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         ieee80211_stop_queues(hw);
 511
 512         if (vnt_tx_packet(priv, skb)) {
 513                 ieee80211_free_txskb(hw, skb);
 514
 515                 ieee80211_wake_queues(hw);
 516         }
 517 }
 518
 519 static int vnt_start(struct ieee80211_hw *hw)
 520 {
 521         struct vnt_private *priv = hw->priv;
 522
 523         priv->rx_buf_sz = MAX_TOTAL_SIZE_WITH_ALL_HEADERS;
 524
 525         if (!vnt_alloc_bufs(priv)) {
 526                 dev_dbg(&priv->usb->dev, "vnt_alloc_bufs fail...\n");
 527                 return -ENOMEM;
 528         }
 529
 530         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
 531
 532         if (vnt_init_registers(priv) == false) {
 533                 dev_dbg(&priv->usb->dev, " init register fail\n");
 534                 goto free_all;
 535         }
 536
 537         priv->int_interval = 1;  /* bInterval is set to 1 */
 538
 539         vnt_int_start_interrupt(priv);
 540
 541         ieee80211_wake_queues(hw);
 542
 543         return 0;
 544
 545 free_all:
 546         vnt_free_rx_bufs(priv);
 547         vnt_free_tx_bufs(priv);
 548         vnt_free_int_bufs(priv);
 549
 550         usb_kill_urb(priv->interrupt_urb);
 551         usb_free_urb(priv->interrupt_urb);
 552
 553         return -ENOMEM;
 554 }
 555
 556 static void vnt_stop(struct ieee80211_hw *hw)
 557 {
 558         struct vnt_private *priv = hw->priv;
 559         int i;
 560
 561         if (!priv)
 562                 return;
 563
 564         for (i = 0; i < MAX_KEY_TABLE; i++)
 565                 vnt_mac_disable_keyentry(priv, i);
 566
 567         /* clear all keys */
 568         priv->key_entry_inuse = 0;
 569
 570         if (!test_bit(DEVICE_FLAGS_UNPLUG, &priv->flags))
 571                 vnt_mac_shutdown(priv);
 572
 573         ieee80211_stop_queues(hw);
 574
 575         set_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
 576
 577         cancel_delayed_work_sync(&priv->run_command_work);
 578
 579         priv->cmd_running = false;
 580
 581         vnt_free_tx_bufs(priv);
 582         vnt_free_rx_bufs(priv);
 583         vnt_free_int_bufs(priv);
 584
 585         usb_kill_urb(priv->interrupt_urb);
 586         usb_free_urb(priv->interrupt_urb);
 587 }
 588
 589 static int vnt_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 590 {
 591         struct vnt_private *priv = hw->priv;
 592
 593         priv->vif = vif;
 594
 595         switch (vif->type) {
 596         case NL80211_IFTYPE_STATION:
 597                 break;
 598         case NL80211_IFTYPE_ADHOC:
 599                 vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
 600
 601                 vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
 602
 603                 break;
 604         case NL80211_IFTYPE_AP:
 605                 vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
 606
 607                 vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_AP);
 608
 609                 break;
 610         default:
 611                 return -EOPNOTSUPP;
 612         }
 613
 614         priv->op_mode = vif->type;
 615
 616         vnt_set_bss_mode(priv);
 617
 618         /* LED blink on TX */
 619         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_INTER);
 620
 621         return 0;
 622 }
 623
 624 static void vnt_remove_interface(struct ieee80211_hw *hw,
 625                 struct ieee80211_vif *vif)
 626 {
 627         struct vnt_private *priv = hw->priv;
 628
 629         switch (vif->type) {
 630         case NL80211_IFTYPE_STATION:
 631                 break;
 632         case NL80211_IFTYPE_ADHOC:
 633                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 634                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 635                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
 636                 break;
 637         case NL80211_IFTYPE_AP:
 638                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 639                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 640                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_AP);
 641                 break;
 642         default:
 643                 break;
 644         }
 645
 646         vnt_radio_power_off(priv);
 647
 648         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
 649
 650         /* LED slow blink */
 651         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_SLOW);
 652 }
 653
