This patch enables the playback of audio on a Mac OS 9 or Mac OS X guest.
Signed-off-by: John Arbuckle <programmingk...@gmail.com>
---
v4 changes:
- Switched to using HWADDR_PRIx in several debug statements.
v3 changes:
- Updated the location of patched code in hw/ppc/kconfig.
- Removed setting the props variable in screamer.c.
- Removed the screamer_properties variable in screamer.c.
v2 changes:
- Fixed a bug that prevented the sampling rate from being changed.
hw/audio/Kconfig | 3 +
hw/audio/Makefile.objs | 2 +
hw/audio/screamer.c | 985 ++++++++++++++++++++++++++++++++++++++++++
hw/misc/macio/macio.c | 35 +-
hw/ppc/Kconfig | 1 +
hw/ppc/mac.h | 5 +
include/hw/audio/screamer.h | 42 ++
include/hw/misc/macio/macio.h | 2 +
8 files changed, 1074 insertions(+), 1 deletion(-)
create mode 100644 hw/audio/screamer.c
create mode 100644 include/hw/audio/screamer.h
diff --git a/hw/audio/Kconfig b/hw/audio/Kconfig
index e9c6fed826..196da6c3fe 100644
--- a/hw/audio/Kconfig
+++ b/hw/audio/Kconfig
@@ -50,3 +50,6 @@ config CS4231
config MARVELL_88W8618
bool
+
+config SCREAMER
+ bool
diff --git a/hw/audio/Makefile.objs b/hw/audio/Makefile.objs
index 63db383709..55906886bc 100644
--- a/hw/audio/Makefile.objs
+++ b/hw/audio/Makefile.objs
@@ -15,4 +15,6 @@ common-obj-$(CONFIG_CS4231) += cs4231.o
common-obj-$(CONFIG_MARVELL_88W8618) += marvell_88w8618.o
common-obj-$(CONFIG_MILKYMIST) += milkymist-ac97.o
+common-obj-$(CONFIG_SCREAMER) += screamer.o
+
common-obj-y += soundhw.o
diff --git a/hw/audio/screamer.c b/hw/audio/screamer.c
new file mode 100644
index 0000000000..7de17fe8a6
--- /dev/null
+++ b/hw/audio/screamer.c
@@ -0,0 +1,985 @@
+/*
+ * File: Screamer.c
+ * Description: Implement the Screamer sound chip used in Apple Macintoshes.
+ * It works by filling a buffer, then playing the buffer.
+ */
+
+#include "qemu/osdep.h"
+#include "audio/audio.h"
+#include "hw/hw.h"
+#include "hw/irq.h"
+#include <inttypes.h>
+#include "hw/ppc/mac.h"
+#include "hw/qdev-properties.h"
+#include "migration/vmstate.h"
+#include "include/hw/audio/screamer.h"
+
+#define DEBUG_SCREAMER 0
+#define DPRINTF(fmt, ...) \
+do { if (DEBUG_SCREAMER) { printf(fmt , ## __VA_ARGS__); } } while (0)
+
+#define SOUND_CONTROL_REG 0
+#define CODEC_CONTROL_REG 1
+#define CODEC_STATUS_REG 2
+#define CLIP_COUNT_REG 3
+#define BYTE_SWAP_REG 4
+#define FRAME_COUNT_REG 5
+
+#define AWACS_BUSY 0x01000000
+
+/* Used with AWACS register 1 */
+#define RECALIBRATE 0x004
+#define LOOPTHRU 0x040
+#define SPEAKER_MUTE 0x080
+#define HEADPHONE_MUTE 0x200
+#define OUTPUT_ZERO 0x400
+#define OUTPUT_ONE 0x800
+#define PARALLEL_OUTPUT 0xc00
+
+/* Function prototypes */
+static uint32_t set_busy_bit(uint32_t value, int bit);
+static uint32_t set_part_ready_bit(uint32_t value, int bit_value);
+static uint32_t set_revision(uint32_t input_value);
+static uint32_t set_manufacturer(uint32_t input_value);
+static int get_sampling_rate(ScreamerState *s);
+static uint32_t get_frame_count_reg(ScreamerState *s);
+static void add_to_speaker_buffer(DBDMA_io *io);
+static void dma_request(DBDMA_io *io);
+
+
+/**************************** Getters *************************/
+
+/* Returns the codec control register's encoded AWACS address */
+static uint8_t get_codec_control_address(uint32_t value)
+{
+ uint8_t return_value;
+ return_value = (value >> 12) & 0x00000fff;
+ return return_value;
+}
+
+
+static uint32_t get_sound_control_reg(ScreamerState *s)
+{
+ DPRINTF("%s() called - returned 0x%x\n", __func__, s->sound_control);
+ return s->sound_control;
+}
+
+/* The AWACS registers are accessed thru this register */
+static uint32_t get_codec_control_reg(ScreamerState *s)
+{
+ int awacs_register = get_codec_control_address(s->codec_control);
+ uint32_t return_value = s->awacs[awacs_register];
+ return_value = set_busy_bit(return_value, 0); /* Tell CPU we are ready */
+ DPRINTF("%s() called - returned 0x%x\tAWACS register: %d\n", __func__,
+ return_value, awacs_register);
+ return return_value;
+}
+
+/*
+ * Determines if the readback bit is set.
+ * It is used by the Codec Control register.
