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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);
215         BBvSoftwareReset(priv);
216 
217         /* Do MACbSoftwareReset in MACvInitialize */
218         MACbSoftwareReset(priv);
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);
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, priv->byShortRetryLimit);
361         MACvSetLongRetryLimit(priv, 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         if (dma_mapping_error(&priv->pcid->dev, rd_info->skb_dma)) {
746                 dev_kfree_skb(rd_info->skb);
747                 rd_info->skb = NULL;
748                 return false;
749         }
750 
751         *((unsigned int *)&rd->rd0) = 0; /* FIX cast */
752 
753         rd->rd0.res_count = cpu_to_le16(priv->rx_buf_sz);
754         rd->rd0.owner = OWNED_BY_NIC;
755         rd->rd1.req_count = cpu_to_le16(priv->rx_buf_sz);
756         rd->buff_addr = cpu_to_le32(rd_info->skb_dma);
757 
758         return true;
759 }
760 
761 static const u8 fallback_rate0[5][5] = {
762         {RATE_18M, RATE_18M, RATE_12M, RATE_12M, RATE_12M},
763         {RATE_24M, RATE_24M, RATE_18M, RATE_12M, RATE_12M},
764         {RATE_36M, RATE_36M, RATE_24M, RATE_18M, RATE_18M},
765         {RATE_48M, RATE_48M, RATE_36M, RATE_24M, RATE_24M},
766         {RATE_54M, RATE_54M, RATE_48M, RATE_36M, RATE_36M}
767 };
768 
769 static const u8 fallback_rate1[5][5] = {
770         {RATE_18M, RATE_18M, RATE_12M, RATE_6M, RATE_6M},
771         {RATE_24M, RATE_24M, RATE_18M, RATE_6M, RATE_6M},
772         {RATE_36M, RATE_36M, RATE_24M, RATE_12M, RATE_12M},
773         {RATE_48M, RATE_48M, RATE_24M, RATE_12M, RATE_12M},
774         {RATE_54M, RATE_54M, RATE_36M, RATE_18M, RATE_18M}
775 };
776 
777 static int vnt_int_report_rate(struct vnt_private *priv,
778                                struct vnt_td_info *context, u8 tsr0, u8 tsr1)
779 {
780         struct vnt_tx_fifo_head *fifo_head;
781         struct ieee80211_tx_info *info;
782         struct ieee80211_rate *rate;
783         u16 fb_option;
784         u8 tx_retry = (tsr0 & TSR0_NCR);
785         s8 idx;
786 
787         if (!context)
788                 return -ENOMEM;
789 
790         if (!context->skb)
791                 return -EINVAL;
792 
793         fifo_head = (struct vnt_tx_fifo_head *)context->buf;
794         fb_option = (le16_to_cpu(fifo_head->fifo_ctl) &
795                         (FIFOCTL_AUTO_FB_0 | FIFOCTL_AUTO_FB_1));
796 
797         info = IEEE80211_SKB_CB(context->skb);
798         idx = info->control.rates[0].idx;
799 
800         if (fb_option && !(tsr1 & TSR1_TERR)) {
801                 u8 tx_rate;
802                 u8 retry = tx_retry;
803 
804                 rate = ieee80211_get_tx_rate(priv->hw, info);
805                 tx_rate = rate->hw_value - RATE_18M;
806 
807                 if (retry > 4)
808                         retry = 4;
809 
810                 if (fb_option & FIFOCTL_AUTO_FB_0)
811                         tx_rate = fallback_rate0[tx_rate][retry];
812                 else if (fb_option & FIFOCTL_AUTO_FB_1)
813                         tx_rate = fallback_rate1[tx_rate][retry];
814 
815                 if (info->band == NL80211_BAND_5GHZ)
816                         idx = tx_rate - RATE_6M;
817                 else
818                         idx = tx_rate;
819         }
820 
821         ieee80211_tx_info_clear_status(info);
822 
823         info->status.rates[0].count = tx_retry;
824 
825         if (!(tsr1 & TSR1_TERR)) {
826                 info->status.rates[0].idx = idx;
827 
828                 if (info->flags & IEEE80211_TX_CTL_NO_ACK)
829                         info->flags |= IEEE80211_TX_STAT_NOACK_TRANSMITTED;
830                 else
831                         info->flags |= IEEE80211_TX_STAT_ACK;
832         }
833 
834         return 0;
835 }
836 
837 static int device_tx_srv(struct vnt_private *priv, unsigned int idx)
838 {
839         struct vnt_tx_desc *desc;
840         int                      works = 0;
841         unsigned char byTsr0;
842         unsigned char byTsr1;
843 
844         for (desc = priv->apTailTD[idx]; priv->iTDUsed[idx] > 0; desc = desc->next) {
845                 if (desc->td0.owner == OWNED_BY_NIC)
846                         break;
847                 if (works++ > 15)
848                         break;
849 
850                 byTsr0 = desc->td0.tsr0;
851                 byTsr1 = desc->td0.tsr1;
852 
853                 /* Only the status of first TD in the chain is correct */
854                 if (desc->td1.tcr & TCR_STP) {
855                         if ((desc->td_info->flags & TD_FLAGS_NETIF_SKB) != 0) {
856                                 if (!(byTsr1 & TSR1_TERR)) {
857                                         if (byTsr0 != 0) {
