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

• Lines: 125
• Date: Sun Apr 12 11:42:15 1998
• Orig file: v2.1.95/linux/include/asm-arm/arch-arc/dma.h
• Orig date: Tue Jan 20 16:39:42 1998

diff -u --recursive --new-file v2.1.95/linux/include/asm-arm/arch-arc/dma.h linux/include/asm-arm/arch-arc/dma.h
@@ -1,95 +1,38 @@
+/*
+ * linux/include/asm-arm/arch-arc/dma.h
+ *
+ * Copyright (C) 1996-1998 Russell King
+ *
+ * Acorn Archimedes/A5000 architecture virtual DMA
+ * implementation
+ *
+ * Modifications:
+ *  04-04-1998	RMK	Merged arc and a5k versions
+ */
 #ifndef __ASM_ARCH_DMA_H
 #define __ASM_ARCH_DMA_H
 
-#define MAX_DMA_ADDRESS		0x03000000
-
-#ifdef KERNEL_ARCH_DMA
+#include <linux/config.h>
 
-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)
-{
-    switch(dmanr) {
-    case 0:  disable_irq(64); break;
-    case 1:  break;
-    default: printk (dma_str, "disable_dma", dmanr); break;
-    }
-}
-
-/* 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! ---
- */
-#define 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.
- */
-static __inline__ void set_dma_page(unsigned int dmanr, char pagenr)
-{
-    printk (dma_str, "set_dma_page", dmanr);
-}
-
-
-/* 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);
+#define MAX_DMA_ADDRESS		0x03000000
 
-/* 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;
+
+#define MAX_DMA_CHANNELS	4
+
+#define DMA_0			0
+#define DMA_1			1
+#define DMA_VIRTUAL_FLOPPY	2
+#define DMA_VIRTUAL_SOUND	3
 
-/* 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);
+#ifdef CONFIG_ARCH_A5K
+#define DMA_FLOPPY		DMA_VIRTUAL_FLOPPY
+#endif
 
 #endif /* _ASM_ARCH_DMA_H */