1 files changed, 125 insertions, 0 deletions
diff --git a/kernel/arch/frv/include/asm/dma.h b/kernel/arch/frv/include/asm/dma.h
new file mode 100644
index 000000000..683c47d48
--- /dev/null
+++ b/kernel/arch/frv/include/asm/dma.h
@@ -0,0 +1,125 @@
+/* dma.h: FRV DMA controller management
+ *
+ * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _ASM_DMA_H
+#define _ASM_DMA_H
+
+//#define DMA_DEBUG 1
+
+#include <linux/interrupt.h>
+
+#undef MAX_DMA_CHANNELS		/* don't use kernel/dma.c */
+
+/* under 2.4 this is actually needed by the new bootmem allocator */
+#define MAX_DMA_ADDRESS		PAGE_OFFSET
+
+/*
+ * FRV DMA controller management
+ */
+typedef irqreturn_t (*dma_irq_handler_t)(int dmachan, unsigned long cstr, void *data);
+
+extern void frv_dma_init(void);
+
+extern int frv_dma_open(const char *devname,
+			unsigned long dmamask,
+			int dmacap,
+			dma_irq_handler_t handler,
+			unsigned long irq_flags,
+			void *data);
+
+/* channels required */
+#define FRV_DMA_MASK_ANY	ULONG_MAX	/* any channel */
+
+/* capabilities required */
+#define FRV_DMA_CAP_DREQ	0x01		/* DMA request pin */
+#define FRV_DMA_CAP_DACK	0x02		/* DMA ACK pin */
+#define FRV_DMA_CAP_DONE	0x04		/* DMA done pin */
+
+extern void frv_dma_close(int dma);
+
+extern void frv_dma_config(int dma, unsigned long ccfr, unsigned long cctr, unsigned long apr);
+
+extern void frv_dma_start(int dma,
+			  unsigned long sba, unsigned long dba,
+			  unsigned long pix, unsigned long six, unsigned long bcl);
+
+extern void frv_dma_restart_circular(int dma, unsigned long six);
+
+extern void frv_dma_stop(int dma);
+
+extern int is_frv_dma_interrupting(int dma);
+
+extern void frv_dma_dump(int dma);
+
+extern void frv_dma_status_clear(int dma);
+
+#define FRV_DMA_NCHANS	8
+#define FRV_DMA_4CHANS	4
+#define FRV_DMA_8CHANS	8
+
+#define DMAC_CCFRx		0x00	/* channel configuration reg */
+#define DMAC_CCFRx_CM_SHIFT	16
+#define DMAC_CCFRx_CM_DA	0x00000000
+#define DMAC_CCFRx_CM_SCA	0x00010000
+#define DMAC_CCFRx_CM_DCA	0x00020000
+#define DMAC_CCFRx_CM_2D	0x00030000
+#define DMAC_CCFRx_ATS_SHIFT	8
+#define DMAC_CCFRx_RS_INTERN	0x00000000
+#define DMAC_CCFRx_RS_EXTERN	0x00000001
+#define DMAC_CCFRx_RS_SHIFT	0
+
+#define DMAC_CSTRx		0x08	/* channel status reg */
+#define DMAC_CSTRx_FS		0x0000003f
+#define DMAC_CSTRx_NE		0x00000100
+#define DMAC_CSTRx_FED		0x00000200
+#define DMAC_CSTRx_WER		0x00000800
+#define DMAC_CSTRx_RER		0x00001000
+#define DMAC_CSTRx_CE		0x00002000
+#define DMAC_CSTRx_INT		0x00800000
+#define DMAC_CSTRx_BUSY		0x80000000
+
+#define DMAC_CCTRx		0x10	/* channel control reg */
+#define DMAC_CCTRx_DSIZ_1	0x00000000
+#define DMAC_CCTRx_DSIZ_2	0x00000001
+#define DMAC_CCTRx_DSIZ_4	0x00000002
+#define DMAC_CCTRx_DSIZ_32	0x00000005
+#define DMAC_CCTRx_DAU_HOLD	0x00000000
+#define DMAC_CCTRx_DAU_INC	0x00000010
+#define DMAC_CCTRx_DAU_DEC	0x00000020
+#define DMAC_CCTRx_SSIZ_1	0x00000000
+#define DMAC_CCTRx_SSIZ_2	0x00000100
+#define DMAC_CCTRx_SSIZ_4	0x00000200
+#define DMAC_CCTRx_SSIZ_32	0x00000500
+#define DMAC_CCTRx_SAU_HOLD	0x00000000
+#define DMAC_CCTRx_SAU_INC	0x00001000
+#define DMAC_CCTRx_SAU_DEC	0x00002000
+#define DMAC_CCTRx_FC		0x08000000
+#define DMAC_CCTRx_ICE		0x10000000
+#define DMAC_CCTRx_IE		0x40000000
+#define DMAC_CCTRx_ACT		0x80000000
+
+#define DMAC_SBAx		0x18	/* source base address reg */
+#define DMAC_DBAx		0x20	/* data base address reg */
+#define DMAC_PIXx		0x28	/* primary index reg */
+#define DMAC_SIXx		0x30	/* secondary index reg */
+#define DMAC_BCLx		0x38	/* byte count limit reg */
+#define DMAC_APRx		0x40	/* alternate pointer reg */
+
+/*
+ * required for PCI + MODULES
+ */
+#ifdef CONFIG_PCI
+extern int isa_dma_bridge_buggy;
+#else
+#define isa_dma_bridge_buggy 	(0)
+#endif
+
+#endif /* _ASM_DMA_H */