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Diffstat (limited to 'firmware/drivers/audio/as3514.c')
-rw-r--r--firmware/drivers/audio/as3514.c17
1 files changed, 13 insertions, 4 deletions
diff --git a/firmware/drivers/audio/as3514.c b/firmware/drivers/audio/as3514.c
index e1c7f6575e..1f79277423 100644
--- a/firmware/drivers/audio/as3514.c
+++ b/firmware/drivers/audio/as3514.c
@@ -31,6 +31,16 @@
31#include "i2s.h" 31#include "i2s.h"
32#include "ascodec.h" 32#include "ascodec.h"
33 33
34#if CONFIG_CPU == AS3525v2
35/* Headphone volume goes from -81.0 ... +6dB */
36#define VOLUME_MIN -820
37#define VOLUME_MAX 60
38#else
39/* Headphone volume goes from -73.5 ... +6dB */
40#define VOLUME_MIN -740
41#define VOLUME_MAX 60
42#endif
43
34/* 44/*
35 * This drivers supports: 45 * This drivers supports:
36 * as3514 , as used in the PP targets 46 * as3514 , as used in the PP targets
@@ -99,13 +109,12 @@ static void as3514_write_masked(unsigned int reg, unsigned int bits,
99/* convert tenth of dB volume to master volume register value */ 109/* convert tenth of dB volume to master volume register value */
100static int vol_tenthdb2hw(int db) 110static int vol_tenthdb2hw(int db)
101{ 111{
102 /* +6 to -73.5dB (or -81.0 dB) in 1.5dB steps == 53 (or 58) levels */ 112 if (db <= VOLUME_MIN) {
103 if (db < VOLUME_MIN) {
104 return 0x0; 113 return 0x0;
105 } else if (db > VOLUME_MAX) { 114 } else if (db > VOLUME_MAX) {
106 return (VOLUME_MAX-VOLUME_MIN)/15; 115 return (VOLUME_MAX - VOLUME_MIN) / 15;
107 } else { 116 } else {
108 return((db-VOLUME_MIN)/15); /* VOLUME_MIN is negative */ 117 return (db - VOLUME_MIN) / 15;
109 } 118 }
110} 119}
111 120