// SPDX-License-Identifier: GPL-2.0-or-later
/*
    dmx3191d.c - driver for the Domex DMX3191D SCSI card.
    Copyright (C) 2000 by Massimo Piccioni <dafastidio@libero.it>
    Portions Copyright (C) 2004 by Christoph Hellwig <hch@lst.de>

    Based on the generic NCR5380 driver by Drew Eckhardt et al.

*/

#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <asm/io.h>

#include <scsi/scsi_host.h>

/*
 * Definitions for the generic 5380 driver.
 */

#define NCR5380_read(reg)               inb(hostdata->base + (reg))
#define NCR5380_write(reg, value)       outb(value, hostdata->base + (reg))

#define NCR5380_dma_xfer_len            NCR5380_dma_xfer_none
#define NCR5380_dma_recv_setup          NCR5380_dma_setup_none
#define NCR5380_dma_send_setup          NCR5380_dma_setup_none
#define NCR5380_dma_residual            NCR5380_dma_residual_none

#define NCR5380_implementation_fields   /* none */

#include "NCR5380.h"
#include "NCR5380.c"

#define DMX3191D_DRIVER_NAME    "dmx3191d"
#define DMX3191D_REGION_LEN     8


static const struct scsi_host_template dmx3191d_driver_template = {
        .module                 = THIS_MODULE,
        .proc_name              = DMX3191D_DRIVER_NAME,
        .name                   = "Domex DMX3191D",
        .info                   = NCR5380_info,
        .queuecommand           = NCR5380_queue_command,
        .eh_abort_handler       = NCR5380_abort,
        .eh_host_reset_handler  = NCR5380_host_reset,
        .can_queue              = 32,
        .this_id                = 7,
        .sg_tablesize           = SG_ALL,
        .cmd_per_lun            = 2,
        .dma_boundary           = PAGE_SIZE - 1,
        .cmd_size               = sizeof(struct NCR5380_cmd),
};

static int dmx3191d_probe_one(struct pci_dev *pdev,
                              const struct pci_device_id *id)
{
        struct Scsi_Host *shost;
        struct NCR5380_hostdata *hostdata;
        unsigned long io;
        int error = -ENODEV;

        if (pci_enable_device(pdev))
                goto out;

        io = pci_resource_start(pdev, 0);
        if (!request_region(io, DMX3191D_REGION_LEN, DMX3191D_DRIVER_NAME)) {
                printk(KERN_ERR "dmx3191: region 0x%lx-0x%lx already reserved\n",
                                io, io + DMX3191D_REGION_LEN);
                goto out_disable_device;
        }

        shost = scsi_host_alloc(&dmx3191d_driver_template,
                        sizeof(struct NCR5380_hostdata));
        if (!shost)
                goto out_release_region;       

        hostdata = shost_priv(shost);
        hostdata->base = io;

        /* This card does not seem to raise an interrupt on pdev->irq.
         * Steam-powered SCSI controllers run without an IRQ anyway.
         */
        shost->irq = NO_IRQ;

        error = NCR5380_init(shost, 0);
        if (error)
                goto out_host_put;

        NCR5380_maybe_reset_bus(shost);

        pci_set_drvdata(pdev, shost);

        error = scsi_add_host(shost, &pdev->dev);
        if (error)
                goto out_exit;

        scsi_scan_host(shost);
        return 0;

out_exit:
        NCR5380_exit(shost);
out_host_put:
        scsi_host_put(shost);
 out_release_region:
        release_region(io, DMX3191D_REGION_LEN);
 out_disable_device:
        pci_disable_device(pdev);
 out:
        return error;
}

static void dmx3191d_remove_one(struct pci_dev *pdev)
{
        struct Scsi_Host *shost = pci_get_drvdata(pdev);
        struct NCR5380_hostdata *hostdata = shost_priv(shost);
        unsigned long io = hostdata->base;

        scsi_remove_host(shost);

        NCR5380_exit(shost);
        scsi_host_put(shost);
        release_region(io, DMX3191D_REGION_LEN);
        pci_disable_device(pdev);
}

static const struct pci_device_id dmx3191d_pci_tbl[] = {
        {PCI_VENDOR_ID_DOMEX, PCI_DEVICE_ID_DOMEX_DMX3191D,
                PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
        { }
};
MODULE_DEVICE_TABLE(pci, dmx3191d_pci_tbl);

static struct pci_driver dmx3191d_pci_driver = {
        .name           = DMX3191D_DRIVER_NAME,
        .id_table       = dmx3191d_pci_tbl,
        .probe          = dmx3191d_probe_one,
        .remove         = dmx3191d_remove_one,
};

module_pci_driver(dmx3191d_pci_driver);

MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
MODULE_DESCRIPTION("Domex DMX3191D SCSI driver");
MODULE_LICENSE("GPL");