qlen); 642 goto resubmit; 643 } 644 645 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE); 646 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE); 647 648 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding); 649 if (!skb) { 650 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 651 "Can't allocate skb for bulk IN!\n"); 652 goto resubmit; 653 } 654 655 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep); 656 657 /* Make sure the payload data is 4 byte aligned. */ 658 skb_reserve(skb, padding); 659 660 /* reserve some space for mac80211's radiotap */ 661 skb_reserve(skb, __RADIO_TAP_SIZE_RSV); 662 663 memcpy(skb_put(skb, size), _urb->transfer_buffer, size); 664 665 skb_queue_tail(&rtlusb->rx_queue, skb); 666 tasklet_schedule(&rtlusb->rx_work_tasklet); 667 668 goto resubmit; 669 } 670 671 switch (_urb->status) { 672 /* disconnect */ 673 case -ENOENT: 674 case -ECONNRESET: 675 case -ENODEV: 676 case -ESHUTDOWN: 677 goto free; 678 default: 679 break; 680 } 681 682 resubmit: 683 usb_anchor_urb(_urb, &rtlusb->rx_submitted); 684 err = usb_submit_urb(_urb, GFP_ATOMIC); 685 if (unlikely(err)) { 686 usb_unanchor_urb(_urb); 687 goto free; 688 } 689 return; 690 691 free: 692 /* On some architectures, usb_free_coherent must not be called from 693 * hardirq context. Queue urb to cleanup list. 694 */ 695 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs); 696 } 697 698 #undef __RADIO_TAP_SIZE_RSV 699 700 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw) 701 { 702 struct rtl_priv *rtlpriv = rtl_priv(hw); 703 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 704 struct urb *urb; 705 706 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 707 708 tasklet_kill(&rtlusb->rx_work_tasklet); 709 cancel_work_sync(&rtlpriv->works.lps_change_work); 710 711 flush_workqueue(rtlpriv->works.rtl_wq); 712 destroy_workqueue(rtlpriv->works.rtl_wq); 713 714 skb_queue_purge(&rtlusb->rx_queue); 715 716 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { 717 usb_free_coherent(urb->dev, urb->transfer_buffer_length, 718 urb->transfer_buffer, urb->transfer_dma); 719 usb_free_urb(urb); 720 } 721 } 722 723 static int _rtl_usb_receive(struct ieee80211_hw *hw) 724 { 725 struct urb *urb; 726 int err; 727 int i; 728 struct rtl_priv *rtlpriv = rtl_priv(hw); 729 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 730 731 WARN_ON(0 == rtlusb->rx_urb_num); 732 /* 1600 == 1514 + max WLAN header + rtk info */ 733 WARN_ON(rtlusb->rx_max_size < 1600); 734 735 for (i = 0; i < rtlusb->rx_urb_num; i++) { 736 err = -ENOMEM; 737 urb = usb_alloc_urb(0, GFP_KERNEL); 738 if (!urb) 739 goto err_out; 740 741 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL); 742 if (err < 0) { 743 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 744 "Failed to prep_rx_urb!!\n"); 745 usb_free_urb(urb); 746 goto err_out; 747 } 748 749 usb_anchor_urb(urb, &rtlusb->rx_submitted); 750 err = usb_submit_urb(urb, GFP_KERNEL); 751 if (err) 752 goto err_out; 753 usb_free_urb(urb); 754 } 755 return 0; 756 757 err_out: 758 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 759 _rtl_usb_cleanup_rx(hw); 760 return err; 761 } 762 763 static int rtl_usb_start(struct ieee80211_hw *hw) 764 { 765 int err; 766 struct rtl_priv *rtlpriv = rtl_priv(hw); 767 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 768 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 769 770 err = rtlpriv->cfg->ops->hw_init(hw); 771 if (!err) { 772 rtl_init_rx_config(hw); 773 774 /* Enable software */ 775 SET_USB_START(rtlusb); 776 /* should after adapter start and interrupt enable. */ 777 set_hal_start(rtlhal); 778 779 /* Start bulk IN */ 780 err = _rtl_usb_receive(hw); 781 } 782 783 return err; 784 } 785 /** 786 * 787 * 788 */ 789 790 /*======================= tx =========================================*/ 791 static void rtl_usb_cleanup(struct ieee80211_hw *hw) 792 { 793 u32 i; 794 struct sk_buff *_skb; 795 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 