| // 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"); |