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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(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 
amiga_a4000t_scsi_remove(struct platform_device * pdev)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");
126