1 /*
2  * arch/sh/drivers/pci/fixups-landisk.c
3  *
4  * PCI initialization for the I-O DATA Device, Inc. LANDISK board
5  *
6  * Copyright (C) 2006 kogiidena
7  * Copyright (C) 2010 Nobuhiro Iwamatsu
8  *
9  * May be copied or modified under the terms of the GNU General Public
10  * License.  See linux/COPYING for more information.
11  */
12 #include <linux/kernel.h>
13 #include <linux/types.h>
14 #include <linux/init.h>
15 #include <linux/delay.h>
16 #include <linux/pci.h>
17 #include "pci-sh4.h"
18 
19 #define PCIMCR_MRSET_OFF	0xBFFFFFFF
20 #define PCIMCR_RFSH_OFF		0xFFFFFFFB
21 
22 int pcibios_map_platform_irq(struct pci_dev *pdev, u8 slot, u8 pin)
23 {
24 	/*
25 	 * slot0: pin1-4 = irq5,6,7,8
26 	 * slot1: pin1-4 = irq6,7,8,5
27 	 * slot2: pin1-4 = irq7,8,5,6
28 	 * slot3: pin1-4 = irq8,5,6,7
29 	 */
30 	int irq = ((slot + pin - 1) & 0x3) + 5;
31 
32 	if ((slot | (pin - 1)) > 0x3) {
33 		printk(KERN_WARNING "PCI: Bad IRQ mapping request for slot %d pin %c\n",
34 		       slot, pin - 1 + 'A');
35 		return -1;
36 	}
37 	return irq;
38 }
39 
40 int pci_fixup_pcic(struct pci_channel *chan)
41 {
42 	unsigned long bcr1, mcr;
43 
44 	bcr1 = __raw_readl(SH7751_BCR1);
45 	bcr1 |= 0x40080000;	/* Enable Bit 19 BREQEN, set PCIC to slave */
46 	pci_write_reg(chan, bcr1, SH4_PCIBCR1);
47 
48 	mcr = __raw_readl(SH7751_MCR);
49 	mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF;
50 	pci_write_reg(chan, mcr, SH4_PCIMCR);
51 
52 	pci_write_reg(chan, 0x0c000000, SH7751_PCICONF5);
53 	pci_write_reg(chan, 0xd0000000, SH7751_PCICONF6);
54 	pci_write_reg(chan, 0x0c000000, SH4_PCILAR0);
55 	pci_write_reg(chan, 0x00000000, SH4_PCILAR1);
56 
57 	return 0;
58 }
59