diff options
Diffstat (limited to 'hw/audio/marvell_88w8618.c')
| -rw-r--r-- | hw/audio/marvell_88w8618.c | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/hw/audio/marvell_88w8618.c b/hw/audio/marvell_88w8618.c new file mode 100644 index 000000000..e6c09bdb8 --- /dev/null +++ b/hw/audio/marvell_88w8618.c @@ -0,0 +1,313 @@ +/* + * 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" +#include "qom/object.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) + +OBJECT_DECLARE_SIMPLE_TYPE(mv88w8618_audio_state, MV88W8618_AUDIO) + +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; +}; + +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, + 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; + 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) |