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radio.c

/*

  Broadcom B43legacy wireless driver

  Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
                 Stefano Brivio <st3@riseup.net>
                 Michael Buesch <mbuesch@freenet.de>
                 Danny van Dyk <kugelfang@gentoo.org>
                 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 "b43legacy.h"
#include "main.h"
#include "phy.h"
#include "radio.h"
#include "ilt.h"


/* Table for b43legacy_radio_calibrationvalue() */
static const u16 rcc_table[16] = {
      0x0002, 0x0003, 0x0001, 0x000F,
      0x0006, 0x0007, 0x0005, 0x000F,
      0x000A, 0x000B, 0x0009, 0x000F,
      0x000E, 0x000F, 0x000D, 0x000F,
};

/* Reverse the bits of a 4bit value.
 * Example:  1101 is flipped 1011
 */
static u16 flip_4bit(u16 value)
{
      u16 flipped = 0x0000;

      B43legacy_BUG_ON(!((value & ~0x000F) == 0x0000));

      flipped |= (value & 0x0001) << 3;
      flipped |= (value & 0x0002) << 1;
      flipped |= (value & 0x0004) >> 1;
      flipped |= (value & 0x0008) >> 3;

      return flipped;
}

/* Get the freq, as it has to be written to the device. */
static inline
u16 channel2freq_bg(u8 channel)
{
      /* Frequencies are given as frequencies_bg[index] + 2.4GHz
       * Starting with channel 1
       */
      static const u16 frequencies_bg[14] = {
            12, 17, 22, 27,
            32, 37, 42, 47,
            52, 57, 62, 67,
            72, 84,
      };

      if (unlikely(channel < 1 || channel > 14)) {
            printk(KERN_INFO "b43legacy: Channel %d is out of range\n",
                          channel);
            dump_stack();
            return 2412;
      }

      return frequencies_bg[channel - 1];
}

void b43legacy_radio_lock(struct b43legacy_wldev *dev)
{
      u32 status;

      status = b43legacy_read32(dev, B43legacy_MMIO_STATUS_BITFIELD);
      status |= B43legacy_SBF_RADIOREG_LOCK;
      b43legacy_write32(dev, B43legacy_MMIO_STATUS_BITFIELD, status);
      mmiowb();
      udelay(10);
}

void b43legacy_radio_unlock(struct b43legacy_wldev *dev)
{
      u32 status;

      b43legacy_read16(dev, B43legacy_MMIO_PHY_VER); /* dummy read */
      status = b43legacy_read32(dev, B43legacy_MMIO_STATUS_BITFIELD);
      status &= ~B43legacy_SBF_RADIOREG_LOCK;
      b43legacy_write32(dev, B43legacy_MMIO_STATUS_BITFIELD, status);
      mmiowb();
}

u16 b43legacy_radio_read16(struct b43legacy_wldev *dev, u16 offset)
{
      struct b43legacy_phy *phy = &dev->phy;

      switch (phy->type) {
      case B43legacy_PHYTYPE_B:
            if (phy->radio_ver == 0x2053) {
                  if (offset < 0x70)
                        offset += 0x80;
                  else if (offset < 0x80)
                        offset += 0x70;
            } else if (phy->radio_ver == 0x2050)
                  offset |= 0x80;
            else
                  B43legacy_WARN_ON(1);
            break;
      case B43legacy_PHYTYPE_G:
            offset |= 0x80;
            break;
      default:
            B43legacy_BUG_ON(1);
      }

      b43legacy_write16(dev, B43legacy_MMIO_RADIO_CONTROL, offset);
      return b43legacy_read16(dev, B43legacy_MMIO_RADIO_DATA_LOW);
}

void b43legacy_radio_write16(struct b43legacy_wldev *dev, u16 offset, u16 val)
{
      b43legacy_write16(dev, B43legacy_MMIO_RADIO_CONTROL, offset);
      mmiowb();
      b43legacy_write16(dev, B43legacy_MMIO_RADIO_DATA_LOW, val);
}

static void b43legacy_set_all_gains(struct b43legacy_wldev *dev,
                          s16 first, s16 second, s16 third)
{
      struct b43legacy_phy *phy = &dev->phy;
      u16 i;
      u16 start = 0x08;
      u16 end = 0x18;
      u16 offset = 0x0400;
      u16 tmp;

      if (phy->rev <= 1) {
            offset = 0x5000;
            start = 0x10;
            end = 0x20;
      }

      for (i = 0; i < 4; i++)
            b43legacy_ilt_write(dev, offset + i, first);

      for (i = start; i < end; i++)
            b43legacy_ilt_write(dev, offset + i, second);

      if (third != -1) {
            tmp = ((u16)third << 14) | ((u16)third << 6);
            b43legacy_phy_write(dev, 0x04A0,
                            (b43legacy_phy_read(dev, 0x04A0) & 0xBFBF)
                            | tmp);
            b43legacy_phy_write(dev, 0x04A1,
                            (b43legacy_phy_read(dev, 0x04A1) & 0xBFBF)
                            | tmp);
            b43legacy_phy_write(dev, 0x04A2,
                            (b43legacy_phy_read(dev, 0x04A2) & 0xBFBF)
                            | tmp);
      }
      b43legacy_dummy_transmission(dev);
}

static void b43legacy_set_original_gains(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;
      u16 i;
      u16 tmp;
      u16 offset = 0x0400;
      u16 start = 0x0008;
      u16 end = 0x0018;

      if (phy->rev <= 1) {
            offset = 0x5000;
            start = 0x0010;
            end = 0x0020;
      }

      for (i = 0; i < 4; i++) {
            tmp = (i & 0xFFFC);
            tmp |= (i & 0x0001) << 1;
            tmp |= (i & 0x0002) >> 1;

            b43legacy_ilt_write(dev, offset + i, tmp);
      }

      for (i = start; i < end; i++)
            b43legacy_ilt_write(dev, offset + i, i - start);

      b43legacy_phy_write(dev, 0x04A0,
                      (b43legacy_phy_read(dev, 0x04A0) & 0xBFBF)
                      | 0x4040);
      b43legacy_phy_write(dev, 0x04A1,
                      (b43legacy_phy_read(dev, 0x04A1) & 0xBFBF)
                      | 0x4040);
      b43legacy_phy_write(dev, 0x04A2,
                      (b43legacy_phy_read(dev, 0x04A2) & 0xBFBF)
                      | 0x4000);
      b43legacy_dummy_transmission(dev);
}

/* Synthetic PU workaround */
static void b43legacy_synth_pu_workaround(struct b43legacy_wldev *dev,
                                u8 channel)
{
      struct b43legacy_phy *phy = &dev->phy;

      might_sleep();

      if (phy->radio_ver != 0x2050 || phy->radio_rev >= 6)
            /* We do not need the workaround. */
            return;

      if (channel <= 10)
            b43legacy_write16(dev, B43legacy_MMIO_CHANNEL,
                          channel2freq_bg(channel + 4));
      else
            b43legacy_write16(dev, B43legacy_MMIO_CHANNEL,
                          channel2freq_bg(channel));
      msleep(1);
      b43legacy_write16(dev, B43legacy_MMIO_CHANNEL,
                    channel2freq_bg(channel));
}

u8 b43legacy_radio_aci_detect(struct b43legacy_wldev *dev, u8 channel)
{
      struct b43legacy_phy *phy = &dev->phy;
      u8 ret = 0;
      u16 saved;
      u16 rssi;
      u16 temp;
      int i;
      int j = 0;

      saved = b43legacy_phy_read(dev, 0x0403);
      b43legacy_radio_selectchannel(dev, channel, 0);
      b43legacy_phy_write(dev, 0x0403, (saved & 0xFFF8) | 5);
      if (phy->aci_hw_rssi)
            rssi = b43legacy_phy_read(dev, 0x048A) & 0x3F;
      else
            rssi = saved & 0x3F;
      /* clamp temp to signed 5bit */
      if (rssi > 32)
            rssi -= 64;
      for (i = 0; i < 100; i++) {
            temp = (b43legacy_phy_read(dev, 0x047F) >> 8) & 0x3F;
            if (temp > 32)
                  temp -= 64;
            if (temp < rssi)
                  j++;
            if (j >= 20)
                  ret = 1;
      }
      b43legacy_phy_write(dev, 0x0403, saved);

      return ret;
}

u8 b43legacy_radio_aci_scan(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;
      u8 ret[13];
      unsigned int channel = phy->channel;
      unsigned int i;
      unsigned int j;
      unsigned int start;
      unsigned int end;
      unsigned long phylock_flags;

      if (!((phy->type == B43legacy_PHYTYPE_G) && (phy->rev > 0)))
            return 0;

      b43legacy_phy_lock(dev, phylock_flags);
      b43legacy_radio_lock(dev);
      b43legacy_phy_write(dev, 0x0802,
                      b43legacy_phy_read(dev, 0x0802) & 0xFFFC);
      b43legacy_phy_write(dev, B43legacy_PHY_G_CRS,
                      b43legacy_phy_read(dev, B43legacy_PHY_G_CRS)
                      & 0x7FFF);
      b43legacy_set_all_gains(dev, 3, 8, 1);

      start = (channel - 5 > 0) ? channel - 5 : 1;
      end = (channel + 5 < 14) ? channel + 5 : 13;

      for (i = start; i <= end; i++) {
            if (abs(channel - i) > 2)
                  ret[i-1] = b43legacy_radio_aci_detect(dev, i);
      }
      b43legacy_radio_selectchannel(dev, channel, 0);
      b43legacy_phy_write(dev, 0x0802,
                      (b43legacy_phy_read(dev, 0x0802) & 0xFFFC)
                      | 0x0003);
      b43legacy_phy_write(dev, 0x0403,
                      b43legacy_phy_read(dev, 0x0403) & 0xFFF8);
      b43legacy_phy_write(dev, B43legacy_PHY_G_CRS,
                      b43legacy_phy_read(dev, B43legacy_PHY_G_CRS)
                      | 0x8000);
      b43legacy_set_original_gains(dev);
      for (i = 0; i < 13; i++) {
            if (!ret[i])
                  continue;
            end = (i + 5 < 13) ? i + 5 : 13;
            for (j = i; j < end; j++)
                  ret[j] = 1;
      }
      b43legacy_radio_unlock(dev);
      b43legacy_phy_unlock(dev, phylock_flags);

      return ret[channel - 1];
}

/* http://bcm-specs.sipsolutions.net/NRSSILookupTable */
void b43legacy_nrssi_hw_write(struct b43legacy_wldev *dev, u16 offset, s16 val)
{
      b43legacy_phy_write(dev, B43legacy_PHY_NRSSILT_CTRL, offset);
      mmiowb();
      b43legacy_phy_write(dev, B43legacy_PHY_NRSSILT_DATA, (u16)val);
}

