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zlox_sb16.c
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zlox_sb16.c
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// zlox_sb16.c -- something relate to Sound Blaster 16
#include "zlox_monitor.h"
#include "zlox_isr.h"
#include "zlox_task.h"
#include "zlox_sb16.h"
#include "zlox_audio.h"
ZLOX_UINT32 SB16_DmaPhys = 0;
ZLOX_TASK * SB16_Task = ZLOX_NULL;
ZLOX_SINT32 DspVersion[2];
ZLOX_UINT32 SB16_DspFillData = ZLOX_SB_DEFAULT_FILL_DATA;
static ZLOX_UINT32 DspStereo = ZLOX_SB_DEFAULT_STEREO;
static ZLOX_UINT32 DspSpeed = ZLOX_SB_DEFAULT_SPEED;
static ZLOX_UINT32 DspBits = ZLOX_SB_DEFAULT_BITS;
static ZLOX_UINT32 DspSign = ZLOX_SB_DEFAULT_SIGN;
ZLOX_BOOL dsp_start = ZLOX_FALSE;
ZLOX_BOOL running = ZLOX_FALSE;
ZLOX_BOOL has_vmware_cont = ZLOX_FALSE;
extern ZLOX_ISR_CALLBACK interrupt_callbacks[256];
static ZLOX_VOID zlox_sb16_callback();
ZLOX_SINT32 zlox_sb16_dsp_reenable_int();
ZLOX_SINT32 zlox_sb16_dsp_start(ZLOX_UINT32 DmaPhys, ZLOX_SINT32 DmaMode);
ZLOX_SINT32 zlox_sb16_dsp_dma_setup(ZLOX_UINT32 DmaPhys, ZLOX_SINT32 count, ZLOX_SINT32 DmaMode);
ZLOX_SINT32 zlox_sb16_dsp_set_speed(ZLOX_UINT32 speed, ZLOX_BOOL need_cmd);
ZLOX_SINT32 zlox_sb16_dsp_reset();
ZLOX_SINT32 zlox_sb16_dsp_command(ZLOX_SINT32 value);
ZLOX_SINT32 zlox_sb16_mixer_set(ZLOX_SINT32 reg, ZLOX_SINT32 data);
ZLOX_SINT32 zlox_sb16_mixer_get(ZLOX_SINT32 reg);
ZLOX_SINT32 zlox_sb16_init()
{
ZLOX_SINT32 i;
//ZLOX_SINT32 DspVersion[2];
if(zlox_sb16_dsp_reset() != 0) {
zlox_monitor_write("No SoundBlaster!\n"); /* No SoundBlaster */
return -1;
}
zlox_monitor_write("SoundBlaster is detected! ");
DspVersion[0] = DspVersion[1] = 0;
zlox_sb16_dsp_command(ZLOX_SB_DSP_GET_VERSION);
for(i = 1000; i; i--) {
if(zlox_inb(ZLOX_SB_DSP_DATA_AVL) & 0x80) {
if(DspVersion[0] == 0) {
DspVersion[0] = zlox_inb(ZLOX_SB_DSP_READ);
} else {
DspVersion[1] = zlox_inb(ZLOX_SB_DSP_READ);
break;
}
}
}
if(DspVersion[0] < 4) {
zlox_monitor_write("sb16: No SoundBlaster 16 compatible card detected\n");
return -1;
}
zlox_monitor_write("sb16: SoundBlaster DSP version ");
zlox_monitor_write_dec(DspVersion[0]);
zlox_monitor_write(".");
zlox_monitor_write_dec(DspVersion[1]);
zlox_monitor_write(" detected!\n");
/* set SB to use our IRQ and DMA channels */
zlox_sb16_mixer_set(ZLOX_SB_MIXER_SET_IRQ, (1 << (ZLOX_SB_IRQ / 2 - 1)));
zlox_sb16_mixer_set(ZLOX_SB_MIXER_SET_DMA, (1 << ZLOX_SB_DMA_8 | 1 << ZLOX_SB_DMA_16));
if(interrupt_callbacks[ZLOX_IRQ0 + ZLOX_SB_IRQ] != 0)
{
zlox_monitor_write("sb16: irq has been occupied!\n");
return -1;
}
zlox_register_interrupt_callback(ZLOX_IRQ0 + ZLOX_SB_IRQ,
&zlox_sb16_callback);
return 0;
}
static ZLOX_VOID zlox_sb16_callback()
{
//zlox_monitor_write("sb16: in callback\n");
if(running)
{
ZLOX_TASK_MSG msg = {0};
ZLOX_SINT32 status = zlox_sb16_mixer_get(ZLOX_SB_MIXER_IRQ_STATUS);
/*zlox_monitor_write("[sb16: irq: \n");
zlox_monitor_write_hex(status);
zlox_monitor_write("]");*/
if(!(status & 0x03)) // must be 8 bit or 16 bit irq interrupt!
