audio: add dummy screamer device

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>

hw/audio/Kconfig

@@ -55,3 +55,9 @@ config VIRTIO_SND
     bool
     default y
     depends on VIRTIO
+
+config MARVELL_88W8618
+    bool
+
+config SCREAMER
+    bool

hw/audio/meson.build

@@ -11,6 +11,7 @@ system_ss.add(when: 'CONFIG_MARVELL_88W8618', if_true: files('marvell_88w8618.c'
 system_ss.add(when: 'CONFIG_PCSPK', if_true: files('pcspk.c'))
 system_ss.add(when: 'CONFIG_PL041', if_true: files('pl041.c', 'lm4549.c'))
 system_ss.add(when: 'CONFIG_SB16', if_true: files('sb16.c'))
+system_ss.add(when: 'CONFIG_SCREAMER', if_true: files('screamer.c'))
 system_ss.add(when: 'CONFIG_VT82C686', if_true: files('via-ac97.c'))
 system_ss.add(when: 'CONFIG_WM8750', if_true: files('wm8750.c'))
 system_ss.add(when: ['CONFIG_VIRTIO_SND', 'CONFIG_VIRTIO'], if_true: files('virtio-snd.c'))

hw/audio/screamer.c

@@ -0,0 +1,108 @@
+/*
+ * QEMU PowerMac Awacs Screamer device support
+ *
+ * Copyright (c) 2016 Mark Cave-Ayland
+ *
+ * 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 "qemu/osdep.h"
+#include "hw/hw.h"
+#include "hw/audio/screamer.h"
+#include "hw/qdev-properties.h"
+#include "qemu/timer.h"
+#include "sysemu/sysemu.h"
+#include "qemu/cutils.h"
+#include "qemu/log.h"
+
+/* debug screamer */
+//#define DEBUG_SCREAMER
+
+#ifdef DEBUG_SCREAMER
+#define SCREAMER_DPRINTF(fmt, ...)                                  \
+    do { printf("SCREAMER: " fmt , ## __VA_ARGS__); } while (0)
+#else
+#define SCREAMER_DPRINTF(fmt, ...)
+#endif
+
+
+static void screamer_reset(DeviceState *dev)
+{
+    return;
+}
+
+static void screamer_realizefn(DeviceState *dev, Error **errp)
+{
+    return;
+}
+
+static uint64_t screamer_read(void *opaque, hwaddr addr, unsigned size)
+{
+    return 0;
+}
+
+static void screamer_write(void *opaque, hwaddr addr,
+                           uint64_t val, unsigned size)
+{
+    return;
+}
+
+static const MemoryRegionOps screamer_ops = {
+    .read = screamer_read,
+    .write = screamer_write,
+    .endianness = DEVICE_BIG_ENDIAN
+};
+
+static void screamer_initfn(Object *obj)
+{
+    SysBusDevice *d = SYS_BUS_DEVICE(obj);
+    ScreamerState *s = SCREAMER(obj);
+
+    memory_region_init_io(&s->mem, obj, &screamer_ops, s, "screamer", 0x2000);
+    sysbus_init_mmio(d, &s->mem);
+    sysbus_init_irq(d, &s->irq);
+}
+
+static Property screamer_properties[] = {
+    DEFINE_PROP_END_OF_LIST()
+};
+
+static void screamer_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+
+    dc->realize = screamer_realizefn;
+    dc->reset = screamer_reset;
+    device_class_set_props(dc, screamer_properties);
+}
+
+static const TypeInfo screamer_type_info = {
+    .name = TYPE_SCREAMER,
+    .parent = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(ScreamerState),
+    .instance_init = screamer_initfn,
+    .class_init = screamer_class_init,
+};
+
+static void screamer_register_types(void)
+{
+    type_register_static(&screamer_type_info);
+}
+
+type_init(screamer_register_types)

hw/ppc/Kconfig

@@ -136,6 +136,7 @@ config MAC_OLDWORLD
     select HEATHROW_PIC
     select MACIO
     select FW_CFG_PPC
+    select SCREAMER
 
 config MAC_NEWWORLD
     bool
@@ -151,6 +152,7 @@ config MAC_NEWWORLD
     select MAC_PMU
     select UNIN_PCI
     select FW_CFG_PPC
+    select SCREAMER
 
 config E500
     bool

include/hw/audio/screamer.h

@@ -0,0 +1,43 @@
+/*
+ * QEMU PowerMac Awacs Screamer device support
+ *
+ * Copyright (c) 2016 Mark Cave-Ayland
+ *
+ * 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.
+ */
+
+#ifndef HW_AUDIO_SCREAMER_H
+#define HW_AUDIO_SCREAMER_H
+
+#include "qemu/osdep.h"
+#include "hw/sysbus.h"
+
+#define TYPE_SCREAMER "screamer"
+OBJECT_DECLARE_SIMPLE_TYPE(ScreamerState, SCREAMER)
+
+struct ScreamerState {
+    /*< private >*/
+    SysBusDevice parent_obj;
+
+    /*< public >*/
+    MemoryRegion mem;
+    qemu_irq irq;
+};
+
+#endif