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Linux/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  * 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: device_main.c
 20  *
 21  * Purpose: driver entry for initial, open, close, tx and rx.
 22  *
 23  * Author: Lyndon Chen
 24  *
 25  * Date: Jan 8, 2003
 26  *
 27  * Functions:
 28  *
 29  *   vt6655_probe - module initial (insmod) driver entry
 30  *   vt6655_remove - module remove entry
 31  *   device_free_info - device structure resource free function
 32  *   device_print_info - print out resource
 33  *   device_rx_srv - rx service function
 34  *   device_alloc_rx_buf - rx buffer pre-allocated function
 35  *   device_free_tx_buf - free tx buffer function
 36  *   device_init_rd0_ring- initial rd dma0 ring
 37  *   device_init_rd1_ring- initial rd dma1 ring
 38  *   device_init_td0_ring- initial tx dma0 ring buffer
 39  *   device_init_td1_ring- initial tx dma1 ring buffer
 40  *   device_init_registers- initial MAC & BBP & RF internal registers.
 41  *   device_init_rings- initial tx/rx ring buffer
 42  *   device_free_rings- free all allocated ring buffer
 43  *   device_tx_srv- tx interrupt service function
 44  *
 45  * Revision History:
 46  */
 47 #undef __NO_VERSION__
 48 
 49 #include <linux/file.h>
 50 #include "device.h"
 51 #include "card.h"
 52 #include "channel.h"
 53 #include "baseband.h"
 54 #include "mac.h"
 55 #include "power.h"
 56 #include "rxtx.h"
 57 #include "dpc.h"
 58 #include "rf.h"
 59 #include <linux/delay.h>
 60 #include <linux/kthread.h>
 61 #include <linux/slab.h>
 62 
 63 /*---------------------  Static Definitions -------------------------*/
 64 /*
 65  * Define module options
 66  */
 67 MODULE_AUTHOR("VIA Networking Technologies, Inc., <lyndonchen@vntek.com.tw>");
 68 MODULE_LICENSE("GPL");
 69 MODULE_DESCRIPTION("VIA Networking Solomon-A/B/G Wireless LAN Adapter Driver");
 70 
 71 #define DEVICE_PARAM(N, D)
 72 
 73 #define RX_DESC_MIN0     16
 74 #define RX_DESC_MAX0     128
 75 #define RX_DESC_DEF0     32
 76 DEVICE_PARAM(RxDescriptors0, "Number of receive descriptors0");
 77 
 78 #define RX_DESC_MIN1     16
 79 #define RX_DESC_MAX1     128
 80 #define RX_DESC_DEF1     32
 81 DEVICE_PARAM(RxDescriptors1, "Number of receive descriptors1");
 82 
 83 #define TX_DESC_MIN0     16
 84 #define TX_DESC_MAX0     128
 85 #define TX_DESC_DEF0     32
 86 DEVICE_PARAM(TxDescriptors0, "Number of transmit descriptors0");
 87 
 88 #define TX_DESC_MIN1     16
 89 #define TX_DESC_MAX1     128
 90 #define TX_DESC_DEF1     64
 91 DEVICE_PARAM(TxDescriptors1, "Number of transmit descriptors1");
 92 
 93 #define INT_WORKS_DEF   20
 94 #define INT_WORKS_MIN   10
 95 #define INT_WORKS_MAX   64
 96 
 97 DEVICE_PARAM(int_works, "Number of packets per interrupt services");
 98 
 99 #define RTS_THRESH_DEF     2347
100 
101 #define FRAG_THRESH_DEF     2346
102 
103 #define SHORT_RETRY_MIN     0
104 #define SHORT_RETRY_MAX     31
105 #define SHORT_RETRY_DEF     8
106 
107 DEVICE_PARAM(ShortRetryLimit, "Short frame retry limits");
108 
109 #define LONG_RETRY_MIN     0
110 #define LONG_RETRY_MAX     15
111 #define LONG_RETRY_DEF     4
112 
113 DEVICE_PARAM(LongRetryLimit, "long frame retry limits");
114 
115 /* BasebandType[] baseband type selected
116    0: indicate 802.11a type
117    1: indicate 802.11b type
118    2: indicate 802.11g type
119 */
120 #define BBP_TYPE_MIN     0
121 #define BBP_TYPE_MAX     2
122 #define BBP_TYPE_DEF     2
123 
124 DEVICE_PARAM(BasebandType, "baseband type");
125 
126 /*
127  * Static vars definitions
128  */
129 static const struct pci_device_id vt6655_pci_id_table[] = {
130         { PCI_VDEVICE(VIA, 0x3253) },
131         { 0, }
132 };
133 
134 /*---------------------  Static Functions  --------------------------*/
135 
136 static int  vt6655_probe(struct pci_dev *pcid, const struct pci_device_id *ent);
137 static void device_free_info(struct vnt_private *priv);
138 static void device_print_info(struct vnt_private *priv);
139 
140 static void device_init_rd0_ring(struct vnt_private *priv);
141 static void device_init_rd1_ring(struct vnt_private *priv);
142 static void device_init_td0_ring(struct vnt_private *priv);
143 static void device_init_td1_ring(struct vnt_private *priv);
144 
145 static int  device_rx_srv(struct vnt_private *priv, unsigned int idx);
146 static int  device_tx_srv(struct vnt_private *priv, unsigned int idx);
147 static bool device_alloc_rx_buf(struct vnt_private *, struct vnt_rx_desc *);
148 static void device_init_registers(struct vnt_private *priv);
149 static void device_free_tx_buf(struct vnt_private *, struct vnt_tx_desc *);
150 static void device_free_td0_ring(struct vnt_private *priv);
151 static void device_free_td1_ring(struct vnt_private *priv);
152 static void device_free_rd0_ring(struct vnt_private *priv);
153 static void device_free_rd1_ring(struct vnt_private *priv);
154 static void device_free_rings(struct vnt_private *priv);
155 
156 /*---------------------  Export Variables  --------------------------*/
157 
158 /*---------------------  Export Functions  --------------------------*/
159 
160 static void vt6655_remove(struct pci_dev *pcid)
161 {
162         struct vnt_private *priv = pci_get_drvdata(pcid);
163 
164         if (priv == NULL)
165                 return;
166         device_free_info(priv);
167 }
168 
169 static void device_get_options(struct vnt_private *priv)
170 {
171         struct vnt_options *opts = &priv->opts;
172 
173         opts->rx_descs0 = RX_DESC_DEF0;
174         opts->rx_descs1 = RX_DESC_DEF1;
175         opts->tx_descs[0] = TX_DESC_DEF0;
176         opts->tx_descs[1] = TX_DESC_DEF1;
177         opts->int_works = INT_WORKS_DEF;
178 
179         opts->short_retry = SHORT_RETRY_DEF;
180         opts->long_retry = LONG_RETRY_DEF;
181         opts->bbp_type = BBP_TYPE_DEF;
182 }
183 
184 static void
185 device_set_options(struct vnt_private *priv)
186 {
187         priv->byShortRetryLimit = priv->opts.short_retry;
188         priv->byLongRetryLimit = priv->opts.long_retry;
189         priv->byBBType = priv->opts.bbp_type;
190         priv->byPacketType = priv->byBBType;
191         priv->byAutoFBCtrl = AUTO_FB_0;
192         priv->bUpdateBBVGA = true;
193         priv->byPreambleType = 0;
194 
195         pr_debug(" byShortRetryLimit= %d\n", (int)priv->byShortRetryLimit);
196         pr_debug(" byLongRetryLimit= %d\n", (int)priv->byLongRetryLimit);
197         pr_debug(" byPreambleType= %d\n", (int)priv->byPreambleType);
198         pr_debug(" byShortPreamble= %d\n", (int)priv->byShortPreamble);
199         pr_debug(" byBBType= %d\n", (int)priv->byBBType);
200 }
201 
202 /*
203  * Initialisation of MAC & BBP registers
204  */
205 
206 static void device_init_registers(struct vnt_private *priv)
207 {
208         unsigned long flags;
209         unsigned int ii;
210         unsigned char byValue;
211         unsigned char byCCKPwrdBm = 0;
212         unsigned char byOFDMPwrdBm = 0;
213 
214         MACbShutdown(priv->PortOffset);
215         BBvSoftwareReset(priv);
216 
217         /* Do MACbSoftwareReset in MACvInitialize */
218         MACbSoftwareReset(priv->PortOffset);
219 
220         priv->bAES = false;
221 
222         /* Only used in 11g type, sync with ERP IE */
223         priv->bProtectMode = false;
224 
225         priv->bNonERPPresent = false;
226         priv->bBarkerPreambleMd = false;
227         priv->wCurrentRate = RATE_1M;
228         priv->byTopOFDMBasicRate = RATE_24M;
