xref: /openbmc/linux/include/sound/hdaudio.h (revision f220d3eb)
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 	bool  link_power_control:1;
83 
84 	/* sysfs */
85 	struct hdac_widget_tree *widgets;
86 
87 	/* regmap */
88 	struct regmap *regmap;
89 	struct snd_array vendor_verbs;
90 	bool lazy_cache:1;	/* don't wake up for writes */
91 	bool caps_overwriting:1; /* caps overwrite being in process */
92 	bool cache_coef:1;	/* cache COEF read/write too */
93 };
94 
95 /* device/driver type used for matching */
96 enum {
97 	HDA_DEV_CORE,
98 	HDA_DEV_LEGACY,
99 	HDA_DEV_ASOC,
100 };
101 
102 /* direction */
103 enum {
104 	HDA_INPUT, HDA_OUTPUT
105 };
106 
107 #define dev_to_hdac_dev(_dev)	container_of(_dev, struct hdac_device, dev)
108 
109 int snd_hdac_device_init(struct hdac_device *dev, struct hdac_bus *bus,
110 			 const char *name, unsigned int addr);
111 void snd_hdac_device_exit(struct hdac_device *dev);
112 int snd_hdac_device_register(struct hdac_device *codec);
113 void snd_hdac_device_unregister(struct hdac_device *codec);
114 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name);
115 int snd_hdac_codec_modalias(struct hdac_device *hdac, char *buf, size_t size);
116 
117 int snd_hdac_refresh_widgets(struct hdac_device *codec, bool sysfs);
118 
119 unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
120 			       unsigned int verb, unsigned int parm);
121 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
122 		       unsigned int flags, unsigned int *res);
123 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
124 		  unsigned int verb, unsigned int parm, unsigned int *res);
125 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
126 			unsigned int *res);
127 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
128 				int parm);
129 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
130 			   unsigned int parm, unsigned int val);
131 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
132 			     hda_nid_t *conn_list, int max_conns);
133 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
134 			   hda_nid_t *start_id);
135 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
136 					 unsigned int channels,
137 					 snd_pcm_format_t format,
138 					 unsigned int maxbps,
139 					 unsigned short spdif_ctls);
140 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
141 				u32 *ratesp, u64 *formatsp, unsigned int *bpsp);
142 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
143 				  unsigned int format);
144 
145 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
146 			int flags, unsigned int verb, unsigned int parm);
147 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
148 			int flags, unsigned int verb, unsigned int parm);
149 bool snd_hdac_check_power_state(struct hdac_device *hdac,
150 		hda_nid_t nid, unsigned int target_state);
151 unsigned int snd_hdac_sync_power_state(struct hdac_device *hdac,
152 		      hda_nid_t nid, unsigned int target_state);
153 /**
154  * snd_hdac_read_parm - read a codec parameter
155  * @codec: the codec object
156  * @nid: NID to read a parameter
157  * @parm: parameter to read
158  *
159  * Returns -1 for error.  If you need to distinguish the error more
160  * strictly, use _snd_hdac_read_parm() directly.
