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         vnt_set_bss_mode(priv);
 637
 638         /* LED blink on TX */
 639         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_INTER);
 640
 641         return 0;
 642 }
 643
 644 static void vnt_remove_interface(struct ieee80211_hw *hw,
 645                                  struct ieee80211_vif *vif)
 646 {
 647         struct vnt_private *priv = hw->priv;
 648
 649         switch (vif->type) {
 650         case NL80211_IFTYPE_STATION:
 651                 break;
 652         case NL80211_IFTYPE_ADHOC:
 653                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 654                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 655                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
 656                 break;
 657         case NL80211_IFTYPE_AP:
 658                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 659                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 660                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_AP);
 661                 break;
 662         default:
 663                 break;
 664         }
 665
 666         vnt_radio_power_off(priv);
 667
 668         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
 669
 670         /* LED slow blink */
 671         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_SLOW);
 672 }
 673
 674 static int vnt_config(struct ieee80211_hw *hw, u32 changed)
 675 {
 676         struct vnt_private *priv = hw->priv;
 677         struct ieee80211_conf *conf = &hw->conf;
 678
 679         if (changed & IEEE80211_CONF_CHANGE_PS) {
 680                 if (conf->flags & IEEE80211_CONF_PS)
 681                         vnt_enable_power_saving(priv, conf->listen_interval);
 682                 else
 683                         vnt_disable_power_saving(priv);
 684         }
 685
 686         if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) ||
 687             (conf->flags & IEEE80211_CONF_OFFCHANNEL)) {
 688                 vnt_set_channel(priv, conf->chandef.chan->hw_value);
 689
 690                 if (conf->chandef.chan->band == NL80211_BAND_5GHZ)
 691                         priv->bb_type = BB_TYPE_11A;
 692                 else
 693                         priv->bb_type = BB_TYPE_11G;
 694         }
 695
 696         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 697                 if (priv->bb_type == BB_TYPE_11B)
 698                         priv->current_rate = RATE_1M;
 699                 else
 700                         priv->current_rate = RATE_54M;
 701
 702                 vnt_rf_setpower(priv, priv->current_rate,
 703                                 conf->chandef.chan->hw_value);
 704         }
 705
 706         return 0;
 707 }
 708
 709 static void vnt_bss_info_changed(struct ieee80211_hw *hw,
 710                                  struct ieee80211_vif *vif,
 711                                  struct ieee80211_bss_conf *conf, u32 changed)
 712 {
 713         struct vnt_private *priv = hw->priv;
 714
 715         priv->current_aid = conf->aid;
 716
 717         if (changed & BSS_CHANGED_BSSID && conf->bssid)
 718                 vnt_mac_set_bssid_addr(priv, (u8 *)conf->bssid);
 719
 720         if (changed & BSS_CHANGED_BASIC_RATES) {
 721                 priv->basic_rates = conf->basic_rates;
 722
 723                 vnt_update_top_rates(priv);
 724                 vnt_set_bss_mode(priv);
 725
 726                 dev_dbg(&priv->usb->dev, "basic rates %x\n", conf->basic_rates);
 727         }
 728
 729         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
 730                 if (conf->use_short_preamble) {
 731                         vnt_mac_enable_barker_preamble_mode(priv);
 732                         priv->preamble_type = true;
 733                 } else {
 734                         vnt_mac_disable_barker_preamble_mode(priv);
 735                         priv->preamble_type = false;
 736                 }
 737         }
 738
 739         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
 740                 if (conf->use_cts_prot)
 741                         vnt_mac_enable_protect_mode(priv);
 742                 else
 743                         vnt_mac_disable_protect_mode(priv);
 744         }
 745
 746         if (changed & BSS_CHANGED_ERP_SLOT) {
 747                 if (conf->use_short_slot)
 748                         priv->short_slot_time = true;
 749                 else
 750                         priv->short_slot_time = false;
 751
 752                 vnt_set_short_slot_time(priv);
 753                 vnt_update_ifs(priv);
 754                 vnt_set_vga_gain_offset(priv, priv->bb_vga[0]);
 755                 vnt_update_pre_ed_threshold(priv, false);
 756         }
