patch-2.4.4 linux/arch/arm/mach-sa1100/dma.h

• Lines: 57
• Date: Thu Apr 12 12:20:31 2001
• Orig file: v2.4.3/linux/arch/arm/mach-sa1100/dma.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.3/linux/arch/arm/mach-sa1100/dma.h linux/arch/arm/mach-sa1100/dma.h
@@ -0,0 +1,56 @@
+/*
+ * Definitions shared between dma-sa1100.c and dma-sa1111.c
+ * (C) 2000 Nicolas Pitre <nico@cam.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+
+/*
+ * DMA channel structure.
+ */
+
+typedef struct dma_buf_s dma_buf_t;
+
+typedef struct {
+	unsigned int lock;      /* Device is allocated */
+	const char *device_id;  /* Device name */
+	dma_buf_t *head;        /* where to insert buffers */
+	dma_buf_t *tail;        /* where to remove buffers */
+	dma_buf_t *curr;        /* buffer currently DMA'ed */
+	int ready;              /* 1 if DMA can occur */
+	int active;             /* 1 if DMA is actually processing data */
+	dma_regs_t *regs;       /* points to appropriate DMA registers */
+	int irq;                /* IRQ used by the channel */
+	dma_callback_t callback;        /* ... to call when buffers are done */
+	int spin_size;          /* > 0 when DMA should spin when no more buffer */
+	dma_addr_t spin_addr;   /* DMA address to spin onto */
+	int spin_ref;           /* number of spinning references */
+#ifdef CONFIG_SA1111
+	int dma_a, dma_b, last_dma;	/* SA-1111 specific */
+#endif
+} sa1100_dma_t;
+
+extern sa1100_dma_t dma_chan[MAX_SA1100_DMA_CHANNELS];
+
+
+int start_sa1111_sac_dma(sa1100_dma_t *dma, dma_addr_t dma_ptr, size_t size);
+int sa1111_dma_get_current(dmach_t channel, void **buf_id, dma_addr_t *addr);
+int sa1111_dma_stop(dmach_t channel);
+int sa1111_dma_resume(dmach_t channel);
+void sa1111_reset_sac_dma(dmach_t channel);
+void sa1111_cleanup_sac_dma(dmach_t channel);
+
+void sa1100_dma_done (sa1100_dma_t *dma);
+
+
+#ifdef CONFIG_SA1111
+#define channel_is_sa1111_sac(ch) \
+	((ch) >= SA1111_SAC_DMA_BASE && \
+	 (ch) <  SA1111_SAC_DMA_BASE + SA1111_SAC_DMA_CHANNELS)
+#else
+#define channel_is_sa1111_sac(ch) (0)
+#endif
+