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.h"
35 #include <scsi/scsi_host.h>
36 #include "qlogicfas408.h"
37
38 /* Set the following to 2 to use normal interrupt (active high/totempole-
39 * tristate), otherwise use 0 (REQUIRED FOR PCMCIA) for active low, open
40 * drain
41 */
42 #define INT_TYPE 2
43
44 static char qlogicfas_name[] = "qlogicfas";
45
46 /*
47 * Look for qlogic card and init if found
48 */
49
50 static struct Scsi_Host *__qlogicfas_detect(struct scsi_host_template *host,
51 int qbase,
52 int qlirq)
53 {
54 int qltyp; /* type of chip */
55 int qinitid;
56 struct Scsi_Host *hreg; /* registered host structure */
57 struct qlogicfas408_priv *priv;
58
59 /* Qlogic Cards only exist at 0x230 or 0x330 (the chip itself
60 * decodes the address - I check 230 first since MIDI cards are
61 * typically at 0x330
62 *
63 * Theoretically, two Qlogic cards can coexist in the same system.
64 * This should work by simply using this as a loadable module for
65 * the second card, but I haven't tested this.
66 */
67
68 if (!qbase || qlirq == -1)
69 goto err;
70
71 if (!request_region(qbase, 0x10, qlogicfas_name)) {
72 printk(KERN_INFO "%s: address %#x is busy\n", qlogicfas_name,
73 qbase);
74 goto err;
75 }
76
77 if (!qlogicfas408_detect(qbase, INT_TYPE)) {
78 printk(KERN_WARNING "%s: probe failed for %#x\n",
79 qlogicfas_name,
80 qbase);
81 goto err_release_mem;
82 }
83
84 printk(KERN_INFO "%s: Using preset base address of %03x,"
85 " IRQ %d\n", qlogicfas_name, qbase, qlirq);
86
87 qltyp = qlogicfas408_get_chip_type(qbase, INT_TYPE);
88 qinitid = host->this_id;
89 if (qinitid < 0)
90 qinitid = 7; /* if no ID, use 7 */
91
92 qlogicfas408_setup(qbase, qinitid, INT_TYPE);
93
94 hreg = scsi_host_alloc(host, sizeof(struct qlogicfas408_priv));
95 if (!hreg)
96 goto err_release_mem;
97 priv = get_priv_by_host(hreg);
98 hreg->io_port = qbase;
99 hreg->n_io_port = 16;
100 hreg->dma_channel = -1;
101 if (qlirq != -1)
102 hreg->irq = qlirq;
103 priv->qbase = qbase;
104 priv->qlirq = qlirq;
105 priv->qinitid = qinitid;
106 priv->shost = hreg;
107 priv->int_type = INT_TYPE;
108
109 sprintf(priv->qinfo,
110 "Qlogicfas Driver version 0.46, chip %02X at %03X, IRQ %d, TPdma:%d",
111 qltyp, qbase, qlirq, QL_TURBO_PDMA);
112 host->name = qlogicfas_name;
113
114 if (request_irq(qlirq, qlogicfas408_ihandl, 0, qlogicfas_name, hreg))
115 goto free_scsi_host;
116
117 if (scsi_add_host(hreg, NULL))
118 goto free_interrupt;
119
120 scsi_scan_host(hreg);
121
122 return hreg;
123
124 free_interrupt:
125 free_irq(qlirq, hreg);
126
127 free_scsi_host:
128 scsi_host_put(hreg);
129
130 err_release_mem:
131 release_region(qbase, 0x10);
132 err:
133 return NULL;
134 }
135
136 #define MAX_QLOGICFAS 8
137 static struct qlogicfas408_priv *cards;
138 static int iobase[MAX_QLOGICFAS];
139 static int irq[MAX_QLOGICFAS] = { [0 ... MAX_QLOGICFAS-1] = -1 };
140 module_param_array(iobase, int, NULL, 0);
141 module_param_array(irq, int, NULL, 0);
142 MODULE_PARM_DESC(iobase, "I/O address");
143 MODULE_PARM_DESC(irq, "IRQ");
144
145 static int __devinit qlogicfas_detect(struct scsi_host_template *sht)
146 {
147 struct Scsi_Host *shost;
148 struct qlogicfas408_priv *priv;
149 int num;
150
151 for (num = 0; num < MAX_QLOGICFAS; num++) {
152 shost = __qlogicfas_detect(sht, iobase[num], irq[num]);
153 if (shost == NULL) {
154 /* no more devices */
155 break;
156 }
157 priv = get_priv_by_host(shost);
158 priv->next = cards;
159 cards = priv;
160 }
161
162 return num;
163 }
164
165 static int qlogicfas_release(struct Scsi_Host *shost)
166 {
167 struct qlogicfas408_priv *priv = get_priv_by_host(shost);
168
169 scsi_remove_host(shost);
170 if (shost->irq) {
171 qlogicfas408_disable_ints(priv);
172 free_irq(shost->irq, shost);
173 }
174 if (shost->dma_channel != 0xff)
175 free_dma(shost->dma_channel);
176 if (shost->io_port && shost->n_io_port)
177 release_region(shost->io_port, shost->n_io_port);
178 scsi_host_put(shost);
179
180 return 0;
181 }
182
183 /*
184 * The driver template is also needed for PCMCIA
185 */
186 static struct scsi_host_template qlogicfas_driver_template = {
187 .module = THIS_MODULE,
188 .name = qlogicfas_name,
189 .proc_name = qlogicfas_name,
190 .info = qlogicfas408_info,
191 .queuecommand = qlogicfas408_queuecommand,
192 .eh_abort_handler = qlogicfas408_abort,
193 .eh_bus_reset_handler = qlogicfas408_bus_reset,
194 .bios_param = qlogicfas408_biosparam,
195 .can_queue = 1,
196 .this_id = -1,
197 .sg_tablesize = SG_ALL,
198 .cmd_per_lun = 1,
199 .use_clustering = DISABLE_CLUSTERING,
200 };
201
202 static __init int qlogicfas_init(void)
203 {
204 if (!qlogicfas_detect(&qlogicfas_driver_template)) {
205 /* no cards found */
206 printk(KERN_INFO "%s: no cards were found, please specify "
207 "I/O address and IRQ using iobase= and irq= "
208 "options", qlogicfas_name);
209 return -ENODEV;
210 }
211
212 return 0;
213 }
214
215 static __exit void qlogicfas_exit(void)
216 {
217 struct qlogicfas408_priv *priv;
218
219 for (priv = cards; priv != NULL; priv = priv->next)
220 qlogicfas_release(priv->shost);
221 }
222
223 MODULE_AUTHOR("Tom Zerucha, Michael Griffith");
224 MODULE_DESCRIPTION("Driver for the Qlogic FAS408 based ISA card");
225 MODULE_LICENSE("GPL");
226 module_init(qlogicfas_init);
227 module_exit(qlogicfas_exit);
228
229
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