Do some cleanup, adjustment and a couple fixes to recent sound changes.

* SOUND_x enum can be generated by audiohw_settings.h along with settings
entries and sound_val2phys.

* VOLUME_MIN and VOLUME_MAX are no longer necessary within sound.c. If
you need them, they are for target-defined purposes.

* Fix up SDL volume implementation in sdl.c. Move sim volume calculation
code to pcm-sdl.c.

* Min trigger tresholds were based upon VOLUME_MIN for some reason.
These setting have nothing to do with playback volume. Since it is no
longer present, set these at -89dB which is the minimum peak meter
sensitivity setting.

* Fix an oversight in wm8758.c. I forgot to add the dB->register
conversion to audiohw_set_volume.

Change-Id: Ie1df33f1793eee75e6793f16bc7bddd16edb7f75

16 files changed, 57 insertions, 51 deletions

diff --git a/firmware/drivers/audio/aic3x.c b/firmware/drivers/audio/aic3x.c
index 60330f1..9b705db 100644
--- a/firmware/drivers/audio/aic3x.c
+++ b/firmware/drivers/audio/aic3x.c
@@ -37,17 +37,17 @@ static char volume_left = 0, volume_right = 0;
 static int vol_tenthdb2hw(int db)
 {
     /* 0 to -63.0dB in 1dB steps, aic3x can goto -63.5 in 0.5dB steps */
-    if (db < VOLUME_MIN)
+    if (db <= -640)
     {
         return 0x7E;
     }
-    else if (db >= VOLUME_MAX)
+    else if (db >= 0)
     {
         return 0x00;
     }
     else
     {
-        return (-((db)/5)); /* VOLUME_MIN is negative */
+        return (-((db)/5));
     }
 }
 
diff --git a/firmware/drivers/audio/ak4537.c b/firmware/drivers/audio/ak4537.c
index 1628af8..90d264e 100644
--- a/firmware/drivers/audio/ak4537.c
+++ b/firmware/drivers/audio/ak4537.c
@@ -67,9 +67,9 @@ static void codec_set_active(int active)
 /* convert tenth of dB volume (-1270..0) to master volume register value */
 static int vol_tenthdb2hw(int db)
 {
-    if (db < VOLUME_MIN)
+    if (db <= -1280)
         return 0xff; /* mute */
-    else if (db >= VOLUME_MAX)
+    else if (db >= 0)
         return 0x00;
     else
         return ((-db)/5);
diff --git a/firmware/drivers/audio/as3514.c b/firmware/drivers/audio/as3514.c
index e1c7f65..1f79277 100644
--- a/firmware/drivers/audio/as3514.c
+++ b/firmware/drivers/audio/as3514.c
@@ -31,6 +31,16 @@
 #include "i2s.h"
 #include "ascodec.h"
 
+#if CONFIG_CPU == AS3525v2 
+/* Headphone volume goes from -81.0 ... +6dB */
+#define VOLUME_MIN -820
+#define VOLUME_MAX   60
+#else
+/* Headphone volume goes from -73.5 ... +6dB */
+#define VOLUME_MIN -740
+#define VOLUME_MAX   60
+#endif
+
 /*
  * This drivers supports:
  * as3514 , as used in the PP targets
@@ -99,13 +109,12 @@ static void as3514_write_masked(unsigned int reg, unsigned int bits,
 /* convert tenth of dB volume to master volume register value */
 static int vol_tenthdb2hw(int db)
 {
-    /* +6 to -73.5dB (or -81.0 dB) in 1.5dB steps == 53 (or 58) levels */
-    if (db < VOLUME_MIN) {
+    if (db <= VOLUME_MIN) {
         return 0x0;
     } else if (db > VOLUME_MAX) {
-        return (VOLUME_MAX-VOLUME_MIN)/15;
+        return (VOLUME_MAX - VOLUME_MIN) / 15;
     } else {
-        return((db-VOLUME_MIN)/15); /* VOLUME_MIN is negative */
+        return  (db - VOLUME_MIN) / 15;
     }
 }
 