 654 static int vnt_config(struct ieee80211_hw *hw, u32 changed)
 655 {
 656         struct vnt_private *priv = hw->priv;
 657         struct ieee80211_conf *conf = &hw->conf;
 658         u8 bb_type;
 659
 660         if (changed & IEEE80211_CONF_CHANGE_PS) {
 661                 if (conf->flags & IEEE80211_CONF_PS)
 662                         vnt_enable_power_saving(priv, conf->listen_interval);
 663                 else
 664                         vnt_disable_power_saving(priv);
 665         }
 666
 667         if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) ||
 668                         (conf->flags & IEEE80211_CONF_OFFCHANNEL)) {
 669                 vnt_set_channel(priv, conf->chandef.chan->hw_value);
 670
 671                 if (conf->chandef.chan->band == IEEE80211_BAND_5GHZ)
 672                         bb_type = BB_TYPE_11A;
 673                 else
 674                         bb_type = BB_TYPE_11G;
 675
 676                 if (priv->bb_type != bb_type) {
 677                         priv->bb_type = bb_type;
 678
 679                         vnt_set_bss_mode(priv);
 680                 }
 681         }
 682
 683         if (changed & IEEE80211_CONF_CHANGE_POWER) {
 684                 if (priv->bb_type == BB_TYPE_11B)
 685                         priv->current_rate = RATE_1M;
 686                 else
 687                         priv->current_rate = RATE_54M;
 688
 689                 vnt_rf_setpower(priv, priv->current_rate,
 690                                 conf->chandef.chan->hw_value);
 691         }
 692
 693         return 0;
 694 }
 695
 696 static void vnt_bss_info_changed(struct ieee80211_hw *hw,
 697                 struct ieee80211_vif *vif, struct ieee80211_bss_conf *conf,
 698                 u32 changed)
 699 {
 700         struct vnt_private *priv = hw->priv;
 701
 702         priv->current_aid = conf->aid;
 703
 704         if (changed & BSS_CHANGED_BSSID && conf->bssid)
 705                 vnt_mac_set_bssid_addr(priv, (u8 *)conf->bssid);
 706
 707
 708         if (changed & BSS_CHANGED_BASIC_RATES) {
 709                 priv->basic_rates = conf->basic_rates;
 710
 711                 vnt_update_top_rates(priv);
 712
 713                 dev_dbg(&priv->usb->dev, "basic rates %x\n", conf->basic_rates);
 714         }
 715
 716         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
 717                 if (conf->use_short_preamble) {
 718                         vnt_mac_enable_barker_preamble_mode(priv);
 719                         priv->preamble_type = true;
 720                 } else {
 721                         vnt_mac_disable_barker_preamble_mode(priv);
 722                         priv->preamble_type = false;
 723                 }
 724         }
 725
 726         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
 727                 if (conf->use_cts_prot)
 728                         vnt_mac_enable_protect_mode(priv);
 729                 else
 730                         vnt_mac_disable_protect_mode(priv);
 731         }
 732
 733         if (changed & BSS_CHANGED_ERP_SLOT) {
 734                 if (conf->use_short_slot)
 735                         priv->short_slot_time = true;
 736                 else
 737                         priv->short_slot_time = false;
 738
 739                 vnt_set_short_slot_time(priv);
 740                 vnt_set_vga_gain_offset(priv, priv->bb_vga[0]);
 741                 vnt_update_pre_ed_threshold(priv, false);
 742         }
 743
 744         if (changed & BSS_CHANGED_TXPOWER)
 745                 vnt_rf_setpower(priv, priv->current_rate,
 746                                         conf->chandef.chan->hw_value);
 747
 748         if (changed & BSS_CHANGED_BEACON_ENABLED) {
 749                 dev_dbg(&priv->usb->dev,
 750                                 "Beacon enable %d\n", conf->enable_beacon);
 751
 752                 if (conf->enable_beacon) {
 753                         vnt_beacon_enable(priv, vif, conf);
 754
 755                         vnt_mac_reg_bits_on(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 756                 } else {
 757                         vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
 758                 }
 759         }
 760 }
 761
 762 static u64 vnt_prepare_multicast(struct ieee80211_hw *hw,
 763         struct netdev_hw_addr_list *mc_list)
 764 {
 765         struct vnt_private *priv = hw->priv;
 766         struct netdev_hw_addr *ha;
 767         u64 mc_filter = 0;
 768         u32 bit_nr = 0;
