/*

  Broadcom B43legacy wireless driver

  Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
                     Stefano Brivio <stefano.brivio@polimi.it>
                     Michael Buesch <m@bues.ch>
                     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 <linux/pci.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/types.h>

#include "b43legacy.h"
#include "phy.h"
#include "main.h"
#include "radio.h"
#include "ilt.h"


static const s8 b43legacy_tssi2dbm_b_table[] = {
        0x4D, 0x4C, 0x4B, 0x4A,
        0x4A, 0x49, 0x48, 0x47,
        0x47, 0x46, 0x45, 0x45,
        0x44, 0x43, 0x42, 0x42,
        0x41, 0x40, 0x3F, 0x3E,
        0x3D, 0x3C, 0x3B, 0x3A,
        0x39, 0x38, 0x37, 0x36,
        0x35, 0x34, 0x32, 0x31,
        0x30, 0x2F, 0x2D, 0x2C,
        0x2B, 0x29, 0x28, 0x26,
        0x25, 0x23, 0x21, 0x1F,
        0x1D, 0x1A, 0x17, 0x14,
        0x10, 0x0C, 0x06, 0x00,
          -7,   -7,   -7,   -7,
          -7,   -7,   -7,   -7,
          -7,   -7,   -7,   -7,
};

static const s8 b43legacy_tssi2dbm_g_table[] = {
         77,  77,  77,  76,
         76,  76,  75,  75,
         74,  74,  73,  73,
         73,  72,  72,  71,
         71,  70,  70,  69,
         68,  68,  67,  67,
         66,  65,  65,  64,
         63,  63,  62,  61,
         60,  59,  58,  57,
         56,  55,  54,  53,
         52,  50,  49,  47,
         45,  43,  40,  37,
         33,  28,  22,  14,
          5,  -7, -20, -20,
        -20, -20, -20, -20,
        -20, -20, -20, -20,
};

static void b43legacy_phy_initg(struct b43legacy_wldev *dev);


static inline
void b43legacy_voluntary_preempt(void)
{
        B43legacy_BUG_ON(!(!in_atomic() && !in_irq() &&
                          !in_interrupt() && !irqs_disabled()));
#ifndef CONFIG_PREEMPT
        cond_resched();
#endif /* CONFIG_PREEMPT */
}

/* Lock the PHY registers against concurrent access from the microcode.
 * This lock is nonrecursive. */
void b43legacy_phy_lock(struct b43legacy_wldev *dev)
{
#if B43legacy_DEBUG
        B43legacy_WARN_ON(dev->phy.phy_locked);
        dev->phy.phy_locked = 1;
#endif

        if (dev->dev->id.revision < 3) {
                b43legacy_mac_suspend(dev);
        } else {
                if (!b43legacy_is_mode(dev->wl, NL80211_IFTYPE_AP))
                        b43legacy_power_saving_ctl_bits(dev, -1, 1);
        }
}

void b43legacy_phy_unlock(struct b43legacy_wldev *dev)
{
#if B43legacy_DEBUG
        B43legacy_WARN_ON(!dev->phy.phy_locked);
        dev->phy.phy_locked = 0;
#endif

        if (dev->dev->id.revision < 3) {
                b43legacy_mac_enable(dev);
        } else {
                if (!b43legacy_is_mode(dev->wl, NL80211_IFTYPE_AP))
                        b43legacy_power_saving_ctl_bits(dev, -1, -1);
        }
}

u16 b43legacy_phy_read(struct b43legacy_wldev *dev, u16 offset)
{
        b43legacy_write16(dev, B43legacy_MMIO_PHY_CONTROL, offset);
        return b43legacy_read16(dev, B43legacy_MMIO_PHY_DATA);
}

void b43legacy_phy_write(struct b43legacy_wldev *dev, u16 offset, u16 val)
{
        b43legacy_write16(dev, B43legacy_MMIO_PHY_CONTROL, offset);
        mmiowb();
        b43legacy_write16(dev, B43legacy_MMIO_PHY_DATA, val);
}

void b43legacy_phy_calibrate(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;

        b43legacy_read32(dev, B43legacy_MMIO_MACCTL); /* Dummy read. */
        if (phy->calibrated)
                return;
        if (phy->type == B43legacy_PHYTYPE_G && phy->rev == 1) {
                b43legacy_wireless_core_reset(dev, 0);
                b43legacy_phy_initg(dev);
                b43legacy_wireless_core_reset(dev, B43legacy_TMSLOW_GMODE);
        }
        phy->calibrated = 1;
}

/* initialize B PHY power control
 * as described in http://bcm-specs.sipsolutions.net/InitPowerControl
 */
static void b43legacy_phy_init_pctl(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;
        u16 saved_batt = 0;
        u16 saved_ratt = 0;
        u16 saved_txctl1 = 0;
        int must_reset_txpower = 0;

        B43legacy_BUG_ON(!(phy->type == B43legacy_PHYTYPE_B ||
                          phy->type == B43legacy_PHYTYPE_G));
        if (is_bcm_board_vendor(dev) &&
            (dev->dev->bus->boardinfo.type == 0x0416))
                return;

        b43legacy_phy_write(dev, 0x0028, 0x8018);
        b43legacy_write16(dev, 0x03E6, b43legacy_read16(dev, 0x03E6) & 0xFFDF);

        if (phy->type == B43legacy_PHYTYPE_G) {
                if (!phy->gmode)
                        return;
                b43legacy_phy_write(dev, 0x047A, 0xC111);
        }
        if (phy->savedpctlreg != 0xFFFF)
                return;
#ifdef CONFIG_B43LEGACY_DEBUG
        if (phy->manual_txpower_control)
                return;
#endif

        if (phy->type == B43legacy_PHYTYPE_B &&
            phy->rev >= 2 &&
            phy->radio_ver == 0x2050)
                b43legacy_radio_write16(dev, 0x0076,
                                        b43legacy_radio_read16(dev, 0x0076)
                                        | 0x0084);
        else {
                saved_batt = phy->bbatt;
                saved_ratt = phy->rfatt;
                saved_txctl1 = phy->txctl1;
                if ((phy->radio_rev >= 6) && (phy->radio_rev <= 8)
                    && /*FIXME: incomplete specs for 5 < revision < 9 */ 0)
                        b43legacy_radio_set_txpower_bg(dev, 0xB, 0x1F, 0);
                else
                        b43legacy_radio_set_txpower_bg(dev, 0xB, 9, 0);
                must_reset_txpower = 1;
        }
        b43legacy_dummy_transmission(dev);

        phy->savedpctlreg = b43legacy_phy_read(dev, B43legacy_PHY_G_PCTL);

        if (must_reset_txpower)
                b43legacy_radio_set_txpower_bg(dev, saved_batt, saved_ratt,
                                               saved_txctl1);
        else
                b43legacy_radio_write16(dev, 0x0076, b43legacy_radio_read16(dev,
                                        0x0076) & 0xFF7B);
        b43legacy_radio_clear_tssi(dev);
}

static void b43legacy_phy_agcsetup(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;
        u16 offset = 0x0000;

        if (phy->rev == 1)
                offset = 0x4C00;

        b43legacy_ilt_write(dev, offset, 0x00FE);
        b43legacy_ilt_write(dev, offset + 1, 0x000D);
        b43legacy_ilt_write(dev, offset + 2, 0x0013);
        b43legacy_ilt_write(dev, offset + 3, 0x0019);

        if (phy->rev == 1) {
                b43legacy_ilt_write(dev, 0x1800, 0x2710);
                b43legacy_ilt_write(dev, 0x1801, 0x9B83);
                b43legacy_ilt_write(dev, 0x1802, 0x9B83);
                b43legacy_ilt_write(dev, 0x1803, 0x0F8D);
                b43legacy_phy_write(dev, 0x0455, 0x0004);
        }

        b43legacy_phy_write(dev, 0x04A5, (b43legacy_phy_read(dev, 0x04A5)
                                          & 0x00FF) | 0x5700);
        b43legacy_phy_write(dev, 0x041A, (b43legacy_phy_read(dev, 0x041A)
                                          & 0xFF80) | 0x000F);
        b43legacy_phy_write(dev, 0x041A, (b43legacy_phy_read(dev, 0x041A)
                                          & 0xC07F) | 0x2B80);
        b43legacy_phy_write(dev, 0x048C, (b43legacy_phy_read(dev, 0x048C)
                                          & 0xF0FF) | 0x0300);

        b43legacy_radio_write16(dev, 0x007A,
                                b43legacy_radio_read16(dev, 0x007A)
                                | 0x0008);

        b43legacy_phy_write(dev, 0x04A0, (b43legacy_phy_read(dev, 0x04A0)
                            & 0xFFF0) | 0x0008);
        b43legacy_phy_write(dev, 0x04A1, (b43legacy_phy_read(dev, 0x04A1)
                            & 0xF0FF) | 0x0600);
        b43legacy_phy_write(dev, 0x04A2, (b43legacy_phy_read(dev, 0x04A2)
                            & 0xF0FF) | 0x0700);
        b43legacy_phy_write(dev, 0x04A0, (b43legacy_phy_read(dev, 0x04A0)
                            & 0xF0FF) | 0x0100);

        if (phy->rev == 1)
                b43legacy_phy_write(dev, 0x04A2,
                                    (b43legacy_phy_read(dev, 0x04A2)
                                    & 0xFFF0) | 0x0007);

        b43legacy_phy_write(dev, 0x0488, (b43legacy_phy_read(dev, 0x0488)
                            & 0xFF00) | 0x001C);
        b43legacy_phy_write(dev, 0x0488, (b43legacy_phy_read(dev, 0x0488)
                            & 0xC0FF) | 0x0200);
        b43legacy_phy_write(dev, 0x0496, (b43legacy_phy_read(dev, 0x0496)
                            & 0xFF00) | 0x001C);
        b43legacy_phy_write(dev, 0x0489, (b43legacy_phy_read(dev, 0x0489)
                            & 0xFF00) | 0x0020);
        b43legacy_phy_write(dev, 0x0489, (b43legacy_phy_read(dev, 0x0489)
                            & 0xC0FF) | 0x0200);
        b43legacy_phy_write(dev, 0x0482, (b43legacy_phy_read(dev, 0x0482)
                            & 0xFF00) | 0x002E);
        b43legacy_phy_write(dev, 0x0496, (b43legacy_phy_read(dev, 0x0496)
                            & 0x00FF) | 0x1A00);
        b43legacy_phy_write(dev, 0x0481, (b43legacy_phy_read(dev, 0x0481)
                            & 0xFF00) | 0x0028);
        b43legacy_phy_write(dev, 0x0481, (b43legacy_phy_read(dev, 0x0481)
                            & 0x00FF) | 0x2C00);

        if (phy->rev == 1) {
                b43legacy_phy_write(dev, 0x0430, 0x092B);
                b43legacy_phy_write(dev, 0x041B,
                                    (b43legacy_phy_read(dev, 0x041B)
                                    & 0xFFE1) | 0x0002);
        } else {
                b43legacy_phy_write(dev, 0x041B,
                                    b43legacy_phy_read(dev, 0x041B) & 0xFFE1);
                b43legacy_phy_write(dev, 0x041F, 0x287A);
                b43legacy_phy_write(dev, 0x0420,
                                    (b43legacy_phy_read(dev, 0x0420)
                                    & 0xFFF0) | 0x0004);
        }

        if (phy->rev > 2) {
                b43legacy_phy_write(dev, 0x0422, 0x287A);
                b43legacy_phy_write(dev, 0x0420,
                                    (b43legacy_phy_read(dev, 0x0420)
                                    & 0x0FFF) | 0x3000);
        }

        b43legacy_phy_write(dev, 0x04A8, (b43legacy_phy_read(dev, 0x04A8)
                            & 0x8080) | 0x7874);
        b43legacy_phy_write(dev, 0x048E, 0x1C00);

        if (phy->rev == 1) {
                b43legacy_phy_write(dev, 0x04AB,
                                    (b43legacy_phy_read(dev, 0x04AB)
                                    & 0xF0FF) | 0x0600);
                b43legacy_phy_write(dev, 0x048B, 0x005E);
                b43legacy_phy_write(dev, 0x048C,
                                    (b43legacy_phy_read(dev, 0x048C) & 0xFF00)
                                    | 0x001E);
                b43legacy_phy_write(dev, 0x048D, 0x0002);
        }

        b43legacy_ilt_write(dev, offset + 0x0800, 0);
        b43legacy_ilt_write(dev, offset + 0x0801, 7);
        b43legacy_ilt_write(dev, offset + 0x0802, 16);
        b43legacy_ilt_write(dev, offset + 0x0803, 28);

        if (phy->rev >= 6) {
                b43legacy_phy_write(dev, 0x0426,
                                    (b43legacy_phy_read(dev, 0x0426) & 0xFFFC));
                b43legacy_phy_write(dev, 0x0426,
                                    (b43legacy_phy_read(dev, 0x0426) & 0xEFFF));
        }
}

static void b43legacy_phy_setupg(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;
        u16 i;

