--- /dev/null
+/*
+ * 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 "hw/sysbus.h"
+#include "hw/hw.h"
+#include "hw/i2c/i2c.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)
+
+#define TYPE_MV88W8618_AUDIO "mv88w8618_audio"
+#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 int mv88w8618_audio_init(SysBusDevice *dev)
+{
+ mv88w8618_audio_state *s = MV88W8618_AUDIO(dev);
+
+ sysbus_init_irq(dev, &s->irq);
+
+ wm8750_data_req_set(s->wm, mv88w8618_audio_callback, s);
+
+ memory_region_init_io(&s->iomem, OBJECT(s), &mv88w8618_audio_ops, s,
+ "audio", MP_AUDIO_SIZE);
+ sysbus_init_mmio(dev, &s->iomem);
+
+ return 0;
+}
+
+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 Property mv88w8618_audio_properties[] = {
+ DEFINE_PROP_PTR("wm8750", mv88w8618_audio_state, wm),
+ {/* end of list */},
+};
+
+static void mv88w8618_audio_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+ k->init = mv88w8618_audio_init;
+ dc->reset = mv88w8618_audio_reset;
+ dc->vmsd = &mv88w8618_audio_vmsd;
+ dc->props = mv88w8618_audio_properties;
+ /* Reason: pointer property "wm8750" */
+ dc->cannot_instantiate_with_device_add_yet = true;
+}
+
+static const TypeInfo mv88w8618_audio_info = {
+ .name = TYPE_MV88W8618_AUDIO,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(mv88w8618_audio_state),
+ .class_init = mv88w8618_audio_class_init,
+};
+
+static void mv88w8618_register_types(void)
+{
+ type_register_static(&mv88w8618_audio_info);
+}
+
+type_init(mv88w8618_register_types)
Code Review / kvmfornfv.git / blobdiff