include/sound/hdaudio.h

   1 /*
   2  * HD-audio core stuff
   3  */
   4
   5 #ifndef __SOUND_HDAUDIO_H
   6 #define __SOUND_HDAUDIO_H
   7
   8 #include <linux/device.h>
   9 #include <linux/interrupt.h>
  10 #include <linux/timecounter.h>
  11 #include <sound/core.h>
  12 #include <sound/memalloc.h>
  13 #include <sound/hda_verbs.h>
  14 #include <drm/i915_component.h>
  15
  16 /* codec node id */
  17 typedef u16 hda_nid_t;
  18
  19 struct hdac_bus;
  20 struct hdac_stream;
  21 struct hdac_device;
  22 struct hdac_driver;
  23 struct hdac_widget_tree;
  24 struct hda_device_id;
  25
  26 /*
  27  * exported bus type
  28  */
  29 extern struct bus_type snd_hda_bus_type;
  30
  31 /*
  32  * generic arrays
  33  */
  34 struct snd_array {
  35         unsigned int used;
  36         unsigned int alloced;
  37         unsigned int elem_size;
  38         unsigned int alloc_align;
  39         void *list;
  40 };
  41
  42 /*
  43  * HD-audio codec base device
  44  */
  45 struct hdac_device {
  46         struct device dev;
  47         int type;
  48         struct hdac_bus *bus;
  49         unsigned int addr;              /* codec address */
  50         struct list_head list;          /* list point for bus codec_list */
  51
  52         hda_nid_t afg;                  /* AFG node id */
  53         hda_nid_t mfg;                  /* MFG node id */
  54
  55         /* ids */
  56         unsigned int vendor_id;
  57         unsigned int subsystem_id;
  58         unsigned int revision_id;
  59         unsigned int afg_function_id;
  60         unsigned int mfg_function_id;
  61         unsigned int afg_unsol:1;
  62         unsigned int mfg_unsol:1;
  63
  64         unsigned int power_caps;        /* FG power caps */
  65
  66         const char *vendor_name;        /* codec vendor name */
  67         const char *chip_name;          /* codec chip name */
  68
  69         /* verb exec op override */
  70         int (*exec_verb)(struct hdac_device *dev, unsigned int cmd,
  71                          unsigned int flags, unsigned int *res);
  72
  73         /* widgets */
  74         unsigned int num_nodes;
  75         hda_nid_t start_nid, end_nid;
  76
  77         /* misc flags */
  78         atomic_t in_pm;         /* suspend/resume being performed */
  79         bool  link_power_control:1;
  80
  81         /* sysfs */
  82         struct hdac_widget_tree *widgets;
  83
  84         /* regmap */
  85         struct regmap *regmap;
  86         struct snd_array vendor_verbs;
  87         bool lazy_cache:1;      /* don't wake up for writes */
  88         bool caps_overwriting:1; /* caps overwrite being in process */
  89         bool cache_coef:1;      /* cache COEF read/write too */
  90 };
  91
  92 /* device/driver type used for matching */
  93 enum {
  94         HDA_DEV_CORE,
  95         HDA_DEV_LEGACY,
  96         HDA_DEV_ASOC,
  97 };
  98
  99 /* direction */
 100 enum {
 101         HDA_INPUT, HDA_OUTPUT
 102 };
 103
 104 #define dev_to_hdac_dev(_dev)   container_of(_dev, struct hdac_device, dev)
 105
 106 int snd_hdac_device_init(struct hdac_device *dev, struct hdac_bus *bus,
 107                          const char *name, unsigned int addr);
 108 void snd_hdac_device_exit(struct hdac_device *dev);
 109 int snd_hdac_device_register(struct hdac_device *codec);
 110 void snd_hdac_device_unregister(struct hdac_device *codec);
 111 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name);
 112 int snd_hdac_codec_modalias(struct hdac_device *hdac, char *buf, size_t size);
 113
 114 int snd_hdac_refresh_widgets(struct hdac_device *codec);
 115 int snd_hdac_refresh_widget_sysfs(struct hdac_device *codec);
 116
 117 unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
 118                                unsigned int verb, unsigned int parm);
 119 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
