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 NCR5380_read(reg)               inb(instance->io_port + reg)
  38#define NCR5380_write(reg, value)       outb(value, instance->io_port + reg)
  39
  40#define NCR5380_dma_xfer_len(instance, cmd, phase)      (0)
  41#define NCR5380_dma_recv_setup(instance, dst, len)      (0)
  42#define NCR5380_dma_send_setup(instance, src, len)      (0)
  43#define NCR5380_dma_residual(instance)                  (0)
  44
  45#define NCR5380_implementation_fields   /* none */
  46
  47#include "NCR5380.h"
  48#include "NCR5380.c"
  49
  50#define DMX3191D_DRIVER_NAME    "dmx3191d"
  51#define DMX3191D_REGION_LEN     8
  52
  53
  54static struct scsi_host_template dmx3191d_driver_template = {
  55        .module                 = THIS_MODULE,
  56        .proc_name              = DMX3191D_DRIVER_NAME,
  57        .name                   = "Domex DMX3191D",
  58        .info                   = NCR5380_info,
  59        .queuecommand           = NCR5380_queue_command,
  60        .eh_abort_handler       = NCR5380_abort,
  61        .eh_bus_reset_handler   = NCR5380_bus_reset,
  62        .can_queue              = 32,
  63        .this_id                = 7,
  64        .sg_tablesize           = SG_ALL,
  65        .cmd_per_lun            = 2,
  66        .use_clustering         = DISABLE_CLUSTERING,
  67        .cmd_size               = NCR5380_CMD_SIZE,
  68};
  69
  70static int dmx3191d_probe_one(struct pci_dev *pdev,
  71                              const struct pci_device_id *id)
  72{
  73        struct Scsi_Host *shost;
  74        unsigned long io;
  75        int error = -ENODEV;
  76
  77        if (pci_enable_device(pdev))
  78                goto out;
  79
  80        io = pci_resource_start(pdev, 0);
  81        if (!request_region(io, DMX3191D_REGION_LEN, DMX3191D_DRIVER_NAME)) {
  82                printk(KERN_ERR "dmx3191: region 0x%lx-0x%lx already reserved\n",
  83                                io, io + DMX3191D_REGION_LEN);
  84                goto out_disable_device;
  85        }
  86
  87        shost = scsi_host_alloc(&dmx3191d_driver_template,
  88                        sizeof(struct NCR5380_hostdata));
  89        if (!shost)
  90                goto out_release_region;       
  91        shost->io_port = io;
  92
  93        /* This card does not seem to raise an interrupt on pdev->irq.
  94         * Steam-powered SCSI controllers run without an IRQ anyway.
  95         */
  96        shost->irq = NO_IRQ;
  97
  98        error = NCR5380_init(shost, 0);
  99        if (error)
 100                goto out_host_put;
 101
 102        NCR5380_maybe_reset_bus(shost);
 103
 104        pci_set_drvdata(pdev, shost);
 105
 106        error = scsi_add_host(shost, &pdev->dev);
 107        if (error)
 108                goto out_exit;
 109
 110        scsi_scan_host(shost);
 111        return 0;
 112
 113out_exit:
 114        NCR5380_exit(shost);
 115out_host_put:
 116        scsi_host_put(shost);
 117 out_release_region:
 118        release_region(io, DMX3191D_REGION_LEN);
 119 out_disable_device:
 120        pci_disable_device(pdev);
 121 out:
 122        return error;
 123}
 124
 125static void dmx3191d_remove_one(struct pci_dev *pdev)
 126{
 127        struct Scsi_Host *shost = pci_get_drvdata(pdev);
 128        unsigned long io = shost->io_port;
 129
 130        scsi_remove_host(shost);
 131
 132        NCR5380_exit(shost);
 133        scsi_host_put(shost);
 134        release_region(io, DMX3191D_REGION_LEN);
 135        pci_disable_device(pdev);
 136}
 137
 138static struct pci_device_id dmx3191d_pci_tbl[] = {
 139        {PCI_VENDOR_ID_DOMEX, PCI_DEVICE_ID_DOMEX_DMX3191D,
 140                PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
 141        { }
 142};
 143MODULE_DEVICE_TABLE(pci, dmx3191d_pci_tbl);
 144
 145static struct pci_driver dmx3191d_pci_driver = {
 146        .name           = DMX3191D_DRIVER_NAME,
 147        .id_table       = dmx3191d_pci_tbl,
 148        .probe          = dmx3191d_probe_one,
 149        .remove         = dmx3191d_remove_one,
 150};
 151
 152static int __init dmx3191d_init(void)
 153{
 154        return pci_register_driver(&dmx3191d_pci_driver);
 155}
 156
 157static void __exit dmx3191d_exit(void)
 158{
 159        pci_unregister_driver(&dmx3191d_pci_driver);
 160}
 161
 162module_init(dmx3191d_init);
 163module_exit(dmx3191d_exit);
 164
 165MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
 166MODULE_DESCRIPTION("Domex DMX3191D SCSI driver");
 167MODULE_LICENSE("GPL");
 168