drivers/net/wireless/b43/phy_common.c - kernel/msm-4.9 - Gitiles

 /*

   Broadcom B43 wireless driver
   Common PHY routines

   Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
   Copyright (c) 2005-2007 Stefano Brivio <stefano.brivio@polimi.it>
   Copyright (c) 2005-2008 Michael Buesch <m@bues.ch>
   Copyright (c) 2005, 2006 Danny van Dyk <kugelfang@gentoo.org>
   Copyright (c) 2005, 2006 Andreas Jaggi <andreas.jaggi@waterwave.ch>

   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 "phy_common.h"
 #include "phy_g.h"
 #include "phy_a.h"
 #include "phy_n.h"
 #include "phy_lp.h"
 #include "phy_ht.h"
 #include "phy_lcn.h"
 #include "phy_ac.h"
 #include "b43.h"
 #include "main.h"


 int b43_phy_allocate(struct b43_wldev *dev)
 {
 	struct b43_phy *phy = &(dev->phy);
 	int err;

 	phy->ops = NULL;

 	switch (phy->type) {
 	case B43_PHYTYPE_G:
 #ifdef CONFIG_B43_PHY_G
 		phy->ops = &b43_phyops_g;
 #endif
 		break;
 	case B43_PHYTYPE_N:
 #ifdef CONFIG_B43_PHY_N
 		phy->ops = &b43_phyops_n;
 #endif
 		break;
 	case B43_PHYTYPE_LP:
 #ifdef CONFIG_B43_PHY_LP
 		phy->ops = &b43_phyops_lp;
 #endif
 		break;
 	case B43_PHYTYPE_HT:
 #ifdef CONFIG_B43_PHY_HT
 		phy->ops = &b43_phyops_ht;
 #endif
 		break;
 	case B43_PHYTYPE_LCN:
 #ifdef CONFIG_B43_PHY_LCN
 		phy->ops = &b43_phyops_lcn;
 #endif
 		break;
 	case B43_PHYTYPE_AC:
 #ifdef CONFIG_B43_PHY_AC
 		phy->ops = &b43_phyops_ac;
 #endif
 		break;
 	}
 	if (B43_WARN_ON(!phy->ops))
 		return -ENODEV;

 	err = phy->ops->allocate(dev);
 	if (err)
 		phy->ops = NULL;

 	return err;
 }

 void b43_phy_free(struct b43_wldev *dev)
 {
 	dev->phy.ops->free(dev);
 	dev->phy.ops = NULL;
 }

 int b43_phy_init(struct b43_wldev *dev)
 {
 	struct b43_phy *phy = &dev->phy;
 	const struct b43_phy_operations *ops = phy->ops;
 	int err;

 	/* During PHY init we need to use some channel. On the first init this
 	 * function is called *before* b43_op_config, so our pointer is NULL.
 	 */
 	if (!phy->chandef) {
 		phy->chandef = &dev->wl->hw->conf.chandef;
 		phy->channel = phy->chandef->chan->hw_value;
 	}

 	phy->ops->switch_analog(dev, true);
 	b43_software_rfkill(dev, false);

 	err = ops->init(dev);
 	if (err) {
 		b43err(dev->wl, "PHY init failed\n");
 		goto err_block_rf;
 	}
 	phy->do_full_init = false;

 	err = b43_switch_channel(dev, phy->channel);
 	if (err) {
 		b43err(dev->wl, "PHY init: Channel switch to default failed\n");
 		goto err_phy_exit;
 	}

 	return 0;

 err_phy_exit:
 	phy->do_full_init = true;
 	if (ops->exit)
 		ops->exit(dev);
 err_block_rf:
 	b43_software_rfkill(dev, true);

 	return err;
 }

 void b43_phy_exit(struct b43_wldev *dev)
 {
 	const struct b43_phy_operations *ops = dev->phy.ops;

 	b43_software_rfkill(dev, true);
 	dev->phy.do_full_init = true;
 	if (ops->exit)
 		ops->exit(dev);
 }

 bool b43_has_hardware_pctl(struct b43_wldev *dev)
 {
 	if (!dev->phy.hardware_power_control)
 		return false;
 	if (!dev->phy.ops->supports_hwpctl)
 		return false;
 	return dev->phy.ops->supports_hwpctl(dev);
 }

 void b43_radio_lock(struct b43_wldev *dev)
 {
 	u32 macctl;

 #if B43_DEBUG
 	B43_WARN_ON(dev->phy.radio_locked);
 	dev->phy.radio_locked = true;
 #endif

 	macctl = b43_read32(dev, B43_MMIO_MACCTL);
 	macctl |= B43_MACCTL_RADIOLOCK;
 	b43_write32(dev, B43_MMIO_MACCTL, macctl);
 	/* Commit the write and wait for the firmware
 	 * to finish any radio register access. */
 	b43_read32(dev, B43_MMIO_MACCTL);
 	udelay(10);
 }

 void b43_radio_unlock(struct b43_wldev *dev)
 {
 	u32 macctl;

 #if B43_DEBUG
 	B43_WARN_ON(!dev->phy.radio_locked);
 	dev->phy.radio_locked = false;
 #endif