 120                        unsigned int flags, unsigned int *res);
 121 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
 122                   unsigned int verb, unsigned int parm, unsigned int *res);
 123 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
 124                         unsigned int *res);
 125 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
 126                                 int parm);
 127 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
 128                            unsigned int parm, unsigned int val);
 129 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
 130                              hda_nid_t *conn_list, int max_conns);
 131 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
 132                            hda_nid_t *start_id);
 133 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
 134                                          unsigned int channels,
 135                                          unsigned int format,
 136                                          unsigned int maxbps,
 137                                          unsigned short spdif_ctls);
 138 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
 139                                 u32 *ratesp, u64 *formatsp, unsigned int *bpsp);
 140 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
 141                                   unsigned int format);
 142
 143 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
 144                         int flags, unsigned int verb, unsigned int parm);
 145 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
 146                         int flags, unsigned int verb, unsigned int parm);
 147 bool snd_hdac_check_power_state(struct hdac_device *hdac,
 148                 hda_nid_t nid, unsigned int target_state);
 149 /**
 150  * snd_hdac_read_parm - read a codec parameter
 151  * @codec: the codec object
 152  * @nid: NID to read a parameter
 153  * @parm: parameter to read
 154  *
 155  * Returns -1 for error.  If you need to distinguish the error more
 156  * strictly, use _snd_hdac_read_parm() directly.
 157  */
 158 static inline int snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid,
 159                                      int parm)
 160 {
 161         unsigned int val;
 162
 163         return _snd_hdac_read_parm(codec, nid, parm, &val) < 0 ? -1 : val;
 164 }
 165
 166 #ifdef CONFIG_PM
 167 int snd_hdac_power_up(struct hdac_device *codec);
 168 int snd_hdac_power_down(struct hdac_device *codec);
 169 int snd_hdac_power_up_pm(struct hdac_device *codec);
 170 int snd_hdac_power_down_pm(struct hdac_device *codec);
 171 #else
 172 static inline int snd_hdac_power_up(struct hdac_device *codec) { return 0; }
 173 static inline int snd_hdac_power_down(struct hdac_device *codec) { return 0; }
 174 static inline int snd_hdac_power_up_pm(struct hdac_device *codec) { return 0; }
 175 static inline int snd_hdac_power_down_pm(struct hdac_device *codec) { return 0; }
 176 #endif
 177
 178 /*
 179  * HD-audio codec base driver
 180  */
 181 struct hdac_driver {
 182         struct device_driver driver;
 183         int type;
 184         const struct hda_device_id *id_table;
 185         int (*match)(struct hdac_device *dev, struct hdac_driver *drv);
 186         void (*unsol_event)(struct hdac_device *dev, unsigned int event);
 187 };
 188
 189 #define drv_to_hdac_driver(_drv) container_of(_drv, struct hdac_driver, driver)
 190
 191 const struct hda_device_id *
 192 hdac_get_device_id(struct hdac_device *hdev, struct hdac_driver *drv);
 193
 194 /*
 195  * Bus verb operators
 196  */
 197 struct hdac_bus_ops {
 198         /* send a single command */
 199         int (*command)(struct hdac_bus *bus, unsigned int cmd);
 200         /* get a response from the last command */
 201         int (*get_response)(struct hdac_bus *bus, unsigned int addr,