229         priv->byTopCCKBasicRate = RATE_1M;
230 
231         /* init MAC */
232         MACvInitialize(priv->PortOffset);
233 
234         /* Get Local ID */
235         VNSvInPortB(priv->PortOffset + MAC_REG_LOCALID, &priv->byLocalID);
236 
237         spin_lock_irqsave(&priv->lock, flags);
238 
239         SROMvReadAllContents(priv->PortOffset, priv->abyEEPROM);
240 
241         spin_unlock_irqrestore(&priv->lock, flags);
242 
243         /* Get Channel range */
244         priv->byMinChannel = 1;
245         priv->byMaxChannel = CB_MAX_CHANNEL;
246 
247         /* Get Antena */
248         byValue = SROMbyReadEmbedded(priv->PortOffset, EEP_OFS_ANTENNA);
249         if (byValue & EEP_ANTINV)
250                 priv->bTxRxAntInv = true;
251         else
252                 priv->bTxRxAntInv = false;
253 
254         byValue &= (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
255         /* if not set default is All */
256         if (byValue == 0)
257                 byValue = (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
258 
259         if (byValue == (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN)) {
260                 priv->byAntennaCount = 2;
261                 priv->byTxAntennaMode = ANT_B;
262                 priv->dwTxAntennaSel = 1;
263                 priv->dwRxAntennaSel = 1;
264 
265                 if (priv->bTxRxAntInv)
266                         priv->byRxAntennaMode = ANT_A;
267                 else
268                         priv->byRxAntennaMode = ANT_B;
269         } else  {
270                 priv->byAntennaCount = 1;
271                 priv->dwTxAntennaSel = 0;
272                 priv->dwRxAntennaSel = 0;
273 
274                 if (byValue & EEP_ANTENNA_AUX) {
275                         priv->byTxAntennaMode = ANT_A;
276 
277                         if (priv->bTxRxAntInv)
278                                 priv->byRxAntennaMode = ANT_B;
279                         else
280                                 priv->byRxAntennaMode = ANT_A;
281                 } else {
282                         priv->byTxAntennaMode = ANT_B;
283 
284                         if (priv->bTxRxAntInv)
285                                 priv->byRxAntennaMode = ANT_A;
286                         else
287                                 priv->byRxAntennaMode = ANT_B;
288                 }
289         }
290 
291         /* Set initial antenna mode */
292         BBvSetTxAntennaMode(priv, priv->byTxAntennaMode);
293         BBvSetRxAntennaMode(priv, priv->byRxAntennaMode);
294 
295         /* zonetype initial */
296         priv->byOriginalZonetype = priv->abyEEPROM[EEP_OFS_ZONETYPE];
297 
298         if (!priv->bZoneRegExist)
299                 priv->byZoneType = priv->abyEEPROM[EEP_OFS_ZONETYPE];
300 
301         pr_debug("priv->byZoneType = %x\n", priv->byZoneType);
302 
303         /* Init RF module */
304         RFbInit(priv);
305 
306         /* Get Desire Power Value */
307         priv->byCurPwr = 0xFF;
308         priv->byCCKPwr = SROMbyReadEmbedded(priv->PortOffset, EEP_OFS_PWR_CCK);
309         priv->byOFDMPwrG = SROMbyReadEmbedded(priv->PortOffset, EEP_OFS_PWR_OFDMG);
310 
311         /* Load power Table */
312         for (ii = 0; ii < CB_MAX_CHANNEL_24G; ii++) {
313                 priv->abyCCKPwrTbl[ii + 1] =
314                         SROMbyReadEmbedded(priv->PortOffset,
315                                            (unsigned char)(ii + EEP_OFS_CCK_PWR_TBL));
316                 if (priv->abyCCKPwrTbl[ii + 1] == 0)
317                         priv->abyCCKPwrTbl[ii+1] = priv->byCCKPwr;
318 
319                 priv->abyOFDMPwrTbl[ii + 1] =
320                         SROMbyReadEmbedded(priv->PortOffset,
321                                            (unsigned char)(ii + EEP_OFS_OFDM_PWR_TBL));
322                 if (priv->abyOFDMPwrTbl[ii + 1] == 0)
323                         priv->abyOFDMPwrTbl[ii + 1] = priv->byOFDMPwrG;
324 
325                 priv->abyCCKDefaultPwr[ii + 1] = byCCKPwrdBm;
326                 priv->abyOFDMDefaultPwr[ii + 1] = byOFDMPwrdBm;
327         }
328 
329         /* recover 12,13 ,14channel for EUROPE by 11 channel */
330         for (ii = 11; ii < 14; ii++) {
331                 priv->abyCCKPwrTbl[ii] = priv->abyCCKPwrTbl[10];
332                 priv->abyOFDMPwrTbl[ii] = priv->abyOFDMPwrTbl[10];
333         }
334 
335         /* Load OFDM A Power Table */
336         for (ii = 0; ii < CB_MAX_CHANNEL_5G; ii++) {
337                 priv->abyOFDMPwrTbl[ii + CB_MAX_CHANNEL_24G + 1] =
338                         SROMbyReadEmbedded(priv->PortOffset,
339                                            (unsigned char)(ii + EEP_OFS_OFDMA_PWR_TBL));
340 
341                 priv->abyOFDMDefaultPwr[ii + CB_MAX_CHANNEL_24G + 1] =
342                         SROMbyReadEmbedded(priv->PortOffset,
343                                            (unsigned char)(ii + EEP_OFS_OFDMA_PWR_dBm));
344         }
345 
346         if (priv->byLocalID > REV_ID_VT3253_B1) {
347                 MACvSelectPage1(priv->PortOffset);
348 
349                 VNSvOutPortB(priv->PortOffset + MAC_REG_MSRCTL + 1,
350                              (MSRCTL1_TXPWR | MSRCTL1_CSAPAREN));
351 
352                 MACvSelectPage0(priv->PortOffset);
353         }
354 
355         /* use relative tx timeout and 802.11i D4 */
356         MACvWordRegBitsOn(priv->PortOffset,
357                           MAC_REG_CFG, (CFG_TKIPOPT | CFG_NOTXTIMEOUT));
358 
359         /* set performance parameter by registry */
360         MACvSetShortRetryLimit(priv->PortOffset, priv->byShortRetryLimit);
361         MACvSetLongRetryLimit(priv->PortOffset, priv->byLongRetryLimit);
362 
363         /* reset TSF counter */
364         VNSvOutPortB(priv->PortOffset + MAC_REG_TFTCTL, TFTCTL_TSFCNTRST);
365         /* enable TSF counter */
366         VNSvOutPortB(priv->PortOffset + MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
367 
368         /* initialize BBP registers */
369         BBbVT3253Init(priv);
370 
371         if (priv->bUpdateBBVGA) {
372                 priv->byBBVGACurrent = priv->abyBBVGA[0];
373                 priv->byBBVGANew = priv->byBBVGACurrent;
374                 BBvSetVGAGainOffset(priv, priv->abyBBVGA[0]);
375         }
376 
377         BBvSetRxAntennaMode(priv, priv->byRxAntennaMode);
378         BBvSetTxAntennaMode(priv, priv->byTxAntennaMode);
379 
380         /* Set BB and packet type at the same time. */
381         /* Set Short Slot Time, xIFS, and RSPINF. */
382         priv->wCurrentRate = RATE_54M;
383 
384         priv->bRadioOff = false;
385 
386         priv->byRadioCtl = SROMbyReadEmbedded(priv->PortOffset,
387                                                  EEP_OFS_RADIOCTL);
388         priv->bHWRadioOff = false;
389 
390         if (priv->byRadioCtl & EEP_RADIOCTL_ENABLE) {
391                 /* Get GPIO */
392                 MACvGPIOIn(priv->PortOffset, &priv->byGPIO);
393 
394                 if (((priv->byGPIO & GPIO0_DATA) &&
395                      !(priv->byRadioCtl & EEP_RADIOCTL_INV)) ||
396                      (!(priv->byGPIO & GPIO0_DATA) &&
397                      (priv->byRadioCtl & EEP_RADIOCTL_INV)))
398                         priv->bHWRadioOff = true;
399         }
400 
401         if (priv->bHWRadioOff || priv->bRadioControlOff)
402                 CARDbRadioPowerOff(priv);
403 
404         /* get Permanent network address */
405         SROMvReadEtherAddress(priv->PortOffset, priv->abyCurrentNetAddr);
