OpenE2K
/
qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

Make musicpal.c use the I2C device and the Marvell 88w8618 audio device 

Signed-off-by: Benoit Canet <benoit.canet@gmail.com>
Signed-off-by: Andrzej Zaborowski <balrogg@gmail.com>
This commit is contained in:
Andrzej Zaborowski 2009-08-23 15:51:14 +02:00
parent ef07b49145
commit d074769c5a
1 changed files with 40 additions and 387 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

427
hw/musicpal.c
View File

@ -17,7 +17,6 @@
#include "block.h"
#include "flash.h"
#include "console.h"
#include "audio/audio.h"
#include "i2c.h"
#define MP_MISC_BASE 0x80002000
@ -39,7 +38,6 @@
#define MP_FLASHCFG_SIZE 0x00001000
#define MP_AUDIO_BASE 0x90007000
#define MP_AUDIO_SIZE 0x00001000
#define MP_PIC_BASE 0x90008000
#define MP_PIC_SIZE 0x00001000
@ -70,385 +68,9 @@
static ram_addr_t sram_off;
typedef enum i2c_state {
STOPPED = 0,
INITIALIZING,
SENDING_BIT7,
SENDING_BIT6,
SENDING_BIT5,
SENDING_BIT4,
SENDING_BIT3,
SENDING_BIT2,
SENDING_BIT1,
SENDING_BIT0,
WAITING_FOR_ACK,
RECEIVING_BIT7,
RECEIVING_BIT6,
RECEIVING_BIT5,
RECEIVING_BIT4,
RECEIVING_BIT3,
RECEIVING_BIT2,
RECEIVING_BIT1,
RECEIVING_BIT0,
SENDING_ACK
} i2c_state;
typedef struct i2c_interface {
i2c_bus *bus;
i2c_state state;
int last_data;
int last_clock;
uint8_t buffer;
int current_addr;
} i2c_interface;
static void i2c_enter_stop(i2c_interface *i2c)
{
if (i2c->current_addr >= 0)
i2c_end_transfer(i2c->bus);
i2c->current_addr = -1;
i2c->state = STOPPED;
}
static void i2c_state_update(i2c_interface *i2c, int data, int clock)
{
if (!i2c)
return;
switch (i2c->state) {
case STOPPED:
if (data == 0 && i2c->last_data == 1 && clock == 1)
i2c->state = INITIALIZING;
break;
case INITIALIZING:
if (clock == 0 && i2c->last_clock == 1 && data == 0)
i2c->state = SENDING_BIT7;
else
i2c_enter_stop(i2c);
break;
case SENDING_BIT7 ... SENDING_BIT0:
if (clock == 0 && i2c->last_clock == 1) {
i2c->buffer = (i2c->buffer << 1) | data;
i2c->state++; /* will end up in WAITING_FOR_ACK */
} else if (data == 1 && i2c->last_data == 0 && clock == 1)
i2c_enter_stop(i2c);
break;
case WAITING_FOR_ACK:
if (clock == 0 && i2c->last_clock == 1) {
if (i2c->current_addr < 0) {
i2c->current_addr = i2c->buffer;
i2c_start_transfer(i2c->bus, i2c->current_addr & 0xfe,
i2c->buffer & 1);
} else
i2c_send(i2c->bus, i2c->buffer);
if (i2c->current_addr & 1) {
i2c->state = RECEIVING_BIT7;
i2c->buffer = i2c_recv(i2c->bus);
} else
i2c->state = SENDING_BIT7;
} else if (data == 1 && i2c->last_data == 0 && clock == 1)
i2c_enter_stop(i2c);
break;
case RECEIVING_BIT7 ... RECEIVING_BIT0:
if (clock == 0 && i2c->last_clock == 1) {
i2c->state++; /* will end up in SENDING_ACK */
i2c->buffer <<= 1;
} else if (data == 1 && i2c->last_data == 0 && clock == 1)
i2c_enter_stop(i2c);
break;
case SENDING_ACK:
if (clock == 0 && i2c->last_clock == 1) {
i2c->state = RECEIVING_BIT7;
if (data == 0)
i2c->buffer = i2c_recv(i2c->bus);
else
i2c_nack(i2c->bus);
} else if (data == 1 && i2c->last_data == 0 && clock == 1)
i2c_enter_stop(i2c);
break;
}
i2c->last_data = data;
i2c->last_clock = clock;
}
static int i2c_get_data(i2c_interface *i2c)
