Version:  2.0.40 2.2.26 2.4.37 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2

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  * You should have received a copy of the GNU General Public License along
 16  * with this program; if not, write to the Free Software Foundation, Inc.,
 17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 18  *
 19  * File: main_usb.c
 20  *
 21  * Purpose: driver entry for initial, open, close, tx and rx.
 22  *
 23  * Author: Lyndon Chen
 24  *
 25  * Date: Dec 8, 2005
 26  *
 27  * Functions:
 28  *
 29  *   vt6656_probe - module initial (insmod) driver entry
 30  *   vnt_free_tx_bufs - free tx buffer function
 31  *   vnt_init_registers- initial MAC & BBP & RF internal registers.
 32  *
 33  * Revision History:
 34  */
 35 #undef __NO_VERSION__
 36 
 37 #include <linux/etherdevice.h>
 38 #include <linux/file.h>
 39 #include "device.h"
 40 #include "card.h"
 41 #include "baseband.h"
 42 #include "mac.h"
 43 #include "power.h"
 44 #include "wcmd.h"
 45 #include "rxtx.h"
 46 #include "dpc.h"
 47 #include "rf.h"
 48 #include "firmware.h"
 49 #include "usbpipe.h"
 50 #include "channel.h"
 51 #include "int.h"
 52 
 53 /*
 54  * define module options
 55  */
 56 
 57 /* version information */
 58 #define DRIVER_AUTHOR \
 59         "VIA Networking Technologies, Inc., <lyndonchen@vntek.com.tw>"
 60 MODULE_AUTHOR(DRIVER_AUTHOR);
 61 MODULE_LICENSE("GPL");
 62 MODULE_DESCRIPTION(DEVICE_FULL_DRV_NAM);
 63 
 64 #define RX_DESC_DEF0 64
 65 static int vnt_rx_buffers = RX_DESC_DEF0;
 66 module_param_named(rx_buffers, vnt_rx_buffers, int, 0644);
 67 MODULE_PARM_DESC(rx_buffers, "Number of receive usb rx buffers");
 68 
 69 #define TX_DESC_DEF0 64
 70 static int vnt_tx_buffers = TX_DESC_DEF0;
 71 module_param_named(tx_buffers, vnt_tx_buffers, int, 0644);
 72 MODULE_PARM_DESC(tx_buffers, "Number of receive usb tx buffers");
 73 
 74 #define RTS_THRESH_DEF     2347
 75 #define FRAG_THRESH_DEF     2346
 76 #define SHORT_RETRY_DEF     8
 77 #define LONG_RETRY_DEF     4
 78 
 79 /* BasebandType[] baseband type selected
 80    0: indicate 802.11a type
 81    1: indicate 802.11b type
 82    2: indicate 802.11g type
 83 */
 84 
 85 #define BBP_TYPE_DEF     2
 86 
 87 /*
 88  * Static vars definitions
 89  */
 90 
 91 static struct usb_device_id vt6656_table[] = {
 92         {USB_DEVICE(VNT_USB_VENDOR_ID, VNT_USB_PRODUCT_ID)},
 93         {}
 94 };
 95 
 96 static void vnt_set_options(struct vnt_private *priv)
 97 {
 98         /* Set number of TX buffers */
 99         if (vnt_tx_buffers < CB_MIN_TX_DESC || vnt_tx_buffers > CB_MAX_TX_DESC)
100                 priv->num_tx_context = TX_DESC_DEF0;
101         else
102                 priv->num_tx_context = vnt_tx_buffers;
103 
104         /* Set number of RX buffers */
105         if (vnt_rx_buffers < CB_MIN_RX_DESC || vnt_rx_buffers > CB_MAX_RX_DESC)
106                 priv->num_rcb = RX_DESC_DEF0;
107         else
108                 priv->num_rcb = vnt_rx_buffers;
109 
110         priv->short_retry_limit = SHORT_RETRY_DEF;
111         priv->long_retry_limit = LONG_RETRY_DEF;
112         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
113         priv->bb_type = BBP_TYPE_DEF;
114         priv->packet_type = priv->bb_type;
115         priv->auto_fb_ctrl = AUTO_FB_0;
116         priv->preamble_type = 0;
117         priv->exist_sw_net_addr = false;
118 }
119 
120 /*
121  * initialization of MAC & BBP registers
122  */
123 static int vnt_init_registers(struct vnt_private *priv)
124 {
125         struct vnt_cmd_card_init *init_cmd = &priv->init_command;
126         struct vnt_rsp_card_init *init_rsp = &priv->init_response;
127         u8 antenna;
128         int ii;
129         int status = STATUS_SUCCESS;
130         u8 tmp;
131         u8 calib_tx_iq = 0, calib_tx_dc = 0, calib_rx_iq = 0;
132 
133         dev_dbg(&priv->usb->dev, "---->INIbInitAdapter. [%d][%d]\n",
134                                 DEVICE_INIT_COLD, priv->packet_type);
135 
136         if (!vnt_check_firmware_version(priv)) {
137                 if (vnt_download_firmware(priv) == true) {
138                         if (vnt_firmware_branch_to_sram(priv) == false) {
139                                 dev_dbg(&priv->usb->dev,
140                                         " vnt_firmware_branch_to_sram fail\n");
141                                 return false;
142                         }
143                 } else {
144                         dev_dbg(&priv->usb->dev, "FIRMWAREbDownload fail\n");
145                         return false;
146                 }
147         }
148 
