/******************************************************************************
**
** FILE NAME    : ifxmips_pci_common.c
** PROJECT      : IFX UEIP
** MODULES      : PCI subsystem
**
** DATE         : 30 June 2009
** AUTHOR       : Lei Chuanhua
** DESCRIPTION  : PCIe Root Complex Driver
** COPYRIGHT    :       Copyright (c) 2009
**                      Infineon Technologies AG
**                      Am Campeon 1-12, 85579 Neubiberg, Germany
**
**    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.
** HISTORY
** $Version $Date        $Author         $Comment
** 0.0.1    30 Jun,2009  Lei Chuanhua    Initial version
*******************************************************************************/

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/time.h>
#include <linux/delay.h>

#include "ifxmips_pci_common.h"

/**
 * \fn int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
 * \brief Map a PCI device to the appropriate interrupt line
 *
 * \param dev    The Linux PCI device structure for the device to map
 * \param slot   The slot number for this device on __BUS 0__. Linux
 *               enumerates through all the bridges and figures out the
 *               slot on Bus 0 where this device eventually hooks to.
 * \param pin    The PCI interrupt pin read from the device, then swizzled
 *               as it goes through each bridge.
 * \return Interrupt number for the device
 * \ingroup IFX_PCI_COM_OS
 */
int __init pcibios_map_irq(IFX_PCI_CONST struct pci_dev *dev, u8 slot, u8 pin)
{
	int pos;
	struct pci_dev *pdev = (struct pci_dev *)dev;

	/* Check PCIe capability */
	pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
	if (pos <= 0) {		/* Normal PCI */
#ifdef CONFIG_IFX_PCI
		return ifx_pci_bios_map_irq(dev, slot, pin);
#else
		return 0;
#endif
	} else {		/* PCIe */
#ifdef CONFIG_IFX_PCIE
		return ifx_pcie_bios_map_irq(dev, slot, pin);
#else
		return 0;
#endif
	}
}

/**
 * \fn int pcibios_plat_dev_init(struct pci_dev *dev)
 * \brief Called to perform platform specific PCI setup
 *
 * \param dev The Linux PCI device structure for the device to map
 * \return  0 OK
 * \ingroup IFX_PCI_COM_OS
 */
int pcibios_plat_dev_init(struct pci_dev *dev)
{
	int pos;

	pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
	if (pos <= 0) {
#ifdef CONFIG_IFX_PCI
		ifx_pci_bios_plat_dev_init(dev);
#else
		return 0;
#endif
	} else {
#ifdef CONFIG_IFX_PCIE
		ifx_pcie_bios_plat_dev_init(dev);
#else
		return 0;
#endif
	}
	return 0;
}