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(port + reg)
  40 #define NCR5380_write(reg, value)       outb(value, port + reg)
  41
  42 #define NCR5380_implementation_fields   /* none */
  43 #define NCR5380_local_declare()         unsigned int port
  44 #define NCR5380_setup(instance)         port = instance->io_port
  45
  46 /*
  47  * Includes needed for NCR5380.[ch] (XXX: Move them to NCR5380.h)
  48  */
  49 #include <linux/delay.h>
  50
  51 #include "NCR5380.h"
  52 #include "NCR5380.c"
  53
  54 #define DMX3191D_DRIVER_NAME    "dmx3191d"
  55 #define DMX3191D_REGION_LEN     8
  56
  57
  58 static struct scsi_host_template dmx3191d_driver_template = {
  59         .proc_name              = DMX3191D_DRIVER_NAME,
  60         .name                   = "Domex DMX3191D",
  61         .info                   = NCR5380_info,
  62         .queuecommand           = NCR5380_queue_command,
  63         .eh_abort_handler       = NCR5380_abort,
  64         .eh_bus_reset_handler   = NCR5380_bus_reset,
  65         .can_queue              = 32,
  66         .this_id                = 7,
  67         .sg_tablesize           = SG_ALL,
  68         .cmd_per_lun            = 2,
  69         .use_clustering         = DISABLE_CLUSTERING,
  70 };
  71
  72 static int dmx3191d_probe_one(struct pci_dev *pdev,
  73                               const struct pci_device_id *id)
  74 {
  75         struct Scsi_Host *shost;
  76         unsigned long io;
  77         int error = -ENODEV;
  78
  79         if (pci_enable_device(pdev))
  80                 goto out;
  81
  82         io = pci_resource_start(pdev, 0);
  83         if (!request_region(io, DMX3191D_REGION_LEN, DMX3191D_DRIVER_NAME)) {
  84                 printk(KERN_ERR "dmx3191: region 0x%lx-0x%lx already reserved\n",
  85                                 io, io + DMX3191D_REGION_LEN);
  86                 goto out_disable_device;
  87         }
  88
  89         shost = scsi_host_alloc(&dmx3191d_driver_template,
  90                         sizeof(struct NCR5380_hostdata));
  91         if (!shost)
  92                 goto out_release_region;
  93         shost->io_port = io;
  94
  95         /* This card does not seem to raise an interrupt on pdev->irq.
  96          * Steam-powered SCSI controllers run without an IRQ anyway.
  97          */
  98         shost->irq = NO_IRQ;
  99
 100         NCR5380_init(shost, FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E);
 101
 102         pci_set_drvdata(pdev, shost);
 103
 104         error = scsi_add_host(shost, &pdev->dev);
 105         if (error)
 106                 goto out_release_region;
 107
 108         scsi_scan_host(shost);
 109         return 0;
 110
 111  out_release_region:
 112         release_region(io, DMX3191D_REGION_LEN);
 113  out_disable_device:
 114         pci_disable_device(pdev);
 115  out:
 116         return error;
 117 }
 118
 119 static void dmx3191d_remove_one(struct pci_dev *pdev)
 120 {
 121         struct Scsi_Host *shost = pci_get_drvdata(pdev);
 122
 123         scsi_remove_host(shost);
 124
 125         NCR5380_exit(shost);
 126
 127         release_region(shost->io_port, DMX3191D_REGION_LEN);
 128         pci_disable_device(pdev);
 129
 130         scsi_host_put(shost);
 131 }
 132
 133 static struct pci_device_id dmx3191d_pci_tbl[] = {
 134         {PCI_VENDOR_ID_DOMEX, PCI_DEVICE_ID_DOMEX_DMX3191D,
 135                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
 136         { }
 137 };
 138 MODULE_DEVICE_TABLE(pci, dmx3191d_pci_tbl);
 139
 140 static struct pci_driver dmx3191d_pci_driver = {
 141         .name           = DMX3191D_DRIVER_NAME,
 142         .id_table       = dmx3191d_pci_tbl,
 143         .probe          = dmx3191d_probe_one,
 144         .remove         = dmx3191d_remove_one,
 145 };
 146
 147 static int __init dmx3191d_init(void)
 148 {
 149         return pci_register_driver(&dmx3191d_pci_driver);
 150 }
 151
 152 static void __exit dmx3191d_exit(void)
 153 {
 154         pci_unregister_driver(&dmx3191d_pci_driver);
 155 }
 156
 157 module_init(dmx3191d_init);
 158 module_exit(dmx3191d_exit);
 159
 160 MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
 161 MODULE_DESCRIPTION("Domex DMX3191D SCSI driver");
 162 MODULE_LICENSE("GPL");