Minix2.0/src/kernel/sb16.h
#ifndef SB16_H
#define SB16_H
#define SB_DEBUG 0 /* 1 = print debug info */
#define SB_DEBUG_2 0 /* 1 = print more debug info */
#define SB_TIMEOUT 32000 /* timeout count */
/* IRQ, base address and DMA channels */
#define SB_IRQ 5
#define SB_BASE_ADDR 0x220 /* 0x210, 0x220, 0x230, 0x240,
* 0x250, 0x260, 0x280
*/
#define SB_DMA_8 1 /* 0, 1, 3 */
#define SB_DMA_16 5 /* 5, 6, 7 */
#if _WORD_SIZE == 2
#define DMA_SIZE 8192 /* Dma buffer MUST BE MULTIPLE OF 2 */
#else
#define DMA_SIZE 32768 /* Dma buffer MUST BE MULTIPLE OF 2 */
#endif
/* Some defaults for the DSP */
#define DEFAULT_SPEED 22050 /* Sample rate */
#define DEFAULT_BITS 8 /* Nr. of bits */
#define DEFAULT_SIGN 0 /* 0 = unsigned, 1 = signed */
#define DEFAULT_STEREO 0 /* 0 = mono, 1 = stereo */
/* DMA port addresses */
#define DMA8_ADDR ((SB_DMA_8 & 3) << 1) + 0x00
#define DMA8_COUNT ((SB_DMA_8 & 3) << 1) + 0x01
#define DMA8_MASK 0x0A
#define DMA8_MODE 0x0B
#define DMA8_CLEAR 0x0C
/* If after this preprocessing stuff DMA8_PAGE is not defined
* the 8-bit DMA channel specified is not valid
*/
#if SB_DMA_8 == 0
# define DMA8_PAGE 0x87
#else
# if SB_DMA_8 == 1
# define DMA8_PAGE 0x83
# else
# if SB_DMA_8 == 3
# define DMA8_PAGE 0x82
# endif
# endif
#endif
#define DMA16_ADDR ((SB_DMA_16 & 3) << 2) + 0xC0
#define DMA16_COUNT ((SB_DMA_16 & 3) << 2) + 0xC2
#define DMA16_MASK 0xD4
#define DMA16_MODE 0xD6
#define DMA16_CLEAR 0xD8
/* If after this preprocessing stuff DMA16_PAGE is not defined
* the 16-bit DMA channel specified is not valid
*/
#if SB_DMA_16 == 5
# define DMA16_PAGE 0x8B
#else
# if SB_DMA_16 == 6
# define DMA16_PAGE 0x89
# else
# if SB_DMA_16 == 7
# define DMA16_PAGE 0x8A
# endif
# endif
#endif
/* DMA modes */
#define DMA16_AUTO_PLAY 0x58 + (SB_DMA_16 & 3)
#define DMA16_AUTO_REC 0x54 + (SB_DMA_16 & 3)
#define DMA8_AUTO_PLAY 0x58 + SB_DMA_8
#define DMA8_AUTO_REC 0x54 + SB_DMA_8
/* IO ports for soundblaster */
#define DSP_RESET 0x6 + SB_BASE_ADDR
#define DSP_READ 0xA + SB_BASE_ADDR
#define DSP_WRITE 0xC + SB_BASE_ADDR
#define DSP_COMMAND 0xC + SB_BASE_ADDR
#define DSP_STATUS 0xC + SB_BASE_ADDR
#define DSP_DATA_AVL 0xE + SB_BASE_ADDR
#define DSP_DATA16_AVL 0xF + SB_BASE_ADDR
#define MIXER_REG 0x4 + SB_BASE_ADDR
#define MIXER_DATA 0x5 + SB_BASE_ADDR
#define OPL3_LEFT 0x0 + SB_BASE_ADDR
#define OPL3_RIGHT 0x2 + SB_BASE_ADDR
#define OPL3_BOTH 0x8 + SB_BASE_ADDR
/* DSP Commands */
#define DSP_INPUT_RATE 0x42 /* set input sample rate */
#define DSP_OUTPUT_RATE 0x41 /* set output sample rate */
#define DSP_CMD_SPKON 0xD1 /* set speaker on */
#define DSP_CMD_SPKOFF 0xD3 /* set speaker off */
#define DSP_CMD_DMA8HALT 0xD0 /* halt DMA 8-bit operation */
#define DSP_CMD_DMA8CONT 0xD4 /* continue DMA 8-bit operation */
#define DSP_CMD_DMA16HALT 0xD5 /* halt DMA 16-bit operation */
#define DSP_CMD_DMA16CONT 0xD6 /* continue DMA 16-bit operation */
