1// SPDX-License-Identifier: GPL-2.0
2/*
3 * arch/sh/drivers/pci/fixups-landisk.c
4 *
5 * PCI initialization for the I-O DATA Device, Inc. LANDISK board
6 *
7 * Copyright (C) 2006 kogiidena
8 * Copyright (C) 2010 Nobuhiro Iwamatsu
9 */
10#include <linux/kernel.h>
11#include <linux/types.h>
12#include <linux/init.h>
13#include <linux/delay.h>
14#include <linux/pci.h>
15#include <linux/sh_intc.h>
16#include "pci-sh4.h"
17
18#define PCIMCR_MRSET_OFF	0xBFFFFFFF
19#define PCIMCR_RFSH_OFF		0xFFFFFFFB
20
21int pcibios_map_platform_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
22{
23	/*
24	 * slot0: pin1-4 = irq5,6,7,8
25	 * slot1: pin1-4 = irq6,7,8,5
26	 * slot2: pin1-4 = irq7,8,5,6
27	 * slot3: pin1-4 = irq8,5,6,7
28	 */
29	int irq = ((slot + pin - 1) & 0x3) + evt2irq(0x2a0);
30
31	if ((slot | (pin - 1)) > 0x3) {
32		printk(KERN_WARNING "PCI: Bad IRQ mapping request for slot %d pin %c\n",
33		       slot, pin - 1 + 'A');
34		return -1;
35	}
36	return irq;
37}
38
39int pci_fixup_pcic(struct pci_channel *chan)
40{
41	unsigned long bcr1, mcr;
42
43	bcr1 = __raw_readl(SH7751_BCR1);
44	bcr1 |= 0x40080000;	/* Enable Bit 19 BREQEN, set PCIC to slave */
45	pci_write_reg(chan, bcr1, SH4_PCIBCR1);
46
47	mcr = __raw_readl(SH7751_MCR);
48	mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF;
49	pci_write_reg(chan, mcr, SH4_PCIMCR);
50
51	pci_write_reg(chan, 0x0c000000, SH7751_PCICONF5);
52	pci_write_reg(chan, 0xd0000000, SH7751_PCICONF6);
53	pci_write_reg(chan, 0x0c000000, SH4_PCILAR0);
54	pci_write_reg(chan, 0x00000000, SH4_PCILAR1);
55
56	return 0;
57}
58