858                                                 pr_debug(" Tx[%d] OK but has error. tsr1[%02X] tsr0[%02X]\n",
859                                                          (int)idx, byTsr1,
860                                                          byTsr0);
861                                         }
862                                 } else {
863                                         pr_debug(" Tx[%d] dropped & tsr1[%02X] tsr0[%02X]\n",
864                                                  (int)idx, byTsr1, byTsr0);
865                                 }
866                         }
867 
868                         if (byTsr1 & TSR1_TERR) {
869                                 if ((desc->td_info->flags & TD_FLAGS_PRIV_SKB) != 0) {
870                                         pr_debug(" Tx[%d] fail has error. tsr1[%02X] tsr0[%02X]\n",
871                                                  (int)idx, byTsr1, byTsr0);
872                                 }
873                         }
874 
875                         vnt_int_report_rate(priv, desc->td_info, byTsr0, byTsr1);
876 
877                         device_free_tx_buf(priv, desc);
878                         priv->iTDUsed[idx]--;
879                 }
880         }
881 
882         priv->apTailTD[idx] = desc;
883 
884         return works;
885 }
886 
887 static void device_error(struct vnt_private *priv, unsigned short status)
888 {
889         if (status & ISR_FETALERR) {
890                 dev_err(&priv->pcid->dev, "Hardware fatal error\n");
891 
892                 MACbShutdown(priv);
893                 return;
894         }
895 }
896 
897 static void device_free_tx_buf(struct vnt_private *priv,
898                                struct vnt_tx_desc *desc)
899 {
900         struct vnt_td_info *td_info = desc->td_info;
901         struct sk_buff *skb = td_info->skb;
902 
903         if (skb)
904                 ieee80211_tx_status_irqsafe(priv->hw, skb);
905 
906         td_info->skb = NULL;
907         td_info->flags = 0;
908 }
909 
910 static void vnt_check_bb_vga(struct vnt_private *priv)
911 {
912         long dbm;
913         int i;
914 
915         if (!priv->bUpdateBBVGA)
916                 return;
917 
918         if (priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)
919                 return;
920 
921         if (!(priv->vif->bss_conf.assoc && priv->uCurrRSSI))
922                 return;
923 
924         RFvRSSITodBm(priv, (u8)priv->uCurrRSSI, &dbm);
925 
926         for (i = 0; i < BB_VGA_LEVEL; i++) {
927                 if (dbm < priv->ldBmThreshold[i]) {
928                         priv->byBBVGANew = priv->abyBBVGA[i];
929                         break;
930                 }
931         }
932 
933         if (priv->byBBVGANew == priv->byBBVGACurrent) {
934                 priv->uBBVGADiffCount = 1;
935                 return;
936         }
937 
938         priv->uBBVGADiffCount++;
939 
940         if (priv->uBBVGADiffCount == 1) {
941                 /* first VGA diff gain */
942                 BBvSetVGAGainOffset(priv, priv->byBBVGANew);
943 
944                 dev_dbg(&priv->pcid->dev,
945                         "First RSSI[%d] NewGain[%d] OldGain[%d] Count[%d]\n",
946                         (int)dbm, priv->byBBVGANew,
947                         priv->byBBVGACurrent,
948                         (int)priv->uBBVGADiffCount);
949         }
950 
951         if (priv->uBBVGADiffCount >= BB_VGA_CHANGE_THRESHOLD) {
952                 dev_dbg(&priv->pcid->dev,
953                         "RSSI[%d] NewGain[%d] OldGain[%d] Count[%d]\n",
954                         (int)dbm, priv->byBBVGANew,
955                         priv->byBBVGACurrent,
956                         (int)priv->uBBVGADiffCount);
957 
958                 BBvSetVGAGainOffset(priv, priv->byBBVGANew);
959         }
960 }
961 
962 static void vnt_interrupt_process(struct vnt_private *priv)
963 {
964         struct ieee80211_low_level_stats *low_stats = &priv->low_stats;
965         int             max_count = 0;
966         u32 mib_counter;
967         u32 isr;
968         unsigned long flags;
969 
970         MACvReadISR(priv->PortOffset, &isr);
971 
972         if (isr == 0)
973                 return;
974 
975         if (isr == 0xffffffff) {
976                 pr_debug("isr = 0xffff\n");
977                 return;
978         }
979 
980         MACvIntDisable(priv->PortOffset);
981 
982         spin_lock_irqsave(&priv->lock, flags);
983 
984         /* Read low level stats */
985         MACvReadMIBCounter(priv->PortOffset, &mib_counter);
986 
987         low_stats->dot11RTSSuccessCount += mib_counter & 0xff;
988         low_stats->dot11RTSFailureCount += (mib_counter >> 8) & 0xff;
989         low_stats->dot11ACKFailureCount += (mib_counter >> 16) & 0xff;
990         low_stats->dot11FCSErrorCount += (mib_counter >> 24) & 0xff;
991 
992         /*
993          * TBD....