 	/* Commit any write */
 	b43_read16(dev, B43_MMIO_PHY_VER);
 	/* unlock */
 	macctl = b43_read32(dev, B43_MMIO_MACCTL);
 	macctl &= ~B43_MACCTL_RADIOLOCK;
 	b43_write32(dev, B43_MMIO_MACCTL, macctl);
 }

 void b43_phy_lock(struct b43_wldev *dev)
 {
 #if B43_DEBUG
 	B43_WARN_ON(dev->phy.phy_locked);
 	dev->phy.phy_locked = true;
 #endif
 	B43_WARN_ON(dev->dev->core_rev < 3);

 	if (!b43_is_mode(dev->wl, NL80211_IFTYPE_AP))
 		b43_power_saving_ctl_bits(dev, B43_PS_AWAKE);
 }

 void b43_phy_unlock(struct b43_wldev *dev)
 {
 #if B43_DEBUG
 	B43_WARN_ON(!dev->phy.phy_locked);
 	dev->phy.phy_locked = false;
 #endif
 	B43_WARN_ON(dev->dev->core_rev < 3);

 	if (!b43_is_mode(dev->wl, NL80211_IFTYPE_AP))
 		b43_power_saving_ctl_bits(dev, 0);
 }

 static inline void assert_mac_suspended(struct b43_wldev *dev)
 {
 	if (!B43_DEBUG)
 		return;
 	if ((b43_status(dev) >= B43_STAT_INITIALIZED) &&
 	    (dev->mac_suspended <= 0)) {
 		b43dbg(dev->wl, "PHY/RADIO register access with "
 		       "enabled MAC.\n");
 		dump_stack();
 	}
 }

 u16 b43_radio_read(struct b43_wldev *dev, u16 reg)
 {
 	assert_mac_suspended(dev);
 	dev->phy.writes_counter = 0;
 	return dev->phy.ops->radio_read(dev, reg);
 }

 void b43_radio_write(struct b43_wldev *dev, u16 reg, u16 value)
 {
 	assert_mac_suspended(dev);
 	if (b43_bus_host_is_pci(dev->dev) &&
 	    ++dev->phy.writes_counter > B43_MAX_WRITES_IN_ROW) {
 		b43_read32(dev, B43_MMIO_MACCTL);
 		dev->phy.writes_counter = 1;
 	}
 	dev->phy.ops->radio_write(dev, reg, value);
 }

 void b43_radio_mask(struct b43_wldev *dev, u16 offset, u16 mask)
 {
 	b43_radio_write16(dev, offset,
 			  b43_radio_read16(dev, offset) & mask);
 }

 void b43_radio_set(struct b43_wldev *dev, u16 offset, u16 set)
 {
 	b43_radio_write16(dev, offset,
 			  b43_radio_read16(dev, offset) | set);
 }

 void b43_radio_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set)
 {
 	b43_radio_write16(dev, offset,
 			  (b43_radio_read16(dev, offset) & mask) | set);
 }

 bool b43_radio_wait_value(struct b43_wldev *dev, u16 offset, u16 mask,
 			  u16 value, int delay, int timeout)
 {
 	u16 val;
 	int i;

 	for (i = 0; i < timeout; i += delay) {
 		val = b43_radio_read(dev, offset);
 		if ((val & mask) == value)
 			return true;
 		udelay(delay);
 	}
 	return false;
 }

 u16 b43_phy_read(struct b43_wldev *dev, u16 reg)
 {
 	assert_mac_suspended(dev);
 	dev->phy.writes_counter = 0;

 	if (dev->phy.ops->phy_read)
 		return dev->phy.ops->phy_read(dev, reg);

 	b43_write16f(dev, B43_MMIO_PHY_CONTROL, reg);
 	return b43_read16(dev, B43_MMIO_PHY_DATA);
 }

 void b43_phy_write(struct b43_wldev *dev, u16 reg, u16 value)
 {
 	assert_mac_suspended(dev);
 	if (b43_bus_host_is_pci(dev->dev) &&
 	    ++dev->phy.writes_counter > B43_MAX_WRITES_IN_ROW) {
 		b43_read16(dev, B43_MMIO_PHY_VER);
 		dev->phy.writes_counter = 1;
 	}

 	if (dev->phy.ops->phy_write)
 		return dev->phy.ops->phy_write(dev, reg, value);

 	b43_write16f(dev, B43_MMIO_PHY_CONTROL, reg);
 	b43_write16(dev, B43_MMIO_PHY_DATA, value);
 }

 void b43_phy_copy(struct b43_wldev *dev, u16 destreg, u16 srcreg)
 {
 	b43_phy_write(dev, destreg, b43_phy_read(dev, srcreg));
 }

 void b43_phy_mask(struct b43_wldev *dev, u16 offset, u16 mask)
 {
 	if (dev->phy.ops->phy_maskset) {
 		assert_mac_suspended(dev);
 		dev->phy.ops->phy_maskset(dev, offset, mask, 0);
 	} else {
 		b43_phy_write(dev, offset,
 			      b43_phy_read(dev, offset) & mask);
 	}
 }

 void b43_phy_set(struct b43_wldev *dev, u16 offset, u16 set)
 {
 	if (dev->phy.ops->phy_maskset) {
 		assert_mac_suspended(dev);
 		dev->phy.ops->phy_maskset(dev, offset, 0xFFFF, set);
 	} else {
 		b43_phy_write(dev, offset,
 			      b43_phy_read(dev, offset) | set);
 	}
 }

 void b43_phy_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set)
 {
 	if (dev->phy.ops->phy_maskset) {
 		assert_mac_suspended(dev);
 		dev->phy.ops->phy_maskset(dev, offset, mask, set);
 	} else {
 		b43_phy_write(dev, offset,
 			      (b43_phy_read(dev, offset) & mask) | set);
 	}
 }

 void b43_phy_put_into_reset(struct b43_wldev *dev)
 {
 	u32 tmp;

 	switch (dev->dev->bus_type) {
 #ifdef CONFIG_B43_BCMA
 	case B43_BUS_BCMA:
 		tmp = bcma_aread32(dev->dev->bdev, BCMA_IOCTL);
 		tmp &= ~B43_BCMA_IOCTL_GMODE;
 		tmp |= B43_BCMA_IOCTL_PHY_RESET;
 		tmp |= BCMA_IOCTL_FGC;
 		bcma_awrite32(dev->dev->bdev, BCMA_IOCTL, tmp);
 		udelay(1);

