pci_fixup.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:4k
- /*
- *
- * BRIEF MODULE DESCRIPTION
- * Globespan IVR board-specific pci fixups.
- *
- * Copyright 2000 MontaVista Software Inc.
- * Author: MontaVista Software, Inc.
- * ppopov@mvista.com or source@mvista.com
- *
- * 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 %dn", 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 %dn",
- 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