return;
if(zlox_audio_get_data() == ZLOX_TRUE)
{
if(SB16_Task != ZLOX_NULL)
{
msg.type = ZLOX_MT_AUDIO_INT;
zlox_send_tskmsg(SB16_Task,&msg);
}
if(has_vmware_cont)
{
zlox_sb16_dsp_command((DspBits == 8 ? ZLOX_SB_DSP_CMD_DMA8CONT :
ZLOX_SB_DSP_CMD_DMA16CONT));
}
zlox_sb16_dsp_reenable_int();
return;
}
else
{
zlox_sb16_dsp_command((DspBits == 8 ? ZLOX_SB_DSP_CMD_DMA8EXIT :
ZLOX_SB_DSP_CMD_DMA16EXIT));
dsp_start = ZLOX_FALSE;
running = ZLOX_FALSE;
zlox_audio_end();
if(SB16_Task != ZLOX_NULL)
{
msg.type = ZLOX_MT_AUDIO_END;
zlox_send_tskmsg(SB16_Task,&msg);
SB16_Task = ZLOX_NULL;
}
if(has_vmware_cont)
has_vmware_cont = ZLOX_FALSE;
zlox_sb16_dsp_reenable_int();
return;
}
}
}
ZLOX_SINT32 zlox_sb16_dsp_reenable_int()
{
zlox_inb((DspBits == 8 ? ZLOX_SB_DSP_DATA_AVL : ZLOX_SB_DSP_DATA16_AVL));
return 0;
}
ZLOX_SINT32 zlox_sb16_dsp_pause()
{
if(running)
{
zlox_sb16_dsp_command((DspBits == 8 ? ZLOX_SB_DSP_CMD_DMA8PAUSE :
ZLOX_SB_DSP_CMD_DMA16PAUSE));
running = ZLOX_FALSE;
zlox_sb16_dsp_reenable_int();
return 0;
}
return -1;
}
ZLOX_SINT32 zlox_sb16_dsp_continue()
{
if(dsp_start && !running)
{
zlox_sb16_dsp_command((DspBits == 8 ? ZLOX_SB_DSP_CMD_DMA8CONT :
ZLOX_SB_DSP_CMD_DMA16CONT));
running = ZLOX_TRUE;
if(DspVersion[1] == 13)
has_vmware_cont = ZLOX_TRUE;
return 0;
}
return -1;
}
ZLOX_SINT32 zlox_sb16_dsp_exit()
{
if(!dsp_start)
return -1;
zlox_sb16_dsp_command((DspBits == 8 ? ZLOX_SB_DSP_CMD_DMA8EXIT :
ZLOX_SB_DSP_CMD_DMA16EXIT));
dsp_start = ZLOX_FALSE;
running = ZLOX_FALSE;
zlox_audio_end();
if(SB16_Task != ZLOX_NULL)
SB16_Task = ZLOX_NULL;
if(has_vmware_cont)
has_vmware_cont = ZLOX_FALSE;
zlox_sb16_dsp_reenable_int();
return 0;
}
ZLOX_SINT32 zlox_sb16_dsp_start(ZLOX_UINT32 DmaPhys, ZLOX_SINT32 DmaMode)
{
if(dsp_start)
return -2;
if(DmaPhys == 0)
DmaPhys = SB16_DmaPhys;
zlox_sb16_dsp_reset();
zlox_sb16_dsp_dma_setup(DmaPhys, ZLOX_SB_DMA_SIZE, DmaMode);
zlox_sb16_dsp_set_speed(DspSpeed, ZLOX_TRUE);
/* Put the speaker on */
if(DmaMode == ZLOX_SB_WRITE_DMA)
{
zlox_sb16_dsp_command(ZLOX_SB_DSP_CMD_SPKON); /* put speaker on */
/* Program DSP with dma mode */
