/*
      dmx3191d.c - driver for the Domex DMX3191D SCSI card.
      Copyright (C) 2000 by Massimo Piccioni <dafastidio@libero.it>
      Portions Copyright (C) 2004 by Christoph Hellwig <hch@lst.de>
  
      Based on the generic NCR5380 driver by Drew Eckhardt et al.
  
      This program is free software; you can redistribute it and/or modify
      it under the terms of the GNU General Public License as published by
      the Free Software Foundation; either version 2 of the License, or
      (at your option) any later version.
  
      This program is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      GNU General Public License for more details.
  
      You should have received a copy of the GNU General Public License
      along with this program; if not, write to the Free Software
      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
  
  #include <linux/init.h>
  #include <linux/ioport.h>
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/pci.h>
  #include <linux/interrupt.h>
  #include <asm/io.h>
  
  #include <scsi/scsi_host.h>
  
  /*
   * Defintions for the generic 5380 driver.
   */
  #define AUTOSENSE
  
  #define NCR5380_read(reg)		inb(port + reg)
  #define NCR5380_write(reg, value)	outb(value, port + reg)
  
  #define NCR5380_implementation_fields	unsigned int port
  #define NCR5380_local_declare()		NCR5380_implementation_fields
  #define NCR5380_setup(instance)		port = instance->io_port
  
  /*
   * Includes needed for NCR5380.[ch] (XXX: Move them to NCR5380.h)
   */
  #include <linux/delay.h>
  #include "scsi.h"
  
  #include "NCR5380.h"
  #include "NCR5380.c"
  
  #define DMX3191D_DRIVER_NAME	"dmx3191d"
  #define DMX3191D_REGION_LEN	8
  
  
  static struct scsi_host_template dmx3191d_driver_template = {
  	.proc_name		= DMX3191D_DRIVER_NAME,
  	.name			= "Domex DMX3191D",
  	.queuecommand		= NCR5380_queue_command,
  	.eh_abort_handler	= NCR5380_abort,
  	.eh_bus_reset_handler	= NCR5380_bus_reset,

  	.can_queue		= 32,
  	.this_id		= 7,
  	.sg_tablesize		= SG_ALL,
  	.cmd_per_lun		= 2,
  	.use_clustering		= DISABLE_CLUSTERING,
  };
  
  static int __devinit dmx3191d_probe_one(struct pci_dev *pdev,
  		const struct pci_device_id *id)
  {
  	struct Scsi_Host *shost;
  	unsigned long io;
  	int error = -ENODEV;
  
  	if (pci_enable_device(pdev))
  		goto out;
  
  	io = pci_resource_start(pdev, 0);
  	if (!request_region(io, DMX3191D_REGION_LEN, DMX3191D_DRIVER_NAME)) {
  		printk(KERN_ERR "dmx3191: region 0x%lx-0x%lx already reserved
  ",
  				io, io + DMX3191D_REGION_LEN);
  		goto out_disable_device;
  	}
  
  	shost = scsi_host_alloc(&dmx3191d_driver_template,
  			sizeof(struct NCR5380_hostdata));
  	if (!shost)
  		goto out_release_region;       
  	shost->io_port = io;
  	shost->irq = pdev->irq;
  
  	NCR5380_init(shost, FLAG_NO_PSEUDO_DMA | FLAG_DTC3181E);

  	if (request_irq(pdev->irq, NCR5380_intr, IRQF_SHARED,

  				DMX3191D_DRIVER_NAME, shost)) {
  		/*
  		 * Steam powered scsi controllers run without an IRQ anyway
  		 */
  		printk(KERN_WARNING "dmx3191: IRQ %d not available - "
  				    "switching to polled mode.
  ", pdev->irq);
  		shost->irq = SCSI_IRQ_NONE;
  	}
  
  	pci_set_drvdata(pdev, shost);
  
  	error = scsi_add_host(shost, &pdev->dev);
  	if (error)
  		goto out_free_irq;
  
  	scsi_scan_host(shost);
  	return 0;
  
   out_free_irq:
  	free_irq(shost->irq, shost);
   out_release_region:

  	release_region(io, DMX3191D_REGION_LEN);

   out_disable_device:
  	pci_disable_device(pdev);
   out:
  	return error;
  }
  
  static void __devexit dmx3191d_remove_one(struct pci_dev *pdev)
  {
  	struct Scsi_Host *shost = pci_get_drvdata(pdev);
  
  	scsi_remove_host(shost);
  
  	NCR5380_exit(shost);
  
  	if (shost->irq != SCSI_IRQ_NONE)
  		free_irq(shost->irq, shost);
  	release_region(shost->io_port, DMX3191D_REGION_LEN);
  	pci_disable_device(pdev);
  
  	scsi_host_put(shost);
  }
  
  static struct pci_device_id dmx3191d_pci_tbl[] = {
  	{PCI_VENDOR_ID_DOMEX, PCI_DEVICE_ID_DOMEX_DMX3191D,
  		PCI_ANY_ID, PCI_ANY_ID, 0, 0, 4},
  	{ }
  };
  MODULE_DEVICE_TABLE(pci, dmx3191d_pci_tbl);
  
  static struct pci_driver dmx3191d_pci_driver = {
  	.name		= DMX3191D_DRIVER_NAME,
  	.id_table	= dmx3191d_pci_tbl,
  	.probe		= dmx3191d_probe_one,
  	.remove		= __devexit_p(dmx3191d_remove_one),
  };
  
  static int __init dmx3191d_init(void)
  {

  	return pci_register_driver(&dmx3191d_pci_driver);

  }
  
  static void __exit dmx3191d_exit(void)
  {
  	pci_unregister_driver(&dmx3191d_pci_driver);
  }
  
  module_init(dmx3191d_init);
  module_exit(dmx3191d_exit);
  
  MODULE_AUTHOR("Massimo Piccioni <dafastidio@libero.it>");
  MODULE_DESCRIPTION("Domex DMX3191D SCSI driver");
  MODULE_LICENSE("GPL");