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 21 int 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 39 int 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