Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/mips/pci/fixup-rc32434.c
26439 views
1
/*

2
 * Copyright 2001 MontaVista Software Inc.

3
 * Author: MontaVista Software, Inc.

4
 *         	[email protected] or [email protected]

5
 *

6
 *  This program is free software; you can redistribute  it and/or modify it

7
 *  under  the terms of  the GNU General  Public License as published by the

8
 *  Free Software Foundation;  either version 2 of the  License, or (at your

9
 *  option) any later version.

10
 *

11
 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED

12
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF

13
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN

14
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,

15
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

16
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF

17
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON

18
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT

19
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

20
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

21
 *

22
 *  You should have received a copy of the  GNU General Public License along

23
 *  with this program; if not, write  to the Free Software Foundation, Inc.,

24
 *  675 Mass Ave, Cambridge, MA 02139, USA.

25
 */

26


27
#include <linux/types.h>

28
#include <linux/pci.h>

29
#include <linux/kernel.h>

30


31
#include <asm/mach-rc32434/rc32434.h>

32
#include <asm/mach-rc32434/irq.h>

33


34
static int irq_map[2][12] = {

35
	{0, 0, 2, 3, 2, 3, 0, 0, 0, 0, 0, 1},

36
	{0, 0, 1, 3, 0, 2, 1, 3, 0, 2, 1, 3}

37
};

38


39
int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)

40
{

41
	int irq = 0;

42


43
	if (dev->bus->number < 2 && PCI_SLOT(dev->devfn) < 12)

44
		irq = irq_map[dev->bus->number][PCI_SLOT(dev->devfn)];

45


46
	return irq + GROUP4_IRQ_BASE + 4;

47
}

48


49
static void rc32434_pci_early_fixup(struct pci_dev *dev)

50
{

51
	if (PCI_SLOT(dev->devfn) == 6 && dev->bus->number == 0) {

52
		/* disable prefetched memory range */

53
		pci_write_config_word(dev, PCI_PREF_MEMORY_LIMIT, 0);

54
		pci_write_config_word(dev, PCI_PREF_MEMORY_BASE, 0x10);

55


56
		pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 4);

57
	}

58
}

59


60
/*

61
 * The fixup applies to both the IDT and VIA devices present on the board

62
 */

63
DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, rc32434_pci_early_fixup);

64


65
/* Do platform specific device initialization at pci_enable_device() time */

66
int pcibios_plat_dev_init(struct pci_dev *dev)

67
{

68
	return 0;

69
}

70


71