1 /* SPDX-License-Identifier: GPL-2.0 */
6 #ifndef __SOUND_HDAUDIO_H
7 #define __SOUND_HDAUDIO_H
9 #include <linux/device.h>
10 #include <linux/interrupt.h>
11 #include <linux/pm_runtime.h>
12 #include <linux/timecounter.h>
13 #include <sound/core.h>
14 #include <sound/pcm.h>
15 #include <sound/memalloc.h>
16 #include <sound/hda_verbs.h>
17 #include <drm/i915_component.h>
20 typedef u16 hda_nid_t;
26 struct hdac_widget_tree;
32 extern struct bus_type snd_hda_bus_type;
40 unsigned int elem_size;
41 unsigned int alloc_align;
46 * HD-audio codec base device
52 unsigned int addr; /* codec address */
53 struct list_head list; /* list point for bus codec_list */
55 hda_nid_t afg; /* AFG node id */
56 hda_nid_t mfg; /* MFG node id */
59 unsigned int vendor_id;
60 unsigned int subsystem_id;
61 unsigned int revision_id;
62 unsigned int afg_function_id;
63 unsigned int mfg_function_id;
64 unsigned int afg_unsol:1;
65 unsigned int mfg_unsol:1;
67 unsigned int power_caps; /* FG power caps */
69 const char *vendor_name; /* codec vendor name */
70 const char *chip_name; /* codec chip name */
72 /* verb exec op override */
73 int (*exec_verb)(struct hdac_device *dev, unsigned int cmd,
74 unsigned int flags, unsigned int *res);
77 unsigned int num_nodes;
78 hda_nid_t start_nid, end_nid;
81 atomic_t in_pm; /* suspend/resume being performed */
84 struct mutex widget_lock;
85 struct hdac_widget_tree *widgets;
88 struct regmap *regmap;
89 struct snd_array vendor_verbs;
90 bool lazy_cache:1; /* don't wake up for writes */
91 bool caps_overwriting:1; /* caps overwrite being in process */
92 bool cache_coef:1; /* cache COEF read/write too */
95 /* device/driver type used for matching */
103 SND_SKL_PCI_BIND_AUTO, /* automatic selection based on pci class */
104 SND_SKL_PCI_BIND_LEGACY,/* bind only with legacy driver */
105 SND_SKL_PCI_BIND_ASOC /* bind only with ASoC driver */
110 HDA_INPUT, HDA_OUTPUT
113 #define dev_to_hdac_dev(_dev) container_of(_dev, struct hdac_device, dev)
115 int snd_hdac_device_init(struct hdac_device *dev, struct hdac_bus *bus,
116 const char *name, unsigned int addr);
117 void snd_hdac_device_exit(struct hdac_device *dev);
118 int snd_hdac_device_register(struct hdac_device *codec);
119 void snd_hdac_device_unregister(struct hdac_device *codec);
120 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name);
121 int snd_hdac_codec_modalias(struct hdac_device *hdac, char *buf, size_t size);
123 int snd_hdac_refresh_widgets(struct hdac_device *codec, bool sysfs);
125 unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
126 unsigned int verb, unsigned int parm);
127 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
128 unsigned int flags, unsigned int *res);
129 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
130 unsigned int verb, unsigned int parm, unsigned int *res);
131 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
133 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
135 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
136 unsigned int parm, unsigned int val);
137 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
138 hda_nid_t *conn_list, int max_conns);
139 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
140 hda_nid_t *start_id);
141 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
142 unsigned int channels,
143 snd_pcm_format_t format,
145 unsigned short spdif_ctls);
146 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
147 u32 *ratesp, u64 *formatsp, unsigned int *bpsp);
148 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
149 unsigned int format);
151 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
152 int flags, unsigned int verb, unsigned int parm);
153 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
154 int flags, unsigned int verb, unsigned int parm);
155 bool snd_hdac_check_power_state(struct hdac_device *hdac,
156 hda_nid_t nid, unsigned int target_state);
157 unsigned int snd_hdac_sync_power_state(struct hdac_device *hdac,
158 hda_nid_t nid, unsigned int target_state);
160 * snd_hdac_read_parm - read a codec parameter
161 * @codec: the codec object
162 * @nid: NID to read a parameter
163 * @parm: parameter to read
165 * Returns -1 for error. If you need to distinguish the error more
166 * strictly, use _snd_hdac_read_parm() directly.
