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
pcibios_map_platform_irq(struct pci_dev * pdev,u8 slot,u8 pin)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
pci_fixup_pcic(struct pci_channel * chan)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