drivers/staging/vt6656/main_usb.c

   1 /*
   2  * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
   3  * All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * File: main_usb.c
  20  *
  21  * Purpose: driver entry for initial, open, close, tx and rx.
  22  *
  23  * Author: Lyndon Chen
  24  *
  25  * Date: Dec 8, 2005
  26  *
  27  * Functions:
  28  *
  29  *   vt6656_probe - module initial (insmod) driver entry
  30  *   vnt_free_tx_bufs - free tx buffer function
  31  *   vnt_init_registers- initial MAC & BBP & RF internal registers.
  32  *
  33  * Revision History:
  34  */
  35 #undef __NO_VERSION__
  36
  37 #include <linux/file.h>
  38 #include "device.h"
  39 #include "card.h"
  40 #include "baseband.h"
  41 #include "mac.h"
  42 #include "power.h"
  43 #include "wcmd.h"
  44 #include "rxtx.h"
  45 #include "dpc.h"
  46 #include "rf.h"
  47 #include "firmware.h"
  48 #include "usbpipe.h"
  49 #include "channel.h"
  50 #include "int.h"
  51
  52 /*
  53  * define module options
  54  */
  55
  56 /* version information */
  57 #define DRIVER_AUTHOR \
  58         "VIA Networking Technologies, Inc., <lyndonchen@vntek.com.tw>"
  59 MODULE_AUTHOR(DRIVER_AUTHOR);
  60 MODULE_LICENSE("GPL");
  61 MODULE_DESCRIPTION(DEVICE_FULL_DRV_NAM);
  62
  63 #define RX_DESC_DEF0 64
  64 static int vnt_rx_buffers = RX_DESC_DEF0;
  65 module_param_named(rx_buffers, vnt_rx_buffers, int, 0644);
  66 MODULE_PARM_DESC(rx_buffers, "Number of receive usb rx buffers");
  67
  68 #define TX_DESC_DEF0 64
  69 static int vnt_tx_buffers = TX_DESC_DEF0;
  70 module_param_named(tx_buffers, vnt_tx_buffers, int, 0644);
  71 MODULE_PARM_DESC(tx_buffers, "Number of receive usb tx buffers");
  72
  73 #define RTS_THRESH_DEF     2347
  74 #define FRAG_THRESH_DEF     2346
  75 #define SHORT_RETRY_DEF     8
  76 #define LONG_RETRY_DEF     4
  77
  78 /* BasebandType[] baseband type selected
  79    0: indicate 802.11a type
  80    1: indicate 802.11b type
  81    2: indicate 802.11g type
  82 */
  83
  84 #define BBP_TYPE_DEF     2
  85
  86 /*
  87  * Static vars definitions
  88  */
  89
  90 static struct usb_device_id vt6656_table[] = {
  91         {USB_DEVICE(VNT_USB_VENDOR_ID, VNT_USB_PRODUCT_ID)},
  92         {}
  93 };
  94
  95 static void vnt_set_options(struct vnt_private *priv)
  96 {
  97         /* Set number of TX buffers */
  98         if (vnt_tx_buffers < CB_MIN_TX_DESC || vnt_tx_buffers > CB_MAX_TX_DESC)
  99                 priv->num_tx_context = TX_DESC_DEF0;
 100         else
 101                 priv->num_tx_context = vnt_tx_buffers;
 102
 103         /* Set number of RX buffers */
 104         if (vnt_rx_buffers < CB_MIN_RX_DESC || vnt_rx_buffers > CB_MAX_RX_DESC)
 105                 priv->num_rcb = RX_DESC_DEF0;
 106         else
 107                 priv->num_rcb = vnt_rx_buffers;
 108
 109         priv->short_retry_limit = SHORT_RETRY_DEF;
 110         priv->long_retry_limit = LONG_RETRY_DEF;
 111         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
 112         priv->bb_type = BBP_TYPE_DEF;
 113         priv->packet_type = priv->bb_type;
 114         priv->auto_fb_ctrl = AUTO_FB_0;
 115         priv->preamble_type = 0;
 116         priv->exist_sw_net_addr = false;
 117 }
 118
 119 /*
 120  * initialization of MAC & BBP registers
 121  */
 122 static int vnt_init_registers(struct vnt_private *priv)
 123 {
 124         struct vnt_cmd_card_init *init_cmd = &priv->init_command;
 125         struct vnt_rsp_card_init *init_rsp = &priv->init_response;
 126         u8 antenna;
 127         int ii;
 128         int status = STATUS_SUCCESS;
 129         u8 tmp;
 130         u8 calib_tx_iq = 0, calib_tx_dc = 0, calib_rx_iq = 0;
 131
 132         dev_dbg(&priv->usb->dev, "---->INIbInitAdapter. [%d][%d]\n",
 133                                 DEVICE_INIT_COLD, priv->packet_type);
 134
 135         if (!vnt_check_firmware_version(priv)) {
 136                 if (vnt_download_firmware(priv) == true) {
 137                         if (vnt_firmware_branch_to_sram(priv) == false) {
 138                                 dev_dbg(&priv->usb->dev,
 139                                         " vnt_firmware_branch_to_sram fail\n");
 140                                 return false;
 141                         }
 142                 } else {
 143                         dev_dbg(&priv->usb->dev, "FIRMWAREbDownload fail\n");
 144                         return false;
 145                 }
 146         }
 147
 148         if (!vnt_vt3184_init(priv)) {
 149                 dev_dbg(&priv->usb->dev, "vnt_vt3184_init fail\n");
 150                 return false;
 151         }
 152
 153         init_cmd->init_class = DEVICE_INIT_COLD;
