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ethercat/master/cdev.c

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/******************************************************************************
*
* $Id$
*
* Copyright (C) 2006 Florian Pose, Ingenieurgemeinschaft IgH
*
* This file is part of the IgH EtherCAT Master.
*
* The IgH EtherCAT Master 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 of the
* License, or (at your option) any later version.
*
* The IgH EtherCAT Master is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with the IgH EtherCAT Master; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* The right to use EtherCAT Technology is granted and comes free of
* charge under condition of compatibility of product made by
* Licensee. People intending to distribute/sell products based on the
* code, have to sign an agreement to guarantee that products using
* software based on IgH EtherCAT master stay compatible with the actual
* EtherCAT specification (which are released themselves as an open
* standard) as the (only) precondition to have the right to use EtherCAT
* Technology, IP and trade marks.
*
*****************************************************************************/
/**
\file
EtherCAT master character device.
*/
/*****************************************************************************/
#include <linux/module.h>
#include "cdev.h"
#include "master.h"
#include "ioctl.h"
/*****************************************************************************/
/** \cond */
int eccdev_open(struct inode *, struct file *);
int eccdev_release(struct inode *, struct file *);
ssize_t eccdev_read(struct file *, char __user *, size_t, loff_t *);
ssize_t eccdev_write(struct file *, const char __user *, size_t, loff_t *);
long eccdev_ioctl(struct file *, unsigned int, unsigned long);
/*****************************************************************************/
static struct file_operations eccdev_fops = {
.owner = THIS_MODULE,
.open = eccdev_open,
.release = eccdev_release,
.unlocked_ioctl = eccdev_ioctl
};
/** \endcond */
/*****************************************************************************/
/** Constructor.
*
* \return 0 in case of success, else < 0
*/
int ec_cdev_init(
ec_cdev_t *cdev, /**< EtherCAT master character device. */
ec_master_t *master, /**< Parent master. */
dev_t dev_num /**< Device number. */
)
{
cdev->master = master;
cdev_init(&cdev->cdev, &eccdev_fops);
cdev->cdev.owner = THIS_MODULE;
if (cdev_add(&cdev->cdev,
MKDEV(MAJOR(dev_num), master->index), 1)) {
EC_ERR("Failed to add character device!\n");
return -1;
}
return 0;
}
/*****************************************************************************/
/** Destructor.
*/
void ec_cdev_clear(ec_cdev_t *cdev /**< EtherCAT XML device */)
{
cdev_del(&cdev->cdev);
}
/******************************************************************************
* File operations
*****************************************************************************/
int eccdev_open(struct inode *inode, struct file *filp)
{
ec_cdev_t *cdev = container_of(inode->i_cdev, ec_cdev_t, cdev);
ec_master_t *master = cdev->master;
filp->private_data = cdev;
if (master->debug_level)
EC_DBG("File opened.\n");
return 0;
}
/*****************************************************************************/
int eccdev_release(struct inode *inode, struct file *filp)
{
ec_cdev_t *cdev = (ec_cdev_t *) filp->private_data;
ec_master_t *master = cdev->master;
if (master->debug_level)
EC_DBG("File closed.\n");
return 0;
}
/*****************************************************************************/
long eccdev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
ec_cdev_t *cdev = (ec_cdev_t *) filp->private_data;
ec_master_t *master = cdev->master;
long retval = 0;
if (master->debug_level)
EC_DBG("ioctl(filp = %x, cmd = %u, arg = %u)\n",
(u32) filp, (u32) cmd, (u32) arg);
// FIXME lock
switch (cmd) {
case EC_IOCTL_SLAVE_COUNT:
retval = master->slave_count;
break;
case EC_IOCTL_SLAVE:
{
ec_ioctl_slave_t data;
const ec_slave_t *slave;
if (copy_from_user(&data, (void __user *) arg, sizeof(data))) {
retval = -EFAULT;
break;
}
if (!(slave = ec_master_find_slave(
master, 0, data.position))) {
EC_ERR("Slave %u does not exist!\n", data.position);
retval = -EINVAL;
break;
}
data.vendor_id = slave->sii.vendor_id;
data.product_code = slave->sii.product_code;
data.revision_number = slave->sii.revision_number;
data.serial_number = slave->sii.serial_number;
data.alias = slave->sii.alias;
data.state = slave->current_state;
data.sync_count = slave->sii.sync_count;
if (slave->sii.name) {
strncpy(data.name, slave->sii.name,
EC_IOCTL_SLAVE_NAME_SIZE);
data.name[EC_IOCTL_SLAVE_NAME_SIZE - 1] = 0;
} else {
data.name[0] = 0;
}
if (copy_to_user((void __user *) arg, &data, sizeof(data))) {
retval = -EFAULT;
break;
}
break;
}
case EC_IOCTL_SYNC:
{
ec_ioctl_sync_t data;
const ec_slave_t *slave;
