Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

Linux/drivers/staging/vt6656/main_usb.c

  1 /*
  2  * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
  3  * All rights reserved.
  4  *
  5  * This program is free software; you can redistribute it and/or modify
  6  * it under the terms of the GNU General Public License as published by
  7  * the Free Software Foundation; either version 2 of the License, or
  8  * (at your option) any later version.
  9  *
 10  * This program is distributed in the hope that it will be useful,
 11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13  * GNU General Public License for more details.
 14  *
 15  *
 16  * File: main_usb.c
 17  *
 18  * Purpose: driver entry for initial, open, close, tx and rx.
 19  *
 20  * Author: Lyndon Chen
 21  *
 22  * Date: Dec 8, 2005
 23  *
 24  * Functions:
 25  *
 26  *   vt6656_probe - module initial (insmod) driver entry
 27  *   vnt_free_tx_bufs - free tx buffer function
 28  *   vnt_init_registers- initial MAC & BBP & RF internal registers.
 29  *
 30  * Revision History:
 31  */
 32 #undef __NO_VERSION__
 33 
 34 #include <linux/etherdevice.h>
 35 #include <linux/file.h>
 36 #include "device.h"
 37 #include "card.h"
 38 #include "baseband.h"
 39 #include "mac.h"
 40 #include "power.h"
 41 #include "wcmd.h"
 42 #include "rxtx.h"
 43 #include "dpc.h"
 44 #include "rf.h"
 45 #include "firmware.h"
 46 #include "usbpipe.h"
 47 #include "channel.h"
 48 #include "int.h"
 49 
 50 /*
 51  * define module options
 52  */
 53 
 54 /* version information */
 55 #define DRIVER_AUTHOR \
 56         "VIA Networking Technologies, Inc., <lyndonchen@vntek.com.tw>"
 57 MODULE_AUTHOR(DRIVER_AUTHOR);
 58 MODULE_LICENSE("GPL");
 59 MODULE_DESCRIPTION(DEVICE_FULL_DRV_NAM);
 60 
 61 #define RX_DESC_DEF0 64
 62 static int vnt_rx_buffers = RX_DESC_DEF0;
 63 module_param_named(rx_buffers, vnt_rx_buffers, int, 0644);
 64 MODULE_PARM_DESC(rx_buffers, "Number of receive usb rx buffers");
 65 
 66 #define TX_DESC_DEF0 64
 67 static int vnt_tx_buffers = TX_DESC_DEF0;
 68 module_param_named(tx_buffers, vnt_tx_buffers, int, 0644);
 69 MODULE_PARM_DESC(tx_buffers, "Number of receive usb tx buffers");
 70 
 71 #define RTS_THRESH_DEF     2347
 72 #define FRAG_THRESH_DEF     2346
 73 #define SHORT_RETRY_DEF     8
 74 #define LONG_RETRY_DEF     4
 75 
 76 /* BasebandType[] baseband type selected
 77  * 0: indicate 802.11a type
 78  * 1: indicate 802.11b type
 79  * 2: indicate 802.11g type
 80  */
 81 
 82 #define BBP_TYPE_DEF     2
 83 
 84 /*
 85  * Static vars definitions
 86  */
 87 
 88 static const struct usb_device_id vt6656_table[] = {
 89         {USB_DEVICE(VNT_USB_VENDOR_ID, VNT_USB_PRODUCT_ID)},
 90         {}
 91 };
 92 
 93 static void vnt_set_options(struct vnt_private *priv)
 94 {
 95         /* Set number of TX buffers */
 96         if (vnt_tx_buffers < CB_MIN_TX_DESC || vnt_tx_buffers > CB_MAX_TX_DESC)
 97                 priv->num_tx_context = TX_DESC_DEF0;
 98         else
 99                 priv->num_tx_context = vnt_tx_buffers;
100 
101         /* Set number of RX buffers */
102         if (vnt_rx_buffers < CB_MIN_RX_DESC || vnt_rx_buffers > CB_MAX_RX_DESC)
103                 priv->num_rcb = RX_DESC_DEF0;
104         else
105                 priv->num_rcb = vnt_rx_buffers;
106 
107         priv->short_retry_limit = SHORT_RETRY_DEF;
108         priv->long_retry_limit = LONG_RETRY_DEF;
109         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
110         priv->bb_type = BBP_TYPE_DEF;
111         priv->packet_type = priv->bb_type;
112         priv->auto_fb_ctrl = AUTO_FB_0;
113         priv->preamble_type = 0;
114         priv->exist_sw_net_addr = false;
115 }
116 
117 /*
118  * initialization of MAC & BBP registers
119  */
120 static int vnt_init_registers(struct vnt_private *priv)
121 {
122         struct vnt_cmd_card_init *init_cmd = &priv->init_command;
123         struct vnt_rsp_card_init *init_rsp = &priv->init_response;
124         u8 antenna;
125         int ii;
126         int status = STATUS_SUCCESS;
127         u8 tmp;
128         u8 calib_tx_iq = 0, calib_tx_dc = 0, calib_rx_iq = 0;
129 
130         dev_dbg(&priv->usb->dev, "---->INIbInitAdapter. [%d][%d]\n",
131                                 DEVICE_INIT_COLD, priv->packet_type);
132 
133         if (!vnt_check_firmware_version(priv)) {
134                 if (vnt_download_firmware(priv) == true) {
135                         if (vnt_firmware_branch_to_sram(priv) == false) {
136                                 dev_dbg(&priv->usb->dev,
137                                         " vnt_firmware_branch_to_sram fail\n");
138                                 return false;
139                         }
