b43: N-PHY: add RSSI polling and setting 2055 (radio) VCM

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43/phy_n.c

@@ -586,6 +586,102 @@ static void b43_nphy_rssi_select(struct b43_wldev *dev, u8 code, u8 type)
 	}
 }
 
+/* http://bcm-v4.sipsolutions.net/802.11/PHY/N/SetRssi2055Vcm */
+static void b43_nphy_set_rssi_2055_vcm(struct b43_wldev *dev, u8 type, u8 *buf)
+{
+	int i;
+	for (i = 0; i < 2; i++) {
+		if (type == 2) {
+			if (i == 0) {
+				b43_radio_maskset(dev, B2055_C1_B0NB_RSSIVCM,
+						  0xFC, buf[0]);
+				b43_radio_maskset(dev, B2055_C1_RX_BB_RSSICTL5,
+						  0xFC, buf[1]);
+			} else {
+				b43_radio_maskset(dev, B2055_C2_B0NB_RSSIVCM,
+						  0xFC, buf[2 * i]);
+				b43_radio_maskset(dev, B2055_C2_RX_BB_RSSICTL5,
+						  0xFC, buf[2 * i + 1]);
+			}
+		} else {
+			if (i == 0)
+				b43_radio_maskset(dev, B2055_C1_RX_BB_RSSICTL5,
+						  0xF3, buf[0] << 2);
+			else
+				b43_radio_maskset(dev, B2055_C2_RX_BB_RSSICTL5,
+						  0xF3, buf[2 * i + 1] << 2);
+		}
+	}
+}
+
+/* http://bcm-v4.sipsolutions.net/802.11/PHY/N/PollRssi */
+static int b43_nphy_poll_rssi(struct b43_wldev *dev, u8 type, s32 *buf,
+				u8 nsamp)
+{
+	int i;
+	int out;
+	u16 save_regs_phy[9];
+	u16 s[2];
+
+	if (dev->phy.rev >= 3) {
+		save_regs_phy[0] = b43_phy_read(dev,
+						B43_NPHY_RFCTL_LUT_TRSW_UP1);
+		save_regs_phy[1] = b43_phy_read(dev,
+						B43_NPHY_RFCTL_LUT_TRSW_UP2);
+		save_regs_phy[2] = b43_phy_read(dev, B43_NPHY_AFECTL_C1);
+		save_regs_phy[3] = b43_phy_read(dev, B43_NPHY_AFECTL_C2);
+		save_regs_phy[4] = b43_phy_read(dev, B43_NPHY_AFECTL_OVER1);
+		save_regs_phy[5] = b43_phy_read(dev, B43_NPHY_AFECTL_OVER);
+		save_regs_phy[6] = b43_phy_read(dev, B43_NPHY_TXF_40CO_B1S0);
+		save_regs_phy[7] = b43_phy_read(dev, B43_NPHY_TXF_40CO_B32S1);
+	}
+
+	b43_nphy_rssi_select(dev, 5, type);
+
+	if (dev->phy.rev < 2) {
+		save_regs_phy[8] = b43_phy_read(dev, B43_NPHY_GPIO_SEL);
+		b43_phy_write(dev, B43_NPHY_GPIO_SEL, 5);
+	}
+
+	for (i = 0; i < 4; i++)
+		buf[i] = 0;
+
+	for (i = 0; i < nsamp; i++) {
+		if (dev->phy.rev < 2) {
+			s[0] = b43_phy_read(dev, B43_NPHY_GPIO_LOOUT);
+			s[1] = b43_phy_read(dev, B43_NPHY_GPIO_HIOUT);
+		} else {
+			s[0] = b43_phy_read(dev, B43_NPHY_RSSI1);
+			s[1] = b43_phy_read(dev, B43_NPHY_RSSI2);
+		}
+
+		buf[0] += ((s8)((s[0] & 0x3F) << 2)) >> 2;
+		buf[1] += ((s8)(((s[0] >> 8) & 0x3F) << 2)) >> 2;
+		buf[2] += ((s8)((s[1] & 0x3F) << 2)) >> 2;
+		buf[3] += ((s8)(((s[1] >> 8) & 0x3F) << 2)) >> 2;
+	}
+	out = (buf[0] & 0xFF) << 24 | (buf[1] & 0xFF) << 16 |
+		(buf[2] & 0xFF) << 8 | (buf[3] & 0xFF);
+
+	if (dev->phy.rev < 2)
+		b43_phy_write(dev, B43_NPHY_GPIO_SEL, save_regs_phy[8]);
+
+	if (dev->phy.rev >= 3) {
+		b43_phy_write(dev, B43_NPHY_RFCTL_LUT_TRSW_UP1,
+				save_regs_phy[0]);
+		b43_phy_write(dev, B43_NPHY_RFCTL_LUT_TRSW_UP2,
+				save_regs_phy[1]);
+		b43_phy_write(dev, B43_NPHY_AFECTL_C1, save_regs_phy[2]);
+		b43_phy_write(dev, B43_NPHY_AFECTL_C2, save_regs_phy[3]);
+		b43_phy_write(dev, B43_NPHY_AFECTL_OVER1, save_regs_phy[4]);
+		b43_phy_write(dev, B43_NPHY_AFECTL_OVER, save_regs_phy[5]);
+		b43_phy_write(dev, B43_NPHY_TXF_40CO_B1S0, save_regs_phy[6]);
+		b43_phy_write(dev, B43_NPHY_TXF_40CO_B32S1, save_regs_phy[7]);
+	}
+
+	return out;
+}
+
 /* http://bcm-v4.sipsolutions.net/802.11/PHY/N/RSSICal */
 static void b43_nphy_rev2_rssi_cal(struct b43_wldev *dev, u8 type)
 {