796 struct ieee80211_tx_info *txinfo; 797 798 /* clean up rx stuff. */ 799 _rtl_usb_cleanup_rx(hw); 800 801 /* clean up tx stuff */ 802 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) { 803 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) { 804 rtlusb->usb_tx_cleanup(hw, _skb); 805 txinfo = IEEE80211_SKB_CB(_skb); 806 ieee80211_tx_info_clear_status(txinfo); 807 txinfo->flags |= IEEE80211_TX_STAT_ACK; 808 ieee80211_tx_status_irqsafe(hw, _skb); 809 } 810 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]); 811 } 812 usb_kill_anchored_urbs(&rtlusb->tx_submitted); 813 } 814 815 /** 816 * 817 * We may add some struct into struct rtl_usb later. Do deinit here. 818 * 819 */ 820 static void rtl_usb_deinit(struct ieee80211_hw *hw) 821 { 822 rtl_usb_cleanup(hw); 823 } 824 825 static void rtl_usb_stop(struct ieee80211_hw *hw) 826 { 827 struct rtl_priv *rtlpriv = rtl_priv(hw); 828 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 829 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 830 831 /* should after adapter start and interrupt enable. */ 832 set_hal_stop(rtlhal); 833 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd); 834 /* Enable software */ 835 SET_USB_STOP(rtlusb); 836 rtlpriv->cfg->ops->hw_disable(hw); 837 } 838 839 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb) 840 { 841 int err; 842 struct rtl_priv *rtlpriv = rtl_priv(hw); 843 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 844 845 usb_anchor_urb(_urb, &rtlusb->tx_submitted); 846 err = usb_submit_urb(_urb, GFP_ATOMIC); 847 if (err < 0) { 848 struct sk_buff *skb; 849 850 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 851 "Failed to submit urb\n"); 852 usb_unanchor_urb(_urb); 853 skb = (struct sk_buff *)_urb->context; 854 kfree_skb(skb); 855 } 856 usb_free_urb(_urb); 857 } 858 859 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb, 860 struct sk_buff *skb) 861 { 862 struct rtl_priv *rtlpriv = rtl_priv(hw); 863 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 864 struct ieee80211_tx_info *txinfo; 865 866 rtlusb->usb_tx_post_hdl(hw, urb, skb); 867 skb_pull(skb, RTL_TX_HEADER_SIZE); 868 txinfo = IEEE80211_SKB_CB(skb); 869 ieee80211_tx_info_clear_status(txinfo); 870 txinfo->flags |= IEEE80211_TX_STAT_ACK; 871 872 if (urb->status) { 873 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 874 "Urb has error status 0x%X\n", urb->status); 875 goto out; 876 } 877 /* TODO: statistics */ 878 out: 879 ieee80211_tx_status_irqsafe(hw, skb); 880 return urb->status; 881 } 882 883 static void _rtl_tx_complete(struct urb *urb) 884 { 885 struct sk_buff *skb = (struct sk_buff *)urb->context; 886 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 887 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0]; 888 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 889 int err; 890 891 if (unlikely(IS_USB_STOP(rtlusb))) 892 return; 893 err = _usb_tx_post(hw, urb, skb); 894 if (err) { 895 /* Ignore error and keep issuiing other urbs */ 896 return; 897 } 898 } 899 900 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw, 901 struct sk_buff *skb, u32 ep_num) 902 { 903 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 904 struct urb *_urb; 905 906 WARN_ON(NULL == skb); 907 _urb = usb_alloc_urb(0, GFP_ATOMIC); 908 if (!_urb) { 909 kfree_skb(skb); 910 return NULL; 911 } 912 _rtl_install_trx_info(rtlusb, skb, ep_num); 913 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev, 914 ep_num), skb->data, skb->len, _rtl_tx_complete, skb); 915 _urb->transfer_flags |= URB_ZERO_PACKET; 916 return _urb; 917 } 918 919 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb, 920 enum rtl_txq qnum) 921 { 922 struct rtl_priv *rtlpriv = rtl_priv(hw); 923 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 924 u32 ep_num; 925 struct urb *_urb = NULL; 926 struct sk_buff *_skb = NULL; 927 928 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl); 929 if (unlikely(IS_USB_STOP(rtlusb))) { 930 RT_TRACE(rtlpriv, COMP_USB, DBG_EMERG, 931 "USB device is stopping...