161  */
162 static inline int snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid,
163 				     int parm)
164 {
165 	unsigned int val;
166 
167 	return _snd_hdac_read_parm(codec, nid, parm, &val) < 0 ? -1 : val;
168 }
169 
170 #ifdef CONFIG_PM
171 int snd_hdac_power_up(struct hdac_device *codec);
172 int snd_hdac_power_down(struct hdac_device *codec);
173 int snd_hdac_power_up_pm(struct hdac_device *codec);
174 int snd_hdac_power_down_pm(struct hdac_device *codec);
175 int snd_hdac_keep_power_up(struct hdac_device *codec);
176 
177 /* call this at entering into suspend/resume callbacks in codec driver */
178 static inline void snd_hdac_enter_pm(struct hdac_device *codec)
179 {
180 	atomic_inc(&codec->in_pm);
181 }
182 
183 /* call this at leaving from suspend/resume callbacks in codec driver */
184 static inline void snd_hdac_leave_pm(struct hdac_device *codec)
185 {
186 	atomic_dec(&codec->in_pm);
187 }
188 
189 static inline bool snd_hdac_is_in_pm(struct hdac_device *codec)
190 {
191 	return atomic_read(&codec->in_pm);
192 }
193 
194 static inline bool snd_hdac_is_power_on(struct hdac_device *codec)
195 {
196 	return !pm_runtime_suspended(&codec->dev);
197 }
198 #else
199 static inline int snd_hdac_power_up(struct hdac_device *codec) { return 0; }
200 static inline int snd_hdac_power_down(struct hdac_device *codec) { return 0; }
201 static inline int snd_hdac_power_up_pm(struct hdac_device *codec) { return 0; }
202 static inline int snd_hdac_power_down_pm(struct hdac_device *codec) { return 0; }
203 static inline int snd_hdac_keep_power_up(struct hdac_device *codec) { return 0; }
204 static inline void snd_hdac_enter_pm(struct hdac_device *codec) {}
205 static inline void snd_hdac_leave_pm(struct hdac_device *codec) {}
206 static inline bool snd_hdac_is_in_pm(struct hdac_device *codec) { return 0; }
207 static inline bool snd_hdac_is_power_on(struct hdac_device *codec) { return 1; }
208 #endif
209 
210 /*
211  * HD-audio codec base driver
212  */
213 struct hdac_driver {
214 	struct device_driver driver;
215 	int type;
216 	const struct hda_device_id *id_table;
217 	int (*match)(struct hdac_device *dev, struct hdac_driver *drv);
218 	void (*unsol_event)(struct hdac_device *dev, unsigned int event);
219 
220 	/* fields used by ext bus APIs */
221 	int (*probe)(struct hdac_device *dev);
222 	int (*remove)(struct hdac_device *dev);
223 	void (*shutdown)(struct hdac_device *dev);
224 };
225 
226 #define drv_to_hdac_driver(_drv) container_of(_drv, struct hdac_driver, driver)
227 
228 const struct hda_device_id *
229 hdac_get_device_id(struct hdac_device *hdev, struct hdac_driver *drv);
230 
231 /*
232  * Bus verb operators
233  */
234 struct hdac_bus_ops {
235 	/* send a single command */
236 	int (*command)(struct hdac_bus *bus, unsigned int cmd);
237 	/* get a response from the last command */
238 	int (*get_response)(struct hdac_bus *bus, unsigned int addr,
239 			    unsigned int *res);
240 	/* control the link power  */
241 	int (*link_power)(struct hdac_bus *bus, bool enable);
242 };
243 
244 /*
245  * ops used for ASoC HDA codec drivers
246  */
247 struct hdac_ext_bus_ops {
248 	int (*hdev_attach)(struct hdac_device *hdev);
249 	int (*hdev_detach)(struct hdac_device *hdev);
250 };
251 
252 /*
253  * Lowlevel I/O operators
254  */
255 struct hdac_io_ops {
256 	/* mapped register accesses */
257 	void (*reg_writel)(u32 value, u32 __iomem *addr);
258 	u32 (*reg_readl)(u32 __iomem *addr);
259 	void (*reg_writew)(u16 value, u16 __iomem *addr);
