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>
12 #include <linux/io-64-nonatomic-lo-hi.h>
13 #include <linux/pm_runtime.h>
14 #include <linux/timecounter.h>
15 #include <sound/core.h>
16 #include <sound/pcm.h>
17 #include <sound/memalloc.h>
18 #include <sound/hda_verbs.h>
19 #include <drm/i915_component.h>
22 typedef u16 hda_nid_t;
28 struct hdac_widget_tree;
34 extern struct bus_type snd_hda_bus_type;
42 unsigned int elem_size;
43 unsigned int alloc_align;
48 * HD-audio codec base device
54 unsigned int addr; /* codec address */
55 struct list_head list; /* list point for bus codec_list */
57 hda_nid_t afg; /* AFG node id */
58 hda_nid_t mfg; /* MFG node id */
61 unsigned int vendor_id;
62 unsigned int subsystem_id;
63 unsigned int revision_id;
64 unsigned int afg_function_id;
65 unsigned int mfg_function_id;
66 unsigned int afg_unsol:1;
67 unsigned int mfg_unsol:1;
69 unsigned int power_caps; /* FG power caps */
71 const char *vendor_name; /* codec vendor name */
72 const char *chip_name; /* codec chip name */
74 /* verb exec op override */
75 int (*exec_verb)(struct hdac_device *dev, unsigned int cmd,
76 unsigned int flags, unsigned int *res);
79 unsigned int num_nodes;
80 hda_nid_t start_nid, end_nid;
83 atomic_t in_pm; /* suspend/resume being performed */
86 struct mutex widget_lock;
87 struct hdac_widget_tree *widgets;
90 struct regmap *regmap;
91 struct mutex regmap_lock;
92 struct snd_array vendor_verbs;
93 bool lazy_cache:1; /* don't wake up for writes */
94 bool caps_overwriting:1; /* caps overwrite being in process */
95 bool cache_coef:1; /* cache COEF read/write too */
96 unsigned int registered:1; /* codec was registered */
99 /* device/driver type used for matching */
107 SND_SKL_PCI_BIND_AUTO, /* automatic selection based on pci class */
108 SND_SKL_PCI_BIND_LEGACY,/* bind only with legacy driver */
109 SND_SKL_PCI_BIND_ASOC /* bind only with ASoC driver */
114 HDA_INPUT, HDA_OUTPUT
117 #define dev_to_hdac_dev(_dev) container_of(_dev, struct hdac_device, dev)
119 int snd_hdac_device_init(struct hdac_device *dev, struct hdac_bus *bus,
120 const char *name, unsigned int addr);
121 void snd_hdac_device_exit(struct hdac_device *dev);
122 int snd_hdac_device_register(struct hdac_device *codec);
123 void snd_hdac_device_unregister(struct hdac_device *codec);
124 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name);
125 int snd_hdac_codec_modalias(struct hdac_device *hdac, char *buf, size_t size);
127 int snd_hdac_refresh_widgets(struct hdac_device *codec);
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 false; }
213 static inline bool snd_hdac_is_power_on(struct hdac_device *codec) { return true; }
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,
246 /* notify of codec link power-up/down */
247 void (*link_power)(struct hdac_device *hdev, bool enable);
251 * ops used for ASoC HDA codec drivers
253 struct hdac_ext_bus_ops {
254 int (*hdev_attach)(struct hdac_device *hdev);
255 int (*hdev_detach)(struct hdac_device *hdev);
258 #define HDA_UNSOL_QUEUE_SIZE 64
259 #define HDA_MAX_CODECS 8 /* limit by controller side */
264 * Each CORB entry is 4byte, RIRB is 8byte
267 __le32 *buf; /* virtual address of CORB/RIRB buffer */
268 dma_addr_t addr; /* physical address of CORB/RIRB buffer */