149         if (!vnt_vt3184_init(priv)) {
150                 dev_dbg(&priv->usb->dev, "vnt_vt3184_init fail\n");
151                 return false;
152         }
153 
154         init_cmd->init_class = DEVICE_INIT_COLD;
155         init_cmd->exist_sw_net_addr = priv->exist_sw_net_addr;
156         for (ii = 0; ii < 6; ii++)
157                 init_cmd->sw_net_addr[ii] = priv->current_net_addr[ii];
158         init_cmd->short_retry_limit = priv->short_retry_limit;
159         init_cmd->long_retry_limit = priv->long_retry_limit;
160 
161         /* issue card_init command to device */
162         status = vnt_control_out(priv,
163                 MESSAGE_TYPE_CARDINIT, 0, 0,
164                 sizeof(struct vnt_cmd_card_init), (u8 *)init_cmd);
165         if (status != STATUS_SUCCESS) {
166                 dev_dbg(&priv->usb->dev, "Issue Card init fail\n");
167                 return false;
168         }
169 
170         status = vnt_control_in(priv, MESSAGE_TYPE_INIT_RSP, 0, 0,
171                 sizeof(struct vnt_rsp_card_init), (u8 *)init_rsp);
172         if (status != STATUS_SUCCESS) {
173                 dev_dbg(&priv->usb->dev,
174                         "Cardinit request in status fail!\n");
175                 return false;
176         }
177 
178         /* local ID for AES functions */
179         status = vnt_control_in(priv, MESSAGE_TYPE_READ,
180                 MAC_REG_LOCALID, MESSAGE_REQUEST_MACREG, 1,
181                         &priv->local_id);
182         if (status != STATUS_SUCCESS)
183                 return false;
184 
185         /* do MACbSoftwareReset in MACvInitialize */
186 
187         priv->top_ofdm_basic_rate = RATE_24M;
188         priv->top_cck_basic_rate = RATE_1M;
189 
190         /* target to IF pin while programming to RF chip */
191         priv->power = 0xFF;
192 
193         priv->cck_pwr = priv->eeprom[EEP_OFS_PWR_CCK];
194         priv->ofdm_pwr_g = priv->eeprom[EEP_OFS_PWR_OFDMG];
195         /* load power table */
196         for (ii = 0; ii < 14; ii++) {
197                 priv->cck_pwr_tbl[ii] =
198                         priv->eeprom[ii + EEP_OFS_CCK_PWR_TBL];
199                 if (priv->cck_pwr_tbl[ii] == 0)
200                         priv->cck_pwr_tbl[ii] = priv->cck_pwr;
201 
202                 priv->ofdm_pwr_tbl[ii] =
203                                 priv->eeprom[ii + EEP_OFS_OFDM_PWR_TBL];
204                 if (priv->ofdm_pwr_tbl[ii] == 0)
205                         priv->ofdm_pwr_tbl[ii] = priv->ofdm_pwr_g;
206         }
207 
208         /*
209          * original zonetype is USA, but custom zonetype is Europe,
210          * then need to recover 12, 13, 14 channels with 11 channel
211          */
212         for (ii = 11; ii < 14; ii++) {
213                 priv->cck_pwr_tbl[ii] = priv->cck_pwr_tbl[10];
214                 priv->ofdm_pwr_tbl[ii] = priv->ofdm_pwr_tbl[10];
215         }
216 
217         priv->ofdm_pwr_a = 0x34; /* same as RFbMA2829SelectChannel */
218 
219         /* load OFDM A power table */
220         for (ii = 0; ii < CB_MAX_CHANNEL_5G; ii++) {
221                 priv->ofdm_a_pwr_tbl[ii] =
222                         priv->eeprom[ii + EEP_OFS_OFDMA_PWR_TBL];
223 
224                 if (priv->ofdm_a_pwr_tbl[ii] == 0)
225                         priv->ofdm_a_pwr_tbl[ii] = priv->ofdm_pwr_a;
226         }
227 
228         antenna = priv->eeprom[EEP_OFS_ANTENNA];
229 
230         if (antenna & EEP_ANTINV)
231                 priv->tx_rx_ant_inv = true;
232         else
233                 priv->tx_rx_ant_inv = false;
234 
235         antenna &= (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
236 
237         if (antenna == 0) /* if not set default is both */
238                 antenna = (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
239 
240         if (antenna == (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN)) {
241                 priv->tx_antenna_mode = ANT_B;
242                 priv->rx_antenna_sel = 1;
243 
244                 if (priv->tx_rx_ant_inv == true)
245                         priv->rx_antenna_mode = ANT_A;
246                 else
247                         priv->rx_antenna_mode = ANT_B;
248         } else  {
249                 priv->rx_antenna_sel = 0;
250 
251                 if (antenna & EEP_ANTENNA_AUX) {
252                         priv->tx_antenna_mode = ANT_A;
253 
254                         if (priv->tx_rx_ant_inv == true)
255                                 priv->rx_antenna_mode = ANT_B;
256                         else
257                                 priv->rx_antenna_mode = ANT_A;
258                 } else {