        B43legacy_BUG_ON(phy->type != B43legacy_PHYTYPE_G);
        if (phy->rev == 1) {
                b43legacy_phy_write(dev, 0x0406, 0x4F19);
                b43legacy_phy_write(dev, B43legacy_PHY_G_CRS,
                                    (b43legacy_phy_read(dev,
                                    B43legacy_PHY_G_CRS) & 0xFC3F) | 0x0340);
                b43legacy_phy_write(dev, 0x042C, 0x005A);
                b43legacy_phy_write(dev, 0x0427, 0x001A);

                for (i = 0; i < B43legacy_ILT_FINEFREQG_SIZE; i++)
                        b43legacy_ilt_write(dev, 0x5800 + i,
                                            b43legacy_ilt_finefreqg[i]);
                for (i = 0; i < B43legacy_ILT_NOISEG1_SIZE; i++)
                        b43legacy_ilt_write(dev, 0x1800 + i,
                                            b43legacy_ilt_noiseg1[i]);
                for (i = 0; i < B43legacy_ILT_ROTOR_SIZE; i++)
                        b43legacy_ilt_write32(dev, 0x2000 + i,
                                              b43legacy_ilt_rotor[i]);
        } else {
                /* nrssi values are signed 6-bit values. Why 0x7654 here? */
                b43legacy_nrssi_hw_write(dev, 0xBA98, (s16)0x7654);

                if (phy->rev == 2) {
                        b43legacy_phy_write(dev, 0x04C0, 0x1861);
                        b43legacy_phy_write(dev, 0x04C1, 0x0271);
                } else if (phy->rev > 2) {
                        b43legacy_phy_write(dev, 0x04C0, 0x0098);
                        b43legacy_phy_write(dev, 0x04C1, 0x0070);
                        b43legacy_phy_write(dev, 0x04C9, 0x0080);
                }
                b43legacy_phy_write(dev, 0x042B, b43legacy_phy_read(dev,
                                    0x042B) | 0x800);

                for (i = 0; i < 64; i++)
                        b43legacy_ilt_write(dev, 0x4000 + i, i);
                for (i = 0; i < B43legacy_ILT_NOISEG2_SIZE; i++)
                        b43legacy_ilt_write(dev, 0x1800 + i,
                                            b43legacy_ilt_noiseg2[i]);
        }

        if (phy->rev <= 2)
                for (i = 0; i < B43legacy_ILT_NOISESCALEG_SIZE; i++)
                        b43legacy_ilt_write(dev, 0x1400 + i,
                                            b43legacy_ilt_noisescaleg1[i]);
        else if ((phy->rev >= 7) && (b43legacy_phy_read(dev, 0x0449) & 0x0200))
                for (i = 0; i < B43legacy_ILT_NOISESCALEG_SIZE; i++)
                        b43legacy_ilt_write(dev, 0x1400 + i,
                                            b43legacy_ilt_noisescaleg3[i]);
        else
                for (i = 0; i < B43legacy_ILT_NOISESCALEG_SIZE; i++)
                        b43legacy_ilt_write(dev, 0x1400 + i,
                                            b43legacy_ilt_noisescaleg2[i]);

        if (phy->rev == 2)
                for (i = 0; i < B43legacy_ILT_SIGMASQR_SIZE; i++)
                        b43legacy_ilt_write(dev, 0x5000 + i,
                                            b43legacy_ilt_sigmasqr1[i]);
        else if ((phy->rev > 2) && (phy->rev <= 8))
                for (i = 0; i < B43legacy_ILT_SIGMASQR_SIZE; i++)
                        b43legacy_ilt_write(dev, 0x5000 + i,
                                            b43legacy_ilt_sigmasqr2[i]);

        if (phy->rev == 1) {
                for (i = 0; i < B43legacy_ILT_RETARD_SIZE; i++)
                        b43legacy_ilt_write32(dev, 0x2400 + i,
                                              b43legacy_ilt_retard[i]);
                for (i = 4; i < 20; i++)
                        b43legacy_ilt_write(dev, 0x5400 + i, 0x0020);
                b43legacy_phy_agcsetup(dev);

                if (is_bcm_board_vendor(dev) &&
                    (dev->dev->bus->boardinfo.type == 0x0416) &&
                    (dev->dev->bus->sprom.board_rev == 0x0017))
                        return;

                b43legacy_ilt_write(dev, 0x5001, 0x0002);
                b43legacy_ilt_write(dev, 0x5002, 0x0001);
        } else {
                for (i = 0; i <= 0x20; i++)
                        b43legacy_ilt_write(dev, 0x1000 + i, 0x0820);
                b43legacy_phy_agcsetup(dev);
                b43legacy_phy_read(dev, 0x0400); /* dummy read */
                b43legacy_phy_write(dev, 0x0403, 0x1000);
                b43legacy_ilt_write(dev, 0x3C02, 0x000F);
                b43legacy_ilt_write(dev, 0x3C03, 0x0014);

                if (is_bcm_board_vendor(dev) &&
                    (dev->dev->bus->boardinfo.type == 0x0416) &&
                    (dev->dev->bus->sprom.board_rev == 0x0017))
                        return;

                b43legacy_ilt_write(dev, 0x0401, 0x0002);
                b43legacy_ilt_write(dev, 0x0402, 0x0001);
        }
}

/* Initialize the APHY portion of a GPHY. */
static void b43legacy_phy_inita(struct b43legacy_wldev *dev)
{

        might_sleep();

        b43legacy_phy_setupg(dev);
        if (dev->dev->bus->sprom.boardflags_lo & B43legacy_BFL_PACTRL)
                b43legacy_phy_write(dev, 0x046E, 0x03CF);
}

static void b43legacy_phy_initb2(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;
        u16 offset;
        int val;

        b43legacy_write16(dev, 0x03EC, 0x3F22);
        b43legacy_phy_write(dev, 0x0020, 0x301C);
        b43legacy_phy_write(dev, 0x0026, 0x0000);
        b43legacy_phy_write(dev, 0x0030, 0x00C6);
        b43legacy_phy_write(dev, 0x0088, 0x3E00);
        val = 0x3C3D;
        for (offset = 0x0089; offset < 0x00A7; offset++) {
                b43legacy_phy_write(dev, offset, val);
                val -= 0x0202;
        }
        b43legacy_phy_write(dev, 0x03E4, 0x3000);
        b43legacy_radio_selectchannel(dev, phy->channel, 0);
        if (phy->radio_ver != 0x2050) {
                b43legacy_radio_write16(dev, 0x0075, 0x0080);
                b43legacy_radio_write16(dev, 0x0079, 0x0081);
        }
        b43legacy_radio_write16(dev, 0x0050, 0x0020);
        b43legacy_radio_write16(dev, 0x0050, 0x0023);
        if (phy->radio_ver == 0x2050) {
                b43legacy_radio_write16(dev, 0x0050, 0x0020);
                b43legacy_radio_write16(dev, 0x005A, 0x0070);
                b43legacy_radio_write16(dev, 0x005B, 0x007B);
                b43legacy_radio_write16(dev, 0x005C, 0x00B0);
                b43legacy_radio_write16(dev, 0x007A, 0x000F);
                b43legacy_phy_write(dev, 0x0038, 0x0677);
                b43legacy_radio_init2050(dev);
        }
        b43legacy_phy_write(dev, 0x0014, 0x0080);
        b43legacy_phy_write(dev, 0x0032, 0x00CA);
        b43legacy_phy_write(dev, 0x0032, 0x00CC);
        b43legacy_phy_write(dev, 0x0035, 0x07C2);
        b43legacy_phy_lo_b_measure(dev);
        b43legacy_phy_write(dev, 0x0026, 0xCC00);
        if (phy->radio_ver != 0x2050)
                b43legacy_phy_write(dev, 0x0026, 0xCE00);
        b43legacy_write16(dev, B43legacy_MMIO_CHANNEL_EXT, 0x1000);
        b43legacy_phy_write(dev, 0x002A, 0x88A3);
        if (phy->radio_ver != 0x2050)
                b43legacy_phy_write(dev, 0x002A, 0x88C2);
        b43legacy_radio_set_txpower_bg(dev, 0xFFFF, 0xFFFF, 0xFFFF);
        b43legacy_phy_init_pctl(dev);
}

static void b43legacy_phy_initb4(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;
        u16 offset;
        u16 val;

        b43legacy_write16(dev, 0x03EC, 0x3F22);
        b43legacy_phy_write(dev, 0x0020, 0x301C);
        b43legacy_phy_write(dev, 0x0026, 0x0000);
        b43legacy_phy_write(dev, 0x0030, 0x00C6);
        b43legacy_phy_write(dev, 0x0088, 0x3E00);
        val = 0x3C3D;
        for (offset = 0x0089; offset < 0x00A7; offset++) {
                b43legacy_phy_write(dev, offset, val);
                val -= 0x0202;
        }
        b43legacy_phy_write(dev, 0x03E4, 0x3000);
        b43legacy_radio_selectchannel(dev, phy->channel, 0);
        if (phy->radio_ver != 0x2050) {
                b43legacy_radio_write16(dev, 0x0075, 0x0080);
                b43legacy_radio_write16(dev, 0x0079, 0x0081);
        }
        b43legacy_radio_write16(dev, 0x0050, 0x0020);
        b43legacy_radio_write16(dev, 0x0050, 0x0023);
        if (phy->radio_ver == 0x2050) {
                b43legacy_radio_write16(dev, 0x0050, 0x0020);
                b43legacy_radio_write16(dev, 0x005A, 0x0070);
                b43legacy_radio_write16(dev, 0x005B, 0x007B);
                b43legacy_radio_write16(dev, 0x005C, 0x00B0);
                b43legacy_radio_write16(dev, 0x007A, 0x000F);
                b43legacy_phy_write(dev, 0x0038, 0x0677);
                b43legacy_radio_init2050(dev);
        }
        b43legacy_phy_write(dev, 0x0014, 0x0080);
        b43legacy_phy_write(dev, 0x0032, 0x00CA);
        if (phy->radio_ver == 0x2050)
                b43legacy_phy_write(dev, 0x0032, 0x00E0);
        b43legacy_phy_write(dev, 0x0035, 0x07C2);

        b43legacy_phy_lo_b_measure(dev);

