a4000t.c

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/*
 * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux.
 *      Amiga Technologies A4000T SCSI controller.
 *
 * Written 1997 by Alan Hourihane <[email protected]>
 * plus modifications of the 53c7xx.c driver to support the Amiga.
 *
 * Rewritten to use 53c700.c by Kars de Jong <[email protected]>
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <asm/amigahw.h>
#include <asm/amigaints.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_transport_spi.h>

#include "53c700.h"


static struct scsi_host_template a4000t_scsi_driver_template = {
    .name       = "A4000T builtin SCSI",
    .proc_name  = "A4000t",
    .this_id    = 7,
    .module     = THIS_MODULE,
};


#define A4000T_SCSI_OFFSET  0x40

static int __init amiga_a4000t_scsi_probe(struct platform_device *pdev)
{
    struct resource *res;
    phys_addr_t scsi_addr;
    struct NCR_700_Host_Parameters *hostdata;
    struct Scsi_Host *host;

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

    if (!request_mem_region(res->start, resource_size(res),
                "A4000T builtin SCSI"))
        return -EBUSY;

    hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters),
               GFP_KERNEL);
    if (!hostdata) {
        dev_err(&pdev->dev, "Failed to allocate host data\n");
        goto out_release;
    }

    scsi_addr = res->start + A4000T_SCSI_OFFSET;

    /* Fill in the required pieces of hostdata */
    hostdata->base = (void __iomem *)ZTWO_VADDR(scsi_addr);
    hostdata->clock = 50;
    hostdata->chip710 = 1;
    hostdata->dmode_extra = DMODE_FC2;
    hostdata->dcntl_extra = EA_710;

    /* and register the chip */
    host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata,
                  &pdev->dev);
    if (!host) {
        dev_err(&pdev->dev,
            "No host detected; board configuration problem?\n");
        goto out_free;
    }

    host->this_id = 7;
    host->base = scsi_addr;
    host->irq = IRQ_AMIGA_PORTS;

    if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi",
            host)) {
        dev_err(&pdev->dev, "request_irq failed\n");
        goto out_put_host;
    }

    platform_set_drvdata(pdev, host);
    scsi_scan_host(host);
    return 0;

 out_put_host:
    scsi_host_put(host);
 out_free:
    kfree(hostdata);
 out_release:
    release_mem_region(res->start, resource_size(res));
    return -ENODEV;
}

static int __exit amiga_a4000t_scsi_remove(struct platform_device *pdev)
{
    struct Scsi_Host *host = platform_get_drvdata(pdev);
    struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
    struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

    scsi_remove_host(host);
    NCR_700_release(host);
    kfree(hostdata);
    free_irq(host->irq, host);
    release_mem_region(res->start, resource_size(res));
    return 0;
}

static struct platform_driver amiga_a4000t_scsi_driver = {
    .remove = __exit_p(amiga_a4000t_scsi_remove),
    .driver   = {
        .name   = "amiga-a4000t-scsi",
        .owner  = THIS_MODULE,
    },
};

static int __init amiga_a4000t_scsi_init(void)
{
    return platform_driver_probe(&amiga_a4000t_scsi_driver,
                     amiga_a4000t_scsi_probe);
}

module_init(amiga_a4000t_scsi_init);

static void __exit amiga_a4000t_scsi_exit(void)
{
    platform_driver_unregister(&amiga_a4000t_scsi_driver);
}

module_exit(amiga_a4000t_scsi_exit);

MODULE_AUTHOR("Alan Hourihane <[email protected]> / "
          "Kars de Jong <[email protected]>");
MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:amiga-a4000t-scsi");