Version:  2.0.40 2.2.26 2.4.37 3.2 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

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                         dev_err(&priv->usb->dev,
436                                         "allocate tx usb context failed\n");
437                         goto free_tx;
438                 }
439 
440                 priv->tx_context[ii] = tx_context;
441                 tx_context->priv = priv;
442                 tx_context->pkt_no = ii;
443 
444                 /* allocate URBs */
445                 tx_context->urb = usb_alloc_urb(0, GFP_ATOMIC);
446                 if (!tx_context->urb) {
447                         dev_err(&priv->usb->dev, "alloc tx urb failed\n");
448                         goto free_tx;
449                 }
450 
451                 tx_context->in_use = false;
452         }
453 
454         for (ii = 0; ii < priv->num_rcb; ii++) {
455                 priv->rcb[ii] = kzalloc(sizeof(struct vnt_rcb), GFP_KERNEL);
456                 if (!priv->rcb[ii]) {
457                         dev_err(&priv->usb->dev,
458                                         "failed to allocate rcb no %d\n", ii);
459                         goto free_rx_tx;
460                 }
461 
462                 rcb = priv->rcb[ii];
463 
464                 rcb->priv = priv;
465 
466                 /* allocate URBs */
467                 rcb->urb = usb_alloc_urb(0, GFP_ATOMIC);
468                 if (rcb->urb == NULL) {
469                         dev_err(&priv->usb->dev, "Failed to alloc rx urb\n");
470                         goto free_rx_tx;
471                 }
472 
473                 rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
474                 if (rcb->skb == NULL) {
475                         dev_err(&priv->usb->dev, "Failed to alloc rx skb\n");
476                         goto free_rx_tx;
477                 }
478 
479                 rcb->in_use = false;
480 
481                 /* submit rx urb */
482                 if (vnt_submit_rx_urb(priv, rcb))
483                         goto free_rx_tx;
484         }
485 
486         priv->interrupt_urb = usb_alloc_urb(0, GFP_ATOMIC);
487         if (priv->interrupt_urb == NULL) {
488                 dev_err(&priv->usb->dev, "Failed to alloc int urb\n");
489                 goto free_rx_tx;
490         }
491 
492         priv->int_buf.data_buf = kmalloc(MAX_INTERRUPT_SIZE, GFP_KERNEL);
493         if (priv->int_buf.data_buf == NULL) {
494                 dev_err(&priv->usb->dev, "Failed to alloc int buf\n");
495                 usb_free_urb(priv->interrupt_urb);
496                 goto free_rx_tx;
497         }
498 
499         return true;
500 
501 free_rx_tx:
502         vnt_free_rx_bufs(priv);
503 
504 free_tx:
505         vnt_free_tx_bufs(priv);
506 
507         return false;
508 }
509 
510 static void vnt_tx_80211(struct ieee80211_hw *hw,
511         struct ieee80211_tx_control *control, struct sk_buff *skb)
512 {
513         struct vnt_private *priv = hw->priv;
514 
515         ieee80211_stop_queues(hw);
516 
517         if (vnt_tx_packet(priv, skb)) {
518                 ieee80211_free_txskb(hw, skb);
519 
520                 ieee80211_wake_queues(hw);
521         }
522 }
523 
524 static int vnt_start(struct ieee80211_hw *hw)
525 {
526         struct vnt_private *priv = hw->priv;
527 
528         priv->rx_buf_sz = MAX_TOTAL_SIZE_WITH_ALL_HEADERS;
529 
530         if (vnt_alloc_bufs(priv) == false) {
531                 dev_dbg(&priv->usb->dev, "vnt_alloc_bufs fail...\n");
532                 return -ENOMEM;
533         }
534 
535         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
536 
537         if (vnt_init_registers(priv) == false) {
538                 dev_dbg(&priv->usb->dev, " init register fail\n");
539                 goto free_all;
540         }
541 
542         priv->int_interval = 1;  /* bInterval is set to 1 */
543 
544         vnt_int_start_interrupt(priv);
545 
546         ieee80211_wake_queues(hw);
547 
548         return 0;
549 
550 free_all:
551         vnt_free_rx_bufs(priv);
552         vnt_free_tx_bufs(priv);
553         vnt_free_int_bufs(priv);
554 
555         usb_kill_urb(priv->interrupt_urb);
