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 */
snd_hdac_read_parm(struct hdac_device * codec,hda_nid_t nid,int parm)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
snd_hdac_power_up(struct hdac_device * codec)174 static inline int snd_hdac_power_up(struct hdac_device *codec) { return 0; }
snd_hdac_power_down(struct hdac_device * codec)175 static inline int snd_hdac_power_down(struct hdac_device *codec) { return 0; }
snd_hdac_power_up_pm(struct hdac_device * codec)176 static inline int snd_hdac_power_up_pm(struct hdac_device *codec) { return 0; }
snd_hdac_power_down_pm(struct hdac_device * codec)177 static inline int snd_hdac_power_down_pm(struct hdac_device *codec) { return 0; }
snd_hdac_keep_power_up(struct hdac_device * codec)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
snd_hdac_codec_link_up(struct hdac_device * codec)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
snd_hdac_codec_link_down(struct hdac_device * codec)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 int snd_hdac_bus_reset_link(struct hdac_bus *bus, bool full_reset);
361
362 void snd_hdac_bus_update_rirb(struct hdac_bus *bus);
363 int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
364 void (*ack)(struct hdac_bus *,
365 struct hdac_stream *));
366
367 int snd_hdac_bus_alloc_stream_pages(struct hdac_bus *bus);
368 void snd_hdac_bus_free_stream_pages(struct hdac_bus *bus);
369
370 /*
371 * macros for easy use
372 */
373 #define _snd_hdac_chip_writeb(chip, reg, value) \
374 ((chip)->io_ops->reg_writeb(value, (chip)->remap_addr + (reg)))
375 #define _snd_hdac_chip_readb(chip, reg) \
376 ((chip)->io_ops->reg_readb((chip)->remap_addr + (reg)))
377 #define _snd_hdac_chip_writew(chip, reg, value) \
378 ((chip)->io_ops->reg_writew(value, (chip)->remap_addr + (reg)))
379 #define _snd_hdac_chip_readw(chip, reg) \
380 ((chip)->io_ops->reg_readw((chip)->remap_addr + (reg)))
381 #define _snd_hdac_chip_writel(chip, reg, value) \
382 ((chip)->io_ops->reg_writel(value, (chip)->remap_addr + (reg)))
383 #define _snd_hdac_chip_readl(chip, reg) \
384 ((chip)->io_ops->reg_readl((chip)->remap_addr + (reg)))
385
386 /* read/write a register, pass without AZX_REG_ prefix */
387 #define snd_hdac_chip_writel(chip, reg, value) \
388 _snd_hdac_chip_writel(chip, AZX_REG_ ## reg, value)
389 #define snd_hdac_chip_writew(chip, reg, value) \
390 _snd_hdac_chip_writew(chip, AZX_REG_ ## reg, value)
391 #define snd_hdac_chip_writeb(chip, reg, value) \
392 _snd_hdac_chip_writeb(chip, AZX_REG_ ## reg, value)
393 #define snd_hdac_chip_readl(chip, reg) \
394 _snd_hdac_chip_readl(chip, AZX_REG_ ## reg)
395 #define snd_hdac_chip_readw(chip, reg) \
396 _snd_hdac_chip_readw(chip, AZX_REG_ ## reg)
397 #define snd_hdac_chip_readb(chip, reg) \
398 _snd_hdac_chip_readb(chip, AZX_REG_ ## reg)
399
400 /* update a register, pass without AZX_REG_ prefix */
401 #define snd_hdac_chip_updatel(chip, reg, mask, val) \
402 snd_hdac_chip_writel(chip, reg, \
403 (snd_hdac_chip_readl(chip, reg) & ~(mask)) | (val))
404 #define snd_hdac_chip_updatew(chip, reg, mask, val) \
405 snd_hdac_chip_writew(chip, reg, \
406 (snd_hdac_chip_readw(chip, reg) & ~(mask)) | (val))
407 #define snd_hdac_chip_updateb(chip, reg, mask, val) \
408 snd_hdac_chip_writeb(chip, reg, \
409 (snd_hdac_chip_readb(chip, reg) & ~(mask)) | (val))
410
411 /*
