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TOMOYO Linux Cross Reference
Linux/include/sound/hdaudio.h

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  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/pm_runtime.h>
 12 #include <linux/timecounter.h>
 13 #include <sound/core.h>
 14 #include <sound/pcm.h>
 15 #include <sound/memalloc.h>
 16 #include <sound/hda_verbs.h>
 17 #include <drm/i915_component.h>
 18 
 19 /* codec node id */
 20 typedef u16 hda_nid_t;
 21 
 22 struct hdac_bus;
 23 struct hdac_stream;
 24 struct hdac_device;
 25 struct hdac_driver;
 26 struct hdac_widget_tree;
 27 struct hda_device_id;
 28 
 29 /*
 30  * exported bus type
 31  */
 32 extern struct bus_type snd_hda_bus_type;
 33 
 34 /*
 35  * generic arrays
 36  */
 37 struct snd_array {
 38         unsigned int used;
 39         unsigned int alloced;
 40         unsigned int elem_size;
 41         unsigned int alloc_align;
 42         void *list;
 43 };
 44 
 45 /*
 46  * HD-audio codec base device
 47  */
 48 struct hdac_device {
 49         struct device dev;
 50         int type;
 51         struct hdac_bus *bus;
 52         unsigned int addr;              /* codec address */
 53         struct list_head list;          /* list point for bus codec_list */
 54 
 55         hda_nid_t afg;                  /* AFG node id */
 56         hda_nid_t mfg;                  /* MFG node id */
 57 
 58         /* ids */
 59         unsigned int vendor_id;
 60         unsigned int subsystem_id;
 61         unsigned int revision_id;
 62         unsigned int afg_function_id;
 63         unsigned int mfg_function_id;
 64         unsigned int afg_unsol:1;
 65         unsigned int mfg_unsol:1;
 66 
 67         unsigned int power_caps;        /* FG power caps */
 68 
 69         const char *vendor_name;        /* codec vendor name */
 70         const char *chip_name;          /* codec chip name */
 71 
 72         /* verb exec op override */
 73         int (*exec_verb)(struct hdac_device *dev, unsigned int cmd,
 74                          unsigned int flags, unsigned int *res);
 75 
 76         /* widgets */
 77         unsigned int num_nodes;
 78         hda_nid_t start_nid, end_nid;
 79 
 80         /* misc flags */
 81         atomic_t in_pm;         /* suspend/resume being performed */
 82 
 83         /* sysfs */
 84         struct hdac_widget_tree *widgets;
 85 
 86         /* regmap */
 87         struct regmap *regmap;
 88         struct snd_array vendor_verbs;
 89         bool lazy_cache:1;      /* don't wake up for writes */
 90         bool caps_overwriting:1; /* caps overwrite being in process */
 91         bool cache_coef:1;      /* cache COEF read/write too */
 92 };
 93 
 94 /* device/driver type used for matching */
 95 enum {
 96         HDA_DEV_CORE,
 97         HDA_DEV_LEGACY,
 98         HDA_DEV_ASOC,
 99 };
100 
101 enum {
102         SND_SKL_PCI_BIND_AUTO,  /* automatic selection based on pci class */
103         SND_SKL_PCI_BIND_LEGACY,/* bind only with legacy driver */
104         SND_SKL_PCI_BIND_ASOC   /* bind only with ASoC driver */
105 };
106 
107 /* direction */
108 enum {
109         HDA_INPUT, HDA_OUTPUT
110 };
111 
112 #define dev_to_hdac_dev(_dev)   container_of(_dev, struct hdac_device, dev)
113 
114 int snd_hdac_device_init(struct hdac_device *dev, struct hdac_bus *bus,
115                          const char *name, unsigned int addr);
116 void snd_hdac_device_exit(struct hdac_device *dev);
117 int snd_hdac_device_register(struct hdac_device *codec);
118 void snd_hdac_device_unregister(struct hdac_device *codec);
119 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name);
120 int snd_hdac_codec_modalias(struct hdac_device *hdac, char *buf, size_t size);
121 
122 int snd_hdac_refresh_widgets(struct hdac_device *codec, bool sysfs);
123 
124 unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
125                                unsigned int verb, unsigned int parm);
126 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
127                        unsigned int flags, unsigned int *res);
128 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
129                   unsigned int verb, unsigned int parm, unsigned int *res);
130 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
131                         unsigned int *res);
132 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
133                                 int parm);
134 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
135                            unsigned int parm, unsigned int val);
136 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
137                              hda_nid_t *conn_list, int max_conns);
138 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
139                            hda_nid_t *start_id);
140 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
141                                          unsigned int channels,
142                                          snd_pcm_format_t format,
143                                          unsigned int maxbps,
144                                          unsigned short spdif_ctls);
145 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
146                                 u32 *ratesp, u64 *formatsp, unsigned int *bpsp);
147 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
148                                   unsigned int format);
149 
150 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
151                         int flags, unsigned int verb, unsigned int parm);
152 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
153                         int flags, unsigned int verb, unsigned int parm);
154 bool snd_hdac_check_power_state(struct hdac_device *hdac,
155                 hda_nid_t nid, unsigned int target_state);
156 unsigned int snd_hdac_sync_power_state(struct hdac_device *hdac,
157                       hda_nid_t nid, unsigned int target_state);
158 /**
159  * snd_hdac_read_parm - read a codec parameter
160  * @codec: the codec object
161  * @nid: NID to read a parameter
162  * @parm: parameter to read
163  *
164  * Returns -1 for error.  If you need to distinguish the error more
165  * strictly, use _snd_hdac_read_parm() directly.