+ */
+static bool readback_enabled(ScreamerState *s)
+{
+/* Note: bit zero is the readback enabled bit */
+ if (s->awacs[7] & 1) {
+ return true;
+ } else {
+ return false;
+ }
+}
+
+static uint32_t get_codec_status_reg(ScreamerState *s)
+{
+ uint32_t return_value;
+
+ /* if in readback mode - return AWACS register value */
+ if (readback_enabled(s)) {
+ int awacs_register = (s->awacs[7] & 0xe) >> 1;
+ s->awacs[7] = s->awacs[7] & 0xfffffffe; /* turn off readback mode */
+ return_value = s->awacs[awacs_register] << 4;
+ DPRINTF("readback enable bit is set, returning AWACS register %d\t"
+ "value:0x%x\n", awacs_register, return_value);
+
+ return return_value;
+ }
+
+ /* Tell CPU we are ready */
+ return_value = set_part_ready_bit(s->codec_status, 1);
+
+ /* Set Revision to Screamer */
+ return_value = set_revision(return_value);
+
+ /* Set the Manufacturer to Crystal */
+ return_value = set_manufacturer(return_value);
+ DPRINTF("%s() called - returned 0x%x\n", __func__, return_value);
+
+ return return_value;
+}
+
+static uint32_t get_clip_count_reg(ScreamerState *s)
+{
+ DPRINTF("%s() called - returned 0x%x\n", __func__, s->clip_count);
+ uint32_t return_value;
+ return_value = s->clip_count;
+ /* This is reset everytime it is read */
+ s->clip_count = 0;
+ return return_value;
+}
+
+static uint32_t get_byte_swap_reg(ScreamerState *s)
+{
+ DPRINTF("%s() called - returned 0x%x\n", __func__, s->byte_swap);
+ /*
+ * If all you hear is noise, it could be this register reporting the
+ * wrong value.
+ */
+ return s->byte_swap ? 0 : 1;
+}
+
+/*
+ * Returns the frame (sample) count
+ */
+static uint32_t get_frame_count_reg(ScreamerState *s)
+{
+ DPRINTF("%s() called - returned 0x%x\n", __func__, s->frame_count);
+ return s->frame_count;
+}
+
+static uint8_t get_left_vol(uint32_t value)
+{
+ return value & 0xf;
+}
+
+static uint8_t get_right_vol(uint32_t value)
+{
+ return value & 0x3c0 >> 6;
+}
+
+/*
+ * Returns the sampling rate.
+ * If the audio is playing back too fast or too slow, this function may be the
+ * cause.
+ */
+static int get_sampling_rate(ScreamerState *s)
+{
+ uint32_t screamer_rate = s->sound_control & 0x700;
+ int return_value;
+
+ /* All return values are in Hertz */
+ switch (screamer_rate) {
+ case 0x0:
+ return_value = 44100;
+ break;
+ case 0x100:
+ return_value = 29400;
+ break;
+ case 0x200:
+ return_value = 22050;
+ break;
+ case 0x300:
+ return_value = 17640;
+ break;
+ case 0x400:
+ return_value = 14700;
+ break;
+ case 0x500:
+ return_value = 11025;
+ break;
+ case 0x600:
+ return_value = 8820;
+ break;
+ case 0x700:
+ return_value = 7350;
+ break;
+ default:
+ DPRINTF("get_sampling_rate() unknown value: 0x%x\nDefaulting to"
+ " 44100 Hz.\n", screamer_rate);
+ return 44100;
+}
+ DPRINTF("%s() called - returning %dHz\n", __func__, return_value);
+ return return_value;
+}
+
+/**************************** End of getters *************************/
+
+/***************************** Speaker call back *************************/
+
+/* resets the play and buffer position markers */
+static void reset_markers(ScreamerState *s)
+{
+ s->spk_play_position = 0;
+ s->spk_buffer_position = 0;
+}
+
+
+/* Sends the samples to the host for playing */
+static void send_samples_to_host(ScreamerState *s, int max_samples)
+{
+ int write_length, requested_length;
+ requested_length = MIN(max_samples, (s->spk_buffer_position -
+ s->spk_play_position));
+ write_length = AUD_write(s->speaker_voice,
+ &s->spk_buffer[s->spk_play_position],
+ requested_length);
+ DPRINTF("requested length: %d\twrite length: %d\t",
+ requested_length, write_length);
+ s->spk_play_position += write_length;
+ DPRINTF("AUD_write %d/%d\n", s->spk_play_position, s->spk_buffer_position);
+ s->frame_count += write_length;
+}
+
+
+/*
+ * Called by QEMU's audio system to tell the output backend to send samples
+ * from the buffer to the host sound system.
+ * opaque: a pointer to the ScreamerState instance.
+ * max_samples: the number of samples that can be sent to the hardware buffer.
