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
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