269 unsigned short rp, wp; /* RIRB read/write pointers */
270 int cmds[HDA_MAX_CODECS]; /* number of pending requests */
271 u32 res[HDA_MAX_CODECS]; /* last read value */
275 * HD-audio bus base driver
277 * @ppcap: pp capabilities pointer
278 * @spbcap: SPIB capabilities pointer
279 * @mlcap: MultiLink capabilities pointer
280 * @gtscap: gts capabilities pointer
281 * @drsmcap: dma resume capabilities pointer
282 * @num_streams: streams supported
283 * @idx: HDA link index
284 * @hlink_list: link list of HDA links
285 * @lock: lock for link and display power mgmt
286 * @cmd_dma_state: state of cmd DMAs: CORB and RIRB
290 const struct hdac_bus_ops *ops;
291 const struct hdac_ext_bus_ops *ext_ops;
295 void __iomem *remap_addr;
299 void __iomem *spbcap;
301 void __iomem *gtscap;
302 void __iomem *drsmcap;
304 /* codec linked list */
305 struct list_head codec_list;
306 unsigned int num_codecs;
308 /* link caddr -> codec */
309 struct hdac_device *caddr_tbl[HDA_MAX_CODEC_ADDRESS + 1];
311 /* unsolicited event queue */
312 u32 unsol_queue[HDA_UNSOL_QUEUE_SIZE * 2]; /* ring buffer */
313 unsigned int unsol_rp, unsol_wp;
314 struct work_struct unsol_work;
316 /* bit flags of detected codecs */
317 unsigned long codec_mask;
319 /* bit flags of powered codecs */
320 unsigned long codec_powered;
325 unsigned int last_cmd[HDA_MAX_CODECS]; /* last sent command */
326 wait_queue_head_t rirb_wq;
328 /* CORB/RIRB and position buffers */
329 struct snd_dma_buffer rb;
330 struct snd_dma_buffer posbuf;
331 int dma_type; /* SNDRV_DMA_TYPE_XXX for CORB/RIRB */
333 /* hdac_stream linked list */
334 struct list_head stream_list;
336 /* operation state */
337 bool chip_init:1; /* h/w initialized */
340 bool aligned_mmio:1; /* aligned MMIO access */
341 bool sync_write:1; /* sync after verb write */
342 bool use_posbuf:1; /* use position buffer */
343 bool snoop:1; /* enable snooping */
344 bool align_bdle_4k:1; /* BDLE align 4K boundary */
345 bool reverse_assign:1; /* assign devices in reverse order */
346 bool corbrp_self_clear:1; /* CORBRP clears itself after reset */
348 bool needs_damn_long_delay:1;
352 int bdl_pos_adj; /* BDL position adjustment */
354 /* delay time in us for dma stop */
355 unsigned int dma_stop_delay;
359 struct mutex cmd_mutex;
362 /* DRM component interface */
363 struct drm_audio_component *audio_component;
364 long display_power_status;
365 unsigned long display_power_active;
367 /* parameters required for enhanced capabilities */
371 /* link management */
372 struct list_head hlink_list;
375 /* factor used to derive STRIPE control value */
376 unsigned int sdo_limit;
379 int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
380 const struct hdac_bus_ops *ops);
381 void snd_hdac_bus_exit(struct hdac_bus *bus);
382 int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,
383 unsigned int cmd, unsigned int *res);
385 void snd_hdac_codec_link_up(struct hdac_device *codec);
386 void snd_hdac_codec_link_down(struct hdac_device *codec);
388 int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val);
389 int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
391 int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus);
393 bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset);
394 void snd_hdac_bus_stop_chip(struct hdac_bus *bus);
