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rtl8187_dev.c

/*
 * Linux device driver for RTL8187
 *
 * Copyright 2007 Michael Wu <flamingice@sourmilk.net>
 * Copyright 2007 Andrea Merello <andreamrl@tiscali.it>
 *
 * Based on the r8187 driver, which is:
 * Copyright 2005 Andrea Merello <andreamrl@tiscali.it>, et al.
 *
 * Magic delays and register offsets below are taken from the original
 * r8187 driver sources.  Thanks to Realtek for their support!
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/init.h>
#include <linux/usb.h>
#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/eeprom_93cx6.h>
#include <net/mac80211.h>

#include "rtl8187.h"
#include "rtl8187_rtl8225.h"

MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
MODULE_AUTHOR("Andrea Merello <andreamrl@tiscali.it>");
MODULE_DESCRIPTION("RTL8187 USB wireless driver");
MODULE_LICENSE("GPL");

static struct usb_device_id rtl8187_table[] __devinitdata = {
      /* Realtek */
      {USB_DEVICE(0x0bda, 0x8187)},
      /* Netgear */
      {USB_DEVICE(0x0846, 0x6100)},
      {USB_DEVICE(0x0846, 0x6a00)},
      /* HP */
      {USB_DEVICE(0x03f0, 0xca02)},
      /* Sitecom */
      {USB_DEVICE(0x0df6, 0x000d)},
      {}
};

MODULE_DEVICE_TABLE(usb, rtl8187_table);

static void rtl8187_iowrite_async_cb(struct urb *urb)
{
      kfree(urb->context);
      usb_free_urb(urb);
}

static void rtl8187_iowrite_async(struct rtl8187_priv *priv, __le16 addr,
                          void *data, u16 len)
{
      struct usb_ctrlrequest *dr;
      struct urb *urb;
      struct rtl8187_async_write_data {
            u8 data[4];
            struct usb_ctrlrequest dr;
      } *buf;

      buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
      if (!buf)
            return;

      urb = usb_alloc_urb(0, GFP_ATOMIC);
      if (!urb) {
            kfree(buf);
            return;
      }

      dr = &buf->dr;

      dr->bRequestType = RTL8187_REQT_WRITE;
      dr->bRequest = RTL8187_REQ_SET_REG;
      dr->wValue = addr;
      dr->wIndex = 0;
      dr->wLength = cpu_to_le16(len);

      memcpy(buf, data, len);

      usb_fill_control_urb(urb, priv->udev, usb_sndctrlpipe(priv->udev, 0),
                       (unsigned char *)dr, buf, len,
                       rtl8187_iowrite_async_cb, buf);
      usb_submit_urb(urb, GFP_ATOMIC);
}

static inline void rtl818x_iowrite32_async(struct rtl8187_priv *priv,
                                 __le32 *addr, u32 val)
{
      __le32 buf = cpu_to_le32(val);

      rtl8187_iowrite_async(priv, cpu_to_le16((unsigned long)addr),
                        &buf, sizeof(buf));
}

void rtl8187_write_phy(struct ieee80211_hw *dev, u8 addr, u32 data)
{
      struct rtl8187_priv *priv = dev->priv;

      data <<= 8;
      data |= addr | 0x80;

      rtl818x_iowrite8(priv, &priv->map->PHY[3], (data >> 24) & 0xFF);
      rtl818x_iowrite8(priv, &priv->map->PHY[2], (data >> 16) & 0xFF);
      rtl818x_iowrite8(priv, &priv->map->PHY[1], (data >> 8) & 0xFF);
      rtl818x_iowrite8(priv, &priv->map->PHY[0], data & 0xFF);

      msleep(1);
}

static void rtl8187_tx_cb(struct urb *urb)
{
      struct ieee80211_tx_status status = { {0} };
      struct sk_buff *skb = (struct sk_buff *)urb->context;
      struct rtl8187_tx_info *info = (struct rtl8187_tx_info *)skb->cb;

