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main.c

/*
 *
 *  Broadcom B43legacy wireless driver
 *
 *  Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>
 *  Copyright (c) 2005-2008 Stefano Brivio <stefano.brivio@polimi.it>
 *  Copyright (c) 2005, 2006 Michael Buesch <mb@bu3sch.de>
 *  Copyright (c) 2005 Danny van Dyk <kugelfang@gentoo.org>
 *  Copyright (c) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
 *  Copyright (c) 2007 Larry Finger <Larry.Finger@lwfinger.net>
 *
 *  Some parts of the code in this file are derived from the ipw2200
 *  driver  Copyright(c) 2003 - 2004 Intel Corporation.

 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; see the file COPYING.  If not, write to
 *  the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
 *  Boston, MA 02110-1301, USA.
 *
 */

#include <linux/delay.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/if_arp.h>
#include <linux/etherdevice.h>
#include <linux/firmware.h>
#include <linux/wireless.h>
#include <linux/workqueue.h>
#include <linux/skbuff.h>
#include <linux/dma-mapping.h>
#include <net/dst.h>
#include <asm/unaligned.h>

#include "b43legacy.h"
#include "main.h"
#include "debugfs.h"
#include "phy.h"
#include "dma.h"
#include "pio.h"
#include "sysfs.h"
#include "xmit.h"
#include "radio.h"


MODULE_DESCRIPTION("Broadcom B43legacy wireless driver");
MODULE_AUTHOR("Martin Langer");
MODULE_AUTHOR("Stefano Brivio");
MODULE_AUTHOR("Michael Buesch");
MODULE_LICENSE("GPL");

MODULE_FIRMWARE(B43legacy_SUPPORTED_FIRMWARE_ID);

#if defined(CONFIG_B43LEGACY_DMA) && defined(CONFIG_B43LEGACY_PIO)
static int modparam_pio;
module_param_named(pio, modparam_pio, int, 0444);
MODULE_PARM_DESC(pio, "enable(1) / disable(0) PIO mode");
#elif defined(CONFIG_B43LEGACY_DMA)
# define modparam_pio   0
#elif defined(CONFIG_B43LEGACY_PIO)
# define modparam_pio   1
#endif

static int modparam_bad_frames_preempt;
module_param_named(bad_frames_preempt, modparam_bad_frames_preempt, int, 0444);
MODULE_PARM_DESC(bad_frames_preempt, "enable(1) / disable(0) Bad Frames"
             " Preemption");

static char modparam_fwpostfix[16];
module_param_string(fwpostfix, modparam_fwpostfix, 16, 0444);
MODULE_PARM_DESC(fwpostfix, "Postfix for the firmware files to load.");

/* The following table supports BCM4301, BCM4303 and BCM4306/2 devices. */
static const struct ssb_device_id b43legacy_ssb_tbl[] = {
      SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 2),
      SSB_DEVICE(SSB_VENDOR_BROADCOM, SSB_DEV_80211, 4),
      SSB_DEVTABLE_END
};
MODULE_DEVICE_TABLE(ssb, b43legacy_ssb_tbl);


/* Channel and ratetables are shared for all devices.
 * They can't be const, because ieee80211 puts some precalculated
 * data in there. This data is the same for all devices, so we don't
 * get concurrency issues */
#define RATETAB_ENT(_rateid, _flags) \
      {                                               \
            .bitrate    = B43legacy_RATE_TO_100KBPS(_rateid),     \
            .hw_value   = (_rateid),                        \
            .flags            = (_flags),                   \
      }
/*
 * NOTE: When changing this, sync with xmit.c's
 *     b43legacy_plcp_get_bitrate_idx_* functions!
 */
static struct ieee80211_rate __b43legacy_ratetable[] = {
      RATETAB_ENT(B43legacy_CCK_RATE_1MB, 0),
      RATETAB_ENT(B43legacy_CCK_RATE_2MB, IEEE80211_RATE_SHORT_PREAMBLE),
      RATETAB_ENT(B43legacy_CCK_RATE_5MB, IEEE80211_RATE_SHORT_PREAMBLE),
      RATETAB_ENT(B43legacy_CCK_RATE_11MB, IEEE80211_RATE_SHORT_PREAMBLE),
      RATETAB_ENT(B43legacy_OFDM_RATE_6MB, 0),
      RATETAB_ENT(B43legacy_OFDM_RATE_9MB, 0),
      RATETAB_ENT(B43legacy_OFDM_RATE_12MB, 0),
      RATETAB_ENT(B43legacy_OFDM_RATE_18MB, 0),
      RATETAB_ENT(B43legacy_OFDM_RATE_24MB, 0),
      RATETAB_ENT(B43legacy_OFDM_RATE_36MB, 0),
      RATETAB_ENT(B43legacy_OFDM_RATE_48MB, 0),
      RATETAB_ENT(B43legacy_OFDM_RATE_54MB, 0),
};
#define b43legacy_b_ratetable       (__b43legacy_ratetable + 0)
#define b43legacy_b_ratetable_size  4
#define b43legacy_g_ratetable       (__b43legacy_ratetable + 0)
#define b43legacy_g_ratetable_size  12

#define CHANTAB_ENT(_chanid, _freq) \
      {                                         \
            .center_freq      = (_freq),              \
            .hw_value   = (_chanid),                  \
      }
static struct ieee80211_channel b43legacy_bg_chantable[] = {
      CHANTAB_ENT(1, 2412),
      CHANTAB_ENT(2, 2417),
      CHANTAB_ENT(3, 2422),
      CHANTAB_ENT(4, 2427),
      CHANTAB_ENT(5, 2432),
      CHANTAB_ENT(6, 2437),
      CHANTAB_ENT(7, 2442),
      CHANTAB_ENT(8, 2447),
      CHANTAB_ENT(9, 2452),
      CHANTAB_ENT(10, 2457),
      CHANTAB_ENT(11, 2462),
      CHANTAB_ENT(12, 2467),
      CHANTAB_ENT(13, 2472),
      CHANTAB_ENT(14, 2484),
};

static struct ieee80211_supported_band b43legacy_band_2GHz_BPHY = {
      .channels = b43legacy_bg_chantable,
      .n_channels = ARRAY_SIZE(b43legacy_bg_chantable),
      .bitrates = b43legacy_b_ratetable,
      .n_bitrates = b43legacy_b_ratetable_size,
};

static struct ieee80211_supported_band b43legacy_band_2GHz_GPHY = {
      .channels = b43legacy_bg_chantable,
      .n_channels = ARRAY_SIZE(b43legacy_bg_chantable),
      .bitrates = b43legacy_g_ratetable,
      .n_bitrates = b43legacy_g_ratetable_size,
};

static void b43legacy_wireless_core_exit(struct b43legacy_wldev *dev);
static int b43legacy_wireless_core_init(struct b43legacy_wldev *dev);
static void b43legacy_wireless_core_stop(struct b43legacy_wldev *dev);
static int b43legacy_wireless_core_start(struct b43legacy_wldev *dev);


static int b43legacy_ratelimit(struct b43legacy_wl *wl)
{
      if (!wl || !wl->current_dev)
            return 1;
      if (b43legacy_status(wl->current_dev) < B43legacy_STAT_STARTED)
            return 1;
      /* We are up and running.
       * Ratelimit the messages to avoid DoS over the net. */
      return net_ratelimit();
}

void b43legacyinfo(struct b43legacy_wl *wl, const char *fmt, ...)
{
      va_list args;

      if (!b43legacy_ratelimit(wl))
            return;
      va_start(args, fmt);
      printk(KERN_INFO "b43legacy-%s: ",
             (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan");
      vprintk(fmt, args);
      va_end(args);
}

void b43legacyerr(struct b43legacy_wl *wl, const char *fmt, ...)
{
      va_list args;

      if (!b43legacy_ratelimit(wl))
            return;
      va_start(args, fmt);
      printk(KERN_ERR "b43legacy-%s ERROR: ",
             (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan");
      vprintk(fmt, args);
      va_end(args);
}

void b43legacywarn(struct b43legacy_wl *wl, const char *fmt, ...)
{
      va_list args;

      if (!b43legacy_ratelimit(wl))
            return;
      va_start(args, fmt);
      printk(KERN_WARNING "b43legacy-%s warning: ",
             (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan");
      vprintk(fmt, args);
      va_end(args);
}

#if B43legacy_DEBUG
void b43legacydbg(struct b43legacy_wl *wl, const char *fmt, ...)
{
      va_list args;

      va_start(args, fmt);
      printk(KERN_DEBUG "b43legacy-%s debug: ",
             (wl && wl->hw) ? wiphy_name(wl->hw->wiphy) : "wlan");
      vprintk(fmt, args);
      va_end(args);
}
#endif /* DEBUG */

static void b43legacy_ram_write(struct b43legacy_wldev *dev, u16 offset,
                        u32 val)
{
      u32 status;

      B43legacy_WARN_ON(offset % 4 != 0);

      status = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
      if (status & B43legacy_MACCTL_BE)
            val = swab32(val);

      b43legacy_write32(dev, B43legacy_MMIO_RAM_CONTROL, offset);
      mmiowb();
      b43legacy_write32(dev, B43legacy_MMIO_RAM_DATA, val);
}

static inline
void b43legacy_shm_control_word(struct b43legacy_wldev *dev,
                        u16 routing, u16 offset)
{
      u32 control;

      /* "offset" is the WORD offset. */

      control = routing;
      control <<= 16;
      control |= offset;
      b43legacy_write32(dev, B43legacy_MMIO_SHM_CONTROL, control);
}

u32 b43legacy_shm_read32(struct b43legacy_wldev *dev,
                   u16 routing, u16 offset)
{
      u32 ret;

      if (routing == B43legacy_SHM_SHARED) {
            B43legacy_WARN_ON((offset & 0x0001) != 0);
            if (offset & 0x0003) {
                  /* Unaligned access */
                  b43legacy_shm_control_word(dev, routing, offset >> 2);
                  ret = b43legacy_read16(dev,
                        B43legacy_MMIO_SHM_DATA_UNALIGNED);
                  ret <<= 16;
                  b43legacy_shm_control_word(dev, routing,
                                         (offset >> 2) + 1);
                  ret |= b43legacy_read16(dev, B43legacy_MMIO_SHM_DATA);

                  return ret;
            }
            offset >>= 2;
      }
      b43legacy_shm_control_word(dev, routing, offset);
      ret = b43legacy_read32(dev, B43legacy_MMIO_SHM_DATA);

      return ret;
}

u16 b43legacy_shm_read16(struct b43legacy_wldev *dev,
                     u16 routing, u16 offset)
{
      u16 ret;

      if (routing == B43legacy_SHM_SHARED) {
            B43legacy_WARN_ON((offset & 0x0001) != 0);
            if (offset & 0x0003) {
                  /* Unaligned access */
                  b43legacy_shm_control_word(dev, routing, offset >> 2);
                  ret = b43legacy_read16(dev,
                                   B43legacy_MMIO_SHM_DATA_UNALIGNED);

                  return ret;
            }
            offset >>= 2;
      }
      b43legacy_shm_control_word(dev, routing, offset);
      ret = b43legacy_read16(dev, B43legacy_MMIO_SHM_DATA);

      return ret;
}

void b43legacy_shm_write32(struct b43legacy_wldev *dev,
                     u16 routing, u16 offset,
                     u32 value)
{
      if (routing == B43legacy_SHM_SHARED) {
            B43legacy_WARN_ON((offset & 0x0001) != 0);
            if (offset & 0x0003) {
                  /* Unaligned access */
                  b43legacy_shm_control_word(dev, routing, offset >> 2);
                  mmiowb();
                  b43legacy_write16(dev,
                                B43legacy_MMIO_SHM_DATA_UNALIGNED,
                                (value >> 16) & 0xffff);
                  mmiowb();
                  b43legacy_shm_control_word(dev, routing,
                                       (offset >> 2) + 1);
                  mmiowb();
                  b43legacy_write16(dev, B43legacy_MMIO_SHM_DATA,
                                value & 0xffff);
                  return;
            }
            offset >>= 2;
      }
      b43legacy_shm_control_word(dev, routing, offset);
      mmiowb();
      b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA, value);
}

void b43legacy_shm_write16(struct b43legacy_wldev *dev, u16 routing, u16 offset,
                     u16 value)
{
      if (routing == B43legacy_SHM_SHARED) {
            B43legacy_WARN_ON((offset & 0x0001) != 0);
            if (offset & 0x0003) {
                  /* Unaligned access */
                  b43legacy_shm_control_word(dev, routing, offset >> 2);
                  mmiowb();
                  b43legacy_write16(dev,
                                B43legacy_MMIO_SHM_DATA_UNALIGNED,
                                value);
                  return;
            }
            offset >>= 2;
      }
      b43legacy_shm_control_word(dev, routing, offset);
      mmiowb();
      b43legacy_write16(dev, B43legacy_MMIO_SHM_DATA, value);
}

/* Read HostFlags */
u32 b43legacy_hf_read(struct b43legacy_wldev *dev)
{
      u32 ret;

      ret = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
                           B43legacy_SHM_SH_HOSTFHI);
      ret <<= 16;
      ret |= b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
                            B43legacy_SHM_SH_HOSTFLO);

      return ret;
}

/* Write HostFlags */
void b43legacy_hf_write(struct b43legacy_wldev *dev, u32 value)
{
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
                        B43legacy_SHM_SH_HOSTFLO,
                        (value & 0x0000FFFF));
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
                        B43legacy_SHM_SH_HOSTFHI,
                        ((value & 0xFFFF0000) >> 16));
}

void b43legacy_tsf_read(struct b43legacy_wldev *dev, u64 *tsf)
{
      /* We need to be careful. As we read the TSF from multiple
       * registers, we should take care of register overflows.
       * In theory, the whole tsf read process should be atomic.
       * We try to be atomic here, by restaring the read process,
       * if any of the high registers changed (overflew).
       */
      if (dev->dev->id.revision >= 3) {
            u32 low;
            u32 high;
            u32 high2;

            do {
                  high = b43legacy_read32(dev,
                              B43legacy_MMIO_REV3PLUS_TSF_HIGH);
                  low = b43legacy_read32(dev,
                              B43legacy_MMIO_REV3PLUS_TSF_LOW);
                  high2 = b43legacy_read32(dev,
                              B43legacy_MMIO_REV3PLUS_TSF_HIGH);
            } while (unlikely(high != high2));

            *tsf = high;
            *tsf <<= 32;
            *tsf |= low;
      } else {
            u64 tmp;
            u16 v0;
            u16 v1;
            u16 v2;
            u16 v3;
            u16 test1;
            u16 test2;
            u16 test3;

            do {
                  v3 = b43legacy_read16(dev, B43legacy_MMIO_TSF_3);
                  v2 = b43legacy_read16(dev, B43legacy_MMIO_TSF_2);
                  v1 = b43legacy_read16(dev, B43legacy_MMIO_TSF_1);
                  v0 = b43legacy_read16(dev, B43legacy_MMIO_TSF_0);

                  test3 = b43legacy_read16(dev, B43legacy_MMIO_TSF_3);
                  test2 = b43legacy_read16(dev, B43legacy_MMIO_TSF_2);
                  test1 = b43legacy_read16(dev, B43legacy_MMIO_TSF_1);
            } while (v3 != test3 || v2 != test2 || v1 != test1);

            *tsf = v3;
            *tsf <<= 48;
            tmp = v2;
            tmp <<= 32;
            *tsf |= tmp;
            tmp = v1;
            tmp <<= 16;
            *tsf |= tmp;
            *tsf |= v0;
      }
}

static void b43legacy_time_lock(struct b43legacy_wldev *dev)
{
      u32 status;

      status = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
      status |= B43legacy_MACCTL_TBTTHOLD;
      b43legacy_write32(dev, B43legacy_MMIO_MACCTL, status);
      mmiowb();
}

static void b43legacy_time_unlock(struct b43legacy_wldev *dev)
{
      u32 status;

      status = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
      status &= ~B43legacy_MACCTL_TBTTHOLD;
      b43legacy_write32(dev, B43legacy_MMIO_MACCTL, status);
}

static void b43legacy_tsf_write_locked(struct b43legacy_wldev *dev, u64 tsf)
{
      /* Be careful with the in-progress timer.
       * First zero out the low register, so we have a full
       * register-overflow duration to complete the operation.
       */
      if (dev->dev->id.revision >= 3) {
            u32 lo = (tsf & 0x00000000FFFFFFFFULL);
            u32 hi = (tsf & 0xFFFFFFFF00000000ULL) >> 32;

            b43legacy_write32(dev, B43legacy_MMIO_REV3PLUS_TSF_LOW, 0);
            mmiowb();
            b43legacy_write32(dev, B43legacy_MMIO_REV3PLUS_TSF_HIGH,
                            hi);
            mmiowb();
            b43legacy_write32(dev, B43legacy_MMIO_REV3PLUS_TSF_LOW,
                            lo);
      } else {
            u16 v0 = (tsf & 0x000000000000FFFFULL);
            u16 v1 = (tsf & 0x00000000FFFF0000ULL) >> 16;
            u16 v2 = (tsf & 0x0000FFFF00000000ULL) >> 32;
            u16 v3 = (tsf & 0xFFFF000000000000ULL) >> 48;

            b43legacy_write16(dev, B43legacy_MMIO_TSF_0, 0);
            mmiowb();
            b43legacy_write16(dev, B43legacy_MMIO_TSF_3, v3);
            mmiowb();
            b43legacy_write16(dev, B43legacy_MMIO_TSF_2, v2);
            mmiowb();
            b43legacy_write16(dev, B43legacy_MMIO_TSF_1, v1);
            mmiowb();
            b43legacy_write16(dev, B43legacy_MMIO_TSF_0, v0);
      }
}

void b43legacy_tsf_write(struct b43legacy_wldev *dev, u64 tsf)
{
      b43legacy_time_lock(dev);
      b43legacy_tsf_write_locked(dev, tsf);
      b43legacy_time_unlock(dev);
}

static
void b43legacy_macfilter_set(struct b43legacy_wldev *dev,
                       u16 offset, const u8 *mac)
{
      static const u8 zero_addr[ETH_ALEN] = { 0 };
      u16 data;

      if (!mac)
            mac = zero_addr;

      offset |= 0x0020;
      b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_CONTROL, offset);

      data = mac[0];
      data |= mac[1] << 8;
      b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_DATA, data);
      data = mac[2];
      data |= mac[3] << 8;
      b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_DATA, data);
      data = mac[4];
      data |= mac[5] << 8;
      b43legacy_write16(dev, B43legacy_MMIO_MACFILTER_DATA, data);
}

static void b43legacy_write_mac_bssid_templates(struct b43legacy_wldev *dev)
{
      static const u8 zero_addr[ETH_ALEN] = { 0 };
      const u8 *mac = dev->wl->mac_addr;
      const u8 *bssid = dev->wl->bssid;
      u8 mac_bssid[ETH_ALEN * 2];
      int i;
      u32 tmp;

      if (!bssid)
            bssid = zero_addr;
      if (!mac)
            mac = zero_addr;

      b43legacy_macfilter_set(dev, B43legacy_MACFILTER_BSSID, bssid);

      memcpy(mac_bssid, mac, ETH_ALEN);
      memcpy(mac_bssid + ETH_ALEN, bssid, ETH_ALEN);

