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#define AUTOSENSE
  37
  38#define NCR5380_read(reg)               inb(port + reg)
  39#define NCR5380_write(reg, value)       outb(value, port + reg)
  40
  41#define NCR5380_implementation_fields   unsigned int port
  42#define NCR5380_local_declare()         NCR5380_implementation_fields
  43#define NCR5380_setup(instance)         port = instance->io_port
  44
  45/*
  46 * Includes needed for NCR5380.[ch] (XXX: Move them to NCR5380.h)
  47 */
  48#include <linux/delay.h>
  49#include "scsi.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
  58static struct scsi_host_template dmx3191d_driver_template = {
  59        .proc_name              = DMX3191D_DRIVER_NAME,
  60        .name                   = "Domex DMX3191D",
  61        .queuecommand           = NCR5380_queue_command,
  62        .eh_abort_handler       = NCR5380_abort,
  63        .eh_bus_reset_handler   = NCR5380_bus_reset,
  64        .can_queue              = 32,
  65        .this_id                = 7,
  66        .sg_tablesize           = SG_ALL,
  67        .cmd_per_lun            = 2,
  68        .use_clustering         = DISABLE_CLUSTERING,
  69};
  70
  71static int dmx3191d_probe_one(struct pci_dev *pdev,
  72                              const struct pci_device_id *id)
  73{
  74        struct Scsi_Host *shost;
  75        unsigned long io;
  76        int error = -ENODEV;
  77
  78        if (pci_enable_device(pdev))
  79                goto out;
  80
  81        io = pci_resource_start(pdev, 0);
  82        if (!request_region(io, DMX3191D_REGION_LEN, DMX3191D_DRIVER_NAME)) {
  83                printk(KERN_ERR "dmx3191: region 0x%lx-0x%lx already reserved\n",
  84                                io, io + DMX3191D_REGION_LEN);
  85                goto out_disable_device;
  86        }
  87
  88        shost = scsi_host_alloc(&dmx3191d_driver_template,
  89                        sizeof(struct NCR5380_hostdata));
  90        if (!shost)
  91                goto out_release_region;       
  92        shost->io_port = io;
  93        shost->irq = pdev->irq;
  94
  95        NCR5380_init(shost, FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E);
  96
  97        if (request_irq(pdev->irq, NCR5380_intr, IRQF_SHARED,
  98                                DMX3191D_DRIVER_NAME, shost)) {
  99                /*
 100                 * Steam powered scsi controllers run without an IRQ anyway
 101                 */
 102                printk(KERN_WARNING "dmx3191: IRQ %d not available - "
 103                                    "switching to polled mode.\n", pdev->irq);
 104                shost->irq = SCSI_IRQ_NONE;
 105        }
 106
 107        pci_set_drvdata(pdev, shost);
 108
 109        error = scsi_add_host(shost, &pdev->dev);
 110        if (error)
 111                goto out_free_irq;
 112
 113        scsi_scan_host(shost);
 114        return 0;
 115
 116 out_free_irq:
 117        free_irq(shost->irq, shost);
 118 out_release_region:
 119        release_region(io, DMX3191D_REGION_LEN);
 120 out_disable_device:
 121        pci_disable_device(pdev);
 122 out:
 123        return error;
 124}
 125
 126static void dmx3191d_remove_one(struct pci_dev *pdev)
 127{
 128        struct Scsi_Host *shost = pci_get_drvdata(pdev);
 129
 130        scsi_remove_host(shost);
 131
 132        NCR5380_exit(shost);
 133
 134        if (shost->irq != SCSI_IRQ_NONE)
 135                free_irq(shost->irq, shost);
 136        release_region(shost->io_port, DMX3191D_REGION_LEN);
 137        pci_disable_device(pdev);
 138
 139        scsi_host_put(shost);
 140}
 141
 142static struct pci_device_id dmx3191d_pci_tbl[] = {
 143        {PCI_VENDOR_ID_DOMEX, PCI_DEVICE_ID_DOMEX_DMX3191D,
 144                PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
 145        { }
 146};
 147MODULE_DEVICE_TABLE(pci, dmx3191d_pci_tbl);
 148
 149static struct pci_driver dmx3191d_pci_driver = {
 150        .name           = DMX3191D_DRIVER_NAME,
 151        .id_table       = dmx3191d_pci_tbl,
 152        .probe          = dmx3191d_probe_one,
 153        .remove         = dmx3191d_remove_one,
 154};
 155
 156static int __init dmx3191d_init(void)
 157{
 158        return pci_register_driver(&dmx3191d_pci_driver);
 159}
 160
 161static void __exit dmx3191d_exit(void)
 162{
 163        pci_unregister_driver(&dmx3191d_pci_driver);
 164}
 165
 166module_init(dmx3191d_init);
 167module_exit(dmx3191d_exit);
 168
 169MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
 170MODULE_DESCRIPTION("Domex DMX3191D SCSI driver");
 171MODULE_LICENSE("GPL");
 172