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OSCL-LXR
 
 

     

0001 // SPDX-License-Identifier: GPL-2.0+
0002 /*
0003  * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
0004  * All rights reserved.
0005  *
0006  * Purpose: driver entry for initial, open, close, tx and rx.
0007  *
0008  * Author: Lyndon Chen
0009  *
0010  * Date: Dec 8, 2005
0011  *
0012  * Functions:
0013  *
0014  *   vt6656_probe - module initial (insmod) driver entry
0015  *   vnt_free_tx_bufs - free tx buffer function
0016  *   vnt_init_registers- initial MAC & BBP & RF internal registers.
0017  *
0018  * Revision History:
0019  */
0020 #undef __NO_VERSION__
0021 
0022 #include <linux/bits.h>
0023 #include <linux/etherdevice.h>
0024 #include <linux/file.h>
0025 #include <linux/kernel.h>
0026 #include "device.h"
0027 #include "card.h"
0028 #include "baseband.h"
0029 #include "mac.h"
0030 #include "power.h"
0031 #include "wcmd.h"
0032 #include "rxtx.h"
0033 #include "rf.h"
0034 #include "usbpipe.h"
0035 #include "channel.h"
0036 
0037 /*
0038  * define module options
0039  */
0040 
0041 /* version information */
0042 #define DRIVER_AUTHOR \
0043     "VIA Networking Technologies, Inc., <lyndonchen@vntek.com.tw>"
0044 MODULE_AUTHOR(DRIVER_AUTHOR);
0045 MODULE_LICENSE("GPL");
0046 MODULE_DESCRIPTION(DEVICE_FULL_DRV_NAM);
0047 
0048 #define RX_DESC_DEF0 64
0049 static int vnt_rx_buffers = RX_DESC_DEF0;
0050 module_param_named(rx_buffers, vnt_rx_buffers, int, 0644);
0051 MODULE_PARM_DESC(rx_buffers, "Number of receive usb rx buffers");
0052 
0053 #define TX_DESC_DEF0 64
0054 static int vnt_tx_buffers = TX_DESC_DEF0;
0055 module_param_named(tx_buffers, vnt_tx_buffers, int, 0644);
0056 MODULE_PARM_DESC(tx_buffers, "Number of receive usb tx buffers");
0057 
0058 #define RTS_THRESH_DEF     2347
0059 #define FRAG_THRESH_DEF     2346
0060 
0061 /* BasebandType[] baseband type selected
0062  * 0: indicate 802.11a type
0063  * 1: indicate 802.11b type
0064  * 2: indicate 802.11g type
0065  */
0066 
0067 #define BBP_TYPE_DEF     2
0068 
0069 /*
0070  * Static vars definitions
0071  */
0072 
0073 static const struct usb_device_id vt6656_table[] = {
0074     {USB_DEVICE(VNT_USB_VENDOR_ID, VNT_USB_PRODUCT_ID)},
0075     {}
0076 };
0077 
0078 static void vnt_set_options(struct vnt_private *priv)
0079 {
0080     /* Set number of TX buffers */
0081     if (vnt_tx_buffers < CB_MIN_TX_DESC || vnt_tx_buffers > CB_MAX_TX_DESC)
0082         priv->num_tx_context = TX_DESC_DEF0;
0083     else
0084         priv->num_tx_context = vnt_tx_buffers;
0085 
0086     /* Set number of RX buffers */
0087     if (vnt_rx_buffers < CB_MIN_RX_DESC || vnt_rx_buffers > CB_MAX_RX_DESC)
0088         priv->num_rcb = RX_DESC_DEF0;
0089     else
0090         priv->num_rcb = vnt_rx_buffers;
0091 
0092     priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
0093     priv->bb_type = BBP_TYPE_DEF;
0094     priv->packet_type = priv->bb_type;
0095     priv->preamble_type = PREAMBLE_LONG;
0096     priv->exist_sw_net_addr = false;
0097 }
0098 
0099 static int vnt_download_firmware(struct vnt_private *priv)
0100 {
0101     struct device *dev = &priv->usb->dev;
0102     const struct firmware *fw;
0103     u16 length;
0104     int ii;
0105     int ret = 0;
0106 
0107     dev_dbg(dev, "---->Download firmware\n");
0108 
0109     ret = request_firmware(&fw, FIRMWARE_NAME, dev);
0110     if (ret) {
0111         dev_err(dev, "firmware file %s request failed (%d)\n",
0112             FIRMWARE_NAME, ret);
0113         goto end;
0114     }
0115 
0116     for (ii = 0; ii < fw->size; ii += FIRMWARE_CHUNK_SIZE) {
0117         length = min_t(int, fw->size - ii, FIRMWARE_CHUNK_SIZE);
0118 
0119         ret = vnt_control_out(priv, 0, 0x1200 + ii, 0x0000, length,
0120                       fw->data + ii);
0121         if (ret)
0122             goto free_fw;
0123 
0124         dev_dbg(dev, "Download firmware...%d %zu\n", ii, fw->size);
0125     }
0126 
0127 free_fw:
0128     release_firmware(fw);
0129 end:
0130     return ret;
0131 }
0132 
0133 static int vnt_firmware_branch_to_sram(struct vnt_private *priv)
0134 {
0135     dev_dbg(&priv->usb->dev, "---->Branch to Sram\n");
0136 
0137     return vnt_control_out(priv, 1, 0x1200, 0x0000, 0, NULL);
0138 }
0139 
0140 static int vnt_check_firmware_version(struct vnt_private *priv)
0141 {
0142     int ret = 0;
0143 
0144     ret = vnt_control_in(priv, MESSAGE_TYPE_READ, 0,
0145                  MESSAGE_REQUEST_VERSION, 2,
