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         ret = vnt_mac_set_led(priv, LEDSTS_TMLEN, 0x38);
 366         if (ret)
 367                 goto end;
 368
 369         ret = vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_SLOW);
 370         if (ret)
 371                 goto end;
 372
 373         ret = vnt_mac_reg_bits_on(priv, MAC_REG_GPIOCTL0, 0x01);
 374         if (ret)
 375                 goto end;
 376
 377         ret = vnt_radio_power_on(priv);
 378         if (ret)
 379                 goto end;
 380
 381         dev_dbg(&priv->usb->dev, "<----INIbInitAdapter Exit\n");
 382
 383 end:
 384         return ret;
 385 }
 386
 387 static void vnt_free_tx_bufs(struct vnt_private *priv)
 388 {
 389         struct vnt_usb_send_context *tx_context;
 390         int ii;
 391
 392         for (ii = 0; ii < priv->num_tx_context; ii++) {
 393                 tx_context = priv->tx_context[ii];
 394                 if (!tx_context)
 395                         continue;
 396
 397                 /* deallocate URBs */
 398                 if (tx_context->urb) {
 399                         usb_kill_urb(tx_context->urb);
 400                         usb_free_urb(tx_context->urb);
 401                 }
 402
 403                 kfree(tx_context);
 404         }
 405 }
 406
 407 static void vnt_free_rx_bufs(struct vnt_private *priv)
 408 {
 409         struct vnt_rcb *rcb;
 410         int ii;
 411
 412         for (ii = 0; ii < priv->num_rcb; ii++) {
 413                 rcb = priv->rcb[ii];
 414                 if (!rcb)
 415                         continue;
 416
 417                 /* deallocate URBs */
 418                 if (rcb->urb) {
 419                         usb_kill_urb(rcb->urb);
 420                         usb_free_urb(rcb->urb);
 421                 }
 422
 423                 /* deallocate skb */
 424                 if (rcb->skb)
 425                         dev_kfree_skb(rcb->skb);
 426
 427                 kfree(rcb);
 428         }
 429 }
 430
 431 static void vnt_free_int_bufs(struct vnt_private *priv)
 432 {
 433         kfree(priv->int_buf.data_buf);
 434 }
 435
 436 static int vnt_alloc_bufs(struct vnt_private *priv)
 437 {
 438         int ret = 0;
 439         struct vnt_usb_send_context *tx_context;
 440         struct vnt_rcb *rcb;
 441         int ii;
 442
 443         for (ii = 0; ii < priv->num_tx_context; ii++) {
 444                 tx_context = kmalloc(sizeof(*tx_context), GFP_KERNEL);
 445                 if (!tx_context) {
 446                         ret = -ENOMEM;
 447                         goto free_tx;
 448                 }
 449
 450                 priv->tx_context[ii] = tx_context;
 451                 tx_context->priv = priv;
 452                 tx_context->pkt_no = ii;
 453
 454                 /* allocate URBs */
 455                 tx_context->urb = usb_alloc_urb(0, GFP_KERNEL);
 456                 if (!tx_context->urb) {
 457                         ret = -ENOMEM;
 458                         goto free_tx;
 459                 }
 460
 461                 tx_context->in_use = false;
 462         }
 463
 464         for (ii = 0; ii < priv->num_rcb; ii++) {
 465                 priv->rcb[ii] = kzalloc(sizeof(*priv->rcb[ii]), GFP_KERNEL);
 466                 if (!priv->rcb[ii]) {
 467                         ret = -ENOMEM;
 468                         goto free_rx_tx;
 469                 }
 470
 471                 rcb = priv->rcb[ii];
 472
 473                 rcb->priv = priv;
 474
 475                 /* allocate URBs */
 476                 rcb->urb = usb_alloc_urb(0, GFP_KERNEL);
 477                 if (!rcb->urb) {
 478                         ret = -ENOMEM;
 479                         goto free_rx_tx;
 480                 }
 481
 482                 rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
 483                 if (!rcb->skb) {
 484                         ret = -ENOMEM;
 485                         goto free_rx_tx;
 486                 }
 487
 488                 rcb->in_use = false;
 489
 490                 /* submit rx urb */
 491                 ret = vnt_submit_rx_urb(priv, rcb);
 492                 if (ret)
 493                         goto free_rx_tx;
 494         }
 495
 496         priv->interrupt_urb = usb_alloc_urb(0, GFP_KERNEL);
 497         if (!priv->interrupt_urb) {
 498                 ret = -ENOMEM;
 499                 goto free_rx_tx;
 500         }
 501
 502         priv->int_buf.data_buf = kmalloc(MAX_INTERRUPT_SIZE, GFP_KERNEL);
 503         if (!priv->int_buf.data_buf) {
 504                 ret = -ENOMEM;
 505                 goto free_rx_tx_urb;
 506         }
 507
 508         return 0;
 509
 510 free_rx_tx_urb:
