drivers/staging/vt6655/device_main.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  * File: device_main.c
  16  *
  17  * Purpose: driver entry for initial, open, close, tx and rx.
  18  *
  19  * Author: Lyndon Chen
  20  *
  21  * Date: Jan 8, 2003
  22  *
  23  * Functions:
  24  *
  25  *   vt6655_probe - module initial (insmod) driver entry
  26  *   vt6655_remove - module remove entry
  27  *   device_free_info - device structure resource free function
  28  *   device_print_info - print out resource
  29  *   device_rx_srv - rx service function
  30  *   device_alloc_rx_buf - rx buffer pre-allocated function
  31  *   device_free_tx_buf - free tx buffer function
  32  *   device_init_rd0_ring- initial rd dma0 ring
  33  *   device_init_rd1_ring- initial rd dma1 ring
  34  *   device_init_td0_ring- initial tx dma0 ring buffer
  35  *   device_init_td1_ring- initial tx dma1 ring buffer
  36  *   device_init_registers- initial MAC & BBP & RF internal registers.
  37  *   device_init_rings- initial tx/rx ring buffer
  38  *   device_free_rings- free all allocated ring buffer
  39  *   device_tx_srv- tx interrupt service function
  40  *
  41  * Revision History:
  42  */
  43 #undef __NO_VERSION__
  44
  45 #include <linux/file.h>
  46 #include "device.h"
  47 #include "card.h"
  48 #include "channel.h"
  49 #include "baseband.h"
  50 #include "mac.h"
  51 #include "power.h"
  52 #include "rxtx.h"
  53 #include "dpc.h"
  54 #include "rf.h"
  55 #include <linux/delay.h>
  56 #include <linux/kthread.h>
  57 #include <linux/slab.h>
  58
  59 /*---------------------  Static Definitions -------------------------*/
  60 /*
  61  * Define module options
  62  */
  63 MODULE_AUTHOR("VIA Networking Technologies, Inc., <lyndonchen@vntek.com.tw>");
  64 MODULE_LICENSE("GPL");
  65 MODULE_DESCRIPTION("VIA Networking Solomon-A/B/G Wireless LAN Adapter Driver");
  66
  67 #define DEVICE_PARAM(N, D)
  68
  69 #define RX_DESC_MIN0     16
  70 #define RX_DESC_MAX0     128
  71 #define RX_DESC_DEF0     32
  72 DEVICE_PARAM(RxDescriptors0, "Number of receive descriptors0");
  73
  74 #define RX_DESC_MIN1     16
  75 #define RX_DESC_MAX1     128
  76 #define RX_DESC_DEF1     32
  77 DEVICE_PARAM(RxDescriptors1, "Number of receive descriptors1");
  78
  79 #define TX_DESC_MIN0     16
  80 #define TX_DESC_MAX0     128
  81 #define TX_DESC_DEF0     32
  82 DEVICE_PARAM(TxDescriptors0, "Number of transmit descriptors0");
  83
  84 #define TX_DESC_MIN1     16
  85 #define TX_DESC_MAX1     128
  86 #define TX_DESC_DEF1     64
  87 DEVICE_PARAM(TxDescriptors1, "Number of transmit descriptors1");
  88
  89 #define INT_WORKS_DEF   20
  90 #define INT_WORKS_MIN   10
  91 #define INT_WORKS_MAX   64
  92
  93 DEVICE_PARAM(int_works, "Number of packets per interrupt services");
  94
  95 #define RTS_THRESH_DEF     2347
  96
  97 #define FRAG_THRESH_DEF     2346
  98
  99 #define SHORT_RETRY_MIN     0
 100 #define SHORT_RETRY_MAX     31
 101 #define SHORT_RETRY_DEF     8
 102
 103 DEVICE_PARAM(ShortRetryLimit, "Short frame retry limits");
 104
 105 #define LONG_RETRY_MIN     0
 106 #define LONG_RETRY_MAX     15
 107 #define LONG_RETRY_DEF     4
 108
 109 DEVICE_PARAM(LongRetryLimit, "long frame retry limits");
 110
 111 /* BasebandType[] baseband type selected
 112  * 0: indicate 802.11a type
 113  * 1: indicate 802.11b type
 114  * 2: indicate 802.11g type
 115  */
 116 #define BBP_TYPE_MIN     0
 117 #define BBP_TYPE_MAX     2
 118 #define BBP_TYPE_DEF     2
 119
 120 DEVICE_PARAM(BasebandType, "baseband type");
 121
 122 /*
 123  * Static vars definitions
 124  */
 125 static const struct pci_device_id vt6655_pci_id_table[] = {
 126         { PCI_VDEVICE(VIA, 0x3253) },
 127         { 0, }
 128 };
 129
 130 /*---------------------  Static Functions  --------------------------*/
 131
 132 static int  vt6655_probe(struct pci_dev *pcid, const struct pci_device_id *ent);
 133 static void device_free_info(struct vnt_private *priv);
 134 static void device_print_info(struct vnt_private *priv);
 135
 136 static void device_init_rd0_ring(struct vnt_private *priv);
 137 static void device_init_rd1_ring(struct vnt_private *priv);
 138 static void device_init_td0_ring(struct vnt_private *priv);
 139 static void device_init_td1_ring(struct vnt_private *priv);
 140
 141 static int  device_rx_srv(struct vnt_private *priv, unsigned int idx);
 142 static int  device_tx_srv(struct vnt_private *priv, unsigned int idx);
 143 static bool device_alloc_rx_buf(struct vnt_private *, struct vnt_rx_desc *);
 144 static void device_init_registers(struct vnt_private *priv);
 145 static void device_free_tx_buf(struct vnt_private *, struct vnt_tx_desc *);
 146 static void device_free_td0_ring(struct vnt_private *priv);
 147 static void device_free_td1_ring(struct vnt_private *priv);
 148 static void device_free_rd0_ring(struct vnt_private *priv);
 149 static void device_free_rd1_ring(struct vnt_private *priv);
 150 static void device_free_rings(struct vnt_private *priv);
 151
 152 /*---------------------  Export Variables  --------------------------*/
 153
 154 /*---------------------  Export Functions  --------------------------*/
 155
 156 static void vt6655_remove(struct pci_dev *pcid)
 157 {
 158         struct vnt_private *priv = pci_get_drvdata(pcid);
 159
 160         if (!priv)
 161                 return;
 162         device_free_info(priv);
 163 }
 164
 165 static void device_get_options(struct vnt_private *priv)
 166 {
 167         struct vnt_options *opts = &priv->opts;
 168
 169         opts->rx_descs0 = RX_DESC_DEF0;
 170         opts->rx_descs1 = RX_DESC_DEF1;
 171         opts->tx_descs[0] = TX_DESC_DEF0;
 172         opts->tx_descs[1] = TX_DESC_DEF1;
 173         opts->int_works = INT_WORKS_DEF;
 174
 175         opts->short_retry = SHORT_RETRY_DEF;
 176         opts->long_retry = LONG_RETRY_DEF;
 177         opts->bbp_type = BBP_TYPE_DEF;
 178 }
 179
 180 static void
 181 device_set_options(struct vnt_private *priv)
 182 {
 183         priv->byShortRetryLimit = priv->opts.short_retry;
 184         priv->byLongRetryLimit = priv->opts.long_retry;
 185         priv->byBBType = priv->opts.bbp_type;
 186         priv->byPacketType = priv->byBBType;
 187         priv->byAutoFBCtrl = AUTO_FB_0;
 188         priv->bUpdateBBVGA = true;
 189         priv->byPreambleType = 0;
 190
 191         pr_debug(" byShortRetryLimit= %d\n", (int)priv->byShortRetryLimit);
 192         pr_debug(" byLongRetryLimit= %d\n", (int)priv->byLongRetryLimit);
 193         pr_debug(" byPreambleType= %d\n", (int)priv->byPreambleType);
 194         pr_debug(" byShortPreamble= %d\n", (int)priv->byShortPreamble);
 195         pr_debug(" byBBType= %d\n", (int)priv->byBBType);
 196 }
 197
 198 /*
 199  * Initialisation of MAC & BBP registers
 200  */
 201
 202 static void device_init_registers(struct vnt_private *priv)
 203 {
 204         unsigned long flags;
 205         unsigned int ii;
 206         unsigned char byValue;
 207         unsigned char byCCKPwrdBm = 0;
 208         unsigned char byOFDMPwrdBm = 0;
 209
 210         MACbShutdown(priv);
 211         BBvSoftwareReset(priv);
 212
 213         /* Do MACbSoftwareReset in MACvInitialize */
 214         MACbSoftwareReset(priv);
 215
 216         priv->bAES = false;
 217
 218         /* Only used in 11g type, sync with ERP IE */
 219         priv->bProtectMode = false;
 220
 221         priv->bNonERPPresent = false;
 222         priv->bBarkerPreambleMd = false;
 223         priv->wCurrentRate = RATE_1M;
 224         priv->byTopOFDMBasicRate = RATE_24M;
 225         priv->byTopCCKBasicRate = RATE_1M;
 226
 227         /* init MAC */
