Add stubs for missing AWACS regs

Author: dingusdev

devices/sound/awacs.cpp

@@ -192,6 +192,8 @@ uint32_t AwacsScreamer::snd_ctrl_read(uint32_t offset, int size) {
         return this->is_busy;
     case AWAC_CODEC_STATUS_REG:
         return (AWAC_AVAILABLE << 8) | (AWAC_MAKER_CRYSTAL << 16) | (AWAC_REV_SCREAMER << 20);
+    case AWAC_CLIP_COUNT:
+        return this->clip_count;
     default:
         LOG_F(ERROR, "%s: unsupported register at offset 0x%X", this->name.c_str(), offset);
     }
@@ -217,6 +219,8 @@ void AwacsScreamer::snd_ctrl_write(uint32_t offset, uint32_t value, int size) {
         if (!subframe)
             this->control_regs[reg_num] = data;
         break;
+    case AWAC_CLIP_COUNT:
+        this->clip_count = BYTESWAP_32(value);
     default:
         LOG_F(ERROR, "%s: unsupported register at offset 0x%X", this->name.c_str(),
               offset);

devices/sound/awacs.h

@@ -95,6 +95,8 @@ enum {
     AWAC_SOUND_CTRL_REG   = 0x00,
     AWAC_CODEC_CTRL_REG   = 0x10,
     AWAC_CODEC_STATUS_REG = 0x20,
+    AWAC_CLIP_COUNT       = 0x30,
+    AWAC_BYTE_SWAP        = 0x40,
 };
 
 /** Apple source calls this kValidData but doesn't explain
@@ -185,7 +187,8 @@ class AwacsScreamer : public MacioSndCodec {
 private:
     uint32_t snd_ctrl_reg    = 0;
     uint16_t control_regs[8] = {}; // control registers, each 12-bits wide
-    uint8_t  is_busy         = 0;
+    uint8_t is_busy          = 0;
+    uint32_t clip_count      = 0;
 
     std::unique_ptr<AudioProcessor> audio_proc;
 };