summaryrefslogtreecommitdiff
path: root/drivers/scsi/qlogicfas.c
blob: 8f05e3707d6926c0655e6a53212f15419e2b8d45 (plain)
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
/*
 * Qlogic FAS408 ISA card driver
 *
 * Copyright 1994, Tom Zerucha.   
 * tz@execpc.com
 * 
 * Redistributable under terms of the GNU General Public License
 *
 * For the avoidance of doubt the "preferred form" of this code is one which
 * is in an open non patent encumbered format. Where cryptographic key signing
 * forms part of the process of creating an executable the information
 * including keys needed to generate an equivalently functional executable
 * are deemed to be part of the source code.
 *
 * Check qlogicfas408.c for more credits and info.
 */

#include <linux/module.h>
#include <linux/blkdev.h>		/* to get disk capacity */
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/proc_fs.h>
#include <linux/unistd.h>
#include <linux/spinlock.h>
#include <linux/stat.h>

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/dma.h>

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include "qlogicfas408.h"

/* Set the following to 2 to use normal interrupt (active high/totempole-
 * tristate), otherwise use 0 (REQUIRED FOR PCMCIA) for active low, open
 * drain
 */
#define INT_TYPE	2

static char qlogicfas_name[] = "qlogicfas";

/*
 *	Look for qlogic card and init if found 
 */
 
static struct Scsi_Host *__qlogicfas_detect(struct scsi_host_template *host,
								int qbase,
								int qlirq)
{
	int qltyp;		/* type of chip */
	int qinitid;
	struct Scsi_Host *hreg;	/* registered host structure */
	struct qlogicfas408_priv *priv;

	/*	Qlogic Cards only exist at 0x230 or 0x330 (the chip itself
	 *	decodes the address - I check 230 first since MIDI cards are
	 *	typically at 0x330
	 *
	 *	Theoretically, two Qlogic cards can coexist in the same system.
	 *	This should work by simply using this as a loadable module for
	 *	the second card, but I haven't tested this.
	 */

	if (!qbase || qlirq == -1)
		goto err;

	if (!request_region(qbase, 0x10, qlogicfas_name)) {
		printk(KERN_INFO "%s: address %#x is busy\n", qlogicfas_name,
							      qbase);
		goto err;
	}

	if (!qlogicfas408_detect(qbase, INT_TYPE)) {
		printk(KERN_WARNING "%s: probe failed for %#x\n",
								qlogicfas_name,
								qbase);
		goto err_release_mem;
	}

	printk(KERN_INFO "%s: Using preset base address of %03x,"
			 " IRQ %d\n", qlogicfas_name, qbase, qlirq);

	qltyp = qlogicfas408_get_chip_type(qbase, INT_TYPE);
	qinitid = host->this_id;
	if (qinitid < 0)
		qinitid = 7;	/* if no ID, use 7 */

	qlogicfas408_setup(qbase, qinitid, INT_TYPE);

	hreg = scsi_host_alloc(host, sizeof(struct qlogicfas408_priv));
	if (!hreg)
		goto err_release_mem;
	priv = get_priv_by_host(hreg);
	hreg->io_port = qbase;
	hreg->n_io_port = 16;
	hreg->dma_channel = -1;
	if (qlirq != -1)
		hreg->irq = qlirq;
	priv->qbase = qbase;
	priv->qlirq = qlirq;
	priv->qinitid = qinitid;
	priv->shost = hreg;
	priv->int_type = INT_TYPE;

	sprintf(priv->qinfo,
		"Qlogicfas Driver version 0.46, chip %02X at %03X, IRQ %d, TPdma:%d",
		qltyp, qbase, qlirq, QL_TURBO_PDMA);
	host->name = qlogicfas_name;

	if (request_irq(qlirq, qlogicfas408_ihandl, 0, qlogicfas_name, hreg))
		goto free_scsi_host;

	if (scsi_add_host(hreg, NULL))
		goto free_interrupt;

	scsi_scan_host(hreg);

	return hreg;

free_interrupt:
	free_irq(qlirq, hreg);

free_scsi_host:
	scsi_host_put(hreg);

err_release_mem:
	release_region(qbase, 0x10);
err:
	return NULL;
}

#define MAX_QLOGICFAS	8
static struct qlogicfas408_priv *cards;
static int iobase[MAX_QLOGICFAS];
static int irq[MAX_QLOGICFAS] = { [0 ... MAX_QLOGICFAS-1] = -1 };
module_param_hw_array(iobase, int, ioport, NULL, 0);
module_param_hw_array(irq, int, irq, NULL, 0);
MODULE_PARM_DESC(iobase, "I/O address");
MODULE_PARM_DESC(irq, "IRQ");

static int qlogicfas_detect(struct scsi_host_template *sht)
{
	struct Scsi_Host *shost;
	struct qlogicfas408_priv *priv;
	int num;

	for (num = 0; num < MAX_QLOGICFAS; num++) {
		shost = __qlogicfas_detect(sht, iobase[num], irq[num]);
		if (shost == NULL) {
			/* no more devices */
			break;
		}
		priv = get_priv_by_host(shost);
		priv->next = cards;
		cards = priv;
	}

	return num;
}

static int qlogicfas_release(struct Scsi_Host *shost)
{
	struct qlogicfas408_priv *priv = get_priv_by_host(shost);

	scsi_remove_host(shost);
	if (shost->irq) {
		qlogicfas408_disable_ints(priv);	
		free_irq(shost->irq, shost);
	}
	if (shost->io_port && shost->n_io_port)
		release_region(shost->io_port, shost->n_io_port);
	scsi_host_put(shost);

	return 0;
}

/*
 *	The driver template is also needed for PCMCIA
 */
static struct scsi_host_template qlogicfas_driver_template = {
	.module			= THIS_MODULE,
	.name			= qlogicfas_name,
	.proc_name		= qlogicfas_name,
	.info			= qlogicfas408_info,
	.queuecommand		= qlogicfas408_queuecommand,
	.eh_abort_handler	= qlogicfas408_abort,
	.eh_host_reset_handler	= qlogicfas408_host_reset,
	.bios_param		= qlogicfas408_biosparam,
	.can_queue		= 1,
	.this_id		= -1,
	.sg_tablesize		= SG_ALL,
	.dma_boundary		= PAGE_SIZE - 1,
};

static __init int qlogicfas_init(void)
{
	if (!qlogicfas_detect(&qlogicfas_driver_template)) {
		/* no cards found */
		printk(KERN_INFO "%s: no cards were found, please specify "
				 "I/O address and IRQ using iobase= and irq= "
				 "options", qlogicfas_name);
		return -ENODEV;
	}

	return 0;
}

static __exit void qlogicfas_exit(void)
{
	struct qlogicfas408_priv *priv;

	for (priv = cards; priv != NULL; priv = priv->next)
		qlogicfas_release(priv->shost);
}

MODULE_AUTHOR("Tom Zerucha, Michael Griffith");
MODULE_DESCRIPTION("Driver for the Qlogic FAS408 based ISA card");
MODULE_LICENSE("GPL");
module_init(qlogicfas_init);
module_exit(qlogicfas_exit);