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