556         usb_free_urb(priv->interrupt_urb);
557 
558         return -ENOMEM;
559 }
560 
561 static void vnt_stop(struct ieee80211_hw *hw)
562 {
563         struct vnt_private *priv = hw->priv;
564         int i;
565 
566         if (!priv)
567                 return;
568 
569         for (i = 0; i < MAX_KEY_TABLE; i++)
570                 vnt_mac_disable_keyentry(priv, i);
571 
572         /* clear all keys */
573         priv->key_entry_inuse = 0;
574 
575         if (!test_bit(DEVICE_FLAGS_UNPLUG, &priv->flags))
576                 vnt_mac_shutdown(priv);
577 
578         ieee80211_stop_queues(hw);
579 
580         set_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
581 
582         cancel_delayed_work_sync(&priv->run_command_work);
583 
584         priv->cmd_running = false;
585 
586         vnt_free_tx_bufs(priv);
587         vnt_free_rx_bufs(priv);
588         vnt_free_int_bufs(priv);
589 
590         usb_kill_urb(priv->interrupt_urb);
591         usb_free_urb(priv->interrupt_urb);
592 }
593 
594 static int vnt_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
595 {
596         struct vnt_private *priv = hw->priv;
597 
598         priv->vif = vif;
599 
600         switch (vif->type) {
601         case NL80211_IFTYPE_STATION:
602                 break;
603         case NL80211_IFTYPE_ADHOC:
604                 vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
605 
606                 vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
607 
608                 break;
609         case NL80211_IFTYPE_AP:
610                 vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
611 
612                 vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_AP);
613 
614                 break;
615         default:
616                 return -EOPNOTSUPP;
617         }
618 
619         priv->op_mode = vif->type;
620 
621         vnt_set_bss_mode(priv);
622 
623         /* LED blink on TX */
624         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_INTER);
625 
626         return 0;
627 }
628 
629 static void vnt_remove_interface(struct ieee80211_hw *hw,
630                 struct ieee80211_vif *vif)
631 {
632         struct vnt_private *priv = hw->priv;
633 
634         switch (vif->type) {
635         case NL80211_IFTYPE_STATION:
636                 break;
637         case NL80211_IFTYPE_ADHOC:
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_ADHOC);
641                 break;
642         case NL80211_IFTYPE_AP:
643                 vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
644                 vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
645                 vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_AP);
646                 break;
647         default:
648                 break;
649         }
650 
651         vnt_radio_power_off(priv);
652 
653         priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
654 
655         /* LED slow blink */
656         vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_SLOW);
657 }
658 
659 static int vnt_config(struct ieee80211_hw *hw, u32 changed)
660 {
661         struct vnt_private *priv = hw->priv;
662         struct ieee80211_conf *conf = &hw->conf;
663         u8 bb_type;
664 
665         if (changed & IEEE80211_CONF_CHANGE_PS) {
666                 if (conf->flags & IEEE80211_CONF_PS)
667                         vnt_enable_power_saving(priv, conf->listen_interval);
668                 else
669                         vnt_disable_power_saving(priv);
670         }
671 
672         if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) ||
673                         (conf->flags & IEEE80211_CONF_OFFCHANNEL)) {
674                 vnt_set_channel(priv, conf->chandef.chan->hw_value);
675 
676                 if (conf->chandef.chan->band == IEEE80211_BAND_5GHZ)
677                         bb_type = BB_TYPE_11A;
678                 else
679                         bb_type = BB_TYPE_11G;
680 
681                 if (priv->bb_type != bb_type) {
682                         priv->bb_type = bb_type;
683 
684                         vnt_set_bss_mode(priv);
685                 }
686         }
687 
688         if (changed & IEEE80211_CONF_CHANGE_POWER) {