994          * Must do this after doing rx/tx, cause ISR bit is slow
995          * than RD/TD write back
996          * update ISR counter
997          */
998         while (isr && priv->vif) {
999                 MACvWriteISR(priv->PortOffset, isr);
1000 
1001                 if (isr & ISR_FETALERR) {
1002                         pr_debug(" ISR_FETALERR\n");
1003                         VNSvOutPortB(priv->PortOffset + MAC_REG_SOFTPWRCTL, 0);
1004                         VNSvOutPortW(priv->PortOffset +
1005                                      MAC_REG_SOFTPWRCTL, SOFTPWRCTL_SWPECTI);
1006                         device_error(priv, isr);
1007                 }
1008 
1009                 if (isr & ISR_TBTT) {
1010                         if (priv->op_mode != NL80211_IFTYPE_ADHOC)
1011                                 vnt_check_bb_vga(priv);
1012 
1013                         priv->bBeaconSent = false;
1014                         if (priv->bEnablePSMode)
1015                                 PSbIsNextTBTTWakeUp((void *)priv);
1016 
1017                         if ((priv->op_mode == NL80211_IFTYPE_AP ||
1018                             priv->op_mode == NL80211_IFTYPE_ADHOC) &&
1019                             priv->vif->bss_conf.enable_beacon) {
1020                                 MACvOneShotTimer1MicroSec(priv,
1021                                                           (priv->vif->bss_conf.beacon_int - MAKE_BEACON_RESERVED) << 10);
1022                         }
1023 
1024                         /* TODO: adhoc PS mode */
1025 
1026                 }
1027 
1028                 if (isr & ISR_BNTX) {
1029                         if (priv->op_mode == NL80211_IFTYPE_ADHOC) {
1030                                 priv->bIsBeaconBufReadySet = false;
1031                                 priv->cbBeaconBufReadySetCnt = 0;
1032                         }
1033 
1034                         priv->bBeaconSent = true;
1035                 }
1036 
1037                 if (isr & ISR_RXDMA0)
1038                         max_count += device_rx_srv(priv, TYPE_RXDMA0);
1039 
1040                 if (isr & ISR_RXDMA1)
1041                         max_count += device_rx_srv(priv, TYPE_RXDMA1);
1042 
1043                 if (isr & ISR_TXDMA0)
1044                         max_count += device_tx_srv(priv, TYPE_TXDMA0);
1045 
1046                 if (isr & ISR_AC0DMA)
1047                         max_count += device_tx_srv(priv, TYPE_AC0DMA);
1048 
1049                 if (isr & ISR_SOFTTIMER1) {
1050                         if (priv->vif->bss_conf.enable_beacon)
1051                                 vnt_beacon_make(priv, priv->vif);
1052                 }
1053 
1054                 /* If both buffers available wake the queue */
1055                 if (AVAIL_TD(priv, TYPE_TXDMA0) &&
1056                     AVAIL_TD(priv, TYPE_AC0DMA) &&
1057                     ieee80211_queue_stopped(priv->hw, 0))
1058                         ieee80211_wake_queues(priv->hw);
1059 
1060                 MACvReadISR(priv->PortOffset, &isr);
1061 
1062                 MACvReceive0(priv->PortOffset);
1063                 MACvReceive1(priv->PortOffset);
1064 
1065                 if (max_count > priv->opts.int_works)
1066                         break;
1067         }
1068 
1069         spin_unlock_irqrestore(&priv->lock, flags);
1070 
1071         MACvIntEnable(priv->PortOffset, IMR_MASK_VALUE);
1072 }
1073 
1074 static void vnt_interrupt_work(struct work_struct *work)
1075 {
1076         struct vnt_private *priv =
1077                 container_of(work, struct vnt_private, interrupt_work);
1078 
1079         if (priv->vif)
1080                 vnt_interrupt_process(priv);
1081 }
1082 
1083 static irqreturn_t vnt_interrupt(int irq,  void *arg)
1084 {
1085         struct vnt_private *priv = arg;
1086 
1087         if (priv->vif)
1088                 schedule_work(&priv->interrupt_work);
1089 
1090         return IRQ_HANDLED;
1091 }
1092 
1093 static int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb)
1094 {
1095         struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
1096         struct vnt_tx_desc *head_td;
1097         u32 dma_idx;
1098         unsigned long flags;
1099 
1100         spin_lock_irqsave(&priv->lock, flags);
1101 
1102         if (ieee80211_is_data(hdr->frame_control))
1103                 dma_idx = TYPE_AC0DMA;
1104         else
1105                 dma_idx = TYPE_TXDMA0;
1106 