406         pr_debug("Network address = %pM\n", priv->abyCurrentNetAddr);
407 
408         /* reset Tx pointer */
409         CARDvSafeResetRx(priv);
410         /* reset Rx pointer */
411         CARDvSafeResetTx(priv);
412 
413         if (priv->byLocalID <= REV_ID_VT3253_A1)
414                 MACvRegBitsOn(priv->PortOffset, MAC_REG_RCR, RCR_WPAERR);
415 
416         /* Turn On Rx DMA */
417         MACvReceive0(priv->PortOffset);
418         MACvReceive1(priv->PortOffset);
419 
420         /* start the adapter */
421         MACvStart(priv->PortOffset);
422 }
423 
424 static void device_print_info(struct vnt_private *priv)
425 {
426         dev_info(&priv->pcid->dev, "MAC=%pM IO=0x%lx Mem=0x%lx IRQ=%d\n",
427                  priv->abyCurrentNetAddr, (unsigned long)priv->ioaddr,
428                  (unsigned long)priv->PortOffset, priv->pcid->irq);
429 }
430 
431 static void device_free_info(struct vnt_private *priv)
432 {
433         if (!priv)
434                 return;
435 
436         if (priv->mac_hw)
437                 ieee80211_unregister_hw(priv->hw);
438 
439         if (priv->PortOffset)
440                 iounmap(priv->PortOffset);
441 
442         if (priv->pcid)
443                 pci_release_regions(priv->pcid);
444 
445         if (priv->hw)
446                 ieee80211_free_hw(priv->hw);
447 }
448 
449 static bool device_init_rings(struct vnt_private *priv)
450 {
451         void *vir_pool;
452 
453         /*allocate all RD/TD rings a single pool*/
454         vir_pool = dma_zalloc_coherent(&priv->pcid->dev,
455                                        priv->opts.rx_descs0 * sizeof(struct vnt_rx_desc) +
456                                        priv->opts.rx_descs1 * sizeof(struct vnt_rx_desc) +
457                                        priv->opts.tx_descs[0] * sizeof(struct vnt_tx_desc) +
458                                        priv->opts.tx_descs[1] * sizeof(struct vnt_tx_desc),
459                                        &priv->pool_dma, GFP_ATOMIC);
460         if (vir_pool == NULL) {
461                 dev_err(&priv->pcid->dev, "allocate desc dma memory failed\n");
462                 return false;
463         }
464 
465         priv->aRD0Ring = vir_pool;
466         priv->aRD1Ring = vir_pool +
467                 priv->opts.rx_descs0 * sizeof(struct vnt_rx_desc);
468 
469         priv->rd0_pool_dma = priv->pool_dma;
470         priv->rd1_pool_dma = priv->rd0_pool_dma +
471                 priv->opts.rx_descs0 * sizeof(struct vnt_rx_desc);
472 
473         priv->tx0_bufs = dma_zalloc_coherent(&priv->pcid->dev,
474                                              priv->opts.tx_descs[0] * PKT_BUF_SZ +
475                                              priv->opts.tx_descs[1] * PKT_BUF_SZ +
476                                              CB_BEACON_BUF_SIZE +
477                                              CB_MAX_BUF_SIZE,
478                                              &priv->tx_bufs_dma0,
479                                              GFP_ATOMIC);
480         if (priv->tx0_bufs == NULL) {
481                 dev_err(&priv->pcid->dev, "allocate buf dma memory failed\n");
482 
483                 dma_free_coherent(&priv->pcid->dev,
484                                   priv->opts.rx_descs0 * sizeof(struct vnt_rx_desc) +
485                                   priv->opts.rx_descs1 * sizeof(struct vnt_rx_desc) +
486                                   priv->opts.tx_descs[0] * sizeof(struct vnt_tx_desc) +
487                                   priv->opts.tx_descs[1] * sizeof(struct vnt_tx_desc),
488                                   vir_pool, priv->pool_dma);
489                 return false;
490         }
491 
492         priv->td0_pool_dma = priv->rd1_pool_dma +
493                 priv->opts.rx_descs1 * sizeof(struct vnt_rx_desc);
494 
495         priv->td1_pool_dma = priv->td0_pool_dma +
496                 priv->opts.tx_descs[0] * sizeof(struct vnt_tx_desc);
497 
498         /* vir_pool: pvoid type */
499         priv->apTD0Rings = vir_pool
500                 + priv->opts.rx_descs0 * sizeof(struct vnt_rx_desc)
501                 + priv->opts.rx_descs1 * sizeof(struct vnt_rx_desc);
502 
503         priv->apTD1Rings = vir_pool
504                 + priv->opts.rx_descs0 * sizeof(struct vnt_rx_desc)
505                 + priv->opts.rx_descs1 * sizeof(struct vnt_rx_desc)
506                 + priv->opts.tx_descs[0] * sizeof(struct vnt_tx_desc);
507 
508         priv->tx1_bufs = priv->tx0_bufs +
509                 priv->opts.tx_descs[0] * PKT_BUF_SZ;
510 
511         priv->tx_beacon_bufs = priv->tx1_bufs +
512                 priv->opts.tx_descs[1] * PKT_BUF_SZ;
513 
514         priv->pbyTmpBuff = priv->tx_beacon_bufs +
515                 CB_BEACON_BUF_SIZE;
516 
517         priv->tx_bufs_dma1 = priv->tx_bufs_dma0 +
518                 priv->opts.tx_descs[0] * PKT_BUF_SZ;
519 
520         priv->tx_beacon_dma = priv->tx_bufs_dma1 +
521                 priv->opts.tx_descs[1] * PKT_BUF_SZ;
522 
523         return true;
524 }
525 
526 static void device_free_rings(struct vnt_private *priv)
527 {
528         dma_free_coherent(&priv->pcid->dev,
529                           priv->opts.rx_descs0 * sizeof(struct vnt_rx_desc) +
530                           priv->opts.rx_descs1 * sizeof(struct vnt_rx_desc) +
531                           priv->opts.tx_descs[0] * sizeof(struct vnt_tx_desc) +
532                           priv->opts.tx_descs[1] * sizeof(struct vnt_tx_desc),
533                           priv->aRD0Ring, priv->pool_dma);
534 
535         if (priv->tx0_bufs)
536                 dma_free_coherent(&priv->pcid->dev,
537                                   priv->opts.tx_descs[0] * PKT_BUF_SZ +
538                                   priv->opts.tx_descs[1] * PKT_BUF_SZ +
539                                   CB_BEACON_BUF_SIZE +
540                                   CB_MAX_BUF_SIZE,
541                                   priv->tx0_bufs, priv->tx_bufs_dma0);
542 }
543 
544 static void device_init_rd0_ring(struct vnt_private *priv)
545 {
546         int i;
547         dma_addr_t      curr = priv->rd0_pool_dma;
548         struct vnt_rx_desc *desc;
549 
550         /* Init the RD0 ring entries */
551         for (i = 0; i < priv->opts.rx_descs0;
552              i ++, curr += sizeof(struct vnt_rx_desc)) {
553                 desc = &priv->aRD0Ring[i];
554                 desc->rd_info = kzalloc(sizeof(*desc->rd_info), GFP_ATOMIC);
555 
556                 if (!device_alloc_rx_buf(priv, desc))
557                         dev_err(&priv->pcid->dev, "can not alloc rx bufs\n");
558 
559                 desc->next = &(priv->aRD0Ring[(i+1) % priv->opts.rx_descs0]);
560                 desc->next_desc = cpu_to_le32(curr + sizeof(struct vnt_rx_desc));
561         }
562 
563         if (i > 0)
564                 priv->aRD0Ring[i-1].next_desc = cpu_to_le32(priv->rd0_pool_dma);
565         priv->pCurrRD[0] = &priv->aRD0Ring[0];
566 }
567 
568 static void device_init_rd1_ring(struct vnt_private *priv)
569 {
570         int i;
571         dma_addr_t      curr = priv->rd1_pool_dma;
572         struct vnt_rx_desc *desc;
573 
574         /* Init the RD1 ring entries */
575         for (i = 0; i < priv->opts.rx_descs1;
576              i ++, curr += sizeof(struct vnt_rx_desc)) {
577                 desc = &priv->aRD1Ring[i];
578                 desc->rd_info = kzalloc(sizeof(*desc->rd_info), GFP_ATOMIC);
579 
580                 if (!device_alloc_rx_buf(priv, desc))