0146                  (u8 *)&priv->firmware_version);
0147     if (ret) {
0148         dev_dbg(&priv->usb->dev,
0149             "Could not get firmware version: %d.\n", ret);
0150         goto end;
0151     }
0152 
0153     dev_dbg(&priv->usb->dev, "Firmware Version [%04x]\n",
0154         priv->firmware_version);
0155 
0156     if (priv->firmware_version == 0xFFFF) {
0157         dev_dbg(&priv->usb->dev, "In Loader.\n");
0158         ret = -EINVAL;
0159         goto end;
0160     }
0161 
0162     if (priv->firmware_version < FIRMWARE_VERSION) {
0163         /* branch to loader for download new firmware */
0164         ret = vnt_firmware_branch_to_sram(priv);
0165         if (ret) {
0166             dev_dbg(&priv->usb->dev,
0167                 "Could not branch to SRAM: %d.\n", ret);
0168         } else {
0169             ret = -EINVAL;
0170         }
0171     }
0172 
0173 end:
0174     return ret;
0175 }
0176 
0177 /*
0178  * initialization of MAC & BBP registers
0179  */
0180 static int vnt_init_registers(struct vnt_private *priv)
0181 {
0182     int ret;
0183     struct vnt_cmd_card_init *init_cmd = &priv->init_command;
0184     struct vnt_rsp_card_init *init_rsp = &priv->init_response;
0185     u8 antenna;
0186     int ii;
0187     u8 tmp;
0188     u8 calib_tx_iq = 0, calib_tx_dc = 0, calib_rx_iq = 0;
0189 
0190     dev_dbg(&priv->usb->dev, "---->INIbInitAdapter. [%d][%d]\n",
0191         DEVICE_INIT_COLD, priv->packet_type);
0192 
0193     ret = vnt_check_firmware_version(priv);
0194     if (ret) {
0195         ret = vnt_download_firmware(priv);
0196         if (ret) {
0197             dev_dbg(&priv->usb->dev,
0198                 "Could not download firmware: %d.\n", ret);
0199             goto end;
0200         }
0201 
0202         ret = vnt_firmware_branch_to_sram(priv);
0203         if (ret) {
0204             dev_dbg(&priv->usb->dev,
0205                 "Could not branch to SRAM: %d.\n", ret);
0206             goto end;
0207         }
0208     }
0209 
0210     ret = vnt_vt3184_init(priv);
0211     if (ret) {
0212         dev_dbg(&priv->usb->dev, "vnt_vt3184_init fail\n");
0213         goto end;
0214     }
0215 
0216     init_cmd->init_class = DEVICE_INIT_COLD;
0217     init_cmd->exist_sw_net_addr = priv->exist_sw_net_addr;
0218     for (ii = 0; ii < ARRAY_SIZE(init_cmd->sw_net_addr); ii++)
0219         init_cmd->sw_net_addr[ii] = priv->current_net_addr[ii];
0220     init_cmd->short_retry_limit = priv->hw->wiphy->retry_short;
0221     init_cmd->long_retry_limit = priv->hw->wiphy->retry_long;
0222 
0223     /* issue card_init command to device */
0224     ret = vnt_control_out(priv, MESSAGE_TYPE_CARDINIT, 0, 0,
0225                   sizeof(struct vnt_cmd_card_init),
0226                   (u8 *)init_cmd);
0227     if (ret) {
0228         dev_dbg(&priv->usb->dev, "Issue Card init fail\n");
0229         goto end;
0230     }
0231 
0232     ret = vnt_control_in(priv, MESSAGE_TYPE_INIT_RSP, 0, 0,
0233                  sizeof(struct vnt_rsp_card_init),
0234                  (u8 *)init_rsp);
0235     if (ret) {
0236         dev_dbg(&priv->usb->dev, "Cardinit request in status fail!\n");
0237         goto end;
0238     }
0239 
0240     /* local ID for AES functions */
0241     ret = vnt_control_in(priv, MESSAGE_TYPE_READ, MAC_REG_LOCALID,
0242                  MESSAGE_REQUEST_MACREG, 1, &priv->local_id);
0243     if (ret)
0244         goto end;
0245 
0246     /* do MACbSoftwareReset in MACvInitialize */
0247 
0248     priv->top_ofdm_basic_rate = RATE_24M;
0249     priv->top_cck_basic_rate = RATE_1M;
0250 
0251     /* target to IF pin while programming to RF chip */
0252     priv->power = 0xFF;
0253 
0254     priv->cck_pwr = priv->eeprom[EEP_OFS_PWR_CCK];
0255     priv->ofdm_pwr_g = priv->eeprom[EEP_OFS_PWR_OFDMG];
0256     /* load power table */
0257     for (ii = 0; ii < ARRAY_SIZE(priv->cck_pwr_tbl); ii++) {
0258         priv->cck_pwr_tbl[ii] =
0259             priv->eeprom[ii + EEP_OFS_CCK_PWR_TBL];
0260         if (priv->cck_pwr_tbl[ii] == 0)
0261             priv->cck_pwr_tbl[ii] = priv->cck_pwr;
0262 
0263         priv->ofdm_pwr_tbl[ii] =
0264                 priv->eeprom[ii + EEP_OFS_OFDM_PWR_TBL];
0265         if (priv->ofdm_pwr_tbl[ii] == 0)
0266             priv->ofdm_pwr_tbl[ii] = priv->ofdm_pwr_g;
0267     }
0268 
0269     /*
0270      * original zonetype is USA, but custom zonetype is Europe,
0271      * then need to recover 12, 13, 14 channels with 11 channel
