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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 <[email protected]>
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 <[email protected]>");
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_obj(struct NCR_700_Host_Parameters);
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 = 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);