- 根目录:
- drivers
- staging
- dgrp
- dgrp_sysfs.c
/*
* Copyright 2004 Digi International (www.digi.com)
* Scott H Kilau <Scott_Kilau 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.
*
*/
#include "dgrp_common.h"
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/string.h>
#include <linux/serial_reg.h>
#include <linux/pci.h>
#include <linux/kdev_t.h>
#define PORTSERVER_DIVIDEND 1843200
#define SERIAL_TYPE_NORMAL 1
#define SERIAL_TYPE_CALLOUT 2
#define SERIAL_TYPE_XPRINT 3
static struct class *dgrp_class;
static struct device *dgrp_class_nodes_dev;
static struct device *dgrp_class_global_settings_dev;
static ssize_t dgrp_class_version_show(struct class *class,
struct class_attribute *attr, char *buf)
{
return snprintf(buf, PAGE_SIZE, "%s\n", DIGI_VERSION);
}
static CLASS_ATTR(driver_version, 0400, dgrp_class_version_show, NULL);
static ssize_t dgrp_class_register_with_sysfs_show(struct device *c,
struct device_attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "1\n");
}
static DEVICE_ATTR(register_with_sysfs, 0400,
dgrp_class_register_with_sysfs_show, NULL);
static ssize_t dgrp_class_pollrate_show(struct device *c,
struct device_attribute *attr,
char *buf)
{
return snprintf(buf, PAGE_SIZE, "%d\n", dgrp_poll_tick);
}
static ssize_t dgrp_class_pollrate_store(struct device *c,
struct device_attribute *attr,
const char *buf, size_t count)
{
sscanf(buf, "0x%x\n", &dgrp_poll_tick);
return count;
}
static DEVICE_ATTR(pollrate, 0600, dgrp_class_pollrate_show,
dgrp_class_pollrate_store);
static struct attribute *dgrp_sysfs_global_settings_entries[] = {
&dev_attr_pollrate.attr,
&dev_attr_register_with_sysfs.attr,
NULL
};
static struct attribute_group dgrp_global_settings_attribute_group = {
.name = NULL,
.attrs = dgrp_sysfs_global_settings_entries,
};
int dgrp_create_class_sysfs_files(void)
{
int ret = 0;
int max_majors = 1U << (32 - MINORBITS);
dgrp_class = class_create(THIS_MODULE, "digi_realport");
if (IS_ERR(dgrp_class))
return PTR_ERR(dgrp_class);
ret = class_create_file(dgrp_class, &class_attr_driver_version);
if (ret)
goto err_class;
dgrp_class_global_settings_dev = device_create(dgrp_class, NULL,
MKDEV(0, max_majors + 1), NULL, "driver_settings");
if (IS_ERR(dgrp_class_global_settings_dev)) {
ret = PTR_ERR(dgrp_class_global_settings_dev);
goto err_file;
}
ret = sysfs_create_group(&dgrp_class_global_settings_dev->kobj,
&dgrp_global_settings_attribute_group);
if (ret) {
pr_alert("%s: failed to create sysfs global settings device attributes.\n",
__func__);
goto err_dev1;
}
dgrp_class_nodes_dev = device_create(dgrp_class, NULL,
MKDEV(0, max_majors + 2), NULL, "nodes");
if (IS_ERR(dgrp_class_nodes_dev)) {
ret = PTR_ERR(dgrp_class_nodes_dev);
goto err_group;
}
return 0;
err_group:
sysfs_remove_group(&dgrp_class_global_settings_dev->kobj,
&dgrp_global_settings_attribute_group);
err_dev1:
device_destroy(dgrp_class, MKDEV(0, max_majors + 1));
err_file:
class_remove_file(dgrp_class, &class_attr_driver_version);
err_class:
class_destroy(dgrp_class);
return ret;
}
void dgrp_remove_class_sysfs_files(void)
{
struct nd_struct *nd;
int max_majors = 1U << (32 - MINORBITS);
list_for_each_entry(nd, &nd_struct_list, list)
dgrp_remove_node_class_sysfs_files(nd);
sysfs_remove_group(&dgrp_class_global_settings_dev->kobj,
&dgrp_global_settings_attribute_group);
class_remove_file(dgrp_class, &class_attr_driver_version);
device_destroy(dgrp_class, MKDEV(0, max_majors + 1));
device_destroy(dgrp_class, MKDEV(0, max_majors + 2));
class_destroy(dgrp_class);
}
static ssize_t dgrp_node_state_show(struct device *c,
struct device_attribute *attr, char *buf)
{
struct nd_struct *nd;
if (!c)
return 0;
nd = (struct nd_struct *) dev_get_drvdata(c);
if (!nd)
return 0;
return snprintf(buf, PAGE_SIZE, "%s\n", ND_STATE_STR(nd->nd_state));
}
static DEVICE_ATTR(state, 0600, dgrp_node_state_show, NULL);
static ssize_t dgrp_node_description_show(struct device *c,
struct device_attribute *attr,
char *buf)
{
struct nd_struct *nd;
if (!c)
return 0;
nd = (struct nd_struct *) dev_get_drvdata(c);
if (!nd)
return 0;
if (nd->nd_state == NS_READY)
return snprintf(buf, PAGE_SIZE, "%s\n", nd->nd_ps_desc);
return 0;
}
static DEVICE_ATTR(description_info, 0600, dgrp_node_description_show, NULL);
static ssize_t dgrp_node_hw_version_show(struct device *c,
struct device_attribute *attr,
char *buf)
{
struct nd_struct *nd;
if (!c)
return 0;
nd = (struct nd_struct *) dev_get_drvdata(c);
if (!nd)
return 0;
if (nd->nd_state == NS_READY)
return snprintf(buf, PAGE_SIZE, "%d.%d\n",
(nd->nd_hw_ver >> 8) & 0xff,
nd->nd_hw_ver & 0xff);
return 0;
}
static DEVICE_ATTR(hw_version_info, 0600, dgrp_node_hw_version_show, NULL);
static ssize_t dgrp_node_hw_id_show(struct device *c,
struct device_attribute *attr, char *buf)
{
struct nd_struct *nd;
if (!c)
return 0;
nd = (struct nd_struct *) dev_get_drvdata(c);
if (!nd)
return 0;
if (nd->nd_state == NS_READY)
return snprintf(buf, PAGE_SIZE, "%d\n", nd->nd_hw_id);
return 0;
}
static DEVICE_ATTR(hw_id_info, 0600, dgrp_node_hw_id_show, NULL);
static ssize_t dgrp_node_sw_version_show(struct device *c,
struct device_attribute *attr,
char *buf)
{
struct nd_struct *nd;
if (!c)
return 0;
nd = (struct nd_struct *) dev_get_drvdata(c);
if (!nd)
return 0;
if (nd->nd_state == NS_READY)
return snprintf(buf, PAGE_SIZE, "%d.%d\n",
(nd->nd_sw_ver >> 8) & 0xff,
nd->nd_sw_ver & 0xff);
return 0;
}
static DEVICE_ATTR(sw_version_info, 0600, dgrp_node_sw_version_show, NULL);
static struct attribute *dgrp_sysfs_node_entries[] = {
&dev_attr_state.attr,
&dev_attr_description_info.attr,
&dev_attr_hw_version_info.attr,
&dev_attr_hw_id_info.attr,
&dev_attr_sw_version_info.attr,
NULL
};
static struct attribute_group dgrp_node_attribute_group = {
.name = NULL,
.attrs = dgrp_sysfs_node_entries,
};
void dgrp_create_node_class_sysfs_files(struct nd_struct *nd)
{
int ret;
char name[10];
if (nd->nd_ID)
ID_TO_CHAR(nd->nd_ID, name);
else
