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