-/*--------------------------- DMA init ----------------------------*/
-#ifdef ISA
-
-/*
- * init DMA
- */
-void init_dma(struct s_smc *smc, int dma)
-{
- SK_UNUSED(smc) ;
-
- /*
- * set cascade mode,
- * clear mask bit (enable DMA cannal)
- */
- if (dma > 3) {
- outp(0xd6,(dma & 0x03) | 0xc0) ;
- outp(0xd4, dma & 0x03) ;
- }
- else {
- outp(0x0b,(dma & 0x03) | 0xc0) ;
- outp(0x0a,dma & 0x03) ;
- }
-}
-
-/*
- * disable DMA
- */
-void dis_dma(struct s_smc *smc, int dma)
-{
- SK_UNUSED(smc) ;
-
- /*
- * set mask bit (disable DMA cannal)
- */
- if (dma > 3) {
- outp(0xd4,(dma & 0x03) | 0x04) ;
- }
- else {
- outp(0x0a,(dma & 0x03) | 0x04) ;
- }
-}
-
-#endif /* ISA */
-
-#ifdef EISA
-
-/*arrays with io addresses of dma controller length and address registers*/
-static const int cntr[8] = { 0x001,0x003,0x005,0x007,0,0x0c6,0x0ca,0x0ce } ;
-static const int base[8] = { 0x000,0x002,0x004,0x006,0,0x0c4,0x0c8,0x0cc } ;
-static const int page[8] = { 0x087,0x083,0x081,0x082,0,0x08b,0x089,0x08a } ;
-
-void init_dma(struct s_smc *smc, int dma)
-{
- /*
- * extended mode register
- * 32 bit IO
- * type c
- * TC output
- * disable stop
- */
-
- /* mode read (write) demand */
- smc->hw.dma_rmode = (dma & 3) | 0x08 | 0x0 ;
- smc->hw.dma_wmode = (dma & 3) | 0x04 | 0x0 ;
-
- /* 32 bit IO's, burst DMA mode (type "C") */
- smc->hw.dma_emode = (dma & 3) | 0x08 | 0x30 ;
-
- outp((dma < 4) ? 0x40b : 0x4d6,smc->hw.dma_emode) ;
-
- /* disable chaining */
- outp((dma < 4) ? 0x40a : 0x4d4,(dma&3)) ;
-
- /*load dma controller addresses for fast access during set dma*/
- smc->hw.dma_base_word_count = cntr[smc->hw.dma];
- smc->hw.dma_base_address = base[smc->hw.dma];
- smc->hw.dma_base_address_page = page[smc->hw.dma];
-
-}
-
-void dis_dma(struct s_smc *smc, int dma)
-{
- SK_UNUSED(smc) ;
-
- outp((dma < 4) ? 0x0a : 0xd4,(dma&3)|4) ;/* mask bit */
-}
-#endif /* EISA */
-
-#ifdef MCA
-void init_dma(struct s_smc *smc, int dma)
-{
- SK_UNUSED(smc) ;
- SK_UNUSED(dma) ;
-}
-
-void dis_dma(struct s_smc *smc, int dma)
-{
- SK_UNUSED(smc) ;
- SK_UNUSED(dma) ;
-}
-#endif
-
-#ifdef PCI
-void init_dma(struct s_smc *smc, int dma)
-{
- SK_UNUSED(smc) ;
- SK_UNUSED(dma) ;
-}
-
-void dis_dma(struct s_smc *smc, int dma)
-{
- SK_UNUSED(smc) ;
- SK_UNUSED(dma) ;
-}
-#endif
-