zlox_sb16_dsp_command((DspBits == 8 ? ZLOX_SB_DSP_CMD_8BITAUTO_OUT :
ZLOX_SB_DSP_CMD_16BITAUTO_OUT));
} else {
zlox_sb16_dsp_command(ZLOX_SB_DSP_CMD_SPKOFF); /* put speaker off */
/* Program DSP with dma mode */
zlox_sb16_dsp_command((DspBits == 8 ? ZLOX_SB_DSP_CMD_8BITAUTO_IN :
ZLOX_SB_DSP_CMD_16BITAUTO_IN));
}
/* Program DSP with transfer mode */
if (!DspSign)
{
zlox_sb16_dsp_command((DspStereo == 1 ?
ZLOX_SB_DSP_MODE_STEREO_US : ZLOX_SB_DSP_MODE_MONO_US));
}
else
{
zlox_sb16_dsp_command((DspStereo == 1 ?
ZLOX_SB_DSP_MODE_STEREO_S : ZLOX_SB_DSP_MODE_MONO_S));
}
if (DspBits == 8)
{ /* 8 bit transfer */
/* #bytes - 1 */
zlox_sb16_dsp_command((ZLOX_SB_DSP_FRAG_SIZE - 1) >> 0);
zlox_sb16_dsp_command((ZLOX_SB_DSP_FRAG_SIZE - 1) >> 8);
}
else {
/* 16 bit transfer */
/* #words - 1 */
zlox_sb16_dsp_command((ZLOX_SB_DSP_FRAG_SIZE - 2) >> 1);
zlox_sb16_dsp_command((ZLOX_SB_DSP_FRAG_SIZE - 2) >> 9);
}
dsp_start = ZLOX_TRUE;
running = ZLOX_TRUE;
return 0;
}
ZLOX_SINT32 zlox_sb16_dsp_dma_setup(ZLOX_UINT32 address, ZLOX_SINT32 count, ZLOX_SINT32 DmaMode)
{
if(DspBits == 8)
{ /* 8 bit sound */
count--;
zlox_outb(ZLOX_SB_DMA8_MASK, ZLOX_SB_DMA_8 | 0x04); /* Disable DMA channel */
zlox_outb(ZLOX_SB_DMA8_CLEAR, 0x00); /* Clear flip flop */
zlox_outb(ZLOX_SB_DMA8_MODE, (DmaMode == ZLOX_SB_WRITE_DMA ?
ZLOX_SB_DMA8_AUTO_PLAY : ZLOX_SB_DMA8_AUTO_REC));
zlox_outb(ZLOX_SB_DMA8_ADDR, (ZLOX_UINT8)(address >> 0)); /* Low_byte of address */
zlox_outb(ZLOX_SB_DMA8_ADDR, (ZLOX_UINT8)(address >> 8)); /* High byte of address */
zlox_outb(ZLOX_SB_DMA8_PAGE, (ZLOX_UINT8)(address >> 16)); /* 64K page number */
zlox_outb(ZLOX_SB_DMA8_COUNT, (ZLOX_UINT8)(count >> 0)); /* Low byte of count */
zlox_outb(ZLOX_SB_DMA8_COUNT, (ZLOX_UINT8)(count >> 8)); /* High byte of count */
zlox_outb(ZLOX_SB_DMA8_MASK, ZLOX_SB_DMA_8); /* Enable DMA channel */
}
else { /* 16 bit sound */
count -= 2;
zlox_outb(ZLOX_SB_DMA16_MASK, (ZLOX_SB_DMA_16 & 3) | 0x04); /* Disable DMA channel */
zlox_outb(ZLOX_SB_DMA16_CLEAR, 0x00); /* Clear flip flop */
/* Set dma mode */
zlox_outb(ZLOX_SB_DMA16_MODE, (DmaMode == ZLOX_SB_WRITE_DMA ?
