| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * BRIEF MODULE DESCRIPTION |
| 4 | * Board specific pci fixups. |
| 5 | * |
| 6 | * Copyright 2001 MontaVista Software Inc. |
| 7 | * Author: MontaVista Software, Inc. |
| 8 | * ppopov@mvista.com or source@mvista.com |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms of the GNU General Public License as published by the |
| 12 | * Free Software Foundation; either version 2 of the License, or (at your |
| 13 | * option) any later version. |
| 14 | * |
| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 16 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 17 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
| 18 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 19 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 20 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| 21 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 22 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 24 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 25 | * |
| 26 | * You should have received a copy of the GNU General Public License along |
| 27 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 28 | * 675 Mass Ave, Cambridge, MA 02139, USA. |
| 29 | */ |
| 30 | #include <linux/types.h> |
| 31 | #include <asm/txx9/pci.h> |
| 32 | #include <asm/txx9/jmr3927.h> |
| 33 | |
| 34 | int jmr3927_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) |
| 35 | { |
| 36 | unsigned char irq = pin; |
| 37 | |
| 38 | /* IRQ rotation (PICMG) */ |
| 39 | irq--; /* 0-3 */ |
| 40 | if (slot == TX3927_PCIC_IDSEL_AD_TO_SLOT(23)) { |
| 41 | /* PCI CardSlot (IDSEL=A23, DevNu=12) */ |
| 42 | /* PCIA => PCIC (IDSEL=A23) */ |
| 43 | /* NOTE: JMR3927 JP1 must be set to OPEN */ |
| 44 | irq = (irq + 2) % 4; |
| 45 | } else if (slot == TX3927_PCIC_IDSEL_AD_TO_SLOT(22)) { |
| 46 | /* PCI CardSlot (IDSEL=A22, DevNu=11) */ |
| 47 | /* PCIA => PCIA (IDSEL=A22) */ |
| 48 | /* NOTE: JMR3927 JP1 must be set to OPEN */ |
| 49 | irq = (irq + 0) % 4; |
| 50 | } else { |
| 51 | /* PCI Backplane */ |
| 52 | if (txx9_pci_option & TXX9_PCI_OPT_PICMG) |
| 53 | irq = (irq + 33 - slot) % 4; |
| 54 | else |
| 55 | irq = (irq + 3 + slot) % 4; |
| 56 | } |
| 57 | irq++; /* 1-4 */ |
| 58 | |
| 59 | switch (irq) { |
| 60 | case 1: |
| 61 | irq = JMR3927_IRQ_IOC_PCIA; |
| 62 | break; |
| 63 | case 2: |
| 64 | irq = JMR3927_IRQ_IOC_PCIB; |
| 65 | break; |
| 66 | case 3: |
| 67 | irq = JMR3927_IRQ_IOC_PCIC; |
| 68 | break; |
| 69 | case 4: |
| 70 | irq = JMR3927_IRQ_IOC_PCID; |
| 71 | break; |
| 72 | } |
| 73 | |
| 74 | /* Check OnBoard Ethernet (IDSEL=A24, DevNu=13) */ |
| 75 | if (dev->bus->parent == NULL && |
| 76 | slot == TX3927_PCIC_IDSEL_AD_TO_SLOT(24)) |
| 77 | irq = JMR3927_IRQ_ETHER0; |
| 78 | return irq; |
| 79 | } |