0272      */
0273     for (ii = 11; ii < ARRAY_SIZE(priv->cck_pwr_tbl); ii++) {
0274         priv->cck_pwr_tbl[ii] = priv->cck_pwr_tbl[10];
0275         priv->ofdm_pwr_tbl[ii] = priv->ofdm_pwr_tbl[10];
0276     }
0277 
0278     priv->ofdm_pwr_a = 0x34; /* same as RFbMA2829SelectChannel */
0279 
0280     /* load OFDM A power table */
0281     for (ii = 0; ii < CB_MAX_CHANNEL_5G; ii++) {
0282         priv->ofdm_a_pwr_tbl[ii] =
0283             priv->eeprom[ii + EEP_OFS_OFDMA_PWR_TBL];
0284 
0285         if (priv->ofdm_a_pwr_tbl[ii] == 0)
0286             priv->ofdm_a_pwr_tbl[ii] = priv->ofdm_pwr_a;
0287     }
0288 
0289     antenna = priv->eeprom[EEP_OFS_ANTENNA];
0290 
0291     if (antenna & EEP_ANTINV)
0292         priv->tx_rx_ant_inv = true;
0293     else
0294         priv->tx_rx_ant_inv = false;
0295 
0296     antenna &= (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
0297 
0298     if (antenna == 0) /* if not set default is both */
0299         antenna = (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN);
0300 
0301     if (antenna == (EEP_ANTENNA_AUX | EEP_ANTENNA_MAIN)) {
0302         priv->tx_antenna_mode = ANT_B;
0303         priv->rx_antenna_sel = 1;
0304 
0305         if (priv->tx_rx_ant_inv)
0306             priv->rx_antenna_mode = ANT_A;
0307         else
0308             priv->rx_antenna_mode = ANT_B;
0309     } else  {
0310         priv->rx_antenna_sel = 0;
0311 
0312         if (antenna & EEP_ANTENNA_AUX) {
0313             priv->tx_antenna_mode = ANT_A;
0314 
0315             if (priv->tx_rx_ant_inv)
0316                 priv->rx_antenna_mode = ANT_B;
0317             else
0318                 priv->rx_antenna_mode = ANT_A;
0319         } else {
0320             priv->tx_antenna_mode = ANT_B;
0321 
0322             if (priv->tx_rx_ant_inv)
0323                 priv->rx_antenna_mode = ANT_A;
0324             else
0325                 priv->rx_antenna_mode = ANT_B;
0326         }
0327     }
0328 
0329     /* Set initial antenna mode */
0330     ret = vnt_set_antenna_mode(priv, priv->rx_antenna_mode);
0331     if (ret)
0332         goto end;
0333 
0334     /* default Auto Mode */
0335     priv->bb_type = BB_TYPE_11G;
0336 
0337     /* get RFType */
0338     priv->rf_type = init_rsp->rf_type;
0339 
0340     /* load vt3266 calibration parameters in EEPROM */
0341     if (priv->rf_type == RF_VT3226D0) {
0342         if ((priv->eeprom[EEP_OFS_MAJOR_VER] == 0x1) &&
0343             (priv->eeprom[EEP_OFS_MINOR_VER] >= 0x4)) {
0344             calib_tx_iq = priv->eeprom[EEP_OFS_CALIB_TX_IQ];
0345             calib_tx_dc = priv->eeprom[EEP_OFS_CALIB_TX_DC];
0346             calib_rx_iq = priv->eeprom[EEP_OFS_CALIB_RX_IQ];
0347             if (calib_tx_iq || calib_tx_dc || calib_rx_iq) {
0348                 /* CR255, enable TX/RX IQ and
0349                  * DC compensation mode
0350                  */
0351                 ret = vnt_control_out_u8(priv,
0352                              MESSAGE_REQUEST_BBREG,
0353                              0xff, 0x03);
0354                 if (ret)
0355                     goto end;
0356 
0357                 /* CR251, TX I/Q Imbalance Calibration */
0358                 ret = vnt_control_out_u8(priv,
0359                              MESSAGE_REQUEST_BBREG,
0360                              0xfb, calib_tx_iq);
0361                 if (ret)
0362                     goto end;
0363 
0364                 /* CR252, TX DC-Offset Calibration */
0365                 ret = vnt_control_out_u8(priv,
0366                              MESSAGE_REQUEST_BBREG,
0367                              0xfC, calib_tx_dc);
0368                 if (ret)
0369                     goto end;
0370 
0371                 /* CR253, RX I/Q Imbalance Calibration */
0372                 ret = vnt_control_out_u8(priv,
0373                              MESSAGE_REQUEST_BBREG,
0374                              0xfd, calib_rx_iq);
0375                 if (ret)
0376                     goto end;
0377             } else {
0378                 /* CR255, turn off
0379                  * BB Calibration compensation
0380                  */
0381                 ret = vnt_control_out_u8(priv,
0382                              MESSAGE_REQUEST_BBREG,
0383                              0xff, 0x0);
0384                 if (ret)
0385                     goto end;
0386             }
0387         }
0388     }
0389 
0390     /* get permanent network address */