diff --git a/firmware/drivers/audio/cs42l55.c b/firmware/drivers/audio/cs42l55.c
index 6c6e17a..02c80da 100644
--- a/firmware/drivers/audio/cs42l55.c
+++ b/firmware/drivers/audio/cs42l55.c
@@ -38,7 +38,7 @@ static int vol_tenthdb2hw(int db)
     /* 0001100 == +12dB (0xc) */
     /* 0000000 == 0dB   (0x0) */
     /* 1000100 == -60dB (0x44, this is actually -58dB) */
-    if (db < VOLUME_MIN) return HPACTL_HPAMUTE;
+    if (db <= -600) return HPACTL_HPAMUTE;
     return (db / 10) & HPACTL_HPAVOL_MASK;
 }
 
diff --git a/firmware/drivers/audio/dummy_codec.c b/firmware/drivers/audio/dummy_codec.c
index 3e73137..fbbe836 100644
--- a/firmware/drivers/audio/dummy_codec.c
+++ b/firmware/drivers/audio/dummy_codec.c
@@ -40,9 +40,9 @@ void audiohw_set_frequency(int fsel)
 #ifdef HAVE_SW_VOLUME_CONTROL
 void audiohw_set_volume(int vol_l, int vol_r)
 {
-    /* SW volume for <= 1.0 gain, HW at unity, < VOLUME_MIN == MUTE */
-    int sw_volume_l = vol_l < VOLUME_MIN ? PCM_MUTE_LEVEL : MIN(vol_l, 0);
-    int sw_volume_r = vol_r < VOLUME_MIN ? PCM_MUTE_LEVEL : MIN(vol_r, 0);
+    /* SW volume for <= 1.0 gain, HW at unity, <= DUMMY_VOLUME_MIN == MUTE */
+    int sw_volume_l = vol_l <= DUMMY_VOLUME_MIN ? PCM_MUTE_LEVEL : vol_l;
+    int sw_volume_r = vol_r <= DUMMY_VOLUME_MIN ? PCM_MUTE_LEVEL : vol_r;
     pcm_set_master_volume(sw_volume_l, sw_volume_r);
 }
 #endif /* HAVE_SW_VOLUME_CONTROL */
diff --git a/firmware/drivers/audio/rk27xx_codec.c b/firmware/drivers/audio/rk27xx_codec.c
index 8f294ba..2b0f2db 100644
--- a/firmware/drivers/audio/rk27xx_codec.c
+++ b/firmware/drivers/audio/rk27xx_codec.c
@@ -58,7 +58,7 @@ static int vol_tenthdb2hw(int tdb)
      * depending on gain region.
      */
 
-    if (tdb < VOLUME_MIN)
+    if (tdb <= -340)
         return 32;
     else if (tdb < -115)
         return -(((tdb + 115)/20) - 20); /* 2.0 dB steps */
diff --git a/firmware/drivers/audio/sdl.c b/firmware/drivers/audio/sdl.c
index c14ba0c..f35cec8 100644
--- a/firmware/drivers/audio/sdl.c
+++ b/firmware/drivers/audio/sdl.c
@@ -23,6 +23,12 @@
 #include "config.h"
 #include "sound.h"
 #include "pcm_sampr.h"
+#if CONFIG_CODEC == SWCODEC
+#include "fixedpoint.h"
+#ifdef HAVE_SW_VOLUME_CONTROL
+#include "pcm_sw_volume.h"
+#endif
+#endif
 
 /**
  * Audio Hardware api. Make them do nothing as we cannot properly simulate with
@@ -30,8 +36,6 @@
  **/
 
 #ifdef HAVE_SW_VOLUME_CONTROL
-#include "pcm_sw_volume.h"
-
 void audiohw_set_volume(int vol_l, int vol_r)
 {
     pcm_set_master_volume(vol_l, vol_r);
@@ -39,21 +43,13 @@ void audiohw_set_volume(int vol_l, int vol_r)
 
