1 /*
2  * arch/sh/drivers/pci/ops-landisk.c
3  *
4  * PCI initialization for the I-O DATA Device, Inc. LANDISK board
5  *
6  * Copyright (C) 2006 kogiidena
7  *
8  * May be copied or modified under the terms of the GNU General Public
9  * License.  See linux/COPYING for more information.
10  */
11 #include <linux/kernel.h>
12 #include <linux/types.h>
13 #include <linux/init.h>
14 #include <linux/delay.h>
15 #include <linux/pci.h>
16 #include "pci-sh4.h"
17 
18 int pcibios_map_platform_irq(struct pci_dev *pdev, u8 slot, u8 pin)
19 {
20 	/*
21 	 * slot0: pin1-4 = irq5,6,7,8
22 	 * slot1: pin1-4 = irq6,7,8,5
23 	 * slot2: pin1-4 = irq7,8,5,6
24 	 * slot3: pin1-4 = irq8,5,6,7
25 	 */
26 	int irq = ((slot + pin - 1) & 0x3) + 5;
27 
28 	if ((slot | (pin - 1)) > 0x3) {
29 		printk("PCI: Bad IRQ mapping request for slot %d pin %c\n",
30 		       slot, pin - 1 + 'A');
31 		return -1;
32 	}
33 	return irq;
34 }
35