include/sound/hdaudio.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * HD-audio core stuff
   4  */
   5
   6 #ifndef __SOUND_HDAUDIO_H
   7 #define __SOUND_HDAUDIO_H
   8
   9 #include <linux/device.h>
  10 #include <linux/interrupt.h>
  11 #include <linux/timecounter.h>
  12 #include <sound/core.h>
  13 #include <sound/memalloc.h>
  14 #include <sound/hda_verbs.h>
  15 #include <drm/i915_component.h>
  16
  17 /* codec node id */
  18 typedef u16 hda_nid_t;
  19
  20 struct hdac_bus;
  21 struct hdac_stream;
  22 struct hdac_device;
  23 struct hdac_driver;
  24 struct hdac_widget_tree;
  25 struct hda_device_id;
  26
  27 /*
  28  * exported bus type
  29  */
  30 extern struct bus_type snd_hda_bus_type;
  31
  32 /*
  33  * generic arrays
  34  */
  35 struct snd_array {
  36         unsigned int used;
  37         unsigned int alloced;
  38         unsigned int elem_size;
  39         unsigned int alloc_align;
  40         void *list;
  41 };
  42
  43 /*
  44  * HD-audio codec base device
  45  */
  46 struct hdac_device {
  47         struct device dev;
  48         int type;
  49         struct hdac_bus *bus;
  50         unsigned int addr;              /* codec address */
  51         struct list_head list;          /* list point for bus codec_list */
  52
  53         hda_nid_t afg;                  /* AFG node id */
  54         hda_nid_t mfg;                  /* MFG node id */
  55
  56         /* ids */
  57         unsigned int vendor_id;
  58         unsigned int subsystem_id;
  59         unsigned int revision_id;
  60         unsigned int afg_function_id;
  61         unsigned int mfg_function_id;
  62         unsigned int afg_unsol:1;
  63         unsigned int mfg_unsol:1;
  64
  65         unsigned int power_caps;        /* FG power caps */
  66
  67         const char *vendor_name;        /* codec vendor name */
  68         const char *chip_name;          /* codec chip name */
  69
  70         /* verb exec op override */
  71         int (*exec_verb)(struct hdac_device *dev, unsigned int cmd,
  72                          unsigned int flags, unsigned int *res);
  73
  74         /* widgets */
  75         unsigned int num_nodes;
  76         hda_nid_t start_nid, end_nid;
  77
  78         /* misc flags */
  79         atomic_t in_pm;         /* suspend/resume being performed */
  80         bool  link_power_control:1;
  81
  82         /* sysfs */
  83         struct hdac_widget_tree *widgets;
  84
  85         /* regmap */
  86         struct regmap *regmap;
  87         struct snd_array vendor_verbs;
  88         bool lazy_cache:1;      /* don't wake up for writes */
  89         bool caps_overwriting:1; /* caps overwrite being in process */
  90         bool cache_coef:1;      /* cache COEF read/write too */
  91 };
  92
  93 /* device/driver type used for matching */
  94 enum {
  95         HDA_DEV_CORE,
  96         HDA_DEV_LEGACY,
  97         HDA_DEV_ASOC,
  98 };
  99
 100 /* direction */
 101 enum {
 102         HDA_INPUT, HDA_OUTPUT
 103 };
 104
 105 #define dev_to_hdac_dev(_dev)   container_of(_dev, struct hdac_device, dev)
 106
 107 int snd_hdac_device_init(struct hdac_device *dev, struct hdac_bus *bus,
 108                          const char *name, unsigned int addr);
 109 void snd_hdac_device_exit(struct hdac_device *dev);
 110 int snd_hdac_device_register(struct hdac_device *codec);
 111 void snd_hdac_device_unregister(struct hdac_device *codec);
 112 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name);
 113 int snd_hdac_codec_modalias(struct hdac_device *hdac, char *buf, size_t size);
 114
 115 int snd_hdac_refresh_widgets(struct hdac_device *codec, bool sysfs);
 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 int snd_hdac_keep_power_up(struct hdac_device *codec);
 172 #else
 173 static inline int snd_hdac_power_up(struct hdac_device *codec) { return 0; }
 174 static inline int snd_hdac_power_down(struct hdac_device *codec) { return 0; }
 175 static inline int snd_hdac_power_up_pm(struct hdac_device *codec) { return 0; }
 176 static inline int snd_hdac_power_down_pm(struct hdac_device *codec) { return 0; }
 177 static inline int snd_hdac_keep_power_up(struct hdac_device *codec) { return 0; }
 178 #endif
 179
 180 /*
 181  * HD-audio codec base driver
 182  */