        b43legacy_phy_write(dev, 0x0026, 0xCC00);
        if (phy->radio_ver == 0x2050)
                b43legacy_phy_write(dev, 0x0026, 0xCE00);
        b43legacy_write16(dev, B43legacy_MMIO_CHANNEL_EXT, 0x1100);
        b43legacy_phy_write(dev, 0x002A, 0x88A3);
        if (phy->radio_ver == 0x2050)
                b43legacy_phy_write(dev, 0x002A, 0x88C2);
        b43legacy_radio_set_txpower_bg(dev, 0xFFFF, 0xFFFF, 0xFFFF);
        if (dev->dev->bus->sprom.boardflags_lo & B43legacy_BFL_RSSI) {
                b43legacy_calc_nrssi_slope(dev);
                b43legacy_calc_nrssi_threshold(dev);
        }
        b43legacy_phy_init_pctl(dev);
}

static void b43legacy_phy_initb5(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;
        u16 offset;
        u16 value;
        u8 old_channel;

        if (phy->analog == 1)
                b43legacy_radio_write16(dev, 0x007A,
                                        b43legacy_radio_read16(dev, 0x007A)
                                        | 0x0050);
        if (!is_bcm_board_vendor(dev) &&
            (dev->dev->bus->boardinfo.type != 0x0416)) {
                value = 0x2120;
                for (offset = 0x00A8 ; offset < 0x00C7; offset++) {
                        b43legacy_phy_write(dev, offset, value);
                        value += 0x0202;
                }
        }
        b43legacy_phy_write(dev, 0x0035,
                            (b43legacy_phy_read(dev, 0x0035) & 0xF0FF)
                            | 0x0700);
        if (phy->radio_ver == 0x2050)
                b43legacy_phy_write(dev, 0x0038, 0x0667);

        if (phy->gmode) {
                if (phy->radio_ver == 0x2050) {
                        b43legacy_radio_write16(dev, 0x007A,
                                        b43legacy_radio_read16(dev, 0x007A)
                                        | 0x0020);
                        b43legacy_radio_write16(dev, 0x0051,
                                        b43legacy_radio_read16(dev, 0x0051)
                                        | 0x0004);
                }
                b43legacy_write16(dev, B43legacy_MMIO_PHY_RADIO, 0x0000);

                b43legacy_phy_write(dev, 0x0802, b43legacy_phy_read(dev, 0x0802)
                                    | 0x0100);
                b43legacy_phy_write(dev, 0x042B, b43legacy_phy_read(dev, 0x042B)
                                    | 0x2000);

                b43legacy_phy_write(dev, 0x001C, 0x186A);

                b43legacy_phy_write(dev, 0x0013, (b43legacy_phy_read(dev,
                                    0x0013) & 0x00FF) | 0x1900);
                b43legacy_phy_write(dev, 0x0035, (b43legacy_phy_read(dev,
                                    0x0035) & 0xFFC0) | 0x0064);
                b43legacy_phy_write(dev, 0x005D, (b43legacy_phy_read(dev,
                                    0x005D) & 0xFF80) | 0x000A);
                b43legacy_phy_write(dev, 0x5B, 0x0000);
                b43legacy_phy_write(dev, 0x5C, 0x0000);
        }

        if (dev->bad_frames_preempt)
                b43legacy_phy_write(dev, B43legacy_PHY_RADIO_BITFIELD,
                                    b43legacy_phy_read(dev,
                                    B43legacy_PHY_RADIO_BITFIELD) | (1 << 12));

        if (phy->analog == 1) {
                b43legacy_phy_write(dev, 0x0026, 0xCE00);
                b43legacy_phy_write(dev, 0x0021, 0x3763);
                b43legacy_phy_write(dev, 0x0022, 0x1BC3);
                b43legacy_phy_write(dev, 0x0023, 0x06F9);
                b43legacy_phy_write(dev, 0x0024, 0x037E);
        } else
                b43legacy_phy_write(dev, 0x0026, 0xCC00);
        b43legacy_phy_write(dev, 0x0030, 0x00C6);
        b43legacy_write16(dev, 0x03EC, 0x3F22);

        if (phy->analog == 1)
                b43legacy_phy_write(dev, 0x0020, 0x3E1C);
        else
                b43legacy_phy_write(dev, 0x0020, 0x301C);

        if (phy->analog == 0)
                b43legacy_write16(dev, 0x03E4, 0x3000);

        old_channel = (phy->channel == 0xFF) ? 1 : phy->channel;
        /* Force to channel 7, even if not supported. */
        b43legacy_radio_selectchannel(dev, 7, 0);

        if (phy->radio_ver != 0x2050) {
                b43legacy_radio_write16(dev, 0x0075, 0x0080);
                b43legacy_radio_write16(dev, 0x0079, 0x0081);
        }

        b43legacy_radio_write16(dev, 0x0050, 0x0020);
        b43legacy_radio_write16(dev, 0x0050, 0x0023);

        if (phy->radio_ver == 0x2050) {
                b43legacy_radio_write16(dev, 0x0050, 0x0020);
                b43legacy_radio_write16(dev, 0x005A, 0x0070);
        }

        b43legacy_radio_write16(dev, 0x005B, 0x007B);
        b43legacy_radio_write16(dev, 0x005C, 0x00B0);

        b43legacy_radio_write16(dev, 0x007A, b43legacy_radio_read16(dev,
                                0x007A) | 0x0007);

        b43legacy_radio_selectchannel(dev, old_channel, 0);

        b43legacy_phy_write(dev, 0x0014, 0x0080);
        b43legacy_phy_write(dev, 0x0032, 0x00CA);
        b43legacy_phy_write(dev, 0x002A, 0x88A3);

        b43legacy_radio_set_txpower_bg(dev, 0xFFFF, 0xFFFF, 0xFFFF);

        if (phy->radio_ver == 0x2050)
                b43legacy_radio_write16(dev, 0x005D, 0x000D);

        b43legacy_write16(dev, 0x03E4, (b43legacy_read16(dev, 0x03E4) &
                          0xFFC0) | 0x0004);
}

static void b43legacy_phy_initb6(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;
        u16 offset;
        u16 val;
        u8 old_channel;

        b43legacy_phy_write(dev, 0x003E, 0x817A);
        b43legacy_radio_write16(dev, 0x007A,
                                (b43legacy_radio_read16(dev, 0x007A) | 0x0058));
        if (phy->radio_rev == 4 ||
             phy->radio_rev == 5) {
                b43legacy_radio_write16(dev, 0x0051, 0x0037);
                b43legacy_radio_write16(dev, 0x0052, 0x0070);
                b43legacy_radio_write16(dev, 0x0053, 0x00B3);
                b43legacy_radio_write16(dev, 0x0054, 0x009B);
                b43legacy_radio_write16(dev, 0x005A, 0x0088);
                b43legacy_radio_write16(dev, 0x005B, 0x0088);
                b43legacy_radio_write16(dev, 0x005D, 0x0088);
                b43legacy_radio_write16(dev, 0x005E, 0x0088);
                b43legacy_radio_write16(dev, 0x007D, 0x0088);
                b43legacy_shm_write32(dev, B43legacy_SHM_SHARED,
                                      B43legacy_UCODEFLAGS_OFFSET,
                                      (b43legacy_shm_read32(dev,
                                      B43legacy_SHM_SHARED,
                                      B43legacy_UCODEFLAGS_OFFSET)
                                      | 0x00000200));
        }
        if (phy->radio_rev == 8) {
                b43legacy_radio_write16(dev, 0x0051, 0x0000);
                b43legacy_radio_write16(dev, 0x0052, 0x0040);
                b43legacy_radio_write16(dev, 0x0053, 0x00B7);
                b43legacy_radio_write16(dev, 0x0054, 0x0098);
                b43legacy_radio_write16(dev, 0x005A, 0x0088);
                b43legacy_radio_write16(dev, 0x005B, 0x006B);
                b43legacy_radio_write16(dev, 0x005C, 0x000F);
                if (dev->dev->bus->sprom.boardflags_lo & 0x8000) {
                        b43legacy_radio_write16(dev, 0x005D, 0x00FA);
                        b43legacy_radio_write16(dev, 0x005E, 0x00D8);
                } else {
                        b43legacy_radio_write16(dev, 0x005D, 0x00F5);
                        b43legacy_radio_write16(dev, 0x005E, 0x00B8);
                }
                b43legacy_radio_write16(dev, 0x0073, 0x0003);
                b43legacy_radio_write16(dev, 0x007D, 0x00A8);
                b43legacy_radio_write16(dev, 0x007C, 0x0001);
                b43legacy_radio_write16(dev, 0x007E, 0x0008);
        }
        val = 0x1E1F;
        for (offset = 0x0088; offset < 0x0098; offset++) {
                b43legacy_phy_write(dev, offset, val);
                val -= 0x0202;
        }
        val = 0x3E3F;
        for (offset = 0x0098; offset < 0x00A8; offset++) {
                b43legacy_phy_write(dev, offset, val);
                val -= 0x0202;
        }
        val = 0x2120;
        for (offset = 0x00A8; offset < 0x00C8; offset++) {
                b43legacy_phy_write(dev, offset, (val & 0x3F3F));
                val += 0x0202;
        }
        if (phy->type == B43legacy_PHYTYPE_G) {
                b43legacy_radio_write16(dev, 0x007A,
                                        b43legacy_radio_read16(dev, 0x007A) |
                                        0x0020);
                b43legacy_radio_write16(dev, 0x0051,
                                        b43legacy_radio_read16(dev, 0x0051) |
                                        0x0004);
                b43legacy_phy_write(dev, 0x0802,
                                    b43legacy_phy_read(dev, 0x0802) | 0x0100);
                b43legacy_phy_write(dev, 0x042B,
                                    b43legacy_phy_read(dev, 0x042B) | 0x2000);
                b43legacy_phy_write(dev, 0x5B, 0x0000);
                b43legacy_phy_write(dev, 0x5C, 0x0000);
        }

        old_channel = phy->channel;
        if (old_channel >= 8)
                b43legacy_radio_selectchannel(dev, 1, 0);
        else
                b43legacy_radio_selectchannel(dev, 13, 0);

        b43legacy_radio_write16(dev, 0x0050, 0x0020);
        b43legacy_radio_write16(dev, 0x0050, 0x0023);
        udelay(40);
        if (phy->radio_rev < 6 || phy->radio_rev == 8) {
                b43legacy_radio_write16(dev, 0x007C,
                                        (b43legacy_radio_read16(dev, 0x007C)
                                        | 0x0002));
                b43legacy_radio_write16(dev, 0x0050, 0x0020);
        }
        if (phy->radio_rev <= 2) {
                b43legacy_radio_write16(dev, 0x0050, 0x0020);
                b43legacy_radio_write16(dev, 0x005A, 0x0070);
                b43legacy_radio_write16(dev, 0x005B, 0x007B);
                b43legacy_radio_write16(dev, 0x005C, 0x00B0);
        }
        b43legacy_radio_write16(dev, 0x007A,
                                (b43legacy_radio_read16(dev,
                                0x007A) & 0x00F8) | 0x0007);

        b43legacy_radio_selectchannel(dev, old_channel, 0);

        b43legacy_phy_write(dev, 0x0014, 0x0200);
        if (phy->radio_rev >= 6)
                b43legacy_phy_write(dev, 0x002A, 0x88C2);
        else
                b43legacy_phy_write(dev, 0x002A, 0x8AC0);
        b43legacy_phy_write(dev, 0x0038, 0x0668);
        b43legacy_radio_set_txpower_bg(dev, 0xFFFF, 0xFFFF, 0xFFFF);
        if (phy->radio_rev == 4 || phy->radio_rev == 5)
                b43legacy_phy_write(dev, 0x005D, (b43legacy_phy_read(dev,
                                    0x005D) & 0xFF80) | 0x0003);
        if (phy->radio_rev <= 2)
                b43legacy_radio_write16(dev, 0x005D, 0x000D);

