b43: Add more N-PHY stuff

This adds some minor stuff for N-PHY support. Nothing special.
Adds Analog switching and some TODOs for RSSI processing.
Just a patch I had floating around for quite some time now.

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

4 files changed, 41 insertions, 12 deletions

diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index 355f28a2f7f5..3fb4ef816842 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -46,6 +46,7 @@
 #include "main.h"
 #include "debugfs.h"
 #include "phy.h"
+#include "nphy.h"
 #include "dma.h"
 #include "pio.h"
 #include "sysfs.h"
@@ -1019,7 +1020,18 @@ void b43_power_saving_ctl_bits(struct b43_wldev *dev, unsigned int ps_flags)
 /* Turn the Analog ON/OFF */
 static void b43_switch_analog(struct b43_wldev *dev, int on)
 {
-        b43_write16(dev, B43_MMIO_PHY0, on ? 0 : 0xF4);
+        switch (dev->phy.type) {
+        case B43_PHYTYPE_A:
+        case B43_PHYTYPE_G:
+                b43_write16(dev, B43_MMIO_PHY0, on ? 0 : 0xF4);
+                break;
+        case B43_PHYTYPE_N:
+                b43_phy_write(dev, B43_NPHY_AFECTL_OVER,
+                              on ? 0 : 0x7FFF);
+                break;
+        default:
+                B43_WARN_ON(1);
+        }
 }
 
 void b43_wireless_core_reset(struct b43_wldev *dev, u32 flags)
diff --git a/drivers/net/wireless/b43/nphy.c b/drivers/net/wireless/b43/nphy.c
index 705131ef4bfa..8695eb223476 100644
--- a/drivers/net/wireless/b43/nphy.c
+++ b/drivers/net/wireless/b43/nphy.c
@@ -240,7 +240,6 @@ static void b43_nphy_workarounds(struct b43_wldev *dev)
 
         b43_phy_set(dev, B43_NPHY_IQFLIP,
                     B43_NPHY_IQFLIP_ADC1 | B43_NPHY_IQFLIP_ADC2);
-        //FIXME the following condition is different in the specs.
         if (1 /* FIXME band is 2.4GHz */) {
                 b43_phy_set(dev, B43_NPHY_CLASSCTL,
                             B43_NPHY_CLASSCTL_CCKEN);
diff --git a/drivers/net/wireless/b43/xmit.c b/drivers/net/wireless/b43/xmit.c
index b2a3123f42db..19aefbfb2c93 100644
--- a/drivers/net/wireless/b43/xmit.c
+++ b/drivers/net/wireless/b43/xmit.c
@@ -513,7 +513,6 @@ void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
         u32 macstat;
         u16 chanid;
         u16 phytype;
-        u8 jssi;
         int padding;
 
         memset(&status, 0, sizeof(status));
@@ -521,7 +520,6 @@ void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
         /* Get metadata about the frame from the header. */
         phystat0 = le16_to_cpu(rxhdr->phy_status0);
         phystat3 = le16_to_cpu(rxhdr->phy_status3);
-        jssi = rxhdr->jssi;
         macstat = le32_to_cpu(rxhdr->mac_status);
         mactime = le16_to_cpu(rxhdr->mac_time);
         chanstat = le16_to_cpu(rxhdr->channel);
@@ -575,13 +573,22 @@ void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
                 }
         }
 
-        status.ssi = b43_rssi_postprocess(dev, jssi,
-                                          (phystat0 & B43_RX_PHYST0_OFDM),
-                                          (phystat0 & B43_RX_PHYST0_GAINCTL),
-                                          (phystat3 & B43_RX_PHYST3_TRSTATE));
+        /* Link quality statistics */
         status.noise = dev->stats.link_noise;
-        /* the next line looks wrong, but is what mac80211 wants */
-        status.signal = (jssi * 100) / B43_RX_MAX_SSI;
+        if ((chanstat & B43_RX_CHAN_PHYTYPE) == B43_PHYTYPE_N) {
+//              s8 rssi = max(rxhdr->power0, rxhdr->power1);
+                //TODO: Find out what the rssi value is (dBm or percentage?)
+                //      and also find out what the maximum possible value is.
+                //      Fill status.ssi and status.signal fields.
+        } else {
+                status.ssi = b43_rssi_postprocess(dev, rxhdr->jssi,
+                                                  (phystat0 & B43_RX_PHYST0_OFDM),
+                                                  (phystat0 & B43_RX_PHYST0_GAINCTL),
+                                                  (phystat3 & B43_RX_PHYST3_TRSTATE));
+                /* the next line looks wrong, but is what mac80211 wants */
+                status.signal = (rxhdr->jssi * 100) / B43_RX_MAX_SSI;
+        }
+
         if (phystat0 & B43_RX_PHYST0_OFDM)
                 status.rate_idx = b43_plcp_get_bitrate_idx_ofdm(plcp,
                                                 phytype == B43_PHYTYPE_A);
diff --git a/drivers/net/wireless/b43/xmit.h b/drivers/net/wireless/b43/xmit.h
index 4f26988a5132..b05f44e0d626 100644
--- a/drivers/net/wireless/b43/xmit.h
+++ b/drivers/net/wireless/b43/xmit.h
@@ -212,8 +212,19 @@ struct b43_rxhdr_fw4 {
         __le16 frame_len;       /* Frame length */
          PAD_BYTES(2);
         __le16 phy_status0;     /* PHY RX Status 0 */
-        __u8 jssi;              /* PHY RX Status 1: JSSI */
-        __u8 sig_qual;          /* PHY RX Status 1: Signal Quality */
+        union {
+                /* RSSI for A/B/G-PHYs */
+                struct {
+                        __u8 jssi;      /* PHY RX Status 1: JSSI */
+                        __u8 sig_qual;  /* PHY RX Status 1: Signal Quality */
+                } __attribute__ ((__packed__));
+
+                /* RSSI for N-PHYs */
+                struct {
+                        __s8 power0;    /* PHY RX Status 1: Power 0 */
+                        __s8 power1;    /* PHY RX Status 1: Power 1 */
+                } __attribute__ ((__packed__));
+        } __attribute__ ((__packed__));
         __le16 phy_status2;     /* PHY RX Status 2 */
         __le16 phy_status3;     /* PHY RX Status 3 */
         __le32 mac_status;      /* MAC RX status */