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 void *buf; 425 426 buf = usb_alloc_coherent(rtlusb->udev, rtlusb->rx_max_size, gfp_mask, 427 &urb->transfer_dma); 428 if (!buf) { 429 pr_err("Failed to usb_alloc_coherent!!\n"); 430 return -ENOMEM; 431 } 432 433 usb_fill_bulk_urb(urb, rtlusb->udev, 434 usb_rcvbulkpipe(rtlusb->udev, rtlusb->in_ep), 435 buf, rtlusb->rx_max_size, _rtl_rx_completed, rtlusb); 436 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 437 438 return 0; 439 } 440 441 static void _rtl_usb_rx_process_agg(struct ieee80211_hw *hw, 442 struct sk_buff *skb) 443 { 444 struct rtl_priv *rtlpriv = rtl_priv(hw); 445 u8 *rxdesc = skb->data; 446 struct ieee80211_hdr *hdr; 447 bool unicast = false; 448 __le16 fc; 449 struct ieee80211_rx_status rx_status = {0}; 450 struct rtl_stats stats = { 451 .signal = 0, 452 .rate = 0, 453 }; 454 455 skb_pull(skb, RTL_RX_DESC_SIZE); 456 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb); 457 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift)); 458 hdr = (struct ieee80211_hdr *)(skb->data); 459 fc = hdr->frame_control; 460 if (!stats.crc) { 461 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 462 463 if (is_broadcast_ether_addr(hdr->addr1)) { 464 /*TODO*/; 465 } else if (is_multicast_ether_addr(hdr->addr1)) { 466 /*TODO*/ 467 } else { 468 unicast = true; 469 rtlpriv->stats.rxbytesunicast += skb->len; 470 } 471 472 if (ieee80211_is_data(fc)) { 473 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX); 474 475 if (unicast) 476 rtlpriv->link_info.num_rx_inperiod++; 477 } 478 /* static bcn for roaming */ 479 rtl_beacon_statistic(hw, skb); 480 } 481 } 482 483 static void _rtl_usb_rx_process_noagg(struct ieee80211_hw *hw, 484 struct sk_buff *skb) 485 { 486 struct rtl_priv *rtlpriv = rtl_priv(hw); 487 u8 *rxdesc = skb->data; 488 struct ieee80211_hdr *hdr; 489 bool unicast = false; 490 __le16 fc; 491 struct ieee80211_rx_status rx_status = {0}; 492 struct rtl_stats stats = { 493 .signal = 0, 494 .rate = 0, 495 }; 496 497 skb_pull(skb, RTL_RX_DESC_SIZE); 498 rtlpriv->cfg->ops->query_rx_desc(hw, &stats, &rx_status, rxdesc, skb); 499 skb_pull(skb, (stats.rx_drvinfo_size + stats.rx_bufshift)); 500 hdr = (struct ieee80211_hdr *)(skb->data); 501 fc = hdr->frame_control; 502 if (!stats.crc) { 503 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status)); 504 505 if (is_broadcast_ether_addr(hdr->addr1)) { 506 /*TODO*/; 507 } else if (is_multicast_ether_addr(hdr->addr1)) { 508 /*TODO*/ 509 } else { 510 unicast = true; 511 rtlpriv->stats.rxbytesunicast += skb->len; 512 } 513 514 if (ieee80211_is_data(fc)) { 515 rtlpriv->cfg->ops->led_control(hw, LED_CTL_RX); 516 517 if (unicast) 518 rtlpriv->link_info.num_rx_inperiod++; 519 } 520 521 /* static bcn for roaming */ 522 rtl_beacon_statistic(hw, skb); 523 524 if (likely(rtl_action_proc(hw, skb, false))) 525 ieee80211_rx(hw, skb); 526 else 527 dev_kfree_skb_any(skb); 528 } else { 529 dev_kfree_skb_any(skb); 530 } 531 } 532 533 static void _rtl_rx_pre_process(struct