[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, (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, 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	}
ef07b491 AZ	80	cpu_physical_memory_read(s->target_buffer + s->play_pos, (void *)buf,
	81	block_size);
	82	mem_buffer = buf;
	83	if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE) {
	84	if (s->playback_mode & MP_AUDIO_MONO) {
	85	codec_buffer = wm8750_dac_buffer(s->wm, block_size >> 1);
	86	for (pos = 0; pos < block_size; pos += 2) {
	87	codec_buffer++ = (int16_t *)mem_buffer;
	88	codec_buffer++ = (int16_t *)mem_buffer;
	89	mem_buffer += 2;
	90	}
49fedd0d	91	} else {
ef07b491 AZ	92	memcpy(wm8750_dac_buffer(s->wm, block_size >> 2),
ef07b491 AZ	93	(uint32_t *)mem_buffer, block_size);
49fedd0d	94	}
ef07b491 AZ	95	} else {
	96	if (s->playback_mode & MP_AUDIO_MONO) {
	97	codec_buffer = wm8750_dac_buffer(s->wm, block_size);
	98	for (pos = 0; pos < block_size; pos++) {
	99	codec_buffer++ = cpu_to_le16(256 *mem_buffer);
	100	codec_buffer++ = cpu_to_le16(256 *mem_buffer++);
	101	}
	102	} else {
	103	codec_buffer = wm8750_dac_buffer(s->wm, block_size >> 1);
	104	for (pos = 0; pos < block_size; pos += 2) {
	105	codec_buffer++ = cpu_to_le16(256 *mem_buffer++);
	106	codec_buffer++ = cpu_to_le16(256 *mem_buffer++);
	107	}
	108	}
	109	}
	110	wm8750_dac_commit(s->wm);
	111
	112	s->last_free = free_out - block_size;
	113
	114	if (s->play_pos == 0) {
	115	s->status \|= MP_AUDIO_TX_HALF;
	116	s->play_pos = block_size;
	117	} else {
	118	s->status \|= MP_AUDIO_TX_FULL;
	119	s->play_pos = 0;
	120	}
	121
49fedd0d	122	if (s->status & s->irq_enable) {
ef07b491	123	qemu_irq_raise(s->irq);
49fedd0d	124	}
ef07b491 AZ	125	}
	126
	127	static void mv88w8618_audio_clock_update(mv88w8618_audio_state *s)
	128	{
	129	int rate;
	130
49fedd0d	131	if (s->playback_mode & MP_AUDIO_CLOCK_24MHZ) {
ef07b491	132	rate = 24576000 / 64; /* 24.576MHz */
49fedd0d	133	} else {
ef07b491	134	rate = 11289600 / 64; /* 11.2896MHz */
49fedd0d	135	}
ef07b491 AZ	136	rate /= ((s->clock_div >> 8) & 0xff) + 1;
	137
	138	wm8750_set_bclk_in(s->wm, rate);
	139	}
	140
a8170e5e	141	static uint64_t mv88w8618_audio_read(void *opaque, hwaddr offset,
e2ba99e9	142	unsigned size)
ef07b491 AZ	143	{
	144	mv88w8618_audio_state *s = opaque;
	145
	146	switch (offset) {
	147	case MP_AUDIO_PLAYBACK_MODE:
	148	return s->playback_mode;
	149
	150	case MP_AUDIO_CLOCK_DIV:
	151	return s->clock_div;
	152
	153	case MP_AUDIO_IRQ_STATUS:
	154	return s->status;
	155
	156	case MP_AUDIO_IRQ_ENABLE:
	157	return s->irq_enable;
	158
	159	case MP_AUDIO_TX_STATUS:
	160	return s->play_pos >> 2;
	161
	162	default:
	163	return 0;
	164	}
	165	}
	166
a8170e5e	167	static void mv88w8618_audio_write(void *opaque, hwaddr offset,
e2ba99e9	168	uint64_t value, unsigned size)
ef07b491 AZ	169	{
	170	mv88w8618_audio_state *s = opaque;
	171
	172	switch (offset) {
	173	case MP_AUDIO_PLAYBACK_MODE:
	174	if (value & MP_AUDIO_PLAYBACK_EN &&
	175	!(s->playback_mode & MP_AUDIO_PLAYBACK_EN)) {
	176	s->status = 0;
	177	s->last_free = 0;
	178	s->play_pos = 0;
	179	}
	180	s->playback_mode = value;
	181	mv88w8618_audio_clock_update(s);
	182	break;
	183
	184	case MP_AUDIO_CLOCK_DIV:
	185	s->clock_div = value;
	186	s->last_free = 0;
	187	s->play_pos = 0;
	188	mv88w8618_audio_clock_update(s);
	189	break;
	190
	191	case MP_AUDIO_IRQ_STATUS:
	192	s->status &= ~value;
	193	break;
	194
	195	case MP_AUDIO_IRQ_ENABLE:
	196	s->irq_enable = value;
49fedd0d	197	if (s->status & s->irq_enable) {
