1 /*
2 *
3 * BRIEF MODULE DESCRIPTION
4 * Board specific pci fixups for the Toshiba rbtx4927
5 *
6 * Copyright 2001 MontaVista Software Inc.
7 * Author: MontaVista Software, Inc.
8 * ppopov@mvista.com or source@mvista.com
9 *
10 * Copyright (C) 2000-2001 Toshiba Corporation
11 *
12 * Copyright (C) 2004 MontaVista Software Inc.
13 * Author: Manish Lachwani (mlachwani@mvista.com)
14 *
15 * This program is free software; you can redistribute it and/or modify it
16 * under the terms of the GNU General Public License as published by the
17 * Free Software Foundation; either version 2 of the License, or (at your
18 * option) any later version.
19 *
20 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
21 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
23 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
26 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
27 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * You should have received a copy of the GNU General Public License along
32 * with this program; if not, write to the Free Software Foundation, Inc.,
33 * 675 Mass Ave, Cambridge, MA 02139, USA.
34 */
35 #include <linux/types.h>
36 #include <asm/txx9/pci.h>
37 #include <asm/txx9/rbtx4927.h>
38
39 int rbtx4927_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
40 {
41 unsigned char irq = pin;
42
43 /* IRQ rotation */
44 irq--; /* 0-3 */
45 if (slot == TX4927_PCIC_IDSEL_AD_TO_SLOT(23)) {
46 /* PCI CardSlot (IDSEL=A23) */
47 /* PCIA => PCIA */
48 irq = (irq + 0 + slot) % 4;
49 } else {
50 /* PCI Backplane */
51 if (txx9_pci_option & TXX9_PCI_OPT_PICMG)
52 irq = (irq + 33 - slot) % 4;
53 else
54 irq = (irq + 3 + slot) % 4;
55 }
56 irq++; /* 1-4 */
57
58 switch (irq) {
59 case 1:
60 irq = RBTX4927_IRQ_IOC_PCIA;
61 break;
62 case 2:
63 irq = RBTX4927_IRQ_IOC_PCIB;
64 break;
65 case 3:
66 irq = RBTX4927_IRQ_IOC_PCIC;
67 break;
68 case 4:
69 irq = RBTX4927_IRQ_IOC_PCID;
70 break;
71 }
72 return irq;
73 }