[mirror_ubuntu-hirsute-kernel.git] / drivers / staging / comedi / drivers / amplc_pc263.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Driver for Amplicon PC263 relay board.
 *
 * Copyright (C) 2002 MEV Ltd. <http://www.mev.co.uk/>
 *
 * COMEDI - Linux Control and Measurement Device Interface
 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
 */

/*
 * Driver: amplc_pc263
 * Description: Amplicon PC263
 * Author: Ian Abbott <abbotti@mev.co.uk>
 * Devices: [Amplicon] PC263 (pc263)
 * Updated: Fri, 12 Apr 2013 15:19:36 +0100
 * Status: works
 *
 * Configuration options:
 *   [0] - I/O port base address
 *
 * The board appears as one subdevice, with 16 digital outputs, each
 * connected to a reed-relay. Relay contacts are closed when output is 1.
 * The state of the outputs can be read.
 */

#include <linux/module.h>
#include "../comedidev.h"

/* PC263 registers */
#define PC263_DO_0_7_REG	0x00
#define PC263_DO_8_15_REG	0x01

struct pc263_board {
	const char *name;
};

static const struct pc263_board pc263_boards[] = {
	{
		.name = "pc263",
	},
};

static int pc263_do_insn_bits(struct comedi_device *dev,
			      struct comedi_subdevice *s,
			      struct comedi_insn *insn,
			      unsigned int *data)
{
	if (comedi_dio_update_state(s, data)) {
		outb(s->state & 0xff, dev->iobase + PC263_DO_0_7_REG);
		outb((s->state >> 8) & 0xff, dev->iobase + PC263_DO_8_15_REG);
	}

	data[1] = s->state;

	return insn->n;
}

static int pc263_attach(struct comedi_device *dev, struct comedi_devconfig *it)
{
	struct comedi_subdevice *s;
	int ret;

	ret = comedi_request_region(dev, it->options[0], 0x2);
	if (ret)
		return ret;

	ret = comedi_alloc_subdevices(dev, 1);
	if (ret)
		return ret;

	/* Digital Output subdevice */
	s = &dev->subdevices[0];
	s->type		= COMEDI_SUBD_DO;
	s->subdev_flags	= SDF_WRITABLE;
	s->n_chan	= 16;
	s->maxdata	= 1;
	s->range_table	= &range_digital;
	s->insn_bits	= pc263_do_insn_bits;

	/* read initial relay state */
	s->state = inb(dev->iobase + PC263_DO_0_7_REG) |
		   (inb(dev->iobase + PC263_DO_8_15_REG) << 8);

	return 0;
}

static struct comedi_driver amplc_pc263_driver = {
	.driver_name	= "amplc_pc263",
	.module		= THIS_MODULE,
	.attach		= pc263_attach,
	.detach		= comedi_legacy_detach,
	.board_name	= &pc263_boards[0].name,
	.offset		= sizeof(struct pc263_board),
	.num_names	= ARRAY_SIZE(pc263_boards),
};

module_comedi_driver(amplc_pc263_driver);

