1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Detection routine for the NCR53c710 based BVME6000 SCSI Controllers for Linux.
4 *
5 * Based on work by Alan Hourihane and Kars de Jong
6 *
7 * Rewritten to use 53c700.c by Richard Hirst <richard@sleepie.demon.co.uk>
8 */
9
10#include <linux/module.h>
11#include <linux/blkdev.h>
12#include <linux/device.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/bvme6000hw.h>
18#include <scsi/scsi_host.h>
19#include <scsi/scsi_device.h>
20#include <scsi/scsi_transport.h>
21#include <scsi/scsi_transport_spi.h>
22
23#include "53c700.h"
24
25MODULE_AUTHOR("Richard Hirst <richard@sleepie.demon.co.uk>");
26MODULE_DESCRIPTION("BVME6000 NCR53C710 driver");
27MODULE_LICENSE("GPL");
28
29static struct scsi_host_template bvme6000_scsi_driver_template = {
30	.name			= "BVME6000 NCR53c710 SCSI",
31	.proc_name		= "BVME6000",
32	.this_id		= 7,
33	.module			= THIS_MODULE,
34};
35
36static struct platform_device *bvme6000_scsi_device;
37
38static int
39bvme6000_probe(struct platform_device *dev)
40{
41	struct Scsi_Host *host;
42	struct NCR_700_Host_Parameters *hostdata;
43
44	if (!MACH_IS_BVME6000)
45		goto out;
46
47	hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
48	if (!hostdata) {
49		printk(KERN_ERR "bvme6000-scsi: "
50				"Failed to allocate host data\n");
51		goto out;
52	}
53
54	/* Fill in the required pieces of hostdata */
55	hostdata->base = (void __iomem *)BVME_NCR53C710_BASE;
56	hostdata->clock = 40;	/* XXX - depends on the CPU clock! */
57	hostdata->chip710 = 1;
58	hostdata->dmode_extra = DMODE_FC2;
59	hostdata->dcntl_extra = EA_710;
60	hostdata->ctest7_extra = CTEST7_TT1;
61
62	/* and register the chip */
63	host = NCR_700_detect(&bvme6000_scsi_driver_template, hostdata,
64			      &dev->dev);
65	if (!host) {
66		printk(KERN_ERR "bvme6000-scsi: No host detected; "
67				"board configuration problem?\n");
68		goto out_free;
69	}
70	host->base = BVME_NCR53C710_BASE;
71	host->this_id = 7;
72	host->irq = BVME_IRQ_SCSI;
73	if (request_irq(BVME_IRQ_SCSI, NCR_700_intr, 0, "bvme6000-scsi",
74			host)) {
75		printk(KERN_ERR "bvme6000-scsi: request_irq failed\n");
76		goto out_put_host;
77	}
78
79	platform_set_drvdata(dev, host);
80	scsi_scan_host(host);
81
82	return 0;
83
84 out_put_host:
85	scsi_host_put(host);
86 out_free:
87	kfree(hostdata);
88 out:
89	return -ENODEV;
90}
91
92static void
93bvme6000_device_remove(struct platform_device *dev)
94{
95	struct Scsi_Host *host = platform_get_drvdata(dev);
96	struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
97
98	scsi_remove_host(host);
99	NCR_700_release(host);
100	kfree(hostdata);
101	free_irq(host->irq, host);
102}
103
104static struct platform_driver bvme6000_scsi_driver = {
105	.driver = {
106		.name		= "bvme6000-scsi",
107	},
108	.probe		= bvme6000_probe,
109	.remove_new	= bvme6000_device_remove,
110};
111
112static int __init bvme6000_scsi_init(void)
113{
114	int err;
115
116	err = platform_driver_register(&bvme6000_scsi_driver);
117	if (err)
118		return err;
119
120	bvme6000_scsi_device = platform_device_register_simple("bvme6000-scsi",
121							       -1, NULL, 0);
122	if (IS_ERR(bvme6000_scsi_device)) {
123		platform_driver_unregister(&bvme6000_scsi_driver);
124		return PTR_ERR(bvme6000_scsi_device);
125	}
126
127	return 0;
128}
129
130static void __exit bvme6000_scsi_exit(void)
131{
132	platform_device_unregister(bvme6000_scsi_device);
133	platform_driver_unregister(&bvme6000_scsi_driver);
134}
135
136module_init(bvme6000_scsi_init);
137module_exit(bvme6000_scsi_exit);
138