 769
 770         netdev_hw_addr_list_for_each(ha, mc_list) {
 771                 bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
 772
 773                 mc_filter |= 1ULL << (bit_nr & 0x3f);
 774         }
 775
 776         priv->mc_list_count = mc_list->count;
 777
 778         return mc_filter;
 779 }
 780
 781 static void vnt_configure(struct ieee80211_hw *hw,
 782         unsigned int changed_flags, unsigned int *total_flags, u64 multicast)
 783 {
 784         struct vnt_private *priv = hw->priv;
 785         u8 rx_mode = 0;
 786         int rc;
 787
 788         *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS | 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_ALLMULTI) {
 799                 if (*total_flags & FIF_ALLMULTI) {
 800                         if (priv->mc_list_count > 2)
 801                                 vnt_mac_set_filter(priv, ~0);
 802                         else
 803                                 vnt_mac_set_filter(priv, multicast);
 804
 805                         rx_mode |= RCR_MULTICAST | RCR_BROADCAST;
 806                 } else {
 807                         rx_mode &= ~(RCR_MULTICAST | RCR_BROADCAST);
 808                 }
 809
 810         }
 811
 812         if (changed_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC)) {
 813                 if (*total_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC))
 814                         rx_mode &= ~RCR_BSSID;
 815                 else
 816                         rx_mode |= RCR_BSSID;
 817         }
 818
 819         vnt_control_out_u8(priv, MESSAGE_REQUEST_MACREG, MAC_REG_RCR, rx_mode);
 820
 821         dev_dbg(&priv->usb->dev, "rx mode out= %x\n", rx_mode);
 822 }
 823
 824 static int vnt_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 825         struct ieee80211_vif *vif, struct ieee80211_sta *sta,
 826                 struct ieee80211_key_conf *key)
 827 {
 828         struct vnt_private *priv = hw->priv;
 829
 830         switch (cmd) {
 831         case SET_KEY:
 832                 if (vnt_set_keys(hw, sta, vif, key))
 833                         return -EOPNOTSUPP;
 834                 break;
 835         case DISABLE_KEY:
 836                 if (test_bit(key->hw_key_idx, &priv->key_entry_inuse))
 837                         clear_bit(key->hw_key_idx, &priv->key_entry_inuse);
 838         default:
 839                 break;
 840         }
 841
 842         return 0;
 843 }
 844
 845 static void vnt_sw_scan_start(struct ieee80211_hw *hw,
 846                               struct ieee80211_vif *vif,
 847                               const u8 *addr)
 848 {
 849         struct vnt_private *priv = hw->priv;
 850
 851         vnt_set_bss_mode(priv);
 852         /* Set max sensitivity*/
 853         vnt_update_pre_ed_threshold(priv, true);
 854 }
 855
 856 static void vnt_sw_scan_complete(struct ieee80211_hw *hw,
 857                                  struct ieee80211_vif *vif)
 858 {
 859         struct vnt_private *priv = hw->priv;
 860
 861         /* Return sensitivity to channel level*/
 862         vnt_update_pre_ed_threshold(priv, false);
 863 }
 864
 865 static int vnt_get_stats(struct ieee80211_hw *hw,
 866                                 struct ieee80211_low_level_stats *stats)
 867 {
 868         struct vnt_private *priv = hw->priv;
 869
 870         memcpy(stats, &priv->low_stats, sizeof(*stats));
 871
 872         return 0;
 873 }
 874
 875 static u64 vnt_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 876 {
 877         struct vnt_private *priv = hw->priv;
 878
 879         return priv->current_tsf;
 880 }
 881
 882 static void vnt_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 883                         u64 tsf)
 884 {
 885         struct vnt_private *priv = hw->priv;
 886
 887         vnt_update_next_tbtt(priv, tsf, vif->bss_conf.beacon_int);
 888 }
 889
 890 static void vnt_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
 891 {
 892         struct vnt_private *priv = hw->priv;
 893
 894         vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 895
 896         vnt_clear_current_tsf(priv);
 897 }
 898
 899 static const struct ieee80211_ops vnt_mac_ops = {
 900         .tx                     = vnt_tx_80211,
 901         .start                  = vnt_start,
 902         .stop                   = vnt_stop,
 903         .add_interface          = vnt_add_interface,
 904         .remove_interface       = vnt_remove_interface,
 905         .config                 = vnt_config,
