b43: Implement dynamic PHY API

This patch implements a dynamic "ops" based PHY API.
This is needed in order to conveniently support future PHY types
to avoid the "switch"-hell.

This patch does not change any functionality. It just moves lots
of code from one place to another and adjusts it for the changed
data structures.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 276 insertions, 0 deletions

diff --git a/drivers/net/wireless/b43/phy_common.c b/drivers/net/wireless/b43/phy_common.c
new file mode 100644
index 00000000000..45074c05d51
--- /dev/null
+++ b/drivers/net/wireless/b43/phy_common.c
@@ -0,0 +1,276 @@
+/*
+
+  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);
+}