Version:  2.0.40 2.2.26 2.4.37 3.3 3.4 3.5 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

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/file.h>
 38 #include "device.h"
 39 #include "card.h"
 40 #include "baseband.h"
 41 #include "mac.h"
 42 #include "power.h"
 43 #include "wcmd.h"
 44 #include "rxtx.h"
 45 #include "dpc.h"
 46 #include "rf.h"
 47 #include "firmware.h"
 48 #include "usbpipe.h"
 49 #include "channel.h"
 50 #include "int.h"
 51 
 52 /*
 53  * define module options
 54  */
 55 
 56 /* version information */
 57 #define DRIVER_AUTHOR \
 58         "VIA Networking Technologies, Inc., <lyndonchen@vntek.com.tw>"
 59 MODULE_AUTHOR(DRIVER_AUTHOR);
 60 MODULE_LICENSE("GPL");
 61 MODULE_DESCRIPTION(DEVICE_FULL_DRV_NAM);
 62 
 63 #define RX_DESC_DEF0 64
 64 static int vnt_rx_buffers = RX_DESC_DEF0;
 65 module_param_named(rx_buffers, vnt_rx_buffers, int, 0644);
 66 MODULE_PARM_DESC(rx_buffers, "Number of receive usb rx buffers");
 67 
 68 #define TX_DESC_DEF0 64
 69 static int vnt_tx_buffers = TX_DESC_DEF0;
 70 module_param_named(tx_buffers, vnt_tx_buffers, int, 0644);
 71 MODULE_PARM_DESC(tx_buffers, "Number of receive usb tx buffers");
 72 
 73 #define RTS_THRESH_DEF     2347
 74 #define FRAG_THRESH_DEF     2346
 75 #define SHORT_RETRY_DEF     8
 76 #define LONG_RETRY_DEF     4
 77 
 78 /* BasebandType[] baseband type selected
 79    0: indicate 802.11a type
 80    1: indicate 802.11b type
 81    2: indicate 802.11g type
 82 */
 83 
 84 #define BBP_TYPE_DEF     2
 85 
 86 /*
 87  * Static vars definitions
 88  */
 89 
 90 static struct usb_device_id vt6656_table[] = {
 91         {USB_DEVICE(VNT_USB_VENDOR_ID, VNT_USB_PRODUCT_ID)},
 92         {}
 93 };
 94 
 95 static void vnt_set_options(struct vnt_private *priv)
 96 {
 97         /* Set number of TX buffers */
 98         if (vnt_tx_buffers < CB_MIN_TX_DESC || vnt_tx_buffers > CB_MAX_TX_DESC)
 99                 priv->num_tx_context = TX_DESC_DEF0;
100         else
101                 priv->num_tx_context = vnt_tx_buffers;
102 
103         /* Set number of RX buffers */
104         if (vnt_rx_buffers < CB_MIN_RX_DESC || vnt_rx_buffers > CB_MAX_RX_DESC)
105                 priv->num_rcb = RX_DESC_DEF0;
106         else
107                 priv->num_rcb = vnt_rx_buffers;
108 
109         priv->short_retry_limit = SHORT_RETRY_DEF;
110         priv->long_retry_limit = LONG_RETRY_DEF;
111         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
112         priv->bb_type = BBP_TYPE_DEF;
113         priv->packet_type = priv->bb_type;
114         priv->auto_fb_ctrl = AUTO_FB_0;
115         priv->preamble_type = 0;
116         priv->exist_sw_net_addr = false;
117 }
118 
119 /*
120  * initialization of MAC & BBP registers
121  */
122 static int vnt_init_registers(struct vnt_private *priv)
123 {
124         struct vnt_cmd_card_init *init_cmd = &priv->init_command;
125         struct vnt_rsp_card_init *init_rsp = &priv->init_response;
126         u8 antenna;
127         int ii;
128         int status = STATUS_SUCCESS;
129         u8 tmp;
130         u8 calib_tx_iq = 0, calib_tx_dc = 0, calib_rx_iq = 0;
131 
132         dev_dbg(&priv->usb->dev, "---->INIbInitAdapter. [%d][%d]\n",
133                                 DEVICE_INIT_COLD, priv->packet_type);
134 
135         if (!vnt_check_firmware_version(priv)) {
136                 if (vnt_download_firmware(priv) == true) {
137                         if (vnt_firmware_branch_to_sram(priv) == false) {
138                                 dev_dbg(&priv->usb->dev,
139                                         " vnt_firmware_branch_to_sram fail\n");
140                                 return false;
141                         }
142                 } else {
143                         dev_dbg(&priv->usb->dev, "FIRMWAREbDownload fail\n");
144                         return false;
145                 }
146         }
147 
148         if (!vnt_vt3184_init(priv)) {
149                 dev_dbg(&priv->usb->dev, "vnt_vt3184_init fail\n");
150                 return false;
151         }
152 
153         init_cmd->init_class = DEVICE_INIT_COLD;
154         init_cmd->exist_sw_net_addr = priv->exist_sw_net_addr;
155         for (ii = 0; ii < 6; ii++)
156                 init_cmd->sw_net_addr[ii] = priv->current_net_addr[ii];
157         init_cmd->short_retry_limit = priv->short_retry_limit;
158         init_cmd->long_retry_limit = priv->long_retry_limit;