 		tmp = bcma_aread32(dev->dev->bdev, BCMA_IOCTL);
 		tmp &= ~BCMA_IOCTL_FGC;
 		bcma_awrite32(dev->dev->bdev, BCMA_IOCTL, tmp);
 		udelay(1);
 		break;
 #endif
 #ifdef CONFIG_B43_SSB
 	case B43_BUS_SSB:
 		tmp = ssb_read32(dev->dev->sdev, SSB_TMSLOW);
 		tmp &= ~B43_TMSLOW_GMODE;
 		tmp |= B43_TMSLOW_PHYRESET;
 		tmp |= SSB_TMSLOW_FGC;
 		ssb_write32(dev->dev->sdev, SSB_TMSLOW, tmp);
 		usleep_range(1000, 2000);

 		tmp = ssb_read32(dev->dev->sdev, SSB_TMSLOW);
 		tmp &= ~SSB_TMSLOW_FGC;
 		ssb_write32(dev->dev->sdev, SSB_TMSLOW, tmp);
 		usleep_range(1000, 2000);

 		break;
 #endif
 	}
 }

 void b43_phy_take_out_of_reset(struct b43_wldev *dev)
 {
 	u32 tmp;

 	switch (dev->dev->bus_type) {
 #ifdef CONFIG_B43_BCMA
 	case B43_BUS_BCMA:
 		/* Unset reset bit (with forcing clock) */
 		tmp = bcma_aread32(dev->dev->bdev, BCMA_IOCTL);
 		tmp &= ~B43_BCMA_IOCTL_PHY_RESET;
 		tmp &= ~B43_BCMA_IOCTL_PHY_CLKEN;
 		tmp |= BCMA_IOCTL_FGC;
 		bcma_awrite32(dev->dev->bdev, BCMA_IOCTL, tmp);
 		udelay(1);

 		/* Do not force clock anymore */
 		tmp = bcma_aread32(dev->dev->bdev, BCMA_IOCTL);
 		tmp &= ~BCMA_IOCTL_FGC;
 		tmp |= B43_BCMA_IOCTL_PHY_CLKEN;
 		bcma_awrite32(dev->dev->bdev, BCMA_IOCTL, tmp);
 		udelay(1);
 		break;
 #endif
 #ifdef CONFIG_B43_SSB
 	case B43_BUS_SSB:
 		/* Unset reset bit (with forcing clock) */
 		tmp = ssb_read32(dev->dev->sdev, SSB_TMSLOW);
 		tmp &= ~B43_TMSLOW_PHYRESET;
 		tmp &= ~B43_TMSLOW_PHYCLKEN;
 		tmp |= SSB_TMSLOW_FGC;
 		ssb_write32(dev->dev->sdev, SSB_TMSLOW, tmp);
 		ssb_read32(dev->dev->sdev, SSB_TMSLOW); /* flush */
 		usleep_range(1000, 2000);

 		tmp = ssb_read32(dev->dev->sdev, SSB_TMSLOW);
 		tmp &= ~SSB_TMSLOW_FGC;
 		tmp |= B43_TMSLOW_PHYCLKEN;
 		ssb_write32(dev->dev->sdev, SSB_TMSLOW, tmp);
 		ssb_read32(dev->dev->sdev, SSB_TMSLOW); /* flush */
 		usleep_range(1000, 2000);
 		break;
 #endif
 	}
 }

 int b43_switch_channel(struct b43_wldev *dev, unsigned int new_channel)
 {
 	struct b43_phy *phy = &(dev->phy);
 	u16 channelcookie, savedcookie;
 	int err;

 	/* First we set the channel radio code to prevent the
 	 * firmware from sending ghost packets.
 	 */
 	channelcookie = new_channel;
 	if (b43_current_band(dev->wl) == IEEE80211_BAND_5GHZ)
 		channelcookie |= B43_SHM_SH_CHAN_5GHZ;
 	/* FIXME: set 40Mhz flag if required */
 	if (0)
 		channelcookie |= B43_SHM_SH_CHAN_40MHZ;
 	savedcookie = b43_shm_read16(dev, B43_SHM_SHARED, B43_SHM_SH_CHAN);
 	b43_shm_write16(dev, B43_SHM_SHARED, B43_SHM_SH_CHAN, channelcookie);

 	/* Now try to switch the PHY hardware channel. */
 	err = phy->ops->switch_channel(dev, new_channel);
 	if (err)
 		goto err_restore_cookie;

 	/* Wait for the radio to tune to the channel and stabilize. */
 	msleep(8);

 	return 0;

 err_restore_cookie:
 	b43_shm_write16(dev, B43_SHM_SHARED,
 			B43_SHM_SH_CHAN, savedcookie);

 	return err;
 }

 void b43_software_rfkill(struct b43_wldev *dev, bool blocked)
 {
 	struct b43_phy *phy = &dev->phy;

 	b43_mac_suspend(dev);
 	phy->ops->software_rfkill(dev, blocked);
 	phy->radio_on = !blocked;
 	b43_mac_enable(dev);
 }

 /**
  * b43_phy_txpower_adjust_work - TX power workqueue.
  *
  * Workqueue for updating the TX power parameters in hardware.
  */
 void b43_phy_txpower_adjust_work(struct work_struct *work)
 {
 	struct b43_wl *wl = container_of(work, struct b43_wl,
 					 txpower_adjust_work);
 	struct b43_wldev *dev;