 228         MACvInitialize(priv);
 229
 230         /* Get Local ID */
 231         VNSvInPortB(priv->PortOffset + MAC_REG_LOCALID, &priv->byLocalID);
 232
 233         spin_lock_irqsave(&priv->lock, flags);
 234
 235         SROMvReadAllContents(priv->PortOffset, priv->abyEEPROM);
 236
 237         spin_unlock_irqrestore(&priv->lock, flags);
 238
 239         /* Get Channel range */
 240         priv->byMinChannel = 1;
 241         priv->byMaxChannel = CB_MAX_CHANNEL;
 242
 243         /* Get Antena */
 244         byValue = SROMbyReadEmbedded(priv->PortOffset, EEP_OFS_ANTENNA);
 245         if (byValue & EEP_ANTINV)
 246                 priv->bTxRxAntInv = true;
 247         else
 248                 priv->bTxRxAntInv = false;
 249
 250         byValue &= (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
 251         /* if not set default is All */
 252         if (byValue == 0)
 253                 byValue = (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
 254
 255         if (byValue == (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN)) {
 256                 priv->byAntennaCount = 2;
 257                 priv->byTxAntennaMode = ANT_B;
 258                 priv->dwTxAntennaSel = 1;
 259                 priv->dwRxAntennaSel = 1;
 260
 261                 if (priv->bTxRxAntInv)
 262                         priv->byRxAntennaMode = ANT_A;
 263                 else
 264                         priv->byRxAntennaMode = ANT_B;
 265         } else  {
 266                 priv->byAntennaCount = 1;
 267                 priv->dwTxAntennaSel = 0;
 268                 priv->dwRxAntennaSel = 0;
 269
 270                 if (byValue & EEP_ANTENNA_AUX) {
 271                         priv->byTxAntennaMode = ANT_A;
 272
 273                         if (priv->bTxRxAntInv)
 274                                 priv->byRxAntennaMode = ANT_B;
 275                         else
 276                                 priv->byRxAntennaMode = ANT_A;
 277                 } else {
 278                         priv->byTxAntennaMode = ANT_B;
 279
 280                         if (priv->bTxRxAntInv)
 281                                 priv->byRxAntennaMode = ANT_A;
 282                         else
 283                                 priv->byRxAntennaMode = ANT_B;
 284                 }
 285         }
 286
 287         /* Set initial antenna mode */
 288         BBvSetTxAntennaMode(priv, priv->byTxAntennaMode);
 289         BBvSetRxAntennaMode(priv, priv->byRxAntennaMode);
 290
 291         /* zonetype initial */
 292         priv->byOriginalZonetype = priv->abyEEPROM[EEP_OFS_ZONETYPE];
 293
 294         if (!priv->bZoneRegExist)
 295                 priv->byZoneType = priv->abyEEPROM[EEP_OFS_ZONETYPE];
 296
 297         pr_debug("priv->byZoneType = %x\n", priv->byZoneType);
 298
 299         /* Init RF module */
 300         RFbInit(priv);
 301
 302         /* Get Desire Power Value */
 303         priv->byCurPwr = 0xFF;
 304         priv->byCCKPwr = SROMbyReadEmbedded(priv->PortOffset, EEP_OFS_PWR_CCK);
 305         priv->byOFDMPwrG = SROMbyReadEmbedded(priv->PortOffset, EEP_OFS_PWR_OFDMG);
 306
 307         /* Load power Table */
 308         for (ii = 0; ii < CB_MAX_CHANNEL_24G; ii++) {
 309                 priv->abyCCKPwrTbl[ii + 1] =
 310                         SROMbyReadEmbedded(priv->PortOffset,
 311                                            (unsigned char)(ii + EEP_OFS_CCK_PWR_TBL));
 312                 if (priv->abyCCKPwrTbl[ii + 1] == 0)
 313                         priv->abyCCKPwrTbl[ii + 1] = priv->byCCKPwr;
 314
 315                 priv->abyOFDMPwrTbl[ii + 1] =
 316                         SROMbyReadEmbedded(priv->PortOffset,
 317                                            (unsigned char)(ii + EEP_OFS_OFDM_PWR_TBL));
 318                 if (priv->abyOFDMPwrTbl[ii + 1] == 0)
 319                         priv->abyOFDMPwrTbl[ii + 1] = priv->byOFDMPwrG;
 320
 321                 priv->abyCCKDefaultPwr[ii + 1] = byCCKPwrdBm;
 322                 priv->abyOFDMDefaultPwr[ii + 1] = byOFDMPwrdBm;
 323         }
 324
 325         /* recover 12,13 ,14channel for EUROPE by 11 channel */
 326         for (ii = 11; ii < 14; ii++) {
 327                 priv->abyCCKPwrTbl[ii] = priv->abyCCKPwrTbl[10];
 328                 priv->abyOFDMPwrTbl[ii] = priv->abyOFDMPwrTbl[10];
 329         }
 330
 331         /* Load OFDM A Power Table */
 332         for (ii = 0; ii < CB_MAX_CHANNEL_5G; ii++) {
 333                 priv->abyOFDMPwrTbl[ii + CB_MAX_CHANNEL_24G + 1] =
 334                         SROMbyReadEmbedded(priv->PortOffset,
 335                                            (unsigned char)(ii + EEP_OFS_OFDMA_PWR_TBL));
 336
 337                 priv->abyOFDMDefaultPwr[ii + CB_MAX_CHANNEL_24G + 1] =
 338                         SROMbyReadEmbedded(priv->PortOffset,
 339                                            (unsigned char)(ii + EEP_OFS_OFDMA_PWR_dBm));
 340         }
 341
 342         if (priv->byLocalID > REV_ID_VT3253_B1) {
 343                 MACvSelectPage1(priv->PortOffset);
 344
 345                 VNSvOutPortB(priv->PortOffset + MAC_REG_MSRCTL + 1,
 346                              (MSRCTL1_TXPWR | MSRCTL1_CSAPAREN));
 347
 348                 MACvSelectPage0(priv->PortOffset);
 349         }
 350
 351         /* use relative tx timeout and 802.11i D4 */
 352         MACvWordRegBitsOn(priv->PortOffset,
 353                           MAC_REG_CFG, (CFG_TKIPOPT | CFG_NOTXTIMEOUT));
 354
 355         /* set performance parameter by registry */
 356         MACvSetShortRetryLimit(priv, priv->byShortRetryLimit);
 357         MACvSetLongRetryLimit(priv, priv->byLongRetryLimit);
 358
 359         /* reset TSF counter */
 360         VNSvOutPortB(priv->PortOffset + MAC_REG_TFTCTL, TFTCTL_TSFCNTRST);
 361         /* enable TSF counter */
 362         VNSvOutPortB(priv->PortOffset + MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
 363
 364         /* initialize BBP registers */
 365         BBbVT3253Init(priv);
 366
 367         if (priv->bUpdateBBVGA) {
 368                 priv->byBBVGACurrent = priv->abyBBVGA[0];
 369                 priv->byBBVGANew = priv->byBBVGACurrent;
 370                 BBvSetVGAGainOffset(priv, priv->abyBBVGA[0]);
 371         }
 372
 373         BBvSetRxAntennaMode(priv, priv->byRxAntennaMode);
 374         BBvSetTxAntennaMode(priv, priv->byTxAntennaMode);
 375
 376         /* Set BB and packet type at the same time. */
 377         /* Set Short Slot Time, xIFS, and RSPINF. */
 378         priv->wCurrentRate = RATE_54M;
 379
 380         priv->bRadioOff = false;
 381
 382         priv->byRadioCtl = SROMbyReadEmbedded(priv->PortOffset,
 383                                                  EEP_OFS_RADIOCTL);
 384         priv->bHWRadioOff = false;
 385
 386         if (priv->byRadioCtl & EEP_RADIOCTL_ENABLE) {
 387                 /* Get GPIO */
 388                 MACvGPIOIn(priv->PortOffset, &priv->byGPIO);
 389
 390                 if (((priv->byGPIO & GPIO0_DATA) &&
 391                      !(priv->byRadioCtl & EEP_RADIOCTL_INV)) ||
 392                      (!(priv->byGPIO & GPIO0_DATA) &&
 393                      (priv->byRadioCtl & EEP_RADIOCTL_INV)))
 394                         priv->bHWRadioOff = true;
 395         }
 396
 397         if (priv->bHWRadioOff || priv->bRadioControlOff)
 398                 CARDbRadioPowerOff(priv);
 399
 400         /* get Permanent network address */
 401         SROMvReadEtherAddress(priv->PortOffset, priv->abyCurrentNetAddr);
 402         pr_debug("Network address = %pM\n", priv->abyCurrentNetAddr);
 403
 404         /* reset Tx pointer */
 405         CARDvSafeResetRx(priv);
