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// SPDX-License-Identifier: GPL-2.0-only
/*
* Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux.
* Amiga Technologies A4000T 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/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 = 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 void __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));
}
/*
* amiga_a4000t_scsi_remove() lives in .exit.text. For drivers registered via
* module_platform_driver_probe() this is ok because they cannot get unbound at
* runtime. So mark the driver struct with __refdata to prevent modpost
* triggering a section mismatch warning.
*/
static struct platform_driver amiga_a4000t_scsi_driver __refdata = {
.remove_new = __exit_p(amiga_a4000t_scsi_remove),
.driver = {
.name = "amiga-a4000t-scsi",
},
};
module_platform_driver_probe(amiga_a4000t_scsi_driver, amiga_a4000t_scsi_probe);
MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / "
"Kars de Jong <jongk@linux-m68k.org>");
MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:amiga-a4000t-scsi");
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