drivers/staging/vt6656/main_usb.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
   4  * All rights reserved.
   5  *
   6  * File: main_usb.c
   7  *
   8  * Purpose: driver entry for initial, open, close, tx and rx.
   9  *
  10  * Author: Lyndon Chen
  11  *
  12  * Date: Dec 8, 2005
  13  *
  14  * Functions:
  15  *
  16  *   vt6656_probe - module initial (insmod) driver entry
  17  *   vnt_free_tx_bufs - free tx buffer function
  18  *   vnt_init_registers- initial MAC & BBP & RF internal registers.
  19  *
  20  * Revision History:
  21  */
  22 #undef __NO_VERSION__
  23
  24 #include <linux/etherdevice.h>
  25 #include <linux/file.h>
  26 #include "device.h"
  27 #include "card.h"
  28 #include "baseband.h"
  29 #include "mac.h"
  30 #include "power.h"
  31 #include "wcmd.h"
  32 #include "rxtx.h"
  33 #include "dpc.h"
  34 #include "rf.h"
  35 #include "firmware.h"
  36 #include "usbpipe.h"
  37 #include "channel.h"
  38 #include "int.h"
  39
  40 /*
  41  * define module options
  42  */
  43
  44 /* version information */
  45 #define DRIVER_AUTHOR \
  46         "VIA Networking Technologies, Inc., <lyndonchen@vntek.com.tw>"
  47 MODULE_AUTHOR(DRIVER_AUTHOR);
  48 MODULE_LICENSE("GPL");
  49 MODULE_DESCRIPTION(DEVICE_FULL_DRV_NAM);
  50
  51 #define RX_DESC_DEF0 64
  52 static int vnt_rx_buffers = RX_DESC_DEF0;
  53 module_param_named(rx_buffers, vnt_rx_buffers, int, 0644);
  54 MODULE_PARM_DESC(rx_buffers, "Number of receive usb rx buffers");
  55
  56 #define TX_DESC_DEF0 64
  57 static int vnt_tx_buffers = TX_DESC_DEF0;
  58 module_param_named(tx_buffers, vnt_tx_buffers, int, 0644);
  59 MODULE_PARM_DESC(tx_buffers, "Number of receive usb tx buffers");
  60
  61 #define RTS_THRESH_DEF     2347
  62 #define FRAG_THRESH_DEF     2346
  63 #define SHORT_RETRY_DEF     8
  64 #define LONG_RETRY_DEF     4
  65
  66 /* BasebandType[] baseband type selected
  67  * 0: indicate 802.11a type
  68  * 1: indicate 802.11b type
  69  * 2: indicate 802.11g type
  70  */
  71
  72 #define BBP_TYPE_DEF     2
  73
  74 /*
  75  * Static vars definitions
  76  */
  77
  78 static const struct usb_device_id vt6656_table[] = {
  79         {USB_DEVICE(VNT_USB_VENDOR_ID, VNT_USB_PRODUCT_ID)},
  80         {}
  81 };
  82
  83 static void vnt_set_options(struct vnt_private *priv)
  84 {
  85         /* Set number of TX buffers */
  86         if (vnt_tx_buffers < CB_MIN_TX_DESC || vnt_tx_buffers > CB_MAX_TX_DESC)
  87                 priv->num_tx_context = TX_DESC_DEF0;
  88         else
  89                 priv->num_tx_context = vnt_tx_buffers;
  90
  91         /* Set number of RX buffers */
  92         if (vnt_rx_buffers < CB_MIN_RX_DESC || vnt_rx_buffers > CB_MAX_RX_DESC)
  93                 priv->num_rcb = RX_DESC_DEF0;
  94         else
  95                 priv->num_rcb = vnt_rx_buffers;
  96
  97         priv->short_retry_limit = SHORT_RETRY_DEF;
  98         priv->long_retry_limit = LONG_RETRY_DEF;
  99         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
 100         priv->bb_type = BBP_TYPE_DEF;
 101         priv->packet_type = priv->bb_type;
 102         priv->auto_fb_ctrl = AUTO_FB_0;
 103         priv->preamble_type = 0;
 104         priv->exist_sw_net_addr = false;
 105 }
 106
 107 /*
 108  * initialization of MAC & BBP registers
 109  */
 110 static int vnt_init_registers(struct vnt_private *priv)
 111 {
 112         int ret = 0;
 113         struct vnt_cmd_card_init *init_cmd = &priv->init_command;
 114         struct vnt_rsp_card_init *init_rsp = &priv->init_response;
 115         u8 antenna;
 116         int ii;
 117         u8 tmp;
 118         u8 calib_tx_iq = 0, calib_tx_dc = 0, calib_rx_iq = 0;
 119
 120         dev_dbg(&priv->usb->dev, "---->INIbInitAdapter. [%d][%d]\n",
 121                 DEVICE_INIT_COLD, priv->packet_type);
 122
 123         ret = vnt_check_firmware_version(priv);
 124         if (ret) {
 125                 ret = vnt_download_firmware(priv);
 126                 if (ret) {
 127                         dev_dbg(&priv->usb->dev,
 128                                 "Could not download firmware: %d.\n", ret);
 129                         goto end;
 130                 }
 131
 132                 ret = vnt_firmware_branch_to_sram(priv);
 133                 if (ret) {
 134                         dev_dbg(&priv->usb->dev,
 135                                 "Could not branch to SRAM: %d.\n", ret);
 136                         goto end;
 137                 }
 138         }
 139
 140         ret = vnt_vt3184_init(priv);
 141         if (ret) {
 142                 dev_dbg(&priv->usb->dev, "vnt_vt3184_init fail\n");
 143                 goto end;
 144         }
 145
 146         init_cmd->init_class = DEVICE_INIT_COLD;
 147         init_cmd->exist_sw_net_addr = priv->exist_sw_net_addr;
 148         for (ii = 0; ii < 6; ii++)
 149                 init_cmd->sw_net_addr[ii] = priv->current_net_addr[ii];
