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 <linux/sh_intc.h>
18#include "pci-sh4.h"
19
20#define PCIMCR_MRSET_OFF	0xBFFFFFFF
21#define PCIMCR_RFSH_OFF		0xFFFFFFFB
22
23int pcibios_map_platform_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
24{
25	/*
26	 * slot0: pin1-4 = irq5,6,7,8
27	 * slot1: pin1-4 = irq6,7,8,5
28	 * slot2: pin1-4 = irq7,8,5,6
29	 * slot3: pin1-4 = irq8,5,6,7
30	 */
31	int irq = ((slot + pin - 1) & 0x3) + evt2irq(0x2a0);
32
33	if ((slot | (pin - 1)) > 0x3) {
34		printk(KERN_WARNING "PCI: Bad IRQ mapping request for slot %d pin %c\n",
35		       slot, pin - 1 + 'A');
36		return -1;
37	}
38	return irq;
39}
40
41int pci_fixup_pcic(struct pci_channel *chan)
42{
43	unsigned long bcr1, mcr;
44
45	bcr1 = __raw_readl(SH7751_BCR1);
46	bcr1 |= 0x40080000;	/* Enable Bit 19 BREQEN, set PCIC to slave */
47	pci_write_reg(chan, bcr1, SH4_PCIBCR1);
48
49	mcr = __raw_readl(SH7751_MCR);
50	mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF;
51	pci_write_reg(chan, mcr, SH4_PCIMCR);
52
53	pci_write_reg(chan, 0x0c000000, SH7751_PCICONF5);
54	pci_write_reg(chan, 0xd0000000, SH7751_PCICONF6);
55	pci_write_reg(chan, 0x0c000000, SH4_PCILAR0);
56	pci_write_reg(chan, 0x00000000, SH4_PCILAR1);
57
58	return 0;
59}
60