drivers/dd/sound/wave.c

   1 ULONG OldIRQ;
   2 PKINTERRUPT IrqObject;
   3 BOOLEAN DMAOutputISR(PKINTERRUPT Interrupt, PVOID ServiceContext)
   4 {
   5         printk("interrupt\n");
   6         return FALSE;
   7 }
   8
   9 void sb16_play(WAVE_HDR* wave)
  10 {
  11         unsigned int eflags;
  12         ULONG MappedIrq;
  13         KIRQL Dirql;
  14         KAFFINITY Affinity;
  15         PKINTERRUPT IrqObject;
  16         unsigned int mask,newmask;
  17
  18         unsigned int i;
  19         unsigned int tmp[255];
  20         i=0;
  21         dump_wav(wave);
  22         do
  23         {
  24                 tmp[i++]=get_dma_page(0x0fffff+IDMAP_BASE);
  25                         printk("0x%x ",tmp[i-1]);
  26         }
  27         while((tmp[i-1]&0xffff)!=0);
  28                         free_page((tmp[0])-IDMAP_BASE,i-1);
  29         sb16.buffer=((unsigned char*)tmp[i-1]);
  30
  31    /*
  32     * Because this is used by alomost every subsystem including irqs it
  33     * must be atomic. The following code sequence disables interrupts after
  34     * saving the previous state of the interrupt flag
  35     */
  36
  37         __asm__("pushf\n\tpop %0\n\tcli\n\t"
  38            : "=m" (eflags)
  39            : );
  40
  41        memcpy(sb16.buffer,(&wave->data),wave->dLen);
  42
  43
  44                                 MappedIrq = HalGetInterruptVector(Internal,0,0,8+sb16.irq,&Dirql,&Affinity);
  45
  46
  47
  48                                 IoConnectInterrupt(&IrqObject,DMAOutputISR,0,NULL,MappedIrq,Dirql,Dirql,0,FALSE,Affinity,FALSE);
  49
  50         mask=inb(0x21);
  51         newmask=((int)1<<sb16.irq);
  52         outb(0x21,(mask&~newmask));
  53
  54        // Restore the interrupt flag
  55         __asm__("push %0\n\tpopf\n\t"
  56                    :
  57                    : "m" (eflags));
  58
  59
  60
  61         disable_dma(sb16.dma8);
  62         //outb(0x0a,5);
  63         clear_dma_ff(1);
  64         //outb(0xc,0);
  65         set_dma_count(1,wave->dLen);
  66         set_dma_mode(1,DMA_MODE_WRITE);
  67         //outb(0xb,0x49);
  68         //outb(0x3,(wave->dLen)&0xff);
  69         //outb(0x3,((unsigned int)(wave->dLen)>>8)&0xff);
  70         set_dma_addr(sb16.dma8,(unsigned int)sb16.buffer-IDMAP_BASE);
  71         //outb(0x83,(((unsigned int)(sb16.buffer-IDMAP_BASE)>>16))&0xf);
  72         //outb(0x2,((unsigned int)sb16.buffer&0xff));
  73         //outb(0x2,(((unsigned int)(sb16.buffer-IDMAP_BASE)>>8))&0xff);
  74         enable_dma(sb16.dma8);
  75         //outb(0xa,1);
  76
  77         write_dsp(sb16.base,0x00D1);
  78
  79         write_dsp(sb16.base,0x40);
  80         write_dsp(sb16.base,((unsigned char)256-(1000000/wave->nSamplesPerSec)));
  81
  82   outb(sb16.base + 4, (int) 0xa);
  83   outb(sb16.base + 5, (int) 0x00);
  84
  85   outb(sb16.base + 4, (int) 4);
  86   outb(sb16.base + 5, (int) 0xFF);
  87
  88   outb(sb16.base + 4, (int) 0x22);
  89   outb(sb16.base + 5, (int) 0xFF);
  90
  91         write_dsp(sb16.base,0x14);
  92         write_dsp(sb16.base,(wave->dLen&0x00ff));
  93         write_dsp(sb16.base,((wave->dLen)&0xff00)>>8);
  94
  95 //      write_dsp(sb16.base,0xc0);
  96 //      write_dsp(sb16.base,0x0);
  97 //      OldIRQ=HalGetInterruptVector(Internal,0,0,irq+8,&irql,&affinity);
  98 //      printk("OldIRQ: 0x%x\n",OldIRQ);
  99
 100 //  status=IoConnectInterrupt(&IrqObject,playRoutine,0,NULL,OldIRQ,irql,irql,0,FALSE,affinity,FALSE);
 101 //  if(status!=STATUS_SUCCESS) printk("Couldn't set irq\n");
 102 //  else printk("IRQ set\n");
 103
 104 }
 105
 106 void dump_wav(WAVE_HDR* wave)
 107 {
 108         printk("wave.rID: %c%c%c%c\n",wave->rID[0],wave->rID[1],wave->rID[2],wave->rID[3]);
 109         printk("wave.rLen: 0x%x\n",wave->rLen);
 110         printk("wave.wID: %c%c%c%c\n",wave->wID[0],wave->wID[1],wave->wID[2],wave->wID[3]);
 111         printk("wave.fID: %c%c%c%c\n",wave->fID[0],wave->fID[1],wave->fID[2],wave->fID[3]);
 112         printk("wave.fLen: 0x%x\n",wave->fLen);
 113         printk("wave.wFormatTag: 0x%x\n",wave->wFormatTag);
 114         printk("wave.nChannels: 0x%x\n",wave->nChannels);
 115         printk("wave.nSamplesPerSec: 0x%x\n",wave->nSamplesPerSec);
 116         printk("wave.nAvgBytesPerSec: 0x%x\n",wave->nAvgBytesPerSec);
 117         printk("wave.nBlockAlign: 0x%x\n",wave->nBlockAlign);
 118         printk("wave.FormatSpecific: 0x%x\n",wave->FormatSpecific);
 119         printk("wave.dID: %c%c%c%c\n",wave->dID[0],wave->dID[1],wave->dID[2],wave->dID[3]);
 120         printk("wave.dLen: 0x%x\n",wave->dLen);
 121 }
 122
 123 BOOLEAN playRoutine(PKINTERRUPT Interrupt,PVOID ServiceContext)
 124 {
 125         return FALSE;
 126 }