 906         .bss_info_changed       = vnt_bss_info_changed,
 907         .prepare_multicast      = vnt_prepare_multicast,
 908         .configure_filter       = vnt_configure,
 909         .set_key                = vnt_set_key,
 910         .sw_scan_start          = vnt_sw_scan_start,
 911         .sw_scan_complete       = vnt_sw_scan_complete,
 912         .get_stats              = vnt_get_stats,
 913         .get_tsf                = vnt_get_tsf,
 914         .set_tsf                = vnt_set_tsf,
 915         .reset_tsf              = vnt_reset_tsf,
 916 };
 917
 918 int vnt_init(struct vnt_private *priv)
 919 {
 920
 921         if (!(vnt_init_registers(priv)))
 922                 return -EAGAIN;
 923
 924         SET_IEEE80211_PERM_ADDR(priv->hw, priv->permanent_net_addr);
 925
 926         vnt_init_bands(priv);
 927
 928         if (ieee80211_register_hw(priv->hw))
 929                 return -ENODEV;
 930
 931         priv->mac_hw = true;
 932
 933         vnt_radio_power_off(priv);
 934
 935         return 0;
 936 }
 937
 938 static int
 939 vt6656_probe(struct usb_interface *intf, const struct usb_device_id *id)
 940 {
 941         struct usb_device *udev;
 942         struct vnt_private *priv;
 943         struct ieee80211_hw *hw;
 944         struct wiphy *wiphy;
 945         int rc = 0;
 946
 947         udev = usb_get_dev(interface_to_usbdev(intf));
 948
 949         dev_notice(&udev->dev, "%s Ver. %s\n",
 950                                         DEVICE_FULL_DRV_NAM, DEVICE_VERSION);
 951         dev_notice(&udev->dev,
 952                 "Copyright (c) 2004 VIA Networking Technologies, Inc.\n");
 953
 954         hw = ieee80211_alloc_hw(sizeof(struct vnt_private), &vnt_mac_ops);
 955         if (!hw) {
 956                 dev_err(&udev->dev, "could not register ieee80211_hw\n");
 957                 rc = -ENOMEM;
 958                 goto err_nomem;
 959         }
 960
 961         priv = hw->priv;
 962         priv->hw = hw;
 963         priv->usb = udev;
 964
 965         vnt_set_options(priv);
 966
 967         spin_lock_init(&priv->lock);
 968         mutex_init(&priv->usb_lock);
 969
 970         INIT_DELAYED_WORK(&priv->run_command_work, vnt_run_command);
 971
 972         usb_set_intfdata(intf, priv);
 973
 974         wiphy = priv->hw->wiphy;
 975
 976         wiphy->frag_threshold = FRAG_THRESH_DEF;
 977         wiphy->rts_threshold = RTS_THRESH_DEF;
 978         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
 979                 BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP);
 980
 981         ieee80211_hw_set(priv->hw, TIMING_BEACON_ONLY);
 982         ieee80211_hw_set(priv->hw, SIGNAL_DBM);
 983         ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
 984         ieee80211_hw_set(priv->hw, REPORTS_TX_ACK_STATUS);
 985
 986         priv->hw->max_signal = 100;
 987
 988         SET_IEEE80211_DEV(priv->hw, &intf->dev);
 989
 990         usb_device_reset(priv);
 991
 992         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
 993         vnt_reset_command_timer(priv);
 994
 995         vnt_schedule_command(priv, WLAN_CMD_INIT_MAC80211);
 996
 997         return 0;
 998
 999 err_nomem:
1000         usb_put_dev(udev);
1001
1002         return rc;
1003 }
1004
1005 static void vt6656_disconnect(struct usb_interface *intf)
1006 {
1007         struct vnt_private *priv = usb_get_intfdata(intf);
1008
1009         if (!priv)
1010                 return;
1011
1012         if (priv->mac_hw)
1013                 ieee80211_unregister_hw(priv->hw);
1014
1015         usb_set_intfdata(intf, NULL);
1016         usb_put_dev(interface_to_usbdev(intf));
1017
1018         set_bit(DEVICE_FLAGS_UNPLUG, &priv->flags);
1019
1020         ieee80211_free_hw(priv->hw);
1021 }
1022
1023 #ifdef CONFIG_PM
1024
1025 static int vt6656_suspend(struct usb_interface *intf, pm_message_t message)
1026 {
1027         return 0;
1028 }
1029
1030 static int vt6656_resume(struct usb_interface *intf)
1031 {
1032         return 0;
1033 }
1034
1035 #endif /* CONFIG_PM */
1036
1037 MODULE_DEVICE_TABLE(usb, vt6656_table);
1038
1039 static struct usb_driver vt6656_driver = {
1040         .name =         DEVICE_NAME,
1041         .probe =        vt6656_probe,
1042         .disconnect =   vt6656_disconnect,
1043         .id_table =     vt6656_table,
1044 #ifdef CONFIG_PM
1045         .suspend = vt6656_suspend,
1046         .resume = vt6656_resume,
1047 #endif /* CONFIG_PM */
1048 };
1049
1050 module_usb_driver(vt6656_driver);