/*
* QEMU Crystal CS4231 audio chip emulation
*
* Copyright (c) 2006 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "hw.h"
#include "audiodev.h"
#include "audio/audio.h"
#include "isa.h"
#include "qemu-timer.h"
/*
Missing features:
ADC
Loopback
Timer
ADPCM
More...
*/
/* #define DEBUG */
/* #define DEBUG_XLAW */
static struct {
int irq;
int dma;
int port;
int aci_counter;
} conf = {9, 3, 0x534, 1};
#ifdef DEBUG
#define dolog(...) AUD_log ("cs4231a", __VA_ARGS__)
#else
#define dolog(...)
#endif
#define lwarn(...) AUD_log ("cs4231a", "warning: " __VA_ARGS__)
#define lerr(...) AUD_log ("cs4231a", "error: " __VA_ARGS__)
#define CS_REGS 16
#define CS_DREGS 32
typedef struct CSState {
QEMUSoundCard card;
qemu_irq *pic;
uint32_t regs[CS_REGS];
uint8_t dregs[CS_DREGS];
int irq;
int dma;
int port;
int shift;
int dma_running;
int audio_free;
int transferred;
int aci_counter;
SWVoiceOut *voice;
int16_t *tab;
} CSState;
#define IO_READ_PROTO(name) \
static uint32_t name (void *opaque, uint32_t addr)
#define IO_WRITE_PROTO(name) \
static void name (void *opaque, uint32_t addr, uint32_t val)
#define GET_SADDR(addr) (addr & 3)
#define MODE2 (1 << 6)
#define MCE (1 << 6)
#define PMCE (1 << 4)
#define CMCE (1 << 5)
#define TE (1 << 6)
#define PEN (1 << 0)
#define INT (1 << 0)
#define IEN (1 << 1)
#define PPIO (1 << 6)
#define PI (1 << 4)
#define CI (1 << 5)
#define TI (1 << 6)
enum {
Index_Address,
Index_Data,
Status,
PIO_Data
};
enum {
Left_ADC_Input_Control,
Right_ADC_Input_Control,
Left_AUX1_Input_Control,
Right_AUX1_Input_Control,
Left_AUX2_Input_Control,
Right_AUX2_Input_Control,
Left_DAC_Output_Control,
Right_DAC_Output_Control,
FS_And_Playback_Data_Format,
Interface_Configuration,
Pin_Control,
Error_Status_And_Initialization,
MODE_And_ID,
Loopback_Control,
Playback_Upper_Base_Count,
Playback_Lower_Base_Count,
Alternate_Feature_Enable_I,
Alternate_Feature_Enable_II,
Left_Line_Input_Control,
Right_Line_Input_Control,
Timer_Low_Base,
Timer_High_Base,
RESERVED,
Alternate_Feature_Enable_III,
Alternate_Feature_Status,
Version_Chip_ID,
Mono_Input_And_Output_Control,
RESERVED_2,
Capture_Data_Format,
RESERVED_3,
Capture_Upper_Base_Count,
Capture_Lower_Base_Count
};
static int freqs[2][8] = {
{ 8000, 16000, 27420, 32000, -1, -1, 48000, 9000 },
{ 5510, 11025, 18900, 22050, 37800, 44100, 33075, 6620 }
};
/* Tables courtesy http://hazelware.luggle.com/tutorials/mulawcompression.html */
static int16_t MuLawDecompressTable[256] =
{
-32124,-31100,-30076,-29052,-28028,-27004,-25980,-24956,
-23932,-22908,-21884,-20860,-19836,-18812,-17788,-16764,
-15996,-15484,-14972,-14460,-13948,-13436,-12924,-12412,
-11900,-11388,-10876,-10364, -9852, -9340, -8828, -8316,
-7932, -7676, -7420, -7164, -6908, -6652, -6396, -6140,
-5884, -5628, -5372, -5116, -4860, -4604, -4348, -4092,
-3900, -3772, -3644, -3516, -3388, -3260, -3132, -3004,
-2876, -2748, -2620, -2492, -2364, -2236, -2108, -1980,
-1884, -1820, -1756, -1692, -1628, -1564, -1500, -1436,