0391     memcpy(priv->permanent_net_addr, init_rsp->net_addr, 6);
0392     ether_addr_copy(priv->current_net_addr, priv->permanent_net_addr);
0393 
0394     /* if exist SW network address, use it */
0395     dev_dbg(&priv->usb->dev, "Network address = %pM\n",
0396         priv->current_net_addr);
0397 
0398     priv->radio_ctl = priv->eeprom[EEP_OFS_RADIOCTL];
0399 
0400     if ((priv->radio_ctl & EEP_RADIOCTL_ENABLE) != 0) {
0401         ret = vnt_control_in(priv, MESSAGE_TYPE_READ,
0402                      MAC_REG_GPIOCTL1, MESSAGE_REQUEST_MACREG,
0403                      1, &tmp);
0404         if (ret)
0405             goto end;
0406 
0407         if ((tmp & GPIO3_DATA) == 0) {
0408             ret = vnt_mac_reg_bits_on(priv, MAC_REG_GPIOCTL1,
0409                           GPIO3_INTMD);
0410         } else {
0411             ret = vnt_mac_reg_bits_off(priv, MAC_REG_GPIOCTL1,
0412                            GPIO3_INTMD);
0413         }
0414 
0415         if (ret)
0416             goto end;
0417     }
0418 
0419     ret = vnt_mac_set_led(priv, LEDSTS_TMLEN, 0x38);
0420     if (ret)
0421         goto end;
0422 
0423     ret = vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_SLOW);
0424     if (ret)
0425         goto end;
0426 
0427     ret = vnt_mac_reg_bits_on(priv, MAC_REG_GPIOCTL0, BIT(0));
0428     if (ret)
0429         goto end;
0430 
0431     ret = vnt_radio_power_on(priv);
0432     if (ret)
0433         goto end;
0434 
0435     dev_dbg(&priv->usb->dev, "<----INIbInitAdapter Exit\n");
0436 
0437 end:
0438     return ret;
0439 }
0440 
0441 static void vnt_free_tx_bufs(struct vnt_private *priv)
0442 {
0443     struct vnt_usb_send_context *tx_context;
0444     int ii;
0445 
0446     usb_kill_anchored_urbs(&priv->tx_submitted);
0447 
0448     for (ii = 0; ii < priv->num_tx_context; ii++) {
0449         tx_context = priv->tx_context[ii];
0450         if (!tx_context)
0451             continue;
0452 
0453         kfree(tx_context);
0454     }
0455 }
0456 
0457 static void vnt_free_rx_bufs(struct vnt_private *priv)
0458 {
0459     struct vnt_rcb *rcb;
0460     int ii;
0461 
0462     for (ii = 0; ii < priv->num_rcb; ii++) {
0463         rcb = priv->rcb[ii];
0464         if (!rcb)
0465             continue;
0466 
0467         /* deallocate URBs */
0468         if (rcb->urb) {
0469             usb_kill_urb(rcb->urb);
0470             usb_free_urb(rcb->urb);
0471         }
0472 
0473         /* deallocate skb */
0474         if (rcb->skb)
0475             dev_kfree_skb(rcb->skb);
0476 
0477         kfree(rcb);
0478     }
0479 }
0480 
0481 static void vnt_free_int_bufs(struct vnt_private *priv)
0482 {
0483     kfree(priv->int_buf.data_buf);
0484 }
0485 
0486 static int vnt_alloc_bufs(struct vnt_private *priv)
0487 {
0488     int ret;
0489     struct vnt_usb_send_context *tx_context;
0490     struct vnt_rcb *rcb;
0491     int ii;
0492 
0493     init_usb_anchor(&priv->tx_submitted);
0494 
0495     for (ii = 0; ii < priv->num_tx_context; ii++) {
0496         tx_context = kmalloc(sizeof(*tx_context), GFP_KERNEL);
0497         if (!tx_context) {
0498             ret = -ENOMEM;
0499             goto free_tx;
0500         }
0501 
0502         priv->tx_context[ii] = tx_context;
0503         tx_context->priv = priv;
0504         tx_context->pkt_no = ii;
0505         tx_context->in_use = false;
0506     }
0507 
0508     for (ii = 0; ii < priv->num_rcb; ii++) {
0509         priv->rcb[ii] = kzalloc(sizeof(*priv->rcb[ii]), GFP_KERNEL);
0510         if (!priv->rcb[ii]) {
0511             ret = -ENOMEM;
0512             goto free_rx_tx;
0513         }
0514 
0515         rcb = priv->rcb[ii];
0516 
0517         rcb->priv = priv;
0518 
0519         /* allocate URBs */
0520         rcb->urb = usb_alloc_urb(0, GFP_KERNEL);
0521         if (!rcb->urb) {
0522             ret = -ENOMEM;
0523             goto free_rx_tx;
0524         }
0525 
0526         rcb->skb = dev_alloc_skb(priv->rx_buf_sz);
0527         if (!rcb->skb) {
0528             ret = -ENOMEM;
0529             goto free_rx_tx;
0530         }
0531         /* submit rx urb */
0532         ret = vnt_submit_rx_urb(priv, rcb);
0533         if (ret)
0534             goto free_rx_tx;
0535     }
0536 
0537     priv->interrupt_urb = usb_alloc_urb(0, GFP_KERNEL);
0538     if (!priv->interrupt_urb) {
0539         ret = -ENOMEM;
0540         goto free_rx_tx;
0541     }
0542 
0543     priv->int_buf.data_buf = kmalloc(MAX_INTERRUPT_SIZE, GFP_KERNEL);
0544     if (!priv->int_buf.data_buf) {