 406         /* reset Rx pointer */
 407         CARDvSafeResetTx(priv);
 408
 409         if (priv->byLocalID <= REV_ID_VT3253_A1)
 410                 MACvRegBitsOn(priv->PortOffset, MAC_REG_RCR, RCR_WPAERR);
 411
 412         /* Turn On Rx DMA */
 413         MACvReceive0(priv->PortOffset);
 414         MACvReceive1(priv->PortOffset);
 415
 416         /* start the adapter */
 417         MACvStart(priv->PortOffset);
 418 }
 419
 420 static void device_print_info(struct vnt_private *priv)
 421 {
 422         dev_info(&priv->pcid->dev, "MAC=%pM IO=0x%lx Mem=0x%lx IRQ=%d\n",
 423                  priv->abyCurrentNetAddr, (unsigned long)priv->ioaddr,
 424                  (unsigned long)priv->PortOffset, priv->pcid->irq);
 425 }
 426
 427 static void device_free_info(struct vnt_private *priv)
 428 {
 429         if (!priv)
 430                 return;
 431
 432         if (priv->mac_hw)
 433                 ieee80211_unregister_hw(priv->hw);
 434
 435         if (priv->PortOffset)
 436                 iounmap(priv->PortOffset);
 437
 438         if (priv->pcid)
 439                 pci_release_regions(priv->pcid);
 440
 441         if (priv->hw)
 442                 ieee80211_free_hw(priv->hw);
 443 }
 444
 445 static bool device_init_rings(struct vnt_private *priv)
 446 {
 447         void *vir_pool;
 448
 449         /*allocate all RD/TD rings a single pool*/
 450         vir_pool = dma_zalloc_coherent(&priv->pcid->dev,
 451                                        priv->opts.rx_descs0 * sizeof(struct vnt_rx_desc) +
 452                                        priv->opts.rx_descs1 * sizeof(struct vnt_rx_desc) +
 453                                        priv->opts.tx_descs[0] * sizeof(struct vnt_tx_desc) +
 454                                        priv->opts.tx_descs[1] * sizeof(struct vnt_tx_desc),
 455                                        &priv->pool_dma, GFP_ATOMIC);
 456         if (!vir_pool) {
 457                 dev_err(&priv->pcid->dev, "allocate desc dma memory failed\n");
 458                 return false;
 459         }
 460
 461         priv->aRD0Ring = vir_pool;
 462         priv->aRD1Ring = vir_pool +
 463                 priv->opts.rx_descs0 * sizeof(struct vnt_rx_desc);
 464
 465         priv->rd0_pool_dma = priv->pool_dma;
 466         priv->rd1_pool_dma = priv->rd0_pool_dma +
 467                 priv->opts.rx_descs0 * sizeof(struct vnt_rx_desc);
 468
 469         priv->tx0_bufs = dma_zalloc_coherent(&priv->pcid->dev,
 470                                              priv->opts.tx_descs[0] * PKT_BUF_SZ +
 471                                              priv->opts.tx_descs[1] * PKT_BUF_SZ +
 472                                              CB_BEACON_BUF_SIZE +
 473                                              CB_MAX_BUF_SIZE,
 474                                              &priv->tx_bufs_dma0,
 475                                              GFP_ATOMIC);
 476         if (!priv->tx0_bufs) {
 477                 dev_err(&priv->pcid->dev, "allocate buf dma memory failed\n");
 478
 479                 dma_free_coherent(&priv->pcid->dev,
 480                                   priv->opts.rx_descs0 * sizeof(struct vnt_rx_desc) +
 481                                   priv->opts.rx_descs1 * sizeof(struct vnt_rx_desc) +
 482                                   priv->opts.tx_descs[0] * sizeof(struct vnt_tx_desc) +
 483                                   priv->opts.tx_descs[1] * sizeof(struct vnt_tx_desc),
 484                                   vir_pool, priv->pool_dma);
 485                 return false;
 486         }
 487
 488         priv->td0_pool_dma = priv->rd1_pool_dma +
 489                 priv->opts.rx_descs1 * sizeof(struct vnt_rx_desc);
 490
 491         priv->td1_pool_dma = priv->td0_pool_dma +
 492                 priv->opts.tx_descs[0] * sizeof(struct vnt_tx_desc);
 493
 494         /* vir_pool: pvoid type */
 495         priv->apTD0Rings = vir_pool
 496                 + priv->opts.rx_descs0 * sizeof(struct vnt_rx_desc)
 497                 + priv->opts.rx_descs1 * sizeof(struct vnt_rx_desc);
 498
 499         priv->apTD1Rings = vir_pool
 500                 + priv->opts.rx_descs0 * sizeof(struct vnt_rx_desc)
 501                 + priv->opts.rx_descs1 * sizeof(struct vnt_rx_desc)
 502                 + priv->opts.tx_descs[0] * sizeof(struct vnt_tx_desc);
 503
 504         priv->tx1_bufs = priv->tx0_bufs +
 505                 priv->opts.tx_descs[0] * PKT_BUF_SZ;
 506
 507         priv->tx_beacon_bufs = priv->tx1_bufs +
 508                 priv->opts.tx_descs[1] * PKT_BUF_SZ;
 509
 510         priv->pbyTmpBuff = priv->tx_beacon_bufs +
 511                 CB_BEACON_BUF_SIZE;
 512
 513         priv->tx_bufs_dma1 = priv->tx_bufs_dma0 +
 514                 priv->opts.tx_descs[0] * PKT_BUF_SZ;
 515
 516         priv->tx_beacon_dma = priv->tx_bufs_dma1 +
 517                 priv->opts.tx_descs[1] * PKT_BUF_SZ;
 518
 519         return true;
 520 }
 521
 522 static void device_free_rings(struct vnt_private *priv)
 523 {
 524         dma_free_coherent(&priv->pcid->dev,
 525                           priv->opts.rx_descs0 * sizeof(struct vnt_rx_desc) +
 526                           priv->opts.rx_descs1 * sizeof(struct vnt_rx_desc) +
 527                           priv->opts.tx_descs[0] * sizeof(struct vnt_tx_desc) +
 528                           priv->opts.tx_descs[1] * sizeof(struct vnt_tx_desc),
 529                           priv->aRD0Ring, priv->pool_dma);
 530
 531         if (priv->tx0_bufs)
 532                 dma_free_coherent(&priv->pcid->dev,
 533                                   priv->opts.tx_descs[0] * PKT_BUF_SZ +
 534                                   priv->opts.tx_descs[1] * PKT_BUF_SZ +
 535                                   CB_BEACON_BUF_SIZE +
 536                                   CB_MAX_BUF_SIZE,
 537                                   priv->tx0_bufs, priv->tx_bufs_dma0);
 538 }
 539
 540 static void device_init_rd0_ring(struct vnt_private *priv)
 541 {
 542         int i;
 543         dma_addr_t      curr = priv->rd0_pool_dma;
 544         struct vnt_rx_desc *desc;
 545
 546         /* Init the RD0 ring entries */
 547         for (i = 0; i < priv->opts.rx_descs0;
 548              i ++, curr += sizeof(struct vnt_rx_desc)) {
 549                 desc = &priv->aRD0Ring[i];
 550                 desc->rd_info = kzalloc(sizeof(*desc->rd_info), GFP_ATOMIC);
 551
 552                 if (!device_alloc_rx_buf(priv, desc))
 553                         dev_err(&priv->pcid->dev, "can not alloc rx bufs\n");
 554
 555                 desc->next = &(priv->aRD0Ring[(i + 1) % priv->opts.rx_descs0]);
 556                 desc->next_desc = cpu_to_le32(curr + sizeof(struct vnt_rx_desc));
 557         }
 558
 559         if (i > 0)
 560                 priv->aRD0Ring[i-1].next_desc = cpu_to_le32(priv->rd0_pool_dma);
 561         priv->pCurrRD[0] = &priv->aRD0Ring[0];
 562 }
 563
 564 static void device_init_rd1_ring(struct vnt_private *priv)
 565 {
 566         int i;
 567         dma_addr_t      curr = priv->rd1_pool_dma;
 568         struct vnt_rx_desc *desc;
 569
 570         /* Init the RD1 ring entries */
 571         for (i = 0; i < priv->opts.rx_descs1;
 572              i ++, curr += sizeof(struct vnt_rx_desc)) {
 573                 desc = &priv->aRD1Ring[i];
 574                 desc->rd_info = kzalloc(sizeof(*desc->rd_info), GFP_ATOMIC);
 575
 576                 if (!device_alloc_rx_buf(priv, desc))
 577                         dev_err(&priv->pcid->dev, "can not alloc rx bufs\n");
 578
 579                 desc->next = &(priv->aRD1Ring[(i+1) % priv->opts.rx_descs1]);