395 void snd_hdac_bus_init_cmd_io(struct hdac_bus *bus);
396 void snd_hdac_bus_stop_cmd_io(struct hdac_bus *bus);
397 void snd_hdac_bus_enter_link_reset(struct hdac_bus *bus);
398 void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus);
399 int snd_hdac_bus_reset_link(struct hdac_bus *bus, bool full_reset);
400 void snd_hdac_bus_link_power(struct hdac_device *hdev, bool enable);
402 void snd_hdac_bus_update_rirb(struct hdac_bus *bus);
403 int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
404 void (*ack)(struct hdac_bus *,
405 struct hdac_stream *));
407 int snd_hdac_bus_alloc_stream_pages(struct hdac_bus *bus);
408 void snd_hdac_bus_free_stream_pages(struct hdac_bus *bus);
410 #ifdef CONFIG_SND_HDA_ALIGNED_MMIO
411 unsigned int snd_hdac_aligned_read(void __iomem *addr, unsigned int mask);
412 void snd_hdac_aligned_write(unsigned int val, void __iomem *addr,
414 #define snd_hdac_aligned_mmio(bus) (bus)->aligned_mmio
416 #define snd_hdac_aligned_mmio(bus) false
417 #define snd_hdac_aligned_read(addr, mask) 0
418 #define snd_hdac_aligned_write(val, addr, mask) do {} while (0)
421 static inline void snd_hdac_reg_writeb(struct hdac_bus *bus, void __iomem *addr,
424 if (snd_hdac_aligned_mmio(bus))
425 snd_hdac_aligned_write(val, addr, 0xff);
430 static inline void snd_hdac_reg_writew(struct hdac_bus *bus, void __iomem *addr,
433 if (snd_hdac_aligned_mmio(bus))
434 snd_hdac_aligned_write(val, addr, 0xffff);
439 static inline u8 snd_hdac_reg_readb(struct hdac_bus *bus, void __iomem *addr)
441 return snd_hdac_aligned_mmio(bus) ?
442 snd_hdac_aligned_read(addr, 0xff) : readb(addr);
445 static inline u16 snd_hdac_reg_readw(struct hdac_bus *bus, void __iomem *addr)
447 return snd_hdac_aligned_mmio(bus) ?
448 snd_hdac_aligned_read(addr, 0xffff) : readw(addr);
451 #define snd_hdac_reg_writel(bus, addr, val) writel(val, addr)
452 #define snd_hdac_reg_readl(bus, addr) readl(addr)
453 #define snd_hdac_reg_writeq(bus, addr, val) writeq(val, addr)
454 #define snd_hdac_reg_readq(bus, addr) readq(addr)
457 * macros for easy use
459 #define _snd_hdac_chip_writeb(chip, reg, value) \
460 snd_hdac_reg_writeb(chip, (chip)->remap_addr + (reg), value)
461 #define _snd_hdac_chip_readb(chip, reg) \
462 snd_hdac_reg_readb(chip, (chip)->remap_addr + (reg))
463 #define _snd_hdac_chip_writew(chip, reg, value) \
464 snd_hdac_reg_writew(chip, (chip)->remap_addr + (reg), value)
465 #define _snd_hdac_chip_readw(chip, reg) \
466 snd_hdac_reg_readw(chip, (chip)->remap_addr + (reg))
467 #define _snd_hdac_chip_writel(chip, reg, value) \
468 snd_hdac_reg_writel(chip, (chip)->remap_addr + (reg), value)
469 #define _snd_hdac_chip_readl(chip, reg) \
470 snd_hdac_reg_readl(chip, (chip)->remap_addr + (reg))
472 /* read/write a register, pass without AZX_REG_ prefix */
473 #define snd_hdac_chip_writel(chip, reg, value) \
474 _snd_hdac_chip_writel(chip, AZX_REG_ ## reg, value)
475 #define snd_hdac_chip_writew(chip, reg, value) \
476 _snd_hdac_chip_writew(chip, AZX_REG_ ## reg, value)
477 #define snd_hdac_chip_writeb(chip, reg, value) \
478 _snd_hdac_chip_writeb(chip, AZX_REG_ ## reg, value)
479 #define snd_hdac_chip_readl(chip, reg) \
480 _snd_hdac_chip_readl(chip, AZX_REG_ ## reg)
481 #define snd_hdac_chip_readw(chip, reg) \
482 _snd_hdac_chip_readw(chip, AZX_REG_ ## reg)
