/*

   *  Created 20 Oct 2004 by Mark Lord
   *
   *  Basic support for Delkin/ASKA/Workbit Cardbus CompactFlash adapter
   *
   *  Modeled after the 16-bit PCMCIA driver: ide-cs.c
   *
   *  This is slightly peculiar, in that it is a PCI driver,
   *  but is NOT an IDE PCI driver -- the IDE layer does not directly
   *  support hot insertion/removal of PCI interfaces, so this driver
   *  is unable to use the IDE PCI interfaces.  Instead, it uses the
   *  same interfaces as the ide-cs (PCMCIA) driver uses.
   *  On the plus side, the driver is also smaller/simpler this way.
   *
   *  This file is subject to the terms and conditions of the GNU General Public
   *  License.  See the file COPYING in the main directory of this archive for
   *  more details.
   */

  #include <linux/types.h>
  #include <linux/module.h>

  #include <linux/ide.h>
  #include <linux/init.h>
  #include <linux/pci.h>

  #include <asm/io.h>
  
  /*
   * No chip documentation has yet been found,
   * so these configuration values were pulled from
   * a running Win98 system using "debug".
   * This gives around 3MByte/second read performance,
   * which is about 2/3 of what the chip is capable of.
   *
   * There is also a 4KByte mmio region on the card,
   * but its purpose has yet to be reverse-engineered.
   */
  static const u8 setup[] = {
  	0x00, 0x05, 0xbe, 0x01, 0x20, 0x8f, 0x00, 0x00,
  	0xa4, 0x1f, 0xb3, 0x1b, 0x00, 0x00, 0x00, 0x80,
  	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  	0x00, 0x00, 0x00, 0x00, 0xa4, 0x83, 0x02, 0x13,
  };

  static const struct ide_port_ops delkin_cb_port_ops = {
  	.quirkproc		= ide_undecoded_slave,
  };

  static int delkin_cb_init_chipset(struct pci_dev *dev)

  {
  	unsigned long base = pci_resource_start(dev, 0);
  	int i;
  
  	outb(0x02, base + 0x1e);	/* set nIEN to block interrupts */
  	inb(base + 0x17);		/* read status to clear interrupts */
  
  	for (i = 0; i < sizeof(setup); ++i) {
  		if (setup[i])
  			outb(setup[i], base + i);
  	}
  
  	return 0;
  }

  static const struct ide_port_info delkin_cb_port_info = {
  	.port_ops		= &delkin_cb_port_ops,
  	.host_flags		= IDE_HFLAG_IO_32BIT | IDE_HFLAG_UNMASK_IRQS |
  				  IDE_HFLAG_NO_DMA,

  	.irq_flags		= IRQF_SHARED,

  	.init_chipset		= delkin_cb_init_chipset,

  	.chipset		= ide_pci,

  };

  static int delkin_cb_probe(struct pci_dev *dev, const struct pci_device_id *id)

  {

  	struct ide_host *host;

  	unsigned long base;

  	int rc;

  	struct ide_hw hw, *hws[] = { &hw };

  
  	rc = pci_enable_device(dev);
  	if (rc) {
  		printk(KERN_ERR "delkin_cb: pci_enable_device failed (%d)
  ", rc);
  		return rc;
  	}
  	rc = pci_request_regions(dev, "delkin_cb");
  	if (rc) {
  		printk(KERN_ERR "delkin_cb: pci_request_regions failed (%d)
  ", rc);
  		pci_disable_device(dev);
  		return rc;
  	}
  	base = pci_resource_start(dev, 0);

  
  	delkin_cb_init_chipset(dev);

  
  	memset(&hw, 0, sizeof(hw));
  	ide_std_init_ports(&hw, base + 0x10, base + 0x1e);
  	hw.irq = dev->irq;

  	hw.dev = &dev->dev;

  	rc = ide_host_add(&delkin_cb_port_info, hws, 1, &host);

  	if (rc)

  		goto out_disable;

  	pci_set_drvdata(dev, host);

  	return 0;

  
  out_disable:

  	pci_release_regions(dev);

  	pci_disable_device(dev);

  	return rc;

  }
  
  static void
  delkin_cb_remove (struct pci_dev *dev)
  {

  	struct ide_host *host = pci_get_drvdata(dev);

  	ide_host_remove(host);

  	pci_release_regions(dev);

  	pci_disable_device(dev);
  }

  #ifdef CONFIG_PM
  static int delkin_cb_suspend(struct pci_dev *dev, pm_message_t state)
  {
  	pci_save_state(dev);
  	pci_disable_device(dev);
  	pci_set_power_state(dev, pci_choose_state(dev, state));
  
  	return 0;
  }
  
  static int delkin_cb_resume(struct pci_dev *dev)
  {
  	struct ide_host *host = pci_get_drvdata(dev);
  	int rc;
  
  	pci_set_power_state(dev, PCI_D0);
  
  	rc = pci_enable_device(dev);
  	if (rc)
  		return rc;
  
  	pci_restore_state(dev);
  	pci_set_master(dev);
  
  	if (host->init_chipset)
  		host->init_chipset(dev);
  
  	return 0;
  }
  #else
  #define delkin_cb_suspend NULL
  #define delkin_cb_resume NULL
  #endif

  static struct pci_device_id delkin_cb_pci_tbl[] = {

  	{ 0x1145, 0xf021, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},

  	{ 0x1145, 0xf024, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},

  	{ 0, },
  };
  MODULE_DEVICE_TABLE(pci, delkin_cb_pci_tbl);

  static struct pci_driver delkin_cb_pci_driver = {

  	.name		= "Delkin-ASKA-Workbit Cardbus IDE",
  	.id_table	= delkin_cb_pci_tbl,
  	.probe		= delkin_cb_probe,
  	.remove		= delkin_cb_remove,

  	.suspend	= delkin_cb_suspend,
  	.resume		= delkin_cb_resume,

  };

  module_pci_driver(delkin_cb_pci_driver);

  
  MODULE_AUTHOR("Mark Lord");
  MODULE_DESCRIPTION("Basic support for Delkin/ASKA/Workbit Cardbus IDE");
  MODULE_LICENSE("GPL");