cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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a4000t.c (3243B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux.
      4 *		Amiga Technologies A4000T SCSI controller.
      5 *
      6 * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk>
      7 * plus modifications of the 53c7xx.c driver to support the Amiga.
      8 *
      9 * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
     10 */
     11
     12#include <linux/module.h>
     13#include <linux/platform_device.h>
     14#include <linux/init.h>
     15#include <linux/interrupt.h>
     16#include <linux/slab.h>
     17#include <asm/amigahw.h>
     18#include <asm/amigaints.h>
     19#include <scsi/scsi_host.h>
     20#include <scsi/scsi_transport_spi.h>
     21
     22#include "53c700.h"
     23
     24
     25static struct scsi_host_template a4000t_scsi_driver_template = {
     26	.name		= "A4000T builtin SCSI",
     27	.proc_name	= "A4000t",
     28	.this_id	= 7,
     29	.module		= THIS_MODULE,
     30};
     31
     32
     33#define A4000T_SCSI_OFFSET	0x40
     34
     35static int __init amiga_a4000t_scsi_probe(struct platform_device *pdev)
     36{
     37	struct resource *res;
     38	phys_addr_t scsi_addr;
     39	struct NCR_700_Host_Parameters *hostdata;
     40	struct Scsi_Host *host;
     41
     42	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
     43	if (!res)
     44		return -ENODEV;
     45
     46	if (!request_mem_region(res->start, resource_size(res),
     47				"A4000T builtin SCSI"))
     48		return -EBUSY;
     49
     50	hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters),
     51			   GFP_KERNEL);
     52	if (!hostdata) {
     53		dev_err(&pdev->dev, "Failed to allocate host data\n");
     54		goto out_release;
     55	}
     56
     57	scsi_addr = res->start + A4000T_SCSI_OFFSET;
     58
     59	/* Fill in the required pieces of hostdata */
     60	hostdata->base = ZTWO_VADDR(scsi_addr);
     61	hostdata->clock = 50;
     62	hostdata->chip710 = 1;
     63	hostdata->dmode_extra = DMODE_FC2;
     64	hostdata->dcntl_extra = EA_710;
     65
     66	/* and register the chip */
     67	host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata,
     68			      &pdev->dev);
     69	if (!host) {
     70		dev_err(&pdev->dev,
     71			"No host detected; board configuration problem?\n");
     72		goto out_free;
     73	}
     74
     75	host->this_id = 7;
     76	host->base = scsi_addr;
     77	host->irq = IRQ_AMIGA_PORTS;
     78
     79	if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi",
     80			host)) {
     81		dev_err(&pdev->dev, "request_irq failed\n");
     82		goto out_put_host;
     83	}
     84
     85	platform_set_drvdata(pdev, host);
     86	scsi_scan_host(host);
     87	return 0;
     88
     89 out_put_host:
     90	scsi_host_put(host);
     91 out_free:
     92	kfree(hostdata);
     93 out_release:
     94	release_mem_region(res->start, resource_size(res));
     95	return -ENODEV;
     96}
     97
     98static int __exit amiga_a4000t_scsi_remove(struct platform_device *pdev)
     99{
    100	struct Scsi_Host *host = platform_get_drvdata(pdev);
    101	struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
    102	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
    103
    104	scsi_remove_host(host);
    105	NCR_700_release(host);
    106	kfree(hostdata);
    107	free_irq(host->irq, host);
    108	release_mem_region(res->start, resource_size(res));
    109	return 0;
    110}
    111
    112static struct platform_driver amiga_a4000t_scsi_driver = {
    113	.remove = __exit_p(amiga_a4000t_scsi_remove),
    114	.driver   = {
    115		.name	= "amiga-a4000t-scsi",
    116	},
    117};
    118
    119module_platform_driver_probe(amiga_a4000t_scsi_driver, amiga_a4000t_scsi_probe);
    120
    121MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / "
    122	      "Kars de Jong <jongk@linux-m68k.org>");
    123MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");
    124MODULE_LICENSE("GPL");
    125MODULE_ALIAS("platform:amiga-a4000t-scsi");