blob: c377af1d5246e5e8f87ee06d8a19c3188347efd6 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* comedi/drivers/amplc_pc236.c
* Driver for Amplicon PC36AT DIO boards.
*
* Copyright (C) 2002 MEV Ltd. <https://www.mev.co.uk/>
*
* COMEDI - Linux Control and Measurement Device Interface
* Copyright (C) 2000 David A. Schleef <ds@schleef.org>
*/
/*
* Driver: amplc_pc236
* Description: Amplicon PC36AT
* Author: Ian Abbott <abbotti@mev.co.uk>
* Devices: [Amplicon] PC36AT (pc36at)
* Updated: Fri, 25 Jul 2014 15:32:40 +0000
* Status: works
*
* Configuration options - PC36AT:
* [0] - I/O port base address
* [1] - IRQ (optional)
*
* The PC36AT board has a single 8255 appearing as subdevice 0.
*
* Subdevice 1 pretends to be a digital input device, but it always returns
* 0 when read. However, if you run a command with scan_begin_src=TRIG_EXT,
* a rising edge on port C bit 3 acts as an external trigger, which can be
* used to wake up tasks. This is like the comedi_parport device, but the
* only way to physically disable the interrupt on the PC36AT is to remove
* the IRQ jumper. If no interrupt is connected, then subdevice 1 is
* unused.
*/
#include <linux/module.h>
#include "../comedidev.h"
#include "amplc_pc236.h"
static int pc236_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
struct pc236_private *devpriv;
int ret;
devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
if (!devpriv)
return -ENOMEM;
ret = comedi_request_region(dev, it->options[0], 0x4);
if (ret)
return ret;
return amplc_pc236_common_attach(dev, dev->iobase, it->options[1], 0);
}
static const struct pc236_board pc236_boards[] = {
{
.name = "pc36at",
},
};
static struct comedi_driver amplc_pc236_driver = {
.driver_name = "amplc_pc236",
.module = THIS_MODULE,
.attach = pc236_attach,
.detach = comedi_legacy_detach,
.board_name = &pc236_boards[0].name,
.offset = sizeof(struct pc236_board),
.num_names = ARRAY_SIZE(pc236_boards),
};
module_comedi_driver(amplc_pc236_driver);
MODULE_AUTHOR("Comedi https://www.comedi.org");
MODULE_DESCRIPTION("Comedi driver for Amplicon PC36AT DIO boards");
MODULE_LICENSE("GPL");