      /* Write our MAC address and BSSID to template ram */
      for (i = 0; i < ARRAY_SIZE(mac_bssid); i += sizeof(u32)) {
            tmp =  (u32)(mac_bssid[i + 0]);
            tmp |= (u32)(mac_bssid[i + 1]) << 8;
            tmp |= (u32)(mac_bssid[i + 2]) << 16;
            tmp |= (u32)(mac_bssid[i + 3]) << 24;
            b43legacy_ram_write(dev, 0x20 + i, tmp);
            b43legacy_ram_write(dev, 0x78 + i, tmp);
            b43legacy_ram_write(dev, 0x478 + i, tmp);
      }
}

static void b43legacy_upload_card_macaddress(struct b43legacy_wldev *dev)
{
      b43legacy_write_mac_bssid_templates(dev);
      b43legacy_macfilter_set(dev, B43legacy_MACFILTER_SELF,
                        dev->wl->mac_addr);
}

static void b43legacy_set_slot_time(struct b43legacy_wldev *dev,
                            u16 slot_time)
{
      /* slot_time is in usec. */
      if (dev->phy.type != B43legacy_PHYTYPE_G)
            return;
      b43legacy_write16(dev, 0x684, 510 + slot_time);
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0010,
                        slot_time);
}

static void b43legacy_short_slot_timing_enable(struct b43legacy_wldev *dev)
{
      b43legacy_set_slot_time(dev, 9);
}

static void b43legacy_short_slot_timing_disable(struct b43legacy_wldev *dev)
{
      b43legacy_set_slot_time(dev, 20);
}

/* Synchronize IRQ top- and bottom-half.
 * IRQs must be masked before calling this.
 * This must not be called with the irq_lock held.
 */
static void b43legacy_synchronize_irq(struct b43legacy_wldev *dev)
{
      synchronize_irq(dev->dev->irq);
      tasklet_kill(&dev->isr_tasklet);
}

/* DummyTransmission function, as documented on
 * http://bcm-specs.sipsolutions.net/DummyTransmission
 */
void b43legacy_dummy_transmission(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;
      unsigned int i;
      unsigned int max_loop;
      u16 value;
      u32 buffer[5] = {
            0x00000000,
            0x00D40000,
            0x00000000,
            0x01000000,
            0x00000000,
      };

      switch (phy->type) {
      case B43legacy_PHYTYPE_B:
      case B43legacy_PHYTYPE_G:
            max_loop = 0xFA;
            buffer[0] = 0x000B846E;
            break;
      default:
            B43legacy_BUG_ON(1);
            return;
      }

      for (i = 0; i < 5; i++)
            b43legacy_ram_write(dev, i * 4, buffer[i]);

      /* dummy read follows */
      b43legacy_read32(dev, B43legacy_MMIO_MACCTL);

      b43legacy_write16(dev, 0x0568, 0x0000);
      b43legacy_write16(dev, 0x07C0, 0x0000);
      b43legacy_write16(dev, 0x050C, 0x0000);
      b43legacy_write16(dev, 0x0508, 0x0000);
      b43legacy_write16(dev, 0x050A, 0x0000);
      b43legacy_write16(dev, 0x054C, 0x0000);
      b43legacy_write16(dev, 0x056A, 0x0014);
      b43legacy_write16(dev, 0x0568, 0x0826);
      b43legacy_write16(dev, 0x0500, 0x0000);
      b43legacy_write16(dev, 0x0502, 0x0030);

      if (phy->radio_ver == 0x2050 && phy->radio_rev <= 0x5)
            b43legacy_radio_write16(dev, 0x0051, 0x0017);
      for (i = 0x00; i < max_loop; i++) {
            value = b43legacy_read16(dev, 0x050E);
            if (value & 0x0080)
                  break;
            udelay(10);
      }
      for (i = 0x00; i < 0x0A; i++) {
            value = b43legacy_read16(dev, 0x050E);
            if (value & 0x0400)
                  break;
            udelay(10);
      }
      for (i = 0x00; i < 0x0A; i++) {
            value = b43legacy_read16(dev, 0x0690);
            if (!(value & 0x0100))
                  break;
            udelay(10);
      }
      if (phy->radio_ver == 0x2050 && phy->radio_rev <= 0x5)
            b43legacy_radio_write16(dev, 0x0051, 0x0037);
}

/* Turn the Analog ON/OFF */
static void b43legacy_switch_analog(struct b43legacy_wldev *dev, int on)
{
      b43legacy_write16(dev, B43legacy_MMIO_PHY0, on ? 0 : 0xF4);
}

void b43legacy_wireless_core_reset(struct b43legacy_wldev *dev, u32 flags)
{
      u32 tmslow;
      u32 macctl;

      flags |= B43legacy_TMSLOW_PHYCLKEN;
      flags |= B43legacy_TMSLOW_PHYRESET;
      ssb_device_enable(dev->dev, flags);
      msleep(2); /* Wait for the PLL to turn on. */

      /* Now take the PHY out of Reset again */
      tmslow = ssb_read32(dev->dev, SSB_TMSLOW);
      tmslow |= SSB_TMSLOW_FGC;
      tmslow &= ~B43legacy_TMSLOW_PHYRESET;
      ssb_write32(dev->dev, SSB_TMSLOW, tmslow);
      ssb_read32(dev->dev, SSB_TMSLOW); /* flush */
      msleep(1);
      tmslow &= ~SSB_TMSLOW_FGC;
      ssb_write32(dev->dev, SSB_TMSLOW, tmslow);
      ssb_read32(dev->dev, SSB_TMSLOW); /* flush */
      msleep(1);

      /* Turn Analog ON */
      b43legacy_switch_analog(dev, 1);

      macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
      macctl &= ~B43legacy_MACCTL_GMODE;
      if (flags & B43legacy_TMSLOW_GMODE) {
            macctl |= B43legacy_MACCTL_GMODE;
            dev->phy.gmode = 1;
      } else
            dev->phy.gmode = 0;
      macctl |= B43legacy_MACCTL_IHR_ENABLED;
      b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
}

static void handle_irq_transmit_status(struct b43legacy_wldev *dev)
{
      u32 v0;
      u32 v1;
      u16 tmp;
      struct b43legacy_txstatus stat;

      while (1) {
            v0 = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_0);
            if (!(v0 & 0x00000001))
                  break;
            v1 = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_1);

            stat.cookie = (v0 >> 16);
            stat.seq = (v1 & 0x0000FFFF);
            stat.phy_stat = ((v1 & 0x00FF0000) >> 16);
            tmp = (v0 & 0x0000FFFF);
            stat.frame_count = ((tmp & 0xF000) >> 12);
            stat.rts_count = ((tmp & 0x0F00) >> 8);
            stat.supp_reason = ((tmp & 0x001C) >> 2);
            stat.pm_indicated = !!(tmp & 0x0080);
            stat.intermediate = !!(tmp & 0x0040);
            stat.for_ampdu = !!(tmp & 0x0020);
            stat.acked = !!(tmp & 0x0002);

            b43legacy_handle_txstatus(dev, &stat);
      }
}

static void drain_txstatus_queue(struct b43legacy_wldev *dev)
{
      u32 dummy;

      if (dev->dev->id.revision < 5)
            return;
      /* Read all entries from the microcode TXstatus FIFO
       * and throw them away.
       */
      while (1) {
            dummy = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_0);
            if (!(dummy & 0x00000001))
                  break;
            dummy = b43legacy_read32(dev, B43legacy_MMIO_XMITSTAT_1);
      }
}

static u32 b43legacy_jssi_read(struct b43legacy_wldev *dev)
{
      u32 val = 0;

      val = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 0x40A);
      val <<= 16;
      val |= b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 0x408);

      return val;
}

static void b43legacy_jssi_write(struct b43legacy_wldev *dev, u32 jssi)
{
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x408,
                        (jssi & 0x0000FFFF));
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x40A,
                        (jssi & 0xFFFF0000) >> 16);
}

static void b43legacy_generate_noise_sample(struct b43legacy_wldev *dev)
{
      b43legacy_jssi_write(dev, 0x7F7F7F7F);
      b43legacy_write32(dev, B43legacy_MMIO_MACCMD,
                    b43legacy_read32(dev, B43legacy_MMIO_MACCMD)
                    | B43legacy_MACCMD_BGNOISE);
      B43legacy_WARN_ON(dev->noisecalc.channel_at_start !=
                      dev->phy.channel);
}

static void b43legacy_calculate_link_quality(struct b43legacy_wldev *dev)
{
      /* Top half of Link Quality calculation. */

      if (dev->noisecalc.calculation_running)
            return;
      dev->noisecalc.channel_at_start = dev->phy.channel;
      dev->noisecalc.calculation_running = 1;
      dev->noisecalc.nr_samples = 0;

      b43legacy_generate_noise_sample(dev);
}

static void handle_irq_noise(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;
      u16 tmp;
      u8 noise[4];
      u8 i;
      u8 j;
      s32 average;

      /* Bottom half of Link Quality calculation. */

      B43legacy_WARN_ON(!dev->noisecalc.calculation_running);
      if (dev->noisecalc.channel_at_start != phy->channel)
            goto drop_calculation;
      *((__le32 *)noise) = cpu_to_le32(b43legacy_jssi_read(dev));
      if (noise[0] == 0x7F || noise[1] == 0x7F ||
          noise[2] == 0x7F || noise[3] == 0x7F)
            goto generate_new;

      /* Get the noise samples. */
      B43legacy_WARN_ON(dev->noisecalc.nr_samples >= 8);
      i = dev->noisecalc.nr_samples;
      noise[0] = clamp_val(noise[0], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
      noise[1] = clamp_val(noise[1], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
      noise[2] = clamp_val(noise[2], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
      noise[3] = clamp_val(noise[3], 0, ARRAY_SIZE(phy->nrssi_lt) - 1);
      dev->noisecalc.samples[i][0] = phy->nrssi_lt[noise[0]];
      dev->noisecalc.samples[i][1] = phy->nrssi_lt[noise[1]];
      dev->noisecalc.samples[i][2] = phy->nrssi_lt[noise[2]];
      dev->noisecalc.samples[i][3] = phy->nrssi_lt[noise[3]];
      dev->noisecalc.nr_samples++;
      if (dev->noisecalc.nr_samples == 8) {
            /* Calculate the Link Quality by the noise samples. */
            average = 0;
            for (i = 0; i < 8; i++) {
                  for (j = 0; j < 4; j++)
                        average += dev->noisecalc.samples[i][j];
            }
            average /= (8 * 4);
            average *= 125;
            average += 64;
            average /= 128;
            tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
                                   0x40C);
            tmp = (tmp / 128) & 0x1F;
            if (tmp >= 8)
                  average += 2;
            else
                  average -= 25;
            if (tmp == 8)
                  average -= 72;
            else
                  average -= 48;

            dev->stats.link_noise = average;
drop_calculation:
            dev->noisecalc.calculation_running = 0;
            return;
      }
generate_new:
      b43legacy_generate_noise_sample(dev);
}

static void handle_irq_tbtt_indication(struct b43legacy_wldev *dev)
{
      if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_AP)) {
            /* TODO: PS TBTT */
      } else {
            if (1/*FIXME: the last PSpoll frame was sent successfully */)
                  b43legacy_power_saving_ctl_bits(dev, -1, -1);
      }
      if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_ADHOC))
            dev->dfq_valid = 1;
}

static void handle_irq_atim_end(struct b43legacy_wldev *dev)
{
      if (dev->dfq_valid) {
            b43legacy_write32(dev, B43legacy_MMIO_MACCMD,
                          b43legacy_read32(dev, B43legacy_MMIO_MACCMD)
                          | B43legacy_MACCMD_DFQ_VALID);
            dev->dfq_valid = 0;
      }
}

static void handle_irq_pmq(struct b43legacy_wldev *dev)
{
      u32 tmp;

      /* TODO: AP mode. */

      while (1) {
            tmp = b43legacy_read32(dev, B43legacy_MMIO_PS_STATUS);
            if (!(tmp & 0x00000008))
                  break;
      }
      /* 16bit write is odd, but correct. */
      b43legacy_write16(dev, B43legacy_MMIO_PS_STATUS, 0x0002);
}

static void b43legacy_write_template_common(struct b43legacy_wldev *dev,
                                  const u8 *data, u16 size,
                                  u16 ram_offset,
                                  u16 shm_size_offset, u8 rate)
{
      u32 i;
      u32 tmp;
      struct b43legacy_plcp_hdr4 plcp;

      plcp.data = 0;
      b43legacy_generate_plcp_hdr(&plcp, size + FCS_LEN, rate);
      b43legacy_ram_write(dev, ram_offset, le32_to_cpu(plcp.data));
      ram_offset += sizeof(u32);
      /* The PLCP is 6 bytes long, but we only wrote 4 bytes, yet.
       * So leave the first two bytes of the next write blank.
       */
      tmp = (u32)(data[0]) << 16;
      tmp |= (u32)(data[1]) << 24;
      b43legacy_ram_write(dev, ram_offset, tmp);
      ram_offset += sizeof(u32);
      for (i = 2; i < size; i += sizeof(u32)) {
            tmp = (u32)(data[i + 0]);
            if (i + 1 < size)
                  tmp |= (u32)(data[i + 1]) << 8;
            if (i + 2 < size)
                  tmp |= (u32)(data[i + 2]) << 16;
            if (i + 3 < size)
                  tmp |= (u32)(data[i + 3]) << 24;
            b43legacy_ram_write(dev, ram_offset + i - 2, tmp);
      }
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_size_offset,
                        size + sizeof(struct b43legacy_plcp_hdr6));
}

/* Convert a b43legacy antenna number value to the PHY TX control value. */
static u16 b43legacy_antenna_to_phyctl(int antenna)
{
      switch (antenna) {
      case B43legacy_ANTENNA0:
            return B43legacy_TX4_PHY_ANT0;
      case B43legacy_ANTENNA1:
            return B43legacy_TX4_PHY_ANT1;
      }
      return B43legacy_TX4_PHY_ANTLAST;
}

static void b43legacy_write_beacon_template(struct b43legacy_wldev *dev,
                                  u16 ram_offset,
                                  u16 shm_size_offset)
{

      unsigned int i, len, variable_len;
      const struct ieee80211_mgmt *bcn;
      const u8 *ie;
      bool tim_found = 0;
      unsigned int rate;
      u16 ctl;
      int antenna;
      struct ieee80211_tx_info *info = IEEE80211_SKB_CB(dev->wl->current_beacon);

      bcn = (const struct ieee80211_mgmt *)(dev->wl->current_beacon->data);
      len = min((size_t)dev->wl->current_beacon->len,
              0x200 - sizeof(struct b43legacy_plcp_hdr6));
      rate = ieee80211_get_tx_rate(dev->wl->hw, info)->hw_value;

      b43legacy_write_template_common(dev, (const u8 *)bcn, len, ram_offset,
                              shm_size_offset, rate);

      /* Write the PHY TX control parameters. */
      antenna = B43legacy_ANTENNA_DEFAULT;
      antenna = b43legacy_antenna_to_phyctl(antenna);
      ctl = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
                           B43legacy_SHM_SH_BEACPHYCTL);
      /* We can't send beacons with short preamble. Would get PHY errors. */
      ctl &= ~B43legacy_TX4_PHY_SHORTPRMBL;
      ctl &= ~B43legacy_TX4_PHY_ANT;
      ctl &= ~B43legacy_TX4_PHY_ENC;
      ctl |= antenna;
      ctl |= B43legacy_TX4_PHY_ENC_CCK;
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
                        B43legacy_SHM_SH_BEACPHYCTL, ctl);

      /* Find the position of the TIM and the DTIM_period value
       * and write them to SHM. */
      ie = bcn->u.beacon.variable;
      variable_len = len - offsetof(struct ieee80211_mgmt, u.beacon.variable);
      for (i = 0; i < variable_len - 2; ) {
            uint8_t ie_id, ie_len;

            ie_id = ie[i];
            ie_len = ie[i + 1];
            if (ie_id == 5) {
                  u16 tim_position;
                  u16 dtim_period;
                  /* This is the TIM Information Element */

