[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 "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, NULL, &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"
ef07b491 AZ	15	#include "audio/audio.h"
	16
	17	#define MP_AUDIO_SIZE 0x00001000
	18
	19	/* Audio register offsets */
	20	#define MP_AUDIO_PLAYBACK_MODE 0x00
	21	#define MP_AUDIO_CLOCK_DIV 0x18
	22	#define MP_AUDIO_IRQ_STATUS 0x20
	23	#define MP_AUDIO_IRQ_ENABLE 0x24
	24	#define MP_AUDIO_TX_START_LO 0x28
	25	#define MP_AUDIO_TX_THRESHOLD 0x2C
	26	#define MP_AUDIO_TX_STATUS 0x38
	27	#define MP_AUDIO_TX_START_HI 0x40
	28
	29	/* Status register and IRQ enable bits */
	30	#define MP_AUDIO_TX_HALF (1 << 6)
	31	#define MP_AUDIO_TX_FULL (1 << 7)
	32
	33	/* Playback mode bits */
	34	#define MP_AUDIO_16BIT_SAMPLE (1 << 0)
	35	#define MP_AUDIO_PLAYBACK_EN (1 << 7)
	36	#define MP_AUDIO_CLOCK_24MHZ (1 << 9)
	37	#define MP_AUDIO_MONO (1 << 14)
	38
ef07b491 AZ	39	typedef struct mv88w8618_audio_state {
ef07b491 AZ	40	SysBusDevice busdev;
e2ba99e9	41	MemoryRegion iomem;
ef07b491 AZ	42	qemu_irq irq;
	43	uint32_t playback_mode;
	44	uint32_t status;
	45	uint32_t irq_enable;
d5b61ddd	46	uint32_t phys_buf;
ef07b491	47	uint32_t target_buffer;
d5b61ddd JK	48	uint32_t threshold;
	49	uint32_t play_pos;
	50	uint32_t last_free;
ef07b491	51	uint32_t clock_div;
e855761c	52	void *wm;
ef07b491 AZ	53	} mv88w8618_audio_state;
	54
	55	static void mv88w8618_audio_callback(void *opaque, int free_out, int free_in)
	56	{
	57	mv88w8618_audio_state *s = opaque;
	58	int16_t *codec_buffer;
	59	int8_t buf[4096];
	60	int8_t *mem_buffer;
	61	int pos, block_size;
	62
49fedd0d	63	if (!(s->playback_mode & MP_AUDIO_PLAYBACK_EN)) {
ef07b491	64	return;
49fedd0d JK	65	}
49fedd0d JK	66	if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE) {
ef07b491	67	free_out <<= 1;
49fedd0d JK	68	}
49fedd0d JK	69	if (!(s->playback_mode & MP_AUDIO_MONO)) {
ef07b491	70	free_out <<= 1;
49fedd0d	71	}
ef07b491	72	block_size = s->threshold / 2;
49fedd0d	73	if (free_out - s->last_free < block_size) {
ef07b491	74	return;
49fedd0d JK	75	}
49fedd0d JK	76	if (block_size > 4096) {
ef07b491	77	return;
49fedd0d	78	}
e1fe50dc	79	cpu_physical_memory_read(s->target_buffer + s->play_pos, buf, block_size);
ef07b491 AZ	80	mem_buffer = buf;
	81	if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE) {
	82	if (s->playback_mode & MP_AUDIO_MONO) {
	83	codec_buffer = wm8750_dac_buffer(s->wm, block_size >> 1);
	84	for (pos = 0; pos < block_size; pos += 2) {
	85	codec_buffer++ = (int16_t *)mem_buffer;
	86	codec_buffer++ = (int16_t *)mem_buffer;
	87	mem_buffer += 2;
	88	}
49fedd0d	89	} else {
ef07b491 AZ	90	memcpy(wm8750_dac_buffer(s->wm, block_size >> 2),
ef07b491 AZ	91	(uint32_t *)mem_buffer, block_size);
49fedd0d	92	}
ef07b491 AZ	93	} else {
	94	if (s->playback_mode & MP_AUDIO_MONO) {
	95	codec_buffer = wm8750_dac_buffer(s->wm, block_size);
	96	for (pos = 0; pos < block_size; pos++) {
	97	codec_buffer++ = cpu_to_le16(256 *mem_buffer);