259                         priv->tx_antenna_mode = ANT_B;
260 
261                 if (priv->tx_rx_ant_inv == true)
262                         priv->rx_antenna_mode = ANT_A;
263                 else
264                         priv->rx_antenna_mode = ANT_B;
265                 }
266         }
267 
268         /* Set initial antenna mode */
269         vnt_set_antenna_mode(priv, priv->rx_antenna_mode);
270 
271         /* get Auto Fall Back type */
272         priv->auto_fb_ctrl = AUTO_FB_0;
273 
274         /* default Auto Mode */
275         priv->bb_type = BB_TYPE_11G;
276 
277         /* get RFType */
278         priv->rf_type = init_rsp->rf_type;
279 
280         /* load vt3266 calibration parameters in EEPROM */
281         if (priv->rf_type == RF_VT3226D0) {
282                 if ((priv->eeprom[EEP_OFS_MAJOR_VER] == 0x1) &&
283                     (priv->eeprom[EEP_OFS_MINOR_VER] >= 0x4)) {
284 
285                         calib_tx_iq = priv->eeprom[EEP_OFS_CALIB_TX_IQ];
286                         calib_tx_dc = priv->eeprom[EEP_OFS_CALIB_TX_DC];
287                         calib_rx_iq = priv->eeprom[EEP_OFS_CALIB_RX_IQ];
288                         if (calib_tx_iq || calib_tx_dc || calib_rx_iq) {
289                                 /* CR255, enable TX/RX IQ and
290                                    DC compensation mode */
291                                 vnt_control_out_u8(priv,
292                                                    MESSAGE_REQUEST_BBREG,
293                                                    0xff,
294                                                    0x03);
295                                 /* CR251, TX I/Q Imbalance Calibration */
296                                 vnt_control_out_u8(priv,
297                                                    MESSAGE_REQUEST_BBREG,
298                                                    0xfb,
299                                                    calib_tx_iq);
300                                 /* CR252, TX DC-Offset Calibration */
301                                 vnt_control_out_u8(priv,
302                                                    MESSAGE_REQUEST_BBREG,
303                                                    0xfC,
304                                                    calib_tx_dc);
305                                 /* CR253, RX I/Q Imbalance Calibration */
306                                 vnt_control_out_u8(priv,
307                                                    MESSAGE_REQUEST_BBREG,
308                                                    0xfd,
309                                                    calib_rx_iq);
310                         } else {
311                                 /* CR255, turn off
312                                    BB Calibration compensation */
313                                 vnt_control_out_u8(priv,
314                                                    MESSAGE_REQUEST_BBREG,
315                                                    0xff,
316                                                    0x0);
317                         }
318                 }
319         }
320 
321         /* get permanent network address */
322         memcpy(priv->permanent_net_addr, init_rsp->net_addr, 6);
323         ether_addr_copy(priv->current_net_addr, priv->permanent_net_addr);
324 
325         /* if exist SW network address, use it */
326         dev_dbg(&priv->usb->dev, "Network address = %pM\n",
327                 priv->current_net_addr);
328 
329         /*
330         * set BB and packet type at the same time
331         * set Short Slot Time, xIFS, and RSPINF
332         */
333         if (priv->bb_type == BB_TYPE_11A)
334                 priv->short_slot_time = true;
335         else
336                 priv->short_slot_time = false;
337 
338         vnt_set_short_slot_time(priv);
339 
340         priv->radio_ctl = priv->eeprom[EEP_OFS_RADIOCTL];
341 
342         if ((priv->radio_ctl & EEP_RADIOCTL_ENABLE) != 0) {
343                 status = vnt_control_in(priv, MESSAGE_TYPE_READ,
344                         MAC_REG_GPIOCTL1, MESSAGE_REQUEST_MACREG, 1, &tmp);
345 
346                 if (status != STATUS_SUCCESS)
347                         return false;
348 
349                 if ((tmp & GPIO3_DATA) == 0)
350                         vnt_mac_reg_bits_on(priv, MAC_REG_GPIOCTL1,
351                                                                 GPIO3_INTMD);
352                 else
353                         vnt_mac_reg_bits_off(priv, MAC_REG_GPIOCTL1,
354                                                                 GPIO3_INTMD);