sprintf(name, "node%ld", nd->nd_major);
nd->nd_class_dev = device_create(dgrp_class, dgrp_class_nodes_dev,
MKDEV(0, nd->nd_major), NULL, name);
ret = sysfs_create_group(&nd->nd_class_dev->kobj,
&dgrp_node_attribute_group);
if (ret) {
pr_alert("%s: failed to create sysfs node device attributes.\n",
__func__);
sysfs_remove_group(&nd->nd_class_dev->kobj,
&dgrp_node_attribute_group);
return;
}
dev_set_drvdata(nd->nd_class_dev, nd);
}
void dgrp_remove_node_class_sysfs_files(struct nd_struct *nd)
{
if (nd->nd_class_dev) {
sysfs_remove_group(&nd->nd_class_dev->kobj,
&dgrp_node_attribute_group);
device_destroy(dgrp_class, MKDEV(0, nd->nd_major));
nd->nd_class_dev = NULL;
}
}
static ssize_t dgrp_tty_state_show(struct device *d,
struct device_attribute *attr, char *buf)
{
struct un_struct *un;
if (!d)
return 0;
un = (struct un_struct *) dev_get_drvdata(d);
if (!un)
return 0;
return snprintf(buf, PAGE_SIZE, "%s\n",
un->un_open_count ? "Open" : "Closed");
}
static DEVICE_ATTR(state_info, 0600, dgrp_tty_state_show, NULL);
static ssize_t dgrp_tty_baud_show(struct device *d,
struct device_attribute *attr, char *buf)
{
struct ch_struct *ch;
struct un_struct *un;
if (!d)
return 0;
un = (struct un_struct *) dev_get_drvdata(d);
if (!un)
return 0;
ch = un->un_ch;
if (!ch)
return 0;
return snprintf(buf, PAGE_SIZE, "%d\n",
un->un_open_count ? (PORTSERVER_DIVIDEND / ch->ch_s_brate) : 0);
}
static DEVICE_ATTR(baud_info, 0400, dgrp_tty_baud_show, NULL);
static ssize_t dgrp_tty_msignals_show(struct device *d,
struct device_attribute *attr, char *buf)
{
struct ch_struct *ch;
struct un_struct *un;
if (!d)
return 0;
un = (struct un_struct *) dev_get_drvdata(d);
if (!un)
return 0;
ch = un->un_ch;
if (!ch)
return 0;
if (ch->ch_open_count) {
return snprintf(buf, PAGE_SIZE, "%s %s %s %s %s %s\n",
(ch->ch_s_mlast & DM_RTS) ? "RTS" : "",
(ch->ch_s_mlast & DM_CTS) ? "CTS" : "",
(ch->ch_s_mlast & DM_DTR) ? "DTR" : "",
(ch->ch_s_mlast & DM_DSR) ? "DSR" : "",
(ch->ch_s_mlast & DM_CD) ? "DCD" : "",
(ch->ch_s_mlast & DM_RI) ? "RI" : "");
}
return 0;
}
static DEVICE_ATTR(msignals_info, 0400, dgrp_tty_msignals_show, NULL);
static ssize_t dgrp_tty_iflag_show(struct device *d,
struct device_attribute *attr, char *buf)
{
struct ch_struct *ch;
struct un_struct *un;
if (!d)
return 0;
un = (struct un_struct *) dev_get_drvdata(d);
if (!un)
return 0;
ch = un->un_ch;
if (!ch)
return 0;
return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_s_iflag);
}
static DEVICE_ATTR(iflag_info, 0600, dgrp_tty_iflag_show, NULL);
static ssize_t dgrp_tty_cflag_show(struct device *d,
struct device_attribute *attr, char *buf)
{
struct ch_struct *ch;
struct un_struct *un;
if (!d)
return 0;
un = (struct un_struct *) dev_get_drvdata(d);
if (!un)
return 0;
ch = un->un_ch;
if (!ch)
return 0;
return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_s_cflag);
}
static DEVICE_ATTR(cflag_info, 0600, dgrp_tty_cflag_show, NULL);
static ssize_t dgrp_tty_oflag_show(struct device *d,
