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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 #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         .can_queue              = 32,
 65         .this_id                = 7,
 66         .sg_tablesize           = SG_ALL,
 67         .cmd_per_lun            = 2,
 68         .use_clustering         = DISABLE_CLUSTERING,
 69 };
 70 
 71 static 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 
126 static 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 
142 static 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 };
147 MODULE_DEVICE_TABLE(pci, dmx3191d_pci_tbl);
148 
149 static 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 
156 static int __init dmx3191d_init(void)
157 {
158         return pci_register_driver(&dmx3191d_pci_driver);
159 }
160 
161 static void __exit dmx3191d_exit(void)
162 {
163         pci_unregister_driver(&dmx3191d_pci_driver);
164 }
165 
166 module_init(dmx3191d_init);
167 module_exit(dmx3191d_exit);
168 
169 MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
170 MODULE_DESCRIPTION("Domex DMX3191D SCSI driver");
171 MODULE_LICENSE("GPL");
172 

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