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/*
comedi/drivers/das08_cs.c
DAS08 driver
COMEDI - Linux Control and Measurement Device Interface
Copyright (C) 2000 David A. Schleef <ds@schleef.org>
Copyright (C) 2001,2002,2003 Frank Mori Hess <fmhess@users.sourceforge.net>
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 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*****************************************************************
*/
/*
Driver: das08_cs
Description: DAS-08 PCMCIA boards
Author: Warren Jasper, ds, Frank Hess
Devices: [ComputerBoards] PCM-DAS08 (pcm-das08)
Status: works
This is the PCMCIA-specific support split off from the
das08 driver.
Options (for pcm-das08):
NONE
Command support does not exist, but could be added for this board.
*/
#include "../comedidev.h"
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include "das08.h"
/* pcmcia includes */
#include <pcmcia/cistpl.h>
#include <pcmcia/ds.h>
static struct pcmcia_device *cur_dev;
#define thisboard ((const struct das08_board_struct *)dev->board_ptr)
static int das08_cs_attach(struct comedi_device *dev,
struct comedi_devconfig *it);
static struct comedi_driver driver_das08_cs = {
.driver_name = "das08_cs",
.module = THIS_MODULE,
.attach = das08_cs_attach,
.detach = das08_common_detach,
.board_name = &das08_cs_boards[0].name,
.num_names = ARRAY_SIZE(das08_cs_boards),
.offset = sizeof(struct das08_board_struct),
};
static int das08_cs_attach(struct comedi_device *dev,
struct comedi_devconfig *it)
{
int ret;
unsigned long iobase;
struct pcmcia_device *link = cur_dev; /* XXX hack */
ret = alloc_private(dev, sizeof(struct das08_private_struct));
if (ret < 0)
return ret;
dev_info(dev->hw_dev, "comedi%d: das08_cs:\n", dev->minor);
/* deal with a pci board */
if (thisboard->bustype == pcmcia) {
if (link == NULL) {
dev_err(dev->hw_dev, "no pcmcia cards found\n");
return -EIO;
}
iobase = link->resource[0]->start;
} else {
dev_err(dev->hw_dev, "bug! board does not have PCMCIA bustype\n");
return -EINVAL;
}
return das08_common_attach(dev, iobase);
}
/*======================================================================
The following pcmcia code for the pcm-das08 is adapted from the
dummy_cs.c driver of the Linux PCMCIA Card Services package.
The initial developer of the original code is David A. Hinds
<dahinds@users.sourceforge.net>. Portions created by David A. Hinds
are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
======================================================================*/
static void das08_pcmcia_config(struct pcmcia_device *link);
static void das08_pcmcia_release(struct pcmcia_device *link);
static int das08_pcmcia_suspend(struct pcmcia_device *p_dev);
static int das08_pcmcia_resume(struct pcmcia_device *p_dev);
static int das08_pcmcia_attach(struct pcmcia_device *);
static void das08_pcmcia_detach(struct pcmcia_device *);
struct local_info_t {
struct pcmcia_device *link;
int stop;
struct bus_operations *bus;
};
static int das08_pcmcia_attach(struct pcmcia_device *link)
{
struct local_info_t *local;
dev_dbg(&link->dev, "das08_pcmcia_attach()\n");
/* Allocate space for private device-specific data */
local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
if (!local)
return -ENOMEM;
local->link = link;
link->priv = local;
cur_dev = link;
das08_pcmcia_config(link);
return 0;
} /* das08_pcmcia_attach */
static void das08_pcmcia_detach(struct pcmcia_device *link)
{
dev_dbg(&link->dev, "das08_pcmcia_detach\n");
((struct local_info_t *)link->priv)->stop = 1;
das08_pcmcia_release(link);
/* This points to the parent struct local_info_t struct */
kfree(link->priv);
} /* das08_pcmcia_detach */
static int das08_pcmcia_config_loop(struct pcmcia_device *p_dev,
void *priv_data)
{
if (p_dev->config_index == 0)
return -EINVAL;
return pcmcia_request_io(p_dev);
}
static void das08_pcmcia_config(struct pcmcia_device *link)
{
int ret;
dev_dbg(&link->dev, "das08_pcmcia_config\n");
link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
ret = pcmcia_loop_config(link, das08_pcmcia_config_loop, NULL);
if (ret) {
dev_warn(&link->dev, "no configuration found\n");
goto failed;
}
if (!link->irq)
goto failed;
ret = pcmcia_enable_device(link);
if (ret)
goto failed;
return;
failed:
das08_pcmcia_release(link);
} /* das08_pcmcia_config */
static void das08_pcmcia_release(struct pcmcia_device *link)
{
dev_dbg(&link->dev, "das08_pcmcia_release\n");
pcmcia_disable_device(link);
} /* das08_pcmcia_release */
static int das08_pcmcia_suspend(struct pcmcia_device *link)
{
struct local_info_t *local = link->priv;
/* Mark the device as stopped, to block IO until later */
local->stop = 1;
return 0;
} /* das08_pcmcia_suspend */
static int das08_pcmcia_resume(struct pcmcia_device *link)
{
struct local_info_t *local = link->priv;
local->stop = 0;
return 0;
} /* das08_pcmcia_resume */
/*====================================================================*/
static const struct pcmcia_device_id das08_cs_id_table[] = {
PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001),
PCMCIA_DEVICE_NULL
};
MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table);
MODULE_AUTHOR("David A. Schleef <ds@schleef.org>, "
"Frank Mori Hess <fmhess@users.sourceforge.net>");
MODULE_DESCRIPTION("Comedi driver for ComputerBoards DAS-08 PCMCIA boards");
MODULE_LICENSE("GPL");
struct pcmcia_driver das08_cs_driver = {
.probe = das08_pcmcia_attach,
.remove = das08_pcmcia_detach,
.suspend = das08_pcmcia_suspend,
.resume = das08_pcmcia_resume,
.id_table = das08_cs_id_table,
.owner = THIS_MODULE,
.name = "pcm-das08",
};
static int __init init_das08_pcmcia_cs(void)
{
pcmcia_register_driver(&das08_cs_driver);
return 0;
}
static void __exit exit_das08_pcmcia_cs(void)
{
pr_debug("das08_pcmcia_cs: unloading\n");
pcmcia_unregister_driver(&das08_cs_driver);
}
static int __init das08_cs_init_module(void)
{
int ret;
ret = init_das08_pcmcia_cs();
if (ret < 0)
return ret;
return comedi_driver_register(&driver_das08_cs);
}
static void __exit das08_cs_exit_module(void)
{
exit_das08_pcmcia_cs();
comedi_driver_unregister(&driver_das08_cs);
}
module_init(das08_cs_init_module);
module_exit(das08_cs_exit_module);
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