| Uwe Kleine-König | bbecb07 | 2017-12-18 17:59:07 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015 Pengutronix, Uwe Kleine-König <kernel@pengutronix.de> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it under |
| 5 | * the terms of the GNU General Public License version 2 as published by the |
| 6 | * Free Software Foundation. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/device.h> |
| 10 | |
| 11 | #define to_siox_device(_dev) container_of((_dev), struct siox_device, dev) |
| 12 | struct siox_device { |
| 13 | struct list_head node; /* node in smaster->devices */ |
| 14 | struct siox_master *smaster; |
| 15 | struct device dev; |
| 16 | |
| 17 | const char *type; |
| 18 | size_t inbytes; |
| 19 | size_t outbytes; |
| 20 | u8 statustype; |
| 21 | |
| 22 | u8 status_read_clean; |
| 23 | u8 status_written; |
| 24 | u8 status_written_lastcycle; |
| 25 | bool connected; |
| 26 | |
| 27 | /* statistics */ |
| 28 | unsigned int watchdog_errors; |
| 29 | unsigned int status_errors; |
| 30 | |
| 31 | struct kernfs_node *status_errors_kn; |
| 32 | struct kernfs_node *watchdog_kn; |
| 33 | struct kernfs_node *watchdog_errors_kn; |
| 34 | struct kernfs_node *connected_kn; |
| 35 | }; |
| 36 | |
| 37 | bool siox_device_synced(struct siox_device *sdevice); |
| 38 | bool siox_device_connected(struct siox_device *sdevice); |
| 39 | |
| 40 | struct siox_driver { |
| 41 | int (*probe)(struct siox_device *sdevice); |
| 42 | int (*remove)(struct siox_device *sdevice); |
| 43 | void (*shutdown)(struct siox_device *sdevice); |
| 44 | |
| 45 | /* |
| 46 | * buf is big enough to hold sdev->inbytes - 1 bytes, the status byte |
| 47 | * is in the scope of the framework. |
| 48 | */ |
| 49 | int (*set_data)(struct siox_device *sdevice, u8 status, u8 buf[]); |
| 50 | /* |
| 51 | * buf is big enough to hold sdev->outbytes - 1 bytes, the status byte |
| 52 | * is in the scope of the framework |
| 53 | */ |
| 54 | int (*get_data)(struct siox_device *sdevice, const u8 buf[]); |
| 55 | |
| 56 | struct device_driver driver; |
| 57 | }; |
| 58 | |
| 59 | static inline struct siox_driver *to_siox_driver(struct device_driver *driver) |
| 60 | { |
| 61 | if (driver) |
| 62 | return container_of(driver, struct siox_driver, driver); |
| 63 | else |
| 64 | return NULL; |
| 65 | } |
| 66 | |
| 67 | int __siox_driver_register(struct siox_driver *sdriver, struct module *owner); |
| 68 | |
| 69 | static inline int siox_driver_register(struct siox_driver *sdriver) |
| 70 | { |
| 71 | return __siox_driver_register(sdriver, THIS_MODULE); |
| 72 | } |
| 73 | |
| 74 | static inline void siox_driver_unregister(struct siox_driver *sdriver) |
| 75 | { |
| 76 | return driver_unregister(&sdriver->driver); |
| 77 | } |