/* http://bcm-specs.sipsolutions.net/NRSSILookupTable */
s16 b43legacy_nrssi_hw_read(struct b43legacy_wldev *dev, u16 offset)
{
      u16 val;

      b43legacy_phy_write(dev, B43legacy_PHY_NRSSILT_CTRL, offset);
      val = b43legacy_phy_read(dev, B43legacy_PHY_NRSSILT_DATA);

      return (s16)val;
}

/* http://bcm-specs.sipsolutions.net/NRSSILookupTable */
void b43legacy_nrssi_hw_update(struct b43legacy_wldev *dev, u16 val)
{
      u16 i;
      s16 tmp;

      for (i = 0; i < 64; i++) {
            tmp = b43legacy_nrssi_hw_read(dev, i);
            tmp -= val;
            tmp = limit_value(tmp, -32, 31);
            b43legacy_nrssi_hw_write(dev, i, tmp);
      }
}

/* http://bcm-specs.sipsolutions.net/NRSSILookupTable */
void b43legacy_nrssi_mem_update(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;
      s16 i;
      s16 delta;
      s32 tmp;

      delta = 0x1F - phy->nrssi[0];
      for (i = 0; i < 64; i++) {
            tmp = (i - delta) * phy->nrssislope;
            tmp /= 0x10000;
            tmp += 0x3A;
            tmp = limit_value(tmp, 0, 0x3F);
            phy->nrssi_lt[i] = tmp;
      }
}

static void b43legacy_calc_nrssi_offset(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;
      u16 backup[20] = { 0 };
      s16 v47F;
      u16 i;
      u16 saved = 0xFFFF;

      backup[0] = b43legacy_phy_read(dev, 0x0001);
      backup[1] = b43legacy_phy_read(dev, 0x0811);
      backup[2] = b43legacy_phy_read(dev, 0x0812);
      backup[3] = b43legacy_phy_read(dev, 0x0814);
      backup[4] = b43legacy_phy_read(dev, 0x0815);
      backup[5] = b43legacy_phy_read(dev, 0x005A);
      backup[6] = b43legacy_phy_read(dev, 0x0059);
      backup[7] = b43legacy_phy_read(dev, 0x0058);
      backup[8] = b43legacy_phy_read(dev, 0x000A);
      backup[9] = b43legacy_phy_read(dev, 0x0003);
      backup[10] = b43legacy_radio_read16(dev, 0x007A);
      backup[11] = b43legacy_radio_read16(dev, 0x0043);

      b43legacy_phy_write(dev, 0x0429,
                      b43legacy_phy_read(dev, 0x0429) & 0x7FFF);
      b43legacy_phy_write(dev, 0x0001,
                      (b43legacy_phy_read(dev, 0x0001) & 0x3FFF)
                      | 0x4000);
      b43legacy_phy_write(dev, 0x0811,
                      b43legacy_phy_read(dev, 0x0811) | 0x000C);
      b43legacy_phy_write(dev, 0x0812,
                      (b43legacy_phy_read(dev, 0x0812) & 0xFFF3)
                      | 0x0004);
      b43legacy_phy_write(dev, 0x0802,
                      b43legacy_phy_read(dev, 0x0802) & ~(0x1 | 0x2));
      if (phy->rev >= 6) {
            backup[12] = b43legacy_phy_read(dev, 0x002E);
            backup[13] = b43legacy_phy_read(dev, 0x002F);
            backup[14] = b43legacy_phy_read(dev, 0x080F);
            backup[15] = b43legacy_phy_read(dev, 0x0810);
            backup[16] = b43legacy_phy_read(dev, 0x0801);
            backup[17] = b43legacy_phy_read(dev, 0x0060);
            backup[18] = b43legacy_phy_read(dev, 0x0014);
            backup[19] = b43legacy_phy_read(dev, 0x0478);

            b43legacy_phy_write(dev, 0x002E, 0);
            b43legacy_phy_write(dev, 0x002F, 0);
            b43legacy_phy_write(dev, 0x080F, 0);
            b43legacy_phy_write(dev, 0x0810, 0);
            b43legacy_phy_write(dev, 0x0478,
                            b43legacy_phy_read(dev, 0x0478) | 0x0100);
            b43legacy_phy_write(dev, 0x0801,
                            b43legacy_phy_read(dev, 0x0801) | 0x0040);
            b43legacy_phy_write(dev, 0x0060,
                            b43legacy_phy_read(dev, 0x0060) | 0x0040);
            b43legacy_phy_write(dev, 0x0014,
                            b43legacy_phy_read(dev, 0x0014) | 0x0200);
      }
      b43legacy_radio_write16(dev, 0x007A,
                        b43legacy_radio_read16(dev, 0x007A) | 0x0070);
      b43legacy_radio_write16(dev, 0x007A,
                        b43legacy_radio_read16(dev, 0x007A) | 0x0080);
      udelay(30);

      v47F = (s16)((b43legacy_phy_read(dev, 0x047F) >> 8) & 0x003F);
      if (v47F >= 0x20)
            v47F -= 0x40;
      if (v47F == 31) {
            for (i = 7; i >= 4; i--) {
                  b43legacy_radio_write16(dev, 0x007B, i);
                  udelay(20);
                  v47F = (s16)((b43legacy_phy_read(dev, 0x047F) >> 8)
                                           & 0x003F);
                  if (v47F >= 0x20)
                        v47F -= 0x40;
                  if (v47F < 31 && saved == 0xFFFF)
                        saved = i;
            }
            if (saved == 0xFFFF)
                  saved = 4;
      } else {
            b43legacy_radio_write16(dev, 0x007A,
                              b43legacy_radio_read16(dev, 0x007A)
                              & 0x007F);
            b43legacy_phy_write(dev, 0x0814,
                            b43legacy_phy_read(dev, 0x0814) | 0x0001);
            b43legacy_phy_write(dev, 0x0815,
                            b43legacy_phy_read(dev, 0x0815) & 0xFFFE);
            b43legacy_phy_write(dev, 0x0811,
                            b43legacy_phy_read(dev, 0x0811) | 0x000C);
            b43legacy_phy_write(dev, 0x0812,
                            b43legacy_phy_read(dev, 0x0812) | 0x000C);
            b43legacy_phy_write(dev, 0x0811,
                            b43legacy_phy_read(dev, 0x0811) | 0x0030);
            b43legacy_phy_write(dev, 0x0812,
                            b43legacy_phy_read(dev, 0x0812) | 0x0030);
            b43legacy_phy_write(dev, 0x005A, 0x0480);
            b43legacy_phy_write(dev, 0x0059, 0x0810);
            b43legacy_phy_write(dev, 0x0058, 0x000D);
            if (phy->analog == 0)
                  b43legacy_phy_write(dev, 0x0003, 0x0122);
            else
                  b43legacy_phy_write(dev, 0x000A,
                                  b43legacy_phy_read(dev, 0x000A)
                                  | 0x2000);
            b43legacy_phy_write(dev, 0x0814,
                            b43legacy_phy_read(dev, 0x0814) | 0x0004);
            b43legacy_phy_write(dev, 0x0815,
                            b43legacy_phy_read(dev, 0x0815) & 0xFFFB);
            b43legacy_phy_write(dev, 0x0003,
                            (b43legacy_phy_read(dev, 0x0003) & 0xFF9F)
                            | 0x0040);
            b43legacy_radio_write16(dev, 0x007A,
                              b43legacy_radio_read16(dev, 0x007A)
                              | 0x000F);
            b43legacy_set_all_gains(dev, 3, 0, 1);
            b43legacy_radio_write16(dev, 0x0043,
                              (b43legacy_radio_read16(dev, 0x0043)
                              & 0x00F0) | 0x000F);
            udelay(30);
            v47F = (s16)((b43legacy_phy_read(dev, 0x047F) >> 8) & 0x003F);
            if (v47F >= 0x20)
                  v47F -= 0x40;
            if (v47F == -32) {
                  for (i = 0; i < 4; i++) {
                        b43legacy_radio_write16(dev, 0x007B, i);
                        udelay(20);
                        v47F = (s16)((b43legacy_phy_read(dev, 0x047F) >>
                                                 8) & 0x003F);
                        if (v47F >= 0x20)
                              v47F -= 0x40;
                        if (v47F > -31 && saved == 0xFFFF)
                              saved = i;
                  }
                  if (saved == 0xFFFF)
                        saved = 3;
            } else
                  saved = 0;
      }
      b43legacy_radio_write16(dev, 0x007B, saved);

      if (phy->rev >= 6) {
            b43legacy_phy_write(dev, 0x002E, backup[12]);
            b43legacy_phy_write(dev, 0x002F, backup[13]);
            b43legacy_phy_write(dev, 0x080F, backup[14]);
            b43legacy_phy_write(dev, 0x0810, backup[15]);
      }
      b43legacy_phy_write(dev, 0x0814, backup[3]);
      b43legacy_phy_write(dev, 0x0815, backup[4]);
      b43legacy_phy_write(dev, 0x005A, backup[5]);
      b43legacy_phy_write(dev, 0x0059, backup[6]);
      b43legacy_phy_write(dev, 0x0058, backup[7]);
      b43legacy_phy_write(dev, 0x000A, backup[8]);
      b43legacy_phy_write(dev, 0x0003, backup[9]);
      b43legacy_radio_write16(dev, 0x0043, backup[11]);
      b43legacy_radio_write16(dev, 0x007A, backup[10]);
      b43legacy_phy_write(dev, 0x0802,
                      b43legacy_phy_read(dev, 0x0802) | 0x1 | 0x2);
      b43legacy_phy_write(dev, 0x0429,
                      b43legacy_phy_read(dev, 0x0429) | 0x8000);
      b43legacy_set_original_gains(dev);
      if (phy->rev >= 6) {
            b43legacy_phy_write(dev, 0x0801, backup[16]);
            b43legacy_phy_write(dev, 0x0060, backup[17]);
            b43legacy_phy_write(dev, 0x0014, backup[18]);
            b43legacy_phy_write(dev, 0x0478, backup[19]);
      }
      b43legacy_phy_write(dev, 0x0001, backup[0]);
      b43legacy_phy_write(dev, 0x0812, backup[2]);
      b43legacy_phy_write(dev, 0x0811, backup[1]);
}

void b43legacy_calc_nrssi_slope(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;
      u16 backup[18] = { 0 };
      u16 tmp;
      s16 nrssi0;
      s16 nrssi1;