ieee80211_hw *hw, struct sk_buff *skb) 534 { 535 struct sk_buff *_skb; 536 struct sk_buff_head rx_queue; 537 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 538 539 skb_queue_head_init(&rx_queue); 540 if (rtlusb->usb_rx_segregate_hdl) 541 rtlusb->usb_rx_segregate_hdl(hw, skb, &rx_queue); 542 WARN_ON(skb_queue_empty(&rx_queue)); 543 while (!skb_queue_empty(&rx_queue)) { 544 _skb = skb_dequeue(&rx_queue); 545 _rtl_usb_rx_process_agg(hw, _skb); 546 ieee80211_rx(hw, _skb); 547 } 548 } 549 550 #define __RX_SKB_MAX_QUEUED 64 551 552 static void _rtl_rx_work(unsigned long param) 553 { 554 struct rtl_usb *rtlusb = (struct rtl_usb *)param; 555 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 556 struct sk_buff *skb; 557 558 while ((skb = skb_dequeue(&rtlusb->rx_queue))) { 559 if (unlikely(IS_USB_STOP(rtlusb))) { 560 dev_kfree_skb_any(skb); 561 continue; 562 } 563 564 if (likely(!rtlusb->usb_rx_segregate_hdl)) { 565 _rtl_usb_rx_process_noagg(hw, skb); 566 } else { 567 /* TO DO */ 568 _rtl_rx_pre_process(hw, skb); 569 pr_err("rx agg not supported\n"); 570 } 571 } 572 } 573 574 static unsigned int _rtl_rx_get_padding(struct ieee80211_hdr *hdr, 575 unsigned int len) 576 { 577 #if NET_IP_ALIGN != 0 578 unsigned int padding = 0; 579 #endif 580 581 /* make function no-op when possible */ 582 if (NET_IP_ALIGN == 0 || len < sizeof(*hdr)) 583 return 0; 584 585 #if NET_IP_ALIGN != 0 586 /* alignment calculation as in lbtf_rx() / carl9170_rx_copy_data() */ 587 /* TODO: deduplicate common code, define helper function instead? */ 588 589 if (ieee80211_is_data_qos(hdr->frame_control)) { 590 u8 *qc = ieee80211_get_qos_ctl(hdr); 591 592 padding ^= NET_IP_ALIGN; 593 594 /* Input might be invalid, avoid accessing memory outside 595 * the buffer. 596 */ 597 if ((unsigned long)qc - (unsigned long)hdr < len && 598 *qc & IEEE80211_QOS_CTL_A_MSDU_PRESENT) 599 padding ^= NET_IP_ALIGN; 600 } 601 602 if (ieee80211_has_a4(hdr->frame_control)) 603 padding ^= NET_IP_ALIGN; 604 605 return padding; 606 #endif 607 } 608 609 #define __RADIO_TAP_SIZE_RSV 32 610 611 static void _rtl_rx_completed(struct urb *_urb) 612 { 613 struct rtl_usb *rtlusb = (struct rtl_usb *)_urb->context; 614 int err = 0; 615 616 if (unlikely(IS_USB_STOP(rtlusb))) 617 goto free; 618 619 if (likely(0 == _urb->status)) { 620 unsigned int padding; 621 struct sk_buff *skb; 622 unsigned int qlen; 623 unsigned int size = _urb->actual_length; 624 struct ieee80211_hdr *hdr; 625 626 if (size < RTL_RX_DESC_SIZE + sizeof(struct ieee80211_hdr)) { 627 pr_err("Too short packet from bulk IN! (len: %d)\n", 628 size); 629 goto resubmit; 630 } 631 632 qlen = skb_queue_len(&rtlusb->rx_queue); 633 if (qlen >= __RX_SKB_MAX_QUEUED) { 634 pr_err("Pending RX skbuff queue full! (qlen: %d)\n", 635 qlen); 636 goto resubmit; 637 } 638 639 hdr = (void *)(_urb->transfer_buffer + RTL_RX_DESC_SIZE); 640 padding = _rtl_rx_get_padding(hdr, size - RTL_RX_DESC_SIZE); 641 642 skb = dev_alloc_skb(size + __RADIO_TAP_SIZE_RSV + padding); 643 if (!skb) { 644 pr_err("Can't allocate skb for bulk IN!