+ */
+static void speaker_callback(void *opaque, int max_samples)
+{
+ ScreamerState *s = (ScreamerState *) opaque;
+
+ /* if we have more samples to play */
+ if (s->spk_buffer_position > 0) {
+ if (s->spk_buffer_position > s->spk_play_position) {
+ DPRINTF("%s() called - max_samples: %d\n", __func__, max_samples);
+ send_samples_to_host(s, max_samples);
+ }
+ if (s->spk_play_position >= s->spk_buffer_position) {
+ DPRINTF("done playing buffer\n");
+ DPRINTF("pp: %d\tbp: %d\n", s->spk_play_position,
+ s->spk_buffer_position);
+ if (s->spk_play_position > s->spk_buffer_position) {
+ DPRINTF("Error detected! - pp > bp\n\a");
+ }
+ reset_markers(s);
+ /* play postponed samples */
+ if (s->dma_io.len > 0) {
+ DPRINTF("playing postponed samples\n");
+ add_to_speaker_buffer(&s->dma_io);
+ return;
+ }
+ }
+ }
+}
+
+/************************* End of speaker call back *************************/
+
+
+/* Opens the speaker's voice */
+static void open_speaker_voice(ScreamerState *s)
+{
+ DPRINTF("%s() called\n", __func__);
+
+ /* if voice is already open return from function */
+ if (s->speaker_voice != NULL) {
+ DPRINTF("closing speaker voice\n");
+ AUD_close_out(&s->card, s->speaker_voice);
+ s->speaker_voice = NULL;
+ }
+ struct audsettings audio_settings;
+ audio_settings.freq = get_sampling_rate(s); /* in hertz */
+ audio_settings.nchannels = 2; /* stereo output */
+ audio_settings.fmt = AUDIO_FORMAT_S16; /* signed 16 bit */
+ audio_settings.endianness = get_byte_swap_reg(s); /* endianness */
+ s->speaker_voice = AUD_open_out(&s->card, s->speaker_voice, SOUND_CHIP_NAME
+ " speaker", s, speaker_callback,
+ &audio_settings);
+ if (!s->speaker_voice) {
+ AUD_log(SOUND_CHIP_NAME, "Out voice could not be opened\n");
+ } else {
+ AUD_set_active_out(s->speaker_voice, true);
+ }
+}
+
+
+/******************************* Setters *************************************/
+
+
+/* Updates QEMU's audio backend settings */
+static void set_QEMU_audio_settings(ScreamerState *s)
+{
+ DPRINTF("%s() called\n", __func__);
+ open_speaker_voice(s);
+}
+
+
+/* Return value: 1 = muted 0 = not muted */
+static int is_muted(ScreamerState *s)
+{
+ int mute_state = s->awacs[1] & SPEAKER_MUTE ? 1 : 0;
+ if (s->awacs[1] & SPEAKER_MUTE) {
+ DPRINTF("speaker is muted\n");
+ } else {
+ DPRINTF("speaker is unmuted\n");
+ }
+
+ if (s->awacs[1] & HEADPHONE_MUTE) {
+ DPRINTF("headphone is muted\n");
+ } else {
+ DPRINTF("headphone is unmuted\n");
+ }
+ return mute_state;
+}
+
+
+/* Converts Screamer's volume system to QEMU's system */
+static int screamer_to_qemu_volume(int x)
+{
+ return -16 * x + 240;
+}
+
+
+/* Sets QEMU's volume. */
+static void set_volume(ScreamerState *s)
+{
+ int should_mute = is_muted(s);
+
+ /* Get Screamer volume values */
+ uint8_t left_vol = get_left_vol(s->awacs[4]);
+ uint8_t right_vol = get_right_vol(s->awacs[4]);
+ DPRINTF("set_volume() called - M:%d\tL:%d\tR:%d\n", should_mute, left_vol,
+ right_vol);
+
+ /* Convert Screamer to QEMU volume values */
+ left_vol = screamer_to_qemu_volume(left_vol);
+ right_vol = screamer_to_qemu_volume(right_vol);
+ DPRINTF("QEMU volume: L:%d\tR:%d\n", left_vol, right_vol);
+ AUD_set_volume_out(s->speaker_voice, should_mute, left_vol, right_vol);
+}
+
+
+/* Sets the sound control register */
+static void set_sound_control_reg(ScreamerState *s, uint32_t value)
+{
+ DPRINTF("set_sound_control_reg() called - value: 0x%x\n", value);
+ s->sound_control = value;
+ set_QEMU_audio_settings(s);
+}
+
+
+/* Used for input gain only - can be ignored for now. */
+static void set_awacs_0_reg(ScreamerState *s, uint32_t new_value)
+{
+ DPRINTF("Settings AWACS register 0 to 0x%x\n", s->awacs[0]);
+ s->awacs[0] = new_value;
+}
+
+
+static void set_awacs_1_reg(ScreamerState *s, uint32_t new_value)
+{
+ DPRINTF("Settings AWACS register 1 to 0x%x\n", new_value);
+
+ s->awacs[1] = new_value;
+
+ /* If recalibration requested */
+ if (new_value & RECALIBRATE) {
+ DPRINTF("Recalibration requested - unimplemented\n");
+ new_value = new_value ^ RECALIBRATE; /* Turn off recalibrate bit */
+ }
+
+ /* If loop thru set - what does this mean? */
+ if (new_value & LOOPTHRU) {
+ DPRINTF("Loopthru enabled - doing nothing\n");