260 	u16 (*reg_readw)(u16 __iomem *addr);
261 	void (*reg_writeb)(u8 value, u8 __iomem *addr);
262 	u8 (*reg_readb)(u8 __iomem *addr);
263 	/* Allocation ops */
264 	int (*dma_alloc_pages)(struct hdac_bus *bus, int type, size_t size,
265 			       struct snd_dma_buffer *buf);
266 	void (*dma_free_pages)(struct hdac_bus *bus,
267 			       struct snd_dma_buffer *buf);
268 };
269 
270 #define HDA_UNSOL_QUEUE_SIZE	64
271 #define HDA_MAX_CODECS		8	/* limit by controller side */
272 
273 /*
274  * CORB/RIRB
275  *
276  * Each CORB entry is 4byte, RIRB is 8byte
277  */
278 struct hdac_rb {
279 	__le32 *buf;		/* virtual address of CORB/RIRB buffer */
280 	dma_addr_t addr;	/* physical address of CORB/RIRB buffer */
281 	unsigned short rp, wp;	/* RIRB read/write pointers */
282 	int cmds[HDA_MAX_CODECS];	/* number of pending requests */
283 	u32 res[HDA_MAX_CODECS];	/* last read value */
284 };
285 
286 /*
287  * HD-audio bus base driver
288  *
289  * @ppcap: pp capabilities pointer
290  * @spbcap: SPIB capabilities pointer
291  * @mlcap: MultiLink capabilities pointer
292  * @gtscap: gts capabilities pointer
293  * @drsmcap: dma resume capabilities pointer
294  * @num_streams: streams supported
295  * @idx: HDA link index
296  * @hlink_list: link list of HDA links
297  * @lock: lock for link mgmt
298  * @cmd_dma_state: state of cmd DMAs: CORB and RIRB
299  */
300 struct hdac_bus {
301 	struct device *dev;
302 	const struct hdac_bus_ops *ops;
303 	const struct hdac_io_ops *io_ops;
304 	const struct hdac_ext_bus_ops *ext_ops;
305 
306 	/* h/w resources */
307 	unsigned long addr;
308 	void __iomem *remap_addr;
309 	int irq;
310 
311 	void __iomem *ppcap;
312 	void __iomem *spbcap;
313 	void __iomem *mlcap;
314 	void __iomem *gtscap;
315 	void __iomem *drsmcap;
316 
317 	/* codec linked list */
318 	struct list_head codec_list;
319 	unsigned int num_codecs;
320 
321 	/* link caddr -> codec */
322 	struct hdac_device *caddr_tbl[HDA_MAX_CODEC_ADDRESS + 1];
323 
324 	/* unsolicited event queue */
325 	u32 unsol_queue[HDA_UNSOL_QUEUE_SIZE * 2]; /* ring buffer */
326 	unsigned int unsol_rp, unsol_wp;
327 	struct work_struct unsol_work;
328 
329 	/* bit flags of detected codecs */
330 	unsigned long codec_mask;
331 
332 	/* bit flags of powered codecs */
333 	unsigned long codec_powered;
334 
335 	/* CORB/RIRB */
336 	struct hdac_rb corb;
337 	struct hdac_rb rirb;
338 	unsigned int last_cmd[HDA_MAX_CODECS];	/* last sent command */
339 
340 	/* CORB/RIRB and position buffers */
341 	struct snd_dma_buffer rb;
342 	struct snd_dma_buffer posbuf;
343 
344 	/* hdac_stream linked list */
345 	struct list_head stream_list;
346 
347 	/* operation state */
348 	bool chip_init:1;		/* h/w initialized */
349 
350 	/* behavior flags */
351 	bool sync_write:1;		/* sync after verb write */
352 	bool use_posbuf:1;		/* use position buffer */
353 	bool snoop:1;			/* enable snooping */
354 	bool align_bdle_4k:1;		/* BDLE align 4K boundary */
355 	bool reverse_assign:1;		/* assign devices in reverse order */
356 	bool corbrp_self_clear:1;	/* CORBRP clears itself after reset */
357 
358 	int bdl_pos_adj;		/* BDL position adjustment */
359 
360 	/* locks */
361 	spinlock_t reg_lock;
362 	struct mutex cmd_mutex;
363 
364 	/* DRM component interface */
365 	struct drm_audio_component *audio_component;
366 	int drm_power_refcount;
367 
368 	/* parameters required for enhanced capabilities */
369 	int num_streams;
370 	int idx;
371 
372 	struct list_head hlink_list;
373 
374 	struct mutex lock;
375 	bool cmd_dma_state;
376 
377 };
