diff options
Diffstat (limited to 'drivers/staging/dgrp/dgrp_common.h')
| -rw-r--r-- | drivers/staging/dgrp/dgrp_common.h | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/drivers/staging/dgrp/dgrp_common.h b/drivers/staging/dgrp/dgrp_common.h new file mode 100644 index 000000000000..05ff338471ac --- /dev/null +++ b/drivers/staging/dgrp/dgrp_common.h @@ -0,0 +1,208 @@ +/* + * + * Copyright 1999 Digi International (www.digi.com) + * James Puzzo <jamesp at digi dot com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + */ + +#ifndef __DGRP_COMMON_H +#define __DGRP_COMMON_H + +#define DIGI_VERSION "1.9-29" + +#include <linux/fs.h> +#include <linux/timer.h> +#include "drp.h" + +#define DGRP_TTIME 100 +#define DGRP_RTIME 100 + +/************************************************************************ + * All global storage allocation. + ************************************************************************/ + +extern int dgrp_rawreadok; /* Allow raw writing of input */ +extern int dgrp_register_cudevices; /* enable legacy cu devices */ +extern int dgrp_register_prdevices; /* enable transparent print devices */ +extern int dgrp_poll_tick; /* Poll interval - in ms */ + +extern struct list_head nd_struct_list; + +struct dgrp_poll_data { + spinlock_t poll_lock; + struct timer_list timer; + int poll_tick; + ulong poll_round; /* Timer rouding factor */ + long node_active_count; +}; + +extern struct dgrp_poll_data dgrp_poll_data; +extern void dgrp_poll_handler(unsigned long arg); + +/* from dgrp_mon_ops.c */ +extern void dgrp_register_mon_hook(struct proc_dir_entry *de); + +/* from dgrp_tty.c */ +extern int dgrp_tty_init(struct nd_struct *nd); +extern void dgrp_tty_uninit(struct nd_struct *nd); + +/* from dgrp_ports_ops.c */ +extern void dgrp_register_ports_hook(struct proc_dir_entry *de); + +/* from dgrp_net_ops.c */ +extern void dgrp_register_net_hook(struct proc_dir_entry *de); + +/* from dgrp_dpa_ops.c */ +extern void dgrp_register_dpa_hook(struct proc_dir_entry *de); +extern void dgrp_dpa_data(struct nd_struct *, int, u8 *, int); + +/* from dgrp_sysfs.c */ +extern void dgrp_create_class_sysfs_files(void); +extern void dgrp_remove_class_sysfs_files(void); + +extern void dgrp_create_node_class_sysfs_files(struct nd_struct *nd); +extern void dgrp_remove_node_class_sysfs_files(struct nd_struct *nd); + +extern void dgrp_create_tty_sysfs(struct un_struct *un, struct device *c); +extern void dgrp_remove_tty_sysfs(struct device *c); + +/* from dgrp_specproc.c */ +/* + * The list of DGRP entries with r/w capabilities. These + * magic numbers are used for identification purposes. + */ +enum { + DGRP_CONFIG = 1, /* Configure portservers */ + DGRP_NETDIR = 2, /* Directory for "net" devices */ + DGRP_MONDIR = 3, /* Directory for "mon" devices */ + DGRP_PORTSDIR = 4, /* Directory for "ports" devices */ + DGRP_INFO = 5, /* Get info. about the running module */ + DGRP_NODEINFO = 6, /* Get info. about the configured nodes */ + DGRP_DPADIR = 7, /* Directory for the "dpa" devices */ +}; + +/* + * Directions for proc handlers + */ +enum { + INBOUND = 1, /* Data being written to kernel */ + OUTBOUND = 2, /* Data being read from the kernel */ +}; + +/** + * dgrp_proc_entry: structure for dgrp proc dirs + * @id: ID number associated with this particular entry. Should be + * unique across all of DGRP. + * @name: text name associated with the /proc entry + * @mode: file access permisssions for the /proc entry + * @child: pointer to table describing a subdirectory for this entry + * @de: pointer to directory entry for this object once registered. Used + * to grab the handle of the object for unregistration + * @excl_sem: semaphore to provide exclusive to struct + * @excl_cnt: counter of current accesses + * + * Each entry in a DGRP proc directory is described with a + * dgrp_proc_entry structure. A collection of these + * entries (in an array) represents the members associated + * with a particular /proc directory, and is referred to + * as a table. All tables are terminated by an entry with + * zeros for every member. + */ +struct dgrp_proc_entry { + int id; /* Integer identifier */ + const char *name; /* ASCII identifier */ + mode_t mode; /* File access permissions */ + struct dgrp_proc_entry *child; /* Child pointer */ + + /* file ops to use, pass NULL to use default */ + struct file_operations *proc_file_ops; + + struct proc_dir_entry *de; /* proc entry pointer */ + struct semaphore excl_sem; /* Protects exclusive access var */ + int excl_cnt; /* Counts number of curr accesses */ +}; + +extern void dgrp_unregister_proc(void); +extern void dgrp_register_proc(void); + +/*-----------------------------------------------------------------------* + * + * Declarations for common operations: + * + * (either used by more than one of net, mon, or tty, + * or in interrupt context (i.e. the poller)) + * + *-----------------------------------------------------------------------*/ + +void dgrp_carrier(struct ch_struct *ch); +extern int dgrp_inode_permission(struct inode *inode, int op); +extern int dgrp_chk_perm(int mode, int op); + + +/* + * ID manipulation macros (where c1 & c2 are characters, i is + * a long integer, and s is a character array of at least three members + */ + +static inline void ID_TO_CHAR(long i, char *s) +{ + s[0] = ((i & 0xff00)>>8); + s[1] = (i & 0xff); + s[2] = 0; +} + +static inline long CHAR_TO_ID(char *s) +{ + return ((s[0] & 0xff) << 8) | (s[1] & 0xff); +} + +static inline struct nd_struct *nd_struct_get(long major) +{ + struct nd_struct *nd; + + list_for_each_entry(nd, &nd_struct_list, list) { + if (major == nd->nd_major) + return nd; + } + + return NULL; +} + +static inline int nd_struct_add(struct nd_struct *entry) +{ + struct nd_struct *ptr; + + ptr = nd_struct_get(entry->nd_major); + + if (ptr) + return -EBUSY; + + list_add_tail(&entry->list, &nd_struct_list); + + return 0; +} + +static inline int nd_struct_del(struct nd_struct *entry) +{ + struct nd_struct *nd; + + nd = nd_struct_get(entry->nd_major); + + if (!nd) + return -ENODEV; + + list_del(&nd->list); + return 0; +} + +#endif /* __DGRP_COMMON_H */ |