aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/scsi/sim710.c
blob: 3b3b56f4a8300ae7ebac68f4c27fb26863cef1e8 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
/*
 * sim710.c - Copyright (C) 1999 Richard Hirst <richard@sleepie.demon.co.uk>
 *
 *----------------------------------------------------------------------------
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by 
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *----------------------------------------------------------------------------
 *
 * MCA card detection code by Trent McNair. (now deleted)
 * Fixes to not explicitly nul bss data from Xavier Bestel.
 * Some multiboard fixes from Rolf Eike Beer.
 * Auto probing of EISA config space from Trevor Hemsley.
 *
 * Rewritten to use 53c700.c by James.Bottomley@SteelEye.com
 *
 */

#include <linux/module.h>
#include <linux/slab.h>

#include <linux/blkdev.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/eisa.h>
#include <linux/interrupt.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_spi.h>

#include "53c700.h"


/* Must be enough for EISA */
#define MAX_SLOTS 8
static __u8 __initdata id_array[MAX_SLOTS] = { [0 ... MAX_SLOTS-1] = 7 };

static char *sim710;		/* command line passed by insmod */

MODULE_AUTHOR("Richard Hirst");
MODULE_DESCRIPTION("Simple NCR53C710 driver");
MODULE_LICENSE("GPL");

module_param(sim710, charp, 0);

#ifdef MODULE
#define ARG_SEP ' '
#else
#define ARG_SEP ','
#endif

static __init int
param_setup(char *str)
{
	char *pos = str, *next;
	int slot = -1;

	while(pos != NULL && (next = strchr(pos, ':')) != NULL) {
		int val = (int)simple_strtoul(++next, NULL, 0);

		if(!strncmp(pos, "slot:", 5))
			slot = val;
		else if(!strncmp(pos, "id:", 3)) {
			if(slot == -1) {
				printk(KERN_WARNING "sim710: Must specify slot for id parameter\n");
			} else if(slot >= MAX_SLOTS) {
				printk(KERN_WARNING "sim710: Illegal slot %d for id %d\n", slot, val);
			} else {
				id_array[slot] = val;
			}
		}
		if((pos = strchr(pos, ARG_SEP)) != NULL)
			pos++;
	}
	return 1;
}
__setup("sim710=", param_setup);

static struct scsi_host_template sim710_driver_template = {
	.name			= "LSI (Symbios) 710 EISA",
	.proc_name		= "sim710",
	.this_id		= 7,
	.module			= THIS_MODULE,
};

static int sim710_probe_common(struct device *dev, unsigned long base_addr,
			       int irq, int clock, int differential,
			       int scsi_id)
{
	struct Scsi_Host * host = NULL;
	struct NCR_700_Host_Parameters *hostdata =
		kzalloc(sizeof(struct NCR_700_Host_Parameters),	GFP_KERNEL);

	printk(KERN_NOTICE "sim710: %s\n", dev_name(dev));
	printk(KERN_NOTICE "sim710: irq = %d, clock = %d, base = 0x%lx, scsi_id = %d\n",
	       irq, clock, base_addr, scsi_id);

	if(hostdata == NULL) {
		printk(KERN_ERR "sim710: Failed to allocate host data\n");
		goto out;
	}

	if(request_region(base_addr, 64, "sim710") == NULL) {
		printk(KERN_ERR "sim710: Failed to reserve IO region 0x%lx\n",
		       base_addr);
		goto out_free;
	}

	/* Fill in the three required pieces of hostdata */
	hostdata->base = ioport_map(base_addr, 64);
	hostdata->differential = differential;
	hostdata->clock = clock;
	hostdata->chip710 = 1;
	hostdata->burst_length = 8;

	/* and register the chip */
	if((host = NCR_700_detect(&sim710_driver_template, hostdata, dev))
	   == NULL) {
		printk(KERN_ERR "sim710: No host detected; card configuration problem?\n");
		goto out_release;
	}
	host->this_id = scsi_id;
	host->base = base_addr;
	host->irq = irq;
	if (request_irq(irq, NCR_700_intr, IRQF_SHARED, "sim710", host)) {
		printk(KERN_ERR "sim710: request_irq failed\n");
		goto out_put_host;
	}

	dev_set_drvdata(dev, host);
	scsi_scan_host(host);

	return 0;

 out_put_host:
	scsi_host_put(host);
 out_release:
	release_region(base_addr, 64);
 out_free:
	kfree(hostdata);
 out:
	return -ENODEV;
}

static int sim710_device_remove(struct device *dev)
{
	struct Scsi_Host *host = dev_get_drvdata(dev);
	struct NCR_700_Host_Parameters *hostdata =
		(struct NCR_700_Host_Parameters *)host->hostdata[0];

	scsi_remove_host(host);
	NCR_700_release(host);
	kfree(hostdata);
	free_irq(host->irq, host);
	release_region(host->base, 64);
	return 0;
}

#ifdef CONFIG_EISA
static struct eisa_device_id sim710_eisa_ids[] = {
	{ "CPQ4410" },
	{ "CPQ4411" },
	{ "HWP0C80" },
	{ "" }
};
MODULE_DEVICE_TABLE(eisa, sim710_eisa_ids);

static __init int
sim710_eisa_probe(struct device *dev)
{
	struct eisa_device *edev = to_eisa_device(dev);
	unsigned long io_addr = edev->base_addr;
	char eisa_cpq_irqs[] = { 11, 14, 15, 10, 9, 0 };
	char eisa_hwp_irqs[] = { 3, 4, 5, 7, 12, 10, 11, 0};
	char *eisa_irqs;
	unsigned char irq_index;
	unsigned char irq, differential = 0, scsi_id = 7;

	if(strcmp(edev->id.sig, "HWP0C80") == 0) {
		__u8 val;
		eisa_irqs =  eisa_hwp_irqs;
		irq_index = (inb(io_addr + 0xc85) & 0x7) - 1;

		val = inb(io_addr + 0x4);
		scsi_id = ffs(val) - 1;

		if(scsi_id > 7 || (val & ~(1<<scsi_id)) != 0) {
			printk(KERN_ERR "sim710.c, EISA card %s has incorrect scsi_id, setting to 7\n", dev_name(dev));
			scsi_id = 7;
		}
	} else {
		eisa_irqs = eisa_cpq_irqs;
		irq_index = inb(io_addr + 0xc88) & 0x07;
	}

	if(irq_index >= strlen(eisa_irqs)) {
		printk("sim710.c: irq nasty\n");
		return -ENODEV;
	}

	irq = eisa_irqs[irq_index];
		
	return sim710_probe_common(dev, io_addr, irq, 50,
				   differential, scsi_id);
}

static struct eisa_driver sim710_eisa_driver = {
	.id_table		= sim710_eisa_ids,
	.driver = {
		.name		= "sim710",
		.probe		= sim710_eisa_probe,
		.remove		= sim710_device_remove,
	},
};
#endif /* CONFIG_EISA */

static int __init sim710_init(void)
{
	int err = -ENODEV;

#ifdef MODULE
	if (sim710)
		param_setup(sim710);
#endif

#ifdef CONFIG_EISA
	err = eisa_driver_register(&sim710_eisa_driver);
#endif
	/* FIXME: what we'd really like to return here is -ENODEV if
	 * no devices have actually been found.  Instead, the err
	 * above actually only reports problems with kobject_register,
	 * so for the moment return success */

	return 0;
}

static void __exit sim710_exit(void)
{
#ifdef CONFIG_EISA
	eisa_driver_unregister(&sim710_eisa_driver);
#endif
}

module_init(sim710_init);
module_exit(sim710_exit);