 150         init_cmd->short_retry_limit = priv->short_retry_limit;
 151         init_cmd->long_retry_limit = priv->long_retry_limit;
 152
 153         /* issue card_init command to device */
 154         ret = vnt_control_out(priv, MESSAGE_TYPE_CARDINIT, 0, 0,
 155                               sizeof(struct vnt_cmd_card_init),
 156                               (u8 *)init_cmd);
 157         if (ret) {
 158                 dev_dbg(&priv->usb->dev, "Issue Card init fail\n");
 159                 goto end;
 160         }
 161
 162         ret = vnt_control_in(priv, MESSAGE_TYPE_INIT_RSP, 0, 0,
 163                              sizeof(struct vnt_rsp_card_init),
 164                              (u8 *)init_rsp);
 165         if (ret) {
 166                 dev_dbg(&priv->usb->dev, "Cardinit request in status fail!\n");
 167                 goto end;
 168         }
 169
 170         /* local ID for AES functions */
 171         ret = vnt_control_in(priv, MESSAGE_TYPE_READ, MAC_REG_LOCALID,
 172                              MESSAGE_REQUEST_MACREG, 1, &priv->local_id);
 173         if (ret)
 174                 goto end;
 175
 176         /* do MACbSoftwareReset in MACvInitialize */
 177
 178         priv->top_ofdm_basic_rate = RATE_24M;
 179         priv->top_cck_basic_rate = RATE_1M;
 180
 181         /* target to IF pin while programming to RF chip */
 182         priv->power = 0xFF;
 183
 184         priv->cck_pwr = priv->eeprom[EEP_OFS_PWR_CCK];
 185         priv->ofdm_pwr_g = priv->eeprom[EEP_OFS_PWR_OFDMG];
 186         /* load power table */
 187         for (ii = 0; ii < 14; ii++) {
 188                 priv->cck_pwr_tbl[ii] =
 189                         priv->eeprom[ii + EEP_OFS_CCK_PWR_TBL];
 190                 if (priv->cck_pwr_tbl[ii] == 0)
 191                         priv->cck_pwr_tbl[ii] = priv->cck_pwr;
 192
 193                 priv->ofdm_pwr_tbl[ii] =
 194                                 priv->eeprom[ii + EEP_OFS_OFDM_PWR_TBL];
 195                 if (priv->ofdm_pwr_tbl[ii] == 0)
 196                         priv->ofdm_pwr_tbl[ii] = priv->ofdm_pwr_g;
 197         }
 198
 199         /*
 200          * original zonetype is USA, but custom zonetype is Europe,
 201          * then need to recover 12, 13, 14 channels with 11 channel
 202          */
 203         for (ii = 11; ii < 14; ii++) {
 204                 priv->cck_pwr_tbl[ii] = priv->cck_pwr_tbl[10];
 205                 priv->ofdm_pwr_tbl[ii] = priv->ofdm_pwr_tbl[10];
 206         }
 207
 208         priv->ofdm_pwr_a = 0x34; /* same as RFbMA2829SelectChannel */
 209
 210         /* load OFDM A power table */
 211         for (ii = 0; ii < CB_MAX_CHANNEL_5G; ii++) {
 212                 priv->ofdm_a_pwr_tbl[ii] =
 213                         priv->eeprom[ii + EEP_OFS_OFDMA_PWR_TBL];
 214
 215                 if (priv->ofdm_a_pwr_tbl[ii] == 0)
 216                         priv->ofdm_a_pwr_tbl[ii] = priv->ofdm_pwr_a;
 217         }
 218
 219         antenna = priv->eeprom[EEP_OFS_ANTENNA];
 220
 221         if (antenna & EEP_ANTINV)
 222                 priv->tx_rx_ant_inv = true;
 223         else
 224                 priv->tx_rx_ant_inv = false;
 225
 226         antenna &= (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
 227
 228         if (antenna == 0) /* if not set default is both */
 229                 antenna = (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
 230
 231         if (antenna == (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN)) {
 232                 priv->tx_antenna_mode = ANT_B;
 233                 priv->rx_antenna_sel = 1;
 234
 235                 if (priv->tx_rx_ant_inv)
 236                         priv->rx_antenna_mode = ANT_A;
 237                 else
 238                         priv->rx_antenna_mode = ANT_B;
 239         } else  {
 240                 priv->rx_antenna_sel = 0;
 241
 242                 if (antenna & EEP_ANTENNA_AUX) {
 243                         priv->tx_antenna_mode = ANT_A;
 244
 245                         if (priv->tx_rx_ant_inv)
 246                                 priv->rx_antenna_mode = ANT_B;
 247                         else
 248                                 priv->rx_antenna_mode = ANT_A;
 249                 } else {
 250                         priv->tx_antenna_mode = ANT_B;
 251
 252                 if (priv->tx_rx_ant_inv)
 253                         priv->rx_antenna_mode = ANT_A;
 254                 else
 255                         priv->rx_antenna_mode = ANT_B;
 256                 }
 257         }
 258
 259         /* Set initial antenna mode */
 260         ret = vnt_set_antenna_mode(priv, priv->rx_antenna_mode);
 261         if (ret)
 262                 goto end;
 263
 264         /* get Auto Fall Back type */
 265         priv->auto_fb_ctrl = AUTO_FB_0;
 266
 267         /* default Auto Mode */
 268         priv->bb_type = BB_TYPE_11G;
 269
