GNU Linux-libre 5.19-rc6-gnu
[releases.git] / drivers / scsi / qlogicfas.c
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