      usb_free_urb(info->urb);
      if (info->control)
            memcpy(&status.control, info->control, sizeof(status.control));
      kfree(info->control);
      skb_pull(skb, sizeof(struct rtl8187_tx_hdr));
      status.flags |= IEEE80211_TX_STATUS_ACK;
      ieee80211_tx_status_irqsafe(info->dev, skb, &status);
}

static int rtl8187_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
                  struct ieee80211_tx_control *control)
{
      struct rtl8187_priv *priv = dev->priv;
      struct rtl8187_tx_hdr *hdr;
      struct rtl8187_tx_info *info;
      struct urb *urb;
      __le16 rts_dur = 0;
      u32 flags;

      urb = usb_alloc_urb(0, GFP_ATOMIC);
      if (!urb) {
            kfree_skb(skb);
            return 0;
      }

      flags = skb->len;
      flags |= RTL8187_TX_FLAG_NO_ENCRYPT;
      flags |= control->rts_cts_rate << 19;
      flags |= control->tx_rate << 24;
      if (ieee80211_get_morefrag((struct ieee80211_hdr *)skb->data))
            flags |= RTL8187_TX_FLAG_MORE_FRAG;
      if (control->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
            flags |= RTL8187_TX_FLAG_RTS;
            rts_dur = ieee80211_rts_duration(dev, priv->if_id, skb->len, control);
      }
      if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
            flags |= RTL8187_TX_FLAG_CTS;

      hdr = (struct rtl8187_tx_hdr *)skb_push(skb, sizeof(*hdr));
      hdr->flags = cpu_to_le32(flags);
      hdr->len = 0;
      hdr->rts_duration = rts_dur;
      hdr->retry = cpu_to_le32(control->retry_limit << 8);

      info = (struct rtl8187_tx_info *)skb->cb;
      info->control = kmemdup(control, sizeof(*control), GFP_ATOMIC);
      info->urb = urb;
      info->dev = dev;
      usb_fill_bulk_urb(urb, priv->udev, usb_sndbulkpipe(priv->udev, 2),
                    hdr, skb->len, rtl8187_tx_cb, skb);
      usb_submit_urb(urb, GFP_ATOMIC);

      return 0;
}

static void rtl8187_rx_cb(struct urb *urb)
{
      struct sk_buff *skb = (struct sk_buff *)urb->context;
      struct rtl8187_rx_info *info = (struct rtl8187_rx_info *)skb->cb;
      struct ieee80211_hw *dev = info->dev;
      struct rtl8187_priv *priv = dev->priv;
      struct rtl8187_rx_hdr *hdr;
      struct ieee80211_rx_status rx_status = { 0 };
      int rate, signal;
      u32 flags;

      spin_lock(&priv->rx_queue.lock);
      if (skb->next)
            __skb_unlink(skb, &priv->rx_queue);
      else {
            spin_unlock(&priv->rx_queue.lock);
            return;
      }
      spin_unlock(&priv->rx_queue.lock);

      if (unlikely(urb->status)) {
            usb_free_urb(urb);
            dev_kfree_skb_irq(skb);
            return;
      }

      skb_put(skb, urb->actual_length);
      hdr = (struct rtl8187_rx_hdr *)(skb_tail_pointer(skb) - sizeof(*hdr));
      flags = le32_to_cpu(hdr->flags);
      skb_trim(skb, flags & 0x0FFF);

      signal = hdr->agc >> 1;
      rate = (flags >> 20) & 0xF;
      if (rate > 3) {   /* OFDM rate */
            if (signal > 90)
                  signal = 90;
            else if (signal < 25)
                  signal = 25;
            signal = 90 - signal;
      } else {    /* CCK rate */
            if (signal > 95)
                  signal = 95;
            else if (signal < 30)
                  signal = 30;
            signal = 95 - signal;
      }

