638 lines
20 KiB
C
638 lines
20 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* HD-audio core stuff
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*/
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#ifndef __SOUND_HDAUDIO_H
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#define __SOUND_HDAUDIO_H
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#include <linux/device.h>
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#include <linux/interrupt.h>
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#include <linux/pm_runtime.h>
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#include <linux/timecounter.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/memalloc.h>
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#include <sound/hda_verbs.h>
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#include <drm/i915_component.h>
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/* codec node id */
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typedef u16 hda_nid_t;
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struct hdac_bus;
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struct hdac_stream;
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struct hdac_device;
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struct hdac_driver;
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struct hdac_widget_tree;
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struct hda_device_id;
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/*
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* exported bus type
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*/
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extern struct bus_type snd_hda_bus_type;
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/*
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* generic arrays
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*/
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struct snd_array {
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unsigned int used;
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unsigned int alloced;
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unsigned int elem_size;
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unsigned int alloc_align;
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void *list;
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};
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/*
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* HD-audio codec base device
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*/
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struct hdac_device {
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struct device dev;
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int type;
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struct hdac_bus *bus;
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unsigned int addr; /* codec address */
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struct list_head list; /* list point for bus codec_list */
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hda_nid_t afg; /* AFG node id */
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hda_nid_t mfg; /* MFG node id */
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/* ids */
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unsigned int vendor_id;
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unsigned int subsystem_id;
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unsigned int revision_id;
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unsigned int afg_function_id;
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unsigned int mfg_function_id;
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unsigned int afg_unsol:1;
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unsigned int mfg_unsol:1;
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unsigned int power_caps; /* FG power caps */
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const char *vendor_name; /* codec vendor name */
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const char *chip_name; /* codec chip name */
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/* verb exec op override */
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int (*exec_verb)(struct hdac_device *dev, unsigned int cmd,
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unsigned int flags, unsigned int *res);
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/* widgets */
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unsigned int num_nodes;
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hda_nid_t start_nid, end_nid;
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/* misc flags */
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atomic_t in_pm; /* suspend/resume being performed */
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bool link_power_control:1;
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/* sysfs */
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struct hdac_widget_tree *widgets;
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/* regmap */
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struct regmap *regmap;
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struct snd_array vendor_verbs;
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bool lazy_cache:1; /* don't wake up for writes */
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bool caps_overwriting:1; /* caps overwrite being in process */
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bool cache_coef:1; /* cache COEF read/write too */
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};
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/* device/driver type used for matching */
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enum {
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HDA_DEV_CORE,
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HDA_DEV_LEGACY,
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HDA_DEV_ASOC,
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};
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/* direction */
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enum {
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HDA_INPUT, HDA_OUTPUT
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};
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#define dev_to_hdac_dev(_dev) container_of(_dev, struct hdac_device, dev)
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int snd_hdac_device_init(struct hdac_device *dev, struct hdac_bus *bus,
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const char *name, unsigned int addr);
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void snd_hdac_device_exit(struct hdac_device *dev);
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int snd_hdac_device_register(struct hdac_device *codec);
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void snd_hdac_device_unregister(struct hdac_device *codec);
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int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name);
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int snd_hdac_codec_modalias(struct hdac_device *hdac, char *buf, size_t size);
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int snd_hdac_refresh_widgets(struct hdac_device *codec, bool sysfs);
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unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
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unsigned int verb, unsigned int parm);
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int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
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unsigned int flags, unsigned int *res);
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int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
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unsigned int verb, unsigned int parm, unsigned int *res);
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int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
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unsigned int *res);
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int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
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int parm);
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int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
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unsigned int parm, unsigned int val);
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int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
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hda_nid_t *conn_list, int max_conns);
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int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
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hda_nid_t *start_id);
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unsigned int snd_hdac_calc_stream_format(unsigned int rate,
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unsigned int channels,
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snd_pcm_format_t format,
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unsigned int maxbps,
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unsigned short spdif_ctls);
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int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
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u32 *ratesp, u64 *formatsp, unsigned int *bpsp);
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bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
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unsigned int format);
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int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
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int flags, unsigned int verb, unsigned int parm);
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int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
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int flags, unsigned int verb, unsigned int parm);
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bool snd_hdac_check_power_state(struct hdac_device *hdac,
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hda_nid_t nid, unsigned int target_state);
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unsigned int snd_hdac_sync_power_state(struct hdac_device *hdac,
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hda_nid_t nid, unsigned int target_state);
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/**
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* snd_hdac_read_parm - read a codec parameter
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* @codec: the codec object
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* @nid: NID to read a parameter
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* @parm: parameter to read
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*
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* Returns -1 for error. If you need to distinguish the error more
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* strictly, use _snd_hdac_read_parm() directly.
