xref: /openbmc/linux/arch/mips/pci/fixup-rc32434.c (revision 3b2663ca)
1 /*
2  * Copyright 2001 MontaVista Software Inc.
3  * Author: MontaVista Software, Inc.
4  *         	stevel@mvista.com or source@mvista.com
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 
pcibios_map_irq(const struct pci_dev * dev,u8 slot,u8 pin)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 
rc32434_pci_early_fixup(struct pci_dev * dev)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 */
pcibios_plat_dev_init(struct pci_dev * dev)66 int pcibios_plat_dev_init(struct pci_dev *dev)
67 {
68 	return 0;
69 }
70