2 * Copyright (C) 1999-2002 Vojtech Pavlik
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 as published by
6 * the Free Software Foundation.
12 #include <linux/types.h>
13 #include <linux/interrupt.h>
14 #include <linux/list.h>
15 #include <linux/spinlock.h>
16 #include <linux/mutex.h>
17 #include <linux/device.h>
18 #include <linux/mod_devicetable.h>
19 #include <uapi/linux/serio.h>
29 struct serio_device_id id;
31 spinlock_t lock; /* protects critical sections from port's interrupt handler */
33 int (*write)(struct serio *, unsigned char);
34 int (*open)(struct serio *);
35 void (*close)(struct serio *);
36 int (*start)(struct serio *);
37 void (*stop)(struct serio *);
40 struct list_head child_node; /* Entry in parent->children list */
41 struct list_head children;
42 unsigned int depth; /* level of nesting in serio hierarchy */
44 struct serio_driver *drv; /* accessed from interrupt, must be protected by serio->lock and serio->sem */
45 struct mutex drv_mutex; /* protects serio->drv so attributes can pin driver */
49 struct list_head node;
51 #define to_serio_port(d) container_of(d, struct serio, dev)
54 const char *description;
56 const struct serio_device_id *id_table;
59 void (*write_wakeup)(struct serio *);
60 irqreturn_t (*interrupt)(struct serio *, unsigned char, unsigned int);
61 int (*connect)(struct serio *, struct serio_driver *drv);
62 int (*reconnect)(struct serio *);
63 void (*disconnect)(struct serio *);
64 void (*cleanup)(struct serio *);
66 struct device_driver driver;
68 #define to_serio_driver(d) container_of(d, struct serio_driver, driver)
70 int serio_open(struct serio *serio, struct serio_driver *drv);
71 void serio_close(struct serio *serio);
72 void serio_rescan(struct serio *serio);
73 void serio_reconnect(struct serio *serio);
74 irqreturn_t serio_interrupt(struct serio *serio, unsigned char data, unsigned int flags);
76 void __serio_register_port(struct serio *serio, struct module *owner);
78 /* use a define to avoid include chaining to get THIS_MODULE */
79 #define serio_register_port(serio) \
80 __serio_register_port(serio, THIS_MODULE)
82 void serio_unregister_port(struct serio *serio);
83 void serio_unregister_child_port(struct serio *serio);
85 int __must_check __serio_register_driver(struct serio_driver *drv,
86 struct module *owner, const char *mod_name);
88 /* use a define to avoid include chaining to get THIS_MODULE & friends */
89 #define serio_register_driver(drv) \
90 __serio_register_driver(drv, THIS_MODULE, KBUILD_MODNAME)
92 void serio_unregister_driver(struct serio_driver *drv);
95 * module_serio_driver() - Helper macro for registering a serio driver
96 * @__serio_driver: serio_driver struct
98 * Helper macro for serio drivers which do not do anything special in
99 * module init/exit. This eliminates a lot of boilerplate. Each module
100 * may only use this macro once, and calling it replaces module_init()
103 #define module_serio_driver(__serio_driver) \
104 module_driver(__serio_driver, serio_register_driver, \
105 serio_unregister_driver)
107 static inline int serio_write(struct serio *serio, unsigned char data)
110 return serio->write(serio, data);
115 static inline void serio_drv_write_wakeup(struct serio *serio)
117 if (serio->drv && serio->drv->write_wakeup)
118 serio->drv->write_wakeup(serio);
122 * Use the following functions to manipulate serio's per-port
123 * driver-specific data.
125 static inline void *serio_get_drvdata(struct serio *serio)
127 return dev_get_drvdata(&serio->dev);
130 static inline void serio_set_drvdata(struct serio *serio, void *data)
132 dev_set_drvdata(&serio->dev, data);
136 * Use the following functions to protect critical sections in
137 * driver code from port's interrupt handler
139 static inline void serio_pause_rx(struct serio *serio)
141 spin_lock_irq(&serio->lock);
144 static inline void serio_continue_rx(struct serio *serio)
146 spin_unlock_irq(&serio->lock);