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-rw-r--r--Makefile.target2
-rw-r--r--hw/marvell_88w8618_audio.c274
2 files changed, 275 insertions, 1 deletions
diff --git a/Makefile.target b/Makefile.target
index 1fee0d9afd..595c88bdd7 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -272,7 +272,7 @@ obj-arm-y += omap2.o omap_dss.o soc_dma.o
obj-arm-y += omap_sx1.o palm.o tsc210x.o
obj-arm-y += nseries.o blizzard.o onenand.o vga.o cbus.o tusb6010.o usb-musb.o
obj-arm-y += mst_fpga.o mainstone.o
-obj-arm-y += musicpal.o pflash_cfi02.o bitbang_i2c.o
+obj-arm-y += musicpal.o pflash_cfi02.o bitbang_i2c.o marvell_88w8618_audio.o
obj-arm-y += framebuffer.o
obj-arm-y += syborg.o syborg_fb.o syborg_interrupt.o syborg_keyboard.o
obj-arm-y += syborg_serial.o syborg_timer.o syborg_pointer.o syborg_rtc.o
diff --git a/hw/marvell_88w8618_audio.c b/hw/marvell_88w8618_audio.c
new file mode 100644
index 0000000000..5c6d3a595d
--- /dev/null
+++ b/hw/marvell_88w8618_audio.c
@@ -0,0 +1,274 @@
+/*
+ * 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 *mv88w8618_audio_readfn[] = {
+ mv88w8618_audio_read,
+ mv88w8618_audio_read,
+ mv88w8618_audio_read
+};
+
+static CPUWriteMemoryFunc *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)
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-29 01:49:13 +0000