// SPDX-License-Identifier: GPL-2.0-only
/*
 * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux.
 *              Amiga MacroSystemUS WarpEngine SCSI controller.
 *              Amiga Technologies/DKB A4091 SCSI controller.
 *
 * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk>
 * plus modifications of the 53c7xx.c driver to support the Amiga.
 *
 * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/zorro.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"

MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / Kars de Jong <jongk@linux-m68k.org>");
MODULE_DESCRIPTION("Amiga Zorro NCR53C710 driver");
MODULE_LICENSE("GPL");


static struct scsi_host_template zorro7xx_scsi_driver_template = {
        .proc_name      = "zorro7xx",
        .this_id        = 7,
        .module         = THIS_MODULE,
};

static struct zorro_driver_data {
        const char *name;
        unsigned long offset;
        int absolute;   /* offset is absolute address */
} zorro7xx_driver_data[] = {
        { .name = "PowerUP 603e+", .offset = 0xf40000, .absolute = 1 },
        { .name = "WarpEngine 40xx", .offset = 0x40000 },
        { .name = "A4091", .offset = 0x800000 },
        { .name = "GForce 040/060", .offset = 0x40000 },
        { 0 }
};

static struct zorro_device_id zorro7xx_zorro_tbl[] = {
        {
                .id = ZORRO_PROD_PHASE5_BLIZZARD_603E_PLUS,
                .driver_data = (unsigned long)&zorro7xx_driver_data[0],
        },
        {
                .id = ZORRO_PROD_MACROSYSTEMS_WARP_ENGINE_40xx,
                .driver_data = (unsigned long)&zorro7xx_driver_data[1],
        },
        {
                .id = ZORRO_PROD_CBM_A4091_1,
                .driver_data = (unsigned long)&zorro7xx_driver_data[2],
        },
        {
                .id = ZORRO_PROD_CBM_A4091_2,
                .driver_data = (unsigned long)&zorro7xx_driver_data[2],
        },
        {
                .id = ZORRO_PROD_GVP_GFORCE_040_060,
                .driver_data = (unsigned long)&zorro7xx_driver_data[3],
        },
        { 0 }
};
MODULE_DEVICE_TABLE(zorro, zorro7xx_zorro_tbl);

static int zorro7xx_init_one(struct zorro_dev *z,
                             const struct zorro_device_id *ent)
{
        struct Scsi_Host *host;
        struct NCR_700_Host_Parameters *hostdata;
        struct zorro_driver_data *zdd;
        unsigned long board, ioaddr;

        board = zorro_resource_start(z);
        zdd = (struct zorro_driver_data *)ent->driver_data;

        if (zdd->absolute) {
                ioaddr = zdd->offset;
        } else {
                ioaddr = board + zdd->offset;
        }

        if (!zorro_request_device(z, zdd->name)) {
                printk(KERN_ERR "zorro7xx: cannot reserve region 0x%lx, abort\n",
                       board);
                return -EBUSY;
        }

        hostdata = kzalloc_obj(struct NCR_700_Host_Parameters);
        if (!hostdata) {
                printk(KERN_ERR "zorro7xx: Failed to allocate host data\n");
                goto out_release;
        }

        /* Fill in the required pieces of hostdata */
        if (ioaddr > 0x01000000)
                hostdata->base = ioremap(ioaddr, zorro_resource_len(z));
        else
                hostdata->base = ZTWO_VADDR(ioaddr);

        hostdata->clock = 50;
        hostdata->chip710 = 1;

        /* Settings for at least WarpEngine 40xx */
        hostdata->ctest7_extra = CTEST7_TT1;

        zorro7xx_scsi_driver_template.name = zdd->name;

        /* and register the chip */
        host = NCR_700_detect(&zorro7xx_scsi_driver_template, hostdata,
                              &z->dev);
        if (!host) {
                printk(KERN_ERR "zorro7xx: No host detected; "
                                "board configuration problem?\n");
                goto out_free;
        }

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

        if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "zorro7xx-scsi",
                        host)) {
                printk(KERN_ERR "zorro7xx: request_irq failed\n");
                goto out_put_host;
        }

        zorro_set_drvdata(z, host);
        scsi_scan_host(host);

        return 0;

 out_put_host:
        scsi_host_put(host);
 out_free:
        if (ioaddr > 0x01000000)
                iounmap(hostdata->base);
        kfree(hostdata);
 out_release:
        zorro_release_device(z);

        return -ENODEV;
}

static void zorro7xx_remove_one(struct zorro_dev *z)
{
        struct Scsi_Host *host = zorro_get_drvdata(z);
        struct NCR_700_Host_Parameters *hostdata = shost_priv(host);

        scsi_remove_host(host);

        NCR_700_release(host);
        if (host->base > 0x01000000)
                iounmap(hostdata->base);
        kfree(hostdata);
        free_irq(host->irq, host);
        zorro_release_device(z);
}

static struct zorro_driver zorro7xx_driver = {
        .name     = "zorro7xx-scsi",
        .id_table = zorro7xx_zorro_tbl,
        .probe    = zorro7xx_init_one,
        .remove   = zorro7xx_remove_one,
};

static int __init zorro7xx_scsi_init(void)
{
        return zorro_register_driver(&zorro7xx_driver);
}

static void __exit zorro7xx_scsi_exit(void)
{
        zorro_unregister_driver(&zorro7xx_driver);
}

module_init(zorro7xx_scsi_init);
module_exit(zorro7xx_scsi_exit);