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83c9f4ca79
Done with this script: cd hw for i in `find . -name '*.h' | sed 's/^..//'`; do echo '\,^#.*include.*["<]'$i'[">], s,'$i',hw/&,' done | sed -i -f - `find . -type f` This is so that paths remain valid as files are moved. Instead, files in hw/dataplane are referenced with the relative path. We know they are not going to move to include/, and they are the only include files that are in subdirectories _and_ move. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
336 lines
9 KiB
C
336 lines
9 KiB
C
/*
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* LM4549 Audio Codec Interface
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*
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* Copyright (c) 2011
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* Written by Mathieu Sonet - www.elasticsheep.com
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*
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* This code is licensed under the GPL.
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*
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* *****************************************************************
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*
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* This driver emulates the LM4549 codec.
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*
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* It supports only one playback voice and no record voice.
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*/
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#include "hw/hw.h"
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#include "audio/audio.h"
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#include "hw/lm4549.h"
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#if 0
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#define LM4549_DEBUG 1
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#endif
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#if 0
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#define LM4549_DUMP_DAC_INPUT 1
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#endif
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#ifdef LM4549_DEBUG
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#define DPRINTF(fmt, ...) \
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do { printf("lm4549: " fmt , ## __VA_ARGS__); } while (0)
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#else
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#define DPRINTF(fmt, ...) do {} while (0)
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#endif
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#if defined(LM4549_DUMP_DAC_INPUT)
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#include <stdio.h>
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static FILE *fp_dac_input;
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#endif
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/* LM4549 register list */
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enum {
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LM4549_Reset = 0x00,
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LM4549_Master_Volume = 0x02,
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LM4549_Line_Out_Volume = 0x04,
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LM4549_Master_Volume_Mono = 0x06,
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LM4549_PC_Beep_Volume = 0x0A,
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LM4549_Phone_Volume = 0x0C,
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LM4549_Mic_Volume = 0x0E,
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LM4549_Line_In_Volume = 0x10,
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LM4549_CD_Volume = 0x12,
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LM4549_Video_Volume = 0x14,
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LM4549_Aux_Volume = 0x16,
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LM4549_PCM_Out_Volume = 0x18,
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LM4549_Record_Select = 0x1A,
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LM4549_Record_Gain = 0x1C,
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LM4549_General_Purpose = 0x20,
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LM4549_3D_Control = 0x22,
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LM4549_Powerdown_Ctrl_Stat = 0x26,
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LM4549_Ext_Audio_ID = 0x28,
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LM4549_Ext_Audio_Stat_Ctrl = 0x2A,
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LM4549_PCM_Front_DAC_Rate = 0x2C,
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LM4549_PCM_ADC_Rate = 0x32,
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LM4549_Vendor_ID1 = 0x7C,
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LM4549_Vendor_ID2 = 0x7E
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};
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static void lm4549_reset(lm4549_state *s)
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{
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uint16_t *regfile = s->regfile;
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regfile[LM4549_Reset] = 0x0d50;
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regfile[LM4549_Master_Volume] = 0x8008;
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regfile[LM4549_Line_Out_Volume] = 0x8000;
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regfile[LM4549_Master_Volume_Mono] = 0x8000;
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regfile[LM4549_PC_Beep_Volume] = 0x0000;
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regfile[LM4549_Phone_Volume] = 0x8008;
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regfile[LM4549_Mic_Volume] = 0x8008;
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regfile[LM4549_Line_In_Volume] = 0x8808;
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regfile[LM4549_CD_Volume] = 0x8808;
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regfile[LM4549_Video_Volume] = 0x8808;
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regfile[LM4549_Aux_Volume] = 0x8808;
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regfile[LM4549_PCM_Out_Volume] = 0x8808;
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regfile[LM4549_Record_Select] = 0x0000;
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regfile[LM4549_Record_Gain] = 0x8000;
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regfile[LM4549_General_Purpose] = 0x0000;
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regfile[LM4549_3D_Control] = 0x0101;
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regfile[LM4549_Powerdown_Ctrl_Stat] = 0x000f;
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regfile[LM4549_Ext_Audio_ID] = 0x0001;
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regfile[LM4549_Ext_Audio_Stat_Ctrl] = 0x0000;
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regfile[LM4549_PCM_Front_DAC_Rate] = 0xbb80;
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regfile[LM4549_PCM_ADC_Rate] = 0xbb80;
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regfile[LM4549_Vendor_ID1] = 0x4e53;
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regfile[LM4549_Vendor_ID2] = 0x4331;
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}
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static void lm4549_audio_transfer(lm4549_state *s)
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{
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uint32_t written_bytes, written_samples;
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uint32_t i;