 202                             unsigned int *res);
 203         /* control the link power  */
 204         int (*link_power)(struct hdac_bus *bus, bool enable);
 205 };
 206
 207 /*
 208  * Lowlevel I/O operators
 209  */
 210 struct hdac_io_ops {
 211         /* mapped register accesses */
 212         void (*reg_writel)(u32 value, u32 __iomem *addr);
 213         u32 (*reg_readl)(u32 __iomem *addr);
 214         void (*reg_writew)(u16 value, u16 __iomem *addr);
 215         u16 (*reg_readw)(u16 __iomem *addr);
 216         void (*reg_writeb)(u8 value, u8 __iomem *addr);
 217         u8 (*reg_readb)(u8 __iomem *addr);
 218         /* Allocation ops */
 219         int (*dma_alloc_pages)(struct hdac_bus *bus, int type, size_t size,
 220                                struct snd_dma_buffer *buf);
 221         void (*dma_free_pages)(struct hdac_bus *bus,
 222                                struct snd_dma_buffer *buf);
 223 };
 224
 225 #define HDA_UNSOL_QUEUE_SIZE    64
 226 #define HDA_MAX_CODECS          8       /* limit by controller side */
 227
 228 /* HD Audio class code */
 229 #define PCI_CLASS_MULTIMEDIA_HD_AUDIO   0x0403
 230
 231 /*
 232  * CORB/RIRB
 233  *
 234  * Each CORB entry is 4byte, RIRB is 8byte
 235  */
 236 struct hdac_rb {
 237         __le32 *buf;            /* virtual address of CORB/RIRB buffer */
 238         dma_addr_t addr;        /* physical address of CORB/RIRB buffer */
 239         unsigned short rp, wp;  /* RIRB read/write pointers */
 240         int cmds[HDA_MAX_CODECS];       /* number of pending requests */
 241         u32 res[HDA_MAX_CODECS];        /* last read value */
 242 };
 243
 244 /*
 245  * HD-audio bus base driver
 246  */
 247 struct hdac_bus {
 248         struct device *dev;
 249         const struct hdac_bus_ops *ops;
 250         const struct hdac_io_ops *io_ops;
 251
 252         /* h/w resources */
 253         unsigned long addr;
 254         void __iomem *remap_addr;
 255         int irq;
 256
 257         /* codec linked list */
 258         struct list_head codec_list;
 259         unsigned int num_codecs;
 260
 261         /* link caddr -> codec */
 262         struct hdac_device *caddr_tbl[HDA_MAX_CODEC_ADDRESS + 1];
 263
 264         /* unsolicited event queue */
 265         u32 unsol_queue[HDA_UNSOL_QUEUE_SIZE * 2]; /* ring buffer */
 266         unsigned int unsol_rp, unsol_wp;
 267         struct work_struct unsol_work;
 268
 269         /* bit flags of detected codecs */
 270         unsigned long codec_mask;
 271
 272         /* bit flags of powered codecs */
 273         unsigned long codec_powered;
 274
 275         /* CORB/RIRB */
 276         struct hdac_rb corb;
 277         struct hdac_rb rirb;
 278         unsigned int last_cmd[HDA_MAX_CODECS];  /* last sent command */
 279
 280         /* CORB/RIRB and position buffers */
 281         struct snd_dma_buffer rb;
 282         struct snd_dma_buffer posbuf;
 283
 284         /* hdac_stream linked list */
 285         struct list_head stream_list;
 286
 287         /* operation state */
 288         bool chip_init:1;               /* h/w initialized */
 289
 290         /* behavior flags */
 291         bool sync_write:1;              /* sync after verb write */
 292         bool use_posbuf:1;              /* use position buffer */
 293         bool snoop:1;                   /* enable snooping */
 294         bool align_bdle_4k:1;           /* BDLE align 4K boundary */
 295         bool reverse_assign:1;          /* assign devices in reverse order */
 296         bool corbrp_self_clear:1;       /* CORBRP clears itself after reset */
 297
 298         int bdl_pos_adj;                /* BDL position adjustment */
 299
 300         /* locks */
 301         spinlock_t reg_lock;
 302         struct mutex cmd_mutex;
 303
 304         /* i915 component interface */