168 static inline int snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid,
173 return _snd_hdac_read_parm(codec, nid, parm, &val) < 0 ? -1 : val;
177 int snd_hdac_power_up(struct hdac_device *codec);
178 int snd_hdac_power_down(struct hdac_device *codec);
179 int snd_hdac_power_up_pm(struct hdac_device *codec);
180 int snd_hdac_power_down_pm(struct hdac_device *codec);
181 int snd_hdac_keep_power_up(struct hdac_device *codec);
183 /* call this at entering into suspend/resume callbacks in codec driver */
184 static inline void snd_hdac_enter_pm(struct hdac_device *codec)
186 atomic_inc(&codec->in_pm);
189 /* call this at leaving from suspend/resume callbacks in codec driver */
190 static inline void snd_hdac_leave_pm(struct hdac_device *codec)
192 atomic_dec(&codec->in_pm);
195 static inline bool snd_hdac_is_in_pm(struct hdac_device *codec)
197 return atomic_read(&codec->in_pm);
200 static inline bool snd_hdac_is_power_on(struct hdac_device *codec)
202 return !pm_runtime_suspended(&codec->dev);
205 static inline int snd_hdac_power_up(struct hdac_device *codec) { return 0; }
206 static inline int snd_hdac_power_down(struct hdac_device *codec) { return 0; }
207 static inline int snd_hdac_power_up_pm(struct hdac_device *codec) { return 0; }
208 static inline int snd_hdac_power_down_pm(struct hdac_device *codec) { return 0; }
209 static inline int snd_hdac_keep_power_up(struct hdac_device *codec) { return 0; }
210 static inline void snd_hdac_enter_pm(struct hdac_device *codec) {}
211 static inline void snd_hdac_leave_pm(struct hdac_device *codec) {}
212 static inline bool snd_hdac_is_in_pm(struct hdac_device *codec) { return 0; }
213 static inline bool snd_hdac_is_power_on(struct hdac_device *codec) { return 1; }
217 * HD-audio codec base driver
220 struct device_driver driver;
222 const struct hda_device_id *id_table;
223 int (*match)(struct hdac_device *dev, struct hdac_driver *drv);
224 void (*unsol_event)(struct hdac_device *dev, unsigned int event);
226 /* fields used by ext bus APIs */
227 int (*probe)(struct hdac_device *dev);
228 int (*remove)(struct hdac_device *dev);
229 void (*shutdown)(struct hdac_device *dev);
232 #define drv_to_hdac_driver(_drv) container_of(_drv, struct hdac_driver, driver)
234 const struct hda_device_id *
235 hdac_get_device_id(struct hdac_device *hdev, struct hdac_driver *drv);
240 struct hdac_bus_ops {
241 /* send a single command */
242 int (*command)(struct hdac_bus *bus, unsigned int cmd);
243 /* get a response from the last command */
244 int (*get_response)(struct hdac_bus *bus, unsigned int addr,
249 * ops used for ASoC HDA codec drivers
251 struct hdac_ext_bus_ops {
252 int (*hdev_attach)(struct hdac_device *hdev);
253 int (*hdev_detach)(struct hdac_device *hdev);
257 * Lowlevel I/O operators
260 /* mapped register accesses */
261 void (*reg_writel)(u32 value, u32 __iomem *addr);
262 u32 (*reg_readl)(u32 __iomem *addr);
263 void (*reg_writew)(u16 value, u16 __iomem *addr);
264 u16 (*reg_readw)(u16 __iomem *addr);
265 void (*reg_writeb)(u8 value, u8 __iomem *addr);
266 u8 (*reg_readb)(u8 __iomem *addr);
268 int (*dma_alloc_pages)(struct hdac_bus *bus, int type, size_t size,
269 struct snd_dma_buffer *buf);
270 void (*dma_free_pages)(struct hdac_bus *bus,
271 struct snd_dma_buffer *buf);
274 #define HDA_UNSOL_QUEUE_SIZE 64
275 #define HDA_MAX_CODECS 8 /* limit by controller side */
280 * Each CORB entry is 4byte, RIRB is 8byte
283 __le32 *buf; /* virtual address of CORB/RIRB buffer */
284 dma_addr_t addr; /* physical address of CORB/RIRB buffer */
285 unsigned short rp, wp; /* RIRB read/write pointers */
286 int cmds[HDA_MAX_CODECS]; /* number of pending requests */
287 u32 res[HDA_MAX_CODECS]; /* last read value */
291 * HD-audio bus base driver
293 * @ppcap: pp capabilities pointer
294 * @spbcap: SPIB capabilities pointer
295 * @mlcap: MultiLink capabilities pointer
296 * @gtscap: gts capabilities pointer