 154         init_cmd->exist_sw_net_addr = priv->exist_sw_net_addr;
 155         for (ii = 0; ii < 6; ii++)
 156                 init_cmd->sw_net_addr[ii] = priv->current_net_addr[ii];
 157         init_cmd->short_retry_limit = priv->short_retry_limit;
 158         init_cmd->long_retry_limit = priv->long_retry_limit;
 159
 160         /* issue card_init command to device */
 161         status = vnt_control_out(priv,
 162                 MESSAGE_TYPE_CARDINIT, 0, 0,
 163                 sizeof(struct vnt_cmd_card_init), (u8 *)init_cmd);
 164         if (status != STATUS_SUCCESS) {
 165                 dev_dbg(&priv->usb->dev, "Issue Card init fail\n");
 166                 return false;
 167         }
 168
 169         status = vnt_control_in(priv, MESSAGE_TYPE_INIT_RSP, 0, 0,
 170                 sizeof(struct vnt_rsp_card_init), (u8 *)init_rsp);
 171         if (status != STATUS_SUCCESS) {
 172                 dev_dbg(&priv->usb->dev,
 173                         "Cardinit request in status fail!\n");
 174                 return false;
 175         }
 176
 177         /* local ID for AES functions */
 178         status = vnt_control_in(priv, MESSAGE_TYPE_READ,
 179                 MAC_REG_LOCALID, MESSAGE_REQUEST_MACREG, 1,
 180                         &priv->local_id);
 181         if (status != STATUS_SUCCESS)
 182                 return false;
 183
 184         /* do MACbSoftwareReset in MACvInitialize */
 185
 186         priv->top_ofdm_basic_rate = RATE_24M;
 187         priv->top_cck_basic_rate = RATE_1M;
 188
 189         /* target to IF pin while programming to RF chip */
 190         priv->power = 0xFF;
 191
 192         priv->cck_pwr = priv->eeprom[EEP_OFS_PWR_CCK];
 193         priv->ofdm_pwr_g = priv->eeprom[EEP_OFS_PWR_OFDMG];
 194         /* load power table */
 195         for (ii = 0; ii < 14; ii++) {
 196                 priv->cck_pwr_tbl[ii] =
 197                         priv->eeprom[ii + EEP_OFS_CCK_PWR_TBL];
 198                 if (priv->cck_pwr_tbl[ii] == 0)
 199                         priv->cck_pwr_tbl[ii] = priv->cck_pwr;
 200
 201                 priv->ofdm_pwr_tbl[ii] =
 202                                 priv->eeprom[ii + EEP_OFS_OFDM_PWR_TBL];
 203                 if (priv->ofdm_pwr_tbl[ii] == 0)
 204                         priv->ofdm_pwr_tbl[ii] = priv->ofdm_pwr_g;
 205         }
 206
 207         /*
 208          * original zonetype is USA, but custom zonetype is Europe,
 209          * then need to recover 12, 13, 14 channels with 11 channel
 210          */
 211         for (ii = 11; ii < 14; ii++) {
 212                 priv->cck_pwr_tbl[ii] = priv->cck_pwr_tbl[10];
 213                 priv->ofdm_pwr_tbl[ii] = priv->ofdm_pwr_tbl[10];
 214         }
 215
 216         priv->ofdm_pwr_a = 0x34; /* same as RFbMA2829SelectChannel */
 217
 218         /* load OFDM A power table */
 219         for (ii = 0; ii < CB_MAX_CHANNEL_5G; ii++) {
 220                 priv->ofdm_a_pwr_tbl[ii] =
 221                         priv->eeprom[ii + EEP_OFS_OFDMA_PWR_TBL];
 222
 223                 if (priv->ofdm_a_pwr_tbl[ii] == 0)
 224                         priv->ofdm_a_pwr_tbl[ii] = priv->ofdm_pwr_a;
 225         }
 226
 227         antenna = priv->eeprom[EEP_OFS_ANTENNA];
 228
 229         if (antenna & EEP_ANTINV)
 230                 priv->tx_rx_ant_inv = true;
 231         else
 232                 priv->tx_rx_ant_inv = false;
 233
 234         antenna &= (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
 235
 236         if (antenna == 0) /* if not set default is both */
 237                 antenna = (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
 238
 239         if (antenna == (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN)) {
 240                 priv->tx_antenna_mode = ANT_B;
 241                 priv->rx_antenna_sel = 1;
 242
 243                 if (priv->tx_rx_ant_inv == true)
 244                         priv->rx_antenna_mode = ANT_A;
 245                 else
 246                         priv->rx_antenna_mode = ANT_B;
 247         } else  {
 248                 priv->rx_antenna_sel = 0;
 249
 250                 if (antenna & EEP_ANTENNA_AUX) {
 251                         priv->tx_antenna_mode = ANT_A;
 252
 253                         if (priv->tx_rx_ant_inv == true)
 254                                 priv->rx_antenna_mode = ANT_B;
 255                         else
 256                                 priv->rx_antenna_mode = ANT_A;
 257                 } else {
 258                         priv->tx_antenna_mode = ANT_B;
 259
 260                 if (priv->tx_rx_ant_inv == true)
 261                         priv->rx_antenna_mode = ANT_A;
 262                 else
