tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 */
20typedef u16 hda_nid_t;
21
22struct hdac_bus;
23struct hdac_stream;
24struct hdac_device;
25struct hdac_driver;
26struct hdac_widget_tree;
27struct hda_device_id;
28
29/*
30 * exported bus type
31 */
32extern struct bus_type snd_hda_bus_type;
33
34/*
35 * generic arrays
36 */
37struct 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 */
48struct 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 */
95enum {
96 HDA_DEV_CORE,
97 HDA_DEV_LEGACY,
98 HDA_DEV_ASOC,
99};
100
101enum {
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 */
108enum {
109 HDA_INPUT, HDA_OUTPUT
110};
111
112#define dev_to_hdac_dev(_dev) container_of(_dev, struct hdac_device, dev)
113
114int snd_hdac_device_init(struct hdac_device *dev, struct hdac_bus *bus,
115 const char *name, unsigned int addr);
116void snd_hdac_device_exit(struct hdac_device *dev);
117int snd_hdac_device_register(struct hdac_device *codec);
118void snd_hdac_device_unregister(struct hdac_device *codec);
119int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name);
120int snd_hdac_codec_modalias(struct hdac_device *hdac, char *buf, size_t size);
121
122int snd_hdac_refresh_widgets(struct hdac_device *codec, bool sysfs);
123
124unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
125 unsigned int verb, unsigned int parm);
126int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
127 unsigned int flags, unsigned int *res);
128int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
129 unsigned int verb, unsigned int parm, unsigned int *res);
130int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
131 unsigned int *res);
132int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
133 int parm);
134int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
135 unsigned int parm, unsigned int val);
136int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
137 hda_nid_t *conn_list, int max_conns);
138int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
139 hda_nid_t *start_id);
140unsigned 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);
145int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
146 u32 *ratesp, u64 *formatsp, unsigned int *bpsp);
147bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
148 unsigned int format);
149
150int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
151 int flags, unsigned int verb, unsigned int parm);
152int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
153 int flags, unsigned int verb, unsigned int parm);
154bool snd_hdac_check_power_state(struct hdac_device *hdac,
155 hda_nid_t nid, unsigned int target_state);
156unsigned 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 */
167static 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
176int snd_hdac_power_up(struct hdac_device *codec);
177int snd_hdac_power_down(struct hdac_device *codec);
178int snd_hdac_power_up_pm(struct hdac_device *codec);
179int snd_hdac_power_down_pm(struct hdac_device *codec);
180int snd_hdac_keep_power_up(struct hdac_device *codec);
181
182/* call this at entering into suspend/resume callbacks in codec driver */
183static 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 */
189static inline void snd_hdac_leave_pm(struct hdac_device *codec)
190{
191 atomic_dec(&codec->in_pm);
192}
193
194static inline bool snd_hdac_is_in_pm(struct hdac_device *codec)
195{
196 return atomic_read(&codec->in_pm);
197}
198
199static inline bool snd_hdac_is_power_on(struct hdac_device *codec)
200{
201 return !pm_runtime_suspended(&codec->dev);
202}
203#else
204static inline int snd_hdac_power_up(struct hdac_device *codec) { return 0; }
205static inline int snd_hdac_power_down(struct hdac_device *codec) { return 0; }
206static inline int snd_hdac_power_up_pm(struct hdac_device *codec) { return 0; }
207static inline int snd_hdac_power_down_pm(struct hdac_device *codec) { return 0; }
208static inline int snd_hdac_keep_power_up(struct hdac_device *codec) { return 0; }
209static inline void snd_hdac_enter_pm(struct hdac_device *codec) {}
210static inline void snd_hdac_leave_pm(struct hdac_device *codec) {}
211static inline bool snd_hdac_is_in_pm(struct hdac_device *codec) { return 0; }
212static inline bool snd_hdac_is_power_on(struct hdac_device *codec) { return 1; }
213#endif
214
215/*
216 * HD-audio codec base driver
217 */
218struct 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
233const struct hda_device_id *
234hdac_get_device_id(struct hdac_device *hdev, struct hdac_driver *drv);
235
236/*
237 * Bus verb operators
238 */
239struct 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 */
250struct 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 */
258struct 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 */
281struct 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 */
303struct 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
383int 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);
386void snd_hdac_bus_exit(struct hdac_bus *bus);
387int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr,
388 unsigned int cmd, unsigned int *res);
389int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,
390 unsigned int cmd, unsigned int *res);
391void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex);
392
393int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec);
394void snd_hdac_bus_remove_device(struct hdac_bus *bus,
395 struct hdac_device *codec);
396void snd_hdac_bus_process_unsol_events(struct work_struct *work);
397
398static inline void snd_hdac_codec_link_up(struct hdac_device *codec)
399{
400 set_bit(codec->addr, &codec->bus->codec_powered);
401}
402
403static inline void snd_hdac_codec_link_down(struct hdac_device *codec)
404{
405 clear_bit(codec->addr, &codec->bus->codec_powered);
406}
407
408int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val);