+ }
+
+ /* Set headphone jack mute state */
+ if (new_value & HEADPHONE_MUTE) {
+ DPRINTF("Headphone muted\n");
+ }
+
+ else {
+ DPRINTF("Headphone unmuted\n");
+ }
+
+ if (new_value & SPEAKER_MUTE) {
+ DPRINTF("Speaker muted\n");
+ }
+
+ else {
+ DPRINTF("Speaker unmuted\n");
+ }
+
+ if (new_value & OUTPUT_ZERO) {
+ DPRINTF("output zero set - not sure what this means\n");
+ }
+
+ if (new_value & OUTPUT_ONE) {
+ DPRINTF("output one set - not sure what this means\n");
+ }
+
+ if (new_value & PARALLEL_OUTPUT) {
+ DPRINTF("parallel port enabled - but no parallel port here\n");
+ }
+
+ set_volume(s);
+}
+
+
+/* This is used for headphone volume - not needed */
+static void set_awacs_2_reg(ScreamerState *s, uint32_t new_value)
+{
+ DPRINTF("Settings AWACS register 2 to 0x%x\n"
+ "Ignoring change in headphone volume.\n", s->awacs[2]);
+ s->awacs[2] = new_value;
+}
+
+
+/* Unknown register purpose */
+static void set_awacs_3_reg(ScreamerState *s, uint32_t new_value)
+{
+ DPRINTF("Settings AWACS register 3 to 0x%x\n"
+ "This register has an unknown purpose and does not do anything\n",
+ s->awacs[3]);
+ s->awacs[3] = new_value;
+}
+
+
+/* Mostly deals with speaker volume */
+static void set_awacs_4_reg(ScreamerState *s, uint32_t new_value)
+{
+ DPRINTF("AWACS register 4 write: 0x%x\n", new_value);
+ s->awacs[4] = new_value;
+ set_volume(s);
+}
+
+
+/* This register is about loop thru stuff I don't understand */
+static void set_awacs_5_reg(ScreamerState *s, uint32_t new_value)
+{
+ DPRINTF("Settings AWACS register 5 to 0x%x\n"
+ "Loop thru update ignored.\n", s->awacs[5]);
+ s->awacs[5] = new_value;
+}
+
+
+/* Prints the states of the AWACS power register */
+static void print_power_reg_values(uint32_t value)
+{
+ if ((value & 0x3) == 0) {
+ printf("Screamer run state set\n");
+ }
+ if ((value & 0x3) == 1) {
+ printf("Screamer doze state set\n");
+ }
+ if ((value & 0x3) == 2) {
+ printf("Screamer idle state set\n");
+ }
+}
+
+
+/* Power Magement register */
+static void set_awacs_6_reg(ScreamerState *s, uint32_t new_value)
+{
+ DPRINTF("Settings AWACS register 6 to 0x%x\n"
+ "Power management update ignored.\n", s->awacs[6]);
+ if (DEBUG_SCREAMER) {
+ print_power_reg_values(new_value);
+ }
+ s->awacs[6] = new_value;
+}
+
+
+/* Read Back - repeating something that was sent to this chip? */
+static void set_awacs_7_reg(ScreamerState *s, uint32_t new_value)
+{
+ DPRINTF("Settings AWACS register 7 to 0x%x\n", new_value);
+ s->awacs[7] = new_value;
+}
+
+
+/* Sets the AWACs registers - a.k.a. shadow registers */
+static void set_awacs_register(ScreamerState *s, uint32_t value)
+{
+ int the_register = get_codec_control_address(value);
+
+ switch (the_register) {
+ case 0:
+ set_awacs_0_reg(s, value);
+ break;
+ case 1:
+ set_awacs_1_reg(s, value);
+ break;
+ case 2:
+ set_awacs_2_reg(s, value);
+ break;
+ case 3:
+ set_awacs_3_reg(s, value);
+ break;
+ case 4:
+ set_awacs_4_reg(s, value);
+ break;
+ case 5:
+ set_awacs_5_reg(s, value);
+ break;
+ case 6:
+ set_awacs_6_reg(s, value);
+ break;
+ case 7:
+ set_awacs_7_reg(s, value);
+ break;
+ default:
+ DPRINTF("Unhandled awacs registers %d\n", the_register);
+ }
+}
+
+
+/* Used to set the AWACS registers */
+static void set_codec_control_reg(ScreamerState *s, uint32_t value)
+{
+ DPRINTF("set_codec_control_reg() called - value: 0x%x\n", value);
+ s->codec_control = value;
+ set_awacs_register(s, value);
+}
+
+static void set_codec_status_reg(ScreamerState *s, uint32_t value)
+{
+ DPRINTF("set_codec_status_reg() called - value: 0x%x\n", value);
+ s->codec_status = value;
+}
+
+static void set_clip_count_reg(ScreamerState *s, uint32_t new_value)
+{
+ DPRINTF("set_clip_count_reg() called - value: 0x%x\n", new_value);
+ s->clip_count = new_value;
+}
+
+static void set_byte_swap_reg(ScreamerState *s, uint32_t value)
+{
+ DPRINTF("set_byte_swap_reg() called - value: 0x%x\n", value);
+ s->byte_swap = value;
+}
+
+static void set_frame_count_reg(ScreamerState *s, uint32_t new_value)
+{
+ DPRINTF("%s() called - value: 0x%x\n", __func__, new_value);
+ s->frame_count = new_value;
+}
+
+/*
+ * Sets the busy bit of codec control register.
+ * It is used to tell the CPU to wait.
