[qemu.git] / hw / marvell_88w8618_audio.c

/*
 * Marvell 88w8618 audio emulation extracted from
 * Marvell MV88w8618 / Freecom MusicPal emulation.
 *
 * Copyright (c) 2008 Jan Kiszka
 *
 * This code is licenced under the GNU GPL v2.
 */
#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)

#ifdef HAS_AUDIO
typedef struct mv88w8618_audio_state {
    SysBusDevice busdev;
    qemu_irq irq;
    uint32_t playback_mode;
    uint32_t status;
    uint32_t irq_enable;
    unsigned long phys_buf;
    uint32_t target_buffer;
    unsigned int threshold;
    unsigned int play_pos;
    unsigned int 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 uint32_t mv88w8618_audio_read(void *opaque, target_phys_addr_t offset)
{
    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,
                                 uint32_t value)
{
    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(void *opaque)
{
    mv88w8618_audio_state *s = opaque;

    s->playback_mode = 0;
    s->status = 0;
    s->irq_enable = 0;
}

static CPUReadMemoryFunc * const mv88w8618_audio_readfn[] = {
    mv88w8618_audio_read,
    mv88w8618_audio_read,
    mv88w8618_audio_read
};

static CPUWriteMemoryFunc * const mv88w8618_audio_writefn[] = {
    mv88w8618_audio_write,
    mv88w8618_audio_write,
    mv88w8618_audio_write
};

static void mv88w8618_audio_init(SysBusDevice *dev)
{
    mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state, dev);
    int iomemtype;

    sysbus_init_irq(dev, &s->irq);

    wm8750_data_req_set(s->wm, mv88w8618_audio_callback, s);

    iomemtype = cpu_register_io_memory(mv88w8618_audio_readfn,
                                       mv88w8618_audio_writefn, s);
    sysbus_init_mmio(dev, MP_AUDIO_SIZE, iomemtype);

    qemu_register_reset(mv88w8618_audio_reset, s);
}

static SysBusDeviceInfo mv88w8618_audio_info = {
    .init = mv88w8618_audio_init,
    .qdev.name  = "mv88w8618_audio",
    .qdev.size  = sizeof(mv88w8618_audio_state),
    .qdev.props = (Property[]) {
        {
            .name   = "wm8750",
            .info   = &qdev_prop_ptr,
            .offset = offsetof(mv88w8618_audio_state, wm),
        },
        {/* end of list */}
    }
};
#endif

static void mv88w8618_register_devices(void)
{
#ifdef HAS_AUDIO
    sysbus_register_withprop(&mv88w8618_audio_info);
#endif
}

