1 files changed, 129 insertions, 0 deletions

diff --git a/include/asm-frv/dma.h b/include/asm-frv/dma.h
new file mode 100644
index 000000000000..d8f9a2f21521
--- /dev/null
+++ b/include/asm-frv/dma.h
@@ -0,0 +1,129 @@
+/* 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/config.h>
+#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
+ */
+struct pt_regs;
+
+typedef irqreturn_t (*dma_irq_handler_t)(int dmachan, unsigned long cstr, void *data,
+                                         struct pt_regs *regs);
+
+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 */