+ * value: the codec control register's value
+ * bit_value: used to set or disable the busy bit
+ */
+static uint32_t set_busy_bit(uint32_t value, int bit_value)
+{
+ const int busy_bit = 0x01000000;
+ uint32_t return_value;
+ if (bit_value == 1) /* Set this bit */
+ return_value = (value | busy_bit);
+ else /* bit_value == 0 Disable this bit */
+ return_value = (value & ~busy_bit);
+ return return_value;
+}
+
+
+/*
+ * Sets the part ready bit of the codec status register
+ * value: the codec status register's value
+ * bit_value: used to set or disable the part ready bit
+ */
+static uint32_t set_part_ready_bit(uint32_t value, int bit_value)
+{
+ const int part_ready_bit = 0x00400000;
+ uint32_t return_value;
+ if (bit_value == 1) /* Set this bit */
+ return_value = (value | part_ready_bit);
+ else /* bit_value == 0 Disable this bit */
+ return_value = (value & ~part_ready_bit);
+ return return_value;
+}
+
+/* Sets bits 12 and 13 to 1 to indicate the Screamer revision */
+static uint32_t set_revision(uint32_t input_value)
+{
+ uint32_t return_value;
+ return_value = input_value | 0x3000;
+ return return_value;
+}
+
+/* Sets bit 8 to indicate Crystal as the manufacturer */
+static uint32_t set_manufacturer(uint32_t input_value)
+{
+ uint32_t return_value;
+ return_value = input_value | 0x100;
+ return return_value;
+}
+
+
+/************************** End of Setters *********************************/
+
+
+/*************************** DMA functions *********************************/
+
+/*
+ * Sends audio samples from a microphone or line-in to memory.
+ * Used for sound input.
+ * Currently only prevents a deadlock condition with Mac OS 9.
+ */
+static void screamer_to_dma(DBDMA_io *io)
+{
+ DPRINTF("%s() called\n", __func__);
+ ScreamerState *s = (ScreamerState *)io->opaque;
+ DBDMAState *dbs = s->dbdma;
+ DBDMA_channel *ch = &dbs->channels[0x12];
+ ch->regs[DBDMA_STATUS] |= DEAD;
+ ch->regs[DBDMA_STATUS] &= ~ACTIVE;
+ io->dma_end(io);
+ return;
+}
+
+
+static void print_dma_info(DBDMA_io *io)
+{
+ #define RUN 0x8000
+ #define PAUSE 0x4000
+ #define FLUSH 0x2000
+ #define WAKE 0x1000
+ #define DEAD 0x0800
+ #define ACTIVE 0x0400
+ #define BT 0x0100
+ #define DEVSTAT 0x00ff
+
+ /*
+ * RUN and PAUSE are bits under software control only.
+ * FLUSH and WAKE are set by SW and cleared by hardware.
+ * DEAD, ACTIVE and BT are only under hardware control.
+ */
+
+ DBDMA_channel *ch = io->channel;
+ printf("DMA FLAGS: ");
+
+ if (ch->regs[DBDMA_STATUS] & RUN) {
+ printf("RUN ");
+ }
+
+ if (ch->regs[DBDMA_STATUS] & ACTIVE) {
+ printf("ACTIVE ");
+ }
+
+ if (ch->regs[DBDMA_STATUS] & PAUSE) {
+ printf("PAUSE ");
+ }
+
+ if (ch->regs[DBDMA_STATUS] & DEAD) {
+ printf("DEAD ");
+ }
+
+ if (ch->regs[DBDMA_STATUS] & WAKE) {
+ printf("WAKE ");
+ }
+
+ if (ch->regs[DBDMA_STATUS] & BT) {
+ printf("BT ");
+ }
+
+ if (ch->regs[DBDMA_STATUS] & DEVSTAT) {
+ printf("DEVSTAT ");
+ }
+
+ if (ch->regs[DBDMA_STATUS] & FLUSH) {
+ printf("FLUSH ");
+ }
+
+ if (ch->io.processing == true) {
+ printf("processing ");
+ }
+
+ printf("\n");
+}
+
+/* Tell the DMA controller we request more samples */
+static void dma_request(DBDMA_io *io)
+{
+ DPRINTF("%s() called\n", __func__);
+ if (DEBUG_SCREAMER) {
+ print_dma_info(io);
+ }
+ io->len = 0;
+ io->dma_end(io);
+}
+
+
+/* Adds sample data to the buffer */
+static void add_to_speaker_buffer(DBDMA_io *io)
+{
+ ScreamerState *s = (ScreamerState *) io->opaque;
+
+ if (s->spk_buffer_position + io->len > MAX_BUFFER_SIZE) {
+ /* postpone calling these samples until the buffer has been emptied */
+ memcpy(&s->dma_io, io, sizeof(DBDMA_io));
+ return;
+ }
+ dma_memory_read(&address_space_memory, io->addr,
+ &s->spk_buffer[s->spk_buffer_position], io->len);
+ s->spk_buffer_position += io->len;
+ DPRINTF("%s() called - len: %d pos: %d/%d\n", __func__, io->len,
+ s->spk_buffer_position, MAX_BUFFER_SIZE);
+
+ dma_request(io);
+}
+
+/*
+ * Called by the DMA chip to transfer samples from memory to the
+ * Screamer chip.
+ * Used for sound output.
+ */
+static void dma_to_screamer(DBDMA_io *io)
+{
+ add_to_speaker_buffer(io);
+}
+
+
+/*
+ * This will flush the audio buffer of previous audio - eliminating previous
+ * audio playback.