      switch (phy->type) {
      case B43legacy_PHYTYPE_B:
            backup[0] = b43legacy_radio_read16(dev, 0x007A);
            backup[1] = b43legacy_radio_read16(dev, 0x0052);
            backup[2] = b43legacy_radio_read16(dev, 0x0043);
            backup[3] = b43legacy_phy_read(dev, 0x0030);
            backup[4] = b43legacy_phy_read(dev, 0x0026);
            backup[5] = b43legacy_phy_read(dev, 0x0015);
            backup[6] = b43legacy_phy_read(dev, 0x002A);
            backup[7] = b43legacy_phy_read(dev, 0x0020);
            backup[8] = b43legacy_phy_read(dev, 0x005A);
            backup[9] = b43legacy_phy_read(dev, 0x0059);
            backup[10] = b43legacy_phy_read(dev, 0x0058);
            backup[11] = b43legacy_read16(dev, 0x03E2);
            backup[12] = b43legacy_read16(dev, 0x03E6);
            backup[13] = b43legacy_read16(dev, B43legacy_MMIO_CHANNEL_EXT);

            tmp  = b43legacy_radio_read16(dev, 0x007A);
            tmp &= (phy->rev >= 5) ? 0x007F : 0x000F;
            b43legacy_radio_write16(dev, 0x007A, tmp);
            b43legacy_phy_write(dev, 0x0030, 0x00FF);
            b43legacy_write16(dev, 0x03EC, 0x7F7F);
            b43legacy_phy_write(dev, 0x0026, 0x0000);
            b43legacy_phy_write(dev, 0x0015,
                            b43legacy_phy_read(dev, 0x0015) | 0x0020);
            b43legacy_phy_write(dev, 0x002A, 0x08A3);
            b43legacy_radio_write16(dev, 0x007A,
                              b43legacy_radio_read16(dev, 0x007A)
                              | 0x0080);

            nrssi0 = (s16)b43legacy_phy_read(dev, 0x0027);
            b43legacy_radio_write16(dev, 0x007A,
                              b43legacy_radio_read16(dev, 0x007A)
                              & 0x007F);
            if (phy->analog >= 2)
                  b43legacy_write16(dev, 0x03E6, 0x0040);
            else if (phy->analog == 0)
                  b43legacy_write16(dev, 0x03E6, 0x0122);
            else
                  b43legacy_write16(dev, B43legacy_MMIO_CHANNEL_EXT,
                                b43legacy_read16(dev,
                                B43legacy_MMIO_CHANNEL_EXT) & 0x2000);
            b43legacy_phy_write(dev, 0x0020, 0x3F3F);
            b43legacy_phy_write(dev, 0x0015, 0xF330);
            b43legacy_radio_write16(dev, 0x005A, 0x0060);
            b43legacy_radio_write16(dev, 0x0043,
                              b43legacy_radio_read16(dev, 0x0043)
                              & 0x00F0);
            b43legacy_phy_write(dev, 0x005A, 0x0480);
            b43legacy_phy_write(dev, 0x0059, 0x0810);
            b43legacy_phy_write(dev, 0x0058, 0x000D);
            udelay(20);

            nrssi1 = (s16)b43legacy_phy_read(dev, 0x0027);
            b43legacy_phy_write(dev, 0x0030, backup[3]);
            b43legacy_radio_write16(dev, 0x007A, backup[0]);
            b43legacy_write16(dev, 0x03E2, backup[11]);
            b43legacy_phy_write(dev, 0x0026, backup[4]);
            b43legacy_phy_write(dev, 0x0015, backup[5]);
            b43legacy_phy_write(dev, 0x002A, backup[6]);
            b43legacy_synth_pu_workaround(dev, phy->channel);
            if (phy->analog != 0)
                  b43legacy_write16(dev, 0x03F4, backup[13]);

            b43legacy_phy_write(dev, 0x0020, backup[7]);
            b43legacy_phy_write(dev, 0x005A, backup[8]);
            b43legacy_phy_write(dev, 0x0059, backup[9]);
            b43legacy_phy_write(dev, 0x0058, backup[10]);
            b43legacy_radio_write16(dev, 0x0052, backup[1]);
            b43legacy_radio_write16(dev, 0x0043, backup[2]);

            if (nrssi0 == nrssi1)
                  phy->nrssislope = 0x00010000;
            else
                  phy->nrssislope = 0x00400000 / (nrssi0 - nrssi1);

            if (nrssi0 <= -4) {
                  phy->nrssi[0] = nrssi0;
                  phy->nrssi[1] = nrssi1;
            }
            break;
      case B43legacy_PHYTYPE_G:
            if (phy->radio_rev >= 9)
                  return;
            if (phy->radio_rev == 8)
                  b43legacy_calc_nrssi_offset(dev);

            b43legacy_phy_write(dev, B43legacy_PHY_G_CRS,
                            b43legacy_phy_read(dev, B43legacy_PHY_G_CRS)
                            & 0x7FFF);
            b43legacy_phy_write(dev, 0x0802,
                            b43legacy_phy_read(dev, 0x0802) & 0xFFFC);
            backup[7] = b43legacy_read16(dev, 0x03E2);
            b43legacy_write16(dev, 0x03E2,
                          b43legacy_read16(dev, 0x03E2) | 0x8000);
            backup[0] = b43legacy_radio_read16(dev, 0x007A);
            backup[1] = b43legacy_radio_read16(dev, 0x0052);
            backup[2] = b43legacy_radio_read16(dev, 0x0043);
            backup[3] = b43legacy_phy_read(dev, 0x0015);
            backup[4] = b43legacy_phy_read(dev, 0x005A);
            backup[5] = b43legacy_phy_read(dev, 0x0059);
            backup[6] = b43legacy_phy_read(dev, 0x0058);
            backup[8] = b43legacy_read16(dev, 0x03E6);
            backup[9] = b43legacy_read16(dev, B43legacy_MMIO_CHANNEL_EXT);
            if (phy->rev >= 3) {
                  backup[10] = b43legacy_phy_read(dev, 0x002E);
                  backup[11] = b43legacy_phy_read(dev, 0x002F);
                  backup[12] = b43legacy_phy_read(dev, 0x080F);
                  backup[13] = b43legacy_phy_read(dev,
                                    B43legacy_PHY_G_LO_CONTROL);
                  backup[14] = b43legacy_phy_read(dev, 0x0801);
                  backup[15] = b43legacy_phy_read(dev, 0x0060);
                  backup[16] = b43legacy_phy_read(dev, 0x0014);
                  backup[17] = b43legacy_phy_read(dev, 0x0478);
                  b43legacy_phy_write(dev, 0x002E, 0);
                  b43legacy_phy_write(dev, B43legacy_PHY_G_LO_CONTROL, 0);
                  switch (phy->rev) {
                  case 4: case 6: case 7:
                        b43legacy_phy_write(dev, 0x0478,
                                        b43legacy_phy_read(dev,
                                        0x0478) | 0x0100);
                        b43legacy_phy_write(dev, 0x0801,
                                        b43legacy_phy_read(dev,
                                        0x0801) | 0x0040);
                        break;
                  case 3: case 5:
                        b43legacy_phy_write(dev, 0x0801,
                                        b43legacy_phy_read(dev,
                                        0x0801) & 0xFFBF);
                        break;
                  }
                  b43legacy_phy_write(dev, 0x0060,
                                  b43legacy_phy_read(dev, 0x0060)
                                  | 0x0040);
                  b43legacy_phy_write(dev, 0x0014,
                                  b43legacy_phy_read(dev, 0x0014)
                                  | 0x0200);
            }
            b43legacy_radio_write16(dev, 0x007A,
                              b43legacy_radio_read16(dev, 0x007A)
                              | 0x0070);
            b43legacy_set_all_gains(dev, 0, 8, 0);
            b43legacy_radio_write16(dev, 0x007A,
                              b43legacy_radio_read16(dev, 0x007A)
                              & 0x00F7);
            if (phy->rev >= 2) {
                  b43legacy_phy_write(dev, 0x0811,
                                  (b43legacy_phy_read(dev, 0x0811)
                                  & 0xFFCF) | 0x0030);
                  b43legacy_phy_write(dev, 0x0812,
                                  (b43legacy_phy_read(dev, 0x0812)
                                  & 0xFFCF) | 0x0010);
            }
            b43legacy_radio_write16(dev, 0x007A,
                              b43legacy_radio_read16(dev, 0x007A)
                              | 0x0080);
            udelay(20);

            nrssi0 = (s16)((b43legacy_phy_read(dev, 0x047F) >> 8) & 0x003F);
            if (nrssi0 >= 0x0020)
                  nrssi0 -= 0x0040;

            b43legacy_radio_write16(dev, 0x007A,
                              b43legacy_radio_read16(dev, 0x007A)
                              & 0x007F);
            if (phy->analog >= 2)
                  b43legacy_phy_write(dev, 0x0003,
                                  (b43legacy_phy_read(dev, 0x0003)
                                  & 0xFF9F) | 0x0040);

            b43legacy_write16(dev, B43legacy_MMIO_CHANNEL_EXT,
                          b43legacy_read16(dev,
                          B43legacy_MMIO_CHANNEL_EXT) | 0x2000);
            b43legacy_radio_write16(dev, 0x007A,
                              b43legacy_radio_read16(dev, 0x007A)
                              | 0x000F);
            b43legacy_phy_write(dev, 0x0015, 0xF330);
            if (phy->rev >= 2) {
                  b43legacy_phy_write(dev, 0x0812,
                                  (b43legacy_phy_read(dev, 0x0812)
                                  & 0xFFCF) | 0x0020);
                  b43legacy_phy_write(dev, 0x0811,
                                  (b43legacy_phy_read(dev, 0x0811)
                                  & 0xFFCF) | 0x0020);
            }

            b43legacy_set_all_gains(dev, 3, 0, 1);
            if (phy->radio_rev == 8)
                  b43legacy_radio_write16(dev, 0x0043, 0x001F);
            else {
                  tmp = b43legacy_radio_read16(dev, 0x0052) & 0xFF0F;
                  b43legacy_radio_write16(dev, 0x0052, tmp | 0x0060);
                  tmp = b43legacy_radio_read16(dev, 0x0043) & 0xFFF0;
                  b43legacy_radio_write16(dev, 0x0043, tmp | 0x0009);
            }
            b43legacy_phy_write(dev, 0x005A, 0x0480);
            b43legacy_phy_write(dev, 0x0059, 0x0810);
            b43legacy_phy_write(dev, 0x0058, 0x000D);
            udelay(20);
            nrssi1 = (s16)((b43legacy_phy_read(dev, 0x047F) >> 8) & 0x003F);
            if (nrssi1 >= 0x0020)
                  nrssi1 -= 0x0040;
            if (nrssi0 == nrssi1)
                  phy->nrssislope = 0x00010000;
            else
                  phy->nrssislope = 0x00400000 / (nrssi0 - nrssi1);
            if (nrssi0 >= -4) {
                  phy->nrssi[0] = nrssi1;
                  phy->nrssi[1] = nrssi0;
            }
            if (phy->rev >= 3) {
                  b43legacy_phy_write(dev, 0x002E, backup[10]);
                  b43legacy_phy_write(dev, 0x002F, backup[11]);
                  b43legacy_phy_write(dev, 0x080F, backup[12]);
                  b43legacy_phy_write(dev, B43legacy_PHY_G_LO_CONTROL,
                                  backup[13]);
            }
            if (phy->rev >= 2) {
                  b43legacy_phy_write(dev, 0x0812,
                                  b43legacy_phy_read(dev, 0x0812)
                                  & 0xFFCF);
                  b43legacy_phy_write(dev, 0x0811,
                                  b43legacy_phy_read(dev, 0x0811)
                                  & 0xFFCF);
            }

