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);
 116 int snd_hdac_refresh_widget_sysfs(struct hdac_device *codec);
 117
 118 unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
 119                                unsigned int verb, unsigned int parm);
 120 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
 121                        unsigned int flags, unsigned int *res);
 122 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
 123                   unsigned int verb, unsigned int parm, unsigned int *res);
 124 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
 125                         unsigned int *res);
 126 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
 127                                 int parm);
 128 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
 129                            unsigned int parm, unsigned int val);
 130 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
 131                              hda_nid_t *conn_list, int max_conns);
 132 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
 133                            hda_nid_t *start_id);
 134 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
 135                                          unsigned int channels,
 136                                          unsigned int format,
 137                                          unsigned int maxbps,
 138                                          unsigned short spdif_ctls);
 139 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
 140                                 u32 *ratesp, u64 *formatsp, unsigned int *bpsp);
 141 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
 142                                   unsigned int format);
 143
 144 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
 145                         int flags, unsigned int verb, unsigned int parm);
 146 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
 147                         int flags, unsigned int verb, unsigned int parm);
 148 bool snd_hdac_check_power_state(struct hdac_device *hdac,
 149                 hda_nid_t nid, unsigned int target_state);
 150 /**
 151  * snd_hdac_read_parm - read a codec parameter
 152  * @codec: the codec object
 153  * @nid: NID to read a parameter
 154  * @parm: parameter to read
 155  *
 156  * Returns -1 for error.  If you need to distinguish the error more
 157  * strictly, use _snd_hdac_read_parm() directly.
 158  */
 159 static inline int snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid,
 160                                      int parm)
 161 {
 162         unsigned int val;
 163
 164         return _snd_hdac_read_parm(codec, nid, parm, &val) < 0 ? -1 : val;
 165 }
 166
 167 #ifdef CONFIG_PM
 168 int snd_hdac_power_up(struct hdac_device *codec);
 169 int snd_hdac_power_down(struct hdac_device *codec);
 170 int snd_hdac_power_up_pm(struct hdac_device *codec);
 171 int snd_hdac_power_down_pm(struct hdac_device *codec);
 172 int snd_hdac_keep_power_up(struct hdac_device *codec);
 173 #else
 174 static inline int snd_hdac_power_up(struct hdac_device *codec) { return 0; }
 175 static inline int snd_hdac_power_down(struct hdac_device *codec) { return 0; }
 176 static inline int snd_hdac_power_up_pm(struct hdac_device *codec) { return 0; }
 177 static inline int snd_hdac_power_down_pm(struct hdac_device *codec) { return 0; }
 178 static inline int snd_hdac_keep_power_up(struct hdac_device *codec) { return 0; }
 179 #endif
 180
 181 /*
 182  * HD-audio codec base driver
 183  */
 184 struct hdac_driver {
 185         struct device_driver driver;
 186         int type;
 187         const struct hda_device_id *id_table;
 188         int (*match)(struct hdac_device *dev, struct hdac_driver *drv);
 189         void (*unsol_event)(struct hdac_device *dev, unsigned int event);
 190 };
 191
 192 #define drv_to_hdac_driver(_drv) container_of(_drv, struct hdac_driver, driver)
 193
 194 const struct hda_device_id *
 195 hdac_get_device_id(struct hdac_device *hdev, struct hdac_driver *drv);
 196
 197 /*
 198  * Bus verb operators
 199  */
 200 struct hdac_bus_ops {
 201         /* send a single command */