 580                 desc->next_desc = cpu_to_le32(curr + sizeof(struct vnt_rx_desc));
 581         }
 582
 583         if (i > 0)
 584                 priv->aRD1Ring[i-1].next_desc = cpu_to_le32(priv->rd1_pool_dma);
 585         priv->pCurrRD[1] = &priv->aRD1Ring[0];
 586 }
 587
 588 static void device_free_rd0_ring(struct vnt_private *priv)
 589 {
 590         int i;
 591
 592         for (i = 0; i < priv->opts.rx_descs0; i++) {
 593                 struct vnt_rx_desc *desc = &(priv->aRD0Ring[i]);
 594                 struct vnt_rd_info *rd_info = desc->rd_info;
 595
 596                 dma_unmap_single(&priv->pcid->dev, rd_info->skb_dma,
 597                                  priv->rx_buf_sz, DMA_FROM_DEVICE);
 598
 599                 dev_kfree_skb(rd_info->skb);
 600
 601                 kfree(desc->rd_info);
 602         }
 603 }
 604
 605 static void device_free_rd1_ring(struct vnt_private *priv)
 606 {
 607         int i;
 608
 609         for (i = 0; i < priv->opts.rx_descs1; i++) {
 610                 struct vnt_rx_desc *desc = &priv->aRD1Ring[i];
 611                 struct vnt_rd_info *rd_info = desc->rd_info;
 612
 613                 dma_unmap_single(&priv->pcid->dev, rd_info->skb_dma,
 614                                  priv->rx_buf_sz, DMA_FROM_DEVICE);
 615
 616                 dev_kfree_skb(rd_info->skb);
 617
 618                 kfree(desc->rd_info);
 619         }
 620 }
 621
 622 static void device_init_td0_ring(struct vnt_private *priv)
 623 {
 624         int i;
 625         dma_addr_t  curr;
 626         struct vnt_tx_desc *desc;
 627
 628         curr = priv->td0_pool_dma;
 629         for (i = 0; i < priv->opts.tx_descs[0];
 630              i++, curr += sizeof(struct vnt_tx_desc)) {
 631                 desc = &priv->apTD0Rings[i];
 632                 desc->td_info = kzalloc(sizeof(*desc->td_info), GFP_ATOMIC);
 633
 634                 desc->td_info->buf = priv->tx0_bufs + i * PKT_BUF_SZ;
 635                 desc->td_info->buf_dma = priv->tx_bufs_dma0 + i * PKT_BUF_SZ;
 636
 637                 desc->next = &(priv->apTD0Rings[(i+1) % priv->opts.tx_descs[0]]);
 638                 desc->next_desc = cpu_to_le32(curr + sizeof(struct vnt_tx_desc));
 639         }
 640
 641         if (i > 0)
 642                 priv->apTD0Rings[i-1].next_desc = cpu_to_le32(priv->td0_pool_dma);
 643         priv->apTailTD[0] = priv->apCurrTD[0] = &priv->apTD0Rings[0];
 644 }
 645
 646 static void device_init_td1_ring(struct vnt_private *priv)
 647 {
 648         int i;
 649         dma_addr_t  curr;
 650         struct vnt_tx_desc *desc;
 651
 652         /* Init the TD ring entries */
 653         curr = priv->td1_pool_dma;
 654         for (i = 0; i < priv->opts.tx_descs[1];
 655              i++, curr += sizeof(struct vnt_tx_desc)) {
 656                 desc = &priv->apTD1Rings[i];
 657                 desc->td_info = kzalloc(sizeof(*desc->td_info), GFP_ATOMIC);
 658
 659                 desc->td_info->buf = priv->tx1_bufs + i * PKT_BUF_SZ;
 660                 desc->td_info->buf_dma = priv->tx_bufs_dma1 + i * PKT_BUF_SZ;
 661
 662                 desc->next = &(priv->apTD1Rings[(i + 1) % priv->opts.tx_descs[1]]);
 663                 desc->next_desc = cpu_to_le32(curr + sizeof(struct vnt_tx_desc));
 664         }
 665
 666         if (i > 0)
 667                 priv->apTD1Rings[i-1].next_desc = cpu_to_le32(priv->td1_pool_dma);
 668         priv->apTailTD[1] = priv->apCurrTD[1] = &priv->apTD1Rings[0];
 669 }
 670
 671 static void device_free_td0_ring(struct vnt_private *priv)
 672 {
 673         int i;
 674
 675         for (i = 0; i < priv->opts.tx_descs[0]; i++) {
 676                 struct vnt_tx_desc *desc = &priv->apTD0Rings[i];
 677                 struct vnt_td_info *td_info = desc->td_info;
 678
 679                 dev_kfree_skb(td_info->skb);
 680                 kfree(desc->td_info);
 681         }
 682 }
 683
 684 static void device_free_td1_ring(struct vnt_private *priv)
 685 {
 686         int i;
 687
 688         for (i = 0; i < priv->opts.tx_descs[1]; i++) {
 689                 struct vnt_tx_desc *desc = &priv->apTD1Rings[i];
 690                 struct vnt_td_info *td_info = desc->td_info;
 691
 692                 dev_kfree_skb(td_info->skb);
 693                 kfree(desc->td_info);
 694         }
 695 }
 696
 697 /*-----------------------------------------------------------------*/
 698
 699 static int device_rx_srv(struct vnt_private *priv, unsigned int idx)
 700 {
 701         struct vnt_rx_desc *rd;
 702         int works = 0;
 703
 704         for (rd = priv->pCurrRD[idx];
 705              rd->rd0.owner == OWNED_BY_HOST;
 706              rd = rd->next) {
 707                 if (works++ > 15)
 708                         break;
 709
 710                 if (!rd->rd_info->skb)
 711                         break;
 712
 713                 if (vnt_receive_frame(priv, rd)) {
 714                         if (!device_alloc_rx_buf(priv, rd)) {
 715                                 dev_err(&priv->pcid->dev,
 716                                         "can not allocate rx buf\n");
 717                                 break;
 718                         }
 719                 }
 720                 rd->rd0.owner = OWNED_BY_NIC;
 721         }
 722
 723         priv->pCurrRD[idx] = rd;
 724
 725         return works;
 726 }
 727
 728 static bool device_alloc_rx_buf(struct vnt_private *priv,
 729                                 struct vnt_rx_desc *rd)
 730 {
 731         struct vnt_rd_info *rd_info = rd->rd_info;
 732
 733         rd_info->skb = dev_alloc_skb((int)priv->rx_buf_sz);
 734         if (!rd_info->skb)
 735                 return false;
 736
 737         rd_info->skb_dma =
 738                 dma_map_single(&priv->pcid->dev,
 739                                skb_put(rd_info->skb, skb_tailroom(rd_info->skb)),
 740                                priv->rx_buf_sz, DMA_FROM_DEVICE);
 741         if (dma_mapping_error(&priv->pcid->dev, rd_info->skb_dma)) {
 742                 dev_kfree_skb(rd_info->skb);
 743                 rd_info->skb = NULL;
 744                 return false;
 745         }
 746
 747         *((unsigned int *)&rd->rd0) = 0; /* FIX cast */
 748
 749         rd->rd0.res_count = cpu_to_le16(priv->rx_buf_sz);
 750         rd->rd0.owner = OWNED_BY_NIC;
 751         rd->rd1.req_count = cpu_to_le16(priv->rx_buf_sz);
 752         rd->buff_addr = cpu_to_le32(rd_info->skb_dma);
 753
 754         return true;
 755 }
 756
 757 static const u8 fallback_rate0[5][5] = {
 758         {RATE_18M, RATE_18M, RATE_12M, RATE_12M, RATE_12M},
 759         {RATE_24M, RATE_24M, RATE_18M, RATE_12M, RATE_12M},
 760         {RATE_36M, RATE_36M, RATE_24M, RATE_18M, RATE_18M},
 761         {RATE_48M, RATE_48M, RATE_36M, RATE_24M, RATE_24M},
 762         {RATE_54M, RATE_54M, RATE_48M, RATE_36M, RATE_36M}
 763 };
 764
 765 static const u8 fallback_rate1[5][5] = {
 766         {RATE_18M, RATE_18M, RATE_12M, RATE_6M, RATE_6M},
 767         {RATE_24M, RATE_24M, RATE_18M, RATE_6M, RATE_6M},
 768         {RATE_36M, RATE_36M, RATE_24M, RATE_12M, RATE_12M},
 769         {RATE_48M, RATE_48M, RATE_24M, RATE_12M, RATE_12M},
 770         {RATE_54M, RATE_54M, RATE_36M, RATE_18M, RATE_18M}
 771 };
 772
 773 static int vnt_int_report_rate(struct vnt_private *priv,
 774                                struct vnt_td_info *context, u8 tsr0, u8 tsr1)
 775 {
 776         struct vnt_tx_fifo_head *fifo_head;
 777         struct ieee80211_tx_info *info;
 778         struct ieee80211_rate *rate;
 779         u16 fb_option;
 780         u8 tx_retry = (tsr0 & TSR0_NCR);
 781         s8 idx;
 782
 783         if (!context)
