91 lines
3.1 KiB
C
91 lines
3.1 KiB
C
#ifndef AUDIO_FW_H
|
|
#define AUDIO_FW_H
|
|
|
|
#include <minix/drivers.h>
|
|
#include <minix/driver.h>
|
|
#include <sys/ioc_sound.h>
|
|
|
|
|
|
_PROTOTYPE( int drv_init, (void) );
|
|
_PROTOTYPE( int drv_init_hw, (void) );
|
|
_PROTOTYPE( int drv_reset, (void) );
|
|
_PROTOTYPE( int drv_start, (int sub_dev, int DmaMode) );
|
|
_PROTOTYPE( int drv_stop, (int sub_dev) );
|
|
_PROTOTYPE( int drv_set_dma, (u32_t dma, u32_t length, int chan) );
|
|
_PROTOTYPE( int drv_reenable_int, (int chan) );
|
|
_PROTOTYPE( int drv_int_sum, (void) );
|
|
_PROTOTYPE( int drv_int, (int sub_dev) );
|
|
_PROTOTYPE( int drv_pause, (int chan) );
|
|
_PROTOTYPE( int drv_resume, (int chan) );
|
|
_PROTOTYPE( int drv_io_ctl, (int request, void * val, int * len, int sub_dev) );
|
|
_PROTOTYPE( int drv_get_irq, (char *irq) );
|
|
_PROTOTYPE( int drv_get_frag_size, (u32_t *frag_size, int sub_dev) );
|
|
|
|
|
|
|
|
/* runtime status fields */
|
|
typedef struct {
|
|
int readable;
|
|
int writable;
|
|
int DmaSize;
|
|
int NrOfDmaFragments;
|
|
int MinFragmentSize;
|
|
int NrOfExtraBuffers;
|
|
int Nr; /* sub device number */
|
|
int Opened; /* sub device opened */
|
|
int DmaBusy; /* is dma busy? */
|
|
int DmaMode; /* DEV_WRITE / DEV_READ */
|
|
int DmaReadNext; /* current dma buffer */
|
|
int DmaFillNext; /* next dma buffer to fill */
|
|
int DmaLength;
|
|
int BufReadNext; /* start of extra circular buffer */
|
|
int BufFillNext; /* end of extra circular buffer */
|
|
int BufLength;
|
|
int RevivePending; /* process waiting for this dev? */
|
|
int ReviveStatus; /* return val when proc unblocked */
|
|
endpoint_t ReviveProcNr; /* the process to unblock */
|
|
cp_grant_id_t ReviveGrant; /* grant id associated with io */
|
|
void *UserBuf; /* address of user's data buffer */
|
|
int ReadyToRevive; /* are we ready to revive process?*/
|
|
endpoint_t SourceProcNr; /* process to send notify to (FS) */
|
|
u32_t FragSize; /* dma fragment size */
|
|
char *DmaBuf; /* the dma buffer; extra space for
|
|
page alignment */
|
|
phys_bytes DmaPhys; /* physical address of dma buffer */
|
|
char* DmaPtr; /* pointer to aligned dma buffer */
|
|
int OutOfData; /* all buffers empty? */
|
|
char *ExtraBuf; /* don't use extra buffer;just
|
|
declare a pointer to supress
|
|
error messages */
|
|
} sub_dev_t;
|
|
|
|
typedef struct {
|
|
int minor_dev_nr;
|
|
int read_chan;
|
|
int write_chan;
|
|
int io_ctl;
|
|
} special_file_t;
|
|
|
|
typedef struct {
|
|
char* DriverName;
|
|
int NrOfSubDevices;
|
|
int NrOfSpecialFiles;
|
|
} drv_t;
|
|
|
|
EXTERN drv_t drv;
|
|
EXTERN sub_dev_t sub_dev[];
|
|
EXTERN special_file_t special_file[];
|
|
|
|
/* Number of bytes you can DMA before hitting a 64K boundary: */
|
|
#define dma_bytes_left(phys) \
|
|
((unsigned) (sizeof(int) == 2 ? 0 : 0x10000) - (unsigned) ((phys) & 0xFFFF))
|
|
|
|
#define NO_CHANNEL -1
|
|
|
|
#define TRUE 1
|
|
#define FALSE 0
|
|
#define NO_DMA 0
|
|
|
|
|
|
#endif /* AUDIO_FW_H */
|