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