 305         struct i915_audio_component *audio_component;
 306         int i915_power_refcount;
 307 };
 308
 309 int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
 310                       const struct hdac_bus_ops *ops,
 311                       const struct hdac_io_ops *io_ops);
 312 void snd_hdac_bus_exit(struct hdac_bus *bus);
 313 int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr,
 314                            unsigned int cmd, unsigned int *res);
 315 int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,
 316                                     unsigned int cmd, unsigned int *res);
 317 void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex);
 318
 319 int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec);
 320 void snd_hdac_bus_remove_device(struct hdac_bus *bus,
 321                                 struct hdac_device *codec);
 322
 323 static inline void snd_hdac_codec_link_up(struct hdac_device *codec)
 324 {
 325         set_bit(codec->addr, &codec->bus->codec_powered);
 326 }
 327
 328 static inline void snd_hdac_codec_link_down(struct hdac_device *codec)
 329 {
 330         clear_bit(codec->addr, &codec->bus->codec_powered);
 331 }
 332
 333 int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val);
 334 int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
 335                               unsigned int *res);
 336 int snd_hdac_link_power(struct hdac_device *codec, bool enable);
 337
 338 bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset);
 339 void snd_hdac_bus_stop_chip(struct hdac_bus *bus);
 340 void snd_hdac_bus_init_cmd_io(struct hdac_bus *bus);
 341 void snd_hdac_bus_stop_cmd_io(struct hdac_bus *bus);
 342 void snd_hdac_bus_enter_link_reset(struct hdac_bus *bus);
 343 void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus);
 344
 345 void snd_hdac_bus_update_rirb(struct hdac_bus *bus);
 346 int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
 347                                     void (*ack)(struct hdac_bus *,
 348                                                 struct hdac_stream *));
 349
 350 int snd_hdac_bus_alloc_stream_pages(struct hdac_bus *bus);
 351 void snd_hdac_bus_free_stream_pages(struct hdac_bus *bus);
 352
 353 /*
 354  * macros for easy use
 355  */
 356 #define _snd_hdac_chip_write(type, chip, reg, value) \
 357         ((chip)->io_ops->reg_write ## type(value, (chip)->remap_addr + (reg)))
 358 #define _snd_hdac_chip_read(type, chip, reg) \
 359         ((chip)->io_ops->reg_read ## type((chip)->remap_addr + (reg)))
 360
 361 /* read/write a register, pass without AZX_REG_ prefix */
 362 #define snd_hdac_chip_writel(chip, reg, value) \
 363         _snd_hdac_chip_write(l, chip, AZX_REG_ ## reg, value)
 364 #define snd_hdac_chip_writew(chip, reg, value) \
 365         _snd_hdac_chip_write(w, chip, AZX_REG_ ## reg, value)
 366 #define snd_hdac_chip_writeb(chip, reg, value) \
 367         _snd_hdac_chip_write(b, chip, AZX_REG_ ## reg, value)
 368 #define snd_hdac_chip_readl(chip, reg) \
 369         _snd_hdac_chip_read(l, chip, AZX_REG_ ## reg)
 370 #define snd_hdac_chip_readw(chip, reg) \
 371         _snd_hdac_chip_read(w, chip, AZX_REG_ ## reg)
 372 #define snd_hdac_chip_readb(chip, reg) \
 373         _snd_hdac_chip_read(b, chip, AZX_REG_ ## reg)
 374
 375 /* update a register, pass without AZX_REG_ prefix */
 376 #define snd_hdac_chip_updatel(chip, reg, mask, val) \
 377         snd_hdac_chip_writel(chip, reg, \
 378                              (snd_hdac_chip_readl(chip, reg) & ~(mask)) | (val))
 379 #define snd_hdac_chip_updatew(chip, reg, mask, val) \
 380         snd_hdac_chip_writew(chip, reg, \
 381                              (snd_hdac_chip_readw(chip, reg) & ~(mask)) | (val))
 382 #define snd_hdac_chip_updateb(chip, reg, mask, val) \
 383         snd_hdac_chip_writeb(chip, reg, \
