GNU Linux-libre 5.19-rc6-gnu
[releases.git] / drivers / scsi / bvme6000_scsi.c
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
25 MODULE_AUTHOR("Richard Hirst <richard@sleepie.demon.co.uk>");
26 MODULE_DESCRIPTION("BVME6000 NCR53C710 driver");
27 MODULE_LICENSE("GPL");
28
29 static 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
36 static struct platform_device *bvme6000_scsi_device;
37
38 static int
39 bvme6000_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
92 static int
93 bvme6000_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         return 0;
104 }
105
106 static struct platform_driver bvme6000_scsi_driver = {
107         .driver = {
108                 .name           = "bvme6000-scsi",
109         },
110         .probe          = bvme6000_probe,
111         .remove         = bvme6000_device_remove,
112 };
113
114 static int __init bvme6000_scsi_init(void)
115 {
116         int err;
117
118         err = platform_driver_register(&bvme6000_scsi_driver);
119         if (err)
120                 return err;
121
122         bvme6000_scsi_device = platform_device_register_simple("bvme6000-scsi",
123                                                                -1, NULL, 0);
124         if (IS_ERR(bvme6000_scsi_device)) {
125                 platform_driver_unregister(&bvme6000_scsi_driver);
126                 return PTR_ERR(bvme6000_scsi_device);
127         }
128
129         return 0;
130 }
131
132 static void __exit bvme6000_scsi_exit(void)
133 {
134         platform_device_unregister(bvme6000_scsi_device);
135         platform_driver_unregister(&bvme6000_scsi_driver);
136 }
137
138 module_init(bvme6000_scsi_init);
139 module_exit(bvme6000_scsi_exit);