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/*
* Copyright (C) 2015 Pengutronix, Uwe Kleine-König <kernel@pengutronix.de>
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License version 2 as published by the
* Free Software Foundation.
*/
#include <linux/device.h>
#define to_siox_device(_dev) container_of((_dev), struct siox_device, dev)
struct siox_device {
struct list_head node; /* node in smaster->devices */
struct siox_master *smaster;
struct device dev;
const char *type;
size_t inbytes;
size_t outbytes;
u8 statustype;
u8 status_read_clean;
u8 status_written;
u8 status_written_lastcycle;
bool connected;
/* statistics */
unsigned int watchdog_errors;
unsigned int status_errors;
struct kernfs_node *status_errors_kn;
struct kernfs_node *watchdog_kn;
struct kernfs_node *watchdog_errors_kn;
struct kernfs_node *connected_kn;
};
bool siox_device_synced(struct siox_device *sdevice);
bool siox_device_connected(struct siox_device *sdevice);
struct siox_driver {
int (*probe)(struct siox_device *sdevice);
int (*remove)(struct siox_device *sdevice);
void (*shutdown)(struct siox_device *sdevice);
/*
* buf is big enough to hold sdev->inbytes - 1 bytes, the status byte
* is in the scope of the framework.
*/
int (*set_data)(struct siox_device *sdevice, u8 status, u8 buf[]);
/*
* buf is big enough to hold sdev->outbytes - 1 bytes, the status byte
* is in the scope of the framework
*/
int (*get_data)(struct siox_device *sdevice, const u8 buf[]);
struct device_driver driver;
};
static inline struct siox_driver *to_siox_driver(struct device_driver *driver)
{
if (driver)
return container_of(driver, struct siox_driver, driver);
else
return NULL;
}
int __siox_driver_register(struct siox_driver *sdriver, struct module *owner);
static inline int siox_driver_register(struct siox_driver *sdriver)
{
return __siox_driver_register(sdriver, THIS_MODULE);
}
static inline void siox_driver_unregister(struct siox_driver *sdriver)
{
return driver_unregister(&sdriver->driver);
}
/*
* module_siox_driver() - Helper macro for drivers that don't do
* anything special in module init/exit. This eliminates a lot of
* boilerplate. Each module may only use this macro once, and
* calling it replaces module_init() and module_exit()
*/
#define module_siox_driver(__siox_driver) \
module_driver(__siox_driver, siox_driver_register, \
siox_driver_unregister)
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