159 
160         /* issue card_init command to device */
161         status = vnt_control_out(priv,
162                 MESSAGE_TYPE_CARDINIT, 0, 0,
163                 sizeof(struct vnt_cmd_card_init), (u8 *)init_cmd);
164         if (status != STATUS_SUCCESS) {
165                 dev_dbg(&priv->usb->dev, "Issue Card init fail\n");
166                 return false;
167         }
168 
169         status = vnt_control_in(priv, MESSAGE_TYPE_INIT_RSP, 0, 0,
170                 sizeof(struct vnt_rsp_card_init), (u8 *)init_rsp);
171         if (status != STATUS_SUCCESS) {
172                 dev_dbg(&priv->usb->dev,
173                         "Cardinit request in status fail!\n");
174                 return false;
175         }
176 
177         /* local ID for AES functions */
178         status = vnt_control_in(priv, MESSAGE_TYPE_READ,
179                 MAC_REG_LOCALID, MESSAGE_REQUEST_MACREG, 1,
180                         &priv->local_id);
181         if (status != STATUS_SUCCESS)
182                 return false;
183 
184         /* do MACbSoftwareReset in MACvInitialize */
185 
186         priv->top_ofdm_basic_rate = RATE_24M;
187         priv->top_cck_basic_rate = RATE_1M;
188 
189         /* target to IF pin while programming to RF chip */
190         priv->power = 0xFF;
191 
192         priv->cck_pwr = priv->eeprom[EEP_OFS_PWR_CCK];
193         priv->ofdm_pwr_g = priv->eeprom[EEP_OFS_PWR_OFDMG];
194         /* load power table */
195         for (ii = 0; ii < 14; ii++) {
196                 priv->cck_pwr_tbl[ii] =
197                         priv->eeprom[ii + EEP_OFS_CCK_PWR_TBL];
198                 if (priv->cck_pwr_tbl[ii] == 0)
199                         priv->cck_pwr_tbl[ii] = priv->cck_pwr;
200 
201                 priv->ofdm_pwr_tbl[ii] =
202                                 priv->eeprom[ii + EEP_OFS_OFDM_PWR_TBL];
203                 if (priv->ofdm_pwr_tbl[ii] == 0)
204                         priv->ofdm_pwr_tbl[ii] = priv->ofdm_pwr_g;
205         }
206 
207         /*
208          * original zonetype is USA, but custom zonetype is Europe,
209          * then need to recover 12, 13, 14 channels with 11 channel
210          */
211         for (ii = 11; ii < 14; ii++) {
212                 priv->cck_pwr_tbl[ii] = priv->cck_pwr_tbl[10];
213                 priv->ofdm_pwr_tbl[ii] = priv->ofdm_pwr_tbl[10];
214         }
215 
216         priv->ofdm_pwr_a = 0x34; /* same as RFbMA2829SelectChannel */
217 
218         /* load OFDM A power table */
219         for (ii = 0; ii < CB_MAX_CHANNEL_5G; ii++) {
220                 priv->ofdm_a_pwr_tbl[ii] =
221                         priv->eeprom[ii + EEP_OFS_OFDMA_PWR_TBL];
222 
223                 if (priv->ofdm_a_pwr_tbl[ii] == 0)
224                         priv->ofdm_a_pwr_tbl[ii] = priv->ofdm_pwr_a;
225         }
226 
227         antenna = priv->eeprom[EEP_OFS_ANTENNA];
228 
229         if (antenna & EEP_ANTINV)
230                 priv->tx_rx_ant_inv = true;
231         else
232                 priv->tx_rx_ant_inv = false;
233 
234         antenna &= (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
235 
236         if (antenna == 0) /* if not set default is both */
237                 antenna = (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
238 
239         if (antenna == (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN)) {
240                 priv->tx_antenna_mode = ANT_B;
241                 priv->rx_antenna_sel = 1;
242 
243                 if (priv->tx_rx_ant_inv == true)
244                         priv->rx_antenna_mode = ANT_A;
245                 else
246                         priv->rx_antenna_mode = ANT_B;
247         } else  {
248                 priv->rx_antenna_sel = 0;
249 
250                 if (antenna & EEP_ANTENNA_AUX) {
251                         priv->tx_antenna_mode = ANT_A;
252 
253                         if (priv->tx_rx_ant_inv == true)
254                                 priv->rx_antenna_mode = ANT_B;
255                         else
256                                 priv->rx_antenna_mode = ANT_A;
257                 } else {
258                         priv->tx_antenna_mode = ANT_B;
259 
260                 if (priv->tx_rx_ant_inv == true)
261                         priv->rx_antenna_mode = ANT_A;
262                 else
263                         priv->rx_antenna_mode = ANT_B;
