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-rw-r--r--hw/lm4549.c336
1 files changed, 0 insertions, 336 deletions
diff --git a/hw/lm4549.c b/hw/lm4549.c
deleted file mode 100644
index 67335cba61..0000000000
--- a/hw/lm4549.c
+++ /dev/null
@@ -1,336 +0,0 @@
-/*
- * LM4549 Audio Codec Interface
- *
- * Copyright (c) 2011
- * Written by Mathieu Sonet - www.elasticsheep.com
- *
- * This code is licensed under the GPL.
- *
- * *****************************************************************
- *
- * This driver emulates the LM4549 codec.
- *
- * It supports only one playback voice and no record voice.
- */
-
-#include "hw/hw.h"
-#include "audio/audio.h"
-#include "hw/lm4549.h"
-
-#if 0
-#define LM4549_DEBUG 1
-#endif
-
-#if 0
-#define LM4549_DUMP_DAC_INPUT 1
-#endif
-
-#ifdef LM4549_DEBUG
-#define DPRINTF(fmt, ...) \
-do { printf("lm4549: " fmt , ## __VA_ARGS__); } while (0)
-#else
-#define DPRINTF(fmt, ...) do {} while (0)
-#endif
-
-#if defined(LM4549_DUMP_DAC_INPUT)
-#include <stdio.h>
-static FILE *fp_dac_input;
-#endif
-
-/* LM4549 register list */
-enum {
- LM4549_Reset = 0x00,
- LM4549_Master_Volume = 0x02,
- LM4549_Line_Out_Volume = 0x04,
- LM4549_Master_Volume_Mono = 0x06,
- LM4549_PC_Beep_Volume = 0x0A,
- LM4549_Phone_Volume = 0x0C,
- LM4549_Mic_Volume = 0x0E,
- LM4549_Line_In_Volume = 0x10,
- LM4549_CD_Volume = 0x12,
- LM4549_Video_Volume = 0x14,
- LM4549_Aux_Volume = 0x16,
- LM4549_PCM_Out_Volume = 0x18,
- LM4549_Record_Select = 0x1A,
- LM4549_Record_Gain = 0x1C,
- LM4549_General_Purpose = 0x20,
- LM4549_3D_Control = 0x22,
- LM4549_Powerdown_Ctrl_Stat = 0x26,
- LM4549_Ext_Audio_ID = 0x28,
- LM4549_Ext_Audio_Stat_Ctrl = 0x2A,
- LM4549_PCM_Front_DAC_Rate = 0x2C,
- LM4549_PCM_ADC_Rate = 0x32,
- LM4549_Vendor_ID1 = 0x7C,
- LM4549_Vendor_ID2 = 0x7E
-};
-
-static void lm4549_reset(lm4549_state *s)
-{
- uint16_t *regfile = s->regfile;
-
- regfile[LM4549_Reset] = 0x0d50;
- regfile[LM4549_Master_Volume] = 0x8008;
- regfile[LM4549_Line_Out_Volume] = 0x8000;
- regfile[LM4549_Master_Volume_Mono] = 0x8000;
- regfile[LM4549_PC_Beep_Volume] = 0x0000;
- regfile[LM4549_Phone_Volume] = 0x8008;
- regfile[LM4549_Mic_Volume] = 0x8008;
- regfile[LM4549_Line_In_Volume] = 0x8808;
- regfile[LM4549_CD_Volume] = 0x8808;
- regfile[LM4549_Video_Volume] = 0x8808;
- regfile[LM4549_Aux_Volume] = 0x8808;
- regfile[LM4549_PCM_Out_Volume] = 0x8808;
- regfile[LM4549_Record_Select] = 0x0000;
- regfile[LM4549_Record_Gain] = 0x8000;
- regfile[LM4549_General_Purpose] = 0x0000;
- regfile[LM4549_3D_Control] = 0x0101;
- regfile[LM4549_Powerdown_Ctrl_Stat] = 0x000f;
- regfile[LM4549_Ext_Audio_ID] = 0x0001;
- regfile[LM4549_Ext_Audio_Stat_Ctrl] = 0x0000;
- regfile[LM4549_PCM_Front_DAC_Rate] = 0xbb80;
- regfile[LM4549_PCM_ADC_Rate] = 0xbb80;
- regfile[LM4549_Vendor_ID1] = 0x4e53;
- regfile[LM4549_Vendor_ID2] = 0x4331;
-}
-
-static void lm4549_audio_transfer(lm4549_state *s)
