drivers/net/wireless/rtl818x/rtl8187_dev.c

   1 /*
   2  * Linux device driver for RTL8187
   3  *
   4  * Copyright 2007 Michael Wu <flamingice@sourmilk.net>
   5  * Copyright 2007 Andrea Merello <andreamrl@tiscali.it>
   6  *
   7  * Based on the r8187 driver, which is:
   8  * Copyright 2005 Andrea Merello <andreamrl@tiscali.it>, et al.
   9  *
  10  * The driver was extended to the RTL8187B in 2008 by:
  11  *      Herton Ronaldo Krzesinski <herton@mandriva.com.br>
  12  *      Hin-Tak Leung <htl10@users.sourceforge.net>
  13  *      Larry Finger <Larry.Finger@lwfinger.net>
  14  *
  15  * Magic delays and register offsets below are taken from the original
  16  * r8187 driver sources.  Thanks to Realtek for their support!
  17  *
  18  * This program is free software; you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License version 2 as
  20  * published by the Free Software Foundation.
  21  */
  22
  23 #include <linux/init.h>
  24 #include <linux/usb.h>
  25 #include <linux/delay.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/eeprom_93cx6.h>
  28 #include <net/mac80211.h>
  29
  30 #include "rtl8187.h"
  31 #include "rtl8187_rtl8225.h"
  32
  33 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
  34 MODULE_AUTHOR("Andrea Merello <andreamrl@tiscali.it>");
  35 MODULE_AUTHOR("Herton Ronaldo Krzesinski <herton@mandriva.com.br>");
  36 MODULE_AUTHOR("Hin-Tak Leung <htl10@users.sourceforge.net>");
  37 MODULE_AUTHOR("Larry Finger <Larry.Finger@lwfinger.net>");
  38 MODULE_DESCRIPTION("RTL8187/RTL8187B USB wireless driver");
  39 MODULE_LICENSE("GPL");
  40
  41 static struct usb_device_id rtl8187_table[] __devinitdata = {
  42         /* Asus */
  43         {USB_DEVICE(0x0b05, 0x171d), .driver_info = DEVICE_RTL8187},
  44         /* Belkin */
  45         {USB_DEVICE(0x050d, 0x705e), .driver_info = DEVICE_RTL8187B},
  46         /* Realtek */
  47         {USB_DEVICE(0x0bda, 0x8187), .driver_info = DEVICE_RTL8187},
  48         {USB_DEVICE(0x0bda, 0x8189), .driver_info = DEVICE_RTL8187B},
  49         {USB_DEVICE(0x0bda, 0x8197), .driver_info = DEVICE_RTL8187B},
  50         {USB_DEVICE(0x0bda, 0x8198), .driver_info = DEVICE_RTL8187B},
  51         /* Netgear */
  52         {USB_DEVICE(0x0846, 0x6100), .driver_info = DEVICE_RTL8187},
  53         {USB_DEVICE(0x0846, 0x6a00), .driver_info = DEVICE_RTL8187},
  54         {USB_DEVICE(0x0846, 0x4260), .driver_info = DEVICE_RTL8187B},
  55         /* HP */
  56         {USB_DEVICE(0x03f0, 0xca02), .driver_info = DEVICE_RTL8187},
  57         /* Sitecom */
  58         {USB_DEVICE(0x0df6, 0x000d), .driver_info = DEVICE_RTL8187},
  59         {USB_DEVICE(0x0df6, 0x0028), .driver_info = DEVICE_RTL8187B},
  60         /* Abocom */
  61         {USB_DEVICE(0x13d1, 0xabe6), .driver_info = DEVICE_RTL8187},
  62         {}
  63 };
  64
  65 MODULE_DEVICE_TABLE(usb, rtl8187_table);
  66
  67 static const struct ieee80211_rate rtl818x_rates[] = {
  68         { .bitrate = 10, .hw_value = 0, },
  69         { .bitrate = 20, .hw_value = 1, },
  70         { .bitrate = 55, .hw_value = 2, },
  71         { .bitrate = 110, .hw_value = 3, },
  72         { .bitrate = 60, .hw_value = 4, },
  73         { .bitrate = 90, .hw_value = 5, },
  74         { .bitrate = 120, .hw_value = 6, },
  75         { .bitrate = 180, .hw_value = 7, },
  76         { .bitrate = 240, .hw_value = 8, },
  77         { .bitrate = 360, .hw_value = 9, },
  78         { .bitrate = 480, .hw_value = 10, },
  79         { .bitrate = 540, .hw_value = 11, },
  80 };
  81
  82 static const struct ieee80211_channel rtl818x_channels[] = {
  83         { .center_freq = 2412 },
  84         { .center_freq = 2417 },
  85         { .center_freq = 2422 },
  86         { .center_freq = 2427 },
  87         { .center_freq = 2432 },
  88         { .center_freq = 2437 },
  89         { .center_freq = 2442 },
  90         { .center_freq = 2447 },
  91         { .center_freq = 2452 },
  92         { .center_freq = 2457 },
  93         { .center_freq = 2462 },
  94         { .center_freq = 2467 },
  95         { .center_freq = 2472 },
  96         { .center_freq = 2484 },
  97 };
  98
  99 static void rtl8187_iowrite_async_cb(struct urb *urb)
 100 {
 101         kfree(urb->context);
 102 }
 103
 104 static void rtl8187_iowrite_async(struct rtl8187_priv *priv, __le16 addr,
 105                                   void *data, u16 len)
 106 {
 107         struct usb_ctrlrequest *dr;
 108         struct urb *urb;
 109         struct rtl8187_async_write_data {
 110                 u8 data[4];
 111                 struct usb_ctrlrequest dr;
 112         } *buf;
 113         int rc;
 114
 115         buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
 116         if (!buf)
 117                 return;
 118
 119         urb = usb_alloc_urb(0, GFP_ATOMIC);
 120         if (!urb) {
 121                 kfree(buf);
 122                 return;
 123         }
 124
 125         dr = &buf->dr;
 126
 127         dr->bRequestType = RTL8187_REQT_WRITE;
 128         dr->bRequest = RTL8187_REQ_SET_REG;
 129         dr->wValue = addr;
 130         dr->wIndex = 0;
 131         dr->wLength = cpu_to_le16(len);
 132
 133         memcpy(buf, data, len);
 134
 135         usb_fill_control_urb(urb, priv->udev, usb_sndctrlpipe(priv->udev, 0),
 136                              (unsigned char *)dr, buf, len,
 137                              rtl8187_iowrite_async_cb, buf);
 138         usb_anchor_urb(urb, &priv->anchored);
 139         rc = usb_submit_urb(urb, GFP_ATOMIC);
 140         if (rc < 0) {
 141                 kfree(buf);
 142                 usb_unanchor_urb(urb);
 143         }
 144         usb_free_urb(urb);
 145 }
 146
 147 static inline void rtl818x_iowrite32_async(struct rtl8187_priv *priv,
 148                                            __le32 *addr, u32 val)
 149 {
 150         __le32 buf = cpu_to_le32(val);
 151
 152         rtl8187_iowrite_async(priv, cpu_to_le16((unsigned long)addr),
 153                               &buf, sizeof(buf));
 154 }
 155
 156 void rtl8187_write_phy(struct ieee80211_hw *dev, u8 addr, u32 data)
 157 {
 158         struct rtl8187_priv *priv = dev->priv;
 159
 160         data <<= 8;
 161         data |= addr | 0x80;
 162
 163         rtl818x_iowrite8(priv, &priv->map->PHY[3], (data >> 24) & 0xFF);
 164         rtl818x_iowrite8(priv, &priv->map->PHY[2], (data >> 16) & 0xFF);
 165         rtl818x_iowrite8(priv, &priv->map->PHY[1], (data >> 8) & 0xFF);
 166         rtl818x_iowrite8(priv, &priv->map->PHY[0], data & 0xFF);
 167 }
 168
 169 static void rtl8187_tx_cb(struct urb *urb)
 170 {
 171         struct sk_buff *skb = (struct sk_buff *)urb->context;
 172         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 173         struct ieee80211_hw *hw = info->rate_driver_data[0];
 174         struct rtl8187_priv *priv = hw->priv;
 175
 176         skb_pull(skb, priv->is_rtl8187b ? sizeof(struct rtl8187b_tx_hdr) :
 177                                           sizeof(struct rtl8187_tx_hdr));
 178         ieee80211_tx_info_clear_status(info);
 179
 180         if (!urb->status &&
 181             !(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
 182             priv->is_rtl8187b) {