1107         if (AVAIL_TD(priv, dma_idx) < 1) {
1108                 spin_unlock_irqrestore(&priv->lock, flags);
1109                 ieee80211_stop_queues(priv->hw);
1110                 return -ENOMEM;
1111         }
1112 
1113         head_td = priv->apCurrTD[dma_idx];
1114 
1115         head_td->td1.tcr = 0;
1116 
1117         head_td->td_info->skb = skb;
1118 
1119         if (dma_idx == TYPE_AC0DMA)
1120                 head_td->td_info->flags = TD_FLAGS_NETIF_SKB;
1121 
1122         priv->apCurrTD[dma_idx] = head_td->next;
1123 
1124         spin_unlock_irqrestore(&priv->lock, flags);
1125 
1126         vnt_generate_fifo_header(priv, dma_idx, head_td, skb);
1127 
1128         spin_lock_irqsave(&priv->lock, flags);
1129 
1130         priv->bPWBitOn = false;
1131 
1132         /* Set TSR1 & ReqCount in TxDescHead */
1133         head_td->td1.tcr |= (TCR_STP | TCR_EDP | EDMSDU);
1134         head_td->td1.req_count = cpu_to_le16(head_td->td_info->req_count);
1135 
1136         head_td->buff_addr = cpu_to_le32(head_td->td_info->buf_dma);
1137 
1138         /* Poll Transmit the adapter */
1139         wmb();
1140         head_td->td0.owner = OWNED_BY_NIC;
1141         wmb(); /* second memory barrier */
1142 
1143         if (head_td->td_info->flags & TD_FLAGS_NETIF_SKB)
1144                 MACvTransmitAC0(priv->PortOffset);
1145         else
1146                 MACvTransmit0(priv->PortOffset);
1147 
1148         priv->iTDUsed[dma_idx]++;
1149 
1150         spin_unlock_irqrestore(&priv->lock, flags);
1151 
1152         return 0;
1153 }
1154 
1155 static void vnt_tx_80211(struct ieee80211_hw *hw,
1156                          struct ieee80211_tx_control *control,
1157                          struct sk_buff *skb)
1158 {
1159         struct vnt_private *priv = hw->priv;
1160 
1161         if (vnt_tx_packet(priv, skb))
1162                 ieee80211_free_txskb(hw, skb);
1163 }
1164 
1165 static int vnt_start(struct ieee80211_hw *hw)
1166 {
1167         struct vnt_private *priv = hw->priv;
1168         int ret;
1169 
1170         priv->rx_buf_sz = PKT_BUF_SZ;
1171         if (!device_init_rings(priv))
1172                 return -ENOMEM;
1173 
1174         ret = request_irq(priv->pcid->irq, vnt_interrupt,
1175                           IRQF_SHARED, "vt6655", priv);
1176         if (ret) {
1177                 dev_dbg(&priv->pcid->dev, "failed to start irq\n");
1178                 return ret;
1179         }
1180 
1181         dev_dbg(&priv->pcid->dev, "call device init rd0 ring\n");
1182         device_init_rd0_ring(priv);
1183         device_init_rd1_ring(priv);
1184         device_init_td0_ring(priv);
1185         device_init_td1_ring(priv);
1186 
1187         device_init_registers(priv);
1188 
1189         dev_dbg(&priv->pcid->dev, "call MACvIntEnable\n");
1190         MACvIntEnable(priv->PortOffset, IMR_MASK_VALUE);
1191 
1192         ieee80211_wake_queues(hw);
1193 
1194         return 0;
1195 }
1196 
1197 static void vnt_stop(struct ieee80211_hw *hw)
1198 {
1199         struct vnt_private *priv = hw->priv;
1200 
1201         ieee80211_stop_queues(hw);
1202 
1203         cancel_work_sync(&priv->interrupt_work);
1204 
1205         MACbShutdown(priv);
1206         MACbSoftwareReset(priv);
1207         CARDbRadioPowerOff(priv);
1208 
1209         device_free_td0_ring(priv);
1210         device_free_td1_ring(priv);
1211         device_free_rd0_ring(priv);
1212         device_free_rd1_ring(priv);
1213         device_free_rings(priv);
1214 
1215         free_irq(priv->pcid->irq, priv);
1216 }
1217 
1218 static int vnt_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1219 {
1220         struct vnt_private *priv = hw->priv;
1221 
1222         priv->vif = vif;
1223 
1224         switch (vif->type) {
1225         case NL80211_IFTYPE_STATION:
1226                 break;
1227         case NL80211_IFTYPE_ADHOC:
1228                 MACvRegBitsOff(priv->PortOffset, MAC_REG_RCR, RCR_UNICAST);
1229 
1230                 MACvRegBitsOn(priv->PortOffset, MAC_REG_HOSTCR, HOSTCR_ADHOC);
1231 
1232                 break;
1233         case NL80211_IFTYPE_AP:
1234                 MACvRegBitsOff(priv->PortOffset, MAC_REG_RCR, RCR_UNICAST);
1235 
1236                 MACvRegBitsOn(priv->PortOffset, MAC_REG_HOSTCR, HOSTCR_AP);
1237 
1238                 break;
1239         default:
1240                 return -EOPNOTSUPP;
1241         }
1242 
1243         priv->op_mode = vif->type;
1244 
1245         return 0;