            b43legacy_radio_write16(dev, 0x007A, backup[0]);
            b43legacy_radio_write16(dev, 0x0052, backup[1]);
            b43legacy_radio_write16(dev, 0x0043, backup[2]);
            b43legacy_write16(dev, 0x03E2, backup[7]);
            b43legacy_write16(dev, 0x03E6, backup[8]);
            b43legacy_write16(dev, B43legacy_MMIO_CHANNEL_EXT, backup[9]);
            b43legacy_phy_write(dev, 0x0015, backup[3]);
            b43legacy_phy_write(dev, 0x005A, backup[4]);
            b43legacy_phy_write(dev, 0x0059, backup[5]);
            b43legacy_phy_write(dev, 0x0058, backup[6]);
            b43legacy_synth_pu_workaround(dev, phy->channel);
            b43legacy_phy_write(dev, 0x0802,
                            b43legacy_phy_read(dev, 0x0802) | 0x0003);
            b43legacy_set_original_gains(dev);
            b43legacy_phy_write(dev, B43legacy_PHY_G_CRS,
                            b43legacy_phy_read(dev, B43legacy_PHY_G_CRS)
                            | 0x8000);
            if (phy->rev >= 3) {
                  b43legacy_phy_write(dev, 0x0801, backup[14]);
                  b43legacy_phy_write(dev, 0x0060, backup[15]);
                  b43legacy_phy_write(dev, 0x0014, backup[16]);
                  b43legacy_phy_write(dev, 0x0478, backup[17]);
            }
            b43legacy_nrssi_mem_update(dev);
            b43legacy_calc_nrssi_threshold(dev);
            break;
      default:
            B43legacy_BUG_ON(1);
      }
}

void b43legacy_calc_nrssi_threshold(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;
      s32 threshold;
      s32 a;
      s32 b;
      s16 tmp16;
      u16 tmp_u16;

      switch (phy->type) {
      case B43legacy_PHYTYPE_B: {
            if (phy->radio_ver != 0x2050)
                  return;
            if (!(dev->dev->bus->sprom.r1.boardflags_lo &
                B43legacy_BFL_RSSI))
                  return;

            if (phy->radio_rev >= 6) {
                  threshold = (phy->nrssi[1] - phy->nrssi[0]) * 32;
                  threshold += 20 * (phy->nrssi[0] + 1);
                  threshold /= 40;
            } else
                  threshold = phy->nrssi[1] - 5;

            threshold = limit_value(threshold, 0, 0x3E);
            b43legacy_phy_read(dev, 0x0020); /* dummy read */
            b43legacy_phy_write(dev, 0x0020, (((u16)threshold) << 8)
                            | 0x001C);

            if (phy->radio_rev >= 6) {
                  b43legacy_phy_write(dev, 0x0087, 0x0E0D);
                  b43legacy_phy_write(dev, 0x0086, 0x0C0B);
                  b43legacy_phy_write(dev, 0x0085, 0x0A09);
                  b43legacy_phy_write(dev, 0x0084, 0x0808);
                  b43legacy_phy_write(dev, 0x0083, 0x0808);
                  b43legacy_phy_write(dev, 0x0082, 0x0604);
                  b43legacy_phy_write(dev, 0x0081, 0x0302);
                  b43legacy_phy_write(dev, 0x0080, 0x0100);
            }
            break;
      }
      case B43legacy_PHYTYPE_G:
            if (!phy->gmode ||
                !(dev->dev->bus->sprom.r1.boardflags_lo &
                B43legacy_BFL_RSSI)) {
                  tmp16 = b43legacy_nrssi_hw_read(dev, 0x20);
                  if (tmp16 >= 0x20)
                        tmp16 -= 0x40;
                  if (tmp16 < 3)
                        b43legacy_phy_write(dev, 0x048A,
                                        (b43legacy_phy_read(dev,
                                        0x048A) & 0xF000) | 0x09EB);
                  else
                        b43legacy_phy_write(dev, 0x048A,
                                        (b43legacy_phy_read(dev,
                                        0x048A) & 0xF000) | 0x0AED);
            } else {
                  if (phy->interfmode ==
                      B43legacy_RADIO_INTERFMODE_NONWLAN) {
                        a = 0xE;
                        b = 0xA;
                  } else if (!phy->aci_wlan_automatic &&
                            phy->aci_enable) {
                        a = 0x13;
                        b = 0x12;
                  } else {
                        a = 0xE;
                        b = 0x11;
                  }

                  a = a * (phy->nrssi[1] - phy->nrssi[0]);
                  a += (phy->nrssi[0] << 6);
                  if (a < 32)
                        a += 31;
                  else
                        a += 32;
                  a = a >> 6;
                  a = limit_value(a, -31, 31);

                  b = b * (phy->nrssi[1] - phy->nrssi[0]);
                  b += (phy->nrssi[0] << 6);
                  if (b < 32)
                        b += 31;
                  else
                        b += 32;
                  b = b >> 6;
                  b = limit_value(b, -31, 31);

                  tmp_u16 = b43legacy_phy_read(dev, 0x048A) & 0xF000;
                  tmp_u16 |= ((u32)b & 0x0000003F);
                  tmp_u16 |= (((u32)a & 0x0000003F) << 6);
                  b43legacy_phy_write(dev, 0x048A, tmp_u16);
            }
            break;
      default:
            B43legacy_BUG_ON(1);
      }
}

/* Stack implementation to save/restore values from the
 * interference mitigation code.
 * It is save to restore values in random order.
 */
static void _stack_save(u32 *_stackptr, size_t *stackidx,
                  u8 id, u16 offset, u16 value)
{
      u32 *stackptr = &(_stackptr[*stackidx]);

      B43legacy_WARN_ON(!((offset & 0xE000) == 0x0000));
      B43legacy_WARN_ON(!((id & 0xF8) == 0x00));
      *stackptr = offset;
      *stackptr |= ((u32)id) << 13;
      *stackptr |= ((u32)value) << 16;
      (*stackidx)++;
      B43legacy_WARN_ON(!(*stackidx < B43legacy_INTERFSTACK_SIZE));
}

static u16 _stack_restore(u32 *stackptr,
                    u8 id, u16 offset)
{
      size_t i;

      B43legacy_WARN_ON(!((offset & 0xE000) == 0x0000));
      B43legacy_WARN_ON(!((id & 0xF8) == 0x00));
      for (i = 0; i < B43legacy_INTERFSTACK_SIZE; i++, stackptr++) {
            if ((*stackptr & 0x00001FFF) != offset)
                  continue;
            if (((*stackptr & 0x00007000) >> 13) != id)
                  continue;
            return ((*stackptr & 0xFFFF0000) >> 16);
      }
      B43legacy_BUG_ON(1);

      return 0;
}

#define phy_stacksave(offset)                         \
      do {                                      \
            _stack_save(stack, &stackidx, 0x1, (offset),    \
                      b43legacy_phy_read(dev, (offset)));   \
      } while (0)
#define phy_stackrestore(offset)                      \
      do {                                      \
            b43legacy_phy_write(dev, (offset),        \
                            _stack_restore(stack, 0x1,      \
                            (offset)));               \
      } while (0)
#define radio_stacksave(offset)                                   \
      do {                                            \
            _stack_save(stack, &stackidx, 0x2, (offset),          \
                      b43legacy_radio_read16(dev, (offset)));     \
      } while (0)
#define radio_stackrestore(offset)                          \
      do {                                            \
            b43legacy_radio_write16(dev, (offset),                \
                              _stack_restore(stack, 0x2,    \
                              (offset)));             \
      } while (0)
#define ilt_stacksave(offset)                         \
      do {                                      \
            _stack_save(stack, &stackidx, 0x3, (offset),    \
                      b43legacy_ilt_read(dev, (offset)));   \
      } while (0)
#define ilt_stackrestore(offset)                      \
      do {                                      \
            b43legacy_ilt_write(dev, (offset),        \
                          _stack_restore(stack, 0x3,  \
                                     (offset)));      \
      } while (0)

static void
b43legacy_radio_interference_mitigation_enable(struct b43legacy_wldev *dev,
                                     int mode)
{
      struct b43legacy_phy *phy = &dev->phy;
      u16 tmp;
      u16 flipped;
      u32 tmp32;
      size_t stackidx = 0;
      u32 *stack = phy->interfstack;

      switch (mode) {
      case B43legacy_RADIO_INTERFMODE_NONWLAN:
            if (phy->rev != 1) {
                  b43legacy_phy_write(dev, 0x042B,
                                  b43legacy_phy_read(dev, 0x042B)
                                  | 0x0800);
                  b43legacy_phy_write(dev, B43legacy_PHY_G_CRS,
                                  b43legacy_phy_read(dev,
                                  B43legacy_PHY_G_CRS) & ~0x4000);
                  break;
            }
            radio_stacksave(0x0078);
            tmp = (b43legacy_radio_read16(dev, 0x0078) & 0x001E);
            flipped = flip_4bit(tmp);
            if (flipped < 10 && flipped >= 8)
                  flipped = 7;
            else if (flipped >= 10)
                  flipped -= 3;
            flipped = flip_4bit(flipped);
            flipped = (flipped << 1) | 0x0020;
            b43legacy_radio_write16(dev, 0x0078, flipped);

            b43legacy_calc_nrssi_threshold(dev);

            phy_stacksave(0x0406);
            b43legacy_phy_write(dev, 0x0406, 0x7E28);

            b43legacy_phy_write(dev, 0x042B,
                            b43legacy_phy_read(dev, 0x042B) | 0x0800);
            b43legacy_phy_write(dev, B43legacy_PHY_RADIO_BITFIELD,
                            b43legacy_phy_read(dev,
                            B43legacy_PHY_RADIO_BITFIELD) | 0x1000);

            phy_stacksave(0x04A0);
            b43legacy_phy_write(dev, 0x04A0,
                            (b43legacy_phy_read(dev, 0x04A0) & 0xC0C0)
                            | 0x0008);
            phy_stacksave(0x04A1);
            b43legacy_phy_write(dev, 0x04A1,
                            (b43legacy_phy_read(dev, 0x04A1) & 0xC0C0)
                            | 0x0605);
            phy_stacksave(0x04A2);
            b43legacy_phy_write(dev, 0x04A2,
                            (b43legacy_phy_read(dev, 0x04A2) & 0xC0C0)
                            | 0x0204);
            phy_stacksave(0x04A8);
            b43legacy_phy_write(dev, 0x04A8,
                            (b43legacy_phy_read(dev, 0x04A8) & 0xC0C0)
                            | 0x0803);
            phy_stacksave(0x04AB);
            b43legacy_phy_write(dev, 0x04AB,
                            (b43legacy_phy_read(dev, 0x04AB) & 0xC0C0)
                            | 0x0605);