 511         usb_free_urb(priv->interrupt_urb);
 512 free_rx_tx:
 513         vnt_free_rx_bufs(priv);
 514 free_tx:
 515         vnt_free_tx_bufs(priv);
 516         return ret;
 517 }
 518
 519 static void vnt_tx_80211(struct ieee80211_hw *hw,
 520                          struct ieee80211_tx_control *control,
 521                          struct sk_buff *skb)
 522 {
 523         struct vnt_private *priv = hw->priv;
 524
 525         if (vnt_tx_packet(priv, skb))
 526                 ieee80211_free_txskb(hw, skb);
 527 }
 528
 529 static int vnt_start(struct ieee80211_hw *hw)
 530 {
 531         int ret = 0;
 532         struct vnt_private *priv = hw->priv;
 533
 534         priv->rx_buf_sz = MAX_TOTAL_SIZE_WITH_ALL_HEADERS;
 535
 536         ret = vnt_alloc_bufs(priv);
 537         if (ret) {
 538                 dev_dbg(&priv->usb->dev, "vnt_alloc_bufs fail...\n");
 539                 goto err;
 540         }
 541
 542         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
 543
 544         ret = vnt_init_registers(priv);
 545         if (ret) {
 546                 dev_dbg(&priv->usb->dev, " init register fail\n");
 547                 goto free_all;
 548         }
 549
 550         ret = vnt_key_init_table(priv);
 551         if (ret)
 552                 goto free_all;
 553
 554         priv->int_interval = 1;  /* bInterval is set to 1 */
 555
 556         ret = vnt_int_start_interrupt(priv);
 557         if (ret)
 558                 goto free_all;
 559
 560         ieee80211_wake_queues(hw);
 561
 562         return 0;
 563
 564 free_all:
 565         vnt_free_rx_bufs(priv);
 566         vnt_free_tx_bufs(priv);
 567         vnt_free_int_bufs(priv);
 568
 569         usb_kill_urb(priv->interrupt_urb);
 570         usb_free_urb(priv->interrupt_urb);
 571 err:
 572         return ret;
 573 }
 574
 575 static void vnt_stop(struct ieee80211_hw *hw)
 576 {
 577         struct vnt_private *priv = hw->priv;
 578         int i;
 579
 580         if (!priv)
 581                 return;
 582
 583         for (i = 0; i < MAX_KEY_TABLE; i++)
 584                 vnt_mac_disable_keyentry(priv, i);
 585
 586         /* clear all keys */
 587         priv->key_entry_inuse = 0;
 588
 589         if (!test_bit(DEVICE_FLAGS_UNPLUG, &priv->flags))
 590                 vnt_mac_shutdown(priv);
 591
 592         ieee80211_stop_queues(hw);
 593
 594         set_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
 595
 596         cancel_delayed_work_sync(&priv->run_command_work);
 597
 598         priv->cmd_running = false;
 599
 600         vnt_free_tx_bufs(priv);
 601         vnt_free_rx_bufs(priv);
 602         vnt_free_int_bufs(priv);
 603
 604         usb_kill_urb(priv->interrupt_urb);
 605         usb_free_urb(priv->interrupt_urb);
 606 }
 607
 608 static int vnt_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 609 {
 610         struct vnt_private *priv = hw->priv;
 611
 612         priv->vif = vif;
 613
 614         switch (vif->type) {
 615         case NL80211_IFTYPE_STATION:
 616                 break;
 617         case NL80211_IFTYPE_ADHOC:
 618                 vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
 619
 620                 vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
 621
 622                 break;
 623         case NL80211_IFTYPE_AP:
 624                 vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
 625
 626                 vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_AP);
 627
 628                 break;
 629         default:
 630                 return -EOPNOTSUPP;
 631         }
 632
 633         priv->op_mode = vif->type;
 634
 635         vnt_set_bss_mode(priv);
 636
 637         /* LED blink on TX */
 638         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_INTER);
 639
 640         return 0;
 641 }
 642
 643 static void vnt_remove_interface(struct ieee80211_hw *hw,
 644                                  struct ieee80211_vif *vif)
 645 {
 646         struct vnt_private *priv = hw->priv;
 647
 648         switch (vif->type) {
 649         case NL80211_IFTYPE_STATION:
 650                 break;
 651         case NL80211_IFTYPE_ADHOC:
 652                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 653                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 654                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
 655                 break;
 656         case NL80211_IFTYPE_AP:
 657                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 658                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 659                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_AP);
 660                 break;