 263                         priv->rx_antenna_mode = ANT_B;
 264                 }
 265         }
 266
 267         /* Set initial antenna mode */
 268         vnt_set_antenna_mode(priv, priv->rx_antenna_mode);
 269
 270         /* get Auto Fall Back type */
 271         priv->auto_fb_ctrl = AUTO_FB_0;
 272
 273         /* default Auto Mode */
 274         priv->bb_type = BB_TYPE_11G;
 275
 276         /* get RFType */
 277         priv->rf_type = init_rsp->rf_type;
 278
 279         /* load vt3266 calibration parameters in EEPROM */
 280         if (priv->rf_type == RF_VT3226D0) {
 281                 if ((priv->eeprom[EEP_OFS_MAJOR_VER] == 0x1) &&
 282                     (priv->eeprom[EEP_OFS_MINOR_VER] >= 0x4)) {
 283
 284                         calib_tx_iq = priv->eeprom[EEP_OFS_CALIB_TX_IQ];
 285                         calib_tx_dc = priv->eeprom[EEP_OFS_CALIB_TX_DC];
 286                         calib_rx_iq = priv->eeprom[EEP_OFS_CALIB_RX_IQ];
 287                         if (calib_tx_iq || calib_tx_dc || calib_rx_iq) {
 288                                 /* CR255, enable TX/RX IQ and
 289                                    DC compensation mode */
 290                                 vnt_control_out_u8(priv,
 291                                                    MESSAGE_REQUEST_BBREG,
 292                                                    0xff,
 293                                                    0x03);
 294                                 /* CR251, TX I/Q Imbalance Calibration */
 295                                 vnt_control_out_u8(priv,
 296                                                    MESSAGE_REQUEST_BBREG,
 297                                                    0xfb,
 298                                                    calib_tx_iq);
 299                                 /* CR252, TX DC-Offset Calibration */
 300                                 vnt_control_out_u8(priv,
 301                                                    MESSAGE_REQUEST_BBREG,
 302                                                    0xfC,
 303                                                    calib_tx_dc);
 304                                 /* CR253, RX I/Q Imbalance Calibration */
 305                                 vnt_control_out_u8(priv,
 306                                                    MESSAGE_REQUEST_BBREG,
 307                                                    0xfd,
 308                                                    calib_rx_iq);
 309                         } else {
 310                                 /* CR255, turn off
 311                                    BB Calibration compensation */
 312                                 vnt_control_out_u8(priv,
 313                                                    MESSAGE_REQUEST_BBREG,
 314                                                    0xff,
 315                                                    0x0);
 316                         }
 317                 }
 318         }
 319
 320         /* get permanent network address */
 321         memcpy(priv->permanent_net_addr, init_rsp->net_addr, 6);
 322         memcpy(priv->current_net_addr, priv->permanent_net_addr, ETH_ALEN);
 323
 324         /* if exist SW network address, use it */
 325         dev_dbg(&priv->usb->dev, "Network address = %pM\n",
 326                 priv->current_net_addr);
 327
 328         /*
 329         * set BB and packet type at the same time
 330         * set Short Slot Time, xIFS, and RSPINF
 331         */
 332         if (priv->bb_type == BB_TYPE_11A)
 333                 priv->short_slot_time = true;
 334         else
 335                 priv->short_slot_time = false;
 336
 337         vnt_set_short_slot_time(priv);
 338
 339         priv->radio_ctl = priv->eeprom[EEP_OFS_RADIOCTL];
 340
 341         if ((priv->radio_ctl & EEP_RADIOCTL_ENABLE) != 0) {
 342                 status = vnt_control_in(priv, MESSAGE_TYPE_READ,
 343                         MAC_REG_GPIOCTL1, MESSAGE_REQUEST_MACREG, 1, &tmp);
 344
 345                 if (status != STATUS_SUCCESS)
 346                         return false;
 347
 348                 if ((tmp & GPIO3_DATA) == 0)
 349                         vnt_mac_reg_bits_on(priv, MAC_REG_GPIOCTL1,
 350                                                                 GPIO3_INTMD);
 351                 else
 352                         vnt_mac_reg_bits_off(priv, MAC_REG_GPIOCTL1,
 353                                                                 GPIO3_INTMD);
 354         }
 355
 356         vnt_mac_set_led(priv, LEDSTS_TMLEN, 0x38);
 357
 358         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_SLOW);
 359
 360         vnt_mac_reg_bits_on(priv, MAC_REG_GPIOCTL0, 0x01);
 361