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*/
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static inline int snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid,
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int parm)
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{
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unsigned int val;
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return _snd_hdac_read_parm(codec, nid, parm, &val) < 0 ? -1 : val;
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}
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#ifdef CONFIG_PM
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int snd_hdac_power_up(struct hdac_device *codec);
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int snd_hdac_power_down(struct hdac_device *codec);
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int snd_hdac_power_up_pm(struct hdac_device *codec);
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int snd_hdac_power_down_pm(struct hdac_device *codec);
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int snd_hdac_keep_power_up(struct hdac_device *codec);
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/* call this at entering into suspend/resume callbacks in codec driver */
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static inline void snd_hdac_enter_pm(struct hdac_device *codec)
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{
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atomic_inc(&codec->in_pm);
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}
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/* call this at leaving from suspend/resume callbacks in codec driver */
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static inline void snd_hdac_leave_pm(struct hdac_device *codec)
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{
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atomic_dec(&codec->in_pm);
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}
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static inline bool snd_hdac_is_in_pm(struct hdac_device *codec)
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{
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return atomic_read(&codec->in_pm);
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}
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static inline bool snd_hdac_is_power_on(struct hdac_device *codec)
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{
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return !pm_runtime_suspended(&codec->dev);
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}
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#else
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static inline int snd_hdac_power_up(struct hdac_device *codec) { return 0; }
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static inline int snd_hdac_power_down(struct hdac_device *codec) { return 0; }
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static inline int snd_hdac_power_up_pm(struct hdac_device *codec) { return 0; }
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static inline int snd_hdac_power_down_pm(struct hdac_device *codec) { return 0; }
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static inline int snd_hdac_keep_power_up(struct hdac_device *codec) { return 0; }
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static inline void snd_hdac_enter_pm(struct hdac_device *codec) {}
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static inline void snd_hdac_leave_pm(struct hdac_device *codec) {}
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static inline bool snd_hdac_is_in_pm(struct hdac_device *codec) { return 0; }
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static inline bool snd_hdac_is_power_on(struct hdac_device *codec) { return 1; }
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#endif
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/*
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* HD-audio codec base driver
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*/
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struct hdac_driver {
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struct device_driver driver;
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int type;
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const struct hda_device_id *id_table;
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int (*match)(struct hdac_device *dev, struct hdac_driver *drv);
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void (*unsol_event)(struct hdac_device *dev, unsigned int event);
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/* fields used by ext bus APIs */
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int (*probe)(struct hdac_device *dev);
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int (*remove)(struct hdac_device *dev);
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void (*shutdown)(struct hdac_device *dev);
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};
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#define drv_to_hdac_driver(_drv) container_of(_drv, struct hdac_driver, driver)
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const struct hda_device_id *
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hdac_get_device_id(struct hdac_device *hdev, struct hdac_driver *drv);
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/*
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* Bus verb operators
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*/
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struct hdac_bus_ops {
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/* send a single command */
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int (*command)(struct hdac_bus *bus, unsigned int cmd);
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/* get a response from the last command */
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int (*get_response)(struct hdac_bus *bus, unsigned int addr,
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unsigned int *res);
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/* control the link power */
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int (*link_power)(struct hdac_bus *bus, bool enable);
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};
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/*
