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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/sh/drivers/pci/fixups-landisk.c
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/*

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 * arch/sh/drivers/pci/fixups-landisk.c

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 *

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 * PCI initialization for the I-O DATA Device, Inc. LANDISK board

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 *

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 * Copyright (C) 2006 kogiidena

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 * Copyright (C) 2010 Nobuhiro Iwamatsu

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 *

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 * May be copied or modified under the terms of the GNU General Public

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 * License.  See linux/COPYING for more information.

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 */

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#include <linux/kernel.h>

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#include <linux/types.h>

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#include <linux/init.h>

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#include <linux/delay.h>

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#include <linux/pci.h>

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#include "pci-sh4.h"

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#define PCIMCR_MRSET_OFF	0xBFFFFFFF

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#define PCIMCR_RFSH_OFF		0xFFFFFFFB

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int pcibios_map_platform_irq(struct pci_dev *pdev, u8 slot, u8 pin)

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{

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	/*

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	 * slot0: pin1-4 = irq5,6,7,8

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	 * slot1: pin1-4 = irq6,7,8,5

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	 * slot2: pin1-4 = irq7,8,5,6

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	 * slot3: pin1-4 = irq8,5,6,7

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	 */

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	int irq = ((slot + pin - 1) & 0x3) + 5;

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	if ((slot | (pin - 1)) > 0x3) {

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		printk(KERN_WARNING "PCI: Bad IRQ mapping request for slot %d pin %c\n",

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		       slot, pin - 1 + 'A');

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		return -1;

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	}

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	return irq;

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}

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int pci_fixup_pcic(struct pci_channel *chan)

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{

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	unsigned long bcr1, mcr;

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	bcr1 = __raw_readl(SH7751_BCR1);

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	bcr1 |= 0x40080000;	/* Enable Bit 19 BREQEN, set PCIC to slave */

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	pci_write_reg(chan, bcr1, SH4_PCIBCR1);

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	mcr = __raw_readl(SH7751_MCR);

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	mcr = (mcr & PCIMCR_MRSET_OFF) & PCIMCR_RFSH_OFF;

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	pci_write_reg(chan, mcr, SH4_PCIMCR);

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	pci_write_reg(chan, 0x0c000000, SH7751_PCICONF5);

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	pci_write_reg(chan, 0xd0000000, SH7751_PCICONF6);

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	pci_write_reg(chan, 0x0c000000, SH4_PCILAR0);

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	pci_write_reg(chan, 0x00000000, SH4_PCILAR1);

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	return 0;

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}

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