drivers/scsi/a4000t.c

Source file repositories/reference/linux-study-clean/drivers/scsi/a4000t.c

File Facts

System
Linux kernel
Corpus path
drivers/scsi/a4000t.c
Extension
.c
Size
3498 bytes
Lines
130
Domain
Driver Families
Bucket
drivers/scsi
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// 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_obj(struct NCR_700_Host_Parameters);
	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:

Annotation

Implementation Notes