297 * @drsmcap: dma resume capabilities pointer
298 * @num_streams: streams supported
299 * @idx: HDA link index
300 * @hlink_list: link list of HDA links
301 * @lock: lock for link and display power mgmt
302 * @cmd_dma_state: state of cmd DMAs: CORB and RIRB
306 const struct hdac_bus_ops *ops;
307 const struct hdac_io_ops *io_ops;
308 const struct hdac_ext_bus_ops *ext_ops;
312 void __iomem *remap_addr;
316 void __iomem *spbcap;
318 void __iomem *gtscap;
319 void __iomem *drsmcap;
321 /* codec linked list */
322 struct list_head codec_list;
323 unsigned int num_codecs;
325 /* link caddr -> codec */
326 struct hdac_device *caddr_tbl[HDA_MAX_CODEC_ADDRESS + 1];
328 /* unsolicited event queue */
329 u32 unsol_queue[HDA_UNSOL_QUEUE_SIZE * 2]; /* ring buffer */
330 unsigned int unsol_rp, unsol_wp;
331 struct work_struct unsol_work;
333 /* bit flags of detected codecs */
334 unsigned long codec_mask;
336 /* bit flags of powered codecs */
337 unsigned long codec_powered;
342 unsigned int last_cmd[HDA_MAX_CODECS]; /* last sent command */
344 /* CORB/RIRB and position buffers */
345 struct snd_dma_buffer rb;
346 struct snd_dma_buffer posbuf;
348 /* hdac_stream linked list */
349 struct list_head stream_list;
351 /* operation state */
352 bool chip_init:1; /* h/w initialized */
355 bool sync_write:1; /* sync after verb write */
356 bool use_posbuf:1; /* use position buffer */
357 bool snoop:1; /* enable snooping */
358 bool align_bdle_4k:1; /* BDLE align 4K boundary */
359 bool reverse_assign:1; /* assign devices in reverse order */
360 bool corbrp_self_clear:1; /* CORBRP clears itself after reset */
362 int bdl_pos_adj; /* BDL position adjustment */
366 struct mutex cmd_mutex;
369 /* DRM component interface */
370 struct drm_audio_component *audio_component;
371 long display_power_status;
372 unsigned long display_power_active;
374 /* parameters required for enhanced capabilities */
378 /* link management */
379 struct list_head hlink_list;
383 int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
384 const struct hdac_bus_ops *ops,
385 const struct hdac_io_ops *io_ops);
386 void snd_hdac_bus_exit(struct hdac_bus *bus);
387 int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr,
388 unsigned int cmd, unsigned int *res);
389 int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,
390 unsigned int cmd, unsigned int *res);
391 void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex);
393 int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec);
394 void snd_hdac_bus_remove_device(struct hdac_bus *bus,
395 struct hdac_device *codec);
396 void snd_hdac_bus_process_unsol_events(struct work_struct *work);
398 static inline void snd_hdac_codec_link_up(struct hdac_device *codec)
400 set_bit(codec->addr, &codec->bus->codec_powered);
403 static inline void snd_hdac_codec_link_down(struct hdac_device *codec)
405 clear_bit(codec->addr, &codec->bus->codec_powered);
408 int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val);
409 int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
411 int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus);
413 bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset);
414 void snd_hdac_bus_stop_chip(struct hdac_bus *bus);
415 void snd_hdac_bus_init_cmd_io(struct hdac_bus *bus);
416 void snd_hdac_bus_stop_cmd_io(struct hdac_bus *bus);
417 void snd_hdac_bus_enter_link_reset(struct hdac_bus *bus);
418 void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus);
419 int snd_hdac_bus_reset_link(struct hdac_bus *bus, bool full_reset);
421 void snd_hdac_bus_update_rirb(struct hdac_bus *bus);
422 int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
423 void (*ack)(struct hdac_bus *,
424 struct hdac_stream *));
426 int snd_hdac_bus_alloc_stream_pages(struct hdac_bus *bus);
427 void snd_hdac_bus_free_stream_pages(struct hdac_bus *bus);
430 * macros for easy use
432 #define _snd_hdac_chip_writeb(chip, reg, value) \