device_init(mv88w8618_register_devices)
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	*
	7	* This code is licenced under the GNU GPL v2.
	8	*/
	9	#include "sysbus.h"
	10	#include "hw.h"
	11	#include "i2c.h"
	12	#include "sysbus.h"
	13	#include "audio/audio.h"
	14
	15	#define MP_AUDIO_SIZE 0x00001000
	16
	17	/* Audio register offsets */
	18	#define MP_AUDIO_PLAYBACK_MODE 0x00
	19	#define MP_AUDIO_CLOCK_DIV 0x18
	20	#define MP_AUDIO_IRQ_STATUS 0x20
	21	#define MP_AUDIO_IRQ_ENABLE 0x24
	22	#define MP_AUDIO_TX_START_LO 0x28
	23	#define MP_AUDIO_TX_THRESHOLD 0x2C
	24	#define MP_AUDIO_TX_STATUS 0x38
	25	#define MP_AUDIO_TX_START_HI 0x40
	26
	27	/* Status register and IRQ enable bits */
	28	#define MP_AUDIO_TX_HALF (1 << 6)
	29	#define MP_AUDIO_TX_FULL (1 << 7)
	30
	31	/* Playback mode bits */
	32	#define MP_AUDIO_16BIT_SAMPLE (1 << 0)
	33	#define MP_AUDIO_PLAYBACK_EN (1 << 7)
	34	#define MP_AUDIO_CLOCK_24MHZ (1 << 9)
	35	#define MP_AUDIO_MONO (1 << 14)
	36
	37	#ifdef HAS_AUDIO
	38	typedef struct mv88w8618_audio_state {
	39	SysBusDevice busdev;
	40	qemu_irq irq;
	41	uint32_t playback_mode;
	42	uint32_t status;
	43	uint32_t irq_enable;
	44	unsigned long phys_buf;
	45	uint32_t target_buffer;
	46	unsigned int threshold;
	47	unsigned int play_pos;
	48	unsigned int last_free;
	49	uint32_t clock_div;
	50	DeviceState *wm;
	51	} mv88w8618_audio_state;
	52
	53	static void mv88w8618_audio_callback(void *opaque, int free_out, int free_in)
	54	{
	55	mv88w8618_audio_state *s = opaque;
	56	int16_t *codec_buffer;
	57	int8_t buf[4096];
	58	int8_t *mem_buffer;
	59	int pos, block_size;
	60
	61	if (!(s->playback_mode & MP_AUDIO_PLAYBACK_EN))
	62	return;
	63
	64	if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE)
65	free_out <<= 1;
66
67	if (!(s->playback_mode & MP_AUDIO_MONO))
68	free_out <<= 1;
69
70	block_size = s->threshold / 2;
71	if (free_out - s->last_free < block_size)
72	return;
73
74	if (block_size > 4096)
75	return;
76
77	cpu_physical_memory_read(s->target_buffer + s->play_pos, (void *)buf,
78	block_size);
79	mem_buffer = buf;
80	if (s->playback_mode & MP_AUDIO_16BIT_SAMPLE) {
81	if (s->playback_mode & MP_AUDIO_MONO) {
82	codec_buffer = wm8750_dac_buffer(s->wm, block_size >> 1);
83	for (pos = 0; pos < block_size; pos += 2) {
84	codec_buffer++ = (int16_t *)mem_buffer;
85	codec_buffer++ = (int16_t *)mem_buffer;
86	mem_buffer += 2;
87	}
88	} else
89	memcpy(wm8750_dac_buffer(s->wm, block_size >> 2),
90	(uint32_t *)mem_buffer, block_size);
91	} else {
92	if (s->playback_mode & MP_AUDIO_MONO) {
93	codec_buffer = wm8750_dac_buffer(s->wm, block_size);
94	for (pos = 0; pos < block_size; pos++) {
95	codec_buffer++ = cpu_to_le16(256 *mem_buffer);
96	codec_buffer++ = cpu_to_le16(256 *mem_buffer++);
97	}
98	} else {
99	codec_buffer = wm8750_dac_buffer(s->wm, block_size >> 1);
100	for (pos = 0; pos < block_size; pos += 2) {
101	codec_buffer++ = cpu_to_le16(256 *mem_buffer++);
102	codec_buffer++ = cpu_to_le16(256 *mem_buffer++);
103	}
104	}
105	}
106	wm8750_dac_commit(s->wm);
107
108	s->last_free = free_out - block_size;
109
110	if (s->play_pos == 0) {
111	s->status \|= MP_AUDIO_TX_HALF;
112	s->play_pos = block_size;
113	} else {
114	s->status \|= MP_AUDIO_TX_FULL;
115	s->play_pos = 0;
116	}
117
118	if (s->status & s->irq_enable)
119	qemu_irq_raise(s->irq);
120	}
121
122	static void mv88w8618_audio_clock_update(mv88w8618_audio_state *s)
123	{
124	int rate;
125
126	if (s->playback_mode & MP_AUDIO_CLOCK_24MHZ)
127	rate = 24576000 / 64; /* 24.576MHz */
128	else