      rx_status.antenna = (hdr->signal >> 7) & 1;
      rx_status.signal = 64 - min(hdr->noise, (u8)64);
      rx_status.ssi = signal;
      rx_status.rate = rate;
      rx_status.freq = dev->conf.freq;
      rx_status.channel = dev->conf.channel;
      rx_status.phymode = dev->conf.phymode;
      rx_status.mactime = le64_to_cpu(hdr->mac_time);
      if (flags & (1 << 13))
            rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
      ieee80211_rx_irqsafe(dev, skb, &rx_status);

      skb = dev_alloc_skb(RTL8187_MAX_RX);
      if (unlikely(!skb)) {
            usb_free_urb(urb);
            /* TODO check rx queue length and refill *somewhere* */
            return;
      }

      info = (struct rtl8187_rx_info *)skb->cb;
      info->urb = urb;
      info->dev = dev;
      urb->transfer_buffer = skb_tail_pointer(skb);
      urb->context = skb;
      skb_queue_tail(&priv->rx_queue, skb);

      usb_submit_urb(urb, GFP_ATOMIC);
}

static int rtl8187_init_urbs(struct ieee80211_hw *dev)
{
      struct rtl8187_priv *priv = dev->priv;
      struct urb *entry;
      struct sk_buff *skb;
      struct rtl8187_rx_info *info;

      while (skb_queue_len(&priv->rx_queue) < 8) {
            skb = __dev_alloc_skb(RTL8187_MAX_RX, GFP_KERNEL);
            if (!skb)
                  break;
            entry = usb_alloc_urb(0, GFP_KERNEL);
            if (!entry) {
                  kfree_skb(skb);
                  break;
            }
            usb_fill_bulk_urb(entry, priv->udev,
                          usb_rcvbulkpipe(priv->udev, 1),
                          skb_tail_pointer(skb),
                          RTL8187_MAX_RX, rtl8187_rx_cb, skb);
            info = (struct rtl8187_rx_info *)skb->cb;
            info->urb = entry;
            info->dev = dev;
            skb_queue_tail(&priv->rx_queue, skb);
            usb_submit_urb(entry, GFP_KERNEL);
      }

      return 0;
}

static int rtl8187_init_hw(struct ieee80211_hw *dev)
{
      struct rtl8187_priv *priv = dev->priv;
      u8 reg;
      int i;

      /* reset */
      rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
      reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
      rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg | RTL818X_CONFIG3_ANAPARAM_WRITE);
      rtl818x_iowrite32(priv, &priv->map->ANAPARAM, RTL8225_ANAPARAM_ON);
      rtl818x_iowrite32(priv, &priv->map->ANAPARAM2, RTL8225_ANAPARAM2_ON);
      rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);
      rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);

      rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);

      msleep(200);
      rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x10);
      rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x11);
      rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x00);
      msleep(200);

      reg = rtl818x_ioread8(priv, &priv->map->CMD);
      reg &= (1 << 1);
      reg |= RTL818X_CMD_RESET;
      rtl818x_iowrite8(priv, &priv->map->CMD, reg);

      i = 10;
      do {
            msleep(2);
            if (!(rtl818x_ioread8(priv, &priv->map->CMD) &
                  RTL818X_CMD_RESET))
                  break;
      } while (--i);

      if (!i) {
            printk(KERN_ERR "%s: Reset timeout!\n", wiphy_name(dev->wiphy));
            return -ETIMEDOUT;
      }

      /* reload registers from eeprom */
      rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_LOAD);

      i = 10;
      do {
            msleep(4);
            if (!(rtl818x_ioread8(priv, &priv->map->EEPROM_CMD) &
                  RTL818X_EEPROM_CMD_CONFIG))
                  break;
      } while (--i);

      if (!i) {
            printk(KERN_ERR "%s: eeprom reset timeout!\n",
                   wiphy_name(dev->wiphy));
            return -ETIMEDOUT;
      }

      rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
      reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
      rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg | RTL818X_CONFIG3_ANAPARAM_WRITE);
      rtl818x_iowrite32(priv, &priv->map->ANAPARAM, RTL8225_ANAPARAM_ON);
      rtl818x_iowrite32(priv, &priv->map->ANAPARAM2, RTL8225_ANAPARAM2_ON);
      rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);
      rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);