409int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
410 unsigned int *res);
411int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus);
412
413bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset);
414void snd_hdac_bus_stop_chip(struct hdac_bus *bus);
415void snd_hdac_bus_init_cmd_io(struct hdac_bus *bus);
416void snd_hdac_bus_stop_cmd_io(struct hdac_bus *bus);
417void snd_hdac_bus_enter_link_reset(struct hdac_bus *bus);
418void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus);
419int snd_hdac_bus_reset_link(struct hdac_bus *bus, bool full_reset);
420
421void snd_hdac_bus_update_rirb(struct hdac_bus *bus);
422int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
423 void (*ack)(struct hdac_bus *,
424 struct hdac_stream *));
425
426int snd_hdac_bus_alloc_stream_pages(struct hdac_bus *bus);
427void 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 */
473struct 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
519void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
520 int idx, int direction, int tag);
521struct hdac_stream *snd_hdac_stream_assign(struct hdac_bus *bus,
522 struct snd_pcm_substream *substream);
523void snd_hdac_stream_release(struct hdac_stream *azx_dev);
524struct hdac_stream *snd_hdac_get_stream(struct hdac_bus *bus,
525 int dir, int stream_tag);
526
527int snd_hdac_stream_setup(struct hdac_stream *azx_dev);
528void snd_hdac_stream_cleanup(struct hdac_stream *azx_dev);
529int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev);
530int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
531 unsigned int format_val);
532void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start);
533void snd_hdac_stream_clear(struct hdac_stream *azx_dev);
534void snd_hdac_stream_stop(struct hdac_stream *azx_dev);
535void snd_hdac_stream_reset(struct hdac_stream *azx_dev);
536void snd_hdac_stream_sync_trigger(struct hdac_stream *azx_dev, bool set,
537 unsigned int streams, unsigned int reg);
538void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
539 unsigned int streams);
540void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
541 unsigned int streams);
542/*
543 * macros for easy use
544 */
545#define _snd_hdac_stream_write(type, dev, reg, value) \
546 ((dev)->bus->io_ops->reg_write ## type(value, (dev)->sd_addr + (reg)))
547#define _snd_hdac_stream_read(type, dev, reg) \
548 ((dev)->bus->io_ops->reg_read ## type((dev)->sd_addr + (reg)))
549
550/* read/write a register, pass without AZX_REG_ prefix */
551#define snd_hdac_stream_writel(dev, reg, value) \
552 _snd_hdac_stream_write(l, dev, AZX_REG_ ## reg, value)
553#define snd_hdac_stream_writew(dev, reg, value) \
554 _snd_hdac_stream_write(w, dev, AZX_REG_ ## reg, value)
555#define snd_hdac_stream_writeb(dev, reg, value) \
556 _snd_hdac_stream_write(b, dev, AZX_REG_ ## reg, value)
557#define snd_hdac_stream_readl(dev, reg) \
558 _snd_hdac_stream_read(l, dev, AZX_REG_ ## reg)
559#define snd_hdac_stream_readw(dev, reg) \
560 _snd_hdac_stream_read(w, dev, AZX_REG_ ## reg)
561#define snd_hdac_stream_readb(dev, reg) \
562 _snd_hdac_stream_read(b, dev, AZX_REG_ ## reg)
563
564/* update a register, pass without AZX_REG_ prefix */
565#define snd_hdac_stream_updatel(dev, reg, mask, val) \
566 snd_hdac_stream_writel(dev, reg, \
567 (snd_hdac_stream_readl(dev, reg) & \
568 ~(mask)) | (val))
569#define snd_hdac_stream_updatew(dev, reg, mask, val) \
570 snd_hdac_stream_writew(dev, reg, \
571 (snd_hdac_stream_readw(dev, reg) & \
572 ~(mask)) | (val))
573#define snd_hdac_stream_updateb(dev, reg, mask, val) \
574 snd_hdac_stream_writeb(dev, reg, \
575 (snd_hdac_stream_readb(dev, reg) & \
576 ~(mask)) | (val))
577
578#ifdef CONFIG_SND_HDA_DSP_LOADER
579/* DSP lock helpers */
580#define snd_hdac_dsp_lock_init(dev) mutex_init(&(dev)->dsp_mutex)
581#define snd_hdac_dsp_lock(dev) mutex_lock(&(dev)->dsp_mutex)
582#define snd_hdac_dsp_unlock(dev) mutex_unlock(&(dev)->dsp_mutex)
583#define snd_hdac_stream_is_locked(dev) ((dev)->locked)
584/* DSP loader helpers */
585int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
586 unsigned int byte_size, struct snd_dma_buffer *bufp);
587void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start);
588void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
589 struct snd_dma_buffer *dmab);
590#else /* CONFIG_SND_HDA_DSP_LOADER */
591#define snd_hdac_dsp_lock_init(dev) do {} while (0)
592#define snd_hdac_dsp_lock(dev) do {} while (0)
593#define snd_hdac_dsp_unlock(dev) do {} while (0)
594#define snd_hdac_stream_is_locked(dev) 0
595
596static inline int
597snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
598 unsigned int byte_size, struct snd_dma_buffer *bufp)
599{
600 return 0;
601}
602
603static inline void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
604{
605}
606
607static inline void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
608 struct snd_dma_buffer *dmab)
609{
610}
611#endif /* CONFIG_SND_HDA_DSP_LOADER */
612
613
614/*
615 * generic array helpers
616 */
617void *snd_array_new(struct snd_array *array);
618void snd_array_free(struct snd_array *array);
619static inline void snd_array_init(struct snd_array *array, unsigned int size,
620 unsigned int align)
621{
622 array->elem_size = size;
623 array->alloc_align = align;
624}
625
626static inline void *snd_array_elem(struct snd_array *array, unsigned int idx)
627{
628 return array->list + idx * array->elem_size;
629}
630
631static inline unsigned int snd_array_index(struct snd_array *array, void *ptr)
632{
633 return (unsigned long)(ptr - array->list) / array->elem_size;
634}
635
636/* a helper macro to iterate for each snd_array element */
637#define snd_array_for_each(array, idx, ptr) \
638 for ((idx) = 0, (ptr) = (array)->list; (idx) < (array)->used; \
639 (ptr) = snd_array_elem(array, ++(idx)))
640
641#endif /* __SOUND_HDAUDIO_H */