 183                 skb_queue_tail(&priv->b_tx_status.queue, skb);
 184
 185                 /* queue is "full", discard last items */
 186                 while (skb_queue_len(&priv->b_tx_status.queue) > 5) {
 187                         struct sk_buff *old_skb;
 188
 189                         dev_dbg(&priv->udev->dev,
 190                                 "transmit status queue full\n");
 191
 192                         old_skb = skb_dequeue(&priv->b_tx_status.queue);
 193                         ieee80211_tx_status_irqsafe(hw, old_skb);
 194                 }
 195         } else {
 196                 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) && !urb->status)
 197                         info->flags |= IEEE80211_TX_STAT_ACK;
 198                 ieee80211_tx_status_irqsafe(hw, skb);
 199         }
 200 }
 201
 202 static int rtl8187_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
 203 {
 204         struct rtl8187_priv *priv = dev->priv;
 205         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 206         unsigned int ep;
 207         void *buf;
 208         struct urb *urb;
 209         __le16 rts_dur = 0;
 210         u32 flags;
 211         int rc;
 212
 213         urb = usb_alloc_urb(0, GFP_ATOMIC);
 214         if (!urb) {
 215                 kfree_skb(skb);
 216                 return -ENOMEM;
 217         }
 218
 219         flags = skb->len;
 220         flags |= RTL818X_TX_DESC_FLAG_NO_ENC;
 221
 222         flags |= ieee80211_get_tx_rate(dev, info)->hw_value << 24;
 223         if (ieee80211_has_morefrags(((struct ieee80211_hdr *)skb->data)->frame_control))
 224                 flags |= RTL818X_TX_DESC_FLAG_MOREFRAG;
 225         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
 226                 flags |= RTL818X_TX_DESC_FLAG_RTS;
 227                 flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
 228                 rts_dur = ieee80211_rts_duration(dev, priv->vif,
 229                                                  skb->len, info);
 230         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
 231                 flags |= RTL818X_TX_DESC_FLAG_CTS;
 232                 flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
 233         }
 234
 235         if (!priv->is_rtl8187b) {
 236                 struct rtl8187_tx_hdr *hdr =
 237                         (struct rtl8187_tx_hdr *)skb_push(skb, sizeof(*hdr));
 238                 hdr->flags = cpu_to_le32(flags);
 239                 hdr->len = 0;
 240                 hdr->rts_duration = rts_dur;
 241                 hdr->retry = cpu_to_le32((info->control.rates[0].count - 1) << 8);
 242                 buf = hdr;
 243
 244                 ep = 2;
 245         } else {
 246                 /* fc needs to be calculated before skb_push() */
 247                 unsigned int epmap[4] = { 6, 7, 5, 4 };
 248                 struct ieee80211_hdr *tx_hdr =
 249                         (struct ieee80211_hdr *)(skb->data);
 250                 u16 fc = le16_to_cpu(tx_hdr->frame_control);
 251
 252                 struct rtl8187b_tx_hdr *hdr =
 253                         (struct rtl8187b_tx_hdr *)skb_push(skb, sizeof(*hdr));
 254                 struct ieee80211_rate *txrate =
 255                         ieee80211_get_tx_rate(dev, info);
 256                 memset(hdr, 0, sizeof(*hdr));
 257                 hdr->flags = cpu_to_le32(flags);
 258                 hdr->rts_duration = rts_dur;
 259                 hdr->retry = cpu_to_le32((info->control.rates[0].count - 1) << 8);
 260                 hdr->tx_duration =
 261                         ieee80211_generic_frame_duration(dev, priv->vif,
 262                                                          skb->len, txrate);
 263                 buf = hdr;
 264
 265                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
 266                         ep = 12;
 267                 else
 268                         ep = epmap[skb_get_queue_mapping(skb)];
 269         }
 270
 271         info->rate_driver_data[0] = dev;
 272         info->rate_driver_data[1] = urb;
 273
 274         usb_fill_bulk_urb(urb, priv->udev, usb_sndbulkpipe(priv->udev, ep),
 275                           buf, skb->len, rtl8187_tx_cb, skb);
 276         usb_anchor_urb(urb, &priv->anchored);
 277         rc = usb_submit_urb(urb, GFP_ATOMIC);
 278         if (rc < 0) {
 279                 usb_unanchor_urb(urb);
 280                 kfree_skb(skb);
 281         }
 282         usb_free_urb(urb);
 283
 284         return rc;
 285 }
 286
 287 static void rtl8187_rx_cb(struct urb *urb)
 288 {
 289         struct sk_buff *skb = (struct sk_buff *)urb->context;
 290         struct rtl8187_rx_info *info = (struct rtl8187_rx_info *)skb->cb;
 291         struct ieee80211_hw *dev = info->dev;
 292         struct rtl8187_priv *priv = dev->priv;
 293         struct ieee80211_rx_status rx_status = { 0 };
 294         int rate, signal;
 295         u32 flags;
 296         u32 quality;
 297         unsigned long f;
 298
 299         spin_lock_irqsave(&priv->rx_queue.lock, f);
 300         if (skb->next)
 301                 __skb_unlink(skb, &priv->rx_queue);
 302         else {
 303                 spin_unlock_irqrestore(&priv->rx_queue.lock, f);
 304                 return;
 305         }
 306         spin_unlock_irqrestore(&priv->rx_queue.lock, f);
 307         skb_put(skb, urb->actual_length);
 308
 309         if (unlikely(urb->status)) {
 310                 dev_kfree_skb_irq(skb);
 311                 return;
 312         }
 313
 314         if (!priv->is_rtl8187b) {
 315                 struct rtl8187_rx_hdr *hdr =
 316                         (typeof(hdr))(skb_tail_pointer(skb) - sizeof(*hdr));
 317                 flags = le32_to_cpu(hdr->flags);
 318                 /* As with the RTL8187B below, the AGC is used to calculate
 319                  * signal strength and quality. In this case, the scaling
 320                  * constants are derived from the output of p54usb.
 321                  */
 322                 quality = 130 - ((41 * hdr->agc) >> 6);
 323                 signal = -4 - ((27 * hdr->agc) >> 6);
 324                 rx_status.antenna = (hdr->signal >> 7) & 1;
 325                 rx_status.mactime = le64_to_cpu(hdr->mac_time);
 326         } else {
 327                 struct rtl8187b_rx_hdr *hdr =
 328                         (typeof(hdr))(skb_tail_pointer(skb) - sizeof(*hdr));
 329                 /* The Realtek datasheet for the RTL8187B shows that the RX
 330                  * header contains the following quantities: signal quality,
 331                  * RSSI, AGC, the received power in dB, and the measured SNR.
 332                  * In testing, none of these quantities show qualitative
 333                  * agreement with AP signal strength, except for the AGC,
 334                  * which is inversely proportional to the strength of the
 335                  * signal. In the following, the quality and signal strength
 336                  * are derived from the AGC. The arbitrary scaling constants
 337                  * are chosen to make the results close to the values obtained
 338                  * for a BCM4312 using b43 as the driver. The noise is ignored
 339                  * for now.