129	rate = 11289600 / 64; /* 11.2896MHz */
130
131	rate /= ((s->clock_div >> 8) & 0xff) + 1;
132
133	wm8750_set_bclk_in(s->wm, rate);
134	}
135
136	static uint32_t mv88w8618_audio_read(void *opaque, target_phys_addr_t offset)
137	{
138	mv88w8618_audio_state *s = opaque;
139
140	switch (offset) {
141	case MP_AUDIO_PLAYBACK_MODE:
142	return s->playback_mode;
143
144	case MP_AUDIO_CLOCK_DIV:
145	return s->clock_div;
146
147	case MP_AUDIO_IRQ_STATUS:
148	return s->status;
149
150	case MP_AUDIO_IRQ_ENABLE:
151	return s->irq_enable;
152
153	case MP_AUDIO_TX_STATUS:
154	return s->play_pos >> 2;
155
156	default:
157	return 0;
158	}
159	}
160
161	static void mv88w8618_audio_write(void *opaque, target_phys_addr_t offset,
162	uint32_t value)
163	{
164	mv88w8618_audio_state *s = opaque;
165
166	switch (offset) {
167	case MP_AUDIO_PLAYBACK_MODE:
168	if (value & MP_AUDIO_PLAYBACK_EN &&
169	!(s->playback_mode & MP_AUDIO_PLAYBACK_EN)) {
170	s->status = 0;
171	s->last_free = 0;
172	s->play_pos = 0;
173	}
174	s->playback_mode = value;
175	mv88w8618_audio_clock_update(s);
176	break;
177
178	case MP_AUDIO_CLOCK_DIV:
179	s->clock_div = value;
180	s->last_free = 0;
181	s->play_pos = 0;
182	mv88w8618_audio_clock_update(s);
183	break;
184
185	case MP_AUDIO_IRQ_STATUS:
186	s->status &= ~value;
187	break;
188
189	case MP_AUDIO_IRQ_ENABLE:
190	s->irq_enable = value;
191	if (s->status & s->irq_enable)
192	qemu_irq_raise(s->irq);
193	break;
194
195	case MP_AUDIO_TX_START_LO:
196	s->phys_buf = (s->phys_buf & 0xFFFF0000) \| (value & 0xFFFF);
197	s->target_buffer = s->phys_buf;
198	s->play_pos = 0;
199	s->last_free = 0;
200	break;
201
202	case MP_AUDIO_TX_THRESHOLD:
203	s->threshold = (value + 1) * 4;
204	break;
205
206	case MP_AUDIO_TX_START_HI:
207	s->phys_buf = (s->phys_buf & 0xFFFF) \| (value << 16);
208	s->target_buffer = s->phys_buf;
209	s->play_pos = 0;
210	s->last_free = 0;
211	break;
212	}
213	}
214
215	static void mv88w8618_audio_reset(void *opaque)
216	{
217	mv88w8618_audio_state *s = opaque;
218
219	s->playback_mode = 0;
220	s->status = 0;
221	s->irq_enable = 0;
222	}
223
d60efc6b	224	static CPUReadMemoryFunc * const mv88w8618_audio_readfn[] = {
ef07b491 AZ	225	mv88w8618_audio_read,
	226	mv88w8618_audio_read,
	227	mv88w8618_audio_read
	228	};
	229
d60efc6b	230	static CPUWriteMemoryFunc * const mv88w8618_audio_writefn[] = {
ef07b491 AZ	231	mv88w8618_audio_write,
	232	mv88w8618_audio_write,
	233	mv88w8618_audio_write
	234	};
	235
	236	static void mv88w8618_audio_init(SysBusDevice *dev)
	237	{
	238	mv88w8618_audio_state *s = FROM_SYSBUS(mv88w8618_audio_state, dev);
	239	int iomemtype;
	240
	241	sysbus_init_irq(dev, &s->irq);
	242
	243	wm8750_data_req_set(s->wm, mv88w8618_audio_callback, s);
	244
	245	iomemtype = cpu_register_io_memory(mv88w8618_audio_readfn,
	246	mv88w8618_audio_writefn, s);
	247	sysbus_init_mmio(dev, MP_AUDIO_SIZE, iomemtype);
	248
	249	qemu_register_reset(mv88w8618_audio_reset, s);
	250	}
	251
	252	static SysBusDeviceInfo mv88w8618_audio_info = {
	253	.init = mv88w8618_audio_init,
	254	.qdev.name = "mv88w8618_audio",
	255	.qdev.size = sizeof(mv88w8618_audio_state),
	256	.qdev.props = (Property[]) {
	257	{
	258	.name = "wm8750",
	259	.info = &qdev_prop_ptr,
	260	.offset = offsetof(mv88w8618_audio_state, wm),
	261	},
	262	{/* end of list */}
	263	}
	264	};
	265	#endif
	266
	267	static void mv88w8618_register_devices(void)
	268	{
	269	#ifdef HAS_AUDIO
	270	sysbus_register_withprop(&mv88w8618_audio_info);
	271	#endif
	272	}
	273
	274	device_init(mv88w8618_register_devices)