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

 	if (likely(dev && (b43_status(dev) >= B43_STAT_STARTED)))
 		dev->phy.ops->adjust_txpower(dev);

 	mutex_unlock(&wl->mutex);
 }

 void b43_phy_txpower_check(struct b43_wldev *dev, unsigned int flags)
 {
 	struct b43_phy *phy = &dev->phy;
 	unsigned long now = jiffies;
 	enum b43_txpwr_result result;

 	if (!(flags & B43_TXPWR_IGNORE_TIME)) {
 		/* Check if it's time for a TXpower check. */
 		if (time_before(now, phy->next_txpwr_check_time))
 			return; /* Not yet */
 	}
 	/* The next check will be needed in two seconds, or later. */
 	phy->next_txpwr_check_time = round_jiffies(now + (HZ * 2));

 	if ((dev->dev->board_vendor == SSB_BOARDVENDOR_BCM) &&
 	    (dev->dev->board_type == SSB_BOARD_BU4306))
 		return; /* No software txpower adjustment needed */

 	result = phy->ops->recalc_txpower(dev, !!(flags & B43_TXPWR_IGNORE_TSSI));
 	if (result == B43_TXPWR_RES_DONE)
 		return; /* We are done. */
 	B43_WARN_ON(result != B43_TXPWR_RES_NEED_ADJUST);
 	B43_WARN_ON(phy->ops->adjust_txpower == NULL);

 	/* We must adjust the transmission power in hardware.
 	 * Schedule b43_phy_txpower_adjust_work(). */
 	ieee80211_queue_work(dev->wl->hw, &dev->wl->txpower_adjust_work);
 }

 int b43_phy_shm_tssi_read(struct b43_wldev *dev, u16 shm_offset)
 {
 	const bool is_ofdm = (shm_offset != B43_SHM_SH_TSSI_CCK);
 	unsigned int a, b, c, d;
 	unsigned int average;
 	u32 tmp;

 	tmp = b43_shm_read32(dev, B43_SHM_SHARED, shm_offset);
 	a = tmp & 0xFF;
 	b = (tmp >> 8) & 0xFF;
 	c = (tmp >> 16) & 0xFF;
 	d = (tmp >> 24) & 0xFF;
 	if (a == 0 || a == B43_TSSI_MAX ||
 	    b == 0 || b == B43_TSSI_MAX ||
 	    c == 0 || c == B43_TSSI_MAX ||
 	    d == 0 || d == B43_TSSI_MAX)
 		return -ENOENT;
 	/* The values are OK. Clear them. */
 	tmp = B43_TSSI_MAX | (B43_TSSI_MAX << 8) |
 	      (B43_TSSI_MAX << 16) | (B43_TSSI_MAX << 24);
 	b43_shm_write32(dev, B43_SHM_SHARED, shm_offset, tmp);

 	if (is_ofdm) {
 		a = (a + 32) & 0x3F;
 		b = (b + 32) & 0x3F;
 		c = (c + 32) & 0x3F;
 		d = (d + 32) & 0x3F;
 	}

 	/* Get the average of the values with 0.5 added to each value. */
 	average = (a + b + c + d + 2) / 4;
 	if (is_ofdm) {
 		/* Adjust for CCK-boost */
 		if (b43_shm_read16(dev, B43_SHM_SHARED, B43_SHM_SH_HOSTF1)
 		    & B43_HF_CCKBOOST)
 			average = (average >= 13) ? (average - 13) : 0;
 	}

 	return average;
 }

 void b43_phyop_switch_analog_generic(struct b43_wldev *dev, bool on)
 {
 	b43_write16(dev, B43_MMIO_PHY0, on ? 0 : 0xF4);
 }


 bool b43_is_40mhz(struct b43_wldev *dev)
 {
 	return dev->phy.chandef->width == NL80211_CHAN_WIDTH_40;
 }

 /* http://bcm-v4.sipsolutions.net/802.11/PHY/N/BmacPhyClkFgc */
 void b43_phy_force_clock(struct b43_wldev *dev, bool force)
 {
 	u32 tmp;

 	WARN_ON(dev->phy.type != B43_PHYTYPE_N &&
 		dev->phy.type != B43_PHYTYPE_HT &&
 		dev->phy.type != B43_PHYTYPE_AC);

 	switch (dev->dev->bus_type) {
 #ifdef CONFIG_B43_BCMA
 	case B43_BUS_BCMA:
 		tmp = bcma_aread32(dev->dev->bdev, BCMA_IOCTL);
 		if (force)
 			tmp |= BCMA_IOCTL_FGC;
 		else
 			tmp &= ~BCMA_IOCTL_FGC;
 		bcma_awrite32(dev->dev->bdev, BCMA_IOCTL, tmp);
 		break;
 #endif
 #ifdef CONFIG_B43_SSB
 	case B43_BUS_SSB:
 		tmp = ssb_read32(dev->dev->sdev, SSB_TMSLOW);
 		if (force)
 			tmp |= SSB_TMSLOW_FGC;
 		else
 			tmp &= ~SSB_TMSLOW_FGC;
 		ssb_write32(dev->dev->sdev, SSB_TMSLOW, tmp);
 		break;
 #endif
 	}
 }

 /* http://bcm-v4.sipsolutions.net/802.11/PHY/Cordic */
 struct b43_c32 b43_cordic(int theta)
 {
 	static const u32 arctg[] = {
 		2949120, 1740967, 919879, 466945, 234379, 117304,
 		  58666,   29335,  14668,   7334,   3667,   1833,
 		    917,     458,    229,    115,     57,     29,
 	};
 	u8 i;
 	s32 tmp;
 	s8 signx = 1;
 	u32 angle = 0;
 	struct b43_c32 ret = { .i = 39797, .q = 0, };

 	while (theta > (180 << 16))
 		theta -= (360 << 16);
 	while (theta < -(180 << 16))
 		theta += (360 << 16);

 	if (theta > (90 << 16)) {
 		theta -= (180 << 16);
 		signx = -1;
 	} else if (theta < -(90 << 16)) {
 		theta += (180 << 16);
 		signx = -1;
 	}

