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1/*
2 * include/asm-sh/dma.h
3 *
4 * Copyright (C) 2003, 2004 Paul Mundt
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 */
10#ifndef __ASM_SH_DMA_H
11#define __ASM_SH_DMA_H
12#ifdef __KERNEL__
13
14#include <linux/spinlock.h>
15#include <linux/wait.h>
16#include <linux/sched.h>
17#include <linux/device.h>
18#include <asm-generic/dma.h>
19
20/*
21 * Read and write modes can mean drastically different things depending on the
22 * channel configuration. Consult your DMAC documentation and module
23 * implementation for further clues.
24 */
25#define DMA_MODE_READ 0x00
26#define DMA_MODE_WRITE 0x01
27#define DMA_MODE_MASK 0x01
28
29#define DMA_AUTOINIT 0x10
30
31/*
32 * DMAC (dma_info) flags
33 */
34enum {
35 DMAC_CHANNELS_CONFIGURED = 0x01,
36 DMAC_CHANNELS_TEI_CAPABLE = 0x02, /* Transfer end interrupt */
37};
38
39/*
40 * DMA channel capabilities / flags
41 */
42enum {
43 DMA_CONFIGURED = 0x01,
44
45 /*
46 * Transfer end interrupt, inherited from DMAC.
47 * wait_queue used in dma_wait_for_completion.
48 */
49 DMA_TEI_CAPABLE = 0x02,
50};
51
52extern spinlock_t dma_spin_lock;
53
54struct dma_channel;
55
56struct dma_ops {
57 int (*request)(struct dma_channel *chan);
58 void (*free)(struct dma_channel *chan);
59
60 int (*get_residue)(struct dma_channel *chan);
61 int (*xfer)(struct dma_channel *chan);
62 int (*configure)(struct dma_channel *chan, unsigned long flags);
63 int (*extend)(struct dma_channel *chan, unsigned long op, void *param);
64};
65
66struct dma_channel {
67 char dev_id[16]; /* unique name per DMAC of channel */
68
69 unsigned int chan; /* DMAC channel number */
70 unsigned int vchan; /* Virtual channel number */
71
72 unsigned int mode;
73 unsigned int count;
74
75 unsigned long sar;
76 unsigned long dar;
77
78 const char **caps;
79
80 unsigned long flags;
81 atomic_t busy;
82
83 wait_queue_head_t wait_queue;
84
85 struct device dev;
86 void *priv_data;
87};
88
89struct dma_info {
90 struct platform_device *pdev;
91
92 const char *name;
93 unsigned int nr_channels;
94 unsigned long flags;
95
96 struct dma_ops *ops;
97 struct dma_channel *channels;
98
99 struct list_head list;
100 int first_channel_nr;
101 int first_vchannel_nr;
102};
103
104struct dma_chan_caps {
105 int ch_num;
106 const char **caplist;
107};
108
109#define to_dma_channel(channel) container_of(channel, struct dma_channel, dev)
110
111/* arch/sh/drivers/dma/dma-api.c */
112extern int dma_xfer(unsigned int chan, unsigned long from,
113 unsigned long to, size_t size, unsigned int mode);
114
115#define dma_write(chan, from, to, size) \
116 dma_xfer(chan, from, to, size, DMA_MODE_WRITE)
117#define dma_write_page(chan, from, to) \
118 dma_write(chan, from, to, PAGE_SIZE)
119
120#define dma_read(chan, from, to, size) \
121 dma_xfer(chan, from, to, size, DMA_MODE_READ)
122#define dma_read_page(chan, from, to) \
123 dma_read(chan, from, to, PAGE_SIZE)
124
125extern int request_dma_bycap(const char **dmac, const char **caps,
126 const char *dev_id);
127extern int get_dma_residue(unsigned int chan);
128extern struct dma_info *get_dma_info(unsigned int chan);
129extern struct dma_channel *get_dma_channel(unsigned int chan);
130extern void dma_wait_for_completion(unsigned int chan);
131extern void dma_configure_channel(unsigned int chan, unsigned long flags);
132
133extern int register_dmac(struct dma_info *info);
134extern void unregister_dmac(struct dma_info *info);
135extern struct dma_info *get_dma_info_by_name(const char *dmac_name);
136
137extern int dma_extend(unsigned int chan, unsigned long op, void *param);
138extern int register_chan_caps(const char *dmac, struct dma_chan_caps *capslist);
139
140/* arch/sh/drivers/dma/dma-sysfs.c */
141extern int dma_create_sysfs_files(struct dma_channel *, struct dma_info *);
142extern void dma_remove_sysfs_files(struct dma_channel *, struct dma_info *);
143
144#ifdef CONFIG_PCI
145extern int isa_dma_bridge_buggy;
146#else
147#define isa_dma_bridge_buggy (0)
148#endif
149
150#endif /* __KERNEL__ */
151#endif /* __ASM_SH_DMA_H */
1/* SPDX-License-Identifier: GPL-2.0
2 *
3 * include/asm-sh/dma.h
4 *
5 * Copyright (C) 2003, 2004 Paul Mundt
6 */
7#ifndef __ASM_SH_DMA_H
8#define __ASM_SH_DMA_H
9
10#include <linux/spinlock.h>
11#include <linux/wait.h>
12#include <linux/sched.h>
13#include <linux/device.h>
14#include <asm-generic/dma.h>
15
16/*
17 * Read and write modes can mean drastically different things depending on the
18 * channel configuration. Consult your DMAC documentation and module
19 * implementation for further clues.