483 #define snd_hdac_chip_readb(chip, reg) \
484 _snd_hdac_chip_readb(chip, AZX_REG_ ## reg)
486 /* update a register, pass without AZX_REG_ prefix */
487 #define snd_hdac_chip_updatel(chip, reg, mask, val) \
488 snd_hdac_chip_writel(chip, reg, \
489 (snd_hdac_chip_readl(chip, reg) & ~(mask)) | (val))
490 #define snd_hdac_chip_updatew(chip, reg, mask, val) \
491 snd_hdac_chip_writew(chip, reg, \
492 (snd_hdac_chip_readw(chip, reg) & ~(mask)) | (val))
493 #define snd_hdac_chip_updateb(chip, reg, mask, val) \
494 snd_hdac_chip_writeb(chip, reg, \
495 (snd_hdac_chip_readb(chip, reg) & ~(mask)) | (val))
501 struct hdac_bus *bus;
502 struct snd_dma_buffer bdl; /* BDL buffer */
503 __le32 *posbuf; /* position buffer pointer */
504 int direction; /* playback / capture (SNDRV_PCM_STREAM_*) */
506 unsigned int bufsize; /* size of the play buffer in bytes */
507 unsigned int period_bytes; /* size of the period in bytes */
508 unsigned int frags; /* number for period in the play buffer */
509 unsigned int fifo_size; /* FIFO size */
511 void __iomem *sd_addr; /* stream descriptor pointer */
513 u32 sd_int_sta_mask; /* stream int status mask */
516 struct snd_pcm_substream *substream; /* assigned substream,
519 struct snd_compr_stream *cstream;
520 unsigned int format_val; /* format value to be set in the
521 * controller and the codec
523 unsigned char stream_tag; /* assigned stream */
524 unsigned char index; /* stream index */
525 int assigned_key; /* last device# key assigned to */
530 bool no_period_wakeup:1;
532 bool stripe:1; /* apply stripe control */
536 unsigned long start_wallclk; /* start + minimum wallclk */
537 unsigned long period_wallclk; /* wallclk for period */
538 struct timecounter tc;
539 struct cyclecounter cc;
540 int delay_negative_threshold;
542 struct list_head list;
543 #ifdef CONFIG_SND_HDA_DSP_LOADER
544 /* DSP access mutex */
545 struct mutex dsp_mutex;
549 void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
550 int idx, int direction, int tag);
551 struct hdac_stream *snd_hdac_stream_assign(struct hdac_bus *bus,
552 struct snd_pcm_substream *substream);
553 void snd_hdac_stream_release(struct hdac_stream *azx_dev);
554 struct hdac_stream *snd_hdac_get_stream(struct hdac_bus *bus,
555 int dir, int stream_tag);
557 int snd_hdac_stream_setup(struct hdac_stream *azx_dev);
558 void snd_hdac_stream_cleanup(struct hdac_stream *azx_dev);
559 int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev);
560 int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
561 unsigned int format_val);
562 void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start);
563 void snd_hdac_stream_clear(struct hdac_stream *azx_dev);
564 void snd_hdac_stream_stop(struct hdac_stream *azx_dev);
565 void snd_hdac_stop_streams_and_chip(struct hdac_bus *bus);
566 void snd_hdac_stream_reset(struct hdac_stream *azx_dev);
567 void snd_hdac_stream_sync_trigger(struct hdac_stream *azx_dev, bool set,
568 unsigned int streams, unsigned int reg);
569 void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
570 unsigned int streams);
571 void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
572 unsigned int streams);
573 int snd_hdac_get_stream_stripe_ctl(struct hdac_bus *bus,
574 struct snd_pcm_substream *substream);
577 * macros for easy use