 	for (i = 0; i <= 17; i++) {
 		if (theta > angle) {
 			tmp = ret.i - (ret.q >> i);
 			ret.q += ret.i >> i;
 			ret.i = tmp;
 			angle += arctg[i];
 		} else {
 			tmp = ret.i + (ret.q >> i);
 			ret.q -= ret.i >> i;
 			ret.i = tmp;
 			angle -= arctg[i];
 		}
 	}

 	ret.i *= signx;
 	ret.q *= signx;

 	return ret;
 }
	/*

	Broadcom B43 wireless driver
	Common PHY routines

	Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
	Copyright (c) 2005-2007 Stefano Brivio <stefano.brivio@polimi.it>
	Copyright (c) 2005-2008 Michael Buesch <m@bues.ch>
	Copyright (c) 2005, 2006 Danny van Dyk <kugelfang@gentoo.org>
	Copyright (c) 2005, 2006 Andreas Jaggi <andreas.jaggi@waterwave.ch>

	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 "phy_common.h"
	#include "phy_g.h"
	#include "phy_a.h"
	#include "phy_n.h"
	#include "phy_lp.h"
	#include "phy_ht.h"
	#include "phy_lcn.h"
	#include "phy_ac.h"
	#include "b43.h"
	#include "main.h"


	int b43_phy_allocate(struct b43_wldev *dev)
	{
	struct b43_phy *phy = &(dev->phy);
	int err;

	phy->ops = NULL;

	switch (phy->type) {
	case B43_PHYTYPE_G:
	#ifdef CONFIG_B43_PHY_G
	phy->ops = &b43_phyops_g;
	#endif
	break;
	case B43_PHYTYPE_N:
	#ifdef CONFIG_B43_PHY_N
	phy->ops = &b43_phyops_n;
	#endif
	break;
	case B43_PHYTYPE_LP:
	#ifdef CONFIG_B43_PHY_LP
	phy->ops = &b43_phyops_lp;
	#endif
	break;
	case B43_PHYTYPE_HT:
	#ifdef CONFIG_B43_PHY_HT
	phy->ops = &b43_phyops_ht;
	#endif
	break;
	case B43_PHYTYPE_LCN:
	#ifdef CONFIG_B43_PHY_LCN
	phy->ops = &b43_phyops_lcn;
	#endif
	break;
	case B43_PHYTYPE_AC:
	#ifdef CONFIG_B43_PHY_AC
	phy->ops = &b43_phyops_ac;
	#endif
	break;
	}
	if (B43_WARN_ON(!phy->ops))
	return -ENODEV;

	err = phy->ops->allocate(dev);
	if (err)
	phy->ops = NULL;

	return err;
	}

	void b43_phy_free(struct b43_wldev *dev)
	{
	dev->phy.ops->free(dev);
	dev->phy.ops = NULL;
	}

	int b43_phy_init(struct b43_wldev *dev)
	{
	struct b43_phy *phy = &dev->phy;
	const struct b43_phy_operations *ops = phy->ops;
	int err;

	/* During PHY init we need to use some channel. On the first init this
	* function is called before b43_op_config, so our pointer is NULL.
	*/
	if (!phy->chandef) {
	phy->chandef = &dev->wl->hw->conf.chandef;
	phy->channel = phy->chandef->chan->hw_value;
	}

	phy->ops->switch_analog(dev, true);
	b43_software_rfkill(dev, false);

	err = ops->init(dev);
	if (err) {
	b43err(dev->wl, "PHY init failed\n");
	goto err_block_rf;
	}
	phy->do_full_init = false;

	err = b43_switch_channel(dev, phy->channel);
	if (err) {
	b43err(dev->wl, "PHY init: Channel switch to default failed\n");
	goto err_phy_exit;
	}

	return 0;

	err_phy_exit:
	phy->do_full_init = true;
	if (ops->exit)
	ops->exit(dev);
	err_block_rf:
	b43_software_rfkill(dev, true);

	return err;
	}

	void b43_phy_exit(struct b43_wldev *dev)
	{
	const struct b43_phy_operations *ops = dev->phy.ops;

	b43_software_rfkill(dev, true);
	dev->phy.do_full_init = true;
	if (ops->exit)
	ops->exit(dev);
	}

	bool b43_has_hardware_pctl(struct b43_wldev *dev)
	{
	if (!dev->phy.hardware_power_control)
	return false;
	if (!dev->phy.ops->supports_hwpctl)
	return false;
	return dev->phy.ops->supports_hwpctl(dev);
	}

	void b43_radio_lock(struct b43_wldev *dev)
	{
	u32 macctl;

	#if B43_DEBUG
	B43_WARN_ON(dev->phy.radio_locked);
	dev->phy.radio_locked = true;
	#endif

	macctl = b43_read32(dev, B43_MMIO_MACCTL);
	macctl \|= B43_MACCTL_RADIOLOCK;
	b43_write32(dev, B43_MMIO_MACCTL, macctl);
	/* Commit the write and wait for the firmware
	* to finish any radio register access. */
	b43_read32(dev, B43_MMIO_MACCTL);
	udelay(10);
	}

	void b43_radio_unlock(struct b43_wldev *dev)
	{
	u32 macctl;

	#if B43_DEBUG
	B43_WARN_ON(!dev->phy.radio_locked);
	dev->phy.radio_locked = false;
	#endif

