1 /* SPDX-License-Identifier: GPL-2.0 */ 1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* 2 /*
3 * OF helpers for DMA request / controller 3 * OF helpers for DMA request / controller
4 * 4 *
5 * Based on of_gpio.h 5 * Based on of_gpio.h
6 * 6 *
7 * Copyright (C) 2012 Texas Instruments Incorp 7 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
8 */ 8 */
9 9
10 #ifndef __LINUX_OF_DMA_H 10 #ifndef __LINUX_OF_DMA_H
11 #define __LINUX_OF_DMA_H 11 #define __LINUX_OF_DMA_H
12 12
13 #include <linux/of.h> 13 #include <linux/of.h>
14 #include <linux/dmaengine.h> 14 #include <linux/dmaengine.h>
15 15
16 struct device_node; 16 struct device_node;
17 17
18 struct of_dma { 18 struct of_dma {
19 struct list_head of_dma_control 19 struct list_head of_dma_controllers;
20 struct device_node *of_node; 20 struct device_node *of_node;
21 struct dma_chan *(*of_dma_xlat 21 struct dma_chan *(*of_dma_xlate)
22 (struct of_pha 22 (struct of_phandle_args *, struct of_dma *);
23 void *(*of_dma_rout 23 void *(*of_dma_route_allocate)
24 (struct of_pha 24 (struct of_phandle_args *, struct of_dma *);
25 struct dma_router *dma_router; 25 struct dma_router *dma_router;
26 void *of_dma_data; 26 void *of_dma_data;
27 }; 27 };
28 28
29 struct of_dma_filter_info { 29 struct of_dma_filter_info {
30 dma_cap_mask_t dma_cap; 30 dma_cap_mask_t dma_cap;
31 dma_filter_fn filter_fn; 31 dma_filter_fn filter_fn;
32 }; 32 };
33 33
34 #ifdef CONFIG_DMA_OF 34 #ifdef CONFIG_DMA_OF
35 extern int of_dma_controller_register(struct d 35 extern int of_dma_controller_register(struct device_node *np,
36 struct dma_chan *(*of_dma_xlat 36 struct dma_chan *(*of_dma_xlate)
37 (struct of_phandle_args *, str 37 (struct of_phandle_args *, struct of_dma *),
38 void *data); 38 void *data);
39 extern void of_dma_controller_free(struct devi 39 extern void of_dma_controller_free(struct device_node *np);
40 40
41 extern int of_dma_router_register(struct devic 41 extern int of_dma_router_register(struct device_node *np,
42 void *(*of_dma_route_allocate) 42 void *(*of_dma_route_allocate)
43 (struct of_phandle_args *, str 43 (struct of_phandle_args *, struct of_dma *),
44 struct dma_router *dma_router) 44 struct dma_router *dma_router);
45 #define of_dma_router_free of_dma_controller_f 45 #define of_dma_router_free of_dma_controller_free
46 46
47 extern struct dma_chan *of_dma_request_slave_c 47 extern struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
48 48 const char *name);
49 extern struct dma_chan *of_dma_simple_xlate(st 49 extern struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
50 struct of_dma *ofdma); 50 struct of_dma *ofdma);
51 extern struct dma_chan *of_dma_xlate_by_chan_i 51 extern struct dma_chan *of_dma_xlate_by_chan_id(struct of_phandle_args *dma_spec,
52 struct of_dma *ofdma); 52 struct of_dma *ofdma);
53 53
54 #else 54 #else
55 static inline int of_dma_controller_register(s 55 static inline int of_dma_controller_register(struct device_node *np,
56 struct dma_chan *(*of_dma_xlat 56 struct dma_chan *(*of_dma_xlate)
57 (struct of_phandle_args *, str 57 (struct of_phandle_args *, struct of_dma *),
58 void *data) 58 void *data)
59 { 59 {
60 return -ENODEV; 60 return -ENODEV;
61 } 61 }
62 62
63 static inline void of_dma_controller_free(stru 63 static inline void of_dma_controller_free(struct device_node *np)
64 { 64 {
65 } 65 }
66 66
67 static inline int of_dma_router_register(struc 67 static inline int of_dma_router_register(struct device_node *np,
68 void *(*of_dma_route_allocate) 68 void *(*of_dma_route_allocate)
69 (struct of_phandle_args *, str 69 (struct of_phandle_args *, struct of_dma *),
70 struct dma_router *dma_router) 70 struct dma_router *dma_router)
71 { 71 {
72 return -ENODEV; 72 return -ENODEV;
73 } 73 }
74 74
75 #define of_dma_router_free of_dma_controller_f 75 #define of_dma_router_free of_dma_controller_free
76 76
77 static inline struct dma_chan *of_dma_request_ 77 static inline struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
78 78 const char *name)
79 { 79 {
80 return ERR_PTR(-ENODEV); 80 return ERR_PTR(-ENODEV);
81 } 81 }
82 82
83 static inline struct dma_chan *of_dma_simple_x 83 static inline struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
84 struct of_dma *ofdma) 84 struct of_dma *ofdma)
85 { 85 {
86 return NULL; 86 return NULL;
87 } 87 }
88 88
89 #define of_dma_xlate_by_chan_id NULL 89 #define of_dma_xlate_by_chan_id NULL
90 90
91 #endif 91 #endif
92 92
93 #endif /* __LINUX_OF_DMA_H */ 93 #endif /* __LINUX_OF_DMA_H */
94 94
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