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