            phy_stacksave(0x04A7);
            b43legacy_phy_write(dev, 0x04A7, 0x0002);
            phy_stacksave(0x04A3);
            b43legacy_phy_write(dev, 0x04A3, 0x287A);
            phy_stacksave(0x04A9);
            b43legacy_phy_write(dev, 0x04A9, 0x2027);
            phy_stacksave(0x0493);
            b43legacy_phy_write(dev, 0x0493, 0x32F5);
            phy_stacksave(0x04AA);
            b43legacy_phy_write(dev, 0x04AA, 0x2027);
            phy_stacksave(0x04AC);
            b43legacy_phy_write(dev, 0x04AC, 0x32F5);
            break;
      case B43legacy_RADIO_INTERFMODE_MANUALWLAN:
            if (b43legacy_phy_read(dev, 0x0033) & 0x0800)
                  break;

            phy->aci_enable = 1;

            phy_stacksave(B43legacy_PHY_RADIO_BITFIELD);
            phy_stacksave(B43legacy_PHY_G_CRS);
            if (phy->rev < 2)
                  phy_stacksave(0x0406);
            else {
                  phy_stacksave(0x04C0);
                  phy_stacksave(0x04C1);
            }
            phy_stacksave(0x0033);
            phy_stacksave(0x04A7);
            phy_stacksave(0x04A3);
            phy_stacksave(0x04A9);
            phy_stacksave(0x04AA);
            phy_stacksave(0x04AC);
            phy_stacksave(0x0493);
            phy_stacksave(0x04A1);
            phy_stacksave(0x04A0);
            phy_stacksave(0x04A2);
            phy_stacksave(0x048A);
            phy_stacksave(0x04A8);
            phy_stacksave(0x04AB);
            if (phy->rev == 2) {
                  phy_stacksave(0x04AD);
                  phy_stacksave(0x04AE);
            } else if (phy->rev >= 3) {
                  phy_stacksave(0x04AD);
                  phy_stacksave(0x0415);
                  phy_stacksave(0x0416);
                  phy_stacksave(0x0417);
                  ilt_stacksave(0x1A00 + 0x2);
                  ilt_stacksave(0x1A00 + 0x3);
            }
            phy_stacksave(0x042B);
            phy_stacksave(0x048C);

            b43legacy_phy_write(dev, B43legacy_PHY_RADIO_BITFIELD,
                            b43legacy_phy_read(dev,
                            B43legacy_PHY_RADIO_BITFIELD) & ~0x1000);
            b43legacy_phy_write(dev, B43legacy_PHY_G_CRS,
                            (b43legacy_phy_read(dev,
                            B43legacy_PHY_G_CRS)
                            & 0xFFFC) | 0x0002);

            b43legacy_phy_write(dev, 0x0033, 0x0800);
            b43legacy_phy_write(dev, 0x04A3, 0x2027);
            b43legacy_phy_write(dev, 0x04A9, 0x1CA8);
            b43legacy_phy_write(dev, 0x0493, 0x287A);
            b43legacy_phy_write(dev, 0x04AA, 0x1CA8);
            b43legacy_phy_write(dev, 0x04AC, 0x287A);

            b43legacy_phy_write(dev, 0x04A0,
                            (b43legacy_phy_read(dev, 0x04A0)
                            & 0xFFC0) | 0x001A);
            b43legacy_phy_write(dev, 0x04A7, 0x000D);

            if (phy->rev < 2)
                  b43legacy_phy_write(dev, 0x0406, 0xFF0D);
            else if (phy->rev == 2) {
                  b43legacy_phy_write(dev, 0x04C0, 0xFFFF);
                  b43legacy_phy_write(dev, 0x04C1, 0x00A9);
            } else {
                  b43legacy_phy_write(dev, 0x04C0, 0x00C1);
                  b43legacy_phy_write(dev, 0x04C1, 0x0059);
            }

            b43legacy_phy_write(dev, 0x04A1,
                            (b43legacy_phy_read(dev, 0x04A1)
                            & 0xC0FF) | 0x1800);
            b43legacy_phy_write(dev, 0x04A1,
                            (b43legacy_phy_read(dev, 0x04A1)
                            & 0xFFC0) | 0x0015);
            b43legacy_phy_write(dev, 0x04A8,
                            (b43legacy_phy_read(dev, 0x04A8)
                            & 0xCFFF) | 0x1000);
            b43legacy_phy_write(dev, 0x04A8,
                            (b43legacy_phy_read(dev, 0x04A8)
                            & 0xF0FF) | 0x0A00);
            b43legacy_phy_write(dev, 0x04AB,
                            (b43legacy_phy_read(dev, 0x04AB)
                            & 0xCFFF) | 0x1000);
            b43legacy_phy_write(dev, 0x04AB,
                            (b43legacy_phy_read(dev, 0x04AB)
                            & 0xF0FF) | 0x0800);
            b43legacy_phy_write(dev, 0x04AB,
                            (b43legacy_phy_read(dev, 0x04AB)
                            & 0xFFCF) | 0x0010);
            b43legacy_phy_write(dev, 0x04AB,
                            (b43legacy_phy_read(dev, 0x04AB)
                            & 0xFFF0) | 0x0005);
            b43legacy_phy_write(dev, 0x04A8,
                            (b43legacy_phy_read(dev, 0x04A8)
                            & 0xFFCF) | 0x0010);
            b43legacy_phy_write(dev, 0x04A8,
                            (b43legacy_phy_read(dev, 0x04A8)
                            & 0xFFF0) | 0x0006);
            b43legacy_phy_write(dev, 0x04A2,
                            (b43legacy_phy_read(dev, 0x04A2)
                            & 0xF0FF) | 0x0800);
            b43legacy_phy_write(dev, 0x04A0,
                            (b43legacy_phy_read(dev, 0x04A0)
                            & 0xF0FF) | 0x0500);
            b43legacy_phy_write(dev, 0x04A2,
                            (b43legacy_phy_read(dev, 0x04A2)
                            & 0xFFF0) | 0x000B);

            if (phy->rev >= 3) {
                  b43legacy_phy_write(dev, 0x048A,
                                  b43legacy_phy_read(dev, 0x048A)
                                  & ~0x8000);
                  b43legacy_phy_write(dev, 0x0415,
                                  (b43legacy_phy_read(dev, 0x0415)
                                  & 0x8000) | 0x36D8);
                  b43legacy_phy_write(dev, 0x0416,
                                  (b43legacy_phy_read(dev, 0x0416)
                                  & 0x8000) | 0x36D8);
                  b43legacy_phy_write(dev, 0x0417,
                                  (b43legacy_phy_read(dev, 0x0417)
                                  & 0xFE00) | 0x016D);
            } else {
                  b43legacy_phy_write(dev, 0x048A,
                                  b43legacy_phy_read(dev, 0x048A)
                                  | 0x1000);
                  b43legacy_phy_write(dev, 0x048A,
                                  (b43legacy_phy_read(dev, 0x048A)
                                  & 0x9FFF) | 0x2000);
                  tmp32 = b43legacy_shm_read32(dev, B43legacy_SHM_SHARED,
                                  B43legacy_UCODEFLAGS_OFFSET);
                  if (!(tmp32 & 0x800)) {
                        tmp32 |= 0x800;
                        b43legacy_shm_write32(dev, B43legacy_SHM_SHARED,
                                  B43legacy_UCODEFLAGS_OFFSET,
                                  tmp32);
                  }
            }
            if (phy->rev >= 2)
                  b43legacy_phy_write(dev, 0x042B,
                                  b43legacy_phy_read(dev, 0x042B)
                                  | 0x0800);
            b43legacy_phy_write(dev, 0x048C,
                            (b43legacy_phy_read(dev, 0x048C)
                            & 0xF0FF) | 0x0200);
            if (phy->rev == 2) {
                  b43legacy_phy_write(dev, 0x04AE,
                                  (b43legacy_phy_read(dev, 0x04AE)
                                  & 0xFF00) | 0x007F);
                  b43legacy_phy_write(dev, 0x04AD,
                                  (b43legacy_phy_read(dev, 0x04AD)
                                  & 0x00FF) | 0x1300);
            } else if (phy->rev >= 6) {
                  b43legacy_ilt_write(dev, 0x1A00 + 0x3, 0x007F);
                  b43legacy_ilt_write(dev, 0x1A00 + 0x2, 0x007F);
                  b43legacy_phy_write(dev, 0x04AD,
                                  b43legacy_phy_read(dev, 0x04AD)
                                  & 0x00FF);
            }
            b43legacy_calc_nrssi_slope(dev);
            break;
      default:
            B43legacy_BUG_ON(1);
      }
}

static void
b43legacy_radio_interference_mitigation_disable(struct b43legacy_wldev *dev,
                                    int mode)
{
      struct b43legacy_phy *phy = &dev->phy;
      u32 tmp32;
      u32 *stack = phy->interfstack;

      switch (mode) {
      case B43legacy_RADIO_INTERFMODE_NONWLAN:
            if (phy->rev != 1) {
                  b43legacy_phy_write(dev, 0x042B,
                                  b43legacy_phy_read(dev, 0x042B)
                                  & ~0x0800);
                  b43legacy_phy_write(dev, B43legacy_PHY_G_CRS,
                                  b43legacy_phy_read(dev,
                                  B43legacy_PHY_G_CRS) | 0x4000);
                  break;
            }
            phy_stackrestore(0x0078);
            b43legacy_calc_nrssi_threshold(dev);
            phy_stackrestore(0x0406);
            b43legacy_phy_write(dev, 0x042B,
                            b43legacy_phy_read(dev, 0x042B) & ~0x0800);
            if (!dev->bad_frames_preempt)
                  b43legacy_phy_write(dev, B43legacy_PHY_RADIO_BITFIELD,
                                  b43legacy_phy_read(dev,
                                  B43legacy_PHY_RADIO_BITFIELD)
                                  & ~(1 << 11));
            b43legacy_phy_write(dev, B43legacy_PHY_G_CRS,
                            b43legacy_phy_read(dev, B43legacy_PHY_G_CRS)
                            | 0x4000);
            phy_stackrestore(0x04A0);
            phy_stackrestore(0x04A1);
            phy_stackrestore(0x04A2);
            phy_stackrestore(0x04A8);
            phy_stackrestore(0x04AB);
            phy_stackrestore(0x04A7);
            phy_stackrestore(0x04A3);
            phy_stackrestore(0x04A9);
            phy_stackrestore(0x0493);
            phy_stackrestore(0x04AA);
            phy_stackrestore(0x04AC);
            break;
      case B43legacy_RADIO_INTERFMODE_MANUALWLAN:
            if (!(b43legacy_phy_read(dev, 0x0033) & 0x0800))
                  break;