264                 }
265         }
266 
267         /* Set initial antenna mode */
268         vnt_set_antenna_mode(priv, priv->rx_antenna_mode);
269 
270         /* get Auto Fall Back type */
271         priv->auto_fb_ctrl = AUTO_FB_0;
272 
273         /* default Auto Mode */
274         priv->bb_type = BB_TYPE_11G;
275 
276         /* get RFType */
277         priv->rf_type = init_rsp->rf_type;
278 
279         /* load vt3266 calibration parameters in EEPROM */
280         if (priv->rf_type == RF_VT3226D0) {
281                 if ((priv->eeprom[EEP_OFS_MAJOR_VER] == 0x1) &&
282                     (priv->eeprom[EEP_OFS_MINOR_VER] >= 0x4)) {
283 
284                         calib_tx_iq = priv->eeprom[EEP_OFS_CALIB_TX_IQ];
285                         calib_tx_dc = priv->eeprom[EEP_OFS_CALIB_TX_DC];
286                         calib_rx_iq = priv->eeprom[EEP_OFS_CALIB_RX_IQ];
287                         if (calib_tx_iq || calib_tx_dc || calib_rx_iq) {
288                                 /* CR255, enable TX/RX IQ and
289                                    DC compensation mode */
290                                 vnt_control_out_u8(priv,
291                                                    MESSAGE_REQUEST_BBREG,
292                                                    0xff,
293                                                    0x03);
294                                 /* CR251, TX I/Q Imbalance Calibration */
295                                 vnt_control_out_u8(priv,
296                                                    MESSAGE_REQUEST_BBREG,
297                                                    0xfb,
298                                                    calib_tx_iq);
299                                 /* CR252, TX DC-Offset Calibration */
300                                 vnt_control_out_u8(priv,
301                                                    MESSAGE_REQUEST_BBREG,
302                                                    0xfC,
303                                                    calib_tx_dc);
304                                 /* CR253, RX I/Q Imbalance Calibration */
305                                 vnt_control_out_u8(priv,
306                                                    MESSAGE_REQUEST_BBREG,
307                                                    0xfd,
308                                                    calib_rx_iq);
309                         } else {
310                                 /* CR255, turn off
311                                    BB Calibration compensation */
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         memcpy(priv->current_net_addr, priv->permanent_net_addr, ETH_ALEN);
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 == NULL)
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_ATOMIC);
443                 if (!tx_context->urb) {
444                         dev_err(&priv->usb->dev, "alloc tx urb failed\n");
445                         goto free_tx;
446                 }
447 
448                 tx_context->in_use = false;
449         }
450 
451         for (ii = 0; ii < priv->num_rcb; ii++) {
452                 priv->rcb[ii] = kzalloc(sizeof(struct vnt_rcb), GFP_KERNEL);
453                 if (!priv->rcb[ii]) {
454                         dev_err(&priv->usb->dev,
455                                         "failed to allocate rcb no %d\n", ii);
456                         goto free_rx_tx;
457                 }
458 
459                 rcb = priv->rcb[ii];
460 
461                 rcb->priv = priv;
462 
463                 /* allocate URBs */
464                 rcb->urb = usb_alloc_urb(0, GFP_ATOMIC);
465                 if (rcb->urb == NULL) {
466                         dev_err(&priv->usb->dev, "Failed to alloc rx urb\n");
467                         goto free_rx_tx;
468                 }
469 
470                 rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
471                 if (rcb->skb == NULL)
472                         goto free_rx_tx;
473 
474                 rcb->in_use = false;
475 
476                 /* submit rx urb */
477                 if (vnt_submit_rx_urb(priv, rcb))
478                         goto free_rx_tx;
479         }
480 
481         priv->interrupt_urb = usb_alloc_urb(0, GFP_ATOMIC);
482         if (priv->interrupt_urb == NULL) {
483                 dev_err(&priv->usb->dev, "Failed to alloc int urb\n");