 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_adjust_tsf(priv, conf->beacon_rate->hw_value,
 782                                        conf->sync_tsf, priv->current_tsf);
 783
 784                         vnt_mac_set_beacon_interval(priv, conf->beacon_int);
 785
 786                         vnt_reset_next_tbtt(priv, conf->beacon_int);
 787                 } else {
 788                         vnt_clear_current_tsf(priv);
 789
 790                         vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL,
 791                                              TFTCTL_TSFCNTREN);
 792                 }
 793         }
 794 }
 795
 796 static u64 vnt_prepare_multicast(struct ieee80211_hw *hw,
 797                                  struct netdev_hw_addr_list *mc_list)
 798 {
 799         struct vnt_private *priv = hw->priv;
 800         struct netdev_hw_addr *ha;
 801         u64 mc_filter = 0;
 802         u32 bit_nr = 0;
 803
 804         netdev_hw_addr_list_for_each(ha, mc_list) {
 805                 bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
 806
 807                 mc_filter |= 1ULL << (bit_nr & 0x3f);
 808         }
 809
 810         priv->mc_list_count = mc_list->count;
 811
 812         return mc_filter;
 813 }
 814
 815 static void vnt_configure(struct ieee80211_hw *hw,
 816                           unsigned int changed_flags,
 817                           unsigned int *total_flags, u64 multicast)
 818 {
 819         struct vnt_private *priv = hw->priv;
 820         u8 rx_mode = 0;
 821         int rc;
 822
 823         *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC;
 824
 825         rc = vnt_control_in(priv, MESSAGE_TYPE_READ, MAC_REG_RCR,
 826                             MESSAGE_REQUEST_MACREG, sizeof(u8), &rx_mode);
 827
 828         if (!rc)
 829                 rx_mode = RCR_MULTICAST | RCR_BROADCAST;
 830
 831         dev_dbg(&priv->usb->dev, "rx mode in = %x\n", rx_mode);
 832
 833         if (changed_flags & FIF_ALLMULTI) {
 834                 if (*total_flags & FIF_ALLMULTI) {
 835                         if (priv->mc_list_count > 2)
 836                                 vnt_mac_set_filter(priv, ~0);
 837                         else
 838                                 vnt_mac_set_filter(priv, multicast);
 839
 840                         rx_mode |= RCR_MULTICAST | RCR_BROADCAST;
 841                 } else {
 842                         rx_mode &= ~(RCR_MULTICAST | RCR_BROADCAST);
 843                 }
 844         }
 845
 846         if (changed_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC)) {
 847                 if (*total_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC))
 848                         rx_mode &= ~RCR_BSSID;
 849                 else
 850                         rx_mode |= RCR_BSSID;
 851         }
 852
 853         vnt_control_out_u8(priv, MESSAGE_REQUEST_MACREG, MAC_REG_RCR, rx_mode);
 854
 855         dev_dbg(&priv->usb->dev, "rx mode out= %x\n", rx_mode);
 856 }
 857
 858 static int vnt_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 859                        struct ieee80211_vif *vif, struct ieee80211_sta *sta,
 860                        struct ieee80211_key_conf *key)
 861 {
 862         struct vnt_private *priv = hw->priv;
 863
 864         switch (cmd) {
 865         case SET_KEY:
 866                 if (vnt_set_keys(hw, sta, vif, key))
 867                         return -EOPNOTSUPP;
 868                 break;
 869         case DISABLE_KEY:
 870                 if (test_bit(key->hw_key_idx, &priv->key_entry_inuse))
 871                         clear_bit(key->hw_key_idx, &priv->key_entry_inuse);
 872         default:
 873                 break;
 874         }
 875
 876         return 0;
 877 }
 878
 879 static void vnt_sw_scan_start(struct ieee80211_hw *hw,
 880                               struct ieee80211_vif *vif,
 881                               const u8 *addr)
 882 {
 883         struct vnt_private *priv = hw->priv;
 884
 885         /* Set max sensitivity*/
 886         vnt_update_pre_ed_threshold(priv, true);
 887 }
 888
 889 static void vnt_sw_scan_complete(struct ieee80211_hw *hw,
 890                                  struct ieee80211_vif *vif)
 891 {
 892         struct vnt_private *priv = hw->priv;
 893
 894         /* Return sensitivity to channel level*/
 895         vnt_update_pre_ed_threshold(priv, false);
 896 }
 897
 898 static int vnt_get_stats(struct ieee80211_hw *hw,
 899                          struct ieee80211_low_level_stats *stats)
 900 {
 901         struct vnt_private *priv = hw->priv;
 902
 903         memcpy(stats, &priv->low_stats, sizeof(*stats));
 904
 905         return 0;
 906 }
 907
 908 static u64 vnt_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 909 {
 910         struct vnt_private *priv = hw->priv;
 911
