LXR linux/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
  51static 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
  68static 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
 111out_exit:
 112        NCR5380_exit(shost);
 113out_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
 123static 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
 136static 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};
 141MODULE_DEVICE_TABLE(pci, dmx3191d_pci_tbl);
 142
 143static 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
 150static int __init dmx3191d_init(void)
 151{
 152        return pci_register_driver(&dmx3191d_pci_driver);
 153}
 154
 155static void __exit dmx3191d_exit(void)
 156{
 157        pci_unregister_driver(&dmx3191d_pci_driver);
 158}
 159
 160module_init(dmx3191d_init);
 161module_exit(dmx3191d_exit);
 162
 163MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
 164MODULE_DESCRIPTION("Domex DMX3191D SCSI driver");
 165MODULE_LICENSE("GPL");
 166