412 * HD-audio stream
413 */
414 struct hdac_stream {
415 struct hdac_bus *bus;
416 struct snd_dma_buffer bdl; /* BDL buffer */
417 __le32 *posbuf; /* position buffer pointer */
418 int direction; /* playback / capture (SNDRV_PCM_STREAM_*) */
419
420 unsigned int bufsize; /* size of the play buffer in bytes */
421 unsigned int period_bytes; /* size of the period in bytes */
422 unsigned int frags; /* number for period in the play buffer */
423 unsigned int fifo_size; /* FIFO size */
424
425 void __iomem *sd_addr; /* stream descriptor pointer */
426
427 u32 sd_int_sta_mask; /* stream int status mask */
428
429 /* pcm support */
430 struct snd_pcm_substream *substream; /* assigned substream,
431 * set in PCM open
432 */
433 unsigned int format_val; /* format value to be set in the
434 * controller and the codec
435 */
436 unsigned char stream_tag; /* assigned stream */
437 unsigned char index; /* stream index */
438 int assigned_key; /* last device# key assigned to */
439
440 bool opened:1;
441 bool running:1;
442 bool prepared:1;
443 bool no_period_wakeup:1;
444 bool locked:1;
445
446 /* timestamp */
447 unsigned long start_wallclk; /* start + minimum wallclk */
448 unsigned long period_wallclk; /* wallclk for period */
449 struct timecounter tc;
450 struct cyclecounter cc;
451 int delay_negative_threshold;
452
453 struct list_head list;
454 #ifdef CONFIG_SND_HDA_DSP_LOADER
455 /* DSP access mutex */
456 struct mutex dsp_mutex;
457 #endif
458 };
459
460 void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
461 int idx, int direction, int tag);
462 struct hdac_stream *snd_hdac_stream_assign(struct hdac_bus *bus,
463 struct snd_pcm_substream *substream);
464 void snd_hdac_stream_release(struct hdac_stream *azx_dev);
465 struct hdac_stream *snd_hdac_get_stream(struct hdac_bus *bus,
466 int dir, int stream_tag);
467
468 int snd_hdac_stream_setup(struct hdac_stream *azx_dev);
469 void snd_hdac_stream_cleanup(struct hdac_stream *azx_dev);
470 int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev);
471 int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
472 unsigned int format_val);
473 void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start);
474 void snd_hdac_stream_clear(struct hdac_stream *azx_dev);
475 void snd_hdac_stream_stop(struct hdac_stream *azx_dev);
476 void snd_hdac_stream_reset(struct hdac_stream *azx_dev);
477 void snd_hdac_stream_sync_trigger(struct hdac_stream *azx_dev, bool set,
478 unsigned int streams, unsigned int reg);
479 void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
480 unsigned int streams);
481 void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
482 unsigned int streams);
483 /*
484 * macros for easy use
485 */
486 #define _snd_hdac_stream_write(type, dev, reg, value) \
487 ((dev)->bus->io_ops->reg_write ## type(value, (dev)->sd_addr + (reg)))
488 #define _snd_hdac_stream_read(type, dev, reg) \
489 ((dev)->bus->io_ops->reg_read ## type((dev)->sd_addr + (reg)))
490
491 /* read/write a register, pass without AZX_REG_ prefix */
492 #define snd_hdac_stream_writel(dev, reg, value) \
493 _snd_hdac_stream_write(l, dev, AZX_REG_ ## reg, value)
494 #define snd_hdac_stream_writew(dev, reg, value) \
495 _snd_hdac_stream_write(w, dev, AZX_REG_ ## reg, value)
496 #define snd_hdac_stream_writeb(dev, reg, value) \