      /* setup card */
      rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0);
      rtl818x_iowrite8(priv, &priv->map->GPIO, 0);

      rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, (4 << 8));
      rtl818x_iowrite8(priv, &priv->map->GPIO, 1);
      rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0);

      rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);

      rtl818x_iowrite16(priv, (__le16 *)0xFFF4, 0xFFFF);
      reg = rtl818x_ioread8(priv, &priv->map->CONFIG1);
      reg &= 0x3F;
      reg |= 0x80;
      rtl818x_iowrite8(priv, &priv->map->CONFIG1, reg);

      rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);

      rtl818x_iowrite32(priv, &priv->map->INT_TIMEOUT, 0);
      rtl818x_iowrite8(priv, &priv->map->WPA_CONF, 0);
      rtl818x_iowrite8(priv, &priv->map->RATE_FALLBACK, 0x81);

      // TODO: set RESP_RATE and BRSR properly
      rtl818x_iowrite8(priv, &priv->map->RESP_RATE, (8 << 4) | 0);
      rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);

      /* host_usb_init */
      rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0);
      rtl818x_iowrite8(priv, &priv->map->GPIO, 0);
      reg = rtl818x_ioread8(priv, (u8 *)0xFE53);
      rtl818x_iowrite8(priv, (u8 *)0xFE53, reg | (1 << 7));
      rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, (4 << 8));
      rtl818x_iowrite8(priv, &priv->map->GPIO, 0x20);
      rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0);
      rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, 0x80);
      rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0x80);
      rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, 0x80);
      msleep(100);

      rtl818x_iowrite32(priv, &priv->map->RF_TIMING, 0x000a8008);
      rtl818x_iowrite16(priv, &priv->map->BRSR, 0xFFFF);
      rtl818x_iowrite32(priv, &priv->map->RF_PARA, 0x00100044);
      rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
      rtl818x_iowrite8(priv, &priv->map->CONFIG3, 0x44);
      rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
      rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, 0x1FF7);
      msleep(100);

      priv->rf_init(dev);

      rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);
      reg = rtl818x_ioread16(priv, &priv->map->PGSELECT) & 0xfffe;
      rtl818x_iowrite16(priv, &priv->map->PGSELECT, reg | 0x1);
      rtl818x_iowrite16(priv, (__le16 *)0xFFFE, 0x10);
      rtl818x_iowrite8(priv, &priv->map->TALLY_SEL, 0x80);
      rtl818x_iowrite8(priv, (u8 *)0xFFFF, 0x60);
      rtl818x_iowrite16(priv, &priv->map->PGSELECT, reg);

      return 0;
}

static void rtl8187_set_channel(struct ieee80211_hw *dev, int channel)
{
      u32 reg;
      struct rtl8187_priv *priv = dev->priv;

      reg = rtl818x_ioread32(priv, &priv->map->TX_CONF);
      /* Enable TX loopback on MAC level to avoid TX during channel
       * changes, as this has be seen to causes problems and the
       * card will stop work until next reset
       */
      rtl818x_iowrite32(priv, &priv->map->TX_CONF,
                    reg | RTL818X_TX_CONF_LOOPBACK_MAC);
      msleep(10);
      rtl8225_rf_set_channel(dev, channel);
      msleep(10);
      rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);
}

static int rtl8187_start(struct ieee80211_hw *dev)
{
      struct rtl8187_priv *priv = dev->priv;
      u32 reg;
      int ret;

      ret = rtl8187_init_hw(dev);
      if (ret)
            return ret;

      rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0xFFFF);