 #else /* ndef HAVE_SW_VOLUME_CONTROL */
 
-extern void pcm_set_mixer_volume(int);
 
 void audiohw_set_volume(int volume)
 {
 #if CONFIG_CODEC == SWCODEC
-#if !(CONFIG_PLATFORM & PLATFORM_MAEMO5)
-    if (volume < VOLUME_MIN)
-        volume = 0;
-    else
-        volume = SDL_MIX_MAXVOLUME * (volume - VOLUME_MIN + ONE_DB) /
-                    (VOLUME_RANGE + ONE_DB);
-#endif /* !(CONFIG_PLATFORM & PLATFORM_MAEMO5) */
-
+    extern void pcm_set_mixer_volume(int volume);
     pcm_set_mixer_volume(volume);
-#endif /* CONFIG_CODEC == SWCODEC */
+#endif
     (void)volume;
 }
 #endif /* HAVE_SW_VOLUME_CONTROL */
diff --git a/firmware/drivers/audio/tlv320.c b/firmware/drivers/audio/tlv320.c
index 6118734..9fa676f 100644
--- a/firmware/drivers/audio/tlv320.c
+++ b/firmware/drivers/audio/tlv320.c
@@ -40,7 +40,7 @@ static int vol_tenthdb2hw(int db)
     /* 0110000 == -73dB (0x30) */
     /* 0101111 == mute  (0x2f) */
 
-    if (db < VOLUME_MIN) {
+    if (db <= -740) {
         return 0x2f;
     } else {
         return((db/10)+73+0x30);
diff --git a/firmware/drivers/audio/tsc2100.c b/firmware/drivers/audio/tsc2100.c
index fda192a..b74d445 100644
--- a/firmware/drivers/audio/tsc2100.c
+++ b/firmware/drivers/audio/tsc2100.c
@@ -34,12 +34,12 @@ static bool is_muted = false;
 static int vol_tenthdb2hw(int db)
 {
     /* 0 to -63.0dB in 1dB steps, tsc2100 can goto -63.5 in 0.5dB steps */
-    if (db < VOLUME_MIN) {
+    if (db <= -640) {
         return 0x7E;
-    } else if (db >= VOLUME_MAX) {
+    } else if (db >= 0) {
         return 0x00;
     } else {
-        return(-((db)/5)); /* VOLUME_MIN is negative */
+        return(-((db)/5));
     }
 }
 
diff --git a/firmware/drivers/audio/uda1341.c b/firmware/drivers/audio/uda1341.c
index e15cd39..7557310 100644
--- a/firmware/drivers/audio/uda1341.c
+++ b/firmware/drivers/audio/uda1341.c
@@ -31,7 +31,7 @@
 /* convert tenth of dB volume (-600..0) to volume register value */
 static int vol_tenthdb2hw(int db)
 {
-    if (db < -600) 
+    if (db <= -610) 
         return 63;
     else                            /* 1 dB steps */
         return -(db / 10) + 1;
diff --git a/firmware/drivers/audio/wm8731.c b/firmware/drivers/audio/wm8731.c
index f84edc5..5c1e623 100644
--- a/firmware/drivers/audio/wm8731.c
+++ b/firmware/drivers/audio/wm8731.c
@@ -101,7 +101,7 @@ static int vol_tenthdb2hw(int db)
     /* 1111001 ==   0dB (0x79) */
     /* 0110000 == -73dB (0x30) */
     /* 0101111 ==  mute (0x2f) */
-    if (db < VOLUME_MIN) {
+    if (db <= -740) {
         return 0x2f;
     } else {
         return((db/10)+0x30+73);
diff --git a/firmware/drivers/audio/wm8751.c b/firmware/drivers/audio/wm8751.c
index feba05e..476c6c3 100644
--- a/firmware/drivers/audio/wm8751.c
+++ b/firmware/drivers/audio/wm8751.c
@@ -117,7 +117,7 @@ static int vol_tenthdb2hw(int db)
     /* 1111001 ==   0dB  (0x79)                            */
     /* 0110000 == -73dB  (0x30)                            */
     /* 0101111..0000000 == mute  (<= 0x2f)                 */
-    if (db < VOLUME_MIN)
+    if (db <= -740)
         return 0x0;
     else
         return (db / 10) + 73 + 0x30;
diff --git a/firmware/drivers/audio/wm8758.c b/firmware/drivers/audio/wm8758.c
index 3f3ac79..f7d7a5b 100644
--- a/firmware/drivers/audio/wm8758.c
+++ b/firmware/drivers/audio/wm8758.c
@@ -38,7 +38,7 @@ static unsigned short eq1_reg = EQ1_EQ3DMODE | EQ_GAIN_VALUE(0);
 static unsigned short eq5_reg = EQ_GAIN_VALUE(0);
 