ZLOX_SB_DMA16_AUTO_PLAY : ZLOX_SB_DMA16_AUTO_REC));
zlox_outb(ZLOX_SB_DMA16_ADDR, (ZLOX_UINT8)((address >> 1) & 0xFF)); /* Low_byte of address */
zlox_outb(ZLOX_SB_DMA16_ADDR, (ZLOX_UINT8)((address >> 9) & 0x7F)); /* High byte of address */
zlox_outb(ZLOX_SB_DMA16_PAGE, (ZLOX_UINT8)((address >> 16) & 0xFE)); /* 128K page number */
zlox_outb(ZLOX_SB_DMA16_COUNT, (ZLOX_UINT8)(count >> 1)); /* Low byte of count */
zlox_outb(ZLOX_SB_DMA16_COUNT, (ZLOX_UINT8)(count >> 9)); /* High byte of count */
zlox_outb(ZLOX_SB_DMA16_MASK, (ZLOX_SB_DMA_16 & 3)); /* Enable DMA channel */
}
return 0;
}
ZLOX_SINT32 zlox_sb16_dsp_set_speed(ZLOX_UINT32 speed, ZLOX_BOOL need_cmd)
{
if(speed < ZLOX_SB_DSP_MIN_SPEED || speed > ZLOX_SB_DSP_MAX_SPEED) {
return -1;
}
if(need_cmd)
{
/* Soundblaster 16 can be programmed with real sample rates
* instead of time constants
*
* Since you cannot sample and play at the same time
* we set in- and output rate to the same value
*/
zlox_sb16_dsp_command(ZLOX_SB_DSP_INPUT_RATE); /* set input rate */
zlox_sb16_dsp_command(speed >> 8); /* high byte of speed */
zlox_sb16_dsp_command(speed); /* low byte of speed */
zlox_sb16_dsp_command(ZLOX_SB_DSP_OUTPUT_RATE); /* same for output rate */
zlox_sb16_dsp_command(speed >> 8);
zlox_sb16_dsp_command(speed);
}
DspSpeed = speed;
return 0;
}
ZLOX_SINT32 zlox_sb16_dsp_reset()
{
ZLOX_SINT32 i;
zlox_outb(ZLOX_SB_DSP_RESET, 1);
for(i = 0; i < 1000; i++)
; /* wait a while */
zlox_outb(ZLOX_SB_DSP_RESET, 0);
for(i = 0; i < 1000 &&
!(zlox_inb(ZLOX_SB_DSP_DATA_AVL) & 0x80);
i++)
;
if(zlox_inb(ZLOX_SB_DSP_READ) != 0xAA)
return -1;
return 0;
}
ZLOX_SINT32 zlox_sb16_dsp_command(ZLOX_SINT32 value)
{
ZLOX_SINT32 i;
for (i = 0; i < ZLOX_SB_TIMEOUT; i++) {
if((zlox_inb(ZLOX_SB_DSP_STATUS) & 0x80) == 0) {
zlox_outb(ZLOX_SB_DSP_COMMAND, value);
return 0;
}
}
zlox_monitor_write("sb16: SoundBlaster: DSP Command(");
zlox_monitor_write_hex(value);
zlox_monitor_write(") timeout\n");
return -1;
}
ZLOX_SINT32 zlox_sb16_dsp_set_bits(ZLOX_UINT32 bits)
{
/* Sanity checks */
if(bits != 8 && bits != 16) {
return -1;
}
if(dsp_start)
return -2;
DspBits = bits;
return 0;
}
ZLOX_SINT32 zlox_sb16_dsp_set_sign(ZLOX_UINT32 sign)
{
DspSign = (sign > 0 ? 1 : 0);
return 0;
}
ZLOX_SINT32 zlox_sb16_dsp_set_stereo(ZLOX_UINT32 stereo)
{
if(stereo) {
DspStereo = 1;
} else {
DspStereo = 0;
}
return 0;
}
ZLOX_SINT32 zlox_sb16_set_dma_phys(ZLOX_UINT32 DmaPhys, ZLOX_BOOL need_clear)
