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  * Defintions 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
  58 static 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         .eh_device_reset_handler= NCR5380_device_reset,
  65         .eh_host_reset_handler  = NCR5380_host_reset,
  66         .can_queue              = 32,
  67         .this_id                = 7,
  68         .sg_tablesize           = SG_ALL,
  69         .cmd_per_lun            = 2,
  70         .use_clustering         = DISABLE_CLUSTERING,
  71 };
  72
  73 static int __devinit dmx3191d_probe_one(struct pci_dev *pdev,
  74                 const struct pci_device_id *id)
  75 {
  76         struct Scsi_Host *shost;
  77         unsigned long io;
  78         int error = -ENODEV;
  79
  80         if (pci_enable_device(pdev))
  81                 goto out;
  82
  83         io = pci_resource_start(pdev, 0);
  84         if (!request_region(io, DMX3191D_REGION_LEN, DMX3191D_DRIVER_NAME)) {
  85                 printk(KERN_ERR "dmx3191: region 0x%lx-0x%lx already reserved\n",
  86                                 io, io + DMX3191D_REGION_LEN);
  87                 goto out_disable_device;
  88         }
  89
  90         shost = scsi_host_alloc(&dmx3191d_driver_template,
  91                         sizeof(struct NCR5380_hostdata));
  92         if (!shost)
  93                 goto out_release_region;
  94         shost->io_port = io;
  95         shost->irq = pdev->irq;
  96
  97         NCR5380_init(shost, FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E);
  98
  99         if (request_irq(pdev->irq, NCR5380_intr, SA_SHIRQ,
 100                                 DMX3191D_DRIVER_NAME, shost)) {
 101                 /*
 102                  * Steam powered scsi controllers run without an IRQ anyway
 103                  */
 104                 printk(KERN_WARNING "dmx3191: IRQ %d not available - "
 105                                     "switching to polled mode.\n", pdev->irq);
 106                 shost->irq = SCSI_IRQ_NONE;
 107         }
 108
 109         pci_set_drvdata(pdev, shost);
 110
 111         error = scsi_add_host(shost, &pdev->dev);
 112         if (error)
 113                 goto out_free_irq;
 114
 115         scsi_scan_host(shost);
 116         return 0;
 117
 118  out_free_irq:
 119         free_irq(shost->irq, shost);
 120  out_release_region:
 121         release_region(shost->io_port, DMX3191D_REGION_LEN);
 122  out_disable_device:
 123         pci_disable_device(pdev);
 124  out:
 125         return error;
 126 }
 127
 128 static void __devexit dmx3191d_remove_one(struct pci_dev *pdev)
 129 {
 130         struct Scsi_Host *shost = pci_get_drvdata(pdev);
 131
 132         scsi_remove_host(shost);
 133
 134         NCR5380_exit(shost);
 135
 136         if (shost->irq != SCSI_IRQ_NONE)
 137                 free_irq(shost->irq, shost);
 138         release_region(shost->io_port, DMX3191D_REGION_LEN);
 139         pci_disable_device(pdev);
 140
 141         scsi_host_put(shost);
 142 }
 143
 144 static struct pci_device_id dmx3191d_pci_tbl[] = {
 145         {PCI_VENDOR_ID_DOMEX, PCI_DEVICE_ID_DOMEX_DMX3191D,
 146                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
 147         { }
 148 };
 149 MODULE_DEVICE_TABLE(pci, dmx3191d_pci_tbl);
 150
 151 static struct pci_driver dmx3191d_pci_driver = {
 152         .name           = DMX3191D_DRIVER_NAME,
 153         .id_table       = dmx3191d_pci_tbl,
 154         .probe          = dmx3191d_probe_one,
 155         .remove         = __devexit_p(dmx3191d_remove_one),
 156 };
 157
 158 static int __init dmx3191d_init(void)
 159 {
 160         return pci_module_init(&dmx3191d_pci_driver);
 161 }
 162
 163 static void __exit dmx3191d_exit(void)
 164 {
 165         pci_unregister_driver(&dmx3191d_pci_driver);
 166 }
 167
 168 module_init(dmx3191d_init);
 169 module_exit(dmx3191d_exit);
 170
 171 MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
 172 MODULE_DESCRIPTION("Domex DMX3191D SCSI driver");
 173 MODULE_LICENSE("GPL");