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 #include <linux/slab.h>
44
45 #include <asm/page.h>
46 #include <asm/pgtable.h>
47 #include <asm/irq.h>
48 #include <asm/hardware.h>
49 #include <asm/parisc-device.h>
50 #include <asm/delay.h>
51
52 #include <scsi/scsi_host.h>
53 #include <scsi/scsi_device.h>
54 #include <scsi/scsi_transport.h>
55 #include <scsi/scsi_transport_spi.h>
56
57 #include "53c700.h"
58
59 MODULE_AUTHOR("James Bottomley");
60 MODULE_DESCRIPTION("lasi700 SCSI Driver");
61 MODULE_LICENSE("GPL");
62
63 #define LASI_700_SVERSION 0x00071
64 #define LASI_710_SVERSION 0x00082
65
66 #define LASI700_ID_TABLE { \
67 .hw_type = HPHW_FIO, \
68 .sversion = LASI_700_SVERSION, \
69 .hversion = HVERSION_ANY_ID, \
70 .hversion_rev = HVERSION_REV_ANY_ID, \
71 }
72
73 #define LASI710_ID_TABLE { \
74 .hw_type = HPHW_FIO, \
75 .sversion = LASI_710_SVERSION, \
76 .hversion = HVERSION_ANY_ID, \
77 .hversion_rev = HVERSION_REV_ANY_ID, \
78 }
79
80 #define LASI700_CLOCK 25
81 #define LASI710_CLOCK 40
82 #define LASI_SCSI_CORE_OFFSET 0x100
83
84 static const struct parisc_device_id lasi700_ids[] __initconst = {
85 LASI700_ID_TABLE,
86 LASI710_ID_TABLE,
87 { 0 }
88 };
89
90 static struct scsi_host_template lasi700_template = {
91 .name = "LASI SCSI 53c700",
92 .proc_name = "lasi700",
93 .this_id = 7,
94 .module = THIS_MODULE,
95 };
96 MODULE_DEVICE_TABLE(parisc, lasi700_ids);
97
98 static int __init
lasi700_probe(struct parisc_device * dev)99 lasi700_probe(struct parisc_device *dev)
100 {
101 unsigned long base = dev->hpa.start + LASI_SCSI_CORE_OFFSET;
102 struct NCR_700_Host_Parameters *hostdata;
103 struct Scsi_Host *host;
104
105 hostdata = kzalloc(sizeof(*hostdata), GFP_KERNEL);
106 if (!hostdata) {
107 dev_printk(KERN_ERR, &dev->dev, "Failed to allocate host data\n");
108 return -ENOMEM;
109 }
110
111 hostdata->dev = &dev->dev;
112 dma_set_mask(&dev->dev, DMA_BIT_MASK(32));
113 hostdata->base = ioremap_nocache(base, 0x100);
114 hostdata->differential = 0;
115
116 if (dev->id.sversion == LASI_700_SVERSION) {
117 hostdata->clock = LASI700_CLOCK;
118 hostdata->force_le_on_be = 1;
119 } else {
120 hostdata->clock = LASI710_CLOCK;
121 hostdata->force_le_on_be = 0;
122 hostdata->chip710 = 1;
123 hostdata->dmode_extra = DMODE_FC2;
124 hostdata->burst_length = 8;
125 }
126
127 host = NCR_700_detect(&lasi700_template, hostdata, &dev->dev);
128 if (!host)
129 goto out_kfree;
130 host->this_id = 7;
131 host->base = base;
132 host->irq = dev->irq;
133 if(request_irq(dev->irq, NCR_700_intr, IRQF_SHARED, "lasi700", host)) {
134 printk(KERN_ERR "lasi700: request_irq failed!\n");
135 goto out_put_host;
136 }
137
138 dev_set_drvdata(&dev->dev, host);
139 scsi_scan_host(host);
140
141 return 0;
142
143 out_put_host:
144 scsi_host_put(host);
145 out_kfree:
146 iounmap(hostdata->base);
147 kfree(hostdata);
148 return -ENODEV;
149 }
150
151 static int __exit
lasi700_driver_remove(struct parisc_device * dev)152 lasi700_driver_remove(struct parisc_device *dev)
153 {
154 struct Scsi_Host *host = dev_get_drvdata(&dev->dev);
155 struct NCR_700_Host_Parameters *hostdata =
156 (struct NCR_700_Host_Parameters *)host->hostdata[0];
157
158 scsi_remove_host(host);
159 NCR_700_release(host);
160 free_irq(host->irq, host);
161 iounmap(hostdata->base);
162 kfree(hostdata);
163
164 return 0;
165 }
166
167 static struct parisc_driver lasi700_driver __refdata = {
168 .name = "lasi_scsi",
169 .id_table = lasi700_ids,
170 .probe = lasi700_probe,
171 .remove = __exit_p(lasi700_driver_remove),
172 };
173
174 static int __init
lasi700_init(void)175 lasi700_init(void)
176 {
177 return register_parisc_driver(&lasi700_driver);
178 }
179
180 static void __exit
lasi700_exit(void)181 lasi700_exit(void)
182 {
183 unregister_parisc_driver(&lasi700_driver);
184 }
185
186 module_init(lasi700_init);
187 module_exit(lasi700_exit);
188