166  */
167 static inline int snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid,
168                                      int parm)
169 {
170         unsigned int val;
171 
172         return _snd_hdac_read_parm(codec, nid, parm, &val) < 0 ? -1 : val;
173 }
174 
175 #ifdef CONFIG_PM
176 int snd_hdac_power_up(struct hdac_device *codec);
177 int snd_hdac_power_down(struct hdac_device *codec);
178 int snd_hdac_power_up_pm(struct hdac_device *codec);
179 int snd_hdac_power_down_pm(struct hdac_device *codec);
180 int snd_hdac_keep_power_up(struct hdac_device *codec);
181 
182 /* call this at entering into suspend/resume callbacks in codec driver */
183 static inline void snd_hdac_enter_pm(struct hdac_device *codec)
184 {
185         atomic_inc(&codec->in_pm);
186 }
187 
188 /* call this at leaving from suspend/resume callbacks in codec driver */
189 static inline void snd_hdac_leave_pm(struct hdac_device *codec)
190 {
191         atomic_dec(&codec->in_pm);
192 }
193 
194 static inline bool snd_hdac_is_in_pm(struct hdac_device *codec)
195 {
196         return atomic_read(&codec->in_pm);
197 }
198 
199 static inline bool snd_hdac_is_power_on(struct hdac_device *codec)
200 {
201         return !pm_runtime_suspended(&codec->dev);
202 }
203 #else
204 static inline int snd_hdac_power_up(struct hdac_device *codec) { return 0; }
205 static inline int snd_hdac_power_down(struct hdac_device *codec) { return 0; }
206 static inline int snd_hdac_power_up_pm(struct hdac_device *codec) { return 0; }
207 static inline int snd_hdac_power_down_pm(struct hdac_device *codec) { return 0; }
208 static inline int snd_hdac_keep_power_up(struct hdac_device *codec) { return 0; }
209 static inline void snd_hdac_enter_pm(struct hdac_device *codec) {}
210 static inline void snd_hdac_leave_pm(struct hdac_device *codec) {}
211 static inline bool snd_hdac_is_in_pm(struct hdac_device *codec) { return 0; }
212 static inline bool snd_hdac_is_power_on(struct hdac_device *codec) { return 1; }
213 #endif
214 
215 /*
216  * HD-audio codec base driver
217  */
218 struct hdac_driver {
219         struct device_driver driver;
220         int type;
221         const struct hda_device_id *id_table;
222         int (*match)(struct hdac_device *dev, struct hdac_driver *drv);
223         void (*unsol_event)(struct hdac_device *dev, unsigned int event);
224 
225         /* fields used by ext bus APIs */
226         int (*probe)(struct hdac_device *dev);
227         int (*remove)(struct hdac_device *dev);
228         void (*shutdown)(struct hdac_device *dev);
229 };
230 
231 #define drv_to_hdac_driver(_drv) container_of(_drv, struct hdac_driver, driver)
232 
233 const struct hda_device_id *
234 hdac_get_device_id(struct hdac_device *hdev, struct hdac_driver *drv);
235 
236 /*
237  * Bus verb operators
238  */
239 struct hdac_bus_ops {
240         /* send a single command */
241         int (*command)(struct hdac_bus *bus, unsigned int cmd);
242         /* get a response from the last command */
243         int (*get_response)(struct hdac_bus *bus, unsigned int addr,
244                             unsigned int *res);
245 };
246 
247 /*
248  * ops used for ASoC HDA codec drivers
249  */
250 struct hdac_ext_bus_ops {
251         int (*hdev_attach)(struct hdac_device *hdev);
252         int (*hdev_detach)(struct hdac_device *hdev);
253 };
254 
255 /*
256  * Lowlevel I/O operators
257  */
258 struct hdac_io_ops {
259         /* mapped register accesses */
260         void (*reg_writel)(u32 value, u32 __iomem *addr);
261         u32 (*reg_readl)(u32 __iomem *addr);
262         void (*reg_writew)(u16 value, u16 __iomem *addr);
263         u16 (*reg_readw)(u16 __iomem *addr);
264         void (*reg_writeb)(u8 value, u8 __iomem *addr);
265         u8 (*reg_readb)(u8 __iomem *addr);
266         /* Allocation ops */
267         int (*dma_alloc_pages)(struct hdac_bus *bus, int type, size_t size,
268                                struct snd_dma_buffer *buf);
269         void (*dma_free_pages)(struct hdac_bus *bus,