579 /* read/write a register, pass without AZX_REG_ prefix */
580 #define snd_hdac_stream_writel(dev, reg, value) \
581 snd_hdac_reg_writel((dev)->bus, (dev)->sd_addr + AZX_REG_ ## reg, value)
582 #define snd_hdac_stream_writew(dev, reg, value) \
583 snd_hdac_reg_writew((dev)->bus, (dev)->sd_addr + AZX_REG_ ## reg, value)
584 #define snd_hdac_stream_writeb(dev, reg, value) \
585 snd_hdac_reg_writeb((dev)->bus, (dev)->sd_addr + AZX_REG_ ## reg, value)
586 #define snd_hdac_stream_readl(dev, reg) \
587 snd_hdac_reg_readl((dev)->bus, (dev)->sd_addr + AZX_REG_ ## reg)
588 #define snd_hdac_stream_readw(dev, reg) \
589 snd_hdac_reg_readw((dev)->bus, (dev)->sd_addr + AZX_REG_ ## reg)
590 #define snd_hdac_stream_readb(dev, reg) \
591 snd_hdac_reg_readb((dev)->bus, (dev)->sd_addr + AZX_REG_ ## reg)
593 /* update a register, pass without AZX_REG_ prefix */
594 #define snd_hdac_stream_updatel(dev, reg, mask, val) \
595 snd_hdac_stream_writel(dev, reg, \
596 (snd_hdac_stream_readl(dev, reg) & \
598 #define snd_hdac_stream_updatew(dev, reg, mask, val) \
599 snd_hdac_stream_writew(dev, reg, \
600 (snd_hdac_stream_readw(dev, reg) & \
602 #define snd_hdac_stream_updateb(dev, reg, mask, val) \
603 snd_hdac_stream_writeb(dev, reg, \
604 (snd_hdac_stream_readb(dev, reg) & \
607 #ifdef CONFIG_SND_HDA_DSP_LOADER
608 /* DSP lock helpers */
609 #define snd_hdac_dsp_lock_init(dev) mutex_init(&(dev)->dsp_mutex)
610 #define snd_hdac_dsp_lock(dev) mutex_lock(&(dev)->dsp_mutex)
611 #define snd_hdac_dsp_unlock(dev) mutex_unlock(&(dev)->dsp_mutex)
612 #define snd_hdac_stream_is_locked(dev) ((dev)->locked)
613 /* DSP loader helpers */
614 int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
615 unsigned int byte_size, struct snd_dma_buffer *bufp);
616 void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start);
617 void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
618 struct snd_dma_buffer *dmab);
619 #else /* CONFIG_SND_HDA_DSP_LOADER */
620 #define snd_hdac_dsp_lock_init(dev) do {} while (0)
621 #define snd_hdac_dsp_lock(dev) do {} while (0)
622 #define snd_hdac_dsp_unlock(dev) do {} while (0)
623 #define snd_hdac_stream_is_locked(dev) 0
626 snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
627 unsigned int byte_size, struct snd_dma_buffer *bufp)
632 static inline void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
636 static inline void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
637 struct snd_dma_buffer *dmab)
640 #endif /* CONFIG_SND_HDA_DSP_LOADER */
644 * generic array helpers
646 void *snd_array_new(struct snd_array *array);
647 void snd_array_free(struct snd_array *array);
648 static inline void snd_array_init(struct snd_array *array, unsigned int size,
651 array->elem_size = size;
652 array->alloc_align = align;
655 static inline void *snd_array_elem(struct snd_array *array, unsigned int idx)
657 return array->list + idx * array->elem_size;
660 static inline unsigned int snd_array_index(struct snd_array *array, void *ptr)
662 return (unsigned long)(ptr - array->list) / array->elem_size;
665 /* a helper macro to iterate for each snd_array element */
666 #define snd_array_for_each(array, idx, ptr) \
667 for ((idx) = 0, (ptr) = (array)->list; (idx) < (array)->used; \
668 (ptr) = snd_array_elem(array, ++(idx)))
670 #endif /* __SOUND_HDAUDIO_H */