drivers/scsi/dmx3191d.c

   1
   2 /*
   3     dmx3191d.c - midlevel driver for the Domex DMX3191D SCSI card.
   4     Copyright (C) 2000 by Massimo Piccioni <dafastidio@libero.it>
   5
   6     Based on the generic NCR5380 driver by Drew Eckhardt et al.
   7
   8     This program is free software; you can redistribute it and/or modify
   9     it under the terms of the GNU General Public License as published by
  10     the Free Software Foundation; either version 2 of the License, or
  11     (at your option) any later version.
  12
  13     This program is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16     GNU General Public License for more details.
  17
  18     You should have received a copy of the GNU General Public License
  19     along with this program; if not, write to the Free Software
  20     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include <asm/io.h>
  24 #include <asm/system.h>
  25 #include <linux/blk.h>
  26 #include <linux/init.h>
  27 #include <linux/ioport.h>
  28 #include <linux/module.h>
  29 #include <linux/pci.h>
  30 #include <linux/sched.h>
  31 #include <linux/signal.h>
  32 #include <linux/stat.h>
  33 #include <linux/version.h>
  34
  35 #include "scsi.h"
  36 #include "hosts.h"
  37 #include "constants.h"
  38 #include "sd.h"
  39
  40 #include "dmx3191d.h"
  41
  42 /* play with these values to tune up your system performances */
  43 /* default setting from g_NCR5380.c */
  44 /*
  45 #define USLEEP
  46 #define USLEEP_POLL             1
  47 #define USLEEP_SLEEP            20
  48 #define USLEEP_WAITLONG         500
  49 */
  50
  51 #define AUTOSENSE
  52 #include "NCR5380.h"
  53 #include "NCR5380.c"
  54
  55
  56 int __init dmx3191d_detect(Scsi_Host_Template *tmpl) {
  57         int boards = 0;
  58         struct Scsi_Host *instance = NULL;
  59         struct pci_dev *pdev = NULL;
  60
  61         if (!pci_present()) {
  62                 dmx3191d_printk("PCI support not enabled\n");
  63                 return 0;
  64         }
  65
  66         tmpl->proc_name = DMX3191D_DRIVER_NAME;
  67
  68         while ((pdev = pci_find_device(PCI_VENDOR_ID_DOMEX,
  69                         PCI_DEVICE_ID_DOMEX_DMX3191D, pdev))) {
  70
  71                 unsigned long port = pci_resource_start (pdev, 0);
  72
  73                 if (pci_enable_device(pdev))
  74                         continue;
  75
  76                 if (check_region(port, DMX3191D_REGION)) {
  77                         dmx3191d_printk("region 0x%lx-0x%lx already reserved\n",
  78                                 port, port + DMX3191D_REGION);
  79                         continue;
  80                 }
  81
  82                 request_region(port, DMX3191D_REGION, DMX3191D_DRIVER_NAME);
  83
  84                 instance = scsi_register(tmpl, sizeof(struct NCR5380_hostdata));
  85                 if(instance == NULL)
  86                 {
  87                         release_region(port, DMX3191D_REGION);
  88                         continue;
  89                 }
  90                 instance->io_port = port;
  91                 instance->irq = pdev->irq;
  92                 NCR5380_init(instance, FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E);
  93
  94                 if (request_irq(pdev->irq, dmx3191d_do_intr, SA_SHIRQ,
  95                                 DMX3191D_DRIVER_NAME, instance)) {
  96                         dmx3191d_printk("irq %d not available\n", pdev->irq);
  97                         /* Steam powered scsi controllers run without an IRQ
  98                            anyway */
  99                         instance->irq = IRQ_NONE;
 100                 }
 101
 102                 boards++;
 103         }
 104         return boards;
 105 }
 106
 107 const char * dmx3191d_info(struct Scsi_Host *host) {
 108         static const char *info ="Domex DMX3191D";
 109
 110         return info;
 111 }
 112
 113 int dmx3191d_release_resources(struct Scsi_Host *instance)
 114 {
 115         release_region(instance->io_port, DMX3191D_REGION);
 116         if(instance->irq!=IRQ_NONE)
 117                 free_irq(instance->irq, instance);
 118
 119         return 0;
 120 }
 121
 122
 123 static Scsi_Host_Template driver_template = DMX3191D;
 124 #include "scsi_module.c"
 125