270                                struct snd_dma_buffer *buf);
271 };
272 
273 #define HDA_UNSOL_QUEUE_SIZE    64
274 #define HDA_MAX_CODECS          8       /* limit by controller side */
275 
276 /*
277  * CORB/RIRB
278  *
279  * Each CORB entry is 4byte, RIRB is 8byte
280  */
281 struct hdac_rb {
282         __le32 *buf;            /* virtual address of CORB/RIRB buffer */
283         dma_addr_t addr;        /* physical address of CORB/RIRB buffer */
284         unsigned short rp, wp;  /* RIRB read/write pointers */
285         int cmds[HDA_MAX_CODECS];       /* number of pending requests */
286         u32 res[HDA_MAX_CODECS];        /* last read value */
287 };
288 
289 /*
290  * HD-audio bus base driver
291  *
292  * @ppcap: pp capabilities pointer
293  * @spbcap: SPIB capabilities pointer
294  * @mlcap: MultiLink capabilities pointer
295  * @gtscap: gts capabilities pointer
296  * @drsmcap: dma resume capabilities pointer
297  * @num_streams: streams supported
298  * @idx: HDA link index
299  * @hlink_list: link list of HDA links
300  * @lock: lock for link mgmt
301  * @cmd_dma_state: state of cmd DMAs: CORB and RIRB
302  */
303 struct hdac_bus {
304         struct device *dev;
305         const struct hdac_bus_ops *ops;
306         const struct hdac_io_ops *io_ops;
307         const struct hdac_ext_bus_ops *ext_ops;
308 
309         /* h/w resources */
310         unsigned long addr;
311         void __iomem *remap_addr;
312         int irq;
313 
314         void __iomem *ppcap;
315         void __iomem *spbcap;
316         void __iomem *mlcap;
317         void __iomem *gtscap;
318         void __iomem *drsmcap;
319 
320         /* codec linked list */
321         struct list_head codec_list;
322         unsigned int num_codecs;
323 
324         /* link caddr -> codec */
325         struct hdac_device *caddr_tbl[HDA_MAX_CODEC_ADDRESS + 1];
326 
327         /* unsolicited event queue */
328         u32 unsol_queue[HDA_UNSOL_QUEUE_SIZE * 2]; /* ring buffer */
329         unsigned int unsol_rp, unsol_wp;
330         struct work_struct unsol_work;
331 
332         /* bit flags of detected codecs */
333         unsigned long codec_mask;
334 
335         /* bit flags of powered codecs */
336         unsigned long codec_powered;
337 
338         /* CORB/RIRB */
339         struct hdac_rb corb;
340         struct hdac_rb rirb;
341         unsigned int last_cmd[HDA_MAX_CODECS];  /* last sent command */
342 
343         /* CORB/RIRB and position buffers */
344         struct snd_dma_buffer rb;
345         struct snd_dma_buffer posbuf;
346 
347         /* hdac_stream linked list */
348         struct list_head stream_list;
349 
350         /* operation state */
351         bool chip_init:1;               /* h/w initialized */
352 
353         /* behavior flags */
354         bool sync_write:1;              /* sync after verb write */
355         bool use_posbuf:1;              /* use position buffer */
356         bool snoop:1;                   /* enable snooping */
357         bool align_bdle_4k:1;           /* BDLE align 4K boundary */
358         bool reverse_assign:1;          /* assign devices in reverse order */
359         bool corbrp_self_clear:1;       /* CORBRP clears itself after reset */
360 
361         int bdl_pos_adj;                /* BDL position adjustment */
362 
363         /* locks */
364         spinlock_t reg_lock;
365         struct mutex cmd_mutex;
366 
367         /* DRM component interface */
368         struct drm_audio_component *audio_component;
369         long display_power_status;
370         bool display_power_active;
371 
372         /* parameters required for enhanced capabilities */
373         int num_streams;
374         int idx;
375 
376         struct list_head hlink_list;
377 
378         struct mutex lock;
379         bool cmd_dma_state;
380 
381 };
382 
383 int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
384                       const struct hdac_bus_ops *ops,
385                       const struct hdac_io_ops *io_ops);
