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
__qlogicfas_detect(struct scsi_host_template * host,int qbase,int qlirq)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
qlogicfas_detect(struct scsi_host_template * sht)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
qlogicfas_release(struct Scsi_Host * shost)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
qlogicfas_init(void)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
qlogicfas_exit(void)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