 202         int (*command)(struct hdac_bus *bus, unsigned int cmd);
 203         /* get a response from the last command */
 204         int (*get_response)(struct hdac_bus *bus, unsigned int addr,
 205                             unsigned int *res);
 206         /* control the link power  */
 207         int (*link_power)(struct hdac_bus *bus, bool enable);
 208 };
 209
 210 /*
 211  * Lowlevel I/O operators
 212  */
 213 struct hdac_io_ops {
 214         /* mapped register accesses */
 215         void (*reg_writel)(u32 value, u32 __iomem *addr);
 216         u32 (*reg_readl)(u32 __iomem *addr);
 217         void (*reg_writew)(u16 value, u16 __iomem *addr);
 218         u16 (*reg_readw)(u16 __iomem *addr);
 219         void (*reg_writeb)(u8 value, u8 __iomem *addr);
 220         u8 (*reg_readb)(u8 __iomem *addr);
 221         /* Allocation ops */
 222         int (*dma_alloc_pages)(struct hdac_bus *bus, int type, size_t size,
 223                                struct snd_dma_buffer *buf);
 224         void (*dma_free_pages)(struct hdac_bus *bus,
 225                                struct snd_dma_buffer *buf);
 226 };
 227
 228 #define HDA_UNSOL_QUEUE_SIZE    64
 229 #define HDA_MAX_CODECS          8       /* limit by controller side */
 230
 231 /* HD Audio class code */
 232 #define PCI_CLASS_MULTIMEDIA_HD_AUDIO   0x0403
 233
 234 /*
 235  * CORB/RIRB
 236  *
 237  * Each CORB entry is 4byte, RIRB is 8byte
 238  */
 239 struct hdac_rb {
 240         __le32 *buf;            /* virtual address of CORB/RIRB buffer */
 241         dma_addr_t addr;        /* physical address of CORB/RIRB buffer */
 242         unsigned short rp, wp;  /* RIRB read/write pointers */
 243         int cmds[HDA_MAX_CODECS];       /* number of pending requests */
 244         u32 res[HDA_MAX_CODECS];        /* last read value */
 245 };
 246
 247 /*
 248  * HD-audio bus base driver
 249  *
 250  * @ppcap: pp capabilities pointer
 251  * @spbcap: SPIB capabilities pointer
 252  * @mlcap: MultiLink capabilities pointer
 253  * @gtscap: gts capabilities pointer
 254  * @drsmcap: dma resume capabilities pointer
 255  */
 256 struct hdac_bus {
 257         struct device *dev;
 258         const struct hdac_bus_ops *ops;
 259         const struct hdac_io_ops *io_ops;
 260
 261         /* h/w resources */
 262         unsigned long addr;
 263         void __iomem *remap_addr;
 264         int irq;
 265
 266         void __iomem *ppcap;
 267         void __iomem *spbcap;
 268         void __iomem *mlcap;
 269         void __iomem *gtscap;
 270         void __iomem *drsmcap;
 271
 272         /* codec linked list */
 273         struct list_head codec_list;
 274         unsigned int num_codecs;
 275
 276         /* link caddr -> codec */
 277         struct hdac_device *caddr_tbl[HDA_MAX_CODEC_ADDRESS + 1];
 278
 279         /* unsolicited event queue */
 280         u32 unsol_queue[HDA_UNSOL_QUEUE_SIZE * 2]; /* ring buffer */
 281         unsigned int unsol_rp, unsol_wp;
 282         struct work_struct unsol_work;
 283
 284         /* bit flags of detected codecs */
 285         unsigned long codec_mask;
 286
 287         /* bit flags of powered codecs */
 288         unsigned long codec_powered;
 289
 290         /* CORB/RIRB */
 291         struct hdac_rb corb;
 292         struct hdac_rb rirb;
 293         unsigned int last_cmd[HDA_MAX_CODECS];  /* last sent command */
 294
 295         /* CORB/RIRB and position buffers */
 296         struct snd_dma_buffer rb;
 297         struct snd_dma_buffer posbuf;
 298
 299         /* hdac_stream linked list */
 300         struct list_head stream_list;
 301
 302         /* operation state */
 303         bool chip_init:1;               /* h/w initialized */
 304
 305         /* behavior flags */
 306         bool sync_write:1;              /* sync after verb write */
 307         bool use_posbuf:1;              /* use position buffer */
 308         bool snoop:1;                   /* enable snooping */
 309         bool align_bdle_4k:1;           /* BDLE align 4K boundary */
 310         bool reverse_assign:1;          /* assign devices in reverse order */