689                 if (priv->bb_type == BB_TYPE_11B)
690                         priv->current_rate = RATE_1M;
691                 else
692                         priv->current_rate = RATE_54M;
693 
694                 vnt_rf_setpower(priv, priv->current_rate,
695                                 conf->chandef.chan->hw_value);
696         }
697 
698         return 0;
699 }
700 
701 static void vnt_bss_info_changed(struct ieee80211_hw *hw,
702                 struct ieee80211_vif *vif, struct ieee80211_bss_conf *conf,
703                 u32 changed)
704 {
705         struct vnt_private *priv = hw->priv;
706 
707         priv->current_aid = conf->aid;
708 
709         if (changed & BSS_CHANGED_BSSID)
710                 vnt_mac_set_bssid_addr(priv, (u8 *)conf->bssid);
711 
712 
713         if (changed & BSS_CHANGED_BASIC_RATES) {
714                 priv->basic_rates = conf->basic_rates;
715 
716                 vnt_update_top_rates(priv);
717 
718                 dev_dbg(&priv->usb->dev, "basic rates %x\n", conf->basic_rates);
719         }
720 
721         if (changed & BSS_CHANGED_ERP_PREAMBLE) {
722                 if (conf->use_short_preamble) {
723                         vnt_mac_enable_barker_preamble_mode(priv);
724                         priv->preamble_type = true;
725                 } else {
726                         vnt_mac_disable_barker_preamble_mode(priv);
727                         priv->preamble_type = false;
728                 }
729         }
730 
731         if (changed & BSS_CHANGED_ERP_CTS_PROT) {
732                 if (conf->use_cts_prot)
733                         vnt_mac_enable_protect_mode(priv);
734                 else
735                         vnt_mac_disable_protect_mode(priv);
736         }
737 
738         if (changed & BSS_CHANGED_ERP_SLOT) {
739                 if (conf->use_short_slot)
740                         priv->short_slot_time = true;
741                 else
742                         priv->short_slot_time = false;
743 
744                 vnt_set_short_slot_time(priv);
745                 vnt_set_vga_gain_offset(priv, priv->bb_vga[0]);
746                 vnt_update_pre_ed_threshold(priv, false);
747         }
748 
749         if (changed & BSS_CHANGED_TXPOWER)
750                 vnt_rf_setpower(priv, priv->current_rate,
751                                         conf->chandef.chan->hw_value);
752 
753         if (changed & BSS_CHANGED_BEACON_ENABLED) {
754                 dev_dbg(&priv->usb->dev,
755                                 "Beacon enable %d\n", conf->enable_beacon);
756 
757                 if (conf->enable_beacon) {
758                         vnt_beacon_enable(priv, vif, conf);
759 
760                         vnt_mac_reg_bits_on(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
761                 } else {
762                         vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
763                 }
764         }
765 }
766 
767 static u64 vnt_prepare_multicast(struct ieee80211_hw *hw,
768         struct netdev_hw_addr_list *mc_list)
769 {
770         struct vnt_private *priv = hw->priv;
771         struct netdev_hw_addr *ha;
772         u64 mc_filter = 0;
773         u32 bit_nr = 0;
774 
775         netdev_hw_addr_list_for_each(ha, mc_list) {
776                 bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
777 
778                 mc_filter |= 1ULL << (bit_nr & 0x3f);
779         }
780 
781         priv->mc_list_count = mc_list->count;
782 
783         return mc_filter;
784 }
785 
786 static void vnt_configure(struct ieee80211_hw *hw,
787         unsigned int changed_flags, unsigned int *total_flags, u64 multicast)
788 {
789         struct vnt_private *priv = hw->priv;
790         u8 rx_mode = 0;
791         int rc;
792 
793         *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS | FIF_PROMISC_IN_BSS |
794                 FIF_BCN_PRBRESP_PROMISC;
795 
796         rc = vnt_control_in(priv, MESSAGE_TYPE_READ, MAC_REG_RCR,
797                 MESSAGE_REQUEST_MACREG, sizeof(u8), &rx_mode);
798 
799         if (!rc)
800                 rx_mode = RCR_MULTICAST | RCR_BROADCAST;
801 
802         dev_dbg(&priv->usb->dev, "rx mode in = %x\n", rx_mode);
