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fixup-rbtx4927.c
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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.
9  *
10  * Copyright (C) 2000-2001 Toshiba Corporation
11  *
12  * Copyright (C) 2004 MontaVista Software Inc.
13  * Author: Manish Lachwani ([email protected])
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 
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 */
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:
61  break;
62  case 2:
64  break;
65  case 3:
67  break;
68  case 4:
70  break;
71  }
72  return irq;
73 }