 311         bool corbrp_self_clear:1;       /* CORBRP clears itself after reset */
 312
 313         int bdl_pos_adj;                /* BDL position adjustment */
 314
 315         /* locks */
 316         spinlock_t reg_lock;
 317         struct mutex cmd_mutex;
 318
 319         /* i915 component interface */
 320         struct i915_audio_component *audio_component;
 321         int i915_power_refcount;
 322 };
 323
 324 int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
 325                       const struct hdac_bus_ops *ops,
 326                       const struct hdac_io_ops *io_ops);
 327 void snd_hdac_bus_exit(struct hdac_bus *bus);
 328 int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr,
 329                            unsigned int cmd, unsigned int *res);
 330 int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,
 331                                     unsigned int cmd, unsigned int *res);
 332 void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex);
 333
 334 int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec);
 335 void snd_hdac_bus_remove_device(struct hdac_bus *bus,
 336                                 struct hdac_device *codec);
 337
 338 static inline void snd_hdac_codec_link_up(struct hdac_device *codec)
 339 {
 340         set_bit(codec->addr, &codec->bus->codec_powered);
 341 }
 342
 343 static inline void snd_hdac_codec_link_down(struct hdac_device *codec)
 344 {
 345         clear_bit(codec->addr, &codec->bus->codec_powered);
 346 }
 347
 348 int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val);
 349 int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
 350                               unsigned int *res);
 351 int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus);
 352 int snd_hdac_link_power(struct hdac_device *codec, bool enable);
 353
 354 bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset);
 355 void snd_hdac_bus_stop_chip(struct hdac_bus *bus);
 356 void snd_hdac_bus_init_cmd_io(struct hdac_bus *bus);
 357 void snd_hdac_bus_stop_cmd_io(struct hdac_bus *bus);
 358 void snd_hdac_bus_enter_link_reset(struct hdac_bus *bus);
 359 void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus);
 360
 361 void snd_hdac_bus_update_rirb(struct hdac_bus *bus);
 362 int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
 363                                     void (*ack)(struct hdac_bus *,
 364                                                 struct hdac_stream *));
 365
 366 int snd_hdac_bus_alloc_stream_pages(struct hdac_bus *bus);
 367 void snd_hdac_bus_free_stream_pages(struct hdac_bus *bus);
 368
 369 /*
 370  * macros for easy use
 371  */
 372 #define _snd_hdac_chip_writeb(chip, reg, value) \
 373         ((chip)->io_ops->reg_writeb(value, (chip)->remap_addr + (reg)))
 374 #define _snd_hdac_chip_readb(chip, reg) \
 375         ((chip)->io_ops->reg_readb((chip)->remap_addr + (reg)))
 376 #define _snd_hdac_chip_writew(chip, reg, value) \
 377         ((chip)->io_ops->reg_writew(value, (chip)->remap_addr + (reg)))
 378 #define _snd_hdac_chip_readw(chip, reg) \
 379         ((chip)->io_ops->reg_readw((chip)->remap_addr + (reg)))
 380 #define _snd_hdac_chip_writel(chip, reg, value) \
 381         ((chip)->io_ops->reg_writel(value, (chip)->remap_addr + (reg)))
 382 #define _snd_hdac_chip_readl(chip, reg) \
 383         ((chip)->io_ops->reg_readl((chip)->remap_addr + (reg)))
 384
 385 /* read/write a register, pass without AZX_REG_ prefix */
 386 #define snd_hdac_chip_writel(chip, reg, value) \
 387         _snd_hdac_chip_writel(chip, AZX_REG_ ## reg, value)
 388 #define snd_hdac_chip_writew(chip, reg, value) \
 389         _snd_hdac_chip_writew(chip, AZX_REG_ ## reg, value)
 390 #define snd_hdac_chip_writeb(chip, reg, value) \
 391         _snd_hdac_chip_writeb(chip, AZX_REG_ ## reg, value)
 392 #define snd_hdac_chip_readl(chip, reg) \
 393         _snd_hdac_chip_readl(chip, AZX_REG_ ## reg)
 394 #define snd_hdac_chip_readw(chip, reg) \
 395         _snd_hdac_chip_readw(chip, AZX_REG_ ## reg)
 396 #define snd_hdac_chip_readb(chip, reg) \
 397         _snd_hdac_chip_readb(chip, AZX_REG_ ## reg)
 398