 784                 return -ENOMEM;
 785
 786         if (!context->skb)
 787                 return -EINVAL;
 788
 789         fifo_head = (struct vnt_tx_fifo_head *)context->buf;
 790         fb_option = (le16_to_cpu(fifo_head->fifo_ctl) &
 791                         (FIFOCTL_AUTO_FB_0 | FIFOCTL_AUTO_FB_1));
 792
 793         info = IEEE80211_SKB_CB(context->skb);
 794         idx = info->control.rates[0].idx;
 795
 796         if (fb_option && !(tsr1 & TSR1_TERR)) {
 797                 u8 tx_rate;
 798                 u8 retry = tx_retry;
 799
 800                 rate = ieee80211_get_tx_rate(priv->hw, info);
 801                 tx_rate = rate->hw_value - RATE_18M;
 802
 803                 if (retry > 4)
 804                         retry = 4;
 805
 806                 if (fb_option & FIFOCTL_AUTO_FB_0)
 807                         tx_rate = fallback_rate0[tx_rate][retry];
 808                 else if (fb_option & FIFOCTL_AUTO_FB_1)
 809                         tx_rate = fallback_rate1[tx_rate][retry];
 810
 811                 if (info->band == NL80211_BAND_5GHZ)
 812                         idx = tx_rate - RATE_6M;
 813                 else
 814                         idx = tx_rate;
 815         }
 816
 817         ieee80211_tx_info_clear_status(info);
 818
 819         info->status.rates[0].count = tx_retry;
 820
 821         if (!(tsr1 & TSR1_TERR)) {
 822                 info->status.rates[0].idx = idx;
 823
 824                 if (info->flags & IEEE80211_TX_CTL_NO_ACK)
 825                         info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
 826                 else
 827                         info->flags |= IEEE80211_TX_STAT_ACK;
 828         }
 829
 830         return 0;
 831 }
 832
 833 static int device_tx_srv(struct vnt_private *priv, unsigned int idx)
 834 {
 835         struct vnt_tx_desc *desc;
 836         int                      works = 0;
 837         unsigned char byTsr0;
 838         unsigned char byTsr1;
 839
 840         for (desc = priv->apTailTD[idx]; priv->iTDUsed[idx] > 0; desc = desc->next) {
 841                 if (desc->td0.owner == OWNED_BY_NIC)
 842                         break;
 843                 if (works++ > 15)
 844                         break;
 845
 846                 byTsr0 = desc->td0.tsr0;
 847                 byTsr1 = desc->td0.tsr1;
 848
 849                 /* Only the status of first TD in the chain is correct */
 850                 if (desc->td1.tcr & TCR_STP) {
 851                         if ((desc->td_info->flags & TD_FLAGS_NETIF_SKB) != 0) {
 852                                 if (!(byTsr1 & TSR1_TERR)) {
 853                                         if (byTsr0 != 0) {
 854                                                 pr_debug(" Tx[%d] OK but has error. tsr1[%02X] tsr0[%02X]\n",
 855                                                          (int)idx, byTsr1,
 856                                                          byTsr0);
 857                                         }
 858                                 } else {
 859                                         pr_debug(" Tx[%d] dropped & tsr1[%02X] tsr0[%02X]\n",
 860                                                  (int)idx, byTsr1, byTsr0);
 861                                 }
 862                         }
 863
 864                         if (byTsr1 & TSR1_TERR) {
 865                                 if ((desc->td_info->flags & TD_FLAGS_PRIV_SKB) != 0) {
 866                                         pr_debug(" Tx[%d] fail has error. tsr1[%02X] tsr0[%02X]\n",
 867                                                  (int)idx, byTsr1, byTsr0);
 868                                 }
 869                         }
 870
 871                         vnt_int_report_rate(priv, desc->td_info, byTsr0, byTsr1);
 872
 873                         device_free_tx_buf(priv, desc);
 874                         priv->iTDUsed[idx]--;
 875                 }
 876         }
 877
 878         priv->apTailTD[idx] = desc;
 879
 880         return works;
 881 }
 882
 883 static void device_error(struct vnt_private *priv, unsigned short status)
 884 {
 885         if (status & ISR_FETALERR) {
 886                 dev_err(&priv->pcid->dev, "Hardware fatal error\n");
 887
 888                 MACbShutdown(priv);
 889                 return;
 890         }
 891 }
 892
 893 static void device_free_tx_buf(struct vnt_private *priv,
 894                                struct vnt_tx_desc *desc)
 895 {
 896         struct vnt_td_info *td_info = desc->td_info;
 897         struct sk_buff *skb = td_info->skb;
 898
 899         if (skb)
 900                 ieee80211_tx_status_irqsafe(priv->hw, skb);
 901
 902         td_info->skb = NULL;
 903         td_info->flags = 0;
 904 }
 905
 906 static void vnt_check_bb_vga(struct vnt_private *priv)
 907 {
 908         long dbm;
 909         int i;
 910
 911         if (!priv->bUpdateBBVGA)
 912                 return;
 913
 914         if (priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
 915                 return;
 916
 917         if (!(priv->vif->bss_conf.assoc && priv->uCurrRSSI))
 918                 return;
 919
 920         RFvRSSITodBm(priv, (u8)priv->uCurrRSSI, &dbm);
 921
 922         for (i = 0; i < BB_VGA_LEVEL; i++) {
 923                 if (dbm < priv->ldBmThreshold[i]) {
 924                         priv->byBBVGANew = priv->abyBBVGA[i];
 925                         break;
 926                 }
 927         }
 928
 929         if (priv->byBBVGANew == priv->byBBVGACurrent) {
 930                 priv->uBBVGADiffCount = 1;
 931                 return;
 932         }
 933
 934         priv->uBBVGADiffCount++;
 935
 936         if (priv->uBBVGADiffCount == 1) {
 937                 /* first VGA diff gain */
 938                 BBvSetVGAGainOffset(priv, priv->byBBVGANew);
 939
 940                 dev_dbg(&priv->pcid->dev,
 941                         "First RSSI[%d] NewGain[%d] OldGain[%d] Count[%d]\n",
 942                         (int)dbm, priv->byBBVGANew,
 943                         priv->byBBVGACurrent,
 944                         (int)priv->uBBVGADiffCount);
 945         }
 946
 947         if (priv->uBBVGADiffCount >= BB_VGA_CHANGE_THRESHOLD) {
 948                 dev_dbg(&priv->pcid->dev,
 949                         "RSSI[%d] NewGain[%d] OldGain[%d] Count[%d]\n",
 950                         (int)dbm, priv->byBBVGANew,
 951                         priv->byBBVGACurrent,
 952                         (int)priv->uBBVGADiffCount);
 953
 954                 BBvSetVGAGainOffset(priv, priv->byBBVGANew);
 955         }
 956 }
 957
 958 static void vnt_interrupt_process(struct vnt_private *priv)
 959 {
 960         struct ieee80211_low_level_stats *low_stats = &priv->low_stats;
 961         int             max_count = 0;
 962         u32 mib_counter;
 963         u32 isr;
 964         unsigned long flags;
 965
 966         MACvReadISR(priv->PortOffset, &isr);
 967
 968         if (isr == 0)
 969                 return;
 970
 971         if (isr == 0xffffffff) {
 972                 pr_debug("isr = 0xffff\n");
 973                 return;
 974         }
 975
 976         spin_lock_irqsave(&priv->lock, flags);
 977
 978         /* Read low level stats */
 979         MACvReadMIBCounter(priv->PortOffset, &mib_counter);
 980
 981         low_stats->dot11RTSSuccessCount += mib_counter & 0xff;
 982         low_stats->dot11RTSFailureCount += (mib_counter >> 8) & 0xff;
 983         low_stats->dot11ACKFailureCount += (mib_counter >> 16) & 0xff;
 984         low_stats->dot11FCSErrorCount += (mib_counter >> 24) & 0xff;
 985
 986         /*
 987          * TBD....