                  /* Check whether the ie_len is in the beacon data range. */
                  if (variable_len < ie_len + 2 + i)
                        break;
                  /* A valid TIM is at least 4 bytes long. */
                  if (ie_len < 4)
                        break;
                  tim_found = 1;

                  tim_position = sizeof(struct b43legacy_plcp_hdr6);
                  tim_position += offsetof(struct ieee80211_mgmt,
                                     u.beacon.variable);
                  tim_position += i;

                  dtim_period = ie[i + 3];

                  b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
                              B43legacy_SHM_SH_TIMPOS, tim_position);
                  b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
                              B43legacy_SHM_SH_DTIMP, dtim_period);
                  break;
            }
            i += ie_len + 2;
      }
      if (!tim_found) {
            b43legacywarn(dev->wl, "Did not find a valid TIM IE in the "
                        "beacon template packet. AP or IBSS operation "
                        "may be broken.\n");
      } else
            b43legacydbg(dev->wl, "Updated beacon template\n");
}

static void b43legacy_write_probe_resp_plcp(struct b43legacy_wldev *dev,
                                  u16 shm_offset, u16 size,
                                  struct ieee80211_rate *rate)
{
      struct b43legacy_plcp_hdr4 plcp;
      u32 tmp;
      __le16 dur;

      plcp.data = 0;
      b43legacy_generate_plcp_hdr(&plcp, size + FCS_LEN, rate->hw_value);
      dur = ieee80211_generic_frame_duration(dev->wl->hw,
                                     dev->wl->vif,
                                     size,
                                     rate);
      /* Write PLCP in two parts and timing for packet transfer */
      tmp = le32_to_cpu(plcp.data);
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_offset,
                        tmp & 0xFFFF);
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_offset + 2,
                        tmp >> 16);
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, shm_offset + 6,
                        le16_to_cpu(dur));
}

/* Instead of using custom probe response template, this function
 * just patches custom beacon template by:
 * 1) Changing packet type
 * 2) Patching duration field
 * 3) Stripping TIM
 */
static const u8 *b43legacy_generate_probe_resp(struct b43legacy_wldev *dev,
                                     u16 *dest_size,
                                     struct ieee80211_rate *rate)
{
      const u8 *src_data;
      u8 *dest_data;
      u16 src_size, elem_size, src_pos, dest_pos;
      __le16 dur;
      struct ieee80211_hdr *hdr;
      size_t ie_start;

      src_size = dev->wl->current_beacon->len;
      src_data = (const u8 *)dev->wl->current_beacon->data;

      /* Get the start offset of the variable IEs in the packet. */
      ie_start = offsetof(struct ieee80211_mgmt, u.probe_resp.variable);
      B43legacy_WARN_ON(ie_start != offsetof(struct ieee80211_mgmt,
                                     u.beacon.variable));

      if (B43legacy_WARN_ON(src_size < ie_start))
            return NULL;

      dest_data = kmalloc(src_size, GFP_ATOMIC);
      if (unlikely(!dest_data))
            return NULL;

      /* Copy the static data and all Information Elements, except the TIM. */
      memcpy(dest_data, src_data, ie_start);
      src_pos = ie_start;
      dest_pos = ie_start;
      for ( ; src_pos < src_size - 2; src_pos += elem_size) {
            elem_size = src_data[src_pos + 1] + 2;
            if (src_data[src_pos] == 5) {
                  /* This is the TIM. */
                  continue;
            }
            memcpy(dest_data + dest_pos, src_data + src_pos, elem_size);
            dest_pos += elem_size;
      }
      *dest_size = dest_pos;
      hdr = (struct ieee80211_hdr *)dest_data;

      /* Set the frame control. */
      hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
                               IEEE80211_STYPE_PROBE_RESP);
      dur = ieee80211_generic_frame_duration(dev->wl->hw,
                                     dev->wl->vif,
                                     *dest_size,
                                     rate);
      hdr->duration_id = dur;

      return dest_data;
}

static void b43legacy_write_probe_resp_template(struct b43legacy_wldev *dev,
                                    u16 ram_offset,
                                    u16 shm_size_offset,
                                    struct ieee80211_rate *rate)
{
      const u8 *probe_resp_data;
      u16 size;

      size = dev->wl->current_beacon->len;
      probe_resp_data = b43legacy_generate_probe_resp(dev, &size, rate);
      if (unlikely(!probe_resp_data))
            return;

      /* Looks like PLCP headers plus packet timings are stored for
       * all possible basic rates
       */
      b43legacy_write_probe_resp_plcp(dev, 0x31A, size,
                              &b43legacy_b_ratetable[0]);
      b43legacy_write_probe_resp_plcp(dev, 0x32C, size,
                              &b43legacy_b_ratetable[1]);
      b43legacy_write_probe_resp_plcp(dev, 0x33E, size,
                              &b43legacy_b_ratetable[2]);
      b43legacy_write_probe_resp_plcp(dev, 0x350, size,
                              &b43legacy_b_ratetable[3]);

      size = min((size_t)size,
               0x200 - sizeof(struct b43legacy_plcp_hdr6));
      b43legacy_write_template_common(dev, probe_resp_data,
                              size, ram_offset,
                              shm_size_offset, rate->hw_value);
      kfree(probe_resp_data);
}

static void b43legacy_upload_beacon0(struct b43legacy_wldev *dev)
{
      struct b43legacy_wl *wl = dev->wl;

      if (wl->beacon0_uploaded)
            return;
      b43legacy_write_beacon_template(dev, 0x68, 0x18);
      /* FIXME: Probe resp upload doesn't really belong here,
       *        but we don't use that feature anyway. */
      b43legacy_write_probe_resp_template(dev, 0x268, 0x4A,
                              &__b43legacy_ratetable[3]);
      wl->beacon0_uploaded = 1;
}

static void b43legacy_upload_beacon1(struct b43legacy_wldev *dev)
{
      struct b43legacy_wl *wl = dev->wl;

      if (wl->beacon1_uploaded)
            return;
      b43legacy_write_beacon_template(dev, 0x468, 0x1A);
      wl->beacon1_uploaded = 1;
}

static void handle_irq_beacon(struct b43legacy_wldev *dev)
{
      struct b43legacy_wl *wl = dev->wl;
      u32 cmd, beacon0_valid, beacon1_valid;

      if (!b43legacy_is_mode(wl, NL80211_IFTYPE_AP))
            return;

      /* This is the bottom half of the asynchronous beacon update. */

      /* Ignore interrupt in the future. */
      dev->irq_mask &= ~B43legacy_IRQ_BEACON;

      cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
      beacon0_valid = (cmd & B43legacy_MACCMD_BEACON0_VALID);
      beacon1_valid = (cmd & B43legacy_MACCMD_BEACON1_VALID);

      /* Schedule interrupt manually, if busy. */
      if (beacon0_valid && beacon1_valid) {
            b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON, B43legacy_IRQ_BEACON);
            dev->irq_mask |= B43legacy_IRQ_BEACON;
            return;
      }

      if (unlikely(wl->beacon_templates_virgin)) {
            /* We never uploaded a beacon before.
             * Upload both templates now, but only mark one valid. */
            wl->beacon_templates_virgin = 0;
            b43legacy_upload_beacon0(dev);
            b43legacy_upload_beacon1(dev);
            cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
            cmd |= B43legacy_MACCMD_BEACON0_VALID;
            b43legacy_write32(dev, B43legacy_MMIO_MACCMD, cmd);
      } else {
            if (!beacon0_valid) {
                  b43legacy_upload_beacon0(dev);
                  cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
                  cmd |= B43legacy_MACCMD_BEACON0_VALID;
                  b43legacy_write32(dev, B43legacy_MMIO_MACCMD, cmd);
            } else if (!beacon1_valid) {
                  b43legacy_upload_beacon1(dev);
                  cmd = b43legacy_read32(dev, B43legacy_MMIO_MACCMD);
                  cmd |= B43legacy_MACCMD_BEACON1_VALID;
                  b43legacy_write32(dev, B43legacy_MMIO_MACCMD, cmd);
            }
      }
}

static void b43legacy_beacon_update_trigger_work(struct work_struct *work)
{
      struct b43legacy_wl *wl = container_of(work, struct b43legacy_wl,
                               beacon_update_trigger);
      struct b43legacy_wldev *dev;

      mutex_lock(&wl->mutex);
      dev = wl->current_dev;
      if (likely(dev && (b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED))) {
            spin_lock_irq(&wl->irq_lock);
            /* Update beacon right away or defer to IRQ. */
            handle_irq_beacon(dev);
            /* The handler might have updated the IRQ mask. */
            b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK,
                          dev->irq_mask);
            mmiowb();
            spin_unlock_irq(&wl->irq_lock);
      }
      mutex_unlock(&wl->mutex);
}

/* Asynchronously update the packet templates in template RAM.
 * Locking: Requires wl->irq_lock to be locked. */
static void b43legacy_update_templates(struct b43legacy_wl *wl)
{
      struct sk_buff *beacon;
      /* This is the top half of the ansynchronous beacon update. The bottom
       * half is the beacon IRQ. Beacon update must be asynchronous to avoid
       * sending an invalid beacon. This can happen for example, if the
       * firmware transmits a beacon while we are updating it. */

      /* We could modify the existing beacon and set the aid bit in the TIM
       * field, but that would probably require resizing and moving of data
       * within the beacon template. Simply request a new beacon and let
       * mac80211 do the hard work. */
      beacon = ieee80211_beacon_get(wl->hw, wl->vif);
      if (unlikely(!beacon))
            return;

      if (wl->current_beacon)
            dev_kfree_skb_any(wl->current_beacon);
      wl->current_beacon = beacon;
      wl->beacon0_uploaded = 0;
      wl->beacon1_uploaded = 0;
      queue_work(wl->hw->workqueue, &wl->beacon_update_trigger);
}

static void b43legacy_set_beacon_int(struct b43legacy_wldev *dev,
                             u16 beacon_int)
{
      b43legacy_time_lock(dev);
      if (dev->dev->id.revision >= 3) {
            b43legacy_write32(dev, B43legacy_MMIO_TSF_CFP_REP,
                         (beacon_int << 16));
            b43legacy_write32(dev, B43legacy_MMIO_TSF_CFP_START,
                         (beacon_int << 10));
      } else {
            b43legacy_write16(dev, 0x606, (beacon_int >> 6));
            b43legacy_write16(dev, 0x610, beacon_int);
      }
      b43legacy_time_unlock(dev);
      b43legacydbg(dev->wl, "Set beacon interval to %u\n", beacon_int);
}

static void handle_irq_ucode_debug(struct b43legacy_wldev *dev)
{
}

/* Interrupt handler bottom-half */
static void b43legacy_interrupt_tasklet(struct b43legacy_wldev *dev)
{
      u32 reason;
      u32 dma_reason[ARRAY_SIZE(dev->dma_reason)];
      u32 merged_dma_reason = 0;
      int i;
      unsigned long flags;

      spin_lock_irqsave(&dev->wl->irq_lock, flags);

      B43legacy_WARN_ON(b43legacy_status(dev) <
                    B43legacy_STAT_INITIALIZED);

      reason = dev->irq_reason;
      for (i = 0; i < ARRAY_SIZE(dma_reason); i++) {
            dma_reason[i] = dev->dma_reason[i];
            merged_dma_reason |= dma_reason[i];
      }

      if (unlikely(reason & B43legacy_IRQ_MAC_TXERR))
            b43legacyerr(dev->wl, "MAC transmission error\n");

      if (unlikely(reason & B43legacy_IRQ_PHY_TXERR)) {
            b43legacyerr(dev->wl, "PHY transmission error\n");
            rmb();
            if (unlikely(atomic_dec_and_test(&dev->phy.txerr_cnt))) {
                  b43legacyerr(dev->wl, "Too many PHY TX errors, "
                                    "restarting the controller\n");
                  b43legacy_controller_restart(dev, "PHY TX errors");
            }
      }

      if (unlikely(merged_dma_reason & (B43legacy_DMAIRQ_FATALMASK |
                                B43legacy_DMAIRQ_NONFATALMASK))) {
            if (merged_dma_reason & B43legacy_DMAIRQ_FATALMASK) {
                  b43legacyerr(dev->wl, "Fatal DMA error: "
                         "0x%08X, 0x%08X, 0x%08X, "
                         "0x%08X, 0x%08X, 0x%08X\n",
                         dma_reason[0], dma_reason[1],
                         dma_reason[2], dma_reason[3],
                         dma_reason[4], dma_reason[5]);
                  b43legacy_controller_restart(dev, "DMA error");
                  mmiowb();
                  spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
                  return;
            }
            if (merged_dma_reason & B43legacy_DMAIRQ_NONFATALMASK)
                  b43legacyerr(dev->wl, "DMA error: "
                         "0x%08X, 0x%08X, 0x%08X, "
                         "0x%08X, 0x%08X, 0x%08X\n",
                         dma_reason[0], dma_reason[1],
                         dma_reason[2], dma_reason[3],
                         dma_reason[4], dma_reason[5]);
      }

      if (unlikely(reason & B43legacy_IRQ_UCODE_DEBUG))
            handle_irq_ucode_debug(dev);
      if (reason & B43legacy_IRQ_TBTT_INDI)
            handle_irq_tbtt_indication(dev);
      if (reason & B43legacy_IRQ_ATIM_END)
            handle_irq_atim_end(dev);
      if (reason & B43legacy_IRQ_BEACON)
            handle_irq_beacon(dev);
      if (reason & B43legacy_IRQ_PMQ)
            handle_irq_pmq(dev);
      if (reason & B43legacy_IRQ_TXFIFO_FLUSH_OK)
            ;/*TODO*/
      if (reason & B43legacy_IRQ_NOISESAMPLE_OK)
            handle_irq_noise(dev);

      /* Check the DMA reason registers for received data. */
      if (dma_reason[0] & B43legacy_DMAIRQ_RX_DONE) {
            if (b43legacy_using_pio(dev))
                  b43legacy_pio_rx(dev->pio.queue0);
            else
                  b43legacy_dma_rx(dev->dma.rx_ring0);
      }
      B43legacy_WARN_ON(dma_reason[1] & B43legacy_DMAIRQ_RX_DONE);
      B43legacy_WARN_ON(dma_reason[2] & B43legacy_DMAIRQ_RX_DONE);
      if (dma_reason[3] & B43legacy_DMAIRQ_RX_DONE) {
            if (b43legacy_using_pio(dev))
                  b43legacy_pio_rx(dev->pio.queue3);
            else
                  b43legacy_dma_rx(dev->dma.rx_ring3);
      }
      B43legacy_WARN_ON(dma_reason[4] & B43legacy_DMAIRQ_RX_DONE);
      B43legacy_WARN_ON(dma_reason[5] & B43legacy_DMAIRQ_RX_DONE);

      if (reason & B43legacy_IRQ_TX_OK)
            handle_irq_transmit_status(dev);

      b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
      mmiowb();
      spin_unlock_irqrestore(&dev->wl->irq_lock, flags);
}

static void pio_irq_workaround(struct b43legacy_wldev *dev,
                         u16 base, int queueidx)
{
      u16 rxctl;

      rxctl = b43legacy_read16(dev, base + B43legacy_PIO_RXCTL);
      if (rxctl & B43legacy_PIO_RXCTL_DATAAVAILABLE)
            dev->dma_reason[queueidx] |= B43legacy_DMAIRQ_RX_DONE;
      else
            dev->dma_reason[queueidx] &= ~B43legacy_DMAIRQ_RX_DONE;
}

static void b43legacy_interrupt_ack(struct b43legacy_wldev *dev, u32 reason)
{
      if (b43legacy_using_pio(dev) &&
          (dev->dev->id.revision < 3) &&
          (!(reason & B43legacy_IRQ_PIO_WORKAROUND))) {
            /* Apply a PIO specific workaround to the dma_reasons */
            pio_irq_workaround(dev, B43legacy_MMIO_PIO1_BASE, 0);
            pio_irq_workaround(dev, B43legacy_MMIO_PIO2_BASE, 1);
            pio_irq_workaround(dev, B43legacy_MMIO_PIO3_BASE, 2);
            pio_irq_workaround(dev, B43legacy_MMIO_PIO4_BASE, 3);
      }

      b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON, reason);

      b43legacy_write32(dev, B43legacy_MMIO_DMA0_REASON,
                    dev->dma_reason[0]);
      b43legacy_write32(dev, B43legacy_MMIO_DMA1_REASON,
                    dev->dma_reason[1]);
      b43legacy_write32(dev, B43legacy_MMIO_DMA2_REASON,
                    dev->dma_reason[2]);
      b43legacy_write32(dev, B43legacy_MMIO_DMA3_REASON,
                    dev->dma_reason[3]);
      b43legacy_write32(dev, B43legacy_MMIO_DMA4_REASON,
                    dev->dma_reason[4]);
      b43legacy_write32(dev, B43legacy_MMIO_DMA5_REASON,
                    dev->dma_reason[5]);
}

/* Interrupt handler top-half */
static irqreturn_t b43legacy_interrupt_handler(int irq, void *dev_id)
{
      irqreturn_t ret = IRQ_NONE;
      struct b43legacy_wldev *dev = dev_id;
      u32 reason;