            phy->aci_enable = 0;

            phy_stackrestore(B43legacy_PHY_RADIO_BITFIELD);
            phy_stackrestore(B43legacy_PHY_G_CRS);
            phy_stackrestore(0x0033);
            phy_stackrestore(0x04A3);
            phy_stackrestore(0x04A9);
            phy_stackrestore(0x0493);
            phy_stackrestore(0x04AA);
            phy_stackrestore(0x04AC);
            phy_stackrestore(0x04A0);
            phy_stackrestore(0x04A7);
            if (phy->rev >= 2) {
                  phy_stackrestore(0x04C0);
                  phy_stackrestore(0x04C1);
            } else
                  phy_stackrestore(0x0406);
            phy_stackrestore(0x04A1);
            phy_stackrestore(0x04AB);
            phy_stackrestore(0x04A8);
            if (phy->rev == 2) {
                  phy_stackrestore(0x04AD);
                  phy_stackrestore(0x04AE);
            } else if (phy->rev >= 3) {
                  phy_stackrestore(0x04AD);
                  phy_stackrestore(0x0415);
                  phy_stackrestore(0x0416);
                  phy_stackrestore(0x0417);
                  ilt_stackrestore(0x1A00 + 0x2);
                  ilt_stackrestore(0x1A00 + 0x3);
            }
            phy_stackrestore(0x04A2);
            phy_stackrestore(0x04A8);
            phy_stackrestore(0x042B);
            phy_stackrestore(0x048C);
            tmp32 = b43legacy_shm_read32(dev, B43legacy_SHM_SHARED,
                                   B43legacy_UCODEFLAGS_OFFSET);
            if (tmp32 & 0x800) {
                  tmp32 &= ~0x800;
                  b43legacy_shm_write32(dev, B43legacy_SHM_SHARED,
                                    B43legacy_UCODEFLAGS_OFFSET,
                                    tmp32);
            }
            b43legacy_calc_nrssi_slope(dev);
            break;
      default:
            B43legacy_BUG_ON(1);
      }
}

#undef phy_stacksave
#undef phy_stackrestore
#undef radio_stacksave
#undef radio_stackrestore
#undef ilt_stacksave
#undef ilt_stackrestore

int b43legacy_radio_set_interference_mitigation(struct b43legacy_wldev *dev,
                                    int mode)
{
      struct b43legacy_phy *phy = &dev->phy;
      int currentmode;

      if ((phy->type != B43legacy_PHYTYPE_G) ||
          (phy->rev == 0) || (!phy->gmode))
            return -ENODEV;

      phy->aci_wlan_automatic = 0;
      switch (mode) {
      case B43legacy_RADIO_INTERFMODE_AUTOWLAN:
            phy->aci_wlan_automatic = 1;
            if (phy->aci_enable)
                  mode = B43legacy_RADIO_INTERFMODE_MANUALWLAN;
            else
                  mode = B43legacy_RADIO_INTERFMODE_NONE;
            break;
      case B43legacy_RADIO_INTERFMODE_NONE:
      case B43legacy_RADIO_INTERFMODE_NONWLAN:
      case B43legacy_RADIO_INTERFMODE_MANUALWLAN:
            break;
      default:
            return -EINVAL;
      }

      currentmode = phy->interfmode;
      if (currentmode == mode)
            return 0;
      if (currentmode != B43legacy_RADIO_INTERFMODE_NONE)
            b43legacy_radio_interference_mitigation_disable(dev,
                                                currentmode);

      if (mode == B43legacy_RADIO_INTERFMODE_NONE) {
            phy->aci_enable = 0;
            phy->aci_hw_rssi = 0;
      } else
            b43legacy_radio_interference_mitigation_enable(dev, mode);
      phy->interfmode = mode;

      return 0;
}

u16 b43legacy_radio_calibrationvalue(struct b43legacy_wldev *dev)
{
      u16 reg;
      u16 index;
      u16 ret;

      reg = b43legacy_radio_read16(dev, 0x0060);
      index = (reg & 0x001E) >> 1;
      ret = rcc_table[index] << 1;
      ret |= (reg & 0x0001);
      ret |= 0x0020;

      return ret;
}

#define LPD(L, P, D)    (((L) << 2) | ((P) << 1) | ((D) << 0))
static u16 b43legacy_get_812_value(struct b43legacy_wldev *dev, u8 lpd)
{
      struct b43legacy_phy *phy = &dev->phy;
      u16 loop_or = 0;
      u16 adj_loopback_gain = phy->loopback_gain[0];
      u8 loop;
      u16 extern_lna_control;

      if (!phy->gmode)
            return 0;
      if (!has_loopback_gain(phy)) {
            if (phy->rev < 7 || !(dev->dev->bus->sprom.r1.boardflags_lo
                & B43legacy_BFL_EXTLNA)) {
                  switch (lpd) {
                  case LPD(0, 1, 1):
                        return 0x0FB2;
                  case LPD(0, 0, 1):
                        return 0x00B2;
                  case LPD(1, 0, 1):
                        return 0x30B2;
                  case LPD(1, 0, 0):
                        return 0x30B3;
                  default:
                        B43legacy_BUG_ON(1);
                  }
            } else {
                  switch (lpd) {
                  case LPD(0, 1, 1):
                        return 0x8FB2;
                  case LPD(0, 0, 1):
                        return 0x80B2;
                  case LPD(1, 0, 1):
                        return 0x20B2;
                  case LPD(1, 0, 0):
                        return 0x20B3;
                  default:
                        B43legacy_BUG_ON(1);
                  }
            }
      } else {
            if (phy->radio_rev == 8)
                  adj_loopback_gain += 0x003E;
            else
                  adj_loopback_gain += 0x0026;
            if (adj_loopback_gain >= 0x46) {
                  adj_loopback_gain -= 0x46;
                  extern_lna_control = 0x3000;
            } else if (adj_loopback_gain >= 0x3A) {
                  adj_loopback_gain -= 0x3A;
                  extern_lna_control = 0x2000;
            } else if (adj_loopback_gain >= 0x2E) {
                  adj_loopback_gain -= 0x2E;
                  extern_lna_control = 0x1000;
            } else {
                  adj_loopback_gain -= 0x10;
                  extern_lna_control = 0x0000;
            }
            for (loop = 0; loop < 16; loop++) {
                  u16 tmp = adj_loopback_gain - 6 * loop;
                  if (tmp < 6)
                        break;
            }

            loop_or = (loop << 8) | extern_lna_control;
            if (phy->rev >= 7 && dev->dev->bus->sprom.r1.boardflags_lo
                & B43legacy_BFL_EXTLNA) {
                  if (extern_lna_control)
                        loop_or |= 0x8000;
                  switch (lpd) {
                  case LPD(0, 1, 1):
                        return 0x8F92;
                  case LPD(0, 0, 1):
                        return (0x8092 | loop_or);
                  case LPD(1, 0, 1):
                        return (0x2092 | loop_or);
                  case LPD(1, 0, 0):
                        return (0x2093 | loop_or);
                  default:
                        B43legacy_BUG_ON(1);
                  }
            } else {
                  switch (lpd) {
                  case LPD(0, 1, 1):
                        return 0x0F92;
                  case LPD(0, 0, 1):
                  case LPD(1, 0, 1):
                        return (0x0092 | loop_or);
                  case LPD(1, 0, 0):
                        return (0x0093 | loop_or);
                  default:
                        B43legacy_BUG_ON(1);
                  }
            }
      }
      return 0;
}

u16 b43legacy_radio_init2050(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;
      u16 backup[21] = { 0 };
      u16 ret;
      u16 i;
      u16 j;
      u32 tmp1 = 0;
      u32 tmp2 = 0;

      backup[0] = b43legacy_radio_read16(dev, 0x0043);
      backup[14] = b43legacy_radio_read16(dev, 0x0051);
      backup[15] = b43legacy_radio_read16(dev, 0x0052);
      backup[1] = b43legacy_phy_read(dev, 0x0015);
      backup[16] = b43legacy_phy_read(dev, 0x005A);
      backup[17] = b43legacy_phy_read(dev, 0x0059);
      backup[18] = b43legacy_phy_read(dev, 0x0058);
      if (phy->type == B43legacy_PHYTYPE_B) {
            backup[2] = b43legacy_phy_read(dev, 0x0030);
            backup[3] = b43legacy_read16(dev, 0x03EC);
            b43legacy_phy_write(dev, 0x0030, 0x00FF);
            b43legacy_write16(dev, 0x03EC, 0x3F3F);
      } else {
            if (phy->gmode) {
                  backup[4] = b43legacy_phy_read(dev, 0x0811);
                  backup[5] = b43legacy_phy_read(dev, 0x0812);
                  backup[6] = b43legacy_phy_read(dev, 0x0814);
                  backup[7] = b43legacy_phy_read(dev, 0x0815);
                  backup[8] = b43legacy_phy_read(dev,
                                           B43legacy_PHY_G_CRS);
                  backup[9] = b43legacy_phy_read(dev, 0x0802);
                  b43legacy_phy_write(dev, 0x0814,
                                  (b43legacy_phy_read(dev, 0x0814)
                                  | 0x0003));
                  b43legacy_phy_write(dev, 0x0815,
                                  (b43legacy_phy_read(dev, 0x0815)
                                  & 0xFFFC));
                  b43legacy_phy_write(dev, B43legacy_PHY_G_CRS,
                                  (b43legacy_phy_read(dev,
                                  B43legacy_PHY_G_CRS) & 0x7FFF));
                  b43legacy_phy_write(dev, 0x0802,
                                  (b43legacy_phy_read(dev, 0x0802)
                                  & 0xFFFC));
                  if (phy->rev > 1) { /* loopback gain enabled */
                        backup[19] = b43legacy_phy_read(dev, 0x080F);
                        backup[20] = b43legacy_phy_read(dev, 0x0810);
                        if (phy->rev >= 3)
                              b43legacy_phy_write(dev, 0x080F,
                                              0xC020);
                        else
                              b43legacy_phy_write(dev, 0x080F,
                                              0x8020);
                        b43legacy_phy_write(dev, 0x0810, 0x0000);
                  }
                  b43legacy_phy_write(dev, 0x0812,
                                  b43legacy_get_812_value(dev,
                                  LPD(0, 1, 1)));
                  if (phy->rev < 7 ||
                      !(dev->dev->bus->sprom.r1.boardflags_lo
                      & B43legacy_BFL_EXTLNA))
                        b43legacy_phy_write(dev, 0x0811, 0x01B3);
                  else
                        b43legacy_phy_write(dev, 0x0811, 0x09B3);
            }
      }
      b43legacy_write16(dev, B43legacy_MMIO_PHY_RADIO,
                  (b43legacy_read16(dev, B43legacy_MMIO_PHY_RADIO)
                                | 0x8000));
      backup[10] = b43legacy_phy_read(dev, 0x0035);
      b43legacy_phy_write(dev, 0x0035,
                      (b43legacy_phy_read(dev, 0x0035) & 0xFF7F));
      backup[11] = b43legacy_read16(dev, 0x03E6);
      backup[12] = b43legacy_read16(dev, B43legacy_MMIO_CHANNEL_EXT);

