summaryrefslogtreecommitdiffstats
path: root/arch/sh/include/asm/dma-sh.h
blob: e934a2e666517ce4dae593928c9791516362efa1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
/*
 * arch/sh/include/asm/dma-sh.h
 *
 * Copyright (C) 2000  Takashi YOSHII
 * Copyright (C) 2003  Paul Mundt
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 */
#ifndef __DMA_SH_H
#define __DMA_SH_H

#include <asm/dma.h>
#include <cpu/dma.h>

/* DMAOR contorl: The DMAOR access size is different by CPU.*/
#if defined(CONFIG_CPU_SUBTYPE_SH7723)	|| \
    defined(CONFIG_CPU_SUBTYPE_SH7724)	|| \
    defined(CONFIG_CPU_SUBTYPE_SH7780)	|| \
    defined(CONFIG_CPU_SUBTYPE_SH7785)
#define dmaor_read_reg(n) \
    (n ? __raw_readw(SH_DMAC_BASE1 + DMAOR) \
	: __raw_readw(SH_DMAC_BASE0 + DMAOR))
#define dmaor_write_reg(n, data) \
    (n ? __raw_writew(data, SH_DMAC_BASE1 + DMAOR) \
    : __raw_writew(data, SH_DMAC_BASE0 + DMAOR))
#else /* Other CPU */
#define dmaor_read_reg(n) __raw_readw(SH_DMAC_BASE0 + DMAOR)
#define dmaor_write_reg(n, data) __raw_writew(data, SH_DMAC_BASE0 + DMAOR)
#endif

static int dmte_irq_map[] __maybe_unused = {
#if (MAX_DMA_CHANNELS >= 4)
    DMTE0_IRQ,
    DMTE0_IRQ + 1,
    DMTE0_IRQ + 2,
    DMTE0_IRQ + 3,
#endif
#if (MAX_DMA_CHANNELS >= 6)
    DMTE4_IRQ,
    DMTE4_IRQ + 1,
#endif
#if (MAX_DMA_CHANNELS >= 8)
    DMTE6_IRQ,
    DMTE6_IRQ + 1,
#endif
#if (MAX_DMA_CHANNELS >= 12)
    DMTE8_IRQ,
    DMTE9_IRQ,
    DMTE10_IRQ,
    DMTE11_IRQ,
#endif
};

/* 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

/* DMAOR definitions */
#define DMAOR_AE	0x00000004
#define DMAOR_NMIF	0x00000002
#define DMAOR_DME	0x00000001

/*
 * Define the default configuration for dual address memory-memory transfer.
 * The 0x400 value represents auto-request, external->external.
 */
#define RS_DUAL	(DM_INC | SM_INC | 0x400 | TS_INDEX2VAL(XMIT_SZ_32BIT))

/* DMA base address */
static u32 dma_base_addr[] __maybe_unused = {
#if (MAX_DMA_CHANNELS >= 4)
	SH_DMAC_BASE0 + 0x00,	/* channel 0 */
	SH_DMAC_BASE0 + 0x10,
	SH_DMAC_BASE0 + 0x20,
	SH_DMAC_BASE0 + 0x30,
#endif
#if (MAX_DMA_CHANNELS >= 6)
	SH_DMAC_BASE0 + 0x50,
	SH_DMAC_BASE0 + 0x60,
#endif
#if (MAX_DMA_CHANNELS >= 8)
	SH_DMAC_BASE1 + 0x00,
	SH_DMAC_BASE1 + 0x10,
#endif
#if (MAX_DMA_CHANNELS >= 12)
	SH_DMAC_BASE1 + 0x20,
	SH_DMAC_BASE1 + 0x30,
	SH_DMAC_BASE1 + 0x50,
	SH_DMAC_BASE1 + 0x60, /* channel 11 */
#endif
};

/* DMA register */
#define SAR     0x00
#define DAR     0x04
#define TCR     0x08
#define CHCR    0x0C
#define DMAOR	0x40

/*
 * for dma engine
 *
 * SuperH DMA mode
 */
#define SHDMA_MIX_IRQ	(1 << 1)
#define SHDMA_DMAOR1	(1 << 2)
#define SHDMA_DMAE1	(1 << 3)

enum sh_dmae_slave_chan_id {
	SHDMA_SLAVE_SCIF0_TX,
	SHDMA_SLAVE_SCIF0_RX,
	SHDMA_SLAVE_SCIF1_TX,
	SHDMA_SLAVE_SCIF1_RX,
	SHDMA_SLAVE_SCIF2_TX,
	SHDMA_SLAVE_SCIF2_RX,
	SHDMA_SLAVE_SCIF3_TX,
	SHDMA_SLAVE_SCIF3_RX,
	SHDMA_SLAVE_SCIF4_TX,
	SHDMA_SLAVE_SCIF4_RX,
	SHDMA_SLAVE_SCIF5_TX,
	SHDMA_SLAVE_SCIF5_RX,
	SHDMA_SLAVE_SIUA_TX,
	SHDMA_SLAVE_SIUA_RX,
	SHDMA_SLAVE_SIUB_TX,
	SHDMA_SLAVE_SIUB_RX,
	SHDMA_SLAVE_NUMBER,	/* Must stay last */
};

struct sh_dmae_slave_config {
	enum sh_dmae_slave_chan_id	slave_id;
	dma_addr_t			addr;
	u32				chcr;
	char				mid_rid;
};

struct sh_dmae_pdata {
	unsigned int mode;
	struct sh_dmae_slave_config *config;
	int config_num;
};

struct device;

struct sh_dmae_slave {
	enum sh_dmae_slave_chan_id	slave_id; /* Set by the platform */
	struct device			*dma_dev; /* Set by the platform */
	struct sh_dmae_slave_config	*config;  /* Set by the driver */
};

#endif /* __DMA_SH_H */