Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>

1 files changed, 213 insertions, 0 deletions

diff --git a/qemu/hw/audio/pcspk.c b/qemu/hw/audio/pcspk.c
new file mode 100644
index 000000000..5266fb545
--- /dev/null
+++ b/qemu/hw/audio/pcspk.c
@@ -0,0 +1,213 @@
+/*
+ * QEMU PC speaker emulation
+ *
+ * Copyright (c) 2006 Joachim Henke
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "hw/hw.h"
+#include "hw/i386/pc.h"
+#include "hw/isa/isa.h"
+#include "hw/audio/audio.h"
+#include "audio/audio.h"
+#include "qemu/timer.h"
+#include "hw/timer/i8254.h"
+#include "hw/audio/pcspk.h"
+
+#define PCSPK_BUF_LEN 1792
+#define PCSPK_SAMPLE_RATE 32000
+#define PCSPK_MAX_FREQ (PCSPK_SAMPLE_RATE >> 1)
+#define PCSPK_MIN_COUNT ((PIT_FREQ + PCSPK_MAX_FREQ - 1) / PCSPK_MAX_FREQ)
+
+#define PC_SPEAKER(obj) OBJECT_CHECK(PCSpkState, (obj), TYPE_PC_SPEAKER)
+
+typedef struct {
+    ISADevice parent_obj;
+
+    MemoryRegion ioport;
+    uint32_t iobase;
+    uint8_t sample_buf[PCSPK_BUF_LEN];
+    QEMUSoundCard card;
+    SWVoiceOut *voice;
+    void *pit;
+    unsigned int pit_count;
+    unsigned int samples;
+    unsigned int play_pos;
+    int data_on;
+    int dummy_refresh_clock;
+} PCSpkState;
+
+static const char *s_spk = "pcspk";
+static PCSpkState *pcspk_state;
+
+static inline void generate_samples(PCSpkState *s)
+{
+    unsigned int i;
+
+    if (s->pit_count) {
+        const uint32_t m = PCSPK_SAMPLE_RATE * s->pit_count;
+        const uint32_t n = ((uint64_t)PIT_FREQ << 32) / m;
+
+        /* multiple of wavelength for gapless looping */
+        s->samples = (PCSPK_BUF_LEN * PIT_FREQ / m * m / (PIT_FREQ >> 1) + 1) >> 1;
+        for (i = 0; i < s->samples; ++i)
+            s->sample_buf[i] = (64 & (n * i >> 25)) - 32;
+    } else {
+        s->samples = PCSPK_BUF_LEN;
+        for (i = 0; i < PCSPK_BUF_LEN; ++i)
+            s->sample_buf[i] = 128; /* silence */
+    }
+}
+
+static void pcspk_callback(void *opaque, int free)
+{
+    PCSpkState *s = opaque;
+    PITChannelInfo ch;
+    unsigned int n;
+
+    pit_get_channel_info(s->pit, 2, &ch);
+
+    if (ch.mode != 3) {
+        return;
+    }
+
+    n = ch.initial_count;
+    /* avoid frequencies that are not reproducible with sample rate */
+    if (n < PCSPK_MIN_COUNT)
+        n = 0;
+
+    if (s->pit_count != n) {
+        s->pit_count = n;
+        s->play_pos = 0;
+        generate_samples(s);
+    }
+
+    while (free > 0) {
+        n = audio_MIN(s->samples - s->play_pos, (unsigned int)free);
+        n = AUD_write(s->voice, &s->sample_buf[s->play_pos], n);
+        if (!n)
+            break;
+        s->play_pos = (s->play_pos + n) % s->samples;
+        free -= n;
+    }
+}
+
+static int pcspk_audio_init(ISABus *bus)
+{
+    PCSpkState *s = pcspk_state;
+    struct audsettings as = {PCSPK_SAMPLE_RATE, 1, AUD_FMT_U8, 0};
+
+    AUD_register_card(s_spk, &s->card);
+
+    s->voice = AUD_open_out(&s->card, s->voice, s_spk, s, pcspk_callback, &as);
+    if (!s->voice) {
+        AUD_log(s_spk, "Could not open voice\n");
+        return -1;
+    }
+
+    return 0;
+}
+
+static uint64_t pcspk_io_read(void *opaque, hwaddr addr,
+                              unsigned size)
+{
+    PCSpkState *s = opaque;
+    PITChannelInfo ch;
+
+    pit_get_channel_info(s->pit, 2, &ch);
+
+    s->dummy_refresh_clock ^= (1 << 4);
+
+    return ch.gate | (s->data_on << 1) | s->dummy_refresh_clock |
+       (ch.out << 5);
+}
+
+static void pcspk_io_write(void *opaque, hwaddr addr, uint64_t val,
+                           unsigned size)
+{
+    PCSpkState *s = opaque;
+    const int gate = val & 1;
+
+    s->data_on = (val >> 1) & 1;
+    pit_set_gate(s->pit, 2, gate);
+    if (s->voice) {
+        if (gate) /* restart */
+            s->play_pos = 0;
+        AUD_set_active_out(s->voice, gate & s->data_on);
+    }
+}
+
+static const MemoryRegionOps pcspk_io_ops = {
+    .read = pcspk_io_read,
+    .write = pcspk_io_write,
+    .impl = {
+        .min_access_size = 1,
+        .max_access_size = 1,
+    },
+};
+
+static void pcspk_initfn(Object *obj)
+{
+    PCSpkState *s = PC_SPEAKER(obj);
+
+    memory_region_init_io(&s->ioport, OBJECT(s), &pcspk_io_ops, s, "pcspk", 1);
+}
+
+static void pcspk_realizefn(DeviceState *dev, Error **errp)
+{
+    ISADevice *isadev = ISA_DEVICE(dev);
+    PCSpkState *s = PC_SPEAKER(dev);
+
+    isa_register_ioport(isadev, &s->ioport, s->iobase);
+
+    pcspk_state = s;
+}
+
+static Property pcspk_properties[] = {
+    DEFINE_PROP_UINT32("iobase", PCSpkState, iobase,  -1),
+    DEFINE_PROP_PTR("pit", PCSpkState, pit),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void pcspk_class_initfn(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->realize = pcspk_realizefn;
+    set_bit(DEVICE_CATEGORY_SOUND, dc->categories);
+    dc->props = pcspk_properties;
+    /* Reason: pointer property "pit", realize sets global pcspk_state */
+    dc->cannot_instantiate_with_device_add_yet = true;
+}
+
+static const TypeInfo pcspk_info = {
+    .name           = TYPE_PC_SPEAKER,
+    .parent         = TYPE_ISA_DEVICE,
+    .instance_size  = sizeof(PCSpkState),
+    .instance_init  = pcspk_initfn,
+    .class_init     = pcspk_class_initfn,
+};
+
+static void pcspk_register(void)
+{
+    type_register_static(&pcspk_info);
+    isa_register_soundhw("pcspk", "PC speaker", pcspk_audio_init);
+}
+type_init(pcspk_register)