      rtl818x_iowrite32(priv, &priv->map->MAR[0], ~0);
      rtl818x_iowrite32(priv, &priv->map->MAR[1], ~0);

      rtl8187_init_urbs(dev);

      reg = RTL818X_RX_CONF_ONLYERLPKT |
            RTL818X_RX_CONF_RX_AUTORESETPHY |
            RTL818X_RX_CONF_BSSID |
            RTL818X_RX_CONF_MGMT |
            RTL818X_RX_CONF_DATA |
            (7 << 13 /* RX FIFO threshold NONE */) |
            (7 << 10 /* MAX RX DMA */) |
            RTL818X_RX_CONF_BROADCAST |
            RTL818X_RX_CONF_NICMAC;

      priv->rx_conf = reg;
      rtl818x_iowrite32(priv, &priv->map->RX_CONF, reg);

      reg = rtl818x_ioread8(priv, &priv->map->CW_CONF);
      reg &= ~RTL818X_CW_CONF_PERPACKET_CW_SHIFT;
      reg |= RTL818X_CW_CONF_PERPACKET_RETRY_SHIFT;
      rtl818x_iowrite8(priv, &priv->map->CW_CONF, reg);

      reg = rtl818x_ioread8(priv, &priv->map->TX_AGC_CTL);
      reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_GAIN_SHIFT;
      reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_ANTSEL_SHIFT;
      reg &= ~RTL818X_TX_AGC_CTL_FEEDBACK_ANT;
      rtl818x_iowrite8(priv, &priv->map->TX_AGC_CTL, reg);

      reg  = RTL818X_TX_CONF_CW_MIN |
             (7 << 21 /* MAX TX DMA */) |
             RTL818X_TX_CONF_NO_ICV;
      rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);

      reg = rtl818x_ioread8(priv, &priv->map->CMD);
      reg |= RTL818X_CMD_TX_ENABLE;
      reg |= RTL818X_CMD_RX_ENABLE;
      rtl818x_iowrite8(priv, &priv->map->CMD, reg);

      return 0;
}

static void rtl8187_stop(struct ieee80211_hw *dev)
{
      struct rtl8187_priv *priv = dev->priv;
      struct rtl8187_rx_info *info;
      struct sk_buff *skb;
      u32 reg;

      rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);

      reg = rtl818x_ioread8(priv, &priv->map->CMD);
      reg &= ~RTL818X_CMD_TX_ENABLE;
      reg &= ~RTL818X_CMD_RX_ENABLE;
      rtl818x_iowrite8(priv, &priv->map->CMD, reg);

      rtl8225_rf_stop(dev);

      rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
      reg = rtl818x_ioread8(priv, &priv->map->CONFIG4);
      rtl818x_iowrite8(priv, &priv->map->CONFIG4, reg | RTL818X_CONFIG4_VCOOFF);
      rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);

      while ((skb = skb_dequeue(&priv->rx_queue))) {
            info = (struct rtl8187_rx_info *)skb->cb;
            usb_kill_urb(info->urb);
            kfree_skb(skb);
      }
      return;
}

static int rtl8187_add_interface(struct ieee80211_hw *dev,
                         struct ieee80211_if_init_conf *conf)
{
      struct rtl8187_priv *priv = dev->priv;
      int i;

      if (priv->mode != IEEE80211_IF_TYPE_MNTR)
            return -EOPNOTSUPP;

      switch (conf->type) {
      case IEEE80211_IF_TYPE_STA:
            priv->mode = conf->type;
            break;
      default:
            return -EOPNOTSUPP;
      }

      rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
      for (i = 0; i < ETH_ALEN; i++)
            rtl818x_iowrite8(priv, &priv->map->MAC[i],
                         ((u8 *)conf->mac_addr)[i]);
      rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);

      return 0;
}

static void rtl8187_remove_interface(struct ieee80211_hw *dev,
                             struct ieee80211_if_init_conf *conf)
{
      struct rtl8187_priv *priv = dev->priv;
      priv->mode = IEEE80211_IF_TYPE_MNTR;
}