355         }
356 
357         vnt_mac_set_led(priv, LEDSTS_TMLEN, 0x38);
358 
359         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_SLOW);
360 
361         vnt_mac_reg_bits_on(priv, MAC_REG_GPIOCTL0, 0x01);
362 
363         vnt_radio_power_on(priv);
364 
365         dev_dbg(&priv->usb->dev, "<----INIbInitAdapter Exit\n");
366 
367         return true;
368 }
369 
370 static void vnt_free_tx_bufs(struct vnt_private *priv)
371 {
372         struct vnt_usb_send_context *tx_context;
373         int ii;
374 
375         for (ii = 0; ii < priv->num_tx_context; ii++) {
376                 tx_context = priv->tx_context[ii];
377                 /* deallocate URBs */
378                 if (tx_context->urb) {
379                         usb_kill_urb(tx_context->urb);
380                         usb_free_urb(tx_context->urb);
381                 }
382 
383                 kfree(tx_context);
384         }
385 }
386 
387 static void vnt_free_rx_bufs(struct vnt_private *priv)
388 {
389         struct vnt_rcb *rcb;
390         int ii;
391 
392         for (ii = 0; ii < priv->num_rcb; ii++) {
393                 rcb = priv->rcb[ii];
394                 if (!rcb)
395                         continue;
396 
397                 /* deallocate URBs */
398                 if (rcb->urb) {
399                         usb_kill_urb(rcb->urb);
400                         usb_free_urb(rcb->urb);
401                 }
402 
403                 /* deallocate skb */
404                 if (rcb->skb)
405                         dev_kfree_skb(rcb->skb);
406 
407                 kfree(rcb);
408         }
409 }
410 
411 static void usb_device_reset(struct vnt_private *priv)
412 {
413         int status;
414 
415         status = usb_reset_device(priv->usb);
416         if (status)
417                 dev_warn(&priv->usb->dev,
418                          "usb_device_reset fail status=%d\n", status);
419 }
420 
421 static void vnt_free_int_bufs(struct vnt_private *priv)
422 {
423         kfree(priv->int_buf.data_buf);
424 }
425 
426 static bool vnt_alloc_bufs(struct vnt_private *priv)
427 {
428         struct vnt_usb_send_context *tx_context;
429         struct vnt_rcb *rcb;
430         int ii;
431 
432         for (ii = 0; ii < priv->num_tx_context; ii++) {
433                 tx_context = kmalloc(sizeof(struct vnt_usb_send_context),
434                                                                 GFP_KERNEL);
435                 if (tx_context == NULL)
436                         goto free_tx;
437 
438                 priv->tx_context[ii] = tx_context;
439                 tx_context->priv = priv;
440                 tx_context->pkt_no = ii;
441 
442                 /* allocate URBs */
443                 tx_context->urb = usb_alloc_urb(0, GFP_ATOMIC);
444                 if (!tx_context->urb) {
445                         dev_err(&priv->usb->dev, "alloc tx urb failed\n");
446                         goto free_tx;
447                 }
448 
449                 tx_context->in_use = false;
450         }
451 
452         for (ii = 0; ii < priv->num_rcb; ii++) {
453                 priv->rcb[ii] = kzalloc(sizeof(struct vnt_rcb), GFP_KERNEL);
454                 if (!priv->rcb[ii]) {
455                         dev_err(&priv->usb->dev,
456                                         "failed to allocate rcb no %d\n", ii);
457                         goto free_rx_tx;
458                 }
459 
460                 rcb = priv->rcb[ii];
461 
462                 rcb->priv = priv;
463 
464                 /* allocate URBs */
465                 rcb->urb = usb_alloc_urb(0, GFP_ATOMIC);
466                 if (rcb->urb == NULL) {
467                         dev_err(&priv->usb->dev, "Failed to alloc rx urb\n");
468                         goto free_rx_tx;
469                 }
470 
471                 rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
472                 if (rcb->skb == NULL)
473                         goto free_rx_tx;
474 
475                 rcb->in_use = false;
476 
477                 /* submit rx urb */
478                 if (vnt_submit_rx_urb(priv, rcb))
479                         goto free_rx_tx;
480         }
481 
482         priv->interrupt_urb = usb_alloc_urb(0, GFP_ATOMIC);
483         if (priv->interrupt_urb == NULL) {
484                 dev_err(&priv->usb->dev, "Failed to alloc int urb\n");
485                 goto free_rx_tx;
486         }
487 
488         priv->int_buf.data_buf = kmalloc(MAX_INTERRUPT_SIZE, GFP_KERNEL);
489         if (priv->int_buf.data_buf == NULL) {
490                 usb_free_urb(priv->interrupt_urb);