      /* Initialization */
      if (phy->analog == 0)
            b43legacy_write16(dev, 0x03E6, 0x0122);
      else {
            if (phy->analog >= 2)
                  b43legacy_phy_write(dev, 0x0003,
                                  (b43legacy_phy_read(dev, 0x0003)
                                  & 0xFFBF) | 0x0040);
            b43legacy_write16(dev, B43legacy_MMIO_CHANNEL_EXT,
                          (b43legacy_read16(dev,
                          B43legacy_MMIO_CHANNEL_EXT) | 0x2000));
      }

      ret = b43legacy_radio_calibrationvalue(dev);

      if (phy->type == B43legacy_PHYTYPE_B)
            b43legacy_radio_write16(dev, 0x0078, 0x0026);

      if (phy->gmode)
            b43legacy_phy_write(dev, 0x0812,
                            b43legacy_get_812_value(dev,
                            LPD(0, 1, 1)));
      b43legacy_phy_write(dev, 0x0015, 0xBFAF);
      b43legacy_phy_write(dev, 0x002B, 0x1403);
      if (phy->gmode)
            b43legacy_phy_write(dev, 0x0812,
                            b43legacy_get_812_value(dev,
                            LPD(0, 0, 1)));
      b43legacy_phy_write(dev, 0x0015, 0xBFA0);
      b43legacy_radio_write16(dev, 0x0051,
                        (b43legacy_radio_read16(dev, 0x0051)
                        | 0x0004));
      if (phy->radio_rev == 8)
            b43legacy_radio_write16(dev, 0x0043, 0x001F);
      else {
            b43legacy_radio_write16(dev, 0x0052, 0x0000);
            b43legacy_radio_write16(dev, 0x0043,
                              (b43legacy_radio_read16(dev, 0x0043)
                              & 0xFFF0) | 0x0009);
      }
      b43legacy_phy_write(dev, 0x0058, 0x0000);

      for (i = 0; i < 16; i++) {
            b43legacy_phy_write(dev, 0x005A, 0x0480);
            b43legacy_phy_write(dev, 0x0059, 0xC810);
            b43legacy_phy_write(dev, 0x0058, 0x000D);
            if (phy->gmode)
                  b43legacy_phy_write(dev, 0x0812,
                                  b43legacy_get_812_value(dev,
                                  LPD(1, 0, 1)));
            b43legacy_phy_write(dev, 0x0015, 0xAFB0);
            udelay(10);
            if (phy->gmode)
                  b43legacy_phy_write(dev, 0x0812,
                                  b43legacy_get_812_value(dev,
                                  LPD(1, 0, 1)));
            b43legacy_phy_write(dev, 0x0015, 0xEFB0);
            udelay(10);
            if (phy->gmode)
                  b43legacy_phy_write(dev, 0x0812,
                                  b43legacy_get_812_value(dev,
                                  LPD(1, 0, 0)));
            b43legacy_phy_write(dev, 0x0015, 0xFFF0);
            udelay(20);
            tmp1 += b43legacy_phy_read(dev, 0x002D);
            b43legacy_phy_write(dev, 0x0058, 0x0000);
            if (phy->gmode)
                  b43legacy_phy_write(dev, 0x0812,
                                  b43legacy_get_812_value(dev,
                                  LPD(1, 0, 1)));
            b43legacy_phy_write(dev, 0x0015, 0xAFB0);
      }

      tmp1++;
      tmp1 >>= 9;
      udelay(10);
      b43legacy_phy_write(dev, 0x0058, 0x0000);

      for (i = 0; i < 16; i++) {
            b43legacy_radio_write16(dev, 0x0078, (flip_4bit(i) << 1)
                              | 0x0020);
            backup[13] = b43legacy_radio_read16(dev, 0x0078);
            udelay(10);
            for (j = 0; j < 16; j++) {
                  b43legacy_phy_write(dev, 0x005A, 0x0D80);
                  b43legacy_phy_write(dev, 0x0059, 0xC810);
                  b43legacy_phy_write(dev, 0x0058, 0x000D);
                  if (phy->gmode)
                        b43legacy_phy_write(dev, 0x0812,
                                        b43legacy_get_812_value(dev,
                                        LPD(1, 0, 1)));
                  b43legacy_phy_write(dev, 0x0015, 0xAFB0);
                  udelay(10);
                  if (phy->gmode)
                        b43legacy_phy_write(dev, 0x0812,
                                        b43legacy_get_812_value(dev,
                                        LPD(1, 0, 1)));
                  b43legacy_phy_write(dev, 0x0015, 0xEFB0);
                  udelay(10);
                  if (phy->gmode)
                        b43legacy_phy_write(dev, 0x0812,
                                        b43legacy_get_812_value(dev,
                                        LPD(1, 0, 0)));
                  b43legacy_phy_write(dev, 0x0015, 0xFFF0);
                  udelay(10);
                  tmp2 += b43legacy_phy_read(dev, 0x002D);
                  b43legacy_phy_write(dev, 0x0058, 0x0000);
                  if (phy->gmode)
                        b43legacy_phy_write(dev, 0x0812,
                                        b43legacy_get_812_value(dev,
                                        LPD(1, 0, 1)));
                  b43legacy_phy_write(dev, 0x0015, 0xAFB0);
            }
            tmp2++;
            tmp2 >>= 8;
            if (tmp1 < tmp2)
                  break;
      }

      /* Restore the registers */
      b43legacy_phy_write(dev, 0x0015, backup[1]);
      b43legacy_radio_write16(dev, 0x0051, backup[14]);
      b43legacy_radio_write16(dev, 0x0052, backup[15]);
      b43legacy_radio_write16(dev, 0x0043, backup[0]);
      b43legacy_phy_write(dev, 0x005A, backup[16]);
      b43legacy_phy_write(dev, 0x0059, backup[17]);
      b43legacy_phy_write(dev, 0x0058, backup[18]);
      b43legacy_write16(dev, 0x03E6, backup[11]);
      if (phy->analog != 0)
            b43legacy_write16(dev, B43legacy_MMIO_CHANNEL_EXT, backup[12]);
      b43legacy_phy_write(dev, 0x0035, backup[10]);
      b43legacy_radio_selectchannel(dev, phy->channel, 1);
      if (phy->type == B43legacy_PHYTYPE_B) {
            b43legacy_phy_write(dev, 0x0030, backup[2]);
            b43legacy_write16(dev, 0x03EC, backup[3]);
      } else {
            if (phy->gmode) {
                  b43legacy_write16(dev, B43legacy_MMIO_PHY_RADIO,
                                (b43legacy_read16(dev,
                                B43legacy_MMIO_PHY_RADIO) & 0x7FFF));
                  b43legacy_phy_write(dev, 0x0811, backup[4]);
                  b43legacy_phy_write(dev, 0x0812, backup[5]);
                  b43legacy_phy_write(dev, 0x0814, backup[6]);
                  b43legacy_phy_write(dev, 0x0815, backup[7]);
                  b43legacy_phy_write(dev, B43legacy_PHY_G_CRS,
                                  backup[8]);
                  b43legacy_phy_write(dev, 0x0802, backup[9]);
                  if (phy->rev > 1) {
                        b43legacy_phy_write(dev, 0x080F, backup[19]);
                        b43legacy_phy_write(dev, 0x0810, backup[20]);
                  }
            }
      }
      if (i >= 15)
            ret = backup[13];

      return ret;
}

static inline
u16 freq_r3A_value(u16 frequency)
{
      u16 value;

      if (frequency < 5091)
            value = 0x0040;
      else if (frequency < 5321)
            value = 0x0000;
      else if (frequency < 5806)
            value = 0x0080;
      else
            value = 0x0040;

      return value;
}

void b43legacy_radio_set_tx_iq(struct b43legacy_wldev *dev)
{
      static const u8 data_high[5] = { 0x00, 0x40, 0x80, 0x90, 0xD0 };
      static const u8 data_low[5]  = { 0x00, 0x01, 0x05, 0x06, 0x0A };
      u16 tmp = b43legacy_radio_read16(dev, 0x001E);
      int i;
      int j;

      for (i = 0; i < 5; i++) {
            for (j = 0; j < 5; j++) {
                  if (tmp == (data_high[i] | data_low[j])) {
                        b43legacy_phy_write(dev, 0x0069, (i - j) << 8 |
                                        0x00C0);
                        return;
                  }
            }
      }
}

int b43legacy_radio_selectchannel(struct b43legacy_wldev *dev,
                          u8 channel,
                          int synthetic_pu_workaround)
{
      struct b43legacy_phy *phy = &dev->phy;

      if (channel == 0xFF) {
            switch (phy->type) {
            case B43legacy_PHYTYPE_B:
            case B43legacy_PHYTYPE_G:
                  channel = B43legacy_RADIO_DEFAULT_CHANNEL_BG;
                  break;
            default:
                  B43legacy_WARN_ON(1);
            }
      }

/* TODO: Check if channel is valid - return -EINVAL if not */
      if (synthetic_pu_workaround)
            b43legacy_synth_pu_workaround(dev, channel);

      b43legacy_write16(dev, B43legacy_MMIO_CHANNEL,
                    channel2freq_bg(channel));

      if (channel == 14) {
            if (dev->dev->bus->sprom.r1.country_code == 5)   /* JAPAN) */
                  b43legacy_shm_write32(dev, B43legacy_SHM_SHARED,
                                    B43legacy_UCODEFLAGS_OFFSET,
                                    b43legacy_shm_read32(dev,
                                    B43legacy_SHM_SHARED,
                                    B43legacy_UCODEFLAGS_OFFSET)
                                    & ~(1 << 7));
            else
                  b43legacy_shm_write32(dev, B43legacy_SHM_SHARED,
                                    B43legacy_UCODEFLAGS_OFFSET,
                                    b43legacy_shm_read32(dev,
                                    B43legacy_SHM_SHARED,
                                    B43legacy_UCODEFLAGS_OFFSET)
                                    | (1 << 7));
            b43legacy_write16(dev, B43legacy_MMIO_CHANNEL_EXT,
                          b43legacy_read16(dev,
                          B43legacy_MMIO_CHANNEL_EXT) | (1 << 11));
      } else
            b43legacy_write16(dev, B43legacy_MMIO_CHANNEL_EXT,
                          b43legacy_read16(dev,
                          B43legacy_MMIO_CHANNEL_EXT) & 0xF7BF);

      phy->channel = channel;
      /*XXX: Using the longer of 2 timeouts (8000 vs 2000 usecs). Specs states
       *     that 2000 usecs might suffice. */
      msleep(8);

      return 0;
}

void b43legacy_radio_set_txantenna(struct b43legacy_wldev *dev, u32 val)
{
      u16 tmp;

      val <<= 8;
      tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 0x0022) & 0xFCFF;
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0022, tmp | val);
      tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 0x03A8) & 0xFCFF;
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x03A8, tmp | val);
      tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 0x0054) & 0xFCFF;
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0054, tmp | val);
}