484                 goto free_rx_tx;
485         }
486 
487         priv->int_buf.data_buf = kmalloc(MAX_INTERRUPT_SIZE, GFP_KERNEL);
488         if (priv->int_buf.data_buf == NULL) {
489                 usb_free_urb(priv->interrupt_urb);
490                 goto free_rx_tx;
491         }
492 
493         return true;
494 
495 free_rx_tx:
496         vnt_free_rx_bufs(priv);
497 
498 free_tx:
499         vnt_free_tx_bufs(priv);
500 
501         return false;
502 }
503 
504 static void vnt_tx_80211(struct ieee80211_hw *hw,
505         struct ieee80211_tx_control *control, struct sk_buff *skb)
506 {
507         struct vnt_private *priv = hw->priv;
508 
509         ieee80211_stop_queues(hw);
510 
511         if (vnt_tx_packet(priv, skb)) {
512                 ieee80211_free_txskb(hw, skb);
513 
514                 ieee80211_wake_queues(hw);
515         }
516 }
517 
518 static int vnt_start(struct ieee80211_hw *hw)
519 {
520         struct vnt_private *priv = hw->priv;
521 
522         priv->rx_buf_sz = MAX_TOTAL_SIZE_WITH_ALL_HEADERS;
523 
524         if (vnt_alloc_bufs(priv) == false) {
525                 dev_dbg(&priv->usb->dev, "vnt_alloc_bufs fail...\n");
526                 return -ENOMEM;
527         }
528 
529         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
530 
531         if (vnt_init_registers(priv) == false) {
532                 dev_dbg(&priv->usb->dev, " init register fail\n");
533                 goto free_all;
534         }
535 
536         priv->int_interval = 1;  /* bInterval is set to 1 */
537 
538         vnt_int_start_interrupt(priv);
539 
540         ieee80211_wake_queues(hw);
541 
542         return 0;
543 
544 free_all:
545         vnt_free_rx_bufs(priv);
546         vnt_free_tx_bufs(priv);
547         vnt_free_int_bufs(priv);
548 
549         usb_kill_urb(priv->interrupt_urb);
550         usb_free_urb(priv->interrupt_urb);
551 
552         return -ENOMEM;
553 }
554 
555 static void vnt_stop(struct ieee80211_hw *hw)
556 {
557         struct vnt_private *priv = hw->priv;
558         int i;
559 
560         if (!priv)
561                 return;
562 
563         for (i = 0; i < MAX_KEY_TABLE; i++)
564                 vnt_mac_disable_keyentry(priv, i);
565 
566         /* clear all keys */
567         priv->key_entry_inuse = 0;
568 
569         if (!test_bit(DEVICE_FLAGS_UNPLUG, &priv->flags))
570                 vnt_mac_shutdown(priv);
571 
572         ieee80211_stop_queues(hw);
573 
574         set_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
575 
576         cancel_delayed_work_sync(&priv->run_command_work);
577 
578         priv->cmd_running = false;
579 
580         vnt_free_tx_bufs(priv);
581         vnt_free_rx_bufs(priv);
582         vnt_free_int_bufs(priv);
583 
584         usb_kill_urb(priv->interrupt_urb);
585         usb_free_urb(priv->interrupt_urb);
586 }
587 
588 static int vnt_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
589 {
590         struct vnt_private *priv = hw->priv;
591 
592         priv->vif = vif;
593 
594         switch (vif->type) {
595         case NL80211_IFTYPE_STATION:
596                 break;
597         case NL80211_IFTYPE_ADHOC:
598                 vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
599 
600                 vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
601 
602                 break;
603         case NL80211_IFTYPE_AP:
604                 vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
605 
606                 vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_AP);
607 
608                 break;
609         default:
610                 return -EOPNOTSUPP;
611         }
612 
613         priv->op_mode = vif->type;
614 
615         vnt_set_bss_mode(priv);
616 
617         /* LED blink on TX */
618         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_INTER);
619 
620         return 0;
621 }
622 
623 static void vnt_remove_interface(struct ieee80211_hw *hw,
624                 struct ieee80211_vif *vif)
625 {
626         struct vnt_private *priv = hw->priv;
627 
628         switch (vif->type) {
629         case NL80211_IFTYPE_STATION:
630                 break;
631         case NL80211_IFTYPE_ADHOC:
632                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
633                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
634                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
