[qemu.git] / hw / audio / marvell_88w8618.c

/*
 * 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 "hw/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;
    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 = FROM_SYSBUS(mv88w8618_audio_state,
                                           SYS_BUS_DEVICE(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 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;
}

static const TypeInfo mv88w8618_audio_info = {
    .name          = "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)
Commit	Line	Data
ef07b491 AZ	1	/*
	2	* Marvell 88w8618 audio emulation extracted from
	3	* Marvell MV88w8618 / Freecom MusicPal emulation.
	4	*
	5	* Copyright (c) 2008 Jan Kiszka
	6	*
8e31bf38	7	* This code is licensed under the GNU GPL v2.
6b620ca3 PB	8	*
	9	* Contributions after 2012-01-13 are licensed under the terms of the
	10	* GNU GPL, version 2 or (at your option) any later version.
ef07b491	11	*/
83c9f4ca PB	12	#include "hw/sysbus.h"
83c9f4ca PB	13	#include "hw/hw.h"
0d09e41a	14	#include "hw/i2c/i2c.h"
83c9f4ca	15	#include "hw/sysbus.h"
ef07b491 AZ	16	#include "audio/audio.h"
	17
	18	#define MP_AUDIO_SIZE 0x00001000
	19
	20	/* Audio register offsets */
	21	#define MP_AUDIO_PLAYBACK_MODE 0x00
	22	#define MP_AUDIO_CLOCK_DIV 0x18
	23	#define MP_AUDIO_IRQ_STATUS 0x20
	24	#define MP_AUDIO_IRQ_ENABLE 0x24
	25	#define MP_AUDIO_TX_START_LO 0x28
	26	#define MP_AUDIO_TX_THRESHOLD 0x2C
	27	#define MP_AUDIO_TX_STATUS 0x38
	28	#define MP_AUDIO_TX_START_HI 0x40
	29
	30	/* Status register and IRQ enable bits */
	31	#define MP_AUDIO_TX_HALF (1 << 6)
	32	#define MP_AUDIO_TX_FULL (1 << 7)
	33
	34	/* Playback mode bits */
	35	#define MP_AUDIO_16BIT_SAMPLE (1 << 0)
	36	#define MP_AUDIO_PLAYBACK_EN (1 << 7)
	37	#define MP_AUDIO_CLOCK_24MHZ (1 << 9)
	38	#define MP_AUDIO_MONO (1 << 14)
	39
ef07b491 AZ	40	typedef struct mv88w8618_audio_state {
ef07b491 AZ	41	SysBusDevice busdev;
e2ba99e9	42	MemoryRegion iomem;
ef07b491 AZ	43	qemu_irq irq;
	44	uint32_t playback_mode;
	45	uint32_t status;
	46	uint32_t irq_enable;
d5b61ddd	47	uint32_t phys_buf;
ef07b491	48	uint32_t target_buffer;
d5b61ddd JK	49	uint32_t threshold;
	50	uint32_t play_pos;
	51	uint32_t last_free;
ef07b491	52	uint32_t clock_div;
e855761c	53	void *wm;
ef07b491 AZ	54	} mv88w8618_audio_state;
	55
	56	static void mv88w8618_audio_callback(void *opaque, int free_out, int free_in)
	57	{
	58	mv88w8618_audio_state *s = opaque;
	59	int16_t *codec_buffer;
	60	int8_t buf[4096];
	61	int8_t *mem_buffer;
	62	int pos, block_size;
	63
49fedd0d	64	if (!(s->playback_mode & MP_AUDIO_PLAYBACK_EN)) {
ef07b491	65	return;
49fedd0d JK	66	}
49fedd0d JK	67	if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE) {
ef07b491	68	free_out <<= 1;
49fedd0d JK	69	}
49fedd0d JK	70	if (!(s->playback_mode & MP_AUDIO_MONO)) {
ef07b491	71	free_out <<= 1;
49fedd0d	72	}
ef07b491	73	block_size = s->threshold / 2;
49fedd0d	74	if (free_out - s->last_free < block_size) {
ef07b491	75	return;
49fedd0d JK	76	}
49fedd0d JK	77	if (block_size > 4096) {
ef07b491	78	return;
49fedd0d	79	}
e1fe50dc	80	cpu_physical_memory_read(s->target_buffer + s->play_pos, buf, block_size);
ef07b491 AZ	81	mem_buffer = buf;
	82	if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE) {
	83	if (s->playback_mode & MP_AUDIO_MONO) {