-{
- uint32_t written_bytes, written_samples;
- uint32_t i;
-
- /* Activate the voice */
- AUD_set_active_out(s->voice, 1);
- s->voice_is_active = 1;
-
- /* Try to write the buffer content */
- written_bytes = AUD_write(s->voice, s->buffer,
- s->buffer_level * sizeof(uint16_t));
- written_samples = written_bytes >> 1;
-
-#if defined(LM4549_DUMP_DAC_INPUT)
- fwrite(s->buffer, sizeof(uint8_t), written_bytes, fp_dac_input);
-#endif
-
- s->buffer_level -= written_samples;
-
- if (s->buffer_level > 0) {
- /* Move the data back to the start of the buffer */
- for (i = 0; i < s->buffer_level; i++) {
- s->buffer[i] = s->buffer[i + written_samples];
- }
- }
-}
-
-static void lm4549_audio_out_callback(void *opaque, int free)
-{
- lm4549_state *s = (lm4549_state *)opaque;
- static uint32_t prev_buffer_level;
-
-#ifdef LM4549_DEBUG
- int size = AUD_get_buffer_size_out(s->voice);
- DPRINTF("audio_out_callback size = %i free = %i\n", size, free);
-#endif
-
- /* Detect that no data are consumed
- => disable the voice */
- if (s->buffer_level == prev_buffer_level) {
- AUD_set_active_out(s->voice, 0);
- s->voice_is_active = 0;
- }
- prev_buffer_level = s->buffer_level;
-
- /* Check if a buffer transfer is pending */
- if (s->buffer_level == LM4549_BUFFER_SIZE) {
- lm4549_audio_transfer(s);
-
- /* Request more data */
- if (s->data_req_cb != NULL) {
- (s->data_req_cb)(s->opaque);
- }
- }
-}
-
-uint32_t lm4549_read(lm4549_state *s, hwaddr offset)
-{
- uint16_t *regfile = s->regfile;
- uint32_t value = 0;
-
- /* Read the stored value */
- assert(offset < 128);
- value = regfile[offset];
-
- DPRINTF("read [0x%02x] = 0x%04x\n", offset, value);
-
- return value;
-}
-
-void lm4549_write(lm4549_state *s,
- hwaddr offset, uint32_t value)
-{
- uint16_t *regfile = s->regfile;
-
- assert(offset < 128);
- DPRINTF("write [0x%02x] = 0x%04x\n", offset, value);
-
- switch (offset) {
- case LM4549_Reset:
- lm4549_reset(s);
- break;
-
- case LM4549_PCM_Front_DAC_Rate:
- regfile[LM4549_PCM_Front_DAC_Rate] = value;
- DPRINTF("DAC rate change = %i\n", value);
-
- /* Re-open a voice with the new sample rate */
- struct audsettings as;
- as.freq = value;
- as.nchannels = 2;
- as.fmt = AUD_FMT_S16;
- as.endianness = 0;
-
- s->voice = AUD_open_out(
- &s->card,
- s->voice,
- "lm4549.out",
- s,
- lm4549_audio_out_callback,
- &as
- );
- break;
-
- case LM4549_Powerdown_Ctrl_Stat:
- value &= ~0xf;
- value |= regfile[LM4549_Powerdown_Ctrl_Stat] & 0xf;
- regfile[LM4549_Powerdown_Ctrl_Stat] = value;
- break;
-
- case LM4549_Ext_Audio_ID:
- case LM4549_Vendor_ID1:
- case LM4549_Vendor_ID2:
- DPRINTF("Write to read-only register 0x%x\n", (int)offset);
- break;
-
- default:
- /* Store the new value */
- regfile[offset] = value;
- break;
- }
-}
-
-uint32_t lm4549_write_samples(lm4549_state *s, uint32_t left, uint32_t right)
-{
- /* The left and right samples are in 20-bit resolution.
