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

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