drivers/net/wireless/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  * Magic delays and register offsets below are taken from the original
  11  * r8187 driver sources.  Thanks to Realtek for their support!
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License version 2 as
  15  * published by the Free Software Foundation.
  16  */
  17
  18 #include <linux/init.h>
  19 #include <linux/usb.h>
  20 #include <linux/delay.h>
  21 #include <linux/etherdevice.h>
  22 #include <linux/eeprom_93cx6.h>
  23 #include <net/mac80211.h>
  24
  25 #include "rtl8187.h"
  26 #include "rtl8187_rtl8225.h"
  27
  28 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
  29 MODULE_AUTHOR("Andrea Merello <andreamrl@tiscali.it>");
  30 MODULE_DESCRIPTION("RTL8187 USB wireless driver");
  31 MODULE_LICENSE("GPL");
  32
  33 static struct usb_device_id rtl8187_table[] __devinitdata = {
  34         /* Realtek */
  35         {USB_DEVICE(0x0bda, 0x8187)},
  36         /* Netgear */
  37         {USB_DEVICE(0x0846, 0x6100)},
  38         {USB_DEVICE(0x0846, 0x6a00)},
  39         /* HP */
  40         {USB_DEVICE(0x03f0, 0xca02)},
  41         /* Sitecom */
  42         {USB_DEVICE(0x0df6, 0x000d)},
  43         {}
  44 };
  45
  46 MODULE_DEVICE_TABLE(usb, rtl8187_table);
  47
  48 static void rtl8187_iowrite_async_cb(struct urb *urb)
  49 {
  50         kfree(urb->context);
  51         usb_free_urb(urb);
  52 }
  53
  54 static void rtl8187_iowrite_async(struct rtl8187_priv *priv, __le16 addr,
  55                                   void *data, u16 len)
  56 {
  57         struct usb_ctrlrequest *dr;
  58         struct urb *urb;
  59         struct rtl8187_async_write_data {
  60                 u8 data[4];
  61                 struct usb_ctrlrequest dr;
  62         } *buf;
  63
  64         buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
  65         if (!buf)
  66                 return;
  67
  68         urb = usb_alloc_urb(0, GFP_ATOMIC);
  69         if (!urb) {
  70                 kfree(buf);
  71                 return;
  72         }
  73
  74         dr = &buf->dr;
  75
  76         dr->bRequestType = RTL8187_REQT_WRITE;
  77         dr->bRequest = RTL8187_REQ_SET_REG;
  78         dr->wValue = addr;
  79         dr->wIndex = 0;
  80         dr->wLength = cpu_to_le16(len);
  81
  82         memcpy(buf, data, len);
  83
  84         usb_fill_control_urb(urb, priv->udev, usb_sndctrlpipe(priv->udev, 0),
  85                              (unsigned char *)dr, buf, len,
  86                              rtl8187_iowrite_async_cb, buf);
  87         usb_submit_urb(urb, GFP_ATOMIC);
  88 }
  89
  90 static inline void rtl818x_iowrite32_async(struct rtl8187_priv *priv,
  91                                            __le32 *addr, u32 val)
  92 {
  93         __le32 buf = cpu_to_le32(val);
  94
  95         rtl8187_iowrite_async(priv, cpu_to_le16((unsigned long)addr),
  96                               &buf, sizeof(buf));
  97 }
  98
  99 void rtl8187_write_phy(struct ieee80211_hw *dev, u8 addr, u32 data)
 100 {
 101         struct rtl8187_priv *priv = dev->priv;
 102
 103         data <<= 8;
 104         data |= addr | 0x80;
 105
 106         rtl818x_iowrite8(priv, &priv->map->PHY[3], (data >> 24) & 0xFF);
 107         rtl818x_iowrite8(priv, &priv->map->PHY[2], (data >> 16) & 0xFF);
 108         rtl818x_iowrite8(priv, &priv->map->PHY[1], (data >> 8) & 0xFF);
 109         rtl818x_iowrite8(priv, &priv->map->PHY[0], data & 0xFF);
 110
 111         msleep(1);
 112 }
 113
 114 static void rtl8187_tx_cb(struct urb *urb)
 115 {
 116         struct ieee80211_tx_status status = { {0} };
 117         struct sk_buff *skb = (struct sk_buff *)urb->context;
 118         struct rtl8187_tx_info *info = (struct rtl8187_tx_info *)skb->cb;
 119
 120         usb_free_urb(info->urb);
 121         if (info->control)
 122                 memcpy(&status.control, info->control, sizeof(status.control));
 123         kfree(info->control);
 124         skb_pull(skb, sizeof(struct rtl8187_tx_hdr));
 125         status.flags |= IEEE80211_TX_STATUS_ACK;
 126         ieee80211_tx_status_irqsafe(info->dev, skb, &status);