      B43legacy_WARN_ON(!dev);

      spin_lock(&dev->wl->irq_lock);

      if (unlikely(b43legacy_status(dev) < B43legacy_STAT_STARTED))
            /* This can only happen on shared IRQ lines. */
            goto out;
      reason = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
      if (reason == 0xffffffff) /* shared IRQ */
            goto out;
      ret = IRQ_HANDLED;
      reason &= dev->irq_mask;
      if (!reason)
            goto out;

      dev->dma_reason[0] = b43legacy_read32(dev,
                                    B43legacy_MMIO_DMA0_REASON)
                                    & 0x0001DC00;
      dev->dma_reason[1] = b43legacy_read32(dev,
                                    B43legacy_MMIO_DMA1_REASON)
                                    & 0x0000DC00;
      dev->dma_reason[2] = b43legacy_read32(dev,
                                    B43legacy_MMIO_DMA2_REASON)
                                    & 0x0000DC00;
      dev->dma_reason[3] = b43legacy_read32(dev,
                                    B43legacy_MMIO_DMA3_REASON)
                                    & 0x0001DC00;
      dev->dma_reason[4] = b43legacy_read32(dev,
                                    B43legacy_MMIO_DMA4_REASON)
                                    & 0x0000DC00;
      dev->dma_reason[5] = b43legacy_read32(dev,
                                    B43legacy_MMIO_DMA5_REASON)
                                    & 0x0000DC00;

      b43legacy_interrupt_ack(dev, reason);
      /* Disable all IRQs. They are enabled again in the bottom half. */
      b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
      /* Save the reason code and call our bottom half. */
      dev->irq_reason = reason;
      tasklet_schedule(&dev->isr_tasklet);
out:
      mmiowb();
      spin_unlock(&dev->wl->irq_lock);

      return ret;
}

static void b43legacy_release_firmware(struct b43legacy_wldev *dev)
{
      release_firmware(dev->fw.ucode);
      dev->fw.ucode = NULL;
      release_firmware(dev->fw.pcm);
      dev->fw.pcm = NULL;
      release_firmware(dev->fw.initvals);
      dev->fw.initvals = NULL;
      release_firmware(dev->fw.initvals_band);
      dev->fw.initvals_band = NULL;
}

static void b43legacy_print_fw_helptext(struct b43legacy_wl *wl)
{
      b43legacyerr(wl, "You must go to http://linuxwireless.org/en/users/"
                 "Drivers/b43#devicefirmware "
                 "and download the correct firmware (version 3).\n");
}

static int do_request_fw(struct b43legacy_wldev *dev,
                   const char *name,
                   const struct firmware **fw)
{
      char path[sizeof(modparam_fwpostfix) + 32];
      struct b43legacy_fw_header *hdr;
      u32 size;
      int err;

      if (!name)
            return 0;

      snprintf(path, ARRAY_SIZE(path),
             "b43legacy%s/%s.fw",
             modparam_fwpostfix, name);
      err = request_firmware(fw, path, dev->dev->dev);
      if (err) {
            b43legacyerr(dev->wl, "Firmware file \"%s\" not found "
                   "or load failed.\n", path);
            return err;
      }
      if ((*fw)->size < sizeof(struct b43legacy_fw_header))
            goto err_format;
      hdr = (struct b43legacy_fw_header *)((*fw)->data);
      switch (hdr->type) {
      case B43legacy_FW_TYPE_UCODE:
      case B43legacy_FW_TYPE_PCM:
            size = be32_to_cpu(hdr->size);
            if (size != (*fw)->size - sizeof(struct b43legacy_fw_header))
                  goto err_format;
            /* fallthrough */
      case B43legacy_FW_TYPE_IV:
            if (hdr->ver != 1)
                  goto err_format;
            break;
      default:
            goto err_format;
      }

      return err;

err_format:
      b43legacyerr(dev->wl, "Firmware file \"%s\" format error.\n", path);
      return -EPROTO;
}

static int b43legacy_request_firmware(struct b43legacy_wldev *dev)
{
      struct b43legacy_firmware *fw = &dev->fw;
      const u8 rev = dev->dev->id.revision;
      const char *filename;
      u32 tmshigh;
      int err;

      tmshigh = ssb_read32(dev->dev, SSB_TMSHIGH);
      if (!fw->ucode) {
            if (rev == 2)
                  filename = "ucode2";
            else if (rev == 4)
                  filename = "ucode4";
            else
                  filename = "ucode5";
            err = do_request_fw(dev, filename, &fw->ucode);
            if (err)
                  goto err_load;
      }
      if (!fw->pcm) {
            if (rev < 5)
                  filename = "pcm4";
            else
                  filename = "pcm5";
            err = do_request_fw(dev, filename, &fw->pcm);
            if (err)
                  goto err_load;
      }
      if (!fw->initvals) {
            switch (dev->phy.type) {
            case B43legacy_PHYTYPE_B:
            case B43legacy_PHYTYPE_G:
                  if ((rev >= 5) && (rev <= 10))
                        filename = "b0g0initvals5";
                  else if (rev == 2 || rev == 4)
                        filename = "b0g0initvals2";
                  else
                        goto err_no_initvals;
                  break;
            default:
                  goto err_no_initvals;
            }
            err = do_request_fw(dev, filename, &fw->initvals);
            if (err)
                  goto err_load;
      }
      if (!fw->initvals_band) {
            switch (dev->phy.type) {
            case B43legacy_PHYTYPE_B:
            case B43legacy_PHYTYPE_G:
                  if ((rev >= 5) && (rev <= 10))
                        filename = "b0g0bsinitvals5";
                  else if (rev >= 11)
                        filename = NULL;
                  else if (rev == 2 || rev == 4)
                        filename = NULL;
                  else
                        goto err_no_initvals;
                  break;
            default:
                  goto err_no_initvals;
            }
            err = do_request_fw(dev, filename, &fw->initvals_band);
            if (err)
                  goto err_load;
      }

      return 0;

err_load:
      b43legacy_print_fw_helptext(dev->wl);
      goto error;

err_no_initvals:
      err = -ENODEV;
      b43legacyerr(dev->wl, "No Initial Values firmware file for PHY %u, "
             "core rev %u\n", dev->phy.type, rev);
      goto error;

error:
      b43legacy_release_firmware(dev);
      return err;
}

static int b43legacy_upload_microcode(struct b43legacy_wldev *dev)
{
      const size_t hdr_len = sizeof(struct b43legacy_fw_header);
      const __be32 *data;
      unsigned int i;
      unsigned int len;
      u16 fwrev;
      u16 fwpatch;
      u16 fwdate;
      u16 fwtime;
      u32 tmp, macctl;
      int err = 0;

      /* Jump the microcode PSM to offset 0 */
      macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
      B43legacy_WARN_ON(macctl & B43legacy_MACCTL_PSM_RUN);
      macctl |= B43legacy_MACCTL_PSM_JMP0;
      b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);
      /* Zero out all microcode PSM registers and shared memory. */
      for (i = 0; i < 64; i++)
            b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, i, 0);
      for (i = 0; i < 4096; i += 2)
            b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, i, 0);

      /* Upload Microcode. */
      data = (__be32 *) (dev->fw.ucode->data + hdr_len);
      len = (dev->fw.ucode->size - hdr_len) / sizeof(__be32);
      b43legacy_shm_control_word(dev,
                           B43legacy_SHM_UCODE |
                           B43legacy_SHM_AUTOINC_W,
                           0x0000);
      for (i = 0; i < len; i++) {
            b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA,
                            be32_to_cpu(data[i]));
            udelay(10);
      }

      if (dev->fw.pcm) {
            /* Upload PCM data. */
            data = (__be32 *) (dev->fw.pcm->data + hdr_len);
            len = (dev->fw.pcm->size - hdr_len) / sizeof(__be32);
            b43legacy_shm_control_word(dev, B43legacy_SHM_HW, 0x01EA);
            b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA, 0x00004000);
            /* No need for autoinc bit in SHM_HW */
            b43legacy_shm_control_word(dev, B43legacy_SHM_HW, 0x01EB);
            for (i = 0; i < len; i++) {
                  b43legacy_write32(dev, B43legacy_MMIO_SHM_DATA,
                                be32_to_cpu(data[i]));
                  udelay(10);
            }
      }

      b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON,
                    B43legacy_IRQ_ALL);

      /* Start the microcode PSM */
      macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
      macctl &= ~B43legacy_MACCTL_PSM_JMP0;
      macctl |= B43legacy_MACCTL_PSM_RUN;
      b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);

      /* Wait for the microcode to load and respond */
      i = 0;
      while (1) {
            tmp = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
            if (tmp == B43legacy_IRQ_MAC_SUSPENDED)
                  break;
            i++;
            if (i >= B43legacy_IRQWAIT_MAX_RETRIES) {
                  b43legacyerr(dev->wl, "Microcode not responding\n");
                  b43legacy_print_fw_helptext(dev->wl);
                  err = -ENODEV;
                  goto error;
            }
            msleep_interruptible(50);
            if (signal_pending(current)) {
                  err = -EINTR;
                  goto error;
            }
      }
      /* dummy read follows */
      b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);

      /* Get and check the revisions. */
      fwrev = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
                             B43legacy_SHM_SH_UCODEREV);
      fwpatch = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
                               B43legacy_SHM_SH_UCODEPATCH);
      fwdate = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
                              B43legacy_SHM_SH_UCODEDATE);
      fwtime = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
                              B43legacy_SHM_SH_UCODETIME);

      if (fwrev > 0x128) {
            b43legacyerr(dev->wl, "YOU ARE TRYING TO LOAD V4 FIRMWARE."
                       " Only firmware from binary drivers version 3.x"
                       " is supported. You must change your firmware"
                       " files.\n");
            b43legacy_print_fw_helptext(dev->wl);
            err = -EOPNOTSUPP;
            goto error;
      }
      b43legacyinfo(dev->wl, "Loading firmware version 0x%X, patch level %u "
                  "(20%.2i-%.2i-%.2i %.2i:%.2i:%.2i)\n", fwrev, fwpatch,
                  (fwdate >> 12) & 0xF, (fwdate >> 8) & 0xF, fwdate & 0xFF,
                  (fwtime >> 11) & 0x1F, (fwtime >> 5) & 0x3F,
                  fwtime & 0x1F);

      dev->fw.rev = fwrev;
      dev->fw.patch = fwpatch;

      return 0;

error:
      macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
      macctl &= ~B43legacy_MACCTL_PSM_RUN;
      macctl |= B43legacy_MACCTL_PSM_JMP0;
      b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);

      return err;
}

static int b43legacy_write_initvals(struct b43legacy_wldev *dev,
                            const struct b43legacy_iv *ivals,
                            size_t count,
                            size_t array_size)
{
      const struct b43legacy_iv *iv;
      u16 offset;
      size_t i;
      bool bit32;

      BUILD_BUG_ON(sizeof(struct b43legacy_iv) != 6);
      iv = ivals;
      for (i = 0; i < count; i++) {
            if (array_size < sizeof(iv->offset_size))
                  goto err_format;
            array_size -= sizeof(iv->offset_size);
            offset = be16_to_cpu(iv->offset_size);
            bit32 = !!(offset & B43legacy_IV_32BIT);
            offset &= B43legacy_IV_OFFSET_MASK;
            if (offset >= 0x1000)
                  goto err_format;
            if (bit32) {
                  u32 value;

                  if (array_size < sizeof(iv->data.d32))
                        goto err_format;
                  array_size -= sizeof(iv->data.d32);

                  value = get_unaligned_be32(&iv->data.d32);
                  b43legacy_write32(dev, offset, value);

                  iv = (const struct b43legacy_iv *)((const uint8_t *)iv +
                                          sizeof(__be16) +
                                          sizeof(__be32));
            } else {
                  u16 value;

                  if (array_size < sizeof(iv->data.d16))
                        goto err_format;
                  array_size -= sizeof(iv->data.d16);

                  value = be16_to_cpu(iv->data.d16);
                  b43legacy_write16(dev, offset, value);

                  iv = (const struct b43legacy_iv *)((const uint8_t *)iv +
                                          sizeof(__be16) +
                                          sizeof(__be16));
            }
      }
      if (array_size)
            goto err_format;

      return 0;

err_format:
      b43legacyerr(dev->wl, "Initial Values Firmware file-format error.\n");
      b43legacy_print_fw_helptext(dev->wl);

      return -EPROTO;
}

static int b43legacy_upload_initvals(struct b43legacy_wldev *dev)
{
      const size_t hdr_len = sizeof(struct b43legacy_fw_header);
      const struct b43legacy_fw_header *hdr;
      struct b43legacy_firmware *fw = &dev->fw;
      const struct b43legacy_iv *ivals;
      size_t count;
      int err;

      hdr = (const struct b43legacy_fw_header *)(fw->initvals->data);
      ivals = (const struct b43legacy_iv *)(fw->initvals->data + hdr_len);
      count = be32_to_cpu(hdr->size);
      err = b43legacy_write_initvals(dev, ivals, count,
                         fw->initvals->size - hdr_len);
      if (err)
            goto out;
      if (fw->initvals_band) {
            hdr = (const struct b43legacy_fw_header *)
                  (fw->initvals_band->data);
            ivals = (const struct b43legacy_iv *)(fw->initvals_band->data
                  + hdr_len);
            count = be32_to_cpu(hdr->size);
            err = b43legacy_write_initvals(dev, ivals, count,
                               fw->initvals_band->size - hdr_len);
            if (err)
                  goto out;
      }
out:

      return err;
}

/* Initialize the GPIOs
 * http://bcm-specs.sipsolutions.net/GPIO
 */
static int b43legacy_gpio_init(struct b43legacy_wldev *dev)
{
      struct ssb_bus *bus = dev->dev->bus;
      struct ssb_device *gpiodev, *pcidev = NULL;
      u32 mask;
      u32 set;

      b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
                    b43legacy_read32(dev,
                    B43legacy_MMIO_MACCTL)
                    & 0xFFFF3FFF);

      b43legacy_write16(dev, B43legacy_MMIO_GPIO_MASK,
                    b43legacy_read16(dev,
                    B43legacy_MMIO_GPIO_MASK)
                    | 0x000F);

      mask = 0x0000001F;
      set = 0x0000000F;
      if (dev->dev->bus->chip_id == 0x4301) {
            mask |= 0x0060;
            set |= 0x0060;
      }
      if (dev->dev->bus->sprom.boardflags_lo & B43legacy_BFL_PACTRL) {
            b43legacy_write16(dev, B43legacy_MMIO_GPIO_MASK,
                          b43legacy_read16(dev,
                          B43legacy_MMIO_GPIO_MASK)
                          | 0x0200);
            mask |= 0x0200;
            set |= 0x0200;
      }
      if (dev->dev->id.revision >= 2)
            mask  |= 0x0010; /* FIXME: This is redundant. */

#ifdef CONFIG_SSB_DRIVER_PCICORE
      pcidev = bus->pcicore.dev;
#endif
      gpiodev = bus->chipco.dev ? : pcidev;
      if (!gpiodev)
            return 0;
      ssb_write32(gpiodev, B43legacy_GPIO_CONTROL,
                (ssb_read32(gpiodev, B43legacy_GPIO_CONTROL)
                 & mask) | set);

      return 0;
}

/* Turn off all GPIO stuff. Call this on module unload, for example. */
static void b43legacy_gpio_cleanup(struct b43legacy_wldev *dev)
{
      struct ssb_bus *bus = dev->dev->bus;
      struct ssb_device *gpiodev, *pcidev = NULL;

#ifdef CONFIG_SSB_DRIVER_PCICORE
      pcidev = bus->pcicore.dev;
#endif
      gpiodev = bus->chipco.dev ? : pcidev;
      if (!gpiodev)
            return;
      ssb_write32(gpiodev, B43legacy_GPIO_CONTROL, 0);
}

/* http://bcm-specs.sipsolutions.net/EnableMac */
void b43legacy_mac_enable(struct b43legacy_wldev *dev)
{
      dev->mac_suspended--;
      B43legacy_WARN_ON(dev->mac_suspended < 0);
      B43legacy_WARN_ON(irqs_disabled());
      if (dev->mac_suspended == 0) {
            b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
                          b43legacy_read32(dev,
                          B43legacy_MMIO_MACCTL)
                          | B43legacy_MACCTL_ENABLED);
            b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON,
                          B43legacy_IRQ_MAC_SUSPENDED);
            /* the next two are dummy reads */
            b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
            b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
            b43legacy_power_saving_ctl_bits(dev, -1, -1);

            /* Re-enable IRQs. */
            spin_lock_irq(&dev->wl->irq_lock);
            b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK,
                          dev->irq_mask);
            spin_unlock_irq(&dev->wl->irq_lock);
      }
}

/* http://bcm-specs.sipsolutions.net/SuspendMAC */
void b43legacy_mac_suspend(struct b43legacy_wldev *dev)
{
      int i;
      u32 tmp;

      might_sleep();
      B43legacy_WARN_ON(irqs_disabled());
      B43legacy_WARN_ON(dev->mac_suspended < 0);

      if (dev->mac_suspended == 0) {
            /* Mask IRQs before suspending MAC. Otherwise
             * the MAC stays busy and won't suspend. */
            spin_lock_irq(&dev->wl->irq_lock);
            b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
            spin_unlock_irq(&dev->wl->irq_lock);
            b43legacy_synchronize_irq(dev);

            b43legacy_power_saving_ctl_bits(dev, -1, 1);
            b43legacy_write32(dev, B43legacy_MMIO_MACCTL,
                          b43legacy_read32(dev,
                          B43legacy_MMIO_MACCTL)
                          & ~B43legacy_MACCTL_ENABLED);
            b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
            for (i = 40; i; i--) {
                  tmp = b43legacy_read32(dev,
                                     B43legacy_MMIO_GEN_IRQ_REASON);
                  if (tmp & B43legacy_IRQ_MAC_SUSPENDED)
                        goto out;
                  msleep(1);
            }
            b43legacyerr(dev->wl, "MAC suspend failed\n");
      }
out:
      dev->mac_suspended++;
}

static void b43legacy_adjust_opmode(struct b43legacy_wldev *dev)
{
      struct b43legacy_wl *wl = dev->wl;
      u32 ctl;
      u16 cfp_pretbtt;

      ctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
      /* Reset status to STA infrastructure mode. */
      ctl &= ~B43legacy_MACCTL_AP;
      ctl &= ~B43legacy_MACCTL_KEEP_CTL;
      ctl &= ~B43legacy_MACCTL_KEEP_BADPLCP;
      ctl &= ~B43legacy_MACCTL_KEEP_BAD;
      ctl &= ~B43legacy_MACCTL_PROMISC;
      ctl &= ~B43legacy_MACCTL_BEACPROMISC;
      ctl |= B43legacy_MACCTL_INFRA;

      if (b43legacy_is_mode(wl, NL80211_IFTYPE_AP))
            ctl |= B43legacy_MACCTL_AP;
      else if (b43legacy_is_mode(wl, NL80211_IFTYPE_ADHOC))
            ctl &= ~B43legacy_MACCTL_INFRA;

      if (wl->filter_flags & FIF_CONTROL)
            ctl |= B43legacy_MACCTL_KEEP_CTL;
      if (wl->filter_flags & FIF_FCSFAIL)
            ctl |= B43legacy_MACCTL_KEEP_BAD;
      if (wl->filter_flags & FIF_PLCPFAIL)
            ctl |= B43legacy_MACCTL_KEEP_BADPLCP;
      if (wl->filter_flags & FIF_PROMISC_IN_BSS)
            ctl |= B43legacy_MACCTL_PROMISC;
      if (wl->filter_flags & FIF_BCN_PRBRESP_PROMISC)
            ctl |= B43legacy_MACCTL_BEACPROMISC;