 362         vnt_radio_power_on(priv);
 363
 364         dev_dbg(&priv->usb->dev, "<----INIbInitAdapter Exit\n");
 365
 366         return true;
 367 }
 368
 369 static void vnt_free_tx_bufs(struct vnt_private *priv)
 370 {
 371         struct vnt_usb_send_context *tx_context;
 372         int ii;
 373
 374         for (ii = 0; ii < priv->num_tx_context; ii++) {
 375                 tx_context = priv->tx_context[ii];
 376                 /* deallocate URBs */
 377                 if (tx_context->urb) {
 378                         usb_kill_urb(tx_context->urb);
 379                         usb_free_urb(tx_context->urb);
 380                 }
 381
 382                 kfree(tx_context);
 383         }
 384 }
 385
 386 static void vnt_free_rx_bufs(struct vnt_private *priv)
 387 {
 388         struct vnt_rcb *rcb;
 389         int ii;
 390
 391         for (ii = 0; ii < priv->num_rcb; ii++) {
 392                 rcb = priv->rcb[ii];
 393                 if (!rcb)
 394                         continue;
 395
 396                 /* deallocate URBs */
 397                 if (rcb->urb) {
 398                         usb_kill_urb(rcb->urb);
 399                         usb_free_urb(rcb->urb);
 400                 }
 401
 402                 /* deallocate skb */
 403                 if (rcb->skb)
 404                         dev_kfree_skb(rcb->skb);
 405
 406                 kfree(rcb);
 407         }
 408 }
 409
 410 static void usb_device_reset(struct vnt_private *priv)
 411 {
 412         int status;
 413
 414         status = usb_reset_device(priv->usb);
 415         if (status)
 416                 dev_warn(&priv->usb->dev,
 417                          "usb_device_reset fail status=%d\n", status);
 418 }
 419
 420 static void vnt_free_int_bufs(struct vnt_private *priv)
 421 {
 422         kfree(priv->int_buf.data_buf);
 423 }
 424
 425 static bool vnt_alloc_bufs(struct vnt_private *priv)
 426 {
 427         struct vnt_usb_send_context *tx_context;
 428         struct vnt_rcb *rcb;
 429         int ii;
 430
 431         for (ii = 0; ii < priv->num_tx_context; ii++) {
 432                 tx_context = kmalloc(sizeof(struct vnt_usb_send_context),
 433                                                                 GFP_KERNEL);
 434                 if (tx_context == NULL)
 435                         goto free_tx;
 436
 437                 priv->tx_context[ii] = tx_context;
 438                 tx_context->priv = priv;
 439                 tx_context->pkt_no = ii;
 440
 441                 /* allocate URBs */
 442                 tx_context->urb = usb_alloc_urb(0, GFP_ATOMIC);
 443                 if (!tx_context->urb) {
 444                         dev_err(&priv->usb->dev, "alloc tx urb failed\n");
 445                         goto free_tx;
 446                 }
 447
 448                 tx_context->in_use = false;
 449         }
 450
 451         for (ii = 0; ii < priv->num_rcb; ii++) {
 452                 priv->rcb[ii] = kzalloc(sizeof(struct vnt_rcb), GFP_KERNEL);
 453                 if (!priv->rcb[ii]) {
 454                         dev_err(&priv->usb->dev,
 455                                         "failed to allocate rcb no %d\n", ii);
 456                         goto free_rx_tx;
 457                 }
 458
 459                 rcb = priv->rcb[ii];
 460
 461                 rcb->priv = priv;
 462
 463                 /* allocate URBs */
 464                 rcb->urb = usb_alloc_urb(0, GFP_ATOMIC);
 465                 if (rcb->urb == NULL) {
 466                         dev_err(&priv->usb->dev, "Failed to alloc rx urb\n");
 467                         goto free_rx_tx;
 468                 }
 469
 470                 rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
 471                 if (rcb->skb == NULL)
 472                         goto free_rx_tx;
 473
 474                 rcb->in_use = false;
 475
 476                 /* submit rx urb */
 477                 if (vnt_submit_rx_urb(priv, rcb))
 478                         goto free_rx_tx;
 479         }
 480
 481         priv->interrupt_urb = usb_alloc_urb(0, GFP_ATOMIC);
 482         if (priv->interrupt_urb == NULL) {
 483                 dev_err(&priv->usb->dev, "Failed to alloc int urb\n");
 484                 goto free_rx_tx;
 485         }
 486
 487         priv->int_buf.data_buf = kmalloc(MAX_INTERRUPT_SIZE, GFP_KERNEL);
 488         if (priv->int_buf.data_buf == NULL) {
 489                 usb_free_urb(priv->interrupt_urb);
 490                 goto free_rx_tx;
 491         }
 492
 493         return true;
 494
 495 free_rx_tx:
 496         vnt_free_rx_bufs(priv);
 497
 498 free_tx:
 499         vnt_free_tx_bufs(priv);
 500
 501         return false;
