[SCSI] SNI RM 53c710 driver
[linux-2.6.git] / drivers / scsi / sni_53c710.c
1 /* -*- mode: c; c-basic-offset: 8 -*- */
2
3 /* SNI RM driver
4  *
5  * Copyright (C) 2001 by James.Bottomley@HansenPartnership.com
6 **-----------------------------------------------------------------------------
7 **
8 **  This program is free software; you can redistribute it and/or modify
9 **  it under the terms of the GNU General Public License as published by
10 **  the Free Software Foundation; either version 2 of the License, or
11 **  (at your option) any later version.
12 **
13 **  This program is distributed in the hope that it will be useful,
14 **  but WITHOUT ANY WARRANTY; without even the implied warranty of
15 **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 **  GNU General Public License for more details.
17 **
18 **  You should have received a copy of the GNU General Public License
19 **  along with this program; if not, write to the Free Software
20 **  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 **
22 **-----------------------------------------------------------------------------
23  */
24
25 /*
26  * Based on lasi700.c
27  */
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/types.h>
33 #include <linux/stat.h>
34 #include <linux/mm.h>
35 #include <linux/blkdev.h>
36 #include <linux/sched.h>
37 #include <linux/ioport.h>
38 #include <linux/dma-mapping.h>
39 #include <linux/platform_device.h>
40
41 #include <asm/page.h>
42 #include <asm/pgtable.h>
43 #include <asm/irq.h>
44 #include <asm/delay.h>
45
46 #include <scsi/scsi_host.h>
47 #include <scsi/scsi_device.h>
48 #include <scsi/scsi_transport.h>
49 #include <scsi/scsi_transport_spi.h>
50
51 #include "53c700.h"
52
53 MODULE_AUTHOR("Thomas Bogendörfer");
54 MODULE_DESCRIPTION("SNI RM 53c710 SCSI Driver");
55 MODULE_LICENSE("GPL");
56
57 #define SNIRM710_CLOCK  32
58
59 static struct scsi_host_template snirm710_template = {
60         .name           = "SNI RM SCSI 53c710",
61         .proc_name      = "snirm_53c710",
62         .this_id        = 7,
63         .module         = THIS_MODULE,
64 };
65
66 static int __init snirm710_probe(struct platform_device *dev)
67 {
68         unsigned long base;
69         struct NCR_700_Host_Parameters *hostdata;
70         struct Scsi_Host *host;
71         struct  resource *res;
72
73         res = platform_get_resource(dev, IORESOURCE_MEM, 0);
74         if (!res)
75                 return -ENODEV;
76
77         base = res->start;
78         hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
79         if (!hostdata) {
80                 printk(KERN_ERR "%s: Failed to allocate host data\n",
81                        dev->dev.bus_id);
82                 return -ENOMEM;
83         }
84
85         hostdata->dev = &dev->dev;
86         dma_set_mask(&dev->dev, DMA_32BIT_MASK);
87         hostdata->base = ioremap_nocache(CPHYSADDR(base), 0x100);
88         hostdata->differential = 0;
89
90         hostdata->clock = SNIRM710_CLOCK;
91         hostdata->force_le_on_be = 1;
92         hostdata->chip710 = 1;
93         hostdata->burst_length = 4;
94
95         host = NCR_700_detect(&snirm710_template, hostdata, &dev->dev);
96         if (!host)
97                 goto out_kfree;
98         host->this_id = 7;
99         host->base = base;
100         host->irq = platform_get_irq(dev, 0);
101         if(request_irq(host->irq, NCR_700_intr, SA_SHIRQ, "snirm710", host)) {
102                 printk(KERN_ERR "snirm710: request_irq failed!\n");
103                 goto out_put_host;
104         }
105
106         dev_set_drvdata(&dev->dev, host);
107         scsi_scan_host(host);
108
109         return 0;
110
111  out_put_host:
112         scsi_host_put(host);
113  out_kfree:
114         iounmap(hostdata->base);
115         kfree(hostdata);
116         return -ENODEV;
117 }
118
119 static int __exit snirm710_driver_remove(struct platform_device *dev)
120 {
121         struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
122         struct NCR_700_Host_Parameters *hostdata =
123                 (struct NCR_700_Host_Parameters *)host->hostdata[0];
124
125         scsi_remove_host(host);
126         NCR_700_release(host);
127         free_irq(host->irq, host);
128         iounmap(hostdata->base);
129         kfree(hostdata);
130
131         return 0;
132 }
133
134 static struct platform_driver snirm710_driver = {
135         .probe  = snirm710_probe,
136         .remove = __devexit_p(snirm710_driver_remove),
137         .driver = {
138                 .name   = "snirm_53c710",
139         },
140 };
141
142 static int __init snirm710_init(void)
143 {
144         int err;
145
146         if ((err = platform_driver_register(&snirm710_driver))) {
147                 printk(KERN_ERR "Driver registration failed\n");
148                 return err;
149         }
150         return 0;
151 }
152
153 static void __exit snirm710_exit(void)
154 {
155         platform_driver_unregister(&snirm710_driver);
156 }
157
158 module_init(snirm710_init);
159 module_exit(snirm710_exit);