b43: HT-PHY: implement killing radio

Closed drivers kill radio right after reading radio version and MACCTL,
so it was easy to find related PHY ops:
phy_read(0x0810) -> 0x0000
phy_write(0x0810) <- 0x0000
To find out the mask of above OP, MMIO hack was used to fake read val:
phy_read(0x0810) -> 0xffff
phy_write(0x0810) <- 0x0000

Signed-off-by: Rafał Miłecki <[e-mail]>
Signed-off-by: John W. Linville <[e-mail]>

drivers/net/wireless/b43/phy_ht.c

···
 	phy->ht = NULL;
 }
 
+/* http://bcm-v4.sipsolutions.net/802.11/Radio/Switch%20Radio */
+static void b43_phy_ht_op_software_rfkill(struct b43_wldev *dev,
+					bool blocked)
+{
+	if (b43_read32(dev, B43_MMIO_MACCTL) & B43_MACCTL_ENABLED)
+		b43err(dev->wl, "MAC not suspended\n");
+
+	if (blocked) {
+		b43_phy_mask(dev, B43_PHY_HT_RF_CTL1, ~0);
+	} else {
+	}
+}
+
 static void b43_phy_ht_op_switch_analog(struct b43_wldev *dev, bool on)
 {
 	if (on) {
···
 	.phy_maskset		= b43_phy_ht_op_maskset,
 	.radio_read		= b43_phy_ht_op_radio_read,
 	.radio_write		= b43_phy_ht_op_radio_write,
-	/*
 	.software_rfkill	= b43_phy_ht_op_software_rfkill,
-	*/
 	.switch_analog		= b43_phy_ht_op_switch_analog,
 	/*
 	.switch_channel		= b43_phy_ht_op_switch_channel,

drivers/net/wireless/b43/phy_ht.h

···
 #define B43_PHY_HT_TABLE_DATALO			0x073 /* Table data low */
 #define B43_PHY_HT_TABLE_DATAHI			0x074 /* Table data high */
 
+#define B43_PHY_HT_RF_CTL1			B43_PHY_EXTG(0x010)
+
 #define B43_PHY_HT_AFE_CTL1			B43_PHY_EXTG(0x110)
 #define B43_PHY_HT_AFE_CTL2			B43_PHY_EXTG(0x111)
 #define B43_PHY_HT_AFE_CTL3			B43_PHY_EXTG(0x114)