	/* Commit any write */
	b43_read16(dev, B43_MMIO_PHY_VER);
	/* unlock */
	macctl = b43_read32(dev, B43_MMIO_MACCTL);
	macctl &= ~B43_MACCTL_RADIOLOCK;
	b43_write32(dev, B43_MMIO_MACCTL, macctl);
	}

	void b43_phy_lock(struct b43_wldev *dev)
	{
	#if B43_DEBUG
	B43_WARN_ON(dev->phy.phy_locked);
	dev->phy.phy_locked = true;
	#endif
	B43_WARN_ON(dev->dev->core_rev < 3);

	if (!b43_is_mode(dev->wl, NL80211_IFTYPE_AP))
	b43_power_saving_ctl_bits(dev, B43_PS_AWAKE);
	}

	void b43_phy_unlock(struct b43_wldev *dev)
	{
	#if B43_DEBUG
	B43_WARN_ON(!dev->phy.phy_locked);
	dev->phy.phy_locked = false;
	#endif
	B43_WARN_ON(dev->dev->core_rev < 3);

	if (!b43_is_mode(dev->wl, NL80211_IFTYPE_AP))
	b43_power_saving_ctl_bits(dev, 0);
	}

	static inline void assert_mac_suspended(struct b43_wldev *dev)
	{
	if (!B43_DEBUG)
	return;
	if ((b43_status(dev) >= B43_STAT_INITIALIZED) &&
	(dev->mac_suspended <= 0)) {
	b43dbg(dev->wl, "PHY/RADIO register access with "
	"enabled MAC.\n");
	dump_stack();
	}
	}

	u16 b43_radio_read(struct b43_wldev *dev, u16 reg)
	{
	assert_mac_suspended(dev);
	dev->phy.writes_counter = 0;
	return dev->phy.ops->radio_read(dev, reg);
	}

	void b43_radio_write(struct b43_wldev *dev, u16 reg, u16 value)
	{
	assert_mac_suspended(dev);
	if (b43_bus_host_is_pci(dev->dev) &&
	++dev->phy.writes_counter > B43_MAX_WRITES_IN_ROW) {
	b43_read32(dev, B43_MMIO_MACCTL);
	dev->phy.writes_counter = 1;
	}
	dev->phy.ops->radio_write(dev, reg, value);
	}

	void b43_radio_mask(struct b43_wldev *dev, u16 offset, u16 mask)
	{
	b43_radio_write16(dev, offset,
	b43_radio_read16(dev, offset) & mask);
	}

	void b43_radio_set(struct b43_wldev *dev, u16 offset, u16 set)
	{
	b43_radio_write16(dev, offset,
	b43_radio_read16(dev, offset) \| set);
	}

	void b43_radio_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set)
	{
	b43_radio_write16(dev, offset,
	(b43_radio_read16(dev, offset) & mask) \| set);
	}

	bool b43_radio_wait_value(struct b43_wldev *dev, u16 offset, u16 mask,
	u16 value, int delay, int timeout)
	{
	u16 val;
	int i;

	for (i = 0; i < timeout; i += delay) {
	val = b43_radio_read(dev, offset);
	if ((val & mask) == value)
	return true;
	udelay(delay);
	}
	return false;
	}

	u16 b43_phy_read(struct b43_wldev *dev, u16 reg)
	{
	assert_mac_suspended(dev);
	dev->phy.writes_counter = 0;

	if (dev->phy.ops->phy_read)
	return dev->phy.ops->phy_read(dev, reg);

	b43_write16f(dev, B43_MMIO_PHY_CONTROL, reg);
	return b43_read16(dev, B43_MMIO_PHY_DATA);
	}

	void b43_phy_write(struct b43_wldev *dev, u16 reg, u16 value)
	{
	assert_mac_suspended(dev);
	if (b43_bus_host_is_pci(dev->dev) &&
	++dev->phy.writes_counter > B43_MAX_WRITES_IN_ROW) {
	b43_read16(dev, B43_MMIO_PHY_VER);
	dev->phy.writes_counter = 1;
	}

	if (dev->phy.ops->phy_write)
	return dev->phy.ops->phy_write(dev, reg, value);

	b43_write16f(dev, B43_MMIO_PHY_CONTROL, reg);
	b43_write16(dev, B43_MMIO_PHY_DATA, value);
	}

	void b43_phy_copy(struct b43_wldev *dev, u16 destreg, u16 srcreg)
	{
	b43_phy_write(dev, destreg, b43_phy_read(dev, srcreg));
	}

	void b43_phy_mask(struct b43_wldev *dev, u16 offset, u16 mask)
	{
	if (dev->phy.ops->phy_maskset) {
	assert_mac_suspended(dev);
	dev->phy.ops->phy_maskset(dev, offset, mask, 0);
	} else {
	b43_phy_write(dev, offset,
	b43_phy_read(dev, offset) & mask);
	}
	}

	void b43_phy_set(struct b43_wldev *dev, u16 offset, u16 set)
	{
	if (dev->phy.ops->phy_maskset) {
	assert_mac_suspended(dev);
	dev->phy.ops->phy_maskset(dev, offset, 0xFFFF, set);
	} else {
	b43_phy_write(dev, offset,
	b43_phy_read(dev, offset) \| set);
	}
	}

	void b43_phy_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set)
	{
	if (dev->phy.ops->phy_maskset) {
	assert_mac_suspended(dev);
	dev->phy.ops->phy_maskset(dev, offset, mask, set);
	} else {
	b43_phy_write(dev, offset,
	(b43_phy_read(dev, offset) & mask) \| set);
	}
	}

	void b43_phy_put_into_reset(struct b43_wldev *dev)
	{
	u32 tmp;

	switch (dev->dev->bus_type) {
	#ifdef CONFIG_B43_BCMA
	case B43_BUS_BCMA:
	tmp = bcma_aread32(dev->dev->bdev, BCMA_IOCTL);
	tmp &= ~B43_BCMA_IOCTL_GMODE;
	tmp \|= B43_BCMA_IOCTL_PHY_RESET;
	tmp \|= BCMA_IOCTL_FGC;
	bcma_awrite32(dev->dev->bdev, BCMA_IOCTL, tmp);
	udelay(1);