386 void snd_hdac_bus_exit(struct hdac_bus *bus);
387 int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr,
388                            unsigned int cmd, unsigned int *res);
389 int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,
390                                     unsigned int cmd, unsigned int *res);
391 void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex);
392 
393 int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec);
394 void snd_hdac_bus_remove_device(struct hdac_bus *bus,
395                                 struct hdac_device *codec);
396 void snd_hdac_bus_process_unsol_events(struct work_struct *work);
397 
398 static inline void snd_hdac_codec_link_up(struct hdac_device *codec)
399 {
400         set_bit(codec->addr, &codec->bus->codec_powered);
401 }
402 
403 static inline void snd_hdac_codec_link_down(struct hdac_device *codec)
404 {
405         clear_bit(codec->addr, &codec->bus->codec_powered);
406 }
407 
408 int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val);
409 int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
410                               unsigned int *res);
411 int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus);
412 
413 bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset);
414 void snd_hdac_bus_stop_chip(struct hdac_bus *bus);
415 void snd_hdac_bus_init_cmd_io(struct hdac_bus *bus);
416 void snd_hdac_bus_stop_cmd_io(struct hdac_bus *bus);
417 void snd_hdac_bus_enter_link_reset(struct hdac_bus *bus);
418 void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus);
419 int snd_hdac_bus_reset_link(struct hdac_bus *bus, bool full_reset);
420 
421 void snd_hdac_bus_update_rirb(struct hdac_bus *bus);
422 int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
423                                     void (*ack)(struct hdac_bus *,
424                                                 struct hdac_stream *));
425 
426 int snd_hdac_bus_alloc_stream_pages(struct hdac_bus *bus);
427 void snd_hdac_bus_free_stream_pages(struct hdac_bus *bus);
428 
429 /*
430  * macros for easy use
431  */
432 #define _snd_hdac_chip_writeb(chip, reg, value) \
433         ((chip)->io_ops->reg_writeb(value, (chip)->remap_addr + (reg)))
434 #define _snd_hdac_chip_readb(chip, reg) \
435         ((chip)->io_ops->reg_readb((chip)->remap_addr + (reg)))
436 #define _snd_hdac_chip_writew(chip, reg, value) \
437         ((chip)->io_ops->reg_writew(value, (chip)->remap_addr + (reg)))
438 #define _snd_hdac_chip_readw(chip, reg) \
439         ((chip)->io_ops->reg_readw((chip)->remap_addr + (reg)))
440 #define _snd_hdac_chip_writel(chip, reg, value) \
441         ((chip)->io_ops->reg_writel(value, (chip)->remap_addr + (reg)))
442 #define _snd_hdac_chip_readl(chip, reg) \
443         ((chip)->io_ops->reg_readl((chip)->remap_addr + (reg)))
444 
445 /* read/write a register, pass without AZX_REG_ prefix */
446 #define snd_hdac_chip_writel(chip, reg, value) \
447         _snd_hdac_chip_writel(chip, AZX_REG_ ## reg, value)
448 #define snd_hdac_chip_writew(chip, reg, value) \
449         _snd_hdac_chip_writew(chip, AZX_REG_ ## reg, value)
450 #define snd_hdac_chip_writeb(chip, reg, value) \
451         _snd_hdac_chip_writeb(chip, AZX_REG_ ## reg, value)
452 #define snd_hdac_chip_readl(chip, reg) \
453         _snd_hdac_chip_readl(chip, AZX_REG_ ## reg)
454 #define snd_hdac_chip_readw(chip, reg) \
455         _snd_hdac_chip_readw(chip, AZX_REG_ ## reg)
456 #define snd_hdac_chip_readb(chip, reg) \
457         _snd_hdac_chip_readb(chip, AZX_REG_ ## reg)
458 
459 /* update a register, pass without AZX_REG_ prefix */
460 #define snd_hdac_chip_updatel(chip, reg, mask, val) \
461         snd_hdac_chip_writel(chip, reg, \
462                              (snd_hdac_chip_readl(chip, reg) & ~(mask)) | (val))
463 #define snd_hdac_chip_updatew(chip, reg, mask, val) \
464         snd_hdac_chip_writew(chip, reg, \
465                              (snd_hdac_chip_readw(chip, reg) & ~(mask)) | (val))
466 #define snd_hdac_chip_updateb(chip, reg, mask, val) \