ef07b491	198	qemu_irq_raise(s->irq);
49fedd0d	199	}
ef07b491 AZ	200	break;
	201
	202	case MP_AUDIO_TX_START_LO:
	203	s->phys_buf = (s->phys_buf & 0xFFFF0000) \| (value & 0xFFFF);
	204	s->target_buffer = s->phys_buf;
	205	s->play_pos = 0;
	206	s->last_free = 0;
	207	break;
	208
	209	case MP_AUDIO_TX_THRESHOLD:
	210	s->threshold = (value + 1) * 4;
	211	break;
	212
	213	case MP_AUDIO_TX_START_HI:
	214	s->phys_buf = (s->phys_buf & 0xFFFF) \| (value << 16);
	215	s->target_buffer = s->phys_buf;
	216	s->play_pos = 0;
	217	s->last_free = 0;
	218	break;
	219	}
	220	}
	221
d5b61ddd	222	static void mv88w8618_audio_reset(DeviceState *d)
ef07b491	223	{
d5b61ddd	224	mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state,
1356b98d	225	SYS_BUS_DEVICE(d));
ef07b491 AZ	226
	227	s->playback_mode = 0;
	228	s->status = 0;
	229	s->irq_enable = 0;
267c4840 JK	230	s->clock_div = 0;
	231	s->threshold = 0;
	232	s->phys_buf = 0;
ef07b491 AZ	233	}
ef07b491 AZ	234
e2ba99e9 BC	235	static const MemoryRegionOps mv88w8618_audio_ops = {
	236	.read = mv88w8618_audio_read,
	237	.write = mv88w8618_audio_write,
	238	.endianness = DEVICE_NATIVE_ENDIAN,
ef07b491 AZ	239	};
ef07b491 AZ	240
81a322d4	241	static int mv88w8618_audio_init(SysBusDevice *dev)
ef07b491 AZ	242	{
ef07b491 AZ	243	mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state, dev);
ef07b491 AZ	244
	245	sysbus_init_irq(dev, &s->irq);
	246
	247	wm8750_data_req_set(s->wm, mv88w8618_audio_callback, s);
	248
e2ba99e9 BC	249	memory_region_init_io(&s->iomem, &mv88w8618_audio_ops, s,
e2ba99e9 BC	250	"audio", MP_AUDIO_SIZE);
750ecd44	251	sysbus_init_mmio(dev, &s->iomem);
ef07b491	252
81a322d4	253	return 0;
ef07b491 AZ	254	}
ef07b491 AZ	255
d5b61ddd JK	256	static const VMStateDescription mv88w8618_audio_vmsd = {
	257	.name = "mv88w8618_audio",
	258	.version_id = 1,
	259	.minimum_version_id = 1,
	260	.minimum_version_id_old = 1,
	261	.fields = (VMStateField[]) {
	262	VMSTATE_UINT32(playback_mode, mv88w8618_audio_state),
	263	VMSTATE_UINT32(status, mv88w8618_audio_state),
	264	VMSTATE_UINT32(irq_enable, mv88w8618_audio_state),
	265	VMSTATE_UINT32(phys_buf, mv88w8618_audio_state),
	266	VMSTATE_UINT32(target_buffer, mv88w8618_audio_state),
	267	VMSTATE_UINT32(threshold, mv88w8618_audio_state),
	268	VMSTATE_UINT32(play_pos, mv88w8618_audio_state),
	269	VMSTATE_UINT32(last_free, mv88w8618_audio_state),
	270	VMSTATE_UINT32(clock_div, mv88w8618_audio_state),
	271	VMSTATE_END_OF_LIST()
	272	}
	273	};
	274
999e12bb AL	275	static Property mv88w8618_audio_properties[] = {
	276	DEFINE_PROP_PTR("wm8750", mv88w8618_audio_state, wm),
	277	{/* end of list */},
	278	};
	279
	280	static void mv88w8618_audio_class_init(ObjectClass klass, void data)
	281	{
39bffca2	282	DeviceClass *dc = DEVICE_CLASS(klass);
999e12bb AL	283	SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
	284
	285	k->init = mv88w8618_audio_init;
39bffca2 AL	286	dc->reset = mv88w8618_audio_reset;
	287	dc->vmsd = &mv88w8618_audio_vmsd;
	288	dc->props = mv88w8618_audio_properties;
999e12bb AL	289	}
999e12bb AL	290
8c43a6f0	291	static const TypeInfo mv88w8618_audio_info = {
39bffca2 AL	292	.name = "mv88w8618_audio",
	293	.parent = TYPE_SYS_BUS_DEVICE,
	294	.instance_size = sizeof(mv88w8618_audio_state),
	295	.class_init = mv88w8618_audio_class_init,
ef07b491	296	};
ef07b491	297
83f7d43a	298	static void mv88w8618_register_types(void)
ef07b491	299	{
39bffca2	300	type_register_static(&mv88w8618_audio_info);
ef07b491 AZ	301	}
ef07b491 AZ	302
83f7d43a	303	type_init(mv88w8618_register_types)