linux/drivers/comedi/drivers/pcl730.c

// SPDX-License-Identifier: GPL-2.0
/*
 * comedi/drivers/pcl730.c
 * Driver for Advantech PCL-730 and clones
 * José Luis Sánchez
 */

/*
 * Driver: pcl730
 * Description: Advantech PCL-730 (& compatibles)
 * Devices: [Advantech] PCL-730 (pcl730), PCM-3730 (pcm3730), PCL-725 (pcl725),
 *   PCL-733 (pcl733), PCL-734 (pcl734),
 *   [ADLink] ACL-7130 (acl7130), ACL-7225b (acl7225b),
 *   [ICP] ISO-730 (iso730), P8R8-DIO (p8r8dio), P16R16-DIO (p16r16dio),
 *   [Diamond Systems] OPMM-1616-XT (opmm-1616-xt), PEARL-MM-P (pearl-mm-p),
 *   IR104-PBF (ir104-pbf),
 * Author: José Luis Sánchez ([email protected])
 * Status: untested
 *
 * Configuration options:
 *   [0] - I/O port base
 *
 * Interrupts are not supported.
 * The ACL-7130 card has an 8254 timer/counter not supported by this driver.
 */

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

/*
 * Register map
 *
 * The register map varies slightly depending on the board type but
 * all registers are 8-bit.
 *
 * The boardinfo 'io_range' is used to allow comedi to request the
 * proper range required by the board.
 *
 * The comedi_subdevice 'private' data is used to pass the register
 * offset to the (*insn_bits) functions to read/write the correct
 * registers.
 *
 * The basic register mapping looks like this:
 *
 *     BASE+0  Isolated outputs 0-7 (write) / inputs 0-7 (read)
 *     BASE+1  Isolated outputs 8-15 (write) / inputs 8-15 (read)
 *     BASE+2  TTL outputs 0-7 (write) / inputs 0-7 (read)
 *     BASE+3  TTL outputs 8-15 (write) / inputs 8-15 (read)
 *
 * The pcm3730 board does not have register BASE+1.
 *
 * The pcl725 and p8r8dio only have registers BASE+0 and BASE+1:
 *
 *     BASE+0  Isolated outputs 0-7 (write) (read back on p8r8dio)
 *     BASE+1  Isolated inputs 0-7 (read)
 *
 * The acl7225b and p16r16dio boards have this register mapping:
 *
 *     BASE+0  Isolated outputs 0-7 (write) (read back)
 *     BASE+1  Isolated outputs 8-15 (write) (read back)
 *     BASE+2  Isolated inputs 0-7 (read)
 *     BASE+3  Isolated inputs 8-15 (read)
 *
 * The pcl733 and pcl733 boards have this register mapping:
 *
 *     BASE+0  Isolated outputs 0-7 (write) or inputs 0-7 (read)
 *     BASE+1  Isolated outputs 8-15 (write) or inputs 8-15 (read)
 *     BASE+2  Isolated outputs 16-23 (write) or inputs 16-23 (read)
 *     BASE+3  Isolated outputs 24-31 (write) or inputs 24-31 (read)
 *
 * The opmm-1616-xt board has this register mapping:
 *
 *     BASE+0  Isolated outputs 0-7 (write) (read back)
 *     BASE+1  Isolated outputs 8-15 (write) (read back)
 *     BASE+2  Isolated inputs 0-7 (read)
 *     BASE+3  Isolated inputs 8-15 (read)
 *
 *     These registers are not currently supported:
 *
 *     BASE+2  Relay select register (write)
 *     BASE+3  Board reset control register (write)
 *     BASE+4  Interrupt control register (write)
 *     BASE+4  Change detect 7-0 status register (read)
 *     BASE+5  LED control register (write)
 *     BASE+5  Change detect 15-8 status register (read)
 *
 * The pearl-mm-p board has this register mapping:
 *
 *     BASE+0  Isolated outputs 0-7 (write)
 *     BASE+1  Isolated outputs 8-15 (write)
 *
 * The ir104-pbf board has this register mapping:
 *
 *     BASE+0  Isolated outputs 0-7 (write) (read back)
 *     BASE+1  Isolated outputs 8-15 (write) (read back)
 *     BASE+2  Isolated outputs 16-19 (write) (read back)
 *     BASE+4  Isolated inputs 0-7 (read)
 *     BASE+5  Isolated inputs 8-15 (read)
 *     BASE+6  Isolated inputs 16-19 (read)
 */

struct pcl730_board { … };

static const struct pcl730_board pcl730_boards[] = …;

static int pcl730_do_insn_bits(struct comedi_device *dev,
			       struct comedi_subdevice *s,
			       struct comedi_insn *insn,
			       unsigned int *data)
{ … }

static unsigned int pcl730_get_bits(struct comedi_device *dev,
				    struct comedi_subdevice *s)
{ … }

static int pcl730_di_insn_bits(struct comedi_device *dev,
			       struct comedi_subdevice *s,
			       struct comedi_insn *insn,
			       unsigned int *data)
{ … }

static int pcl730_attach(struct comedi_device *dev,
			 struct comedi_devconfig *it)
{ … }

static struct comedi_driver pcl730_driver = …;
module_comedi_driver(…);

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;