 502 }
 503
 504 static void vnt_tx_80211(struct ieee80211_hw *hw,
 505         struct ieee80211_tx_control *control, struct sk_buff *skb)
 506 {
 507         struct vnt_private *priv = hw->priv;
 508
 509         ieee80211_stop_queues(hw);
 510
 511         if (vnt_tx_packet(priv, skb)) {
 512                 ieee80211_free_txskb(hw, skb);
 513
 514                 ieee80211_wake_queues(hw);
 515         }
 516 }
 517
 518 static int vnt_start(struct ieee80211_hw *hw)
 519 {
 520         struct vnt_private *priv = hw->priv;
 521
 522         priv->rx_buf_sz = MAX_TOTAL_SIZE_WITH_ALL_HEADERS;
 523
 524         if (vnt_alloc_bufs(priv) == false) {
 525                 dev_dbg(&priv->usb->dev, "vnt_alloc_bufs fail...\n");
 526                 return -ENOMEM;
 527         }
 528
 529         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
 530
 531         if (vnt_init_registers(priv) == false) {
 532                 dev_dbg(&priv->usb->dev, " init register fail\n");
 533                 goto free_all;
 534         }
 535
 536         priv->int_interval = 1;  /* bInterval is set to 1 */
 537
 538         vnt_int_start_interrupt(priv);
 539
 540         ieee80211_wake_queues(hw);
 541
 542         return 0;
 543
 544 free_all:
 545         vnt_free_rx_bufs(priv);
 546         vnt_free_tx_bufs(priv);
 547         vnt_free_int_bufs(priv);
 548
 549         usb_kill_urb(priv->interrupt_urb);
 550         usb_free_urb(priv->interrupt_urb);
 551
 552         return -ENOMEM;
 553 }
 554
 555 static void vnt_stop(struct ieee80211_hw *hw)
 556 {
 557         struct vnt_private *priv = hw->priv;
 558         int i;
 559
 560         if (!priv)
 561                 return;
 562
 563         for (i = 0; i < MAX_KEY_TABLE; i++)
 564                 vnt_mac_disable_keyentry(priv, i);
 565
 566         /* clear all keys */
 567         priv->key_entry_inuse = 0;
 568
 569         if (!test_bit(DEVICE_FLAGS_UNPLUG, &priv->flags))
 570                 vnt_mac_shutdown(priv);
 571
 572         ieee80211_stop_queues(hw);
 573
 574         set_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
 575
 576         cancel_delayed_work_sync(&priv->run_command_work);
 577
 578         priv->cmd_running = false;
 579
 580         vnt_free_tx_bufs(priv);
 581         vnt_free_rx_bufs(priv);
 582         vnt_free_int_bufs(priv);
 583
 584         usb_kill_urb(priv->interrupt_urb);
 585         usb_free_urb(priv->interrupt_urb);
 586 }
 587
 588 static int vnt_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 589 {
 590         struct vnt_private *priv = hw->priv;
 591
 592         priv->vif = vif;
 593
 594         switch (vif->type) {
 595         case NL80211_IFTYPE_STATION:
 596                 break;
 597         case NL80211_IFTYPE_ADHOC:
 598                 vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
 599
 600                 vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
 601
 602                 break;
 603         case NL80211_IFTYPE_AP:
 604                 vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
 605
 606                 vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_AP);
 607
 608                 break;
 609         default:
 610                 return -EOPNOTSUPP;
 611         }
 612
 613         priv->op_mode = vif->type;
 614
 615         vnt_set_bss_mode(priv);
 616
 617         /* LED blink on TX */
 618         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_INTER);
 619
 620         return 0;
 621 }
 622
 623 static void vnt_remove_interface(struct ieee80211_hw *hw,
 624                 struct ieee80211_vif *vif)
 625 {
 626         struct vnt_private *priv = hw->priv;
 627
 628         switch (vif->type) {
 629         case NL80211_IFTYPE_STATION:
 630                 break;
 631         case NL80211_IFTYPE_ADHOC:
 632                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 633                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 634                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
 635                 break;
 636         case NL80211_IFTYPE_AP:
 637                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 638                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 639                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_AP);
 640                 break;
 641         default:
 642                 break;
 643         }
 644
 645         vnt_radio_power_off(priv);
 646
 647         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
 648
 649         /* LED slow blink */
 650         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_SLOW);
 651 }
 652
 653 static int vnt_config(struct ieee80211_hw *hw, u32 changed)