 /* convert tenth of dB volume (-89..6) to master volume register value */
-int tenthdb2master(int db)
+static int vol_tenthdb2hw(int db)
 {
     /*   att  DAC  AMP  result
         +6dB    0   +6     96
@@ -47,10 +47,10 @@ int tenthdb2master(int db)
        -58dB   -1  -57     32
        -89dB  -32  -57      1
        -90dB  -oo  -oo      0 */
-    if (db < VOLUME_MIN) {
+    if (db <= -900) {
         return 0;
     } else {
-        return (db-VOLUME_MIN)/10 + 1;
+        return db / 10 - -90;
     }
 }
 
@@ -137,6 +137,10 @@ void audiohw_postinit(void)
 void audiohw_set_volume(int vol_l, int vol_r)
 {
     int dac_l, amp_l, dac_r, amp_r;
+
+    vol_l = vol_tenthdb2hw(vol_l);
+    vol_r = vol_tenthdb2hw(vol_r);
+
     get_volume_params(vol_l, &dac_l, &amp_l);
     get_volume_params(vol_r, &dac_r, &amp_r);
 
diff --git a/firmware/drivers/audio/wm8975.c b/firmware/drivers/audio/wm8975.c
index 4905445..931dae9 100644
--- a/firmware/drivers/audio/wm8975.c
+++ b/firmware/drivers/audio/wm8975.c
@@ -79,7 +79,7 @@ static int vol_tenthdb2hw(int db)
     /* 0110000 == -73dB (0x30 */
     /* 0101111..0000000 == mute  (0x2f) */
 
-    if (db < VOLUME_MIN) {
+    if (db <= -740) {
         return 0x0;
     } else {
         return((db/10)+73+0x30);
diff --git a/firmware/drivers/audio/wm8978.c b/firmware/drivers/audio/wm8978.c
index 3a86ef2..69ae608 100644
--- a/firmware/drivers/audio/wm8978.c
+++ b/firmware/drivers/audio/wm8978.c
@@ -155,20 +155,17 @@ static void wmc_write_masked(unsigned int reg, unsigned int bits,
  * (000000...111111) */
 static int vol_tenthdb2hw(int db)
 {
-    /* -90dB to +6dB 1dB steps (96 levels) 7bits */
-    /* 1100000 ==  +6dB  (0x60,96)               */
-    /* 1101010 ==   0dB  (0x5a,90)               */
-    /* 1000001 == -57dB  (0x21,33,DAC)           */
-    /* 0000001 == -89dB  (0x01,01)               */
-    /* 0000000 == -90dB  (0x00,00,Mute)          */
-    if (db < VOLUME_MIN)
-    {
+    /*   att  DAC  AMP  result
+        +6dB    0   +6     96
+         0dB    0    0     90
+       -57dB    0  -57     33
+       -58dB   -1  -57     32
+       -89dB  -32  -57      1
+       -90dB  -oo  -oo      0 */
+    if (db <= -900)
         return 0x0;
-    }
     else
-    {
-        return (db - VOLUME_MIN) / 10;
-    }
+        return db / 10 - -90;
 }
 
 void audiohw_preinit(void)
diff --git a/firmware/drivers/audio/wm8985.c b/firmware/drivers/audio/wm8985.c
index 2d49e70..fab7354 100644
--- a/firmware/drivers/audio/wm8985.c
+++ b/firmware/drivers/audio/wm8985.c
@@ -104,10 +104,10 @@ static int vol_tenthdb2hw(int db)
         -89dB  -32  -57      1
         -90dB  -oo  -oo      0 */
 
-    if (db < VOLUME_MIN) {
+    if (db <= -900) {
         return 0;
     } else {
-        return (db-VOLUME_MIN)/10 + 1;
+        return db / 10 - -90;
     }
 }