20 */
21#define DMA_MODE_READ 0x00
22#define DMA_MODE_WRITE 0x01
23#define DMA_MODE_MASK 0x01
24
25#define DMA_AUTOINIT 0x10
26
27/*
28 * DMAC (dma_info) flags
29 */
30enum {
31 DMAC_CHANNELS_CONFIGURED = 0x01,
32 DMAC_CHANNELS_TEI_CAPABLE = 0x02, /* Transfer end interrupt */
33};
34
35/*
36 * DMA channel capabilities / flags
37 */
38enum {
39 DMA_CONFIGURED = 0x01,
40
41 /*
42 * Transfer end interrupt, inherited from DMAC.
43 * wait_queue used in dma_wait_for_completion.
44 */
45 DMA_TEI_CAPABLE = 0x02,
46};
47
48extern spinlock_t dma_spin_lock;
49
50struct dma_channel;
51
52struct dma_ops {
53 int (*request)(struct dma_channel *chan);
54 void (*free)(struct dma_channel *chan);
55
56 int (*get_residue)(struct dma_channel *chan);
57 int (*xfer)(struct dma_channel *chan);
58 int (*configure)(struct dma_channel *chan, unsigned long flags);
59 int (*extend)(struct dma_channel *chan, unsigned long op, void *param);
60};
61
62struct dma_channel {
63 char dev_id[16]; /* unique name per DMAC of channel */
64
65 unsigned int chan; /* DMAC channel number */
66 unsigned int vchan; /* Virtual channel number */
67
68 unsigned int mode;
69 unsigned int count;
70
71 unsigned long sar;
72 unsigned long dar;
73
74 const char **caps;
75
76 unsigned long flags;
77 atomic_t busy;
78
79 wait_queue_head_t wait_queue;
80
81 struct device dev;
82 void *priv_data;
83};
84
85struct dma_info {
86 struct platform_device *pdev;
87
88 const char *name;
89 unsigned int nr_channels;
90 unsigned long flags;
91
92 struct dma_ops *ops;
93 struct dma_channel *channels;
94
95 struct list_head list;
96 int first_channel_nr;
97 int first_vchannel_nr;
98};
99
100struct dma_chan_caps {
101 int ch_num;
102 const char **caplist;
103};
104
105#define to_dma_channel(channel) container_of(channel, struct dma_channel, dev)
106
107/* arch/sh/drivers/dma/dma-api.c */
108extern int dma_xfer(unsigned int chan, unsigned long from,
109 unsigned long to, size_t size, unsigned int mode);
110
111#define dma_write(chan, from, to, size) \
112 dma_xfer(chan, from, to, size, DMA_MODE_WRITE)
113#define dma_write_page(chan, from, to) \
114 dma_write(chan, from, to, PAGE_SIZE)
115
116#define dma_read(chan, from, to, size) \
117 dma_xfer(chan, from, to, size, DMA_MODE_READ)
118#define dma_read_page(chan, from, to) \
119 dma_read(chan, from, to, PAGE_SIZE)
120
121extern int request_dma_bycap(const char **dmac, const char **caps,
122 const char *dev_id);
123extern int get_dma_residue(unsigned int chan);
124extern struct dma_info *get_dma_info(unsigned int chan);
125extern struct dma_channel *get_dma_channel(unsigned int chan);
126extern void dma_wait_for_completion(unsigned int chan);
127extern void dma_configure_channel(unsigned int chan, unsigned long flags);
128
129extern int register_dmac(struct dma_info *info);
130extern void unregister_dmac(struct dma_info *info);
131extern struct dma_info *get_dma_info_by_name(const char *dmac_name);
132
133extern int dma_extend(unsigned int chan, unsigned long op, void *param);
134extern int register_chan_caps(const char *dmac, struct dma_chan_caps *capslist);
135
136/* arch/sh/drivers/dma/dma-sysfs.c */
137extern int dma_create_sysfs_files(struct dma_channel *, struct dma_info *);
138extern void dma_remove_sysfs_files(struct dma_channel *, struct dma_info *);
139
140#ifdef CONFIG_PCI
141extern int isa_dma_bridge_buggy;
142#else
143#define isa_dma_bridge_buggy (0)
144#endif
145
146#endif /* __ASM_SH_DMA_H */