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* ops used for ASoC HDA codec drivers
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*/
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struct hdac_ext_bus_ops {
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int (*hdev_attach)(struct hdac_device *hdev);
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int (*hdev_detach)(struct hdac_device *hdev);
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};
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/*
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* Lowlevel I/O operators
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*/
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struct hdac_io_ops {
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/* mapped register accesses */
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void (*reg_writel)(u32 value, u32 __iomem *addr);
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u32 (*reg_readl)(u32 __iomem *addr);
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void (*reg_writew)(u16 value, u16 __iomem *addr);
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u16 (*reg_readw)(u16 __iomem *addr);
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void (*reg_writeb)(u8 value, u8 __iomem *addr);
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u8 (*reg_readb)(u8 __iomem *addr);
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/* Allocation ops */
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int (*dma_alloc_pages)(struct hdac_bus *bus, int type, size_t size,
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struct snd_dma_buffer *buf);
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void (*dma_free_pages)(struct hdac_bus *bus,
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struct snd_dma_buffer *buf);
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};
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#define HDA_UNSOL_QUEUE_SIZE 64
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#define HDA_MAX_CODECS 8 /* limit by controller side */
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/*
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* CORB/RIRB
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*
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* Each CORB entry is 4byte, RIRB is 8byte
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*/
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struct hdac_rb {
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__le32 *buf; /* virtual address of CORB/RIRB buffer */
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dma_addr_t addr; /* physical address of CORB/RIRB buffer */
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unsigned short rp, wp; /* RIRB read/write pointers */
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int cmds[HDA_MAX_CODECS]; /* number of pending requests */
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u32 res[HDA_MAX_CODECS]; /* last read value */
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};
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/*
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* HD-audio bus base driver
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*
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* @ppcap: pp capabilities pointer
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* @spbcap: SPIB capabilities pointer
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* @mlcap: MultiLink capabilities pointer
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* @gtscap: gts capabilities pointer
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* @drsmcap: dma resume capabilities pointer
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* @num_streams: streams supported
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* @idx: HDA link index
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* @hlink_list: link list of HDA links
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* @lock: lock for link mgmt
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* @cmd_dma_state: state of cmd DMAs: CORB and RIRB
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*/
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struct hdac_bus {
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struct device *dev;
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const struct hdac_bus_ops *ops;
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const struct hdac_io_ops *io_ops;
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const struct hdac_ext_bus_ops *ext_ops;
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/* h/w resources */
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unsigned long addr;
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void __iomem *remap_addr;
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int irq;
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void __iomem *ppcap;
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void __iomem *spbcap;
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void __iomem *mlcap;
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void __iomem *gtscap;
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void __iomem *drsmcap;
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/* codec linked list */
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struct list_head codec_list;
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unsigned int num_codecs;
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/* link caddr -> codec */
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struct hdac_device *caddr_tbl[HDA_MAX_CODEC_ADDRESS + 1];
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/* unsolicited event queue */
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u32 unsol_queue[HDA_UNSOL_QUEUE_SIZE * 2]; /* ring buffer */
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unsigned int unsol_rp, unsol_wp;
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struct work_struct unsol_work;
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/* bit flags of detected codecs */
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unsigned long codec_mask;
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/* bit flags of powered codecs */
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unsigned long codec_powered;
