pci_fixup.c

广州斯道2410普及版II的源代码

/*
 *
 * BRIEF MODULE DESCRIPTION
 *	Globespan IVR board-specific pci fixups.
 *
 * Copyright 2000 MontaVista Software Inc.
 * Author: MontaVista Software, Inc.
 *         	[e-mail] or [e-mail]
 *
 *  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  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  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/config.h>

#ifdef CONFIG_PCI

#include <linux/types.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/init.h>

#include <asm/it8172/it8172.h>
#include <asm/it8172/it8172_pci.h>
#include <asm/it8172/it8172_int.h>

void __init board_int_line_fixup(struct pci_dev *dev)     
{
	unsigned int slot, func;
	unsigned char pin;
        const int internal_func_irqs[7] = {
            IT8172_AC97_IRQ,
            IT8172_DMA_IRQ,
            IT8172_CDMA_IRQ,
            IT8172_USB_IRQ,
            IT8172_BRIDGE_MASTER_IRQ,
            IT8172_IDE_IRQ,
            IT8172_MC68K_IRQ
        };

#ifdef DEBUG
	printk("board_int_line_fixup bus %d\n", dev->bus->number);
#endif
	if (dev->bus->number != 0)
		return;

	pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);

#ifdef DEBUG
	pci_read_config_dword(dev, PCI_SUBSYSTEM_VENDOR_ID, &vendor);
#endif

	slot = PCI_SLOT(dev->devfn);
        func = PCI_FUNC(dev->devfn);

	switch (slot) {
                case 0x01:
                    /*
                     * Internal device 1 is actually 7 different internal
                     * devices on the IT8172G (a multi-function device).
                     */
                    if (func < 7)
                        dev->irq = internal_func_irqs[func];
                    break;
		case 0x11:
			switch (pin) {
				case 0: /* pin A, hardware bug */
				case 1: /* pin A */
					dev->irq = IT8172_PCI_INTC_IRQ;
					break;
				case 2: /* pin B */
					dev->irq = IT8172_PCI_INTD_IRQ;
					break;
				case 3: /* pin C */
					dev->irq = IT8172_PCI_INTA_IRQ;
					break;
				case 4: /* pin D */
					dev->irq = IT8172_PCI_INTB_IRQ;
					break;
				default:
					dev->irq = 0xff; 
					break;

			}
			break;
		case 0x13:
			switch (pin) {
				case 0: /* pin A, hardware bug */
				case 1: /* pin A */
					dev->irq = IT8172_PCI_INTA_IRQ;
					break;
				case 2: /* pin B */
					dev->irq = IT8172_PCI_INTB_IRQ;
					break;
				case 3: /* pin C */
					dev->irq = IT8172_PCI_INTC_IRQ;
					break;
				case 4: /* pin D */
					dev->irq = IT8172_PCI_INTD_IRQ;
					break;
				default:
					dev->irq = 0xff; 
					break;

			}
			break;
		default:
			return;
	}

#ifdef DEBUG
	printk("irq fixup: slot %d, vendor %x, int line %d, int number %d\n",
			slot, vendor, pin, dev->irq);
#endif
	pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);

}

struct pci_fixup pcibios_fixups[] = {
	{ PCI_FIXUP_HEADER, PCI_ANY_ID, PCI_ANY_ID, board_int_line_fixup },
	{ 0 }
};
#endif