| /* |
| * 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 "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; |
| 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; |
| 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 uint64_t mv88w8618_audio_read(void *opaque, target_phys_addr_t 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, target_phys_addr_t 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 = 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 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 = FROM_SYSBUS(mv88w8618_audio_state, dev); |
| |
| sysbus_init_irq(dev, &s->irq); |
| |
| wm8750_data_req_set(s->wm, mv88w8618_audio_callback, s); |
| |
| memory_region_init_io(&s->iomem, &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, |
| .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) |