0545         ret = -ENOMEM;
0546         goto free_rx_tx_urb;
0547     }
0548 
0549     return 0;
0550 
0551 free_rx_tx_urb:
0552     usb_free_urb(priv->interrupt_urb);
0553 free_rx_tx:
0554     vnt_free_rx_bufs(priv);
0555 free_tx:
0556     vnt_free_tx_bufs(priv);
0557     return ret;
0558 }
0559 
0560 static void vnt_tx_80211(struct ieee80211_hw *hw,
0561              struct ieee80211_tx_control *control,
0562              struct sk_buff *skb)
0563 {
0564     struct vnt_private *priv = hw->priv;
0565 
0566     if (vnt_tx_packet(priv, skb))
0567         ieee80211_free_txskb(hw, skb);
0568 }
0569 
0570 static int vnt_start(struct ieee80211_hw *hw)
0571 {
0572     int ret;
0573     struct vnt_private *priv = hw->priv;
0574 
0575     priv->rx_buf_sz = MAX_TOTAL_SIZE_WITH_ALL_HEADERS;
0576 
0577     ret = vnt_alloc_bufs(priv);
0578     if (ret) {
0579         dev_dbg(&priv->usb->dev, "vnt_alloc_bufs fail...\n");
0580         goto err;
0581     }
0582 
0583     clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
0584 
0585     ret = vnt_init_registers(priv);
0586     if (ret) {
0587         dev_dbg(&priv->usb->dev, " init register fail\n");
0588         goto free_all;
0589     }
0590 
0591     ret = vnt_key_init_table(priv);
0592     if (ret)
0593         goto free_all;
0594 
0595     priv->int_interval = 1;  /* bInterval is set to 1 */
0596 
0597     ret = vnt_start_interrupt_urb(priv);
0598     if (ret)
0599         goto free_all;
0600 
0601     ieee80211_wake_queues(hw);
0602 
0603     return 0;
0604 
0605 free_all:
0606     vnt_free_rx_bufs(priv);
0607     vnt_free_tx_bufs(priv);
0608     vnt_free_int_bufs(priv);
0609 
0610     usb_kill_urb(priv->interrupt_urb);
0611     usb_free_urb(priv->interrupt_urb);
0612 err:
0613     return ret;
0614 }
0615 
0616 static void vnt_stop(struct ieee80211_hw *hw)
0617 {
0618     struct vnt_private *priv = hw->priv;
0619     int i;
0620 
0621     if (!priv)
0622         return;
0623 
0624     for (i = 0; i < MAX_KEY_TABLE; i++)
0625         vnt_mac_disable_keyentry(priv, i);
0626 
0627     /* clear all keys */
0628     priv->key_entry_inuse = 0;
0629 
0630     if (!test_bit(DEVICE_FLAGS_UNPLUG, &priv->flags))
0631         vnt_mac_shutdown(priv);
0632 
0633     ieee80211_stop_queues(hw);
0634 
0635     set_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
0636 
0637     cancel_delayed_work_sync(&priv->run_command_work);
0638 
0639     priv->cmd_running = false;
0640 
0641     vnt_free_tx_bufs(priv);
0642     vnt_free_rx_bufs(priv);
0643     vnt_free_int_bufs(priv);
0644 
0645     usb_kill_urb(priv->interrupt_urb);
0646     usb_free_urb(priv->interrupt_urb);
0647 }
0648 
0649 static int vnt_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
0650 {
0651     struct vnt_private *priv = hw->priv;
0652 
0653     priv->vif = vif;
0654 
0655     switch (vif->type) {
0656     case NL80211_IFTYPE_STATION:
0657         break;
0658     case NL80211_IFTYPE_ADHOC:
0659         vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
0660 
0661         vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
0662 
0663         break;
0664     case NL80211_IFTYPE_AP:
0665         vnt_mac_reg_bits_off(priv, MAC_REG_RCR, RCR_UNICAST);
0666 
0667         vnt_mac_reg_bits_on(priv, MAC_REG_HOSTCR, HOSTCR_AP);
0668 
0669         break;
0670     default:
0671         return -EOPNOTSUPP;
0672     }
0673 
0674     priv->op_mode = vif->type;
0675 
0676     /* LED blink on TX */
0677     vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_INTER);
0678 
0679     return 0;
0680 }
0681 
0682 static void vnt_remove_interface(struct ieee80211_hw *hw,
0683                  struct ieee80211_vif *vif)
0684 {
0685     struct vnt_private *priv = hw->priv;
0686 
0687     switch (vif->type) {
0688     case NL80211_IFTYPE_STATION:
0689         break;
0690     case NL80211_IFTYPE_ADHOC:
0691         vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
0692         vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
0693         vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_ADHOC);
0694         break;
0695     case NL80211_IFTYPE_AP:
0696         vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
0697         vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
0698         vnt_mac_reg_bits_off(priv, MAC_REG_HOSTCR, HOSTCR_AP);
0699         break;
0700     default:
0701         break;
0702     }
0703 
0704     vnt_radio_power_off(priv);
0705 