378 
379 int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
380 		      const struct hdac_bus_ops *ops,
381 		      const struct hdac_io_ops *io_ops);
382 void snd_hdac_bus_exit(struct hdac_bus *bus);
383 int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr,
384 			   unsigned int cmd, unsigned int *res);
385 int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,
386 				    unsigned int cmd, unsigned int *res);
387 void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex);
388 
389 int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec);
390 void snd_hdac_bus_remove_device(struct hdac_bus *bus,
391 				struct hdac_device *codec);
392 
393 static inline void snd_hdac_codec_link_up(struct hdac_device *codec)
394 {
395 	set_bit(codec->addr, &codec->bus->codec_powered);
396 }
397 
398 static inline void snd_hdac_codec_link_down(struct hdac_device *codec)
399 {
400 	clear_bit(codec->addr, &codec->bus->codec_powered);
401 }
402 
403 int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val);
404 int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
405 			      unsigned int *res);
406 int snd_hdac_bus_parse_capabilities(struct hdac_bus *bus);
407 int snd_hdac_link_power(struct hdac_device *codec, bool enable);
408 
409 bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset);
410 void snd_hdac_bus_stop_chip(struct hdac_bus *bus);
411 void snd_hdac_bus_init_cmd_io(struct hdac_bus *bus);
412 void snd_hdac_bus_stop_cmd_io(struct hdac_bus *bus);
413 void snd_hdac_bus_enter_link_reset(struct hdac_bus *bus);
414 void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus);
415 
416 void snd_hdac_bus_update_rirb(struct hdac_bus *bus);
417 int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
418 				    void (*ack)(struct hdac_bus *,
419 						struct hdac_stream *));
420 
421 int snd_hdac_bus_alloc_stream_pages(struct hdac_bus *bus);
422 void snd_hdac_bus_free_stream_pages(struct hdac_bus *bus);
423 
424 /*
425  * macros for easy use
426  */
427 #define _snd_hdac_chip_writeb(chip, reg, value) \
428 	((chip)->io_ops->reg_writeb(value, (chip)->remap_addr + (reg)))
429 #define _snd_hdac_chip_readb(chip, reg) \
430 	((chip)->io_ops->reg_readb((chip)->remap_addr + (reg)))
431 #define _snd_hdac_chip_writew(chip, reg, value) \
432 	((chip)->io_ops->reg_writew(value, (chip)->remap_addr + (reg)))
433 #define _snd_hdac_chip_readw(chip, reg) \
434 	((chip)->io_ops->reg_readw((chip)->remap_addr + (reg)))
435 #define _snd_hdac_chip_writel(chip, reg, value) \
436 	((chip)->io_ops->reg_writel(value, (chip)->remap_addr + (reg)))
437 #define _snd_hdac_chip_readl(chip, reg) \
438 	((chip)->io_ops->reg_readl((chip)->remap_addr + (reg)))
439 
440 /* read/write a register, pass without AZX_REG_ prefix */
441 #define snd_hdac_chip_writel(chip, reg, value) \
442 	_snd_hdac_chip_writel(chip, AZX_REG_ ## reg, value)
443 #define snd_hdac_chip_writew(chip, reg, value) \
444 	_snd_hdac_chip_writew(chip, AZX_REG_ ## reg, value)
445 #define snd_hdac_chip_writeb(chip, reg, value) \
446 	_snd_hdac_chip_writeb(chip, AZX_REG_ ## reg, value)
447 #define snd_hdac_chip_readl(chip, reg) \
448 	_snd_hdac_chip_readl(chip, AZX_REG_ ## reg)
449 #define snd_hdac_chip_readw(chip, reg) \
450 	_snd_hdac_chip_readw(chip, AZX_REG_ ## reg)
451 #define snd_hdac_chip_readb(chip, reg) \
452 	_snd_hdac_chip_readb(chip, AZX_REG_ ## reg)
453 
454 /* update a register, pass without AZX_REG_ prefix */
455 #define snd_hdac_chip_updatel(chip, reg, mask, val) \
456 	snd_hdac_chip_writel(chip, reg, \