static int rtl8187_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
{
      struct rtl8187_priv *priv = dev->priv;
      rtl8187_set_channel(dev, conf->channel);

      rtl818x_iowrite8(priv, &priv->map->SIFS, 0x22);

      if (conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME) {
            rtl818x_iowrite8(priv, &priv->map->SLOT, 0x9);
            rtl818x_iowrite8(priv, &priv->map->DIFS, 0x14);
            rtl818x_iowrite8(priv, &priv->map->EIFS, 91 - 0x14);
            rtl818x_iowrite8(priv, &priv->map->CW_VAL, 0x73);
      } else {
            rtl818x_iowrite8(priv, &priv->map->SLOT, 0x14);
            rtl818x_iowrite8(priv, &priv->map->DIFS, 0x24);
            rtl818x_iowrite8(priv, &priv->map->EIFS, 91 - 0x24);
            rtl818x_iowrite8(priv, &priv->map->CW_VAL, 0xa5);
      }

      rtl818x_iowrite16(priv, &priv->map->ATIM_WND, 2);
      rtl818x_iowrite16(priv, &priv->map->ATIMTR_INTERVAL, 100);
      rtl818x_iowrite16(priv, &priv->map->BEACON_INTERVAL, 100);
      rtl818x_iowrite16(priv, &priv->map->BEACON_INTERVAL_TIME, 100);
      return 0;
}

static int rtl8187_config_interface(struct ieee80211_hw *dev, int if_id,
                            struct ieee80211_if_conf *conf)
{
      struct rtl8187_priv *priv = dev->priv;
      int i;

      priv->if_id = if_id;

      for (i = 0; i < ETH_ALEN; i++)
            rtl818x_iowrite8(priv, &priv->map->BSSID[i], conf->bssid[i]);

      if (is_valid_ether_addr(conf->bssid))
            rtl818x_iowrite8(priv, &priv->map->MSR, RTL818X_MSR_INFRA);
      else
            rtl818x_iowrite8(priv, &priv->map->MSR, RTL818X_MSR_NO_LINK);

      return 0;
}

static void rtl8187_configure_filter(struct ieee80211_hw *dev,
                             unsigned int changed_flags,
                             unsigned int *total_flags,
                             int mc_count, struct dev_addr_list *mclist)
{
      struct rtl8187_priv *priv = dev->priv;

      if (changed_flags & FIF_FCSFAIL)
            priv->rx_conf ^= RTL818X_RX_CONF_FCS;
      if (changed_flags & FIF_CONTROL)
            priv->rx_conf ^= RTL818X_RX_CONF_CTRL;
      if (changed_flags & FIF_OTHER_BSS)
            priv->rx_conf ^= RTL818X_RX_CONF_MONITOR;
      if (*total_flags & FIF_ALLMULTI || mc_count > 0)
            priv->rx_conf |= RTL818X_RX_CONF_MULTICAST;
      else
            priv->rx_conf &= ~RTL818X_RX_CONF_MULTICAST;

      *total_flags = 0;

      if (priv->rx_conf & RTL818X_RX_CONF_FCS)
            *total_flags |= FIF_FCSFAIL;
      if (priv->rx_conf & RTL818X_RX_CONF_CTRL)
            *total_flags |= FIF_CONTROL;
      if (priv->rx_conf & RTL818X_RX_CONF_MONITOR)
            *total_flags |= FIF_OTHER_BSS;
      if (priv->rx_conf & RTL818X_RX_CONF_MULTICAST)
            *total_flags |= FIF_ALLMULTI;

      rtl818x_iowrite32_async(priv, &priv->map->RX_CONF, priv->rx_conf);
}

static const struct ieee80211_ops rtl8187_ops = {
      .tx               = rtl8187_tx,
      .start                  = rtl8187_start,
      .stop             = rtl8187_stop,
      .add_interface          = rtl8187_add_interface,
      .remove_interface = rtl8187_remove_interface,
      .config                 = rtl8187_config,
      .config_interface = rtl8187_config_interface,
      .configure_filter = rtl8187_configure_filter,
};