- The LM4549 has 18-bit resolution and only uses the bits [19:2].
- This model supports 16-bit playback.
- */
-
- if (s->buffer_level > LM4549_BUFFER_SIZE - 2) {
- DPRINTF("write_sample Buffer full\n");
- return 0;
- }
-
- /* Store 16-bit samples in the buffer */
- s->buffer[s->buffer_level++] = (left >> 4);
- s->buffer[s->buffer_level++] = (right >> 4);
-
- if (s->buffer_level == LM4549_BUFFER_SIZE) {
- /* Trigger the transfer of the buffer to the audio host */
- lm4549_audio_transfer(s);
- }
-
- return 1;
-}
-
-static int lm4549_post_load(void *opaque, int version_id)
-{
- lm4549_state *s = (lm4549_state *)opaque;
- uint16_t *regfile = s->regfile;
-
- /* Re-open a voice with the current sample rate */
- uint32_t freq = regfile[LM4549_PCM_Front_DAC_Rate];
-
- DPRINTF("post_load freq = %i\n", freq);
- DPRINTF("post_load voice_is_active = %i\n", s->voice_is_active);
-
- struct audsettings as;
- as.freq = freq;
- as.nchannels = 2;
- as.fmt = AUD_FMT_S16;
- as.endianness = 0;
-
- s->voice = AUD_open_out(
- &s->card,
- s->voice,
- "lm4549.out",
- s,
- lm4549_audio_out_callback,
- &as
- );
-
- /* Request data */
- if (s->voice_is_active == 1) {
- lm4549_audio_out_callback(s, AUD_get_buffer_size_out(s->voice));
- }
-
- return 0;
-}
-
-void lm4549_init(lm4549_state *s, lm4549_callback data_req_cb, void* opaque)
-{
- struct audsettings as;
-
- /* Store the callback and opaque pointer */
- s->data_req_cb = data_req_cb;
- s->opaque = opaque;
-
- /* Init the registers */
- lm4549_reset(s);
-
- /* Register an audio card */
- AUD_register_card("lm4549", &s->card);
-
- /* Open a default voice */
- as.freq = 48000;
- as.nchannels = 2;
- as.fmt = AUD_FMT_S16;
- as.endianness = 0;
-
- s->voice = AUD_open_out(
- &s->card,
- s->voice,
- "lm4549.out",
- s,
- lm4549_audio_out_callback,
- &as
- );
-
- AUD_set_volume_out(s->voice, 0, 255, 255);
-
- s->voice_is_active = 0;
-
- /* Reset the input buffer */
- memset(s->buffer, 0x00, sizeof(s->buffer));
- s->buffer_level = 0;
-
-#if defined(LM4549_DUMP_DAC_INPUT)
- fp_dac_input = fopen("lm4549_dac_input.pcm", "wb");
- if (!fp_dac_input) {
- hw_error("Unable to open lm4549_dac_input.pcm for writing\n");
- }
-#endif
-}
-
-const VMStateDescription vmstate_lm4549_state = {
- .name = "lm4549_state",
- .version_id = 1,
- .minimum_version_id = 1,
- .minimum_version_id_old = 1,
- .post_load = &lm4549_post_load,
- .fields = (VMStateField[]) {
- VMSTATE_UINT32(voice_is_active, lm4549_state),
- VMSTATE_UINT16_ARRAY(regfile, lm4549_state, 128),
- VMSTATE_UINT16_ARRAY(buffer, lm4549_state, LM4549_BUFFER_SIZE),
- VMSTATE_UINT32(buffer_level, lm4549_state),
- VMSTATE_END_OF_LIST()
- }
-};
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