p54: enhance rssi->dBm database import

This patch fixes several shortcomings of the
previous implementation. Features of the
rewrite include:

 * handles undocumented "0x0000" word at the
   start of the frequency table.
   (Affected some early? DELL 1450 USB devices
    and my Symbol 5GHz miniPCI card.)

 * supports more than just one reference point
   per band. (Also needed for the Symbol card.)

 * ships with default values in case the eeprom
   data is damaged, absent or unsupported.

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/drivers/net/wireless/p54/fwio.c b/drivers/net/wireless/p54/fwio.c
index 92b9b1f05fd5..0d3d108f6fe2 100644
--- a/drivers/net/wireless/p54/fwio.c
+++ b/drivers/net/wireless/p54/fwio.c
@@ -397,9 +397,9 @@ int p54_scan(struct p54_common *priv, u16 mode, u16 dwell)
         union p54_scan_body_union *body;
         struct p54_scan_tail_rate *rate;
         struct pda_rssi_cal_entry *rssi;
+        struct p54_rssi_db_entry *rssi_data;
         unsigned int i;
         void *entry;
-        int band = priv->hw->conf.channel->band;
         __le16 freq = cpu_to_le16(priv->hw->conf.channel->center_freq);
 
         skb = p54_alloc_skb(priv, P54_HDR_FLAG_CONTROL_OPSET, sizeof(*head) +
@@ -503,13 +503,14 @@ int p54_scan(struct p54_common *priv, u16 mode, u16 dwell)
         }
 
         rssi = (struct pda_rssi_cal_entry *) skb_put(skb, sizeof(*rssi));
-        rssi->mul = cpu_to_le16(priv->rssical_db[band].mul);
-        rssi->add = cpu_to_le16(priv->rssical_db[band].add);
+        rssi_data = p54_rssi_find(priv, le16_to_cpu(freq));
+        rssi->mul = cpu_to_le16(rssi_data->mul);
+        rssi->add = cpu_to_le16(rssi_data->add);
         if (priv->rxhw == PDR_SYNTH_FRONTEND_LONGBOW) {
                 /* Longbow frontend needs ever more */
                 rssi = (void *) skb_put(skb, sizeof(*rssi));
-                rssi->mul = cpu_to_le16(priv->rssical_db[band].longbow_unkn);
-                rssi->add = cpu_to_le16(priv->rssical_db[band].longbow_unk2);
+                rssi->mul = cpu_to_le16(rssi_data->longbow_unkn);
+                rssi->add = cpu_to_le16(rssi_data->longbow_unk2);
         }
 
         if (priv->fw_var >= 0x509) {
@@ -523,6 +524,7 @@ int p54_scan(struct p54_common *priv, u16 mode, u16 dwell)
         hdr->len = cpu_to_le16(skb->len - sizeof(*hdr));
 
         p54_tx(priv, skb);
+        priv->cur_rssi = rssi_data;
         return 0;
 
 err: