patch-2.3.42 linux/arch/sparc/ap1000/dma.c

• Lines: 75
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.41/linux/arch/sparc/ap1000/dma.c
• Orig date: Sun Jan 26 02:07:06 1997

diff -u --recursive --new-file v2.3.41/linux/arch/sparc/ap1000/dma.c linux/arch/sparc/ap1000/dma.c
@@ -1,74 +0,0 @@
-  /*
-   * Copyright 1996 The Australian National University.
-   * Copyright 1996 Fujitsu Laboratories Limited
-   * 
-   * This software may be distributed under the terms of the Gnu
-   * Public License version 2 or later
-  */
-/* dma routines for the AP1000 */
-#include <asm/ap1000/apservice.h>
-#include <asm/ap1000/apreg.h>
-#include <linux/mm.h>
-#include <linux/malloc.h>
-#include <asm/irq.h>
-#include <asm/pgtable.h>
-
-#define DMA_MAX_TRANS_SIZE2 (0xfffffc)
-
-int ap_dma_wait(int ch)
-{
-	int i = 0;
-	while (DMA_IN(ch+DMA_DMST) & DMA_DMST_AC) i++;
-	return i;
-}
-
-/* send some data out a dma channel */
-int ap_dma_go(unsigned long ch,unsigned int p,int size,unsigned long cmd)
-{
-  int rest;
-
-  p = mmu_v2p(p);
-
-  cmd |= DMA_DCMD_ST | DMA_DCMD_TYP_AUTO;
-
-#if 0
-  if (ap_dma_wait(ch)) {
-	  printk("WARNING: dma started when not complete\n");
-  }
-
-  if (cmd == DMA_DCMD_TD_MD && !(BIF_IN(BIF_SDCSR) & BIF_SDCSR_BG)) {
-	  ap_led(0xAA);
-	  printk("attempt to dma without holding the bus\n");
-	  return -1;
-  }
-#endif
-
-  /* reset the dma system */
-  DMA_OUT(ch + DMA_DMST,DMA_DMST_RST);
-
-  if (size <= DMA_MAX_TRANS_SIZE) {
-    DMA_OUT(ch + DMA_MADDR,(unsigned long)p);
-    DMA_OUT(ch + DMA_HSKIP,1);
-    DMA_OUT(ch + DMA_VSKIP,1);
-    DMA_OUT(ch + DMA_DCMD,cmd | B2W(size));
-    return 0;
-  } 
-
-  if (size <= DMA_MAX_TRANS_SIZE2) {
-    if(size & 0x3) size += 4;
-    rest = (size & (DMA_TRANS_BLOCK_SIZE - 1)) >> 2;
-    if (rest) {
-      DMA_OUT(ch + DMA_HDRP,(unsigned)p);
-      p += rest << 2;
-    }
-    DMA_OUT(ch + DMA_MADDR,(unsigned)p);
-    DMA_OUT(ch + DMA_HSKIP,size >> (2 + 6));
-    DMA_OUT(ch + DMA_VSKIP,1);
-    DMA_OUT(ch + DMA_DCMD,cmd | (rest << 16) | 64);
-    return 0;
-  }
-
-  printk("AP1000 DMA operation too big (%d bytes) - aborting\n",size);
-  return(-1);
-}
-