\n"); 645 goto resubmit; 646 } 647 648 _rtl_install_trx_info(rtlusb, skb, rtlusb->in_ep); 649 650 /* Make sure the payload data is 4 byte aligned. */ 651 skb_reserve(skb, padding); 652 653 /* reserve some space for mac80211's radiotap */ 654 skb_reserve(skb, __RADIO_TAP_SIZE_RSV); 655 656 skb_put_data(skb, _urb->transfer_buffer, size); 657 658 skb_queue_tail(&rtlusb->rx_queue, skb); 659 tasklet_schedule(&rtlusb->rx_work_tasklet); 660 661 goto resubmit; 662 } 663 664 switch (_urb->status) { 665 /* disconnect */ 666 case -ENOENT: 667 case -ECONNRESET: 668 case -ENODEV: 669 case -ESHUTDOWN: 670 goto free; 671 default: 672 break; 673 } 674 675 resubmit: 676 usb_anchor_urb(_urb, &rtlusb->rx_submitted); 677 err = usb_submit_urb(_urb, GFP_ATOMIC); 678 if (unlikely(err)) { 679 usb_unanchor_urb(_urb); 680 goto free; 681 } 682 return; 683 684 free: 685 /* On some architectures, usb_free_coherent must not be called from 686 * hardirq context. Queue urb to cleanup list. 687 */ 688 usb_anchor_urb(_urb, &rtlusb->rx_cleanup_urbs); 689 } 690 691 #undef __RADIO_TAP_SIZE_RSV 692 693 static void _rtl_usb_cleanup_rx(struct ieee80211_hw *hw) 694 { 695 struct rtl_priv *rtlpriv = rtl_priv(hw); 696 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 697 struct urb *urb; 698 699 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 700 701 tasklet_kill(&rtlusb->rx_work_tasklet); 702 cancel_work_sync(&rtlpriv->works.lps_change_work); 703 704 flush_workqueue(rtlpriv->works.rtl_wq); 705 destroy_workqueue(rtlpriv->works.rtl_wq); 706 707 skb_queue_purge(&rtlusb->rx_queue); 708 709 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { 710 usb_free_coherent(urb->dev, urb->transfer_buffer_length, 711 urb->transfer_buffer, urb->transfer_dma); 712 usb_free_urb(urb); 713 } 714 } 715 716 static int _rtl_usb_receive(struct ieee80211_hw *hw) 717 { 718 struct urb *urb; 719 int err; 720 int i; 721 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 722 723 WARN_ON(0 == rtlusb->rx_urb_num); 724 /* 1600 == 1514 + max WLAN header + rtk info */ 725 WARN_ON(rtlusb->rx_max_size < 1600); 726 727 for (i = 0; i < rtlusb->rx_urb_num; i++) { 728 err = -ENOMEM; 729 urb = usb_alloc_urb(0, GFP_KERNEL); 730 if (!urb) 731 goto err_out; 732 733 err = _rtl_prep_rx_urb(hw, rtlusb, urb, GFP_KERNEL); 734 if (err < 0) { 735 pr_err("Failed to prep_rx_urb!!\n"); 736 usb_free_urb(urb); 737 goto err_out; 738 } 739 740 usb_anchor_urb(urb, &rtlusb->rx_submitted); 741 err = usb_submit_urb(urb, GFP_KERNEL); 742 if (err) 743 goto err_out; 744 usb_free_urb(urb); 745 } 746 return 0; 747 748 err_out: 749 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 750 _rtl_usb_cleanup_rx(hw); 751 return err; 752 } 753 754 static int rtl_usb_start(struct ieee80211_hw *hw) 755 { 756 int err; 757 struct rtl_priv *rtlpriv = rtl_priv(hw); 758 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 759 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 760 761 err = rtlpriv->cfg->ops->hw_init(hw); 