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xemu/hw/marvell_88w8618_audio.c
Alexander Graf 2507c12ab0 Add endianness as io mem parameter 
As stated before, devices can be little, big or native endian. The
target endianness is not of their concern, so we need to push things
down a level.

This patch adds a parameter to cpu_register_io_memory that allows a
device to choose its endianness. For now, all devices simply choose
native endian, because that's the same behavior as before.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-12-11 15:24:25 +00:00

300 lines
8.1 KiB
C
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/*
* Marvell 88w8618 audio emulation extracted from
* Marvell MV88w8618 / Freecom MusicPal emulation.
*
* Copyright (c) 2008 Jan Kiszka
*
* This code is licenced under the GNU GPL v2.
*/
#include "sysbus.h"
#include "hw.h"
#include "i2c.h"
#include "sysbus.h"
#include "audio/audio.h"
#define MP_AUDIO_SIZE 0x00001000
/* Audio register offsets */
#define MP_AUDIO_PLAYBACK_MODE 0x00
#define MP_AUDIO_CLOCK_DIV 0x18
#define MP_AUDIO_IRQ_STATUS 0x20
#define MP_AUDIO_IRQ_ENABLE 0x24
#define MP_AUDIO_TX_START_LO 0x28
#define MP_AUDIO_TX_THRESHOLD 0x2C
#define MP_AUDIO_TX_STATUS 0x38
#define MP_AUDIO_TX_START_HI 0x40
/* Status register and IRQ enable bits */
#define MP_AUDIO_TX_HALF (1 << 6)
#define MP_AUDIO_TX_FULL (1 << 7)
/* Playback mode bits */
#define MP_AUDIO_16BIT_SAMPLE (1 << 0)
#define MP_AUDIO_PLAYBACK_EN (1 << 7)
#define MP_AUDIO_CLOCK_24MHZ (1 << 9)
#define MP_AUDIO_MONO (1 << 14)
typedef struct mv88w8618_audio_state {
SysBusDevice busdev;
qemu_irq irq;
uint32_t playback_mode;
uint32_t status;
uint32_t irq_enable;
uint32_t phys_buf;
uint32_t target_buffer;
uint32_t threshold;
uint32_t play_pos;
uint32_t last_free;
uint32_t clock_div;
DeviceState *wm;
} mv88w8618_audio_state;
static void mv88w8618_audio_callback(void *opaque, int free_out, int free_in)
{
mv88w8618_audio_state *s = opaque;
int16_t *codec_buffer;
int8_t buf[4096];
int8_t *mem_buffer;
int pos, block_size;
if (!(s->playback_mode & MP_AUDIO_PLAYBACK_EN)) {
return;
}
if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE) {
free_out <<= 1;
}
if (!(s->playback_mode & MP_AUDIO_MONO)) {
free_out <<= 1;
}
block_size = s->threshold / 2;
if (free_out - s->last_free < block_size) {
return;
}
if (block_size > 4096) {
return;
}
cpu_physical_memory_read(s->target_buffer + s->play_pos, (void *)buf,
block_size);
mem_buffer = buf;
if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE) {
if (s->playback_mode & MP_AUDIO_MONO) {
codec_buffer = wm8750_dac_buffer(s->wm, block_size >> 1);
for (pos = 0; pos < block_size; pos += 2) {
*codec_buffer++ = *(int16_t *)mem_buffer;
*codec_buffer++ = *(int16_t *)mem_buffer;
mem_buffer += 2;
}
} else {
memcpy(wm8750_dac_buffer(s->wm, block_size >> 2),
(uint32_t *)mem_buffer, block_size);
}
} else {
if (s->playback_mode & MP_AUDIO_MONO) {
codec_buffer = wm8750_dac_buffer(s->wm, block_size);
for (pos = 0; pos < block_size; pos++) {
*codec_buffer++ = cpu_to_le16(256 * *mem_buffer);
*codec_buffer++ = cpu_to_le16(256 * *mem_buffer++);
}
} else {
codec_buffer = wm8750_dac_buffer(s->wm, block_size >> 1);
for (pos = 0; pos < block_size; pos += 2) {
*codec_buffer++ = cpu_to_le16(256 * *mem_buffer++);
*codec_buffer++ = cpu_to_le16(256 * *mem_buffer++);
}
}
}
wm8750_dac_commit(s->wm);
s->last_free = free_out - block_size;
if (s->play_pos == 0) {
s->status |= MP_AUDIO_TX_HALF;
s->play_pos = block_size;
} else {
s->status |= MP_AUDIO_TX_FULL;
s->play_pos = 0;
}
if (s->status & s->irq_enable) {
qemu_irq_raise(s->irq);
}
}
static void mv88w8618_audio_clock_update(mv88w8618_audio_state *s)
{
int rate;
if (s->playback_mode & MP_AUDIO_CLOCK_24MHZ) {