struct device_attribute *attr, char *buf)
{
struct ch_struct *ch;
struct un_struct *un;
if (!d)
return 0;
un = (struct un_struct *) dev_get_drvdata(d);
if (!un)
return 0;
ch = un->un_ch;
if (!ch)
return 0;
return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_s_oflag);
}
static DEVICE_ATTR(oflag_info, 0600, dgrp_tty_oflag_show, NULL);
static ssize_t dgrp_tty_digi_flag_show(struct device *d,
struct device_attribute *attr, char *buf)
{
struct ch_struct *ch;
struct un_struct *un;
if (!d)
return 0;
un = (struct un_struct *) dev_get_drvdata(d);
if (!un)
return 0;
ch = un->un_ch;
if (!ch)
return 0;
return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_digi.digi_flags);
}
static DEVICE_ATTR(digi_flag_info, 0600, dgrp_tty_digi_flag_show, NULL);
static ssize_t dgrp_tty_rxcount_show(struct device *d,
struct device_attribute *attr, char *buf)
{
struct ch_struct *ch;
struct un_struct *un;
if (!d)
return 0;
un = (struct un_struct *) dev_get_drvdata(d);
if (!un)
return 0;
ch = un->un_ch;
if (!ch)
return 0;
return snprintf(buf, PAGE_SIZE, "%d\n", ch->ch_rxcount);
}
static DEVICE_ATTR(rxcount_info, 0600, dgrp_tty_rxcount_show, NULL);
static ssize_t dgrp_tty_txcount_show(struct device *d,
struct device_attribute *attr, char *buf)
{
struct ch_struct *ch;
struct un_struct *un;
if (!d)
return 0;
un = (struct un_struct *) dev_get_drvdata(d);
if (!un)
return 0;
ch = un->un_ch;
if (!ch)
return 0;
return snprintf(buf, PAGE_SIZE, "%d\n", ch->ch_txcount);
}
static DEVICE_ATTR(txcount_info, 0600, dgrp_tty_txcount_show, NULL);
static ssize_t dgrp_tty_name_show(struct device *d,
struct device_attribute *attr, char *buf)
{
struct nd_struct *nd;
struct ch_struct *ch;
struct un_struct *un;
char name[10];
if (!d)
return 0;
un = (struct un_struct *) dev_get_drvdata(d);
if (!un)
return 0;
ch = un->un_ch;
if (!ch)
return 0;
nd = ch->ch_nd;
if (!nd)
return 0;
ID_TO_CHAR(nd->nd_ID, name);
return snprintf(buf, PAGE_SIZE, "%s%s%02d\n",
un->un_type == SERIAL_TYPE_XPRINT ? "pr" : "tty",
name, ch->ch_portnum);
}
static DEVICE_ATTR(custom_name, 0600, dgrp_tty_name_show, NULL);
static struct attribute *dgrp_sysfs_tty_entries[] = {
&dev_attr_state_info.attr,
&dev_attr_baud_info.attr,
&dev_attr_msignals_info.attr,
&dev_attr_iflag_info.attr,
&dev_attr_cflag_info.attr,
&dev_attr_oflag_info.attr,
&dev_attr_digi_flag_info.attr,
&dev_attr_rxcount_info.attr,
&dev_attr_txcount_info.attr,
&dev_attr_custom_name.attr,
NULL
};
static struct attribute_group dgrp_tty_attribute_group = {
.name = NULL,
.attrs = dgrp_sysfs_tty_entries,
};
void dgrp_create_tty_sysfs(struct un_struct *un, struct device *c)
{
int ret;
ret = sysfs_create_group(&c->kobj, &dgrp_tty_attribute_group);
if (ret) {
pr_alert("%s: failed to create sysfs tty device attributes.\n",
__func__);
sysfs_remove_group(&c->kobj, &dgrp_tty_attribute_group);
return;
}
dev_set_drvdata(c, un);
}
void dgrp_remove_tty_sysfs(struct device *c)
{
sysfs_remove_group(&c->kobj, &dgrp_tty_attribute_group);
}