+ */
+static void send_silence_to_speaker(ScreamerState *s)
+{
+ DPRINTF("Silencing audio buffer...\n");
+ int length = MAX_BUFFER_SIZE;
+ s->spk_buffer_position = length;
+ s->spk_play_position = 0;
+ memset(s->spk_buffer, 0, length);
+ s->dma_io.len = 0; /* stop any postponed samples from playing */
+}
+
+
+/* This is called after audio stops playing */
+static void dma_send_flush(DBDMA_io *io)
+{
+ DPRINTF("dma_send_flush() called\n");
+ if (DEBUG_SCREAMER) {
+ print_dma_info(io);
+ }
+ ScreamerState *s = (ScreamerState *)io->opaque;
+ reset_markers(s);
+ send_silence_to_speaker(s);
+ if (io->len > 0) {
+ dma_request(io);
+ }
+}
+
+
+static void dma_receive_flush(DBDMA_io *io)
+{
+ DPRINTF("dma_receive_flush() called\n");
+}
+
+
+/* Set the functions the DMA system will call */
+void screamer_register_dma_functions(ScreamerState *s, void *dbdma,
+ int send_channel, int receive_channel)
+{
+ DPRINTF("%s() called\n", __func__);
+ DPRINTF("send channel: %d\treceive channel: %d\n", send_channel,
+ receive_channel);
+ s->dbdma = dbdma;
+
+ /* Setup the DMA send system */
+ DBDMA_register_channel(s->dbdma, send_channel, s->dma_send_irq,
+ dma_to_screamer, dma_send_flush, s);
+
+ /* Setup the DMA receive system */
+ DBDMA_register_channel(s->dbdma, receive_channel, s->dma_receive_irq,
+ screamer_to_dma, dma_receive_flush, s);
+}
+
+/************************* End of DMA functions **************************/
+
+/* Resets this sound chip */
+static void screamer_reset(DeviceState *d)
+{
+ DPRINTF("screamer_reset() called\n");
+ ScreamerState *s = SCREAMER(d);
+ set_sound_control_reg(s, 0);
+ set_codec_control_reg(s, 0);
+ set_codec_status_reg(s, 0);
+ set_clip_count_reg(s, 0);
+ set_byte_swap_reg(s, 0);
+ set_frame_count_reg(s, 0);
+ int i, num_awacs_regs = 8;
+ for (i = 0; i < num_awacs_regs; i++) {
+ s->awacs[i] = 0;
+ }
+ set_QEMU_audio_settings(s);
+ reset_markers(s);
+ s->dma_io.len = 0;
+}
+
+/* Called when the CPU reads the memory addresses assigned to Screamer */
+static uint64_t screamer_mmio_read(void *opaque, hwaddr addr, unsigned size)
+{
+ ScreamerState *state = opaque;
+ uint32_t return_value;
+
+ addr = addr >> 4;
+ switch (addr) {
+ case SOUND_CONTROL_REG:
+ return_value = get_sound_control_reg(state);
+ break;
+ case CODEC_CONTROL_REG:
+ return_value = get_codec_control_reg(state);
+ break;
+ case CODEC_STATUS_REG:
+ return_value = get_codec_status_reg(state);
+ break;
+ case CLIP_COUNT_REG:
+ return_value = get_clip_count_reg(state);
+ break;
+ case BYTE_SWAP_REG:
+ return_value = get_byte_swap_reg(state);
+ break;
+ case FRAME_COUNT_REG:
+ return_value = get_frame_count_reg(state);
+ break;
+ default:
+ DPRINTF("Unknown register read - addr:%" HWADDR_PRIx "\tsize:%d\n",
+ addr, size);
+ return_value = 12021981; /* Value used for debugging purposes */
+ }
+ DPRINTF("screamer_mmio_read() called addr: %" HWADDR_PRIx " size: %d",
+ addr >> 4, size);
+ DPRINTF(" returning 0x%x\n", return_value);
+ return return_value;
+}
+
+
+/* Called when the CPU writes to the memory addresses assigned to Screamer */
+static void screamer_mmio_write(void *opaque, hwaddr addr, uint64_t raw_value,
+ unsigned size)
+{
+ DPRINTF("screamer_mmio_write() called - size: %d\n", size);
+ ScreamerState *state = opaque;
+ uint32_t value = raw_value & 0xffffffff;
+ addr = addr >> 4;
+
+ switch (addr) {
+ case SOUND_CONTROL_REG:
+ set_sound_control_reg(state, value);
+ break;
+ case CODEC_CONTROL_REG:
+ set_codec_control_reg(state, value);
+ break;
+ case CODEC_STATUS_REG:
+ set_codec_status_reg(state, value);
+ break;
+ case CLIP_COUNT_REG:
+ set_clip_count_reg(state, value);
+ break;
+ case BYTE_SWAP_REG:
+ set_byte_swap_reg(state, value);
+ break;
+ case FRAME_COUNT_REG:
+ set_frame_count_reg(state, value);
+ break;
+ default:
+ DPRINTF("Unknown register write - addr:%" HWADDR_PRIx "\tvalue:%d\n",
+ addr, value);
+ }
+}
+
+/* Used for memory_region_init_io() for memory mapped I/O */
+static const MemoryRegionOps screamer_ops = {
+ .read = screamer_mmio_read,
+ .write = screamer_mmio_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 4
+ }
+};
+
+/* Called when the device has become active */
+static void screamer_realize(DeviceState *dev, Error **errp)
+{
+ DPRINTF("screamer_realize() called\n");
+ screamer_reset(dev);
+}
+
+
+/*
+ * Called when an instance of the Screamer device is created.