762 if (!err) { 763 rtl_init_rx_config(hw); 764 765 /* Enable software */ 766 SET_USB_START(rtlusb); 767 /* should after adapter start and interrupt enable. */ 768 set_hal_start(rtlhal); 769 770 /* Start bulk IN */ 771 err = _rtl_usb_receive(hw); 772 } 773 774 return err; 775 } 776 /** 777 * 778 * 779 */ 780 781 /*======================= tx =========================================*/ 782 static void rtl_usb_cleanup(struct ieee80211_hw *hw) 783 { 784 u32 i; 785 struct sk_buff *_skb; 786 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 787 struct ieee80211_tx_info *txinfo; 788 789 /* clean up rx stuff. */ 790 _rtl_usb_cleanup_rx(hw); 791 792 /* clean up tx stuff */ 793 for (i = 0; i < RTL_USB_MAX_EP_NUM; i++) { 794 while ((_skb = skb_dequeue(&rtlusb->tx_skb_queue[i]))) { 795 rtlusb->usb_tx_cleanup(hw, _skb); 796 txinfo = IEEE80211_SKB_CB(_skb); 797 ieee80211_tx_info_clear_status(txinfo); 798 txinfo->flags |= IEEE80211_TX_STAT_ACK; 799 ieee80211_tx_status_irqsafe(hw, _skb); 800 } 801 usb_kill_anchored_urbs(&rtlusb->tx_pending[i]); 802 } 803 usb_kill_anchored_urbs(&rtlusb->tx_submitted); 804 } 805 806 /** 807 * 808 * We may add some struct into struct rtl_usb later. Do deinit here. 809 * 810 */ 811 static void rtl_usb_deinit(struct ieee80211_hw *hw) 812 { 813 rtl_usb_cleanup(hw); 814 } 815 816 static void rtl_usb_stop(struct ieee80211_hw *hw) 817 { 818 struct rtl_priv *rtlpriv = rtl_priv(hw); 819 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 820 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 821 struct urb *urb; 822 823 /* should after adapter start and interrupt enable. */ 824 set_hal_stop(rtlhal); 825 cancel_work_sync(&rtlpriv->works.fill_h2c_cmd); 826 /* Enable software */ 827 SET_USB_STOP(rtlusb); 828 829 /* free pre-allocated URBs from rtl_usb_start() */ 830 usb_kill_anchored_urbs(&rtlusb->rx_submitted); 831 832 tasklet_kill(&rtlusb->rx_work_tasklet); 833 cancel_work_sync(&rtlpriv->works.lps_change_work); 834 835 flush_workqueue(rtlpriv->works.rtl_wq); 836 837 skb_queue_purge(&rtlusb->rx_queue); 838 839 while ((urb = usb_get_from_anchor(&rtlusb->rx_cleanup_urbs))) { 840 usb_free_coherent(urb->dev, urb->transfer_buffer_length, 841 urb->transfer_buffer, urb->transfer_dma); 842 usb_free_urb(urb); 843 } 844 845 rtlpriv->cfg->ops->hw_disable(hw); 846 } 847 848 static void _rtl_submit_tx_urb(struct ieee80211_hw *hw, struct urb *_urb) 849 { 850 int err; 851 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 852 853 usb_anchor_urb(_urb, &rtlusb->tx_submitted); 854 err = usb_submit_urb(_urb, GFP_ATOMIC); 855 if (err < 0) { 856 struct sk_buff *skb; 857 858 pr_err("Failed to submit urb\n"); 859 usb_unanchor_urb(_urb); 860 skb = (struct sk_buff *)_urb->context; 861 kfree_skb(skb); 862 } 863 usb_free_urb(_urb); 864 } 865 866 static int _usb_tx_post(struct ieee80211_hw *hw, struct urb *urb, 867 struct sk_buff *skb) 868 { 869 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 870 struct ieee80211_tx_info *txinfo; 871 872 