 988          * Must do this after doing rx/tx, cause ISR bit is slow
 989          * than RD/TD write back
 990          * update ISR counter
 991          */
 992         while (isr && priv->vif) {
 993                 MACvWriteISR(priv->PortOffset, isr);
 994
 995                 if (isr & ISR_FETALERR) {
 996                         pr_debug(" ISR_FETALERR\n");
 997                         VNSvOutPortB(priv->PortOffset + MAC_REG_SOFTPWRCTL, 0);
 998                         VNSvOutPortW(priv->PortOffset +
 999                                      MAC_REG_SOFTPWRCTL, SOFTPWRCTL_SWPECTI);
1000                         device_error(priv, isr);
1001                 }
1002
1003                 if (isr & ISR_TBTT) {
1004                         if (priv->op_mode != NL80211_IFTYPE_ADHOC)
1005                                 vnt_check_bb_vga(priv);
1006
1007                         priv->bBeaconSent = false;
1008                         if (priv->bEnablePSMode)
1009                                 PSbIsNextTBTTWakeUp((void *)priv);
1010
1011                         if ((priv->op_mode == NL80211_IFTYPE_AP ||
1012                             priv->op_mode == NL80211_IFTYPE_ADHOC) &&
1013                             priv->vif->bss_conf.enable_beacon) {
1014                                 MACvOneShotTimer1MicroSec(priv,
1015                                                           (priv->vif->bss_conf.beacon_int - MAKE_BEACON_RESERVED) << 10);
1016                         }
1017
1018                         /* TODO: adhoc PS mode */
1019                 }
1020
1021                 if (isr & ISR_BNTX) {
1022                         if (priv->op_mode == NL80211_IFTYPE_ADHOC) {
1023                                 priv->bIsBeaconBufReadySet = false;
1024                                 priv->cbBeaconBufReadySetCnt = 0;
1025                         }
1026
1027                         priv->bBeaconSent = true;
1028                 }
1029
1030                 if (isr & ISR_RXDMA0)
1031                         max_count += device_rx_srv(priv, TYPE_RXDMA0);
1032
1033                 if (isr & ISR_RXDMA1)
1034                         max_count += device_rx_srv(priv, TYPE_RXDMA1);
1035
1036                 if (isr & ISR_TXDMA0)
1037                         max_count += device_tx_srv(priv, TYPE_TXDMA0);
1038
1039                 if (isr & ISR_AC0DMA)
1040                         max_count += device_tx_srv(priv, TYPE_AC0DMA);
1041
1042                 if (isr & ISR_SOFTTIMER1) {
1043                         if (priv->vif->bss_conf.enable_beacon)
1044                                 vnt_beacon_make(priv, priv->vif);
1045                 }
1046
1047                 /* If both buffers available wake the queue */
1048                 if (AVAIL_TD(priv, TYPE_TXDMA0) &&
1049                     AVAIL_TD(priv, TYPE_AC0DMA) &&
1050                     ieee80211_queue_stopped(priv->hw, 0))
1051                         ieee80211_wake_queues(priv->hw);
1052
1053                 MACvReadISR(priv->PortOffset, &isr);
1054
1055                 MACvReceive0(priv->PortOffset);
1056                 MACvReceive1(priv->PortOffset);
1057
1058                 if (max_count > priv->opts.int_works)
1059                         break;
1060         }
1061
1062         spin_unlock_irqrestore(&priv->lock, flags);
1063 }
1064
1065 static void vnt_interrupt_work(struct work_struct *work)
1066 {
1067         struct vnt_private *priv =
1068                 container_of(work, struct vnt_private, interrupt_work);
1069
1070         if (priv->vif)
1071                 vnt_interrupt_process(priv);
1072
1073         MACvIntEnable(priv->PortOffset, IMR_MASK_VALUE);
1074 }
1075
1076 static irqreturn_t vnt_interrupt(int irq,  void *arg)
1077 {
1078         struct vnt_private *priv = arg;
1079
1080         schedule_work(&priv->interrupt_work);
1081
1082         MACvIntDisable(priv->PortOffset);
1083
1084         return IRQ_HANDLED;
1085 }
1086
1087 static int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
1088 {
1089         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1090         struct vnt_tx_desc *head_td;
1091         u32 dma_idx;
1092         unsigned long flags;
1093
1094         spin_lock_irqsave(&priv->lock, flags);
1095
1096         if (ieee80211_is_data(hdr->frame_control))
1097                 dma_idx = TYPE_AC0DMA;
1098         else
1099                 dma_idx = TYPE_TXDMA0;
1100
1101         if (AVAIL_TD(priv, dma_idx) < 1) {
1102                 spin_unlock_irqrestore(&priv->lock, flags);
1103                 ieee80211_stop_queues(priv->hw);
1104                 return -ENOMEM;
1105         }
1106
1107         head_td = priv->apCurrTD[dma_idx];
1108
1109         head_td->td1.tcr = 0;
1110
1111         head_td->td_info->skb = skb;
1112
1113         if (dma_idx == TYPE_AC0DMA)
1114                 head_td->td_info->flags = TD_FLAGS_NETIF_SKB;
1115
1116         priv->apCurrTD[dma_idx] = head_td->next;
1117
1118         spin_unlock_irqrestore(&priv->lock, flags);
1119
1120         vnt_generate_fifo_header(priv, dma_idx, head_td, skb);
1121
1122         spin_lock_irqsave(&priv->lock, flags);
1123
1124         priv->bPWBitOn = false;
1125
1126         /* Set TSR1 & ReqCount in TxDescHead */
1127         head_td->td1.tcr |= (TCR_STP | TCR_EDP | EDMSDU);
1128         head_td->td1.req_count = cpu_to_le16(head_td->td_info->req_count);
1129
1130         head_td->buff_addr = cpu_to_le32(head_td->td_info->buf_dma);
1131
1132         /* Poll Transmit the adapter */
1133         wmb();
1134         head_td->td0.owner = OWNED_BY_NIC;
1135         wmb(); /* second memory barrier */
1136
1137         if (head_td->td_info->flags & TD_FLAGS_NETIF_SKB)
1138                 MACvTransmitAC0(priv->PortOffset);
1139         else
1140                 MACvTransmit0(priv->PortOffset);
1141
1142         priv->iTDUsed[dma_idx]++;
1143
1144         spin_unlock_irqrestore(&priv->lock, flags);
1145
1146         return 0;
1147 }
1148
1149 static void vnt_tx_80211(struct ieee80211_hw *hw,
1150                          struct ieee80211_tx_control *control,
1151                          struct sk_buff *skb)
1152 {
1153         struct vnt_private *priv = hw->priv;
1154
1155         if (vnt_tx_packet(priv, skb))
1156                 ieee80211_free_txskb(hw, skb);
1157 }
1158
1159 static int vnt_start(struct ieee80211_hw *hw)
1160 {
1161         struct vnt_private *priv = hw->priv;
1162         int ret;
1163
1164         priv->rx_buf_sz = PKT_BUF_SZ;
1165         if (!device_init_rings(priv))
1166                 return -ENOMEM;
1167
1168         ret = request_irq(priv->pcid->irq, vnt_interrupt,
1169                           IRQF_SHARED, "vt6655", priv);
1170         if (ret) {
1171                 dev_dbg(&priv->pcid->dev, "failed to start irq\n");
1172                 return ret;
1173         }
1174
1175         dev_dbg(&priv->pcid->dev, "call device init rd0 ring\n");
1176         device_init_rd0_ring(priv);
1177         device_init_rd1_ring(priv);
1178         device_init_td0_ring(priv);
1179         device_init_td1_ring(priv);
1180
1181         device_init_registers(priv);
1182
1183         dev_dbg(&priv->pcid->dev, "call MACvIntEnable\n");
1184         MACvIntEnable(priv->PortOffset, IMR_MASK_VALUE);
1185
1186         ieee80211_wake_queues(hw);
1187
1188         return 0;
1189 }
1190
1191 static void vnt_stop(struct ieee80211_hw *hw)
1192 {
1193         struct vnt_private *priv = hw->priv;
1194
1195         ieee80211_stop_queues(hw);
1196
1197         cancel_work_sync(&priv->interrupt_work);
1198
1199         MACbShutdown(priv);
1200         MACbSoftwareReset(priv);
1201         CARDbRadioPowerOff(priv);
1202
1203         device_free_td0_ring(priv);
1204         device_free_td1_ring(priv);
1205         device_free_rd0_ring(priv);
1206         device_free_rd1_ring(priv);
1207         device_free_rings(priv);
1208
1209         free_irq(priv->pcid->irq, priv);
1210 }
1211
1212 static int vnt_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1213 {
1214         struct vnt_private *priv = hw->priv;
1215
1216         priv->vif = vif;
1217
1218         switch (vif->type) {
1219         case NL80211_IFTYPE_STATION:
1220                 break;
1221         case NL80211_IFTYPE_ADHOC:
1222                 MACvRegBitsOff(priv->PortOffset, MAC_REG_RCR, RCR_UNICAST);
1223
1224                 MACvRegBitsOn(priv->PortOffset, MAC_REG_HOSTCR, HOSTCR_ADHOC);
1225
1226                 break;
1227         case NL80211_IFTYPE_AP:
1228                 MACvRegBitsOff(priv->PortOffset, MAC_REG_RCR, RCR_UNICAST);
1229
1230                 MACvRegBitsOn(priv->PortOffset, MAC_REG_HOSTCR, HOSTCR_AP);
1231
1232                 break;
1233         default:
1234                 return -EOPNOTSUPP;
1235         }
1236
1237         priv->op_mode = vif->type;
1238
1239         return 0;
1240 }
1241
1242 static void vnt_remove_interface(struct ieee80211_hw *hw,
1243                                  struct ieee80211_vif *vif)
