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
jmr3927_pci_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)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 }
80