 399 /* update a register, pass without AZX_REG_ prefix */
 400 #define snd_hdac_chip_updatel(chip, reg, mask, val) \
 401         snd_hdac_chip_writel(chip, reg, \
 402                              (snd_hdac_chip_readl(chip, reg) & ~(mask)) | (val))
 403 #define snd_hdac_chip_updatew(chip, reg, mask, val) \
 404         snd_hdac_chip_writew(chip, reg, \
 405                              (snd_hdac_chip_readw(chip, reg) & ~(mask)) | (val))
 406 #define snd_hdac_chip_updateb(chip, reg, mask, val) \
 407         snd_hdac_chip_writeb(chip, reg, \
 408                              (snd_hdac_chip_readb(chip, reg) & ~(mask)) | (val))
 409
 410 /*
 411  * HD-audio stream
 412  */
 413 struct hdac_stream {
 414         struct hdac_bus *bus;
 415         struct snd_dma_buffer bdl; /* BDL buffer */
 416         __le32 *posbuf;         /* position buffer pointer */
 417         int direction;          /* playback / capture (SNDRV_PCM_STREAM_*) */
 418
 419         unsigned int bufsize;   /* size of the play buffer in bytes */
 420         unsigned int period_bytes; /* size of the period in bytes */
 421         unsigned int frags;     /* number for period in the play buffer */
 422         unsigned int fifo_size; /* FIFO size */
 423
 424         void __iomem *sd_addr;  /* stream descriptor pointer */
 425
 426         u32 sd_int_sta_mask;    /* stream int status mask */
 427
 428         /* pcm support */
 429         struct snd_pcm_substream *substream;    /* assigned substream,
 430                                                  * set in PCM open
 431                                                  */
 432         unsigned int format_val;        /* format value to be set in the
 433                                          * controller and the codec
 434                                          */
 435         unsigned char stream_tag;       /* assigned stream */
 436         unsigned char index;            /* stream index */
 437         int assigned_key;               /* last device# key assigned to */
 438
 439         bool opened:1;
 440         bool running:1;
 441         bool prepared:1;
 442         bool no_period_wakeup:1;
 443         bool locked:1;
 444
 445         /* timestamp */
 446         unsigned long start_wallclk;    /* start + minimum wallclk */
 447         unsigned long period_wallclk;   /* wallclk for period */
 448         struct timecounter  tc;
 449         struct cyclecounter cc;
 450         int delay_negative_threshold;
 451
 452         struct list_head list;
 453 #ifdef CONFIG_SND_HDA_DSP_LOADER
 454         /* DSP access mutex */
 455         struct mutex dsp_mutex;
 456 #endif
 457 };
 458
 459 void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
 460                           int idx, int direction, int tag);
 461 struct hdac_stream *snd_hdac_stream_assign(struct hdac_bus *bus,
 462                                            struct snd_pcm_substream *substream);
 463 void snd_hdac_stream_release(struct hdac_stream *azx_dev);
 464 struct hdac_stream *snd_hdac_get_stream(struct hdac_bus *bus,
 465                                         int dir, int stream_tag);
 466
 467 int snd_hdac_stream_setup(struct hdac_stream *azx_dev);
 468 void snd_hdac_stream_cleanup(struct hdac_stream *azx_dev);
 469 int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev);
 470 int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
 471                                 unsigned int format_val);
 472 void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start);
 473 void snd_hdac_stream_clear(struct hdac_stream *azx_dev);
 474 void snd_hdac_stream_stop(struct hdac_stream *azx_dev);
 475 void snd_hdac_stream_reset(struct hdac_stream *azx_dev);
 476 void snd_hdac_stream_sync_trigger(struct hdac_stream *azx_dev, bool set,
 477                                   unsigned int streams, unsigned int reg);
 478 void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
 479                           unsigned int streams);
 480 void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
 481                                       unsigned int streams);
 482 /*
 483  * macros for easy use
