Fix IC-705 filter selection and bandwidth handling for FM and WFM

* Enable `.fm_filters` in `IC705_priv_caps`
* `icom_get_mode_without_data()`: activate FM filter selection code if `RIG_IS_IC705`
* `icom2rig_mode()`: activate FM filter fixed width code if `RIG_IS_IC705`
* TODO: cases in WFM should be solved independently
* `icom2rig_mode()`: handle FM and WFM separately and correctly at least for IC-705, no changes for IC-7300 and IC-9700
* `icom_get_mode_without_data()`: add WFM to the code assuming that values from `icom2rig_mode()` is correct
* icom.c: A partial rollback for a395b91be6
* The workaround to use `icom_set_mode_without_data()` is not necessary
* The later experiments showed CI-V command 0x26 worked OK too for WFM
* Add WFM freq to ic705_caps.filters
* Fix icom_set_mode_x26() FM behavior

`icom_set_mode_x26()` did not pass the correct command value
for FM or PKTFM modes when width is set to
`RIG_PASSBAND_NORMAL` (i.e., 0 (zero)).
With this source code change,
the command value `buf[2]` is forcefully set to 1
when `RIG_PASSBAND_NORMAL` or `RIG_PASSBAND_NOCHANGE` are
passed to the parameter `width`.

This fix solves the bug for IC-705 with rigctl when
entering the command `M FM 0` after `M WFM 0` *did not*
change the mode properly to (narrow) FM.

rigs/icom/frame.c

@@ -814,8 +814,8 @@ void icom2rig_mode(RIG *rig, unsigned char md, int pd, rmode_t *mode,
     rig_debug(RIG_DEBUG_TRACE, "%s: mode=0x%02x, pd=%d\n", __func__, md, pd);
 
     // Some rigs return fixed with for FM mode
-    if ((RIG_IS_IC7300 || RIG_IS_IC9700) && (md == S_FM || md == S_WFM))
+    if (RIG_IS_IC7300 || RIG_IS_IC9700 || RIG_IS_IC705) {
-    {
+        if (md == S_FM) {
             *mode = RIG_MODE_FM;
 
             if (*width == 1) { *width = 15000; }
@@ -823,6 +823,18 @@ void icom2rig_mode(RIG *rig, unsigned char md, int pd, rmode_t *mode,
             else { *width = 7000; }
 
             return;
+        } else if (md == S_WFM) {
+           
+            // For IC-705, *width will always be 1
+            // At least this works for IC-705
+
+            *mode = RIG_MODE_WFM;
+            *width = 200000;
+
+            return;
+        }
+        // If not FM nor SFM mode,
+        // fall down this block for further processing
     }
 
     *width = RIG_PASSBAND_NORMAL;

rigs/icom/ic7300.c

@@ -637,7 +637,8 @@ static const struct icom_priv_caps IC705_priv_caps =
     .x1cx03_possibly = 1,
     .x1ax03_supported = 1,
     .mode_with_filter = 1,
-    .data_mode_supported = 1
+    .data_mode_supported = 1,
+    .fm_filters = { 7000, 10000, 15000 }
 };
 
 static const struct icom_priv_caps IC905_priv_caps =
@@ -1498,6 +1499,7 @@ struct rig_caps ic705_caps =
         {RIG_MODE_FM | RIG_MODE_PKTFM, kHz(10)},
         {RIG_MODE_FM | RIG_MODE_PKTFM, kHz(7)},
         {RIG_MODE_FM | RIG_MODE_PKTFM, kHz(15)},
+        {RIG_MODE_WFM, kHz(200)},
         RIG_FLT_END,
     },
 

rigs/icom/icom.c

@@ -2441,6 +2441,22 @@ static int icom_set_mode_x26(RIG *rig, vfo_t vfo, rmode_t mode,
         if (width > 10000) { buf[2] = 1; }
         else if (width > 7000) { buf[2] = 2; }
         else if (width > 3) { buf[2] = 3; }
+        // Set "normal" bandwidth explicitly here
+        // when width is zero or even less
+        // (namely RIG_PASSBAND_NORMAL or RIG_PASSBAND_NOCHANGE)
+        else if (width < 1) { buf[2] = 1; }
+
+        if (width == RIG_PASSBAND_NOCHANGE)
+        {
+            buf_len = 1;
+        }
+    }
+    else if (mode == RIG_MODE_WFM)
+    {
+        rig_debug(RIG_DEBUG_TRACE, "%s: wfm_width=%d\n", __func__, (int)width);
+        // For IC-705, there's only one filter mode for WFM
+        // So set always to 1
+        buf[2] = 1;
 
         if (width == RIG_PASSBAND_NOCHANGE)
         {
@@ -2574,9 +2590,7 @@ int icom_set_mode(RIG *rig, vfo_t vfo, rmode_t mode, pbwidth_t width)
               (int) base_mode, (int) width, rig_strvfo(rs->current_vfo));
 