457 			     (snd_hdac_chip_readl(chip, reg) & ~(mask)) | (val))
458 #define snd_hdac_chip_updatew(chip, reg, mask, val) \
459 	snd_hdac_chip_writew(chip, reg, \
460 			     (snd_hdac_chip_readw(chip, reg) & ~(mask)) | (val))
461 #define snd_hdac_chip_updateb(chip, reg, mask, val) \
462 	snd_hdac_chip_writeb(chip, reg, \
463 			     (snd_hdac_chip_readb(chip, reg) & ~(mask)) | (val))
464 
465 /*
466  * HD-audio stream
467  */
468 struct hdac_stream {
469 	struct hdac_bus *bus;
470 	struct snd_dma_buffer bdl; /* BDL buffer */
471 	__le32 *posbuf;		/* position buffer pointer */
472 	int direction;		/* playback / capture (SNDRV_PCM_STREAM_*) */
473 
474 	unsigned int bufsize;	/* size of the play buffer in bytes */
475 	unsigned int period_bytes; /* size of the period in bytes */
476 	unsigned int frags;	/* number for period in the play buffer */
477 	unsigned int fifo_size;	/* FIFO size */
478 
479 	void __iomem *sd_addr;	/* stream descriptor pointer */
480 
481 	u32 sd_int_sta_mask;	/* stream int status mask */
482 
483 	/* pcm support */
484 	struct snd_pcm_substream *substream;	/* assigned substream,
485 						 * set in PCM open
486 						 */
487 	unsigned int format_val;	/* format value to be set in the
488 					 * controller and the codec
489 					 */
490 	unsigned char stream_tag;	/* assigned stream */
491 	unsigned char index;		/* stream index */
492 	int assigned_key;		/* last device# key assigned to */
493 
494 	bool opened:1;
495 	bool running:1;
496 	bool prepared:1;
497 	bool no_period_wakeup:1;
498 	bool locked:1;
499 
500 	/* timestamp */
501 	unsigned long start_wallclk;	/* start + minimum wallclk */
502 	unsigned long period_wallclk;	/* wallclk for period */
503 	struct timecounter  tc;
504 	struct cyclecounter cc;
505 	int delay_negative_threshold;
506 
507 	struct list_head list;
508 #ifdef CONFIG_SND_HDA_DSP_LOADER
509 	/* DSP access mutex */
510 	struct mutex dsp_mutex;
511 #endif
512 };
513 
514 void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
515 			  int idx, int direction, int tag);
516 struct hdac_stream *snd_hdac_stream_assign(struct hdac_bus *bus,
517 					   struct snd_pcm_substream *substream);
518 void snd_hdac_stream_release(struct hdac_stream *azx_dev);
519 struct hdac_stream *snd_hdac_get_stream(struct hdac_bus *bus,
520 					int dir, int stream_tag);
521 
522 int snd_hdac_stream_setup(struct hdac_stream *azx_dev);
523 void snd_hdac_stream_cleanup(struct hdac_stream *azx_dev);
524 int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev);
525 int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
526 				unsigned int format_val);
527 void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start);
528 void snd_hdac_stream_clear(struct hdac_stream *azx_dev);
529 void snd_hdac_stream_stop(struct hdac_stream *azx_dev);
530 void snd_hdac_stream_reset(struct hdac_stream *azx_dev);
531 void snd_hdac_stream_sync_trigger(struct hdac_stream *azx_dev, bool set,
532 				  unsigned int streams, unsigned int reg);
533 void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
534 			  unsigned int streams);
535 void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
536 				      unsigned int streams);
537 /*
538  * macros for easy use
539  */
540 #define _snd_hdac_stream_write(type, dev, reg, value)			\
541 	((dev)->bus->io_ops->reg_write ## type(value, (dev)->sd_addr + (reg)))
542 #define _snd_hdac_stream_read(type, dev, reg)				\
543 	((dev)->bus->io_ops->reg_read ## type((dev)->sd_addr + (reg)))
544 
545 /* read/write a register, pass without AZX_REG_ prefix */