1246 }
1247 
1248 static void vnt_remove_interface(struct ieee80211_hw *hw,
1249                                  struct ieee80211_vif *vif)
1250 {
1251         struct vnt_private *priv = hw->priv;
1252 
1253         switch (vif->type) {
1254         case NL80211_IFTYPE_STATION:
1255                 break;
1256         case NL80211_IFTYPE_ADHOC:
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_ADHOC);
1261                 break;
1262         case NL80211_IFTYPE_AP:
1263                 MACvRegBitsOff(priv->PortOffset, MAC_REG_TCR, TCR_AUTOBCNTX);
1264                 MACvRegBitsOff(priv->PortOffset,
1265                                MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
1266                 MACvRegBitsOff(priv->PortOffset, MAC_REG_HOSTCR, HOSTCR_AP);
1267                 break;
1268         default:
1269                 break;
1270         }
1271 
1272         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
1273 }
1274 
1275 
1276 static int vnt_config(struct ieee80211_hw *hw, u32 changed)
1277 {
1278         struct vnt_private *priv = hw->priv;
1279         struct ieee80211_conf *conf = &hw->conf;
1280         u8 bb_type;
1281 
1282         if (changed & IEEE80211_CONF_CHANGE_PS) {
1283                 if (conf->flags & IEEE80211_CONF_PS)
1284                         PSvEnablePowerSaving(priv, conf->listen_interval);
1285                 else
1286                         PSvDisablePowerSaving(priv);
1287         }
1288 
1289         if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) ||
1290             (conf->flags & IEEE80211_CONF_OFFCHANNEL)) {
1291                 set_channel(priv, conf->chandef.chan);
1292 
1293                 if (conf->chandef.chan->band == NL80211_BAND_5GHZ)
1294                         bb_type = BB_TYPE_11A;
1295                 else
1296                         bb_type = BB_TYPE_11G;
1297 
1298                 if (priv->byBBType != bb_type) {
1299                         priv->byBBType = bb_type;
1300 
1301                         CARDbSetPhyParameter(priv, priv->byBBType);
1302                 }
1303         }
1304 
1305         if (changed & IEEE80211_CONF_CHANGE_POWER) {
1306                 if (priv->byBBType == BB_TYPE_11B)
1307                         priv->wCurrentRate = RATE_1M;
1308                 else
1309                         priv->wCurrentRate = RATE_54M;
1310 
1311                 RFbSetPower(priv, priv->wCurrentRate,
1312                             conf->chandef.chan->hw_value);
1313         }
1314 
1315         return 0;
1316 }
1317 
1318 static void vnt_bss_info_changed(struct ieee80211_hw *hw,
1319                 struct ieee80211_vif *vif, struct ieee80211_bss_conf *conf,
1320                 u32 changed)
1321 {
1322         struct vnt_private *priv = hw->priv;
1323 
1324         priv->current_aid = conf->aid;
1325 
1326         if (changed & BSS_CHANGED_BSSID && conf->bssid) {
1327                 unsigned long flags;
1328 
1329                 spin_lock_irqsave(&priv->lock, flags);
1330 
1331                 MACvWriteBSSIDAddress(priv->PortOffset, (u8 *)conf->bssid);
1332 
1333                 spin_unlock_irqrestore(&priv->lock, flags);
1334         }
1335 
1336         if (changed & BSS_CHANGED_BASIC_RATES) {
1337                 priv->basic_rates = conf->basic_rates;
1338 
1339                 CARDvUpdateBasicTopRate(priv);
1340 
1341                 dev_dbg(&priv->pcid->dev,
1342                         "basic rates %x\n", conf->basic_rates);
1343         }
1344 
1345         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
1346                 if (conf->use_short_preamble) {
1347                         MACvEnableBarkerPreambleMd(priv->PortOffset);
1348                         priv->byPreambleType = true;
1349                 } else {
1350                         MACvDisableBarkerPreambleMd(priv->PortOffset);
1351                         priv->byPreambleType = false;
1352                 }
1353         }
1354 
1355         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
1356                 if (conf->use_cts_prot)
1357                         MACvEnableProtectMD(priv->PortOffset);
1358                 else
1359                         MACvDisableProtectMD(priv->PortOffset);
1360         }
1361 
1362         if (changed & BSS_CHANGED_ERP_SLOT) {
1363                 if (conf->use_short_slot)
1364                         priv->bShortSlotTime = true;
1365                 else
