dmaengine: shdma: Introduce include/linux/sh_dma.h

Create a common platform data header file for the
shdma dmaengine driver. This is done by moving
common structures from sh asm/dmaengine.h to
linux/sh_dma.h. DMA registers are also copied from
sh asm/dma-register.h to make the code architecture
independent.

The sh header file asm/dmaengine.h is still kept
with the slave id enum. This allows us to keep the
old processor specific code as is and slowly move
over to slave id enums in per-processor headers.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 101 insertions, 0 deletions

diff --git a/include/linux/sh_dma.h b/include/linux/sh_dma.h
new file mode 100644
index 000000000000..cdaaff424211
--- /dev/null
+++ b/include/linux/sh_dma.h
@@ -0,0 +1,101 @@
+/*
+ * Header for the new SH dmaengine driver
+ *
+ * Copyright (C) 2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ *
+ * 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.
+ */
+#ifndef SH_DMA_H
+#define SH_DMA_H
+
+#include <linux/list.h>
+#include <linux/dmaengine.h>
+
+/* Used by slave DMA clients to request DMA to/from a specific peripheral */
+struct sh_dmae_slave {
+        unsigned int                    slave_id; /* Set by the platform */
+        struct device                   *dma_dev; /* Set by the platform */
+        struct sh_dmae_slave_config     *config;  /* Set by the driver */
+};
+
+struct sh_dmae_regs {
+        u32 sar; /* SAR / source address */
+        u32 dar; /* DAR / destination address */
+        u32 tcr; /* TCR / transfer count */
+};
+
+struct sh_desc {
+        struct sh_dmae_regs hw;
+        struct list_head node;
+        struct dma_async_tx_descriptor async_tx;
+        enum dma_data_direction direction;
+        dma_cookie_t cookie;
+        size_t partial;
+        int chunks;
+        int mark;
+};
+struct sh_dmae_slave_config {
+        unsigned int                    slave_id;
+        dma_addr_t                      addr;
+        u32                             chcr;
+        char                            mid_rid;
+};
+
+struct sh_dmae_channel {
+        unsigned int    offset;
+        unsigned int    dmars;
+        unsigned int    dmars_bit;
+};
+
+struct sh_dmae_pdata {
+        struct sh_dmae_slave_config *slave;
+        int slave_num;
+        struct sh_dmae_channel *channel;
+        int channel_num;
+        unsigned int ts_low_shift;
+        unsigned int ts_low_mask;
+        unsigned int ts_high_shift;
+        unsigned int ts_high_mask;
+        unsigned int *ts_shift;
+        int ts_shift_num;
+        u16 dmaor_init;
+};
+
+/* DMA register */
+#define SAR     0x00
+#define DAR     0x04
+#define TCR     0x08
+#define CHCR    0x0C
+#define DMAOR   0x40
+
+/* DMAOR definitions */
+#define DMAOR_AE        0x00000004
+#define DMAOR_NMIF      0x00000002
+#define DMAOR_DME       0x00000001
+
+/* Definitions for the SuperH DMAC */
+#define REQ_L   0x00000000
+#define REQ_E   0x00080000
+#define RACK_H  0x00000000
+#define RACK_L  0x00040000
+#define ACK_R   0x00000000
+#define ACK_W   0x00020000
+#define ACK_H   0x00000000
+#define ACK_L   0x00010000
+#define DM_INC  0x00004000
+#define DM_DEC  0x00008000
+#define DM_FIX  0x0000c000
+#define SM_INC  0x00001000
+#define SM_DEC  0x00002000
+#define SM_FIX  0x00003000
+#define RS_IN   0x00000200
+#define RS_OUT  0x00000300
+#define TS_BLK  0x00000040
+#define TM_BUR  0x00000020
+#define CHCR_DE 0x00000001
+#define CHCR_TE 0x00000002
+#define CHCR_IE 0x00000004
+
+#endif