[SCSI] megaraid_sas: Fix FastPath I/O to work on degraded raid 1
[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/slab.h>
34 #include <linux/stat.h>
35 #include <linux/mm.h>
36 #include <linux/blkdev.h>
37 #include <linux/sched.h>
38 #include <linux/ioport.h>
39 #include <linux/dma-mapping.h>
40 #include <linux/platform_device.h>
41
42 #include <asm/page.h>
43 #include <asm/pgtable.h>
44 #include <asm/irq.h>
45 #include <asm/delay.h>
46
47 #include <scsi/scsi_host.h>
48 #include <scsi/scsi_device.h>
49 #include <scsi/scsi_transport.h>
50 #include <scsi/scsi_transport_spi.h>
51
52 #include "53c700.h"
53
54 MODULE_AUTHOR("Thomas Bogendörfer");
55 MODULE_DESCRIPTION("SNI RM 53c710 SCSI Driver");
56 MODULE_LICENSE("GPL");
57 MODULE_ALIAS("platform:snirm_53c710");
58
59 #define SNIRM710_CLOCK  32
60
61 static struct scsi_host_template snirm710_template = {
62         .name           = "SNI RM SCSI 53c710",
63         .proc_name      = "snirm_53c710",
64         .this_id        = 7,
65         .module         = THIS_MODULE,
66 };
67
68 static int __devinit snirm710_probe(struct platform_device *dev)
69 {
70         unsigned long base;
71         struct NCR_700_Host_Parameters *hostdata;
72         struct Scsi_Host *host;
73         struct  resource *res;
74
75         res = platform_get_resource(dev, IORESOURCE_MEM, 0);
76         if (!res)
77                 return -ENODEV;
78
79         base = res->start;
80         hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
81         if (!hostdata) {
82                 dev_printk(KERN_ERR, dev, "Failed to allocate host data\n");
83                 return -ENOMEM;
84         }
85
86         hostdata->dev = &dev->dev;
87         dma_set_mask(&dev->dev, DMA_BIT_MASK(32));
88         hostdata->base = ioremap_nocache(base, 0x100);
89         hostdata->differential = 0;
90
91         hostdata->clock = SNIRM710_CLOCK;
92         hostdata->force_le_on_be = 1;
93         hostdata->chip710 = 1;
94         hostdata->burst_length = 4;
95
96         host = NCR_700_detect(&snirm710_template, hostdata, &dev->dev);
97         if (!host)
98                 goto out_kfree;
99         host->this_id = 7;
100         host->base = base;
101         host->irq = platform_get_irq(dev, 0);
102         if(request_irq(host->irq, NCR_700_intr, IRQF_SHARED, "snirm710", host)) {
103                 printk(KERN_ERR "snirm710: request_irq failed!\n");
104                 goto out_put_host;
105         }
106
107         dev_set_drvdata(&dev->dev, host);
108         scsi_scan_host(host);
109
110         return 0;
111
112  out_put_host:
113         scsi_host_put(host);
114  out_kfree:
115         iounmap(hostdata->base);
116         kfree(hostdata);
117         return -ENODEV;
118 }
119
120 static int __exit snirm710_driver_remove(struct platform_device *dev)
121 {
122         struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
123         struct NCR_700_Host_Parameters *hostdata =
124                 (struct NCR_700_Host_Parameters *)host->hostdata[0];
125
126         scsi_remove_host(host);
127         NCR_700_release(host);
128         free_irq(host->irq, host);
129         iounmap(hostdata->base);
130         kfree(hostdata);
131
132         return 0;
133 }
134
135 static struct platform_driver snirm710_driver = {
136         .probe  = snirm710_probe,
137         .remove = __devexit_p(snirm710_driver_remove),
138         .driver = {
139                 .name   = "snirm_53c710",
140                 .owner  = THIS_MODULE,
141         },
142 };
143
144 static int __init snirm710_init(void)
145 {
146         return platform_driver_register(&snirm710_driver);
147 }
148
149 static void __exit snirm710_exit(void)
150 {
151         platform_driver_unregister(&snirm710_driver);
152 }
153
154 module_init(snirm710_init);
155 module_exit(snirm710_exit);