 340                  */
 341                 flags = le32_to_cpu(hdr->flags);
 342                 quality = 170 - hdr->agc;
 343                 signal = 14 - hdr->agc / 2;
 344                 rx_status.antenna = (hdr->rssi >> 7) & 1;
 345                 rx_status.mactime = le64_to_cpu(hdr->mac_time);
 346         }
 347
 348         if (quality > 100)
 349                 quality = 100;
 350         rx_status.qual = quality;
 351         priv->quality = quality;
 352         rx_status.signal = signal;
 353         priv->signal = signal;
 354         rate = (flags >> 20) & 0xF;
 355         skb_trim(skb, flags & 0x0FFF);
 356         rx_status.rate_idx = rate;
 357         rx_status.freq = dev->conf.channel->center_freq;
 358         rx_status.band = dev->conf.channel->band;
 359         rx_status.flag |= RX_FLAG_TSFT;
 360         if (flags & RTL818X_RX_DESC_FLAG_CRC32_ERR)
 361                 rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
 362         ieee80211_rx_irqsafe(dev, skb, &rx_status);
 363
 364         skb = dev_alloc_skb(RTL8187_MAX_RX);
 365         if (unlikely(!skb)) {
 366                 /* TODO check rx queue length and refill *somewhere* */
 367                 return;
 368         }
 369
 370         info = (struct rtl8187_rx_info *)skb->cb;
 371         info->urb = urb;
 372         info->dev = dev;
 373         urb->transfer_buffer = skb_tail_pointer(skb);
 374         urb->context = skb;
 375         skb_queue_tail(&priv->rx_queue, skb);
 376
 377         usb_anchor_urb(urb, &priv->anchored);
 378         if (usb_submit_urb(urb, GFP_ATOMIC)) {
 379                 usb_unanchor_urb(urb);
 380                 skb_unlink(skb, &priv->rx_queue);
 381                 dev_kfree_skb_irq(skb);
 382         }
 383 }
 384
 385 static int rtl8187_init_urbs(struct ieee80211_hw *dev)
 386 {
 387         struct rtl8187_priv *priv = dev->priv;
 388         struct urb *entry = NULL;
 389         struct sk_buff *skb;
 390         struct rtl8187_rx_info *info;
 391         int ret = 0;
 392
 393         while (skb_queue_len(&priv->rx_queue) < 8) {
 394                 skb = __dev_alloc_skb(RTL8187_MAX_RX, GFP_KERNEL);
 395                 if (!skb) {
 396                         ret = -ENOMEM;
 397                         goto err;
 398                 }
 399                 entry = usb_alloc_urb(0, GFP_KERNEL);
 400                 if (!entry) {
 401                         ret = -ENOMEM;
 402                         goto err;
 403                 }
 404                 usb_fill_bulk_urb(entry, priv->udev,
 405                                   usb_rcvbulkpipe(priv->udev,
 406                                   priv->is_rtl8187b ? 3 : 1),
 407                                   skb_tail_pointer(skb),
 408                                   RTL8187_MAX_RX, rtl8187_rx_cb, skb);
 409                 info = (struct rtl8187_rx_info *)skb->cb;
 410                 info->urb = entry;
 411                 info->dev = dev;
 412                 skb_queue_tail(&priv->rx_queue, skb);
 413                 usb_anchor_urb(entry, &priv->anchored);
 414                 ret = usb_submit_urb(entry, GFP_KERNEL);
 415                 if (ret) {
 416                         skb_unlink(skb, &priv->rx_queue);
 417                         usb_unanchor_urb(entry);
 418                         goto err;
 419                 }
 420                 usb_free_urb(entry);
 421         }
 422         return ret;
 423
 424 err:
 425         usb_free_urb(entry);
 426         kfree_skb(skb);
 427         usb_kill_anchored_urbs(&priv->anchored);
 428         return ret;
 429 }
 430
 431 static void rtl8187b_status_cb(struct urb *urb)
 432 {
 433         struct ieee80211_hw *hw = (struct ieee80211_hw *)urb->context;
 434         struct rtl8187_priv *priv = hw->priv;
 435         u64 val;
 436         unsigned int cmd_type;
 437
 438         if (unlikely(urb->status))
 439                 return;
 440
 441         /*
 442          * Read from status buffer:
 443          *
 444          * bits [30:31] = cmd type:
 445          * - 0 indicates tx beacon interrupt
 446          * - 1 indicates tx close descriptor
 447          *
 448          * In the case of tx beacon interrupt:
 449          * [0:9] = Last Beacon CW
 450          * [10:29] = reserved
 451          * [30:31] = 00b
 452          * [32:63] = Last Beacon TSF
 453          *
 454          * If it's tx close descriptor:
 455          * [0:7] = Packet Retry Count
 456          * [8:14] = RTS Retry Count
 457          * [15] = TOK
 458          * [16:27] = Sequence No
 459          * [28] = LS
 460          * [29] = FS
 461          * [30:31] = 01b
 462          * [32:47] = unused (reserved?)
 463          * [48:63] = MAC Used Time
 464          */
 465         val = le64_to_cpu(priv->b_tx_status.buf);
 466
 467         cmd_type = (val >> 30) & 0x3;
 468         if (cmd_type == 1) {
 469                 unsigned int pkt_rc, seq_no;
 470                 bool tok;
 471                 struct sk_buff *skb;
 472                 struct ieee80211_hdr *ieee80211hdr;
 473                 unsigned long flags;
 474
 475                 pkt_rc = val & 0xFF;
 476                 tok = val & (1 << 15);
 477                 seq_no = (val >> 16) & 0xFFF;
 478
 479                 spin_lock_irqsave(&priv->b_tx_status.queue.lock, flags);
 480                 skb_queue_reverse_walk(&priv->b_tx_status.queue, skb) {
 481                         ieee80211hdr = (struct ieee80211_hdr *)skb->data;
 482
 483                         /*
 484                          * While testing, it was discovered that the seq_no
 485                          * doesn't actually contains the sequence number.
 486                          * Instead of returning just the 12 bits of sequence
 487                          * number, hardware is returning entire sequence control
 488                          * (fragment number plus sequence number) in a 12 bit
 489                          * only field overflowing after some time. As a
 490                          * workaround, just consider the lower bits, and expect
 491                          * it's unlikely we wrongly ack some sent data
 492                          */
 493                         if ((le16_to_cpu(ieee80211hdr->seq_ctrl)
 494                             & 0xFFF) == seq_no)
 495                                 break;
 496                 }
 497                 if (skb != (struct sk_buff *) &priv->b_tx_status.queue) {
 498                         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 499
 500                         __skb_unlink(skb, &priv->b_tx_status.queue);
 501                         if (tok)
 502                                 info->flags |= IEEE80211_TX_STAT_ACK;
 503                         info->status.rates[0].count = pkt_rc + 1;
 504
 505                         ieee80211_tx_status_irqsafe(hw, skb);
 506                 }
 507                 spin_unlock_irqrestore(&priv->b_tx_status.queue.lock, flags);
 508         }
 509
 510         usb_anchor_urb(urb, &priv->anchored);
 511         if (usb_submit_urb(urb, GFP_ATOMIC))
 512                 usb_unanchor_urb(urb);
 513 }
 514
 515 static int rtl8187b_init_status_urb(struct ieee80211_hw *dev)
 516 {
 517         struct rtl8187_priv *priv = dev->priv;
 518         struct urb *entry;
 519         int ret = 0;
 520
 521         entry = usb_alloc_urb(0, GFP_KERNEL);
 522         if (!entry)
 523                 return -ENOMEM;
 524
 525         usb_fill_bulk_urb(entry, priv->udev, usb_rcvbulkpipe(priv->udev, 9),
 526                           &priv->b_tx_status.buf, sizeof(priv->b_tx_status.buf),
 527                           rtl8187b_status_cb, dev);
 528
 529         usb_anchor_urb(entry, &priv->anchored);
 530         ret = usb_submit_urb(entry, GFP_KERNEL);
 531         if (ret)
 532                 usb_unanchor_urb(entry);
 533         usb_free_urb(entry);
 534
 535         return ret;
