// SPDX-License-Identifier: GPL-2.0+
/*
 * comedi/drivers/contec_pci_dio.c
 *
 * COMEDI - Linux Control and Measurement Device Interface
 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
 */

/*
 * Driver: contec_pci_dio
 * Description: Contec PIO1616L digital I/O board
 * Devices: [Contec] PIO1616L (contec_pci_dio)
 * Author: Stefano Rivoir <s.rivoir@gts.it>
 * Updated: Wed, 27 Jun 2007 13:00:06 +0100
 * Status: works
 *
 * Configuration Options: not applicable, uses comedi PCI auto config
 */

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

/*
 * Register map
 */
#define PIO1616L_DI_REG         0x00
#define PIO1616L_DO_REG         0x02

static int contec_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))
                outw(s->state, dev->iobase + PIO1616L_DO_REG);

        data[1] = s->state;

        return insn->n;
}

static int contec_di_insn_bits(struct comedi_device *dev,
                               struct comedi_subdevice *s,
                               struct comedi_insn *insn, unsigned int *data)
{
        data[1] = inw(dev->iobase + PIO1616L_DI_REG);

        return insn->n;
}

static int contec_auto_attach(struct comedi_device *dev,
                              unsigned long context_unused)
{
        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
        struct comedi_subdevice *s;
        int ret;

        ret = comedi_pci_enable(dev);
        if (ret)
                return ret;
        dev->iobase = pci_resource_start(pcidev, 0);

        ret = comedi_alloc_subdevices(dev, 2);
        if (ret)
                return ret;

        s = &dev->subdevices[0];
        s->type         = COMEDI_SUBD_DI;
        s->subdev_flags = SDF_READABLE;
        s->n_chan       = 16;
        s->maxdata      = 1;
        s->range_table  = &range_digital;
        s->insn_bits    = contec_di_insn_bits;

        s = &dev->subdevices[1];
        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    = contec_do_insn_bits;

        return 0;
}

static struct comedi_driver contec_pci_dio_driver = {
        .driver_name    = "contec_pci_dio",
        .module         = THIS_MODULE,
        .auto_attach    = contec_auto_attach,
        .detach         = comedi_pci_detach,
};

static int contec_pci_dio_pci_probe(struct pci_dev *dev,
                                    const struct pci_device_id *id)
{
        return comedi_pci_auto_config(dev, &contec_pci_dio_driver,
                                      id->driver_data);
}

static const struct pci_device_id contec_pci_dio_pci_table[] = {
        { PCI_DEVICE(PCI_VENDOR_ID_CONTEC, 0x8172) },
        { 0 }
};
MODULE_DEVICE_TABLE(pci, contec_pci_dio_pci_table);

static struct pci_driver contec_pci_dio_pci_driver = {
        .name           = "contec_pci_dio",
        .id_table       = contec_pci_dio_pci_table,
        .probe          = contec_pci_dio_pci_probe,
        .remove         = comedi_pci_auto_unconfig,
};
module_comedi_pci_driver(contec_pci_dio_driver, contec_pci_dio_pci_driver);

MODULE_AUTHOR("Comedi https://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");