140                 } else {
141                         dev_dbg(&priv->usb->dev, "FIRMWAREbDownload fail\n");
142                         return false;
143                 }
144         }
145 
146         if (!vnt_vt3184_init(priv)) {
147                 dev_dbg(&priv->usb->dev, "vnt_vt3184_init fail\n");
148                 return false;
149         }
150 
151         init_cmd->init_class = DEVICE_INIT_COLD;
152         init_cmd->exist_sw_net_addr = priv->exist_sw_net_addr;
153         for (ii = 0; ii < 6; ii++)
154                 init_cmd->sw_net_addr[ii] = priv->current_net_addr[ii];
155         init_cmd->short_retry_limit = priv->short_retry_limit;
156         init_cmd->long_retry_limit = priv->long_retry_limit;
157 
158         /* issue card_init command to device */
159         status = vnt_control_out(priv,
160                 MESSAGE_TYPE_CARDINIT, 0, 0,
161                 sizeof(struct vnt_cmd_card_init), (u8 *)init_cmd);
162         if (status != STATUS_SUCCESS) {
163                 dev_dbg(&priv->usb->dev, "Issue Card init fail\n");
164                 return false;
165         }
166 
167         status = vnt_control_in(priv, MESSAGE_TYPE_INIT_RSP, 0, 0,
168                 sizeof(struct vnt_rsp_card_init), (u8 *)init_rsp);
169         if (status != STATUS_SUCCESS) {
170                 dev_dbg(&priv->usb->dev,
171                         "Cardinit request in status fail!\n");
172                 return false;
173         }
174 
175         /* local ID for AES functions */
176         status = vnt_control_in(priv, MESSAGE_TYPE_READ,
177                 MAC_REG_LOCALID, MESSAGE_REQUEST_MACREG, 1,
178                         &priv->local_id);
179         if (status != STATUS_SUCCESS)
180                 return false;
181 
182         /* do MACbSoftwareReset in MACvInitialize */
183 
184         priv->top_ofdm_basic_rate = RATE_24M;
185         priv->top_cck_basic_rate = RATE_1M;
186 
187         /* target to IF pin while programming to RF chip */
188         priv->power = 0xFF;
189 
190         priv->cck_pwr = priv->eeprom[EEP_OFS_PWR_CCK];
191         priv->ofdm_pwr_g = priv->eeprom[EEP_OFS_PWR_OFDMG];
192         /* load power table */
193         for (ii = 0; ii < 14; ii++) {
194                 priv->cck_pwr_tbl[ii] =
195                         priv->eeprom[ii + EEP_OFS_CCK_PWR_TBL];
196                 if (priv->cck_pwr_tbl[ii] == 0)
197                         priv->cck_pwr_tbl[ii] = priv->cck_pwr;
198 
199                 priv->ofdm_pwr_tbl[ii] =
200                                 priv->eeprom[ii + EEP_OFS_OFDM_PWR_TBL];
201                 if (priv->ofdm_pwr_tbl[ii] == 0)
202                         priv->ofdm_pwr_tbl[ii] = priv->ofdm_pwr_g;
203         }
204 
205         /*
206          * original zonetype is USA, but custom zonetype is Europe,
207          * then need to recover 12, 13, 14 channels with 11 channel
208          */
209         for (ii = 11; ii < 14; ii++) {
210                 priv->cck_pwr_tbl[ii] = priv->cck_pwr_tbl[10];
211                 priv->ofdm_pwr_tbl[ii] = priv->ofdm_pwr_tbl[10];
212         }
213 
214         priv->ofdm_pwr_a = 0x34; /* same as RFbMA2829SelectChannel */
215 
216         /* load OFDM A power table */
217         for (ii = 0; ii < CB_MAX_CHANNEL_5G; ii++) {
218                 priv->ofdm_a_pwr_tbl[ii] =
219                         priv->eeprom[ii + EEP_OFS_OFDMA_PWR_TBL];
220 
221                 if (priv->ofdm_a_pwr_tbl[ii] == 0)
222                         priv->ofdm_a_pwr_tbl[ii] = priv->ofdm_pwr_a;
223         }
224 
225         antenna = priv->eeprom[EEP_OFS_ANTENNA];
226 
227         if (antenna & EEP_ANTINV)
228                 priv->tx_rx_ant_inv = true;
229         else
230                 priv->tx_rx_ant_inv = false;
231 
232         antenna &= (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
233 
234         if (antenna == 0) /* if not set default is both */
235                 antenna = (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
236 
237         if (antenna == (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN)) {
238                 priv->tx_antenna_mode = ANT_B;
239                 priv->rx_antenna_sel = 1;
240 
241                 if (priv->tx_rx_ant_inv)
242                         priv->rx_antenna_mode = ANT_A;
243                 else
244                         priv->rx_antenna_mode = ANT_B;
245         } else  {
246                 priv->rx_antenna_sel = 0;
247 
248                 if (antenna & EEP_ANTENNA_AUX) {
249                         priv->tx_antenna_mode = ANT_A;
250 
251                         if (priv->tx_rx_ant_inv)
252                                 priv->rx_antenna_mode = ANT_B;
253                         else