 536 }
 537
 538 static int rtl8187_cmd_reset(struct ieee80211_hw *dev)
 539 {
 540         struct rtl8187_priv *priv = dev->priv;
 541         u8 reg;
 542         int i;
 543
 544         reg = rtl818x_ioread8(priv, &priv->map->CMD);
 545         reg &= (1 << 1);
 546         reg |= RTL818X_CMD_RESET;
 547         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
 548
 549         i = 10;
 550         do {
 551                 msleep(2);
 552                 if (!(rtl818x_ioread8(priv, &priv->map->CMD) &
 553                       RTL818X_CMD_RESET))
 554                         break;
 555         } while (--i);
 556
 557         if (!i) {
 558                 printk(KERN_ERR "%s: Reset timeout!\n", wiphy_name(dev->wiphy));
 559                 return -ETIMEDOUT;
 560         }
 561
 562         /* reload registers from eeprom */
 563         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_LOAD);
 564
 565         i = 10;
 566         do {
 567                 msleep(4);
 568                 if (!(rtl818x_ioread8(priv, &priv->map->EEPROM_CMD) &
 569                       RTL818X_EEPROM_CMD_CONFIG))
 570                         break;
 571         } while (--i);
 572
 573         if (!i) {
 574                 printk(KERN_ERR "%s: eeprom reset timeout!\n",
 575                        wiphy_name(dev->wiphy));
 576                 return -ETIMEDOUT;
 577         }
 578
 579         return 0;
 580 }
 581
 582 static int rtl8187_init_hw(struct ieee80211_hw *dev)
 583 {
 584         struct rtl8187_priv *priv = dev->priv;
 585         u8 reg;
 586         int res;
 587
 588         /* reset */
 589         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
 590                          RTL818X_EEPROM_CMD_CONFIG);
 591         reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
 592         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg |
 593                          RTL818X_CONFIG3_ANAPARAM_WRITE);
 594         rtl818x_iowrite32(priv, &priv->map->ANAPARAM,
 595                           RTL8187_RTL8225_ANAPARAM_ON);
 596         rtl818x_iowrite32(priv, &priv->map->ANAPARAM2,
 597                           RTL8187_RTL8225_ANAPARAM2_ON);
 598         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg &
 599                          ~RTL818X_CONFIG3_ANAPARAM_WRITE);
 600         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
 601                          RTL818X_EEPROM_CMD_NORMAL);
 602
 603         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);
 604
 605         msleep(200);
 606         rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x10);
 607         rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x11);
 608         rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x00);
 609         msleep(200);
 610
 611         res = rtl8187_cmd_reset(dev);
 612         if (res)
 613                 return res;
 614
 615         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
 616         reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
 617         rtl818x_iowrite8(priv, &priv->map->CONFIG3,
 618                         reg | RTL818X_CONFIG3_ANAPARAM_WRITE);
 619         rtl818x_iowrite32(priv, &priv->map->ANAPARAM,
 620                           RTL8187_RTL8225_ANAPARAM_ON);
 621         rtl818x_iowrite32(priv, &priv->map->ANAPARAM2,
 622                           RTL8187_RTL8225_ANAPARAM2_ON);
 623         rtl818x_iowrite8(priv, &priv->map->CONFIG3,
 624                         reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);
 625         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
 626
 627         /* setup card */
 628         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0);
 629         rtl818x_iowrite8(priv, &priv->map->GPIO, 0);
 630
 631         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, (4 << 8));
 632         rtl818x_iowrite8(priv, &priv->map->GPIO, 1);
 633         rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0);
 634
 635         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
 636
 637         rtl818x_iowrite16(priv, (__le16 *)0xFFF4, 0xFFFF);
 638         reg = rtl818x_ioread8(priv, &priv->map->CONFIG1);
 639         reg &= 0x3F;
 640         reg |= 0x80;
 641         rtl818x_iowrite8(priv, &priv->map->CONFIG1, reg);
 642
 643         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
 644
 645         rtl818x_iowrite32(priv, &priv->map->INT_TIMEOUT, 0);
 646         rtl818x_iowrite8(priv, &priv->map->WPA_CONF, 0);
 647         rtl818x_iowrite8(priv, &priv->map->RATE_FALLBACK, 0x81);
 648
 649         // TODO: set RESP_RATE and BRSR properly
 650         rtl818x_iowrite8(priv, &priv->map->RESP_RATE, (8 << 4) | 0);
 651         rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);
 652
 653         /* host_usb_init */
 654         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0);
 655         rtl818x_iowrite8(priv, &priv->map->GPIO, 0);
 656         reg = rtl818x_ioread8(priv, (u8 *)0xFE53);
 657         rtl818x_iowrite8(priv, (u8 *)0xFE53, reg | (1 << 7));
 658         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, (4 << 8));
 659         rtl818x_iowrite8(priv, &priv->map->GPIO, 0x20);
 660         rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0);
 661         rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, 0x80);
 662         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0x80);
 663         rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, 0x80);
 664         msleep(100);
 665
 666         rtl818x_iowrite32(priv, &priv->map->RF_TIMING, 0x000a8008);
 667         rtl818x_iowrite16(priv, &priv->map->BRSR, 0xFFFF);
 668         rtl818x_iowrite32(priv, &priv->map->RF_PARA, 0x00100044);
 669         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
 670                          RTL818X_EEPROM_CMD_CONFIG);
 671         rtl818x_iowrite8(priv, &priv->map->CONFIG3, 0x44);
 672         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
 673                          RTL818X_EEPROM_CMD_NORMAL);
 674         rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, 0x1FF7);
 675         msleep(100);
 676
 677         priv->rf->init(dev);
 678
 679         rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);
 680         reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~1;
 681         rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg | 1);
 682         rtl818x_iowrite16(priv, (__le16 *)0xFFFE, 0x10);
 683         rtl818x_iowrite8(priv, &priv->map->TALLY_SEL, 0x80);
 684         rtl818x_iowrite8(priv, (u8 *)0xFFFF, 0x60);
 685         rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
 686
 687         return 0;
 688 }
 689
 690 static const u8 rtl8187b_reg_table[][3] = {
 691         {0xF0, 0x32, 0}, {0xF1, 0x32, 0}, {0xF2, 0x00, 0}, {0xF3, 0x00, 0},
 692         {0xF4, 0x32, 0}, {0xF5, 0x43, 0}, {0xF6, 0x00, 0}, {0xF7, 0x00, 0},
 693         {0xF8, 0x46, 0}, {0xF9, 0xA4, 0}, {0xFA, 0x00, 0}, {0xFB, 0x00, 0},
 694         {0xFC, 0x96, 0}, {0xFD, 0xA4, 0}, {0xFE, 0x00, 0}, {0xFF, 0x00, 0},
 695
 696         {0x58, 0x4B, 1}, {0x59, 0x00, 1}, {0x5A, 0x4B, 1}, {0x5B, 0x00, 1},
 697         {0x60, 0x4B, 1}, {0x61, 0x09, 1}, {0x62, 0x4B, 1}, {0x63, 0x09, 1},
 698         {0xCE, 0x0F, 1}, {0xCF, 0x00, 1}, {0xE0, 0xFF, 1}, {0xE1, 0x0F, 1},
 699         {0xE2, 0x00, 1}, {0xF0, 0x4E, 1}, {0xF1, 0x01, 1}, {0xF2, 0x02, 1},
 700         {0xF3, 0x03, 1}, {0xF4, 0x04, 1}, {0xF5, 0x05, 1}, {0xF6, 0x06, 1},
 701         {0xF7, 0x07, 1}, {0xF8, 0x08, 1},
 702
 703         {0x4E, 0x00, 2}, {0x0C, 0x04, 2}, {0x21, 0x61, 2}, {0x22, 0x68, 2},
 704         {0x23, 0x6F, 2}, {0x24, 0x76, 2}, {0x25, 0x7D, 2}, {0x26, 0x84, 2},
 705         {0x27, 0x8D, 2}, {0x4D, 0x08, 2}, {0x50, 0x05, 2}, {0x51, 0xF5, 2},
 706         {0x52, 0x04, 2}, {0x53, 0xA0, 2}, {0x54, 0x1F, 2}, {0x55, 0x23, 2},
 707         {0x56, 0x45, 2}, {0x57, 0x67, 2}, {0x58, 0x08, 2}, {0x59, 0x08, 2},