{
if (!i2c)
return 0;
switch (i2c->state) {
case RECEIVING_BIT7 ... RECEIVING_BIT0:
return (i2c->buffer >> 7);
case WAITING_FOR_ACK:
default:
return 0;
}
}
static i2c_interface *mixer_i2c;
#ifdef HAS_AUDIO
/* 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)
/* Wolfson 8750 I2C address */
#define MP_WM_ADDR 0x34
static const char audio_name[] = "mv88w8618";
typedef struct musicpal_audio_state {
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;
} musicpal_audio_state;
static void audio_callback(void *opaque, int free_out, int free_in)
{
musicpal_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 musicpal_audio_clock_update(musicpal_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 musicpal_audio_read(void *opaque, target_phys_addr_t offset)
{
musicpal_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 musicpal_audio_write(void *opaque, target_phys_addr_t offset,
uint32_t value)
{
musicpal_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;
musicpal_audio_clock_update(s);
break;
case MP_AUDIO_CLOCK_DIV:
s->clock_div = value;
s->last_free = 0;
s->play_pos = 0;
musicpal_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 musicpal_audio_reset(void *opaque)
{
musicpal_audio_state *s = opaque;
s->playback_mode = 0;
s->status = 0;
s->irq_enable = 0;
}
static CPUReadMemoryFunc *musicpal_audio_readfn[] = {
musicpal_audio_read,
musicpal_audio_read,
musicpal_audio_read
};
static CPUWriteMemoryFunc *musicpal_audio_writefn[] = {
musicpal_audio_write,
musicpal_audio_write,
musicpal_audio_write
};
static i2c_interface *musicpal_audio_init(qemu_irq irq)
{
musicpal_audio_state *s;
i2c_interface *i2c;
int iomemtype;
s = qemu_mallocz(sizeof(musicpal_audio_state));
s->irq = irq;
i2c = qemu_mallocz(sizeof(i2c_interface));
i2c->bus = i2c_init_bus(NULL, "i2c");
i2c->current_addr = -1;
s->wm = i2c_create_slave(i2c->bus, "wm8750", MP_WM_ADDR);
wm8750_data_req_set(s->wm, audio_callback, s);
iomemtype = cpu_register_io_memory(musicpal_audio_readfn,
musicpal_audio_writefn, s);
cpu_register_physical_memory(MP_AUDIO_BASE, MP_AUDIO_SIZE, iomemtype);
qemu_register_reset(musicpal_audio_reset, s);
return i2c;
}
#else /* !HAS_AUDIO */
static i2c_interface *musicpal_audio_init(qemu_irq irq)
{
return NULL;
}
#endif /* !HAS_AUDIO */
/* Ethernet register offsets */
#define MP_ETH_SMIR 0x010
#define MP_ETH_PCXR 0x408
@ -1327,10 +949,11 @@ typedef struct musicpal_gpio_state {
uint32_t out_state;
uint32_t in_state;
uint32_t isr;
uint32_t i2c_read_data;
uint32_t key_released;
uint32_t keys_event; /* store the received key event */
qemu_irq irq;
qemu_irq out[3];
qemu_irq out[5];
} musicpal_gpio_state;
static void musicpal_gpio_brightness_update(musicpal_gpio_state *s) {
@ -1399,6 +1022,10 @@ static void musicpal_gpio_irq(void *opaque, int irq, int level)
{
musicpal_gpio_state *s = (musicpal_gpio_state *) opaque;
if (irq == 10) {
s->i2c_read_data = level;
}
/* receives keys bits */
if (irq <= 7) {
s->keys_event &= ~(1 << irq);
@ -1435,7 +1062,7 @@ static uint32_t musicpal_gpio_read(void *opaque, target_phys_addr_t offset)
case MP_GPIO_IN_HI:
/* Update received I2C data */