 183 struct hdac_driver {
 184         struct device_driver driver;
 185         int type;
 186         const struct hda_device_id *id_table;
 187         int (*match)(struct hdac_device *dev, struct hdac_driver *drv);
 188         void (*unsol_event)(struct hdac_device *dev, unsigned int event);
 189 };
 190
 191 #define drv_to_hdac_driver(_drv) container_of(_drv, struct hdac_driver, driver)
 192
 193 const struct hda_device_id *
 194 hdac_get_device_id(struct hdac_device *hdev, struct hdac_driver *drv);
 195
 196 /*
 197  * Bus verb operators
 198  */
 199 struct hdac_bus_ops {
 200         /* send a single command */
 201         int (*command)(struct hdac_bus *bus, unsigned int cmd);
 202         /* get a response from the last command */
 203         int (*get_response)(struct hdac_bus *bus, unsigned int addr,
 204                             unsigned int *res);
 205         /* control the link power  */
 206         int (*link_power)(struct hdac_bus *bus, bool enable);
 207 };
 208
 209 /*
 210  * Lowlevel I/O operators
 211  */
 212 struct hdac_io_ops {
 213         /* mapped register accesses */
 214         void (*reg_writel)(u32 value, u32 __iomem *addr);
 215         u32 (*reg_readl)(u32 __iomem *addr);
 216         void (*reg_writew)(u16 value, u16 __iomem *addr);
 217         u16 (*reg_readw)(u16 __iomem *addr);
 218         void (*reg_writeb)(u8 value, u8 __iomem *addr);
 219         u8 (*reg_readb)(u8 __iomem *addr);
 220         /* Allocation ops */
 221         int (*dma_alloc_pages)(struct hdac_bus *bus, int type, size_t size,
 222                                struct snd_dma_buffer *buf);
 223         void (*dma_free_pages)(struct hdac_bus *bus,
 224                                struct snd_dma_buffer *buf);
 225 };
 226
 227 #define HDA_UNSOL_QUEUE_SIZE    64
 228 #define HDA_MAX_CODECS          8       /* limit by controller side */
 229
 230 /* HD Audio class code */
 231 #define PCI_CLASS_MULTIMEDIA_HD_AUDIO   0x0403
 232
 233 /*
 234  * CORB/RIRB
 235  *
 236  * Each CORB entry is 4byte, RIRB is 8byte
 237  */
 238 struct hdac_rb {
 239         __le32 *buf;            /* virtual address of CORB/RIRB buffer */
 240         dma_addr_t addr;        /* physical address of CORB/RIRB buffer */
 241         unsigned short rp, wp;  /* RIRB read/write pointers */
 242         int cmds[HDA_MAX_CODECS];       /* number of pending requests */
 243         u32 res[HDA_MAX_CODECS];        /* last read value */
 244 };
 245
 246 /*
 247  * HD-audio bus base driver
 248  *
 249  * @ppcap: pp capabilities pointer
 250  * @spbcap: SPIB capabilities pointer
 251  * @mlcap: MultiLink capabilities pointer
 252  * @gtscap: gts capabilities pointer
 253  * @drsmcap: dma resume capabilities pointer
 254  */
 255 struct hdac_bus {
 256         struct device *dev;
 257         const struct hdac_bus_ops *ops;
 258         const struct hdac_io_ops *io_ops;
 259
 260         /* h/w resources */
 261         unsigned long addr;
 262         void __iomem *remap_addr;
 263         int irq;
 264
 265         void __iomem *ppcap;
 266         void __iomem *spbcap;
 267         void __iomem *mlcap;
 268         void __iomem *gtscap;
 269         void __iomem *drsmcap;
 270
 271         /* codec linked list */
 272         struct list_head codec_list;
 273         unsigned int num_codecs;
 274
 275         /* link caddr -> codec */
 276         struct hdac_device *caddr_tbl[HDA_MAX_CODEC_ADDRESS + 1];
 277
 278         /* unsolicited event queue */
 279         u32 unsol_queue[HDA_UNSOL_QUEUE_SIZE * 2]; /* ring buffer */
 280         unsigned int unsol_rp, unsol_wp;
 281         struct work_struct unsol_work;
 282
 283         /* bit flags of detected codecs */
 284         unsigned long codec_mask;
 285
 286         /* bit flags of powered codecs */
 287         unsigned long codec_powered;
 288
 289         /* CORB/RIRB */
 290         struct hdac_rb corb;
 291         struct hdac_rb rirb;
 292         unsigned int last_cmd[HDA_MAX_CODECS];  /* last sent command */
 293
 294         /* CORB/RIRB and position buffers */
 295         struct snd_dma_buffer rb;
 296         struct snd_dma_buffer posbuf;
 297
 298         /* hdac_stream linked list */
 299         struct list_head stream_list;
 300
 301         /* operation state */