803 
804         if (changed_flags & FIF_PROMISC_IN_BSS) {
805                 /* unconditionally log net taps */
806                 if (*total_flags & FIF_PROMISC_IN_BSS)
807                         rx_mode |= RCR_UNICAST;
808                 else
809                         rx_mode &= ~RCR_UNICAST;
810         }
811 
812         if (changed_flags & FIF_ALLMULTI) {
813                 if (*total_flags & FIF_ALLMULTI) {
814                         if (priv->mc_list_count > 2)
815                                 vnt_mac_set_filter(priv, ~0);
816                         else
817                                 vnt_mac_set_filter(priv, multicast);
818 
819                         rx_mode |= RCR_MULTICAST | RCR_BROADCAST;
820                 } else {
821                         rx_mode &= ~(RCR_MULTICAST | RCR_BROADCAST);
822                 }
823 
824         }
825 
826         if (changed_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC)) {
827                 if (*total_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC))
828                         rx_mode &= ~RCR_BSSID;
829                 else
830                         rx_mode |= RCR_BSSID;
831         }
832 
833         vnt_control_out_u8(priv, MESSAGE_REQUEST_MACREG, MAC_REG_RCR, rx_mode);
834 
835         dev_dbg(&priv->usb->dev, "rx mode out= %x\n", rx_mode);
836 }
837 
838 static int vnt_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
839         struct ieee80211_vif *vif, struct ieee80211_sta *sta,
840                 struct ieee80211_key_conf *key)
841 {
842         struct vnt_private *priv = hw->priv;
843 
844         switch (cmd) {
845         case SET_KEY:
846                 if (vnt_set_keys(hw, sta, vif, key))
847                         return -EOPNOTSUPP;
848                 break;
849         case DISABLE_KEY:
850                 if (test_bit(key->hw_key_idx, &priv->key_entry_inuse))
851                         clear_bit(key->hw_key_idx, &priv->key_entry_inuse);
852         default:
853                 break;
854         }
855 
856         return 0;
857 }
858 
859 static void vnt_sw_scan_start(struct ieee80211_hw *hw)
860 {
861         struct vnt_private *priv = hw->priv;
862 
863         vnt_set_bss_mode(priv);
864         /* Set max sensitivity*/
865         vnt_update_pre_ed_threshold(priv, true);
866 }
867 
868 static void vnt_sw_scan_complete(struct ieee80211_hw *hw)
869 {
870         struct vnt_private *priv = hw->priv;
871 
872         /* Return sensitivity to channel level*/
873         vnt_update_pre_ed_threshold(priv, false);
874 }
875 
876 static int vnt_get_stats(struct ieee80211_hw *hw,
877                                 struct ieee80211_low_level_stats *stats)
878 {
879         struct vnt_private *priv = hw->priv;
880 
881         memcpy(stats, &priv->low_stats, sizeof(*stats));
882 
883         return 0;
884 }
885 
886 static u64 vnt_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
887 {
888         struct vnt_private *priv = hw->priv;
889 
890         return priv->current_tsf;
891 }
892 
893 static void vnt_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
894                         u64 tsf)
895 {
896         struct vnt_private *priv = hw->priv;
897 
898         vnt_update_next_tbtt(priv, tsf, vif->bss_conf.beacon_int);
899 }
900 
901 static void vnt_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
902 {
903         struct vnt_private *priv = hw->priv;
904 
905         vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
906 
907         vnt_clear_current_tsf(priv);
908 }
909 
910 static const struct ieee80211_ops vnt_mac_ops = {
911         .tx                     = vnt_tx_80211,
912         .start                  = vnt_start,
913         .stop                   = vnt_stop,
914         .add_interface          = vnt_add_interface,
915         .remove_interface       = vnt_remove_interface,
916         .config                 = vnt_config,
917         .bss_info_changed       = vnt_bss_info_changed,
918         .prepare_multicast      = vnt_prepare_multicast,
919         .configure_filter       = vnt_configure,
920         .set_key                = vnt_set_key,
921         .sw_scan_start          = vnt_sw_scan_start,
