// SPDX-License-Identifier: GPL-2.0+
/*
 * comedi/drivers/ni_labpc_pci.c
 * Driver for National Instruments Lab-PC PCI-1200
 * Copyright (C) 2001, 2002, 2003 Frank Mori Hess <fmhess@users.sourceforge.net>
 */

/*
 * Driver: ni_labpc_pci
 * Description: National Instruments Lab-PC PCI-1200
 * Devices: [National Instruments] PCI-1200 (ni_pci-1200)
 * Author: Frank Mori Hess <fmhess@users.sourceforge.net>
 * Status: works
 *
 * This is the PCI-specific support split off from the ni_labpc driver.
 *
 * Configuration Options: not applicable, uses PCI auto config
 *
 * NI manuals:
 * 340914a (pci-1200)
 */

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

#include "ni_labpc.h"

enum labpc_pci_boardid {
        BOARD_NI_PCI1200,
};

static const struct labpc_boardinfo labpc_pci_boards[] = {
        [BOARD_NI_PCI1200] = {
                .name                   = "ni_pci-1200",
                .ai_speed               = 10000,
                .ai_scan_up             = 1,
                .has_ao                 = 1,
                .is_labpc1200           = 1,
        },
};

/* ripped from mite.h and mite_setup2() to avoid mite dependency */
#define MITE_IODWBSR    0xc0    /* IO Device Window Base Size Register */
#define WENAB           BIT(7)  /* window enable */

static int labpc_pci_mite_init(struct pci_dev *pcidev)
{
        void __iomem *mite_base;
        u32 main_phys_addr;

        /* ioremap the MITE registers (BAR 0) temporarily */
        mite_base = pci_ioremap_bar(pcidev, 0);
        if (!mite_base)
                return -ENOMEM;

        /* set data window to main registers (BAR 1) */
        main_phys_addr = pci_resource_start(pcidev, 1);
        writel(main_phys_addr | WENAB, mite_base + MITE_IODWBSR);

        /* finished with MITE registers */
        iounmap(mite_base);
        return 0;
}

static int labpc_pci_auto_attach(struct comedi_device *dev,
                                 unsigned long context)
{
        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
        const struct labpc_boardinfo *board = NULL;
        int ret;

        if (context < ARRAY_SIZE(labpc_pci_boards))
                board = &labpc_pci_boards[context];
        if (!board)
                return -ENODEV;
        dev->board_ptr = board;
        dev->board_name = board->name;

        ret = comedi_pci_enable(dev);
        if (ret)
                return ret;

        ret = labpc_pci_mite_init(pcidev);
        if (ret)
                return ret;

        dev->mmio = pci_ioremap_bar(pcidev, 1);
        if (!dev->mmio)
                return -ENOMEM;

        return labpc_common_attach(dev, pcidev->irq, IRQF_SHARED);
}

static void labpc_pci_detach(struct comedi_device *dev)
{
        labpc_common_detach(dev);
        comedi_pci_detach(dev);
}

static struct comedi_driver labpc_pci_comedi_driver = {
        .driver_name    = "labpc_pci",
        .module         = THIS_MODULE,
        .auto_attach    = labpc_pci_auto_attach,
        .detach         = labpc_pci_detach,
};

static const struct pci_device_id labpc_pci_table[] = {
        { PCI_VDEVICE(NI, 0x161), BOARD_NI_PCI1200 },
        { 0 }
};
MODULE_DEVICE_TABLE(pci, labpc_pci_table);

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

static struct pci_driver labpc_pci_driver = {
        .name           = "labpc_pci",
        .id_table       = labpc_pci_table,
        .probe          = labpc_pci_probe,
        .remove         = comedi_pci_auto_unconfig,
};
module_comedi_pci_driver(labpc_pci_comedi_driver, labpc_pci_driver);

MODULE_DESCRIPTION("Comedi: National Instruments Lab-PC PCI-1200 driver");
MODULE_AUTHOR("Comedi https://www.comedi.org");
MODULE_LICENSE("GPL");