 661         default:
 662                 break;
 663         }
 664
 665         vnt_radio_power_off(priv);
 666
 667         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
 668
 669         /* LED slow blink */
 670         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_SLOW);
 671 }
 672
 673 static int vnt_config(struct ieee80211_hw *hw, u32 changed)
 674 {
 675         struct vnt_private *priv = hw->priv;
 676         struct ieee80211_conf *conf = &hw->conf;
 677
 678         if (changed & IEEE80211_CONF_CHANGE_PS) {
 679                 if (conf->flags & IEEE80211_CONF_PS)
 680                         vnt_enable_power_saving(priv, conf->listen_interval);
 681                 else
 682                         vnt_disable_power_saving(priv);
 683         }
 684
 685         if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) ||
 686             (conf->flags & IEEE80211_CONF_OFFCHANNEL)) {
 687                 vnt_set_channel(priv, conf->chandef.chan->hw_value);
 688
 689                 if (conf->chandef.chan->band == NL80211_BAND_5GHZ)
 690                         priv->bb_type = BB_TYPE_11A;
 691                 else
 692                         priv->bb_type = BB_TYPE_11G;
 693         }
 694
 695         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 696                 if (priv->bb_type == BB_TYPE_11B)
 697                         priv->current_rate = RATE_1M;
 698                 else
 699                         priv->current_rate = RATE_54M;
 700
 701                 vnt_rf_setpower(priv, priv->current_rate,
 702                                 conf->chandef.chan->hw_value);
 703         }
 704
 705         return 0;
 706 }
 707
 708 static void vnt_bss_info_changed(struct ieee80211_hw *hw,
 709                                  struct ieee80211_vif *vif,
 710                                  struct ieee80211_bss_conf *conf, u32 changed)
 711 {
 712         struct vnt_private *priv = hw->priv;
 713
 714         priv->current_aid = conf->aid;
 715
 716         if (changed & BSS_CHANGED_BSSID && conf->bssid)
 717                 vnt_mac_set_bssid_addr(priv, (u8 *)conf->bssid);
 718
 719         if (changed & BSS_CHANGED_BASIC_RATES) {
 720                 priv->basic_rates = conf->basic_rates;
 721
 722                 vnt_update_top_rates(priv);
 723                 vnt_set_bss_mode(priv);
 724
 725                 dev_dbg(&priv->usb->dev, "basic rates %x\n", conf->basic_rates);
 726         }
 727
 728         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
 729                 if (conf->use_short_preamble) {
 730                         vnt_mac_enable_barker_preamble_mode(priv);
 731                         priv->preamble_type = true;
 732                 } else {
 733                         vnt_mac_disable_barker_preamble_mode(priv);
 734                         priv->preamble_type = false;
 735                 }
 736         }
 737
 738         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
 739                 if (conf->use_cts_prot)
 740                         vnt_mac_enable_protect_mode(priv);
 741                 else
 742                         vnt_mac_disable_protect_mode(priv);
 743         }
 744
 745         if (changed & BSS_CHANGED_ERP_SLOT) {
 746                 if (conf->use_short_slot)
 747                         priv->short_slot_time = true;
 748                 else
 749                         priv->short_slot_time = false;
 750
 751                 vnt_set_short_slot_time(priv);
 752                 vnt_update_ifs(priv);
 753                 vnt_set_vga_gain_offset(priv, priv->bb_vga[0]);
 754                 vnt_update_pre_ed_threshold(priv, false);
 755         }
 756
 757         if (changed & BSS_CHANGED_TXPOWER)
 758                 vnt_rf_setpower(priv, priv->current_rate,
 759                                 conf->chandef.chan->hw_value);
 760
 761         if (changed & BSS_CHANGED_BEACON_ENABLED) {
 762                 dev_dbg(&priv->usb->dev,
 763                         "Beacon enable %d\n", conf->enable_beacon);
 764
 765                 if (conf->enable_beacon) {
 766                         vnt_beacon_enable(priv, vif, conf);
 767
 768                         vnt_mac_reg_bits_on(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 769                 } else {
 770                         vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 771                 }
 772         }
 773
 774         if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INFO) &&
 775             priv->op_mode != NL80211_IFTYPE_AP) {
 776                 if (conf->assoc && conf->beacon_rate) {
 777                         vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL,