 127 }
 128
 129 static int rtl8187_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
 130                       struct ieee80211_tx_control *control)
 131 {
 132         struct rtl8187_priv *priv = dev->priv;
 133         struct rtl8187_tx_hdr *hdr;
 134         struct rtl8187_tx_info *info;
 135         struct urb *urb;
 136         __le16 rts_dur = 0;
 137         u32 flags;
 138
 139         urb = usb_alloc_urb(0, GFP_ATOMIC);
 140         if (!urb) {
 141                 kfree_skb(skb);
 142                 return 0;
 143         }
 144
 145         flags = skb->len;
 146         flags |= RTL8187_TX_FLAG_NO_ENCRYPT;
 147         flags |= control->rts_cts_rate << 19;
 148         flags |= control->tx_rate << 24;
 149         if (ieee80211_get_morefrag((struct ieee80211_hdr *)skb->data))
 150                 flags |= RTL8187_TX_FLAG_MORE_FRAG;
 151         if (control->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
 152                 flags |= RTL8187_TX_FLAG_RTS;
 153                 rts_dur = ieee80211_rts_duration(dev, priv->if_id, skb->len, control);
 154         }
 155         if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
 156                 flags |= RTL8187_TX_FLAG_CTS;
 157
 158         hdr = (struct rtl8187_tx_hdr *)skb_push(skb, sizeof(*hdr));
 159         hdr->flags = cpu_to_le32(flags);
 160         hdr->len = 0;
 161         hdr->rts_duration = rts_dur;
 162         hdr->retry = cpu_to_le32(control->retry_limit << 8);
 163
 164         info = (struct rtl8187_tx_info *)skb->cb;
 165         info->control = kmemdup(control, sizeof(*control), GFP_ATOMIC);
 166         info->urb = urb;
 167         info->dev = dev;
 168         usb_fill_bulk_urb(urb, priv->udev, usb_sndbulkpipe(priv->udev, 2),
 169                           hdr, skb->len, rtl8187_tx_cb, skb);
 170         usb_submit_urb(urb, GFP_ATOMIC);
 171
 172         return 0;
 173 }
 174
 175 static void rtl8187_rx_cb(struct urb *urb)
 176 {
 177         struct sk_buff *skb = (struct sk_buff *)urb->context;
 178         struct rtl8187_rx_info *info = (struct rtl8187_rx_info *)skb->cb;
 179         struct ieee80211_hw *dev = info->dev;
 180         struct rtl8187_priv *priv = dev->priv;
 181         struct rtl8187_rx_hdr *hdr;
 182         struct ieee80211_rx_status rx_status = { 0 };
 183         int rate, signal;
 184         u32 flags;
 185
 186         spin_lock(&priv->rx_queue.lock);
 187         if (skb->next)
 188                 __skb_unlink(skb, &priv->rx_queue);
 189         else {
 190                 spin_unlock(&priv->rx_queue.lock);
 191                 return;
 192         }
 193         spin_unlock(&priv->rx_queue.lock);
 194
 195         if (unlikely(urb->status)) {
 196                 usb_free_urb(urb);
 197                 dev_kfree_skb_irq(skb);
 198                 return;
 199         }
 200
 201         skb_put(skb, urb->actual_length);
 202         hdr = (struct rtl8187_rx_hdr *)(skb_tail_pointer(skb) - sizeof(*hdr));
 203         flags = le32_to_cpu(hdr->flags);
 204         skb_trim(skb, flags & 0x0FFF);
 205
 206         signal = hdr->agc >> 1;
 207         rate = (flags >> 20) & 0xF;
 208         if (rate > 3) { /* OFDM rate */
 209                 if (signal > 90)
 210                         signal = 90;
 211                 else if (signal < 25)
 212                         signal = 25;
 213                 signal = 90 - signal;
 214         } else {        /* CCK rate */
 215                 if (signal > 95)
 216                         signal = 95;
 217                 else if (signal < 30)
 218                         signal = 30;
 219                 signal = 95 - signal;
 220         }
 221
 222         rx_status.antenna = (hdr->signal >> 7) & 1;
 223         rx_status.signal = 64 - min(hdr->noise, (u8)64);
 224         rx_status.ssi = signal;
 225         rx_status.rate = rate;
 226         rx_status.freq = dev->conf.freq;
 227         rx_status.channel = dev->conf.channel;
 228         rx_status.phymode = dev->conf.phymode;
 229         rx_status.mactime = le64_to_cpu(hdr->mac_time);
 230         if (flags & (1 << 13))