rtlusb->usb_tx_post_hdl(hw, urb, skb); 873 skb_pull(skb, RTL_TX_HEADER_SIZE); 874 txinfo = IEEE80211_SKB_CB(skb); 875 ieee80211_tx_info_clear_status(txinfo); 876 txinfo->flags |= IEEE80211_TX_STAT_ACK; 877 878 if (urb->status) { 879 pr_err("Urb has error status 0x%X\n", urb->status); 880 goto out; 881 } 882 /* TODO: statistics */ 883 out: 884 ieee80211_tx_status_irqsafe(hw, skb); 885 return urb->status; 886 } 887 888 static void _rtl_tx_complete(struct urb *urb) 889 { 890 struct sk_buff *skb = (struct sk_buff *)urb->context; 891 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 892 struct rtl_usb *rtlusb = (struct rtl_usb *)info->rate_driver_data[0]; 893 struct ieee80211_hw *hw = usb_get_intfdata(rtlusb->intf); 894 int err; 895 896 if (unlikely(IS_USB_STOP(rtlusb))) 897 return; 898 err = _usb_tx_post(hw, urb, skb); 899 if (err) { 900 /* Ignore error and keep issuiing other urbs */ 901 return; 902 } 903 } 904 905 static struct urb *_rtl_usb_tx_urb_setup(struct ieee80211_hw *hw, 906 struct sk_buff *skb, u32 ep_num) 907 { 908 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 909 struct urb *_urb; 910 911 WARN_ON(NULL == skb); 912 _urb = usb_alloc_urb(0, GFP_ATOMIC); 913 if (!_urb) { 914 kfree_skb(skb); 915 return NULL; 916 } 917 _rtl_install_trx_info(rtlusb, skb, ep_num); 918 usb_fill_bulk_urb(_urb, rtlusb->udev, usb_sndbulkpipe(rtlusb->udev, 919 ep_num), skb->data, skb->len, _rtl_tx_complete, skb); 920 _urb->transfer_flags |= URB_ZERO_PACKET; 921 return _urb; 922 } 923 924 static void _rtl_usb_transmit(struct ieee80211_hw *hw, struct sk_buff *skb, 925 enum rtl_txq qnum) 926 { 927 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 928 u32 ep_num; 929 struct urb *_urb = NULL; 930 struct sk_buff *_skb = NULL; 931 932 WARN_ON(NULL == rtlusb->usb_tx_aggregate_hdl); 933 if (unlikely(IS_USB_STOP(rtlusb))) { 934 pr_err("USB device is stopping...\n"); 935 kfree_skb(skb); 936 return; 937 } 938 ep_num = rtlusb->ep_map.ep_mapping[qnum]; 939 _skb = skb; 940 _urb = _rtl_usb_tx_urb_setup(hw, _skb, ep_num); 941 if (unlikely(!_urb)) { 942 pr_err("Can't allocate urb. Drop skb!\n"); 943 kfree_skb(skb); 944 return; 945 } 946 _rtl_submit_tx_urb(hw, _urb); 947 } 948 949 static void _rtl_usb_tx_preprocess(struct ieee80211_hw *hw, 950 struct ieee80211_sta *sta, 951 struct sk_buff *skb, 952 u16 hw_queue) 953 { 954 struct rtl_priv *rtlpriv = rtl_priv(hw); 955 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); 956 struct rtl_tx_desc *pdesc = NULL; 957 struct rtl_tcb_desc tcb_desc; 958 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); 959 __le16 fc = hdr->frame_control; 960 u8 *pda_addr = hdr->addr1; 961 962 memset(&tcb_desc, 0, sizeof(struct rtl_tcb_desc)); 963 if (ieee80211_is_auth(fc)) { 964 RT_TRACE(rtlpriv, COMP_SEND, DBG_DMESG, "MAC80211_LINKING\n"); 965 } 966 967 if (rtlpriv->psc.sw_ps_enabled) { 968 if (ieee80211_is_data(fc) && !ieee80211_is_nullfunc(fc) && 969 !ieee80211_has_pm(fc)) 970 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 971 } 972 973 