dmx3191d.c

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/*
    dmx3191d.c - driver for the Domex DMX3191D SCSI card.
    Copyright (C) 2000 by Massimo Piccioni <[email protected]>
    Portions Copyright (C) 2004 by Christoph Hellwig <[email protected]>

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

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#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 AUTOSENSE

#define NCR5380_read(reg)       inb(port + reg)
#define NCR5380_write(reg, value)   outb(value, port + reg)

#define NCR5380_implementation_fields   unsigned int port
#define NCR5380_local_declare()     NCR5380_implementation_fields
#define NCR5380_setup(instance)     port = instance->io_port

/*
 * Includes needed for NCR5380.[ch] (XXX: Move them to NCR5380.h)
 */
#include <linux/delay.h>
#include "scsi.h"

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

#define DMX3191D_DRIVER_NAME    "dmx3191d"
#define DMX3191D_REGION_LEN 8


static struct scsi_host_template dmx3191d_driver_template = {
    .proc_name      = DMX3191D_DRIVER_NAME,
    .name           = "Domex DMX3191D",
    .queuecommand       = NCR5380_queue_command,
    .eh_abort_handler   = NCR5380_abort,
    .eh_bus_reset_handler   = NCR5380_bus_reset,
    .can_queue      = 32,
    .this_id        = 7,
    .sg_tablesize       = SG_ALL,
    .cmd_per_lun        = 2,
    .use_clustering     = DISABLE_CLUSTERING,
};

static int __devinit dmx3191d_probe_one(struct pci_dev *pdev,
        const struct pci_device_id *id)
{
    struct Scsi_Host *shost;
    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;       
    shost->io_port = io;
    shost->irq = pdev->irq;

    NCR5380_init(shost, FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E);

    if (request_irq(pdev->irq, NCR5380_intr, IRQF_SHARED,
                DMX3191D_DRIVER_NAME, shost)) {
        /*
         * Steam powered scsi controllers run without an IRQ anyway
         */
        printk(KERN_WARNING "dmx3191: IRQ %d not available - "
                    "switching to polled mode.\n", pdev->irq);
        shost->irq = SCSI_IRQ_NONE;
    }

    pci_set_drvdata(pdev, shost);

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

    scsi_scan_host(shost);
    return 0;

 out_free_irq:
    free_irq(shost->irq, shost);
 out_release_region:
    release_region(io, DMX3191D_REGION_LEN);
 out_disable_device:
    pci_disable_device(pdev);
 out:
    return error;
}

static void __devexit dmx3191d_remove_one(struct pci_dev *pdev)
{
    struct Scsi_Host *shost = pci_get_drvdata(pdev);

    scsi_remove_host(shost);

    NCR5380_exit(shost);

    if (shost->irq != SCSI_IRQ_NONE)
        free_irq(shost->irq, shost);
    release_region(shost->io_port, DMX3191D_REGION_LEN);
    pci_disable_device(pdev);

    scsi_host_put(shost);
}

static 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     = __devexit_p(dmx3191d_remove_one),
};

static int __init dmx3191d_init(void)
{
    return pci_register_driver(&dmx3191d_pci_driver);
}

static void __exit dmx3191d_exit(void)
{
    pci_unregister_driver(&dmx3191d_pci_driver);
}

module_init(dmx3191d_init);
module_exit(dmx3191d_exit);

MODULE_AUTHOR("Massimo Piccioni <[email protected]>");
MODULE_DESCRIPTION("Domex DMX3191D SCSI driver");
MODULE_LICENSE("GPL");