/* http://bcm-specs.sipsolutions.net/TX_Gain_Base_Band */
static u16 b43legacy_get_txgain_base_band(u16 txpower)
{
      u16 ret;

      B43legacy_WARN_ON(txpower > 63);

      if (txpower >= 54)
            ret = 2;
      else if (txpower >= 49)
            ret = 4;
      else if (txpower >= 44)
            ret = 5;
      else
            ret = 6;

      return ret;
}

/* http://bcm-specs.sipsolutions.net/TX_Gain_Radio_Frequency_Power_Amplifier */
static u16 b43legacy_get_txgain_freq_power_amp(u16 txpower)
{
      u16 ret;

      B43legacy_WARN_ON(txpower > 63);

      if (txpower >= 32)
            ret = 0;
      else if (txpower >= 25)
            ret = 1;
      else if (txpower >= 20)
            ret = 2;
      else if (txpower >= 12)
            ret = 3;
      else
            ret = 4;

      return ret;
}

/* http://bcm-specs.sipsolutions.net/TX_Gain_Digital_Analog_Converter */
static u16 b43legacy_get_txgain_dac(u16 txpower)
{
      u16 ret;

      B43legacy_WARN_ON(txpower > 63);

      if (txpower >= 54)
            ret = txpower - 53;
      else if (txpower >= 49)
            ret = txpower - 42;
      else if (txpower >= 44)
            ret = txpower - 37;
      else if (txpower >= 32)
            ret = txpower - 32;
      else if (txpower >= 25)
            ret = txpower - 20;
      else if (txpower >= 20)
            ret = txpower - 13;
      else if (txpower >= 12)
            ret = txpower - 8;
      else
            ret = txpower;

      return ret;
}

void b43legacy_radio_set_txpower_a(struct b43legacy_wldev *dev, u16 txpower)
{
      struct b43legacy_phy *phy = &dev->phy;
      u16 pamp;
      u16 base;
      u16 dac;
      u16 ilt;

      txpower = limit_value(txpower, 0, 63);

      pamp = b43legacy_get_txgain_freq_power_amp(txpower);
      pamp <<= 5;
      pamp &= 0x00E0;
      b43legacy_phy_write(dev, 0x0019, pamp);

      base = b43legacy_get_txgain_base_band(txpower);
      base &= 0x000F;
      b43legacy_phy_write(dev, 0x0017, base | 0x0020);

      ilt = b43legacy_ilt_read(dev, 0x3001);
      ilt &= 0x0007;

      dac = b43legacy_get_txgain_dac(txpower);
      dac <<= 3;
      dac |= ilt;

      b43legacy_ilt_write(dev, 0x3001, dac);

      phy->txpwr_offset = txpower;

      /* TODO: FuncPlaceholder (Adjust BB loft cancel) */
}

void b43legacy_radio_set_txpower_bg(struct b43legacy_wldev *dev,
                            u16 baseband_attenuation,
                            u16 radio_attenuation,
                            u16 txpower)
{
      struct b43legacy_phy *phy = &dev->phy;

      if (baseband_attenuation == 0xFFFF)
            baseband_attenuation = phy->bbatt;
      if (radio_attenuation == 0xFFFF)
            radio_attenuation = phy->rfatt;
      if (txpower == 0xFFFF)
            txpower = phy->txctl1;
      phy->bbatt = baseband_attenuation;
      phy->rfatt = radio_attenuation;
      phy->txctl1 = txpower;

      B43legacy_WARN_ON(baseband_attenuation > 11);
      if (phy->radio_rev < 6)
            B43legacy_WARN_ON(radio_attenuation > 9);
      else
            B43legacy_WARN_ON(radio_attenuation > 31);
      B43legacy_WARN_ON(txpower > 7);

      b43legacy_phy_set_baseband_attenuation(dev, baseband_attenuation);
      b43legacy_radio_write16(dev, 0x0043, radio_attenuation);
      b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0064,
                        radio_attenuation);
      if (phy->radio_ver == 0x2050)
            b43legacy_radio_write16(dev, 0x0052,
                              (b43legacy_radio_read16(dev, 0x0052)
                              & ~0x0070) | ((txpower << 4) & 0x0070));
      /* FIXME: The spec is very weird and unclear here. */
      if (phy->type == B43legacy_PHYTYPE_G)
            b43legacy_phy_lo_adjust(dev, 0);
}

u16 b43legacy_default_baseband_attenuation(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;

      if (phy->radio_ver == 0x2050 && phy->radio_rev < 6)
            return 0;
      return 2;
}

u16 b43legacy_default_radio_attenuation(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;
      u16 att = 0xFFFF;

      switch (phy->radio_ver) {
      case 0x2053:
            switch (phy->radio_rev) {
            case 1:
                  att = 6;
                  break;
            }
            break;
      case 0x2050:
            switch (phy->radio_rev) {
            case 0:
                  att = 5;
                  break;
            case 1:
                  if (phy->type == B43legacy_PHYTYPE_G) {
                        if (is_bcm_board_vendor(dev) &&
                            dev->dev->bus->boardinfo.type == 0x421 &&
                            dev->dev->bus->boardinfo.rev >= 30)
                              att = 3;
                        else if (is_bcm_board_vendor(dev) &&
                               dev->dev->bus->boardinfo.type == 0x416)
                              att = 3;
                        else
                              att = 1;
                  } else {
                        if (is_bcm_board_vendor(dev) &&
                            dev->dev->bus->boardinfo.type == 0x421 &&
                            dev->dev->bus->boardinfo.rev >= 30)
                              att = 7;
                        else
                              att = 6;
                  }
                  break;
            case 2:
                  if (phy->type == B43legacy_PHYTYPE_G) {
                        if (is_bcm_board_vendor(dev) &&
                            dev->dev->bus->boardinfo.type == 0x421 &&
                            dev->dev->bus->boardinfo.rev >= 30)
                              att = 3;
                        else if (is_bcm_board_vendor(dev) &&
                               dev->dev->bus->boardinfo.type ==
                               0x416)
                              att = 5;
                        else if (dev->dev->bus->chip_id == 0x4320)
                              att = 4;
                        else
                              att = 3;
                  } else
                        att = 6;
                  break;
            case 3:
                  att = 5;
                  break;
            case 4:
            case 5:
                  att = 1;
                  break;
            case 6:
            case 7:
                  att = 5;
                  break;
            case 8:
                  att = 0x1A;
                  break;
            case 9:
            default:
                  att = 5;
            }
      }
      if (is_bcm_board_vendor(dev) &&
          dev->dev->bus->boardinfo.type == 0x421) {
            if (dev->dev->bus->boardinfo.rev < 0x43)
                  att = 2;
            else if (dev->dev->bus->boardinfo.rev < 0x51)
                  att = 3;
      }
      if (att == 0xFFFF)
            att = 5;

      return att;
}

u16 b43legacy_default_txctl1(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;

      if (phy->radio_ver != 0x2050)
            return 0;
      if (phy->radio_rev == 1)
            return 3;
      if (phy->radio_rev < 6)
            return 2;
      if (phy->radio_rev == 8)
            return 1;
      return 0;
}

void b43legacy_radio_turn_on(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;
      int err;
      u8 channel;

      might_sleep();

      if (phy->radio_on)
            return;

      switch (phy->type) {
      case B43legacy_PHYTYPE_B:
      case B43legacy_PHYTYPE_G:
            b43legacy_phy_write(dev, 0x0015, 0x8000);
            b43legacy_phy_write(dev, 0x0015, 0xCC00);
            b43legacy_phy_write(dev, 0x0015,
                            (phy->gmode ? 0x00C0 : 0x0000));
            if (phy->radio_off_context.valid) {
                  /* Restore the RFover values. */
                  b43legacy_phy_write(dev, B43legacy_PHY_RFOVER,
                                  phy->radio_off_context.rfover);
                  b43legacy_phy_write(dev, B43legacy_PHY_RFOVERVAL,
                                  phy->radio_off_context.rfoverval);
                  phy->radio_off_context.valid = 0;
            }
            channel = phy->channel;
            err = b43legacy_radio_selectchannel(dev,
                              B43legacy_RADIO_DEFAULT_CHANNEL_BG, 1);
            err |= b43legacy_radio_selectchannel(dev, channel, 0);
            B43legacy_WARN_ON(err);
            break;
      default:
            B43legacy_BUG_ON(1);
      }
      phy->radio_on = 1;
      b43legacy_leds_update(dev, 0);
}

void b43legacy_radio_turn_off(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;

      if (phy->type == B43legacy_PHYTYPE_G && dev->dev->id.revision >= 5) {
            u16 rfover, rfoverval;

            rfover = b43legacy_phy_read(dev, B43legacy_PHY_RFOVER);
            rfoverval = b43legacy_phy_read(dev, B43legacy_PHY_RFOVERVAL);
            phy->radio_off_context.rfover = rfover;
            phy->radio_off_context.rfoverval = rfoverval;
            phy->radio_off_context.valid = 1;
            b43legacy_phy_write(dev, B43legacy_PHY_RFOVER, rfover | 0x008C);
            b43legacy_phy_write(dev, B43legacy_PHY_RFOVERVAL,
                            rfoverval & 0xFF73);
      } else
            b43legacy_phy_write(dev, 0x0015, 0xAA00);
      phy->radio_on = 0;
      b43legacydbg(dev->wl, "Radio initialized\n");
      b43legacy_leds_update(dev, 0);
}

void b43legacy_radio_clear_tssi(struct b43legacy_wldev *dev)
{
      struct b43legacy_phy *phy = &dev->phy;

      switch (phy->type) {
      case B43legacy_PHYTYPE_B:
      case B43legacy_PHYTYPE_G:
            b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0058,
                              0x7F7F);
            b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x005a,
                              0x7F7F);
            b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0070,
                              0x7F7F);
            b43legacy_shm_write16(dev, B43legacy_SHM_SHARED, 0x0072,
                              0x7F7F);
            break;
      }
}

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