491                 goto free_rx_tx;
492         }
493 
494         return true;
495 
496 free_rx_tx:
497         vnt_free_rx_bufs(priv);
498 
499 free_tx:
500         vnt_free_tx_bufs(priv);
501 
502         return false;
503 }
504 
505 static void vnt_tx_80211(struct ieee80211_hw *hw,
506         struct ieee80211_tx_control *control, struct sk_buff *skb)
507 {
508         struct vnt_private *priv = hw->priv;
509 
510         ieee80211_stop_queues(hw);
511 
512         if (vnt_tx_packet(priv, skb)) {
513                 ieee80211_free_txskb(hw, skb);
514 
515                 ieee80211_wake_queues(hw);
516         }
517 }
518 
519 static int vnt_start(struct ieee80211_hw *hw)
520 {
521         struct vnt_private *priv = hw->priv;
522 
523         priv->rx_buf_sz = MAX_TOTAL_SIZE_WITH_ALL_HEADERS;
524 
525         if (!vnt_alloc_bufs(priv)) {
526                 dev_dbg(&priv->usb->dev, "vnt_alloc_bufs fail...\n");
527                 return -ENOMEM;
528         }
529 
530         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
531 
532         if (vnt_init_registers(priv) == false) {
533                 dev_dbg(&priv->usb->dev, " init register fail\n");
534                 goto free_all;
535         }
536 
537         priv->int_interval = 1;  /* bInterval is set to 1 */
538 
539         vnt_int_start_interrupt(priv);
540 
541         ieee80211_wake_queues(hw);
542 
543         return 0;
544 
545 free_all:
546         vnt_free_rx_bufs(priv);
547         vnt_free_tx_bufs(priv);
548         vnt_free_int_bufs(priv);
549 
550         usb_kill_urb(priv->interrupt_urb);
551         usb_free_urb(priv->interrupt_urb);
552 
553         return -ENOMEM;
554 }
555 
556 static void vnt_stop(struct ieee80211_hw *hw)
557 {
558         struct vnt_private *priv = hw->priv;
559         int i;
560 
561         if (!priv)
562                 return;
563 
564         for (i = 0; i < MAX_KEY_TABLE; i++)
565                 vnt_mac_disable_keyentry(priv, i);
566 
567         /* clear all keys */
568         priv->key_entry_inuse = 0;
569 
570         if (!test_bit(DEVICE_FLAGS_UNPLUG, &priv->flags))
571                 vnt_mac_shutdown(priv);
572 
573         ieee80211_stop_queues(hw);
574 
575         set_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
576 
577         cancel_delayed_work_sync(&priv->run_command_work);
578 
579         priv->cmd_running = false;
580 
581         vnt_free_tx_bufs(priv);
582         vnt_free_rx_bufs(priv);
583         vnt_free_int_bufs(priv);
584 
585         usb_kill_urb(priv->interrupt_urb);
586         usb_free_urb(priv->interrupt_urb);
587 }
588 
589 static int vnt_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
590 {
591         struct vnt_private *priv = hw->priv;
592 
593         priv->vif = vif;
594 
595         switch (vif->type) {
596         case NL80211_IFTYPE_STATION:
597                 break;
598         case NL80211_IFTYPE_ADHOC:
599                 vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
600 
601                 vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
602 
603                 break;
604         case NL80211_IFTYPE_AP:
605                 vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
606 
607                 vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_AP);
608 
609                 break;
610         default:
611                 return -EOPNOTSUPP;
612         }
613 
614         priv->op_mode = vif->type;
615 
616         vnt_set_bss_mode(priv);
617 
618         /* LED blink on TX */
619         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_INTER);
620 
621         return 0;
622 }
623 
624 static void vnt_remove_interface(struct ieee80211_hw *hw,
625                 struct ieee80211_vif *vif)
626 {
627         struct vnt_private *priv = hw->priv;
628 
629         switch (vif->type) {
630         case NL80211_IFTYPE_STATION:
631                 break;
632         case NL80211_IFTYPE_ADHOC:
633                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
634                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
635                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
636                 break;
637         case NL80211_IFTYPE_AP:
638                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
639                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
640                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_AP);
641                 break;
642         default:
643                 break;
644         }
645 
646         vnt_radio_power_off(priv);
647 