-1372, -1308, -1244, -1180, -1116, -1052, -988, -924,
-876, -844, -812, -780, -748, -716, -684, -652,
-620, -588, -556, -524, -492, -460, -428, -396,
-372, -356, -340, -324, -308, -292, -276, -260,
-244, -228, -212, -196, -180, -164, -148, -132,
-120, -112, -104, -96, -88, -80, -72, -64,
-56, -48, -40, -32, -24, -16, -8, 0,
32124, 31100, 30076, 29052, 28028, 27004, 25980, 24956,
23932, 22908, 21884, 20860, 19836, 18812, 17788, 16764,
15996, 15484, 14972, 14460, 13948, 13436, 12924, 12412,
11900, 11388, 10876, 10364, 9852, 9340, 8828, 8316,
7932, 7676, 7420, 7164, 6908, 6652, 6396, 6140,
5884, 5628, 5372, 5116, 4860, 4604, 4348, 4092,
3900, 3772, 3644, 3516, 3388, 3260, 3132, 3004,
2876, 2748, 2620, 2492, 2364, 2236, 2108, 1980,
1884, 1820, 1756, 1692, 1628, 1564, 1500, 1436,
1372, 1308, 1244, 1180, 1116, 1052, 988, 924,
876, 844, 812, 780, 748, 716, 684, 652,
620, 588, 556, 524, 492, 460, 428, 396,
372, 356, 340, 324, 308, 292, 276, 260,
244, 228, 212, 196, 180, 164, 148, 132,
120, 112, 104, 96, 88, 80, 72, 64,
56, 48, 40, 32, 24, 16, 8, 0
};
static int16_t ALawDecompressTable[256] =
{
-5504, -5248, -6016, -5760, -4480, -4224, -4992, -4736,
-7552, -7296, -8064, -7808, -6528, -6272, -7040, -6784,
-2752, -2624, -3008, -2880, -2240, -2112, -2496, -2368,
-3776, -3648, -4032, -3904, -3264, -3136, -3520, -3392,
-22016,-20992,-24064,-23040,-17920,-16896,-19968,-18944,
-30208,-29184,-32256,-31232,-26112,-25088,-28160,-27136,
-11008,-10496,-12032,-11520,-8960, -8448, -9984, -9472,
-15104,-14592,-16128,-15616,-13056,-12544,-14080,-13568,
-344, -328, -376, -360, -280, -264, -312, -296,
-472, -456, -504, -488, -408, -392, -440, -424,
-88, -72, -120, -104, -24, -8, -56, -40,
-216, -200, -248, -232, -152, -136, -184, -168,
-1376, -1312, -1504, -1440, -1120, -1056, -1248, -1184,
-1888, -1824, -2016, -1952, -1632, -1568, -1760, -1696,
-688, -656, -752, -720, -560, -528, -624, -592,
-944, -912, -1008, -976, -816, -784, -880, -848,
5504, 5248, 6016, 5760, 4480, 4224, 4992, 4736,
7552, 7296, 8064, 7808, 6528, 6272, 7040, 6784,
2752, 2624, 3008, 2880, 2240, 2112, 2496, 2368,
3776, 3648, 4032, 3904, 3264, 3136, 3520, 3392,
22016, 20992, 24064, 23040, 17920, 16896, 19968, 18944,
30208, 29184, 32256, 31232, 26112, 25088, 28160, 27136,
11008, 10496, 12032, 11520, 8960, 8448, 9984, 9472,
15104, 14592, 16128, 15616, 13056, 12544, 14080, 13568,
344, 328, 376, 360, 280, 264, 312, 296,
472, 456, 504, 488, 408, 392, 440, 424,
88, 72, 120, 104, 24, 8, 56, 40,
216, 200, 248, 232, 152, 136, 184, 168,
1376, 1312, 1504, 1440, 1120, 1056, 1248, 1184,
1888, 1824, 2016, 1952, 1632, 1568, 1760, 1696,
688, 656, 752, 720, 560, 528, 624, 592,
944, 912, 1008, 976, 816, 784, 880, 848
};
static void cs_reset(void *opaque)
{
CSState *s = opaque;
s->regs[Index_Address] = 0x40;
s->regs[Index_Data] = 0x00;
s->regs[Status] = 0x00;
s->regs[PIO_Data] = 0x00;
s->dregs[Left_ADC_Input_Control] = 0x00;
s->dregs[Right_ADC_Input_Control] = 0x00;
