1 /* SPDX-License-Identifier: GPL-2.0 */ <<
2 /* 1 /*
3 * OF helpers for DMA request / controller 2 * OF helpers for DMA request / controller
4 * 3 *
5 * Based on of_gpio.h 4 * Based on of_gpio.h
6 * 5 *
7 * Copyright (C) 2012 Texas Instruments Incorp 6 * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
>> 7 *
>> 8 * This program is free software; you can redistribute it and/or modify
>> 9 * it under the terms of the GNU General Public License version 2 as
>> 10 * published by the Free Software Foundation.
8 */ 11 */
9 12
10 #ifndef __LINUX_OF_DMA_H 13 #ifndef __LINUX_OF_DMA_H
11 #define __LINUX_OF_DMA_H 14 #define __LINUX_OF_DMA_H
12 15
13 #include <linux/of.h> 16 #include <linux/of.h>
14 #include <linux/dmaengine.h> 17 #include <linux/dmaengine.h>
15 18
16 struct device_node; 19 struct device_node;
17 20
18 struct of_dma { 21 struct of_dma {
19 struct list_head of_dma_control 22 struct list_head of_dma_controllers;
20 struct device_node *of_node; 23 struct device_node *of_node;
21 struct dma_chan *(*of_dma_xlat 24 struct dma_chan *(*of_dma_xlate)
22 (struct of_pha 25 (struct of_phandle_args *, struct of_dma *);
23 void *(*of_dma_rout 26 void *(*of_dma_route_allocate)
24 (struct of_pha 27 (struct of_phandle_args *, struct of_dma *);
25 struct dma_router *dma_router; 28 struct dma_router *dma_router;
26 void *of_dma_data; 29 void *of_dma_data;
27 }; 30 };
28 31
29 struct of_dma_filter_info { 32 struct of_dma_filter_info {
30 dma_cap_mask_t dma_cap; 33 dma_cap_mask_t dma_cap;
31 dma_filter_fn filter_fn; 34 dma_filter_fn filter_fn;
32 }; 35 };
33 36
34 #ifdef CONFIG_DMA_OF 37 #ifdef CONFIG_DMA_OF
35 extern int of_dma_controller_register(struct d 38 extern int of_dma_controller_register(struct device_node *np,
36 struct dma_chan *(*of_dma_xlat 39 struct dma_chan *(*of_dma_xlate)
37 (struct of_phandle_args *, str 40 (struct of_phandle_args *, struct of_dma *),
38 void *data); 41 void *data);
39 extern void of_dma_controller_free(struct devi 42 extern void of_dma_controller_free(struct device_node *np);
40 43
41 extern int of_dma_router_register(struct devic 44 extern int of_dma_router_register(struct device_node *np,
42 void *(*of_dma_route_allocate) 45 void *(*of_dma_route_allocate)
43 (struct of_phandle_args *, str 46 (struct of_phandle_args *, struct of_dma *),
44 struct dma_router *dma_router) 47 struct dma_router *dma_router);
45 #define of_dma_router_free of_dma_controller_f 48 #define of_dma_router_free of_dma_controller_free
46 49
47 extern struct dma_chan *of_dma_request_slave_c 50 extern struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
48 51 const char *name);
49 extern struct dma_chan *of_dma_simple_xlate(st 52 extern struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
50 struct of_dma *ofdma); 53 struct of_dma *ofdma);
51 extern struct dma_chan *of_dma_xlate_by_chan_i 54 extern struct dma_chan *of_dma_xlate_by_chan_id(struct of_phandle_args *dma_spec,
52 struct of_dma *ofdma); 55 struct of_dma *ofdma);
53 56
54 #else 57 #else
55 static inline int of_dma_controller_register(s 58 static inline int of_dma_controller_register(struct device_node *np,
56 struct dma_chan *(*of_dma_xlat 59 struct dma_chan *(*of_dma_xlate)
57 (struct of_phandle_args *, str 60 (struct of_phandle_args *, struct of_dma *),
58 void *data) 61 void *data)
59 { 62 {
60 return -ENODEV; 63 return -ENODEV;
61 } 64 }
62 65
63 static inline void of_dma_controller_free(stru 66 static inline void of_dma_controller_free(struct device_node *np)
64 { 67 {
65 } 68 }
66 69
67 static inline int of_dma_router_register(struc 70 static inline int of_dma_router_register(struct device_node *np,
68 void *(*of_dma_route_allocate) 71 void *(*of_dma_route_allocate)
69 (struct of_phandle_args *, str 72 (struct of_phandle_args *, struct of_dma *),
70 struct dma_router *dma_router) 73 struct dma_router *dma_router)
71 { 74 {
72 return -ENODEV; 75 return -ENODEV;
73 } 76 }
74 77
75 #define of_dma_router_free of_dma_controller_f 78 #define of_dma_router_free of_dma_controller_free
76 79
77 static inline struct dma_chan *of_dma_request_ 80 static inline struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
78 81 const char *name)
79 { 82 {
80 return ERR_PTR(-ENODEV); 83 return ERR_PTR(-ENODEV);
81 } 84 }
82 85
83 static inline struct dma_chan *of_dma_simple_x 86 static inline struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
84 struct of_dma *ofdma) 87 struct of_dma *ofdma)
85 { 88 {
86 return NULL; 89 return NULL;
87 } 90 }
88 91
89 #define of_dma_xlate_by_chan_id NULL 92 #define of_dma_xlate_by_chan_id NULL
90 93
91 #endif 94 #endif
92 95
93 #endif /* __LINUX_OF_DMA_H */ 96 #endif /* __LINUX_OF_DMA_H */
94 97
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