{
if(DmaPhys == 0)
{
zlox_monitor_write("sb16: DmaPhys is zero!\n");
return -1;
}
SB16_DmaPhys = DmaPhys;
if(need_clear)
zlox_memset((ZLOX_UINT8 *)(DmaPhys), SB16_DspFillData, ZLOX_SB_DMA_SIZE);
return 0;
}
ZLOX_UINT32 zlox_sb16_get_dma_phys()
{
return SB16_DmaPhys;
}
ZLOX_SINT32 zlox_sb16_set_task(ZLOX_TASK * task)
{
if(task == ZLOX_NULL)
return -1;
SB16_Task = task;
return 0;
}
ZLOX_VOID * zlox_sb16_get_task()
{
return (ZLOX_VOID *)SB16_Task;
}
/*=========================================================================*
* mixer
*=========================================================================*/
ZLOX_SINT32 zlox_sb16_mixer_init()
{
/* Try to detect the mixer by writing to MIXER_DAC_LEVEL if the
* value written can be read back the mixer is there
*/
zlox_sb16_mixer_set(ZLOX_SB_MIXER_DAC_LEVEL, 0x10); /* write something to it */
if(zlox_sb16_mixer_get(ZLOX_SB_MIXER_DAC_LEVEL) != 0x10) {
return -1;
}
/* Enable Automatic Gain Control */
zlox_sb16_mixer_set(ZLOX_SB_MIXER_AGC, 0x01);
return 0;
}
ZLOX_SINT32 zlox_sb16_mixer_get_volume(ZLOX_AUD_CTRL_TYPE ctrl_type,
ZLOX_AUD_EXTRA_DATA * extra_data)
{
ZLOX_SINT32 shift = 3;
if(ctrl_type == ZLOX_ACT_MIXER_GET_VOLUME)
{
extra_data->mixer.master_left = zlox_sb16_mixer_get(ZLOX_SB_MIXER_MASTER_LEFT);
extra_data->mixer.master_right = zlox_sb16_mixer_get(ZLOX_SB_MIXER_MASTER_RIGHT);
extra_data->mixer.master_left >>= shift;
extra_data->mixer.master_right >>= shift;
extra_data->mixer.voice_left = zlox_sb16_mixer_get(ZLOX_SB_MIXER_DAC_LEFT);
extra_data->mixer.voice_right = zlox_sb16_mixer_get(ZLOX_SB_MIXER_DAC_RIGHT);
extra_data->mixer.voice_left >>= shift;
extra_data->mixer.voice_right >>= shift;
extra_data->mixer.midi_left = zlox_sb16_mixer_get(ZLOX_SB_MIXER_FM_LEFT);
extra_data->mixer.midi_right = zlox_sb16_mixer_get(ZLOX_SB_MIXER_FM_RIGHT);
extra_data->mixer.midi_left >>= shift;
extra_data->mixer.midi_right >>= shift;
extra_data->mixer.cd_left = zlox_sb16_mixer_get(ZLOX_SB_MIXER_CD_LEFT);
extra_data->mixer.cd_right = zlox_sb16_mixer_get(ZLOX_SB_MIXER_CD_RIGHT);
extra_data->mixer.cd_left >>= shift;
extra_data->mixer.cd_right >>= shift;
extra_data->mixer.line_left = zlox_sb16_mixer_get(ZLOX_SB_MIXER_LINE_LEFT);
extra_data->mixer.line_right = zlox_sb16_mixer_get(ZLOX_SB_MIXER_LINE_RIGHT);
extra_data->mixer.line_left >>= shift;
extra_data->mixer.line_right >>= shift;