const ec_sync_t *sync;
if (copy_from_user(&data, (void __user *) arg, sizeof(data))) {
retval = -EFAULT;
break;
}
if (!(slave = ec_master_find_slave(
master, 0, data.slave_position))) {
EC_ERR("Slave %u does not exist!\n", data.slave_position);
retval = -EINVAL;
break;
}
if (data.sync_index >= slave->sii.sync_count) {
EC_ERR("Sync manager %u does not exist in slave %u!\n",
data.sync_index, data.slave_position);
retval = -EINVAL;
break;
}
sync = &slave->sii.syncs[data.sync_index];
data.physical_start_address = sync->physical_start_address;
data.default_size = sync->length;
data.control_register = sync->control_register;
data.enable = sync->enable;
data.assign_source = sync->assign_source;
data.pdo_count = ec_pdo_list_count(&sync->pdos);
if (copy_to_user((void __user *) arg, &data, sizeof(data))) {
retval = -EFAULT;
break;
}
break;
}
case EC_IOCTL_PDO:
{
ec_ioctl_pdo_t data;
const ec_slave_t *slave;
const ec_sync_t *sync;
const ec_pdo_t *pdo;
if (copy_from_user(&data, (void __user *) arg, sizeof(data))) {
retval = -EFAULT;
break;
}
if (!(slave = ec_master_find_slave(
master, 0, data.slave_position))) {
EC_ERR("Slave %u does not exist!\n", data.slave_position);
retval = -EINVAL;
break;
}
if (data.sync_index >= slave->sii.sync_count) {
EC_ERR("Sync manager %u does not exist in slave %u!\n",
data.sync_index, data.slave_position);
retval = -EINVAL;
break;
}
sync = &slave->sii.syncs[data.sync_index];
if (!(pdo = ec_pdo_list_find_pdo_by_pos_const(
&sync->pdos, data.pdo_pos))) {
EC_ERR("Sync manager %u does not contain a Pdo with "
"position %u in slave %u!\n", data.sync_index,
data.pdo_pos, data.slave_position);
retval = -EINVAL;
break;
}
data.dir = pdo->dir;
data.index = pdo->index;
data.entry_count = ec_pdo_entry_count(pdo);
if (pdo->name) {
strncpy(data.name, pdo->name, EC_IOCTL_PDO_NAME_SIZE);
data.name[EC_IOCTL_PDO_NAME_SIZE - 1] = 0;
} else {
data.name[0] = 0;
}
if (copy_to_user((void __user *) arg, &data, sizeof(data))) {
retval = -EFAULT;
break;
}
break;
}
case EC_IOCTL_PDO_ENTRY:
{
ec_ioctl_pdo_entry_t data;
const ec_slave_t *slave;
const ec_sync_t *sync;
const ec_pdo_t *pdo;
const ec_pdo_entry_t *entry;
if (copy_from_user(&data, (void __user *) arg, sizeof(data))) {
retval = -EFAULT;
break;
}
if (!(slave = ec_master_find_slave(
master, 0, data.slave_position))) {
EC_ERR("Slave %u does not exist!\n", data.slave_position);
retval = -EINVAL;
break;
}
if (data.sync_index >= slave->sii.sync_count) {
EC_ERR("Sync manager %u does not exist in slave %u!\n",
data.sync_index, data.slave_position);
retval = -EINVAL;
break;
}
sync = &slave->sii.syncs[data.sync_index];
if (!(pdo = ec_pdo_list_find_pdo_by_pos_const(
&sync->pdos, data.pdo_pos))) {
EC_ERR("Sync manager %u does not contain a Pdo with "
"position %u in slave %u!\n", data.sync_index,
data.pdo_pos, data.slave_position);
retval = -EINVAL;
break;
}
if (!(entry = ec_pdo_find_entry_by_pos_const(
pdo, data.entry_pos))) {
EC_ERR("Pdo 0x%04X does not contain an entry with "
"position %u in slave %u!\n", data.pdo_pos,
data.entry_pos, data.slave_position);
retval = -EINVAL;
break;
}
data.index = entry->index;
data.subindex = entry->subindex;
data.bit_length = entry->bit_length;
if (entry->name) {
strncpy(data.name, entry->name,
EC_IOCTL_PDO_ENTRY_NAME_SIZE);
data.name[EC_IOCTL_PDO_ENTRY_NAME_SIZE - 1] = 0;
} else {
data.name[0] = 0;
}
if (copy_to_user((void __user *) arg, &data, sizeof(data))) {
retval = -EFAULT;
break;
}
break;
}
case EC_IOCTL_DOMAIN_COUNT:
retval = ec_master_domain_count(master);
break;
case EC_IOCTL_DOMAIN:
{
ec_ioctl_domain_t data;
const ec_domain_t *domain;
if (copy_from_user(&data, (void __user *) arg, sizeof(data))) {
retval = -EFAULT;
break;
}
if (!(domain = ec_master_find_domain(master, data.index))) {
EC_ERR("Domain %u does not exist!\n", data.index);
retval = -EINVAL;
break;
}
data.data_size = domain->data_size;
data.logical_base_address = domain->logical_base_address;
data.working_counter = domain->working_counter;
data.expected_working_counter = domain->expected_working_counter;
if (copy_to_user((void __user *) arg, &data, sizeof(data))) {
retval = -EFAULT;
break;
}
break;
}
case EC_IOCTL_DATA:
{
ec_ioctl_data_t data;
const ec_domain_t *domain;
if (copy_from_user(&data, (void __user *) arg, sizeof(data))) {
retval = -EFAULT;
break;
}
if (!(domain = ec_master_find_domain(master, data.domain_index))) {
EC_ERR("Domain %u does not exist!\n", data.domain_index);
retval = -EINVAL;
break;
}
if (domain->data_size != data.data_size) {
EC_ERR("Data size mismatch %u/%u!\n",
data.data_size, domain->data_size);
retval = -EFAULT;
break;
}
if (copy_to_user((void __user *) data.target, domain->data,
domain->data_size)) {
retval = -EFAULT;
break;
}
break;
}
default:
retval = -ENOIOCTLCMD;
}
return retval;
}
/*****************************************************************************/
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