581                         dev_err(&priv->pcid->dev, "can not alloc rx bufs\n");
582 
583                 desc->next = &(priv->aRD1Ring[(i+1) % priv->opts.rx_descs1]);
584                 desc->next_desc = cpu_to_le32(curr + sizeof(struct vnt_rx_desc));
585         }
586 
587         if (i > 0)
588                 priv->aRD1Ring[i-1].next_desc = cpu_to_le32(priv->rd1_pool_dma);
589         priv->pCurrRD[1] = &priv->aRD1Ring[0];
590 }
591 
592 static void device_free_rd0_ring(struct vnt_private *priv)
593 {
594         int i;
595 
596         for (i = 0; i < priv->opts.rx_descs0; i++) {
597                 struct vnt_rx_desc *desc = &(priv->aRD0Ring[i]);
598                 struct vnt_rd_info *rd_info = desc->rd_info;
599 
600                 dma_unmap_single(&priv->pcid->dev, rd_info->skb_dma,
601                                  priv->rx_buf_sz, DMA_FROM_DEVICE);
602 
603                 dev_kfree_skb(rd_info->skb);
604 
605                 kfree(desc->rd_info);
606         }
607 }
608 
609 static void device_free_rd1_ring(struct vnt_private *priv)
610 {
611         int i;
612 
613         for (i = 0; i < priv->opts.rx_descs1; i++) {
614                 struct vnt_rx_desc *desc = &priv->aRD1Ring[i];
615                 struct vnt_rd_info *rd_info = desc->rd_info;
616 
617                 dma_unmap_single(&priv->pcid->dev, rd_info->skb_dma,
618                                  priv->rx_buf_sz, DMA_FROM_DEVICE);
619 
620                 dev_kfree_skb(rd_info->skb);
621 
622                 kfree(desc->rd_info);
623         }
624 }
625 
626 static void device_init_td0_ring(struct vnt_private *priv)
627 {
628         int i;
629         dma_addr_t  curr;
630         struct vnt_tx_desc *desc;
631 
632         curr = priv->td0_pool_dma;
633         for (i = 0; i < priv->opts.tx_descs[0];
634              i++, curr += sizeof(struct vnt_tx_desc)) {
635                 desc = &priv->apTD0Rings[i];
636                 desc->td_info = kzalloc(sizeof(*desc->td_info), GFP_ATOMIC);
637 
638                 desc->td_info->buf = priv->tx0_bufs + i * PKT_BUF_SZ;
639                 desc->td_info->buf_dma = priv->tx_bufs_dma0 + i * PKT_BUF_SZ;
640 
641                 desc->next = &(priv->apTD0Rings[(i+1) % priv->opts.tx_descs[0]]);
642                 desc->next_desc = cpu_to_le32(curr + sizeof(struct vnt_tx_desc));
643         }
644 
645         if (i > 0)
646                 priv->apTD0Rings[i-1].next_desc = cpu_to_le32(priv->td0_pool_dma);
647         priv->apTailTD[0] = priv->apCurrTD[0] = &priv->apTD0Rings[0];
648 }
649 
650 static void device_init_td1_ring(struct vnt_private *priv)
651 {
652         int i;
653         dma_addr_t  curr;
654         struct vnt_tx_desc *desc;
655 
656         /* Init the TD ring entries */
657         curr = priv->td1_pool_dma;
658         for (i = 0; i < priv->opts.tx_descs[1];
659              i++, curr += sizeof(struct vnt_tx_desc)) {
660                 desc = &priv->apTD1Rings[i];
661                 desc->td_info = kzalloc(sizeof(*desc->td_info), GFP_ATOMIC);
662 
663                 desc->td_info->buf = priv->tx1_bufs + i * PKT_BUF_SZ;
664                 desc->td_info->buf_dma = priv->tx_bufs_dma1 + i * PKT_BUF_SZ;
665 
666                 desc->next = &(priv->apTD1Rings[(i + 1) % priv->opts.tx_descs[1]]);
667                 desc->next_desc = cpu_to_le32(curr + sizeof(struct vnt_tx_desc));
668         }
669 
670         if (i > 0)
671                 priv->apTD1Rings[i-1].next_desc = cpu_to_le32(priv->td1_pool_dma);
672         priv->apTailTD[1] = priv->apCurrTD[1] = &priv->apTD1Rings[0];
673 }
674 
675 static void device_free_td0_ring(struct vnt_private *priv)
676 {
677         int i;
678 
679         for (i = 0; i < priv->opts.tx_descs[0]; i++) {
680                 struct vnt_tx_desc *desc = &priv->apTD0Rings[i];
681                 struct vnt_td_info *td_info = desc->td_info;
682 
683                 dev_kfree_skb(td_info->skb);
684                 kfree(desc->td_info);
685         }
686 }
687 
688 static void device_free_td1_ring(struct vnt_private *priv)
689 {
690         int i;
691 
692         for (i = 0; i < priv->opts.tx_descs[1]; i++) {
693                 struct vnt_tx_desc *desc = &priv->apTD1Rings[i];
694                 struct vnt_td_info *td_info = desc->td_info;
695 
696                 dev_kfree_skb(td_info->skb);
697                 kfree(desc->td_info);
698         }
699 }
700 
701 /*-----------------------------------------------------------------*/
702 
703 static int device_rx_srv(struct vnt_private *priv, unsigned int idx)
704 {
705         struct vnt_rx_desc *rd;
706         int works = 0;
707 
708         for (rd = priv->pCurrRD[idx];
709              rd->rd0.owner == OWNED_BY_HOST;
710              rd = rd->next) {
711                 if (works++ > 15)
712                         break;
713 
714                 if (!rd->rd_info->skb)
715                         break;
716 
717                 if (vnt_receive_frame(priv, rd)) {
718                         if (!device_alloc_rx_buf(priv, rd)) {
719                                 dev_err(&priv->pcid->dev,
720                                         "can not allocate rx buf\n");
721                                 break;
722                         }
723                 }
724                 rd->rd0.owner = OWNED_BY_NIC;
725         }
726 
727         priv->pCurrRD[idx] = rd;
728 
729         return works;
730 }
731 
732 static bool device_alloc_rx_buf(struct vnt_private *priv,
733                                 struct vnt_rx_desc *rd)
734 {
735         struct vnt_rd_info *rd_info = rd->rd_info;
736 
737         rd_info->skb = dev_alloc_skb((int)priv->rx_buf_sz);
738         if (rd_info->skb == NULL)
739                 return false;
740 
741         rd_info->skb_dma =
742                 dma_map_single(&priv->pcid->dev,
743                                skb_put(rd_info->skb, skb_tailroom(rd_info->skb)),
744                                priv->rx_buf_sz, DMA_FROM_DEVICE);
745 
746         *((unsigned int *)&rd->rd0) = 0; /* FIX cast */
747 
748         rd->rd0.res_count = cpu_to_le16(priv->rx_buf_sz);
749         rd->rd0.owner = OWNED_BY_NIC;
750         rd->rd1.req_count = cpu_to_le16(priv->rx_buf_sz);
751         rd->buff_addr = cpu_to_le32(rd_info->skb_dma);
752 
753         return true;
754 }
755 
756 static const u8 fallback_rate0[5][5] = {
757         {RATE_18M, RATE_18M, RATE_12M, RATE_12M, RATE_12M},
758         {RATE_24M, RATE_24M, RATE_18M, RATE_12M, RATE_12M},
759         {RATE_36M, RATE_36M, RATE_24M, RATE_18M, RATE_18M},
760         {RATE_48M, RATE_48M, RATE_36M, RATE_24M, RATE_24M},
761         {RATE_54M, RATE_54M, RATE_48M, RATE_36M, RATE_36M}
762 };
763 
764 static const u8 fallback_rate1[5][5] = {
765         {RATE_18M, RATE_18M, RATE_12M, RATE_6M, RATE_6M},
766         {RATE_24M, RATE_24M, RATE_18M, RATE_6M, RATE_6M},
767         {RATE_36M, RATE_36M, RATE_24M, RATE_12M, RATE_12M},
768         {RATE_48M, RATE_48M, RATE_24M, RATE_12M, RATE_12M},
769         {RATE_54M, RATE_54M, RATE_36M, RATE_18M, RATE_18M}
770 };
771 
772 static int vnt_int_report_rate(struct vnt_private *priv,
773                                struct vnt_td_info *context, u8 tsr0, u8 tsr1)
774 {
775         struct vnt_tx_fifo_head *fifo_head;
776         struct ieee80211_tx_info *info;
777         struct ieee80211_rate *rate;
778         u16 fb_option;
779         u8 tx_retry = (tsr0 & TSR0_NCR);
780         s8 idx;
781 
782         if (!context)
783                 return -ENOMEM;
784 
