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-rw-r--r--hw/musicpal.c427
1 files changed, 40 insertions, 387 deletions
diff --git a/hw/musicpal.c b/hw/musicpal.c
index a98881f8b6..670a704cf0 100644
--- a/hw/musicpal.c
+++ b/hw/musicpal.c
@@ -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;
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-21 17:31:59 +0000