+ * Also called when this HMP command is called: device_add screamer
+ */
+static void screamer_init(Object *obj)
+{
+ DPRINTF("screamer_init() called\n");
+
+ ScreamerState *s = (ScreamerState *)obj;
+ SysBusDevice *d = SYS_BUS_DEVICE(obj);
+ const int region_size = 5 * 32;
+
+ /* Makes the read and write ops work */
+ memory_region_init_io(&s->io_memory_region, OBJECT(s),
+ &screamer_ops, s, SOUND_CHIP_NAME, region_size);
+
+ /* Sets the SysBusDevice's memory property */
+ sysbus_init_mmio(d, &s->io_memory_region);
+
+ /* Setup all the interrupt requests */
+ sysbus_init_irq(d, &s->irq);
+ sysbus_init_irq(d, &s->dma_send_irq);
+ sysbus_init_irq(d, &s->dma_receive_irq);
+
+ /* Registers Screamer with QEMU's audio system */
+ AUD_register_card(SOUND_CHIP_NAME, &s->card);
+}
+
+
+/*
+ * When saving and restoring the state of the VM, this is used to save and
+ * restore the registers.
+ */
+static const VMStateDescription vmstate_screamer = {
+ .name = "Screamer",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT16_ARRAY(awacs, ScreamerState, 8), /* 8 AWACS registers */
+ VMSTATE_UINT32(sound_control, ScreamerState),
+ VMSTATE_UINT32(codec_control, ScreamerState),
+ VMSTATE_UINT32(codec_status, ScreamerState),
+ VMSTATE_UINT32(clip_count, ScreamerState),
+ VMSTATE_UINT32(byte_swap, ScreamerState),
+ VMSTATE_UINT32(frame_count, ScreamerState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+
+/*
+ * Sets the class data. It is like polymorphism and inheritance in object
+ * oriented languages.
+ */
+static void screamer_class_init(ObjectClass *class, void *data)
+{
+ DPRINTF("screamer_class_init() called\n");
+ DeviceClass *dc = DEVICE_CLASS(class);
+ dc->realize = screamer_realize;
+ dc->reset = screamer_reset;
+ dc->desc = "Apple Screamer";
+ dc->vmsd = &vmstate_screamer;
+ dc->hotpluggable = false;
+}
+
+/* Used for QOM function registration */
+static const TypeInfo screamer_info = {
+ .name = "screamer",
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(ScreamerState),
+ .instance_init = screamer_init,
+ .class_init = screamer_class_init,
+};
+
+/* QOM registration of above functions for calling */
+static void screamer_register_types(void)
+{
+ DPRINTF("screamer_register_types() called\n");
+ type_register_static(&screamer_info);
+}
+
+/* QEMU Object Model (QOM) stuff */
+type_init(screamer_register_types)
diff --git a/hw/misc/macio/macio.c b/hw/misc/macio/macio.c
index 79222192e8..3307fa3818 100644
--- a/hw/misc/macio/macio.c
+++ b/hw/misc/macio/macio.c
@@ -37,6 +37,7 @@
#include "hw/intc/heathrow_pic.h"
#include "sysemu/sysemu.h"
#include "trace.h"
+#include "include/hw/audio/screamer.h"
/* Note: this code is strongly inspirated from the corresponding code
* in PearPC */
@@ -109,7 +110,10 @@ static void macio_common_realize(PCIDevice *d, Error
**errp)
SysBusDevice *sysbus_dev;
Error *err = NULL;
- object_property_set_bool(OBJECT(&s->dbdma), true, "realized", &err);
+ const char *realized_property = "realized";
+ bool new_value = true;
+ object_property_set_bool(OBJECT(&s->dbdma), new_value, realized_property,
+ &err);
if (err) {
error_propagate(errp, err);
return;
@@ -117,6 +121,19 @@ static void macio_common_realize(PCIDevice *d, Error
**errp)
sysbus_dev = SYS_BUS_DEVICE(&s->dbdma);
memory_region_add_subregion(&s->bar, 0x08000,
sysbus_mmio_get_region(sysbus_dev, 0));
+ object_property_set_bool(OBJECT(&s->screamer), true, "realized", &err);
+ if (err) {
+ error_propagate(errp, err);
+ return;
+ }
+
+ /* Add the screamer sound chip */
+ sysbus_dev = SYS_BUS_DEVICE(&s->screamer);
+ const int offset = 0x14000; /* Offset from base address register (bar) */
+ const int region_number = 0; /* which memory region to use */
+ memory_region_add_subregion(&s->bar, offset,
+ sysbus_mmio_get_region(sysbus_dev,
+ region_number));
qdev_prop_set_uint32(DEVICE(&s->escc), "disabled", 0);
