sni_53c710.c

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/* -*- mode: c; c-basic-offset: 8 -*- */

/* SNI RM driver
 *
 * Copyright (C) 2001 by [email protected]
**-----------------------------------------------------------------------------
**
**  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.
**
**-----------------------------------------------------------------------------
 */

/*
 * Based on lasi700.c
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/mm.h>
#include <linux/blkdev.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>

#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/irq.h>
#include <asm/delay.h>

#include <scsi/scsi_host.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_spi.h>

#include "53c700.h"

MODULE_AUTHOR("Thomas Bogendörfer");
MODULE_DESCRIPTION("SNI RM 53c710 SCSI Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:snirm_53c710");

#define SNIRM710_CLOCK  32

static struct scsi_host_template snirm710_template = {
    .name       = "SNI RM SCSI 53c710",
    .proc_name  = "snirm_53c710",
    .this_id    = 7,
    .module     = THIS_MODULE,
};

static int __devinit snirm710_probe(struct platform_device *dev)
{
    unsigned long base;
    struct NCR_700_Host_Parameters *hostdata;
    struct Scsi_Host *host;
    struct  resource *res;

    res = platform_get_resource(dev, IORESOURCE_MEM, 0);
    if (!res)
        return -ENODEV;

    base = res->start;
    hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
    if (!hostdata) {
        dev_printk(KERN_ERR, dev, "Failed to allocate host data\n");
        return -ENOMEM;
    }

    hostdata->dev = &dev->dev;
    dma_set_mask(&dev->dev, DMA_BIT_MASK(32));
    hostdata->base = ioremap_nocache(base, 0x100);
    hostdata->differential = 0;

    hostdata->clock = SNIRM710_CLOCK;
    hostdata->force_le_on_be = 1;
    hostdata->chip710 = 1;
    hostdata->burst_length = 4;

    host = NCR_700_detect(&snirm710_template, hostdata, &dev->dev);
    if (!host)
        goto out_kfree;
    host->this_id = 7;
    host->base = base;
    host->irq = platform_get_irq(dev, 0);
    if(request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "snirm710", host)) {
        printk(KERN_ERR "snirm710: request_irq failed!\n");
        goto out_put_host;
    }

    dev_set_drvdata(&dev->dev, host);
    scsi_scan_host(host);

    return 0;

 out_put_host:
    scsi_host_put(host);
 out_kfree:
    iounmap(hostdata->base);
    kfree(hostdata);
    return -ENODEV;
}

static int __exit snirm710_driver_remove(struct platform_device *dev)
{
    struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
    struct NCR_700_Host_Parameters *hostdata =
        (struct NCR_700_Host_Parameters *)host->hostdata[0];

    scsi_remove_host(host);
    NCR_700_release(host);
    free_irq(host->irq, host);
    iounmap(hostdata->base);
    kfree(hostdata);

    return 0;
}

static struct platform_driver snirm710_driver = {
    .probe  = snirm710_probe,
    .remove = __devexit_p(snirm710_driver_remove),
    .driver = {
        .name   = "snirm_53c710",
        .owner  = THIS_MODULE,
    },
};

static int __init snirm710_init(void)
{
    return platform_driver_register(&snirm710_driver);
}

static void __exit snirm710_exit(void)
{
    platform_driver_unregister(&snirm710_driver);
}

module_init(snirm710_init);
module_exit(snirm710_exit);