 654 {
 655         struct vnt_private *priv = hw->priv;
 656         struct ieee80211_conf *conf = &hw->conf;
 657         u8 bb_type;
 658
 659         if (changed & IEEE80211_CONF_CHANGE_PS) {
 660                 if (conf->flags & IEEE80211_CONF_PS)
 661                         vnt_enable_power_saving(priv, conf->listen_interval);
 662                 else
 663                         vnt_disable_power_saving(priv);
 664         }
 665
 666         if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) ||
 667                         (conf->flags & IEEE80211_CONF_OFFCHANNEL)) {
 668                 vnt_set_channel(priv, conf->chandef.chan->hw_value);
 669
 670                 if (conf->chandef.chan->band == IEEE80211_BAND_5GHZ)
 671                         bb_type = BB_TYPE_11A;
 672                 else
 673                         bb_type = BB_TYPE_11G;
 674
 675                 if (priv->bb_type != bb_type) {
 676                         priv->bb_type = bb_type;
 677
 678                         vnt_set_bss_mode(priv);
 679                 }
 680         }
 681
 682         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 683                 if (priv->bb_type == BB_TYPE_11B)
 684                         priv->current_rate = RATE_1M;
 685                 else
 686                         priv->current_rate = RATE_54M;
 687
 688                 vnt_rf_setpower(priv, priv->current_rate,
 689                                 conf->chandef.chan->hw_value);
 690         }
 691
 692         return 0;
 693 }
 694
 695 static void vnt_bss_info_changed(struct ieee80211_hw *hw,
 696                 struct ieee80211_vif *vif, struct ieee80211_bss_conf *conf,
 697                 u32 changed)
 698 {
 699         struct vnt_private *priv = hw->priv;
 700
 701         priv->current_aid = conf->aid;
 702
 703         if (changed & BSS_CHANGED_BSSID)
 704                 vnt_mac_set_bssid_addr(priv, (u8 *)conf->bssid);
 705
 706
 707         if (changed & BSS_CHANGED_BASIC_RATES) {
 708                 priv->basic_rates = conf->basic_rates;
 709
 710                 vnt_update_top_rates(priv);
 711
 712                 dev_dbg(&priv->usb->dev, "basic rates %x\n", conf->basic_rates);
 713         }
 714
 715         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
 716                 if (conf->use_short_preamble) {
 717                         vnt_mac_enable_barker_preamble_mode(priv);
 718                         priv->preamble_type = true;
 719                 } else {
 720                         vnt_mac_disable_barker_preamble_mode(priv);
 721                         priv->preamble_type = false;
 722                 }
 723         }
 724
 725         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
 726                 if (conf->use_cts_prot)
 727                         vnt_mac_enable_protect_mode(priv);
 728                 else
 729                         vnt_mac_disable_protect_mode(priv);
 730         }
 731
 732         if (changed & BSS_CHANGED_ERP_SLOT) {
 733                 if (conf->use_short_slot)
 734                         priv->short_slot_time = true;
 735                 else
 736                         priv->short_slot_time = false;
 737
 738                 vnt_set_short_slot_time(priv);
 739                 vnt_set_vga_gain_offset(priv, priv->bb_vga[0]);
 740                 vnt_update_pre_ed_threshold(priv, false);
 741         }
 742
 743         if (changed & BSS_CHANGED_TXPOWER)
 744                 vnt_rf_setpower(priv, priv->current_rate,
 745                                         conf->chandef.chan->hw_value);
 746
 747         if (changed & BSS_CHANGED_BEACON_ENABLED) {
 748                 dev_dbg(&priv->usb->dev,
 749                                 "Beacon enable %d\n", conf->enable_beacon);
 750
 751                 if (conf->enable_beacon) {
 752                         vnt_beacon_enable(priv, vif, conf);
 753
 754                         vnt_mac_reg_bits_on(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 755                 } else {
 756                         vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 757                 }
 758         }
 759 }
 760
 761 static u64 vnt_prepare_multicast(struct ieee80211_hw *hw,
 762         struct netdev_hw_addr_list *mc_list)
 763 {
 764         struct vnt_private *priv = hw->priv;
 765         struct netdev_hw_addr *ha;
 766         u64 mc_filter = 0;
 767         u32 bit_nr = 0;
 768
 769         netdev_hw_addr_list_for_each(ha, mc_list) {
 770                 bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
 771
 772                 mc_filter |= 1ULL << (bit_nr & 0x3f);
 773         }
 774