static void rtl8187_eeprom_register_read(struct eeprom_93cx6 *eeprom)
{
      struct ieee80211_hw *dev = eeprom->data;
      struct rtl8187_priv *priv = dev->priv;
      u8 reg = rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);

      eeprom->reg_data_in = reg & RTL818X_EEPROM_CMD_WRITE;
      eeprom->reg_data_out = reg & RTL818X_EEPROM_CMD_READ;
      eeprom->reg_data_clock = reg & RTL818X_EEPROM_CMD_CK;
      eeprom->reg_chip_select = reg & RTL818X_EEPROM_CMD_CS;
}

static void rtl8187_eeprom_register_write(struct eeprom_93cx6 *eeprom)
{
      struct ieee80211_hw *dev = eeprom->data;
      struct rtl8187_priv *priv = dev->priv;
      u8 reg = RTL818X_EEPROM_CMD_PROGRAM;

      if (eeprom->reg_data_in)
            reg |= RTL818X_EEPROM_CMD_WRITE;
      if (eeprom->reg_data_out)
            reg |= RTL818X_EEPROM_CMD_READ;
      if (eeprom->reg_data_clock)
            reg |= RTL818X_EEPROM_CMD_CK;
      if (eeprom->reg_chip_select)
            reg |= RTL818X_EEPROM_CMD_CS;

      rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, reg);
      udelay(10);
}

static int __devinit rtl8187_probe(struct usb_interface *intf,
                           const struct usb_device_id *id)
{
      struct usb_device *udev = interface_to_usbdev(intf);
      struct ieee80211_hw *dev;
      struct rtl8187_priv *priv;
      struct eeprom_93cx6 eeprom;
      struct ieee80211_channel *channel;
      u16 txpwr, reg;
      int err, i;
      DECLARE_MAC_BUF(mac);

      dev = ieee80211_alloc_hw(sizeof(*priv), &rtl8187_ops);
      if (!dev) {
            printk(KERN_ERR "rtl8187: ieee80211 alloc failed\n");
            return -ENOMEM;
      }

      priv = dev->priv;

      SET_IEEE80211_DEV(dev, &intf->dev);
      usb_set_intfdata(intf, dev);
      priv->udev = udev;

      usb_get_dev(udev);

      skb_queue_head_init(&priv->rx_queue);
      memcpy(priv->channels, rtl818x_channels, sizeof(rtl818x_channels));
      memcpy(priv->rates, rtl818x_rates, sizeof(rtl818x_rates));
      priv->map = (struct rtl818x_csr *)0xFF00;
      priv->modes[0].mode = MODE_IEEE80211G;
      priv->modes[0].num_rates = ARRAY_SIZE(rtl818x_rates);
      priv->modes[0].rates = priv->rates;
      priv->modes[0].num_channels = ARRAY_SIZE(rtl818x_channels);
      priv->modes[0].channels = priv->channels;
      priv->modes[1].mode = MODE_IEEE80211B;
      priv->modes[1].num_rates = 4;
      priv->modes[1].rates = priv->rates;
      priv->modes[1].num_channels = ARRAY_SIZE(rtl818x_channels);
      priv->modes[1].channels = priv->channels;
      priv->mode = IEEE80211_IF_TYPE_MNTR;
      dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
                 IEEE80211_HW_RX_INCLUDES_FCS;
      dev->extra_tx_headroom = sizeof(struct rtl8187_tx_hdr);
      dev->queues = 1;
      dev->max_rssi = 65;
      dev->max_signal = 64;

      for (i = 0; i < 2; i++)
            if ((err = ieee80211_register_hwmode(dev, &priv->modes[i])))
                  goto err_free_dev;