467         snd_hdac_chip_writeb(chip, reg, \
468                              (snd_hdac_chip_readb(chip, reg) & ~(mask)) | (val))
469 
470 /*
471  * HD-audio stream
472  */
473 struct hdac_stream {
474         struct hdac_bus *bus;
475         struct snd_dma_buffer bdl; /* BDL buffer */
476         __le32 *posbuf;         /* position buffer pointer */
477         int direction;          /* playback / capture (SNDRV_PCM_STREAM_*) */
478 
479         unsigned int bufsize;   /* size of the play buffer in bytes */
480         unsigned int period_bytes; /* size of the period in bytes */
481         unsigned int frags;     /* number for period in the play buffer */
482         unsigned int fifo_size; /* FIFO size */
483 
484         void __iomem *sd_addr;  /* stream descriptor pointer */
485 
486         u32 sd_int_sta_mask;    /* stream int status mask */
487 
488         /* pcm support */
489         struct snd_pcm_substream *substream;    /* assigned substream,
490                                                  * set in PCM open
491                                                  */
492         unsigned int format_val;        /* format value to be set in the
493                                          * controller and the codec
494                                          */
495         unsigned char stream_tag;       /* assigned stream */
496         unsigned char index;            /* stream index */
497         int assigned_key;               /* last device# key assigned to */
498 
499         bool opened:1;
500         bool running:1;
501         bool prepared:1;
502         bool no_period_wakeup:1;
503         bool locked:1;
504 
505         /* timestamp */
506         unsigned long start_wallclk;    /* start + minimum wallclk */
507         unsigned long period_wallclk;   /* wallclk for period */
508         struct timecounter  tc;
509         struct cyclecounter cc;
510         int delay_negative_threshold;
511 
512         struct list_head list;
513 #ifdef CONFIG_SND_HDA_DSP_LOADER
514         /* DSP access mutex */
515         struct mutex dsp_mutex;
516 #endif
517 };
518 
519 void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
520                           int idx, int direction, int tag);
521 struct hdac_stream *snd_hdac_stream_assign(struct hdac_bus *bus,
522                                            struct snd_pcm_substream *substream);
523 void snd_hdac_stream_release(struct hdac_stream *azx_dev);
524 struct hdac_stream *snd_hdac_get_stream(struct hdac_bus *bus,
525                                         int dir, int stream_tag);
526 
527 int snd_hdac_stream_setup(struct hdac_stream *azx_dev);
528 void snd_hdac_stream_cleanup(struct hdac_stream *azx_dev);
529 int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev);
530 int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
531                                 unsigned int format_val);
532 void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start);
533 void snd_hdac_stream_clear(struct hdac_stream *azx_dev);
534 void snd_hdac_stream_stop(struct hdac_stream *azx_dev);
535 void snd_hdac_stream_reset(struct hdac_stream *azx_dev);
536 void snd_hdac_stream_sync_trigger(struct hdac_stream *azx_dev, bool set,
537                                   unsigned int streams, unsigned int reg);
538 void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
539                           unsigned int streams);
540 void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
541                                       unsigned int streams);
542 int snd_hdac_get_stream_stripe_ctl(struct hdac_bus *bus,
543                                 struct snd_pcm_substream *substream);
544 
545 /*
546  * macros for easy use
547  */
548 #define _snd_hdac_stream_write(type, dev, reg, value)                   \
549         ((dev)->bus->io_ops->reg_write ## type(value, (dev)->sd_addr + (reg)))
550 #define _snd_hdac_stream_read(type, dev, reg)                           \
551         ((dev)->bus->io_ops->reg_read ## type((dev)->sd_addr + (reg)))
552 