635                 break;
636         case NL80211_IFTYPE_AP:
637                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
638                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
639                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_AP);
640                 break;
641         default:
642                 break;
643         }
644 
645         vnt_radio_power_off(priv);
646 
647         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
648 
649         /* LED slow blink */
650         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_SLOW);
651 }
652 
653 static int vnt_config(struct ieee80211_hw *hw, u32 changed)
654 {
655         struct vnt_private *priv = hw->priv;
656         struct ieee80211_conf *conf = &hw->conf;
657         u8 bb_type;
658 
659         if (changed & IEEE80211_CONF_CHANGE_PS) {
660                 if (conf->flags & IEEE80211_CONF_PS)
661                         vnt_enable_power_saving(priv, conf->listen_interval);
662                 else
663                         vnt_disable_power_saving(priv);
664         }
665 
666         if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) ||
667                         (conf->flags & IEEE80211_CONF_OFFCHANNEL)) {
668                 vnt_set_channel(priv, conf->chandef.chan->hw_value);
669 
670                 if (conf->chandef.chan->band == IEEE80211_BAND_5GHZ)
671                         bb_type = BB_TYPE_11A;
672                 else
673                         bb_type = BB_TYPE_11G;
674 
675                 if (priv->bb_type != bb_type) {
676                         priv->bb_type = bb_type;
677 
678                         vnt_set_bss_mode(priv);
679                 }
680         }
681 
682         if (changed & IEEE80211_CONF_CHANGE_POWER) {
683                 if (priv->bb_type == BB_TYPE_11B)
684                         priv->current_rate = RATE_1M;
685                 else
686                         priv->current_rate = RATE_54M;
687 
688                 vnt_rf_setpower(priv, priv->current_rate,
689                                 conf->chandef.chan->hw_value);
690         }
691 
692         return 0;
693 }
694 
695 static void vnt_bss_info_changed(struct ieee80211_hw *hw,
696                 struct ieee80211_vif *vif, struct ieee80211_bss_conf *conf,
697                 u32 changed)
698 {
699         struct vnt_private *priv = hw->priv;
700 
701         priv->current_aid = conf->aid;
702 
703         if (changed & BSS_CHANGED_BSSID)
704                 vnt_mac_set_bssid_addr(priv, (u8 *)conf->bssid);
705 
706 
707         if (changed & BSS_CHANGED_BASIC_RATES) {
708                 priv->basic_rates = conf->basic_rates;
709 
710                 vnt_update_top_rates(priv);
711 
712                 dev_dbg(&priv->usb->dev, "basic rates %x\n", conf->basic_rates);
713         }
714 
715         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
716                 if (conf->use_short_preamble) {
717                         vnt_mac_enable_barker_preamble_mode(priv);
718                         priv->preamble_type = true;
719                 } else {
720                         vnt_mac_disable_barker_preamble_mode(priv);
721                         priv->preamble_type = false;
722                 }
723         }
724 
725         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
726                 if (conf->use_cts_prot)
727                         vnt_mac_enable_protect_mode(priv);
728                 else
729                         vnt_mac_disable_protect_mode(priv);
730         }
731 
732         if (changed & BSS_CHANGED_ERP_SLOT) {
733                 if (conf->use_short_slot)
734                         priv->short_slot_time = true;
735                 else
736                         priv->short_slot_time = false;
737 
738                 vnt_set_short_slot_time(priv);
739                 vnt_set_vga_gain_offset(priv, priv->bb_vga[0]);
740                 vnt_update_pre_ed_threshold(priv, false);
741         }
742 
743         if (changed & BSS_CHANGED_TXPOWER)
744                 vnt_rf_setpower(priv, priv->current_rate,
745                                         conf->chandef.chan->hw_value);
746 
747         if (changed & BSS_CHANGED_BEACON_ENABLED) {
748                 dev_dbg(&priv->usb->dev,
749                                 "Beacon enable %d\n", conf->enable_beacon);