rate = 24576000 / 64; /* 24.576MHz */
} else {
rate = 11289600 / 64; /* 11.2896MHz */
}
rate /= ((s->clock_div >> 8) & 0xff) + 1;
wm8750_set_bclk_in(s->wm, rate);
}
static uint32_t mv88w8618_audio_read(void *opaque, target_phys_addr_t offset)
{
mv88w8618_audio_state *s = opaque;
switch (offset) {
case MP_AUDIO_PLAYBACK_MODE:
return s->playback_mode;
case MP_AUDIO_CLOCK_DIV:
return s->clock_div;
case MP_AUDIO_IRQ_STATUS:
return s->status;
case MP_AUDIO_IRQ_ENABLE:
return s->irq_enable;
case MP_AUDIO_TX_STATUS:
return s->play_pos >> 2;
default:
return 0;
}
}
static void mv88w8618_audio_write(void *opaque, target_phys_addr_t offset,
uint32_t value)
{
mv88w8618_audio_state *s = opaque;
switch (offset) {
case MP_AUDIO_PLAYBACK_MODE:
if (value & MP_AUDIO_PLAYBACK_EN &&
!(s->playback_mode & MP_AUDIO_PLAYBACK_EN)) {
s->status = 0;
s->last_free = 0;
s->play_pos = 0;
}
s->playback_mode = value;
mv88w8618_audio_clock_update(s);
break;
case MP_AUDIO_CLOCK_DIV:
s->clock_div = value;
s->last_free = 0;
s->play_pos = 0;
mv88w8618_audio_clock_update(s);
break;
case MP_AUDIO_IRQ_STATUS:
s->status &= ~value;
break;
case MP_AUDIO_IRQ_ENABLE:
s->irq_enable = value;
if (s->status & s->irq_enable) {
qemu_irq_raise(s->irq);
}
break;
case MP_AUDIO_TX_START_LO:
s->phys_buf = (s->phys_buf & 0xFFFF0000) | (value & 0xFFFF);
s->target_buffer = s->phys_buf;
s->play_pos = 0;
s->last_free = 0;
break;
case MP_AUDIO_TX_THRESHOLD:
s->threshold = (value + 1) * 4;
break;
case MP_AUDIO_TX_START_HI:
s->phys_buf = (s->phys_buf & 0xFFFF) | (value << 16);
s->target_buffer = s->phys_buf;
s->play_pos = 0;
s->last_free = 0;
break;
}
}
static void mv88w8618_audio_reset(DeviceState *d)
{
mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state,
sysbus_from_qdev(d));
s->playback_mode = 0;
s->status = 0;
s->irq_enable = 0;
s->clock_div = 0;
s->threshold = 0;
s->phys_buf = 0;
}
static CPUReadMemoryFunc * const mv88w8618_audio_readfn[] = {
mv88w8618_audio_read,
mv88w8618_audio_read,
mv88w8618_audio_read
};
static CPUWriteMemoryFunc * const mv88w8618_audio_writefn[] = {
mv88w8618_audio_write,
mv88w8618_audio_write,
mv88w8618_audio_write
};
static int mv88w8618_audio_init(SysBusDevice *dev)
{
mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state, dev);
int iomemtype;
sysbus_init_irq(dev, &s->irq);
wm8750_data_req_set(s->wm, mv88w8618_audio_callback, s);
iomemtype = cpu_register_io_memory(mv88w8618_audio_readfn,
mv88w8618_audio_writefn, s,
DEVICE_NATIVE_ENDIAN);
sysbus_init_mmio(dev, MP_AUDIO_SIZE, iomemtype);
return 0;
}
static const VMStateDescription mv88w8618_audio_vmsd = {
.name = "mv88w8618_audio",
.version_id = 1,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(playback_mode, mv88w8618_audio_state),
VMSTATE_UINT32(status, mv88w8618_audio_state),
VMSTATE_UINT32(irq_enable, mv88w8618_audio_state),
VMSTATE_UINT32(phys_buf, mv88w8618_audio_state),
VMSTATE_UINT32(target_buffer, mv88w8618_audio_state),
VMSTATE_UINT32(threshold, mv88w8618_audio_state),
VMSTATE_UINT32(play_pos, mv88w8618_audio_state),
VMSTATE_UINT32(last_free, mv88w8618_audio_state),
VMSTATE_UINT32(clock_div, mv88w8618_audio_state),
VMSTATE_END_OF_LIST()
}
};
static SysBusDeviceInfo mv88w8618_audio_info = {
.init = mv88w8618_audio_init,
.qdev.name = "mv88w8618_audio",
.qdev.size = sizeof(mv88w8618_audio_state),
.qdev.reset = mv88w8618_audio_reset,
.qdev.vmsd = &mv88w8618_audio_vmsd,
.qdev.props = (Property[]) {
{
.name = "wm8750",
.info = &qdev_prop_ptr,
.offset = offsetof(mv88w8618_audio_state, wm),
},
{/* end of list */}
}
};
static void mv88w8618_register_devices(void)
{
sysbus_register_withprop(&mv88w8618_audio_info);
}
device_init(mv88w8618_register_devices)
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