#define DSP_GET_VERSION 0xE1 /* get version number of DSP */
#define DSP_CMD_8BITAUTO_IN 0xCE /* 8 bit auto-initialized input */
#define DSP_CMD_8BITAUTO_OUT 0xC6 /* 8 bit auto-initialized output */
#define DSP_CMD_16BITAUTO_IN 0xBE /* 16 bit auto-initialized input */
#define DSP_CMD_16BITAUTO_OUT 0xB6 /* 16 bit auto-initialized output */
#define DSP_CMD_IRQREQ8 0xF2 /* Interrupt request 8 bit */
#define DSP_CMD_IRQREQ16 0xF3 /* Interrupt request 16 bit */
/* DSP Modes */
#define DSP_MODE_MONO_US 0x00 /* Mono unsigned */
#define DSP_MODE_MONO_S 0x10 /* Mono signed */
#define DSP_MODE_STEREO_US 0x20 /* Stereo unsigned */
#define DSP_MODE_STEREO_S 0x30 /* Stereo signed */
/* MIXER commands */
#define MIXER_RESET 0x00 /* Reset */
#define MIXER_DAC_LEVEL 0x04 /* Used for detection only */
#define MIXER_MASTER_LEFT 0x30 /* Master volume left */
#define MIXER_MASTER_RIGHT 0x31 /* Master volume right */
#define MIXER_DAC_LEFT 0x32 /* Dac level left */
#define MIXER_DAC_RIGHT 0x33 /* Dac level right */
#define MIXER_FM_LEFT 0x34 /* Fm level left */
#define MIXER_FM_RIGHT 0x35 /* Fm level right */
#define MIXER_CD_LEFT 0x36 /* Cd audio level left */
#define MIXER_CD_RIGHT 0x37 /* Cd audio level right */
#define MIXER_LINE_LEFT 0x38 /* Line in level left */
#define MIXER_LINE_RIGHT 0x39 /* Line in level right */
#define MIXER_MIC_LEVEL 0x3A /* Microphone level */
#define MIXER_PC_LEVEL 0x3B /* Pc speaker level */
#define MIXER_OUTPUT_CTRL 0x3C /* Output control */
#define MIXER_IN_LEFT 0x3D /* Input control left */
#define MIXER_IN_RIGHT 0x3E /* Input control right */
#define MIXER_GAIN_IN_LEFT 0x3F /* Input gain control left */
#define MIXER_GAIN_IN_RIGHT 0x40 /* Input gain control right */
#define MIXER_GAIN_OUT_LEFT 0x41 /* Output gain control left */
#define MIXER_GAIN_OUT_RIGHT 0x42 /* Output gain control rigth */
#define MIXER_AGC 0x43 /* Automatic gain control */
#define MIXER_TREBLE_LEFT 0x44 /* Treble left */
#define MIXER_TREBLE_RIGHT 0x45 /* Treble right */
#define MIXER_BASS_LEFT 0x46 /* Bass left */
#define MIXER_BASS_RIGHT 0x47 /* Bass right */
#define MIXER_SET_IRQ 0x80 /* Set irq number */
#define MIXER_SET_DMA 0x81 /* Set DMA channels */
#define MIXER_IRQ_STATUS 0x82 /* Irq status */
/* Mixer constants */
#define MIC 0x01 /* Microphone */
#define CD_RIGHT 0x02
#define CD_LEFT 0x04
#define LINE_RIGHT 0x08
#define LINE_LEFT 0x10
#define FM_RIGHT 0x20
#define FM_LEFT 0x40
/* DSP constants */
#define DSP_MAX_SPEED 44100 /* Max sample speed in KHz */
#define DSP_MIN_SPEED 4000 /* Min sample speed in KHz */
#define DSP_MAX_FRAGMENT_SIZE DMA_SIZE /* Maximum fragment size */
#define DSP_MIN_FRAGMENT_SIZE 1024 /* Minimum fragment size */
/* 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))
/* Function prototypes used by mixer and dsp */
_PROTOTYPE(int mixer_set, (int reg, int data));
#endif /* SB16_H */