+static int sb16_detect_irq(void)
+{
+ int i, irqsel;
+ static int irqtab[] = {2, 5, 7, 10};
+
+ irq = 0;
+ irqsel = read_mix(MIX_IRQ_SEL);
+ for(i=0; i<4; i++) {
+ if(irqsel & (1 << i)) {
+ irq = irqtab[i];
+ break;
+ }
+ }
+ if(!irq) {
+ /* try to force IRQ 5 */
+ write_mix(2, MIX_IRQ_SEL); /* bit1 selects irq 5 */
+
+ /* re-read to verify */
+ irqsel = read_mix(MIX_IRQ_SEL);
+ if(irqsel != 2) {
+ return -1;
+ }
+ irq = 5;
+ }
+
+ return irq;
+}
+
+static int sb16_detect_dma(void)
+{
+ int i, dmasel, tmp;
+ static int dmatab[] = {0, 1, -1, 3, -1, 5, 6, 7};
+
+ dma_chan = -1;
+ dma16_chan = -1;
+ dmasel = read_mix(MIX_DMA_SEL);
+ for(i=0; i<4; i++) {
+ if(dmasel & (1 << i)) {
+ dma_chan = dmatab[i];
+ break;
+ }
+ }
+ for(i=5; i<8; i++) {
+ if(dmasel & (1 << i)) {
+ dma16_chan = dmatab[i];
+ break;
+ }
+ }
+ if(dma_chan == -1) {
+ /* try to force DMA 1 */
+ dmasel |= 2;
+ }
+ if(dma16_chan == -1) {
+ /* try to force 16bit DMA 5 */
+ dmasel |= 0x20;
+ }
+
+ if(dma_chan == -1 || dma16_chan == -1) {
+ write_mix(dmasel, MIX_DMA_SEL);
+
+ /* re-read to verify */
+ tmp = read_mix(MIX_DMA_SEL);
+ if(tmp != dmasel) {
+ return -1;
+ }
+ dma_chan = 1;
+ dma16_chan = 5;
+ }
+
+ return dma_chan;
+}
+