102 lines
2.4 KiB
C
102 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Driver for Amplicon PC263 relay board.
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*
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* Copyright (C) 2002 MEV Ltd. <https://www.mev.co.uk/>
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*
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* COMEDI - Linux Control and Measurement Device Interface
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* Copyright (C) 2000 David A. Schleef <ds@schleef.org>
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*/
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/*
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* Driver: amplc_pc263
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* Description: Amplicon PC263
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* Author: Ian Abbott <abbotti@mev.co.uk>
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* Devices: [Amplicon] PC263 (pc263)
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* Updated: Fri, 12 Apr 2013 15:19:36 +0100
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* Status: works
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*
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* Configuration options:
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* [0] - I/O port base address
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*
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* The board appears as one subdevice, with 16 digital outputs, each
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* connected to a reed-relay. Relay contacts are closed when output is 1.
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* The state of the outputs can be read.
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*/
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#include <linux/module.h>
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#include <linux/comedi/comedidev.h>
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/* PC263 registers */
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#define PC263_DO_0_7_REG 0x00
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#define PC263_DO_8_15_REG 0x01
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struct pc263_board {
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const char *name;
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};
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static const struct pc263_board pc263_boards[] = {
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{
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.name = "pc263",
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},
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};
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static int pc263_do_insn_bits(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn,
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unsigned int *data)
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{
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if (comedi_dio_update_state(s, data)) {
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outb(s->state & 0xff, dev->iobase + PC263_DO_0_7_REG);
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outb((s->state >> 8) & 0xff, dev->iobase + PC263_DO_8_15_REG);
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}
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data[1] = s->state;
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return insn->n;
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}
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static int pc263_attach(struct comedi_device *dev, struct comedi_devconfig *it)
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{
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struct comedi_subdevice *s;
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int ret;
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ret = comedi_request_region(dev, it->options[0], 0x2);
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if (ret)
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return ret;
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ret = comedi_alloc_subdevices(dev, 1);
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if (ret)
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return ret;
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/* Digital Output subdevice */
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s = &dev->subdevices[0];
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s->type = COMEDI_SUBD_DO;
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s->subdev_flags = SDF_WRITABLE;
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s->n_chan = 16;
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s->maxdata = 1;
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s->range_table = &range_digital;
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s->insn_bits = pc263_do_insn_bits;
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/* read initial relay state */
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s->state = inb(dev->iobase + PC263_DO_0_7_REG) |
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(inb(dev->iobase + PC263_DO_8_15_REG) << 8);
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return 0;
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}
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static struct comedi_driver amplc_pc263_driver = {
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.driver_name = "amplc_pc263",
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.module = THIS_MODULE,
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.attach = pc263_attach,
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.detach = comedi_legacy_detach,
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.board_name = &pc263_boards[0].name,
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.offset = sizeof(struct pc263_board),
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.num_names = ARRAY_SIZE(pc263_boards),
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};
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module_comedi_driver(amplc_pc263_driver);
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MODULE_AUTHOR("Comedi https://www.comedi.org");
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MODULE_DESCRIPTION("Comedi driver for Amplicon PC263 relay board");
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MODULE_LICENSE("GPL");
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