254                                 priv->rx_antenna_mode = ANT_A;
255                 } else {
256                         priv->tx_antenna_mode = ANT_B;
257 
258                 if (priv->tx_rx_ant_inv)
259                         priv->rx_antenna_mode = ANT_A;
260                 else
261                         priv->rx_antenna_mode = ANT_B;
262                 }
263         }
264 
265         /* Set initial antenna mode */
266         vnt_set_antenna_mode(priv, priv->rx_antenna_mode);
267 
268         /* get Auto Fall Back type */
269         priv->auto_fb_ctrl = AUTO_FB_0;
270 
271         /* default Auto Mode */
272         priv->bb_type = BB_TYPE_11G;
273 
274         /* get RFType */
275         priv->rf_type = init_rsp->rf_type;
276 
277         /* load vt3266 calibration parameters in EEPROM */
278         if (priv->rf_type == RF_VT3226D0) {
279                 if ((priv->eeprom[EEP_OFS_MAJOR_VER] == 0x1) &&
280                     (priv->eeprom[EEP_OFS_MINOR_VER] >= 0x4)) {
281 
282                         calib_tx_iq = priv->eeprom[EEP_OFS_CALIB_TX_IQ];
283                         calib_tx_dc = priv->eeprom[EEP_OFS_CALIB_TX_DC];
284                         calib_rx_iq = priv->eeprom[EEP_OFS_CALIB_RX_IQ];
285                         if (calib_tx_iq || calib_tx_dc || calib_rx_iq) {
286                                 /* CR255, enable TX/RX IQ and
287                                  * DC compensation mode
288                                  */
289                                 vnt_control_out_u8(priv,
290                                                    MESSAGE_REQUEST_BBREG,
291                                                    0xff,
292                                                    0x03);
293                                 /* CR251, TX I/Q Imbalance Calibration */
294                                 vnt_control_out_u8(priv,
295                                                    MESSAGE_REQUEST_BBREG,
296                                                    0xfb,
297                                                    calib_tx_iq);
298                                 /* CR252, TX DC-Offset Calibration */
299                                 vnt_control_out_u8(priv,
300                                                    MESSAGE_REQUEST_BBREG,
301                                                    0xfC,
302                                                    calib_tx_dc);
303                                 /* CR253, RX I/Q Imbalance Calibration */
304                                 vnt_control_out_u8(priv,
305                                                    MESSAGE_REQUEST_BBREG,
306                                                    0xfd,
307                                                    calib_rx_iq);
308                         } else {
309                                 /* CR255, turn off
310                                  * BB Calibration compensation
311                                  */
312                                 vnt_control_out_u8(priv,
313                                                    MESSAGE_REQUEST_BBREG,
314                                                    0xff,
315                                                    0x0);
316                         }
317                 }
318         }
319 
320         /* get permanent network address */
321         memcpy(priv->permanent_net_addr, init_rsp->net_addr, 6);
322         ether_addr_copy(priv->current_net_addr, priv->permanent_net_addr);
323 
324         /* if exist SW network address, use it */
325         dev_dbg(&priv->usb->dev, "Network address = %pM\n",
326                 priv->current_net_addr);
327 
328         /*
329          * set BB and packet type at the same time
330          * set Short Slot Time, xIFS, and RSPINF
331          */
332         if (priv->bb_type == BB_TYPE_11A)
333                 priv->short_slot_time = true;
334         else
335                 priv->short_slot_time = false;
336 
337         vnt_set_short_slot_time(priv);
338 
339         priv->radio_ctl = priv->eeprom[EEP_OFS_RADIOCTL];
340 
341         if ((priv->radio_ctl & EEP_RADIOCTL_ENABLE) != 0) {
342                 status = vnt_control_in(priv, MESSAGE_TYPE_READ,
343                         MAC_REG_GPIOCTL1, MESSAGE_REQUEST_MACREG, 1, &tmp);
344 
345                 if (status != STATUS_SUCCESS)
346                         return false;
347 
348                 if ((tmp & GPIO3_DATA) == 0)
349                         vnt_mac_reg_bits_on(priv, MAC_REG_GPIOCTL1,
350                                                                 GPIO3_INTMD);
351                 else
352                         vnt_mac_reg_bits_off(priv, MAC_REG_GPIOCTL1,
353                                                                 GPIO3_INTMD);
