[SCSI] 53c700: Amiga 4000T NCR53c710 SCSI
[linux-2.6.git] / drivers / scsi / a4000t.c
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/amigaints.h>
16 #include <scsi/scsi_host.h>
17 #include <scsi/scsi_transport_spi.h>
18
19 #include "53c700.h"
20
21 MODULE_AUTHOR("Alan Hourihane <alanh@fairlite.demon.co.uk> / Kars de Jong <jongk@linux-m68k.org>");
22 MODULE_DESCRIPTION("Amiga A4000T NCR53C710 driver");
23 MODULE_LICENSE("GPL");
24
25
26 static struct scsi_host_template a4000t_scsi_driver_template = {
27         .name           = "A4000T builtin SCSI",
28         .proc_name      = "A4000t",
29         .this_id        = 7,
30         .module         = THIS_MODULE,
31 };
32
33 static struct platform_device *a4000t_scsi_device;
34
35 #define A4000T_SCSI_ADDR 0xdd0040
36
37 static int __devinit a4000t_probe(struct device *dev)
38 {
39         struct Scsi_Host * host = NULL;
40         struct NCR_700_Host_Parameters *hostdata;
41
42         if (!(MACH_IS_AMIGA && AMIGAHW_PRESENT(A4000_SCSI)))
43                 goto out;
44
45         if (!request_mem_region(A4000T_SCSI_ADDR, 0x1000,
46                                 "A4000T builtin SCSI"))
47                 goto out;
48
49         hostdata = kmalloc(sizeof(struct NCR_700_Host_Parameters), GFP_KERNEL);
50         if (hostdata == NULL) {
51                 printk(KERN_ERR "a4000t-scsi: Failed to allocate host data\n");
52                 goto out_release;
53         }
54         memset(hostdata, 0, sizeof(struct NCR_700_Host_Parameters));
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, dev);
65         if (!host) {
66                 printk(KERN_ERR "a4000t-scsi: No host detected; "
67                                 "board configuration problem?\n");
68                 goto out_free;
69         }
70
71         host->this_id = 7;
72         host->base = A4000T_SCSI_ADDR;
73         host->irq = IRQ_AMIGA_PORTS;
74
75         if (request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "a4000t-scsi",
76                         host)) {
77                 printk(KERN_ERR "a4000t-scsi: request_irq failed\n");
78                 goto out_put_host;
79         }
80
81         scsi_scan_host(host);
82
83         return 0;
84
85  out_put_host:
86         scsi_host_put(host);
87  out_free:
88         kfree(hostdata);
89  out_release:
90         release_mem_region(A4000T_SCSI_ADDR, 0x1000);
91  out:
92         return -ENODEV;
93 }
94
95 static __devexit int a4000t_device_remove(struct device *dev)
96 {
97         struct Scsi_Host *host = dev_to_shost(dev);
98         struct NCR_700_Host_Parameters *hostdata = shost_priv(host);
99
100         scsi_remove_host(host);
101
102         NCR_700_release(host);
103         kfree(hostdata);
104         free_irq(host->irq, host);
105         release_mem_region(A4000T_SCSI_ADDR, 0x1000);
106
107         return 0;
108 }
109
110 static struct device_driver a4000t_scsi_driver = {
111         .name   = "a4000t-scsi",
112         .bus    = &platform_bus_type,
113         .probe  = a4000t_probe,
114         .remove = __devexit_p(a4000t_device_remove),
115 };
116
117 static int __init a4000t_scsi_init(void)
118 {
119         int err;
120
121         err = driver_register(&a4000t_scsi_driver);
122         if (err)
123                 return err;
124
125         a4000t_scsi_device = platform_device_register_simple("a4000t-scsi",
126                         -1, NULL, 0);
127         if (IS_ERR(a4000t_scsi_device)) {
128                 driver_unregister(&a4000t_scsi_driver);
129                 return PTR_ERR(a4000t_scsi_device);
130         }
131
132         return err;
133 }
134
135 static void __exit a4000t_scsi_exit(void)
136 {
137         platform_device_unregister(a4000t_scsi_device);
138         driver_unregister(&a4000t_scsi_driver);
139 }
140
141 module_init(a4000t_scsi_init);
142 module_exit(a4000t_scsi_exit);