1366                         priv->bShortSlotTime = false;
1367 
1368                 CARDbSetPhyParameter(priv, priv->byBBType);
1369                 BBvSetVGAGainOffset(priv, priv->abyBBVGA[0]);
1370         }
1371 
1372         if (changed & BSS_CHANGED_TXPOWER)
1373                 RFbSetPower(priv, priv->wCurrentRate,
1374                             conf->chandef.chan->hw_value);
1375 
1376         if (changed & BSS_CHANGED_BEACON_ENABLED) {
1377                 dev_dbg(&priv->pcid->dev,
1378                         "Beacon enable %d\n", conf->enable_beacon);
1379 
1380                 if (conf->enable_beacon) {
1381                         vnt_beacon_enable(priv, vif, conf);
1382 
1383                         MACvRegBitsOn(priv->PortOffset, MAC_REG_TCR,
1384                                       TCR_AUTOBCNTX);
1385                 } else {
1386                         MACvRegBitsOff(priv->PortOffset, MAC_REG_TCR,
1387                                        TCR_AUTOBCNTX);
1388                 }
1389         }
1390 
1391         if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INFO) &&
1392             priv->op_mode != NL80211_IFTYPE_AP) {
1393                 if (conf->assoc && conf->beacon_rate) {
1394                         CARDbUpdateTSF(priv, conf->beacon_rate->hw_value,
1395                                        conf->sync_tsf);
1396 
1397                         CARDbSetBeaconPeriod(priv, conf->beacon_int);
1398 
1399                         CARDvSetFirstNextTBTT(priv, conf->beacon_int);
1400                 } else {
1401                         VNSvOutPortB(priv->PortOffset + MAC_REG_TFTCTL,
1402                                      TFTCTL_TSFCNTRST);
1403                         VNSvOutPortB(priv->PortOffset + MAC_REG_TFTCTL,
1404                                      TFTCTL_TSFCNTREN);
1405                 }
1406         }
1407 }
1408 
1409 static u64 vnt_prepare_multicast(struct ieee80211_hw *hw,
1410         struct netdev_hw_addr_list *mc_list)
1411 {
1412         struct vnt_private *priv = hw->priv;
1413         struct netdev_hw_addr *ha;
1414         u64 mc_filter = 0;
1415         u32 bit_nr = 0;
1416 
1417         netdev_hw_addr_list_for_each(ha, mc_list) {
1418                 bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
1419 
1420                 mc_filter |= 1ULL << (bit_nr & 0x3f);
1421         }
1422 
1423         priv->mc_list_count = mc_list->count;
1424 
1425         return mc_filter;
1426 }
1427 
1428 static void vnt_configure(struct ieee80211_hw *hw,
1429         unsigned int changed_flags, unsigned int *total_flags, u64 multicast)
1430 {
1431         struct vnt_private *priv = hw->priv;
1432         u8 rx_mode = 0;
1433 
1434         *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC;
1435 
1436         VNSvInPortB(priv->PortOffset + MAC_REG_RCR, &rx_mode);
1437 
1438         dev_dbg(&priv->pcid->dev, "rx mode in = %x\n", rx_mode);
1439 
1440         if (changed_flags & FIF_ALLMULTI) {
1441                 if (*total_flags & FIF_ALLMULTI) {
1442                         unsigned long flags;
1443 
1444                         spin_lock_irqsave(&priv->lock, flags);
1445 
1446                         if (priv->mc_list_count > 2) {
1447                                 MACvSelectPage1(priv->PortOffset);
1448 
1449                                 VNSvOutPortD(priv->PortOffset +
1450                                              MAC_REG_MAR0, 0xffffffff);
1451                                 VNSvOutPortD(priv->PortOffset +
1452                                             MAC_REG_MAR0 + 4, 0xffffffff);
1453 
1454                                 MACvSelectPage0(priv->PortOffset);
1455                         } else {
1456                                 MACvSelectPage1(priv->PortOffset);
1457 
1458                                 VNSvOutPortD(priv->PortOffset +
1459                                              MAC_REG_MAR0, (u32)multicast);
1460                                 VNSvOutPortD(priv->PortOffset +
1461                                              MAC_REG_MAR0 + 4,
1462                                              (u32)(multicast >> 32));
1463 
1464                                 MACvSelectPage0(priv->PortOffset);
1465                         }
1466 
1467                         spin_unlock_irqrestore(&priv->lock, flags);
1468 
1469                         rx_mode |= RCR_MULTICAST | RCR_BROADCAST;
1470                 } else {