rtl_action_proc(hw, skb, true); 974 if (is_multicast_ether_addr(pda_addr)) 975 rtlpriv->stats.txbytesmulticast += skb->len; 976 else if (is_broadcast_ether_addr(pda_addr)) 977 rtlpriv->stats.txbytesbroadcast += skb->len; 978 else 979 rtlpriv->stats.txbytesunicast += skb->len; 980 rtlpriv->cfg->ops->fill_tx_desc(hw, hdr, (u8 *)pdesc, NULL, info, sta, skb, 981 hw_queue, &tcb_desc); 982 if (ieee80211_is_data(fc)) 983 rtlpriv->cfg->ops->led_control(hw, LED_CTL_TX); 984 } 985 986 static int rtl_usb_tx(struct ieee80211_hw *hw, 987 struct ieee80211_sta *sta, 988 struct sk_buff *skb, 989 struct rtl_tcb_desc *dummy) 990 { 991 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 992 struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw)); 993 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data); 994 __le16 fc = hdr->frame_control; 995 u16 hw_queue; 996 997 if (unlikely(is_hal_stop(rtlhal))) 998 goto err_free; 999 hw_queue = rtlusb->usb_mq_to_hwq(fc, skb_get_queue_mapping(skb)); 1000 _rtl_usb_tx_preprocess(hw, sta, skb, hw_queue); 1001 _rtl_usb_transmit(hw, skb, hw_queue); 1002 return NETDEV_TX_OK; 1003 1004 err_free: 1005 dev_kfree_skb_any(skb); 1006 return NETDEV_TX_OK; 1007 } 1008 1009 static bool rtl_usb_tx_chk_waitq_insert(struct ieee80211_hw *hw, 1010 struct ieee80211_sta *sta, 1011 struct sk_buff *skb) 1012 { 1013 return false; 1014 } 1015 1016 static void rtl_fill_h2c_cmd_work_callback(struct work_struct *work) 1017 { 1018 struct rtl_works *rtlworks = 1019 container_of(work, struct rtl_works, fill_h2c_cmd); 1020 struct ieee80211_hw *hw = rtlworks->hw; 1021 struct rtl_priv *rtlpriv = rtl_priv(hw); 1022 1023 rtlpriv->cfg->ops->fill_h2c_cmd(hw, H2C_RA_MASK, 5, rtlpriv->rate_mask); 1024 } 1025 1026 static const struct rtl_intf_ops rtl_usb_ops = { 1027 .adapter_start = rtl_usb_start, 1028 .adapter_stop = rtl_usb_stop, 1029 .adapter_tx = rtl_usb_tx, 1030 .waitq_insert = rtl_usb_tx_chk_waitq_insert, 1031 }; 1032 1033 int rtl_usb_probe(struct usb_interface *intf, 1034 const struct usb_device_id *id, 1035 struct rtl_hal_cfg *rtl_hal_cfg) 1036 { 1037 int err; 1038 struct ieee80211_hw *hw = NULL; 1039 struct rtl_priv *rtlpriv = NULL; 1040 struct usb_device *udev; 1041 struct rtl_usb_priv *usb_priv; 1042 1043 hw = ieee80211_alloc_hw(sizeof(struct rtl_priv) + 1044 sizeof(struct rtl_usb_priv), &rtl_ops); 1045 if (!hw) { 1046 WARN_ONCE(true, "rtl_usb: ieee80211 alloc failed\n"); 1047 return -ENOMEM; 1048 } 1049 rtlpriv = hw->priv; 1050 rtlpriv->hw = hw; 1051 rtlpriv->usb_data = kcalloc(RTL_USB_MAX_RX_COUNT, sizeof(u32), 1052 GFP_KERNEL); 1053 if (!rtlpriv->usb_data) 1054 return -ENOMEM; 1055 1056 /* this spin lock must be initialized early */ 1057 spin_lock_init(&rtlpriv->locks.usb_lock); 1058 INIT_WORK(&rtlpriv->works.fill_h2c_cmd, 1059 rtl_fill_h2c_cmd_work_callback); 1060 INIT_WORK(&rtlpriv->works.lps_change_work, 1061 rtl_lps_change_work_callback); 1062 1063 rtlpriv->usb_data_index = 0; 1064 init_completion(&rtlpriv->firmware_loading_complete); 1065 SET_IEEE80211_DEV(hw, &intf->dev); 