922         .sw_scan_complete       = vnt_sw_scan_complete,
923         .get_stats              = vnt_get_stats,
924         .get_tsf                = vnt_get_tsf,
925         .set_tsf                = vnt_set_tsf,
926         .reset_tsf              = vnt_reset_tsf,
927 };
928 
929 int vnt_init(struct vnt_private *priv)
930 {
931 
932         if (!(vnt_init_registers(priv)))
933                 return -EAGAIN;
934 
935         SET_IEEE80211_PERM_ADDR(priv->hw, priv->permanent_net_addr);
936 
937         vnt_init_bands(priv);
938 
939         if (ieee80211_register_hw(priv->hw))
940                 return -ENODEV;
941 
942         priv->mac_hw = true;
943 
944         vnt_radio_power_off(priv);
945 
946         return 0;
947 }
948 
949 static int
950 vt6656_probe(struct usb_interface *intf, const struct usb_device_id *id)
951 {
952         struct usb_device *udev;
953         struct vnt_private *priv;
954         struct ieee80211_hw *hw;
955         struct wiphy *wiphy;
956         int rc = 0;
957 
958         udev = usb_get_dev(interface_to_usbdev(intf));
959 
960         dev_notice(&udev->dev, "%s Ver. %s\n",
961                                         DEVICE_FULL_DRV_NAM, DEVICE_VERSION);
962         dev_notice(&udev->dev,
963                 "Copyright (c) 2004 VIA Networking Technologies, Inc.\n");
964 
965         hw = ieee80211_alloc_hw(sizeof(struct vnt_private), &vnt_mac_ops);
966         if (!hw) {
967                 dev_err(&udev->dev, "could not register ieee80211_hw\n");
968                 goto err_nomem;
969         }
970 
971         priv = hw->priv;
972         priv->hw = hw;
973         priv->usb = udev;
974 
975         vnt_set_options(priv);
976 
977         spin_lock_init(&priv->lock);
978         mutex_init(&priv->usb_lock);
979 
980         INIT_DELAYED_WORK(&priv->run_command_work, vnt_run_command);
981 
982         usb_set_intfdata(intf, priv);
983 
984         wiphy = priv->hw->wiphy;
985 
986         wiphy->frag_threshold = FRAG_THRESH_DEF;
987         wiphy->rts_threshold = RTS_THRESH_DEF;
988         wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
989                 BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP);
990 
991         priv->hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
992                 IEEE80211_HW_REPORTS_TX_ACK_STATUS |
993                 IEEE80211_HW_SIGNAL_DBM |
994                 IEEE80211_HW_TIMING_BEACON_ONLY;
995 
996         priv->hw->max_signal = 100;
997 
998         SET_IEEE80211_DEV(priv->hw, &intf->dev);
999 
1000         usb_device_reset(priv);
1001 
1002         clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
1003         vnt_reset_command_timer(priv);
1004 
1005         vnt_schedule_command(priv, WLAN_CMD_INIT_MAC80211);
1006 
1007         return 0;
1008 
1009 err_nomem:
1010         usb_put_dev(udev);
1011 
1012         return rc;
1013 }
1014 
1015 static void vt6656_disconnect(struct usb_interface *intf)
1016 {
1017         struct vnt_private *priv = usb_get_intfdata(intf);
1018 
1019         if (!priv)
1020                 return;
1021 
1022         if (priv->mac_hw)
1023                 ieee80211_unregister_hw(priv->hw);
1024 
1025         usb_set_intfdata(intf, NULL);
1026         usb_put_dev(interface_to_usbdev(intf));
1027 
1028         set_bit(DEVICE_FLAGS_UNPLUG, &priv->flags);
1029 
1030         ieee80211_free_hw(priv->hw);
1031 }
1032 
1033 #ifdef CONFIG_PM
1034 
1035 static int vt6656_suspend(struct usb_interface *intf, pm_message_t message)
1036 {
1037         return 0;
1038 }
1039 
1040 static int vt6656_resume(struct usb_interface *intf)
1041 {
1042         return 0;
1043 }
1044 
1045 #endif /* CONFIG_PM */
1046 
1047 MODULE_DEVICE_TABLE(usb, vt6656_table);
1048 
1049 static struct usb_driver vt6656_driver = {
1050         .name =         DEVICE_NAME,
1051         .probe =        vt6656_probe,
1052         .disconnect =   vt6656_disconnect,
1053         .id_table =     vt6656_table,
1054 #ifdef CONFIG_PM
1055         .suspend = vt6656_suspend,
1056         .resume = vt6656_resume,
1057 #endif /* CONFIG_PM */
1058 };
1059 
1060 module_usb_driver(vt6656_driver);
1061 

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