include/sound/emu8000.h

Source file repositories/reference/linux-study-clean/include/sound/emu8000.h

File Facts

System
Linux kernel
Corpus path
include/sound/emu8000.h
Extension
.h
Size
3333 bytes
Lines
106
Domain
Driver Families
Bucket
include/sound
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct snd_emu8000 {

	struct snd_emux *emu;

	int index;		/* sequencer client index */
	int seq_ports;		/* number of sequencer ports */
	int fm_chorus_depth;	/* FM OPL3 chorus depth */
	int fm_reverb_depth;	/* FM OPL3 reverb depth */

	int mem_size;		/* memory size */
	unsigned long port1;	/* Port usually base+0 */
	unsigned long port2;	/* Port usually at base+0x400 */
	unsigned long port3;	/* Port usually at base+0x800 */
	unsigned short last_reg;/* Last register command */
	spinlock_t reg_lock;

	int dram_checked;

	struct snd_card *card;		/* The card that this belongs to */

	int chorus_mode;
	int reverb_mode;
	int bass_level;
	int treble_level;

	struct snd_util_memhdr *memhdr;

	spinlock_t control_lock;
	struct snd_kcontrol *controls[EMU8000_NUM_CONTROLS];

	struct snd_pcm *pcm; /* pcm on emu8000 wavetable */

};

/* sequencer device id */
#define SNDRV_SEQ_DEV_ID_EMU8000	"emu8000-synth"


/* exported functions */
int snd_emu8000_new(struct snd_card *card, int device, long port, int seq_ports,
		    struct snd_seq_device **ret);
void snd_emu8000_poke(struct snd_emu8000 *emu, unsigned int port, unsigned int reg,
		      unsigned int val);
unsigned short snd_emu8000_peek(struct snd_emu8000 *emu, unsigned int port,
				unsigned int reg);
void snd_emu8000_poke_dw(struct snd_emu8000 *emu, unsigned int port, unsigned int reg,
			 unsigned int val);
unsigned int snd_emu8000_peek_dw(struct snd_emu8000 *emu, unsigned int port,
				 unsigned int reg);
void snd_emu8000_dma_chan(struct snd_emu8000 *emu, int ch, int mode);

void snd_emu8000_init_fm(struct snd_emu8000 *emu);

void snd_emu8000_update_chorus_mode(struct snd_emu8000 *emu);
void snd_emu8000_update_reverb_mode(struct snd_emu8000 *emu);
void snd_emu8000_update_equalizer(struct snd_emu8000 *emu);
int snd_emu8000_load_chorus_fx(struct snd_emu8000 *emu, int mode, const void __user *buf, long len);
int snd_emu8000_load_reverb_fx(struct snd_emu8000 *emu, int mode, const void __user *buf, long len);

#endif /* __SOUND_EMU8000_H */

Annotation

Implementation Notes