0706     priv->op_mode = NL80211_IFTYPE_UNSPECIFIED;
0707 
0708     /* LED slow blink */
0709     vnt_mac_set_led(priv, LEDSTS_STS, LEDSTS_SLOW);
0710 }
0711 
0712 static int vnt_config(struct ieee80211_hw *hw, u32 changed)
0713 {
0714     struct vnt_private *priv = hw->priv;
0715     struct ieee80211_conf *conf = &hw->conf;
0716 
0717     if (changed & IEEE80211_CONF_CHANGE_PS) {
0718         if (conf->flags & IEEE80211_CONF_PS)
0719             vnt_enable_power_saving(priv, conf->listen_interval);
0720         else
0721             vnt_disable_power_saving(priv);
0722     }
0723 
0724     if ((changed & IEEE80211_CONF_CHANGE_CHANNEL) ||
0725         (conf->flags & IEEE80211_CONF_OFFCHANNEL)) {
0726         vnt_set_channel(priv, conf->chandef.chan->hw_value);
0727 
0728         if (conf->chandef.chan->band == NL80211_BAND_5GHZ)
0729             priv->bb_type = BB_TYPE_11A;
0730         else
0731             priv->bb_type = BB_TYPE_11G;
0732     }
0733 
0734     if (changed & IEEE80211_CONF_CHANGE_POWER)
0735         vnt_rf_setpower(priv, conf->chandef.chan);
0736 
0737     if (conf->flags & (IEEE80211_CONF_OFFCHANNEL | IEEE80211_CONF_IDLE))
0738         /* Set max sensitivity*/
0739         vnt_update_pre_ed_threshold(priv, true);
0740     else
0741         vnt_update_pre_ed_threshold(priv, false);
0742 
0743     return 0;
0744 }
0745 
0746 static void vnt_bss_info_changed(struct ieee80211_hw *hw,
0747                  struct ieee80211_vif *vif,
0748                  struct ieee80211_bss_conf *conf, u64 changed)
0749 {
0750     struct vnt_private *priv = hw->priv;
0751 
0752     priv->current_aid = vif->cfg.aid;
0753 
0754     if (changed & BSS_CHANGED_BSSID && conf->bssid)
0755         vnt_mac_set_bssid_addr(priv, (u8 *)conf->bssid);
0756 
0757     if (changed & BSS_CHANGED_BASIC_RATES) {
0758         priv->basic_rates = conf->basic_rates;
0759 
0760         vnt_update_top_rates(priv);
0761 
0762         dev_dbg(&priv->usb->dev, "basic rates %x\n", conf->basic_rates);
0763     }
0764 
0765     if (changed & BSS_CHANGED_ERP_PREAMBLE) {
0766         if (conf->use_short_preamble) {
0767             vnt_mac_enable_barker_preamble_mode(priv);
0768             priv->preamble_type = PREAMBLE_SHORT;
0769         } else {
0770             vnt_mac_disable_barker_preamble_mode(priv);
0771             priv->preamble_type = PREAMBLE_LONG;
0772         }
0773     }
0774 
0775     if (changed & BSS_CHANGED_ERP_CTS_PROT) {
0776         if (conf->use_cts_prot)
0777             vnt_mac_enable_protect_mode(priv);
0778         else
0779             vnt_mac_disable_protect_mode(priv);
0780     }
0781 
0782     if (changed & BSS_CHANGED_ERP_SLOT) {
0783         if (conf->use_short_slot)
0784             priv->short_slot_time = true;
0785         else
0786             priv->short_slot_time = false;
0787 
0788         vnt_set_short_slot_time(priv);
0789         vnt_set_vga_gain_offset(priv, priv->bb_vga[0]);
0790     }
0791 
0792     if (changed & (BSS_CHANGED_BASIC_RATES | BSS_CHANGED_ERP_PREAMBLE |
0793                BSS_CHANGED_ERP_SLOT))
0794         vnt_set_bss_mode(priv);
0795 
0796     if (changed & (BSS_CHANGED_TXPOWER | BSS_CHANGED_BANDWIDTH))
0797         vnt_rf_setpower(priv, conf->chandef.chan);
0798 
0799     if (changed & BSS_CHANGED_BEACON_ENABLED) {
0800         dev_dbg(&priv->usb->dev,
0801             "Beacon enable %d\n", conf->enable_beacon);
0802 
0803         if (conf->enable_beacon) {
0804             vnt_beacon_enable(priv, vif, conf);
0805 
0806             vnt_mac_reg_bits_on(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
0807         } else {
0808             vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX);
0809         }
0810     }
0811 
0812     if (changed & (BSS_CHANGED_ASSOC | BSS_CHANGED_BEACON_INFO) &&
0813         priv->op_mode != NL80211_IFTYPE_AP) {
0814         if (vif->cfg.assoc && conf->beacon_rate) {
0815             u16 ps_beacon_int = conf->beacon_int;
0816 
0817             if (conf->dtim_period)
0818                 ps_beacon_int *= conf->dtim_period;
0819             else if (hw->conf.listen_interval)
0820                 ps_beacon_int *= hw->conf.listen_interval;
0821 
0822             vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL,
0823                         TFTCTL_TSFCNTREN);
0824 
0825             vnt_mac_set_beacon_interval(priv, ps_beacon_int);
0826 
0827             vnt_reset_next_tbtt(priv, conf->beacon_int);
0828 