 231                 rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
 232         ieee80211_rx_irqsafe(dev, skb, &rx_status);
 233
 234         skb = dev_alloc_skb(RTL8187_MAX_RX);
 235         if (unlikely(!skb)) {
 236                 usb_free_urb(urb);
 237                 /* TODO check rx queue length and refill *somewhere* */
 238                 return;
 239         }
 240
 241         info = (struct rtl8187_rx_info *)skb->cb;
 242         info->urb = urb;
 243         info->dev = dev;
 244         urb->transfer_buffer = skb_tail_pointer(skb);
 245         urb->context = skb;
 246         skb_queue_tail(&priv->rx_queue, skb);
 247
 248         usb_submit_urb(urb, GFP_ATOMIC);
 249 }
 250
 251 static int rtl8187_init_urbs(struct ieee80211_hw *dev)
 252 {
 253         struct rtl8187_priv *priv = dev->priv;
 254         struct urb *entry;
 255         struct sk_buff *skb;
 256         struct rtl8187_rx_info *info;
 257
 258         while (skb_queue_len(&priv->rx_queue) < 8) {
 259                 skb = __dev_alloc_skb(RTL8187_MAX_RX, GFP_KERNEL);
 260                 if (!skb)
 261                         break;
 262                 entry = usb_alloc_urb(0, GFP_KERNEL);
 263                 if (!entry) {
 264                         kfree_skb(skb);
 265                         break;
 266                 }
 267                 usb_fill_bulk_urb(entry, priv->udev,
 268                                   usb_rcvbulkpipe(priv->udev, 1),
 269                                   skb_tail_pointer(skb),
 270                                   RTL8187_MAX_RX, rtl8187_rx_cb, skb);
 271                 info = (struct rtl8187_rx_info *)skb->cb;
 272                 info->urb = entry;
 273                 info->dev = dev;
 274                 skb_queue_tail(&priv->rx_queue, skb);
 275                 usb_submit_urb(entry, GFP_KERNEL);
 276         }
 277
 278         return 0;
 279 }
 280
 281 static int rtl8187_init_hw(struct ieee80211_hw *dev)
 282 {
 283         struct rtl8187_priv *priv = dev->priv;
 284         u8 reg;
 285         int i;
 286
 287         /* reset */
 288         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
 289         reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
 290         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg | RTL818X_CONFIG3_ANAPARAM_WRITE);
 291         rtl818x_iowrite32(priv, &priv->map->ANAPARAM, RTL8225_ANAPARAM_ON);
 292         rtl818x_iowrite32(priv, &priv->map->ANAPARAM2, RTL8225_ANAPARAM2_ON);
 293         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);
 294         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
 295
 296         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);
 297
 298         msleep(200);
 299         rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x10);
 300         rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x11);
 301         rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x00);
 302         msleep(200);
 303
 304         reg = rtl818x_ioread8(priv, &priv->map->CMD);
 305         reg &= (1 << 1);
 306         reg |= RTL818X_CMD_RESET;
 307         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
 308
 309         i = 10;
 310         do {
 311                 msleep(2);
 312                 if (!(rtl818x_ioread8(priv, &priv->map->CMD) &
 313                       RTL818X_CMD_RESET))
 314                         break;
 315         } while (--i);
 316
 317         if (!i) {
 318                 printk(KERN_ERR "%s: Reset timeout!\n", wiphy_name(dev->wiphy));
 319                 return -ETIMEDOUT;
 320         }
 321
 322         /* reload registers from eeprom */
 323         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_LOAD);
 324
 325         i = 10;
 326         do {
 327                 msleep(4);
 328                 if (!(rtl818x_ioread8(priv, &priv->map->EEPROM_CMD) &
 329                       RTL818X_EEPROM_CMD_CONFIG))
 330                         break;
 331         } while (--i);
 332
 333         if (!i) {
 334                 printk(KERN_ERR "%s: eeprom reset timeout!\n",