s->dregs[Left_AUX1_Input_Control] = 0x88;
s->dregs[Right_AUX1_Input_Control] = 0x88;
s->dregs[Left_AUX2_Input_Control] = 0x88;
s->dregs[Right_AUX2_Input_Control] = 0x88;
s->dregs[Left_DAC_Output_Control] = 0x80;
s->dregs[Right_DAC_Output_Control] = 0x80;
s->dregs[FS_And_Playback_Data_Format] = 0x00;
s->dregs[Interface_Configuration] = 0x08;
s->dregs[Pin_Control] = 0x00;
s->dregs[Error_Status_And_Initialization] = 0x00;
s->dregs[MODE_And_ID] = 0x8a;
s->dregs[Loopback_Control] = 0x00;
s->dregs[Playback_Upper_Base_Count] = 0x00;
s->dregs[Playback_Lower_Base_Count] = 0x00;
s->dregs[Alternate_Feature_Enable_I] = 0x00;
s->dregs[Alternate_Feature_Enable_II] = 0x00;
s->dregs[Left_Line_Input_Control] = 0x88;
s->dregs[Right_Line_Input_Control] = 0x88;
s->dregs[Timer_Low_Base] = 0x00;
s->dregs[Timer_High_Base] = 0x00;
s->dregs[RESERVED] = 0x00;
s->dregs[Alternate_Feature_Enable_III] = 0x00;
s->dregs[Alternate_Feature_Status] = 0x00;
s->dregs[Version_Chip_ID] = 0xa0;
s->dregs[Mono_Input_And_Output_Control] = 0xa0;
s->dregs[RESERVED_2] = 0x00;
s->dregs[Capture_Data_Format] = 0x00;
s->dregs[RESERVED_3] = 0x00;
s->dregs[Capture_Upper_Base_Count] = 0x00;
s->dregs[Capture_Lower_Base_Count] = 0x00;
}
static void cs_audio_callback (void *opaque, int free)
{
CSState *s = opaque;
s->audio_free = free;
}
static void cs_reset_voices (CSState *s, uint32_t val)
{
int xtal;
struct audsettings as;
#ifdef DEBUG_XLAW
if (val == 0 || val == 32)
val = (1 << 4) | (1 << 5);
#endif
xtal = val & 1;
as.freq = freqs[xtal][(val >> 1) & 7];
if (as.freq == -1) {
lerr ("unsupported frequency (val=%#x)\n", val);
goto error;
}
as.nchannels = (val & (1 << 4)) ? 2 : 1;
as.endianness = 0;
s->tab = NULL;
switch ((val >> 5) & ((s->dregs[MODE_And_ID] & MODE2) ? 7 : 3)) {
case 0:
as.fmt = AUD_FMT_U8;
s->shift = as.nchannels == 2;
break;
case 1:
s->tab = MuLawDecompressTable;
goto x_law;
case 3:
s->tab = ALawDecompressTable;
x_law:
as.fmt = AUD_FMT_S16;
as.endianness = AUDIO_HOST_ENDIANNESS;
s->shift = as.nchannels == 2;
break;
case 6:
as.endianness = 1;
case 2:
as.fmt = AUD_FMT_S16;
s->shift = as.nchannels;
break;
case 7:
case 4:
lerr ("attempt to use reserved format value (%#x)\n", val);
goto error;
case 5:
lerr ("ADPCM 4 bit IMA compatible format is not supported\n");
goto error;
}
s->voice = AUD_open_out (
&s->card,
s->voice,
"cs4231a",
s,
cs_audio_callback,
&as
);
if (s->dregs[Interface_Configuration] & PEN) {
if (!s->dma_running) {
DMA_hold_DREQ (s->dma);
AUD_set_active_out (s->voice, 1);
s->transferred = 0;
}
s->dma_running = 1;
}
else {
if (s->dma_running) {
DMA_release_DREQ (s->dma);
AUD_set_active_out (s->voice, 0);
}
s->dma_running = 0;
}
return;
error:
if (s->dma_running) {
DMA_release_DREQ (s->dma);
AUD_set_active_out (s->voice, 0);
}
}
IO_READ_PROTO (cs_read)
{
CSState *s = opaque;
uint32_t saddr, iaddr, ret;
saddr = GET_SADDR (addr);
iaddr = ~0U;
switch (saddr) {
case Index_Address:
ret = s->regs[saddr] & ~0x80;
break;
case Index_Data:
