85 lines
2.3 KiB
C
85 lines
2.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2015 Pengutronix, Uwe Kleine-König <kernel@pengutronix.de>
|
|
*/
|
|
|
|
#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)
|