433 ((chip)->io_ops->reg_writeb(value, (chip)->remap_addr + (reg)))
434 #define _snd_hdac_chip_readb(chip, reg) \
435 ((chip)->io_ops->reg_readb((chip)->remap_addr + (reg)))
436 #define _snd_hdac_chip_writew(chip, reg, value) \
437 ((chip)->io_ops->reg_writew(value, (chip)->remap_addr + (reg)))
438 #define _snd_hdac_chip_readw(chip, reg) \
439 ((chip)->io_ops->reg_readw((chip)->remap_addr + (reg)))
440 #define _snd_hdac_chip_writel(chip, reg, value) \
441 ((chip)->io_ops->reg_writel(value, (chip)->remap_addr + (reg)))
442 #define _snd_hdac_chip_readl(chip, reg) \
443 ((chip)->io_ops->reg_readl((chip)->remap_addr + (reg)))
445 /* read/write a register, pass without AZX_REG_ prefix */
446 #define snd_hdac_chip_writel(chip, reg, value) \
447 _snd_hdac_chip_writel(chip, AZX_REG_ ## reg, value)
448 #define snd_hdac_chip_writew(chip, reg, value) \
449 _snd_hdac_chip_writew(chip, AZX_REG_ ## reg, value)
450 #define snd_hdac_chip_writeb(chip, reg, value) \
451 _snd_hdac_chip_writeb(chip, AZX_REG_ ## reg, value)
452 #define snd_hdac_chip_readl(chip, reg) \
453 _snd_hdac_chip_readl(chip, AZX_REG_ ## reg)
454 #define snd_hdac_chip_readw(chip, reg) \
455 _snd_hdac_chip_readw(chip, AZX_REG_ ## reg)
456 #define snd_hdac_chip_readb(chip, reg) \
457 _snd_hdac_chip_readb(chip, AZX_REG_ ## reg)
459 /* update a register, pass without AZX_REG_ prefix */
460 #define snd_hdac_chip_updatel(chip, reg, mask, val) \
461 snd_hdac_chip_writel(chip, reg, \
462 (snd_hdac_chip_readl(chip, reg) & ~(mask)) | (val))
463 #define snd_hdac_chip_updatew(chip, reg, mask, val) \
464 snd_hdac_chip_writew(chip, reg, \
465 (snd_hdac_chip_readw(chip, reg) & ~(mask)) | (val))
466 #define snd_hdac_chip_updateb(chip, reg, mask, val) \
467 snd_hdac_chip_writeb(chip, reg, \
468 (snd_hdac_chip_readb(chip, reg) & ~(mask)) | (val))
474 struct hdac_bus *bus;
475 struct snd_dma_buffer bdl; /* BDL buffer */
476 __le32 *posbuf; /* position buffer pointer */
477 int direction; /* playback / capture (SNDRV_PCM_STREAM_*) */
479 unsigned int bufsize; /* size of the play buffer in bytes */
480 unsigned int period_bytes; /* size of the period in bytes */
481 unsigned int frags; /* number for period in the play buffer */
482 unsigned int fifo_size; /* FIFO size */
484 void __iomem *sd_addr; /* stream descriptor pointer */
486 u32 sd_int_sta_mask; /* stream int status mask */
489 struct snd_pcm_substream *substream; /* assigned substream,
492 unsigned int format_val; /* format value to be set in the
493 * controller and the codec
495 unsigned char stream_tag; /* assigned stream */
496 unsigned char index; /* stream index */
497 int assigned_key; /* last device# key assigned to */
502 bool no_period_wakeup:1;
506 unsigned long start_wallclk; /* start + minimum wallclk */
507 unsigned long period_wallclk; /* wallclk for period */
508 struct timecounter tc;
509 struct cyclecounter cc;
510 int delay_negative_threshold;
512 struct list_head list;
513 #ifdef CONFIG_SND_HDA_DSP_LOADER
514 /* DSP access mutex */
515 struct mutex dsp_mutex;
519 void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
520 int idx, int direction, int tag);
521 struct hdac_stream *snd_hdac_stream_assign(struct hdac_bus *bus,
522 struct snd_pcm_substream *substream);
523 void snd_hdac_stream_release(struct hdac_stream *azx_dev);
524 struct hdac_stream *snd_hdac_get_stream(struct hdac_bus *bus,
525 int dir, int stream_tag);
527 int snd_hdac_stream_setup(struct hdac_stream *azx_dev);
528 void snd_hdac_stream_cleanup(struct hdac_stream *azx_dev);
529 int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev);
530 int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
531 unsigned int format_val);
532 void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start);
533 void snd_hdac_stream_clear(struct hdac_stream *azx_dev);
534 void snd_hdac_stream_stop(struct hdac_stream *azx_dev);
535 void snd_hdac_stream_reset(struct hdac_stream *azx_dev);