     // It is only necessary to change base mode if command 0x26 is not supported
-    // NOTE: IC-705 does not support WFM for command 0x26
+    if (!(rs->targetable_vfo & RIG_TARGETABLE_MODE) || force_vfo_swap)
-    if (!(rs->targetable_vfo & RIG_TARGETABLE_MODE) || force_vfo_swap ||
-        (RIG_IS_IC705 && (mode == RIG_MODE_WFM)))
     {
         retval = icom_set_mode_without_data(rig, vfo, base_mode, width);
     }
@@ -2625,8 +2639,8 @@ int icom_set_mode(RIG *rig, vfo_t vfo, rmode_t mode, pbwidth_t width)
             if (datamode[0] == 0) { datamode[1] = 0; } // the only good combo possible according to manual
 
             // we need to let FM mode widths through here with datamode[1] set to FM width
-            if ((priv_caps->fm_filters[0] != 0) && (mode == RIG_MODE_FM
+            // (This is not applicable to WFM)
-                                                    || mode == RIG_MODE_WFM))
+            if ((priv_caps->fm_filters[0] != 0) && (mode == RIG_MODE_FM))
             {
                 // assumed fm_filters is ascending sequence -- see ic7300.c for example
                 if (width >= 1 && width <= 3) { datamode[1] = width; }
@@ -2653,6 +2667,13 @@ int icom_set_mode(RIG *rig, vfo_t vfo, rmode_t mode, pbwidth_t width)
             {
                 if (datamode[0] == 0) { datamode[1] = 0; }
 
+                // For IC-705, this is the only valid values for WFM
+                if (RIG_IS_IC705 && (mode == RIG_MODE_WFM))
+                {
+                    datamode[0] = 0;
+                    datamode[1] = 1;    
+                }
+
                 retval = icom_set_mode_x26(rig, vfo, mode, mode_icom, datamode[0], datamode[1],
                                            width);
             }
@@ -2816,8 +2837,8 @@ static int icom_get_mode_without_data(RIG *rig, vfo_t vfo, rmode_t *mode,
                       mode_len == 2 ? modebuf[2] : -1, mode, width);
     }
 
-    if ((RIG_IS_IC7300 || RIG_IS_IC9700) && (*mode == RIG_MODE_FM
+    if ((RIG_IS_IC7300 || RIG_IS_IC9700 || RIG_IS_IC705) && (*mode == RIG_MODE_FM
-            || *mode == RIG_MODE_PKTFM))
+            || *mode == RIG_MODE_PKTFM || *mode == RIG_MODE_WFM))
     {
         // we already have width from icom2rig_mode
         RETURNFUNC2(RIG_OK);
@@ -2849,7 +2870,7 @@ static int icom_get_mode_without_data(RIG *rig, vfo_t vfo, rmode_t *mode,
 
     if (vfo == rs->current_vfo)
     {
-        if (!((RIG_IS_IC7300 || RIG_IS_IC9700) && (*mode == RIG_MODE_FM
+        if (!((RIG_IS_IC7300 || RIG_IS_IC9700 || RIG_IS_IC705) && (*mode == RIG_MODE_FM
                 || *mode == RIG_MODE_PKTFM))) // can't do this in FM mode
         {
             filter_width = icom_get_dsp_flt(rig, *mode);
@@ -2872,13 +2893,18 @@ static int icom_get_mode_without_data(RIG *rig, vfo_t vfo, rmode_t *mode,
     {
         *width = 12000; // some default to 12000
 
-        if (RIG_IS_IC7300 || RIG_IS_IC9700)
+        if (RIG_IS_IC7300 || RIG_IS_IC9700 || RIG_IS_IC705)
         {
             if (priv_data->filter == 1) { *width = 15000; }
             else if (priv_data->filter == 2) { *width = 10000; }
             else if (priv_data->filter == 3) { *width = 7000; }
         }
     }
+    else if (*mode == RIG_MODE_WFM)
+    {
+        // IC-705 only valid value
+        if (RIG_IS_IC705) { *width = 200000; }
+    }
 
     RETURNFUNC2(RIG_OK);
 }