 270         /* get RFType */
 271         priv->rf_type = init_rsp->rf_type;
 272
 273         /* load vt3266 calibration parameters in EEPROM */
 274         if (priv->rf_type == RF_VT3226D0) {
 275                 if ((priv->eeprom[EEP_OFS_MAJOR_VER] == 0x1) &&
 276                     (priv->eeprom[EEP_OFS_MINOR_VER] >= 0x4)) {
 277                         calib_tx_iq = priv->eeprom[EEP_OFS_CALIB_TX_IQ];
 278                         calib_tx_dc = priv->eeprom[EEP_OFS_CALIB_TX_DC];
 279                         calib_rx_iq = priv->eeprom[EEP_OFS_CALIB_RX_IQ];
 280                         if (calib_tx_iq || calib_tx_dc || calib_rx_iq) {
 281                                 /* CR255, enable TX/RX IQ and
 282                                  * DC compensation mode
 283                                  */
 284                                 ret = vnt_control_out_u8(priv,
 285                                                          MESSAGE_REQUEST_BBREG,
 286                                                          0xff, 0x03);
 287                                 if (ret)
 288                                         goto end;
 289
 290                                 /* CR251, TX I/Q Imbalance Calibration */
 291                                 ret = vnt_control_out_u8(priv,
 292                                                          MESSAGE_REQUEST_BBREG,
 293                                                          0xfb, calib_tx_iq);
 294                                 if (ret)
 295                                         goto end;
 296
 297                                 /* CR252, TX DC-Offset Calibration */
 298                                 ret = vnt_control_out_u8(priv,
 299                                                          MESSAGE_REQUEST_BBREG,
 300                                                          0xfC, calib_tx_dc);
 301                                 if (ret)
 302                                         goto end;
 303
 304                                 /* CR253, RX I/Q Imbalance Calibration */
 305                                 ret = vnt_control_out_u8(priv,
 306                                                          MESSAGE_REQUEST_BBREG,
 307                                                          0xfd, calib_rx_iq);
 308                                 if (ret)
 309                                         goto end;
 310                         } else {
 311                                 /* CR255, turn off
 312                                  * BB Calibration compensation
 313                                  */
 314                                 ret = vnt_control_out_u8(priv,
 315                                                          MESSAGE_REQUEST_BBREG,
 316                                                          0xff, 0x0);
 317                                 if (ret)
 318                                         goto end;
 319                         }
 320                 }
 321         }
 322
 323         /* get permanent network address */
 324         memcpy(priv->permanent_net_addr, init_rsp->net_addr, 6);
 325         ether_addr_copy(priv->current_net_addr, priv->permanent_net_addr);
 326
 327         /* if exist SW network address, use it */
 328         dev_dbg(&priv->usb->dev, "Network address = %pM\n",
 329                 priv->current_net_addr);
 330
 331         /*
 332          * set BB and packet type at the same time
 333          * set Short Slot Time, xIFS, and RSPINF
 334          */
 335         if (priv->bb_type == BB_TYPE_11A)
 336                 priv->short_slot_time = true;
 337         else
 338                 priv->short_slot_time = false;
 339
 340         ret = vnt_set_short_slot_time(priv);
 341         if (ret)
 342                 goto end;
 343
 344         priv->radio_ctl = priv->eeprom[EEP_OFS_RADIOCTL];
 345
 346         if ((priv->radio_ctl & EEP_RADIOCTL_ENABLE) != 0) {
 347                 ret = vnt_control_in(priv, MESSAGE_TYPE_READ,
 348                                      MAC_REG_GPIOCTL1, MESSAGE_REQUEST_MACREG,
 349                                      1, &tmp);
 350                 if (ret)
 351                         goto end;
 352
 353                 if ((tmp & GPIO3_DATA) == 0) {
 354                         ret = vnt_mac_reg_bits_on(priv, MAC_REG_GPIOCTL1,
 355                                                   GPIO3_INTMD);
 356                 } else {
 357                         ret = vnt_mac_reg_bits_off(priv, MAC_REG_GPIOCTL1,
 358                                                    GPIO3_INTMD);
 359                 }
 360
 361                 if (ret)
 362                         goto end;
 363         }
 364
 365
 366         ret = vnt_mac_set_led(priv, LEDSTS_TMLEN, 0x38);
 367         if (ret)
 368                 goto end;
 369
 370         ret = vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_SLOW);
 371         if (ret)
 372                 goto end;
 373
 374         ret = vnt_mac_reg_bits_on(priv, MAC_REG_GPIOCTL0, 0x01);
 375         if (ret)
 376                 goto end;
 377
 378         ret = vnt_radio_power_on(priv);
 379         if (ret)
 380                 goto end;
 381
 382         dev_dbg(&priv->usb->dev, "<----INIbInitAdapter Exit\n");
 383
 384 end:
 385         return ret;
 386 }
 387
 388 static void vnt_free_tx_bufs(struct vnt_private *priv)
 389 {
 390         struct vnt_usb_send_context *tx_context;
 391         int ii;
 392
 393         for (ii = 0; ii < priv->num_tx_context; ii++) {
 394                 tx_context = priv->tx_context[ii];
 395                 if (!tx_context)
 396                         continue;
 397
 398                 /* deallocate URBs */
 399                 if (tx_context->urb) {
 400                         usb_kill_urb(tx_context->urb);
 401                         usb_free_urb(tx_context->urb);
 402                 }
 403
 404                 kfree(tx_context);
 405         }
 406 }
 407
 408 static void vnt_free_rx_bufs(struct vnt_private *priv)
 409 {
 410         struct vnt_rcb *rcb;
 411         int ii;
 412
 413         for (ii = 0; ii < priv->num_rcb; ii++) {
 414                 rcb = priv->rcb[ii];
 415                 if (!rcb)
 416                         continue;
 417
 418                 /* deallocate URBs */
 419                 if (rcb->urb) {
 420                         usb_kill_urb(rcb->urb);
 421                         usb_free_urb(rcb->urb);
 422                 }
 423
 424                 /* deallocate skb */
 425                 if (rcb->skb)
 426                         dev_kfree_skb(rcb->skb);
 427
 428                 kfree(rcb);
 429         }
 430 }
 431
 432 static void vnt_free_int_bufs(struct vnt_private *priv)
 433 {
 434         kfree(priv->int_buf.data_buf);
 435 }
 436
 437 static int vnt_alloc_bufs(struct vnt_private *priv)
 438 {
 439         int ret = 0;
 440         struct vnt_usb_send_context *tx_context;
 441         struct vnt_rcb *rcb;
 442         int ii;
 443
 444         for (ii = 0; ii < priv->num_tx_context; ii++) {
 445                 tx_context = kmalloc(sizeof(*tx_context), GFP_KERNEL);
 446                 if (!tx_context) {
 447                         ret = -ENOMEM;
 448                         goto free_tx;
 449                 }
 450
 451                 priv->tx_context[ii] = tx_context;
 452                 tx_context->priv = priv;
 453                 tx_context->pkt_no = ii;
 454
 455                 /* allocate URBs */
 456                 tx_context->urb = usb_alloc_urb(0, GFP_KERNEL);
 457                 if (!tx_context->urb) {
 458                         ret = -ENOMEM;
 459                         goto free_tx;
 460                 }
 461
 462                 tx_context->in_use = false;
 463         }
 464
 465         for (ii = 0; ii < priv->num_rcb; ii++) {
 466                 priv->rcb[ii] = kzalloc(sizeof(*priv->rcb[ii]), GFP_KERNEL);
 467                 if (!priv->rcb[ii]) {
 468                         ret = -ENOMEM;
 469                         goto free_rx_tx;
 470                 }
 471
 472                 rcb = priv->rcb[ii];
 473
 474                 rcb->priv = priv;
 475
 476                 /* allocate URBs */
 477                 rcb->urb = usb_alloc_urb(0, GFP_KERNEL);
 478                 if (!rcb->urb) {
 479                         ret = -ENOMEM;
 480                         goto free_rx_tx;
 481                 }
 482
 483                 rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
 484                 if (!rcb->skb) {
 485                         ret = -ENOMEM;
 486                         goto free_rx_tx;
 487                 }
 488
 489                 rcb->in_use = false;
 490
 491                 /* submit rx urb */
 492                 ret = vnt_submit_rx_urb(priv, rcb);
 493                 if (ret)
 494                         goto free_rx_tx;
 495         }
 496
 497         priv->interrupt_urb = usb_alloc_urb(0, GFP_KERNEL);
 498         if (!priv->interrupt_urb) {
 499                 ret = -ENOMEM;
 500                 goto free_rx_tx;
 501         }
 502
 503         priv->int_buf.data_buf = kmalloc(MAX_INTERRUPT_SIZE, GFP_KERNEL);
 504         if (!priv->int_buf.data_buf) {
 505                 ret = -ENOMEM;
 506                 goto free_rx_tx_urb;
 507         }
 508
 509         return 0;
 510
 511 free_rx_tx_urb:
 512         usb_free_urb(priv->interrupt_urb);
 513 free_rx_tx:
 514         vnt_free_rx_bufs(priv);
 515 free_tx:
 516         vnt_free_tx_bufs(priv);
 517         return ret;
 518 }
 519
 520 static void vnt_tx_80211(struct ieee80211_hw *hw,
 521                          struct ieee80211_tx_control *control,
 522                          struct sk_buff *skb)
 523 {
 524         struct vnt_private *priv = hw->priv;
 525
 526         if (vnt_tx_packet(priv, skb))