 708         {0x5A, 0x08, 2}, {0x5B, 0x08, 2}, {0x60, 0x08, 2}, {0x61, 0x08, 2},
 709         {0x62, 0x08, 2}, {0x63, 0x08, 2}, {0x64, 0xCF, 2}, {0x72, 0x56, 2},
 710         {0x73, 0x9A, 2},
 711
 712         {0x34, 0xF0, 0}, {0x35, 0x0F, 0}, {0x5B, 0x40, 0}, {0x84, 0x88, 0},
 713         {0x85, 0x24, 0}, {0x88, 0x54, 0}, {0x8B, 0xB8, 0}, {0x8C, 0x07, 0},
 714         {0x8D, 0x00, 0}, {0x94, 0x1B, 0}, {0x95, 0x12, 0}, {0x96, 0x00, 0},
 715         {0x97, 0x06, 0}, {0x9D, 0x1A, 0}, {0x9F, 0x10, 0}, {0xB4, 0x22, 0},
 716         {0xBE, 0x80, 0}, {0xDB, 0x00, 0}, {0xEE, 0x00, 0}, {0x91, 0x03, 0},
 717
 718         {0x4C, 0x00, 2}, {0x9F, 0x00, 3}, {0x8C, 0x01, 0}, {0x8D, 0x10, 0},
 719         {0x8E, 0x08, 0}, {0x8F, 0x00, 0}
 720 };
 721
 722 static int rtl8187b_init_hw(struct ieee80211_hw *dev)
 723 {
 724         struct rtl8187_priv *priv = dev->priv;
 725         int res, i;
 726         u8 reg;
 727
 728         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
 729                          RTL818X_EEPROM_CMD_CONFIG);
 730
 731         reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
 732         reg |= RTL818X_CONFIG3_ANAPARAM_WRITE | RTL818X_CONFIG3_GNT_SELECT;
 733         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg);
 734         rtl818x_iowrite32(priv, &priv->map->ANAPARAM2,
 735                           RTL8187B_RTL8225_ANAPARAM2_ON);
 736         rtl818x_iowrite32(priv, &priv->map->ANAPARAM,
 737                           RTL8187B_RTL8225_ANAPARAM_ON);
 738         rtl818x_iowrite8(priv, &priv->map->ANAPARAM3,
 739                          RTL8187B_RTL8225_ANAPARAM3_ON);
 740
 741         rtl818x_iowrite8(priv, (u8 *)0xFF61, 0x10);
 742         reg = rtl818x_ioread8(priv, (u8 *)0xFF62);
 743         rtl818x_iowrite8(priv, (u8 *)0xFF62, reg & ~(1 << 5));
 744         rtl818x_iowrite8(priv, (u8 *)0xFF62, reg | (1 << 5));
 745
 746         reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
 747         reg &= ~RTL818X_CONFIG3_ANAPARAM_WRITE;
 748         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg);
 749
 750         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
 751                          RTL818X_EEPROM_CMD_NORMAL);
 752
 753         res = rtl8187_cmd_reset(dev);
 754         if (res)
 755                 return res;
 756
 757         rtl818x_iowrite16(priv, (__le16 *)0xFF2D, 0x0FFF);
 758         reg = rtl818x_ioread8(priv, &priv->map->CW_CONF);
 759         reg |= RTL818X_CW_CONF_PERPACKET_RETRY_SHIFT;
 760         rtl818x_iowrite8(priv, &priv->map->CW_CONF, reg);
 761         reg = rtl818x_ioread8(priv, &priv->map->TX_AGC_CTL);
 762         reg |= RTL818X_TX_AGC_CTL_PERPACKET_GAIN_SHIFT |
 763                RTL818X_TX_AGC_CTL_PERPACKET_ANTSEL_SHIFT;
 764         rtl818x_iowrite8(priv, &priv->map->TX_AGC_CTL, reg);
 765
 766         rtl818x_iowrite16_idx(priv, (__le16 *)0xFFE0, 0x0FFF, 1);
 767         reg = rtl818x_ioread8(priv, &priv->map->RATE_FALLBACK);
 768         reg |= RTL818X_RATE_FALLBACK_ENABLE;
 769         rtl818x_iowrite8(priv, &priv->map->RATE_FALLBACK, reg);
 770
 771         rtl818x_iowrite16(priv, &priv->map->BEACON_INTERVAL, 100);
 772         rtl818x_iowrite16(priv, &priv->map->ATIM_WND, 2);
 773         rtl818x_iowrite16_idx(priv, (__le16 *)0xFFD4, 0xFFFF, 1);
 774
 775         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
 776                          RTL818X_EEPROM_CMD_CONFIG);
 777         reg = rtl818x_ioread8(priv, &priv->map->CONFIG1);
 778         rtl818x_iowrite8(priv, &priv->map->CONFIG1, (reg & 0x3F) | 0x80);
 779         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
 780                          RTL818X_EEPROM_CMD_NORMAL);
 781
 782         rtl818x_iowrite8(priv, &priv->map->WPA_CONF, 0);
 783         for (i = 0; i < ARRAY_SIZE(rtl8187b_reg_table); i++) {
 784                 rtl818x_iowrite8_idx(priv,
 785                                      (u8 *)(uintptr_t)
 786                                      (rtl8187b_reg_table[i][0] | 0xFF00),
 787                                      rtl8187b_reg_table[i][1],
 788                                      rtl8187b_reg_table[i][2]);
 789         }
 790
 791         rtl818x_iowrite16(priv, &priv->map->TID_AC_MAP, 0xFA50);
 792         rtl818x_iowrite16(priv, &priv->map->INT_MIG, 0);
 793
 794         rtl818x_iowrite32_idx(priv, (__le32 *)0xFFF0, 0, 1);
 795         rtl818x_iowrite32_idx(priv, (__le32 *)0xFFF4, 0, 1);
 796         rtl818x_iowrite8_idx(priv, (u8 *)0xFFF8, 0, 1);
 797
 798         rtl818x_iowrite32(priv, &priv->map->RF_TIMING, 0x00004001);
 799
 800         rtl818x_iowrite16_idx(priv, (__le16 *)0xFF72, 0x569A, 2);
 801
 802         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
 803                          RTL818X_EEPROM_CMD_CONFIG);
 804         reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
 805         reg |= RTL818X_CONFIG3_ANAPARAM_WRITE;
 806         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg);
 807         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
 808                          RTL818X_EEPROM_CMD_NORMAL);
 809
 810         rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, 0x0480);
 811         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0x2488);
 812         rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, 0x1FFF);
 813         msleep(100);
 814
 815         priv->rf->init(dev);
 816
 817         reg = RTL818X_CMD_TX_ENABLE | RTL818X_CMD_RX_ENABLE;
 818         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
 819         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0xFFFF);
 820
 821         rtl818x_iowrite8(priv, (u8 *)0xFE41, 0xF4);
 822         rtl818x_iowrite8(priv, (u8 *)0xFE40, 0x00);
 823         rtl818x_iowrite8(priv, (u8 *)0xFE42, 0x00);
 824         rtl818x_iowrite8(priv, (u8 *)0xFE42, 0x01);
 825         rtl818x_iowrite8(priv, (u8 *)0xFE40, 0x0F);
 826         rtl818x_iowrite8(priv, (u8 *)0xFE42, 0x00);
 827         rtl818x_iowrite8(priv, (u8 *)0xFE42, 0x01);
 828
 829         reg = rtl818x_ioread8(priv, (u8 *)0xFFDB);
 830         rtl818x_iowrite8(priv, (u8 *)0xFFDB, reg | (1 << 2));
 831         rtl818x_iowrite16_idx(priv, (__le16 *)0xFF72, 0x59FA, 3);
 832         rtl818x_iowrite16_idx(priv, (__le16 *)0xFF74, 0x59D2, 3);
 833         rtl818x_iowrite16_idx(priv, (__le16 *)0xFF76, 0x59D2, 3);
 834         rtl818x_iowrite16_idx(priv, (__le16 *)0xFF78, 0x19FA, 3);
 835         rtl818x_iowrite16_idx(priv, (__le16 *)0xFF7A, 0x19FA, 3);
 836         rtl818x_iowrite16_idx(priv, (__le16 *)0xFF7C, 0x00D0, 3);
 837         rtl818x_iowrite8(priv, (u8 *)0xFF61, 0);
 838         rtl818x_iowrite8_idx(priv, (u8 *)0xFF80, 0x0F, 1);
 839         rtl818x_iowrite8_idx(priv, (u8 *)0xFF83, 0x03, 1);
 840         rtl818x_iowrite8(priv, (u8 *)0xFFDA, 0x10);
 841         rtl818x_iowrite8_idx(priv, (u8 *)0xFF4D, 0x08, 2);
 842
 843         rtl818x_iowrite32(priv, &priv->map->HSSI_PARA, 0x0600321B);
 844
 845         rtl818x_iowrite16_idx(priv, (__le16 *)0xFFEC, 0x0800, 1);
 846
 847         priv->slot_time = 0x9;
 848         priv->aifsn[0] = 2; /* AIFSN[AC_VO] */
 849         priv->aifsn[1] = 2; /* AIFSN[AC_VI] */
 850         priv->aifsn[2] = 7; /* AIFSN[AC_BK] */
 851         priv->aifsn[3] = 3; /* AIFSN[AC_BE] */
 852         rtl818x_iowrite8(priv, &priv->map->ACM_CONTROL, 0);
 853
 854         return 0;
 855 }
 856
 857 static int rtl8187_start(struct ieee80211_hw *dev)
 858 {
 859         struct rtl8187_priv *priv = dev->priv;
 860         u32 reg;
 861         int ret;
 862
 863         ret = (!priv->is_rtl8187b) ? rtl8187_init_hw(dev) :
 864                                      rtl8187b_init_hw(dev);
 865         if (ret)
 866                 return ret;
 867
 868         mutex_lock(&priv->conf_mutex);
 869
 870         init_usb_anchor(&priv->anchored);
 871
 872         if (priv->is_rtl8187b) {
 873                 reg = RTL818X_RX_CONF_MGMT |
