Add Intel HD Audio support to qemu.

This patch adds three devices to qemu:

intel-hda
	Intel HD Audio Controller, the PCI device.  Provides a HDA bus.
	Emulates ICH6 at the moment.  Adding a ICH9 PCIE
	variant shouldn't be hard.

hda-duplex
	HDA Codec.  Attaches to the HDA bus.  Supports 16bit stereo,
	rates 16k -> 96k, playback, recording and volume control
	(with CONFIG_MIXEMU=y).

hda-output
	HDA Codec without recording support.  Subset of the hda-duplex
	codec.  Use this if you don't want your guests access your mic.

Usage: add '-device intel-hda -device hda-duplex' to your command line.

Tested guests:
 * Linux works.
 * Win7 works.
 * DOS (mpxplay) works.
 * WinXP doesn't work.

[ v2 changes ]
 * Fixed endianess, big endian hosts work now.
 * Fixed some emulation bugs.
 * Added immediate command emulation.
 * Added vmstate support.
 * Make it behave like all other sound card drivers:
   - can be configured via '--audio-card-list=hda'
   - can be added to a VM using '-soundhw hda'
 * Code style fixups.
 * Zapped guest-triggerable asserts.
 * Handle partial reads/writes of audio data correctly.

Cc: malc <av1474@comtv.ru>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: malc <av1474@comtv.ru>

1 files changed, 61 insertions, 0 deletions

diff --git a/hw/intel-hda.h b/hw/intel-hda.h
new file mode 100644
index 0000000000..ba290ec850
--- /dev/null
+++ b/hw/intel-hda.h
@@ -0,0 +1,61 @@
+#ifndef HW_INTEL_HDA_H
+#define HW_INTEL_HDA_H
+
+#include "qdev.h"
+
+/* --------------------------------------------------------------------- */
+/* hda bus                                                               */
+
+typedef struct HDACodecBus HDACodecBus;
+typedef struct HDACodecDevice HDACodecDevice;
+typedef struct HDACodecDeviceInfo HDACodecDeviceInfo;
+
+typedef void (*hda_codec_response_func)(HDACodecDevice *dev,
+                                        bool solicited, uint32_t response);
+typedef bool (*hda_codec_xfer_func)(HDACodecDevice *dev,
+                                    uint32_t stnr, bool output,
+                                    uint8_t *buf, uint32_t len);
+
+struct HDACodecBus {
+    BusState qbus;
+    uint32_t next_cad;
+    hda_codec_response_func response;
+    hda_codec_xfer_func xfer;
+};
+
+struct HDACodecDevice {
+    DeviceState         qdev;
+    HDACodecDeviceInfo  *info;
+    uint32_t            cad;    /* codec address */
+};
+
+struct HDACodecDeviceInfo {
+    DeviceInfo qdev;
+    int (*init)(HDACodecDevice *dev);
+    void (*command)(HDACodecDevice *dev, uint32_t nid, uint32_t data);
+    void (*stream)(HDACodecDevice *dev, uint32_t stnr, bool running);
+};
+
+void hda_codec_bus_init(DeviceState *dev, HDACodecBus *bus,
+                        hda_codec_response_func response,
+                        hda_codec_xfer_func xfer);
+void hda_codec_register(HDACodecDeviceInfo *info);
+HDACodecDevice *hda_codec_find(HDACodecBus *bus, uint32_t cad);
+
+void hda_codec_response(HDACodecDevice *dev, bool solicited, uint32_t response);
+bool hda_codec_xfer(HDACodecDevice *dev, uint32_t stnr, bool output,
+                    uint8_t *buf, uint32_t len);
+
+/* --------------------------------------------------------------------- */
+
+#define dprint(_dev, _level, _fmt, ...)                                 \
+    do {                                                                \
+        if (_dev->debug >= _level) {                                    \
+            fprintf(stderr, "%s: ", _dev->name);                        \
+            fprintf(stderr, _fmt, ## __VA_ARGS__);                      \
+        }                                                               \
+    } while (0)
+
+/* --------------------------------------------------------------------- */
+
+#endif