 527                 ieee80211_free_txskb(hw, skb);
 528 }
 529
 530 static int vnt_start(struct ieee80211_hw *hw)
 531 {
 532         int ret = 0;
 533         struct vnt_private *priv = hw->priv;
 534
 535         priv->rx_buf_sz = MAX_TOTAL_SIZE_WITH_ALL_HEADERS;
 536
 537         ret = vnt_alloc_bufs(priv);
 538         if (ret) {
 539                 dev_dbg(&priv->usb->dev, "vnt_alloc_bufs fail...\n");
 540                 goto err;
 541         }
 542
 543         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
 544
 545         ret = vnt_init_registers(priv);
 546         if (ret) {
 547                 dev_dbg(&priv->usb->dev, " init register fail\n");
 548                 goto free_all;
 549         }
 550
 551         ret = vnt_key_init_table(priv);
 552         if (ret)
 553                 goto free_all;
 554
 555         priv->int_interval = 1;  /* bInterval is set to 1 */
 556
 557         ret = vnt_int_start_interrupt(priv);
 558         if (ret)
 559                 goto free_all;
 560
 561         ieee80211_wake_queues(hw);
 562
 563         return 0;
 564
 565 free_all:
 566         vnt_free_rx_bufs(priv);
 567         vnt_free_tx_bufs(priv);
 568         vnt_free_int_bufs(priv);
 569
 570         usb_kill_urb(priv->interrupt_urb);
 571         usb_free_urb(priv->interrupt_urb);
 572 err:
 573         return ret;
 574 }
 575
 576 static void vnt_stop(struct ieee80211_hw *hw)
 577 {
 578         struct vnt_private *priv = hw->priv;
 579         int i;
 580
 581         if (!priv)
 582                 return;
 583
 584         for (i = 0; i < MAX_KEY_TABLE; i++)
 585                 vnt_mac_disable_keyentry(priv, i);
 586
 587         /* clear all keys */
 588         priv->key_entry_inuse = 0;
 589
 590         if (!test_bit(DEVICE_FLAGS_UNPLUG, &priv->flags))
 591                 vnt_mac_shutdown(priv);
 592
 593         ieee80211_stop_queues(hw);
 594
 595         set_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
 596
 597         cancel_delayed_work_sync(&priv->run_command_work);
 598
 599         priv->cmd_running = false;
 600
 601         vnt_free_tx_bufs(priv);
 602         vnt_free_rx_bufs(priv);
 603         vnt_free_int_bufs(priv);
 604
 605         usb_kill_urb(priv->interrupt_urb);
 606         usb_free_urb(priv->interrupt_urb);
 607 }
 608
 609 static int vnt_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 610 {
 611         struct vnt_private *priv = hw->priv;
 612
 613         priv->vif = vif;
 614
 615         switch (vif->type) {
 616         case NL80211_IFTYPE_STATION:
 617                 break;
 618         case NL80211_IFTYPE_ADHOC:
 619                 vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
 620
 621                 vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
 622
 623                 break;
 624         case NL80211_IFTYPE_AP:
 625                 vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
 626
 627                 vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_AP);
 628
 629                 break;
 630         default:
 631                 return -EOPNOTSUPP;
 632         }
 633
 634         priv->op_mode = vif->type;
 635
 636         /* LED blink on TX */
 637         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_INTER);
 638
 639         return 0;
 640 }
 641
 642 static void vnt_remove_interface(struct ieee80211_hw *hw,
 643                                  struct ieee80211_vif *vif)
 644 {
 645         struct vnt_private *priv = hw->priv;
 646
 647         switch (vif->type) {
 648         case NL80211_IFTYPE_STATION:
 649                 break;
 650         case NL80211_IFTYPE_ADHOC:
 651                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 652                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 653                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
 654                 break;
 655         case NL80211_IFTYPE_AP:
 656                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 657                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 658                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_AP);
 659                 break;
 660         default:
 661                 break;
 662         }
 663
 664         vnt_radio_power_off(priv);
 665
 666         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
 667
 668         /* LED slow blink */
 669         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_SLOW);
 670 }
 671
 672 static int vnt_config(struct ieee80211_hw *hw, u32 changed)
 673 {
 674         struct vnt_private *priv = hw->priv;
 675         struct ieee80211_conf *conf = &hw->conf;
 676
 677         if (changed & IEEE80211_CONF_CHANGE_PS) {
 678                 if (conf->flags & IEEE80211_CONF_PS)
 679                         vnt_enable_power_saving(priv, conf->listen_interval);
 680                 else