	tmp = bcma_aread32(dev->dev->bdev, BCMA_IOCTL);
	tmp &= ~BCMA_IOCTL_FGC;
	bcma_awrite32(dev->dev->bdev, BCMA_IOCTL, tmp);
	udelay(1);
	break;
	#endif
	#ifdef CONFIG_B43_SSB
	case B43_BUS_SSB:
	tmp = ssb_read32(dev->dev->sdev, SSB_TMSLOW);
	tmp &= ~B43_TMSLOW_GMODE;
	tmp \|= B43_TMSLOW_PHYRESET;
	tmp \|= SSB_TMSLOW_FGC;
	ssb_write32(dev->dev->sdev, SSB_TMSLOW, tmp);
	usleep_range(1000, 2000);

	tmp = ssb_read32(dev->dev->sdev, SSB_TMSLOW);
	tmp &= ~SSB_TMSLOW_FGC;
	ssb_write32(dev->dev->sdev, SSB_TMSLOW, tmp);
	usleep_range(1000, 2000);

	break;
	#endif
	}
	}

	void b43_phy_take_out_of_reset(struct b43_wldev *dev)
	{
	u32 tmp;

	switch (dev->dev->bus_type) {
	#ifdef CONFIG_B43_BCMA
	case B43_BUS_BCMA:
	/* Unset reset bit (with forcing clock) */
	tmp = bcma_aread32(dev->dev->bdev, BCMA_IOCTL);
	tmp &= ~B43_BCMA_IOCTL_PHY_RESET;
	tmp &= ~B43_BCMA_IOCTL_PHY_CLKEN;
	tmp \|= BCMA_IOCTL_FGC;
	bcma_awrite32(dev->dev->bdev, BCMA_IOCTL, tmp);
	udelay(1);

	/* Do not force clock anymore */
	tmp = bcma_aread32(dev->dev->bdev, BCMA_IOCTL);
	tmp &= ~BCMA_IOCTL_FGC;
	tmp \|= B43_BCMA_IOCTL_PHY_CLKEN;
	bcma_awrite32(dev->dev->bdev, BCMA_IOCTL, tmp);
	udelay(1);
	break;
	#endif
	#ifdef CONFIG_B43_SSB
	case B43_BUS_SSB:
	/* Unset reset bit (with forcing clock) */
	tmp = ssb_read32(dev->dev->sdev, SSB_TMSLOW);
	tmp &= ~B43_TMSLOW_PHYRESET;
	tmp &= ~B43_TMSLOW_PHYCLKEN;
	tmp \|= SSB_TMSLOW_FGC;
	ssb_write32(dev->dev->sdev, SSB_TMSLOW, tmp);
	ssb_read32(dev->dev->sdev, SSB_TMSLOW); /* flush */
	usleep_range(1000, 2000);

	tmp = ssb_read32(dev->dev->sdev, SSB_TMSLOW);
	tmp &= ~SSB_TMSLOW_FGC;
	tmp \|= B43_TMSLOW_PHYCLKEN;
	ssb_write32(dev->dev->sdev, SSB_TMSLOW, tmp);
	ssb_read32(dev->dev->sdev, SSB_TMSLOW); /* flush */
	usleep_range(1000, 2000);
	break;
	#endif
	}
	}

	int b43_switch_channel(struct b43_wldev *dev, unsigned int new_channel)
	{
	struct b43_phy *phy = &(dev->phy);
	u16 channelcookie, savedcookie;
	int err;

	/* First we set the channel radio code to prevent the
	* firmware from sending ghost packets.
	*/
	channelcookie = new_channel;
	if (b43_current_band(dev->wl) == IEEE80211_BAND_5GHZ)
	channelcookie \|= B43_SHM_SH_CHAN_5GHZ;
	/* FIXME: set 40Mhz flag if required */
	if (0)
	channelcookie \|= B43_SHM_SH_CHAN_40MHZ;
	savedcookie = b43_shm_read16(dev, B43_SHM_SHARED, B43_SHM_SH_CHAN);
	b43_shm_write16(dev, B43_SHM_SHARED, B43_SHM_SH_CHAN, channelcookie);

	/* Now try to switch the PHY hardware channel. */
	err = phy->ops->switch_channel(dev, new_channel);
	if (err)
	goto err_restore_cookie;

	/* Wait for the radio to tune to the channel and stabilize. */
	msleep(8);

	return 0;

	err_restore_cookie:
	b43_shm_write16(dev, B43_SHM_SHARED,
	B43_SHM_SH_CHAN, savedcookie);

	return err;
	}

	void b43_software_rfkill(struct b43_wldev *dev, bool blocked)
	{
	struct b43_phy *phy = &dev->phy;

	b43_mac_suspend(dev);
	phy->ops->software_rfkill(dev, blocked);
	phy->radio_on = !blocked;
	b43_mac_enable(dev);
	}

	/**
	* b43_phy_txpower_adjust_work - TX power workqueue.
	*
	* Workqueue for updating the TX power parameters in hardware.
	*/
	void b43_phy_txpower_adjust_work(struct work_struct *work)
	{
	struct b43_wl *wl = container_of(work, struct b43_wl,
	txpower_adjust_work);
	struct b43_wldev *dev;