 302         bool chip_init:1;               /* h/w initialized */
 303
 304         /* behavior flags */
 305         bool sync_write:1;              /* sync after verb write */
 306         bool use_posbuf:1;              /* use position buffer */
 307         bool snoop:1;                   /* enable snooping */
 308         bool align_bdle_4k:1;           /* BDLE align 4K boundary */
 309         bool reverse_assign:1;          /* assign devices in reverse order */
 310         bool corbrp_self_clear:1;       /* CORBRP clears itself after reset */
 311
 312         int bdl_pos_adj;                /* BDL position adjustment */
 313
 314         /* locks */
 315         spinlock_t reg_lock;
 316         struct mutex cmd_mutex;
 317
 318         /* i915 component interface */
 319         struct i915_audio_component *audio_component;
 320         int i915_power_refcount;
 321 };
 322
 323 int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
 324                       const struct hdac_bus_ops *ops,
 325                       const struct hdac_io_ops *io_ops);
 326 void snd_hdac_bus_exit(struct hdac_bus *bus);
 327 int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr,
 328                            unsigned int cmd, unsigned int *res);
 329 int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,
 330                                     unsigned int cmd, unsigned int *res);
 331 void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex);
 332
 333 int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec);
 334 void snd_hdac_bus_remove_device(struct hdac_bus *bus,
 335                                 struct hdac_device *codec);
 336
 337 static inline void snd_hdac_codec_link_up(struct hdac_device *codec)
 338 {
 339         set_bit(codec->addr, &codec->bus->codec_powered);
 340 }
 341
 342 static inline void snd_hdac_codec_link_down(struct hdac_device *codec)
 343 {
 344         clear_bit(codec->addr, &codec->bus->codec_powered);
 345 }
 346
 347 int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val);
 348 int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
 349                               unsigned int *res);
 350 int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus);
 351 int snd_hdac_link_power(struct hdac_device *codec, bool enable);
 352
 353 bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset);
 354 void snd_hdac_bus_stop_chip(struct hdac_bus *bus);
 355 void snd_hdac_bus_init_cmd_io(struct hdac_bus *bus);
 356 void snd_hdac_bus_stop_cmd_io(struct hdac_bus *bus);
 357 void snd_hdac_bus_enter_link_reset(struct hdac_bus *bus);
 358 void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus);
 359
 360 void snd_hdac_bus_update_rirb(struct hdac_bus *bus);
 361 int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
 362                                     void (*ack)(struct hdac_bus *,
 363                                                 struct hdac_stream *));
 364
 365 int snd_hdac_bus_alloc_stream_pages(struct hdac_bus *bus);
 366 void snd_hdac_bus_free_stream_pages(struct hdac_bus *bus);
 367
 368 /*
 369  * macros for easy use
 370  */
 371 #define _snd_hdac_chip_writeb(chip, reg, value) \
 372         ((chip)->io_ops->reg_writeb(value, (chip)->remap_addr + (reg)))
 373 #define _snd_hdac_chip_readb(chip, reg) \
 374         ((chip)->io_ops->reg_readb((chip)->remap_addr + (reg)))
 375 #define _snd_hdac_chip_writew(chip, reg, value) \
 376         ((chip)->io_ops->reg_writew(value, (chip)->remap_addr + (reg)))
 377 #define _snd_hdac_chip_readw(chip, reg) \
 378         ((chip)->io_ops->reg_readw((chip)->remap_addr + (reg)))
 379 #define _snd_hdac_chip_writel(chip, reg, value) \
 380         ((chip)->io_ops->reg_writel(value, (chip)->remap_addr + (reg)))
 381 #define _snd_hdac_chip_readl(chip, reg) \
 382         ((chip)->io_ops->reg_readl((chip)->remap_addr + (reg)))
 383
 384 /* read/write a register, pass without AZX_REG_ prefix */
 385 #define snd_hdac_chip_writel(chip, reg, value) \
 386         _snd_hdac_chip_writel(chip, AZX_REG_ ## reg, value)
 387 #define snd_hdac_chip_writew(chip, reg, value) \
 388         _snd_hdac_chip_writew(chip, AZX_REG_ ## reg, value)
 389 #define snd_hdac_chip_writeb(chip, reg, value) \
 390         _snd_hdac_chip_writeb(chip, AZX_REG_ ## reg, value)