 681                         vnt_disable_power_saving(priv);
 682         }
 683
 684         if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) ||
 685             (conf->flags & IEEE80211_CONF_OFFCHANNEL)) {
 686                 vnt_set_channel(priv, conf->chandef.chan->hw_value);
 687
 688                 if (conf->chandef.chan->band == NL80211_BAND_5GHZ)
 689                         priv->bb_type = BB_TYPE_11A;
 690                 else
 691                         priv->bb_type = BB_TYPE_11G;
 692         }
 693
 694         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 695                 if (priv->bb_type == BB_TYPE_11B)
 696                         priv->current_rate = RATE_1M;
 697                 else
 698                         priv->current_rate = RATE_54M;
 699
 700                 vnt_rf_setpower(priv, priv->current_rate,
 701                                 conf->chandef.chan->hw_value);
 702         }
 703
 704         return 0;
 705 }
 706
 707 static void vnt_bss_info_changed(struct ieee80211_hw *hw,
 708                                  struct ieee80211_vif *vif,
 709                                  struct ieee80211_bss_conf *conf, u32 changed)
 710 {
 711         struct vnt_private *priv = hw->priv;
 712
 713         priv->current_aid = conf->aid;
 714
 715         if (changed & BSS_CHANGED_BSSID && conf->bssid)
 716                 vnt_mac_set_bssid_addr(priv, (u8 *)conf->bssid);
 717
 718         if (changed & BSS_CHANGED_BASIC_RATES) {
 719                 priv->basic_rates = conf->basic_rates;
 720
 721                 vnt_update_top_rates(priv);
 722
 723                 dev_dbg(&priv->usb->dev, "basic rates %x\n", conf->basic_rates);
 724         }
 725
 726         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
 727                 if (conf->use_short_preamble) {
 728                         vnt_mac_enable_barker_preamble_mode(priv);
 729                         priv->preamble_type = true;
 730                 } else {
 731                         vnt_mac_disable_barker_preamble_mode(priv);
 732                         priv->preamble_type = false;
 733                 }
 734         }
 735
 736         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
 737                 if (conf->use_cts_prot)
 738                         vnt_mac_enable_protect_mode(priv);
 739                 else
 740                         vnt_mac_disable_protect_mode(priv);
 741         }
 742
 743         if (changed & BSS_CHANGED_ERP_SLOT) {
 744                 if (conf->use_short_slot)
 745                         priv->short_slot_time = true;
 746                 else
 747                         priv->short_slot_time = false;
 748
 749                 vnt_set_short_slot_time(priv);
 750                 vnt_set_vga_gain_offset(priv, priv->bb_vga[0]);
 751                 vnt_update_pre_ed_threshold(priv, false);
 752         }
 753
 754         if (changed & (BSS_CHANGED_BASIC_RATES | BSS_CHANGED_ERP_PREAMBLE |
 755                        BSS_CHANGED_ERP_SLOT))
 756                 vnt_set_bss_mode(priv);
 757
 758         if (changed & BSS_CHANGED_TXPOWER)
 759                 vnt_rf_setpower(priv, priv->current_rate,
 760                                 conf->chandef.chan->hw_value);
 761
 762         if (changed & BSS_CHANGED_BEACON_ENABLED) {
 763                 dev_dbg(&priv->usb->dev,
 764                         "Beacon enable %d\n", conf->enable_beacon);
 765
 766                 if (conf->enable_beacon) {
 767                         vnt_beacon_enable(priv, vif, conf);
 768
 769                         vnt_mac_reg_bits_on(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 770                 } else {
 771                         vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 772                 }
 773         }
 774
 775         if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INFO) &&
 776             priv->op_mode != NL80211_IFTYPE_AP) {
 777                 if (conf->assoc && conf->beacon_rate) {
 778                         vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL,
 779                                             TFTCTL_TSFCNTREN);
 780
 781                         vnt_mac_set_beacon_interval(priv, conf->beacon_int);
 782
 783                         vnt_reset_next_tbtt(priv, conf->beacon_int);
 784
 785                         vnt_adjust_tsf(priv, conf->beacon_rate->hw_value,
 786                                        conf->sync_tsf, priv->current_tsf);
 787
 788                         vnt_update_next_tbtt(priv,
 789                                              conf->sync_tsf, conf->beacon_int);
 790                 } else {
 791                         vnt_clear_current_tsf(priv);
 792
 793                         vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL,
 794                                              TFTCTL_TSFCNTREN);
 795                 }