785         if (!context->skb)
786                 return -EINVAL;
787 
788         fifo_head = (struct vnt_tx_fifo_head *)context->buf;
789         fb_option = (le16_to_cpu(fifo_head->fifo_ctl) &
790                         (FIFOCTL_AUTO_FB_0 | FIFOCTL_AUTO_FB_1));
791 
792         info = IEEE80211_SKB_CB(context->skb);
793         idx = info->control.rates[0].idx;
794 
795         if (fb_option && !(tsr1 & TSR1_TERR)) {
796                 u8 tx_rate;
797                 u8 retry = tx_retry;
798 
799                 rate = ieee80211_get_tx_rate(priv->hw, info);
800                 tx_rate = rate->hw_value - RATE_18M;
801 
802                 if (retry > 4)
803                         retry = 4;
804 
805                 if (fb_option & FIFOCTL_AUTO_FB_0)
806                         tx_rate = fallback_rate0[tx_rate][retry];
807                 else if (fb_option & FIFOCTL_AUTO_FB_1)
808                         tx_rate = fallback_rate1[tx_rate][retry];
809 
810                 if (info->band == IEEE80211_BAND_5GHZ)
811                         idx = tx_rate - RATE_6M;
812                 else
813                         idx = tx_rate;
814         }
815 
816         ieee80211_tx_info_clear_status(info);
817 
818         info->status.rates[0].count = tx_retry;
819 
820         if (!(tsr1 & TSR1_TERR)) {
821                 info->status.rates[0].idx = idx;
822 
823                 if (info->flags & IEEE80211_TX_CTL_NO_ACK)
824                         info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
825                 else
826                         info->flags |= IEEE80211_TX_STAT_ACK;
827         }
828 
829         return 0;
830 }
831 
832 static int device_tx_srv(struct vnt_private *priv, unsigned int idx)
833 {
834         struct vnt_tx_desc *desc;
835         int                      works = 0;
836         unsigned char byTsr0;
837         unsigned char byTsr1;
838 
839         for (desc = priv->apTailTD[idx]; priv->iTDUsed[idx] > 0; desc = desc->next) {
840                 if (desc->td0.owner == OWNED_BY_NIC)
841                         break;
842                 if (works++ > 15)
843                         break;
844 
845                 byTsr0 = desc->td0.tsr0;
846                 byTsr1 = desc->td0.tsr1;
847 
848                 /* Only the status of first TD in the chain is correct */
849                 if (desc->td1.tcr & TCR_STP) {
850                         if ((desc->td_info->flags & TD_FLAGS_NETIF_SKB) != 0) {
851                                 if (!(byTsr1 & TSR1_TERR)) {
852                                         if (byTsr0 != 0) {
853                                                 pr_debug(" Tx[%d] OK but has error. tsr1[%02X] tsr0[%02X]\n",
854                                                          (int)idx, byTsr1,
855                                                          byTsr0);
856                                         }
857                                 } else {
858                                         pr_debug(" Tx[%d] dropped & tsr1[%02X] tsr0[%02X]\n",
859                                                  (int)idx, byTsr1, byTsr0);
860                                 }
861                         }
862 
863                         if (byTsr1 & TSR1_TERR) {
864                                 if ((desc->td_info->flags & TD_FLAGS_PRIV_SKB) != 0) {
865                                         pr_debug(" Tx[%d] fail has error. tsr1[%02X] tsr0[%02X]\n",
866                                                  (int)idx, byTsr1, byTsr0);
867                                 }
868                         }
869 
870                         vnt_int_report_rate(priv, desc->td_info, byTsr0, byTsr1);
871 
872                         device_free_tx_buf(priv, desc);
873                         priv->iTDUsed[idx]--;
874                 }
875         }
876 
877         priv->apTailTD[idx] = desc;
878 
879         return works;
880 }
881 
882 static void device_error(struct vnt_private *priv, unsigned short status)
883 {
884         if (status & ISR_FETALERR) {
885                 dev_err(&priv->pcid->dev, "Hardware fatal error\n");
886 
887                 MACbShutdown(priv->PortOffset);
888                 return;
889         }
890 }
891 
892 static void device_free_tx_buf(struct vnt_private *priv,
893                                struct vnt_tx_desc *desc)
894 {
895         struct vnt_td_info *td_info = desc->td_info;
896         struct sk_buff *skb = td_info->skb;
897 
898         if (skb)
899                 ieee80211_tx_status_irqsafe(priv->hw, skb);
900 
901         td_info->skb = NULL;
902         td_info->flags = 0;
903 }
904 
905 static void vnt_check_bb_vga(struct vnt_private *priv)
906 {
907         long dbm;
908         int i;
909 
910         if (!priv->bUpdateBBVGA)
911                 return;
912 
913         if (priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
914                 return;
915 
916         if (!(priv->vif->bss_conf.assoc && priv->uCurrRSSI))
917                 return;
918 
919         RFvRSSITodBm(priv, (u8)priv->uCurrRSSI, &dbm);
920 
921         for (i = 0; i < BB_VGA_LEVEL; i++) {
922                 if (dbm < priv->ldBmThreshold[i]) {
923                         priv->byBBVGANew = priv->abyBBVGA[i];
924                         break;
925                 }
926         }
927 
928         if (priv->byBBVGANew == priv->byBBVGACurrent) {
929                 priv->uBBVGADiffCount = 1;
930                 return;
931         }
932 
933         priv->uBBVGADiffCount++;
934 
935         if (priv->uBBVGADiffCount == 1) {
936                 /* first VGA diff gain */
937                 BBvSetVGAGainOffset(priv, priv->byBBVGANew);
938 
939                 dev_dbg(&priv->pcid->dev,
940                         "First RSSI[%d] NewGain[%d] OldGain[%d] Count[%d]\n",
941                         (int)dbm, priv->byBBVGANew,
942                         priv->byBBVGACurrent,
943                         (int)priv->uBBVGADiffCount);
944         }
945 
946         if (priv->uBBVGADiffCount >= BB_VGA_CHANGE_THRESHOLD) {
947                 dev_dbg(&priv->pcid->dev,
948                         "RSSI[%d] NewGain[%d] OldGain[%d] Count[%d]\n",
949                         (int)dbm, priv->byBBVGANew,
950                         priv->byBBVGACurrent,
951                         (int)priv->uBBVGADiffCount);
952 
953                 BBvSetVGAGainOffset(priv, priv->byBBVGANew);
954         }
955 }
956 
957 static void vnt_interrupt_process(struct vnt_private *priv)
958 {
959         struct ieee80211_low_level_stats *low_stats = &priv->low_stats;
960         int             max_count = 0;
961         u32 mib_counter;
962         u32 isr;
963         unsigned long flags;
964 
965         MACvReadISR(priv->PortOffset, &isr);
966 
967         if (isr == 0)
968                 return;
969 
970         if (isr == 0xffffffff) {
971                 pr_debug("isr = 0xffff\n");
972                 return;
973         }
974 
975         MACvIntDisable(priv->PortOffset);
976 
977         spin_lock_irqsave(&priv->lock, flags);
978 
979         /* Read low level stats */
980         MACvReadMIBCounter(priv->PortOffset, &mib_counter);
981 
982         low_stats->dot11RTSSuccessCount += mib_counter & 0xff;
983         low_stats->dot11RTSFailureCount += (mib_counter >> 8) & 0xff;
984         low_stats->dot11ACKFailureCount += (mib_counter >> 16) & 0xff;
985         low_stats->dot11FCSErrorCount += (mib_counter >> 24) & 0xff;
986 
987         /*
988          * TBD....