0829             vnt_adjust_tsf(priv, conf->beacon_rate->hw_value,
0830                        conf->sync_tsf, priv->current_tsf);
0831 
0832             vnt_update_next_tbtt(priv,
0833                          conf->sync_tsf, ps_beacon_int);
0834         } else {
0835             vnt_clear_current_tsf(priv);
0836 
0837             vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL,
0838                          TFTCTL_TSFCNTREN);
0839         }
0840     }
0841 }
0842 
0843 static u64 vnt_prepare_multicast(struct ieee80211_hw *hw,
0844                  struct netdev_hw_addr_list *mc_list)
0845 {
0846     struct vnt_private *priv = hw->priv;
0847     struct netdev_hw_addr *ha;
0848     u64 mc_filter = 0;
0849     u32 bit_nr;
0850 
0851     netdev_hw_addr_list_for_each(ha, mc_list) {
0852         bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
0853         mc_filter |= BIT_ULL(bit_nr);
0854     }
0855 
0856     priv->mc_list_count = mc_list->count;
0857 
0858     return mc_filter;
0859 }
0860 
0861 static void vnt_configure(struct ieee80211_hw *hw,
0862               unsigned int changed_flags,
0863               unsigned int *total_flags, u64 multicast)
0864 {
0865     struct vnt_private *priv = hw->priv;
0866     u8 rx_mode = 0;
0867 
0868     *total_flags &= FIF_ALLMULTI | FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC;
0869 
0870     vnt_control_in(priv, MESSAGE_TYPE_READ, MAC_REG_RCR,
0871                MESSAGE_REQUEST_MACREG, sizeof(u8), &rx_mode);
0872 
0873     dev_dbg(&priv->usb->dev, "rx mode in = %x\n", rx_mode);
0874 
0875     if (changed_flags & FIF_ALLMULTI) {
0876         if (*total_flags & FIF_ALLMULTI) {
0877             if (priv->mc_list_count > 2)
0878                 vnt_mac_set_filter(priv, ~0);
0879             else
0880                 vnt_mac_set_filter(priv, multicast);
0881 
0882             rx_mode |= RCR_MULTICAST | RCR_BROADCAST;
0883         } else {
0884             rx_mode &= ~(RCR_MULTICAST | RCR_BROADCAST);
0885         }
0886     }
0887 
0888     if (changed_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC)) {
0889         if (*total_flags & (FIF_OTHER_BSS | FIF_BCN_PRBRESP_PROMISC))
0890             rx_mode &= ~RCR_BSSID;
0891         else
0892             rx_mode |= RCR_BSSID;
0893     }
0894 
0895     vnt_control_out_u8(priv, MESSAGE_REQUEST_MACREG, MAC_REG_RCR, rx_mode);
0896 
0897     dev_dbg(&priv->usb->dev, "rx mode out= %x\n", rx_mode);
0898 }
0899 
0900 static int vnt_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
0901                struct ieee80211_vif *vif, struct ieee80211_sta *sta,
0902                struct ieee80211_key_conf *key)
0903 {
0904     struct vnt_private *priv = hw->priv;
0905 
0906     switch (cmd) {
0907     case SET_KEY:
0908         return vnt_set_keys(hw, sta, vif, key);
0909     case DISABLE_KEY:
0910         if (test_bit(key->hw_key_idx, &priv->key_entry_inuse)) {
0911             clear_bit(key->hw_key_idx, &priv->key_entry_inuse);
0912 
0913             vnt_mac_disable_keyentry(priv, key->hw_key_idx);
0914         }
0915         break;
0916 
0917     default:
0918         break;
0919     }
0920 
0921     return 0;
0922 }
0923 
0924 static int vnt_get_stats(struct ieee80211_hw *hw,
0925              struct ieee80211_low_level_stats *stats)
0926 {
0927     struct vnt_private *priv = hw->priv;
0928 
0929     memcpy(stats, &priv->low_stats, sizeof(*stats));
0930 
0931     return 0;
0932 }
0933 
0934 static u64 vnt_get_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
0935 {
0936     struct vnt_private *priv = hw->priv;
0937 
0938     return priv->current_tsf;
0939 }
0940 
0941 static void vnt_set_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
0942             u64 tsf)
0943 {
0944     struct vnt_private *priv = hw->priv;
0945 
0946     vnt_update_next_tbtt(priv, tsf, vif->bss_conf.beacon_int);
0947 }
0948 
0949 static void vnt_reset_tsf(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
0950 {
0951     struct vnt_private *priv = hw->priv;
0952 
0953     vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN);
0954 
0955     vnt_clear_current_tsf(priv);
0956 }
0957 
0958 static const struct ieee80211_ops vnt_mac_ops = {
0959     .tx         = vnt_tx_80211,
0960     .start          = vnt_start,
0961     .stop           = vnt_stop,
0962     .add_interface      = vnt_add_interface,
0963     .remove_interface   = vnt_remove_interface,
0964     .config         = vnt_config,
