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