 391 #define snd_hdac_chip_readl(chip, reg) \
 392         _snd_hdac_chip_readl(chip, AZX_REG_ ## reg)
 393 #define snd_hdac_chip_readw(chip, reg) \
 394         _snd_hdac_chip_readw(chip, AZX_REG_ ## reg)
 395 #define snd_hdac_chip_readb(chip, reg) \
 396         _snd_hdac_chip_readb(chip, AZX_REG_ ## reg)
 397
 398 /* update a register, pass without AZX_REG_ prefix */
 399 #define snd_hdac_chip_updatel(chip, reg, mask, val) \
 400         snd_hdac_chip_writel(chip, reg, \
 401                              (snd_hdac_chip_readl(chip, reg) & ~(mask)) | (val))
 402 #define snd_hdac_chip_updatew(chip, reg, mask, val) \
 403         snd_hdac_chip_writew(chip, reg, \
 404                              (snd_hdac_chip_readw(chip, reg) & ~(mask)) | (val))
 405 #define snd_hdac_chip_updateb(chip, reg, mask, val) \
 406         snd_hdac_chip_writeb(chip, reg, \
 407                              (snd_hdac_chip_readb(chip, reg) & ~(mask)) | (val))
 408
 409 /*
 410  * HD-audio stream
 411  */
 412 struct hdac_stream {
 413         struct hdac_bus *bus;
 414         struct snd_dma_buffer bdl; /* BDL buffer */
 415         __le32 *posbuf;         /* position buffer pointer */
 416         int direction;          /* playback / capture (SNDRV_PCM_STREAM_*) */
 417
 418         unsigned int bufsize;   /* size of the play buffer in bytes */
 419         unsigned int period_bytes; /* size of the period in bytes */
 420         unsigned int frags;     /* number for period in the play buffer */
 421         unsigned int fifo_size; /* FIFO size */
 422
 423         void __iomem *sd_addr;  /* stream descriptor pointer */
 424
 425         u32 sd_int_sta_mask;    /* stream int status mask */
 426
 427         /* pcm support */
 428         struct snd_pcm_substream *substream;    /* assigned substream,
 429                                                  * set in PCM open
 430                                                  */
 431         unsigned int format_val;        /* format value to be set in the
 432                                          * controller and the codec
 433                                          */
 434         unsigned char stream_tag;       /* assigned stream */
 435         unsigned char index;            /* stream index */
 436         int assigned_key;               /* last device# key assigned to */
 437
 438         bool opened:1;
 439         bool running:1;
 440         bool prepared:1;
 441         bool no_period_wakeup:1;
 442         bool locked:1;
 443
 444         /* timestamp */
 445         unsigned long start_wallclk;    /* start + minimum wallclk */
 446         unsigned long period_wallclk;   /* wallclk for period */
 447         struct timecounter  tc;
 448         struct cyclecounter cc;
 449         int delay_negative_threshold;
 450
 451         struct list_head list;
 452 #ifdef CONFIG_SND_HDA_DSP_LOADER
 453         /* DSP access mutex */
 454         struct mutex dsp_mutex;
 455 #endif
 456 };
 457
 458 void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
 459                           int idx, int direction, int tag);
 460 struct hdac_stream *snd_hdac_stream_assign(struct hdac_bus *bus,
 461                                            struct snd_pcm_substream *substream);
 462 void snd_hdac_stream_release(struct hdac_stream *azx_dev);
 463 struct hdac_stream *snd_hdac_get_stream(struct hdac_bus *bus,
 464                                         int dir, int stream_tag);
 465
 466 int snd_hdac_stream_setup(struct hdac_stream *azx_dev);
 467 void snd_hdac_stream_cleanup(struct hdac_stream *azx_dev);
 468 int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev);
 469 int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
 470                                 unsigned int format_val);
 471 void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start);
 472 void snd_hdac_stream_clear(struct hdac_stream *azx_dev);
 473 void snd_hdac_stream_stop(struct hdac_stream *azx_dev);
 474 void snd_hdac_stream_reset(struct hdac_stream *azx_dev);
 475 void snd_hdac_stream_sync_trigger(struct hdac_stream *azx_dev, bool set,
 476                                   unsigned int streams, unsigned int reg);
 477 void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
 478                           unsigned int streams);