546 #define snd_hdac_stream_writel(dev, reg, value) \
547 	_snd_hdac_stream_write(l, dev, AZX_REG_ ## reg, value)
548 #define snd_hdac_stream_writew(dev, reg, value) \
549 	_snd_hdac_stream_write(w, dev, AZX_REG_ ## reg, value)
550 #define snd_hdac_stream_writeb(dev, reg, value) \
551 	_snd_hdac_stream_write(b, dev, AZX_REG_ ## reg, value)
552 #define snd_hdac_stream_readl(dev, reg) \
553 	_snd_hdac_stream_read(l, dev, AZX_REG_ ## reg)
554 #define snd_hdac_stream_readw(dev, reg) \
555 	_snd_hdac_stream_read(w, dev, AZX_REG_ ## reg)
556 #define snd_hdac_stream_readb(dev, reg) \
557 	_snd_hdac_stream_read(b, dev, AZX_REG_ ## reg)
558 
559 /* update a register, pass without AZX_REG_ prefix */
560 #define snd_hdac_stream_updatel(dev, reg, mask, val) \
561 	snd_hdac_stream_writel(dev, reg, \
562 			       (snd_hdac_stream_readl(dev, reg) & \
563 				~(mask)) | (val))
564 #define snd_hdac_stream_updatew(dev, reg, mask, val) \
565 	snd_hdac_stream_writew(dev, reg, \
566 			       (snd_hdac_stream_readw(dev, reg) & \
567 				~(mask)) | (val))
568 #define snd_hdac_stream_updateb(dev, reg, mask, val) \
569 	snd_hdac_stream_writeb(dev, reg, \
570 			       (snd_hdac_stream_readb(dev, reg) & \
571 				~(mask)) | (val))
572 
573 #ifdef CONFIG_SND_HDA_DSP_LOADER
574 /* DSP lock helpers */
575 #define snd_hdac_dsp_lock_init(dev)	mutex_init(&(dev)->dsp_mutex)
576 #define snd_hdac_dsp_lock(dev)		mutex_lock(&(dev)->dsp_mutex)
577 #define snd_hdac_dsp_unlock(dev)	mutex_unlock(&(dev)->dsp_mutex)
578 #define snd_hdac_stream_is_locked(dev)	((dev)->locked)
579 /* DSP loader helpers */
580 int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
581 			 unsigned int byte_size, struct snd_dma_buffer *bufp);
582 void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start);
583 void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
584 			  struct snd_dma_buffer *dmab);
585 #else /* CONFIG_SND_HDA_DSP_LOADER */
586 #define snd_hdac_dsp_lock_init(dev)	do {} while (0)
587 #define snd_hdac_dsp_lock(dev)		do {} while (0)
588 #define snd_hdac_dsp_unlock(dev)	do {} while (0)
589 #define snd_hdac_stream_is_locked(dev)	0
590 
591 static inline int
592 snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
593 		     unsigned int byte_size, struct snd_dma_buffer *bufp)
594 {
595 	return 0;
596 }
597 
598 static inline void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
599 {
600 }
601 
602 static inline void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
603 					struct snd_dma_buffer *dmab)
604 {
605 }
606 #endif /* CONFIG_SND_HDA_DSP_LOADER */
607 
608 
609 /*
610  * generic array helpers
611  */
612 void *snd_array_new(struct snd_array *array);
613 void snd_array_free(struct snd_array *array);
614 static inline void snd_array_init(struct snd_array *array, unsigned int size,
615 				  unsigned int align)
616 {
617 	array->elem_size = size;
618 	array->alloc_align = align;
619 }
620 
621 static inline void *snd_array_elem(struct snd_array *array, unsigned int idx)
622 {
623 	return array->list + idx * array->elem_size;
624 }
625 
626 static inline unsigned int snd_array_index(struct snd_array *array, void *ptr)
627 {
628 	return (unsigned long)(ptr - array->list) / array->elem_size;
629 }
630 
631 /* a helper macro to iterate for each snd_array element */
632 #define snd_array_for_each(array, idx, ptr) \
633 	for ((idx) = 0, (ptr) = (array)->list; (idx) < (array)->used; \
634 	     (ptr) = snd_array_elem(array, ++(idx)))
635 
636 #endif /* __SOUND_HDAUDIO_H */
637