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, val: bcr1, SH4_PCIBCR1);
46
47 mcr = __raw_readl(SH7751_MCR);
48 mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF;
49 pci_write_reg(chan, val: mcr, SH4_PCIMCR);
50
51 pci_write_reg(chan, val: 0x0c000000, SH7751_PCICONF5);
52 pci_write_reg(chan, val: 0xd0000000, SH7751_PCICONF6);
53 pci_write_reg(chan, val: 0x0c000000, SH4_PCILAR0);
54 pci_write_reg(chan, val: 0x00000000, SH4_PCILAR1);
55
56 return 0;
57}
58

source code of linux/arch/sh/drivers/pci/fixups-landisk.c