989          * Must do this after doing rx/tx, cause ISR bit is slow
990          * than RD/TD write back
991          * update ISR counter
992          */
993         while (isr && priv->vif) {
994                 MACvWriteISR(priv->PortOffset, isr);
995 
996                 if (isr & ISR_FETALERR) {
997                         pr_debug(" ISR_FETALERR\n");
998                         VNSvOutPortB(priv->PortOffset + MAC_REG_SOFTPWRCTL, 0);
999                         VNSvOutPortW(priv->PortOffset +
1000                                      MAC_REG_SOFTPWRCTL, SOFTPWRCTL_SWPECTI);
1001                         device_error(priv, isr);
1002                 }
1003 
1004                 if (isr & ISR_TBTT) {
1005                         if (priv->op_mode != NL80211_IFTYPE_ADHOC)
1006                                 vnt_check_bb_vga(priv);
1007 
1008                         priv->bBeaconSent = false;
1009                         if (priv->bEnablePSMode)
1010                                 PSbIsNextTBTTWakeUp((void *)priv);
1011 
1012                         if ((priv->op_mode == NL80211_IFTYPE_AP ||
1013                             priv->op_mode == NL80211_IFTYPE_ADHOC) &&
1014                             priv->vif->bss_conf.enable_beacon) {
1015                                 MACvOneShotTimer1MicroSec(priv->PortOffset,
1016                                                           (priv->vif->bss_conf.beacon_int - MAKE_BEACON_RESERVED) << 10);
1017                         }
1018 
1019                         /* TODO: adhoc PS mode */
1020 
1021                 }
1022 
1023                 if (isr & ISR_BNTX) {
1024                         if (priv->op_mode == NL80211_IFTYPE_ADHOC) {
1025                                 priv->bIsBeaconBufReadySet = false;
1026                                 priv->cbBeaconBufReadySetCnt = 0;
1027                         }
1028 
1029                         priv->bBeaconSent = true;
1030                 }
1031 
1032                 if (isr & ISR_RXDMA0)
1033                         max_count += device_rx_srv(priv, TYPE_RXDMA0);
1034 
1035                 if (isr & ISR_RXDMA1)
1036                         max_count += device_rx_srv(priv, TYPE_RXDMA1);
1037 
1038                 if (isr & ISR_TXDMA0)
1039                         max_count += device_tx_srv(priv, TYPE_TXDMA0);
1040 
1041                 if (isr & ISR_AC0DMA)
1042                         max_count += device_tx_srv(priv, TYPE_AC0DMA);
1043 
1044                 if (isr & ISR_SOFTTIMER1) {
1045                         if (priv->vif->bss_conf.enable_beacon)
1046                                 vnt_beacon_make(priv, priv->vif);
1047                 }
1048 
1049                 /* If both buffers available wake the queue */
1050                 if (AVAIL_TD(priv, TYPE_TXDMA0) &&
1051                     AVAIL_TD(priv, TYPE_AC0DMA) &&
1052                     ieee80211_queue_stopped(priv->hw, 0))
1053                         ieee80211_wake_queues(priv->hw);
1054 
1055                 MACvReadISR(priv->PortOffset, &isr);
1056 
1057                 MACvReceive0(priv->PortOffset);
1058                 MACvReceive1(priv->PortOffset);
1059 
1060                 if (max_count > priv->opts.int_works)
1061                         break;
1062         }
1063 
1064         spin_unlock_irqrestore(&priv->lock, flags);
1065 
1066         MACvIntEnable(priv->PortOffset, IMR_MASK_VALUE);
1067 }
1068 
1069 static void vnt_interrupt_work(struct work_struct *work)
1070 {
1071         struct vnt_private *priv =
1072                 container_of(work, struct vnt_private, interrupt_work);
1073 
1074         if (priv->vif)
1075                 vnt_interrupt_process(priv);
1076 }
1077 
1078 static irqreturn_t vnt_interrupt(int irq,  void *arg)
1079 {
1080         struct vnt_private *priv = arg;
1081 
1082         if (priv->vif)
1083                 schedule_work(&priv->interrupt_work);
1084 
1085         return IRQ_HANDLED;
1086 }
1087 
1088 static int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
1089 {
1090         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1091         struct vnt_tx_desc *head_td;
1092         u32 dma_idx;
1093         unsigned long flags;
1094 
1095         spin_lock_irqsave(&priv->lock, flags);
1096 
1097         if (ieee80211_is_data(hdr->frame_control))
1098                 dma_idx = TYPE_AC0DMA;
1099         else
1100                 dma_idx = TYPE_TXDMA0;
1101 
1102         if (AVAIL_TD(priv, dma_idx) < 1) {
1103                 spin_unlock_irqrestore(&priv->lock, flags);
1104                 ieee80211_stop_queues(priv->hw);
1105                 return -ENOMEM;
1106         }
1107 
1108         head_td = priv->apCurrTD[dma_idx];
1109 
1110         head_td->td1.tcr = 0;
1111 
1112         head_td->td_info->skb = skb;
1113 
1114         if (dma_idx == TYPE_AC0DMA)
1115                 head_td->td_info->flags = TD_FLAGS_NETIF_SKB;
1116 
1117         priv->apCurrTD[dma_idx] = head_td->next;
1118 
1119         spin_unlock_irqrestore(&priv->lock, flags);
1120 
1121         vnt_generate_fifo_header(priv, dma_idx, head_td, skb);
1122 
1123         spin_lock_irqsave(&priv->lock, flags);
1124 
1125         priv->bPWBitOn = false;
1126 
1127         /* Set TSR1 & ReqCount in TxDescHead */
1128         head_td->td1.tcr |= (TCR_STP | TCR_EDP | EDMSDU);
1129         head_td->td1.req_count = cpu_to_le16(head_td->td_info->req_count);
1130 
1131         head_td->buff_addr = cpu_to_le32(head_td->td_info->buf_dma);
1132 
1133         /* Poll Transmit the adapter */
1134         wmb();
1135         head_td->td0.owner = OWNED_BY_NIC;
1136         wmb(); /* second memory barrier */
1137 
1138         if (head_td->td_info->flags & TD_FLAGS_NETIF_SKB)
1139                 MACvTransmitAC0(priv->PortOffset);
1140         else
1141                 MACvTransmit0(priv->PortOffset);
1142 
1143         priv->iTDUsed[dma_idx]++;
1144 
1145         spin_unlock_irqrestore(&priv->lock, flags);
1146 
1147         return 0;
1148 }
1149 
1150 static void vnt_tx_80211(struct ieee80211_hw *hw,
1151                          struct ieee80211_tx_control *control,
1152                          struct sk_buff *skb)
1153 {
1154         struct vnt_private *priv = hw->priv;
1155 
1156         if (vnt_tx_packet(priv, skb))
1157                 ieee80211_free_txskb(hw, skb);
1158 }
1159 
1160 static int vnt_start(struct ieee80211_hw *hw)
1161 {
1162         struct vnt_private *priv = hw->priv;
1163         int ret;
1164 
1165         priv->rx_buf_sz = PKT_BUF_SZ;
1166         if (!device_init_rings(priv))
1167                 return -ENOMEM;
1168 
1169         ret = request_irq(priv->pcid->irq, &vnt_interrupt,
1170                           IRQF_SHARED, "vt6655", priv);
1171         if (ret) {
1172                 dev_dbg(&priv->pcid->dev, "failed to start irq\n");
1173                 return ret;
1174         }
1175 
1176         dev_dbg(&priv->pcid->dev, "call device init rd0 ring\n");
1177         device_init_rd0_ring(priv);
1178         device_init_rd1_ring(priv);
1179         device_init_td0_ring(priv);
1180         device_init_td1_ring(priv);
1181 
1182         device_init_registers(priv);
1183 
1184         dev_dbg(&priv->pcid->dev, "call MACvIntEnable\n");
1185         MACvIntEnable(priv->PortOffset, IMR_MASK_VALUE);
1186 
1187         ieee80211_wake_queues(hw);
1188 
1189         return 0;
1190 }
1191 
1192 static void vnt_stop(struct ieee80211_hw *hw)
1193 {
1194         struct vnt_private *priv = hw->priv;
1195 
1196         ieee80211_stop_queues(hw);
1197 
1198         cancel_work_sync(&priv->interrupt_work);
1199 
1200         MACbShutdown(priv->PortOffset);
1201         MACbSoftwareReset(priv->PortOffset);
1202         CARDbRadioPowerOff(priv);
1203 
1204         device_free_td0_ring(priv);
1205         device_free_td1_ring(priv);
1206         device_free_rd0_ring(priv);
1207         device_free_rd1_ring(priv);
1208         device_free_rings(priv);
1209 
1210         free_irq(priv->pcid->irq, priv);
1211 }
1212 
1213 static int vnt_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1214 {
1215         struct vnt_private *priv = hw->priv;
1216 
1217         priv->vif = vif;
1218 
1219         switch (vif->type) {
1220         case NL80211_IFTYPE_STATION:
1221                 break;
1222         case NL80211_IFTYPE_ADHOC:
1223                 MACvRegBitsOff(priv->PortOffset, MAC_REG_RCR, RCR_UNICAST);
1224 
1225                 MACvRegBitsOn(priv->PortOffset, MAC_REG_HOSTCR, HOSTCR_ADHOC);
1226 
1227                 break;
1228         case NL80211_IFTYPE_AP:
1229                 MACvRegBitsOff(priv->PortOffset, MAC_REG_RCR, RCR_UNICAST);
1230 
1231                 MACvRegBitsOn(priv->PortOffset, MAC_REG_HOSTCR, HOSTCR_AP);
1232 
1233                 break;
1234         default:
1235                 return -EOPNOTSUPP;
1236         }
1237 
1238         priv->op_mode = vif->type;
1239 
1240         return 0;
1241 }
1242 
1243 static void vnt_remove_interface(struct ieee80211_hw *hw,