1471                         rx_mode &= ~(RCR_MULTICAST | RCR_BROADCAST);
1472                 }
1473         }
1474 
1475         if (changed_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC)) {
1476                 rx_mode |= RCR_MULTICAST | RCR_BROADCAST;
1477 
1478                 if (*total_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC))
1479                         rx_mode &= ~RCR_BSSID;
1480                 else
1481                         rx_mode |= RCR_BSSID;
1482         }
1483 
1484         VNSvOutPortB(priv->PortOffset + MAC_REG_RCR, rx_mode);
1485 
1486         dev_dbg(&priv->pcid->dev, "rx mode out= %x\n", rx_mode);
1487 }
1488 
1489 static int vnt_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1490         struct ieee80211_vif *vif, struct ieee80211_sta *sta,
1491                 struct ieee80211_key_conf *key)
1492 {
1493         struct vnt_private *priv = hw->priv;
1494 
1495         switch (cmd) {
1496         case SET_KEY:
1497                 if (vnt_set_keys(hw, sta, vif, key))
1498                         return -EOPNOTSUPP;
1499                 break;
1500         case DISABLE_KEY:
1501                 if (test_bit(key->hw_key_idx, &priv->key_entry_inuse))
1502                         clear_bit(key->hw_key_idx, &priv->key_entry_inuse);
1503         default:
1504                 break;
1505         }
1506 
1507         return 0;
1508 }
1509 
1510 static int vnt_get_stats(struct ieee80211_hw *hw,
1511                          struct ieee80211_low_level_stats *stats)
1512 {
1513         struct vnt_private *priv = hw->priv;
1514 
1515         memcpy(stats, &priv->low_stats, sizeof(*stats));
1516 
1517         return 0;
1518 }
1519 
1520 static u64 vnt_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1521 {
1522         struct vnt_private *priv = hw->priv;
1523         u64 tsf;
1524 
1525         CARDbGetCurrentTSF(priv, &tsf);
1526 
1527         return tsf;
1528 }
1529 
1530 static void vnt_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1531                         u64 tsf)
1532 {
1533         struct vnt_private *priv = hw->priv;
1534 
1535         CARDvUpdateNextTBTT(priv, tsf, vif->bss_conf.beacon_int);
1536 }
1537 
1538 static void vnt_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1539 {
1540         struct vnt_private *priv = hw->priv;
1541 
1542         /* reset TSF counter */
1543         VNSvOutPortB(priv->PortOffset + MAC_REG_TFTCTL, TFTCTL_TSFCNTRST);
1544 }
1545 
1546 static const struct ieee80211_ops vnt_mac_ops = {
1547         .tx                     = vnt_tx_80211,
1548         .start                  = vnt_start,
1549         .stop                   = vnt_stop,
1550         .add_interface          = vnt_add_interface,
1551         .remove_interface       = vnt_remove_interface,
1552         .config                 = vnt_config,
1553         .bss_info_changed       = vnt_bss_info_changed,
1554         .prepare_multicast      = vnt_prepare_multicast,
1555         .configure_filter       = vnt_configure,
1556         .set_key                = vnt_set_key,
1557         .get_stats              = vnt_get_stats,
1558         .get_tsf                = vnt_get_tsf,
1559         .set_tsf                = vnt_set_tsf,
1560         .reset_tsf              = vnt_reset_tsf,
1561 };
1562 
1563 static int vnt_init(struct vnt_private *priv)
1564 {
1565         SET_IEEE80211_PERM_ADDR(priv->hw, priv->abyCurrentNetAddr);
1566 
1567         vnt_init_bands(priv);
1568 
1569         if (ieee80211_register_hw(priv->hw))
1570                 return -ENODEV;
1571 
1572         priv->mac_hw = true;
1573 
1574         CARDbRadioPowerOff(priv);
1575 
1576         return 0;
1577 }
1578 
1579 static int
1580 vt6655_probe(struct pci_dev *pcid, const struct pci_device_id *ent)
1581 {
1582         struct vnt_private *priv;
1583         struct ieee80211_hw *hw;
1584         struct wiphy *wiphy;
1585         int         rc;
1586 
1587         dev_notice(&pcid->dev,
1588                    "%s Ver. %s\n", DEVICE_FULL_DRV_NAM, DEVICE_VERSION);
1589 
1590         dev_notice(&pcid->dev,
1591                    "Copyright (c) 2003 VIA Networking Technologies, Inc.\n");
1592 
1593         hw = ieee80211_alloc_hw(sizeof(*priv), &vnt_mac_ops);
1594         if (!hw) {
1595                 dev_err(&pcid->dev, "could not register ieee80211_hw\n");
1596                 return -ENOMEM;
1597         }
1598 
1599         priv = hw->priv;
1600         priv->pcid = pcid;
