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// SPDX-License-Identifier: GPL-2.0
/*
* arch/sh/drivers/pci/fixups-landisk.c
*
* PCI initialization for the I-O DATA Device, Inc. LANDISK board
*
* Copyright (C) 2006 kogiidena
* Copyright (C) 2010 Nobuhiro Iwamatsu
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/sh_intc.h>
#include "pci-sh4.h"
#define PCIMCR_MRSET_OFF 0xBFFFFFFF
#define PCIMCR_RFSH_OFF 0xFFFFFFFB
int pcibios_map_platform_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
{
/*
* slot0: pin1-4 = irq5,6,7,8
* slot1: pin1-4 = irq6,7,8,5
* slot2: pin1-4 = irq7,8,5,6
* slot3: pin1-4 = irq8,5,6,7
*/
int irq = ((slot + pin - 1) & 0x3) + evt2irq(0x2a0);
if ((slot | (pin - 1)) > 0x3) {
printk(KERN_WARNING "PCI: Bad IRQ mapping request for slot %d pin %c\n",
slot, pin - 1 + 'A');
return -1;
}
return irq;
}
int pci_fixup_pcic(struct pci_channel *chan)
{
unsigned long bcr1, mcr;
bcr1 = __raw_readl(SH7751_BCR1);
bcr1 |= 0x40080000; /* Enable Bit 19 BREQEN, set PCIC to slave */
pci_write_reg(chan, bcr1, SH4_PCIBCR1);
mcr = __raw_readl(SH7751_MCR);
mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF;
pci_write_reg(chan, mcr, SH4_PCIMCR);
pci_write_reg(chan, 0x0c000000, SH7751_PCICONF5);
pci_write_reg(chan, 0xd0000000, SH7751_PCICONF6);
pci_write_reg(chan, 0x0c000000, SH4_PCILAR0);
pci_write_reg(chan, 0x00000000, SH4_PCILAR1);
return 0;
}
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