1244                                  struct ieee80211_vif *vif)
1245 {
1246         struct vnt_private *priv = hw->priv;
1247 
1248         switch (vif->type) {
1249         case NL80211_IFTYPE_STATION:
1250                 break;
1251         case NL80211_IFTYPE_ADHOC:
1252                 MACvRegBitsOff(priv->PortOffset, MAC_REG_TCR, TCR_AUTOBCNTX);
1253                 MACvRegBitsOff(priv->PortOffset,
1254                                MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1255                 MACvRegBitsOff(priv->PortOffset, MAC_REG_HOSTCR, HOSTCR_ADHOC);
1256                 break;
1257         case NL80211_IFTYPE_AP:
1258                 MACvRegBitsOff(priv->PortOffset, MAC_REG_TCR, TCR_AUTOBCNTX);
1259                 MACvRegBitsOff(priv->PortOffset,
1260                                MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1261                 MACvRegBitsOff(priv->PortOffset, MAC_REG_HOSTCR, HOSTCR_AP);
1262                 break;
1263         default:
1264                 break;
1265         }
1266 
1267         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
1268 }
1269 
1270 
1271 static int vnt_config(struct ieee80211_hw *hw, u32 changed)
1272 {
1273         struct vnt_private *priv = hw->priv;
1274         struct ieee80211_conf *conf = &hw->conf;
1275         u8 bb_type;
1276 
1277         if (changed & IEEE80211_CONF_CHANGE_PS) {
1278                 if (conf->flags & IEEE80211_CONF_PS)
1279                         PSvEnablePowerSaving(priv, conf->listen_interval);
1280                 else
1281                         PSvDisablePowerSaving(priv);
1282         }
1283 
1284         if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) ||
1285             (conf->flags & IEEE80211_CONF_OFFCHANNEL)) {
1286                 set_channel(priv, conf->chandef.chan);
1287 
1288                 if (conf->chandef.chan->band == IEEE80211_BAND_5GHZ)
1289                         bb_type = BB_TYPE_11A;
1290                 else
1291                         bb_type = BB_TYPE_11G;
1292 
1293                 if (priv->byBBType != bb_type) {
1294                         priv->byBBType = bb_type;
1295 
1296                         CARDbSetPhyParameter(priv, priv->byBBType);
1297                 }
1298         }
1299 
1300         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1301                 if (priv->byBBType == BB_TYPE_11B)
1302                         priv->wCurrentRate = RATE_1M;
1303                 else
1304                         priv->wCurrentRate = RATE_54M;
1305 
1306                 RFbSetPower(priv, priv->wCurrentRate,
1307                             conf->chandef.chan->hw_value);
1308         }
1309 
1310         return 0;
1311 }
1312 
1313 static void vnt_bss_info_changed(struct ieee80211_hw *hw,
1314                 struct ieee80211_vif *vif, struct ieee80211_bss_conf *conf,
1315                 u32 changed)
1316 {
1317         struct vnt_private *priv = hw->priv;
1318 
1319         priv->current_aid = conf->aid;
1320 
1321         if (changed & BSS_CHANGED_BSSID && conf->bssid) {
1322                 unsigned long flags;
1323 
1324                 spin_lock_irqsave(&priv->lock, flags);
1325 
1326                 MACvWriteBSSIDAddress(priv->PortOffset, (u8 *)conf->bssid);
1327 
1328                 spin_unlock_irqrestore(&priv->lock, flags);
1329         }
1330 
1331         if (changed & BSS_CHANGED_BASIC_RATES) {
1332                 priv->basic_rates = conf->basic_rates;
1333 
1334                 CARDvUpdateBasicTopRate(priv);
1335 
1336                 dev_dbg(&priv->pcid->dev,
1337                         "basic rates %x\n", conf->basic_rates);
1338         }
1339 
1340         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1341                 if (conf->use_short_preamble) {
1342                         MACvEnableBarkerPreambleMd(priv->PortOffset);
1343                         priv->byPreambleType = true;
1344                 } else {
1345                         MACvDisableBarkerPreambleMd(priv->PortOffset);
1346                         priv->byPreambleType = false;
1347                 }
1348         }
1349 
1350         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1351                 if (conf->use_cts_prot)
1352                         MACvEnableProtectMD(priv->PortOffset);
1353                 else
1354                         MACvDisableProtectMD(priv->PortOffset);
1355         }
1356 
1357         if (changed & BSS_CHANGED_ERP_SLOT) {
1358                 if (conf->use_short_slot)
1359                         priv->bShortSlotTime = true;
1360                 else
1361                         priv->bShortSlotTime = false;
1362 
1363                 CARDbSetPhyParameter(priv, priv->byBBType);
1364                 BBvSetVGAGainOffset(priv, priv->abyBBVGA[0]);
1365         }
1366 
1367         if (changed & BSS_CHANGED_TXPOWER)
1368                 RFbSetPower(priv, priv->wCurrentRate,
1369                             conf->chandef.chan->hw_value);
1370 
1371         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1372                 dev_dbg(&priv->pcid->dev,
1373                         "Beacon enable %d\n", conf->enable_beacon);
1374 
1375                 if (conf->enable_beacon) {
1376                         vnt_beacon_enable(priv, vif, conf);
1377 
1378                         MACvRegBitsOn(priv->PortOffset, MAC_REG_TCR,
1379                                       TCR_AUTOBCNTX);
1380                 } else {
1381                         MACvRegBitsOff(priv->PortOffset, MAC_REG_TCR,
1382                                        TCR_AUTOBCNTX);
1383                 }
1384         }
1385 
1386         if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INFO) &&
1387             priv->op_mode != NL80211_IFTYPE_AP) {
1388                 if (conf->assoc && conf->beacon_rate) {
1389                         CARDbUpdateTSF(priv, conf->beacon_rate->hw_value,
1390                                        conf->sync_tsf);
1391 
1392                         CARDbSetBeaconPeriod(priv, conf->beacon_int);
1393 
1394                         CARDvSetFirstNextTBTT(priv, conf->beacon_int);
1395                 } else {
1396                         VNSvOutPortB(priv->PortOffset + MAC_REG_TFTCTL,
1397                                      TFTCTL_TSFCNTRST);
1398                         VNSvOutPortB(priv->PortOffset + MAC_REG_TFTCTL,
1399                                      TFTCTL_TSFCNTREN);
1400                 }
1401         }
1402 }
1403 
1404 static u64 vnt_prepare_multicast(struct ieee80211_hw *hw,
1405         struct netdev_hw_addr_list *mc_list)
1406 {
1407         struct vnt_private *priv = hw->priv;
1408         struct netdev_hw_addr *ha;
1409         u64 mc_filter = 0;
1410         u32 bit_nr = 0;
1411 
1412         netdev_hw_addr_list_for_each(ha, mc_list) {
1413                 bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
1414 
1415                 mc_filter |= 1ULL << (bit_nr & 0x3f);
1416         }
1417 
1418         priv->mc_list_count = mc_list->count;
1419 
1420         return mc_filter;
1421 }
1422 
1423 static void vnt_configure(struct ieee80211_hw *hw,
1424         unsigned int changed_flags, unsigned int *total_flags, u64 multicast)
1425 {
1426         struct vnt_private *priv = hw->priv;
1427         u8 rx_mode = 0;
1428 
1429         *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC;
1430 
1431         VNSvInPortB(priv->PortOffset + MAC_REG_RCR, &rx_mode);
1432 
1433         dev_dbg(&priv->pcid->dev, "rx mode in = %x\n", rx_mode);
1434 
1435         if (changed_flags & FIF_ALLMULTI) {
1436                 if (*total_flags & FIF_ALLMULTI) {
1437                         unsigned long flags;
1438 
1439                         spin_lock_irqsave(&priv->lock, flags);
1440 
1441                         if (priv->mc_list_count > 2) {
1442                                 MACvSelectPage1(priv->PortOffset);
1443 
1444                                 VNSvOutPortD(priv->PortOffset +
1445                                              MAC_REG_MAR0, 0xffffffff);
1446                                 VNSvOutPortD(priv->PortOffset +
1447                                             MAC_REG_MAR0 + 4, 0xffffffff);
1448 
1449                                 MACvSelectPage0(priv->PortOffset);
1450                         } else {
1451                                 MACvSelectPage1(priv->PortOffset);
1452 
1453                                 VNSvOutPortD(priv->PortOffset +
1454                                              MAC_REG_MAR0, (u32)multicast);
1455                                 VNSvOutPortD(priv->PortOffset +
1456                                              MAC_REG_MAR0 + 4,
1457                                              (u32)(multicast >> 32));
1458 
1459                                 MACvSelectPage0(priv->PortOffset);
1460                         }
1461 
1462                         spin_unlock_irqrestore(&priv->lock, flags);
1463 