qdev_prop_set_uint32(DEVICE(&s->escc), "frequency", ESCC_CLOCK);
@@ -386,6 +403,19 @@ static void macio_newworld_realize(PCIDevice *d, Error
**errp)
memory_region_add_subregion(&s->bar, 0x16000,
sysbus_mmio_get_region(sysbus_dev, 0));
}
+
+ /* Screamer Sound Chip */
+ const int gpio_0 = 0;
+ const int gpio_1 = 1;
+ const int transmit_channel = 0x10;
+ const int receive_channel = 0x12;
+ sysbus_dev = SYS_BUS_DEVICE(&s->screamer);
+ sysbus_connect_irq(sysbus_dev, gpio_0, qdev_get_gpio_in(pic_dev,
+ NEWWORLD_SCREAMER_IRQ));
+ sysbus_connect_irq(sysbus_dev, gpio_1, qdev_get_gpio_in(pic_dev,
+ NEWWORLD_SCREAMER_DMA_IRQ));
+ screamer_register_dma_functions(SCREAMER(sysbus_dev), &s->dbdma,
+ transmit_channel, receive_channel);
}
static void macio_newworld_init(Object *obj)
@@ -420,6 +450,9 @@ static void macio_instance_init(Object *obj)
TYPE_MAC_DBDMA);
macio_init_child_obj(s, "escc", &s->escc, sizeof(s->escc), TYPE_ESCC);
+
+ macio_init_child_obj(s, SOUND_CHIP_NAME, &s->screamer, sizeof(s->screamer),
+ TYPE_SCREAMER);
}
static const VMStateDescription vmstate_macio_oldworld = {
diff --git a/hw/ppc/Kconfig b/hw/ppc/Kconfig
index 354828bf13..4ffc3a1c16 100644
--- a/hw/ppc/Kconfig
+++ b/hw/ppc/Kconfig
@@ -104,6 +104,7 @@ config MAC_NEWWORLD
select MAC_PMU
select UNIN_PCI
select FW_CFG_PPC
+ select SCREAMER
config E500
bool
diff --git a/hw/ppc/mac.h b/hw/ppc/mac.h
index 6af87d1fa0..c65f2fd15f 100644
--- a/hw/ppc/mac.h
+++ b/hw/ppc/mac.h
@@ -34,6 +34,8 @@
#include "hw/misc/mos6522.h"
#include "hw/pci/pci_host.h"
#include "hw/pci-host/uninorth.h"
+#include "hw/ppc/mac_dbdma.h"
+#include "audio/audio.h"
/* SMP is not enabled, for now */
#define MAX_CPUS 1
@@ -68,6 +70,9 @@
#define NEWWORLD_IDE1_DMA_IRQ 0x3
#define NEWWORLD_EXTING_GPIO1 0x2f
#define NEWWORLD_EXTING_GPIO9 0x37
+#define NEWWORLD_SCREAMER_IRQ 0x18
+#define NEWWORLD_SCREAMER_DMA_IRQ 0x9
+#define NEWWORLD_SCREAMER_RX_IRQ 0xa
/* Core99 machine */
#define TYPE_CORE99_MACHINE MACHINE_TYPE_NAME("mac99")
diff --git a/include/hw/audio/screamer.h b/include/hw/audio/screamer.h
new file mode 100644
index 0000000000..7155541688
--- /dev/null
+++ b/include/hw/audio/screamer.h
@@ -0,0 +1,42 @@
+/*
+ * File: screamer.h
+ * Description: header file to the hw/audio/screamer.c file
+ */
+
+#ifndef screamer_h
+#define screamer_h
+
+#include <inttypes.h>
+#include "audio/audio.h"
+#include "hw/ppc/mac_dbdma.h"
+
+#define TYPE_SCREAMER "screamer"
+#define SCREAMER(obj) OBJECT_CHECK(ScreamerState, (obj), TYPE_SCREAMER)
+#define SOUND_CHIP_NAME "Screamer Sound Chip"
+#define MAX_BUFFER_SIZE (128 * 64)
+
+typedef struct ScreamerState {
+ SysBusDevice parent_obj;
+ uint16_t awacs[8]; /* Shadow/awacs registers */
+ uint32_t sound_control;
+ uint32_t codec_control;
+ uint32_t codec_status;
+ uint32_t clip_count;
+ uint32_t byte_swap;
+ uint32_t frame_count;
+ SWVoiceOut *speaker_voice;
+ DBDMAState *dbdma;
+ qemu_irq dma_send_irq;
+ qemu_irq dma_receive_irq;
+ qemu_irq irq;
+ QEMUSoundCard card;
+ MemoryRegion io_memory_region;
+ uint8_t spk_buffer[MAX_BUFFER_SIZE];
+ uint16_t spk_buffer_position, spk_play_position;
+ DBDMA_io dma_io;
+} ScreamerState;
+
+void screamer_register_dma_functions(ScreamerState *s, void *dbdma,
+ int send_channel, int receive_channel);
+
+#endif /* screamer_h */
diff --git a/include/hw/misc/macio/macio.h b/include/hw/misc/macio/macio.h
index 070a694eb5..81ad552d61 100644
--- a/include/hw/misc/macio/macio.h
+++ b/include/hw/misc/macio/macio.h
@@ -35,6 +35,7 @@
#include "hw/ppc/mac.h"
#include "hw/ppc/mac_dbdma.h"
#include "hw/ppc/openpic.h"
+#include "hw/audio/screamer.h"
/* MacIO virtual bus */
#define TYPE_MACIO_BUS "macio-bus"
@@ -86,6 +87,7 @@ typedef struct MacIOState {
PMUState pmu;
DBDMAState dbdma;
ESCCState escc;
+ ScreamerState screamer;
uint64_t frequency;
} MacIOState;
--
2.14.3 (Apple Git-98)
