tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/* -*- mode: c; c-basic-offset: 8 -*- */
2
3/* PARISC LASI driver for the 53c700 chip
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 * Many thanks to Richard Hirst <rhirst@linuxcare.com> for patiently
27 * debugging this driver on the parisc architecture and suggesting
28 * many improvements and bug fixes.
29 *
30 * Thanks also go to Linuxcare Inc. for providing several PARISC
31 * machines for me to debug the driver on.
32 */
33
34#include <linux/kernel.h>
35#include <linux/module.h>
36#include <linux/init.h>
37#include <linux/types.h>
38#include <linux/stat.h>
39#include <linux/mm.h>
40#include <linux/blkdev.h>
41#include <linux/ioport.h>
42#include <linux/dma-mapping.h>
43
44#include <asm/page.h>
45#include <asm/pgtable.h>
46#include <asm/irq.h>
47#include <asm/hardware.h>
48#include <asm/parisc-device.h>
49#include <asm/delay.h>
50
51#include <scsi/scsi_host.h>
52#include <scsi/scsi_device.h>
53#include <scsi/scsi_transport.h>
54#include <scsi/scsi_transport_spi.h>
55
56#include "53c700.h"
57
58MODULE_AUTHOR("James Bottomley");
59MODULE_DESCRIPTION("lasi700 SCSI Driver");
60MODULE_LICENSE("GPL");
61
62#define LASI_700_SVERSION 0x00071
63#define LASI_710_SVERSION 0x00082
64
65#define LASI700_ID_TABLE { \
66 .hw_type = HPHW_FIO, \
67 .sversion = LASI_700_SVERSION, \
68 .hversion = HVERSION_ANY_ID, \
69 .hversion_rev = HVERSION_REV_ANY_ID, \
70}
71
72#define LASI710_ID_TABLE { \
73 .hw_type = HPHW_FIO, \
74 .sversion = LASI_710_SVERSION, \
75 .hversion = HVERSION_ANY_ID, \
76 .hversion_rev = HVERSION_REV_ANY_ID, \
77}
78
79#define LASI700_CLOCK 25
80#define LASI710_CLOCK 40
81#define LASI_SCSI_CORE_OFFSET 0x100
82
83static struct parisc_device_id lasi700_ids[] = {
84 LASI700_ID_TABLE,
85 LASI710_ID_TABLE,
86 { 0 }
87};
88
89static struct scsi_host_template lasi700_template = {
90 .name = "LASI SCSI 53c700",
91 .proc_name = "lasi700",
92 .this_id = 7,
93 .module = THIS_MODULE,
94};
95MODULE_DEVICE_TABLE(parisc, lasi700_ids);
96
97static int __init
98lasi700_probe(struct parisc_device *dev)
99{
100 unsigned long base = dev->hpa.start + LASI_SCSI_CORE_OFFSET;
101 struct NCR_700_Host_Parameters *hostdata;
102 struct Scsi_Host *host;
103
104 hostdata = kmalloc(sizeof(*hostdata), GFP_KERNEL);
105 if (!hostdata) {
106 printk(KERN_ERR "%s: Failed to allocate host data\n",
107 dev->dev.bus_id);
108 return -ENOMEM;
109 }
110 memset(hostdata, 0, sizeof(struct NCR_700_Host_Parameters));
111
112 hostdata->dev = &dev->dev;
113 dma_set_mask(&dev->dev, DMA_32BIT_MASK);
114 hostdata->base = ioremap_nocache(base, 0x100);
115 hostdata->differential = 0;
116
117 if (dev->id.sversion == LASI_700_SVERSION) {
118 hostdata->clock = LASI700_CLOCK;
119 hostdata->force_le_on_be = 1;
120 } else {
121 hostdata->clock = LASI710_CLOCK;
122 hostdata->force_le_on_be = 0;
123 hostdata->chip710 = 1;
124 hostdata->dmode_extra = DMODE_FC2;
125 hostdata->burst_length = 8;
126 }
127
128 host = NCR_700_detect(&lasi700_template, hostdata, &dev->dev);
129 if (!host)
130 goto out_kfree;
131 host->this_id = 7;
132 host->base = base;
133 host->irq = dev->irq;
134 if(request_irq(dev->irq, NCR_700_intr, IRQF_SHARED, "lasi700", host)) {
135 printk(KERN_ERR "lasi700: request_irq failed!\n");
136 goto out_put_host;
137 }
138
139 dev_set_drvdata(&dev->dev, host);
140 scsi_scan_host(host);
141
142 return 0;
143
144 out_put_host:
145 scsi_host_put(host);
146 out_kfree:
147 iounmap(hostdata->base);
148 kfree(hostdata);
149 return -ENODEV;
150}
151
152static int __exit
153lasi700_driver_remove(struct parisc_device *dev)
154{
155 struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
156 struct NCR_700_Host_Parameters *hostdata =
157 (struct NCR_700_Host_Parameters *)host->hostdata[0];
158
159 scsi_remove_host(host);
160 NCR_700_release(host);
161 free_irq(host->irq, host);
162 iounmap(hostdata->base);
163 kfree(hostdata);
164
165 return 0;
166}
167
168static struct parisc_driver lasi700_driver = {
169 .name = "lasi_scsi",
170 .id_table = lasi700_ids,
171 .probe = lasi700_probe,
172 .remove = __devexit_p(lasi700_driver_remove),
173};
174
175static int __init
176lasi700_init(void)
177{
178 return register_parisc_driver(&lasi700_driver);
179}
180
181static void __exit
182lasi700_exit(void)
183{
184 unregister_parisc_driver(&lasi700_driver);
185}
186
187module_init(lasi700_init);
188module_exit(lasi700_exit);