1464                         rx_mode |= RCR_MULTICAST | RCR_BROADCAST;
1465                 } else {
1466                         rx_mode &= ~(RCR_MULTICAST | RCR_BROADCAST);
1467                 }
1468         }
1469 
1470         if (changed_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC)) {
1471                 rx_mode |= RCR_MULTICAST | RCR_BROADCAST;
1472 
1473                 if (*total_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC))
1474                         rx_mode &= ~RCR_BSSID;
1475                 else
1476                         rx_mode |= RCR_BSSID;
1477         }
1478 
1479         VNSvOutPortB(priv->PortOffset + MAC_REG_RCR, rx_mode);
1480 
1481         dev_dbg(&priv->pcid->dev, "rx mode out= %x\n", rx_mode);
1482 }
1483 
1484 static int vnt_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1485         struct ieee80211_vif *vif, struct ieee80211_sta *sta,
1486                 struct ieee80211_key_conf *key)
1487 {
1488         struct vnt_private *priv = hw->priv;
1489 
1490         switch (cmd) {
1491         case SET_KEY:
1492                 if (vnt_set_keys(hw, sta, vif, key))
1493                         return -EOPNOTSUPP;
1494                 break;
1495         case DISABLE_KEY:
1496                 if (test_bit(key->hw_key_idx, &priv->key_entry_inuse))
1497                         clear_bit(key->hw_key_idx, &priv->key_entry_inuse);
1498         default:
1499                 break;
1500         }
1501 
1502         return 0;
1503 }
1504 
1505 static int vnt_get_stats(struct ieee80211_hw *hw,
1506                          struct ieee80211_low_level_stats *stats)
1507 {
1508         struct vnt_private *priv = hw->priv;
1509 
1510         memcpy(stats, &priv->low_stats, sizeof(*stats));
1511 
1512         return 0;
1513 }
1514 
1515 static u64 vnt_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1516 {
1517         struct vnt_private *priv = hw->priv;
1518         u64 tsf;
1519 
1520         CARDbGetCurrentTSF(priv, &tsf);
1521 
1522         return tsf;
1523 }
1524 
1525 static void vnt_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1526                         u64 tsf)
1527 {
1528         struct vnt_private *priv = hw->priv;
1529 
1530         CARDvUpdateNextTBTT(priv, tsf, vif->bss_conf.beacon_int);
1531 }
1532 
1533 static void vnt_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1534 {
1535         struct vnt_private *priv = hw->priv;
1536 
1537         /* reset TSF counter */
1538         VNSvOutPortB(priv->PortOffset + MAC_REG_TFTCTL, TFTCTL_TSFCNTRST);
1539 }
1540 
1541 static const struct ieee80211_ops vnt_mac_ops = {
1542         .tx                     = vnt_tx_80211,
1543         .start                  = vnt_start,
1544         .stop                   = vnt_stop,
1545         .add_interface          = vnt_add_interface,
1546         .remove_interface       = vnt_remove_interface,
1547         .config                 = vnt_config,
1548         .bss_info_changed       = vnt_bss_info_changed,
1549         .prepare_multicast      = vnt_prepare_multicast,
1550         .configure_filter       = vnt_configure,
1551         .set_key                = vnt_set_key,
1552         .get_stats              = vnt_get_stats,
1553         .get_tsf                = vnt_get_tsf,
1554         .set_tsf                = vnt_set_tsf,
1555         .reset_tsf              = vnt_reset_tsf,
1556 };
1557 
1558 static int vnt_init(struct vnt_private *priv)
1559 {
1560         SET_IEEE80211_PERM_ADDR(priv->hw, priv->abyCurrentNetAddr);
1561 
1562         vnt_init_bands(priv);
1563 
1564         if (ieee80211_register_hw(priv->hw))
1565                 return -ENODEV;
1566 
1567         priv->mac_hw = true;
1568 
1569         CARDbRadioPowerOff(priv);
1570 
1571         return 0;
1572 }
1573 
1574 static int
1575 vt6655_probe(struct pci_dev *pcid, const struct pci_device_id *ent)
1576 {
1577         struct vnt_private *priv;
1578         struct ieee80211_hw *hw;
1579         struct wiphy *wiphy;
1580         int         rc;
1581 
1582         dev_notice(&pcid->dev,
1583                    "%s Ver. %s\n", DEVICE_FULL_DRV_NAM, DEVICE_VERSION);
1584 
1585         dev_notice(&pcid->dev,
1586                    "Copyright (c) 2003 VIA Networking Technologies, Inc.\n");
1587 
1588         hw = ieee80211_alloc_hw(sizeof(*priv), &vnt_mac_ops);
1589         if (!hw) {
1590                 dev_err(&pcid->dev, "could not register ieee80211_hw\n");
1591                 return -ENOMEM;
1592         }
1593 
1594         priv = hw->priv;
1595         priv->pcid = pcid;
1596 
1597         spin_lock_init(&priv->lock);
1598 
1599         priv->hw = hw;
1600 
1601         SET_IEEE80211_DEV(priv->hw, &pcid->dev);
1602 
1603         if (pci_enable_device(pcid)) {
1604                 device_free_info(priv);
1605                 return -ENODEV;
1606         }
1607 
1608         dev_dbg(&pcid->dev,
1609                 "Before get pci_info memaddr is %x\n", priv->memaddr);
1610 
1611         pci_set_master(pcid);
1612 
1613         priv->memaddr = pci_resource_start(pcid, 0);
1614         priv->ioaddr = pci_resource_start(pcid, 1);
1615         priv->PortOffset = ioremap(priv->memaddr & PCI_BASE_ADDRESS_MEM_MASK,
1616                                    256);
1617         if (!priv->PortOffset) {
1618                 dev_err(&pcid->dev, ": Failed to IO remapping ..\n");
1619                 device_free_info(priv);
1620                 return -ENODEV;
1621         }
1622 
1623         rc = pci_request_regions(pcid, DEVICE_NAME);
1624         if (rc) {
1625                 dev_err(&pcid->dev, ": Failed to find PCI device\n");
1626                 device_free_info(priv);
1627                 return -ENODEV;
1628         }
1629 
1630         if (dma_set_mask(&pcid->dev, DMA_BIT_MASK(32))) {
1631                 dev_err(&pcid->dev, ": Failed to set dma 32 bit mask\n");
1632                 device_free_info(priv);
1633                 return -ENODEV;
1634         }
1635 
1636         INIT_WORK(&priv->interrupt_work, vnt_interrupt_work);
1637 
1638         /* do reset */
1639         if (!MACbSoftwareReset(priv->PortOffset)) {
1640                 dev_err(&pcid->dev, ": Failed to access MAC hardware..\n");
1641                 device_free_info(priv);
1642                 return -ENODEV;
1643         }
1644         /* initial to reload eeprom */
1645         MACvInitialize(priv->PortOffset);
1646         MACvReadEtherAddress(priv->PortOffset, priv->abyCurrentNetAddr);
1647 
1648         /* Get RFType */
1649         priv->byRFType = SROMbyReadEmbedded(priv->PortOffset, EEP_OFS_RFTYPE);
1650         priv->byRFType &= RF_MASK;
1651 
1652         dev_dbg(&pcid->dev, "RF Type = %x\n", priv->byRFType);
1653 
1654         device_get_options(priv);
1655         device_set_options(priv);
1656 
1657         wiphy = priv->hw->wiphy;
1658 
1659         wiphy->frag_threshold = FRAG_THRESH_DEF;
1660         wiphy->rts_threshold = RTS_THRESH_DEF;
1661         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1662                 BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP);
1663 
1664         ieee80211_hw_set(priv->hw, TIMING_BEACON_ONLY);
1665         ieee80211_hw_set(priv->hw, SIGNAL_DBM);
1666         ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1667         ieee80211_hw_set(priv->hw, REPORTS_TX_ACK_STATUS);
1668         ieee80211_hw_set(priv->hw, SUPPORTS_PS);
1669 
1670         priv->hw->max_signal = 100;
1671 
1672         if (vnt_init(priv))
1673                 return -ENODEV;
1674 
1675         device_print_info(priv);
1676         pci_set_drvdata(pcid, priv);
1677 
1678         return 0;
1679 }
1680 
1681 /*------------------------------------------------------------------*/
1682 
1683 #ifdef CONFIG_PM
1684 static int vt6655_suspend(struct pci_dev *pcid, pm_message_t state)
1685 {
1686         struct vnt_private *priv = pci_get_drvdata(pcid);
1687         unsigned long flags;
1688 
1689         spin_lock_irqsave(&priv->lock, flags);
1690 
1691         pci_save_state(pcid);
1692 
1693         MACbShutdown(priv->PortOffset);
1694 
1695         pci_disable_device(pcid);
1696         pci_set_power_state(pcid, pci_choose_state(pcid, state));
1697 
1698         spin_unlock_irqrestore(&priv->lock, flags);
1699 
1700         return 0;
1701 }
1702 
1703 static int vt6655_resume(struct pci_dev *pcid)
1704 {
1705 
1706         pci_set_power_state(pcid, PCI_D0);
1707         pci_enable_wake(pcid, PCI_D0, 0);
1708         pci_restore_state(pcid);
1709 
1710         return 0;
1711 }
1712 #endif
1713 
1714 MODULE_DEVICE_TABLE(pci, vt6655_pci_id_table);
1715 
1716 static struct pci_driver device_driver = {
1717         .name = DEVICE_NAME,
1718         .id_table = vt6655_pci_id_table,
1719         .probe = vt6655_probe,
1720         .remove = vt6655_remove,
1721 #ifdef CONFIG_PM
1722         .suspend = vt6655_suspend,
1723         .resume = vt6655_resume,
1724 #endif
1725 };
1726 
1727 module_pci_driver(device_driver);
1728 

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