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@@ -172,3 +172,47 @@ static __inline__ void release_dma_lock(unsigned long flags)
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static __inline__ void enable_dma(unsigned int dmanr)
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{
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if (dmanr<=3)
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+ dma_outb(dmanr, DMA1_MASK_REG);
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+ else
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+ dma_outb(dmanr & 3, DMA2_MASK_REG);
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+}
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+
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+static __inline__ void disable_dma(unsigned int dmanr)
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+{
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+ if (dmanr<=3)
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+ dma_outb(dmanr | 4, DMA1_MASK_REG);
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+ else
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+ dma_outb((dmanr & 3) | 4, DMA2_MASK_REG);
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+}
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+
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+/* Clear the 'DMA Pointer Flip Flop'.
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+ * Write 0 for LSB/MSB, 1 for MSB/LSB access.
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+ * Use this once to initialize the FF to a known state.
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+ * After that, keep track of it. :-)
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+ * --- In order to do that, the DMA routines below should ---
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+ * --- only be used while holding the DMA lock ! ---
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+ */
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+static __inline__ void clear_dma_ff(unsigned int dmanr)
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+{
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+ if (dmanr<=3)
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+ dma_outb(0, DMA1_CLEAR_FF_REG);
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+ else
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+ dma_outb(0, DMA2_CLEAR_FF_REG);
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+}
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+
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+/* set mode (above) for a specific DMA channel */
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+static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
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+{
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+ if (dmanr<=3)
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+ dma_outb(mode | dmanr, DMA1_MODE_REG);
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+ else
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+ dma_outb(mode | (dmanr&3), DMA2_MODE_REG);
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+}
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+
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+/* Set only the page register bits of the transfer address.
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+ * This is used for successive transfers when we know the contents of
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+ * the lower 16 bits of the DMA current address register, but a 64k boundary
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+ * may have been crossed.
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+ */
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+static __inline__ void set_dma_page(unsigned int dmanr, char pagenr)
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+{
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