354         }
355 
356         vnt_mac_set_led(priv, LEDSTS_TMLEN, 0x38);
357 
358         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_SLOW);
359 
360         vnt_mac_reg_bits_on(priv, MAC_REG_GPIOCTL0, 0x01);
361 
362         vnt_radio_power_on(priv);
363 
364         dev_dbg(&priv->usb->dev, "<----INIbInitAdapter Exit\n");
365 
366         return true;
367 }
368 
369 static void vnt_free_tx_bufs(struct vnt_private *priv)
370 {
371         struct vnt_usb_send_context *tx_context;
372         int ii;
373 
374         for (ii = 0; ii < priv->num_tx_context; ii++) {
375                 tx_context = priv->tx_context[ii];
376                 /* deallocate URBs */
377                 if (tx_context->urb) {
378                         usb_kill_urb(tx_context->urb);
379                         usb_free_urb(tx_context->urb);
380                 }
381 
382                 kfree(tx_context);
383         }
384 }
385 
386 static void vnt_free_rx_bufs(struct vnt_private *priv)
387 {
388         struct vnt_rcb *rcb;
389         int ii;
390 
391         for (ii = 0; ii < priv->num_rcb; ii++) {
392                 rcb = priv->rcb[ii];
393                 if (!rcb)
394                         continue;
395 
396                 /* deallocate URBs */
397                 if (rcb->urb) {
398                         usb_kill_urb(rcb->urb);
399                         usb_free_urb(rcb->urb);
400                 }
401 
402                 /* deallocate skb */
403                 if (rcb->skb)
404                         dev_kfree_skb(rcb->skb);
405 
406                 kfree(rcb);
407         }
408 }
409 
410 static void usb_device_reset(struct vnt_private *priv)
411 {
412         int status;
413 
414         status = usb_reset_device(priv->usb);
415         if (status)
416                 dev_warn(&priv->usb->dev,
417                          "usb_device_reset fail status=%d\n", status);
418 }
419 
420 static void vnt_free_int_bufs(struct vnt_private *priv)
421 {
422         kfree(priv->int_buf.data_buf);
423 }
424 
425 static bool vnt_alloc_bufs(struct vnt_private *priv)
426 {
427         struct vnt_usb_send_context *tx_context;
428         struct vnt_rcb *rcb;
429         int ii;
430 
431         for (ii = 0; ii < priv->num_tx_context; ii++) {
432                 tx_context = kmalloc(sizeof(struct vnt_usb_send_context),
433                                                                 GFP_KERNEL);
434                 if (!tx_context)
435                         goto free_tx;
436 
437                 priv->tx_context[ii] = tx_context;
438                 tx_context->priv = priv;
439                 tx_context->pkt_no = ii;
440 
441                 /* allocate URBs */
442                 tx_context->urb = usb_alloc_urb(0, GFP_KERNEL);
443                 if (!tx_context->urb)
444                         goto free_tx;
445 
446                 tx_context->in_use = false;
447         }
448 
449         for (ii = 0; ii < priv->num_rcb; ii++) {
450                 priv->rcb[ii] = kzalloc(sizeof(struct vnt_rcb), GFP_KERNEL);
451                 if (!priv->rcb[ii]) {
452                         dev_err(&priv->usb->dev,
453                                         "failed to allocate rcb no %d\n", ii);
454                         goto free_rx_tx;
455                 }
456 
457                 rcb = priv->rcb[ii];
458 
459                 rcb->priv = priv;
460 
461                 /* allocate URBs */
462                 rcb->urb = usb_alloc_urb(0, GFP_KERNEL);
463                 if (!rcb->urb)
464                         goto free_rx_tx;
465 
466                 rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
467                 if (!rcb->skb)
468                         goto free_rx_tx;
469 
470                 rcb->in_use = false;
471 
472                 /* submit rx urb */
473                 if (vnt_submit_rx_urb(priv, rcb))
474                         goto free_rx_tx;
475         }
476 
477         priv->interrupt_urb = usb_alloc_urb(0, GFP_KERNEL);
478         if (!priv->interrupt_urb)
479                 goto free_rx_tx;
480 
481         priv->int_buf.data_buf = kmalloc(MAX_INTERRUPT_SIZE, GFP_KERNEL);
482         if (!priv->int_buf.data_buf) {
483                 usb_free_urb(priv->interrupt_urb);
484                 goto free_rx_tx;
485         }
486 
487         return true;
488 
489 free_rx_tx:
490         vnt_free_rx_bufs(priv);
491 
492 free_tx:
493         vnt_free_tx_bufs(priv);
494 
495         return false;
496 }
497 
498 static void vnt_tx_80211(struct ieee80211_hw *hw,
499         struct ieee80211_tx_control *control, struct sk_buff *skb)
500 {
501         struct vnt_private *priv = hw->priv;
502 
