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192.168.1.100 / T103 / 13eb6a97dabf274443d07c46a6ec8b3392553f08 / . / src / kernel / linux / v4.14 / drivers / scsi / a4000t.c
blob: 66c573093901b168d5a5d52987c3e6869737dea0 [file] [log] [blame]
rjw1f884582022-01-06 17:20:42 +0800[diff] [blame]1/*
2 * Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux.
3 * Amiga Technologies A4000T SCSI controller.
4 *
5 * Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk>
6 * plus modifications of the 53c7xx.c driver to support the Amiga.
7 *
8 * Rewritten to use 53c700.c by Kars de Jong <jongk@linux-m68k.org>
9 */
10
11#include <linux/module.h>
12#include <linux/platform_device.h>
13#include <linux/init.h>
14#include <linux/interrupt.h>
15#include <linux/slab.h>
16#include <asm/amigahw.h>
17#include <asm/amigaints.h>
18#include <scsi/scsi_host.h>
19#include <scsi/scsi_transport_spi.h>
20
21#include "53c700.h"
22
23
24static struct scsi_host_template a4000t_scsi_driver_template = {
25 .name = "A4000T builtin SCSI",
26 .proc_name = "A4000t",
27 .this_id = 7,
28 .module = THIS_MODULE,
29};
30
31
32#define A4000T_SCSI_OFFSET 0x40
33
34static int __init amiga_a4000t_scsi_probe(struct platform_device *pdev)
35{
36 struct resource *res;
37 phys_addr_t scsi_addr;
38 struct NCR_700_Host_Parameters *hostdata;
39 struct Scsi_Host *host;
40
41 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
42 if (!res)
43 return -ENODEV;
44
45 if (!request_mem_region(res->start, resource_size(res),
46 "A4000T builtin SCSI"))
47 return -EBUSY;
48
49 hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters),
50 GFP_KERNEL);
51 if (!hostdata) {
52 dev_err(&pdev->dev, "Failed to allocate host data\n");
53 goto out_release;
54 }
55
56 scsi_addr = res->start + A4000T_SCSI_OFFSET;
57
58 /* Fill in the required pieces of hostdata */
59 hostdata->base = ZTWO_VADDR(scsi_addr);
60 hostdata->clock = 50;
61 hostdata->chip710 = 1;
62 hostdata->dmode_extra = DMODE_FC2;
63 hostdata->dcntl_extra = EA_710;
64
65 /* and register the chip */
66 host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata,
67 &pdev->dev);
68 if (!host) {
69 dev_err(&pdev->dev,
70 "No host detected; board configuration problem?\n");
71 goto out_free;
72 }
73
74 host->this_id = 7;
75 host->base = scsi_addr;
76 host->irq = IRQ_AMIGA_PORTS;
77
78 if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi",
79 host)) {
80 dev_err(&pdev->dev, "request_irq failed\n");
81 goto out_put_host;
82 }
83
84 platform_set_drvdata(pdev, host);
85 scsi_scan_host(host);
86 return 0;
87
88 out_put_host:
89 scsi_host_put(host);
90 out_free:
91 kfree(hostdata);
92 out_release:
93 release_mem_region(res->start, resource_size(res));
94 return -ENODEV;
95}
96
97static int __exit amiga_a4000t_scsi_remove(struct platform_device *pdev)
98{
99 struct Scsi_Host *host = platform_get_drvdata(pdev);
100 struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
101 struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
102
103 scsi_remove_host(host);
104 NCR_700_release(host);
105 kfree(hostdata);
106 free_irq(host->irq, host);
107 release_mem_region(res->start, resource_size(res));
108 return 0;
109}
110
111static struct platform_driver amiga_a4000t_scsi_driver = {
112 .remove = __exit_p(amiga_a4000t_scsi_remove),
113 .driver = {
114 .name = "amiga-a4000t-scsi",
115 },
116};
117
118module_platform_driver_probe(amiga_a4000t_scsi_driver, amiga_a4000t_scsi_probe);
119
120MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / "
121 "Kars de Jong <jongk@linux-m68k.org>");
122MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");
123MODULE_LICENSE("GPL");
124MODULE_ALIAS("platform:amiga-a4000t-scsi");