 484  */
 485 #define _snd_hdac_stream_write(type, dev, reg, value)                   \
 486         ((dev)->bus->io_ops->reg_write ## type(value, (dev)->sd_addr + (reg)))
 487 #define _snd_hdac_stream_read(type, dev, reg)                           \
 488         ((dev)->bus->io_ops->reg_read ## type((dev)->sd_addr + (reg)))
 489
 490 /* read/write a register, pass without AZX_REG_ prefix */
 491 #define snd_hdac_stream_writel(dev, reg, value) \
 492         _snd_hdac_stream_write(l, dev, AZX_REG_ ## reg, value)
 493 #define snd_hdac_stream_writew(dev, reg, value) \
 494         _snd_hdac_stream_write(w, dev, AZX_REG_ ## reg, value)
 495 #define snd_hdac_stream_writeb(dev, reg, value) \
 496         _snd_hdac_stream_write(b, dev, AZX_REG_ ## reg, value)
 497 #define snd_hdac_stream_readl(dev, reg) \
 498         _snd_hdac_stream_read(l, dev, AZX_REG_ ## reg)
 499 #define snd_hdac_stream_readw(dev, reg) \
 500         _snd_hdac_stream_read(w, dev, AZX_REG_ ## reg)
 501 #define snd_hdac_stream_readb(dev, reg) \
 502         _snd_hdac_stream_read(b, dev, AZX_REG_ ## reg)
 503
 504 /* update a register, pass without AZX_REG_ prefix */
 505 #define snd_hdac_stream_updatel(dev, reg, mask, val) \
 506         snd_hdac_stream_writel(dev, reg, \
 507                                (snd_hdac_stream_readl(dev, reg) & \
 508                                 ~(mask)) | (val))
 509 #define snd_hdac_stream_updatew(dev, reg, mask, val) \
 510         snd_hdac_stream_writew(dev, reg, \
 511                                (snd_hdac_stream_readw(dev, reg) & \
 512                                 ~(mask)) | (val))
 513 #define snd_hdac_stream_updateb(dev, reg, mask, val) \
 514         snd_hdac_stream_writeb(dev, reg, \
 515                                (snd_hdac_stream_readb(dev, reg) & \
 516                                 ~(mask)) | (val))
 517
 518 #ifdef CONFIG_SND_HDA_DSP_LOADER
 519 /* DSP lock helpers */
 520 #define snd_hdac_dsp_lock_init(dev)     mutex_init(&(dev)->dsp_mutex)
 521 #define snd_hdac_dsp_lock(dev)          mutex_lock(&(dev)->dsp_mutex)
 522 #define snd_hdac_dsp_unlock(dev)        mutex_unlock(&(dev)->dsp_mutex)
 523 #define snd_hdac_stream_is_locked(dev)  ((dev)->locked)
 524 /* DSP loader helpers */
 525 int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
 526                          unsigned int byte_size, struct snd_dma_buffer *bufp);
 527 void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start);
 528 void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
 529                           struct snd_dma_buffer *dmab);
 530 #else /* CONFIG_SND_HDA_DSP_LOADER */
 531 #define snd_hdac_dsp_lock_init(dev)     do {} while (0)
 532 #define snd_hdac_dsp_lock(dev)          do {} while (0)
 533 #define snd_hdac_dsp_unlock(dev)        do {} while (0)
 534 #define snd_hdac_stream_is_locked(dev)  0
 535
 536 static inline int
 537 snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
 538                      unsigned int byte_size, struct snd_dma_buffer *bufp)
 539 {
 540         return 0;
 541 }
 542
 543 static inline void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
 544 {
 545 }
 546
 547 static inline void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
 548                                         struct snd_dma_buffer *dmab)
 549 {
 550 }
 551 #endif /* CONFIG_SND_HDA_DSP_LOADER */
 552
 553
 554 /*
 555  * generic array helpers
 556  */
 557 void *snd_array_new(struct snd_array *array);
 558 void snd_array_free(struct snd_array *array);
 559 static inline void snd_array_init(struct snd_array *array, unsigned int size,
 560                                   unsigned int align)
 561 {
 562         array->elem_size = size;
 563         array->alloc_align = align;
 564 }
 565
 566 static inline void *snd_array_elem(struct snd_array *array, unsigned int idx)
 567 {
 568         return array->list + idx * array->elem_size;
 569 }
 570
 571 static inline unsigned int snd_array_index(struct snd_array *array, void *ptr)
 572 {
 573         return (unsigned long)(ptr - array->list) / array->elem_size;
 574 }
 575
 576 #endif /* __SOUND_HDAUDIO_H */