Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/mips/pci/fixup-emma2rh.c
10818 views
1
/*

2
 *  Copyright (C) NEC Electronics Corporation 2004-2006

3
 *

4
 *  This file is based on the arch/mips/ddb5xxx/ddb5477/pci.c

5
 *

6
 *	Copyright 2001 MontaVista Software Inc.

7
 *

8
 *  This program is free software; you can redistribute it and/or modify

9
 *  it under the terms of the GNU General Public License as published by

10
 *  the Free Software Foundation; either version 2 of the License, or

11
 *  (at your option) any later version.

12
 *

13
 *  This program is distributed in the hope that it will be useful,

14
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

15
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

16
 *  GNU General Public License for more details.

17
 *

18
 *  You should have received a copy of the GNU General Public License

19
 *  along with this program; if not, write to the Free Software

20
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

21
 */

22


23
#include <linux/kernel.h>

24
#include <linux/init.h>

25
#include <linux/types.h>

26
#include <linux/pci.h>

27


28
#include <asm/bootinfo.h>

29


30
#include <asm/emma/emma2rh.h>

31


32
#define EMMA2RH_PCI_HOST_SLOT 0x09

33
#define EMMA2RH_USB_SLOT 0x03

34
#define PCI_DEVICE_ID_NEC_EMMA2RH      0x014b /* EMMA2RH PCI Host */

35


36
/*

37
 * we fix up irqs based on the slot number.

38
 * The first entry is at AD:11.

39
 * Fortunately this works because, although we have two pci buses,

40
 * they all have different slot numbers (except for rockhopper slot 20

41
 * which is handled below).

42
 *

43
 */

44


45
#define	MAX_SLOT_NUM 10

46
static unsigned char irq_map[][5] __initdata = {

47
	[3] = {0, MARKEINS_PCI_IRQ_INTB, MARKEINS_PCI_IRQ_INTC,

48
	       MARKEINS_PCI_IRQ_INTD, 0,},

49
	[4] = {0, MARKEINS_PCI_IRQ_INTA, 0, 0, 0,},

50
	[5] = {0, 0, 0, 0, 0,},

51
	[6] = {0, MARKEINS_PCI_IRQ_INTC, MARKEINS_PCI_IRQ_INTD,

52
	       MARKEINS_PCI_IRQ_INTA, MARKEINS_PCI_IRQ_INTB,},

53
};

54


55
static void __devinit nec_usb_controller_fixup(struct pci_dev *dev)

56
{

57
	if (PCI_SLOT(dev->devfn) == EMMA2RH_USB_SLOT)

58
		/* on board USB controller configuration */

59
		pci_write_config_dword(dev, 0xe4, 1 << 5);

60
}

61


62
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_USB,

63
			nec_usb_controller_fixup);

64


65
/*

66
 * Prevent the PCI layer from seeing the resources allocated to this device

67
 * if it is the host bridge by marking it as such.  These resources are of

68
 * no consequence to the PCI layer (they are handled elsewhere).

69
 */

70
static void __devinit emma2rh_pci_host_fixup(struct pci_dev *dev)

71
{

72
	int i;

73


74
	if (PCI_SLOT(dev->devfn) == EMMA2RH_PCI_HOST_SLOT) {

75
		dev->class &= 0xff;

76
		dev->class |= PCI_CLASS_BRIDGE_HOST << 8;

77
		for (i = 0; i < PCI_NUM_RESOURCES; i++) {

78
			dev->resource[i].start = 0;

79
			dev->resource[i].end = 0;

80
			dev->resource[i].flags = 0;

81
		}

82
	}

83
}

84


85
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_EMMA2RH,

86
			 emma2rh_pci_host_fixup);

87


88
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)

89
{

90
	return irq_map[slot][pin];

91
}

92


93
/* Do platform specific device initialization at pci_enable_device() time */

94
int pcibios_plat_dev_init(struct pci_dev *dev)

95
{

96
	return 0;

97
}

98


99