 796         }
 797 }
 798
 799 static u64 vnt_prepare_multicast(struct ieee80211_hw *hw,
 800                                  struct netdev_hw_addr_list *mc_list)
 801 {
 802         struct vnt_private *priv = hw->priv;
 803         struct netdev_hw_addr *ha;
 804         u64 mc_filter = 0;
 805         u32 bit_nr = 0;
 806
 807         netdev_hw_addr_list_for_each(ha, mc_list) {
 808                 bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
 809
 810                 mc_filter |= 1ULL << (bit_nr & 0x3f);
 811         }
 812
 813         priv->mc_list_count = mc_list->count;
 814
 815         return mc_filter;
 816 }
 817
 818 static void vnt_configure(struct ieee80211_hw *hw,
 819                           unsigned int changed_flags,
 820                           unsigned int *total_flags, u64 multicast)
 821 {
 822         struct vnt_private *priv = hw->priv;
 823         u8 rx_mode = 0;
 824
 825         *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC;
 826
 827         vnt_control_in(priv, MESSAGE_TYPE_READ, MAC_REG_RCR,
 828                        MESSAGE_REQUEST_MACREG, sizeof(u8), &rx_mode);
 829
 830         dev_dbg(&priv->usb->dev, "rx mode in = %x\n", rx_mode);
 831
 832         if (changed_flags & FIF_ALLMULTI) {
 833                 if (*total_flags & FIF_ALLMULTI) {
 834                         if (priv->mc_list_count > 2)
 835                                 vnt_mac_set_filter(priv, ~0);
 836                         else
 837                                 vnt_mac_set_filter(priv, multicast);
 838
 839                         rx_mode |= RCR_MULTICAST | RCR_BROADCAST;
 840                 } else {
 841                         rx_mode &= ~(RCR_MULTICAST | RCR_BROADCAST);
 842                 }
 843         }
 844
 845         if (changed_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC)) {
 846                 if (*total_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC))
 847                         rx_mode &= ~RCR_BSSID;
 848                 else
 849                         rx_mode |= RCR_BSSID;
 850         }
 851
 852         vnt_control_out_u8(priv, MESSAGE_REQUEST_MACREG, MAC_REG_RCR, rx_mode);
 853
 854         dev_dbg(&priv->usb->dev, "rx mode out= %x\n", rx_mode);
 855 }
 856
 857 static int vnt_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 858                        struct ieee80211_vif *vif, struct ieee80211_sta *sta,
 859                        struct ieee80211_key_conf *key)
 860 {
 861         struct vnt_private *priv = hw->priv;
 862
 863         switch (cmd) {
 864         case SET_KEY:
 865                 if (vnt_set_keys(hw, sta, vif, key))
 866                         return -EOPNOTSUPP;
 867                 break;
 868         case DISABLE_KEY:
 869                 if (test_bit(key->hw_key_idx, &priv->key_entry_inuse))
 870                         clear_bit(key->hw_key_idx, &priv->key_entry_inuse);
 871         default:
 872                 break;
 873         }
 874
 875         return 0;
 876 }
 877
 878 static void vnt_sw_scan_start(struct ieee80211_hw *hw,
 879                               struct ieee80211_vif *vif,
 880                               const u8 *addr)
 881 {
 882         struct vnt_private *priv = hw->priv;
 883
 884         /* Set max sensitivity*/
 885         vnt_update_pre_ed_threshold(priv, true);
 886 }
 887
 888 static void vnt_sw_scan_complete(struct ieee80211_hw *hw,
 889                                  struct ieee80211_vif *vif)
 890 {
 891         struct vnt_private *priv = hw->priv;
 892
 893         /* Return sensitivity to channel level*/
 894         vnt_update_pre_ed_threshold(priv, false);
 895 }
 896
 897 static int vnt_get_stats(struct ieee80211_hw *hw,
 898                          struct ieee80211_low_level_stats *stats)
 899 {
 900         struct vnt_private *priv = hw->priv;
 901
 902         memcpy(stats, &priv->low_stats, sizeof(*stats));
 903
 904         return 0;
 905 }
 906
 907 static u64 vnt_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 908 {
 909         struct vnt_private *priv = hw->priv;
 910
 911         return priv->current_tsf;
 912 }
 913
 914 static void vnt_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 915                         u64 tsf)
 916 {
 917         struct vnt_private *priv = hw->priv;
 918
 919         vnt_update_next_tbtt(priv, tsf, vif->bss_conf.beacon_int);
 920 }
 921
 922 static void vnt_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 923 {
 924         struct vnt_private *priv = hw->priv;
 925
 926         vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 927
 928         vnt_clear_current_tsf(priv);
 929 }
 930
 931 static const struct ieee80211_ops vnt_mac_ops = {
 932         .tx                     = vnt_tx_80211,
 933         .start                  = vnt_start,
 934         .stop                   = vnt_stop,
 935         .add_interface          = vnt_add_interface,