 335                        wiphy_name(dev->wiphy));
 336                 return -ETIMEDOUT;
 337         }
 338
 339         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
 340         reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
 341         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg | RTL818X_CONFIG3_ANAPARAM_WRITE);
 342         rtl818x_iowrite32(priv, &priv->map->ANAPARAM, RTL8225_ANAPARAM_ON);
 343         rtl818x_iowrite32(priv, &priv->map->ANAPARAM2, RTL8225_ANAPARAM2_ON);
 344         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);
 345         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
 346
 347         /* setup card */
 348         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0);
 349         rtl818x_iowrite8(priv, &priv->map->GPIO, 0);
 350
 351         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, (4 << 8));
 352         rtl818x_iowrite8(priv, &priv->map->GPIO, 1);
 353         rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0);
 354
 355         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
 356
 357         rtl818x_iowrite16(priv, (__le16 *)0xFFF4, 0xFFFF);
 358         reg = rtl818x_ioread8(priv, &priv->map->CONFIG1);
 359         reg &= 0x3F;
 360         reg |= 0x80;
 361         rtl818x_iowrite8(priv, &priv->map->CONFIG1, reg);
 362
 363         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
 364
 365         rtl818x_iowrite32(priv, &priv->map->INT_TIMEOUT, 0);
 366         rtl818x_iowrite8(priv, &priv->map->WPA_CONF, 0);
 367         rtl818x_iowrite8(priv, &priv->map->RATE_FALLBACK, 0x81);
 368
 369         // TODO: set RESP_RATE and BRSR properly
 370         rtl818x_iowrite8(priv, &priv->map->RESP_RATE, (8 << 4) | 0);
 371         rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);
 372
 373         /* host_usb_init */
 374         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0);
 375         rtl818x_iowrite8(priv, &priv->map->GPIO, 0);
 376         reg = rtl818x_ioread8(priv, (u8 *)0xFE53);
 377         rtl818x_iowrite8(priv, (u8 *)0xFE53, reg | (1 << 7));
 378         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, (4 << 8));
 379         rtl818x_iowrite8(priv, &priv->map->GPIO, 0x20);
 380         rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0);
 381         rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, 0x80);
 382         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0x80);
 383         rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, 0x80);
 384         msleep(100);
 385
 386         rtl818x_iowrite32(priv, &priv->map->RF_TIMING, 0x000a8008);
 387         rtl818x_iowrite16(priv, &priv->map->BRSR, 0xFFFF);
 388         rtl818x_iowrite32(priv, &priv->map->RF_PARA, 0x00100044);
 389         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
 390         rtl818x_iowrite8(priv, &priv->map->CONFIG3, 0x44);
 391         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
 392         rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, 0x1FF7);
 393         msleep(100);
 394
 395         priv->rf_init(dev);
 396
 397         rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);
 398         reg = rtl818x_ioread16(priv, &priv->map->PGSELECT) & 0xfffe;
 399         rtl818x_iowrite16(priv, &priv->map->PGSELECT, reg | 0x1);
 400         rtl818x_iowrite16(priv, (__le16 *)0xFFFE, 0x10);
 401         rtl818x_iowrite8(priv, &priv->map->TALLY_SEL, 0x80);
 402         rtl818x_iowrite8(priv, (u8 *)0xFFFF, 0x60);
 403         rtl818x_iowrite16(priv, &priv->map->PGSELECT, reg);
 404
 405         return 0;
 406 }
 407
 408 static void rtl8187_set_channel(struct ieee80211_hw *dev, int channel)
 409 {
 410         u32 reg;
 411         struct rtl8187_priv *priv = dev->priv;
 412
 413         reg = rtl818x_ioread32(priv, &priv->map->TX_CONF);
 414         /* Enable TX loopback on MAC level to avoid TX during channel
 415          * changes, as this has be seen to causes problems and the
 416          * card will stop work until next reset
 417          */
 418         rtl818x_iowrite32(priv, &priv->map->TX_CONF,
