/*
 *  linux/drivers/ide/pci/delkin_cb.c
 *
 *  Created 25 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/config.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/blkdev.h>
#include <linux/hdreg.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 int __devinit
delkin_cb_probe (struct pci_dev *dev, const struct pci_device_id *id)
{
	unsigned long base;
	hw_regs_t hw;
	ide_hwif_t *hwif = NULL;
	ide_drive_t *drive;
	int i, rc;

	rc = pci_enable_device(dev);
	if (rc) {
		printk(KERN_ERR "delkin_cb: pci_enable_device failed (%d)\n", rc);
		return rc;
	}
	rc = pci_request_regions(dev, "delkin_cb");
	if (rc) {
		printk(KERN_ERR "delkin_cb: pci_request_regions failed (%d)\n", rc);
		pci_disable_device(dev);
		return rc;
	}
	base = pci_resource_start(dev, 0);
	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);
	}
	pci_release_regions(dev);	/* IDE layer handles regions itself */

	memset(&hw, 0, sizeof(hw));
	ide_init_hwif_ports(&hw, (ide_ioreg_t)(base + 0x10),
				 (ide_ioreg_t)(base + 0x1e), NULL);
	hw.irq = dev->irq;
	hw.chipset = ide_pci;		/* this enables IRQ sharing */

	rc = ide_register_hw(&hw, &hwif);
	if (rc < 0)	/* ide_register_hw likes to be invoked twice (buggy) */
		rc = ide_register_hw(&hw, &hwif);
	if (rc < 0) {
		printk(KERN_ERR "delkin_cb: ide_register_hw failed (%d)\n", rc);
		pci_disable_device(dev);
		return -ENODEV;
	}
	MOD_INC_USE_COUNT;
	pci_set_drvdata(dev, hwif);
	hwif->pci_dev = dev;
	drive = &hwif->drives[0];
	if (drive->present) {
		drive->id->csfo = 0; /* workaround for idedisk_open bug */
		drive->io_32bit = 1;
		drive->unmask   = 1;
	}
	return 0;
}

static void
delkin_cb_remove (struct pci_dev *dev)
{
	ide_hwif_t *hwif = pci_get_drvdata(dev);

	if (hwif) {
		ide_unregister(hwif->index);
		MOD_DEC_USE_COUNT;
	}
	pci_disable_device(dev);
}

static struct pci_device_id delkin_cb_pci_tbl[] __devinitdata = {
	{ PCI_VENDOR_ID_WORKBIT, PCI_DEVICE_ID_WORKBIT_CB, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{ 0, },
};
MODULE_DEVICE_TABLE(pci, delkin_cb_pci_tbl);

static struct pci_driver driver = {
	.name		= "Delkin/ASKA/Workbit Cardbus IDE",
	.id_table	= delkin_cb_pci_tbl,
	.probe		= delkin_cb_probe,
	.remove		= delkin_cb_remove,
};

static int
delkin_cb_init (void)
{
	return pci_module_init(&driver);
}

static void
delkin_cb_exit (void)
{
	pci_unregister_driver(&driver);
}

module_init(delkin_cb_init);
module_exit(delkin_cb_exit);

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

EXPORT_NO_SYMBOLS;