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