 419                           reg | RTL818X_TX_CONF_LOOPBACK_MAC);
 420         msleep(10);
 421         rtl8225_rf_set_channel(dev, channel);
 422         msleep(10);
 423         rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);
 424 }
 425
 426 static int rtl8187_start(struct ieee80211_hw *dev)
 427 {
 428         struct rtl8187_priv *priv = dev->priv;
 429         u32 reg;
 430         int ret;
 431
 432         ret = rtl8187_init_hw(dev);
 433         if (ret)
 434                 return ret;
 435
 436         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0xFFFF);
 437
 438         rtl818x_iowrite32(priv, &priv->map->MAR[0], ~0);
 439         rtl818x_iowrite32(priv, &priv->map->MAR[1], ~0);
 440
 441         rtl8187_init_urbs(dev);
 442
 443         reg = RTL818X_RX_CONF_ONLYERLPKT |
 444               RTL818X_RX_CONF_RX_AUTORESETPHY |
 445               RTL818X_RX_CONF_BSSID |
 446               RTL818X_RX_CONF_MGMT |
 447               RTL818X_RX_CONF_DATA |
 448               (7 << 13 /* RX FIFO threshold NONE */) |
 449               (7 << 10 /* MAX RX DMA */) |
 450               RTL818X_RX_CONF_BROADCAST |
 451               RTL818X_RX_CONF_NICMAC;
 452
 453         priv->rx_conf = reg;
 454         rtl818x_iowrite32(priv, &priv->map->RX_CONF, reg);
 455
 456         reg = rtl818x_ioread8(priv, &priv->map->CW_CONF);
 457         reg &= ~RTL818X_CW_CONF_PERPACKET_CW_SHIFT;
 458         reg |= RTL818X_CW_CONF_PERPACKET_RETRY_SHIFT;
 459         rtl818x_iowrite8(priv, &priv->map->CW_CONF, reg);
 460
 461         reg = rtl818x_ioread8(priv, &priv->map->TX_AGC_CTL);
 462         reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_GAIN_SHIFT;
 463         reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_ANTSEL_SHIFT;
 464         reg &= ~RTL818X_TX_AGC_CTL_FEEDBACK_ANT;
 465         rtl818x_iowrite8(priv, &priv->map->TX_AGC_CTL, reg);
 466
 467         reg  = RTL818X_TX_CONF_CW_MIN |
 468                (7 << 21 /* MAX TX DMA */) |
 469                RTL818X_TX_CONF_NO_ICV;
 470         rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);
 471
 472         reg = rtl818x_ioread8(priv, &priv->map->CMD);
 473         reg |= RTL818X_CMD_TX_ENABLE;
 474         reg |= RTL818X_CMD_RX_ENABLE;
 475         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
 476
 477         return 0;
 478 }
 479
 480 static void rtl8187_stop(struct ieee80211_hw *dev)
 481 {
 482         struct rtl8187_priv *priv = dev->priv;
 483         struct rtl8187_rx_info *info;
 484         struct sk_buff *skb;
 485         u32 reg;
 486
 487         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);
 488
 489         reg = rtl818x_ioread8(priv, &priv->map->CMD);
 490         reg &= ~RTL818X_CMD_TX_ENABLE;
 491         reg &= ~RTL818X_CMD_RX_ENABLE;
 492         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
 493
 494         rtl8225_rf_stop(dev);
 495
 496         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
 497         reg = rtl818x_ioread8(priv, &priv->map->CONFIG4);
 498         rtl818x_iowrite8(priv, &priv->map->CONFIG4, reg | RTL818X_CONFIG4_VCOOFF);
 499         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
 500
 501         while ((skb = skb_dequeue(&priv->rx_queue))) {
 502                 info = (struct rtl8187_rx_info *)skb->cb;
 503                 usb_kill_urb(info->urb);
 504                 kfree_skb(skb);
 505         }
 506         return;
 507 }
 508
 509 static int rtl8187_add_interface(struct ieee80211_hw *dev,
 510                                  struct ieee80211_if_init_conf *conf)
 511 {
 512         struct rtl8187_priv *priv = dev->priv;
 513         int i;
 514
 515         if (priv->mode != IEEE80211_IF_TYPE_MNTR)
 516                 return -EOPNOTSUPP;
 517
 518         switch (conf->type) {
 519         case IEEE80211_IF_TYPE_STA:
 520                 priv->mode = conf->type;
 521                 break;
 522         default:
 523                 return -EOPNOTSUPP;
 524         }
 525
 526         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
 527         for (i = 0; i < ETH_ALEN; i++)
