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d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
bbecb07f UKK |
2 | /* |
3 | * Copyright (C) 2015 Pengutronix, Uwe Kleine-König <kernel@pengutronix.de> | |
bbecb07f UKK |
4 | */ |
5 | ||
6 | #include <linux/device.h> | |
7 | ||
8 | #define to_siox_device(_dev) container_of((_dev), struct siox_device, dev) | |
9 | struct siox_device { | |
10 | struct list_head node; /* node in smaster->devices */ | |
11 | struct siox_master *smaster; | |
12 | struct device dev; | |
13 | ||
14 | const char *type; | |
15 | size_t inbytes; | |
16 | size_t outbytes; | |
17 | u8 statustype; | |
18 | ||
19 | u8 status_read_clean; | |
20 | u8 status_written; | |
21 | u8 status_written_lastcycle; | |
22 | bool connected; | |
23 | ||
24 | /* statistics */ | |
25 | unsigned int watchdog_errors; | |
26 | unsigned int status_errors; | |
27 | ||
28 | struct kernfs_node *status_errors_kn; | |
29 | struct kernfs_node *watchdog_kn; | |
30 | struct kernfs_node *watchdog_errors_kn; | |
31 | struct kernfs_node *connected_kn; | |
32 | }; | |
33 | ||
34 | bool siox_device_synced(struct siox_device *sdevice); | |
35 | bool siox_device_connected(struct siox_device *sdevice); | |
36 | ||
37 | struct siox_driver { | |
38 | int (*probe)(struct siox_device *sdevice); | |
1c12c270 | 39 | void (*remove)(struct siox_device *sdevice); |
bbecb07f UKK |
40 | void (*shutdown)(struct siox_device *sdevice); |
41 | ||
42 | /* | |
43 | * buf is big enough to hold sdev->inbytes - 1 bytes, the status byte | |
44 | * is in the scope of the framework. | |
45 | */ | |
46 | int (*set_data)(struct siox_device *sdevice, u8 status, u8 buf[]); | |
47 | /* | |
48 | * buf is big enough to hold sdev->outbytes - 1 bytes, the status byte | |
49 | * is in the scope of the framework | |
50 | */ | |
51 | int (*get_data)(struct siox_device *sdevice, const u8 buf[]); | |
52 | ||
53 | struct device_driver driver; | |
54 | }; | |
55 | ||
56 | static inline struct siox_driver *to_siox_driver(struct device_driver *driver) | |
57 | { | |
58 | if (driver) | |
59 | return container_of(driver, struct siox_driver, driver); | |
60 | else | |
61 | return NULL; | |
62 | } | |
63 | ||
64 | int __siox_driver_register(struct siox_driver *sdriver, struct module *owner); | |
65 | ||
66 | static inline int siox_driver_register(struct siox_driver *sdriver) | |
67 | { | |
68 | return __siox_driver_register(sdriver, THIS_MODULE); | |
69 | } | |
70 | ||
71 | static inline void siox_driver_unregister(struct siox_driver *sdriver) | |
72 | { | |
73 | return driver_unregister(&sdriver->driver); | |
74 | } | |
8f3fd895 EW |
75 | |
76 | /* | |
77 | * module_siox_driver() - Helper macro for drivers that don't do | |
78 | * anything special in module init/exit. This eliminates a lot of | |
79 | * boilerplate. Each module may only use this macro once, and | |
80 | * calling it replaces module_init() and module_exit() | |
81 | */ | |
82 | #define module_siox_driver(__siox_driver) \ | |
83 | module_driver(__siox_driver, siox_driver_register, \ | |
84 | siox_driver_unregister) |