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/arch/sh/include/asm/dmaengine.h b/arch/sh/include/asm/dmaengine.h
index abb8d66..2a02b61 100644 (file)
--- a/arch/sh/include/asm/dmaengine.h
+++ b/arch/sh/include/asm/dmaengine.h
@@ -10,12 +10,7 @@
 #ifndef ASM_DMAENGINE_H
 #define ASM_DMAENGINE_H
 
-#include <linux/dmaengine.h>
-#include <linux/list.h>
-
-#include <asm/dma-register.h>
-
-#define SH_DMAC_MAX_CHANNELS   6
+#include <linux/sh_dma.h>
 
 enum {
        SHDMA_SLAVE_SCIF0_TX,
@@ -36,57 +31,4 @@ enum {
        SHDMA_SLAVE_SIUB_RX,
 };
 
-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;
-};
-
-struct device;
-
-/* 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;
-};
-
 #endif

diff --git a/drivers/dma/shdma.c b/drivers/dma/shdma.c
index 8360538..7a18b58 100644 (file)
--- a/drivers/dma/shdma.c
+++ b/drivers/dma/shdma.c
@@ -25,8 +25,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
-
-#include <asm/dmaengine.h>
+#include <linux/sh_dma.h>
 
 #include "shdma.h"
 

diff --git a/drivers/dma/shdma.h b/drivers/dma/shdma.h
index d7ddf6f..4021275 100644 (file)
--- a/drivers/dma/shdma.h
+++ b/drivers/dma/shdma.h
@@ -17,8 +17,7 @@
 #include <linux/interrupt.h>
 #include <linux/list.h>
 
-#include <asm/dmaengine.h>
-
+#define SH_DMAC_MAX_CHANNELS 6
 #define SH_DMA_SLAVE_NUMBER 256
 #define SH_DMA_TCR_MAX 0x00FFFFFF      /* 16MB */
 

diff --git a/include/linux/sh_dma.h b/include/linux/sh_dma.h
new file mode 100644 (file)
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