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/* CORB/RIRB */
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struct hdac_rb corb;
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struct hdac_rb rirb;
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unsigned int last_cmd[HDA_MAX_CODECS]; /* last sent command */
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/* CORB/RIRB and position buffers */
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struct snd_dma_buffer rb;
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struct snd_dma_buffer posbuf;
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/* hdac_stream linked list */
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struct list_head stream_list;
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/* operation state */
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bool chip_init:1; /* h/w initialized */
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/* behavior flags */
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bool sync_write:1; /* sync after verb write */
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bool use_posbuf:1; /* use position buffer */
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bool snoop:1; /* enable snooping */
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bool align_bdle_4k:1; /* BDLE align 4K boundary */
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bool reverse_assign:1; /* assign devices in reverse order */
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bool corbrp_self_clear:1; /* CORBRP clears itself after reset */
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int bdl_pos_adj; /* BDL position adjustment */
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/* locks */
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spinlock_t reg_lock;
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struct mutex cmd_mutex;
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/* DRM component interface */
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struct drm_audio_component *audio_component;
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int drm_power_refcount;
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/* parameters required for enhanced capabilities */
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int num_streams;
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int idx;
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struct list_head hlink_list;
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struct mutex lock;
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bool cmd_dma_state;
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};
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int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
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const struct hdac_bus_ops *ops,
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const struct hdac_io_ops *io_ops);
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void snd_hdac_bus_exit(struct hdac_bus *bus);
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int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr,
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unsigned int cmd, unsigned int *res);
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int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,
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unsigned int cmd, unsigned int *res);
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void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex);
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int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec);
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void snd_hdac_bus_remove_device(struct hdac_bus *bus,
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struct hdac_device *codec);
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static inline void snd_hdac_codec_link_up(struct hdac_device *codec)
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{
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set_bit(codec->addr, &codec->bus->codec_powered);
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}
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static inline void snd_hdac_codec_link_down(struct hdac_device *codec)
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{
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clear_bit(codec->addr, &codec->bus->codec_powered);
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}
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int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val);
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int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
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unsigned int *res);
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int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus);
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int snd_hdac_link_power(struct hdac_device *codec, bool enable);
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bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset);
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void snd_hdac_bus_stop_chip(struct hdac_bus *bus);
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void snd_hdac_bus_init_cmd_io(struct hdac_bus *bus);
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void snd_hdac_bus_stop_cmd_io(struct hdac_bus *bus);
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void snd_hdac_bus_enter_link_reset(struct hdac_bus *bus);
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void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus);
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int snd_hdac_bus_reset_link(struct hdac_bus *bus, bool full_reset);
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void snd_hdac_bus_update_rirb(struct hdac_bus *bus);
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int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
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void (*ack)(struct hdac_bus *,
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struct hdac_stream *));
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int snd_hdac_bus_alloc_stream_pages(struct hdac_bus *bus);
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void snd_hdac_bus_free_stream_pages(struct hdac_bus *bus);
