qemu/hw/audio/marvell_88w8618.c

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/*
* Marvell 88w8618 audio emulation extracted from
* Marvell MV88w8618 / Freecom MusicPal emulation.
*
* Copyright (c) 2008 Jan Kiszka
*
* This code is licensed under the GNU GPL v2.
*
* Contributions after 2012-01-13 are licensed under the terms of the
* GNU GPL, version 2 or (at your option) any later version.
*/
#include "qemu/osdep.h"
#include "hw/sysbus.h"
#include "migration/vmstate.h"
#include "hw/irq.h"
#include "hw/qdev-properties.h"
#include "hw/audio/wm8750.h"
#include "audio/audio.h"
#include "qapi/error.h"
#include "qemu/module.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)
#define MV88W8618_AUDIO(obj) \
OBJECT_CHECK(mv88w8618_audio_state, (obj), TYPE_MV88W8618_AUDIO)
typedef struct mv88w8618_audio_state {
SysBusDevice parent_obj;
MemoryRegion iomem;
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;
void *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, 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 uint64_t mv88w8618_audio_read(void *opaque, hwaddr offset,
unsigned size)
{
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, hwaddr offset,
uint64_t value, unsigned size)
{
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 = MV88W8618_AUDIO(d);
s->playback_mode = 0;
s->status = 0;
s->irq_enable = 0;
s->clock_div = 0;
s->threshold = 0;
s->phys_buf = 0;
}
static const MemoryRegionOps mv88w8618_audio_ops = {
.read = mv88w8618_audio_read,
.write = mv88w8618_audio_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void mv88w8618_audio_init(Object *obj)
{
SysBusDevice *dev = SYS_BUS_DEVICE(obj);
mv88w8618_audio_state *s = MV88W8618_AUDIO(dev);
sysbus_init_irq(dev, &s->irq);
memory_region_init_io(&s->iomem, obj, &mv88w8618_audio_ops, s,
"audio", MP_AUDIO_SIZE);
sysbus_init_mmio(dev, &s->iomem);
object_property_add_link(OBJECT(dev), "wm8750", TYPE_WM8750,
(Object **) &s->wm,
qdev_prop_allow_set_link_before_realize,
qom: Drop parameter @errp of object_property_add() & friends The only way object_property_add() can fail is when a property with the same name already exists. Since our property names are all hardcoded, failure is a programming error, and the appropriate way to handle it is passing &error_abort. Same for its variants, except for object_property_add_child(), which additionally fails when the child already has a parent. Parentage is also under program control, so this is a programming error, too. We have a bit over 500 callers. Almost half of them pass &error_abort, slightly fewer ignore errors, one test case handles errors, and the remaining few callers pass them to their own callers. The previous few commits demonstrated once again that ignoring programming errors is a bad idea. Of the few ones that pass on errors, several violate the Error API. The Error ** argument must be NULL, &error_abort, &error_fatal, or a pointer to a variable containing NULL. Passing an argument of the latter kind twice without clearing it in between is wrong: if the first call sets an error, it no longer points to NULL for the second call. ich9_pm_add_properties(), sparc32_ledma_realize(), sparc32_dma_realize(), xilinx_axidma_realize(), xilinx_enet_realize() are wrong that way. When the one appropriate choice of argument is &error_abort, letting users pick the argument is a bad idea. Drop parameter @errp and assert the preconditions instead. There's one exception to "duplicate property name is a programming error": the way object_property_add() implements the magic (and undocumented) "automatic arrayification". Don't drop @errp there. Instead, rename object_property_add() to object_property_try_add(), and add the obvious wrapper object_property_add(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20200505152926.18877-15-armbru@redhat.com> [Two semantic rebase conflicts resolved]
2020-05-05 18:29:22 +03:00
0);
}
static void mv88w8618_audio_realize(DeviceState *dev, Error **errp)
{
mv88w8618_audio_state *s = MV88W8618_AUDIO(dev);
wm8750_data_req_set(s->wm, mv88w8618_audio_callback, s);
}
static const VMStateDescription mv88w8618_audio_vmsd = {
.name = "mv88w8618_audio",
.version_id = 1,
.minimum_version_id = 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 void mv88w8618_audio_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = mv88w8618_audio_realize;
dc->reset = mv88w8618_audio_reset;
dc->vmsd = &mv88w8618_audio_vmsd;
qdev: Replace cannot_instantiate_with_device_add_yet with !user_creatable cannot_instantiate_with_device_add_yet was introduced by commit efec3dd631d94160288392721a5f9c39e50fb2bc to replace no_user. It was supposed to be a temporary measure. When it was introduced, we had 54 cannot_instantiate_with_device_add_yet=true lines in the code. Today (3 years later) this number has not shrunk: we now have 57 cannot_instantiate_with_device_add_yet=true lines. I think it is safe to say it is not a temporary measure, and we won't see the flag go away soon. Instead of a long field name that misleads people to believe it is temporary, replace it a shorter and less misleading field: user_creatable. Except for code comments, changes were generated using the following Coccinelle patch: @@ expression DC; @@ ( -DC->cannot_instantiate_with_device_add_yet = false; +DC->user_creatable = true; | -DC->cannot_instantiate_with_device_add_yet = true; +DC->user_creatable = false; ) @@ typedef ObjectClass; expression dc; identifier class, data; @@ static void device_class_init(ObjectClass *class, void *data) { ... dc->hotpluggable = true; +dc->user_creatable = true; ... } @@ @@ struct DeviceClass { ... -bool cannot_instantiate_with_device_add_yet; +bool user_creatable; ... } @@ expression DC; @@ ( -!DC->cannot_instantiate_with_device_add_yet +DC->user_creatable | -DC->cannot_instantiate_with_device_add_yet +!DC->user_creatable ) Cc: Alistair Francis <alistair.francis@xilinx.com> Cc: Laszlo Ersek <lersek@redhat.com> Cc: Marcel Apfelbaum <marcel@redhat.com> Cc: Markus Armbruster <armbru@redhat.com> Cc: Peter Maydell <peter.maydell@linaro.org> Cc: Thomas Huth <thuth@redhat.com> Acked-by: Alistair Francis <alistair.francis@xilinx.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Acked-by: Marcel Apfelbaum <marcel@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <20170503203604.31462-2-ehabkost@redhat.com> [ehabkost: kept "TODO remove once we're there" comment] Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-05-03 23:35:44 +03:00
dc->user_creatable = false;
}
static const TypeInfo mv88w8618_audio_info = {
.name = TYPE_MV88W8618_AUDIO,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(mv88w8618_audio_state),
.instance_init = mv88w8618_audio_init,
.class_init = mv88w8618_audio_class_init,
};
static void mv88w8618_register_types(void)
{
type_register_static(&mv88w8618_audio_info);
}
type_init(mv88w8618_register_types)