patch-2.1.96 linux/include/asm-arm/arch-ebsa110/dma.h

• Lines: 106
• Date: Sun Apr 12 11:42:15 1998
• Orig file: v2.1.95/linux/include/asm-arm/arch-ebsa110/dma.h
• Orig date: Tue Jan 20 16:39:42 1998

diff -u --recursive --new-file v2.1.95/linux/include/asm-arm/arch-ebsa110/dma.h linux/include/asm-arm/arch-ebsa110/dma.h
@@ -8,93 +8,22 @@
 #ifndef __ASM_ARCH_DMA_H
 #define __ASM_ARCH_DMA_H
 
-#ifdef KERNEL_ARCH_DMA
-
-static inline void arch_disable_dma (int dmanr)
-{
-    printk (dma_str, "arch_disable_dma", dmanr);
-}
-
-static inline void arch_enable_dma (int dmanr)
-{
-    printk (dma_str, "arch_enable_dma", dmanr);
-}
-
-static inline void arch_set_dma_addr (int dmanr, unsigned int addr)
-{
-    printk (dma_str, "arch_set_dma_addr", dmanr);
-}
-
-static inline void arch_set_dma_count (int dmanr, unsigned int count)
-{
-    printk (dma_str, "arch_set_dma_count", dmanr);
-}
-
-static inline void arch_set_dma_mode (int dmanr, char mode)
-{
-    printk (dma_str, "arch_set_dma_mode", dmanr);
-}
-
-static inline int arch_dma_count (int dmanr)
-{
-    printk (dma_str, "arch_dma_count", dmanr);
-    return 0;
-}
-
-#endif
-
-/* enable/disable a specific DMA channel */
-extern void enable_dma(unsigned int dmanr);
-
-static __inline__ void disable_dma(unsigned int dmanr)
-{
-    printk (dma_str, "disable_dma", dmanr);
-}
-
-/* Clear the 'DMA Pointer Flip Flop'.
- * Write 0 for LSB/MSB, 1 for MSB/LSB access.
- * Use this once to initialize the FF to a known state.
- * After that, keep track of it. :-)
- * --- In order to do that, the DMA routines below should ---
- * --- only be used while interrupts are disabled! ---
- */
-static __inline__ void clear_dma_ff(unsigned int dmanr)
-{
-    printk (dma_str, "clear_dma_ff", dmanr);
-}
-
-/* set mode (above) for a specific DMA channel */
-extern void set_dma_mode(unsigned int dmanr, char mode);
-
-/* Set only the page register bits of the transfer address.
- * This is used for successive transfers when we know the contents of
- * the lower 16 bits of the DMA current address register, but a 64k boundary
- * may have been crossed.
+/*
+ * This is the maximum DMA address that can be DMAd to.
+ * There should not be more than (0xd0000000 - 0xc0000000)
+ * bytes of RAM.
  */
-static __inline__ void set_dma_page(unsigned int dmanr, char pagenr)
-{
-    printk (dma_str, "set_dma_page", dmanr);
-}
+#define MAX_DMA_ADDRESS		0xd0000000
 
-
-/* Set transfer address & page bits for specific DMA channel.
- * Assumes dma flipflop is clear.
- */
-extern void set_dma_addr(unsigned int dmanr, unsigned int addr);
-
-/* Set transfer size for a specific DMA channel.
+/*
+ * DMA modes - we have two, IN and OUT
  */
-extern void set_dma_count(unsigned int dmanr, unsigned int count);
+typedef enum {
+	DMA_MODE_READ,
+	DMA_MODE_WRITE
+} dmamode_t;
 
-/* Get DMA residue count. After a DMA transfer, this
- * should return zero. Reading this while a DMA transfer is
- * still in progress will return unpredictable results.
- * If called before the channel has been used, it may return 1.
- * Otherwise, it returns the number of _bytes_ left to transfer.
- *
- * Assumes DMA flip-flop is clear.
- */
-extern int get_dma_residue(unsigned int dmanr);
+#define MAX_DMA_CHANNELS	8
 
 #endif /* _ASM_ARCH_DMA_H */