if (!(s->dregs[MODE_And_ID] & MODE2))
iaddr = s->regs[Index_Address] & 0x0f;
else
iaddr = s->regs[Index_Address] & 0x1f;
ret = s->dregs[iaddr];
if (iaddr == Error_Status_And_Initialization) {
/* keep SEAL happy */
if (s->aci_counter) {
ret |= 1 << 5;
s->aci_counter -= 1;
}
}
break;
default:
ret = s->regs[saddr];
break;
}
dolog ("read %d:%d -> %d\n", saddr, iaddr, ret);
return ret;
}
IO_WRITE_PROTO (cs_write)
{
CSState *s = opaque;
uint32_t saddr, iaddr;
saddr = GET_SADDR (addr);
switch (saddr) {
case Index_Address:
if (!(s->regs[Index_Address] & MCE) && (val & MCE)
&& (s->dregs[Interface_Configuration] & (3 << 3)))
s->aci_counter = conf.aci_counter;
s->regs[Index_Address] = val & ~(1 << 7);
break;
case Index_Data:
if (!(s->dregs[MODE_And_ID] & MODE2))
iaddr = s->regs[Index_Address] & 0x0f;
else
iaddr = s->regs[Index_Address] & 0x1f;
switch (iaddr) {
case RESERVED:
case RESERVED_2:
case RESERVED_3:
lwarn ("attempt to write %#x to reserved indirect register %d\n",
val, iaddr);
break;
case FS_And_Playback_Data_Format:
if (s->regs[Index_Address] & MCE) {
cs_reset_voices (s, val);
}
else {
if (s->dregs[Alternate_Feature_Status] & PMCE) {
val = (val & ~0x0f) | (s->dregs[iaddr] & 0x0f);
cs_reset_voices (s, val);
}
else {
lwarn ("[P]MCE(%#x, %#x) is not set, val=%#x\n",
s->regs[Index_Address],
s->dregs[Alternate_Feature_Status],
val);
break;
}
}
s->dregs[iaddr] = val;
break;
case Interface_Configuration:
val &= ~(1 << 5); /* D5 is reserved */
s->dregs[iaddr] = val;
if (val & PPIO) {
lwarn ("PIO is not supported (%#x)\n", val);
break;
}
if (val & PEN) {
if (!s->dma_running) {
cs_reset_voices (s, s->dregs[FS_And_Playback_Data_Format]);
}
}
else {
if (s->dma_running) {
DMA_release_DREQ (s->dma);
AUD_set_active_out (s->voice, 0);
s->dma_running = 0;
}
}
break;
case Error_Status_And_Initialization:
lwarn ("attempt to write to read only register %d\n", iaddr);
break;
case MODE_And_ID:
dolog ("val=%#x\n", val);
if (val & MODE2)
s->dregs[iaddr] |= MODE2;
else
s->dregs[iaddr] &= ~MODE2;
break;
case Alternate_Feature_Enable_I:
if (val & TE)
lerr ("timer is not yet supported\n");
s->dregs[iaddr] = val;
break;
case Alternate_Feature_Status:
if ((s->dregs[iaddr] & PI) && !(val & PI)) {
/* XXX: TI CI */
qemu_irq_lower (s->pic[s->irq]);
s->regs[Status] &= ~INT;
}
s->dregs[iaddr] = val;
break;
case Version_Chip_ID:
lwarn ("write to Version_Chip_ID register %#x\n", val);
s->dregs[iaddr] = val;
break;
default:
s->dregs[iaddr] = val;
break;
}
dolog ("written value %#x to indirect register %d\n", val, iaddr);
break;
case Status:
if (s->regs[Status] & INT) {
qemu_irq_lower (s->pic[s->irq]);
}
s->regs[Status] &= ~INT;
s->dregs[Alternate_Feature_Status] &= ~(PI | CI | TI);
break;
case PIO_Data:
lwarn ("attempt to write value %#x to PIO register\n", val);
break;
}
}
static int cs_write_audio (CSState *s, int nchan, int dma_pos,
int dma_len, int len)
{
int temp, net;
uint8_t tmpbuf[4096];
temp = len;
net = 0;
while (temp) {
int left = dma_len - dma_pos;