 528                 rtl818x_iowrite8(priv, &priv->map->MAC[i],
 529                                  ((u8 *)conf->mac_addr)[i]);
 530         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
 531
 532         return 0;
 533 }
 534
 535 static void rtl8187_remove_interface(struct ieee80211_hw *dev,
 536                                      struct ieee80211_if_init_conf *conf)
 537 {
 538         struct rtl8187_priv *priv = dev->priv;
 539         priv->mode = IEEE80211_IF_TYPE_MNTR;
 540 }
 541
 542 static int rtl8187_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
 543 {
 544         struct rtl8187_priv *priv = dev->priv;
 545         rtl8187_set_channel(dev, conf->channel);
 546
 547         rtl818x_iowrite8(priv, &priv->map->SIFS, 0x22);
 548
 549         if (conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME) {
 550                 rtl818x_iowrite8(priv, &priv->map->SLOT, 0x9);
 551                 rtl818x_iowrite8(priv, &priv->map->DIFS, 0x14);
 552                 rtl818x_iowrite8(priv, &priv->map->EIFS, 91 - 0x14);
 553                 rtl818x_iowrite8(priv, &priv->map->CW_VAL, 0x73);
 554         } else {
 555                 rtl818x_iowrite8(priv, &priv->map->SLOT, 0x14);
 556                 rtl818x_iowrite8(priv, &priv->map->DIFS, 0x24);
 557                 rtl818x_iowrite8(priv, &priv->map->EIFS, 91 - 0x24);
 558                 rtl818x_iowrite8(priv, &priv->map->CW_VAL, 0xa5);
 559         }
 560
 561         rtl818x_iowrite16(priv, &priv->map->ATIM_WND, 2);
 562         rtl818x_iowrite16(priv, &priv->map->ATIMTR_INTERVAL, 100);
 563         rtl818x_iowrite16(priv, &priv->map->BEACON_INTERVAL, 100);
 564         rtl818x_iowrite16(priv, &priv->map->BEACON_INTERVAL_TIME, 100);
 565         return 0;
 566 }
 567
 568 static int rtl8187_config_interface(struct ieee80211_hw *dev, int if_id,
 569                                     struct ieee80211_if_conf *conf)
 570 {
 571         struct rtl8187_priv *priv = dev->priv;
 572         int i;
 573
 574         priv->if_id = if_id;
 575
 576         for (i = 0; i < ETH_ALEN; i++)
 577                 rtl818x_iowrite8(priv, &priv->map->BSSID[i], conf->bssid[i]);
 578
 579         if (is_valid_ether_addr(conf->bssid))
 580                 rtl818x_iowrite8(priv, &priv->map->MSR, RTL818X_MSR_INFRA);
 581         else
 582                 rtl818x_iowrite8(priv, &priv->map->MSR, RTL818X_MSR_NO_LINK);
 583
 584         return 0;
 585 }
 586
 587 static void rtl8187_configure_filter(struct ieee80211_hw *dev,
 588                                      unsigned int changed_flags,
 589                                      unsigned int *total_flags,
 590                                      int mc_count, struct dev_addr_list *mclist)
 591 {
 592         struct rtl8187_priv *priv = dev->priv;
 593
 594         if (changed_flags & FIF_FCSFAIL)
 595                 priv->rx_conf ^= RTL818X_RX_CONF_FCS;
 596         if (changed_flags & FIF_CONTROL)
 597                 priv->rx_conf ^= RTL818X_RX_CONF_CTRL;
 598         if (changed_flags & FIF_OTHER_BSS)
 599                 priv->rx_conf ^= RTL818X_RX_CONF_MONITOR;
 600         if (*total_flags & FIF_ALLMULTI || mc_count > 0)
 601                 priv->rx_conf |= RTL818X_RX_CONF_MULTICAST;
 602         else
 603                 priv->rx_conf &= ~RTL818X_RX_CONF_MULTICAST;
 604
 605         *total_flags = 0;
 606
 607         if (priv->rx_conf & RTL818X_RX_CONF_FCS)
 608                 *total_flags |= FIF_FCSFAIL;
 609         if (priv->rx_conf & RTL818X_RX_CONF_CTRL)
 610                 *total_flags |= FIF_CONTROL;
 611         if (priv->rx_conf & RTL818X_RX_CONF_MONITOR)
 612                 *total_flags |= FIF_OTHER_BSS;
 613         if (priv->rx_conf & RTL818X_RX_CONF_MULTICAST)
 614                 *total_flags |= FIF_ALLMULTI;
 615
 616         rtl818x_iowrite32_async(priv, &priv->map->RX_CONF, priv->rx_conf);
 617 }
 618
 619 static const struct ieee80211_ops rtl8187_ops = {
 620         .tx                     = rtl8187_tx,
 621         .start                  = rtl8187_start,
 622         .stop                   = rtl8187_stop,
 623         .add_interface          = rtl8187_add_interface,
