Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / arch / blackfin / include / asm / bfin_dma.h

diff --git a/arch/blackfin/include/asm/bfin_dma.h b/arch/blackfin/include/asm/bfin_dma.h
new file mode 100644 (file)
index 0000000..d511207
--- /dev/null
+++ b/arch/blackfin/include/asm/bfin_dma.h
@@ -0,0 +1,91 @@
+/*
+ * bfin_dma.h - Blackfin DMA defines/structures/etc...
+ *
+ * Copyright 2004-2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#ifndef __ASM_BFIN_DMA_H__
+#define __ASM_BFIN_DMA_H__
+
+#include <linux/types.h>
+
+/* DMA_CONFIG Masks */
+#define DMAEN                  0x0001  /* DMA Channel Enable */
+#define WNR                            0x0002  /* Channel Direction (W/R*) */
+#define WDSIZE_8               0x0000  /* Transfer Word Size = 8 */
+#define WDSIZE_16              0x0004  /* Transfer Word Size = 16 */
+#define WDSIZE_32              0x0008  /* Transfer Word Size = 32 */
+#define DMA2D                  0x0010  /* DMA Mode (2D/1D*) */
+#define RESTART                        0x0020  /* DMA Buffer Clear */
+#define DI_SEL                 0x0040  /* Data Interrupt Timing Select */
+#define DI_EN                  0x0080  /* Data Interrupt Enable */
+#define NDSIZE_0               0x0000  /* Next Descriptor Size = 0 (Stop/Autobuffer) */
+#define NDSIZE_1               0x0100  /* Next Descriptor Size = 1 */
+#define NDSIZE_2               0x0200  /* Next Descriptor Size = 2 */
+#define NDSIZE_3               0x0300  /* Next Descriptor Size = 3 */
+#define NDSIZE_4               0x0400  /* Next Descriptor Size = 4 */
+#define NDSIZE_5               0x0500  /* Next Descriptor Size = 5 */
+#define NDSIZE_6               0x0600  /* Next Descriptor Size = 6 */
+#define NDSIZE_7               0x0700  /* Next Descriptor Size = 7 */
+#define NDSIZE_8               0x0800  /* Next Descriptor Size = 8 */
+#define NDSIZE_9               0x0900  /* Next Descriptor Size = 9 */
+#define NDSIZE                 0x0f00  /* Next Descriptor Size */
+#define DMAFLOW                        0x7000  /* Flow Control */
+#define DMAFLOW_STOP   0x0000  /* Stop Mode */
+#define DMAFLOW_AUTO   0x1000  /* Autobuffer Mode */
+#define DMAFLOW_ARRAY  0x4000  /* Descriptor Array Mode */
+#define DMAFLOW_SMALL  0x6000  /* Small Model Descriptor List Mode */
+#define DMAFLOW_LARGE  0x7000  /* Large Model Descriptor List Mode */
+
+/* DMA_IRQ_STATUS Masks */
+#define DMA_DONE               0x0001  /* DMA Completion Interrupt Status */
+#define DMA_ERR                        0x0002  /* DMA Error Interrupt Status */
+#define DFETCH                 0x0004  /* DMA Descriptor Fetch Indicator */
+#define DMA_RUN                        0x0008  /* DMA Channel Running Indicator */
+
+/*
+ * All Blackfin system MMRs are padded to 32bits even if the register
+ * itself is only 16bits.  So use a helper macro to streamline this.
+ */
+#define __BFP(m) u16 m; u16 __pad_##m
+
+/*
+ * bfin dma registers layout
+ */
+struct bfin_dma_regs {
+       u32 next_desc_ptr;
+       u32 start_addr;
+       __BFP(config);
+       u32 __pad0;
+       __BFP(x_count);
+       __BFP(x_modify);
+       __BFP(y_count);
+       __BFP(y_modify);
+       u32 curr_desc_ptr;
+       u32 curr_addr;
+       __BFP(irq_status);
+       __BFP(peripheral_map);
+       __BFP(curr_x_count);
+       u32 __pad1;
+       __BFP(curr_y_count);
+       u32 __pad2;
+};
+
+/*
+ * bfin handshake mdma registers layout
+ */
+struct bfin_hmdma_regs {
+       __BFP(control);
+       __BFP(ecinit);
+       __BFP(bcinit);
+       __BFP(ecurgent);
+       __BFP(ecoverflow);
+       __BFP(ecount);
+       __BFP(bcount);
+};
+
+#undef __BFP
+
+#endif