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0456c66f4e
serio devices exposed via platform firmware interfaces such as ACPI may provide additional identifying information of use to userspace. We don't associate the serio devices with the firmware device (we don't set it as parent), so there's no way for userspace to make use of this information. We cannot change the parent for serio devices instantiated though a firmware interface as that would break suspend / resume ordering. Therefore this patch adds a new firmware_id sysfs attribute so that userspace can get a string from there with any additional identifying information the firmware interface may provide. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Acked-by: Peter Hutterer <peter.hutterer@who-t.net> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
151 lines
4.1 KiB
C
151 lines
4.1 KiB
C
/*
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* Copyright (C) 1999-2002 Vojtech Pavlik
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#ifndef _SERIO_H
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#define _SERIO_H
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#include <linux/types.h>
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#include <linux/interrupt.h>
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#include <linux/list.h>
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#include <linux/spinlock.h>
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#include <linux/mutex.h>
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#include <linux/device.h>
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#include <linux/mod_devicetable.h>
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#include <uapi/linux/serio.h>
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struct serio {
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void *port_data;
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char name[32];
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char phys[32];
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char firmware_id[128];
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bool manual_bind;
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struct serio_device_id id;
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spinlock_t lock; /* protects critical sections from port's interrupt handler */
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int (*write)(struct serio *, unsigned char);
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int (*open)(struct serio *);
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void (*close)(struct serio *);
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int (*start)(struct serio *);
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void (*stop)(struct serio *);
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struct serio *parent;
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struct list_head child_node; /* Entry in parent->children list */
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struct list_head children;
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unsigned int depth; /* level of nesting in serio hierarchy */
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struct serio_driver *drv; /* accessed from interrupt, must be protected by serio->lock and serio->sem */
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struct mutex drv_mutex; /* protects serio->drv so attributes can pin driver */
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struct device dev;
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struct list_head node;
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};
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#define to_serio_port(d) container_of(d, struct serio, dev)
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struct serio_driver {
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const char *description;
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const struct serio_device_id *id_table;
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bool manual_bind;
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void (*write_wakeup)(struct serio *);
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irqreturn_t (*interrupt)(struct serio *, unsigned char, unsigned int);
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int (*connect)(struct serio *, struct serio_driver *drv);
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int (*reconnect)(struct serio *);
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void (*disconnect)(struct serio *);
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void (*cleanup)(struct serio *);
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struct device_driver driver;
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};
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#define to_serio_driver(d) container_of(d, struct serio_driver, driver)
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int serio_open(struct serio *serio, struct serio_driver *drv);
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void serio_close(struct serio *serio);
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void serio_rescan(struct serio *serio);
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void serio_reconnect(struct serio *serio);
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irqreturn_t serio_interrupt(struct serio *serio, unsigned char data, unsigned int flags);
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void __serio_register_port(struct serio *serio, struct module *owner);
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/* use a define to avoid include chaining to get THIS_MODULE */
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#define serio_register_port(serio) \
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__serio_register_port(serio, THIS_MODULE)
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void serio_unregister_port(struct serio *serio);
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void serio_unregister_child_port(struct serio *serio);
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int __must_check __serio_register_driver(struct serio_driver *drv,
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struct module *owner, const char *mod_name);
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/* use a define to avoid include chaining to get THIS_MODULE & friends */
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#define serio_register_driver(drv) \
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__serio_register_driver(drv, THIS_MODULE, KBUILD_MODNAME)
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void serio_unregister_driver(struct serio_driver *drv);
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/**
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* module_serio_driver() - Helper macro for registering a serio driver
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* @__serio_driver: serio_driver struct
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*
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* Helper macro for serio drivers which do not do anything special in
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* module init/exit. This eliminates a lot of boilerplate. Each module
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* may only use this macro once, and calling it replaces module_init()
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* and module_exit().
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*/
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#define module_serio_driver(__serio_driver) \
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module_driver(__serio_driver, serio_register_driver, \
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serio_unregister_driver)
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static inline int serio_write(struct serio *serio, unsigned char data)
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{
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if (serio->write)
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return serio->write(serio, data);
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else
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return -1;
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}
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static inline void serio_drv_write_wakeup(struct serio *serio)
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{
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if (serio->drv && serio->drv->write_wakeup)
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serio->drv->write_wakeup(serio);
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}
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/*
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* Use the following functions to manipulate serio's per-port
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* driver-specific data.
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*/
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static inline void *serio_get_drvdata(struct serio *serio)
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{
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return dev_get_drvdata(&serio->dev);
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}
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static inline void serio_set_drvdata(struct serio *serio, void *data)
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{
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dev_set_drvdata(&serio->dev, data);
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}
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/*
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* Use the following functions to protect critical sections in
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* driver code from port's interrupt handler
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*/
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static inline void serio_pause_rx(struct serio *serio)
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{
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spin_lock_irq(&serio->lock);
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}
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static inline void serio_continue_rx(struct serio *serio)
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{
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spin_unlock_irq(&serio->lock);
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}
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#endif
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