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f2ab3298 BA |
1 | #ifndef __QCOM_SMD_H__ |
2 | #define __QCOM_SMD_H__ | |
3 | ||
4 | #include <linux/device.h> | |
5 | #include <linux/mod_devicetable.h> | |
6 | ||
7 | struct qcom_smd; | |
8 | struct qcom_smd_channel; | |
9 | struct qcom_smd_lookup; | |
10 | ||
1a7caca2 BA |
11 | /** |
12 | * struct qcom_smd_id - struct used for matching a smd device | |
13 | * @name: name of the channel | |
14 | */ | |
15 | struct qcom_smd_id { | |
16 | char name[20]; | |
17 | }; | |
18 | ||
f2ab3298 BA |
19 | /** |
20 | * struct qcom_smd_device - smd device struct | |
21 | * @dev: the device struct | |
22 | * @channel: handle to the smd channel for this device | |
23 | */ | |
24 | struct qcom_smd_device { | |
25 | struct device dev; | |
26 | struct qcom_smd_channel *channel; | |
27 | }; | |
28 | ||
b853cb96 | 29 | typedef int (*qcom_smd_cb_t)(struct qcom_smd_channel *, const void *, size_t); |
39f0db29 | 30 | |
f2ab3298 BA |
31 | /** |
32 | * struct qcom_smd_driver - smd driver struct | |
33 | * @driver: underlying device driver | |
1a7caca2 | 34 | * @smd_match_table: static channel match table |
f2ab3298 BA |
35 | * @probe: invoked when the smd channel is found |
36 | * @remove: invoked when the smd channel is closed | |
37 | * @callback: invoked when an inbound message is received on the channel, | |
38 | * should return 0 on success or -EBUSY if the data cannot be | |
39 | * consumed at this time | |
40 | */ | |
41 | struct qcom_smd_driver { | |
42 | struct device_driver driver; | |
1a7caca2 BA |
43 | const struct qcom_smd_id *smd_match_table; |
44 | ||
f2ab3298 BA |
45 | int (*probe)(struct qcom_smd_device *dev); |
46 | void (*remove)(struct qcom_smd_device *dev); | |
39f0db29 | 47 | qcom_smd_cb_t callback; |
f2ab3298 BA |
48 | }; |
49 | ||
43315f31 BA |
50 | #if IS_ENABLED(CONFIG_QCOM_SMD) |
51 | ||
f2ab3298 BA |
52 | int qcom_smd_driver_register(struct qcom_smd_driver *drv); |
53 | void qcom_smd_driver_unregister(struct qcom_smd_driver *drv); | |
54 | ||
f79a917e BA |
55 | struct qcom_smd_channel *qcom_smd_open_channel(struct qcom_smd_channel *channel, |
56 | const char *name, | |
57 | qcom_smd_cb_t cb); | |
0a0c08ca | 58 | void qcom_smd_close_channel(struct qcom_smd_channel *channel); |
b853cb96 BA |
59 | void *qcom_smd_get_drvdata(struct qcom_smd_channel *channel); |
60 | void qcom_smd_set_drvdata(struct qcom_smd_channel *channel, void *data); | |
43315f31 BA |
61 | int qcom_smd_send(struct qcom_smd_channel *channel, const void *data, int len); |
62 | ||
f79a917e | 63 | |
da057302 BA |
64 | struct qcom_smd_edge *qcom_smd_register_edge(struct device *parent, |
65 | struct device_node *node); | |
66 | int qcom_smd_unregister_edge(struct qcom_smd_edge *edge); | |
67 | ||
43315f31 BA |
68 | #else |
69 | ||
70 | static inline int qcom_smd_driver_register(struct qcom_smd_driver *drv) | |
71 | { | |
72 | return -ENXIO; | |
73 | } | |
74 | ||
75 | static inline void qcom_smd_driver_unregister(struct qcom_smd_driver *drv) | |
76 | { | |
77 | /* This shouldn't be possible */ | |
78 | WARN_ON(1); | |
79 | } | |
80 | ||
f79a917e BA |
81 | static inline struct qcom_smd_channel * |
82 | qcom_smd_open_channel(struct qcom_smd_channel *channel, | |
83 | const char *name, | |
84 | qcom_smd_cb_t cb) | |
85 | { | |
86 | /* This shouldn't be possible */ | |
87 | WARN_ON(1); | |
88 | return NULL; | |
89 | } | |
90 | ||
0a0c08ca BA |
91 | static inline void qcom_smd_close_channel(struct qcom_smd_channel *channel) |
92 | { | |
93 | /* This shouldn't be possible */ | |
94 | WARN_ON(1); | |
95 | } | |
96 | ||
3a128184 | 97 | static inline void *qcom_smd_get_drvdata(struct qcom_smd_channel *channel) |
f79a917e BA |
98 | { |
99 | /* This shouldn't be possible */ | |
100 | WARN_ON(1); | |
101 | return NULL; | |
102 | } | |
103 | ||
3a128184 | 104 | static inline void qcom_smd_set_drvdata(struct qcom_smd_channel *channel, void *data) |
f79a917e BA |
105 | { |
106 | /* This shouldn't be possible */ | |
107 | WARN_ON(1); | |
108 | } | |
109 | ||
43315f31 BA |
110 | static inline int qcom_smd_send(struct qcom_smd_channel *channel, |
111 | const void *data, int len) | |
112 | { | |
113 | /* This shouldn't be possible */ | |
114 | WARN_ON(1); | |
115 | return -ENXIO; | |
116 | } | |
117 | ||
da057302 BA |
118 | static inline struct qcom_smd_edge * |
119 | qcom_smd_register_edge(struct device *parent, | |
120 | struct device_node *node) | |
121 | { | |
122 | return ERR_PTR(-ENXIO); | |
123 | } | |
124 | ||
125 | static inline int qcom_smd_unregister_edge(struct qcom_smd_edge *edge) | |
126 | { | |
127 | /* This shouldn't be possible */ | |
128 | WARN_ON(1); | |
129 | return -ENXIO; | |
130 | } | |
131 | ||
43315f31 BA |
132 | #endif |
133 | ||
f2ab3298 BA |
134 | #define module_qcom_smd_driver(__smd_driver) \ |
135 | module_driver(__smd_driver, qcom_smd_driver_register, \ | |
136 | qcom_smd_driver_unregister) | |
137 | ||
f2ab3298 BA |
138 | |
139 | #endif |