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 <linux/sh_intc.h> 18 #include "pci-sh4.h" 19 20 #define PCIMCR_MRSET_OFF 0xBFFFFFFF 21 #define PCIMCR_RFSH_OFF 0xFFFFFFFB 22 23 int pcibios_map_platform_irq(const struct pci_dev *pdev, u8 slot, u8 pin) 24 { 25 /* 26 * slot0: pin1-4 = irq5,6,7,8 27 * slot1: pin1-4 = irq6,7,8,5 28 * slot2: pin1-4 = irq7,8,5,6 29 * slot3: pin1-4 = irq8,5,6,7 30 */ 31 int irq = ((slot + pin - 1) & 0x3) + evt2irq(0x2a0); 32 33 if ((slot | (pin - 1)) > 0x3) { 34 printk(KERN_WARNING "PCI: Bad IRQ mapping request for slot %d pin %c\n", 35 slot, pin - 1 + 'A'); 36 return -1; 37 } 38 return irq; 39 } 40 41 int pci_fixup_pcic(struct pci_channel *chan) 42 { 43 unsigned long bcr1, mcr; 44 45 bcr1 = __raw_readl(SH7751_BCR1); 46 bcr1 |= 0x40080000; /* Enable Bit 19 BREQEN, set PCIC to slave */ 47 pci_write_reg(chan, bcr1, SH4_PCIBCR1); 48 49 mcr = __raw_readl(SH7751_MCR); 50 mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF; 51 pci_write_reg(chan, mcr, SH4_PCIMCR); 52 53 pci_write_reg(chan, 0x0c000000, SH7751_PCICONF5); 54 pci_write_reg(chan, 0xd0000000, SH7751_PCICONF6); 55 pci_write_reg(chan, 0x0c000000, SH4_PCILAR0); 56 pci_write_reg(chan, 0x00000000, SH4_PCILAR1); 57 58 return 0; 59 } 60