GNU Linux-libre 5.19-rc6-gnu
[releases.git] / drivers / scsi / a4000t.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux.
4  *              Amiga Technologies A4000T SCSI controller.
5  *
6  * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk>
7  * plus modifications of the 53c7xx.c driver to support the Amiga.
8  *
9  * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
10  */
11
12 #include <linux/module.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/amigahw.h>
18 #include <asm/amigaints.h>
19 #include <scsi/scsi_host.h>
20 #include <scsi/scsi_transport_spi.h>
21
22 #include "53c700.h"
23
24
25 static struct scsi_host_template a4000t_scsi_driver_template = {
26         .name           = "A4000T builtin SCSI",
27         .proc_name      = "A4000t",
28         .this_id        = 7,
29         .module         = THIS_MODULE,
30 };
31
32
33 #define A4000T_SCSI_OFFSET      0x40
34
35 static int __init amiga_a4000t_scsi_probe(struct platform_device *pdev)
36 {
37         struct resource *res;
38         phys_addr_t scsi_addr;
39         struct NCR_700_Host_Parameters *hostdata;
40         struct Scsi_Host *host;
41
42         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
43         if (!res)
44                 return -ENODEV;
45
46         if (!request_mem_region(res->start, resource_size(res),
47                                 "A4000T builtin SCSI"))
48                 return -EBUSY;
49
50         hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters),
51                            GFP_KERNEL);
52         if (!hostdata) {
53                 dev_err(&pdev->dev, "Failed to allocate host data\n");
54                 goto out_release;
55         }
56
57         scsi_addr = res->start + A4000T_SCSI_OFFSET;
58
59         /* Fill in the required pieces of hostdata */
60         hostdata->base = ZTWO_VADDR(scsi_addr);
61         hostdata->clock = 50;
62         hostdata->chip710 = 1;
63         hostdata->dmode_extra = DMODE_FC2;
64         hostdata->dcntl_extra = EA_710;
65
66         /* and register the chip */
67         host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata,
68                               &pdev->dev);
69         if (!host) {
70                 dev_err(&pdev->dev,
71                         "No host detected; board configuration problem?\n");
72                 goto out_free;
73         }
74
75         host->this_id = 7;
76         host->base = scsi_addr;
77         host->irq = IRQ_AMIGA_PORTS;
78
79         if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi",
80                         host)) {
81                 dev_err(&pdev->dev, "request_irq failed\n");
82                 goto out_put_host;
83         }
84
85         platform_set_drvdata(pdev, host);
86         scsi_scan_host(host);
87         return 0;
88
89  out_put_host:
90         scsi_host_put(host);
91  out_free:
92         kfree(hostdata);
93  out_release:
94         release_mem_region(res->start, resource_size(res));
95         return -ENODEV;
96 }
97
98 static int __exit amiga_a4000t_scsi_remove(struct platform_device *pdev)
99 {
100         struct Scsi_Host *host = platform_get_drvdata(pdev);
101         struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
102         struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
103
104         scsi_remove_host(host);
105         NCR_700_release(host);
106         kfree(hostdata);
107         free_irq(host->irq, host);
108         release_mem_region(res->start, resource_size(res));
109         return 0;
110 }
111
112 static struct platform_driver amiga_a4000t_scsi_driver = {
113         .remove = __exit_p(amiga_a4000t_scsi_remove),
114         .driver   = {
115                 .name   = "amiga-a4000t-scsi",
116         },
117 };
118
119 module_platform_driver_probe(amiga_a4000t_scsi_driver, amiga_a4000t_scsi_probe);
120
121 MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / "
122               "Kars de Jong <jongk@linux-m68k.org>");
123 MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");
124 MODULE_LICENSE("GPL");
125 MODULE_ALIAS("platform:amiga-a4000t-scsi");