1/*
2 * Detection routine for the NCR53c710 based MVME16x SCSI Controllers for Linux.
3 *
4 * Based on work by Alan Hourihane
5 *
6 * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
7 */
8
9#include <linux/module.h>
10#include <linux/blkdev.h>
11#include <linux/device.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/mvme16xhw.h>
17#include <scsi/scsi_host.h>
18#include <scsi/scsi_device.h>
19#include <scsi/scsi_transport.h>
20#include <scsi/scsi_transport_spi.h>
21
22#include "53c700.h"
23
24MODULE_AUTHOR("Kars de Jong <jongk@linux-m68k.org>");
25MODULE_DESCRIPTION("MVME16x NCR53C710 driver");
26MODULE_LICENSE("GPL");
27
28static struct scsi_host_template mvme16x_scsi_driver_template = {
29	.name			= "MVME16x NCR53c710 SCSI",
30	.proc_name		= "MVME16x",
31	.this_id		= 7,
32	.module			= THIS_MODULE,
33};
34
35static struct platform_device *mvme16x_scsi_device;
36
37static int mvme16x_probe(struct platform_device *dev)
38{
39	struct Scsi_Host * host = NULL;
40	struct NCR_700_Host_Parameters *hostdata;
41
42	if (!MACH_IS_MVME16x)
43		goto out;
44
45	if (mvme16x_config & MVME16x_CONFIG_NO_SCSICHIP) {
46		printk(KERN_INFO "mvme16x-scsi: detection disabled, "
47				 "SCSI chip not present\n");
48		goto out;
49	}
50
51	hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
52	if (hostdata == NULL) {
53		printk(KERN_ERR "mvme16x-scsi: "
54				"Failed to allocate host data\n");
55		goto out;
56	}
57
58	/* Fill in the required pieces of hostdata */
59	hostdata->base = (void __iomem *)0xfff47000UL;
60	hostdata->clock = 50;	/* XXX - depends on the CPU clock! */
61	hostdata->chip710 = 1;
62	hostdata->dmode_extra = DMODE_FC2;
63	hostdata->dcntl_extra = EA_710;
64	hostdata->ctest7_extra = CTEST7_TT1;
65
66	/* and register the chip */
67	host = NCR_700_detect(&mvme16x_scsi_driver_template, hostdata,
68			      &dev->dev);
69	if (!host) {
70		printk(KERN_ERR "mvme16x-scsi: No host detected; "
71				"board configuration problem?\n");
72		goto out_free;
73	}
74	host->this_id = 7;
75	host->base = 0xfff47000UL;
76	host->irq = MVME16x_IRQ_SCSI;
77	if (request_irq(host->irq, NCR_700_intr, 0, "mvme16x-scsi", host)) {
78		printk(KERN_ERR "mvme16x-scsi: request_irq failed\n");
79		goto out_put_host;
80	}
81
82	/* Enable scsi chip ints */
83	{
84		volatile unsigned long v;
85
86		/* Enable scsi interrupts at level 4 in PCCchip2 */
87		v = in_be32(0xfff4202c);
88		v = (v & ~0xff) | 0x10 | 4;
89		out_be32(0xfff4202c, v);
90	}
91
92	platform_set_drvdata(dev, host);
93	scsi_scan_host(host);
94
95	return 0;
96
97 out_put_host:
98	scsi_host_put(host);
99 out_free:
100	kfree(hostdata);
101 out:
102	return -ENODEV;
103}
104
105static int mvme16x_device_remove(struct platform_device *dev)
106{
107	struct Scsi_Host *host = platform_get_drvdata(dev);
108	struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
109
110	/* Disable scsi chip ints */
111	{
112		volatile unsigned long v;
113
114		v = in_be32(0xfff4202c);
115		v &= ~0x10;
116		out_be32(0xfff4202c, v);
117	}
118	scsi_remove_host(host);
119	NCR_700_release(host);
120	kfree(hostdata);
121	free_irq(host->irq, host);
122
123	return 0;
124}
125
126static struct platform_driver mvme16x_scsi_driver = {
127	.driver = {
128		.name           = "mvme16x-scsi",
129	},
130	.probe          = mvme16x_probe,
131	.remove         = mvme16x_device_remove,
132};
133
134static int __init mvme16x_scsi_init(void)
135{
136	int err;
137
138	err = platform_driver_register(&mvme16x_scsi_driver);
139	if (err)
140		return err;
141
142	mvme16x_scsi_device = platform_device_register_simple("mvme16x-scsi",
143							      -1, NULL, 0);
144	if (IS_ERR(mvme16x_scsi_device)) {
145		platform_driver_unregister(&mvme16x_scsi_driver);
146		return PTR_ERR(mvme16x_scsi_device);
147	}
148
149	return 0;
150}
151
152static void __exit mvme16x_scsi_exit(void)
153{
154	platform_device_unregister(mvme16x_scsi_device);
155	platform_driver_unregister(&mvme16x_scsi_driver);
156}
157
158module_init(mvme16x_scsi_init);
159module_exit(mvme16x_scsi_exit);
160