1066 udev = interface_to_usbdev(intf); 1067 usb_get_dev(udev); 1068 usb_priv = rtl_usbpriv(hw); 1069 memset(usb_priv, 0, sizeof(*usb_priv)); 1070 usb_priv->dev.intf = intf; 1071 usb_priv->dev.udev = udev; 1072 usb_set_intfdata(intf, hw); 1073 /* init cfg & intf_ops */ 1074 rtlpriv->rtlhal.interface = INTF_USB; 1075 rtlpriv->cfg = rtl_hal_cfg; 1076 rtlpriv->intf_ops = &rtl_usb_ops; 1077 /* Init IO handler */ 1078 _rtl_usb_io_handler_init(&udev->dev, hw); 1079 rtlpriv->cfg->ops->read_chip_version(hw); 1080 /*like read eeprom and so on */ 1081 rtlpriv->cfg->ops->read_eeprom_info(hw); 1082 err = _rtl_usb_init(hw); 1083 if (err) 1084 goto error_out; 1085 rtl_usb_init_sw(hw); 1086 /* Init mac80211 sw */ 1087 err = rtl_init_core(hw); 1088 if (err) { 1089 pr_err("Can't allocate sw for mac80211\n"); 1090 goto error_out; 1091 } 1092 if (rtlpriv->cfg->ops->init_sw_vars(hw)) { 1093 pr_err("Can't init_sw_vars\n"); 1094 goto error_out; 1095 } 1096 rtlpriv->cfg->ops->init_sw_leds(hw); 1097 1098 err = ieee80211_register_hw(hw); 1099 if (err) { 1100 pr_err("Can't register mac80211 hw.\n"); 1101 err = -ENODEV; 1102 goto error_out; 1103 } 1104 rtlpriv->mac80211.mac80211_registered = 1; 1105 1106 set_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status); 1107 return 0; 1108 1109 error_out: 1110 rtl_deinit_core(hw); 1111 _rtl_usb_io_handler_release(hw); 1112 usb_put_dev(udev); 1113 complete(&rtlpriv->firmware_loading_complete); 1114 return -ENODEV; 1115 } 1116 EXPORT_SYMBOL(rtl_usb_probe); 1117 1118 void rtl_usb_disconnect(struct usb_interface *intf) 1119 { 1120 struct ieee80211_hw *hw = usb_get_intfdata(intf); 1121 struct rtl_priv *rtlpriv = rtl_priv(hw); 1122 struct rtl_mac *rtlmac = rtl_mac(rtl_priv(hw)); 1123 struct rtl_usb *rtlusb = rtl_usbdev(rtl_usbpriv(hw)); 1124 1125 if (unlikely(!rtlpriv)) 1126 return; 1127 /* just in case driver is removed before firmware callback */ 1128 wait_for_completion(&rtlpriv->firmware_loading_complete); 1129 clear_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status); 1130 /*ieee80211_unregister_hw will call ops_stop */ 1131 if (rtlmac->mac80211_registered == 1) { 1132 ieee80211_unregister_hw(hw); 1133 rtlmac->mac80211_registered = 0; 1134 } else { 1135 rtl_deinit_deferred_work(hw, false); 1136 rtlpriv->intf_ops->adapter_stop(hw); 1137 } 1138 /*deinit rfkill */ 1139 /* rtl_deinit_rfkill(hw); */ 1140 rtl_usb_deinit(hw); 1141 rtl_deinit_core(hw); 1142 kfree(rtlpriv->usb_data); 1143 rtlpriv->cfg->ops->deinit_sw_leds(hw); 1144 rtlpriv->cfg->ops->deinit_sw_vars(hw); 1145 _rtl_usb_io_handler_release(hw); 1146 usb_put_dev(rtlusb->udev); 1147 usb_set_intfdata(intf, NULL); 1148 ieee80211_free_hw(hw); 1149 } 1150 EXPORT_SYMBOL(rtl_usb_disconnect); 1151 1152 int rtl_usb_suspend(struct usb_interface *pusb_intf, pm_message_t message) 1153 { 1154 return 0; 1155 } 1156 EXPORT_SYMBOL(rtl_usb_suspend); 1157 1158 int rtl_usb_resume(struct usb_interface *pusb_intf) 1159 { 1160 return 0; 1161 } 1162 EXPORT_SYMBOL(rtl_usb_resume); 1163