 775         priv->mc_list_count = mc_list->count;
 776
 777         return mc_filter;
 778 }
 779
 780 static void vnt_configure(struct ieee80211_hw *hw,
 781         unsigned int changed_flags, unsigned int *total_flags, u64 multicast)
 782 {
 783         struct vnt_private *priv = hw->priv;
 784         u8 rx_mode = 0;
 785         int rc;
 786
 787         *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS | FIF_PROMISC_IN_BSS |
 788                 FIF_BCN_PRBRESP_PROMISC;
 789
 790         rc = vnt_control_in(priv, MESSAGE_TYPE_READ, MAC_REG_RCR,
 791                 MESSAGE_REQUEST_MACREG, sizeof(u8), &rx_mode);
 792
 793         if (!rc)
 794                 rx_mode = RCR_MULTICAST | RCR_BROADCAST;
 795
 796         dev_dbg(&priv->usb->dev, "rx mode in = %x\n", rx_mode);
 797
 798         if (changed_flags & FIF_PROMISC_IN_BSS) {
 799                 /* unconditionally log net taps */
 800                 if (*total_flags & FIF_PROMISC_IN_BSS)
 801                         rx_mode |= RCR_UNICAST;
 802                 else
 803                         rx_mode &= ~RCR_UNICAST;
 804         }
 805
 806         if (changed_flags & FIF_ALLMULTI) {
 807                 if (*total_flags & FIF_ALLMULTI) {
 808                         if (priv->mc_list_count > 2)
 809                                 vnt_mac_set_filter(priv, ~0);
 810                         else
 811                                 vnt_mac_set_filter(priv, multicast);
 812
 813                         rx_mode |= RCR_MULTICAST | RCR_BROADCAST;
 814                 } else {
 815                         rx_mode &= ~(RCR_MULTICAST | RCR_BROADCAST);
 816                 }
 817
 818         }
 819
 820         if (changed_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC)) {
 821                 if (*total_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC))
 822                         rx_mode &= ~RCR_BSSID;
 823                 else
 824                         rx_mode |= RCR_BSSID;
 825         }
 826
 827         vnt_control_out_u8(priv, MESSAGE_REQUEST_MACREG, MAC_REG_RCR, rx_mode);
 828
 829         dev_dbg(&priv->usb->dev, "rx mode out= %x\n", rx_mode);
 830 }
 831
 832 static int vnt_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 833         struct ieee80211_vif *vif, struct ieee80211_sta *sta,
 834                 struct ieee80211_key_conf *key)
 835 {
 836         struct vnt_private *priv = hw->priv;
 837
 838         switch (cmd) {
 839         case SET_KEY:
 840                 if (vnt_set_keys(hw, sta, vif, key))
 841                         return -EOPNOTSUPP;
 842                 break;
 843         case DISABLE_KEY:
 844                 if (test_bit(key->hw_key_idx, &priv->key_entry_inuse))
 845                         clear_bit(key->hw_key_idx, &priv->key_entry_inuse);
 846         default:
 847                 break;
 848         }
 849
 850         return 0;
 851 }
 852
 853 static void vnt_sw_scan_start(struct ieee80211_hw *hw,
 854                               struct ieee80211_vif *vif,
 855                               const u8 *addr)
 856 {
 857         struct vnt_private *priv = hw->priv;
 858
 859         vnt_set_bss_mode(priv);
 860         /* Set max sensitivity*/
 861         vnt_update_pre_ed_threshold(priv, true);
 862 }
 863
 864 static void vnt_sw_scan_complete(struct ieee80211_hw *hw,
 865                                  struct ieee80211_vif *vif)
 866 {
 867         struct vnt_private *priv = hw->priv;
 868
 869         /* Return sensitivity to channel level*/
 870         vnt_update_pre_ed_threshold(priv, false);
 871 }
 872
 873 static int vnt_get_stats(struct ieee80211_hw *hw,
 874                                 struct ieee80211_low_level_stats *stats)
 875 {
 876         struct vnt_private *priv = hw->priv;
 877
 878         memcpy(stats, &priv->low_stats, sizeof(*stats));
 879
 880         return 0;
 881 }
 882
 883 static u64 vnt_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 884 {
 885         struct vnt_private *priv = hw->priv;
 886
 887         return priv->current_tsf;
 888 }
 889
 890 static void vnt_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 891                         u64 tsf)
 892 {
 893         struct vnt_private *priv = hw->priv;
 894
 895         vnt_update_next_tbtt(priv, tsf, vif->bss_conf.beacon_int);
 896 }
 897
 898 static void vnt_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 899 {
 900         struct vnt_private *priv = hw->priv;
 901
 902         vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 903
 904         vnt_clear_current_tsf(priv);
 905 }
 906
 907 static const struct ieee80211_ops vnt_mac_ops = {
 908         .tx                     = vnt_tx_80211,