      /* Workaround: On old hardware the HW-MAC-address-filter
       * doesn't work properly, so always run promisc in filter
       * it in software. */
      if (dev->dev->id.revision <= 4)
            ctl |= B43legacy_MACCTL_PROMISC;

      b43legacy_write32(dev, B43legacy_MMIO_MACCTL, ctl);

      cfp_pretbtt = 2;
      if ((ctl & B43legacy_MACCTL_INFRA) &&
          !(ctl & B43legacy_MACCTL_AP)) {
            if (dev->dev->bus->chip_id == 0x4306 &&
                dev->dev->bus->chip_rev == 3)
                  cfp_pretbtt = 100;
            else
                  cfp_pretbtt = 50;
      }
      b43legacy_write16(dev, 0x612, cfp_pretbtt);
}

static void b43legacy_rate_memory_write(struct b43legacy_wldev *dev,
                              u16 rate,
                              int is_ofdm)
{
      u16 offset;

      if (is_ofdm) {
            offset = 0x480;
            offset += (b43legacy_plcp_get_ratecode_ofdm(rate) & 0x000F) * 2;
      } else {
            offset = 0x4C0;
            offset += (b43legacy_plcp_get_ratecode_cck(rate) & 0x000F) * 2;
      }
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, offset + 0x20,
                        b43legacy_shm_read16(dev,
                        B43legacy_SHM_SHARED, offset));
}

static void b43legacy_rate_memory_init(struct b43legacy_wldev *dev)
{
      switch (dev->phy.type) {
      case B43legacy_PHYTYPE_G:
            b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_6MB, 1);
            b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_12MB, 1);
            b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_18MB, 1);
            b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_24MB, 1);
            b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_36MB, 1);
            b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_48MB, 1);
            b43legacy_rate_memory_write(dev, B43legacy_OFDM_RATE_54MB, 1);
            /* fallthrough */
      case B43legacy_PHYTYPE_B:
            b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_1MB, 0);
            b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_2MB, 0);
            b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_5MB, 0);
            b43legacy_rate_memory_write(dev, B43legacy_CCK_RATE_11MB, 0);
            break;
      default:
            B43legacy_BUG_ON(1);
      }
}

/* Set the TX-Antenna for management frames sent by firmware. */
static void b43legacy_mgmtframe_txantenna(struct b43legacy_wldev *dev,
                                int antenna)
{
      u16 ant = 0;
      u16 tmp;

      switch (antenna) {
      case B43legacy_ANTENNA0:
            ant |= B43legacy_TX4_PHY_ANT0;
            break;
      case B43legacy_ANTENNA1:
            ant |= B43legacy_TX4_PHY_ANT1;
            break;
      case B43legacy_ANTENNA_AUTO:
            ant |= B43legacy_TX4_PHY_ANTLAST;
            break;
      default:
            B43legacy_BUG_ON(1);
      }

      /* FIXME We also need to set the other flags of the PHY control
       * field somewhere. */

      /* For Beacons */
      tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
                           B43legacy_SHM_SH_BEACPHYCTL);
      tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
                        B43legacy_SHM_SH_BEACPHYCTL, tmp);
      /* For ACK/CTS */
      tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
                           B43legacy_SHM_SH_ACKCTSPHYCTL);
      tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
                        B43legacy_SHM_SH_ACKCTSPHYCTL, tmp);
      /* For Probe Resposes */
      tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
                           B43legacy_SHM_SH_PRPHYCTL);
      tmp = (tmp & ~B43legacy_TX4_PHY_ANT) | ant;
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
                        B43legacy_SHM_SH_PRPHYCTL, tmp);
}

/* This is the opposite of b43legacy_chip_init() */
static void b43legacy_chip_exit(struct b43legacy_wldev *dev)
{
      b43legacy_radio_turn_off(dev, 1);
      b43legacy_gpio_cleanup(dev);
      /* firmware is released later */
}

/* Initialize the chip
 * http://bcm-specs.sipsolutions.net/ChipInit
 */
static int b43legacy_chip_init(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;
      int err;
      int tmp;
      u32 value32, macctl;
      u16 value16;

      /* Initialize the MAC control */
      macctl = B43legacy_MACCTL_IHR_ENABLED | B43legacy_MACCTL_SHM_ENABLED;
      if (dev->phy.gmode)
            macctl |= B43legacy_MACCTL_GMODE;
      macctl |= B43legacy_MACCTL_INFRA;
      b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);

      err = b43legacy_request_firmware(dev);
      if (err)
            goto out;
      err = b43legacy_upload_microcode(dev);
      if (err)
            goto out; /* firmware is released later */

      err = b43legacy_gpio_init(dev);
      if (err)
            goto out; /* firmware is released later */

      err = b43legacy_upload_initvals(dev);
      if (err)
            goto err_gpio_clean;
      b43legacy_radio_turn_on(dev);

      b43legacy_write16(dev, 0x03E6, 0x0000);
      err = b43legacy_phy_init(dev);
      if (err)
            goto err_radio_off;

      /* Select initial Interference Mitigation. */
      tmp = phy->interfmode;
      phy->interfmode = B43legacy_INTERFMODE_NONE;
      b43legacy_radio_set_interference_mitigation(dev, tmp);

      b43legacy_phy_set_antenna_diversity(dev);
      b43legacy_mgmtframe_txantenna(dev, B43legacy_ANTENNA_DEFAULT);

      if (phy->type == B43legacy_PHYTYPE_B) {
            value16 = b43legacy_read16(dev, 0x005E);
            value16 |= 0x0004;
            b43legacy_write16(dev, 0x005E, value16);
      }
      b43legacy_write32(dev, 0x0100, 0x01000000);
      if (dev->dev->id.revision < 5)
            b43legacy_write32(dev, 0x010C, 0x01000000);

      value32 = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
      value32 &= ~B43legacy_MACCTL_INFRA;
      b43legacy_write32(dev, B43legacy_MMIO_MACCTL, value32);
      value32 = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
      value32 |= B43legacy_MACCTL_INFRA;
      b43legacy_write32(dev, B43legacy_MMIO_MACCTL, value32);

      if (b43legacy_using_pio(dev)) {
            b43legacy_write32(dev, 0x0210, 0x00000100);
            b43legacy_write32(dev, 0x0230, 0x00000100);
            b43legacy_write32(dev, 0x0250, 0x00000100);
            b43legacy_write32(dev, 0x0270, 0x00000100);
            b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0034,
                              0x0000);
      }

      /* Probe Response Timeout value */
      /* FIXME: Default to 0, has to be set by ioctl probably... :-/ */
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0074, 0x0000);

      /* Initially set the wireless operation mode. */
      b43legacy_adjust_opmode(dev);

      if (dev->dev->id.revision < 3) {
            b43legacy_write16(dev, 0x060E, 0x0000);
            b43legacy_write16(dev, 0x0610, 0x8000);
            b43legacy_write16(dev, 0x0604, 0x0000);
            b43legacy_write16(dev, 0x0606, 0x0200);
      } else {
            b43legacy_write32(dev, 0x0188, 0x80000000);
            b43legacy_write32(dev, 0x018C, 0x02000000);
      }
      b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_REASON, 0x00004000);
      b43legacy_write32(dev, B43legacy_MMIO_DMA0_IRQ_MASK, 0x0001DC00);
      b43legacy_write32(dev, B43legacy_MMIO_DMA1_IRQ_MASK, 0x0000DC00);
      b43legacy_write32(dev, B43legacy_MMIO_DMA2_IRQ_MASK, 0x0000DC00);
      b43legacy_write32(dev, B43legacy_MMIO_DMA3_IRQ_MASK, 0x0001DC00);
      b43legacy_write32(dev, B43legacy_MMIO_DMA4_IRQ_MASK, 0x0000DC00);
      b43legacy_write32(dev, B43legacy_MMIO_DMA5_IRQ_MASK, 0x0000DC00);

      value32 = ssb_read32(dev->dev, SSB_TMSLOW);
      value32 |= 0x00100000;
      ssb_write32(dev->dev, SSB_TMSLOW, value32);

      b43legacy_write16(dev, B43legacy_MMIO_POWERUP_DELAY,
                    dev->dev->bus->chipco.fast_pwrup_delay);

      /* PHY TX errors counter. */
      atomic_set(&phy->txerr_cnt, B43legacy_PHY_TX_BADNESS_LIMIT);

      B43legacy_WARN_ON(err != 0);
      b43legacydbg(dev->wl, "Chip initialized\n");
out:
      return err;

err_radio_off:
      b43legacy_radio_turn_off(dev, 1);
err_gpio_clean:
      b43legacy_gpio_cleanup(dev);
      goto out;
}

static void b43legacy_periodic_every120sec(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;

      if (phy->type != B43legacy_PHYTYPE_G || phy->rev < 2)
            return;

      b43legacy_mac_suspend(dev);
      b43legacy_phy_lo_g_measure(dev);
      b43legacy_mac_enable(dev);
}

static void b43legacy_periodic_every60sec(struct b43legacy_wldev *dev)
{
      b43legacy_phy_lo_mark_all_unused(dev);
      if (dev->dev->bus->sprom.boardflags_lo & B43legacy_BFL_RSSI) {
            b43legacy_mac_suspend(dev);
            b43legacy_calc_nrssi_slope(dev);
            b43legacy_mac_enable(dev);
      }
}

static void b43legacy_periodic_every30sec(struct b43legacy_wldev *dev)
{
      /* Update device statistics. */
      b43legacy_calculate_link_quality(dev);
}

static void b43legacy_periodic_every15sec(struct b43legacy_wldev *dev)
{
      b43legacy_phy_xmitpower(dev); /* FIXME: unless scanning? */

      atomic_set(&dev->phy.txerr_cnt, B43legacy_PHY_TX_BADNESS_LIMIT);
      wmb();
}

static void do_periodic_work(struct b43legacy_wldev *dev)
{
      unsigned int state;

      state = dev->periodic_state;
      if (state % 8 == 0)
            b43legacy_periodic_every120sec(dev);
      if (state % 4 == 0)
            b43legacy_periodic_every60sec(dev);
      if (state % 2 == 0)
            b43legacy_periodic_every30sec(dev);
      b43legacy_periodic_every15sec(dev);
}

/* Periodic work locking policy:
 *    The whole periodic work handler is protected by
 *    wl->mutex. If another lock is needed somewhere in the
 *    pwork callchain, it's aquired in-place, where it's needed.
 */
static void b43legacy_periodic_work_handler(struct work_struct *work)
{
      struct b43legacy_wldev *dev = container_of(work, struct b43legacy_wldev,
                                   periodic_work.work);
      struct b43legacy_wl *wl = dev->wl;
      unsigned long delay;

      mutex_lock(&wl->mutex);

      if (unlikely(b43legacy_status(dev) != B43legacy_STAT_STARTED))
            goto out;
      if (b43legacy_debug(dev, B43legacy_DBG_PWORK_STOP))
            goto out_requeue;

      do_periodic_work(dev);

      dev->periodic_state++;
out_requeue:
      if (b43legacy_debug(dev, B43legacy_DBG_PWORK_FAST))
            delay = msecs_to_jiffies(50);
      else
            delay = round_jiffies_relative(HZ * 15);
      queue_delayed_work(wl->hw->workqueue, &dev->periodic_work, delay);
out:
      mutex_unlock(&wl->mutex);
}

static void b43legacy_periodic_tasks_setup(struct b43legacy_wldev *dev)
{
      struct delayed_work *work = &dev->periodic_work;

      dev->periodic_state = 0;
      INIT_DELAYED_WORK(work, b43legacy_periodic_work_handler);
      queue_delayed_work(dev->wl->hw->workqueue, work, 0);
}

/* Validate access to the chip (SHM) */
static int b43legacy_validate_chipaccess(struct b43legacy_wldev *dev)
{
      u32 value;
      u32 shm_backup;

      shm_backup = b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0);
      b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, 0xAA5555AA);
      if (b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0) !=
                         0xAA5555AA)
            goto error;
      b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, 0x55AAAA55);
      if (b43legacy_shm_read32(dev, B43legacy_SHM_SHARED, 0) !=
                         0x55AAAA55)
            goto error;
      b43legacy_shm_write32(dev, B43legacy_SHM_SHARED, 0, shm_backup);

      value = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
      if ((value | B43legacy_MACCTL_GMODE) !=
          (B43legacy_MACCTL_GMODE | B43legacy_MACCTL_IHR_ENABLED))
            goto error;

      value = b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_REASON);
      if (value)
            goto error;

      return 0;
error:
      b43legacyerr(dev->wl, "Failed to validate the chipaccess\n");
      return -ENODEV;
}

static void b43legacy_security_init(struct b43legacy_wldev *dev)
{
      dev->max_nr_keys = (dev->dev->id.revision >= 5) ? 58 : 20;
      B43legacy_WARN_ON(dev->max_nr_keys > ARRAY_SIZE(dev->key));
      dev->ktp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
                              0x0056);
      /* KTP is a word address, but we address SHM bytewise.
       * So multiply by two.
       */
      dev->ktp *= 2;
      if (dev->dev->id.revision >= 5)
            /* Number of RCMTA address slots */
            b43legacy_write16(dev, B43legacy_MMIO_RCMTA_COUNT,
                          dev->max_nr_keys - 8);
}

#ifdef CONFIG_B43LEGACY_HWRNG
static int b43legacy_rng_read(struct hwrng *rng, u32 *data)
{
      struct b43legacy_wl *wl = (struct b43legacy_wl *)rng->priv;
      unsigned long flags;

      /* Don't take wl->mutex here, as it could deadlock with
       * hwrng internal locking. It's not needed to take
       * wl->mutex here, anyway. */

      spin_lock_irqsave(&wl->irq_lock, flags);
      *data = b43legacy_read16(wl->current_dev, B43legacy_MMIO_RNG);
      spin_unlock_irqrestore(&wl->irq_lock, flags);

      return (sizeof(u16));
}
#endif

static void b43legacy_rng_exit(struct b43legacy_wl *wl)
{
#ifdef CONFIG_B43LEGACY_HWRNG
      if (wl->rng_initialized)
            hwrng_unregister(&wl->rng);
#endif
}

static int b43legacy_rng_init(struct b43legacy_wl *wl)
{
      int err = 0;

#ifdef CONFIG_B43LEGACY_HWRNG
      snprintf(wl->rng_name, ARRAY_SIZE(wl->rng_name),
             "%s_%s", KBUILD_MODNAME, wiphy_name(wl->hw->wiphy));
      wl->rng.name = wl->rng_name;
      wl->rng.data_read = b43legacy_rng_read;
      wl->rng.priv = (unsigned long)wl;
      wl->rng_initialized = 1;
      err = hwrng_register(&wl->rng);
      if (err) {
            wl->rng_initialized = 0;
            b43legacyerr(wl, "Failed to register the random "
                   "number generator (%d)\n", err);
      }