 479 void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
 480                                       unsigned int streams);
 481 /*
 482  * macros for easy use
 483  */
 484 #define _snd_hdac_stream_write(type, dev, reg, value)                   \
 485         ((dev)->bus->io_ops->reg_write ## type(value, (dev)->sd_addr + (reg)))
 486 #define _snd_hdac_stream_read(type, dev, reg)                           \
 487         ((dev)->bus->io_ops->reg_read ## type((dev)->sd_addr + (reg)))
 488
 489 /* read/write a register, pass without AZX_REG_ prefix */
 490 #define snd_hdac_stream_writel(dev, reg, value) \
 491         _snd_hdac_stream_write(l, dev, AZX_REG_ ## reg, value)
 492 #define snd_hdac_stream_writew(dev, reg, value) \
 493         _snd_hdac_stream_write(w, dev, AZX_REG_ ## reg, value)
 494 #define snd_hdac_stream_writeb(dev, reg, value) \
 495         _snd_hdac_stream_write(b, dev, AZX_REG_ ## reg, value)
 496 #define snd_hdac_stream_readl(dev, reg) \
 497         _snd_hdac_stream_read(l, dev, AZX_REG_ ## reg)
 498 #define snd_hdac_stream_readw(dev, reg) \
 499         _snd_hdac_stream_read(w, dev, AZX_REG_ ## reg)
 500 #define snd_hdac_stream_readb(dev, reg) \
 501         _snd_hdac_stream_read(b, dev, AZX_REG_ ## reg)
 502
 503 /* update a register, pass without AZX_REG_ prefix */
 504 #define snd_hdac_stream_updatel(dev, reg, mask, val) \
 505         snd_hdac_stream_writel(dev, reg, \
 506                                (snd_hdac_stream_readl(dev, reg) & \
 507                                 ~(mask)) | (val))
 508 #define snd_hdac_stream_updatew(dev, reg, mask, val) \
 509         snd_hdac_stream_writew(dev, reg, \
 510                                (snd_hdac_stream_readw(dev, reg) & \
 511                                 ~(mask)) | (val))
 512 #define snd_hdac_stream_updateb(dev, reg, mask, val) \
 513         snd_hdac_stream_writeb(dev, reg, \
 514                                (snd_hdac_stream_readb(dev, reg) & \
 515                                 ~(mask)) | (val))
 516
 517 #ifdef CONFIG_SND_HDA_DSP_LOADER
 518 /* DSP lock helpers */
 519 #define snd_hdac_dsp_lock_init(dev)     mutex_init(&(dev)->dsp_mutex)
 520 #define snd_hdac_dsp_lock(dev)          mutex_lock(&(dev)->dsp_mutex)
 521 #define snd_hdac_dsp_unlock(dev)        mutex_unlock(&(dev)->dsp_mutex)
 522 #define snd_hdac_stream_is_locked(dev)  ((dev)->locked)
 523 /* DSP loader helpers */
 524 int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
 525                          unsigned int byte_size, struct snd_dma_buffer *bufp);
 526 void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start);
 527 void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
 528                           struct snd_dma_buffer *dmab);
 529 #else /* CONFIG_SND_HDA_DSP_LOADER */
 530 #define snd_hdac_dsp_lock_init(dev)     do {} while (0)
 531 #define snd_hdac_dsp_lock(dev)          do {} while (0)
 532 #define snd_hdac_dsp_unlock(dev)        do {} while (0)
 533 #define snd_hdac_stream_is_locked(dev)  0
 534
 535 static inline int
 536 snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
 537                      unsigned int byte_size, struct snd_dma_buffer *bufp)
 538 {
 539         return 0;
 540 }
 541
 542 static inline void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
 543 {
 544 }
 545
 546 static inline void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
 547                                         struct snd_dma_buffer *dmab)
 548 {
 549 }
 550 #endif /* CONFIG_SND_HDA_DSP_LOADER */
 551
 552
 553 /*
 554  * generic array helpers
 555  */
 556 void *snd_array_new(struct snd_array *array);
 557 void snd_array_free(struct snd_array *array);
 558 static inline void snd_array_init(struct snd_array *array, unsigned int size,
 559                                   unsigned int align)
 560 {
 561         array->elem_size = size;
 562         array->alloc_align = align;
 563 }
 564
 565 static inline void *snd_array_elem(struct snd_array *array, unsigned int idx)
 566 {
 567         return array->list + idx * array->elem_size;
 568 }
 569
 570 static inline unsigned int snd_array_index(struct snd_array *array, void *ptr)
 571 {
 572         return (unsigned long)(ptr - array->list) / array->elem_size;
 573 }
 574
 575 #endif /* __SOUND_HDAUDIO_H */