MODULE_AUTHOR("Comedi http://www.comedi.org");
MODULE_DESCRIPTION("Comedi driver for Amplicon PC263 relay board");
MODULE_LICENSE("GPL");
Commit	Line	Data
e184e2be	1	// SPDX-License-Identifier: GPL-2.0+
cfd02b71	2	/*
05380cde HS	3	* Driver for Amplicon PC263 relay board.
	4	*
	5	* Copyright (C) 2002 MEV Ltd. <http://www.mev.co.uk/>
	6	*
	7	* COMEDI - Linux Control and Measurement Device Interface
	8	* Copyright (C) 2000 David A. Schleef <ds@schleef.org>
05380cde	9	*/
cfd02b71	10
cfd02b71	11	/*
05380cde HS	12	* Driver: amplc_pc263
	13	* Description: Amplicon PC263
	14	* Author: Ian Abbott <abbotti@mev.co.uk>
	15	* Devices: [Amplicon] PC263 (pc263)
	16	* Updated: Fri, 12 Apr 2013 15:19:36 +0100
	17	* Status: works
	18	*
	19	* Configuration options:
	20	* [0] - I/O port base address
	21	*
	22	* The board appears as one subdevice, with 16 digital outputs, each
	23	* connected to a reed-relay. Relay contacts are closed when output is 1.
	24	* The state of the outputs can be read.
	25	*/
cfd02b71	26
ce157f80	27	#include <linux/module.h>
cfd02b71 IA	28	#include "../comedidev.h"
cfd02b71 IA	29
22691aec	30	/* PC263 registers */
1b501671 HS	31	#define PC263_DO_0_7_REG 0x00
1b501671 HS	32	#define PC263_DO_8_15_REG 0x01
cfd02b71	33
4beb86c2	34	struct pc263_board {
cfd02b71	35	const char *name;
4beb86c2	36	};
22691aec	37
4beb86c2	38	static const struct pc263_board pc263_boards[] = {
cfd02b71	39	{
b4843c19	40	.name = "pc263",
b4843c19	41	},
cfd02b71 IA	42	};
cfd02b71 IA	43
ba7914cd IA	44	static int pc263_do_insn_bits(struct comedi_device *dev,
ba7914cd IA	45	struct comedi_subdevice *s,
97f4289a HS	46	struct comedi_insn *insn,
97f4289a HS	47	unsigned int *data)
ba7914cd	48	{
97f4289a	49	if (comedi_dio_update_state(s, data)) {
1b501671 HS	50	outb(s->state & 0xff, dev->iobase + PC263_DO_0_7_REG);
1b501671 HS	51	outb((s->state >> 8) & 0xff, dev->iobase + PC263_DO_8_15_REG);
ba7914cd	52	}
97f4289a HS	53
	54	data[1] = s->state;
	55
a2714e3e	56	return insn->n;
ba7914cd	57	}
cfd02b71	58
22691aec	59	static int pc263_attach(struct comedi_device dev, struct comedi_devconfig it)
d8967b6e	60	{
d8967b6e IA	61	struct comedi_subdevice *s;
	62	int ret;
	63
862755ec	64	ret = comedi_request_region(dev, it->options[0], 0x2);
22691aec IA	65	if (ret)
22691aec IA	66	return ret;
d8967b6e	67
2f0b9d08	68	ret = comedi_alloc_subdevices(dev, 1);
8b6c5694	69	if (ret)
d8967b6e	70	return ret;
d8967b6e	71
9f37d399	72	/* Digital Output subdevice */
d8029dcf	73	s = &dev->subdevices[0];
9f37d399 HS	74	s->type = COMEDI_SUBD_DO;
	75	s->subdev_flags = SDF_WRITABLE;
	76	s->n_chan = 16;
	77	s->maxdata = 1;
	78	s->range_table = &range_digital;
	79	s->insn_bits = pc263_do_insn_bits;
	80
d8967b6e	81	/* read initial relay state */
1b501671 HS	82	s->state = inb(dev->iobase + PC263_DO_0_7_REG) \|
1b501671 HS	83	(inb(dev->iobase + PC263_DO_8_15_REG) << 8);
d8967b6e	84
22691aec	85	return 0;
cfd02b71 IA	86	}
cfd02b71 IA	87
ba7914cd	88	static struct comedi_driver amplc_pc263_driver = {
d69917a6 HS	89	.driver_name = "amplc_pc263",
	90	.module = THIS_MODULE,
	91	.attach = pc263_attach,
	92	.detach = comedi_legacy_detach,
	93	.board_name = &pc263_boards[0].name,
	94	.offset = sizeof(struct pc263_board),
	95	.num_names = ARRAY_SIZE(pc263_boards),
ba7914cd	96	};
cfd02b71	97
40372f5f	98	module_comedi_driver(amplc_pc263_driver);
90f703d3 AT	99
90f703d3 AT	100	MODULE_AUTHOR("Comedi http://www.comedi.org");
22691aec	101	MODULE_DESCRIPTION("Comedi driver for Amplicon PC263 relay board");
90f703d3	102	MODULE_LICENSE("GPL");