553 /* read/write a register, pass without AZX_REG_ prefix */
554 #define snd_hdac_stream_writel(dev, reg, value) \
555         _snd_hdac_stream_write(l, dev, AZX_REG_ ## reg, value)
556 #define snd_hdac_stream_writew(dev, reg, value) \
557         _snd_hdac_stream_write(w, dev, AZX_REG_ ## reg, value)
558 #define snd_hdac_stream_writeb(dev, reg, value) \
559         _snd_hdac_stream_write(b, dev, AZX_REG_ ## reg, value)
560 #define snd_hdac_stream_readl(dev, reg) \
561         _snd_hdac_stream_read(l, dev, AZX_REG_ ## reg)
562 #define snd_hdac_stream_readw(dev, reg) \
563         _snd_hdac_stream_read(w, dev, AZX_REG_ ## reg)
564 #define snd_hdac_stream_readb(dev, reg) \
565         _snd_hdac_stream_read(b, dev, AZX_REG_ ## reg)
566 
567 /* update a register, pass without AZX_REG_ prefix */
568 #define snd_hdac_stream_updatel(dev, reg, mask, val) \
569         snd_hdac_stream_writel(dev, reg, \
570                                (snd_hdac_stream_readl(dev, reg) & \
571                                 ~(mask)) | (val))
572 #define snd_hdac_stream_updatew(dev, reg, mask, val) \
573         snd_hdac_stream_writew(dev, reg, \
574                                (snd_hdac_stream_readw(dev, reg) & \
575                                 ~(mask)) | (val))
576 #define snd_hdac_stream_updateb(dev, reg, mask, val) \
577         snd_hdac_stream_writeb(dev, reg, \
578                                (snd_hdac_stream_readb(dev, reg) & \
579                                 ~(mask)) | (val))
580 
581 #ifdef CONFIG_SND_HDA_DSP_LOADER
582 /* DSP lock helpers */
583 #define snd_hdac_dsp_lock_init(dev)     mutex_init(&(dev)->dsp_mutex)
584 #define snd_hdac_dsp_lock(dev)          mutex_lock(&(dev)->dsp_mutex)
585 #define snd_hdac_dsp_unlock(dev)        mutex_unlock(&(dev)->dsp_mutex)
586 #define snd_hdac_stream_is_locked(dev)  ((dev)->locked)
587 /* DSP loader helpers */
588 int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
589                          unsigned int byte_size, struct snd_dma_buffer *bufp);
590 void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start);
591 void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
592                           struct snd_dma_buffer *dmab);
593 #else /* CONFIG_SND_HDA_DSP_LOADER */
594 #define snd_hdac_dsp_lock_init(dev)     do {} while (0)
595 #define snd_hdac_dsp_lock(dev)          do {} while (0)
596 #define snd_hdac_dsp_unlock(dev)        do {} while (0)
597 #define snd_hdac_stream_is_locked(dev)  0
598 
599 static inline int
600 snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
601                      unsigned int byte_size, struct snd_dma_buffer *bufp)
602 {
603         return 0;
604 }
605 
606 static inline void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
607 {
608 }
609 
610 static inline void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
611                                         struct snd_dma_buffer *dmab)
612 {
613 }
614 #endif /* CONFIG_SND_HDA_DSP_LOADER */
615 
616 
617 /*
618  * generic array helpers
619  */
620 void *snd_array_new(struct snd_array *array);
621 void snd_array_free(struct snd_array *array);
622 static inline void snd_array_init(struct snd_array *array, unsigned int size,
623                                   unsigned int align)
624 {
625         array->elem_size = size;
626         array->alloc_align = align;
627 }
628 
629 static inline void *snd_array_elem(struct snd_array *array, unsigned int idx)
630 {
631         return array->list + idx * array->elem_size;
632 }
633 
634 static inline unsigned int snd_array_index(struct snd_array *array, void *ptr)
635 {
636         return (unsigned long)(ptr - array->list) / array->elem_size;
637 }
638 
639 /* a helper macro to iterate for each snd_array element */
640 #define snd_array_for_each(array, idx, ptr) \
641         for ((idx) = 0, (ptr) = (array)->list; (idx) < (array)->used; \
642              (ptr) = snd_array_elem(array, ++(idx)))
643 
644 #endif /* __SOUND_HDAUDIO_H */
645 

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