[PATCH] b43: Add LP PHY Analog Switch Support

[Thomas Ilnseher <illth@gmx.de>]

The current verison of b43 uses "b43_phyop_switch_analog_generic" for A,
G and LP phys.

According to the spec, this is the wrong behaviour for the LP PHY
(see: http://bcm-v4.sipsolutions.net/802.11/PHY/Anacore )

While no problems on the x86 plattform where seen, this leads to a crash
on the BCM5354 SoC (MIPS 32 LE plattform).
This patch implements the analog switch for LP PHYs according to the
specs. It fixes the crash

signed-off-by: Thomas Ilnseher <illth@gmx.de>
---
diff -uNr b/drivers/net/wireless/b43/phy_lp.c
a/drivers/net/wireless/b43/phy_lp.c
--- b/drivers/net/wireless/b43/phy_lp.c 2009-09-14 06:14:18.000000000 +0200
+++ a/drivers/net/wireless/b43/phy_lp.c 2009-09-14 21:03:15.158507573 +0200
@@ -2228,6 +2228,16 @@
        return B43_TXPWR_RES_DONE;
 }
 
+void b43_lpphy_op_switch_analog(struct b43_wldev *dev, bool on)
+{
+       if (on) {
+               b43_phy_mask(dev, B43_LPPHY_AFE_CTL_OVR, 0xfff8);
+       } else {
+               b43_phy_set(dev, B43_LPPHY_AFE_CTL_OVRVAL, 0x0007);
+               b43_phy_set(dev, B43_LPPHY_AFE_CTL_OVR, 0x0007);
+       }
+}
+
 const struct b43_phy_operations b43_phyops_lp = {
        .allocate               = b43_lpphy_op_allocate,
        .free                   = b43_lpphy_op_free,
@@ -2239,7 +2249,7 @@
        .radio_read             = b43_lpphy_op_radio_read,
        .radio_write            = b43_lpphy_op_radio_write,
        .software_rfkill        = b43_lpphy_op_software_rfkill,
-       .switch_analog          = b43_phyop_switch_analog_generic,
+       .switch_analog          = b43_lpphy_op_switch_analog,
        .switch_channel         = b43_lpphy_op_switch_channel,
        .get_default_chan       = b43_lpphy_op_get_default_chan,
        .set_rx_antenna         = b43_lpphy_op_set_rx_antenna,