        if (phy->analog == 4) {
                b43legacy_write16(dev, 0x03E4, 0x0009);
                b43legacy_phy_write(dev, 0x61, b43legacy_phy_read(dev, 0x61)
                                    & 0xFFF);
        } else
                b43legacy_phy_write(dev, 0x0002, (b43legacy_phy_read(dev,
                                    0x0002) & 0xFFC0) | 0x0004);
        if (phy->type == B43legacy_PHYTYPE_G)
                b43legacy_write16(dev, 0x03E6, 0x0);
        if (phy->type == B43legacy_PHYTYPE_B) {
                b43legacy_write16(dev, 0x03E6, 0x8140);
                b43legacy_phy_write(dev, 0x0016, 0x0410);
                b43legacy_phy_write(dev, 0x0017, 0x0820);
                b43legacy_phy_write(dev, 0x0062, 0x0007);
                b43legacy_radio_init2050(dev);
                b43legacy_phy_lo_g_measure(dev);
                if (dev->dev->bus->sprom.boardflags_lo &
                    B43legacy_BFL_RSSI) {
                        b43legacy_calc_nrssi_slope(dev);
                        b43legacy_calc_nrssi_threshold(dev);
                }
                b43legacy_phy_init_pctl(dev);
        }
}

static void b43legacy_calc_loopback_gain(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;
        u16 backup_phy[15] = {0};
        u16 backup_radio[3];
        u16 backup_bband;
        u16 i;
        u16 loop1_cnt;
        u16 loop1_done;
        u16 loop1_omitted;
        u16 loop2_done;

        backup_phy[0] = b43legacy_phy_read(dev, 0x0429);
        backup_phy[1] = b43legacy_phy_read(dev, 0x0001);
        backup_phy[2] = b43legacy_phy_read(dev, 0x0811);
        backup_phy[3] = b43legacy_phy_read(dev, 0x0812);
        if (phy->rev != 1) {
                backup_phy[4] = b43legacy_phy_read(dev, 0x0814);
                backup_phy[5] = b43legacy_phy_read(dev, 0x0815);
        }
        backup_phy[6] = b43legacy_phy_read(dev, 0x005A);
        backup_phy[7] = b43legacy_phy_read(dev, 0x0059);
        backup_phy[8] = b43legacy_phy_read(dev, 0x0058);
        backup_phy[9] = b43legacy_phy_read(dev, 0x000A);
        backup_phy[10] = b43legacy_phy_read(dev, 0x0003);
        backup_phy[11] = b43legacy_phy_read(dev, 0x080F);
        backup_phy[12] = b43legacy_phy_read(dev, 0x0810);
        backup_phy[13] = b43legacy_phy_read(dev, 0x002B);
        backup_phy[14] = b43legacy_phy_read(dev, 0x0015);
        b43legacy_phy_read(dev, 0x002D); /* dummy read */
        backup_bband = phy->bbatt;
        backup_radio[0] = b43legacy_radio_read16(dev, 0x0052);
        backup_radio[1] = b43legacy_radio_read16(dev, 0x0043);
        backup_radio[2] = b43legacy_radio_read16(dev, 0x007A);

        b43legacy_phy_write(dev, 0x0429,
                            b43legacy_phy_read(dev, 0x0429) & 0x3FFF);
        b43legacy_phy_write(dev, 0x0001,
                            b43legacy_phy_read(dev, 0x0001) & 0x8000);
        b43legacy_phy_write(dev, 0x0811,
                            b43legacy_phy_read(dev, 0x0811) | 0x0002);
        b43legacy_phy_write(dev, 0x0812,
                            b43legacy_phy_read(dev, 0x0812) & 0xFFFD);
        b43legacy_phy_write(dev, 0x0811,
                            b43legacy_phy_read(dev, 0x0811) | 0x0001);
        b43legacy_phy_write(dev, 0x0812,
                            b43legacy_phy_read(dev, 0x0812) & 0xFFFE);
        if (phy->rev != 1) {
                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, 0x0814,
                                    b43legacy_phy_read(dev, 0x0814) | 0x0002);
                b43legacy_phy_write(dev, 0x0815,
                                    b43legacy_phy_read(dev, 0x0815) & 0xFFFD);
        }
        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)
                            & 0xFFCF) | 0x0030);
        b43legacy_phy_write(dev, 0x0812, (b43legacy_phy_read(dev, 0x0812)
                            & 0xFFCF) | 0x0010);

        b43legacy_phy_write(dev, 0x005A, 0x0780);
        b43legacy_phy_write(dev, 0x0059, 0xC810);
        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);
        if (phy->rev != 1) {
                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);
        if (phy->radio_ver == 0x2050 && phy->radio_rev == 2) {
                b43legacy_radio_write16(dev, 0x0052, 0x0000);
                b43legacy_radio_write16(dev, 0x0043,
                                        (b43legacy_radio_read16(dev, 0x0043)
                                         & 0xFFF0) | 0x0009);
                loop1_cnt = 9;
        } else if (phy->radio_rev == 8) {
                b43legacy_radio_write16(dev, 0x0043, 0x000F);
                loop1_cnt = 15;
        } else
                loop1_cnt = 0;

        b43legacy_phy_set_baseband_attenuation(dev, 11);

        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, 0x002B,
                            (b43legacy_phy_read(dev, 0x002B)
                             & 0xFFC0) | 0x0001);
        b43legacy_phy_write(dev, 0x002B,
                            (b43legacy_phy_read(dev, 0x002B)
                             & 0xC0FF) | 0x0800);
        b43legacy_phy_write(dev, 0x0811,
                            b43legacy_phy_read(dev, 0x0811) | 0x0100);
        b43legacy_phy_write(dev, 0x0812,
                            b43legacy_phy_read(dev, 0x0812) & 0xCFFF);
        if (dev->dev->bus->sprom.boardflags_lo & B43legacy_BFL_EXTLNA) {
                if (phy->rev >= 7) {
                        b43legacy_phy_write(dev, 0x0811,
                                            b43legacy_phy_read(dev, 0x0811)
                                            | 0x0800);
                        b43legacy_phy_write(dev, 0x0812,
                                            b43legacy_phy_read(dev, 0x0812)
                                            | 0x8000);
                }
        }
        b43legacy_radio_write16(dev, 0x007A,
                                b43legacy_radio_read16(dev, 0x007A)
                                & 0x00F7);

        for (i = 0; i < loop1_cnt; i++) {
                b43legacy_radio_write16(dev, 0x0043, loop1_cnt);
                b43legacy_phy_write(dev, 0x0812,
                                    (b43legacy_phy_read(dev, 0x0812)
                                     & 0xF0FF) | (i << 8));
                b43legacy_phy_write(dev, 0x0015,
                                    (b43legacy_phy_read(dev, 0x0015)
                                     & 0x0FFF) | 0xA000);
                b43legacy_phy_write(dev, 0x0015,
                                    (b43legacy_phy_read(dev, 0x0015)
                                     & 0x0FFF) | 0xF000);
                udelay(20);
                if (b43legacy_phy_read(dev, 0x002D) >= 0x0DFC)
                        break;
        }
        loop1_done = i;
        loop1_omitted = loop1_cnt - loop1_done;

        loop2_done = 0;
        if (loop1_done >= 8) {
                b43legacy_phy_write(dev, 0x0812,
                                    b43legacy_phy_read(dev, 0x0812)
                                    | 0x0030);
                for (i = loop1_done - 8; i < 16; i++) {
                        b43legacy_phy_write(dev, 0x0812,
                                            (b43legacy_phy_read(dev, 0x0812)
                                             & 0xF0FF) | (i << 8));
                        b43legacy_phy_write(dev, 0x0015,
                                            (b43legacy_phy_read(dev, 0x0015)
                                             & 0x0FFF) | 0xA000);
                        b43legacy_phy_write(dev, 0x0015,
                                            (b43legacy_phy_read(dev, 0x0015)
                                             & 0x0FFF) | 0xF000);
                        udelay(20);
                        if (b43legacy_phy_read(dev, 0x002D) >= 0x0DFC)
                                break;
                }
        }

        if (phy->rev != 1) {
                b43legacy_phy_write(dev, 0x0814, backup_phy[4]);
                b43legacy_phy_write(dev, 0x0815, backup_phy[5]);
        }
        b43legacy_phy_write(dev, 0x005A, backup_phy[6]);
        b43legacy_phy_write(dev, 0x0059, backup_phy[7]);
        b43legacy_phy_write(dev, 0x0058, backup_phy[8]);
        b43legacy_phy_write(dev, 0x000A, backup_phy[9]);
        b43legacy_phy_write(dev, 0x0003, backup_phy[10]);
        b43legacy_phy_write(dev, 0x080F, backup_phy[11]);
        b43legacy_phy_write(dev, 0x0810, backup_phy[12]);
        b43legacy_phy_write(dev, 0x002B, backup_phy[13]);
        b43legacy_phy_write(dev, 0x0015, backup_phy[14]);

        b43legacy_phy_set_baseband_attenuation(dev, backup_bband);

        b43legacy_radio_write16(dev, 0x0052, backup_radio[0]);
        b43legacy_radio_write16(dev, 0x0043, backup_radio[1]);
        b43legacy_radio_write16(dev, 0x007A, backup_radio[2]);

        b43legacy_phy_write(dev, 0x0811, backup_phy[2] | 0x0003);
        udelay(10);
        b43legacy_phy_write(dev, 0x0811, backup_phy[2]);
        b43legacy_phy_write(dev, 0x0812, backup_phy[3]);

        b43legacy_phy_write(dev, 0x0429, backup_phy[0]);
        b43legacy_phy_write(dev, 0x0001, backup_phy[1]);

        phy->loopback_gain[0] = ((loop1_done * 6) - (loop1_omitted * 4)) - 11;
        phy->loopback_gain[1] = (24 - (3 * loop2_done)) * 2;
}

static void b43legacy_phy_initg(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;
        u16 tmp;

        if (phy->rev == 1)
                b43legacy_phy_initb5(dev);
        else
                b43legacy_phy_initb6(dev);
        if (phy->rev >= 2 && phy->gmode)
                b43legacy_phy_inita(dev);