503         if (vnt_tx_packet(priv, skb))
504                 ieee80211_free_txskb(hw, skb);
505 }
506 
507 static int vnt_start(struct ieee80211_hw *hw)
508 {
509         struct vnt_private *priv = hw->priv;
510 
511         priv->rx_buf_sz = MAX_TOTAL_SIZE_WITH_ALL_HEADERS;
512 
513         if (!vnt_alloc_bufs(priv)) {
514                 dev_dbg(&priv->usb->dev, "vnt_alloc_bufs fail...\n");
515                 return -ENOMEM;
516         }
517 
518         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
519 
520         if (vnt_init_registers(priv) == false) {
521                 dev_dbg(&priv->usb->dev, " init register fail\n");
522                 goto free_all;
523         }
524 
525         priv->int_interval = 1;  /* bInterval is set to 1 */
526 
527         vnt_int_start_interrupt(priv);
528 
529         ieee80211_wake_queues(hw);
530 
531         return 0;
532 
533 free_all:
534         vnt_free_rx_bufs(priv);
535         vnt_free_tx_bufs(priv);
536         vnt_free_int_bufs(priv);
537 
538         usb_kill_urb(priv->interrupt_urb);
539         usb_free_urb(priv->interrupt_urb);
540 
541         return -ENOMEM;
542 }
543 
544 static void vnt_stop(struct ieee80211_hw *hw)
545 {
546         struct vnt_private *priv = hw->priv;
547         int i;
548 
549         if (!priv)
550                 return;
551 
552         for (i = 0; i < MAX_KEY_TABLE; i++)
553                 vnt_mac_disable_keyentry(priv, i);
554 
555         /* clear all keys */
556         priv->key_entry_inuse = 0;
557 
558         if (!test_bit(DEVICE_FLAGS_UNPLUG, &priv->flags))
559                 vnt_mac_shutdown(priv);
560 
561         ieee80211_stop_queues(hw);
562 
563         set_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
564 
565         cancel_delayed_work_sync(&priv->run_command_work);
566 
567         priv->cmd_running = false;
568 
569         vnt_free_tx_bufs(priv);
570         vnt_free_rx_bufs(priv);
571         vnt_free_int_bufs(priv);
572 
573         usb_kill_urb(priv->interrupt_urb);
574         usb_free_urb(priv->interrupt_urb);
575 }
576 
577 static int vnt_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
578 {
579         struct vnt_private *priv = hw->priv;
580 
581         priv->vif = vif;
582 
583         switch (vif->type) {
584         case NL80211_IFTYPE_STATION:
585                 break;
586         case NL80211_IFTYPE_ADHOC:
587                 vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
588 
589                 vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
590 
591                 break;
592         case NL80211_IFTYPE_AP:
593                 vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
594 
595                 vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_AP);
596 
597                 break;
598         default:
599                 return -EOPNOTSUPP;
600         }
601 
602         priv->op_mode = vif->type;
603 
604         vnt_set_bss_mode(priv);
605 
606         /* LED blink on TX */
607         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_INTER);
608 
609         return 0;
610 }
611 
612 static void vnt_remove_interface(struct ieee80211_hw *hw,
613                 struct ieee80211_vif *vif)
614 {
615         struct vnt_private *priv = hw->priv;
616 
617         switch (vif->type) {
618         case NL80211_IFTYPE_STATION:
619                 break;
620         case NL80211_IFTYPE_ADHOC:
621                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
622                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
623                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
624                 break;
625         case NL80211_IFTYPE_AP:
626                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
627                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
628                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_AP);
629                 break;
630         default:
631                 break;
632         }
633 
634         vnt_radio_power_off(priv);
635 
636         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
637 
638         /* LED slow blink */
639         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_SLOW);
640 }
641 
642 static int vnt_config(struct ieee80211_hw *hw, u32 changed)
643 {
644         struct vnt_private *priv = hw->priv;
645         struct ieee80211_conf *conf = &hw->conf;
646         u8 bb_type;
647 
648         if (changed & IEEE80211_CONF_CHANGE_PS) {
649                 if (conf->flags & IEEE80211_CONF_PS)
650                         vnt_enable_power_saving(priv, conf->listen_interval);
651                 else
652                         vnt_disable_power_saving(priv);
653         }
