diff options
Diffstat (limited to 'arch/mips/pci/fixup-jmr3927.c')
| -rw-r--r-- | arch/mips/pci/fixup-jmr3927.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/arch/mips/pci/fixup-jmr3927.c b/arch/mips/pci/fixup-jmr3927.c new file mode 100644 index 00000000000..f8696081c5b --- /dev/null +++ b/arch/mips/pci/fixup-jmr3927.c @@ -0,0 +1,105 @@ +/* + * + * BRIEF MODULE DESCRIPTION + * Board specific pci fixups. + * + * Copyright 2001 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/types.h> +#include <linux/pci.h> +#include <linux/kernel.h> +#include <linux/init.h> + +#include <asm/jmr3927/jmr3927.h> + +int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin) +{ + unsigned char irq = pin; + + /* IRQ rotation (PICMG) */ + irq--; /* 0-3 */ + if (dev->bus->parent == NULL && + slot == TX3927_PCIC_IDSEL_AD_TO_SLOT(23)) { + /* PCI CardSlot (IDSEL=A23, DevNu=12) */ + /* PCIA => PCIC (IDSEL=A23) */ + /* NOTE: JMR3927 JP1 must be set to OPEN */ + irq = (irq + 2) % 4; + } else if (dev->bus->parent == NULL && + slot == TX3927_PCIC_IDSEL_AD_TO_SLOT(22)) { + /* PCI CardSlot (IDSEL=A22, DevNu=11) */ + /* PCIA => PCIA (IDSEL=A22) */ + /* NOTE: JMR3927 JP1 must be set to OPEN */ + irq = (irq + 0) % 4; + } else { + /* PCI Backplane */ + irq = (irq + 3 + slot) % 4; + } + irq++; /* 1-4 */ + + switch (irq) { + case 1: + irq = JMR3927_IRQ_IOC_PCIA; + break; + case 2: + // wrong for backplane irq = JMR3927_IRQ_IOC_PCIB; + irq = JMR3927_IRQ_IOC_PCID; + break; + case 3: + irq = JMR3927_IRQ_IOC_PCIC; + break; + case 4: + // wrong for backplane irq = JMR3927_IRQ_IOC_PCID; + irq = JMR3927_IRQ_IOC_PCIB; + break; + } + + /* Check OnBoard Ethernet (IDSEL=A24, DevNu=13) */ + if (dev->bus->parent == NULL && + slot == TX3927_PCIC_IDSEL_AD_TO_SLOT(24)) { + extern int jmr3927_ether1_irq; + /* check this irq line was reserved for ether1 */ + if (jmr3927_ether1_irq != JMR3927_IRQ_ETHER0) + irq = JMR3927_IRQ_ETHER0; + else + irq = 0; /* disable */ + } + return irq; +} + +/* Do platform specific device initialization at pci_enable_device() time */ +int pcibios_plat_dev_init(struct pci_dev *dev) +{ + return 0; +} + +int __init pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin) +{ + /* SMSC SLC90E66 IDE uses irq 14, 15 (default) */ + if (!(dev->vendor == PCI_VENDOR_ID_EFAR && + dev->device == PCI_DEVICE_ID_EFAR_SLC90E66_1)) + return pci_get_irq(dev, pin); + + dev->irq = irq; +} |