	98	codec_buffer++ = cpu_to_le16(256 *mem_buffer++);
	99	}
	100	} else {
	101	codec_buffer = wm8750_dac_buffer(s->wm, block_size >> 1);
	102	for (pos = 0; pos < block_size; pos += 2) {
	103	codec_buffer++ = cpu_to_le16(256 *mem_buffer++);
	104	codec_buffer++ = cpu_to_le16(256 *mem_buffer++);
	105	}
	106	}
	107	}
	108	wm8750_dac_commit(s->wm);
	109
	110	s->last_free = free_out - block_size;
	111
	112	if (s->play_pos == 0) {
	113	s->status \|= MP_AUDIO_TX_HALF;
	114	s->play_pos = block_size;
	115	} else {
	116	s->status \|= MP_AUDIO_TX_FULL;
	117	s->play_pos = 0;
	118	}
	119
49fedd0d	120	if (s->status & s->irq_enable) {
ef07b491	121	qemu_irq_raise(s->irq);
49fedd0d	122	}
ef07b491 AZ	123	}
	124
	125	static void mv88w8618_audio_clock_update(mv88w8618_audio_state *s)
	126	{
	127	int rate;
	128
49fedd0d	129	if (s->playback_mode & MP_AUDIO_CLOCK_24MHZ) {
ef07b491	130	rate = 24576000 / 64; /* 24.576MHz */
49fedd0d	131	} else {
ef07b491	132	rate = 11289600 / 64; /* 11.2896MHz */
49fedd0d	133	}
ef07b491 AZ	134	rate /= ((s->clock_div >> 8) & 0xff) + 1;
	135
	136	wm8750_set_bclk_in(s->wm, rate);
	137	}
	138
a8170e5e	139	static uint64_t mv88w8618_audio_read(void *opaque, hwaddr offset,
e2ba99e9	140	unsigned size)
ef07b491 AZ	141	{
	142	mv88w8618_audio_state *s = opaque;
	143
	144	switch (offset) {
	145	case MP_AUDIO_PLAYBACK_MODE:
	146	return s->playback_mode;
	147
	148	case MP_AUDIO_CLOCK_DIV:
	149	return s->clock_div;
	150
	151	case MP_AUDIO_IRQ_STATUS:
	152	return s->status;
	153
	154	case MP_AUDIO_IRQ_ENABLE:
	155	return s->irq_enable;
	156
	157	case MP_AUDIO_TX_STATUS:
	158	return s->play_pos >> 2;
	159
	160	default:
	161	return 0;
	162	}
	163	}
	164
a8170e5e	165	static void mv88w8618_audio_write(void *opaque, hwaddr offset,
e2ba99e9	166	uint64_t value, unsigned size)
ef07b491 AZ	167	{
	168	mv88w8618_audio_state *s = opaque;
	169
	170	switch (offset) {
	171	case MP_AUDIO_PLAYBACK_MODE:
	172	if (value & MP_AUDIO_PLAYBACK_EN &&
	173	!(s->playback_mode & MP_AUDIO_PLAYBACK_EN)) {
	174	s->status = 0;
	175	s->last_free = 0;
	176	s->play_pos = 0;
	177	}
	178	s->playback_mode = value;
	179	mv88w8618_audio_clock_update(s);
	180	break;
	181
	182	case MP_AUDIO_CLOCK_DIV:
	183	s->clock_div = value;
	184	s->last_free = 0;
	185	s->play_pos = 0;
	186	mv88w8618_audio_clock_update(s);
	187	break;
	188
	189	case MP_AUDIO_IRQ_STATUS:
	190	s->status &= ~value;
	191	break;
	192
	193	case MP_AUDIO_IRQ_ENABLE:
	194	s->irq_enable = value;
49fedd0d	195	if (s->status & s->irq_enable) {
ef07b491	196	qemu_irq_raise(s->irq);
49fedd0d	197	}
ef07b491 AZ	198	break;
	199
	200	case MP_AUDIO_TX_START_LO:
	201	s->phys_buf = (s->phys_buf & 0xFFFF0000) \| (value & 0xFFFF);
	202	s->target_buffer = s->phys_buf;
	203	s->play_pos = 0;
	204	s->last_free = 0;
	205	break;
	206
	207	case MP_AUDIO_TX_THRESHOLD:
	208	s->threshold = (value + 1) * 4;
	209	break;
	210
	211	case MP_AUDIO_TX_START_HI:
	212	s->phys_buf = (s->phys_buf & 0xFFFF) \| (value << 16);
	213	s->target_buffer = s->phys_buf;
	214	s->play_pos = 0;