      eeprom.data = dev;
      eeprom.register_read = rtl8187_eeprom_register_read;
      eeprom.register_write = rtl8187_eeprom_register_write;
      if (rtl818x_ioread32(priv, &priv->map->RX_CONF) & (1 << 6))
            eeprom.width = PCI_EEPROM_WIDTH_93C66;
      else
            eeprom.width = PCI_EEPROM_WIDTH_93C46;

      rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
      udelay(10);

      eeprom_93cx6_multiread(&eeprom, RTL8187_EEPROM_MAC_ADDR,
                         (__le16 __force *)dev->wiphy->perm_addr, 3);
      if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
            printk(KERN_WARNING "rtl8187: Invalid hwaddr! Using randomly "
                   "generated MAC address\n");
            random_ether_addr(dev->wiphy->perm_addr);
      }

      channel = priv->channels;
      for (i = 0; i < 3; i++) {
            eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_1 + i,
                          &txpwr);
            (*channel++).val = txpwr & 0xFF;
            (*channel++).val = txpwr >> 8;
      }
      for (i = 0; i < 2; i++) {
            eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_4 + i,
                          &txpwr);
            (*channel++).val = txpwr & 0xFF;
            (*channel++).val = txpwr >> 8;
      }
      for (i = 0; i < 2; i++) {
            eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_6 + i,
                          &txpwr);
            (*channel++).val = txpwr & 0xFF;
            (*channel++).val = txpwr >> 8;
      }

      eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_BASE,
                    &priv->txpwr_base);

      reg = rtl818x_ioread16(priv, &priv->map->PGSELECT) & ~1;
      rtl818x_iowrite16(priv, &priv->map->PGSELECT, reg | 1);
      /* 0 means asic B-cut, we should use SW 3 wire
       * bit-by-bit banging for radio. 1 means we can use
       * USB specific request to write radio registers */
      priv->asic_rev = rtl818x_ioread8(priv, (u8 *)0xFFFE) & 0x3;
      rtl818x_iowrite16(priv, &priv->map->PGSELECT, reg);
      rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);

      rtl8225_write(dev, 0, 0x1B7);

      if (rtl8225_read(dev, 8) != 0x588 || rtl8225_read(dev, 9) != 0x700)
            priv->rf_init = rtl8225_rf_init;
      else
            priv->rf_init = rtl8225z2_rf_init;

      rtl8225_write(dev, 0, 0x0B7);

      err = ieee80211_register_hw(dev);
      if (err) {
            printk(KERN_ERR "rtl8187: Cannot register device\n");
            goto err_free_dev;
      }

      printk(KERN_INFO "%s: hwaddr %s, rtl8187 V%d + %s\n",
             wiphy_name(dev->wiphy), print_mac(mac, dev->wiphy->perm_addr),
             priv->asic_rev, priv->rf_init == rtl8225_rf_init ?
             "rtl8225" : "rtl8225z2");

      return 0;

 err_free_dev:
      ieee80211_free_hw(dev);
      usb_set_intfdata(intf, NULL);
      usb_put_dev(udev);
      return err;
}

static void __devexit rtl8187_disconnect(struct usb_interface *intf)
{
      struct ieee80211_hw *dev = usb_get_intfdata(intf);
      struct rtl8187_priv *priv;

      if (!dev)
            return;

      ieee80211_unregister_hw(dev);

      priv = dev->priv;
      usb_put_dev(interface_to_usbdev(intf));
      ieee80211_free_hw(dev);
}

static struct usb_driver rtl8187_driver = {
      .name       = KBUILD_MODNAME,
      .id_table   = rtl8187_table,
      .probe            = rtl8187_probe,
      .disconnect = rtl8187_disconnect,
};

static int __init rtl8187_init(void)
{
      return usb_register(&rtl8187_driver);
}

static void __exit rtl8187_exit(void)
{
      usb_deregister(&rtl8187_driver);
}

module_init(rtl8187_init);
module_exit(rtl8187_exit);

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