1244 {
1245         struct vnt_private *priv = hw->priv;
1246
1247         switch (vif->type) {
1248         case NL80211_IFTYPE_STATION:
1249                 break;
1250         case NL80211_IFTYPE_ADHOC:
1251                 MACvRegBitsOff(priv->PortOffset, MAC_REG_TCR, TCR_AUTOBCNTX);
1252                 MACvRegBitsOff(priv->PortOffset,
1253                                MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1254                 MACvRegBitsOff(priv->PortOffset, MAC_REG_HOSTCR, HOSTCR_ADHOC);
1255                 break;
1256         case NL80211_IFTYPE_AP:
1257                 MACvRegBitsOff(priv->PortOffset, MAC_REG_TCR, TCR_AUTOBCNTX);
1258                 MACvRegBitsOff(priv->PortOffset,
1259                                MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1260                 MACvRegBitsOff(priv->PortOffset, MAC_REG_HOSTCR, HOSTCR_AP);
1261                 break;
1262         default:
1263                 break;
1264         }
1265
1266         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
1267 }
1268
1269 static int vnt_config(struct ieee80211_hw *hw, u32 changed)
1270 {
1271         struct vnt_private *priv = hw->priv;
1272         struct ieee80211_conf *conf = &hw->conf;
1273         u8 bb_type;
1274
1275         if (changed & IEEE80211_CONF_CHANGE_PS) {
1276                 if (conf->flags & IEEE80211_CONF_PS)
1277                         PSvEnablePowerSaving(priv, conf->listen_interval);
1278                 else
1279                         PSvDisablePowerSaving(priv);
1280         }
1281
1282         if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) ||
1283             (conf->flags & IEEE80211_CONF_OFFCHANNEL)) {
1284                 set_channel(priv, conf->chandef.chan);
1285
1286                 if (conf->chandef.chan->band == NL80211_BAND_5GHZ)
1287                         bb_type = BB_TYPE_11A;
1288                 else
1289                         bb_type = BB_TYPE_11G;
1290
1291                 if (priv->byBBType != bb_type) {
1292                         priv->byBBType = bb_type;
1293
1294                         CARDbSetPhyParameter(priv, priv->byBBType);
1295                 }
1296         }
1297
1298         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1299                 if (priv->byBBType == BB_TYPE_11B)
1300                         priv->wCurrentRate = RATE_1M;
1301                 else
1302                         priv->wCurrentRate = RATE_54M;
1303
1304                 RFbSetPower(priv, priv->wCurrentRate,
1305                             conf->chandef.chan->hw_value);
1306         }
1307
1308         return 0;
1309 }
1310
1311 static void vnt_bss_info_changed(struct ieee80211_hw *hw,
1312                                  struct ieee80211_vif *vif,
1313                                  struct ieee80211_bss_conf *conf, u32 changed)
1314 {
1315         struct vnt_private *priv = hw->priv;
1316
1317         priv->current_aid = conf->aid;
1318
1319         if (changed & BSS_CHANGED_BSSID && conf->bssid) {
1320                 unsigned long flags;
1321
1322                 spin_lock_irqsave(&priv->lock, flags);
1323
1324                 MACvWriteBSSIDAddress(priv->PortOffset, (u8 *)conf->bssid);
1325
1326                 spin_unlock_irqrestore(&priv->lock, flags);
1327         }
1328
1329         if (changed & BSS_CHANGED_BASIC_RATES) {
1330                 priv->basic_rates = conf->basic_rates;
1331
1332                 CARDvUpdateBasicTopRate(priv);
1333
1334                 dev_dbg(&priv->pcid->dev,
1335                         "basic rates %x\n", conf->basic_rates);
1336         }
1337
1338         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1339                 if (conf->use_short_preamble) {
1340                         MACvEnableBarkerPreambleMd(priv->PortOffset);
1341                         priv->byPreambleType = true;
1342                 } else {
1343                         MACvDisableBarkerPreambleMd(priv->PortOffset);
1344                         priv->byPreambleType = false;
1345                 }
1346         }
1347
1348         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1349                 if (conf->use_cts_prot)
1350                         MACvEnableProtectMD(priv->PortOffset);
1351                 else
1352                         MACvDisableProtectMD(priv->PortOffset);
1353         }
1354
1355         if (changed & BSS_CHANGED_ERP_SLOT) {
1356                 if (conf->use_short_slot)
1357                         priv->bShortSlotTime = true;
1358                 else
1359                         priv->bShortSlotTime = false;
1360
1361                 CARDbSetPhyParameter(priv, priv->byBBType);
1362                 BBvSetVGAGainOffset(priv, priv->abyBBVGA[0]);
1363         }
1364
1365         if (changed & BSS_CHANGED_TXPOWER)
1366                 RFbSetPower(priv, priv->wCurrentRate,
1367                             conf->chandef.chan->hw_value);
1368
1369         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1370                 dev_dbg(&priv->pcid->dev,
1371                         "Beacon enable %d\n", conf->enable_beacon);
1372
1373                 if (conf->enable_beacon) {
1374                         vnt_beacon_enable(priv, vif, conf);
1375
1376                         MACvRegBitsOn(priv->PortOffset, MAC_REG_TCR,
1377                                       TCR_AUTOBCNTX);
1378                 } else {
1379                         MACvRegBitsOff(priv->PortOffset, MAC_REG_TCR,
1380                                        TCR_AUTOBCNTX);
1381                 }
1382         }
1383
1384         if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INFO) &&
1385             priv->op_mode != NL80211_IFTYPE_AP) {
1386                 if (conf->assoc && conf->beacon_rate) {
1387                         CARDbUpdateTSF(priv, conf->beacon_rate->hw_value,
1388                                        conf->sync_tsf);
1389
1390                         CARDbSetBeaconPeriod(priv, conf->beacon_int);
1391
1392                         CARDvSetFirstNextTBTT(priv, conf->beacon_int);
1393                 } else {
1394                         VNSvOutPortB(priv->PortOffset + MAC_REG_TFTCTL,
1395                                      TFTCTL_TSFCNTRST);
1396                         VNSvOutPortB(priv->PortOffset + MAC_REG_TFTCTL,
1397                                      TFTCTL_TSFCNTREN);
1398                 }
1399         }
1400 }
1401
1402 static u64 vnt_prepare_multicast(struct ieee80211_hw *hw,
1403                                  struct netdev_hw_addr_list *mc_list)
1404 {
1405         struct vnt_private *priv = hw->priv;
1406         struct netdev_hw_addr *ha;
1407         u64 mc_filter = 0;
1408         u32 bit_nr = 0;
1409
1410         netdev_hw_addr_list_for_each(ha, mc_list) {
1411                 bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
1412
1413                 mc_filter |= 1ULL << (bit_nr & 0x3f);
1414         }
1415
1416         priv->mc_list_count = mc_list->count;
1417
1418         return mc_filter;
1419 }
1420
1421 static void vnt_configure(struct ieee80211_hw *hw,
1422                           unsigned int changed_flags,
1423                           unsigned int *total_flags, u64 multicast)
1424 {
1425         struct vnt_private *priv = hw->priv;
1426         u8 rx_mode = 0;
1427
1428         *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC;
1429
1430         VNSvInPortB(priv->PortOffset + MAC_REG_RCR, &rx_mode);
1431
1432         dev_dbg(&priv->pcid->dev, "rx mode in = %x\n", rx_mode);
1433
1434         if (changed_flags & FIF_ALLMULTI) {
1435                 if (*total_flags & FIF_ALLMULTI) {
1436                         unsigned long flags;
1437
1438                         spin_lock_irqsave(&priv->lock, flags);
1439
1440                         if (priv->mc_list_count > 2) {
1441                                 MACvSelectPage1(priv->PortOffset);
1442
1443                                 VNSvOutPortD(priv->PortOffset +
1444                                              MAC_REG_MAR0, 0xffffffff);
1445                                 VNSvOutPortD(priv->PortOffset +
1446                                             MAC_REG_MAR0 + 4, 0xffffffff);
1447
1448                                 MACvSelectPage0(priv->PortOffset);
1449                         } else {
1450                                 MACvSelectPage1(priv->PortOffset);
1451
1452                                 VNSvOutPortD(priv->PortOffset +
1453                                              MAC_REG_MAR0, (u32)multicast);
1454                                 VNSvOutPortD(priv->PortOffset +
1455                                              MAC_REG_MAR0 + 4,
1456                                              (u32)(multicast >> 32));
1457
1458                                 MACvSelectPage0(priv->PortOffset);
1459                         }
1460
1461                         spin_unlock_irqrestore(&priv->lock, flags);