 384                              (snd_hdac_chip_readb(chip, reg) & ~(mask)) | (val))
 385
 386 /*
 387  * HD-audio stream
 388  */
 389 struct hdac_stream {
 390         struct hdac_bus *bus;
 391         struct snd_dma_buffer bdl; /* BDL buffer */
 392         __le32 *posbuf;         /* position buffer pointer */
 393         int direction;          /* playback / capture (SNDRV_PCM_STREAM_*) */
 394
 395         unsigned int bufsize;   /* size of the play buffer in bytes */
 396         unsigned int period_bytes; /* size of the period in bytes */
 397         unsigned int frags;     /* number for period in the play buffer */
 398         unsigned int fifo_size; /* FIFO size */
 399
 400         void __iomem *sd_addr;  /* stream descriptor pointer */
 401
 402         u32 sd_int_sta_mask;    /* stream int status mask */
 403
 404         /* pcm support */
 405         struct snd_pcm_substream *substream;    /* assigned substream,
 406                                                  * set in PCM open
 407                                                  */
 408         unsigned int format_val;        /* format value to be set in the
 409                                          * controller and the codec
 410                                          */
 411         unsigned char stream_tag;       /* assigned stream */
 412         unsigned char index;            /* stream index */
 413         int assigned_key;               /* last device# key assigned to */
 414
 415         bool opened:1;
 416         bool running:1;
 417         bool prepared:1;
 418         bool no_period_wakeup:1;
 419         bool locked:1;
 420
 421         /* timestamp */
 422         unsigned long start_wallclk;    /* start + minimum wallclk */
 423         unsigned long period_wallclk;   /* wallclk for period */
 424         struct timecounter  tc;
 425         struct cyclecounter cc;
 426         int delay_negative_threshold;
 427
 428         struct list_head list;
 429 #ifdef CONFIG_SND_HDA_DSP_LOADER
 430         /* DSP access mutex */
 431         struct mutex dsp_mutex;
 432 #endif
 433 };
 434
 435 void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
 436                           int idx, int direction, int tag);
 437 struct hdac_stream *snd_hdac_stream_assign(struct hdac_bus *bus,
 438                                            struct snd_pcm_substream *substream);
 439 void snd_hdac_stream_release(struct hdac_stream *azx_dev);
 440 struct hdac_stream *snd_hdac_get_stream(struct hdac_bus *bus,
 441                                         int dir, int stream_tag);
 442
 443 int snd_hdac_stream_setup(struct hdac_stream *azx_dev);
 444 void snd_hdac_stream_cleanup(struct hdac_stream *azx_dev);
 445 int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev);
 446 int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
 447                                 unsigned int format_val);
 448 void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start);
 449 void snd_hdac_stream_clear(struct hdac_stream *azx_dev);
 450 void snd_hdac_stream_stop(struct hdac_stream *azx_dev);
 451 void snd_hdac_stream_reset(struct hdac_stream *azx_dev);
 452 void snd_hdac_stream_sync_trigger(struct hdac_stream *azx_dev, bool set,
 453                                   unsigned int streams, unsigned int reg);
 454 void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
 455                           unsigned int streams);
 456 void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
 457                                       unsigned int streams);
 458 /*
 459  * macros for easy use
 460  */
 461 #define _snd_hdac_stream_write(type, dev, reg, value)                   \
 462         ((dev)->bus->io_ops->reg_write ## type(value, (dev)->sd_addr + (reg)))
 463 #define _snd_hdac_stream_read(type, dev, reg)                           \