#endif
      return err;
}

static int b43legacy_op_tx(struct ieee80211_hw *hw,
                     struct sk_buff *skb)
{
      struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
      struct b43legacy_wldev *dev = wl->current_dev;
      int err = -ENODEV;
      unsigned long flags;

      if (unlikely(!dev))
            goto out;
      if (unlikely(b43legacy_status(dev) < B43legacy_STAT_STARTED))
            goto out;
      /* DMA-TX is done without a global lock. */
      if (b43legacy_using_pio(dev)) {
            spin_lock_irqsave(&wl->irq_lock, flags);
            err = b43legacy_pio_tx(dev, skb);
            spin_unlock_irqrestore(&wl->irq_lock, flags);
      } else
            err = b43legacy_dma_tx(dev, skb);
out:
      if (unlikely(err)) {
            /* Drop the packet. */
            dev_kfree_skb_any(skb);
      }
      return NETDEV_TX_OK;
}

static int b43legacy_op_conf_tx(struct ieee80211_hw *hw, u16 queue,
                        const struct ieee80211_tx_queue_params *params)
{
      return 0;
}

static int b43legacy_op_get_tx_stats(struct ieee80211_hw *hw,
                             struct ieee80211_tx_queue_stats *stats)
{
      struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
      struct b43legacy_wldev *dev = wl->current_dev;
      unsigned long flags;
      int err = -ENODEV;

      if (!dev)
            goto out;
      spin_lock_irqsave(&wl->irq_lock, flags);
      if (likely(b43legacy_status(dev) >= B43legacy_STAT_STARTED)) {
            if (b43legacy_using_pio(dev))
                  b43legacy_pio_get_tx_stats(dev, stats);
            else
                  b43legacy_dma_get_tx_stats(dev, stats);
            err = 0;
      }
      spin_unlock_irqrestore(&wl->irq_lock, flags);
out:
      return err;
}

static int b43legacy_op_get_stats(struct ieee80211_hw *hw,
                          struct ieee80211_low_level_stats *stats)
{
      struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
      unsigned long flags;

      spin_lock_irqsave(&wl->irq_lock, flags);
      memcpy(stats, &wl->ieee_stats, sizeof(*stats));
      spin_unlock_irqrestore(&wl->irq_lock, flags);

      return 0;
}

static const char *phymode_to_string(unsigned int phymode)
{
      switch (phymode) {
      case B43legacy_PHYMODE_B:
            return "B";
      case B43legacy_PHYMODE_G:
            return "G";
      default:
            B43legacy_BUG_ON(1);
      }
      return "";
}

static int find_wldev_for_phymode(struct b43legacy_wl *wl,
                          unsigned int phymode,
                          struct b43legacy_wldev **dev,
                          bool *gmode)
{
      struct b43legacy_wldev *d;

      list_for_each_entry(d, &wl->devlist, list) {
            if (d->phy.possible_phymodes & phymode) {
                  /* Ok, this device supports the PHY-mode.
                   * Set the gmode bit. */
                  *gmode = 1;
                  *dev = d;

                  return 0;
            }
      }

      return -ESRCH;
}

static void b43legacy_put_phy_into_reset(struct b43legacy_wldev *dev)
{
      struct ssb_device *sdev = dev->dev;
      u32 tmslow;

      tmslow = ssb_read32(sdev, SSB_TMSLOW);
      tmslow &= ~B43legacy_TMSLOW_GMODE;
      tmslow |= B43legacy_TMSLOW_PHYRESET;
      tmslow |= SSB_TMSLOW_FGC;
      ssb_write32(sdev, SSB_TMSLOW, tmslow);
      msleep(1);

      tmslow = ssb_read32(sdev, SSB_TMSLOW);
      tmslow &= ~SSB_TMSLOW_FGC;
      tmslow |= B43legacy_TMSLOW_PHYRESET;
      ssb_write32(sdev, SSB_TMSLOW, tmslow);
      msleep(1);
}

/* Expects wl->mutex locked */
static int b43legacy_switch_phymode(struct b43legacy_wl *wl,
                              unsigned int new_mode)
{
      struct b43legacy_wldev *uninitialized_var(up_dev);
      struct b43legacy_wldev *down_dev;
      int err;
      bool gmode = 0;
      int prev_status;

      err = find_wldev_for_phymode(wl, new_mode, &up_dev, &gmode);
      if (err) {
            b43legacyerr(wl, "Could not find a device for %s-PHY mode\n",
                   phymode_to_string(new_mode));
            return err;
      }
      if ((up_dev == wl->current_dev) &&
          (!!wl->current_dev->phy.gmode == !!gmode))
            /* This device is already running. */
            return 0;
      b43legacydbg(wl, "Reconfiguring PHYmode to %s-PHY\n",
             phymode_to_string(new_mode));
      down_dev = wl->current_dev;

      prev_status = b43legacy_status(down_dev);
      /* Shutdown the currently running core. */
      if (prev_status >= B43legacy_STAT_STARTED)
            b43legacy_wireless_core_stop(down_dev);
      if (prev_status >= B43legacy_STAT_INITIALIZED)
            b43legacy_wireless_core_exit(down_dev);

      if (down_dev != up_dev)
            /* We switch to a different core, so we put PHY into
             * RESET on the old core. */
            b43legacy_put_phy_into_reset(down_dev);

      /* Now start the new core. */
      up_dev->phy.gmode = gmode;
      if (prev_status >= B43legacy_STAT_INITIALIZED) {
            err = b43legacy_wireless_core_init(up_dev);
            if (err) {
                  b43legacyerr(wl, "Fatal: Could not initialize device"
                             " for newly selected %s-PHY mode\n",
                             phymode_to_string(new_mode));
                  goto init_failure;
            }
      }
      if (prev_status >= B43legacy_STAT_STARTED) {
            err = b43legacy_wireless_core_start(up_dev);
            if (err) {
                  b43legacyerr(wl, "Fatal: Coult not start device for "
                         "newly selected %s-PHY mode\n",
                         phymode_to_string(new_mode));
                  b43legacy_wireless_core_exit(up_dev);
                  goto init_failure;
            }
      }
      B43legacy_WARN_ON(b43legacy_status(up_dev) != prev_status);

      b43legacy_shm_write32(up_dev, B43legacy_SHM_SHARED, 0x003E, 0);

      wl->current_dev = up_dev;

      return 0;
init_failure:
      /* Whoops, failed to init the new core. No core is operating now. */
      wl->current_dev = NULL;
      return err;
}

/* Write the short and long frame retry limit values. */
static void b43legacy_set_retry_limits(struct b43legacy_wldev *dev,
                               unsigned int short_retry,
                               unsigned int long_retry)
{
      /* The retry limit is a 4-bit counter. Enforce this to avoid overflowing
       * the chip-internal counter. */
      short_retry = min(short_retry, (unsigned int)0xF);
      long_retry = min(long_retry, (unsigned int)0xF);

      b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0006, short_retry);
      b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS, 0x0007, long_retry);
}

static int b43legacy_op_dev_config(struct ieee80211_hw *hw,
                           u32 changed)
{
      struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
      struct b43legacy_wldev *dev;
      struct b43legacy_phy *phy;
      struct ieee80211_conf *conf = &hw->conf;
      unsigned long flags;
      unsigned int new_phymode = 0xFFFF;
      int antenna_tx;
      int antenna_rx;
      int err = 0;

      antenna_tx = B43legacy_ANTENNA_DEFAULT;
      antenna_rx = B43legacy_ANTENNA_DEFAULT;

      mutex_lock(&wl->mutex);
      dev = wl->current_dev;
      phy = &dev->phy;

      if (changed & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
            b43legacy_set_retry_limits(dev,
                                 conf->short_frame_max_tx_count,
                                 conf->long_frame_max_tx_count);
      changed &= ~IEEE80211_CONF_CHANGE_RETRY_LIMITS;
      if (!changed)
            goto out_unlock_mutex;

      /* Switch the PHY mode (if necessary). */
      switch (conf->channel->band) {
      case IEEE80211_BAND_2GHZ:
            if (phy->type == B43legacy_PHYTYPE_B)
                  new_phymode = B43legacy_PHYMODE_B;
            else
                  new_phymode = B43legacy_PHYMODE_G;
            break;
      default:
            B43legacy_WARN_ON(1);
      }
      err = b43legacy_switch_phymode(wl, new_phymode);
      if (err)
            goto out_unlock_mutex;

      /* Disable IRQs while reconfiguring the device.
       * This makes it possible to drop the spinlock throughout
       * the reconfiguration process. */
      spin_lock_irqsave(&wl->irq_lock, flags);
      if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
            spin_unlock_irqrestore(&wl->irq_lock, flags);
            goto out_unlock_mutex;
      }
      b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
      spin_unlock_irqrestore(&wl->irq_lock, flags);
      b43legacy_synchronize_irq(dev);

      /* Switch to the requested channel.
       * The firmware takes care of races with the TX handler. */
      if (conf->channel->hw_value != phy->channel)
            b43legacy_radio_selectchannel(dev, conf->channel->hw_value, 0);

      dev->wl->radiotap_enabled = !!(conf->flags & IEEE80211_CONF_RADIOTAP);

      /* Adjust the desired TX power level. */
      if (conf->power_level != 0) {
            if (conf->power_level != phy->power_level) {
                  phy->power_level = conf->power_level;
                  b43legacy_phy_xmitpower(dev);
            }
      }

      /* Antennas for RX and management frame TX. */
      b43legacy_mgmtframe_txantenna(dev, antenna_tx);

      if (wl->radio_enabled != phy->radio_on) {
            if (wl->radio_enabled) {
                  b43legacy_radio_turn_on(dev);
                  b43legacyinfo(dev->wl, "Radio turned on by software\n");
                  if (!dev->radio_hw_enable)
                        b43legacyinfo(dev->wl, "The hardware RF-kill"
                                    " button still turns the radio"
                                    " physically off. Press the"
                                    " button to turn it on.\n");
            } else {
                  b43legacy_radio_turn_off(dev, 0);
                  b43legacyinfo(dev->wl, "Radio turned off by"
                              " software\n");
            }
      }

      spin_lock_irqsave(&wl->irq_lock, flags);
      b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
      mmiowb();
      spin_unlock_irqrestore(&wl->irq_lock, flags);
out_unlock_mutex:
      mutex_unlock(&wl->mutex);

      return err;
}

static void b43legacy_update_basic_rates(struct b43legacy_wldev *dev, u32 brates)
{
      struct ieee80211_supported_band *sband =
            dev->wl->hw->wiphy->bands[IEEE80211_BAND_2GHZ];
      struct ieee80211_rate *rate;
      int i;
      u16 basic, direct, offset, basic_offset, rateptr;

      for (i = 0; i < sband->n_bitrates; i++) {
            rate = &sband->bitrates[i];

            if (b43legacy_is_cck_rate(rate->hw_value)) {
                  direct = B43legacy_SHM_SH_CCKDIRECT;
                  basic = B43legacy_SHM_SH_CCKBASIC;
                  offset = b43legacy_plcp_get_ratecode_cck(rate->hw_value);
                  offset &= 0xF;
            } else {
                  direct = B43legacy_SHM_SH_OFDMDIRECT;
                  basic = B43legacy_SHM_SH_OFDMBASIC;
                  offset = b43legacy_plcp_get_ratecode_ofdm(rate->hw_value);
                  offset &= 0xF;
            }

            rate = ieee80211_get_response_rate(sband, brates, rate->bitrate);

            if (b43legacy_is_cck_rate(rate->hw_value)) {
                  basic_offset = b43legacy_plcp_get_ratecode_cck(rate->hw_value);
                  basic_offset &= 0xF;
            } else {
                  basic_offset = b43legacy_plcp_get_ratecode_ofdm(rate->hw_value);
                  basic_offset &= 0xF;
            }

            /*
             * Get the pointer that we need to point to
             * from the direct map
             */
            rateptr = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
                                     direct + 2 * basic_offset);
            /* and write it to the basic map */
            b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
                              basic + 2 * offset, rateptr);
      }
}

static void b43legacy_op_bss_info_changed(struct ieee80211_hw *hw,
                            struct ieee80211_vif *vif,
                            struct ieee80211_bss_conf *conf,
                            u32 changed)
{
      struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
      struct b43legacy_wldev *dev;
      struct b43legacy_phy *phy;
      unsigned long flags;

      mutex_lock(&wl->mutex);
      B43legacy_WARN_ON(wl->vif != vif);

      dev = wl->current_dev;
      phy = &dev->phy;

      /* Disable IRQs while reconfiguring the device.
       * This makes it possible to drop the spinlock throughout
       * the reconfiguration process. */
      spin_lock_irqsave(&wl->irq_lock, flags);
      if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
            spin_unlock_irqrestore(&wl->irq_lock, flags);
            goto out_unlock_mutex;
      }
      b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);

      if (changed & BSS_CHANGED_BSSID) {
            b43legacy_synchronize_irq(dev);

            if (conf->bssid)
                  memcpy(wl->bssid, conf->bssid, ETH_ALEN);
            else
                  memset(wl->bssid, 0, ETH_ALEN);
      }

      if (b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED) {
            if (changed & BSS_CHANGED_BEACON &&
                (b43legacy_is_mode(wl, NL80211_IFTYPE_AP) ||
                 b43legacy_is_mode(wl, NL80211_IFTYPE_ADHOC)))
                  b43legacy_update_templates(wl);

            if (changed & BSS_CHANGED_BSSID)
                  b43legacy_write_mac_bssid_templates(dev);
      }
      spin_unlock_irqrestore(&wl->irq_lock, flags);

      b43legacy_mac_suspend(dev);

      if (changed & BSS_CHANGED_BEACON_INT &&
          (b43legacy_is_mode(wl, NL80211_IFTYPE_AP) ||
           b43legacy_is_mode(wl, NL80211_IFTYPE_ADHOC)))
            b43legacy_set_beacon_int(dev, conf->beacon_int);

      if (changed & BSS_CHANGED_BASIC_RATES)
            b43legacy_update_basic_rates(dev, conf->basic_rates);

      if (changed & BSS_CHANGED_ERP_SLOT) {
            if (conf->use_short_slot)
                  b43legacy_short_slot_timing_enable(dev);
            else
                  b43legacy_short_slot_timing_disable(dev);
      }

      b43legacy_mac_enable(dev);

      spin_lock_irqsave(&wl->irq_lock, flags);
      b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);
      /* XXX: why? */
      mmiowb();
      spin_unlock_irqrestore(&wl->irq_lock, flags);
 out_unlock_mutex:
      mutex_unlock(&wl->mutex);
}

static void b43legacy_op_configure_filter(struct ieee80211_hw *hw,
                                unsigned int changed,
                                unsigned int *fflags,
                                int mc_count,
                                struct dev_addr_list *mc_list)
{
      struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
      struct b43legacy_wldev *dev = wl->current_dev;
      unsigned long flags;

      if (!dev) {
            *fflags = 0;
            return;
      }

      spin_lock_irqsave(&wl->irq_lock, flags);
      *fflags &= FIF_PROMISC_IN_BSS |
              FIF_ALLMULTI |
              FIF_FCSFAIL |
              FIF_PLCPFAIL |
              FIF_CONTROL |
              FIF_OTHER_BSS |
              FIF_BCN_PRBRESP_PROMISC;

      changed &= FIF_PROMISC_IN_BSS |
               FIF_ALLMULTI |
               FIF_FCSFAIL |
               FIF_PLCPFAIL |
               FIF_CONTROL |
               FIF_OTHER_BSS |
               FIF_BCN_PRBRESP_PROMISC;

      wl->filter_flags = *fflags;

      if (changed && b43legacy_status(dev) >= B43legacy_STAT_INITIALIZED)
            b43legacy_adjust_opmode(dev);
      spin_unlock_irqrestore(&wl->irq_lock, flags);
}

/* Locking: wl->mutex */
static void b43legacy_wireless_core_stop(struct b43legacy_wldev *dev)
{
      struct b43legacy_wl *wl = dev->wl;
      unsigned long flags;

      if (b43legacy_status(dev) < B43legacy_STAT_STARTED)
            return;

      /* Disable and sync interrupts. We must do this before than
       * setting the status to INITIALIZED, as the interrupt handler
       * won't care about IRQs then. */
      spin_lock_irqsave(&wl->irq_lock, flags);
      b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, 0);
      b43legacy_read32(dev, B43legacy_MMIO_GEN_IRQ_MASK); /* flush */
      spin_unlock_irqrestore(&wl->irq_lock, flags);
      b43legacy_synchronize_irq(dev);

      b43legacy_set_status(dev, B43legacy_STAT_INITIALIZED);

      mutex_unlock(&wl->mutex);
      /* Must unlock as it would otherwise deadlock. No races here.
       * Cancel the possibly running self-rearming periodic work. */
      cancel_delayed_work_sync(&dev->periodic_work);
      mutex_lock(&wl->mutex);

      ieee80211_stop_queues(wl->hw); /* FIXME this could cause a deadlock */

      b43legacy_mac_suspend(dev);
      free_irq(dev->dev->irq, dev);
      b43legacydbg(wl, "Wireless interface stopped\n");
}

/* Locking: wl->mutex */
static int b43legacy_wireless_core_start(struct b43legacy_wldev *dev)
{
      int err;

      B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_INITIALIZED);

      drain_txstatus_queue(dev);
      err = request_irq(dev->dev->irq, b43legacy_interrupt_handler,
                    IRQF_SHARED, KBUILD_MODNAME, dev);
      if (err) {
            b43legacyerr(dev->wl, "Cannot request IRQ-%d\n",
                   dev->dev->irq);
            goto out;
      }
      /* We are ready to run. */
      b43legacy_set_status(dev, B43legacy_STAT_STARTED);

      /* Start data flow (TX/RX) */
      b43legacy_mac_enable(dev);
      b43legacy_write32(dev, B43legacy_MMIO_GEN_IRQ_MASK, dev->irq_mask);

      /* Start maintenance work */
      b43legacy_periodic_tasks_setup(dev);

      b43legacydbg(dev->wl, "Wireless interface started\n");
out:
      return err;
}

/* Get PHY and RADIO versioning numbers */
static int b43legacy_phy_versioning(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;
      u32 tmp;
      u8 analog_type;
      u8 phy_type;
      u8 phy_rev;
      u16 radio_manuf;
      u16 radio_ver;
      u16 radio_rev;
      int unsupported = 0;

      /* Get PHY versioning */
      tmp = b43legacy_read16(dev, B43legacy_MMIO_PHY_VER);
      analog_type = (tmp & B43legacy_PHYVER_ANALOG)
                  >> B43legacy_PHYVER_ANALOG_SHIFT;
      phy_type = (tmp & B43legacy_PHYVER_TYPE) >> B43legacy_PHYVER_TYPE_SHIFT;
      phy_rev = (tmp & B43legacy_PHYVER_VERSION);
      switch (phy_type) {
      case B43legacy_PHYTYPE_B:
            if (phy_rev != 2 && phy_rev != 4
                && phy_rev != 6 && phy_rev != 7)
                  unsupported = 1;
            break;
      case B43legacy_PHYTYPE_G:
            if (phy_rev > 8)
                  unsupported = 1;
            break;
      default:
            unsupported = 1;
      };
      if (unsupported) {
            b43legacyerr(dev->wl, "FOUND UNSUPPORTED PHY "
                   "(Analog %u, Type %u, Revision %u)\n",
                   analog_type, phy_type, phy_rev);
            return -EOPNOTSUPP;
      }
      b43legacydbg(dev->wl, "Found PHY: Analog %u, Type %u, Revision %u\n",
             analog_type, phy_type, phy_rev);