	215	s->last_free = 0;
	216	break;
	217	}
	218	}
	219
d5b61ddd	220	static void mv88w8618_audio_reset(DeviceState *d)
ef07b491	221	{
d5b61ddd	222	mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state,
1356b98d	223	SYS_BUS_DEVICE(d));
ef07b491 AZ	224
	225	s->playback_mode = 0;
	226	s->status = 0;
	227	s->irq_enable = 0;
267c4840 JK	228	s->clock_div = 0;
	229	s->threshold = 0;
	230	s->phys_buf = 0;
ef07b491 AZ	231	}
ef07b491 AZ	232
e2ba99e9 BC	233	static const MemoryRegionOps mv88w8618_audio_ops = {
	234	.read = mv88w8618_audio_read,
	235	.write = mv88w8618_audio_write,
	236	.endianness = DEVICE_NATIVE_ENDIAN,
ef07b491 AZ	237	};
ef07b491 AZ	238
81a322d4	239	static int mv88w8618_audio_init(SysBusDevice *dev)
ef07b491 AZ	240	{
ef07b491 AZ	241	mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state, dev);
ef07b491 AZ	242
	243	sysbus_init_irq(dev, &s->irq);
	244
	245	wm8750_data_req_set(s->wm, mv88w8618_audio_callback, s);
	246
2c9b15ca	247	memory_region_init_io(&s->iomem, NULL, &mv88w8618_audio_ops, s,
e2ba99e9	248	"audio", MP_AUDIO_SIZE);
750ecd44	249	sysbus_init_mmio(dev, &s->iomem);
ef07b491	250
81a322d4	251	return 0;
ef07b491 AZ	252	}
ef07b491 AZ	253
d5b61ddd JK	254	static const VMStateDescription mv88w8618_audio_vmsd = {
	255	.name = "mv88w8618_audio",
	256	.version_id = 1,
	257	.minimum_version_id = 1,
	258	.minimum_version_id_old = 1,
	259	.fields = (VMStateField[]) {
	260	VMSTATE_UINT32(playback_mode, mv88w8618_audio_state),
	261	VMSTATE_UINT32(status, mv88w8618_audio_state),
	262	VMSTATE_UINT32(irq_enable, mv88w8618_audio_state),
	263	VMSTATE_UINT32(phys_buf, mv88w8618_audio_state),
	264	VMSTATE_UINT32(target_buffer, mv88w8618_audio_state),
	265	VMSTATE_UINT32(threshold, mv88w8618_audio_state),
	266	VMSTATE_UINT32(play_pos, mv88w8618_audio_state),
	267	VMSTATE_UINT32(last_free, mv88w8618_audio_state),
	268	VMSTATE_UINT32(clock_div, mv88w8618_audio_state),
	269	VMSTATE_END_OF_LIST()
	270	}
	271	};
	272
999e12bb AL	273	static Property mv88w8618_audio_properties[] = {
	274	DEFINE_PROP_PTR("wm8750", mv88w8618_audio_state, wm),
	275	{/* end of list */},
	276	};
	277
	278	static void mv88w8618_audio_class_init(ObjectClass klass, void data)
	279	{
39bffca2	280	DeviceClass *dc = DEVICE_CLASS(klass);
999e12bb AL	281	SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
	282
	283	k->init = mv88w8618_audio_init;
39bffca2 AL	284	dc->reset = mv88w8618_audio_reset;
	285	dc->vmsd = &mv88w8618_audio_vmsd;
	286	dc->props = mv88w8618_audio_properties;
999e12bb AL	287	}
999e12bb AL	288
8c43a6f0	289	static const TypeInfo mv88w8618_audio_info = {
39bffca2 AL	290	.name = "mv88w8618_audio",
	291	.parent = TYPE_SYS_BUS_DEVICE,
	292	.instance_size = sizeof(mv88w8618_audio_state),
	293	.class_init = mv88w8618_audio_class_init,
ef07b491	294	};
ef07b491	295
83f7d43a	296	static void mv88w8618_register_types(void)
ef07b491	297	{
39bffca2	298	type_register_static(&mv88w8618_audio_info);
ef07b491 AZ	299	}
ef07b491 AZ	300
83f7d43a	301	type_init(mv88w8618_register_types)