536 void snd_hdac_stream_sync_trigger(struct hdac_stream *azx_dev, bool set,
537 unsigned int streams, unsigned int reg);
538 void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
539 unsigned int streams);
540 void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
541 unsigned int streams);
542 int snd_hdac_get_stream_stripe_ctl(struct hdac_bus *bus,
543 struct snd_pcm_substream *substream);
546 * macros for easy use
548 #define _snd_hdac_stream_write(type, dev, reg, value) \
549 ((dev)->bus->io_ops->reg_write ## type(value, (dev)->sd_addr + (reg)))
550 #define _snd_hdac_stream_read(type, dev, reg) \
551 ((dev)->bus->io_ops->reg_read ## type((dev)->sd_addr + (reg)))
553 /* read/write a register, pass without AZX_REG_ prefix */
554 #define snd_hdac_stream_writel(dev, reg, value) \
555 _snd_hdac_stream_write(l, dev, AZX_REG_ ## reg, value)
556 #define snd_hdac_stream_writew(dev, reg, value) \
557 _snd_hdac_stream_write(w, dev, AZX_REG_ ## reg, value)
558 #define snd_hdac_stream_writeb(dev, reg, value) \
559 _snd_hdac_stream_write(b, dev, AZX_REG_ ## reg, value)
560 #define snd_hdac_stream_readl(dev, reg) \
561 _snd_hdac_stream_read(l, dev, AZX_REG_ ## reg)
562 #define snd_hdac_stream_readw(dev, reg) \
563 _snd_hdac_stream_read(w, dev, AZX_REG_ ## reg)
564 #define snd_hdac_stream_readb(dev, reg) \
565 _snd_hdac_stream_read(b, dev, AZX_REG_ ## reg)
567 /* update a register, pass without AZX_REG_ prefix */
568 #define snd_hdac_stream_updatel(dev, reg, mask, val) \
569 snd_hdac_stream_writel(dev, reg, \
570 (snd_hdac_stream_readl(dev, reg) & \
572 #define snd_hdac_stream_updatew(dev, reg, mask, val) \
573 snd_hdac_stream_writew(dev, reg, \
574 (snd_hdac_stream_readw(dev, reg) & \
576 #define snd_hdac_stream_updateb(dev, reg, mask, val) \
577 snd_hdac_stream_writeb(dev, reg, \
578 (snd_hdac_stream_readb(dev, reg) & \
581 #ifdef CONFIG_SND_HDA_DSP_LOADER
582 /* DSP lock helpers */
583 #define snd_hdac_dsp_lock_init(dev) mutex_init(&(dev)->dsp_mutex)
584 #define snd_hdac_dsp_lock(dev) mutex_lock(&(dev)->dsp_mutex)
585 #define snd_hdac_dsp_unlock(dev) mutex_unlock(&(dev)->dsp_mutex)
586 #define snd_hdac_stream_is_locked(dev) ((dev)->locked)
587 /* DSP loader helpers */
588 int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
589 unsigned int byte_size, struct snd_dma_buffer *bufp);
590 void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start);
591 void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
592 struct snd_dma_buffer *dmab);
593 #else /* CONFIG_SND_HDA_DSP_LOADER */
594 #define snd_hdac_dsp_lock_init(dev) do {} while (0)
595 #define snd_hdac_dsp_lock(dev) do {} while (0)
596 #define snd_hdac_dsp_unlock(dev) do {} while (0)
597 #define snd_hdac_stream_is_locked(dev) 0
600 snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
601 unsigned int byte_size, struct snd_dma_buffer *bufp)
606 static inline void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
610 static inline void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
611 struct snd_dma_buffer *dmab)
614 #endif /* CONFIG_SND_HDA_DSP_LOADER */
618 * generic array helpers
620 void *snd_array_new(struct snd_array *array);
621 void snd_array_free(struct snd_array *array);
622 static inline void snd_array_init(struct snd_array *array, unsigned int size,
625 array->elem_size = size;
626 array->alloc_align = align;
629 static inline void *snd_array_elem(struct snd_array *array, unsigned int idx)
631 return array->list + idx * array->elem_size;
634 static inline unsigned int snd_array_index(struct snd_array *array, void *ptr)
636 return (unsigned long)(ptr - array->list) / array->elem_size;
639 /* a helper macro to iterate for each snd_array element */
640 #define snd_array_for_each(array, idx, ptr) \
641 for ((idx) = 0, (ptr) = (array)->list; (idx) < (array)->used; \
642 (ptr) = snd_array_elem(array, ++(idx)))
644 #endif /* __SOUND_HDAUDIO_H */