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/* Activate the voice */
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AUD_set_active_out(s->voice, 1);
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s->voice_is_active = 1;
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/* Try to write the buffer content */
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written_bytes = AUD_write(s->voice, s->buffer,
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s->buffer_level * sizeof(uint16_t));
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written_samples = written_bytes >> 1;
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#if defined(LM4549_DUMP_DAC_INPUT)
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fwrite(s->buffer, sizeof(uint8_t), written_bytes, fp_dac_input);
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#endif
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s->buffer_level -= written_samples;
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if (s->buffer_level > 0) {
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/* Move the data back to the start of the buffer */
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for (i = 0; i < s->buffer_level; i++) {
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s->buffer[i] = s->buffer[i + written_samples];
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}
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}
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}
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static void lm4549_audio_out_callback(void *opaque, int free)
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{
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lm4549_state *s = (lm4549_state *)opaque;
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static uint32_t prev_buffer_level;
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#ifdef LM4549_DEBUG
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int size = AUD_get_buffer_size_out(s->voice);
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DPRINTF("audio_out_callback size = %i free = %i\n", size, free);
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#endif
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/* Detect that no data are consumed
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=> disable the voice */
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if (s->buffer_level == prev_buffer_level) {
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AUD_set_active_out(s->voice, 0);
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s->voice_is_active = 0;
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}
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prev_buffer_level = s->buffer_level;
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/* Check if a buffer transfer is pending */
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if (s->buffer_level == LM4549_BUFFER_SIZE) {
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lm4549_audio_transfer(s);
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/* Request more data */
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if (s->data_req_cb != NULL) {
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(s->data_req_cb)(s->opaque);
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}
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}
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}
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uint32_t lm4549_read(lm4549_state *s, hwaddr offset)
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{
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uint16_t *regfile = s->regfile;
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uint32_t value = 0;
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/* Read the stored value */
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assert(offset < 128);
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value = regfile[offset];
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DPRINTF("read [0x%02x] = 0x%04x\n", offset, value);
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return value;
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}
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void lm4549_write(lm4549_state *s,
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hwaddr offset, uint32_t value)
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{
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uint16_t *regfile = s->regfile;
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assert(offset < 128);
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DPRINTF("write [0x%02x] = 0x%04x\n", offset, value);
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switch (offset) {
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case LM4549_Reset:
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lm4549_reset(s);
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break;
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case LM4549_PCM_Front_DAC_Rate:
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regfile[LM4549_PCM_Front_DAC_Rate] = value;
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DPRINTF("DAC rate change = %i\n", value);
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/* Re-open a voice with the new sample rate */
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struct audsettings as;
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as.freq = value;
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as.nchannels = 2;
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as.fmt = AUD_FMT_S16;
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as.endianness = 0;
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s->voice = AUD_open_out(
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&s->card,
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s->voice,
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"lm4549.out",
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s,
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lm4549_audio_out_callback,
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&as
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);
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break;
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case LM4549_Powerdown_Ctrl_Stat:
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value &= ~0xf;
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value |= regfile[LM4549_Powerdown_Ctrl_Stat] & 0xf;
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regfile[LM4549_Powerdown_Ctrl_Stat] = value;
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break;
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case LM4549_Ext_Audio_ID:
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case LM4549_Vendor_ID1:
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case LM4549_Vendor_ID2:
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DPRINTF("Write to read-only register 0x%x\n", (int)offset);
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break;
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default:
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/* Store the new value */
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regfile[offset] = value;
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break;
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}
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}
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uint32_t lm4549_write_samples(lm4549_state *s, uint32_t left, uint32_t right)
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{
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/* The left and right samples are in 20-bit resolution.