	84	codec_buffer = wm8750_dac_buffer(s->wm, block_size >> 1);
	85	for (pos = 0; pos < block_size; pos += 2) {
	86	codec_buffer++ = (int16_t *)mem_buffer;
	87	codec_buffer++ = (int16_t *)mem_buffer;
	88	mem_buffer += 2;
	89	}
49fedd0d	90	} else {
ef07b491 AZ	91	memcpy(wm8750_dac_buffer(s->wm, block_size >> 2),
ef07b491 AZ	92	(uint32_t *)mem_buffer, block_size);
49fedd0d	93	}
ef07b491 AZ	94	} else {
	95	if (s->playback_mode & MP_AUDIO_MONO) {
	96	codec_buffer = wm8750_dac_buffer(s->wm, block_size);
	97	for (pos = 0; pos < block_size; pos++) {
	98	codec_buffer++ = cpu_to_le16(256 *mem_buffer);
	99	codec_buffer++ = cpu_to_le16(256 *mem_buffer++);
	100	}
	101	} else {
	102	codec_buffer = wm8750_dac_buffer(s->wm, block_size >> 1);
	103	for (pos = 0; pos < block_size; pos += 2) {
	104	codec_buffer++ = cpu_to_le16(256 *mem_buffer++);
	105	codec_buffer++ = cpu_to_le16(256 *mem_buffer++);
	106	}
	107	}
	108	}
	109	wm8750_dac_commit(s->wm);
	110
	111	s->last_free = free_out - block_size;
	112
	113	if (s->play_pos == 0) {
	114	s->status \|= MP_AUDIO_TX_HALF;
	115	s->play_pos = block_size;
	116	} else {
	117	s->status \|= MP_AUDIO_TX_FULL;
	118	s->play_pos = 0;
	119	}
	120
49fedd0d	121	if (s->status & s->irq_enable) {
ef07b491	122	qemu_irq_raise(s->irq);
49fedd0d	123	}
ef07b491 AZ	124	}
	125
	126	static void mv88w8618_audio_clock_update(mv88w8618_audio_state *s)
	127	{
	128	int rate;
	129
49fedd0d	130	if (s->playback_mode & MP_AUDIO_CLOCK_24MHZ) {
ef07b491	131	rate = 24576000 / 64; /* 24.576MHz */
49fedd0d	132	} else {
ef07b491	133	rate = 11289600 / 64; /* 11.2896MHz */
49fedd0d	134	}
ef07b491 AZ	135	rate /= ((s->clock_div >> 8) & 0xff) + 1;
	136
	137	wm8750_set_bclk_in(s->wm, rate);
	138	}
	139
a8170e5e	140	static uint64_t mv88w8618_audio_read(void *opaque, hwaddr offset,
e2ba99e9	141	unsigned size)
ef07b491 AZ	142	{
	143	mv88w8618_audio_state *s = opaque;
	144
	145	switch (offset) {
	146	case MP_AUDIO_PLAYBACK_MODE:
	147	return s->playback_mode;
	148
	149	case MP_AUDIO_CLOCK_DIV:
	150	return s->clock_div;
	151
	152	case MP_AUDIO_IRQ_STATUS:
	153	return s->status;
	154
	155	case MP_AUDIO_IRQ_ENABLE:
	156	return s->irq_enable;
	157
	158	case MP_AUDIO_TX_STATUS:
	159	return s->play_pos >> 2;
	160
	161	default:
	162	return 0;
	163	}
	164	}
	165
a8170e5e	166	static void mv88w8618_audio_write(void *opaque, hwaddr offset,
e2ba99e9	167	uint64_t value, unsigned size)
ef07b491 AZ	168	{
	169	mv88w8618_audio_state *s = opaque;
	170
	171	switch (offset) {
	172	case MP_AUDIO_PLAYBACK_MODE:
	173	if (value & MP_AUDIO_PLAYBACK_EN &&
	174	!(s->playback_mode & MP_AUDIO_PLAYBACK_EN)) {
	175	s->status = 0;
	176	s->last_free = 0;
	177	s->play_pos = 0;
	178	}
	179	s->playback_mode = value;
	180	mv88w8618_audio_clock_update(s);
	181	break;
	182
	183	case MP_AUDIO_CLOCK_DIV:
	184	s->clock_div = value;
	185	s->last_free = 0;
	186	s->play_pos = 0;
	187	mv88w8618_audio_clock_update(s);
	188	break;
	189
	190	case MP_AUDIO_IRQ_STATUS:
	191	s->status &= ~value;
	192	break;
	193
	194	case MP_AUDIO_IRQ_ENABLE:
	195	s->irq_enable = value;
49fedd0d	196	if (s->status & s->irq_enable) {
ef07b491	197	qemu_irq_raise(s->irq);
49fedd0d	198	}
ef07b491 AZ	199	break;
	200
	201	case MP_AUDIO_TX_START_LO:
	202	s->phys_buf = (s->phys_buf & 0xFFFF0000) \| (value & 0xFFFF);
	203	s->target_buffer = s->phys_buf;