 912         return priv->current_tsf;
 913 }
 914
 915 static void vnt_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 916                         u64 tsf)
 917 {
 918         struct vnt_private *priv = hw->priv;
 919
 920         vnt_update_next_tbtt(priv, tsf, vif->bss_conf.beacon_int);
 921 }
 922
 923 static void vnt_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 924 {
 925         struct vnt_private *priv = hw->priv;
 926
 927         vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 928
 929         vnt_clear_current_tsf(priv);
 930 }
 931
 932 static const struct ieee80211_ops vnt_mac_ops = {
 933         .tx                     = vnt_tx_80211,
 934         .start                  = vnt_start,
 935         .stop                   = vnt_stop,
 936         .add_interface          = vnt_add_interface,
 937         .remove_interface       = vnt_remove_interface,
 938         .config                 = vnt_config,
 939         .bss_info_changed       = vnt_bss_info_changed,
 940         .prepare_multicast      = vnt_prepare_multicast,
 941         .configure_filter       = vnt_configure,
 942         .set_key                = vnt_set_key,
 943         .sw_scan_start          = vnt_sw_scan_start,
 944         .sw_scan_complete       = vnt_sw_scan_complete,
 945         .get_stats              = vnt_get_stats,
 946         .get_tsf                = vnt_get_tsf,
 947         .set_tsf                = vnt_set_tsf,
 948         .reset_tsf              = vnt_reset_tsf,
 949 };
 950
 951 int vnt_init(struct vnt_private *priv)
 952 {
 953         if (!(vnt_init_registers(priv)))
 954                 return -EAGAIN;
 955
 956         SET_IEEE80211_PERM_ADDR(priv->hw, priv->permanent_net_addr);
 957
 958         vnt_init_bands(priv);
 959
 960         if (ieee80211_register_hw(priv->hw))
 961                 return -ENODEV;
 962
 963         priv->mac_hw = true;
 964
 965         vnt_radio_power_off(priv);
 966
 967         return 0;
 968 }
 969
 970 static int
 971 vt6656_probe(struct usb_interface *intf, const struct usb_device_id *id)
 972 {
 973         struct usb_device *udev;
 974         struct vnt_private *priv;
 975         struct ieee80211_hw *hw;
 976         struct wiphy *wiphy;
 977         int rc = 0;
 978
 979         udev = usb_get_dev(interface_to_usbdev(intf));
 980
 981         dev_notice(&udev->dev, "%s Ver. %s\n",
 982                    DEVICE_FULL_DRV_NAM, DEVICE_VERSION);
 983         dev_notice(&udev->dev,
 984                    "Copyright (c) 2004 VIA Networking Technologies, Inc.\n");
 985
 986         hw = ieee80211_alloc_hw(sizeof(struct vnt_private), &vnt_mac_ops);
 987         if (!hw) {
 988                 dev_err(&udev->dev, "could not register ieee80211_hw\n");
 989                 rc = -ENOMEM;
 990                 goto err_nomem;
 991         }
 992
 993         priv = hw->priv;
 994         priv->hw = hw;
 995         priv->usb = udev;
 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
1019         priv->hw->max_signal = 100;
1020
1021         SET_IEEE80211_DEV(priv->hw, &intf->dev);
1022
1023         rc = usb_reset_device(priv->usb);
1024         if (rc)
1025                 dev_warn(&priv->usb->dev,
1026                          "%s reset fail status=%d\n", __func__, rc);
1027
1028         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
1029         vnt_reset_command_timer(priv);
1030
1031         vnt_schedule_command(priv, WLAN_CMD_INIT_MAC80211);
1032
1033         return 0;
1034
1035 err_nomem:
1036         usb_put_dev(udev);
1037
1038         return rc;
1039 }
1040
1041 static void vt6656_disconnect(struct usb_interface *intf)
1042 {
1043         struct vnt_private *priv = usb_get_intfdata(intf);
1044
1045         if (!priv)
1046                 return;
1047
1048         if (priv->mac_hw)
1049                 ieee80211_unregister_hw(priv->hw);
1050
1051         usb_set_intfdata(intf, NULL);
1052         usb_put_dev(interface_to_usbdev(intf));
1053
1054         set_bit(DEVICE_FLAGS_UNPLUG, &priv->flags);
1055
1056         ieee80211_free_hw(priv->hw);
1057 }
1058
1059 #ifdef CONFIG_PM
1060
1061 static int vt6656_suspend(struct usb_interface *intf, pm_message_t message)
1062 {
1063         return 0;
1064 }
1065
1066 static int vt6656_resume(struct usb_interface *intf)
1067 {
1068         return 0;
1069 }
1070
1071 #endif /* CONFIG_PM */
1072
1073 MODULE_DEVICE_TABLE(usb, vt6656_table);
1074
1075 static struct usb_driver vt6656_driver = {
1076         .name =         DEVICE_NAME,
1077         .probe =        vt6656_probe,
1078         .disconnect =   vt6656_disconnect,
1079         .id_table =     vt6656_table,
1080 #ifdef CONFIG_PM
1081         .suspend = vt6656_suspend,
1082         .resume = vt6656_resume,
1083 #endif /* CONFIG_PM */
1084 };
1085
1086 module_usb_driver(vt6656_driver);