648         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
649 
650         /* LED slow blink */
651         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_SLOW);
652 }
653 
654 static int vnt_config(struct ieee80211_hw *hw, u32 changed)
655 {
656         struct vnt_private *priv = hw->priv;
657         struct ieee80211_conf *conf = &hw->conf;
658         u8 bb_type;
659 
660         if (changed & IEEE80211_CONF_CHANGE_PS) {
661                 if (conf->flags & IEEE80211_CONF_PS)
662                         vnt_enable_power_saving(priv, conf->listen_interval);
663                 else
664                         vnt_disable_power_saving(priv);
665         }
666 
667         if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) ||
668                         (conf->flags & IEEE80211_CONF_OFFCHANNEL)) {
669                 vnt_set_channel(priv, conf->chandef.chan->hw_value);
670 
671                 if (conf->chandef.chan->band == IEEE80211_BAND_5GHZ)
672                         bb_type = BB_TYPE_11A;
673                 else
674                         bb_type = BB_TYPE_11G;
675 
676                 if (priv->bb_type != bb_type) {
677                         priv->bb_type = bb_type;
678 
679                         vnt_set_bss_mode(priv);
680                 }
681         }
682 
683         if (changed & IEEE80211_CONF_CHANGE_POWER) {
684                 if (priv->bb_type == BB_TYPE_11B)
685                         priv->current_rate = RATE_1M;
686                 else
687                         priv->current_rate = RATE_54M;
688 
689                 vnt_rf_setpower(priv, priv->current_rate,
690                                 conf->chandef.chan->hw_value);
691         }
692 
693         return 0;
694 }
695 
696 static void vnt_bss_info_changed(struct ieee80211_hw *hw,
697                 struct ieee80211_vif *vif, struct ieee80211_bss_conf *conf,
698                 u32 changed)
699 {
700         struct vnt_private *priv = hw->priv;
701 
702         priv->current_aid = conf->aid;
703 
704         if (changed & BSS_CHANGED_BSSID && conf->bssid)
705                 vnt_mac_set_bssid_addr(priv, (u8 *)conf->bssid);
706 
707 
708         if (changed & BSS_CHANGED_BASIC_RATES) {
709                 priv->basic_rates = conf->basic_rates;
710 
711                 vnt_update_top_rates(priv);
712 
713                 dev_dbg(&priv->usb->dev, "basic rates %x\n", conf->basic_rates);
714         }
715 
716         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
717                 if (conf->use_short_preamble) {
718                         vnt_mac_enable_barker_preamble_mode(priv);
719                         priv->preamble_type = true;
720                 } else {
721                         vnt_mac_disable_barker_preamble_mode(priv);
722                         priv->preamble_type = false;
723                 }
724         }
725 
726         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
727                 if (conf->use_cts_prot)
728                         vnt_mac_enable_protect_mode(priv);
729                 else
730                         vnt_mac_disable_protect_mode(priv);
731         }
732 
733         if (changed & BSS_CHANGED_ERP_SLOT) {
734                 if (conf->use_short_slot)
735                         priv->short_slot_time = true;
736                 else
737                         priv->short_slot_time = false;
738 
739                 vnt_set_short_slot_time(priv);
740                 vnt_set_vga_gain_offset(priv, priv->bb_vga[0]);
741                 vnt_update_pre_ed_threshold(priv, false);
742         }
743 
744         if (changed & BSS_CHANGED_TXPOWER)
745                 vnt_rf_setpower(priv, priv->current_rate,
746                                         conf->chandef.chan->hw_value);
747 
748         if (changed & BSS_CHANGED_BEACON_ENABLED) {
749                 dev_dbg(&priv->usb->dev,
750                                 "Beacon enable %d\n", conf->enable_beacon);
751 
752                 if (conf->enable_beacon) {
753                         vnt_beacon_enable(priv, vif, conf);
754 
755                         vnt_mac_reg_bits_on(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
756                 } else {
757                         vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
758                 }
759         }
760 }
761 
762 static u64 vnt_prepare_multicast(struct ieee80211_hw *hw,
763         struct netdev_hw_addr_list *mc_list)
764 {
765         struct vnt_private *priv = hw->priv;
766         struct netdev_hw_addr *ha;
767         u64 mc_filter = 0;
768         u32 bit_nr = 0;
