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>
diff --git a/include/linux/sh_dma.h b/include/linux/sh_dma.h
new file mode 100644
index 0000000..cdaaff4
--- /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