 936         .remove_interface       = vnt_remove_interface,
 937         .config                 = vnt_config,
 938         .bss_info_changed       = vnt_bss_info_changed,
 939         .prepare_multicast      = vnt_prepare_multicast,
 940         .configure_filter       = vnt_configure,
 941         .set_key                = vnt_set_key,
 942         .sw_scan_start          = vnt_sw_scan_start,
 943         .sw_scan_complete       = vnt_sw_scan_complete,
 944         .get_stats              = vnt_get_stats,
 945         .get_tsf                = vnt_get_tsf,
 946         .set_tsf                = vnt_set_tsf,
 947         .reset_tsf              = vnt_reset_tsf,
 948 };
 949
 950 int vnt_init(struct vnt_private *priv)
 951 {
 952         if (vnt_init_registers(priv))
 953                 return -EAGAIN;
 954
 955         SET_IEEE80211_PERM_ADDR(priv->hw, priv->permanent_net_addr);
 956
 957         vnt_init_bands(priv);
 958
 959         if (ieee80211_register_hw(priv->hw))
 960                 return -ENODEV;
 961
 962         priv->mac_hw = true;
 963
 964         vnt_radio_power_off(priv);
 965
 966         return 0;
 967 }
 968
 969 static int
 970 vt6656_probe(struct usb_interface *intf, const struct usb_device_id *id)
 971 {
 972         struct usb_device *udev;
 973         struct vnt_private *priv;
 974         struct ieee80211_hw *hw;
 975         struct wiphy *wiphy;
 976         int rc = 0;
 977
 978         udev = usb_get_dev(interface_to_usbdev(intf));
 979
 980         dev_notice(&udev->dev, "%s Ver. %s\n",
 981                    DEVICE_FULL_DRV_NAM, DEVICE_VERSION);
 982         dev_notice(&udev->dev,
 983                    "Copyright (c) 2004 VIA Networking Technologies, Inc.\n");
 984
 985         hw = ieee80211_alloc_hw(sizeof(struct vnt_private), &vnt_mac_ops);
 986         if (!hw) {
 987                 dev_err(&udev->dev, "could not register ieee80211_hw\n");
 988                 rc = -ENOMEM;
 989                 goto err_nomem;
 990         }
 991
 992         priv = hw->priv;
 993         priv->hw = hw;
 994         priv->usb = udev;
 995         priv->intf = intf;
 996
 997         vnt_set_options(priv);
 998
 999         spin_lock_init(&priv->lock);
1000         mutex_init(&priv->usb_lock);
1001
1002         INIT_DELAYED_WORK(&priv->run_command_work, vnt_run_command);
1003
1004         usb_set_intfdata(intf, priv);
1005
1006         wiphy = priv->hw->wiphy;
1007
1008         wiphy->frag_threshold = FRAG_THRESH_DEF;
1009         wiphy->rts_threshold = RTS_THRESH_DEF;
1010         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1011                 BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP);
1012
1013         ieee80211_hw_set(priv->hw, TIMING_BEACON_ONLY);
1014         ieee80211_hw_set(priv->hw, SIGNAL_DBM);
1015         ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1016         ieee80211_hw_set(priv->hw, REPORTS_TX_ACK_STATUS);
1017         ieee80211_hw_set(priv->hw, SUPPORTS_PS);
1018         ieee80211_hw_set(priv->hw, PS_NULLFUNC_STACK);
1019
1020         priv->hw->max_signal = 100;
1021
1022         SET_IEEE80211_DEV(priv->hw, &intf->dev);
1023
1024         rc = usb_reset_device(priv->usb);
1025         if (rc)
1026                 dev_warn(&priv->usb->dev,
1027                          "%s reset fail status=%d\n", __func__, rc);
1028
1029         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
1030         vnt_reset_command_timer(priv);
1031
1032         vnt_schedule_command(priv, WLAN_CMD_INIT_MAC80211);
1033
1034         return 0;
1035
1036 err_nomem:
1037         usb_put_dev(udev);
1038
1039         return rc;
1040 }
1041
1042 static void vt6656_disconnect(struct usb_interface *intf)
1043 {
1044         struct vnt_private *priv = usb_get_intfdata(intf);
1045
1046         if (!priv)
1047                 return;
1048
1049         if (priv->mac_hw)
1050                 ieee80211_unregister_hw(priv->hw);
1051
1052         usb_set_intfdata(intf, NULL);
1053         usb_put_dev(interface_to_usbdev(intf));
1054
1055         set_bit(DEVICE_FLAGS_UNPLUG, &priv->flags);
1056
1057         ieee80211_free_hw(priv->hw);
1058 }
1059
1060 #ifdef CONFIG_PM
1061
1062 static int vt6656_suspend(struct usb_interface *intf, pm_message_t message)
1063 {
1064         return 0;
1065 }
1066
1067 static int vt6656_resume(struct usb_interface *intf)
1068 {
1069         return 0;
1070 }
1071
1072 #endif /* CONFIG_PM */
1073
1074 MODULE_DEVICE_TABLE(usb, vt6656_table);
1075
1076 static struct usb_driver vt6656_driver = {
1077         .name =         DEVICE_NAME,
1078         .probe =        vt6656_probe,
1079         .disconnect =   vt6656_disconnect,
1080         .id_table =     vt6656_table,
1081 #ifdef CONFIG_PM
1082         .suspend = vt6656_suspend,
1083         .resume = vt6656_resume,
1084 #endif /* CONFIG_PM */
1085 };
1086
1087 module_usb_driver(vt6656_driver);