1 /* 2 * arch/sh/drivers/pci/fixups-landisk.c 3 * 4 * PCI initialization for the I-O DATA Device, Inc. LANDISK board 5 * 6 * Copyright (C) 2006 kogiidena 7 * Copyright (C) 2010 Nobuhiro Iwamatsu 8 * 9 * May be copied or modified under the terms of the GNU General Public 10 * License. See linux/COPYING for more information. 11 */ 12 #include <linux/kernel.h> 13 #include <linux/types.h> 14 #include <linux/init.h> 15 #include <linux/delay.h> 16 #include <linux/pci.h> 17 #include "pci-sh4.h" 18 19 #define PCIMCR_MRSET_OFF 0xBFFFFFFF 20 #define PCIMCR_RFSH_OFF 0xFFFFFFFB 21 22 int pcibios_map_platform_irq(struct pci_dev *pdev, u8 slot, u8 pin) 23 { 24 /* 25 * slot0: pin1-4 = irq5,6,7,8 26 * slot1: pin1-4 = irq6,7,8,5 27 * slot2: pin1-4 = irq7,8,5,6 28 * slot3: pin1-4 = irq8,5,6,7 29 */ 30 int irq = ((slot + pin - 1) & 0x3) + 5; 31 32 if ((slot | (pin - 1)) > 0x3) { 33 printk(KERN_WARNING "PCI: Bad IRQ mapping request for slot %d pin %c\n", 34 slot, pin - 1 + 'A'); 35 return -1; 36 } 37 return irq; 38 } 39 40 int pci_fixup_pcic(struct pci_channel *chan) 41 { 42 unsigned long bcr1, mcr; 43 44 bcr1 = __raw_readl(SH7751_BCR1); 45 bcr1 |= 0x40080000; /* Enable Bit 19 BREQEN, set PCIC to slave */ 46 pci_write_reg(chan, bcr1, SH4_PCIBCR1); 47 48 mcr = __raw_readl(SH7751_MCR); 49 mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF; 50 pci_write_reg(chan, mcr, SH4_PCIMCR); 51 52 pci_write_reg(chan, 0x0c000000, SH7751_PCICONF5); 53 pci_write_reg(chan, 0xd0000000, SH7751_PCICONF6); 54 pci_write_reg(chan, 0x0c000000, SH4_PCILAR0); 55 pci_write_reg(chan, 0x00000000, SH4_PCILAR1); 56 57 return 0; 58 } 59