750 
751                 if (conf->enable_beacon) {
752                         vnt_beacon_enable(priv, vif, conf);
753 
754                         vnt_mac_reg_bits_on(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
755                 } else {
756                         vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
757                 }
758         }
759 }
760 
761 static u64 vnt_prepare_multicast(struct ieee80211_hw *hw,
762         struct netdev_hw_addr_list *mc_list)
763 {
764         struct vnt_private *priv = hw->priv;
765         struct netdev_hw_addr *ha;
766         u64 mc_filter = 0;
767         u32 bit_nr = 0;
768 
769         netdev_hw_addr_list_for_each(ha, mc_list) {
770                 bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
771 
772                 mc_filter |= 1ULL << (bit_nr & 0x3f);
773         }
774 
775         priv->mc_list_count = mc_list->count;
776 
777         return mc_filter;
778 }
779 
780 static void vnt_configure(struct ieee80211_hw *hw,
781         unsigned int changed_flags, unsigned int *total_flags, u64 multicast)
782 {
783         struct vnt_private *priv = hw->priv;
784         u8 rx_mode = 0;
785         int rc;
786 
787         *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS | FIF_PROMISC_IN_BSS |
788                 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_PROMISC_IN_BSS) {
799                 /* unconditionally log net taps */
800                 if (*total_flags & FIF_PROMISC_IN_BSS)
801                         rx_mode |= RCR_UNICAST;
802                 else
803                         rx_mode &= ~RCR_UNICAST;
804         }
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                 goto err_nomem;
966         }
967 
968         priv = hw->priv;
969         priv->hw = hw;
970         priv->usb = udev;
971 
972         vnt_set_options(priv);
973 
974         spin_lock_init(&priv->lock);
975         mutex_init(&priv->usb_lock);
976 
977         INIT_DELAYED_WORK(&priv->run_command_work, vnt_run_command);
978 
979         usb_set_intfdata(intf, priv);
980 
981         wiphy = priv->hw->wiphy;
982 
983         wiphy->frag_threshold = FRAG_THRESH_DEF;
984         wiphy->rts_threshold = RTS_THRESH_DEF;
985         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
986                 BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP);
987 
988         priv->hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
989                 IEEE80211_HW_REPORTS_TX_ACK_STATUS |
990                 IEEE80211_HW_SIGNAL_DBM |
991                 IEEE80211_HW_TIMING_BEACON_ONLY;
992 
993         priv->hw->max_signal = 100;
994 
995         SET_IEEE80211_DEV(priv->hw, &intf->dev);
996 
997         usb_device_reset(priv);
998 
999         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
1000         vnt_reset_command_timer(priv);
1001 
1002         vnt_schedule_command(priv, WLAN_CMD_INIT_MAC80211);
1003 
1004         return 0;
1005 
1006 err_nomem:
1007         usb_put_dev(udev);
1008 
1009         return rc;
1010 }
1011 
1012 static void vt6656_disconnect(struct usb_interface *intf)
1013 {
1014         struct vnt_private *priv = usb_get_intfdata(intf);
1015 
1016         if (!priv)
1017                 return;
1018 
1019         if (priv->mac_hw)
1020                 ieee80211_unregister_hw(priv->hw);
1021 
1022         usb_set_intfdata(intf, NULL);
1023         usb_put_dev(interface_to_usbdev(intf));
1024 
1025         set_bit(DEVICE_FLAGS_UNPLUG, &priv->flags);
1026 
1027         ieee80211_free_hw(priv->hw);
1028 }
1029 
1030 #ifdef CONFIG_PM
1031 
1032 static int vt6656_suspend(struct usb_interface *intf, pm_message_t message)
1033 {
1034         return 0;
1035 }
1036 
1037 static int vt6656_resume(struct usb_interface *intf)
1038 {
1039         return 0;
1040 }
1041 
1042 #endif /* CONFIG_PM */
1043 
1044 MODULE_DEVICE_TABLE(usb, vt6656_table);
1045 
1046 static struct usb_driver vt6656_driver = {
1047         .name =         DEVICE_NAME,
1048         .probe =        vt6656_probe,
1049         .disconnect =   vt6656_disconnect,
1050         .id_table =     vt6656_table,
1051 #ifdef CONFIG_PM
1052         .suspend = vt6656_suspend,
1053         .resume = vt6656_resume,
1054 #endif /* CONFIG_PM */
1055 };
1056 
1057 module_usb_driver(vt6656_driver);
1058 

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