 778                                             TFTCTL_TSFCNTREN);
 779
 780                         vnt_adjust_tsf(priv, conf->beacon_rate->hw_value,
 781                                        conf->sync_tsf, priv->current_tsf);
 782
 783                         vnt_mac_set_beacon_interval(priv, conf->beacon_int);
 784
 785                         vnt_reset_next_tbtt(priv, conf->beacon_int);
 786                 } else {
 787                         vnt_clear_current_tsf(priv);
 788
 789                         vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL,
 790                                              TFTCTL_TSFCNTREN);
 791                 }
 792         }
 793 }
 794
 795 static u64 vnt_prepare_multicast(struct ieee80211_hw *hw,
 796                                  struct netdev_hw_addr_list *mc_list)
 797 {
 798         struct vnt_private *priv = hw->priv;
 799         struct netdev_hw_addr *ha;
 800         u64 mc_filter = 0;
 801         u32 bit_nr = 0;
 802
 803         netdev_hw_addr_list_for_each(ha, mc_list) {
 804                 bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
 805
 806                 mc_filter |= 1ULL << (bit_nr & 0x3f);
 807         }
 808
 809         priv->mc_list_count = mc_list->count;
 810
 811         return mc_filter;
 812 }
 813
 814 static void vnt_configure(struct ieee80211_hw *hw,
 815                           unsigned int changed_flags,
 816                           unsigned int *total_flags, u64 multicast)
 817 {
 818         struct vnt_private *priv = hw->priv;
 819         u8 rx_mode = 0;
 820         int rc;
 821
 822         *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC;
 823
 824         rc = vnt_control_in(priv, MESSAGE_TYPE_READ, MAC_REG_RCR,
 825                             MESSAGE_REQUEST_MACREG, sizeof(u8), &rx_mode);
 826
 827         if (!rc)
 828                 rx_mode = RCR_MULTICAST | RCR_BROADCAST;
 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
 996         vnt_set_options(priv);
 997
 998         spin_lock_init(&priv->lock);
 999         mutex_init(&priv->usb_lock);
1000
1001         INIT_DELAYED_WORK(&priv->run_command_work, vnt_run_command);
1002
1003         usb_set_intfdata(intf, priv);
1004
1005         wiphy = priv->hw->wiphy;
1006
1007         wiphy->frag_threshold = FRAG_THRESH_DEF;
1008         wiphy->rts_threshold = RTS_THRESH_DEF;
1009         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1010                 BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP);
1011
1012         ieee80211_hw_set(priv->hw, TIMING_BEACON_ONLY);
1013         ieee80211_hw_set(priv->hw, SIGNAL_DBM);
1014         ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1015         ieee80211_hw_set(priv->hw, REPORTS_TX_ACK_STATUS);
1016         ieee80211_hw_set(priv->hw, SUPPORTS_PS);
1017
1018         priv->hw->max_signal = 100;
1019
1020         SET_IEEE80211_DEV(priv->hw, &intf->dev);
1021
1022         rc = usb_reset_device(priv->usb);
1023         if (rc)
1024                 dev_warn(&priv->usb->dev,
1025                          "%s reset fail status=%d\n", __func__, rc);
1026
1027         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
1028         vnt_reset_command_timer(priv);
1029
1030         vnt_schedule_command(priv, WLAN_CMD_INIT_MAC80211);
1031
1032         return 0;
1033
1034 err_nomem:
1035         usb_put_dev(udev);
1036
1037         return rc;
1038 }
1039
1040 static void vt6656_disconnect(struct usb_interface *intf)
1041 {
1042         struct vnt_private *priv = usb_get_intfdata(intf);
1043
1044         if (!priv)
1045                 return;
1046
1047         if (priv->mac_hw)
1048                 ieee80211_unregister_hw(priv->hw);
1049
1050         usb_set_intfdata(intf, NULL);
1051         usb_put_dev(interface_to_usbdev(intf));
1052
1053         set_bit(DEVICE_FLAGS_UNPLUG, &priv->flags);
1054
1055         ieee80211_free_hw(priv->hw);
1056 }
1057
1058 #ifdef CONFIG_PM
1059
1060 static int vt6656_suspend(struct usb_interface *intf, pm_message_t message)
1061 {
1062         return 0;
1063 }
1064
1065 static int vt6656_resume(struct usb_interface *intf)
1066 {
1067         return 0;
1068 }
1069
1070 #endif /* CONFIG_PM */
1071
1072 MODULE_DEVICE_TABLE(usb, vt6656_table);
1073
1074 static struct usb_driver vt6656_driver = {
1075         .name =         DEVICE_NAME,
1076         .probe =        vt6656_probe,
1077         .disconnect =   vt6656_disconnect,
1078         .id_table =     vt6656_table,
1079 #ifdef CONFIG_PM
1080         .suspend = vt6656_suspend,
1081         .resume = vt6656_resume,
1082 #endif /* CONFIG_PM */
1083 };
1084
1085 module_usb_driver(vt6656_driver);