// SPDX-License-Identifier: GPL-2.0+
/*
 * addi_apci_2200.c
 * Copyright (C) 2004,2005  ADDI-DATA GmbH for the source code of this module.
 * Project manager: Eric Stolz
 *
 *      ADDI-DATA GmbH
 *      Dieselstrasse 3
 *      D-77833 Ottersweier
 *      Tel: +19(0)7223/9493-0
 *      Fax: +49(0)7223/9493-92
 *      http://www.addi-data.com
 *      info@addi-data.com
 */

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

#include "addi_watchdog.h"

/*
 * I/O Register Map
 */
#define APCI2200_DI_REG                 0x00
#define APCI2200_DO_REG                 0x04
#define APCI2200_WDOG_REG               0x08

static int apci2200_di_insn_bits(struct comedi_device *dev,
                                 struct comedi_subdevice *s,
                                 struct comedi_insn *insn,
                                 unsigned int *data)
{
        data[1] = inw(dev->iobase + APCI2200_DI_REG);

        return insn->n;
}

static int apci2200_do_insn_bits(struct comedi_device *dev,
                                 struct comedi_subdevice *s,
                                 struct comedi_insn *insn,
                                 unsigned int *data)
{
        s->state = inw(dev->iobase + APCI2200_DO_REG);

        if (comedi_dio_update_state(s, data))
                outw(s->state, dev->iobase + APCI2200_DO_REG);

        data[1] = s->state;

        return insn->n;
}

static int apci2200_reset(struct comedi_device *dev)
{
        outw(0x0, dev->iobase + APCI2200_DO_REG);

        addi_watchdog_reset(dev->iobase + APCI2200_WDOG_REG);

        return 0;
}

static int apci2200_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, 1);

        ret = comedi_alloc_subdevices(dev, 3);
        if (ret)
                return ret;

        /* Initialize the digital input subdevice */
        s = &dev->subdevices[0];
        s->type         = COMEDI_SUBD_DI;
        s->subdev_flags = SDF_READABLE;
        s->n_chan       = 8;
        s->maxdata      = 1;
        s->range_table  = &range_digital;
        s->insn_bits    = apci2200_di_insn_bits;

        /* Initialize the digital output subdevice */
        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    = apci2200_do_insn_bits;

        /* Initialize the watchdog subdevice */
        s = &dev->subdevices[2];
        ret = addi_watchdog_init(s, dev->iobase + APCI2200_WDOG_REG);
        if (ret)
                return ret;

        apci2200_reset(dev);
        return 0;
}

static void apci2200_detach(struct comedi_device *dev)
{
        if (dev->iobase)
                apci2200_reset(dev);
        comedi_pci_detach(dev);
}

static struct comedi_driver apci2200_driver = {
        .driver_name    = "addi_apci_2200",
        .module         = THIS_MODULE,
        .auto_attach    = apci2200_auto_attach,
        .detach         = apci2200_detach,
};

static int apci2200_pci_probe(struct pci_dev *dev,
                              const struct pci_device_id *id)
{
        return comedi_pci_auto_config(dev, &apci2200_driver, id->driver_data);
}

static const struct pci_device_id apci2200_pci_table[] = {
        { PCI_DEVICE(PCI_VENDOR_ID_ADDIDATA, 0x1005) },
        { 0 }
};
MODULE_DEVICE_TABLE(pci, apci2200_pci_table);

static struct pci_driver apci2200_pci_driver = {
        .name           = "addi_apci_2200",
        .id_table       = apci2200_pci_table,
        .probe          = apci2200_pci_probe,
        .remove         = comedi_pci_auto_unconfig,
};
module_comedi_pci_driver(apci2200_driver, apci2200_pci_driver);

MODULE_DESCRIPTION("ADDI-DATA APCI-2200 Relay board, optically isolated");
MODULE_AUTHOR("Comedi https://www.comedi.org");
MODULE_LICENSE("GPL");