 464         ((dev)->bus->io_ops->reg_read ## type((dev)->sd_addr + (reg)))
 465
 466 /* read/write a register, pass without AZX_REG_ prefix */
 467 #define snd_hdac_stream_writel(dev, reg, value) \
 468         _snd_hdac_stream_write(l, dev, AZX_REG_ ## reg, value)
 469 #define snd_hdac_stream_writew(dev, reg, value) \
 470         _snd_hdac_stream_write(w, dev, AZX_REG_ ## reg, value)
 471 #define snd_hdac_stream_writeb(dev, reg, value) \
 472         _snd_hdac_stream_write(b, dev, AZX_REG_ ## reg, value)
 473 #define snd_hdac_stream_readl(dev, reg) \
 474         _snd_hdac_stream_read(l, dev, AZX_REG_ ## reg)
 475 #define snd_hdac_stream_readw(dev, reg) \
 476         _snd_hdac_stream_read(w, dev, AZX_REG_ ## reg)
 477 #define snd_hdac_stream_readb(dev, reg) \
 478         _snd_hdac_stream_read(b, dev, AZX_REG_ ## reg)
 479
 480 /* update a register, pass without AZX_REG_ prefix */
 481 #define snd_hdac_stream_updatel(dev, reg, mask, val) \
 482         snd_hdac_stream_writel(dev, reg, \
 483                                (snd_hdac_stream_readl(dev, reg) & \
 484                                 ~(mask)) | (val))
 485 #define snd_hdac_stream_updatew(dev, reg, mask, val) \
 486         snd_hdac_stream_writew(dev, reg, \
 487                                (snd_hdac_stream_readw(dev, reg) & \
 488                                 ~(mask)) | (val))
 489 #define snd_hdac_stream_updateb(dev, reg, mask, val) \
 490         snd_hdac_stream_writeb(dev, reg, \
 491                                (snd_hdac_stream_readb(dev, reg) & \
 492                                 ~(mask)) | (val))
 493
 494 #ifdef CONFIG_SND_HDA_DSP_LOADER
 495 /* DSP lock helpers */
 496 #define snd_hdac_dsp_lock_init(dev)     mutex_init(&(dev)->dsp_mutex)
 497 #define snd_hdac_dsp_lock(dev)          mutex_lock(&(dev)->dsp_mutex)
 498 #define snd_hdac_dsp_unlock(dev)        mutex_unlock(&(dev)->dsp_mutex)
 499 #define snd_hdac_stream_is_locked(dev)  ((dev)->locked)
 500 /* DSP loader helpers */
 501 int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
 502                          unsigned int byte_size, struct snd_dma_buffer *bufp);
 503 void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start);
 504 void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
 505                           struct snd_dma_buffer *dmab);
 506 #else /* CONFIG_SND_HDA_DSP_LOADER */
 507 #define snd_hdac_dsp_lock_init(dev)     do {} while (0)
 508 #define snd_hdac_dsp_lock(dev)          do {} while (0)
 509 #define snd_hdac_dsp_unlock(dev)        do {} while (0)
 510 #define snd_hdac_stream_is_locked(dev)  0
 511
 512 static inline int
 513 snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
 514                      unsigned int byte_size, struct snd_dma_buffer *bufp)
 515 {
 516         return 0;
 517 }
 518
 519 static inline void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
 520 {
 521 }
 522
 523 static inline void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
 524                                         struct snd_dma_buffer *dmab)
 525 {
 526 }
 527 #endif /* CONFIG_SND_HDA_DSP_LOADER */
 528
 529
 530 /*
 531  * generic array helpers
 532  */
 533 void *snd_array_new(struct snd_array *array);
 534 void snd_array_free(struct snd_array *array);
 535 static inline void snd_array_init(struct snd_array *array, unsigned int size,
 536                                   unsigned int align)
 537 {
 538         array->elem_size = size;
 539         array->alloc_align = align;
 540 }
 541
 542 static inline void *snd_array_elem(struct snd_array *array, unsigned int idx)
 543 {
 544         return array->list + idx * array->elem_size;
 545 }
 546
 547 static inline unsigned int snd_array_index(struct snd_array *array, void *ptr)
 548 {
 549         return (unsigned long)(ptr - array->list) / array->elem_size;
 550 }
 551
 552 #endif /* __SOUND_HDAUDIO_H */