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The LM4549 has 18-bit resolution and only uses the bits [19:2].
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This model supports 16-bit playback.
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*/
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if (s->buffer_level > LM4549_BUFFER_SIZE - 2) {
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DPRINTF("write_sample Buffer full\n");
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return 0;
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}
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/* Store 16-bit samples in the buffer */
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s->buffer[s->buffer_level++] = (left >> 4);
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s->buffer[s->buffer_level++] = (right >> 4);
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if (s->buffer_level == LM4549_BUFFER_SIZE) {
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/* Trigger the transfer of the buffer to the audio host */
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lm4549_audio_transfer(s);
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}
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return 1;
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}
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static int lm4549_post_load(void *opaque, int version_id)
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{
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lm4549_state *s = (lm4549_state *)opaque;
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uint16_t *regfile = s->regfile;
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/* Re-open a voice with the current sample rate */
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uint32_t freq = regfile[LM4549_PCM_Front_DAC_Rate];
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DPRINTF("post_load freq = %i\n", freq);
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DPRINTF("post_load voice_is_active = %i\n", s->voice_is_active);
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struct audsettings as;
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as.freq = freq;
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as.nchannels = 2;
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as.fmt = AUD_FMT_S16;
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as.endianness = 0;
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s->voice = AUD_open_out(
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&s->card,
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s->voice,
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"lm4549.out",
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s,
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lm4549_audio_out_callback,
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&as
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);
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/* Request data */
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if (s->voice_is_active == 1) {
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lm4549_audio_out_callback(s, AUD_get_buffer_size_out(s->voice));
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}
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return 0;
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}
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void lm4549_init(lm4549_state *s, lm4549_callback data_req_cb, void* opaque)
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{
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struct audsettings as;
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/* Store the callback and opaque pointer */
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s->data_req_cb = data_req_cb;
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s->opaque = opaque;
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/* Init the registers */
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lm4549_reset(s);
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/* Register an audio card */
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AUD_register_card("lm4549", &s->card);
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/* Open a default voice */
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as.freq = 48000;
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as.nchannels = 2;
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as.fmt = AUD_FMT_S16;
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as.endianness = 0;
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s->voice = AUD_open_out(
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&s->card,
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s->voice,
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"lm4549.out",
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s,
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lm4549_audio_out_callback,
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&as
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);
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AUD_set_volume_out(s->voice, 0, 255, 255);
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s->voice_is_active = 0;
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/* Reset the input buffer */
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memset(s->buffer, 0x00, sizeof(s->buffer));
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s->buffer_level = 0;
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#if defined(LM4549_DUMP_DAC_INPUT)
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fp_dac_input = fopen("lm4549_dac_input.pcm", "wb");
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if (!fp_dac_input) {
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hw_error("Unable to open lm4549_dac_input.pcm for writing\n");
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}
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#endif
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}
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const VMStateDescription vmstate_lm4549_state = {
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.name = "lm4549_state",
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.version_id = 1,
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.minimum_version_id = 1,
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.minimum_version_id_old = 1,
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.post_load = &lm4549_post_load,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32(voice_is_active, lm4549_state),
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VMSTATE_UINT16_ARRAY(regfile, lm4549_state, 128),
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VMSTATE_UINT16_ARRAY(buffer, lm4549_state, LM4549_BUFFER_SIZE),
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VMSTATE_UINT32(buffer_level, lm4549_state),
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VMSTATE_END_OF_LIST()
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}
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};
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