 874                       RTL818X_RX_CONF_DATA |
 875                       RTL818X_RX_CONF_BROADCAST |
 876                       RTL818X_RX_CONF_NICMAC |
 877                       RTL818X_RX_CONF_BSSID |
 878                       (7 << 13 /* RX FIFO threshold NONE */) |
 879                       (7 << 10 /* MAX RX DMA */) |
 880                       RTL818X_RX_CONF_RX_AUTORESETPHY |
 881                       RTL818X_RX_CONF_ONLYERLPKT |
 882                       RTL818X_RX_CONF_MULTICAST;
 883                 priv->rx_conf = reg;
 884                 rtl818x_iowrite32(priv, &priv->map->RX_CONF, reg);
 885
 886                 rtl818x_iowrite32(priv, &priv->map->TX_CONF,
 887                                   RTL818X_TX_CONF_HW_SEQNUM |
 888                                   RTL818X_TX_CONF_DISREQQSIZE |
 889                                   (7 << 8  /* short retry limit */) |
 890                                   (7 << 0  /* long retry limit */) |
 891                                   (7 << 21 /* MAX TX DMA */));
 892                 rtl8187_init_urbs(dev);
 893                 rtl8187b_init_status_urb(dev);
 894                 mutex_unlock(&priv->conf_mutex);
 895                 return 0;
 896         }
 897
 898         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0xFFFF);
 899
 900         rtl818x_iowrite32(priv, &priv->map->MAR[0], ~0);
 901         rtl818x_iowrite32(priv, &priv->map->MAR[1], ~0);
 902
 903         rtl8187_init_urbs(dev);
 904
 905         reg = RTL818X_RX_CONF_ONLYERLPKT |
 906               RTL818X_RX_CONF_RX_AUTORESETPHY |
 907               RTL818X_RX_CONF_BSSID |
 908               RTL818X_RX_CONF_MGMT |
 909               RTL818X_RX_CONF_DATA |
 910               (7 << 13 /* RX FIFO threshold NONE */) |
 911               (7 << 10 /* MAX RX DMA */) |
 912               RTL818X_RX_CONF_BROADCAST |
 913               RTL818X_RX_CONF_NICMAC;
 914
 915         priv->rx_conf = reg;
 916         rtl818x_iowrite32(priv, &priv->map->RX_CONF, reg);
 917
 918         reg = rtl818x_ioread8(priv, &priv->map->CW_CONF);
 919         reg &= ~RTL818X_CW_CONF_PERPACKET_CW_SHIFT;
 920         reg |= RTL818X_CW_CONF_PERPACKET_RETRY_SHIFT;
 921         rtl818x_iowrite8(priv, &priv->map->CW_CONF, reg);
 922
 923         reg = rtl818x_ioread8(priv, &priv->map->TX_AGC_CTL);
 924         reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_GAIN_SHIFT;
 925         reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_ANTSEL_SHIFT;
 926         reg &= ~RTL818X_TX_AGC_CTL_FEEDBACK_ANT;
 927         rtl818x_iowrite8(priv, &priv->map->TX_AGC_CTL, reg);
 928
 929         reg  = RTL818X_TX_CONF_CW_MIN |
 930                (7 << 21 /* MAX TX DMA */) |
 931                RTL818X_TX_CONF_NO_ICV;
 932         rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);
 933
 934         reg = rtl818x_ioread8(priv, &priv->map->CMD);
 935         reg |= RTL818X_CMD_TX_ENABLE;
 936         reg |= RTL818X_CMD_RX_ENABLE;
 937         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
 938         mutex_unlock(&priv->conf_mutex);
 939
 940         return 0;
 941 }
 942
 943 static void rtl8187_stop(struct ieee80211_hw *dev)
 944 {
 945         struct rtl8187_priv *priv = dev->priv;
 946         struct sk_buff *skb;
 947         u32 reg;
 948
 949         mutex_lock(&priv->conf_mutex);
 950         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);
 951
 952         reg = rtl818x_ioread8(priv, &priv->map->CMD);
 953         reg &= ~RTL818X_CMD_TX_ENABLE;
 954         reg &= ~RTL818X_CMD_RX_ENABLE;
 955         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
 956
 957         priv->rf->stop(dev);
 958
 959         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
 960         reg = rtl818x_ioread8(priv, &priv->map->CONFIG4);
 961         rtl818x_iowrite8(priv, &priv->map->CONFIG4, reg | RTL818X_CONFIG4_VCOOFF);
 962         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
 963
 964         while ((skb = skb_dequeue(&priv->b_tx_status.queue)))
 965                 dev_kfree_skb_any(skb);
 966
 967         usb_kill_anchored_urbs(&priv->anchored);
 968         mutex_unlock(&priv->conf_mutex);
 969 }
 970
 971 static int rtl8187_add_interface(struct ieee80211_hw *dev,
 972                                  struct ieee80211_if_init_conf *conf)
 973 {
 974         struct rtl8187_priv *priv = dev->priv;
 975         int i;
 976
 977         if (priv->mode != NL80211_IFTYPE_MONITOR)
 978                 return -EOPNOTSUPP;
 979
 980         switch (conf->type) {
 981         case NL80211_IFTYPE_STATION:
 982                 priv->mode = conf->type;
 983                 break;
 984         default:
 985                 return -EOPNOTSUPP;
 986         }
 987
 988         mutex_lock(&priv->conf_mutex);
 989         priv->vif = conf->vif;
 990
 991         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
 992         for (i = 0; i < ETH_ALEN; i++)
 993                 rtl818x_iowrite8(priv, &priv->map->MAC[i],
 994                                  ((u8 *)conf->mac_addr)[i]);
 995         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
 996
 997         mutex_unlock(&priv->conf_mutex);
 998         return 0;
 999 }
1000
1001 static void rtl8187_remove_interface(struct ieee80211_hw *dev,
1002                                      struct ieee80211_if_init_conf *conf)
1003 {
1004         struct rtl8187_priv *priv = dev->priv;
1005         mutex_lock(&priv->conf_mutex);
1006         priv->mode = NL80211_IFTYPE_MONITOR;
1007         priv->vif = NULL;
1008         mutex_unlock(&priv->conf_mutex);
1009 }
1010
1011 static int rtl8187_config(struct ieee80211_hw *dev, u32 changed)
1012 {
1013         struct rtl8187_priv *priv = dev->priv;
1014         struct ieee80211_conf *conf = &dev->conf;
1015         u32 reg;
1016
1017         mutex_lock(&priv->conf_mutex);
1018         reg = rtl818x_ioread32(priv, &priv->map->TX_CONF);
1019         /* Enable TX loopback on MAC level to avoid TX during channel
1020          * changes, as this has be seen to causes problems and the
1021          * card will stop work until next reset
1022          */
1023         rtl818x_iowrite32(priv, &priv->map->TX_CONF,
1024                           reg | RTL818X_TX_CONF_LOOPBACK_MAC);
1025         priv->rf->set_chan(dev, conf);
1026         msleep(10);
1027         rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);
1028
1029         rtl818x_iowrite16(priv, &priv->map->ATIM_WND, 2);
1030         rtl818x_iowrite16(priv, &priv->map->ATIMTR_INTERVAL, 100);
1031         rtl818x_iowrite16(priv, &priv->map->BEACON_INTERVAL, 100);
1032         rtl818x_iowrite16(priv, &priv->map->BEACON_INTERVAL_TIME, 100);
1033         mutex_unlock(&priv->conf_mutex);
1034         return 0;
1035 }
1036
1037 static int rtl8187_config_interface(struct ieee80211_hw *dev,
1038                                     struct ieee80211_vif *vif,
1039                                     struct ieee80211_if_conf *conf)
1040 {
1041         struct rtl8187_priv *priv = dev->priv;
1042         int i;
1043         u8 reg;
1044
1045         mutex_lock(&priv->conf_mutex);
1046         for (i = 0; i < ETH_ALEN; i++)
1047                 rtl818x_iowrite8(priv, &priv->map->BSSID[i], conf->bssid[i]);
1048
1049         if (is_valid_ether_addr(conf->bssid)) {
1050                 reg = RTL818X_MSR_INFRA;
1051                 if (priv->is_rtl8187b)
1052                         reg |= RTL818X_MSR_ENEDCA;
1053                 rtl818x_iowrite8(priv, &priv->map->MSR, reg);
1054         } else {
1055                 reg = RTL818X_MSR_NO_LINK;
1056                 rtl818x_iowrite8(priv, &priv->map->MSR, reg);
1057         }
1058
1059         mutex_unlock(&priv->conf_mutex);
1060         return 0;
1061 }
1062
1063 /*
1064  * With 8187B, AC_*_PARAM clashes with FEMR definition in struct rtl818x_csr for
1065  * example. Thus we have to use raw values for AC_*_PARAM register addresses.