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

	if (likely(dev && (b43_status(dev) >= B43_STAT_STARTED)))
	dev->phy.ops->adjust_txpower(dev);

	mutex_unlock(&wl->mutex);
	}

	void b43_phy_txpower_check(struct b43_wldev *dev, unsigned int flags)
	{
	struct b43_phy *phy = &dev->phy;
	unsigned long now = jiffies;
	enum b43_txpwr_result result;

	if (!(flags & B43_TXPWR_IGNORE_TIME)) {
	/* Check if it's time for a TXpower check. */
	if (time_before(now, phy->next_txpwr_check_time))
	return; /* Not yet */
	}
	/* The next check will be needed in two seconds, or later. */
	phy->next_txpwr_check_time = round_jiffies(now + (HZ * 2));

	if ((dev->dev->board_vendor == SSB_BOARDVENDOR_BCM) &&
	(dev->dev->board_type == SSB_BOARD_BU4306))
	return; /* No software txpower adjustment needed */

	result = phy->ops->recalc_txpower(dev, !!(flags & B43_TXPWR_IGNORE_TSSI));
	if (result == B43_TXPWR_RES_DONE)
	return; /* We are done. */
	B43_WARN_ON(result != B43_TXPWR_RES_NEED_ADJUST);
	B43_WARN_ON(phy->ops->adjust_txpower == NULL);

	/* We must adjust the transmission power in hardware.
	* Schedule b43_phy_txpower_adjust_work(). */
	ieee80211_queue_work(dev->wl->hw, &dev->wl->txpower_adjust_work);
	}

	int b43_phy_shm_tssi_read(struct b43_wldev *dev, u16 shm_offset)
	{
	const bool is_ofdm = (shm_offset != B43_SHM_SH_TSSI_CCK);
	unsigned int a, b, c, d;
	unsigned int average;
	u32 tmp;

	tmp = b43_shm_read32(dev, B43_SHM_SHARED, shm_offset);
	a = tmp & 0xFF;
	b = (tmp >> 8) & 0xFF;
	c = (tmp >> 16) & 0xFF;
	d = (tmp >> 24) & 0xFF;
	if (a == 0 \|\| a == B43_TSSI_MAX \|\|
	b == 0 \|\| b == B43_TSSI_MAX \|\|
	c == 0 \|\| c == B43_TSSI_MAX \|\|
	d == 0 \|\| d == B43_TSSI_MAX)
	return -ENOENT;
	/* The values are OK. Clear them. */
	tmp = B43_TSSI_MAX \| (B43_TSSI_MAX << 8) \|
	(B43_TSSI_MAX << 16) \| (B43_TSSI_MAX << 24);
	b43_shm_write32(dev, B43_SHM_SHARED, shm_offset, tmp);

	if (is_ofdm) {
	a = (a + 32) & 0x3F;
	b = (b + 32) & 0x3F;
	c = (c + 32) & 0x3F;
	d = (d + 32) & 0x3F;
	}

	/* Get the average of the values with 0.5 added to each value. */
	average = (a + b + c + d + 2) / 4;
	if (is_ofdm) {
	/* Adjust for CCK-boost */
	if (b43_shm_read16(dev, B43_SHM_SHARED, B43_SHM_SH_HOSTF1)
	& B43_HF_CCKBOOST)
	average = (average >= 13) ? (average - 13) : 0;
	}

	return average;
	}

	void b43_phyop_switch_analog_generic(struct b43_wldev *dev, bool on)
	{
	b43_write16(dev, B43_MMIO_PHY0, on ? 0 : 0xF4);
	}


	bool b43_is_40mhz(struct b43_wldev *dev)
	{
	return dev->phy.chandef->width == NL80211_CHAN_WIDTH_40;
	}

	/* http://bcm-v4.sipsolutions.net/802.11/PHY/N/BmacPhyClkFgc */
	void b43_phy_force_clock(struct b43_wldev *dev, bool force)
	{
	u32 tmp;

	WARN_ON(dev->phy.type != B43_PHYTYPE_N &&
	dev->phy.type != B43_PHYTYPE_HT &&
	dev->phy.type != B43_PHYTYPE_AC);

	switch (dev->dev->bus_type) {
	#ifdef CONFIG_B43_BCMA
	case B43_BUS_BCMA:
	tmp = bcma_aread32(dev->dev->bdev, BCMA_IOCTL);
	if (force)
	tmp \|= BCMA_IOCTL_FGC;
	else
	tmp &= ~BCMA_IOCTL_FGC;
	bcma_awrite32(dev->dev->bdev, BCMA_IOCTL, tmp);
	break;
	#endif
	#ifdef CONFIG_B43_SSB
	case B43_BUS_SSB:
	tmp = ssb_read32(dev->dev->sdev, SSB_TMSLOW);
	if (force)
	tmp \|= SSB_TMSLOW_FGC;
	else
	tmp &= ~SSB_TMSLOW_FGC;
	ssb_write32(dev->dev->sdev, SSB_TMSLOW, tmp);
	break;
	#endif
	}
	}

	/* http://bcm-v4.sipsolutions.net/802.11/PHY/Cordic */
	struct b43_c32 b43_cordic(int theta)
	{
	static const u32 arctg[] = {
	2949120, 1740967, 919879, 466945, 234379, 117304,
	58666, 29335, 14668, 7334, 3667, 1833,
	917, 458, 229, 115, 57, 29,
	};
	u8 i;
	s32 tmp;
	s8 signx = 1;
	u32 angle = 0;
	struct b43_c32 ret = { .i = 39797, .q = 0, };

	while (theta > (180 << 16))
	theta -= (360 << 16);
	while (theta < -(180 << 16))
	theta += (360 << 16);

	if (theta > (90 << 16)) {
	theta -= (180 << 16);
	signx = -1;
	} else if (theta < -(90 << 16)) {
	theta += (180 << 16);
	signx = -1;
	}

	for (i = 0; i <= 17; i++) {
	if (theta > angle) {
	tmp = ret.i - (ret.q >> i);
	ret.q += ret.i >> i;
	ret.i = tmp;
	angle += arctg[i];
	} else {
	tmp = ret.i + (ret.q >> i);
	ret.q -= ret.i >> i;
	ret.i = tmp;
	angle -= arctg[i];
	}
	}

	ret.i *= signx;
	ret.q *= signx;

	return ret;
	}