	204	s->play_pos = 0;
	205	s->last_free = 0;
	206	break;
	207
	208	case MP_AUDIO_TX_THRESHOLD:
	209	s->threshold = (value + 1) * 4;
	210	break;
	211
	212	case MP_AUDIO_TX_START_HI:
	213	s->phys_buf = (s->phys_buf & 0xFFFF) \| (value << 16);
	214	s->target_buffer = s->phys_buf;
	215	s->play_pos = 0;
	216	s->last_free = 0;
	217	break;
	218	}
	219	}
	220
d5b61ddd	221	static void mv88w8618_audio_reset(DeviceState *d)
ef07b491	222	{
d5b61ddd	223	mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state,
1356b98d	224	SYS_BUS_DEVICE(d));
ef07b491 AZ	225
	226	s->playback_mode = 0;
	227	s->status = 0;
	228	s->irq_enable = 0;
267c4840 JK	229	s->clock_div = 0;
	230	s->threshold = 0;
	231	s->phys_buf = 0;
ef07b491 AZ	232	}
ef07b491 AZ	233
e2ba99e9 BC	234	static const MemoryRegionOps mv88w8618_audio_ops = {
	235	.read = mv88w8618_audio_read,
	236	.write = mv88w8618_audio_write,
	237	.endianness = DEVICE_NATIVE_ENDIAN,
ef07b491 AZ	238	};
ef07b491 AZ	239
81a322d4	240	static int mv88w8618_audio_init(SysBusDevice *dev)
ef07b491 AZ	241	{
ef07b491 AZ	242	mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state, dev);
ef07b491 AZ	243
	244	sysbus_init_irq(dev, &s->irq);
	245
	246	wm8750_data_req_set(s->wm, mv88w8618_audio_callback, s);
	247
e2ba99e9 BC	248	memory_region_init_io(&s->iomem, &mv88w8618_audio_ops, s,
e2ba99e9 BC	249	"audio", MP_AUDIO_SIZE);
750ecd44	250	sysbus_init_mmio(dev, &s->iomem);
ef07b491	251
81a322d4	252	return 0;
ef07b491 AZ	253	}
ef07b491 AZ	254
d5b61ddd JK	255	static const VMStateDescription mv88w8618_audio_vmsd = {
	256	.name = "mv88w8618_audio",
	257	.version_id = 1,
	258	.minimum_version_id = 1,
	259	.minimum_version_id_old = 1,
	260	.fields = (VMStateField[]) {
	261	VMSTATE_UINT32(playback_mode, mv88w8618_audio_state),
	262	VMSTATE_UINT32(status, mv88w8618_audio_state),
	263	VMSTATE_UINT32(irq_enable, mv88w8618_audio_state),
	264	VMSTATE_UINT32(phys_buf, mv88w8618_audio_state),
	265	VMSTATE_UINT32(target_buffer, mv88w8618_audio_state),
	266	VMSTATE_UINT32(threshold, mv88w8618_audio_state),
	267	VMSTATE_UINT32(play_pos, mv88w8618_audio_state),
	268	VMSTATE_UINT32(last_free, mv88w8618_audio_state),
	269	VMSTATE_UINT32(clock_div, mv88w8618_audio_state),
	270	VMSTATE_END_OF_LIST()
	271	}
	272	};
	273
999e12bb AL	274	static Property mv88w8618_audio_properties[] = {
	275	DEFINE_PROP_PTR("wm8750", mv88w8618_audio_state, wm),
	276	{/* end of list */},
	277	};
	278
	279	static void mv88w8618_audio_class_init(ObjectClass klass, void data)
	280	{
39bffca2	281	DeviceClass *dc = DEVICE_CLASS(klass);
999e12bb AL	282	SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
	283
	284	k->init = mv88w8618_audio_init;
39bffca2 AL	285	dc->reset = mv88w8618_audio_reset;
	286	dc->vmsd = &mv88w8618_audio_vmsd;
	287	dc->props = mv88w8618_audio_properties;
999e12bb AL	288	}
999e12bb AL	289
8c43a6f0	290	static const TypeInfo mv88w8618_audio_info = {
39bffca2 AL	291	.name = "mv88w8618_audio",
	292	.parent = TYPE_SYS_BUS_DEVICE,
	293	.instance_size = sizeof(mv88w8618_audio_state),
	294	.class_init = mv88w8618_audio_class_init,
ef07b491	295	};
ef07b491	296
83f7d43a	297	static void mv88w8618_register_types(void)
ef07b491	298	{
39bffca2	299	type_register_static(&mv88w8618_audio_info);
ef07b491 AZ	300	}
ef07b491 AZ	301
83f7d43a	302	type_init(mv88w8618_register_types)