654 
655         if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) ||
656                         (conf->flags & IEEE80211_CONF_OFFCHANNEL)) {
657                 vnt_set_channel(priv, conf->chandef.chan->hw_value);
658 
659                 if (conf->chandef.chan->band == NL80211_BAND_5GHZ)
660                         bb_type = BB_TYPE_11A;
661                 else
662                         bb_type = BB_TYPE_11G;
663 
664                 if (priv->bb_type != bb_type) {
665                         priv->bb_type = bb_type;
666 
667                         vnt_set_bss_mode(priv);
668                 }
669         }
670 
671         if (changed & IEEE80211_CONF_CHANGE_POWER) {
672                 if (priv->bb_type == BB_TYPE_11B)
673                         priv->current_rate = RATE_1M;
674                 else
675                         priv->current_rate = RATE_54M;
676 
677                 vnt_rf_setpower(priv, priv->current_rate,
678                                 conf->chandef.chan->hw_value);
679         }
680 
681         return 0;
682 }
683 
684 static void vnt_bss_info_changed(struct ieee80211_hw *hw,
685                 struct ieee80211_vif *vif, struct ieee80211_bss_conf *conf,
686                 u32 changed)
687 {
688         struct vnt_private *priv = hw->priv;
689 
690         priv->current_aid = conf->aid;
691 
692         if (changed & BSS_CHANGED_BSSID && conf->bssid)
693                 vnt_mac_set_bssid_addr(priv, (u8 *)conf->bssid);
694 
695 
696         if (changed & BSS_CHANGED_BASIC_RATES) {
697                 priv->basic_rates = conf->basic_rates;
698 
699                 vnt_update_top_rates(priv);
700 
701                 dev_dbg(&priv->usb->dev, "basic rates %x\n", conf->basic_rates);
702         }
703 
704         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
705                 if (conf->use_short_preamble) {
706                         vnt_mac_enable_barker_preamble_mode(priv);
707                         priv->preamble_type = true;
708                 } else {
709                         vnt_mac_disable_barker_preamble_mode(priv);
710                         priv->preamble_type = false;
711                 }
712         }
713 
714         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
715                 if (conf->use_cts_prot)
716                         vnt_mac_enable_protect_mode(priv);
717                 else
718                         vnt_mac_disable_protect_mode(priv);
719         }
720 
721         if (changed & BSS_CHANGED_ERP_SLOT) {
722                 if (conf->use_short_slot)
723                         priv->short_slot_time = true;
724                 else
725                         priv->short_slot_time = false;
726 
727                 vnt_set_short_slot_time(priv);
728                 vnt_set_vga_gain_offset(priv, priv->bb_vga[0]);
729                 vnt_update_pre_ed_threshold(priv, false);
730         }
731 
732         if (changed & BSS_CHANGED_TXPOWER)
733                 vnt_rf_setpower(priv, priv->current_rate,
734                                         conf->chandef.chan->hw_value);
735 
736         if (changed & BSS_CHANGED_BEACON_ENABLED) {
737                 dev_dbg(&priv->usb->dev,
738                                 "Beacon enable %d\n", conf->enable_beacon);
739 
740                 if (conf->enable_beacon) {
741                         vnt_beacon_enable(priv, vif, conf);
742 
743                         vnt_mac_reg_bits_on(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
744                 } else {
745                         vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
746                 }
747         }
748 
749         if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INFO) &&
750             priv->op_mode != NL80211_IFTYPE_AP) {
751                 if (conf->assoc && conf->beacon_rate) {
752                         vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL,
753                                             TFTCTL_TSFCNTREN);
754 
755                         vnt_adjust_tsf(priv, conf->beacon_rate->hw_value,
756                                        conf->sync_tsf, priv->current_tsf);
757 
758                         vnt_mac_set_beacon_interval(priv, conf->beacon_int);
759 
760                         vnt_reset_next_tbtt(priv, conf->beacon_int);
761                 } else {
762                         vnt_clear_current_tsf(priv);
763 
764                         vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL,
765                                              TFTCTL_TSFCNTREN);
766                 }
767         }
768 }
769 
770 static u64 vnt_prepare_multicast(struct ieee80211_hw *hw,
771         struct netdev_hw_addr_list *mc_list)
