bvme6000_scsi.c

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/*
 * Detection routine for the NCR53c710 based BVME6000 SCSI Controllers for Linux.
 *
 * Based on work by Alan Hourihane and Kars de Jong
 *
 * Rewritten to use 53c700.c by Richard Hirst <[email protected]>
 */

#include <linux/module.h>
#include <linux/blkdev.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <asm/bvme6000hw.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("Richard Hirst <[email protected]>");
MODULE_DESCRIPTION("BVME6000 NCR53C710 driver");
MODULE_LICENSE("GPL");

static struct scsi_host_template bvme6000_scsi_driver_template = {
    .name           = "BVME6000 NCR53c710 SCSI",
    .proc_name      = "BVME6000",
    .this_id        = 7,
    .module         = THIS_MODULE,
};

static struct platform_device *bvme6000_scsi_device;

static __devinit int
bvme6000_probe(struct platform_device *dev)
{
    struct Scsi_Host *host;
    struct NCR_700_Host_Parameters *hostdata;

    if (!MACH_IS_BVME6000)
        goto out;

    hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
    if (!hostdata) {
        printk(KERN_ERR "bvme6000-scsi: "
                "Failed to allocate host data\n");
        goto out;
    }

    /* Fill in the required pieces of hostdata */
    hostdata->base = (void __iomem *)BVME_NCR53C710_BASE;
    hostdata->clock = 40;   /* XXX - depends on the CPU clock! */
    hostdata->chip710 = 1;
    hostdata->dmode_extra = DMODE_FC2;
    hostdata->dcntl_extra = EA_710;
    hostdata->ctest7_extra = CTEST7_TT1;

    /* and register the chip */
    host = NCR_700_detect(&bvme6000_scsi_driver_template, hostdata,
                  &dev->dev);
    if (!host) {
        printk(KERN_ERR "bvme6000-scsi: No host detected; "
                "board configuration problem?\n");
        goto out_free;
    }
    host->base = BVME_NCR53C710_BASE;
    host->this_id = 7;
    host->irq = BVME_IRQ_SCSI;
    if (request_irq(BVME_IRQ_SCSI, NCR_700_intr, 0, "bvme6000-scsi",
            host)) {
        printk(KERN_ERR "bvme6000-scsi: request_irq failed\n");
        goto out_put_host;
    }

    platform_set_drvdata(dev, host);
    scsi_scan_host(host);

    return 0;

 out_put_host:
    scsi_host_put(host);
 out_free:
    kfree(hostdata);
 out:
    return -ENODEV;
}

static __devexit int
bvme6000_device_remove(struct platform_device *dev)
{
    struct Scsi_Host *host = platform_get_drvdata(dev);
    struct NCR_700_Host_Parameters *hostdata = shost_priv(host);

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

    return 0;
}

static struct platform_driver bvme6000_scsi_driver = {
    .driver = {
        .name       = "bvme6000-scsi",
        .owner      = THIS_MODULE,
    },
    .probe      = bvme6000_probe,
    .remove     = __devexit_p(bvme6000_device_remove),
};

static int __init bvme6000_scsi_init(void)
{
    int err;

    err = platform_driver_register(&bvme6000_scsi_driver);
    if (err)
        return err;

    bvme6000_scsi_device = platform_device_register_simple("bvme6000-scsi",
                                   -1, NULL, 0);
    if (IS_ERR(bvme6000_scsi_device)) {
        platform_driver_unregister(&bvme6000_scsi_driver);
        return PTR_ERR(bvme6000_scsi_device);
    }

    return 0;
}

static void __exit bvme6000_scsi_exit(void)
{
    platform_device_unregister(bvme6000_scsi_device);
    platform_driver_unregister(&bvme6000_scsi_driver);
}

module_init(bvme6000_scsi_init);
module_exit(bvme6000_scsi_exit);