xref: /linux/drivers/scsi/qlogicfas.c (revision dec1c62e91ba268ab2a6e339d4d7a59287d5eba1)
1 /*
2  * Qlogic FAS408 ISA card driver
3  *
4  * Copyright 1994, Tom Zerucha.
5  * tz@execpc.com
6  *
7  * Redistributable under terms of the GNU General Public License
8  *
9  * For the avoidance of doubt the "preferred form" of this code is one which
10  * is in an open non patent encumbered format. Where cryptographic key signing
11  * forms part of the process of creating an executable the information
12  * including keys needed to generate an equivalently functional executable
13  * are deemed to be part of the source code.
14  *
15  * Check qlogicfas408.c for more credits and info.
16  */
17 
18 #include <linux/module.h>
19 #include <linux/blkdev.h>		/* to get disk capacity */
20 #include <linux/kernel.h>
21 #include <linux/string.h>
22 #include <linux/init.h>
23 #include <linux/interrupt.h>
24 #include <linux/ioport.h>
25 #include <linux/proc_fs.h>
26 #include <linux/unistd.h>
27 #include <linux/spinlock.h>
28 #include <linux/stat.h>
29 
30 #include <asm/io.h>
31 #include <asm/irq.h>
32 #include <asm/dma.h>
33 
34 #include <scsi/scsi.h>
35 #include <scsi/scsi_cmnd.h>
36 #include <scsi/scsi_device.h>
37 #include <scsi/scsi_eh.h>
38 #include <scsi/scsi_host.h>
39 #include <scsi/scsi_tcq.h>
40 #include "qlogicfas408.h"
41 
42 /* Set the following to 2 to use normal interrupt (active high/totempole-
43  * tristate), otherwise use 0 (REQUIRED FOR PCMCIA) for active low, open
44  * drain
45  */
46 #define INT_TYPE	2
47 
48 static char qlogicfas_name[] = "qlogicfas";
49 
50 /*
51  *	Look for qlogic card and init if found
52  */
53 
54 static struct Scsi_Host *__qlogicfas_detect(struct scsi_host_template *host,
55 								int qbase,
56 								int qlirq)
57 {
58 	int qltyp;		/* type of chip */
59 	int qinitid;
60 	struct Scsi_Host *hreg;	/* registered host structure */
61 	struct qlogicfas408_priv *priv;
62 
63 	/*	Qlogic Cards only exist at 0x230 or 0x330 (the chip itself
64 	 *	decodes the address - I check 230 first since MIDI cards are
65 	 *	typically at 0x330
66 	 *
67 	 *	Theoretically, two Qlogic cards can coexist in the same system.
68 	 *	This should work by simply using this as a loadable module for
69 	 *	the second card, but I haven't tested this.
70 	 */
71 
72 	if (!qbase || qlirq == -1)
73 		goto err;
74 
75 	if (!request_region(qbase, 0x10, qlogicfas_name)) {
76 		printk(KERN_INFO "%s: address %#x is busy\n", qlogicfas_name,
77 							      qbase);
78 		goto err;
79 	}
80 
81 	if (!qlogicfas408_detect(qbase, INT_TYPE)) {
82 		printk(KERN_WARNING "%s: probe failed for %#x\n",
83 								qlogicfas_name,
84 								qbase);
85 		goto err_release_mem;
86 	}
87 
88 	printk(KERN_INFO "%s: Using preset base address of %03x,"
89 			 " IRQ %d\n", qlogicfas_name, qbase, qlirq);
90 
91 	qltyp = qlogicfas408_get_chip_type(qbase, INT_TYPE);
92 	qinitid = host->this_id;
93 	if (qinitid < 0)
94 		qinitid = 7;	/* if no ID, use 7 */
95 
96 	qlogicfas408_setup(qbase, qinitid, INT_TYPE);
97 
98 	hreg = scsi_host_alloc(host, sizeof(struct qlogicfas408_priv));
99 	if (!hreg)
100 		goto err_release_mem;
101 	priv = get_priv_by_host(hreg);
102 	hreg->io_port = qbase;
103 	hreg->n_io_port = 16;
104 	hreg->dma_channel = -1;
105 	if (qlirq != -1)
106 		hreg->irq = qlirq;
107 	priv->qbase = qbase;
