xref: /openbmc/linux/drivers/scsi/a4000t.c (revision 31b90347)
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 
24 static 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 
34 static 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 = (void __iomem *)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 
97 static 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 
111 static struct platform_driver amiga_a4000t_scsi_driver = {
112 	.remove = __exit_p(amiga_a4000t_scsi_remove),
113 	.driver   = {
114 		.name	= "amiga-a4000t-scsi",
115 		.owner	= THIS_MODULE,
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