1066  */
1067 static __le32 *rtl8187b_ac_addr[4] = {
1068         (__le32 *) 0xFFF0, /* AC_VO */
1069         (__le32 *) 0xFFF4, /* AC_VI */
1070         (__le32 *) 0xFFFC, /* AC_BK */
1071         (__le32 *) 0xFFF8, /* AC_BE */
1072 };
1073
1074 #define SIFS_TIME 0xa
1075
1076 static void rtl8187_conf_erp(struct rtl8187_priv *priv, bool use_short_slot,
1077                              bool use_short_preamble)
1078 {
1079         if (priv->is_rtl8187b) {
1080                 u8 difs, eifs;
1081                 u16 ack_timeout;
1082                 int queue;
1083
1084                 if (use_short_slot) {
1085                         priv->slot_time = 0x9;
1086                         difs = 0x1c;
1087                         eifs = 0x53;
1088                 } else {
1089                         priv->slot_time = 0x14;
1090                         difs = 0x32;
1091                         eifs = 0x5b;
1092                 }
1093                 rtl818x_iowrite8(priv, &priv->map->SIFS, 0x22);
1094                 rtl818x_iowrite8(priv, &priv->map->SLOT, priv->slot_time);
1095                 rtl818x_iowrite8(priv, &priv->map->DIFS, difs);
1096
1097                 /*
1098                  * BRSR+1 on 8187B is in fact EIFS register
1099                  * Value in units of 4 us
1100                  */
1101                 rtl818x_iowrite8(priv, (u8 *)&priv->map->BRSR + 1, eifs);
1102
1103                 /*
1104                  * For 8187B, CARRIER_SENSE_COUNTER is in fact ack timeout
1105                  * register. In units of 4 us like eifs register
1106                  * ack_timeout = ack duration + plcp + difs + preamble
1107                  */
1108                 ack_timeout = 112 + 48 + difs;
1109                 if (use_short_preamble)
1110                         ack_timeout += 72;
1111                 else
1112                         ack_timeout += 144;
1113                 rtl818x_iowrite8(priv, &priv->map->CARRIER_SENSE_COUNTER,
1114                                  DIV_ROUND_UP(ack_timeout, 4));
1115
1116                 for (queue = 0; queue < 4; queue++)
1117                         rtl818x_iowrite8(priv, (u8 *) rtl8187b_ac_addr[queue],
1118                                          priv->aifsn[queue] * priv->slot_time +
1119                                          SIFS_TIME);
1120         } else {
1121                 rtl818x_iowrite8(priv, &priv->map->SIFS, 0x22);
1122                 if (use_short_slot) {
1123                         rtl818x_iowrite8(priv, &priv->map->SLOT, 0x9);
1124                         rtl818x_iowrite8(priv, &priv->map->DIFS, 0x14);
1125                         rtl818x_iowrite8(priv, &priv->map->EIFS, 91 - 0x14);
1126                 } else {
1127                         rtl818x_iowrite8(priv, &priv->map->SLOT, 0x14);
1128                         rtl818x_iowrite8(priv, &priv->map->DIFS, 0x24);
1129                         rtl818x_iowrite8(priv, &priv->map->EIFS, 91 - 0x24);
1130                 }
1131         }
1132 }
1133
1134 static void rtl8187_bss_info_changed(struct ieee80211_hw *dev,
1135                                      struct ieee80211_vif *vif,
1136                                      struct ieee80211_bss_conf *info,
1137                                      u32 changed)
1138 {
1139         struct rtl8187_priv *priv = dev->priv;
1140
1141         if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_ERP_PREAMBLE))
1142                 rtl8187_conf_erp(priv, info->use_short_slot,
1143                                  info->use_short_preamble);
1144 }
1145
1146 static void rtl8187_configure_filter(struct ieee80211_hw *dev,
1147                                      unsigned int changed_flags,
1148                                      unsigned int *total_flags,
1149                                      int mc_count, struct dev_addr_list *mclist)
1150 {
1151         struct rtl8187_priv *priv = dev->priv;
1152
1153         if (changed_flags & FIF_FCSFAIL)
1154                 priv->rx_conf ^= RTL818X_RX_CONF_FCS;
1155         if (changed_flags & FIF_CONTROL)
1156                 priv->rx_conf ^= RTL818X_RX_CONF_CTRL;
1157         if (changed_flags & FIF_OTHER_BSS)
1158                 priv->rx_conf ^= RTL818X_RX_CONF_MONITOR;
1159         if (*total_flags & FIF_ALLMULTI || mc_count > 0)
1160                 priv->rx_conf |= RTL818X_RX_CONF_MULTICAST;
1161         else
1162                 priv->rx_conf &= ~RTL818X_RX_CONF_MULTICAST;
1163
1164         *total_flags = 0;
1165
1166         if (priv->rx_conf & RTL818X_RX_CONF_FCS)
1167                 *total_flags |= FIF_FCSFAIL;
1168         if (priv->rx_conf & RTL818X_RX_CONF_CTRL)
1169                 *total_flags |= FIF_CONTROL;
1170         if (priv->rx_conf & RTL818X_RX_CONF_MONITOR)
1171                 *total_flags |= FIF_OTHER_BSS;
1172         if (priv->rx_conf & RTL818X_RX_CONF_MULTICAST)
1173                 *total_flags |= FIF_ALLMULTI;
1174
1175         rtl818x_iowrite32_async(priv, &priv->map->RX_CONF, priv->rx_conf);
1176 }
1177
1178 static int rtl8187_conf_tx(struct ieee80211_hw *dev, u16 queue,
1179                            const struct ieee80211_tx_queue_params *params)
1180 {
1181         struct rtl8187_priv *priv = dev->priv;
1182         u8 cw_min, cw_max;
1183
1184         if (queue > 3)
1185                 return -EINVAL;
1186
1187         cw_min = fls(params->cw_min);
1188         cw_max = fls(params->cw_max);
1189
1190         if (priv->is_rtl8187b) {
1191                 priv->aifsn[queue] = params->aifs;
1192
1193                 /*
1194                  * This is the structure of AC_*_PARAM registers in 8187B:
1195                  * - TXOP limit field, bit offset = 16
1196                  * - ECWmax, bit offset = 12
1197                  * - ECWmin, bit offset = 8
1198                  * - AIFS, bit offset = 0
1199                  */
1200                 rtl818x_iowrite32(priv, rtl8187b_ac_addr[queue],
1201                                   (params->txop << 16) | (cw_max << 12) |
1202                                   (cw_min << 8) | (params->aifs *
1203                                   priv->slot_time + SIFS_TIME));
1204         } else {
1205                 if (queue != 0)
1206                         return -EINVAL;
1207
1208                 rtl818x_iowrite8(priv, &priv->map->CW_VAL,
1209                                  cw_min | (cw_max << 4));
1210         }
1211         return 0;
1212 }
1213
1214 static const struct ieee80211_ops rtl8187_ops = {
1215         .tx                     = rtl8187_tx,
1216         .start                  = rtl8187_start,
1217         .stop                   = rtl8187_stop,
1218         .add_interface          = rtl8187_add_interface,
1219         .remove_interface       = rtl8187_remove_interface,
1220         .config                 = rtl8187_config,
1221         .config_interface       = rtl8187_config_interface,
1222         .bss_info_changed       = rtl8187_bss_info_changed,
1223         .configure_filter       = rtl8187_configure_filter,
1224         .conf_tx                = rtl8187_conf_tx
1225 };
1226
1227 static void rtl8187_eeprom_register_read(struct eeprom_93cx6 *eeprom)
1228 {
1229         struct ieee80211_hw *dev = eeprom->data;
1230         struct rtl8187_priv *priv = dev->priv;
1231         u8 reg = rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);
1232
1233         eeprom->reg_data_in = reg & RTL818X_EEPROM_CMD_WRITE;
1234         eeprom->reg_data_out = reg & RTL818X_EEPROM_CMD_READ;
1235         eeprom->reg_data_clock = reg & RTL818X_EEPROM_CMD_CK;
1236         eeprom->reg_chip_select = reg & RTL818X_EEPROM_CMD_CS;
1237 }
1238
1239 static void rtl8187_eeprom_register_write(struct eeprom_93cx6 *eeprom)
1240 {
1241         struct ieee80211_hw *dev = eeprom->data;
1242         struct rtl8187_priv *priv = dev->priv;
1243         u8 reg = RTL818X_EEPROM_CMD_PROGRAM;
1244
1245         if (eeprom->reg_data_in)
1246                 reg |= RTL818X_EEPROM_CMD_WRITE;
1247         if (eeprom->reg_data_out)
1248                 reg |= RTL818X_EEPROM_CMD_READ;
1249         if (eeprom->reg_data_clock)
1250                 reg |= RTL818X_EEPROM_CMD_CK;
1251         if (eeprom->reg_chip_select)
1252                 reg |= RTL818X_EEPROM_CMD_CS;
1253
1254         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, reg);
1255         udelay(10);
1256 }
1257
1258 static int __devinit rtl8187_probe(struct usb_interface *intf,
1259                                    const struct usb_device_id *id)
1260 {
1261         struct usb_device *udev = interface_to_usbdev(intf);
1262         struct ieee80211_hw *dev;
1263         struct rtl8187_priv *priv;
1264         struct eeprom_93cx6 eeprom;
1265         struct ieee80211_channel *channel;
1266         const char *chip_name;
1267         u16 txpwr, reg;
1268         int err, i;
1269
1270         dev = ieee80211_alloc_hw(sizeof(*priv), &rtl8187_ops);
1271         if (!dev) {
1272                 printk(KERN_ERR "rtl8187: ieee80211 alloc failed\n");
1273                 return -ENOMEM;
1274         }
1275
1276         priv = dev->priv;
1277         priv->is_rtl8187b = (id->driver_info == DEVICE_RTL8187B);
1278
1279         SET_IEEE80211_DEV(dev, &intf->dev);
