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16#ifndef SHDMA_BASE_H
17#define SHDMA_BASE_H
18
19#include <linux/dmaengine.h>
20#include <linux/interrupt.h>
21#include <linux/list.h>
22#include <linux/types.h>
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31enum shdma_pm_state {
32 SHDMA_PM_ESTABLISHED,
33 SHDMA_PM_BUSY,
34 SHDMA_PM_PENDING,
35};
36
37struct device;
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45struct shdma_slave {
46 int slave_id;
47};
48
49struct shdma_desc {
50 struct list_head node;
51 struct dma_async_tx_descriptor async_tx;
52 enum dma_transfer_direction direction;
53 size_t partial;
54 dma_cookie_t cookie;
55 int chunks;
56 int mark;
57};
58
59struct shdma_chan {
60 spinlock_t chan_lock;
61 struct list_head ld_queue;
62 struct list_head ld_free;
63 struct dma_chan dma_chan;
64 struct device *dev;
65 void *desc;
66 int desc_num;
67 size_t max_xfer_len;
68 int id;
69 int irq;
70 int slave_id;
71 enum shdma_pm_state pm_state;
72};
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90struct shdma_ops {
91 bool (*desc_completed)(struct shdma_chan *, struct shdma_desc *);
92 void (*halt_channel)(struct shdma_chan *);
93 bool (*channel_busy)(struct shdma_chan *);
94 dma_addr_t (*slave_addr)(struct shdma_chan *);
95 int (*desc_setup)(struct shdma_chan *, struct shdma_desc *,
96 dma_addr_t, dma_addr_t, size_t *);
97 int (*set_slave)(struct shdma_chan *, int, bool);
98 void (*setup_xfer)(struct shdma_chan *, int);
99 void (*start_xfer)(struct shdma_chan *, struct shdma_desc *);
100 struct shdma_desc *(*embedded_desc)(void *, int);
101 bool (*chan_irq)(struct shdma_chan *, int);
102 size_t (*get_partial)(struct shdma_chan *, struct shdma_desc *);
103};
104
105struct shdma_dev {
106 struct dma_device dma_dev;
107 struct shdma_chan **schan;
108 const struct shdma_ops *ops;
109 size_t desc_size;
110};
111
112#define shdma_for_each_chan(c, d, i) for (i = 0, c = (d)->schan[0]; \
113 i < (d)->dma_dev.chancnt; c = (d)->schan[++i])
114
115int shdma_request_irq(struct shdma_chan *, int,
116 unsigned long, const char *);
117void shdma_free_irq(struct shdma_chan *);
118bool shdma_reset(struct shdma_dev *sdev);
119void shdma_chan_probe(struct shdma_dev *sdev,
120 struct shdma_chan *schan, int id);
121void shdma_chan_remove(struct shdma_chan *schan);
122int shdma_init(struct device *dev, struct shdma_dev *sdev,
123 int chan_num);
124void shdma_cleanup(struct shdma_dev *sdev);
125
126#endif
127