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 void __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}
110
111static struct platform_driver amiga_a4000t_scsi_driver = {
112	.remove_new = __exit_p(amiga_a4000t_scsi_remove),
113	.driver   = {
114		.name	= "amiga-a4000t-scsi",
115	},
116};
117
118module_platform_driver_probe(amiga_a4000t_scsi_driver, amiga_a4000t_scsi_probe);
119
120MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / "
121	      "Kars de Jong <jongk@linux-m68k.org>");
122MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");
123MODULE_LICENSE("GPL");
124MODULE_ALIAS("platform:amiga-a4000t-scsi");
125