1280         usb_set_intfdata(intf, dev);
1281         priv->udev = udev;
1282
1283         usb_get_dev(udev);
1284
1285         skb_queue_head_init(&priv->rx_queue);
1286
1287         BUILD_BUG_ON(sizeof(priv->channels) != sizeof(rtl818x_channels));
1288         BUILD_BUG_ON(sizeof(priv->rates) != sizeof(rtl818x_rates));
1289
1290         memcpy(priv->channels, rtl818x_channels, sizeof(rtl818x_channels));
1291         memcpy(priv->rates, rtl818x_rates, sizeof(rtl818x_rates));
1292         priv->map = (struct rtl818x_csr *)0xFF00;
1293
1294         priv->band.band = IEEE80211_BAND_2GHZ;
1295         priv->band.channels = priv->channels;
1296         priv->band.n_channels = ARRAY_SIZE(rtl818x_channels);
1297         priv->band.bitrates = priv->rates;
1298         priv->band.n_bitrates = ARRAY_SIZE(rtl818x_rates);
1299         dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;
1300
1301
1302         priv->mode = NL80211_IFTYPE_MONITOR;
1303         dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
1304                      IEEE80211_HW_SIGNAL_DBM |
1305                      IEEE80211_HW_RX_INCLUDES_FCS;
1306
1307         eeprom.data = dev;
1308         eeprom.register_read = rtl8187_eeprom_register_read;
1309         eeprom.register_write = rtl8187_eeprom_register_write;
1310         if (rtl818x_ioread32(priv, &priv->map->RX_CONF) & (1 << 6))
1311                 eeprom.width = PCI_EEPROM_WIDTH_93C66;
1312         else
1313                 eeprom.width = PCI_EEPROM_WIDTH_93C46;
1314
1315         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
1316         udelay(10);
1317
1318         eeprom_93cx6_multiread(&eeprom, RTL8187_EEPROM_MAC_ADDR,
1319                                (__le16 __force *)dev->wiphy->perm_addr, 3);
1320         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
1321                 printk(KERN_WARNING "rtl8187: Invalid hwaddr! Using randomly "
1322                        "generated MAC address\n");
1323                 random_ether_addr(dev->wiphy->perm_addr);
1324         }
1325
1326         channel = priv->channels;
1327         for (i = 0; i < 3; i++) {
1328                 eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_1 + i,
1329                                   &txpwr);
1330                 (*channel++).hw_value = txpwr & 0xFF;
1331                 (*channel++).hw_value = txpwr >> 8;
1332         }
1333         for (i = 0; i < 2; i++) {
1334                 eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_4 + i,
1335                                   &txpwr);
1336                 (*channel++).hw_value = txpwr & 0xFF;
1337                 (*channel++).hw_value = txpwr >> 8;
1338         }
1339
1340         eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_BASE,
1341                           &priv->txpwr_base);
1342
1343         reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~1;
1344         rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg | 1);
1345         /* 0 means asic B-cut, we should use SW 3 wire
1346          * bit-by-bit banging for radio. 1 means we can use
1347          * USB specific request to write radio registers */
1348         priv->asic_rev = rtl818x_ioread8(priv, (u8 *)0xFFFE) & 0x3;
1349         rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
1350         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
1351
1352         if (!priv->is_rtl8187b) {
1353                 u32 reg32;
1354                 reg32 = rtl818x_ioread32(priv, &priv->map->TX_CONF);
1355                 reg32 &= RTL818X_TX_CONF_HWVER_MASK;
1356                 switch (reg32) {
1357                 case RTL818X_TX_CONF_R8187vD_B:
1358                         /* Some RTL8187B devices have a USB ID of 0x8187
1359                          * detect them here */
1360                         chip_name = "RTL8187BvB(early)";
1361                         priv->is_rtl8187b = 1;
1362                         priv->hw_rev = RTL8187BvB;
1363                         break;
1364                 case RTL818X_TX_CONF_R8187vD:
1365                         chip_name = "RTL8187vD";
1366                         break;
1367                 default:
1368                         chip_name = "RTL8187vB (default)";
1369                 }
1370        } else {
1371                 /*
1372                  * Force USB request to write radio registers for 8187B, Realtek
1373                  * only uses it in their sources
1374                  */
1375                 /*if (priv->asic_rev == 0) {
1376                         printk(KERN_WARNING "rtl8187: Forcing use of USB "
1377                                "requests to write to radio registers\n");
1378                         priv->asic_rev = 1;
1379                 }*/
1380                 switch (rtl818x_ioread8(priv, (u8 *)0xFFE1)) {
1381                 case RTL818X_R8187B_B:
1382                         chip_name = "RTL8187BvB";
1383                         priv->hw_rev = RTL8187BvB;
1384                         break;
1385                 case RTL818X_R8187B_D:
1386                         chip_name = "RTL8187BvD";
1387                         priv->hw_rev = RTL8187BvD;
1388                         break;
1389                 case RTL818X_R8187B_E:
1390                         chip_name = "RTL8187BvE";
1391                         priv->hw_rev = RTL8187BvE;
1392                         break;
1393                 default:
1394                         chip_name = "RTL8187BvB (default)";
1395                         priv->hw_rev = RTL8187BvB;
1396                 }
1397         }
1398
1399         if (!priv->is_rtl8187b) {
1400                 for (i = 0; i < 2; i++) {
1401                         eeprom_93cx6_read(&eeprom,
1402                                           RTL8187_EEPROM_TXPWR_CHAN_6 + i,
1403                                           &txpwr);
1404                         (*channel++).hw_value = txpwr & 0xFF;
1405                         (*channel++).hw_value = txpwr >> 8;
1406                 }
1407         } else {
1408                 eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_6,
1409                                   &txpwr);
1410                 (*channel++).hw_value = txpwr & 0xFF;
1411
1412                 eeprom_93cx6_read(&eeprom, 0x0A, &txpwr);
1413                 (*channel++).hw_value = txpwr & 0xFF;
1414
1415                 eeprom_93cx6_read(&eeprom, 0x1C, &txpwr);
1416                 (*channel++).hw_value = txpwr & 0xFF;
1417                 (*channel++).hw_value = txpwr >> 8;
1418         }
1419
1420         if (priv->is_rtl8187b)
1421                 printk(KERN_WARNING "rtl8187: 8187B chip detected.\n");
1422
1423         /*
1424          * XXX: Once this driver supports anything that requires
1425          *      beacons it must implement IEEE80211_TX_CTL_ASSIGN_SEQ.
1426          */
1427         dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1428
1429         if ((id->driver_info == DEVICE_RTL8187) && priv->is_rtl8187b)
1430                 printk(KERN_INFO "rtl8187: inconsistency between id with OEM"
1431                        " info!\n");
1432
1433         priv->rf = rtl8187_detect_rf(dev);
1434         dev->extra_tx_headroom = (!priv->is_rtl8187b) ?
1435                                   sizeof(struct rtl8187_tx_hdr) :
1436                                   sizeof(struct rtl8187b_tx_hdr);
1437         if (!priv->is_rtl8187b)
1438                 dev->queues = 1;
1439         else
1440                 dev->queues = 4;
1441
1442         err = ieee80211_register_hw(dev);
1443         if (err) {
1444                 printk(KERN_ERR "rtl8187: Cannot register device\n");
1445                 goto err_free_dev;
1446         }
1447         mutex_init(&priv->conf_mutex);
1448         skb_queue_head_init(&priv->b_tx_status.queue);
1449
1450         printk(KERN_INFO "%s: hwaddr %pM, %s V%d + %s\n",
1451                wiphy_name(dev->wiphy), dev->wiphy->perm_addr,
1452                chip_name, priv->asic_rev, priv->rf->name);
1453
1454         return 0;
1455
1456  err_free_dev:
1457         ieee80211_free_hw(dev);
1458         usb_set_intfdata(intf, NULL);
1459         usb_put_dev(udev);
1460         return err;
1461 }
1462
1463 static void __devexit rtl8187_disconnect(struct usb_interface *intf)
1464 {
1465         struct ieee80211_hw *dev = usb_get_intfdata(intf);
1466         struct rtl8187_priv *priv;
1467
1468         if (!dev)
1469                 return;
1470
1471         ieee80211_unregister_hw(dev);
1472
1473         priv = dev->priv;
1474         usb_put_dev(interface_to_usbdev(intf));
1475         ieee80211_free_hw(dev);
1476 }
1477
1478 static struct usb_driver rtl8187_driver = {
1479         .name           = KBUILD_MODNAME,
1480         .id_table       = rtl8187_table,
1481         .probe          = rtl8187_probe,
1482         .disconnect     = __devexit_p(rtl8187_disconnect),
1483 };
1484
1485 static int __init rtl8187_init(void)
1486 {
1487         return usb_register(&rtl8187_driver);
1488 }
1489
1490 static void __exit rtl8187_exit(void)
1491 {
1492         usb_deregister(&rtl8187_driver);
1493 }
1494
1495 module_init(rtl8187_init);
1496 module_exit(rtl8187_exit);