\n"); 932 kfree_skb(skb); 933 return; 934 } 935 ep_num = rtlusb->ep_map.ep_mapping[qnum]; 936 _skb = skb; 937 _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num); 938 if (unlikely(!_urb)) { 939 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, 940 "Can't allocate urb. Drop skb!\n"); 941 kfree_skb(skb); 942 return; 943 } 944 _rtl_submit_tx_urb(hw, _urb); 945 } 946 947 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw, 948 struct ieee80211_sta *sta, 949 struct sk_buff *skb, 950 u16 hw_queue) 951 { 952 struct rtl_priv *rtlpriv = rtl_priv(hw); 953 struct rtl_mac *mac = rtl_mac(rtl_priv(hw)); 954 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 955 struct rtl_tx_desc *pdesc = NULL; 956 struct rtl_tcb_desc tcb_desc; 957 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); 958 __le16 fc = hdr->frame_control; 959 u8 *pda_addr = hdr->addr1; 960 /* ssn */ 961 u8 *qc = NULL; 962 u8 tid = 0; 963 u16 seq_number = 0; 964 965 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc)); 966 if (ieee80211_is_auth(fc)) { 967 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n"); 968 rtl_ips_nic_on(hw); 969 } 970 971 if (rtlpriv->psc.sw_ps_enabled) { 972 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) && 973 !ieee80211_has_pm(fc)) 974 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 975 } 976 977 rtl_action_proc(hw, skb, true); 978 if (is_multicast_ether_addr(pda_addr)) 979 rtlpriv->stats.txbytesmulticast += skb->len; 980 else if (is_broadcast_ether_addr(pda_addr)) 981 rtlpriv->stats.txbytesbroadcast += skb->len; 982 else 983 rtlpriv->stats.txbytesunicast += skb->len; 984 if (ieee80211_is_data_qos(fc)) { 985 qc = ieee80211_get_qos_ctl(hdr); 986 tid = qc[0] & IEEE80211_QOS_CTL_TID_MASK; 987 seq_number = (le16_to_cpu(hdr->seq_ctrl) & 988 IEEE80211_SCTL_SEQ) >> 4; 989 seq_number += 1; 990 seq_number <<= 4; 991 } 992 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb, 993 hw_queue, &tcb_desc); 994 if (!ieee80211_has_morefrags(hdr->frame_control)) { 995 if (qc) 996 mac->tids[tid].seq_number = seq_number; 997 } 998 if (ieee80211_is_data(fc)) 999 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX); 1000 } 1001 1002 static int rtl_usb_tx(struct ieee80211_hw *hw, 1003 struct ieee80211_sta *sta, 1004 struct sk_buff *skb, 1005 struct rtl_tcb_desc *dummy) 1006 { 1007 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 1008 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 1009 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); 1010 __le16 fc = hdr->frame_control; 1011 u16 hw_queue; 1012 1013 if (unlikely(is_hal_stop(rtlhal))) 1014 goto err_free; 1015 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb)); 1016 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue); 1017 _rtl_usb_transmit(hw, skb, hw_queue); 1018 return NETDEV_TX_OK; 1019 1020 err_free: 1021 dev_kfree_skb_any(skb); 1022 return NETDEV_TX_OK; 1023 } 1024 1025 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw, 1026 struct ieee80211_sta *sta, 1027 struct sk_buff *skb) 1028 { 1029 return false; 1030 } 1031 1032 static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work) 1033 { 1034 struct rtl_works *rtlworks = 1035 container_of(work, struct rtl_works, fill_h2c_cmd); 1036 struct ieee80211_hw *hw = rtlworks->hw; 1037 struct rtl_priv *rtlpriv = rtl_priv(hw); 1038 1039 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask); 1040 } 1041 1042 static const struct rtl_intf_ops rtl_usb_ops = { 1043 .adapter_start = rtl_usb_start, 1044 .adapter_stop = rtl_usb_stop, 1045 .adapter_tx = rtl_usb_tx, 1046 .waitq_insert = rtl_usb_tx_chk_waitq_insert, 1047 }; 1048 1049 int rtl_usb_probe(struct usb_interface *intf, 1050 const struct usb_device_id *id, 1051 struct rtl_hal_cfg *rtl_hal_cfg) 1052 { 1053 int err; 1054 struct ieee80211_hw *hw = NULL; 1055 struct rtl_priv *rtlpriv = NULL; 1056 struct usb_device *udev; 1057 struct rtl_usb_priv *usb_priv; 1058 1059 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) + 1060 sizeof(struct rtl_usb_priv), &rtl_ops); 1061 if (!hw) { 1062 RT_ASSERT(false, "ieee80211 alloc failed\n"); 1063 return -ENOMEM; 1064 } 1065 rtlpriv = hw->priv; 1066 rtlpriv->hw = hw; 1067 rtlpriv->usb_data = kzalloc(RTL_USB_MAX_RX_COUNT * sizeof(u32), 1068 GFP_KERNEL); 1069 if (!rtlpriv->usb_data) 1070 return -ENOMEM; 1071 1072 /* this spin lock must be initialized early */ 1073 spin_lock_init(&rtlpriv->locks.usb_lock); 1074 INIT_WORK(&rtlpriv->works.fill_h2c_cmd, 1075 rtl_fill_h2c_cmd_work_callback); 1076 INIT_WORK(&rtlpriv->works.lps_change_work, 1077 rtl_lps_change_work_callback); 1078 1079 rtlpriv->usb_data_index = 0; 1080 init_completion(&rtlpriv->firmware_loading_complete); 1081 SET_IEEE80211_DEV(hw, &intf->dev); 1082 udev = interface_to_usbdev(intf); 1083 usb_get_dev(udev); 1084 usb_priv = rtl_usbpriv(hw); 1085 memset(usb_priv, 0, sizeof(*usb_priv)); 1086 usb_priv->dev.intf = intf; 1087 usb_priv->dev.udev = udev; 1088 usb_set_intfdata(intf, hw); 1089 /* init cfg & intf_ops */ 1090 rtlpriv->rtlhal.interface = INTF_USB; 1091 rtlpriv->cfg = rtl_hal_cfg; 1092 rtlpriv->intf_ops = &rtl_usb_ops; 1093 rtl_dbgp_flag_init(hw); 1094 /* Init IO handler */ 1095 _rtl_usb_io_handler_init(&udev->dev, hw); 1096 rtlpriv->cfg->ops->read_chip_version(hw); 1097 /*like read eeprom and so on */ 1098 rtlpriv->cfg->ops->read_eeprom_info(hw); 1099 err = _rtl_usb_init(hw); 1100 if (err) 1101 goto error_out; 1102 rtl_usb_init_sw(hw); 1103 /* Init mac80211 sw */ 1104 err = rtl_init_core(hw); 1105 if (err) { 1106 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, 1107 "Can't allocate sw for mac80211\n"); 1108 goto error_out; 1109 } 1110 if (rtlpriv->cfg->ops->init_sw_vars(hw)) { 1111 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, "Can't init_sw_vars\n"); 1112 goto error_out; 1113 } 1114 rtlpriv->cfg->ops->init_sw_leds(hw); 1115 1116 err = ieee80211_register_hw(hw); 1117 if (err) { 1118 RT_TRACE(rtlpriv, COMP_ERR, DBG_EMERG, 1119 "Can't register mac80211 hw.\n"); 1120 err = -ENODEV; 1121 goto error_out; 1122 } 1123 rtlpriv->mac80211.mac80211_registered = 1; 1124 1125 set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status); 1126 return 0; 1127 1128 error_out: 1129 rtl_deinit_core(hw); 1130 _rtl_usb_io_handler_release(hw); 1131 usb_put_dev(udev); 1132 complete(&rtlpriv->firmware_loading_complete); 1133 return -ENODEV; 1134 } 1135 EXPORT_SYMBOL(rtl_usb_probe); 1136 1137 void rtl_usb_disconnect(struct usb_interface *intf) 1138 { 1139 struct ieee80211_hw *hw = usb_get_intfdata(intf); 1140 struct rtl_priv *rtlpriv = rtl_priv(hw); 1141 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw)); 1142 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 1143 1144 if (unlikely(!rtlpriv)) 1145 return; 1146 /* just in case driver is removed before firmware callback */ 1147 wait_for_completion(&rtlpriv->firmware_loading_complete); 1148 clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status); 1149 /*ieee80211_unregister_hw will call ops_stop */ 1150 if (rtlmac->mac80211_registered == 1) { 1151 ieee80211_unregister_hw(hw); 1152 rtlmac->mac80211_registered = 0; 1153 } else { 1154 rtl_deinit_deferred_work(hw); 1155 rtlpriv->intf_ops->adapter_stop(hw); 1156 } 1157 /*deinit rfkill */ 1158 /* rtl_deinit_rfkill(hw); */ 1159 rtl_usb_deinit(hw); 1160 rtl_deinit_core(hw); 1161 kfree(rtlpriv->usb_data); 1162 rtlpriv->cfg->ops->deinit_sw_leds(hw); 1163 rtlpriv->cfg->ops->deinit_sw_vars(hw); 1164 _rtl_usb_io_handler_release(hw); 1165 usb_put_dev(rtlusb->udev); 1166 usb_set_intfdata(intf, NULL); 1167 ieee80211_free_hw(hw); 1168 } 1169 EXPORT_SYMBOL(rtl_usb_disconnect); 1170 1171 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message) 1172 { 1173 return 0; 1174 } 1175 EXPORT_SYMBOL(rtl_usb_suspend); 1176 1177 int rtl_usb_resume(struct usb_interface *pusb_intf) 1178 { 1179 return 0; 1180 } 1181 EXPORT_SYMBOL(rtl_usb_resume); 1182