      /* Get RADIO versioning */
      if (dev->dev->bus->chip_id == 0x4317) {
            if (dev->dev->bus->chip_rev == 0)
                  tmp = 0x3205017F;
            else if (dev->dev->bus->chip_rev == 1)
                  tmp = 0x4205017F;
            else
                  tmp = 0x5205017F;
      } else {
            b43legacy_write16(dev, B43legacy_MMIO_RADIO_CONTROL,
                          B43legacy_RADIOCTL_ID);
            tmp = b43legacy_read16(dev, B43legacy_MMIO_RADIO_DATA_HIGH);
            tmp <<= 16;
            b43legacy_write16(dev, B43legacy_MMIO_RADIO_CONTROL,
                          B43legacy_RADIOCTL_ID);
            tmp |= b43legacy_read16(dev, B43legacy_MMIO_RADIO_DATA_LOW);
      }
      radio_manuf = (tmp & 0x00000FFF);
      radio_ver = (tmp & 0x0FFFF000) >> 12;
      radio_rev = (tmp & 0xF0000000) >> 28;
      switch (phy_type) {
      case B43legacy_PHYTYPE_B:
            if ((radio_ver & 0xFFF0) != 0x2050)
                  unsupported = 1;
            break;
      case B43legacy_PHYTYPE_G:
            if (radio_ver != 0x2050)
                  unsupported = 1;
            break;
      default:
            B43legacy_BUG_ON(1);
      }
      if (unsupported) {
            b43legacyerr(dev->wl, "FOUND UNSUPPORTED RADIO "
                   "(Manuf 0x%X, Version 0x%X, Revision %u)\n",
                   radio_manuf, radio_ver, radio_rev);
            return -EOPNOTSUPP;
      }
      b43legacydbg(dev->wl, "Found Radio: Manuf 0x%X, Version 0x%X,"
                 " Revision %u\n", radio_manuf, radio_ver, radio_rev);


      phy->radio_manuf = radio_manuf;
      phy->radio_ver = radio_ver;
      phy->radio_rev = radio_rev;

      phy->analog = analog_type;
      phy->type = phy_type;
      phy->rev = phy_rev;

      return 0;
}

static void setup_struct_phy_for_init(struct b43legacy_wldev *dev,
                              struct b43legacy_phy *phy)
{
      struct b43legacy_lopair *lo;
      int i;

      memset(phy->minlowsig, 0xFF, sizeof(phy->minlowsig));
      memset(phy->minlowsigpos, 0, sizeof(phy->minlowsigpos));

      /* Assume the radio is enabled. If it's not enabled, the state will
       * immediately get fixed on the first periodic work run. */
      dev->radio_hw_enable = 1;

      phy->savedpctlreg = 0xFFFF;
      phy->aci_enable = 0;
      phy->aci_wlan_automatic = 0;
      phy->aci_hw_rssi = 0;

      lo = phy->_lo_pairs;
      if (lo)
            memset(lo, 0, sizeof(struct b43legacy_lopair) *
                             B43legacy_LO_COUNT);
      phy->max_lb_gain = 0;
      phy->trsw_rx_gain = 0;

      /* Set default attenuation values. */
      phy->bbatt = b43legacy_default_baseband_attenuation(dev);
      phy->rfatt = b43legacy_default_radio_attenuation(dev);
      phy->txctl1 = b43legacy_default_txctl1(dev);
      phy->txpwr_offset = 0;

      /* NRSSI */
      phy->nrssislope = 0;
      for (i = 0; i < ARRAY_SIZE(phy->nrssi); i++)
            phy->nrssi[i] = -1000;
      for (i = 0; i < ARRAY_SIZE(phy->nrssi_lt); i++)
            phy->nrssi_lt[i] = i;

      phy->lofcal = 0xFFFF;
      phy->initval = 0xFFFF;

      phy->interfmode = B43legacy_INTERFMODE_NONE;
      phy->channel = 0xFF;
}

static void setup_struct_wldev_for_init(struct b43legacy_wldev *dev)
{
      /* Flags */
      dev->dfq_valid = 0;

      /* Stats */
      memset(&dev->stats, 0, sizeof(dev->stats));

      setup_struct_phy_for_init(dev, &dev->phy);

      /* IRQ related flags */
      dev->irq_reason = 0;
      memset(dev->dma_reason, 0, sizeof(dev->dma_reason));
      dev->irq_mask = B43legacy_IRQ_MASKTEMPLATE;

      dev->mac_suspended = 1;

      /* Noise calculation context */
      memset(&dev->noisecalc, 0, sizeof(dev->noisecalc));
}

static void b43legacy_imcfglo_timeouts_workaround(struct b43legacy_wldev *dev)
{
#ifdef CONFIG_SSB_DRIVER_PCICORE
      struct ssb_bus *bus = dev->dev->bus;
      u32 tmp;

      if (bus->pcicore.dev &&
          bus->pcicore.dev->id.coreid == SSB_DEV_PCI &&
          bus->pcicore.dev->id.revision <= 5) {
            /* IMCFGLO timeouts workaround. */
            tmp = ssb_read32(dev->dev, SSB_IMCFGLO);
            tmp &= ~SSB_IMCFGLO_REQTO;
            tmp &= ~SSB_IMCFGLO_SERTO;
            switch (bus->bustype) {
            case SSB_BUSTYPE_PCI:
            case SSB_BUSTYPE_PCMCIA:
                  tmp |= 0x32;
                  break;
            case SSB_BUSTYPE_SSB:
                  tmp |= 0x53;
                  break;
            }
            ssb_write32(dev->dev, SSB_IMCFGLO, tmp);
      }
#endif /* CONFIG_SSB_DRIVER_PCICORE */
}

static void b43legacy_set_synth_pu_delay(struct b43legacy_wldev *dev,
                                bool idle) {
      u16 pu_delay = 1050;

      if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_ADHOC) || idle)
            pu_delay = 500;
      if ((dev->phy.radio_ver == 0x2050) && (dev->phy.radio_rev == 8))
            pu_delay = max(pu_delay, (u16)2400);

      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
                        B43legacy_SHM_SH_SPUWKUP, pu_delay);
}

/* Set the TSF CFP pre-TargetBeaconTransmissionTime. */
static void b43legacy_set_pretbtt(struct b43legacy_wldev *dev)
{
      u16 pretbtt;

      /* The time value is in microseconds. */
      if (b43legacy_is_mode(dev->wl, NL80211_IFTYPE_ADHOC))
            pretbtt = 2;
      else
            pretbtt = 250;
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
                        B43legacy_SHM_SH_PRETBTT, pretbtt);
      b43legacy_write16(dev, B43legacy_MMIO_TSF_CFP_PRETBTT, pretbtt);
}

/* Shutdown a wireless core */
/* Locking: wl->mutex */
static void b43legacy_wireless_core_exit(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;
      u32 macctl;

      B43legacy_WARN_ON(b43legacy_status(dev) > B43legacy_STAT_INITIALIZED);
      if (b43legacy_status(dev) != B43legacy_STAT_INITIALIZED)
            return;
      b43legacy_set_status(dev, B43legacy_STAT_UNINIT);

      /* Stop the microcode PSM. */
      macctl = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
      macctl &= ~B43legacy_MACCTL_PSM_RUN;
      macctl |= B43legacy_MACCTL_PSM_JMP0;
      b43legacy_write32(dev, B43legacy_MMIO_MACCTL, macctl);

      b43legacy_leds_exit(dev);
      b43legacy_rng_exit(dev->wl);
      b43legacy_pio_free(dev);
      b43legacy_dma_free(dev);
      b43legacy_chip_exit(dev);
      b43legacy_radio_turn_off(dev, 1);
      b43legacy_switch_analog(dev, 0);
      if (phy->dyn_tssi_tbl)
            kfree(phy->tssi2dbm);
      kfree(phy->lo_control);
      phy->lo_control = NULL;
      if (dev->wl->current_beacon) {
            dev_kfree_skb_any(dev->wl->current_beacon);
            dev->wl->current_beacon = NULL;
      }

      ssb_device_disable(dev->dev, 0);
      ssb_bus_may_powerdown(dev->dev->bus);
}

static void prepare_phy_data_for_init(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;
      int i;

      /* Set default attenuation values. */
      phy->bbatt = b43legacy_default_baseband_attenuation(dev);
      phy->rfatt = b43legacy_default_radio_attenuation(dev);
      phy->txctl1 = b43legacy_default_txctl1(dev);
      phy->txctl2 = 0xFFFF;
      phy->txpwr_offset = 0;

      /* NRSSI */
      phy->nrssislope = 0;
      for (i = 0; i < ARRAY_SIZE(phy->nrssi); i++)
            phy->nrssi[i] = -1000;
      for (i = 0; i < ARRAY_SIZE(phy->nrssi_lt); i++)
            phy->nrssi_lt[i] = i;

      phy->lofcal = 0xFFFF;
      phy->initval = 0xFFFF;

      phy->aci_enable = 0;
      phy->aci_wlan_automatic = 0;
      phy->aci_hw_rssi = 0;

      phy->antenna_diversity = 0xFFFF;
      memset(phy->minlowsig, 0xFF, sizeof(phy->minlowsig));
      memset(phy->minlowsigpos, 0, sizeof(phy->minlowsigpos));

      /* Flags */
      phy->calibrated = 0;

      if (phy->_lo_pairs)
            memset(phy->_lo_pairs, 0,
                   sizeof(struct b43legacy_lopair) * B43legacy_LO_COUNT);
      memset(phy->loopback_gain, 0, sizeof(phy->loopback_gain));
}

/* Initialize a wireless core */
static int b43legacy_wireless_core_init(struct b43legacy_wldev *dev)
{
      struct b43legacy_wl *wl = dev->wl;
      struct ssb_bus *bus = dev->dev->bus;
      struct b43legacy_phy *phy = &dev->phy;
      struct ssb_sprom *sprom = &dev->dev->bus->sprom;
      int err;
      u32 hf;
      u32 tmp;

      B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_UNINIT);

      err = ssb_bus_powerup(bus, 0);
      if (err)
            goto out;
      if (!ssb_device_is_enabled(dev->dev)) {
            tmp = phy->gmode ? B43legacy_TMSLOW_GMODE : 0;
            b43legacy_wireless_core_reset(dev, tmp);
      }

      if ((phy->type == B43legacy_PHYTYPE_B) ||
          (phy->type == B43legacy_PHYTYPE_G)) {
            phy->_lo_pairs = kzalloc(sizeof(struct b43legacy_lopair)
                               * B43legacy_LO_COUNT,
                               GFP_KERNEL);
            if (!phy->_lo_pairs)
                  return -ENOMEM;
      }
      setup_struct_wldev_for_init(dev);

      err = b43legacy_phy_init_tssi2dbm_table(dev);
      if (err)
            goto err_kfree_lo_control;

      /* Enable IRQ routing to this device. */
      ssb_pcicore_dev_irqvecs_enable(&bus->pcicore, dev->dev);

      b43legacy_imcfglo_timeouts_workaround(dev);
      prepare_phy_data_for_init(dev);
      b43legacy_phy_calibrate(dev);
      err = b43legacy_chip_init(dev);
      if (err)
            goto err_kfree_tssitbl;
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
                        B43legacy_SHM_SH_WLCOREREV,
                        dev->dev->id.revision);
      hf = b43legacy_hf_read(dev);
      if (phy->type == B43legacy_PHYTYPE_G) {
            hf |= B43legacy_HF_SYMW;
            if (phy->rev == 1)
                  hf |= B43legacy_HF_GDCW;
            if (sprom->boardflags_lo & B43legacy_BFL_PACTRL)
                  hf |= B43legacy_HF_OFDMPABOOST;
      } else if (phy->type == B43legacy_PHYTYPE_B) {
            hf |= B43legacy_HF_SYMW;
            if (phy->rev >= 2 && phy->radio_ver == 0x2050)
                  hf &= ~B43legacy_HF_GDCW;
      }
      b43legacy_hf_write(dev, hf);

      b43legacy_set_retry_limits(dev,
                           B43legacy_DEFAULT_SHORT_RETRY_LIMIT,
                           B43legacy_DEFAULT_LONG_RETRY_LIMIT);

      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
                        0x0044, 3);
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
                        0x0046, 2);

      /* Disable sending probe responses from firmware.
       * Setting the MaxTime to one usec will always trigger
       * a timeout, so we never send any probe resp.
       * A timeout of zero is infinite. */
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED,
                        B43legacy_SHM_SH_PRMAXTIME, 1);

      b43legacy_rate_memory_init(dev);

      /* Minimum Contention Window */
      if (phy->type == B43legacy_PHYTYPE_B)
            b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
                              0x0003, 31);
      else
            b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
                              0x0003, 15);
      /* Maximum Contention Window */
      b43legacy_shm_write16(dev, B43legacy_SHM_WIRELESS,
                        0x0004, 1023);

      do {
            if (b43legacy_using_pio(dev))
                  err = b43legacy_pio_init(dev);
            else {
                  err = b43legacy_dma_init(dev);
                  if (!err)
                        b43legacy_qos_init(dev);
            }
      } while (err == -EAGAIN);
      if (err)
            goto err_chip_exit;

      b43legacy_set_synth_pu_delay(dev, 1);

      ssb_bus_powerup(bus, 1); /* Enable dynamic PCTL */
      b43legacy_upload_card_macaddress(dev);
      b43legacy_security_init(dev);
      b43legacy_rng_init(wl);

      b43legacy_set_status(dev, B43legacy_STAT_INITIALIZED);

      b43legacy_leds_init(dev);
out:
      return err;

err_chip_exit:
      b43legacy_chip_exit(dev);
err_kfree_tssitbl:
      if (phy->dyn_tssi_tbl)
            kfree(phy->tssi2dbm);
err_kfree_lo_control:
      kfree(phy->lo_control);
      phy->lo_control = NULL;
      ssb_bus_may_powerdown(bus);
      B43legacy_WARN_ON(b43legacy_status(dev) != B43legacy_STAT_UNINIT);
      return err;
}

static int b43legacy_op_add_interface(struct ieee80211_hw *hw,
                              struct ieee80211_if_init_conf *conf)
{
      struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
      struct b43legacy_wldev *dev;
      unsigned long flags;
      int err = -EOPNOTSUPP;

      /* TODO: allow WDS/AP devices to coexist */

      if (conf->type != NL80211_IFTYPE_AP &&
          conf->type != NL80211_IFTYPE_STATION &&
          conf->type != NL80211_IFTYPE_WDS &&
          conf->type != NL80211_IFTYPE_ADHOC)
            return -EOPNOTSUPP;

      mutex_lock(&wl->mutex);
      if (wl->operating)
            goto out_mutex_unlock;

      b43legacydbg(wl, "Adding Interface type %d\n", conf->type);

      dev = wl->current_dev;
      wl->operating = 1;
      wl->vif = conf->vif;
      wl->if_type = conf->type;
      memcpy(wl->mac_addr, conf->mac_addr, ETH_ALEN);

      spin_lock_irqsave(&wl->irq_lock, flags);
      b43legacy_adjust_opmode(dev);
      b43legacy_set_pretbtt(dev);
      b43legacy_set_synth_pu_delay(dev, 0);
      b43legacy_upload_card_macaddress(dev);
      spin_unlock_irqrestore(&wl->irq_lock, flags);

      err = 0;
 out_mutex_unlock:
      mutex_unlock(&wl->mutex);

      return err;
}

static void b43legacy_op_remove_interface(struct ieee80211_hw *hw,
                                struct ieee80211_if_init_conf *conf)
{
      struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
      struct b43legacy_wldev *dev = wl->current_dev;
      unsigned long flags;

      b43legacydbg(wl, "Removing Interface type %d\n", conf->type);

      mutex_lock(&wl->mutex);

      B43legacy_WARN_ON(!wl->operating);
      B43legacy_WARN_ON(wl->vif != conf->vif);
      wl->vif = NULL;

      wl->operating = 0;

      spin_lock_irqsave(&wl->irq_lock, flags);
      b43legacy_adjust_opmode(dev);
      memset(wl->mac_addr, 0, ETH_ALEN);
      b43legacy_upload_card_macaddress(dev);
      spin_unlock_irqrestore(&wl->irq_lock, flags);

      mutex_unlock(&wl->mutex);
}

static int b43legacy_op_start(struct ieee80211_hw *hw)
{
      struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
      struct b43legacy_wldev *dev = wl->current_dev;
      int did_init = 0;
      int err = 0;