        if (phy->rev >= 2) {
                b43legacy_phy_write(dev, 0x0814, 0x0000);
                b43legacy_phy_write(dev, 0x0815, 0x0000);
        }
        if (phy->rev == 2) {
                b43legacy_phy_write(dev, 0x0811, 0x0000);
                b43legacy_phy_write(dev, 0x0015, 0x00C0);
        }
        if (phy->rev > 5) {
                b43legacy_phy_write(dev, 0x0811, 0x0400);
                b43legacy_phy_write(dev, 0x0015, 0x00C0);
        }
        if (phy->gmode) {
                tmp = b43legacy_phy_read(dev, 0x0400) & 0xFF;
                if (tmp == 3) {
                        b43legacy_phy_write(dev, 0x04C2, 0x1816);
                        b43legacy_phy_write(dev, 0x04C3, 0x8606);
                }
                if (tmp == 4 || tmp == 5) {
                        b43legacy_phy_write(dev, 0x04C2, 0x1816);
                        b43legacy_phy_write(dev, 0x04C3, 0x8006);
                        b43legacy_phy_write(dev, 0x04CC,
                                            (b43legacy_phy_read(dev,
                                             0x04CC) & 0x00FF) |
                                             0x1F00);
                }
                if (phy->rev >= 2)
                        b43legacy_phy_write(dev, 0x047E, 0x0078);
        }
        if (phy->radio_rev == 8) {
                b43legacy_phy_write(dev, 0x0801, b43legacy_phy_read(dev, 0x0801)
                                    | 0x0080);
                b43legacy_phy_write(dev, 0x043E, b43legacy_phy_read(dev, 0x043E)
                                    | 0x0004);
        }
        if (phy->rev >= 2 && phy->gmode)
                b43legacy_calc_loopback_gain(dev);
        if (phy->radio_rev != 8) {
                if (phy->initval == 0xFFFF)
                        phy->initval = b43legacy_radio_init2050(dev);
                else
                        b43legacy_radio_write16(dev, 0x0078, phy->initval);
        }
        if (phy->txctl2 == 0xFFFF)
                b43legacy_phy_lo_g_measure(dev);
        else {
                if (phy->radio_ver == 0x2050 && phy->radio_rev == 8)
                        b43legacy_radio_write16(dev, 0x0052,
                                                (phy->txctl1 << 4) |
                                                phy->txctl2);
                else
                        b43legacy_radio_write16(dev, 0x0052,
                                                (b43legacy_radio_read16(dev,
                                                 0x0052) & 0xFFF0) |
                                                 phy->txctl1);
                if (phy->rev >= 6)
                        b43legacy_phy_write(dev, 0x0036,
                                            (b43legacy_phy_read(dev, 0x0036)
                                             & 0x0FFF) | (phy->txctl2 << 12));
                if (dev->dev->bus->sprom.boardflags_lo &
                    B43legacy_BFL_PACTRL)
                        b43legacy_phy_write(dev, 0x002E, 0x8075);
                else
                        b43legacy_phy_write(dev, 0x002E, 0x807F);
                if (phy->rev < 2)
                        b43legacy_phy_write(dev, 0x002F, 0x0101);
                else
                        b43legacy_phy_write(dev, 0x002F, 0x0202);
        }
        if (phy->gmode) {
                b43legacy_phy_lo_adjust(dev, 0);
                b43legacy_phy_write(dev, 0x080F, 0x8078);
        }

        if (!(dev->dev->bus->sprom.boardflags_lo & B43legacy_BFL_RSSI)) {
                /* The specs state to update the NRSSI LT with
                 * the value 0x7FFFFFFF here. I think that is some weird
                 * compiler optimization in the original driver.
                 * Essentially, what we do here is resetting all NRSSI LT
                 * entries to -32 (see the clamp_val() in nrssi_hw_update())
                 */
                b43legacy_nrssi_hw_update(dev, 0xFFFF);
                b43legacy_calc_nrssi_threshold(dev);
        } else if (phy->gmode || phy->rev >= 2) {
                if (phy->nrssi[0] == -1000) {
                        B43legacy_WARN_ON(phy->nrssi[1] != -1000);
                        b43legacy_calc_nrssi_slope(dev);
                } else {
                        B43legacy_WARN_ON(phy->nrssi[1] == -1000);
                        b43legacy_calc_nrssi_threshold(dev);
                }
        }
        if (phy->radio_rev == 8)
                b43legacy_phy_write(dev, 0x0805, 0x3230);
        b43legacy_phy_init_pctl(dev);
        if (dev->dev->bus->chip_id == 0x4306
            && dev->dev->bus->chip_package == 2) {
                b43legacy_phy_write(dev, 0x0429,
                                    b43legacy_phy_read(dev, 0x0429) & 0xBFFF);
                b43legacy_phy_write(dev, 0x04C3,
                                    b43legacy_phy_read(dev, 0x04C3) & 0x7FFF);
        }
}

static u16 b43legacy_phy_lo_b_r15_loop(struct b43legacy_wldev *dev)
{
        int i;
        u16 ret = 0;
        unsigned long flags;

        local_irq_save(flags);
        for (i = 0; i < 10; i++) {
                b43legacy_phy_write(dev, 0x0015, 0xAFA0);
                udelay(1);
                b43legacy_phy_write(dev, 0x0015, 0xEFA0);
                udelay(10);
                b43legacy_phy_write(dev, 0x0015, 0xFFA0);
                udelay(40);
                ret += b43legacy_phy_read(dev, 0x002C);
        }
        local_irq_restore(flags);
        b43legacy_voluntary_preempt();

        return ret;
}

void b43legacy_phy_lo_b_measure(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;
        u16 regstack[12] = { 0 };
        u16 mls;
        u16 fval;
        int i;
        int j;

        regstack[0] = b43legacy_phy_read(dev, 0x0015);
        regstack[1] = b43legacy_radio_read16(dev, 0x0052) & 0xFFF0;

        if (phy->radio_ver == 0x2053) {
                regstack[2] = b43legacy_phy_read(dev, 0x000A);
                regstack[3] = b43legacy_phy_read(dev, 0x002A);
                regstack[4] = b43legacy_phy_read(dev, 0x0035);
                regstack[5] = b43legacy_phy_read(dev, 0x0003);
                regstack[6] = b43legacy_phy_read(dev, 0x0001);
                regstack[7] = b43legacy_phy_read(dev, 0x0030);

                regstack[8] = b43legacy_radio_read16(dev, 0x0043);
                regstack[9] = b43legacy_radio_read16(dev, 0x007A);
                regstack[10] = b43legacy_read16(dev, 0x03EC);
                regstack[11] = b43legacy_radio_read16(dev, 0x0052) & 0x00F0;

                b43legacy_phy_write(dev, 0x0030, 0x00FF);
                b43legacy_write16(dev, 0x03EC, 0x3F3F);
                b43legacy_phy_write(dev, 0x0035, regstack[4] & 0xFF7F);
                b43legacy_radio_write16(dev, 0x007A, regstack[9] & 0xFFF0);
        }
        b43legacy_phy_write(dev, 0x0015, 0xB000);
        b43legacy_phy_write(dev, 0x002B, 0x0004);

        if (phy->radio_ver == 0x2053) {
                b43legacy_phy_write(dev, 0x002B, 0x0203);
                b43legacy_phy_write(dev, 0x002A, 0x08A3);
        }

        phy->minlowsig[0] = 0xFFFF;

        for (i = 0; i < 4; i++) {
                b43legacy_radio_write16(dev, 0x0052, regstack[1] | i);
                b43legacy_phy_lo_b_r15_loop(dev);
        }
        for (i = 0; i < 10; i++) {
                b43legacy_radio_write16(dev, 0x0052, regstack[1] | i);
                mls = b43legacy_phy_lo_b_r15_loop(dev) / 10;
                if (mls < phy->minlowsig[0]) {
                        phy->minlowsig[0] = mls;
                        phy->minlowsigpos[0] = i;
                }
        }
        b43legacy_radio_write16(dev, 0x0052, regstack[1]
                                | phy->minlowsigpos[0]);

        phy->minlowsig[1] = 0xFFFF;

        for (i = -4; i < 5; i += 2) {
                for (j = -4; j < 5; j += 2) {
                        if (j < 0)
                                fval = (0x0100 * i) + j + 0x0100;
                        else
                                fval = (0x0100 * i) + j;
                        b43legacy_phy_write(dev, 0x002F, fval);
                        mls = b43legacy_phy_lo_b_r15_loop(dev) / 10;
                        if (mls < phy->minlowsig[1]) {
                                phy->minlowsig[1] = mls;
                                phy->minlowsigpos[1] = fval;
                        }
                }
        }
        phy->minlowsigpos[1] += 0x0101;

        b43legacy_phy_write(dev, 0x002F, phy->minlowsigpos[1]);
        if (phy->radio_ver == 0x2053) {
                b43legacy_phy_write(dev, 0x000A, regstack[2]);
                b43legacy_phy_write(dev, 0x002A, regstack[3]);
                b43legacy_phy_write(dev, 0x0035, regstack[4]);
                b43legacy_phy_write(dev, 0x0003, regstack[5]);
                b43legacy_phy_write(dev, 0x0001, regstack[6]);
                b43legacy_phy_write(dev, 0x0030, regstack[7]);

                b43legacy_radio_write16(dev, 0x0043, regstack[8]);
                b43legacy_radio_write16(dev, 0x007A, regstack[9]);

                b43legacy_radio_write16(dev, 0x0052,
                                        (b43legacy_radio_read16(dev, 0x0052)
                                        & 0x000F) | regstack[11]);

                b43legacy_write16(dev, 0x03EC, regstack[10]);
        }
        b43legacy_phy_write(dev, 0x0015, regstack[0]);
}

static inline
u16 b43legacy_phy_lo_g_deviation_subval(struct b43legacy_wldev *dev,
                                        u16 control)
{
        struct b43legacy_phy *phy = &dev->phy;
        u16 ret;
        unsigned long flags;

        local_irq_save(flags);
        if (phy->gmode) {
                b43legacy_phy_write(dev, 0x15, 0xE300);
                control <<= 8;
                b43legacy_phy_write(dev, 0x0812, control | 0x00B0);
                udelay(5);
                b43legacy_phy_write(dev, 0x0812, control | 0x00B2);
                udelay(2);
                b43legacy_phy_write(dev, 0x0812, control | 0x00B3);
                udelay(4);
                b43legacy_phy_write(dev, 0x0015, 0xF300);
                udelay(8);
        } else {
                b43legacy_phy_write(dev, 0x0015, control | 0xEFA0);
                udelay(2);
                b43legacy_phy_write(dev, 0x0015, control | 0xEFE0);
                udelay(4);
                b43legacy_phy_write(dev, 0x0015, control | 0xFFE0);
                udelay(8);
        }
        ret = b43legacy_phy_read(dev, 0x002D);
        local_irq_restore(flags);
        b43legacy_voluntary_preempt();

        return ret;
}

static u32 b43legacy_phy_lo_g_singledeviation(struct b43legacy_wldev *dev,
                                              u16 control)
{
        int i;
        u32 ret = 0;

        for (i = 0; i < 8; i++)
                ret += b43legacy_phy_lo_g_deviation_subval(dev, control);

        return ret;
}

/* Write the LocalOscillator CONTROL */
static inline
void b43legacy_lo_write(struct b43legacy_wldev *dev,
                        struct b43legacy_lopair *pair)
{
        u16 value;

        value = (u8)(pair->low);
        value |= ((u8)(pair->high)) << 8;

#ifdef CONFIG_B43LEGACY_DEBUG
        /* Sanity check. */
        if (pair->low < -8 || pair->low > 8 ||
            pair->high < -8 || pair->high > 8) {
                b43legacydbg(dev->wl,
                       "WARNING: Writing invalid LOpair "
                       "(low: %d, high: %d)\n",
                       pair->low, pair->high);
                dump_stack();
        }
#endif

        b43legacy_phy_write(dev, B43legacy_PHY_G_LO_CONTROL, value);
}

static inline
struct b43legacy_lopair *b43legacy_find_lopair(struct b43legacy_wldev *dev,
                                               u16 bbatt,
                                               u16 rfatt,
                                               u16 tx)
{
        static const u8 dict[10] = { 11, 10, 11, 12, 13, 12, 13, 12, 13, 12 };
        struct b43legacy_phy *phy = &dev->phy;

        if (bbatt > 6)
                bbatt = 6;
        B43legacy_WARN_ON(rfatt >= 10);

        if (tx == 3)
                return b43legacy_get_lopair(phy, rfatt, bbatt);
        return b43legacy_get_lopair(phy, dict[rfatt], bbatt);
}

static inline
struct b43legacy_lopair *b43legacy_current_lopair(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;

        return b43legacy_find_lopair(dev, phy->bbatt,
                                     phy->rfatt, phy->txctl1);
}