1601 
1602         spin_lock_init(&priv->lock);
1603 
1604         priv->hw = hw;
1605 
1606         SET_IEEE80211_DEV(priv->hw, &pcid->dev);
1607 
1608         if (pci_enable_device(pcid)) {
1609                 device_free_info(priv);
1610                 return -ENODEV;
1611         }
1612 
1613         dev_dbg(&pcid->dev,
1614                 "Before get pci_info memaddr is %x\n", priv->memaddr);
1615 
1616         pci_set_master(pcid);
1617 
1618         priv->memaddr = pci_resource_start(pcid, 0);
1619         priv->ioaddr = pci_resource_start(pcid, 1);
1620         priv->PortOffset = ioremap(priv->memaddr & PCI_BASE_ADDRESS_MEM_MASK,
1621                                    256);
1622         if (!priv->PortOffset) {
1623                 dev_err(&pcid->dev, ": Failed to IO remapping ..\n");
1624                 device_free_info(priv);
1625                 return -ENODEV;
1626         }
1627 
1628         rc = pci_request_regions(pcid, DEVICE_NAME);
1629         if (rc) {
1630                 dev_err(&pcid->dev, ": Failed to find PCI device\n");
1631                 device_free_info(priv);
1632                 return -ENODEV;
1633         }
1634 
1635         if (dma_set_mask(&pcid->dev, DMA_BIT_MASK(32))) {
1636                 dev_err(&pcid->dev, ": Failed to set dma 32 bit mask\n");
1637                 device_free_info(priv);
1638                 return -ENODEV;
1639         }
1640 
1641         INIT_WORK(&priv->interrupt_work, vnt_interrupt_work);
1642 
1643         /* do reset */
1644         if (!MACbSoftwareReset(priv)) {
1645                 dev_err(&pcid->dev, ": Failed to access MAC hardware..\n");
1646                 device_free_info(priv);
1647                 return -ENODEV;
1648         }
1649         /* initial to reload eeprom */
1650         MACvInitialize(priv);
1651         MACvReadEtherAddress(priv->PortOffset, priv->abyCurrentNetAddr);
1652 
1653         /* Get RFType */
1654         priv->byRFType = SROMbyReadEmbedded(priv->PortOffset, EEP_OFS_RFTYPE);
1655         priv->byRFType &= RF_MASK;
1656 
1657         dev_dbg(&pcid->dev, "RF Type = %x\n", priv->byRFType);
1658 
1659         device_get_options(priv);
1660         device_set_options(priv);
1661 
1662         wiphy = priv->hw->wiphy;
1663 
1664         wiphy->frag_threshold = FRAG_THRESH_DEF;
1665         wiphy->rts_threshold = RTS_THRESH_DEF;
1666         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1667                 BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP);
1668 
1669         ieee80211_hw_set(priv->hw, TIMING_BEACON_ONLY);
1670         ieee80211_hw_set(priv->hw, SIGNAL_DBM);
1671         ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1672         ieee80211_hw_set(priv->hw, REPORTS_TX_ACK_STATUS);
1673         ieee80211_hw_set(priv->hw, SUPPORTS_PS);
1674 
1675         priv->hw->max_signal = 100;
1676 
1677         if (vnt_init(priv))
1678                 return -ENODEV;
1679 
1680         device_print_info(priv);
1681         pci_set_drvdata(pcid, priv);
1682 
1683         return 0;
1684 }
1685 
1686 /*------------------------------------------------------------------*/
1687 
1688 #ifdef CONFIG_PM
1689 static int vt6655_suspend(struct pci_dev *pcid, pm_message_t state)
1690 {
1691         struct vnt_private *priv = pci_get_drvdata(pcid);
1692         unsigned long flags;
1693 
1694         spin_lock_irqsave(&priv->lock, flags);
1695 
1696         pci_save_state(pcid);
1697 
1698         MACbShutdown(priv);
1699 
1700         pci_disable_device(pcid);
1701         pci_set_power_state(pcid, pci_choose_state(pcid, state));
1702 
1703         spin_unlock_irqrestore(&priv->lock, flags);
1704 
1705         return 0;
1706 }
1707 
1708 static int vt6655_resume(struct pci_dev *pcid)
1709 {
1710 
1711         pci_set_power_state(pcid, PCI_D0);
1712         pci_enable_wake(pcid, PCI_D0, 0);
1713         pci_restore_state(pcid);
1714 
1715         return 0;
1716 }
1717 #endif
1718 
1719 MODULE_DEVICE_TABLE(pci, vt6655_pci_id_table);
1720 
1721 static struct pci_driver device_driver = {
1722         .name = DEVICE_NAME,
1723         .id_table = vt6655_pci_id_table,
1724         .probe = vt6655_probe,
1725         .remove = vt6655_remove,
1726 #ifdef CONFIG_PM
1727         .suspend = vt6655_suspend,
1728         .resume = vt6655_resume,
1729 #endif
1730 };
1731 
1732 module_pci_driver(device_driver);
1733 

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