772 {
773         struct vnt_private *priv = hw->priv;
774         struct netdev_hw_addr *ha;
775         u64 mc_filter = 0;
776         u32 bit_nr = 0;
777 
778         netdev_hw_addr_list_for_each(ha, mc_list) {
779                 bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
780 
781                 mc_filter |= 1ULL << (bit_nr & 0x3f);
782         }
783 
784         priv->mc_list_count = mc_list->count;
785 
786         return mc_filter;
787 }
788 
789 static void vnt_configure(struct ieee80211_hw *hw,
790         unsigned int changed_flags, unsigned int *total_flags, u64 multicast)
791 {
792         struct vnt_private *priv = hw->priv;
793         u8 rx_mode = 0;
794         int rc;
795 
796         *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC;
797 
798         rc = vnt_control_in(priv, MESSAGE_TYPE_READ, MAC_REG_RCR,
799                 MESSAGE_REQUEST_MACREG, sizeof(u8), &rx_mode);
800 
801         if (!rc)
802                 rx_mode = RCR_MULTICAST | RCR_BROADCAST;
803 
804         dev_dbg(&priv->usb->dev, "rx mode in = %x\n", rx_mode);
805 
806         if (changed_flags & FIF_ALLMULTI) {
807                 if (*total_flags & FIF_ALLMULTI) {
808                         if (priv->mc_list_count > 2)
809                                 vnt_mac_set_filter(priv, ~0);
810                         else
811                                 vnt_mac_set_filter(priv, multicast);
812 
813                         rx_mode |= RCR_MULTICAST | RCR_BROADCAST;
814                 } else {
815                         rx_mode &= ~(RCR_MULTICAST | RCR_BROADCAST);
816                 }
817 
818         }
819 
820         if (changed_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC)) {
821                 if (*total_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC))
822                         rx_mode &= ~RCR_BSSID;
823                 else
824                         rx_mode |= RCR_BSSID;
825         }
826 
827         vnt_control_out_u8(priv, MESSAGE_REQUEST_MACREG, MAC_REG_RCR, rx_mode);
828 
829         dev_dbg(&priv->usb->dev, "rx mode out= %x\n", rx_mode);
830 }
831 
832 static int vnt_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
833         struct ieee80211_vif *vif, struct ieee80211_sta *sta,
834                 struct ieee80211_key_conf *key)
835 {
836         struct vnt_private *priv = hw->priv;
837 
838         switch (cmd) {
839         case SET_KEY:
840                 if (vnt_set_keys(hw, sta, vif, key))
841                         return -EOPNOTSUPP;
842                 break;
843         case DISABLE_KEY:
844                 if (test_bit(key->hw_key_idx, &priv->key_entry_inuse))
845                         clear_bit(key->hw_key_idx, &priv->key_entry_inuse);
846         default:
847                 break;
848         }
849 
850         return 0;
851 }
852 
853 static void vnt_sw_scan_start(struct ieee80211_hw *hw,
854                               struct ieee80211_vif *vif,
855                               const u8 *addr)
856 {
857         struct vnt_private *priv = hw->priv;
858 
859         vnt_set_bss_mode(priv);
860         /* Set max sensitivity*/
861         vnt_update_pre_ed_threshold(priv, true);
862 }
863 
864 static void vnt_sw_scan_complete(struct ieee80211_hw *hw,
865                                  struct ieee80211_vif *vif)
866 {
867         struct vnt_private *priv = hw->priv;
868 
869         /* Return sensitivity to channel level*/
870         vnt_update_pre_ed_threshold(priv, false);
871 }
872 
873 static int vnt_get_stats(struct ieee80211_hw *hw,
874                                 struct ieee80211_low_level_stats *stats)
875 {
876         struct vnt_private *priv = hw->priv;
877 
878         memcpy(stats, &priv->low_stats, sizeof(*stats));
879 
880         return 0;
881 }
882 
883 static u64 vnt_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
884 {
885         struct vnt_private *priv = hw->priv;
886 
887         return priv->current_tsf;
888 }
889 
890 static void vnt_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
891                         u64 tsf)
892 {
893         struct vnt_private *priv = hw->priv;
894 
895         vnt_update_next_tbtt(priv, tsf, vif->bss_conf.beacon_int);
896 }
897 
898 static void vnt_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
899 {
900         struct vnt_private *priv = hw->priv;
901 
902         vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
903 
904         vnt_clear_current_tsf(priv);
905 }
906 
907 static const struct ieee80211_ops vnt_mac_ops = {
908         .tx                     = vnt_tx_80211,
909         .start                  = vnt_start,
910         .stop                   = vnt_stop,
