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
59MODULE_AUTHOR("James Bottomley");
60MODULE_DESCRIPTION("lasi700 SCSI Driver");
61MODULE_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
84static struct parisc_device_id lasi700_ids[] = {
85	LASI700_ID_TABLE,
86	LASI710_ID_TABLE,
87	{ 0 }
88};
89
90static struct scsi_host_template lasi700_template = {
91	.name		= "LASI SCSI 53c700",
92	.proc_name	= "lasi700",
93	.this_id	= 7,
94	.module		= THIS_MODULE,
95};
96MODULE_DEVICE_TABLE(parisc, lasi700_ids);
97
98static int __init
99lasi700_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
151static int __exit
152lasi700_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
167static struct parisc_driver lasi700_driver = {
168	.name =		"lasi_scsi",
169	.id_table =	lasi700_ids,
170	.probe =	lasi700_probe,
171	.remove =	lasi700_driver_remove,
172};
173
174static int __init
175lasi700_init(void)
176{
177	return register_parisc_driver(&lasi700_driver);
178}
179
180static void __exit
181lasi700_exit(void)
182{
183	unregister_parisc_driver(&lasi700_driver);
184}
185
186module_init(lasi700_init);
187module_exit(lasi700_exit);
188