/* Adjust B/G LO */
void b43legacy_phy_lo_adjust(struct b43legacy_wldev *dev, int fixed)
{
        struct b43legacy_lopair *pair;

        if (fixed) {
                /* Use fixed values. Only for initialization. */
                pair = b43legacy_find_lopair(dev, 2, 3, 0);
        } else
                pair = b43legacy_current_lopair(dev);
        b43legacy_lo_write(dev, pair);
}

static void b43legacy_phy_lo_g_measure_txctl2(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;
        u16 txctl2 = 0;
        u16 i;
        u32 smallest;
        u32 tmp;

        b43legacy_radio_write16(dev, 0x0052, 0x0000);
        udelay(10);
        smallest = b43legacy_phy_lo_g_singledeviation(dev, 0);
        for (i = 0; i < 16; i++) {
                b43legacy_radio_write16(dev, 0x0052, i);
                udelay(10);
                tmp = b43legacy_phy_lo_g_singledeviation(dev, 0);
                if (tmp < smallest) {
                        smallest = tmp;
                        txctl2 = i;
                }
        }
        phy->txctl2 = txctl2;
}

static
void b43legacy_phy_lo_g_state(struct b43legacy_wldev *dev,
                              const struct b43legacy_lopair *in_pair,
                              struct b43legacy_lopair *out_pair,
                              u16 r27)
{
        static const struct b43legacy_lopair transitions[8] = {
                { .high =  1,  .low =  1, },
                { .high =  1,  .low =  0, },
                { .high =  1,  .low = -1, },
                { .high =  0,  .low = -1, },
                { .high = -1,  .low = -1, },
                { .high = -1,  .low =  0, },
                { .high = -1,  .low =  1, },
                { .high =  0,  .low =  1, },
        };
        struct b43legacy_lopair lowest_transition = {
                .high = in_pair->high,
                .low = in_pair->low,
        };
        struct b43legacy_lopair tmp_pair;
        struct b43legacy_lopair transition;
        int i = 12;
        int state = 0;
        int found_lower;
        int j;
        int begin;
        int end;
        u32 lowest_deviation;
        u32 tmp;

        /* Note that in_pair and out_pair can point to the same pair.
         * Be careful. */

        b43legacy_lo_write(dev, &lowest_transition);
        lowest_deviation = b43legacy_phy_lo_g_singledeviation(dev, r27);
        do {
                found_lower = 0;
                B43legacy_WARN_ON(!(state >= 0 && state <= 8));
                if (state == 0) {
                        begin = 1;
                        end = 8;
                } else if (state % 2 == 0) {
                        begin = state - 1;
                        end = state + 1;
                } else {
                        begin = state - 2;
                        end = state + 2;
                }
                if (begin < 1)
                        begin += 8;
                if (end > 8)
                        end -= 8;

                j = begin;
                tmp_pair.high = lowest_transition.high;
                tmp_pair.low = lowest_transition.low;
                while (1) {
                        B43legacy_WARN_ON(!(j >= 1 && j <= 8));
                        transition.high = tmp_pair.high +
                                          transitions[j - 1].high;
                        transition.low = tmp_pair.low + transitions[j - 1].low;
                        if ((abs(transition.low) < 9)
                             && (abs(transition.high) < 9)) {
                                b43legacy_lo_write(dev, &transition);
                                tmp = b43legacy_phy_lo_g_singledeviation(dev,
                                                                       r27);
                                if (tmp < lowest_deviation) {
                                        lowest_deviation = tmp;
                                        state = j;
                                        found_lower = 1;

                                        lowest_transition.high =
                                                                transition.high;
                                        lowest_transition.low = transition.low;
                                }
                        }
                        if (j == end)
                                break;
                        if (j == 8)
                                j = 1;
                        else
                                j++;
                }
        } while (i-- && found_lower);

        out_pair->high = lowest_transition.high;
        out_pair->low = lowest_transition.low;
}

/* Set the baseband attenuation value on chip. */
void b43legacy_phy_set_baseband_attenuation(struct b43legacy_wldev *dev,
                                            u16 bbatt)
{
        struct b43legacy_phy *phy = &dev->phy;
        u16 value;

        if (phy->analog == 0) {
                value = (b43legacy_read16(dev, 0x03E6) & 0xFFF0);
                value |= (bbatt & 0x000F);
                b43legacy_write16(dev, 0x03E6, value);
                return;
        }

        if (phy->analog > 1) {
                value = b43legacy_phy_read(dev, 0x0060) & 0xFFC3;
                value |= (bbatt << 2) & 0x003C;
        } else {
                value = b43legacy_phy_read(dev, 0x0060) & 0xFF87;
                value |= (bbatt << 3) & 0x0078;
        }
        b43legacy_phy_write(dev, 0x0060, value);
}

/* http://bcm-specs.sipsolutions.net/LocalOscillator/Measure */
void b43legacy_phy_lo_g_measure(struct b43legacy_wldev *dev)
{
        static const u8 pairorder[10] = { 3, 1, 5, 7, 9, 2, 0, 4, 6, 8 };
        const int is_initializing = (b43legacy_status(dev)
                                     < B43legacy_STAT_STARTED);
        struct b43legacy_phy *phy = &dev->phy;
        u16 h;
        u16 i;
        u16 oldi = 0;
        u16 j;
        struct b43legacy_lopair control;
        struct b43legacy_lopair *tmp_control;
        u16 tmp;
        u16 regstack[16] = { 0 };
        u8 oldchannel;

        /* XXX: What are these? */
        u8 r27 = 0;
        u16 r31;

        oldchannel = phy->channel;
        /* Setup */
        if (phy->gmode) {
                regstack[0] = b43legacy_phy_read(dev, B43legacy_PHY_G_CRS);
                regstack[1] = b43legacy_phy_read(dev, 0x0802);
                b43legacy_phy_write(dev, B43legacy_PHY_G_CRS, regstack[0]
                                    & 0x7FFF);
                b43legacy_phy_write(dev, 0x0802, regstack[1] & 0xFFFC);
        }
        regstack[3] = b43legacy_read16(dev, 0x03E2);
        b43legacy_write16(dev, 0x03E2, regstack[3] | 0x8000);
        regstack[4] = b43legacy_read16(dev, B43legacy_MMIO_CHANNEL_EXT);
        regstack[5] = b43legacy_phy_read(dev, 0x15);
        regstack[6] = b43legacy_phy_read(dev, 0x2A);
        regstack[7] = b43legacy_phy_read(dev, 0x35);
        regstack[8] = b43legacy_phy_read(dev, 0x60);
        regstack[9] = b43legacy_radio_read16(dev, 0x43);
        regstack[10] = b43legacy_radio_read16(dev, 0x7A);
        regstack[11] = b43legacy_radio_read16(dev, 0x52);
        if (phy->gmode) {
                regstack[12] = b43legacy_phy_read(dev, 0x0811);
                regstack[13] = b43legacy_phy_read(dev, 0x0812);
                regstack[14] = b43legacy_phy_read(dev, 0x0814);
                regstack[15] = b43legacy_phy_read(dev, 0x0815);
        }
        b43legacy_radio_selectchannel(dev, 6, 0);
        if (phy->gmode) {
                b43legacy_phy_write(dev, B43legacy_PHY_G_CRS, regstack[0]
                                    & 0x7FFF);
                b43legacy_phy_write(dev, 0x0802, regstack[1] & 0xFFFC);
                b43legacy_dummy_transmission(dev);
        }
        b43legacy_radio_write16(dev, 0x0043, 0x0006);

        b43legacy_phy_set_baseband_attenuation(dev, 2);

        b43legacy_write16(dev, B43legacy_MMIO_CHANNEL_EXT, 0x0000);
        b43legacy_phy_write(dev, 0x002E, 0x007F);
        b43legacy_phy_write(dev, 0x080F, 0x0078);
        b43legacy_phy_write(dev, 0x0035, regstack[7] & ~(1 << 7));
        b43legacy_radio_write16(dev, 0x007A, regstack[10] & 0xFFF0);
        b43legacy_phy_write(dev, 0x002B, 0x0203);
        b43legacy_phy_write(dev, 0x002A, 0x08A3);
        if (phy->gmode) {
                b43legacy_phy_write(dev, 0x0814, regstack[14] | 0x0003);
                b43legacy_phy_write(dev, 0x0815, regstack[15] & 0xFFFC);
                b43legacy_phy_write(dev, 0x0811, 0x01B3);
                b43legacy_phy_write(dev, 0x0812, 0x00B2);
        }
        if (is_initializing)
                b43legacy_phy_lo_g_measure_txctl2(dev);
        b43legacy_phy_write(dev, 0x080F, 0x8078);

        /* Measure */
        control.low = 0;
        control.high = 0;
        for (h = 0; h < 10; h++) {
                /* Loop over each possible RadioAttenuation (0-9) */
                i = pairorder[h];
                if (is_initializing) {
                        if (i == 3) {
                                control.low = 0;
                                control.high = 0;
                        } else if (((i % 2 == 1) && (oldi % 2 == 1)) ||
                                  ((i % 2 == 0) && (oldi % 2 == 0))) {
                                tmp_control = b43legacy_get_lopair(phy, oldi,
                                                                   0);
                                memcpy(&control, tmp_control, sizeof(control));
                        } else {
                                tmp_control = b43legacy_get_lopair(phy, 3, 0);
                                memcpy(&control, tmp_control, sizeof(control));
                        }
                }
                /* Loop over each possible BasebandAttenuation/2 */
                for (j = 0; j < 4; j++) {
                        if (is_initializing) {
                                tmp = i * 2 + j;
                                r27 = 0;
                                r31 = 0;
                                if (tmp > 14) {
                                        r31 = 1;
                                        if (tmp > 17)
                                                r27 = 1;
                                        if (tmp > 19)
                                                r27 = 2;
                                }
                        } else {
                                tmp_control = b43legacy_get_lopair(phy, i,
                                                                   j * 2);
                                if (!tmp_control->used)
                                        continue;
                                memcpy(&control, tmp_control, sizeof(control));
                                r27 = 3;
                                r31 = 0;
                        }
                        b43legacy_radio_write16(dev, 0x43, i);
                        b43legacy_radio_write16(dev, 0x52, phy->txctl2);
                        udelay(10);
                        b43legacy_voluntary_preempt();

                        b43legacy_phy_set_baseband_attenuation(dev, j * 2);

                        tmp = (regstack[10] & 0xFFF0);
                        if (r31)
                                tmp |= 0x0008;
                        b43legacy_radio_write16(dev, 0x007A, tmp);

                        tmp_control = b43legacy_get_lopair(phy, i, j * 2);
                        b43legacy_phy_lo_g_state(dev, &control, tmp_control,
                                                 r27);
                }
                oldi = i;
        }
        /* Loop over each possible RadioAttenuation (10-13) */
        for (i = 10; i < 14; i++) {
                /* Loop over each possible BasebandAttenuation/2 */
                for (j = 0; j < 4; j++) {
                        if (is_initializing) {
                                tmp_control = b43legacy_get_lopair(phy, i - 9,
                                                                 j * 2);
                                memcpy(&control, tmp_control, sizeof(control));
                                /* FIXME: The next line is wrong, as the
                                 * following if statement can never trigger. */
                                tmp = (i - 9) * 2 + j - 5;
                                r27 = 0;
                                r31 = 0;
                                if (tmp > 14) {
                                        r31 = 1;
                                        if (tmp > 17)
                                                r27 = 1;
                                        if (tmp > 19)
                                                r27 = 2;
                                }
                        } else {
                                tmp_control = b43legacy_get_lopair(phy, i - 9,
                                                                   j * 2);
                                if (!tmp_control->used)
                                        continue;
                                memcpy(&control, tmp_control, sizeof(control));
                                r27 = 3;
                                r31 = 0;
                        }
                        b43legacy_radio_write16(dev, 0x43, i - 9);
                        /* FIXME: shouldn't txctl1 be zero in the next line
                         * and 3 in the loop above? */
                        b43legacy_radio_write16(dev, 0x52,
                                              phy->txctl2
                                              | (3/*txctl1*/ << 4));
                        udelay(10);
                        b43legacy_voluntary_preempt();