769 
770         netdev_hw_addr_list_for_each(ha, mc_list) {
771                 bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
772 
773                 mc_filter |= 1ULL << (bit_nr & 0x3f);
774         }
775 
776         priv->mc_list_count = mc_list->count;
777 
778         return mc_filter;
779 }
780 
781 static void vnt_configure(struct ieee80211_hw *hw,
782         unsigned int changed_flags, unsigned int *total_flags, u64 multicast)
783 {
784         struct vnt_private *priv = hw->priv;
785         u8 rx_mode = 0;
786         int rc;
787 
788         *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC;
789 
790         rc = vnt_control_in(priv, MESSAGE_TYPE_READ, MAC_REG_RCR,
791                 MESSAGE_REQUEST_MACREG, sizeof(u8), &rx_mode);
792 
793         if (!rc)
794                 rx_mode = RCR_MULTICAST | RCR_BROADCAST;
795 
796         dev_dbg(&priv->usb->dev, "rx mode in = %x\n", rx_mode);
797 
798         if (changed_flags & FIF_ALLMULTI) {
799                 if (*total_flags & FIF_ALLMULTI) {
800                         if (priv->mc_list_count > 2)
801                                 vnt_mac_set_filter(priv, ~0);
802                         else
803                                 vnt_mac_set_filter(priv, multicast);
804 
805                         rx_mode |= RCR_MULTICAST | RCR_BROADCAST;
806                 } else {
807                         rx_mode &= ~(RCR_MULTICAST | RCR_BROADCAST);
808                 }
809 
810         }
811 
812         if (changed_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC)) {
813                 if (*total_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC))
814                         rx_mode &= ~RCR_BSSID;
815                 else
816                         rx_mode |= RCR_BSSID;
817         }
818 
819         vnt_control_out_u8(priv, MESSAGE_REQUEST_MACREG, MAC_REG_RCR, rx_mode);
820 
821         dev_dbg(&priv->usb->dev, "rx mode out= %x\n", rx_mode);
822 }
823 
824 static int vnt_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
825         struct ieee80211_vif *vif, struct ieee80211_sta *sta,
826                 struct ieee80211_key_conf *key)
827 {
828         struct vnt_private *priv = hw->priv;
829 
830         switch (cmd) {
831         case SET_KEY:
832                 if (vnt_set_keys(hw, sta, vif, key))
833                         return -EOPNOTSUPP;
834                 break;
835         case DISABLE_KEY:
836                 if (test_bit(key->hw_key_idx, &priv->key_entry_inuse))
837                         clear_bit(key->hw_key_idx, &priv->key_entry_inuse);
838         default:
839                 break;
840         }
841 
842         return 0;
843 }
844 
845 static void vnt_sw_scan_start(struct ieee80211_hw *hw,
846                               struct ieee80211_vif *vif,
847                               const u8 *addr)
848 {
849         struct vnt_private *priv = hw->priv;
850 
851         vnt_set_bss_mode(priv);
852         /* Set max sensitivity*/
853         vnt_update_pre_ed_threshold(priv, true);
854 }
855 
856 static void vnt_sw_scan_complete(struct ieee80211_hw *hw,
857                                  struct ieee80211_vif *vif)
858 {
859         struct vnt_private *priv = hw->priv;
860 
861         /* Return sensitivity to channel level*/
862         vnt_update_pre_ed_threshold(priv, false);
863 }
864 
865 static int vnt_get_stats(struct ieee80211_hw *hw,
866                                 struct ieee80211_low_level_stats *stats)
867 {
868         struct vnt_private *priv = hw->priv;
869 
870         memcpy(stats, &priv->low_stats, sizeof(*stats));
871 
872         return 0;
873 }
874 
875 static u64 vnt_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
876 {
877         struct vnt_private *priv = hw->priv;
878 
879         return priv->current_tsf;
880 }
881 
882 static void vnt_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
883                         u64 tsf)
884 {
885         struct vnt_private *priv = hw->priv;
886 
887         vnt_update_next_tbtt(priv, tsf, vif->bss_conf.beacon_int);
888 }
889 
890 static void vnt_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
891 {
892         struct vnt_private *priv = hw->priv;
893 
894         vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
895 
896         vnt_clear_current_tsf(priv);
897 }
898 
899 static const struct ieee80211_ops vnt_mac_ops = {
900         .tx                     = vnt_tx_80211,
901         .start                  = vnt_start,
902         .stop                   = vnt_stop,
903         .add_interface          = vnt_add_interface,
