LXR linux/include/linux/siox.h

   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)
  12struct 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
  37bool siox_device_synced(struct siox_device *sdevice);
  38bool siox_device_connected(struct siox_device *sdevice);
  39
  40struct 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
  59static 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
  67int __siox_driver_register(struct siox_driver *sdriver, struct module *owner);
  68
  69static inline int siox_driver_register(struct siox_driver *sdriver)
  70{
  71        return __siox_driver_register(sdriver, THIS_MODULE);
  72}
  73
  74static inline void siox_driver_unregister(struct siox_driver *sdriver)
  75{
  76        return driver_unregister(&sdriver->driver);
  77}
  78