 624         .remove_interface       = rtl8187_remove_interface,
 625         .config                 = rtl8187_config,
 626         .config_interface       = rtl8187_config_interface,
 627         .configure_filter       = rtl8187_configure_filter,
 628 };
 629
 630 static void rtl8187_eeprom_register_read(struct eeprom_93cx6 *eeprom)
 631 {
 632         struct ieee80211_hw *dev = eeprom->data;
 633         struct rtl8187_priv *priv = dev->priv;
 634         u8 reg = rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);
 635
 636         eeprom->reg_data_in = reg & RTL818X_EEPROM_CMD_WRITE;
 637         eeprom->reg_data_out = reg & RTL818X_EEPROM_CMD_READ;
 638         eeprom->reg_data_clock = reg & RTL818X_EEPROM_CMD_CK;
 639         eeprom->reg_chip_select = reg & RTL818X_EEPROM_CMD_CS;
 640 }
 641
 642 static void rtl8187_eeprom_register_write(struct eeprom_93cx6 *eeprom)
 643 {
 644         struct ieee80211_hw *dev = eeprom->data;
 645         struct rtl8187_priv *priv = dev->priv;
 646         u8 reg = RTL818X_EEPROM_CMD_PROGRAM;
 647
 648         if (eeprom->reg_data_in)
 649                 reg |= RTL818X_EEPROM_CMD_WRITE;
 650         if (eeprom->reg_data_out)
 651                 reg |= RTL818X_EEPROM_CMD_READ;
 652         if (eeprom->reg_data_clock)
 653                 reg |= RTL818X_EEPROM_CMD_CK;
 654         if (eeprom->reg_chip_select)
 655                 reg |= RTL818X_EEPROM_CMD_CS;
 656
 657         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, reg);
 658         udelay(10);
 659 }
 660
 661 static int __devinit rtl8187_probe(struct usb_interface *intf,
 662                                    const struct usb_device_id *id)
 663 {
 664         struct usb_device *udev = interface_to_usbdev(intf);
 665         struct ieee80211_hw *dev;
 666         struct rtl8187_priv *priv;
 667         struct eeprom_93cx6 eeprom;
 668         struct ieee80211_channel *channel;
 669         u16 txpwr, reg;
 670         int err, i;
 671         DECLARE_MAC_BUF(mac);
 672
 673         dev = ieee80211_alloc_hw(sizeof(*priv), &rtl8187_ops);
 674         if (!dev) {
 675                 printk(KERN_ERR "rtl8187: ieee80211 alloc failed\n");
 676                 return -ENOMEM;
 677         }
 678
 679         priv = dev->priv;
 680
 681         SET_IEEE80211_DEV(dev, &intf->dev);
 682         usb_set_intfdata(intf, dev);
 683         priv->udev = udev;
 684
 685         usb_get_dev(udev);
 686
 687         skb_queue_head_init(&priv->rx_queue);
 688         memcpy(priv->channels, rtl818x_channels, sizeof(rtl818x_channels));
 689         memcpy(priv->rates, rtl818x_rates, sizeof(rtl818x_rates));
 690         priv->map = (struct rtl818x_csr *)0xFF00;
 691         priv->modes[0].mode = MODE_IEEE80211G;
 692         priv->modes[0].num_rates = ARRAY_SIZE(rtl818x_rates);
 693         priv->modes[0].rates = priv->rates;
 694         priv->modes[0].num_channels = ARRAY_SIZE(rtl818x_channels);
 695         priv->modes[0].channels = priv->channels;
 696         priv->modes[1].mode = MODE_IEEE80211B;
 697         priv->modes[1].num_rates = 4;
 698         priv->modes[1].rates = priv->rates;
 699         priv->modes[1].num_channels = ARRAY_SIZE(rtl818x_channels);
 700         priv->modes[1].channels = priv->channels;
 701         priv->mode = IEEE80211_IF_TYPE_MNTR;
 702         dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
 703                      IEEE80211_HW_RX_INCLUDES_FCS;
 704         dev->extra_tx_headroom = sizeof(struct rtl8187_tx_hdr);
 705         dev->queues = 1;
 706         dev->max_rssi = 65;
 707         dev->max_signal = 64;
 708
 709         for (i = 0; i < 2; i++)
 710                 if ((err = ieee80211_register_hwmode(dev, &priv->modes[i])))
 711                         goto err_free_dev;
 712
 713         eeprom.data = dev;
 714         eeprom.register_read = rtl8187_eeprom_register_read;
 715         eeprom.register_write = rtl8187_eeprom_register_write;
 716         if (rtl818x_ioread32(priv, &priv->map->RX_CONF) & (1 << 6))
 717                 eeprom.width = PCI_EEPROM_WIDTH_93C66;
 718         else