1462
1463                         rx_mode |= RCR_MULTICAST | RCR_BROADCAST;
1464                 } else {
1465                         rx_mode &= ~(RCR_MULTICAST | RCR_BROADCAST);
1466                 }
1467         }
1468
1469         if (changed_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC)) {
1470                 rx_mode |= RCR_MULTICAST | RCR_BROADCAST;
1471
1472                 if (*total_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC))
1473                         rx_mode &= ~RCR_BSSID;
1474                 else
1475                         rx_mode |= RCR_BSSID;
1476         }
1477
1478         VNSvOutPortB(priv->PortOffset + MAC_REG_RCR, rx_mode);
1479
1480         dev_dbg(&priv->pcid->dev, "rx mode out= %x\n", rx_mode);
1481 }
1482
1483 static int vnt_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1484                        struct ieee80211_vif *vif, struct ieee80211_sta *sta,
1485                        struct ieee80211_key_conf *key)
1486 {
1487         struct vnt_private *priv = hw->priv;
1488
1489         switch (cmd) {
1490         case SET_KEY:
1491                 if (vnt_set_keys(hw, sta, vif, key))
1492                         return -EOPNOTSUPP;
1493                 break;
1494         case DISABLE_KEY:
1495                 if (test_bit(key->hw_key_idx, &priv->key_entry_inuse))
1496                         clear_bit(key->hw_key_idx, &priv->key_entry_inuse);
1497         default:
1498                 break;
1499         }
1500
1501         return 0;
1502 }
1503
1504 static int vnt_get_stats(struct ieee80211_hw *hw,
1505                          struct ieee80211_low_level_stats *stats)
1506 {
1507         struct vnt_private *priv = hw->priv;
1508
1509         memcpy(stats, &priv->low_stats, sizeof(*stats));
1510
1511         return 0;
1512 }
1513
1514 static u64 vnt_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1515 {
1516         struct vnt_private *priv = hw->priv;
1517         u64 tsf;
1518
1519         CARDbGetCurrentTSF(priv, &tsf);
1520
1521         return tsf;
1522 }
1523
1524 static void vnt_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1525                         u64 tsf)
1526 {
1527         struct vnt_private *priv = hw->priv;
1528
1529         CARDvUpdateNextTBTT(priv, tsf, vif->bss_conf.beacon_int);
1530 }
1531
1532 static void vnt_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1533 {
1534         struct vnt_private *priv = hw->priv;
1535
1536         /* reset TSF counter */
1537         VNSvOutPortB(priv->PortOffset + MAC_REG_TFTCTL, TFTCTL_TSFCNTRST);
1538 }
1539
1540 static const struct ieee80211_ops vnt_mac_ops = {
1541         .tx                     = vnt_tx_80211,
1542         .start                  = vnt_start,
1543         .stop                   = vnt_stop,
1544         .add_interface          = vnt_add_interface,
1545         .remove_interface       = vnt_remove_interface,
1546         .config                 = vnt_config,
1547         .bss_info_changed       = vnt_bss_info_changed,
1548         .prepare_multicast      = vnt_prepare_multicast,
1549         .configure_filter       = vnt_configure,
1550         .set_key                = vnt_set_key,
1551         .get_stats              = vnt_get_stats,
1552         .get_tsf                = vnt_get_tsf,
1553         .set_tsf                = vnt_set_tsf,
1554         .reset_tsf              = vnt_reset_tsf,
1555 };
1556
1557 static int vnt_init(struct vnt_private *priv)
1558 {
1559         SET_IEEE80211_PERM_ADDR(priv->hw, priv->abyCurrentNetAddr);
1560
1561         vnt_init_bands(priv);
1562
1563         if (ieee80211_register_hw(priv->hw))
1564                 return -ENODEV;
1565
1566         priv->mac_hw = true;
1567
1568         CARDbRadioPowerOff(priv);
1569
1570         return 0;
1571 }
1572
1573 static int
1574 vt6655_probe(struct pci_dev *pcid, const struct pci_device_id *ent)
1575 {
1576         struct vnt_private *priv;
1577         struct ieee80211_hw *hw;
1578         struct wiphy *wiphy;
1579         int         rc;
1580
1581         dev_notice(&pcid->dev,
1582                    "%s Ver. %s\n", DEVICE_FULL_DRV_NAM, DEVICE_VERSION);
1583
1584         dev_notice(&pcid->dev,
1585                    "Copyright (c) 2003 VIA Networking Technologies, Inc.\n");
1586
1587         hw = ieee80211_alloc_hw(sizeof(*priv), &vnt_mac_ops);
1588         if (!hw) {
1589                 dev_err(&pcid->dev, "could not register ieee80211_hw\n");
1590                 return -ENOMEM;
1591         }
1592
1593         priv = hw->priv;
1594         priv->pcid = pcid;
1595
1596         spin_lock_init(&priv->lock);
1597
1598         priv->hw = hw;
1599
1600         SET_IEEE80211_DEV(priv->hw, &pcid->dev);
1601
1602         if (pci_enable_device(pcid)) {
1603                 device_free_info(priv);
1604                 return -ENODEV;
1605         }
1606
1607         dev_dbg(&pcid->dev,
1608                 "Before get pci_info memaddr is %x\n", priv->memaddr);
1609
1610         pci_set_master(pcid);
1611
1612         priv->memaddr = pci_resource_start(pcid, 0);
1613         priv->ioaddr = pci_resource_start(pcid, 1);
1614         priv->PortOffset = ioremap(priv->memaddr & PCI_BASE_ADDRESS_MEM_MASK,
1615                                    256);
1616         if (!priv->PortOffset) {
1617                 dev_err(&pcid->dev, ": Failed to IO remapping ..\n");
1618                 device_free_info(priv);
1619                 return -ENODEV;
1620         }
1621
1622         rc = pci_request_regions(pcid, DEVICE_NAME);
1623         if (rc) {
1624                 dev_err(&pcid->dev, ": Failed to find PCI device\n");
1625                 device_free_info(priv);
1626                 return -ENODEV;
1627         }
1628
1629         if (dma_set_mask(&pcid->dev, DMA_BIT_MASK(32))) {
1630                 dev_err(&pcid->dev, ": Failed to set dma 32 bit mask\n");
1631                 device_free_info(priv);
1632                 return -ENODEV;
1633         }
1634
1635         INIT_WORK(&priv->interrupt_work, vnt_interrupt_work);
1636
1637         /* do reset */
1638         if (!MACbSoftwareReset(priv)) {
1639                 dev_err(&pcid->dev, ": Failed to access MAC hardware..\n");
1640                 device_free_info(priv);
1641                 return -ENODEV;
1642         }
1643         /* initial to reload eeprom */
1644         MACvInitialize(priv);
1645         MACvReadEtherAddress(priv->PortOffset, priv->abyCurrentNetAddr);
1646
1647         /* Get RFType */
1648         priv->byRFType = SROMbyReadEmbedded(priv->PortOffset, EEP_OFS_RFTYPE);
1649         priv->byRFType &= RF_MASK;
1650
1651         dev_dbg(&pcid->dev, "RF Type = %x\n", priv->byRFType);
1652
1653         device_get_options(priv);
1654         device_set_options(priv);
1655
1656         wiphy = priv->hw->wiphy;
1657
1658         wiphy->frag_threshold = FRAG_THRESH_DEF;
1659         wiphy->rts_threshold = RTS_THRESH_DEF;
1660         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1661                 BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP);
1662
1663         ieee80211_hw_set(priv->hw, TIMING_BEACON_ONLY);
1664         ieee80211_hw_set(priv->hw, SIGNAL_DBM);
1665         ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1666         ieee80211_hw_set(priv->hw, REPORTS_TX_ACK_STATUS);
1667         ieee80211_hw_set(priv->hw, SUPPORTS_PS);
1668
1669         priv->hw->max_signal = 100;
1670
1671         if (vnt_init(priv)) {
1672                 device_free_info(priv);
1673                 return -ENODEV;
1674         }
1675
1676         device_print_info(priv);
1677         pci_set_drvdata(pcid, priv);
1678
1679         return 0;
1680 }
1681
1682 /*------------------------------------------------------------------*/
1683
1684 #ifdef CONFIG_PM
1685 static int vt6655_suspend(struct pci_dev *pcid, pm_message_t state)
1686 {
1687         struct vnt_private *priv = pci_get_drvdata(pcid);
1688         unsigned long flags;
1689
1690         spin_lock_irqsave(&priv->lock, flags);
1691
1692         pci_save_state(pcid);
1693
1694         MACbShutdown(priv);
1695
1696         pci_disable_device(pcid);
1697
1698         spin_unlock_irqrestore(&priv->lock, flags);
1699
1700         pci_set_power_state(pcid, pci_choose_state(pcid, state));
1701
1702         return 0;
1703 }
1704
1705 static int vt6655_resume(struct pci_dev *pcid)
1706 {
1707         pci_set_power_state(pcid, PCI_D0);
1708         pci_enable_wake(pcid, PCI_D0, 0);
1709         pci_restore_state(pcid);
1710
1711         return 0;
1712 }
1713 #endif
1714
1715 MODULE_DEVICE_TABLE(pci, vt6655_pci_id_table);
1716
1717 static struct pci_driver device_driver = {
1718         .name = DEVICE_NAME,
1719         .id_table = vt6655_pci_id_table,
1720         .probe = vt6655_probe,
1721         .remove = vt6655_remove,
1722 #ifdef CONFIG_PM
1723         .suspend = vt6655_suspend,
1724         .resume = vt6655_resume,
1725 #endif
1726 };
1727
1728 module_pci_driver(device_driver);