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/*
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* macros for easy use
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*/
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#define _snd_hdac_chip_writeb(chip, reg, value) \
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((chip)->io_ops->reg_writeb(value, (chip)->remap_addr + (reg)))
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#define _snd_hdac_chip_readb(chip, reg) \
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((chip)->io_ops->reg_readb((chip)->remap_addr + (reg)))
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#define _snd_hdac_chip_writew(chip, reg, value) \
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((chip)->io_ops->reg_writew(value, (chip)->remap_addr + (reg)))
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#define _snd_hdac_chip_readw(chip, reg) \
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((chip)->io_ops->reg_readw((chip)->remap_addr + (reg)))
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#define _snd_hdac_chip_writel(chip, reg, value) \
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((chip)->io_ops->reg_writel(value, (chip)->remap_addr + (reg)))
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#define _snd_hdac_chip_readl(chip, reg) \
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((chip)->io_ops->reg_readl((chip)->remap_addr + (reg)))
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/* read/write a register, pass without AZX_REG_ prefix */
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#define snd_hdac_chip_writel(chip, reg, value) \
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_snd_hdac_chip_writel(chip, AZX_REG_ ## reg, value)
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#define snd_hdac_chip_writew(chip, reg, value) \
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_snd_hdac_chip_writew(chip, AZX_REG_ ## reg, value)
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#define snd_hdac_chip_writeb(chip, reg, value) \
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_snd_hdac_chip_writeb(chip, AZX_REG_ ## reg, value)
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#define snd_hdac_chip_readl(chip, reg) \
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_snd_hdac_chip_readl(chip, AZX_REG_ ## reg)
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#define snd_hdac_chip_readw(chip, reg) \
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_snd_hdac_chip_readw(chip, AZX_REG_ ## reg)
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#define snd_hdac_chip_readb(chip, reg) \
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_snd_hdac_chip_readb(chip, AZX_REG_ ## reg)
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/* update a register, pass without AZX_REG_ prefix */
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#define snd_hdac_chip_updatel(chip, reg, mask, val) \
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snd_hdac_chip_writel(chip, reg, \
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(snd_hdac_chip_readl(chip, reg) & ~(mask)) | (val))
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#define snd_hdac_chip_updatew(chip, reg, mask, val) \
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snd_hdac_chip_writew(chip, reg, \
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(snd_hdac_chip_readw(chip, reg) & ~(mask)) | (val))
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#define snd_hdac_chip_updateb(chip, reg, mask, val) \
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snd_hdac_chip_writeb(chip, reg, \
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(snd_hdac_chip_readb(chip, reg) & ~(mask)) | (val))
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/*
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* HD-audio stream
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*/
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struct hdac_stream {
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struct hdac_bus *bus;
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struct snd_dma_buffer bdl; /* BDL buffer */
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__le32 *posbuf; /* position buffer pointer */
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int direction; /* playback / capture (SNDRV_PCM_STREAM_*) */
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unsigned int bufsize; /* size of the play buffer in bytes */
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unsigned int period_bytes; /* size of the period in bytes */
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unsigned int frags; /* number for period in the play buffer */
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unsigned int fifo_size; /* FIFO size */
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void __iomem *sd_addr; /* stream descriptor pointer */
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u32 sd_int_sta_mask; /* stream int status mask */
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/* pcm support */
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struct snd_pcm_substream *substream; /* assigned substream,
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* set in PCM open
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*/
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unsigned int format_val; /* format value to be set in the
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* controller and the codec
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*/
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unsigned char stream_tag; /* assigned stream */
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unsigned char index; /* stream index */
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int assigned_key; /* last device# key assigned to */
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|
|
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bool opened:1;
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bool running:1;
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bool prepared:1;
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bool no_period_wakeup:1;
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bool locked:1;
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|
|
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/* timestamp */
