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
amiga_a4000t_scsi_probe(struct platform_device * pdev)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_obj(struct NCR_700_Host_Parameters);
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
amiga_a4000t_scsi_remove(struct platform_device * pdev)97 static void __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 }
109
110 /*
111 * amiga_a4000t_scsi_remove() lives in .exit.text. For drivers registered via
112 * module_platform_driver_probe() this is ok because they cannot get unbound at
113 * runtime. So mark the driver struct with __refdata to prevent modpost
114 * triggering a section mismatch warning.
115 */
116 static struct platform_driver amiga_a4000t_scsi_driver __refdata = {
117 .remove = __exit_p(amiga_a4000t_scsi_remove),
118 .driver = {
119 .name = "amiga-a4000t-scsi",
120 },
121 };
122
123 module_platform_driver_probe(amiga_a4000t_scsi_driver, amiga_a4000t_scsi_probe);
124
125 MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / "
126 "Kars de Jong <jongk@linux-m68k.org>");
127 MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");
128 MODULE_LICENSE("GPL");
129 MODULE_ALIAS("platform:amiga-a4000t-scsi");
130