s->in_state = (s->in_state & ~MP_GPIO_I2C_DATA) |
(i2c_get_data(mixer_i2c) << MP_GPIO_I2C_DATA_BIT);
(s->i2c_read_data << MP_GPIO_I2C_DATA_BIT);
return s->in_state >> 16;
case MP_GPIO_ISR_LO:
@ -1467,9 +1094,8 @@ static void musicpal_gpio_write(void *opaque, target_phys_addr_t offset,
s->lcd_brightness = (s->lcd_brightness & 0xFFFF) |
(s->out_state & MP_GPIO_LCD_BRIGHTNESS);
musicpal_gpio_brightness_update(s);
i2c_state_update(mixer_i2c,
(s->out_state >> MP_GPIO_I2C_DATA_BIT) & 1,
(s->out_state >> MP_GPIO_I2C_CLOCK_BIT) & 1);
qemu_set_irq(s->out[3], (s->out_state >> MP_GPIO_I2C_DATA_BIT) & 1);
qemu_set_irq(s->out[4], (s->out_state >> MP_GPIO_I2C_CLOCK_BIT) & 1);
break;
}
@ -1490,6 +1116,7 @@ static CPUWriteMemoryFunc *musicpal_gpio_writefn[] = {
static void musicpal_gpio_reset(musicpal_gpio_state *s)
{
s->in_state = 0xffffffff;
s->i2c_read_data = 1;
s->key_released = 0;
s->keys_event = 0;
s->isr = 0;
@ -1508,8 +1135,10 @@ static void musicpal_gpio_init(SysBusDevice *dev)
musicpal_gpio_reset(s);
qdev_init_gpio_out(&dev->qdev, s->out, 3);
qdev_init_gpio_in(&dev->qdev, musicpal_gpio_irq, 10);
/* 3 brightness out + 2 lcd (data and clock ) */
qdev_init_gpio_out(&dev->qdev, s->out, 5);
/* 10 gpio button input + 1 I2C data input */
qdev_init_gpio_in(&dev->qdev, musicpal_gpio_irq, 11);
}
/* Keyboard codes & masks */
@ -1646,8 +1275,14 @@ static void musicpal_init(ram_addr_t ram_size,
qemu_irq *cpu_pic;
qemu_irq pic[32];
DeviceState *dev;
DeviceState *i2c_dev;
DeviceState *lcd_dev;
DeviceState *key_dev;
#ifdef HAS_AUDIO
DeviceState *wm8750_dev;
SysBusDevice *s;
#endif
i2c_bus *i2c;
int i;
unsigned long flash_size;
DriveInfo *dinfo;
@ -1716,22 +1351,40 @@ static void musicpal_init(ram_addr_t ram_size,
sysbus_mmio_map(sysbus_from_qdev(dev), 0, MP_ETH_BASE);
sysbus_connect_irq(sysbus_from_qdev(dev), 0, pic[MP_ETH_IRQ]);
mixer_i2c = musicpal_audio_init(pic[MP_AUDIO_IRQ]);
sysbus_create_simple("mv88w8618_wlan", MP_WLAN_BASE, NULL);
musicpal_misc_init();
dev = sysbus_create_simple("musicpal_gpio", MP_GPIO_BASE, pic[MP_GPIO_IRQ]);
i2c_dev = sysbus_create_simple("bitbang_i2c", 0, NULL);
i2c = (i2c_bus *)qdev_get_child_bus(i2c_dev, "i2c");
lcd_dev = sysbus_create_simple("musicpal_lcd", MP_LCD_BASE, NULL);
key_dev = sysbus_create_simple("musicpal_key", 0, NULL);
/* I2C read data */
qdev_connect_gpio_out(i2c_dev, 0, qdev_get_gpio_in(dev, 10));
/* I2C data */
qdev_connect_gpio_out(dev, 3, qdev_get_gpio_in(i2c_dev, 0));
/* I2C clock */
qdev_connect_gpio_out(dev, 4, qdev_get_gpio_in(i2c_dev, 1));
for (i = 0; i < 3; i++)
qdev_connect_gpio_out(dev, i, qdev_get_gpio_in(lcd_dev, i));
for (i = 0; i < 10; i++)
qdev_connect_gpio_out(key_dev, i, qdev_get_gpio_in(dev, i));
#ifdef HAS_AUDIO
wm8750_dev = i2c_create_slave(i2c, "wm8750", MP_WM_ADDR);
dev = qdev_create(NULL, "mv88w8618_audio");
s = sysbus_from_qdev(dev);
qdev_prop_set_ptr(dev, "wm8750", wm8750_dev);
qdev_init(dev);
sysbus_mmio_map(s, 0, MP_AUDIO_BASE);
sysbus_connect_irq(s, 0, pic[MP_AUDIO_IRQ]);
#endif
musicpal_binfo.ram_size = MP_RAM_DEFAULT_SIZE;
musicpal_binfo.kernel_filename = kernel_filename;
musicpal_binfo.kernel_cmdline = kernel_cmdline;