911         .add_interface          = vnt_add_interface,
912         .remove_interface       = vnt_remove_interface,
913         .config                 = vnt_config,
914         .bss_info_changed       = vnt_bss_info_changed,
915         .prepare_multicast      = vnt_prepare_multicast,
916         .configure_filter       = vnt_configure,
917         .set_key                = vnt_set_key,
918         .sw_scan_start          = vnt_sw_scan_start,
919         .sw_scan_complete       = vnt_sw_scan_complete,
920         .get_stats              = vnt_get_stats,
921         .get_tsf                = vnt_get_tsf,
922         .set_tsf                = vnt_set_tsf,
923         .reset_tsf              = vnt_reset_tsf,
924 };
925 
926 int vnt_init(struct vnt_private *priv)
927 {
928 
929         if (!(vnt_init_registers(priv)))
930                 return -EAGAIN;
931 
932         SET_IEEE80211_PERM_ADDR(priv->hw, priv->permanent_net_addr);
933 
934         vnt_init_bands(priv);
935 
936         if (ieee80211_register_hw(priv->hw))
937                 return -ENODEV;
938 
939         priv->mac_hw = true;
940 
941         vnt_radio_power_off(priv);
942 
943         return 0;
944 }
945 
946 static int
947 vt6656_probe(struct usb_interface *intf, const struct usb_device_id *id)
948 {
949         struct usb_device *udev;
950         struct vnt_private *priv;
951         struct ieee80211_hw *hw;
952         struct wiphy *wiphy;
953         int rc = 0;
954 
955         udev = usb_get_dev(interface_to_usbdev(intf));
956 
957         dev_notice(&udev->dev, "%s Ver. %s\n",
958                                         DEVICE_FULL_DRV_NAM, DEVICE_VERSION);
959         dev_notice(&udev->dev,
960                 "Copyright (c) 2004 VIA Networking Technologies, Inc.\n");
961 
962         hw = ieee80211_alloc_hw(sizeof(struct vnt_private), &vnt_mac_ops);
963         if (!hw) {
964                 dev_err(&udev->dev, "could not register ieee80211_hw\n");
965                 rc = -ENOMEM;
966                 goto err_nomem;
967         }
968 
969         priv = hw->priv;
970         priv->hw = hw;
971         priv->usb = udev;
972 
973         vnt_set_options(priv);
974 
975         spin_lock_init(&priv->lock);
976         mutex_init(&priv->usb_lock);
977 
978         INIT_DELAYED_WORK(&priv->run_command_work, vnt_run_command);
979 
980         usb_set_intfdata(intf, priv);
981 
982         wiphy = priv->hw->wiphy;
983 
984         wiphy->frag_threshold = FRAG_THRESH_DEF;
985         wiphy->rts_threshold = RTS_THRESH_DEF;
986         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
987                 BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP);
988 
989         ieee80211_hw_set(priv->hw, TIMING_BEACON_ONLY);
990         ieee80211_hw_set(priv->hw, SIGNAL_DBM);
991         ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
992         ieee80211_hw_set(priv->hw, REPORTS_TX_ACK_STATUS);
993         ieee80211_hw_set(priv->hw, SUPPORTS_PS);
994 
995         priv->hw->max_signal = 100;
996 
997         SET_IEEE80211_DEV(priv->hw, &intf->dev);
998 
999         usb_device_reset(priv);
1000 
1001         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
1002         vnt_reset_command_timer(priv);
1003 
1004         vnt_schedule_command(priv, WLAN_CMD_INIT_MAC80211);
1005 
1006         return 0;
1007 
1008 err_nomem:
1009         usb_put_dev(udev);
1010 
1011         return rc;
1012 }
1013 
1014 static void vt6656_disconnect(struct usb_interface *intf)
1015 {
1016         struct vnt_private *priv = usb_get_intfdata(intf);
1017 
1018         if (!priv)
1019                 return;
1020 
1021         if (priv->mac_hw)
1022                 ieee80211_unregister_hw(priv->hw);
1023 
1024         usb_set_intfdata(intf, NULL);
1025         usb_put_dev(interface_to_usbdev(intf));
1026 
1027         set_bit(DEVICE_FLAGS_UNPLUG, &priv->flags);
1028 
1029         ieee80211_free_hw(priv->hw);
1030 }
1031 
1032 #ifdef CONFIG_PM
1033 
1034 static int vt6656_suspend(struct usb_interface *intf, pm_message_t message)
1035 {
1036         return 0;
1037 }
1038 
1039 static int vt6656_resume(struct usb_interface *intf)
1040 {
1041         return 0;
1042 }
1043 
1044 #endif /* CONFIG_PM */
1045 
1046 MODULE_DEVICE_TABLE(usb, vt6656_table);
1047 
1048 static struct usb_driver vt6656_driver = {
1049         .name =         DEVICE_NAME,
1050         .probe =        vt6656_probe,
1051         .disconnect =   vt6656_disconnect,
1052         .id_table =     vt6656_table,
1053 #ifdef CONFIG_PM
1054         .suspend = vt6656_suspend,
1055         .resume = vt6656_resume,
1056 #endif /* CONFIG_PM */
1057 };
1058 
1059 module_usb_driver(vt6656_driver);
1060 

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