extra_data->mixer.mic_volume = zlox_sb16_mixer_get(ZLOX_SB_MIXER_MIC_LEVEL);
extra_data->mixer.mic_volume >>= shift;
extra_data->mixer.pc_volume = zlox_sb16_mixer_get(ZLOX_SB_MIXER_PC_LEVEL);
extra_data->mixer.pc_volume >>= 6;
extra_data->mixer.treble_left = zlox_sb16_mixer_get(ZLOX_SB_MIXER_TREBLE_LEFT);
extra_data->mixer.treble_right = zlox_sb16_mixer_get(ZLOX_SB_MIXER_TREBLE_RIGHT);
extra_data->mixer.treble_left >>= 4;
extra_data->mixer.treble_right >>= 4;
extra_data->mixer.bass_left = zlox_sb16_mixer_get(ZLOX_SB_MIXER_BASS_LEFT);
extra_data->mixer.bass_right = zlox_sb16_mixer_get(ZLOX_SB_MIXER_BASS_RIGHT);
extra_data->mixer.bass_left >>= 4;
extra_data->mixer.bass_right >>= 4;
extra_data->mixer.output_gain_left = zlox_sb16_mixer_get(ZLOX_SB_MIXER_GAIN_OUT_LEFT);
extra_data->mixer.output_gain_right = zlox_sb16_mixer_get(ZLOX_SB_MIXER_GAIN_OUT_RIGHT);
extra_data->mixer.output_gain_left >>= 6;
extra_data->mixer.output_gain_right >>= 6;
extra_data->mixer.output_ctrl = zlox_sb16_mixer_get(ZLOX_SB_MIXER_OUTPUT_CTRL);
return 0;
}
else if(ctrl_type == ZLOX_ACT_MIXER_GET_MASTER)
{
extra_data->mixer.master_left = zlox_sb16_mixer_get(ZLOX_SB_MIXER_MASTER_LEFT);
extra_data->mixer.master_right = zlox_sb16_mixer_get(ZLOX_SB_MIXER_MASTER_RIGHT);
extra_data->mixer.master_left >>= shift;
extra_data->mixer.master_right >>= shift;
return 0;
}
else if(ctrl_type == ZLOX_ACT_MIXER_GET_VOICE)
{
extra_data->mixer.voice_left = zlox_sb16_mixer_get(ZLOX_SB_MIXER_DAC_LEFT);
extra_data->mixer.voice_right = zlox_sb16_mixer_get(ZLOX_SB_MIXER_DAC_RIGHT);
extra_data->mixer.voice_left >>= shift;
extra_data->mixer.voice_right >>= shift;
return 0;
}
return -1;
}
ZLOX_SINT32 zlox_sb16_mixer_set_volume(ZLOX_AUD_CTRL_TYPE ctrl_type,
ZLOX_AUD_EXTRA_DATA * extra_data)
{
ZLOX_SINT32 shift = 3;
ZLOX_SINT32 max_level = 0x1F;
ZLOX_SINT32 reg_left, reg_right;
ZLOX_SINT32 level_left, level_right;
switch(ctrl_type)
{
case ZLOX_ACT_MIXER_SET_MASTER:
reg_left = ZLOX_SB_MIXER_MASTER_LEFT;
reg_right = ZLOX_SB_MIXER_MASTER_RIGHT;
level_left = extra_data->mixer.master_left;
level_right = extra_data->mixer.master_right;
break;
case ZLOX_ACT_MIXER_SET_VOICE:
reg_left = ZLOX_SB_MIXER_DAC_LEFT;
reg_right = ZLOX_SB_MIXER_DAC_RIGHT;
level_left = extra_data->mixer.voice_left;
level_right = extra_data->mixer.voice_right;
break;
case ZLOX_ACT_MIXER_SET_MIDI:
reg_left = ZLOX_SB_MIXER_FM_LEFT;
reg_right = ZLOX_SB_MIXER_FM_RIGHT;