                        b43legacy_phy_set_baseband_attenuation(dev, j * 2);

                        tmp = (regstack[10] & 0xFFF0);
                        if (r31)
                                tmp |= 0x0008;
                        b43legacy_radio_write16(dev, 0x7A, tmp);

                        tmp_control = b43legacy_get_lopair(phy, i, j * 2);
                        b43legacy_phy_lo_g_state(dev, &control, tmp_control,
                                                 r27);
                }
        }

        /* Restoration */
        if (phy->gmode) {
                b43legacy_phy_write(dev, 0x0015, 0xE300);
                b43legacy_phy_write(dev, 0x0812, (r27 << 8) | 0xA0);
                udelay(5);
                b43legacy_phy_write(dev, 0x0812, (r27 << 8) | 0xA2);
                udelay(2);
                b43legacy_phy_write(dev, 0x0812, (r27 << 8) | 0xA3);
                b43legacy_voluntary_preempt();
        } else
                b43legacy_phy_write(dev, 0x0015, r27 | 0xEFA0);
        b43legacy_phy_lo_adjust(dev, is_initializing);
        b43legacy_phy_write(dev, 0x002E, 0x807F);
        if (phy->gmode)
                b43legacy_phy_write(dev, 0x002F, 0x0202);
        else
                b43legacy_phy_write(dev, 0x002F, 0x0101);
        b43legacy_write16(dev, B43legacy_MMIO_CHANNEL_EXT, regstack[4]);
        b43legacy_phy_write(dev, 0x0015, regstack[5]);
        b43legacy_phy_write(dev, 0x002A, regstack[6]);
        b43legacy_phy_write(dev, 0x0035, regstack[7]);
        b43legacy_phy_write(dev, 0x0060, regstack[8]);
        b43legacy_radio_write16(dev, 0x0043, regstack[9]);
        b43legacy_radio_write16(dev, 0x007A, regstack[10]);
        regstack[11] &= 0x00F0;
        regstack[11] |= (b43legacy_radio_read16(dev, 0x52) & 0x000F);
        b43legacy_radio_write16(dev, 0x52, regstack[11]);
        b43legacy_write16(dev, 0x03E2, regstack[3]);
        if (phy->gmode) {
                b43legacy_phy_write(dev, 0x0811, regstack[12]);
                b43legacy_phy_write(dev, 0x0812, regstack[13]);
                b43legacy_phy_write(dev, 0x0814, regstack[14]);
                b43legacy_phy_write(dev, 0x0815, regstack[15]);
                b43legacy_phy_write(dev, B43legacy_PHY_G_CRS, regstack[0]);
                b43legacy_phy_write(dev, 0x0802, regstack[1]);
        }
        b43legacy_radio_selectchannel(dev, oldchannel, 1);

#ifdef CONFIG_B43LEGACY_DEBUG
        {
                /* Sanity check for all lopairs. */
                for (i = 0; i < B43legacy_LO_COUNT; i++) {
                        tmp_control = phy->_lo_pairs + i;
                        if (tmp_control->low < -8 || tmp_control->low > 8 ||
                            tmp_control->high < -8 || tmp_control->high > 8)
                                b43legacywarn(dev->wl,
                                       "WARNING: Invalid LOpair (low: %d, high:"
                                       " %d, index: %d)\n",
                                       tmp_control->low, tmp_control->high, i);
                }
        }
#endif /* CONFIG_B43LEGACY_DEBUG */
}

static
void b43legacy_phy_lo_mark_current_used(struct b43legacy_wldev *dev)
{
        struct b43legacy_lopair *pair;

        pair = b43legacy_current_lopair(dev);
        pair->used = 1;
}

void b43legacy_phy_lo_mark_all_unused(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;
        struct b43legacy_lopair *pair;
        int i;

        for (i = 0; i < B43legacy_LO_COUNT; i++) {
                pair = phy->_lo_pairs + i;
                pair->used = 0;
        }
}

/* http://bcm-specs.sipsolutions.net/EstimatePowerOut
 * This function converts a TSSI value to dBm in Q5.2
 */
static s8 b43legacy_phy_estimate_power_out(struct b43legacy_wldev *dev, s8 tssi)
{
        struct b43legacy_phy *phy = &dev->phy;
        s8 dbm = 0;
        s32 tmp;

        tmp = phy->idle_tssi;
        tmp += tssi;
        tmp -= phy->savedpctlreg;

        switch (phy->type) {
        case B43legacy_PHYTYPE_B:
        case B43legacy_PHYTYPE_G:
                tmp = clamp_val(tmp, 0x00, 0x3F);
                dbm = phy->tssi2dbm[tmp];
                break;
        default:
                B43legacy_BUG_ON(1);
        }

        return dbm;
}

/* http://bcm-specs.sipsolutions.net/RecalculateTransmissionPower */
void b43legacy_phy_xmitpower(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;
        u16 tmp;
        u16 txpower;
        s8 v0;
        s8 v1;
        s8 v2;
        s8 v3;
        s8 average;
        int max_pwr;
        s16 desired_pwr;
        s16 estimated_pwr;
        s16 pwr_adjust;
        s16 radio_att_delta;
        s16 baseband_att_delta;
        s16 radio_attenuation;
        s16 baseband_attenuation;

        if (phy->savedpctlreg == 0xFFFF)
                return;
        if ((dev->dev->bus->boardinfo.type == 0x0416) &&
            is_bcm_board_vendor(dev))
                return;
#ifdef CONFIG_B43LEGACY_DEBUG
        if (phy->manual_txpower_control)
                return;
#endif

        B43legacy_BUG_ON(!(phy->type == B43legacy_PHYTYPE_B ||
                         phy->type == B43legacy_PHYTYPE_G));
        tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 0x0058);
        v0 = (s8)(tmp & 0x00FF);
        v1 = (s8)((tmp & 0xFF00) >> 8);
        tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 0x005A);
        v2 = (s8)(tmp & 0x00FF);
        v3 = (s8)((tmp & 0xFF00) >> 8);
        tmp = 0;

        if (v0 == 0x7F || v1 == 0x7F || v2 == 0x7F || v3 == 0x7F) {
                tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
                                         0x0070);
                v0 = (s8)(tmp & 0x00FF);
                v1 = (s8)((tmp & 0xFF00) >> 8);
                tmp = b43legacy_shm_read16(dev, B43legacy_SHM_SHARED,
                                         0x0072);
                v2 = (s8)(tmp & 0x00FF);
                v3 = (s8)((tmp & 0xFF00) >> 8);
                if (v0 == 0x7F || v1 == 0x7F || v2 == 0x7F || v3 == 0x7F)
                        return;
                v0 = (v0 + 0x20) & 0x3F;
                v1 = (v1 + 0x20) & 0x3F;
                v2 = (v2 + 0x20) & 0x3F;
                v3 = (v3 + 0x20) & 0x3F;
                tmp = 1;
        }
        b43legacy_radio_clear_tssi(dev);

        average = (v0 + v1 + v2 + v3 + 2) / 4;

        if (tmp && (b43legacy_shm_read16(dev, B43legacy_SHM_SHARED, 0x005E)
            & 0x8))
                average -= 13;

        estimated_pwr = b43legacy_phy_estimate_power_out(dev, average);

        max_pwr = dev->dev->bus->sprom.maxpwr_bg;

        if ((dev->dev->bus->sprom.boardflags_lo
             & B43legacy_BFL_PACTRL) &&
            (phy->type == B43legacy_PHYTYPE_G))
                max_pwr -= 0x3;
        if (unlikely(max_pwr <= 0)) {
                b43legacywarn(dev->wl, "Invalid max-TX-power value in SPROM."
                        "\n");
                max_pwr = 74; /* fake it */
                dev->dev->bus->sprom.maxpwr_bg = max_pwr;
        }

        /* Use regulatory information to get the maximum power.
         * In the absence of such data from mac80211, we will use 20 dBm, which
         * is the value for the EU, US, Canada, and most of the world.
         * The regulatory maximum is reduced by the antenna gain (from sprom)
         * and 1.5 dBm (a safety factor??). The result is in Q5.2 format
         * which accounts for the factor of 4 */
#define REG_MAX_PWR 20
        max_pwr = min(REG_MAX_PWR * 4
                      - dev->dev->bus->sprom.antenna_gain.a0
                      - 0x6, max_pwr);

        /* find the desired power in Q5.2 - power_level is in dBm
         * and limit it - max_pwr is already in Q5.2 */
        desired_pwr = clamp_val(phy->power_level << 2, 0, max_pwr);
        if (b43legacy_debug(dev, B43legacy_DBG_XMITPOWER))
                b43legacydbg(dev->wl, "Current TX power output: " Q52_FMT
                       " dBm, Desired TX power output: " Q52_FMT
                       " dBm\n", Q52_ARG(estimated_pwr),
                       Q52_ARG(desired_pwr));
        /* Check if we need to adjust the current power. The factor of 2 is
         * for damping */
        pwr_adjust = (desired_pwr - estimated_pwr) / 2;
        /* RF attenuation delta
         * The minus sign is because lower attenuation => more power */
        radio_att_delta = -(pwr_adjust + 7) >> 3;
        /* Baseband attenuation delta */
        baseband_att_delta = -(pwr_adjust >> 1) - (4 * radio_att_delta);
        /* Do we need to adjust anything? */
        if ((radio_att_delta == 0) && (baseband_att_delta == 0)) {
                b43legacy_phy_lo_mark_current_used(dev);
                return;
        }

        /* Calculate the new attenuation values. */
        baseband_attenuation = phy->bbatt;
        baseband_attenuation += baseband_att_delta;
        radio_attenuation = phy->rfatt;
        radio_attenuation += radio_att_delta;

        /* Get baseband and radio attenuation values into permitted ranges.
         * baseband 0-11, radio 0-9.
         * Radio attenuation affects power level 4 times as much as baseband.
         */
        if (radio_attenuation < 0) {
                baseband_attenuation -= (4 * -radio_attenuation);
                radio_attenuation = 0;
        } else if (radio_attenuation > 9) {
                baseband_attenuation += (4 * (radio_attenuation - 9));
                radio_attenuation = 9;
        } else {
                while (baseband_attenuation < 0 && radio_attenuation > 0) {
                        baseband_attenuation += 4;
                        radio_attenuation--;
                }
                while (baseband_attenuation > 11 && radio_attenuation < 9) {
                        baseband_attenuation -= 4;
                        radio_attenuation++;
                }
        }
        baseband_attenuation = clamp_val(baseband_attenuation, 0, 11);

        txpower = phy->txctl1;
        if ((phy->radio_ver == 0x2050) && (phy->radio_rev == 2)) {
                if (radio_attenuation <= 1) {
                        if (txpower == 0) {
                                txpower = 3;
                                radio_attenuation += 2;
                                baseband_attenuation += 2;
                        } else if (dev->dev->bus->sprom.boardflags_lo
                                   & B43legacy_BFL_PACTRL) {
                                baseband_attenuation += 4 *
                                                     (radio_attenuation - 2);
                                radio_attenuation = 2;
                        }
                } else if (radio_attenuation > 4 && txpower != 0) {
                        txpower = 0;
                        if (baseband_attenuation < 3) {
                                radio_attenuation -= 3;
                                baseband_attenuation += 2;
                        } else {
                                radio_attenuation -= 2;
                                baseband_attenuation -= 2;
                        }
                }
        }
        /* Save the control values */
        phy->txctl1 = txpower;
        baseband_attenuation = clamp_val(baseband_attenuation, 0, 11);
        radio_attenuation = clamp_val(radio_attenuation, 0, 9);
        phy->rfatt = radio_attenuation;
        phy->bbatt = baseband_attenuation;

