1 // SPDX-License-Identifier: GPL-2.0
3 * arch/sh/drivers/pci/fixups-landisk.c
5 * PCI initialization for the I-O DATA Device, Inc. LANDISK board
7 * Copyright (C) 2006 kogiidena
8 * Copyright (C) 2010 Nobuhiro Iwamatsu
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>
18 #define PCIMCR_MRSET_OFF 0xBFFFFFFF
19 #define PCIMCR_RFSH_OFF 0xFFFFFFFB
21 int pcibios_map_platform_irq(const struct pci_dev *pdev, u8 slot, u8 pin)
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
29 int irq = ((slot + pin - 1) & 0x3) + evt2irq(0x2a0);
31 if ((slot | (pin - 1)) > 0x3) {
32 printk(KERN_WARNING "PCI: Bad IRQ mapping request for slot %d pin %c\n",
39 int pci_fixup_pcic(struct pci_channel *chan)
41 unsigned long bcr1, mcr;
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);
47 mcr = __raw_readl(SH7751_MCR);
48 mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF;
49 pci_write_reg(chan, mcr, SH4_PCIMCR);
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);