 719                 eeprom.width = PCI_EEPROM_WIDTH_93C46;
 720
 721         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
 722         udelay(10);
 723
 724         eeprom_93cx6_multiread(&eeprom, RTL8187_EEPROM_MAC_ADDR,
 725                                (__le16 __force *)dev->wiphy->perm_addr, 3);
 726         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
 727                 printk(KERN_WARNING "rtl8187: Invalid hwaddr! Using randomly "
 728                        "generated MAC address\n");
 729                 random_ether_addr(dev->wiphy->perm_addr);
 730         }
 731
 732         channel = priv->channels;
 733         for (i = 0; i < 3; i++) {
 734                 eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_1 + i,
 735                                   &txpwr);
 736                 (*channel++).val = txpwr & 0xFF;
 737                 (*channel++).val = txpwr >> 8;
 738         }
 739         for (i = 0; i < 2; i++) {
 740                 eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_4 + i,
 741                                   &txpwr);
 742                 (*channel++).val = txpwr & 0xFF;
 743                 (*channel++).val = txpwr >> 8;
 744         }
 745         for (i = 0; i < 2; i++) {
 746                 eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_6 + i,
 747                                   &txpwr);
 748                 (*channel++).val = txpwr & 0xFF;
 749                 (*channel++).val = txpwr >> 8;
 750         }
 751
 752         eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_BASE,
 753                           &priv->txpwr_base);
 754
 755         reg = rtl818x_ioread16(priv, &priv->map->PGSELECT) & ~1;
 756         rtl818x_iowrite16(priv, &priv->map->PGSELECT, reg | 1);
 757         /* 0 means asic B-cut, we should use SW 3 wire
 758          * bit-by-bit banging for radio. 1 means we can use
 759          * USB specific request to write radio registers */
 760         priv->asic_rev = rtl818x_ioread8(priv, (u8 *)0xFFFE) & 0x3;
 761         rtl818x_iowrite16(priv, &priv->map->PGSELECT, reg);
 762         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
 763
 764         rtl8225_write(dev, 0, 0x1B7);
 765
 766         if (rtl8225_read(dev, 8) != 0x588 || rtl8225_read(dev, 9) != 0x700)
 767                 priv->rf_init = rtl8225_rf_init;
 768         else
 769                 priv->rf_init = rtl8225z2_rf_init;
 770
 771         rtl8225_write(dev, 0, 0x0B7);
 772
 773         err = ieee80211_register_hw(dev);
 774         if (err) {
 775                 printk(KERN_ERR "rtl8187: Cannot register device\n");
 776                 goto err_free_dev;
 777         }
 778
 779         printk(KERN_INFO "%s: hwaddr %s, rtl8187 V%d + %s\n",
 780                wiphy_name(dev->wiphy), print_mac(mac, dev->wiphy->perm_addr),
 781                priv->asic_rev, priv->rf_init == rtl8225_rf_init ?
 782                "rtl8225" : "rtl8225z2");
 783
 784         return 0;
 785
 786  err_free_dev:
 787         ieee80211_free_hw(dev);
 788         usb_set_intfdata(intf, NULL);
 789         usb_put_dev(udev);
 790         return err;
 791 }
 792
 793 static void __devexit rtl8187_disconnect(struct usb_interface *intf)
 794 {
 795         struct ieee80211_hw *dev = usb_get_intfdata(intf);
 796         struct rtl8187_priv *priv;
 797
 798         if (!dev)
 799                 return;
 800
 801         ieee80211_unregister_hw(dev);
 802
 803         priv = dev->priv;
 804         usb_put_dev(interface_to_usbdev(intf));
 805         ieee80211_free_hw(dev);
 806 }
 807
 808 static struct usb_driver rtl8187_driver = {
 809         .name           = KBUILD_MODNAME,
 810         .id_table       = rtl8187_table,
 811         .probe          = rtl8187_probe,
 812         .disconnect     = rtl8187_disconnect,
 813 };
 814
 815 static int __init rtl8187_init(void)
 816 {
 817         return usb_register(&rtl8187_driver);
 818 }
 819
 820 static void __exit rtl8187_exit(void)
 821 {
 822         usb_deregister(&rtl8187_driver);
 823 }
 824
 825 module_init(rtl8187_init);
 826 module_exit(rtl8187_exit);