      /* Kill all old instance specific information to make sure
       * the card won't use it in the short timeframe between start
       * and mac80211 reconfiguring it. */
      memset(wl->bssid, 0, ETH_ALEN);
      memset(wl->mac_addr, 0, ETH_ALEN);
      wl->filter_flags = 0;
      wl->beacon0_uploaded = 0;
      wl->beacon1_uploaded = 0;
      wl->beacon_templates_virgin = 1;
      wl->radio_enabled = 1;

      mutex_lock(&wl->mutex);

      if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED) {
            err = b43legacy_wireless_core_init(dev);
            if (err)
                  goto out_mutex_unlock;
            did_init = 1;
      }

      if (b43legacy_status(dev) < B43legacy_STAT_STARTED) {
            err = b43legacy_wireless_core_start(dev);
            if (err) {
                  if (did_init)
                        b43legacy_wireless_core_exit(dev);
                  goto out_mutex_unlock;
            }
      }

      wiphy_rfkill_start_polling(hw->wiphy);

out_mutex_unlock:
      mutex_unlock(&wl->mutex);

      return err;
}

static void b43legacy_op_stop(struct ieee80211_hw *hw)
{
      struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
      struct b43legacy_wldev *dev = wl->current_dev;

      cancel_work_sync(&(wl->beacon_update_trigger));

      mutex_lock(&wl->mutex);
      if (b43legacy_status(dev) >= B43legacy_STAT_STARTED)
            b43legacy_wireless_core_stop(dev);
      b43legacy_wireless_core_exit(dev);
      wl->radio_enabled = 0;
      mutex_unlock(&wl->mutex);
}

static int b43legacy_op_beacon_set_tim(struct ieee80211_hw *hw,
                               struct ieee80211_sta *sta, bool set)
{
      struct b43legacy_wl *wl = hw_to_b43legacy_wl(hw);
      unsigned long flags;

      spin_lock_irqsave(&wl->irq_lock, flags);
      b43legacy_update_templates(wl);
      spin_unlock_irqrestore(&wl->irq_lock, flags);

      return 0;
}

static const struct ieee80211_ops b43legacy_hw_ops = {
      .tx               = b43legacy_op_tx,
      .conf_tx          = b43legacy_op_conf_tx,
      .add_interface          = b43legacy_op_add_interface,
      .remove_interface = b43legacy_op_remove_interface,
      .config                 = b43legacy_op_dev_config,
      .bss_info_changed = b43legacy_op_bss_info_changed,
      .configure_filter = b43legacy_op_configure_filter,
      .get_stats        = b43legacy_op_get_stats,
      .get_tx_stats           = b43legacy_op_get_tx_stats,
      .start                  = b43legacy_op_start,
      .stop             = b43legacy_op_stop,
      .set_tim          = b43legacy_op_beacon_set_tim,
      .rfkill_poll            = b43legacy_rfkill_poll,
};

/* Hard-reset the chip. Do not call this directly.
 * Use b43legacy_controller_restart()
 */
static void b43legacy_chip_reset(struct work_struct *work)
{
      struct b43legacy_wldev *dev =
            container_of(work, struct b43legacy_wldev, restart_work);
      struct b43legacy_wl *wl = dev->wl;
      int err = 0;
      int prev_status;

      mutex_lock(&wl->mutex);

      prev_status = b43legacy_status(dev);
      /* Bring the device down... */
      if (prev_status >= B43legacy_STAT_STARTED)
            b43legacy_wireless_core_stop(dev);
      if (prev_status >= B43legacy_STAT_INITIALIZED)
            b43legacy_wireless_core_exit(dev);

      /* ...and up again. */
      if (prev_status >= B43legacy_STAT_INITIALIZED) {
            err = b43legacy_wireless_core_init(dev);
            if (err)
                  goto out;
      }
      if (prev_status >= B43legacy_STAT_STARTED) {
            err = b43legacy_wireless_core_start(dev);
            if (err) {
                  b43legacy_wireless_core_exit(dev);
                  goto out;
            }
      }
out:
      if (err)
            wl->current_dev = NULL; /* Failed to init the dev. */
      mutex_unlock(&wl->mutex);
      if (err)
            b43legacyerr(wl, "Controller restart FAILED\n");
      else
            b43legacyinfo(wl, "Controller restarted\n");
}

static int b43legacy_setup_modes(struct b43legacy_wldev *dev,
                         int have_bphy,
                         int have_gphy)
{
      struct ieee80211_hw *hw = dev->wl->hw;
      struct b43legacy_phy *phy = &dev->phy;

      phy->possible_phymodes = 0;
      if (have_bphy) {
            hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
                  &b43legacy_band_2GHz_BPHY;
            phy->possible_phymodes |= B43legacy_PHYMODE_B;
      }

      if (have_gphy) {
            hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
                  &b43legacy_band_2GHz_GPHY;
            phy->possible_phymodes |= B43legacy_PHYMODE_G;
      }

      return 0;
}

static void b43legacy_wireless_core_detach(struct b43legacy_wldev *dev)
{
      /* We release firmware that late to not be required to re-request
       * is all the time when we reinit the core. */
      b43legacy_release_firmware(dev);
}

static int b43legacy_wireless_core_attach(struct b43legacy_wldev *dev)
{
      struct b43legacy_wl *wl = dev->wl;
      struct ssb_bus *bus = dev->dev->bus;
      struct pci_dev *pdev = bus->host_pci;
      int err;
      int have_bphy = 0;
      int have_gphy = 0;
      u32 tmp;

      /* Do NOT do any device initialization here.
       * Do it in wireless_core_init() instead.
       * This function is for gathering basic information about the HW, only.
       * Also some structs may be set up here. But most likely you want to
       * have that in core_init(), too.
       */

      err = ssb_bus_powerup(bus, 0);
      if (err) {
            b43legacyerr(wl, "Bus powerup failed\n");
            goto out;
      }
      /* Get the PHY type. */
      if (dev->dev->id.revision >= 5) {
            u32 tmshigh;

            tmshigh = ssb_read32(dev->dev, SSB_TMSHIGH);
            have_gphy = !!(tmshigh & B43legacy_TMSHIGH_GPHY);
            if (!have_gphy)
                  have_bphy = 1;
      } else if (dev->dev->id.revision == 4)
            have_gphy = 1;
      else
            have_bphy = 1;

      dev->phy.gmode = (have_gphy || have_bphy);
      dev->phy.radio_on = 1;
      tmp = dev->phy.gmode ? B43legacy_TMSLOW_GMODE : 0;
      b43legacy_wireless_core_reset(dev, tmp);

      err = b43legacy_phy_versioning(dev);
      if (err)
            goto err_powerdown;
      /* Check if this device supports multiband. */
      if (!pdev ||
          (pdev->device != 0x4312 &&
           pdev->device != 0x4319 &&
           pdev->device != 0x4324)) {
            /* No multiband support. */
            have_bphy = 0;
            have_gphy = 0;
            switch (dev->phy.type) {
            case B43legacy_PHYTYPE_B:
                  have_bphy = 1;
                  break;
            case B43legacy_PHYTYPE_G:
                  have_gphy = 1;
                  break;
            default:
                  B43legacy_BUG_ON(1);
            }
      }
      dev->phy.gmode = (have_gphy || have_bphy);
      tmp = dev->phy.gmode ? B43legacy_TMSLOW_GMODE : 0;
      b43legacy_wireless_core_reset(dev, tmp);

      err = b43legacy_validate_chipaccess(dev);
      if (err)
            goto err_powerdown;
      err = b43legacy_setup_modes(dev, have_bphy, have_gphy);
      if (err)
            goto err_powerdown;

      /* Now set some default "current_dev" */
      if (!wl->current_dev)
            wl->current_dev = dev;
      INIT_WORK(&dev->restart_work, b43legacy_chip_reset);

      b43legacy_radio_turn_off(dev, 1);
      b43legacy_switch_analog(dev, 0);
      ssb_device_disable(dev->dev, 0);
      ssb_bus_may_powerdown(bus);

out:
      return err;

err_powerdown:
      ssb_bus_may_powerdown(bus);
      return err;
}

static void b43legacy_one_core_detach(struct ssb_device *dev)
{
      struct b43legacy_wldev *wldev;
      struct b43legacy_wl *wl;

      /* Do not cancel ieee80211-workqueue based work here.
       * See comment in b43legacy_remove(). */

      wldev = ssb_get_drvdata(dev);
      wl = wldev->wl;
      b43legacy_debugfs_remove_device(wldev);
      b43legacy_wireless_core_detach(wldev);
      list_del(&wldev->list);
      wl->nr_devs--;
      ssb_set_drvdata(dev, NULL);
      kfree(wldev);
}

static int b43legacy_one_core_attach(struct ssb_device *dev,
                             struct b43legacy_wl *wl)
{
      struct b43legacy_wldev *wldev;
      struct pci_dev *pdev;
      int err = -ENOMEM;

      if (!list_empty(&wl->devlist)) {
            /* We are not the first core on this chip. */
            pdev = dev->bus->host_pci;
            /* Only special chips support more than one wireless
             * core, although some of the other chips have more than
             * one wireless core as well. Check for this and
             * bail out early.
             */
            if (!pdev ||
                ((pdev->device != 0x4321) &&
                 (pdev->device != 0x4313) &&
                 (pdev->device != 0x431A))) {
                  b43legacydbg(wl, "Ignoring unconnected 802.11 core\n");
                  return -ENODEV;
            }
      }

      wldev = kzalloc(sizeof(*wldev), GFP_KERNEL);
      if (!wldev)
            goto out;

      wldev->dev = dev;
      wldev->wl = wl;
      b43legacy_set_status(wldev, B43legacy_STAT_UNINIT);
      wldev->bad_frames_preempt = modparam_bad_frames_preempt;
      tasklet_init(&wldev->isr_tasklet,
                 (void (*)(unsigned long))b43legacy_interrupt_tasklet,
                 (unsigned long)wldev);
      if (modparam_pio)
            wldev->__using_pio = 1;
      INIT_LIST_HEAD(&wldev->list);

      err = b43legacy_wireless_core_attach(wldev);
      if (err)
            goto err_kfree_wldev;

      list_add(&wldev->list, &wl->devlist);
      wl->nr_devs++;
      ssb_set_drvdata(dev, wldev);
      b43legacy_debugfs_add_device(wldev);
out:
      return err;

err_kfree_wldev:
      kfree(wldev);
      return err;
}

static void b43legacy_sprom_fixup(struct ssb_bus *bus)
{
      /* boardflags workarounds */
      if (bus->boardinfo.vendor == PCI_VENDOR_ID_APPLE &&
          bus->boardinfo.type == 0x4E &&
          bus->boardinfo.rev > 0x40)
            bus->sprom.boardflags_lo |= B43legacy_BFL_PACTRL;
}

static void b43legacy_wireless_exit(struct ssb_device *dev,
                          struct b43legacy_wl *wl)
{
      struct ieee80211_hw *hw = wl->hw;

      ssb_set_devtypedata(dev, NULL);
      ieee80211_free_hw(hw);
}

static int b43legacy_wireless_init(struct ssb_device *dev)
{
      struct ssb_sprom *sprom = &dev->bus->sprom;
      struct ieee80211_hw *hw;
      struct b43legacy_wl *wl;
      int err = -ENOMEM;

      b43legacy_sprom_fixup(dev->bus);

      hw = ieee80211_alloc_hw(sizeof(*wl), &b43legacy_hw_ops);
      if (!hw) {
            b43legacyerr(NULL, "Could not allocate ieee80211 device\n");
            goto out;
      }

      /* fill hw info */
      hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
                IEEE80211_HW_SIGNAL_DBM |
                IEEE80211_HW_NOISE_DBM;
      hw->wiphy->interface_modes =
            BIT(NL80211_IFTYPE_AP) |
            BIT(NL80211_IFTYPE_STATION) |
            BIT(NL80211_IFTYPE_WDS) |
            BIT(NL80211_IFTYPE_ADHOC);
      hw->queues = 1; /* FIXME: hardware has more queues */
      hw->max_rates = 2;
      SET_IEEE80211_DEV(hw, dev->dev);
      if (is_valid_ether_addr(sprom->et1mac))
            SET_IEEE80211_PERM_ADDR(hw, sprom->et1mac);
      else
            SET_IEEE80211_PERM_ADDR(hw, sprom->il0mac);

      /* Get and initialize struct b43legacy_wl */
      wl = hw_to_b43legacy_wl(hw);
      memset(wl, 0, sizeof(*wl));
      wl->hw = hw;
      spin_lock_init(&wl->irq_lock);
      spin_lock_init(&wl->leds_lock);
      mutex_init(&wl->mutex);
      INIT_LIST_HEAD(&wl->devlist);
      INIT_WORK(&wl->beacon_update_trigger, b43legacy_beacon_update_trigger_work);

      ssb_set_devtypedata(dev, wl);
      b43legacyinfo(wl, "Broadcom %04X WLAN found\n", dev->bus->chip_id);
      err = 0;
out:
      return err;
}

static int b43legacy_probe(struct ssb_device *dev,
                   const struct ssb_device_id *id)
{
      struct b43legacy_wl *wl;
      int err;
      int first = 0;

      wl = ssb_get_devtypedata(dev);
      if (!wl) {
            /* Probing the first core - setup common struct b43legacy_wl */
            first = 1;
            err = b43legacy_wireless_init(dev);
            if (err)
                  goto out;
            wl = ssb_get_devtypedata(dev);
            B43legacy_WARN_ON(!wl);
      }
      err = b43legacy_one_core_attach(dev, wl);
      if (err)
            goto err_wireless_exit;

      if (first) {
            err = ieee80211_register_hw(wl->hw);
            if (err)
                  goto err_one_core_detach;
      }

out:
      return err;

err_one_core_detach:
      b43legacy_one_core_detach(dev);
err_wireless_exit:
      if (first)
            b43legacy_wireless_exit(dev, wl);
      return err;
}

static void b43legacy_remove(struct ssb_device *dev)
{
      struct b43legacy_wl *wl = ssb_get_devtypedata(dev);
      struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);

      /* We must cancel any work here before unregistering from ieee80211,
       * as the ieee80211 unreg will destroy the workqueue. */
      cancel_work_sync(&wldev->restart_work);

      B43legacy_WARN_ON(!wl);
      if (wl->current_dev == wldev)
            ieee80211_unregister_hw(wl->hw);

      b43legacy_one_core_detach(dev);

      if (list_empty(&wl->devlist))
            /* Last core on the chip unregistered.
             * We can destroy common struct b43legacy_wl.
             */
            b43legacy_wireless_exit(dev, wl);
}

/* Perform a hardware reset. This can be called from any context. */
void b43legacy_controller_restart(struct b43legacy_wldev *dev,
                          const char *reason)
{
      /* Must avoid requeueing, if we are in shutdown. */
      if (b43legacy_status(dev) < B43legacy_STAT_INITIALIZED)
            return;
      b43legacyinfo(dev->wl, "Controller RESET (%s) ...\n", reason);
      queue_work(dev->wl->hw->workqueue, &dev->restart_work);
}

#ifdef CONFIG_PM

static int b43legacy_suspend(struct ssb_device *dev, pm_message_t state)
{
      struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
      struct b43legacy_wl *wl = wldev->wl;

      b43legacydbg(wl, "Suspending...\n");

      mutex_lock(&wl->mutex);
      wldev->suspend_init_status = b43legacy_status(wldev);
      if (wldev->suspend_init_status >= B43legacy_STAT_STARTED)
            b43legacy_wireless_core_stop(wldev);
      if (wldev->suspend_init_status >= B43legacy_STAT_INITIALIZED)
            b43legacy_wireless_core_exit(wldev);
      mutex_unlock(&wl->mutex);

      b43legacydbg(wl, "Device suspended.\n");

      return 0;
}

static int b43legacy_resume(struct ssb_device *dev)
{
      struct b43legacy_wldev *wldev = ssb_get_drvdata(dev);
      struct b43legacy_wl *wl = wldev->wl;
      int err = 0;

      b43legacydbg(wl, "Resuming...\n");

      mutex_lock(&wl->mutex);
      if (wldev->suspend_init_status >= B43legacy_STAT_INITIALIZED) {
            err = b43legacy_wireless_core_init(wldev);
            if (err) {
                  b43legacyerr(wl, "Resume failed at core init\n");
                  goto out;
            }
      }
      if (wldev->suspend_init_status >= B43legacy_STAT_STARTED) {
            err = b43legacy_wireless_core_start(wldev);
            if (err) {
                  b43legacy_wireless_core_exit(wldev);
                  b43legacyerr(wl, "Resume failed at core start\n");
                  goto out;
            }
      }

      b43legacydbg(wl, "Device resumed.\n");
out:
      mutex_unlock(&wl->mutex);
      return err;
}

#else /* CONFIG_PM */
# define b43legacy_suspend    NULL
# define b43legacy_resume           NULL
#endif      /* CONFIG_PM */

static struct ssb_driver b43legacy_ssb_driver = {
      .name       = KBUILD_MODNAME,
      .id_table   = b43legacy_ssb_tbl,
      .probe            = b43legacy_probe,
      .remove           = b43legacy_remove,
      .suspend    = b43legacy_suspend,
      .resume           = b43legacy_resume,
};

static void b43legacy_print_driverinfo(void)
{
      const char *feat_pci = "", *feat_leds = "", *feat_rfkill = "",
               *feat_pio = "", *feat_dma = "";

#ifdef CONFIG_B43LEGACY_PCI_AUTOSELECT
      feat_pci = "P";
#endif
#ifdef CONFIG_B43LEGACY_LEDS
      feat_leds = "L";
#endif
#ifdef CONFIG_B43LEGACY_RFKILL
      feat_rfkill = "R";
#endif
#ifdef CONFIG_B43LEGACY_PIO
      feat_pio = "I";
#endif
#ifdef CONFIG_B43LEGACY_DMA
      feat_dma = "D";
#endif
      printk(KERN_INFO "Broadcom 43xx-legacy driver loaded "
             "[ Features: %s%s%s%s%s, Firmware-ID: "
             B43legacy_SUPPORTED_FIRMWARE_ID " ]\n",
             feat_pci, feat_leds, feat_rfkill, feat_pio, feat_dma);
}

static int __init b43legacy_init(void)
{
      int err;

      b43legacy_debugfs_init();

      err = ssb_driver_register(&b43legacy_ssb_driver);
      if (err)
            goto err_dfs_exit;

      b43legacy_print_driverinfo();

      return err;

err_dfs_exit:
      b43legacy_debugfs_exit();
      return err;
}

static void __exit b43legacy_exit(void)
{
      ssb_driver_unregister(&b43legacy_ssb_driver);
      b43legacy_debugfs_exit();
}

module_init(b43legacy_init)
module_exit(b43legacy_exit)

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