497 _snd_hdac_stream_write(b, dev, AZX_REG_ ## reg, value)
498 #define snd_hdac_stream_readl(dev, reg) \
499 _snd_hdac_stream_read(l, dev, AZX_REG_ ## reg)
500 #define snd_hdac_stream_readw(dev, reg) \
501 _snd_hdac_stream_read(w, dev, AZX_REG_ ## reg)
502 #define snd_hdac_stream_readb(dev, reg) \
503 _snd_hdac_stream_read(b, dev, AZX_REG_ ## reg)
504
505 /* update a register, pass without AZX_REG_ prefix */
506 #define snd_hdac_stream_updatel(dev, reg, mask, val) \
507 snd_hdac_stream_writel(dev, reg, \
508 (snd_hdac_stream_readl(dev, reg) & \
509 ~(mask)) | (val))
510 #define snd_hdac_stream_updatew(dev, reg, mask, val) \
511 snd_hdac_stream_writew(dev, reg, \
512 (snd_hdac_stream_readw(dev, reg) & \
513 ~(mask)) | (val))
514 #define snd_hdac_stream_updateb(dev, reg, mask, val) \
515 snd_hdac_stream_writeb(dev, reg, \
516 (snd_hdac_stream_readb(dev, reg) & \
517 ~(mask)) | (val))
518
519 #ifdef CONFIG_SND_HDA_DSP_LOADER
520 /* DSP lock helpers */
521 #define snd_hdac_dsp_lock_init(dev) mutex_init(&(dev)->dsp_mutex)
522 #define snd_hdac_dsp_lock(dev) mutex_lock(&(dev)->dsp_mutex)
523 #define snd_hdac_dsp_unlock(dev) mutex_unlock(&(dev)->dsp_mutex)
524 #define snd_hdac_stream_is_locked(dev) ((dev)->locked)
525 /* DSP loader helpers */
526 int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
527 unsigned int byte_size, struct snd_dma_buffer *bufp);
528 void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start);
529 void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
530 struct snd_dma_buffer *dmab);
531 #else /* CONFIG_SND_HDA_DSP_LOADER */
532 #define snd_hdac_dsp_lock_init(dev) do {} while (0)
533 #define snd_hdac_dsp_lock(dev) do {} while (0)
534 #define snd_hdac_dsp_unlock(dev) do {} while (0)
535 #define snd_hdac_stream_is_locked(dev) 0
536
537 static inline int
snd_hdac_dsp_prepare(struct hdac_stream * azx_dev,unsigned int format,unsigned int byte_size,struct snd_dma_buffer * bufp)538 snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
539 unsigned int byte_size, struct snd_dma_buffer *bufp)
540 {
541 return 0;
542 }
543
snd_hdac_dsp_trigger(struct hdac_stream * azx_dev,bool start)544 static inline void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
545 {
546 }
547
snd_hdac_dsp_cleanup(struct hdac_stream * azx_dev,struct snd_dma_buffer * dmab)548 static inline void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
549 struct snd_dma_buffer *dmab)
550 {
551 }
552 #endif /* CONFIG_SND_HDA_DSP_LOADER */
553
554
555 /*
556 * generic array helpers
557 */
558 void *snd_array_new(struct snd_array *array);
559 void snd_array_free(struct snd_array *array);
snd_array_init(struct snd_array * array,unsigned int size,unsigned int align)560 static inline void snd_array_init(struct snd_array *array, unsigned int size,
561 unsigned int align)
562 {
563 array->elem_size = size;
564 array->alloc_align = align;
565 }
566
snd_array_elem(struct snd_array * array,unsigned int idx)567 static inline void *snd_array_elem(struct snd_array *array, unsigned int idx)
568 {
569 return array->list + idx * array->elem_size;
570 }
571
snd_array_index(struct snd_array * array,void * ptr)572 static inline unsigned int snd_array_index(struct snd_array *array, void *ptr)
573 {
574 return (unsigned long)(ptr - array->list) / array->elem_size;
575 }
576
577 #endif /* __SOUND_HDAUDIO_H */
578