904         .remove_interface       = vnt_remove_interface,
905         .config                 = vnt_config,
906         .bss_info_changed       = vnt_bss_info_changed,
907         .prepare_multicast      = vnt_prepare_multicast,
908         .configure_filter       = vnt_configure,
909         .set_key                = vnt_set_key,
910         .sw_scan_start          = vnt_sw_scan_start,
911         .sw_scan_complete       = vnt_sw_scan_complete,
912         .get_stats              = vnt_get_stats,
913         .get_tsf                = vnt_get_tsf,
914         .set_tsf                = vnt_set_tsf,
915         .reset_tsf              = vnt_reset_tsf,
916 };
917 
918 int vnt_init(struct vnt_private *priv)
919 {
920 
921         if (!(vnt_init_registers(priv)))
922                 return -EAGAIN;
923 
924         SET_IEEE80211_PERM_ADDR(priv->hw, priv->permanent_net_addr);
925 
926         vnt_init_bands(priv);
927 
928         if (ieee80211_register_hw(priv->hw))
929                 return -ENODEV;
930 
931         priv->mac_hw = true;
932 
933         vnt_radio_power_off(priv);
934 
935         return 0;
936 }
937 
938 static int
939 vt6656_probe(struct usb_interface *intf, const struct usb_device_id *id)
940 {
941         struct usb_device *udev;
942         struct vnt_private *priv;
943         struct ieee80211_hw *hw;
944         struct wiphy *wiphy;
945         int rc = 0;
946 
947         udev = usb_get_dev(interface_to_usbdev(intf));
948 
949         dev_notice(&udev->dev, "%s Ver. %s\n",
950                                         DEVICE_FULL_DRV_NAM, DEVICE_VERSION);
951         dev_notice(&udev->dev,
952                 "Copyright (c) 2004 VIA Networking Technologies, Inc.\n");
953 
954         hw = ieee80211_alloc_hw(sizeof(struct vnt_private), &vnt_mac_ops);
955         if (!hw) {
956                 dev_err(&udev->dev, "could not register ieee80211_hw\n");
957                 rc = -ENOMEM;
958                 goto err_nomem;
959         }
960 
961         priv = hw->priv;
962         priv->hw = hw;
963         priv->usb = udev;
964 
965         vnt_set_options(priv);
966 
967         spin_lock_init(&priv->lock);
968         mutex_init(&priv->usb_lock);
969 
970         INIT_DELAYED_WORK(&priv->run_command_work, vnt_run_command);
971 
972         usb_set_intfdata(intf, priv);
973 
974         wiphy = priv->hw->wiphy;
975 
976         wiphy->frag_threshold = FRAG_THRESH_DEF;
977         wiphy->rts_threshold = RTS_THRESH_DEF;
978         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
979                 BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP);
980 
981         ieee80211_hw_set(priv->hw, TIMING_BEACON_ONLY);
982         ieee80211_hw_set(priv->hw, SIGNAL_DBM);
983         ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
984         ieee80211_hw_set(priv->hw, REPORTS_TX_ACK_STATUS);
985 
986         priv->hw->max_signal = 100;
987 
988         SET_IEEE80211_DEV(priv->hw, &intf->dev);
989 
990         usb_device_reset(priv);
991 
992         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
993         vnt_reset_command_timer(priv);
994 
995         vnt_schedule_command(priv, WLAN_CMD_INIT_MAC80211);
996 
997         return 0;
998 
999 err_nomem:
1000         usb_put_dev(udev);
1001 
1002         return rc;
1003 }
1004 
1005 static void vt6656_disconnect(struct usb_interface *intf)
1006 {
1007         struct vnt_private *priv = usb_get_intfdata(intf);
1008 
1009         if (!priv)
1010                 return;
1011 
1012         if (priv->mac_hw)
1013                 ieee80211_unregister_hw(priv->hw);
1014 
1015         usb_set_intfdata(intf, NULL);
1016         usb_put_dev(interface_to_usbdev(intf));
1017 
1018         set_bit(DEVICE_FLAGS_UNPLUG, &priv->flags);
1019 
1020         ieee80211_free_hw(priv->hw);
1021 }
1022 
1023 #ifdef CONFIG_PM
1024 
1025 static int vt6656_suspend(struct usb_interface *intf, pm_message_t message)
1026 {
1027         return 0;
1028 }
1029 
1030 static int vt6656_resume(struct usb_interface *intf)
1031 {
1032         return 0;
1033 }
1034 
1035 #endif /* CONFIG_PM */
1036 
1037 MODULE_DEVICE_TABLE(usb, vt6656_table);
1038 
1039 static struct usb_driver vt6656_driver = {
1040         .name =         DEVICE_NAME,
1041         .probe =        vt6656_probe,
1042         .disconnect =   vt6656_disconnect,
1043         .id_table =     vt6656_table,
1044 #ifdef CONFIG_PM
1045         .suspend = vt6656_suspend,
1046         .resume = vt6656_resume,
1047 #endif /* CONFIG_PM */
1048 };
1049 
1050 module_usb_driver(vt6656_driver);
1051 

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