patch-2.1.96 linux/arch/arm/kernel/dma-a5k.c

• Lines: 80
• Date: Sun Apr 12 11:42:15 1998
• Orig file: v2.1.95/linux/arch/arm/kernel/dma-a5k.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.95/linux/arch/arm/kernel/dma-a5k.c linux/arch/arm/kernel/dma-a5k.c
@@ -0,0 +1,79 @@
+/*
+ * arch/arm/kernel/dma-a5k.c
+ *
+ * Copyright (C) 1998 Russell King
+ *
+ * DMA functions specific to A5000 architecture
+ */
+#include <linux/sched.h>
+#include <linux/init.h>
+
+#include <asm/dma.h>
+#include <asm/io.h>
+#include <asm/hardware.h>
+
+#include "dma.h"
+
+int arch_request_dma(dmach_t channel, dma_t *dma)
+{
+	if (channel == DMA_VIRTUAL_FLOPPY0)
+		return 0;
+	else
+		return -EINVAL;
+}
+
+void arch_free_dma(dmach_t channel, dma_t *dma)
+{
+	if (channel != DMA_VIRTUAL_FLOPPY0)
+		printk ("arch_free_dma: invalid channel %d\n", channel);
+}
+
+int arch_get_dma_residue(dmach_t channel, dma_t *dma)
+{
+	if (channel != DMA_VIRTUAL_FLOPPY0)
+		printk ("arch_dma_count: invalid channel %d\n", dmanr);
+	else {
+		extern int floppy_fiqresidual(void);
+		return floppy_fiqresidual();
+	}
+	return 0;
+}
+
+void arch_enable_dma(dmach_t channel, dma_t *dma)
+{
+	if (channel != DMA_VIRTUAL_FLOPPY0)
+		printk ("arch_enable_dma: invalid channel %d\n", channel);
+	else {
+		void *fiqhandler_start;
+		unsigned int fiqhandler_length;
+		extern void floppy_fiqsetup (unsigned long len, unsigned long addr,
+					     unsigned long port);
+
+		if (dma->dma_mode == DMA_MODE_READ) {
+			extern unsigned char floppy_fiqin_start, floppy_fiqin_end;
+			fiqhandler_start = &floppy_fiqin_start;
+			fiqhandler_length = &floppy_fiqin_end - &floppy_fiqin_start;
+		} else {
+			extern unsigned char floppy_fiqout_start, floppy_fiqout_end;
+			fiqhandler_start = &floppy_fiqout_start;
+			fiqhandler_length = &floppy_fiqout_end - &floppy_fiqout_start;
+		}
+		memcpy ((void *)0x1c, fiqhandler_start, fiqhandler_length);
+		flush_page_to_ram(0);
+		floppy_fiqsetup (dma->buf.length, __bus_to_virt(dma->buf.address), (int)PCIO_FLOPPYDMABASE);
+		enable_irq (dma->dma_irq);
+	}
+}
+
+void arch_disable_dma(dmach_t channel, dma_t *dma)
+{
+	if (channel != DMA_VIRTUAL_FLOPPY0)
+		printk ("arch_disable_dma: invalid channel %d\n", channel);
+	else
+		disable_irq (dma->dma_irq);
+}
+
+__initfunc(void arch_dma_init(dma_t *dma))
+{
+	dma[DMA_VIRTUAL_FLOPPY0].dma_irq = 64;
+}