108 	priv->qlirq = qlirq;
109 	priv->qinitid = qinitid;
110 	priv->shost = hreg;
111 	priv->int_type = INT_TYPE;
112 
113 	sprintf(priv->qinfo,
114 		"Qlogicfas Driver version 0.46, chip %02X at %03X, IRQ %d, TPdma:%d",
115 		qltyp, qbase, qlirq, QL_TURBO_PDMA);
116 	host->name = qlogicfas_name;
117 
118 	if (request_irq(qlirq, qlogicfas408_ihandl, 0, qlogicfas_name, hreg))
119 		goto free_scsi_host;
120 
121 	if (scsi_add_host(hreg, NULL))
122 		goto free_interrupt;
123 
124 	scsi_scan_host(hreg);
125 
126 	return hreg;
127 
128 free_interrupt:
129 	free_irq(qlirq, hreg);
130 
131 free_scsi_host:
132 	scsi_host_put(hreg);
133 
134 err_release_mem:
135 	release_region(qbase, 0x10);
136 err:
137 	return NULL;
138 }
139 
140 #define MAX_QLOGICFAS	8
141 static struct qlogicfas408_priv *cards;
142 static int iobase[MAX_QLOGICFAS];
143 static int irq[MAX_QLOGICFAS] = { [0 ... MAX_QLOGICFAS-1] = -1 };
144 module_param_hw_array(iobase, int, ioport, NULL, 0);
145 module_param_hw_array(irq, int, irq, NULL, 0);
146 MODULE_PARM_DESC(iobase, "I/O address");
147 MODULE_PARM_DESC(irq, "IRQ");
148 
149 static int qlogicfas_detect(struct scsi_host_template *sht)
150 {
151 	struct Scsi_Host *shost;
152 	struct qlogicfas408_priv *priv;
153 	int num;
154 
155 	for (num = 0; num < MAX_QLOGICFAS; num++) {
156 		shost = __qlogicfas_detect(sht, iobase[num], irq[num]);
157 		if (shost == NULL) {
158 			/* no more devices */
159 			break;
160 		}
161 		priv = get_priv_by_host(shost);
162 		priv->next = cards;
163 		cards = priv;
164 	}
165 
166 	return num;
167 }
168 
169 static int qlogicfas_release(struct Scsi_Host *shost)
170 {
171 	struct qlogicfas408_priv *priv = get_priv_by_host(shost);
172 
173 	scsi_remove_host(shost);
174 	if (shost->irq) {
175 		qlogicfas408_disable_ints(priv);
176 		free_irq(shost->irq, shost);
177 	}
178 	if (shost->io_port && shost->n_io_port)
179 		release_region(shost->io_port, shost->n_io_port);
180 	scsi_host_put(shost);
181 
182 	return 0;
183 }
184 
185 /*
186  *	The driver template is also needed for PCMCIA
187  */
188 static struct scsi_host_template qlogicfas_driver_template = {
189 	.module			= THIS_MODULE,
190 	.name			= qlogicfas_name,
191 	.proc_name		= qlogicfas_name,
192 	.info			= qlogicfas408_info,
193 	.queuecommand		= qlogicfas408_queuecommand,
194 	.eh_abort_handler	= qlogicfas408_abort,
195 	.eh_host_reset_handler	= qlogicfas408_host_reset,
196 	.bios_param		= qlogicfas408_biosparam,
197 	.can_queue		= 1,
198 	.this_id		= -1,
199 	.sg_tablesize		= SG_ALL,
200 	.dma_boundary		= PAGE_SIZE - 1,
201 };
202 
203 static __init int qlogicfas_init(void)
204 {
205 	if (!qlogicfas_detect(&qlogicfas_driver_template)) {
206 		/* no cards found */
207 		printk(KERN_INFO "%s: no cards were found, please specify "
208 				 "I/O address and IRQ using iobase= and irq= "
209 				 "options", qlogicfas_name);
210 		return -ENODEV;
211 	}
212 
213 	return 0;
214 }
215 
216 static __exit void qlogicfas_exit(void)
217 {
218 	struct qlogicfas408_priv *priv;
219 
220 	for (priv = cards; priv != NULL; priv = priv->next)
221 		qlogicfas_release(priv->shost);
222 }
223 
224 MODULE_AUTHOR("Tom Zerucha, Michael Griffith");
225 MODULE_DESCRIPTION("Driver for the Qlogic FAS408 based ISA card");
226 MODULE_LICENSE("GPL");
227 module_init(qlogicfas_init);
228 module_exit(qlogicfas_exit);
229 
230