Merge tag 'nvme-5.13-2021-05-05' of git://git.infradead.org/nvme into block-5.13
[linux-2.6-microblaze.git] / drivers / scsi / mvme16x_scsi.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Detection routine for the NCR53c710 based MVME16x SCSI Controllers for Linux.
4  *
5  * Based on work by Alan Hourihane
6  *
7  * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
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/mvme16xhw.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("Kars de Jong <jongk@linux-m68k.org>");
26 MODULE_DESCRIPTION("MVME16x NCR53C710 driver");
27 MODULE_LICENSE("GPL");
28
29 static struct scsi_host_template mvme16x_scsi_driver_template = {
30         .name                   = "MVME16x NCR53c710 SCSI",
31         .proc_name              = "MVME16x",
32         .this_id                = 7,
33         .module                 = THIS_MODULE,
34 };
35
36 static struct platform_device *mvme16x_scsi_device;
37
38 static int mvme16x_probe(struct platform_device *dev)
39 {
40         struct Scsi_Host * host = NULL;
41         struct NCR_700_Host_Parameters *hostdata;
42
43         if (!MACH_IS_MVME16x)
44                 goto out;
45
46         if (mvme16x_config & MVME16x_CONFIG_NO_SCSICHIP) {
47                 printk(KERN_INFO "mvme16x-scsi: detection disabled, "
48                                  "SCSI chip not present\n");
49                 goto out;
50         }
51
52         hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
53         if (hostdata == NULL) {
54                 printk(KERN_ERR "mvme16x-scsi: "
55                                 "Failed to allocate host data\n");
56                 goto out;
57         }
58
59         /* Fill in the required pieces of hostdata */
60         hostdata->base = (void __iomem *)0xfff47000UL;
61         hostdata->clock = 50;   /* XXX - depends on the CPU clock! */
62         hostdata->chip710 = 1;
63         hostdata->dmode_extra = DMODE_FC2;
64         hostdata->dcntl_extra = EA_710;
65         hostdata->ctest7_extra = CTEST7_TT1;
66
67         /* and register the chip */
68         host = NCR_700_detect(&mvme16x_scsi_driver_template, hostdata,
69                               &dev->dev);
70         if (!host) {
71                 printk(KERN_ERR "mvme16x-scsi: No host detected; "
72                                 "board configuration problem?\n");
73                 goto out_free;
74         }
75         host->this_id = 7;
76         host->base = 0xfff47000UL;
77         host->irq = MVME16x_IRQ_SCSI;
78         if (request_irq(host->irq, NCR_700_intr, 0, "mvme16x-scsi", host)) {
79                 printk(KERN_ERR "mvme16x-scsi: request_irq failed\n");
80                 goto out_put_host;
81         }
82
83         /* Enable scsi chip ints */
84         {
85                 volatile unsigned long v;
86
87                 /* Enable scsi interrupts at level 4 in PCCchip2 */
88                 v = in_be32(0xfff4202c);
89                 v = (v & ~0xff) | 0x10 | 4;
90                 out_be32(0xfff4202c, v);
91         }
92
93         platform_set_drvdata(dev, host);
94         scsi_scan_host(host);
95
96         return 0;
97
98  out_put_host:
99         scsi_host_put(host);
100  out_free:
101         kfree(hostdata);
102  out:
103         return -ENODEV;
104 }
105
106 static int mvme16x_device_remove(struct platform_device *dev)
107 {
108         struct Scsi_Host *host = platform_get_drvdata(dev);
109         struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
110
111         /* Disable scsi chip ints */
112         {
113                 volatile unsigned long v;
114
115                 v = in_be32(0xfff4202c);
116                 v &= ~0x10;
117                 out_be32(0xfff4202c, v);
118         }
119         scsi_remove_host(host);
120         NCR_700_release(host);
121         kfree(hostdata);
122         free_irq(host->irq, host);
123
124         return 0;
125 }
126
127 static struct platform_driver mvme16x_scsi_driver = {
128         .driver = {
129                 .name           = "mvme16x-scsi",
130         },
131         .probe          = mvme16x_probe,
132         .remove         = mvme16x_device_remove,
133 };
134
135 static int __init mvme16x_scsi_init(void)
136 {
137         int err;
138
139         err = platform_driver_register(&mvme16x_scsi_driver);
140         if (err)
141                 return err;
142
143         mvme16x_scsi_device = platform_device_register_simple("mvme16x-scsi",
144                                                               -1, NULL, 0);
145         if (IS_ERR(mvme16x_scsi_device)) {
146                 platform_driver_unregister(&mvme16x_scsi_driver);
147                 return PTR_ERR(mvme16x_scsi_device);
148         }
149
150         return 0;
151 }
152
153 static void __exit mvme16x_scsi_exit(void)
154 {
155         platform_device_unregister(mvme16x_scsi_device);
156         platform_driver_unregister(&mvme16x_scsi_driver);
157 }
158
159 module_init(mvme16x_scsi_init);
160 module_exit(mvme16x_scsi_exit);