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unsigned long start_wallclk; /* start + minimum wallclk */
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unsigned long period_wallclk; /* wallclk for period */
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struct timecounter tc;
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struct cyclecounter cc;
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int delay_negative_threshold;
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|
|
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struct list_head list;
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#ifdef CONFIG_SND_HDA_DSP_LOADER
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/* DSP access mutex */
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struct mutex dsp_mutex;
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#endif
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|
};
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|
|
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void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
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int idx, int direction, int tag);
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struct hdac_stream *snd_hdac_stream_assign(struct hdac_bus *bus,
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|
struct snd_pcm_substream *substream);
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|
void snd_hdac_stream_release(struct hdac_stream *azx_dev);
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|
struct hdac_stream *snd_hdac_get_stream(struct hdac_bus *bus,
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|
int dir, int stream_tag);
|
|
|
|
int snd_hdac_stream_setup(struct hdac_stream *azx_dev);
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|
void snd_hdac_stream_cleanup(struct hdac_stream *azx_dev);
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|
int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev);
|
|
int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
|
|
unsigned int format_val);
|
|
void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start);
|
|
void snd_hdac_stream_clear(struct hdac_stream *azx_dev);
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|
void snd_hdac_stream_stop(struct hdac_stream *azx_dev);
|
|
void snd_hdac_stream_reset(struct hdac_stream *azx_dev);
|
|
void snd_hdac_stream_sync_trigger(struct hdac_stream *azx_dev, bool set,
|
|
unsigned int streams, unsigned int reg);
|
|
void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
|
|
unsigned int streams);
|
|
void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
|
|
unsigned int streams);
|
|
/*
|
|
* macros for easy use
|
|
*/
|
|
#define _snd_hdac_stream_write(type, dev, reg, value) \
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|
((dev)->bus->io_ops->reg_write ## type(value, (dev)->sd_addr + (reg)))
|
|
#define _snd_hdac_stream_read(type, dev, reg) \
|
|
((dev)->bus->io_ops->reg_read ## type((dev)->sd_addr + (reg)))
|
|
|
|
/* read/write a register, pass without AZX_REG_ prefix */
|
|
#define snd_hdac_stream_writel(dev, reg, value) \
|
|
_snd_hdac_stream_write(l, dev, AZX_REG_ ## reg, value)
|
|
#define snd_hdac_stream_writew(dev, reg, value) \
|
|
_snd_hdac_stream_write(w, dev, AZX_REG_ ## reg, value)
|
|
#define snd_hdac_stream_writeb(dev, reg, value) \
|
|
_snd_hdac_stream_write(b, dev, AZX_REG_ ## reg, value)
|
|
#define snd_hdac_stream_readl(dev, reg) \
|
|
_snd_hdac_stream_read(l, dev, AZX_REG_ ## reg)
|
|
#define snd_hdac_stream_readw(dev, reg) \
|
|
_snd_hdac_stream_read(w, dev, AZX_REG_ ## reg)
|
|
#define snd_hdac_stream_readb(dev, reg) \
|
|
_snd_hdac_stream_read(b, dev, AZX_REG_ ## reg)
|
|
|
|
/* update a register, pass without AZX_REG_ prefix */
|
|
#define snd_hdac_stream_updatel(dev, reg, mask, val) \
|
|
snd_hdac_stream_writel(dev, reg, \
|
|
(snd_hdac_stream_readl(dev, reg) & \
|
|
~(mask)) | (val))
|
|
#define snd_hdac_stream_updatew(dev, reg, mask, val) \
|
|
snd_hdac_stream_writew(dev, reg, \
|
|
(snd_hdac_stream_readw(dev, reg) & \
|
|
~(mask)) | (val))
|
|
#define snd_hdac_stream_updateb(dev, reg, mask, val) \
|
|
snd_hdac_stream_writeb(dev, reg, \
|
|
(snd_hdac_stream_readb(dev, reg) & \
|
|
~(mask)) | (val))
|
|
|
|
#ifdef CONFIG_SND_HDA_DSP_LOADER
|
|
/* DSP lock helpers */
|
|
#define snd_hdac_dsp_lock_init(dev) mutex_init(&(dev)->dsp_mutex)
|
|
#define snd_hdac_dsp_lock(dev) mutex_lock(&(dev)->dsp_mutex)
|
|
#define snd_hdac_dsp_unlock(dev) mutex_unlock(&(dev)->dsp_mutex)
|
|
#define snd_hdac_stream_is_locked(dev) ((dev)->locked)
|
|
/* DSP loader helpers */
|
|
int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
|
|
unsigned int byte_size, struct snd_dma_buffer *bufp);
|
|
void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start);
|
|
void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
|
|
struct snd_dma_buffer *dmab);
|
|
#else /* CONFIG_SND_HDA_DSP_LOADER */
|
|
#define snd_hdac_dsp_lock_init(dev) do {} while (0)
|
|
#define snd_hdac_dsp_lock(dev) do {} while (0)
|
|
#define snd_hdac_dsp_unlock(dev) do {} while (0)
|
|
#define snd_hdac_stream_is_locked(dev) 0
|
|
|
|
static inline int
|
|
snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
|
|
unsigned int byte_size, struct snd_dma_buffer *bufp)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
|
|
{
|
|
}
|
|
|
|
static inline void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
|
|
struct snd_dma_buffer *dmab)
|
|
{
|
|
}
|
|
#endif /* CONFIG_SND_HDA_DSP_LOADER */
|
|
|
|
|
|
/*
|
|
* generic array helpers
|
|
*/
|
|
void *snd_array_new(struct snd_array *array);
|
|
void snd_array_free(struct snd_array *array);
|
|
static inline void snd_array_init(struct snd_array *array, unsigned int size,
|
|
unsigned int align)
|
|
{
|
|
array->elem_size = size;
|
|
array->alloc_align = align;
|
|
}
|
|
|
|
static inline void *snd_array_elem(struct snd_array *array, unsigned int idx)
|
|
{
|
|
return array->list + idx * array->elem_size;
|
|
}
|
|
|
|
static inline unsigned int snd_array_index(struct snd_array *array, void *ptr)
|
|
{
|
|
return (unsigned long)(ptr - array->list) / array->elem_size;
|
|
}
|
|
|
|
/* a helper macro to iterate for each snd_array element */
|
|
#define snd_array_for_each(array, idx, ptr) \
|
|
for ((idx) = 0, (ptr) = (array)->list; (idx) < (array)->used; \
|
|
(ptr) = snd_array_elem(array, ++(idx)))
|
|
|
|
#endif /* __SOUND_HDAUDIO_H */
|