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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(port + reg)
 40 #define NCR5380_write(reg, value)       outb(value, port + reg)
 41 
 42 #define NCR5380_implementation_fields   /* none */
 43 #define NCR5380_local_declare()         unsigned int port
 44 #define NCR5380_setup(instance)         port = instance->io_port
 45 
 46 /*
 47  * Includes needed for NCR5380.[ch] (XXX: Move them to NCR5380.h)
 48  */
 49 #include <linux/delay.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         .info                   = NCR5380_info,
 62         .queuecommand           = NCR5380_queue_command,
 63         .eh_abort_handler       = NCR5380_abort,
 64         .eh_bus_reset_handler   = NCR5380_bus_reset,
 65         .can_queue              = 32,
 66         .this_id                = 7,
 67         .sg_tablesize           = SG_ALL,
 68         .cmd_per_lun            = 2,
 69         .use_clustering         = DISABLE_CLUSTERING,
 70 };
 71 
 72 static int dmx3191d_probe_one(struct pci_dev *pdev,
 73                               const struct pci_device_id *id)
 74 {
 75         struct Scsi_Host *shost;
 76         unsigned long io;
 77         int error = -ENODEV;
 78 
 79         if (pci_enable_device(pdev))
 80                 goto out;
 81 
 82         io = pci_resource_start(pdev, 0);
 83         if (!request_region(io, DMX3191D_REGION_LEN, DMX3191D_DRIVER_NAME)) {
 84                 printk(KERN_ERR "dmx3191: region 0x%lx-0x%lx already reserved\n",
 85                                 io, io + DMX3191D_REGION_LEN);
 86                 goto out_disable_device;
 87         }
 88 
 89         shost = scsi_host_alloc(&dmx3191d_driver_template,
 90                         sizeof(struct NCR5380_hostdata));
 91         if (!shost)
 92                 goto out_release_region;       
 93         shost->io_port = io;
 94 
 95         /* This card does not seem to raise an interrupt on pdev->irq.
 96          * Steam-powered SCSI controllers run without an IRQ anyway.
 97          */
 98         shost->irq = NO_IRQ;
 99 
100         NCR5380_init(shost, FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E);
101 
102         pci_set_drvdata(pdev, shost);
103 
104         error = scsi_add_host(shost, &pdev->dev);
105         if (error)
106                 goto out_release_region;
107 
108         scsi_scan_host(shost);
109         return 0;
110 
111  out_release_region:
112         release_region(io, DMX3191D_REGION_LEN);
113  out_disable_device:
114         pci_disable_device(pdev);
115  out:
116         return error;
117 }
118 
119 static void dmx3191d_remove_one(struct pci_dev *pdev)
120 {
121         struct Scsi_Host *shost = pci_get_drvdata(pdev);
122 
123         scsi_remove_host(shost);
124 
125         NCR5380_exit(shost);
126 
127         release_region(shost->io_port, DMX3191D_REGION_LEN);
128         pci_disable_device(pdev);
129 
130         scsi_host_put(shost);
131 }
132 
133 static struct pci_device_id dmx3191d_pci_tbl[] = {
134         {PCI_VENDOR_ID_DOMEX, PCI_DEVICE_ID_DOMEX_DMX3191D,
135                 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
136         { }
137 };
138 MODULE_DEVICE_TABLE(pci, dmx3191d_pci_tbl);
139 
140 static struct pci_driver dmx3191d_pci_driver = {
141         .name           = DMX3191D_DRIVER_NAME,
142         .id_table       = dmx3191d_pci_tbl,
143         .probe          = dmx3191d_probe_one,
144         .remove         = dmx3191d_remove_one,
145 };
146 
147 static int __init dmx3191d_init(void)
148 {
149         return pci_register_driver(&dmx3191d_pci_driver);
150 }
151 
152 static void __exit dmx3191d_exit(void)
153 {
154         pci_unregister_driver(&dmx3191d_pci_driver);
155 }
156 
157 module_init(dmx3191d_init);
158 module_exit(dmx3191d_exit);
159 
160 MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
161 MODULE_DESCRIPTION("Domex DMX3191D SCSI driver");
162 MODULE_LICENSE("GPL");
163 

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