// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2015-2017 Pengutronix, Uwe Kleine-König <[email protected]> */ #include <linux/kernel.h> #include <linux/device.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/sysfs.h> #include "siox.h" /* * The lowest bit in the SIOX status word signals if the in-device watchdog is * ok. If the bit is set, the device is functional. * * On writing the watchdog timer is reset when this bit toggles. */ #define SIOX_STATUS_WDG … /* * Bits 1 to 3 of the status word read as the bitwise negation of what was * clocked in before. The value clocked in is changed in each cycle and so * allows to detect transmit/receive problems. */ #define SIOX_STATUS_COUNTER … /* * Each Siox-Device has a 4 bit type number that is neither 0 nor 15. This is * available in the upper nibble of the read status. * * On write these bits are DC. */ #define SIOX_STATUS_TYPE … #define CREATE_TRACE_POINTS #include <trace/events/siox.h> static bool siox_is_registered; static void siox_master_lock(struct siox_master *smaster) { … } static void siox_master_unlock(struct siox_master *smaster) { … } static inline u8 siox_status_clean(u8 status_read, u8 status_written) { … } static bool siox_device_counter_error(struct siox_device *sdevice, u8 status_clean) { … } static bool siox_device_type_error(struct siox_device *sdevice, u8 status_clean) { … } static bool siox_device_wdg_error(struct siox_device *sdevice, u8 status_clean) { … } /* * If there is a type or counter error the device is called "unsynced". */ bool siox_device_synced(struct siox_device *sdevice) { … } EXPORT_SYMBOL_GPL(…); /* * A device is called "connected" if it is synced and the watchdog is not * asserted. */ bool siox_device_connected(struct siox_device *sdevice) { … } EXPORT_SYMBOL_GPL(…); static void siox_poll(struct siox_master *smaster) { … } static int siox_poll_thread(void *data) { … } static int __siox_start(struct siox_master *smaster) { … } static int siox_start(struct siox_master *smaster) { … } static int __siox_stop(struct siox_master *smaster) { … } static int siox_stop(struct siox_master *smaster) { … } static ssize_t type_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(type); static ssize_t inbytes_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(inbytes); static ssize_t outbytes_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(outbytes); static ssize_t status_errors_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(status_errors); static ssize_t connected_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(connected); static ssize_t watchdog_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(watchdog); static ssize_t watchdog_errors_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static DEVICE_ATTR_RO(watchdog_errors); static struct attribute *siox_device_attrs[] = …; ATTRIBUTE_GROUPS(…); static void siox_device_release(struct device *dev) { … } static const struct device_type siox_device_type = …; static int siox_match(struct device *dev, const struct device_driver *drv) { … } static int siox_probe(struct device *dev) { … } static void siox_remove(struct device *dev) { … } static void siox_shutdown(struct device *dev) { … } static const struct bus_type siox_bus_type = …; static ssize_t active_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t active_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(active); static struct siox_device *siox_device_add(struct siox_master *smaster, const char *type, size_t inbytes, size_t outbytes, u8 statustype); static ssize_t device_add_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_WO(device_add); static void siox_device_remove(struct siox_master *smaster); static ssize_t device_remove_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_WO(device_remove); static ssize_t poll_interval_ns_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t poll_interval_ns_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(poll_interval_ns); static struct attribute *siox_master_attrs[] = …; ATTRIBUTE_GROUPS(…); static void siox_master_release(struct device *dev) { … } static const struct device_type siox_master_type = …; struct siox_master *siox_master_alloc(struct device *dev, size_t size) { … } EXPORT_SYMBOL_GPL(…); static void devm_siox_master_put(void *data) { … } struct siox_master *devm_siox_master_alloc(struct device *dev, size_t size) { … } EXPORT_SYMBOL_GPL(…); int siox_master_register(struct siox_master *smaster) { … } EXPORT_SYMBOL_GPL(…); void siox_master_unregister(struct siox_master *smaster) { … } EXPORT_SYMBOL_GPL(…); static void devm_siox_master_unregister(void *data) { … } int devm_siox_master_register(struct device *dev, struct siox_master *smaster) { … } EXPORT_SYMBOL_GPL(…); static struct siox_device *siox_device_add(struct siox_master *smaster, const char *type, size_t inbytes, size_t outbytes, u8 statustype) { … } static void siox_device_remove(struct siox_master *smaster) { … } int __siox_driver_register(struct siox_driver *sdriver, struct module *owner) { … } EXPORT_SYMBOL_GPL(…); static int __init siox_init(void) { … } subsys_initcall(siox_init); static void __exit siox_exit(void) { … } module_exit(siox_exit); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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