xref: /openbmc/linux/drivers/scsi/a4000t.c (revision b6dcefde)
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 <asm/amigahw.h>
16 #include <asm/amigaints.h>
17 #include <scsi/scsi_host.h>
18 #include <scsi/scsi_transport_spi.h>
19 
20 #include "53c700.h"
21 
22 MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / Kars de Jong <jongk@linux-m68k.org>");
23 MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");
24 MODULE_LICENSE("GPL");
25 
26 
27 static struct scsi_host_template a4000t_scsi_driver_template = {
28 	.name		= "A4000T builtin SCSI",
29 	.proc_name	= "A4000t",
30 	.this_id	= 7,
31 	.module		= THIS_MODULE,
32 };
33 
34 static struct platform_device *a4000t_scsi_device;
35 
36 #define A4000T_SCSI_ADDR 0xdd0040
37 
38 static int __devinit a4000t_probe(struct platform_device *dev)
39 {
40 	struct Scsi_Host *host;
41 	struct NCR_700_Host_Parameters *hostdata;
42 
43 	if (!(MACH_IS_AMIGA && AMIGAHW_PRESENT(A4000_SCSI)))
44 		goto out;
45 
46 	if (!request_mem_region(A4000T_SCSI_ADDR, 0x1000,
47 				"A4000T builtin SCSI"))
48 		goto out;
49 
50 	hostdata = kzalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
51 	if (!hostdata) {
52 		printk(KERN_ERR "a4000t-scsi: Failed to allocate host data\n");
53 		goto out_release;
54 	}
55 
56 	/* Fill in the required pieces of hostdata */
57 	hostdata->base = (void __iomem *)ZTWO_VADDR(A4000T_SCSI_ADDR);
58 	hostdata->clock = 50;
59 	hostdata->chip710 = 1;
60 	hostdata->dmode_extra = DMODE_FC2;
61 	hostdata->dcntl_extra = EA_710;
62 
63 	/* and register the chip */
64 	host = NCR_700_detect(&a4000t_scsi_driver_template, hostdata,
65 			      &dev->dev);
66 	if (!host) {
67 		printk(KERN_ERR "a4000t-scsi: No host detected; "
68 				"board configuration problem?\n");
69 		goto out_free;
70 	}
71 
72 	host->this_id = 7;
73 	host->base = A4000T_SCSI_ADDR;
74 	host->irq = IRQ_AMIGA_PORTS;
75 
76 	if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi",
77 			host)) {
78 		printk(KERN_ERR "a4000t-scsi: request_irq failed\n");
79 		goto out_put_host;
80 	}
81 
82 	platform_set_drvdata(dev, host);
83 	scsi_scan_host(host);
84 
85 	return 0;
86 
87  out_put_host:
88 	scsi_host_put(host);
89  out_free:
90 	kfree(hostdata);
91  out_release:
92 	release_mem_region(A4000T_SCSI_ADDR, 0x1000);
93  out:
94 	return -ENODEV;
95 }
96 
97 static __devexit int a4000t_device_remove(struct platform_device *dev)
98 {
99 	struct Scsi_Host *host = platform_get_drvdata(dev);
100 	struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
101 
102 	scsi_remove_host(host);
103 
104 	NCR_700_release(host);
105 	kfree(hostdata);
106 	free_irq(host->irq, host);
107 	release_mem_region(A4000T_SCSI_ADDR, 0x1000);
108 
109 	return 0;
110 }
111 
112 static struct platform_driver a4000t_scsi_driver = {
113 	.driver = {
114 		.name           = "a4000t-scsi",
115 		.owner          = THIS_MODULE,
116 	},
117 	.probe          = a4000t_probe,
118 	.remove         = __devexit_p(a4000t_device_remove),
119 };
120 
121 static int __init a4000t_scsi_init(void)
122 {
123 	int err;
124 
125 	err = platform_driver_register(&a4000t_scsi_driver);
126 	if (err)
127 		return err;
128 
129 	a4000t_scsi_device = platform_device_register_simple("a4000t-scsi",
130 			-1, NULL, 0);
131 	if (IS_ERR(a4000t_scsi_device)) {
132 		platform_driver_unregister(&a4000t_scsi_driver);
133 		return PTR_ERR(a4000t_scsi_device);
134 	}
135 
136 	return err;
137 }
138 
139 static void __exit a4000t_scsi_exit(void)
140 {
141 	platform_device_unregister(a4000t_scsi_device);
142 	platform_driver_unregister(&a4000t_scsi_driver);
143 }
144 
145 module_init(a4000t_scsi_init);
146 module_exit(a4000t_scsi_exit);
147