        /* Adjust the hardware */
        b43legacy_phy_lock(dev);
        b43legacy_radio_lock(dev);
        b43legacy_radio_set_txpower_bg(dev, baseband_attenuation,
                                       radio_attenuation, txpower);
        b43legacy_phy_lo_mark_current_used(dev);
        b43legacy_radio_unlock(dev);
        b43legacy_phy_unlock(dev);
}

static inline
s32 b43legacy_tssi2dbm_ad(s32 num, s32 den)
{
        if (num < 0)
                return num/den;
        else
                return (num+den/2)/den;
}

static inline
s8 b43legacy_tssi2dbm_entry(s8 entry [], u8 index, s16 pab0, s16 pab1, s16 pab2)
{
        s32 m1;
        s32 m2;
        s32 f = 256;
        s32 q;
        s32 delta;
        s8 i = 0;

        m1 = b43legacy_tssi2dbm_ad(16 * pab0 + index * pab1, 32);
        m2 = max(b43legacy_tssi2dbm_ad(32768 + index * pab2, 256), 1);
        do {
                if (i > 15)
                        return -EINVAL;
                q = b43legacy_tssi2dbm_ad(f * 4096 -
                                          b43legacy_tssi2dbm_ad(m2 * f, 16) *
                                          f, 2048);
                delta = abs(q - f);
                f = q;
                i++;
        } while (delta >= 2);
        entry[index] = clamp_val(b43legacy_tssi2dbm_ad(m1 * f, 8192),
                                   -127, 128);
        return 0;
}

/* http://bcm-specs.sipsolutions.net/TSSI_to_DBM_Table */
int b43legacy_phy_init_tssi2dbm_table(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;
        s16 pab0;
        s16 pab1;
        s16 pab2;
        u8 idx;

        s8 *dyn_tssi2dbm;

        B43legacy_WARN_ON(!(phy->type == B43legacy_PHYTYPE_B ||
                          phy->type == B43legacy_PHYTYPE_G));
        pab0 = (s16)(dev->dev->bus->sprom.pa0b0);
        pab1 = (s16)(dev->dev->bus->sprom.pa0b1);
        pab2 = (s16)(dev->dev->bus->sprom.pa0b2);

        if ((dev->dev->bus->chip_id == 0x4301) && (phy->radio_ver != 0x2050)) {
                phy->idle_tssi = 0x34;
                phy->tssi2dbm = b43legacy_tssi2dbm_b_table;
                return 0;
        }

        if (pab0 != 0 && pab1 != 0 && pab2 != 0 &&
            pab0 != -1 && pab1 != -1 && pab2 != -1) {
                /* The pabX values are set in SPROM. Use them. */
                if ((s8)dev->dev->bus->sprom.itssi_bg != 0 &&
                    (s8)dev->dev->bus->sprom.itssi_bg != -1)
                        phy->idle_tssi = (s8)(dev->dev->bus->sprom.
                                          itssi_bg);
                else
                        phy->idle_tssi = 62;
                dyn_tssi2dbm = kmalloc(64, GFP_KERNEL);
                if (dyn_tssi2dbm == NULL) {
                        b43legacyerr(dev->wl, "Could not allocate memory "
                               "for tssi2dbm table\n");
                        return -ENOMEM;
                }
                for (idx = 0; idx < 64; idx++)
                        if (b43legacy_tssi2dbm_entry(dyn_tssi2dbm, idx, pab0,
                                                     pab1, pab2)) {
                                phy->tssi2dbm = NULL;
                                b43legacyerr(dev->wl, "Could not generate "
                                       "tssi2dBm table\n");
                                kfree(dyn_tssi2dbm);
                                return -ENODEV;
                        }
                phy->tssi2dbm = dyn_tssi2dbm;
                phy->dyn_tssi_tbl = 1;
        } else {
                /* pabX values not set in SPROM. */
                switch (phy->type) {
                case B43legacy_PHYTYPE_B:
                        phy->idle_tssi = 0x34;
                        phy->tssi2dbm = b43legacy_tssi2dbm_b_table;
                        break;
                case B43legacy_PHYTYPE_G:
                        phy->idle_tssi = 0x34;
                        phy->tssi2dbm = b43legacy_tssi2dbm_g_table;
                        break;
                }
        }

        return 0;
}

int b43legacy_phy_init(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;
        int err = -ENODEV;

        switch (phy->type) {
        case B43legacy_PHYTYPE_B:
                switch (phy->rev) {
                case 2:
                        b43legacy_phy_initb2(dev);
                        err = 0;
                        break;
                case 4:
                        b43legacy_phy_initb4(dev);
                        err = 0;
                        break;
                case 5:
                        b43legacy_phy_initb5(dev);
                        err = 0;
                        break;
                case 6:
                        b43legacy_phy_initb6(dev);
                        err = 0;
                        break;
                }
                break;
        case B43legacy_PHYTYPE_G:
                b43legacy_phy_initg(dev);
                err = 0;
                break;
        }
        if (err)
                b43legacyerr(dev->wl, "Unknown PHYTYPE found\n");

        return err;
}

void b43legacy_phy_set_antenna_diversity(struct b43legacy_wldev *dev)
{
        struct b43legacy_phy *phy = &dev->phy;
        u16 antennadiv;
        u16 offset;
        u16 value;
        u32 ucodeflags;

        antennadiv = phy->antenna_diversity;

        if (antennadiv == 0xFFFF)
                antennadiv = 3;
        B43legacy_WARN_ON(antennadiv > 3);

        ucodeflags = b43legacy_shm_read32(dev, B43legacy_SHM_SHARED,
                                          B43legacy_UCODEFLAGS_OFFSET);
        b43legacy_shm_write32(dev, B43legacy_SHM_SHARED,
                              B43legacy_UCODEFLAGS_OFFSET,
                              ucodeflags & ~B43legacy_UCODEFLAG_AUTODIV);

        switch (phy->type) {
        case B43legacy_PHYTYPE_G:
                offset = 0x0400;

                if (antennadiv == 2)
                        value = (3/*automatic*/ << 7);
                else
                        value = (antennadiv << 7);
                b43legacy_phy_write(dev, offset + 1,
                                    (b43legacy_phy_read(dev, offset + 1)
                                    & 0x7E7F) | value);

                if (antennadiv >= 2) {
                        if (antennadiv == 2)
                                value = (antennadiv << 7);
                        else
                                value = (0/*force0*/ << 7);
                        b43legacy_phy_write(dev, offset + 0x2B,
                                            (b43legacy_phy_read(dev,
                                            offset + 0x2B)
                                            & 0xFEFF) | value);
                }

                if (phy->type == B43legacy_PHYTYPE_G) {
                        if (antennadiv >= 2)
                                b43legacy_phy_write(dev, 0x048C,
                                                    b43legacy_phy_read(dev,
                                                    0x048C) | 0x2000);
                        else
                                b43legacy_phy_write(dev, 0x048C,
                                                    b43legacy_phy_read(dev,
                                                    0x048C) & ~0x2000);
                        if (phy->rev >= 2) {
                                b43legacy_phy_write(dev, 0x0461,
                                                    b43legacy_phy_read(dev,
                                                    0x0461) | 0x0010);
                                b43legacy_phy_write(dev, 0x04AD,
                                                    (b43legacy_phy_read(dev,
                                                    0x04AD)
                                                    & 0x00FF) | 0x0015);
                                if (phy->rev == 2)
                                        b43legacy_phy_write(dev, 0x0427,
                                                            0x0008);
                                else
                                        b43legacy_phy_write(dev, 0x0427,
                                                (b43legacy_phy_read(dev, 0x0427)
                                                 & 0x00FF) | 0x0008);
                        } else if (phy->rev >= 6)
                                b43legacy_phy_write(dev, 0x049B, 0x00DC);
                } else {
                        if (phy->rev < 3)
                                b43legacy_phy_write(dev, 0x002B,
                                                    (b43legacy_phy_read(dev,
                                                    0x002B) & 0x00FF)
                                                    | 0x0024);
                        else {
                                b43legacy_phy_write(dev, 0x0061,
                                                    b43legacy_phy_read(dev,
                                                    0x0061) | 0x0010);
                                if (phy->rev == 3) {
                                        b43legacy_phy_write(dev, 0x0093,
                                                            0x001D);
                                        b43legacy_phy_write(dev, 0x0027,
                                                            0x0008);
                                } else {
                                        b43legacy_phy_write(dev, 0x0093,
                                                            0x003A);
                                        b43legacy_phy_write(dev, 0x0027,
                                                (b43legacy_phy_read(dev, 0x0027)
                                                 & 0x00FF) | 0x0008);
                                }
                        }
                }
                break;
        case B43legacy_PHYTYPE_B:
                if (dev->dev->id.revision == 2)
                        value = (3/*automatic*/ << 7);
                else
                        value = (antennadiv << 7);
                b43legacy_phy_write(dev, 0x03E2,
                                    (b43legacy_phy_read(dev, 0x03E2)
                                    & 0xFE7F) | value);
                break;
        default:
                B43legacy_WARN_ON(1);
        }

        if (antennadiv >= 2) {
                ucodeflags = b43legacy_shm_read32(dev, B43legacy_SHM_SHARED,
                                                  B43legacy_UCODEFLAGS_OFFSET);
                b43legacy_shm_write32(dev, B43legacy_SHM_SHARED,
                                      B43legacy_UCODEFLAGS_OFFSET,
                                      ucodeflags | B43legacy_UCODEFLAG_AUTODIV);
        }

        phy->antenna_diversity = antennadiv;
}

/* Set the PowerSavingControlBits.
 * Bitvalues:
 *   0  => unset the bit
 *   1  => set the bit
 *   -1 => calculate the bit
 */
void b43legacy_power_saving_ctl_bits(struct b43legacy_wldev *dev,
                                     int bit25, int bit26)
{
        int i;
        u32 status;

/* FIXME: Force 25 to off and 26 to on for now: */
bit25 = 0;
bit26 = 1;

        if (bit25 == -1) {
                /* TODO: If powersave is not off and FIXME is not set and we
                 *      are not in adhoc and thus is not an AP and we arei
                 *      associated, set bit 25 */
        }
        if (bit26 == -1) {
                /* TODO: If the device is awake or this is an AP, or we are
                 *      scanning, or FIXME, or we are associated, or FIXME,
                 *      or the latest PS-Poll packet sent was successful,
                 *      set bit26  */
        }
        status = b43legacy_read32(dev, B43legacy_MMIO_MACCTL);
        if (bit25)
                status |= B43legacy_MACCTL_HWPS;
        else
                status &= ~B43legacy_MACCTL_HWPS;
        if (bit26)
                status |= B43legacy_MACCTL_AWAKE;
        else
                status &= ~B43legacy_MACCTL_AWAKE;
        b43legacy_write32(dev, B43legacy_MMIO_MACCTL, status);
        if (bit26 && dev->dev->id.revision >= 5) {
                for (i = 0; i < 100; i++) {
                        if (b43legacy_shm_read32(dev, B43legacy_SHM_SHARED,
                                                 0x0040) != 4)
                                break;
                        udelay(10);
                }
        }
}