level_left = extra_data->mixer.midi_left;
level_right = extra_data->mixer.midi_right;
break;
case ZLOX_ACT_MIXER_SET_CD:
reg_left = ZLOX_SB_MIXER_CD_LEFT;
reg_right = ZLOX_SB_MIXER_CD_RIGHT;
level_left = extra_data->mixer.cd_left;
level_right = extra_data->mixer.cd_right;
break;
case ZLOX_ACT_MIXER_SET_LINE:
reg_left = ZLOX_SB_MIXER_LINE_LEFT;
reg_right = ZLOX_SB_MIXER_LINE_RIGHT;
level_left = extra_data->mixer.line_left;
level_right = extra_data->mixer.line_right;
break;
case ZLOX_ACT_MIXER_SET_MIC:
reg_right = reg_left = ZLOX_SB_MIXER_MIC_LEVEL;
level_right = level_left = extra_data->mixer.mic_volume;
break;
case ZLOX_ACT_MIXER_SET_PC:
reg_right = reg_left = ZLOX_SB_MIXER_PC_LEVEL;
level_right = level_left = extra_data->mixer.pc_volume;
shift = 6;
max_level = 0x3;
break;
case ZLOX_ACT_MIXER_SET_TREBLE:
reg_left = ZLOX_SB_MIXER_TREBLE_LEFT;
reg_right = ZLOX_SB_MIXER_TREBLE_RIGHT;
level_left = extra_data->mixer.treble_left;
level_right = extra_data->mixer.treble_right;
shift = 4;
max_level = 0xF;
break;
case ZLOX_ACT_MIXER_SET_BASS:
reg_left = ZLOX_SB_MIXER_BASS_LEFT;
reg_right = ZLOX_SB_MIXER_BASS_RIGHT;
level_left = extra_data->mixer.bass_left;
level_right = extra_data->mixer.bass_right;
shift = 4;
max_level = 0xF;
break;
case ZLOX_ACT_MIXER_SET_OUT_GAIN:
reg_left = ZLOX_SB_MIXER_GAIN_OUT_LEFT;
reg_right = ZLOX_SB_MIXER_GAIN_OUT_RIGHT;
level_left = extra_data->mixer.output_gain_left;
level_right = extra_data->mixer.output_gain_right;
shift = 6;
max_level = 0x3;
break;
case ZLOX_ACT_MIXER_SET_OUT_CTRL:
reg_right = reg_left = ZLOX_SB_MIXER_OUTPUT_CTRL;
level_right = level_left = extra_data->mixer.output_ctrl;
shift = 0;
break;
default:
return -1;
break;
}
if(level_left < 0)
level_left = 0;
else if(level_left > max_level)
level_left = max_level;
if(level_right < 0)
level_right = 0;
else if(level_right > max_level)
level_right = max_level;
zlox_sb16_mixer_set(reg_left, level_left << shift);
if(reg_left != reg_right)
zlox_sb16_mixer_set(reg_right, level_right << shift);
return 0;
}
ZLOX_SINT32 zlox_sb16_mixer_set(ZLOX_SINT32 reg, ZLOX_SINT32 data)
{
ZLOX_SINT32 i;
zlox_outb(ZLOX_SB_MIXER_REG, reg);
for(i = 0; i < 100; i++)
;
zlox_outb(ZLOX_SB_MIXER_DATA, data);
return 0;
}
ZLOX_SINT32 zlox_sb16_mixer_get(ZLOX_SINT32 reg)
{
ZLOX_SINT32 i;
zlox_outb(ZLOX_SB_MIXER_REG, reg);
for(i = 0; i < 100; i++)
;
return zlox_inb(ZLOX_SB_MIXER_DATA) & 0xff;
}