int copied;
size_t to_copy;
to_copy = audio_MIN (temp, left);
if (to_copy > sizeof (tmpbuf)) {
to_copy = sizeof (tmpbuf);
}
copied = DMA_read_memory (nchan, tmpbuf, dma_pos, to_copy);
if (s->tab) {
int i;
int16_t linbuf[4096];
for (i = 0; i < copied; ++i)
linbuf[i] = s->tab[tmpbuf[i]];
copied = AUD_write (s->voice, linbuf, copied << 1);
copied >>= 1;
}
else {
copied = AUD_write (s->voice, tmpbuf, copied);
}
temp -= copied;
dma_pos = (dma_pos + copied) % dma_len;
net += copied;
if (!copied) {
break;
}
}
return net;
}
static int cs_dma_read (void *opaque, int nchan, int dma_pos, int dma_len)
{
CSState *s = opaque;
int copy, written;
int till = -1;
copy = s->voice ? (s->audio_free >> (s->tab != NULL)) : dma_len;
if (s->dregs[Pin_Control] & IEN) {
till = (s->dregs[Playback_Lower_Base_Count]
| (s->dregs[Playback_Upper_Base_Count] << 8)) << s->shift;
till -= s->transferred;
copy = audio_MIN (till, copy);
}
if ((copy <= 0) || (dma_len <= 0)) {
return dma_pos;
}
written = cs_write_audio (s, nchan, dma_pos, dma_len, copy);
dma_pos = (dma_pos + written) % dma_len;
s->audio_free -= (written << (s->tab != NULL));
if (written == till) {
s->regs[Status] |= INT;
s->dregs[Alternate_Feature_Status] |= PI;
s->transferred = 0;
qemu_irq_raise (s->pic[s->irq]);
}
else {
s->transferred += written;
}
return dma_pos;
}
static void cs_save(QEMUFile *f, void *opaque)
{
CSState *s = opaque;
unsigned int i;
uint32_t val;
for (i = 0; i < CS_REGS; i++)
qemu_put_be32s(f, &s->regs[i]);
qemu_put_buffer(f, s->dregs, CS_DREGS);
val = s->dma_running; qemu_put_be32s(f, &val);
val = s->audio_free; qemu_put_be32s(f, &val);
val = s->transferred; qemu_put_be32s(f, &val);
val = s->aci_counter; qemu_put_be32s(f, &val);
}
static int cs_load(QEMUFile *f, void *opaque, int version_id)
{
CSState *s = opaque;
unsigned int i;
uint32_t val, dma_running;
if (version_id > 1)
return -EINVAL;
for (i = 0; i < CS_REGS; i++)
qemu_get_be32s(f, &s->regs[i]);
qemu_get_buffer(f, s->dregs, CS_DREGS);
qemu_get_be32s(f, &dma_running);
qemu_get_be32s(f, &val); s->audio_free = val;
qemu_get_be32s(f, &val); s->transferred = val;
qemu_get_be32s(f, &val); s->aci_counter = val;
if (dma_running && (s->dregs[Interface_Configuration] & PEN))
cs_reset_voices (s, s->dregs[FS_And_Playback_Data_Format]);
return 0;
}
int cs4231a_init (AudioState *audio, qemu_irq *pic)
{
int i;
CSState *s;
if (!audio) {
lerr ("No audio state\n");
return -1;
}
s = qemu_mallocz (sizeof (*s));
if (!s) {
lerr ("Could not allocate memory for cs4231a (%zu bytes)\n",
sizeof (*s));
return -1;
}
s->pic = pic;
s->irq = conf.irq;
s->dma = conf.dma;
s->port = conf.port;
for (i = 0; i < 4; i++) {
register_ioport_write (s->port + i, 1, 1, cs_write, s);
register_ioport_read (s->port + i, 1, 1, cs_read, s);
}
DMA_register_channel (s->dma, cs_dma_read, s);
register_savevm ("cs4231a", 0, 1, cs_save, cs_load, s);
qemu_register_reset (cs_reset, s);
cs_reset (s);
AUD_register_card (audio,"cs4231a", &s->card);
return 0;
}