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/*
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 <mb@bu3sch.de>
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 "nphy.h"
#include "b43.h"
#include "main.h"
int b43_phy_operations_setup(struct b43_wldev *dev)
{
struct b43_phy *phy = &(dev->phy);
int err;
phy->ops = NULL;
switch (phy->type) {
case B43_PHYTYPE_A:
phy->ops = &b43_phyops_a;
break;
case B43_PHYTYPE_G:
phy->ops = &b43_phyops_g;
break;
case B43_PHYTYPE_N:
#ifdef CONFIG_B43_NPHY
phy->ops = &b43_phyops_n;
#endif
break;
case B43_PHYTYPE_LP:
/* FIXME: Not yet */
break;
}
if (B43_WARN_ON(!phy->ops))
return -ENODEV;
err = phy->ops->allocate(dev);
if (err)
phy->ops = NULL;
return err;
}
int b43_phy_init(struct b43_wldev *dev)
{
struct b43_phy *phy = &dev->phy;
const struct b43_phy_operations *ops = phy->ops;
int err;
phy->channel = ops->get_default_chan(dev);
ops->software_rfkill(dev, RFKILL_STATE_UNBLOCKED);
err = ops->init(dev);
if (err) {
b43err(dev->wl, "PHY init failed\n");
goto err_block_rf;
}
/* Make sure to switch hardware and firmware (SHM) to
* the default channel. */
err = b43_switch_channel(dev, ops->get_default_chan(dev));
if (err) {
b43err(dev->wl, "PHY init: Channel switch to default failed\n");
goto err_phy_exit;
}
return 0;
err_phy_exit:
if (ops->exit)
ops->exit(dev);
err_block_rf:
ops->software_rfkill(dev, RFKILL_STATE_SOFT_BLOCKED);
return err;
}
void b43_phy_exit(struct b43_wldev *dev)
{
const struct b43_phy_operations *ops = dev->phy.ops;
ops->software_rfkill(dev, RFKILL_STATE_SOFT_BLOCKED);
if (ops->exit)
ops->exit(dev);
}
bool b43_has_hardware_pctl(struct b43_wldev *dev)
{
if (!dev->phy.hardware_power_control)
return 0;
if (!dev->phy.ops->supports_hwpctl)
return 0;
return dev->phy.ops->supports_hwpctl(dev);
}
void b43_radio_lock(struct b43_wldev *dev)
{
u32 macctl;
macctl = b43_read32(dev, B43_MMIO_MACCTL);
B43_WARN_ON(macctl & B43_MACCTL_RADIOLOCK);
macctl |= B43_MACCTL_RADIOLOCK;
b43_write32(dev, B43_MMIO_MACCTL, macctl);
/* Commit the write and wait for the device
* to exit any radio register access. */
b43_read32(dev, B43_MMIO_MACCTL);
udelay(10);
}
void b43_radio_unlock(struct b43_wldev *dev)
{
u32 macctl;
/* Commit any write */
b43_read16(dev, B43_MMIO_PHY_VER);
/* unlock */
macctl = b43_read32(dev, B43_MMIO_MACCTL);
B43_WARN_ON(!(macctl & B43_MACCTL_RADIOLOCK));
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 = 1;
#endif
B43_WARN_ON(dev->dev->id.revision < 3);
if (!b43_is_mode(dev->wl, IEEE80211_IF_TYPE_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 = 0;
#endif
B43_WARN_ON(dev->dev->id.revision < 3);
if (!b43_is_mode(dev->wl, IEEE80211_IF_TYPE_AP))
b43_power_saving_ctl_bits(dev, 0);
}
u16 b43_radio_read(struct b43_wldev *dev, u16 reg)
{
return dev->phy.ops->radio_read(dev, reg);
}
void b43_radio_write(struct b43_wldev *dev, u16 reg, u16 value)
{
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);
}
u16 b43_phy_read(struct b43_wldev *dev, u16 reg)
{
return dev->phy.ops->phy_read(dev, reg);
}
void b43_phy_write(struct b43_wldev *dev, u16 reg, u16 value)
{
dev->phy.ops->phy_write(dev, reg, value);
}
void b43_phy_mask(struct b43_wldev *dev, u16 offset, u16 mask)
{
b43_phy_write(dev, offset,
b43_phy_read(dev, offset) & mask);
}
void b43_phy_set(struct b43_wldev *dev, u16 offset, u16 set)
{
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)
{
b43_phy_write(dev, offset,
(b43_phy_read(dev, offset) & mask) | set);
}
int b43_switch_channel(struct b43_wldev *dev, unsigned int new_channel)
{
struct b43_phy *phy = &(dev->phy);
u16 channelcookie, savedcookie;
int err;
if (new_channel == B43_DEFAULT_CHANNEL)
new_channel = phy->ops->get_default_chan(dev);
/* 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 |= 0x100;
//FIXME set 40Mhz flag if required
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;
dev->phy.channel = new_channel;
/* 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, enum rfkill_state state)
{
struct b43_phy *phy = &dev->phy;
if (state == RFKILL_STATE_HARD_BLOCKED) {
/* We cannot hardware-block the device */
state = RFKILL_STATE_SOFT_BLOCKED;
}
phy->ops->software_rfkill(dev, state);
phy->radio_on = (state == RFKILL_STATE_UNBLOCKED);
}
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