drivers/scsi/dmx3191d.c

   1 /*
   2     dmx3191d.c - driver for the Domex DMX3191D SCSI card.
   3     Copyright (C) 2000 by Massimo Piccioni <dafastidio@libero.it>
   4     Portions Copyright (C) 2004 by Christoph Hellwig <hch@lst.de>
   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 <linux/init.h>
  24 #include <linux/ioport.h>
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/pci.h>
  28 #include <linux/interrupt.h>
  29 #include <asm/io.h>
  30
  31 #include <scsi/scsi_host.h>
  32
  33 /*
  34  * Definitions for the generic 5380 driver.
  35  */
  36
  37 #define DONT_USE_INTR
  38
  39 #define NCR5380_read(reg)               inb(instance->io_port + reg)
  40 #define NCR5380_write(reg, value)       outb(value, instance->io_port + reg)
  41
  42 #define NCR5380_implementation_fields   /* none */
  43
  44 #include "NCR5380.h"
  45 #include "NCR5380.c"
  46
  47 #define DMX3191D_DRIVER_NAME    "dmx3191d"
  48 #define DMX3191D_REGION_LEN     8
  49
  50
  51 static struct scsi_host_template dmx3191d_driver_template = {
  52         .module                 = THIS_MODULE,
  53         .proc_name              = DMX3191D_DRIVER_NAME,
  54         .name                   = "Domex DMX3191D",
  55         .info                   = NCR5380_info,
  56         .queuecommand           = NCR5380_queue_command,
  57         .eh_abort_handler       = NCR5380_abort,
  58         .eh_bus_reset_handler   = NCR5380_bus_reset,
  59         .can_queue              = 32,
  60         .this_id                = 7,
  61         .sg_tablesize           = SG_ALL,
  62         .cmd_per_lun            = 2,
  63         .use_clustering         = DISABLE_CLUSTERING,
  64         .cmd_size               = NCR5380_CMD_SIZE,
  65         .max_sectors            = 128,
  66 };
  67
  68 static int dmx3191d_probe_one(struct pci_dev *pdev,
  69                               const struct pci_device_id *id)
  70 {
  71         struct Scsi_Host *shost;
  72         unsigned long io;
  73         int error = -ENODEV;
  74
  75         if (pci_enable_device(pdev))
  76                 goto out;
  77
  78         io = pci_resource_start(pdev, 0);
  79         if (!request_region(io, DMX3191D_REGION_LEN, DMX3191D_DRIVER_NAME)) {
  80                 printk(KERN_ERR "dmx3191: region 0x%lx-0x%lx already reserved\n",
  81                                 io, io + DMX3191D_REGION_LEN);
  82                 goto out_disable_device;
  83         }
  84
  85         shost = scsi_host_alloc(&dmx3191d_driver_template,
  86                         sizeof(struct NCR5380_hostdata));
  87         if (!shost)
  88                 goto out_release_region;
  89         shost->io_port = io;
  90
  91         /* This card does not seem to raise an interrupt on pdev->irq.
  92          * Steam-powered SCSI controllers run without an IRQ anyway.
  93          */
  94         shost->irq = NO_IRQ;
  95
  96         error = NCR5380_init(shost, FLAG_NO_PSEUDO_DMA);
  97         if (error)
  98                 goto out_host_put;
  99
 100         NCR5380_maybe_reset_bus(shost);
 101
 102         pci_set_drvdata(pdev, shost);
 103
 104         error = scsi_add_host(shost, &pdev->dev);
 105         if (error)
 106                 goto out_exit;
 107
 108         scsi_scan_host(shost);
 109         return 0;
 110
 111 out_exit:
 112         NCR5380_exit(shost);
 113 out_host_put:
 114         scsi_host_put(shost);
 115  out_release_region:
 116         release_region(io, DMX3191D_REGION_LEN);
 117  out_disable_device:
 118         pci_disable_device(pdev);
 119  out:
 120         return error;
 121 }
 122
 123 static void dmx3191d_remove_one(struct pci_dev *pdev)
 124 {
 125         struct Scsi_Host *shost = pci_get_drvdata(pdev);
 126         unsigned long io = shost->io_port;
 127
 128         scsi_remove_host(shost);
 129
 130         NCR5380_exit(shost);
 131         scsi_host_put(shost);
 132         release_region(io, DMX3191D_REGION_LEN);
 133         pci_disable_device(pdev);
 134 }
 135
 136 static struct pci_device_id dmx3191d_pci_tbl[] = {
 137         {PCI_VENDOR_ID_DOMEX, PCI_DEVICE_ID_DOMEX_DMX3191D,
 138                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
 139         { }
 140 };
 141 MODULE_DEVICE_TABLE(pci, dmx3191d_pci_tbl);
 142
 143 static struct pci_driver dmx3191d_pci_driver = {
 144         .name           = DMX3191D_DRIVER_NAME,
 145         .id_table       = dmx3191d_pci_tbl,
 146         .probe          = dmx3191d_probe_one,
 147         .remove         = dmx3191d_remove_one,
 148 };
 149
 150 static int __init dmx3191d_init(void)
 151 {
 152         return pci_register_driver(&dmx3191d_pci_driver);
 153 }
 154
 155 static void __exit dmx3191d_exit(void)
 156 {
 157         pci_unregister_driver(&dmx3191d_pci_driver);
 158 }
 159
 160 module_init(dmx3191d_init);
 161 module_exit(dmx3191d_exit);
 162
 163 MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
 164 MODULE_DESCRIPTION("Domex DMX3191D SCSI driver");
 165 MODULE_LICENSE("GPL");