 909         .start                  = vnt_start,
 910         .stop                   = vnt_stop,
 911         .add_interface          = vnt_add_interface,
 912         .remove_interface       = vnt_remove_interface,
 913         .config                 = vnt_config,
 914         .bss_info_changed       = vnt_bss_info_changed,
 915         .prepare_multicast      = vnt_prepare_multicast,
 916         .configure_filter       = vnt_configure,
 917         .set_key                = vnt_set_key,
 918         .sw_scan_start          = vnt_sw_scan_start,
 919         .sw_scan_complete       = vnt_sw_scan_complete,
 920         .get_stats              = vnt_get_stats,
 921         .get_tsf                = vnt_get_tsf,
 922         .set_tsf                = vnt_set_tsf,
 923         .reset_tsf              = vnt_reset_tsf,
 924 };
 925
 926 int vnt_init(struct vnt_private *priv)
 927 {
 928
 929         if (!(vnt_init_registers(priv)))
 930                 return -EAGAIN;
 931
 932         SET_IEEE80211_PERM_ADDR(priv->hw, priv->permanent_net_addr);
 933
 934         vnt_init_bands(priv);
 935
 936         if (ieee80211_register_hw(priv->hw))
 937                 return -ENODEV;
 938
 939         priv->mac_hw = true;
 940
 941         vnt_radio_power_off(priv);
 942
 943         return 0;
 944 }
 945
 946 static int
 947 vt6656_probe(struct usb_interface *intf, const struct usb_device_id *id)
 948 {
 949         struct usb_device *udev;
 950         struct vnt_private *priv;
 951         struct ieee80211_hw *hw;
 952         struct wiphy *wiphy;
 953         int rc = 0;
 954
 955         udev = usb_get_dev(interface_to_usbdev(intf));
 956
 957         dev_notice(&udev->dev, "%s Ver. %s\n",
 958                                         DEVICE_FULL_DRV_NAM, DEVICE_VERSION);
 959         dev_notice(&udev->dev,
 960                 "Copyright (c) 2004 VIA Networking Technologies, Inc.\n");
 961
 962         hw = ieee80211_alloc_hw(sizeof(struct vnt_private), &vnt_mac_ops);
 963         if (!hw) {
 964                 dev_err(&udev->dev, "could not register ieee80211_hw\n");
 965                 goto err_nomem;
 966         }
 967
 968         priv = hw->priv;
 969         priv->hw = hw;
 970         priv->usb = udev;
 971
 972         vnt_set_options(priv);
 973
 974         spin_lock_init(&priv->lock);
 975         mutex_init(&priv->usb_lock);
 976
 977         INIT_DELAYED_WORK(&priv->run_command_work, vnt_run_command);
 978
 979         usb_set_intfdata(intf, priv);
 980
 981         wiphy = priv->hw->wiphy;
 982
 983         wiphy->frag_threshold = FRAG_THRESH_DEF;
 984         wiphy->rts_threshold = RTS_THRESH_DEF;
 985         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 986                 BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP);
 987
 988         priv->hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
 989                 IEEE80211_HW_REPORTS_TX_ACK_STATUS |
 990                 IEEE80211_HW_SIGNAL_DBM |
 991                 IEEE80211_HW_TIMING_BEACON_ONLY;
 992
 993         priv->hw->max_signal = 100;
 994
 995         SET_IEEE80211_DEV(priv->hw, &intf->dev);
 996
 997         usb_device_reset(priv);
 998
 999         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
1000         vnt_reset_command_timer(priv);
1001
1002         vnt_schedule_command(priv, WLAN_CMD_INIT_MAC80211);
1003
1004         return 0;
1005
1006 err_nomem:
1007         usb_put_dev(udev);
1008
1009         return rc;
1010 }
1011
1012 static void vt6656_disconnect(struct usb_interface *intf)
1013 {
1014         struct vnt_private *priv = usb_get_intfdata(intf);
1015
1016         if (!priv)
1017                 return;
1018
1019         if (priv->mac_hw)
1020                 ieee80211_unregister_hw(priv->hw);
1021
1022         usb_set_intfdata(intf, NULL);
1023         usb_put_dev(interface_to_usbdev(intf));
1024
1025         set_bit(DEVICE_FLAGS_UNPLUG, &priv->flags);
1026
1027         ieee80211_free_hw(priv->hw);
1028 }
1029
1030 #ifdef CONFIG_PM
1031
1032 static int vt6656_suspend(struct usb_interface *intf, pm_message_t message)
1033 {
1034         return 0;
1035 }
1036
1037 static int vt6656_resume(struct usb_interface *intf)
1038 {
1039         return 0;
1040 }
1041
1042 #endif /* CONFIG_PM */
1043
1044 MODULE_DEVICE_TABLE(usb, vt6656_table);
1045
1046 static struct usb_driver vt6656_driver = {
1047         .name =         DEVICE_NAME,
1048         .probe =        vt6656_probe,
1049         .disconnect =   vt6656_disconnect,
1050         .id_table =     vt6656_table,
1051 #ifdef CONFIG_PM
1052         .suspend = vt6656_suspend,
1053         .resume = vt6656_resume,
1054 #endif /* CONFIG_PM */
1055 };
1056
1057 module_usb_driver(vt6656_driver);