0965     .bss_info_changed   = vnt_bss_info_changed,
0966     .prepare_multicast  = vnt_prepare_multicast,
0967     .configure_filter   = vnt_configure,
0968     .set_key        = vnt_set_key,
0969     .get_stats      = vnt_get_stats,
0970     .get_tsf        = vnt_get_tsf,
0971     .set_tsf        = vnt_set_tsf,
0972     .reset_tsf      = vnt_reset_tsf,
0973 };
0974 
0975 int vnt_init(struct vnt_private *priv)
0976 {
0977     if (vnt_init_registers(priv))
0978         return -EAGAIN;
0979 
0980     SET_IEEE80211_PERM_ADDR(priv->hw, priv->permanent_net_addr);
0981 
0982     vnt_init_bands(priv);
0983 
0984     if (ieee80211_register_hw(priv->hw))
0985         return -ENODEV;
0986 
0987     priv->mac_hw = true;
0988 
0989     vnt_radio_power_off(priv);
0990 
0991     return 0;
0992 }
0993 
0994 static int
0995 vt6656_probe(struct usb_interface *intf, const struct usb_device_id *id)
0996 {
0997     struct usb_device *udev;
0998     struct vnt_private *priv;
0999     struct ieee80211_hw *hw;
1000     struct wiphy *wiphy;
1001     int rc;
1002 
1003     udev = usb_get_dev(interface_to_usbdev(intf));
1004 
1005     dev_notice(&udev->dev, "%s Ver. %s\n",
1006            DEVICE_FULL_DRV_NAM, DEVICE_VERSION);
1007     dev_notice(&udev->dev,
1008            "Copyright (c) 2004 VIA Networking Technologies, Inc.\n");
1009 
1010     hw = ieee80211_alloc_hw(sizeof(struct vnt_private), &vnt_mac_ops);
1011     if (!hw) {
1012         dev_err(&udev->dev, "could not register ieee80211_hw\n");
1013         rc = -ENOMEM;
1014         goto err_nomem;
1015     }
1016 
1017     priv = hw->priv;
1018     priv->hw = hw;
1019     priv->usb = udev;
1020     priv->intf = intf;
1021 
1022     vnt_set_options(priv);
1023 
1024     spin_lock_init(&priv->lock);
1025     mutex_init(&priv->usb_lock);
1026 
1027     INIT_DELAYED_WORK(&priv->run_command_work, vnt_run_command);
1028 
1029     usb_set_intfdata(intf, priv);
1030 
1031     wiphy = priv->hw->wiphy;
1032 
1033     wiphy->frag_threshold = FRAG_THRESH_DEF;
1034     wiphy->rts_threshold = RTS_THRESH_DEF;
1035     wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1036         BIT(NL80211_IFTYPE_ADHOC) | BIT(NL80211_IFTYPE_AP);
1037 
1038     ieee80211_hw_set(priv->hw, TIMING_BEACON_ONLY);
1039     ieee80211_hw_set(priv->hw, SIGNAL_DBM);
1040     ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
1041     ieee80211_hw_set(priv->hw, REPORTS_TX_ACK_STATUS);
1042     ieee80211_hw_set(priv->hw, SUPPORTS_PS);
1043     ieee80211_hw_set(priv->hw, PS_NULLFUNC_STACK);
1044 
1045     priv->hw->extra_tx_headroom =
1046         sizeof(struct vnt_tx_buffer) + sizeof(struct vnt_tx_usb_header);
1047     priv->hw->max_signal = 100;
1048 
1049     SET_IEEE80211_DEV(priv->hw, &intf->dev);
1050 
1051     rc = usb_reset_device(priv->usb);
1052     if (rc)
1053         dev_warn(&priv->usb->dev,
1054              "%s reset fail status=%d\n", __func__, rc);
1055 
1056     clear_bit(DEVICE_FLAGS_DISCONNECTED, &priv->flags);
1057     vnt_reset_command_timer(priv);
1058 
1059     vnt_schedule_command(priv, WLAN_CMD_INIT_MAC80211);
1060 
1061     return 0;
1062 
1063 err_nomem:
1064     usb_put_dev(udev);
1065 
1066     return rc;
1067 }
1068 
1069 static void vt6656_disconnect(struct usb_interface *intf)
1070 {
1071     struct vnt_private *priv = usb_get_intfdata(intf);
1072 
1073     if (!priv)
1074         return;
1075 
1076     if (priv->mac_hw)
1077         ieee80211_unregister_hw(priv->hw);
1078 
1079     usb_set_intfdata(intf, NULL);
1080     usb_put_dev(interface_to_usbdev(intf));
1081 
1082     set_bit(DEVICE_FLAGS_UNPLUG, &priv->flags);
1083 
1084     ieee80211_free_hw(priv->hw);
1085 }
1086 
1087 #ifdef CONFIG_PM
1088 
1089 static int vt6656_suspend(struct usb_interface *intf, pm_message_t message)
1090 {
1091     return 0;
1092 }
1093 
1094 static int vt6656_resume(struct usb_interface *intf)
1095 {
1096     return 0;
1097 }
1098 
1099 #endif /* CONFIG_PM */
1100 
1101 MODULE_DEVICE_TABLE(usb, vt6656_table);
1102 
1103 static struct usb_driver vt6656_driver = {
1104     .name =     DEVICE_NAME,
1105     .probe =    vt6656_probe,
1106     .disconnect =   vt6656_disconnect,
1107     .id_table = vt6656_table,
1108 #ifdef CONFIG_PM
1109     .suspend = vt6656_suspend,
1110     .resume = vt6656_resume,
1111 #endif /* CONFIG_PM */
1112 };
1113 
1114 module_usb_driver(vt6656_driver);
1115 
1116 MODULE_FIRMWARE(FIRMWARE_NAME);
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